bluuebunny/crossref_metadata_2025_split huggingface dataset:
Homogeneous study of Herbig Ae/Be stars from spectral energy distributions and Gaia EDR3
Authors: Guzmán-Díaz J. , Mendigutía I. , Montesinos B. , Oudmaijer R. D. , Vioque M. , Rodrigo C. , Solano E. , Meeus G. , Marcos-Arenal P. 
Published: April 2021

Context. Herbig Ae/Be stars (HAeBes) have so far been studied based on relatively small samples that are scattered throughout the sky. Their fundamental stellar and circumstellar parameters and statistical properties were derived with heterogeneous approaches before Gaia.
Aims. Our main goal is to contribute to the study of HAeBes from the largest sample of such sources to date, for which stellar and circumstellar properties have been determined homogeneously from the analysis of the spectral energy distributions (SEDs) and Gaia EDR3 parallaxes and photometry.
Methods. Multiwavelength photometry was compiled for 209 bona fide HAeBes for which Gaia EDR3 distances were estimated. Using the Virtual Observatory SED Analyser (VOSA), photospheric models were fit to the optical SEDs to derive stellar parameters, and the excesses at infrared (IR) and longer wavelengths were characterized to derive several circumstellar properties. A statistical analysis was carried out to show the potential use of such a large dataset.
Results. The stellar temperature, luminosity, radius, mass, and age were derived for each star based on optical photometry. In addition, their IR SEDs were classified according to two different schemes, and their mass accretion rates, disk masses, and the sizes of the inner dust holes were also estimated uniformly. The initial mass function fits the stellar mass distribution of the sample within 2 < M*∕M⊙ < 12. In this aspect, the sample is therefore representative of the HAeBe regime and can be used for statistical purposes when it is taken into account that the boundaries are not well probed. Our statistical study does not reveal any connection between the SED shape from the Meeus et al. (2001, A&A, 365, 476) classification and the presence of transitional disks, which are identified here based on the SEDs that show an IR excess starting at the K band or longer wavelengths. In contrast, only ~28% of the HAeBes have transitional disks, and the related dust disk holes are more frequent in HBes than in HAes (~34% vs. 15%). The relatively small inner disk holes and old stellar ages estimated for most transitional HAes indicate that photoevaporation cannot be the main mechanism driving disk dissipation in these sources. In contrast, the inner disk holes and ages of most transitional HBes are consistent with the photoevaporation scenario, although these results alone do not unambiguously discard other disk dissipation mechanisms.
Conclusions. The complete dataset is available online through a Virtual Observatory-compliant archive, representing the most recent reference for statistical studies on the HAeBe regime. VOSA is a complementary tool for the future characterization of newly identified HAeBes.
Dark Energy, Dark Matter and baryogenesis from a model of a complex axion field
Authors: Brandenberger Robert , Fröhlich Jürg 
Published: April 2021

Abstract
We introduce and study a model designed to simultaneously shed light on the mysteries connected with Baryogenesis, Dark Matter and Dark Energy. The model describes a self-interacting complex axion field whose imaginary part, a pseudo-scalar axion, couples to the instanton density of gauge fields including the hypercharge field. This coupling may give rise to baryogenesis in the early universe. After tracing out the gauge and matter degrees of freedom, a non-trivial effective potential for the angular component of the axion field is obtained. It is proposed that oscillations of this component around a minimum of its effective potential can be interpreted as Dark Matter. The absolute value of the axion field rolls slowly towards 0. At late times, it can give rise to Dark Energy.
BP Neural Network for Temperature Prediction of Alpha Magnetic Spectrometer on Orbit
Authors: Yang Fei , Sun Qie , Cheng Lin 
Published: April 2021

