bluuebunny/crossref_metadata_2025_split huggingface dataset:
Contingent reward leader behaviour: Where does it come from?
Authors: Camps Joaquín , Torres Federico 
Published: November 2010

AbstractAs many academics have pointed out, while researchers have learned a great deal about the effects of contingent reward (CR) leader behaviour, relatively little is known about its genesis. CR transactional leadership is traditionally viewed as an independent variable which exerts influence downstream. However, if we are to understand how to influence, improve or modify these downstream effects, we need to shift our focus upstream towards the study of transactional leadership as a dependent variable. In line with this reasoning, we put forward the hypothesis that a contextual variable (organizational learning capability) and a subordinate's characteristic (employability) are antecedents of CR transactional leader behaviour. These original relationships will be empirically assessed, alongside the well documented relationship between CR leader behaviour and a worker's individual performance. Our hypothesis was tested on a sample of 795 professors from 70 university departments, using structural equation methodology. Copyright © 2010 John Wiley & Sons, Ltd.
Mono‐ and Binuclear Dimethylthallium(III) Complexes with o‐Benzoquinone‐TTF‐o‐Benzoquinone Ligand; Synthesis, Spectroscopy and X‐ray Study
Authors: Klementieva Svetlana V. , Kuropatov Vyacheslav A. , Fukin Georgii K. , Romanenko Galina V. , Bogomyakov Artem S. , Cherkasov Vladimir K. , Abakumov Gleb A. 
Published: November 2010

AbstractThe new mono‐ and binuclear semiquinonato dimethylthallium complexes (Q‐TTF‐SQ)TlMe2 (1) and Me2Tl(SQ‐TTF‐SQ)TlMe2 (2) based on di‐o‐quinone with tetrathiafulvalene (TTF) bridge, 4,4′,7,7′‐tetra‐tert‐butyl‐2,2′‐bis‐1,3‐benzodithiol‐5,5′,6,6′‐tetraone Q‐TTF‐Q, were synthesized by the reaction between corresponding mono‐ and di‐sodium semiquinonates (Q‐TTF‐SQ)Na and Na(SQ‐TTF‐SQ)Na and one or two equivalents of Me2TlCl, respectively. The same products could be obtained by the interaction of Q‐TTF‐Q with one or two equivalents of Me3Tl. Complexes 1 and 2 were characterized by IR and electronic absorption spectroscopy, EPR, and magnetic measurements. The molecular structures of 1 and 2 were determined by single‐crystal X‐ray diffraction. It was found that mono‐semiquinonato derivative 1 partially disproportionates into Q‐TTF‐Q and binuclear complex 2 in THF solution. According to variable temperature magnetic susceptibility measurements and EPR data, compound 1 reveals paramagnetic behavior with an S = 1/2 state in the range 50–300 K, whereas compound 2 has an S = 0 ground state as the consequence of antiferromagnetic coupling between semiquinonato moieties realized through the TTF‐bridge.
Using AOP to bring a project back in shape: The OurGrid case
Authors: Dantas Ayla , Cirne Walfredo , Saikoski Katia 
Published: November 2010

AbstractThe design and development of distributed software is a complex task. This was not different in OurGrid, a project whose objective was to develop a free-to-join grid. After two years of development, it was necessary to redesign OurGrid in order to cope with the integration problems that emerged. This paper reports our experience in using Aspect-Oriented Programming (AOP) in the process of redesigning the OurGrid middleware. The essential direction of our approach was to get the project (and the software) back in shape. We discuss how the lack of separation of concerns created difficulties in the project design and development and how AOP has been introduced to overcome these problems. In particular, we present the event-based pattern designed to better isolate the middleware concerns and the threads. Besides, we also present the aspects designed for managing the threads and for aiding the testing of multithreaded code. We also highlight the lessons learned in the process of regaining control of the software.
Computational aspects of the Helly property: a survey
Authors: Dourado Mitre C. , Protti Fábio , Szwarcfiter Jayme L. 
Published: November 2010

