Advances in Physics Research

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511 articles
Proceedings Article

Physics Learning Tools of Inquiry-Creative-Process Integrated Ethnoscience: Its Validity to Train Prospective Teachers’ Critical Thinking Ability

Ni Nyoman Sri Putu Verawati, Ahmad Harjono, Wahyudi, Syifa’ul Gummah, Saiful Prayogi
This study aims to develop physics learning tools of an inquiry-creative-process (ICP) model integrated with ethnoscience and to find its validity in training prospective teachers’ critical thinking skills. This study’s learning tools developed and tested for validity comprise lesson plans (RPS) and...
Proceedings Article

Effect of Organic Loading on Biogas Yields from Continuous Semi-dry Fermentation of Swine Manure

Q. Li, Y.P. Tan, J. Ma, J. Hu, C. Chen
Down pushed flow anaerobic reactor (DPAR) was adopted in the paper to reveal the yielding gas process by taking swine manure as the material under different volume organic loading (3.11, 4.44, 5.78 gTS.L-1.d-1) and to detect the optimal volume organic loading for semi-dry fermentation of swine manure....
Proceedings Article

Experimental Research on Mechanical Properties of Fiber Reinforcement Cement Stabilized Soil

Le Jiang, Xing-Zhong Weng, Bo-Han Yang, Jun Zhang, Jun-Zhong Liu, Xiang-Cheng Yan, Hua Fang
In order to investigate the strengthening mechanism of modified polypropylene fiber reinforcement cement stabilized soil (MPFRCSS), the unconfined compressive strength (UCS) was used to test the performance of soil with different fiber contents, different cement contents, and different maintaining conditions....
Proceedings Article

Analysis of Student’s Knowledge, Attitudes, and Skills in Flowering Plants Improvement

Ratna Dewi Wulaningsih, Agung Purwanto, Budiaman Budiaman, Rusdi Rusdi, Erna Heryanti
This study aims to analyze the knowledge, attitude, and skills of students in flowering plant propagation. The cognitive (knowledge), affective (attitude), and psychomotor (skill) aspects studied in this study are important components of the learning process. A descriptive survey design was used with...
Proceedings Article

Improving the Value of Spent Coffee Ground by Converting Carbohydrates into Sugars by Saccharomyces cerevisiae to Produce Bioethanol

Syahruddin Syahruddin, Hayyun Lisdiana, Erdawati Erdawati
Spent coffee grounds contained 45% carbohydrate, 26% lignin, 13% lipid, and 13% protein. To improve the value of spent coffee grounds in a sustainable way, a study was done on how to convert carbohydrates into fermentable sugars which could be used to make value-added products. To accomplish this, a...
Proceedings Article

Temperature Influence Bacterial Residual of Escherichia Coli Associated with Lettuce

T.W. Zhang, F. Tan, M.S. Hou, X. Dong, M.M. James
Bacterial contamination is one of the most concern for food safety control in supply chain of fresh vegetables. The bacterial residual is available to be used for expression of the potential risk. Select Escherichia coli 1.1187 as a target to simulate bacterial contamination associated with lettuce....
Proceedings Article

Soil Chemical Properties Improvement by Addition of an Enriched Biochar for Growth Promoting on Soybean

Sugeng Winarso, Rendy Anggriawan
Biochar is a carbon-rich material that has various functions in improving soil properties. This research aimed to determine the characteristics of improvement in soil chemical properties and soybean plant growth by adding biochar from various biomass sources. The design used was a factorial complete...
Proceedings Article

Effects of Curing Conditions on Properties of Fly Ash-based Geopolymer Concrete

Xue-Hua Ye, Jin-Yu Xu
The fly ash-based geopolymer concrete (FAGC) were prepared by using fly ash as the main binder. The influences of curing conditions on mechanical properties and permeability were investigated by compressive test, flexural test and permeability test. The results indicate that elevated temperature curing...
Proceedings Article

Preliminary Development of Refutation Texts for Conceptual Change on Lunar Phases

D. Devianty, S. Syuhendri
The conceptual change model by Posner et al. states that students must be dissatisfied with the old conceptions, and the substitute conceptions must be intelligent, plausible, and fruitful to ensure the conceptual change. The previous study has obtained students’ misconceptions about the Lunar Phase...
Proceedings Article

Chemical Composition Characteristics and Usability Evaluation of Flue-cured Tobacco Leaves –A Case Study of Tobacco-producing Areas in Chongqing Municipality, China

B.W. Huang, C.F. Wei, H. Deng, J.K. Lv
The market of Chongqing flue-cured tobacco always lacks a relatively perfect evaluation of its quality objective system. In order to solve the mentioned problem, this paper will carry on the appraisal to the chemical of flue-cured tobacco and availability. There are nine main tobacco-producing districts...
Proceedings Article

Exploring Protist Literacy Among University Students’: Findings from a Recent Survey

Hardianto Hardianto, Susriyati Mahanal, Hendra Susanto, Sitoresmi Prabaningtyas
Students have difficulty in associating Protist organisms in their daily lives. Protist literacy is needed so that students can apply the concept of Protista in the real world. The purpose of this study is to find out the level of students’ Protist literacy. This study is survey research using a sample...
Proceedings Article

Machine Learning-Based Surface Refractivity Prediction in Coastal and Inland Regions of West Africa: A Comparative Study

K. C. Onawumi, A. T. Adediji, S. T. Ogunjo
This conference paper investigates the application of machine learning models for predicting surface radio refractivity across diverse climatic zones in West Africa, focusing on four key locations: Kano, Freetown, Accra, and Niamey. Accurate radio refractivity prediction is critical for optimizing telecommunications...
Proceedings Article

Fabrication and Characterization of Microcapsules Containing Eel Fish Oil (Anguilla marmorata (Q.) GAIMARD)

