Implementasi Algoritma D8 untuk Pencarian Titik Terendah pada Digital Elevation Model Nasional (DEMNAS)

Dengan mengetahui aliran air saat terjadinya hujan, maka potensi terjadinya genangan air atau banjir dapat diprediksi sejak dini. Hal ini memungkinkan pengambilan langkah atau antisipasi. Penelitian ini bertujuan untuk membangun sistem pemodelan arah aliran air permukaan dengan metode SFD dan untuk menentukan area terendah berdasarkan data ketinggian yang diperoleh dari DEMNAS dengan menggunakan Bahasa Pemograman Java. Jenis penelitian ini merupakan   perancangan   sistem   dalam   bentuk pemodelan yang diawali dengan perumusan masalah, studi kepustakaan dan penelitian eksperimental dengan luaran aplikasi pemodelan dan simulasi aliran air permukaan dengan menerapkan algoritma D8 dalam pencarian alirannya. Hasil penelitian menunjukkan bahwa aplikasi yang dibuat dapat memprediksi arah aliran air dan juga menampilkan area terendah pada data DEM berupa sin

The Effectivity of Fish-Killer Fruit (Barringtonia asiatica) as Natural Anaesthesia Source in Commond Carp Fingerlings (Cyprinus Carpio)

Penelitian ini dilakukan untuk mengetahui efektifitas penggunaan ekstrak buah keben sebagai bahan anestesi pada benih ikan mas. Ekstrak buah keben digunakan sebagai perlakuan dengan dosis masing-masing 0 mL/L (kontrol), 1 mL/L, 1,5 mL/L dan 2 mL/L. Parameter yang diamati adalah waktu sedatif, waktu induktif, kelangsungan hidup dan kualitas air. Hasil penelitian menunjukkan bahwa pada perlakuan 2 mL/L merupakan waktu sedatif 15,5±0,72(P< 0,05), waktu induktif 12,25±0,42 (P< 0,05) dan kelangsungan hidup 93,33±0,27 (P< 0,05) yang terbaik serta kualitas air yang normal.This research was conducted to determine the effectiveness of using fish killer fruit extract as an anesthetic in carp fingerlings. Extract fish killer fruit was used as a treatment with doses of 0 mL/L (control), 1 mL/L, 1.5 mL/L and 2 mL/L, respectively. Parameters observed were sedative time, inductive time, survival and water quality. The results showed that the 2 mL/L treatment was a sedative time of 15.5±0.72 (P<0.05), an inductive time of 12.25±0.42 (P<0.05) and survival was 93.33. ±0.27 (P<0.05) the best and normal water quality

Performance Analysis of 4-DOF RPRR Robot Manipulator Actuation Strategy for Pick and Place Application in Healthcare Environment

Direct and indirect physical contact of humans and objects become the main medium of transmissible diseases such as COVID-19. Some strategies have been proposed to mitigate the risks of infections by minimizing physical contact, such as using robotics technology. Tele-robotics is one of the sub-fields in robotics that aims to implement physical surrogates for monitoring and controlling robots from remote distances, either autonomous, semi-autonomous, or manually guided. This paper discusses experimental research for evaluating the performance of a 4-DOF robot manipulator for pick and place tasks on small medical objects, such as test tubes in table-top scenarios. The robot manipulator is designed as an RPRR manipulator and is equipped with a gripper attached to its end-effector. Inverse kinematics and trajectory planning methods have been successfully implemented in real-time. The inverse kinematic method utilizes a pseudo-inverse Jacobian solver, and the trajectory generation utilizes a sigmoid function. The performance analysis results show that pick and place missions have been demonstrated with minimum tolerable position error, which is not more than 3.5 mm. The robot manipulator can satisfy high precision during repetitive experiments and maintain its accuracy in picking and placing standard test tubes from one rack to another within its working space. The smooth trajectories of the end-effector are achieved by implementing the sigmoid function. Thus, it satisfies the requirement for handling objects with minimum vibrations even during the actuation process with maximum speed