Abstrak: Salah satu media pembelajaran utama yang digunakan dalam sistem pendidikan anak usia dini ialah Alat Permainan Edukatif (APE). APE akan menunjang keberhasilan proses belajar melalui pengembangan aspek motorik halus dan kasar yang dilakukan pada area bermain indoor maupun outdoor. APE indoor dapat dipenuhi melalui pembuatan sendiri dari bahan yang tersedia di sekitar, sedangkan APE outdoor sebagian besar membutuhkan alat bantu pabrikasi yang harganya relatif mahal. Tujuan utama penyediaan APE outdoor adalah untuk meningkatkan kreativitas, keterampilan fisik, rasa percaya diri, daya nalar, kemampuan bersosialisasi dan meningkatkan motivasi belajar siswa. Ketersediaan APE outdoor pada PAUD Bina Cendikia Malang masih sangat terbatas sehingga program kegiatan belajar untuk mengembangkan aspek motorik siswa kurang optimal. Selain itu diperlukan peningkatan pemahaman tentang keselematan bermain bagi anak agar guru dan wali siswa dapat memastikan kegiatan bermain berlangsung dengan aman, menarik, menyenangkan, dan minim resiko. Hasil kegiatan pengabdian pada masyarakat pada PAUD Bina Cendikia dapat meningkatkan kualitas pembelajaran.
Alat peraga merupakan salah satu bentuk media ajar yang mempunyai peran penting dalam metode pembelajaran. Fasilitas pembelajaran di MI Mambaul Hidayah masih tergolong minim sehingga perlu adanya penyediaan alat peraga. Pengabdian pada masyarakat ini bertujuan untuk menyediakan dan melatih penggunaan alat peraga khususnya pada mata pelajaran sains dan matematika di MI Mambaul Hidayah Kabupaten Malang. Tahapan pengabdian meliputi survei, koordinasi, penyediaan, pelatihan dan simulasi pengajaran, serta evaluasi dan serah terima alat peraga. Hasil kegiatan pengabdian setelah simulasi pengajaran dengan menggunakan alat peraga sains dan matematika menunjukkan guru semakin mudah untuk menjelaskan materi dengan berbagai contoh yang aplikatif. Siswa juga semakin antusias praktik menggunakan alat peraga dan lebih mudah untuk mengerti dan memahami materi.
Jamur tiram (Pleurotus ostreatus) merupakan jamur kayu yang tumbuh berderet menyamping pada batang kayu lapuk. Sterilisasi merupakan proses budidaya jamur tiram. Sterilisasi digunakan untuk membunuh mikrooganisme pengganggu yang dapat menghambat pertumbuhan jamur. Boiler adalah salah satu mesin yang memanfaatkan uap air panas untuk proses sterilisasi baglog. Boiler diisi air lalu dipanaskan agar hingga mencapai suhu 80°C - 110°C, lalu uap air akan disuplai ke steamer untuk proses sterilisasi. Sistem pengaturan suhu boiler pada sterilisasi baglog dengan metode kontrol PI ini bertujuan untuk menjaga suhu agar tetap pada set point. Alat ini memudahkan seseorang untuk memonitoring suhu dalam boiler tanpa harus khawatir jika ada kesibukan yang lainnya. Alat ini dilengkapi dengan sensor suhu thermocouple K untuk membaca suhu pada boiler, dan motor DC digunakan untuk mengontrol putaran pada katup kompor yang mengatur besar kecilnya api pemanas, lalu LCD 16X2 untuk menampilkan suhu terbaca pada boiler yang dihubungkan ke Arduino UNO R3 sebagai mikrokontroler.
Amorphous Silicon type solar panels, which had a bad reputation in the past, are now considered very reliable, with several significant advantages over Mono Crystalline and Polycrystalline solar panels. Research on the effectiveness of the capture power of Amorphous Silicon compared to Silicon Crystalline solar panels types is still not much done.The purpose of this study was to explain the effect of solar radiation on the capture power of polycrystalline and amorphous solar panels.This research method includes solar panel installation, measurement of solar radiation, measurement of the resulting current and voltage, data analysis, discussion, and conclusions. The independent variables of the study were the resulting current and voltage, and the type of solar panels (Polycrystalline and Amorphous). The dependent variable of this research are actual power and efficiency.The results showed that the greater the solar radiation, the higher the actual power and efficiency produced by the solar panels. Polycrystalline type solar panels are capable of producing higher average actual power and average efficiency, namely 86.83 W and 11.92%, compared to amorphous solar panels, namely 43.88 W and 6.01%. Keywords: Monocrystalline, Polycrystalline, Normalized Power Output Efficiency, Performance Ratio
Proses pengelasan telah berkembang pesat saat ini, baik untuk material logam maupun non logam. Salah satu material non logam yang disambung dengan proses pengelasan adalah plastik. Pada saat ini penggunaan produk berbahan material plastik semakin meningkat, maka untuk proses pengelasan material plastik menggunakan metode Hot-Gas Welding (HGW). Diketahui bahwa dalam proses pengelasan konduktifitas material sangat mempengaruhi kwalitas sambungan las, semakin tinggi konduktifitas maka kwalitas hasil pengelasan akan semakin baik. Di sisi lain diketahui bahwa material plastik memiliki tingkat konduktivitas yang rendah, maka dalam proses pengelasan plastik tersebut akan menjadi kendala. Tujuan dari penelitian ini adalah melakukan studi untuk meningkatkan kwalitas sambungan las material plastik yang dikhususkan pada material HDPE, yaitu mengetahui pengaruh temperatur pelat-landasan pada Jig Hot-Gas Welding dan sudut V-groove terhadap kekuatan tarik sambungan las HDPE sheet. Metode penelitian yang digunakan adalah eksperimental dengan variasi temperatur pelat landasan 30°C, 70°C, 110°C, dan 150°C, sedangkan variasi sudut V-groove yang digunakan 40°, 60°, dan 75°. Standar uji tarik mengunakan standar ASTM D 638-03, sebagai data penunjang dilakukan foto makrostruktur dari masing-masing sambungan las. Hasil penelitian ini diperoleh temperatur pelat landasan dan sudut V-groove berpengaruh tinggi terhadap kekuatan tarik lasan HDPE sheet selama proses hot-gas welding. Hasil interaksi antara variasi temperatur pelat landasan dan variasi sudut v-groove diperoleh bahwa pada temperatur pelat landasan 150°C dan sudut V-groove 60° didapatkan nilai maksimum kekuatan tarik lasan 18,8 MPa atau 87,5% terhadap kekuatan tarik material HDPE sheet tanpa sambungan.
