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Omega: Jurnal Fisika dan Pendidikan Fisika
Published by Universitas Muhammadiyah Prof. Dr. Hamka
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education,
Education Physics
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue " Vol 4 No 1 (2018)" : 5 Documents clear
Simulating the Aerodynamics Profiles of NACA 4312 Airfoil in Various Incoming Airspeed and Gurney Flap Angle Sumaryada, Tony; Jaya, Achmad Muharam; Kartono, Agus
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 4 No 1 (2018)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v4i1.1

Abstract

Simulations of the aerodynamics performance of NACA 4312 airfoil at various gurney flap angles and incoming airspeed (wind velocities) have been conducted. The gurney flaps size was set at 5.0% length of the chord line. Two airfoil models with gurney flap at 45° and 90° were simulated and compared with the results of plain airfoil (without gurney flap) model with the incoming airspeed of 10.0 m/s, 70.0 m/s and 200.0 m/s. The results have shown that increasing the value of gurney flap angle to 45° and 90° will increase the lifting force of the airfoil and decrease the drag force.
Approximation in Quantum Quadrupole at Juergen Model for Nuclear Reactor Control Rod Blade Based on ce {Th_xDUO2} Nano Materials Hardiyanto, Moh.
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 4 No 1 (2018)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v4i1.7

Abstract

The functional of a multi purpose research nuclear reactor control rod blade nuclear reactor is stabilized and controlling devices for nuclear chain reactions, the existing of Cerenkovs radiation impact and thermal neutron flux in reactor chamber. This research was conducted in Large Hadron Collider (LHC) - Muon Hadron Division at CERN, Lyon - France under International Research between Canadian Deuterium Uranium (CANDU) - Nuclear Reactor and Betha Group Section for sub-particles for nanomaterial. Using Juergen Model with quantum states approaching and testing by Muon-Hadron Stirrer equipment had determined the ce {Th_xDUO2} derivatives materials. This material shown the strength of thermal neutron flux absorbed about 2.56 × 10⁵ − 1.94 × 10⁶ Ci/mm, the value of Electrical Conductivity is 26.62 − 29.98 in 800° - 890° C temperature, however at 2.1 × 10⁵ Ci/mm thermal neutron flux condition is 29.44 − 37.88 in IAEA standard. At 450 tesla magnetic field and 2.1 × 10⁵ Ci/mm thermal neutron absorber, the crystalline structure reduction is 6.88% until 10.95% for 25 years period in 45.7 megawatts with ce {UO2} more enrichment and ce {Pu2O} also ce {Th2O_y} nuclear fuel element matrix.
Ionic Conductivity of Chitosan-based Polymer Electrolyte with Polyethylene Glycol (PEG) as Plasticizer and KCl as Alkaline Ion Transport Source Maddu, Akhiruddin; Kadapi, Muhamar; Sofian, Irmansyah
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 4 No 1 (2018)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v4i1.13

Abstract

Polymer electrolyte films were fabricated utilizing chitosan biopolymer plasticized with polyethylene glycol (PEG) and KCl addition as ionic transport source. The precursor solution was prepared by mixing the chitosan in acetic acid solution and PEG that act as a plasticizer. Into the mixed solution was added KCl salt for as alkalin ion transport source in the polymer electrolyte. The polymer electrolyte films were fabricated by the casting method onto the petri glass. The influence of KCl content on ionic conductivity of the composite polymer electrolyte film was studied. The ionic conductivity of the composite polymer electrolyte film was characterized using LCR meter at a frequency of 1 kHz. The best ionic conductivity was found for the film containing 45 wt% of KCl salt. The activation energy was determined by using Arrhenius plot based on conductivity data at varied temperature. It has been found that the activation energy of the composite polymer electrolyte films varied to the KCL content in the composite polymer electrolyte films. The highest activation energy was found for the polymer electrolyte film with 45 wt% of KCl content.
Synthesis and Optical Characterization of Carbon Dot from Peels of Dragon Fruit and Pear Hepriyadi, Selvy Uftovia; Isnaeni, .
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 4 No 1 (2018)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v4i1.19

Abstract

Fluorescence materials such as carbon dots are unique and non-toxic materials that can be produced using many methods. In this research, synthesis and optical characterization of carbon dots from the peels of dragon fruit and pear have been done. The synthesis uses bottom-up method using microwave with 20 minutes, 40 minutes, and 80 minutes of heating time. The result of optical characterizations showed that the samples that have been heat treated are carbon dots based of the absorbance in the range of 280-350 nm, and the intensity are decreased in the range of visible and infrared wavelength. There are emission and intensity changes by different heat treatments. From the samples of dragon fruits peels, the emission wavelength tended to shift toward visible light at the wavelength of 551.51 nm, 507.98 nm and 487.28 nm with the excitation at the wavelength of 420 nm from pulsed pico-laser. While, the emission wavelength from the samples of pears peels were fluctuate in wavelength of 529.09 nm, 507.52 nm and 519.46 nm. Similarly, the time-resolved photoluminescence characterization test showed that there were time changes in each sample of carbon dot. The decay lifetime of carbon dots was fluctuated between 4.5 ns - 5.4 ns for dragon fruit’s peels and about 1.9 ns - 2.4 ns for pears peels.
Analysis of Quality Tests Created by FKIP-UHAMKA Faculty for Middle Semester in Academic Year 2016-2017 Astuti, Sri; Kusdiwelirawan, Acep; Dahlia, Siti
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 4 No 1 (2018)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v4i1.24

Abstract

This research is to analyse the quality of test for midterm examination Academic Year 2016-2017 of FKIP UHAMKA lectures. The aims of the research were to identify the quality of the test on compulsory institutional courses academic year 2016-2017 and to analyse the weakness point of the lectures in the making of quality test based on the analysis of the test for midterm examination academic year 2016-2017. The method that used in this research was descriptive analysis method through documentation as a data collection technique. Subjects of this research were semester plan document (RPS) and items test were arranged by lectures. The data that will be analysed are consist of 6 courses, including essay and multiple choice questions. The object of the research was the quality of the items test considered by a few aspects that were learning achievement of RPS, substance of items test, items test structure, and culture/grammar. The instrument for data collection were rubric and researcher which were as human instrument. Overall, the result of this research was the items test have quality with level moderate to good. Furthermore, the majority of items test have weakness related to the making of items test which were the decription of indicators: the learning achievements (such as attitude, general and particular skills) and score list on the items test.

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