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The Effect of Firing Temperature on Water Absorption and Flexural Strength on The Preparation of Stoneware Ceramic (Coded-BL1P) 烧制温度对陶瓷(code - bl1p)制备过程中吸水率和抗弯强度的影响
Buletin Fisika Pub Date : 2019-04-22 DOI: 10.24843/bf.2019.v20.i01.p05
G. Sujana, P. Suardana, Totok Nugroho
{"title":"The Effect of Firing Temperature on Water Absorption and Flexural Strength on The Preparation of Stoneware Ceramic (Coded-BL1P)","authors":"G. Sujana, P. Suardana, Totok Nugroho","doi":"10.24843/bf.2019.v20.i01.p05","DOIUrl":"https://doi.org/10.24843/bf.2019.v20.i01.p05","url":null,"abstract":"It has been investigated the effect of firing temperature on water absorption and flexural strength in the manufacture of BL1P code stoneware ceramics. Ceramics are made in the form the test block bar with materials from of Borneo Clay Noodle, PRC Feldspar, Kaolin Belitung, Belitung Quartz, Ballclay Bantur, Bentonite, and Talk with a simple casting method. The block bar of the molds was burned at four temperature variations, i.e. 850, 900, 1000, and 1200 oC. From the results of measurements of it water absorption, it was found that the increase in firing temperature from 850 oC to 1200 oC showed a decrease in water absorption from 18.3% to 5.5%, while the measurement of it flexural strength showed an increase in flexural strength of 11.6 kg/cm2 to 19.8 kg/cm2.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2019.v20.i01.p05","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43137827","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: 2
Effects of Photosynthetic Activity Radiation (PAR) on Green Mustard Plant Growth (Brassica rapa var. parachinensis L.) 光合活性辐射(PAR)对绿芥菜生长的影响
Buletin Fisika Pub Date : 2019-04-12 DOI: 10.24843/bf.2019.v20.i01.p04
N. Ratini, I. Supardi, Yuli Nurfadhillah
{"title":"Effects of Photosynthetic Activity Radiation (PAR) on Green Mustard Plant Growth (Brassica rapa var. parachinensis L.)","authors":"N. Ratini, I. Supardi, Yuli Nurfadhillah","doi":"10.24843/bf.2019.v20.i01.p04","DOIUrl":"https://doi.org/10.24843/bf.2019.v20.i01.p04","url":null,"abstract":"A research on the effect of photosynthetic active radiation (PAR) on the growth of green mustard plants has been conducted. The radiation source used is sunlight. Samples have been grouped as a sample which treated by red filter (P1), by orange filter (P2), by purple filter (P3), by green filter (P4), by blue filter (P5) and a sample without filter as a control (P0). Each sample consisted of four plants. The planting was carried out using polybags with compost media. Observations were made from the nursery phase to the slow vegetative phase (day 3rd, when all plants had grown shoots until day 63rd of the harvest). Parameters measured include light intensity, plant height and number of leaves. Measurement is done every three days. Also it measured plant biomass on the last day of observation (63rd day). The results showed that the intensity of each sample had an impact on the harvest. The best growth rate is obtained in P2, both in the nursery phase and fast vegetative phase i.e. 0.119 cm/day and 0.194 cm/day, respectively. While the highest growth rate was obtained in the P3 sample, namely the slow vegetative phase (0.035 cm/day). Overall the best planting results were obtained in P2 samples with plant height of 23.18 cm, number of leaves of 12 strands and plant biomass of 33.56 g.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2019.v20.i01.p04","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44667430","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
Effect of Silver (Ag) Addition on the Forming Of Y-247 Superconductors (Y2Ba4Cu7O15-?) using Wet Mixing Method 银（Ag）的添加对湿混合法制备Y-247超导体（Y2Ba4Cu7O15-？）的影响
Buletin Fisika Pub Date : 2019-03-08 DOI: 10.24843/bf.2019.v20.i01.p03
A. W. Putra, W. Suharta, P. Suardana
