Jurnal Fisika Unand最新文献_第8页

Numerical Simulation of Bird Strike with Varied L/D Ratio in Hemispherical-ended Cylinder Bird Model Using Coupled Eulerian Lagrangian Method 用耦合欧拉-拉格朗日方法模拟半球端圆柱形鸟模型中不同L/D比的鸟击

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.628-638.2023

Endah Yuniarti, S Afandi Sitompul, B Aji Warsiyanto

引用次数: 0

Identifikasi Pola Redistribusi Tanah Untuk Pendugaan Erosi Berdasarkan Nilai Suseptibilitas Magnetik di Daerah Bukit Nobita Kota Padang 识别土壤重新分配模式，以诺比镇巴东地区的磁可伸缩价值为前提

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.639-645.2023

Ahmad Fadillah, Arif Budiman

{"title":"Identifikasi Pola Redistribusi Tanah Untuk Pendugaan Erosi Berdasarkan Nilai Suseptibilitas Magnetik di Daerah Bukit Nobita Kota Padang","authors":"Ahmad Fadillah, Arif Budiman","doi":"10.25077/jfu.12.4.639-645.2023","DOIUrl":"https://doi.org/10.25077/jfu.12.4.639-645.2023","url":null,"abstract":"Research has been carried out to identify soil redistribution patterns of soil redistribution as an estimate of erosion by analyzing the magnetic susceptibility values of soil samples in the Bukit Nobita area, Padang City. Soil samples were taken from two different areas, namely areas that are not vegetated and areas that are vegetated. The length of the track to each area is 100 m consisting of 10 points with variations in depth at each point, namely 10, 20, 30, 40, and 50 cm. The magnetic susceptibility measurement of the sample uses a Magnetic Susceptibility Meter with the commonly used frequencies, namely Low Frequency (LF) and High Frequency (HF). The measurement results show that for non-vegetated areas, the χ lf values range from 44 10 -8 m 3 kg -1 to 301 10 -8 m 3 kg -1 , and the χ hf value ranges from 43 10 -8 m 3 kg -1 to 298.9 10 -8 m 3 kg -1 . Whereas for samples from vegetated areas, the χ lf values range from 63.6 10 -8 m 3 kg -1 to 859.4 10 -8 m 3 kg -1 , and the χhf ranges from 63.1 10 -8 m 3 kg -1 to 852,5 10 -8 m 3 kg -1 . The results showed that the susceptibility value depends on the frequency (χ fd ) , which is <2% and was dominated by large magnetic minerals that were disturbed , such as erosion . The distribution profile of χ lf values tends to increase with increasing sampling depth , indicating that the soil in both tracks is disturbed, and the redistribution pattern of soil in non-vegetated areas is more evenly distributed than vegetated areas, allowing erosion to also occur in vegetated areas.","PeriodicalId":497807,"journal":{"name":"Jurnal Fisika Unand","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135148952","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}

引用次数: 0

Evaluasi Dosis Efektif Boron Neutron Capture Therapy (BNCT) Glioblastoma Multiforme Menggunakan Simulasi Monte Carlo 利用蒙特卡罗模拟评估硼中子俘获疗法（BNCT）治疗多形性胶质母细胞瘤的有效剂量

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.683-689.2023

Liska Tri Handayani, Wahyu Setia Budi, Fajar Arianto

{"title":"Evaluasi Dosis Efektif Boron Neutron Capture Therapy (BNCT) Glioblastoma Multiforme Menggunakan Simulasi Monte Carlo","authors":"Liska Tri Handayani, Wahyu Setia Budi, Fajar Arianto","doi":"10.25077/jfu.12.4.683-689.2023","DOIUrl":"https://doi.org/10.25077/jfu.12.4.683-689.2023","url":null,"abstract":"Glioblastoma multiforme merupakan kanker otak stadium IV yang sangat sulit diobati dan umumnya terjadi pada hemisfer serebrum otak. Terapi BNCT telah dikembangkan untuk pengobatan glioblastoma yang lebih aman, namun hamburan neutron dan foton gamma yang berasal dari terapi pada organ at risk ini perlu dievaluasi menggunakan simulasi. Metode yang dilakukan dengan mensimulasikan phantom ORNL-MIRD bagian kepala dan leher menggunakan program MCNPX. Arah penyinaran radiasi terhadap pasien dibuat menjadi dua arah yaitu RLAT dan TOP. Perhitungan dosis dalam BNCT dilakukan dengan mencari nilai dosis serap, dosis ekuivalen, dan dosis efektif. Dosis efektif dianalisis menggunakan ICRP publikasi 60 dan 103. Berdasarkan perhitungan dosis serap, arah penyinaran yang paling efektif adalah arah penyinaran TOP, dengan persentase dosis serap pada organ at risk relatif aman terutama pada organ tiroid, dan nilai pada organ cranium , otak, tiroid, dan kulit berturut-turut sebesar 11,4%, 10,15%, 0,002%, dan 6,4%. Nilai dosis efektif pada ICRP 60 dan 103 bernilai sama pada organ cranium dan kulit. Namun, pada organ tiroid, nilai dosis efektif dengan ICRP 103 lebih rendah dibandingkan ICRP 60. Hal ini menandakan berkurangnya resiko untuk penyakit terwaris pada tiroid, dan pada organ otak hanya dihitung menggunakan ICRP 103","PeriodicalId":497807,"journal":{"name":"Jurnal Fisika Unand","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135148945","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}

