检索结果-南通市图书馆

Stand dynamics of old-growth hemlock forests in central Bhutan are shaped by natural disturbances

Forest Ecosystems 2024年第4期11卷 434-447页

作者： Karma Tenzin Craig R.Nitschke Kathryn J.Allen Raphael Trouve Thiet V.Nguyen patrick J.Baker School of Agriculture Foodand Ecosystem SciencesUniversity of Melbourne500 Yarra BlvdRichmondVictoriaAustralia School of Geography Planningand Spatial SciencesUniversity of TasmaniaSandy BayTasmaniaAustralia Forest Science Institute of South Vietnam 1 Pham Van Hai StreetTan Binh DistrictHo Chi Minh CityViet Nam

Understanding how past disturbances have influenced the development of forests is critical for deciphering their current structure and composition and forecasting future *** this study,dendrochronological methods were applied to uncover the disturbance history of old-growth hemlock-dominated forests in central *** of tree-ring samples from two old-growth hemlock stands,located in two different topographic settings,identified the importance of gap-phase dynamics in facilitating recruitment and growth releases and producing complex,multi-aged structure s over *** site showed evidence of a near stand-replacing disturbance in the late 1700s,while the other showed no evide nce of high-severity disturbance at any time over the last 400 *** both sites low-to medium-severity disturbances,some of which appear to be associated with cyclones originating in the Bay of Bengal,dominated the disturbance *** hemlock stands exhibited a significant positive association between cyclone occurrence and growth release events and between recruitment pulses and growth release *** 1800 to 1970 there was an increase in recruitment of angiosperm tree species at most sites and a corresponding decline in conifer *** the past 50 years there has been little new recruitment;this may be due to light limitation in the understory from shade-tolerant angiosperms and bamboo in the lower strata of these *** variations in disturbance dynamics and recruitment were observed across the study sites,suggesting that other factors,such as topography and climate,may be influencing long-term stand development *** study highlights the complex interplay between historical disturbance regimes and tree recruitment in shaping the age and size structures of old-growth hemlock forests in central *** also provides new insights into the dynamics of these forests that can be used to support effective forest conservation and management i

关键词： Forest structure Hemlock forest Himalaya Natural disturbance

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 submucosal dissection and endoscopic mucosal resection for esophageal and gastric lesions:A comparison of procedures

引用

Laparoscopic, Endoscopic and Robotic Surgery 2024年第2期7卷 66-71页

作者： Gustav Holm Schæbel Andreas Weise Mucha Charlotte Egeland Michael patrick Achiam Department of Surgery and Transplantation Copenhagen University Hospital RigshospitaletBlegdamsvej 92100 CopenhagenDenmark

Objective Esophageal and gastric lesions are effectively managed with minimally invasive upper endoscopic procedures such as endoscopic mucosa resection(EMR)and endoscopic submucosal dissection(ESD),offering patients alternatives to invasive *** ESD is well established in Eastern Asia,its adoption in Denmark for superficial esophageal cancer is *** study presents real-world data on the feasibility,safety,and hospitalization duration associated with ESD and EMR for esophageal and gastric *** A retrospective analysis was conducted on patients who underwent ESD or EMR at a specialized center in Denmark from October 2016 to June *** on treatment,indication,lesion location,hospitalization duration,procedure duration,specimen size,complications,recurrence,and one-year overall survival were *** comparisons utilized the Mann-Whitney U test,independent sample median test,and chi-squared *** The study included 130 patients(144 procedures):72 underwent ESD and 58 underwent *** with EMR,ESD resulted in greater percentages of en bloc and R0 resections(98.8%vs.64.1%,p<0.001;and 83.9%vs.23.8%,p<0.001),greater complication rates(28.7%vs.3.1%,p<0.001)and longer procedure times(119.5 min vs.37.0 min,p<0.001).The ESD procedure time significantly decreased over time(p=0.01).The local recurrence rates were 14.5%for ESD and 23.8%for EMR(p=0.767).The one-year overall survival rates were similar between the groups(95.8%vs.94.8%,p=0.553).Conclusion Both ESD and EMR are safe and viable for treating esophageal and gastric *** offers advantages but requires more time and *** findings support the literature,emphasizing the importance of considering patient-specific factors and surgeon proficiency in selecting the appropriate procedure.

