bluuebunny/crossref_metadata_2025 huggingface dataset:
Lacan et les états-limites
Authors: Lebrun Jean-Pierre
Published: June 2012

Lacan ne cautionnait nullement ce concept d’« état-limite ». Il s’y est opposé par exigence de ne pas céder sur le fait d’avoir à répondre de la structure, névrotique, psychotique ou perverse. Pourtant, la phénoménologie des états-limites est de plus en plus fréquente. Y aurait-il là une quatrième structure ? Pour en rendre compte, j’ai parlé de perversion ordinaire , mais aussi de sujet des limbes , ou de mèreversion , et plus tard encore d’une économie de l’arrière pays. Ne serait-ce pas en ce cas toujours une névrose mais qui, effectivement, n’est plus patrocentrée ? De ce fait, la névrose orientée seulement selon le versant maternel – qui, rappelons-le, ne fait pas centre – est favorisée et donc est valorisée non pas une nouvelle économie psychique au sens d’un changement radical mais une névrose qui se présente très différemment. S’en suit une série de conséquences qu’il s’agit d’éclairer.
Soutenir le travail : une posture psychique face au chaos
Authors: Hatchuel Françoise
Published: June 2012

En reprenant l’histoire et les variations des termes Éros et Thanatos et des notions de notions de pulsion de vie et pulsion de mort, cet article s’efforce de montrer en quoi la définition d’Éros comme capacité à investir, due à Piera Aulagnier, et son corollaire qui positionnerait Thanatos du côté du découragement, permettent de situer le travail comme mode d’investissement possible pour lutter contre le chaos pulsionnel. Une des tâches centrales de l’analyse de pratiques consisterait alors à soutenir groupalement cet investissement.
Dimensions transnationales et culturelles des migrations turques en Europe
Authors: de Tapia Stéphane
Published: June 2012

Résumé La migration turque très largement distribuée dans le monde garde sa référence à une origine commune. Les entreprises y sont nombreuses. Entre pays d’origine et pays de résidence s’intercalent des pays de transit tandis que s’institue une circulation continue. La filière migratoire comme la migration internationale font jouer des traits culturels communs qui rapprochent les migrants et leur permettent de participer à la même économie collective. Le gouvernement essaie de les contrôler politiquement et religieusement, mais la plus grande formation intellectuelle des opposants leur donne un fort ascendant. On ne peut parler de diaspora tant les groupes sont à géométrie variable. La dimension économique de la culture a pris le dessus.
Circulation migratoire des transmigrants
Authors: Carnet Pauline , Alioua Mehdi , Qacha Fatima , Coulibaly-Tandian Oumoul Khaïry , Majdoubi Fatiha , Missaoui Hasnia-Sonia , Arab Chadia , Missaoui Hasnia-Sonia
Published: June 2012

Résumé Les travaux de recherche en cours sous la direction d’Alain Tarrius examinent de nombreux parcours migratoires à la lumière du concept de transmigration. Les parcours des Africains vers l’Europe ne visent plus l’embauche dans une grande entreprise, mais l’institution d’une pérégrination à base commerciale ou religieuse, qui implique le retour fréquent au pays. Le départ d’Afrique se fait lui-même par étapes plus ou moins longues pour trouver les bonnes opportunités de passage. Les femmes migrantes aussi constituent des réseaux d’alliés pour pouvoir se forger des espaces d’autonomie le long de leur route. L’analyse des transmigrations gitanes montre l’importance des réseaux familiaux dans ce parcours de l’espace.
L'institution de la prostitution de masse en Catalogne
Authors: Sistach Dominique
Published: June 2012

Résumé Depuis 2002, le gouvernement catalan a permis le développement de la prostitution en club. Cette légalisation donne un poids écrasant à l’institution sur les propos tenus sur la réalité. La prostitution s’est répandue dans le monde au fil des guerres et des séjours des armées d’occupation. En Europe, l’institution de la prostitution crée des enclaves d’avancée du libéralisme économique, gérées par les gouvernements locaux. Les femmes insèrent dans ces opportunités leur capital-corps, mais l’offre volontaire ne suffit pas à la demande, d’où le recrutement dans la migration, notamment d’Europe de l’Est de femmes assujetties par la nécessité de rembourser le passeur.
La dette : illusion comptable et aveuglement suicidaire
Authors: Moulier-Boutang Yann
Published: June 2012

Résumé Après avoir distingué entre différents types de dette, cet article propose une réflexion de fond sur l’obsolescence de la façon dont nos calculs économiques comptabilisent la création de richesse. La crise de la dette est d’abord une crise de la mesure. L’analogie de la pollinisation permet de faire comprendre ce dont il s’agit : nous ne comptons que le miel produit par nos activités sans inclure la pollinisation, ni prendre soin de la survie des abeilles. La dette est un artifice comptable, qui résulte de cette double cécité, dont certains abusent pour exploiter les autres. Elle risque de nous faire tous sombrer dans son aveuglement.
La dette est-elle bonne ou mauvaise ?
Authors: Guérin Isabelle
Published: June 2012