Yonelian Yuyun, Nurwahidah M. Pide, Asriana Sultan, Jamaluddin
Eel (Anguilla marmorata (Q.) Gaimard) oil consists of unsaturated fatty acids such as Omega-3 and Omega-6, which quickly oxidize to become rancid under the influence of oxygen be inhibited by microencapsulation by the spray drying method. This study was designed to identify the microcapsule characteristics...
Proceedings Article

Preparation of Fe73Cr18Ni9 Alloy Powder from Nano-Fe73Cr18Ni9 Composite Oxide by Hydrogen Co-reduction Process

Hui-Min Yu, Zai-Yuan Li
In this paper, Fe73Cr18Ni9 composite oxide nano-powder was prepared by chemical co-precipitation method taking FeSO4•7H2O, CrCl3•6H2O, NiSO4•6H2O and NaOH as raw materials. Its particle size was about 50nm. Then Fe73Cr18Ni9 alloy powder was obtained by hydrogen co-reduction process taking advantage of...
Proceedings Article

Potential of Actinomycetes from Bora Hot Springs Central Sulawesi to Produce Antibacterial Compounds

Abd Rahmat Sapa, Ayu Lestari, Meryany Ananda, I. Nengah Suwastika
Actinomycetes are Gram-positive bacteria that could produce antibacterial compounds, and it is able to survive in high temperatures environment such as hot springs. In this study, Actinomycetes were isolated from Bora hot springs before, characterized, and determined their potential in – other antibacterial...
Proceedings Article

The Effectiveness of PBL (Problem-Based Learning) Sound Wave Electronic Student Worksheets to Improve Critical Thinking Skills of High School Students

Husnul Fuadi, Gunawan, Susilawati
Digital teaching resources are an alternative to traditional textbooks in the “digitalization 4.0” era. The student worksheet is one of the digital instructional resources that can be generated. Along with using digital teaching tools, the selection and implementation of learning models are equally important...
Proceedings Article

Identification Chemistry Pre-Service Teacher’s Misconceptions on The Topic Atomic Structure

Rika Siti Syaadah, Maria Paristiowati, Hayyun Lisdiana
This study aimed to identifying pre-service teachers’ misconceptions in atomic structure through three-tier diagnostic test. Misconceptions are inaccurate understandings held by students which often became obstacles in learning (Duit & Treagust, 2008). Students thoose who have misconceptions about...
Proceedings Article

Assessment of Rain Attenuation for Terrestrial Communication Links in Kaduna State, Nigeria

Mohammad Adamu, Kingsley Chidozie Igwe, Joel Aghaegbunam Ezenwora, Elijah Olusayo Olurotimi
Designing satellite and terrestrial communication links requires accurate predictions of rain rate and rain attenuation because rain-fade and its dynamic fluctuations have consistently been detrimental to received signals, especially in tropical regions known to be prone to heavy rainfall. Nigeria’s...
Proceedings Article

Proximate Quality of Laying Hens Feed with the Addition of Sardine Waste

Anik Fadlilah, Edy Susanto, Husnul Muthoharoh, Wahyuni, Ida Susila, Edi Sutanto, Marsha Savira Agatha Putri, Habi Suryo Margono, Muhammad Fakhrur Rozi
This study aims to determine the effect of increasing the value of carbohydrate, protein, fat, and calories content in artificial feed added with fish oil and to find out the best composition of the addition of fish oil in artificial feed that provides optimal protein levels for the growth of laying...
Proceedings Article

The Influence of Fiber on the Resistance to Chloride-Ion Penetration of Concrete under the Environment of Carbonation

Qi Huang, Xiao-Shuang Shi, Qing-Yuan Wang, Ling Tang, Hong-En Zhang
The rapid chloride penetrating test of ordinary Portland concrete (OPC), glass fiber reinforced concrete (GFRC) and basalt fiber reinforced concrete (BFRC) were carried out under the environment of carbonation. This study investigates the differences of carbonization depth, porosity and permeability...
Proceedings Article

Isolation and Characterization of Endophytic Actinomycetes on Onion Root (Allium Ascalonicum L.) Palu Cultivar

Ayu Lestari, Abd. Rahmat Sapa, Meryany Ananda, I. Nengah Suwastika
Endophytic microbes are microbes that during their entire life cycle are in plant tissues. Actinomycetes is one of the endophytic microbes that produce secondary metabolites and can be found in the roots of onions. This study aimed to isolate, characterize and determine the growth rate of endophytic...
Proceedings Article

The Effect of Differentiated Learning with Think-Tac-Toe Strategy on Students’ Learning Outcomes on the Topic of Buffer Solutions

Elma Suryani, Muthiah Nur Azzahra, Achmad Ridwan
The new curriculum in Indonesia known as Kurikulum Merdeka, emphasizes the importance of differentiated learning. This approach develops learning according to the needs of students who have a diversity of ability levels and different learning styles and interests. This study aims to determine the effect...
Proceedings Article

Microstructure Evolution Simulation during Microextrusion at Elevated Temperature

S. Chen, F. Chen, L.J. Zhang, X.H. Huang, X.Y. Ding, X.P. Zhang
Controlling the microstructure in the final product is significant to metal hot forming at either macroscale or microscale. The microstructure evolution during the hot forming must be fundamentally understood in order to control the microstructure. Elevated temperature contributes to minimize the size-effects...
Proceedings Article

Artificial Neural Networks for Prediction of Rain Attenuation on Ku-band in South Africa

Lekhetho Joseph Mpoporo, Pius Adewale Owolawi, Gbolahan Rilwan Aiyetoro
In satellite communication networks on Ku-band and above, the propagation of signals is affected by various properties of weather conditions like hail, fog, and rain. The attenuation by rain is a dominant source of impairment of signal propagation operating on frequencies above 10 GHz. It is important...
Proceedings Article

The Participation of Tenggerese Farmers in Supporting Food Security

Sudarko, Sofia, Yuli Hariyati, Sugeng Winarso
Food security is a system consisting of three sub-systems, namely availability, distribution and consumption. The participation of horticultural farmers in efforts to support food security is needed to achieve food self-sufficiency. The purpose of the research is to analyze; (1) gender conditions and...
Proceedings Article

