Advances in Physics Research
511 articles
Proceedings Article
Preparation and Characterization of Hybrid Polymer-Inorganic Solar Cells Sub-Module
Erlyta Septa, Fauzie Rachman, Abdul Hafid
In this study, we propose a method for preparation of hybrid polymer solar cell sub-module, which is achieved by internally series-interconnection of 3 (three) single hybrid polymer solar cells based on MDMO-PPV and ZnO blend on a flexible substrate. The structure of the device was ITO/PEDOT-PSS/ZnO:MDMO-PPV/Ag....
Proceedings Article
Study on Cutting Mechanism of Monocrystalline Silicon Using Molecular Dynamics on Nanometric Scale
Li-Qiu Shi, Jia-Xin Xie, Ming-Dong Xi, Xiao-Hai Li, Feng Yu
Using molecular dynamics simulation method study the mechanism of nanometric cutting of monocrytalline silicon. We used LAMMPS software programming to establish model.Through VMD video software to display the image of cutting process and combining with the change of potential and temperature, we understand...
Proceedings Article
Calculations of the Potential Energy Surface for a Water Molecule Dissociation on the Pt (111) Surface
Siti Zulaehah, Diska Nirmala Wahyu Dinasty, Allan Abraham Bustria Padama, Wahyu Tri Cahyanto
We present a density functional theory (DFT) study of the dissociation pathway of monomeric H2O into adsorbed hydroxyl (OHads) and hydrogen (Hads) on the Pt(111) surface. Here we consider the Langmuir-Hinshelwood process of adsorbed monomeric H2O, which is then dissociated on the surface model. By calculating...
Proceedings Article
A Study of the Rainbow Antimagic Coloring of Double Wheel and Parachute Graphs
Syahril Maghfiro, Dafik, Arika Indah Kristiana, Rosanita Nisviasari, Slamin, Ika Hesti Agustin
In this study, we explore the idea of rainbow antimagic coloring, which combines the notions of antimagic labeling with rainbow coloring. We consider a connected and simple graph G(V, E) with a vertex set V(G) and an edge set E(G). A vertex labeling of graph G is defined as a bijective function
...
Proceedings Article
Electrochemical Characteristics of the Nanocrystalline and Amorphous (Mg24Ni10Cu2)100 – xNdx (x = 0–20) Alloys
Y.H. Zhang, T. Yang, Z.M. Yuan, W.G. Bu, Z.H. Hou, Y. Cai, D.L. Zhao
The (Mg24Ni10Cu2)100–xNdx (x = 0–20) alloys are fabricated by vacuum induction melting and melt-spinning technique. The structures of the as-cast and spun alloys were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrochemical hydrogen storage performances...
Proceedings Article
Numerical equation for the mass stopping power of protons in human body subtances
Eko Sulistya, Arief Hermanto
Accurate determination of the protons energy in radiotherapy planning can be achieved if the stopping power of protons to specific body tissue are known. The Bethe-Bloch equation greatly aid the understanding of how to calculate the stopping power from the physics point of view, but not so practical...
Proceedings Article
Performance Improvement of Flexible Dye-sensitized Solar Cells by Addition of Larger TiO2 Particle as Scattering Layer
Lia Muliani, Mariya Q., Jojo Hidayat, Erlyta Septa
The performance of dye-sensitized solar cells (DSC) is affected by its components such as photoelectrode material, dye-sensitized, electrolyte, substrate and counter electrode materials. In this study, we investigated the effect the addition of larger TiO2 particle as a scattering layer to the TiO2 nanoparticle....
Proceedings Article
Characterization of the continuity of Δ-space via the convergence
Fan Feng, Qingguo Li
The concepts of Δ-convergence and ΔL-convergence of a net are introduced in Δ-space defined by Zhang et.al. The characterization of the continuity of the Δ-space is obtained in terms of the Δ-convergence of the nets. The result that the continuity of the Δ-space implies the ΔL-convergence being topological...
Proceedings Article
The Effect of Solar Power Generating in Low Voltage Network on the Quality of Electricity to Costumers Side, A Case Study 4 kWp Photovoltaic at Salt Storage
Afeef Kurnia Rahmawan, Mochammad Facta, Susatyo Handoko
Generating electricity using fossil fuels can increase global warming. To reduce the use of fossil fuels, the implementation of Renewable Energy becomes a choice. One example is a Photovoltaic (PV) installation connected to a grid. The addition of on-grid PV on the load side may provide an undesirable...
Proceedings Article
An Evaporative Coolant Used to ECR Ion Source
Lin Ruan, Shun-Zhou Yu, Bin Xiong
As a kind of high efficient cooling mode, the evaporative cooling technology has been successfully applied to a lot of engineering fields. This paper introduces a kind of evaporative coolant, for the first time, used to the ECR ion source. Firstly, we compared the basic physical and chemical characteristics...
Proceedings Article
Computational Analysis of Raindrop Radar Reflectivity and Radar Cross Section across Various Frequency Bands
T. Y. Ojebisi, J. S. Ojo, E. O. Olurotimi, M. O. Ajewole
This study presents a numerical investigation of radar cross-section (RCS) and radar reflectivity of raindrops using a modified generalized T-matrix method to model realistic non-spheroidal raindrop shapes. The RCS and reflectivity are computed across a range of frequencies for raindrops with radii between...
Proceedings Article
Development of Amperometric Biosensor Immobilized by Entrapment of Urease Enzyme in Polypiroll Film for the Determination of Blood Urea
Pratondo Busono
Accurate determination of blood urea concentration has gained a great clinical interest, especially for diagnosing kidney failure or lever malfunctioning. The biosensor can provide a fast response and accurate measurement about blood urea concentration. In this research, a method for fabrication of a...
Proceedings Article
Application of the Conjugate-Gradient Method for Analysing the Optimum Thrust Force for the Pico-Hydropower
Sunardi Sunardi, Jamrud Aminuddin, Wuryatmo Akhmad Sidik, Akmal Ferdiyan, Urip Nurwijayanto Prabowo, Zulkaida Akbar
A water thrust from the nozzle is the main factor for the optimizing of the pico-hydropower system. The previous study indicated that the optimal water trust resulting from the balance between the forebay tank and penstock pipe. The study of the balances has been conducted by governing of Bernoulli equation...
