bluuebunny/crossref_metadata_2025 huggingface dataset:
La formation continue, un moyen de réduire les inégalités salariales entre hommes et femmes ?
Authors: Havet Nathalie , Lacroix Guy
Published: July 2014

Résumé L’objet de cet article est d’évaluer le rendement salarial de la participation à une formation continue en entreprise (formelle et informelle), en centrant l’analyse sur les différences entre sexes. Pour ce faire, les données françaises de l’enquête Formation continue 2000 sont mobilisées. On estime un modèle d’équations simultanées afin de tenir compte, à la fois, du phénomène de sélection endogène des pratiques de formation et des effets corrélés de l’hétérogénéité individuelle inobservable entre les différents types de formation et les salaires. Il ressort qu’en France le rendement d’une formation formelle est plus élevé pour les femmes que pour leurs homologues masculins et que le rendement d’une formation informelle est équivalent pour les deux sexes.
Construction de logements sociaux et stratégies électorales locales
Authors: Schone Katharina
Published: July 2014

L’article étudie si les choix des élus locaux en matière de logement social sont influencés par des considérations stratégiques électorales, contrecarrant alors les efforts de l’État en faveur d’une plus grande mixité sociale. À travers un modèle de vote probabiliste intégrant une population partiellement mobile, nous démontrons que de telles considérations stratégiques rendent les choix politiques de communes voisines interdépendants et que l’intensité de ces interactions stratégiques varie en fonction de la mobilité des individus. Ces propositions sont corroborées par une analyse empirique concernant la politique de logement social des communes du Grand Lyon, suggérant que la volonté d’un élu local de construire des logements sociaux pourrait effectivement être régie par des réflexions concernant les conséquences de ce choix politique sur l’évolution de sa base électorale à long terme.
Accessibilité ou voisinage ?
Authors: Goffette-Nagot Florence , Schaeffer Yves
Published: July 2014

La théorie économique identifie deux principaux mécanismes de ségrégation résidentielle selon le revenu : (i) le tri spatial résultant de l’arbitrage des ménages entre accessibilité aux emplois et prix du logement, et (ii) le tri entre municipalités, dû à l’hétérogénéité des offres de biens publics locaux et aux préférences pour l’environnement social. L’analyse économétrique des choix de localisation des ménages migrants au sein des grandes aires urbaines françaises met en évidence une contribution d’égale importance de ces deux modalités dans la ségrégation entre groupes socioprofessionnels, tandis que le tri par la distance au centre-ville domine nettement dans la ségrégation entre Français et étrangers.
Géographie économique des morts de 14-18 en France
Authors: Gilles Henri , Guironnet Jean-Pascal , Parent Antoine
Published: July 2014

Cet article exploite la nouvelle base de données « Mémoire des Hommes » (MdH) et le recensement de 1911. Pour analyser la disparité géographique des morts de la Grande Guerre, nous avons évalué le potentiel de mobilisables par département puis testé un modèle économétrique incluant des variables démographiques, économiques, géographiques et spatiales pour identifier les facteurs influençant le nombre de ces morts. Si les raisons démographiques ressortent comme les principaux déterminants, la prise en compte des facteurs économiques, géographiques et spatiaux permet d’expliquer significativement les disparités du nombre de morts entre régions.
Calcul par simulations du pouvoir des électeurs dans le cas de la loi électorale du 29 juin 1820
Authors: Vidu Laurent
Published: July 2014

Cet article détaille les résultats de simulations informatiques effectuées en appoint d’un travail théorique mené par Le Breton et Lepelley [2011]. On s’efforce, en particulier, de mettre en évidence des résultats auxquels l’exercice analytique ne peut aboutir.
Une approche stratégique du vote
Authors: Allisson François , Brisset Nicolas
Published: July 2014

Ce texte a pour ambition de revenir sur une procédure d’expérimentation destinée à tester l’impact du vote par approbation ainsi que du vote par note sur l’ampleur de ce qu’on a coutume d’appeler le vote utile. Les résultats de ces expériences, menées lors des élections présidentielles françaises de 2007 et de 2012, ont fait l’objet de deux articles publiés dans la Revue économique. Notre objectif est ici d’attirer l’attention du lecteur sur la conception implicite qui sous-tend ces expériences : le vote comme outil de dévoilement des préférences individuelles. Une telle orientation se fait au détriment d’une conception stratégique du vote, c’est-à-dire envisagé comme processus de coordination. La procédure expérimentale mise en place tend à gommer cette dimension, en ne fournissant pas aux votants de repères informationnels relatifs aux choix d’autrui. On parlera à cet effet d’isolation informationnelle.
Vote par approbation, vote par note
Authors: Baujard Antoinette , Gavrel Frédéric , Igersheim Herrade , Laslier Jean-François , Lebon Isabelle
Published: July 2014

Nous répondons ici au commentaire de François Allisson et Nicolas Brisset au sujet de notre article « Vote par approbation, vote par note. Une expérimentation lors de l’élection présidentielle du 22 avril 2012 » paru en 2013 dans la Revue économique (n? 64). Nous développons cinq points à même de nuancer leur principale affirmation selon laquelle le contexte informationnel dans lequel ont été menées ces expériences de vote ne permet pas de conclure à l’évacuation du dilemme entre vote sincère et vote utile.
Les délégués syndicaux sont-ils discriminés ?
Authors: Breda Thomas
Published: July 2014