关键词： Endoscopic submucosal dissection Endoscopic mucosa resection Gastroesophageal cancer Real-world data

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

Acetabular cup size trends in total hip arthroplasty

引用

World Journal of Orthopedics 2024年第1期15卷 39-44页

作者： Daniel patrick McKenna Alex Price Timothy McAleese Darren Dahly Paul McKenna May Cleary Department of Trauma and Orthopaedics University Hospital WaterfordWaterford X91 ER8EIreland Department of Epidemiology and Public Health University College CorkCork T12 XF62Ireland

BACKGROUND Total hip arthroplasty(THA)is a common procedure for end stage *** learning curve for THA is complex and *** of the most difficult skills to master is acetabular *** wish to identify if experience in arthroplasty leads to preservation of more bone *** To investigate if increasing surgeon experience will predict an ever decreasing acetabular cup *** A retrospective case series of four attending orthopaedic surgeons was *** uncemented elective total hip arthroplasties since appointment were selected for *** size of acetabular cup used was noted and logistic regression was used to identify if a trend to smaller cups *** A total of 1614 subjects were included with a mean age of 64 *** cups were on average 0.18mm smaller per year(95%confidence interval-0.25 to-0.11,P<0.001).Individual surgeon trends showed cup sizes to decrease 0.27 mm/year for surgeon A,0.02 mm/year for surgeon B,0.15 mm/year for surgeon C and 0.29 mm/year for surgeon *** of the four surgeons had a more pronounced trend to smaller cups for male subjects than their female *** We found increasing surgeon experience to be associated with an ever-decreasing acetabular cup *** acetabular cup size may act as a surrogate marker of surgical proficiency by virtue of decreased acetabular reaming.

关键词： Hip Arthroplasty Acetabulum Cup Learning

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

What Knowledge is of Most Worth?Considering the Neo-Confucians in the Contemporary Debate Between Moral and Intellectual Learning

引用

ECNU Review of Education 2024年第1期7卷 155-163页

作者： John patrick Shekitka Manhattanville College

●The perennial debate regarding the relative usefulness of various forms of knowledge,especially between the theoretical and practical and the intellectual and moral,lies at the heart of education in both past and present times in both the West and China(de Bary,1988,2004,2005,2015).●Neo-Confucians remain relevant in the 21st century and can help us to understand and elucidate contemporary debates in education-specifically,to answer the question Spencer asked nearly a century and a half ago:"What knowledge is of most worth?".●Mencius,Zhu Xi,Wang Yangming,Xu Ai,and Kang Youwei advocated for a type of learning that would strongly resonate with John Dewey(1938)and Paulo Freire(1970,1978).Foundational philosophies of education,particularly in the United States,have drawn heavily on 20th century European-American thinkers;this article attempts to correct this myopia and broaden perspectives.

关键词： Freire John Dewey Neo-Confucian

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

Comprehensive evaluation framework for intervention on health effects of ambient temperature

引用

Eco-Environment & Health 2024年第2期3卷 154-164页

作者： Jiaming Wang Peng Wang Beibei Liu patrick L.Kinney Lei Huang Kai Chen State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Faculty of Civil Engineering and Mechanics Jiangsu UniversityZhenjiang 212013China Department of Environmental Health Boston University School of Public HealthBostonMA 02118USA Center for Public Health Research Medical School of Nanjing UniversityNanjing 210093China Department of Environmental Health Sciences Yale Center on Climate Change and HealthYale School of Public HealthNew HavenCT 06510USA

Despite the existence of many interventions to mitigate or adapt to the health effects of climate change,their effectiveness remains ***,we introduce the Comprehensive Evaluation Framework for Intervention on Health Effects of Ambient Temperature to evaluate study designs and effects of intervention *** framework comprises three types of interventions:proactive,indirect,and direct,and four categories of indicators:classification,methods,scope,and *** trialed the framework by an evaluation of existing intervention *** evaluation revealed that each intervention has its own applicable characteristics in terms of effectiveness,feasibility,and generalizability *** expanded the framework's potential by offering a list of intervention recommendations in different *** applications are then explored to establish models of the relationship between study designs and intervention effects,facilitating effective interventions to address the health effects of ambient temperature under climate change.

