Indonesia Conference Directory

Corresponding Author
Yulisa Nurdini

Institutions
a)Pendidikan Biologi,Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229 Bandung 40154, Indonesia
*yulisanurdini[at]upi.edu
b) Departemen Pendidikan Biologi, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229 Bandung 40154, Indonesia

Abstract
Development of 21st century skills becomes essential life skills in supporting individuals to adapt well to 21st century life. One of the 21st century skills that needs is critical thinking skills. Development of student skills can be done through learning and appropriate assessments. The application of assessment for learning is an effort that can be done to develop student skills. The feedback provided can help students to plan and improve their learning strategies. However, the application of assessments in the learning process is often not optimal. Therefore, it is necessary to do research on the application of assessment for learning to improve students critical thinking skills. This study uses quasy experiment method with the pretest posttest control group design. Assessment for learning through written feedback is applied to experimental class, while the control class is given of conventional assessment. Indicators of critical thinking skills in this study were developed based on the Partnership for 21st Century Skills. The results showed that the application of assessment for learning through written feedback can improve students critical thinking skills. This is indicated by the experimental class average N-gain value is 0.82 in Pteridophyta and 0,87 in Bryophyta subchapter.

Keywords
Assessment for learning; written feedback; Plantae

Topic
Biology Education

Link: https://ifory.id/abstract/FNUXDjyeq2nf

Corresponding Author
Masjudin Masjudin

Institutions
IKIP Mataram
Jalan Pemuda No. 59A Mataram, 83125, Indonesia

Abstract
The purpose of this research is to describe the students statistical thinking ability in understanding statistical data. The statistical thinking consists of the following four indicators: (a) ability to describe data; (b) ability to organize and reduce data; (c) ability to represent data; and (d) ability to analyze and interpret data. This research is a descriptive research with a qualitative approach. The subjects in this research were eighth grade students of SMP Negeri 3 Lingsar. Data collection techniques by providing evaluation tests statistical thinking abilities and interviews. The results of this research showed that 4.2% of students had high statistical thinking ability, 25% of students had medium statistical ability, and 70.8% of students had low statistical thinking ability. So that, can be concluded the statistical thinking ability of students is in the low category. Student achievement in each indicator of statistical thinking ability is detailed as follows: (a) students ability to describe data is in the high category; (b) students ability to organize and reduce is in the high category; (c) students- ability to represent data is in the medium category; and (d) Students- ability to analyze and interpret data is in the low category.

Keywords
Statistical thinking ability; Statistical data

Topic
Mathematics Education

Link: https://ifory.id/abstract/rmdGC7cgqLnZ

Corresponding Author
Agustiani Putri

Institutions
(a) Department of Mathematics Education, Universitas
Negeri Jakarta, Jl. Rawamangun Muka, Jakarta Timur
3220, Indonesia
agustianiputri15[at]gmail.com
(b) Ph.D of Mathematics Education, Postgraduate
Program, Universitas Negeri Jakarta, Jl. Rawamangun
Muka, Jakarta Timur 13220, Indonesia
(c) Master of Mathematics Education, Graduate Program,
Universitas Negeri Jakarta, Jl. Rawamangun Muka,
Jakarta Timur 13220, Indonesia

Abstract
Generative and Connecting, Organizing, Reflecting, Extending (CORE) are two sets of learning design that can develop learners- critical thinking skill. The objective of this study was to point out the best model to develop learners- critical thinking skill. For this objective, a quasi-experiment was done in 12 Jakarta Senior High School. Two groups of eleventh grades learners were elected by random sampling method. Generative learning was applied to the first group, while CORE learning was applied to the second group. Learners- critical thinking was regulated by the test which produced based on critical thinking skill indicators. Before starting the program, each group took an initial ability test. The program lasted for four weeks, and four hours each week; and at the end of the program post-test works were taken from the candidates. The hypothesis was tested using independent sample t-test with a probability of significance value of 0.05.The results of the research shown that there was a significant difference between the t-test score points of the experimental groups (P<0.05) namely t-count = 3,092 > t-table = 1,667. The results also showed that the average of learners- critical thinking skill points with generative learning model was higher than the other group. It was observed that this paper previously uncovered a role for (1) Barbara L. Grabowski (2014) that generative learning model can increase critical thinking skill and (2) Robert C. Calfee (2004) that CORE can increase critical thinking skill. This manuscript builds on our prior study to compare both models and focus on the effects on critical thinking skill.

