The need for low carbon steel plate sheets with relatively thin thickness measurements in Indonesia is currently quite high, especially in supporting the automotive industry, the electronics industry, the food industry, beverages, and household appliances. To fulfill this, raw materials for low carbon steel plate sheets that have high formability and are not easily cracked in critical areas of the desired model are required. For this reason, research on the effect of temperature variations in heat treatment on hardness, microstructure and spring back of V-bending results on steel plates with a plate thickness of 0.8 mm. The research method used was a laboratory experimental method. The heat treatment is carried out with temperature variations of 710, 820 and 9300C with a holding time of 60 minutes. Tests carried out on specimens are hardness testing, microstructure testing, and spring back V-bending results on steel plates. The results of this study indicate a decrease in the spring back angle where the smallest spring back angle in the bending process is on the 9300C plate which is 1,040. The value of the hardness results from V-bending has increased significantly. The increase in the value of hardness because the plate has an atom shift or dislocation by shear stress (slip) due to plastic deformation on the plate. The highest hardness value is on the 7100C plate which is 154.67 HV or has an increase of 14,291% of the pre-bending plate. The lowest hardness value is on the 9300C plate which is 125.33 HV, its hardness increases 4.4% against the pre-bending plate. Heat treatment also causes changes in the microstructure of the plates from the process of regulation and reshaping of crystals to the growth of new grains which have implications for changes in mechanical properties and formability of the workpiece.
In learning physics, the problem that arises is a lack of physics conceptual understanding in contextual learning. These problems are due to the absence of innovative and creative learning resources that can be used to learn by the students. One of the learning resources that can be used is a dictionary. moPhyDict (mobile physics dictionary) is a dictionary containing explanations of concepts and illustrations (images, videos, animations) in a language that is easily understood by students. This study specifically aims to test the effectiveness of Mobile Learning: moPhyDict to improve student’s physics conceptual understanding. The method employed in this study was a quasi-experiment design. The experimental design used a pretest-posttest control group design. The sample of the study was 60 students from senior High School, which divided into control group and experiment group. The instrument test in this study used conceptual multiple choice question. Based on the t-test on the control class and the experimental class, it can be inferred that there is a significance score of 0.031. These results are supported by data: (1) the average score of the ability to understand the concept of the control class who did not use moPhyDict increased from 37.4 to 55.46, and (2) the average score of the conceptual understanding of the experimental class who used moPhyDict increased from 40.87 to 74.33. It was concluded that moPhyDict is effective to improve physics conceptual understanding of High School Students.
The Ministry of Tourism and Creative Economy again held a Tourism Village Community Empowerment Program. The collaboration between the Ministry of Tourism and Creative Economy, the Ministry of Villages for Disadvantaged Regions, and Transmigration and Higher Education is one of its forms. Higher education institutions are required to carry out community service programs. One of these activities is in the form of human resource development activities involved in the management of tourism villages, namely Pokdarwis (Tourism Awareness Group). One of the human resource developments carried out is the strengthening of CHSE (Clean, Health, Safety, and Environmental Sustainability) materials. CHSE is a new program that is being socialized by the Ministry of Tourism and Creative Economy to encourage healthy and safe tourism activities in all tourism destinations. Also, with the existence of correct and adequate CHSE and health protocols, it becomes one of the attractions for tourists to visit tourist villages. This activity was attended by 25 participants from Pokdarwis (Tourism Awareness Group), Sungai Awan Kiri Tourism Village, Ketapang, West Kalimantan. This activity aims to improve the competence of human resources for managing the Sungai Awan Kiri Tourism Village which is closely related to CHSE, K3, and the implementation of health protocols that must be implemented in the New Normal era in tourist villages.
The effect of the addition of rice husk ash (rice husk ash) to the K-175 formula quality concrete mixture, as an aggregate mixture to the concrete compressive strength test using a Compression Testing Machine to get the compressive strength value of concrete and can be used as an alternative material as an additional material in making concrete in improving the quality of building construction. The study uses K-175 concrete quality characteristics as a test material. Test object in the shape of a cube with a size of 15cm x 15cm. With 4 variations in levels of addition of rice husk ash by 0%, 1.5%, 3.5%, and 5% by weight of cement. The husk ash used is the husk ash that escaped the 2.36 mm filter size. From each type of mixture made 9 test specimens, every 3 specimens for the age of concrete 7 days, 14 days and 28 days. Concrete mortar design using ASTM method. With material sources using fine aggregate from the Pawan Ketapang River and coarse aggregate from Merak, Banten. Stages of implementation include examining the nature of aggregate materials, sample making, and testing of concrete compressive strength.
Sekolah yang berada di daerah terpencil memiliki masalah pendidikan yang kompleks seperti terbatasnya tenaga guru, kondisi gedung yang tidak layak, akses jalan yang sulit bahkan kurangnya buku pelajaran. Pengabdian ini bertujuan untuk membantu SD N 1 Tumbang Kuling Kalimantan Tengah dalam menyelenggarakan kegiatan belajar mengajar yang lebih variatif menggunakan beberapa metode pembelajaran. Tim Pengabdian Masyarakat memperkenalkan metode tebak gambar, Team Games Tournament, menyanyi dan Numbered Head Together pada para siswa untuk memotivasi mereka dalam belajar di tengah keterbatasan yang dimiliki. Siswa-siswa dapat mengikuti proses pembelajaran yang diberikan dengan baik dan merasa senang dapat belajar melalui metode yang ada. Kegiatan pengabdian semacam ini dapat menjadi inspirasi bagi masyarakat untuk membantu pemerintah dalam mengatasi persoalan kesenjangan pendidikan di sekolah yang ada di daerah terpencil.
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