| count | title | file |
|---|
| 250 | Book: System Architecting | SystemArchitectureBook.pdf |
| 208 | Paper: The Awakening of a System Architect | MaturityPaper.pdf |
| 187 | Paper: The Role and Task of the System Architect | RoleSystemArchitectPaper.pdf |
| 184 | Paper: What is a Process | WhatIsAProcessPaper.pdf |
| 137 | Book: Architectural reasoning explained | ArchitecturalReasoningBook.pdf |
| 134 | Paper: The System Architecture Process | SystemArchitectureProcessPaper.pdf |
| 134 | Slides: Roadmapping | RoadmappingSlides.pdf |
| 133 | Paper: Process Decomposition of a Business | ProcessDecompositionOfBusinessPaper.pdf |
| 113 | Paper: Roadmapping | RoadmappingPaper.pdf |
| 82 | Paper: The Product Creation Process | ProductCreationProcessPaper.pdf |
| 76 | Book: Supporting Processes for System Architecture | SupportingProcessesBook.pdf |
| 75 | Paper: Case Study: Medical Imaging; From Toolbox to product to Platform | MedicalImagingPaper.pdf |
| 68 | Paper: The Tense Relation between Architect and Manager | RelationArchitectManagerPaper.pdf |
| 68 | Book: ComposableArchitectures | ComposableArchitecturesBook.pdf |
| 66 | Book: CAFCR: A Multi-view Method for Embedded Systems Architecting; Balancing Genericity and Specificity (Thesis) | ThesisBook.pdf |
| 63 | Paper: The Importance of Feedback for Architecture | FeedbackPaper.pdf |
| 59 | Paper: Function Profiles; The sheep with 7 legs | FunctionProfilesPaper.pdf |
| 56 | Paper: Requirements | RequirementsPaper.pdf |
| 54 | Paper: System Architecture: The Silver Bullet? | TheSilverBulletPaper.pdf |
| 53 | Paper: How to present architecture issues to higher management | ArchitectManagementInteractionPaper.pdf |
| 51 | Slides: The System Architect; Meddler or Hero? | MeddlerOrSaviorSlides.pdf |
| 50 | Paper: Archipelago: Architecture | ArchipelagoPaper.pdf |
| 47 | Paper: Role of Software in Systems | RoleOfSoftwarePaper.pdf |
| 45 | Paper: Linux Visualization | LinuxVisualizationPaper.pdf |
| 45 | Book: Course Descriptions | CourseDescriptionsBook.pdf |
| 43 | allSlides: All lecture slides for SARCH | SARCHallSlides.pdf |
| 43 | Book: Human Measure and Architecting | HumanMeasureBook.pdf |
| 42 | Paper: Product Family Business Analysis and Definition | PFanalysisAndDefinitionPaper.pdf |
| 41 | Slides: What is a Process | WhatIsAProcessSlides.pdf |
| 41 | Slides: Process Decomposition of a Business | ProcessDecompositionOfBusinessSlides.pdf |
| 41 | Slides: Conceptual View | ConceptualViewSlides.pdf |
| 40 | Slides: Module 11, Human Resource Management | ModuleHRMSlides.pdf |
| 40 | Paper: Market Product Life Cycle Consequences for Architecting | MarketProductLifecyclePaper.pdf |
| 40 | Slides: Light Weight Architectures; The way of the future? | LightWeightArchitectingSlides.pdf |
| 40 | Paper: Product Families and Generic Aspects | GenericDevelopmentsPaper.pdf |
| 37 | Paper: Documentation Tools Requirements and Design | MyDocumentationToolsPaper.pdf |
| 35 | Paper: The role of roadmapping in the strategy process | RoadmappingInStrategyProcessPaper.pdf |
| 34 | Slides: Module 02, Role and Task | ModuleRoleAndTaskSlides.pdf |
| 34 | Slides: Opportunities and challenges in embedded systems | EmbeddedSystemsOpportunitiesSlides.pdf |
| 34 | Paper: Conceptual View | ConceptualViewPaper.pdf |
| 32 | Paper: The Gaudi Project | GaudiProjectPaper.pdf |
| 31 | Paper: Software Reuse; Caught between strategic importance and practical feasibility | SoftwareReusePaper.pdf |