Cet article présente une première estimation du salaire des délégués syndicaux et discute ses possibles interprétations. Après avoir rappelé le contexte institutionnel français en matière de négociation en entreprise, nous explicitons les spécificités théoriques de l’interaction stratégique entre employeurs et délégués syndicaux lors de cette négociation. Nous discutons notamment les raisons pour lesquelles il peut être rationnel pour un employeur de discriminer les délégués syndicaux. En mobilisant des données employeur-employés et une stratégie économétrique originale, nous estimons que, sous des hypothèses plausibles, les salaires des délégués syndicaux sont en moyenne 10 % inférieurs à ceux de leurs collègues syndiqués et non syndiqués. Plusieurs tests suggèrent que cet écart de salaire pourrait effectivement refléter une discrimination à l’égard des délégués. Cette interprétation est cohérente avec le ressenti des délégués syndicaux : près d’un sur deux s’estime discriminé, et cette proportion varie avec leurs caractéristiques observables de manière similaire à leur pénalité salariale.
Performance à l'exportation et commerce Sud-Sud
Authors: Diaw Diadié , Rieber Arsène , Tran Thi Anh-Dao
Published: July 2014

Cette étude analyse les spécificités sectorielles du commerce Sud-Sud en retenant le commerce bilatéral des pays d’Afrique sub-saharienne sur la période 2000-2009. Dans un premier temps, nous décomposons les performances à l’exportation d’un pays entre la contribution de l’accès au marché extérieur et celle relevant des capacités d’offre internes. Dans un second temps, nous endogénéisons les capacités d’offre en fonction de l’accès au marché par l’introduction d’effets de débordement générés par la demande (demand spillovers) . L’interaction entre les deux forces en présence (retombées de demande versus tensions provoquées sur le marché des facteurs) est ici différenciée par stade de production et par zone d’exportation au Sud.
Fiscalité des retraités, redistribution et équité
Authors: Legendre Bérangère
Published: July 2014

Cet article met en évidence les effets d’une fiscalité différenciée entre actifs et retraités sur l’exposition à la pauvreté, le risque d’inégalité et les niveaux de vie relatifs des actifs et des retraités. Cette analyse est menée à la lumière des critères d’équité de Rawls et Sen. Nous traitons cette question à l’aide d’une approche comptable du niveau de vie en décomposant pour chaque individu les étapes de redistribution depuis le versement des revenus primaires jusqu’à la perception des revenus secondaires. Le statut de retraité n’étant plus, en moyenne, synonyme de situation précaire, la fiscalité dérogatoire dont ils bénéficient ne semble pas correspondre à la poursuite d’un objectif rawlsien de justice sociale. En revanche, l’existence de taux préférentiels de prélèvements sociaux réduit la surexposition des retraités non imposables à la pauvreté.
Home Modification and Prevention of Frailty Progression in Older Adults: A Japanese Prospective Cohort Study
Authors: Mitoku Kazuko , Shimanouchi Setsu
Published: July 2014

The aim of this study was to determine whether home modification was associated with subsequent progression of frailty and mortality in older adults. We conducted a prospective cohort study in 574 adults 65 and older who required a low or moderate level of care. Of these, 34% modified their homes—most frequently a corridor—and the most common type of modification was the installation of handrails. The mortality was significantly lower among older adults with home modifications than in those without home modifications at 2 years (adjusted hazard ratio [HR] = 0.52; 95% confidence interval [CI] [0.32, 0.87]), 3 years (HR = 0.57, 95% CI [0.54, 0.81]), and 4.7 years (HR = 0.65, 95% CI [0.65, 0.91]). These findings suggest that home modification may prevent the progression of frailty (i.e., need for low/moderate level of care increasing to the need for high level of care) in older adults. [
Journal of Gerontological Nursing, 40
(8), 40–47.]
Family Caregiving for Husbands with Stroke: An Occupational Perspective on Leisure in the Stress Process
Authors: Kniepmann Kathy
Published: July 2014

This study adapted the Stress Process Model with occupational assessments to identify stress, leisure changes, burden levels, and health-related quality of life in 20 caregivers of working-age husbands with mild to moderate stroke in the past 2 years. Primary stress was based on participants' perceptions of their husbands' functional behavior skills. Secondary strain was indicated by reduction of leisure activities that the caregivers wished to still do or do more—a phenomena labeled Leisure Loss. Outcomes were burden and health-related quality of life. Wives whose husbands had more functional behavior difficulties experienced significantly more Leisure Loss. Wives with Leisure Loss had significantly higher burden scores than those who continued their leisure participation, but health-related quality of life scores were not different. These findings suggest that leisure participation is important as health promotion for family caregivers, with potential to enhance health of the relative with stroke and the entire family.
Translation and Cross-Cultural Adaptation of the Perceived Efficacy and Goal Setting System (PEGS): Results from the First Austrian-German PEGS Version Exploring Meaningful Activities for Children
Authors: Costa Ursula M.
Published: July 2014

