Jurnal Sains dan Teknologi ISTP

ANALISA KETERDAPATAN AKUIFER AIR BAWAH TANAH DENGAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DESA TUNTUNGAN II DUSUN I

Natalius Panjaitan, Bungaran Tambun, analiser halawa — Fri, 26 Jan 2024 00:00:00 +0700

Clean water is still a problem in the city of Medan and Deli Serdang Regency according to the North Sumatra Provincial government in the Medan area and its surroundings, the total need for clean water is 11,000 liters/second and an additional water supply of 4,000 liters/second is needed with water availability of 200 liters/second. So that the water supply in the Medan city area and its surroundings still lacks a water supply of 3,800 liters/second article sumutprov.go.id (https://sumutprov.go.id/artikel/artikel/resmikan-programmaster-meter-di-medan--gubernur--edy-rahmayadi-targetkan-tuntaskan--kebutuhan-air-bersih-di-akhir-periode) Besides that, in Tuntungan II Village, Hamlet I, Pancur Batu District, Deli Serdang Regency, there is no water channel from government institutions (PDAM) so that the community's water source in this area is obtained from water from wells/dug wells. this makes this research carried out. to interpret the presence of groundwater which can be used as a source of clean water in the research area conducted in Desa Tuntungan II , Dusun I, Kecamatan Medan Tuntungan, Kota Medan, North Sumatra Province. From the results of data processing, then interpretation of the data is carried out. Data interpretation is done by comparing the RMS table with the rules of the resistivity table of Suyono (1978), Astier (1971) and the geological map of the study area to determine the type of rock. The stratigraphy of the research location according to the resistivity value is thought to consist of 5 lithologies, namely Overburden (24.9-32.4Ω), andesite (1428-1473 Ω), clay (6.45-14.2Ω), andesite breccia (148-170 Ω), tuff (37.6 -74.6 Ω). The existence of a water-carrying layer (aquifer) at the point of measurement Point I is at a depth of around 14.8 – 76.1 meters. The predicted layer thickness is 61.2 m. The lithology of this layer is tuff as a water-carrying layer (aquifer). The existence of a water-carrying layer (aquifer) at Point II is at a depth of around 11.1 – 91.3 meters. The thickness of the layer is 80.2 meters. The lithology of this layer is a strong tuff as a water-carrying layer (aquifer).

ESTIMASI DAMPAK PROSES REDUKSI CONE CRUSHER TERHADAP FRAGMENTASI BATUAN DI CV. TAPIAN NAULI MALAU

Ridho Duno Putra Zebua, Sedarta Sebayang, Yunita K. Tambunan — Fri, 26 Jan 2024 00:00:00 +0700

Construction aggregates are generally rocks resulting from the mining process. Rock undergoes a size reduction process using rock crushing equipment called a crusher. The process of reducing its size is carried out in stages, starting from primary crushing, additional crushing (secondary crushing) and final crushing (thertiary crushing). The final stage of crushing is usually carried out using a cone crusher because it only reduces the size without crushing (Fuerstenau et all, 2009). This research was conducted at CV. Tapian Nauli Malau, Dusun Tappe-Tappe, Simpang Bage Village, Pamatang Silimahuta District, Simalungun Regency. The formulation of the problem in this research is what are the characteristics of the output product of tertiary crushing (cone crusher), what is its circularity and aspect ratio, and what is the impact of the process on grain size. The purpose of this study was to determine the characteristics of the tertiary crushing (cone-crusher) output product, aspect ratio, circularity and the impact of the process on grain size. The method used in this research is comparative analysis. The results of the study found that the average fragment size of the output cone crusher was 3.62 cm. But in the primary 19.00

cm, secondary 8.30 cm, and input cone crusher 6.00 cm. The shape of the cone crusher output fragment is angular (1.46), with low roundness (0.60). However, the primary output is 1.48 and the secondary is 1.47. The reduction ratio of cone crusher is 1.5. However, the reduction ratio for primary crushing is 4 and for secondary crushing is 2. The impact of the process on grain size at the output of a cone crusher that relies on scouring is that it does not change the shape of the fragments, they remain angular, including the degree of roundness.

