bluuebunny/crossref_metadata_2025_split huggingface dataset:
Expliquer la croissance des dépenses de santé : le rôle du niveau de vie et du progrès technique
Authors: L'Horty Yannick , Quinet Alain , Rupprecht Frédéric 
Published: September 2011

Expliquer la croissance des dépenses de santé : le rôle du niveau de vie et du progrès technique par Yannick L'Horty, Alain Quinet et Frédéric Rupprecht
Afin d'expliquer la progression des dépenses de santé en France sur longue période, on procède en premier lieu à un survol des études empiriques existantes en traitant plus particulièrement deux questions : la santé est-elle un bien supérieur ? Dans quelle mesure des facteurs d'offre et en particulier le progrès technique médical, contribuent-il à l'accroissement des dépenses de soins ? Dans un deuxième temps, on estime une fonction de dépenses de santé sur séries temporelles en France entre 1970 et 1995. Les dépenses de santé apparaissent très sensibles à l'évolution du niveau de vie, mesuré par le PIB par tête qui expliquerait près des deux cinquièmes de leur progression. L'élasticité prix des dépenses de santé en France s'avère également assez élevée même lorsque l'on prend en compte la prise en charge de ces dépenses par le système de protection sociale. Le progrès technique médical exerce également une influence significative. Les conditions démographiques et le vieillissement de la population n'auraient eu qu'une influence marginale.
Productivités et externalités des dépenses publiques
Authors: Herrera Rémy 
Published: September 2011

Productivités et externalités des dépenses publiques : une étude économétrique sur séries temporelles pour l'Inde et le Pakistan
par Rémy Herrera
Cet article propose une estimation économétrique sur séries temporelles des contributions productives et des effets de productivités factorielles relatives et d' externalités des secteurs publics d'infrastructures, d'éducation santé et de consommation. Cette estimation est effectuée dans le cadre d'un modèle d'offre augmenté de type Feder Ram, à partir de données budgétaires pour l'Inde (1960-1993) et le Pakistan (1972-1993), entièrement reconstituées. Les résultats font apparaître : une contribution à la croissance et un différentiel de productivité (par rapport au secteur privé) positifs du capital public dans les deux pays ; des effets positifs de productivité et sous certaines spécifications d'externalité du capital humain en Inde seulement ; aucun impact de la consommation publique sur la croissance en longue période.
La décroissance des prix au cours d'enchères séquentielles : sources et mesures
Authors: Chanel Olivier , Vincent Stéphanie 
Published: September 2011

La décroissance des prix au cours d'enchères séquentielles : sources et mesure par Olivier Chanel et Stéphanie Vincent
La tendance des prix au cours d'enchères séquentielles constitue un enjeu d'importance pour l'ensemble des acteurs (acheteurs, vendeurs et commissaires-priseurs) : lorsqu'elle s'avère ne plus suivre une marche aléatoire, elle révèle des opportunités non saisies et constitue alors "une anomalie".
Nous envisageons dans un premier temps les réponses apportées par la théorie des enchères pour expliquer la décroissance mise en évidence dans certaines études empiriques. Ces justifications concernent les hypothèses sur les préférences et les contraintes des acheteurs, mais aussi sur les règles institutionnelles et l'organisation même de l'enchère. Nous examinons ensuite différentes techniques mesurant la tendance des prix dans les enchères séquentielles. Enfin, nous vérifions sur des échantillons simulés et des données d'enchères de vins leur capacité à agréger correctement des variations individuelles de prix. L'utilisation de techniques de rééchantillonnage permet l'étude des propriétés statistiques et la construction de tests.
Sensibilités des taux de change d'équilibre aux output gaps et aux cibles de la balance courante
Authors: Borowski Didier , Couharde Cécile , Thibault Florence 
Published: September 2011

