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All Journal Jurnal TIMES InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan Jurnal Teknik Mesin Cakram Jurnal Ilmu Komputer dan Bisnis Almufida: Jurnal Ilmu-Ilmu Keislaman Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Sprocket : Journal of Mechanical Engineering International Journal of Engineering, Science and Information Technology Prima Abdika: Jurnal Pengabdian Masyarakat Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer (JURITEK) IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Satera: Jurnal Sains dan Teknik Terapan JURNAL VOKASI TEKNIK (JUVOTEK)
Kurnia, Dian
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PERANCANGAN SISTEM PERHITUNGAN ANGKA KERAPATAN PANEN BUAH SAWIT BERBASIS WEBSITE Kurnia, Dian; Lumbantoruan, Sorta; Sastrawan Manik, Toba; Br Tarigan, Nurlianna; Darmadi, Herry; Pardede, Erwin
Jurnal TIMES Vol 13 No 2 (2024): Jurnal TIMES
Publisher : STMIK TIME

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51351/jtm.13.2.2024804

Abstract

Perhitungan angka kerapatan panen merupakan cara utnuk melakukan prediksi H-1 untuk menghitung angka prediksi panen. Perhitungan ini biasanya dilakukan oleh mandor / asisten afdeling yang memungkin terjadi kesalahan jika dilakukan perhitungan secara manual. Angka KP tersebut akan menjadi dasar dalam menghitung perkiraan panen (hasil panen buah sawit) / blok perkebunan kelapa sawit. angka perkiraan panen akan menjadi dasar juga dalam menghitung banyaknya pemanen yang ideal untuk bertugas dalam proses panen tersebut. Pada penelitian ini akan dibangun sistem informasi untuk menghitung angka kerapatan panen dan beberapa tugas mandor yang dijelaskan sebelumnya akan didukung dengan sistem informasi ini. Angka kerapatan panen yang dihasilkan oleh sistem informasi nantinya akan dibandingkan dengan perhitungan KP yang dilakukan oleh mandor secara manual. Selisih dari hasil akan dihitung % errornya untuk perbaikan sistem informasi yang dibangun nantinya.
ANALISA LAJU KOROSI KETEBALAN PIPA BAJA KARBON PADA PROSES PEMBAKARAN DI UNIT BOILER Darmadi, Herry; Nelza, Novia; Muhammad Iqbal Harapan Muslim Siregar; Kurnia, Dian; Yudhi Bastanta
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 3 No. 1 (2023): Maret: Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v3i1.920

Abstract

The demand for electrical energy continues to increase along with the increase in economic growth in Indonesia, where currently almost all equipment used by humans depends on electrical energy. The steam power generation system is one of the power generation systems that are commonly used in industries and other power plants. In general, a steam power generation system consists of several main components, namely: pumps, steam turbines, boilers, generators and condensers. Boilers are composed of several components such as pipes, chimneys, superheaters, steam drums, economizers, and other important components. One of the most important components in the boiler system is the boiler pipe which plays a role in helping the combustion process to be used in the boiler. Loss of boiler pipe thickness due to corrosion is one of the important factors that really need to be considered in the boiler combustion process at PLTU. Loss of thickness of the boiler pipe in the combustion process that is too large can cause pipe leakage which results in the interruption of the combustion process in the boiler pipe. So to overcome this problem, checks are carried out to carry out maintenance on the boiler pipe to avoid leaks in the boiler pipe. After the calculation, the average reduction in pipe thickness due to corrosion is 0.1465 mm/yr
STRATEGI PEMBELAJARAN DIRECT INTRODUCTION PADA ANAK BERKEBUTUHAN KHUSUS TUNA GRAHITA DI SLB-E NEGERI PEMBINA TINGKAT PROVINSI SUMATERA UTARA Mukti, Muhammad Akbar; Kurnia, Dian; Muaya, Citra Dewi; Ramadhan, M. Rizky; Sundari, Sundari; Sovia, Sovia; Pharama, Tiara Eka
Almufida : Jurnal Ilmu-Ilmu Keislaman Vol 9, No 2 (2024): Almufida: Jurnal Ilmu-Ilmu Keislaman
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/almufida.v9i2.4989

