bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ethnobotanical study of Kumpai Babulu (Paspalidium punctatum) to community of watermelon farmers in Palangka Raya
Authors: Ayatusaadah  , Mulyono Yatin , Handayani Isnaini Siwi , Ulfa Anna Vania , Qamariah Zaitun 
Published: June 2020

Abstract
The purpose of this study is to contribute to the development of knowledge-based on local wisdom by describing the origins and techniques of using Kumpai Babulu grass (Paspalidium punctatum), botanical description and its importance to the community of watermelon farmers in Bangaris, Palangka Raya. This study uses descriptive qualitative methods with three stages; preliminary study, ethnobotanical survey and data collection. Data collection was carried out through 4 research instruments which consist of observation, interviews, documentation and literature study. The data obtained were analyzed descriptively with validity techniques using data triangulation. The results showed that the community of watermelon farmers in Bangaris-Palangka Raya, Central Kalimantan have cultivated Kumpai Babulu (Paspalidium punctatum) as an organic mulch in watermelon farming, a technique used as a legacy from generation to generation from their hometown, Negara, Hulu Sungai Selatan, South Kalimantan. They have utilized two techniques in processing Kumpai Babulu mulch, by spraying herbicides and rolling techniques until the grass dries and is ready to be used as mulch. Watermelon farmers’ community in Bangaris were also utilizing these species as animal feed and organic fertilizer. This shows that Kumpai Babulu (Paspalidium punctatum) has an important role, especially for the economy of the community.
The role of performance and self-assessment to determine students’ science process skills in SMP Negeri 11 Kota Tangerang Selatan
Authors: Sejati F U A K , Saputro S , Indriyanti N Y 
Published: June 2020

Abstract
This study aims to describe the pattern of students’ scientific processes based on observations when performance appraisals are carried out. Science process skills are assessed using performance indicator instruments and supported by student self-assessment instruments. The research method used in this research is descriptive analysis. Data collection instruments in this study were observation sheets, student worksheets, and self-assessment sheets. Research subjects were 38 students of grade seventh in SMP Negeri 11 Kota Tangerang Selatan. The results of the study showed from 3 out of 10 aspects of observed skills that still score below 80%. These aspects were aspects of asking (75%); apply the concept (77.7%), and communicate the results (65.5%). However, three aspects have been in the good category. The aspects of science process skills with 100% value owned by students are aspects of prediction and hypothesis formulation. There are two aspects of science process skills that have opposite results from the results of students’ self-assessment, namely aspects of developing hypotheses and communicating. Hypothesis aspect in self-assessment has a value of 79%, this is contrary to the results of observations using performance appraisal. In addition, the aspect of communication in self-assessment also has the opposite results from observations in a performance evaluation that is equal to 89%. Even so the category of science process skills possessed by students in the assessment of performance indicators and self-assessment included in both criteria.
Effectiveness of air filter equipment based on water Hyacinth on combustion smoke
Authors: Sari Lindah Permata , Suparno  , Fatharani Mirra , Pahlifi Dwi Maihidin , Adrizal Mohd. , Luliyanti Dian Sukma 
Published: June 2020

Abstract
Indonesia as an agrarian country has a variety of plantation plants. The oil palm plantations are widely spread on two islands of Indonesia namely Sumatra and Kalimantan. In these two areas, there is a risk of being affected by the haze disaster. Forest and land burning smoke contains carbon dioxide gases (CO2), carbon monoxide (CO), hydrocarbon (HC) and particles. This study aims to determine the effectiveness of air filter device using water hyacinth cellulose material in combustion fumes. The air filter was filled with a solution of water hyacinth cellulose with variations in concentrations of 5%, 7.5%, 10%, 12.5%, 15%, 17.5%, 20% and 22.5%, 40% NaOH solution and 10% zeolite solution. Filter device were tested by using a gas analyzer. The gas levels of CO2 and HC in combustion fumes were 5.82 vol% and 126 ppm vol. The test results showed that the device could reduce the levels of carbon dioxide (CO2) and hydrocarbons (HC) in combustion fumes. The most effective device was used to reduce CO2 gas by using 20% cellulose solution where the effectiveness of the device was 100%. The most effective device was used to reduce HC gas by using 22.5% cellulose solution where the effectiveness of the device was 90.48%.
The role of students’ critical thinking skills in junior high schools on chapter organism and its environment
Authors: Ratnasari Novita , Sarwanto  , Adi Prayitno Baskoro 
Published: June 2020

