Indonesia Conference Directory

Corresponding Author
Kadek Sera Harlistya Udayani

Institutions
UPI

Abstract
Teaching materials based on wisdom and local potential are needed in environmental education in order to produce learning resources that are appropriate to students cultural, geographical and social environment. The purpose of this study was to obtain a picture of the impact or effect of the use of teaching materials based on local wisdom of Tumpek Wariga on achieving students problem solving abilities. The method used in this study is a quasi experiment with a research design that is non equivalent pretest-posttest design. The study was conducted at one of the high schools in Denpasar. The research sample consisted of 36 experimental class students who used teaching materials based on local wisdom Tumpek Wariga and 36 control class students who used national teaching materials. Teaching material based on local wisdom Tumpek Wariga has previously been validated by reviewers with results worth to using. Data about students problem solving abilities are measured by essay questions arranged according to indicators of problem solving. The research data did not meet the prerequisite test then analyzed through the nonparametric ¬Mann-whitney test. The analysis showed that there were significant differences in posttest results between the control and experimental classes with a significance level of 0.00. This shows that teaching materials based on local wisdom Tumpek Wariga can improve students problem solving abilities.

Keywords
Teaching material, local wisdom, problem solving ability

Topic
Biology Education

Link: https://ifory.id/abstract/YqvwMFuAZmgG

Corresponding Author
Yunia Bani Pratiwi

Institutions
a) Program Studi Pendidikan Matematika, Sekolah Pascasarjana Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*yuniabanipratiwi[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This research aims to analyze students‘ answer on solving rational and irrational inequalities. A qualitative method was used in this research. Data were collected from 42 students of 10th grade through the test consisted of 10 problems. For further identification, an interview was also conducted. The result showed that there were two groups of students‘ solution. The first one are students who used number line and the other one are students who solve directly without number line. In this article explained that there are six categories of student errors i.e. solving rational inequality like the equation, looking for zero maker in numerators and denominators of rational inequality with the inequalities following the question, errors arose from problems with factorisation, wrong in applying the property of distribution, ignoring irrational inequality rules, and misinterpreting the sign of inequality into a number line.

Keywords
Student-s answers; Errors; Number Line; High School Students; Rational and Irrational Inequalities

Topic
Mathematics Education

Link: https://ifory.id/abstract/6aHftYpGdJ4F

Corresponding Author
Cicyn Riantoni

Institutions
Physics Education Department, Faculty of Education, Universitas Jambi, Jl Lintas Jambi-Muara Bulian Km 15, Muaro Jambi 36361, Jambi, Indonesia
cicynriantoni12[at]gmail.com

Abstract
In agreement with conceptual understanding, identifying of problem solving skill is an important topic in physics. The purpose of this research was to explore students problem-solving skills based on expert and novice category. The research used a mixed method approach with an explanatory model with 34 prospective physics teacher at the Jambi University, Indonesia. The data was obtained by using open-ended questions. Data were collected using tests and interviews. Data analysis was done by using paired t-test and rubric for physics problem-solving skills. Problem-solving skills were classified into expert and novice. The research showed that most students have problem solving skill by novice categories. The cause is the weak application of concepts in the problem solving process. The research conclude application of concept in the process of problem solving not well understood by most student be the reason most student have categories novice ability in problem solving.

Keywords
problem solving skills; expert; novice

Topic
Physics Education

Link: https://ifory.id/abstract/cBrPumTgzYNM

Corresponding Author
Yaya Wihardi

Institutions
Universitas Pendidikan Indonesia
University of Alabama at Birmingham

Abstract
Facial action point detection is a very important task in computer vision due to various application such as in facial expression recognition, facial motion capture, and another human face analysis. This research aimed to propose a deep learning approach to identify and localize facial action points in sequences of images by using convolutional neural network. The result provide an evidence that the model can detect the points with 87% of accuracy.

Keywords
Facial Action Point, CNN, Deep Learning

Topic
Computer Science

Link: https://ifory.id/abstract/bBPm8rhytnAD

Corresponding Author
Yaya Wihardi

Institutions
Universitas Pendidikan Indonesia

Abstract
Facial expression recognition is the process of identifying the expression that is displayed by a person. It can be used to evaluate the mood of students during a class so that can help teachers improve the learning goal achievement. However, the recognition process in real environments such as in classrooms is still a challenging problem due to different expressions and illumination under arbitrary poses. In this paper we present a convolutional neural network based method that combining with gray level coocurence matrix. The result show that the proposed method can recognize three category of student facial expressions that represent good, bad, and neutral mood.

