This study aims to obtain an overview of the blended learning program for physics subjects in mechanical wave material during the covid-19 pandemic, and to find out the supporting factors and obstacles so that they can be projected into solutions that are adaptive to the needs, availability and skills of students. The research method used is qualitative with an evaluative approach to the CSE-UCLA model. The subjects of this study were students of class XI IPA-1 and XI IPA-2, totaling 64 people at SMA Negeri 1 Timpah, Timpah Village, Central Kalimantan, Indonesia. Data were collected through questionnaires, interviews, observation and documentation. The data analysis procedure used Milles & Hubberman model analysis, including data reduction, data presentation, and drawing conclusions. Furthermore, the data and research findings were triangulated to check the validity of the data. The results of the program evaluation research from system assessment components, program planning, program implementation, improvement programs, and certification programs overall show that the physics blended learning program at SMA Negeri 1 Timpah supports the government’s policy in responding to the COVID-19 outbreak to learn from home, which is relevant to the supporting factors and obstacles.
Abstract—From year to year technological improvement is guite significant, it is also marked by the emergence of various kinds of technology, especially the balance sheet. In the balance sheet needs calibration. Calibration is usually done by comparing standards that are linked to national standards as well as international standards and certified reference materials. Metrological board and the government perform the calibration process within a predetermined time frame in order to minimize the occurrence of scales deviations. To see the results of the three balance sheets taking samples, comparing the three sample types to see the guality and guality of the balance sheet so that it will clear the balance sheet efficiently and inefficiently.Intisari—Dari tahun ke tahun peningkatan teknologi cukup signifikan, hal ini di tandai dengan munculnya berbagai macam teknologi khususnya neraca. Dalam neraca tersebut dibutuhkan pengkalibrasian, kalibrasi biasa dilakukan dengan membandingkan suatu standar yang terhubung dengan standar nasional maupun internasional dan bahan-bahan acuan tersertifikasi. Badan metrologi dari pemerintah melakukan proses kalibrasi dalam jangka waktu yg telah di tentukan guna meminimalisir terjadinya penyimpangan timbangan. Untuk melihat hasil dari ketiga jenis neraca, maka perlu dilakukan pengambilan sampel, membandingkan ketiga jenis sampel tersebut guna untuk melihat mutu dan kualitas neraca, sehingga dengan begitu akan tampak jelas neraca mana yang sangat efisien dan yang tidak. Studi Kelayakan Neraca Mesin Packing Pada Pengantongan Semen Di PT. Semen Tonasa ini merupakan suatu pertimbangan dalam pemilihan timbangan yang mengacu pada kemajuan teknologi yang lebih efisien baik dalam proses kalibrasi, pengoperasian, perawatan maupun keakurasiannya. Tingkat keakurasian suatu timbangan dapat dilihat dari pengecekan timbangan secara berkala, sehingga disimpulkan bahwa neraca IQ-Plus dan Redlion lebih baik daripada neraca Haverboecker, tetapi jika ingin alat dan bahan yg mudah didapatkan dan tentunya lebih mudah pengerjaannya maka Redlion merupakan pilihan yang tepat.
Lighting is a factor to get a safe and comfortable environment. Good lighting allows one to see objects that are done clearly, and can give a refreshing view. Conversely, if the room has poor lighting can cause eye fatigue, therefore it is necessary to control the intensity of light-based microcontroller to regulate the lighting of a room automatically. his research was made by designing a lighting model using a dimmer circuit based on ATMega328 microcontroller, LDR sensor (Light Dependent Resistor) and Bluetooth HC-06. The working principle of the LDR sensor is receiving light from the outside which causes changes in the input voltage level to the microcontroller while the Bluetooth HC-06 works by connecting a Bluetooth device with a smartphone that has installed the PWM Light Control application. which is then processed by microcontroller output in the form of pulse voltage (PWM) in the dimmer circuit to adjust the dim and bright lights. Results for electricity voltage (Volt), Electricity (Ampere), Light level (Lux) and electrical power used. At each increase from 0-255 PWM which is channeled to the dimmer circuit, the power is 0-13,0357 watts, comparable to before using a circuit of around 13,5036 watts with a percentage of 1. 7% with a 15-Watt lamp, the light conditions are stable in brightness. The distance of control of this tool reaches 26. 15 m with 1 barrier wall and still works with 3 barrier walls with a distance of 21. 45 m. So that the use of electric power and light can be adjusted to the needs.
Sistem proteksi merupakan sistem perlindungan terhadap manusia, peralatan serta bangunan di sekitar area yang dilindungi.Tujuan yang hendak dicapai dalam penelitian ini adalah untuk merancang sistem proteksi terhadap akibat yang ditimbulkan oleh kebocoran gas LPG berbasis mikrokontroler ATMega16. Metode yang digunakan dalam penelitian ini adalah mengurangi kadar LPG yang bocor serta mematikan sumber listrik saat kebocoran LPG diambang batas ledak. Perancangan sistem proteksi ini bekerja akurat di antara 200 ppm sampai dengan 10000 ppm. Yang masih dibawah ambang batas ledak. Sehingga dapat memproteksi secara dini akibat yang akan ditimbulkan pada kebocoran gas LPG. Dengan system smartphone dapat mengontrol system meskipun pemlik berada diluar rumah.
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