25 papers · ranked by Valyu relevance
Raziel Riemer, Amir Shapiro
Background Biomechanical energy harvesting from human motion presents a promising clean alternative to electrical power supplied by batteries for portable electronic devices and for computerized and motorized prosthetics. We present the theory of energy harvesting from the human body and describe the amount of energy…
Mingjun Ying, Dipankar Shakya, Hitesh Poddar, Theodore S. Rappaport
—In this paper, we expand upon a new metric called the Waste Factor (W), a mathematical framework used to evaluate power efficiency in cascaded communication systems, by accounting for power wasted in individual components along a cascade. We show that the derivation of the Waste Factor, a unifying metric for defining…
Paula Paramo-Balsa, Juan Manuel Roldan-Fernandez, Jorge Semião, Manuel Burgos-Payan + 1 more
'Manuel Burgos-Payan' 'Ruben Puche-Panadero'] Industry 4.0 (I4.0) represents a transformative approach, integrating technology, production methods, and information and communication technology to enhance industrial value creation. A central I4.0 goal in the energy domain is improving energy efficiency to boost…
Serguei Saavedra, Yuguang Yang, Christopher P. Kempes, Chengyi Long + 3 more
Understanding the selecting and generating forces operating across the self-organization of ecological systems is synonymous with understanding principles of life itself. Three prominent hypotheses in ecological research—Lotka’s Maximum Power Principle, Odum and Pinkerton’s Intermediate Efficiency Principle, and…
O. Kanhere, H. Poddar, Yizhou Xing, D. Shakya + 2 more
'Theodore S. Rappaport'] Abstract—Future wireless cellular networks will utilize millimeter-wave and sub-THz frequencies and deploy small-cell base stations to achieve data rates on the order of hundreds of gigabits per second per user. The move to sub-THz frequencies will require attention to sustainability and…
London, Justin
—Compared to conventional converters, a three-level buck-boost (3L-BB) converter offers higher efficiency, reduced switching losses, and increased power density. We design a 3L-BB converter given certain voltage and current specifications in PSIM. We simulate the circuit in PSIM and analyze the power, voltage, and…
Jan Kokert, Leonhard M. Reindl, Stefan J. Rupitsch, Nick Harris
DC/DC converters are the essential component of power management in applications such as self-powered systems. Their simulation plays an important role in the configuration, analysis and design. A major drawback is the lack of behavioral models for DC/DC converters for long-term simulations (days or months). Available…
Millad Ghane, Jeff Larkin, Larry Shi, Sunita Chandrasekaran + 1 more
'Margaret S. Cheung'] Abstract—Energy consumption has been a great deal of concern in recent years and developers need to take energy-efficiency into account when they design algorithms. Their design needs to be energy-efficient and low-power while it tries to achieve attainable performance provided by underlying…
Jan Kunz, Jiri Fialka, Stanislav Pikula, Petr Benes + 4 more
'Stanislav Klusacek' 'Zdenek Havranek' 'Amir H. Alavi'] Measuring the efficiency of piezo energy harvesters (PEHs) according to the definition constitutes a challenging task. The power consumption is often established in a simplified manner, by ignoring the mechanical losses and focusing exclusively on the mechanical…
Asfand Haroon, Hasan Erteza Gelani, Hira Tahir, Habib Ullah Manzoor + 1 more
'Hugh Cowley'] The new millennium witnessed an unanticipated escalation in the installation of rooftop solar panels, particularly due to the development of highly efficient power electronic converters (PECs). The ‘battle of currents’ between AC and DC, which settled in the favor of AC in the nineteenth century…
Brokoslaw Laschowski, Keaton A. Inkol, Alex Mihailidis, John McPhee
Backdriveable actuators with energy regeneration can improve the efficiency and extend the battery-powered operating times of robotic lower-limb exoskeletons by converting some of the otherwise dissipated energy during negative mechanical work into electrical energy. However, previous related studies have focused on…
Roeland T. Vos, Maarten F. Bobbert, Dinant A. Kistemaker
The in vivo mechanical efficiency of muscles has often been estimated during sub-maximal cycling. In this approach, it has implicitly been assumed that the average amount of positive mechanical muscle power equals the average mechanical power output, i.e., that no power is dissipated by muscles. Here, we investigated…
Kariana Moreno Sader, Sayandeep Biswas, Rob Jones, Marian Mennig + 2 more
