检索结果-南通市图书馆

FlowBreakdown of Hybrid Nanofluid on a Rigid Surface with Power Law Fluid as Lubricated Layers

Computer Modeling in Engineering & Sciences 2024年第2期138卷 1485-1499页

作者： Mirza Naveed jahangeer Baig NadeemSalamat Sohail Nadeem NaeemUllah Mohamed Bechir Ben Hamida Hassan Ali Ghazwani Sayed M.Eldin A.S.Al-Shafay Instituite of Mathematics Khwaja Fareed University of Engineering and Information TechnologyRahim yar Khan64200Pakistan Department of Mathematics Quaid-I-Azam UniversityIslamabad44000Pakistan Department of Mathematics Wenzhou UniversityWenzhou325035China College of Engineering Department of Mechanical EngineeringImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11564Saudi Arabia Research Laboratory of Ionized Backgrounds and Reagents Studies(EMIR) Preparatory Institute for Engineering Studies of Monastir(IPEIM)University of MonastirMonastir5060Tunisia Higher School of Sciences and Technology of Hammam Sousse Department of PhysicsJazan82511Kingdom of Saudia Arabia Department of Mechanical Engineering Faculty of engineeringJazan UniversityP.O.Box 45124JazanKingdom of Saudia Arabia Center of Research Faculty of EngineeringFuture University in EgyptNew Cairo11835Egypt Department of Mechanical Engineering College of EngineeringPrince Sattam bin Abdulaziz UniversityAlkharj16436Saudi Arabia

Thiswork investigates an oblique stagnation point flowof hybrid nanofluid over a rigid surface with power lawfluidas lubricated layers. Copper (Cu) and Silver (Ag) solid particles are used as hybrid particles acting in water H2O asa base fluid. The mathematical formulation of flow configuration is presented in terms of differential systemthat isnonlinear in nature. The thermal aspects of the flow field are also investigated by assuming the surface is a heatedsurface with a constant temperature T. Numerical solutions to the governing mathematical model are calculatedby the RK45 algorithm. The results based on the numerical solution against various flow and thermal controllingparameters are presented in terms of line graphs. The specific results depict that the heat flux increases over thelubricated-indexed parameter.

关键词： Oblique stagnation point flow hybrid nanofluid lubricated layer magnetohydrodynamics

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

Ethnomedicinal knowledge of indigenous communities and pharmaceutical potential of rainforest ecosystems in Fiji Islands

引用

Journal of Integrative Medicine 2019年第4期17卷 244-249页

作者： Shipra Shah jahangeer A.Bhat Department of Forestry College of Agriculture Fisheries and Forestry Nausori Fiji National University

The World Health Organization recently raised concerns about antimicrobial resistance and lack of novel antibiotics in the health sector. The success rate of drug discovery is higher when chemical constituents are sourced from natural products and when drug candidates are based on the indigenous knowledge of local communities. Tropical rainforests are an important source of medicinal plants for traditional healthcare systems. The pharmaceutical industry also recognizes the potential of rainforests in novel drug development. However, habitat degradation and loss of traditional knowledge are endangering the healing powers of nature. The islands of Fiji have a rich cultural history of traditional medicine and a number of medicinal plants are sourced from the country's rainforest ecosystems. While deforestation and forest degradation are decimating unique rainforest biodiversity and reducing access to medicinal plants in the wild, inter-generational erosion of ethnobotanical knowledge is attributed to acculturation, rural-urban migration and their effects on the transmission of oral traditions from one generation to another. Under these conditions, plants may disappear before their therapeutic value is formally identified. This review summarizes the importance of traditional medicinal knowledge and the potential for drug discovery from the tropical rainforest ecosystems of Fiji. However, there are several challenges that need to be addressed to realize the true potential of ethnopharmacology in this country.

