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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 152 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; Ashabul Ababekar
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 Wirawan Setyo Prakoso; Alva Rischa Qhisthana Pratika
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; Wirawan Setyo Prakoso
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 adanya peningkatan tekanan intraokular yang menyebabkan kerusakan saraf optik dan dapat menyebabkan kebutaan secara permanen. Untuk mendeteksi glaukoma, dokter mata umumnya menghitung rasio Cup to Disc Ratio (CDR) melalui analisis citra fundus retina secara manual. Metode ini memerlukan waktu lama dan bergantung pada keahlian dokter, sehingga kurang efektif dan kurang akurat. Oleh karena itu, diperlukan sistem otomatis yang dapat mendeteksi glaukoma dengan akurat dan efisien. Penelitian ini bertujuan untuk menyebarkan jumlah dan kombinasi fitur ekstraksi 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 jumlah data inputan 160 citra, 80 citra normal dan 80 citra glaukoma. Pada penelitian ini menghasilkan akurasi sebesar 97.50% dengan kombinasi fitur ekstraksi ciri CDR dan VCDR
Simulasi Desain Sistem 1D Vibration Assisted Machining pada Pemesinan Milling Adinda Rahmah Shalihah; Ridho Hans Gurning; Agil Wirandhanie; Fais Ramadan
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) adalah suatu metode pemotongan dengan ditambahkan getaran pada mata pahat atau benda kerja dengan frekuensi dan amplitudo tertentu untuk meningkatkan performa pemotongan dan kualitas permukaan hasil pemesinan. VAM dapat diterapkan pada beberapa proses pemesinan seperti drilling, turning, grinding, dan milling. Berdasarkan arah getaran yang dihasilkan, terdapat dua tipe yaitu 1D VAM dimana arah getaran searah dengan sumbu aktuator, dan 2D VAM dimana arah getaran membentuk pergerakan elips. Baik penerapan 1D VAM maupun 2D VAM pada proses pemesinan milling masih terbilang minim. Untuk itu, tujuan dari penelitian ini adalah untuk menghasilkan alternatif desain sistem 1D VAM dengan menggunakan piezoelectric ring actuator sebagai komponen utama penghasil getaran. Desain yang diusulkan kemudian dilakukan simulasi berupa simulasi modal dan simulasi harmonic response dengan menggunakan metode Finite Element Analysis (FEA). Flexure hinge juga diterapkan pada desain yang diusulkan dengan dimensi ketebalan sebesar 5 mm dan radius notch sebesar 5 mm. Hasil yang didapatkan adalah desain ini mampu bekerja secara optimal pada frekuensi kerja 17.510 Hz dengan perpindahan amplitudo pada sumbu Z sebesar 0,0000094 mm, dan nilai dari equivalent von mises stress maksimum sebesar 24,447 MPa, membuat desain ini layak untuk dilakukan uji eksperimental kedepannya.
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 Nandang Setiawan; Giarto; Atin Sumihartati; Sajinu AP; Dody Mustofa
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

ABSTRAK Penggunaan Alat Tenun Bukan Mesin (ATBM) oleh pelaku IKM Tekstil tradisional masih banyak dan tersebar di berbagai wilayah Indonesia. Alat tenun ini dapat dipergunakan untuk memproduksi kain tenun tradisional dan kerajinan tekstil lainnya. Sistem penyisipan pakan dengan teropong pada ATBM telah diakui sebagai sebuah kemajuan signifikan dan berdampak besar terhadap teknologi pertenunan. Telah dilakukan penelitian dan pembuatan purwa rupa ATBM yang dengan cara memodifikasi bagian laci sehingga memungkinkan penggunaan tiga buah teropong saat menenun. Penelitian ini bertujuan untuk mengukur usability ATBM multi teropong saat dipergunakan untuk membuat kain dengan motif warna ke arah lebar. Empat orang operator ATBM direkrut sebagai responden untuk melakukan percobaan. Keempat responden diminta untuk membuat kain bermotif tiga warna pakan dan merespon 30 pernyataan dalam kuesioner USE yang mendeskripsikan variabel usefulness, ease of use, ease of learn dan satisfaction. Hasil pengolahan data menunjukkan bahwa tingkat usability ATBM tiga teropong memperoleh persentase 62,78% (kategori layak). Keywords: ATBM, ATBM Tiga Teropong, usability
PERBANDINGAN PERHITUNGAN PERPINDAHAN PANAS PADA PERISAI DENGAN MENGGUNAKAN METODE ELEMEN HINGGA DAN METODE SELISIH HINGGA Zainuddin Husainy; Dinda Fardilla
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 Darasita Zahra Dayanun
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 Anita Pratiwi; 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

Proper environmental sanitation is an essential component in ensuring a healthy and safe quality of life for communities. Taipa Subdistrict in Palu City has experienced significant growth in infrastructure and population; however, challenges remain in the areas of sanitation and household waste management. This study aims to evaluate the environmental sanitation conditions in Taipa and their impact on public health. The research employed a descriptive quantitative method using a survey approach conducted on 512 households through field observations, interviews, and questionnaires. The results revealed that most residents rely on bore wells as their main sources of clean water and drinking water, while the use of piped water (PDAM) remains limited. Nearly all households have access to healthy latrines and use septic tanks for fecal waste disposal. However, the management of used cooking oil and the practice of open burning of waste remain environmental concerns that require attention. The majority of houses have floors and walls that meet environmental health standards. These findings indicate that although basic sanitation has been categorized as fairly adequate, efforts in public education and improvement of waste management systems are still needed to ensure sustainable environmental health in the community.
ANALISIS KEBERHASILAN PENERAPAN PERATURAN WALI KOTA PALU NOMOR 40 TAHUN 2021 TENTANG PEMBATASAN PENGGUNAAN KEMASAN PLASTIK SEKALI PAKAI DAN STYROFOAM Siti Rahmatia Pratiwi; 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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