检索结果-南通市图书馆

Determinants of Sexual Activity among HIV-Infected Adolescents in Cameroon

Open Journal of Pediatrics 2024年第5期14卷 921-936页

作者： Calixte Ida Penda rachel fotso yogue Nelly Noubi Kamgaing Sena Mouna Penda Loïc Boupda Francis Atéba Ndongo Christian Eyoum Ritha Mbono Betoko Grace Dalle Ngondi Patricia Epee Eboumbou Francisca Monebenimp Essome Henri Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon General Hospital of Douala Douala Cameroon Faculty of Medicine and Biomedical Sciences University of Yaound 1 Yaound Cameroon University Hospital Centre of Yaound Yaound Cameroon Mokolo Regional Hospital Annex Mokolo Cameroon University of Garoua Garoua Cameroon Mother and Child Centre of the Chantal Biya Foundation in Yaound Yaound Cameroon Douala Laquintinie Hospital Douala Cameroon District Hospital of Bonassama Douala Cameroon

Introduction: Adolescence is a period of transition to adulthood, including for HIV-infected adolescents (HIA), when sexual problems emerge. Few studies have been carried out on the sexuality of HIA. This study aimed to assess the sexual behavior of HIV-infected adolescents in Cameroon. Methodology: A cross-sectional study was conducted in three hospitals in the cities of Yaoundé and Douala, from November 2019 to June 2020. All HIA aged 13 to 19 years followed in the study who knew their HIV status were included in the study after obtaining their assent and their parent’s consent. Socio-demographic and clinical characteristics were collected, as well as sexual practices and the determinants of their sexual activity. A multivariate analysis was performed to explore the relationship between the different variables studied and the sexual activity of these adolescents. Results: Of 204 HIA enrolled in the study, 64 (31.7%) were sexually active, the mean age at first sexual intercourse was 15.6 ± 2.8 years and the sex ratio was 0.94. Of the adolescents in the study, 75.7% of girls and 61.2% of boys had regular sexual activity, while 21.3% of girls and 35.4% of boys had multiple sexual relationships in the six months preceding the study. Nearly 16 (25.0%) of the sexually active HIA had more than 2 sexual encounters per month, 6 (9.3%) of these encounters had been paid for and 9 (27.2%) of the girls had already had at least one pregnancy. More than 7 out of 10 HIA (79.6%) had used a condom the last time they had sex. Age less than 18 years [OR = 11.1 (95% CI: 3.1 - 39.4), p = 0.001], lack of remuneration [OR = 9.8 (95% CI: 2.0 - 47.4), p = 0.001] and self-care were significantly associated with sexual activity in HIA, while school attendance was a protective factor. Self-funded HIAs were 21 times more likely to be sexually active [OR = 21.6 (95% CI: 2.3 - 179), p = 0.004]. Conclusion: More than a third of HIV-infected adolescents were sexually active and risky sexual practi

关键词： HIV Adolescent Sexual Behavior Cameroon

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

Stochastic-periodic Homogenization of Maxwell＇s Equations with Linear and Periodic Conductivity

引用

Acta Mathematica Sinica,English Series 2017年第1期33卷 117-152页

作者： Joel fotso TACHAGO Hubert NNANG Faculty of Science Department of Mathematics and Computer Science University of Bamenda P. O. Box 39 Bambili Cameroon Higher Teachers Training College University of Yaounde I P. O. Box 47 Yaounde Cameroon

Stochastic-periodic homogenization is studied for the Maxwell equations with the linear ＂and periodic electric conductivity. It is shown by the stochastic-two-scale convergence method that the sequence of solutions t... 详细信息

