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Study of the behavior of poly(vinyl chloride) and functionalized polyethylene blends
González,Jeanette; Rosales,Carmen; Hernández,Marianella; Ichazo,Miren;
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia , 2007,
Abstract: in this research, blends of commercial poly(vinyl chloride) with linear low density polyethylenes (lldpe) and high density polyethylenes (hdpe) pure and functionalized were evaluated. different proportions of initiator (dicumyl peroxide-dcp) and 10 phr of a functionalizing agent (diethyl maleate-dem) were used in order to accomplish the functionalization of polyethylenes. the compounds were prepared in a twin screw extruder with a pvc/pe blend ratio of 65/35. the functionalization degree was determined by infrared spectroscopy (ftir). blends were characterized by differential scanning calorimetry (dsc) and by mechanical testing (tensile and impact strength); the morphology of the blends was also determined by scanning electron microscopy (sem). results obtained indicate that the functionalization of polyethylenes improves the processability of their blends with pvc. for the blends of pvc with lower k value and grafted lldpe with lower molecular weigth, not variation on the impact strength was obtained; samples more translucent were observed, as well as a reduction in the size of the structures in the disperse phase seen on the micrographs. this result seems to be closely related to the viscosity ratio of the components of these blends. concerning tensile properties a reduction in young?s modulus, tensile strength and elongation at break was found for all blends studied.
Estudio del comportamiento de mezclas de policloruro de vinilo con polietilenos funcionalizados Study of the behavior of poly(vinyl chloride) and functionalized polyethylene blends
Jeanette González,Carmen Rosales,Marianella Hernández,Miren Ichazo
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia , 2007,
Abstract: En esta investigación se realizaron mezclas de dos tipos comerciales de policloruro de vinilo con polietilenos lineales de baja densidad (PELBD) y polietilenos de alta densidad (PEAD) puros y funcionalizados. Para la funcionalización de los polietilenos se emplearon diferentes proporciones de iniciador (dicumilperóxido) y 10 ppc de agente funcionalizante (dietilmaleato). Las mezclas fueron preparadas en una extrusora de doble tornillo en una proporción PVC/PE de 65/35. El grado de funcionalización de los polietilenos fue determinado por espectroscopia infrarroja por transformada de Fourier (FTIR). Las mezclas fueron caracterizadas mediante calorimetría diferencial de barrido (DSC) y propiedades mecánicas de tracción e impacto y su morfología fue determinada mediante microscopía electrónica de barrido (MEB). La funcionalización de los polietilenos mejoró la procesabilidad de las mezclas de éstos con el PVC. En las mezclas preparadas con el PVC de menor valor K y con el PELBD de más bajo peso molecular, funcionalizado, no se encontraron variaciones significativas en la resistencia al impacto, se obtuvo traslucidez y se observó, en las micrografías, una reducción en el tama o de las estructuras en la fase dispersa. Este resultado parece estar íntimamente relacionado con la relación de viscosidades de los componentes de estas mezclas y el grado de funcionalización obtenido. En las propiedades tensiles se encontró una reducción en el módulo de Young y en la resistencia y elongación hasta la ruptura en todas las mezclas estudiadas. In this research, blends of commercial poly(vinyl chloride) with linear low density polyethylenes (LLDPE) and high density polyethylenes (HDPE) pure and functionalized were evaluated. Different proportions of initiator (dicumyl peroxide-DCP) and 10 phr of a functionalizing agent (diethyl maleate-DEM) were used in order to accomplish the functionalization of polyethylenes. The compounds were prepared in a twin screw extruder with a PVC/PE blend ratio of 65/35. The functionalization degree was determined by infrared spectroscopy (FTIR). Blends were characterized by differential scanning calorimetry (DSC) and by mechanical testing (tensile and impact strength); the morphology of the blends was also determined by scanning electron microscopy (SEM). Results obtained indicate that the functionalization of polyethylenes improves the processability of their blends with PVC. For the blends of PVC with lower K value and grafted LLDPE with lower molecular weigth, not variation on the impact strength was obtained; samples more translucent were
The narratives behind the numbers: An approach to mixed methods research within the alcohol research field
Jeanette stergaard
Nordic Studies on Alcohol and Drugs , 2011, DOI: 10.2478/v10199-011-0041-0
Abstract: AIM - This article introduces a conceptual framework for conducting mixed methods within the alcohol research field by suggesting that any data analysis - qualitative or quantitative - is also a narrative or social representation. Theoretically, the paper draws on Andrew Abbott (1997; 1998) and Howard Becker (2007), arguing that three ordered forms of representation are performed in quantitative analyses based on survey studies: The first order of representation refers to how participants respond to or interpret a survey question; the second to the arrangement and interpretation of variables in quantitative analysis and shows that measurements can have networks of meanings and the third to ways of merging quantitative analysis with other material, such as qualitative data. DATA AND METHOD - Empirically, the paper illustrates the first order of representation through an analysis of 13 focus group interviews. In these young people discussed selected international survey questions, which later were used in two representative surveys on alcohol and illegal drug use, conducted in 2005 amongst 2 000 15-16-year-olds and in 2008 amongst 5 000 17-19-year-olds. CONCLUSION - The article discusses how insights of the first order of representation are useful when researchers wish to carry out the second and third orders of representation.
