Karst or limestone is a landscape in the form of unique. Karst or limestone has sensitive properties and is easily dissolved in water so that the karst topography has a subsurface water system in the form of holes that are susceptible to degradation due to the very fast flow of water so that it is easy to pass water underground. The purpose of this study was to determine the level of vulnerability of karst underground water pollution based on remote sensing data and GIS in the Rengel-Tuban Indonesia karst region. This type of research is quantitative research. Data analysis techniques in this study used image interpretation and logistic regression tests. The researched result is known that Remote sensing imagery and GIS as a tool to identify the level of vulnerability of underground water pollution in the karst region. Utilization of remote sensing imagery and GIS is presented as information of vulnerability of underground water pollution, and the study showed that the average area of karst Rengel was classified as vulnerable to pollution. In conclusion that the average area study was classified as vulnerable to pollution, and the Rengel karst hills are in line with local levels of vulnerability and pollution
Teknologi semakin maju pada jaman sekarang dan berkembang sangatlah cepat, salah satunya alat transportasi dalam gedung bertingkat yaitu lift. Lift merupakan teknologi modern saat ini yang mempunyai fungsi membawa orang atau barang dari satu tingkat ke tingkat yang lainnya yang bergerak secara vertikal. Penelitian saat ini yang dilakukan bertujuan untuk melihat hasil respon sistem menggunakan PID metode Optimization Genetic Algorithm pada prototipe lift dikarenakan dapat mengurangi overshoot dan mempercepat waktu naik dari plant tersebut. Dalam penelitian sistem lift dengan menggunakan metode algoritma genetika mendapatkan nilai parameter PID dengan Kp = 8,946; Ki = 3,898, Kd = 0,011. Ketika memperoleh parameter PID dan dimulasikan pada simulink, dapat dilihat hasil respon sistem yang stabil dengan overshoot pada sistem ini sebesar 0.327%. Respon sistem yang optimal terdapat di setpoint 29 rpm dengan waktu tunak (Ts) sebesar 1.168s. Error Stedy State sebesar 0,3%, waktu naik (Tr) sebesar 0,601s dan waktu tunda (Td) sebesar 0.2032 s.
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