Jurnal Teori dan Aplikasi Fisika最新文献_第9页

Pengaruh Ethanolamina Terhadap Pembentukan Fasa, Ukuran Partikel, dan Luas Permukaan Spesifik Nanotitania Menggunakan Metode Sol Gel 乙醇对相位、颗粒大小和纳米颗粒的特异性表面的影响采用了溶胶胶的方法

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/jtaf.v9i2.2716

Renita Maharani Fauzi, Posman Manurung, Yanti Yulianti

{"title":"Pengaruh Ethanolamina Terhadap Pembentukan Fasa, Ukuran Partikel, dan Luas Permukaan Spesifik Nanotitania Menggunakan Metode Sol Gel","authors":"Renita Maharani Fauzi, Posman Manurung, Yanti Yulianti","doi":"10.23960/jtaf.v9i2.2716","DOIUrl":"https://doi.org/10.23960/jtaf.v9i2.2716","url":null,"abstract":"Nanotitania has been prepared by sol gel method using ethanolamine as surfactant. This research was conducted to determine the effect of ethanolamine on the phase formation, particle size and surface area of TiO2. In this study Ti-butoxide was used as a precursor and ethanol as a solvent, and then HCl. The amount of ethanolamine was varied to 0; 0.5; 1; 1.5; and 2 ml. The samples were calcined at a temperature of 500ºC for 4 hours. TiO2 was characterized using X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and Surface Area Analyzer (SAA) with BET method. The results of XRD characterization showed that in samples A-0.0 and A-0.5 an anatase phase was formed, whereas in the sample A-1,0 and A-1,5 an anatase, brookite, and rutile phases were formed with a weight percentage of 57,65 ± 1,6% wt; 27,06 ± 1,8% wt, and 15,29 ± 0,4% wt. Meanwhile, for sample A-1,5 it is 69,96 ± 1.6% wt, 24,52 ± 1,5% wt, and 5,52 ± 0,3% wt. Sample A-2.0 only produced anatase and brookite phases with weight percentages of 78,53 ± 1.5% wt and 21,47 ± 1.5% wt. The results of TEM characterization using ImageJ software show that the TiO2 particle size in sample A-1,0 was 15,8 ± 1,0 nm. The results of the analysis surface area of sample A-1, produced the largest specific surface area, that is 172 m2/g, the smallest specific surface area was produced in sample A-1,5 that is 72,07 m2/g.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132756870","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 Medan Listrik sebagai Stimulan Pertumbuhan Bawang Putih Lokal Timor 电场对当地大蒜生长的影响

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2815

Gede Arya Wiguna, Welsiliana Welsiliana, F. M. P. Makin, Ite Morina Yostianti Tnunay

引用次数: 1

Sintesis Soluble Polianilin dengan Variasi Jenis dan Konsentrasi Dopan

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2809

Retno Wulandari, Nugrahani Primary Putri

引用次数: 3

Gempa Bumi : Hubungan Data Sensor MAG3110 dengan Data Sensor ADXL345 Berbasis IoT 地震:MAG3110传感器数据与ADXL345传感器相关