EUROPEAN AND AMERICAN PERSPECTIVES ON THE CHOICE OF LAW REGARDING CROSS-BORDER INSOLVENCIES OF MULTINATIONAL CORPORATIONS – SUGGESTIONS FOR SOUTH AFRICA
Jeanette Weideman
Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad , 2012,
Abstract: An increase in economic globalisation and international trade has amounted to an increase in the number of multinational enterprises that have debt, own assets and conduct business in various jurisdictions around the world. This, coupled with the recent worldwide economic recession, has inevitably caused the increased occurrence of multinational financial default, also known as cross-border insolvency (CBI). The legal response to this trend has, inter alia, produced two important international instruments that were designed to address key issues associated with CBI. Firstly, the United Nations Commission on International Trade Law (UNCITRAL) adopted the UNCITRAL Model Law on Cross-Border Insolvency (the Model Law) in 1997, which has been adopted by nineteen countries including the United States of America and South Africa. Secondly, the European Union (EU) adopted the European Council Regulation on Insolvency Proceedings (EC Regulation) in 2000. Both the EC Regulation and Chapter 15 adopt a “modified universalist” approach towards CBI matters. Europe and the United States of America are currently the world leaders in the area of CBI and the CBI legislation adopted and applied in these jurisdictions seems to be effective. As South Africa’s Cross-Border Insolvency Act is not yet effective, there is no local policy guidance available to insolvency practitioners with regard to the application of the Model Law. At the basis of this article is the view that an analysis of the European and American approaches to CBI matters will provide South African practitioners with valuable insight, knowledge and lessons that could be used to understand and apply the principles adopted and applied in terms of the EC Regulation and Chapter 15, specifically the COMI concept, the “establishment” concept in the case of integrated multinational enterprises and related aspects.
Development of a Music Therapy Service in an Australian Public Rehabilitation Hospital
Jeanette Tamplin
Voices: A World Forum for Music Therapy , 2006,
Abstract: It is often challenging to find information about the details and development of clinical music therapy programs in other parts of the world. This article addresses a gap in the literature by describing the evolution of a neurological rehabilitation program over the past two years in Melbourne, Australia. After providing some local details on the development of rehabilitation music therapy in this part of the world, a brief rationale is offered for the place of music therapy in clinical rehabilitation services. This is followed by a detailed description of the implementation, operation and evaluation of the music therapy program established at the Royal Talbot Rehabilitation Centre in 2004. Music therapy in adult neurological rehabilitation is still an emerging area of practice in Australia. Although the first music therapy service for adult rehabilitation was piloted and developed here over 13 years ago, few rehabilitation facilities currently employ music therapy as a standard part of rehabilitation service. Although research and practice of music therapy in rehabilitation internationally is relatively new, it has been practiced for around 20 to 30 years in the United Kingdom and the United States of America respectively. The scarcity of music therapy positions in rehabilitation facilities in Australia is possibly a reflection of the lack of understanding of music therapy on the part of funding bodies and the shortage of rigorous music therapy research in this field. The establishment of new music therapy positions in rehabilitation facilities reflects the development of music therapy in neurorehabilitation internationally in terms of research, clinical practice and publications.
