C Cari, C
Theoretical Physics Group, Physics Department of Postgraduate Program, Sebelas Maret University, Indonesia

Published : 20 Documents
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Journal : Journal of Physics: Theories and Applications

A model of nonlinear DNA-protein interaction system with Cornell potential and its stability Syahroni, Edy; Suparmi, A; Cari, C; Anwar, Fuad
Journal of Physics: Theories and Applications Vol 1, No 1 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.749 KB) | DOI: 10.20961/jphystheor-appl.v1i1.4716

Abstract

The purpose of this study was to determine the model of a interaction system between the DNA with protein. The interaction system consisted of a molecule of protein bound with a single chain of DNA. The interaction between DNA chain, especially adenine and thymine, and DNA-protein bound to glutamine and adenine. The forms of these bonds are adapted from the hydrogen bonds. The Cornell potential was used to describe both of the interactions. We proposed the Hamiltonian equation to describe the general model of interaction. Interaction system is divided into three parts. The interaction model is satisfied when a protein molecule triggers pulses on a DNA chain. An initial shift in position of protein xm should trigger the shift in position of DNA ym, or alter the state. However, an initial shift in DNA, yn, should not alter the state of a rest protein (i.e. xm = 0), otherwise, the protein would not steadily bind. We also investigated the stability of the model from the DNA-protein interaction with Lyapunov function. The stability of system can be determined when we obtained the equilibrium point.
Student's Conception about Friction Force Direction in Physics Education Sebelas Maret University Wulandari, Puspita Septim; Cari, C; Aminah, Nonoh Siti
Journal of Physics: Theories and Applications Vol 1, No 2 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1928.415 KB) | DOI: 10.20961/jphystheor-appl.v1i2.19122

Abstract

The student's conception of friction force direction on objects is different. Student’s conceptions are important to improve the next learning process. The aim to the research was to know student’s conception about friction force direction. This research was a qualitative descriptive. Samples consisted of  33 students from Physics Education UNS semester 1 who have not obtained the material friction in the lecture. Data collected through test and intervie. Data were analyzed by reduction, presentation, conclusion and verification. Based on the result of student conception showed the average of 82,82% student can describe the direction of friction force on objects with translational motion, 18,18% student can describe the direction of friction force on objects with translational and rotation motion inclane and all students can not describe the direction of friction force on bicycle wheels.
Fabrication of dye natural as a photosensitizers in dye-sensitized solar cells (DSSC) Hardani, Hardani; Hendra, Hendra; Darmawan, Muh. Iman; Cari, C; Supriyanto, Agus
Journal of Physics: Theories and Applications Vol 1, No 1 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (672.574 KB) | DOI: 10.20961/jphystheor-appl.v1i1.4704

Abstract

The purpose of this study was to obtain optical properties (absorption spectrum) and electrical properties (photoconductivity) of organic dyes in DSSC performance. optical and electrical properties were tested by using UV-Visible Spectrophotometer and Elkahfi 1601 PC 100 / IV meter, respectively, while Keithley Type 2600A is used for the characterization of DSSC. This study is a great base to explore and investigate the development of DSSC solar cells using natural dyes (organic). Spectra optimal absorption and photoconductivity produced by natural dyes (organic). The results of this study indicate that the absorption spectrum of natural dyes (organic) in the range of 300-500 nm. electrical characteristics (I-V) of the increase in linear dye under illumination. I-V characteristics of DSSC from organically produced natural dyes to color the biggest-mangosteen obtained Voc of 565 mV; JSC = 1.52 A / m2; FF = 0.12; and η_ef is approximately 0.09%, respectively,. The conclusion of this study, natural dyes (organic) can be an attractive alternative as a dye.
COMPARISON OF THE SUPERCONDUCTING RECTANGULAR CRITICAL FIELDS WITH THE SAME AREA AT κ = 1.5 Anwar, Fuad; Cari, C; Ilmi, Alqaan Maqbullah
Journal of Physics: Theories and Applications Vol 3, No 2 (2019): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (760.65 KB) | DOI: 10.20961/jphystheor-appl.v3i2.38112

Abstract

The Time Dependent Ginzburg-Landau (TDGL) equation can be used to study the characteristics of superconductors in the evolution of time to reach equilibrium. This study uses the ?U method to numerically calculate critical field values more easily. Previous research has been carried out on size variations, kappa variations, proximity effects and so on. In this study, a comparison between squares and rectangles with the same size of area for type II superconductor , then it is found that the critical field Hc3 is the same value for each of the same area.
Local Site Effects Evaluation Using Microtremor Measurements at North Side of Pandan Mountain Hidayat, Samsul; Warnana, Dwa Desa; Koesuma, Sorja; Cari, C
Journal of Physics: Theories and Applications Vol 1, No 2 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1783.806 KB) | DOI: 10.20961/jphystheor-appl.v1i2.19120