关键词： Medicinal plants Rainforest Ethnomedicine Traditional knowledge Fiji Islands Drug discovery

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

Endoscopic management of pancreatic fluid collectionsrevisited

引用

World Journal of Gastroenterology 2017年第15期23卷 2660-2672页

作者： Zaheer Nabi jahangeer Basha D Nageshwar Reddy Department of Gastroenterology Asian Institute of Gastro-enterology

The development of pancreatic fluid collections(PFC) is one of the most common complications of acute severe pancreatitis. Most of the acute pancreatic fluid collections resolve and do not require endoscopic drainage. However, a substantial proportion of acute necrotic collections get walled off and may require drainage. Endoscopic drainage of PFC is now the preferred mode of drainage due to reduced morbidity and mortality as compared to surgical or percutaneous drainage. With the introduction of new metal stents, the efficiency of endoscopic drainage has improved and the task of direct endoscopic necrosectomy has be-come easier. The requirement of re-intervention is less with new metal stents as compared to plastic stents. However, endoscopic drainage is not free of adverse events. Severe complications including bleeding, perforation, sepsis and embolism have been described with endoscopic approach to PFC. Therefore, the endoscopic management of PFC is a multidisciplinary affair and involves interventional radiologists as well as GI surgeons to deal with unplanned adverse events and failures. In this review we discuss the recent advances and controversies in the endoscopic management of PFC.

关键词： Endotherapy Pseudocyst Pancreatic necrosis Necrosectomy

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

In-situ observation and transport modelling of arsenic in Gangetic plain,India

引用

Emerging Contaminants 2017年第4期3卷 138-143页

作者： Pankaj Kumar Gupta Pranjay Joshi jahangeer Department of Hydrology Indian Institute of Technology Roorkee247667UttarakhandIndia Department of Soil and Water Conservation G.B.Pant University of Agriculture&TechnologyPantnagar263145UttarakhandIndia University of NebraskaeLincoln NebraskaLincolnNE68588USA

The focus of this study is to investigate the arsenic movement and impacts on the residual concentrations on groundwater pollution *** Gangetic plain area in the Ballia,Uttar Pradesh is selected as study area,which is also reported to extreme arsenic pollution in soil-water system.A modelling approach is developed to assess the arsenic flux in partially saturated zone using data of soil texture,soil hydraulic properties and *** type,slope,and land-use cover is considered for estimating the transient flux at the top boundary from daily precipitation and evapotranspiration data of the study *** transport in the subsurface is predicted by the mass transfer equation,which is derived by integrating Darcy's law with the equation of mass *** arsenic profiles of varying hydrogeological conditions associated with different locations in the study area are presented as breakthrough *** results shows that the arsenic transport is dominated by the advective flux and strongly depends on the soilmoisture flow *** may increases the arsenic load to underlaying groundwater *** simulated results suggest that mobility plays a vital role arsenic transport as well as on adsorbed arsenic concentration in ***,the adsorption isotherms show that the high peak curve for Bairai and low at Sikarderpur.A higher pollution risk is observed in the Belthara Road,whereas a lower vulnerability is computed in the north and northeast *** study can help in strategising sustainable groundwater management and protection planning of identified regions of India.

关键词： Arsenic transport Adsorption Subsurface Sustainable groundwater 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

Wood specific gravity of some tree species in the Garhwal Himalayas, India

引用

Forestry Studies in China 2011年第3期13卷 225-230页

作者： Mehraj A.SHEIKH Munesh KUMAR jahangeer A.BHAT Department of Forestry and Natural Resources HNB Garhwal University (A Central University)Srinagar Garhwal Uttarakhand India

Estimation of terrestrial biomass depends critically on reliable information about wood specific gravity of forest trees. In recent years, wood specific gravity has become more important when exploring the universality of functional traits of plants and estimating their global carbon stocks. To estimate their specific gravity, wood samples were collected from a total of 34 tree species, 30 from lower elevations and 4 from upper elevations in the Garhwal Himalayas, India. The results show that the average wood specific gravity was 0.631 （ranging between 0.275 ± 0.01 and 0.845 ± 0.03） for the species at lower elevations and 0.727 （ranging between 0.628 ± 0.02 and 0.865 ± 0.02） for the upper elevations. The average wood specific gravity for the upper elevation species was 9.6% greater than that for the species at lower elevations. Aegle marmelos among the lower elevation species and Quercus leucotrichophora among the upper elevation species had the highest wood specific gravity, which were 0.845 ± 0.03 and 0.865 ± 0.02, respectively.

