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Search Results: 1 - 10 of 328380 matches for " Elisa S. Moncarz "
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The Rise and Collapse of Enron: Financial Innovation, Errors and Lessons
Elisa S. Moncarz,Raúl Moncarz,Alejandra Cabello,Benjamin Moncarz
Contaduría y administración , 2006,
Abstract: Recent collapses of high profile business failures like Enron, Worldcom, Parmlat, and Tyco has been a subject of great debate among regulators, investors, government and academics in the recent past. Enrons case was the greatest failure in the history of American capitalism and had a major impact on financial markets by ′causing significant losses to investors. Enron was a company ranked by Fortune as the most innovative company in the United States; it exemplified the transition from the production to the knowledge economy. Many lessons can we learn from its collapse. In this paper we present an analysis of the factors that contributed to Enron′s rise and failure, underlying the role that energy deregulation and manipulation of financial statements played on Enron′s demise. We summarize some lessons that can be learned in order to prevent another Enron and restore confidence in the financial markets, as well as in the accounting and auditing professions.
“To Lucia with love”: Lucia as educator in nervous conditions “To Lucia with love”: Lucia as educator in nervous conditions
Elisa S. Thiago
Ilha do Desterro , 2008,
Abstract: Lucia had been brought up in “abject poverty” but “her spirit had experimented with living and drawn its own conclusions” (127). Lucia’s poverty places her in the position of a subaltern within the narrative of Tsiti Dangarembga’s Nervous Conditions. At the level of criticism, therefore, the expectation formed about Lucia as a subaltern is that she has neither voice nor agency. A close scrutiny of Lucia’s spirit, however, reveals a process of thinking that is meaningful to our understanding of the development of her subjectivity. Lucia had been brought up in “abject poverty” but “her spirit had experimented with living and drawn its own conclusions” (127). Lucia’s poverty places her in the position of a subaltern within the narrative of Tsiti Dangarembga’s Nervous Conditions. At the level of criticism, therefore, the expectation formed about Lucia as a subaltern is that she has neither voice nor agency. A close scrutiny of Lucia’s spirit, however, reveals a process of thinking that is meaningful to our understanding of the development of her subjectivity.
Revista Bravo!: análise de um periódico n o científico como fonte de informa o na área literária
Laís Paggi,Elisa Correa
Revista ACB , 2012,
Abstract: [PORTUGUESE] Na pesquisa apresentada objetivou-se analisar a qualidade e credibilidade da Revista Bravo!, Um periódico n o-cientifico, como fonte de informa o na área literária. Utilizou-se para a consecu o do objetivo, a metodologia de avalia o de fontes de informa o presentes na literatura em Biblioteconomia e Ciência de Informa o. Procurou-se avaliar o site de acordo com os seguintes critérios que comp em a metodologia de avalia o de fonte de informa o eletr nica: Informa o de identifica o, consistência das informa es, confiabilidade das informa es, adequa o da fonte, características da navega o, facilidade de uso, layout da fonte, restri es percebidas e suporte ao usuário. No tocante à avalia o especifica da se o de literatura do site foram utilizados os critérios autoridade, pertinência e atualiza o dos links oferecidos na se o, presentes na metodologia utilizada. Como resultados verificou-se que, embora periódico estudado possua pontos em seu formato a serem melhorados, pode ser considerado uma fonte de informa o de qualidade com credibilidade na área literária, devido à autoridade dos criadores intelectuais da se o, que estudam e vivenciam a prática literária e est o habilitados a discorrer sobre os assuntos propostos. [ENGLISH]The objective of the research presented, analyze the quality and credibility of the magazine Bravo!, a no scientific journal, as a source of information in the literary field. It was used to achieve the objective, the methodology for evaluating sources of information in the literature of Library and Information Science. The site was according to criteria that make up the methodology for evaluating electronic information sources and to specifically assess the Literature section of the site according to the criteria the authority, relevance and accuracy of the links offered on section, presents the methodology used. As a result, it was found that although periodic points have studied their format to be improved, can be considered a source of quality information with credibility in the literary field, due to the authority of intellectual creators of the section, who study and live the literary practice and are able to discuss the topics.
EFECTO DE LA ALTURA EN LA RADIACIóN SOLAR ULTRAVIOLETA EN ARICA NORTE DE CHILE
Rivas,Miguel; Rojas,Elisa; Cortés,Juan; Santander,Elisa;
Revista Facultad de Ingeniería - Universidad de Tarapacá , 2002, DOI: 10.4067/S0718-13372002001000007
Abstract: in this work, using transfer radiative models, we present results obtained when calculating the levels of solar ultraviolet radiation that reach arica at sea level, as well as altitudes of 4.500 m above sea level. (lat.: 18o 49' s; long. 70o 19' w). the level of solar ultraviolet radiation that reaches the earth varies due to multiple factors, such as the geographical location (latitude), the thickness of the ozone layer present above, the cloud cover and the altitude above sea level. locations at both sea level and at 4500 m above sea level can be found in northern chile. these locations are specially adequate for the study of the effects of altitude in the increase of solar ultraviolet radiation. this topic is relevant because a great number of people, having jobs related to copper mining and tourism, who often travel moving from places that are located at sea level to settings that are situated at 5000 m above sea level, are exposed to significantly increased solar ultraviolet radiation.
