bluuebunny/crossref_metadata_2025 huggingface dataset:
Observance des conseils de prévention et de soins chez les populations vulnérables : l'expérience des centres d'examens de santé de l'Assurance maladie
Authors: Sass Catherine , Chatain Carine , Rohmer J.-F. , Barbier Y , Bongue B. , de La Celle C. , DePierre M , Etéchami E. , Gutton S , Labbé Émilie , Lazarus S. , Laboulaye P , Le Clésiau H , Léger B. , Lenain J.-L. , Moulin J-J , Nitenberg C. , Pagnon X. , Philippe D. , Pouchard Michel , Soufi K. , Vandernoot M.-P. , Gerbaud Laurent
Published: November 2014

Résumé Objectifs : Les centres d’examens de santé de l’Assurance maladie doivent contribuer à favoriser l’insertion des personnes socialement vulnérables dans le système de soins. Cette enquête avait pour objectif de documenter les suites données à l’examen de santé pour ce public. Méthodes : Des personnes socialement vulnérables ont été suivies sur une période de six mois à un an après la réalisation d’un examen de santé dans un centre d’examen de santé (CES). Les suites données à l’examen de santé ont été documentées soit par le médecin traitant (courrier), soit par la personne elle-même (courrier ou entretien téléphonique). Les motifs de suivi étaient : suspicion d’hypertension ou de diabète, obésité non prise en charge, besoins de soins bucco-dentaires, défaut de vaccination antitétanique ou absence de mammographie de dépistage. Résultats : Dans notre population, 389 sujets socialement vulnérables ont été suivis dans 11 CES. À six mois de suivi, 81,5 % des personnes avaient consulté un médecin, 55,6 % avaient mis à jour leur vaccination antitétanique et 44,6 % avaient réalisé des soins dentaires. Un an après l’examen, 82 % des sujets concernés par un suivi pour hypertension, diabète ou obésité déclaraient avoir entamé une prise en charge en adéquation avec les préconisations de leur médecin. Conclusion : L’étude met en évidence un bénéfice de l’examen de santé pour la plupart des personnes qui ont participé à l’enquête. Il se traduit en termes de dépistage et de prise en charge de pathologies chroniques, de rattrapage vaccinal et de soins dentaires. L’examen de santé s’avère être un dispositif adapté pour participer à la réduction des inégalités de santé dans le cadre du parcours de soins. Prat Organ Soins. 2011;42(2):79-87
Sécurisation du circuit des ancillaires orthopédiques
Authors: Lebon C , Bertrand E. , Diouf I , Cohen Thierry
Published: November 2014

Résumé Les ancillaires sont des instruments chirurgicaux utilisés pour poser une prothèse. Les risques engendrés par leur circulation entre les fournisseurs et les services de l’hôpital sont complexes (problèmes logistiques, difficultés de traçabilité, altération des performances du matériel et risques de transmission d’agents infectieux). L’étude s’intéresse à la sécurisation du circuit des ancillaires orthopédiques, en prêt dans l’hôpital, par la réalisation d’une cartographie des risques. Une analyse préliminaire des risques (APR) a identifié 105 situations dangereuses de vulnérabilité 1 et 58 situations dangereuses de vulnérabilité 2. L’analyse des situations dangereuses de vulnérabilité 1 identifie 121 scénarios avec 54,5 % de scénarios de criticité initiale de niveau 2 et 5 % de scénarios de criticité initiale de niveau 3. L’APR cible la mise en place d’un plan d’action de réduction des risques sous la forme de fiches actions puis d’un catalogue des paramètres de sécurité s’intégrant dans une gouvernance des risques dans l’hôpital. Prat Organ Soins. 2011;42(3):179-86
L'incertitude médicale ressentie par les femmes tout au long de la prise en charge pour un cancer du sein
Authors: Benoit M. , Dragon J , Lavoie A.-M.
Published: November 2014

Résumé Objectif : Le présent article porte sur la manière dont les patientes atteintes d’un cancer du sein reçoivent les informations sur leur pathologie cancéreuse, transmises par les professionnels de la santé. Notre objectif était de préciser la perception, par les patientes atteintes d’un cancer du sein, des informations transmises par les professionnels de santé sur la pathologie cancéreuse pour laquelle elles ont reçu un diagnostic. Méthodes : Nous avons opté pour une approche analytique qui s’apparente à l’analyse du discours pour interroger dix-neuf témoignages écrits de femmes qui racontent leur expérience. Résultats : Cette démarche a permis de définir le concept d’incertitude médicale et d’élucider la notion de confiance à travers trois différents niveaux d’acceptions théoriques que sont la confiance décidée ou assurée (Luhmann N. Réseaux. 2001;108:15) et la confiance raisonnée. L’analyse du témoignage de femmes sur l’incertitude médicale qu’elles éprouvent à l’annonce d’un diagnostic de cancer du sein a montré des changements dans les habitudes de travail des médecins et du personnel soignant autour de « l’annonce du diagnostic ». Conclusion : Trois propositions, selon nous, apparaîtraient dès lors importantes : 1) intégrer la malade dans une relation active avec le personnel soignant ; 2) réfléchir à des modèles de soins tenant compte des difficultés énoncées dans l’annonce du diagnostic ; et, 3) considérer le fait que la personne soit, en tout temps, au centre d’une pratique humaine des soins en oncologie. Nous plaidons pour un changement d’attitude des médecins, en fonction de la confiance à établir entre le médecin et la patiente. Prat Organ Soins. 2011;42(3):187-94
Dépistage du cancer chez les personnes handicapées : pratiques et difficultés spécifiques en établissement médico-social
Authors: Couëpel Laurence , Bourgarel Sophie , Piteau-Delord Monique
Published: November 2014

