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All Journal Jurnal Ilmu Dasar POSITRON Journal of Mathematical and Fundamental Sciences Jurnal Fisika FLUX Momentum: Physics Education Journal Indonesian Journal of Physics (IJP) Jurnal Sains Materi Indonesia
Sutisna Sutisna
Jurusan Fisika FMIPA Universitas Jember
Astronomy Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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Sistem Pengukur Suhu Simultan untuk Aplikasi Pemantauan Suhu Tubuh Pasien di Rumah Sakit Sutisna Sutisna; Misto Misto; Hardianto Hardianto
Jurnal Fisika FLUX Vol 7, No 1 (2010): Jurnal Fisika Flux Edisi Februari 2010
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (812.298 KB) | DOI: 10.20527/flux.v7i1.3071

Abstract

An electronic monitoring system has been created for monitoringpatients condition simultaneously. The temperature was converted to the voltageby a temperature sensor consisting of an NTC (negative temperature coefficient)thermistor and the additional circuit that its output voltage change following thechange of thermistor resistance. The number of temperature sensor circuit isused as much as ten. The coverage of temperature measurements were in therange 35oC to 41oC. The main control system was done by Labjack UE9 workingbased program that created in LabVIEW 8.0 software. The result showed that thesystem works well, seen from the accuracy value reached more than 99%(discrepancy (D) less than 0.6%) and precision levels obtained from three timesretrieval of data also amounts to more than 99% (relative uncertainty (I) less than0.6%).
Perumusan Fungsi Green Sistem Osilator Harmonik dengan Menggunakan Metode Integral Lintasan (Path Integral) Sutisna Sutisna
Jurnal Fisika FLUX Vol 6, No 1 (2009): Jurnal Fisika Flux Edisi Februari 2009
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (490.516 KB) | DOI: 10.20527/flux.v6i1.3050

Abstract

The path integral is a method that often used in the quantum problemscalculation. For example; the calculation of quantum system energy that hascomplex potential form. The method gives more easily than perturbation method.The method is also used to derive Green function, which usually used Fouriertransformation. The Green function has widely application in quantum physics,since it used to compute solution of inhomogen differential equation asSchrodinger equation. In the particle physics, the Green function used aspropagator in Feynman’s diagram. Considering the importance of Green function,and the powerfull of path integral method, in the paper, the method used toderive the formula of Green function for quantum harmonic oscillator system. Thesystem has widely application to give more information of physical phenomena,for example, the atomic vibration in solid state. The result was also comparedwith Fourier transformation method and both give the same result as hoped.
Analytical Solution of Schrödinger Equation of the Harmonic Oscillator System with Position Dependent Mass Using Transformation Method Tis Sutisna
Jurnal ILMU DASAR Vol 10 No 2 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.945 KB)

Abstract

The Schrodinger equation with position-dependent mass (PDM) becomes one of interesting subjects in the study of quantum systems, because of its wide applications in many physical problems. Meanwhile, harmonic oscillator becomes important model in most physical problems. In this paper, analytical solutions of the PDM Schrodinger equation, i.e. energy eigenvalues En and eigenfunctions , of a one dimensional harmonic oscillator system using transformation method has been studied. The results showed that there was no difference between the energy eigenvalues, En of the harmonic oscillator systems with and without PDM, whereas it is not for the eigenfunctions,  of these two harmonic oscillator systems. This difference was due to the presence of dimensionless mass function  and the changes of x becomes  variable for the eigenfunctions of the harmonic oscillator system with PDM.  Moreover, the differences in the eigenfunctions will affect the dynamical properties of the quantum systems. It can be concluded that the harmonic oscillator system with PDM is the generalization of the harmonic oscillator system with constant mass.
Development of a Low-Cost TiO2/CuO/Cu Solar Cell by using Combined Spraying and Electroplating Method Mamat Rokhmat; Edi Wibowo; Sutisna Sutisna; Khairurrijal Khairurrijal; Mikrajuddin Abdullah
Journal of Mathematical and Fundamental Sciences Vol. 50 No. 1 (2018)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2018.50.1.8

