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

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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 | 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 | 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 | 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.
PENYELESAIAN PERSAMAAN DIRAC UNTUK POTENSIAL ROSENMORSE HIPERBOLIK TERDEFORMASI q DAN POSCHL-TELLER NON-SENTRAL MENGGUNAKAN POLINOMIAL ROMANOVSKI Cari, C; Suparmi, A; Deta, U A; Yulianti, H; Husein, A S
Jurnal Fisika Vol 3, No 1 (2013)
Publisher : Jurnal Fisika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Persamaan Dirac dengan potensial skalar dan vektor yang sama yang merupakan potensial non-sentral hasil kombinasi potensial Rosen-Morse hiperbolik terdeformasi q dengan potensial non-sentral Poschl-Teller diselesaikan dengan polinomial Romanovski. Spektrum energi dan fungsi gelombang relativistik terdeformasi diperoleh dari persamaan Dirac bagian radial sedangkan dari persamaan Dirac bagian sudut polar diperoleh bilangan kuantum orbital terdeformasi dan fungsi gelombang polar relativistik terdeformasi. Spektrum energi relativistik tereduksi menjadi spektrum energi non-relativistik pada batas non-relativistik. Hadirnya potensial Poschl-Teller menyebabkan meningkatnya spektrum energi sistem.
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 | 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 | 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.
Bahan Sasaran Sebagai Sumber Neutron yang Optimal untuk Boron Neutron Capture Therapy (BNCT) Surono, Yan; Cari, C; Sarjono, Yohannes
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2016
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v1i0.4524

Abstract

Abstract Cancer is a deadly disease that exist on planet earth. Efforts were made to be able to kill cancer cells either by manual operation or by radiotherapy. One way to use energy radiation radioactive elements as killers of cancer cells is Boron Neutron Capture Therapy (BNCT). BNCT is a therapeutic technique that utilizes the interaction of neutron capture by the core 10B will produce α-particles and nuclei 7Li results by reaction 10B (n, α) 7Li. It therefore requires a material that will produce neutrons used in BNCT. Materials  target that will be searched in order to obtain optimal materials according to the requirements provided by the International Atomic Agency (IAEA). Keywords : Kanker, Material, Neutron, BNCT Abstrak Kanker adalah salah satu penyakit yang mematikan yang ada di planet bumi. Upaya upaya dilakukan untuk dapat membunuh sel kanker baik itu  secara operasi manual maupun dengan cara radioterapi. Salah satu cara yang memanfaatkan energi radiasi unsur unsur radioaktif sebagai pembunuh sel kanker adalah Boron Neutron Capture Therapy (BNCT). BNCT merupakan teknik terapi yang memanfaatkan interaksi tangkapan neutron oleh inti 10B yang akan menghasilkan partikel-α dan inti hasil 7Li melalui reaksi 10B(n,α) 7Li. Oleh sebab itu diperlukan material yang akan menghasilkan neutron digunakan dalam BNCT. Bahan - bahan sasaran yang akan ditelusur dalam upaya mendapatkan bahan yang optimal sesuai persyaratan yang diberikan oleh International Atomic Agency (IAEA). Kata Kunci : Kanker, Material, Neutron, BNCT
Tingkat Pemahaman Konsep Mahasiswa Pendidikan Fisika Universitas Sebelas Maret pada Materi Momentum Rosa, Geraldin Cintia; Cari, C; Aminah, Nonoh Siti
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2017
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v2i0.16368

