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All Journal JURNAL ILMIAH PLATAX Jurnal Neutrino : jurnal fisika dan aplikasinya Journal of Geoscience, Engineering, Environment, and Technology Journal of Applied Geospatial Information Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Jurnal Pendidikan Fisika dan Teknologi Jurnal Ilmiah Samudra Akuatika Jurnal Lemuru : Jurnal Ilmu Perikanan dan Kelautan Indonesia Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Bubungan Tinggi: Jurnal Pengabdian Masyarakat BERNAS: Jurnal Pengabdian Kepada Masyarakat Bioscientist : Jurnal Ilmiah Biologi Jurnal Pengabdian Masyarakat Bhinneka Abdi Jurnal Publikasi Social Engagement: Jurnal Pengabdian Kepada Masyarakat
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Universitas HKBP Nommensen Pematang Siantar
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The Impact Of Total Suspended Solid (TSS) And Containing Water Chlorophyll-A On The Fertility Level Of Jakarta Jakarta Bay Waters Using Technology Of Google Earth Engine (Gee) Clouds Sinaga, Mardame Pangihutan; Siburian, Daniel Tony Edyt; Zega, Edward Kristian
Jurnal Ilmiah Platax Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i2.55981

Abstract

Research on the distribution of TSS and containing water chlorophyll-a using GEE Cloud Technology in Jakarta Bay Waters was conducted from April to August 2021. Analysis was carried out using the MODIS AQUA-L3SMI satellite and Sentinel 2 TOA reflectance data. The TSS results show that it is distributed evenly (homogenously), varies, and fluctuates from the coast of Jakarta to the Waters of Jakarta Bay, namely 0-120 mg/l, while the containing water chlorophyll-a is distributed unevenly or varies, namely from April 2021 with value 0-3 mg/m3, chlorophyll-a in May 2021 almost evenly distributed with a value of 0-2 mg/m3, chlorophyll-a in June 2021 spread unevenly and fluctuating with an amount of 1-3  mg/m3, for chlorophyll-a in July 2021 was absent due to the influence of many and thick clouds. Chlorophyll-a in August 2021 spread almost evenly and varied throughout the waters amounting to 0,28 mg/m3. TSS spreads evenly (homogeneously), varies, and fluctuates around the edge of Jakarta's coastal waters down to the waters of Jakarta Bay and is not suitable for demersal fish species except zooxanthellae coral reef species. Meanwhile, the containing water chlorophyll-a is spread evenly, varies, and fluctuates. The large amount of chlorophyll-a in all waters and the high TSS will cause total death of living creatures in the waters. Image data can be used to map TSS distribution patterns and contain water chlorophyll-a in the waters of Jakarta Bay. Keywords: TSS; Containing Water Chlorophyll-a; MODIS AQUA-L3SMI Satellite; Sentinel 2 TOA reflectance data Satellite; Jakarta Bay Waters. Abstrak Penelitian sebaran TSS dan kandungan klorofil-a menggunakan Teknologi GEE Cloud di Perairan Teluk Jakarta telah dilaksanakan dari bulan April sampai dengan Agustus 2021. Analisis dilakukan dengan menggunakan satelit MODIS AQUA-L3SMI dan Sentinel 2 TOA reflectance data. Hasil TSS diperoleh bahwa menyebar merata (homogen), bervariasi, dan berfluktuasi dari pinggir pantai Jakarta sampai ke arah perairan Teluk Jakarta, yaitu 0-120 mg/l, sedangkan kandungan klorofil-a menyebar tidak merata atau bervariasi, yaitu dari bulan April 2021 dengan nilai 0-3 mg/m3, klorofil-a di bulan Mei 2021 hampir menyebar merata yang nilai 0-2 mg/m3, klorofil-a di bulan Juni 2021 menyebar tidak merata dan berfluktuasi dengan jumlah 1-3 mg/m3, untuk klorofil-a di bulan Juli 2021 tidak ada karena pengaruh awan yang banyak dan tebal, dan klorofil- a di bulan Agustus 2021 menyebar hampir merata dan bervariasi ke seluruh perairan berjumlah 0-2,8 mg/m3. TSS menyebar secara merata (homogen), bervariasi dan fluktuasi di sekitar pinggiran perairan pantai Jakarta sampai ke perairan Teluk Jakarta dan tidak cocok untuk jenis-jenis ikan demersal kecuali jenis terumbu karang zooxanthellae. Sedangkan kandungan klorofil-a nya menyebar secara merata, bervariasi dan fluktuasi. Banyaknya kandungan klorofil-a yang ada di semua perairan dan TSS nya tinggi, akan menyebabkan kematian secara total terhadap makhluk hidup di dalam perairan. Data citra dapat digunakan untuk memetakan pola sebaran TSS dan kandungan klorofil-a di wilayah perairan Teluk Jakarta. Kata kunci: TSS; Kandungan Klorofil-a; Satelit MODIS AQUA-L3SMI; Satelit Sentinel 2 TOA reflectance data; Perairan Teluk Jakarta
VISUALIZATIONS AND ANALYSES OF QUANTUM BEHAVIOR, SPACETIME CURVATURE, AND METRIC RELATIONSHIPS IN RELATIVISTIC PHYSICS Sinaga, Mardame Pangihutan; Pandara, Dolfie Paulus; Nyuswantoro, Ukta Indra; Nasution, Budiman; Siagian, Ruben Cornelius
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2023): October
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v16i1.20641

