Design, Production and Management

Research Output 1979 2019

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Conference contribution
2019
1 Citation (Scopus)

A Meta-Model to Connect Model-based Systems Engineering with Product Data Management by Dint of the Blockchain

Heber, D. T. & Groll, M. W., 8 May 2019, 2018 International Conference on Intelligent Systems (IS). Martins, J., Jotsov, V., Bierwolf, R., Mendonca, J. P., Jardim-Goncalves, R. & Marques, M. (eds.). IEEE, p. 280-287 8 p. 8710527

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Systems engineering
Information management
Pulse width modulation
Electronic equipment
16 Downloads (Pure)

A New Adaptive E-Learning Concept for Multidisciplinary Learning Environments

Loendersloot, R. & Martinetti, A., 25 Jun 2019, Proceedings of the 15th International CDIO conference. 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
learning environment
learning
student
electronic learning
learning objective

Antifragility as a means to utilize uncertainty in product development decisions

de Lange, J., Lutters, E., Kennon, D. & Schutte, C. S. L., 30 Jan 2019, International Conference on Competitive Manufacturing (COMA 19) Proceedings. Dimitrov, D., Hagendorn-Hansen, D. & von Leipzig, K. (eds.). Stellenbosch, p. 450-455 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Product development
Uncertainty
Incomplete information
Evaluation
Requirements specification
1 Downloads (Pure)

A Systemic Approach for Safe Integration of Products and Systems

Rajabalinejad, M., 24 Mar 2019, PESARO 2019: The Ninth International Conference on Performance, Safety and Robustness in Complex Systems and Applications. Rajabalinejad, M. (ed.). Valencia, Spain: IARIA/Thinkmind, p. 28-32 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
1 Downloads (Pure)

How a Tangible User Interface Contributes to Desired Learning Outcomes of the Virtual River Serious Game

den Haan, R. J., van Dijk, J., Baart, F., van der Voort, M. & Hulscher, S., 1 Jan 2019, HCI in Games: First International Conference, HCI-Games 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26–31, 2019, Proceedings. Fang, X. (ed.). Cham: Springer, p. 288-306 19 p. (Lecture Notes in Computer Science; vol. 11595).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Tangible User Interface
Serious Games
User interfaces
Rivers
Game

Modelling integral risk assessment (MOIRA): Experiments on the Dutch railway departure process

Schuitemaker, K. & Bonnema, G. M., 4 Jul 2019, 2019 14th Annual Conference System of Systems Engineering, SoSE 2019. IEEE, p. 272-277 6 p. 8753828

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Risk assessment
Experiments
Surveying
8 Downloads (Pure)

Paradigm of Safety by Design

Rajabalinejad, M., 2019, International Cross-industry Safety Conference (ICSC) - European STAMP Workshop & Conference (ESWC) (ICSC-ESWC 2018). Karanikas, N., Chatzimichailidou, M. M. & Rejzek, M. (eds.). Amsterdam: MATEC Web of Conferences, Vol. 273. 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
1 Downloads (Pure)

Safe Integration for System of Systems: The Safety Cube Theory

Rajabalinejad, M., 2019, 2019 14th Annual Conference System of Systems Engineering (SoSE). Piscataway, NJ: IEEE, p. 323-327 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Robots
System of systems
82 Downloads (Pure)

State of the art of electric Mobility as a Service (eMaaS): an overview of ecosystems and system architectures

Reyes Garcia, J. R., Lenz, G., Haveman, S. P. & Bonnema, G. M., 22 May 2019, 32nd International Electric Vehicle Symposium (EVS32).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Ecosystems

Turmoil Behind the Automated Wheel: An Embodied Perspective on Current HMI Developments in Partially Automated Vehicles

Boelhouwer, A., van Dijk, J. & Martens, M. H., 1 Jan 2019, HCI in Mobility, Transport, and Automotive Systems: First International Conference, MobiTAS 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26-31, 2019, Proceedings. Krömker, H. (ed.). Cham: Springer, p. 3-25 23 p. (Lecture Notes in Computer Science; vol. 11596).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Wheel
Driver
Wheels
Railroad cars
Automation

