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Ani Tjitra Handayani
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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 11 Documents
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Search results for , issue "Vol 8 No 2 (2023): Energy Management and Sustainable Environment" : 11 Documents clear
KARAKTERISTIK MINERALOGI PADA VEIN TEMBAGA KLUWIH, PACITAN, JAWA TIMUR Verdiansyah, Okki
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The southern mountains of Java are a path of copper-gold mineralization that has proven to have high economic value. Pacitan is part of the geological system and mineralization of the southern mountains, which are part of the Sunda Arc magmatism. The research area is located in the copper mining location in Kluwih village, Tulakan, Pacitan, East Java. The presence of copper mineralization in the form of massive sulfide/sulfosalt veins in the Kluwih area is evidence of an epithermal mineralization system which is rare and has not been studied intensively. This study intends to carry out mineralogical tests both physically and chemically for the characteristics and mineralogical composition of vein in the Kluwih area. The research was conducted using geological mapping methods in mine tunnels, rock sampling, laboratory analysis using petrographic methods, ore microscopy, rock geochemistry using ICP OES/MS – XRF – AAS, mineralogy using SWIR and XRD spectral analysis. The geomorphology of the Kluwih area and its surroundings consists of the morphology of alluvial plains and intrusive hills. Lithology is composed of volcanic–subvolcanic rocks in the form of porphyry dacite, dacite, dacite breccia, and alluvium. Mineralization forms in structural openings that cut and alter dacite rocks and dacite breccias. The alteration that develops in the Kluwih area, especially in the area around the mine (tunnel) is dominated by kaolinite-illite, pyrophyllite-little-sericite, chloritization, and mineralization found in the form of veins that have massive sulphide composition with the dominant internal texture being breccia. The texture or structure of the mineralization is in the form of brecciation (hydrothermal breccia), sulfide-pyrophyllite-kaolinite, quartz- sulfide/sulfosalt, and massif sulfide/sulfosalt. The results showed that the ore had a density of 4.65 gr/cm3 while the highly argillic altered side rocks had a density of 2.54 gr/cm3. In the ore, visible massive sulfide/sulfosalt minerals consist of mosaic bonds and intergrowth between similar or different minerals. The detected ore minerals are pyrite, enargite, covellite, chalcopyrite, and bornite. Enargite and pyrite are the dominant metallic minerals found in ores. Enargite crystals appear to have a size of 56 - 160µm, pyrite accumulates in anhedral crystal forms with a size of 120 - 900µm and inclusions in enargite measuring 50 - 140µm, along with covellite-chalcopyrite ± bornite minerals with a fine size of 5 - 20µm. The geochemistry of the ore is seen as sulfide filling, as evidenced by the SiO2 value of only 4.5% followed by metal enrichment in the form of 27.6% Fe, 12.6% Cu, 4.15% As, and 46.2% S. Alteration minerals which is present is probably a mica group such as phengite with a marked presence of elements of 0.7% MgO and 1.9% Al2O3. The geochemistry of the side rock is seen to have a high SiO2 value of 71.7%, followed by a high alkaline element forming alteration minerals such as pyrophyllite with an Al2O3 value of 15.3% with a low total Ca-Na-K value of 0.25%, and there is residual TiO2 by 0.38%. Terraspectral analysis and XRD confirmed that the main peaks were pyrophilite-phengite, followed by the minerals enargite and pyrite. The Kluwih vein is a copper vein associated with advanced argillic alteration, as part of a rich high sulfidation epithermal system with Cu-Au-As-Sb mineralization.
DEPOSITIONAL ENVIRONMENT STUDY OF KASAI FORMATION LEBAN AREA AND SURROUNDINGS, RANTAU PANDAN DISTRICT, BUNGO DISTRICT, JAMBI Bagus, Bagus Adhitya; Khairina, Atika; Ahmad Mahbub, Itang
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The Leban area is one of the areas in Jambi which is very interesting for conducting geological studies related to sedimentology, tectonics and paleontology. One of the interesting objects to be reviewed is the Kasai Formation, where a description of this formation still requires further research. Here the study of the Kasai formation is viewed from its sedimentology, especially regarding the Depositional Environment. The Kasai Formation in the Leban and Surrounding Research Area, Bungo Regency, Jambi Province. From the stratigraphic cross-sectional measurements, 6 facies were found in each rock unit, namely the Planar cross-turf tuff (Sp) facies, the tuff sandstone (Sm) facies, the ripples cross lamination (Sr) sandstone facies, the very fine sandstone facies ( Sm) and the Tuff Claystone Facies (Fm).
