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The PT Freeport Indonesia Grasberg mine in Papua, Indonesia is composed of the Grasberg open pit and four underground mine operations. The Deep Mill Level Zone (DMLZ) is one of the currently active block cave underground operations. The DMLZ orebody presents a number of significant engineering challenges and technical risks when compared to other operating block caves. Due to its mining method and the depth of the operation (+1,500 m), mining-induced seismicity was identified as one of the key factors that will affect the rock mass stability. The seismic system is one of the main tools that is used to track and understand the rock mass response for this cave propagation. This paper presents initial results from the DMLZ, and includes details about the rock properties, seismic system optimisation using blast data, and seismic analysis examples to help aid in the safety and productivity of the block cave operation.

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Information system technology has been applied to all organizations, both organizations and non-profits, even though the development of information technology has been felt by the education sector. Slowly technology began to replace some of the work and activities carried out by humans. However, today's technology is still not perfectly applied. This study tries to get an idea of how the participants respond using computer technology in carrying out their exam process or better known as the Computer Based Test (CBT) based exam. Respondents were selected as many as 100 people who are willing to fill out the research questionnaire. To get good analysis results, this study uses a problem-solving method, namely by using the Unified Theory Acceptance and Use of Technology (UTAUT) with various constructs. As a result, the UTAUT method explains the acceptance of CBT users with the business expectation performance (PE) construct which has a significant effect on the acceptance and use of a system (BIUS). To measure the level of variation in the change in the independent variable on the dependent variable or the highest R-Square value in the UTAUT method is 73%. From these results it can be concluded that the UTAUT method is the best method used in this case study research.

Keterlambatan pengembalian berkas rekam medis merupkan hal yang sangat erat kaitannya dengan motivasi perawat, perawat dalam mengisi dan melengkapi berkas rekam medis pasien harus lengkap sehingga tidak terjadi keterlambatan pengembalian berkas rekam medis rawat inap 2x24 jam menjadi 3x24 jam. Penelitian ini bertujuan untuk mengetahui hubungan motivasi perawat dengan keterlambatan pengembalian berkas rekam medis rawat inap di rumah sakit santa Elisabeth medan tahun 2022. Rancangan penelitian analitik dengan menggunakan pendekatan cross sectional.  Sampel dari penelitian ini sebanyak 57 perawat teknik pengambilan sampel adalah total sampling. Instrument yang digunakan adalah kuesioner. Analisa data dengan menggunakan uji chi-square. Hasil penelitian diperoleh motivasi perawat baik sebanyak perawat dengan motivasi tinggi  sebanyak 11 orang (19,3%), keterlambatan pengembalian berkas rekam medis berada pada kategori tepat sebanyak 11 berkas (19.3%). Hasil uji chi-square diperoleh p-value 0,004 (p<0,05) hal ini menunjukan ada hubungan yang signifikan antara motivasi perawat dengan keterlambatan pengembalian berkas rekam medis rawat inap di rumah sakit santa elisabeth medan tahun 2022. Diharapkan kepada pihak rumah sakit agar meningkatkan motivasi perawat dalam mengembalikan berkas rekam medis dengan tepat waktu.