INFLUENCE OF PEAT WATER ON MECHANICAL PROPERTIES OF COCONUT SHELL AND FLY ASH BASED CONCRETE

This study aimed to determine the influence of peat water on the mechanical properties of the paving block (compressive strength and water absorption) using coconut shell waste and fly ash as raw material. The background of the research were the lack utilization of fly ash, preparation for the handling and utilization of fly ash from power station at Pulang Pisau and Tumbang Kajuei (under construction), and the utilization of coconut shell to be more effective and economical. Paving block specimens were immersed in peat water to determine the effect of peat water and the rest were immersed in plain water. This experiment used fly ash as a partial replacement of cement and 2% coconut shell as a partial replacement of fine aggregate. The results of the analysis showed that: (a) Paving block using fly ash and coconut shells which were immersed in plain water experienced the increase in compressive strength and the decrease in water; (b) Paving block using fly ash and coconut shells soaked in peat water showed that by the increase of age, compressive strength was decrease and water absorption was increase; (c) The compressive strength of paving block specimens immersed in plain water and peat water showed relatively similar values at 7 and 28 days age, (d). Water absorption in paving block specimens soaked both in plain water and peat water showed relatively similar values at 7 days age, but at 28 days age the specimens immersed in peat water had greater water absorption

METAL WELDING TRAINING FOR SKILLS PROVISION FOR MECHANICAL ENGINEERING EDUCATION STUDENTS, PALANGKA RAYA UNIVERSITY

Community empowerment activities in general aim to form individuals and communities to become independent. Independence is a condition experienced by a person which is characterized by the ability to think, decide and do something that is deemed appropriate in order to achieve solving the problems faced by using the power/ability possessed. The training activities aim to equip participants with metal welding skills. The activity was carried out at the Mechanical Engineering Education Laboratory, FKIP UPR. The purpose of these activities is in line with the higher education functions and objectives mandated in Law no. 12 of 2012 Article 4 paragraph 3; namely to "Develop Science and Technology by paying attention to and applying the values of Humanities". With this activity, it is hoped that participants will have more knowledge about metal welding. The training methods used are lectures with presentation techniques, direct guided practice and evaluation

OPTIMIZATION MODEL FOR USING WATER FLOW IN HYDRAM PUMP STORAGE BARRELS AS A SOURCE OF SUSTAINABLE ELECTRICITY GENERATION ON A LABORATORY SCALE

Currently, energy needs are increasing greatly, this is influenced by increasing population growth and human activity. The development of simpler renewable energy must be encouraged to meet energy needs, at least to meet the domestic energy needs of households. A hydram pump is a tool that can utilize water flow to produce kinetic energy which is then converted into potential energy to lift water to a certain height. This potential energy can be converted into electrical energy through a generator. A hydram pump is a tool used to raise water from a low place to a higher place automatically with energy originating from the water itself, namely because of the height of the falling water which is used to press the valve on the hydram pump and result in a water hammer when the water is stopped automatically. suddenly, then the change in momentum of the fluid mass will also increase the pressure suddenly. This research was carried out at the Mechanical Engineering Education Laboratory at Palangka Raya University with the methods described which will include experimental steps, data collection and analysis to be carried out. This research aims to develop an optimization model for the use of water flow in the hydram pump reservoir as a source of sustainable electricity generation on a laboratory scale. The results of this research have been carried out 4 times with the height of the turbine from the bottom of the experimental floor being 3 m while the size of the exhaust valve opening is ± 4 cm and the height of the water plunge from the barrel to the hydram pump is 2 m; 1.5m; 1.2 m is able to produce stable turbine rotation so that the lights come on. However, at a height of 1 m from the barrel to the hydram pump, the turbine rotation produces dim lights

Persepsi Guru dan Siswa terhadap Pembelajaran Tatap Muka (PTM) Terbatas pada Masa Pandemi Covid-19 Sekolah Dasar di Pinggiran DAS Sungai Kahayan SDN-1 Desa Hanua, Kabupaten Pulang Pisau