Preparing for the Online Catalog
  Jeanette Mosey
Journal of Library and Information Science , 1982,
Abstract: 頁次:54-61
Deformations of Quantum Symmetric Algebras Extended by Groups
Jeanette Shakalli
Mathematics , 2012,
Abstract: We discuss a general construction of a deformation of a smash product algebra coming from an action of a particular Hopf algebra. This Hopf algebra is generated by skew-primitive and group-like elements, and depends on a complex parameter. The smash product algebra is defined on the quantum symmetric algebra of a finite-dimensional vector space and a group. In particular, an application of this result has enabled us to find a deformation of such a smash product algebra which is, to the best of our knowledge, the first known example of a deformation in which the new relations in the deformed algebra involve elements of the original vector space. Using Hochschild cohomology, we show that the resulting deformations are nontrivial by giving the precise characterization of the infinitesimal.
Energizing Social Interactions at Work: An Exploration of Relationships that Generate Employee and Organizational Thriving  [PDF]
Robert M. Rosales
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.49004
Abstract:
A company’s greatest asset is its people provided they are fully engaged. In our increa-singly service-based economies, social relationships and swift coordination among employees are the means by which a lot of work gets done. Thus, whether organiza-tions and their employees flourish or languish largely depends on the quality of the so-cial connections they nurture. The quality of the workplace connections can be defined as life giving (high quality) or life depleting (low quality). Positive social interactions facilitate organizational learning, cooperation, effectiveness, and employee loyalty, among many other desirable outcomes. High-quality connections are brief, mutually beneficial, and dynamic dyadic interactions, which have the power to energize people with vital resources to do their work well. Positive psychology and positive organizational scholarship—the science of how people and organizations flourish—provides us with tools that can help bring about high-quality connections. This paper defines high-quality connections at work, examines the benefits of high- quality connections, and provides a framework for building high-quality connections. The paper shows that high-quality connections are a pathway to build individual and organizational flourishing.
Improving First Year Nursing Student’s Test Scores through Pediatric Simulation  [PDF]
Jeanette Harris, Tamara Berghout, Pamela Anderson
Open Journal of Nursing (OJN) , 2015, DOI: 10.4236/ojn.2015.58076
Abstract: Background: Student test scores in the pediatric portion were at a national percentile rank of 30, which was concerning. It was theorized that the main contributor to this dilemma was that the majority of students were not able to have a pediatric clinical experience. Objective: The purpose of this project was to determine if the addition of pediatric simulation scenarios would have an impact on student learning as evidenced by end of level test scores. Method: A convenience sample (n = 100) of first year nursing students attending a university in the western United States participated in this project. This was a mixed methods study. A quasi-experimental design was used to compare test scores of both a non-intervention group and an intervention group of students. A 5 point Likert scale questionnaire was also using post-intervention to assess for changes in perceptions of self-confidence. Results: After implementation of the pediatric focused scenarios, students’ test scores increased to the 95th percentile. This 65 percentile increase is a significant change that suggests that pediatric simulation is effective in improving student exam performance. In addition, 81% of students also reported perceptions of increased levels of self-confidence after implementation of simulation scenarios. Conclusion: The findings suggest that simulation is an effective way to create alternative pediatric clinical experiences which can, in turn, increase student comprehension, test scores, and self-confidence.
Distance Measure Based Rules for Voltage Regulation with Loss Reduction  [PDF]
Y. Rosales Hernandez, T Hiyama
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2009, DOI: 10.4236/jemaa.2009.12013
Abstract: This paper presents a rule-based technique to control the voltage in a power transmission network. Transformers with a tap changer installed in the system are selected by the proposed technique as control devices. For each bus under volt-age violation, the most effective control device is selected by using the minimum electric distance criteria. In order to demonstrate the efficiency of the method, several simulations were performed using an IEEE 30-bus network as a model system. The distance measure technique is compared with classic voltage regulation approach and a genetic algorithm based. The results obtained show the robustness of the proposed method.
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