Results 81 to 90 of about 19,713 (246)

High-current density terahertz resonant runneling diodes grown by MOCVD

Dianzi Jishu Yingyong, 2019
AlAs/InGaAs/AlAs resonant tunneling materials was optimized, and terahertz resonant tunneling diodes grown by MOCVD is first fabricated. The epitaxial layers of the RTD were grown on semi-insulating InP substrate.
Che Xianghui, Liang Shixiong, Zhang Lisen, Gu Guodong, Hao Wenjia, Yang Dabao, Chen Hongtai, Feng Zhihong   +7 more
doaj   +1 more source

Patterns of Colorectal Cancer Diagnosis in Older Adults: A SEER‐Medicare Analysis of Health and Economic Impact of Missed Screening Opportunities

Journal of Surgical Oncology, EarlyView.
ABSTRACT Objective To assess how diagnostic pathways affect clinical outcomes and healthcare costs among older adults diagnosed with colorectal cancer (CRC). Summary of Background Data Many CRC cases in the United State are diagnosed during an emergency presentation, which have been linked to worse outcomes.
Eshetu B. Worku, Selamawit A. Woldesenbet, Odysseas P. Chatzipanagiotou, Timothy M. Pawlik   +3 more
wiley   +1 more source

Habitat loss reshuffles ecological and evolutionary interactions in a seed dispersal network

Oikos, EarlyView.
In tropical forests, habitat loss reshapes species composition, favoring generalists and recently emerged lineages while specialists and older evolutionary lineages are lost. However, how changes in species ecological attributes and evolutionary history affect ecological processes is poorly explored.
Fernando César Gonçalves Bonfim, Mauro Galetti, Elaine Rios, Cynthia Oliveira, Milena Gama, Ketlen Bona, Geanne Carla Novais‐ Pereira, Thiago de Castro Ribeiro, Eliana Cazetta   +8 more
wiley   +1 more source

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

EX POST AND EX ANTE IMPACT ANALYSIS OF RESEARCH PROGRAMMES USING CMMI FRAMEWORK [PDF]

In this paper, we propose a new approach for evaluating research projects and programs. According our approach, the improvement might be achieved by adopting a results-based and a project portfolio approach, and assuring a research and technology ...
Angel MENA, Constanta Nicoleta BODEA, Virginia ATANASIU   +2 more
core  

Nucleotide Analogue-Related Proximal Renal Tubular Dysfunction during Long-Term Treatment of Chronic Hepatitis B: A Cross-Sectional Study

Gastroenterology Research and Practice, 2016
Background. There have been few reports of nucleotide analogue-related renal tubular dysfunction (RTD) in CHB patients. We assessed the prevalence and presentation of nucleotide analogue-related proximal RTD. Methods.
Abhasnee Sobhonslidsuk, Jirachaya Wanichanuwat, Pawin Numthavaj, Areepan Sophonsritsuk, Supanna Petraksa, Alongkorn Pugasub, Paisan Jittorntam, Anucha Kongsomgan, Sittiruk Roytrakul, Bunyong Phakdeekitcharoen   +9 more
doaj   +1 more source

Integration of Micro Resistance Thermometer Detectors in AlGaN/GaN Devices

IEEE Journal of the Electron Devices Society, 2014
Temperature measurements in AlGaN/GaN high electron mobility transistors are required for proper device design, modeling and achieving appropriate reliability. These measurements usually require sophisticated equipment and extensive calibration.
Osvaldo Arenas, Elias Al Alam, Alexandre Thevenot, Yvon Cordier, Abdelatif Jaouad, Vincent Aimez, Hassan Maher, Richard Ares, Francois Boone   +8 more
doaj   +1 more source

Thermoresistive Sensors Based on Eco‐Friendly Carbon Dioxide‐Derived Polymeric Poly(Cyclohexene)carbonate Loaded With Reduced Graphene Oxide and Carbon Black

Polymer Engineering &Science, EarlyView.
Thermoresistive sensing materials derived from eco‐friendly polymers for broad‐range temperature measurements. ABSTRACT Carbon dioxide‐derived polycarbonates (CO2‐PCs) present a sustainable alternative to standard bisphenol A polycarbonates (BPA‐PCs), as they are synthesized from the reaction between epoxide and carbon dioxide (CO2). In fact, these eco‐
Ane Martín‐Ayerdi, Luis Rubio‐Peña, Nikola Peřinka, Sergio Merillas, Itziar Oyarzabal, José Luis Vilas‐Vilela, Pedro Costa, Senentxu Lanceros‐Méndez   +7 more
wiley   +1 more source

RTD与PHEMT集成的几个关键工艺 [PDF]

, 2005
在新型的共振隧穿二极管(RTD)器件与PHEMT器件单片集成材料结构上,研究和分析了分立器件的制作工艺,给出了分立器件的制作工艺参数.利用上述工艺成功制作了RTD和PHEMT器件,并在室温下分别测试了RTD器件和PHEMT器件的电学特性.测试表明:在室温下,RTD器件的峰电流密度与谷电流密度之比提高到1.78;PHEMT器件的最大跨导约为120mS/mm,在Vgs＝0.5V时的饱和电流约为270mA/mm ...
刘忠立, 王建林, 杨富华, 白云霞, 王良臣, 曾一平   +5 more
core  

Simulated elephant foraging alters tree root exudation rates: Species‐specific responses and implications for belowground carbon dynamics in tropical forests

PLANTS, PEOPLE, PLANET, EarlyView.
Asian elephants play crucial roles in ecosystem functioning, and their interactions with plants influence above‐ and belowground carbon cycling. We tested whether their mechanically destructive foraging triggers short‐term, stress‐induced shifts in tree root exudation, an underappreciated pathway linking herbivory to belowground carbon processes.
Pratibha Khatri, Bimal Sharma, Lisa Ong, Ahimsa Campos‐Arceiz   +3 more
wiley   +1 more source