Sensibilités des taux de change d'équilibre aux output gaps et aux cibles de balance courante. Méthodologie et
estimation pour les grands pays industrialisés
Didier Borowski, Cécile Couharde et Florence Thibault
À la suite des travaux initiés par le Fonds monétaire international dans les années soixante-dix, John Williamson définit le concept de taux de change d'équilibre fondamental comme le taux de change effectif réel assurant à moyen terme qu'une économie réalise simultanément son équilibre interne (correspondant au sentier de croissance non accélérateur d'inflation) et son équilibre externe (le solde de la balance courante est dit "soutenable").
L'objet de cet article est d'évaluer les taux de change d'équilibre fondamentaux des principaux pays industrialisés (G7, Espagne, Belgique et Pays-Bas) sur la période 1984-1995. Pour procéder à ces estimations, nous développons une maquette statique qui repose sur les spécifications de long terme du modèle multinational Nigem (National Institute 's Global Econometric Model). Notre démarche s'inspire en partie des travaux menés au sein du NIESR (Nationale Institute of Economie and Social Research) mais s'en éloigne dans la mesure où l'équilibre interne est ici supposé exogène.
Les cibles de balances courantes et les rythmes de croissance potentielle - définissant respectivement les équilibres externe et interne - sont au cœur de la détermination des taux de change d'équilibre fondamentaux. Dans la mesure où ils présentent un contenu normatif important, les valeurs retenues pour chacun de ces éléments sont avant tout proposées à titre d'illustration.
Notre méthode de résolution de la maquette de long terme présente plusieurs avantages. D'une part nous obtenons directement des parités bilatérales d'équilibre à partir desquelles sont calculés les taux de change effectifs réels. D'autre part, nous mettons en évidence la sensibilité des taux de change aux écarts aux cibles de balances courantes et aux output gaps. Cette démarche autorise de ce fait un diagnostic plus précis concernant la surévaluation ou la sous-évaluation des monnaies.
Structures productives de l'industrie du transport urbain et effets des schémas réglementaires
Authors: Gagnepain Philippe 
Published: September 2011

Productive Structures in Urban Transport and Effects of Regulatory Arrangements
by Philippe Gagnepain
French urban transport is a highly regulated industry. Different contractual systems create contrasting cost-cutting incentives. The purpose of this paper is to study the industry's productive structures and evaluate the impact of regulations on costs. We use the maximum likelihood method to fit a translog cost function to panel data on the different urban transport networks.
Estimation d'une fonction de prix hédonistiques pour le vin de Champagne
Authors: Gergaud Olivier 
Published: September 2011

Estimation of a Hedonic Price Function for Wine from the Champagne Region
by Olivier Gergaud
This paper applies the hedonic price method to wine from Champagne. The data used are taken from experimental studies published in two French consumer magazines (50 millions de consommateurs and Que Choisir). Some 286 champagnes are described and evaluated. To analyse the link between champagne prices, quality and reputation, we estimate a hedonic price function (the first concerning a sparkling wine we know) followed by a jury grade equation and lastly a value-for-money equation.
Estimation des inefficiences techniques et allocatives des banques de dépôts tunisiennes : une frontière de coût fictif
Authors: Chaffai Mohamed 
Published: September 2011

Estimation des inefficiences techniques et allocatives des banques de dépôts tunisiennes :
une frontière de coût fictif
par Mohamed E. Chaffai
Cet article présente une extension de la modélisation de la fonction de coût par la méthode des prix fictifs pour estimer les inefficacités techniques et allocatives. Sur un panel de banques tunisiennes, on mesure les inefficiences au niveau de chaque banque et de leur évolution dans le temps sans imposer de contraintes sur la technologie utilisée ni d'hypothèses particulières sur les distributions de probabilité des inefficiences. Les résultats montrent que l' inefficience allocative est croissante sur la période 1980-1995, alors que l'inefficience technique s'est légèrement améliorée à la fin de la période.
L'offre de travail des femmes des exploitants agricoles "indépendants" : application sur données françaises
Authors: Benjamin Catherine , Guyomard Hervé , Sollogoub Michel 
Published: September 2011

L'offre de travail des femmes des exploitants agricoles "indépendants" : application sur données françaises
par Catherine Benjamin, Hervé Guyomard et Michel Sollogoub
Les femmes des exploitants agricoles effectuent, en matière d'allocation de leur temps de travail, un arbitrage entre travailler sur l'exploitation et/ou travailler hors de l'exploitation. Une spécificité dans leur comportement d'offre de travail apparaît dans le fait que la rémunération marginale de l'activité agricole est une variable non observée définie par les activités de production du ménage agricole. Le modèle du ménage agricole producteur et consommateur permet de définir les critères de participation de la femme à une activité professionnelle. L'étude empirique basée sur un échantillon de ménages agricoles français montre que les variables exogènes (formation, caractéristiques de l'exploitation,..) ont, en général, des effets opposés sur les probabilités de travailler sur l'exploitation et hors de l'exploitation.
Cellular Imaging Using Equivalent Cross-Relaxation Rate Technique in Rabbit VX-2 Tumor Model
Authors: Nishiofuku Hideyuki , Matsushima Shigeru , Taguchi Osamu , Inaba Yoshitaka , Yamaura Hidekazu , Sato Yozo , Tanaka Toshihiro , Kichikawa Kimihiko 
Published: September 2011

