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Tri Susilawati
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Jl. Raya Olat Maras Batu Alang, Pernek, Kec. Moyo Hulu, Kabupaten Sumbawa, Nusa Tenggara Barat
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Hexagon
Published by Universitas Teknologi Sumbawa
ISSN : 27213714     EISSN : 27213188     DOI : https://doi.org/10.36761/hexagon
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering
Hexagon Jurnal Teknik dan Sains, Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa hadir sebagai salah satu wadah yang menyajikan pemikiran hasil penelitian dalam bidang keilmuan teknik dan sains. Dimana, Jurnal yang di Kelola oleh Fakultas Teknologi Lingkungan dan Mineral ini memiliki ruang lingkup keilmuan dari teknik dan sains. Selain keilmuan Teknik, Jurnal Hexagon juga menyajikan hasil penelitian dalam ruang lingkup untuk bidang sains. Untuk waktu publikasi, Hexagon Jurnal Teknik dan Sains terbit 2 (dua) kali dalam setahun pada Semester Ganjil di bulan Januari dan pada Semester Genap di bulan Juli. Dan memiliki ISSN Cetak : 2721-3714 dan ISSN Online : 2721-3188
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 132 Documents
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The ERGONOMIC ANALYSIS MARAS BETON WORKERS TO MINIMIZE LOW BACK PAIN USING THE RECOMMENDED WEGHT LIMIT (RWL) METHOD: ANALISIS ERGONOMI PADA PEKERJA CV. MARAS BETON UNTUK MEMINIMALISIR LOW BACK PAIN MENGGUNAKAN METODE RECOMMENDED WEGHT LIMIT (RWL) Nurul Hudaningsih; Ababekar, Ashabul
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5415

Abstract

CV Maras Beton is one of the paving block producers in Sumbawa Regency. Some work activities at CV Maras Beton use machines, but some use employees' physical strength. It was found from interviews with workers that several workers who handled physical work activities experienced pain in the shoulders, thighs, waist, and legs. Namely the work of lifting sand, removing stone ash, lifting dry paving blocks, and lifting paving blocks from the machine to the hand pallet. Therefore, an ergonomic analysis was conducted on these workers to minimize work-related illnesses, including low back pain. This research uses a biomechanical approach with the Recommended Weight Limit (RWL) method. Based on the research results, it was concluded that there was one job that was categorized as high risk, namely the sand removal process. Another job categorized as medium risk is lifting paving blocks from the machine to the hand pallet. Two other jobs, namely removing stone ash and removing dry paving blocks, are categorized as low risk. So the work that requires urgent repairs is sand removal activities.
KLASIFIKASI CITRA ULTRASONOGRAFI UNTUK DETEKSI NODUL TIROID BERDASARKAN ECHOGENICITY Prakoso, Wirawan Setyo; Qhisthana Pratika, Alva Rischa
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5052

Abstract

One of the important features for diagnosing malignant thyroid nodules is based on their echogenicity characteristics, namely the grey intensity of each nodule. Therefore, computer-aided diagnosis (CADx) is required to select important features and classify nodules that are more likely to be malignant or benign and the form of treatment is known. This study proposes classifying thyroid nodules based on texture features from histogram, GLCM and GLRLM into 4 classes: anechoic, hyperechoic, hypoechoic and very hypoechoic. Ultrasound is the best way to filter information about the characteristics of the degree of malignancy of thyroid nodules used by doctors. The doctor's decision takes a long time. Early detection is necessary, so that doctors can provide treatment and prevention quickly. This study uses machine learning for early detection of the level of malignancy of thyroid nodules using ultrasound images with a dataset obtained from Sardjito Hospital, Yogyakarta Radiology Department. The results showed that the Linear SVM method is the best method to classify the level of malignancy of thyroid nodules based on the dataset which has been divided into 4 classes with 64 features resulting in an accuracy of 68.3%, a positive predictive value of 70% and a sensitivity value of 68%. Keywords: Ultrasound, Thyroid nodules, Classification, Early detection of disease, Feature extraction, Machine learning techniques, SVM echogenicity classification.
Pendeteksian Glaukoma Menggunakan Artificial Neural Network dengan Analisis Optic Cup dan Optic Disk pada Citra Fundus Retina Alva Rischa Qhisthana Pratika; Prakoso, Wirawan Setyo
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5099

