bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis TPACK framework in ISLE-based STEM approach model: case study
Authors: Sari I M , Yusibani E , Irwandi I , Sofyan H , Suherman  
Published: May 2021

Abstract
TPACK is a framework that integrates technological knowledge, pedagogical knowledge, and content knowledge in a learning context. This article discusses the analysis of the TPACK framework in the application of the ISLE-based STEM approach for the case of mass-spring oscillations. The successful application of the ISLE-based STEM approach model in learning activities must start from increasing the TPACK ability. However, TPACK and ISLE-based STEM information are currently still limited, so it is necessary to conduct a study to analyze the TPACK relationship through the development of ISLE-based STEM learning instruments. This research was conducted based on the development of learning media, namely a prototype of spring vibrations using MEMS and IoT technology as well as student worksheets designed with an ISLE-based STEM approach model by the STEM Research Center of Universitas Syiah Kuala. The analysis results show that the application of TPACK through the ISLE-based STEM model approach requires a complex process. This information is a step in the development and assessment of ISLE-based STEM learning media on the TPACK framework to strengthen 21st-century skills.
STEM Outreach Program: An evaluation on students’ perspective towards STEM engagement via school-university mentoring partnership
Authors: Azman H H , Maniyam M N , Yaacob N S , Nawawi N M , Samah N N A , Alias R , Hassan K B , Kamaruddin H H , Khalid R M , Sout N M , I M , Abdullah H , Suliman N A , Moid M M , Yunus Y M , Latib L A , Idris N 
Published: May 2021

AbstractThe number of students pursuing science and engineering is reducing drastically over the years which is of great concern to the country. Hence, in 2011, the Malaysia Education Blueprint was initiated emphasizing on the role of STEM for establishing a scientific and innovative society. The National STEM Movement has taken the step forward to make the blueprint a reality by initiating the STEM Mentor-Mentee program in schools facilitated by universities. Universiti Selangor (Unisel) contributed actively through the participation of lecturers as facilitators and students as mentors. Fondly known as the Unisel Fun with STEM program, the team has shared their modules with seven schools in Selangor. This particular study is focusing on one of the schools, SMK Sungai Burong involving 60 students and 3 teachers, assessing the effectiveness of the module and the impact of mentoring approach. A five Likert scale survey was conducted at the end of the program with each of the four domains received positive feedback. The program itself was well-executed with the mean score of 4.24. The response towards the mentoring approach was very favourable, resulting in the mean score of 4.61. This outreach program is considered effective as students demonstrated positive attitude towards the module and STEM field.
Analysing students’ feedback: Their motivations and interests in STEM-based learning
Authors: Artika W , Mailizar  , Handayani D , Yulisman H , Nurina CIE 
Published: May 2021

Abstract
Student motivation and interest are essential components that contribute to the successful application of STEM-based learning, and they can be obtained through students’ feedback. Through feedback analysis, this study aims to obtain information about students’ motivation and interest in STEM-based learning activities. This survey research was conducted at one of Islamic high school in Aceh province. The research instrument was in the form of open-ended questions, amounting to four questions. Data were analyzed using an inductive approach. The results showed that students considered STEM-based learning to be fascinating because it trained them to think critically, creatively, and systematically, and relate to the real world. They also want to learn more about STEM-based biology learning. On the other hand, they think that teachers need to pay attention to learning facilities and techniques when carrying out STEM-based learning activities so that learning can run effectively. The results of this study inform teachers, lecturers, and education administrators to design effective STEM-based learning activities.
The impact of STEM PjBL on students’ engineering practice, scientific practice, and scientific attitude
Authors: Admawati H , Jumadi J 
Published: May 2021

