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Giant magnetocaloric effect for (Mn, Fe, V)2(P, Si) alloys with low hysteresis

Lai, J. (author), Huang, B. (author), You, X. (author), Maschek, M. (author), Zhou, Guofu (author), van Dijk, N.H. (author), Brück, E.H. (author)

The Fe₂P type Mn–Fe–P–Si alloys exhibit a giant magneto-elastic first-order transition, but the large hysteresis limits their performance. Crystal structure evolution and magnetocaloric performance were investigated by varying the Mn and Fe contents at a constant V substitution of 0.02 in Fe₂P-type (Mn_1.17-xFe...

journal article 2024

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Using sky-classification to improve the short-term prediction of irradiance with sky images and convolutional neural networks

Martinez Lopez, V.A. (author), van Urk, G.A. (author), Doodkorte, P.J.F. (author), Zeman, M. (author), Isabella, O. (author), Ziar, H. (author)

Clouds moving in front or away from the sun are the leading cause of irradiance variability. These variations have a repercussion on the electricity production of photovoltaic systems. Predicting such changes is essential for proper control of these systems and for maintaining grid stability. Images from the sky have proven to help with short...

journal article 2024

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Multiplayer boycotts in convex games

Fokkink, R.J. (author), de Munnik, J.C. (author)

We extend the notion of boycotts between players in cooperative games to boycotts between coalitions. We prove that convex games offer a proper setting for studying these games. Boycotts have a heterogeneous effect. Individual players that are targeted by many-on-one boycotts suffer most, while non-participating players may actually benefit...

journal article 2024

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Optimal parameter estimation of shaped phase objects

Villegas, Arturo (author), Passos, M. H.M. (author), Pereira, S.F. (author), Torres, J. (author)

We show a general method to estimate with optimum precision, i.e., the best precision determined by the light-matter interaction process, a set of parameters that characterize a phase object. The method is derived from ideas presented by Pezze et al. [Phys. Rev. Lett. 119, 130504 (2017)0031-900710.1103/PhysRevLett.119.130504]. Our goal is to...

journal article 2024

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Optimal Survival Trees: A Dynamic Programming Approach

Huisman, T. (author), van der Linden, J.G.M. (author), Demirović, E. (author)

Survival analysis studies and predicts the time of death, or other singular unrepeated events, based on historical data, while the true time of death for some instances is unknown. Survival trees enable the discovery of complex nonlinear relations in a compact human comprehensible model, by recursively splitting the population and predicting...

conference paper 2024

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A Highly Linear Temperature Sensor Operating up to 600°C in a 4H-SiC CMOS Technology

Mo, J. (author), LI, J. (author), Zhang, Y. (author), Romijn, J. (author), May, Alexander (author), Erlbacher, Tobias (author), Zhang, Kouchi (author), Vollebregt, S. (author)

In this work, a highly linear temperature sensor based on a silicon carbide (SiC) p-n diode is presented. Under a constant current biasing, the diode has an excellent linear response to the temperature (from room temperature to 600°C). The best linearity (coefficient of determination ${R}^{{2}}$ = 99.98%) is achieved when the current density...

journal article 2023

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A 0.01 mm²10MHz RC Frequency Reference with a 1-Point On-Chip-Trimmed Inaccuracy of ±0.28% from -45°C to 125°C in 0.18μm CMOS

An, X. (author), Pan, S. (author), Jiang, H. (author), Makinwa, K.A.A. (author)

CMOS frequency references based on RC oscillators are usually preferred over bulky crystals in loT applications [1-5]. However, due to the process spread and finite temperature coefficient (TC) of most on-chip resistors, RC oscillators require trimming and temperature compensation to achieve decent accuracy. Enabled by high-resolution...

conference paper 2023

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On the equivalence of OSDM and OTFS

van der Werf, I. (author), Dol, H. S. (author), Blom, K. (author), Heusdens, R. (author), Hendriks, R.C. (author), Leus, G.J.T. (author)

In this paper, we show the mathematical equivalence of two popular modulation schemes: OSDM and OTFS. The former is mainly used in underwater acoustic communications, while the latter scheme is a promising modulation technique in radio-frequency communications. Although literature suggests a link between the two modulation schemes by connecting...

journal article 2023

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How to Operate a Meta-Telescope in your Spare Time

Wagner, Daniel (author), Ranadive, Sahil Ashish (author), Griffioen, H.J. (author), Kallitsis, Michalis (author), Dainotti, Alberto (author), Smaragdakis, G. (author), Feldmann, Anja (author)

Unsolicited traffic sent to advertised network space that does not host active services provides insights about misconfigurations as well as potentially malicious activities, including the spread of Botnets, DDoS campaigns, and exploitation of vulnerabilities. Network telescopes have been used for many years to monitor such unsolicited traffic....

conference paper 2023

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Strategies for realizing high-efficiency silicon heterojunction solar cells

Zhao, Y. (author), Procel Moya, P.A. (author), Han, C. (author), Cao, L. (author), Yang, G. (author), Özkol, E. (author), Alcañiz, Alba (author), Kovačević, K. (author), Limodio, G. (author), Santbergen, R. (author), Smets, A.H.M. (author), Weeber, A.W. (author), Zeman, M. (author), Mazzarella, L. (author), Isabella, O. (author)

Silicon heterojunction (SHJ) solar cells have achieved a record efficiency of 26.81% in a front/back-contacted (FBC) configuration. Moreover, thanks to their advantageous high V_OC and good infrared response, SHJ solar cells can be further combined with wide bandgap perovskite cells forming tandem devices to enable efficiencies well...

journal article 2023

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A Cryo-CMOS DAC-based 40 Gb/s PAM4 Wireline Transmitter for Quantum Computing Applications