关键词： Intervention Evaluation framework Ambient temperature Climate change Human health Evaluation practice

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

多孔灰岩局部化变形的精细化描述与数字表征

引用

大地构造与成矿学 2024年第3期48卷 547-556页

作者：武岳彪孟范宝王岳军 patrick Baud 黄庭芳中山大学地球科学与工程学院广东珠海519082 香港中文大学理学院地球与环境科学课程中国香港999077 Universitéde Strasbourg CNRSInstitute Terre et Environnement de StrasbourgUMR 70635 Rue RenéDescartesStrasbourg cedex 67084France Department of Geosciences Stony Brook UniversityStony Brook NY 11794USA

压实带是一种典型的应变局部化现象,影响储层流体的封存、输运以及地下岩体的稳定性。多孔灰岩局部化变形的相关研究一直是难点,不像砂岩样品可以通过明显的声发射信号特征来分析与表征压实带的形成与演化规律。本文利用动态CT技术,实... 详细信息

压实带是一种典型的应变局部化现象,影响储层流体的封存、输运以及地下岩体的稳定性。多孔灰岩局部化变形的相关研究一直是难点,不像砂岩样品可以通过明显的声发射信号特征来分析与表征压实带的形成与演化规律。本文利用动态CT技术,实时监测灰岩局部化变形到宏观失稳的演化过程,重点描述压实带形成初期的局部化变形特征,涵盖了应变量>5%的变形部分特征。在灰岩变形过程中可以识别两处明显非弹性变形阶段:即初始大孔隙坍塌阶段和后续压实带形成过程,利用图像体积互相关技术定量表征压实带的演化特征,精细化描述压实带形成过程的微观破裂特征,系统分析离散压实带内的连通孔隙分布规律,发现连通孔隙与局部化变形有紧密联系,并基于CT扫描的孔隙网络数据,利用纳维斯特斯方程计算绝对渗透率,以渗透率为参考指标,研究局部化变形引起的损伤程度。

关键词：局部化变形 CT技术灰岩孔隙网络

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

Low phase noise K-band signal generation using polarization diverse single-soliton integrated microcombs

引用

Photonics Research 2024年第6期12卷 1175-1185页

作者： ALWALEED ALDHAFEERI HSIAO-HSUAN CHIN TRISTAN MELTON DONG IL LEE ALLEN CHU WENTING WANG MINGBIN YU patrick GUO-QIANG LO DIM-LEE KWONG CHEE WEI WONG Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory University of CaliforniaLos AngelesCalifornia 90095USA Institute of Microelectronics A*STARSingapore 117865Singapore State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technologyand Shanghai Industrial Technology Research InstituteShanghai 200050China

Frequency microcombs with microwave and millimeter-wave repetition rates provide a compact solution for coherent communication and information *** implementation of these microcombs using a CMOS-compatible platform further paves the way for large-scale photonic integration and ***,we demonstrate free-running soliton microcombs with K-band repetition rates with very low phase noise over a 4 GHz pump detuning range reaching−117(−123)dBc/Hz at 10 kHz offset for a 19.7(10)GHz carrier without active pump stabilization,exceeding commercial electronic microwave oscillators at frequency offsets above 40 *** minimum laser noise to soliton microwave signal transduction factor observed is−*** noise performance is achieved using a hybridized dual-mode for soliton generation to achieve passive thermal stabilization and minimal soliton spectrum shift from prior Raman scattering and dispersive wave *** further examine the locking of the repetition rate to an external ultrastable photonic oscillator to illustrate the feasibility of phase noise suppression below the thermorefractive noise limits of microresonator frequency combs.