Virtual dashboards in pilot production environments

Lutters, E., de Lange, J. & Damgrave, R. G. J., 30 Jan 2019, International Conference on Competitive Manufacturing (COMA 19) Proceedings. Dimitrov, D., Hagendorn-Hansen, D. & von Leipzig, K. (eds.). Stellenbosch, p. 22-27 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Decision making
Arsenals
Augmented reality
Remote control
Virtual reality
2018

Blended spaces: Collaborative work and computer supported learning and tools

Wendrich, R. E., 1 Jan 2018, 38th Computers and Information in Engineering Conference. American Society of Mechanical Engineers (ASME), Vol. 1B-2018.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Collaborative Work
Cooperative Design
User Modeling
Cellular telephone systems
Usability

Design Probes for People with Dementia

Garde, J. A., van der Voort, M. C. & Niedderer, K., 25 Jun 2018, Proceedings of DRS 2018. Design as a catalyst for change. Storni, C., Leahy, K., McMahon, M., Lloyd, P. & Bohemia, E. (eds.). p. 2607-2621 15 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
Data storage equipment

Emergent methods, methodologies, technologies and tools for design and engineering processes

Wendrich, R. E., 7 May 2018, Twelfth International Symposium on Tools and Methods of Competitive Engineering. Horvath, I. & Suarez, J. P. (eds.). 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Data storage equipment
18 Downloads (Pure)

Engineering change management from the viewpoint of corporate reputation

Honkisch, C. A., Pereira Pessoa, M. V. & Henseler, J., 2018, DS92: Proceedings of the DESIGN 2018 15th International Design Conference. Marjanovic, D., Pavkovic, N., Storga, M., Skec, S. & Bojcetic, N. (eds.). p. 589-600 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Corporate reputation
Change management
Process design
Management control
Management decisions
11 Downloads (Pure)

Evaluating flexibility values for congestion management in distribution networks within Dutch pilots

Fonteijn, R., van Amstel, M. S., Nguyen, P. H., Morren, J., Bonnema, G. M. & Slootweg, J. G., 2018, The 7th International Conference on Renewable Power Generation (RPG2018): 26-27 August 2018 , Copenhagen, Denmark. 6 p. 216

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Electric power distribution
Reinforcement
Electricity
Heating

Experimental Performance of a 3D-Printed Hybrid Heat Pipe-Thermosyphon for Cooling of Power Electronics

Wits, W. W. & Jafari, D., 27 Dec 2018, THERMINIC 2018 - 24th International Workshop on Thermal Investigations of ICs and Systems, Proceedings. IEEE, 8593314

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

thermosiphons
Thermosyphons
heat pipes
Heat pipes
Power electronics
1 Citation (Scopus)

Freeform-Optimized Shapes for Natural-Convection Cooling

Wits, W. W., Jafari, D., Jeggels, Y., Van De Velde, S., Jeggels, D. & Engelberts, N., 27 Dec 2018, THERMINIC 2018 - 24th International Workshop on Thermal Investigations of ICs and Systems, Proceedings. IEEE, 8593305

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

heat sinks
Heat sinks
Natural convection
free convection
Cooling

Head Sensitivity for Designing Bicycle Helmets with Improved Physical Comfort

Broekhuizen, R., De Rydt, T., Lutters, E., Klooster, R. T. & De Bruyne, G., Jun 2018, Advances in Ergonomics in Design: Proceedings of the AHFE 2018 International Conference on Ergonomics in Design, July 21-25, 2018, Loews Sapphire Falls Resort at Universal Studios, Orlando, Florida, USA. Rebelo, F. & Soares, M. M. (eds.). Cham: Springer, p. 14-19 6 p. (Advances in Intelligent Systems and Computing; vol. 777).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Bicycles
Skin
Accidents

How the Blockchain fosters E/E traceability for MBSE and PLM in distributed engineering collaboration