Résumé Objectifs : Cette étude vise à identifier les pratiques des structures d’hébergement pour personnes handicapées en matière de dépistage systématique du cancer, de repérer les difficultés rencontrées pour le réaliser, et enfin de faire émerger d’éventuels besoins en formation de personnel-relais. Méthodes : Nous avons réalisé 28 entretiens semidirectifs auprès des personnels de direction ou en charge du dépistage, dans 15 % des établissements pour adultes handicapés de la région PACA. Résultats : Les troubles du comportement affectant certains résidents rendent délicate la réalisation des examens de dépistage, et amènent parfois à leur nonréalisation, ou à la mise en place d’examens de remplacement. La faible médicalisation de ces institutions entrave la mise en place du dépistage. Parmi les établissements interrogés, la moitié n’a pas pu réaliser la mammographie de dépistage pour toutes les résidentes concernées. Les trois-quarts de ces établissements n’ont pas été en capacité d’effectuer le test Hémoccult II chez tous leurs résidents de 50 ans et plus. Le personnel éducatif, majoritaire dans ces établissements, n’est pas formé ou psychologiquement prêt pour assurer cette nouvelle mission, liée au vieillissement des résidents. Des formations à destination de ce personnel sont cependant souhaitées par les responsables interrogés. Conclusion : Un protocole relatif au dépistage systématique, adapté aux personnes handicapées, pourrait être élaboré pour que celui-ci trouve sa place dans les établissements médico-sociaux. Des outils accessibles aux personnes handicapées pour leur expliquer le cancer et son dépistage pourraient être réalisés. C’est aussi l’accès aux soins et en aval l’hospitalisation qu’il faut adapter aux personnes handicapées. Prat Organ Soins. 2011;42(4):245-253
Incidence des bactériémies nosocomiales dans les services à haut risque du centre hospitalier universitaire de Casablanca (Maroc)
Authors: Hassoune Samira , Nani S , Ouhadous Mohamed , Aalloula O. , Benbachir M. , Maaroufi A
Published: November 2014

Résumé Objectif?: Mesurer l’incidence des bactériémies nosocomiales (BN) dans les services à haut risque et décrire les portes d’entrée, les germes et l’évolution clinique. Méthodes?: Une étude longitudinale a été menée du 1 er mars au 31 mai 2005 dans six services à haut risque du CHU de Casablanca. Résultats?: Au total, 61 BN ont été diagnostiquées, 34,4 % des patients sont décédés. L’incidence cumulée était de 9,60 % en réanimation adulte, 2,70 % en réanimation pédiatrique et 6,46 % en hémato-oncologie. Dans 5 % des cas, la bactériémie était reliée à la présence d’un cathéter veineux central. Les germes les plus fréquents étaient Staphylococcus coagulase négative (19,3 %) et Acinetobacter baumanii (13,2 %). Conclusion?: L’incidence retrouvée était élevée et la mortalité forte, concordantes avec celles des pays en développement. Ces résultats permettront de mettre en place un programme de prévention ciblé et d’évaluer l’efficacité des interventions. Prat Organ Soins. 2012;43(1):19-24
La prise en charge des affections transitoires bénignes en médecine générale : avec ou sans médicaments ?
Authors: Bedoin D. , Charles Rodolphe
Published: November 2014

Résumé Objectifs : Les médecins généralistes reçoivent souvent des patients présentant des affections transitoires bénignes caractérisées par une évolution naturelle spontanément favorable. Pourtant, la prescription médi camenteuse reste considérable dans ce cadre. Ce travail essaie de cerner les logiques de prescription médicamenteuse pour ces affections. Méthodes : Le service universitaire de médecine générale de Saint-Étienne a réalisé une enquête qualitative en 2011 auprès de médecins généralistes de la Loire. Résultats : Les médecins oscillaient entre deux logiques. La première visait à « réparer » le patient avec des médicaments, parfois des placebos impurs (justification par l’expérience de leur efficacité et de leur innocuité) ; prescrire permettait d’entretenir la confiance des patients tout en maintenant une image de puissance ; les critiques médico-économiques auxquelles sont soumis les médicaments (déremboursements, recommandations) étaient récusées. La seconde était « restrictive » en médicaments, le soin passant par la réassurance et les conseils ; les placebos impurs étaient critiqués (effets secondaires, malhonnêteté, relation de dépendance) ; les recommandations constituaient une aide face au patient. Conclusion : Deux modèles s’opposent : un modèle empirique dans lequel les comportements des médecins et des patients se renforcent mutuellement au gré d’expériences positives ; un modèle factuel visant à déterminer l’utilité d’un soin pour le patient – rapport bénéfice/(risque+coût) comparé à celui des alternatives thérapeutiques. Ceci interroge sur le rôle des médecins face aux affections transitoires bénignes. Pour le clarifier, une réflexion critique sur la pharmacopée, le rôle attribué au médecin par la société et l’organisation des soins semble nécessaire. Prat Organ Soins. 2012;43(2):111-119
Les consultations non appropriées aux services des urgences : étude dans un hôpital provincial au Maroc
Authors: Berraho Mohamed , Boly A. , Tachfouti N. , Elmajjaoui Abdelkhalik , Nejjari C.
Published: November 2014