Abstract

This study aims to investigate essential concepts in quantum mechanics and theoretical physics, with an emphasis on the 1+1 dimension. We examine the Dirac equation for relativistic spin-1/2 particles, the Time-Dependent Schrödinger Equation in 1+1 spacetime with flat conformal metric, and connect them to the Dirac equation. Additionally, we explore the Alcubierre Metric related to warp drive, particle modeling in a harmonic potential using the Schrödinger Equation, and the Gödel Metric Solution to depict the peculiarities of spacetime. The research aims to deepen the understanding of these concepts, identify theoretical implications, and their potential applications. This research aims to enhance the understanding of fundamental physics, assist in the development of future technologies, and provide deeper insights into the universe. Its benefits lie in contributing to theoretical understanding in physics, which can spark the development of new theories. This study is limited to physics concepts in the 1+1 dimensions, without empirical experiments or practical applications. The primary focus is on the theoretical analysis of these concepts. The results of this research have potential theoretical implications in understanding basic physics and spacetime phenomena. The simplification and connections between these concepts can aid in the development of new theories in theoretical physics. The uniqueness of this research lies in its integrative approach to quantum mechanics and theoretical physics concepts in the 1+1 dimension, which may not have been extensively explored previously. Through this research, we have investigated several key concepts in quantum mechanics and theoretical physics in the 1+1 dimension. These findings can make a significant contribution to our understanding of the universe and the potential development of new theories in physics.
Analysis Of River Ordo In The Tukad Balian Watershed (DAS), Bali Province, Indonesia Sinaga, Mardame Pangihutan; Simanullang, Ady Frenly; Siburian, Daniel Tony Edyt; Joko Barita Sianipar; Sianipar, Herna Febrianty; Sianturi, Tambos August
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 04 (2024): JGEET Vol 09 No 04 : December (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.04.18927

Abstract

River order research in Tukad Balian Watershed, Bali Province uses ArcGIS Pro to process ASTER GDEM and National DEM data. The analysis is based on: the area and Perimeter of the Watershed, Watershed Length and Width, Land Slope, Average Height, Order and Level of River Branching. The results obtained for the Watershed show that the morphometric value is an area of 15485,20 hectares, a length of 23,08 km, a land slope of 0,40%, and 5 orders of branching rivers with a total of 665 river sections. The shape of Watershed Tukad Balian roundness index value is 7,2. GIS is an effective system for reducing Watershed morphometric information. The research method used is to directly calculate the morphometric parameters of the Tukad Balian Watershed, Bali Province, namely: Area and Perimeter of the Watershed; Watershed Length and weight; River slop or gradient; Average Height; Order and Level of River Branching; Flow Density; and Watershed Form. The conclusion obtained is: The Tukad Balian watershed is a standard-sized watershed with an area of 15.485,20 Ha an average height of 200 meters above sea level and the main river channel is 10,71 Km long. There a plot sections with a total length of 23,08 Km; The elongated shape of the Tukad Balian watershed is in the medium category, where the Tukad Balian Watershed will not experience major flooding.
Sosialisasi Penggunaan Mesin Bubut Tipe Konvensional pada Siswa SMK Pelayaran Samudera Indonesia Medan Purba, Jhon Sufriadi; Sianturi, Tambos August; Sinaga, Mardame Pangihutan
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2025)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v6i1.10253

