检索结果-南通市图书馆

Returns to Lying？ Identifying the Effects of MisreporUng When the Truth Is Unobserved

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Economics in China-Selected Publications from Chinese Universities 2012年第2期7卷 163-192页

作者： Yingyao Hu arthur Lewbel Department of Economics Johns Hopkins University Baltimore MD 21218 USA Department of Economics Boston College Boston MA 02467 USA

Consider an observed binary regressor D and an unobserved binary vari- able D＊, both of which affect some other variable Y. This paper considers nonpara- metric identification and estimation of the effect of D on Y, conditioning on D＊ = 0. For example, suppose Y is a person＇s wage, the unobserved D＊ indicates if the person has been to college, and the observed D indicates whether the individual claims to have been to college. This paper then identifies and estimates the difference in av- erage wages between those who falsely claim college experience versus those who tell the truth about not having college. We estimate this average effect of lying to be about 6% to 20%. Nonparametric identification without observing D＊ is obtained ei- ther by observing a variable V that is roughly analogous to an instrument for ordinary measurement error, or by imposing restrictions on model error moments.

关键词： binary regressor misclassification measurement error unobserved factor discrete factor program evaluation treatment effects returns to schooling wage model

Diagnosis and Management of Alcoholic Liver Disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2015年第2期3卷 109-116页

作者： Mohannad Dugum arthur McCullough Department of Internal Medicine Medicine Institute Cleveland Clinic Cleveland Ohio USA Department of Gastroenterology and Hepatology Digestive Disease Institute Cleveland Clinic Cleveland Ohio USA

Alcohol is a leading cause of liver disease and is associated with significant morbidity and *** factors,including the amount and duration of alcohol consumption,affect the development and progression of alcoholic liver disease (ALD).ALD represents a spectrum of liver pathology ranging from fatty change to fibrosis to *** diagnosis of ALD is important to encourage alcohol abstinence,minimize the progression of liver fibrosis,and manage cirrhosis-related complications including hepatocellular carcinoma.A number of questionnaires and laboratory tests are available to screen for alcohol *** biopsy remains the gold-standard diagnostic tool for ALD,but noninvasive accurate alternatives,including a number of biochemical tests as well as liver stiffness measurement,are increasingly being utilized in the evaluation of patients with suspected *** management of ALD depends largely on complete abstinence from *** care should focus on treating alcohol withdrawal and providing enteral nutrition while managing the complications of liver *** hepatitis (AH) is a devastating acute form of ALD that requires early recognition and specialized tertiary medical *** of AH severity using defined scoring systems is important to allocate resources and initiate appropriate *** or pentoxifylline are commonly used in treating AH but provide a limited survival *** transplantation represents the ultimate therapy for patients with alcoholic cirrhosis,with most transplant centers mandating a 6 month period of abstinence from alcohol before *** liver transplantation is also emerging as a therapeutic measure in specifically selected patients with severe AH.A number of novel targeted therapies for ALD are currently being evaluated in clinical trials.

关键词： Alcoholism Alcoholic cirrhosis Alcoholic hepatitis Liver transplantation

Nonlinear resonances phenomena in a modified Josephson junction model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第12期29卷 162-173页

作者： Pernel Nguenang Sandrine Takam Mabekou Patrick Louodop arthur Tsamouo Tsokeng Martin Tchoffo Research Unit Condensed Matter Electronics and Signal ProcessingThe University of DschangP.O.Box 67 DschangCameroon Unitède Recherche de Mècanique et de Modèlisation des Systemes Physiques(UR-2MSP) Facultèdes SciencesUniversitède DschangBP 69 DschangCameroun Sao Paulo State University(UNESP) Instituto de Fìsica TeóricaRua Dr.BentoTeobaldo Ferraz 271Bloco IIBarra Funda01140-070 Sao PauloBrazil

In this paper,the equivalent circuit of the non-autonomous Josephson junction(JJ)is presented and the effect of the proper frequency on the phaseφis *** also study nonlinear resonance phenomena in the oscillations of a modified Josephson junction(MJJ).These oscillations are probed through a system of nonlinear differential equations and the multiple time scale method is employed to investigate all different types of resonance that *** results of primary,superharmonic and subharmonic resonances are obtained *** show that the system exhibits hardening and softening behaviors,as well as hysteresis and amplitude hopping phenomena in primary and superharmonic resonances,and only the hysteresis phenomenon in subharmonic *** addition,the stabilities and the steady state solutions in each type of resonances are kindly *** number of equilibrium points that evolve with time and their stabilities are also ***,the equations of motion are numerically integrated to check the correctness of analytical *** further show that the dynamics of the MJJ is strongly influenced by its parameters.

