Indonesia Conference Directory

Corresponding Author
suci siti lathifah

Institutions
Program Studi Pendidikan Biologi
Fakultas Keguruan Dan Ilmu Pendidikan Universitas Pakuan

Abstract
Quasi experiment method with pre- experimental, one group pretest-posttest design is used in this research. The research was conducted from March to June 2019 and aimed at finding out students- cognitive achievement on vertebrate learning material before and after using mind mapping. Population in this research is students of tenth grade MIPA in SMA Negeri 1 Cigombong academic year 2018/2019, with 32 students as experimental group. Data collection techniques used is multiple choice questions to find out students- achievement and questionnaire to measure response towards teaching learning process. The N-gain score for pretest and postest shows medium criteria of 56%. The average result of Pretest before using mind mapping learning material is 47 with cognitive achievement category considers as low. The average result of posttest after using mind mapping learning material is 77 with cognitive achievement category listed as good. On the other hands, teachers- response towards mind mapping learning material is positive, it can be seen from the result of the questionnaire score 94,3%. While students- response is 78% like the teaching learning process using picture media and 63% students like the use of group work, 66% students felt bored with identical learning source. It can be concluded that mind mapping learning material is effective in improving students- cognitive achievement.

Keywords
Learning Material, Cognitive Learning Achievement, Mind Mapping, Vertebrate

Topic
Biology Education

Link: https://ifory.id/abstract/k2aT3cMyQ8h7

Corresponding Author
Annisa Puji Astuti

Institutions
Program Studi Pascasarjana Pendidikan IPA, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia

Abstract
This study aimed to determine student ability to write scientific articles based on the results of an inventory of animal species from the Lacertilia suborder scattered in the conservation area of the University of Bengkulu campus. This type of research is a qualitative descriptive research while the research method used is exploratory research method. Data collection techniques using VES (Visual Encounter Survey) modified with puposive sampling technique. The results of the inventory that carried out in the area have been found in seven types of reptiles (Sauria Sub Order) and were classified into four familli namely Gekkonidae (Gekko monarchus, Hemidactylus frenatus, and Hemidactylus platyurus), Scincidae (Eutropis multifasatae), Agamidae (Bronchocela cristatella, Draco volans), Varanidae (Varanus salvator) . The scientific article produced from research on the reptile inventory in the Lacertilia suborder was used as a source of learning in the course of Environmental Biology. From the writing of this scientific article, there are 7 indicators that indicate in good score, including the ability to write the basic framework of the article such as the title, identity, article components, abstracts, introduction, results and discussion, and conclusions with an average score of 3.08. Meanwhile, the ability to write in terms of writing procedures, writing research methods, and writing a bibliography has an average score of sufficient with an average score of 2.3.

Keywords
scientific; articles; writing; ability.

Topic
Biology Education

Link: https://ifory.id/abstract/ezHD327rAX9W

Corresponding Author
Agus Sundaryono

Institutions
1Graduate School of Science Education, University of Bengkulu, Bengkulu Indonesia
2 Undergraduate School of Chemistry Educations, University of Bengkulu, Bengkulu

Abstract
The purpose of this study is to develop a learning module based on laboratory research on Kebiul seed extract test to increase platelet count in mice. Twenty-five mice were grouped into five, group K- , mice were given sesame oil orally, K +, mice were given aspirin, and group P1, P2 and P3, mice were given Kebiul seed extract at a dose of 0.028 g / kgbw, 0.056 g / kgbw and 0.084g / kgbw. This laboratory research is then packaged as a supplementary module that was developed using the 4D model. The quality of the module can be identified by validation of expert judgment. The ability to think critically is measured using indicators focusing questions, considering whether the source is reliable or not, the indicators conclude by induction thinking and considering the results of induction, and identifying assumptions. Kebiul seeds with a dose of 0.056 g / kg bw are the most effective way to increase platelet counts in mice and have the potential to be used as a medicine to increase platelet count in DHF patients. Based on the results of expert validation, media experts gave a value of 91.9%, material experts amounted to 86.8% and module experts amounted to 86.4%, the modules were categorized as very feasible to use, student responses to the modules amounted to 85.80% (very good and effective) and feasible to use.

