检索结果-南通市图书馆

Land Use/Land Cover Dynamics and Anthropogenic Driving Factors in Lake Baringo Catchment, Rift Valley, Kenya

Natural Resources 2019年第10期10卷 367-389页

作者： Molly Ochuka Chris Ikporukpo yahaya mijinyawa George Ogendi Department of Agricultural and Environmental Engineering Pan African University Life and Earth Sciences Institute University of Ibadan Ibadan Nigeria Department of Geography University of Ibadan Ibadan Nigeria Department of Agricultural and Environmental Engineering University of Ibadan Ibadan Nigeria Department of Environmental Science Egerton University Njoro Kenya.

Anthropogenic activities have altered land cover in Lake Baringo Catchment contributing to increased erosion and sediment transport into water bodies. The study aims at analyzing the spatial and temporal Land Use and Land Cover Changes (LULCC) changes from 1988 to 2018 and to identify the main driving forces. GIS and Remote Sensing techniques, interviews and field observations were used to analyze the changes and drivers of LULCC from 1988-2018. The satellite imagery was selected from SPOT Image for the years 1988, 1998, 2008 and 2018. Environment for Visualizing Images (ENVI 5.3) was used to perform image analysis and classification. The catchment was classified into six major LULC classes which are water bodies, settlement, rangeland, vegetation, farmland and bare land. The results revealed that, between the years 1988-1998, and 1998-2008, water bodies decreased by 2.77% and 0.76% respectively. However, during the years 2008-2018, water body coverage increased by 1.87%. Forest cover steadily increased from 1988-2018. From 1988-1998, 1998-2008 and 2008-2018, farmland was increased by 21.11%, 3.21% and 1.7% while rangeland decreased continuously between the years 1988-1998, 1998-2008 and 2008-2018 in the order 15.14%, 4.13% and 3.74% respectively. Similarly, bare land also reduced by 1.75%, 1.04% and 0.99% between the years 1988-1998, 1998-2008 and 2008-2018 respectively. The findings attributed LULCC to rapid population growth, deforestation, poor farming practices and overstocking. The results will provide valuable information to the relevant stakeholders to formulate evidence-based land use management strategies in order to achieve ecological integrity.

关键词： Land Use/Land Cover Catchment Anthropogenic Factors Land Management

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

Green Measurements for Software Product Based on Sustainability Dimensions

引用

Computer Systems Science & Engineering 2022年第4期41卷 271-288页

作者： Komeil Raisian Jamaiah yahaya Aziz Deraman Department of Computer Isfahan(Khorasgan)BranchIslamic Azad UniversityIsfahanIran Faculty of Information Science and Technology Universiti Kebangsaan MalaysiaBangi43600SelangorMalaysia Faculty of Ocean Technology Engineering&Informatics Universiti Malaysia Terengganu21030TerengganuMalaysia

Software is a central component in the modern world and vastly affects the environment’s *** demand for energy and resource require-ments is rising when producing hardware and software *** study reveals that many studies focused on green hardware;however,limited efforts were made in the greenness of software *** software products are necessary to solve the issues and problems related to the long-term use of soft-ware,especially from a sustainability *** a proper mechanism for measuring the greenness of a particular software product executed in a speciﬁc environment,the mentioned beneﬁts will not be ***,there are not enough works to address this problem,and the green status of software products is uncertain and *** paper aims to identify the green measurements based on sustainable dimensions in a software *** second objective is to reveal the relationships between the elements and measurements through empirical *** study is conducted in two ***ﬁrst phase is the theoretical phase,where the main components,measurements and practices that inﬂuence the sustainability of a software product are identiﬁ*** second phase is the empirical study that involved 103 respondents in Malaysia investigating current practices of green software in the industrial environment and further identifying the main sustainability dimensions and measurements and their impact on achiev-ing green software *** study has revealed seven green measurements of software product:Productivity,Usability,Cost Reduction,Employee Support,Energy Efﬁciency,Resource Efﬁciency and Tool *** relationships are statistically signiﬁcant,with a signiﬁcance level of less than 0.01(p=0.000).Thus,the hypothesised relationships were all *** contributions of this study revolve around the research perspectives of the measurements to attain a green software product.

