Advances in Physics Research

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...

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....

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....

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...

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...

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....

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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....

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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....

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...

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...

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...

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...

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...

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...

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....

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...

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...

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...

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...

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...

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...

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...

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...

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....

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...

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....

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...

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....

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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 ...

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,...

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...

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....

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...

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...

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....

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...

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...

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...

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...

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...

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...

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

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,...

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...

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...

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....

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...

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...

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...

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...

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 ....

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....

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...

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...

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...