Abstract
In 1923, Eduard Helly published his celebrated theorem, which originated the well known Helly property. Say that a family of subsets has the Helly property when every subfamily of it, formed by pairwise intersecting subsets, contains a common element. There are many generalizations of this property which are relevant to some parts of mathematics and several applications in computer science. In this work, we survey computational aspects of the Helly property. The main focus is algorithmic. That is, we describe algorithms for solving different problems arising from the basic Helly property. We also discuss the complexity of these problems, some of them leading to NP-hardness results.
Ginga-J: The procedural middleware for the Brazilian digital TV system
Authors: Filho Guido Lemos de Souza , Leite Luiz Eduardo Cunha , Batista Carlos Eduardo Coelho Freire 
Published: November 2010

Abstract
The recent development of the research on digital terrestrial television in Brazil has led the country.s government to state a series of premises in which the government shows to care not only for technology improvement, but also to use this development as a tool for ameliorating the Brazilian social context, in what concerns digital inclusion. These premises and necessities have generated some peculiarities in the development process, which directly influenced in the functionalities granted by the Brazilian.s middleware choice. This paper, thus, seeks to explain all the architecture of the Java part — called Ginga-J — of the Ginga middleware, highlighting the new features, especially when confronting the Brazilian middleware with the other middlewares worldwide defined.
Return channel for the Brazilian digital television system-terrestrial
Authors: Meloni Luís Geraldo P. 
Published: November 2010

Abstract
Recently, it has been proposed the use of WiMAX for the return channel in digital television systems using a new frequency profile bellow 1 GHz, which has been calledWiMAX-700. The profile operates from 400 MHz to 960 MHz as primary band, which includes the UHF band, and optionally from 54 MHz to 400 MHz as secondary band. This work presents some aspects of the WiMAX-700 technology and some simulation results of models designed to determine the system capacity concerning the number of actives subscriber stations, according to specific proposed scenarios, traffic sources profiles, specifics propagation, and coverage conditions. The results presented in this work provide elements to determine the suitability of WiMAX-700 technology as the return channel for the interactive digital television applications.
Empirical research in CSCW — a review of the ACM/CSCW conferences from 1998 to 2004
Authors: Wainer Jacques , Barsottini Claudia 
Published: November 2010

AbstractThis paper reviews all the 169 full papers published in the ACM/CSCW conferences from 1998 to 2004. We classify the papers according to the type of empirical research they report. The classes are evaluation of groupware, description of work situations, hypothesis testing, bibliographic research, and papers with no empirical research. We show that the field is in constant change, that the proportions of papers in these different categories have been changing in these 6 years, and that for the evaluation papers, the results by Pinelle and Gutwin do not carry for the 1998–2004 period
Communication and leadership differences in virtual design teams: Why some teams do better than others
Authors: Fjermestad Jerry , Ocker Rosalie J. 
Published: November 2010

AbstractOrganizations in today’s global economy face continual pressures to remain responsive to changes in the competitive marketplace. One way that firms have adapted to these pressures is to use web-based communication technologies to support virtual project teams. To better understand the effectiveness of these dispersed teams, we have analyzed the transcripts of eight virtual design teams composed of graduate students in information systems. Using a coding scheme based on design rationale concepts, we compare and contrast the communication activities of high and low performing virtual teams working on the early stages of software design.Our results suggest that the high performing virtual teams significantly out-communicated the low performing virtual teams. High performing teams communicated more regarding design alternatives. They also spent considerably more effort summarizing their work and discussing the write-up of the final design deliverable. The leaders of high performance teams had more communication content than leaders of low performing teams.
A contextualised Learning Interaction Memory
Authors: Siebra Sandra A. , Salgado Ana Carolina , Tedesco Patrícia A. 
Published: November 2010