Keywords
generative learning model, CORE learning model, critical thinking skill

Topic
Mathematics Education

Link: https://ifory.id/abstract/Ux8WtG63rag4

Corresponding Author
Deti Ahmatika

Institutions
1) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*dheti.ah0502[at]upi.edu
2)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
3)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This study aims to describe the process of creative thinking of students based on the Wallas model. This study has research qualitative descriptive using triangulation data. Subjects were categorized as high, moderate, and low ability after being given a test of creative thinking ability. The object of this research is the existence of how junior high school students solve mathematical problems. Data were analyzed through the classification of representations, and conclusions. The results showed that 1) there were 20% of students who did not complete and only reached the preparation stage, called the low category group; 2) there are 53.33% of students reaching the illumination stage even though to arrive at this stage students need a long time, called the medium category group; and 3) 26.67% of students have completed the verification phase, called the high category group. For students with low and medium ability categories, they still need assistance when experiencing obstacles in their creative thinking process, while high ability students need enrichment material.

Keywords
Creative Thingking Process, Problem of Mathematics

Topic
Mathematics Education

Link: https://ifory.id/abstract/Y4dvNarDnquX

Corresponding Author
Nur Ayni

Institutions
a) Departement of Mathematics Education, Universitas Swadaya Gunung Jati, Jl. Perjuangan No. 1 Cirebon 45134, Indonesia

Abstract
This research was encouraged by students low mathematical representation ability with the findings of problems in the three-dimensional material of junior high school and the limited text books which povided by the teachers or students during the teaching and learning process, and the non technology-based teaching such as the developed digital teaching materials. The development of teaching materials which recently caried out is still in the form of conventional teaching namely printed-teaching materials. Whereas, the use of printed teaching materials in the three-dimensional subject is considered to be less to facilitate students geometry visualization ability. One of the solutions that can be carried out to overcome these problems is developing 3-dimensional digital teaching materials based on the ability of mathematical representation in the three dimensions material of junior high school which is valid and practical. This research is a kind of development research by using the ADDIE model namely Analysis, Desain, Development, Implementation, and Evaluation. This teaching material was validated and tested for practicality. So, it can be concluded that digital teaching material can be used in the teaching and learning process and it was easy to use by students.

Keywords
Digital Book; Mathematics; ADDIE

Topic
Mathematics Education

Link: https://ifory.id/abstract/NhR4Tqr7FPKx

Corresponding Author
A. Halim

Institutions
(a) Universitas Syiah Kuala, Aceh Indonesia 23111
(b) Faculty of Education, Universiti Kebangsaan Malaysia, Kuala Lumpur 43000
(c) High School in Banda Aceh 23145

Abstract
Many efforts have been made to reduce misconceptions in physics learning, including traditional learning methods (without interactive media) or with modern learning (using interactive media). Most interactive media used are based on calculations or graphics. Usually students experience difficulties when interpreting the data shown in the media. To solve this problem, EduPlasa interactive media is based on images, contexts and final conclusions are displayed by EduPlasa media. The study used a quantitative approach, virtual experimental methods and data collection using the three tier diagnostic tests. The target population of all high school students in the city of Banda Aceh, but with a variety of considerations taken a sample of randomly 28 students of SMA 7 Banda Aceh. Data analysis used descriptive statistics to get a percentage reduction in student misconceptions on the concept of static fluid. The calculation results show that there was a reduction in misconceptions of 60.34% in other words a reduction in the misconception of the static fluid concept was very significant after the EduPlasa interactive media was applied. Inference from research results, teachers are encouraged to use image-based interactive media to reduce misconceptions in students

Keywords
misconception, EduPlasa, Media, Three-Tier Test, Diagnostic

Topic
Physics Education

Link: https://ifory.id/abstract/RrK9Ac6WH2QN

Corresponding Author
Maulana Baharsyah

Institutions
1postgradyate School Indonesia University of Education
Jl. Dr. setiabudi No. 299 Bandung 40154, Indonesia
2Departemen Chemistry Education, University of Education
Jl. Dr. setiabudi No. 299 Bandung 40154, Indonesia

*) baharsyahlana[at]gmail.com

Abstract
Abstract. The skills of the 21st century are expected to be solution in the face of industrial revolution 4.0 this skill comes after students gain an education. So to confront such matters, required an innovative learning system corresponding with the advancement technology. It is therefore expected that STEM-based learning can be a solution in face of these challenges. This research aims to develop practical design based STEM learning colloidal designed to build students science literacy through the creation of probiotic ice cream leather waste from pineapple. Research methods used namely refers to a development model Thiagaran 4-D (Define, Design, Develop, Diseminate) but this only used in research to develop. The definition phase is carried out preliminary studies to know the use method teaching in schools General, stage design was done designing learning devices form of implementation plan Learning and worksheet. Participants in this research were 20 students of Class XI. Data analysis was carried out by calculating percentage and the results were interpreted to determine the validity and feasibility of the practicum design developed. The results of the study stated that the practicum design developed was feasible to be applied to learning for students of Class XI on Colloidal material.