Keywords
Facial Expression, CNN, GLCM, Mood Detection

Topic
Computer Science

Link: https://ifory.id/abstract/EqhYnZgAVG29

Corresponding Author
Winny Liliawati

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to examine the feasibility of web-based global warming teaching materials that accommodate multiple intelligences for high school students. This article will present the characteristics and results of validation from web-based teaching materials that accommodate multiple intelligences. The research method uses design based research with 4 stages, namely identification and analysis of problems, designing solutions, repetitive cycles, and reflection. The instrument used for the feasibility test is a web-based teaching material evaluation sheet that accommodates multiple intelligences consisting of assessment sheets for aspects of content, media, and orientation of multiple intelligences. Validators were 12 experts consisting of 5 expert lecturers on content and orientation, and 7 lecturers of media experts. The feasibility test was obtained using the Content Validity Ratio (CVR) equation and categorized. The results obtained CVR scores for the aspect of content 0.86 with a very appropriate category, the aspect of media 0.69 with a very appropriate category, the aspect of multiple intelligence 0.68 with very appropriate category. The conclusion is that web-based teaching materials with multiple intelligences oriented are very feasible to use.

Keywords
Web-based teaching materials, multiple intelligences, global warming.

Topic
Physics Education

Link: https://ifory.id/abstract/FKXEQwJz3gCt

Corresponding Author
Sunu Kuntjoro

Institutions
UNESA

Abstract
Swiftlet bird is a type of bird that produces a product in the form of a nest made from saliva. The reduced level of endurance of swiftlet birds was due to suboptimal feeding. The aim of this study was to determine the morphometric differences in swiftlets with different feed conditions of the ant species (Oecophyla smaragdina) to the weight gain, length and length of the tail and wings of the swiftlet bird (Aerodramus fuchipaghus) and to find the most optimal feed conditions of the ant species (Oecophyla smaragdina) for the growth of swiftlet birds (Aerodramus fuchipaghus). This type of research was experimental in the Swiftlet bird Sidayu home, Gresik, East Java. The data obtained were then analyzed descriptively. The results obtained morphometric differences in the administration of different types of ant. Furthermore, the optimal growth of swiftlet was in ant species in the form of white ants with an average growth of 11.18 gr (weight), 6.32 cm (wing length), 2.88 cm (tail length) and 7.14 cm ( body length).

Keywords
swiftlet bird (Aerodramus fuchipaghus), ant (Oecophyla smaragdina)

Topic
Biology

Link: https://ifory.id/abstract/em8FtpA6BHPv

Corresponding Author
Bertha Yonata

Institutions
Universitas Negeri Surabaya

Abstract
First year undergraduate chemistry education study program students come from high schools in various regions in East Java. In this study, students conceptions of the concept of atomic and periodic system elements were obtained with a three-tier test instrument. Students choose one of the 5 answer choices, choose one of the 5 reasons provided, and determine the level of confidence in answering the question. As many as 31 Chemistry education students filled 3 questions related to the concept of atomic concepts and the periodic system of elements. The data obtained shows that there are still students who experience misconceptions and ignorance of the concept of the atomic concept and the periodic system of elements.

Keywords
atomic concept, concept of periodic system elements, three tier test

Topic
Chemistry Education

Link: https://ifory.id/abstract/6gME4F9BxAH7

Corresponding Author
Siti Saadah Mulyani

Institutions
a) Departemen Pendidikan IPA, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*) sitisaadahmulyani[at]gmail.com
b) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
c) Departemen Pendidikan Biologi, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Science is not only about concepts have been learning but also about moral values that very close with everyday life. Moral values on science learning should have can be applied in life. It will help the student for developing their good character. Character education is necessary to produce good generation. Character education can be integrated on science learning through teaching materials will be given. Teaching materials development can be done by using Four Steps Teaching Material Development (4S TMD) that consist of four stages, namely Selection, Structuring, Characterization, and Didactic Reduction. This article will describe how to develop integrated science teaching materials by using Four Steps Teaching Material Development (4S TMD). 4S TMD method is used because it has a didactic reduction stage where the level of difficulty of teaching materials is reduced according to the intellectual level and cognitive development of students. Besides, this teaching materials be contained moral values was integrated. Therefore, it is expected that students can develop their good character through teaching materials developed.