OPTIMALISASI PRODUKTIVITAS ALAT GALI MUAT WHEEL LOADER 900 DAN 800 DALAM PENCAPAIAN PRODUKSI BATUBARA DI PT. BARA TABANG KUTAI KARTANEGARA – KALIMANTAN TIMUR

Mude Reza Saputra, Tengku Tibri, Azhari Fitrah — Fri, 26 Jan 2024 00:00:00 +0700

Bara Tabang is a company operating in the mining sector which is located in Pondok Pumpkin Village, Tabang District, Kutai Kartanegara Regency, East Kalimantan Province. The mining system used by PT. Bara Tabang is an open mining system (Surface Mining). Coal loading activities on the stockchrome (Coalpad) are carried out using a combination of Komatsu 900 wheel loader and Komatsu 800 wheel loader. This research aims to optimize production so that production that is not achieved can be achieved in the following year. In carrying out this research, the method used was the time barrier reduction method. Where in this method the author collects data by carrying out direct activities in the field, or data obtained from companies and others deemed necessary. In this research, theory and field data are combined to obtain a problem solving approach. With improvements in avoidable obstacle times, work efficiency has increased for the previous 900 wheel loader from 72.26% to 83.13%, while for the previous 800 wheel loader it was 73.47% to 84.41%. In carrying out mining activities, the production target for loading 900 wheel loaders and 800 weheel loaders is 4,000,000 MT/month. Achieving productivity in October with the number of tools working 6 units of Wheel loader 800 resulted in production results of 1,704,121 M/T/month, 3 units of Wheel loader 900 obtained production results of 2,595,542 M/T/month. So for 9 wheel loader units working, the production output was 4,299,663 M/T/month. This was done by improving work time constraints thereby increasing the work efficiency of the equipment by 10%.. Meanwhile, the comparison is based on calculations using the Talpac application for 3 900 wheel loader units of 1,893,600 M/T/month and for 6 800 wheel loader units of 2,883,600 M/T/month. So for 9 wheel loader units working the production output is 4,777,200 M/T/month

STUDI KETERSEDIAAN SARANA DAN PRASARANA SEBAGAI DASAR PEMUKIMAN NELAYAN DI KELURAHAN BAGAN DELI KECAMATAN MEDAN BELAWAN

Fadillah Maulana Z, Dessy Eresina Pinem, Rahmad Dian Sembiring — Fri, 26 Jan 2024 00:00:00 +0700

Pemukiman nelayan menjadi salah satu fokus pembangunan di Indonesia, permukiman nelayan merupakan daerah yang banyak di tempati oleh para nelayan dan pemukiman ini juga menjadi salah satu aspek terpenting bagi daerah pesisir yang ada di Indonesia, di Kota Medan terdapat permukima Nelayan salah satunya yaitu di Kecamatan Medan Belawan. Tepatnya di Kelurahan Bagan Deli.Permukiman Nelayan yang terdapat di Kelurahan Bagan Deli menghadap langsung ke Laut dengan mengikuti pola garis pantai atau terdistribusi linear sepanjang garis pantai. Kondisi Sarana Prasarana Pemukiman Nelayan di Kelurahan Bagan Deli ini sudah sesuai dengan standart Permukiman Nelayan pada umumnya hanya saja kondisi dari sarana prasarana tersebut tidak baik bahkan cenderung tidak sesuai dengan standart. Maka dari itu penulis bertujuan untuk mengidientifikasi tingkat ketersediaan sarana dan prasarana dasar di permukiman nelayan di Kelurahan Bagan Deli dan menganalisis kebutuhan sarana dan prasarana dasar permukiman nelayan di Kelurahan Bagan Deli mengacu pada SPM (Standart Pelayanan Minimal). Metode yang digunakan dalam penelitian ini berupa analisis skoring dan analisis deskriptif kuantitatif. Adapun untuk hasil dari penelitian ini berupa tingkat ketersediaan sarana dan prasarana permukiman nelayan dan jumlah kebutuhan sarana dan prasarana permukiman nelayan di Kelurahan Bagan Deli.