Abstract
Thinking skills, especially critical thinking skills are complex skills currently needed by every individual to analyze personal and social problems that exist in the environment with a broad and detailed format. This study aims to analyze and classify the students’ level in constructing critical thinking. The subjects of the study were 20 students of class VIII B MTs PSM Tanen Rejotangan Tulungagung in academic year 2019/2020. Data were collected through interviews and tests of critical thinking skills. The critical thinking skills test instrument consists of 10 essay questions, including 6 indicators. The test instrument used has been tested as valid and reliable as a measuring instrument. Test was validated by experts and the results of the validity, reliability, difficulty index and discrimination power levels were determined as a good test instrument to use as critical thinking skills test for students. The analysis was conducted on the results of students’ tests and categorized into five categories of critical thinking skills, consisting of very good (VG), good (G), medium (M), less (L) and very less (VL). The results showed that 75% of students had critical thinking skills with very less categories (VL) and 25% of students had less categories (L) in critical thinking. The average score of the highest critical thinking indicators obtained in the explaining indicator is equal to 41.5. The indicators analyzing have the lowest average score of 9. The results show that students’ critical thinking skills still need to be improved for future study.
The magic of local plants for the community prosperity and the economics of Argosuko village
Authors: Indriwati SE , Baidlowi H , Fanani L , Sulasmi ES , Lestari SR , Priambodo B 
Published: June 2020

Abstract
Village areas that classified as the poor or undeveloped places usually characterized by the majority of the population as farmers. The large population of farmers makes them have many of the plant commodities that can be used as medicinal plants or others such as drying to be simplicia. Simplicia is a dry form of the plant parts such as from seed, branch, leaf, root, flower or the fruit. Therefore, this research purposed to know the diversity of local plants that have a potency to be an additional income for local people of ArgosukoVillage, Poncokusumo District, Malang and also to improve and educate the local people on how to process the plant to be a simplicia. The result showed that there are 30 species of plants that have the high potency to be converted into simplicia. Besides the plant species survey, We also give knowledge about simplicia on how to process, how to package the products, and also how to make a license their products from simplicia. The high opportunity of Argosuko Village to improve their prosperity and economy are widely open, supported by the availability of materials (local plants) and the willingness of Argosuko people to trade its products. For further study we arrange to analyze the local plants ingredients in Argosuko Village to strengthen product licensing.
Improving students’ critical thinking skills through natural science learning website
Authors: Utami V A S , Djukri  
Published: June 2020

Abstract
This study aims to determine the improvement of students’ critical thinking skills through a natural science learning website. The subject of the pre-experimental study is 64 junior high school students of grade 7th that is divided into two classes (32 students in the class D, Grade 7th, as experiment class and 32 students in class B, Grade 7th, as a control class). This study is placed at the 4th Pakem State Junior High School – Yogyakarta. Sampling technique that is used in this study is purposive sampling. The data was collected by using pre-test and post-test. The data was analysed by using paired t-test and N-gain score to see the effectiveness of the natural science learning websites to increase the students’ critical thinking skills. The results which are showed by using the natural science learning website has a significant effect on students’ critical thinking skills with the value of significant (α) 0.00 < 0.05 while the N-gain score is 0,87 that is included in the medium category. It can be concluded that natural science learning websites can increase students’ critical thinking skills.
Global warming & climate change: integration of socio-scientific issues to enhance scientific literacy
Authors: Widiyawati Y. 
Published: June 2020