Abstract

Glaukoma merupakan penyakit mata dengan peningkatan tekanan intraokular yang menyebabkan kerusakan saraf optik dan dapat mengakibatkan kebutaan permanen. Untuk mendeteksi glaukoma, dokter spesialis mata umumnya menghitung Cup to Disc Ratio (CDR) melalui analisis citra fundus retina secara manual. Metode ini membutuhkan waktu yang lama dan mengandalkan keahlian dokter sehingga kurang efektif dan akurat. Oleh karena itu, diperlukan suatu sistem otomatis yang dapat mendeteksi glaukoma secara akurat dan efisien. Penelitian ini bertujuan untuk mengevaluasi jumlah dan kombinasi fitur terekstraksi terbaik dalam mendeteksi glaukoma, dengan menggunakan fitur-fitur seperti Rim to Disc Ratio (RDR), Cup to Disk Ratio (CDR), Vertical Cup to Disc Ratio (VCDR), Horizontal Cup to Disc Ratio (HCDR), dan Horizontal to Vertical CDR (HV CDR), serta mengimplementasikan metode klasifikasi Artificial Neural Network (ANN) Back Propagation dengan total data masukan sebanyak 160 citra, 80 citra normal dan 80 citra glaukoma. Penelitian ini menghasilkan akurasi sebesar 97,50% dengan kombinasi CDR dan VCDR.
Simulasi Desain Sistem 1D Vibration Assisted Machining pada Pemesinan Milling Shalihah, Adinda Rahmah; Gurning, Ridho Hans; Wirandhanie, Agil; Ramadan, Fais
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5105

Abstract

Vibration Assisted Machining (VAM) is a cutting method with additional vibrations on the tool or workpiece with a certain frequency and amplitude to improve the machining results' cutting performance and surface quality. VAM can be applied to several machining processes, such as drilling, turning, grinding, and milling. Based on the given direction, there are two types, 1D VAM where the vibration aligns with the actuator's axis, and 2D VAM where the vibration direction forms an elliptical movement. Both the application of VAM types in the milling process are still relatively minimal. Therefore, this study aims to present a 1D VAM system design using a piezoelectric ring actuator as a vibration device. The proposed design undergoes modal simulation and harmonic response simulation using Finite Element Analysis (FEA) method. A flexure hinge with a thickness of 5 mm and a notch radius of 5 mm is applied to the design. The results indicate that the proposed design operates optimally at a working frequency of 17,510 Hz, with a displacement amplitude of 0.0000094 mm along the Z-axis and a maximum equivalent von Mises stress value of 24.447 MPa. These results suggest that the design is viable for future experimental testing.
PENGEMBANGAN SISTEM ELEKTROPNEUMATIK BERBASIS OPC DAN IOT PADA KASUS CLAMPING UNIT FOR GRINDING MENGGUNAKAN PLC SIEMENS S7-1200 DAN NODE-RED Muslimin; Taufik Muchtar; Atikah Tri Budi Utami; Lutfi; Asnawi Husain
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5129

Abstract

Penelitian ini bertujuan mengembangkan sistem elektropneumatik berbasis OPC dan IoT pada clamping unit for grinding menggunakan PLC Siemens S7-1200 dan Node-RED untuk meningkatkan efisiensi dan kualitas proses manufaktur. Studi kasus yang dilakukan pada TP 202 Electropneumatics memberikan konteks praktis penerapan sistem kontrol sekuensial, yang melibatkan komponen elektropneumatik untuk menjaga stabilitas benda kerja selama proses penggilingan. Metode yang digunakan adalah Research and Development (R&D) dengan pendekatan DEDTE (Define, Explore, Design, Test, dan Evaluate). Pada tahap Define, sistem yang melibatkan tiga silinder pneumatik dan PLC Siemens S7-1200 dipilih sebagai fokus penelitian. Explore dilakukan dengan analisis kebutuhan I/O untuk menentukan tag variabel yang digunakan dalam perancangan sistem. Pada tahap Design, diagram pengkabelan dibuat dan sistem dikembangkan dalam tiga mode: simulasi, semi simulasi, dan fisik. Pada tahap Test, pengujian konektivitas antara PLC, OPC server (KEPServerEX), dan Node-RED menunjukkan sebagian besar koneksi berhasil, meskipun ada kegagalan kecil. Pada tahap Evaluate, saran perbaikan diberikan untuk pengaturan jaringan dan penyempurnaan antarmuka HMI. Hasil penelitian menunjukkan bahwa pengembangan sistem ini berhasil meningkatkan pemahaman mahasiswa tentang otomasi industri dan dapat diterapkan dalam konteks industri 4.0. Saran perbaikan meliputi pengujian lebih lanjut terhadap pemrograman PLC, optimasi mode simulasi, dan penyempurnaan antarmuka pengguna untuk meningkatkan keandalan dan kemudahan penggunaan sistem.
Pengukuran Usability Purwa Rupa ATBM Tiga Teropong Dengan Metode USE Setiawan, Nandang; Giarto; Sumihartati, Atin; AP, Sajinu; Mustofa, Dody
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5145