{"title":"Effect of Silver (Ag) Addition on the Forming Of Y-247 Superconductors (Y2Ba4Cu7O15-?) using Wet Mixing Method","authors":"A. W. Putra, W. Suharta, P. Suardana","doi":"10.24843/bf.2019.v20.i01.p03","DOIUrl":"https://doi.org/10.24843/bf.2019.v20.i01.p03","url":null,"abstract":"Superconductor Y-247 (Y2Ba4Cu7O15-?) with adding silver (Ag) by using the wet-mixing method has been done. The synthesis process was carried out by calcination at 600o C for 3 hours and sintered at 925o C for 10 hours. Variations in the increase in the addition of Ag used were Ag0.05, Ag0.1, Ag0.15 and Ag0.2. Characterization of X-Ray Diffraction (XRD), showed an increase in the addition of Ag resulting in a decrease in the volume fraction, where the volume fractions obtained consecutive were 55.0%, 51.3%, 50.9% and 46.3%. Increasing the addition of Ag results in an increase in the lattice parameter values in the direction of the a axis which is 3.8247 Å, 3.8291 Å, 3.8292 Å, 3.8293 Å, decreasing the lattice parameter values in the b axis direction which is 3.8426 Å, 3.8415 Å, 3.8409 Å, 3.8383 Å and decreasing the lattice parameter values in the direction of the c axis are 49.2174 Å, 49.2022 Å, 49.1881 Å, 49.1761 Å. Analysis of the results of the characterization of Scanning Electron Microscopy (SEM), the particle size obtained was 225.47 nm, 202.88 nm, 190.68 nm and 172.22 nm.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2019.v20.i01.p03","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43742676","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
Chitosan as A Silver (Ag) Adsorbent on Hospital Photography Fixer Waste 壳聚糖作为银（Ag）吸附剂吸附医院摄影定影废液
Buletin Fisika Pub Date : 2019-02-10 DOI: 10.24843/bf.2019.v20.i01.p02
D. D. Fernanda, N. N. Rupiasih, N. Wendri, Ni Wayan Eri Sandriani
{"title":"Chitosan as A Silver (Ag) Adsorbent on Hospital Photography Fixer Waste","authors":"D. D. Fernanda, N. N. Rupiasih, N. Wendri, Ni Wayan Eri Sandriani","doi":"10.24843/bf.2019.v20.i01.p02","DOIUrl":"https://doi.org/10.24843/bf.2019.v20.i01.p02","url":null,"abstract":"Abstrak – A research on the use of chitosan as an adsorbent of silver (Ag) on the photography fixer waste from hospital has been carried out. Chitosan used was in the form of powder and membrane. Chitosan powder used was 0.5 g, 1 g, 2 g and 5 g, and the membrane used was a 2% chitosan membrane of 5 g. The adsorbent materials added to 50 mL of fixer waste and soaked for 24 hours. The Whatmann filter paper was also used by filtering method. The results showed that the 2% chitosan membrane of 5 g gave the highest silver adsorption percentage of 95.99%. The percentage of adsorption by chitosan powder of 0.5, 1, 2 and 5 g were 4.41%, 6.43%, 7.82% and 36.42% respectively. While the percentage of silver adsorption by Whatman filter paper was 0.05%. The used of chitosan in the form of membrane is the most effective adsorbent of silver on photographic fixer wastes.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2019.v20.i01.p02","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47666794","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: 2
The Design of a Homogeneous Magnetic Field Generator for Applications in Membrane Making 膜制造用均匀磁场发生器的设计
Buletin Fisika Pub Date : 2019-01-23 DOI: 10.24843/bf.2019.v20.i01.p01
Ida Ayu Putu Inten Gayatri, N. N. Rupiasih, M. Sumadiyasa
{"title":"The Design of a Homogeneous Magnetic Field Generator for Applications in Membrane Making","authors":"Ida Ayu Putu Inten Gayatri, N. N. Rupiasih, M. Sumadiyasa","doi":"10.24843/bf.2019.v20.i01.p01","DOIUrl":"https://doi.org/10.24843/bf.2019.v20.i01.p01","url":null,"abstract":"It has been designed a homogeneous magnetic field (B) generation system in a particular room. This is important to conduct research related to the effects of magnetic field exposure on chemical reactions, especially in the process of making membranes. The development was carried out using four Helmholtz coils which radius (R) of 15 cm and number of turn (N) of 130 turns, that connected in parallel and coaxial. The both coils were fixed at the same distance as the radius of the coil that intended to get a homogeneous magnetic field between the both coils. The design has been tested by measuring a magnetic field generated as function of a current (I) given. The results show that, for x is the distance from the midpoint of the both coils to a certain distance, the homogeneous magnetic field obtained in the region of -7 cm < x <+7 cm, the area between the both coils. The magnitude of the homogeneous magnetic field produced depends on the electric current given.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2019.v20.i01.p01","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48625431","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