Occupation-based participatory assessment and treatment planning requires appropriate tools to explore clients' perceptions and priorities for their day-to-day lives. Currently, no such instrument is available in German for use with children and their proxies. This study aimed to translate and adapt the Perceived Efficacy and Goal Setting System (PEGS) for use in German-speaking regions. Translation, adaptation, and field testing of the Austrian-German PEGS version followed guidelines for cross-cultural adaptation of self-report assessments. Forty-two children, ages 5 to 10, with various health conditions, their parents, and teachers participated in this study. The Austrian-German PEGS was successfully translated and culturally adapted. Children, their parents, and teachers reported the child's competences related to the addressed items and identified goals for intervention. Participants added specific culturally relevant activities. Data can now be used to further develop the PEGS for German-speaking regions and to continue research on culturally meaningful activities for children and families. [OTJR: Occupation, Participation and Health. 2014; 34(3):119–130.
The Correlation between Physical Activity and Grade Point Average for Health Science Graduate Students
Authors: Gonzalez Eugenia C. , Hernandez Erika C. , Coltrane Ambrosia K. , Mancera Jayme M.
Published: July 2014

Researchers have reported positive associations between physical activity and academic achievement. However, a common belief is that improving academic performance comes at the cost of reducing time for and resources spent on extracurricular activities that encourage physical activity. The purpose of this study was to examine the relationship between self-reported physical activity and grade point average (GPA) for health science graduate students. Graduate students in health science programs completed the International Physical Activity Questionnaire and reported their academic progress. Most participants (76%) reported moderate to vigorous physical activity levels that met or exceeded the recommended levels for adults. However, there was no significant correlation between G PA and level of physical activity. Negative findings for this study may be associated with the limited range of GPA scores for graduate students. Future studies need to consider more sensitive measures of cognitive function, as well as the impact of physical activity on occupational balance and health for graduate students in the health fields.
Personality as a Moderator of Cognitive Stimulation in Older Adults at High Risk for Cognitive Decline
Authors: Hill Nikki L. , Kolanowski Ann M. , Fick Donna , Chinchilli Vernon M. , Jablonski Rita A.
Published: July 2014

This exploratory study examined the moderating effects of personality traits on cognitive function following a cognitively stimulating individualized activity intervention delivered to individuals at high risk for cognitive declinethose with delirium superimposed on dementia. Data were taken from an ongoing randomized clinical trial with the addition of a personality measure. The results for 71 participants randomized to intervention or control groups are reported. Significant moderating effects of personality traits were found such that participants with higher agreeableness were more likely to have improved delayed recall and those with lower extraversion were more likely to have improved executive function, as a result of the intervention. Lower openness, higher agreeableness, and lower conscientiousness were associated with greater engagement in the intervention. A cognitive stimulation intervention for older adults at high risk for further cognitive decline may be differentially effective based on certain personality traits.

[Res Gerontol Nurs. 2014; 7(4):159–170.]
La norma informal de empleo y el deterioro de la condición de ciudadanía. El caso de la industria del calzado en Elda, Alicante
Authors: De Castro Pericacho Carlos , Arnal Sarasa María , Lahera Sánchez Arturo
Published: July 2014

Desde ﬁnales de los años setenta numerosos sectores de diversas regiones geográﬁcas han desarrollado una estrategia integral de reducción de costes para mantener su posición competitiva en las redes de la economía global. Uno de los puntos que han incluido estas estrategias de desarrollo ha sido la ﬂexibilización de las condiciones de trabajo. En muchas ocasiones, llevando al extremo su propia lógica, la ﬂexibilización ha conducido a una informalización generalizada de la actividad económica y del empleo como estrategia de competitividad. La extensión de la informalidad y la temporalidad del empleo en un sector no solo implica en sí misma el deterioro de los derechos laborales sino que además impide acceder a otro tipo de derechos socioeconómicos (prestación por desempleo, jubilación, sanidad; entre otros) con lo que se produce un deterioro de la condición de ciudadanía. Este artículo propone describir los principales rasgos de la norma informal de empleo que se ha conﬁgurado en el sector del calzado para indicar que tales condiciones de trabajo representan, por sí mismas, un deterioro de la condición de ciudadanía. El artículo se basa en una investigación del sector del calzado en Elda.
Mobile Health Systems for Bipolar Disorder
Authors: Mayora Oscar , Frost Mads , Arnrich Bert , Gravenhorst Franz , Grunerbl Agnes , Muaremi Amir , Osmani Venet , Puiatti Alessandro , Reichwaldt Nina , Scharnweber Corinna , Troster Gerhard
Published: July 2014

This paper presents a series of challenges for developing mobile health solutions for mental health as a result of MONARCA project three-year activities. The lessons learnt on the design, development and evaluation of a mobile health system for supporting the treatment of bipolar disorder. The findings presented here are the result of over 3 years of activity within the MONARCA EU project. The challenges listed and detailed in this paper may be used in future research as a starting point for identifying important non-functional requirements involved in mobile health provisioning that are fundamental for the successful implementation of mobile health services in real life contexts.
Psychometric Assessment of Cardio-Respiratory Activity Using a Mobile Platform
Authors: Carbonaro Nicola , Cipresso Pietro , Tognetti Alessandro , Anania Gaetano , De Rossi Danilo , Pallavicini Federica , Gaggioli Andrea , Riva Giuseppe
Published: July 2014