Keywords
Biji Kebiul (Caesalpinia bonduc); DHF; Critical Thinking; Traditional medicine; Learning module

Topic
Chemistry Education

Link: https://ifory.id/abstract/2RCxTQPmAfK8

Corresponding Author
Avidlyandi Avidlyandi

Institutions
1. Program Studi Magister Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu. Jalan W.R. Supratman, Kandang Limun, Bengkulu, 38371, Indonesia.
2. Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu. Jalan W.R. Supratman, Kandang Limun, Bengkulu, 38371, Indonesia
* morina[at]unib.ac.id; morinaadfa[at]yahoo.com

Abstract
Antitermite activity methanol extract of lichen Teloschistes flavicnas (SW) Norman was investigated in the laboratory scale. No-choice test was used as method with 5 concentrations tested of 1.25%, 2.5%, 5.0%, 6.25% and 7.5% b/v. The termiticide activity showed that the mortality of termites was increased every day as well as the concentration of the extract increased, at the concentration of 7.5% all termite dead at fourth days. Termiticide activity of methanol extract of T. flavicans was influenced by the GC-MS data that showed 78 chemical components. Vicanicin, methyl oleate, methyl palmitate, and patchouli alcohol was detected as major components that be expected as termiticide. T. flavicans might be possible as a botanical termiticide in the near future.

Keywords
Termiticide activity, T. flavicnas, C. curvignathus, GC-MS, patchouli alcohol

Topic
Chemistry

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

Corresponding Author
A. Naashir M. Tuah Lubis

Institutions
1) IAIN Padangsidempuan, Sumatera Utara, Indonesia
2) Mathematics Education Program, Universitas Bengkulu, Indonesia

Abstract
Problem-solving is one of the goals of mathematics learning. Ethnomatemics-based realistic mathematics learning is learning with starting-point contextual problems that are close to students minds. This study aims to determine the effect of ethnomathematics-oriented realistic mathematics learning on problem-solving abilities. That is a type of quasi-experimental research. The study design was a nonequivalent control group. The population is SMA N 2 Kota Bengkulu in 2019. The sample of this study was 68 students from Class X MIPA A and X MIPA D. The research instrument was a test of problem-solving skills. Data were collected through tests and analyzed by covariate analysis. The results of this study are that realistic mathematics learning oriented to ethnomathematics has a positive effect on the ability to solve. The conclusion is that realistic mathematics learning with ethnomathematics orientation can improve mathematical problem-solving skills for secondary school students. We suggest that mathematics teachers can develop realistic mathematics learning tools with ethnomathematics as a starting point for learning.

Keywords
Realistic Mathematic Education, Ethnomathematics, Problem Solving Ability

Topic
Mathematics Education

Link: https://ifory.id/abstract/ADJz3NcdGEVf

Corresponding Author
Febri Berthalita Pujaningsih

Institutions
a) Program Studi Pendidikan Fisika, Universitas Jambi, Jl. Lintas Jambi-Muaro Bulian Km. 15, Muaro Jambi 36122, Indonesia
*febri.berthalita[at]unja.ac.id
*kurniawan_wawan[at]unja.ac.id
*nadyaput98[at]gmail.com
b) Program Studi Teknik Sipil, Universitas Jambi, Jl. Tri Brata Pondok Meja, Muaro Jambi 36361, Indonesia
c) Program Studi Arsitektur, Universitas Adiwangsa, Jl. Sersan Muslim The Hok, Kota Jambi 36138, Indonesia

Abstract
The concept of physics can be applied to aspects of customs and culture in order to preserve local wisdom. One way to introduce the customs and culture of the local area can be done by studying traditional houses. Jambi traditional house is one of the local wisdoms that every generation needs to know. The foundation structure of the Jambi traditional house uses wooden poles arranged to support the weight above where. Mass of each pole has a correlation with the amount of load that has been distributed evenly. The purpose of this study is to analyze and explain the application of physics concepts in the foundation structure of traditional Jambi houses and to build character education to new generation. The process of collecting data is done by interview, observation, and documentation. Based on the data analysis, it is shown that the mass of each pole is strong enough to support the live and dead load that has been analyzed. Because it has a pole mass greater than the distributed load. So this can educate the new generation to know the process of making foundation structures that are done with certain calculations that can be analyzed through the concept of physics.