引用次数: 0

Design of a Thermal Conductivity Measurement Technique for Clay Furnace Materials Using an Arduino-Based Thermocouple Sensor¬ 基于arduino热电偶传感器的粘土炉材料导热系数测量技术设计

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.615-620.2023

Elfiana Elfiana, Salmawaty Tansa, Dewa Gede Eka Setiawan

{"title":"Design of a Thermal Conductivity Measurement Technique for Clay Furnace Materials Using an Arduino-Based Thermocouple Sensor¬","authors":"Elfiana Elfiana, Salmawaty Tansa, Dewa Gede Eka Setiawan","doi":"10.25077/jfu.12.4.615-620.2023","DOIUrl":"https://doi.org/10.25077/jfu.12.4.615-620.2023","url":null,"abstract":"This study aims to design a thermal conductivity measurement system for solid clay furnace materials, measure the thermal conductivity value of a clay furnace using an Arduino-based Thermocouple sensor, and determine the relationship of the thermal conductivity value to variations in clay furnace samples using an Arduino-based thermocouple sensor. The method used in research, design, manufacture and testing of tools. Data collection in this study was to measure the thermal conductivity of 4 samples of clay furnaces based on differences in husks using an Arduino-based Thermocouple sensor. Analysis of research data was carried out using descriptive statistics and inferential statistics, assisted by Microsoft Excel and SPSS programs. In data analysis, univariate, bivariate analysis was performed. The relationship between the value of thermal conductivity to the husk material in each sample has a positive relationship between time and temperature variables, in other words, the more time the temperature increases, the faster the temperature increases. From the results of the study, it can be concluded that the best thermal conductivity is in sample one with a value of 1.5375 J/ (K.m) and the poorest is in sample four with the lowest conductivity value of 0.3125 J/ (K.m).","PeriodicalId":497807,"journal":{"name":"Jurnal Fisika Unand","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135148949","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}

引用次数: 0

Strain-Induced Control of Magnetic Anisotropy Energy in NbS2 Monolayer: First-Principles Study 应变诱导的NbS2单层磁各向异性能控制:第一性原理研究

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.667-674.2023

Berton Maruli Siahaan, Afrioni Roma Rio

引用次数: 0

Analisis Sifat Fisis dan Mekanik Biodegradable Foam Berbahan Dasar Selulosa Jerami Padi dan Polivinyl Alcohol 基于稻草纤维素和聚乙烯醇的生物降解泡沫的物理和机械特性分析

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.621-627.2023

Helmi Haiqal, Mulda Muldarisnur

{"title":"Analisis Sifat Fisis dan Mekanik Biodegradable Foam Berbahan Dasar Selulosa Jerami Padi dan Polivinyl Alcohol","authors":"Helmi Haiqal, Mulda Muldarisnur","doi":"10.25077/jfu.12.4.621-627.2023","DOIUrl":"https://doi.org/10.25077/jfu.12.4.621-627.2023","url":null,"abstract":"Research has been carried out on analyzing the physical and mechanical properties of biodegradable foam made from rice straw cellulose with a polyvinyl alcohol binding matrix. This study aims to produce a substitute for styrofoam, which is considered not environmentally friendly and harmful to health. The composition of straw fiber and polyvinyl alcohol was varied by the mass ratio of the mixture of rice straw fiber and PVA (%) 40:20%, 30:30%, 20:40%, 50:10%, with the size of the fiber passing through the 80 mesh sieve. The results of the characterization using FT-IR showed that the highest content of functional groups was carbon (C), which corresponds to the content of conventional biofoam, which consists of the elements carbon (C) and hydrogen (H). The highest biofoam tensile strength value is in the comparison fraction (20:40%) of 18.11 MPa. The highest percentage of biofoam water absorption was obtained in the fraction ratio (50:10%) of 0.8928% in the treated sample and 1.1928% in the untreated sample. The percentage of biofoam water content closest to conventional biofoam water content is obtained at a fraction ratio (40:20%) of 0.78%. The highest degradation rate was obtained in samples with a comparative fraction (50:10%) of 0.04237%/day in treated and 0.06403%/day in untreated samples. The results of this study stated that the resulting biofoam did not contain harmful substances. After identifying the functional groups using the FT-IR test, the tensile strength of biofoam still did not meet the SNI 7188.7: 2016 bioplastic standard.","PeriodicalId":497807,"journal":{"name":"Jurnal Fisika Unand","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149224","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}

