bluuebunny/crossref_metadata_2025_split huggingface dataset:
Higher Order Thinking Skills and Students Ability to Use Technology on Integral Topic
Authors: Kurniawan Prihadi , Wahyuni Arie , Waluya S. B. , Nur Cahyono Adi 
Published: July 2020

Abstract
This is a qualitative research that exposed the students’ higher order thinking skills (HOTS) and how they use the technology when solving a problem in calculus lecture, especially in integral topic. Autograph software is used as a new integrated technology on learning process. The samples used in this research are 8 mathematics students in second year of Mathematics Department, Ivet University. Students who are able to solve a problem and able to use their knowledge to a new situation, are the one who have high score in HOTS. How student use their knowledge to a new situation is based on how they use the autograph to construct their idea on integral basic studies.
Study Fabrication Dye Sensitized Solar Cells Using The Combined Organic Polymer Poly (3-Hexylthiophene) P3HT With Extracts Dye Natural Organic
Authors: Darmawan Muh.Iman , Basransyah  , Rahayu Susanti Dwi 
Published: July 2020

Abstract
Energy derived from fossil the decrease and cannot renewable. Thus many experts looking at other alternatives to create new energy that is renewable and dye-sensitized solar cells (DSSC) is one of them. The study aims to determine the characteristic of the electrical properties of each dye material natural organic, characteristic of the electrical properties of the dye material combined with Poly(3-Hexylthiophene) (P3HT). Sample testing conducted at the Laboratory of UV-Vis Spectroscopy, P3HT electrical properties combined with dye extracts will be investigated using IV Meter El - Kahfi. Test optical properties, electrical properties, and I-V characterization of the DSSC using UV Visible Spectrophotometer 1601 PC and Keitlay Type 2600A, respectively.
Application of Pyrolysis Technology as an Effort to Reduce Plastic Waste
Authors: Basransyah  , Putra Agus Muliadi , Iman Darmawan Muhammad 
Published: July 2020

Abstract
The problem of waste in the tourism area is one of the crucial issues that must be addressed immediately. The performance of the waste management system is not optimal, marked by the number of waste that is not managed properly in the tourism area. The purpose of this study is to conduct a study of the generation and composition of waste in general and to determine the potential and appropriate handling of plastic waste. The Pananjung Village as a beach tourism destination of waste generation as much as 5387.83 kg/day with a source of non-domestic waste generation in the form of hotels, restaurants, homestays, traders, street, beach, and tourists. The total composition of plastic waste 10.11% which is divided into two groups of plastic. The recycled plastic group is Polyethylene Terephthalate (PETE) plastic 1.62%, 0.02% High-Density Polyethylene (HDPE), 0.53% Polypropylene (PP) type, 2.16% Polyethylene (PE) type, this plastic handling is recycled by made new plastic products according to its type. While the types of plastic that cannot be recycled include 2.14% Plastic Bags, 0.34% Polystyrene (PS) and 3.30% other types of plastic. Plastic bag handling is done by pyrolysis technology. Fuel oil from the plastic bag pyrolysis process is included in the category of gasoline with C5 to C12 hydrocarbon chains.
Management of issue and public trust using information technology
Authors: Amy Najamuddin , Muchali Anggreni , Budiarto Jian , Maulachela Adam Bachtiar , Ashril Rizal Ahmad 
Published: July 2020

Abstract
In the era of public information disclosure, the need for public relations performance that is fast and transparent is needed in all sectors of the company, including the scope of the Provincial Government of Nusa Tenggara. The role and function of human resources and public relations institutions of the NTB provincial government have become strategic in the context of fulfilling educational information. The purpose of this study is to manage issues and public trust using information technology in West Nusa Tenggara. Management of the issue is carried out using a management mechanism called Media Control and Cooperation (MCC) and 2 (three) applications based on artificial intelligence, namely: Data & Public Information Services (DPIS) and Government Social Media Handling (GSMH). Based on studies that have been done, it can be informed that overall PRCC NTB Public Relations succeeded in gathering valid issues 22 to 24 or 91 percent.
Ethnomathematic Worksheet by Scientific Aproachs
Authors: Hirzi Ristu Haiban , Gazali Muhammad 
Published: July 2020