Keywords
Practical Design, STEM, Probiotic Ice Cream, Pineapple Skin

Topic
STEM Education

Link: https://ifory.id/abstract/yMv9xmfZtR6d

Corresponding Author
Siska Nerita

Institutions
Biology Education STKIP PGRI Sumatera Barat, Jalan GUnung Pangilun Nomor 4 Padang

Abstract
The research team has developed handout based on guided disovery method in process evaluation and learning outcomes of biology subject. Development has resulted handout that valid, practical, effective, and disseminate stage will be carried out. The disseminate stage is done at Program Studi Pendidikan Biologi Sekolah Tinggi Keguruan dan Ilmu Pendidikan Ahlussunnah Bukittinggi, Sumatera Barat. This study aims to determine student learning motivation by using products that have been developed. This is a development research using a 4D model, which is in the disseminate stage. The instrument used is student learning motivation questionnaire. The questionnaire was filled out by students of Program Studi Pendidikan Biologi STKIP Ahlussunnah who have taken the course of process evaluation and learning outcomes of biology subject as many as 20 students, and the data is processed using a percentage formula. The results showed that the average student learning motivation after using the handout was 81,18% (very effective). It can be concluded that at the disseminate stage, handout based on guided discovery method in process evaluation and learning outcomes of biology subject have been effectively seen from student learning motivation.

Keywords
disseminate, handout, student learning motivaton

Topic
Biology Education

Link: https://ifory.id/abstract/BzucECKbG4M6

Corresponding Author
Aan Hasanah

Institutions
a) Departemen Pendidikan Matematika, Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
b)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
Deaf students- hearing problem results in their mastery of language and mathematics lower than hearing students. Learning the topic of rounding is difficult for deaf students because it requires a good understanding of language and a true perception in math concepts, in which are abstract in nature. Learning concepts needs a special strategy for this type of students, as generally mathematics is difficult to be translated and communicated by sign language. This specificity forces them to possess unique behavior in understanding everything through visual power. This paper discusses a study of the creation of a book and smartphone applications as devices based on augmented-reality (AR) software on the topic of rounding accompanied by rich visualization to facilitate deaf students in achieving mathematical basic competencies. This study aims to describe and reveal the validity and the effectiveness of designed devices through their implementation in a classroom. The research and development method with ADDIE model is used in this study consisting of five stages, namely: analysis, design, development, implementation, and evaluation. The results of this study show that the AR-Book and the AR-Smartphone application are valid used by deaf students and both devices are effective in achieving their mathematical basic competencies.

Keywords
Augmented Reality Smartphone Learning Material, Deaf Student, Basic Competence

Topic
Mathematics Education

Link: https://ifory.id/abstract/UaE2TYuw9DGF

Corresponding Author
Titi Rohaeti

Institutions
Universitas Muhammadiyah Cirebon

Abstract
This study aims to knowing of mathematics education students- entrepreneurship in facing the digital era between students who have and have not taken Entrepreneurship courses. The subjects of this study are Mathematics education students of Universitas muhammadiyah Cirebon, they are 25 students who have not taken the entrepreneurship courses and 25 students who have taken the entrepreneurship courses in the academic year of 2018/2019. This study uses explanatory research through survey method under a quantitative approach.

Keywords
Enterpreneur Motivation, Enterpreneurship, Digital Era,Mathematics Education

Topic
Mathematics Education

Link: https://ifory.id/abstract/jQVFb49XpZty

Corresponding Author
Fenny Roshayanti

Institutions
Universitas PGRI Semarang

Abstract
The environmental issues that happened in the northern part of Central Java are getting worse. Human activity is believed as the main factor of environmental damage. The developing in infrastructure, changing the coastal area into harbor and industry and also habit in throwing waste material into the sea will contribute great damage in the environment. Then, preventive action is needed to overcome this problem. By changing the young generation-s perception, awareness, and action with the integration of environmental literacy in learning practice will become the best way to fix these challenges. This research is aimed to develop environmental literacy-integrated learning in high schools and measure student-s environmental literacy as a result of the implementation of this integrated learning. The environmental literacy-integrated learning combines environmental literacy aspects with problem-based learning model. In addition, a set of learning media and module based environmental literacy are used as supporting materials in this research. This research use mix method with a qualitative approach to examine the quality of the environmental literacy-integrated learning. The quantitative approach also used with quasi-experimental design to measure the effect of environmental literacy-integrated learning which involving 30 students in the experimental class and 30 students in the control class. The score of environmental literacy is taken after the implementation of environmental-integrated learning using Middle schools environmental literacy surveys (MSELS) questionnaires. The data then analyze using ancova. The qualitative data is also used to evaluate the implementation of environmental literacy-integrated learning. The result shows that environmental literacy-integrated learning gives positive impact in student-s comprehension in all environmental literacy aspects. In addition, a statistical analysis also shows significant value as 0.000 (p< 0.05). This result indicates that environmental literacy-integrated learning can improve student-s environmental literacy.