It is increasingly recognized that stress has negative effects on growing numbers of people. Stress assessment is a complex issue, but different studies have shown that monitoring user psychophysiological parameter during daily life can be greatly helpful in stress evaluation. In this context, the European Collaborative Project INTERSTRESS is aimed at designing and developing advanced simulation and sensing technologies for the assessment and treatment of psychological stress, based on mobile biosensors.In this study a wearable biosensor platform able to collect physiological and behavioral parameters is reported. The developed mobile platform, in terms of hardware and processing algorithms, is described. Moreover the use of this wearable biosensor platform in combination with advanced simulation technologies, such as virtual reality, offer interesting opportunities for innovative personal health-care solutions to stress.
False Alarm Reduction Using Adaptive Agent-Based Profiling
Authors: Hacini Salima , Guessoum Zahia , Cheikh Mohamed
Published: July 2014

In this paper the authors propose a new efficient anomaly-based intrusion detection mechanism based on multi-agent systems. New networks are particularly vulnerable to intrusion, they are often attacked with intelligent and skilful hacking techniques. The intrusion detection techniques have to deal with two problems: intrusion detection and false alarms. The issue of false alarms has an important impact on the success of the anomaly-based intrusion detection technologies. The purpose of this paper is to improve their accuracy by detecting real attacks and by reducing the number of unnecessary generated alerts. The authors' intrusion detection mechanism relies on a set of agents to ensure the detection and the adaptation of normal profile to support the legitimate dynamic changes that occur and are the cause of high rate of false alarms.
Identifying Vulnerabilities of Advanced Persistent Threats
Authors: Nicho Mathew , Khan Shafaq
Published: July 2014

One of the most serious and persistent threat that has emerged in recent years combining technical as well as non-technical skills is the Advanced Persistent Threat, commonly known as APT where hackers circumvent the organizational defenses and instead target the naivety of the employees in making an unintentional mistake. While this threat has gained prominence in recent years, research on its cause and mitigation is still at the infancy stage. In this paper the authors explore APT vulnerabilities from an organizational perspective to create a taxonomy of non-technical and technical vulnerabilities. The objective is to enhance awareness and detection of APT vulnerabilities by managers and end users. To this end, the authors conducted interviews with senior IT managers in three large organizations in Dubai, United Arab Emirates. The analysis of the findings suggested that the APT threat environment is affected by multiple factors spanning primarily non-technical as well as technical vulnerabilities.
An Integrated Dynamic Model Optimizing the Risk on Real Time Operating System
Authors: Patra Prashanta Kumar , Pradhan Padma Lochan
Published: July 2014

This article provide maximum preventive control, high performance and fault tolerance at an optimal resources, cost, time with high availability and quality of services to be invested into dynamic security mechanisms deciding on the measure component of real time operating system resources (Shell, File, Memory, Processor, Kernel, Encryption key, I/O devices). The authors have to define, design, develop and deploy our valuable idea to be optimizing the technology, resource, cost and maximize the throughput, productivity of business all together at anytime and anywhere in around the globe by applying this integrated dynamic model. This dynamic model interfacing, integrating, communicating, synchroning, preventing and optimize step by step through real time algebraic method over a RTOS on distributed super scalar environment (MIMD). This proposed dynamic algebraic model would be preventing the data and services on RTOS from uncertainty, unorder, unsetup, unsafe and external hackers. Mean while this model would be identifying vulnerabilities and threats on operating system resources to achieving the highest business objectives by utilizing the efficient and reliable resources management. The authors have to optimized the system attacks and down time by verification and validation of this method on complex heterogonous infrastructure.
An Efficient Intrusion Alerts Miner for Forensics Readiness in High Speed Networks
Authors: Akremi Aymen , Sallay Hassen , Rouached Mohsen
Published: July 2014

Intrusion Detection System is considered as a core tool in the collection of forensically relevant evidentiary data in real or near real time from the network. The emergence of High Speed Network (HSN) and Service oriented architecture/Web Services (SOA/WS) putted the IDS in face of a typical big data management problem. The log files that IDS generates are very enormous making very fastidious and both compute and memory intensive the forensics readiness process. Furthermore the high level rate of wrong alerts complicates the forensics expert alert analysis and it disproves its performance, efficiency and ability to select the best relevant evidences to attribute attacks to criminals. In this context, we propose Alert Miner (AM), an intrusion alert classifier, which classifies efficiently in near real-time the intrusion alerts in HSN for Web services. AM uses an outlier detection technique based on an adaptive deduced association rules set to classify the alerts automatically and without human assistance. AM reduces false positive alerts without losing high sensitivity (up to 95%) and accuracy up to (97%). Therefore AM facilitates the alert analysis process and allows the investigators to focus their analysis on the most critical alerts on near real-time scale and to postpone less critical alerts for an off-line log analysis.
Two Rough Set-based Software Tools for Analyzing Non-Deterministic Data
Authors: Wu Mao , Nakata Michinori , Sakai Hiroshi
Published: July 2014