Abstract

Children with intellectual disabilities who have limitations and deficiencies in terms of intelligence also have the right to receive education. One of the education provided to children with intellectual disabilities is in the form of a special self-development program with the aim of fostering children's independence. Moderate intellectual disabilities have limitations in the ability to care for themselves, take care of themselves, help themselves, life skills, etc. The research method in this study uses a descriptive qualitative approach research method, while the data collection process in this study uses observation, interview, and documentation techniques. This research was conducted on Monday, December 4, 2023 at 08.00 to 12.00 WIB. The location of the research was carried out at the SLB-E Negeri Pembina, North Sumatra Province, precisely in class XI-1C. The learning strategy for ABK with intellectual disabilities is of course we choose a learning strategy that suits them, because ABK with intellectual disabilities must carry out learning with an individual approach if now using the independent curriculum, actually ABK with intellectual disabilities have been independent learning for a long time. The direct introduction learning strategy for children with special needs and mental retardation is quite effective and can be used as an alternative for children with special needs and mental retardation in carrying out their learning activities.
Hybrid Deep Fixed K-Means (HDF-KMeans) Zuhanda, Muhammad Khahfi; Kohsasih, Kelvin Leonardi; Octaviandy, Pieter; Hartono, Hartono; Kurnia, Dian; Tarigan, Nurliana; Ginting, Manan; Hutagalung, Manahan
International Journal of Engineering, Science and Information Technology Vol 5, No 3 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i3.913

Abstract

K-Means is one of the most widely used clustering algorithms due to its simplicity, scalability, and computational efficiency. However, its practical application is often hindered by several well-known limitations, such as high sensitivity to initial centroid selection, inconsistency across different runs, and suboptimal performance when dealing with high-dimensional or non-linearly separable data. This study introduces a hybrid clustering algorithm named Hybrid Deep Fixed K-Means (HDF-KMeans) to address these issues. This approach combines the advantages of two state-of-the-art techniques: Deep K-Means++ and Fixed Centered K-Means. Deep K-Means++ leverages deep learning-based feature extraction to transform raw data into more meaningful representations while employing advanced centroid initialization to enhance clustering accuracy and adaptability to complex data structures. Complementarily, Centered K-Means improve the stability of clustering results by locking certain centroids based on domain knowledge or adaptive strategies, effectively reducing variability and convergence inconsistency. Integrating these two methods results in a robust hybrid model that delivers improved accuracy and consistency in clustering performance. The proposed HDF-KMeans algorithm is evaluated using five benchmark medical datasets: Breast Cancer, COVID-19, Diabetes, Heart Disease, and Thyroid. Performance is assessed using standard classification metrics: Accuracy, Precision, Recall, and F1-Score. The results show that HDF-KMeans outperforms traditional K-Means, K-Means++, and K-Means-SMOTE algorithms across all datasets, excelling in overall accuracy and F1 Score. While some trade-offs are observed in specific precision or recall metrics, the model maintains a solid balance, demonstrating reliability. This study highlights HDF-KMeans as a promising and effective solution for complex clustering tasks, particularly in high-stakes domains like healthcare and biomedical analysis.
ANALISA PENGUJIAN MEKANIK TERHADAP VARIASI PENGGUNAAN BENTONITE DALAM PENGECORAN PINTU RUANG BAKAR: STUDI EKSPERIMEN DI PT. XYZ Darmadi, Herry; Fatih Abdillah, Muhammad; Nurya Savitri, Agustin; Karti, Karti; Kurnia, Dian; Murhaban, Murhaban
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.13836

Abstract

The Combustion chamber door is a component of the boiler that functions to open and close the combustion chamber. At PT. XYZ, the combustion chamber door is made through the melting and metal casting method. In the metal casting method using a sand mold, an auxiliary substance in the form of bentonite is needed which functions to glue the sand mold and strengthen the mold so that it is not easily destroyed when receiving heat from the molten metal lava. The bentonite variations used in this study are 8%, 10%, and 12%. Mechanical testing (impact and hardness) is the most effective test to determine the description of the mechanical properties of a material. The purpose of this study is to determine the magnitude of the impact strength of the metal casting results in the manufacture of combustion chamber doors with different bentonite variations impact testing with the Charpy Impact Test method and the hardness value of the metal casting results in the manufacture of combustion chamber doors with different bentonite variations through hardness testing with the Rockwell Hardness Test method. In the impact test, the results of the impact strength analysis of the 8% bentonite variation were 0.1655 Kg.m/mm2, the 10% bentonite variation was 0.2119 Kg.m/mm2, and the 12% bentonite variation was 0.2555 Kg.m/mm2. In the hardness test, the results of the hardness analysis on the 8% bentonite variation were 104,7 HRC, the 10% bentonite variation was 92,1 HRC, and the 12% bentonite variation was 81,8 HRC.
Besarnya Penyusutan Yang Terjadi Pada Peleburan Logam Non-Fero Dengan Menggunakan Bahan Baku 2.5 Ton Logam Untuk Pembuatan Komponen Boiler Pada Tanur Kupola Di PT. X Darmadi, Herry; Dewatmoko, Muhammad Andika; Kurnia, Dian; Bintang, Nurul Shadrina
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 7 No 1 (2025): Edisi Agustus 2025
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v7i1.1932