关键词： nonlinear resonances hysteresis and jump phenomena modified Josephson junction

Can we have a general theory of financial innovation processes? A conceptual review

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

Financial Innovation 2018年第1期4卷 62-88页

作者： Tamer Khraisha Keren arthur Center for Network Science Central European UniversityNádor u.9Budapest H-1051Hungary University of Cape Coast Cape CoastGhana.

Introduction:Since the financial crisis of 2008,the theory of financial innovation has been a focus at a time of re-evaluation and ***,little has been done to evaluate the current state of research considering the increasing complexity of financial *** paper examines the hypothesis of a general theory that encompasses increasing complexities in the financial innovation ***:The paper begins with an overview of the definitions,the features,and the classification schemes of financial ***,the paper reviews the existing literature on the main objects of study in financial innovation and groups the findings under four main concepts.A conceptual analysis is presented that evaluates current approaches to the study of the financial innovation process and the difficulties inherent in constructing a single general *** paper proposes a framework based on a meta-theory of financial innovation as a better approach to understanding the inherent complexities and diversities affecting financial ***:(1)Financial innovations present diversities and complexities that make it infeasible to build a unifying general theory to explain their development.(2)The current state of research on financial innovation theories is limited and requires additional input.(3)A meta-theory that identifies,classifies,and connects theories of development for financial innovations is better suited to explaining the complexity of financial innovation processes.

关键词： Financial innovation process Complexity Meta-theory General theory

Comment on:“Impact of portable normothermic blood-based machine perfusion on outcomes of liver transplant:the OCS Liver PROTECT randomized clinical trial”

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2022年第2期11卷 267-269页

作者： arthur Marichez Jean-Philippe Adam Department of Hepato-Bilio-Pancreatic Surgery and Liver Transplantation Haut Lévêque HospitalCHU de BordeauxFrance

We read with great interest the paper by Markmann et ***“Impact of portable normothermic blood-based machine perfusion on outcomes of liver transplant:The OCS Liver PROTECT randomized clinical trial”(1).In this multicenter randomized clinical trial,the authors compared posttransplant outcomes for recipients who received donation after brainstem death(DBD)or donation after circulatory death(DCD)livers preserved using ischemic cold storage(ICS)or a portable normothermic machine perfusion(NMP)[Organ Care System(OCS)Liver].The primary endpoint was the incidence of early allograft dysfunction(EAD)as defined by Olthoff et ***(2).The trial was methodologically designed to test both non-inferiority on the primary endpoint,and superiority if non-inferiority was *** study was conducted from 2016 to 2019 at 20 US liver transplant programs.

关键词： Impact portable Liver

The Global Alliance against Chronic Respiratory Diseases:journey so far and way ahead

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2020年第13期133卷 1513-1515页

作者： Arzu Yorgancioglu Nikolai Khaltaev Jean bousquet Cherian Varghese Department of Pulmonology Celal Bayar UniversityManisa 45140Turkey Global Alliance Against Chronic Respiratory Diseases(GARD) Geneva 1224Switzerland Contre les MAIadies Chroniques pour un Vleillissement Actif(MACVIA) University HospitalMontpellier 34090France Department of the Management of Noncommunicable Diseases World Health OrganizationGeneva 1224Switzerland

The Global Alliance Against Chronic Respiratory Diseases(GARD)is a voluntary alliance of national and international organizations,institutions,and agencies committed to the vision of "a world where all people breathe freely"Its goal is to reduce the global burden of chronic respiratory disease(CRD).The GARD initiative was set up to respond to a resolution of the World Health Assembly in May 2000(Resolution WHA53.17)that emphasized the need to increase awareness of the growing epidemic of CRDs worldwide.A program was begun to design a comprehensive approach to the prevention and control of CRDs.11,21 The resolution was approved by the General Assembly of World Health Organization(WHO)in 2004.

关键词： Diseases prevention Alliance

Correcting for non-compliance when determining colonic transit time with radio-opaque markers

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

World Journal of Gastroenterology 2017年第4期23卷 740-742页

作者： Alvin Ibarra Kaisa Olli arthur C Ouwehand DuPont Nutrition and Health 02460 KantvikFinland

The use of radio-opaque markers and abdominal X-ray is the standard method for determining colonic transit time(CTT). However, when there are deviations in the intake of these markers by participants in clinical trials it is desirable to improve observations by introducingcorrections, where possible. To date, there is no standard procedure to adjust for such deviations. This report proposes a series of alternatives based on possible scenarios for deviations from the intended intake of radio-opaque markers. The proposed method to correct for missed or delayed consumption of radioopaque markers can help to increase the accuracy of the CTT measurements in clinical trials.

