bluuebunny/crossref_metadata_2025 huggingface dataset:
Trade-off of mechanical and electrical properties in stretchable P3HT/PDMS blending films driven by interpenetrating double networks formation
Authors: Zhao Jingnan , Sun Lei , Chu Zhaoyang , Li Tian , Zhang Fapei , Li Liangbin , Zhang Wenhua
Published: March 2020

The balance of electrical and mechanical properties of conjugated polymers is extremely significant toward extending applications in wearable and implantable devices. Blending conjugated polymers with organic elastomers is a straightforward and facile way to improve the deformability of the materials. In this work, poly(3-hexylthiophene) (P3HT) nanowires were blended with a polydimethylsiloxane (PDMS) elastomer via spin-coating on two kinds of substrates, SiO2/Si and PDMS. Organic field-effect transistors based on P3HT/PDMS blending films were tested to evaluate the electronic properties of the films. The phase separation structures, surface morphologies, and the deformation under stretching were characterized by x-ray photoelectron spectroscopy, atomic force microscopy, and optical microscopy, respectively. A stratified structure with P3HT nanowires condensed at the interface formed on SiO2/Si, while an interpenetrating double networks structure yielded on the PDMS substrate. The double networks structure affords P3HT/PDMS blending films not only similar field-effect mobility in a wide range of P3HT content (≥5 wt. %) but also much enhanced stretching performance with respect to the net P3HT film. This double networks structure induced by polarity selection of the substrate might provide an efficient route to prepare flexible blending films with balanced mechanical and electrical behaviors.
Sobolev -spaces on -thick closed subsets of
Authors: Vodopyanov S. K. , Tyulenev A. I.
Published: March 2020

Letbe a nonempty closed set such that for someandthe-Hausdorff contentfor all cubeswith centreand edge length. For eachwe give an intrinsic characterization of the trace spaceof the Sobolev spaceto the set. Furthermore, we prove the existence of a bounded linear operatorsuch thatis the right inverse to the standard trace operator. Our results extend those available in the casefor Ahlfors-regular sets.

Bibliography: 36 titles.
An elliptic billiard in a potential force field: classification of motions, topological analysis
Authors: Kobtsev I. F.
Published: March 2020

Given an ellipse

,

, we consider an absolutely elastic billiard in it with potential

,

,

. This dynamical system is integrable and has two degrees of freedom. We obtain the iso-energy invariants of rough and fine Liouville equivalence, and conduct a comparative analysis of other systems known in rigid body mechanics. To obtain the results we apply the method of separation of variables and construct a new method, which is equivalent to the bifurcation diagram but does not require it to be constructed.

Bibliography: 17 titles.
Influenza hemagglutinin drives viral entry via two sequential intramembrane mechanisms
Authors: Pabis Anna , Rawle Robert J. , Kasson Peter M.
Published: March 2020

Enveloped viruses enter cells via a process of membrane fusion between the viral envelope and a cellular membrane. For influenza virus, mutational data have shown that the membrane-inserted portions of the hemagglutinin protein play a critical role in achieving fusion. In contrast to the relatively well-understood ectodomain, a predictive mechanistic understanding of the intramembrane mechanisms by which influenza hemagglutinin drives fusion has been elusive. We used molecular dynamics simulations of fusion between a full-length hemagglutinin proteoliposome and a lipid bilayer to analyze these mechanisms. In our simulations, hemagglutinin first acts within the membrane to increase lipid tail protrusion and promote stalk formation and then acts to engage the distal leaflets of each membrane and promote stalk widening, curvature, and eventual fusion. These two sequential mechanisms, one occurring before stalk formation and one after, are consistent with our experimental measurements of single-virus fusion kinetics to liposomes of different sizes. The resulting model also helps explain and integrate previous mutational and biophysical data, particularly the mutational sensitivity of the fusion peptide N terminus and the length sensitivity of the transmembrane domain. We hypothesize that entry by other enveloped viruses may also use sequential processes of acyl tail exposure, followed by membrane curvature and distal leaflet engagement.
Iron sequestration by transferrin 1 mediates nutritional immunity inDrosophila melanogaster
Authors: Iatsenko Igor , Marra Alice , Boquete Jean-Philippe , Peña Jasquelin , Lemaitre Bruno
Published: March 2020

Significance

Hosts sequester iron as a strategy to limit pathogen acquisition of this essential nutrient in a process termed nutritional immunity. Due to their in vitro antimicrobial activity, iron-binding proteins transferrins are suspected to play a role in iron sequestration. However, little is known about the in vivo role of transferrins. Here, we found thatDrosophila melanogasterexhibits infection-induced hypoferremia mediated by Transferrin 1. Due to excessive iron in hemolymph,Transferrin 1(Tsf1)-deficient flies are hypersusceptible to certain infections. Our study reveals that nutritional immunity is an important, previously unrecognized arm of immune defense inDrosophila. Using fly and bacterial genetics, we show that Tsf1 mediates nutritional immunity by sequestering iron from the pathogens in vivo on the whole-organism level.
Intervocalic voicing of Hungarian /h/
Authors: Deme Andrea , Bartók Márton , Gráczi Tekla Etelka , Csapó Tamás Gábor , Markó Alexandra
Published: March 2020