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2802

Dodik Setyawan, Nurfiana Nurfiana, Lia Rosmalia, M. Setiawati

{"title":"Gempa Bumi : Hubungan Data Sensor MAG3110 dengan Data Sensor ADXL345 Berbasis IoT","authors":"Dodik Setyawan, Nurfiana Nurfiana, Lia Rosmalia, M. Setiawati","doi":"10.23960/JTAF.V9I2.2802","DOIUrl":"https://doi.org/10.23960/JTAF.V9I2.2802","url":null,"abstract":"The earthquake early warning system was built by implementing the IoT-based telemetry method to measure the earth's magnetic flux and vibrations at the latitude coordinates and longitude coordinates (-5.640274, 104.3050093), (-5.600941, 104.7788183) through the MAG3110 and ADXL345 sensors that were integrated in the raspberry pi3 as a server and applications on Android phones used for measurement data display. The result of the measurement data was that the average impact of the arising earth anomaly and vibration at the same coordinates took 400 seconds in the anomaly range of 395 μT to 404 μT. The conclusion of this study was that the study was able to be used as a basic to design the real-time earthquake warning system. Abstrak. Untuk membangun sistem peringantan dini gempa bumi kami menerapkan metode telemetri berbasis IoT untuk mengukur flux magnet bumi dan getaran pada pada koordinat lintang dan bujur bumi (-5.640274, 104.3050093) dan (-5.600941, 104.7788183) menggunakan sensor MAG3110 dan ADXL345 yang diintegrasikan dalam raspberry pi3 sebagai server dan aplikasi di handphone android digunakan untuk menampikan data pengukuran. Hasil pengukuran yang diperoleh rata-rata impact yang ditumbulkan dari timbulnya anomali dengan datangnya getaran pada koordinat yang sama membutuhkan waktu 400 detik dari rentang anomali sebesar 395 µT sampai dengan 404 µT. Hal ini menurut peneliti dapat dijadikan dasar untuk membangun sistem peringatan gempa bumi secara real time.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133813129","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

Sintesis Magnesium Oksida (MgO) dari Dolomit Bangkalan dengan Metode Leaching 用Leaching方法合成班基的氧化镁(MgO)

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2808

D. Saputri, L. Rohmawati

{"title":"Sintesis Magnesium Oksida (MgO) dari Dolomit Bangkalan dengan Metode Leaching","authors":"D. Saputri, L. Rohmawati","doi":"10.23960/JTAF.V9I2.2808","DOIUrl":"https://doi.org/10.23960/JTAF.V9I2.2808","url":null,"abstract":"Magnesium oxide (MgO) is a ceramic material that has potential in the medical and industrial fields, where MgO can be obtained from natural dolomite which has a composition of 21.9% MgO and 54.3% CaCO3. However, MgO from dolomite has not been studied much so that this study was conducted with the aim of analyzing the effect of the holding time of calcination on the synthesized MgO phase. The MgO synthesis method uses the Leaching method, which is dissolving dolomite with HCl and stirring it at 75 ° C for 45 minutes. After that, it is filtered where the results of the filtrate are added with ammonia until the solution reaches pH 12 and a precipitate is formed. Furthermore, the precipitate was filtered and dried at 90 ° C for 6 hours, and calcined at a temperature of 800 ° C with a variation of the holding time of 4, 8, 12, 16, and 20 hours. The calcined powder was characterized by XRD and FTIR. The results showed that the optimum MgO periclase main phase was formed at a holding time of 8 hours at a calcination temperature of 800 ° C and had a nanocrystalline size of 20.12 nm. FTIR results show that the MgO synthesized with a holding time of 8 hours has functional groups Mg-O, Mg-O-Mg, C = O, alkene groups, and H-O-H in the wave number range of 4000 cm-1 - 500 cm-1.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132456183","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

PENGARUH KONSENTRASI INHIBITOR KOROSI EKSTRAK KULIT PISANG KEPOK (Musa paradisiaca L) TERHADAP LAJU KOROSI BAJA KARBON API 5L PADA SUHU PERENDAMAN 40OC DAN 80OC 香蕉皮腐蚀补充剂(摩西自体L)对火焰钢腐蚀速度5L的影响，在40OC和80OC浸泡温度下