Keywords
physics concept; local wisdom; Jambi traditional house; the foundation structure of a traditional Jambi house

Topic
Physics Education

Link: https://ifory.id/abstract/rQYjknVw6AXZ

Corresponding Author
Dewi Handayani

Institutions
a) Program Studi Pendidikan Kimia, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia
*d.handayani[at]unib.ac.id
b LPMP Bengkulu, Jl. Zainul Arifin No. 2 Nusa Indah Singaran Pati, Bengkulu 38229, Indonesia

Abstract
This research aims to improve the student activities and learning outcomes in the course of chemistry food materials. The type of this research is a classroom action research, which consists of 3 cycles. The research subjects were students of the chemistry education study program who took chemistry food materials courses in the odd semester of academic year 2017/2018, totaling 35 people. The data analysis technique is by calculating the average value, absorptive capacity, and classical learning completeness. As for the observation data, it is done descriptively, by calculating the total score obtained by the category of less, sufficient, and good. The results showed that there was an increase in the average value of student tests per cycle, namely 78.81: 80.18: and 85.69. The activities of lecturers and students, it was increasing in good categories. The use of problem solving learning models with video media as a source of independent learning turns out to be able to improve learning outcomes and student activities in the course of chemistry food materials when it compared to the initial of previous student-s knowledge, it is because students can be involved in the learning process by listening and seeing, so they have a high absorption ability to remember information, objects and events.

Keywords
Problem solving, learning videos, chemistry food materials

Topic
Chemistry Education

Link: https://ifory.id/abstract/UcrVEpDwgzv3

Corresponding Author
Dewi Herawaty

Institutions
1 Mathematics Education Program, Universitas Bengkulu, Indonesia
2 Mathematics supervisor, Kabupaten Seluma, Indonesia
3 Lembaga Pendidikan Einstein Learning Plus, Indonesia
4 Teacher in SMP N 11 Kota Bengkulu, Indonesia

Abstract
Algebra is mandatory learning in junior high school. That is a continuation of arithmetic with the bridge being variable. Students often have difficulty in understanding it, especially quadratic equations. The purpose of this study is how students cognitive processes in understanding the principles of quadratic equations. It was an exploratory study conducted on research subjects. The subjects were junior high school students selected based on their ability to understand concepts and principles about quadratic equations. Thats done through tests about understanding quadratic equations. There were 16 selected research subjects. They were interviewed in-depth by researchers using interview guides. Interview data were analyzed qualitatively based on genetic decomposition. The results of this study are that students can use square, rectangular and unit square cards to determine the principle of factorization of quadratic equations. Students can generalize until completing a perfect quadratic equation. The conclusion is that the cognitive process of students who learn to use learning media based on square and rectangular able to reach a high level (trans-level).

Keywords
cognitive processes, quadratic equations, cognitive levels

Topic
Mathematics Education

Link: https://ifory.id/abstract/G4fMFLUEjAYw

Corresponding Author
Nurul astuty Yensy

Institutions
Bengkulu University

Abstract
This research-s aims was to provide an alternative for observer and statistical user who were interested in analyzing the functional relationship between ordinal response variable and explanatory variable. The data used was the data of Students on Generation 2017 JPMIPA FKIP Bengkulu University. The data required was a student-s GPA for two semesters (semester I and II), that was as a response variable with 5 categories of grade (GPA < 2.0 worth 1; 2.0 ≤ GPA < 2.5 worth 2; 2.5 ≤ GPA < 3.0 worth 3; 3.0 ≤ GPA <3.5 value 4 and GPA ≥ 3.5 value 5). While the free variables included: Gender, Fathers Education, Fathers Occupation, Parents Income, Mothers Education, Mothers Occupation, High School Status, Average of High School Report, National Examination, UNIB admission pathway and suitability of study program. The test statistic from the modified probability ratio in ordinal logistic had a higher test power than the F test in the classical linear regression for H0: β = 0. Overall the probability of rejection (H0: β = 0) of ordinal logistic tended to be lower than the classical regression . At condition of ρ close to 1, the test power of the ordinal logistic would be the same as the classical regression. Ordinal logistic model tended to be more selective in choosing variables that significantly affect the response, resulting in a simpler model than the classical regression. The results of the research with the classical linear model (significant level α = 0.05) obtained variables that influence the student GPA were UN score, High School Report, UNIB admission pathway, High School Status and interaction of UN Score & High School Status. While the ordinal logistic model produced influential independent variables were the UN Score, High School Report, High School Status and the interaction of UN Score & High School Status.