关键词： Colonic transit time Gastroenterology Gut transit time Radio-opaque marker X-ray

Pseudo-Depth/Intercept-Time Monotonicity Requirements in the Inverse Scattering Algorithm for Predicting Internal Multiple Reflections

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2009年第1期5卷 163-182页

作者： Bogdan G.Nita arthur B.Weglein Department of Mathematical Sciences Montclair State University1 Normal AvenueMontclairNJ 07043USA. Department of Physics University of Houston617 Science and Research Bldg.1HoustonTX 77004USA

In this paper we discuss the inverse scattering algorithm for predicting internal multiple reflections(reverberation artefacts),focusing our attention on the construction *** speaking,the algorithm combines amplitude and phase information of three different arrivals(sub-events)in the data set to predict one multiple *** three events are conditioned by a certain relation which requires that their pseudo-depths,defined as the depths of their turning points relative to the constant background velocity,satisfy a lower-higher-lower *** implicitly assumes a pseudo-depth monotonicity condition,i.e.,the relation between the actual depths and the pseudo-depths of any two sub-events is the *** study this relation in pseudo-depth and show that it is directly connected with a similar relation between the vertical or intercept times of the *** paper also provides the first multidimensional analysis of the algorithm(for a vertically varying acoustic model)with analytical *** show that the construction of internal multiples is performed in the plane waves domain and,as a consequence,the internal multiples with headwaves sub-events are also predicted by the *** we analyze the differences between the time monotonicity condition in vertical or intercept time and total travel time and show a 2D example which satisfies the former but not the *** we discuss one case in which the monotonicity condition is not satisfied by the sub-events of an internal multiple and discuss ways of lowering these restrictions and of expanding the algorithm to address these types of multiples.

关键词： Multiple reflections seismic imaging inverse scattering

Microtextures on quartz grains from the Gulf of Mexico and the Mexican Pacific coastal sediments:Implications for sedimentary processes and depositional environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2022年第2期11卷 256-274页

作者： Jayagopal Madhavaraju John SArmstrong-Altrin Kandasamy Selvaraj Rathinam arthur James Estaci on Regional Del Noroeste Instituto de GeologíaUniversidad Nacional Aut onoma de MexicoHermosilloSonora 83000Mexico Universidad Nacional Aut onoma de Mexico Instituto de Ciencias Del Mary LimnologíaUnidad de Procesos Oce anicosy CosterosCiudad UniversitariaCiudad de Mexico 04510Mexico Department of Geological Oceanography and State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen UniversityXiamenChina Department of Marine Science Bharathidasan UniversityTiruchirapalli620024Tamil NaduIndia

Microtexture analyes on quartz from coastal sediments of the Gulf of Mexico and the Mexican Pacific Coast reveal 35 and 30 types of microtextures,respectively,which were grouped into mechanical,mechanical/chemical and chemical categories based on their mode of *** of chemical origin are rarer in the El Carrizal than in the Manzanillo beach sediments of the Mexican Pacific *** of mechanical origin like straight and curved scratches,pits,broken edges,and V-shaped marks indicate high energy,fluvial to marine depositional *** scarcity to absence of chemical features suggest that the energy level was higher at the Mexican Pacific coast than on the Gulf of Mexico coast.V-shaped marks are common in the Gulf of Mexico sediments,whereas they are abundant in the quartz grains from the Mexican Pacific *** frequency and density of V-shaped marks are produced by exceedingly high wave velocity during storm events or *** of V-shaped marks with fresh surfaces of quartz grains from the Mexican Pacific coast indicate an extremely high-energy impact *** quartz grains from the El Carrizal beach of the Mexican Pacific coast have abundant closely spaced Vshaped marks with fewer fresh *** high frequency of V-shaped marks is mainly linked to grain-tograin collision,typically associated with high-energy sub-aqueous conditions with a large volume of sedimentary particles in the water column that are produced during a tsunami or storm *** contrast,many quartz grains from the Gulf of Mexico have large fresh surfaces with moderate percentages of V-shaped marks that might have been produced by high-energy waves with low sediment concentrations during storm events.

关键词： Microtextures Quartz grains V-shaped marks Tsunami and storm events Sedimentary processes