Indonesia Conference Directory

Corresponding Author
Hotrimsyah Simbolon

Institutions
UNIMED

Abstract
This study was conducted for students in State High Schools throughout Central Tapanuli District with the aims were to find out: (1) the students scientific literacy skills; (2) the correlation between the parents formal educational background and students scientific literacy skills; (3) the correlation between the science learning intensity and students scientific literacy skills; and (4) the correlation between the science learning processes in schools and students scientific literacy skills. The population were all students of XI-Science Program in State Senior High Schools throughout Central Tapanuli District with the sample was taken randomly with 256 students. This type of research was descriptive correlative research. The research instruments were tests of students scientific literacy skills, and questionnaires of students scientific literacy factors, namely: the parents formal educational background, the learning science intensity, and the students science learning processes. Data analysis techniques used in this study included descriptive analysis and correlative analysis using multiple regression analysis at a significant level &

Keywords
Scientific Literacy, Parents Formal Education, Science Learning Intensity, Science Learning Process

Topic
Education and Research Global Issue

Link: https://ifory.id/abstract/Zt6wkbm9jc4y

Corresponding Author
Mery Silalahi

Institutions
Universitas Sari Mutiara Indonesia

Abstract
THE USE OF ANTI-LANGUAGE TO IMPROVE THE ABILITY OF ELEMENTARY STUDENTS OF GRADE 5 IN UNDERSTANDING THE ENGLISH GRAMMAR Mery Silalahi Universitas Sari Mutiara Indonesia mery.silalahi@yahoo.com ABSTRACT Learning English as a foreign language, making English lessons to be a difficult lesson to understand, coupled with grammar which is complicated and far different from our mother tongue, Indonesian language. The formulation patterns found in grammar usually must be memorized by students, but most students memorize only just to be able to answer the questions of the English lessons. Formulations on English grammar usually form a monotonous pattern that is difficult to memorize. The activity of changing the formulas found in English grammar into unique and funny words, sentences, and also abbreviations will form an anti-language that can be created by students in accordance with the creativity of each student. This study aims to study the anti-language influence on the ability of the elementary students of grade 5 in understanding English grammar. The population of this study is the elementary students of grade 5 SD Asisi Medan. This study will be an experimental study with a control group and intervention where the use of anti-language methods was conducted on the intervention group but in the control group will not be given any treatment. Data collection will use pretest and posttest which will be done to the intervention group and the control group. The data obtained were analyzed using univariate analysis and independent T-test.

Keywords
anti-language, English, grammar

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/fLHmZ3uaMj7q

Corresponding Author
Juni Triana Sitompul

Institutions
a) Instructional Technology, State University of Medan, Jalan William Iskandar Ps.V, Kenangan Baru, Kec Percut Sei Tuan, Kabupaten Deli Serdang, Sumatera Utara 20371
jujutriana[at]gmail.com
b) Faculty of Technic, State University of Medan

Abstract
This study aims to find out: (1) How the learning outcomes of science students learned by using the CLIL Learning approach and the learning outcomes of science students who are taught with Direct Learning Approach, (2) How do science learning outcomes between students with high levels of interest in learning and learning outcomes of students with low learning interest, (3) Is there an interaction between Learning approaches and Learning Interests in influencing science learning outcomes. This research was conducted at Medan Private Middle School consisting of Medan Private Kingston School Middle School, and Medan Private School Singapore Middle School. While the population for students is 292 students. School samples for the study are SMP Private Kingston School Medan Middle School Private Singapore School Medan. The research was placed in class VIII of Academic Year 2018/2019. For the study sample were 67 students, namely 34 students taught using the CLIL learning approach, and 33 students were taught using the Direct learning approach. The research method used quasi-experimental with 2 x 2 factorial design. The data analysis technique used was two-way ANOVA with a significance level &

Keywords
CLIL Learning Approach, Direct, and Learning Interest

Topic
Education and Research Global Issue

Link: https://ifory.id/abstract/8mDv3L6ytkbq

Corresponding Author
JONSON RAJAGUKGUK

Institutions
Universitas Negeri Medan

Abstract
Education is the only way to build national civilization towards progress in the midst of increasingly complex challenges. A nation can be innovative, creative, competitive depending on the quality of education managed by the country concerned. Amid the decentralization system, a number of authorities are owned by the Provincial Government and the District Government. How the Provincial Government and District Government are able to manage education in terms of educational autonomy is certainly a discussion. This means that education management or education management will certainly be practiced by the Provincial government and the District Government. For this reason, it is time for quality education management concepts to be understood by the Provincial Government and District Government as a process. Management of quality education, measurable, will be able to make education a good process for building national civilization and humanizing human beings well and systematically. Through good management of education the impact of education as a process in building strong and directed character will be felt. For this reason, the Governor, the Regent must understand well the nature, urgency and management process of good and right education in order to produce human resources in the current era of regional autonomy.