In this study, we investigated whether the amount of voicing, and the sound quality (expressed in HNR) of /h/ in syllable onset
are affected by intervocalic context (vs. post-pausal context), by backness and openness of the flanking vowels, and by a
phonological conditioner, pitch-accent. We showed that both measures were similarly high in all intervocalic positions
(irrespective of the presence of word-boundary and pitch-accent), while after a pause they were substantially lower, meaning
that /h/ was voiced, and more modally voiced intervocalically, than after a pause. Further, interaction of this effect with
that of vowel features led us to conclude that open, close, back, and front vowel groups should be considered internally
heterogeneous with respect to their effect on /h/ voicing.
Testing variability effects in Hungarian vowel harmony
Authors: Patay Fanni , Benkő Ágnes , Lukács Ágnes , Rebrus Péter , Törkenczy Miklós
Published: March 2020

Hungarian backness harmony shows various degrees of transparency and variation, but the empirical testing of these variability
effects in corpora is problematic because of data sparseness. We have created an experiment using harmonically mixed stems and
four different harmonic suffixes, and collected information about the variants from native speakers in the form of a sentence
completion task. We show that there are significant differences between stem types, and that the harmonic suffix can also
affect the behaviour of the stem. Our results confirm that native speakers can learn unnatural patterns and that they obey the
Law of Frequency Matching (Hayes et al. 2009).
With or without the definite article
Authors: Rákosi György
Published: March 2020

That noun phrases may constitute a binding domain is a key component among the parallelisms between the syntax of noun phrases
and clauses. Reuland (2007, 2011) and
Despić (2011, 2015) have shown
recently that the definite article plays a crucial role in delimiting this domain, since dedicated possessive reflexive
anaphors are only possible in languages that lack a prenominal definite article. Hungarian has several anaphoric possessor
strategies, which vary in whether they require, allow, or prohibit the use of the definite article in the possessive noun
phrase. This paper gives an overview of the grammar of these strategies, and presents a discussion of the results of a
questionnaire survey that was conducted to better understand the delicate distribution of the definite article in these
constructions. The importance of these Hungarian data lies in showing that Reuland’s conjecture describes an important factor
not only in cross-linguistic, but also in language internal variation in definite article use in possessive DP’s.
Differing attitudes toward Spanish sign languages in three Galician pre- and primary schools
Authors: Bao Fente Maria C. , Báez Montero Inmaculada C. , Vázquez-Veiga Nancy
Published: March 2020

Research into multilingual communities in Europe shows parallels between spoken languages and sign
languages in relation to the influence of school and family on the origin and transformation of linguistic attitudes.
Compared with the number and variety of studies on spoken languages, however, relatively little research has been
carried out on the question of linguistic attitudes to sign languages. The dearth of specific research is further
compounded by the methodological challenge of how to apply indirect research techniques to the study of visual-spatial
languages. The results obtained in this study confirm the influence of linguistic attitudes on the teaching of deaf
pupils, as well as the need to resource and promote the development of plurilingual curricula in different language
modalities.
Reactive oxygen species triggers unconventional secretion of antioxidants and Acb1
Authors: Cruz-Garcia David , Brouwers Nathalie , Malhotra Vivek , Curwin Amy J.
Published: March 2020

Nutrient deprivation triggers the release of signal-sequence–lacking Acb1 and the antioxidant superoxide dismutase 1 (SOD1). We now report that secreted SOD1 is functionally active and accompanied by export of other antioxidant enzymes such as thioredoxins (Trx1 and Trx2) and peroxiredoxin Ahp1 in a Grh1-dependent manner. Our data reveal that starvation leads to production of nontoxic levels of reactive oxygen species (ROS). Treatment of cells with N-acetylcysteine (NAC), which sequesters ROS, prevents antioxidants and Acb1 secretion. Starved cells lacking Grh1 are metabolically active, but defective in their ability to regrow upon return to growth conditions. Treatment with NAC restored the Grh1-dependent effect of starvation on cell growth. In sum, starvation triggers ROS production and cells respond by secreting antioxidants and the lipogenic signaling protein Acb1. We suggest that starvation-specific unconventional secretion of antioxidants and Acb1-like activities maintain cells in a form necessary for growth upon their eventual return to normal conditions.
Key comparison BIPM.RI(I)-K3 of the air-kerma standards of the LNE-LNHB, France, and the BIPM in medium-energy x-rays
Authors: Burns D T , Kessler C , Plagnard J
Published: March 2020

A key comparison has been made between the air-kerma standards of the LNE-LNHB, France, and the BIPM in the medium-energy x-ray range. The results show the standards to be in agreement at the level of the standard uncertainty of the comparison of 3.8 parts in 103. The results are analysed and presented in terms of degrees of equivalence, suitable for entry in the BIPM key comparison database.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.