Environmental Literacy of Prospective Science Teacher in Lombok Indonesia

Khaerus Syahidi, A. Wahab Jufri, Aris Doyan, Kosim, Joni Rokhmat, A. A. Sukarso
This report describes the Skills literacy environment of student candidate teacher chemical in Faculty MIPA at University Hamzanwadi. Skills consist of competence environment, knowledge environment, and attitude to the environment. Data were collected by surveying semester 4 and 6 students. From the...
Proceedings Article

Isothermal Adsorption Model of Reduction of Ni2+ Ion by Chitosan Membrane of Rice Snail Shell (Pilla ampullaceal)

Dwi Juli Puspitasari, Nurlaila L. Tapo, Arif Ahmadi, Prismawiryanti
Heavy metals are detrimental to living organisms and ecosystems because they are non-biodegradable and accumulate in the environment and food chain. The research objective was to determine the maximum contact time, pH, and the isothermal adsorption model for the adsorption of Ni2+ ions by the chitosan...
Proceedings Article

Research on Non-autoclaved Fly Ash Lightweight Wall Block with Material Properties

Jie Zhang
Non-autoclaved fly ash lightweight wall block with industrial waste fly ash as main raw material enhance the activity of fly ash by mechanical activation at the normal temperature and pressure, and through adding activator sodium silicate, gypsum, sodium sulfate for chemical activation. Experiments show...
Proceedings Article

Analysis of Variations in Students’ Conceptual Understanding on the Concept of Salt Hydrolysis Using Phenomenography

Elsa Vera Nanda, Qoulan Karima, Tritiyatma Hadinugrahaningsih
This study examines the variation of conceptual understanding of students in grade XI MIPA regarding salt hydrolysis through phenomenography. The study, which was conducted at SMA Negeri 58 Jakarta in the 2022/2023 academic year, used qualitative methods and involved 36 students from class XI MIPA A....
Proceedings Article

Lubrication Simulation and Solution of Oil Film Force and the Equilibrium Position of Three-lobe Journal Bearing

Kun Qian, Wei-Gang Guo
Through the simulation of lubrication condition, the solution of the nonlinear oil film force of the three-lobe journal bearing with Difference Method and the solution of the axis equilibrium position of the three-lobe journal bearing based on Secant Method, we obtained that installation angle of the...
Proceedings Article

Analysis of Digital Literacy of Pre-service Teachers Involved as Teaching Assistants in Independent Study Programs (Called MBKM) 2022

Hairida, Lily Thamrin, Putri Tipa Anasi, Dyoty Auliya Vilda Gasha, Nurfadilah Siregar, Erlina, Anggi Fatmadiw
Digital technology cannot be separated from education as it can support teaching and learning activities. Therefore, pre-service teachers must have digital literacy. This study aimed to determine and analyze the digital literacy of undergraduates involved in the program MBKM as teaching assistants at...
Proceedings Article

Effect of Trioctylamine on Microstructure of Water Containing Polystyrene Microcapsules

Sukhbaatar Batchuluun, Kentaro Yasui, Hideki Matsune, Koichiro Shiomori, Shiro Kiyoyama, Ochirkhuyag Bayanjargal
Microencapsulation technology has been used in a variety of fields including materials such as buildings, walls, industrial, medicine, and cosmetics. One of the most active research on microencapsulation is microstructure formation. Important properties of microcapsules such as releasing rate of active...
Proceedings Article

Welfare of Paddy Farmers and the Influence of Paddy Prices on Rice Prices in Lumajang Regency

Evita Soliha Hani, Rachmat Udhi, Djoko Soejono, Gatot Subroto
Rice products come from paddy cultivated by farmers. Farmers as upstream actors in rice agribusiness obtain lower exchange rates than paddy and rice traders. This condition reflects the low purchasing power of farmers from paddy farming for the products consumed (e.g., rice). This study aims to (1) determine...
Proceedings Article

Development and Testing of Conversion Models from 60-min to 1-min Rainfall Distribution over Gqeberha, South Africa for Millimeter Wave Applications

Elijah Olusayo Olurotimi, Kingsley A. Ogudo
Rainfall is the main cause of signal degradation along the communication signal links above 10 GHz frequency. A crucial parameter for accurately determining rain attenuation is the 1-min rainfall integration time which is very scarce. This paper presents a conversion model for Gqeberha in South Africa...
Proceedings Article

Reinforced Concrete Sewer Pipes used for Jacking Construction of Experimental Research and Finite Element Analysis

Yan-Min Yang, Run-Tao Zhang, Bo Qu
This paper reinforced jacking construction method, which used reinforced concrete sewer pipes to conduct the external pressure load test, and the cracking load and the failure load of reinforced concrete sewer pipes were tested, and its local and overall deformation under different load levels. At the...
Proceedings Article

Perceptions of Chemistry Teachers at Pontianak City State High Schools in Utilizing Information and Communication Technology

Fatmawati, Hairida, Rini Muharini, Rody Putra Sartika, Rahmat Rasmawan
Information and communication technology (ICT) is very important in 21st-century education because it can improve students’ understanding. The purpose of this study was to describe the perception of chemistry teachers at SMA Negeri Pontianak about the use of ICT in learning. The research method used...
Proceedings Article

Exploration of the Potential of Dandang Gendis Leaf Extract (Clinacanthus nutans L) as an In Vitro Antidiabetic (A-Glucosidase Enzyme Inhibition Test) and In Vivo (Decrease Glucose Levels and Glut-2 Expression in Mice)

Artati, Ahyar Ahmad, Abdul Karim, Sofa Fajriah, Harningsih Karim, Nuradi, Arfiani Nur, Ummi Zahra, Syahida Djasang, Muhammad Nasir, Siti Nurul Fajriah
Diabetes mellitus is thought to play a role in increasing free radicals, de-creasing antioxidants and triggering oxidative stress, and causing damage to GLUT 2. GLUT 2 on the pancreatic cell membrane is responsible for the transport of blood sugar in mice which will stimulate insulin secretion. Dandang...
Proceedings Article