EFECTO DE LA ALTURA EN LA RADIACIóN SOLAR ULTRAVIOLETA EN ARICA NORTE DE CHILE
Miguel Rivas,Elisa Rojas,Juan Cortés,Elisa Santander
Revista Facultad de Ingeniería - Universidad de Tarapacá , 2002,
Abstract: En este trabajo se presentan resultados obtenidos al calcular mediante el modelo TUV (Tropospherical Ultraviolet Visible Model) las dosis eritémicas y los índices de radiación solar ultravioleta que se reciben a nivel del mar en Arica (Lat.: 18o 49' S; Long. 70o 19' W) y zonas del altiplano. Entre los resultados más destacados obtenidos podemos mencionar: un aumento promedio en las dosis eritémicas de un 5.6%/km, lo cual muestra un buen acuerdo con datos experimentales, en los cálculos correspondientes a los índices de radiación solar ultravioleta encontramos que en ausencia de nubosidad el modelo teórico predice valores superiores a 20 ( en una escala dónde valores de índice ultravioleta superiores a 14 son considerados extremos). Estos valores calculados por el modelo se observan sobre los 1900 m de altitud y durante gran parte del a o (para días de cielo claro). El tema es de especial interés debido al creciente número de personas que se desplazan continuamente entre el nivel del mar y altitudes cercanas a los 5000 m de altura, esto se debe a trabajos relacionados con proyectos de la gran minería del cobre, como también a labores relativas al turismo. En ambos casos estas personas reciben importantes incrementos en los niveles de radiación solar ultravioleta. In this work, using transfer radiative models, we present results obtained when calculating the levels of solar ultraviolet radiation that reach Arica at sea level, as well as altitudes of 4.500 m above sea level. (Lat.: 18o 49' S; Long. 70o 19' W). The level of solar ultraviolet radiation that reaches the earth varies due to multiple factors, such as the geographical location (latitude), the thickness of the ozone layer present above, the cloud cover and the altitude above sea level. Locations at both sea level and at 4500 m above sea level can be found in northern Chile. These locations are specially adequate for the study of the effects of altitude in the increase of solar ultraviolet radiation. This topic is relevant because a great number of people, having jobs related to copper mining and tourism, who often travel moving from places that are located at sea level to settings that are situated at 5000 m above sea level, are exposed to significantly increased solar ultraviolet radiation.
Miscibility Behavior of Polyacrylamides Poly(Ethylene Glycol) Blends: Flory Huggins Interaction Parameter Determined by Thermal Analysis  [PDF]
Maria Elisa S. R. Silva, Valdir Mano, Raquel R. J. Pacheco, Roberto F. S. Freitas
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.47A2007
Abstract:

Blends of polyacrylamide—PAM, poly(N-isopropylacrylamide)—PNIPAAm, poly(N-tert-butylacrylamide)—PTBAA, poly(N,N-dimethylacrylamide)—PDMAA and poly(N,N-diethylacrylamide)—PDEAA with poly(ethylene glycol)— PEG were prepared by casting in methanol and water at concentrations of 20 wt%, 40 wt%, 60 wt%, and 80 wt% in PEG. The miscibility of the components was studied by Differential Scanning Calorimetry—DSC. All blend systems are characterized by a single glass transition temperature (Tg), close to the Tg of the amorphous component. The Hoffman Weeks method was used to determine equilibrium melting temperature (Tm) data. The determination of the melt point depression of the blends allowed the calculation of Flory-Huggins interaction parameter (χ12) of the two polymers in the melt, by using the Nishi Wang equation. The interaction parameters, calculated for all the blends, are slightly negative and close to zero, suggesting a partial miscibility between the components.

