检索结果-南通市图书馆

Do supplemental perches influence electrocution risk for diurnal raptors?

Avian Research 2020年第2期11卷 139-149页

作者： Roberto sánchez Javier sánchez Javier Oria Francisco Guil Fundación CBD-Hábitat C/Gustavo Fernández Balbuena28002 MadridSpain Tragsa Group C/Conde de Peñalver8428006 MadridSpain Boscaje s.L. Plaza Conde de Cheste540001 SegoviaSpain Ministry for the Ecological Transition and the Demographic Challenge Plaza San Juan de la CruzS/N28071 MadridSpain

Background:Power lines are amongst the main causes of mortality for birds *** drives the population dynamics of several threatened species of raptors,at local and global *** the many solutions that have been tested to minimize this threat are supplemental perches;however,their efficiency has rarely been ***:We designed 43 transects in 4 districts in mainland Portugal to gather data from birds perching on pylons with or without supplemental *** 2015 to 2018,transects were surveyed by car at least *** analyzed the factors driving the use of these supplemental perches,and we analyzed if there were differences in the perceived risk(calculated from measurements and not from field surveys)depending on whether the perching was on pylons with or without supplemental ***:We recorded 548 perches of 14 *** conditions seemed to play a role in birds’choice of pylons with supplemental perches versus pylons without supplemental *** also indicated a strong influence of observational *** use of models showed us an important specific effect in the selection of supplemental perches where available:there are some species with a greater tendency to perch on supplemental perches,even when they use both pylons with and without supplemental *** most of the analyzed species and species groups,perceived risk was higher in pylons without supplemental perches compared to pylons with supplemental perches,but there were differences between ***:supplemental perches may be a useful and efficient tool for mitigating raptor ***,there are many influential factors affecting their success,and their effectiveness with different species groups is not *** studies show higher electrocution rates for certain species and devices and thus,their efficacy must be *** propose a two-step validation process,first in controlled conditions and then in the

关键词： Aquila adalberti Circaetus gallicus Diurnal raptors Electrocution Power lines Pylons

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Beacon-Less Geographic Routing in Real Wireless sensor networks

引用

Journal of Computer science & Technology 2008年第3期23卷 438-450页

作者： Juan A.sánchez Rafael Marín-Pérez Pedro M.Ruiz Department of Information and Communications Engineering University of MurciaSpain

Geographic Routing （GR） algorithms require nodes to periodically transmit HELLO messages to allow neighbors to know their positions （beaconing mechanism）. Beacon-less routing algorithms have recently been proposed to reduce the control overheads due to these messages. However, existing beacon-less algorithms have not considered realistic physical layers. Therefore, those algorithms cannot work properly in realistic scenarios. In this paper we present a new beacon-less routing protocol called BOss. Its design is based on the conclusions of our open-field experiments using Tmote-sky sensors. BOss is adapted to error-prone networks and incorporates a new mechanism to reduce collisions and duplicate messages produced during the selection of the next forwarder node. We compare BOss with Beacon-Less Routing （BLR） and Contention-Based Forwarding （CBF） algorithms through extensive simulations. The results show that our scheme is able to *** almost perfect packet delivery ratio （like BLR） while having a low bandwidth consumption （even lower than CBF）. Additionally, we carried out an empirical evaluation in a real testbed that shows the correctness of our simulation results.

关键词： geographic routing beacon-less forwarding performance evaluation real deployment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improved deterministic and stochastic models for simulating partial discharges in non‐conducting trees inside solid dielectrics

引用

High Voltage 2021年第1期6卷 82-94页

作者： Johnatan M.Rodríguez‐serna Ricardo Albarracín‐sánchez Department of Electrical and Electronic Engineering Automatic Controland Applied PhysicsSchool of Industrial Design and Engineering(ETSIDI)Universidad Politécnica de Madrid(UPM)MadridSpain Department of Electrical Engineering Universidad de AntioquiaMedellínColombia

Electrical trees are defects originated and driven by partial discharges(PD)activity and this is the reason why their modelling and simulation are fundamental for the ageing mechanisms comprehension and diagnosis analyses of insulation systems compound by solid *** study presents a brief review of the different models implemented to simulate PD in electrical trees inside solid *** addition,an improved deterministic model as well as a stochastic model are presented,which allow predicting adequately the PD pulses distribution,in magnitudes and phase,for non‐conducting electrical trees of different shape and *** case studies were simulated and their results exhibit good agreement when compared with measurements presented in the *** is concluded that the main parameters that state the PD behaviour in trees are the inception and extinction voltage mag-nitudes,including their probability distributions,and the tree *** models can be used for prognosis analysis based on on‐line measurements.