Proceedings Article
Fabrication of Chiral Poly(3,4-ethylenedioxythiophene) Derivatives Modified Glassy Carbon Electrodes for Ascorbic Acid Determination
L.Q. Dong, D.F. Hu, H. Sun, X.F. Zhu, K.X. Zhang, Y.S. Zhang, H.K. Xing, X.M. Duan
Two chiral poly(N-(tert-butoxycarbonyl)-Lphenylalayl (3,4-ethylenedioxythiophene-2'-yl)methylamide) (PEDOT-Boc-L-Phe) and poly(L-phenylalayl (3,4- ethylenedioxythiophene-2'-yl)methylamide) (PEDOT-L-Phe) were synthesized by electrochemical polymerization, and their properties as an immobilization platform...
Proceedings Article
Hidden Markov Based A Target Trajectory Tracing Algorithm
Ding-Jiu Yu
With static position feature of target, existing positioning algorithms can not track target trajectory well when the target is mobile. To solve this problem, a target trajectory tracking algorithm based on hidden Markov model is proposed in this paper. Firstly, a hidden Markov model is established according...
Proceedings Article
The Natural Rubber/Silica/Silane Composites: Study on Hardness, Tensile and Morphology Behaviours
Indra Surya, Sabri, Marpongahtun, Nabil Hayeemasae
Applying a favorite semi-efficient method, the influences of a typical silane coupling agent, named aminopropyltriethoxy Silane (APTES), on morphology, hardness, and tensile strength behaviors of the natural rubber/silica composite were examined. As a natural-based rubber, the natural rubber (NR) was...
Proceedings Article
Study on Polycarbosilane Fibers Cured by Thermal Process and Electron Beam Irradiation
Jan Setiawan, Pranjono Pranjono, Ryan Saptaaji, Suyatman Poertadji, Sigit Sigit
A non wovenpolycarbosilane (PCS) fibers was successfully produced by electrospinning and processed by a thermal curing and electron beam curing. PCS solution composition was 1.2 g/ml PCS with 30% N,N-dimethylformamide (DMF)/70%toluene and the applied voltage at 10 kV in spinning process. The PCS fibers...
Proceedings Article
The Potential of htrA Gene to Identify Enterococcus faecalis using real-time Polymerase Chain Reaction
Irma Ratna Kartika, Grace Grace, Ananda Indah Putri Sihombing, Agus Setiawan, Anisa Fitriyanti, Helzi Angelina, Gusti Angieta, Puan Aqila Azizah, Royna Rahma Musie, Jefferson Lynford Declan, Gladys Indira Putri, Siti Fatimah, Ayu Berkahingrum, Muktiningsih Nurjayadi, Fera Kurniadewi, Bassam Abomoelak, Hesham A. El Enshasy
Enterococcus faecalis is known as the opportunistic pathogens that can cause a variety of diseases. These bacteria are capable of producing enterotoxins that lead to gastrointestinal symptoms. This study aims to develop a real-time Polymerase Chain Reaction (PCR) method that is more efficient for identifying...
Proceedings Article
Composition and Quantity of Volatile Organic Compounds in Paper Mill
X. Tong, W.H. Shen
This paper analyzed volatile organic compounds (VOCs) in the ambient air of a secondary fiber paper mill. The compositions and quantities of VOCs were determined by the gas chromatography-mass spectrometry (GC-MS) method and the photo-ionisation detector (PID), respectively. The total concentrations...
Proceedings Article
Development of an AI-Enabled Raspberry Pi Robot for Monitoring and Combating Illegal Logging Activity
Ayobami O. Adedokun
Preserving natural ecosystems and biodiversity is crucial for fostering a fair and equitable society, promoting economic functionality, and securing a sustainable future. However, illegal logging activities recently in Nigeria have been posing a significant threat to the forests, the natural environment,...
Proceedings Article
Forecasting Short-Term Electrical Loads Using Support Vector Regression with Gaussian Kernel Functions
La Ode Muhammad Yusuf, Susatyo Handoko, Iwan Setiawan
Power outages that sometimes still occur cause disruption of economic activity around the area, especially the city of Bau-bau, it is necessary to forecast the electrical load in order to determine the characteristics of the electrical load in the area. Short-term electrical load forecasting is used...
Proceedings Article
Vibration Measurement Instrument Design Based on Fluxgate Sensor for Early Warning of an Earthquake Disaster
Yulkifli Yulkifli, Syafriani Syafriani, Dewi Sidiq, Rahadi Wirawan
Earthquake phenomena can be observed and monitored using the presence of vibration. In order to monitor the vibration, fluxgate sensor can be applied based on magnetic flux change. In this research, a vibration measurement instrument based on the fluxgate sensor for an earthquake monitoring application...
Proceedings Article
Pythagorean Theorem for Solving Simple RLC Circuit Problems
Bambang Supriadi, Shinta Nuriyah Mahbubiyah Royani, Achmad Agung Tri Nanda, Eti Elisa, Elsa Munawarotul Jannah, dan Maryani
A simple solution to solving the problem of alternating current circuit materials. Alternating current circuit material is a material that has many mathematical equations and depends on the type of circuit combination. The combination of circuits on alternating current material is RC, RL, LC, and RLC...
Proceedings Article
Was the Pesawaran Swarm Induced by Magmatic Fluids? Insight from Magnetic Method Analysis
Yudha Styawan, Izaina Nurfitriana, Rizky Wulandari
An earthquake swarm in January 2021 triggered research related to adjacent geological structures, mainly inferred Menanga fault having predicted in the previous studies. This study is focused on investigating the fault and volcanic -related activity in terms of magnetic field anomalies due to sensitivity...