Purpose Equivalent cross-relaxation rate (ECR) imaging (ECRI) is a measurement technique that can be used to quantitatively evaluate changes in structural organization and cellular density by MRI. The aim of this study was to evaluate the correlation between the ECR value and cellular density in the rabbit VX2 tumor model. Materials and Methods Five rabbits implanted with 10 VX2 tumors in the femur muscles were included in this study. We adopted the off-resonance technique with a single saturation transfer pulse frequency of 7 ppm downfield from water resonance. The ECR value was defined as the percentage of signal loss between the unsaturated and saturated images. ECR images were constructed based on the percentage of the ECR value. Pathological specimens were divided into 34 areas and classified into two groups: the viable group and the necrotic group. ECR values were measured and compared between groups. The correlation between the ECR value and cellular density was then determined. Results The mean ECR value was significantly higher in the viable group than in the necrotic group (61.2% vs. 35.8%). The area under the curve that calculated by receiver operating characteristic curve was 0.991 at 7 ppm. The regression graph showed a linear relationship between the ECR value and cellular density; the correlation coefficient (r) was 0.858. Conclusion There is a strong association between the ECR value and cellular density in VX2 tumors and so ECRI could be a potentially useful technique for accurately depicting viable and necrotic areas.
Multicenter Breast Cancer Collaborative Registry
Authors: Sherman Simon , Shats Oleg , Fleissner Elizabeth , Bascom George , Yiee Kevin , Copur Mehmet , Crow Kate , Rooney James , Mateen Zubeena , Ketcham Marsha A. , Feng Jianmin , Sherman Alexander , Gleason Michael , Kinarsky Leo , Silva-Lopez Edibaldo , Edney James , Reed Elizabeth , Berger Ann , Cowan Kenneth 
Published: September 2011

The Breast Cancer Collaborative Registry (BCCR) is a multicenter web-based system that efficiently collects and manages a variety of data on breast cancer (BC) patients and BC survivors. This registry is designed as a multi-tier web application that utilizes Java Servlet/JSP technology and has an Oracle 11g database as a back-end. The BCCR questionnaire has accommodated standards accepted in breast cancer research and healthcare. By harmonizing the controlled vocabulary with the NCI Thesaurus (NCIt) or Systematized Nomenclature of Medicine-Clinical Terms (SNOMED-CT), the BCCR provides a standardized approach to data collection and reporting. The BCCR has been recently certified by the National Cancer Institute's Center for Biomedical Informatics and Information Technology (NCI CBIIT) as a cancer Biomedical Informatics Grid (caBIG®) Bronze Compatible product. The BCCR is aimed at facilitating rapid and uniform collection of critical information and biological samples to be used in developing diagnostic, prevention, treatment, and survivorship strategies against breast cancer. Currently, seven cancer institutions are participating in the BCCR that contains data on almost 900 subjects (BC patients and survivors, as well as individuals at high risk of getting BC).
Increased Self-Efficacy for Vegetable Preparation following an Online, Skill-Based Intervention and In-Class Tasting Experience as a Part of a General Education College Nutrition Course
Authors: Brown Katie N. , Wengreen Heidi J. , Vitale Tamara S. , Anderson Janet B. 
Published: September 2011

Purpose. Assess the effectiveness of the integration of vegetable demonstration videos and tasting experiences into a college nutrition course to influence students' readiness to change vegetable intake, self-efficacy for vegetable preparation, and usual vegetable intake. Design. Quasiexperimental, preintervention-postintervention comparisons. Setting. College nutrition course. Subjects. Of the 376 students enrolled in the course, 186 completed the online assessments (145 female, 41 male; mean age, 20 years). Intervention. Participants viewed online vegetable preparation videos and participated in vegetable tasting experiences that featured four target vegetables, one vegetable each month for 4 months. Measures. Preintervention and postintervention online surveys determined usual vegetable intake, readiness to change vegetable consumption, and self-efficacy of vegetable preparation. Analysis. Chi-square distribution and paired sample t-tests were used to examine differences preintervention and postintervention. Results. Stage of readiness to change vegetable intake shifted from contemplation toward preparation (p < .001). Self-efficacy of vegetable preparation increased and postintervention self-efficacy was associated with total and target vegetable consumption (p = .001 and p = .005, respectively). The average intake of asparagus, one of four target vegetables, increased (p = .016); similar changes were not observed for target or total vegetable consumption. Conclusion. Online vegetable demonstration videos may be an effective and cost-efficient intervention for increasing self-efficacy of vegetable preparation and readiness to increase vegetable consumption among college students. More research is needed to determine long-term effects on vegetable consumption.
Intervention Mapping as a Framework for Developing an Intervention at the Worksite for Older Construction Workers
Authors: Hengel Karen M. Oude , Joling Catelijne I. , Proper Karin I. , van der Molen Henk F. , Bongers Paulien M. 
Published: September 2011