Reproductive Trends in Cebu Cattle Grazing Rice Crop Residues in Colombian Tropical Dry Forest  [PDF]
Elisa Sierra-Montoya, Rolando Barahona-Rosales, Z. Tatiana Ruíz-Cortés
Open Journal of Forestry (OJF) , 2013, DOI: 10.4236/ojf.2013.34B003
Abstract:

The objective of this study was to describe the trend of reproductive performance of primiparous and multiparous cows that grazed rice crop residues located in a Dry Tropical Forest of Colombia, taking into account the rainfall pattern of the place. In this study, 89 primiparous and 309 multiparous Cebu cattle records were analyzed. Mean, mean standard deviation for age at first calving and open days of primipar-ous Cebu cattle were 41.05± 1.85 months and 269.7±36.25 days respectively. Confidence intervals (95%) for both reproductive parameters were 36.8-45.3 months and 202.7-336.6 days respectively. For multiparous Cebu cattle, the mean and mean standard deviation for open days and calving interval were 245.6±36.8 days and 17.5±0.9 months respectively. Confidence intervals 207.1-366.9 days and 13.9-20.7 months respectively. The mean rainfall since 1999 until 2012 was1202 mmper year. The reproduc-tive trend of the primiparous cattle showed an increasing behavior of age at first calving since 1999 until 2012, that can possibly be explained due to the decreasing behavior of the rainfall throughout the years, that can affect the nutritional value and offer of the grass that can grow in the borders of the crop, such as Guinea and Star grass, and eventually affect the body condition and weight necessary to be ready for the first estrous. An inverse behavior of open days occurred, showing a decreased trend along the last years of research. This fact could have happened due to the intensive use of the enriched rice straw with urea and molasses lately. Regarding to the reproductive trend of the multiparous cattle, there is no an evident pat-tern of it. Factors such as rainfall, temperature, nutrition and management should have affected it. Further research on this topic is needed.

Host immunity in the protective response to nasal immunization with a pneumococcal antigen associated to live and heat-killed Lactobacillus casei
Elisa O Vinti?i, Marcela S Medina
BMC Immunology , 2011, DOI: 10.1186/1471-2172-12-46
Abstract: Nasal immunization of young mice with PppA+LcV and PppA+LcM induced anti-PppA IgA and IgG antibodies in mucosal and systemic compartments and levels of these specific antibodies remained high even at day 45 after the 3rd Immunization (3rd I). These results were correlated with IL-4 induction by the mixture of antigen plus LcV and LcM. Also, PppA+Lc (V and M) induced stimulation of Th1 and Th17 cells involved in the defence against pneumococci. The protection against pneumococcal respiratory challenge at day 30 after the 3rd I showed that PppA+LcV and PppA+LcM immunizations significantly reduced pathogen counts in nasal lavages while prventing their passage into lung and blood. Survival of mice immunized with the co-application of PppA plus LcV and LcM was significantly higher than in mice immunized with PppA alone and control mice when intraperitoneal challenge was performed. No significant differences between the treatments involving LcV and LcM were found.Live and heat-killed L. casei enhanced the antigen-specific immune response when administered nasally with a pneumococcal antigen. Considering the potential risk associated with live bacteria, the design of a nasal vaccine based on pneumococcal antigens and heat-killed L. casei emerges as a safe and effective strategy for the prevention of pneumococcal infections and opens new possibilities of application of dead LAB as adjuvants in vaccine formulations against other pathogens.Pneumococcal infections are one the most common diseases in both developed and developing countries [1,2]. Despite the widespread use of antibiotics, the emergence of antibiotic resistant Streptococcus pneumoniae strains and some problems associated with vaccines have made pneumococcal diseases a major health problem worldwide. At present, there are two types of pneumococcal vaccines in use: capsular polysaccharide pneumococcal vaccines (PPV) and protein-polysaccharide conjugate pneumococcal vaccines (PCV). PPV are not effective in elderly
Solteros o casados: ?Quién come mejor? La evidencia faunística del asentamiento minero histórico de Capote, región de Atacama (Chile)
Labarca,Rafael; Calás,Elisa; Rivera,Francisco;
Estudios atacame?os , 2010, DOI: 10.4067/S0718-10432010000100003
Abstract: based on zooarchaeological analyses, we discuss the possibility of detecting differences in the dietary choices of two population segments, singles and married, at the mining settlement of capote during the first half of xx century. keeping in mind the frequency of skeletal parts of domestic taxa, and their diversity, it is demonstrated that the married are better fed than singles. the former depend on the decisions of their women, while singles were subject to a that is primarily focused to a more restrictive diet that is primarily focused on resource maximization.
Padr?es de comportamento de busca e uso de informa??o por pesquisadores de biologia molecular e biotecnologia
Crespo, Isabel Merlo;Caregnato, S?nia Elisa;
Ciência da Informa??o , 2006, DOI: 10.1590/S0100-19652006000300003
Abstract: the information seeking and use behavior of molecular biology and biotechnology researchers has been analyzed based on david ellis′ model, in order to verify how scientific information published in digital media affects this behavior. a qualitative research approach was used and data was collected by means of an interview guide with a set of open questions, applied to faculty at the molecular biology and biotechnology department of the rio grande do sul federal university (ufrgs). the data was managed as a project on the nvivo 2.0 software for qualitative analysis, employing codification techniques, as well as the constant comparative method. the final results have shown a pattern in the information seeking and use behavior among the group of researchers characterized, in many aspects, by the use of technology, such as the use of non-linear information seeking strategies. it has been noted that electronic scientific journals are the most important source of information amongst these researchers, and that they are widely used and accepted. however, the same does not apply to those of free access, which are still used in a restricted way. it has also been concluded that, the ellis is a valid model, nevertheless, under some improvements and changes. this paper suggests new study topics related to the subject studied.
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