Abstract

A simple method is proposed to develop a low-cost TiO2/CuO/Cu based solar cell. The cell is made by employing a lower grade (technical grade) of TiO2 as the active material. CuO powder is synthesized using a wet chemical method and mixed with TiO2 powder to give impurity to the TiO2. A layer of TiO2/CuO is then deposited onto fluorin-doped tin oxide (FTO) by spraying. Copper particles are grown on the spaces between the TiO2 and/or CuO particles by electroplating for more feasible electron migration. The TiO2/CuO/Cu solar cell is finalized by sandwiching a polymer electrolyte between the film and the counter electrode. Current-voltage measurement was performed for various parameters, such as the molarity of NaOH for producing CuO particles, the weight ratio of CuO over TiO2, and the current in the electroplating process. A highest efficiency of 1.40% and a fill factor of 0.37 were achieved by using this combined spray and electroplating method.
Identitas Nielsen Triyanta Triyanta; Sutisna Sutisna
Indonesian Journal of Physics Vol 12 No 4 (2001): Vol. 12 No.4, Oktober 2001
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (72.879 KB)

Abstract

The gauge dependence of the effective action Γ that has been known for quite a long time is shown by a differential equation called the Nielsen identity. The identities appear in quantum field theory as due to the invariance of the Lagrange density with respect to the extended BRST transformations. In this paper the identities, both for the case of QED and QCD, will be derived in some gauge choices, first by following a method found in the references and second by a proposed method.
Misconceptions on the understanding of flying objects in fluids Edy Wibowo; Naily Ulya; Whibatsu Helvantriyudo; Muhammad Maliki Azyumardi; Fata Hafiduddin; Mamat Rokhmat; Ismudiati Puri Handayani; Abrar Abrar; Nurwulan Fitriyanti; Sutisna Sutisna; Amira Saryati Ameruddin
Momentum: Physics Education Journal Vol. 7 No. 2 (2023)
Publisher : Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/mpej.v7i2.6881

Abstract

The concepts of floating, flying, and sinking object have been studied since junior high school. However, we still often find students' misconceptions regarding the concept, especially of flying objects, even at the university level. This work aims to propose a clarification of the concept of a flying object in the fluid to be correctly described the condition for the flying object. We used eggs, water, and salt solutions to demonstrate sinking, rising, and floating objects in the fluids. The results showed that when the density of the object is the same as the density of the fluid, the position of the object is still at the bottom of the fluid since it was not flying in the middle of the depth of the fluid. But the object does not touch the bottom of the container so that the object's height is zero. This is because the object has not had a driving force (Fd = 0) that pushes the object upward towards the surface of the fluid to float. When the density of the fluid slightly exceeds the density of the object, the object immediately moves upward to the fluid surface - floating phenomenon is started. The greater the difference between the density of the fluid and the density of the object, the faster the object moves towards the surface. The object cannot stay at any position between the bottom and the surface of the fluid. A stable position is reached when the object reaches the surface of the fluid to float. This work is expected to increase students' understanding of flying objects in fluids.
One Step Synthesis of TiO2-Activated Carbon Composite Using Hydrothermal Method with Mass Variation of Activated Carbon Sutisna, Sutisna; Rokhmawati, Ilma Eka Nur; Misto, Misto; Rofi’i, Imam; Mulyono, Tri; Siswanto, Siswanto; Supriyanto, Edy; Wibowo, Edy
POSITRON Vol 13, No 1 (2023): Vol. 13 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v13i1.59856

Abstract

One effort to increase the photocatalytic activity of TiO2 is to immobilize it on the surface of the sorbent material. This study aims to produce TiO2-Activated Carbon (TiO2-AC) composites which have higher photocatalytic activity than TiO2, using a simple method. The synthesis of TiO2-AC  composites was carried out using the hydrothermal method. The synthesis process was initiated by mixing TTIP, ethanol, H2O, and activated carbon with various masses (5 g, 10 g, 15 g, and 20 g). The mixture was then put into a hydrothermal autoclave and heated at 180°C for 12 hours. The material is then washed until the pH is neutral, and then dried. The TiO2-AC composite powder was then calcined at 500°C for 3 hours. Based on the photocatalytic test of the TiO2-AC composite on the degradation of methylene blue compounds, it was shown that composite with a mass variation of 10 g activated carbon (TiO2-AC/10) had the highest photocatalytic activity. FTIR characterization of the sample TiO2-AC/10 showed a shift in the peak wave number of the hydroxyl and carbon groups. Meanwhile, the results of morphological analysis using SEM showed that TiO2 particles had adhered to the AC surface, which was also confirmed by EDX data in the presence of Ti and O elements in the synthesized material. The results of the crystallinity analysis showed that the 100% synthesized TiO2 was the anatase phase with a crystalline size of 1.80−14.14 nm. This study open up opportunities for the development of TiO2-based composite materials for large-scale environmental remediation applications.
Influence of Hydrothermal Temperature on the Physical Characteristics and Photocatalytics Activity of TiO2 for Degradation of Amoxicillin Sutisna Sutisna; Rija Rizqi Maulana; Wenny Maulina; Sujito Sujito; Nindha Ayu Berlianti; Edy Wibowo
Jurnal Sains Materi Indonesia Vol. 26 No. 1 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.2051