Résumé Le microcrédit, en Inde comme ailleurs, a été présenté ces dernières années comme un outil d’éradication de la pauvreté, permettant d’abolir des formes d’endettement informelles asservissantes, de soutenir la diffusion du capitalisme populaire et de promouvoir l’émancipation féminine. Plusieurs années de recherche en Inde rurale du Sud (Tamil Nadu) montrent que le microcrédit a surtout pour effet de renforcer une « démocratie de patronage ». La dette, sous toutes ses formes, reste un puissant moteur de paupérisation des travailleurs pauvres mais aussi de construction des identités individuelles et collectives et de différentiation sociale.
Assessment of Liver Function Using Hybrid Neuro-Fuzzy Model of Blood Albumin
Authors: Amer Mashhour Bani
Published: June 2012

This paper presents an assessment of liver function using novel neuro-fuzzy model of blood albumin level (BA). The developed model that is used to predict the BA consists of four inputs: Asparate Aminotransferace (AST), Alkaline Phosphate (ALP), Total Bilirubin (T. Bil.) and Total Protein (T. Prot.), which are measured in any routine liver function test. The proposed BA model was trained using 211 measured data and a root-mean square error (RMSE) of 0.29 for 100 epochs was achieved. The performance of the developed BA model was validated using 57 testing data sets and RMSE of 0.34 for 100 epochs was achieved. The correlation coefficient (CC) between the predicted and measured values of blood albumin is statistically significant (CC=0.83), which ensures the efficiency and accuracy of developed fuzzy model for predicting BA. The main clinical benefit of this model is that it improves the assessment capabilities of liver diseases and can be used as an integral part of any medical expert system denoted for assessment and diagnosis of liver disorders.
Characterization of HRV by Poincare Plot Analysis among the Female Tea Garden Workers of Northern Hilly Regions of West Bengal
Authors: Chatterjee Somsirsa , Ganguly Ankur , Bhattacharya Saugat
Published: June 2012

Recent research on Heart Rate Variability (HRV) has proven that Poincare Plot is a powerful tool to mark Short Term and Long Term Heart Rate Variability. This study focuses a comprehensive characterization of HRV among the Tea Garden Workers of the Northern Hilly Regions of West Bengal. The characterization, as available from the data sets, projects the average values of SD1 characteristics, that is, Short Term HRV in females as 58.265ms and SD2 as 149.474. The SDRR shows a mean value of 87.298 with a standard deviation of 119.669 and the S Characterization as 16505.99 ms and Standard deviation of 45882.31 ms. The SDRR shows a mean value of 87.298 with a standard deviation of 119.669 and the S Characterization as 16505.99 ms and Standard deviation of 45882.31 ms. ApEn Characterization showed mean value of 0.961 and standard deviation of 0.274.
Adaptive Learning Cycle to Improve the Competence-Building for Enterprise Systems in Higher Education
Authors: Peters Dirk , Haak Liane , Gómez Jorge Marx
Published: June 2012

Higher education institutes like universities cannot ignore the need to teach well known information systems, like ERP systems. Case studies are the most chosen way to introduce the handling of these systems to fulfill the needs of the international employment market and to provide a practical focus within the education. Effective teaching concepts have to improve this situation by considering the pedagogical aspects, which support the individual learning process of each student. This chapter discusses the changes and challenges of enterprise systems in higher education and provides an overview about the learning theory and the actual learning supporting technology as a basis for our concept. The approach considers actual needs of higher education, e.g. present learning in a lab as well as e-Learning courses supported by new methods in technology-enhanced learning by recording students’ behavior to guide them through the system. Therefore the authors introduce an Adaptive Learning Cycle which considers tracking and analyzing results deduced with mining methods to improve the learning progress. The aim is to achieve positive influences on the progress of the learning process to build up professional competence.
Corporate Governance of IT in Spanish Family Owned Enterprises
Authors: Arroyo Alberto J.
Published: June 2012

IT Corporate governance is the information technology-governing discipline of corporate governance.. Governing IT is not a simple discipline: researchers and practitioners have developed frameworks, best practices, etc. The standard ISO/IEC 38.500 sets the principles and activities to be carried in the organization to implement corporate governance of IT. Family-owned enterprises introduce a specific particularity regarding governance: the family. This paper presents an analysis of corporate governance of IT in family owned enterprises, considering this singularity, from the Spanish perspective. Also, it introduces two examples of implementation in family owned enterprises
Moving Towards a Knowledge City?
Authors: Yigitcanlar Tan
Published: June 2012

In the global knowledge economy, knowledge-intensive industries and knowledge workers are extensively seen as the primary factors to improve the welfare and competitiveness of cities. To attract and retain such industries and workers, cities produce knowledge-based urban development strategies, where such strategising is an important development mechanism for cities and their economies. This paper investigates knowledge-based urban development strategies of Brisbane, Australia that support generation, attraction, and retention of investment and talent. The paper puts forward a clear understanding on the policy frameworks, and relevant applications of Brisbane’s knowledge-based urban development experience in becoming a prosperous knowledge city, and concludes by providing invaluable insights and directions for other cities seeking knowledge-based urban development.
Modeling Operational Robustness and Resiliency with High-Level Petri Nets
Authors: Tavana Madjid , Busch Timothy E. , Davis Eleanor L.
Published: June 2012

