检索结果-南通市图书馆

Ventriculo-atrial shunt with occlusion of the internal jugular vein: operative experience and surgical technique

中华神经外科杂志(英文) 2024年第2期10卷 1-8页

作者： Quintero Silvia Tatiana Ramirez-Velandia Felipe Moreno Andres Felipe Hortua vera lina Rugeles Paula Gonzalez Rafael Augusto Azuero Pontificia Universidad Javeriana Clinica Medilaser S.A.S. Clinica Chicamocha Bucaramanga Santander Colombia Neurology and Neurosurgery Research Group Pontificia Universidad Javeriana Bogotá D.C. Colombia Universidad Industrial de Santander Clinica Chicamocha Bucaramanga Colombia Universidad Autónoma de Bucaramanga Clinica Chicamocha Bucaramanga Colombia Clinica Chicamocha Bucaramanga Santander Colombia

Background Ventricular shunts are one of the most frequent techniques used for the management of hydrocephalus. The ventriculoperitoneal shunt (VPS) is the most commonly performed procedure, and the ventriculoatrial shunt (VAS) is the second option in most medical centers. The main objective of this study is to introduce and describe a surgical approach for VAS outlining our experience and comparing it with traditional shunting *** In this retrospective cohort comparison study, we included patients with hydrocephalus treated with a surgical procedure between January 2010 and February 2021 at a single academic institution. We categorized the procedures into two groups: patients with VPS and conventional VAS grouped together into the conventional technique (CT) group, and the second group was patients with whom we performed VAS with complete internal jugular vein occlusion (IJVOT). We compared the surgical time, postoperative complications, and occurrence of shunt failure among the groups by performing univariate analysis using the Fisher exact *** Out of the 106 patients included in the analysis, IJVOT was performed in 66 patients, and CT in 40 patients. The median surgical time was 60 min (IQR 60-90) for IJVOT versus 100 min (IQR 60-120) for CT (p < 0.01). In the follow-up a month after the procedure, 83.3% of patients with IJVOT and 62.5% of patients with CT did not require shunt removal or shunt revision (p < 0.01). Shunt revision rates were 12.5% and 1.5% for CT while 1.5% and 2.5% for IJVOT at 1 and 6 months after the *** Our findings demonstrate that VAS with IJVOT is a safe method that exhibited shorter surgical times and outcomes comparable to CT. However, since the present study represents the first cohort evaluating IJVOT, it is imperative to conduct larger prospective studies, along with clinical trials, to fully explore and establish efficacy, long-term outcomes, and an in-depth comparison among shunting techniques

关键词： Hydrocephalus Ventriculoatrial shunting Internal jugular vein Operative time Complications Shunt removal

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Goryachkin＇s agricultural mechanics

引用

Frontiers of Mechanical Engineering 2016年第1期11卷 87-94页

作者： vera CHINENOVA Mathematics and Mechanics Department Lomonosov Moscow StateUniversity Moscow 119992 Russia

The paper contributes to the development of applied mechanics by establishing a new discipline, namely, agricultural mechanics by academician Vasilii Prohorovich Goryachkin （1868-1935） who was an apprentice of Nikolay Yegorovich Zhukovsky and a graduate of the Moscow University （current known as Moscow State University） and the Imperial Higher Technical School.

关键词： theory of mechanisms and machines agricultural machinery engineering agricultural mechanics

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

Folate Metabolism Interferes with Plant Immunity through 1C Methionine Synthase-Directed Genome-wide DNA Methylation Enhancement

引用

Molecular Plant 2019年第9期12卷 1227-1242页

作者： Beatriz Gonzalez Pablo vera Instituto de Biologia Molecular y Celular de Plantas Universidad Politecnica de Valencia-C.S.I.CCiudad Politecnica de la InnovacionEdificio 8EIngeniero Fausto Elios/n.46022 ValenciaSpain

Plants rely on primary metabolism for flexible adaptation to environmental ***,through a combination of chemical genetics and forward genetic studies in Arabidopsis plants,we identified that the essential folate metabolic pathway exerts a salicylic acid-independent negative control on plant *** of the folate pathway promotes enhanced resistance to Pseudom onas syringae DC3000 via activation of a primed immune state in plants,whereas its implementation results in enhanced *** proteomics analysis using immune-defective mutants identified a methionine synthase(METS1),in charge of the synthesis of Met through the folate-dependent 1C metabolism,acting as a nexus between the folate pathway and plant *** of METS1 represses plant immunity and is accompanied by genome-wide global increase in DNA methylation,revealing that imposing a methylation pressure at the genomic level compromises plant *** together,these results indicate that the folate pathway represents a new layer of complexity in the regulation of plant defense responses.