Keywords
Management of education, regional autonomy, and education autonomy

Topic
Educational Policy and Administration Education

Link: https://ifory.id/abstract/c7MuwhmFX9jk

Corresponding Author
Inne Marthyane Pratiwi

Institutions
a) Universitas Islam Negeri Sunan Gunung Djati
Jalan A.H. Nasution No. 105, Bandung, Jawa Barat, Indonesia
b) SDN Bantarmangu 01
Jalan Gunungtiga, Cimanggu, Cilacap, Jawa Tengah, Indonesia

Abstract
Numeracy literacy deals with the application of mathematical concepts in daily life. In this study, the worksheets are designed to present mathematical concepts in daily life by using story problem. Students are presumed to be able to solve story problem if they can understand the meaning of the problem. Thus, students can find problem that need to be solved in the right way. This study aims to investigate the correlation between mathematical understanding skill with reading comprehension skill of elementary school students. The study implemented the correlation method by involving 4th grade students in two elementary schools. Data collection techniques used technical tests. Then, the data is analyzed by simple regression test. The result of the study shows that there is a positive correlation between mathematical understanding skill with reading comprehension skill of elementary school students. The students not only understand mathematical concept and gain reading comprehension skill but also know about Indonesian local wisdom. This is due to the concept of story problem integrated with local wisdom material.

Keywords
local wisdom, mathematical understanding, reading comprehension, story problem

Topic
Mathematics Education

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

Corresponding Author
Safira Permata Dewi

Institutions
a) Pendidikan Biologi, FKIP Universitas Sriwijaya, Jl. Raya Palembang-Prabumulih Km. 32 Ogan Ilir, Indonesia
*saphire2687[at]gmail.com

b)Pendidikan Kimia, FKIP Universitas Sriwijaya, Jl. Raya Palembang-Prabumulih Km. 32 Ogan Ilir, Indonesia

Abstract
This study aims to get an overview of the implementation of lectures in General Biology in the Chemistry Education FKIP Unsri. The sample of this study was Chemistry Education students in the 2018/2019 academic year (n = 43). The instruments used were documentation studies to find out the achievements of students in general Biology courses and survey questionnaires to find out the concepts that were considered the most difficult, the causes of difficulties understanding the concepts, and the interest of students in the quiz held before learning. The data shows that the achievement of student learning results shows 57.45% of students are still in the "C" and "D" assessment categories. Meanwhile, the concept of human physiology (41.86%) and cells (structure, metabolism, and reproduction) (39.53%) is the most difficult concept for students to understand. The difficulty of understanding this concept is due to the large number of uses of terminology (72.1%) and the weakness of students initial knowledge from previous levels of education (51.2%). These findings indicate the importance of diagnostic tests before the lecture is done so that the lecturer knows more about the weaknesses and strengths possessed by students so that the lectures that take place become more directed.

Keywords
course profile, general biology, chemistry education, sriwijaya university

Topic
Biology Education

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

Corresponding Author
Adib Rifqi Setiawan

Institutions
Madrasah Tasywiquth Thullab Salafiyyah (TBS), KH. Turaichan Adjhuri No.23, Kudus, 59315, Indonesia

Abstract
Scientific literacy indicates that science has value outside scientific practice. This idea and reality is hardly modern, although we lose sight of this history. Unfortunately, PISA study at 1999-2015 and several works on that periods, has shows that common science teachings dont optimally guide students to achieve scientific literacy. As matter of fact, the answer to what is best teaching method to achieve scientific literacy has not been obtained yet. By proposing this work, we are consider that scientific approaches to teaching encompass a range of models as alternatives to guide students on achieve scientific literacy. This work constructs lesson plan for guide students on achieve scientific literacy in ecology learning, used R&D approach four-D model that reduced into three stages: define, design, and develop. It gained lesson plan, students worksheets, also scientific literacy test as well, that validated by experts and practitioners and reliability counted based on test. The final test of any teaching methods lies, of course, in implementation. The implementation of this work is yet to do.

Keywords
ecology learning, lesson plan, scientific literacy, scientific literacy test, students worksheets

Topic
Biology Education

Link: https://ifory.id/abstract/ybtvKgG6wmYn

Corresponding Author
Adib Rifqi Setiawan

Institutions
Madrasah Tasywiquth Thullab Salafiyyah (TBS), KH. Turaichan Adjhuri No.23, Kudus, 59315, Indonesia

Abstract
STEM that an acronym for science, technology, engineering, and mathematics defined as the integration of science, technology, engineering, and mathematics into a new cross-disciplinary subject in schools. We dont deny that the concept of integrating subjects to teach science in Indonesian schools, generally is not new and has not been very successful in the past. In addition, some people consider STEM as an opportunity while others view it as having problems. However, the answer to how STEM education implementation has not been studied yet comprehensively. Therefore, STEM education-s lesson plans is very important to be designed then implemented. This work designed STEM education-s lesson plan on topics of ecosystem, used R&D approach four-D model that reduced into three stage: define, design, and develop. This work is non-implementation throughtout.