Military operations are highly complex workflow systems that require careful planning and execution. The interactive complexity and tight coupling between people and technological systems has been increasing in military operations, which leads to both improved efficiency and a greater vulnerability to mission accomplishment due to attack or system failure. Although the ability to resist and recover from failure is important to many systems and processes, the robustness and resiliency of workflow management systems has received little attention in literature. The authors propose a novel workflow modeling framework using high-level Petri nets (PNs). The proposed framework is capable of both modeling structure and providing a wide range of qualitative and quantitative analysis. The concepts of self-protecting and self-healing systems are captured by the robustness and resiliency measures proposed in this study. The proposed measures are plotted in a Cartesian coordinate system; a classification scheme with four quadrants (i.e., possession, preservation, restoration, and devastation) is proposed to show the state of the system in terms of robustness and resiliency. The authors introduce an overall sustainability index for the system based on the theory of displaced ideals. The application of the methodology in the evaluation of an air tasking order generation system at the United States Air Force is demonstrated.
Energy-Efficiency in Cloud Computing Environments
Authors: Moreno Ismael Solis , Xu Jie
Published: June 2012

Due to all the pollutants generated during its production and the steady increases in its rates, energy consumption is causing serious environmental and economic problems. In this context, the growing use and adoption of ICTs is being highlighted not only as one as the principal problem sources but also as one of the principal areas that could help in the problem’s reduction. Cloud computing is an emerging model for distributed utility computing and is being considered as an attractive opportunity for saving energy through central management of computational resources. To be successful, the design of energy-efficient mechanisms must start playing a mayor role. This paper argues the importance of energy-efficient mechanisms within cloud data centers and remarks on the significance of the “energy-performance” relationship in boosting the adoption of these mechanisms in real scenarios. It provides an analysis of the current approaches and the outline of key opportunities that need to be addressed to improve the “energy-performance” relationship in this promising model.
Cloud Computing in Higher Education
Authors: Sasikala P.
Published: June 2012

Cloud Computing promises novel and valuable capabilities for computer users and is explored in all possible areas of information technology dependant fields. However, the literature suffers from hype and divergent definitions and viewpoints. Cloud powered higher education can gain significant flexibility and agility. Higher education policy makers must assume activist roles in the shift towards cloud computing. Classroom experiences show it is a better tool for teaching and collaboration. As it is an emerging service technology, there is a need for standardization of services and customized implementation. Its evolution can change the facets of rural education. It is important as a possible means of driving down the capital and total costs of IT. This paper examines and discusses the concept of Cloud Computing from the perspectives of diverse technologists, cloud standards, services available today, the status of cloud particularly in higher education, and future implications.
Cloud Computing Towards Technological Convergence
Authors: Sasikala P.
Published: June 2012

With the popularization and improvement of social and industrial IT development, information appears to explosively increase, and people put much higher expectations on the services of computing, communication and network. Today’s public communication network is developing in the direction that networks are widely interconnected using communication network infrastructure as backbone and Internet protocols; at the same time, cloud computing, a computing paradigm in the ascendant, provides new service modes. Communication technology has the trend of developing towards computing technology and applications, and computing technology and applications have the trend of stepping towards service orientation architecture. Communication technology and information technology truly comes to a convergence. Telecom operators are planning to be providers of comprehensive information services in succession. To adopt cloud computing technology not only facilitates the upgrade of their communication network technology, service platform and supporting systems, but also facilitates the construction of the infrastructure and operating capacity of providing comprehensive information services. In this paper, the development processes of public communication network and computing are reviewed along with some new concepts for cloud computing.
Shaping the Librarian’s Library
Authors: Searing Susan E.
Published: June 2012

Library and Information Science (LIS) is primarily a graduate program of study which prepares students for careers in librarianship and other information professions. However, faculty and students are not the only users of LIS collections in campus libraries; academic librarians also need LIS information to support their research and practice. Effective collection development for LIS is grounded in a well-thought-out policy statement and employs time-proven strategies including title-by-title ordering, approval plans, standing orders, and judicious acceptance of gifts. A well-rounded and responsive collection spans several publication formats and includes works from publishers that specialize in LIS content as well as non-commercial grey literature. The challenges that LIS selectors face include the proliferation of distance education programs, the interdisciplinarity of the field, the shifting landscape of electronic publishing, serial price increases, the drive for assessment, negative perceptions of the quality of the literature, and the need to promote collection use. Because there has been little written about LIS collection development practices, there are many opportunities for further research.
Collaborating with Faculty to Weed an Entire Science and Engineering Book Collection
Authors: Juskiewicz Scott , Garlish Betsy Harper
Published: June 2012