Grid-Search Criterion Technique for ARMA Model Optimization for Rain Rate Prediction in a Tropical Location

D. B. Akoma, S. D. Adeyeye, O. Opeyemi, O. T. Ayoola, M. Gbalaja, J. S. Ojo
Intense rainfall is a significant factor affecting communication systems as radio signals interact with raindrops along their propagation path in the troposphere. However, the spatial and temporal variability of rainfall makes its measurement and prediction challenging. This study endeavors to investigate...
Proceedings Article

Investigation of Uniaxial Asymmetric High-cycle Fatigue Failure Behavior of 7075-T651 Aluminum Alloy Sheet

Da-Lian Yang, Yi-Lun Liu, Song-Bai Li, Jiu-Huo Yi, Jie Tao
In this investigation, the high cycle fatigue life of 7075-T651 aluminum sheets under different stress levels were tested, and S-N curves were obtained by fitting the test data. For the problem that the traditional S-N curve fitting methods without considering the effect of fatigue limit on the S-N curve...
Proceedings Article

Effect of Flexoelectricity on the Electromechanical Coupling of Piezoelectric Nanoplates

Zheng-Rong Zhang, Li-Ying Jiang
Flexoelectricity is referred as an instantaneous polarization of dielectrics in response to non-uniform strains or strain gradients. Due to the fact that strain gradients are inversely proportional to the feature size of structures, the flexoelectricity is believed to be significant at the nano-scale....
Proceedings Article

Influence of Fibres on the Strain Hardening Behaviour of Ultra-High-Performance Geopolymer Concrete: A Review

Shimol Philip, M. Nidhi
Continuous cement manufacturing has increased the percentage of CO2 emitted into the air, thereby increasing the problem of global warming and its damaging effects on the environment. Therefore, adopting a more sustainable strategy to replace conventional concrete has become essential. Geopolymer concrete...
Proceedings Article

Calcined Kaolin as Adsorbent for Organic Compounds in Peat Water

Nelly Wahyuni, Gusrizal, Yeni Juliawati
Kaolin is a clay mineral composed of silica tetrahedral and octahedral alumina layers, which have high absorption capacity and are abundant in nature. This study aims at determining the optimum temperature of kaolin calcination and the effect of variations in pH, stirring time, kaolin mass, and stirring...
Proceedings Article

Diurnal and Seasonal Variability of Radio Refractivity Over Coastal Nigeria

E. T. Omotoso, F. Olajide-Owoyomi
In this paper, one-year meteorological data from 2015 were obtained from the European Center for Medium-Range Weather Forecast (ECMWF) for seven stations located in the seashore region of Nigeria. The study focused on the diurnal, seasonal, and annual fluctuations of the Earth's atmospheric refractive...
Proceedings Article

Warping Effect to Bend-twist Coupling Characteristics for Box Spar of Wind Turbine Blade

Xing-Yin Zhou, Li-Qiang An, Zhang-Qi Wang
In order to study the effects of sectional warping to bend-twist coupling characteristics for box spar of wind turbine blade, section stiffness of different regions are calculated with weather considering warping effect or not, the results show that warping effects differently in different part of the...
Proceedings Article

REACT Strategy: Efforts to Link Concept Colligative Properties Application in Daily Life and Science Development

Rahmat Rasmawan, Hairida, Rody Putra Sartika
Applying the concept of colligative properties of solutions is closely related to everyday life and science development, so the REACT strategy can be applied in learning. This research aims to develop a valid flipbook for learning the colligative properties of solutions that relate the concepts and their...
Proceedings Article

The Influence of Mineral Salt Interface Modifier to Pavement Rubber Concrete Strength

Yi-Ning Zhao, Shuai Tian, Yi-Ming Chen, Yu-Ting Yan, Shao-Yue Jin, Xu Zhang, Guang-Bao Li
The experiment researched the influence of mineral salt to pavement rubber aggregate and the interface shear strength of cement matrix, which also discussed the mechanism of action about mineral salt interface modifier .Research showed: mineral salt has a big effect on the compressive strength of rubber...
Proceedings Article

Phytochemical Analysis and Escherichia coli Anti-bacteria Activity of Teak (Tectona grandis Linn. f) Leaves Extract

Abdul Hapid, Ariyanti Ariyanti, Erniwati Erniwati, Muthmainnah Muthmainnah, Zulkaidhah Zulkaidhah, Hamka Hamka, Rita Mayang Sari, Asniati Asniati
Teak (Tectona grandis L.f.) is a medicinal plant that has been traditionally used by people around the forest as medicine. Teak leaves contain antibacterial compounds. This study aims to find out what compounds are contained in teak leaves extract and test antibacterial activity against E. coli bacteria....
Proceedings Article

A Sensor System to Monitor the Early-Stage Corrosion of A36 Carbon Steel

Dong Chen, Max Yen, Paul Lin, Steve Groff, Richard Lampo, Michael Mcinerney, Jeffrey Ryan
An innovative sensor containing A36 carbon steel was explored for corrosion monitoring. After being soaked in an aerated 0.2 M NaCl solution, the sensor’s normalized electrical resistance (R/R0) decreased continuously with the extent of corrosion from 1 to 0.64. Meanwhile, the sensor’s normalized capacitance...
Proceedings Article

Melting and Crystallization Behaviors of Poly(lactic acid)/Polypropylene Blends

Zhi-Fei Bai, Qiang Dou
The melting and crystallization behaviors of poly(lactic acid) (PLA)/polypropylene (PP) and PLA/PP/PP-graft-maleic anhydride (PP-g-MAH) blends were investigated by means of differential scanning calorimetry (DSC) and polarized light microscopy (PLM). The results showed that the pure PLA and the PLA in...
Proceedings Article

Separation of Unsaturated Fatty Acids of Nyamplung Oil Using Urea Crystallization as Basic Ingredients of Synthesis Dihydroxy Stearic Acid