| 31 | Slides: The role of roadmapping in the strategy process | RoadmappingInStrategyProcessSlides.pdf |
| 31 | Slides: How to present architecture issues to higher management | ArchitectManagementInteractionSlides.pdf |
| 30 | Paper: From the soft and fuzzy context to SMART engineering. | FromFuzzyToSmartPaper.pdf |
| 30 | Paper: Application View | ApplicationViewPaper.pdf |
| 29 | Slides: Product Family Business Analysis and Definition | PFanalysisAndDefinitionSlides.pdf |
| 29 | Paper: Light Weight Architectures; The way of the future? | LightWeightArchitectingPaper.pdf |
| 29 | Slides: The Waferstepper Challenge: Innovation and Reliability despite Complexity. | IRCwaferstepperSlides.pdf |
| 29 | Paper: How to appraise or assess an architect? | HowToAppraisePaper.pdf |
| 29 | Paper: Granularity of Documentation | DocumentationGranularityPaper.pdf |
| 28 | allSlides: All lecture slides OOTI requirements engineering | OOTIallSlides.pdf |
| 28 | Slides: Module 05, Roadmapping | ModuleRoadmappingSlides.pdf |
| 28 | Slides: Multi-view Architecting | MVillustrationSlides.pdf |
| 28 | Paper: Gaudí Documentation Tools Requirements and Design | GaudiDocumentationToolsReqPaper.pdf |
| 27 | Slides: Software Reuse; Caught between strategic importance and practical feasibility | SoftwareReuseSlides.pdf |
| 27 | Slides: The Product Creation Process | ProductCreationProcessSlides.pdf |
| 27 | Paper: Lecture Requirements Engineering for the OOTI curriculum | OOTIcoursePaper.pdf |
| 26 | Slides: The System Architecture Process | SystemArchitectureProcessSlides.pdf |
| 26 | Slides: Semiconductor Software Strategy | SemiconductorSoftwareStrategySlides.pdf |
| 26 | Slides: Case Study: Medical Imaging; From Toolbox to product to Platform | MedicalImagingSlides.pdf |
| 26 | Paper: Medical Imaging Workstation: CAF Views | MIviewsCAFPaper.pdf |
| 26 | Slides: The Importance of System Architecting for Development | ImportanceOfSAforDevelopmentSlides.pdf |
| 26 | Slides: Execution Architecture for Real-Time Systems by Ton Kostelijk | HardRealTimeExecArchSlides.pdf |
| 26 | Slides: Function Profiles; The sheep with 7 legs | FunctionProfilesSlides.pdf |
| 26 | allSlides: All lecture slides for ESA stakeholders | ESAallSlides.pdf |
| 25 | old EV document: From OO-Predevelopment to Product to Re-use; Philips Software Conference 1993 | swConference1993.pdf |
| 25 | Slides: Software Productivity for Consumer Appliances | SoftwareProductivitySlides.pdf |
| 25 | Paper: The Waferstepper Challenge: Innovation and Reliability despite Complexity. | IRCwaferstepperPaper.pdf |
| 24 | Paper: The System Architect; Meddler or Hero? | MeddlerOrSaviorPaper.pdf |
| 24 | Slides: Execution architecture concepts | ExecutionArchitectureConceptsSlides.pdf |
| 24 | Paper: Execution Architecture Soft Real Time design | EAsoftRealTimePaper.pdf |
| 24 | Paper: Exploration of the bloating of software | BloatingExploredPaper.pdf |
| 23 | Slides: Requirements | RequirementsSlides.pdf |
| 23 | Slides: The Awakening of a System Architect | MaturitySlides.pdf |
| 23 | Paper: Introduction to Medical Imaging Case Study | IntroductionMedicalImagingCasePaper.pdf |
| 23 | Slides: The Gaudi Project | GaudiProjectSlides.pdf |
| 23 | Slides: Communicating via CAFCR; illustrated by security example. | CommunicatingViaCAFCRSlides.pdf |
| 22 | Slides: A Collection of Viewpoints; position presentation | ViewCollectionSlides.pdf |
| 22 | Slides: Product Families and Generic Aspects | GenericDevelopmentsSlides.pdf |