Keywords
teaching materials, 4S TMD, integrated science, character education

Topic
Integrated Science Education

Link: https://ifory.id/abstract/zf9bAG2tYCWw

Corresponding Author
Wardani Rahayu

Institutions
(1*.2) State University of Jakarta, JL. Rawamangun Muka Jakarta Timur 13220 Indonesia

Abstract
The purpose of this study is to find out how the dimensions, aspects, and items of classroom culture instruments. This study was adopted from the interpretive-constructivist paradigm using the quality methodology. Research subjects were 9 experts who were randomly. Instrument modification from WIHIC is with dimensions of teacher support, involvement, investigation, authentic task orientation, cooperation, equity, access, interaction, transformation, and using technology. The results showed that the assessors provided advice and input in examining the appropriateness of the dimensions, items and aspects being assessed. Systematically the preparation of PPG class culture instruments produced 54 items that were declared valid based on expert agreement. Existing statement items met various measurement criteria that can be used to measure the class culture of PPG students in Indonesia. The dimension that needed to be corrected was the authentic task orientation indicator. Almost all experts provided improvement in aspects of language.

Keywords
class culture, expert validity, WIHIC

Topic
Mathematics Education

Link: https://ifory.id/abstract/KXvkzYVUr2MA

Corresponding Author
Waslaluddin Waslaluddin

Institutions
Universitas Pendidikan Indonesia

Abstract
A healthy and clean environment is essential for human survival. Garbage is one of the problems in creating a clean and healthy environment. This research develops a Garbage Bank in Elementary Schools for clean living and environment-friendly education. The Garbage Bank in elementary schools manages waste to be of economic value. The object of this study was elementary school students in the Rancabolang Village, Gedebage Bandung. Clean life education and environmental love for elementary school students by applying the 3-R principles, namely: Reducing, Reusing and Recycling Waste. The development of the Garbage Bank in Elementary Schools is made based on the Waterfall method, object-oriented modeling, web-based, and PHP programming language. The stages of this research include the study of literature, needs analysis, system design, implementation, testing, analysis, and conclusions. The application of the Garbage Bank software in elementary schools can improve clean living education and environmental love for elementary school children in Rancabolang.

Keywords
Clean Life, Garbage Bank, Software, Object Oriented

Topic
Computer Science

Link: https://ifory.id/abstract/dMJQm9pjwfzH

Corresponding Author
Andi Mu-nisa

Institutions
a) Departement od Biology, Universitas Negeri Makassar, Makassar,
b) Faculty of pharmacy, Universitas Muslim Indonesia, Makassar,

Abstract
The present investigation was carried out to characterize the bioactive compounds present in extract of Thelenota ananas using Gas Chromatography-Mass Spectrum (GC-MS). The results of the GC-MS analysis provide different peaks determining the presence of 10 phytochemical compounds with different therapeutic activities. The major hexadecanoic acid, ethyl ester (55.47), [1,1&

Keywords
GC-MS, Thelenota ananas, sea cucumber, Selayar Island

Topic
Biology

Link: https://ifory.id/abstract/LcF76dWRbhVJ

Corresponding Author
Lilit Rusyati

Institutions
UPI

Abstract
The needs of developing competent human resources on 21st Century Skills nowadays are become an issue. One of the skills is creative thinking skill. In this research, STEM-based E-Module can be an option. Investigate the effect of implementing STEM-based E-Module, investigate the differences between the female and male groupon on their creative thinking, and determine students- impression on STEM-based E-Module are the objectives that have to be reached. The pre-experiment method with one group pre-test and post test was conducted through a research subject of 8th-grade students at a private school in Bandung that taken from a purposive sampling. Creative thinking was determined by a test of Verbal Torrance Test of Creative Thinking (TTCT) in Oxygen for Life topic, while students- impression obtained by a questionnaire. The result of this research stated that there is a significant difference between post-test of Verbal TTCT and minimum criteria of mastery learning that has been decided as standard, which is 65. The analysis was using t-paired test using SPSS. In differentiating between female and male group on their creative thinking, independent t-test was conducted. But there is no significant differences between female group and male group on their creative thinking.