Purpose. The purpose of this study was to apply the Intervention Mapping approach as a framework in the development of a worksite intervention to improve the work ability of construction workers. Design. Development of an intervention by using the Intervention Mapping approach. Setting. Construction worksite. Participants. Construction workers aged 45 years and older. Measures and Analysis. According to the principles of Intervention Mapping, evidence from the literature was combined with data collected from stakeholders (e.g., construction workers, managers, providers). Results. The Intervention Mapping approach resulted in an intervention with the following components: (1) two individual visits of a physical therapist to lower the physical workload, (2) a Rest-Break tool to improve the balance between work and recovery, and (3) two empowerment training sessions to increase the range of influence at the worksite. Conclusions. Application of Intervention Mapping in the development of a worksite prevention program was useful in the construction industry to obtain a positive attitude and commitment. Stakeholders could give input regarding the program components as well as provide specific leads for the practical intervention strategy. Moreover, it also gives insight in the current theoretical and empirical knowledge in the field of improving the work ability of older workers in the construction industry.
Tai chi exercise for treatment of pain and disability in people with persistent low back pain: A randomized controlled trial
Authors: Hall Amanda M. , Maher Chris G. , Lam Paul , Ferreira Manuela , Latimer Jane 
Published: September 2011

AbstractObjectiveTo determine the effect of tai chi exercise on persistent low back pain.MethodsWe performed a randomized controlled trial in a general community setting in Sydney, New South Wales, Australia. Participants consisted of 160 volunteers between ages 18 and 70 years with persistent nonspecific low back pain. The tai chi group (n = 80) consisted of 18 40‐minute sessions over a 10‐week period delivered in a group format by a qualified instructor. The waitlist control group continued with their usual health care. Bothersomeness of back symptoms was the primary outcome. Secondary outcomes included pain intensity and pain‐related disability. Data were collected at pre‐ and postintervention and analyzed by intent‐to‐treat.ResultsTai chi exercise reduced bothersomeness of back symptoms by 1.7 points on a 0–10 scale, reduced pain intensity by 1.3 points on a 0–10 scale, and improved self‐report disability by 2.6 points on the 0–24 Roland‐Morris Disability Questionnaire scale. The followup rate was >90% for all outcomes. These results were considered a worthwhile treatment effect by researchers and participants.ConclusionThis is the first pragmatic randomized controlled trial of tai chi exercise for people with low back pain. It showed that a 10‐week tai chi program improved pain and disability outcomes and can be considered a safe and effective intervention for those experiencing long‐term low back pain symptoms.
Copper‐Catalyzed Coupling of Arylboronic Acids with Potassium Cyanate: A New Approach to the Synthesis of Aryl Carbamates
Authors: Kianmehr Ebrahim , Baghersad Mohammad Hadi 
Published: September 2011

AbstractThe copper‐catalyzed coupling of aromatic boronic acids with potassium cyanate in the presence of an alcohol has been employed for the synthesis of arylcarbamates. This simple and highly efficient approach can be carried out in air at room temperature and, importantly, no base, ligand, or additive is required.
Multi‐Enzymatic Cascade Reactions: Overview and Perspectives
Authors: Ricca Emanuele , Brucher Birgit , Schrittwieser Joerg H. 
Published: September 2011

