bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on head-neck injuries of pilots during emergency ejection from the aircraft
Authors: Song Run-Zi , Suo Shuang-Fu , Jia Xiao-Hong , Liu Yue , Liu Song-Yang 
Published: June 2019

Abstract
This paper established a multi-body dynamics model of head-neck using LifeMod. To explore the damage of pilots’ head-neck during the ejection process, we used the established model to do simulation combined with the seat and helmet multi-body model. The head-neck model was validated through the volunteer frontal-collision and rear-collision tests, whose head acceleration, displacement curve and response time are in good agreement with the experimental data. The simulation showed that the head-neck is the most vulnerable to injury, when the head lean forward to the limit position and collide with headrest due to airflow. The results of various simulation calculations implied the head-neck protective device should be installed to avoid pilots’ neck damage in the ejection.
Research on Association of 95598 Customer Service Work Orders Based on Sequential Frequent Pattern Mining
Authors: Xin Xu , Jun Fu , Zhijie Sun , Li Wang , Xiaowei Liu. , Zhiguo Li. 
Published: June 2019

Abstract
With the continuous development of social economy and people’s living standard, people’s demand for electricity is also increasing day by day, as well as the demand for power supply capability of power supply enterprises and service level of staff. This has brought greater pressure and challenges to power supply enterprises, and the most prominent challenge is how to deal with customer complaints. In order to reduce customer complaints, it is necessary to predict whether customers will complain in the future according to the call track of customers who have already reflected their demands. Therefore, in complaint prediction, frequent pattern mining based on customer call track is particularly important.
Technical Analysis and Application Scene of Blockchain Society
Authors: Si Wen , Zhang Jiankang 
Published: June 2019

Abstract
There are many problems in the current social, it’s urgent to build blockchain society. As a distributed consensus system, blockchain can effectively solve four problems: storage, transmission, expansion and consensus. Especially the blockchain system has the characteristics of decentralization, its information is open and can not be tampered with. Its data exchange is based on cryptography to ensure the accuracy of the data. Blockchain technology can also enhance the efficiency of notarization and certification. These advantages make the blockchain society a necessity for the development of blockchain technology and a model for the transformation of social production and life style. Its application scenarios includepayment of remittances, free trade, equity settlement, intelligent contracts, authentication, audit profession, crowd-funding, bill business, asset-confirming and intelligent Internet of things, etc.
Analysis of Flowing in the Immersion Fluid Field under the Oscillatory Motion of the Silicon Wafer
Authors: Zheng Liang , Chen Yu 
Published: June 2019

Abstract
Immersion lithography has been leading the technology nodes to the sub-20nm regime in recent years. To extend immersion lithography to the sub-10nm technology nodes, the immersion liquid must remain highly pure and flow stably. In immersion lithography, a step-and-scan exposure system is utilized in which the silicon wafer is under an oscillatory motion during the exposure process. It could cause the non-constant flowing of the immersion fluid which affects the stable status of the immersion field and hinders the recycling of the immersion liquid. In this paper, effects of both scanning and stepping motions of the silicon wafer on the flowing of the immersion field are investigated and technical guidance can be obtained to have a high-quality and stable-flowing immersion liquid during the exposure process in the end. Results in this paper can provide theoretical and technical support to the further development of immersion lithography in the near future.
Investigation of Photothermal Effects on the Liquid Field during the Exposure Process in Immersion Lithography
Authors: Zheng Liang , Chen Yu 
Published: June 2019

Abstract
Immersion lithography has been extending technology nodes to the sub-20nm regime of semiconductor manufacturing. Keeping the immersion liquid pure and uniform as well as avoiding residual droplets during high speed scanning motion are two challenges faced by the development of immersion lithography. During the exposure process of immersion lithography, the heat of the incident beam may cause the temperature rise of the immersion fluid which could result in the image placement on the silicon wafer. For this reason, the photothermal effects of the immersion fluid field during the exposure process are investigated in this paper to ensure the high-quality and stable-flowing of the immersion fluid, and consequently the accuracy of the pattern image transferred on the silicon wafer. Results obtained in this paper can provide solid guidance and definitely accelerate the development the immersion lithography in the sub-20nm regime.
Research of Circuitous Hole Structure of Mineral-collagen Fibers in Tibia
Authors: Liu Yuxi , Li Aihua , Chen Bin 
Published: June 2019

