bluuebunny/crossref_metadata_2025 huggingface dataset:
Absorption of atomic and molecular species in carbon cellular structures (Review article)
Authors: Krainyukova N. V. , Kuchta B. , Firlej L. , Pfeifer P.
Published: March 2020

The paper presents a brief review of the recent developments in the field of absorption of atomic and molecular species in carbon cellular structures. Such absorbing objects can be distinctly recognized among a large family of carbon porous materials owing to potential and already observed in experiments very high capacity to soak and to keep inside different substances, which at usual conditions outside the porous matrices may often stay only in a gaseous form. High capacity filling is attained owing to single graphene-like walls separating different cells in the whole structures providing their lightweight. This property of cellular structures makes them very promising for numerous technological applications such as hydrogen storage in fuel cells and molecular sieving in membranes made from such structures or for their usage in microelectronics, photovoltaics and production of Li-ion batteries. Independently of the targeted applications gases are good candidates for probing tests of carbon matrices themselves.
Low dimensional features of graphene nanostructure stability and vibrational characteristics (Review)
Authors: Gospodarev I. A. , Sirenko V. A. , Syrkin E. S. , Feodosyev S. B. , Minakova K. A.
Published: March 2020

The densities of phonon states and their related vibrational thermodynamic characteristics, such as heat capacity, root-mean-square displacement of atoms, and thermal expansion, are calculated and analyzed at the microscopic level for graphite and graphene nanoformations, such as nanofilms and nanotubes. The simulation model is based on experimental data without a priori assumptions as to the nature and potentials of interatomic interactions, and is compared to them only after, which yields a good agreement. The quasi-flexural and torsional modes, which are inherent to graphene nanotubes, are considered and their contribution to the low temperature vibrational characteristics are analyzed. The impact that extended defects, such as graphite intercalation with transition metals, step-edges on graphene nanofilms, and edges of a graphene single layer on a substrate, have on the phonon spectrum and vibrational characteristics is analyzed. The calculated results are compared to the experimental data.
Host species of mistletoes (Loranthaceae and Viscaceae) in Australia
Authors: Clark Nicole F. , McComb Jen A. , Taylor-Robinson Andrew W.
Published: March 2020

In order to study the relationships between mistletoes and their host species, comprehensive collections of both mistletoes and hosts are needed. The effect of sampling effort on the estimation of mistletoe host range was demonstrated in a comparison of an inventory of host mistletoe interactions published by Downey in 1998 and a 2019 inventory presented here, which is based on data from collections in the Australian Virtual Herbarium and information in the literature. New hosts were recorded for 93% of the 90 Australian mistletoes. There were 338 previously known hosts recorded to be parasitised by additional mistletoe species, and 317 new host species that were not previously known as mistletoe hosts (25 being alien species). These were from 78 new host genera and 13 new host families. The total number of host species was 1186 within 327 genera from 92 host families. A total of 63% of all Australian mistletoes parasitise species of either Eucalyptus or Acacia or both these genera. The large rise in host species recorded in less than two decades between inventories suggests that current knowledge of hosts is still incomplete, such that further new hosts will be discovered in future. Some mistletoe species show a strong preference to one host family or genus but due to insufficient collecting it is premature to conclude that any of the three species known from a single host are host specific.
Soluble epoxide hydrolase is an endogenous regulator of obesity-induced intestinal barrier dysfunction and bacterial translocation
Authors: Wang Yuxin , Yang Jun , Wang Weicang , Sanidad Katherine Z. , Cinelli Maris A. , Wan Debin , Hwang Sung Hee , Kim Daeyoung , Lee Kin Sing Stephen , Xiao Hang , Hammock Bruce D. , Zhang Guodong
Published: March 2020

Significance

Defective intestinal barrier function and enhanced lipopolysaccharide (LPS)/bacterial translocation is a key pathogenic factor in many human diseases, including obesity. To date, the molecular mechanisms leading to intestinal barrier defects are not well understood, and there are no available therapeutic approaches to target intestinal barrier function. Here we show that soluble epoxide hydrolase (sEH) could be a novel therapeutic target of obesity-induced intestinal barrier dysfunction and LPS/bacterial translocation, and that sEH inhibitors, which have been evaluated in human clinical trials targeting other disorders, could be promising agents for prevention or treatment.
Siberian-American cognitive and cultural interface through eco-ethnic lexicon
Authors: Gural Svetlana , Kim-Maloney Alexandra , Petrova Galina
Published: March 2020