Keywords
Ordinal Logistic, Classical Regression, Categorical Variable, Power of Test

Topic
Mathematics

Link: https://ifory.id/abstract/63Z2W4DmQuAG

Corresponding Author
Titin Karlina

Institutions
Institut Agama Islam Negeri (IAIN) Bengkulu, Jl. Raden Fatah Pagar Dewa, Kota Bengkulu 65144, Indonesia.

Abstract
Abstrak. This correlational study aims to determine the effect of learning interest fowards in mathematics achievement in Junior High School students PGRI Kota Bengkulu. The sampling in this study used a purposive sampling technique with consist12 student, grade VII, which is 5 boys and 7 girls. The data is collected by using a questionnaire and documentation. Then, the data is analyzed using correlation analysis. Based on the results of the analysis, it is concluded that students interest in learning has a positive effect on mathematics achievement. Keywords : Interest to Learn, Mathematics Achievement

Keywords
Interest to Learn, Mathematics Achievement

Topic
Mathematics Education

Link: https://ifory.id/abstract/ghptW34bC8AY

Corresponding Author
Nur Aliyyah Irsal

Institutions
Universitas Bengkulu

Abstract
The critical thinking, that involve the reflective and evaluative process, has a significant role in students- everyday life. Therefore a teacher candidate need to has a good critical thinking to be able to foster their students thinking critically through learning mathematics. As an initial step to reinforce the critical thinking of teachers candidate, we need to know the state of their thinking. For this purpose, we conducted a descriptive study to investigate the critical thinking of mathematics education students in geometry. We designed a writen task in two types: true/false questions to investigate the critical tinking in their geometric comprehension and making decission, and problem solving questions to check their using of critical thinking in solving problems. The result we get showed the lack of mathematics education program students critical thinking in the geometry context. This conditions was due to their misconception of geometry context, their less paying attention to the whole situation and condition, and their less open analysis of situations. It implied that the geometry course need to be improved in using medias and strategies that involved more challenging problems and using more open analysis and logical thought in comprehend the concepts.

Keywords
mathematics education, critical thinking, geometry

Topic
Mathematics Education

Link: https://ifory.id/abstract/mLUH9apnce84

Corresponding Author
nur hidayah

Institutions
1Physics Study Program, Jambi University, Jambi –Ma. Bulian Street KM 15, Mendalo Darat Jambi 36361, Indonesia
2D3 Study Program, Sains Laboratory, Bengkulu University, WR. Supratman Kandang Limun Street, Muara Bangka Hulu Bengkulu 38371, Indonesia
3Chemistry Study Program, Jambi University, Jambi –Ma. Bulian Street KM 15, Mendalo Darat Jambi 36361, Indonesia

Abstract
Temperature control is very prominent to be done in producing biochar, because the quality of biochar depends on combustion temperature and the amount of oxygen existing when the combustion process is happening. In this research, the designing of furnace for biochar production by using vacuum pump and temperature manual control had been done. The fuel used was LPG gas. The furnace was designed by having two parts which are cylinder tube for biochar production and tube feet as the holder of the kiln. The calibration of the furnace for biochar production was done to find out the temperature and the pressure that can be generated and its effect toward produced biochar. The calibration was done by using vacuum pump to vacuum the combustion chamber and temperature manual control as temperature indicator. There were two steps for this furnace calibration, first, the leakage test and second, combustion test of biochar production. The leakage test was done by using bubble test method. The result showed that there were still some leakages happened, but they were fixed with glue on the leak parts. As the final result of the leakage calibration, the vacuum condition obtained was -25 cmHg. And as the result of biochar combustion as long as one and two hour, the temperature reached 2800C and 2500C.