The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Neural networks and behaviour based control for education botanical robot navigation
Authors: Burhanuddin A , Supriyadi S , Malik M
Published: March 2020

The development of robots began when the military needed it as war equipment, and then it was used by some industries to develop production until now widely used for education and agriculture. Educational robots are usually more universal and simpler than industrial or military robots because robots for education are made only for simulations or prototypes. In this study, the authors surveyed prototypes of Educational botany robots, namely robots used to distinguish fruit maturity. In this journal, the behaviour-based control (BBC) algorithm will continue implemented into mobile robots. The movement of the mobile robot prepared in advance, and then actually the mobile robot is wheeled compared to the desired path. Besides, both kinematic and dynamic smelling mobile robots are derived and considered. In this study, only focused on mobile robots three-wheel differential drive, which will explore in a circular and straight path. In this journal, it can be found that image processing techniques can be used to determine the maturity of watermelons which are shown in different average values in each image obtained by the camera. The best models are generated by layer 32 hidden with an accuracy value of 87% at the training dataset level 60:10:30. The Behaviour Based Control Method has directional movements. But there was an error in each test so that I couldn’t take the watermelon correctly. The error rate reaches 25% from 40 tests or about ten failures in the form of deviating from the object point.
Development of Mind Mapping Pocket Book in Quadrangular Materials to Improve Self Regulated Learning of Grade VII Junior High School Students
Authors: Hilmiyah P J , Krisdiana I , Susanti V D , Andari T
Published: March 2020

This research is a development research that aims to determine the validity, practicality, effectiveness of learning media using mind mapping pocket books in quadrangular material to improve self-regulated learning of class VII students of SMP Negeri 7 Madiun. The type of research used in this study is Research and Development (R&D) with the ADDIE model which consists of five steps, namely: 1)analyze, 2)design, 3)development, 4)implementation, and 5)evaluation. The research subjects consisted of two types, namely the limited test subjects with 6 students from VII-B class and field trial subjects with 32 students from VII-G class. The research instruments used were learning media validation sheets (validity aspects), student response questionnaires (practical aspects), learning outcomes tests (effectiveness aspects), N-gain tests (increased self regulated learning) The results of this study were: 1) Learning media mind mapping pocket books in quadrangular meet high validity criteria with an average value of 88.89%, 2) pocket book learning mind mapping media in quadrangular meet high practicality criteria with an average value of 4.28 in limited trials and 4,21 in field trials, 3) mind mapping pocket book learning media in quadrangular material fulfills the effectiveness criteria percentage of students completing learning by 93.75%, and 4) Pocket book mind mapping learning media on quadrangular material can improve self regulated learning students with the results of the N-Gain average of 70.49.
Teaching-Learning of Phosphor-based LEDs Using Science, Environment, Technology and Society (SETS) Approach
Authors: Nuvitalia D , Novita M , Suciati S , Cholifah N
Published: March 2020

In order to face the industry 4.0, Indonesia uses the so called K-13 curriculum which prioritizes in student’s character building based on local wisdom. Therefore, teachers have responsibility to continuously improve the teaching-learning method along with the rapid technological development. Up to recently, there are many teaching-learning approaches has been introduced such as science, environment, technology, and society (SETS). One teaching-learning approach emphasizes in the connection between the real event in our everyday life with science, environment, technology, and social life. Phosphor-based (Light Emitting Diode) LED is one of the current increasing attention topics in the lighting technologies, which plays a very important role as general lighting source. Therefore, it is important to introduce this technology from the earliest stage of education. This paper will describe the teaching-learning method of the current technology, phosphor-based LED, using SETS approach in K-13 curriculum.
The Implementation of Multiple Media in Improving Reading Comprehension Skill in the University Students
Authors: Aprianto E , FHeriyawati D
Published: March 2020

Most nations in the globe have recognized English as an international language. Consequently, English must be used in internationally both spoken and written communication. The people who live in the country which English to be the foreign language or even the second language has to learn it. In order, they can communicate with all people in the world globally. The teaching English as a foreign language in Indonesia has the objective to improve students’ capacity in acquiring the language itself. Among four language skills; reading one of the skill to be learned because by understanding the text, it can help the students to comprehend the knowledge of science and technology. Reading is also the “gate” to acquire science and technology. Through reading the text, the students will gain a lot of knowledge related to their field. Regarding the importance of the students in comprehension of the text, then, the objective of this paper is to give the contribution idea to improve the students reading comprehension skills for university students by using multiple media and creating the effective teaching-learning process in the higher education institutions. The final results of this study showed that the implementation of multiple media improve the students’ ability in comprehending the English text because the student feel enjoys the teaching and learning of reading. It is hoped that the use of various creative multiple media will use not only in reading classroom but also in other subjects of English learning.
Integrated STEM Project Based Learning Implementation to Improve Student Science Process Skills
Authors: Bhakti Y B , Astuti I A D , Okyranida I Y , Asih D A S , Marhento G , Leonard L , Yusro A C
Published: March 2020