Keywords
STEM-based e-module, students- creative thinking, gender, oxygen for life

Topic
Integrated Science Education

Link: https://ifory.id/abstract/fzYVPhgLXwmZ

Corresponding Author
Hilda Nurmuslimah

Institutions
Islamic State University of Sunan Gunung Djati Bandung

Abstract
Longitudinal regression is a statistical method used to analyze the relationship between one or more independent variables and dependent variables on longitudinal data. Longitudinal data is the result of observation of a study in several different periods. Collecting data periodically causes the correlation in each object observation so that longitudinal data could not be analyzed with the usual regression methods. One of method used for regression analysis of correlated data is Generalized Estimating Equation (GEE). GEE method provides many types of correlation structures that are independent, exchangeable, AR(1) and unstructured. This research has intention to determine the best longitudinal regression models on study case of Human Development Index (HDI) in 2010-2014 used GEE method and four different correlation structures. The best model of it will be determined by using Quasi-likelihood Information Criterion (QIC) test. The result of analysis by seeing the smallest value of QIC is AR (1).

Keywords
Longitudinal Regression,Generalized Estimating Equation,Correlation,Human Development Index

Topic
Mathematics

Link: https://ifory.id/abstract/rUjETDyPYvqG

Corresponding Author
Ilham Hidayat Kurniawan

Institutions
Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Indonesia

Observatorium Bosscha, Institut Teknologi Bandung, Indonesia

Abstract
A GOTO telescope motion control system in right ascension and declination direction with three modes of speed using microcontroller ATMega2560 has been made.. This research was pursed in a telescope motion control system that leads to right ascension and declination. The telescope used is one of the telescopes at Bosscha Observatory, the GOTO telescope. The current condition of the GOTO telescope has decreased. This is caused by the motion control system that was applied previously doesn-t work optimally. Therefore this research will discuss and create a new system for telescopes which will use the ATMega2560 microcontroller which is embedded in the Arduino Mega board as the brain of this system. The way this system works is first the ATmega2560 microcontroller will read the first position of the telescope after that the telescope will be moved by the handbox towards right ascension or declination and then the last position of the telescope will be read by the microcontroller. By using this latest system the servo motor in the GOTO telescope can move with three speed modes namely guide, set and slew where the speed of the guide requires a frequency of 1604 Hz, the speed of the set requires a frequency of 51.340 Hz and the slew speed requires a frequency of 501,368 KHz.

Keywords
GOTO telescope, ATMega2560, control system, declination, right ascension

Topic
Physics

Link: https://ifory.id/abstract/xVzy9D4rW7C2

Corresponding Author
M Munasir

Institutions
(a)Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya
Kampus Unesa-Ketintang, Jl. Ketintang, Surabaya, 60231

(*)munasir_physics[at]unesa.ac.id

Abstract
This work, reports on the results of research, fabrication of natural-based Graphene/SiO2 nanocomposites; graphene (GO) was prepared from coconut shells using the Hamers method and silica nanoparticles (SiO2) derived from Tetraethyl-orthosilicate precursors. Graphene/SiO2 nanocomposite fabrication using the one-pot process. The Crystal structure was analyzed using XRD, functional groups with FTIR and D-band and G-band that identified sp2 orbitals with Raman Spectroscopy. The analysis of adsorption properties of methylene blue dyes dissolved in water studied by UV-Vis spectroscopy. Graphene/SiO2 characteristics are obtained both in terms of structure and adsorption power of colours in the water, which is characterized by a trend of decreasing adsorption intensity on the UV-Vis curve.

Keywords
graphene (GO); Fe3O4/rGO; nanoparticle

Topic
Physics

Link: https://ifory.id/abstract/wFkCNthPaeqM

Corresponding Author
Al Azhary Masta

Institutions
1,3 Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi 229, Bandung 40154, INDONESIA

2 Raudhatul Jannah Sunior High School, Residence Grand Cilegon, Banten 42426, INDONESIA

4 Department of Mathematics Education, University of Georgia, Athens, United State of America

Abstract
Morrey spaces is a generalization of Lebesgues spaces. There are two type of Morrey spaces, i.e continous Morrey spaces and discrete Morrey spaces. In this paper we present sufficient and necessary conditions for Ho ̈lder-s inequality in discrete Morrey spaces. One of the keys to prove our results is to use the norm of the characteristic sequence of the balls in Z^n.

Keywords
Ho ̈lders inequality, sufficient and necessary conditions, discrete Morrey spaces

Topic
Mathematics

Link: https://ifory.id/abstract/BF2YfCZgDkHG

Corresponding Author
Dindin Nasrudin

Institutions
Universitas Pendidikan Indonesia

Abstract
The issue of Education for Sustainable Development (ESD) has long been launched. However, this concept has not been understood by everyone including pre-service physics teachers. This paper aims to describe the profile of understanding physics teacher candidates on sustainability issues in the context of education. The method used is qualitative through in-depth interviews with several respondents. The results of the study show that the understanding of pre-service physics teachers about sustainability issues is still low. A program that is planned, systematic and measurable is needed to improve their literacy related to sustainability issues that are integrated into the lecture material.

