Results 141 to 150 of about 83,177 (340)

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

open access: yesHigh Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang   +4 more
wiley   +1 more source

Propuesta de un sistema de mantenimiento para una bomba centrífuga HACOC HK 210

open access: yesCiencia & Futuro
Se estableció un sistema de mantenimiento efectivo para garantizar la durabilidad de la bomba centrífuga HACOC HK 210/200r12cbTB2 debido a la existencia de frecuentes fallas y minimizar los costos de reparación y reemplazo.
Saray Sablón-Leyva   +4 more
doaj  

Full‐length transcriptome profiling of true bug mitochondrial genomes reveals the unique transcriptional regulation during insect evolution

open access: yesInsect Science, EarlyView.
The mitogenome was transcribed into complete primary polycistrons on both strands. The heteropteran mitochondrial transcription termination factor (HmTTF) functions as a bidirectional attenuator rather than a terminator, and co‐evolution of HmTTF and the binding sites was observed.
Shiwen Xu   +6 more
wiley   +1 more source

Las Casas Bibliotecas en el Plan Turquino de Moa. Evaluación de los servicios 2006 -2010

open access: yes, 2011
Trabajo de DiplomaLa presente investigación se desarrolla en las 4 Casas Bibliotecas del Plan Turquino del municipio de Moa, su objetivo general es evaluar los servicios en el periodo 2006 - 2010.
Hernández Court, Ayelis
core  

Mainland diversification and recent island lineages in the reduviid genus Tapirocoris: an integrative taxonomic framework with four new species

open access: yesInsect Science, EarlyView.
Using an integrative taxonomic framework that combines COI DNA barcodes, geometric morphometrics and phylogeography, we revise the assassin bug genus Tapirocoris and recover seven well‐supported species, including four newly described cryptic species.
Ping Zhao   +8 more
wiley   +1 more source

Evaluación de la eficiencia energética en los estanques de la Camaronera Guajaca Frank País, Cuba

open access: yesCiencia & Futuro
El propósito de esta investigación es evaluar la eficiencia energética de los sistemas eléctricos en los estanques de la Camaronera Guajaca Frank País, Cuba. El análisis se centra en los servicios (1, 2 y 4) que suministran energía a los estanques, donde
Lián Blanco-Cuba   +4 more
doaj  

Heterogeneity in the relationship between undocumented immigration and violent victimization: Evidence from the National Crime Victimization Survey

open access: yesCriminology, EarlyView.
Abstract Undocumented immigration and its relation to public safety are subjects of intense political debate in the United States. Empirical evidence remains limited, and prior research has not examined how the relationship between undocumented immigration and victimization risk may vary by individuals’ citizenship status and local immigration policy ...
Min Xie, Eric P. Baumer
wiley   +1 more source

Evaluación de la retención de humedad en suelos lateríticos mediante la aplicación de agrominerales

open access: yesCiencia & Futuro
Se evaluó la influencia de la capacidad de absorción y retención de agua en los suelos del organopónico de la Universidad de Moa, con la adición de agrominerales. Para el mismo, se emplea el método analítico de la humedad gravimétrica.
Daliana M. Arjona-Mendoza   +4 more
doaj  

金属氧化物避雷器泄漏电流在线测试分析

open access: yesDianci bileiqi, 2008
用在线监测法和定期带电检测法对金属氧化物避雷器(MOA)的泄漏电流进行了测试,影响MOA泄漏电流测试结果的因素有:MOA两端电压中谐波含量的影响;MOA两端电压波动的影响;MOA外表面污秽的影响;温度对MOA泄漏电流的影响;湿度对测试结果的影响;运行中三相MOA的相互影响。判断MOA质量状况时,建议采用标准法、横向比较法、纵向比较法和综合分析法。
孙鹏举
doaj  

Fishing Activity Affected Odontocete Cetacean Distribution in a Marine Protected Area in the East China Sea

open access: yesIntegrative Zoology, EarlyView.
Spatiotemporal distribution of odontocete cetaceans within China's Jiushan Archipelago National Nature Reserve was investigated. Fishing vessels significantly reduced both cetacean acoustic detections and feeding activity, whereas gillnets selectively suppressed cetacean feeding behavior without affecting overall cetacean detection rates.
Yifan Liu   +10 more
wiley   +1 more source

Home - About - Disclaimer - Privacy