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INDONESIA
TEKNIK
Published by Universitas Diponegoro
ISSN : 08521697     EISSN : 24609919     DOI : -
Core Subject : Engineering,
Engineering
Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol. 44, No. 3 (2023): December 2023" : 7 Documents clear
Implementasi Multi-Method Modeling untuk Mendukung Keterpaduan Perencanaan Pembangunan di Sub DAS Srep, Kabupaten Kudu Sriyana, Sriyana; Winaktoe, Wied Wiwoho
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.56875

Abstract

Tata kelola pembangunan yang lemah terindikasi menjadi penyebab ancaman bencana kelangkaan air di Indonesia pada tahun 2045. Tata kelola tersebut khususnya terkait keterpaduan pengelolaan Daerah Aliran Sungai (DAS).  Penelusuran terhadap praktik mutakhir komunitas Internasional menunjukkan bahwa multi-method modeling menjadi rekomendasi untuk diaplikasikan. Tujuan riset ini adalah menerapkan multi-method modeling yang didukung oleh eksaminasi hubungan kausal terhadap parameter pembentuk sub kriteria klasifikasi DAS dan merestrukturisasi hasil-hasil tersebut melalui DPSIR. Adapun lokasi kajian berada di Sub DAS Srep, Jawa Tengah dan dataset merupakan data-data yang diperoleh melalui dokumen kajian sub DAS Srep, Indeks Desa Membangun, dan survey pada periode 2015-2020.  Hasil riset menunjukkan bahwa (1) sub terdapat sub kriteria yang menjadi prasyarat atau penentu keberhasilan sub kriteria klasifikasi DAS lainnya; (2) informasi hubungan eksogenik yang diformulasi secara saintifik dapat membantu sektor-sektor mengetahui posisinya dan hubungannya terhadap sektor lainnya agar dapat bersinergi secara subtantif maupun ketepatan dalam jadwal pelaksanaan. Hal ini dapat memperjelas akar masalah, meningkatkan keterpaduan perencanaan dan mereduksi kelemahan kordinasi dan tumpang-tindih kegiatan; (3) analisis secara isolatif tidak sensitif terhadap dampak yang ditimbulkan pada parameter atau sub kriteria lain dalam DAS.  
A Review on Digital Microscopic Images for Plasmodium Parasite Detection Nisworo, Sapto; Prananda, Alifia Revan
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.53990

Abstract

Indonesia is one of the regions that contribute to the increasing number of malaria cases. In 2019, more than 250 million malaria cases were found in Indonesia. This phenomenon is caused by several factors, including the examination procedure. In Indonesia, the digital microscopic examination has become the gold standard procedure in detecting and diagnosing malaria, whereas this procedure requires considerable expertise. Hence, the rapid examination is difficult to ensure. In order to overcome this problem, several methods of malaria detection have been proposed with a different approach. Image processing and computer vision techniques have become a powerful approach in the development of early detection systems called computer-aided detection (CADe) and computer-aided diagnosis (CADx). Several previous findings reported their contributions in detecting Plasmodium parasites using image processing and computer vision. Recently, artificial intelligence, including machine learning and deep learning, also offered outstanding results in detecting the Plasmodium parasite. This paper aims to present a scientific review of recent image processing and computer vision applications for the development of CADe or CADx in order to assist the doctor in doing rapid detection and diagnosis.
Analisis Jenis Dan Dimensi Pasir Pembentuk Material Mortar Terhadap Konduktivitas Panas Efektif Ismail, Nova Risdiyanto; Suwandono, Purbo; Hermawan, Dadang; Wicaksono, Hangga
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.43966

Abstract

The solar radiation heat absorbing plate is a major component in solar still applications. The fin absorber plate with mortar material as a heat absorber, heat transfer, and evaporation medium. In the fin absorber plate with mortar material, seawater flows inside the fin body capillarity and undergoes an evaporation process, leaving salt in the pores. Salt in the pores, type, and dimension of sand as the main forming material of mortar will also affect the effective heat conductivity value. This study evaluates salt formation in the pores with various types and dimensions of sand-forming mortar material on effective heat conductivity. The research was conducted experimentally by comparing the types and dimensions of sand-forming mortar. The types of sand used were iron sand (PB) and lichen sand (PL), with sand dimensions of 0.125 and 0.250, respectively. The types and dimensions of sand were formed into mortar with a mixture of 2 sand and one cement. The mortar test was compared with stone material. In the test, heating was applied to the top surface of the mortar and stone using a heating element (heater) with 46.4 W power for 120 minutes. The research resulted in the effective heat conductivity of all mortar materials increasing with increasing heating time and salt in the pores. The mortar material using iron sand with a dimension of 0.125 mm (PB.0.125) has a higher total effective heat conductivity of 0.712 (W/m0C) than PB.0.250, PL.0.125, PL.0.250 and stone.
Optimasi Multi Faktor pada Formula Karet Alam terhadap Gesekan Material Elastomer Karet Alam untuk Aplikasi Telapak Kaki Prostesis Khafidh, Muhammad; Irfan, Afi Muhammad; Suryawan, Donny; Kistriyani, Lilis; Ismail, Rifky
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.58024