Résumé Objectif  : Le recours non approprié aux services des urgences diminue la qualité des prestations. Notre objectif était de déterminer les facteurs associés au recours non approprié à ces services. Méthodes : L’étude a été réalisée dans le service des urgences du Centre hospitalier provincial de Nador, durant trois semaines. L’information a été recueillie sur un questionnaire. La définition de la consultation appropriée ou non s’est basée sur le caractère urgent ou non, le jour de la consultation (ouvrable ou férié), le moment de la consultation (jour/nuit) et sur l’ancienneté des symptômes. Résultats : Sur l’effectif de 410 patients, la proportion des consultants non appropriés était de 30,7 %. Les consultants non appropriés disposaient d’une couverture sociale dans 9,9 % vs 18,3 % chez les consultants appropriés (p = 0,02) ; la proportion des patients inquiets à agités était plus importante chez les consultants non appropriés (62,3 % vs 31,7 %) (p < 10 –6 ) ; la majorité (88,9 %) des consultants appropriés ressentaient leur état moyennement à très urgent vs 45,2 % chez les autres (p < 10 –6 ) ; le délai d’apparition des symptômes était plus court chez les consultants appropriés (p < 10 –6 ) ; la proportion des consultants pour des lésions traumatiques était significativement plus importante chez les consultants appropriés que chez les autres (59,2 % vs 0,8 %) (p < 10 –6 ). Conclusion  : Cette étude a identifié plusieurs facteurs prédictifs d’une consultation non appropriée. Des actions sont à entreprendre pour promouvoir le bon usage du service des urgences. D’autres études auront à préciser les spécificités régionales et hospitalières. Prat Organ Soins. 2012;43(3):197-204
Entre dedans et dehors : les parloirs
Authors: Ricordeau Gwenola
Published: November 2014

Résumé À partir d’une observation participante et d’entretiens réalisés avec des personnes incarcérées et des proches de détenus, nous proposons une lecture des parloirs sous l’angle de la confrontation du dehors et du dedans . Les parloirs sont envisagés successivement sous l’angle de l’espace qu’ils constituent au sein de l’institution carcérale, des temporalités qu’ils produisent et des acteurs qu’ils convoquent. Les sociabilités et les solidarités intra/extra muros que dévoilent les parloirs, comme les règles et les usages du lieu-parloir et les rythmes sociaux induits par le moment-parloir, font apparaître les ambiguïtés de la frontière dedans/dehors et les formes variées de l’expérience, par les détenus et leurs proches, de la liberté et de l’enfermement.
Des profanes en justice
Authors: Jellab Aziz , Giglio-Jacquemot Armelle
Published: November 2014

Résumé Les jurés de cour d’assises se situent à l’arrière-plan des chroniques judiciaires et les médias n’en parlent souvent que pour en évoquer le rôle dans les arrêts prononcés. Pourtant, l’expérience de ces « juges d’un jour » révèle les contradictions d’une justice qui, en faisant appel à des « citoyens » issus du peuple, les oblige à se socialiser à des pratiques judiciaires et à un rôle auquel ils sont peu préparés. Cette socialisation s’opère sur fond d’interrogations quant à leur légitimité mais aussi d’interactions avec des magistrats dont le statut, les stratégies d’accueil et les manières d’organiser les débats à l’audience comme lors du délibéré, en font des professionnels dominants et au pouvoir susceptible d’être perçu comme démesuré. Le fait que les jurés sont censés juger des faits tandis que les magistrats jugent selon le droit introduit une hiérarchie subtile où, d’un côté, c’est le « bon sens » et « l’émotion » qui contribueraient à la formation du jugement, tandis que, de l’autre, c’est la « raison » et la « loi » qui seraient à l’œuvre. La contestation du pouvoir des juges et de certaines de leurs pratiques par les jurés est une manière de défendre l’idée que l’on ne peut juger sans un regard « humain » dont on découvre le lien avec l’histoire biographique du citoyen-juge. Cette contestation illustre les paradoxes d’une institution qui maintient la fiction d’une égalité entre citoyens tout en organisant en pratique la perpétuation de certaines formes de domination. Cela amène à s’interroger sur l’héritage « démocratique » que constitue la cour d’assises, sur la « démocratie délibérative » qui la caractérise, et sur les effets sociaux de cette expérience quant à l’engagement des anciens jurés dans l’espace public.
La situation coloniale entre guerre et paix
Authors: Blévis Laure
Published: November 2014

Cet article se propose de revenir sur les controverses portant sur la caractérisation et la qualification du régime colonial français (étudié ici au travers de son laboratoire algérien). Cette étude permet de dégager plusieurs figures : la situation coloniale comme guerre permanente, comme état d’exception ou comme régime ambivalent oscillant entre la paix et la guerre. Cependant, ces controverses ne sont pas que théoriques ou scientifiques, elles ont été présentes tout au long de la colonisation. L’exception coloniale a même été régulièrement dénoncée en France comme dans la colonie au nom de l’écart entre les principes métropolitains de gouvernement et les pratiques coloniales. L’ambiguïté du régime colonial a non seulement pesé sur les administrations coloniales qui ont eu à rendre compte de leurs actions et à les justifier, mais elle a également nourri les mobilisations des différents acteurs de la colonie, aussi bien colons que colonisés.
Seismic ringing effect in the shallow subsurface
Authors: Rubin Shimon , Shtivelman Vladimir , Keydar Shmariahu , Lev Aner
Published: November 2014

We refer to the seismic ringing effect as a dynamic response of a localized shallow heterogeneity in the ground to an incident wave field originated either from a seismic source operating at the surface or from a background noise. On the seismograms the seismic ringing wave field usually appears as a long wave train with a pronounced resonant character concentrated above the localized subsurface heterogeneity.