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2719

Titan Nurahman, E. G. Suka, L. Rumiyanti

{"title":"PENGARUH KONSENTRASI INHIBITOR KOROSI EKSTRAK KULIT PISANG KEPOK (Musa paradisiaca L) TERHADAP LAJU KOROSI BAJA KARBON API 5L PADA SUHU PERENDAMAN 40OC DAN 80OC","authors":"Titan Nurahman, E. G. Suka, L. Rumiyanti","doi":"10.23960/JTAF.V9I2.2719","DOIUrl":"https://doi.org/10.23960/JTAF.V9I2.2719","url":null,"abstract":"Research has been carried out on the effect of the concentration of Kepok banana peel extract as an inhibitor on API 5L carbon steel in 3% NaCl corrosive medium. API 5L carbon steel immersion was carried out for 7 hours with two variations of immersion temperature, namely 40 and 80 oC and five variations in the concentration of corrosion inhibitors, namely 0%, 2%, 4%, 6%, 8%. Corrosion rate testing was carried out using the weight loss method. The results showed that the largest corrosion rates at immersion temperatures of 40 and 80 oC were at 0% inhibitor concentrations, namely 60.91 mm / y and 86.91 mm / y. Meanwhile, the lowest corrosion rate was at the inhibitor concentration of 8% at immersion temperatures of 40 and 80 oC, namely 32.51 mm / y and 63.92 mm / y. The greatest effectiveness of corrosion inhibitors occurred at a concentration of 8% at immersion temperatures of 40 and 80 oC of 56.63%, and 26.44%. The results of the X-Ray Diffraction (XRD) characterization showed that the phase formed was pure Fe. Scanning Electron Microscopy (SEM) characterization showed uneven clusters and smaller size, holes and cracks were also less in 8% inhibitor at immersion temperature of 40 and 80 oC compared to inhibitor 0% at immersion temperature 40 and 80 oC.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132562421","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 an Earthquake Intensity Estimation System for Early Warning 地震烈度预警估计系统的设计

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2803

Trismahargyono Trismahargyono, S. R. Sulistiyanti, R. Marjunus

{"title":"Design of an Earthquake Intensity Estimation System for Early Warning","authors":"Trismahargyono Trismahargyono, S. R. Sulistiyanti, R. Marjunus","doi":"10.23960/JTAF.V9I2.2803","DOIUrl":"https://doi.org/10.23960/JTAF.V9I2.2803","url":null,"abstract":"Indonesia is located at the junction of three tectonic plates and has many active faults. The consequence of this tectonic arrangement makes Indonesia prone to earthquakes. Therefore, earthquake mitigation efforts based on an early warning system need to be done. The design of an earthquake strength estimation system, based on python, for this early warning, analyzes the initial phase of the first three seconds since the arrival of the P wave, using parameters in the form of Pd (the maximum amplitude of the first three seconds of the arrival of the P wave). The resulting tools and systems consist of hardware in the form of Raspberry Pi3B + and ADXL345. The system will detect in real time and automatically trigger an earthquake using the STA / LTA method. When the Pd and Td parameters have been obtained, the system will calculate and issue earthquake strength information, in the form of magnitude and intensity scale of earthquake damage MMI (Modified Mercally Intensity), which will then be sent automatically via the telegram application. Testing of tools and systems was carried out in an earthquake simulator, using the Padang earthquake parameters on 30 September 2009, 17:16:09 WIB. The results of the test produce an intensity scale of VIII MMI, these results are close to the results of the BMKG for the earthquake, with an intensity scale of VIII MMI. From these results the designed tools and systems can be used to provide early warning in the event of an earthquake.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124096841","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

Sintesis Hidroksiapatit dari Tulang Ikan Sapu-Sapu (Hypostomus plecostomus) dengan Metode Presipitasi 用折射方法从扫帚骨中合成水分

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-07-31 DOI: 10.23960/JTAF.V9I2.2818