Weeding book collections and collaborating with faculty are necessary activities for academic libraries. Librarians, however, are often reluctant to remove books from collections and collaborating with faculty is often viewed as a difficult affair. In the fall of 2008 the Montana Tech Library, a small university library specializing in engineering, the sciences, and medicine, successfully collaborated with teaching faculty to weed the entire book collection. This chapter discusses how to successfully collaborate with faculty and offers advice on how to overcome the hesitation associated with weeding. Successful collaboration and overcoming the reservations of weeding can ultimately lead to the creation of a true “use collection” generated by customer driven collection development.
Serious Game for Relationships and Sex Education
Authors: Brown Katherine E , Bayley Julie , Newby Katie
Published: June 2012

This chapter illustrates the application of an Intervention Mapping approach to the development and design of a Serious Game addressing relationships and sex education (RSE) needs in British adolescents. Needs assessment identified experience of pressure/coercion in sexual relationships as the topic for a Serious Game-based RSE session. The process of applying intervention mapping including evidence review, identification of a programme goal, performance objectives and associated determinants, and change objectives are explicated. The way that these were translated into a concept and content for a Serious Game is explained. Evaluation plans grounded in the planning process, and commentary on challenges experienced, are also provided. The chapter provides an important contribution to approaches that can ensure efficacy of Serious Games applied to healthcare issues.
Promoting Collaborative Learning in Online Teacher Education
Authors: Zygouris-Coe Vassiliki I.
Published: June 2012

Online learning continues to grow as a learning option for millions of students in US colleges and universities. Collaboration plays an important role in student learning. This chapter presents information on how collaborative learning was designed and implemented in a comprehensive online course in reading for pre-service and in-service educators in grades P-12. The author presents details on course design issues, instructional practices, benefits, and challenges associated with collaborative learning in this online course, and implications for further development and evaluation of collaborative learning in teacher preparation programs. The author also provides recommendations for promoting collaboration in online teacher education courses.
Differentiating Instruction for Adult Learners in an Online Environment
Authors: Massey Dixie
Published: June 2012

Teacher education courses offered online are becoming increasingly common. Unfortunately, few instructors of online teacher education courses have specific preparation for teaching adult learners or in teaching online courses, resulting in faltering attempts to transfer traditional methodology such as lectures to online platforms. This chapter considers the background of distance education and examines relevant literature on adult learners. Differentiated instruction is proffered as a means of meeting the needs of adult learners in online teacher education courses. Specific examples of differentiating content, process, and product are suggested.
Puttering, Tinkering, Building, and Making
Authors: Feinberg Joseph R. , Schewe Audrey H. , Moore Christopher D. , Wood Kevin R.
Published: June 2012

Instructional simulation games are models of the real world that allow students to interact with events and objects that are normally inaccessible within a classroom setting. Yet, simply using an instructional simulation ignores powerful learning opportunities. Papert advocates going beyond simply using models. He promotes a fundamental change in how children learn through his theory of constructionism. Instead of constructivism with a “v,” Papert advocates a theory of learning called constructionism with an “n.” Constructionism aligns with constructivist theory with learners actively constructing knowledge from their experiences. But constructionism adds that new ideas are more likely to emerge when learners are actively engaged in designing or building an artifact or physical model that can be reflected upon and shared with others. Papert’s theoretical approach to learning is relevant to teacher education and should be applied to instruction via interactive, multimedia, and computer-aided simulations.
Upload, Download, Overload!
Authors: Kushnir Lena Paulo , Berry Kenneth
Published: June 2012

Students often complain of overload in online learning environments. Discussions here consider online design and organization factors that might contribute to students’ reports of overload. This study explored predictions that 1) students’ past online experience, 2) the organization of online environments and relevance of online material with which students work, and 3) the level of task difficulty impact (a) student learning outcomes, (b) students’ reports of overload, and (c) students’ perceptions of having enough time to complete assigned course work. A total of 346 participants were tested in two experiments that manipulated the organization of the online environment and the material that students had to learn. Experiment 1 tested how the organization of the online environment impacted learning outcomes. Findings suggested that online environments that are overly busy and that contain irrelevant information (i.e., stimulus-rich or “stimulus-noisy” online environments) had a negative impact on experienced, savvy online learners, but no impact on students less experienced with online learning environments. Surprisingly, results here suggest that overload affected only experienced students. Experiment 2 tested how the organization of the online material (that students had to learn) impacted learning outcomes. Findings suggested that online learning environments that used hypertext to organize material had a negative impact on student learning outcomes, misconceptions of information, and perceived overload. This chapter examines literature that considers design and organization factors that can impact online learning, and considers design strategies for online teaching environments and strategies for avoiding factors that can leave students feeling overloaded.
Designing for Reflection
Authors: Kharrufa Ahmed , Leat David , Olivier Patrick
Published: June 2012

In this case study, the authors revisit the benefits of reflection for learning and classify three different types of reflection support as evident in the pedagogy literature: post-activity, inter-activity and part-of-activity. They present their design of a collaborative learning application (Digital Mysteries) as implemented on the emerging digital tabletop technology. The design of Digital Mysteries aims at demonstrating the potential of technology for providing support for all the identified types of reflection. The application was evaluated through 12 trials with 6 groups of students 11-14 years old in a school environment. Two of the six groups carried out repeated trials with the goal of evaluating benefits from repeated use and to overcome effects resulting from the novelty of the technology. The trials showed clear evidence of reflective interactions, caused by the application’s design, which positively affected subsequent trials. The authors conclude with a number of generalized recommendations for designers of collaborative learning environments.
Cross-Cultural Wiki Collaboration in Teacher Education
Authors: Chen Xiaojun , Newby Timothy
Published: June 2012