Designing a Heart Rate and Body Temperature Measurement Tool Using Pulse Sensor and IR MLX90614 Based on ATmega328 and GSM Technology 基于ATmega328和GSM技术的脉冲传感器和红外MLX90614心率体温测量仪的设计
Buletin Fisika Pub Date : 2018-12-30 DOI: 10.24843/bf.2018.v19.i02.p07
H. Hatimah, A. Gunawan, I. Paramarta
{"title":"Designing a Heart Rate and Body Temperature Measurement Tool Using Pulse Sensor and IR MLX90614 Based on ATmega328 and GSM Technology","authors":"H. Hatimah, A. Gunawan, I. Paramarta","doi":"10.24843/bf.2018.v19.i02.p07","DOIUrl":"https://doi.org/10.24843/bf.2018.v19.i02.p07","url":null,"abstract":"The measurement of heart rate and body temperature are two of the five Vital Signs that indicate human health. During this time the heart rate is measured using a stethoscope or counting the heart rate through the wrist but this can cause a Human Error. So a tool is designed that can measure heart rate and body temperature using pulse sensor and IR MLX90614 besed on ATmega328 which results can be displayed through the website with patients having their own ID so that the data is not mixed with other patient data and equipped with a database so that it can store patient data. From the results of trials on 3 subjects classified according to the age of 5, 9 and 23 years. The average accuracy of heart rate and body temperature measurements between the design tools and standard equipment is 98.54% for heart rate and 95.97% for body temperature.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2018.v19.i02.p07","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44138457","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: 2
Analysis of Changes in Area of Mangrove Density at Ngurah Rai Bali Grand Forest Park Using Image of Landsat 8 Satellite 利用Landsat 8卫星图像分析Ngurah Rai Bali大森林公园红树林密度面积的变化
Buletin Fisika Pub Date : 2018-12-30 DOI: 10.24843/bf.2018.v19.i02.p04
K. Darmo, K. N. Suarbawa, I. Widagda
{"title":"Analysis of Changes in Area of Mangrove Density at Ngurah Rai Bali Grand Forest Park Using Image of Landsat 8 Satellite","authors":"K. Darmo, K. N. Suarbawa, I. Widagda","doi":"10.24843/bf.2018.v19.i02.p04","DOIUrl":"https://doi.org/10.24843/bf.2018.v19.i02.p04","url":null,"abstract":"The study is report about to estimate the change of mangrove density level of Ngurah Rai Bali Forest Park from 2014 until 2017 using image of Landsat satellite 8 which was processed with ArcGis software. The density level was determined by using the NDVI method and grouped according to the NDVI range according to the Ministry of Forestry’s rules of 2005. The result shows that in the rare area, the change in the area of density reduced by 23.67 ha, in medium area decreased by 16.74 ha, in the tight area increased by 24.3 ha, and in the total area of mangrove reduced by 16.11 ha. Those results obtained with accuracy of 100 %, 67 %, 93% and 90 % in rare area, medium area, tight area and total area, respectively.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44431145","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: 1
Determination of vp/vs on Bali Province: Case of Bali Earthquake March 22, 2017 巴厘省vp/vs的测定：以2017年3月22日巴厘岛地震为例
Buletin Fisika Pub Date : 2018-12-30 DOI: 10.24843/bf.2018.v19.i02.p06
Febi Niswatul Auliyah, K. N. Suarbawa, I. Indira
