bluuebunny/crossref_metadata_2025_split huggingface dataset:
Using four-tier diagnostic test instruments to detect physics teacher candidates’ misconceptions: Case of mechanical wave concepts
Authors: Tumanggor A M R , Supahar  , Kuswanto H , Ringo E S 
Published: January 2020

AbstractThis research purposes to detect misconceptions of physics teacher candidates in Yogyakarta on the topic of mechanical waves. This research uses descriptive analysis method. The sample consisted of 35 physics education students in Yogyakarta. Data collection used a four-tier diagnostic instrument (4WADI) developed by Caleon and Subramaniam. The descriptive analysis findings from this research stated the results of a four-tier diagnostic analysis test classifying students in five categories, including scientific conception, lack of knowledge, false positive, false negative and misconception. Based on the results, the percentage of physics education students’ misconceptions in Yogyakarta varies on each problem indicator. The biggest misconception occurred in general characteristics of waves and wave motion represented in the graph by 32.4% and by 30.0% misconceptions on the topics of wave frequency, waves source, and medium properties. In addition, student misconceptions on each sub-topic of mechanical waves are highly categorized and need specific attention to carry out remediation. This finding might be used as a reference for lecturers or teachers to consider sub-topics of mechanical waves that have a high potential for misconceptions. Therefore, lecturers and teachers can apply efficient and effective learning methods and strategies to eliminate students’ misconceptions.
Scientific literacy profile of X grade students in Gunungkidul on Biology reviewed based on gender
Authors: Nugraheni N C , Paidi  
Published: January 2020

Abstract
This study aims to determine the ability of scientific literacy of students in biology subjects that are reviewed by gender. This research is a descriptive study with survey method to find out the difference in scientific literacy scores of male and female students. The population in this study were all X grade students in Senior High School in Gunungkidul Regency. The research sample used was 351 students from six schools taken by cluster random sampling with a total sample of 229 female students and 122 students of male students. The scientific literacy test instrument was prepared based on the 2015 PISA indicators by only taking biological content. The research data were analyse with Test of U Mann Whitney which had previously been subjected to a prerequisite test. The results showed that the average score of scientific literacy ability of female students was higher with a value of 59.45 compared to the average score of male students with a value of 55.33. Based on the results of the Test of U Mann Whitney showed a significance value of 0.16 which can be concluded that there is a significant difference between the average scientific literacy scores of female students with male.
Effectivity of Guided Discovery Learning with Concept Mapping to improve conceptual understanding in endocrine system material for grade XI science class
Authors: Sari R Y , Cahyo H N 
Published: January 2020

Abstract
This research aims to examine the effectivity of Guided Discovery Learning with Concept Mapping of endocrine system material. It is a quasi-experimental study with cluster sampling design. The hypothetical population is all students of SMA Negeri 2 Ngaglik, Sleman. The research sample is 67 students of grade XI science class which is divided into two groups; 33 students as the experimental group (Guided Discovery Learning with Concept Mapping) and 34 students as the control group (using 5M strategy). The data for students’ conceptual understanding on endocrine system material was collected using multiple choice test. The result shows that the Guided Discovery Learning with Concept Mapping improves conceptual understanding of student with higher average score (83.03) than control class (72.59) on endocrine system material especially for grade XI Science with sig. 0.000 (sig.<0.005). The data analysis showed that Guided Discovery Learning with Concept Mapping is effective to improve students’ conceptual understanding on endocrine system material.
Profile analysis of data literacy capability based on NGSS junior high school students in Takalar, South Sulawesi
Authors: Rahmita  , Rosana D 
Published: January 2020

Abstract
This study aims to identify the data literacy ability of junior high school students associated with NGSS learning standards. This study uses a qualitative descriptive study to analyze the results of the test of students’ data literacy abilities in several junior high schools. The method used is a test with a sample determined by purposive sampling technique. The subjects of the study sample consisted of 74 junior high school students in class VIII 2019/2020. The research instrument is in the form of 10 essay data literacy questions. The results of the analysis of the ability of data literacy with the highest percentage of 34.93% in the indicators of decision making and the lowest percentage were in the indicators evaluating decisions of 22.83%. For the percentage of the dimensions of the NGSS, it showed a result of 24.31% in the indicators of analyzing and interpreting data and the dimension of cause and effect obtained 34.42%. The results of this study indicate that the ability of literacy based on NGSS grade VIII students in Junior High School Takalar Regency is in the low category. Thus, the data literacy ability of students in learning science needs to be developed.
Analysis of the need for science teaching materials based on environmental problems on the island of Bangka
Authors: Adawiyah R , Ichsan A F R A , Nurcahyo H 
Published: January 2020

