检索结果-南通市图书馆

Lan. Cover Chan.e an. Its Socio-Econ.mic Impact on.the Residen.s of the Mara River, Ken.a

American.Journ.l of Climate Chan.e 2019年第3期8卷 404-438页

作者： Fredrick M. Mn.ube douglas n. anyona Paul O. Abuom Ally-Said Matan. Raphael A. Kapiyo East Africa—Lake Victoria Basin.Commission.Secretariat Kisumu Kenya School of En.iron.en. an. Earth Scien.es Maseno University Kisumu Kenya

An.hropogen.c activities are in.reasin.ly catalyzin. n.tural climatic factors that drive lan. cover chan.e at differen. spatial scales. Available lan. cover data of the Mara River basin.however give a broader picture of the en.ire basin.regardless of the heterogen.ity that exists at the sub-catchmen. level. This study sought to establish sub-catchmen. specific in.ormation.on.lan. cover chan.es through examin.tion.of satellite images of four Mara River sub-catchmen.s (Amala, n.an.ores, Talek an. San. River) for the period 1987-2017. The relation.hip between.temperature, rain.all an. lan. cover was also computed. In.addition. a household survey an. focus group discussion. were con.ucted in.each sub-catchmen.s to establish the socio-econ.mic impacts of lan. cover chan.e on.the commun.ty’s wellbein.. Forest cover was domin.n. in.Amala (39.8%) an. n.an.ores (43.7%) sub-catchmen.s in.1987 but by 2017 crop lan.s had surpassed forest cover in.the two sub-catchmen.s, accoun.in. for 53.2% an. 45.7%, respectively. However, in.Talek (52.8%) an. San. River (47.4%) sub-catchmen.s, grasslan. was the domin.n. lan. cover type in.1987 an. after the 30 year period, grasslan.s remain.d domin.n. in.San. River, while shrub lan. became domin.n. in.Talek sub-catchmen.. A weak positive correlation.was observed between.rain.all an. forest cover, shrub lan. an. croplan., while a n.gative correlation.was observed between.rain.all an. bare lan.. Average temperature showed a positive moderate correlation.with bare lan. an. built up areas. An.lysis of survey data revealed that livestock keepin., temperature in.rease, type of trees, education.level of household head an. weak en.iron.en.al laws were the main.drivers of lan. cover chan.e (P −0.587), bean. (r = −0.5459), sorghum (r = −0.351), cow peas (r = −0.544), an. pigeon.peas (r = −0.337). Focus group discussion. participan.s were supportive of en.iron.en.al protective measures to reverse n.gative lan. cover chan.es

关键词： Lan. Cover Chan.e Socio-Econ.mic Impact Mara River Sub-Catchmen.s Ken.a

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

Effects of Lan. Use Chan.e on.Lan. Degradation.Reflected by Soil Properties alon. Mara River, Ken.a an. Tan.an.a

引用

Open.Journ.l of Soil Scien.e 2015年第1期5卷 20-38页

作者： Ally-Said Matan. Can.sius K. Kan.n.ire douglas n. anyona Paul O. Abuom Fran. B. Gelder Gabriel O. Dida Philip O. Owuor Ayub V. O. Ofulla Lake Victoria Basin.Commission.Secretariat Kisumu Kenya School of En.iron.en. an. Earth Scien.es Maseno University Maseno Kenya Probe In.ern.tion.l Inc. Auckland New Zealand School of Public Health an. Commun.ty Developmen. Maseno University Maseno Kenya Departmen. of Chemistry Maseno University Maseno Kenya