Abstract
The interaction is the key element used in Collaborative Learning Environments to understand the process of knowledge building and the role played by each student in it. Interaction analysis can provide support for the students’ reflection and self-regulation processes as well as for the teachers’ activities. But to perform the analysis process, it is important to discover and register the context where each interaction has occurred, in order to understand the meaning of user interactions. However, although there are several approaches for Interaction Analysis in Computer-Supported Collaborative Learning, there is a lack of methods and tools that consider: (1) the context where the interactions have occurred; (2) the different needs of feedback from the point of view of teacher and students; and (3) the necessity of contextualized historical information to produce more complete and semantically rich reports for students and teachers. In this light, this paper presents a Learning Interaction Memory (LIM), used to store the learning interactions occurred in Computer-Supported Collaborative Learning Environments, taking into account the context where they have occurred. The LIM was modelled in a multidimensional structure so that interactions can be viewed from different perspectives and can be presented selectively, according to users’ needs. This paper also presents the process of construction and exploration of the LIM and a Context-Based Analytical Environment called SmartChat+: an environment for collaborative discussions of specific subjects that uses the LIM. In order to show the feasibility of the LIM, a series of exploratory studies was carried out, yielding good initial results, especially in what concerns feedback from the users.
Attack induced cascading breakdown in complex networks
Authors: Zhao Liang , Park Kwangho , Lai Ying-Cheng , Cupertino Thiago Henrique 
Published: November 2010

AbstractThe possibility that a complex network can be brought down by attack on a single or very few nodes through the process of cascading failures is of significant concern. In this paper, we investigate cascading failures in complex networks and uncover a phase-transition phenomenon in terms of the key parameter characterizing the node capacity. For parameter value below the phase-transition point, cascading failures can cause the network to disintegrate almost entirely. Then we show how to design networks of finite capacity that are safe against cascading breakdown. Our theory yields estimates for the maximally achievable network integrity via controlled removal of a small set of low-degree nodes.
Fast two-step segmentation of natural color scenes using hierarchical region-growing and a Color-Gradient Network
Authors: von Wangenheim Aldo , Bertoldi Rafael F. , Abdala Daniel D. , Richter Michael M. , Priese Lutz , Schmitt Frank 
Published: November 2010

AbstractWe present evaluation results with focus on combined image and efficiency performance of the Gradient Network Method to segment color images, especially images showing outdoor scenes. A brief review of the techniques, Gradient Network Method and Color Structure Code, is also presented. Different region-growing segmentation results are compared against ground truth images using segmentation evaluation indices Rand and Bipartite Graph Matching. These results are also confronted with other well established segmentation methods (EDISON and JSEG). Our preliminary results show reasonable performance in comparison to several state-of-art segmentation techniques, while also showing very promising results comparatively in the terms of efficiency, indicating the applicability of our solution to real time problems.
A standards-based framework to foster geospatial data and process interoperability
Authors: Pastorello Gilberto Zonta , Senra Rodrigo Dias Arruda , Medeiros Claudia Bauzer 
Published: November 2010

AbstractThe quest for interoperability is one of the main driving forces behind international organizations such as OGC and W3C. In parallel, a trend in systems design and development is to break down GIS functionalities into modules that can be composed in an ad hoc manner. This component-driven approach increases flexibility and extensibility. For scientists whose research involves geospatial analysis, however, such initiatives mean more than interoperability and flexibility. These efforts are progressively shielding these users from having to deal with problems such as data representation formats, communication protocols or pre-processing algorithms. Once scientists are allowed to abstract from lower level concerns, they can shift their focus to the design and implementation of the computational models they are interested in. This paper analyzes how interoperability and componentization efforts have this underestimated impact on the design and development perspective. This discussion is illustrated by the description of the design and implementation of WebMAPS, a geospatial information system to support agricultural planning and monitoring. By taking advantage of new results in the above areas, the experience with WebMAPS presents a road map to leverage system design and development by the seamless composition of distributed data sources and processing solutions.
Priapisme aigu drépanocytaire: analyse de 20 cas traités au CHU de Brazzaville
Authors: Bouya P.A. , Odzébé A.W.S , Koumou Moritoua R.D. , Elira Dokékias A. 
Published: November 2010

Résumé

Objectif
Évaluer les résultats des traitements médicaux et chirurgicaux du priapisme drépanocytaire.

Malades et méthodes
Vingt malades ont été traités pour priapisme drépanocytaire dans les services d’urologie—andrologie et d’hématologie du CHU de Brazzaville, du 1er janvier 1995 au 31 décembre 2005. Les méthodes thérapeutiques ont été les injections intracaverneuses d’étiléfrine et les fistules cavernospongieuses.

