Advances in Physics Research

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340 articles
Proceedings Article

Effect of Cr on the Microstructure and Properties of High Nb-TiAl Alloys Prepared by Hot-pressing Sintering

N.L. Zhang, Z.P. Sun
In this paper, the effects of Cr on the microstructure and basic mechanical properties of high Nb-TiAl alloy are studied respectively. The results show that the alloying high Nb - TiAl alloy have film layer microstructure, when adding 2%Cr (at.%), compared with not adding Cr alloy, its microstructure...
Proceedings Article

How Physics can help in understanding Cardiac Rhythms Predicting & Control of complex oscillatory behavior

Shiuan Ni Liang, Le Duy Manh, Wei Yin Chiang, Pik Yin Lai, C. K. Chan
We discuss our recent theoretical and experimental work in cardiac systems. The first is about the rhythmic variation as the cardiac myocyte cell culture synchronized, and how it can be explained in terms of the frequency enhancement phenomenon in coupled excitable systems. Another work concerns the...
Proceedings Article

Effects of Stack Position on the Optimum Performance of a Thermo-acoustics Refrigeration System using ABS (Acrylonitrile Butadiene Styrene) Stack Material

Ida Bagus, Wisnu Hendradjit
In this paper, the optimum thermo-acoustic stack position was investigated. Two types of parallel-plate stacks made of celluloid negative film and ABS materials were selected and investigation was carried out over three working frequencies. The ABS stack revealed that the farther of the stack position...
Proceedings Article

Calculation on Tensile Strength of Notched 2D Woven C/SiC Composite Laminates-Considering the Nonuniformity of Material

Hong-Bao Guo, Bo Wang, Pu-Rong Jia, Cheng-Peng Yang
The tensile strength of a 2D woven C/SiC composite laminates notched with central hole was analyzed and calculated by finite element method. By considering the nonuniformity, material of open-hole specimen was divided into several parts with different density. Tensile properties of 2D woven C/SiC composites...
Proceedings Article

Photocatalytic and Kinetics Study of Copper Oxide on the Degradation of Methylene Blue Dye

Anung Riapanitra, Kapti Riyani, Tien Setyaningtyas
Methylene blue dyes in is widely used various industries in Indonesia, especially in the textile industry. Methylene blue in waters is toxic and difficult to degrade. One of the methods used is to overcome this problem is photocatalysis under visible light. CuO photocatalyst was prepared using an easy...
Proceedings Article

Preparation and Properties of Waterborne PUA/SiO2/TiO2 Composite Materials

X.Y. Zhang, F.X. Qiu
A series of waterborne poly(urethaneacrylate)/ silica/titania (WPUA/SiO2/TiO2) composite materials were prepared by the sol-gel technique. The physical, mechanical and thermal properties of WPUA/SiO2/TiO2 dispersions and films were measured. The prepared composite materials were characterized by the...
Proceedings Article

Prediction of Enantioseparation of Econazole on the Cyclodextrin Derivatives as Chiral Selectors by Molecular Docking Approach

Dadan Hermawan, Cacu Cacu, Nurul Alif Septiorini, Ponco Iswanto, Uyi Sulaeman, Hassan Y Aboul-Enein
Molecular docking approach has been successfully developed for prediction of enantioseparation of econazole on the cyclodextrin derivatives namely sulfated-β-cyclodextrin (S-β-CD) and hydroxypropyl-γ-cyclodextrin (HP-γ-CD) as chiral selectors. Molecular docking was performed using AutoDock Vina software...
Proceedings Article

Photonic jets for micro-etching

Andri Abdurrochman, Sylvain Lecler, Frédéric Mermet, Joël Fontaine, Bernard Tumbelaka
Photonic jet is a localized sub-wavelength beam generated at the shadow-side surfaces of microscale dielectric cylinders or spheres, when they are illuminated by an electromagnetic wave. We demonstrate the potential of the photonic jets for micro-etching using a nanosecond Near-IR laser (l=1064 nm) that...
Proceedings Article

Flexural Performance Study of Glass Fiber Reinforced Foam Concrete with Hydrogen Peroxide

J. Liu, Y.L. Sun
In this paper, using hydrogen peroxide solution foaming method, replace part of cement with fly ash foamed concrete and glass fiber preparation, and using the SEM characterization of the glass fiber to foam concrete internal structure, the influence of glass fiber and hydrogen peroxide is discussed on...
Proceedings Article

In Situ Measurements of Speech Intelligibility in a Private University’s Classrooms in Jakarta, Indonesia

Joko Sarwono, Indra Sihar
This paper discusses in situ measurements of the speech intelligibility of classrooms in a private university in Jakarta. Seven classrooms with and without stepping students seating area are evaluated. Impulse Response method is used to measure the acoustics condition of the classrooms. Their speech...
Proceedings Article

Proliferation and Adhesion of Endothelial Cells on the Surface of Titanium Implant

Jing-Ying Zhang
To observe the proliferation and adhesion of umbilical cord endothelial cells (HUVEC) on the titanium (Ti) surface with large particles blasted-etched (SLA) treatments and further clarify the mechanism of action of each other between the Ti implant surface and the body. Methods: The human umbilical cord...
Proceedings Article

Development of Ketorolac Analysis in Water Samples using Micellar Electrokinetic Chromatography

Dadan Hermawan, Cacu Cacu, Amin Fatoni, Suwandri, Wan Aini Wan Ibrahim, Hassan Y Aboul-Enein
Quantitative determination of ketorolac, a nonsteroidal anti-inflammatory drug (NSAID) in water samples was reported using the micellar electrokinetic chromatography (MEKC) method. The on-line preconcentration technique at MEKC was then investigated to increase the detection sensitivity of ketorolac....
Proceedings Article

Nanocrystalline Cellulose Studied with a Conventional SEM

Harini Sosiati, Mu'minul Muhamin, Purwanto Purwanto, D. A. Wijayanti, Kuwat Triyana
Nanocrystalline cellulose has been successfully studied by conventional scanning electron microscopy (SEM, JSM-6510LA). Nanocrystalline cellulose was extracted from the natural fibers by the chemical treatments of alkalization and bleaching followed by acid hydrolysis. Alkalization and bleaching resulted...
Proceedings Article

