bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of students’ understanding of mathematical concept with STAD type cooperative learning through student worksheets
Authors: Nasution M L , Hafizah N 
Published: May 2020

Abstract
The objectives of hierarchical learning in hierarchical learning start from understanding mathematical concepts to a higher level. Understanding mathematical concepts is the initial foundation for students to be able to achieve other mathematical goals. This shows that the ability to understand mathematical concepts is a basic ability that students must have in learning mathematics. One mathematical learning model that can help understanding mathematical concepts is to apply the STAD type cooperative learning model. The STAD cooperative learning model is a model that is able to improve students ‘understanding of mathematical concepts because each stage of the learning model is able to support in improving students’ understanding of mathematical concepts. To find out and describe the development of students’ understanding of mathematical concepts with the STAD type cooperative learning model through student worksheets, a study was conducted in class VIII 3 of SMP Negeri 18 Padang. The quiz was conducted 6 quizzes and the results of the study showed that there had been an increase in understanding of students’ mathematical concepts during the application of the STAD type cooperative learning model.
The preliminary research phases of learning devices based guided discovery development to improve the students’ problem solving ability of grade vii MTS/SMP
Authors: Hakim R P , Asmar A 
Published: May 2020

Abstract
This research aims to develop a learning devices based on guided discovery methods that have valid, practical, and effective characteristics in order to improve the problem solving ability of grade VII SMP/MTs. The learning devices developed include lesson plan and student worksheet. The subject of this research was students of grade VII MTsN 1 Kerinci. The type of this research is development research using a PLOMP model that has three phases, namely, preliminary research, development or prototyping and assessment. The preliminary phase of research consists of needs analysis, curriculum analysis, student analysis, and concept analysis. Based on the results of preliminary research obtained the information that student problem-solving ability are not optimal, one of the factors that cause this is the unavailability of learning devices that can facilitate Students to improve their problem solving abilities. In the development or prototyping phase of the activities conducted is designing products such as lesson plan and student based Discovery guided, which then conducted a formative evaluation to determine the validity and practicality of the product. At the last stage, the assessment phase is conducted assessment of practicality test and effectiveness test.
Stability analysis of prey predator model Holling type II with infected prey
Authors: Latipah K , Putri A R , Syafwan M 
Published: May 2020

Abstract
We describe a prey-predator model with infected prey. The model using Holling response function of type II is a nonlinear system of ordinary differential equations consisting of two distinct population. Critical points of the model was determined and stability of the system was analyzed by eigenvalues of Jacobian matrix. The behaviour of the dynamical system was analyzed through this stability. Furthermore, threshold number determining the system is free of disease or infected was computed. Numerical solutions are presented on phase plane to confirm the analytical solutions.
Analytical study and numerical simulation of diffusive prey predator model with Holling type II functional response
Authors: Satria A , Putri A R , Syafwan M 
Published: May 2020

Abstract
A prey predator model which consists of two distinct population is discussed. The model used Holling response function of type II without limiting on prey population growth. Equilibrium points of the model was determined and stability of the model was analyzed by phase plane analysis. Furthermore, the model is reformulated by adding a diffusive terms to understand the spatial effect of the dynamical system behaviour. Solutions of the diffusive model were numerically illustrated with Neumann boundary conditions. Numerical simulations are presented to confirm the analytical results.
The existence and stability of onsite solitons in a driven discrete nonlinear nonlocal Schrödinger equation
Authors: Putra G , Syafwan M , Haripamyu H 
Published: May 2020

Abstract
In this paper, we examine numerically the existence and stability of onsite solitons in a driven discrete nonlinear nonlocal Schrödinger equation. The equation interpolates cubic and Ablowitz-Ladik nonlocal equations. We obtain that the solitons are always stable for small interpolation parameter. We also obtain that the driving parametric can destabilize the soliton solution.
Hierarchical Bayesian Modelling in Small Area for Estimating Binary Data
Authors: Sari A D , Yanuar F 
Published: May 2020

Abstract
Indonesian’s data are obtained from BPS from census, but census are designed for large area. Now, local goverments need to have reliable and detailed information in small area. Direct estimation are unreliable to be applied in small area because produced high mean square error (MSE). To overcome this problem, we use the indirect estimation Small Area Estimation Hierarchical Bayesian (SAE HB) with Logit Normal as the model. From this study founded that HB produced a smaller MSE than direct estimation
Teachers’ perception of media tools in mathematics learning at senior high school
Authors: Mukhni M , Mirna M , Khairani K 
Published: May 2020