This research aims to investigate the influence of project based learning (PjBL) learning that integrates with science, technology, engineering, and Mathematics (STEM) on optical concepts with improved student science process skills. The method of study used is a descriptive method. Data is obtained from a learning observation sheet to determine the skills of the science process developed by students and polls used to capture student responses to learning. The instrument in this study uses a science process skills test in the form of an observation sheet and a subjective test. The science process skills tests used in this study include asking questions, observing, hypothesized, planning experiments, interpretation, and communicating. The Data that has been obtained is then analyzed descriptively. The results of this study show that students have all indicators of the science process skills that belong to the good category (average rating 79.33). Students give a positive response to learning, because they feel more understanding, improving motivation and learning interests.
Visual reasoning analysis of female students in solving mathematical problems
Authors: Darmadi D , Sanusi S
Published: March 2020

To solve the problem of mathematics, students need reasoning. Visualizations can help in reasoning. This paper discusses the results of visual reasoning analysis of female students in solving mathematical problems. The method of study used is a qualitative method with the subject of female students of the Mathematics Education Study Program of Universitas PGRI Madiun. Data is validated with time triangulation. Data that is natural, deep, and widespread are displayed and analyzed. The conclusion of the study is: 1) to solve mathematical problems, female students perform complex steps of completing Polya, namely: understanding problems with visualizations, planning a problem solving with mathematics, planning a problem solving with elimination/substitution, implementing a plan to solve problems with elimination/substitution, checking results, planning to solve problems with determinations, implementing plans to solve the problems with determinations, examine results, plan to solve problems with coordinate points, implement plans to solve problems with coordinate points, check the results of the sponsorship with the coordinate points; 2) every activity in resolving the problem, female students have done reasoning. However, not all activities are identified to perform visual reasoning. Students tend to still focus on formalities; 3) in the issue, the subject performs reasoning deductive or inductive and visualizes contextually or mathematically as needed.
The effect of problem based learning (pbl) model on student learning motivation inproducts, creative and entrepreneurship subject in Eleventh Grade of SMK PGRI 1 Jombang
Authors: Munawaroh M , Setyani N S
Published: March 2020

The teaching and learning process at SMK PGRI 1 Jombang is still using teacher centered and itis the only one source of information obtained by students. So, it is necessary to be done student-centered learning model in order to be able to provide student motivation. The purpose of the study is to explain whether any effect of the use of Problem Based Learning (PBL) Model on Students Learning Motivation to Product, Creative and Entrepreneurship Subjects in eleventh grade students of Management AutomationOffice Department. The study employed quantitative research design. The data were collected through observation, questionnaire, and documentation, then analyzed by simple linier regression formula. The findings showed that the value of ttestwas at sig 0.001. It indicated that the significant value is lower than 0.05 or (0.001 <0.005). Therefore, Ho is rejected and Ha is accepted. It implied that there is significant effect of the use of Problem Based Learning (PBL) model on student motivation. Moreover, the value of R2 was 0.383. It showed that the independent variable called Problem Based Learning (PBL) Learning Model influence the students’ learning motivation at 38.3 %, and 61.7% are influenced by other factors, such as learning achievement and criticalthinking skills.
Implementation of the scientific approach on social studies learning based on local wisdom through advanced organizer learning models of the students of junior high schools
Authors: Sudarmiani  , Trilaksana A
Published: March 2020

This study aims to determine the implementation of the Scientific approach in Social Science Based Local Wisdom Learning through the Advance Organizer Learning Model. The implementation is expected to be able to improve student learning outcomes and activeness in the learning process. This research method is a research development carried out with reference to the Plomp development procedure. The Plomp model is seen as more flexible and flexible because at each step it contains development activities that can be adapted to the characteristics of the research. Stages include: (1) planning, (2) implementation of actions, (3) observation and (4) reflection in the form of evaluation (semi-summative evaluation). Scientific approach to social science learning models based on local wisdom through an advance organizer can improve student learning outcomes and learning activities.
The Application of the K-Nearest Neighbors Method as A Recommendation for The Selection of Departments in Higher Education Based on The Results of Multiple Intelligence Tests
Authors: Nuswantari N , Rachman Y F , Setiawan P W D , Prakoso W D
Published: March 2020