Texturization of Monocrystalline Silicon Wafers with K3PO4 /K2sio3 Solutions under Different Conditions

R.Z. Luo, S.Q. Man, Z. Jin, J.J. Ma, Y.Q. Wang, Q.Y. Ye
The pyramid construction was formed with different K3PO4 concentrations under different time and temperatures. The pyramid size, density and uniformity on monocrystalline silicon surface have been studied. We found that the K3PO4 concentrations and temperature has a crucial influence on pyramid density;...
Proceedings Article

Earthquake Microzonation and Strength Building Evaluation at Gelora Bung Tomo Stadium Surabaya Using Micro-Tremor Method

Pebrian Tunggal, M. Ihkyaul, M. Aris
Surabaya has alluvial domination that causes high rise of implication. This research is to know the natural frequency of building and ground, the damping ratio and earth quake micro-zoning. We use FSR (Floor Spectral Ratio) and RDM (Random Decrement Method) method for building analysis, and HVSR (Horizontal...
Proceedings Article

Prediction for Damage Depth of Coal Seam Floor Based on the BP Neural Network

Shun-Feng Li
On the basis summary of forecasting methods and theoretical depth of stope floor, combining a large number of actual data analysis, it is induced that the following six aspects are the main factors influencing the floor damage depth the: mining depth, dip angle of coal seam, mining thickness and length...
Proceedings Article

Characterization of Main-Chain Liquid Crystal Elastomers Using X-ray Diffraction Method

M. Supardi, Yusril Yusuf, M. Harsoyo
We characterized the four main chain liquid crystal elastomers (MCLCEs) samples using the x-ray diffraction method. The four samples had different concentration of crosslinkers, i.e 8%, 12%, 14% and 16%. There was a relationship between crosslinkers concentration and d-spacing parameter here, namely...
Proceedings Article

Reducing Levels of Methyl Orange Dye using Crosslinked Chitosan–Tripolyphosphate

Mardiyah Kurniasih, Anung Riapanitra, Riyanti Riyanti, Dwi Kartika, Dena Rositasari
Chitosan in acid was polycationic and can react with negative charges like tripolyphosphate. Tripolyphosphate was a crosslinking agent with low toxicity. This study was to review the ability of crosslinked chitosan-tripolyphosphate (Cs–TPP) in reducing the color levels of methyl orange. Synthesizing...
Proceedings Article

The Preparation and Property Research of Bismuth Oxide Nanospheres

L.L. Ding, Q. Zhao, J.L. Zhu, Z.J. Fan, B. Liu
Nanomaterials are a new option to successfully treat the multiresistant microorganisms. The as-prepared bismuth oxide with the optimal concentration exhibits stronger antibacterial abilities than others. Meanwhile, it exhibits well biocompatibility. In one word, the present approach can shed new light...
Proceedings Article

Density of States of Twisted Bilayer Graphene at Low Energy

Muhammad Nasruddin Manaf, Iman Santoso, Arief Hermanto
We report the calculation of the Density of States (DOS) in Twisted Bilayer Graphene (TBG) system for low energy range near Fermi level using commensurate rotation of 1.160, 1.790 and 3.480. We obtain a logarithmic behaviour of DOS showing that van Hove Singularities (VHS) are occurred in this system...
Proceedings Article

Corrosion of Permanent Mold Cast Magnesium Alloy AJ62 in Automotive Environments

Fang Li, Jonathan Burns, Henry Hu, Xue-Yuan Nie, Jimi Tjong
Permanent mold cast (PMC) AJ62 magnesium alloy exhibits a fine-grained microstructure in the thin section and a coarse-grained microstructure in the thick section. Microstructure of the PMC AJ 62 alloy was analyzed by using the Scanning Electron Microscopy (SEM). Potentiodynamic polarization experiments...
Proceedings Article

Modified Shrinking Core Model for Removal of Hydrogen Sulfide with T302 Desulfurizer

E.G. Wang, H.X. Guo
The reaction between H2S and ZnO fine particles (T302 desulfurizer) was studied. The experiment results show that at the temperature below 573K, the reaction has stopped before the complete conversion of ZnO particle is obtained. In order to explain the phenomenon, the modified shrinking core model is...
Proceedings Article

Modification and Characterization a New Polymer Chitosan-p-t-butylcalix[4]arenes

Desi Suci, Triana Kusumaningsih, Arbianti Restuti
Modification of chitosan by p-t-butylcalix[4]arenes has been conducted using a nucleophilic subtitution reaction between chitosan, p-t-butylcalix[4]arenes and N,N-diisopropyl carbodiimide (DIC) in reagent dichlorometane at room temperature and under nitrogen atmosphere. Analysis structure of the chitosan-p-t-butylcalix[4]arenes...
Proceedings Article

Optical Rectification Effect on Chiral Metamaterials

Juliasih Partini, Kamsul Abraha, Arief Hermanto, Satoshi Tomita, Matsui Takahiro
Emission of terahertz (THz) radiation as a result of optical rectification of intense femtosecond laser pulses on chiral metamaterials has been observed. The chiral metamamaterials has simplified fabrication design but still capable to exhibit different refractive index for each circular polarization....
Proceedings Article

Estimation of Neonatal Jaundice from the Chest Images Captured with a Smartphone

Mekar Dwi Anggraeni, Amin Fatoni, Eni Rahmawati, Ismei Nartiningsih
Hyperbilirubinemia is a common problem in neonatal for contact with the healthcare facilities. Several methods have been used to determine the bilirubin concentration. However, it is not easy to find the healthcare with the instrument to detect bilirubin, mainly in rural area. This research was aimed...
Proceedings Article

The Common Features of The Geometry Angle Applied for Hard Cutting Materials

Z.Y. Wu, X.Y. He, K.W. Ji, X.J. Tang
With the continuous development of science and technology, the high hardness materials are finding wider and wider application in all fields. But the high hardness make it hard to cut them, which has been a bottleneck to their further application. In this paper, about three hundreds papers on hardness...
Proceedings Article

