The Effect of Force Ratio Multiplier on A Control System for Surfing Problem Simulation

A surfing problem is a control problem of the surfing board to maintain its position on top of an ocean wave as long as possible. There are some physical and mathematical problems regarding a surfing problem that have not yet been solved. One of them is on translating a target inclination problem from an ordinary differential equation (ODE) control system to the inclination control system via the distribution of a surfers weight. To move the surfing board swiftly, a correct value of the multiplier, which is notated by σ, is needed on the weight distribution system. In this work, an investigation has been done on the effect of the multiplier in an attempt to help moves the surfing board fulfils the target inclination angle needed by using a smoothed particle hydrodynamics (SPH) simulation. The result from this work shows that the best value for the multiplier is σ=10 that gives the smallest average positional error for some variations of a given target position. This work gives a contribution on an attempt to model a surfers phenomenon mathematically

Kerangka Kerja Manajemen Proyek Perangkat Lunak Instansi Pemerintah

Proyek perangkat lunak di instansi pemerintah membawa perubahan penting dalam sistem dan proses pemerintahan, memperbaiki penyampaian layanan di dalam dan antar lembaga, penyampaian layanan pada sektor bisnis, dan pelayanan kepada masyarakat. Proyek perangkat lunak sangat dinamis dan penuh ketidakpastian serta berbagai permasalahan yang disebabkan oleh jadwal tertunda, biaya membengkak dan hasil ketidakpuasan terhadap hasil yang dicapai. Berbagai upaya telah dilakukan untuk melakukan perbaikan kepada manajemen proyek TI, khususnya proyek rekayasa perangkat lunak, tetapi tidak ada yang khusus menciptakan kerangka manajemen proyek perangkat lunak untuk instansi pemerintah. Penelitian ini menggabungkan PMBOK, SWEBOK dan Peraturan Presiden nomor 4 tahun 2015 untuk merancang kerangka kerja manajemen proyek perangkat lunak pada instansi pemerintah. Penelitian ini menghasilkan sebuah kerangka kerja manajemen proyek perangkat lunak yang dapat digunakan untuk instansi pemerintah. Kerangka kerja tersebut terdiri atas 39 (tiga puluh sembilan) proses manajemen proyek yang terbagi ke dalam 10 (sepuluh) area pengetahuan

Water Discharge and River Depth Measurement Using Fuzzy Logic Based on Internet of Things

Based on statistics from Indonesian National Board for Disaster Management (BNPB) there are still many casualties caused by drifting or drowning in rivers every year. This is because most victims do not have sufficient information related to water discharge and river depth. In an effort to reduce the potential victims of these problems, a prototype was designed to provide a warning regarding river status as a display in the detail condition of the river in real-time. In this research, a prototype measuring instrument was produced that could provide information on water discharge and river depth in a sustainable and real-time manner. The prototype device consists of two main sensors as an implementation of internet of things, a water flow sensor and an ultrasonic sensor. Water flow sensor used to calculate the water discharge, and ultrasonic sensor used to measure depth of the river. Fuzzy logic has been used because it can work well for simple classification and work similarly like human reasoning. This information can be monitored through the website and LCD attached on the device. The results of the study with the help of the Linear Congruential Generator (LCG) method indicated that greater input value of the water discharge and the river depth caused more dangerous of the river status. Whereas the prototype produced has an error range of 5-6 cm for depth information generated by the ultrasonic sensor while the accuracy of the water flow sensor on the master device is 79.75% and the slave device is 84%. &nbsp