Abstract
Through the observation of the microstructure of the longitudinal and transverse sections of the tibia, it is found that the distribution of mineralized collagen fibers is layered. There are many biological micropores in the cross section of the tibia, and the mineralized collagen fibers near the pores bypass the pores in an orderly manner, thereby forming a mineralized collagen fiber circuitous hole structure. According to the observation results, a finite element analysis model of fiber reinforced composites with fiber circuitous hole structure and drilling hole structure is established. The analysis results show that the maximum strain of the drilling hole structure and fiber circuitous hole structure are 6.428e-3 and 3.583e-3, respectively. The maximum strain of the drilling hole structure is about 1.8 times that of the fiber circuitous hole structure under the same load. The results have shown that the fiber circuitous hole structure of tibia has an excellent resistance to deformation, which can effectively improve the toughness of the tibia. The application of the structure to the composite material can effectively improve the strength of the composite material.
Motion control analysis of hybrid grinding and polishing machine tool for blade finishing
Authors: He Qiuwei , Zhang Chaopeng , Wang Xin , Qu Xingtian 
Published: June 2019

Abstract
Blade is the key component in the energy power equipment of turbine, aircraft engines and so on. Research on the process and equipment for blade finishing becomes one of important and difficult points. The motion control of hybrid grinding and polishing machine tool is different from that of traditional machine tool, and there exists motion coupling phenomenon when it moves as a whole. In order to control precisely motion of machine tool, the inverse and forward kinematics solution considering motion coupling of parallel mechanism was solved based on designed hybrid grinding and polishing machine tool for blade finishing in this paper. Firstly, the coupling factor of parallel mechanism was taken into account in the new model, and the inverse kinematics solution was modified to improve the solution accuracy. Then, the forward kinematics solution of machine tool based on inverse kinematics solution was solved. Finally, the motion simulation was made to verify the inverse and forward kinematics algorithm based on kinematic coupling factor of parallel mechanism by simulation software ADAMS. The simulation result shows that the inverse and forward kinematics solution deduced is correct, which provides theoretical basis for the motion control scheme of machine tool calibration and inspection control system.
Theoretical analyses of mechanical performance of higher-order vertex-based hierarchical square cell structure subjected to compression
Authors: Shi Chong , Wang Zhonggang 
Published: June 2019

AbstractHierarchical structure has gained great popularity in recent years, due to its significant promotion on structural strength and stiffness. In this study, the concept of high-order vertex-based hierarchy structure (VHS) was incorporated based on the new-rising multi-cell square tubes by replacing every vertex with scaled itself, layer by layer. The theoretical solution of VHS structure subjected to static compression has been conducted, based on the classical Super Folding Element. Mean crushing force ( MCF, P ) and energy absorption E have been calculated theoretically. The innovative finding lies that the relationship of the mean load between case leverito leveri+1 has been determined. The relationship of the mean load between case leverito lever i+1 mainly related to the cell number and length scale. All these achievements shield a light in aid to design novel thin-walled and light-weight energy absorption device.
Empowering Student’s Metacognitive Skill Through Cirsa Learning
Authors: Djamahar R , Ristanto R H , Sartono N , Ichsan I Z , Darmawan E , Muhlisin A 
Published: June 2019

