bluuebunny/crossref_metadata_2025_split huggingface dataset:
Natural disaster mitigation using geophysical methods
Authors: Susilo A , Sunaryo  , Suryo E A , Rachmawati T , Rosyid S 
Published: January 2022

Abstract
The research has been carried out about natural disasters (landslides, ground motion, drought) using geophysical methods. This research was conducted in several places, in East Java, i.e. land slides and ground motion occurred in Malang and Blitar areas and drought occurred in theTulungagung and Malang areas. This research uses resistivity and self-potential. The active method is resistivity, which means that an electric current is injected into the earth, after which the resulting potential difference is recorded, then processed. Self-potential and geomagnetic methods, are passive methods. In the self-potential method, the potential difference that occurs between two points, which have a certain distance, is recorded (the middle between those two points becomes a point measurement). The data of several points of measurement, that have been made within a certain distance, then is processed for determining underground river tracing. The equipment used is the OYO Mac Ohm resistivity meter. The results obtained are, an artesian well in the Tulungagung area, at a depth of 108 m, an indication of new faults in the Blitar area, and ground motion cracks in the Malang area.
Development of physics module based high order thinking skill (HOTS) to improve student’s critical thinking
Authors: Marnah Y , Suharno  , Sukarmin  
Published: January 2022

Abstract
Physics learning activities implemented in high school have not directed students to think critically and still tend to be teacher-centered. This results in students not being able to develop critical thinking skills to solve problems that involve reasoning in learning activities. The purpose of this study was to develop a product in the form of a physics module based on High Order Thinking Skills to improve critical thinking skills in student learning outcomes. The research and development method used is Research And Development (R&D). The research and development model uses a 4D Thiagarajan model with the research stages of defining, designing, developing, and distributing. The subjects in this study were students of class XI SMA. The technique of collecting research data is using a questionnaire and test questions Pre-Test-Post-Test. The results showed that the development of physics modules based on High Order Thinking Skills which was developed in class XI students increased by 71%, so that the development of physics modules had a significant effect on students’ critical thinking skills in the learning process on student learning outcomes.
Non-contact technique for CO2 gas monitoring using thermal imaging camera
Authors: Salamah U , Sakti S P , Soetedjo H , Naba A 
Published: January 2022

Abstract
CO2 gas is a poisonous gas that is invisible and odorless. Now days, the CO2 gas detection system uses the direct contact (in situ) method with the gas to identify its existance and quanities. The further determination is being carried out in the laboratories. This method is ineffective and inefficient because of some unpractical procedures as in the real situation collecting the gas could be dangerous. Therefore the development of a non-contact detection system will be important and challenging wor. One method of developing a non-contact gas detection system is using the Optical Gas Imaging (OGI) method. In this paper, a non-contact CO2 gas measurement system has been designed based on infrared absorption using an infrared thermal camera. The experiment is carried out on a laboratory scale with three main components of an infrared light source, a gas source and a detector. From the results, unique pattern of gas of CO2 coudl be distinguised from the open air and also mixed gas through the equalized histogram.
Initial evaluation of land use potential using geospatial analysis at Sendang Biru Beach, Malang Regency, East Java Province, Indonesia
Authors: Wahid A , Sunaryo  , Susilo A , Wiyono  
Published: January 2022

Abstract
The use of ArcGIS for geospatial analysis is vital as the first step in earth research. The research focused on Sendang Biru Beach, Tambak Rejo Village, Malang Regency, East Java Province, Indonesia. Based on the analysis of topographic, geological, and land use data, Sendang Biru Beach is located in a basin to a hill with an average height of 125 masl. Geologically, it is located in the Wonosari Formation, flanked by the Qas (swamp and river deposits) and the Tomm (Mandalika Formation). Furthermore, land use is dominated by dry forests. The basin is used for plantations, settlements, and scattered fields and has a karst aquifer flowing all year round, including springs that have diffuse and fissure channel types. The water quality in the area is still within normal limits, has not experienced contamination of seawater intrusion. Sendang Biru Beach Land in Tambak Rejo Village, the ideal development is directed at Fisheries and Coastal Tourism, supported by the presence of extensive dry forest land, karst aquifer resources, and the existence of Sempu Island as a nature reserve.
Preparation and characterization of CTAB surfactant modified TiO2 nanoparticles as antibacterial fabric coating material
Authors: Bukit B F , Frida E , Humaidi S , Sinuhaji P 
Published: January 2022