Based on the theoretical and numeric analysis of the frequency and amplitude characteristics of the ringing signals, we suggest different mechanisms that can explain the underlying features of the effect. Quantitatively, the results of our study show an excellent agreement, with an error less than 5% between analytical, numerical models and field experiments for the invoked normal modes inside the localized subsurface heterogeneity, and at least 85% agreement between the analytical model for the flexural modes and field experiments.

Potentially, the ringing effect may be exploited in shallow subsurface surveys, and structural mapping of subsurface terrain.
The Growth of Industry Web Portals
Authors: Zhou Duanning , Djatej Arsen , Sarikas Robert , Senteney David
Published: November 2014

This article proposes a growth framework for industry web portals which present a new opportunity in the Internet business. The proposed framework contains five stages: business plan stage, website development stage, attraction stage, entrenchment stage, and defense stage. The actions to be taken and strategies to be applied in each stage are set out. Two industry web portals are investigated in detail. The two examples illustrate the applicability of the proposed growth framework to the real world. The combination of a conceptual growth framework and the application of this conceptual framework to two real world examples yields a set of guidelines based in large part on lessons learned from the two examples. Thus, this paper provides a concept-based growth framework and a set of real world-based guidelines that will very possibly provide a practical benefit to industry web portal business practitioners.
Integration between Mathematical Programming and Fuzzy Logic to Optimize Consumers Behavior
Authors: Fazlollahtabar Hamed , Tehranchian Amir Mansoor
Published: November 2014

The concept of utility is used as a decision tool for consumers to choose a commodity. Analyzing consumer behavior is complicated due to the qualitative nature of the utility. Hence, this paper investigates a quantitative method to evaluate the utility of consumers. The methodology is based on linguistic expressions of fuzzy logic. Initially, the authors identify different parameters being effective on utility of a consumer. Then, using fuzzy linguistic expressions the quantitative value of utility are determined. Also some statistical analyses are set to investigate the effective parameters on the utility. Consequently, the optimization is done applying mathematical nonlinear programming. Some analysis is performed as sensitivity study. A case study is conducted to verify the applicability and effectiveness of the proposed methodology.
An Evaluation Framework for Context of Use in Mobility
Authors: Mowafi Yaser , Zmily Ahmad
Published: November 2014

Context information is commonly linked to various physical and user activities embedded in users' everyday lives. Research has mainly focused on sensing and inferring context information, yet the relevancy among these contexts is rarely investigated. In this paper, the authors propose an analytical framework for modeling and evaluating collected context data and the nature of relevancy among these data towards defining context awareness. They validate the proposed framework on a case study using a dataset that incorporates users' activities in various situations and surrounding environment scenarios. The framework provides preliminary guidelines for determining representative measures of user and physical context in the design and evaluation policies of context awareness in mobile human computer interaction.
Consumer Intention to Use Anti-Spyware Software
Authors: Suki Norazah Mohd , Ramayah T. , Nee Au Soo , Suki Norbayah Mohd
Published: November 2014

Awareness of the importance to install anti-spyware software in one's computer has increased in this digital world. This research aims to investigate the relationship between relative advantage, moral compatibility, ease of use, subjective norms, image, computing capacity, perceived cost, and trialability, and the consumer intention to use the anti-spyware software. Data was coded and analyzed in the Statistical Package for Social Science (SPSS) computerized software version 21 and analyzed by means of Exploratory Factor Analysis (EFA). Next, Structural Equation Modeling (SEM) technique via Analysis of Moment Structure (AMOS) computer program version 21 was used for data analysis in order to achieve the research objective. Results validated the hypotheses and revealed that five vital factors: Ease of use, relative advantage, image, perceived cost, and moral compatibility influenced consumer intention to use the anti-spyware software. The ease of use dimension has the greatest impact on consumer intention to use the anti-spyware software. The developers of the anti-virus software or the software development companies should specifically target the right target groups, in terms of its market segmentation, targeting, and positioning, to boost up consumer awareness and deployment of the anti-spyware software. This research brings implication in terms of it does help the researchers and IT professionals to understand factors that influence consumer intention to use anti-spyware software.
Research on Indoor 3D Location Technology Based on RSSI
Authors: Mao Bo Xin , Liu Shan , Chai Jian Ping
Published: November 2014

With the rapid development of mobile communication, the GPS (Global Positioning System) which provides real-time global positioning system has not been able to meet the needs of the indoor accurate positioning. Through simulation, this paper implements the method of indoor three-dimensional positioning based on RSSI compared the positioning accuracy under several kinds of noise. We achieve the good indoor three-dimensional positioning method with the combination of cost, positioning accuracy and positioning precision through the filter and secondary positioning which establishes special propagation model for various different environments.
Multi Screen Interactive Technology in SMART TV Operating System
Authors: Qi Na
Published: November 2014

