The Rate of Turbulent Kinetic Energy Dissipation in a Turbulent Boundary layer on a Flat Plate

The rate of turbulent kinetic energy dissipation (e) is an important parameter in the turbulent flows, such as pipe flows, channel flows, atmospheric turbulence, ocean turbulence, and turbulent boundary layer flows. This study is concerning in the evaluation of the rate of turbulent kinetic energy dissipation in turbulent boundary layers developing on a flat plate. In this study, e is obtained simply from the calculation using Taylor’s frozen hypothesis. The study is performed experimentally using a low speed wind tunnel with a squared test section of 91 x 91 x 540 cm. The maximum attainable freestream velocity is approximately of 15 m/s with freestream turbulence intensity is less than 0.5%. Instantaneous fluid velocity is measured using a hot-wire anemometry system connected to a data acqusition and a personal computer. The experiments are performed at freestream velocities of 2.0 m/sec and 5.5 m/sec corresponding with momentum thickness Reynolds numbers (Rq) of approximately 1000 and 3000, respectively. The results show that maximum value of e is at approximately 1 < y+ < 10 at both Reynolds numbers. The results of e in the smooth-wall flat plate boundary layer are compared to that in the boundary layer on the flat plate modified with a square groove. There is a slight difference between e in the smooth-wall flat plate boundary layer and that in the boundary layer on the flat plate with a square groove

Peningkatan Kompetensi Menyusun Rpp melalui Bimbingan Berkelanjutan Guru SD

Generally, RPP is not in accordance with the standards and has not complied with the rules of preparation of the RPP. This happens due to the lack of ability of teachers to prepare lesson plans. Therefore, it needs continuous guidance conducted by the Principal in preparing the RPP and also to improve the ability of teachers. The method used is Action Research School with two (2) cycles. Data collection using observation, interviews, and questionnaires. At the initial conditions obtained average value of teachers' ability to grade 1, 2, 3 in preparing the RPP: 24.5, and Master Classes 4, 5, 6 in preparing the RPP: 22.7. In the first cycle obtained average value teachers' ability to Class 1, 2, 3 in preparing the RPP: 35.75 and Master Classes 4, 5, 6 in menyususn RPP: 35.66. In Cycle II obtained average value the ability of teachers 1, 2, 3 in preparing the RPP: 46, and the teacher 4, 5, 6 in preparing the RPP: 45.66

PENGARUH PERPUTARAN PERSEDIAAN, PERPUTARAN PIUTANG DAN PERTUMBUHAN PENJUALAN TERHADAP LABA PADA PERUSAHAAN FARMASI YANG TERDAFTAR DI BURSA EFEK INDONESIA PERIODE 2012-2014

This research aims to know the influence of rotation of the inventory, accounts receivable turnover and profit on sales growth against pharmaceutical companies. This testing is carried out using Eviews application Version 8.1. Analysis of the multiple linear regression was used. The results showed that the partial inventory turnover have a significant effect on earnings, receivables turnover no significant effect on earnings and sales growth has no significant effect on earnings.Simultaneously the results showed that the rotation of the inventory, accounts receivable turnover and sales growth effect significantly to profits. The magnitude of the coefficient of determination (adj. R2) is 0.850105. This means that a bound variable i.e. 85.01% profit can be explained by three free variables i.e. accounts receivable turnover, inventory turnover and sales growth. While the rest of 14.99% explained by other variables which are not entered into the model

Study of Flow Characteristics in a Closed-Loop Low-Speed Wind Tunnel

Wind tunnel is an element or experimental device that plays an important role in the development of aerodynamics. In general, there are two types of wind tunnels: open-loop wind tunnels and closed-loop wind tunnels. Furthermore, based on the flow velocity in the wind tunnel, the wind tunnel can also be categorized into several types: low-speed wind tunnel and high-speed wind tunnel, including sub-sonic and supersonic wind tunnels. In this study it is used a low-speed closed-loop wind tunnel type. The maximum atainable velocity of airflow in the wind tunnel is about 46 m/s with turbulence intensity (TI) as low as 0.41 percent. The flow parameters that being evaluated in this study include the velocity profiles and intensity of turbulence (TI) in some parts or sections of the wind tunnel. Pressure measurements in the wind tunnel are performed using a Pitot tube connected to a calibrated pressure transducer. The measured values of pressures are then converted into the fluid velocities and turbulence intensities. The results show that the flow quality in the main test section of the wind tunnel is good enough. The intensity of the flow turbulence on the inlet side of the test section is about 0.41 percent at the centerline velocity of approximately 40 m/s. In some parts of the wind tunnel, turbulence intensity is still relatively high, as in the small elbow outlet where TI is higher than 18 percent