关键词： pump polarization millimeter

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

Getting persuasive about the non-invasive:assessing liver fibrosis in practice-without a biopsy

引用

Hepatobiliary Surgery and Nutrition 2024年第5期13卷 879-881页

作者： Nida Ansari patrick Twohig Department of Internal Medicine St.Joseph’s University Medical CenterPatersonNJUSA Division of Gastroenterology and Hepatology University of Rochester Medical CenterRochesterNYUSA

Chronic liver disease(CLD)is the 10th leading cause of death in the United States(1,2).The early detection of liver fibrosis is crucial in minimizing disease progression and risk of death(2).While the gold standard for diagnosis is liver biopsy,it is invasive,costly,and less accessible than non-invasive fibrosis assessment tools which utilize blood work and/or imaging(2,3).The growing prevalence of CLD emphasizes the importance of noninvasive liver disease assessments(NILDA),with the availability of blood base and imaging assessments(3).

关键词： Hepatic fibrosis liver biopsy cirrhosis biomarker

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

Reinforcing of Citizen’s Trust in E-Government: The Cameroon’s Case

引用

Journal of Computer and Communications 2024年第1期12卷 77-109页

作者： patrick Dany Bavoua Kenfack Check Njei Department of Electrical and Telecommunications Engineering National Advanced School of Engineering of Yaounde University of Yaounde I Yaounde Cameroon

The embracing of ICTs and related technologies has enhanced different approaches for governments worldwide to deliver services to their citizens in a smart way. However, the usage of e-government services by common citizens is recognized as one of the major setbacks of e-government development in both developed and developing countries. Moreover, government agencies in these countries are facing great challenges in keeping the citizens motivated enough to continue to use e-government services. This research aims to investigate the factors that influence citizens’ trust towards continue use of e-government services in Cameroon. The proposed research model consisted of three main constructs including technological, governmental, risk factors as well as six demographic characteristics (age, gender, educational level, income, internet experience and cultural perception). A five-point Likert scale questionnaire was designed to collect data physically and electronically, 352 valid questionnaires were retrieved. Simple and Multiple regression analysis methods were applied to build an adequate model based on the verification of hypotheses proposed. Based on results obtained, four demographic characteristics (age, education, occupation and income) have influence on citizens’ trust in e-government meanwhile gender and cultural affiliation have no influence. Furthermore, technological factors and governmental factors positively influence trust level in e-government, whereas risk factors have a negative influence on trust level. Deducing from the results, a list of recommendations is proposed to the government of Cameroon in order to reinforce citizens’ trust in e-government services.

关键词： E-Government Risk Factors Technological Factors Governmental Factors Trust Linear Regression

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

The Impact of Solid Waste Generation, Storage and Separation Practices among Households on the Environment in Freetown

引用

Journal of Geoscience and Environment Protection 2024年第8期12卷 219-238页

作者： Abdul Malik Bangura patrick Fayia Kanty College of Environmental Science and Engineering Tongji University Shanghai China

As urbanization and population growth continue to increase in Freetown, due to changes in economic, social, environmental, political, and demographic factors, the municipal solid waste (MSW) generation also continues to increase, making its management difficult for the municipal authority. Efficient separation and storage of solid waste at the source of generation can boost resource and energy recovery from MSW. This study examines the municipal solid waste management (MSWM) process, focusing on generation, storage and separation practices among households and their impact on the environment in Freetown. It emphasizes the inclusion of MSWM programs in primary schools to raise public awareness, the implementation of effective waste management practices, and the enforcement of related policies to enhance the MSWM sector, contributing to sustainable MSWM in Freetown. By utilizing both qualitative and quantitative methods, 393 structured questionnaires were administered across three selected sections to collect data on household solid waste storage and separation practices. The analysis employed descriptive statistics, using Origin-Pro9 and MS Excel. The findings show that with a population of 1.53 million people in Freetown, the per capita solid waste generation is 0.58 kg per day. The findings also show that 97% of the households have storage facilities as a result of the increase in awareness and education about the proper storage of solid waste. However, 96% of respondents do not practice separation of solid waste at the source of generation, which has become a concern among researchers in Sierra Leone. Additionally, 88% of respondents are unaware of ISWM principles, with only 12% aware, most of whom have received some education on proper solid waste management. The study recommends improving MSWM in Freetown to protect public health and the environment.

关键词： Generation Storage Separation Household Municipal Solid Waste Freetown

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：