With the gradual promotion of triple-place services and development of network technology, digital TV is gradually penetrating into daily life from conceptualization. Among them, the sharing of home entertainment information through multiple-screen interactive system is one of the most important components in digital home networks. This study firstly deeply analyzed the system architecture and functional units of DLNA; and then proposed one possible technical solution to implement multiple-screen interactive system in NGB TVOS1.0 based on DLNA agreement and characteristics of smart TV operating system. With this solution, multimedia resources like video, picture and music could be shared, controlled and managed among smart phone, personal computer and TV through network.
Shadow Fading Correlation Based on the Additive Model
Authors: Liu Xiao Min , Yang Hong Wen , Hu Hao
Published: November 2014

In mobile wireless communications, the received signal power is modeled as a combination of path loss, shadow fading and small-scale fading. In previous studies, the lognormality of the shadow fading is generally explained as a multiplicative model. In [1] the author proposed an additive model as a physical basis for shadowing within an "extended local area", where the shadowing can be written as the logarithm of the power of the plane waves. In this paper, based on the additive model, we focus on the correlation of the shadow fading in two extended local areas, the analytical expressions are presented for the correlation coefficient (ρ) of the shadow fading.
Ball-Nose Vehicle's Atmospheric Parameters Estimation Based on Airflow Velocity
Authors: Qian Li Lin , Tao Jian Wu , Yu Fei , Dai Hai Fa
Published: November 2014

The airflow velocity over blunt sphere is used to calculate ball-nose vehicle's atmospheric parameters about angle of attack, angle of sideslip and flight speed. A final model satisfying compressible flow is developed, and the expressions for atmospheric parameters is derived from three strategically selected sensors' velocity. The expressions of atmospheric parameters are verified through Fluent stimulation. The result of stimulation demonstrates a good accuracy of angles and flight speed, and the system has a good real-time performance.
Construction of a Digital Microlithography System Based on Violet Semiconductor Laser
Authors: Li Hao Wei , Gong Yong Qing , Zhang Wei Wei , Xiahou Ming Jiu
Published: November 2014

A digital mask microlithography system is designed and constructed, which employs a 405nm semiconductor laser diode as light source, and uses a DMD (Digital Micro-mirror Device) as high-precision digital mask. The microstructure array with logo and optical grating has been obtained successfully on this system. Lithography results have been evaluated carefully with the aid of microscope and white light scanning profiler. The feasibility of the microlithography system has been further proved.
Analysis and Calculation of Earth Pressure Based on Nonlinear Theory
Authors: Zhang Wen , Zhang Bin , Zhang Wei Hong , Li Sheng Wei , Luo Yan Zhen , Liu Xin , Ren Xiu Ling , Wei Kai
Published: November 2014

The results of the model test and field test which are proposed in soil pressure calculation indicate that soil pressure distribution is mostly non-linear. Using two models, the soil arching effect and horizontal unit by two theories of rigid retaining wall and non-linear soil pressure, combine with test material to calculate and analysis. The soil arching effect model calculated value on the upper part of retaining wall is higher than horizontal unit model, closer to the static soil pressure, which mainly relates to the upper part of the soil arching effect expresses in sufficiently. As the soil arching effect expresses in the lower part, its value is lower than horizontal unit model; both total soil pressure are the same; the resultant force point of the soil arching effect is higher than the horizontal unit model, the results of calculation and analyses are more well coincide to the virtual discipline. Basing on it, putting forward a kind of soil pressure calculation model which considers the space-time effect and reflects the soil pressure distribution is non-linear.
Phase Field Simulation of Effect of Super-Cooling Degree on Nickel Dendrite Growth
Authors: Li Shu Ting
Published: November 2014

The phase field coupling with the temperature distribution field is a good method to simulate the dendrite growth during isothermal solidification. The effects of super-cooling degree on the dendrite growth are studied in the process of Nickel isothermal solidification. The results indicate that super-cooling degree has an important effect on the dendrite growth. When the super-cooling degree is small, the rate of crystal growth all is small and the shape of Crystal nucleus is an approximative ball. As super-cooling degree increases, the rate of crystal growth become large fast and the main branch Grow up quickly and its shap become long and thin, and secondary branch appear in the root between every two main branch. Ever, as the super-cooling degree become very large, the more arm dendrite appear and the rate of the main branch is smothered.
The Research of Three-Phase Power System Data Detecting Device Based on ADUC836
Authors: Huang Pei
Published: November 2014

In the distributed power system, many data in every node needs to be monitored, but the function of current electrical measuring instruments is limited, which make it difficult for organizing a full function node. This paper proposes a kind of analyzer for measuring key data of three-phase power system, and this analyzer is designed on MCU-ADUC836 with mini transformer. Functions of data monitoring, record and online analyzing are realized by it, and the result shows that the embedded three-phase power system data analyzer obtains characters of high accuracy and reduces the number of measuring instruments in the distributed power system.
The Study of the Difference Methods with Variable Grids Seismic Wave Numerical Simulation in Multi-Scale Complex Media
Authors: Zhang Jie , Meng Fan Shun , Li Yang Sen
Published: November 2014