Abstract
The study aimed to analyze the effect of Science Technology Engineering and Mathematics (STEM) Project-based Learning (PjBL) on students’ engineering practice, scientific practice, and scientific attitude. Scientific and engineering practice in this research focused on the planning and carrying out investigations (PCOI) aspect and obtaining, evaluating, and communicating information (OECI) aspect. This study employed the pretest-posttest control group design of experimental research. In this study, 70 of 8th-grade junior high school students in Yogyakarta were determined by a simple random sampling technique to become subjects. Data were obtained through (1) a multiple-choice test to measure the planning investigation and obtaining, evaluating, and communicating information as cognitive domains, (2) an observation sheet to observe the carrying out investigation as a psychomotor domain, (3) a questionnaire to obtain students’ scientific attitude of this study. The test instrument, the observation sheet, and the questionnaire had been developed and validated. Data from this study were analyzed by MANOVA in SPSS 16. The result of this study showed that STEM PjBL effected students’ scientific practice, engineering practice, and scientific attitude.
Effectiveness of visual programming implementation in thermodynamic experiments with the ISLE-based STEM approach model
Authors: Hasrati H , Ilyas S , Irwandi I , Munawir Al , Kaosaiyaporn O 
Published: May 2021

Abstract
Visual programming utilizes visual presentation to describe programs, data, structures, or dynamic behavior of complex systems. Labview is a visual programming software made by national instruments using language based on graphics or block diagrams. Labview is applied to thermodynamic experiments to see the effectiveness of the implementation in students learning through the ISLE-based STEM approach. Experiments by the students were finding the specific heating value and discovering the concept of the Black principle by utilizing the Dallas 18B20 as a temperature sensor that is connected through the NodeMCU ESP8266 device and Labview software. This research was conducted at SMA LabSchool Unsyiah with a total of 10 students participated following the pandemic protocol procedure. The data analysis results showed that 85% of students were happy with the learning approach, 80% of students were interested in the teaching materials, 78% of students stated that the experiments were effective for learning the concepts, 90% of students stated that they developed thinking skills. Students get an increase in scores on the post-test as much as 89% from the results of the pre-test. The assessment of the implementation of learning by the observer obtained a mean of 80.5%.
Improving ISLE-based STEM learning outcomes for building the 21st century skills and characters through a lesson study: A case study on Torque and Moment of Inertia
Authors: Ulfa Z , Irwandi I , Syukri M , Munawir Al , Halim A 
Published: May 2021

Abstract
The objectives of this study are as follows: (1) Developing ISLE-based STEM learning media, (2) Building 21st-century skills and character, (3) Analyzing the improvement of learning outcomes through lesson study. This research is a descriptive quantitative study developed at the STEM UNSYIAH Research Center and carried out at Unsyiah Laboratory High School. The instruments used in this study are validation rubric for media and material experts and Teacher Observation sheets and monitoring sheets for the increasing 21st-century character. Based on the data analysis: 1) Validation of the Moment of Inertia props from 2 media experts obtained an average percentage value of 86.4% with an excellent category. 2) Validation of Student Worksheet by two validators expert in material teaching obtained an average percentage value of 84.77% with an excellent category. 3) The teaching and learning results using teaching aids and LKPD through a Lesson Study conducted by the observer obtained a percentage with an average of 83.5% excellent category. 4) There is an increase in 21st-century character in students by 77% with an excellent category. ISLE-based STEM Learning Media is very suitable for improving 21st-century skills.
Effect of concept attainment model on student’s science process skills
Authors: Halim A , Farada S , Hamid A , Mustafa  , Nurulwati  , Mahzum E , Irwandi I 
Published: May 2021

Abstract
The research objective was to determine the effect of the concept approach model on students’ science process skills. The type of research used is experimental research with pre-experimental methods and one group pre-test post-test design. The research sample was selected for grade I at Peukan Bada Senior High School. Data collection used non-test instruments in the form of observation sheets to see students’ science process skills. The results of data analysis using the percentage formula showed an increase in science process skills from the first meeting to the third meeting. At the first meeting, the average percentage was 54.66%, which was categorized as sufficient, at the second meeting it was 76.66% which was categorized as good, while at the third meeting it was 84.47% which was categorized as very good. The indicators of science process skills with the highest improvement were observation, interpretation, prediction, and concept application. Meanwhile, the lowest indicators are classification, experimental design, and communication.
Species diversity and conservation status of marine ornamental fish traded at three market spots in the southern coast of West Java
Authors: Nuryanto A , Bhagawati D , Kusbiyanto  
Published: May 2021