关键词： solid conducting electrical

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Crosslinked hyaluronic acid with liposomes and crocin for management symptoms of dry eye disease caused by moderate meibomian gland dysfunction

引用

International Journal of Ophthalmology(English edition) 2020年第9期13卷 1368-1373页

作者： José-María sánchez-González Concepción De-Hita-Cantalejo María Carmen sánchez-González Department of Physics of Condensed Matter Optics AreaUniversity of SevilleSeville 41012Spain

AIM:To study the effect of uncrosslinked and crosslinked hyaluronic acid combined with other artificial tear components in patients with dry eye caused by moderate meibomian gland ***:Prospective,single-blind,contralateral eye *** eyes(25 patients)were *** selection for each tear type was random,and the eye drop formulations,0.4%uncrosslinked hyaluronic acid and 0.2%galactoxyloglucan(tear A)and 0.15%crosslinked hyaluronic acid,crocin,and liposomes(tear B)were *** determined dosing schedule was three times a day for six weeks,and the study participants underwent a clinical examination before and 45 d after lubricant *** schirmer test,tear breakup time(TBUT)test,and Ocular surface Disease Index(OsDI)questionnaire were applied before and after instillation period with both types of artificial ***:On the schirmer test,a significant improvement was obtained with both tear A(Pnd tear B(Pn the TBUT test,a significant improvement was obtained with tear A(Pnd tear B(PsDI score significantly decreased after instillation period with both artificial tear types(PnCLUsIOn:Uncrosslinked hyaluronic acid combined with other components,such as tamarind seed polysaccharide,and crosslinked hyaluronic acid combined with liposomes and crocin are effective for management symptoms of dry eye disease.

关键词： liposome crosslinked hyaluronic acid meibomian gland dysfunction contact lens dry eye disease

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Factors affecting populations of the endemic Iberian hare(Lepus granatensis)after the first myxomatosis outbreaks in Central spain

引用

Integrative Zoology 2023年第6期18卷 981-993页

作者： Carlos LÁZARO JoséLuis GUZMÁn Fabián CAsAs Carlos sÁnchez-GARCÍA Department of Research Fundación ArtemisanCiudad RealSpain Department of Zoology Faculty of SciencesUniversity of GranadaGranadaSpain

The Iberian hare(Lepus granatensis)is an endemic species distributed in spain and *** outbreaks affecting this species were detected in 2018 in Central and southern spain,spreading *** to evaluate factors affecting the status of hare population after the arrival of myxomatosis,we conducted 108 nocturnal hare counts in Central spain during two study periods(winter/spring and summer/autumn)in 54 different hunting grounds,covering 1071 km and observing 884 *** mean density in winter/spring was 7.66 hares/100 ha,(range 6.14-9.54/100 ha),while in summer/autumn,it was 3.4 hares/100 ha(range 2.6-4.4/100 ha).Densities of hares were not affected by the dominant habitat and the presence/absence of myxomatosis *** were more abundant at hunting grounds at a higher altitude and in those conducting targeted management,while detection of myxomatosis was related to lower altitude and higher levels of game management.A MaxEnt model used to generate a risk map for myxomatosis occurrence showed that the temperature annual range was the most important predictor,which suggests that environmental factors affecting myxomatosis vectors(mosquitoes,fleas,and ticks)could play a key role in disease *** myxomatosis in hares is becoming endemic,hare densities may be improved by game management and the monitoring and surveillance of this emerging *** surveillance programs could be the basis of effective collaborations between hunters,researchers,and environmental managers.

关键词： game management habitat Iberian hare MaxEnt monitoring myxomatosis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regulator of G protein signaling 6 mediates exercise-induced recovery of hippocampal neurogenesis,learning,and memory in a mouse model of Alzheimer’s disease

引用

neural Regeneration Research 2025年第10期20卷 2969-2981页

作者： Mackenzie M.spicer Jianqi Yang Daniel Fu Alison n.DeVore Marisol Lauffer nilufer s.Atasoy Deniz Atasoy Rory A.Fisher Department of neuroscience and Pharmacology University of Iowa Carver College of MedicineIowa CityIAUSA Iowa neuroscience Institute University of Iowa Carver College of MedicineIowa CityIAUSA Interdisciplinary Graduate Program in Molecular Medicine University of Iowa Carver College of MedicineIowa CityIAUSA neural Circuits and Behavior Core University of Iowa Carver College of MedicineIowa CityIAUSA