AbstractMulti‐enzymatic cascade reactions, i.e., the combination of several enzymatic transformations in concurrent one‐pot processes, offer considerable advantages: the demand of time, costs and chemicals for product recovery may be reduced, reversible reactions can be driven to completion and the concentration of harmful or unstable compounds can be kept to a minimum. This review summarizes the developments in multi‐enzymatic cascades employed for the asymmetric synthesis of chiral alcohols, amines and amino acids, as well as for CC bond formation. In addition, a general classification of biocatalytic cascade systems is provided and bioprocess engineering aspects associated with the topic are discussed.
A High‐Throughput Screening Assay for Amino Acid Decarboxylase Activity
Authors: Médici Rosario , de María Pablo Domínguez , Otten Linda G. , Straathof Adrie J. J. 
Published: September 2011

AbstractThe development of sensitive and easy‐to‐apply high‐throughput screening methods is a common need in modern biocatalysis. With these powerful analytical tools in hands, chemists can easily assess enzyme libraries to identify either novel biocatalysts or improved mutants. Within biocatalysis, amino acid decarboxylases are gaining an increased importance, with several diverse applications ranging from the synthesis of bio‐commodities to medical applications (e.g., synthesis of enzyme inhibitors at the level of L‐DOPA decarboxylase). Herein, an efficient and simple analytical method for high‐throughput screening of amino acid decarboxylase activity is reported. The method is valid for the discrimination of a broad range of amino acid/amine pairs such as L‐tyrosine/tyramine, L‐DOPA/dopamine, 5‐hydroxy‐L‐tryptophan/serotonin, L‐histidine/histamine, L‐serine/ethanolamine, L‐tryptophan/tryptamine, L‐glutamic acid/GABA, and L‐alanine/ethylamine. It has proven its versatility by using pure substrates, mixtures, or enzymatic reactions, both coming either from commercial enzymes or derived from cell‐free (crude) extracts. The limit of detection was 13 μM for ethanolamine in the presence of 50 mM L‐serine, while z′ values were in the range 0.75–0.93, indicating the suitability for high‐throughput screening.
Synthesis of water‐soluble and conducting polyaniline by growing of poly (N‐isopropylacrylamide) brushes via atom transfer radical polymerization method
Authors: Ghorbani Marjan , Gheybi Homa , Entezami Ali Akbar 
Published: September 2011

AbstractPolyaniline‐graft‐Poly(N‐isopropylacrylamide) copolymers were synthesized by atom‐transfer radical polymerization (ATRP) of N‐isopropylacrylamide using polyaniline macro‐initiators. Polyaniline‐chloroacetylchloride and polyaniline‐chloropropionylchloride macroinitiators were obtained by the reaction of amine nitrogens of polyaniline with chloroacetyl chloride and 2‐choloropropionyl choloride, respectively. Both macroinitiators and graft copolymers were characterized by FT‐IR and 1H‐NMR spectroscopy. The cyclic voltammetry (CV) and UV‐Vis spectroscopy studies showed that these copolymers are electroactive. The solubility test revealed that the polyaniline‐graft‐poly (N‐isopropylacrylamide) copolymers are water soluble or water/methanol soluble. The Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) images showed the growing of poly (N‐isopropylacrylamide) chains on polyaniline backbone. Investigation of thermal behavior of graft copolymers by thermal gravimetry analysis (TGA) confirmed the results obtained from AFM and SEM images. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Investigation on the effects of fabrication parameters on the structure and properties of surface‐modified membranes using response surface methodology
Authors: Bakeri Gh. , Ismail A. F. , Rana D. , Matsuura T. , Shariaty M. 
Published: September 2011

AbstractSurface Modifying Macromolecules (SMM) were used to alter the hydrophobicity of polyetherimide (PEI) hollow fiber membranes and the effects of three fabrication parameters, which are the mass fraction of PEI and SMM in the casting dope and air gap, on the properties of fabricated membranes were investigated by application of Response Surface Methodology (RSM). The fabricated membranes were characterized in terms of mean pore size (rP,m), permeation rate of helium gas at 1 bar transmembrane pressure difference, membrane porosity, and contact angle of water with inner and outer surfaces of membrane. The regression models obtained for mean pore size and permeation rate have good statistical parameters and are accurate. The model for rP,m predicts that plot of rP,m versus air gap has a minimum point, whereas the plots of rP,m versus PEI (wt %) and SMM (wt %) have maximum points. The regression model developed for membrane porosity predicts that membrane porosity decreases when air gap increases. Since water was used as bore fluid, the model developed for inner surface contact angle has low accuracy but the model developed for outer surface contact angle predicts that contact angle increases with SMM concentration in dope solution but there is a maximum point versus air gap. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012