| 22 | Slides: From Industrial Experience to System Architecting Know-how | FromIndustryToKnowHowSlides.pdf |
| 21 | Slides: Module 01, System Architecture Context | ModuleSystemArchitectureContextSlides.pdf |
| 21 | Slides: Module 04, System Architect Toolkit | ModuleSystemArchitectToolkitSlides.pdf |
| 21 | Slides: From the soft and fuzzy context to SMART engineering. | FromFuzzyToSmartSlides.pdf |
| 21 | Paper: Basic Working Methods of a System Architect | BasicWorkingMethodArchitectPaper.pdf |
| 21 | Paper: Research in Systems Architecting | ArchitectingResearchMethodPaper.pdf |
| 21 | Slides: Agile Organisation | AgileOrganisationSlides.pdf |
| 20 | Paper: Positioning the CAFCR Method in the World | PositioningArchitecturalReasoningPaper.pdf |
| 20 | Slides: Module 08, Role of Software | ModuleRoleOfSoftwareSlides.pdf |
| 20 | Slides: Module 09, Human Side | ModuleHumanSideSlides.pdf |
| 20 | Slides: Functional View | FunctionalViewSlides.pdf |
| 20 | Slides: Research in Systems Architecting | ArchitectingResearchMethodSlides.pdf |
| 19 | Paper: Story Telling | ThesisStoryPaper.pdf |
| 19 | Paper: Template How To | TemplateHowToPaper.pdf |
| 19 | allSlides: All lecture slides SARCH for management teams | ShortSARCHallSlides.pdf |
| 19 | Slides: The Role and Task of the System Architect | RoleSystemArchitectSlides.pdf |
| 19 | Slides: Medical Imaging Workstation: CAF Views | MIviewsCAFSlides.pdf |
| 19 | Slides: Light Weight Architectures revisited; The way of the future? | LightWeightArchitectingRevisitedSlides.pdf |
| 19 | Slides: Introduction to Medical Imaging Case Study | IntroductionMedicalImagingCaseSlides.pdf |
| 19 | Paper: An incremental execution architecture design approach | ExecutionArchitectureApproachPaper.pdf |
| 19 | Paper: From Legacy to State-of-the-art; Architectural Refactoring. | ArchitecturalRefactoringPaper.pdf |
| 18 | Paper: Basic Methods | ThesisBWMAPaper.pdf |
| 18 | Slides: The Importance of Feedback for Architecture | FeedbackSlides.pdf |
| 18 | Paper: Customer Objectives View | CustomerObjectivesViewPaper.pdf |
| 18 | Slides: From Legacy to State-of-the-art; Architectural Refactoring. | ArchitecturalRefactoringSlides.pdf |
| 17 | old EV document: Software Engineering Experiences from EasyVision; lecture at HIO (Computer Science Highschool) | hioLezing.pdf |
| 17 | Paper: Balancing Genericity and Specificity | GenericityVsSpecificityPaper.pdf |
| 17 | old EV document: OO experiences in Medical Workstation Products | CFTlezing.pdf |
| 17 | Paper: Architecture | BuildingBridgesPaper.pdf |
| 16 | Paper: Positioning the System Architecture Process | PositioningSystemArchitectureProcessPaper.pdf |
| 16 | Slides: Module 03, Requirements | ModuleRequirementsSlides.pdf |
| 16 | Paper: The Importance of System Architecting for Development | ImportanceOfSAforDevelopmentPaper.pdf |
| 16 | old EV document: HBOC lezing, 1996. | HBOClezing.pdf |
| 16 | Slides: Capability development at the Embedded Systems Institute | ESIcapabilitiesSlides.pdf |
| 16 | allSlides: Lecture slides for the course Execution Architecture | EAallSlides.pdf |
| 15 | Slides: Template How To | TemplateHowToSlides.pdf |
| 15 | Paper: From story to design illustrated by medical imaging | MIstoryToDesignPaper.pdf |
| 15 | Slides: Medical Imaging in Chronological Order | MIchronologicalSlides.pdf |
| 15 | Slides: How to appraise or assess an architect? | HowToAppraiseSlides.pdf |
| 15 | Paper: ESI/CTT course ESA | ESAcoursePaper.pdf |
| 15 | Paper: Communicating via CAFCR; illustrated by security example. | CommunicatingViaCAFCRPaper.pdf |