Abstract
Media tools are always been believed can increase students’ learning outcomes. This study is to describe mathematics teachers’ perspective of media tools in mathematics learning. Instrument is a questionnaire about media tools in Likert scale. Questionnaire was delivered to 35 mathematics teachers in Padang Pariaman. The result shows that mathematics teachers have good perspective of media tools in mathematics learning at senor high school but the frequency of using it is still low.
Identification of Spatial Autocorrelation in the Poverty Level in West Pasaman Regency with Moran Index
Authors: Sari F M , Frananda H , Fransiska S 
Published: May 2020

Abstract
West Pasaman Regency is one of the 50 largest disadvantaged regions in Indonesia. One indicator of disadvantaged areas is there are still many poor people in the area. The level of poverty in an area is estimated to be influenced by the poverty of the surrounding area. Relationships between these regions can be known by calculating spatial autocorrelation. This research aims to determine spatial autocorrelation in the poverty level in West Pasaman using the MoranIndex. The results of this study indicate thatthe poverty level in West Pasamanhave positive spatial autocorrelation, but the correlation is weak because the Moran Index value is close to 0, which is 0.0765.
Hand’s on Activity to Increase Student’s Understanding about Place Value at Elementary School
Authors: Dwina F , Sriningsih R , Rusyda N A 
Published: May 2020

Abstract
The purpose of this research was to increase student’s understanding about place value at elementary school. This research was conducted at second grade of an elementary public school no 13 in Kecamatan Padang Barat. There were three phases of the development: preliminary research, development/prototype phase, and assessment phase. The model of development was adapted from Plomp model. This research was focused until development/prototyping and implementation. The first step was discuss with teacher to get some information about the problems in mathematics instruction at the second grade. The teacher still have the difficulty how to show the real process in addition and subtraction operation at natural number. The second step was preparing the Base Ten Blocks and creating the booklet about how to use it. In this prototyping phase the booklet was corrected by teacher and expert. This phase had micro-cycle until the teacher and the students find the booklet useful. In first prototype, validation was conducted by self-evaluation and expert review. After the revision of the first prototype, the second prototype was created, and then it was used to know about its practicality by implementation in small group evaluation and student in class.
The influence of realistic mathematics education (RME) approach with the TANDUR on understanding the concepts and solving mathematical problems on grade 8 in smp negeri 1 pantai cermin
Authors: Yuniati B Y , Armiati A , Musdi E 
Published: May 2020

Abstract
The aims from this study observe at the effect of using the RME approach with the TANDUR design on students’ ability to understand concepts and solve problems in Mathematics in SMP Negeri 1 Pantai Cermin both to the students who had high previous knowledge and those who had low previous knowledge. This was a quasi-experimental research. Samples are choose using randomized sample. Data are analysed using t-test, Mann Whitney test and two Ways Anova using MINITAB software. The result of data analysis showed that: (1) the application of RME with TANDUR can improve students’ MPS skills and still need to improve their ability to understand concepts, (4) there was no interaction between learning approaches and previous knowledge toward the eighth grade students.
Validity Of Mathematical Learning Material Based On Model Eliciting Activities (MEAS) Approach To Improve Mathematical Creative Thinking Skill Of Students
Authors: Aziz S A , Irwan I 
Published: May 2020

Abstract
This paper discusses the validity of mathematical learning material based on MEAS approach in improving mathematical creative thinking skills of high school students. This learning material was validated by experts from mathematics, language and educational technology backgrounds. The conclusion that the learning material was categorized valid and can improve students’ creative thinking skills.
Alternative Constructs of the Lemniscate of Bernoulli
Authors: Mashadi M , Deswita L , Suprika G 
Published: May 2020

Abstract
Until now there are at least three alternative methods of constructing lemniscate of Bernoulli. In this paper six alternative methods will be given to construct Lemniscate of Bernoulli in a simple way. Furthermore, at the end of the session will be given how to construct the incircle of Lemniscate of Bernoulli.
Increasing Student Mathematical Critical Thinking Ability Through the Development of Geometry Instructional Device Based on Van Hiele’s Theory
Authors: Musdi E , Permana D , Wiska S , Rusyda N A 
Published: May 2020

Abstract
Objective of this study is to increase students’ critical thinking skills through geometry instructional device based on Van Hiele’s theory. Instructional devices developed include lesson plans and student worksheet based on Van Hiele’s theory. The stages of instructional are integrated with the stages of learning Van Hiele’s theory which consists of five stages, namely information, direction orientation, explication, free orientation, and integration. The development model used is adapted from the Plomp model which consists of three phases, namely the initial investigation phase, the prototype development phase, and the assessment phase. The subjects of this study were grade VIII students of SMP 13 Padang. The results of the research obtained showed an increase in indicators of mathematical critical thinking abilities of students using geometry instructional devices based on Van Hiele’s theory.
The Effectiveness of AR-Geometry Interactive Book in Increasing Students’ Mathematical Reasoning Skill
Authors: Suherman S , Zafirah A , Agusti FA , Usman R 
Published: May 2020

