JIF Jurnal Ilmu Fisika最新文献

{"title":"Modeling of Dynamics Object with Non-Holonomic Constraints Based on Maple in Cylinder Coordinate R×S^1×SO(3)","authors":"M. Ariska, H. Akhsan, M. Muslim, J. Pebralia, A. R. Sinensis, T. Aprianti","doi":"10.25077/jif.14.1.28-36.2022","DOIUrl":"https://doi.org/10.25077/jif.14.1.28-36.2022","url":null,"abstract":"Reliable real-time planning for dynamic systems is crucial in today's rapidly growing automated ecosystem, such as the environment and methods of planning a robotic system. This paper describes the rigid dynamics system with non-holonomic constraints on the R×S^1×SO(3) configuration space. The method used is the motion planning network and numeric treatment using physics computation which can be used for non-holonomic object systems that move in real-time with Jellets Invarian (JI) approach. The JI approach can result in a motion system equation and evaluate the model of an object with non-holonomic constraints and also display experimental results for navigation in the R×S^1×SO(3)  configuration space. The motion system with non-holonomic constraints used is Tippe top (TT). TT is a toy like a top which when rotated will flip itself with its stem. The author have finished in simulating the dynamics of TT motions in real time with the initial states that have been described with various coordinate in the   configuration space. Based on the results of previous studies on similar objects, TT was solved by the Eular-Lagrange Equation, Routhian Reduction Equation and Poincare. The author succeeded in describing the dynamics of TT motion in real time with predetermined initial conditions with various coordinates in the  R^2×SO(3) configuration space.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43477992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Statistical Comparison of IMERG Precipitation Products with Optical Rain Gauge Observations over Kototabang, Indonesia","authors":"H. Yusnaini, Ravidho Ramadhan, M. Marzuki, Ayu Putri Ningsih, H. Hashiguchi, T. Shimomai, M. Vonnisa, Harmadi Harmadi, W. Suryanto, S. Sholihun","doi":"10.25077/jif.14.1.10-20.2022","DOIUrl":"https://doi.org/10.25077/jif.14.1.10-20.2022","url":null,"abstract":"Satellite-based precipitation estimates play a crucial role in many hydrological and numerical weather models, especially to overcome the scarcity of rain gauge data. Globally gridded rainfall product from Integrated Multi-Satellite Retrievals for Global Precipitation Measurement (GPM) (IMERG) has been used in a wide range of hydrological applications. However, the IMERG is inherently prone to errors and biases. This study evaluated the performance of the IMERG-Final run (IMERG-F) product to estimate rainfall in a mountainous area of Sumatra. Validation was carried out using optical rain gauge (ORG) data for 15 years (2002-2016), at Kototabang, West Sumatra, Indonesia. In general, IMERG-F overestimated rainfall in all time scales. The longer the time scale was, the better the performance of IMERG-F we obtained. This feature was indicated by all quantities of continuous and categorical statistical matrices used. The performance of IMERG-F was lower than in other areas of the Maritime Continent, except for the probability of detection (POD) value. IMERG-F could detect rain very well, including for daily and hourly data, but the false alarm rate (FAR) was also relatively high. Such high FAR value may indicate a significant small-scale spatial rainfall variability in mountainous area of Sumatra.