关键词： Green software product sustainability dimension empirical study green measurements

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

Quartz dissolution in a single phase-high pH Berea sandstone via alkaline injection

引用

Energy Geoscience 2021年第3期2卷 181-188页

作者： Abdullah Musa Ali Mohammed Yerima Kwaya Abubakar mijinyawa Department of Geology Bayero University Kano(BUK)KanoNigeria

A common assertion is that alkaline solution aids oil mobilization by generating in situ soap,or by lowering interfacial tension(IFT)to ultra-low values in synergy with *** study takes a different approach that involves the alkaline dissolution of detrital quartz grains of sandstone reservoirs to create pathways for oil migration and *** dissolution via alkaline injection will result in changes in permeability and *** study performed high-pH core flooding on Berea sandstones using core displacement *** molybdate spectrophotometry was applied to measure the amount of dissolved *** and confining pressure variations were also *** molar concentration of NaOH varied at 0.5 M and 1.0 *** results show higher initial silica dissolution for 0.5 M NaOH(˃200mg/L)compared to 1.0 M NaOH(20 mg/L),which can be attributed to the presence of pre-existing dissolved silica and precipitates in the system prior to the first injection ***,a steady quartz dissolution rate of 0.4 mg/L/hr for 20 h was only achieved at 1.0 ***,an abrupt drop in quartz dissolution to below 0 mg/L was recorded for 0.5 M NaOH after 3 h of *** higher molar concentration of injected alkaline solution,both confining and inlet pressures increased from 8 and 5 bars to 12 and 11 bars as a result of the increased secondary phase of(hydr)oxides or precipitates in the ***,it can be inferred that the effect of alkaline solution on quartz dissolution is strongly dependent on molar concentration.

关键词： Alkaline injection Core flooding Dissolved silica Quartz Petroleum recovery

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

Permittivity models for determination of moisture content in Hevea Rubber Latex

引用

International Journal of Agricultural and Biological Engineering 2014年第5期7卷 48-54页

作者： Nor Zakiah yahaya Zulkifly Abbas Nursakinah Mohamad Ibrahim Mardiah Hafizah Muhammad Hafizi Muhamad Zamri yahaya Department of Physics Faculty of ScienceUniversiti Putra Malaysia43400 UPM SerdangSelangor Darul EhsanMalaysia School of Materials and Mineral Resources Engineering Universiti Sains Malayisa14300Nibong TebalPulau PinangMalaysia

The commercial open-ended coaxial probe(Agilent 85070E)is the most commonly used sensor to determine the permittivity of wet *** paper extends the usability and applicability of the sensor to the estimation of moisture content in Hevea Rubber *** dielectric constant and loss factor were measured using the commercial probe whilst the moisture contents were obtained using the standard oven drying *** results were obtained between the different dielectric models to predict moisture content in *** the dielectric constant and the loss factor of rubber latex linearly increased with moisture content at all selected *** equations were established to relate both the dielectric constant and the loss factor with moisture *** equations were used to predict moisture content in Hevea latex from measured values of the dielectric constant and the loss *** lowest mean relative error between actual and predicted moisture contents was 0.02 at 1 GHz when using the Cole-Cole dielectric constant calibration equation.

关键词： open-ended coaxial probe permittivity models Hevea Rubber Latex moisture rubber content

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

Zeylanicobdella arugamensis,the marine leech from cultured crimson snapper (Lutjanus erythropterus),Jerejak Island,Penang,Malaysia

引用

Asian Pacific Journal of Tropical Biomedicine 2017年第5期7卷 473-477页

作者： Rajiv Ravi Zary Shariman yahaya School of Biological Sciences Universiti Sains Malaysia11800PenangMalaysia

Objective:To investigate the prevalence,phylogenetics and DNA barcoding of Zeylanicobdella arugamensis(***) from crimson snapper(Lutjanus erythropterus),Jerejak Island,Penang,***:Experiment was conducted with 200 fish specimens of cultured Lutjanus erythropterus from Jerejak Island,Penang,Peninsular *** water temperature and length for each fish were measured prior to parasites ***,the morphological identification of parasites was *** DNA from parasites was extracted for further molecular *** PCR amplification,phylogenetic tree was *** lowest Bayesian information criterion scores showed that the most compatible model is Tajima and ***,data sets of cytochrome oxidase subunit I gene sequence and trace file have been submitted to Barcode of Life Data ***:The prevalence rate of *** was recorded to be 11.5%,and the intensity was *** low intensity was due to the water temperature recorded in this study(32.9–33.2 C).All the individuals of *** recorded in this study showed a close relationship with species that were recorded in NCBI database(*** DQ414344,Aestabdella leiostomi DQ414305,Pterobdella amara DQ414334 and Cystobranchus meyeri DQ414315) but less relationship with Aestabdella abditovesiculata ***,the DNA sequences submitted to Barcode of Life Data System in accordance to species have already obtained Barcode Index Number as BOLD:***:This study has provided an overview of sequence divergence at cytochrome oxidase subunit I gene,DNA barcodes and parasite prevalence of ***.