The problem faced by students after graduating from High School or Vocational High School is the difficulty in deciding whether to work immediately or going to college. The next problem for students who will enter college is to choose which major study based on their type of intelligence. Determination of Departments that are inappropriate often makes students unable to do well in lectures. The problem of this study is whether the selection of Departments for the University of PGRI Madiun in 2019 is in accordance with the type of intelligence or not. The purpose of this study is to recommend the selection of Departments at the University of PGRI Madiun students based on Multiple Intelligence test results. This research is quantitative research and data collection is done qualitatively. The research subjects were students of PGRI Madiun University in 2019. The sampling technique used purposive sampling with a sample of 297 students from 4 Faculties and 22 Departments. The technique of collecting data using the multiple intelligence test questionnaire. The research data were analyzed using the K-Nearest Neighbors method. The results of the study showed that the suitability of the choice of Departments of the University of PGRI Madiun students based on multiple Intelligence test for the Faculty of Health and Science had the highest accuracy of 86.36%, Faculty of Teacher Training and Education (Sains) 63.04%, Faculty of Teacher Training and Education (Social) 32.28%, Faculty of Teacher Training and Education (Language) 58.62%, Faculty of Technology 56.67%, Faculty of Economics and Business 48.84%.
Types of proportional reasoning of seventh grade junior high school students in Jombang
Authors: Hidayati W S , Tristanti L B
Published: March 2020

This research is a descriptive qualitative research that aims to describe the type of proportional reasoning of students. The research subjects were seventh grade students of SMP in Jombang Regency. The subject selection procedure is by purposive sampling. Data collection is done by means of tests, think aloud methods and semi-structured interviews. Data validity uses time triangulation. Data analysis techniques are carried out by: (1) grouping data in 4 categories, then reducing data not included in the 4 categories, (2) presenting data in narrative texts, and (3) concluding the type of proportional reasoning students then comparing subjects that are on the same type of proportional reasoning. Based on research conducted on 150 subjects of class VII SMP in Jombang regency, there were 62 students using cross multiplication, 30 students used additive reasoning, 45 students used multiplicative reasoning and 13 students used a mix of additive and multiplicative reasoning. Additive reasoning, the way the subject does it is to add one by one to many caterpillars associated with many leaves. In determining the missing value, the subject uses multiplicative reasoning by determining the scalar number first. Subjects with a mix of additive and multiplicative reasoning use numerical calculations and use images to reason problems. Cross multiplication, Subjects use the concept of comparable value by specifying unknown elements with a variable. Although not all subjects use formal reasoning (cross multiplication) in completing, but the reasoning of class VII students shows that it includes relative reasoning. They don’t just pair numbers with numbers. Although, there are subjects who do not fully understand invariant and covariant relationships
Basic education and training priority on strategy of empowerment of micro and small industry of leather craft in Magetan regency
Authors: Susilowati L , C Fajri A , Ashar K , Susilo S
Published: March 2020

This study aims to determine the empowerment strategy of micro and small industries of leather craft in Magetan. By using the same data from 10 selected respondents from Department of Industry and Commerce (DISPERINDAG) Magetan Regency, the owner of micro and small industry of leather craft, and leather craft community. The analysis technique used Analytical Hierarchy Process (AHP). The AHP results show that there are four alternative fields that are the respondents, the first are human resources, the second are innovations, the third are productions and the last are marketing. Based on the results of AHP analysis, the alternative program in the whole program of empowerment of micro and small industries of leather craft in Magetan Regency are: 1) Basic education and training with Leather Hall and College, 2) Skill improvement, 3) introduction of new products, 4) training and creativity of production, 5) opening market opportunities through exhibitions and social media, 6) reduce sales tax for micro and small industries, 7) entrepreneurship training, 8) new production technology, 9) development of existing products, 10) provide galleries for the marketing of micro and small industries, 12) facilitate the procurement of raw materials.
Novice and Experienced Mathematics Teachers’ Decision Making Process in Designing Math Problem
Authors: Murtafiah Wasilatul , Sa’dija Cholis , Chandra Tjang Daniel , Susiswo  , Zayyadi Moh.
Published: March 2020

This study aims to explore the decision-making process of novice and experienced teachers in designing mathematics problems. Data collection of decision-making process is done by interview based on the results of observations of problems designed by the teacher and the framework that includes the stage of generating ideas, clarifying ideas and assessing the reasonableness of ideas in creating mathematics problems. The findings show that in generating ideas, novice teachers are still less creative than experienced teachers. In clarifying ideas, experienced teachers always associate problem with real contexts close to students, while novice teachers create problems based on contexts that are still less associated to students’ real life. When assessing the reasonableness of ideas, novice and experienced teachers alike have the confidence that the problems are designed according to students’ abilities in which experienced teachers claimed that the problems also supported by students experiences.
Biology prospective teachers’ critical thinking disposition and critical thinking skills of IKIP Mataram
Authors: Hunaepi  , Firdaus L , Samsuri T , Susantini E , Raharjo
Published: March 2020