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49395895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of Environmental Change in Bukit Kerang, Aceh Tamiang Regency Using Landsat Satellite Imagery","authors":"Sphinoza Lisnaria Simatupang, Rahmatsyah Rahmatsyah","doi":"10.25077/jif.14.1.1-9.2022","DOIUrl":"https://doi.org/10.25077/jif.14.1.1-9.2022","url":null,"abstract":"Changes in land cover and temperature in Bukit Kerang have been investigated using Landsat satellite images. We used Landsat 5 TM Landsat satellite imagery in 1988, Landsat 7 ETM in 2000, and Landsat 8 OLI in 2020. The ENVI 4.7 and ArcGIS 10.3 software was used to perform radiometric corrections, image cropping, image classification, image reclassification, calculating area, and layouts. Changes in land cover and land area in 1988, 2000, and 2020 affected the surface temperature conditions in those three years. In 1988, the dominant land area of forest cover was 5,926.44 ha (1 ha = 104 m2), with the dominant temperature distribution of 17.2° C. In 2000, there was an increase in settlements by 25.56 ha and rice field area, which caused an increase in the temperature distribution of 19.7 – 25.4° C. In 2020, forest type land cover changes into plantations, fields, and settlements decreased by 3,731.91 ha, increasing temperature distribution of 20.6 – 21.8° C. Thus, there is a strong relationship between changes in land cover and change in surface temperature in Bukit Kerang area.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48855064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmentally Friendly Emergency Lighting System Using Bio Batteries from Pineapple Skin Waste as Energy Source","authors":"Neneng Fitrya, Shabri Putra Wirman, Rahmat Dwi Rahayu","doi":"10.25077/jif.13.2.118-125.2021","DOIUrl":"https://doi.org/10.25077/jif.13.2.118-125.2021","url":null,"abstract":"This study examines the use of bio batteries from pineapple skin paste as an energy source. Bio-battery is a battery with a paste derived from natural materials that are environmentally friendly. The bio-battery is capable of generating electrical power by using a pineapple peel electrolyte paste and copper (Cu) and zinc (Zn) electrodes arranged in series. Parameters measured are voltage, current and duration of the LED (Light Emitting Diode) light. The pasta variations used were pure pasta, pasta with the addition of sodium bicarbonate, pasta with the addition of salt and pasta fermented using LEDs with the total of 6 pieces arranged in parallel and the implementation using pasta with the addition of 0.75 gr salt and 4 LEDs. The research results reveal that the pure paste produces a maximum voltage of 2.410 volts, a maximum current of 0.12 mA with a 14-hour LED light; paste added with sodium bicarbonate produces a maximum voltage of 2,342 volts, a maximum current of 0.21 mA with LED lights on for 12 hours; paste added with salt produces a maximum voltage of 2.432 volts, a maximum current of 0.33 mA with an LED lamp on for 13 hours; and the fermented pasta produced a maximum voltage of 2.542 volts, a maximum current of 0.91 mA. The results showed that bio-battery with pineapple skin paste can produce electrical power that can be used as an energy source for emergency lights.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43296826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Characterization of HPMpFBP Using Raman Spectroscopy, Nuclear Magnetic Resonance (NMR) Spectroscopy, and FTIR","authors":"Wilda Triputri Yusri, Y. Yulkifli, Alizar Alizar, Illyas Md Isa","doi":"10.25077/jif.13.2.109-117.2021","DOIUrl":"https://doi.org/10.25077/jif.13.2.109-117.2021","url":null,"abstract":"Synthesis is one of the models for the formation of a new drug or compound with the aim of obtaining better activity at an economical price. HPMpFBP has been synthesized by mixing of 1-phenyl-3-methyl-5-pyrazolone and 4-fluorobenzoyl chloride. In the synthesis of HPMpFBP, a new compound namely 1-phenyl-3-methyl-4-(4-fluorobenzoyl)-5-pyrozolone has been obtained. The sample then characterized by non-invasive methods using Raman spectroscopy, Nuclear Magnetic Resonance (NMR) Spectroscopy and FTIR. Through this characterization process, wavelength information, chemical shift, and functional groups (chemical structure) of HPMpFBP samples were obtained. HPMpFBP has a chemical structure of C17H13N2O2F, the highest wavelength carried out by characterization using Raman is 1643.91 cm-1, the highest chemical shift characterized by using NMR (Nuclear Magnetic Resonance) is 7.8628 ppm, and the functional groups identified by using FTIR are (O-H, C-H, C=C, C=O, C-N). Information from the HPMpFBP sample characterization process using mentioned characterization methods was compared with previously reported results.