Abstract
A BP neural network combined with the Adam optimization algorithm and the Mini-batches Learning algorithm was established for predicting the temperature of BOX-C on Alpha Magnetic Spectrometer (AMS) in this paper. After training, the Mean Squared Error (MSE) of the prediction results under the normal operating condition is 0.14 and this shows that the model can be used to predict the temperature of BOX-C with a satisfying accuracy. The model paves the ground for AMS thermal control on orbit.
Forging 21st century skills development through enhancement of K to 12 gas laws module: a step towards STEM Education
Authors: Barquilla Manuel B. , Cabili Martiniano T. 
Published: April 2021

Abstract
STEM Education though an old educational reform in US, Europe and other Asian countries is newly introduced to Philippine setting. Two notion confused educators whether the term is an approach or a track in the senior high school curriculum. The term STEM Education refers to the integration of Science, Technology, Engineering and Mathematics but the heart of it is simply to develop the students’ capability of 21st century skills needed of the time for a lifelong learning. This study aims to: (1) enhance students’ conceptual understanding and increase performance level through utilization of the enhanced module; to (2) develop students’ 21st Century skills, namely: collaboration, knowledge construction, self-regulation, real-world problem solving skills, use of ICT for learning and skilled communication; and to (3) proposed STEM education Lesson plan on topic Gas Laws. The researcher employed experts (in content and pedagogy) to evaluate and rate specific topic on Gas laws, from the original learning module of the Department of Education (DepEd) K to 12 curriculum materials, using the 21st Century Learning Design Rubrics (21CLD). Results yielded low ratings thereby providing basis for module enhancement. Enhancement and revision of the module were done based on the experts’ formative evaluation. After science and Technology High School, school year 2017-2018, who were paired according to pretest results and were regrouped into experimental and control group for quasi-experimental design interpretation. A suggested STEM education lesson plan was generated to further integrate their concepts in gas laws and its application to technology, engineering and mathematics. Findings indicated that students in the experimental group not only developed and improved their 21st century skills with the aid of the enhanced module but also significantly improved their conceptual understanding and performance level as compared to the control group. Generally, this study provides enough evidence that the enhanced module brought significant impact to students’ academic performance. Study recommends using the enhanced module in public schools to cater the needs of the 21srt century learners. Furthermore, it is suggested that STEM lesson plan as an approach be prepared after the specific lesson on Gas laws will be introduced for students to fully integrate Science, Technology, Engineering and Mathematics in the issues and its applications about the topic.
Grade 8 learner’s achievement and motivation level in geometry using kahoot! as a formative assessment
Authors: Baguio Fatima , Rama Fe Marie I. , Rico Janah Marie L. , Salazar Douglas A. 
Published: April 2021

Abstract
This paper dealt with the utilization of Kahoot! and its effects on the grade 8 learner’s motivation and achievement level in Geometry. The two pre-assigned sections were randomly selected as experimental and control group in Iligan City National High School. Kahoot was used as a formative assessment in the experimental group while in the control group, traditional method of assessment was used. Based on the data gathered, both methods of formative assessment were effective in increasing the achievement level of grade 8 learners. The experimental group had higher increase of mean score, meaning the group that was exposed to Kahoot! improved better in the Achievement Test than the controlled group. Learners’ from the experimental group were highly motivated in answering the quiz using Kahoot. The researchers strongly recommend the used of Kahoot! as a formative assessment in grade 8 learners’ because it was showed that there was an effect on its achievement and motivational level inside the classroom towards Geometry.
Enhancing Grade 11 students’ representation and connection in permutation and combination for their problem solving
Authors: Chotikarn Nittaya , Kanhapong Aukkarawut , Tupsai Jiraporn , Yuenyong Chokchai 
Published: April 2021