Erin Ryantin Gunawan, Dedy Suhendra, Dina Marlina Oktavia, Murniati
Dihydroxy stearate acid (DHSA) is a compound used as an emulsifier and additive in cosmetic formulations. This study aims to separate the unsaturated fatty acids of nyamplung oil, synthesis DHSA, Characterization of unsaturated fatty acids and DHSA compounds. The separation of unsaturated fatty acids...
Proceedings Article

Effect of Sintering Temperature on Hydroxyapatite Yield of Cuttlefish (Sepia sp.) Using the Wet Deposition Method

Abd Rahman Razak, Agnes Stasya, Ruslan, Hardi Ys
Hydroxyapatite, abbreviated as HAP (Ca10(PO4)6(OH)2), is the main component in bone structure which is osteoconductive. The HAP either synthetic or natural source, is widely used in biomedicine especially orthopedics or dental repair. In this study, HAP was synthesized using calcium and phosphate. Calcium...
Proceedings Article

Preparation of Bi2WO6 Nanoparticles with Improved Photocatalytic Properties by Adding Triblock Copolymer P123

Su-Hua Chen, Hong-Mei Wan, Guo-Ping Wu
Nanocrystalline bismuth tungstat with good visible light response has been synthesized using Pluronic P123 triblock copolymer as surfactant. The prepared samples were characterized by X-ray diffraction, UV-visible spectroscopy, scanning electron microscopy, and BET surface area analysis. The activity...
Proceedings Article

Recovery of the Rhodium( ) Octanoate Dimer by Aminopyridine-modified Resin

Rong-Geng Wang, Xue-Lei Pang, Hai-Yan Zhao
Macroporous chloromethyl polystyrene resin (MCPR) was modified by (2, 3, 4-) amino pyridine. Then Rhodium ( ) octanoate dimer (ROD) was recovered by the amino pyridine-modified resin. The adsorption and elution of ROD on the modified resin were investigated. The results showed 2-amino pyridine modified...
Proceedings Article

Change Point Detection in Time Series Data of Annual Maximum Daily Rainfall in Mamminasata Region of South Sulawesi, Indonesia

Wahidah Sanusi, Sahlan Sidjara, Sudarmin Patahuddin, Muhammad Danial
This research aim is to detect the change point year of annual maximum daily rainfall at eight rainfall stations in the Mamminasata region for the period 1989 to 2020. The Mamminasata region covers Makassar City, Maros District, Sungguminasa/Gowa District, and Takalar District. Research data were obtained...
Proceedings Article

Synthesis of Polyol Through Epoxidation and Hydroxylation Reactions of Ricinus Communis L. Oil

Dedy Suhendra, Erin Ryantin Gunawan, Sri Seno Handayani, Haerani
Polyols are intermediate compounds used as raw materials to produce highly valuable industrial materials. Generally, the raw materials for synthesizing polyols are petroleum-based, non-biodegradable fossil fuels. In this study, the raw material used is oil from Ricinus communis L. (Local name: jarak...
Proceedings Article

Facile Synthesis and Luminescence Properties of Silica Submicron Rods

Jie Chen, Ye Sheng, Li-Rong Ju, Ke-Yan Zheng, Mei-Qi Chang, Hui Zhang, Hai-Feng Zou
Silica submicron rods were conveniently synthesized through a simple sol-gel method at room temperature. The SEM images demonstrated that the obtained silica submicron rods had high purity and uniform diameter of about 380-400 nm. The XRD results showed the obtained silica submicron rods were amorphous....
Proceedings Article

Gender Inequality Index Modeling in Indonesia Using Geographically Weighted Panel Regression Method

Khaira Umi, Junaidi, Fadjryani
The Gender Inequality Index (GII) is an index that describes the failure of human development achievement due to the inequality of gender that is measured by several aspects such as health, empowerment, and labor market access. The Geographically Weighted Panel Regression (GWPR) is a developed model...
Proceedings Article

A Method about Printing Special Characters Using the Micro Printer

Wei-Dong Zhang
This paper introduced the capability and characteristic of micro-printer, and method of single chip microcomputer connecting with micro-printer. It’s important to illuminates the ideas and concrete steps to achieve how micro-printer is controlled to print special character by single chip microcomputer....
Proceedings Article

Online or Offline? A Pedagogical Debate on the 5E Learning Cycle Model

Rody Putra Sartika, Rahmat Rasmawan, Lukman Hadi, Masriani, Hairida, Yunita Puspasari, Helsa Ulfa Destari, Pingkan Ramadhan Sailendra, Muhammad Iqbal Abdul Hafiz
Learning has been carried out flexibly, meaning that if the Covid-19 condition increases, the learning will be carried out online. If the Covid-19 conditions decrease, the learning will be carried out offline again. This study aims to determine the differences in conceptual understanding of students...
Proceedings Article

An Experimental Study of the Property of Phase Transition Temperature for Organic Composites Phase Change Materials

Wei Cai, Zhi-Gao Sun, Hong-Kai Ma
In order to obtain suitable phase change materials and phase transition temperature, a series of organic composite phase change materials were prepared with decanoic acid (CA), louric acid(LA), myristic acid (MA), palmitic acid (PA), stearic acid (SA) and 1-dodecanol (DE), tetradecanol (TD) as raw materials....
Proceedings Article

Web Application of Classification of Potential Earthquake Region in Central Sulawesi

Jihad Nurul Islami, Rohis Rachman, Yayang Matira, Junaidi, Fadjryani
An earthquake is a shaking incident of the earth due to the movement or shift of rocks in the lithospheric part. This occurs suddenly due to the movement of tectonic plates. Central Sulawesi is an area of Sulawesi Island that has a high level of seismicity. This is because Sulawesi Island has many active...
Proceedings Article

Equivalent Laminated Model of the Aluminum Honeycomb Sandwich Panel

Jun Zhang
In order to improve quality, safety and dependability, researches on the mechanical characteristics of the aluminum honeycomb sandwich panel have been given more prominence. In the present study, an equivalent laminated model with three layers is presented to simulate the behavior of the aluminum honeycomb...
Proceedings Article