Abstract

Mesin bubut adalah salah satu jenis mesin perkakas yang digunakan untuk membentuk benda kerja dengan cara memutar benda kerja pada sumbu tertentu, sementara alat potong bergerak untuk menghilangkan material. Proses ini disebut dengan proses pembubutan, yang bertujuan menghasilkan benda kerja berbentuk silinder, tirus, ulir, atau bentuk lainnya. Sosialisasi penggunaan mesin bubut di Sekolah Menengah Kejuruan (SMK) bertujuan untuk meningkatkan pemahaman dan keterampilan siswa dalam mengoperasikan mesin perkakas ini secara efektif dan aman. Mesin bubut merupakan alat penting dalam dunia industri, sehingga penguasaan teknologi ini menjadi salah satu kompetensi utama yang harus dimiliki siswa jurusan teknik pelayaran. Kegiatan sosialisasi meliputi penjelasan teori dasar mesin bubut, demonstrasi praktik pengoperasian, serta penerapan prosedur keselamatan kerja. Metode yang digunakan melibatkan sesi pelatihan interaktif, diskusi, dan praktik langsung di bengkel kerja. Hasil sosialisasi menunjukkan peningkatan kemampuan siswa dalam memahami fungsi komponen mesin, proses pembubutan, serta kemampuan menghasilkan produk dengan presisi tinggi sesuai spesifikasi. Program ini diharapkan mampu meningkatkan kesiapan siswa dalam menghadapi dunia kerja dan mendukung pengembangan kompetensi kejuruan di SMK.
The Potential Bioactive Compound of Rhizophora Apiculata Mangrove Fruit Extract in Inhibiting the Growth of Salmonella typhi Bacteria Sianipar, Herna Febrianty; Sinaga, Mardame Pangihutan; Barat, Welmar Olfan Basten
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.12344

Abstract

Infections caused by Salmonella typhi remain a serious global health problem, particularly due to the increasing bacterial resistance to conventional antibiotics. Therefore, the search for effective natural antibacterial sources is urgently needed. Rhizophora apiculata, a mangrove plant known to contain various bioactive compounds, has the potential to be an alternative antibacterial source. This study aims to identify the phytochemical content in R. apiculata fruit extract and evaluate its antibacterial activity against S. typhi using the disc diffusion method and bacterial cell morphology analysis via SEM. The phytochemical screening results revealed that the extract contains phenolics, tannins, alkaloids, and flavonoids. However, saponins and steroids were not detected. The antibacterial activity test showed that the extract at a concentration of 250 mg/mL significantly (p < 0.05) inhibited the growth of S. typhi, with the largest inhibition zone (11.6 mm). SEM observations supported this finding by showing a decrease in the number of bacterial cells at extract concentrations of 125 mg/mL and 250 mg/mL, where the highest concentration caused the most bacterial cell death. This study demonstrates the potential of R. apiculata fruit extract as an effective natural antibacterial source for the development of alternative treatments for S. typhi infections
PENGOLAHAN LIMBAH CAIR INDUSTRI RUMAH TANGGA DENGAN ADSORPSI DAN PRETREATMENT NETRALISASI DAN KOAGULASI DI SUNGAI PEMATANG SIANTAR Sinaga, Mardame Pangihutan; Simanullang, Ady Frenly
JURNAL LEMURU Vol 4 No 3 (2022): JURNAL LEMURU: Jurnal Ilmu Perikanan dan Kelautan Indonesia
Publisher : Program Studi Teknologi Hasil Perikanan|Fakultas Pertanian|Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/lemuru.v4i3.2273

Abstract

The household industrial liquid waste does not meet the quality standards of the Minister of Environment Regulation Number 5 0f 2014, so it needs to be processed so that it does not pollute the environment. This study aims to examine the effect of the dose of Poly Alum Chloride (PAC) coagulant on the reduction of Pb, Cr, and TDS, examine the quality of wastewater after being neutralized, coagulated, and adsorbed, especially for parameters Pb, Cr, TDS, and pH. The variables in this study were PAC doses, namely 150 mg/l, 200 mg/l, and 250 mg/l. the research was conducted on a laboratory scale with a continuous system with a downflow. The adsorption media used were palm fiber, coconut fiber, bagasse-activated carbon, and zeolite which were arranged in stages in a PVC pipe reactor. The entry of Pb, Cr, and TDS into the human body can be through foods from plants that are commonly consumed by humans such as rice, tea, and vegetables. Pb metal enters the waters through the crystallization of Pb, Cr, and TDS in the air with the help of rain. In addition, the certification process of mineral rocks is also one of the entry routes for Pb, Cr, and TDS sources into the waters. Researchers are interested in researching the processing of household industrial wastewater so that it can be used by the surrounding residents.
Coulomb Stress Changes in the 2004 Aceh Earthquake on the Mount Sibualbuali and Mount Lubukraya Sinaga, Goldberd Harmuda Duva; Halawa, Analiser; Prasetyo, Retno Agung; Silaban, Irving Josafat Alexander; Sinaga, Mardame Pangihutan
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 10 No 2 (2024): July - December
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v10i2.7110