Preparing prospective teachers as professional teachers is a very basic part of universities based on education and teacher training. In order to support professionalism career, prospective teachers must be equipped with 21st century skills, one of which is critical thinking skills, but to be able to think critically, prospective teachers must also have a critical thinking disposition, because critical thinking disposition is a prerequisite for acquiring critical thinking skills. This research is a survey study aimed at explaining the relationship between thinking dispositions and critical thinking skills. The prospective teachers critical thinking skills data were collected using essay questions, while the critical thinking disposition was collected using a critical thinking disposition questionnaire adopted from the California Critical Thinking Disposition Inventory (CCTDI). The Sample in this research is taken by simple random sampling, obtained sample or respondent as many as 103 prospective teachers. The data in this study was statistically analyzed using Pearson product-moment (r). Based on the result of an analysis, R-value is 0.209. This r value indicates the low critical thinking disposition of prospective teachers, although there is a relation between the critical thinking disposition itself and the critical thinking skills of the prospective teachers, so that the value of r also indicates to be taught about the critical thinking disposition to the prospective teachers to acquire critical thinking skills as their professional career supporters.
Digital literacy for children based on steam in family education
Authors: Purnamasari I , Khasanah I , Wahyuni S
Published: March 2020

Technology is part of our life and it cannot be separated from our daily life. Consciously or not this will affect the behavior of each individual. Rapid progress in technology makes the children of the current generation increasingly grow into smarter and more critical generation. Fortunately, most parents often use this sophisticated technology as a means to make the children stay busy or as a means for negotiating with them. So, it is necessary to apply an appropriate method. STEAM which stands for Science, Technology, Engineering, Art, and Mathematics is a very important method in child development. This method emphasizes on active learning, and it stimulates children to solve problems. Through STEAM children are trained to focus on solutions, to build logical and systematic ways of thinking and to improve their critical thinking. All of them are intended to prepare the children to build their sense of competitiveness and to prepare them for career opportunities in the technical and creative fields in the future. Family as one of the smallest units in society can be the main agent in reviving digital literacy. Therefore, family also plays an important role for the success of the program.
Statistical reasoning levels and error analysis of prospective mathematics teacher students
Authors: Rozak A , Nurwiani
Published: March 2020

This paper describes the level of statistical reasoning and the difficulties and errors that occur in statistical problem-solving in prospective mathematics teacher students at STKIP PGRI Jombang. This research is a qualitative study with a case study strategy, the case study in the process of solving statistical problems carried out by the subject. The research subjects were the 69 students at third-semester of Mathematics Education Program STKIP PGRI Jombang who had taken descriptive statistics. The results of this study indicate that students are not found at the idiosyncratic level, most of them are at the transitional and quantitative level, while the analytical level is still a minority
The potential of discovery learning models to empower students’ critical thinking skills
Authors: Chusni Muhammad Minan , Saputro Sulistyo , Suranto  , Rahardjo Sentot Budi
Published: March 2020

Critical thinking skills have become the competencies of educational goals. This article aims to examine the potential of discovery learning models that are applied in science learning to empower students’ critical thinking skills. The method used is qualitative with the main source of literature review about discovery learning models and critical thinking skills. The results of the analysis of the discovery learning model literature with orientation, hypothesis generation, hypothesis testing, conclusion, and regulation stages. Discovery learning model has the potential to empower critical thinking skills starting from the hypothesis generation stage which aims to provide a rational argument from a real phenomenon orientation phase which is continued by the process of interpretation, analyzing, evaluating, concluding the experimental results of the hypothesis testing stage until the right conclusion is obtained from the experimental results.
Collaborative Learning Group Investigation Type Based on Lesson Study in MI Al-Ikhsan Kota Jambi
Authors: Louisiana M , Nasyariah S , Haerul P
Published: March 2020

The lesson study has been done with the collaborative learning model group investigation type for 2 cycles. Each cycle consists of 3 stages like plan, did and see. Each cycle is carried out with the same learning model but different using learning media. There were several items for reviewed and preserved in the implementation of the lesson study like relates students’ skills with the ability of students to answer questions, the interaction of students with teachers, and the interaction of students with students. In addition, the results of this study indicate an increase in learning outcomes for each cycle.
Developing Electronic Learning Media Using 3d Pageflip On The Material Of Classification Of Living Thingsfor the 7th Grade Students Of Junior High School
Authors: Yelianti Upik , Anggereini E. , Irfan M. K.
Published: March 2020