关键词： Cytochrome oxidase subunit I gene Zeylanicobdella arugamensis Scanning electron microscope Lutjanus erythropterus

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

Recent advances in the chemistry of nitrogen,phosphorus and potassium as fertilizers in soil:A review

引用

Pedosphere 2023年第3期33卷 385-406页

作者： Sharhabil Musa yahaya Aliyu Ahmad MAHMUD Mustapha ABDULLAHI Abdurrashid HARUNA Department of Soil Science Faculty of Agriculture/Institute for Agricultural ResearchAhmadu Bello UniversityPrivate Mail Bag(P.M.B.)1044Zaria 810107(Nigeria) Faculty of Agriculture Banat's University of Agricultural Sciences and Veterinary Medicine“King Michael I of Romania”from TimisoaraTimisoara 300645(Romania) Faculty of Agriculture and Veterinary Science Mewar UniversityChittorgarhGangrar 312901(India) Department of Pure and Applied Chemistry Faculty of SciencesKaduna State UniversityTafawa Balewa WayP.M.B.2339Kaduna 741102(Nigeria) Department of Chemistry Faculty of Physical SciencesAhmadu Bello UniversityP.M.B.1044Zaria 810107(Nigeria) Department of Fundamental and Applied Sciences Universiti Teknologi PetronasPerak Darul RidzuanSeri Iskandar 32610(Malaysia)

The advent of civilization has made humans dependent on plants for food and medicine,leading to the intensification of agricultural *** intense cultivation of crops has resulted in the depletion of available nutrients from soil,thereby demanding the application of excess nutrients to soil to improve ***,mineral fertilizer discovery and application have,in many ways,contributed greatly to meeting global food ***,aside from the positive effects of mineral fertilizers,their excessive application to soil produces large amounts of pollutants that affect environmental *** necessitates the study of the major mineral fertilizer elements(nitrogen(N),phosphorus(P),and potassium(K)),the forms in which they are applied to soil,and their chemistry/reactions in ***,we reviewed the forms of different N,P,and K mineral fertilizers to provide current knowledge on their constituents,the chemistry of N,P,and K in soil to understand the reactions they undertake in soil,the efficient methods of fertilizer application for environmental sustainability,the effects of mineral fertilizer loss to the environment,and improved fertilization technologies for environmental *** are a promising technology for sustainable agricultural production and are discussed in detail in this review.

关键词： biofertilizer environmental sustainability fertilizer application method fertilizer form mineral fertilizer nanofertilizer nutrient loss nutrient use efficiency

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

Annona muricata:Is the natural therapy to most disease conditions including cancer growing in our backyard?A systematic review of its research history and future prospects

引用

Asian Pacific Journal of Tropical Medicine 2017年第9期10卷 835-848页

作者： yahaya Gavamukulya Fred Wamunyokoli Hany A.El-Shemy Department of Molecular Biology and Biotechnology Pan African University Institute for Basic SciencesTechnology and Innovation(PAUSTI)P.O.Box62000-00200 NairobiKenya Department of Biochemistry and Molecular Biology Busitema University Faculty of Health SciencesP.O.Box1460 MbaleUganda Department of Biochemistry Jomo Kenyatta University of Agriculture and TechnologyP.O.Box62000-00200 NairobiKenya Department of Biochemistry Faculty of AgricultureCairo University12613 GizaEgypt

Annona muricata(***)is a tropical plant species belonging to family Annonaceae and known for its many medicinal *** review focuses on the research history of its traditional uses,phytochemicals,pharmacological activities,toxicological aspects of the extracts and isolated compounds,as well as the in vitro propagation studies with the objective of stimulating further studies on this plant for human consumption and *** extracts have been identified in tropical regions to traditionally treat diverse conditions ranging from fever to diabetes and *** than 200 chemical compounds have been identified and isolated from this plant,the most important being alkaloids,phenols and *** in vitro studies,its extracts and phytochemicals have been characterized as antioxidant,anti-microbial,anti-inflammatory,insecticidal,larvicidal,and cytotoxic to cancer *** vivo studies have revealed anxiolytic,antistress,anti-inflammatory,immunomodulatory,antimalarial,antidepressant,gastro protective,wound healing,hepato-protective,hypoglycemic,anticancer and anti-tumoral *** silico studies have also been *** addition,clinical studies support the hypoglycemic as well as some anticancer *** of action of some pharmacological activities have been ***,some phytochemical compounds isolated from *** have shown a neurotoxic effect in vitro and in vivo,and therefore,these crude extracts and isolated compounds need to be further investigated to define the magnitude of the effects,optimal dosage,and mechanisms of action,long-term safety,and potential side ***,more clinical studies are necessary to support the therapeutic potential of this *** studies were also found to have successfully regenerated the plant in vitro,but with limited *** reported toxicity notwithstanding,*** extracts seem to be some of the safest and promising therapeutic agents of the 21st

关键词： Annona muricata Traditional medicinal uses Phytochemicals Acetogenins Bioactivity Cytotoxicity