Keywords
STEM education, lesson plan

Topic
STEM Education

Link: https://ifory.id/abstract/B2TvE7tmXf6p

Corresponding Author
Yusuf Wibisono

Institutions
1Bioprocess Engineering, Univ. of Brawijaya, Jl. Veteran No.1 Malang 65145,
Indonesia
2Agriculture Engineering, Univ. of Brawijaya, Jl. Veteran No.1 Malang 65145,
Indonesia
3MILI Water Research Institute, PO Box 301 ML, Malang 65101,
Indonesia

Abstract
ZA (ammonium sulfate) and NPK (nitrogen-phosphorus-potassium compound) are nitrogen-rich fertilizers commonly used by farmers. The fertilizers have high solubility in water, decay rapidly in wet soil and decompose into ammonia. Its lead into eutrophication phenomena and its absorption by crop roots becomes less effective. A facile and scalable method is developed to hybrid fish scale based powdered hydroxyapatite with nitrogen-rich compounds for slow-release fertilizer. Hydroxyapatite (HAp) is a material that contains phosphorus and is a well-binding agent of nitrogen. This study is aiming at synthesizing HAp from calcium-rich fish scale biowaste using wet-chemical precipitation method and coated the HAp particles with ZA and NPK fertilizer. From the experiment, the total nitrogen content of ZA is 26,95% and NPK is 16,46%. The hybrid ratio is 6:1, and nitrogen release is tested every 120 seconds using percolation method. The percolate contents analyzed using Kjehdahl methods. The nitrogen release of the hybrids is compared to obtain the best kinetics model i.e. zero order kinetics, 1st order kinetics, Higuchi model and Kosmeyer-Peppas models and to analyze sorption isotherm by using BET (Brunauer-Emmett-Teller) method. The use of hydroxyapatite-based slow release fertilizer, might prevent the water resources from fertilizer contamination as well as enhance the crop production using more efficient crop irrigation.

Keywords
hydroxyapatite, kinetic, nitrogen, slow release, fertilizer

Topic
AGRICULTURAL ENGINEERING

Link: https://ifory.id/abstract/9gGUDu7tYMvE

Corresponding Author
Yusuf Wibisono

Institutions
1Master Program of Agriculture Engineering, Univ. of Brawijaya, Jl. Veteran No.1 Malang 65145, Indonesia
2Bioprocess Engineering, Univ. of Brawijaya, Jl. Veteran No.1 Malang 65145,
Indonesia
3MILI Water Research Institute, PO Box 301 ML, Malang 65101, Indonesia

Abstract
. The abundance of agricultural crop waste biomass gained attention as it could be converted into a more useful chemicals. Cocoa pod husks (CPH) is a waste of cocoa plantation, contains phenolic compounds which can be used as antibacterial ingredients. Phenolic compounds in CPH include phenolic acids, flavonoids and flavones. This study is aiming at evaluating antibacterial activity of CPH phenolic extracts, by using Microwave-Assisted Extraction (MAE) method. Extraction was done using 96% ethanol as solvent and combination of biomass and solvent ratio of 1:4, 1:6 and 1:8 m/v, respectively, with microwave targeted extraction time of 2, 3 and 4 minutes, respectively. The extraction results with the highest total phenolic content were tested againts Escherichia coli activity using a disk diffusion method at an extract concentration of 5; 7.5; 10 and 15 mg/ml, respectively. The highest total phenolic content of 453 mg GAE/g dry extract was obtained from MAE treatment with biomass/solvent ratio of 1:4 (m/v) for 4 minutes. The results of the antibacterial activity of extracts against Escherichia coli showed that inhibitory zones had formed at a concentration of 5 mg/ml. The width of the inhibition zone increases as the concentration of extract increases. Antibacterial activity of CPH phenolic extract can be used for food processing, such as utilizing as fillers in a mixed matrix membranes for juice clarification.

Keywords
cocoa pod husk, extract, phenolic content, antibacterial activity, Escherichia coli

Topic
AGRICULTURAL ENGINEERING

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

Corresponding Author
aulia nur mustaqiman

Institutions
Universitas Brawijaya

Abstract
Malang City has already known as one of the most tourism city in East Java. This city is also known as education city that has attracted a lot of teenager to study in East Java. As a city that has densely population , There are high number of people activities and building in Malang. Many building in this city may occurs high risk of fire hazard that probably ruin the environment. Therefore, mapping is the first important thing to do as fires mitigation to reduce and prevent fire hazard in Malang City. Some factors that may trigger the fire in this city are type of activites, construction material, building density, road accessibility, Total of Fire Trucks, and accessibility of hydran as water source. Those main factors are becoming background of this research. The method that used to determine zones and early prevention are using quatitative method by using scoring (1-4) and spatial analysis based on updated ArcGIS version 10.4 which is used to mapping and overlay. The first step is dividing all of area in Malang City into 3 (three) maps. The maps are people activities map, malang Contruction Type Map, and Road Access Map. The next step is determining each zone in malang City that will be used to overlay. The result of this research shows that the combined map of Malang City are divided into 3 (three) zones. The first zone is area that has low risk of fire hazard. The second zone is area that has middle risk of fire hazard. The last, The third zone is area that has high risk of fire hazard.