Heber, D. T. & Groll, M. W., 21 Nov 2018, 2018 IEEE International Conference on Technology Management, Operations and Decisions (ICTMOD) . IEEE, p. 125-130 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Systems engineering
Collaboration engineering
Product lifecycle management
Product data management
Traceability

Multiple Modalities, Sensoriums, Experiences in Blended Spaces with Toolness and Tools for Conceptual Design Engineering

Wendrich, R. E., 26 Aug 2018, ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Vol. Volume 1B: 38th Computers and Information in Engineering Conference. 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

stimulus
engineering
abstraction
experience
interaction

Performance evaluation of an additively manufactured freeform wick for heat pipe applications

Jafari, D., Wits, W. W. & Geurts, B. J., 14 Jun 2018, 19th International Heat Pipe Conference and 13th international heat pipe symphosium (IHPC-IHPS 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Heat pipes
Evaporation
Boiling liquids
Heat flux
Printing

Performance of A Remote Hybrid PV System Based on Real and Modelled Data in Indonesia

Kunaifi, K. & Reinders, A. H. M. E., 6 Nov 2018, 35th European Photovoltaic Solar Energy Conference and Exhibition. Munich: WIP-Munich, p. 2060 – 2065 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Hybrid systems
Monitoring
Temperature
54 Downloads (Pure)

Philosophy of Technology x Design: The Practical Turn

Eggink, W. & Dorrestijn, S., 25 Jun 2018, Proceedings of the Biannual Design Research Society Conference (DRS): Catalyst. Storni, C., Leahy, K., McMahon, M., Lloyd, P. & Bohemia, E. (eds.). Limerick: Design Research Society, p. 190-199 9 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Philosophy of Technology
Real Life
30 Downloads (Pure)

SUPPORTING PRODUCT DEVELOPMENT AT TECH STARTUPS WITH LEAN PRODUCT DEVELOPMENT: CHALLENGES AND OPPORTUNITIES

Van Der Braak, M., Jauregui Becker, J. M. & Pereira Pessoa, M. V., 2018, DS 92: Proceedings of the DESIGN 2018 15th International Design Conference. p. 691-702 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Product development
Industry
56 Downloads (Pure)

Supporting product development with a practical tool for applying the strategy of resource circulation

Toxopeus, M. E., van den Hout, N. B. & van Diepen, B. G. D., 1 Jan 2018, 25th CIRP Life Cycle Engineering (LCE) Conference: 30 April – 2 May 2018, Copenhagen, Denmark. Owsianiak, M., Bey, N., Ryberg, M., Hauschild, M. Z., Laurent, A., Leclrec, A., Niero, M., Dong, Y. & Olsen, S. I. (eds.). Elsevier, Vol. 69. p. 680-685 6 p. (Procedia CIRP; vol. 69).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Product development
Boiler circulation
Boilers
Engineers
Industry
9 Downloads (Pure)

System Integration: Challenges and Opportunities for Rail Transport

Rajabalinejad, M., 20 Jun 2018, 13th System of Systems Engineering Conference. IEEE

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Rails
Decomposition
Engineers
Testing
System of systems

Touch, touch, touch, sensorial cognitive skills sensitized through tactility and tangibility

Wendrich, R., 1 Jan 2018, 15th International Design Conference, DESIGN 2018. Marjanovic, D., Storga, M., Skec, S., Bojcetic, N. & Pavkovic, N. (eds.). The Design Society, Vol. 5. p. 2369-2380 12 p. (Proceedings International Design Conference (DESIGN); vol. 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

User interfaces
Tangible User Interface
Embodiment
Testing
Haptics

Traditional Learning vs Virtual Learning in maintenance operations thoughts and reflections from a safety perspective

Martinetti, A. & 't Hart, K., 2018, Prevention of Accident at Work. Bernatik, A., Kocurkova, L. & Jorgensen, K. (eds.). CRC Press/Balkema, p. 317-322 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Virtual reality
Testing
Industry
27 Downloads (Pure)

Virtual and mixed prototyping techniques and technologies for consumer product design within a blended learning design environment