Sri Maulidiyah Mangkuasih, L. Rohmawati

{"title":"Sintesis Hidroksiapatit dari Tulang Ikan Sapu-Sapu (Hypostomus plecostomus) dengan Metode Presipitasi","authors":"Sri Maulidiyah Mangkuasih, L. Rohmawati","doi":"10.23960/JTAF.V9I2.2818","DOIUrl":"https://doi.org/10.23960/JTAF.V9I2.2818","url":null,"abstract":"Abstract. Fish bone contains about 62.31% CaO and 37.46% P2O5 so that it can be used as hydroxyapatite material. This composition is also contained in the bone of the broom fish (Hypostomus plecostomus) which is known from the XRF test. Therefore, the purpose of this study was to determine the phase and functional group of hydroxyapatite from broomstick fish bones. Synthesis of hydroxyapatite from broomstick fish bones using the precipitation method, namely as much as 7 grams of CaO dissolved in 100 ml of distilled water and heated at 90°C then added 100 ml of 0.6 M H3PO4 to obtain a clear solution. Then the solution was added with 1 M NaOH until it reached pH 10, allowed to stand for 24 hours and a precipitate was formed. After that, it was heated at a temperature of 900°C with a holding time variation of 5 hours and 7 hours and then cooled at room temperature. The results of this synthesis were characterized by XRD and FTIR. Based on the XRF results, the broom fish bone has a CaO content of 81.37%. The main phase of hydroxyapatite was formed optimally at a holding time of 7 hours and had a crystal size of 32.39 nm which was calculated based on the Scherrer equation. FTIR results show that hydroxyapatite consists of three main functional groups, namely phosphate , hydroxyl (OH-) and carbonate in the wave range of 4000 cm -1 – 500 cm -1 . Thus, in this study, hydroxyapatite from broom fish bones was successfully synthesized. Keywords : Hydroxyapatite, CaO, broom fish bone, Precipitation.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128122249","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

Pengukuran Modulus Geser Baja Menggunakan Analisis Osilasi Pegas-Massa 采用s- mass振荡分析的钢剪接器测量

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-01-31 DOI: 10.23960/JTAF.V9I1.2606

Samuel Hia, Albertus Hariwangsa Panuluh

引用次数: 1

Pengaruh Tegangan Tabung terhadap Kualitas Citra pada Pemeriksaan Computed Tomography Kepala menggunakan Iterative Reconstruction 管子张力对计算层析成像检查图像质量的影响，使用重复重建

Jurnal Teori dan Aplikasi Fisika Pub Date : 2021-01-31 DOI: 10.23960/jtaf.v9i1.2715

M. Irsal, N. Nurbaiti, Aulia Narendra Mukhtar, Shinta Gunawati, Wahyu Hidayat

{"title":"Pengaruh Tegangan Tabung terhadap Kualitas Citra pada Pemeriksaan Computed Tomography Kepala menggunakan Iterative Reconstruction","authors":"M. Irsal, N. Nurbaiti, Aulia Narendra Mukhtar, Shinta Gunawati, Wahyu Hidayat","doi":"10.23960/jtaf.v9i1.2715","DOIUrl":"https://doi.org/10.23960/jtaf.v9i1.2715","url":null,"abstract":"Iterative reconstruction can optimize radiation dose and improve image quality on CT scan. This research method is quantitative analytic with the analysis of the results of the head CT examination parameters associated with image quality to changes in variations of 80 kV, 100 kV, 120 kV with the use of iterative reconstruction. Image quality measurements are the Hounsfield Unit (HU) value, standard deviation, and Signal to Noise Ratio (SNR) using Radiant Viewers. Effective dose measurement using the Dose Length Product (DLP). Then perform the Kruskal Wallis test to find out whether there is an effect of tube voltage and Iterative Reconstruction on the SNR value using IBM SPSS version 24. The results image quality of the HU value increase due to changes in the kV value, but the value does not change significantly when the iDose changes, for the standard The deviation has decreased due to changes in kV, but the value of the value does not experience a significant change at the time of change in iDose, while SNR increases due to changes in kV value and changes in iDose. The percentage ratio of the effective dose in the use of standard kV with 80 kV decreased radiation dose by 62%, while at 100 kV there was a decrease of 25%, and the use of 120 kV experienced an increase of 25%. The results of the Kruskal Wallis test p-value <0.001, therefore it can be concluded that there is a difference in the SNR image quality at each change in iDose and kV parameters.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114438803","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