Keywords
Fire, Mapping, Malang

Topic
WASTE AND ENVIRONMENTAL MANAGEMENT

Link: https://ifory.id/abstract/9vF6nbAgNMuB

Corresponding Author
Tiara Isfiaty

Institutions
UNIKOM

Abstract
This paper reports my in-depth literature study and observation on digitarian generation as a dominance culture actors in the present time. This millenial generation has a great dependence on digital technology. In fact, digital technology innovation have a tremendous role to the formation on the pattern of life and mindset in present society. The fact leads us to another fact on the emergence of vocaloid phenomenon as the implication of the rapid growth of digital technology which is now becoming a major breakthrough in the creative industry area at almost all countries in the world. By utilizing the innovation of 3D Hologram technology, Japanese creative industry succeeds in creating a digital woman figure named Hatsune Miku as the second most popular vocaloid generation in the world. In this article, Hatsune Miku ,the vocaloid, is an interesting cultural phenomenon to be observed from the tendency of the increasingly solid status of digitarian society as a spectacle society, with the activity of seeing and being seen as its superior character. This condition is interesting to review based on the theory of cultural transformation, especially the problem of body image.

Keywords
digitarian, cultural transformation, body image, spectacle society

Topic
Visual Communication Design and Interior Design

Link: https://ifory.id/abstract/8demgkLzn4HD

Corresponding Author
Erwin Harahap

Institutions
a) Department of Mathematics, Universitas Islam Bandung
Jalan Tamansari No. 1 Bandung 40116, Indonesia.

b) Department of Statistics, Universitas Islam Bandung
Jalan Tamansari No. 1 Bandung 40116, Indonesia.

Abstract
Traffic is a very vital medium for various means of land transportation that connects various locations and even large cities. The smooth traffic of a city is one of the performance parameters of the local government. Furthermore, the smooth traffic determines the great development of economic, social, educational and technology. As the increasing level of civilization development and also the population, traffic becomes more congested and becomes a big problem that is very difficult to avoid. In this study, we proposed a traffic simulator system LINTAS-BD 1.2, or commonly called as "LINTAS" which served as a tool to solve traffic congestion problems. Various methods and traffic engineering designs can be simulated first through the LINTAS system, before they are actually implemented on the road. The benefit of the LINTAS is to evaluate and simulate traffic conditions based on the design of a particular method or traffic engineering. Furthermore, through simulations, it can be known and tested analytically about the level of accuracy, efficiency, and effectiveness of the method and design. Through the simulation, the most appropriate traffic management method can be found, so that the problem of traffic congestion can be solved. The model and the design system of LINTAS is the arrangement and integration of various blocks or modules included: roads, traffic light, arrival of vehicles, queues, servers, and various obstacles such as intersections, terminals, markets, branches, etc. These various blocks are then combined into a single unit application as a simulator. The objective of this research is to compile a simulation application (traffic simulator) that can be used as a tool to accurately predict traffic situations, and as a medium for testing traffic engineering. The LINTAS simulator is created using the SimEvents toolbox and runs on the MATLAB-Simulink software. The LINTAS system is compiled based on Mathematics, specifically the Queueing Theory.

Keywords
traffic, congestion, simulation, queuing networks, simevents-matlab

Topic
Applied Mathematics

Link: https://ifory.id/abstract/DUuP84k26rJ3

Corresponding Author
KAFURTA SUTAARGA

Institutions
STISIP Setia Budhi Rangkas Bitung

Abstract
This research is to find out the application of Corruption Crimes committed by the Defendant in collecting from the Social Assistance Fund at the Ministry of Education and Culture according to Decision No. 25/Pid.Sus/2017/PN.SRG. This study uses Juridical-Empirical Research method, namely research that uses two ways, namely library research and field research, and data collection techniques used, namely data that has been collected both primary data sources and secondary data sources. The results of this study Defendants were proven to have violated Pasal 2 ayat 1 Jo Pasal 18 Undang-Undang Nomor 31 Tahun 1999 as amended by Undang-Undang Nomor 20 tahun 2001 as amended by Act Number 20 of 2001 concerning Eradication of Corruption Crime Jo Pasal 55 ayat 1 ke-1 KUHP is cut/collect social assistance funds from recipients of social assistance on the grounds that there are fees paid to the center and the social assistance funds that are deducted/collected will be distributed again to the central person or the Indonesian Ministry of Education and Culture who manages the search for social assistance, Technical Guidelines for Distribution of Social Assistance in 2015 in Chapter V concerning Supervision and Complaints in Point B concerning Complaints in the Contents "To Obtain No Social Assistance Funds Charged by Anyone" and Article 4 paragraph 6 Republic of Indonesia Minister of Finance Regulation Number 81/PMK.05/2012 which contains "Social assistance provided by the Social Assistance Giver is not to be taken by the Provider of social assistance. The Defendants act has benefited the Defendant and has caused State Finance losses of 230,354,000 (two hundred thirty million Three hundred fifty four thousand rupiahs) and the Corruption Courts decision at the Serang District Court the defendant was sentenced to 2 (two) years prison is lighter than the prosecutors demands, namely 4 (four) years in prison;