Abstract

Abstract: Understanding concepts on the momentum material owned by students is vary. Some students have understood the concept in accordance with scientific truth, but some are not yet. Constraints experienced by students in understanding the concept can lead to misconception. This study aims to analyze the level of understanding of student concepts on the momentum material by using qualitative descriptive method. The subjects of this research are 33 students of Physics Education of Sebelas Maret University who have not received Basic Physics course. Data were collected by tests and interviews. The results showed that 77.27% of students experienced misconceptions on the transfer of energy of mutually colliding objects. Momentum and impulse materials have been taught in the XI Senior High School, though most students have not understood the concept as a whole. Abstrak: Pemahaman konsep pada materi momentum yang dimiliki mahasiswa berbeda-beda. Sebagian mahasiswa sudah memahami konsep sesuai dengan kebenaran ilmiah, namun ada juga yang belum. Kendala yang dialami mahasiswa dalam pemahaman konsep tersebut dapat menimbulkan terjadinya miskonsepsi. Penelitian ini bertujuan untuk menganalisis tingkat pemahaman konsep mahasiswa pada materi momentum dengan menggunakan metode deskriptif kualitatif. Subjek penelitian yang digunakan adalah 33 mahasiswa Semester 1 Pendidikan Fisika Universitas Sebelas Maret yang belum menerima mata kuliah Fisika Dasar. Data dikumpulkan dengan tes dan wawancara. Hasil penelitian menunjukkan 77,27% mahasiswa mengalami miskonsepsi pada transfer energi benda yang saling bertumbukan. Materi momentum dan impuls sudah diajarkan di kelas XI SMA, meskipun demikian sebagian besar mahasiswa belum memahami konsep secara keseluruhan.
Studi Perpindahan Panas Material pada Sistem Koordinat Segitiga Basuki, Imam; Cari, C; Suparmi, A
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2016
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v1i0.4528

Abstract

Abstract: Partial Differential Equations (PDP) Laplace equation can be applied to the heat conduction. Heat conduction is a process that if two materials or two-part temperature material is contacted with another it will pass heat transfer. Conduction of heat in a triangle shaped object has a mathematical model in Cartesian coordinates. However, to facilitate the calculation, the mathematical model of heat conduction is transformed into the coordinates of the triangle. PDP numerical solution of Laplace solved using the finite difference method. Simulations performed on a triangle with some angle values α and β Keywords:  heat transfer, triangle coordinates system. Abstrak Persamaan Diferensial Parsial (PDP) Laplace  dapat diaplikasikan pada persamaan konduksi panas. Konduksi panas adalah suatu proses yang jika dua materi atau dua bagian materi temperaturnya disentuhkan dengan yang lainnya maka akan terjadilah perpindahan panas. Konduksi panas pada benda berbentuk segitiga mempunyai model matematika dalam koordinat cartesius. Namun untuk memudahkan perhitungan, model matematika konduksi panas tersebut ditransformasikan ke dalam koordinat segitiga. Penyelesaian numerik dari PDP Laplace diselesaikan menggunakan metode beda hingga. Simulasi dilakukan pada segitiga dengan beberapa nilai sudut  dan   Kata kunci : perpindahan panas, sistem koordinat segitiga.
Profil Analisis Kebutuhan Bahan Ajar Mahasiswa Materi Dinamika Gerak Pada Mata Kuliah Fisika Dasar Dimas, Arifian; Cari, C; Suparmi, A; Sarwanto, Sarwanto; Handhika, Jeffry
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2016
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v1i0.4502

Abstract

Bahan ajar adalah segala bentuk bahan yang digunakan untuk membantu pengajar dalam melaksanakan kegiatan pembelajaran yang disusun secara sistematis yang digunakan mahasiswa dalam pembelajaran. Tujuan penelitian ini adalah untuk mendeskripsikan analisis kebutuhan mahasiswa terhadap bahan ajar materi dinamika gerak pada mata kuliah fisika dasar. Metode penelitian ini adalah deskriptif kualitatif dengan sampel diambil terdiri dari 21 mahasiswa semester III pendidikan fisika IKIP PGRI Madiun dan 21 mahasiswa semester III jurusan fisika Universitas Sebelas Maret, yang mana telah menempuh  mata kuliah fisika dasar. Data yang dikumpulkan berupa angket terbuka tentang analisis kebutuhan mahasiswa terhadap bahan ajar materi dinamika gerak pada mata kuliah fisika dasar. Hasil penelitian menunjukkan bahwa bahan ajar yang digunakan masih berupa buku. Mahasiswa mengalami kesulitan dalam memahami bahan ajar yang digunakan. Berdasarkan hasil analisis kebutuhan, mahasiswa membutuhkan bahan ajar berupa modul elektronik berbasis langkah pembelajaran memprediksi, mengamati, menggambarkan dan mengomunikasikan untuk meningkatkan pemahaman konsep pada materi dinamika gerak. Kata kunci : Analisis kebutuhan, Bahan ajar, Dinamika Gerak