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Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
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Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 905 Documents
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Identifikasi Sebaran Endapan Rawa dengan menggunakan Geofisika Logging sebagai data pendukung Pemodelan Geologi di PT Berau Coal Blok Sambarata: INDONESIA martadi; Andy Erwin Wijaya
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Aplikasi metode well logging pada 14 titik pengeboran eksplorasi dan interpretasi data density log dilakukan untuk mengetahui lithologi bawah permukaan dan arah penyebaran endapan rawa di Blok Sambarata, area penambangan PT Berau Coal, Kabuptaen Berau, Kalimantan Timur. Tujuan dari penelitian ini adalah untuk mengaplikasikan pendekatan geofisika logging dengan fokus pada parameter densitas. Hasil interpretasi data geophysical well logging menunjukkan bahwa lithologi penyusun yang dominan pada daerah penelitian adalah batu pasir, batu lempung, batubara, dan Endapan alluvium (endapan material berupa rawa). Selain itu di peroleh range nilai densitas pada endapan rawa antara ± 1231.16 sampai ± 2048.81 CPS, Range nilai densitas pada batulempung antara ± 756.20 sampai ± 1541.25 CPS, Range nilai densitas pada batupasir antara ± 819.53 sampai ± 1333.31 CPS, Range nilai densitas pada batubara antara ± 822.76 sampai ± 2194.64 CPS. Pola sebaran rawa di modelakan berdasarkan korelasi antar kontur kedalaman yang menunjukkan pola aliran sungai. Secara keseluruhan pola aliran tersebut berasal dari daerah tinggian mengikuti bidang lereng menuju daerah terendah dengan membuat pola aliran sungai purba (paleocurrent). Secara umum daerah terdalam dapat di tentukan pada bagian tengah mengikuti aliran sungai purba. Kata kunci: Density log, Well logging, Endapan rawa.
Pengaruh variasi milling terhadap strukturmikro dan kekerasan paduan serbuk Fe-C dengan metode mechanical alloying Aleksander Jehatu; Sutrisna; Mustakim; Dandung Rudy Hartana
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

This study aims to investigate the effect of varying milling durations (4 hours, 8 hours, and 12 hours) on the microstructure and hardness of Fe-C alloy powders processed using the mechanical alloying method. The mechanical alloying process involves high-energy milling to produce a homogeneous mixture with fine grain size. The variation in milling duration is expected to influence microstructural changes, such as grain size, phase distribution, and the formation of metastable phases. Microstructural analysis was conducted using electron microscopy. The results show that longer milling durations lead to finer grain sizes and an increase in martensitic phase formation. At 12 hours of milling, the grain size reached the nanometer scale, contributing to increased hardness (425 HVN) and microstructural homogeneity. Thus, the variation in milling duration significantly impacts the microstructural evolution of Fe-C alloy, with longer milling durations producing finer and more uniform microstructures. This research provides deeper insights into the relationship between milling parameters and the microstructural properties of Fe-C alloy for more optimal applications in engineering materials. .
Penerapan Internet of Things (IoT) pada sistem pemanggil perawat di rumah sakit (Nurse Call) Erranaomi, Muhammad Brilian; Astuti, Femi Dwi
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Hospitals are public facilities that are very much needed by the community. As technology advances, hospital facilities also develop with the presence of increasingly advanced technology. This study aims to develop and implement an Internet of Things (IoT)-based nurse calling system in hospitals using Message Queuing Telemetry Transport (MQTT) technology and the ESP8266 microcontroller. IoT is a concept that allows various devices to connect and communicate with each other via the internet, thus facilitating real-time data exchange without human interaction. This system allows patients to call nurses in real-time through devices connected to a Wi-Fi network. Messages sent from devices in each patient's room are forwarded to the MQTT server, which then sends notifications to the nurse application. Testing was carried out to measure the latency, reliability, and power consumption of the system. From the results of 100 experiments, the average latency obtained varied depending on the distance between the ESP8266 device and the Access Point, with the lowest average latency of 26.72 ms at a distance of 15 meters, and the maximum latency reaching 2897 ms at a distance of 20 meters. The system demonstrated 100% reliability, with no packet loss during testing. In terms of power efficiency, the device consumes only 0.35 watts, making it energy efficient and suitable for long-term implementation in hospital environments. With acceptable latency and high reliability, the system is expected to improve nurses’ response time to patients, as well as provide an efficient and reliable communication solution in hospitals.