Abstract

ABSTRACT The use of hand looms - Alat Tenun Bukan Mesin (ATBM) in Indonesian textile SMEs spread across various regions in Indonesia. The ATBM can be used to produce traditional woven cloth and other textile crafts. The shuttle weft insetion system in ATBM is recognized as a revolutionary step and has a major impact on traditional weaving. A research on a prototype of an ATBM has been carried out by modifying the drawer section so that it is possible to use the three-shuttles while weaving. This research aims to measure the usability of the three-shuttles ATBM to make fabric with color motifs in the width direction. Four operators were recruited as respondents to conduct the experiment. The respondents were asked to weave the yarn dyed fabric with three weft colors and to respond the 30 item statements in the USE questionnaire that described four variables : usability, ease of use, ease of learn and satisfaction. The results showed that the level of usability of the three-shuttles ATBM was 62,78% (feasible). Keywords: ATBM, The three-shuttles ATBM, usability.
PERBANDINGAN PERHITUNGAN PERPINDAHAN PANAS PADA PERISAI DENGAN MENGGUNAKAN METODE ELEMEN HINGGA DAN METODE SELISIH HINGGA Husainy, Zainuddin; Fardilla, Dinda
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5747

Abstract

The presented journal concerns calculations of heat transfer in a shield with use of two methods: finite element method and finite difference method. The comparison of heat transfer calculation of the selected problem is performed for a rectangular isotropic shield with the dimensions of 6 m x 4 m, with a rectangular hole with the dimensions of 2 m x 1 m. The shield was divided into 0.25 m x 0.25 m rectangular elements and 0.25 m x 0.25 m triangular elements for calculations in the finite element method and 0.25 m x 0.25 m rectangular elements for calculation in the finite difference method. The rectangular finite element model has 404 nodes, 352 elements, while the triangular finite element model has 404 nodes, 704 elements; the finite difference model has 445 nodes. Heat conductivity coefficients for the shield are 1.2 W·m–1·K–1 in both x and y directions. Prescribed boundary conditions are: top edge temperature 43 °C, bottom edge temperature 3 °C, left edge convection heat transfer coefficient a = 2.3 W·m–2 and ambient temperature Ta = 47 °C, right edge radiation heat flux density q = 3.8 W·m–2, 4 insulated hole edges. The shield has 2 point heat discharges: 5 W located in the point with coordinates (0.5 m, 0.5 m) and 11 W located in the point with coordinates (5.0 m, 1.0 m). The shield thickness is 1 m. The results of calculations are presented in 3 graphs in the form of contour maps. The comparison shows that the results given by the finite element method with use of the rectangular finite elements and triangular finite elements as well as by the finite difference method are similar which allows to conclude that the calculation results are trustworthy and have been done correctly. It is also confirmed by the energetic balance performed for the finite element method.
PENGARUH RASIO KOMPOSISI LIMBAH PLASTIK DAN SERBUK KAYU TERHADAP KARAKTERISTIK MEKANIK KUAT TEKAN SEBAGAI MATERIAL BANGUNAN RINGAN Dayanun, Darasita Zahra
Hexagon Vol 6 No 2 (2025): Vol. 6 No. 2 (2025): HEXAGON - Edisi 12
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i2.5803