The authors of this chapter share a technology integration project, “International Network of Students Investigating Technology in Education” (INSITE), that was conducted at Purdue University. The project demonstrated how pre-service teachers in America were taught and prepared in terms of technology integration. More than 1500 pre-service teachers in the College of Education at Purdue University and 500 International Partner (IP) participants have been involved in INSITE since September of 2008. In this chapter, the authors share a case of four cross-cultural student teams that participated in INSITE in September 2010. The authors discuss the process and implications of communication and coordination within the international collaboration teams.
Peer Feedback for Enhancing Students’ Project Development in Online Learning
Authors: Kumar Swapna , Kenney Johanna , Buraphadeja Vasa
Published: June 2012

The use of peer feedback is a strategy for online educators to facilitate collaboration among students and increase critical reflection. Through the well-designed use of peer feedback, students can, with help from other students, master concepts and ideas that they cannot understand on their own (Lu & Bol, 2007; Vygotsky, 1978). The process of giving and receiving peer feedback closely resembles professional practice (van den Berg, Admiraal, & Pilot, 2006; van der Pol, van den Berg, Admiraal, & Simons, 2008) and helps students develop life-long skills. This case study describes the use of peer feedback in an online graduate practicum course to support students and increase their exposure to different educational environments. It includes suggestions for effectively using peer feedback in online courses.
Consumers’ Adoption of Mobile Coupons in Malaysia
Authors: Jayasingh Sudarsan , Eze Uchenna Cyril
Published: June 2012

A mobile coupon is a new form of sales promotion tool used by marketers to advertise their products or services. This chapter examines key factors in consumers’ intention to use mobile coupons (m-coupon). The authors considered several factors and developed the conceptual framework underpinned on an extended Technology Adoption Model (TAM). The data analysis was based on 781 valid responses from four locations in Malaysia. The results indicate that perceived usefulness, attitude, and social factors influence the behavioral intention of consumers to use mobile coupons. Consistent with prior studies, perceived usefulness, and perceived ease of use were found to be significant antecedents of the attitude towards using m-coupons. The results also indicate that gender, income, and price consciousness are significant moderating variables.
Mobile Communication
Authors: Hesapci-Sanaktekin Ozlem , Somer Irem
Published: June 2012

With the improvements in communication technologies and the increased need for mobile communication among users, the mobile communication industry has been faced with fast-paced developments in the last few decades. The developments in mobile communication technologies provide opportunities that cannot be provided by traditional communication tools. Mobile applications are considered examples of such opportunities. The services offered by mobile phone technologies are diversified by the mobile applications that can be downloaded through digital platforms, and with these applications smart-phone users become even more active users. The current chapter reports findings from a study that employed a structured online questionnaire with 271 smart-phone users. The findings revealed that mobile application use, either free or paid, is explained by the period of smart-phone use, attitudes toward mobile applications, financial cost, and opinion leadership. Furthermore, free applications are more frequently used when the innovativeness increases and the perceived application cost decreases. The results present important outcomes for mobile companies, the digital platform providers, as well as mobile application producers.
Towards a Model of Employee Weblog Usage
Authors: Raeth Philip , Smolnik Stefan
Published: June 2012

The recent rise of Web 2.0 ideas, principles, and applications has significantly affected the communication and interaction in social networks. While Web 2.0’s Internet usage and benefits have been investigated, certain questions are still unanswered: whether benefits such as enhanced collaboration and knowledge sharing also apply in an organizational context and whether there are more, still uncovered, benefits. Since research on the corporate adoption and use of Web 2.0 technologies is still in its early stages, neither qualitative nor quantitative models that could provide answers have been proposed. As a starting point for further developing this research stream, the authors collected and reviewed the literature on internal corporate blogging. Then the framework by Ives et al. (1980) was chosen to categorize the identified 25 articles for further analysis. The paper describes building a conceptual model and identifying the antecedents and consequences of employee weblog usage within corporations. The findings of the review suggest that employee blogging in corporations is a social and an organizational phenomenon. Individual perceptions and attitudes, peers, and cultures have a crucial influence on weblog usage, while the organization and its culture provide a framework.
Playing Virtual Power Games
Authors: Janneck Monique , Staar Henning
Published: June 2012