Using Symbolic Computation to Inductively Prove Geometric Theorems And Its Implication to The Study of General Relativity

Arief Hermanto
One can reasonably say that we always prove geometric theorems using deductive method. The deductive method is too often used such that we get the impression that there is no other alternative appropriate method. In this paper we will use inductive method. We need many special cases to prove so that...
Proceedings Article

Implications of Twilight Sky Brightness Measurements on Fajr Prayer and Young Crescent Observation

Dhani Herdiwijaya
The morning and evening twilight brightness are important to probe the properties of the upper atmosphere. We conducted a short survey of broad band twilight sky brightness measurements by using a portable photometer with 5 second resolution, in five places with different elevations. The darkest zenith...
Proceedings Article

Experimental Research on Application of Kinetic Model to Predict Shelf-life of Military Instant Rice

P. Li, X. F. Li, X.Y. Liu, L.G. Xiong
On the basis of accelerated test of food shelf life theory, the changes of acid & peroxide value of military instant rice packaged by PET/AL/PA/PE coextruded film at different storage temperature were studied. The kinetics models of shelf life were obtained at corresponding temperature so as to predict...
Proceedings Article

The Graphs of the CDF, Power and Its Interpretation on Several Types of Binomial Probability Distribution

Budi Pratikno, Evita Luaria Wulandari, Jajang Jajang, Junita Sage Sianipar, Mashuri Mashuri
The research discussed the graphically analyzed of the cumulative distribution function (cdf), and the power function of hypothesis testing on the binomial distribution. In this research, we also showed (derived) the formula of the power function on special case of binomial such us Negative Binomial...
Proceedings Article

Poly(3,4-Ethylenedioxythiophene) Derivatives with Electrochemical Chiral Sensor for 3,4-Dihydroxyphenylalanine Discrimination

H. Sun, D.F. Hu, L.Q. Dong, X.F. Zhu, Y.S. Zhang, H.K. Xing, X.M. Duan
Two chiral poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives, poly(N-(tert-butoxycarbonyl)-Lphenylalayl (3,4-ethylenedioxythiophene-2'-yl)methylamide) (PEDOT-Boc-Leu) and poly(L-phenylalayl (3,4- ethylenedioxythiophene-2'-yl)methylamide) (PEDOT-Leu) modified electrodes were used to recognize 3,4-...
Proceedings Article

Stability of Triangular Equilibrium Points of Exoplanetary System HD 4732c by Including Radiation Effect

B. Dermawan, Ibnu Nurul Huda, T. Hidayat, D. Mandey, R.W. Wibowo, I. Tampubolon, J. A. Utama
Exoplanetary system HD 4732 harbors two planets (b and c) in elliptic orbits. The host star (HD 4732) is more energetic than the Sun, while the planets are Jupiter-class. In this work we deal with the triangular equilibrium points with respect to planet HD 4732c because, interestingly, its orbit is located...
Proceedings Article

Residual Strain in Welded Joint of Pre-Strained Steel Plate

Ignatius Henry, Triyono Triyono, M. Refai, Nurul Muhayat
The measurement of internal residual strain on the elastic, yield and plastic pre-strained of SS400 during welding had been performed using neutron diffraction technique. SS400 steel has been welded using gas metal arc welding (GMAW) in pre-strained condition of 0%, 1%, 3%, and 5%. This paper will present...
Proceedings Article

The Dengue Hemorrhagic Fever Modeling in Banyumas Regency by Using CAR-BYM, Generalized Poisson, and Negative Binomial

Jajang Jajang, Budi Pratikno, Mashuri Mashuri, Indriani Eko Cahyarini
The research studied disease mapping of dengue haemorrhagic fever (DHF) in Banyumas Regency. The generalized Poisson (GP), negative binomial (NB), and CAR-BYM models are then used to modelling the DHF. The predictor variables used in this research are the number of health worker, altitude, and population...
Proceedings Article

Analysis of Influencing Factors for Sliding Wear-Fatigue Damage Interaction

Yu-Tao Yan, Yuan-Jun Xu, Xiao-Lin Qian
The variable regular for sliding wear under load, sliding velocity, temperature and surface roughness and fatigue damage under load, sliding velocity and surface roughness by mass experimental datum were established. The analytic model for sliding wear-fatigue damage interaction was established. The...
Proceedings Article

Tunable White-Light-Emitting Molecules Based on Europium(III) Complexes

X.L. Zhang
New Europium(III) complexes were designed and synthesized as new white light emitting molecules. Eu(III) complexes comprised a blue light emitting Courmarin 6G fluorophore and a EuIII moiety as the origin of red light and thus exhibited red, blue or white light in different excitation wavelength and...
Proceedings Article

Numerical Study of Motion of Sun-Grazing Comet C/2011 W3 (Lovejoy) Affected by Outgassing, General Relativity, and Oblateness Correction Forces

R. W. Wibowo, B. Dermawan, T. Hidayat, D. Mandey, Ibnu Nurul Huda, I. Tampubolon, J. A. Utama
Among comets there are several groups of Sun-grazers. Sun-grazing comets are comets whose motions encounter very closely to the Sun and may eventually plunge into the Sun. Sun-grazing comet C/2011 W3 (Lovejoy) was not expected to survive during close encounter with the Sun on December 16, 2011 due to...
Proceedings Article

The Effect pf Non-Homogenous Perforation Pattern on Sound Absorption Bandwidth of Micro-Perforate Panel

Iwan Prasetiyo, Joko Sarwono, Indra Sihar
Absorption bandwidth of conventional Micro-Perforated Panel backed by air cavity is limited around 1 octave bands particularly for pore diameter close to 1 mm. Compared with porous material, the absorption bandwidth is relatively narrow. Hence, its applications may become limited. This research shows...
Proceedings Article