Abstract
The purpose of this paper was to enhance Grade 11 Thai students? concept of “Permutation and Combination.” The participants included 35 Grade 11 students in Khon Kaen University Demonstration Secondary School (Suksasart), Khon Kaen, Thailand in the academic year of 2018. The students were studying with adoption of Lesson Study Innovative mathematical learning activities to acquire knowledge of permutation and combination by using Open Approach. The methodology used in this study was in the interpretive paradigm. The students? concept about permutation and combination was interpreted through students? tasks and class observation. The interpretation considered on how and what teachers? understanding on students? learning on permutation and combination. The findings revealed that students held several ideas for their solving problem development in the lessons of permutation and combination. The study discussed and identified key students? solving-problem learning, which further highlighted the implications to enhance students? learning on mathematics performance based on lesson study and open approach in Thailand.
Examining Grade 5 students’ capability of analytical thinking in learning about heat conduction through Predict – Observe – Explain (POE) strategy
Authors: Yuenyong Jirakan , Yuenyong Chokchai 
Published: April 2021

Abstract
The paper aimed to examine Grade 5 students’ capability of analytical thinking in learning about heat conduction of the Materials Unit through Predict – Observe – Explain (POE) strategy. Participants included 40 Grade 5 students in Khon Kaen University Demonstration Primary School (Modindaeng). Methodology regarded classroom action research. The POE heat conduction teaching was provided in the Material unit for 6 periods. Tools for interpretation included participant observation, students’ tasks, and informal interview. The findings revealed that students’ reasons provided some aspects of analytical thinking but the majority of students could not show all three aspects of analytical thinking – analytics for important issues, relation, and rational. The majority of students could mention about analytical thinking in dimension of rational but they could not clarify theories related to rational.
Student’s scientific reasoning on advertising as literature
Authors: Thanakulkit T , Tupsai J , Yuenyong C 
Published: April 2021

Abstract
The objective of this study was to investigate students in Grade 9 on scientific reasoning skills by combining basic learning about advertising. The s amples were 30 students in Grade 9 at Khon Kaen Demonstration Secondary School, Khon Kaen Province. In this study, interpretative paradigm was used to analyze teaching and learning activities aiming at enhancing students’ scientific reasoning skills through advertising as literature. Data were collected from class observation and assignment that reflect students’ scientific reasoning process based on the Four-Phased Approach of Reasoning proposed by Wu [1] that consists of 4 phases: (1) Issues identification as to identify key issues, (2) Clarification as to clarify personal views or attitudes toward issues, (3) Discussion and Defense as to logically present viewpoints and discuss them, and (4) Synthesis and Conclusion. Students were challenged to express their arguments regarding adverting they have exposed to and seek appropriate solutions to the problems. Students’ scientific reasoning process to analyse advertising as knowledge literacy also reflects their problem-solving skills. The results showed that students could express their opinions in logical thinking process by starting from 1) identifying issues, 2) clarifying viewpoints on adverting, 3) discussing and defensing, and 4) synthesizing and concluding. Therefore, using advertising as literature to induce students can significantly develop their scientific reasoning skills . This study also presents practical implications to enhance students’ scientific reasoning through learning activities of literary advertising.
Development of a STEM board game on waves for grade 7 students
Authors: Malicoban Elesar V , Eguia April Mae S , Salasayo Zairah A , Monte Aireen Babe L , Mordeno Ivy Claire V 
Published: April 2021

Abstract
This study was conducted to develop a STEM board game on waves for Grade 7 students. The board game underwent the following stages of development: preparatory stage, game development, and expert’s assessment and validation. The study employed quantitative and qualitative research designs. After conducting two sets of pilot testing, data revealed that the categories to assess the board game were all rated excellent. Though there were suggestions for improvement, the developed board game was interesting and considered as a useful tool in demonstrating the concepts of waves and promoting STEM learning.
Developing the lesson plan of the manufacturing fish drying STEM Education
Authors: Koes-H Supriyono , Indika  , Nizami  , Yuenyong Chokchai , Sutaphan Sukanya , Somprach Kanokorn , Sranamkam Tawee 
Published: April 2021