Keywords
Corruption, Collection

Topic
Corruption and Clientelism

Link: https://ifory.id/abstract/QmCzTtP3agd7

Corresponding Author
Pitria Susanti

Institutions
IKIP Siliwangi Bandung

Abstract
This research is a Classroom Action Research (CAR) which is conducted in three cycles, each cycle is held 2 x meetings, and each cycle is carried out 5 x 40 minutes. The purpose of this study was to improve mathematical communication skills and learning activities of class VIII students of Tarogong Kaler 2 Junior High School in the material of Flat-Side Building through efforts to improve actions taken from cycle to cycle. The subjects in this study were eighth-grade students of Tarogong Kaler 2 Junior High School 2 semester of the academic year 2018 - 2019 which numbered 34 people. Data collection techniques in classroom action research are observations of students mathematics learning activities, the value of learning outcomes, obtained from the students final tests conducted at the end of each cycle, interviews, and documentation. The data in this study used a mathematical communication test each cycle and analyzed using quantitative and qualitative. For quantitative analysis, descriptive statistics are used to describe mathematical communication skills in solving mathematical communication problems after learning, which consist of mean, range, maximum value and minimum value and the percentage of mastery learning obtained students in each cycle. Data from observations of student mathematics learning activities and interviews were analyzed qualitatively. The results of this study reveal that mathematical communication skills and learning activities of class VIII students of Tarogong Kaler 2 Junior High School in the Flat-Build Space material experienced an increase from cycle to cycle through efforts to improve actions taken.

Keywords
Mathematical Communication Ability, Student Learning Activities, Build Flat-Side Space.

Topic
Mathematics Education

Link: https://ifory.id/abstract/UcbT8GM9Fnmt

Corresponding Author
Resnawati Resnawati

Institutions
Ikip Siliwangi Bandung

Abstract
The purpose of this study was to improve the mathematical problem solving abilities of class VIII G students of Tarogong Kidul 3 Junior High School in the material of Building Flat-Side Space. This study was a Classroom Action Research (CAR), which was conducted in 3 cycles and each cycle was held twice. Each cycle follows the stages: planning, action, observation / evaluation and reflection. The instruments used in this study include tests of mathematical problem-solving abilities, observation sheets of student activities, field notes and interviews. The results showed that the mathematical problem solving ability had increased from cycle I to cycle III, the average percentage of mastery of students mathematical problem solving abilities reached more than 65%. Judging from the average learning outcomes also increased from cycle I to cycle III. In the first cycle an average of 62.33, the second cycle averaged 66.83 and the third cycle averaged 68.33, while the percentage of students who reached KKM was 40% in the first cycle, 56.67% in the second cycle and 83 , 33%.

Keywords
Keywords: Mathematical Problem Solving, Building Flat-Side Space and Learning Outcomes

Topic
Mathematics Education

Link: https://ifory.id/abstract/yAb8FBft2ZVN

Corresponding Author
Yanti Yulianti

Institutions
IKIP Siliwangi Bandung

Abstract
This research is a Classroom Action Research (CAR) which is conducted in three cycles, each cycle is held 2 x meetings, and each cycle is carried out 5 x 40 minutes. The purpose of this study was to improve mathematical reasoning abilities and learning activities of class VII students of Tarogong Kidul 3 Junior High School on Quadrangle and Triangle material through efforts to improve actions taken from cycle to cycle. The subjects in this study were seventh-grade students of Tarogong Kidul Junior High School 3 in even semester of the school year 2018 - 2019 which numbered 32 people. Data collection techniques in classroom action research are observations of students mathematics learning activities, the value of learning outcomes, obtained from the students final tests conducted at the end of each cycle, interviews, and documentation. The data in this study used mathematical reasoning tests for each cycle and were analyzed using qualitative. For analysis used descriptive statistics to describe mathematical communication skills in solving mathematical communication problems after learning, and the percentage of mastery learning obtained by students in each cycle. Data from observations of student mathematics learning activities and interviews were analyzed qualitatively. The results of this study reveal that mathematical reasoning abilities and learning activities of class VII students of Tarogong Kidul Junior High School 3 in Quadrangle and Triangle material have increased from cycle to cycle through efforts to improve actions taken.

Keywords
Mathematical Reasoning Ability, Student Learning Activity, Quadrangle and Triangle

Topic
Mathematics Education

Link: https://ifory.id/abstract/zm3746H2NrBy

Corresponding Author
Gisti Helviyana

Institutions
Sriwijaya University

Abstract
This study was purposed to describe problems used to measure mathematical thinking aspect reasoning for senior high school students in topic sequences and series.The indicators used to measure mathematical thinking aspect reasoning are inductive, deductive, and logical analysis.This is design research consisting: preliminary design, focus group discussions, trials, observation and interview, and retrospective analysis.The subjects of this study were 3 senior high school students from grade 11 who were taken randomly.There are three problem-solving questions used in this study. The data analysis used qualitative technique.As the result of this study, for questions number 1 and 3, all three students were able to do deductively and logic analysis and make conclusions correctly. the three students can do deductively and logic analysis in question number 2, only students 3 in solving the correct questions and conclusions, while students 1 and 2 are less precise in their conclusions. for inductive reasoning indicators have not yet emerged from the three students.