Nanometer SiO2 Antireflection Coating for Solar Modules

W. Wei, X.N. Zhu, Y. Zhao, Q. Wu
In the applications of solar cells, reflection is an unwanted loss process. Using antireflective solar glass can improve the generating efficiency of solar cells. Here the design, synthesis, modification, and characterization of the nano antireflective film for solar modules are reported. Nanometer SiO2...
Proceedings Article

Coefficient Estimates in the Class of Bazilevic Functions ℬ1(α) Related to the Lemniscate Bernoulli

Ni Made Asih, Marjono Marjono, Sa’adatul Fitri, Ratno Bagus E.W
In this research, we estimate the coefficient in the class of Bazilevic functions ℬ1(α) related to the Lemniscate Bernoulli on the unit disk 𝔻={z:|z| < 1}, satisfying subordination condition [f′(z)(f(z)z)α−1]≺1+z, for z ∈ 𝔻. The upper bound of the modulus of a2 and a3 are determined.
Proceedings Article

A DFT sight of oxygen and carbon monoxide coadsorption on Pt-alloy surfaces

Wahyu Tri Cahyanto, Wahyu Widanarto, Hideaki Kasai
Coadsorption of oxygen (O) and carbon monoxide (CO) on Platinum-alloy (Pt-alloy) surfaces is investigated by using density functional theory (DFT). Simultaneous coadsorption and alloying are considered in order to get more realistic picture of the electrode condition, i.e., in relation with surface CO...
Proceedings Article

The Vacancy-hardening Properties in Water-quenched Fe-Al Alloys

Z.C. Zhou, J. Du, Y.K. Zhang, Y.P. Zhang, S.Y. Gu
Fe-Al alloys with different Al contents were prepared with commercially pure Fe and Al in a vacuum induction furnace. The hardness of the Fe-Al alloys with different Al content and heat treatments was measured using a Vickers-hardness tester of HVS-5, applying a load of 9.8 N and keeping for 8 s. In...
Proceedings Article

Solution Formula of the Half-Space Model Problem for Incompressible Fluid Flow

Maria Leonids Berlian Candra Dewi, Sri Maryani, Ari Wardayani, Bambang Hendriya Guswanto
In this paper we determine a slightly detailed the solution formula of the incompressible fluid flows by using Fourier transform in N-dimensional Euclidean space (N≥ 2) for the linearized equations. For further research, from this result we can estimate the boundedness of the operator families. This...
Proceedings Article

Nanocrystalline Mixed Oxides for the Selective Oxidation of Propane

Z.X. Yu, W. Zheng, H.Y. Fu, H. Wu, X.L. Fan
In the applications of solar cells, reflection is an unwanted loss process. Using antireflective solar glass can improve the generating efficiency of solar cells. Here the design, synthesis, modification, and characterization of the nano antireflective film for solar modules are reported. Nanometer SiO2...
Proceedings Article

Monte Carlo Simulation of the Nematic-Isotropic Phase Transition of Liquid Crystals under Magnetic Field

M. Warsono, Yusril Yusuf, Pekik Nurwantoro, Kamsul Abraha
The effect of magnetic field on the nematic-isotropic phase transition of liquid crystal was studied by Monte Carlo simulation. The classical spin lattice model was used to describe the liquid crystal systems and the Lebwohl-Lasher potential model. We calculate the energy per spin, the orientational...
Proceedings Article

The Electrical Hysteresis Loop and Polarization Value of BaZrxTi1-xO3 Multilayer Films Material at Different Annealing Temperature (x = 0.1 and 0.08) based on Sawyer Tower Circuit

La Ode, Muhammad Hikam, Bambang Soegijono, Arief Sudarmaji
The crystallographic properties and ferroelectric state of BZT multilayer films which deposited on Si (100) substrate was studied in this work. XRD pattern peaks show that BaZr0.1T0.9O3 and BaZr0.08Ti0.92O3 are found well-crystallized at 800oC for 3 hours corresponding to vary annealed temperature. The...
Proceedings Article

Cross-linking Peptide Vaccine Heat Shock Protein 72 and Alpha-fetoprotein Elicited Specific Dendritic Cells, Cytotoxic T-lymphocyte Cells and Natural Killing Cells

Xiao-Ping Wang, Bing Xu, Huan-Ping Lin, Qian Zhao, Ke-Pei Zhang, Yi-Xin Yang
Alpha-fetoprotein (AFP) is an oncofetal protein during Hepatocellular carcinoma (HCC) development which could generate weaker and less reproducible antitumor protection, and may serve as a target for immunotherapy. Therefore, it is imperative to enhance its immunogenicity and develop therapeutic vaccines...
Proceedings Article

Microstructure Evolution of Carbon Fiber in PIP-processed C/SiC Composites under High Temperature Environment

Y. Xiang, Q. Wang, H.F. Cai, Y. Liu, F. Cao
The thermal stability of carbon fiber in PIPprocessed C/SiC composites under high temperature environment was studied. The microstructure evolution of carbon fiber in PIP-C/SiC composites was characterized. The results showed that the microstructure of carbon fiber gradually destroyed with the elevation...
Proceedings Article

Stability Analysis of Biological Wastewater Treatment in Facultative Stabilization Ponds: Mathematical Model

Mia Nur Islami, Sunarsih Sunarsih, R Heru Tjahjana
Wastewater stabilization pond is a very large pond where wastewater is stored for a long time, in that pond there is a biological process of organic matter in the sludge produced from primary deposition, and it’s resulting in stable biological treatment of wastewater. Wastewater treatment is used to...
Proceedings Article

Research of Trace Elements Content in Tea Based on Flame Atomic Absorption Spectrometry

Q. Liu
The determination method for the content of trace element of Cu, Fe, Mn, Zn and Ni in tea by the wet digestionflame atomic absorption spectrometry (FAAS) was established. The effect of digestive reagents, the volume of digestion and the digestion time were investigated in detail. The optimum condition...
Proceedings Article