引用次数: 0

Pengaruh Penambahan Bulu Ayam dan Serbuk Kayu Terhadap Uji Fisis Papan Partikel 添加鸡毛和木粉对刨花板物理测试的影响

Jurnal Fisika Unand Pub Date : 2023-10-09 DOI: 10.25077/jfu.12.4.646-650.2023

Ririn sagita Aruan, Ririn Sagita Aruan Ety Jumiati, Miftahul Husnah

引用次数: 0

Karakteristik Koefisien Absorpsi Bunyi dan Impedansi Akustik dari Serat Alam dengan Menggunakan Metode Tabung 声音与自然纤维的声学结合的特性

Jurnal Fisika Unand Pub Date : 2023-10-04 DOI: 10.25077/jfu.12.4.548-553.2023

Palmasi Syahputra, Elvaswer Elvaswer

引用次数: 0

Sistem Booster dan Pendeteksi Kadar Alkohol Pada Fermentasi Tapai Ketan Menggunakan Sensor MQ-3 Berbasis IoT 助推器系统和酒精对发酵糯米的检测使用了mq3 -基传感器

Jurnal Fisika Unand Pub Date : 2023-10-04 DOI: 10.25077/jfu.12.4.561-567.2023

Joanica Intan Cahyandari, Harmadi Harmadi

{"title":"Sistem Booster dan Pendeteksi Kadar Alkohol Pada Fermentasi Tapai Ketan Menggunakan Sensor MQ-3 Berbasis IoT","authors":"Joanica Intan Cahyandari, Harmadi Harmadi","doi":"10.25077/jfu.12.4.561-567.2023","DOIUrl":"https://doi.org/10.25077/jfu.12.4.561-567.2023","url":null,"abstract":"Proses fermentasi tapai ketan sebagai salah satu makanan tradisional yang disukai oleh masyarakat Sumatra Barat membutuhkan waktu yang cukup lama yaitu selama +-72 jam. Fermentasi yang terlalu lama dapat menghasilkan tapai yang memiliki kandungan alkohol yang tinggi dan rasa asam yang kurang disukai masyarakat. Penelitian bertujuan untuk membuat sistem booster dan pendeteksi kadar alkohol pada fermentasi tapai ketan menggunakan sensor MQ-3 berbasis IoT. Sistem booster menggunakan elemen Peltier untuk mengontrol suhu ruang fermentasi tapai pada rentang 35°C sampai 40°C yang dideteksi oleh sensor DHT11. Peningkatan kadar gas alkohol selama proses fermentasi dideteksi oleh sensor MQ-3. Kadar gas alkohol 0,58% menjadi acuan bahwa tapai sudah matang. Hasil pengukuran suhu, kelembapan, dan kadar gas alkohol selama proses fermentasi ditampilkan pada LCD dan aplikasi Blynk berbasis IoT. Buzzer berbunyi pada saat tapai matang. Waktu fermentasi tapai ketan hitam lebih lama yaitu selama 39 jam, sedangkan tapai ketan putih selama 36 jam. Tapai ketan yang dihasilkan memiliki tekstur yang lunak, berair, dan memiliki rasa yang manis dengan kadar gas alkohol yang sama sebesar 0,58%.","PeriodicalId":497807,"journal":{"name":"Jurnal Fisika Unand","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135646922","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}

引用次数: 0

Pengaruh Nilai Ketahanan Tarik Terhadap Daya Regang Dalam Pembuatan Kertas Dari Bahan Baku Kulit Singkong dan Daun Nanas 用木薯皮和菠萝叶制成的造纸原料的抗拉价值对造纸的拉伸性的影响

Jurnal Fisika Unand Pub Date : 2023-10-04 DOI: 10.25077/jfu.12.4.518-525.2023

Mulia Ningsih, Ratni Sirait, Ety Jumiati

引用次数: 0