Rough Non-deterministic Information Analysis (RNIA) is a rough set-based framework for handling tables with exact and inexact data. Under this framework, the authors have coped with several issues, for example, possible equivalence relations, data dependencies, rule generation, rule stability, question-answering as well as missing and interval values as special cases of non-deterministic values. In this paper, the authors at first survey a software tool in Prolog and C for dealing issues like rule generation and question-answering, then we report the current state of our new web tool called getRNIA. The authors also propose a new issue focusing on the estimation of actual derived DIS from a Non-deterministic Information System, by employing constraints like Equivalence Classes, Data Dependency, Maximum Likelihood Estimation and Data Consistency.
A Particle Swarm Optimization Approach to Fuzzy Case-based Reasoning in the Framework of Collaborative Filtering
Authors: Tyagi Shweta , Bharadwaj Kamal K.
Published: July 2014

The particle Swarm Optimization (PSO) algorithm, as one of the most effective search algorithm inspired from nature, is successfully applied in a variety of fields and is demonstrating fairly immense potential for development. Recently, researchers are investigating the use of PSO algorithm in the realm of personalized recommendation systems for providing tailored suggestions to users. Collaborative filtering (CF) is the most promising technique in recommender systems, providing personalized recommendations to users based on their previously expressed preferences and those of other similar users. However, data sparsity and prediction accuracy are the major concerns related to CF techniques. In order to handle these problems, this paper proposes a novel approach to CF technique by employing fuzzy case-based reasoning (FCBR) augmented with PSO algorithm, called PSO/FCBR/CF technique. In this method, the PSO algorithm is utilized to estimate the features importance and assign their weights accordingly in the process of fuzzy case-based reasoning (FCBR) for the computation of similarity between users and items. In this way, PSO embedded FCBR algorithm is applied for the prediction of missing values in user-item rating matrix and then CF technique is employed to generate recommendations for an active user. The experimental results clearly reveal that the proposed scheme, PSO/FCBR/CF, deals with the problem of sparsity as well as improves the prediction accuracy when compared with other state of the art CF schemes.
Incremental Learning Researches on Rough Set Theory
Authors: Liu Dun , Liang Decui
Published: July 2014

Rough set theory is an effective tool to deal with information with uncertainty, and has been successfully applied in many fields. Incremental learning as an efficient strategy for data analysis in dynamic environment enables acquiring additional knowledge from new information by using prior knowledge and has drawn the widespread attentions of many scholars. In this paper, the authors discuss the status of incremental learning researches on rough sets and give potential future research directions. The authors first review basic concepts of rough sets and list three variations of information system in the dynamic decision procedures. Then, the authors investigate and summarize the corresponding incremental learning strategies for the three variations with different research viewpoints, respectively. Finally, the authors further tease out the research framework of our work and identify some future possible research directions.
Scientific Knowledge Transfer Training Through a Virtual World
Authors: Martin-Suarez Ana , Benito Juan Cruz , Pérez-Blanco Jonás Samuel , Millan Mª del Carmen Gutierrez , Castañeda Aranzazu Zarzuelo , Gomez Hinojal Zazo , Martin Cristina Maderuelo
Published: July 2014

The aim of this study was to use the virtual world Second Life (SL) to perform a knowledge transfer training to Pharmacy students. The presentation of assignments of different subjects was organized as scientific congress communications. The activities were carried out at the facilities created at the USALPHARMA Island in SL. The content and format of these works, together with their oral presentation and interventions in debates were evaluated. These experiences provided adequate learning results and a high level of student satisfaction. This teaching strategy can foster development of creativity, critical thinking, communication, co-teamwork and digital competence. Likewise, it can facilitate teacher-student relations and relations among the students themselves. It also implies significant savings in time and money, since real facilities and equipment and physical movement of people are not involved. All of this encourages us to recommend this platform to host all kinds of conferences or scientific conferences.
Hydrothermal Synthesis and Upconversion Properties of Yb3+, Tm3+ Co-Doped Gd6MoO12 Phosphor with Regular Morphologies
Authors: Sun Jia Yue , Xue Bing , Di Qiu Mei , Xu Qi Guang , Han Liu
Published: July 2014

Yb3+, Tm3+ co-doped Gd6MoO12 phosphors were prepared by the hydrothermal method. After tuning the PH value and EDTA, phosphors present different morphologies including hexagonal prisms, spindles, and spheres. Under 980nm excitation, the upconversion luminescence properties of the as-prepared phosphors are studied based on changing the synthesis condition. It is found that usage of EDTA and pH changing both play crucial key in the formation of morphology. Pumping power on the UC luminescence properties and level diagram mechanism of Gd6MoO12:Yb3+/Tm3+phosphor have also been discussed.
A Study on the Resistive Switching of La0.7Sr0.3MnO3 Film Using Spectromicroscopy
Authors: Lee Hong Sub , Kang Kyung Mun , Han Woo Je , Lee Tae Won , Park Chang Sun , Choi Yong June , Park Hyung Ho
Published: July 2014