Although virtual organizations and networks have been studied, there is still need for research regarding their inner dynamics and the mechanisms of leadership and governance. This paper investigates micro-political processes i.e. informal actions of individual actors to gain power and exert influence, which is a well-researched concept in traditional organizations with respect to inter-organizational networks. This study investigates structures and strategies of power within virtual networks. Results show that micro-political tactics known from research in traditional organizations are used in inter-organizational settings. Additional micro-political tactics, specific to virtual networks, are identified. The latter are related to the use of information and communication technology (ICT). A second quantitative study surveyed 359 members of inter-organizational networks on their use of micro-political tactics. Results confirm that micro-political strategies are widely used in virtual networks. The degree of virtuality was associated with the use of certain tactics. Possible implications for the structure and governance of virtual networks and the design of the technology that is used to support virtual cooperation are discussed.
Low-Cycle Fatigue Behavior of Permanent-Mold Cast and Die-Cast Al-Si-Cu-Mg-Sc Aluminum Alloys
Authors: Che Xin , Li Feng , Chen Li Jia
Published: June 2012

The low-cycle fatigue behaviors of permanent-mold cast and die-cast Al-Si-Cu-Mg-Sc alloys at room temperature were investigated. The results show that at the higher total strain amplitudes, both permanent-mould cast and die-cast Al-Si-Cu-Mg-Sc alloys exhibit the cyclic strain hardening. However, at the lowest total strain amplitude, the cyclic strain hardening occurs in the initial and middle stages of fatigue deformation and the stable cyclic stress response is noted in the later stage of fatigue deformation for the permanent-mould cast alloy, while the cyclic strain hardening phenomenon is observed during whole fatigue deformation for the die-cast alloy. At the same total strain amplitude, the die-cast alloy shows the higher cyclic deformation resistance than the permanent-mold cast alloy. Compared with the permanent-mold cast alloy, the die-cast alloy possesses the longer fatigue life at the lower total strain amplitudes. The relationship between both elastic and plastic strain amplitudes with reversals to failure shows a monotonic linear behavior for both permanent-mold cast and die-cast Al-Si-Cu-Mg-Sc alloys
Magnetic Property Study on Multi-Metal Compounds [MA(en)x]y[Fe(CN)6]z·nH2O(MA=Co2+,Gu2+)
Authors: Lin Qing , He Yun , Xu Jian Mei , Huang Hai Fu , Wang Rui Jun
Published: June 2012

The cyano-bridged complexes [MA(en)x]y[Fe(CN)6]z·nH2O(MA=Co2+、Gu2+) have been synthesized. In the multi-metal compound [Co(en)3] [Fe(CN)6] ·6.1H2O was prepared. Infrared spectra with stretching vibration CN = 2117.27 cm-1 illustrates that there exists the bridged cyanide on the compound; the Curie temperature Ө is -8.23117 K, indicating the magnetic interaction between the metal ions in the compound is very weak.In the multi-metal compound CuII3[FeIII(CN)6]2·3NH3·6H2O, we shows firstly the coexistence of ferromagnetic order and spin-glass order.The irreversibility in the MFC/MZFC and the relaxation of MZFC suggest that the magnetic system can be visualized as containing a ferromagnetic cluster of spin below Tc, mixed with small spin-glass clusters formed below temperature Tg less than Tc. The observed magnetic properties are explained with a ferromagnetic-spin-glass phase model.
Mineralizer Mediated Self-Assembly of PbTiO3 Crystals
Authors: Lin Hai Yan , Wang Yong Gang , Zhang Zhan Ying , Zhang Wei Jun , Wang Yu Jiang
Published: June 2012

PbTiO3 crystals with different morphologies, such as flower-like and spherical shape, which was constructed by oriented nanoparticles have been obtained by a simple surfactant-free hydrothermal process assisted by K2CO3 as a mineralizer. Powder X-ray diffraction (XRD) analysis was applied to examine the purity and crystallinity of the as-prepared samples. The morphologies have been characterized by scanning electron microscopy (SEM). The results indicated that the self-assembly structures of PbTiO3 crystals were dependent on the addition amount of K2CO3 and the formation mechanism of the products was briefly discussed.
Parameters Optimization of Rotary Ultrasonic Machining of Zirconia Ceramic for Surface Roughness Using Statistical Taguchi’s Experimental Design
Authors: Abdo Basem M.A. , Darwish S.M. , El-Tamimi A.M.
Published: June 2012

Taguchi optimization methodology is used to optimize Rotary Ultrasonic Machining (RUM) parameters for the milling of zirconia ceramic. The influence of the RUM parameters such as vibration frequency, vibration amplitude, spindle speed, feed rate, and depth of cut on the surface roughness is studied. A three-level orthogonal array table is used to determine the signal-to-noise (S/N) ratios based on Taguchi’s design of experiments. Furthermore, analysis of variance (ANOVA) has been performed to study the relative significance of the different factors on the surface roughness of zirconia ceramic. Finally, verification tests were carried out to compare the predicted values of the surface roughness with their experimental values in order to confirm the effectiveness of the Taguchi Optimization.
Preparation and Characterization of Protein-Montmorillonite Composites
Authors: Zhu Qian , Chen Dai Mei , Liu Yan , Deng Xu Tao , Li Hui , Lu Zhi Jin
Published: June 2012