The focus of this paper is a possible Siberian link with the Na-Dene Languages, based on cognitive lexical
semantics. Dene-Yeniseian is a proposed language family consisting of the Yeniseian languages of Central Siberia and the Na-Dene
languages of North-Western North America (Campbell 2011; Trombetti 1923; Vajda 2010, 2011, 2018). The paper connects semantic universals, Ket and
Dene folklore, and also comparative historical linguistic research. In analyzing a group of cognates, the paper’s aim is to
discuss the cultural, cognitive and pragmatic reasons that enabled these cognates to survive for several thousand years. Our main
point is that factors such as the relative importance of linguistic signs in a language community, lingual conservatism of
semantic universals and the distinctiveness of its referents, probable frequency with which these words were used, and their
cultural symbolism in relatively similar environments significantly contributed to their survival in ethnic groups belonging to
the proposed language family. Our cross-disciplinary study helps us identify the essential place of eco-ethnic material in
interpreting cross-continental similarities and emphasizes the integrative role of culture. It will be argued that the eco-ethnic
lexicon reflected by the Dene-Yeniseian cognates reveals several thousand years of diachronic cognitive processes.
What is an indirect speech act?
Authors: Meibauer Jörg
Published: March 2020

The notion of an indirect speech act is at the very heart of cognitive pragmatics, yet, after nearly 50 years of orthodox (Searlean) speech act theory, it remains largely unclear how this notion can be explicated in a proper way. In recent years, two debates about indirect speech acts have stood out. First, a debate about the Searlean idea that indirect speech acts constitute a simultaneous realization of a secondary and a primary act. Second, a debate about the reasons for the use of indirect speech acts, in particular about whether this reason is to be seen in strategic advantages and/or observation of politeness demands. In these debates, the original pragmatic conception of sentence types as indicators of illocutionary force seems to have been getting lost. Here, I go back to the seemingly outdated “literal force hypothesis” (seeLevinson 1983: 263–264) and point out how it is still relevant for cognitive pragmatics.
Indirect reporting and pragmatically enriched context
Authors: Obdalova Olga A. , Minakova Ludmila Yu. , Soboleva Aleksandra V.
Published: March 2020

This article examines the pragmatic comprehensibility of indirect reporting. The research problem is to determine how Russian EFL learners (linguists and non-linguists) are able to turn original utterances expressing the intentions of native speakers of American English in direct speech into indirect reports to a third party. Two major issues are analyzed: adequacy of semantic content and preservation of pragmatic enrichment. The study was carried out employing the framework of Kecskes’Socio-Cognitive Approach(2008, 2010, 2014, 2017). Twelve stimulus-utterances belonging to three communicative types (statements, questions, commands/requests) were video-recorded. Qualitative and quantitative analyses revealed that the participants met with some difficulties preserving the speaker’s intention while interpreting attached pragmatic enrichment and perlocutionary effect. Both cohorts of Russian EFL learners were able to preserve the semantic content relatively efficiently, but encountered substantial difficulties inferring a complex pragmatic content.
Genetic manipulation of LKB1 elicits lethal metastatic prostate cancer
Authors: Hermanova Ivana , Zúñiga-García Patricia , Caro-Maldonado Alfredo , Fernandez-Ruiz Sonia , Salvador Fernando , Martín-Martín Natalia , Zabala-Letona Amaia , Nuñez-Olle Marc , Torrano Verónica , Camacho Laura , Lizcano Jose M. , Talamillo Ana , Carreira Suzanne , Gurel Bora , Cortazar Ana R. , Guiu Marc , López Jose I. , Martinez-Romero Anabel , Astobiza Ianire , Valcarcel-Jimenez Lorea , Lorente Mar , Arruabarrena-Aristorena Amaia , Velasco Guillermo , Gomez-Muñoz Antonio , Suárez-Cabrera Cristian , Lodewijk Iris , Flores Juana M. , Sutherland James D. , Barrio Rosa , de Bono Johann S. , Paramio Jesús M. , Trka Jan , Graupera Mariona , Gomis Roger R. , Carracedo Arkaitz
Published: March 2020

Gene dosage is a key defining factor to understand cancer pathogenesis and progression, which requires the development of experimental models that aid better deconstruction of the disease. Here, we model an aggressive form of prostate cancer and show the unconventional association of LKB1 dosage to prostate tumorigenesis. Whereas loss of Lkb1 alone in the murine prostate epithelium was inconsequential for tumorigenesis, its combination with an oncogenic insult, illustrated by Pten heterozygosity, elicited lethal metastatic prostate cancer. Despite the low frequency of LKB1 deletion in patients, this event was significantly enriched in lung metastasis. Modeling the role of LKB1 in cellular systems revealed that the residual activity retained in a reported kinase-dead form, LKB1K78I, was sufficient to hamper tumor aggressiveness and metastatic dissemination. Our data suggest that prostate cells can function normally with low activity of LKB1, whereas its complete absence influences prostate cancer pathogenesis and dissemination.
Feasible assessment of recovery and cardiovascular health: accuracy of nocturnal HR and HRV assessed via ring PPG in comparison to medical grade ECG
Authors: Kinnunen Hannu , Rantanen Aleksi , Kenttä Tuomas , Koskimäki Heli
Published: March 2020