Hippocampal neuronal loss causes cognitive dysfunction in Alzheimer’s *** hippocampal neurogenesis is reduced in patients with Alzheimer’s *** stimulates adult hippocampal neurogenesis in rodents and improves memory and slows cognitive decline in patients with Alzheimer’s ***,the molecular pathways for exercise-induced adult hippocampal neurogenesis and improved cognition in Alzheimer’s disease are poorly ***,regulator of G protein signaling 6(RGs6)was identified as the mediator of voluntary running-induced adult hippocampal neurogenesis in ***,we generated novel RGs6fl/fl;APP_(sWE) mice and used retroviral approaches to examine the impact of RGs6 deletion from dentate gyrus neuronal progenitor cells on voluntary running-induced adult hippocampal neurogenesis and cognition in an amyloid-based Alzheimer’s disease mouse *** found that voluntary running in APP_(sWE) mice restored their hippocampal cognitive impairments to that of control *** cognitive rescue was abolished by RGs6 deletion in dentate gyrus neuronal progenitor cells,which also abolished running-mediated increases in adult hippocampal *** hippocampal neurogenesis was reduced in sedentary APP_(sWE) mice versus control mice,with basal adult hippocampal neurogenesis reduced by RGs6 deletion in dentate gyrus neural precursor ***6 was expressed in neurons within the dentate gyrus of patients with Alzheimer’s disease with significant loss of these RGs6-expressing ***,RGs6 mediated voluntary running-induced rescue of impaired cognition and adult hippocampal neurogenesis in APP_(sWE) mice,identifying RGs6 in dentate gyrus neural precursor cells as a possible therapeutic target in Alzheimer’s disease.

关键词： adult hippocampal neurogenesis Alzheimer’s disease dentate gyrus exercise learning/memory neural precursor cells regulator of G protein signaling 6(RGs6)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

security-constrained model for integrated power and natural-gas system

引用

Journal of Modern Power systems and Clean Energy 2017年第3期5卷 326-336页

作者： Carlos M.CORREA-POsADA Pedro sánchez-MARTín sara LUMBRERAs XM Compania de Expertos en MercadosMedellı´nColombia Technological Research Institute(IIT) ICAI School of EngineeringComillas Pontifical UniversityMadridSpain

One of the main factors impacting the reliability of energy systems nowadays is the growing interdependence between electricity and gas networks due to the increase in the installation of gas-fired units. securityconstrained unit commitment(sCUC) models are used to economically schedule generating units without compromising the system reliability. This paper proposes a novel sCUC formulation that includes dynamic gas constraints,such as the line pack, and transmission contingencies in power and gas networks for studying the integrated system reliability. A Benders’ decomposition with linear programming techniques is developed to be able to study large systems. By including dynamic gas constraints into the sCUC, the proposed model accounts for the flexibility and reliability that power systems require from gas systems in the short term. Case studies of different size and complexity are employed to illustrate how the reliability of one system is affected by the reliability of the other. These experiments show how both systems operate in a secure way(by including contingencies) increases operating costs by approximately 9% and also show how these costs can vary by 24% depending on the line pack scheduling.

关键词： Benders’decomposition natural gas Reliability security-constrained unit commitment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Role of climatic variability in shaping intraspecific variation of thermal tolerance in Mediterranean water beetles

引用

Insect science 2024年第1期31卷 285-298页

作者： susana Pallarés David Garoffolo Belén Rodríguez David sánchez-Fernández Department of Zoology University of SevilleSevilleSpain Faculty of Biology Department of Ecology and HydrologyUniversity of MurciaCampus EspinardoMurciaSpain