Abstract
Several studies had reported marine ornamental fish are exported from Indonesia to the United States of America. However, there is no study about marine ornamental fish that has been done with particular reference to specific localities across Indonesia, mainly from the southern coast of West Java. This study aims to know species diversity and conservation status of marine ornamental fish traded in Pelabuhan Ratu, Ujung Genteng, and Taman Manalusu. Fish samples were bought from the first collector in each sampling locality. Fish species were identified morphologically according to the previous publication. A total of 93 nominal species, 22 families, and six marine ornamental fish orders were traded. The highest number of species belonged to Pomacentridae and followed by Achanturidae, Labridae, and Chaetodontidae. The remaining families consisted of one up to six species. Perciformes was the dominant order with 19 families. Most of the species are listed as Least Concern conservation status, and one species listed as vulnerable, namely Hippocampus kuda (sea horse). Our results proved that many marine ornamental fish were on the southern coast of West Java and mostly listed as Least Concern species.
Distribution and accumulation of heavy metals from waters and sediments to Scylla serrata in Segara Anakan, Cilacap
Authors: Sastranegara M H , Lestari W , Sudiana E , Oedjijono  , Nasution E K 
Published: May 2021

Abstract
Some heavy metals of Cd, Cu, Pb, and Hg polluted in Segara Anakan Cilacap, but no information on a specific heavy metal pollution in this area and an edible mud crab of Scylla serrata. The research aimed to know their distribution in this area and their accumulation of heavy metals from waters and sediments to Scylla serrata. The study was done using a survey method with purposive random sampling at six stations from Station SA-2-28 and SA-3-46 (with a high percentage mangrove canopy cover) to Station SA-2-24, SA-3-35, SA-1-10, and SA-3-16 (with a low percentage mangrove canopy cover). Three replications were done in the dry season conditions from July to September. The researcher took all samples with the water sampler tool, sediment core, and baited trap for sampling. Then, they were analyzed using Atomic Absorption Spectrophotometry (AAS) method. The result showed that the lowest heavy metals were at Station SA-2-28 and SA-3-46 and followed by Station SA-2-24, SA-3-5, SA-1-10, and SA-3-16 due to the high percentage of mangrove canopy cover, while the reserve order was due to the increased pollution in east side areas of Segara Anakan Cilacap. The heavy metal accumulation of Cd, Cu, Pb, and Hg has occurred from waters and sediments to Scylla serrata.
Degradation of phenol in batik industry wastewater using thin layer TiO2photocatalyst
Authors: Riyani K , Setyaningtyas T , Riapanitra A 
Published: May 2021

AbstractThe synthesis of thin layer TiO2photocatalyst has been performed and its performance was tested to the degradation of phenol in wastewater of batik industry. The powder of anatase TiO2 was impregnated in glass plate, so that thin layer TiO2photocatalyst was obtained. The performance test of thin-layer TiO2photocatalyst in the degradation of phenol was performed in a batch photoreactor equipped with six types of black light UV lamp (@10 watts) and a magnetic stirrer. This research has been performed at pH variation and UV radiation time. The result of this research showed that the initial concentration of phenol in batik wastewater was 3,3684 ppm. The optimum pH was obtained at pH 11 with percent degradation of 40.41%. The optimum UV radiation was obtained at 8 hours with percent degradation of 41.72%. The longer the irradiation time the more photon energy is absorbed by TiO2causes more positive holes to be formed. The positive holes will react with H2O or hydroxyl ions to form OH radicals that further break down organic compounds in waste.
Hardware-based microgrid testbed to facilitate development of Distributed Energy Resource (DER) systems for sustainable growth
Authors: Idowu Peter B. , Suryadevara Raja 
Published: May 2021