Résultats
1) Cinq patients traités sans succès par transfusion et étiléfrine orale ont été secondairement traités avec succès par la technique deWinter; 2) sur cinq patients traités par injection intracaverneuse d’étiléfrine en première intention, on note trois succès et deux échecs, traités avec succès par la technique de Winter; 3) sur dix patients traités par fistules cavernospongieuses selon Winter en première intention, trois ont récidivé et ont été secondairement traités avec succès par la méthode d’Al-Ghorab. Les résultats fonctionnels à long terme sont: 25 % d’absence d’érection, 25 % d’insuffisance d’érection et 50 % d’érection normale.

Conclusion
Le traitement par injection intracaverneuse d’étiléfrine est efficace avant la 24e heure. Au-delà, les fistules cavernospongieuses donnent les meilleurs résultats.
Validation of the Peritraumatic Dissociative Experiences Questionnaire and Peritraumatic Distress Inventory in school-aged Victims of Road Traffic Accidents
Authors: Bui E. , Brunet A. , Olliac B. , Very E. , Allenou C. , Raynaud J.-P. , Claudet I. , Bourdet-Loubère S. , Grandjean H. , Schmitt L. , Birmes P. 
Published: November 2010

AbstractBackgroundAlthough the reliable and valid Peritraumatic Distress Inventory (PDI–C) and Peritraumatic Dissociative Experiences Questionnaire (PDEQ) are useful for identifying adults at risk of developing acute and chronic posttraumatic stress disorder (PTSD), they have not been validated in school-aged children and their predictive values remain unknown in this population. This study aims to assess the psychometric properties of the children versions of these two measures (PDI-C and PDEQ-C) in a sample of French-speaking school-children.MethodsOne-hundred and thirty-three consecutive victims of road traffic accidents, aged 8–15 years, were recruited into this longitudinal study via the emergency room. The peritraumatic reactions were assessed at baseline and PTSD symptoms were assessed 1 month later.ResultsCronbach's alpha coefficients were 0.8 and 0.77 for the PDI-C and PDEQ-C, respectively. The 1-month test-retest correlation coefficient (n= 33) was 0.77 for both measures. The PDI-C demonstrated a two-factor structure while the PDEQ-C displayed a one-factor structure. As with adults, the two measures were intercorrelated (r= 0.52) and correlated with subsequent PTSD symptoms and diagnosis (r= 0.21–0.56;P< 0.05).ConclusionsThe children versions of the PDI and PDEQ are reliable and valid in children.
AVOIDANCE FOR FUNDAMENTAL BREACH OF CONTRACT UNDER THE UN CONVENTION ON THE INTERNATIONAL SALE OF GOODS
Authors: Bridge Michael 
Published: November 2010

AbstractThis article deals with the avoidance of contracts for non-performance under the United Nations Convention on the International Sale of Goods 1980, which has been adopted by more than 70 States, though not yet by the United Kingdom. It critically analyzes the text of the Convention, and measures the contributions of national courts for fidelity to the text of the Convention and compatibility with the purposes served by that text.
THE INTERNATIONAL COURT OF JUSTICE AND CRIMINAL JUSTICE
Authors: Keith KJ 
Published: November 2010

AbstractDespite appearances to the contrary, the International Court of Justice can and does have much to say on matters of criminal justice. This article considers four areas in which such matters arise before the Court: jurisdiction over criminal offences allegedly committed abroad and immunity from that jurisdiction; principles of individual criminal liability and the potential for concurrent State responsibility; issues of evidence and proof; and the Court's review of the exercise of those domestic criminal powers which are subject to international regulation. In the process of addressing these issues, the ICJ has contributed to the development of fundamental principles of criminal law, while drawing on the experience of domestic courts.
Day-time sleep and active ageing in later life
Authors: VENN SUSAN , ARBER SARA 
Published: November 2010

