juwariyah, tatik
Universitas Islam Sultan Agung

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KOMPUTASI NUMERIK GERAK PROYEKTIL DUA DIMENSI MEMPERHITUNGKAN GAYA HAMBATAN UDARA DENGAN METODE RUNGE-KUTTA4 DAN DIVISUALISASIKAN DI GUI MATLAB Juwariyah, Tatik
Bina Teknika Vol 11, No 2 (2015): Bina Teknika
Publisher : Fakultas Teknik UPN "Veteran" Jakarta

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Abstract

The simulation of two dimensional projectile motion problem with including resisting force as velocity function in MATLAB program has been done.The two dimensional projectile motion problem was formulated in second order differential equation which included resitance form as linier velocity function. The second order differential of motion then separated into two coupled first order differential equation and then numerically was soluted by Runge_Kutta4 method. The visualisation of computation values as a path of projectile motion and others physics quantities like dissipation energy were shown by MATLAB GUIDE.
ANALISA RESISTIVITAS KAWAT PENGHANTAR DITINJAU DARI METODE JEMBATAN WHEATSTONE DAN METODE HUKUM OHM PADA MODUL PRAKTIKUM FISIKA Juwariyah, Tatik; Djaja, Yuhani
Bina Teknika Vol 12, No 2 (2016): Bina Teknika
Publisher : Fakultas Teknik UPN "Veteran" Jakarta

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Abstract

The analysis of the resistivity of a wire based on the Wheatstone bridge method and the Ohm law method in physics experiment module has been done. The analysis of the resistivity of a wire was done in a physics laboratory at UPNVJ engineering faculty. This topic was studied because there has been no experiment in the themed of electricity in the physics experiment module at the faculty of engineering UPNVJ. The most popular method applied to obtain wire resistivity value is the Ohm law method. In order to enlarge the understanding of the electricity concept, this research needed other method that can be used to find out the wire resistivity namely the Wheatstone Bridge method. This research aimed to obtain the resistivity value of Nichrome wire from two different methods. The methods were the Ohm law method and the Wheatstone bridge method. In Ohm law method, the wire length was subsequent varied. Then, the electric voltage value and an electric current were recorded. While in the Wheatstone bridge method, it was used circuit bridge. The value of the variable resistor was varied and the segment length metal plate was measured. The data were processed in order to obtain the Nichrome wire resistivity values by linear regression method. From Ohm law method and the Wheatstone bridge method were respectively obtained the value of Nichrome wire was ρ±Δρ=(2,875±0,005)x10-6 Ωm and ρ±Δρ=(5,00±0,25)x10-6 Ωm. The results of the two methods are match with the value of the standard of the Nichrome wire is ρ=1,0x10-6 Ωm. By using the two methods, it was expected that the students’ understanding of the electricity concept was increasingly widespread.
KAJIAN NUMERIK MASALAH SYARAT BATAS MELALUI PENYELESAIAN MATRIKS TRIDIAGONAL (Studi Kasus : Menghitung Potensial Listrik) Juwariyah, Tatik
Bina Teknika Vol 13, No 1 (2017): Bina Teknika
Publisher : Fakultas Teknik UPN "Veteran" Jakarta

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Abstract

A numerical study of the solution of boundary value problems with the tridiagonal matrix approach has been done. The case studied is computing the electrical potential expressed by 1D Poisson’s equation with boundary conditions. The 1D Poisson’s equation are then discreted with the finite different method so as to form a system of linier equations. The system of non homogeneous linear equations that can be formed is a tridiagonal matrix. Then the matrix is solved by Gaussian elimination algorithm. On this study, the algorithm is implemented on three programming languages namely, Fortran, Java and MATLAB.
Perancangan Sistem Deteksi Dini Pencegah Kebakaran Rumah Berbasis IoT(Internet of Things) Juwariyah, Tatik; Prayitno, Sugeng; Mardhiyya, Akalily
SEINASI-KESI Vol 1, No 1 (2018): Seinasi-Kesi 2018
Publisher : Fakultas Ilmu Komputer UPN Veteran Jakarta

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Abstract

Musibah kebakaran rumah yang bermula dari adanya kebocoran gas LPG di ruangdapur masih sering di terjadi di sekitar kita. Teknologi rumah cerdas(smart home)dapat diterapkan sebagai salah satu solusi untuk mengamankan ruangan dapur daripotensi kebakaran. Tujuan penelitian ini adalah merancang suatu sistem deteksi dinipencegah kebakaran berbasis Arduino, sensor gas, sensor api, ESP8266 dan sistempemberitahuan berbasis aplikasi Blynk di smartphone. Rancangan sistem terdiri darirangkaian perangkat keras (hardware) yang bekerja sesuai dengan perintah perangkatlunak(software). Rangkaian perangkat keras terdiri dari mikrokontroler ArduinoMega2560, sensor Gas MQ6, sensor api dan board ESP8266 sebagai embedded chipyang mampu berkomunikasi berbasis WiFi. Modul ESP8266 digunakan sebagai clientdari router WiFi. Fungsi modul ini adalah mengirimkan dan menerima data informasiantara mikrokontroler dan smartphone. Komunikasi tersebut didukung oleh pustakaBlynk dan aplikasi Blynk sebagai antarmuka grafis pengguna di smartphone android.Hasil rancangan sistem diuji coba pertama kali sebagai alat deteksi api. Tanggapansistem terhadap adanya api berupa berubahnya warna LED virtual di aplikasi Blynk.Uji coba sistem deteksi api lebih lanjut berupa data variasi jarak sensor api dan sumberapi terhadap waktu tanggap sistem. Uji coba terpisah lainnya adalah sebagaipendeteksi keberadaan gas. Tanggapan sistem terhadap kebocoran gas berupaberubahnya Level Virtual antarmuka Blynk di smartphone. Perubahan Level Virtualmerepresentasikan nilai konsentrasi gas yang dinyatakan oleh nilai voltase sensor gas.Hasil perancangan smarthome ini diharapkan menjadi salah satu referensi sistempencegah potensi kebakaran berbasis IoT.