| 15 | Paper: Aggregation Levels | AggregationLevelsPaper.pdf |
| 14 | Slides: The Tense Relation between Architect and Manager | RelationArchitectManagerSlides.pdf |
| 14 | Paper: Reflection on Research Method to Study Architecting Methods | ReflectionOnResearchMethodPaper.pdf |
| 14 | Slides: Positioning the System Architecture Process | PositioningSystemArchitectureProcessSlides.pdf |
| 14 | Slides: Module 06, Product Families | ModuleProductFamiliesSlides.pdf |
| 14 | Paper: Story Telling in Medical Imaging | MIstoriesPaper.pdf |
| 14 | Paper: The Human Side of Systems Architecting | HumanSidePaper.pdf |
| 14 | Paper: Challenges in High-Tech, illustrated in the medical domain | DYOFPaper.pdf |
| 14 | Slides: Customer Objectives View | CustomerObjectivesViewSlides.pdf |
| 14 | Slides: Architectural Refactoring; illustrated by MR. | ArchitecturalRefactoringMRSlides.pdf |
| 14 | Slides: Architecting User Value: From Technical Engineering to Value Engineering | ArchitectingUserValueSlides.pdf |
| 13 | Paper: Sub methods in the CAF Views | TCAFsubMethodsPaper.pdf |
| 13 | Paper: Realization View | RealizationViewPaper.pdf |
| 13 | Slides: Lecture Requirements Engineering for the OOTI curriculum | OOTIcourseSlides.pdf |
| 13 | Paper: Threads of Reasoning in the Medical Imaging Case | MIthreadsOfReasoningPaper.pdf |
| 13 | Paper: Medical Imaging Workstation: CR Views | MIconceptualViewPaper.pdf |
| 13 | document: title unknown | InformatieArtikelNovember2003.pdf |
| 13 | Paper: Architecting for Humans; How to Transfer Experience? | ExperienceTransferPaper.pdf |
| 12 | Slides: Role of Software in Systems | RoleOfSoftwareSlides.pdf |
| 12 | : title unknown | PFBusinessAnalysisAndDefinitionPaper.pdf |
| 12 | Slides: Module 12, Execution Architecture approach and concepts | ModuleEAconceptsSlides.pdf |
| 12 | Slides: Market Product Life Cycle Consequences for Architecting | MarketProductLifecycleSlides.pdf |
| 12 | Slides: From story to design illustrated by medical imaging | MIstoryToDesignSlides.pdf |
| 12 | Slides: Medical Imaging Workstation: CR Views | MIconceptualViewSlides.pdf |
| 12 | Paper: Medical Imaging in Chronological Order | MIchronologicalPaper.pdf |
| 12 | Paper: Multi-view Architecting | IntegratingCAFCRPaper.pdf |
| 12 | Paper: Functional View | FunctionalViewPaper.pdf |
| 12 | Paper: Execution architecture concepts | ExecutionArchitectureConceptsPaper.pdf |
| 12 | document: title unknown | BitsEnChipsInterviewGerritMuller.pdf |
| 12 | Slides: Basic Working Methods of a System Architect | BasicWorkingMethodArchitectSlides.pdf |
| 12 | Paper: Architect and Human Measure; the integration role | ArchitectAndHumanMeasurePaper.pdf |
| 11 | old EV document: Technology Improvement Plan; internal presentation 1993 | evolution.pdf |
| 11 | Paper: Architecture; the building as a product. | WDCarchitectingPaper.pdf |
| 11 | Paper: Threads of Reasoning | ThreadsOfReasoningPaper.pdf |
| 11 | Slides: The Position of Research | PositionOfResearchSlides.pdf |
| 11 | Slides: MSARCH Module 00, Course Information and Gaudí Project | ModuleSSARCHinfoSlides.pdf |
| 11 | Slides: Measurement issues; From gathering numbers to gathering knowledge, by Ton Kostelijk | MeasurementExecArchSlides.pdf |
| 11 | Paper: The Future of Architecting Research | FutureOfArchitectingResearchPaper.pdf |
| 11 | Paper: Research Question and Hypothesis | CriterionsForArchitectingMethodsPaper.pdf |
| 10 | Slides: Basic Methods | ThesisBWMASlides.pdf |