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44649934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interpretation of Subsurface Structure Based on the Magnetic Data at Semurup Geothermal Area Kerinci","authors":"Ikhwan Fikri Maulidan, Ratika Tri Suci, Andre Mahendra, A. Putra","doi":"10.25077/jif.13.2.101-108.2021","DOIUrl":"https://doi.org/10.25077/jif.13.2.101-108.2021","url":null,"abstract":"The interpretation of subsurface structures in Semurup geothermal area has been carried out using the geomagnetic method. Data were collected in an area of 1500 m × 1400 m consisting of 160 points. The magnetic anomaly value obtained was derived from the total magnetic induction value that has been corrected by IGRF and diurnal variation, then transformed by reduction to equator and upward continuation to remove noise and separate local and regional anomalies. The results of data processing showed the total magnetic field values in the study area ranged from -1730.4 nT to 1909.0 nT. Magnetic anomalies in this study area are dominated by negative values that may be caused by demagnetised rocks (a result of hydrothermal alteration). The results of 2D modeling, it has 5 rock layers that can be classified into 3 main parts of the geothermal system The first and second layers are caprock with a depth of up to 850 meters consisting of sedimentary rock, clay, and sandstone. The third layer is indicated as a reservoir with a depth from 850 to 1450 m and is dominated by sandstone and clay alteration Hot rock in the fourth and fifth layers is dominated by basalt igneous rock and the presence of dacitic lava intrusion from the northeast of the study area at depths below 1450 m, and the Siulak fault as a outflow zone for geothermal fluid. The presence of the caprock, reservoir, hot rock, and fault zones indicates that the Semurup area has geothermal potential and is suitable for further exploration.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43628531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studi Awal Indikasi Intrusi Air Laut Menggunakan Metode Gelostrik Tahanan Jenis","authors":"F. D. Sastrawan, R. Rahmania, M. Arisalwadi","doi":"10.20527/flux.v18i2.9077","DOIUrl":"https://doi.org/10.20527/flux.v18i2.9077","url":null,"abstract":"ABSTRAK − Eksploitasi air tanah yang berlebihan merupakan salah satu faktor pendorong terjadinya pencemaran air laut atau intrusi air laut. intrusi air laut merupakan salah satu pencemaran air tanah yang memiliki banyak dampak negatif. Intrusi air laut dapat menyebabkan krisis air bersih, mengubah kesuburan tanah dan dapat merusak pondasi bangunan. Penelitian ini bertujuan untuk mengetahui indikasi intrusi air laut di Kecamatan Manggar Kota Balikpapan dengan menggunakan metode geolistrik resistivitas. Metode geolistrik memanfaatkan sifat kelistrikan suatu material, yaitu resistivitas untuk menentukan kondisi bawah permukaan. Parameter resistivitas dapat digunakan untuk mengidentifikasi indikasi intrusi air laut. Nilai resistivitas lapisan tanah atau airtanah yang telah tercemar oleh air laut akan semakin berkurang. Hal ini terjadi karena kandungan elektrolit yang memudahkan arus listrik mengalir. Hasil penelitian menunjukkan adanya indikasi intrusi air laut yang ditandai dengan anomali resistivitas rendah sebesar 1 – 8 m. Intrusi air laut di daerah Manggar ditemukan pada jarak ± 200 m dari pantai. Lapisan tanah yang tercemar airtanah diduga merupakan lapisan lempung. KATA KUNCI: Anomali; Air tanah; Resistivitas; Intrusi Air Laut ABSTRACT − Excessive groundwater exploitation is one of the driving factors for sea water pollution or seawater intrusion. seawater intrusion is one of the groundwater contaminations that has many negative impacts. Seawater intrusion can cause a clean water crisis, change soil fertility and can damage building foundations. This study aims to determine the