Project Based Vocational Skills in Teaching Materials for Physics Education

M. Susilawati
This research project is based on vocational skills in physics teaching materials for vocational high school students. Vocational skill-based project was developed to improve the skills of vocational students. The series of student activities, scientific activities and assignments designed so as to help...
Proceedings Article

Study on Micro-structure and Micro-hardness of Thick Plate 16Mn Steel

Yong-Tao Zhao, Zi-Xiao Liang, Li-Ping Zhao, Yu-Feng Wang
The 16Mn steel has good mechanical properties and welding performance, so it is used widely in pressure vessels, petroleum storage tanks and pipelines of oil and gas. Submerged arc welding was employed to weld 16Mn, by OM, the microstructure in every region of welding joint was observed, by means of...
Proceedings Article

Synthesis of Zinc Oxide (ZnO) Nano Particles Using Sol Gel Method as Active Material on Gas Sensor

Slamet Widodo, Tony Krsitiantoro
Gas sensor was needed to detect and the presence of gas, either for toxic gas or non toxic gas. The one of the important part in gas sensor instrument are the metal oxide. There are some ways to make metal oxide for sensing material of gas sensor; the one is sol-gel process. The purpose of this experiment...
Proceedings Article

Analysis of Mathematical Connection Abilities in the Seventh Grade Students of SMP Muhammadiyah Pakem in Solving Line and Angle Question

Ririn Adi Nurhudha, Riyadi Riyadi, Sri Subanti
Currently, the development of the quality of human resources will determine the progress of a nation. The era of the industrial revolution 4.0 requires someone to master several skills, one of which is the ability of students’ mathematical connections. By having mathematical connection skills, students...
Proceedings Article

Adsorption and Mobility of Lithium on Pristine and Stone-Thrower-Wales Defective Silicenes

Y. Xin, Y.X. Yu
To explore and rationalize the enhancement of the capacity of lithium-ion batteries, ab initio density functional theory was employed to investigate the adsorption and diffusion properties of a lithium atom on and through pristine and Stone-Thrower-Wales (STW)-defective silicenes. The theoretical calculations...
Proceedings Article

Numerical Modeling of 2-D Conductive Heat Transfer and Its Application for the Characterization of Geothermal Systems

Setya Drana Harry Putra, Silvia Jannatul Fajar, Wahyu Srigutomo
A geothermal system is basically a system where heat is transferred from the internal part to the surface of the earth dominantly by conduction, convection, or both. The spatial variation of the magnitude of conductive heat transfer represented by lateral variation of observed surface heat flow values...
Proceedings Article

Determination of Mesalazine Using Terbium Rare Earth Ions as a Fluorescence Probe

Yu-Guang Lv, Di Song, Du A, Ji-Hui Zheng, Hong-Bing Gao, Xiao-Li Qi, Jiang Wu, Zhong-Ping Gong, Jie Teng
Ulcerative colitis is chronic nonspecific colitis. Now,the main first-line drugs are preparations with mesalazine. Chemical name of mesalazine is 5- aminosalicylic acid (5-ASA), which one of colon target drugs has function of anti-inflammatory by inhibit process of leukotriene, prostaglandin E(PG) and...
Proceedings Article

Hadamard Matrix on Cryptographic Problems

Salman Al Farizi, Mashuri Mashuri, Bambang Hendriya Guswanto
The application of matrices to cryptographic problems, especially with Hill Chiper algorithm, needs an invertible matrix as a key and a plaintext’s difuser. One of the invertible matrices is a Hadamard matrix (H). The Hadamard matrix is applied to cryptographic problems with Hill Chiper algorithm by...
Proceedings Article

Fabrication of Rare Earth Copolymerized Monodisperse Poly (Methyl Methacrylate) Microspheres Material

C.H. Yan, Y. Li, H. Wang, M. Zhang
A kind of rare earth copolymerizd monodisperse poly (methyl methacrylate) microspheres material was synthesized through dispersion polymerization. The chemical structure and chemical properties of the material were characterized by means of canning electronic microscope morphology (SEM), ultraviolet...
Proceedings Article

Development of Human Postural Balance Monitoring System in Bipedal Standing

Yakub Fahim, Rony Wijaya
A monitoring of human postural balance in bipedal standing is an important parameter in medicine, related to balance disorder. A Human Postural Balance Monitoring System in Bipedal Standing (HPBMSBS) consists of a 3- axis digital position sensor module, a Programmable System-on-Chip (PSoC) 4, and a PC-display....
Proceedings Article

Light-induced Phase Transition of Lyotropic Liquid Crystals and Motion Behavior of Micron Objects via Photochemical Azobenzene Molecules

Su Ma, Yutaka Kuwahara, Tomonari Ogata, Sunnam Kim, Seiji Kurihara
Ternary lyotropic liquid crystal (LLC), was prepared by mixing tetradecyltrimethylamonium bromide (MTAB), water and azobenzene (Az). The phase transition of the LLC was induced from LC phase to isotropic (I) one upon Ar+ laser, which was owing to the trans-cis-trans phoisomerizaion cycle of Az during...
Proceedings Article

The Existence of the Moore-Penrose Inverse in Symmetrized Max-Plus Algebraic Matrix

Suroto Suroto, Najmah Istikaanah, Renny Renny
In this paper we discusses Moore-Penrose inverse in symmetrized max-plus algebraic matrix. The existence of Moore-Penrose inverse is shown using a link among symmetrized max-plus algebra and conventional algebra. The result is a Moore-Penrose inverse in symmetrized max-plus algebraic matrix exists. Furthermore,...
Proceedings Article

Influence of Isopropyl Nitrate on Combustion Characteristics of Triple-base Propellant

M.H. Chen, Y.K. Chen, Q. GE, S.G. Wang, H.C. Wang
In order to study the influence of Isopropyl Nitrate on combustion characteristics of triple-base propellant, the combustion of triple-base propellant was tested with closed bomb. Combustion characteristic parameters including maximum pressure, combustion time, gas generated brisance, pressure impulse,...
Proceedings Article

Perforated Flexible Membrane Insertion Influence on The Sound Absorption Performance of Cavity Backed Micro Perforated Panel