Keywords
Environmental literacy, Integrated learning, High School

Topic
Biology Education

Link: https://ifory.id/abstract/r6yUNMpFabDc

Corresponding Author
Titi Rohaeti

Institutions
Universitas Muhammadiyah Cirebon

Abstract
This study is aimed at knowing and describing mathematics students- entrepreneurship motivation in facing digital era toward online business. The subjects of this study are Mathematics education students of Universitas muhammadiyah Cirebon, they are 37 students in the academic year of 2018/2019. This study uses explanatory research through survey method under a quantitative approach. Key words: Entrepreneurship motivation, Digital Era, Online Business, Social Media

Keywords
Enterpreneur Motivation, Digital Era, Mathematics Education, Muhammadiyah Cirebon University

Topic
Mathematics Education

Link: https://ifory.id/abstract/4dAXgxKG8v2t

Corresponding Author
Usmeldi Usmeldi

Institutions
Universitas Negeri Padang

Abstract
According to the 2013 curriculum, natural science subjects in Junior High School were developed as integrated science. Integrated science learning used themes to link subject material to the everyday life of students, so they can gain meaningful experiences. The results of the survey showed that the science textbooks material has not been integrated and has not involved student activities. This has an impact on the low competency of students. One effort to improve student competency is to develop natural science textbook use research-based integrated learning. The aim of the research was to develop natural science textbook use research-based integrated learning. The research used the Plomp model which consisted of three phase namely preliminary research, prototyping phase, and assessment phase. The research instruments were observation sheets, questionnaires, interview guide, validation sheets, tests, attitudes and skills assessment sheets. The results showed that natural science textbook use research-based integrated learning was categorized as valid, practical, and effective. Validity of textbook based on expert judgment. Practicality of textbook based on teacher and student responses. The effectiveness of textbook in improving student competency based on the competency of most students was included the good category and the increase in student competency in the domain of knowledge, skills, and attitudes of students.

Keywords
textbook, natural science, research-based integrated learning.

Topic
Science Education

Link: https://ifory.id/abstract/taQRewEzqu8f

Corresponding Author
Siti Sarah Nurhijah

Institutions
Biology Department, Postgraduate School of Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
*sitissarah[at]upi.edu

Abstract
The challenges of 21st century globalization require students to have various skills needed in compete at the global level. One of the 21st century skills students need to have is critical thinking skills, but student-s critical thinking skills in Indonesia are still relatively low. To develop this skill, learning is needed along with appropriate assessment. The application of formative assessment in learning is one of the efforts in developing the skill. Through formative assessment, teacher can make appropriate learning strategies to facilitate student learning needs. However, the practice of assessment for learning rarely facilitates student learning needs. Thus, this study was needed for investigating the effect of formative assessment in develop critical thinking skill of students. The quasy experiment method is used in this study with the pretest posttest control group design. The experimental group was given the application of formative assessment through oral feedback during learning, while the control group was given the conventional assessment. The result showed that formative assessment through oral feedback can develop critical thinking skill of students, indicated by the experimental group has higher critical thinking skill improvement than control groups in Spermatophyta and Bryophyta chapter.

Keywords
Formative assessment, oral feedback, 21st critical thinking skills, Plantae

Topic
Biology Education

Link: https://ifory.id/abstract/CmHkNrQ2Lq3K

Corresponding Author
Yushilatu Felayati Aziiza

Institutions
1Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Abstract. The study aim knows the factors cause the learning outcomes of students unreachable the standard minimum criteria (KKM) on mathematics learning. The method used in this study was qualitative descriptive. The subjects research used the purposive sampling method. Data collection tools are questionnaires about the factors that cause students to unreachable KKM. techniques data analysis uses a percentage formula. The conclusion of this research is the main cause of the students to get the value below KKM on mathematics teaching is the lack of motivation that exists in the students, the skill in learning mathematics is still very low, the health of Students Very influential about the learning process. In addition to the internal factors, there are also external factors, the external factor consists of the teachers and aspects of the parent. Students feel motivated to learn if the teacher uses media or mathematical aids. Another external factor is parents, parents have given cellphones to their children. These two factors cause students not to reach the KKM mathematics learning.