关键词： specific gravity biomass elevation

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

Forest structure, diversity and regeneration in unburnt and burnt Anogeissus latifolia forests in Garhwal Himalayas

引用

Forestry Studies in China 2012年第4期14卷 268-275页

作者： Munesh KUMAR jahangeer A. BHAT G. S. RAJWAR Department of Forestry and Natural Resources HNB Garhwal University Department of Botany Government Post Graduate College

The present study was carried out at two different gradients of unbumt and burnt Anogeissus latifolia forest sites in the Garhwal region, India. At each gradient, the unburnt and burnt forest sites were further categorized into three different elevations, i.e., lower （700 m）, middle （850 m） and upper （1000 m）. At each elevation, the density of trees, saplings and seedlings was higher at the unburnt sites except for trees at the upper elevation which was higher at the burnt sites. The total basal area of each layer of for- est was also higher at the unburnt sites. The study revealed that the lower number of saplings and seedlings at the burnt forest sites might be due to the effect of fire. Most trees in the lower dbh classes were affected by forest fire at the burnt sites which reduced the total density and total basal area of the trees compared to the unburnt sites. The diversity of trees increased with increasing elevation. However, the diversity of saplings and seedlings reduced with increasing elevation.

关键词： Anogeissus latifolia unburnt and burnt forest elevational gradient diversity regeneration

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

磁流体动力压缩黏性流体在多孔介质中的流动分析

引用

Journal of Central South University 2023年第3期30卷 844-854页

作者： HUSSAIN Shafqat ATIF Shahzada M. SAGHEER Muhammad jahangeer Ibraheem Department of Mathematics Statistics and PhysicsCollege of Arts and SciencesQatar UniversityP.O.Box 2713DohaQatar Department of Mathematics Capital University of Science and TechnologyIslamabadPakistan

本文通过数值分析,讨论了倾斜磁场效应下压缩黏性流体流动特征的意义。对于高效传热现象,温度方程中还考虑了黏性耗散和焦耳热效应。利用打靶法求解了无量纲守恒方程。对模型中所考虑的特定参数对流体运动、传热能量分配率和表面阻力系... 详细信息

本文通过数值分析,讨论了倾斜磁场效应下压缩黏性流体流动特征的意义。对于高效传热现象,温度方程中还考虑了黏性耗散和焦耳热效应。利用打靶法求解了无量纲守恒方程。对模型中所考虑的特定参数对流体运动、传热能量分配率和表面阻力系数的行为进行了图解和详细讨论。倾斜磁场效应对流体速度和换热速率的影响非常重要。从模拟结果可知,当普朗特常数从1增加到5时,热传导率增加了56%,而当倾斜磁参数γ从π/8增加到π/2时,热传导率下降了9.7%。实验还发现,随着挤压参数的增大,换热速率减小,而下板拉伸参数的增大则趋势相反。

关键词：挤压流黏性流体磁流体动力流吸/注射

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

Human-wildlife conflict:A bibliometric analysis during 1991–2023

引用

区域可持续发展(英文) 2023年第3期4卷 309-321页

作者： Qamer RIDWAN Zishan Ahmad WANI Nahila ANJUM jahangeer Ahmad BHAT Mohd HANIEF Shreekar PANT Applied Ecology Lab Department of BotanyBaba Ghulam Shah Badshah UniversityRajouri185234India Conservation Ecology Lab Department of BotanyBaba Ghulam Shah Badshah UniversityRajouri185234India Piramal Foundation for Education Leadership Srinagar190001India Centre for Biodiversity Studies Baba Ghulam Shah Badshah UniversityRajouri185234India