Abstract

This study aims to examine the effect of the ratio of plastic waste and sawdust on the mechanical characteristics of alternative lightweight building materials. Plastic waste is used as a thermoplastic binder, while sawdust acts as a lightweight aggregate with insulating properties. The composition of the mixture is varied in several ratios (90:10, 80:20 and 70:30) to determine its effect on the mechanical properties of compressive strength test specimens according to SNI 03-3958:1995 from the resulting mortar product. The manufacturing process involves mixing melted plastic waste with sawdust, then molding and releasing. The test results show that increasing the proportion of sawdust can significantly reduce the compressive strength. Conversely, a higher plastic ratio increases the compressive strength but produces a heavier material. The optimum composition was found at a ratio of 90:10 (plastic: sawdust), which provides a balance between strength, lightness, and insulating properties. This study shows the potential for utilizing plastic waste and sawdust as environmentally friendly building materials with feasible functional performance and in accordance with compressive strength standards.
KUALITAS SANITASI LINGKUNGAN TEMPAT TINGGAL MASYARAKAT DI KELURAHAN TAIPA KOTA PALU Pratiwi, Anita; Andi Iin Nindy Karlinda Kadir; Awwalini Maghfirah Salim; Darasita Zahra Dayanun; M.Marjan; Alricha
Hexagon Vol 6 No 2 (2025): Vol. 6 No. 2 (2025): HEXAGON - Edisi 12
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i2.5806

Abstract

Sanitasi lingkungan yang baik merupakan bagian penting dalam menciptakan kualitas hidup masyarakat yang sehat dan aman. Kelurahan Taipa di Kota Palu mengalami perkembangan infrastruktur dan jumlah penduduk yang cukup pesat, namun masih terdapat tantangan dalam aspek sanitasi dan pengelolaan limbah rumah tangga. Penelitian ini bertujuan untuk mengevaluasi kondisi sanitasi lingkungan masyarakat di Kelurahan Taipa serta dampaknya terhadap kesehatan masyarakat. Metode penelitian yang digunakan yakni deskriptif kuantitatif dengan pendekatan survei terhadap 512 kepala keluarga, yakni observasi lapangan, wawancara, dan kuesioner. Hasil penelitian menyatakan bahwa sebagian besar masyarakat menggunakan sumur bor sebagai sumber air bersih dan air minum, dengan penggunaan air PDAM yang masih terbatas. Hampir seluruh rumah tangga telah memiliki jamban sehat dan menggunakan tangki septik sebagai tempat pembuangan tinja. Namun, pengelolaan minyak jelantah dan kegiatan pembakaran sampah masih menjadi isu lingkungan yang memerlukan perhatian. Sebagian besar lantai dan dinding rumah telah memenuhi standar kesehatan lingkungan. Temuan ini menunjukkan bahwa meskipun sanitasi dasar telah dikategorikan cukup baik, masih dibutuhkan upaya edukasi dan perbaikan sistem pengelolaan limbah agar kesehatan lingkungan masyarakat dapat terjaga secara berkelanjutan.
ANALISIS KEBERHASILAN PENERAPAN PERATURAN WALI KOTA PALU NOMOR 40 TAHUN 2021 TENTANG PEMBATASAN PENGGUNAAN KEMASAN PLASTIK SEKALI PAKAI DAN STYROFOAM Pratiwi, Siti Rahmatia; Awwalini Maghfirah Salim; Darasita Zahra Dayanun; Anita Pratiwi; Ardini Wulandari; Fatimah Maulida
Hexagon Vol 6 No 2 (2025): Vol. 6 No. 2 (2025): HEXAGON - Edisi 12
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i2.5808

Abstract

Environmental pollution issue from solid waste, especially plastic, is a global concern because it harms ecosystems and human health. A major cause is the use of single-use plastics and styrofoam, which do not break down easily. In Palu City, this problem led to the issuance of Palu Mayor Regulation Number 40 of 2021 concerning the Restriction on the Use of Single-Use Plastic Packaging and Styrofoam. This study evaluates how well this policy has been implemented and its effect on reducing plastic waste. Using descriptive quantitative methods to analyze secondary data of waste generation and achievements in waste handling from the National Waste Management Information System (SIPSN) for the years preceding (2020) and following (2024) the regulation’s implementation. The results show a significant drop in plastic waste from 30.00% to 10.43%, along with decreases in daily and yearly waste amounts. The recycling rate also improved from 0.51 to 0.58, indicating an improvement in waste management, especially through the use of TPS3R. The study recommends stronger public education, better monitoring, and improved facilities to ensure the policy’s success and sustainability in Palu City.

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