Proceedings Article
GC/MS Method for Detecting 8 Kinds of Pesticide Residues in Organic Vegetables
D. Wang, J.Z. Zhao, D. Liang
Objective to established a gas chromatography mass spectrometry method for the determination of the 8 phosphorus and carbamates pesticide residues in organic vegetables. The vegetable sample was homogenate, after the extraction of acetonitrile. The detection of the GC/MS was carried out by solid phase...
Proceedings Article
Iron-based Powder Metallurgy Steel Collar Chemical Treatment Process Test
Kang-Cheng Dong, Ming-Zhu Li
The steel collar is an important part of textile machine, which not only requires good abrasion resistance, but also have more stringent requirements for ovality and irregularities, as shown in Figure 1. Generally low carbon steel collar is carburized (or carbonitrided) after quenching to increase its...
Proceedings Article
The Strength and Reinforcement Behaviors of Styrene Butadiene Rubber-Silica Compound with Oleamide as Palm Oil-Based Rubber Additive
Indra Surya, Sabri, Marpongahtun, Nabil Hayeemasae
In the application of a semi-efficient method for the rubber compounding and vulcanization, the study on the effects of oleamide addition, as a rubber additive, on the strength and reinforcement behaviors of styrene butadiene rubber (SBR)-silica compound was carried out. The oleamide was synthesized...
Proceedings Article
Cow Cement Sensor Based On Coil - Resistance Temperature Detector (C-RTD) Coupled with Four Wire Configuration Bridge (4-WCB)
Moh. Toifur, Bagus Haryadi, Riswanto Riswanto
Low Temperature Detection System on cow cement flask base on RTD-coil coupled by transducer 4-WCB has been made. Four kinds of sensor was prepared, that’s are coils from copper material with diameter 1 mm and set number of winding from 200 up to 500. Four-WCB circuit was chosen as transducer to facilitate...
Proceedings Article
Synthesis o f Ti2N Powders by Vacuum Slowly Vapor Deposition Using Urea as Nitrogen Source
J.F. Sun, S. Yan, H. Yu, K. Quan
Hydrochloric acid solution of TiCl3 was synthesized by reacting of Ti powders and hydrochloric acid in highpressure reactor at 145 . After vacuum drying TiCl3·6H2O crystalline were obtained. TiCl3·6H2O crystalline and urea, being as nitrogen source, were put into the vacuum slowly vapor deposition reactor....
Proceedings Article
Study on Microstructure and Properties of Surface Composition with Steel Matrix
Li-Xiao Jia, Hong-Yan Yan, Qing-Feng Zhang
With the traditional casting Penetration technology, high chromium cast iron composite layer has been formed on the surface of low carbon steel. The microstructure and Properties of cast Penetrating layer has been also studied. The test result has shown that the average microhardness of cast penetrating...
Proceedings Article
On G-decimal Representation over Function Fields
Hong Ziwei, Zheng Zhiyong
This paper discusses decimal representation over function field k∞. Firstly, we provide definitions and establish existence of decimal representation over function fields. For function field k∞, The work of L. Carlitz demonstrates that for the function field
...
Proceedings Article
Identification ofCalcium Carbonate (CaCO3) Characteristics from Different Kinds of Poultry Eggshells Using X-Ray Diffraction (XRD) and Fourier Transformation Infra-Red (FTIR)
Musrifah Cahya, Nuun Marfuah
Initial studies have been conducted to study the properties of calcium carbonate (CaCO3) from a wide range of poultry such as domestic chicken eggshell, Chicken Broiler egg shell, duck egg shell and quail egg shell. This initial study was conducted to determine whether the initial identification of a...
Proceedings Article
A Study on Nutrient Properties and Heavy Metal Concentrations of Waste Activated Sludge Derived from Municipal and Small Town Domestic Sewage Treatment Plants
X.K. Sun, Y. Huang, X. Dong, C.B. Xu, J. Bai
In order to better understand land application of sewage sludge, the nutrient properties and heavy metal concentrations in sewage sludge were investigated from two different wastewater treatment plants in China. The results show that the OM contents were significantly different between Shenyang domestic...
Proceedings Article
The Effect of TiO2 Film Immersion Duration in N719 Dye on Microstructure, Optical Properties, and Photoanode Performance of Photosupercapacitors Based FTO/TiO2/N719/Activated Carbon/Carbon Black
Markus Diantoro, Ida Vaeruza Albadi’ah, Nasikhudin
Photosupercapacitor (PSC) is integrated harvesting (DSSC) and storing energy (supercapacitor) simultaneously. The increase in DSSC performance is studied through an effect of TiO2 film immersion duration on the N719 dye, which has not been investigated so far. Furthermore, the effect of stacking configuration...
Proceedings Article
Oil Content and Free Fatty Acid Prediction of Oil Palm Fresh Fruit Bunches Using Multispectral Imaging and Partial Least Square Algorithm
Minarni Shiddiq, Roni Salambue, Zulfansyah Zulfansyah, Jahrizal Jahrizal, Ikhsan Rahman Husein, Sinta Afria Ningsih, Galef Alfahrezi
Multispectral imaging has many applications in agriculture, such as the prediction of the internal qualities of fruit and vegetables. Multispectral is preferable to Hyperspectral imaging for fast in-line sorting and grading machine vision due to fewer wavelength bands applied. Oil palm fresh fruit bunches...
Proceedings Article
Absorption of Sulfur Dioxide in Ionic Liquid Supported on Porous Silica Particles
X.L. Zha, J. Xu, W.F. Yu
1, 1, 3, 3-tetramethylguanidinium lactate (TMGL) has been studied for SO2 removal. However, before using industrial scale application, several problems need to be solved, for example, the influence on SO2 absorption at high temperature. This work investigates the SO2 sorption of the 1, 1, 3, 3-tetramethylguanidinium...
Proceedings Article
Photosensitive Hyperbranched Aliphatic Polyester Based on 2,2-dihydroxymethyl Butyric Acid
Fei Cao, Li-Juan Zhang, Ling-Ling Ma, Meng-Meng Zhou, Jing Du, Ji-Jun Xiao
A new kind of photosensitive polyester based on the hyperbranched aliphatic polyesters has been investigated. The hyperbranched aliphatic polyesters (polymer A) with 0.69 of the degrees of branching (DB) was prepared from 2,2-dihydroxymethyl butyric acid. Followed by end-modified with maleic anhydride...