Keywords
Mathematical Thinking, Problem-solving question, Reasoning

Topic
Mathematics Education

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

Corresponding Author
Redi Hermanto

Institutions
(a) Universitas Siliwangi, Jl. Siliwangi No. 24, Tasikmalaya, Indonesia
(b) Universitas Pendidikan Indonesia, Jl. Setiabudi No. 229, Bandung, Indonesia

Abstract
Ethnomathematics is a study that observes how certain society groups understand, articulate, and use mathematical concepts or ideas in their lives. The indigenous people of Kampung Naga have a diversity of cultures, traditions, and value systems that are still well cared and maintained until to day. This cultural activity is patterned, structured, and has a form in daily life and has become a belief that is embedded in the form of local wisdom. This study aims to explore the concept of ethnomathematics that emerged and was pragmatically involved in the daily life activities of the Kampung Naga indigenous people based on a review of aspects of mathematics. This research is a qualitative study using ethnographic models.

Keywords
Ethnomathematics, Lokal Wisdom, Kampung Naga

Topic
Mathematics Education

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

Corresponding Author
Mellyana Mellyana

Institutions
IKIP Siliwangi Bandung

Abstract
This research is a Classroom Action Research (CAR) which is carried out with three cycles, each cycle is held 2 x meetings, and each cycle is carried out 4 x 45 minutes. The purpose of this study was to improve mathematical problem solving and learning activities of Social Sciences class X students of SMA 8 Garut on Trigonometry material through efforts to improve actions taken from cycle to cycle. The subjects in this study were students of class X IPS in SMA 8 Garut even semester of the school year 2018 - 2019 which numbered 32 people. Data collection techniques in classroom action research are observations of students mathematics learning activities, the value of learning outcomes, obtained from the students final tests conducted at the end of each cycle, interviews, and documentation. The data in this study used a mathematical problem-solving test for each cycle and analyzed using qualitative. Descriptive statistics are used for analysis to describe mathematical communication skills in solving mathematical problem-solving questions after learning, and the percentage of mastery learning obtained by students in each cycle. Data from observations of student mathematics learning activities and interviews were analyzed qualitatively. The results of this study reveal that mathematical problem solving and learning activities of Social Sciences class X students of SMA 8 Garut in Trigonometry material have increased from cycle to cycle through efforts to improve the actions taken.

Keywords
Mathematical Problem Solving Ability, Student Learning Activities, Trigonometry.

Topic
Mathematics Education

Link: https://ifory.id/abstract/V4qTUdZYP8QJ

Corresponding Author
Yuyun Hermansyah

Institutions
IKIP Siliwangi Bandung

Abstract
Mathematics is one of the subjects that must be taught in school, of course, has an important role in achieving the educational goals mandated by the Law, namely to equip students with logical, analytical, systematic, critical, and creative thinking. Therefore, teachers are required to be able to use learning models so that the material is easily understood or understood by students. This study aims to determine the increase in mathematics learning activities and results of class VII students through the ability of understanding through an inductive approach at Samarang Garut Muslim Middle School with research subjects of class VII students with 30 students consisting of 14 male students and 16 female students. The research subjects were taken randomly. The procedure for implementing the action is a cycle consisting of 4 (four) stages, namely: 1). Planning, 2) Implementation, 3) observation, and 4). Reflection. Data collection is done by observation and evaluation/testing. Activity observation results show that there is an increase in each cycle. Likewise with learning outcomes in each cycle has increased.

Keywords
mathematical understanding ability, Student Learning Activity, Inductive Aprouch

Topic
Mathematics Education

Link: https://ifory.id/abstract/dEk4TDgJLwuR

Corresponding Author
Tita Susilawati

Institutions
IKIP SILIWANGI

Abstract
As is known, mathematics is a subject that is considered difficult for students to learn and difficult to teach by teachers. Some teachers recognize this, so mathematics becomes a scary lesson and makes students lose interest and lazy learning, for various reasons. One reason is that mathematics is difficult to understand because the object of the material is abstract. For that the real world in the student environment as a concrete object of the problems faced by students must be raised in mathematics learning, not just an abstract concept. To respond to the above, the researchers tried to find a solution by applying a cooperative type jigsaw method to Improve Learning Outcomes, Students interest and creativity in the Limit Subject Function. The problems that the researchers revealed were: 1) Can the Jigsaw method increase student activity and creativity in learning on the subject of Function Limit in class XI IPS-1 Garut 2 High School Academic Year 2018/2019? 2) Can the Jigsaw method improve student learning outcomes classically on the subject of Limit Functions in the XI IPS-1 class of Garut 2 Public High School Academic Year 2018/2019? 3) What is the impact of the Jigsaw method in increasing student learning interest on the subject of Limit Function in class XI IPS-1 Garut 2 High School Academic Year 2018/2019? The method used in this study is the test method, questionnaire, and observation with data analysis techniques, namely descriptive analysis. The results that the researchers got were: 1) The Jigsaw method can increase student activity by 20% and activity to record lessons increased by 21%. 2) The Jigsaw Method can improve student learning outcomes in a classical manner by 7.68%, and an increase of 38.26% from pre PTK to post PTK. 3) The Jigsaw Method can increase student interest by 4.16% from pre PTK to post PTK.