Abstract
The purpose of this research is to develop worksheet based Ethnomatematics with Scientific approaches to improve outcome learning mathematics in secondary school that valid, practical and efective. Development of learning models in this study using ADDIE development model, because it has a simple stage, but clear and understandable. The model consists of five main stages, namely (Analysis, Design, Development, Implementation, and Evaluation). Tests performed on the class VII B Mts Riadlul Jannah NW Penjor. Based on the analysis of the trial showed that the worksheet based Ethnomatematics with Scientific approaches to improve learning outcomes mathematics in secondary school meet the criteria for a valid, practical and effective. Criteria of validity can be seen from the analysis results that meet the criteria of validity worksheet very valid acquisition of the actual total score of 313 out of a maximum score of 375. Criteria of practicality can be seen based of results teacher’s assessment analysis and the results of analyzing the response of students who meet the criteria are very practical based on the assessment of teachers with the acquisition of the actual total score of 123 out of a maximum score of 135 and has achieved practical criteria is based on the students’ responses with the percentage of 88.33% of standards. Criteria for effectiveness and results from analysis ≥ 75% student achievement test which student learning outcomes have achieved an average score of 67.5 or value is above the minimum of thoroughness criteria (KKM) 65 and the percentage of classical completeness reached 83.33% of the standard 75%.
Problem-based learning of teaching aids Development “linear program board” in improving student learning outcomes
Authors: Wardi Zaotul , Hidayah Nurul 
Published: July 2020

Abstract
The purpose of this study is to improve student learning outcomes using PBL-based PAPROLIN teaching aids on linear program material. This research is research reseach and development (RnD). Then the object in this study is the PAPROLIN teaching aids and the PAPROLIN teaching aids manual, lesson plans and instruments used for research. Data collection techniques in the form of student response questionnaires, product validation by experts, subject teachers and learning outcomes tests. The results of the PAPROLIN teaching aid guidebook assessment by material experts are a total score of 89 with an average value of 44.5 in the range of 74.76 <X ≤ 92.28 so that validity is categorized well, while the assessment of the PAPROLIN teaching aids manual by the subject teacher is 86 with an average value of 43 in the range of 74.76 <X ≤ 92.28 so that validity is in the good category. As for product trials that are carried out in two stages, namely small-scale trials and large-scale trials, where the results of small-scale trials are 22.22% and large-scale trials are 61.09%. So it can be concluded that PBL-based paprolin teaching aids can improve mathematics learning outcomes in LINEAR PROGRAM subjects
The Card Logic Logarithm as an Interactive Media in Teaching Logarithm: a Development Study
Authors: Satriawan R , Endriana N , Irianto F A , Ahyan S 
Published: July 2020

Abstract
This study aimed to develop an interactive media namely card logic logarithmic (CLL) that are valid, practical and have the potential effect of increasing student interest and learning outcomes in learning logarithm in Senior High School. The developmental research method by Van den Akker used in this study, with a formative evaluation by Martin Tessmer. The Jan Van Den Akker’s method consists of three stages, namely preliminary research, prototyping stage, and formative evaluation. Based on the results, it was found that: (1) the CLL media have been produced for teaching logarithm which are valid, practical, and effective; (2) the CLL media have been assessed by validators with a validity value of 4.54 with a valid category; (3) the CLL media have been assessed by validators with a practical value of 4.28 in the very high category; and (4) the CLL media in the aspect of effectiveness based on the learning outcomes test showed 87.1% of students scored above the standard.
The Development of Constructivist-Based Junior High School Mathematic Worksheet (LKS) on the Polyhedron
Authors: Reflina  
Published: July 2020