Harjana Harjana, Iwan Yahya
Sound absorption performance of cavity backed perforated panel on respect to the influence of flexible perforated membrane insertion was investigated by using a laboratory experiment. A layer of perforated flexible membrane was fitted inside the cavity backed MPP and the sound absorption coefficient...
Proceedings Article

Research on Thermal Decomposition of Double-base Propellant

H.C. Wang, M.H. Chen, Y.K. Chen
The importance of the quantum chemical method and thermal decomposition kinetics on double-base propellant was reviewed. The main analysis methods and theory mode of thermal decomposition kinetics were enumerated and analyzed. It is significant to put quantum chemical method and thermal decomposition...
Proceedings Article

A Comparison of Second-Order and High-Order of Finite Difference Staggered-Grid Method in 2D P-SV Wave Propagation Modelling using Graphics Processing Unit

Irchan Bani Hasym, M. Sudarmaji, M. Sismanto
A comparison of second order and high order (4th, 8th and 12th order) of finite difference staggered-grid method on 2D P-SV elastic wave propagation has been conducted. The comparison plot of numerical dispersion and accuracy among each order has been generated to show the stability condition. CUDA C...
Proceedings Article

The Influence of Doping Ag on Photovoltaic Characteristic of CuI Film

Qiang Wang, Xi-Ying Ma
Cuprous iodide (CuI) is a p-type semiconductor material with wide band gap, which has attracted considerable attention in recent years because of its unique photoelectric characteristic and potential application in solar cells. This article presents the preparation of Ag doped and undoped CuI films on...
Proceedings Article

The Properties of the Rn Module over the Matrix Ring Mn×n(R)

Triyani Triyani, Ari Wardayani, Alfalfa Amruhasanah
This paper discusses the properties of the Rn module over the matrix ring Mn×n(R) related to the torsion module, prime module, multiplication module, and faithful module. The study results concluded that the Rn module over the matrix ring Mn×n(R) is a torsion module because each element of Rn is a torsion...
Proceedings Article

Study of Induced Current Electrical Impedance Tomography Configuration on 2 Dimensional Rectangular Object

Dudi Darmawan, Deddy Kurniadi, Janivita Sudirham, Suyatman Suyatman
Sensitivity issue becomes a common problem on Electrical Impedance Tomography. One effort to overcome this issue is through inducing a magnetic field. It needs proper inducer coil configuration in order to produce a good reconstruction result. In this study, inducer coil configuration is obtained to...
Proceedings Article

Catalytic Synthesis of Fatty Acid Esters of Isethionate with High Surface Activity

G.X. Zhang, L. Zhang
In this report, a kind of fatty acid esters of isethionate was synthesized with myristic acid and sodium hydroxyethyl sulfonate as raw materials and methane sulfonic acid as catalyst. Then, the effects of molar ratio of reactants, reaction temperature, catalyst dosage and reaction time on the product...
Proceedings Article

Estimation of Frequency Dependent Attenuation of Seismic Wave in Time-Frequency Domain Based on Continous Wavelet Transform (CWT)

M. Sudarmaji, M. Sismanto, M. Waluyo
Frequency dependent attenuation of seismic waves that propagate through the partially fluid saturated porous rock will be observed. The new method for estimation of frequency dependent attenuation will be developed. The frequency dependent attenuation will be calculated in time-frequency domain which...
Proceedings Article

The Technology and Application of Shrink Packaging

Shang-Jie Jiang, Jun-Yan Huang
Shrink packaging is a packaging way which is widely used in the field of modern goods packaging. Its packaging forms, the development of new technology and application field ware summarized. Its outstanding features, such as transparent and intuitive, efficient, seal and moistureproof, flexible and convenient...
Proceedings Article

A Short Note on the Complex Conjugate for Derivatives

Abdul Manan
The complex conjugate approach could be used easily to solve derivatives analytically for some simple cases in calculus. These cases are common topics in calculus which are functions of trigonometry, hyperbole, exponential and logarithm. In general, the derivative obtained from the component v is rearranged...
Proceedings Article

Synthesis and Photochromism Studies of 1-[2-methyl-5-(2-pyridyl)-3-thienyl]-2-[2-methyl-5-(4-bromomethylphenyl)-3-thienyl] Perfluorocyclopentene

X.G. Tang, H.L. Liu, S.Z. Pu
A new photochchromic diarylethene was synthesized and explored, which is named 1-[2-methyl-5-(2- pyridyl)-3thienyl]-2-[2-methyl-5- 4-bromomethylphenyl -3- thienyl]perfluorocyclopentene. The results showed that it have excellent photochromism, accompanied with the color change from colorless to blue,...
Proceedings Article

Synthesis and Photochromic Properties of Unsymmetry Diarylethene1-[2-methyl-5- (4-n-amyl-phenyl)-3-thienyl]-2-[2-methyl-1-phenyl] Perfluorocyclopentene

F. Xu, X.D. Zhang, X.R. Dong, G. Liu
An unsymmetrical photochromic diarylethene, 1-[2- methyl-5-(4-n-amyl-phenyl)-3-thienyl]-2-[2-methyl-1-phenyl] perfluorocyclopentene (1o), has been synthesized. Its photochromic properties were examined. The results showed that this compound exhibited reversible photochromism and undergo reversible cyclization...
Proceedings Article

Embedded-based Instrumentation System for Electrical Resistivity Measurement on Conductive Concrete using Four-Electrode Method

La Ode, Prawito Prawito, Arief Sudarmaji
Instrumentation system for testing of conductive concrete material using four-electrode method has been built. The system can measure material resistivity under the influence of voltage-injection variable, temperature changing in the characterization reactor, as well as the duration of the material characterization....
Proceedings Article

Design of Radiography Film Dryer Machine Using Timer

Efita Pratiwi Adi, Anita Nur Mayani, Hendri Ermawan
Drying is the final step of the film processing cycle which aims to remove the water present in the emulsion layer. The result of the film processing is an undamaged emulsion, free from dust particles, crystal deposits, stains, and artifacts. This research aims to make radiography film dryer with a timer....
Proceedings Article