Bordegoni, M., Ferrise, F., Wendrich, R. E. & Barone, S., 1 Jan 2018, DS 92: Proceedings of the DESIGN 2018 15th International Design Conference. The Design Society, p. 183-192 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Consumer products
Product design
Students
Industry
2017

An experimental study towards the practical application of closed-loop flat-plate pulsating heat pipes

Groeneveld, G., Van Gerner, H. J. & Wits, W. W., 21 Dec 2017, THERMINIC 2017 - 23rd International Workshop on Thermal Investigations of ICs and Systems. IEEE, p. 1-6 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Heat pipes
Flat Plate
Closed-loop
Experimental Study
Heat
2 Citations (Scopus)

An investigation of porous structure characteristics of heat pipes made by additive manufacturing

Jafari, D., Wits, W. W. & Geurts, B. J., 21 Dec 2017, THERMINIC 2017 - 23rd International Workshop on Thermal Investigations of ICs and Systems. IEEE, p. 1-7 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3D printers
Heat pipes
Effective Conductivity
Thermal Conductivity
Thermal conductivity
58 Downloads (Pure)

BIM uses for reversible building design

van den Berg, M. C. & Durmisevic, E., Oct 2017, Vital cities and reversible buildings: conference proceedings. Durmisevic, E. (ed.). Mostar: Sarajevo Green Design Foundation, 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Demolition
Takeoff
Construction industry
Planning

Blow Bits: Creative playgrounds, gamification and virtuosity with hybrid design tools and environments (HDTE)

Wendrich, R. E., 21 Aug 2017, Proceedings of the 21st International Conference on Engineering Design (ICED 17): Vol 8: Human Behaviour in Design. The Design Society, 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Communication
86 Downloads (Pure)

Challenging Architects in Education: the Smart Environments Integration Project

Bonnema, G. M., Jul 2017, INCOSE International Symposium. Wiley, Vol. 27. p. 72-86

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Education
Engineers
Students
Systems engineering
Systems analysis

Continuous maintenance performance improvement: A multiple case study on maintenance policy management

Wu, S. K. & Braaksma, A. J. J., 5 Jun 2017, Conference proceedings of the 24th annual EurOMA conference. p. 1-10 10 p. 42350

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Uncertainty

Could LEGO® Serious Play® be a useful technique for product co-design?

Garde, J. A. & van der Voort, M. C., 2017, Proceedings of DRS 2016. Design + Research + Society Future-Focused Thinking: 50 th Anniversary International Conference Brighton, UK, 27 – 30 June 2016.. Lloyd, P. & Bohemia, E. (eds.). Design Research Society, Vol. 5. p. 2045-2065

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

5 Citations (Scopus)

Designing for embodied being-in-The-world: Two cases, seven principles and one framework

van Dijk, J. & Hummels, C., 20 Mar 2017, TEI17: Proceedings of the 11th International Conference on Tangible, Embedded, and Embodied Interaction. New York, NY: Association for Computing Machinery (ACM), p. 47-56 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Lenses

Directives to support the design of changeable (I)PSS

Pereira Pessoa, M. V. & Jauregui Becker, J. M., 2017, Proceedings of the 21st International Conference on Engineering Design (ICED 17) : Vol 3: Product, Services and Systems Design, Vancouver, Canada, 21-25.08.2017. Maier, A., Skec, S., Kim, H., Kokkolaras, M., Oehmen, J., Fadel, G., Salustri, F. & Van der Loos, M. (eds.). The Design Society, p. 121-130 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Product Development
Value Function
Product development
Modular Design
Sustainability
97 Downloads (Pure)

ERTMS Challenges for a Safe and Interoperable European Railway System

Rajabalinejad, M. & Schuitemaker, K., 2017, PESARO 2017, The Seventh International Conference on Performance, Safety and Robustness in Complex Systems and Applications. IARIA/Thinkmind, p. 17-22

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Command and control systems
Deregulation
Interoperability
Rails
Specifications

Estimating the Technical Potential of Grid-Connected PV Systems in Indonesia: A Comparison of a Method Based on Open Access Data with a Method Based on GIS