Abstract
Distributed energy resource (DER) systems that can combine small-scale conventional energy sources with diverse renewable energy options and storage are ideal for addressing electrification needs of small communities, as well as proactively mitigating negative impacts of fossil energy sources on the environment. It is therefore imperative for academic institutions that wish to play a role in addressing energy challenges for sustainable rural development to be adequately equipped with a hardware testbed for the study and analysis of DER systems. This work features a 45kW hardware testbed installation at Penn State Harrisburg, highlighting its design, construction, and its uses in academic instruction and research. A case study on electric loading characteristics of the network is presented to illustrate its relevance and the potential for its use in preparing a skilled workforce for a new energy economy.
Study on hydraulic transient process of K hydropower station with low head, large flow and complex long tail water system
Authors: Gaohui Li , Mengjie Zhang , Xiangrong Chen , Quanchun Zheng , Weijie Cui , Lei Jiang , Tianchi Zhou 
Published: May 2021

Abstract
K hydropower station is a hydraulic engineering with the main task of power generation, which is also a typical hydropower station with low head, large discharge and long tail water conveyance system. The hydraulic characteristics of these-type hydropower stations are of high water inertia, large amplitude of surge chamber water level fluctuation and poor stability of units. Therefore, due to the control requirements of the stability, the area of the horizontal section of the surge chamber is usually large, which leads to the long period of water level fluctuation of the surge chamber and the relatively long time of unit output oscillation in the transition process, and the regulating quality of the unit is often difficult to meet the control requirements due to the large inertia time constant of the water flow in the water conveyance system and the unique characteristic curve of unit. It is important to design appropriately to ensure the safe and stable operation of the hydropower station. In this paper, it is shown the process of hydraulic design of these-type stations. According to the design of K hydropower station, the simple surge chamber and restricted orifice surge chamber are compared in terms of hydraulic characteristics including the head loss of steady operation, the water level fluctuation of transition process and the stability of operation. Based on the optimized restricted orifice surge chamber, the overall calculation and analysis of the hydraulic transition process and the stability analysis of K hydropower station are carried out, it is concluded that the unit stability quality of the K power station is fine and the maximum pressure of pipe is in control, which provide strong support for the safe and stable operation of K station. The comprehensive and thorough analysis in this paper can provide reference for the design of the similar projects.
Engineering application of power generation technology for adding and reducing silt in multi-sediment reservoir
Authors: Zhou Heng , Li Yongqing , Xing Ruijiao , Di Shengjie , Lu Xi , Sun Haitao 
Published: May 2021

Abstract
The uncoordinated relationship between water and sand is a major technical problem that has not been completely eradicated or resolved in the construction of water conservancy and hydropower in the world. In response to the problem of sedimentation, scientific research, design and operation units have carried out research and application of key technologies for the addition of sediment-laden reservoirs to reduce siltation and power generation. The research results have been successfully applied to the Liujiaxia Tao River Mouth Desilting Tunnel and Machine Expansion Project. The Liujiaxia Reservoir has successfully solved the sediment discharge and silt reduction, increased the effective storage capacity of the reservoir, improved the power generation efficiency of the reservoir, improved the water quality of the reservoir, and provided support for the long-term spatial deployment of water resources.
Study on the reinforcement effect of bolt in the artificial dam of underground reservoir in Wulanmulun mine
Authors: Shan Ren-liang , Liu Shuai , Kong Xiang-song , Liang Chen 
Published: May 2021

Abstract
With the exploitation of a large number of coal resources in Western China, the phenomenon of local water shortage has become increasingly prominent. In order to protect water resources, coal mine underground reservoir came into being. In the underground reservoir of coal mine, the stability of artificial dam is often the key to the water storage. In order to enhance its stability, steel structure is often arranged inside the artificial dam and connected with the bolt arranged in the cut, so that the artificial dam and the surrounding rock form a whole and play the role of water storage and blocking together. However, the effect of this reinforcement structure still needs to be further studied. Therefore, this paper takes Wulanmulun mine as the engineering background, mainly uses FLAC3D numerical simulation software to analyze the effect of reinforcement structure, and finds out the relatively reasonable bolt size. The results show that: the artificial dam and surrounding rock are more stable and safe under the reinforcement of bolt, increasing the size of bolt will reduce the displacement and plastic zone range of cut in the side, especially increasing the size of bolt at the top and bottom will have better effect.
Dynamic Analysis of a Tripod Offshore Wind Turbine under Earthquakes
Authors: Luo Chengxi , Liu Yingzhou , Zuo Jingjing , Wang Wenhua 
Published: May 2021

