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INDONESIA
INDONESIAN JOURNAL OF APPLIED PHYSICS
Published by Universitas Sebelas Maret
ISSN : 20890133     EISSN : 24776416     DOI : -
Core Subject : Science,
Astronomy Energy Materials Science & Nanotechnology Physics
Indonesia Journal of Apllied Physics provides rapid publication of short reports and important research in all fields of physics. Indonesia Journal of Apllied Physics publishes articles that are of significance in their respective fields whilst also contributing to the disclipline of physics as a whole. Articles should be submitted to the Editorial Office of Indonesia Journal of Apllied Physics through this site. Further information on submission is also available at this site
Arjuna Subject : -
Articles 239 Documents
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Aplikasi Thermochromic Liquid Crystal Untuk Mengamati Perpindahan Kalor Pada Permukaan Logam Suryantari, Risti; Flaviana, Flaviana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 1 (2017): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i1.2292

Abstract

Tujuan penelitian ini adalah untuk mengamati peristiwa perpindahan kalor pada area permukaan logam yang bersentuhan dengan permukaan lembaran Thermochromic Liquid Crystal (TLC) R30C5W, melalui citra permukaan TLC selama proses pemanasan logam. Logam dipanaskan dengan pemanas celup, sehingga kalor akan terdistribusi hingga mencapai permukaan logam. Apabila permukaan logam tersebut bersentuhan dengan permukaan TLC, maka kalor akan berpindah dari permukaan logam ke permukaan TLC, dan ditunjukkan dengan terjadinya perubahan warna pada permukaan TLC. Citra asli yang diperoleh dalam bentuk RGB dikonversi menjadi HSV (hue, saturation, value), lalu diambil komponen hue saja, dan kemudian citra hue diproses menggunakan Matlab2014a untuk mendapatkan citra yang lebih baik. Hasil menunjukkan, seiring dengan meningkatnya temperatur permukaan logam, nilai mean hue semakin meningkat. Selain itu, nilai hue sepanjang garis tengah lingkaran pada permukaan TLC, cukup merata di bagian tengahnya (lingkaran dalam) namun semakin berkurang di tepinya (tepi kanan dan kiri), yang menunjukkan semakin jauh dari tepi permukaan logam maka energi kalornya semakin berkurang, karena terjadi perpindahan kalor pada tepi permukaan logam ke udara di sekitarnya. Kata kunci: Thermochromic Liquid Crystal (TLC), hue, perpindahan kalor.
Pemodelan Tsunami Sederhana dengan Menggunakan Persamaan Differensial Parsial Palupi, Indriati Retno; Raharjo, Wiji; Wibowo, Eko; Hamdalah, Hafiz
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 1 (2018): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v8i1.16284

Abstract

One way to solve fluid dynamics problem is using partial differential equation. By using Taylor expansion, fluid dynamics can be applied simply. For the example is tsunami wave. It is include to hyperbolic partial differential equation, tsunami wave propagation can describe in space and time function by using Euler FTCS (Forward Time Central Space) formula.
Sintering Temperature Effect to the Synthesis of SiC Produced from Rice Husk ash and 2B Graphite Pencils Irfanita, Resky; Ansar, Asnaeni; Pratiwi, Ayu Hardianti; J, Jasruddin; S, Subaer
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 01 (2015): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i01.258

Abstract

The objective of this study is to investigate the effect of sintering temperature on the synthesis of SiC produced from rice husk ash (RHA) and 2B graphite pencils. The SiC was synthesized by using solid state reaction method sintered at temperatures of 750°C, 1000°C and 1200°C for 26 hours, 11.5 hours and 11.5 hours, respectively. The quantity and crystallinity level of SiC phase were measured by means of Rigaku MiniFlexII X-Ray Diffraction (XRD). The microstructure of SiC was examined by using Tescan Vega3SB Scanning Electron Microscopy (SEM). The XRD results showed that the concentration (wt%) of SiC phase increases with the increasing of sintering temperature. SEM results showed that the crystallinity level of SiC crystal is improving as the sintering temperature increases
Development of Web Based Learning Material in Physics Subject for Kalor and Temperature Material Kurniawan, Fatwa Aji; S, Sulhadi; Yulianto, Agus
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 02 (2015): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i02.292