Many students feel bored studying online due to the impact of the Covid 19 pandemic since March 2020 because they cannot interact directly with their teachers and friends. On March 30, 2021, 4 Ministerial Joint Decrees (SKB) were issued, namely the Minister of Education and Culture, Minister of Religion, Minister of Health and Minister of Home Affairs Number 03/KB/2021, Number 384 of 2021, Number HK.01.08/MENKES/4242/ 2021, Number 440-717 of 2021 concerning Guidelines for Organizing Learning During the 2019 Coronavirus Disease (COVID-19) Pandemic. Through this joint decision, the government encourages limited face-to-face learning (PTM) acceleration while still implementing strict health protocols. Since the publication of the Joint Decree of 4 ministers concerning Guidelines for Organizing Learning During the 2019 Corona Virus Disease (COVID-19) Pandemic, many schools have conducted face-to-face learning. A limited face-to-face learning process has been carried out from mid-July 2021 until now. Limited Face-to-Face Learning (PTM) was carried out in one of the elementary schools at SDN-1 in Hanua Village, which is located on the outskirts of the Kahayan River watershed, Pulang Pisau Regency. This school as a whole has 8 teachers and 33 students, which in the implementation of limited PTM are scheduled from the school. The type of research used is a descriptive qualitative research approach. The place where the research was carried out at the research subject was a source for obtaining information and information from the research desired in this study. The subjects were teachers and high school students at SDN-1 Hanua Village, Pulang Pisau Regency. From the results of observations and interviews with teachers and students, it was found that according to teachers' perceptions they strongly agreed with limited PTM during the pandemic because it was more effective in using direct learning methods and resources to students so that it was easier to coordinate learning in class than online because it is indeed a network in the village not smooth so that it becomes an obstacle to online meetings. Meanwhile, according to student perceptions, they stated that students were very happy with limited face-to-face meetings during the pandemic because they could interact with their friends and felt comfortable studying at school, conducting learning in question and answer classes and understanding better the lessons given by the teacher in class.Banyak siswa yang sudah merasa bosan belajar online akibat dampak masa pandemi Covid 19 sejak bulan Maret 2020 karena tidak bisa berinteraksi langsung dengan guru dan teman-temannya. Pada tanggal 30 Maret 2021 diterbitkan Surat Keputusan Bersama (SKB) 4 Menteri yakni Menteri Pendidikan dan Kebudayaan, Menteri Agama, Menteri Kesehatan dan Menteri Dalam Negeri Nomor 03/KB/2021, Nomor 384 Tahun 2021, Nomor HK.01.08/ MENKES/4242/2021, Nomor 440-717 Tahun 2021 tentang Panduan Penyelenggaraan Pembelajaran di Masa Pandemi Coronavirus Disease 2019 (COVID-19). Melalui keputusan bersama tersebut, pemerintah mendorong akselerasi pembelajaran tatap muka (PTM) terbatas dengan tetap menjalankan protokol kesehatan yang ketat.  Sejak terbitnya Surat Keputusan Bersama 4 menteri tentang Panduan Penyelenggaraan Pembelajaran di Masa Pandemi Corona Virus Disease 2019 (COVID-19) sudah banyak sekolah yang melakukan pembelajaran tatap muka. Proses pembelajaran secara tatap muka terbatas telah dilakukan dari pertengahan bulan Juli 2021 sampai sekarang. Pembelajaran Tatap Muka  (PTM) Terbatas dilaksanakan di salah satu sekolah dasar SDN-1 Desa Hanua yang terletak di pinggiran DAS Sungai Kahayan, Kabupaten Pulang Pisau. Sekolah ini secara keseluruhan memiliki 8 guru dan 33 siswa-siswi, yang dalam pelaksanaan PTM terbatas dilakukan terjadwal dari sekolah. Jenis penelitian yang digunakan adalah pendekatan penelitian kualitatif deskriptif. Tempat penelitian dilakukan di subyek penelitian merupakan sumber untuk memperoleh informasi dan keterangan dari penelitian yang di inginkan dalam penelitian ini yang menjadi subjek ini adalah  guru dan siswa kelas tinggi di SDN-1 Desa Hanua Kabupaten Pulang Pisau. Dari hasil observasi maupun wawancara dengan guru dan siswa maka didapatkan hasil  bahwa menurut persepsi guru sangat setuju dengan PTM terbatas selama pandemi karena lebih efektif dalam menggunakan metode dan sumber belajar langsung kepada siswa sehingga lebih mudah mengkoordinir pembelajaran di kelas daripada secara daring karena memang jaringan di desa tidak lancar sehingga menjadi penghambat pertemuan daring. Sedangkan menurut persepsi siswa menyatakan bahwa siswa sangat senang pertemuan tatap muka terbatas selama masa pandemi karena dapat berinteraksi dengan teman-temannya serta merasa nyaman belajar ke sekolah melakukan pembelajaran di kelas tanya jawab dan lebih mengerti pelajaran yang diberikan guru di kelas