Fakkel, N.E. (author), Mortazavi, S.M. (author), Overwater, R.W.J. (author), Sebastiano, F. (author), Babaie, M. (author)

State-of-the-art quantum computers already comprise hundreds of cryogenic quantum bits (qubits), and prototypes with over 10k qubits are currently being developed. Such large-scale systems require local cryogenic electronics for qubit control and readout, leaving the digital controllers for algorithm execution and quantum error correction ...

conference paper 2023

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A 115.1 TOPS/W, 12.1 TOPS/mm²Computation-in-Memory using Ring-Oscillator based ADC for Edge AI

Singh, A. (author), Bishnoi, R.K. (author), Kaichouhi, A. (author), Diware, S.S. (author), Joshi, R.V. (author), Hamdioui, S. (author)

Analog computation-in-memory (CIM) architecture alleviates massive data movement between the memory and the processor, thus promising great prospects to accelerate certain computational tasks in an energy-efficient manner. However, data converters involved in these architectures typically achieve the required computing accuracy at the expense...

conference paper 2023

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Non-fatal traffic crashes among food delivery riders in Vietnam: What is the problem?

Nguyen, M. (author), Nguyen-Phuoc, Duy Quy (author), Oviedo-Trespalacios, O. (author)

Objective: The rapid development of information technologies and the COVID-19 pandemic have resulted in the proliferation of online food shopping and food delivery motorcyclists. In contrast to the relatively ample literature on factors influencing fatalities and risky riding behaviors of food delivery motorcyclists, little is known about the...

journal article 2023

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ZVS-Optimized Constant and Variable Switching Frequency Modulation Schemes for Dual Active Bridge Converters

Lyu, D. (author), Straathof, C.A. (author), Soeiro, Thiago B. (author), Qin, Z. (author), Bauer, P. (author)

This paper proposes two modulation schemes for Dual Active Bridge (DAB) converters, with the aim of maximizing Zero Voltage Switching (ZVS) operation over a wide operational range. The first is a ZVS-optimized constant frequency modulation scheme, constructed based on the boundary conditions of ZVS operation. This scheme maximizes the number...

journal article 2023

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Copper Nanoparticle Sintering Enabled Hermetic Packaging With Fine Sealing Ring for MEMS Application

Hu, D. (author), Shah, M.B. (author), Fan, J. (author), Vollebregt, S. (author), Zhang, Kouchi (author)

Driving by the increased demand for hermetic packaging in the more than Moore (MtM) roadmap, a Cu nanoparticle sintering-enabled hermetic sealing solution was developed with a small-size sealing ring. The developed technology simplifies microfabrication and requires less surface roughness using a sinterable Cu nanoparticle paste. A 50μm size...

journal article 2023

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Comprehensive Training and Evaluation on Deep Reinforcement Learning for Automated Driving in Various Simulated Driving Maneuvers

Dong, Y. (author), Datema, T. (author), Wassenaar, V. (author), van de Weg, J.J. (author), Kopar, C.T. (author), Suleman, H.I. (author)

Developing and testing automated driving models in the real world might be challenging and even dangerous, while simulation can help with this, especially for challenging maneuvers. Deep reinforcement learning (DRL) has the potential to tackle complex decision-making and controlling tasks through learning and interacting with the environment,...

conference paper 2023

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Device Aware Diagnosis for Unique Defects in STT-MRAMs

Aouichi, A. (author), Yuan, S. (author), Fieback, M. (author), Rao, Siddharth (author), Kim, Woojin (author), Marinissen, Erik Jan (author), Couet, Sebastien (author), Taouil, M. (author), Hamdioui, S. (author)

Spin-Transfer Torque Magnetic RAMs (STT-MRAMs) are on their way to commercialization. However, obtaining high-quality test and diagnosis solutions for STT-MRAMs is challenging due to the existence of unique defects in Magnetic Tunneling Junctions (MTJs). Recently, the Device-Aware Test (DA-Test) method has been put forward as an effective...

conference paper 2023

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Searching for the Whole Truth: Harnessing the Power of Intellectual Humility to Boost Better Search on Debated Topics

Rieger, A. (author), Bredius, F. (author), Tintarev, N. (author), Pera, M.S. (author)

We often use search engines when seeking information for opinion-forming and decision-making on debated topics. However, searching for resources on debated topics to gain well-rounded knowledge is cognitively demanding, leaving us vulnerable to cognitive biases, such as confirmation bias. This can impede well-informed decision-making, and on...

conference paper 2023

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Dual Active Bridge Converter With Variable Switching Frequency Modulation to Maintain ZVS

Lyu, D. (author), Straathof, C.A. (author), Soeiro, Thiago B. (author), Qin, Z. (author), Bauer, P. (author)

A variable switching frequency modulation for the Dual Active Bridge (DAB) converter is proposed in this paper. With this variable switching frequency modulation, the DAB converter can be operated in the ZVS-beneficial operational modes without the necessity to transition to others, thus a larger ZVS range for the DAB converter can be...

conference paper 2023

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Comparison of Modular Multilevel Converter Based Solid State Transformer for AC/DC Application

Li, Z. (author), Qin, Z. (author), Mirzadarani, R. (author), Ghaffarian Niasar, M. (author), Itraj, M.S. (author), Van Lieshout, Lou (author), Bauer, P. (author)

For electrolyzer applications, traditional solutions using line frequency transformers plus rectifiers are bulky, heavy and have low controllability. The Solid State Transformer (SST) could be a promising solution to solve the mentioned issues. This paper compares the semiconductor ratings and capacitance of five different Modular Multilevel...

conference paper 2023