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Manalu, Janviter
Universitas Cenderawasih
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Efek Sandblasting Terhadap Karakterisasi Pelapisan Coating 95MXC Pada Stainless Steel 304 Menggunakan Metode TWAS (Twin Wire Arc Spray) Puspitasari, Windy Desti; Fitriyana, Deni Fajar; Anis, Samsudin; Bahatmaka, Aldias; Irawan, Agustinus Purna; Siregar, Januar Parlaungan; Cionita, Tezara; Manalu, Janviter
Jurnal Rekayasa Mesin Vol. 19 No. 1 (2024): Volume 19, Nomor 1, April 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i1.5392

Abstract

Impeller adalah komponen utama pompa sentrifugal yang sering mengalami kegagalan seperti erosi, korosi dan kavitasi. Untuk mencegah kegagalan tersebut, salah satu cara yang digunakan adalah memberikan pelapis dengan metode TWAS. Pada penelitian yang telah ada, coating dengan metode TWAS menjadi salah satu pilihan yang banyak digunakan, namun belum banyak penelitian yang membahas mengenai pengaruh pengulangan sandblasting pada coating metode TWAS. Penelitian ini bertujuan untuk mengetahui pengaruh pengulangan sandblasting pada impeller pompa berbahan baku stainless steel 304 dengan metode Twin Wire Arc Spray Coating dengan NiAl sebagai bond coat dan FeCrBSiMn sebagai top coat. Penelitian ini menggunakan spesimen tanpa diberikan pelapisan dan spesimen tebaik yakni yang diberi pelapisan dengan satu pengulangan sandblasting. Karakterisasi dilakukan untuk mengetahui kekasaran permukaan (ISO 8503), kekerasan lapisan (ASTM E384), coating (ASTM D4541), dan laju korosi (ASTM G102). Pengujian SEM dan analisis ImageJ dilakukan untuk mengetahui struktur lapisan. Hasil penelitian menunjukan sandblasting dengan satu pengulangan memiliki hasil kekasaran permukaan dan ketebalan lapisan terendah. Namun, memiliki hasil karakterisasi lapisan paling optimal dengan porositas dan unmelt terendah, kekerasan tertinggi dengan 1081.6 HV dengan coating yang sudah sesuai dengan standar yakni 14.5 MPa dan semakin banyak pengulangan sandblasting, semakin tinggi laju korosinya. Kesimpulan dari penelitian ini adalah satu pengulangan sandblasting dalam metode TWAS sudah memberikan kualitas terbaik yang dapat meningkatkan performa dan penggunaan impeller pompa.
Investigasi Pengaruh Penuaan Termal terhadap Sifat Mekanik Karpet Felt Polyethylene Terephthalate Laminasi dengan Low-Density Polyethylene untuk Aplikasi Pengembangan Produk Quarter Trim Panel Nugroho, Rizky Fajar; Deni Fajar Fitriyana; Samsudin Anis; Rahmat Doni Widodo; Janviter Manalu; Januar Parlaungan Siregar; Tezara Cionita; Mochamad Marte Ardhianto
Jurnal Rekayasa Mesin Vol. 20 No. 1 (2025): Volume 20, Nomor 1, April 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i1.6208

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh penuaan termal pada sifat mekanik karpet felt polyethylene terephthalate (PET) yang dilaminasi dengan low density polyethylene (LDPE) untuk pengembangan quarter trim panel kendaraan. Latar belakang penelitian berfokus pada pentingnya material interior otomotif yang tahan lama. polyethylene terephthalate (PET) dikenal memiliki stabilitas termal dan kekuatan tarik tinggi, sementara low density polyethylene (LDPE) menawarkan fleksibilitas. Namun, penelitian terkait kombinasi laminasi polyethylene terephthalate (PET) dan low density polyethylene (LDPE) dan dampak penuaan termal terhadap sifat mekaniknya masih terbatas. Metode penelitian mencakup persiapan spesimen, pengujian tarik sebelum dan setelah penuaan termal pada suhu 70 °C selama 72 jam dalam kondisi panas kering, serta analisis struktur molekuler. Hasil penelitian menunjukkan penurunan signifikan pada kekuatan tarik, di mana spesimen cross direction (CD) menurun dari 58,5 MPa menjadi 40 MPa, dan terjadi peningkatan modulus elastisitas sebesar 20%. Penurunan ini disebabkan oleh degradasi molekuler dan reorganisasi struktur amorf polyethylene terephthalate (PET) yang mengurangi kohesi antar molekul. Kesimpulannya, penuaan termal berdampak negatif pada sifat mekanik karpet felt polyethylene terephthalate (PET) yang dilaminasi low density polyethylene (LDPE). Penelitian ini memberikan wawasan penting untuk pengembangan material interior kendaraan yang lebih tahan lama dan menekankan perlunya peningkatan stabilitas termal pada laminasi (PET) dan low density polyethylene   (LDPE).
Penerapan Siklus Plan-Do-Check-Action untuk Mengurangi Cacat Permukaan pada Produk Outer Tube Model 2DP di PT. XYZ Putra, Naufal Bahy; Deni Fajar Fitriyana; Samsudin Anis; Rahmat Doni Widodo; Janviter Manalu; Januar Parlaungan Siregar; Tezara Cionita; Mochammad Marte Ardianto
Jurnal Rekayasa Mesin Vol. 20 No. 1 (2025): Volume 20, Nomor 1, April 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i1.6211