Abstract
The paper will clarify STEM education learning activity of the designing of the manufacturing fish drying. The STEM education learning activity was developed based on Sutaphan and Yuenyong [17] the context-based STEM education learning approach. The activity will start from context of Indonesian favourite dry fish. Then, the issue of manufacturing the drying fish will be raised in order to motivate students to practice knowledge for designing the fish dryers and process of fish drying. Through their designing, the lesson plan will provide students chance to practice integration of knowledge. These knowledge include nutrients in dry fish, fish species, measuring sizes of fish, energy sources, chemistry in preparing fish for drying, capitals analysis, marketing functions (e.g. buying and selling, pricing, grading, weighing, storage, transportation, financing and market information). And, students could learn to practice not only STEM knowledge and skills but also entrepreneurship education. This paper may have implications for designing STEM education learning activities.
STEM Learning Activity through Tempeh Making Process
Authors: Adita Arum , Yuenyong Chokchai 
Published: April 2021

AbstractThe paper will clarify the STEM learning activity by tempeh making process, which provides through Sutaphan and Yuenyong context-based STEM education learning approach. This approach consists of 7 stages including (1) Identification of social issues, (2) Identification of potential solution, (3) Need for knowledge, (4) Decision-making, (5) Development of prototype or product, (6) Test and evaluation of the solution, and (7) Socialization and completion decision stage. The Learning Activity will bring students to practice integrated knowledge among chemistry, mathematics, biology, and economics to design their products. The activity may have implications for developing STEM learning activity in schools.
STEM-Oriented activities for improving student performance in Chu Van An secondary school, Thai Nguyen province, Vietnam
Authors: Nguyen Thanh-Tung , Hoang Dieu-Linh , Nguyen Hoang-Thuy Linh , Nguyen Thanh-Binh 
Published: April 2021

Abstract
In this study, we investigated the STEM-oriented activities have been applied in Chu Van An secondary school, Thai Nguyen province, Vietnam which aimed to improve the student’s performance. By conducting the appropriate approaches, student can improve their self-awareness, scientific thinking and actively participate in learning activities. Several students have awarded high prizes at city and provincial science and technology competitions. This study aims to show a STEM-oriented implementation model at secondary school which might apply in different contexts.
Design and manufacture a number of generator models to organize STEM activities and general physics lessons
Authors: Bao Thai Quoc , Khoa Cao Tien , Thu Ha Nguyen Thi , Quang Phan Dinh , Ngoc Ngo Tuan , Hoan Vo Quang 
Published: April 2021

Abstract
In this work, we study and manufacture a number of mini generator models: “thermoelectric machines, hydropower plants and wind power generators” from easy-to-use, environmentally friendly materials. For each model, we provide structure diagrams, operational principles and propose orientations to use generator models in the organization of experience activities, in project teaching, as well as in STEM teaching. in high school.
An investigation of pre-service teachers’ teaching active learning to be STEM Education
Authors: Dearamae R , Safkolam R , Yacob M 
Published: April 2021

Abstract
Teaching and learning in science class of Thailand focused on the teaching integrated approaches to STEM education. To enhance students to participate in doing an activity and learning in class in order to provide the students to more understand about the scientific contents. Therefore, the aim of this study was to investigate pre-service teachers’ teaching active learning to be STEM education. In this studied, there were two pre-service teachers to be case studies, PST-A and PST-B. The data were collected by investigation lesson plans, classroom observation and interview. Then, the data were analyzed by grouping word by using the criteria of characteristics of active learning from Bonwell & Eison [3] and interpretation. The results found that PST-A and PST-B teaching corresponding to characteristics of active learning. The teaching activities of all of them were the feature of teaching activity in STEM education were; 1) students were development skills and engaged in doing activities such as practicing, observing, discussion, collaboration and calculation, this teaching and learning prompted students learn science by using science and mathematics in STEM, 2) students’ learning was using simulation and video teaching about solar cell, this teaching and learning prompted students learn science by using technology in STEM, and 3) students are involved with higher order thinking and their attitudes such as analysis, design and creating, this teaching and learning prompted students learn science by using engineering in STEM. From the results shown that when pre-service teachers teach students with active learning in class could prompt students’ learning to be STEM education.
Pre-service mathematics teachers’ perspectives on STEM-based learning activities
Authors: Poonpaiboonpipat Wanintorn 
Published: April 2021

