document

A market for trading forecasts: A wagering mechanism

Raja, A.A. (author), Pinson, Pierre (author), Kazempour, Jalal (author), Grammatico, S. (author)

In many areas of industry and society, including energy, healthcare, and logistics, agents collect vast amounts of data that are deemed proprietary. These data owners extract predictive information of varying quality and relevance from data depending on quantity, inherent information content, and their own technical expertise. Aggregating...

journal article 2024

document

Thermoelastic Stability of Deployable Space Telescopes

Villalba, Víctor (author)

Imagery collected from space provides very useful information about our planet. Today there are many Earth Observation satellites in orbit which allow us to collect information which is used for environmental monitoring, response to catastrophes, surveillance and security, urban planning, economic analysis and many other applications. Thus,...

doctoral thesis 2023

document

A Novel Aggregation Framework for the Efficient Integration of Distributed Energy Resources in the Smart Grid

Orfanoudakis, Stavros (author), Chalkiadakis, Georgios (author)

In this paper, we put forward a novel DER aggregation framework, encompassing a multiagent architecture and various types of mechanisms for the effective management and efficient integration of DERs in the Grid. One critical component of our architecture is the Local Flexibility Estimators (LFEs) agents, which are key for offloading the...

journal article 2023

document

Bone biopsy devices - a patent review

de Kater, E.P. (author), Boetzkes, Jos A. (author), Sakes, A. (author), Breedveld, P. (author)

Introduction: Bone biopsies have great value for the diagnosis of, amongst others, hematologic diseases. Although the bone biopsy procedure is mostly performed minimally invasive with the use of a slender cannula, the patient may still experience discomfort, especially when the procedure has to be repeated due to an unsuccessful biopsy. Areas...

review 2023

document

Fair Pricing for Time-Flexible Smart Energy Markets

Saur, R. (author), la Poutré, J.A. (author), Yorke-Smith, N. (author)

The adoption of new market mechanisms - vital to the better integration of flexible assets - depends on the fairness and nondiscrimination of the pricing rules. We consider a market setting with time-flexible unit energy buyers and sellers, that additionally submit their availability in time. The time-flexibility of the agents allows for...

journal article 2023

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Bilateral Peer-to-Peer Energy Trading via Coalitional Games

Raja, A.A. (author), Grammatico, S. (author)

In this article, we propose a bilateral peer-to-peer (P2P) energy trading scheme under single-contract and multi-contract market setups, both as an assignment game, a special class of coalitional games. The proposed market formulation allows for efficient computation of a market equilibrium while keeping the desired economic properties...

journal article 2023

document

Fair Mechanisms for Smart Grid Congestion Management

Hekkelman, B. (author)

We consider energy systems in the built environment. With the transition to a more sustainable, distributed, and 'smart' energy system, such local grids are undergoing significant changes. Among other developments, the new role of end-users as 'prosumers' - users that can either produce or consume power depending on the situation - is turning...

doctoral thesis 2022

document

Stiffness Compensation Through Matching Buckling Loads in a Compliant Four-Bar Mechanism

Numic, A. (author), Blad, Thijs (author), van Keulen, A. (author)

In this paper, a novel alternative method of stiffness compensation in buckled mechanisms is investigated. This method involves the use of critical load matching, i.e., matching the first two buckling loads of a mechanism. An analytical simply supported five-bar linkage model consisting of three rigid links, a prismatic slider joint, and four...

journal article 2022

document

A Flexure-Based Linear Guide With Torsion Reinforcement Structures

Rommers, J. (author), Naves, M. (author), Brouwer, D. M. (author), Herder, J.L. (author)

In this study, a flexure-based (compliant) linear guide with a motion range comparable to its footprint is presented. The design consists of two-folded leaf springs on which torsion reinforcement structures are added. Due to these structures, only two-folded leaf springs are needed instead of a minimum of five as in preexisting designs. The...

journal article 2022

document

Beyond the pedicle screw–a patent review

de Kater, E.P. (author), Sakes, A. (author), Edström, Erik (author), Elmi-Terander, Adrian (author), Kraan, Gerald (author), Breedveld, P. (author)

Purpose: This review provides an overview of the patent literature on posteriorly placed intrapedicular bone anchors. Conventional pedicle screws are the gold standard to create a fixation in the vertebra for spinal fusion surgery but may lack fixation strength, especially in osteoporotic bone. The ageing population demands new bone anchors...

review 2022

document

Whiffletree based supports for self-adjustable hydrostatic bearings

van Parijs, Vincent (author), Nijssen, J.P.A. (author), van Ostayen, R.A.J. (author)