In the process of seismic wave field numerical simulation using finite difference method, the simulation accuracy and computational efficiency is one of the keys to the problem which is especially important to the numerical simulation of small scale geological body which velocity changes violently. In order to describe the local structure of medium subtly and guarantee the efficiency of the simulation, this article introduces the variable grid finite difference method to the staggered grid high-order finite difference numerical simulation on the basic of the traditional staggered grid finite difference algorithm to improve the staggered grid spatial algorithm and avoid the reduction of the simulation accuracy and computational efficiency caused by the interpolation factor. The results show that the variable staggered grid numerical simulation of finite difference algorithm can accurately depict the space variation of underground medium physical properties to further enhance the adaptability of numerical simulation of complex medium, it also can provide reliable basis for wave field imaging and the combined interpretation of p-wave and s-wave.
Reactive Power Optimization Analysis of 35KV Regional Power Grid Based on the Genetic Algorithm
Authors: Huang Pei
Published: November 2014

As we know, the load of power grid keeps increasing in recent years, and the difference of power pink and trough is large. This situation causes the low efficiency of power consuming. In this paper, the integer coded genetic algorithm is used to carry on the reactive optimization of 35KV power gird, which includes operations of genetic algorithm, such as coding, selecting, crossing, and mutating. The genetic algorithm is illustrated in IEEE30 points system and the optimization of maximum operational mode, the results show that this method decreases the loss and ensure the qualified rate of voltages, realizing the optimization of the power gird.
Adaptive Genetic Algorithm Based Parameters Optimization of PI Controller for Battery System in Wind Farm
Authors: Ren Hui , Wei Dan , Watts David , Fan Jia Qi
Published: November 2014

The randomness and intermittence of wind farm real power generation bring challenges to power system operation, and installing battery system for the mitigation of the fluctuation of wind farm output, following the short-term forecasting curve, even adjusting the output according to the operator’s requirement is a possible way to address the problem from the wind farm side. After a review of various storage control strategies for stabilizing the fluctuation of wind power output, the model of battery energy storage system as well as its control strategy is introduced. Adaptive Genetic Algorithm (AGA) is used for the optimization of PI control parameters. Simulation shows the effectiveness of the proposed method. Moreover, comparing with the trial-and-error method, the optimization algorithm proposed has the advantage of finding the optimal parameters under the lack of experience on PID control, and combined with trial-and-error method, the difficulties engineer could face on tuning the parameters of PI controller is decreased, which increases the feasibility for parameters of PI controller’s being transplanted to similar applications.
HA Coating on the Surface of Titanium and Titanium Alloy
Authors: Hu Liang , Chen Yu Qiong , Xing Xiao Feng , Gao Wei Min
Published: November 2014

In this paper, the common problems of the preparation of hydroxyapatite (HA) bioactive coating on the surface of titanium and titanium alloy were described, which included bonding strength and biological activity. The improvement of the bonding strength between coating and matrix could be reached by using proper preparation method and changing the composition and structure of the coating. Besides, in order to improve the biological activity, micro regulation of three factors including the roughness, porosity and crystallinity of the coating surface could been used.
The Application of New Type Fiber to the Sports Equipment
Authors: Yang De Yu
Published: November 2014

This paper aims to promote the development and application of new fiber material with its products to the field of sports products, from the physical and chemical properties of fiber, as well as producing process, finishing and sorting process and so on. Since each kind of new textile fiber material has been widely used, such as carbon fiber, Outlast fiber, aramid fiber, moisture absorption perspiration functional fiber, negative ion function fiber, which is popular with customers. Moreover, fiber fabrics such as: waterproof and breathable fabric, low resistance movement fabric, ultra high strength fabrics in sports is also introduced in this paper.
Preparation of a Poly(Lactic Acid)/Montmorillonite Nanocomposite
Authors: Nakanishi Ko , Yamagata Shuichi , Akasaka Tsukasa , Abe Shigeaki , Yoshida Yasuhiro , Iida Junichiro
Published: November 2014

Poly (L-lactic acid)/organically modified montmorillonite (PLLA/OMMT) nanocomposites were fabricated by a solution intercalation method. OMMT, modified with quaternary alkylammonium ion, was prepared by alkyltrialkoxysilane. The differential scanning calorimetry measurement revealed that the crystallization temperatures of PLLA/OMMT nanocomposites were at around 110 °C regardless of the existence of OMMT or the weight fraction of them. X-ray diffraction patterns suggested that the (001) diffraction was around 2θ = 2.5°. The TEM image showed variously expanded interlayer galleries of OMMT and partially exfoliated silicate layer unit in the matrix. Board-shaped specimens for mechanical property tests were fabricated by compression-molding at 190 °C (including 30 min annealing at 110 °C). The flexural modulus of the nanocomposites increased with increasing content of OMMT. Vickers hardness of the nanocomposites were almost same independent on weight fraction of OMMT.
Dissolution Behavior of Zinc from Gel Composites Consisting of Calcium Phosphate and Alginate
Authors: Uchino Tomohiro , Negishi Yusuke , Oguma Keito
Published: November 2014