The aim of this research is to develop the electronic learning media using 3D Pageflip on subject matter of Classification of living things for the Seventh Grade of Junior High School. Based on observation in several junior high schools in Jambi district, it is found that the subject matter about Classification of living things is difficult to understand and boring due to many organism in world that must be studied and every organism have the specific characters and it usually uses Latin. One of the solution of the problem is to develop the electronic learning media using 3D Pageflip. The 3D Pageflip is the software that is completed with several learning material like: power point, students worksheet, video, animation, pictures, photos. Research and development was designed by using ADDIE’s model following five steps namely: Analyze, Design, Develop, Implementation and Evaluation. The qualitative data was obtained from validator suggestions, and the quantitative data was collected through the trial test of the seventh grade students of Junior high school. This media was validated by the experts. The result of the design obtained the score of 70 (93%) with very good category. The result of content obtained the score of 41 (82%) with very good category. The suggestions from validators were used to revise the learning media. The trial test was also carried out to the biology teacher of Junior High School 7 Muaro Jambi and obtained the score of 60%, that is categorized to very good. The students conveyed that the media is appropriate to be used for the seventh grade students, in which obtained the score of 3.92. In conclusion, the electronic learning media in the subject of Classification of living things is very good and appropriate to be used for the seventh grade of Junior High School students.
Blended Learning Strategy on Disaster Mitigation Learning to Improve Character Care of The Environment
Authors: Mustolikh  , Budimansyah Dasim , Darsiharjo  , Nurdin Encep Syarief
Published: March 2020

Humans are given freedom in managing the earth, but everything must be carried out with a full sense of responsibility. The position of humans is only as users, enthusiastic, or managers, and not the ruler, so humans should not arbitrarily treat the earth. If there is damage to the earth or natural disasters, it must be believed to be the result of human actions, not naturally, because from the beginning, the universe was determined to meet human needs. The research tried to find the way to improve students’ character environment concern on grade XI SMA Negeri 1 Rawalo students using blended learning strategy on disaster mitigation learning. The data were from observation, interview, and documentation. Then, they were analyzed by qualitative analyzing. Blended learning strategy implementation on disaster mitigation learning was effective to improve students’ character environment concern. It could be seen on the class and school situation that had been clean, neat, fresh, and green. This proves that students’ concern for the environment can affect the development of student character, especially the character of discipline and responsibility in protecting and caring for the environment.
Optimization of Floating Tablet Containing Glibenclamide Using Simplex Lattice Design
Authors: Siswanto Agus , Al Iman Reza Aditya , Genatrika Erza , Djalil Asmiyenti Djaliasrin , Gawa Panulung Iwangga Afif
Published: March 2020

Glibenclamide is a second generation sulfonyl ureas drug that are widely used in diabetes type 2 therapy. Glibenclamide in floating tablet formulations is used to improve the bioavailability. The aim of this study was to determine the optimum composition of floating tablets of glibenclamide by simplex lattice design. The tablets were prepared by wet granulation technique, using HPMC K100LV and Carbopol 940 as polimers. The optimum formula was determined based on numeric method with physical properties, floating characters, and dissolution profile of tablets. the results of the study show that glibenclamide floating tablets have good physicochemical properties. The combination of HPMC K100LV and Carbopol 940 decreases floating lag time and dissolution rate of floating glibenclamide tablets. The optimum composition of glibenclamide floating tablet was HPMC K100LV 44.29 mg and Carbopol 940 15.71 mg with desirability value 0.989.
Gesture of slow learner student in mathematical Communication
Authors: Sovia A , Herman T
Published: March 2020

This article discusses the gesture of slow learner students in solving the problem of mathematical communication. Gesture aims to understand and deepen the thinking process of students who have difficulty conveying ideas either with oral or written. This research is a qualitative research. Data were collected by giving two items of mathematical communication test to a fourth-grade slow learner student of elementary school, then the student gesture was observed through video recording which was obtained when students did the question. The results of this study reveal the pattern of slow learner gesture, i.e.: Iconic gesture: using the fingers and toes in counting. Representational gesture: the student could not answer a question with a clear rational, student was less able to explain her ideas, but did not feel embarrassed to ask. Writing gesture: student could write her ideas in writing after a given direction, but she still made a mistake in writing the mathematical symbols (like numbers) and forgot to write arithmetic operations (addition operation). For further research it is necessary to look at gestures with a greater number of samples and variations, both in terms of gender, grade, or cases of other children with Special Needs.
Characteristics of Cracking Palm Oil Methyl Esters in Temperatures 280°C using Zeolite Natural Catalyst of Mamasa
Authors: Denny  , Sarungallo R. S. , Patangke G. , Halimaking W. L. , Taba P. , Soekamto N. H.
Published: March 2020