Keywords
ESD, renewable energy education, sustainability literacy

Topic
Physics Education

Link: https://ifory.id/abstract/mBJeNQpuzHgw

Corresponding Author
Ibrohim Aji Kusuma

Institutions
a) Graduate School Program, Universitas Negeri Yogyakarta
Jl. Colombo No. 1 Yogyakarta
*ibrohimaji.2018[at]student.uny.ac.id
b) Faculty of Mathematics and Science, Universitas Negeri Yogyakarta
Jl. Colombo No. 1 Yogyakarta

Abstract
Midterm exam is used to asses the extent of students‘ outcomes and mastery level of competencies in half-one semester of learning. This study aims to analyze the characteristics of item test of mathematics midterm exam of 11th grade secondary students. This study was quantitative research using descriptive explorative approach. Midterm test script consist of 40 questions with its answer key and 145 students answer sheets have collected. The midterm script and its answer key ware validated by three expert and students answer sheet was analyzed using classical test theory method using QUEST. The study shows that midtest test script and its answer key was valid with score 0,93 using Aiken indeks and internal consitency score was 0,74. It means that midtest script was feasible in learning but cannot be used to reflect students- knowledges and skills. Fit Pt-biserial score was 52,5% and Low Pt-biserial score was 47,5%. Besides, 4 items ware categorized as difficult problems, 34 items were medium and 2 items were easy problems. The difficult items consist of the arithmetic series related to real problems, infinite geometric series, algebraic limits with substitution of fraction forms containing roots and factorzation of fraction forms containing exponential.

Keywords
Item test characteristics; Midterm exam; Classical test theory

Topic
Mathematics Education

Link: https://ifory.id/abstract/XpkEmCdMvP8T

Corresponding Author
Muntazhimah Muntazhimah

Institutions
(a) Universitas Muhammdiyah Prof. Dr. Hamka
*muntazhimah[at]uhamka.ac.id

(b) Universitas Pendidikan Indonesia

Abstract
Many study explained that one of the ways to enhance student-s mathematics ability is by giving the students mathematics learning which could encourage them to control the cognitive processes that they have. The alternative is could be metacognitive strategy. By metacognitive strategy, students are guided to be able to realize what they know and what they don-t know in order to resolve the problem. Metacognitive strategy could be apply in collaborative learning settings in wich collaboration is also one of the competencies in 21st century skills. This study aims to explain the applying of metacognitive strategy in collaborative learning setting at mathematics class by preliminary study and literature study which summarizing and analyzing the result of various study that has been done. Using metacognitive in collaborative learning will increase mathematics ability because it foster confidence and awareness of mathematics concepts and principles learned and control the thought processes carried out .The impact is the metacognitive strategies could be applied in collaborative learning settings in order to enhance student-s mathematics ability

Keywords
metacognitive strategy, collaborative Learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/CWRyfZtX64wn

Corresponding Author
agria rhamdhan

Institutions
Institut Teknologi Bandung

Abstract
The application of IoT in Vehicular Ad-Hoc Networks (VANET) allows the realization of intelligent transportation systems to ensure the comfort and safety of road users. But as an implication, attacks that can interfere with this aim certainly need to be a significant concern. It is because the stakes are not only network security but also the safety of the driver and its passengers. One of the attacks which had a substantial impact on VANET was the Sybil attack. Sybil attackers illegally change into several different identities to carry out malicious activities such as disrupting routing, causing traffic jams, bottlenecks, and even accidents. Various security methods are introduced to VANET to detect Sybil attacks, but there are still several issues that have not been resolved. In this paper, we proposed the design of a defense mechanism against Sybil attacks. This mechanism aims to be suitable for application on IoT networks that have limited resources an also considering accuracy, privacy, safety, and real-world implementations. The proposed design uses a hybrid scheme with a trust-based method. Each node has an obfuscated identity to guarantee privacy. The trust center in the form of a Road Side Unit (RSU) will give a reputation value to each identity that will be evaluated periodically when in the range. Nodes form a fully distributed network when there is no RSU. It will use a data-centric neighbor trust scheme where its neighbors will assess each node based on the exchanging data. Each node reports on suspicious nodes to the RSU for evaluation. This mechanism allows RSU to evaluate suspicious node, which decides to isolate that Sybil node out of network.