Amorphous calcium phosphate (ACP) is known as one of the precursors of bone hydroxyapatite (HAp). The ACP transforms into low crystalline HAp around 40°C. Zinc (Zn) is an essential trace element for the human body and has an important role in bone formation. Osteoporosis has been linked to Zn deficiency. Biomaterials that release Zn at site of bone resorption can potentially inhibit the progression of osteoporosis. In this study, we successfully prepared Zn-releasing injectable materials that consisting of ACP and alginate gel. We investigated the Zn dissolution behavior from these composite samples in environment that imitate bone metabolism. The Zn containing gel released Zn into an acetic acid buffer, which mimics the environment of osteoclast activity. In contrast, the gel sample did not released Zn when soaked in a simulated body fluid (Kokubo’s solution), a solution that mimics the environment of osteoblast activity and cell quiescence. Therefore, the ACP/alginate gel composite that is cross-linked with Zn2+ could control the rate of release in Zn. These gels are expected to be a Zn controlled-release intelligent material.
Physico-Chemical Characteristics of TiO2 Derived Nanotube Synthesized by the Hydrothermal Process as a Bioceramic
Authors: Eslami H. , Moztarzadeh F. , Jafarzadeh Kashi T.S. , Solati-Hashjin M. , Khoshroo K. , Tahriri M.
Published: November 2014

Titania (TiO2) nanotube gaining predominance as a bioceramic due to its excellent features such as high specific surface area and exhibiting appropriate cellular response. At present, we showed a conversion from titania nanoparticle to nanotube by hydrothermal treatment with 10M soduim hydroxide and 1M HCl solutions at 150°C over 48h. Then the sample annealed at various temperatures. Results indicate the reaction temperature is a main factor in determining the aspect ratio of the tubes. FESEM image conformed the synthesis of nanotube. In vitro study by using 150 °C-synthesized nanotube calcined at different temperatures are also presented establishing the potential of nanotubes in biomedical applications
Sintering Behavior of Nanostructured Hydroxyapatite Ceramics
Authors: Delgado José A. , Alonso Lizette Morejón , Nacimento Juliana , Macedo Karla P. , Antunes Alexandre , Varella Marize , Alfonso Adrian , Martínez Salvador , García-Vallès Maite
Published: November 2014

The synthesis of nanoparticles appropriate for the preparation of nanostructured hydroxyapatite ceramics intended for bone repairs and regeneration is an interesting field of biomaterials research today. In this work nanoparticles of hydroxyapatite were obtained by the precipitation method using conventional magnetic stirring (A) and ultra turrex homogenizer (T1) accompanied with surfactant (T2) and dispersant agents (T3). In all cases, powders with nanometric dimensions were obtained and the unique calcium phosphate phase detected was hydroxyapatite (HAp). The powders sintering behaviour was studied. The ceramics obtained from powders prepared by magnetic stirring (A) showed the best values of final density (96.7 %) which it was in agreement with the lowest temperature of the beginning of shrinking (648.6 °C) during sintering determined by dilatometry. Nanostructured nature of these ceramics was confirmed by Scanning Electron Microscopy (SEM).
HA/TCP Scaffolds Coated by PLA and Gelatin: Preliminary In Vitro Evaluation
Authors: Rodrigues Leonardo Ribeiro , de Carvalho Zavaglia Cecília Amélia , Lombello Christiane Bertachini
Published: November 2014

The importance of this work is development of two methods to try to improve the bone tissue regeneration. The surface of scaffold was modified in order to favor cell interaction, through adhesion and proliferation. PLA and gelatin were used. PLA has shown in literature good results in bone tissue engineering. The gelatin is used as coating in cell culture plates to improve cell attachment for a variety of cell types, including osteoblast. Hydroxyapatite (HA) and tricalcium phosphate (TCP) were used due to its known properties in tissue engineering. It was used the polymer foam replication technique to produce the scaffolds. For characterization were used: scanning electron microscopy (SEM), optical microscopy (OP), stereoscopy, transmission electron microscopy (TEM), X-ray microtomography (Micro-CT), X-ray diffraction (XRD) and X-ray fluorescence (XRF). The scaffolds showed morphology with adequate porosity for tissue engineering and thein vitrotest showed evidence of not being cytotoxic.
Characterization of Human Osteoclasts on Different Bioceramics
Authors: Nakamura Miho , Hentunen Teuvo , Vääräniemi Jukka , Salonen Jukka , Hori Naoko , Yamashita Kimihiro
Published: November 2014

@font-face { font-family: "ＭＳ 明朝"; }@font-face { font-family: "Cambria Math"; }@font-face { font-family: "@ＭＳ 明朝"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0mm 0mm 0.0001pt; font-size: 10pt; font-family: "Times New Roman"; }.MsoChpDefault { font-size: 10pt; }div.WordSection1 { page: WordSection1; } Bioresorbable materials may be advantageous for use in bone regeneration applications because they do not leave residues of foreign material, improving the long-term success of implant restoration. The purpose of this study was to investigate the osteoclastogenesis and bioresorption of synthesized calcium phosphate ceramic materials for orthopaedic and dental biomaterial applications. Differentiation into mature human osteoclasts on carbonated hydroxyapatite (CA) was significantly enhanced compared to hydroxyapatite (HA). Osteoclasts derived from human peripheral mononuclear blood cells adhered and differentiated into giant multinuclear TRAP- positive cells on every type of synthesized sample based on the histological analysis. Morphological observations using fluorescence and quantitative analysis revealed that the actin rings of osteoclasts on CA were thick and small in diameter, similar to the rings found on bone slices. Scanning electron microscopic images and quantitative analysis indicated that the resorption pits on CA were significantly deeper than those on HA due to the enhanced tight sealing ability between osteoclasts and their substrate.
In Vivo Evaluation of Chelate-Setting Cement Fabricated from Hydroxyapatite Including Bone Minerals Using a Rabbit’s Tibia Model
Authors: Aizawa Mamoru , Chibu Yuki , Nagata Kohei , Konishi Toshiisa , Ishii Ken , Funao Haruki , Toyama Yoshiaki , Matsumoto Morio , Honda Michiyo
Published: November 2014