AbstractMathematics is a subject that requires the students to gain reasoning abilities. Reasoning ability can be found when students learn geometry material. However, several studies concluded that geometry material is one of the difficult material for students. Difficulty of geometry is caused by the majority of mathematics teachers still use conventional media and teaching instruments in learning, especially in term of constructing the space. This is implemented on the AR-Geometry Interactive Book. This book is designed by using the principle of interactive 3D (three-dimensional) appearance by utilizing Augmented Reality (AR) based technology. This research uses a combination of qualitative and quantitative methods. The first qualitative data was taken by depth interviews to 4 informants selected with certain conditions using purposive sampling technique. The first phase of data collection aims to explore the information related to student interest in using the AR-Geometry Interactive Book. Furthermore, the second stage data was taken using a questionnaire to 21students in class VIII of SMPN 4 Ujung Batu. The second stage of data collection aims to support the results of the first phase of the research, all data in the second stage were then analyzed descriptively using quantitative analysis tools. Overall, the results of the second analysis indicate that the AR Geometry Book is appropriate to use in learning. To see students’ mathematical reasoning abilities, tests were conducted by testing 3 essay questions. The results of the study prove that the use of AR-Geometry Interactive can improve students’ mathematical reasoning abilities.
Development of mathematical based constructivism learning tool to improve students’ mathematical reasoning abilities
Authors: Sari M I P , Musdi E 
Published: May 2020

AbstractThe research that has been overshadowed in which teaching materials used by students are not all of the material in accordance with the KD. So that the material presented elusive student and as a result students awaiting an explanation by the teacher. Therefore, to create students who are active in learning, students can build their own thoughts or develop his own knowledge is to improve students’ reasoning skills learning concept. To improve reasoning skills students need learning tools that make the students can learn and be independent in constructing ideas. And with the development of mathematical learning prangkat based constructivist approach, students can become more active, independent and able to build the knowledge gained.
Carbon stored in tree biomass of Cigerendeng Research Forest, Ciamis, West Java
Authors: Indrajaya Y , Mulyana S 
Published: May 2020

Abstract
Trees naturally may contribute to climate change mitigation through photosynthesis process that absorbs carbon dioxide in the atmosphere and stored in their biomass. The amount of carbon stored in tree biomass depends on the size of tree, species, and population per area. This study aims to analyse the amount of carbon stored in Cigerendeng Research Forest (CRF), West Java that is managed by Forestry Research and Development Agency (FORDA). This forest is dominated by mahogany and dipterocarp species originally having been planted in Sumatera and Kalimantan starting from the 1930s. Species-specific allometric and general allometric are utilised to estimate the weight of the above ground biomass. Below ground biomass is estimated by allometric equation of Cairns et al (1997). The results of this study show that carbon stored in tree biomass of Cigerendeng Research Forest (CRF) in 2009 and 2015 were 156 and 199 ton per ha respectively, with relatively dominated by old trees. The growth of trees in the CRF area could store 43 ton per ha in 6 years (from 2009 to 2015). The CRF manager utilizes the CRF by selling its environmental services (i.e. amenity and carbon), instead of harvesting.
Adat community and climate change adaptation measures: case of Kasepuhan Karang
Authors: Sylviani  , Surati  , Sakuntaladewi N , Sumirat B K 
Published: May 2020

Abstract
Adat community (AC) needs for being adaptive to survive against the negative impacts of climate change and unexpected extreme conditions. They are very dependent on forest resources and practices of local wisdom to survive from various climate conditions. This paper aims to analyze the adaptation strategy of Kasepuhan Karang AC, Lebak District, Banten Province, towards climate change. Data are analyzed using descriptive analysis. The results show that the AC has no knowledge of climate change. However, the local wisdom reflected in their customary rules has until recently been able to make the AC to maintain their customary forest cover and manage its sustainably. They have never experienced a shortage of food and water, and are free from the huge flood disasters that hit several areas around it. This customary rule has proven that they are able to remain survived. But the increase of population and the development process has formed its own challenges. Their adaptation efforts are intended to improve the biophysical environment, expand business opportunities, and seeking breakthroughs in the use of their inherited land. Local wisdom is able to make AC survived, to anticipate population development, to adapt to climatic conditions and extreme conditions, and to make AC not being exposed towards climate change.
Strengthening Indonesian production forest governance
Authors: Suryanto  , Sayektiningsih T 
Published: May 2020