Rekayasa Geometri Peledakan Terhadap Penggunaan Bahan Peledak Berdasarkan Fungsi Linier Pada Penambangan Batu Andesit Sartika
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Mining of andesite at PT. Pro Intertech Indonesia is carried out through drilling and blasting activities using explosives in the form of Ammonium Nitrate and Fuel Oil (ANFO). In calculating the use of explosives based on blast geometry, several methods are used, including the theory of The Modern Technique of Rock Blasting, the ICI-Explosive theory, and linear functions based on correlation graphs. The actual blast geometry in the field has short burden, spacing, and stemming, as well as a high bench height and long charge column length, resulting in the use of 46.98 kg of explosives with fragmentation results of approximately 16 cm. Based on the designed geometry, the use of explosives would be reduced by using the ICI-Explosive theory. However, the geometry design recommended by the author is to use The Modern Technique of Rock Blasting theory, as a smaller powder factor can minimize blasting effects such as fly rock and vibration, which impact the environment. The resulting geometry design includes a burden and stemming of 2.68 m, spacing of 3.34 m, subdrilling of 0.91 m, bench height of 10.66 m, and charge column length of 9.28 m. This geometry design uses 46.19 kg of explosives per blast hole and produces a blast production volume of 243.34 tons, with fragmentation results of 20.17 cm.
An Upaya Peningkatan Kesadaran Masyarakat terhadap Risiko Tanahlongsor melalui Pengenalan Gejala dan Langkah Pencegahan di Kalurahan Sidoharjo, Samigaluh Tedja Trisnaning, Paramitha; Ani Apriani
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Pengabdian Kepada Masyarakat)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The landslide hazard in Sidoharjo Village is included in the high class with a moderate to high level of vulnerability. This is due to the low capacity of the community in dealing with landslide disasters. A number of local communities lack of understanding of their homes located in landslide-prone areas. In order to minimize the potential risk, landslide early warning system have been installed in a number of places However, it does not cover all landslide-prone areas in Sidoharjo Village. Therefore, this community service aims to increase the effectiveness of mitigation in Sidoharjo Village. Community service is carried out through presentation of material that includes a general explanation of the landlslide symptoms by providing examples and pictures related to symptoms of landslides and landslides prevention activities. Community service were carried out quite effectively, as shown by the enthusiasm of the participants during the delivery of the material which was followed by a discussion. There was an increase in understanding of landslide symptoms and landslide prevention efforts among the Sidoharjo Village government apparatus, as indicated by a sig value <0.05 at a 95% confidence level.
Efektifitas Strategi Pengendalian Wake-effect dalam Memaksimalkan Produksi Daya Ladang Turbin Angin Kurniawan; Hasanudin; Dwiyanto, Agus; Tyaksa Putra, Rivanda
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The wake effect is an aerodynamic interaction between turbines in a wind farm, where wind flow is blocked by turbines ahead, leading to a total power loss of 10-25%. The wake effect can be controlled by adjusting the yaw-offset angle, pitch angle, tip-speed ratio, or a combination of these strategies. This research aims to compare and determine the most effective control strategy to maximize total wind farm power production. The method involves analyzing and simulating various control strategies to reduce the wake effect. A Gaussian wake-effect model is used to simulate wind flow patterns, turbine interactions, and total wind farm power. Data is generated from simulations under wind speeds of 3 m/s and 10 m/s, and turbine spacing of 7D and 12D. Results show that total wind farm power production increased by 11.41%, 2.21%, 0.00%, and 12.70% for yaw-offset angle, pitch angle, tip-speed ratio, and a combination of the three, respectively. The study identifies the combination of these parameters as the most effective strategy for reducing the wake effect. Proper wake-effect control can significantly boost total wind farm power production, with broader potential applications for commercial wind farms in the future.
Estimasi Sumberdaya Pit 1 Blok Selatan dengan Metoda Silcular 5015-2019 Daerah Puruk Cahu Kalimantan Tengah Asep Tri Herdianto; Erwin Wijaya, Andy
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Coal is one of the energy minerals found in Indonesia with significant potential, particularly in Kalimantan. The objective of this research is to calculate a more accurate estimate of reserves in the study area with a thickness range of 1-1.2 meters. The distribution of the seam generally follows a pattern from Northeast to Southwest with a moderate dip angle of 70-80 degrees. Based on SNI 5015-2011, the geological complexity of the study area falls into the “Complex” category according to SNI 5015-2019 due to the steep inclination of the rock layers. The estimation of coal resources using the Circular Method, aided by software, yielded the following results: measured coal resources of 1,127,778.23 tons, indicated resources of 2,024,364.08 tons, and inferred resources of 2,948,000.06 tons.