关键词： Maxwell's equations dynamical system stochastic two-scale convergence

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

THE GREENING OF THE PARKING INDUSTRY–BEST PRACTICES,AND A NEW CERTIFICATION PROGRAM FOR PARKING STRUCTURES

引用

Journal of Green Building 2014年第4期9卷 61-77页

作者： rachel Yoka Program Development International Parking Institute

Sustainable building design is now *** United States Green Building Council(USGBC)and the LEED Ratings Systems have moved the market,proving that“a rising tide lifts all boats.”Consumers now factor environmental effect into their buying decisions,a trend that looks to continue and intensify with the millennial *** and homeowners are willing to pay more for high-performing and better quality housing based on environmental *** recognize that indoor air quality and daylighting improve employee performance and boost retention *** even bottom-line businesses are investing in benchmarking and efficiency projects that have the right return on investment *** Urban Land Institute’s Greenprint Center for Building Performance serves as a prime example of the ways developers implement benchmarking,energy efficiency,and high-performance standards in the major real estate sectors:office,retail,industrial,multifamily,and *** efficiency gains and higher-quality buildings in each of these sectors will be essential to reducing emissions and energy *** the transportation sector implements its own standards and benchmarking tools to achieve greater levels of sustainability across all modes of transportation,one industry that stands at the nexus of every building type and the transportation modes used to access them is *** is a key consideration that links land use and transportation:Parking is often the connection between where we are and where we want to *** may not have been at the forefront of the sustainability discussion or the media surrounding it in previous years,but the professionals who work in the world of parking know exactly how important the role of their industry is to the success of our cities,towns,institutions,and *** is big business;it is conservatively estimated to be a$30 billion *** directly contributes to the economic vitality and accessibility of where we

关键词： Sustainability triple bottom line rating system parking garages transportation TDM

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

On the effects of spatial resolution on effective distance measurement in digital landscapes

引用

Ecological Processes 2021年第1期10卷 659-677页

作者： rachel Mundeli Murekatete Takeshi Shirabe KTH Royal Institute of Technology School of Architecture and the Built EnvironmentTeknikringen 10A11428 StockholmSweden University of Rwanda College of Science and TechnologyCentre for Geographic Information Systems and Remote SensingKN 67 Street NyarugengeKigaliRwanda

Background:Connectivity is an important landscape attribute in ecological studies and conservation practices and is often expressed in terms of effective *** the cost of movement of an organism over a landscape is effectively represented by a raster surface,effective distances can be equated with the cost-weighted distance of least-cost *** is generally recognized that this measure is sensitive to the grid’s cell size,but little is known if it is always sensitive in the same way and to the same degree and if not,what makes it more(or less)*** conducted computational experiments with both synthetic and real landscape data,in which we generated and analyzed large samples of effective distances measured on cost surfaces of varying cell sizes derived from those *** particular focus was on the statistical behavior of the ratio—referred to as‘accuracy indicator’—of the effective distance measured on a lower-resolution cost surface to that measured on a higher-resolution cost ***:In the experiment with synthetic cost surfaces,the sample values of the accuracy indicator were generally clustered around 1,but slightly greater with the absence of linear sequences(or barriers)of high-cost or inadmissible cells and smaller with the presence of such *** latter tendency was more dominant,and both tendencies became more pronounced as the difference between the spatial resolutions of the associated cost surfaces *** two real satellite images(of different resolutions with fairly large discrepancies)were used as the basis of cost estimation,the variation of the accuracy indicator was found to be substantially large in the vicinity(1500 m)of the source but decreases quickly with an increase in distance from ***:Effective distances measured on lower-resolution cost surfaces are generally highly correlated with—and useful predictors of—effective distances measured on higher-resolution cost *** relationship t

关键词： Landscape connectivity Effective distance Raster-based least-cost path model Accuracy Spatial resolution

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

Solving Quasiconcave Bilevel Programming Problem

引用

American Journal of Operations Research 2017年第2期7卷 121-132页

作者： Dahande Balme Laure Pauline fotso Department of Mathematics Faculty of Science University of Yaounde I Yaounde Cameroon Department of Computer Sciences Faculty of Science University of Yaounde I Yaounde Cameroon

In this paper, we find the solution of a quasiconcave bilevel programming problem (QCBPP). After formulating a Bilevel Multiobjective Programming Problem (BMPP), we characterize its leader objective function and its feasible set. We show some necessary and sufficient conditions to establish a convex union of set of efficient point, an efficient set at the QCBPP. Based on this result, we formulate and solve a new QCBPP. Finally, we illustrate our approach with a numerical example.