Proceedings Article
Effects of Temperature on Radio Duct Propagation in Selected Coastal Areas of Nigeria
A. T. Adediji, A. P. Iwaotan
Meteorological parameters of air temperature, relative humidity, and atmospheric pressure at the ground surface and 950 hPa pressure level at 09:00 LT obtained from the archive of European Centre for Medium-Range Weather Forecasts (ECMWF) Re-analysis ERA-Interim were used to compute modified radio refractivity...
Proceedings Article
Structural and Dielectric Properties of Yttrium doped Multiferroic Bismuth Ferrite (Bi1-xYxFeO3, x = 0, 0.18) Synthesized by Sol-gel Method
Suharno Suharno, Muhammad Hikam, Bambang Soegijono, Moh. Toifur
Pure and Y-doped BiFeO3 have been synthesized by sol–gel method. the gel have been heated at 150°C for 3 h, the low-temperature heating treatment was given to obtain uniform, homogenous, and smaller size. The crystal BiFeO3 have been found after dried and grounded followed by calcination at 750°C for...
Proceedings Article
The Relationship between Nutritional Knowledge with Food Attitudes on Post COVID-19 Pandemic among High School Adolescents
Yulilina Retno Dewahrani, Saidah Linaili Rahmah, Sri Rahayu
Knowledge of nutrients is essential for adolescents to maintain optimal body function and prevent various health issues. The nutritional knowledge taught to high school students plays a crucial role in empowering high school students to make informed decisions about their health including food choice...
Proceedings Article
Transmission Coefficient of Triple Potential Barrier Combination Structure Using Two-Dimensional Schrodinger Equation
Bambang Supriadi, Tamara Pingki, Hana Mardhiana, Nurul Faridah, Elma Tri Istighfarini, Subiki
Electronic devices that are made from semiconductors have made a lot of progress in the size of basic components that are more practical and effective, meaning that the size is getting smaller with greater data storage. The progress of these electronic devices cannot be separated from the tunneling effect...
Proceedings Article
Effect of Filtration Type on BSA Fouling with PVB Hollow Fiber Membrane
M. Zhang, Y.R. Qiu
Hydrophilic poly (vinyl butyral) (PVB) hollow fiber membranes prepared via thermally induced phase separation(TIPS) were used for the filtration of bovine serum albumin (BSA)suspension, and the effect of filtration type on the BSA fouling of the membrane was studied. The results show that compared inside-out...
Proceedings Article
Moments and non-vanishing of central values of quadratic Hecke L-functions in the Gaussian field
Peng Gao
We evaluate the first three moments of central values of a family of quadratic Hecke L-functions in the Gaussian field with power saving error terms. In particular, we obtain asymptotic formulas for the first two moments with error terms of size O(X1/2+ε). We also study the first and second mollified...
Proceedings Article
Effect of the EM Immobilized Technology on Nitrogen Dissolution Characteristics of Aquaculture Sediment
Long Wang, Ya-Lu Shao, Xin-Yu Mao, Xiao-Hou Shao, Qi-Jin Wu
Effect of nitrogen dissolution characteristics of pond sediment by the immobilized EM technology was studied by the indoor simulation experiments in this paper. The results showed that ammonia nitrogen was the main forms of inorganic nitrogen dissolved from the sediment. The release of ammonia nitrogen...
Proceedings Article
Effect of Thermal Treatment and Relative Humidity on The d-spacings of Poly(ethylene glycol) Montmorillonite Nanocomposites
Khairuddin Khairuddin
The effect of temperature and relative humidity on the d-spacing of montmorillonite (MMT) clay in Poly(ethylene glycol) Mw 600 (PEG600) nanocomposites prepared by solution casting has been investigated, since it can be significantly affected by any associated water. X-ray diffraction (XRD) traces were...
Proceedings Article
Rules of Ozone Generation Induced by Yellow Phosphorus
L. Zhang, Y.H. Qin, C.X. Nie, B.Z. Chen
The rules of ozone generation produced by yellow phosphorus and oxygen were carried out by single-factor experiments in this article. The results showed that with fixed yellow phosphorus concentration (2 g L-1) and oxygen volume percentage (10 %), the rate of ozone net generation reaches a maximum of...
Proceedings Article
Hybrid Particle Swarm Optimization-Fuzzy Inference System for Premature Atrial Contraction Detection
Nuryani Nuryani, Iwan Yahya, Anik Lestari
This article presents a new technique to detect a premature atrial contraction (PAC). The technique employs a hybrid of particle swarm optimization (PSO) and fuzzy inference system (FIS), and is called PSO-FIS. In the detection electrocardiographic features are used for the inputs of PSO-FIS. In PSO-FIS,...
Proceedings Article
Microwave Synthesis of Cu, Fe-doped TiO2 and Its Application for Photocatalytic Degradation of Organic Wastewater
Deng-Feng Wu, Cong-Sen Wang, Xue-Hong Liao
In this paper, Cu2+ and Fe3+co-doped titanium dioxide nanocomposite was prepared by iron nitrate, copper nitrate and titanium sulfate as raw materials and sodium dodecyl sulfate as surfactant under microwave irradiation. The x-ray diffraction (XRD) results show that as-prepared sample of direct adding...
Proceedings Article
Central Java Natural Condition for Agrivoltaic System Development
Danang Hendrawan, Iwan Setiawan, Susatyo Handoko
With population growth which increases every year, it will also be accompanied by a reduction in natural resources and energy. These natural resources are in the form of food needs. With the increasing demand for food and energy needs, there must also be the development of technology in the field of...
Proceedings Article
On Local (a, d)-Antimagic Coloring of Some Specific Classes of Graphs
Fadlila Putri Almaidah, Dafik, Arika Indah Kristiana, Robiatul Adawiyah, Rafiantika Megahnia Prihandini, Ika Hesti Agustin
For any graph
G
=
(
V
,
E
)
, the vertex set V and the edge set E, and let w be the edge weight of graph G, with
...