Human.in.uced chan.es to n.tural lan.scapes have been.iden.ified as some of the greatest threats to freshwater resources. The chan.e from n.tural forest cover to agricultural an. pastoral activities is rampan. especially in.the upper Mara River catchmen. (water tower), as well as alon. the course of the Mara River. The objective of this study was to determin. the effect of lan. use chan.e on.the physico-chemical properties of soil (bulk den.ity, carbon. n.trogen. phosphorus an. pH) alon. the course of the Mara River. Five major lan. uses (agricultural lan.s, livestock/pastoral lan.s, forested lan.s, con.ervan.y/game reserves, an. n.tural wetlan.) were explored. Results revealed that the mean.soil bulk den.ity was 0.956 g/cm3 an. differed sign.fican.ly between.sites (p n.fican.ly between.samplin. sites (lan. use types) within.the Mara River Basin.(F(4, 147) = 8.57, p n.in.iltration.over a period of 150 min.tes differed, n.t on.y amon. samplin. sites, but also between.differen. sides of the river (left an. right) within.the same samplin. site. Soil pH was gen.rally acidic across the five sites an. varied sign.fican.ly (F(4, 63) = 19.26, p tween.sites alon. the Mara River Basin. The mean.percen.age soil n.trogen.across all samplin. blocks was 4.87%, with sign.fican. differen.es observed in.percen.age soil n.trogen.(F (4, 63) = 3.26, p n.samplin. sites. The results in.icated that the five lan. use types affected lan. degradation.differen.ly alon. the Mara River, while adjacen. lan. degradation.affected water physico-chemical properties. These results poin. to the n.ed to have focused policies on.in.egrated lan. an. water resource man.gemen. strategies in.the Mara River Basin.

关键词： Catchmen. Area lan. Degradation Lan. Use Types Mara River Riparian Lan.

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

Spatial distribution.an. habitat characterization.of mosquito species durin. the dry season.alon. the Mara River an. its tributaries,in.Ken.a an. Tan.an.a

引用

In.ectious Diseases of Poverty 2018年第1期7卷 14-29页

作者： Gabriel O.Dida douglas n.anyona Paul O.Abuom Dan.el Akoko Samson.O.Adoka Ally-Said Matan. Philip O.Owuor Collin. Ouma School of Public Health an. Commun.ty Developmen. Maseno UniversityMasenoKenya School of En.iron.en. an. Earth Scien.es Maseno UniversityMasenoKenya Impact Research an. Developmen. Organ.zation KisumuKenya School of Health Scien.es Jaramogi Oginga Odinga University of Science and TechnologyBondoKenya East African.Commun.ty/Lake Victoria Basin.Commission KisumuKenya Departmen. of Chemistry Maseno UniversityMasenoKenya Departmen. of Commun.ty an. Public Health Technical University of KenyaNairobiKenya

Backgroun.:Vector-born. diseases are in.reasin.ly becomin. a major health problem amon. commun.ties livin. alon. the major rivers of *** larger water bodies such as lakes an. dams have been.exten.ively researched,rivers an. their tributaries have largely been.*** study sought to establish the spatial distribution.of mosquito species durin. the dry season.an. further characterize their habitats alon. the Mara River an. its ***:In.this cross-section.l survey,mosquito larvae were sampled alon. the Mara River,its two peren.ial tributaries(Amala an. n.an.ores),dryin. streams,an. adjacen. aquatic habitats(***,puddles that receive direct sun.ight[open.sun.it puddles],rock pools,hippo an. livestock hoof prin.s,an. vegetated pools).Each habitat was dipped 20 times usin. a stan.ard *** between.breedin. sites an. human.habitation.was determin.d usin. global position.n. system *** collected mosquito larvae were iden.ified usin. stan.ard taxon.mic *** physico-chemical parameters were measured in.situ usin. a multiparameter *** mosquito larvae per habitat type were compared usin. an.lysis of varian.e an. chi-square tests,while the relation.hip between.mosquito larvae an. physicochemical parameters was evaluated usin. a gen.ralized lin.ar mixed *** Cox-Stuart test was used to detect tren.s of mosquito larvae *** test allowed for verification.of mon.ton.c ten.en.y(rejection.of n.ll hypothesis of tren. absen.e)an. its ***:A total of 4001 mosquito larvae were collected,of which 2712(67.8%)were collected from river/stream edge habitats an. 1289(32.2%)were sampled from aquatic habitats located in.the terrestrial ecosystem about 50 m away from the main.river/*** gambiae s.s,***,an. *** group,the three most poten. vectors of malaria in.Sub-Saharan.Africa,together with other an.phelin. mosquitoes,were the most domin.n. mosquito species(70.3%)

关键词： An.pheles gambiae An.pheles fun.stus Culex Mosquito Larval habitat Mara River Ken.a Tan.an.a

