Analisis Transparansi, Optimalisasi Pengelolaan Zakat dan Efisiensi Terhadap Lembaga Zakat Infaq dan Shodaqoh Muhammadiyah (LAZISMU) Kabupaten Ponorogo

Many zakat institutions are competing to get a lot of funds but still do not pay attention to what they should pay attention to in accordance with the Shari’a and applicable rules. The existence of this research is to see the extent of transparency, optimization and efficiency level of zakat funds at the amil Zakat, Infaq and Shodaqoh Muhammadiyah Ponorogo institutions which have been available since 2005. The date used are primary and secondary date obtained from LAZISMU Ponorogo with interview techniques. The results of the discussion of this thesis is that the transparency variable is said to be transparency buy there are some shortcomings. The optimization variable can be said to be optimal although there is also something that needs to be added as an amplifier and the efisiency variable is very efficient with a value in 2017 of 17,19% and in 2018 of 18,15% an increase in the level of efisiency is due to the addition of employees.

Stiffness-based Spring Design Optimization using Taguchi Method to reduce Low-Frequency Vibration

Low-frequency vibration has been troublesome for a mechanical system. Despite the measurement difficulties, low-frequency vibration also creates several environmental effects such as high noise level that is harmful to the human body. One of the methods to reduce vibration is tuning the vibration isolation i.e. spring and damping coefficient. However, the latter method is found to be effective only for the mid-high frequency range. Therefore, this paper proposes an optimization of the spring a.k.a. stiffness coefficient in order to reduce the low-frequency vibration. The Taguchi method is used as an optimization tool since it offers simplicity yet powerful for any field of application, particularly in engineering. Two significant parameters in the spring geometry were selected as the optimization variable in the Taguchi method and evaluated using vibration transmissibility concept. The result shows that the Taguchi method has been successfully obtained the optimum value for the spring geometry purposely to reduce the vibration transmissibility.

Optimization of Sparse Concentric Ring Arrays for Low Sidelobe

To lower the peak sidelobe level (PSLL) of sparse concentric ring arrays, a method with multiple design constraints that embed a function model into modified real genetic algorithm (MGA) and select the grid ring radii as optimization individual to synthesize sparse concentric ring arrays is proposed. The multiple constraints include the array aperture, the minimum element spacing, and the number of elements. The proposed method dynamically calculates the ratio of element on each ring, and it has a faster convergence rate than other algorithms. The MGA uses real number to code the optimization variable, and it reduces the complexity of coding and improves the search efficiency. Finally, the results demonstrate the accuracy and effectiveness of the algorithm.

La derive dans l’évaluation de l’incertitude

Taking into account the instrumental drift in the uncertainty of measurement does not benefit at this time from a provided bibliography. Although an abundant literature (standards, articles, samples collections, etc.) dealing with the estimation of uncertainty by the GUM method exists, the question of the drift component is often avoided or inaccurate, usually limited to a point-to-point deviation divided by 2√3, which is based on an erroneous hypothesis and clearly confines to being immobile. The choice of a rectangular probability law supposes that the greatest variation observed is necessarily the greatest observable variation; in other words, during the observed history (sometimes reduced to two calibration certificates), we noted the maximum drift of which the instrument could be the object. If the method is effectively statistically questionable, it becomes completely useless as soon as a modification takes place; especially when the periodicity optimization (variable calibration frequency) is used or when the points are changed from one calibration to another, in number or level. We propose here an alternative method which intends to correct these defects and is at once compatible with the principles of the GUM and easily automatable.

Minimum Volume of the Longitudinal Fin with Rectangular and Triangular Profiles by a Modified Newton–Raphson Method

The minimum volume of the nonlinear longitudinal fin with rectangular and triangular profiles by using the modified Newton–Raphson method is presented in this paper. The dimension of the fin profile is regarded as the optimization variable. Furthermore, a mechanism called “volume updating” is added into the modified Newton–Raphson algorithm to obtain the minimum volume of the fin. Two examples are illustrated to demonstrate the proposed method. The obtained results showed that the proposed method can be used efficiently and accurately in finding the minimum volume of the nonlinear longitudinal fin problem with rectangular and triangle profiles.

Optimal Design Problems for the First p-Fractional Eigenvalue with Mixed Boundary Conditions

In this paper, we study an optimal shape design problem for the first eigenvalue of the fractionalp-Laplacian with mixed boundary conditions. The optimization variable is the set where the Dirichlet condition is imposed (that is restricted to have measure equal to a prescribed quantity α). We show existence of an optimal design and analyze the asymptotic behavior when the fractional parametersconverges to 1, and thus obtain asymptotic bounds that are independent of α.