Proceedings Article
Automated Irrigation and Fogging System with Temperature predictive Capability for Greenhouse Farming
Olugbenga Kayode Ogidan, Isaac Elesemoyo, Hasan Babalola
Farmers in sub-Saharan Africa are plagued with the challenges of climate change, farmers-headers clash, resulting in low production. Greenhouse farming is seen as a way out due to small space required and ability to control microclimate. Tropical Greenhouses are usually very hot in the afternoon resulting...
Proceedings Article
The Microstructure and Performance of Coal-Based Activated Carbon in Symmetric Supercapacitors as Affected by Activation Temperature and ZnCl2 Concentration
Markus Diantoro, Rizka Ramadhani Maisyarah, Ishmah Luthfiyah
Supercapacitors are gaining much attention as electrochemical energy storage for their fast charging rates, high power density, good cycle performance, quicker charge-discharge, longer device life, and abundant materials. According to the storage mechanism, supercapacitors are divided into 3 types; EDLC...
Proceedings Article
Research on Esterification Reaction of Gutter Oil with Supported Acid Catalyst
Y.C. Zhao, Y. Wang, M.H. Qu, F. Ouyang
Active component -SO3H of activated carbon loaded catalyst is prepared by carbide sulfonation reaction between concentrated sulfuric acid and glycerol. And effects of different reaction conditions were studied on the basis of the reduce ratio of acid value after the esterification reaction occurred in...
Proceedings Article
Study of EHD Flow Produced by Pin-Dual Ring Concentric Electrodes Generator
Sumariyah Sumariyah, Zaenul Muhlisin, Evi Setiawati
The aim of this research is study of Electrohydrodynamic (EHD) flow by discharge corona generator with electrodes configuration of Pin- Dual Ring Concentric. We measured the velocity of EHD flow with electrodes configuration of Pin- Dual Ring Concentric and compare the result to Pin-Single Ring electrodes....
Proceedings Article
Infrared Sights Zero Momentum Measurement Technology based on Camera Adaptive Algorithm
Jin-Song Wang, Dan Hu, Yan-Feng Li
According to the high precision testing requirements on aiming at the baseline variation of infrared sight, a measuring method of infrared sight zero momentum based on camera pose adaptive mathematical model is proposed. A new adaptive algorithm of camera pose is designed. A camera pose correction model...
Proceedings Article
Research on Performance of High-temperature High-density Oil-based Drilling Fluids
C. Ma, L. Li, J. Zhang, R.C. Cheng, G. Wang, Z. Zhang, X. Liu
The oil-gas exploitation techniques of super-deep formations in West China are facing a great challenge. Due to the super-high temperature, high pressure, salt formation, it brings enormous challenge to drilling engineering. To meet the need of drilling operation in the super-deep formations, a new kind...
Proceedings Article
Optimizing Students’ Mathematical Visual Thinking Through Graphing Quadratic Worksheets: A Rasch Modeling Approach
Ria Noviana Agus, Rina Oktaviyanthi, Usep Sholahudin
This study aims to develop a detection model and optimization strategy for enhancing mathematical visual thinking skills using graphing quadratic work-sheets through the Rasch Modeling approach. Data were collected from students completing worksheets designed to assess three key aspects of visual thinking:...
Proceedings Article
Characterization of Solar Cells Based Natural Chlorophyll and P3HT Polymer
Agus Surpyanto, Fahru Nurosyid, Yofentina Iriani, Kuwat Triyana, Ari H. Ramelan
Characterization of organic solar cells based organic material and polymer using natural chlorophyll and P3HT have been investigated using current-voltage (I-V) Keithley 2602 instrument. Chlorophyll is extracted from Spirulina sp by column chromatography method. It is found that the absorbance spectra...
Proceedings Article
Study of Industrial Liquid Waste Pollution Using Geoelectrical Method in Sukaregang, Garut, West Java
Sasqia Nurul Fauziah, Nurhasan, Sofiana Herman, Randi Rusdiana, Howard Situmoran, Syamsul Hidayat
The rapid development of industry causes more and more waste to be produced and can lead to pollution. One of those is the pollution of the leather tanning industry in Sukaregang, Garut, West Java. Tannery waste is disposed of directly into the river area. Seepage of waste below the surface from river...
Proceedings Article
Prediction of Reservoir Temperature for the Tianjin Geothermal Field, Bohai Bay Basin, China
Y. Pei
Reservoir temperature is a key parameter for genesis analysis, potential evaluation and research of waterrock interactions of geothermal systems. It is necessary to identify the suitable geothermometer for a certain geothermal field for better characterization of the geo-temperature field. In this paper...
Proceedings Article
Experimental Study on Compressive Strength of Manufactured Sand Concrete
Sheng-Dong He, Hua Wang, Lei Li
Compressive strength is one of the important mechanical properties of conerete, and the indicator of compressive strength of manufactured sand concrete is more important to be promoted. This paper presents the results of the compressive strength tests on concrete specimens using the manufactured sand,...
Proceedings Article
Effect of Pre-Strain on The Longitudinal Residual Strain of Dissimilar Metal Welded Between Stainless Steel and Carbon Steel
Susilo Luhur, Triyono Triyono, M. Refai, Nurul Muhayat
Welding process is generally used in manufacturing industry. It usually produces distortions in the weld metal. To reduce distortion, one of the methods used is the pre-strain. This study aims to determine the effect of pre-strain during welding process on the residual strain of dissmilar metal weld...
Proceedings Article
Effects of Ionospheric Delay on the Position Accuracy of GNSS Receiver: A Case Study at Burdwan University, India
Adewumi Adebayo Segun, Sukabya Dan, Rajkumar Mandal, Anindya Bose
The effects of ionospheric delay (ionodelay) on the positioning accuracy of GNSS receivers at the University of Burdwan, India are presented. One (1) Hz dual-frequency GPS constellation data were logged for 24 h each day for a few days during the autumn season in October 2022 and the spring season in...