indication of seawater intrusion in the Manggar sub-district of Balikpapan City using the resistivity geoelectric method. The geoelectric method makes use of the electrical properties of a material, namely resistivity to determine subsurface conditions. The resistivity parameter can be used to identify indications of sea water intrusion. The resistivity value of soil layers or groundwater that has been contaminated by sea water will decrease. This happens because of the electrolyte content which makes it easier for electric current to flow. The results showed an indication of seawater intrusion marked by a low resistivity anomaly of 1 - 8 Ωm. Sea water intrusion in the Manggar area was found at a distance of ± 200 m from the coast. Soil layer that is contaminated with groundwater is thought to be a layer of clay. KEYWORD S: Anomaly; Groundwater; Resistivity; Seawater intrusion","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78704775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KAJIAN SIFAT KEMAGNETAN PADA FREE LAYER NiFe DAN CoFeB BERDASARKAN SIMULASI MIKROMAGNETIK","authors":"Ani Indriawati, Galih Setyawan, Edi Suharyadi","doi":"10.20527/flux.v18i2.10459","DOIUrl":"https://doi.org/10.20527/flux.v18i2.10459","url":null,"abstract":"Telah dilakukan simulasi mikromagnetik free layer NiFe dan CoFeB, dengan ukuran free layer 500 nm×200 nm×5 nm. Free layer NiFe dan CoFeB dapat diaplikasikan pada Magnetic Tunnel Junction . Pemberian medan magnet luar sebesar 0 mT sampai dengan 20 mT mengakibatkan terjadinya pergeseran domain wall magnetik.berdasarkan hasil simulasi mikromagnetik,pada kurva hubungan antara medan magnet luar dan nilai magnetisasi,  terlihat perbedaan trend yang signifikan pada pemberian medan magnet luar di atas 11 mT Pada medan magnet 20 mT, momen magnetik CoFeB belum terlalu menunjukkan terjadinya saturasi, sedangkan pada NiFe mulai menunjukkan trend menuju saturasi. Besarnya energy anisotropi bernilai maksimum pada saat free layer NiFe dan CoFeB diberikan medan magnet luar sekitar 0,7 mT, dan bernilai minimum saat medan magnet luar sebesar 20 mT. KATA KUNCI: NiFe, CoFeB, Spintronik, Magnetisasi, Energi Anisotropi","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81146649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sintesis Arang Batok Kelapa menjadi Material Maju Grafen Menggunakan Metode Reduksi Kimia","authors":"Sugianto Arjo, Harry Ramza, Mirzanur Hidayat","doi":"10.20527/flux.v18i2.10549","DOIUrl":"https://doi.org/10.20527/flux.v18i2.10549","url":null,"abstract":"ABSTRAK- Penelitian ini merupakan bentuk kajian sederhana yang memanfaatkan biomassa pertanian yaitu batok kelapa yang disintesis menjadi material maju grafen. Grafen merupakan salah satu material maju dan terbarukan dalam bidang sains dan teknologi terkini karena kemanfaatannya yang multifungsi. Penelitian ini diawali dengan mengubah biomassa batok kelapa menjadi karbon melalui suatu reaksi pembakaran. Arang hasil dari pembakaran selanjutnya diberikan perlakuan dengan metode reduksi kimia atau metode Hummer tereduksi. Hasil penelitian ini memperlihatkan bentuk morfologi grafen berupa serpihan-serpihan atau dikenal dengan istilah  grafen Flakes . Hasil ini terkonfirmasi melalui uji visualisasi SEM, dimana grafen Flakes diperlihatkan dalam formasi tumpukan mengindikasikan struktur multilayer. Hasil uji TEM memperlihatkan jarak antar kisi kristal yang dimilikinya yaitu berkisar pada 2,40 dan 2,46 A.  Berdasarkan pada data jarak antar kisi kristal tersebut, hasil simulasi energi menggunakan prinsip DOS didapatkan bahwan grafen hasil sintesis memiliki energi secara berturut-turut adalah 4,0 eV untuk level konduksi dan 3,3 eV untuk level valensi. Hasil uji optik sifat absorbansi dan fluoresens memperlihatkan grafen memiliki dua puncak serapan utama yang berkorelasi dengan terjadinya transisi energi  dan  dari bentuk ikatan C=C dan C-O-C. Adapun pendaran yang dihasilkan melalui uji fluoresensi adalah warna hijau dengan panjang gelombang 525 nm.  