Abstract
Earthquakes are non-negligible hazards for the designing of offshore wind farms in the coastal regions of China, such as Bohai Bay. So, it is necessary to analyze the response of offshore wind turbines (OWTs) under earthquakes. Fluid mechanics are applied to the model, the interactions of sea water and the substructure are based on fluid theory analysis in this paper. Moreover, it takes into account of the influence of fluid-solid coupling effect, radiation effect of wave loads and pile-soil interactions on the OWT. By establishing the finite element model (FEM) and dynamic equation of a tripod OWT, the measured onshore and offshore seismic waves are applied in the finite element analysis of the Tripod OWT respectively, and the numerical analysis of a tripod OWT structure under different measured seismic waves is carried out. More detailed comparison of the differences between onshore and offshore seismic waves is carried out in the paper. The result shows that the offshore seismic waves stimulate more significant responses than the onshore one, which can be attributed to that abundant seismic frequencies are found around the fundamental frequencies of the OWT. the seismic response analysis is conservative by using the onshore seismic waves, however, using the offshore seismic waves is closer to the actual situation.
Catalytic Effects of Red Mud and Acidithiobacillus ferrooxidans on Biodissolution of Pyrite
Authors: Lin Mo , Yang Baojun , Lin Hao , Liu Shitong , Wang Jun 
Published: May 2021

Abstract
The catalytic effect of red mud on biodissolution of pyrite was studied with Acidithiobacillus ferrooxidans in this study. Dissolution and results showed that red mud could significantly promote pyrite biodissolution. The bacterial group with 4g/L red mud had best dissolution effect. The iron extraction rate in the group was 47.9% higher than the control group. Red mud in sterile group could inhibit pyrite dissolution. The iron extraction rate in the group with 8.0g/L red mud was 75.4% lower than the control group. The biodissolution results indicated that red mud could accelerate pyrite dissolution by promoting electron transfer in biodissolution system and enhancing the growth of A. ferrooxidans.
Accumulation characteristics of tight sandstone gas reservoirs in the Upper Paleozoic in the Shenfu block of the Ordos Basin
Authors: Jiang Lei , Zhou Ronghai , Li Gang 
Published: May 2021

Abstract
The Shenfu gas field on the eastern margin of the Ordos Basin is one of the key blocks of CNOOC’s land tight sandstone gas field development in recent years. In order to further analyze the physical properties and accumulation and evolution characteristics of the Upper Paleozoic tight sandstone gas reservoirs in the Shenfu block, we characterized of the reservoir pore structure, diagenetic evolution, and natural gas accumulation stages, combined with fluid inclusions, the types of tight sandstone gas reservoirs in the Upper Paleozoic are studied, revealing the main controlling factors for the natural gas accumulation in the study area. Studies have shown that the core porosity of tight sandstone reservoirs in the Upper Paleozoic in the Shenfu block is less than 10%, and the permeability is less than 1mD. Compaction and cementation are the main factors for reservoir tightness. The results of porosity evolution and homogenization temperature of fluid inclusions indicate that the Upper Paleozoic sandstone tightness is formed during the Middle-Late Triassic-Early Jurassic, which is earlier than the Late Jurassic-Early Cretaceous period of large-scale natural gas accumulation.
Research on the Application of Geological Forecast in Coal Mine Safety Production
Authors: Wang ZHonghua 
Published: May 2021

Abstract
In order to realize coal mine safety production, it is analyzed the importance of geological forecasting in coal mine safety production from three aspects: the close relationship between geological forecast and safety production, the guiding significance, and the occurrence of accidents. It applied successfully to three aspects:geological forecasting to fault prediction, outburst disaster prevention, and mining plan design. It is of great significance to the safe production of Shangzhuang Coal Mine.