Resistive random access memory (ReRAM) is a promising candidate for next generation nonvolatile memory. La0.7Sr0.3.MnO3 (LSMO) of perovskite manganite family has a great deal of attention for ReRAM material because it makes resistive switching (RS) of interface type without a “forming process”. However, the full understanding of the electronic structure and RS mechanism of LSMO remains a challenging problem. Therefore, this study performed spectromicroscopic analysis to understand the relation between the change of electronic structure and RS characteristic. The results demonstrated the electron occupation by field-induced oxygen vacancies and strong correlation effects.
A Method to Select Optimal Cutting Force Model Using the Measured Process Transfer Function
Authors: Zhu Ming , Yu Xun Xing , Xiao Wei Wei , Mao Kuan Min
Published: July 2014

The cutting stability is determined by the dynamics of the tool-workpiece and the cutting process. Several cutting force models have been established by the former researches. Based on the analysis of the cutting process transfer function derived from the cutting force models, the characteristics of these models were analyzed in this work by ploting the function curves in the complex frequency plane. The curve shapes and centers were considered as the indicator to estimate the suitability of a cutting force model. An experimental method was proposed to select suitable cutting force model for a real cutting process.
Buckling Behavior of Catheter Reinforced with Braids under Axial Compression after Torsion: Effect of Deformation Speed on Buckling Region
Authors: Kato Yasuyuki
Published: July 2014

The purpose of this research is to investigate the relation between the deformation speed and the buckling phenomenon of the catheters, which is made of soft nylon resin and is reinforced with thin stainless wires called braid. In general, the buckling phenomenon of the catheter is complicated because the different types of several loads such as torsion and bending are applied simultaneously to the catheter. In this study, as the initial step to reveal the buckling behavior under combined loading state, the buckling behaviors under combined loading of compression and torsion are examined. Especially, in this study, the buckling tests under various initial torsion are conducted by changing the axial displacement speed. And then, the effect of the stress relaxation on the occurrence region of buckling under combined loading state is revealed in this paper.
The Influence of Base Pre-Tilting on the Dynamic Properties of Angle Towers
Authors: Li Yong Ping , Li Long , Yang Xiao Yu
Published: July 2014

As a significant bearing tower that is widely adopted in the electric transmission line, the angle tower is frequently found over-tilting in the inspection and maintenance of transmission lines. On the basis of the massive universal finite element software ANSYS, this study establishes a three-dimensional steel frame for the commonly used 500kV angle tower in the Inner Mongolian area, and analyzes the dynamic properties of angle towers while setting the base pre-tilting. It also conducts model analyses for the towers with or without base pre-tilting respectively, compares the frequency and mode of vibration, and paves way for further study of the setting of base pre-tilting and vibration response analysis.
Cathodic Prevention and Cathodic Protection of Concrete Slab with Zinc Sacrificial Anode
Authors: Jeong Jin A
Published: July 2014

This study is to acquire the confirmation data regarding the cathodic protection and cathodic prevention characteristics for concrete slab specimens in marine environments. It was possible to confirm the performance of cathodic protection system by the measurement of potentials and current density for the concrete slab specimens applied with zinc mesh sacrificial anode in mortar topside of the concrete specimens. The current density for the cathodic protection (CProt) that CP started after a repair of corrosion was higher than that for the cathodic prevention (CPrev) that CP commenced from the beginning of experiment, and 4 hour depolarization potentials were higher in the CPrev system than in the CProt one, and it was confirmed that the CPrev has more protection effect with less protection current, comparing to the CProt. It was also confirmed that the CP of both CPrev and CProt by means of zinc mesh sacrificial anode for reinforced concrete structures were very effective corrosion protection technology in marine environments.
Application of Fuzzy Control Theory in Obstacle Avoidance Simulation of Intelligent Wheelchair
Authors: Li Fang
Published: July 2014

This paper introduces application of the fuzzy control theory in obstacle avoidance simulation of intelligent wheelchair. Aiming at the path planning problem of intelligent wheelchair, with information fuzzy theory, based on the information acquisition of ultrasonic sensors installed in the intelligent wheelchair, processed by fuzzy logic algorithm, then the fuzzy controller of fuzzy control theory was constructed in Matlab, so intelligent wheelchair obstacle avoidance simulation was conducted. The results show that this method can effectively avoid the obstacles, realize the continuous movement of intelligent wheelchair.
Development of Practical Wrist Rehabilitation Robot by Mirror Effect
Authors: Yamamoto Ikuo , Matsui Miki , Inagawa Naohiro , Tsuji Takunori , Hachisuka Kenji , Wada Futoshi , Hachisuka Akiko
Published: July 2014

The authors have developed wrist rehabilitation robot for hemiplegic patients. The robot is much effective for repetitive rehabilitation, and useful for patients. Mirror effect control system is developed based on the experience that a patient can easily move a limb while moving a limb on the other side. The effectiveness is successfully confirmed by the practical test in the hospital.
Monte Carlo Simulation of the Dispersion of Carbon Nanotubes in Cement Matrix
Authors: Wang Bao Min , Zhang Yuan , Yu Ming Li , Han Yu
Published: July 2014