Abstract

Tingkat cacat permukaan pada outer tube model 2DP di area pemesinan PT.XYZ masih mencapai 3,91%, melebihi Key Performance Indicator (KPI) perusahaan sebesar 1,36%. Kajian terdahulu membuktikan efektivitas siklus Plan-Do-Check-Action (PDCA) di berbagai sektor, namun belum ada penelitian empiris yang memfokuskan penurunan cacat permukaan komponen otomotif pada proses pemesinan di Indonesia dan mengukur dampak langsung integrasi PDCA terhadap pencapaian KPI serta penghematan biaya perbaikan. Oleh karena itu, penelitian ini bertujuan untuk menurunkan cacat permukaan outer tube model 2DP mencapai KPI sebesar 1,36% dan menghemat biaya pengerjaan ulang. Metode yang digunakan dengan mengkombinasikan 8 Langkah Toyota Production System (TPS), diagram Pareto, dan diagram ishikawa untuk mengidentifikasi akar penyebab dan menetapkan prioritas perbaikan. Dengan melakukan perbaikan meliputi, pemotongan dua-tahap (roughing-finishing), modifikasi program turning, penggantian diameter tool rib, dan penggunaan jig semi-cavity, hasil penelitian menunjukkan penurunan tingkat cacat permukaan pada produk outer tube model 2DP dari 3,91% menjadi 1,32% serta memberikan penghematan biaya tahunan perusahaan hingga Rp. 600.780.000. Kesimpulannya, integritas siklus PDCA menggunakan 8 langkah TPS dan alat bantu kualitas efektif dalam meningkatkan kualitas produk dan efisiensi biaya di industri Otomotif. Penelitian ini memperluas bukti empiris lean manufacturing di industri otomotif di Indonesia, menyediakan kerangka praktis perbaikan berbiaya rendah namun berdampak tinggi serta integrasi dengan teknologi industri 4.0.
Strategi Penanganan Risiko Bencana Abrasi di Kawasan Pesisir Pantai Holtekamp Kota Jayapura Heri Purnomo; Janviter Manalu; Johnson Siallagan; Auldry F. Walukow; Maklon Warpur
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 3 (2025): Desember : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i3.6294

Abstract

Holtekamp Beach is a coastal area in Jayapura City that is very prone to abrasion due to sea waves because it is located directly opposite the Pacific Ocean. Abrasion and environmental damage on the coast of Holtekamp Beach are influenced by several interconnected factors that can have an impact on environmental problems. The research aims to analyze the impact of abrasion on the Holtekamp coastal area using survey and interview methods. Furthermore, data analysis is carried out by utilizing SWOT Analysis. This research was conducted from May to June 2025. The results showed that there are 4 (four) priority strategies that can be used as a basis for developing a strategy for Abrasion Disaster Risk Management Strategy in the Holtekamp Coastal Area of Jayapura City, namely; a) Increasing cooperation & coordination between stakeholders, namely the community and local government in achieving abrasion disaster management programs in the Holtekamp Coastal Area of Jayapura City; b) Optimizing supervision of development development/tourist lodges in the coastal area of Holtekamp Beach; c) Community participation is needed to maintain infrastructure that has been built and increase their awareness of environmental issues.d) Construction of wave breakers that function to reduce waves.
Ketangguhan Wilayah Distrik Sorong Timur terhadap Bencana Banjir Suharyadi Suharyadi; Janviter Manalu; Auldry F. Walukow; Johnson Siallagan; Maklon Warpur
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 3 (2025): Desember : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i3.6360