Abstract
As STEM education is the learning approach which involves integration from various subjects, ambiguity and differences in the interpretation of the process among the users from different subjective backgrounds can occur, particularly the pre-service teachers who have less experience in teaching. They shall implement this teaching approach with confident in teaching mathematics which is one of the subjects in STEM education, this research has focused on mathematics teachers’ perspectives toward the STEM learning activities. The participants were 36 pre-service mathematics teachers in the academic year 2017. The research instrument used for collecting data was teacher reflective journals and lesson plans. The data was analyzed by content analysis, coding, generating themes and finding the associate frequency of pre-service mathematics teachers in each theme. The finding showed that most pre-service mathematics teachers learnt the concept of STEM education and could design learning activities based on STEM education. The difficulties in learning activities design were to create the integrated situations and to set the conditions related to engineering design processes. They wanted to revise their lesson plans to be more stressed in mathematical concepts and they still wondered if STEM education was suitable and applicable to every mathematical content.
Analyzed and Causal Factor the 21st Century Leadership 4.0 of Science Educational for Sustainable
Authors: Jedaman Pornchai , Kenaphoom Sunya , Jongmuanwai Benjapuk , Niyomves Busara 
Published: April 2021

Abstract
Science educational were the key indicators of a capacity. Leadership 4.0 is a process that influences changes in the attitudes and assumptions of the personnel in the organization, creating a bond for change, have to an important objectives and strategies. This article aims to presented about to analyzed and causal factor 21st century leadership 4.0 of science educational for sustainable. Competencies to the 21st century leadership 4.0 of science for sustainable including leadership spirit and vision, morals and ethics, pursuing service, leader competency and evaluation. Skills to 21st century of science for sustainable of reading, writing, arithmetic, relation technology and innovation, relation qualitative, critical thinking, creativity, creative tension, critical proactively, communication, collaboration, collaborative cultural, competency, connecting, composition, controlling, cost effectiveness, empowerment, efficiency and effective, evaluation. Causal factor of the competencies and skills the 21st century are to affective of science educational for sustainable to direct influence was statistically significant at a level of .05 level. Also, the roles of leaders into science educational for sustainable as being a leader of setting direction and encouraging leadership, a planner and management, change and coordination, communicator and resolving conflicts.
Formulation of Seasoned Sauce Product for Betong Instant Noodle
Authors: Muninnopamas Wipada , kanpairo Kamontip , Srisuk Suteera , Muninnopamas Jeerawoot , Hayeesamoh Abdulnaser 
Published: April 2021

Abstract
The purpose of this study was to develop the seasoned sauce for instant Betong noodle. The developed seasoned sauce formula consisted of garlic, sugar, black soy sauce, soy sauce and vegetable oil in quantity of 24.5%, 14%, 1.5%, 24% and 36% respectively. The ratio study of seasoned sauce product per rehydrated Betong noodle 117 grams indicated that 50 grams of seasoned sauce per rehydrated Betong noodle 117 grams was the most favorite. The physical characteristics of seasoned sauce product for Betong instant noodle were the color of L*, a* and b* with value of 17.02, 11.29 and 23.04 respectively and the Water Activity (aw) with value of 0.60. The chemical characteristics were 5.09 pH and the quantity of salt, sugar, moisture, protein, fat, ash and fiber were 2.85%, 1.04%, 8.24%, 0.74%, 37.55%, 6.83% and 0.91% respectively. Meanwhile, the result from consumers’ acceptance survey revealed that 31.3% of consumers rated “Liked very much” with average score of 7.31±1.44.