In this paper, the dispersion of carbon nanotubes (CNTs) in cement matrix was analyzed by Three-dimensional Monte Carlo Simulation. A Hard core model was employed which was not allow the intersection among CNTs in a simulated three-dimensional representative volume element (3-D RVE). The position and the orientation of CNTs were assumed to follow the uniformly random distribution. The results showed that CNTs were dispersed randomly and it was helpful for the further simulation calculation about mechanical, conductivity and piezoresistivity properties.
Research about Deformations Identification for Globoidal Cam Machine Based on Multi-Body System Theory
Authors: Zhao Li Ping , Chen Hong Ren , Yao Yi Yong , Zhao Hu , Yan Peng
Published: July 2014

Deformation error caused by cutting heart and external force is one of the key factors influencing machining precision in machining process. Aiming to identify the machine deformation which has the most important influence on machining precision, an identification method for sensitive error and deformation based on multi-body system theory has been proposed, which lay the basis of stiffness distribution of a machine tool and structure optimization of parts. At the end of this paper, the effective of this method is verified by using the machine tool for globoidal cam.
The Skimmer Selection Based on Fuzzy Decision in Response to Oil Spill
Authors: Zhang Yin Dong , Liu Yang
Published: July 2014

The decision method based on Fuzzy Synthetic Evaluation is presented to achieve skimmer selection in oil spill response. Firstly, the evaluation index system of skimmer is determined. Secondly, the fuzzy set theory is introduced to achieve quantification of skimmer qualitative indexes and the evaluation matrix of skimmer is established by expert investigation. Then the alternative skimmers are evaluated by the method of Fuzzy Synthetic Evaluation, and the optimal selection of skimmer can be obtained.
Preparation of Amorphous Silicon Carbide Nanostructures via Solvothermal Method
Authors: Li Huan Xiang , Li Gong Yi , Hu Tian Jiao , Li Xiao Dong , Yang Yun Quan
Published: July 2014

A solvothermal method was developed to synthesize silicon carbide nanoﬂakes and nanowires through pyrolysis of polymethylsilane (PMS) at 550 °C in solution. Evidences from HRTEM, SAED, FTIR and XPS indicated that the products were amorphous nanostructures which mainly consisted of Si, C elements and trace amount O element. Owing to concrete quantum confinement effects, the unique nanostructures have strong photoluminescence centered at 410-430 nm under excitation wavelength of 350 nm
Research on Overloading Protection of Permanent Magnetic Coupler in Coal Mine
Authors: Yuan Wen Qi , Liu Yue , Li Dong , Meng Guo Ying
Published: July 2014

In this paper, with simulations and experiments analysed by the software of Ansoft Maxwell, research on overloading protection of permanent magnetic coupler in coal mine is carried out and the conclusive curves of mechanical characteristics are plotted through experimental data. The conclusion can be gained from mechanical characteristic curves: when the output value of torque reaches the maximum torque of magnetic coupler, the output torque and speed will drop along with increases of the slip, and the input power value of motor is less than the power value at the time when the motor torque value is at the maximum. It explains that the magnetic coupler has the function for overloading protection.
An All-Digital, Cyclic and Synthesizable TDC in the ADPLL-Based Clocking Digital Systems for Multidomain Power Management
Authors: Chen Shao Hua , Lin Ming Bo
Published: July 2014

In this paper, we propose an all-digital, cyclic and synthesizable TDC architecture, which may be used as a core block in ADPLLs to replace the analog block as a phase/frequency detector and a charge pump. Traditional designs of the DVFS scheme for multidomain power management are based on a conventional analog PLL to generate the dynamic voltage and frequency in which the use of a digital TDC eliminates the need for current sources in conventional analog PLLs.
A Novel Adaptive UKF and its Application in the SINS/GPS Integrated Navigation
Authors: Li Yong , Gao She Sheng , Yang Yi
Published: July 2014

This paper reports the solution of the state estimation problem of nonlinear systems without knowing prior noise statistical characteristics. An adaptive UKF algorithm is proposed. This novel UKF algorithm is constructed by traditional UKF and EM algorithm, also it improve accuracy through Taylor series approximation. By applying the proposed algorithm into SINS/GPS integrated navigation system and comparing with the unscented Kalman filtering (UKF) algorithm, the adaptive UKF algorithm we proposed can effectively improve the filtering performance , also it outperforms UKF in terms of accuracy.
Doped TiO2 Nanotube for Lithium Ion Battery
Authors: Hu Xiao Xiao , Liu Jian Xiong , Wu Zheng Yu , Zheng Xin Rui , Ma Miao
Published: July 2014

Doped TiO2 nanotubes for lithium ion batteries have attracted extensive attentions over the recent years, owing to their better electrochemical performances than bare TiO2 nanotubes. The forms of doping are various, depending on different dopants and preparation methods. In this paper, the preparation methods of doped TiO2 nanotubes, the forms of doping and the impacts on electrochemical performances for LIBs are reviewed. Meanwhile, the mechanism of doping is described briefly. The new directions of research on this field are proposed.
Finite Element Analysis of Key Component on Two Wheels Scooter
Authors: Huang Zhi Dong , Du Yun Pu , Liu Bao Quan , Yang Guang , Liu Yu Feng , Zhao Xin Guang
Published: July 2014

