JPSE (Journal of Physical Science and Engineering)
JPSE (Journal of Physical Science and Engineering) is published twice a year in April and October by Physics Department of Universitas Negeri Malang, Indonesia. e-ISSN: 2541-2485
The journal is devoted to publishing original, frontier and important of various branches of Physics Science and Engineering.
Editors welcome scholars, researchers and practitioners of Physics around the world to submit scholarly articles to be published through this journal (free of charge).
Articles
84 Documents
<![CDATA[UJI POTENSIODINAMIK MATERIAL PELAPIS ANTI- KOROSI: Acrylic Paint-PANi/SiO2 ]]>
<![CDATA[Munasir Munasir]]>;
<![CDATA[H Umah]]>;
<![CDATA[D M T Syahra]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Polyaniline (PANi) was succesfully prepared from Ammonium Peroxodisulfate (APS) and anyline using chemical oxidation method. Silica (SiO2) was synthesized from natural sands taken from Banjar. PANi/SiO2 composites were prepared using mechanical mixing route. The composites were prepared by variating the weight compositions of PANi:SiO2 of 2.5%, and 5% for SiO2. Furthermore, the coating process of Paint-PANi/SiO2 on SS304 stainless stell by spray coating technique. The characterization of anticorrosive behaviour of Paint-PANi/SiO2 was tested by potentiodynamics method. The obtained Tafel curve was then analyzed by means of ANOVA method. The best anticorrosive performance refered to the sample of Paint-PANi/(5%)SiO2, both of before and after exposure processes. The corrotion rate of before and after exposure processes were 0,00896000 mpy and 0,00024408, respectively. DOI: http://dx.doi.org/10.17977/um024v1i12016p025]]>
<![CDATA[Pemberian Syarat Reflektif Kecepatan Fluida di Batas Anomali Kedalaman dalam Simulasi Persamaan Air Dangkal ]]>
<![CDATA[Nugroho Adi Pramono]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[The simulation of shallow water equation with straight configuration reflective depth anomaly has been performed. This program simulated wave absorber in the beach in order to prevent furthur abrasion of by sea. This program using modified Navier-Stokes equation and running on Matlab program. The result show that depth-anomaly reduced the amount on wave amplitudo by significant value.DOI: http://dx.doi.org/10.17977/um024v1i12016p007]]>
<![CDATA[Pendeposisian Besi pada Subtrat Alumunium dengan Metode Sputtering Terhadap Variasi Suhu ]]>
<![CDATA[Handoyo Saputro]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[The sample was a sputtered iron by aluminium substrate at variations of 60oC to 180oC with 3 hours of deposition time. The research result showed that some colour changing those partially golden yellow mix with red, blue and some of the grey. Micro-hardness was tested using MXT70 model and showed that the maximum hardness level at the temperature of 100oC is 113%. However, at temperature 180oC the hardness level decreased. The resistivity and conductivity were determined by four points probe method. It was known that the resistivity decreases up to (66 ± 3) x 10-5 Ω/m and the conductivity increases (147 ± 65) (Ω/m)-1 at temperature 180oC and they tended to be linear and it has been the best measurement result. DOI: http://dx.doi.org/10.17977/um024v1i12016p029]]>
<![CDATA[Study on Physical Properties of Reduced Graphene Oxide from Heating Coconut Shell ]]>
<![CDATA[Mas’udah Kusuma Wardhani]]>;
<![CDATA[Fahmi Astuti]]>;
<![CDATA[Darminto Darminto]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[A research to determine the solar activity in the months from January to March 2015, and analyze the characteristics of flare on the rotation angle shifting of the sunspot group of sunspot sample observed, has been conducted. The method was observation and descriptive analysis of quantitative data. Determination of coordinates of sunspot was done using the software IDL. These observations were made in the Aerospace Observation Center (BPD) LAPAN Watukosek. Data were analyzed in the form of a sketch-owned BPD Sunspot LAPAN Watukosek, ie sunspot sketch of months from January to March in 2015 and the data was taken from NOAA. The results showed that the flare is not always the case in large class of sunspot groups, however, the small class was able to produce a flare. Most flares ware occur after experiencing a shift angle in the preceding or following although with angles that were not too large (<10 °). The highest solar activity was occurred in January 2015 with the appearance of a sunspot group consisting of as many as 130 in 1063 sunspots. DOI: 10.17977/um024v1i12016p001]]>
<![CDATA[Pengaruh Nanosilika terhadap Kekerasan dan Porositas Nanokomposit HA-SiO2 Berbasis Batuan Onyx Bojonegoro ]]>
<![CDATA[Yudyanto Yudyanto]]>;
<![CDATA[Yeyen Dwi Sugara]]>;
<![CDATA[Hartatiek Hartatiek]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Hydroxyapatite (HA) is one of bioceramics which used in many biomedic applications. However, HA has poor mechanical properties. HA has be composited with material which has a good mechanical properties, such as nanosilica. In this study, synthesis HA was prepared by co-precipitation method. Base material to synthesis HA is onyx rock from Bojonegoro which contain 94.33 % Ca. While phosphate obtainable from Ammonium Dihydrogen Phosphate. The vickers hardness result using micro hardness vikers show that adding nanosilica is influence the mechanical properties of HA. The value of vikers hardness at adding nanosilica 10, 20, 30% respectively are 38.2; 42.3; 43.1 HVN while the porosity are 44.4; 40.7; 39.3 %. DOI: https://dx.doi.org/10.17977/um024v1i12016p013]]>
<![CDATA[Analisis Terjadinya Flare Berdasarkan Pergeseran Sudut Rotasi Group Sunspot pada Bulan Januari – Maret 2015 Melalui LAPAN Watukosek ]]>
<![CDATA[Mochamad Fatchur Rouf Hasan]]>;
<![CDATA[Sutrisno Sutrisno]]>;
