oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 14 )

2018 ( 29 )

2017 ( 27 )

2016 ( 35 )

Custom range...

Search Results: 1 - 10 of 15784 matches for " Miguel "
All listed articles are free for downloading (OA Articles)
Page 1 /15784
Display every page Item
Late surgical correction of anomalous left coronary artery from pulmonary trunk in children, using autogenous aortic and pulmonary endotheliazed tube  [PDF]
Miguel A. Maluf
World Journal of Cardiovascular Diseases (WJCD) , 2012, DOI: 10.4236/wjcd.2012.23022
Abstract: Background: Direct re-implantation of an anomalous left coronary artery into the aorta is the preferred surgical option for creating a dual coronary arterial system in patients in whom the anomalous artery originated from the pulmonary trunk. This technique, however, is applicable only when the anomalous ar- tery arises from the left posterior pulmonary sinus. We report the successfully late follow-up of series of patients employing a new technique using combined autogenous aortic and pulmonary endotheliazed tube. Patients and Methods: We have treated 3 patients, aged 2 months, 6 months and 8 months respectively, who presented with anomalous origin of the left coronary artery from the left posterior pulmonary sinus and moderated mitral valve insufficiency by left ventricle dysfunction. We used a trapdoor like coronary artery elongation with autogenous aortic and pulmonary endotheliazed tube to connect the left coronary ostium to ascending aorta, avoiding the mitral valve intervention. Results: There was no early or late death. All patients are in functional class I, with good biventricular function and competent mitral valve at a median follow-up of 94 months, ranged from 108 to 132 months. Postoperative Computerized tomogramphy of aorta in our 1st patient showed good arterial flow, without any distortion. A local and distal stenosis of the left pulmonary artery was observed and submitted to stent treatment. Conclusions: The potential benefits of the trapdoor like and its modification technique are excellent operative exposure. The use of autogenous endothelized tube is a viable tissue capable of further growth, avoidance of injury to the aortic and pulmonary valvar apparatus or production of obstruction within the right ventricular outflow tract.
Senning operation for correction of the transposition of the great arteries, results, long-term outcome and quality of life  [PDF]
Miguel Angel Maluf
World Journal of Cardiovascular Diseases (WJCD) , 2012, DOI: 10.4236/wjcd.2012.23036
Abstract: Objective: Long-term results after the Senning operation for transposition of the great arteries are little known. Sinus node dysfunction and systemic ventricular dysfunction are crucial in patient survival. We evaluated the results, long term outcome and quality of life in a group of 39 patients. Methods: The study was a retrospective analysis, of 39 (39/40 = 97.5%) surgical surviving patients, submitted to Senning operation, with a mean follow-up time of 14.7 +/– 3.1 years. Electrocardiogram, echocardiogram, and chest radiograph series were performed every 6 months. Thirty six patients of this series underwent Holter study and ergometric test, to evaluate the physical capacity. Three patients living overseas were excluded. Results: There was only one late death (1/39) (late mortality = 2.5%): a 16 year-old patient had a no cardiac death. The actuarial survival was 95.0% (38/40) (simple or with little VSD, TGA). The probability of staying in sinus rhythm, in 39 surviving patients was 77.1% (30) or normal right ventricular function was 76.5% (29), 10 to 20 years after operation. The incidence of sinus node and right ventricular dysfunction increased gradually over time. No re-operations and pacemaker implantation, was performed. Functional class: I = 30 (85.7%) cases and functional class II = 5 (14.3%) cases. Conclusions: Patients with simple TGA submitted to Senning procedure in our experience, presented during late follow-up: 1—Low incidence of right ventricular dysfunction and active arrhythmias; 2—Low mortality and no sudden death recorded; 3—Good quality of life and 4—Satisfactory surgical results (free of re-operation or definitive pacemaker implantation).
“Good Vibrations”: The Social Networks of Optimists and Alter-Optimists  [PDF]
Miguel Pereira Lopes
Social Networking (SN) , 2012, DOI: 10.4236/sn.2012.11001
Abstract: This study empirically tested if the personality trait of optimism and the interpersonal capability to generate optimism in one’s network nodes (i.e., alter-optimism) influences the social relationship patterns. The results provide evidence that optimism trait is independent from the way social networks of personal-issue sharing, advice-seeking, problem-solving, and innovation, are structured. In contrary, the alter-optimism capability does provide a good explanation of one’s social network position. Implications of these findings are discussed at the end.
Are Foreign and Public Investment Spending Productive in the Argentine Case? A Single Break Unit Root and Cointegration Analysis, 1960-2010.  [PDF]
Miguel D. Ramirez
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.36093
Abstract: This paper addresses the important question of whether public investment spending and inward foreign direct investment (FDI) flows enhance economic growth and labor productivity in Argentina. The paper estimates a dynamic labor productivity function for the 1960-2010 period that incorporates the impact of public and private investment spending, the labor force, and export growth. Single break (Zivot-Andrews) unit root and cointegration analysis suggest that (lagged) increases in public investment spending on economic and social infrastructure have a positive and significant effect on the rate of labor productivity growth. In addition, the model is estimated for a shorter period (1970-2010) to capture the impact of inward FDI flows. The estimates suggest that (lagged) inward FDI flows have a positive and significant impact on labor productivity growth, while increases in the labor force have a negative effect. From a policy standpoint, the findings call into question the politically expedient policy in many Latin American countries, including Argentina during the 1990s and early 2000s, of disproportionately reducing public capital expenditures to meet reducetions in the fiscal deficit as a proportion of GDP. The results give further support to progrowth policies designed to promote public investment spending and attract inward FDI flows.
A Dialectical Approach to Positive Organizational Studies  [PDF]
Miguel Pereira Lopes
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.32024
Abstract:

Over the last decade, an academic movement emerged towards the study of positive phenomena in management and organization studies. Since then, two different scientific research streams have emerged in line with this positive approach to management: 1) positive organizational scholarship (POS), which proposes a trait approach view of positive virtues and strengths and sees the environment as a moderator variable which facilitates or not the exhibition of corresponding positive behaviours; and positive organizational behaviour (POB), which defends a state-like perspective of positive characteristics, thus putting a strong emphasis on situational factors as determinants of positive behaviour, leaving a marginal role to positive psychological traits. As a critical comparison between these two different research streams is yet to be done, in this paper I propose a dialectical approach to study positivity in organizations and contrast these two different ontological approaches to positivity in organizations. I presented arguments to demonstrate that each of these approaches alone constitute quite a limited proposal in that each of them seems to misleadingly assume that: traits cannot be changed; they show incongruence between assumptions and purpose and; they constitute biased viewpoints. A dialectical approach makes possible to overcome these shortcomings by assuming both personality characteristics and environmental features relate each other in an intertwined complex way to produce positive behaviour in organizations. I finally present some practical implications that a dialectical approach would have to organizations and managers.

The Accounting Analysis of Banking Company: The Case of CAM  [PDF]
Miguel Angel Perez Benedito
Modern Economy (ME) , 2015, DOI: 10.4236/me.2015.62015
Abstract: The measure of management risk has been a constant in Economy in the recent past. This issue is present on any kind of economic or financial activity. The solution adopted for international authorities, increasing liquidity of financial market and generating new indicators to support making decisions, means the continuity of applying the monetary theory as general criteria to solve the actual crisis. In this labyrinth, the manuscript uses the Accounting Methodology of Edgeworth’s Box as a new methodology to measure the management of Banking Companies and analyzes the acquisition of the CAM and Bank Sabadell, two Spanish banking companies. Finally, the manuscript analyzes the financial crisis in Spain through the behavior of listed banking companies in IBEX 35. The manuscript concludes that accounting can explain equilibrium in economy, and it only needs to know how they can be measured properly.
A Longitudinal Study of Academic Success and Failure in Compulsory Secondary Education and Baccalaureate Students through the Millon Adolescent Clinical Inventory (MACI)  [PDF]
Miguel ángel Broc
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.612139
Abstract: Aretrospective longitudinal study of a final sample of 311 Spanish students in compulsory secondary education (CSE) and baccalaureate (BAC) between 1 and 6 years after administration of MACI was conducted by analyzing “a posteriori” if they were able to graduate or not in CSE, as well as some form of baccalaureate. The effects of factors such as grade, sex and graduate/urdergraduate were studied over measured variables by MACI, related with personality traits, the concerns expressed and clinical syndromes. Looking retrospectively if emerging patterns of certain personality variables characterizing students as a function of previous factors, statistically significant variables (p < 0.05) that clearly differentiate these types of students are detected based on sex, in fourteen scales scores are higher for women, with predominance of internalizing trend and with a large effect size in variables as body disapproval (0.81) and eating disorders (0.87), and in six scales boys with externalizing trend and a large effect of sex factor on the variable predisposition to delinquency (0.81) as well as between different types of academic performance, especially undergraduate students in scales 2A, 6B, 9, B, G and H. Finally, references to clinical intervention techniques and educational community services, in Spain, are proposed.
The History, the Memory and the Educational Institution: A Necessary Relationship  [PDF]
Maria Elisabeth Blanck Miguel
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.79140
Abstract: This paper discusses the relationship between history, memory and the institution of the school. It builds on what the process of searching for, analyzing and interpreting sources according to a theoretical framework reveals about the way the institution of the elementary school came into being in the province of Paraná (1854-1889). Such reflections resulted from dealing with official documents, reports and letters of the public teaching (Presidents of the Province, General Inspectors of Public teaching and teachers who worked in schools) preserved in the Public Archives of Paraná. For in depth analysis we used Le Goff, Saviani, Magalhaes, Farge, Bloch, Thompson and Ciavatta. The reflections proceed from the position that teachers demonstrated originated by the schools. It is concluded that although the data presented by the people in charge at the end of the provincial period showed the failure of the school education, in fact, the work of the teachers has contributed to the process of the institution of the elementary school in the Province.
Internal Vibration and Synchronization of Four Coupled Self-Excited Elastic Beams  [PDF]
Miguel A. Barron
Open Journal of Applied Sciences (OJAppS) , 2016, DOI: 10.4236/ojapps.2016.68050
Abstract: The vibration behavior and the synchronization between some internal points of four coupled self-excited beams are numerically studied. Coupling through the root of the beams is considered. The transverse displacements of the internal points and the beam tips are monitored, and the power spectra of the resulting time series are employed to determine the oscillation frequencies. The synchronization between beams is analyzed using phase portraits and correlation coefficients. Numerical results show multiple frequencies in the vibration pattern, and complex patterns of synchronization between pairs of beams.
Study of Depletion and Contamination Profile of Dioxins in Duck Intensive Production  [PDF]
Miguel Cardo, Fernando Bernardo
Journal of Environmental Protection (JEP) , 2016, DOI: 10.4236/jep.2016.713160
Abstract: During 2016, following the implementation of a dioxin contamination monitoring in poultry meat (ducks) in a slaughterhouse, a positive sample was found. The investigation identified the wood shavings used as bedding material in the duck farm as the possible source of contamination of these animals. In this episode, contamination profiles of higher and lower concentrations, seem to be very similar, being OCDD, OCDF and 1,2,3,4,6,7,8-HpCDD responsible for 74.4% of the total contamination of those animals. The study revealed a reduction of poultry contamination after the removal of the source of contamination, with an average daily depletion percentage level ranging between 1.43% and 4.35%.
Page 1 /15784
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.