Abstract

Floods are one of the most common natural disasters and have a significant impact on the social, economic, and environmental aspects of society. This is particularly evident in the community of East Sorong District. East Sorong District is one of the areas frequently affected by floods, and this inevitably leads to numerous risks and consequences. There are several causes of flooding in the Sorong Timur District, including extreme rainfall, inadequate drainage systems due to trash blockages, uncontrolled land use changes resulting in overpopulation, and the loss of forest areas or green spaces that could function as water absorption zones. Additionally, the lack of flood control systems and weak oversight of development in flood-prone areas can exacerbate flood disaster risks. This study aims to analyze and measure the resilience of the Sorong Timur District in facing flood disasters through an evaluation approach focusing on infrastructure, service facilities, socio-economic factors, community capacity and preparedness, and institutional aspects. It was concluded that the infrastructure variable is still moderate, while the socio-economic variable, basic capacity, and community preparedness, as well as institutional capacity, are still low. Meanwhile, service facilities are also low. Overall, it can be concluded that the resilience of the Sorong Timur district in facing hydrometeorological disasters is weak.
Analisis Sifat Kandungan Kimia Dan Penggunaan Material Lokal Kinang Jingkion Sebagai Agregat Kasar Terhadap Karakteristik Campuran Laston (AC) WC Di Kabupaten Yalimo Ferdinand Putera Safanpo, Herman; Bahtiar, Bahtiar; B. J. Rusmanta, Yohanes; Rante, Harmonis; Safanpo, Apolo; Manalu, Janviter
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 4 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i4.930

Abstract

This study aims to analyze the nature of chemical content, analyze abrasion value and optimum asphalt content using local Kinang Jingkion as road pavement material. In this study, XRF and XRD testing methods were used to determine the chemical content of Kinang Jingkion local material, then testing the characteristics of rough aggregate to determine the abrasion value, testing fine aggregate characteristics, and testing asphalt pen 60/70 and marshall test to determine the optimum asphalt content (KAO). The tests obtained the results of comparative data analysis between laboratory tests and literature standards that meet the eligibility requirements. The results showed that: First, the results of XRF and XRD analysis on Wilihingke samples, 0.15 mm granules, 2.36 mm granules, and Kinang Holuwon found that all chemical elements contained in the four samples were solid metal inorganic chemical elements. The results of this analysis prove that the four samples, which are fine aggregates and coarse aggregates, do not contain organic substances. Where the results of this analysis are by the requirements of aggregates which are one of the components in the concrete mixture, where the aggregates used must meet certain conditions, one of which must not contain excess organic matter because it can undergo decay by bacteria using dissolved oxygen; Second, from the test results obtained, the aggregate wear value (abrasion) was 32.69%; Third, based on the test results, the value of the Marshall parameter with Optimum Asphalt Content (KAO) obtained a value of 6.125%.
Analysis of Kinang Jingkion Material as Road Subbase Layer Using Soil Cement Method Andrew Kristio Kandai, Rio; Bahtiar, Bahtiar; Rusmanta, Yohanes B. J.; Rante, Harmonis; Safanpo, Apolo; Manalu, Janviter
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 4 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i4.1016

Abstract

This research aims to analyze the California Bearing Ratio (CBR) and Unconfined Compressive Strength Test (UCS) values as road foundation layers using local materials, namely Kinang Jingkion. The soil and Kinang Jingkion materials for the study were taken from the Apalapsili quarry in Yalimo Regency. Additionally, the additive or soil stabilizer used was matos obtained from the testing of soil characteristics, including sieve analysis or gradation, Standard Proctor Test for light density, and liquid limit test. After testing, it was found that the soil from the Apalapsili quarry is granular soil and can be categorized as A-1-a according to SNI 03-6797-2002. Subsequent testing involved CBR and UCS testing on Mix Designs made of soil and cement with concentrations of 4%, 6%, and 8%. Next, additional Mix Designs were created with compositions of Kinang Jingkion, soil, cement at 4%, 6%, and 8%. Further Mix Designs included compositions of Kinang Jingkion, soil, matos at 2%, and cement at 4%, 6%, and 8%. From the UCS testing results, Mix Designs with soil and cement concentrations of 4% and 6% did not meet the compressive strength criteria, with compressive strength values of 9.26 Kg/Cm² and 17.4 Kg/Cm² respectively. According to SNI 6887-2012, the compressive strength value after 7 days of immersion should be within 25-35 Kg/Cm², while other Mix Designs met the criteria of SNI 6887-2012. CBR testing also utilized the same Mix Designs, and the highest CBR result was obtained from the Mix Design with compositions of Kinang Jingkion, soil, cement at 8%, and matos at 2%, with a CBR value of 112%. According to the 2018 Revised General Specifications, a CBR value of 112% indicates a Class A Foundation Layer.
KAJIAN KETERSEDIAAN DAN KEBUTUHAN LAHAN TEMPAT PEMAKAMAN UMUM DI DISTRIK SARMI, KABUPATEN SARMI Ronaldo Ruwayari, Daniel; Manalu, Janviter; Mujiati
Jurnal ELIPS (Ekonomi, Lingkungan, Infrastruktur, Pengembangan Wilayah, dan Sosial Budaya) Vol 8 No 1 (2025): Februari 2025
Publisher : Magister Perencanaan Wilayah dan Kota Universitas Cenderawasih