The aim of this study is to characterize cracked products by GC-MS analysis and test the performance of natural zeolite catalysts originating from Mamasa in the catalytic crack reaction of methyl esters from palm oil for short chain hydrocarbons at 280°C. The method used for catalytic cracking of methyl ester includes 3 steps, namely the preparation of natural zeolite catalyst, catalytic cracking reaction at 280°C temperature, and analysis of cracked methyl ester. The characteristics of GC-MS cracking methyl esters indicate the addition of palmitoleic acid, and oleic acid. Cracking reaction of methyl ester at 280°C does not occur, the conversion of the reaction to form undesirable compounds namely carbon chains > C15, so the natural zeolite catalyst from Mamasa is not selective for cracking reaction at 280°C.
Fermentation Juice Sweet Sorghum Genotip 4-183A using Batch System by Optimizing the Concentration of Inoculum and Substrate
Authors: Sarungallo R S , Melawaty L , Djonny M , Bulo L , Mangera L , Pabendon M B , Sarungallo Z L
Published: March 2020

The potential of sweet sorghum in Indonesia as a raw material for bioethanol production is very large. Sweet sorghum is a plant not a food crop. Sweet sorghum juice is a liquid containing sugar can be produced by extracting or pressing sorghum stems. The sugar content of sweet sorghum juice varies depending on the type, one of which is genotype 4-183 A. The purpose of this research is to optimize the conditions of inoculum and substrate using a batch system. The parameters to be analyzed are the percentage of bioethanol yield, total biomass or yeast cells and total sugar content. This research shows that the process of fermentation-batch of juice sweet sorghum of genotype 4-183A with 9% optimum inoculum concentration and 16% optimum glucose concentration can produce high concentrations of biethanol.
Prospective strategies for sustainable local economic development in support of the SDGs’ goals “inclusive and sustainable economic growth” in the border region of Indonesia – Timor Leste, Belu Regency, East Nusa Tenggara Province, Indonesia
Authors: Paulus Chaterina A , Azmanajaya Emil , Pellokila Marthen R , Paranoan Natalia
Published: March 2020

In supporting inclusive and sustainable economic growth from the SDGs Program, Indonesia through the National Development Agenda (Nawacita) program takes a role in building border areas that are relatively isolated from relations with growth centers and centers of economic activity. The purpose of this paper is to formulate a sustainable local economic development (LED) strategy through a system approach, namely prospective analysis. Strategies developed based on scenarios that might occur in the future by considering the influence and dependence of key factors on competitiveness and performance. The results of prospective analysis are scenarios for developing LEDs through rural business incubator with an ability of technological innovation. This scenario is an optimistic scenario for establishing a rural business unit or known as BUMDes by taking into account the factors of competitiveness and performance. This scenario will occur if all the main competitiveness factors include technology innovation, rural business incubators, institutional cooperatives, product diversification and product marketing develop positively. Meanwhile, the operational recommendations from the chosen scenario are that the regional government needs to decide on a conducive policy to develop LEDs into professional and independent BUMDes. In addition, local governments need to operationally monitor and evaluate the main performance of BUMDes in order to increase economic growth in an inclusive and sustainable border region.
Selection of regularization parameter in sparse inverse problems for DOA estimation
Authors: Delmer Alice , Ferréol Anne , Larzabal Pascal
Published: March 2020

This article deals with the selection of the regularization parameter of a sparse ℓ
0 regularized criterion for DOA (Direction-of-Arrival) estimation. This parameter is generally empirically obtained. In this paper, we establish a theoretical range for this parameter allowing a correct estimation for a single observation. Considering that an observation is the eigenvector associated with the maximum eigenvalue of the covariance matrix, we extend the analysis to multiple observations. Numerical results support our theoretical investigations.
A multi-resolution computational method to solve highly non-linear inverse scattering problems
Authors: Salucci Marco , Polo Alessandro , Xu Kuiwen , Zhong Yu
Published: March 2020

An innovative computational method to solve inverse scattering problems is proposed for retrieving the electromagnetic properties of unknown targets. The proposed technique is based on the contraction integral equation for inversion (CIE-I) method to mitigate multiple scattering contributions when imaging strong scatterers. More specifically, the CIE-I is integrated in an effective multi-resolution (MR) scheme to reduce the ratio between unknowns and non-redundant data as well as to exploit iteratively acquired information on the scenario for yielding higher-resolution reconstructions. Some preliminary numerical results are reported to assess the capabilities of the proposed MR-CIE-I method.
Bayesian data assimilation with Transport Map sampling and PGD model order reduction
Authors: Rubio P-B. , Louf F. , Chamoin L.
Published: March 2020

The motivation of this work is to address real-time sequential inference of parameters with a full Bayesian formulation. The Transport Maps method allows to determine a coupling between a reference density and the posterior density. Here, the contribution is to use the Proper Generalized Decomposition method (PGD) to reduce the evaluation cost of the multi-parametric numerical model and to speed up the minimization algorithm in the Transport Map method by calculating the models derivatives with reference to the parameters in a straightforward manner with non-analytical models. A numerical example highlights the performance of the method.