Abstract
The LKS(worksheets) that are used in schools generally only contain questions, so they have not helped the students in constructing mathematical knowledge. Therefore, constructivist-based LKS is developed for learning mathematical knowledge. This study aimed to develop constructivist-based LKS on the subject of Polyhedronand to see the validity of the produced worksheets. This research was a research development using a 4-D model. This model consists of the stages of define, design, and disseminate. Data collection was carried out through validation and trial of the developed LKS. Validation was carried out by 3 validators who are experienced in their fields and the trials were conducted on grade seventh of SMP Negeri (Public Junior High School) 1 Kubung to determine the practicality and effectiveness of the LKS. This study produced constructivist-based LKS on the subject of Polyhedron. The validity of the LKS was categorized as very valid. Validity test that was carried out consisted of several aspects, namely aspects of content / material, form / presentation and language / legibility. The validation results showed that theLKS was very valid with an average value of 3.42. The practicality test results in aspects of the attractiveness of the LKS to student interest, ease of use and content, and the efficiency of time showed this constructivist-based LKS was very practical for students and teachers with an average value of 89.14% and 79.25%.
The Role Of Mathematical Literacy To Improve High Order Thinking Skills
Authors: Maslihah Siti , Waluya S.B. , Rochmad  , Suyitno Amin 
Published: July 2020

Abstract
Mathematical literacy is the ability of individuals to formulate, use, and interpret mathematics in various contexts. NCTM has formulated 5 competencies in mathematics learning, namely mathematical problem solving, mathematical communication, mathematical reasoning, mathematical connection, and mathematical representation. These five abilities are included in mathematics literacy abilities and must be possessed by all students. High-level thinking is a thought activity that includes aspects of problem solving, critical, creative, metacognitive to achieve certain goals, which in the domain of Bloom’s Taxonomy conducts the analysis, synthesis and evaluation of a problem. The ability of mathematical literacy will encourage students to be able to think at a high level because in mathematics literacy students will be required to use all critical and creative thinking to be able to formulate and interpret mathematics in various contexts so that the highest level of mathematical skills (level 6) can be achieved.
Analysis of Students’ Creative Thinking Skill in Solving Algebra Problem
Authors: Nugroho Sri Wahyu Purnomo , Riyadi  , Triyanto  
Published: July 2020

Abstract
This study aimed to describe the students’ creative thinking skill in Junior High School to solve the problems in two-variable linear equations system. The indicators of creative thinking skill included fluency, flexibility, and novelty. This research was a qualitative descriptive study with 8 students in SMP N 4 Playen Gunung Kidul as the subject. The data collection used in this research was tests that were adjusted to some indicators of creative thinking skill. Researchers also conducted validated interviews by using triangulation methods. The results showed that 12.5% of students conformed with two indicators of fluency and novelty (it could be categorized as creative), 37.5% of students conformed with one indicator of flexibility or novelty (it could be categorized as adequate creative), and 50% of students conformed one indicator of fluency (it could be categorized as less creative). Based on the results, it could be concluded that most of students were categorized as less creative. This was caused by the difficulty of students in changing the story questions into mathematical form, misunderstanding of algebraic concepts, and lack of practice working on problems that refers to students’ creative thinking skill. Therefore it was necessary to emphasize the understanding of algebraic concepts and the appropriation of questions based on the students’ creative thinking skill.
The Learning Tools development of Rectangular and Square Material Oriented toward the Learning Cooperative Setting and included Bruner Theory on Students
Authors: Rusdi T M. , Djafar Hamsiah , Latuconsina Nur Khalisah , Suaidah Idah , Pamungkas Megita Dwi , Kusumayanti Andi 
Published: July 2020