Abstract
This study aims to determine the need for teaching materials for natural science modules based on environmental problems due to tin mining on Bangka Island. This research uses a descriptive method. The instrument used in the form of a closed questionnaire and some questions use open questionnaire filled by 10 science teachers who teach in schools close to tin mining activities on Bangka Island. The instrument consists of 3 aspects with 11 indicators. The results of the analysis of the questionnaire found an average of the aspects of learning model aspects was 90%, the module’s teaching material aspects was 76%, the need for a problem-based IPA module due to a tin mine on Bangka Island aspects was 70%. Then based on these analysis of each of these aspect and indicators it can be concluded that needed teaching materials based on environmental problems in the form of tin mining activities on Bangka Island on environmental pollution material for seventh-grade junior high school, so that it can be used in learning process.
Analysis of the ability of students’ communication skills and self-efficacy on science instruction
Authors: Ichsan A F R A , Adawiyah R , Wilujeng I 
Published: January 2020

AbstractThis study aims to determine the relationship between communication skills and students’ self-confidence based on personal self-perspective related aspects of skills, changes in educational trends, and knowledge. This study uses survey research with a questionnaire instrument in gathering data. The sample uses random sampling, which is class VII students of 32 people. The questionnaire used in the study had a Sig. <0.05 which is 0.01. Based on research data, it is known that there is a positive relationship between communication skills and students’ self-efficacy in learning science of students of SMP N 1 Banguntapan-Yogyakarta.
Analysis of Junior High School student’s critical thinking skills integrated with the local potential of eremerasa nature tourism
Authors: Suryani I , Senam  , Wilujeng I 
Published: January 2020

Abstract
This study aims to determine the critical thinking skills of junior high school students integrated with the local potential of Eremerasa nature tourism. This research used survey method with samples determined by the purposive sampling technique. The research subjects were 70 students of class VIII junior high school students. The instrument used to measure students’ critical thinking skills is 5 items of critical thinking skills test about the interaction of living things with the environment that is integrated with the local potential of Eremerasa natural tourism, the instruments have been developed by researchers and have been validated by experts. Data analysis was performed in quantitative descriptive percentages. The results of the analysis showed that students’ critical thinking skills on indicators finding problems of 38.43%, make hypotheses of 37.30%, solve problems of 36.30%, evaluation of 38.71%, and make conclusions of 34.29%, overall the average of critical thinking skills indicators of junior high school students is 37.06%. The results of this study indicate that the critical thinking skills of junior high school students about the interaction of living things with the environment are integrated with the local potential of Eremerasa nature tourism in the low category.
Development of science chess media based on Higher Order Thinking Skill (HOTS) to increase the understanding of science concept in students
Authors: Citrasukmawati A , Julianingsih D , Trisnawaty W 
Published: January 2020

Abstract
This research generally aims to develop science chess media based on Higher Order Thinking Skills that valid for students. The specific objectives of this research are (1) developing science chess media based on higher order thinking skills, (2) knowing the feasibility of developed learning media, (3) knowing student learning outcomes after participating in learning using science chess media based on Higher Order Thinking Skills, (4) determine the response of students after learning. The application of science chess in learning uses one group pretest-posttest design. The research method used is development research by following 4 phases of Plomp. There is problem, analysis, design & develop prototype, and evaluation and then continued with the application using the one group pretest-posttest design. Based on research, it can be obtained: 1) the feasibility of science chess media based HOTS in the aspects of content feasibility, presentation, language according to BSNP (National Education Standards Board), and contextual assessment are in the category of decent to use, 2) the increase of student’s understanding on scientific concepts using science chess media based HOTS is 62.5, and 3) students gave a positive response to the science chess media based HOTS.
Development Virtual Reality IPA (VR-IPA) learning media for science learning
Authors: Monita F A , Ikhsan J 
Published: January 2020

Abstract
The science laboratory facilities in schools are inadequate. Therefore, the researcher developed a science learning media by utilizing virtual reality technology in the form of application that runs on smartphone. The objectives of this study are: (1) to determine the validity of VR-IPA media; (2) to determine the practicality of VR-IPA media from the science teachers; and (3) to determine students’ responses to VR-IPA media. This media development used the ADDIE development model. The instruments used were media validation sheets, science teachers’ assessment sheets, and student response sheets. The result shows that: (1) the validity of VR-IPA media is in very good category; (2) the practicality of VR-IPA media is in very good category; and (3) the students’ responses to VR-IPA media are very good. In brief, it can be concluded that VR-IPA media is suitable for use in science learning.
How to develop students’ scientific literacy through integration of local wisdom in Yogyakarta on science learning?
Authors: Hastuti P W , Setianingsih W , Anjarsari P 
Published: January 2020