Kunaifi, K. & Reinders, A. H. M. E., 2017, 33rd European Photovoltaic Solar Energy Conference and Exhibition: proceedings of the international conference held in Amsterdam, The Netherlands, 25 September - 29 September 2017. Smets, A. (ed.). p. 2652-2658

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Geographic information systems
Decision making

Evaluating a computational support tool for set-based configuration of production systems: Results from an industrial case

Unglert, J., Hoekstra, S. & Jauregui Becker, J. M., 27 Jul 2017, 12th System of Systems Engineering Conference, SoSE 2017. IEEE, 7994939

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Systems engineering
Cellular manufacturing
Systems analysis
Engineers
22 Downloads (Pure)

Increasing reuse potential by taking a whole life-cycle perspective on the dimensional coordination of building products

Beurskens, P. R. & Durmisevic, E., Oct 2017, Vital cities and reversible buildings: conference proceedings. Durmisevic, E. (ed.). Mostar: Sarajevo Green Design Foundation

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
35 Downloads (Pure)

On the Role of External Representations in Designing for Participatory Sensemaking

Jaasma, P., van Dijk, J., Frens, J. & Hummels, C., 18 Oct 2017, Proceedings of the Conference on Design and Semantics of Form and Movement - Sense and Sensitivity, DeSForM 2017. Alonso, M. B. & Ozcan, E. (eds.). IntechOpen, p. 281-295

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Scaffolds
Public works
Visualization
7 Downloads (Pure)

Resilient performance in maintenance operations: managing unexpected failures

Moerman, J-J., Braaksma, A. J. J. & van Dongen, L. A. M., 2017, EurOMA 2017 conference proceedings.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

File

Robust Unconventional Interaction Design and Hybrid Tool Environments for Design and Engineering Processes

Wendrich, R. E. & Kruiper, R., 6 Aug 2017, ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: Volume 1: 37th Computers and Information in Engineering Conference Cleveland, Ohio, USA, August 6–9, 2017. American Society of Mechanical Engineers (ASME), 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Human computer interaction
Forging
Decision making
Engineers
Experiments

Sensible Pathways for Sensorium-Gameness Integration and Embedment in Design Tools for Multi-Phase Iterative Creative Synthesis in Design and Engineering Processes

Wendrich, R. E., 6 Aug 2017, ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: Volume 1: 37th Computers and Information in Engineering Conference Cleveland, Ohio, USA, August 6–9, 2017. American Society of Mechanical Engineers (ASME), 19 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Sensors
User interfaces
Computer aided design
Costs
Cyber Physical System
1 Citation (Scopus)

Set Based PLM Implementation, a Modular Approach to PLM Process Knowledge, Management and Automation

Koomen, S. P., 2017, Product Lifecycle Management and the Industry of the Future: 14th IFIP WG 5.1 International Conference, PLM 2017, Seville, Spain, July 10-12, 2017, Revised Selected Papers. Ríos, J., Bernard, A., Bouras, A. & Foufou, S. (eds.). CHAM: Springer, Vol. 517. p. 3-12 10 p. https://doi.org/10.1007/978-3-319-72905-3_1

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Concurrent engineering
Knowledge management
Product development
Consolidation
Byproducts
5 Citations (Scopus)

SketchingDIS: Hand-drawn sketching in HCI

Lewis, M., van Dijk, J., Sturdee, M., Rasmussen, M. K., Alexander, J. & Hoang, T., 10 Jun 2017, DIS 2017 Companion: Proceedings of the 2017 ACM Conference on Designing Interactive Systems. Association for Computing Machinery (ACM), p. 356-359 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Human computer interaction
Managers
20 Downloads (Pure)

Systemic view on reuse potential of building elements, components and systems: comprehensive framework for assessing reuse potential of building elements

Durmisevic, E., Beurskens, P. R., Adrosevic, R. & Westerdijk, R., 23 Jun 2017, Hiser International Conference: Advances in recycling and management of construction and demolition waste. p. 275-280 6 p. 60

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Demolition
Economics
Natural resources
Construction industry
Linear systems