AbstractMetacognitive skill is the process of thinking about thinking, process of developing self-awareness, the ability to self-assess and how to learn and solve the problems at hand. An important dimension to the metacognitive process is the knowledge of thinking skills in planning, regulating, and evaluating an academic task. Metacognitive skill can be trained using a learning model, one of which is Cirsa, a learning developed by integrating a CIRC-based scientific approach. This study aims to measure and know the effect of Cirsa learning on students’ metacognitive skill. The research method used is quasi-experiment using pretest-postest nonequivalent control group design. The study involved 248 students, 8th grade on Biology subject at MTS Al Hidayah Citaringgul Bogor as the research sample. The development of metacognitive instrument refered to MAI (Metacognition Awareness Inventory). The results showed that Cirsa learning model had an effect on the students’ metacognitive ability with the sig value. of 0,000. Cirsa learning proved superior to CIRC (Cooperative Integrated Reading and Composition) and conventional learning on human digestive and excretory system topics. Teaching Biological topics with a scientific approach is a demand in the K-13. Therefore, the authors suggest teachers to develop students’ metacognitive skill with Cirsa learning which emphasize on reading and scientific-based activities.
Implementation of Problem Based Learning Combined With Think Pair Share In Enhancing Students’ Scientific Literacy and Communication Skill Through Teaching Biology in English Course Peerteaching
Authors: Wicaksono R S , Susilo H , Sueb  
Published: June 2019

AbstractBased on previous researches, it was known that deciding a proper learning strategy is crucially needed to foster students’ 21stcentury skill through learning activities. This research is a classroom action research with two cycles and uses Lesson Study approach. This research aims to understand the implementation of PBL combined with TPS in enhancing students’ scientific literacy and communication skill. In this research there were one model teacher, four observers and twelve students as subjects. The first cycle was conducted in March 6th2018 while the second cycle was done in April 4th2018. Instruments used in this research are observation sheet for observers, worksheet with scoring rubric to measure students’ scientific literacy skill and students’ learning experience questionaire for students using Likert scale. The results show that students’ scientific literacy skill is increased from 50% in cycle 1 into 79% in cycle 2. Students’ communication skill is also increased from 54% in cycle 1 into 70% in cycle 2. Results from observers show that PBL combined with TPS enhances student’ learning activities and communication skills in class. It can be concluded that the implementation of PBL combined with TPS enhances students’ scientific literacy and communication skill.
Chemistry Teachers’ Views about Scientific Inquiry: A Study in East Java Province of Indonesia
Authors: Muntholib  , Pratiwi Y N , Yahmin  , Parlan  
Published: June 2019

Abstract
Scientific inquiry is a part of scientific literacy which is probably one of the main goals of science education. This paper reports a preliminary study on chemistry teachers’ understanding about scientific inquiry carried out using a Questionnaire of Views about Scientific Inquiry (VASI) with background of chemistry knowledge. Sample of the study is 32 chemistry teachers of senior and vocational high schools. Results showed that (1) the chemistry teachers held more informed views than science teachers reported in the previous study and (2) the pattern of chemistry teachers’ understanding about aspects of scientific inquiry is the same as senior high school students’ understanding. These indicate that (1) the complexity of leraning material people learned may be influences their inference ability and (2) the first year university chemistry students’ understanding of scientific inquiry are the strengthening of the perception they get from their teachers when they were school students.
Perception of Primary Mathematics Teachers on STEM-oriented Teaching and Learning
Authors: Mustam A A , Adnan M 
Published: June 2019

Abstract
This study aims to examine the perception of primary school mathematics on science, technology, engineering and mathematics STEM-oriented teaching and learning. The main focus of the study was on teachers’ perceptions towards STEM teaching and learning from aspects of general perception, training, implementation and STEM teaching information. Secondly, to identify the challenges faced by teachers during the implementation of STEM in the classroom. The sample for this study is 40 primary school math teachers throughout the country who answer random questions the Google form. The data were analysed using descriptive analysis. The findings show that early perception of STEM teachers is positive and teachers are prepared to face STEM teaching and learning process. Despite the challenges faced by the respondents, they are still working to teach in accordance with the curriculum prepared by the Ministry of Education Malaysia.
Mathematical Representation of Cerebral Palsy Students in Constructing the Concept of Plane Geometry Based on APOS Theory
Authors: Wulandari E D , Hidayanto E , Subanji  , Rahardi R 
Published: June 2019