Keywords
Standard minimum criteria, mathematic learning, unreachable

Topic
Mathematics Education

Link: https://ifory.id/abstract/WDh6TPZ4QGKv

Corresponding Author
Rahayu Puspa Hadiyati

Institutions
Faculty of Science Education, Universitas Pendidikan Indonesia, Jl. DR. Setiabudi No.229, Bandung 40154, Indonesia

Abstract
This present study investigated the effects of writing workshop based on practical investigation on students writing skill of popular scientific article. Students were asked to write popular reports of science about marine resources. A quasi experimental design was used with two 10th-grade classes at the department of Fisheries Product Processing Agribusiness at Marine Vocational High School, Indramayu, each consists of 20 students. The experimental group of students assigned into the writing workshop based on practical investigation, while the control group assigned into the writing workshop based on conventional practicum. The learning stages of experimental group are divided into four stages, namely the introduction stage, the investigative practicum stage, the workshop stage by experts, and the presentation stage. The scientific stages in an investigative practicum can provide actual knowledge that can be the initial capital for students writing popular scientific articles. Factual knowledge and daily experience will motivate students to start writing. Before the treatment, a pre-test was administered to both groups in order to investigate the writing performance and sub skills of focus, sources, style, and vocabulary of students. Popular scientific article assessment results indicated that the experimental group performed significantly better quality and quantity of writing popular scientific article than the control group.

Keywords
Writing Workshop; Practical Investigation; Popular Scientific Articles; Marine Resource

Topic
Biology Education

Link: https://ifory.id/abstract/g4vbPGWyUF3e

Corresponding Author
Noor Hidayati

Institutions
University of Sebelas Maret

Abstract
The purpose of this study is to describe students mathematical representation ability in solving geometry problems. The ability of mathematical representation of students in this study is a way or steps used by someone to present mathematical ideas or ideas into interpretations in the form of visual, symbolic, and verbal. The focus of this study is to analyze the ability of students mathematical representation based on operational forms which include visual representation, simvolic representation and verbal representation. The research method used is the qualitative research method. the research subjects were three students at the Bakti Junior High School in Madiun. The data in this study consisted of data resuction, data presentation, and conclusions or verification. The results of the study show that students in the aspect of visual representation are able to understand the image correctly. In the representation aspect students still often make mistakes in number counting operations. In the aspect of verbal representation students have not been able to write mathematical sentences.

Keywords
Geometry, representasi visual, representasi symbolic, representasi verbal

Topic
Mathematics Education

Link: https://ifory.id/abstract/fQkxCNG8WTw3

Corresponding Author
Asep Kurnia Jayadinata

Institutions
a) General education and Character, Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
*asep_jayadinata[at]upi.edu
b) General Education and Character, Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
c) Biological Education, Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
Environmental changes due to the irresponsible application of technological innovation and human behavior that are not environmentally friendly have caused various environmental crises. Various studies recommend the importance of the role of science education in building citizens scientific literacy abilities. Therefore, this ability needs to be possessed by all students of primary school teachers (PGSD students) as part of citizens. PGSD students literacy scientific abilities are focused on the nature of science (NOS) and attitudes toward teaching NOS. This study aims to obtain information about the views of students about the nature of science concept (NOS) and attitudes toward teaching NOS obtained from filling questionnaire instruments views on science and education (VOSE). Data were obtained from 132 students of the 2017/2018 academic year who had completed their lectures (GD302) in science education in elementary schools. The findings of this study revealed that PGSD students were able to feel some of the problems of cencept NOS and held a positive attitude towards some NOS teaching problems.

Keywords
Literacy scientific;Nature of Science, Views On Science and Education (VOSE)

Topic
Science Education

Link: https://ifory.id/abstract/2TvN3MQZuzpc

Corresponding Author
Riksa Rishanif Suwitno

Institutions
Departemen Pendidikan Matematika, Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*rriksarsx7[at]gmail.com

Abstract
This research is aimed at seventh-grade junior high school students with the purpose to analyze the level of mathematical communication thinking ability at the topic of algebra. This research was conducted by giving tests that can measure the ability of communication thinking mathematically and interviewing subjects based on their answers. The results obtained are then analyzed to see the students mathematical communication thinking ability. The research instrument used is a test of communication thinking ability, and interview with students. The results showed that students have a high, moderate and low of mathematical communication thinking ability at the topic of algebra.

Keywords
Mathematical Communication

Topic
Mathematics Education

Link: https://ifory.id/abstract/M86Bq2LRGxgw

Corresponding Author
Munaf Ismail

Institutions
Universitas Islam Sultan Agung

Abstract
Cases of vehicles theft in the Central Java region occurred 869 cases, the percentage was 57.86% against other crimes. To prevent vehicles theft, the police need public participation by increasing awareness of their vehicles. Vehicle theft can occur due to owner negligence and lack of safety locks on the vehicle. This study aims to create data mining application as monitoring vehicle position. The transmitter WiFi 2.4 GHz placed on a vehicle, then measured the RSSI signal by an android application based on fuzzy logic. Indication of theft is that the vehicle is positioned away from the owner, so the signal RSSI is less than -90 dBm. Fuzzy logic monitors this change in distance. When the membership function is lost, fuzzy logic instruct android to activated the alarm . Fuzzy logic was able to make decision give a alarm to user when RSSI signal less than -90 dBm. RSSI signal is less than -90 dBm when the distance is 20 meters if there is a wall barrier, without obstacle the distance is up to 80 meters. RSSI signal is influenced by the measurement environment.