AbstractLocal wisdom in Yogyakarta is very diverse, potential as a learning sources that can be integrated in the science learning process to develop the scientific literacy, which needed in 21stcentury learning. This research is to produce learning tools based on local wisdom to enhance the students’ scientific literacy. This study used the Plomp’s Model with several phases namely 1) Analysis, 2) Design, 3) Development, 4) Evaluation and 5) Implementation. The instruments used in this research were validation questionnaire of product and instrument for measure of scientific literacy. The result showed that (1) identification local wisdom in Yogyakarta which used in science learning and accordance with topic environmental pollution was utilizing waste batik as a result of the process of making batik in Yogyakarta, (2) learning toolkit based local wisdom have been produced namely lesson plans and students’ worksheet with excellent category of both, and (3) integrating local wisdom in science learning that was develop scientific literacy in very good category. It indicates that learning tools based on local wisdom was effective to use in science learning to develop scientific literacy.
Organic acid produced by lactic acid bacteria from bekasam as food biopreservatives
Authors: Desniar  , Rusmana I , Suwanto A , Mubarik N R 
Published: January 2020

Abstract
Bekasam is one of the Indonesian fish fermented products that contain lactic acid bacteria (LAB). Previous research has obtained four LAB strains which are considered as bacteriocin producers, have antibacterial activity against pathogenic bacteria from food. In addition to a bacteriocins, LAB produce another compounds, such as organic acids. This study aimed to determine the produced organic acids and their antibacterial activity during LAB growth against of Lactobacillus monocytogenes, Staphylococcus typhimurium, Escherichia coli, Bacillus cereus and Staphylococcus aureus, to determine the organic acid contents using HPLC and to identify LAB isolates using molecular method based on 16S rDNA sequences. The four LAB strains (BP (3), BP (20), BI (3) and SK (5)) were grown in MRS broth medium, then incubated at 37 °C for 48 hours and every 4 hours incubation was tested of titratable acid total (TAT), pH, LAB growth and antibacterial activity. The result showed that the exponential phase of bacteria growth occurred at 16-20 hours incubation and at the end of the exponential phase produced the highest antibacterial activity in the four LAB strains. The highest growth, TAT and antibacterial activity produced by the SK (5) strain. The highest organic acids content were lactic acid in the SK(5) strain and acetic acid in the BI(3) strain. Identification result indicated that BI(3), BP(3), and BP(20) strains were Pediococcus pentosaceus IE 3 with similarity of 98%, 97%, and 98%, respectively. While SK(5) strain showed 93% similarity to Lactobacillus plantarum subsp. plantarum NC 8. The four LAB strains produced organic acids and had antibacterial activity, so they can be developed as food biopreservatives.
Study on stock structure of Indian mackerel (Rastrelliger kanagurta Cuvier, 1816) in Fisheries Management Area 712 of Indonesia using morphological characters with Truss Network Analysis approach
Authors: Hakim A A , Kurniavandi D F , Mashar A , Butet N A , Zairion  , Maduppa H , Wardiatno Y 
Published: January 2020

AbstractThe management of fish stocks is essential for the maintenance of a healthy and profitable fishery. One of important knowledge regarding the matter is the stock structure of the target fish, and fish morphology can be used to determine the stock structure. In fishery point of view, Indonesian waters are divided into 11 Fisheries Management Area. This study was aimed to reveal the stock structure of the Indian mackerel(Rastrelliger kanagurtaCuvier, 1816) in Fisheries Management Area (FMA) 712. The fish collection was made in three different locations, i.e. Lancang Island, Cirebon, and Madura Island. Thirty-four morphological characters were measured to determine the stock structure with Truss Network Analysis (TNA). The results showed that both of conventional method and TNA revealed two stocks of Indian mackerel in the in FMA 712. The first stock was the fish population of Lancang Island and Cirebon, and the other was the population of Madura Island. The discriminant analysis also showed a similar result. For best future sustainable fishery management in Indonesian waters, more research on stock structure of any commercial fish in each fisheries management area of Indonesia is warranted.
Kaizen implementation in seaweed aquaculture (Gracilaria sp.) in Karawang, West Java: A productivity improvement case study
Authors: Hasanah F A , Nurhudah M , Mulyono M , Dillon M 
Published: January 2020