关键词： folate pathway plant immunity methionine DNA methylation

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

Engineering the Smart Factory

引用

Chinese Journal of Mechanical Engineering 2016年第6期29卷 1046-1051页

作者： HARRISON Robert vera Daniel AHMAD Bilal Warwick Manufacturing Group University of Warwick

The fourth industrial revolution promises to create what has been called the smart factory. The vision is that within such modular structured smart factories, cyber-physical systems monitor physical processes, create a virtual copy of the physical world and make decentralised decisions. This paper provides a view of this initiative from an automation systems perspective. In this context it considers how future automation systems might be effectively configured and supported through their lifecycles and how integration, application modelling, visualisation and reuse of such systems might be best achieved. The paper briefly describes limitations in current engineering methods, and new emerging approaches including the cyber physical systems （CPS） engineering tools being developed by the automation systems group （ASG） at Warwick Manufacturing Group, University of Warwick, UK.

关键词： index terms--smart factory Industry 4.0 automation systems cyber-physical systems engineering lifecycle

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

Modes of Exocytotic and Endocytotic Events in Tobacco BY-2 Protoplasts

引用

Molecular Plant 2011年第2期4卷 241-251页

作者： vera Bandmann Marko Kreft Ulrike Homann Institut fur Botanik Technische Universitat Darmstadt 64287 Darmstadt Germany Laboratory of Neuroendocrinology and Molecular Cell Physiology University of Ljubljana and Celica Biomedical Center Technology Park 24 1000 Ljubljana Slovenia

To analyze the kinetics and size of single exo- and endocytotic events in BY-2 protoplasts, we employed cellattached membrane capacitance measurements. These measurements revealed different modes of fusion and fission of single vesicles. In about half of the observed exocytotic events, fusion occurred transiently, which facilitates rapid recycling of vesicles. In addition, transient sequential or multi-vesicular exocytosis observed in some recordings can contribute to an increase in efficiency of secretory product release. Microscopic analysis of the timescale of cellulose and pectin deposition in protoplasts demonstrates that rebuilding of the cell wall starts soon after isolation of protoplasts and that transient fusion events can fully account for secretion of the required soluble material. The capacitance measurements also allowed us to investigate formation of the fusion pore. We speculate that regulation of secretion may involve control of the length and/or size of fusion pore opening. Together, the different kinetic modes of exo- and endocytosis revealed by capacitance measurements underline the complexity of this process in plants and provide a basis for future research into the underlying mechanisms. The fact that similar fusion/fission kinetics are present in plant and animal cells suggests that many of these mechanisms are highly conserved among eukaryotes.

关键词： Electrophysiology cell walls protein traffic and secretion BY-2 endocytosis exocytosis.

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

Sap flow rates of Minquartia guianensis in central Amazonia during the prolonged dry season of 2015–2016

引用

Journal of Forestry Research 2021年第5期32卷 2067-2076页

作者： Saul A.Antezana-vera Ricardo A.Marenco Botany Graduate Program Instituto Nacional de Pesquisas da Amazônia-INPAAvenida AndréAraújo2936ManausAM 69067-375Brazil Tree Ecophysiology LaboratoryInstituto Nacional de Pesquisas da Amazônia-INPAAvenida AndréAraújo2936ManausAM 69067-375Brazil

Minquartia guianensis *** a slow-growing species with several *** the juvenile state,it is well-adapted to low light conditions of the forest ***,it is still unknown how climate variability affects transpiration of this species,particularly under drought *** this study,we aimed to assess the effect of climatic variability on sap flow rates(SFR).SFR and radial growth were measured in six trees(14-50 cm diameter)in 2015 and ***(precipitation,irradiance,relative humidity and temperature)and soil water content(SWC)data were also *** tended to increase in the dry season,with a negative relationship between SFR and SWC and precipitation(p<0.001),while there was a positive association between radial growth and monthly precipitation(p=0.004).Irradiance and temperature were the environmental factors more closely correlated with SFR during daytime(p<0.001),whereas relative humidity and vapor pressure deficit were the most important factors at night(p<0.001).Although negative SFR were sometimes recorded at night,the mean nocturnal sap flow was positive and across trees the nighttime sap flow accounted for 12.5%of the total daily sap *** transpiration during the dry season suggests that the root system of Minquartia was able to extract water from deep soil *** results widen our understanding of the ecophysiology of Amazonian trees under drought and provide further insight into the potential effect of the forecasted decline in precipitation in the Amazon region.

