Results 71 to 80 of about 121,900 (274)

Mapping Causal Biology: Mendelian Randomization in the Era of Big Data

Med Research, EarlyView.
Mendelian randomization (MR) leverages genetic variants to mitigate confounding biases in causal inference. This review systematically maps MR's methodological evolution, highlights its expanding applications in epidemiology and drug target validation, and outlines future directions for overcoming current biases through dynamic, multi‐omics, and cross ...
Xuanlu Shen, Chunrun Qu, Zeyu Wang, Jinglin Zhou, Hongwei Liu, Yingjie Li, Bowei Liu, Hao Zhang, Nan Zhang, Jingwei Zhang, Quan Cheng   +10 more
wiley   +1 more source

Structural Identifiability and Reliability Assessment of a Nonidentical Cold-Standby System Subject to Progressive Degradation and Imperfect Switching

Journal of Applied Mathematics
In safety-critical systems, the assumption of identical components often leads to an overestimation of reliability. This study develops a detailed continuous-time Markov chain (CTMC) model for a complex three-unit, nonidentical cold-standby system.
Nawres R. Neamah, Alaa F. Mahdi, Layla Hindi, Hussein K. Asker   +3 more
doaj   +1 more source

Genetic Algorithm and Simulated Annealing for Redundancy Allocation Problem with Cold-standby Strategy [PDF]

Journal of Optimization in Industrial Engineering, 2011
This paper presents a new mathematical model for a redundancyallocation problem (RAP) withcold-standby redundancy strategy and multiple component choices.The applications of the proposed model arecommon in electrical power, transformation ...
Aida Karimi, Mani Sharifi, Amirhossain Chambari   +2 more
doaj  

Asynchronous population trends stabilize mesopredatory coral reef fish communities in the face of global change

Oikos, EarlyView.
Biodiversity can underpin stability in communities, allowing them to withstand environmental fluctuations without changes in aggregate properties like total abundance or biomass. We investigated the influence of biodiversity on two crucial population‐level mechanisms governing abundance stability in mesopredatory coral reef fishes: 1) ‘community ...
Rucha Karkarey, Eva Maire, Nicholas A. J. Graham, Valeriano Parravicini, Simon. J. Brandl, Jeremy Carlot, Mehdi Adjeroud, Rohan Arthur, Teresa Alcoverro, Shaun. K. Wilson, Jordan Goetze, Thomas H. Holmes, Julien Wickel, Dan. A. Exton, Sally A. Keith   +14 more
wiley   +1 more source

Optimization Method for Reliability–Redundancy Allocation Problem in Large Hybrid Binary Systems

Mathematics
This paper addresses a well-known research topic in the design of complex systems, specifically within the class of reliability optimization problems (ROPs).
Florin Leon, Petru Cașcaval
doaj   +1 more source

Bayesian zero-failure reliability demonstration [PDF]

, 2005
We study required numbers of tasks to be tested for a technical system, including systems with built-in redundancy, in order to demonstrate its reliability with regard to its use in a process after testing, where the system has to function for different ...
Rahrouh, Maha
core  

Patterns and environmental drivers of root traits across hydrological gradients in old growth boreal forests

Oikos, EarlyView.
Many key ecosystem functions are affected by plant roots and their traits. However, understanding of the patterns in, and drivers of, root traits lags far behind equivalent knowledge of above‐ground tissues, particularly in boreal old growth forests. We surveyed community‐level root traits across 11 old growth forests spanning a wide latitudinal range ...
Naomi Vöhringer, Hanna Axén, Anders Ahlström, Gesche Blume‐Werry, Daniel B. Metcalfe   +4 more
wiley   +1 more source

Reliable speed control of a permanent magnet DC motor using fault-tolerant H-bridge

Advances in Mechanical Engineering, 2020
Reliable, smooth, and fault free speed control of a Permanent Magnet (PM) DC motor using an H-bridge is an important need for many industrial applications such as robotics, automotive, and process industry to improve the overall efficiency and ...
Soban Ahmed, Arslan Ahmed Amin, Zaeema Wajid, Faizan Ahmad   +3 more
doaj   +1 more source

Agricultural and environmental drivers of variation in the composition of food crops: A scoping review

PLANTS, PEOPLE, PLANET, EarlyView.
Agricultural management and environmental conditions influence the biochemical composition of food crops; however, the specific drivers of this variation remain insufficiently understood, despite their importance for climate change adaptation and human health.
Kat Morgan, Teresa Warne, Sahar Toulabi, Fangzhou Li, Amanda Birnbaum, Shawn Ehlers Cheang, Cheng‐Yu Weng, Warangkana Srichamnong, Simab Kanwal, Linda Nana Esi Aduku, Charles Apprey, Kifle Habte Balcha, Herman Erick Lutterodt, Madeleine McGuinness, Bo Wallace, Layla Manoochehri, Alex C. McAlvay, Mary Ann Nunoo, Pearl Boamah Agyekum, Reginald A. Annan, Charlene van Buiten, Mariana Barboza, John de la Parra, Selena Ahmed, Sarah Brinkley   +24 more
wiley   +1 more source

Design and Implementation of Microcomputer-Based Redundant Excitation Control for Diesel Locomotive

Kongzhi Yu Xinxi Jishu
Some diesel locomotives exported from China operate continuously for prolonged periods, have extended rescue cycles, suffer significant consequences when faults occur, and rely on non-redundant control systems due to cost constraints.
LIU Chenyong, ZHANG Dongfang, BAO Rui, XU Qing, LI Junxiang, HUANG Lihui   +5 more
doaj