Objective: To validate the accuracy of the Oura ring in the quantification of resting heart rate (HR) and heart rate variability (HRV). Background: Wearable devices have become comfortable, lightweight, and technologically advanced for assessing health behavior. As an example, the novel Oura ring integrates daily physical activity and nocturnal cardiovascular measurements. Ring users can follow their autonomic nervous system responses to their daily behavior based on nightly changes in HR and HRV, and adjust their behavior accordingly after self-reflection. As wearable photoplethysmogram (PPG) can be disrupted by several confounding influences, it is crucial to demonstrate the accuracy of ring measurements. Approach: Nocturnal HR and HRV were assessed in 49 adults with simultaneous measurements from the Oura ring and the gold standard ECG measurement. Female and male participants with a wide age range (15–72 years) and physical activity status were included. Regression analysis between ECG and the ring outcomes was performed. Main results: Very high agreement between the ring and ECG was observed for nightly average HR and HRV (r2 = 0.996 and 0.980, respectively) with a mean bias of −0.63 bpm and −1.2 ms. High agreement was also observed across 5 min segments within individual nights in (r2 = 0.869 ± 0.098 and 0.765 ± 0.178 in HR and HRV, respectively). Significance: Present findings indicate high validity of the Oura ring in the assessment of nocturnal HR and HRV in healthy adults. The results show the utility of this miniaturised device as a lifestyle management tool in long-term settings. High quality PPG signal results prompt future studies utilizing ring PPG towards clinically relevant health outcomes.
The Effectiveness of Al-Qurun Teaching Model (ATM) Viewed from Gender Differences: The Impact on Mathematical Problem-Solving Ability
Authors: Huda Syamsul , Suherman  , Komarudin  , Syazali Muhamad , Umam Rofiqul
Published: March 2020

This research aimed to see the ability to solve mathematical problems between genders by applying the Al-Qurun Teaching Model. The researchers report the results of the research on the effectiveness of Al-Qurun Teaching Model on mathematical problem-solving ability viewed from gender differences. The research method used is 2 x 2 factorial design of quasi-experimental with random sampling technique. Data collection techniques used were the test method to see the results of students’ mathematical problem-solving ability. The normality test employed was Liliefors test and the homogeneity test used was the similarity of two variances. Hypothesis testing used was two-way ANAVA. The results of the study are: (1) There are differences between the Al-Qurun Teaching Model and the conventional teaching model on mathematical problem-solving ability and the use of Al-Qurun Teaching Model is more effective than the conventional teaching model, (2) There are differences in the results of mathematical problem-solving ability between female and male students and the results of mathematical problem-solving ability of female students are higher than the male students, (3) There is no interaction between learning and gender on mathematical problem-solving ability.
IMPROVE Learning Model and Learning Independence: Influence and Interaction on Mathematics Problem-Solving Abilities in Islamic Boarding School
Authors: Yasin Muhamad , Huda Syamsul , Putra Fredi Ganda , Syazali Muhammad , Umam Rofiqul , Widyawati Santi
Published: March 2020

Problem-solving ability is a basic ability in the process of learning mathematics. The purpose of this study is to determine whether there is an effect of the IMPROVE learning model on mathematics problem-solving abilities, the effect of students’ learning independence on mathematics problem-solving abilities, and the interaction between learning model and learning independence in term of mathematics problem-solving abilities. The research method used was quasi-experimental with post-test-only control group design. The data analysis technique used was the analysis of the variance of two unequal cells. The results showed that there were differences in mathematics problem-solving abilities between students who had high, medium, and low learning independence. The values of the results of the comparison are FAobserved = 3.271 and FAcritical = 3.170, FBobserved = 6.945 and FBcritical = 4.020, FIobserved = 0.554 and FI critical = 3.170 at a significance level of 5%. Based on the norm, where Fobserved > Fcritical, H0 is rejected. So, it can be concluded that there is an influence between the IMPROVE learning model and mathematics problem-solving abilities, there is an influence between learning independence and mathematics problem-solving abilities, and there is no interaction between the IMPROVE learning model and the learning independence on mathematics problem-solving abilities.
Effectiveness of Physics Learning Media Course assisted by Instagram on Student’s Creative Thinking Skill
Authors: Irwandani  , Rinaldi Achi , Pricilia Agitha , Sari Putri Mardiana , Anugrah Adyt
Published: March 2020

This study aims to determine the effectiveness of Physics Learning Media course assisted by Instagram and to know its impact on students’ creative thinking skills. This study was conducted on students who took Physics Learning Media course. This research is a quasi-experimental with randomized pretest-posttest control group design. Independent sample t-test showed that the implementation of physics learning media course assisted by social media Instagram influenced students’ creative thinking skills. The ability to think creatively in students in the experimental class is higher than in students in the control class. These results indicate that Physics Learning Media course assisted by social media Instagram has an effective impact on students’ creative thinking skills.
Improving Students’ Mathematical Representation Ability Through Challenge-Based Learning with Android Applications
Authors: Susilawati W
Published: March 2020