Abstract

Indonesia is the world's second-largest producer of natural rubber. Various products can be made of natural rubber. One of them is a foot prosthesis. An essential criterion for foot prosthesis is a significant value of friction force to prevent slip during usage. The present study optimizes natural rubber formulation to obtain the largest friction force value. A pin-on-disk tribometer is used to obtain friction force values. The optimization method used in the present study is Taguchi Method Orthogonal Array L9, while the contribution of each control factor to increase friction is carried out using ANOVA analysis. Four control factors are used in this study: the type of natural rubber, the percentage of silica powder, the percentage of sulfur, and the vulcanization temperature. Each control factor has three different levels. The test results showed that the optimum formulation to obtain the highest friction value is a mixture of concentrated natural rubber and instant natural rubber, 30 phr of silica powder, 5 phr of sulfur, and 150°C of vulcanization temperature. The friction force of the optimum formulation increases by 33% compared to the baseline formulation. ANOVA analysis shows that the vulcanization temperature is the most crucial factor in increasing the friction force, contributing 62.58%.
Analisis Kebijakan Land Value Capture dan Metode Zona Nilai Tanah dalam Perbedaan antara Kebijakan dan Pengukuran (Studi Kasus: Koridor Jalan Durian Raya, Banyumanik) Putri, Zulfara Disnatya Anggita; Wahyuddin, Yasser; Amarrohman, Fauzi Janu
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.57930

Abstract

Nilai lahan memiliki perubahan dinamis. Peningkatan nilai lahan menjadi salah satu sumber pendapatan asli daerah melalui penyesuaian Nilai Jual Objek Pajak (NJOP). Penyesuaian NJOP menggunakan pendekatan harga pasar dan potensial untuk implementasi kebijakan Land Value Capture. Penelitian ini bertujuan untuk mengetahui zona nilai tanah tahun 2023, pengaruh faktor aksesibilitas, pusat perdagangan, fasilitas kesehatan, fasilitas pendidikan dan sarana umum terhadap nilai tanah serta potensi implementasi kebijakan Land Value Capture. Studi kasus dilakukan untuk tanah di sekitar koridor Jalan Durian Raya, Banyumanik, Semarang. Metode yang digunakan yaitu Spatial Autoregressive Model (SAR) dan Assessment Sales Ratio (ASR). Hasil penelitian menunjukan bahwa zona dengan Nilai Indeks Rata-Rata (NIR) tertinggi yaitu zona 2409, dengan nilai sebesar Rp. 23.364.000,- untuk harga pasar dan zona 181 sebesar Rp. 15.105.000,- untuk NJOP. NIR terendah yaitu zona 860 sebesar Rp. 2.448.000,-  untuk harga pasar dan Rp. 792.000,- untuk NJOP. Hasil penghitungan SAR menunjukan pengaruh faktor aksesibilitas merupakan faktor paling signifikan, dengan nilai sebesar 0,0007 pada harga pasar dan 0,00188 pada NJOP. Dari penghitungan ASR di Jalan Durian Raya didapatkan hasil sebesar 35% pada zona 28 dan 73% pada zona 323. Nilai ini menunjukkan bahwa pada kedua zona tersebut masih perlu dilakukan penyesuaian NJOP.
Study of Machining Strategies for CNC Milling of Foot Prosthetic Using Taguchi Methodology Lestari, Wahyu Dwi; Adyono, Ndaru; Faizin, Ahmad Khairul; Sanjaya, Kadek Heri
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.57885

Abstract

The use of CNC milling machines in the industrial sector greatly contributes to the production of high-quality products that align with consumers' desired shapes. Currently, the precise machining parameters for manufacturing a product are determined through a time-consuming and costly process of trial and error. Most prior significant studies have examined the variables that can impact the duration of machining time. However, different machining conditions require different control factors. The key objective of this study is to enhance the machining parameters and identify the crucial factors that influence the duration of machining in the production of foot prostheses. The experiment was conducted using a 3-axis CNC milling machine with five machine parameters: spindle speed, feed rate, step over, depth of cut, and toolpath strategy. The Taguchi method with orthogonal array L2735 was chosen as an optimization method. The optimum machine parameters are analyzed using signal-to-noise (S/N) ratio and ANOVA. The analysis shows that spindle speed is the most influential variable on machine time. The next factor is the depth of cut, feed rate, and toolpath strategy, and the last is step over.
Analisis Hidrogeokimia Dan Logam Berat Pada Air Tanah Menggunakan Metode WQI dan HPI Untuk Keperluan Higiene Sanitasi Kabupaten Belitung Timur Putri, Maya Aiko Salsabila; Putranto, Thomas Triadi; Santi, Narulita
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.56996

Abstract

Kelapa Kampit is one of the tin-producing districts in East Belitung, which is composed of the Kelapa Kampit Formation. This mining activity affects water quality, which, of course, is also influenced by geological formations. This study aims to analyze the hydrogeochemistry and heavy metals in shallow groundwater in Kelapa Kampit District using water quality indexes in the form of water quality index and heavy metal pollution index methods. Hydrogeochemical test results showed a pH value of water 4 – 6.77 in the acidic category, a DHL value of 20 – 145 μS/cm, and a TDS value of 14 – 111 mg/L. From the visualization of chemical data, groundwater has various facies. The results of the Stiff Diagram show that water contains predominant calcium, magnesium, sulfate, and bicarbonate ions. The Gibbs diagram results show that the water has not been contaminated. The results of heavy metal testing also showed that the values of Fe2+, Mn2+, Pb2+, Zn2+, and Cu2+ were classified as low, and Al3+ was quite high. The results of water quality testing using the water quality index showed that the research area had excellent water quality, and the results of the heavy metal testing using the HPI method showed a low heavy metal contamination value. Based on hydrogeochemical and heavy metal analysis of shallow groundwater, Kelapa Kampit District has good groundwater quality for sanitation hygiene purposes.

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