Abstract
Mathematical representation is needed in conceptual understanding, solving mathematical problems, and communicating mathematical ideas by students. This research describes the form of Cerebral Palsy students’ mathematical representation which appear when solving a problem related to the concept of plane geometry. The emerging representation consists of four stages of mental construction namely action, process, object and scheme (APOS). Student work is influenced by physical and psychological conditions in which Cerebral Palsy has limitations in writing, speaking, or performing other acts in the learning process. The work result of the students studied, it appears that there are 3 types form of representation used, they are verbal representation, representation of mathematical expression, and visual representation. In verbal representations, there are complete mental constructs, namely actions, processes, objects and schemes. In the representation of mathematical expressions, and visual representations, mental construction only reaches the object stage. Stage action, the subject mentions what is known and asked from the question. Process stage, shows the ability of the subject to explain the way used in solving the plane geometry problem. Stage object, subject using verbal representation, visual as well as mathematical expression. The scheme stage, the subject associates the multiplication concept with the plane geometry area.
Development of Android Based Instructional Media of Algebraic Tiles for Quadratic Equation
Authors: Irianti O F , Qohar A 
Published: June 2019

AbstractThis research and development aims to develop the android based instructional media of algebraic tiles for quadratic equation. The media created must meet the criteria of valid, practical, and effective to assist the student in understanding the factoring in quadratic equations. The research model used in this research is 4D model developed by Thiagarajan. This model is used and modified into 3 stages only, those are (1) define stage; (2) design stage; and (3) development stage. The resulting product is named FICTION (Factorization of Quadratic Equation) which has apk as it’s extension and can be deployed and installed on a minimum android-based smartphone on version 4.0 / 4.1 (Ice Cream Sandwich). After trials, it can be conclude that FICTION is valid with level of validity 3.83, practical with level of practicality 3.1, but ineffective because none of students could pass the score minimum criteria.
Level of Students’ Creative Thinking in Solid Geometry
Authors: Utami S , Usodo B , Pramudya I 
Published: June 2019

Abstract
Creativity is an important aspect to face the global challenges. Creative thinking skill is a skill that is needed in this era to face problems in all aspects of modern life. Creative thinking is a thinking style which allows individuals to produce new products, find new solutions, and new ideas. The purpose of this study is to identify the level of students’ creative thinking in solid geometry. This research is a qualitative descriptive research. The subjects of this research were three students from 8th grade student of SMP N 8 Purwokerto Banyumas regency. The students were classified to high-ability, moderate-ability, and low-ability. The data were collected through creative thinking test and interview. There are three aspects of creative thinking: fluency, flexibility, and novelty. Based on the results, three subjects didn’t fulfill novelty, students who had low-ability had creative thinking level 0 (Not Creative), students who had moderate-ability had creative thinking level 1 (Almost Not Creative), and students who had high-ability had creative thinking level 2 (Quite Creative).
Preliminary Design of ILC-based Multimedia on Base of Number Concept
Authors: Witri G , Syahrilfuddin S , Guslinda G , Mahbubah K , Hermita N 
Published: June 2019

Abstract
Interactive Conceptual Learning (ILC) based Multimedia has been developed to represent base of number concept turn into more interactive and meaningful learning. The first design of ILC based multimedia is multimedia supported computer that explore base of number concept in existing conceptual. Pre-service elementary teachers should be provided with the learning that can optimize the base of number conceptions. To collect and analyse data comprehensively, researchers developed a 3D-1I developing method which has comprehensive stages: analysis, design, development, implementation and evaluation. The 3D-1I developing stage has been utilized to describe comprehensively ILC based Multimedia. It can be proved with the increasing average score from 30.10 on pretest to 82.33 on posttest of pre service teachers’ understanding on base number concept. Based on data analysis, it can be concluded that ILC-based multimedia could effectively improve pre-service teachers’ conceptual understanding on base of number concept.
Developing an Essay Test Instrument for Measuring Diagram Representation and the Capability of Argumentation on Newton’s Law
Authors: Syarif A N , Kuswanto H 
Published: June 2019