The 2D Finite Difference Numerical Modelling of P-SV Wave Propagation In Elastic Heterogeneous Medium Using Graphic Processing Unit: Case Study of Mount Merapi Topography, Yogyakarta

Theodorus Permana, M. Sudarmaji
Simulation of seismic wave propagation has been very important way to study the relation between a specific condition of earth medium and seismogram recorded during a seismic event such as an earthquake. In this study, a numerical modelling of P-SV wave propagation in elastic heterogeneous medium has...
Proceedings Article

The Cost Reduction Research of GPTMS-Boehmite Transparent and Hard Coating Film

Kui Chen, Tian-Yun Zhang, Xiao-Ping Zheng
In order to reduce cost and contain properties, GPTMS-boehmite transparent and hard coating film was prepared by replacing boehmite with aluminium isopropoxide (AIP), and modified by hydrolyzed TEOS. By the research of the process, a cheap transparent coating film with a pencil hardness of 4H and adhesion...
Proceedings Article

Synthesis and Properties Study of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(3-methyl)-phenyl-3-thienyl] Perfluorocyclopentene

J.J. Liu, H.L. Liu, S.Z. Pu
A novel photochromic diarylethene bearing a pyrimidine moiety, 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2- methyl-5-(3-methyl)-3-thienyl]perfluorocyclopentene has been synthesized. Its properties, including photochromic and fluorescent behaviors, have been investigated. The compound exhibited remarkable photochromism,...
Proceedings Article

Identification of the Existence of Inferred Menanga Fault based on Gravity Anomaly, Pesawaran, Lampung

Izaina Nurfitriana, Purwaditya Nugraha, Rizki Wulandari, Erlangga Ibrahim F, Adhi Wibowo
Inferred Menanga fault is one of fault that is still questionable whether it exists or not. It is located in Pesawaran regency, Lampung, exactly near Ratai Mountain with SE-W orientation and almost crosses the summit of Mount Ratai. The existence is sticking out and needs to be studied since there were...
Proceedings Article

Synthesis and Application of 1-(3, 5-dimethyl-4-isoxazolyl)-2-{2-methyl-5-[4-(1,3-dioxolane)-phenyl] -3-thienyl} Perfluorocyclopentene

Y.L. Fu, D.D. Xue, C.B. Fan, S.Z. Pu
A new unsymmetrical photochromic diarylethene 1- (3,5-dimethyl-4-isoxazolyl)-2-{2-methyl-5-[4-(1,3-dioxolane)- phenyl]-3-thienyl}perfluorocyclopentene (1o) has been synthesized. Its properties have been discussed systematically, including photochromic, fluorescence switch and kinetics experiments in...
Proceedings Article

Research Advance on Accelerating Anaerobic Sludge Granulation Process

Xin-Long Jiang, Yi-Hua Jiang, Jiang-Qun Wang, Yu-Yun Zhen
The application of sludge granulation was regarded as one of the promising biotechnologies in wastewater treatment. Anaerobic sludge granulation process is a multistage process that is decided by many factors such as operational condition, substrate and so on. After summarizing the existing mechanisms...
Proceedings Article

The Development of Polypropylene Itaconate (PPIA) for the Film Sensor as Preliminary Study for Meat Distinguisher

Atmanto Heru, Silami Dwi, Ryan Crysandi, Ninis Makhnunah, Budi Purnama, Ari H Ramelan, Henning Storz
A thin film of PPIA synthesized from polycondensation reaction of itaconic acid (IA) and 1,3-propanediol (PDO) with spin coating method has been made. To develop the film property, various glycerols (gly) were added during reaction to form PPIA film with 10%, 30%, 50%, and 70% of the total weight of...
Proceedings Article

Synthesis and Properties of a New Unsymmetrical Diarylethene 1-{2-methyl-[5-(4-trifluoromethyl)phenyl-3-thienyl]}-2-{[2-methyl-5-(3- chlorine)phenyl]-3-thienyl} Perfluorocyclopentene

S.Y. Li, R.M. Lu, D.B. Zhang, S.Z. Pu
A novel unsymmetrical isomeric photochromic diarylethene, 1-{2-methyl-[5-(4-trifluoromethyl)phenyl]-3- thienyl}-2-{[2-methyl-5-(3-chlorine)phenyl]-3- thienyl}perfluorocyclopentene, was designed and synthesized. Its fluorescent and photochromic properties were also investigated in detail. The compound...
Proceedings Article

Development and Testing of Artificial Neural Network with Backpropagation Algorithm to Predict the Power Ratio of Savonius Wind Turbine

Jamrud Aminuddin, Bilalodin Bilalodin
A power ratio of Savonius as a vertical wind type has been predicted using an artificial neural network (ANN) with a backpropagation algorithm. The ANN is a method for processing information that is adapted from a biological neuron. This method is developed from the principle of a human being’s brain...
Proceedings Article

Synthesis and Properties of a Novel Diarylethene 1-(2-cyano-1,5-dimethyl-4-pyrryl)-2-{(2-methyl-4-hydroxymethylphe-nyl)-3-thienyl} Perfluorocyclopentene

Y.M. Xue, E.T. Feng, D.D. Xue, R.J. Wang, S.Z. Pu
An asymmetrical photochromic diarylethene 1-(2- cyano-1,5-dimethyl-4-pyrryl)-2-{(2-methyl-4hydroxymethylphe -nyl)-3-thienyl}perfluorocyclopentene (1o) was synthesized and its photochromic properties as well as reaction kinetics were investigated in detail. Upon irradiation with 297 nm UV light, diarylethene...
Proceedings Article

Microstructures of Surface Alloyed High Manganese Cast Steels

Chang-Qing Guo, An-Jun Shi, Ji-Wei Han
EPS templates attaching a compressed powder disk on a surface that are mainly consisted of Ni-WC powders were prepared. High manganese molten steels were poured into the templates forming a surface alloyed sample using V-EPC process. After water quenching from 1050ºC, the microstructures of the steels...
Proceedings Article