PERHITUNGAN BREAK EVEN POINT PADA PERUSAHAAN MANUFAKTUR KAYU

Piala Mutiara — Fri, 26 Jan 2024 00:00:00 +0700

Nowadays, many companies calculate the costs that occur in a production process. But it is very rare for companies to calculate when a company will return on capital and when a company will experience a loss or profit. The purpose of calculating the Break Even Point (BEP) is to find out how many units are needed to return on capital or how much turnover must be achieved so that the company returns on capital. Data processing is carried out using the Break Even Point calculation method by collecting data in the form of fixed cost data and variable cost data for a production process. From the results of data processing, it is obtained that BEP = 994 units with a price of IDR 278,174,937. The company makes a profit if sales are above the BEP and conversely makes a loss if it is below the BEP.

PENANGANAN PERMUKIMAN KUMUH DI KELURAHAN TEGAL SARI III KECAMATAN MEDAN AREA KOTA MEDAN

Atma Maymaran, Rahmad Dian Sembiring, Dessy Eresina Pinem — Fri, 26 Jan 2024 00:00:00 +0700

Slum settlements are a problem faced by almost all cities in Indonesia and other developing countries. This problem is a major obstacle to city development. Rapid population growth, inadequate physical, socio-cultural and economic conditions have resulted in the growth of slum settlements. Slum conditions are known in terms of poor building conditions, roads and drainage as well as poor waste systems. Medan Area District is a district that has been identified as having a slum area. Based on data sources from the Regional Development Planning Agency (BAPPEDA), Tegal Sari III Village in Medan District, the area is included in the slum settlements of Medan City. Then research was carried out on slum settlements with the objectives to be achieved, namely:

Analyze the level of slums in Tegal Sari III Village based on parameters.
Plan a pattern for handling slum settlements in Tegal Sari III Village.

To obtain results for this purpose, the analysis carried out in this research is a weighting analysis, so the results of this research are the level of slums and the results of the handling patterns come out.

SISTEM PENDUKUNG KEPUTUSAN MENENTUKAN MEDIA TANAM TERBAIK PADA TANAMAN CITRUS X SINENSIS DENGAN METODE PSI

Serius Hati Laia, Jeremia Siregar, Rikardo Siahaan — Fri, 26 Jan 2024 00:00:00 +0700

Salah satu bidang dalam sistem informasi yang memberikan kemudahan bagi manajemen dalam memberikan dukungan terhadap keputusan manajemen adalah dengan Sistem Pendukung Keputusan. Aplikasi SPK menggunakan CBIS (Computer Based Information System) yang fleksibel, interaktif dan dapat diadaptasi, yang dikembangkan untuk mendukung solusi atas masalah manajemen spesifik yang tidak terstruktur. Cara kerja sistem ini mencakup seluruh tahap metode pengambilan keputusan dalam menentukan media tanam terbaik pada tanaman Citrus X Sinensis. Dari permasalahan yang terjadi, dengan menggunakan Sistem Pendukung Keputusan akan dapat membantu dalam penyelesaian masalah yang terjadi dengan menggunakan metode Preference Selection Index yang akurat dan tepat sasaran dalam menentukan media tanam terbaik pada tanaman citrus x sinensis.

PERANCANGAN SISTEM DETEKSI TINGGI PERMUKAAN AIR DITANGKI DITAMPILKAN PADA LCD DAN LAMPU INDIKATOR BERBASIS NODEMCU ESP8266

Fri, 26 Jan 2024 00:00:00 +0700

A tool has been designed that can detect low, medium and full water levels. The series of tools designed is based on the NodeMCU ESP8266 microcontroller as the CPU. Because the water level detection tool still uses the Atmel, Atmega, Arduino Uno family microcontrollers as the CPU. The tool is designed to use a magnetic switch water sensor module as a water level detector, a NodeMCU ESP8226 microcontroller as a CPU, an LCD as a low, medium and full information display, a buzzer as an alarm sound signal generator indicating that the water is full, an LED indicator as an indication of the water level level. low, medium, and full. The designed tool can detect the height of the water level in the embankment. The LCD displays low information if buoy water sensor 1 is submerged in water, buoy water sensors 2 and 3 have not been submerged in water. The LCD displays information if the buoy water sensors 1 and 2 are submerged in water, the buoy water sensor 3 has not been submerged in water. The LCD displays full information when the float water sensors 1, 2, and 3 are submerged in water.