Abstract
TiO2 preparation has been carried out with the addition of cetyl trimethyl ammonium bromide (CTAB) surfactant. The sol-gel method is used in the preparation of TiO2, where TiCl4 is used as a precursor. The resulting TiO2 was characterized using XRD, FTIR, XRF and SEM. XRD results show the crystal size of TiO2 17.75 nm with the rutile phase. The FTIR results show a broad absorption band between 800 and 400 cm−1 by Ti–O vibrations in the crystal lattice. The XRF results showed that the TiO2 content was 80.80%. Morphological results showed an irregular ball-like structure that was less aggregated. The characterization results show that TiO2 can be used as a coating on fabrics with antibacterial properties.
Synthesis of Polydimethylsiloxane with hydrolysis and condensation methods using monomer of Dichlorodimethylsilane as vitreous humour substitute
Authors: Fauziah U , Sandi D , Arini V F , Aulia D G , Setiadji S , Fitrilawati  , Risdiana  
Published: January 2022

AbstractVitreous humour is a fluid in the eye socket, that can be disturbed due to changes in its chemical or physical structure. Polydimethylsiloxane (PDMS) that also known as a silicone oil is a liquid that is commonly used as a substitute for vitreous humour in vitreoretinal surgery. PDMS can be synthesized from the monomer of Octamethylcyclotetrasiloxane (D4). However, in Indonesia, it is still difficult to obtain D4 monomer, so an alternative is needed. In this study, a synthesis of PDMS was carried out using the monomer precursor Dichlorodimethylsilane (DCMS) through a hydrolysis method under alkaline conditions using potassium hydroxide (KOH). Then the monomer obtained from the hydrolysis process was self-polymerized by aging to form a polymer gel. The concentration of KOH was varied at 0.5, 0.6 and 1 molar. The synthesized PDMS gel have viscosity values of 0.57, 1.53 and 4.49 Pa.s, density values of 0.986, 1.004, and 1.005 g/mL, refractive index in the range of 1.4001-1.4012, and surface tension in the range 19-21 mN/m. Those values of synthesized PDMS are similar to properties of commercial PDMS. We obtained that PDMS sample that synthesized using 1 M KOH shows the fastest polymerization time.
Analysis of physics learning needs due to the covid-19 pandemic
Authors: Sudarsana W , Sarwanto  , Marzuki A 
Published: January 2022

Abstract
This study aims to determine the need for learning physics due to the covid-19 pandemic. This type of research is a preliminary study with a descriptive approach and the instrument used is a questionnaire. The research subjects were 30 high school teachers consisting of 30 schools in two provinces of East Java and Central Sulawesi. The data analysis of this research is descriptive qualitative obtained based on the teacher’s answers. This study shows that several learning components influence overcoming learning problems during the COVID-19 pandemic, namely technological developments, learning models, and learning media. This study concludes that it is necessary to develop physics learning devices as an alternative to learning during the covid-19 pandemic.
Development of an ethnophysic-based module in the Mandailing Tribe, West Pasaman Regency as science teaching materials
Authors: Walid A , Oktaria S D , Putra R E , Nipriansyah  , Susanto E 
Published: January 2022