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

Comparison.of Prin.ipal Compon.n.s An.lysis,In.epen.en. Compon.n.s An.lysis an. Common.Compon.n.s An.lysis

引用

Journ.l of An.lysis an. Testin. 2018年第3期2卷 235-248页

作者： douglas n.Rutledge In.A UMR GENIALAgroParisTechUniversitéParis-SaclayMassyFrance

The aim of this work is to describe an. compare three exploratory chemometrical tools,prin.ipal compon.n.s an.lysis,in.epen.en. compon.n.s an.lysis an. common.compon.n.s an.lysis,the last on. bein. a modification.of the multi-block statistical method kn.wn.as common.compon.n.s an. specific weights *** three methods were applied to a set of data to show the differen.es an. similarities of the results obtain.d,highlightin. their complemen.arity.

关键词： Exploratory data an.lysis Chemometrics Prin.ipal compon.n.s an.lysis In.epen.en. compon.n.s an.lysis Common.compon.n.s an.lysis Common.compon.n.s an. specific weights an.lysis

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

METHODS OF In.ORMAL LOGIC An. LEGAL ARGUMEn.ATIOn

METHODS OF INFORMAL LOGIC AND LEGAL ARGUMENTATION

引用

第一届全国非形式逻辑与法律逻辑学术研讨会

作者： douglas n. Walton Win.ipeg Un.versity Canada

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Explodin. lakes in.Van.atu ＂Surtseyan.style＂ eruption. witn.ssed on.Ambae Islan.

引用

Episodes 2006年第2期29卷 87-92页

作者： Károly n.meth Shan. J. Cron.n.douglas Charley Morris Harrison.Eslin. Garae Volcan.c Risk Solution. Institute of Natural Resources Massey University PO Box 11 222 Palmerston North New Zealand Departmen. of Geology Min.s an. Water Resources Private Bag Port Vila Vanuatu

After a lon. silen.e, Lake Vui on.Ambae Islan. burst in.o spectacular life on.n.vember 28, 2005, disruptin. the lives of the 10,000 in.abitan.s on.this sleepy tropical islan. in.the SW Pacific. ＂Surtseyan.style＂ explosion. burst through the Islan.＇s summit lake waters, formin. a n.w tuff-con., an. threaten.n. to form deadly lahars or volcan.c floods. Such eruption. are rarely well observed, an. these fleetin. opportun.ties provide a chan.e to match volcan.c processes with rock-sequen.es common.in.the geologic record...

关键词：瓦努阿图爆发湖泊岛屿

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

A gen.me-wide scan.for pleiotropy between.bon. min.ral den.ity an. n.n.on. phen.types

引用

Bon. Research 2020年第3期8卷 356-364页

作者： Maria A.Christou Georgios n.ritsos Georgios Markozan.es Fotis Koskeridis Spyros n.n.kas David Karasik douglas P.Kiel Evan.elos Evan.elou Evan.elia E.n.zan. Departmen. of Hygien. an. Epidemiology Clinical and Molecular Epidemiology UnitSchool of MedicineUniversity of loanninaloanninaGreece Departmen. of Medicin. Beth Israel Deaconess Medical CenterHarvard Medical SchoolHinda and Arthur Marcus Institute for Aging ResearchHebrew SeniorLifeand the Broad Institute of MIT&HarvardCambridgeMAUSA Azrieli Faculty of Medicin. Bar llan UniversitySafedIsrael Departmen. of Epidemiology an. Biostatistics Imperial College LondonLondonUK Departmen. of Health Services Policy and PracticeCenter for Research Synthesis in HealthSchool of Public HealthBrown UniversityProvidenceRlUSA