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

Abstract

The availability and need for land for Public Cemeteries (TPU) is becoming an i ncreasingly urgent issue,especially in areas experiencing population growth such as Sarmi District, Sarmi Regency. This study aims toevaluate the current availability of TPU land, plan land use patterns in accordance with the Regional SpatialPlan (RTRW), and analyze local government involvement in TPU management. The research approach used isdescriptive quantitative by utilizing primary and secondary data. Data collection techniques included fieldobservations, interviews and analysis of policy documents. Data analysis was conducted using the GeographicInformation System (GIS) method to identify alternative locations for new cemeteries and the geometricformula to project land requirements. The results show that TPU Mararena still has a land capacity of 1,434m², while TPU Sarmi Kota has exhausted its capacity with a total area of 14,051 m². Projections of landrequirements show the need for a new location with an area of around 10,000 m² to meet the needs of thecemetery in the long term. The new site needs to be designed based on spatial criteria, such as accessibility,integration of green spaces, and sustainability of management. This research emphasizes the importance ofcross-sectoral coordination between local governments, communities and customary institutions to createmore effective and environmentally friendly TPU management. New TPUs that support ecological, social, andaesthetic functions can be a sustainable solution to overcome the limitations of cemetery land in the future.
STRATEGI PENGENDALIAN BANJIR KOTA MERAUKE PROVINSI PAPUA SELATAN Gunawan Purba, Hisar; Mujiati; Manalu, Janviter
Jurnal ELIPS (Ekonomi, Lingkungan, Infrastruktur, Pengembangan Wilayah, dan Sosial Budaya) Vol 8 No 1 (2025): Februari 2025
Publisher : Magister Perencanaan Wilayah dan Kota Universitas Cenderawasih

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Abstract

This research aims to examine the Flood Control Strategy of Merauke City with the approach of existing drainageconditions, vulnerability testing and spatial planning policies of Merauke City. The background of the research departsfrom the increasing frequency of extreme rainfall and the threat of tidal flooding due to climate change and thecharacteristics of coastal geomorphology that trigger higher flood risks. This research uses descriptive and quantitativeapproaches. Data sources were obtained from primary data which were the results of interviews and fieldobservations while secondary data were obtained from relevant agencies. The results showed that the flood drainagechannel was not optimal, the vulnerability indicator of Merauke city was 2.2 on a scale of 4 with a moderate category,and the impact of changes in the RDTR of Merauke city in 2023. The height of flood water in Merauke city is still low(average 0.5 - 1m) but the flood area is increasing, especially in areas with high population density and low areas dueto land changes and residential development in infiltration / low areas. Flooding in the city of Merauke is due to highrainfall and overflow of water from the drainage as a result of siltation in the drainage and damage to severalfloodgates. The strategy to control flooding in Merauke city is by optimizing flood drainage channels and buildingretention ponds, especially in coastal, densely populated and low-lying areas, as well as by spatial planning for theprotection of infiltration zones and water boundaries in changing land functions and increasing public awareness inmaintaining the cleanliness of drainage channels
Analisis Multi-Kriteria dengan Pendekatan Analytical Hierarchy Process untuk Strategi Mitigasi dan Adaptasi Bencana Banjir di Distrik Nabire Kabupaten Nabire Husain, Husain; Johnson Siallagan; Janviter Manalu; Auldry F. Walukow; Basa T. Rumahorbo
METHOMIKA: Jurnal Manajemen Informatika & Komputerisasi Akuntansi Vol. 9 No. 2 (2025): METHOMIKA: Jurnal Manajemen Informatika & Komputersisasi Akuntansi
Publisher : Universitas Methodist Indonesia