Abstract
The purpose of this study is to produce valid, practical, and effective mathematics learning tools on rectangular and square material which oriented toward cooperative setting learning and included Bruner’s theory in VII grade students of State MTs of Bontotangnga, Bulukumba Regency, South Sulawesi. This type of research was a research and development that produced learning tools consisting of Lesson Plan (RPP), Handout (BS), and Student Worksheet (LKS). The subject in this research was 25 students of VII grade of State MTs of Bontotangnga Bulukumba regency, South Sulawesi in the academic year 2018/2019. The mathematics learning tools development, which used, refered to the Thiagarajan 4-D model. The learning development approach system carried out includes 4 stages such as, define, design, develop, and disseminate. The data collection instruments were the learning device’s validation sheets that aimed to obtain the experts and practioners validation data regarding the Lesson Plan (RPP), Handout (BS), and Student Worksheets (LKS). The student activity observation sheet aimed to obtain student activities data during the learning process by using cooperative setting learning tools which included Bruner’s theory that have been developed. Meanwhile, the learning outcomes tests aimed to measure the cognitive aspects of students in the form of a description test. The data analysis technique used was validity, practicality and effectiveness data analysis. The results showed that: (1) Lesson Plan (RPP) and Student Worksheet (LKS) were categorized as very valid. Meanwhile, the Handout (BS) were categorized valid, (2) Practical, based on the observations, the learning device was well-implemented in the trial process, and (3) effective. Hence, this has fulfilled the three criteria such as, the effective student activity, the responses toward the positive learning, and mastery learning classically achieved.
Calcium phosphate nanoparticles as intrinsic inorganic antimicrobials: mechanism of action
Authors: Wu Victoria M , Huynh Eric , Tang Sean , Uskoković Vuk 
Published: July 2020

Abstract
This is the final report of the study aimed at assessing the antimicrobial activity of calcium phosphate (CP) nanoparticles delivered in the form of hydroxyapatite (HAp) or amorphous CP (ACP) and understanding the fundamental principles behind their mechanisms of action. Not responding to propidium iodide and causing no gross morphological changes except moderate stress-induced filamentation in Escherichia coli (E. coli), CP nanoparticles were shown to be bacteriostatic, not bactericidal. Also, the lack of expression of genes involved in DNA repair indicated no genotoxic activity. In contrast, the softening of amide infrared bands and the partial dissociation of lipopolysaccharide structures comprising the membrane of Gram-negative Pseudomonas aeruginosa (P. aeruginosa) was detected in a vibrational spectroscopic analysis of the nanoparticle/bacterium interaction. Similarly, the inhibition of the growth of Staphylococcus aureus (S. aureus) was paralleled by a reduced integrated intensity and the softening of the C = O ester carbonyl stretch in lipoteichoic acid, a major component of the Gram-positive cell membrane. Electron microscopy analyses confirmed that changes to the cell membrane are a major mode of action of CP nanoparticles. While HAp got internalized by E. coli significantly more than ACP, the membrane damage was more pronounced in ACP-treated bacteria, which was explained by the higher surface reactivity of ACP. HAp nanoparticles decreased the activity of overexpressed efflux pumps in methicillin-resistant S. aureus, suggesting that they may hijack these pumps and use them to enter the cell without producing any visible damage to the membrane, thus acting on the cell from the inside out, as opposed to ACP, whose action is mostly external in mechanism. This may explain why HAp, unlike ACP, suppresses the mechanisms of resistance in methicillin- and multidrug-resistant S. aureus and P. aeruginosa, respectively. The findings of this study will be essential in the optimization of these nanoparticles for becoming an alternative to less biocompatible inorganics and small molecule antibiotics in the global effort to curb the rising resistance of bacterial pathogens to the existing therapies.
Design of the Test System for the Ability to Withstand the Overload Current of the Low Voltage Control Equipment Applied in Coal Mines
Authors: Zhang Hongkui , Ni Rui , Zhu Shuming 
Published: July 2020

Abstract
On the basis of the development prospect of energy industry and the safety production situation of coal mine, the composition structure and working principle of low-voltage control equipment applied in coal mines were analyzed, and the electric power and thermal effect theory of low-voltage control equipment applied in coal mine were studied, and the design scheme of overload resistance test system was put forward, meanwhile, the flameproof electromagnetic starter for coal mines was tested according to the coal industry standard. The test results show that the design of the overload tolerance is reasonable.
An empirical analysis of the influence of typical highways in the Sanjiangyuan Protected Area on wetlands
Authors: Sun Haixiu , Zhao Yuanpeng , Wang Zhengyun , Zheng Tianli 
Published: July 2020