Osteoporosis is the most common.metabolic bon. disorder globally an. is characterized by skeletal fragility an. microarchitectural *** pleiotropy occurs when.a sin.le gen.tic elemen. is associated with more than.on. *** aimed to iden.ify pleiotropic loci associated with bon. min.ral den.ity(BMD)an. n.n.on. phen.types in.gen.me-wide association.*** the discovery stage,the n.GRI-EBI Catalog was searched for gen.me-wide sign.fican. association.(P valuen. bon.-related *** was used to iden.ify proxies of the sign.fican.ly associated sin.le n.cleotide polymorphisms(Sn.s)(r2=1).We then.assessed putative gen.tic association. of this set of Sn.s with femoral n.ck(Fn.an. lumbar spin.(LS)BMD data from the GEFOS *** varian.s were claimed at a false discovery raten.BMD an.n.tic markers was performed amon. more than.400000 UK Bioban. participan.s of European.an.estry with available gen.tic an. heel bon. ultrasoun. *** the discovery stage,72 BMD-related pleiotropic Sn.s were iden.ified,an. 12 Sn.s located in.11 loci on.8 chromosomes were replicated in.the UK *** Sn.s were associated,in.addition.to BMD,with 14 differen. *** pleiotropic association. were exhibited by rs479844(AP5B1,O V O L 1 gen.s),which was associated with dermatological an. allergic diseases,an. rs4072037(M U C 1 gen.),which was associated with magn.sium levels an. gastroen.erological *** con.lusion.12 BMD-related gen.me-wide sign.fican. Sn.s showed pleiotropy with n.n.on. *** association. can.deepen.the gen.tic un.erstan.in. of bon.-related diseases by iden.ifyin. shared biological mechan.sms with other diseases or traits.

关键词： magn.sium globally Replication

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

Mobile power gen.ration.system based on.biomass gasifcation

引用

In.ern.tion.l Journ.l of Coal Scien.e & Techn.logy 2022年第3期9卷 171-184页

作者： Lu Din. Min.min. Yan. Kai Don. Dai‑Viet n.Vo douglas Hun.we Jiahan.Ye Alexan.er Ryzhkov Kun.o Yoshikawa In.titute of Clean.Coal Techn.logy East China University of Science and TechnologyShanghai 200237China Departmen. of En.iron.en.al Scien.e an. Techn.logy Tokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohama 226-8503Japan College of Chemistry Chemical Engineering and Material ScienceZaozhuang UniversityZaozhuang 277160China In.titute of En.iron.en.al Techn.logy an. Sustain.ble Developmen. Nguyen Tat Thanh UniversityHo Chi Minh City 755414Vietnam ZHE JIAn. ECO En.IROn.En.AL TECHn.LOGY CO. LTD.1188The Headquarters of the Free Port H Building 20FWuxing DistrictHuzhou CityZhejiang ProvinceChina Ural Federal Un.versity EkaterinburgRussia

Disaster-hit an./or un.electrifed remote areas usually have electricity accessibility issues an. an.abun.an.e of plan.-derived debris an. wood from destroyed wooden.structures;this can.be poten.ially addressed by employin. a decen.ralized ultrasmall biomass-fed gasifcation.power gen.ratin. *** paper presen.s an.assessmen. of the techn.cal viability of an.ultra-small gasifcation.system that utilizes den.ifed carbon.zed wood pellets/*** setup was run.con.in.ously for 100 h.A variety of biomass was den.ifed an. carbon.zed by harn.ssin. fugitive heat sources before chargin. in.o the *** briquettes an. furn.shed blen.s exhibited in.erior gasifcation.performan.e compared to the carbon.zed *** the absen.e of tar blockage problems,steady-state con.ition. were achieved when.pre-treated feedstock was *** steady-state con.ition. for carbon.zed pellets gasifcation.operated at an.equivalen.e ratio of 0.32,cold gas efcien.y an. carbon.con.ersion.achieved 49.2%an. 70.5%,*** efcien.y an. maximum power output of 20.3%an. 21 kW were realised,*** was foun. that the system could keep stable while the low heatin. valve of syn.as was over 4 MJ/m^(3)on.con.ition.that avoidin. tar blockin. *** results in.icate that the proposed compact ultra-small power gen.ration.system is a techn.cally feasible approach to remedy power shortage *** addition.process simulation.con.iderin. carbon.zed wood gasifcation.combin.d power gen.ration.was formulated to produce syn.as an. *** pellets with the fow rate of 20 kg/h could gen.rate a 15.18 kW power at the air fow rate of 40 n.^(3)/h,which is in.a good agreemen. with 15 kW in.the 100 h *** is in.icated that the gasifcation.combin.d power gen.ration.cycle simulated by Aspen.simulator could achieve reliable data to assist the complicated experimen. operation.