Abstract
The purpose of this study is to develop ethnosains learning modules that are feasible and practical for use after being validated by several experts and responded by several teachers and students. The research method uses the Borg & Gall development model which consists of 8 stages, namely a preliminary study stage, a research planning stage, a design development stage, an initial trial phase, an initial product revision, a limited field test, a revised stage of the results of a limited field test, and a product stage end. This research is limited to the limited field trial stage namely the feasibility and practicality of the module. The instrument used was a questionnaire for module eligibility and student and teacher response questionnaires to test the practicality of the module. Data from the analysis of the questionnaire by calculating the percentage of achievement in each component of the percentage of achievement criteria of eligibility and practicality of science learning modules based on ethnics that was developed. Ethnographic-based science learning modules developed were declared feasible to be used with a percentage of 90.00% (linguists), 88.00% (material experts), 96.00% (design / media experts) with the very feasible, feasible, and very feasible and the percentage of eligibility of 3 colleagues is 91.46%. Practical to use with the response percentage of 10 students 84.83% (very practical category), and the response of 2 science teachers with a percentage of 93.40% (very practical category). Practical to use with the response percentage a total average of 10 students namely 84.83% are in the interval of 80% ≤ PRM ≤ 100%. And based on the teacher’s questionnaire response that is 93.40% which is included in the category of very practical From the results of these data it can be concluded that the module has been feasible and practical to be used as teaching material in supporting the teaching and learning process on the material interaction of living things with their environment.
Innovation of simple binoculars as a teaching aid for optical practicum at school
Authors: Azhar  , Fuadi H , Doyan A , Susilawati  , Ayub S , Hudha L S 
Published: January 2022

Abstract
Learning aids are tools used by teachers in learning and prevent verbalization in students. The purpose of this research is to make simple earth telescopes as visual aids for optical practicum in schools. The method used is the experimental method, namely analyzing, designing, making and testing the props made. The subjects of the research were 17 students of physics education FKIP University of Mataram. The binoculars test saw the object of letters and writing with the font Times New Roman 350 at a distance of 50 meters and 100 meters. The results showed that the object was clearly visible with the satisfaction level of using the teaching aids a score of 3.71 the criteria were satisfied and suitable for use. The use of simple earth telescopes is suitable for use in optical practicums in schools. Teachers are expected to be able to create and develop teaching aids to improve students’ understanding of concepts.
Digital thermometer innovation as a body temperature measuring tool for FKIP Mataram university employees during the covid-19 pandemic
Authors: Fuadi H , Susilawati  , Doyan A , Taufik M , Azhar  , Hudha L S 
Published: January 2022

Abstract
The impact of the Covid-19 pandemic requires that every employee in a university maintains his health. One of the most important body parts to maintain during this pandemic is body temperature. The purpose of this study was to develop a non-contact digital thermometer to measure the body temperature of FKIP employees, Mataram University. The digital thermometer development method starts from literature studies, tool specifications, hardware design, software design and thermometer testing to measure employee body temperature in the morning and afternoon. The results of the digital thermometer test showed that the employee’s body temperature in the morning with an average of 33.36 °C and in the afternoon with an average of 33.96 °C. So it can be concluded that the Mataram University FKIP employees who came to work did not experience Covid-19 symptoms.
Analysis of creeping avalanche velocity using physics of landslide approach
Authors: Souisa M , Sapulete S M , Labok A 
Published: January 2022

Abstract
Creeping landslides are natural disasters and social disasters that often occur in the world. One of the main factors causing slope failure is rainfall and earthquakes. In this study, the constitutive model is described and analyzed for termite drift using the physics of landslide approach to deal with geomorphic changes as triggers for ground motion. The constitutive behavior of the soil-rock cover of the slope is characterized along a planar or curved slip plane and consists of different soil properties with different slope strength parameters. The morphology along the slip plane of the creeping soil is studied and analyzed to estimate the mass movement of the creeping landslide before being inhabited by rainwater and inhabited by rainwater. Calculation of the maximum velocity and runout time using the parameters of the slope geometry. The analysis shows that the geometry of the soil creeping plane on the slope and the different slope angles of the slip plane affect the velocity and runout time of the creeping landslide.
Geophysical Investigation and Geochemical Study of Sediment along the Coastal Area in Kota Belud Sabah, Malaysia
Authors: Musta B , Asat M A , Ling S Y , Saleh H 
Published: January 2022