Secara sederhana rancangan penelitian dapat dikatakan telah berhasil dalam mensintesis grafen dari arang batok kelapa, meskipun belum sempurna dan masih perlu untuk dilakukan kajian kembali. Hasil dari penelitian ini selanjutnya akan dikembangkan lagi menjadi bentuk grafen dengan morfologi yang berpori.  ABSTRACT − This research is a simple study that takes an advantage of agricultural biomass that is synthesized cocconut shell to become graphene, an advanced material. Graphene is one of advanced-and-renewable material in the recent science and technology due to its multifunctional values.The research started with a changed cocconut shell being carbon through a burning reaction. Then the next procedure is given to the charcoal, produced from the burning process, by chemical reduction method or reduced hummer method.The observation showed a morphological form of graphen known as graphen flakes.  It had been confirmed by SEM visualization test where the graphene flakes exhibited in a drift formafion indicated a multilayer structure. TEM test result showed a space in the owned crystal lattice approximately from 2.4 to 2.46 A. Based on the data of the crystal lattice space, the result of energy simulation using DOS principal impressed that synthesized graphen has energy respectively 4.0 eV for a conduction and 3.3 eV for valency level. Therefore, the absorbantion and fluorecence result of the optical test showed that the graphen has two main absorptions corellated with the transitional energy of and to the form of ","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":"471 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84590102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifikasi Pencemaran Logam Berat di Sekitar Pelabuhan Lembar Menggunakan Analisa Parameter Fisika dan Kimia","authors":"N. Nurhidayati, Lalu A. Didik, Ahmad Zohdi","doi":"10.20527/flux.v18i2.9873","DOIUrl":"https://doi.org/10.20527/flux.v18i2.9873","url":null,"abstract":"ABSTRAK- Pelabuhan Lembar merupakan pelabuhan penyeberangan yang ada di pulau Lombok yang keberadannya sangat mempengaruhi kehidupan masyarakat khususnya dampak air yang ditimbulkan oleh aktivitas keluar masuknya kapal- kapal. Penelitian ini bertujuan untuk mengidentifikasi pencemaran logam berat yang ada disekitar Pelabuhan Lembar menggunakan analisa parameter fisika- kimia. Metode storet adalah metode yang digunakan untuk mengidentifikasi kualitas air yang parameter ujinya terdiri dari parameter fisika meliputi TDS, Konduktivitas Listrik, pH, serta suhu dan parameter kimia yang meliputi konsentrasi besi (Fe), kadmium (Cd), timbal (Pb), dan tembaga (Cu). Hasil uji tersebut menyatakan bahwa sebagian besar perairan di pelabuhan Lembar tidak terkontaminasi oleh logam berat. Hal ini dibuktikan dengan hasil pengukuran rata- rata untuk Fe sebesar 0,048 ppm, Cu tertinggi sebesar 0,0137 ppm, Pb tertinggi sebesar 0,0364 ppm, dan Cd tertinggi sebesar 0,0107 ppm. ABSTRACT- Lembar port is a ferry port on the island of Lombok. This port connects Lombok Island and Bali Island. The existence of the Lembar Port is very influential on people's lives, especially the I  mpact of water caused by loading and unloading activities, remaining fuel from cargo ships, as well as pestilence from residents around the port waters. This study aims to identify heavy metal contamination around Lembar port using physico-chemical parameter analysis. The experiment method used to identify water quality whose test parameters consist of physical parameters including TDS, Electrical Conductivity, pH, and temperature and chemical parameters including concentrations of iron (Fe), cadmium (Cd), lead (Pb), and copper (Cu). The test results stated that most of the waters in the Lembar port were not contaminated by heavy metals. This is evidenced by the average measurement results for Fe of 0.048 ppm, the highest Cu at 0.0137 ppm, the highest Pb at 0.0364 ppm, and the highest Cd at 0.0107 ppm.","PeriodicalId":52720,"journal":{"name":"JIF Jurnal Ilmu Fisika","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79316380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}