Keywords
Sybil Attack, Vehicle Ad-hoc Networks, IoT

Topic
Computer Science

Link: https://ifory.id/abstract/fXQExYrkBuPe

Corresponding Author
Jantje Ngangi

Institutions
a)Biology Department, Mathematics and Natural Sciences Faculty, Manado State University, Tondano, 95619 Indonesia, jantjengangi[at]unima.ac.id
b)Agribusiness Department, Faculty of Agricultural, De La Salle Catholic University, Manado, 95000, Indonesia

Abstract
Agricultural waste in the form of lignocellulose biomass are considered to be the largest promising carbon source in the nature for transformation to its base components such as simple sugars that can be further converted to bioethanol through cellulolytic enzyme activities. Cellulolytic enzymes can be found in microorganisms such as in the digestion tracts of termites. The microbiological biodiversity in the digestive tract of termites is suspected to produce cellulolytic enzymes that would degrade lignocellulose and may have the potentials to result in bioethanol. The purpose of this research is to identify potential cellulolytic enzym producting bacteria from the digestion tract of termites from various locations of North Sulawesi. Bacteria that was screened was then isolated with PrestoTM Mini gDNA Bacteria Kit Protocol, Geneaid then continued on to 16S RNA Gene Sequencing. Several bacteria isolates were succesfully isolated from the termites digestive tract (genus Odontotermes sp and Nasutitermes sp). Molecular identification with 16S rRNA sequences indicated that isolate B1 had 97% similarity with Bacillus cereus strain L-7, isolate B2 had a similarity of 97% with Stenotrophomonas maltophillia Strain W8-8, while the two isolate isolated from Nasutitermes sp, had a degree of similarity of 99% to E. faecalis.

Keywords
cellulolytic bacteria, digestive tracts, North Sulawesi, termites, 16s RNA

Topic
Biology

Link: https://ifory.id/abstract/2p8hGU9EbWgM

Corresponding Author
Masriyah Masriyah

Institutions
Universitas Negeri Surabaya
Institut Teknologi dan Sains Nahdlatul Ulama Pasuruan

Abstract
Mathematics has an important role in developing the human mind power, one of them is critical thinking. The critical thinking ability might be taught by using problem solving. The strategy that is used to solve the problem can be affected by student-cognitive style. The research purpose is to identify student- critical thinking ability in problem solving based on their cognitive styles. The research subjects are two student who have reflective or impulsive cognitive style. The data were collected by giving cognitive style, mathematics ability, and problem solving tests, and interview. The research result showed that the reflective student has seven indicators of critical thinking ability, they are the ability to comprehend and express the meaning of information, distinguish relevant and irrelevant information, analyze the data, collect and organize information, find ways of completion, draw conclusions, and evaluate the completion. Based on the level of critical thinking, she is very critical. While impulsive student has four of the seven indicators of critical thinking ability, they are the ability to comprehend and express the meaning of information, distinguish relevant and irrelevant information, collect and organize information, and draw conclusions. Based on the level of critical thinking, she is critical enough.

Keywords
Critical Thinking Abilities, Problem Solving, Cognitive Style

Topic
Mathematics Education

Link: https://ifory.id/abstract/dW6h39JKMC7T

Corresponding Author
NENI HERMITA

Institutions
Program Studi PGSD, Universitas Riau, Pekanbaru 28293, Indonesia

Abstract
The aim of the study was to identify levels and model of understansding of prospective primary school teachers related to concepts of heat convection. This study uses the descriptive quantitative method. Research subject were 30 prospective primary school teachers at one university in Riau Province who had attended the basic concepts of science course with their lecturers. The instrument used to collect data is a conceptual understanding test consisting of four parts of the questions. The results showed that profile of levels of understanding of primary school teachers retated to concept of heat convection are: Sound Understanding (SU) (0 %), Partial Understanding (PU) (47%), Incorrect Understanding (IU) (20%), No Understanding (NU) (20%), No response (NR) (13%), and profile of model of understanding are: Optimum Model (OM) (0%), Uncreative Model (UM) (10%), Theoretical Model (TM) (20%), Practical Model (PM) (17%), Memorizing Model (MM) (20%), Inappropriate Model (IM) (33%). These results indicated that lectures on basic concept of science carried out by the lecturers had not facilitated the achievement of the sound understanding level and the optimum understanding model for prospective primary school teachers.