Abstract

The great Aceh earthquake on December 26, 2004, had a magnitude of 9.2 Mw for 10 minutes with coordinates 3,316°N 95,854°E. had a tremendous impact on changes in geological conditions and disasters in Aceh and Asia, especially Southeast Asia and South Asia. Changes in geological conditions have resulted in Aceh and its surroundings becoming more prone to earthquakes, including volcanoes in North Sumatra. This research aims to determine the value of changes in coulomb stress that occur on Mount Sibualbuali and Lubukraya. This research uses the coulomb stress method presented in Coulomb 3.4 software. This research produces positive coulomb stress changes in 2021 which are marked by the red lobe, namely 0.197 bar on Mount Sibualbuali and 0.187 bar on Lubukraya. The highest increase in chwerees in coulomb stress was in 2015, namely 0.319 bar in Sibualbuali and 0.262 bar in Lubukraya. This research also resulted in the highest coulomb stress changes at a depth of 90-100 km so that it does not affect the volcanic activity of the two mountains.
Sosialisasi Pentingnya Fasilitas Sarana Air Bersih Di Desa Mbinanga Kecamatan Pegagan Hilir Kabupaten Dairi Handoco, Ewin; Barat, Welmar Olfan Basten; Naibaho, Winfrontstein; Sinaga, Mardame Pangihutan; Samuel, Reaful
Jurnal Pengabdian Masyarakat Bhinneka Vol. 1 No. 3 (2023): Bulan Februari
Publisher : Bhinneka Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58266/jpmb.v1i3.52

Abstract

Sosialisasi Pentingnya Air Bersih, dimana air bersih merupakan salah satu kebutuhan masyarakat yang menunjang kehidupan suatu komunitas. penyediaan air bersih berkaitan erat dengan status kebersihan dan kesehatan setiap individu dalam masyarakat. Kegiatan sosialisasi ini ditujukan pada masyarakat Desa Mbinanga untuk memberikan edukasi tentang pentingnya penggunaan air yang bersih dalam kehidupan sehari-hari. Maksud dari kegiatan ini adalah untuk memberikan pengetahuan pada masyarakat setempat tentang pentingnya penggunaan air bersih dalam kegaitan sehari-hari. Metode yang digunakan dalam kegiatan ini adalah sosialisasi.Masyarakat Desa Mbinanga sangat membutuhkan sentuhan nyata untuk dapat menerima manfaat secara langsung dari adanya sarana air bersih di lokasi mereka bertempat tinggal. Selama ini masyarakat harus berjalan jauh dari atas bukit ke lembah atau desa tetangga mereka yang berjarak sekitar 1-1,5 Kilometer dari desa mereka. Sehingga hal ini sangat memberatkan dan tidak efektif serta efisien baik dalam waktu, tenaga dan biaya. Sosialisasi Sehingga dengan adanya sosialisasi ini diharapkan ada tindakan secara langsung kepada masyarakat. Pengabdian ini dapat meningkatkan pengetahuan masyarakat tentang pentingnya air bersih. Masyarakat mampu menyediakan air bersihnya dengan bergotong royong dan bekerjasama dengan pihak luar sebagai penyokong dana untuk keperluan material pembangunan. Perlunya kerjasama lintas sektoral baik masyarakat, swasta, keagamaan dengan pemerintah agar terjadi sinergi yang positif secara terintegrasi sehingga manfaatnya lebih luas ke seluruh desa. Mengingat air bersih merupakan hak dan kebutuhan seluruh warga desa.
The Impact of Sea Surface Temperature and Containing Chlorophyll-A on The Results of Skipjack Tuna (Katsuwonus Pelamis) Catch in The Indian Ocean Waters Sinaga, Mardame Pangihutan; Siburian, Daniel Tony Edyt
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 02 (2025): JGEET Vol 10 No 02 : June (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.02.21643