Keywords
Biochar; furnace; temperature control manual;vacuum pump

Topic
Physics

Link: https://ifory.id/abstract/cZ8MNmqu7PGW

Corresponding Author
Febrian Solikhin

Institutions
a) Program Studi Pendidikan Kimia, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia
*febrian.solikhin[at]unib.ac.id
b) Jurusan Pendidikan Kimia, Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Sleman, Yogyakarta 55281, Indonesia

Abstract
This study aimed to develop a Chemistry Teaching Guide (CTG) on electrolyte solution and redox reactions based on scientific inquiry and to find out its quality through the assessment of high school chemistry teachers. The electrolyte solution and redox reaction were selected because this material easily developed activities based on scientific inquiry. The development model used was a procedural model adapted from the development model of Borg and Gall by simplifying it into 5 stages. The CTG produced was assessed by 5 high school chemistry teachers. The quality of the development results in terms of the 5 components of assessment, namely content, presentation, language, implementation, and appearance. The CTG based on scientific inquiry has been developed. The quality of CTG is in Very Good category in terms of the results of the chemistry teachers assessment. Thus, the CTG is worth to use by the teacher as a guide in the learning of electrolyte solution and redox reactions based on scientific inquiry.

Keywords
Electrolyte, Redox, Teaching Guide

Topic
Chemistry Education

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

Corresponding Author
Nike Anggraini Anggraini

Institutions
(a*)Program Studi Pendidikan Biologi, Universitas Sriwijaya, Jl. Srijaya Negara, Bukit Lama, Palembang 30128, Sumatera Selatan Palembang
(b)Program Studi Pendidikan Biologi, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia
(c) Program Studi Pendidikan IPA, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia

Abstract
This research aims to : 1) knows and inventory the types of invertebrates which is in the rats island; 2) development of biology instructional media based on macromedia flash for student high school to matter in the second semester class X for animalia subjek, 3) Know the quality of learning based media invertebrates macromedia on the assessment of the and teachers biology. This methods for invertebrates inventory on the rat island, withh a survey method, interview, and dexplorative description to another biota on the island. The development of product learning based macromedia flash, is R and D research ( Research and Development) with used the ADDIE Model ( Analysis, Design, Development and Production, Implementation, Evaluation). Based on the Research, there was any 18 Species from 6 phylum invertebrates. This is Porifera, Coelenterata, Mollusca, Vermes, Echinoderms and Arthropods. The results from analysis data with the survey, based on the validation of linguistic expert (86,4%), validation subject matter experts (483,9 %), validation of media expert (87,8%) the validator eligibility by teachers (84,5%) and the test of the students (86,04%) the result is very good criteria. Based on this percentage , it can be concluded that media biology media based on macromedia flash from the invertebrates inventory on the island of mice it is very appropriate used by teachers and students.

Keywords
Invertebrata, Macromedia Flash, R and D, ADDIE

Topic
Biology Education

Link: https://ifory.id/abstract/qRn4zk8Yu6gj

Corresponding Author
Nurul Azmi

Institutions
UNIVERSITAS BENGKULU

Abstract
This research and development aims to (1) producing development of HOTS oriented physics teaching materials with scientific approach valid on hooke-s law and elasticity concept, (2) describing characteristics of HOTS oriented physics teaching materials with scientific approach on hooke-s law and elasticity concept developed, (3) knowing the students response to HOTS oriented physics teaching materials with scientific approach on hooke-s law and elasticity concept. Research type used R&D level 1 adapted covers potential and problems, literature study and information gathering, product design, initial product, product validation, product revision, final product and readability trials. The subject of readability trials in this study were students of class XI IPA 1 in SMA N Plus 07, Bengkulu City which consisted of 15 students. The instruments used in this study is observation sheet, questionnaire needs, product validation questionnaire sheet and product readability test sheet. Conclusion from this research and development , namely HOTS oriented physics teaching materials with scientific approach on hooke-s law and elasticity concept in the category valid based on material aspects and aspects of language, characteristics of teaching materials include self instructional, self contained, stand alone, adaptif and user friendly.