Kualitas Air Tanah Sumur Gali Dangkal pada Batugamping Sentolo Daerah Balecatur Bagian Selatan, Kapanewon Gamping Widiyaningsih, Harti; Erwin Wijaya, Andy
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The research location is in the southern part of Balecatur Village, Kapanewon Gamping. This research aims to determine the quality of groundwater in shallow dug wells located in limestone lithology. The research method used is to use primary data through direct measurement observations in the field and sample testing in the laboratory as well as secondary data to see the quality of ground water in the research area. Based on the results of observations of visual physical descriptions and measurements in the field of color, taste, smell, temperature, pH, TDS at 6 well observation locations, the water generally shows that it is suitable, while based on the analysis of physical and chemical parameters in 2 samples with water quality standards for hygiene purposes and sanitation RI Minister of Health Regulation no. 2 of 2023, samples showed that dug well water had values ​​that exceeded the TDS standard (<300 mg/l) in all observed wells with values ​​between 408 – 601mg/l and color in the Sum-1 well. This TDS value exceeds the quality standard, it is possible for water to be in a well with limestone lithology, because the nature of limestone is easily soluble so that some minerals dissolve in water such as lime (calcium carbonate) and the condition of well water stored in the well for a long time is affected by rock weathering.
Formasi Semilir Fasies Formasi Semilir di Daerah Prambanan dan Sekitarnya: fasies formasi semilir Astuti, Bernadeta Subandini; Isnawan, Dianto
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Regionally, the Semilir Formation is composed of volcanic products. That are dominated by tuff and lapilli, deposited in shallow marine to non-marine environments in the early Miocene to Middle Miocene, the deposition continued until the end of the Miocene. Based on outcrops in the Wukirharjo area, Prambanan, the Semilir Formation, is found to have debris flows and slumps, there is no information about these outcrops regionally, and this is the background to the research. The purpose of the study was to describe the character and facies of the Semilir Formation. The method used was stratigraphic measurement accompanied by paleontological analysis. The results of the study, the Semilir Formation can be divided into 2 facies classes, namely facies F (debris flow) and facies C (turbidity current). The lower facies of the debris flow product is 95 meters thick, composed of dominant lapilli-andesite breccia with a sandstone base mass, with a northwest-southeast paleocurrent direction; facies C is a product of current turbidity in the upper part composed of dominant tuff and sandstone-mudstone repetitions, with a west-east paleocurrent direction. The presence of debris flows and slump as the boundary between the two facies, or the beginning of the deposition of turbidity lithology products at this time.The age of the Semilir Formation in the research area using primary data is N6-N9, with a time gap of N7-N8. The overall age from both primary and secondary data, the Semilir Formation is N4-N16, with a time gap of N7-N8.
Analisis Respon Hidrogeologi terhadap Stress Saat Terjadi Gempabumi (Studi Kasus Semburan Lumpur Setelah Gempa Tasikmalaya 2009 dan Pidie Jaya 2016) J. Sinipar, Dimas Salomo; Erwin Wijaya, Andy; T. Listyani R.A.
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Tectonic earthquakes often cause hydrogeological responses such as mudflows, but the mechanism by which stress during an earthquake triggers such responses is still unclear. The 2009 Tasikmalaya earthquake (M7.0), for example, triggered a mudflow in Pasirgede Village, Sukahening District, Tasikmalaya Regency, West Java. Another example is the 2016 Pidie Jaya, Aceh earthquake (M 6.5), which also triggered a mudflow in Meunasah Balek Village, Meureudu District, Pidie Jaya Regency, and in Benih Tamiang Village, Rantau District, Aceh Tamiang Regency. In this study, an investigation was conducted on volumetric strain, normal stress, and dynamic stress changes from tectonic earthquakes at the site location experiencing hydrogeological responses. The results show that the hydrogeological response is more caused by dynamic stress changes by seismic waves generated by the tectonic earthquake. This study is useful for understanding the hydrogeological response to stress that occurs during earthquakes, especially in relation to mitigating disaster events..

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