关键词： Reverse sap flow Soil water content Transpiration Tree growth

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

Stabilization for a Fourth Order Nonlinear Schrödinger Equation in Domains with Moving Boundaries

引用

Journal of Partial Differential Equations 2021年第3期34卷 268-283页

作者： vera VILLAGRAN Octavio Paulo Mathematics Department University of TarapacaArica-Chile

In the present paper we study the well-posedness using the Galerkin method and the stabilization considering multiplier techniques for a fourth-order nonlinear Schrödinger equation in domains with moving *** consider ... 详细信息

关键词： Nonlinear Schrödinger equation moving boundary stabilization

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 method of residual‑based bootstrap averaging of the forecast ensemble

引用

Financial Innovation 2023年第1期9卷 991-1002页

作者： vera Ivanyuk Department of Data Analysis and Machine Learning Financial University49 Leningradsky ProspektMoscowRussia 125993

This paper presents an optimization approach—residual-based bootstrap averaging(RBBA)—for different types of forecast *** traditional residual-mean-square-error-based ensemble forecast averaging approaches,the RBBA method attempts to find optimal forecast weights in an ensemble and allows for their combi-nation into the most effective additive *** the RBBA method,all the different types of forecasts obtain the optimal weights for ensemble residuals that are statisti-cally optimal in terms of the fitness function of the *** studies have been conducted to demonstrate why and how the RBBA method *** experi-mental results based on the real-world time series of contemporary stock exchanges show that the RBBA method can produce ensemble forecasts with good generalization ability.

关键词： Forecast ensembles Time series Artificial neural networks

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

Same or different?Abstract relational concept use in juvenile bamboo sharks and Malawi cichlids

引用

Current Zoology 2021年第3期67卷 279-292页

作者： Theodora Fuss Leonie John vera Schluessel Institute of Zoology Rheinische Friedrich-Wilhelms-University BonnMeckenheimer Allee 169Bonn53115Germany

Sorting objects and events into categories and concepts is an important cognitive prerequisite that spares an individual the learning of every object or situation encountered in its daily ***,specific items are classified in general groups that allow fast responses to novel *** present study assessed whether bamboo sharks Chiloscyllium griseum and Malawi cichlids Pseudotropheus zebra can distinguish sets of stimuli(each stimulus consisting of two abstract,geometric objects)that meet two conceptual preconditions,i.e.,(1)"sameness"versus"difference"and(2)a certain spatial arrangement of both *** two alternative forced choice experiments,individuals were first trained to choose two different,vertically arranged objects from two different but horizontally arranged *** discriminations were followed by extensive transfer test *** tests using stimuli consisting of(a)black and gray circles and(b)squares with novel geometric patterns provided conflicting information with respect to the learnt rule"choose two different,vertically arranged objects",thereby investigating(1)the individuals'ability to transfer previously gained knowledge to novel stimuli and(2)the abstract relational concept(s)or rule(s)applied to categorize these novel *** results suggest that the level of processing and usage of both abstract concepts differed considerably between bamboo sharks and Malawi *** sharks seemed to combine both concepts-although not with equal but hierarchical prominence-pointing to advanced cognitive ***,Malawi cichlids had difficulties in discriminating between symbols and failed to apply the acquired training knowledge on new sets of geometric and,in particular,gray-level transfer stimuli.

关键词： visual concept learning spatial arrangement relational abstract concept Malawi cichlid bamboo shark

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

IAS/IFRS and financial reporting quality:Lessons from the European experience

引用

China Journal of Accounting Research 2013年第4期6卷 247-263页

作者： vera Palea Department of Economics and Statistics "Cognetti de Martiis" University of Torino

This paper discusses the effects of the adoption of IAS/IFRS in Europe on the quality of financial *** doing so,it adopts the perspective of stock market investors and focuses on value-relevance *** adoption of IAS/IFRS in Europe is an example of accounting standardization among countries with different institutional frameworks and enforcement *** allows investigating whether,and to what extent,accounting regulation per se can affect the quality of financial reporting and leads to convergence in financial *** is a key issue for standard setting purposes as IAS/IFRS have been adopted in very diverse countries all over the world,and many others are likely to adopt them in the near future.

关键词： Financial reporting quality IAS/IFRS Value-relevance European Regulation 1606/2002

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：