ANALISIS KEAUSAN PAHAT ENDMILL HSS FLUTE 4 PADA PROSES MILLING HANDLE SEPEDA MOTOR Taufik Rohman, Fikri; Abizar, Haris
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Industri manufakrur semakin pesat dan berkembang pada era globalisasi maka inovasi sangat diperlukan dan menunjang serta mendukung proses manufaktur. Penelitian ini bertujuan untuk mengetahui nilai keausan pahat Endmill Flute 4 pada proses CNC Milling pada benda kerja handle sepeda motor. Metode yang digunakan dalam penelitian kali ini ialah eksperimen, desain yang digunakan kajian ini dengan menggunakan eksperimen percobaaan yang diberi perlakuan. Pengambilan data nilai keausan umur pahat pada proses CNC Milling Tipe VPS 850 dengan variasi 10 kali proses percobaan pada benda kerja jenis Handle RH/LH. Hasil dari penelitian ini ialah bahwa pada pengujian berat end end mill mempunyai selisih berat dengan rata rata end mill cutter sebesar 0, 08 gram, serta pada pengujian suhu endmill mempunyai jumlah selisih suhu dengan rata rata end miil cutter sebesar 2,29 derajat celcius. Kenaikan suhu mempengaruhi keausan pahat dengan berkurangnya berat pahat, yang disebabkan pada proses penyatan atau pemotongan yang tinggi menimbukan panas dan naiknya suhu akibat gesekan pahat dan benda kerja. Semakin banyaknya percobaan endmill, menimbukan gesekan yang yang signifikan. Hingga keausan pada pahat tampak jelas perubahan bentuk dari pahat end mill ini buktikan dari keausan kawah pahat dan keausan tepi pahat yang cukup berdampak pada daya makan pahat.
ANALISIS PENGARUH SUDUT BEVEL DAN POLARITAS TERHADAP DEFECT PADA TEMBUSAN HASIL PENGELASAN SMAW Novansyah, Fauzan; Ihsan Rijal, Maulana; Yhuto Wibisono Putra, Ananda; Aryaguna, Rasendriya; Yuga Pranata, Ridwan
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

SMAW (Shielded Metal Arc Welding) is one of the most frequently used welding methods in industry. One of the causes that affect the quality of SMAW welding Results is the bevel angle and polarity used. The research method used in this study is an experiment with a qualitative approach. This study aims to explore and analyze the effect of bevel angle and polarity on defects in SMAW welding translucent. The Results show that specimens with positive polarity (DCEP) produce more defects in the weld penetration than those with negative polarity (DCEN), both in terms of quality and quantity. then an analysis of the variation of the angle used can be seen that an angle of 30° produces better weld penetration Results in terms of quality and quantity. so as to minimize defects in the Results of weld penetration the recommended parameters that can be used are a bevel angle of 30° and negative polarity (DCEN).
PERENCANAAN PENGEMBANGAN ASET FASILITAS HUTAN KOTA PATRIOT BINA BANGSA BEKASI BERDASARKAN PLACEMAKING Melati Realita; Angestiwi, Tiafahmi
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Hutan Kota Bekasi merupakan salah satu Ruang Terbuka Hijau (RTH) dengan luas 42.673 m2. Di Hutan Kota Patriot Bina Bangsa Bekasi, aset fasilitas yang tersedia berkualitas buruk. Pengembangan aset fasilitas dilaksanakan berdasarkan konsep Placemaking berdasarkan kriteria Access and Linkages, Comfort and Image, Uses and Activities, dan Sociability. Tujuan proyek ini adalah untuk menghasilkan rencana pengembangan aset fasilitas dan besarnya estimasi biaya. Metode analisis menggunakan analisis deskriptif dengan pendekatan kualitatif dan kuantitatif. Teknik pengumpulan data meliputi observasi dan wawancara. Proyek ini menghasilkan desain berdasarkan kriteria Access and Linkages meliputi jalur pejalan kaki dengan luas 1040 m2 dan area parkir dengan luas 587,08 m2. Rencana Comfort and Image dengan menyediakan mushola 49,5 m2, toilet 71,58 m2, bangku taman 26 unit, tempat sampah 26 unit, lampu taman 52 unit, pos jaga 4 m2 dan CCTV 4 unit. Kriteria Uses and Activities direncanakan ruang bermain anak dengan 3 unit fasilitas jungkat-jungkit, 2 unit ayunan, dan 1 set taman bermain anak. Ruang olahraga direncanakan dengan fasilitas jogging track 500 m2, outdoor fitness, dan lapangan basket 420 m2. Dan ruang rekreasi direncanakan fasilitas paintball berukuran 50 x 20 m. Sedangkan sebagai kriteria Sociability direncanakan fasilitas ampiteater dengan luas 225 m2. Estimasi biaya pembongkaran, pembangunan, dan biaya pengadaan jika terealisasi pada tahun 2023 adalah Rp5.538.640.885. Kata kunci: Aset Hutan Kota, Kualitas RTH, Placemaking, Perencanaan, Pengembangan
