Kinetic surface roughening for the Mullins-Herring equation

Using the linearity property of the Mullins-Herring equation when the velocity is zero with a Gaussian noise, we obtain an analytic form for the global mean-square surface width and height-height correlation function. This can be used to read the critical exponents in any dimension. In particular for d=1 we show that although the surface is super rough the system exhibits Family-Vicsek scaling behavior.Comment: 5 page

Diffusion of Latent Semantic Analysis as a Research Tool: A Social Network Analysis Approach

Latent Semantic Analysis (LSA) is a relatively new research tool with a wide range of applications in different fields ranging from discourse analysis to cognitive science, from information retrieval to machine learning and so on. In this paper, we chart the development and diffusion of LSA as a research tool using Social Network Analysis (SNA) approach that reveals the social structure of a discipline in terms of collaboration among scientists. Using Thomson Reuters’ Web of Science (WoS), we identified 65 papers with “Latent Semantic Analysis” in their titles and 250 papers in their topics (but not in titles) between 1990 and 2008. We then analyzed those papers using bibliometric and SNA techniques such as co-authorship and cluster analysis. It appears that as the emphasis moves from the research tool (LSA) itself to its applications in different fields, citations to papers with LSA in their titles tend to decrease. The productivity of authors fits Lotka’s Law while the network of authors is quite loose. Networks of journals cited in papers with LSA in their titles and topics are well connected

THE IMPACT OF AUTHENTIC LEADERSHIP ON JOB SATISFACTION AND TEAM COMMITMENT

One of the challenges toward organization is maintaining good employees in competitive business environment in order to achieve their goals. Employees’ feeling and attitude to their job, team and organization is an important factor which can’t be ignored by organization. In other words, the employees’ effective response to different aspect of job and organization will have several effects on their performance and behavior. One of the important factors in all organizations is organizational leadership as one of the most key strategies to achieving this purpose. Authentic leadership as one of the areas raised in the literature of modern leadership in recent years has been considered by researchers and practitioners. In this study, we explored the impact of authentic leadership and its elements on team commitment and job satisfaction. 80 questionnaires were filled by employees and analyzed by SPSS 18.0 software. According to obtained results, there were meaningful and positive correlation between authentic leadership, job satisfaction and team commitment. Also we conclude that teams with more authentic characteristics in their leaders, had more satisfied and committed employees.authentic leadership, balanced processing, job satisfaction, moral/ethics, self awareness, team commitment, transparency.

Modeling, synthesis, and characterization of thin film copper oxide for solar cells

The modeling, growth, and characterization of Copper Oxide thin films for solar cell applications are reported. Cu_2O has several attractive properties which include its direct band gap (Eg=2.17 eV) for use in photoelectrolysis of water and use in tandem multi-junction cells. Detailed balance calculations predict efficiencies on the order of 20% while Cu_2O cells have yet to even pass 2% efficiency. The device physics model reveals that defects, particularly at the heterojunction interface, are the main reason for lowered efficiencies. Epitaxial Cu_2O (100) thin films on MgO are fabricated using RF Oxygen plasma MBE. The films are quite smooth and showed mobilites in the range of 10-100 cm^2/V*sec and carrier concentrations in the range of 10^(14)-10^(17). Finally, the epitaxial growth of Cu_2O on a MgO template is demonstrated