Abstract
This article discusses the geophysical investigation of sediment and the status of heavy metals pollution in the coastal sediment from Usukan Beach, Kota Belud Sabah Malaysia. Study area is located at the northwest coast of Sabah which is bounded by the South China Sea and made up of Crocker Formation which age from Late Eocene to Early Miocene, Wariu Formation with Middle Miocene age and Quaternary Alluvium. This study using geoelectrical method namely electrical resistivity (IR) and induced polarization (IP) to measure the thickness of sediment and the parent rock lithology respectively. Whereas the heavy metal contents were measured using the Inductively Coupled Plasma-Optical Emission Spectrometry (ICP- OES). Three sets of subsurface cross-sections were conducted for the geophysical survey and covered the depth around 37 meters for all the survey line. The result of geophysical survey shows that the alluvium quaternary deposits in the low-lying flat area have a thickness up to 13 metres and overlie the mudstone dominated rock of the Crocker Formation. The geochemical analysis shows a decreasing ranking order of elemental concentrations Fe>Mn>Zn>Cu>Pb>Cr>As. The analyses show all elements are within the background values and acceptable standard limits of the Sediment Quality Guidelines (SQG) by USEPA for coastal sediments. The assessment of heavy metals revealed only minimal degree of pollution in the coastal sediments.
Development of length expansion temperature detector based on arduino uno
Authors: Azhar  , Siswadi  , Doyan A , Susilawati  , Taufik M , Hudha L S 
Published: January 2022

Abstract
Length expansion is an increase in the length of an object due to receiving heat. If a solid object is heated then the object will expand in all directions, in other words the length increases the length of an object because it receives heat. A tool for comparing the length expansion of various metals is the Musschenbrock. To measure the temperature of an object can use a sensor. The sensor used in this research is the LM 35 based on Arduino Uno. The development method for this Length expansion tool temperature detector starts from tool design, hardware design, software design, tool calibration and tool testing. From the results of research using an Arduino Uno-based temperature detector, it can be said that this research was successful because the values obtained were almost the same as the existing theory. So, this detector is suitable for use in laboratories or schools as a learning medium to determine the length expansion of metals.
The use of causalitic learning model to encourage abilities of problem solving and creative thinking in momentum and impulse
Authors: Rokhmat J , Gunada I W , Ayub S , Hikmawati  , Wulandari T 
Published: January 2022

Abstract
This study aims to test the use of a causalitic-learning model to encourage problemsolving and creative thinking skills. This study used a non-equivalent control group design. The population was students of class X Mathematics and Natural Sciences (MNS), Public Senior High School (PSHS) 3, the academic year 2018/2019, Mataram, Indonesia. Samples were taken using the purposive sampling technique and obtained by X-MNS-4 class students (33 students, 13 male, 20 female) as the experimental class and X-MNS-5 class students (28 students, 12 male, 16 female) as the control class. The data were taken using essay test questions and analysed using the MANOVA test but previously carried out the Lavene test and the Box’s M test (with the help of the SPSS version 23 application). The results of statistical analysis, with a significance level of 0.05, the null hypothesis on both research hypotheses were rejected. The conclusion is that the implementation of the causalitic-model in physics learning on the subject of momentum and impulse affects the improvement of students’ problem-solving and creative thinking abilities. Insights on innovation through technology integration, multi-answer phenomenon-based learning to promote creative thinking is also discussed. The implication is important for physics learning which emphasises conceptual understanding.
Kinematics and Simulation Analysis of Longitudinal-Torsional Ultrasonic Assisted Grinding of Zirconia Ceramics
Authors: Wei Mengbo , Feng Pingfa , Zha Huiting , Xu Chao , Ma Yuan , Feng Feng 
Published: January 2022

