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  <xsd:element id="acfn_BirdFoundationAdvancePaymentDsitPortion" name="BirdFoundationAdvancePaymentDsitPortion" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_BirdFoundationAdvancePaymentUssiPortion" name="BirdFoundationAdvancePaymentUssiPortion" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_BirdRoyaltyRateOnGrossSales" name="BirdRoyaltyRateOnGrossSales" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_BonusPoolGridsenseEmployeeIncentivePlan" name="BonusPoolGridsenseEmployeeIncentivePlan" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_BookValueOfGoodwillRelatedToCoreworx" name="BookValueOfGoodwillRelatedToCoreworx" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_BookValueOfIntangibleAssetsExludingGoodwillRelatedToCoreworx" name="BookValueOfIntangibleAssetsExludingGoodwillRelatedToCoreworx" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_BusinessAcquisitionPurchasePriceAllocationGainOnStepUpOfInvestment" name="BusinessAcquisitionPurchasePriceAllocationGainOnStepUpOfInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_BusinessAcquisitionPurchasePriceAllocationPreviouslyInvestedAmounts" name="BusinessAcquisitionPurchasePriceAllocationPreviouslyInvestedAmounts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_CashAmountInvestedInSubsidiaryAsOfBalanceSheetDate" name="CashAmountInvestedInSubsidiaryAsOfBalanceSheetDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_CashAndCashEquivalentsAtBeginningOfYearOfContinuingOperations" name="CashAndCashEquivalentsAtBeginningOfYearOfContinuingOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_CashAndCashEquivalentsAtBeginningOfYearOfDiscontinuedOperations" name="CashAndCashEquivalentsAtBeginningOfYearOfDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_CashAndCashEquivalentsAtEndOfYearBeforeRemovingDiscOpsCash" name="CashAndCashEquivalentsAtEndOfYearBeforeRemovingDiscOpsCash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_CashAndCashEquivalentsHeldByContinuingOperationsAtEndOfYear" name="CashAndCashEquivalentsHeldByContinuingOperationsAtEndOfYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_ClassOfWarrantOrRightOutstandingRollForward" name="ClassOfWarrantOrRightOutstandingRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CommitmentsAndContingenciesAbstract" name="CommitmentsAndContingenciesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_CompositionOfFiniteLivedIntangiblesByClassTableTextBlock" name="CompositionOfFiniteLivedIntangiblesByClassTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation" name="ComputerHardwareAndSoftwareAccumulatedDepreciation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_ComputerHardwareAndSoftwareMember" name="ComputerHardwareAndSoftwareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CondensedConsolidatedStatementsOfComprehensiveLossAbstract" name="CondensedConsolidatedStatementsOfComprehensiveLossAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ConsiderationPaidInAcquisition" name="ConsiderationPaidInAcquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ContributionsToSuperannuationFund" name="ContributionsToSuperannuationFund" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CostAndAccumulatedAmortizationOfIntangiblesAxis" name="CostAndAccumulatedAmortizationOfIntangiblesAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_CostMethodInvestmentOwnershipPercentage" name="CostMethodInvestmentOwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_CostMethodInvestmentProceedsFromSale" name="CostMethodInvestmentProceedsFromSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_CumulativePercentageOwnershipAfterAllFutureTransactions" name="CumulativePercentageOwnershipAfterAllFutureTransactions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_CurrentCumulativeProductSalesSubjectToGridsenseRoyalty" name="CurrentCumulativeProductSalesSubjectToGridsenseRoyalty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_CustomerBMember" name="CustomerBMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CustomerCMember" name="CustomerCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CustomerDMember" name="CustomerDMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CustomerEMember" name="CustomerEMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_CustomerMember" name="CustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_DeferredTaxAssetsAttributableToInvestmentsAndAssetImpairments" name="DeferredTaxAssetsAttributableToInvestmentsAndAssetImpairments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_DeferredTaxAssetsAttributableToNetOperatingAndCapitalLossCarryforwards" name="DeferredTaxAssetsAttributableToNetOperatingAndCapitalLossCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_DeferredTaxLiabilitiesAttributableToInstallmentSaleOfInvestmentInSubsidiary" name="DeferredTaxLiabilitiesAttributableToInstallmentSaleOfInvestmentInSubsidiary" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_DeferredTaxLiabilitiesAttributableToRevenueRecognitionTimingDifferences" name="DeferredTaxLiabilitiesAttributableToRevenueRecognitionTimingDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_DeiAbstract" name="DeiAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_DepreciationAndAmortizationReconciliationFromSegmentToConsolidated" name="DepreciationAndAmortizationReconciliationFromSegmentToConsolidated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_DiscontinuedOperationsAbstract" name="DiscontinuedOperationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_DiscountToMarketPriceDividendReinvestmentPlan" name="DiscountToMarketPriceDividendReinvestmentPlan" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_DividendReinvestmentPlanDiscount" name="DividendReinvestmentPlanDiscount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_DividendsPaidTableTextBlock" name="DividendsPaidTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_DividendsPayablePaidInFollowingPeriod" name="DividendsPayablePaidInFollowingPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_DsitOptionPlanModifiedOptionsExtendedExpirationDate" name="DsitOptionPlanModifiedOptionsExtendedExpirationDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_EnergySecuritySonarSolutionsSegmentMember" name="EnergySecuritySonarSolutionsSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_EquipmentAccumulatedDepreciation" name="EquipmentAccumulatedDepreciation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_EscrowDepositForIndemnificationClaims" name="EscrowDepositForIndemnificationClaims" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_EstimatedFairMarketValueOfAcquiredTechnology" name="EstimatedFairMarketValueOfAcquiredTechnology" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_EstimatedUsefulLifeInYearsOfAcquiredIntellectualProperty" name="EstimatedUsefulLifeInYearsOfAcquiredIntellectualProperty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_EstimatedUsefulLifeInYearsOfAcquiredNonCompeteAgreements" name="EstimatedUsefulLifeInYearsOfAcquiredNonCompeteAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ExcessOfFairValueOfReportingUnitOverCarryingValue" name="ExcessOfFairValueOfReportingUnitOverCarryingValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_ExerciseOfOptionsAndWarrants" name="ExerciseOfOptionsAndWarrants" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_ExercisePriceRangeFiveMember" name="ExercisePriceRangeFiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_ExercisePriceRangeFourMember" name="ExercisePriceRangeFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_ExercisePriceRangeOneMember" name="ExercisePriceRangeOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_ExercisePriceRangeSixMember" name="ExercisePriceRangeSixMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_ExercisePriceRangeThreeMember" name="ExercisePriceRangeThreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_ExercisePriceRangeTwoMember" name="ExercisePriceRangeTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ExpenditureForAssetsReconciliationFromSegmentToConsolidated" name="ExpenditureForAssetsReconciliationFromSegmentToConsolidated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ExpiringDsitWarrants" name="ExpiringDsitWarrants" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_FairValueConcentrationOfRiskPercentageOfTotalAccountsReceivable" name="FairValueConcentrationOfRiskPercentageOfTotalAccountsReceivable" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_FairValueConcentrationOfRiskUnbilledRevenueNumberOfCustomers" name="FairValueConcentrationOfRiskUnbilledRevenueNumberOfCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_FairValueDisclosureOffBalanceSheetRisksFaceAmountLiabilityCurrent" name="FairValueDisclosureOffBalanceSheetRisksFaceAmountLiabilityCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_FairValueDisclosureOffBalanceSheetRisksFaceAmountLiabilityNoncurrent" name="FairValueDisclosureOffBalanceSheetRisksFaceAmountLiabilityNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_FairValueMeasurementsAbstract" name="FairValueMeasurementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_FairValuePercentageConcentrationOfRiskUnbilledRevenue" name="FairValuePercentageConcentrationOfRiskUnbilledRevenue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_FederalNetOperatingLossCarryforwardsSubjectToExpirationDate" name="FederalNetOperatingLossCarryforwardsSubjectToExpirationDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_FederalNetOperatingLossCarryforwardsThatAreNotSubjectToExpirationDate" name="FederalNetOperatingLossCarryforwardsThatAreNotSubjectToExpirationDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_FinanceExpenseNetAbstract" name="FinanceExpenseNetAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_FinanceExpenseNetTextBlock" name="FinanceExpenseNetTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_FinanceIncomeExpenseNet" name="FinanceIncomeExpenseNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_FinancialInstrumentsAbstract" name="FinancialInstrumentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_FixedAssetsNetAbstract" name="FixedAssetsNetAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ForeignNetOperatingLossCarryforwardSubjectToExpiration" name="ForeignNetOperatingLossCarryforwardSubjectToExpiration" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ForeignNetOperatingLossCarryforwardsNotSubjectToExpiration" name="ForeignNetOperatingLossCarryforwardsNotSubjectToExpiration" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_FullyDilutedOwnership" name="FullyDilutedOwnership" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_FutureRoyaltyPaymentForLicenseAgreement" name="FutureRoyaltyPaymentForLicenseAgreement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_GainAsResultOfDeconsolidationOfSubsidiary" name="GainAsResultOfDeconsolidationOfSubsidiary" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_GoodwillAndIntangibleAssetsAbstract" name="GoodwillAndIntangibleAssetsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_GridsenseAcquistionMember" name="GridsenseAcquistionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_GridsenseRoyaltyDueOnCertainProductSales" name="GridsenseRoyaltyDueOnCertainProductSales" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_GridsenseSegmentMember" name="GridsenseSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_GridsenseTechnologiesFiniteIntangibleAssetAcquired" name="GridsenseTechnologiesFiniteIntangibleAssetAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_GridsenseTechnologiesFiniteIntangibleAssetAcquiredUsefulLife" name="GridsenseTechnologiesFiniteIntangibleAssetAcquiredUsefulLife" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_GridsenseTradeNameAcquiredUsefulLife" name="GridsenseTradeNameAcquiredUsefulLife" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_GrossCostIntangiblesMember" name="GrossCostIntangiblesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ImpairmentOfCompanysGoodwillAndOtherIntangibleAssetsRelatedToCoreworx" name="ImpairmentOfCompanysGoodwillAndOtherIntangibleAssetsRelatedToCoreworx" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_IncomeTaxesAbstract" name="IncomeTaxesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_IncreaseInLiabilityForEmployeeTerminationBenefits" name="IncreaseInLiabilityForEmployeeTerminationBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_IncreaseInNumberOfSharesInStockOptionPlan" name="IncreaseInNumberOfSharesInStockOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_IncreaseInSharesIn2006DirectorStockOptionPlan" name="IncreaseInSharesIn2006DirectorStockOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_IncrementalCommonSharesAttributableToWarrantsOutstanding" name="IncrementalCommonSharesAttributableToWarrantsOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_IntangibleAssetAcquiredByCoalogix" name="IntangibleAssetAcquiredByCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_IntangibleAssetsAcquiredInAcquisition" name="IntangibleAssetsAcquiredInAcquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_InterestInAdditionToPrimeRate" name="InterestInAdditionToPrimeRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_InterestRateOnLinesOfCreditSubjectToCertainFormula" name="InterestRateOnLinesOfCreditSubjectToCertainFormula" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_InterestRateOnLoanReceivedFromGridsenseCeo" name="InterestRateOnLoanReceivedFromGridsenseCeo" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_InterestRateOnLoanReceivedFromGridsenseDirector" name="InterestRateOnLoanReceivedFromGridsenseDirector" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_InterestRateToBeAddedToPrimeRate" name="InterestRateToBeAddedToPrimeRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt" name="InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_InventoryCompositionAbstract" name="InventoryCompositionAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_InventoryWriteOffGridsense" name="InventoryWriteOffGridsense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_InvestmentCommitmentMaximumAmount" name="InvestmentCommitmentMaximumAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_InvestmentCommitmentMaximumPossiblePeriodToInvest" name="InvestmentCommitmentMaximumPossiblePeriodToInvest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_IsraeliPrimeRatePerAnnum" name="IsraeliPrimeRatePerAnnum" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_LeaseholdImprovementsAccumulatedDepreciation" name="LeaseholdImprovementsAccumulatedDepreciation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks" name="LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_LoanReceivedFromGridsenceDirector" name="LoanReceivedFromGridsenceDirector" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_LoanReceivedFromGridsencesCeo" name="LoanReceivedFromGridsencesCeo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_LongIvedAssetsUnitedStates" name="LongIvedAssetsUnitedStates" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_LongLivedAssetsAustralia" name="LongLivedAssetsAustralia" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_LongLivedAssetsIsrael" name="LongLivedAssetsIsrael" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_LossFromDiscontinuedOperationsNetOfTax" name="LossFromDiscontinuedOperationsNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement" name="MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod" name="MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod" name="MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_MaximumPercentageContributionToSuperannuationFund" name="MaximumPercentageContributionToSuperannuationFund" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_MinimumRoyaltyPaymentForLicensePeriod" name="MinimumRoyaltyPaymentForLicensePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_MinimumSalesNeededForGridsenseRoyalty" name="MinimumSalesNeededForGridsenseRoyalty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_NatureOfOperationsAbstract" name="NatureOfOperationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_NetCarryingValueIntangiblesDomain" name="NetCarryingValueIntangiblesDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetGainAfterTaxOnSaleOfCoalogix" name="NetGainAfterTaxOnSaleOfCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetIncomeAttributableToNciInDsit" name="NetIncomeAttributableToNciInDsit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetIncomeLossBeforeIncomeTaxesForReportableSegments" name="NetIncomeLossBeforeIncomeTaxesForReportableSegments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetIncomeLossBeforeNonControllingInterests" name="NetIncomeLossBeforeNonControllingInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetLossAttributableToNciInUssi" name="NetLossAttributableToNciInUssi" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetLossFromDiscontinuedOperationsNetOfIncomeTaxesCoalogix" name="NetLossFromDiscontinuedOperationsNetOfIncomeTaxesCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NetLossFromDiscontinuedOperationsNetOfIncomeTaxesCoreworx" name="NetLossFromDiscontinuedOperationsNetOfIncomeTaxesCoreworx" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_NonControllingInterestsAbstract" name="NonControllingInterestsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_NonControllingInterestsAcquiredInAcquisition" name="NonControllingInterestsAcquiredInAcquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NonControllingInterestsShareInIncomeLossTableTextBlock" name="NonControllingInterestsShareInIncomeLossTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_NonControllingInterestsShareOfCoalogixsNetLoss" name="NonControllingInterestsShareOfCoalogixsNetLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_NumberOfCoreworxNonVotingSharesOfCommonStockIssuedToAcornInCoreworxSaleTransaction" name="NumberOfCoreworxNonVotingSharesOfCommonStockIssuedToAcornInCoreworxSaleTransaction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_NumberOfCustomersConcentrationOfReceivables" name="NumberOfCustomersConcentrationOfReceivables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_NumberOfSharesIssuedInConsiderationForBusinessCombination" name="NumberOfSharesIssuedInConsiderationForBusinessCombination" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_OmiAcquistionMember" name="OmiAcquistionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_OmnimetrixAcquistionMember" name="OmnimetrixAcquistionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_OmnimetrixTechnologies" name="OmnimetrixTechnologies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_OmnimetrixTechnologiesMember" name="OmnimetrixTechnologiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_OtherCurrentLiabilitiesAbstract" name="OtherCurrentLiabilitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_OtherCurrentLiabilitiesTableTextBlock" name="OtherCurrentLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_OtherOperatingSegmentNetIncomeLossBeforeIncomeTaxes" name="OtherOperatingSegmentNetIncomeLossBeforeIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_OtherOperationalSegmentRevenues" name="OtherOperationalSegmentRevenues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_OwenershipPercentage" name="OwenershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ParentPercentageOfOwnershipInSubsidiaryFollowingSecondClosingInAccordanceWithUssiPurchaseAgreement" name="ParentPercentageOfOwnershipInSubsidiaryFollowingSecondClosingInAccordanceWithUssiPurchaseAgreement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired" name="PaymentToAcquireOmnimetrixNetOfCashAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_PaymentsToAcquireCostMethodInvestments" name="PaymentsToAcquireCostMethodInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_PercentageExcessOfFairValueOfReportingUnitOverCarryingValue" name="PercentageExcessOfFairValueOfReportingUnitOverCarryingValue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_PercentageOfAcornHoldingsInCoreworxNewlyIssuedAndNonvotingSharesPursuantToSaleTransaction" name="PercentageOfAcornHoldingsInCoreworxNewlyIssuedAndNonvotingSharesPursuantToSaleTransaction" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_PercentageOfCoreworxCurrentCommonStockOutstandingRepresentedByWarrantGrantedToAcorn" name="PercentageOfCoreworxCurrentCommonStockOutstandingRepresentedByWarrantGrantedToAcorn" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn" name="PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_PercentageOfDeductionOfCertainRepatriatedForeignEarnings" name="PercentageOfDeductionOfCertainRepatriatedForeignEarnings" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PercentageOfOutstandingSharesFromTotalOutstandingSharesAcquiredInBusinessAcquisition" name="PercentageOfOutstandingSharesFromTotalOutstandingSharesAcquiredInBusinessAcquisition" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_PeriodInMonthsOfServiceAdvancePaymentReceived" name="PeriodInMonthsOfServiceAdvancePaymentReceived" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PeriodInYearsOfWarrantyGrantedToCompanysProductsOrProjectsMaximum" name="PeriodInYearsOfWarrantyGrantedToCompanysProductsOrProjectsMaximum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PeriodOfBirdFoundationFunding" name="PeriodOfBirdFoundationFunding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_PeriodOfRepaymentsAxis" name="PeriodOfRepaymentsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_PeriodOfRepaymentsDomain" name="PeriodOfRepaymentsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PlacementAgentFee" name="PlacementAgentFee" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PotentialInvestmentAmountThroughExerciseOfAcornsOptionToInvestInUssi" name="PotentialInvestmentAmountThroughExerciseOfAcornsOptionToInvestInUssi" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_PowerGenerationMonitoringSegmentMember" name="PowerGenerationMonitoringSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_PreferredSharePurchaseUssiFuture" name="PreferredSharePurchaseUssiFuture" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_PreferredStockPurchaseUssi" name="PreferredStockPurchaseUssi" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_PreferredStockPurchaseUssiApril2012" name="PreferredStockPurchaseUssiApril2012" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_PrimeRate" name="PrimeRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale" name="ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale" name="ProceedsFromPaymentsForEscrowDepositFromCoalogixSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ProceedsFromSaleOfCoalogix" name="ProceedsFromSaleOfCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash" name="ProceedsFromSaleOfCoalogixNetOfCoalogixCash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ProceedsFromSaleOfInvesteeCompany" name="ProceedsFromSaleOfInvesteeCompany" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_ProceedsFromSaleOfInvesteeCompanyNetOfTaxesWithheld" name="ProceedsFromSaleOfInvesteeCompanyNetOfTaxesWithheld" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_ProceedsToBuyersFromSaleOf100OfCoalogix" name="ProceedsToBuyersFromSaleOf100OfCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_PropertyPlantAndEquipmentComputerHardwareAndSoftwareGross" name="PropertyPlantAndEquipmentComputerHardwareAndSoftwareGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_PropertyPlantAndEquipmentVehiclesGross" name="PropertyPlantAndEquipmentVehiclesGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_RegularDividendPaidPerShare" name="RegularDividendPaidPerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_RegularQuarterlyDividendDeclared" name="RegularQuarterlyDividendDeclared" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_RelatedPartyBalancesAndTransactionsAbstract" name="RelatedPartyBalancesAndTransactionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ReleaseOfEscrowDeposits" name="ReleaseOfEscrowDeposits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RemainingBalanceOfIndebtednessOwnedByCoreworxToParentCompanyAfterCertainDeductionAsStipulatedInSaleOfCoreworxAgreement" name="RemainingBalanceOfIndebtednessOwnedByCoreworxToParentCompanyAfterCertainDeductionAsStipulatedInSaleOfCoreworxAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_RemainingBalanceOfIndebtednessOwnedByCoreworxToParentCompanyPriorToSaleOfCoreworx" name="RemainingBalanceOfIndebtednessOwnedByCoreworxToParentCompanyPriorToSaleOfCoreworx" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_RemainingContractualTermWarrants" name="RemainingContractualTermWarrants" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_RepaymentOfGrantAmountOverRepaymentPeriodsPercentage" name="RepaymentOfGrantAmountOverRepaymentPeriodsPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="acfn_RepaymentPeriodFiveYearsMember" name="RepaymentPeriodFiveYearsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_RepaymentPeriodFourYearsMember" name="RepaymentPeriodFourYearsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_RepaymentPeriodThreeYearsMember" name="RepaymentPeriodThreeYearsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_RepaymentPeriodTwoYearsMember" name="RepaymentPeriodTwoYearsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ResearchAndDevelopmentArrangementBirdFoundationTotalGrant" name="ResearchAndDevelopmentArrangementBirdFoundationTotalGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RestrictedDepositCurrentWithRepectToGuarantees" name="RestrictedDepositCurrentWithRepectToGuarantees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_RevenuesAsiaBasedCustomers" name="RevenuesAsiaBasedCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesCustomersBasedInOtherGeographicLocations" name="RevenuesCustomersBasedInOtherGeographicLocations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesFromDiscontinuedOperationsTableTextBlock" name="RevenuesFromDiscontinuedOperationsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesGeneratedByCoalogixDuringApplicablePeriodAndPresentedInDiscontinuedOperations" name="RevenuesGeneratedByCoalogixDuringApplicablePeriodAndPresentedInDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesGeneratedByCoreworxDuringApplicablePeriodAndPresentedInDiscontinuedOperations" name="RevenuesGeneratedByCoreworxDuringApplicablePeriodAndPresentedInDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesIsraelBasedCustomers" name="RevenuesIsraelBasedCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesOceaniaBasedCustomers" name="RevenuesOceaniaBasedCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_RevenuesUnitedStatesCustomers" name="RevenuesUnitedStatesCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SaleOfCoalogixTextBlock" name="SaleOfCoalogixTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ScheduleOfCashlessNetExercisesAndCashExercisesTableTextBlock" name="ScheduleOfCashlessNetExercisesAndCashExercisesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ScheduleOfFinanceExpenseNetTableTextBlock" name="ScheduleOfFinanceExpenseNetTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ScheduleOfShareBasedCompensationSharesAuthorizedUnderDsitStockOptionPlansByExercisePriceRangeTableTextBlock" name="ScheduleOfShareBasedCompensationSharesAuthorizedUnderDsitStockOptionPlansByExercisePriceRangeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ScheduleOfShareBasedCompensationStockOptionsDsitActivityTableTextBlock" name="ScheduleOfShareBasedCompensationStockOptionsDsitActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ScheduleOfShareBasedCompensationStockOptionsUssiActivityTableTextBlock" name="ScheduleOfShareBasedCompensationStockOptionsUssiActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SegmentDepreciationAndAmortization" name="SegmentDepreciationAndAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SegmentGrossProfitLoss" name="SegmentGrossProfitLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SegmentNetIncomeLossBeforeIncomeTaxes" name="SegmentNetIncomeLossBeforeIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_SegmentReportingAndGeographicInformationAbstract" name="SegmentReportingAndGeographicInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SegmentShareBasedCompensationExpense" name="SegmentShareBasedCompensationExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SeveranceAssets" name="SeveranceAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_SeverancePayContributionsToDedicatedFunds" name="SeverancePayContributionsToDedicatedFunds" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SeverancePayContributionsToFundsExpectedInNextFiscalYear" name="SeverancePayContributionsToFundsExpectedInNextFiscalYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant2006DirectorPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant2006DirectorPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisablePeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisablePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberUssiOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodRelatedParties" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUssiOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodTotalDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodTotalDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodTotalUssiOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodTotalUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePriceTotalDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePriceTotalDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePriceTotalUssiOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePriceTotalUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodRelatedParties" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodRelatedParties" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldAtEndOfPeriodRelatedParties" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldAtEndOfPeriodRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNetExerciseInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNetExerciseInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberUssiOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceDsitOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceUssiOptionPlan" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSharesForfeitedInNetExerciseInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSharesForfeitedInNetExerciseInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSharesIssuedForNetExercisesInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSharesIssuedForNetExercisesInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesForCashInPeriod" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesForCashInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesForCashInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesForCashInPeriodWeightedAverageExercisePrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePriceDsitOptionPlan" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePriceDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePriceUssiOptionPlan" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePriceUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceDsitOptionPlan" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceInNisDsitOptionPlan" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceInNisDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsNetExercisesInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsNetExercisesInPeriodWeightedAverageExercisePrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseFromNonEmployeeGrantsInSellingGeneralAndAdministrativeExpense" name="ShareBasedCompensationExpenseFromNonEmployeeGrantsInSellingGeneralAndAdministrativeExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseInResearchAndDevelopmentExpense" name="ShareBasedCompensationExpenseInResearchAndDevelopmentExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpense" name="ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseDec2012OptionGrant" name="ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseDec2012OptionGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseJan2010OptionGrant" name="ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseJan2010OptionGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseJan2012OptionGrant" name="ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseJan2012OptionGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseOct2011OptionGrant" name="ShareBasedCompensationExpenseInSellingGeneralAndAdministrativeExpenseOct2011OptionGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseIncludedInLossFromDiscontinuedOperationsFromCoalogix" name="ShareBasedCompensationExpenseIncludedInLossFromDiscontinuedOperationsFromCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationExpenseIncludedInLossFromDiscontinuedOperationsFromCoreworx" name="ShareBasedCompensationExpenseIncludedInLossFromDiscontinuedOperationsFromCoreworx" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationGrantsToDirectorsAndOfficersTableTextBlock" name="ShareBasedCompensationGrantsToDirectorsAndOfficersTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceUssiOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExerciseableOptionsWeightedAverageRemainingContractualTermUssiOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExerciseableOptionsWeightedAverageRemainingContractualTermUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimitDsitOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimitDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsInitialContractualTermDsitOptions" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsInitialContractualTermDsitOptions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTermDsitOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTermDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTermUssiOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTermUssiOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimitDsitOptionPlan" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimitDsitOptionPlan" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationUssiSubsidiaryInGeneralAndAdministrativeExpense" name="ShareBasedCompensationUssiSubsidiaryInGeneralAndAdministrativeExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_ShareBasedCompensationUssiSubsidiaryInResearchAndDevelopmentExpense" name="ShareBasedCompensationUssiSubsidiaryInResearchAndDevelopmentExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SharesAvailableUnderDividendReinvestmentPlan" name="SharesAvailableUnderDividendReinvestmentPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SharesIssuedInAcquisitionOfGridsense" name="SharesIssuedInAcquisitionOfGridsense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SharesIssuedInAcquisitionOfGridsenseShares" name="SharesIssuedInAcquisitionOfGridsenseShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SharesIssuedInDecemberCapitalRaise" name="SharesIssuedInDecemberCapitalRaise" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue" name="SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SharesIssuedInMarchCapitalRaise" name="SharesIssuedInMarchCapitalRaise" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SpecialDividendDeclared" name="SpecialDividendDeclared" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SpecialDividendPaidPerShare" name="SpecialDividendPaidPerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_StateNetOperatingLossCarryforwardsSubjectToExpiration" name="StateNetOperatingLossCarryforwardsSubjectToExpiration" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_StateNetOperatingLossCarryforwardsThatAreNotSubjectToExpirationDate" name="StateNetOperatingLossCarryforwardsThatAreNotSubjectToExpirationDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_StockCompensationInUnallocatedExpenses" name="StockCompensationInUnallocatedExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_StockOptionCompensationOfSubsidiaries" name="StockOptionCompensationOfSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_SubsidiaryDefinitionMinimumPercentageOwnership" name="SubsidiaryDefinitionMinimumPercentageOwnership" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_SummaryOfSignificantAccountingPoliciesAbstract" name="SummaryOfSignificantAccountingPoliciesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_SummaryOfWarrantActivityTableTextBlock" name="SummaryOfWarrantActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_SummaryQuarterlyFinancialDataAbstract" name="SummaryQuarterlyFinancialDataAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxBenefitRecordedWithRespectToGainOnSaleOfCoalogix" name="TaxBenefitRecordedWithRespectToGainOnSaleOfCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxExpenseOnSaleOfCoalogix" name="TaxExpenseOnSaleOfCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateApplicableFor2009TaxableIncomeOfCompanysIsraeliSubsidiaries" name="TaxRateApplicableFor2009TaxableIncomeOfCompanysIsraeliSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateApplicableFor2010AndThereafterForTaxableIncomeOfCompanysIsraeliSubsidiaries" name="TaxRateApplicableFor2010AndThereafterForTaxableIncomeOfCompanysIsraeliSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2008TaxableIncome" name="TaxRateFor2008TaxableIncome" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2011ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" name="TaxRateFor2011ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2012AndThereafterForIsraeliSubsidiariesAsStipulatedInTaxationChapterInReportOfCommitteeOnSocialEconomicChangeAndAdoptedByGovernmentOfIsrael" name="TaxRateFor2012AndThereafterForIsraeliSubsidiariesAsStipulatedInTaxationChapterInReportOfCommitteeOnSocialEconomicChangeAndAdoptedByGovernmentOfIsrael" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2012ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" name="TaxRateFor2012ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2013ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" name="TaxRateFor2013ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2014ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" name="TaxRateFor2014ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2015ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