The climatic variability hypothesis(CVH)predicts that organisms in more thermally variable environments have wider thermal breadths and higher thermal plasticity than those from more stable ***,due to evolutionary trade-offs,taxa with greater absolute thermal limits may have little plasticity of such limits(trade-off hypothesis).The CVH assumes that climatic variability is the ultimate driver of thermal tolerance variation across latitudinal and altitudinal gradients,but average temperature also varies along such *** explored intraspecific variation of thermal tolerance in three typical Mediterranean saline water beetles(families Hydrophilidae and Dytiscidae).For each species,we compared two populations where the species coexist,with similar annual mean temperature but contrasting thermal variability(continental *** population).We estimated thermal limits of adults from each population,previously acclimated at 17,20,or 25℃.We found species-specific patterns but overall,our results agree with the CVH regarding thermal ranges,which were wider in the continental(more variable)*** the two hydrophilid species,this came at the cost of losing plasticity of the upper thermal limit in this population,supporting the trade-off hypothesis,but not in the dytiscid *** results support the role of local adaptation to thermal variability and trade-offs between basal tolerance and physiological plasticity in shaping thermal tolerance in aquatic ectotherms,but also suggest that intraspecific variation of thermal tolerance does not fit a general pattern among aquatic *** such intraspecific variation could lead to inaccurate predictions of the vulnerability of aquatic insects to global warming.

关键词： acclimation capacity aquatic insects climate change heat coma temperature supercooling point thermal plasticity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

smallanthus sonchifolius roots ameliorate non-alcoholic fatty liver disease by reducing redox imbalance and hepatocyte damage in rats fed with a high fructose diet

引用

Asian Pacific Journal of Tropical Biomedicine 2019年第9期9卷 365-372页

作者： Mariano nicolás Alemán sara serafina sánchez stella Maris Honoré Instituto superior de Investigaciones Biológicas (InsIBIO) Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Tucumán (CONICET-UNT)

Objective: To evaluate the potential of smallanthus sonchifolius(s. sonchifolius) roots in ameliorating hepatic damage of rats fed with a high fructose ***: The effect of s. sonchifolius roots on energy intake, body weight, fat and liver mass was determined in male rats fed with a high-fructose diet. Plasma glucose, triglycerides, total cholesterol, lipoproteins and aspartate aminotransferase and alanine aminotransferase were analyzed. Histological changes of the livers were evaluated by electronic microscopy and apoptosis was examined using the TUnEL method. The levels of malondialdehyde, reducedglutathione and antioxidant enzymes(catalase, superoxide dismutase, glutathione peroxidase, glutathione s-transferase) activities were also ***: s. sonchifolius roots significantly decreased energy intake, body weight, fat and liver mass(P s. sonchifolius roots ameliorated liver steatosis and mitochondrial morphology, avoiding cellular apoptosis and normalizing transaminase activity in the liver of rats fed with high fructose. Enzymatic assays revealed that s. sonchifolius roots had a modulatory effect on the oxidative stress induced by fructose-feeding by reducing lipid peroxidation(P nd antioxidant enzyme activities(P n ***: s. sonchifolius roots can ameliorate non-alcoholic fatty liver disease by improving oxidative stress and liver injury.

关键词： smallanthus sonchifolius roots non-alcoholic fatty liver disease Oxidative stress Apoptosis Liver

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of different sports on fat mass and lean mass in growing girls

引用

Journal of sport and Health science 2017年第2期6卷 213-218页

作者： Esther Ubago-Guisado Esmeralda Mata Javier sánchez-sánchez María Plaza-Carmona María Martín-García Leonor Gallardo IGOID Research Group University of Castilla-La Mancha Toledo 45071 Spain GEnUD Toledo Research Group University of Castilla-La Mancha Toledo 45071 Spain school of sport UCAM Universidad Catoica San Antonio Murcia 30107 Spain

Purpose: The aim of this study was to analyze and compare the effects of different sports(swimming, football, basketball, and handball) on fat mass and lean mass in prepubertal and pubertal ***: Two hundred girls(10.6 ± 1.5 years old, Tanner stages I–III) participated in the study and were divided into 5 groups: 40 swimmers, 40 football players, 40 basketball players, 40 handball players, and 40 controls. Fat and lean masses at whole body, arms, trunk, and legs were measured using dual-energy X-ray absorptiometry(DXA). Pubertal status was determined using Tanner test. Effects of different sports on fat and lean masses were assessed through analysis of covariance with height as covariates. Analyses were performed separately in 2 groups depending on the Tanner stage(prepubertal and pubertal).Results: The girls of the control group had less lean mass and more fat mass compared to the girls who play sports(p nces in body fat between sports. The swimmers and football players had less body fat(p n the other hand, handball players showed the highest values in lean mass(p nclusion: Impact sports(football, basketball, and handball) and low-impact sports(swimming) provide an appropriate development of lean mass in growing girls. We can conclude that people practicing sports at early ages ensure a lower fat mass and higher lean mass compared to those who do not practice. These results may be useful as a preventive method of adult obesity.

关键词： Body composition DXA Female players Physical activity sports

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：