Keywords
Data mining application, Fuzzy Logic, Monitoring vehicle position

Topic
Information Technology

Link: https://ifory.id/abstract/PERM47mFTWAr

Corresponding Author
Megumi Akai-Kasaya

Institutions
An animate brain consists of interconnected complex biological networks of locally active components. The informational processing exploits massive parallelism with low energy consumption, utilizing the multiplicity and stochasticity of signals. Recently, utilization of desiglees random networks of inanimate matter for computation or informational processing has started to be proposed. Here we introduce two nanomaterial networks, which show complex response showing potency for advanced future signal processing.

Abstract
We succeeded in showing experimental evidence to prove Coulomb blockade taking place on Two-dimensional organic conducting polymer films. Electrical conductivity of hexylthiophene monolayer showed temperature-dependent threshold voltage in temperature range of 150K—4K and increased in power law of the current-voltage beyond the threshold. The onset of two-dimensional Coulomb blockade in the organic thin film was theoretically verified through the calculation of the delocalization of electric charge in the molecular film. This system meets the criteria to be a suitable building block for the physical realization of a cellular neural network. We further found a neuromorphic device that consist of extremely dense and random single-walled carbon nanotube (SWNT) complexed with polyoxometalate molecule generating spontaneous spikes similar to nerve impulses of neurons. A simulation calculation of the random molecular network model, which are able to store electric charges, replicate spikes generated from the network. This molecular model would very likely become a component of reservoir computing that is anticipated as next-generation artificial intelligence. These results indicate the possibility that complex functional networks can be constructed using molecular devices, and contribute to the development of neuromorphic devices.

Keywords
Nanomaterial Molecular Device Neuromorphic Neural Network

Topic
Information Technology

Link: https://ifory.id/abstract/qyPJN4QLxpnt

Corresponding Author
Tsubasa Hori

Institutions
Kwansei Gakuin University

Abstract
Transition-metal ions with d3 electronic configuration such as Cr3+ and Mn4+ are utilized as emission centers in various luminescent materials such as ruby (Cr3+-doped -Al2O3) or alexandrite (Cr3+-doped chrysoberyl). Since it is difficult to investigate the multiplet energy levels of Cr3+ in a wide variety of oxide crystals experimentally, the theoretical prediction of the energy of the emission level (2Eg) is indispensable for the efficient development of novel Cr3+-doped luminescent materials. In this study, we predicted the multiplet energy of the emission level (2Eg) of Cr3+ in oxides by first-principles calculations based on the discrete variational multi-electron (DVME) method using relatively small clusters consisting of seven atoms. However, the correlation coefficient between the calculated 2Eg energy and the experimental ones was relatively low (0.52). In order to improve the accuracy of the prediction, we also performed a machine learning modeling. By using the calculated 2Eg energy and the other electronic and structural parameters as the attributes, we created the predictive model of the 2Eg energy of Cr3+ in oxides. The predicted 2Eg energies are in good agreement with the experimental ones, showing a high correlation coefficient of 0.92.

Keywords
Cr, DV-Xa

Topic
DV-Xa Method

Link: https://ifory.id/abstract/7zGfkQcdYBpg

Corresponding Author
Teruyuki Toba

Institutions
1 Department of Advanced Materials Science, Graduate School of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0301, Japan

2 Department of Chemistry, Faculty of Science, Okayama University of Science, , 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan

Abstract
We introduce SuperAtom, which is called a modern alchemy and has been studied around the world. The SuperAtom is a nanocluster composed of multiple atoms, for example Al13. But very interestingly, the “SuperAtom” can mimic the chemical properties of “atom”, for example, the Al13 exhibits the halogen atom Cl. If this SuperAtom is constructed to an appropriate size and can be synthesized freely, there is the possibility to be placed as an "artificial atom" in a three-dimensional periodic table such as the conventional two-dimensional periodic table. In recent years, the exhaustion of rare metals has become a big problem, so that in the next generation of materials and devices, the SuperAtoms play as an important role, and it is expected to be used for various materials or as a substitute for expensive metal catalysts such as Pt. From these points of view, the SuperAtoms have been studied all over the world up to now, but there is not much studies on their electronic structures. Therefore, in this study, we have analyzed the electronic state of the chalcogen-inclusive type SuperAtom M@Al12 (M = Be, Mg, Ca, Sr) by means of DV-Xα molecular orbital calculation. Our analysis revealed that the electronic configuration of the SuperAtom, which changed only the central atom, depends largely on the kind of doped atom. And we can also confirm the “SuperAtomic hybrid orbital” composed of SuperAtomic orbitals, and chalcogen characteristics.