Keywords
Understanding critical thinking, JIGSAW approach.

Topic
Mathematics Education

Link: https://ifory.id/abstract/W3N74mgQnrh9

Corresponding Author
Muchamad Ocky Bayu Nugroho

Institutions
UPN Veteran Yogyakarta

Abstract
The Prambanan and its surrounding area is rich in the ancient relics of Buddhist and Hindu culture, in the form of temples or other forms of heritage. When was observed the distribution of the ancient buildings in this area form a specified pattern, which tends to round or close to the Boko Hills and usually were built on the riverbank. Based on the geological idea, it can be interpreted that the spread of these buildings is influenced by the procurement of source material for its. The Boko Hills composed of polimict breccias; lapilli breccias; pebbly sandstones; tuffaceous sandstones and siltstones, is the nearest location where the materials of the temple was taken, in addition to the rivers that supply the igneous andesite as a product of Merapi-s volcanism. Tuffaceous sandstones; pebbly sandstones and lapilli breccias of the Boko Hill are used for stuffing materials, such as flooring, wall around the temple and small statues. Andesite is used for the main temple building materials, such as walls, walkways and large statues. Key words : Boko Hill, source materials, ancient Hindu and Budha temples

Keywords
Boko Hill, source materials, ancient Hindu and Budha temples

Topic
Geology

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

Corresponding Author
Purnomo Purnomo

Institutions
(a) Dept. of Mechanical Engineering, Universitas Muhammadiyah Semarang, Indonesia
* purnomo[at]unimus.ac.id
(b) Dept. of Mechanical Engineering, Brawijaya University, Malang, Indonesia

Abstract
Mechanical failure of zeolite-HDPE material applied to skull bone implants is a material fracture that cannot be controlled. An important step to minimize failure due to fracture is to understand the fracture characteristics indicated by the propagation path pattern. This study aims to investigate the fracture propagation pathways in quasi-static conditions. Injection-molded zeolite-HDPE composites were placed in an environment of ultraviolet (UV) radiation for 200 hours at atmospheric pressure. UV-irradiated Double-edge cracked zeolite-HDPE composite was tested in mode I in a universal testing machine (UTM) with a crosshead speed of 2 mm/min at a constant room temperature of approximately 25oC. The stress and elongation were registered by the UTM. During loading, the evolution of cracks in the ligament length region was recorded with the camera so that the crack propagation pathway until the total fracture occurs can be clearly observed. The results show that the crack propagation pathways pattern were not all straight and parallel to the ligament length. They are also found in a deviant state of the ligament length line by forming an angle &

Keywords
patway, fracture, propagation, double-edge-cracked

Topic
Smart materials

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

Corresponding Author
SUKMAWATI SAFITRI DEWI

Institutions
MAGISTER MANAGEMENT - UNIVERSITAS AIRLANGGA

Abstract
The manufacturing company is one of the companies which have a fairly big impact on the pollution as well as waste problems which are produced from the company-s operational activities. This research is meant to analyze the influence of company characteristic to the corporate social responsibility disclosure at the manufacturing companies which are listed in the Indonesia Stock Exchange (IDX). The company characteristics consist of size, profitability, leverage, management ownership, and the number of the board of commissioners. The purposive sampling method is used as the sample collection technique which are listed in the Indonesia Stock Exchange (IDX) and ICMD and are consecutively in the IDX website during the year 2009-2011. As much as 34 companies from 143 fulfill the criteria of determined samples research. The multiple linear regressions analysis is conducted by using hypothesis test as well as statistic analysis which is the F statistic test and t statistic test with the assistance of SPSS 16.0 for windows. The result of this research indicates that simultaneously size, profitability, leverage, management ownership and of the number of board of commissioners- variables have an influence to the corporate social responsibility disclosure. Parcially size, management ownership and of the number of board of commissioners- variable have an influence to the corporate social responsibility disclosure, while the profitability and leverage have no influence to the corporate social responsibility disclosure.

