Improved prediction of laminar leading edge separation

Research was conducted to provide a definite criterion for the prediction of the bubble burst on airfoils typical of those used for fighter wings. The approach taken was to correlate existing airfoil bubble burst data using various parameters at the laminar separation point. The method due to Weber was modified to provide a continuous analytic solution for the velocity distribution around the airfoil leading edge. Coupling the modified Weber method with the Stratford laminar separation prediction method leads to a universal chart giving the conditions at separation as a function of stagnation location and leading edge radius. Application of the combined method to available two-dimensional airfoil data resulted in an empirical criterion presenting the limiting local velocity gradient at separation as a function of the boundary layer momentum thickness at separation for bubble burst. The correlation leads as well to the qualitative explanation of two types of laminar stall: thin airfoil and leading edge. The validity of the correlation is demonstrated by predicting the lift coefficient and angle of attack for stall on airfoils with leading edge or trailing edge flaps

Two models of constitutionalism and the legitimacy of law : Dicey or Marshall ?

The article was first published in the Oxford University Commonwealth Law Journal.[À l'origine dans / Was originally part of : Fac. Droit - Coll. facultaire - Théories du droit

Determinan Penentu Holding Period pada Indeks Lq45

Penelitian ini bertujuan untuk mengetahui signifikansi pengaruh bid-ask spread, market value, dividend payout ratio, risk of return dan earning per share terhadap holding period pada Indeks LQ45 selama periode 2010-2013. Penelitian ini dilakukan pada Perusahaan-Perusahaan yang terdaftar pada Indeks LQ45 selama periode 2010 hingga 2013 (8 kuartal). Jumlah sampel yang digunakan pada penelitian ini sebanyak 23 Perusahaan dengan metode purposive sampling. Pengumpulan data dilakukan melalui observasi non partisipan. Teknik analisis yang digunakan adalah regresi linear berganda.Berdasarkan hasil analisis ditemukan bahwa bid-ask spread berpengaruh negatif dan tidak signifikan terhadap holding period pada Indeks LQ45. Market value dan dividend payout ratio berpengaruh positif dan signifikan terhadap holding period pada Indeks LQ45. Risk of return berpengaruh negatif dan signifikan terhadap holding period pada Indeks LQ45. Earning per share berpengaruh positif dan tidak signifikan terhadap holding period pada Indeks LQ45

Pengaruh Tax Avoidance dan Board Diversity terhadap Kinerja Perusahaan dalam Perspektif Corporate Governance

The purpose of this research is to analyze the impact of tax avoidance and board diversity on corporate performance in the perspective of corporate governance. The research was conducted for non-financial firms listed on the Indonesia Stock Exchange period 2010 to 2013.In this research, tax avoidance is measured by Cash Effective Tax Rate (CETR), board diversity is measured by 3 proxies, i.e. age, educational background and tenure of the board of directors, and the performance of the company is measured by the Tobin\u27s Q ratio. Analysis of panel data with fixed effects model was used to analyze the influence of independent variables and the dependent variable. The results of this study indicate that the tax avoidance negatively affects the corporate performance and board diversity not affects the corporate performance

Pengaruh Kepemimpinan Transformasional, Kepuasan Kerja, Keadilan Prosedural terhadap Kinerja Karyawan dengan Variabel Mediasi Organizational Citizenship Behavior (Ocb)

The purpose of this study is to find out whether there is influence of transformational leadership, job satisfaction, procedural fairness to employee performance with moderation variable that is Organizational Citizenship Behavior (OCB). Source of data is primer using the questionnaire taken on the object of research of Bank Syariah Batam with the number of samples as much as 150 respondents of Bank Syariah employees. The research used quantitative descriptive analysis and processed data with SPSS 22 that is regression analysis and path analysis. The results show that there is a positive influence of transformational leadership, job satisfaction, procedural justice on employee performance. Transformational leadership, job satisfaction affects OCB, but procedural justice has no effect on OCB. OCB mediates transformational leadership on employee performance, OCB also mediates job satisfaction on employee performance, but OCB does not mediate procedural justic