The rapid advancement of the latest technology, the absence of interactive multimedia in schools, and the inferior ability of students’ mathematical representation creating an alternative breakthrough in developing Android-based learning applications. The purpose of the research was to improve the ability of students’ mathematical representation through Android Challenge-based Learning. The quasi-experimental, held at Bandung. It involved 79 students, 39 experimental classes and 40 control classes. The findings indicated that there an increased ability of mathematical representations of students with Android-based Challenge-based Learning than students in the control group. There was no difference in the performance of mathematical representation between students with Challenge-based Learning based on Android and conventional learning based on mathematical prior knowledge in the high, medium and low categories. There was interaction in the types of challenge-based learning between the student with Android applications and expository learning based on prior knowledge of mathematics in the high, medium, and low on the ability of students mathematical representation. Challenge-based learning based on Android facilitated the process of conflict, discovery, social interaction, and reflective processes of students so that the ability of mathematical representation is improved while the material easily understood and exciting.
Density of Mollusks Community from a Rocky Intertidal Zone in Karang Papak Coastal, West Java, Indonesia
Authors: Paujiah E , Cahyanto T , Sariningsih I , Setya W , Zulfahmi I
Published: March 2020

Mollusks are soft boned animals that are included in invertebrate phyla. The Karang Papak coastal is located in Cikelet, Garut Regency, West Java, Indonesia. The study was carried out in an intertidal zone in Karang Papak, West Java Indonesia at October 2018-February 2019 which the intertidal zone was divided into three observation stations using four times sampling based on the four moon phases (Quarter one, dark moon, quarter two, full moon). The objectives of this research were to study abundance and density of mollusks based on moon phase. The results showed that Seventy-one mollusk species were found to be represented, corresponding to 36 genera, 23 families, 11 orders from class of Gastropoda and Bivalvia. The density values ranging from 3.22-4.17 ind/m2. The highest value obtained in the dark moon phase was 4.17 ind/m2 while the lowest value was found in the moon phase Q-2 amounted to 3.22 ind/m2.The moon phase can affect the density of mollusks because the main contain light from the moon that can affect the regulation of the mollusks’ body such as for physiological processes. This data can be used as basic data on mollusks’ diversity and determine the time to catch mollusks.
The Conceptual Framework of Designing a Discovery Learning Modification Model to Empower Students’ Essential Thinking Skills
Authors: Chusni M M , Saputro S , Suranto  , Rahardjo S B
Published: March 2020

This article aims to describe the modification of the discovery learning model as a conceptual framework to be applied in science learning to empower students’ essential thinking skills. The method used is qualitative with the main data source of the literature review. This conceptual framework focuses on three aspects consisting of the discovery learning model, the TASC learning model, and the cognitive system in the Presseisen’s taxonomy. From the results of the conceptual framework of the discovery learning model modification with the TASC learning model, it is obtained the syntax of the learning model starting from the start with multi-modal representation problems, generating hypotheses, investigation, interpretation and inference, discussion and conclusion, and application. Then the new model is given the term discovery-based multi-modal representation (DIMEnsi). The implications of this research can empower students’ essential thinking skills, which include analytical, critical, creative thinking, decision making, and problem-solving skills.
The Use of Moodle-based Learning Management System (LMS) on MATE (Media Ajar Teori Evolusi)
Authors: Syara Y , Anggoro BS , Handoko A , Haka N B , Kesumawardani A D , Hidayah N
Published: March 2020

The goal of this research is to identify students’ responses and see the feasibility of MATE (Media Ajar Teori Evolusi). This research is Research and Development. The subjects of the research were students of the sixth semester of Biology Education Department in the academic year of 2019. The ADDIE model (analysis, design, development, implements, and evaluation) was used as the design of the research. The developed product is declared as feasible because of its efficiency, light-weight, and compatibility. The students can construct their ideas. The developed product facilitates knowledge construction through the interactive online instrument. This is the first developed Moodle-based learning management system (LMS) on MATE (Media Ajar Teori Evolusi). It can help the lecturers to be more structured in teaching to achieve the goals of learning. Based on the validation conduction by experts, the overall result is 85,5% and students response in the trial to get an 88% percent-rate average. Judging from the overall result, the learning media is declared as feasible and appropriate to be used.
Physics Animation Videos Learning Media Integrated with Quranic Verses with YouTube Output
Authors: Anggraini W , Utami G N , Dewi N A K , Rohmani  , Musarofah S
Published: March 2020