Abstract
Seaweed is an important and high economy value commodity. There are various methods to increase the quality and productivity. The aim of the study was to improve the quality, quantity and production of seaweed (Gracilaria sp.) by using Kaizen approach. There were intervention ways; those were long line method, grouping method and charcoal pocket application. This study was conducted for 3 months from March 25, 2018 to May 25, 2018 (one cultivation cycle) in Tambaksari village, Karawang, West Java. Some parameters were observed during the study including daily growth rate (weight and length), water quality parameters (pH, temperature, salinity, dissolved oxygen, nitrate, high water), and productivity. The measurement of weight and length of thallus were conducted once a week, while for water quality parameters were once every three days. The long line method in deeper part of pond had higher profit (7.7% or IDR 12,451,200) than that of in shallower part of pond (IDR 11,195,200). Grouping method resulted better quality of harvested seaweed and led to get higher profit (17% or IDR 4,400,665) than that of without intervention (IDR 1,681,165). The charcoal pocket application influenced to the growth rate of non pocket treatment was about 416,46 g/week than that of with pocket (233.11 g/week) and with charcoal pocket treatment (304.33 g/week). So that the most effective method to be applied was the longline method in deep and grouping method gave more quality impact of harvest result.
An ecosystem services perspective for the economic value of seafood production supported by seagrass ecosystems: An exercise in Derawan Island, Indonesia
Authors: Kurniawan F , Arkham M N , Rustam A , Rahayu Y P , Adi N S , Adrianto L , Damar A 
Published: January 2020

Abstract
Seagrass meadows provide provisioning services that play a vital role in food security and human wellbeing, especially on the small island. However, the utilisation value is uncalculated as support for seafood production and livelihoods for the community, because they are considered as alternative uses, so that seagrass ecosystem services are underestimated and undervalued. This paper aims to show the economic value provided by seagrass ecosystem services in providing seafood, both as a primary or secondary source. Through field survey and effect on production (EOP) analysis shows that capture fisheries and other marine biota collecting, both crustacean and mollusc species associated with the seagrass ecosystem are utilised directly by coastal communities in Derawan Island, Indonesia. Estimates of the economic value of fish and marine biota employed in the seagrass ecosystem area are US$ US$ 13,488.80 and US$ 35,744.69 per hectare per year, respectively, or a total of US$ 49,233.49 per hectare per year. This value demonstrates the potential importance of seagrass ecosystems. Unfortunately, these benefit values have not been fully understood by the communities, so that many people ignore the function of seagrass ecosystem services as provisioning services, although in the scarcity the utilisation of the seagrass ecosystem is quite intensive. Hence, the precautionary principle and suggesting conservation actions in a participatory manner is challenging to implement.
The Responsible Seafood Tool (RESET): Empowering businesses in Asia to source seafood more responsibly
Authors: Lee M K K 
Published: January 2020

Abstract
The current situation observed in the seafood industry demonstrates that responsible and certified seafood produced in Asia as well as other developing regions is often exported out to Western markets such as Europe and the US, due to a higher demand and higher willingness to pay. This renders responsible and certified seafood to be shipped out of Asia and results in a market where responsible and certified seafood is systematically underrepresented. Hence, the lack of supply of responsible seafood from regional sources has hindered companies’ efforts to source responsibly, despite a commitment to do so. With Asia’s increasing disposable income and growing awareness by consumers for responsible and certified seafood, greater opportunities can be leveraged upon by World Wide Fund for Nature (WWF) to increase the supply and demand of responsible seafood in the region. The Responsible Seafood Tool (RESET) is developed as WWF believes that there is opportunity for change in empowering businesses in Asia to source more responsibly, particularly for a local favourite - seafood. Responsible seafood sourcing helps to reduce negative consequences to the environment, in the form of biodiversity loss, seascape degradation, and resource depletion, as well as to reduce lost livelihoods displaced by depleted fishstock or polluted landscapes and seascapes. The tool seeks to lower the barriers for businesses to source for responsible seafood, and to directly mobilize improved management and performance of fisheries and aquaculture in Asia. In a nutshell, RESET aims to provide easy access to the supply of responsible seafood for interested buyers, while also supporting Asian aquaculture and fisheries by providing business incentives for certification. Seafood buyers enjoy the access of a variety of responsible seafood from Asia, at the same time, they enable WWF to propel responsible seafood producers along their journey to achieve Aqualculture Stewardship Council (ASC) or Marine Stewardship Council (MSC) certification.