Vortex simulation of forced mixing layers

Two-dimensional, spatially growing, turbulent mixing layers are simulated numerically by a vortex method and the results are compared with those determined experimentally. The effects of artificial forcing on flow development are also studied. Many of the flow features which have been observed experimentally are reproduced, and good quantitative agreements between experiments and computations are obtained

Dynamic Trust Federation in Grids

Grids are becoming economically viable and productive tools. Grids provide a way of utilizing a vast array of linked resources such as computing systems, databases and services online within Virtual Organizations (VO). However, today’s Grid architectures are not capable of supporting dynamic, agile federation across multiple administrative domains and the main barrier, which hinders dynamic federation over short time scales is security. Federating security and trust is one of the most significant architectural issues in Grids. Existing relevant standards and specifications can be used to federate security services, but do not directly address the dynamic extension of business trust relationships into the digital domain. In this paper we describe an experiment in which we highlight those challenging architectural issues and we will further describe how the approach that combines dynamic trust federation and dynamic authorization mechanism can address dynamic security trust federation in Grids. The experiment made with the prototype described in this paper is used in the NextGRID project for the definition of requirements for next generation Grid architectures adapted to business application need

A study of promotional broadcasting on commercial radio and television stations by colleges and universities in the United States.

Thesis (M.S.)--Boston Universit

The Challenges Facing Co-operative Societies In Kenya A Case Study: Kenya Planter Co-operative Union (KPCU)

Co-operative societies sector in kenya play a very important role to the members by giving them affordable financial credit and investment advisory services which help in improving the economic life of the members and the development of the country at large.  However, these co-operative societies suffer common problems associated with weak legislation, poor financial management, leadership, governance and political interferance among many  others. Specifically this study will be looking at the challenges that are facing Co-operative societies, a case study of Kenya Planters Co-operative Union (KPCU).  This study will mainly focus on the leadership as the main challenge that is affecting Co-operative Societies in Kenya.   This project is a review study of whether KPCU could have been saved if the above mentioned issue was well monitored.  The beneficiaries of this case study will be stakeholders including: Directors, management of Co-operative societies, employees, suppliers, consumers and the Government. This proposal aims at enlightening those that are managing Co-operative societies to improve in ways they conduct the affairs of the co-operative societies.  The anticipated challenges include time and resources.  Other challenges anticipated are securing interviews with senior staff and unwillingness of staff to fill questionnaires due to fear of victimization. The study uses descriptive method which involves the collection of information by interviewing some respondents and administering questionnaires. Other sources that will be used for data collection will be text books, journals, magazines and the internet.  Recommendations and conclusions are drawn from the responses  received from the data collected. Data is analyzed from the information collected from the questionnaire and the interviews conducted. The method of analyzing data will be determined using statistics.  Stratified sampling techniques will be used to select samples. This method will allow the researcher to divide the sample into appropriate strata that are mutually exclusive. Data is presented through charts, graphs and tables. Key words: Leadership, Leadership challenges, Co-operatives Performanc

The Effects of Variables on the Penetration and Pickup of Starch Applied at the Size Press

A literature research is presented concerning the pickup and penetration of starch at the size press. The literature research indicates there is very little quantitative results in this area. The objective of the experimental work is to determine the effect of starch temperature, sheet moisture, and machine speed on the penetration of starch into the sheet. The depth and quantity of penetration was obtained by using a spectrophotometer to determine the concentration of starch in microtomed samples. The experimental results indicated that increased temperature of starch solutions and increased machine speeds increases penetration. Penetration also increases with increasing moisture content of the paper but only to an optimum moisture content. The effects of penetration and pickup on physical and optical test results are also discussed in the discussion section

An Unusual Appearance of the Cyanogen Bands

A unique formation and excitation of the CN molecule occurred in the resonance tube. (Observed in connection with the investigation of the mercury hydride molecule.) The bands which were noted belong to the 2Σ → 2Σ electronic system. The excitation has been determined to be due to collisions of the CN molecule with excited mercury atoms in the 63P state