Identification of Mass Movement Area in Liwa, Lampung Barat by Using Georadar and Geoelectricity Method

Yusraida Khairani, M. Sismanto, Mohamad Ervan
Georadar method with radar reflection profiling configuration and geoelectrical method with dipole-dipole configuration has been done to determine the lithology, fracture characteristics of weak zone or fault that could potentially result of mass movement in Liwa, Lampung Barat. This research was conducted...
Proceedings Article

Transmittance Simulation of Surface Textured Fluorine Doped Tin Oxide (FTO) for Dye Sensitized Solar Cell (DSSC) Application

Kusumandari Kusumandari, Risa Suryana
The aim of this research is to simulate the transmittance of fluorine doped tin oxide (FTO) for dye sensitized solar cell (DSSC) application. Simulation was performed using finite difference time domain (FDTD) method based on Maxwell equation for flat and nano cone periodically surface textured of FTO....
Proceedings Article

Synthesis and Properties of 1-(2-methyl-5-(4-tolyl)-3-thienyl)-2-[2-methyl-5-(4-n-pentyl phenyl)-3-thienyl] Perfluoroyclopentene

P. Liu, X.R. Dong, F. Duan, S.Z. Pu
An unsymmetrical photochromic diarylethene, 1-(2-methyl-5-(4-tolyl)-3-thienyl)-2-[2-methyl-5-(4-npentyl phenyl)-3-thienyl] perfluorocyclopentene was synthesized, and its photochromic properties, kinetics of the photochromic cyclization/cycloreversion and fluorescence were investigated in detail. The...
Proceedings Article

Study on Several Padé Approximants for Fully Ionized Hydrogen Plasmas

Xing-Rong Zheng, Ji-Hong Li, Li-Huan Yang, Yang Li
Based on the current proposed three type Padé approximations of fully ionized hydrogen plasmas. Using Fortran program, we calculated the Helmholtz free energy of hydrogen plasmas and made a comparison of these Helmholtz free energy. It is concluded that the dimensionless parameter feec of W.Stolzmann’s...
Proceedings Article

Synthesis and Properties of 1-(3, 5-dimethyl-4-isoxazolyl)-2-[2-methyl-3-benzothiophenyl] Perfluorocyclopentene

L.L. Ma, G. Liu, X.R. Dong
A novel asymmetrical photochromic diarylethene compound 1-(3,5-dimethyl-4-isoxazolyl)-2-[2-methyl-3- benzothiophenyl]perfluorocyclopentene 1o has been synthesized, its photochromic properties and fluorescent properties were investigated in detail, such as photochromic, fluorescence switch and kinetics...
Proceedings Article

Cavity Sound Pressure Enhancement of the Second Generation Power Generating Helmholtz Resonator with X-shaped Cavity Junction

Iwan Yahya, Harjana Harjana, Eqi Muqowi
Cavity sound pressure level is a very important measure when dealing with the design of resonator based power generating sound absorbers and sound diffusers. This paper presents results from experimental study of the performance of the second generation iARG-X2 power generating Helmholtz resonator. The...
Proceedings Article

Detection and Characterization of Lung Cancer using CT Scan Technology

Lilik Lestari, Susilo Susilo
Today, lung cancer is one of the deadliest diseases in the world, with an early sign of Lung Nodule. One of the standard procedures to detect it is a radiological examination using Computed Tomography (CT) Scan technology. This study aims to describe the use of CT Scan to detect the presence of lung...
Proceedings Article

Frequency Analysis and Sismic Vulnerability Index by Using Nakamura Methods For Microzonation at Prambanan Temple and Its Surrounding Area, Yogyakarta Province, Indonesia

Fathul Mubin, Budi Eka Nurcahya
In 2006 a large earthquake ever occurred in the province of Yogyakarta, which caused considerable damage. This is the basis need to investigate the seismic vulnerability index in around of the earthquake zone. This research is called microzonation of earthquake hazard. This research has been conducted...
Proceedings Article

Synthesis and Properties of Unsymmetry Diarylethene 1-[2-methyl-5- trimethylsilacetenyl-3-thienyl]-2-[2-Cyanophenyl] Perfluorocyclopentene

S.Z. Qu, B. Chen, L.L. Li, C.H. Zheng, S.Z. Pu
A new unsymmetrical photochromic diarylethene 1- [2-methyl-5- trimethylsilacetenyl-3-thienyl]-2-[2-Cyanophenyl] perfluorocyclopentene (1o) were synthesized. Under alternating irradiation with UV and visible light, the compounds showed favorable photochromism in hexane. The product changing from colorless...
Proceedings Article

Numerical Entropy Production of Shallow Water Flows along Channels with Varying Width

Sudi Mungkasi
We study the behavior of numerical entropy production of shallow water flows along channel by varying width. The topography is assumed to be horizontal, but the channel width can be in an arbitrary shape. The flows are governed by the system of shallow water equations. These equations are numerically...
Proceedings Article

Characteristics of Rock Minerals of the Camba Formation

Muhammad Altin Massinai, Muh. Rexy Syam, Muhammad Fawzy Ismullah Massinai
The Camba Formation (Tmcv) of Tertiary age is spread over the southern part of South Sulawesi, especially in Gowa and Maros Regencies. The Camba Formation, which consists of igneous rocks from the ancient Camba volcano, has different mineral characteristics. Analysis of mineral characteristics using...
Proceedings Article

Comparisons of Fastness of the Coating Processes of Electroless Silver Plating on Polyethylene Membrane Surfaces

S. Yu, W.J. Zhang, H.T. Geng, Y.H. Chen, G. Wang, Q. Wu, X.X. Zhu, Q.H. Zou
The comparisons of fastness of the different coating processes of electroless silver plating on polyethylene membrane surfaces were investigated. The average fastness values of the impregnation (from 2.0 ± 0.5 in I3-1 to 4.0 ± 0.5 in I2-1), the brush (from 4.0 ± 0.3 in B3-1 to 4.5 ± 0.3 in B2-1) and...