Keywords
Prospective primary school teacher, levels of understanding, model of understanding, Heat Convection.

Topic
Integrated Science Education

Link: https://ifory.id/abstract/9ugcjp82Ck3n

Corresponding Author
Yus iran Yus iran

Institutions
a) Department of Biology Education, STKIP Bima, Kota Bima, Nusa Tenggara barat, Indonesia
b) Department of Physics Education, STKIP Bima, Kota Bima, Nusa Tenggara barat, Indonesia
*yusiranbima[at]gmail.com
c) Department of Natural Science Education, Universitas Tidar, Kota Magelang, Jawa Tengah, Indonesia

Abstract
The present study aims to identify argumentation skills of pre-service teachers. Argumentation skills are pivotal aspects have to be mastered by college students. They mastering these skills well potentially own good understanding of concepts. Therefore, it is crucial to identify argumentation skills for mapping learning activities. The present study utilizes single case study as a research method. There are fifty participants who are coming from two colleges in Indonesia. They focus on being physics and biology teachers for future. To analyze the argumentation skills of them, a three tier test is developed. This test has specific characteristic due to providing a certainty index of students. Strong scientific argumentation, intermediate scientific argumentation, weak argumentation, cannot propose argumentation, and invalid are types of certainty index provided. Finding research shows that weak argumentation is dominant type of certainty index. The implication of this present study is to generate a certain approach to teach argumentation skills

Keywords
argumentation skills; three tier argument test; scientific argumentation

Topic
Integrated Science Education

Link: https://ifory.id/abstract/TUuHBaGmNedW

Corresponding Author
Eddy Prasetyo Nugroho

Institutions
Computer Science Education Departement
Faculty of Science and Mathematic Education
Indonesia University of Education

Abstract
Along with the increasing use of computers, business activities and data storage have also begun to be transferred, from the initial use of document files, now changed to computing activities and digital data stored on the computer. The increasing importance of the computer certainly raises its own challenges and risks. One of the risks and challenges is the security of the computer system and network. Various ways have been done to improve computer network security, one of which is using the Intrusion Detection System (IDS). IDS is one of the security management that is able to detect attacks on a computer network in real-time, for example Denial of Service (DoS) attacks. To maximize the IDS detection function that is able to detect unknown attacks, a data mining approach is used to create an IDS that uses anomaly based detection techniques. In this study, a sequential pattern mining technique, the CM-SPADE algorithm, is used to generate IDS rules that can detect DoS attacks. Modeling and rules are made by applying the CM-SPADE algorithm to the KDD Cup 1999 data set. The results of this study reveal that the implementation of the CM-SPADE algorithm is able to produce IDS rules that can detect DoS attacks with an accuracy rate of 97.976%.

Keywords
Intrusion Detection System, data mining, CM-SPADE, KDD Dataset, Snort

Topic
Computer Science

Link: https://ifory.id/abstract/Rz9a8PnkWp37

Corresponding Author
Faizatul Mabruroh

Institutions
a) Physics Education, UIN Raden Fatah Palembang.
Jalan Prof.KH.Zainal Abidin Fikry km.3,5 Palembang.
*faizatul.mabruroh_uin[at]radenfatah.ac.id
b) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi
No. 229, Bandung 40154, Indonesia.

Abstract
This study was aimed to construct a test instrument for assess critical thinking skills of high school students on the concept vibration and wave that are focused on sound wave. The research using a mixed method with sequential exploratory design, consisting of: 1) the preliminary study phase; 2) the design and review phase; 3) testing phase the test instrument. Test instruments in the form of essays, consisting of 18 questions contain 5 indicators and 8 sub indicators of critical thinking skills expressed by Ennis, with the questions that are qualitative and contextual. Analysis of implementation test results using hypothesis testing to different average values to get an overview of the test instruments ability to distinguish between the critical thinking skills of students who get learning process which to exercise critical thinking skills of students and who get learning process which not to exercise critical thinking skills of students. ANOVA one way using to get a picture of the ability of instruments are constructed in identifying similarities critical thinking skills among students who had learning process to exercise critical thinking skills using problem based learning, learning cycle model (learning cycle) 5E, and inquiry learning model. Pearson product moment correlation test was performed to obtain the relationship between critical thinking skills with mastery of leraning materials on students- test implementation.

Keywords
critical thinking skills, critical thinking skills test instrument, vibration and wave, sound wave.