PROSES KREATIF MENULIS USAHA INTERPRETASI NILAI PENDIDIKAN DALAM KARYA SASTRA

The idea in this paper is an effort to optimize learning to appreciate literary works during the Pandemic. This paper will map the problems of literary learning during the Covid-19 pandemic by looking at the creative process of writing as an effort to interpret the value of education in literary works. The problem of learning literary appreciation carried out by teachers and students during this Pandemic will be revealed some of the creative processes of writing and its steps. By writing literary works, the hope for increasing the understanding and interpretation of literary works can be maximized and the purpose of appreciation in shaping educational values can be achieved

PROSES KREATIF MENULIS USAHA INTERPRETASI NILAI PENDIDIKAN DALAM KARYA SASTRA

The idea in this paper is an effort to optimize learning to appreciate literary works during the Pandemic. This paper will map the problems of literary learning during the Covid-19 pandemic by looking at the creative process of writing as an effort to interpret the value of education in literary works. The problem of learning literary appreciation carried out by teachers and students during this Pandemic will be revealed some of the creative processes of writing and its steps. By writing literary works, the hope for increasing the understanding and interpretation of literary works can be maximized and the purpose of appreciation in shaping educational values can be achieved

Numerical Study of Airfoil Selection and Analysis of 3D Flow Phenomenon past Finite-Span Wings for Small UAVs

Small unmanned aerial vehicle (SUAV) is an unmanned aircraft vehicle (UAV) that flies at an altitude of lower than 1,100 m from the ground, has a maximum gross takeoff weight of 10 kg, and a flight speed of less than 50 m/s. One of the design factors for the small UAV design with a fixed-wing propeller is the airfoil selection. The selection of an airfoil profile using aerodynamic concepts leads to a performance coefficient that determines the selected airfoil’s sustainability and efficiency. The coefficients used are CL, CD, and CM. Numerical studies were carried out using Computational Fluid Dynamics using XFLR5 and ANSYS Fluent 19.1 software to evaluate airfoils in 2D and evaluate the phenomenon of induced drag on the wings in 3D. Airfoil selection was made on five types of airfoils: AH 83-150 Q, E399, E431, E715, and E662. The coefficients of CL, CD, and CM were obtained by varying α. 3D analysis of selected airfoil geometry with finite span. Simulation of steady conditions using Reynolds-Averaged-Navier-Stokes (RANS) in the Spalart-Allmaras turbulent model with variations of α = 0 ◦ , 8◦ , 12◦ , and 16◦ . The post-processor visualized the flow around the wing with pressure contours, velocity pathlines, and tip vortices. The analysis was carried out on the aerodynamic coefficients of CL, CD, CM, and CMr with α variation on the finite span wing. Based on the research, the results showed that the selected airfoil was E431, the aerodynamic performance of the CL, CD, CL/CD, CM, and CMr wings. In addition, information was also obtained regarding a decrease in the pressure difference between the upper surface and lower surface of the wing with an increasing span, 3D streamline, the extent of the contour of the vorticity magnitude, and a streamline on the wingtip on the upper surface and lower surface of the wing

Analisis Kemampuan Economic Value Added Dan Market Value Added Untuk Mengukur Kinerja Keuangan PT Indocement Tunggal Prakarsa, Tbk

The purpose of this study to analyze the financial performance of PT. Indocement Tunggal Prakasa, Tbk by Economic Value Added method and Market Value Added method. The research method used by the writer is descriptive quantitative. The results showed that the value of EVA and MVA PT. Indocement Tunggal Prakasa, Tbk has fluctuated and reached positive value during 2011-2014. EVA and MVA positively indicates that the company is able to generate economic value added and create wealth for shareholder