关键词： Bilevel Multiobjective Programming Problem Quasiconcave Bilevel Programming Problem Efficient Set

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 key piece of the airway remodeling puzzle revealed-LIGHT signaling in the lung

引用

Genes & Diseases 2023年第4期10卷 1131-1132页

作者： Ziyan rachel Chen Jim Hu Programmes in Translational Medicine Research InstituteHospital for Sick ChildrenTorontoOntario M5G 0A4Canada Department of Laboratory Medicine and Pathobiology University of TorontoTorontoOntario M5S 1A8Canada Department of Paediatrics University of TorontoTorontoOntario M5S 1A8Canada

Asthma is a chronic lung disease that primarily affects the lower respiratory tract in more than 300 million people *** is often triggered by exposure to certain substances or conditions,such as allergens or cold *** overreaction to the allergens causes inflammation and narrowing of the airway,which leads to episodic or persistent symptoms including shortness of breath,nocturnal cough,chest tightness,and wheezing.

关键词： airway lung inflammation

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

Von Hippel-Lindau tumor suppressor pathways&corresponding therapeutics in kidney cancer

引用

Journal of Genetics and Genomics 2021年第7期48卷 552-559页

作者： Maxwell Shulman rachel Shi Qing Zhang Department of Pathology University of Texas Southwestern Medical CenterDallasTXUSA

The identification and application of the Von Hippel-Lindau(VHL)gene is a seminal breakthrough in kidney cancer *** and its protein p VHL are the root cause of most kidney cancers,and the cascading pathway below them is crucial for understanding hypoxia,in addition to the aforementioned tumorigenesis routes and *** reviewed the history and functions of VHL/pVHL and Hypoxia-inducible factor(HIF),their well-known activities under low-oxygen environments as an E3 ubiquitin ligase and as a transcription factor,respectively,as well as their non-canonical functions revealed ***,we discussed how their dysregulation promotes tumorigenesis:beginning with chromosome 3 p-arm(3p)loss/epigenetic methylation,followed by two-allele knockout,before the loss of complimentary tumor suppressor genes leads cells down predictable oncological *** different pathways can ultimately determine the grade,outcome,and severity of the deadliest genitourinary *** finished by investigating current and proposed schemes to therapeutically treat clear cell renal cell carcinoma(cc RCC)by manipulating the hypoxic pathway utilizing Vascular Endothelial Growth Factor(VEGF)inhibitors,mammalian target of rapamycin complex 1(mTORC1)inhibitors,small molecule HIF inhibitors,immune checkpoint blockade therapy,and synthetic lethality.

关键词： VHL HIF ccRCC Kidney cancer Hypoxia

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

The role of copper in enhancing the performance of heteronuclear diatomic catalysts for the electrochemical CO_(2)conversion to C_(1) chemicals

引用

Journal of Energy Chemistry 2023年第10期85卷 490-500,I0013页

作者： Qi Zhao rachel Crespo-Otero Devis Di Tommaso Department of Chemistry School of Physical and Chemical SciencesQueen Mary University of LondonLondon E14NSUK Department of Chemistry University College LondonLondon WC1H 0AJUK