Topic
Physics Education

Link: https://ifory.id/abstract/wPCRe7tDQLYV

Corresponding Author
Angeline Viska Ayu Rosalia

Institutions
Magister of Chemistry Education Study Program, Postgraduate School, Universitas Negeri Medan, Medan 20221, Indonesia(1)
Departement of Chemistry, Universitas Negeri Medan, Medan 20221, Indonesia (2)

Abstract
The aim of this research was to know the gain of students achievement that taught by using dubido. The research has been done in Chemistry Educational Study Program in Unimed. The experimental class was given treatment with teaching by using dubido media based on contextual. The experimental class has fulfilled the requirement for normality and homogenity test. The mean of pretest results and posttest results were 42.240 and 84.480. The increase of posttest results indicated that learning by using dubido based on contextual can improve students achievement. The increase of students achievement signed by gain percent with the percent of gain value was 73.3. The result of t test was obtained from tcount is more than t table (2.590 is more than 1.677) at alpha is 0.05, it means that the implementation of dubido based on contextual was given positive effect to increase students achievement.

Keywords
Contextual, Dubido, Rate reaction, Students Achievement

Topic
Chemistry Education

Link: https://ifory.id/abstract/erdWwKXmb2Nz

Corresponding Author
Rafidah Almira Samosir

Institutions
a)Department of Chemistry Education, Graduate Study Program, Universitas Negeri Medan (State University of Medan), Medan, North Sumatera, INDONESIA, 20221, E-mail : rafidahalmira7[at]gmail.com
b)Department of Chemistry, Universitas Negeri Medan (State University of Medan), , 20221, E-mail: msitumorang[at]unimed.ac.id
*Correspondence: Manihar Situmorang, Jl. Willem Iskandar, Medan, North Sumatra, INDONESIA 20221, Phone: 062-61-6613365, Faximile: 062-61-6613319, E-mail: msitumorang[at]unimed.ac.id

Abstract
An afford to chose the right teaching and learning strategy in the teaching of chemistry topic is very crusial as it is known that chemistry knowledge and skills are involveed. The teaching and learning paradigm have to be ajusted to support the enactment of competence curriculum suited to Indonesian National Qualifications Framework (Kerangka Kualifikasi Nasional Indonesia, KKNI). The policy has been stated in Universitas Negeri Medan to adopt KKNI curiculum, including in Analytrical Chemistry. Therefore, innovation in the teaching and learning have to be made for all subjects in the implementation of a competence-based curriculum suited to KKNI. The aim of the research is to implement an innovative learning material with project to improve students- performance in the teaching of complexometric titration topic of Analytrical Chemistry. The research steps are consisted of providing sets of mini project on complexometric titration topic, innovation of a learning package with multimedia, and implementation of innovative learning material as learning media in the class. Research results showed that a standard and innovative learning package containing of mini projects for complexometric titration topic have been developed suited to the KKNI curriculum. The project example and the video to do the projects that are provided in the learning package are found effective to guide the students to do the desire project. Integration of multimedia in the learning package has motivated the students to learn the topic and make chemistry easy to learn. An innovative learning material with project has been proved to be able to improve students performance in analytical chemistry procedures. The facility available in a learning package adequate to guide the student to learn chemistry independently and students centre learning style was achieved.

Keywords
Innovative, Learning Material, Contextual Learning, Multimedia, General Chemistry

Topic
Chemistry Education

Link: https://ifory.id/abstract/zhgK4tBZCAca

Corresponding Author
Sukarmin Sukarmin

Institutions
Universitas Negeri Surabaya

Abstract
This study goals to describe the implementation of interactive multimedia and kit with Writing to Learn (WTL) strategies for hearing impairment students on the chemistry in daily life topic for junior high school. Interactive Multimedia and kit were implemented to 12 students junior high school with one group pretest-posttest design. The research instruments used was the observation on the use of interactive multimedia and the kit and test sheets. Data collection techniques are observation and tests analyzed descriptively. The Writing to Learn strategy component trained in this study is guided free writing, creative piece, and the end of class reflection. The results of the study showed that (1) interactive multimedia and kit implementation were good and very good category, (2) the students learning outcomes were increased after the learning, and (3) students responses indicate that the interactive multimedia and kit response were positive

Keywords
Interactive Multimedia, kit, Writing to Learn Strategy, Hearing Impairment Student

Topic
Chemistry Education

Link: https://ifory.id/abstract/Z7XK6qvWHuTy