APLIKASI PENILAIAN KINERJA KARYAWAN DENGAN METODE GRAPHIC RATING SCALE BERBASIS WEB PADA PT. TRI KARYA CEMERLANG MEDAN

Fangalulu Halawa, Swingly Purba, Ruth Meivera Siburian — Fri, 26 Jan 2024 00:00:00 +0700

Performance appraisal is one way to develop human resources. PT. Tri Karya Cemerlang Medan is a company that always maintains the quality of human resources. One way to do this is to carry out employee performance assessments once a month, but the process is still carried out manually and is only carried out by one person, as is the calculation process. This results in subjective assessment results. Therefore PT. Tri Karya Cemerlang Medan requires a computerized employee performance assessment application and comprehensive assessment accommodation from both employees and management. With the Graphic Rating Scale method, the calculation process is able to accommodate employee performance assessments which consist of several indicators. The application was built on a web basis so that it provides users with the opportunity to access freely and anywhere.

PERANCANGAN SISTEM KEAMANAN KENDARAAN RODA DUA MENGGUNAKAN RFID DIPROGRAM

Sardiman Gulo, Marvin F. S. Hutabarat, Melva Pangaribuan — Fri, 26 Jan 2024 00:00:00 +0700

ABSTRACT

To improve motorcycle security when parked so that it is not easily stolen by thieves, a two-wheeled vehicle security system is designed using RFID and programmed buzzers. The tool is designed to use an Arduino Uno module, an RFID reader module, a relay module, an RFID card and a key chain. The Arduino Uno module functions as a CPU, the RFID reader functions to read RFID contents in the form of a card and in the form of a keychain, the relay module functions as a breaker and connector for electric current. Testing of two-wheeled vehicle security system tools using RFID and programmed buzzers has been carried out. The test results show that the contents of the RFID code can be read, both in the form of cards and key chains. RFID, whose code can be read, is entered into a program that is uploaded to Arduino Uno's flash memory. RFID in the form of a card and key chain which has been entered into the contents of the code into the program which is uploaded to Arduino Uno can turn off the machine and activate the buzzer, turn on and turn off the buzzer.

ESTIMASI SUMBERDAYA PASIR BATU DENGAN METODE CROSS SECTION PADA DESA BIRU-BIRU KABUPATEN DELI SERDANG

Jefri Simanjuntak, Analiser Halawa, Lismawaty — Fri, 26 Jan 2024 00:00:00 +0700

Deli Serdang Regency is a Regency in North Sumatra Province which has natural resource potential in the form of non-metallic minerals and rocks. Stone sand (sirtu) comes from two parts, the large sized volcanic rock material and the fine sized consisting of clay and sand. Based on PP 96 of 2021, stone sand is included in the rock class. This research was conducted to determine resource estimates using the cross section method and the characteristics of rock sand in the research area. Data collection was carried out following the SNI 4726:2011 exploration concept, exploration stages include: review survey, inspection and general exploration of the surface of the mapping area. Based on the mapping results, the distribution of rock sand is not square (random), so using the trapezoidal method to assist in calculating the volume of rock sand in the calculation, we get an estimate of rock sand resources with an indicated resource classification, namely 641,812.5 m³ and the characteristics of rock sand with rock fragments which are thought to come from the mentar unit ( QTvm) and sand originating from the Keutapang (Tuk) formation. The sand-to-stone ratio in the southwestern deposition area is dominated by ±70% sand and ±30% stone, while in the northeastern deposition area it is dominated by ±80% rock and ±20% sand. The suggestion that the author can convey is the need to carry out subsurface mapping to determine the distribution and thickness of rock sand below the surface.