This research proposes a new model of overlap and helix blade shape. The overlap shape of the blades gives room to the air flow shortly after pounding the blades. Air flow direction is strived to be able to push the next blade so that the process of the turbine blade rotation becomes more effective. While the helix model is expected to produce a more efficient turbine rotation due to its multilevel shape. The wind speeds tested were 2 m / s, 4 m / s, and 6 m / s. Turbine speed rotation data retrieval is carried out at each additional time. The overlap blade has a greater angular velocity value of 9.4 rad / s at 2 m / s wind speed, 21.9 rad / s at 4 m / s wind speed, and 29.8 rad / s at 6 m / s wind speed.Turbines with multilevel helix blades have a higher level of stability compared to overlap blades. This is because there are two levels of turbine blades which have an angle difference of 600 which can receive more stable wind collisions. However, due to the smaller cross-sectional area of the helix blade turbine (ie 50% of the overlap blade) the effective impact area on the blade is also getting smaller. So that the energy that can be converted is also relatively smaller than the overlapping blade.
Transportation of oil and gas through oil refinery pipelines is faced with problems, including corrosion problems. Corrosion is a natural phenomenon that occurs in metal materials, where corrosion is a process of material damage due to chemical or electrochemical reactions with its environment. The purpose of this study is the results of the analysis of HydroTest pressure variations on the Welding Joints of Carbon Steel Pipes (carbon steel) A106 Gr.B. In the study did not discuss the occurrence of corrosion and other tests, while the welding process in detail was shown in WPS. This experimental research method uses the Welding Repair Method on welded joints according to the ASME IX, ASME B31.3 standard. The research material is A106 GR carbon steel pipe. B is in the form of a U Tube Seal Deck that has undergone corrosion and damage, where later the fabrication process (pipe repair) especially welding (using SMAW and GTAW) has been determined in PQR and WPS (WPS / CS / EM / ASME / WPxxx). The focus of this research is on stage 9 (hydro testing stage) of the Welding Repair method. Free variables in pressures of 240 Psi, 435 Psi, 690 Psi, and 910 Psi, which have been planned based on the thickness and length of the Pipe joint. Variable fixed temperature test Hydrotest 28OC, holding time holding time (pressurizing) 10 minutes and holding time peak 60 minutes before (depressurizing). The results were obtained that the pressure change was divided into two stages, pressurizing with the highest pressure of 915 Psi is the 4th pressure variation this was obtained from the test observation that there were no leaks in the welded joints and pipe materials in accordance with the acceptance criteria. While the second stage is (depressurizing) with a decrease in pressure or called realese, where successively realese 100%, 75%, 50%, 25%, and 0% at pressures of 915 Psi, 690 Psi, 435 Psi, 240 Psi, 0 Psi with the results of no leakage and observation test results in accordance with the acceptance criteria. So it can be concluded that the welded joints of carbon steel pipes tested using hydrotest, no deformation occurs, there is no change in shape and there are no leaks in the welded joint layer of A106 Gr.B carbon steel pipe
During the installation process, copper pipes for air conditioning will experience a very large deformation due to straightening and bending following the installation path. Hardening strains occur that result in changes in mechanical properties in this case decreases ductility making it difficult to do the connecting process with flaring. Studies need to be carried out to restore the mechanical properties of copper pipes that have been used, including the heat treatment process on copper pipes, so that used copper pipes have a better benefit value than having to be recycled. The temperature of the heat treatment is varied from 400oC, 500 oC and 600 oC. Tensile test results show that at annealed temperature of 400 oC has the highest tensile strength of 125.81 N / mm2 and proportional limit stress of 40.52 N / mm2. Whereas in the microhardness test, the highest hardness occurs also at annealed temperature of 400 oC which is equal to 50.8 HV.
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