ANALISIS MINERAL BIJIH, PARAGENESIS, DAN TEKSTUR ENDAPAN MANGAN DI DESA TEBBA KECAMATAN SALOMEKKO KABUPATEN BONE Wakila, Muhamad Hardin Wakila; Harwan; Iqbal Rustam, Muhammad
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Sekitar 92% konsumsi mangan secara global berkaitan langsung dengan industri baja dan sisanya digunakan dalam aplikasi nir besi seperti baterei sel kering, bahan pewarna dan industri kimia lainnya. Provinsi Sulawesi Selatan memiliki potensi sumberdaya mangan yang tersebar di beberapa Daerah, Namun belum ditemukan penelitian tentang potensi mangan di Kab. Bone, Provinsi Sulawesi Selatan, yang mana di Desa Tebba, Kec. Salomekko, Kab. Bone ditemukan singkapan batuan pembawa mangan. Penelitian ini bertujuan untuk mengetahui mineral bijih dan asosiasi, menentukan tekstur dan paragenesis dari endapan mangan. Metode penelitian yang dilakukan yaitu pengambilan sampel, analisis Mineragrafi dan Mineral bijih yang ditemukan yaitu Pyrochorite, Pyrolusit, dan Rhodocrosite. Untuk mineral asosiasi yang ditemukan yaitu: kuarsa, albit, aragonit, klorit, arsenopirit, dan kalkopirit. Tekstur endapan mangan yaitu, tekstur Replacement dan Intergrowt. Paragenesis endapan mangan yaitu Pyrolusit tahap 1 Intergrowt tahap 2 Intergrowt. Rhodonite tahap 1 tidak ada, tahap 2 Replacement. Rhodochrosite tahap 1 Intergrowt, tahap 2 Replacement.
DESAIN ALAT CUCI TANGAN OTOMATIS PORTABLE DENGAN SENSOR GERAKAN INFRAMERAH Hasta Kuntara; Anjab Thobarani, Muhammad
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstrak Desain ini bertujuan untuk menghasilkan alat cuci tangan otomatis portable dengan sensor gerakan untuk membuka saluran air dan sabun. Alat ini dapat memberikan kemudahan dan keheginisan karen tidak memerlukan menyentuh atau membuka saluran air dan sabun, dimana posisi tersebut rentan terhadap penyebaran virus bagi penggunanya. Model otomatis dari kran air otomatis dan sabun secara portable masih terbatas keberadaanya. Cakupan desain adalah penggunaannya tanpa menyentuh pembuka saluran air dan saluran sabun, alat dapat dipindahkan dengan mudah sesuai kebutuhan penempatan, air tersedia dalam tangki maupun terhubung langsung dengan sumber, air cucian ditampung dalam tangki atau disalurkan ke penampung penampung, catu daya listrik PLN, dan ketinggian alat sesuai bagi orang dewasa dan anak. Desain ini menghasilkan alat cuci tangan otomatis portable dengan ukuran tinggi bak cuci yaitu 1.020 mm, lebar 460 mm dan tinggi keseluruhan 1.475 mm, dengan sensor gerakan infrared dan control dengan arduino uno dan dengan penggerak saluran air serta sabun menggunakan motor servo. Kata kunci: Otomatis, Portable, Infrared, Arduino uno
KAJIAN LAJU INFILTRASI TANAH DAN PENGGUNAANNYA DI DESA NGALANG, KECAMATAN GEDANGSARI, KABUPATEN GUNUNGKIDUL Fitrah, Dimas Pratama; Budianta, Wawan
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Meningkatnya pertumbuhan penduduk membuat pengelolaan lahan harus dilakukan dengan baik. Dalam mengelola lahan, salah satu aspek terpenting adalah daya resap tanah atau infiltrasi. Faktor yang dapat mempengaruhi infiltrasi di antaranya yaitu litologi, jenis tanah, dan sifat fisik tanah (kandungan air, porositas, rasio pori, dan derajat saturasi). Pengujian dilakukan pada 32 titik di Desa Ngalang, Kecamatan Gedangsari, Kabupaten Gunungkidul. Pengukuran laju infiltrasi dilakukan dengan turf-tec infiltrometer dan dihitung menggunakan model infiltrasi Philips dan Kostiakov yang diklasifikasikan dengan klasifikasi Kohnke (1968). Semua parameter dikorelasikan secara overlay dan grafik terhadap laju infiltrasi model Philips yang dinilai lebih baik dibanding model Kostiakov. Hasil korelasi menunjukkan semua parameter memiliki pengaruh terhadap laju infiltrasi. Parameter jenis tanah memiliki hubungan terkecil dengan nilai R2 yaitu 0,0054, sedangkan rasio pori memiliki hubungan terbesar dengan nilai R2 yaitu 0,2603. Berdasarkan laju infiltrasinya, penggunaan lahan daerah penelitian dibagi menjadi empat, yaitu area pertanian dan penggembalaan, perkebunan, perladangan, dan recharge area.
