Pemodelan Aliran Udara Di Sekitar Sayap Pesawat Secara 3 Dimensi Menggunakan Persamaan Navier-stokes

Telah dilakukan pembuatan simulasi aliran fluida disekitar sayap pesawat pendekatan Navier-Stokes. Parameter tekanan dan kecepatan hasil dari simulasi ini telah mewakili perilaku fluida secara umum. Simulasi yang telah dibuat juga didesain untuk fleksibel mengikuti perangkat perhitungan yang tersedia. Untuk mendapatkan sebuah hasil yang baik, metode pendekatan komputasi yang dipergunakan ialah beda hingga (finite different) dengan persamaan Navier-Stokes. Saat ini diperlukan model komputasi yang dapat dipergunakan untuk menganalisa pergerakan aliran fluida disekitar sayap. Hal tersebut bertujuan untuk mempermudah analisa dan mengurangi baik biaya maupun waktu pendesainan pesawat terbang. Baik hasil perhitungan maupun tampilan dari model ini telah memberikan informasi yang cukup banyak sebagai bahan analisa meskipun beberapa kekurangan yang belum dapat diperbaiki karena keterbatasan perangkat perhitungan

Selective Breeding to Improve Productive and Reproductive Performances and Survivability of Indigenous Sakini Chicken

Indigenous chickens are quite popular in Family Poultry Production System (FPPS) in Nepal, but are constrained with their low productive performance. The present study evaluated the productive and reproductive performance of Sakini chicken in different filial generations and sexes. In addition, research also aimed at understanding the effect of generations on above performances. Initially, base populations (G-0) of Sakini were maintained by collecting eight weeks old birds from different agro-ecologial zones of Nepal. Performance of the birds of G-0 was evaluated based on weekly body weight (12-24 weeks), laying performance, fertility, hatchability, hatch weight and survivability. Selected birds of base population (G-0) were used to produce first (G-1), second (G-2) and third (G-3) generations through selective breeding in each generation. Similarly, body weights at hatching, 12 weeks, 16 weeks, 20 week and 24 weeks were significantly (p<0.001) improved from G0 to G3 and were also significantly (p<0.001) differ for sex (males were always heavier than females). Likewise, there was significant (p<0.05) improvement in egg production (per hen per year), age at first lay (days), body weight at sexual maturity, egg number and egg weight at 90 days of laying in progressive generations. Fertility, hatchability and survivability significantly (p<0.05) improved in selected generations in comparison to base population, whereas, no significant difference was obtained within the different selected population. Thus, indigenous Sakini chicken under this experiment performed better with respect to survivability, fertility and hatchability in later generations that provides ample scope of advancing selective breeding activities within the indigenous population in order to bring significant improvement in the overall productive performance of Sakini chicken in Nepal

Analisis Jarak Microphone Array Dengan Teknik Pemrosesan Sinyal Fast Fourier Transform Beamforming

The main problem in the application of the sound source detection is to estimate the angle of the wave or called as Direction Of Arrival (DOA) of Planewave. The method commonly to overcome the problem to utilize the sensor array by the data processing technique such as a beamforming technique. In this research was done by DOA estimation that used technique Fast Fourier Trasnfrom (FFT) beamformer with sensor configuration by Uniform Linear Array (ULA). The analysis has been to determine the distance of the array microphone that has DOA estimation with high accuration to the real source posisition. Based on the variation of distance of array microphone tested, shown the 6 cm is the bes distance which has the most dominant DOA estimation results with high accurac

Pemilihan Pemasok Bahan Mentah Pada Restoran Menggunakan Metode Fuzzy Analytical Hierarchy Process

Production in the restaurant is a continuous production that must be provided with uncertain request based on the consumer demand. Availability of raw materials is preferred to support the production process. In purchasing management it is often difficult to choose the right supplier of raw materials for each process order. The purpose of this research is to implement the method of Fuzzy Analytical Hierarchy Process (FAHP) in the Decision Support System (DSS) purchase of raw materials to suppliers. The addition of fuzzy logic in AHP is used to enhance the accuracy of subjectivity in the process of purchasing management assessment for each criteria and alternatives.The analysis includes a comparison with the results of manual calculations based SPK FAHP and accuracy of the final system with expert recommendations for the management of the purchase order process of DSS.The results showed an increase in profit of the accuracy of the selection of suppliers restaurant using FAHP method compared with the manual method. The analysis shows a significant difference when applied to the same material, fixed price of each supplier but different number of purchases, able to provide the difference in price which means lower costs and increase profits purchase.Index Terms — DSS, FAHP, Supplier Management, Order Management, Raw Material, FAHP

Alat Ukur Impedansi Akustik Material Logam Dengan Metode Ultrasonik Pulsa Echo

Untuk mengidentifikasi suatu jenis logam salah satunya dapat digunakan parameter impedansi akustik. Dalam mencari besar impedansi akustik dari logam biasanya digunakan metode ultrasonik pulsa echo. Metode pulsa echo adalah metode yang didasarkan pada perhitungan delay time dari gelombang pantul pertama dan kedua pada benda uji. Selain itu, untuk meningkatkan keakuratan dalam mencari delay time maka digunakan teknik envelope. Teknik envelope berguna untuk mencari puncak dari pola sinyal pantul. Perangkat lunak LabVIEW digunakan untuk membuat program saat proses perhitungan nilai impedansi akustik. Pengukuran dilakukan pada logam aluminium, kuningan, besi, dan stainless steel. Kombinasi metode pulsa echo dan teknik envelope pada penelitian ini mampu memberikan hasil impedansi akustik yang akurat dengan rata-rata error di bawah 5 %

Game Chicken Roll Dengan Menggunakan Metode Forward Chaining

Metode forward chaining pada umumnya digunakan untuk sistem pendukung keputusan dan sistem pakar. Penelitian ini menggunakan algoritma forward chaining, khususnya untuk proses review dan untuk menentukan apakah seorang pemain game layak melanjutkan ke level berikutnya. Algoritma forward chaining adalah algoritma yang berbasiskan pada fakta-fakta atau premise yang ada sehingga menghasilkan sebuah kesimpulan atau konsekuen. Hasil pengujian menunjukkan bahwa nilai validitas mencapai 100%. Hasil didapat dari komparasi data antara rules dan hasil pengujian yang didapat saat bermain game