Keywords
SuperAtom, SuperAtomic Hibrid Orbital

Topic
DV-Xa Method

Link: https://ifory.id/abstract/U8T6JGYCWK3w

Corresponding Author
Shuuichi Katumoto

Institutions
¹Department of Advanced Materials Science, Faculty of Engineering, Kagawa University,
²Department of Chemistry, Faculty of Science, Okayama University of Science
E-mail : s19g558[at]stu.kagawa-u.ac.jp

Abstract
Because of the chiral nature of the building blocks of living matter, an optical phenomena associated with the chirality constitute an important topic in physical chemistry. The specific optical rotation, which is a parameter for the characterization of the natural optical activity, depends strongly on the conformation of the molecule. In this study, we investigated the dependence of the optical rotation on a molecular conformation in the gas phase by calculating the electronic states of seven kind of chiral amino acids using the DV-Xα method. As a result, we can confirm the existence of an antibonding orbital on the side chain and the optical rotations are strongly related.

Keywords
Chiral Optical Rotation

Topic
DV-Xa Method

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

Corresponding Author
Takuhiro Yamamoto

Institutions
Department of Advanced Materials Science,
Graduate School of Engineering
Kagawa University

Abstract
The physical properties of metal complexes that are present in many places are due to the ligand field splitting of the d-orbital of the central metal ion, and the series representing the relationship of the ligand field splitting is called a spectrochemical series. This spectrochemical series represents the relationship of the ligand field splitting in the octahedral hexa-coordination structure, but no equivalent index has been shown in the tetrahedral four-coordination complex. In this study, we have investigated the creation of a novel spectrochemical series in tetrahedral four-coordinated metal complexes. As a result, it is possible to accurately understand the ligand field splitting of the tetrahedral four-coordinated metal complex, and to more effectively apply the energy for obtaining a spin crossover phenomenon in which the magnetic spin state reversibly changes. As a research flow, first, a tetrahedral structural model is created, and then the ligand field splitting is calculated using the DV-Xa method to create a spectrochemical series. As a result, we succeeded in creating a spectrochemical series of tetrahedral metal complexes. It has been found that the spectrochemical series of tetrahedral four-coordination complexes tend to hold as they are in octahedral hexa-coordination complexes to some extent, but there are cases where the series does not hold according to the peculiarity in the case of the four-coordinated metal complex.

Keywords
Spectrochemical Series, Four Coordination Complex

Topic
DV-Xa Method

Link: https://ifory.id/abstract/3m7w2c9UMHyQ

Corresponding Author
Yoshiki Fujikawa

Institutions
Department of Advanced Materials Science,
Graduate School of Engineering,
Kagawa University

Abstract
Metal complex indicates the significant physical properties such as magnetism, electrical conductivity and an optical property due to the electronic interaction between the ligand molecule and the central metal ion. We have evaluated the magnetism of the metal complex by controlling the ligand field splitting, which is the energy splitting of the d-orbitals. The magnetic phenomenon of such compounds are realized as a result of the electronic state based on the transition metal coordination complexes, and which can be switched between high spin (HS) and low spin (LS), that is called a spin-crossover (SCO) phenomenon. Our group have been investigated the way how to control the spin state according to the concept of a distortion. The five-coordinated metal complex ML5 has been experimentally confirmed to be a molecular distortion called the Berry pseudorotation (BPR). In the BPR process, both the axial and equatorial ligands can move at the same rate of increasing the angle between the other axial or equatorial ligands in five-coordinated metal complex. The classical BPR mechanism changes its molecular symmetry between two independent trigonal bipyramidals (TBPs) of D3h symmetry via a square pyramidal (SP) of C4v symmetry. The distortion parameters 5 are proposed in order to represent the distortion of the BPR process quantitatively. In this work, we predicted the possibility of the SCO phenomenon in intramolecular exchange mechanism through the BPR process in a five-coordinated metal complexes. 　

Keywords
Spin-crossover, Berry pseudorotation, Five-cooridnated Metal complexes

Topic
DV-Xa Method

Link: https://ifory.id/abstract/jQVuDGtFEhe6

Corresponding Author
Norito Taniguchi

Institutions
(1)Department of Advanced Materials Science, Faculty of Engineering. Kagawa University
(2)Department of Chemistry, Faculty of Science, Okayama University of Science

Abstract
Rare sugar is a monosaccharide that there are trace amounts in nature, natural sugars present in large amounts in nature is referred to as a natural monosaccharide. Recently, the isomerase called D-tagatose-3-epimerase (DTE) was discovered, and it has a possibility to synthesize quantity of the rare sugar from a natural sugar through the enzymatic reaction. And all of hexoses can be synthesized by four kinds of enzymatic reactions (oxidoreductase reaction, aldose isomerase reaction, aldose reductase reaction and DTE reaction). In this study, single-crystal X-ray structure analysis of a sugar alcohol and its derivative have been performed in order to determine the absolute coordinates of these sugar molecules. We give an electronic state calculation by means of the DV-Xα method using the obtained data of the absolute coordinates. We also consider that mechanism of the enzymatic reaction and intermolecular energy properly such as a hydrogen bond in order to synthesize the supramolecular rare sugars (SRSs) which can be controlled their structures and the hydrogen bonds.