Proceedings Article
Study on Compressive Strength and Moisture Content of Different Grades Density of Foam Concrete
Wen-Wu Long, Jing-Song Wang
Influences of curing period and dry density on Moisture content and compressive strength were investigated through eight different densities of foamed concrete be in 650 kg/m³ to 850 kg/m³. The research results show that foam concrete in same age stages with increasing dry density, compressive strength...
Proceedings Article
A Simple Digital Calorimeter as Practicum Innovation Based on W1209 Thermostat Module
Rika Ratnasari, Aris Doyan, Susilawati, Muhammad Faris, Moammar Qadafi, Ulfah Nurkhaeroni, Via Monica Devi, Istiqomah, Ferniawan, Bung Ashabul Qahfi, Baiq Fitri Rahmayanti
A calorimeter is an instrument used to measure the amount of heat transferred to or from an object. The calorimeter used in schools is analog. The data obtained is less accurate, and students have difficulty interpreting the data. This research aims to create a simple digital calorimeter practicum tool...
Proceedings Article
The Problems and Countermeasures of Cathodic Protection Accepatnce of The Yili River Crossing by Horizontal Directional Drilling Method
W. Fu, X.Y. Zheng, Z.L. Zhang, Y.Z. Liao, J.J. Li, S.S. Chen
This paper aims at the problems and countermeasures of cathodic protection acceptance of the Yili River crossing project by horizontal directional drilling (HDD) method, addressing the performability of the acceptance criteria using polarization potential offset of not less than 0.7V required by the...
Proceedings Article
A Note on Grid-Type Directed Acyclic Graph for Important Property of Resource Allocation Problem
Mochamad Nizar Palefi Ma’ady, Tabina Shafa Nabila Syahda
We consider the following resource allocation problem on a directed acyclic graph (the precedence graph). Suppose we have a given X units of a resource that must be distributed among N activities with some of given return functions ri(x). The problem is to allocate all of the X units of resource to the...
Proceedings Article
Uncertainty in Estimation of Anthropogenic Aerosol Indirect Effect
X.J. Shi, X.F. Zhi
In this paper, uncertainties in estimating anthropogenic aerosol indirect effects on warm clouds are explored using the recently developed Grid point Atmospheric Model (GAMIL) with prescribed aerosol fields. The anthropogenic aerosol indirect effect is calculated by the change in shortwave cloud forcing...
Proceedings Article
Synthesis of Indium Oxide (In2O3) Nano Particles Using Sol Gel Method as Active Material on Gas Sensor
Slamet Widodo, Nanang Sudrajat
Synthesizing of indium oxide (In2O3) nano particles using sol-gel process as an active sensing material of gas sensor has been carried out. As starting material, indium acetate/In(CH3COO)3 was dissolved in diethylene glycol and heated up at 1300C until homogeneity is achieved. Nitric acid (HNO3) was...
Proceedings Article
Land Subsidence Analysis Based on 2D Resistivity Modelling of DC Resistivity Method in Curugpanjang, Banten
Syamsul Hidayat, Nurhasan, Enjang Jaenal Mustopa, Dini Fitriani, Randi Rusdiana, Howard Situmorang, Sasqia Nurul Fauziah
Land Subsidence is a phenomenon of subsidence of the land surface compared to the reference point. This phenomenon can be caused by natural factors, groundwater extraction, and building factors. Geoelectrical method was used to analyze the subsurface conditions in Curugpanjang consisting of four lines....
Proceedings Article
Establishing and Optimizing AFLP Amplification Reaction System of Shiraia Bambusicola
Bing Yang, Yi-Meng Chen, Yong-Xiang Liu, Zuo-Yi Liu, De-Qun Zhou
DNA of Sharaia bambuiscola was extracted by the improved method of CTAB. The several key factors affecting the effect of DNA digestion and the PCR selective amplification such as the time of DNA digestion, the times of the per-amplified dilute products, the mount of the selective amplification primer,...
Proceedings Article
PPP Potential of a Compact, Low-Cost GNSS Receiver’s Module in a Low Latitude Region: A Case Study at the Lautech GNSS Laboratory, Nigeria
Adewumi Adebayo Segun, Àlàgbé George Atilade, Azeez Ibraheem Abiodun, Ayantunji Gbenro Benjamin, Ogobor Efua Anthony, Oyelowo Oluwadara, Fajobi Iyinoluwa, Eleyele Dolapo Emmanuel
Precise point positioning (PPP) for global positioning systems (GPS) is being utilized for many scientific and commercial applications, and the Global Navigation Satellite System (GNSS) world is quite excited about it. With the PPP technique, the GNSS can accurately determine the geolocation of any point....
Proceedings Article
Benzothiazole Derivative Accelerates Excretion of Total Sterols in Long-Term High Fat Fed C57BL/6J Mice
Y. Yu, H. Jiang, J.L. Ao, H. Wang, E.B. Hua
Benzothiazole derivative (BD): [N-(3-(benzothiazol- 2-yl) phenyl)-1H-pyrazole-3-carboxamide] was tested for excretion of total sterols of high-fat diet fed C57BL/6J mice in view of lipid metabolism. The results showed that BD as supplementation of high-fat diet significantly improved the output of cholesterol...
Proceedings Article
Developing Higher-Order Thinking Skills in Mathematics Learning through Challenging Mathematical Task: A Single Subject Study on Gifted Students
Kadir Kadir, Dedek Kustiawati, Hania Rahmah
This research aims to analyze the higher-order mathematical thinking skills of gifted students before, during, and after being given challenging mathematical tasks. This research was conducted at a State Madrasah Tsanawiah in Depok City. This study used a single-subject research design (A-B-A). The subjects...
Proceedings Article
Android Learning Design to Increase Interest in Learning Music
Erlando Doni Sirait, Puput Irfansyah, Aan Risdiana
This present research develops an android-based learning design to increase interest in learning music. Technology that has penetrated education can be used as an alternative to achieve learning goals. Music, as one of the lessons taught in school, can help students to increase their creativity. However,...