Keywords
Physics teaching materials, Higher Order Thinking Skills (HOTS), Scientific approach

Topic
Physics Education

Link: https://ifory.id/abstract/uTN7Qkp3KyP8

Corresponding Author
Andik Purwanto

Institutions
Prodi Pendidikan Fisika FKIP Universitas Bengkulu

Abstract
This research wasaimed to develop a valid Student Worksheet (LKPD) oriented to Higher Order Thinking Skills (HOTS) with a problem solving model on electromagnetic induction material. This research was a type of development research (Research and Development) with type 1 design consisting of 5 stages, namely: 1) potential and problems 2) literature study and information gathering 3) product design 4) design validation 5) tested design. Design validation was carried out by 3 expert judgments and 3 Practitioners to assess products developed from aspects of presentation, content, and language. Based on the results of the validity of the presentation aspects, the results were 76.3% (very good categories), content aspects at 74.4% (good categories), and language aspects at 80.1% (very good categories). Based on these results, it was concluded that the HOTS-oriented LKPD developed was declared valid and was a tested design with a percentage of the total validity test which was 86% (very good category).

Keywords
Student Worksheet, Higher Order ThinkingSkills, ProblemSolving

Topic
Physics Education

Link: https://ifory.id/abstract/XkaLnvcQgx9T

Corresponding Author
Agus Susanta

Institutions
FKIP, Universitas Bengkulu

Abstract
The purpose of this study was to develop mathematics test instruments for secondary school students that valid, reliable, a good discriminationtion, and a good level of difficulty. This research was a research and development using the stages of instrument development, namely: (1) compiling test instrument specifications, (2) writing test instruments, (3) examining test instruments, (4) conducting test, (5) analyzing items, (6 ) fixing the test. The instruments used in this study consisted of expert validation sheets and student response sheets. The subject in this study was thirty secondary students of the Mathematics Education Study Program, Faculty of Education, University of Bengkulu on mathematical learning evaluation course. The results of the research showed that in developing of the instruments obtained were 160 items of multiple choice test for seventh and eight grade. The results of the analysis showed that all test instruments were reliable with a high category, good discrimination, and easy to medium difficulty level. The results of student responses in preparing test instruments showed high criteria with an average score of 49.70

Keywords
development, mathematics test instruments

Topic
Mathematics Education

Link: https://ifory.id/abstract/HYnEjuvCdf7F

Corresponding Author
Rosane Medriati

Institutions
UNIVERSITAS BENGKULU

Abstract
Abstract. This study aims to describe whether there are significant differences in students taught with guided inquiry models towards critical thinking skills in physics subjects. The research sample was students of class X MIPA 3 and X MIPA 4 in SMA Negeri 3 Kota Bengkulu even semester 2018/2019 on the concept of work and energy. This research is a study of quasy experiment with a design of nonequivalent control group design. For testing data used instruments of critical thinking skills, which are in the form of essays totaling six questions. The results of the descriptive analysis, the average score of critical thinking skills increased in the experimental class with guided inquiry models and control classes with the direct instruction model. The result of inferential analysis shows that guided inquiry learning has a significant effect on students critical thinking skills. So it can be concluded that there are significant differences in learning with guided inquiry models towards critical thinking skills in physics subjects students of SMA N 3 Bengkulu city.

Keywords
Guided Inquiry Models, Critical Thingking Skill

Topic
Physics Education

Link: https://ifory.id/abstract/FVmYDpLRt8wu

Corresponding Author
Endang Widi Winarni

Institutions
a) Department of Primary Teacher Education, Faculty of Teacher Training and Education, University of Bengkulu, Bengkulu Province, Indonesia
*endangwidi[at]unib.ac.id
a) Department of Information System, Faculty of Engineering, University of Bengkulu, Bengkulu Province, Indonesia

Abstract
Earthquake is one of frequently natural disasters which is still unpredictable. Nevertheless, we can still be able to reduce and prevent its negative impacts through implementing earthquake disaster preparedness. This study aimed to examine the effect of android-based earthquake game toward Bengkulu City elementary school student‘s knowledge about earthquake disaster preparedness. The subjects were fifth-grade elementary school students in Bengkulu City. The quasi experiment research was conducted using Matching – Only Pre-test Post-test Control Group Design. Android-based earthquake game software was used as treatment in experiment group. Data was collected using multiple choices test sheet instrument. The result found that experiment group mean knowledge about earthquake disaster preparedness was higher than control group. It was also concluded that there was significant difference between experiment group and control group. The advantages and limitations of the android-based earthquake game and its implication to earthquake disaster preparedness education is discussed.