Abstract

It has been done, the research which aims to develop a web-based teaching materials on the subjects of physics subject with subject mater of temperature and heat. This study using a modified model of the 4D development by eliminating the deployment phase. The validation of product development conducted by validator media experts and experts matter of physics, whereas small-scale trials conducted by physics teacher and 10 students. Validator review results stating that the quality of the product development were included in the category very well with the average percentage rating of 83.93%. The percentage value assigned by media expert by 75% in the good category and the percentage of the value provided by a matter expert 92.85% were in the very good category. Experiments by physics teacher to obtain result of equal to 94.44% were in the very good category and the average percentage of the test results by the students of 90.5% were in the very good category. The characteristics of the products developed include material composition using the curriculum in 2013, there was a recording facility and the results of evaluation of students' activities, there were feedback evaluation results were immediately known by the students and there were some links related to the material either youtube or other learning website.
Phase Composition and Magnetic Behaviour of Iron Sand from Syiah Kuala Beach Prepared by Mechanical Alloying Jalil, Zulkarnain; Sari, Eva Novita; B, Ismail A; Handoko, Erfan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1180

Abstract

It has recently been investigated that ball milling can improve the magnetic properties of natural iron sand significantly. In this work, we present the phase composition and magnetic behavior of iron sand from Syiah Kuala Beach, Banda Aceh. Samples were prepared by mechanical alloying method using a Fritsch planetary ball mill for 20 hours. As the results, it was shown by XRD testthat Fe3O4 (magnetite) appears as the majority phase and the magnetic properties observation shown that the magnetization saturation (Ms) and remanent (Br) was decreased with the increasing of the coercivity (Hc).
Structural Analysis of Nanoceria Powder Precipitated in Different pH Nurhasanah, Iis; Puspaningrum, Nurul Wahyu; Nursati, Ida
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 02 (2013): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i02.1252

Abstract

Nanoceria has been proposed as inorganic material for sunscreen product because of its excellent UV absorpsition ability. Fine particle nanoceria and non-aglomeration determines comport and covering capability on human skin. Particle size and aglomeration could be controlled by parameters and medium synthesis. In the present work, nanoceria powders were synthesized using precipitation method in different pH of 7 and 10. Precipitation was cariedout in water/isopropanol mixed solvent. Cerium nitrate and amonium hydroxide was used as source of cerium and precipitation agent, respectively. Crystal structure of nanoceria was examined using x-ray diffraction (XRD). Scanning electron microscope (SEM) was used to observe morphology of nanoceria. Diffraction pattern analysis shows that the precipitates were single phase of nanoceria with cubic fluorite structure and lattice contants of 0.5429 nmand 0.5419 nm. Crystallite size and lattice strain were obtained from Williamson-Hall method. Precipitation in pH of 7 resulted in smaller crystallite size which correlated to the larger lattice strain and lattice constant. SEM image shows spherical morphology with less agglomeration occuring for nanoceria precipitated in pH 10.
Pembuatan Beton dengan Campuran Limbah Plastik dan Karakterisasinya Rismayasari, Yessi; U, Utari; Santosa, Usman
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 2, No 02 (2012): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v2i02.1284