Implementation of the Gath-Geva Clustering Algorithm in the Clustering Districts/Cities in Central Sulawesi Based on Public Health Development Indicators

Nichen Grasya Peso’a, Rais, Nurul Fiskia Gamayanti
Public health development indicators are a health indicator set that can describe health problems. The health indicators set can, directly and indirectly, increase longevity and healthy life expectancy. Central Sulawesi was listed as the sixth province in Indonesia with the lowest public health development...
Proceedings Article

Effects of Dimethyl Formamide on Laser-induced Damage to SiO2 Films Prepared by the Sol-gel Method

Pei-Tao Guo, Yu-Hong Man, Yong-Ping Zhang
Monolayer SiO2 films with various dimethyl formamide (DMF) concentrations were prepared on BK7 glass by the sol–gel method. The refractive index and physical thickness of the SiO2 films were calculated using the transmission spectra of the samples. Laser-induced damage threshold (LIDT) results showed...
Proceedings Article

Preparations of Methylphenyldiethoxsilane by One Step Grignard Method and Methylphenylcyclosiloxane by Hydrolysis and Pyrolysis Methods

Min Li, Liu-Meng Chen, Bo-Quan Jiang
Methyl phenol cyclic silicone (MPCS) and methyl phenyl diethoxy silane (MPDS) are important materials for production of addition-cured liquid silicone rubber. The one step Grignard method was used to synthesize MPDS and the orthogonal test method was applied to optimize the process. The maximum MPDS...
Proceedings Article

Graph Clustering Based on Chemical Similarity in Marine Compounds and Antibacterial Compounds

Edy Saputra Rusdi, Nur Hilal A. Syahrir, A. Muh. Amil Siddik, Supri Bin Hj Amir, Wahyudi Rusdi
Many potential medicines have been discovered from marine natural products (MNPs). It indicates that marine compounds are essential sources in drug development and discovery. Although many marine compounds show particular biological activity, few are recorded as antibacterial compounds. Therefore, finding...
Proceedings Article

Preparation of Methylphenylvinyl Raw Rubber by Bulk Polymerization and Ring-Opening Polymerization Methods

Ting Liu, Shi-Jian Chen, Bo-Quan Jiang
Methylphenylvinyl raw rubber (MPVRR) is one of the important materials for preparation of phenyl-containing additive molding liquid silicone rubber (AMLSR). Two methods, bulk polymerization (BP) and ring-opening polymerization (ROP), were used to prepare MPVRR. The effects of formulation, temperature...
Proceedings Article

Optimization and Models of Decalcification from Bighead Carp Scale with Citric Acid by Response Surface Method

Yu-Mei Huang, You-Qin Zou, Bo-Quan Jiang
Fish scale is a newly developed alternative resource for extracting collagen,which is one of the important biological materials. To extract collagen from fish scale has a great significance to prevent pollution and receive good economic benefits. In this paper, based on the experimental results of single...
Proceedings Article

The Transversal Neighborhood Domination Number on Parachute Graph and Semi-Parachute Graph

Fransiskus Fran, Nilamsari Kusumastuti, Yuni Elisa, Steven
Given V be a set of vertices on a graph G. A set D ⊆ V, is dominating set of G = (V, E) if all the vertex that is not in the set D are neighbors to at least one vertex of D. The smallest number of elements in D is known as the domination number. A set D ⊆ V(G) is called...
Proceedings Article

Process and Models of Decalcification of Bighead Carp Scale by Hydrochloric Acid

Yu-Mei Huang, You-Qin Zou, Bo-Quan Jiang
Collagen is one of the important biological materials. Fish scale contains rich collagen. Extracting collagen from fish scale not only reduces the biological pollution but also receives good economic benefit. In this paper, based on the experimental results of single factor test made in our previous...
Proceedings Article

The Ambulance Route Efficiency for Transporting Patients to Referral Hospitals Based on Distance and Traffic Density Using the Floyd-Warshall Algorithm and Google Traffic Assistance

Clarisa Yovanda Priliana, Isnaini Rosyida
The route of delivering patients using an ambulance is important thing because it relates to a person’s life. It Requires finding an efficient route for patient delivery so that it can facilitate the ambulance journey. In this study, the ambulance route from the public-health centers to the referral...
Proceedings Article

Research Situation and Existing Problems of the Direction Reduction Process for Utilizing Vanadium Bearing Titano-magnetite

Gong-Guo Liu, Yong-Cai Wen, Jie Qin
A pilot plant for comprehensive utilization of the vanadium titanium magnetite resources was constructedin Pangang Group, and the plant applies direction reduction in the rotary hearth furnace (RHF)-melting deep reduction in electric arc furnace (EAF) as the main process. Through constant experimental...
Proceedings Article

Mechanism and Control Study on Metallized Pellet Bonding with High Temperature

Jie Qin, Gong-Guo Liu
The problem of metallized pellet bonding at high temperature, which appeared in the production of Pangang pilot plant for resources comprehensive utilization, is analyzed. It shows that it is the main cause leading to the metallized pellet bonding of low melting silicate phase bonding, and it is caused...
Proceedings Article

Measuring the Contribution of Batik Education Treatment Due to the Optimal Control of the Dynamic Model of Drug Addicts

A. L. Jaya, R. Ratianingsih, M. Abu, S. Saldi, D. Aryanto, N. Nacong, I. Setiawan
Central Sulawesi placed as the 4th of addicted drugs highest number in Indonesia. This paper proposes batik education treatment as an alternative for BNNK Palu in conducting its controlling program. There are three running programs; that are education ( C ...
Proceedings Article