| 10 | Paper: Sub methods in the CR Views | TCRsubMethodsPaper.pdf |
| 10 | Slides: Story How To | StoryHowToSlides.pdf |
| 10 | Paper: Story How To | StoryHowToPaper.pdf |
| 10 | Paper: Positioning Architecting Methods in the business | PositioningCAFCRinBusinessPaper.pdf |
| 10 | Paper: The Position of Research | PositionOfResearchPaper.pdf |
| 10 | : title unknown | MyDocumentationImplementationPaper.pdf |
| 10 | Paper: Capability development at the Embedded Systems Institute | ESIcapabilitiesPaper.pdf |
| 10 | Slides: Execution Architecture Soft Real Time design | EAsoftRealTimeSlides.pdf |
| 10 | Slides: Application View | ApplicationViewSlides.pdf |
| 9 | Slides: System Architecture: The Silver Bullet? | TheSilverBulletSlides.pdf |
| 9 | Paper: CTT course SARCH | SARCHcoursePaper.pdf |
| 9 | Paper: Qualities as Integrating Needles | QualityNeedlesPaper.pdf |
| 9 | Slides: Threads of reasoning illustrated by medical imaging case | PresentationMITORSlides.pdf |
| 9 | Book: Reader OOTI course requirements engineering | OOTIrequirementsBook.pdf |
| 9 | Slides: ESA Module 0, Course Information and Gaudí Project | ModuleESAinfoSlides.pdf |
| 9 | Slides: EA Module 0, Course Information Execution Architecture | ModuleEAinfoSlides.pdf |
| 9 | Slides: Story Telling in Medical Imaging | MIstoriesSlides.pdf |
| 9 | Slides: Multi-view Architecting | IntegratingCAFCRSlides.pdf |
| 9 | Paper: Course Execution Architecture | EAcoursePaper.pdf |
| 9 | Slides: Granularity of Documentation | DocumentationGranularitySlides.pdf |
| 9 | Slides: Exploration of the bloating of software | BloatingExploredSlides.pdf |
| 9 | Paper: Short introduction to basic ''CAFCR'' model | BasicCAFCRPaper.pdf |
| 9 | Slides: Overview of CAFCR and Threads of Reasoning | ArchitectingMethodOverviewSlides.pdf |
| 8 | old EV document: Philips SW conference 1995, SIG re-use | swConference1995.pdf |
| 8 | Slides: Architecture; the building as a product. | WDCarchitectingSlides.pdf |
| 8 | Slides: Multi-view Architecting | TheIndustreeDecember2000Slides.pdf |
| 8 | Slides: Reflection on Research Method to Study Architecting Methods | ReflectionOnResearchMethodSlides.pdf |
| 8 | Slides: SARCH Module 00, Course Information and Gaudí Project | ModuleSARCHinfoSlides.pdf |
| 8 | old EV document: Image quality with EasyVision; PMS Image Quality Seminar; June 20, 1996 | ImageQuality.pdf |
| 8 | Slides: Architecting for Humans; How to Transfer Experience? | ExperienceTransferSlides.pdf |
| 8 | Slides: Positioning Embedded Systems Initiatives | ESIpositioningSlides.pdf |
| 8 | Slides: ESI/CTT course ESA | ESAcourseSlides.pdf |
| 8 | Slides: Research Question and Hypothesis | CriterionsForArchitectingMethodsSlides.pdf |
| 8 | Slides: Aggregation Levels | AggregationLevelsSlides.pdf |
| 8 | Paper: Evaluation from a Wider Context | ARevaluationOtherPaper.pdf |
| 7 | old EV document: Historical overview of EasyVision products and applications. | history.pdf |
| 7 | old EV document: PMS workstation requirements 1993. | WorkstationRequirements1993.pdf |
| 7 | Paper: What is Systems Architecting in an Industrial Context? | WhatIsArchitectingPaper.pdf |
| 7 | Slides: Threads of Reasoning | ThreadsOfReasoningSlides.pdf |
| 7 | Paper: CTT course MSARCH System Architecting for Management Teams | ShortSARCHcoursePaper.pdf |
| 7 | Slides: Realization View | RealizationViewSlides.pdf |
| 7 | Slides: Documentation Tools Requirements and Design | MyDocumentationToolsSlides.pdf |