Abstract

Disaster mitigation has been undertaken to reduce the impact of loss or damage caused by the earthquake. For disaster mitigation purpose, it is necessary to conduct a local geological assessment. The horizontal to vertical spectral ratio (HVSR) of microtremor analysis is very popular in the context of seismic micro-zonation. Microtremor method is cheap, data acquisition is easy, and does not cause noise, so suitable for use in residential areas. This research aims to determine the distribution of the natural frequency value, the amplification factor value, and the soil vulnerability index value. This study was conducted geographically between 7°26'17.45" – 7°26'53.16" S and 111°47'14.76" – 111°48'7.06" E. Data processing using HVSR analysis method on Easy HVSR software. The results showed that the natural frequency (fo) values range 0,95 Hz to 8,3 Hz and the amplification factor values range 2,05 to 8,67. From the result data of the natural frequency and the amplification factor, the soil vulnerability index can be calculated. The vulnerability index (Kg) value ranges from 1,09 to 68,33. The northeast side of the study area is indicated as a weak zone where have high potential to damage when the earthquake occurred.
Time Variation of Insertion Cu On TiO2 Nanoparticles Layer Through The Electroplating Method In Dye-Sensitized Solar Cell (DSSC) Obina, Wilfrida M; Supriyanto, Agus; Cari, C; Sumardiasih, Sri; Septiawan, Trio Y.
Journal of Physics: Theories and Applications Vol 1, No 2 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1618.768 KB) | DOI: 10.20961/jphystheor-appl.v1i2.19312

Abstract

Copper (Cu) is a conductive metal. Insertion of copper on a TiO2 active layer is the right choice in the effort to improve Dye-Sensitized Solar Cell (DSSC) performance. Electroplating methods were used in this study to insert copper in the TiO2 layer. The device of DSSC used in this study is natural dye Moringa Oleifera, TiO2-Cu electrode, the counter electrode of Pt and electrolyte from NaI. The peak absorbance of dye is at wavelength 415 nm and maximum efficiency is 0,093% from the time variation electroplating of 25 s. There is increase efficiency from TiO2 to TiO2-Cu electrode with time variation of electroplating. It is shown that insertion of copper in the TiO2 nanoparticles layer improves the performance of DSSC.
Fabrication of dye Rhoeospathacea with concentration variation in dye-sensitized solar cells (DSSC) Sumardiasih, Sri; Supriyanto, Agus; Cari, C
Journal of Physics: Theories and Applications Vol 1, No 1 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (634.95 KB) | DOI: 10.20961/jphystheor-appl.v1i1.4722

Abstract

Dye-sensitized solar cell (DSSC) is a device that directly converts visible light into electrical energy. In this work we used dye was extracted from Rhoeo spathacea. A natural dye was directly mixed with TiO2 anatase to obtain dyed titanium dioxide which can be used as photoanode for DSSC by varying the volume of dye. The first variation is 2 ml dye mixed with 1 ml of TiO2, and the second variation is 3 ml dye mixed with 1 ml of TiO2. The absorbance spectra of the dye and dye titanium dioxide have been investigated by spectroscopy UV-Visible Lambda 25 and the conversion efficiency of dye titanium dioxide used Keithley 2602A meter. The DSSC based on dye titanium dioxide with varying volume of dye showed that the efficiency of the the second variation is 0,033% which is higher than the first variation (0,023%) as obtained from I-V characterization. 
Analytical solution of energy eigen value, eigen function and angular wave function of Dirac equation with Rosen Morse plus Rosen Morse potential in terms of Romanovski polynomials for exact spin symmetry Prasetyaningrum, Ihtiari; Cari, C; Suparmi, A
Journal of Physics: Theories and Applications Vol 1, No 1 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1041.439 KB) | DOI: 10.20961/jphystheor-appl.v1i1.4700

Abstract

The energy eigenvalues and eigenfunctions of Dirac equation for Rosen Morse plus Rosen Morse potential are investigated numerically in terms of finite Romanovsky Polynomial. The bound state energy eigenvalues are given in a closed form and corresponding eigenfunctions are obtained in terms of Romanovski polynomials. The energi eigen value is solved by numerical method with Matlab 2011.
Analytical solution of Klein Gordon equation Trigonometric Pӧschl-Teller potential using asymptotic iteration method Nugraha, Dewanta Arya; Suparmi, A; Cari, C
Journal of Physics: Theories and Applications Vol 1, No 1 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.85 KB) | DOI: 10.20961/jphystheor-appl.v1i1.4710

Abstract

Radial part of Klein Gordon equation for trigonometric Pӧschl-Teller potential was obtained within framework of a centrifugal term approximation. The relativistic energy spectrum and wave functions was obtain by using asymptotic iteration method. The value of relativistic energy was calculated numerically using Matlab 2013. The results showed that the relativistic energy is increasing due to the increase of potential constant and quantum number.
Solution of Five-dimensional Schrodinger equation for Kratzer’s potential and trigonometric tangent squared potential with asymptotic iteration method (AIM) Prakoso, Agung Budi; Suparmi, A; Cari, C
Journal of Physics: Theories and Applications Vol 1, No 2 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1944.857 KB) | DOI: 10.20961/jphystheor-appl.v1i2.19126

Abstract

Non-relativistic bound-energy of diatomic molecules determined by non-central potentials in five dimensional solution using AIM. Potential in five dimensional space consist of Kratzer’s potential for radial part and Tangent squared potential for angular part. By varying nr, n1, n2, n3, dan n4 quantum number on CO, NO, dan I2 diatomic molecules affect bounding energy values. It knows from its numerical data.