METODE NUMERIK UNTUK ANALISIS KUALITAS SISTEM KELISTRIKAN BANDARA YOGYAKARTA INTERNATIONAL AIRPORT Dulhadi, Dulhadi; Arsyad, Mohammad; Afifudin, Shodiq; Andranetta Gracelynne Eka Pramudita, Eufrasia; Putra Pratama, Hafiyyan; Indriati Hadi Putri6, Dewi
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Kualitas distribusi energi listrik secara praktis ditentukan dari drop tegangan dan faktor daya. Batasan drop tegangan terstandar 10% < tegangan kerja nominal < 5% dan faktor daya terendah 0,85. Untuk menganalisa kualitas sistem kelistrikan Bandara Yogyakarta International Airport (YIA) diperlukan perhitungan aliran daya yang tepat diantaranya penerapan metode Newton Raphson, Fast Decouple dan Gauss – Seidel. Tingkat kerumitan penyelesaian aliran daya sistem kelistrikan Bandara YIA secara manual cukup tinggi. Oleh karenya program aplikasi Etap versi 12.6 dapat menyelesaikan permasalah tersebut. Dengan membandingkan ketiga metode tersebut, pada iterasi 99, indeks presisi 10-4 metode Newton Raphson dan Fast Decouple memiliki kesederhaaan implementasi, effisiensi perhitungan dan keandalan yang tinggi dibandingkan Gauss – Seidel. Hasil running Newton Raphson dan Fast Decouple memiliki kesamaan hasil yaitu faktor daya dibawah standar 5 titik beban dari 41 titik beban (12,19%) dan drop tegangan tertinggi 2,48 %, Gauss-Seidel dengan iterasi 2000, nilai indeks prsisi 10-6 menghasilkan 7 titik beban (17,07%). Dengan demikian metode Newton Raphson atau Fast Decouple dapat digunakan untuk analisa kualitas sistem kelistrikan Bandara YIA. Kesimpulan hasil running menyimpulkan bahwa kondisi kualitas sistem kelistrikan Bandara YIA masih diatas standar.
THE DEVELOPMENT OF MOBILE APPLICATION FOR DENGUE SITE INSPECTION IN JOHOR BAHRU Noor Azmy, Suzanna; Huda Hashim, Nur Zarifah; Abd Wahid, Ainulbariah; Rizal Toha, Haidar
KURVATEK Vol 8 No 2 (2023): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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This study focuses on developing a user-friendly mobile application for dengue site inspection, aiming to address the persistent threat of vector-borne diseases in Malaysia. The current practice of dengue site inspection is still using paper-based method, which is inefficient, prompting the need for a mobile app solution. Existing methods for identifying and destroying breeding grounds, known as Destruction Action the Breeding Place (Pemusnahan Tempat Pembiakan, PTP), face constraints due to limited technology and information facilities. This leads to incomplete eradication and the need for repeated operations in the same areas, resulting increased in operational costs. To address these issues, a simple and user-friendly mobile application is designed to enhance field data entry, enable location tracking, and provide easy access to operational data from the inspection site. To reduce the effort on site record-keeping, the application is developed on the cost-effective open-source platform - QGIS, and QField. The aim is to improve the accuracy of PTP activities based on mobile application data and increase productivity through direct data entry in the field. The objectives of this study are to identify the requirements of a mobile application for dengue site inspection, develop a mobile application with location tracking enablement, and validate the results and effectiveness of the developed mobile application. The implemented apps were tested on the field by the health officer and 98% of them agree that the application does help the process of dengue site inspection and has significantly improved their workflow. The mobile application provided them with a user-friendly interface and streamlined data entry process, allowing them to easily capture and update information during dengue site inspections. The integration of location tracking capabilities also enabled them to accurately identify and record the precise coordinates of potential breeding sites. Overall, the positive feedback from the health officers demonstrates the effectiveness and usefulness of the developed application in enhancing the efficiency and effectiveness of dengue site inspections. The application aligns with the Sustainable Development Goal of Good Health and Well-Being and contributes to the digitalization process of the Fourth Industrial Revolution (Industry 4.0), aiming at reducing long-term operating costs.

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