ABSTRACTThe concept of ‘active ageing’ has received much attention through strategic policy frameworks such as that initiated by the World Health Organisation, and through government and non-governmental organisation initiatives. The primary goal of these initiatives is to encourage older people to be active and productive, and to enhance quality of life, health and wellbeing. It is well known that with increasing age, night-time sleep deteriorates, which has implications for how older people maintain activity levels, and leads to an increased propensity for day-time sleep. Using data from 62 interviews with people aged 65–95 years living in their own homes who reported poor sleep, this paper explores the meanings of day-time sleep, and how the attitudes and practices of ‘active ageing’ are intricately linked to the management of day-time sleep and bodily changes that arise from the ageing process. The desire to be active in later life led to primarily dichotomous attitudes to day-time sleep; older people either chose to accept sleeping in the day, or resisted it. Those who accepted day-time sleep did so because of recognition of decreasing energy in later life, and an acknowledgement that napping is beneficial in helping to maintain active lives. Those who resisted day-time sleep did so because time spent napping was regarded as being both unproductive and as a negative marker of the ageing process.
Head and neck cancer metastasis to the percutaneous endoscopic gastrostomy (PEG) tube site: a report of two cases
Authors: Johnson Matthew , Turaka Aruna , Feigenberg Steven J. 
Published: November 2010

AbstractObjective: Percutaneous endoscopic gastrostomy (PEG) tube insertion is used as an alternative to surgical gastrostomy in patients with head and neck cancers for nutritional support.Methods: We report two cases of head and neck cancer with metastasis to the surgical PEG tube site. The clinical and treatment-related details are discussed.Conclusions: Metastasis to PEG tube site is a rare occurrence.
Hepatic stellate cell (vitamin A‐storing cell) and its relative – past, present and future
Authors: Senoo Haruki , Yoshikawa Kiwamu , Morii Mayako , Miura Mitsutaka , Imai Katsuyuki , Mezaki Yoshihiro 
Published: November 2010

AbstractHSCs (hepatic stellate cells) (also called vitamin A‐storing cells, lipocytes, interstitial cells, fat‐storing cells or Ito cells) exist in the space between parenchymal cells and liver sinusoidal endothelial cells of the hepatic lobule and store 50–80% of vitamin A in the whole body as retinyl palmitate in lipid droplets in the cytoplasm. In physiological conditions, these cells play pivotal roles in the regulation of vitamin A homoeostasis. In pathological conditions, such as hepatic fibrosis or liver cirrhosis, HSCs lose vitamin A and synthesize a large amount of extracellular matrix components including collagen, proteoglycan, glycosaminoglycan and adhesive glycoproteins. Morphology of these cells also changes from the star‐shaped SCs (stellate cells) to that of fibroblasts or myofibroblasts. The hepatic SCs are now considered to be targets of therapy of hepatic fibrosis or liver cirrhosis. HSCs are activated by adhering to the parenchymal cells and lose stored vitamin A during hepatic regeneration. Vitamin A‐storing cells exist in extrahepatic organs such as the pancreas, lungs, kidneys and intestines. Vitamin A‐storing cells in the liver and extrahepatic organs form a cellular system. The research of the vitamin A‐storing cells has developed and expanded vigorously. The past, present and future of the research of the vitamin A‐storing cells (SCs) will be summarized and discussed in this review.
Centriole duplication: analogue control in a digital age
Authors: Sluder Greenfield , Khodjakov Alexey 
Published: November 2010

AbstractIn preparation for mitosis, the centrosome doubles once and only once to provide the two poles of the mitotic spindle. The presence of more than two centrosomes increases the chances that mitosis will be multipolar, and chromosomes will be distributed unequally. Since the number of mother—daughter centriole pairs determines the number of centrosomes, it is important that only one daughter centriole is assembled at, but slightly separated from, the proximal end of each mother centriole. This numerical and spatial specificity has led to the belief that a ‘template’ on the mother centriole provides a unique site for procentriole assembly. We review observations that are leading to the demise of this intuitively attractive idea. In its place, we are left with the notion that pericentriolar material at the wall of the mother centriole provides a local environment that promotes the assembly of a macromolecular complex that seeds the daughter centriole. Even though the system normally behaves in a digital fashion to go from zero to just one daughter centriole per mother, this behaviour appears to be based in the precise analogue control of multiple proteins, their activities, and the structure provided by the mother centriole.