Protein-montmorillonite composites were prepared by direct and stepwise intercalation of lysozyme(LYZ) into gallery of montmorillonite(MMT), and characterized by X-ray Diffraction (XRD), Thermal Gravimetric Analysis(TGA) and Atomic Force Microscopy(AFM). The direct intercalation experiment showed that with the increase of LYZ/MMT weight ratio from 1:1 to 4:1, the interlayer space of MMT increased from 4.2nm to 6.3nm, and the adsorption amount of lysozyme onto MMT increased from 1.05mg/mg to 1.84mg/mg. While in stepwise intercalation process, the adsorption of LYZ was obviously lower than that in direct intercalation experiment, indicating that the exchange reaction between lysozyme and POP-D2000 was incomplete in the stepwise intercalation reaction.
Study on Framework of Environment Adaptive Agent Based Materiel System Reliability Simulation Modeling
Authors: Shen Ying , Cao Jun Hai , Wu Wei , Ni Ming Fang
Published: June 2012

In the paper, it puts forward Framework of Environment adaptive Agent Based Materiel System Reliability Simulation Modeling, called as FARSiM, and dwells on the technology details from Conceptual Model, Agent Relationship Model and Message Transfer Model.The framework provides a current technology concept for adaptive Agent Based Materiel System Reliability Simulation, with better universality and maneuverability.
The Study on the Microstructure and Electrical Property of Boron and Sulfur Co-Doped Diamond Films by Chemical Vapor Deposition
Authors: Li Rong Bin , Wang Xiang Hu , Zhang Jing
Published: June 2012

The atomic-scale microstructure and electron emission properties of boron and sulfur (denoted as B-S) codoped diamond films grown on high-temperature and high-pressure (HTHP) diamond and Si substrates were investigated using atom force microscopy (AFM), scanning tunneling microscopy (STM) and current imaging tunneling spectroscopy (CITS) measurement techniques. The films grown on Si consisted of large grains with secondary nucleation, whereas those on HTHP diamond are composed of well-developed polycrystalline facets with an average size of 10–50 nm. Large tunneling currents were observed at some grain boundaries, and the emission character is better at the grain boundaries than at the center of the crystal. The codoped films grown on HTHP diamond have an almost uniform electron emission efficiency at grain boundaries or crystalline facets, which indicates that the doped atoms are uniformly distributed in the films. The local I-V characteristics for films deposited on Si or HTHP diamond substrates indicate n-type conduction.
The Application of Microwave Technology in the Anti-Felting Finishing Process
Authors: Zhao Shu , Ding Yong Qing , Yu Qi Chi
Published: June 2012

In order to get a kind of environmentally anti-felting finishing process for woolen knitted knitted fabric,the method of microwave / hydrogen peroxide pretreatment is applied and the effect of chitosan anti-felting finishing process is studied in this paper. The results show that the application of microwave technology can greatly reduce the time of pretreatment and increase the efficiency of pretreatment; the anti-felting process of hydrogen peroxide/microwave pretreatment combined with chitosan finishing for the woolen knitted fabric is effective, environmentally friendly.
Unphysical Heat Transfer by Molecular Dynamics
Authors: Prevenslik Thomas
Published: June 2012

Molecular Dynamics (MD) simulations based on classical statistical mechanics allow the atom to have thermal heat capacity. Quantum mechanics (QM) differs in that the heat capacity of atoms in submicron nanostructures vanishes. Nevertheless, MD simulations of heat transfer in discrete nanostructures are routlinely performed and abound in the literature. Not only are discrete MD sumultions invalid by QM, but give unphysical results, e.g., thermal conducitvity in nanofluids is found to exceed standard mixing rules while in solid metal films depends on thickness. QM explains the unphysical results by negating the heat capacity of atoms in discrete nanostructures, thereby precluding the usual conservation of absorbed electromagnetic (EM) energy by an increase in temperature. Instead, the absorbed EM energy is conserved by QED inducing the creation of non-thermal EM radiation inside the nanostructure that by the photoelectric effect creates charge in the nanostructure, or is emitted to the surroundings. QED stands for quantum electrodynamics. Unphysical results occur because the QED induced radiation is not included in the nanoscale heat balance, but if included the physical results for discrete nanostructures are found. Examples of unphysical MD simulatons are presented.
Design and Preliminary Test of Tiny Remote Controlled Electric Tractor Used in Greenhouse
Authors: Yang Fu Zeng , Lu Yi , Liu Yong Cheng , Lan Yu Bin , Liu De Bo , Wang Zheng
Published: June 2012

Most agricultural machines cultivating in greenhouse use diesel engine or gasoline engine as the prime mover, they can make pollutions to crops and their growing environment easily with the emissions, lead, dust and other harmful substances at work, at the same time, most of them exit the problems of inconvenient to operate, labor intensity and big noise etc. To solve these problems, a kind of new miniature remote controlled led electric tractor was proposed in this paper, which is suitable for the plow work in greenhouse. Besides, this paper also researched into the spatial layout of this machine and built the 3-D model, the main parts of this machine’s electric driving system and the calculation of their parameters were finished. Based on these, a prototype was made, and preliminary road and field tests were did. The results showed that the prototype can complete normal remote plow work, simultaneously with the advantages of low carbon environmental protection, low operating costs, easy operation and low noise.
The Application of Integrated Technique on the Control and Display Parts of Spacecraft
Authors: Ding Cheng Bin , Ning Yin
Published: June 2012