This work presents a costing and emissions analysis of long-haul battery electric trucks (BETs) with overnight charging for the U.S. market. First, we compute the energy requirements of a long-haul truck for a 600-mile real-world driving range and perform battery sizing. The battery sizes are used along with a…
Authors not listed
In this study, an all-perovskite solar cell is proposed consists of MASnI3, CsSnI3 and MAGeI3 proposed to replace conventional expensive HTM, ETM. Several physical parameters of each layer (HTM, ETM and Absorber) of the proposed cell including thickness, doping density, defect density, electron affinity, temperature…
Hossein Madi, Tilman Schildhauer, EMANUELE MOIOLI
In this study, we conducted the conceptual design of a system aimed at delivering constant energy supply for a decarbonised urban mobility setting. To this scope, we designed two systems based on battery electrical vehicles (BEV) and fuel cell electric vehicles (FCEV). The supply is primarily provided by renewable…
Shuntaro Amano, Massimiliano Esposito, Elisabeth Kreidt, David A. Leigh + 2 more
Information is a physical quantity, the realisation of which transformed the physics of measurement and communication in the latter half of the 20th Century. However, the relationship and flow between information, energy and mechanics in chemical systems and mechanisms remains largely unexplored. Here we analyze a…
Thomas D. Schneider
Unlike the Carnot heat engine efficiency published in 1824, an isothermal efficiency derived from thermodynamics and information theory can be applied to biological systems. The original approach by Pierce and Cutler in 1959 to derive the isothermal efficiency equation came from Shannon’s channel capacity of 1949 and…
Brendan Cook, Jerrome Gazzano, Zeynep Gunay, Lucas Hiller + 3 more
'Sakshi Mahajan' 'Aynur Taskan' 'Samra Vilogorac'] The electric grid in the United States has been suffering from underinvestment for years, and now faces pressing challenges from rising demand and deteriorating infrastructure. High congestion levels in transmission lines are greatly reducing the efficiency of…
Farshid Salimijazi, Jaehwan Kim, Alexa Schmitz, Richard Grenville + 2 more
Electromicrobial production technologies (EMP) aim to combine renewable electricity and microbial metabolism. We have constructed molecular to reactor scale models of EMP systems using H_2_-oxidation and extracellular electron transfer (EET). We predict the electrical-to-biofuel conversion efficiency could rise to ≥…
Saeed Habibi, Ramin Rahimi, Pourya Shamsi, Mehdi Ferdowsi
— Direct Current (DC) power distribution has gained attention in the Residential Nanogrids (RNGs) due to the substantial increase in the number of roof-top Photovoltaic (PV) systems and internally DC appliances used in buildings. Using DC distribution improves the efficiency of the RNGs compared to AC distribution.…
Aiman Roslizar, M. A. Alghoul, B. Bakhtyar, Nilofar Asim + 1 more
Buildings are among the largest consumers of energy. Part of the energy is wasted due to the habits of users and equipment conditions. A solution to this problem is efficient energy usage. To this end, an energy audit can be conducted to assess the energy efficiency. This study aims to analyze the energy usage of a…
Stefan Diesing, Le Zhang, Eli Zysman-Colman, Ifor Samuel
Organic light-emitting diodes (OLEDs) are a revolutionary self-emitting display technology that has been successfully commercialized in mobile phones and TVs. The injected charges form both singlet and triplet excitons, and for high efficiency it is important to enable dark triplets to emit light. Currently materials…
Kamil Rzepka, Przemysław Skurowski, Błażej Adamczyk, Adam Pilśniak
Recent studies show that the reduction of costs becomes more important motivation for organizations [2]. As Green IT becomes more important for organizations, researches, that concerns reduction of the impact on the environment or even reduction of costs, are widely required. The payoff of efficient computer systems is…
Sterling Baird
Six technical criteria { cell-level specific energy, cell-level specific power, cycle life, affordability, safety, and storage characteristics { are defined and discussed as applied to six high-impact battery applications: Electric vehicles, renewable energy, consumer electronics, unmanned aerial vehicles (UAV)…
Dharik Mallapragada, Yury Dvorkin, Miguel Modestino, Daniel Esposito + 14 more
The chemical industry is a major source of economic productivity and employment globally and among the top 3 industrial sources of greenhouse gas (GHG) emissions, along with steel and cement. As global demand for chemical products continues to grow, there is an urgency to develop and deploy sustainable chemical…