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Fisitek : Jurnal Ilmu Fisika dan Teknologi
Published by Universitas Islam Negeri Sumatera Utara
ISSN : 25806661     EISSN : 2580989X     DOI : -
Core Subject : Science, Education,
Computer Science & IT Education Physics
FISITEK: Jurnal Ilmu Fisika dan Teknologi is a peer-reviewed journal which covers all aspects of theoretical and practical research of physics and their use. FISITEK is published by Physics Department of Science and Technology Faculty, State Islamic University of Sumatera Utara Medan (Universitas Islam Negeri Sumatera Utara Medan), Indonesia. FISITEK appears twice a year, in February and August. FISITEK is available in electronic and print editions.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 5, No 2 (2021)" : 5 Documents clear
analysis of mechanical properties of ceiling boards based on corn cobs and coconut coir waste with latex adhesive ety Jumiati; ufik eliati tumanggor; Abdul halim daulay
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 2 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i2.10003

Abstract

AbstractCeiling evelopment by utilizing waste corn cobs, coconut coir with gypsum flour an the adition of latex adhesive. Variations in the composition of the mixture of corn cobs, coconut coir, gypsum flour with latex adhesive include sample A (0:0:100:15), sample B (3:3:94:15), sample C (6:6:88:15), sample D (9:9:82:15), sample E (12:12:76:15), and sample F (15:15:70:15) with emphasis using a hot press and drying for 28 days. The test parameters include flexural strength and fracture strength. The test results show that sample B in the composition (3:3:94:15) is the optimal result. In this composition, the resulting ceiling board has the characteristics of a flexural strength of 3966,39 kgf/cm2 and a fracture strength of 1088,6 kgf/cm2.Keyword : Lateks , Ceiling Board, Coconut Coir, Corn Cob 
THE EFFECT OF VARIATION OF VOLUME SOLUTION OF WULUH STRAWELL AND KEY ORANGE SITE ON PH VALUE, ELECTRICAL PROPERTIES AND CHANGES IN ELECTRODE MASS Zafira Amalia Nasution; ratni sirait; abdul halim daulay
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 2 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i2.10142

Abstract

Research has been carried out on "The effect of increasing the volume of the solution of star fruit juice and key orange juice on the pH value, electrical properties and changes in electrode mass". This study aims to determine the effect of volume variations of starfruit juice and key oranges (0%:100%, 25%:75%, 50%:50%, 75%:25% and 100%:0%) on the pH value, voltage, current, and electric power, to determine the decrease in voltage and electric current due to the loading of the red LED lamp for 1 hour and to determine the change in the mass of the Cu-Zn electrode for 1 hour. This research was carried out with the working principle of a voltaic cell using a pair of Cu-Zn electrodes as anode and cathode connected in series. The measurement results obtained that the best sample variation is in the 100% variation of starfruit juice with a total volume of 300 ml resulting in the values of pH, voltage, current, and electric power of (2.2; 1.73 V; 1.05 mA, respectively). ; and 1.81 mW), while for the lowest sample variation, there is a variation of 100% key orange juice with a volume of 300 ml producing the values of pH, voltage, current, and electric power, respectively (2.8; 1.64 V; 0, 99 mA and 1.62 mW). The more variations in the volume of the key orange juice, the better the voltage, current and electric power. As for the test results, the loading of the red LED lights causes a decrease in voltage and electric current for 1 hour, so the longer the loading time, the dimmer the lights. Furthermore, for 1 hour the voltaic cell reaction took place, resulting in a change in the mass of the Cu-Zn electrode where the mass of the Cu electrode increased and Zn decreased. Keywords: Starfruit, key oranges, pH, electricity
ANALYSIS OF PHYSICAL PROPERTIES OF GYPSUM PANELS FROM BANANA BOARD WASTE MATERIAL Ety Jumiati; Abdul Halim Daulay; Nurhayati Nurhayati
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 2 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i2.9982

Abstract

Abstract. Research has been carried out which aims to determine the manufacture and physical properties of gypsum panels in the manufacture of gypsum panels for home interiors using banana midrib waste which is converted into fiber. Variations in the composition of mixing gypsum flour with banana midrib fiber include: Samples (A: 0%:100%) , (B: 2%:98%), (C: 4%:96%), (D: 6%:94 %), (E: 8%: 92%), and (F: 10%: 90%) with a FAS of 0.5. The physical test parameters include: Density, Water absorption, and Thickness expansion. From the test results obtained gypsum panels that are The best is in sample B which has a density value = 1.19 g/cm3, water absorption value = 24%, a thickness expansion value = 2.53%, which has complied with SNI 01-4449-2006 on the ceiling board. Key words: Gypsum panels, banana midrib, and gypsum flour.
Physic properties test for variations in the addition of kelor rods (moringa oleivera) on the lis of gypsum profile Ety Jumiati; Abdul Halim Daulay; Tri Ninda Malika
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 2 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i2.9972