Abstract
Global warming and climate change are some of the greatest socio-scientific issues in recent decades. Many factors contribute to these issues, the footprint of human activities as well as natural phenomena. Human energy consumption in many sectors i.e food supply, livestock, industry, and transportation significantly increasing earth surface temperature average level and climate change. Various studies were carry out about global warming and climate change interdisciplinary. Integration of these socio-scientific issues into science learning as an effort to educate and enhance student environmental awareness and scientific literacy is necessary to do. Rational of this article is to studies global warming and climate change topics from integrative science context; biology (microbial activities, ruminants, and environmental impacts), chemistry (the various chemical reaction that causes greenhouse gases and global warming), and physics (temperature, heat, and global climate). This study is urgent because microbial activities that contribute into greenhouse gases releasing in ruminant enteric fermentation process haven’t included and connected yet in Indonesia’s science learning. Ruminant should be highlighted in these issues because Indonesia is an agricultural country which has enormous farmhouse area. In addition, students are expected to be able to solve problems and make the right decisions related to these issues. This article will discuss suggestion global warming and climate change topics in terms of microbial activities, ruminant and mitigation strategies to reduce GHG from livestock sector. This suggestion is expected to meet the Sustainable development goals.
Hypergeometric method for Klein-Gordon equation with q-deformed quantum mechanics on coulomb potential
Authors: Suparmi A , dan C Cari Dyah Ayu Dianawati 
Published: June 2020

Abstract
Hypergeometric method was used to obtain the solution of Klein-Gordon equation with q-deformed quantum mechanics for Coulomb potential. By introduction the new variable and parameters in the Klein-Gordon equation, then Klein-Gordon equation reduced to the second order differential equation of Hypergeometric function. From the solution of the Hypergeometric differential equation, the energy and wave function equations were obtained analytically. The energy was numerically calculated by Matlab R2013a software and the first three wave function was obtained. The result shows that the decrease of quantum deformation caused the increase of the energy eigen value, and the increase of quantum number caused the increase of the energy eigen value too.
Development of physical practicum tools to determine the refractive index through measurement of real depth and apparent depth
Authors: Jaladri Effilia Allun , Nursulistiyo Eko 
Published: June 2020

AbstractThis study aims to develop and determine the feasibility of a physics practicum tool to determine the refractive index of fluids through measurement of apparent depth and real depth. The product development method used in this study was Research and Development (R&D) with the ADDIE model. The results of this study, the refractive index of water isn = (1.3158112 ± 0.0000303)with a relative error of 1.07%, the refractive index for saltwater isn = (1.4476904±0.0000387)with relative error by 1.37%, the refractive index for sugar water isn = (1.355680±0,000145)with a relative error of 1.02%, and the refractive index for cooking oil isn = (1.4525593 ± 0.0000694)with a relative error of 1.36%. The results of the feasibility test of media experts, material experts and users for practicum tools and practicum guides were 90.69% which included in the Very Good category, 94.17% which was in the Very Good category, 90.62% which was in the Very Good category. Based on the results of these percentages, the practicum tools, and the practicum guides are declared to be suitable as learning media on Optics Geometry material, especially for the determination of the refractive index with real depth and apparent depth.
Profile of students’ critical thinking processes on the topics of Hydrostatic Pressure and Archimedes’ principle
Authors: Rosyidah N D , Kusairi S , Taufiq A , Affriyenni Y 
Published: June 2020