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Abstract

Nabire Regency, Central Papua Province, has a high vulnerability to flooding due to significant rainfall intensity with type 1 Local Seasonal Zone, which only has one season throughout the year, namely the Year-Round Rainfall (HST) type, with an average rainfall of more than 300 mm per month, ranging from 344 mm to 522 mm per month. Risk analysis was conducted using the Analytical Hierarchy Process (AHP) method to determine the priority of factors causing flooding, including hydrological aspects, land use, infrastructure, and socio-economic impacts in a systematic manner. The results of this study indicate that the analysis of public perception of flooding disasters was conducted by modeling data using a Likert scale, which was processed computationally to generate patterns of public perception. The Analytical Hierarchy Process (AHP) method was used to determine the priority of data-based mitigation strategies. The results confirm that BPBD plays a dominant role in flood risk management through the integration of adaptive and sustainable environmental information systems.
Co-Authors Achmad Erlangga Bintang Samodra Adi, Markus Budi Agustinus Giai Agustinus Purna Irawan AKBAR SILO Al Ichlas Imran Aldias Bahatmaka Allo, Obed Rante Andrew Kristio Kandai, Rio Auldry Fransje Walukouw Ayomi, Erna Ferderika B. J. Rusmanta, Yohanes Bahtiar Bahtiar Basa T Rumahorbo Berlian Yonanda Andrianto Bernathius Julison Canggih Persada Sembiring Depari Chandra I. Lumban Gaol Cionita, Tezara Diane Merani, Marice Endang Hartiningsih Fachry Abda El Rahman Ferdinand Putera Safanpo, Herman Fitriyana, Deni Fajar Florida Doloksaribu Fred Andris Waroy Griapon, Nourish Griapon, Nourish C. Gunawan Purba, Hisar Hartiningsi, Endang Haryati, Kristina Henny Rosita Mantundoij Herbert Innah Heri Purnomo Himawan Himawan HS, Surjono Husain Husain Husain Husain I Wayan Nurjaya Iriana Zebua, Lisye Ivan Medwin Januar Parlaungan Siregar Jembris Smur Jhonson Siallagan Jitmau, Yowel Johni J Numberi Johnson Siallagan JOHNSON SIALLAGAN Karapa, Enos Kende Suma, Ratte Kholil Kholil Kholil Kholil Khristhoper Aris Arianto Manalu Krisna Dewi, Krisna Kudiai, Silvester Vinsentsius Lazarus B. Ramandey, Lazarus B. Lefaan, Yosef Lekito, Hanro Lingga, Irene Maay, Gedrida Yacoba Maklon Warpur Marthen Liga Matulessy, Beni D. J. Mickael Ruben Kaiway Min Adii Mochamad Marte Ardhianto Mochammad Marte Ardianto Muhammad Syawal Mujiati Mujiati Mujiati Nugroho, Rizky Fajar Nurul Puspitasari Oktaviani, Theresia W. Pakpahan, Marianti Merry Pither Palamba Puspitasari, Windy Desti Putra, Naufal Bahy Rahmat Doni Widodo Rante, Harmonis Ranteallo, Obet Riando, Kopanye Riano M Rumbiak Risky Novan Ngutra Rombe Allo Ronaldo Ruwayari, Daniel Rumar, Kristofel Rusim, Dewi Ana Rusmanta, Yohanes B. J. Ruth Yabansabra, Yuliana Safanpo, Apolo Samsudin Anis Samuel Parlindungan Siregar Saramuke, Dina Mathilda Selyus Rantepulung Setiadji, Prihananto Siahainenia, Armand Ronald Silitonga, Astina Wati Siregar, Januar Parlaungan Suebu, Erni Fitri Suharyadi Suharyadi Suparno Surjono HS Syamsuddin, Indri Hapsari Tanta - Tezara Cionita Tiurlina Siregar Tonapa, Veronika Gina Uniplaita, Tiper Walukouw, Auldry F Wambrauw, Oscar O. Wanane, Wilfriedf Wanane, Yohanis Werdani, Anastasia Sri Yane Oktovina Ansanay Yembise, Leo Yansen