Two models of Artificial Neural Network (ANN) algorithm have been developed for monthly rainfall prediction, namely the Backpropagation Neural Network (BPNN) and Radial Basis Function Neural Network (RBFNN). A total data of 238 months (1994-2013) was used as the input data, in which 190 data were used as training data and 48 data used as testing data. Rainfall data has been tested using architecture BPNN with various learning rates. In addition, the rainfall data has been tested using the RBFNN architecture with maximum number of neurons K = 200, and various error goals. Statistical analysis has been conducted to calculate R, MSE, MBE, and MAE to verify the result. The study showed that RBFNN architecture with error goal of 0.001 gives the best result with a value of MSE = 0.00072 and R = 0.98 for the learning process, and MSE = 0.00092 and R = 0.86 for the testing process. Thus, the RBFNN can be set as the best model for monthly rainfall prediction.

Turbin crossflow dikelompokkan dalam  jenis turbin skala mikro dengan rentang tinggi jatuh efektif aliran dibawah 30 m, dengan sudut peletakan turbin maksimal 30o. Kajian penelitian ini bertujuan untuk menganalisis karakteristik turbin crossflow kapasitas 5 kW. Metode penelitian kasus berdasarkan pengumpulan data pada objek kajian. Kesimpulan yang disarikan dari kajian penelitian tersebut berupa kecenderungan kenaikan putaran poros turbin berbanding dengan penambahan kecepatan alir fluida. Fenomena ini cukup signifikan dengan karakteristik kurva turbin crossflow. Indikasi perubahan daya terbangkitkan yang diakibatkan oleh perubahan putaran pada poros turbin yang beragam disebabkan oleh heterogenitas aliran pada saluran pembawa. Karakteristik mekanis menghasilkan putaran sebesar 256,30 rpm dan daya yang terbangkitkan pada turbin sebesar 4,88 kW.

The teacher is a professional educator with the task of educating, teaching, guiding, directing, training, assessing, and evaluating students in early and secondary education in certain formal institutions. One of the problems faced by Al-Hamidiyah Middle School teachers is the low competency of teachers, especially in the use of computer technology devices. This is unfortunate, even though the demands on teachers' assignments are in line with the enactment of the 2013 curriculum, where teachers are required to work using applications, learning media using information technology, application-based assessment systems, computer-based national exams, and others. This obstacle occurs because there is still a lack of teacher motivation to add competence outside the main task for a variety of reasons conveyed. The approach used in this dedication activity with a persuasive-educative approach, by providing knowledge, understanding, and skills in using Microsoft Office. The method used in the form of lectures, practice, and discussion. The results of this dedication the teacher understands and is able to practice directly.

Research on the availability of water potential for the development of power plants with various scales and types of power plants has been done. Since most existing water sources have small discharges and low heads, this study aimed at designing a micro-hydropower center as one of the ways the electrical energy crisis could be avoided, with one of the renewable energy potentials, namely the potential energy of water in Micro Hydro Power Plant. Further studies were related to water resources to Micro Hydro Power Plants (MHPP) construction, especially Archimedes screw turbines guide parameters that corresponded to flow velocity, channel crosssection, and flow volume. It aimed to connect the local energy potential to the output power of the Archimedes screw turbine.The methods used for this study were 1. Observation 2. Data collection, and 3. Data Analysis. The study was carried out using an observation method that adopted field data collection techniques assisted by measuring equipment to collect data coverage that refers to related parameters. The power available on the channel resulted was 946 kW, and the power generated in the turbine was 5.9 kW.

Distance learning causes teachers to think creatively so that the teaching and learning process continues as it should. In addition, various platforms and media for online learning are still not widely known by teachers. The Whatsapp application is an application that is already widely used. In this application, it is possible to form groups that can gather many people to be able to chat with each other and exchange information that allows the delivery of messages in groups besides delivering messages individually. The purpose of this service is so that teachers can make maximum use of the Whatsapp media as a distance learning facility. The method in this service of AbdiMas team took the initiative to conduct a one day coaching clinic using the Whatsapp application as a means of evaluating student learning to SIT Mush'ab bin Umair teachers. The conclusion of this dedication activity is that this community service activity is felt to be very beneficial for the SIT Mush'ab bin Umair teachers. In part, the limitations of online learning facilities and infrastructure can be overcome by using Whatsapp. The use of Whatsapp as an online exam means is considered relatively cheap with a wide reach, easy to use, especially for most of the students of SIT Mush'ab bin Umair who are still in grades 1 and 2.