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“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.
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.

Simple General Purpose Ion Beam Deceleration System Using a Single Electrode Lens  [PDF]
J. Lopes, J. Rocha
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.33014
Abstract: Ion beam deceleration properties of a newly developed low-energy ion beam implantation system were studied. The objective of this system was to produce general purpose low-energy (5 to 15 keV) implantations with high current beam of hundreds of μA level, providing the most wide implantation area possible and allowing continuously magnetic scanning of the beam over the sample(s). This paper describes the developed system installed in the high-current ion implanter at the Laboratory of Accelerators and Radiation Technologies of the Nuclear and Technological Cam-pus, Sacavém, Portugal (CTN).
Calling for Authentic Leadership: The Moderator Role of Calling on the Relationship between Authentic Leadership and Work Engagement  [PDF]
Victor Seco, Miguel Pereira Lopes
Open Journal of Leadership (OJL) , 2013, DOI: 10.4236/ojl.2013.24015
Abstract:
Authentic Leadership (AL) literature supports the existence of a positive relationship between perceived AL, follower work engagement, and positive attitudes like calling. Our research doesn’t confirm that relationship and fosters the possibility of AL influence could not be felt by employees. It was also expected, theoretically, a positive effect of Calling as well as with trust. We have found a significant negative effect on the relationship between AL and calling. But our findings brought some positive insights. There was a positive significant relationship between calling and work engagement. Calling had also moderated, with a positive significant result, the relationship between AL and work engagement. Future research should focus on the importance of perceived AL within the education public services, and the significant effect of calling on work engagement. Our study suggests that organizations could promote employee calling work orientation, stimulate leaders to become more authentic, and improve positively organization performance.
Evaluation of Inherent Uncertainties of the Homogeneous Effective Thermal Conductivity Approach in Modeling of Printed Circuit Boards for Space Applications  [PDF]
Rafael Lopes Costa, Valeri Vlassov
Journal of Electronics Cooling and Thermal Control (JECTC) , 2013, DOI: 10.4236/jectc.2013.31005
Abstract:

Electronic components are normally assembled to printed circuit boards (PCBs). Such components generate heat in operation which must be conducted away efficiently from the small mounting areas to frames where the PCB is fixed. The temperature of the component depends on heat dissipation rate, technology and parameters of mounting, component placement and finally effective thermal conductivity (keff) of the board. The temperature of some components may reach significant magnitudes over 100°C while the PCB frame is kept at near-ambient temperature. The reliability of electronic components is directly related to operating temperature; so the thermal project should be able to provide a correct temperature prediction of all PCB components under the hottest operational condition. In space applications, the main way to spread and reject heat of electronic equipment is by thermal conduction once there is no air available to apply convection-based cooling techniques. The PCB keff is an important parameter for the electronics thermal analysis when the PCB is modeled as a simplified homogeneous board with a unique thermal conductivity. In this paper, an intrinsic uncertainty of such approach is firstly reveled and its magnitude is evaluated for a real space use PCB. The simulation uses SINDA/FLUINT Thermal Desktop and aims to determine the keff of the PCB by comparison between a detailed multi-layered anisotropic model and an

Luz, arte, ciência... a??o!
Lopes, Thelma;
História, Ciências, Saúde-Manguinhos , 2005, DOI: 10.1590/S0104-59702005000400021
Abstract: the article offers some reflections on the main interactions between theater, science, and technology down through the history of theater. based on our experience at "science in the spotlight", part of the casa de oswaldo cruz's museum of life, we discuss how these interactions can be part of a science museum's daily activities. we use the word 'science' in its broad sense, encompassing not only the natural but human sciences as well; likewise, we use the word 'technology' as it relates to applied science. art and science are understood here as creative processes, as ways of representing the world and expressing human knowledge.
Andando com Paul Auster
Lopes, Denilson;
Alea : Estudos Neolatinos , 2005, DOI: 10.1590/S1517-106X2005000200004
Abstract: essay about the fiction of paul auster, searching from an understanding of how landscape and narrative intertwin themselves, present invisibility and disappearance as ethic and aesthetic alternatives in the contemporary world.
Para além da barreira dos números: desigualdades raciais e saúde
Lopes, Fernanda;
Cadernos de Saúde Pública , 2005, DOI: 10.1590/S0102-311X2005000500034
Abstract: the point of departure for this article was the concept of health as a set of comprehensive and collective living conditions, influenced by the political, socioeconomic, cultural, and environmental context. the work thus shows that studies on health inequalities, disparities, or iniquities should extend beyond statistical data, since racism is not always explicit and measurable in social interactions. it is necessary to analyze the various life experiences of blacks and non-blacks in a given social condition, considering gender, age, place of residence, schooling, family origin, occupation, income, sexual orientation, religious affiliation, capacities and incapacities, social network, and possibilities for accessing social goods and services. finally, the article lists guidelines that can assist in the major challenge of drafting public policies to combat and eradicate the immense inequalities between whites and blacks.
Constante de Boltzmann
Lopes, Wilson;
Revista Brasileira de Ensino de Física , 2010, DOI: 10.1590/S1806-11172010000300008
Abstract: in this work, a barometric equation was established to relate the physical quantities of the low atmosphere: pressure, altitude, and temperature with the ratio between the boltzmann's constant and the medium mass of molecules of the constituent gases. for geopotential altitude not superior to 33 km and assuming the medium mass of the molecule 4,809 x 10-26 kg, a medium value was obtained for boltzmann's constant of 1,373 x 10-23 j/k
The occurrence of Aedes (Stegomyia) aegypti (Linnaeus) and Aedes (Stegomyia) albopictus (Skuse) in a rural area in Northern Paraná, Brazil and the associated Culicidae fauna
Lopes, José;
Revista Brasileira de Zoologia , 2002, DOI: 10.1590/S0101-81752002000400012
Abstract: to verify the possible occurrence of aedes aegypti (linnaeus, 1761) and aedes albopictus (skuse, 1894) in a rural area in northern paraná, brazil, a water tank was installedon a farm, to work as an artificial breeding site. collections were carried out every 15 days, during a period of 2 years. 12,876 culicidae larvae, belonging to 10 different species, including aedes aegypti and aedes albopictus, were collected, indicating their occurrence.
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