Hydroxyapatite (HAp) is one of components of bone and teeth, and has an osteoconductivity. Thus, the HAp has been used as biomaterials for bone graftings. We have succeeded in development of the novel chelate-setting calcium-phosphate cement (CPC) using pure HAp particles surface-modified with inositol phosphate (IP6). While, biological apatite presented in bone and teeth of mammals contains various ions: Na+, K+, Mg2+, Cl-, F- and CO32-, in addition to Ca2+ and PO43- ions. In this work, in order to create the chelate-setting CPC with enhanced osteoconductivity, the above-mentioned biological apatite powder (hereafter, bone HAp), instead of pure HAp, was used as a starting powder for fabrication of the chelate-setting cement. The biocompatibility of the resulting chelate-setting bone HAp cement (hereafter, IP6-bone HAp cement) was examined using a rabbit’s tibia model. When the living reaction to hard tissue was histologically examined after 4 weeks implantation, we could observe that newly-formed bone directly bonded to the surface of the specimen. The newly-formed bone was also present around the cement specimen. The amounts of newly-formed bone around IP6-bone HAp cement was about 1.5 times those around IP6-pure HAp cement without bone minerals. The above findings demonstrate that the present IP6-bone HAp cements are one of the promising candidates as novel CPC with enhanced osteoconductivity.
Bioceramic Materials Show Reduced Pathological Biofilm Formation
Authors: Piconi Corrado , Ionescu Andrei Cristian , Cochis Andrea , Iasi Erica , Brambilla Eugenio , Rimondini Lia
Published: November 2014

The aim of the present work was to assess the surface ability of three bioceramic materials (A: alumina BIOLOX®forte; B: Si3N4; C: alumina matrix composite BIOLOX®delta) to inhibit bacterial biofilm formation. For this purpose, ceramic disks at standardized roughness (Ra = 0,25 μm) were used as test materials while commercial polystyrene was considered as control. Two biofilm-producing bacterial strains (S. epidermidis ATCC14990, Escherichia coli ATCC25922) were used for experiments. The viable biomass was assessed by the metabolic MTT assay after 24h incubation. Morphological data regarding biofilms structure were obtained by scanning electron microscopy. In general, results revealed that all bioceramics materials were significantly less colonized compared to polystyrene. The degree of biofilm formation onto bioceramics ranged between about 30 to 60% less than the polystyrene control. Moreover, some differences were noticed by comparing the three bioceramics inhibition ratio: bioceramic A showed significanlty less S. epidermidis biofilm formation (p<0.005) compared to B and C that showed similar performance. Conversely, no difference were noted for E. coli biofilm amount for A, B and C. In conclusion, the tested materials showed capability to reduce biofilm formation to a different extent depending on the tested bacterial strains.
Investigations on the Thermo-Mechanical Properties of CrN/CrCN Gradient Coatings Using a Thermo-Dilatometric Method
Authors: Szparaga Łukasz , Myśliński Piotr , Gilewicz Adam , Ratajski Jerzy
Published: November 2014

The paper describes issues related to the use of dilatometric methods for the study of thermo-mechanical properties of PVD gradient coatings. Tests were conducted on three types of CrCN / CrN coatings, which differed in the nature of the change of physico-chemical parameters in the gradient transition layer, deposited on a molybdenum substrate with the use of the cathodic arc evaporation method. The scope of the experimental studies included an analysis of the changes of the thermal “extortion” of the substrate – PVD coating system during annealing processes. In parallel, for comparison purposes, a mathematical description was proposed of gradient coatings containing the transition functions of material parameters. These functions describe the changes of such parameters as the Young's modulus, the Poisson's ratio, the thermal expansion coefficient, and the density as a function of spatial variables. Using the mathematical description proposed, numerical calculations of the state of thermal stress and strain for coatings are represented, respectively, by the transition function forms (a stepped, square, and square root) were carried via FEM. Based on the experimental and computational results obtained, the comparison between the elongation of the tested samples, and the state of thermal stress and strain in the substrate-gradient coating systems analysed were all specified.
Corrosion Resistant Layers Produced in Vacuum Titanizing Process on a Low Carbon Steel Surface Coated Electrolytically with Cobalt
Authors: Kasprzycka Ewa
Published: November 2014

Diffusion layers produced on low-carbon steel and iron surfaces by means of vacuum titanizing process have been studied. A new technological process combining a vacuum titanizing with a preliminary electrolytic deposition of cobalt has been proposed to increase the corrosion resistance of layers. As a result, diffusion duplex layers of a Ti+Co type on the low-carbon steel and iron surfaces have been obtained. The layers microstructure, their thickness, phase composition and concentration depth profiles of elements in the diffusion zone of these layers have been investigated. Microstructure studies of these layers were performed by metallographic microscopy, X-ray diffraction, and a SEM electron microscope with a BSE and an EDS spectrometer. In addition, the layers hardness and their corrosion resistance have been determined. Corrosion measurements were performed in 0.1 M H2SO4 by means of potentiodynamic polarization and electrochemical impedance tests. The highest corrosion resistance was observed for steel samples with the Ti+Co type duplex layers, which showed the least passive current density and the highest charge transfer resistance, whereas the titanized layers, and the steel without any layer, corroded actively.