This study aims to find out the opinions of the validators and the responses of students on the learning media in the form of animated videos integrated with Quranic verses with YouTube output. This research is a research and development (R & D) research using Borg and Gall procedure. This research was conducted at Senior High School YP UNILA Bandar Lampung, Senior High School 1 Bukit Kemuning, and Senior High School 7 Bandar Lampung with the eleventh-grade students as the object of the research. Validation results from material experts, media experts, and religious experts showed very good results with percentage reaching 84.67%. Then, the animated video was tested through two stages, namely small-group trial and field trial. The average results obtained were 78.10% for small-group trial and 81.30% for a field trial at Senior High School YP UNILA Bandar Lampung, Senior High School 1 Bukit Kemuning, and Senior High School 7 Bandar Lampung. Thus, the learning media in the form of animated videos containing Quranic verses with YouTube output, from the three schools, has the feasible criteria.
Teaching Material Topology: Development in Metacognitive Ability
Authors: Andari Tri , Lusiana Restu , Suherman
Published: March 2020

Technology integration in the learning process is needed in the technological era as a form of development of teaching materials that can improve students’ metacognitive abilities. This study aims to develop valid, practical, and effective topology teaching materials based on students’ metacognitive abilities. Research and development follow the steps of developing a 4-D model that includes Define, Design, Develop, and Disseminate. The results showed that topology teaching materials met the validity criteria of 82.50%. Practicality is 82.92% in the small scale test and field test with practicality is 85.02%. Then teaching materials meet the effectiveness with limited trials of 83.33% and field tests of 87.5%. Based on these results, topology teaching materials can be used as learning resources in measuring metacognitive abilities.
Exploring the Prospective of Pre-Service Physics Teacher’s Pedagogical Content Knowledge: A Case Study
Authors: Nurulsari Novinta , Abdurrahman  , Maulina Hervin , Sukamto Ismu , Umam Rofiqul
Published: March 2020

Indonesia global assessment in 2017 and preliminary survey results illustrated the achievements of teachers’ cognitive abilities that were still low in terms of professional knowledge and pedagogic. This study were aimed to describe the existing conditions of the pedagogical content knowledge of physics teachers at the undergraduate level and predict future prospects about what pedagogical content knowledge the pre-service physics teacher (PPTs) will have by considering the futuristic aspects. This study used case-study qualitative research within a group of 52 mostly passive pre-service physics teachers during the fourth semester of their four-year graduate program. It focuses on the central issue of essential topics in school physics learning. The results of the document analysis indicated that they have not been able to design a learning scenario for each Physics essential material with reference to the development of science and technology. Then, they have not showed a good subject matter mastery for each Physics topic. This paper ultimately also explore a hypothetical model of learning strategies that has the potential to develop PPTs’ PCK through School Physics learning in college. This strategy is based on the future needs that must be mastered by students from an early age.
The Correlation between Logic Ability, Mathematical Proof and The Holy Qur’an Recitations
Authors: Sugilar H , Dedih U , Anwar C , Priatna T , Lestari A , Darmalaksana W
Published: March 2020

The purpose of this study is to measure the ability of logic and mathematical proof of students through logic problems, proof. To measure the ability of logic in addition to the logic test also by testing the ability to memorize the Holy Qur’an (tahfidz). This research method is a quantitative method measuring the ability of logic and mathematical proof of mathematics education study program students. The subjects of this study were 47 students of mathematics education at one of the tertiary institutions in Bandung who were finishing their thesis and memorizing the Holy Qur’an juz 30. The instruments used consisted of logic questions, proof questions, tahsin and tahfidz assessment forms, and questionnaires. The results showed that the mathematical proof ability was in the low category while the logic ability was in the sufficient category. Ability of tahsin and or tahfidz in either category. Students respond to both tahsin and tahfidz activities and do not object to the obligation to memorize the Holy Qur’an juz 30. The low ability of proof is caused by students not practicing proving questions, difficulty in completing because of the low understanding of theorems and forms of proof. There is a correlation between logical ability and mathematical proof, correlation between logical ability, mathematical proof with memorization of the Holy Qur’an. Mathematical proof ability can be trained by doing a lot of work or practicing proving questions, whereas logic ability can be trained by increasing brain activity for example memorizing.
Evaluation of the Success of Programs and Strategy for Sustainable Coastal Community Development in Tanggamus Regency
Authors: Yanfika H , Rangga K K , Viantimala B , Listiana I , Mutolib A , Rahmat A
Published: March 2020

This study aims to analyze the success of the KUB program and the coastal community development strategy in Tanggamus Regency. The research was conducted in Kota Agung Sub-district, Tanggamus Regency, Lampung Province, which is a fishery center in Tanggamus Regency. The study was conducted in July and August 2019. The research method uses a quantitative approach to the survey method. Qualitative data was collected to support research studies through in-depth interviews, focus group discussions (FGD), and field observations. The data collected will be analyzed using qualitative descriptive approaches. The results showed that the capture fisheries program was generally good and following the needs of fishermen to increase catches. Nevertheless, in the implementation of activities in the joint business groups still need to be improved access, because program assistance is still felt by some individuals. Besides, increased communication between group members strengthens joint business groups is needed. The strategy of developing coastal communities in increase independence is through training in processing fishery products, fostering entrepreneurship, policies to limiting fishery products from outside the region, increasing public awareness about of maintaining the cleanliness of the sea and the environment and promote cooperation with stakeholders to support the sustainability of fisheries businesses.
Improving Higher Order Thinking Skills (HOTS) with Project Based Learning (PjBL) Model Assisted by Geogebra
Authors: Suherman  , Prananda M R , Proboningrum D I , Pratama E R , Laksono P , Amiruddin
Published: March 2020