Proceedings Article
Minimizing Risk of Accidents by Selecting Reverse Delete Fuzzy-FMEA Route
Rifki Ilham Baihaki, Rosanita Nisviasari, Dafik, Ika Nur Maylisa, Ika Hesti Agustin, Valeriana Lukitosari
Roads are often used to travel from one place to another. To shorten the trip, it is usually done via the shortest route. Choosing the shortest route cannot be separated from the risks that can occur, such as accidents. Risk management serves to minimize this from happening. Analysis of the feasibility...
Proceedings Article
Design and Simulation Fuzzy Neuro Generalized Learning Vector Quantization-PI (FNGLVQ-PI) on Field Programmable Gate Array (FPGA)
Ricky A. Daniel, M. Anwar Ma'sum, Grafika Jati, Wisnu Jatmiko
Classification is a machine learning technique that used widely for various applications. One of the classification algorithm is FNGLVQ that can be used to solve several types of classification problem in previous research. On the other side, Field Programmable Gate Array (FPGA) is an instrument currently...
Proceedings Article
The Biological Behavior of Osteoblast on the TiO2 nanotube array coating
X.G. Shi, A. Tian, H. Yang, X.X. Xue
TiO2 nanotube arrays formed by anodic oxidation on titanium surface can effectively promote osteoblast’ migration, proliferation and other biological behavior, and it has potentials of loading drugs and biological agents. In this study, TiO2 nanotube arrays with different diameters were prepared by anodic...
Proceedings Article
Development of a Mini-Weather Station for an Automated Irrigation System Operation
Olugbenga Kayode Ogidan, Samuel dare Oluwagbayide, Omowunmi Mary Longe
The use of inadequate water during irrigation results in water stress for the crops while too much water results in nutrients’ leaching both leading to poor crop yield. To address these challenges, a mini-weather station using weather data from an irrigation site is developed. A data acquisition system...
Proceedings Article
The Preparation and Fluorescence of Conjugated Polymer Nanoparticles with Triphenylamine Derivatives
Yue-Hong Zhu, Xian Zhang, Yuan-An Qin, Zhao-E Liu
The conjugated polymers TEB1 and TEB2 were synthesized by Wittig and Wittig-Horner reaction, and the conjugated polymer nanoparticles CPNs1 and CPNs2 were prepared by reprecipitation method with TEB1 and TEB2, respectively. Moreover, the morphology and fluorescence of CPNs were investigated. The synthetic...
Proceedings Article
Electrodeposition of Cobalt on the Carbon Surface from Cobalt Sulfate Solution by Cyclic and Linear Voltammetry in Developing Selective Electrodes for Phosphate Ion
Siswoyo Siswoyo, Istimahillah Mawaddah, Yudi Aris Sulistiyo
Phosphorus in nature is very important both in water and in soil. The form of the compound phosphate has become an important study in agriculture and the environment. Potentiometry is a recommended effective method to measure or monitor ion phosphate’s concentration in nature compared to the spectrometric...
Proceedings Article
Solubility, Free Amino and Freeze-Thaw Stability of Soy Protein Isolated Prepared by Papain Modification
M.J. Liu, G.P. Yu, Y.X. Yao, P.P. Guo, W.W. Qi, X.H. Cai
Peptide size control is important for obtaining desirable functional properties so that these peptides can be better utilized. Proteolytic enzyme modification of soy protein isolates (SPI) is an effective way to fractionate these proteins into peptides with controlled molecular size. SPI was partial...
Proceedings Article
2D Set Partitioning In Hierarchical Tree (SPIHT) On Embedded Devices For Multilead ECG Signal Compression
Grafika Jati, M. Anwar Ma'sum, Wisnu Jatmiko
Heart disease is the number one cause of death in the world according WHO data. One of the mayor cause is the lack of cardiologists. One of the proposed solution is tele-electrocardiograph (Tele-ECG) system. However, the sizeof ECG data recorded from patient is not small. Therefore, it must be compressed...
Proceedings Article
Pre-service Elementary Teachers: Analysis of Mathematics and Physics Concepts with Traditional Games in Sundanese Ethnomathematics Learning
S. Supriadi, F. Robiansyah, D. Wardana, S. Susilawati
Endog-endogan and engklek are traditional games used in Sundanese ethnomathematics learning. This game has many mathematics and physics ideas for elementary school teacher education students to explore and apply in lectures and science. This research goal is to discover the ideas of mathematics and students’...
Proceedings Article
Rosemary Extract Mediated Lifespan Extension in Drosophila Melanogaster
H.L. Wang, Z.S. Zhang, Z.O. Sun, H. Wang, N. Ma, H. Wang
Rosemary (Rosmarinus officinalis L.) has always known a versatile, aromatic herb and addition to being used as a food flavoring is also known medicinally for its powerful antioxidant activity, antibacterial and hepatoprotective properties. In this study we examined the effects of rosemary iextract on...
Proceedings Article
Diffusion Bonding of Magnesium Alloy (AZ31B) to Cu by Using Sn Foil Interlayer
Shuang-Ming Du, Jie Hu
The experimental investigation of diffusion bonding of magnesium alloy (AZ31B) to Cu in vacuum was carried out by using Sn foil as transition metal. The microstructure of the welded joints was studied by SEM, EDS, XRD and the mechanical properties of the samples were tested by tensile experiments. The...
Proceedings Article
Seasonal Modelling of Radio Refractivity in Jos, Nigeria
O. M. Durodola, O. E. Samuel, D. O. Nnaike, E. E. Gideon
The refractivity of the lower atmosphere is responsible for several anomalies in microwave propagation such as ducting, scintillation, refraction, fading, including range and elevation errors in radar and data acquisition. It is needful to develop models which could be used to predict refractivity. In...
Proceedings Article
The Effect of Magnetcic Field on the Phase Transition of Swollen Liquid Crystal Elastomers
Warsono Warsono, Pekik Nurwantoro, Kamsul Abraha
The effect of magnetic fields on the swelling of liquid crystal elastomers (LCE) dissolved in liquid crystal (LC) solvent have been studied. The Flory-Huggins model used to calculate the free energy of an isotropic mixing and the Maier-Saupe model used to calculate the free energy of a nematic mixing....