The escalating conflict between human and wildlife due to competing demands for limited space and resources has raised concerns worldwide,and understanding the dynamics of this conflict is crucial for devising effective strategies and *** present study is an attempt to carry out a bibliometric analysis of the published literature on the topic of human-wildlife conflict(HWC)for the period of January 1991–February *** carrying out the analysis of the data obtained from Web of Science,the‘Bibliometrix'tool,developed through the R programming language,was *** findings of the study revealed that a total of 1592 documents have been published on the HWC research topic from January 1991 to February 2023 within 338 *** is observed that the number of publications has continuously increased since 1991,with an annual growth rate of 5.16%.A total of 4995 authors have contributed to the targeted research *** the 388 sources,the journal‘Biological Conservation'is the most relevant and productive,followed by‘Oryx'and‘Human Dimensions of Wildlife'.Based on the country production analysis,authors from 110 countries have contributed to the field,and the USA has the highest frequency of publications on HWC,followed by the UK and *** USA also has the highest multiple country publications and has collaborated with 88 countries,with the highest frequency of collaboration with the UK,followed by India,Australia,and South *** most frequently used keywords include‘human-wildlife conflict',‘conservation',‘conflict',‘human-wildlife',‘wildlife',‘wildlife management',‘livestock',‘management',‘coexistence',and‘carnivore'.The present study identifies the most prolific authors,sources,institutions,and countries,as well as the study hotspots in the subject of HWC,which may assist researchers in finding the best working and publication ***,it may also help them identify reliable research partners to acquire the best findings and develop mo

关键词： Bibliometrix Human-wildlife conflict Carnivore Wildlife management Coexistence Collaboration analysis

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

Carbon stock of trees along an elevational gradient in temperate forests of Kedarnath Wildlife Sanctuary

引用

Forestry Studies in China 2013年第2期15卷 137-143页

作者： jahangeer A. BHAT Kaiser IQBAL Munesh KUMAR A. K. NEGI N. P. TODARIA Department of Forestry and Natural Resources H.N.B. Garhwal University Srinagar (Garhwal)Uttarakhand 249161 India

The estimation of carbon density of high altitude forests was carried out at five different sites along an elevational gradient from 1550 m to 3550 m in a part of Kedarnath Wildlife Sanctuary, which is one of the largest protected areas of the Garhwal Himalaya, India. Among the study sites the above ground biomass density （AGBD） ranged from 202.72 Mg·ha^-1 （Site 5） to 718.75 Mg·ha^-1 （Site 1） and below ground biomass density （BGBD） from 61.00 Mg·ha^-1 （Site 5） to 203.04 Mg·ha^-1 （Site 1）. The total biomass density （TBD） also followed similar trend, where the lowest value （263.73 Mg·ha^-1） was observed at Site 5 and the highest （921.79 Mg·ha^-1） at Site 1. The total carbon density （TCD） ranged from 131.86 Mg·ha^-1 （Site 5） to 460.89 Mg·ha^-1 （Site 1）, which indicates that the carbon density of forests reduces with increasing elevation.

关键词： carbon density Himalaya elevation sanctuary

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

Diversity and regeneration status of Sarkot Van Panchyat in Garhwal Himalaya, India

引用

Journal of Forestry Research 2012年第3期23卷 399-404页

作者： Nazir A.Pala A.K.Negi Yogesh Gokhale jahangeer A.Bhat N.P.Todaria Department of Forestry and Natural Resources Chauras Campus HNB Garhwal University Srinagar Garhwal Uttarakhand P.Box-59India The Energy and Resources Institute(TERI)New Delhi-Darbari SethBlock Habitat Place Lodhi RoadNew Delhi-110003India

We investigated the floristic composition, phytosociological and regeneration status of Sarkot Van Panchyat （community forest） in Chamoli district of Garhwal Himalaya. A total of 52 plant species of 46 genera and 26 families were recorded, which included 12 trees, 18 shrubs and 22 herb species. Quercus leucotrichophora was dominant tree species in sapling and seedling layers, followed by Lyonia ovalifolia and Rhododendron arboreum. Out of 12 tree species, 7 species in seedling stage and 8 species in sapling stage were recorded in the study area. The 44.41% species in the study area showed good regeneration status, 16.66% species were fairly regenerating, and 8.33% species showed poor regeneration status, while 33% species were not regenerating. Number of individuals from lower girth classes （0--10 cm and 10-30 cm） showed decreasing trend with the increase in size of girth class. Shannon index （H） for trees, shrubs and herbs was recorded as 1.82, 2.24 and 2.41 respectively. Simpsons index （Co） was recorded as 0.21, 0.12 and 0.12 for trees, shrubs and herbs respectively. The forest should be di- vided into compartments for better management purpose and each compartment should be closed for five years to assist regeneration and enrichment planting may also be carried out for sustainable management.

关键词： traditional forests regeneration dominant Garhwal Himalaya composition

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：