Based on Solidworks software, the three-dimensional model of two wheels scooter is set up. The finite element model of two wheels scooter is generated. Finite element analysis of driving system on two wheels scooter is investigated. The stress and strain of driving system is investigated. The stress diagram and the strain diagram are obtained. The method and the result can be used as a reference of innovative design of two wheels scooter.
Secondary Developments of ANSYS for Temperature and Stress Field Simulation of Brake Disc Based on VB
Authors: Wu Meng Ling , Zhu Xiao Yu , Zuo Jian Yong
Published: July 2014

In the ANSYS finite element analysis with large-sized computer there is always a need for repeatedly modeling some similar questions. By using both the ANSYS for a secondary development platform and visual basic 6.0 for a visual operation interface, an APDL language is generated, so that a parametric modeling can be realized. With the help of the created software, the temperature and stress field contours of brake disc can be calculated and the efficiency of the calculation is enhanced.
Thermal Tuning of Vibration Band Gaps in Thin Phononic Crystal Plates with Nitinol
Authors: Zhao Hao Jiang , Liu Rong Qiang , Guo Hong Wei
Published: July 2014

Vibration band structures of thin phononic crystal plates (PCPs) with square array and graphite array of nitinol inserts are calculated by the plane wave expansion (PWE) method. The influences of filling fraction are considered when investigating the effects of the varying temperature on the band gaps. Vibration band gaps of these PCPs can be tuned by changing temperature. This study will be useful in designing PCPs with tunable gaps.
The Effect of Guide Sleeves on Shear Behavior of 3D Weaving Composites
Authors: Wu Xiao Chuan , Shan Zhong De , Liu Feng , Wang Yuan
Published: July 2014

In this study, guide sleeves are brought into 3D weaving composite preforms. The process vacuum assisted resin infusion (VARI) was used to fabricate the 3D weaving composite with guide sleeves. The load-deflection curves and shear behaviors of the 3D weaving composites with guide sleeves were obtained by means of the 3-point bending test. The fracture micrographs of the materials were studied by SEM. The effects of guide sleeves’ diameter and interval on the shear behavior and fracture mechanisms of the 3D weaving composites were analyzed. The results showed that the guide sleeves could prevent delamination effectively by bridging fiber layer and pinning crack extending along the fiber layer. Fracture toughness of the composite parts increase because of deformation, fracture of guide sleeves and debonding of interface. The diameter and interval of guide sleeves is smaller, which means the volume fraction of guide sleeves is higher, the interlaminar shear strength higher for the bridging is stronger.
Optimization of Surface Roughness in Micro-High Speed End Milling of Soda Lime Glass Using Uncoated Tungsten Carbide Tool with Compressed Air Blowing
Authors: Nurul Amin A.K.M. , Nassar Mahmoud M.A. , Arif Muammer Din
Published: July 2014

Soda lime glass is a very important material in diverse manufacturing industries, including automotive, electronics, and aerospace. In these applications, the glass surface needs to be defect free and without impurities. However, the machining of glass is difficult due to its inherent brittleness which leads to brittle fracture and easy crack propagation. This research investigates the high speed micro-end milling of soda lime glass in order to attain ductile regime machining. It has been found by other researchers that ductile mode machining can avoid brittle fracture and sub-surface cracks. Also, in this study, a special air delivery nozzle is used to blow away the resultant chips and keep the machined surface clean. To accomplish this, Design Expert software and a commercial NC end mill were used to design and perform the machining runs, respectively. The surface roughness of the resultant surfaces was later analyzed with a surface profilometer. Microphotographs of the machined surfaces were also taken in order to see how effective the air blowing method is. The results of surface roughness measurements were then used to develop a quadratic empirical model for surface finish prediction. Finally, desirability function and genetic algorithms were used to predict the best combination of cutting parameters needed to obtain the lowest surface roughness. The predictions were later tested by experiments. The results demonstrate that this type of machining is viable and the roughness obtained is very low at 0.049 μm.
Non-Melt Ultrasonic Bonding Method for Polymer MEMS Devices
Authors: Zhang Zong Bo , He Qing Qiang , Yan Cao Qing
Published: July 2014

Based on the theoretical study in our previous work, a novel thermal assisted ultrasonic bonding method for polymer Micro/nanoElectro-Mechanical Systems (M/NEMS) has been demonstrated. Bonding experiments of PMMA microfluidic chips with micro-channel of 80 μm in depth and width were conducted. The result shows numerous superiorities of this method including high bonding strength (0.95 MPa), low dimension loss (0.8% in depth and 0.3% in width, respectively) and short bonding duration.
Changing Deformation under the Machined Surface in the Cutting Zone for the Different Materials during Drilling
Authors: Jurko Jozef , Panda Anton , Behún Marcel
Published: July 2014

The basic hypothesis of this article focuses on the changes in the plastic deformation under the machined surface during drilling. For experiments applied a new Cast Iron GTW 35-04, Stainless steels DIN 1.4301 and ISO C45 carbon steel. The problem of drilling holes with diameter D=2 to 15 mm resides in the fact that 20 to 30% of these holes do not comply with prescribed requested requirements. This article presents the results of experiments focusing on the study of the damage process in helical drills with diameter d=6.0 mm. This study also includes an analysis of accompanying phenomena in the cutting zone by measuring some selected parameters.