Diatomic catalysts(DACs)with two adjacent metal atoms supported on graphene can offer diverse functionalities,overcoming the inherent limitations of single atom catalysts(SACs).In this study,density functional theory calculations were conducted to investigate the reactivity of the carbon dioxide(CO_(2))reduction reaction(CO_(2)RR)on metal sites of both DACs and SACs,as well as their synergistic effects on activity and *** of the Gibbs free energies of CO_(2)RR and associated values of the limiting potentials to generate C_(1) products showed that Cu acts as a promoter rather than an active catalytic centre in the catalytic CO_(2)conversion on heteronuclear DACs(CuN_(4)-MN_(4)),improving the catalytic activity on the other metal compared to the related SAC MN_(4).Cu enhances the initial reduction of CO_(2)by promoting orbital hybridization between the key intermediate*COOH 2p-orbitals and the metals 3d-orbitals around the Fermi *** degree of hybridization in the DACs CuN_(4)-MN_(4) decreases from Fe to Co,Ni,and *** work demonstrates how Cu regulates the CO_(2)RR performance of heteronuclear DACs,offering an effective approach to designing practical,stable,and high-performing diatomic catalysts for CO_(2)electroreduction.

关键词： Electrocatalytic CO_(2)reduction Single atom catalysts Diatomic catalysts Graphene Density functional theory calculations

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

Suprathreshold compound action potential amplitude as a measure of auditory function in cochlear implant users

引用

Journal of Otology 2017年第1期12卷 18-28页

作者： rachel A.Scheperle Department of Communication Sciences and Disorders University of Iowa Department of Communication Sciences and Disorders Montclair State University

Electrically evoked compound action potential(e CAP) amplitudes elicited at suprathreshold levels were assessed as a measure of the effectiveness of cochlear implant(CI) stimulation. Twenty-one individuals participated; one was excluded due to facial stimulation during e CAP testing. For each participant, e CAPs were elicited with stimulation from seven electrodes near the upper limit of the individual's electrical dynamic range. A reduced-channel CI program was created using those same seven electrodes, and participants performed a vowel discrimination task. Consistent with previous reports, e CAP amplitudes varied across tested electrodes; the profiles were unique to each individual. In 6subjects(30%), e CAP amplitude variability was partially explained by the impedance of the recording electrode. The remaining amplitude variability within subjects, and the variability observed across subjects could not be explained by recording electrode impedance. This implies that other underlying factors, such as variations in neural status across the array, are responsible. Across-site mean e CAP amplitude was significantly correlated with vowel discrimination scores(r^2= 0.56). A single e CAP amplitude measured from the middle of the array was also significantly correlated with vowel discrimination, but the correlation was weaker(r^2= 0.37), though not statistically different from the acrosssite mean. Normalizing each e CAP amplitude by its associated recording electrode impedance did not improve the correlation with vowel discrimination(r^2= 0.52). Further work is needed to assess whether combining e CAP amplitude with other measures of the electrode-neural interface and/or with more central measures of auditory function provides a more complete picture of auditory function in CI recipients.

关键词： Cochlear implant Compound action potential Suprathreshold amplitude

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

The Practice of Accounting in Cameroonians Very Small Enterprises(VSEs)

引用

Journal of Modern Accounting and Auditing 2021年第2期17卷 60-73页

作者： Robert Sangue fotso Roland Hermann Bionomo Department of Management Sciences University of Yaounde ⅡYaoundeCameroon

While accounting practices(APs)are inherent to all businesses,factors to identify them are not always unanimous in the *** paper aims to analyze the contingency factors and accounting practices factors(APFs),to see if and how very small enterprises(VSEs)produce and use accounting *** research focuses on 10 semi-structured interviews with VSEs promoters or managers in Yaounde and *** analysis is used to identify theirs accounting *** is,how and if accounting figures are produced and *** small enterprises(VSEs)use accounting *** majority is involved on forecasting and analyses or cost ***,cost calculation(management accounting)is used but,some are also applying daily registration of transactions(general accounting)and the assessment of financial situation(financial analysis).The principal implication here is in regard with accounting standards for *** must be based on *** that is not the case in our *** least,75%of companies in Cameroun are *** means that they should be taken into account for accounting rules *** emerges that the accounting practices of very small enterprises depend on the retention capacity of the manager,its profile,and the nature of the *** emergence of these variables can permit to apprehend the Information Accounting System of VSEs.

关键词： accounting practices contingency factors content analysis very small enterprises

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：