Abstract
In learning physics, students often have difficulty in understanding concepts. This certainly has an impact on students’ critical thinking skill. This study aims to analyze students’ critical thinking skills related to the concept of hydrostatic and Archimedes’ principle. This research was conducted using a qualitative descriptive design. The research subjects were students of class XII MIPA in Malang (N = 127). Data collection was carried out through a series of tests in the form of essay and interview questions. The indicator used to create critical thinking questions refers to the five main perspectives presented by Hughes. The results show that the majority of students have relatively low critical thinking skill. It is shown by the average score of critical thinking skill of students which only reached 36.1 from the maximum score of 90. The main cause of the low critical thinking skill of students was the presence of misconceptions experienced by students. The low critical thinking process of students are also caused by students have not yet accustomed to applying the concepts of physics in daily life.
The Phenomenon of existence Batu Angus on the eastern slopes of mount Gamalama Ternate island North Maluku
Authors: Awal Samsi , Kamur Sudarwin , Ajid Fahririn 
Published: June 2020

Abstract
This study aims to determine the process of the formation of Batu Angus and the type of Batu Angus on the East Slope of Mount Gamalama Ternate Island, North Maluku. This research is a type of qualitative research that reveals how the process of the formation of Batu Angus and the types of rocks of Batu Angus Mount Gamalama. The research data was collected through interviews, observations, and petrographic laboratory analysis. The research data were analyzed using a polarization microscope to determine the type of Batu Angus Mount Gamalama. The results showed that the process of Batu Angus formation on the eastern slope of Mount Gamalama was initiated by an effusive volcanic eruption in 1907 in the form of lava flowing down the slope which took place in the northeast part of Mount Gamalama and piled up in the Kulaba village. Based on the results of the petrographic analysis in the laboratory, it was obtained the results that Batu Angus contained Plagioclase minerals, Pyroxene, Opaque minerals, and Glass minerals, so that it can be concluded that Batu Angus is one of the Andesite Pyroxene igneous rocks.
Evaluation of the fractionation process on aviation turbine fuel production using nuclear technology
Authors: Wibisono  , Ningsih F R , Septian H , Ragaguci  
Published: June 2020

Abstract
The role of nuclear technology not only for electricity as clean energy but also for a tool to evaluate the process in the refinery unit. Fractionation columns are designed to achieve the required separation of fluid mixtures or miscible liquids efficiently. A troubleshoot was reported on aviation turbine fuel production in the refinery unit. Due to this report, an evaluation was performed at fractionator for aviation turbine fuel production to investigate suspected areas. The specification of the unit is height of 44.4 m, internal diameter ID: 4.4 m, and consists of 52 trays, three accumulators, nine platforms. The radiation is collimated and assumed by a point source meanwhile, detector is given a panoramic window. Radiation counting in every point with step 50 mm to gain quantitative data regarding process inside the column. The nuclear technology has successfully revealed the troubleshooting column by the principle: attenuation radiation. Basically, attenuation value depends on the material which penetrated by gamma-ray. Based on six orientation the experiment successfully found flooding cases, misorientation trays, and dried chimney. Overall, the analysis proof that nuclear technology is suitable to be one of non-destructive methods in industrial scale. Future study is to provide three dimensional image by combining tomography and gamma scanning technique.
Revisiting the roles of educational robotics in improving learners’ computational thinking skills and their positive behaviour
Authors: Massaty Muhammad Hassan , Budiyanto Cucuk Wawan , Tamrin AG 
Published: June 2020

Abstract
This paper investigates the relationship between the use of robotics in learning towards self-efficacy and computational thinking skills. This paper also examines whether there is a relationship between computational thinking skills and self-efficacy. This paper employed a systematic literature review method by examining forty articles drawn from ‘computational thinking’, ‘self-efficacy’ and ‘educational robotics’ keywords in the literature. The majority of research indicates that the use of robotics in learning facilitates the development of computational thinking skills as well as learners’ self-efficacy. The paper advocates that future research should examine the extent of computational thinking skills and self-efficacy influence on student behavior.
Analyzing mathematical connection skill in solving a contextual problem
Authors: Ayunani D S , Mardiyana  , Indriati D 
Published: June 2020