The 21st century requires learning that provides a project-based and constructive experience so that higher order thinking skills can be increased. The objective of this study was to improve HOTS with Project Based Learning (PjBL) model assisted by Geogebra. Quasi-Experimental was used as the method, with simple random sampling as the sampling technique. Data collecting techniques used were the test method to see the improvement of HOTS. The hypothetical test used was one-way ANOVA with a significant level of 5% and N-gain was used to determine the improvement of HOTS. The results show that there is an influence from the Geogebra-assisted Project Based Learning model on higher order thinking skills. In addition, the average score of the class taught by using the Geogebra-assisted Project Based Learning (PjBL) model was higher than the non-Project-Based Learning (PjBL) class with an increase of 0.643 in the medium category. It means that learning can achieve the desired goals, the teacher must plan learning well, and the PjBL model can be made as a learning solution in the 21st century.
The Practicality and Effectiveness of Multiple Representations Based Teaching Material to Improve Student’s Self-Efficacy and Ability of Physics Problem Solving
Authors: Citra C , Distrik I Wayan , Herlina Kartini
Published: March 2020

The objective of this research was to find out the practicality and effectiveness of multiple representation based teaching material to improve student’s self-efficacy and ability of physics problem solving in static electricity material. This was a quasi-experiment research by using pretest-posttest control group design. Samples were taken by using purposive sampling. Samples were grade XII students in Public Senior High School 15 (SMAN 15) in Bandar Lampung, YP UNILA Senior High School in Bandar Lampung, and Public Senior High School 2 (SMAN 2) in Kalianda. Instruments used were observation sheets for teaching material implementation, students’ response to teaching material, student’s activity sheet, self-efficacy sheet, and problems for student’s problem solving ability test. Data were analyzed by using descriptive analysis with percentage, N-gain analysis, and independent t-test. The research results showed that multiple representations based teaching material were: 1) practical to use in learning, and it was shown by (a) the average implementation of teaching materials in each learning activity, and (b) positive student’s response in using teaching materials; 2) effective, and it was shown by (a) active category for student’s activity during learning, and (b) significant differences of self-efficacy and problem solving ability.
The Impact of Group Investigation (GI) Learning Models on Sequence and Series: A Study Case Numerical Skills Analysis in Islamic Boarding School
Authors: Tsani I , Huda S , Yasin M , Syazali M , Sari W R , Jermsittiparsert K
Published: March 2020

The numerical ability of students needs to be mastered because it relates to speed and accuracy in using basic functions in calculating basic mathematical operations. This study aims to determine the impact of the Group Investigation (GI) learning model on numerical ability. The research method used is Quasi Experimental using a quantitative approach. The instrument used in the form of essay test questions. The data used are the results of the post-test analysed with T test. Based on the data obtained Tcount= 5,849 and Ttable= 2,005 because Tcount≥ Ttableit means that the numerical ability of students taught with GI learning model is better than the numerical ability of students who were given conventional learning model so it can be concluded that, Group Investigation (GI) learning model has a good impact on students’ numerical ability.
Development of Smart Physics Card as Physics Learning Media on Temperature and Heat Material
Authors: Latifah Sri , Koderi K , Fiteriani Ida , Khoiruddin  , Diani Rahma
Published: March 2020

This study aims to develop media in the form of smart physics cards in temperature and heat parameters to determine the feasibility and attractiveness of smart physics cards. This research is a development research using ADDIE model. The stages are analysis, design, development, implementation, and evaluation. Researchers analyse the curriculum and analyse the used learning media. At the design stage, researchers design smart physics cards as needed. After being designed, the smart physics card media is validated by 4 validators. At the implementation stage, smart physics cards are tested by teachers and class XI students in odd semester 2018/2019. The last stage is the evaluation; the product is evaluated as a form of final evaluation of the results of the pilot test of teachers and students. The results show that the smart physics card is very feasible and very interesting because it has been through the validation and testing stages with a percentage of achievements of 90% according to material experts, 86% according to media experts and 85% according to physics teachers of SMA/MA grade XI. The results of trials on high school/MA students of class XI showed a percentage of achievements of 84.2% with very interesting criteria. From this development research, it was concluded that the smart physics card on the material’s temperature and heat meets the requirements of a very decent quality and is very interesting to use as a learning medium for students of high school/MA grade XI.
Assessing Multidimensional Energy Literacy of High School Students: An Analysis of Rasch Model
Authors: Suryana T G S , Setyadin A H , Samsudin A , Kaniawati I
Published: March 2020