Keywords
supramolecule rare sugar, hydrogen bond, D-tagatose-3-epimerase

Topic
DV-Xa Method

Link: https://ifory.id/abstract/8LMmpgJVcRDF

Corresponding Author
bambang sukamto

Institutions
Fakultas Hukum Universitas Islam Jakarta

Abstract
abstract The participation of the people in democracy era in Indonesia after the Presidential Election was seen to emerge and make noise, but the government did not take precautionary measures quickly. It is related to the 1945 Constitution article 28E paragraph (3) that states, "Everyone has the right to freedom of association, gather, and express opinions ". From the article the essence of the rights of every citizen express their opinions freely and responsibly in their shared lives. The phrase "responsibly" here gives an understanding that this freedom still has limits. With the study of juridical descriptions analyze the development of thinking that develops in the wider community in relation to the objectives of legal regulation. It is the right of every citizen to express their thoughts in writing and verbally freely and responsibly in accordance with the provisions of the applicable legislation. How the role of law enforcement is, without criminalization of law associated with the establishment of Coordinator Ministry of Politics, Law and Security of the State (Menkopolhukam) assistance.

Keywords
freedom, opinion, criminalization of law

Topic
Criminal Law

Link: https://ifory.id/abstract/W3GBnb6kYKRQ

Corresponding Author
Hamonangan Albariansyah

Institutions
Faculty of Law Universitas Indonesia
Gedung IASTH Lt.2, Jl. Salemba Raya No.4 Jakarta 10430

Abstract
The Ministry of Manpower in Indonesia recorded about 89,625 workplace accidents and 1,193 of them have caused deaths in the past five years. In that period, there were also 34,075 companies reported because of alleged criminal acts in the field of occupational safety and 2,074 cases had gone through the police investigation process but there are only 4 cases up to court decisions. During this time the practice of resolving work accident cases that resulted in death was carried out in two ways, namely the court line and the outside court. However, the outputs of the two methods of resolution are not oriented towards legal protection utilities for the recovery of victims and improvement of working conditions so that the incidence of deaths in workplace accidents can be prevented from happening again in the future. Therefore, this paper will analyze the law enforcement regulations relating to occupational safety for workers who are victims of workplace accidents and see the possibility of restorative justice can be applied to settle deaths in workplace accidents in Indonesia. This study uses a sociological juridical approach. The used sources and types of data come from field studies through interview and literature review. The results in this study are that there are no regulations that specifically regulate out-of-court settlement mechanisms for death cases in workplace accidents. Settlement of death cases through the judiciary does not provide recovery for victims and the improvement of unsafe working conditions for workers as a preventative measure, so that the deaths accidents in workplace does not happen again in the future. The conclusion in this study is that restorative justice can be developed as a way of resolving death cases in workplace accidents in Indonesia.

Keywords
Restorative Justice, Accidents Death, Industrial Relations, Misconduct

Topic
Criminal Law

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

Corresponding Author
Defri Aryu Dinata

Institutions
Faculty of Law, Borobudur University

Abstract
In medical society, there are controvery issues that called withholding and withdrawing life support. Withholding life support is delaying the provision of new or advanced life support therapy without stopping ongoing life support therapy, and withdrawing life support is stopping some or all of the life support therapy given to patients . This decision was not only decided based on medical aspects but also related to bioethics and medicolegal aspects. For medical practitioners, withholding and withdrawing life support are hard moral dilemmas to be implemented. From the medical aspect, withholding and withdrawing life support is not the same as euthanasia. There is a strong general consensus that withholding and withdrawing life support is a decision that allows the disease to progress naturally. This is not a decision to let the patient die, while euthanasia actively take patients at the end of their lives. In the bioetic aspect, doctors must respect the autonomy of patients and families in deciding the withholding and withdrawing life support. In medicolegal aspects, laws regarding withholding and withdrawing life support are regulated in the regulation of the Minister of Health No. 37 of 2014 chapter III where it is stated that the patients family can ask the doctor to withholding and withdrawing life support or ask to assess the patients condition to withholding and withdrawing life support. If there is a discrepancy between the familys request and the recommendations of the medical and ethical committee team, where the family continues to ask for a withholding and withdrawing life support, legal responsibility is with the family. Thus, according to what is regulated in the medical, bioethical and medicolegal aspects, doctors and ethical committee team cannot refuse requests to withholding and withdrawing life support.

Keywords
withholding life support, withdrawing life support, critically ill, end of life

Topic
Human Right Issues

Link: https://ifory.id/abstract/2bhjv8LqAzDp