Abstract
The Indonesian Corruption Eradication Commission indicates some leakages in timber governance as a result of poor forest governance. This study aimes to provide some insights in strengthening Indonesian production forest governance by using approaches of effective land-use (ELu), timber production (TP) and Non-tax state revenue (NtSR). Multi-stage analysis are deployed by using main data of forest cover and TP in 2017. Results show that there are 20.84Mha of active forest concessions which is only 11.06Mha administered with ELu, so it is 75.45% of 45.05Mha potential production forests which are un-utilized. There are three-strategic steps proposed, namely: realistic, optimistic and optimistic-realistic. Realistic strategy is proposed to fix TP governance and improve accountability. This step would improve TP by 79.54M m3/year and add NtSR by IDR 2.21trillion/year. Optimistic strategy is proposed to encourage each forest concession implements multi system-sylviculture, so that it would add ELu by 9.48Mha. Optimistic-realistic strategy is implemented by encouraging investment in the 45.05Mha of potential extents of production forest. These all steps would increase ELu to 32.95Mha; TP to 342.54M m3/year and NtSR to IDR 10.41 trillion/year. It would strengthen the National Forestry Planning which initially targeted TP of 376.5M m3/year by2030; however, it is currently stagnant on 44.29M m3/year since the plan was set in 2011.
Study of social and economic aspects of renewable energy policies
Authors: Effendi R , Maryani R , Justianto A 
Published: May 2020

Abstract
Energy from wood, as renewable energy, sourced from forest biomass is urgent to be developed because its availability is decreasing.The study focused on the socio-economic and policy aspects of biomass energyso that the development of plantation forests is more optimal to support energy security.The study was conducted in Jakarta and West Java provinces especially in Bandung in 2017 to provide information on social economic situationin developing policy for renewable energy sourced from forest biomass. The two locations are selected because they are the national and the provincial capitals that are rich with information and data related to existing regulations/policies for the development of renewable energy. Economic and financial analysis is conducted to see the feasibility of developing a forest biomass energy business. The results show that the potential for renewable energy from forest biomass is very largeinthe forms of feedstocks. Forest areas in Indonesia are very strategic for providing biomass-based energy resources. Energy Plantation Forest (HTE) is a potential and reliable energy source to be developed as a source of sustainable raw materials. This can accelerate the commitment of the MOEF in achieving renewable energi based on forest biomass that will contribute 5% to the national energy mix in 2025. It is recommended to: 1) provide policy support in the common vision of developing a renewable energy industry from forest biomass, 2) formulate policies on upstream-downstream HTE development policies, and 3) increase the competitiveness of HTE wood species for the utilization of forest biomass energy.
Out of fire disaster: dynamics of livelihood strategies of rural community on peatland use and management
Authors: Winarno B , Rohadi D , Herawati T , Rahmat M , Suwarno E 
Published: May 2020

Abstract
Rural community in peatland is less concerned actor during the recurrent fire disaster. This disaster has already diminished the source of livelihoods. There is limited information about the dynamics of the livelihoods related to the use of fire in peatland. This paper examines the dynamics of rural livelihoods and the adaptation livelihoods strategies in degraded peatland. Data are collected by field survey, in-depth interview, focus group discussion in three villages at Riau Province and they are analyzed descriptively. Peatland is the only remaining important resource for the rural people after fire disaster. They will select prospective commodities based on their capabilities and access to market. Rural community are more intensive in using the resource of peatland for their livelihoods with the growing interest to several commodities. Recent community livelihoods depend on some certain commodities (palm oil, areca nut, rubber) and tend to conduct expansive and monoculture land use strategy rather than polyculture strategy. Diversification livelihood with adaptive and valuable commodities through trainings, continuous coaching and building business.
Challenges of mangrove management in supporting climate change mitigation policy in East Kalimantan
Authors: Salminah M , Alviya I , Ekawati S , Salaka F , Kartikasari G , Subarudi  , Bachri A 
Published: May 2020

Abstract
East Kalimantan Government has set up mangrove programs such as rehabilitation, silvofishery, social forestry and land reform to support its commitment in reducing emission from deforestation and forest degradation. This paper investigates potential challenges in implementation of the programs by exploring local community’s understanding on the role of mangroves in climate change and their acceptance to the mangrove programs. The results are discussed in the context of theories related to community-based natural resources management and property rights. Survey using questionnaires is followed by in-depth interview and it shows that most respondents understand the importance of mangroves in climate change mitigation but are not well informed about the programs. They are also objected to the land reform and social forestry programs because the programs do not provide comparable compensation. This finding is congruent with the theories of property rights and co-management of natural resources. To increase community’s acceptance, legalization of occupied mangrove land, therefore, needs to be followed by other interventions such as awareness raising programs, financial support and market control as extra benefits for the local communities. The central and local governments also need to intensively communicate with the local communities to arrange technical, administrative and political mechanisms in collaborative mangrove management.