Keywords
Size, Profitability, Leverage, Management Ownership, Size of the Board of Commissioners, Corporate Social Responsibility Disclosure

Topic
Environmental Impact Assessment

Link: https://ifory.id/abstract/9uPFcHp2qYbV

Corresponding Author
JOKO SUYONO

Institutions
1) Doctoral Candidate in Management Science, Faculty of Economics and Business, Universitas Airlangga, Surabaya, Indonesia.
2) Lecturer Faculty of Economics and Business, Universitas Airlangga, Surabaya, Indonesia.
3) Bachelor Alumni in Management, Faculty of Economics and Business, Universitas Airlangga, Surabaya, Indonesia

Abstract
This study took the object of Zainuddin elementary school in the Sidoarjo Regency, Indonesia by raising the issue of affective commitment influenced by transformational leadership and mediated by inclusive organizational culture. The analytical method used in this study is SEM-PLS where the main function is to examine the influence of independent variables on the dependent variable and intervening variables on the dependent variable, namely the effect of transformational leadership on affective commitment mediated by inclusive organizational culture. Population and sample taken as many as 45 teachers, total teachers of the organization. The technique used is census, which is used to determine the number of respondents. The results of this study indicate that there is a direct influence of transformational leadership on affective commitment. The test results also showed the significance of inclusive organizational culture as a mediation between the effect of transformational leadership on affective commitment.

Keywords
transformational leadership; affective commitment; inclusive organizational culture

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/P68DHC3mvUyu

Corresponding Author
Anik Herminingsih

Institutions
Management Program of Economics and Business Faculty
Universitas Mercu Buana Jakarta

Abstract
This study aims to determine the effect of compensation, organizational culture, and working environment on employee performance. Respondents in this study are 107 employees of PT. Sinar Sentra Cipta. Data was collected directly from respondents using research instruments in the form of questionnaires and technical data analysis using SPSS Ver 24 software. The results of this study indicate that compensation has a positive effect on employee performance, organizational culture has a positive effect on employee performance, the work environment has a positive effect on employee performance. As well as compensation, organizational culture, and working environment simultaneously affect the employee performance. The most influential variable on the employee performance is compensation.

Keywords
Compensation, Organizational Culture, Work Environment, and Employee Performance

Topic
Human Resource Management

Link: https://ifory.id/abstract/DcL63FVteYxP

Corresponding Author
JOKO SUYONO

Institutions
1) Doctoral Candidate in Management Science, Faculty of Economics and Business, Universitas Airlangga, Surabaya, Indonesia.
2) Lecturer Faculty of Economics and Business, Universitas Airlangga, Surabaya, Indonesia.

(jk_suyono[at]yahoo.com, anis.eliyana[at]feb.unair.ac.id)

Abstract
This study aims to determine the effect of job rotation on talent development, the effect of job assignment on talent development, the effect of mentoring on talent development in the Regional Water Supply Company (PDAM) Sidoarjo, Indonesia. And to find out the simultaneous influence between job rotation, job assignment and mentoring on talent development for PDAM Sidoarjo employees. The population in this study was 580 employees of PDAM Sidoarjo. While the sample of this study is 85 employees of PDAM Sidoarjo which is calculated by Slovin formula. Data analysis was performed by multiple linear regression analysis. The results of the study show that job rotation influences talent development, job assignments affect talent development, mentoring influences the talent development of PDAM Sidoarjo, Indonesia. The results of the study also show that job rotation, job assignments, mentoring simultaneously influence the talent development of PDAM Sidoarjo, Indonesia.

Keywords
job rotation; job assignment; mentoring; talent development program

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/guQLA4TWjrvd

Corresponding Author
Anik Herminingsih

Institutions
Management Program of Economics and Business Faculty
Universitas Mercu Buana Jakarta

Abstract
The research was conducted to analyze the influence of transformational leadership, organizational commitment and job insecurity on work performance of outsourcing employees. The research conducted to the total respondents of 80 employees of customer operations of PT. Indosat Tbk. Data were collected using questionnaire with Likert scale measurement. Data analyzed using multiple regression model and processed with spss 21. The result of the study shows that transformational leadership, organizational commitment and job insecurity significantly influence the employee performance both partially and individually. Transformational leadership and organizational commitment have positive effects on employee performance, but job insecurity has negative and significantly impact on employee performance.

Keywords
transformational leadership, organizational commitment, job insecurity, work performance

Topic
Human Resource Management

Link: https://ifory.id/abstract/qgDjf4dRNvpC

Corresponding Author
Abdul Gani

Institutions
Universitas Mercu Buana

Abstract
This study aims to determine the effect of skills, knowledge and attitudes on the performance of UPTP I Ministry of Trade. The method used in this research is descriptive method. The object of this research is business actors capable of being served by UPTP I Ministry of Trade with a population of 135 people. The method used to determine the number of samples using Slovin formula with a sample of 101 people. The data analysis method used is statistical analysis in the form of multiple linear regression test using IBM Statistical Package for Social Science (SPSS) version 20. The results of this study indicate that the skills have a positive and significant impact on the performance of UPTP I Ministry of Trade, knowledge have a positive and significant impact on the performance of UPTP I Ministry of Trade and attitudes have a positive and significant impact on the performance of UPTP I Ministry of Trade

Keywords
Skills, Knowledge, Attitude, Performance

Topic
Human Resource Management

Link: https://ifory.id/abstract/FZR4AwcBNLhE