Proceedings Article
A Conceptual Framework of the Ethno-Inquiry Learning Model and Its Validity to Support Pre-service Science Teachers’ Critical Thinking Performance
Saiful Prayogi, Sukainil Ahzan, Indriaturrahmi, Joni Rokhmat
The purpose of this study is to create a conceptual framework for the ethno-inquiry learning model and determine its validity in supporting pre-service science teachers’ critical thinking ability. The conceptual framework is constructed on an in-depth study of theoretical and empirical studies, information...
Proceedings Article
Construction and Functional Analysis of Luciferase Reporter Plasmid Containing CaV1.2 Gene Promoter
M. Li, H.Q. Gong, J. Zhang, N. Wang, T.C. Zhang
L-type Ca2+ channels (LTCCs) are the main mediators of Ca2+ influx. LTCCs are multi-subunit complexes, of which CaV1.2 subunit forms the channel pore for Ca2+ movement. Ca2+ influx through LTCC CaV1.2 is a proximal signal for pathological cardiomyocyte hypertrophy. However, very little is known regarding...
Proceedings Article
The Preparation of ZnO/AC Composite Photocatalytic Material for Coking Wastewater Treatment
Yan-Fen Wang, Xiu-Qian Dai, Chu-Yang Xu, Meng-Ting Li
A simple and low-temperature method was utilized to attach nanostructured ZnO to the surface of porous activated carbon (AC). The phase structure and surface morphology of the as-prepared sample were characterized. XRD analysis confirmed patterns for the wurtzite hexagonal phase of ZnO and AC from the...
Proceedings Article
Small-Scale Farmers’ Decisions to Purchase Subsidized and Non-subsidized Fertilizers: A Logistics Regression Analysis
Ahmad Zainuddin, M. Rondhi
Fertilizer is becoming a big subject among small farmers. Due to a lack of fertilizers, small-scale farmers have been obliged to purchase both subsidized and unsubsidized fertilizers. This issue has effects on farmers’ decisions to purchase fertilizers that are subsidized or not. This study intends to...
Proceedings Article
Design and Control System of Acidity Degree and Dissolved Oxygen Levels in Aquaponic Systems
Putri Yeni Aisyah, Fadiya Rofilia
The inhibiting factors for plant and fish growth in aquaponics systems are farmers who never control and monitor the quality of Dissolved Oxygen (DO) levels and the degree of acidity/Power of Hydrogen (pH) of water properly. Uncontrolled and monitoring of the quality of pH and DO in water properly and...
Proceedings Article
Combining Problem-Based Learning and Collaborative Mind Mapping: A Strategy for Empowering Students’ Collaboration Skills
Fitrah Amalia Salim, Susriyati Mahana, Hendra Susanto
Collaboration skills are becoming increasingly important for students to effectively solve complex problems in the 21st-century learning era. The purpose of this study is to examine the effect of Problem-Based Learning (PBL) combined with Collaborative Mind Mapping (CMM) on enhancing students’ collaboration...
Proceedings Article
Effect of Cryogenic Treatment on Film-substrate Bonding Strength of DLC Film/High-speed Steel
Yang Zhao, Chao-Yin Nie, Yan-Zhong Nie, Xiao-Dong Liu, Xiao-Ling Gong
In order to investigate the effect of cryogenic treatment (CT) on film-substrate bonding strength, 2µm thick DLC film was deposited on quenched W9 high-speed steel by unbalanced magnetron sputtering technique followed by CT at -196 for 30 hours. Samples before and after CT were characterized respectively...
Proceedings Article
Construction and Functional Analysis of Luciferase Reporter Plasmid Containing GSNOR Gene Promoter
D.L. Zheng, X.H. Liao, Z.Q. Wei, F. Du, H.P. He, T.C. Zhang
S-nitrosoglutathione (GSNO) is a nitrosylating agent which mediates the posttranslational process of Snitrosylation on proteins resulting in modulation of their activity. GSNOR (S-Nitrosoglutathione reductase) is an enzyme related to GSNO degration, which has been used extensively in controlling S-nitrosylation...
Proceedings Article
Machine Learning-Based Prediction of Path Attenuation Coefficient for Terrestrial FSO Link: Northern Cape, South Africa
O. B. Aborisade, J. S. Ojo, P. Owolawi, K. D. Adedayo
Free Space Optics (FSO) has garnered a lot of attention in recent years for the transmission of optical signals due to its perceived advantages such as ease of deployment, license-free, and high throughput. However, its performance is impacted negatively by meteorological parameters such as haze, snow,...
Proceedings Article
Synthesis of Carbon Microspheres from Saccharides Based on Hydrothermal Process
S.J. Xu, Y.F. Luo, W. Zhong, Z.H. Xiao, Y.P. Luo, H. Ou, H.W. Wu, F. Ye
Three types of saccharides including glucose, fructose and starch were used as the carbon precursors to synthesize carbon microspheres (CMSs) through hydrothermal process and subsequently pyrolysis, with emphasis on investigating the effect of the types of saccharides on the particle size and morphology...
Proceedings Article
The Research on Synthesis of Polyacrylamide with Photo-Initiation
Meng-Ting Li, Xiang Zhang, Chu-Yang Xu, Yan-Fen Wang
This paper has studied the influence of different initiation of flocculants synthesis, the effect of flocculant products based on solid content and characteristic viscosity indicators to the performance on different types of polyacrylamide products, and then chose the best one as the research object....
Proceedings Article
Vertical Market Integration of Cooking Oil Commodities in Jember Regency: Vector Error Correction Model (VECM) Approach
Illia Seldon Magfiroh, Intan Kartika Setyawati, Luh Putu Suciati, Rena Yunita Rahman, Ahmad Zainuddin
The price of cooking oil in Jember Regency, has continued to fluctuate over the past few months. These changes in cooking oil prices certainly have implications for the decline in people’s purchasing power and the producer’s selling power. Prices at the producer level must be properly transmitted to...