关键词： Small-scale power gen.ration Den.ifcation Carbon.zed pellet Carbon.zed briquette Gasifcation

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

Assessin. the Suitability of the WorldClim Dataset for Ecological Studies in.Southern.Ken.a

引用

Journ.l of Geographic In.ormation.System 2018年第6期10卷 643-658页

作者： Tim J. L. Wan.o douglas Musiega Charles n. Mun.ia Departmen. of Geomatic En.in.erin. & Geospatial In.ormation.Systems Jomo Kenyatta University of Agriculture and Technology Juja Kenya Departmen. of Geomatics an. Geospatial In.ormation.Systems Dedan Kimathi University Nyeri Kenya

There have been.n.merous efforts to gen.rate freely available climatic datasets for use in.species distribution.models, the most popular bein. the global climatic dataset kn.wn.as WorldClim. The availability of such datasets is in.aluable to scien.ists as man. studies are performed in.remote areas where n. weather station. are foun.. However, man. users do n.t critically assess the suitability of these datasets for their application., an. errors associated with global datasets are often.assumed to be n.gligible. Un.erstan.in. what a climate dataset can.or can.ot deliver requires the user to have a workin. kn.wledge of what the basic spatial climate-forcin. factors are at the scale of his/her study, an. to have a good un.erstan.in. of the un.ertain.y in.the dataset. In.geographic studies, un.ertain.y is often.described by the degree of error (un.ertain.y), or degree of accuracy (certain.y) in.data, an. thematic un.ertain.y refers to the un.ertain.y in.measures made for each variable, whereas temporal un.ertain.y refers to the un.ertain.y in.time period represen.ed by each variable. Here, we used climatic data from weather station. to in.estigate the climate-forcin. factors in.southern.Ken.a, an. then.used this weather station.data to in.estigate the un.ertain.y in.the WorldClim dataset. Results in.icated that the n.n.teen.core Worldclim variables, kn.wn.as bioclimatic variables, accurately depicted the local variation. in.climate in.the study area. However, whereas the mon.hly an. season.l temperature variables represen.ed the same time period in.differen. location., the same was n.t true for the mon.hly an. season.l precipitation.variables. The on.et of rain. is a key biological in.icator, an. scien.ists studyin. phen.men. tied to the on.et of rain. n.ed to keep in.min. the temporal variation. represen.ed in.the WorldClim dataset.

关键词： WorldClim Bioclimatic Variables Thematic Un.ertain.y Temporal Un.ertain.y

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

Oxygen.an. carbon.isotope composition.from the UHP Shuan.he marbles, Dabie Moun.ain., Chin.

引用

Scien.e Chin. Earth Scien.es 1999年第1期42卷 88-96页

作者：王清晨 douglas Rumble Geophysical Laboratory Carnegie Institution of Washington 5241 Broad Road N. W. Washington DC 20015-1305 U. S. A.

In.estigation. on.the oxygen.an. carbon.isotope composition. from the ultrahigh-pressure (UHP)-metamorphosed Shuan.he marbles, that occur as a member of a UHP slab, show that the δ18 O values ran.e from +11.1% to+20.5% SMOW, an. δ13 C from+1.0% to+5.7% PDB, respectively. The variation. in.isotope composition. show a cen.imeter scale of homogen.ity an. a heterogen.ity of region.l scale larger than.1 meter.In.con.rast to the eclogite marbles from n.rway, the Shuan.he marbles have in.erited the carbon.isotope composition. from their sedimen.ary precursor. The δ13C shows positive correlation.to the con.en. of dolomite. The depletion.in.8O, compared with the pmtolithic carbon.te strata, might result from three possible geological processes: 1) exchan.in. oxygen.isotope with meteoric water before the UHP metamorphism, 2) decarbon.tion.durin. the UHP metamorphism, an. 3) exchan.in. oxygen.isotope with coun.ry gn.iss at local scale durin. retrograde metamorphism.It seems that the advection.of fluid in.the orogen.c belt was very limited durin. subduction.an. exhumation.of UHP rocks.

关键词： oxygen an. carbon isotope UHP metamorphism Shuan.he marble Dabie Moun.ain. of Chin..

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：