Keywords
earthquake; disaster preparedness; android games; earthquake game; application, digital learning

Topic
Other Relevant Topic

Link: https://ifory.id/abstract/WpURNaBvgG3V

Corresponding Author
mellyta uliyandari

Institutions
a)Sciences Education Study Program, FKIP Bengkulu University, Indonesia
Jl. Wr. Supratman, Kandang Limun, Kec. Muara Bangka Hulu, Bengkulu 38371, Indonesia
*Mellytauliyandari[at]unib.ac.id
b)Postgraduate Sciences Education, FKIP Bengkulu University, Bengkulu 38371, Indonesia
c)Department of Biology FMIPA Bengkulu University,Bengkulu 38371, Indonesia

Abstract
This study aims is to determine the effect of the isolates concentration of civet coffee and fermentation time on the protein concentration profile and protein molecular weight profile of Robusta coffee which fermented in vitro, in vivo, and without fermentation. Isolates of civet coffee made from microbial civet feces and made in five variants concentrations (2,91x108 CFU/mL; 2,91x107cfu/mL; 2,91x 106cfu/mL, 2,91x105 CFU/mL; 2,91x104 CFU/mL). In the fermentation process coffee robusta beans marinated with various concentrations of coarse isolates. The coffee beans are fermented analyzed by Uv-Vis spectrophotometer and the results obtained in vitro protein concentration of the lowest 50,95 μg/mL (fermentation time of 60 hours and isolates concentration of 2,91 x 108 mg / mL), coffee fermentation in vivo (167,44 μg/mL), and coffee without fermentation (217,61 μg/mL). The protein molecular weight profile is determined based on the results of electrophoresis. The higher the concentration of isolates civet coffee in the fermentation process, the more protein bands appear, and vice versa.

Keywords
Robusta Coffee, coffee protein concentration profile, coffee protein molecular weight profile

Topic
Chemistry

Link: https://ifory.id/abstract/VwehXBvY8t7z

Corresponding Author
helga dwi fahyuan

Institutions
1Physics Study Program, Jambi University, Jambi – Ma. Bulian Street, KM 15, Mendalo Darat Jambi 36361, Indonesia
2D3 Study Program, Sains Laboratory, Bengkulu University, WR. Supratman Kandang Limun Street, Muara Bangka Hulu Bengkulu 38371, Indonesia
3Energy and Nanomaterial Laboratory, Jambi University, Tri Brata Street, KM 11 Pondok Meja Mestong, Muaro Jambi, Indonesia
4Chemistry Study Program, Jambi University, Jambi – Ma. Bulian Street, KM 15, Mendalo Darat Jambi 36361, Indonesia

Abstract
Abstract. The biochar/TiO2 thin layer has been made by sol-gel method and the coating technique by Doctor Blade method. The variation of biochar on TiO2 were 0%, 1%, 2%, 3% and 4%. The characterization was done by XRD (X-Ray Diffractometer) to see the crystal structure of samples. Also, the characterization by UV-Vis spectrophotometer to obtain the value of energy gap. Based on XRD data, it was obtained that the crystal structure of all samples is anatase TiO2. The crystalline size of all samples has no significant different by the increasing of percentage doping. The smallest crystal size was at the addition of 3% and 4% biochar which was 118.22 nm. The results of UV-Vis characterization showed the lowest value of energy gap was at sample doping 1% biochar which was 3.25 eV. Bandgap energy value for doping sample above 1% showed an increase of bandgap energy of Biochar-TiO2.

Keywords
biochar/TiO2; bandgap energy; TiO2; Doping

Topic
Physics

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

Corresponding Author
Mala Utami

Institutions
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Bengkulu
Jl.W.R.Supratman, KandangLimun 38317 A Bengkulu, Indonesia.
*e-mail address: asdim[at]unib.ac.id, malautami0598[at]gmail.com