This paper introduced actuality and developing direction of manufacture technology in spacecraft base on the application of CAD/CAM integrated technique, described the integrated designing process according to the requirements that the control and display parts of spacecraft must meet the conditions of the resistance to mechanical environment, thermal, EMC, anti-radiation and process feasibility, presented the applied method on integrated technique based on Pro/E, and induced the working flow of CAD/CAM integrated technique in the control and display parts of spacecraft. This paper is helpful in pushing further study on the application of integrated technique in the control and display parts of spacecraft.
On-Line Fuzzy Monitoring of Micro-Hole Drilling Based on Genetic Algorithm
Authors: Zheng Hui Meng , Chen Jian Qing , Zhu Shou Xin
Published: June 2012

In automated micro-hole drilling system, in order to improve the drilling performance and reduce of production costs by maximizing the use of drill life and preventing drill failures, the drill bit wear state monitoring is more important. However, drill bit wear is difficult to measure in drilling process. By observation, wear failure of the drill bit could cause related changes of the spindle current signal, so construct fuzzy control mathematical models with the relationship between drill bit wear and spindle current, genetic algorithm and fuzzy control theory are applied to micro-drilling system in this paper .The membership functions of fuzzy control model are optimized by genetic algorithms. Through calculation, we can get drill bit wear value which used as monitoring threshold value in micro-hole drilling on-line monitoring system to avoid the drill breakage and improve the monitoring reliability.
Inverse System Decoupling Control Research of Magnetic Levitation Spherical Reluctance Driving Joint
Authors: Zeng Li , Chen Fang , Zhang Fan
Published: June 2012

This paper presents a new magnetic levitation spherical reluctance driving joint. It analyses the theory of air-gap magnetic of the driving joint and the mechanism of the generation of the magnetic levitation force and electromagnetic torque which based on the principle of reluctance motor. The mathematical model and the inverse system decoupling model of the driving joint have been established. The decoupling linearization and the state feedback closed-loop control system have been achieved in this paper also. The research of the result of system simulation provides us the decoupling characteristic and the dynamic characteristic of the driving joint system.
Drivability and Fuel Economy Evaluation of a Sport Utility Vehicle Using CAE Tool
Authors: Wang Wen Lin
Published: June 2012

To establish accurate models for powertrain optimization of a Chinese sport utility vehicle Landwind X8, a powerful CAE tool GT-Drive was used to evaluate the vehicle drivability and fuel economy. Various proper models were established and vehicle performance was simulated, obtained results show that drivability of the vehicle is satisfactory in a macro sense, but fuel economy is moderate. Further comparison of simulated performance indices with field test data demonstrates that nearly 80% of the absolute relative errors are below 5%, the maximum absolute relative error is also less than 10%. Thus, the simulated data met well with the test data, it is confirmed that the established simulation models are validated and can be used as effective analysis tools in further powertrain optimization.
Kinematics Analysis on Humanoid Flexible Robot Hand
Authors: Liu Xiao Min , Wang Yi Qiang , Geng De Xu , Zhang Jin Tao , Wu Guang Bin
Published: June 2012

A humanoid flexible robot hand is introduced base on the single bending joint and bi-directional bending flexible joint we previously developed. The robot hand has human palm shape, and all the fingers have the same structure based on the modular design, which improve the versatility and interchangeability greatly. The position and posture of the fingers are acquired by means of homogeneous transformation matrix with parameter. The study in this paper lays the foundation for further research.
Finite Element Analysis of Metallic Structure of Unconventional Dedicated Tower Crane
Authors: Yuan Si Cong , Shang Jing Qiang , Wang Dong Hong , Wei Dong Dong , Xiao Chang
Published: June 2012

For the high hoisting height, wide using range, tower crane is widely utilized in the architecture construction, while there are some deficiencies in the high rising architecture such as chimney, so the performance can’t exerted. By virtue of computer aided technology, the finite element static analysis of metallic structure of unconventional dedicated tower crane is conducted in this paper, and the figures of stress and displacement are achieved for the two working conditions and two structures. It is proved that the results are satisfied the requirements of stiffness and strength, and also foundation is established for the further analysis.
Grab Bucket Optimization Design Based on the Kinematics and Dynamics Analysis
Authors: Gu Li Zhi , Xiang Tie Ming
Published: June 2012

Grab bucket is one of the most important assemblies of the grab dredges whose performance largely relies upon the construction of the bucket. Dynamics is carried out stressing on the two critical points, commencing status and terminating situation, for the greatest grabbing and cutting force; and so is done on kinematics concentrating the three representative points, A, B, and C, with position, velocity, and acceleration, respectively, with which almost all of the points on the bucket may be obtained for the three kinematic parameters. Optimal desgin have been done with objective of the proper momentum and thrust force and constraint of weight, width, ratio of weight and capacity, quotiety of the rope, ascent and descent velocity of the bucket.