Hydrostatic bearings are superior in terms of their friction and load carrying characteristics when compared to contact based bearings, but non-usable in applications with non-constant curvature counter surfaces. A possible solution to this limitation is the introduction of deformable hydrostatic bearings components that cope with these...

journal article 2021

document

Design of a 3D-printed hand prosthesis featuring articulated bio-inspired fingers

Cuellar Lopez, J.S. (author), Plettenburg, D.H. (author), Zadpoor, A.A. (author), Breedveld, P. (author), Smit, G. (author)

Various upper-limb prostheses have been designed for 3D printing but only a few of them are based on bio-inspired design principles and many anatomical details are not typically incorporated even though 3D printing offers advantages that facilitate the application of such design principles. We therefore aimed to apply a bio-inspired approach...

journal article 2021

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Compliant Mechanisms That Use Static Balancing to Achieve Dramatically Different States of Stiffness

Kuppens, P.R. (author), Bessa, M.A. (author), Herder, J.L. (author), Hopkins, J. B. (author)

Stiffness in compliant mechanisms can be dramatically altered and even eliminated entirely by using static balancing. This requires elastic energy to be inserted before operation, which is most often done with an additional device or preloading assembly. Adding such devices contrasts starkly with primary motivations for using compliant...

journal article 2021

document

Collective Decision Making through Self-regulation: Mechanisms and Algorithms for Self-regulation in Decision-Theoretic Planning

Scharpff, J.C.D. (author)

This thesis explores the potential of self-regulation in collective decision making to align interests and optimise joint performance. Demonstrated in the domain of road maintenance planning, this research contributes novel incentive mechanisms and algorithmic techniques to incite self-regulation and coordinate agent interactions, paired with a...

doctoral thesis 2020

document

Statistical reprogramming of macroscopic self-assembly with dynamic boundaries

Culha, Utku (author), Davidson, Zoey (author), Mastrangeli, Massimo (author), Sitti, Metin (author)

Self-assembly is a ubiquitous process that can generate complex and functional structures via local interactions among a large set of simpler components. The ability to program the self-assembly pathway of component sets elucidates fundamental physics and enables alternative competitive fabrication technologies. Reprogrammability offers further...

journal article 2020

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Mechanical design of dynamic hand orthoses: Expanding technology with comprehensive overviews and alternative pathways

Bos, R.A. (author)

Orthoses have evolved from simply maintaining bone fractures and correcting spinal deformities to full mechatronic systems that can read a person’s intention and translate that into a desired motion or force path. A vast variety in pathologies (e.g., stroke, muscular dystrophies), applications (e.g., daily assistance, research) and environments ...

doctoral thesis 2019

document

Combined Heat and Power Markets by Double-Sided Auction Mechanisms

Saur, R. (author), Yorke-Smith, N. (author), la Poutré, J.A. (author)

In order to reduce CO2 emissions, energy systems using different energy carriers (e.g., heat and power) are becoming more intertwined and integrated. However, coordination between non-cooperative participants of these systems in the combined heat and power domain has been limited to single-sided auctions with one centralised seller. In this...

conference paper 2019

document

Functional evaluation of a non-assembly 3D-printed hand prosthesis

Cuellar Lopez, J.S. (author), Smit, G. (author), Breedveld, P. (author), Zadpoor, A.A. (author), Plettenburg, D.H. (author)

In developing countries, the access of amputees to prosthetic devices is very limited. In a way to increase accessibility of prosthetic hands, we have recently developed a new approach for the design and 3D printing of non-assembly active hand prostheses using inexpensive 3D printers working on the basis of material extrusion technology. This...

journal article 2019

document

Forecast-based mechanisms for demand response

Methenitis, G. (author), Kaisers, Michael (author), la Poutré, J.A. (author)

We study mechanisms to incentivize demand response in smart energy systems. We assume agents that can respond (reduce their demand) with some probability if they prepare prior to the real-ization of the demand. Both preparation and response incur costs to agents. Previous work studies truthful mechanisms that select a minimal set of agents to...

conference paper 2019

document

Unparameterized optimization of the spring characteristic of parallel elastic actuators

van der Spaa, L.F. (author), Wolfslag, W.J. (author), Wisse, M. (author)

In electrically actuated robots most energy losses are due to the heating of the actuators. This energy loss can be greatly reduced with parallel elastic actuators, by optimizing the elastic element such that it delivers most of the required torques. Previously used optimization methods relied on parameterizing the spring characteristic,...

journal article 2019