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

Greenhouse Farming as Adaptation to Climate Change in Nigeria

引用

Journal of Agricultural Science and Technology(B) 2011年第7期1卷 943-949页

作者： Y. mijinyawa Department of Agricultural and Environmental Engineering Faculty of Technology University of Ibadan lbadan 20005 Nigeria

The effect of climate change in recent times has disrupted the onset and duration of seasons in Nigeria manifesting in the reduction of both staple and cash crops, and livestock yields. This has transformed the country to a major importer of those agricultural produce she hitherto exported. As a country where over 70% of the population depends on agriculture for survival, the impacts of climate change are a major threat to both food security and the general econoray. Remedial measures which have been suggested including adoption of agronomic and tested practices, reduced burning and afforestation. An option that could be of great potential in ameliorating this situation but which has not been practiced especially in the production of specialty crops is the use of greenhouse farming. This paper discusses the impact of climate change on Nigerian agriculture. The potentials and logistics are required for effective use of greenhouse farming as an adaptation to climate change in Nigeria. It is suggested that research should be carded out to select appropriate glazing materials. The provisions of training and credit facilities for interested farmers are recommended for effective utilization of the system.

关键词： Greenhouse climate change glazing material solar radiation.

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

Multivariate Statistical Analysis of Dominating Groundwater Mineralization and Hydrochemical Evolution in Gao,Northern Mali

引用

Journal of Earth Science 2024年第5期35卷 1692-1703页

作者： Adiaratou Traore Xumei Mao Alhousseyni Traore yahaya Yakubu Aboubacar Modibo Sidibe School of Environmental Studies China University of GeosciencesWuhan 430074China College of Construction Engineering Jilin UniversityChangchun 130012China

Population growth and expanding urbanization have caused persistent shortages and contamination of groundwater resources in Mali,*** increase in groundwater salinity makes it more difficult for residents to obtain drinking water,it is necessary to clarify the causes and control factors of groundwater mineralization in Gao region,northern *** on the analysis of the hydrochemical composition of groundwater in 24 boreholes,Piper and Sch?eller diagrams,principal component analysis(PCA)and hierarchical cluster analysis(HCA)are used to carry out multivariate statistical analysis on the main *** results show that the groundwater samples are weakly alkaline,with pH values ranging from 5.83 to 8.40,and the average values of boreholes are 7.50,*** average electrical conductivity(EC)value is 354.4(μS/cm),and the extreme value is between 124.0 and 1247(μS/cm).Water is usually mineralized and presents nine types of water *** three principal components explain 84.42%of the total variance for 13 *** factor F1(58.85%),the factor F2(16.88%)and the factor F3(8.69%)present for the majority of the total data *** addition,multivariate statistical analysis confirmed the genetic relationship among aquifers and identified three main *** related to groundwater mineralization(F1),clustering related to oxide reduction and iron enrichment(F2),and clustering of groundwater pollution caused by nitrate and magnesium(F3).We found that agriculture,weathering activities and dissolution of geological materials promote the mineralization of *** quality in the Gao region is becoming less and less potable because of increasing salinity.

关键词： hydrochemical composition multivariate statistical analysis mineralization hydro-chemical evolution Gao northern Mali hydrogeology

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

SUSTAINABILITY OF OFF-SITE CONSTRUCTION:A BIBLIOMETRIC REVIEW AND VISUALIZED ANALYSIS OF TRENDING TOPICS AND THEMES

引用

Journal of Green Building 2020年第4期15卷 131-153页

作者： Ibrahim yahaya Wuni Geoffrey Qiping Shen Robert Osei-Kyei Department of Building and Real Estate The Hong Kong Polytechnic University11 Yuk Choi RoadHung HomKowloonHong Kong School of Computing Engineering and Mathematics Western Sydney UniversitySydneyAustralia

Off-site construction(OSC)involves the fabrication and assembly of building com-ponents in a purpose-built factory which are then transported to the job site for final *** has proven to be a greener construction approach,spurring research towards benchmarking the sustainable attributes of the ***,a quantitative statistical analysis of studies on OSC sustainability and a framework of the knowledge domain are not *** on 642 bibliographic records from Scopus,this paper conducted a bibliometric and visualized analysis of research on the sustainability of OSC from 1971 to *** findings show that research publications on OSC sustainability only witnessed steady growth since 2000.A geospatial analysis revealed that at least 32%of countries are involved in the OSC sustainability research,of which the United States,China,Australia,the United Kingdom,and Canada make the greatest *** hot topics in the contemporary OSC sustainability research were identified as embodied carbon,embodied energy,construction waste,post-occupancy evaluation,resources conserva-tion,and recycling,and cost *** paper identified areas that require further ***,the paper offers an all-embracing understanding of the core research themes,trends,and patterns on OSC sustainability to stakeholders.

关键词： bibliometric bibliographic off-site construction sustainability

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

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：