The research aims to assess multidimensional energy literacy among high school students. The research employed case study method. Participants involved in this research were 30 students (17 male and 13 female students) who had studied the concepts of energy. The data collection instrument was a questionnaire consisting of 25 multiple-choice questions for cognitive aspects, and 17 and 10 statement Likert-scale items for affective and behavioral aspects respectively. The data gathered were analysed using Rasch model. The results of analysis by using Ministep 4.4.1 in the form of Wright map display indicate that the literacy level of high school students on energy is discouragingly low and the teacher has not address students’ energy literacy in learning process optimally. In addition, scores on affective aspect are higher than cognitive and behavioral aspects. These findings provide information for future curriculum development, teaching and learning that can improve the energy literacy of high school students.
Experimentation of Problem-Based Learning Model on Critical Thinking Ability in Learning Number Theory
Authors: Agustina R , Farida N , Wicaksono S , Rahmawati Y , Istiani A , Arnidha Y
Published: March 2020

Critical thinking is needed in learning mathematics because it can train students to develop and analyze problems given. The research aims to determine the effect of PBL models on critical thinking skills in learning number theory. The research experimental design used was the one-group pretest-posttest. The subjects of this research are students of the Mathematics Education Muhammadiyah University of Metro who had taken the learning number theory. The instrument in this research was a critical thinking test. Data analysis techniques used in this research were (1) normality test using the Liliefors test, (2) homogeneity test using Bartlet test, and (3) hypothesis testing using paired mean difference test. Based on the results of data analysis, it can be concluded that: (1) There is an effect of PBL model on students’ critical thinking skills, (2) There is a difference in the average N-Gain score of students’ critical thinking skills before and after using PBL with observed = 12,025 > tcritical (0.05; 1) = 2,001., (3) PBL can increase in the average value proportion of each indicator of critical thinking.
Effect of Siger Rice from Waxy Cassava (Manihot Esculenta) on Oligosaccharide Levels and Chemical Blood Profiles in Mice
Authors: Subeki  , Ibrahim Gusri Akhyar , Utomo Tanto Pratondo , Yuliadi Erwin , Adawiyah Rabiatul
Published: March 2020

Siger rice is the Lampung term of Beras Singkong Segar which is artificial rice made from cassava. Siger rice is made from cassava which contains high amylose. The amylose comes out from the granules to bind water during the cooking and easily release the water and then the rice becomes hard and chewy. Therefore, Siger rice will be made from waxy cassava having no amylose to produce soft Siger rice after being cold. This research aimed to investigate the effects of Siger rice from waxy cassava on oligosaccharide levels and blood chemical profiles in mice. The research was conducted in a complete randomized block design with four replications. Siger rice was made from waxy cassava using a single screw extruder. The results showed that Siger rice has characteristics of white color, slightly cassava flavored, containing water (9.81%), ash (0.47%), fat (0.90%), protein (2.13%), crude fiber (4.79%), carbohydrates (81.90%), and glycemic index 30. The processing of waxy cassava into Siger rice can reduce levels of raffinose, stachyose, verbascose, and oligosaccharides 81.44, 92.09, 79.27, and 83.99%, respectively. Giving Siger rice to mice for 28 days had no negative effects on erythrocyte, hemoglobin, leukocyte, and hematocrit of mice.
Dynamic Analysis of Tippe Top on Cylinder’s Inner Surface With and Without Friction based on Routh Reduction
Authors: Ariska M , Akhsan H , Muslim M
Published: March 2020

Physics computing can be used to help to solve complex dynamic equations, both translation and rotation. The purpose of this study was to obtain differences in the dynamics of the tippe top with and without friction moving on inner surface of a cylindrical with varying initial state based of Routhian Reduction. The equation of tippe top in flat fields with and without friction has been reduced by the Routhian reduction method with the Poincare equation with computational in the previous research, and computation has also been carried out in the search for numerical solutions to the dynamics of tippe top with friction in the Maple program. In this study the reduction used is a Routhian reduction, so that the equation used in determining the equations of tippe top motion with and without friction that moves in a curved plane in the form of a cylindrical surface with varying initial state based on maple is Poincaré’s equation based on Routhian reduction with and without friction. The effect of friction can be seen clearly through the dynamics and graph equations in the return top. This method can reduce the equation of backward motion with and without friction that moves on the surface of the cylinder clearly in the form of a set of differential equations. This research can be continued by solving the dynamic equations of the tippe top in other curved fields such as the torus and ball. The findings of this study are dynamic equations and graphs of friction with and without friction equations that move in curved fields in the inner of surfaces in cylinders with varying initial state based on maple.
Utilizing Rasch Model to Analyze A Gender Gap in Students’ Cognitive Ability on Simple Harmonic Motion
Authors: Ringo Sariaman Siringo , Samsudin Achmad , Ramalis Taufik Ramlan
Published: March 2020