Abstract

Oceanographic factors can be an indicator in determining the potential of fishing grounds. The sampling technique of sea surface temperature (SST) and chlorophyll-a data in this study was carried out spatially and temporal using satellite image data which can be downloaded from Aqua MODIS. This study aimed to determine variations in SST distribution and chlorophyll-a concentration in Indian Ocean waters using Aqua MODIS imagery from June 2023 to May 2024; analyzing the relationship between the distribution of SST and chlorophyll-a with the number of pelagic fish catches in the Indian Ocean waters. The type of fish used as research material is skipjack tuna (Katsuwonus pelamis). The distribution of SST in the Indian Ocean waters for June 2023-May 2024 is between 29,15-31,64 °C, where there is a significant decrease in temperature from 31,10-29,15 °C due to the east monsoon wind and the chlorophyll-a distribution is around between 0,24-0,73 mg/m³ with the highest average distribution in the western season. This phenomenon causes chlorophyll-a to increase in the western season because the frequency of rainfall in this season is sufficient, causing nutrients to increase due to vertical stirring, which can increase chlorophyll-a at the sea surface. There is no relationship between SST and chlorophyll in the number of skipjack tuna catches in transition II with a strong correlation value and a significance value (F) of 1,o, meaning that SST and chlorophyll-a on skipjack tuna to the skipjack tuna catches not influence for each season, the influence of significant event is thought to be a lag in the food chain and high rainfall. This study reveals that while variations in sea surface temperature and chlorophyll-a concentration are significant understanding oceanographic conditions, they do not directly influence skipjack tuna catch rates, suggesting that other ecological factors, such as food chain dynamics and seasonal rainfall patterns, may play a more critical role.
Hubungan Panjang Berat Ikan Biji Nangka (Upeneus Moluccensis) di Pelabuhan Perikanan Samudera Belawan Damanik, Cristhyn Agustina; Sinaga, Mardame Pangihutan
Jurnal Ilmiah Samudra Akuatika Vol 9 No 2 (2025): Jurnal Ilmiah Samudra Akuatika
Publisher : Fakultas Pertanian Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/jisa.v9i2.13362

Abstract

This study was conducted with the aim of measuring the length and weight of the Jackfruit Seed Fish (Upeneus moluccensis). The number of fish samples used was 111 fish. With the overall length of the fish samples ranging from 105 mm to 165 mm, where the dominant total length of the fish caught was in the average range of 130.31 mm. Meanwhile, the weight of the Jackfruit Seed Fish (Upeneus moluccensis) ranged from 18 to 66 grams, with an average fish weight of 35.76 grams. The results of the calculation of the b value obtained for the Jackfruit Seed Fish (Upeneus moluccensis) at the Belawan Ocean Fishery Port were 2.86. Based on the b value obtained, it can be stated that the length of the fish weight is <3, (negative allometric) which means that the growth in length is faster than the growth in weight.
Co-Authors Ady Frenly Simanullang Agoez Loeqman Andry Agasi Hasiholan Purba Anjona Sirait Apriani Sijabat Barat, Welmar Olfen Basten Budiman Nasution Damanik, Cristhyn Agustina Frans Willis Siregar Goldbert Harmuda Duva Sinaga halawa, analiser Handoco, Ewin Herna Febrianty Sianipar Herna Febrianty Sianipar Herna Febrianty Sianipar Herna Febrianty Sianipar Herna Febrianty Sianipar Irving Josafat Alexander Joko Barita Sianipar Jono Barita Sianipar Jono Barita Sianipar Manik, Riau Wanshi Maryanto Saragih Mila Susanty Sianipar Naibaho, Winfrontstein Nainggolan, Dosy Maria Royeni Nyuswantoro, Ukta Indra Pandara, Dolfie Paulus Prasetyo, Retno Agung Purba, Jhon Sufriadi Ricky Tommy Fransiskus Purba Ruben Cornelius Siagian Samuel, Reaful Sanjay Marh Ompusunggu Saragih, Maryanto Siagian, Ruben Cornelius SIANTURI, TAMBOS AUGUST Siburian, Daniel Tony E. Siburian, Daniel Tony Edyt Simanullang, Ady Frenly Sinaga, Christa Voni Roulina Sirait, Anjona Siti Imroatul Maslikah Welmar Olfan Barat, Welmar Olfan Winfrostein Naibaho Zega, Edward Kristian