Abstract

Research on composite materials has been carried out with variations in the addition of Moringa stems to the gypsum profile trim. And tested for variations in the composition of the mixture of Moringa stem fiber and gypsum flour, including: sample A (0% : 100%), sample B (2% : 98%), sample C (4% : 96%), sample D (6% : 94%), sample E (8% : 92%), sample F (10% : 90%) with FAS 0,5. The results of the characterization of the gypsum profiles produced on the physical properties test: density of 1.00-1.24 g/cm3. The value of water absorption is 24-45%. And the thickness development value is 2.27-4.82%, which meets the value of SNI 01-4449-2006. From the research data, the best sample is sample B with a density value of 1.14 g/cm3, the water absorption value is 27%, the thickness expansion value is 3.45%.Keywords :gypsum flour, list profil gypsum, moringa fiberThere has been a study of composite materials with variations of additionsKelor bars on the gypsum profile. And testing compound variationsKelor stem fibers and gypsum flour, among others: sampela (0%: 100%),Sample b (2% 98%), sample c (4% : 966), samel d (6%: 94%), sample e (8%92%), sample f (10% 90%) with fas 0.5. The fine print is the gypsum profileProduced on the test of frisis nature: a density of 1.00-1.24 g/cm3. Power valueAbsorption of 2445% water. And 2.27-4.82% thick development value, whichEnacting value o1-4449-2006. From the research data generated that sampleBest is on sample b with a density value of 1.14 g/cm, the value of permeable water279%, thick development value 3.45%.
KAJIAN DATA SATELIT HIMAWARI-8 UNTUK ANALISIS KONDISI ATMOSFER TERHADAP KEJADIAN BANJIR Frans Gabriel Sianturi
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 2 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i2.10721

Abstract

ABSTRAKHujan lebat terjadi di desa Kuta limbaru, Kecamatan Kutalimbaru, Deli Serdang, Sumatera Utara tanggal 26 Juli 2020 pukul 09.00 UTC (16.00 WIB). Berdasarkan website dari Badan Nasional Penanggulangan Bencana (BNPB), kejadian ini menghanyutkan 9 orang (8 ditemukan dan 1 meninggal  dunia). Penelitian ini menggunakan data citra dan reanalisis penginderaan jauh dari Satelit Himawari-8. Data yang diperoleh diolah dengan menggunakan software SATAID dan GRADS. Data kemudian disajikan dalam bentuk grafik/time series, tabel, dan peta spasial. Hasil data berupa grafik/time series dan peta suhu puncak awan menunjukkan bahwa terjadi penurunan suhu awan ≤-50oC sehingga membentuk awan-awan konvektif berupa awan Cumulonimbus dimulai dari pukul 05.50 UTC (12.50 WIB) hingga meluruh pukul 10.30 UTC (17.30 WIB). Hasil data indeks stabilitas atmosfer di lokasi kejadian menunjukkan bahwa terjadi ketidakstabilan atmosfer sebelum terjadinya hujan lebat. Hal ini menjadi pendorong dalam mempercepat pertumbuhan awan-awan Cumulonimbus (Cb). Peta streamline angin dan vortisitas memperlihatkan bahwa terjadi pertemuan massa udara dari arah yang berbeda dan pembentukan sirkulasi aliran fluida angin siklonik sehingga menimbulkan konvergensi saat terjadinya hujan lebat.Kata kunci: Hujan Lebat, Himawari-8, SATAID, Awan Konvektif ABSTRACTHeavy rain occurred in Kuta limbbaru village, Kutalimbaru sub-district, Deli Serdang, North Sumatra on July 26, 2020 at 09.00 UTC (16.00 WIB). Based on the website of the Badan Nasional Penanggulangan Bencana (BNPB), this incident swept away 9 people (8 found and 1 person died). This study uses image data and remote sensing reanalysis from the Himawari-8 Satellite. The data obtained were processed using SATAID and GRADS software. The data is then presented in the form of graphs/time series, tables, and spatial maps. The data results in the form of graphs/time series and cloud top temperature maps show that there is a decrease in temperature of ≤-50oC so as to form convective clouds in the form of Cumulonimbus clouds starting at 05.50 UTC (12.50 WIB) until decaying at 10.30 UTC (17.30 WIB). The results of the occurrence of atmospheric index data at the location of the incident indicate that the instability of the atmosphere before heavy rains. This is the driving force for the growth of Cumulonimbus (Cb) clouds. Wind streamline maps and vortices show that the meeting of air masses from different directions and the formation of cyclonic wind fluid flow circulation, causing convergence during heavy rains.Keywords: Heavy Rain, Himawri-8, SATAID, Convective Cloud

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