Previous research provided evidence that cognitive ability is one of the learning outcomes that students need to achieve. The purpose of this study was to analyze gender gap in cognitive abilities between male students and female students in learning of simple harmonic motion. The number of students involved in this research consisted of 14 male students and 22 female students with an age range of 15-17. The instrument employed in this study was a cognitive ability test with ten questions compiled based on Bloom’s taxonomy and was analyzed with the Rasch model. Cognitive ability which was measured included the ability to remember, understand, apply, and analyze. The data obtained were analyzed using person reliability, item reliability, Wright map, person measure, DIF and t-test. The results showed that there was no significant difference between male and female students’ cognitive ability. Therefore, the study indicated that there was no gender gap in students’ cognitive ability after attending physics class. However, students had poor cognitive ability, so educators need to design a simple harmonic motion learning process that is able to improve students’ cognitive ability.
Light Intensity Analysis Using Smartphone’s Light Sensor
Authors: Sriyanti I , Aliyana P , Marlina L , Jauhari J
Published: March 2020

Light is a form of electromagnetic energy radiation emitted in the visible part of the spectrum. This study was aimed to analyze the intensity of dynamic train light that moves constantly on a linear track using a smartphone light sensor. The method used in this research was the experimental method. The light sensor application used is available freely in the Physics Toolbox Suite on the smartphone. Experimental equipment was built using linear tracks, dynamic trains, flash light and lamp. Light sensor output produces luminosity (Ev) value versus time (s). The experimental results show that the light intensity at 3 volts with a distance of 5, 10, and 15 cm are 100, 250 and 300 cd, respectively. Whereas the intensity of light at 4.5 volts, the intensity of the light at distances of 5, 10, and 20 cm are 800 cd, 950 cd and 1200 cd, respectively. It is expected that the use of smartphones can increase students’ interest in learning physics concepts.
Guided Discovery Approach in the Development of Calculus Modules on Derivative Material with Islamic Nuance and Environmental Insight
Authors: Supriadi N , Diana N , Muhassin M , Farida  , Lestari B D
Published: March 2020

The development of teaching materials in the form of modules needs to be developed in calculus courses to help students understand derivative materials. This development research aims to determine the development and feasibility of the developed module, namely the calculus modules on derivative material with Islamic nuance and environmental insight. The method used in this research is Research and Development (R&D) using the 4D model proposed by Thiagajaran. The steps taken are to Define, Design, Development, and Disseminate. Based on the results of the research, the results of the validation by the material experts, media experts, and Islamic religious and environment experts are deemed valid. Based on small-scale testing on the product’s attractiveness, the module is declared as very attractive. Thus, based on the assessment of validators and small-scale trials, the developed module is declared as feasible.
Development of Junior High School Physics Science Teaching Materials Based on Critical Thinking Skills
Authors: Marlina Leni , Sriyanti Ida
Published: March 2020

This research is development research with Rowntree product development model which produced Physics teaching the material in junior high school. The purpose of this study was to produce learning media in the form of valid and practical teaching materials on pressure material and its application in daily life. The subject of the research was the teaching materials for Junior High School physics subject based on critical thinking skills. Indicators of critical thinking skills used in this study are providing basic explanations, building basic skills, concluding, making further explanations, and strategies and tactics. The results of the one-to-one-evaluation through a questionnaire given to teachers obtained an average score of 4.33 and the average score of participants divide 4.72. Both the teacher and the students stated that Physics teaching materials on pressure and its application in daily life based on the critical thinking skills category are very practical. Based on the results of this study, it can be concluded that the learning media in the form of teaching materials that are developed based on critical thinking skills on the pressure material and its application in daily life is suitable for use in learning physics in junior high school.
The Influence of Project-based Learning (PjBL) and Learning Style om Mathematics Communication Skills of Junior High School Students
Authors: Pratiwi Gita , Sova Faila , Putra Fredi Ganda , Yunian Putra Rizki Wahyu , Kusuma Arie Purwa , Rahmawati Nurina Kurniasari
Published: March 2020

Teachers have an important role to improve the mathematical communication skills of students as one of the skills to implement mathematical learning. The purpose of this research is to find out how the Project-based learning (PJBL) affects students ’ communication skills, to know the influence of learning styles on student communication skills, and to know the learning model interactions between Project-based learning (PJBL) and learning style to the communication skills of junior high school students. The method used is the quasi-experimental method. The study employed the two-way analysis techniques variance (ANOVA) with un-equivalent cells. Based on the results of the hypothesis testing, it can be concluded that (1) there is an influence of Project-based Learning (PJBL) which produces better mathematical communication skills than students in conventional learning, (2) there is a difference in the influence between auditory learning style, visual, and kinesthetic toward the students’ mathematical communication skills. Students with auditory and visual learning styles are better on mathematical communication skills, and (3) there is no interaction between learning models and learning styles toward students’ mathematical communication skills.