Abstract

The casting industry is a kind of mining industry, where all industry manufacturing would never exist without the casting of the casting industry, much more difficult for the economy of a country without its own industrial role. A brushwork furnace that is one of the most popular types of metal smelting kitchens. The large shrink that occurs at smelting metals for making boiler components using 2.5 tons of raw materials is 15.08 percent or weighing 2,123 kg. the foundry in PT X using cocash-fuel (coal with high carbon levels). The process of smelting metals included sand prints that served the desired components, supplying raw materials and fuel to suit needs, smelting the kiln in my furnace with the help of blowers, pouring the molten metal into the ground, and cooling the molten metal.
Sosialisasi Dasar Keselamatan dan Kesehatan Kerja Pengelasan untuk Pegawai PMT PTPN IV Dolok Ilir Sitepu, Evi Christiani; Purba, Switamy Angnitha; Sitinjak, Anna Angela; Lumbantoruan, Sorta; Kurnia, Dian; Saragih, Koko Pratama; Tarigan, Nurlianna; Manik, Toba Sastrawan; Maulidna, Maulidna; Nelza, Novia; Samiriadi, Samiriadi; Tambunan, Diman Raymond S
Prima Abdika: Jurnal Pengabdian Masyarakat Vol. 3 No. 3 (2023): Volume 3 Nomor 3 Tahun 2023
Publisher : Program Studi Pendidikan Guru Sekolah Dasar Universitas Flores Ende

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/abdika.v3i3.3052

Abstract

The application of Occupational Safety and health (K3) is very important in the work environment because it is closely related to the risk of accidents, safety and health when carrying out work. Various efforts have been made by the Tenera machinery factory (PMT) PTPN IV to minimize work accidents and diseases caused by work by installing warning signs, the use of complete personal protective equipment (PPE), providing good nutrition and regular health checks. However, the lack of awareness of K3 is still found in PMT PTPN IV Dolok Ilir workers. This can be seen from the still finding of minor work accidents and occupational health effects shown from the results of employee health reports. The methods used in this service activity are socialization, training, discussion on the basics of K3 welding for employees of PMT PTPN IV, so that factory employees are able to identify potential hazards that can occur in the workplace and accident prevention measures. The results of the socialization and training of welding K3 activities that have been carried out are expected to increase employee awareness of the importance of K3. So that the company is able to maintain the zero accident predicate.
Amount of Frictional Force of Steel Rope Against The Bollard Due To The Loading In The Process of Towing Lorry at PT. XYZ Darmadi, Herry; Irwansyah, Irwansyah; Kurnia, Dian; Hidayat, Rendy Ardian
Jurnal Sains dan Teknik Terapan Vol. 2 No. 1 (2024): Jurnal Sains dan Teknik Terapan
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat, AK-Manufaktur Bantaeng