Abstract
The objective of this research was to develop an essay test instrument for measuring diagram representation and capability of argumentation of senior high school students. This research was conducted through three stages: (1) planning; (2) instrument experiment; and (3) manufacture. The instrument that would be administered was an essay test that consisted of 14 items for measuring diagram representation and capability of argumentation on the Newton’s law. This study implemented qualitative and quantitative validation analyses that have been provided by eight experts (lecturers, teachers, and peer reviewer) and an empirical validation using the Partial Credit Model (PCM) Item Response Theory (IRT) instrument with QUEST and PARSCALE application. The results of the quantitative validation were attained from Aiken’s V Index and showed this index of six items on the measurement of diagram representation is around 0.94-1.00. On the other hand, the results of the quantitative validation through Aiken’s V Index also showed that index of eight items on the measurement the capability of argumentation had is around 0.88-1.00. Then, the empirical validity test involved 250Grade XI students from SMAN 8 Bulukumba, South Celebes. Instrument analysis was conducted using PCM IRT on the basis of the QUEST application, and the results of this analysis showed that the INFIT Means-Square (INFIT MNSQ) was around 0.77 to 1.33 and the level of difficulty was around -0.824 to 0.797. The item reliability of each test item for the diagram representation and capability of argumentation was 0.79 and 0.85 respectively. In conclusion, the test instrument was in accordance with the students’ capability, ranging from -2.542 to 1.922, with a Standart Error Measurement SEM of 0.222, based on the PARSCALE outcome.
Physics Learning Using Direct Instruction Model Assisted by Plickers Application to Measure Problem Solving Ability
Authors: Naqiyah M , Jumadi  , Wilujeng I 
Published: June 2019

Abstract
This was a quantitative research that aims to know the effectiveness of physics learning by using direct instruction model assisted by Plickers application, knowing the problem solving ability of learners after being taught using direct instruction model assisted by Plickers application, and knowing the percentage of learners achievement for each problem solving indicators. The subjects of the study were the students of class XI MIA 1 SMA Negeri 1 Sayegan consisting of 32 students and selected using purposive method. Data was collected by using a test instrument in the form of a reasonable multiple choice which presented in the Plickers application. The results showed that learning by using direct instruction model assisted by application of Plickers was effectively used in physics learning process in terms of KKM (minimal completeness criteria) achievement. In addition, the average score of students’ problem solving ability was 85.00 with details of 27 students scored the high category and 5 students were in the medium category. Furthermore, the percentage of each problem solving indicator was in the high category and only one indicator experienced the medium category with a percentage of 73%.
Analysis of Items Using the Assessment Instrument Based on the Structure of Observed Learning Outcome
Authors: Nasrulloh A , Ashadi  , Yamtinah S 
Published: June 2019

Abstract
The purpose of this study was to analyze items that will be used in taxonomies based on the observed learning outcomes structure (SOLO) to categorize student responses so that items can be used in future studies. The research is descriptive research. Data were collected using a non-test method of a questionnaire consisting of 10 questions. Subjects in this study consisted of 3 lecturers and 5 teachers. The results showed that the items analyzed were grouped into SOLO taxonomy based assessment instruments with 14.2% unistructural, 29.6% multistructural, 29.6% relational and 29.6% abstracts expanded. The results also showed that the instrument the SOLO taxonomy-based assessment used included a very valid category with a score of more than 35. In conclusion, all of these items have met the category of SOLO-based taxonomy assessment instruments with very valid categories, so that it can further be used to measure students’ ability based on SOLO taxonomy on buffer.