| 7 | Slides: Module 07, Supporting Processes | ModuleSupportingProcessesSlides.pdf |
| 7 | Slides: Threads of Reasoning in the Medical Imaging Case | MIthreadsOfReasoningSlides.pdf |
| 7 | Slides: Gaudí Web Site Requirements | GaudiWebSiteReqSlides.pdf |
| 7 | Slides: Gaudí Documentation Tools Requirements and Design | GaudiDocumentationToolsReqSlides.pdf |
| 7 | Slides: Architecture | BuildingBridgesSlides.pdf |
| 7 | Slides: Archipelago: Architecture | ArchipelagoSlides.pdf |
| 7 | Paper: Evaluation of the Architecting Method | ARevaluationPaper.pdf |
| 6 | old EV document: TUE lezing, 1996. | TUElezing.pdf |
| 6 | Paper: Semiconductor Software Strategy | SemiconductorSoftwareStrategyPaper.pdf |
| 6 | Slides: Positioning the CAFCR Method in the World | PositioningArchitecturalReasoningSlides.pdf |
| 6 | : title unknown | PFBusinessAnalysisAndDefinitionSlides.pdf |
| 6 | : title unknown | MyDocumentationImplementationSlides.pdf |
| 6 | Slides: The Human Side of Systems Architecting | HumanSideSlides.pdf |
| 6 | Slides: An incremental execution architecture design approach | ExecutionArchitectureApproachSlides.pdf |
| 6 | Slides: Short introduction to basic ''CAFCR'' model | BasicCAFCRSlides.pdf |
| 6 | Paper: Overview of CAFCR and Threads of Reasoning | ArchitectingMethodOverviewPaper.pdf |
| 6 | Slides: Evaluation of the Architecting Method | ARevaluationSlides.pdf |
| 5 | old EV document: Re-use in Workstation Products; Internal lecture at MR department September 1994 | mrlezing.pdf |
| 5 | Slides: From Techno-nerd to Stakeholder Representative | TechnonerdToStakeholderSlides.pdf |
| 5 | Slides: Role of Systems Architecting in Innovation | RoleInInnovationSlides.pdf |
| 5 | Slides: From Techno-nerd to Stakeholder Representative | DelftNovember2000Slides.pdf |
| 4 | Paper: Typical vs Worst Case | TypicalVsWorstCasePaper.pdf |
| 4 | Slides: CTT course SARCH | SARCHcourseSlides.pdf |
| 4 | Slides: Qualities as Integrating Needles | QualityNeedlesSlides.pdf |
| 4 | Slides: Positioning Architecting Methods in the business | PositioningCAFCRinBusinessSlides.pdf |
| 4 | Slides: SARCH Module 10, Wrap Up | ModuleSARCHwrapUpSlides.pdf |
| 4 | Slides: Linux Visualization | LinuxVisualizationSlides.pdf |
| 4 | Slides: Balancing Genericity and Specificity | GenericityVsSpecificitySlides.pdf |
| 4 | Paper: Gaudí Web Site Requirements | GaudiWebSiteReqPaper.pdf |
| 4 | Slides: Future of the ESA course | ESAfutureSlides.pdf |
| 4 | Slides: Challenges in High-Tech, illustrated in the medical domain | DYOFSlides.pdf |
| 3 | Slides: What is Systems Architecting in an Industrial Context? | WhatIsArchitectingSlides.pdf |
| 3 | Slides: Typical vs Worst Case | TypicalVsWorstCaseSlides.pdf |
| 3 | Slides: Story Telling | ThesisStorySlides.pdf |
| 3 | Slides: CTT course MSARCH System Architecting for Management Teams | ShortSARCHcourseSlides.pdf |
| 3 | Slides: Course Execution Architecture | EAcourseSlides.pdf |
| 3 | Slides: Architect and Human Measure; the integration role | ArchitectAndHumanMeasureSlides.pdf |
| 3 | Slides: Evaluation from a Wider Context | ARevaluationOtherSlides.pdf |
| 2 | Slides: Sub methods in the CR Views | TCRsubMethodsSlides.pdf |
| 2 | : title unknown | ScenarioHowToSlides.pdf |
| 2 | : title unknown | ScenarioHowToPaper.pdf |
| 2 | Slides: The Future of Architecting Research | FutureOfArchitectingResearchSlides.pdf |
| 1 | Slides: Sub methods in the CAF Views | TCAFsubMethodsSlides.pdf |
| 1 | Paper: Positioning Embedded Systems Initiatives | ESIpositioningPaper.pdf |