Abstract
Zirconia ceramics is a typical hard and brittle material, which is very difficult to process. In recent years, with the rapid development of the 3C industry, zirconia ceramic materials have achieved a wide range of applications. Longitudinal-torsional ultrasonic assisted grinding (LTUAG) is efficient for processing hard and brittle materials. However, the mechanism of LTUAG of zirconia ceramic is not studied sufficiently. In this study, the spatial trajectory of the grinding grain in three different grinding methods is established and the critical cutting speed of LTUAG is calculated. Simulation model of LTUAG of zirconia ceramic is established. The results show that the longitudinal-torsional ultrasonic vibration increases the spatial trajectory length of the grinding grain, thereby reducing the thickness of the maximum removal layer and reducing the cutting force. When the cutting speed is less than the critical cutting speed, LTUAG can significantly reduce the Mises stress, the subsurface damage and the cutting force.
Intelligent Evaluation Method of Marine Engine Simulator Based on Combination Weighting
Authors: Liang Shiyuan , Cao Hui , Shen Henglong 
Published: January 2022

Abstract
In order to solve the problems of objectivity and inaccuracy in the current evaluation of marine engine simulator, an evaluation model is established based on C-OWA (combination ordered weighted averaging)-the Coefficient of Variation method-minimum discriminant information principle combination weighting method and Vague set. Taking standby of marine generator project as an experiment example, the evaluation index system is established, and the evaluation model is applied to evaluate each evaluation team, and the final operation score of each team is obtained. The results show that (1) the index system is comprehensive and targeted for the operation evaluation of generator standby project; (2) the combination weighting method can improve the rationality of index weighting; (3) Vague set fuzzy decision-making can improve the accuracy of fuzzy evaluation of simulator operation; (4) the model shows rationality and reliability in evaluation results and can provide a reasonable and feasible method for intelligent evaluation of marine simulator.
Modeling and Simulation of Layered Water Tank Based on MATLAB/SIMULINK
Authors: Tan Xin , Zhu Zhenjing , Sun Guoxin , Diao Li , Cao Jingyu 
Published: January 2022

Abstract
In order to improve the accuracy of the stratified hot water storage tank model and simplify the modeling process of the stratified water tank, a modelling method of the stratified water tank based on MATLAB/SIMULINK is proposed. By comparing with TRNSYS platform simulation, the correctness and accuracy of this method are verified. At the same time, this method is used to establish a six-node stratified hot water storage tank. Through the simulation of 8 different working conditions, the influence of different inlet and outlet water flow rates and temperature of the inlet and outlet water on the stratification effect of the hot water storage tank is analyzed.
Agile Modeling and Simulation Technology of Heterogeneous Systems Based on Meta-model Modeling Method
Authors: Liu Yunfei , Ma Tao 
Published: January 2022

Abstract
Modeling and simulation of heterogeneous systems are faced with the problems of long modeling and simulation cycle, complex and changeable modeling fields and complex domain knowledge. In order to support the requirements analysis and initial design of the system, build the system model as the only authoritative truth source throughout the whole life cycle, and quantitatively characterize the requirements, functions, structure and performance of the system, this paper proposes an agile modeling and simulation technology for heterogeneous systems based on the meta-model modeling method, and on this basis, constructs an agile modeling and simulation system framework for heterogeneous systems.
Mathematical Model of the Integrated Filtering Reactor Windings Transformer
Authors: Li Shijun , Yang Jiayi , Wu Fumei , Luo Longfu , Liao Wendi , Xiang Jinwen 
Published: January 2022

Abstract
The integrated filtering reactor windings transformer is designed by a special winding arrangement design scheme. The air-core reactors of the harmonic filtering devices are integrated as the transformer windings in the transformer.so as to reduce the number of the equipments and covering area, The harmonic model of this kind of winding have been shown in this paper, and the harmonic current of each winding are deduced on the basis of the self-inductance and mutual-inductance voltage equation of multi-winding transformers. At last, this paper took a 300 KVA integrated filtering reactor winding rectifier transformer prototype as the experimental object to verify the correctness of the mathematical model.