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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer (JURITEK)
Purbawati
Universitas Nahdlatul Ulama Kalimantan Timur
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Immunology & microbiology Veterinary

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ANALISIS CACAT CORAN PADA SAND CASTING PRODUK CLAMP SADDLE Mad Yusup; Purbawati
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol 2 No 2 (2022): Juli, Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Publisher : Sekolah Tinggi Ilmu Ekonomi Trianandra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juritek.v2i2.571

Abstract

Terjadinya cacat pada produk coran disebabkan bebrapa keadaan, antara lain: rancangan pengecoran, rancangan pola, pasir untuk cetakan, rancangan cetakan, rancangan inti, komposisi material logam, proses peleburan proses penuangan, susunan saluran masuk dan saluran penambah. Tujuan penelitian untuk mengetahui proses pengecoran produk clamp saddle, mengetahui jenis cacat yang terjadi pada produk clamp saddle, Memberikan hasil rekomendasi untuk mengurangi cacat yang terjadi pada produk clamp saddle. Pada analisis cacat cor untuk clamp saddle menggunkan diagram sebab akibat (fishbone diagrams) dan pemeriksaan rupa. Penelitian mendapakan kesimpulan : Berdasrakan pemeriksaan rupa hasil pengecoran clamp saddle cacat cor yang terjadi merupakan cacat pada permukaan yaitu kekasaran yang meluas, kondisi cacat seperti ini diakibatkan oleh pasir cetak yang tererosi. Ada beberapa bahan baku yang digunakan dalam pengecoran untuk pembuatan clamp saddle yaitu : skrap baja, skrap besi, carboriser adalah bahan tambahan kandungan karbon untuk besi tuang, biasanya kadar C dalam carboriser adalah sekitar minimal 90%. Berdasarakan hasil penelitian perlu dilakukan perbaikan dengan cara membuat standarisasi untuk membuat standar kualitas produk agar dapat didefinisikan jenis-jenis cacat produk pengecoran.
MONITORING FOREST AREA CHANGE USING QUICKBIRD SRI ENDAYANI; ANDREW STEFANO; FATHIAH; PURBAWATI; IDA ROSANTI
BIOTROPIA - The Southeast Asian Journal of Tropical Biology Vol. 29 No. 2 (2022): BIOTROPIA Vol. 29 No. 2 Agustus 2022
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2022.29.2.1690

Abstract

A study was conducted to compare the urban forest management in three urban forests in Samarinda City. The application of GIS (Geographic Information System) is one of the alternatives to conduct a variety of processes such as: providing geographical information system, identifying the areas of urban forests in Samarinda, helping to plan the process of map digitalization and performing overlay process. The main method used for the data analysis process on the map was the overlay process data analysis technique. The research findings showed that: 1) the appointment of urban forests as the initial step of urban forest development needed more implementation from the government; 2) the urban forest determination needed more socialization to the owner of the urban forest and the public in 1992 and 2019; 3) the urban forests needed more management. There were some similarities and differences in the management of urban forests in the three study locations. The similarities among the three locations were that the three locations had already met the minimum standards of one urban forest location even though there was still one location outside of these three locations which did not meet the minimum standard. The differences were in managing the urban forests. These differences indicated that the urban forest policy was not fully implemented in Samarinda City.
Co-Authors Fathiah Ida Rosanti Mad Yusup Mudinillah, Adam Sri Endayani