Abstract

Research on concrete containing plastic waste as an alternative polymer material has been conducted.It studied the concrete characteristic through compressive strength, impact testing, thermal conductivity, and density testing. Plastic waste used for concrete manufacture was black because it is strong but light. The goal of this research is to determine the characteristics value of concrete with and without plastic waste mixing. Concrete was mixed with the ratio of 1cement: 2 sands: 3 gravel and cement water factor of 0.5. The addition of plastic waste were 0%, 2%, 4%, 6%, 8%, 10% of cement mass.Specimens used was (15x15x15) cm cube with sides for compressive strength testing, (8x2x2) cm a block with the size of for impact testing, acylinder with a diameter of 4cm and thickness respectively 0.2 cm and 0.4 cm for thermal conductivity testing, and a sides (15 x 15 x 15)cm cube with for density testing. The diameter of plastic waste was 0.1 to 0.8 cm. The test was performed at 28 days of concrete age. The result showed that the addition of 4% of plastic waste recorded the best compressive strength, impact testing, and thermal conductivity. In this research, the density was of the range (16 ± 6)x 102 kg / m³up to(22 ± 4) x 102 kg / m³, compressive strength(21.8 ± 0.2) x 106 N / m² of the range (16 ± 0.1) x 106 N / m²to(21.8 ± 0.2) x 106 N / m², impact (8.7 ± 0.3)x 10-1Joule to the range (3.5 ± 0.3)x 10-1Joules up to (8.7 ± 0.3)x 10-1Joule and thermal conductivity (6.0 ± 0.5) x 10 -5 kcal / ms °C was (1.17 ± 0.5) x 10-5 kcal / ms °C to (6.0 ± 0.5) x 10 -5 kcal / ms °C.
Electromagnetics Properties of Non-Relativistic Deuteron in Ground State Sari, R. Yosi Aprian; Darmawan, Denny
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i01.1802

Abstract

Proton-neutron interaction that makes up deuteron is a mixture state of ?13 dan ?13, which are each associated with a state ?=0, ?=1 and ?=2, ?=1. In the proton-neutron interaction, there are particle exchanges of medium range (1 fm≤?≤2 fm) i.e. scalar meson exchange and the long range (?>2 fm) i.e. one pion exchange. The electromagnetic properties of non-relativistic deuteron in the ground state can be found from the coupled differential equation, such as magnetic dipole moment, 〈?D〉=0.856521?? and electrical quadrupole moment, 〈?D〉=0.00291396 b.
Identifikasi Bidang Gelincir di Dusun Dukuh, Desa Koripan, Kecamatan Matesih, Kabupaten Karanganyar, Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner Alfa Romadon, Irwan; D, Darsono; Koesuma, Sorja
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 02 (2016): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i02.1892

Abstract

Slip surface identification in Dukuh, Koripan Village, Matesih Sub-district, Karanganyar District has been conducted with geoelectrical resistivity method with Wenner Alfa configuration. Data acquisitions was done on 5 sample lines. The length of each line is 75 meter. The smallest electrode spacing’s 3 meter, with multiplier (n) between 1 to 5. Two dimensional results show that slip surface in every sample lines formed by watertight wet clays material, with resistivity 8,99 Ωm until 13,4 Ωm. The depth of the slip surface in each line is varies. Slip surface of the line 1 was found at a depth of 1 meter to 3,7 meter, the line 2 was found at 2 meter to 4 meter, the line 3 was found at 0,75 meter to 3,78 meter, the line 4 was found at 1,5 meter to 3,5 meter, and the slip surface of line 5 was found at 0,75 meter to 3 meter. Three dimenisonal result show that the area with high land movement was covered by sandy-clay materials.
Pencitraan 3D Data Geolistrik Resistivitas dengan Rockworks Berdasarkan Hasil Inversi Res2DInv untuk Mengetahui Persebaran Batuan Konglomerat di Desa Surodadi, Kecamatan Gringsing, Kabupaten Batang Fitrianto, Taufik Nur; Supriyadi, Supriyadi; Mukromin, Teguh Maulana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.13952

Abstract

Research was conducted to determine distribution of Conglomerate in Surodadi Village, Gringsing, Batang. The data acquisition used Schlumberger array. The length of line is 165 m and 15 m electrode spacing. The data processing used Microsoft Excel and 2D imaging used Res2Dinv. Then 3D imaging used Rockworks from result of Res2DInv inversion. The position data was used on UTM coordinate from position data each of electrode. The data acquisition was done at two parallel lines. In this area was found two types of rocks; tuffaceous sandstone and conglomerate. The conglomerate with resistivity values higher than 180 Wm is distribution on southeast research area at the depth 5 m – 25 m. While the tuffaceous sandstone layers is distribution on northwest research area.

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