<![CDATA[Bambang Setiahadi]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[A research to determine the solar activity in the months from January to March 2015, and analyze the characteristics of flare on the rotation angle shifting of the sunspot group of sunspot sample observed, has been conducted. The method was observation and descriptive analysis of quantitative data. Determination of coordinates of sunspot was done using the software IDL. These observations were made in the Aerospace Observation Center (BPD) LAPAN Watukosek. Data were analyzed in the form of a sketch-owned BPD Sunspot LAPAN Watukosek, ie sunspot sketch of months from January to March in 2015 and the data was taken from NOAA. The results showed that the flare is not always the case in large class of sunspot groups, however, the small class was able to produce a flare. Most flares ware occur after experiencing a shift angle in the preceding or following although with angles that were not too large (<10°). The highest solar activity was occurred in January 2015 with the appearance of a sunspot group consisting of as many as 130 in 1063 sunspots. DOI: http://dx.doi.org/10.17977/um024v1i12016p019]]>
<![CDATA[Identifikasi Kerentanan Longsor Daerah Pangalengan Dengan Metode Slope Morphology ]]>
<![CDATA[R. Amukti]]>;
<![CDATA[D. Mildan]]>;
<![CDATA[I. A. Dinata]]>;
<![CDATA[N. F. Isniarno]]>;
<![CDATA[I. K. Wijaksana]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 2, No 1 (2017): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Pangalengan is located between 107o29'-107o39 'BT and 7o19'-7o6' LS. Based on its topography and geological condition, Pangalengan has steep slopes and lies between two strike-slip faults. Average annual rainfall of this area is about 1,996 mm with 5.47 mm of average daily rainfall. The area is about 27294.79 hectares with population of 148353 inhabitants. According to these data, Pangalengan has high risk of landslide. Landslide occurred in Pangalengan on 05-05-2015 at 14:00 pm, caused 9 fatalities, 4 people seriously injured, 134 people evacuated, 10 houses buried, geothermal steam flow pipe of Energy Star damaged. It is necessary to analyze slope morphology and study the potential hazard areas of landslide. The result shows that Cibitung which has steep (35o-45o) and very steep (45o-65o) slope is prone to landslide with an area of ± 3038 hectares spread to the south.DOI: http://dx.doi.org/10.17977/um024v2i12017p001 ]]>
<![CDATA[Pengukuran Sampel Magnetik Cair dengan Vibrating Sample Magnetometer (Vsm) ]]>
<![CDATA[W Z Lubis]]>;
<![CDATA[M Mujamilah]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 2, No 2 (2017): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[This article discusses the performance of Vibrating Sample Magnetometer (VSM) Oxford 1.2 H in characterizing the magnetic samples in liquid form. Samples of water-based ferrofluid placed in a capillary tube pipe. Measurement of samples with varied position, volume and concentration as well as repeated measurements are carried out to evaluate the performance. From these series of measurements, it brings that optimal volume range with measurement results that can still be accounted for is 10 µl, with samples being in equilibrium position within the pick-up coil. The smallest sample concentration which still can be observed quantitatively is 0.332 mg/mL. Repeatability test gives the value of the magnetic moment deviation of ~ 4%. The accuracy of the sample preparation and positioning of the samples is analyzed being a major factor which causes this measurement error. In general it can be concluded that the liquid sample measurement will give better results when using reverse pipetting mode when putting the liquid samples within capillary tube using a micropipette. The measurement should be done as soon as possible after preparation.DOI: https://doi.org/10.17977/um024v2i22017p039]]>
<![CDATA[Sintesis Kromium Ferit Dari Pasir Pantai dan Karakterisasi Awal Sensor Suhu ]]>
<![CDATA[Widya Elyani]]>;
<![CDATA[Arif Hidayat]]>;
<![CDATA[Ahmad Taufiq]]>;
<![CDATA[Sunaryono Sunaryono]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 3, No 1 (2018): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Ferrofluids for temperature sensor application become one of the important modern technology applications. Therefore, the development of the beach sand-based ferrofluids for temperature sensor becomes new and essential things for cutting off their production. In this research, the preliminary investigation of the temperature sensor is developed based on the chromium ferrite ferrofluids. The sample in powder and fluid were prepared by coprecipitation-sonochemical technique. The powder sample which was characterized by XRD has the crystallite size of 10 nm with high purity. The preliminary investigation shows that the chromium ferrite ferrofluid has a good property as a candidate for temperature sensor application showing a good response on the temperature treatmentDOI: http://dx.doi.org/10.17977/um024v3i12018p001]]>
<![CDATA[Destroying a Kerr Black Hole ]]>
<![CDATA[N. S. Risdianto]]>;
<![CDATA[M. F. Rosyid]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 2, No 1 (2017): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Based on three fundamentals aspects presented by Penrose, Wald, and Hawking, the black hole’s destroying scenario can be made. The main problem of this destroying process is about the presence of black hole’s angular momentum and charge. Especially for this research which is only taking an action into a rotating uncharged black hole (Kerr Black Hole). This research showed that in order to destroy a Kerr Black Hole (especially a near-extremal Kerr Black Hole) , one needs to remove its angular momentum instead by forcing it in extremal conditions and let Hawking Radiation occurs. On the other hand, the research showed that particle’s mass is linearly dependant in Penrose Process. The result also showed (which ; is a black hole’s angular momentum and is a black hole mass) cannot be reached because only black hole with negative net-energy can fulfil the condition. In another side, we calculated the minimum power needed by hole to kick the particles out.DOI: http://dx.doi.org/10.17977/um024v2i12017p007 ]]>