{"title":"Determination of vp/vs on Bali Province: Case of Bali Earthquake March 22, 2017","authors":"Febi Niswatul Auliyah, K. N. Suarbawa, I. Indira","doi":"10.24843/bf.2018.v19.i02.p06","DOIUrl":"https://doi.org/10.24843/bf.2018.v19.i02.p06","url":null,"abstract":"P-wave velocity and S-wave velocity have been investigated in the Bali Province by using earthquake case studies on March 22, 2017. The study was focused on finding out whether there were anomalies in the values of vp/vs before and after the earthquake. Earthquake data was obtained from the Meteorology, Climatology and Geophysics Agency (BMKG) Region III Denpasar, which consisted of the main earthquake on March 22, 2017 and earthquake data in August 2016 to May 2017. Data was processed using the wadati diagram method, obtained that the vp/vs on SRBI, IGBI, DNP and RTBI stations are shifted from 1.5062 to 1.8261. Before the earthquake occurred the anomaly of the value of vp/vs was found on the four stations, at the SRBI station at 10.35%, at the IGBI station at 16.16%, at DNP station at 12.27% and at RTBI station at 4.62%.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/bf.2018.v19.i02.p06","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43138513","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
Analysis of Leachate of Soil Water Pollution Using Geo-electrical Methods in Final Processing Place (TPA) Regional Sarbagita 用地电法分析沙巴吉塔最终处理场（TPA）土壤水污染渗滤液
Buletin Fisika Pub Date : 2018-12-30 DOI: 10.24843/BF.2018.V19.I02.P03
Ni Kadek Sugestiani, I. K. Sukarasa, I. K. Putra
{"title":"Analysis of Leachate of Soil Water Pollution Using Geo-electrical Methods in Final Processing Place (TPA) Regional Sarbagita","authors":"Ni Kadek Sugestiani, I. K. Sukarasa, I. K. Putra","doi":"10.24843/BF.2018.V19.I02.P03","DOIUrl":"https://doi.org/10.24843/BF.2018.V19.I02.P03","url":null,"abstract":"A research about analysis of leachate of soil water pollution using geo-electrical methods in final processing place (TPA) regional sarbagita has been conducted. The measurements were made on 4 tracks by using a Naniura NDR 300HF resistivity meter. The results show on track 1 and track 2 indicate there is a leachate with a resistivity value ranging from 2.67 to 5.74 ?m and 3.15 to 9.19 ?m respectively, on track 3 indicate that the distribution of leachate has decreased compared to paths 1 and 2, on the 3 leachate path there are only certain points with resistivity values ranging from 6.57 to 9.66 ?m. Measurement results on track 4 the resistivity is greater than 10 ?m, this indicates that on track 4 there is no leachate pollution. The results of the analysis of well water samples which are located right on tracks indicating the content of BOD (biochemical oxygen demand), COD (chemical oxygen demand), Cyanide (CN), Lead (Pb), E. coli and coliform which exceeded the quality standard limits.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43197545","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
The Study of Current-Voltage (I-V) Characteristic Curve of Chitosan-Silver Nanoparticle Composite Membrane 壳聚糖-银纳米粒子复合膜电流-电压特性曲线的研究
Buletin Fisika Pub Date : 2018-08-01 DOI: 10.24843/BF.2018.V19.I02.P01
M. Islami, N. N. Rupiasih, M. Sumadiyasa, I. Manuaba
{"title":"The Study of Current-Voltage (I-V) Characteristic Curve of Chitosan-Silver Nanoparticle Composite Membrane","authors":"M. Islami, N. N. Rupiasih, M. Sumadiyasa, I. Manuaba","doi":"10.24843/BF.2018.V19.I02.P01","DOIUrl":"https://doi.org/10.24843/BF.2018.V19.I02.P01","url":null,"abstract":"A study of the current-voltage (I-V) curve of the chitosan-silver nanoparticle composite membrane (Ch-AgNP) has been conducted. Membranes were prepared by casting method using chitosan as matrix, acetic acid 1% as solvent and silver nanoparticle (AgNP) as filler. AgNP used was 100 ?g. As a comparison is a pure chitosan membrane (membrane Ch). The I-V measurement was performed using a cell model consisting of 2 chambers, chambers 1 and 2. The voltage (V) was measured using Ag/AgCl calomel electrode in electrolyte solution of KCl and CaCl2 with concentration of 0.025 M. All measurements were done at room temperature ± 28 0C. The result shows that in the current range 0.66-0.98 mA, the I-V curve of the Ch-AgNP membrane is ohmic. The conduction value of the composite membrane is smaller than that of the chitosan membrane and the value is greater in the KCl solution than in CaCl2 solution. \u0000 ","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.24843/BF.2018.V19.I02.P01","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41562697","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: 1
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