" name="TaxRateFor2015ForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TaxRateFor2016AndThereafterForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" name="TaxRateFor2016AndThereafterForIsraeliSubsidiariesStipulatedInIsraelEconomicEfficiencyLaw" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ThisElementRepresentsApplicableAmountOfIncomeTaxesOrBenefitRealizedOnGainLossOnSaleOfInvestmentsOrOtherAssetsDuringReportingPeriod" name="ThisElementRepresentsApplicableAmountOfIncomeTaxesOrBenefitRealizedOnGainLossOnSaleOfInvestmentsOrOtherAssetsDuringReportingPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_TotalDividendPaidCashAndShares" name="TotalDividendPaidCashAndShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_TotalFederalNetOperatingLossCarryforward" name="TotalFederalNetOperatingLossCarryforward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_TotalForeignNetOperatingLossCarryforwards" name="TotalForeignNetOperatingLossCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_TotalGainOnSaleOfCoalogixBeforeTaxes" name="TotalGainOnSaleOfCoalogixBeforeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_TotalRevenuesFromDiscontinuedOperations" name="TotalRevenuesFromDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_TotalShareBasedCompensationUssiSubsidiary" name="TotalShareBasedCompensationUssiSubsidiary" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_TotalStateNetOperatingLossCarryforwards" name="TotalStateNetOperatingLossCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_TreasurySharesIssuedInAcquisition" name="TreasurySharesIssuedInAcquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_UnallocatedAssetsCorporateHeadquarters" name="UnallocatedAssetsCorporateHeadquarters" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_UnallocatedAssetsDsitHeadquarters" name="UnallocatedAssetsDsitHeadquarters" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_UnallocatedAssetsOmnimetrixHeadquarters" name="UnallocatedAssetsOmnimetrixHeadquarters" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_UnallocatedCorporateSegmentCosts" name="UnallocatedCorporateSegmentCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_UnallocatedSegmentCosts" name="UnallocatedSegmentCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="acfn_UnamortizedBalanceOfIntangibleAssetAcquiredByCoalogix" name="UnamortizedBalanceOfIntangibleAssetAcquiredByCoalogix" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_UssiAcquistionMember" name="UssiAcquistionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_UssiAmountBorrowed" name="UssiAmountBorrowed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_UssiOptionsExercisePricePerShare" name="UssiOptionsExercisePricePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_UssiOptionsGranted" name="UssiOptionsGranted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_UssiSegmentMember" name="UssiSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="acfn_UssiStockOptionPlanMember" name="UssiStockOptionPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_ValueOfCommonStockUsedToAcquireSharesOfSubsidiary" name="ValueOfCommonStockUsedToAcquireSharesOfSubsidiary" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="acfn_ValueOfEntitySharesIssuedInAcquisition" name="ValueOfEntitySharesIssuedInAcquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_VehiclesAccumulatedDepreciation" name="VehiclesAccumulatedDepreciation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="acfn_WarrantsForfeitedInCashlessExercise" name="WarrantsForfeitedInCashlessExercise" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WarrantsForfeitedOrExpired" name="WarrantsForfeitedOrExpired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WarrantsIssuedInCapitalRaise" name="WarrantsIssuedInCapitalRaise" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WeightedAverageEstimatedUsefulLifeInYearsOfAcquiredCustomerRelationships" name="WeightedAverageEstimatedUsefulLifeInYearsOfAcquiredCustomerRelationships" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_WeightedAverageEstimatedUsefulLifeInYearsOfAcquiredTechnology" name="WeightedAverageEstimatedUsefulLifeInYearsOfAcquiredTechnology" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_WeightedAverageExercisePriceCashlessExercise" name="WeightedAverageExercisePriceCashlessExercise" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WeightedAverageExercisePriceOfOptionsExercisedRelatedParties" name="WeightedAverageExercisePriceOfOptionsExercisedRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WeightedAverageExercisePriceOfOptionsForfeitedRelatedParties" name="WeightedAverageExercisePriceOfOptionsForfeitedRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WeightedAverageExercisePriceOfOptionsGrantedRelatedParties" name="WeightedAverageExercisePriceOfOptionsGrantedRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WeightedAverageExercisePriceOfOptionsHeldRelatedParties" name="WeightedAverageExercisePriceOfOptionsHeldRelatedParties" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="acfn_WeightedAverageExercisePriceOfWarrantsExercised" name="WeightedAverageExercisePriceOfWarrantsExercised" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="acfn_WorkingCapitalAdjustment" name="WorkingCapitalAdjustment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="acfn_WorkingCapitalEscrowDeposit" name="WorkingCapitalEscrowDeposit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>