Advances on Manufacturing of POSS Reinforced Resin Matrix Composites

Dan-Yong Wang, Jun-Cong Liu, Yi-Wei Chen, Shu-Hu Li, Hua-Zhen Wei, Min Xia
POSS with cage-like hybrid molecules composed of silicon and oxygen has raised great interests of materials researchers owing to its excellent mechanical and thermal properties, such as tensile strength, tensile modulus and glass transition temperature Tg. And it has been widely used in electronics,...
Proceedings Article

Traffic Flow Registraton for Unmanned Aerial Vehicle Detection

Gui-Yuan Xiao, Rong-Yi Du
Registration of detection data is to ensure the time-space consistency and effective fusion of air-ground traffic detection data. In this paper, we aim to propose a space-time registration method for the vehicle detection data of unmanned aerial vehicle (UAV). Considering temporal and spatial distribution...
Proceedings Article

Mobile App for Plant Watering System with Verticulture Planting Technique

Iman Setiawan, Junaidi, Fadjryani, Fika Reski Amaliah
The conversion of agricultural land into residential areas has resulted in a decrease in the availability of agricultural land, so it is necessary to implement an intensive agricultural pattern with a high level of productivity. One of them is by applying a vertical farming pattern or known as verticulture....
Proceedings Article

Hydrothermal Preparation of High Purity of Expandable Graphite

Yan Wu, Ji-Yang Ma, Bo Zhou, Yao-Qun Huang
Hydrothermal preparation of expandable graphite, which is mixing natural flake graphite , oxidant and intercalating agent to hydrothermal reaction. Hydrothermal could improve the oxidicability and intercalating ability of oxidant and intercalate agent, ensuring the smooth progress of the oxide-intercalated...
Proceedings Article

Determinant of Medication Adherence Among Patients with Hypertension: A Cross-Sectional Study

Sri Andala, Hizir Sofyan, Kartini Hasballah, Marthoenis
Hypertension means the increase of systolic and diastolic blood pressure upper 140 mmHg and 90 mmHg, respectively. Hypertension is a major problem in health that can be caused sudden death in patients. Globally the percentage of adherence towards HTN pharmacological treatment is poor due to the faint...
Proceedings Article

Self-assembly of 3D Graphene and Its Superior Adsorption Ability for Heavy Oil

Bo Zhou, Yan Wu, Yao-Qun Huang, Shu Wang, Guo-An Zha
Three-dimensional graphene (3DG) samples were prepared using template-free solvent- thermal synthesis route with graphene oxide (GO) as a precursor. With the GO concentration (CGO) increasing gradually from 4 mg/mL to 10 mg/mL, the morphology of the 3DG evolves from nanoparticle to 3DG monolith material....
Proceedings Article

The Design of the Infrared Spectrally Selective Low Emissivity Coating

Liang Peng, Jun-Sheng Li, Wen-Wei Zheng
The traditional low infrared emissivity materials do not have the infrared spectrally selective low emissivity characteristic, it brings the problem of compatibility of the infrared stealth and heat radiation. With the help of the one-dimensional photonic crystal(1DPC), selecting the infrared window...
Proceedings Article

A Study on the Preparation and Characterization of Curcumin and Gold Nanorods-loaded Albumin Nanoparticles and its Treatment of MCF-7 Breast Cancer Cells in Vitro

Chen Liang, Hao Zhang, Lin Wang, Dong-Sheng Zhang
This work aims to study the preparation and characterization of curcumin and gold nanorods-loaded albumin nanoparticles and investigate its treatment for MCF-7 human breast cancer cells in vitro. Gold nanorods (GNRs) were prepared by seedless method. While the curcumin and gold nanorods-loaded albumin...
Proceedings Article

Influence of Aging Time on the Mechanical Properties and Bendability of 2A12 Aluminium Alloy

Ling-Yun Zhang, Gui-Bo Wan, Samuel Ngugi, Yi-Pan Zeng
In this paper, the mechanical and forming properties of 2A12 aluminium alloy sheet were determined by using the uniaxial tensile test, including the yield stress , the ultimate tensile stress , the strain hardening exponent n, the strain ratio r, the elastic modulus E and the elongation at fracture point...
Proceedings Article

Parameters Determination of GTN Model and Damage Analysis of Aluminum Alloy 6016 Sheet Metal

Yu-Mei Hu, Min-Zhi Chen, Yue Xiao, Jin Xiao, Xi Tan, Qi Tang, Ying-E Zhou, Tai-Song Cui
Taking the material of AA6016 (Aluminum Alloy 6016) which is widely used in automobiles as the object of this study, the mechanical properties based on GTN (Gurson-Tvergaard-Needleman) model had been investigated. The parameters of the GTN model which were used for simulation were identified by uni-axial...
Proceedings Article

Electrical and Magnetic Transport Properties of Pr0.1Ca0.9MnO3

Y.M Yan, Y Zen, D.W Shi
Ceramic Pr1 xCaxMnO3 (x = 0.1) samples were prepared by solid-state reaction and the electrical and magnetic transport properties were studied by direct current (DC) and alternating current (AC) methods in different fields. A Curie temperature of 125 K determined by I-V measurements of ceramic Pr1 xCaxMnO3...
Proceedings Article

Ab-initio Calculation of Structural and Magnetic Properties of Annealed Cu2MnAl Heusler Alloy

Hang Shi, Xin Wang, Nan Zhang
Heusler alloys attracted considerable interest for their versatile magnetic properties. In this paper, Cu2MnAl Heusler Alloy samples were prepared with high vacuum melting furnace under the atmosphere of pure Argon. Then the samples were crushed and milled by planetary miller to get a uniform grading...
Proceedings Article

Effect of Electron Beam Irradiation on Viscosity and Degradation of Corn Meal

Shuai-Ling Yang, Le Xu, Song-Yi Lin
Corn meal was exposed to electron beam irradiation with doses ranging from 0.00 to 5.40 kGy. The effects of electron beam irradiation on corn meal pasting viscosity and degradation were compared. Pasting properties, viscosity and amylase content decreased significantly (P
Proceedings Article

The Production of Alkaline Protease from a Recombinant Strain Expressed Apr

Mei-Shuo Zhang, Ya-Nan Yang, Xue-Nan Li, Song-Yi Lin
The alkaline protease gene, Apr, from Bacillus licheniformis 2709 was cloned into an expression vector pET - 28b(+). The pET-28b(+) - Apr was expressed in a high expression strain E. coli BL21. In order to develop and optimize mathematical model of protease activity, three variables were investigated,...
Proceedings Article

Modeling and Analysis of the Dynamic Behavior for Interacting Cracks on Circular Cavities in Piezoelectric Material

Dong Li, Hui-Cong Wang
The present paper is exposed theoretically to the influence on the dynamic stress intensity factor (DSIF) in the piezoelectric material model with two permeable radial cracks emanating from the edges of two circular cavities, subjected to the dynamic incident anti-plane shearing wave (SH-wave). Green’s...
Proceedings Article

Study on Synthesis and Self-assemble Nano-materials of Tetra-substituted Phenoxy Nickel Phthalocyanine

Li-Xian Ma, Yan-Fen Wang, Jun-Shan Gao
Tetra phenoxy substituted nickel phthalocyanine nanofibers were preoared in large scale by self-assembling via a simple solvent diffusion method. The size of them was 100-200 nm in diameter and several micron in length. The formation mechanism of nickel phthalocyanine fibers was discussed and studied...
Proceedings Article

Design of the Lightweight Structure Inspired by Beetle Elytra and Its Mechanical and Thermal Properties

C. Guo, T. Xu, Y. Zhou, D. Li
Based on the microstructure of the cross section of the beetle elytra, a kind of bio-inspired lightweight structure with fibre-winding pattern was designed and made by the carbon fibre material. The mechanical and thermal properties of the lightweight structure were studied with finite element method....
Proceedings Article

Reverse Reduction Ratio Effect on the Bonding Strength of 7075 Al/AZ31B Mg/7075 Al Laminated Composite Fabricated by Hot Rolling

Quoc Dinh. Cao, C.Y. Li, F. Chen, S. Chen, X.P. Zhang
Reduction ratio is one of the most important parameters that affect final bonding strength of laminated composites fabricated by hot rolling. In general, the bonding strength increases with the reduction ratio. However, it was found that the reduction ratio had a reverse effect on the bonding strength...
Proceedings Article

Preparation of Polyimide Films Derived from a Novel Precursor Pre-imidized Poly (amic acid) Ammonium Salt

Liu-Cheng He, Bai-Qing Tang, Li-Xing Dai
In this paper, a series of polyimide films were prepares through a novel precursor pre-imidized poly (amic acid) ammonium salt (PI-PAAS). The chemical structure of PI-PAAS films was confirmed by 1H NMR, and the degree of pre-imidization was confirmed by FT-IR spectra. And the intrinsic viscosity of the...
Proceedings Article

The Study of Design Semiotics and Architectural Space Semantics

Pu-Hua Yan
This paper summarizes the main theory and development status of semiotics in the field of architectural design. Using the basic principles of design semiotics, it analyzes the context of space capabilities in the field of architectural design, space syntax building mode, and the aesthetic and spiritual...
Proceedings Article

Hot Compression Behavior of Al-Zn-Mg Aluminium Alloy: Experiments and Simulations

C.Y. Li, G.D. Gao, X.P. Zhang
The hot deformation behavior of Al-Zn-Mg aluminum alloy was investigated by means of compression tests and Finite Element analysis method in the temperature and strain rate ranges of 350oC to 500oC and 0.1s-1 to 0.4s-1, respectively. The load-displacement data and the maximal cross section area S predicted...
Proceedings Article

Effect of Process Factors on Viscosity of In-situ Particulate Reinforced Aluminum Matrix Composites

Zhi-Hong Jia, Dao-Cun Xie, Lan-Lan Xiong, Chi Zhang, Yu-Tao Zhao
Viscosity of aluminum matrix composites reinforced by TiB2 particle has been studied systematically by using the rotating cylinder method. The results show that the viscosity of melt decreased with the increase of temperature, and the changes are abnormal when the temperature is between 710 to 730 ....
Proceedings Article

Research on Processing Technology of Calcined Kaolin Powder Using A Fluidized Bed Jet Mill at Different Temperatures

Cui-Ping Yan, Ming-Xing Zhang
The calcined kaolin powder was obtained using a fluidized bed jet mill at the temperatures 17 and 280 .The theoretical arithmetic, numerical simulation and experiment were used to compare and discuss the results at the two temperatures. The particle size D50=2.401 m D50=2.003 m of kaolin powder was obtained....
Proceedings Article

The Microwave Synthesis and Photocatalytic Activity of Sb3+-doped TiO2 Nanocomposite

Xiao-Mei Jia, Cong-Sen Wang, Yuan Li, Xue-Hong Liao
Stibium doped titanium dioxide nanocomposite was prepared with stibium( ) chloride, titanium sulfate as raw materials and Sodium dodecyl sulfate as surfactant under microwave irradiation. Then the X-ray diffractometer (XRD) and the scanning electron microscopy (SEM) were used to observe the antimony-doped...
Proceedings Article

Inhomogeneity of Microstructure of Aluminum Alloy Welded Joint

Xian-Min Tang, Hai-Gen Jian, Jing-Fang Wu, Ling Ou
Al-Mg-Mn alloy hot-rolled plates with 10mm thick were welded by multipass MIG welding with the Al-Mg wire, and inhomogeneity of microstructure of the welded joint were examined by the methods of metallograph, scanning electron microscope (SEM) and energy spectrum. The results show that the inhomogeneity...
Proceedings Article

Influence of Copper(I) on Europium-containing Micelles

Zhao-Ye Li, Zhao-Jun Xue, Li-Jun Kong
This paper explains and demonstrates influence of copper (I) on europium (Eu)-containing micelles. Main influence contains hindering formation of Eu-containing micelles and quenching luminescence. That is because of coordination of copper (I) with 4-vinyl pyridine (4VP). Competition occurred in coordination...