Results 101 to 110 of about 110,244 (159)
Traps, Tail States and Their Consequences on the Open‐circuit Voltage in Organic Solar Cells
It is found that the light‐intensity dependent low‐temperature roll‐off of open‐circuit voltage in organic solar cells is explained by the intrinsic disorder in these devices, which can be either described by the full Gaussian density of states or approximated by a two‐level system, which allows for a more intuitive interpretation.
Tobias Krebs+2 more
wiley +1 more source
King and Cochrane: The technological treadmill and racial inequity in US agriculture
Abstract Between 1920 and 1969, the number of Black farmers in the US decreased from 14% of all operators to 4%. Using Martin Luther King Jr.'s critique of agricultural policy and Willard Cochrane's theory of the technological treadmill, we explore how racial discrimination was linked to policies that led to structural change in US agriculture.
Jared Hutchins, Jacopo De Marinis
wiley +1 more source
Ammonia decomposition is a critical process for the production of COx‐free hydrogen, which is essential for the sustainable energy solutions. This review discusses Co‐based catalysts for ammonia decomposition, categorizing them into supported and unsupported catalysts.
Sujin Kim+5 more
wiley +1 more source
Hydrogen is an energy carrier, produced from renewable and nonrenewable resources. It can be stored in a variety of materials and transported to distant locations. This article reviews progress in hydrogen technology by looking at environmental and economic impact, cost analysis, and policy support at government level as way forward for bringing it to ...
Xuexue Pan+5 more
wiley +1 more source
Model‐based fault diagnosis in closed‐loop safety‐critical chemical reactors: An experimental study
Abstract This experimental study investigates fault detection and estimation in a continuous stirred‐tank reactor (CSTR) system under closed‐loop feedback control, including an analysis of different manipulative inputs for temperature regulation. A novel fault diagnosis approach is proposed, combining residual signal analysis and T2 statistic for real ...
Pu Du, Benjamin Wilhite, Costas Kravaris
wiley +1 more source
Novel approach to modeling ultra‐low temperature frost formation using Computational Fluid Dynamics
Abstract This study presents the development of a computational fluid dynamics model for predicting ultra‐low temperatures (less than −100°C). The frost formation rate was characterized using dimensionless numbers derived from operating conditions. To better capture the underlying physical phenomena of ultra‐low temperature frosting, various physical ...
Joshua Chang Qai Wong+4 more
wiley +1 more source
For safe human–robot collaboration (HRC), a protective and collision‐sensitive robot skin is proposed. The developed robot skin, named Gel‐Skin, is composed of polyvinyl chloride (PVC) gel, which is a functional material with impact absorption capability and tunable piezoresistive characteristics based on electrical charge‐accumulation.
Geonwoo Hwang+4 more
wiley +1 more source
Bubbles Acting as Micro End‐Effectors for Dexterous Manipulation and Sensing in Aqueous Environment
Inspired by bubbles, this article proposes a low‐cost method for multifunctional manipulation and sensing using microbubbles in aqueous environments. Bubbles are easily generated in situ, enabling the safe and adaptive handling of microobjects and sensing of microforces and surface textures.
Zichen Xu, Qingsong Xu
wiley +1 more source
This study presents a soft pneumatic pressure regulation system that uses self‐excited hose oscillations to convert constant pressure (90–150 kPa) into rhythmic output. Simulations and experiments demonstrate tunable oscillation frequencies (5.9–11.1 Hz) through adjustments in pressure, hose length, and jet hole diameter.
Fenglin Han+6 more
wiley +1 more source
ABSTRACT We analyzed 193 Fanconi anemia patients from the Italian Registry, focusing on hematological outcome, cancer risk, and mortality, both in transplanted (n = 130, 67.4% of the cohort) and non‐transplanted (n = 63, 36.6% of the cohort) patients. After a median follow‐up of 7 years, almost all patients developed cytopenia that was more frequent in
Erica Ricci+35 more
wiley +1 more source