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bollard is a piece of equipment found at the fruit receiving station which has the working principle of turning the steel wire rope and holding it in the process of pulling the lorry to be put into the sterilizer, to move the lorry to each door, the loading ramp is pulled by a capstand using a steel wire rope attached to it. to the bollard as a support and deflector so that the lorry can move forward and backward. The event that occurs as a result of pulling a lorry using a sling is an event where friction forces occur, and the friction that occurs on the bollard is caused by the presence of two objects in contact with a normal load. In this study, the value of the friction force that occurs on the steel wire rope against the bollard is calculated. From the research results, it was concluded that the amount of frictional force that occurs on the steel wire rope against the bollard when under load is influenced by the capstand speed which is quite low due to the load condition of 173,850 kg m/s². Meanwhile, the magnitude of the frictional force that occurs in the steel wire rope against the bollard under no-load conditions is influenced by the faster pulling speed, so the friction force value is 116,850 kg m/s²
Analisa Ketebalan Dinding Shell (Splitting) Dengan Metode Pengukuran Temperatur Tinggi Menggunakan Alat Ultrasonic Thickness Pada Fatty Acid Plant Di PT XYZ Darmadi, Herry; Tarigan, Agrifa Bremanata; Purba, Ulfani Ikhwana; Lumbantoruan, Sorta; Bintang, Nurul Shadrina; Faulianur, Rizki; Kurnia, Dian
Jurnal Teknik Mesin Cakram Vol. 8 No. 2 (2025): Jurnal Teknik Mesin Cakram
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fat splitting atau hidrolisis adalah istilah di mana lemak atau minyak direaksikan dengan air untuk membentuk gliserol dan asam lemak. Tujuan proses di section Splitting Column bertujuan untuk memisahkan asam lemak dan gliserin. Senyawa trigliserida yang terdapat dalam minyak atau lemak dihidrolisis dengan air menghasilkan asam lemak dan gliserin. Tujuan penelitian ini adalah untuk menghitung nilai tebal dinding shell splitting dari hasil pengukuran ultrasonik akibat adanya perbedaan temperatur antara blok kalibrasi dengan temperatur dinding shell. Pengukuran dilakukan dengan metode NDT (Non-Destructive Test), salah satu pengujian yang dapat dilakukan pada suatu material, komponen, atau struktur untuk mengukur beberapa karakteristik tanpa merusak komponen atau material benda uji tersebut. Salah satu jenis NDT yang digunakan adalah ultrasonic thickness test. Uji ultrasonik termasuk salah satu uji tanpa rusak, terutama untuk mendeteksi cacat internal dan ketebalan dinding. Dari data hasil pengukuran didapat kesimpulan bahwa setelah dilakukan perhitungan, nilai tebal tertinggi adalah 61,89 mm pada shell 18000 di titik 270°, dan nilai tebal terendah yaitu 60,05 mm pada shell 24000 di titik 180° pada unit splitting. Abstract: Fat splitting or hydrolysis is a term where fat or oil is reacted with water to form glycerol and fatty acids. The purpose of the process in the Splitting Column section is to separate fatty acids and glycerin. Triglyceride compounds contained in oil or fat are hydrolyzed with water to produce fatty acids and glycerin. The purpose of this study is to calculate the shell splitting wall thickness value from the results of ultrasonic measurements due to the temperature difference between the calibration block and the shell wall temperature. Measurements are carried out using the NDT method. Non-Destructive Test is one of the tests that can be carried out on a material, component, or structure to measure several characteristics without damaging the component or material of the test object. One type of NDT used is the ultrasonic thickness test. Ultrasonic testing is one of the non-destructive tests, especially for detecting internal defects and wall thickness. From the measurement data, it can be concluded that after calculating the thickness value, the highest thickness value was 61.89 mm on the 18000 shell at the 270° point, and the lowest thickness value was 60.05 mm on the 24000 shell at the 180° point on the splitting unit.
Co-Authors Asyrori Sidabutar, Naqasya Bintang, Nurul Shadrina Br Tarigan, Nurlianna Darmadi, Herry Dewatmoko, Muhammad Andika Fatih Abdillah, Muhammad Faulianur, Rizki Ginting, Manan Gultom, Golfrid Hartono Hartono Herry Darmadi Hidayat, Rendy Ardian Husainy, Husainy Hutagalung, Manahan Irwansyah Irwansyah K S Harefa, Paul Karti, Karti Kelvin Leonardi Kohsasih Lumbantoruan, Sorta M. RIZKY RAMADHAN Malau, Frans Aditiya Malik, Yulianti Manik, Toba Sastrawan Maulidna, Maulidna Muaya, Citra Dewi Muhammad Iqbal Harapan Muslim Siregar Muhammad Khahfi Zuhanda Mukti, Muhammad Akbar Murhaban Murhaban Mustakim Mustakim Nelza, Novia Nurya Savitri, Agustin Oktavian, Halvian Pardede, Erwin Pharama, Tiara Eka Pieter Octaviandy, Pieter Purba, Switamy Angnitha Purba, Ulfani Ikhwana Rosmiati Rosmiati Samiriadi, Samiriadi Saputra Tarigan, Juliastio Saragih, Koko Pratama Sastrawan Manik, Toba Sitepu, Evi Christiani Sitompul, Roganda Sovia, Sovia Suci Ramadhani, Suci Sundari Sundari Syabil, Irfan Tambunan, Diman Raymond S Tarigan, Agrifa Bremanata Tarigan, Nurliana Tarigan, Nurlianna Yudhi Bastanta