Abstract

Titanium dioxide (TiO2) is a photocatalyst material widely used for environmental remediation applications. In this research, TiO2 material was synthesized using the hydrothermal method at various temperatures (150°C, 180°C, and 200°C). Based on the Fourier-transform infrared (FTIR) data, it was found that all the synthesized materials showed similar absorption peaks, and Ti-O-Ti bonds were detected, which is a characteristic of TiO2. X-ray diffraction (XRD) analysis showed that all the synthesized materials were TiO2 anatase with different crystalline sizes. The synthesized TiO2 using the hydrothermal temperature of 180°C showed the smallest crystalline size of 86.81 nm. Based on the analysis of the band gap energy, it was found that wider band gap energy was obtained at higher hydrothermal temperatures. The band gap energies of the synthesized materials are 3.18 eV, 3.19 eV, and 3.21 eV for hydrothermal temperatures of 150°C, 180°C, and 200°C, respectively. The photocatalytic activity of the three synthesized materials was tested in the photodegradation experiment of amoxicillin under ultraviolet (UV) irradiation. As a result, it was found that TiO2 synthesized at 180°C has the highest photocatalytic activity by degrading 100% of amoxicillin compounds within 120 minutes.
Pemanfaatan Limbah Ampas Kopi sebagai Material Pendukung TiO2 untuk Aplikasi Reduksi Logam Berat Kromium(VI) Sutisna, Sutisna; Yaqin, Moh. Nazib Abdulloh; A'yun, Qurrota; Alfiela, Willda Dian; Ilmiyah, Inayatul; Zakaria, Helmy Adam
POSITRON Vol 14, No 1 (2024): Vol. 14 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i1.72650

Abstract

Pemanfaatan ampas kopi sebagai material pendukung katalis TiO2 tidak hanya berpotensi untuk mengurangi limbah kopi yang belum dimanfaatkan dengan baik, tetapi juga dapat berperan dalam upaya pengolahan limbah logam berat Cr(VI) yang berbahaya. Salah satu cara pengolahan limbah logam berat Cr(VI) adalah dengan mereduksinya menjadi Cr(III) yang relatif lebih aman dan tidak toksik. Penelitian ini bertujuan untuk mengetahui karakteristik morfologi, komposisi unsur, luas permukaan spesifik, dan porositas dari material komposit TiO2-Ampas Kopi (TiO2-AK). Material TiO2-AK disintesis menggunakan metode hidrotermal dengan memvariasikan komposisi massa antara TiO2 dengan AK (1:9, 2:8, 3:7, dan 4:6). Material hasil sintesis dikarakterisasi menggunakan SEM-EDS dan adsorpsi-desorpsi nitrogen. Selain itu, dikaji juga aktivitas fotokatalitik material hasil sintesis dalam mereduksi Cr(VI). Hasil penelitian menunjukkan bahwa TiO2 berhasil menempel pada permukaan ampas kopi. Material komposit TiO2-AK yang disintesis memiliki struktur mesoporous dengan luas permukaan spesifik berkisar antara 23,354 m2/g hingga 30,281 m2/g. Penggunaan adsorben ampas kopi sebagai material pendukung TiO2 membentuk sinergi yang baik antara mekanisme adsorpsi dan fotokatalitik sehingga dapat mereduksi Cr(VI) dengan lebih cepat. Aktivitas fotokatalitik paling tinggi ditunjukkan oleh material TiO2-AK dengan variasi massa 2:8 yang mampu mereduksi Cr(VI) hingga 61,8% dalam waktu 6 jam iradiasi sinar UV.
Co-Authors A'yun, Qurrota Abrar Ismardi Alfiela, Willda Dian Amira Saryati Ameruddin Edi Wibowo Edy Supriyanto Edy Wibowo Fata Hafiduddin Hardianto Hardianto Ilmiyah, Inayatul Ismudiati Puri Handayani Khairurrijal Khairurrijal Mamat Rokhmat Mikrajuddin Abdullah Misto Misto Misto Misto Muhammad Maliki Azyumardi Naily Ulya Nindha Ayu Berlianti Nurwulan Fitriyanti Rija Rizqi Maulana Rofi’i, Imam Rokhmawati, Ilma Eka Nur S Siswanto Sujito Sujito Tri Mulyono Triyanta Triyanta Wenny Maulina, Wenny Whibatsu Helvantriyudo Yaqin, Moh. Nazib Abdulloh Zakaria, Helmy Adam