Abstract
Wetlands play an important role in water conservation and biodiversity accumulation. The crossing highways may cut off the water flow relationship between wetland patches, and further influence wetland ecosystems. In this study, we investigated the situation of wetlands based on field survey, aerial photographic and remote sensing image interpretation along two roads (Gongyu Expressway and S308 road) in the Sanjiangyuan Part. We found that there were only two places exhibits a different wetland image at the either side of the road. Road construction basically did not obstruct wetlands. It was also noted that by improving existing culverts, measures could be taken to avoid or alleviate such phenomena.
Analysis of the Performance Improvement Effect of Combined Packing for Oil and Gas Well Packer
Authors: Liu Huifeng , Zhang Wei , Cao Yinping , Dou Yihua 
Published: July 2020

Abstract
Packer is a commonly used downhole tool for oil and gas wells. In order to understand the working performance of combined packing, a finite element analysis is performed on the double expansion-compression-expansion combined seal packers to find the effect of combined seal. Taking packers sealed in casing with a diameter of 114.3mm and a wall thickness of 12.7mm as an example, finite element models are established for double expansion and expansion-compression combined seal packers respectively. By applying packer-setting pressure to the finite element models and processing the strain-stress data resulting from finite element analyses, the distribution rules of packing stress and contact pressure between the packing and the inner casing wall for different combined seal packers are obtained. The working performance of the single expansion seal packer and the double expansion and expansion-compression combined seal packers is compared and analyzed. According to the results of finite element analyses, both double expansion combined seal and expansion-compression combined packings can be in effective contact with the casing under a packer-setting pressure of 15MPa, and the contact pressure between the combined seal packing and the inner casing wall is larger than that of a single seal packing. The combined seal packer therefore can actually improve the sealing and packoff effect of the packer. The expansion-compression combined seal has the highest pressure bearing capacity, which is 50% higher than that of the single expansion packer. The lower packing of the double expansion combined packer and the expansion packing of the expansion-compression combined seal packers should be appropriately strengthened and thickened to improve the packing performance of the combined seal packer. The results of contrastive analysis reveal the improvement effect of the sealing and packoff performance of the combined seal packers, which can be used as a reference for the improved design of such packer.
Comparative study of slope stability of a highway constructed in hilly area using limit equilibrium and finite element methods
Authors: Khan Muhammad Israr , Wang Shuhong 
Published: July 2020

Abstract
Slope stability analysis is one of the most challenging field in which the slope factor of safety is the main concern. Normally limit equilibrium and finite element methods are used to analyse such slopes. A variation in the result is also found in both these analysis methods. This analysis work is done using both limit and finite equilibrium methods. The variation in the factor of safety is investigated and a correlation is developed. These values can be used to know about the safe value for factor of safety in any homogenous slopes.
Study on coal quality development and application in Hetaoyu coal mine
Authors: Qi Huili , Gai Ke , Ma Dongping , Liang Xianfang , Sun Ning 
Published: July 2020

Abstract
Based on the research at home and abroad, the development and application of coal quality in Hetaoyu coal Mine was studied in this paper. We focus on the coal quality development, application process in accordance with local conditions, improving coal quality utilization rate, and environmental protection. The quality data of Walnut Valley coal are analysed. Some Suggestions on the development and application of coal quality are put forward.
Research on Combined Method of Sedimentary Facies under Multiple Conditional Constraints
Authors: Qiao Shasha 
Published: July 2020

Abstract
When we were studying the oil field, this article described the morphology, scale, and connectivity of sand bodies by observing the combination of sedimentary facies in the oil field. At the same time, we also found that the sand body is related to the origin, distribution, physical properties, and Changes in heterogeneity, etc., these factors play a crucial guiding role in the development and adjustment of oil fields. However, in specific phase belt combinations, subjective influence factors are relatively large, and the phase belt maps of oilfields have certain limitations in the development adjustment process. In this paper, the sedimentary facies of the Sapu oil layer in the Harwin Oilfield are re-understood through various constraints such as regional sedimentary environment, well-seismic combined reservoir prediction results, and the matching relationship between fluids and structures on the plane. We make the combination of facies zones more reasonable. Accurate, providing a basis for adjustment of oilfield water injection development.