Abstract
Mathematical connection skill is needed by students to connect mathematics theory and contextual problem solving. As state, in NCTM that the mathematical connections skill is one of the four competencies needed to face the industrial revolution 4.0. According to NCTM, there are three mathematical connection skills, namely modeling problems, applying obtained concepts and procedures also expanding mathematics ideas. The purpose of this study was to describe the class X student’s mathematical connection skill at Boyolali High School, Central Java in doing a contextual problem in one variable linear inequality. This research was a comparative descriptive study with qualitative methods involving 15 students from 5 schools as participants. The results showed that students’ mathematical connection skill is still low. We saw this from the indicators showed that the students were unable in modeling the contextual problems correctly, students were not able in applying the obtained the concepts and procedures also getting difficulty in expanding mathematics ideas.
The effect of STEM-based (Science, Technology, Engineering, and Mathematics) learning model toward the students’ mathematical problem-solving ability in SD Muhammadiyah Condongcatur, Yogyakarta
Authors: Pasaribu K A , Suyanto W 
Published: June 2020

Abstract
This study aims to determine (1) the students’ mathematical problem-solving ability taught using STEM-based (Science, Technology, Engineering, and Mathematics) learning model, (2) students’ mathematical problem-solving ability taught using expository learning models, (3) whether there is a difference in the effect of STEM-based learning model with expository learning models in improving students’ mathematics learning achievement. This research was an experimental research design with quasi experimental design (Quasi Experimental Design). The population in this study was all grade V SD Muhammadiyah Condongcatur Yogyakarta. The sample in this study was class V-1 as an experimental class with 33 students and class V-2 as a control class with 33 students. The findings in this study indicate that the class taught using STEM-based learning model has Mean 31.9697 and the class taught using the expository model has an average value of 28.5758. The results of the hypothesis test show that Tcount> Ttable is 2.925> 1.996 with the conclusion that the mathematical problem-solving ability of students taught with STEM learning model is better than the class which is taught with expository learning models.
Analysis of students’ critical thinking skills on chapter of motion of objects and living things
Authors: Najaah L. S. , Sunarno W. , Sukarmin  
Published: June 2020

AbstractThis study aimed to analyze the ability of students to think in critically analytical and evaluative ways on chapter of motion of objects and living things. The object of the study was 280 students of 8thgrade of MTs Negeri 1 Wonogiri in the academic year 2019/2020. This study used descriptive qualitative method to describe students’ critical thinking skills. Data was collected using reasoned multiple choice test which was developed based on skills of critical thinking according to Facione’s theory. As a result, it can be concluded that the criteria of the analysis and inference ability of the students were lack. While the ability of interpretation, evaluation, explanation, and self-regulation were in the very lack criteria.
Obstacle on The Implementation of The Scientific Approach to The Curriculum 2013: a Case Study of Lesson Study in Palangka Raya City
Authors: Nasir Muhammad , Nastiti Luvia Ranggi , Yuliani Hadma 
Published: June 2020

Abstract
One of the backgrounds changing of the curriculum 2013 was in response to the low literacy of Indonesian children according to PISA and TIMSS test results. To overcome this problem, the government adopted a policy of implementing a scientific approach in schools. The purpose of this study was to explore the obstacles faced by science teachers in applying scientific approaches in schools. Data collection techniques using questionnaires, observations, and focus group discussion. The results of the research showed that (1) Lesson study can improve teacher’s pedagogical competence in applying scientific approaches, (2) The main obstacle of teachers was the lack of time in carrying out the process of scientific approach in learning, especially at the stage of conducting experiments, (3) Lack of time preparation for national and entrance examinations to higher schools. It was concluded that although lesson study was effective in increasing the ability of teachers to apply scientific approaches, but they are reluctant to apply it because they were afraid of running out of time in conducting the experiment and achieving their national final exam material targets when a scientific approach was applied.