Factors Affecting the Choice and Adoption of Business Strategies in Financial Sector: A Survey of Banking Institutions in Eldoret Kenya

Poor choice of strategies costs many organizations millions of dollars, On other hand, the good choice of strategy which is implemented and monitored badly is likely to born bad results at the end. For example a good choice of outsourcing strategy accompanied by lack of funds to support this program will be futile. This study sought to examine factors influencing adoption of business strategies in financial institutions using a survey of commercial banks in Eldoret Town Kenya. The objectives of this study was to  determine the relationship between corporate culture and strategic orientation, to assess the relationship between industry competition and strategic orientation, evaluate the relationship between resources and strategic orientation and to examine the relationship between organizational structure and strategic orientation in the Banking Institutions within Eldoret town. The study was carried out on all banks in Eldoret and five management staff were selected randomly from five sections within each bank to participate in the study and this yielded 75 respondents. The collected data was coded and analysed using both quantitative and qualitative techniques with help of SPSS. Inferential statistics were used to test the significance of findings i.e. t-test and regression analysis. The findings of this study revealed that there is significant relationship between corporate culture and business level strategic orientation within the banking sector and that organizational structure influence the choice and adoption of business level strategies in the banking institutions. It also showed a significant correlation between industry competition and strategic orientation and .finally, resources were found to be a major factor influencing the business level strategies in the banking institutions. The findings will benefit both banks and other financial institutions in identifying the factors suitable for business performance. Keywords: SWOT Analysis, Strategic Planning, Strategy Meetings/Workshops, Benchmarking, Porter’s 5 Forces Model, Balance Scorecard, Value chain analysis, PESTEL analysis, Core Competencies, Scenario Planning, BCG Matrix, Outsourcing, Change Management Programs, Strategic alliances, Stakeholder mapping

Density Functional Study of Ternary Topological Insulator Thin Films

Using an ab-initio density functional theory based electronic structure method with a semi-local density approximation, we study thin-film electronic properties of two topological insulators based on ternary compounds of Tl (Thallium) and Bi (Bismuth). We consider TlBiX$_2$ (X=Se, Te) and Bi$_2$$X$_2$Y (X,Y= Se,Te) compounds which provide better Dirac cones, compared to the model binary compounds Bi$_2$X$_3$ (X=Se, Te). With this property in combination with a structurally perfect bulk crystal, the latter ternary compound has been found to have improved surface electronic transport in recent experiments. In this article, we discuss the nature of surface states, their locations in the Brillouin zone and their interactions within the bulk region. Our calculations suggest a critical thin film thickness to maintain the Dirac cone which is significantly smaller than that in binary Bi-based compounds. Atomic relaxations or rearrangements are found to affect the Dirac cone in some of these compounds. And with the help of layer-projected surface charge densities, we discuss the penetration depth of the surface states into the bulk region. The electronic spectrum of these ternary compounds agrees very well with the available experimental results.Comment: 9 pages, 11 figures, 1 table, Accepted for publication in Physical Review

Looking Beyond the Incumbent: The Effects of Exposing Corruption on Electoral Outcomes

Does information about rampant political corruption increase electoral participation and the support for challenger parties? Democratic theory assumes that offering more information to voters will enhance electoral accountability. However, if there is consistent evidence suggesting that voters punish corrupt incumbents, it is unclear whether this translates into increased support for challengers and higher political participation. We provide experimental evidence that information about copious corruption not only decreases incumbent support in local elections in Mexico, but also decreases voter turnout, challengers' votes, and erodes voters' identification with the party of the corrupt incumbent. Our results suggest that while flows of information are necessary, they may be insufficient to improve political accountability, since voters may respond to information by withdrawing from the political process. We conclude with a discussion of the institutional contexts that could allow increased access to information to promote government accountability.