Abstract
SnO2 nanoparticles are n-type semiconductor materials with the band gap of 3.6 eV. These materials have been widely used in various applications, for example transparent electrodes, microsensors, catalysts and resistors. Generally, the synthesis of SnO2 nanoparticles is influenced by several factors such as reactant concentration, capping agent, temperature, stirring and pH of the solution.This study aims to determine the effect of pH variations on the crystallinity and morphology of SnO2 material. This synthesis was carried out using the hydrothermal method for 3 hours at 100 0C with glucose as a capping agent. The effect of pH on the SnO2 nanoparticlesas synthesized was studied using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). XRD analysis shows that all SnO2 nanoparticles as synthesized relatively high purity and pH variations greatly influence to the crystallinity of the SnO2 nanoparticles. SEM images show that the aggregate formation is strongly influenced by changes in pH of the reaction solution. These results indicate that optimizing the pH of the reaction solution would be an alternative route for controlling the morphology of SnO2 nanoparticles.

Keywords
Nanoparticles, SnO2, Capping Agent, Glucose

Topic
Chemistry

Link: https://ifory.id/abstract/8Mf4d7vKJDAE

Corresponding Author
SHELLY TRIHASARI

Institutions
(a)SMANKO Provinsi Bengkulu
(b)Universitas Bengkulu
(c)SMKS 10 Telekomunikasi Kota Bengkulu

Abstract
This study aims to determine the effect of the Problem Based Learning model with Scientific Approaches in improving students problem solving abilities. This study uses a quasi-experimental research design using pretest and posttest. And by using the Ancova test. The subjects in this study were students of class X SMAN Kebakakatan Sports Bengkulu Province, with a sample of 21 people from 110 students. The results of this study are that there is a linear effect of the covariates initial ability to solve problems on the final problem solving abilities of students who are taught using the Problem Based Learning model with a Scientific Approach. With a statistical value of F = 6.667 and a significance value of 0.014.

Keywords
Problem Based Learning, Scientific Approach, Problem Solving Ability

Topic
Mathematics Education

Link: https://ifory.id/abstract/YT2HDFmUxK39

Corresponding Author
Zamzaili Zamzaili

Institutions
1 JPMIPA Pascasarjana Pendidikan Matematika FKIP UNIB
2 Jurusan Matematika FMIPA UNIB

Abstract
Abstract. The aim of this study are to know the effectiveness of the corrective formative evaluation on the ability to understand geometric concepts of the studens. This research is a quasi experimental study with sample thirty two students. The data was analyzed by using covariance analysis with students- initial ability as covariate. The results of the study show corrective formative evaluation give effective constribution on the ability to understand geometric concepts with a contribution 44.5%. This study also indicates there is a significant effect of students initial ability as covariate on the ability to understand geometric concepts 35.2%. The average the ability to understand geometric concepts of the students taught with corrective formative evaluations is higher than conventional classes.

Keywords
Formative Evaluation, Understanding Ability, Geometry Concepts

Topic
Mathematics Education

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

Corresponding Author
RIZWAR No last name

Institutions
UNIVERSITAS BENGKULU

Abstract
One of the conservation efforts of the Lepidochelys olivacea turtle in Indonesia is by saving its eggs on the beach, hatching, rearing and releasing hatchlings into the sea. However, a lack of knowledge in management has affected many turtle eggs that do not hatch and hatchlings that die during maintenance. Breeding activities are controlled incubation and hatching of eggs in order to make L. olivacea more developed and avoid extinction. Eggs are planted at a certain depth of the nest but it is not known at what depth the eggs have good hatchability. The aim of this study was to determine the hatchability of the eggs and morphometric of the hatchlings (Lepidochelys olivacea) based on the depth of the brood nest. This research was conducted in 2016 at Muara Tembulih, West Coast of Lampung Province. The treatment was designed with a Completely Randomized Design in the form of four (4) treatment of egg incubation depth and 6 replications. The results of the study were treatment with nest depth of 40-45 cm, hatchability (70-73%) and morphometric size of the newly hatched turtle hatchlings (body weight ± 23 g; body length ± 7 cm, carapace length ± 4 cm and width carapace ± 3.52 cm) statistically, much higher than in nest depths of 35 and 50 cm.

Keywords
Keywords: Egg hatchability, hatchling morphometric, Lepidophelys olivaceae, nest depth

Topic
Biology

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

Corresponding Author
Lucy Asri Purwasi

Institutions
a,b) Program Study of Matematics Education, STKIP PGRI Lubuklinggau
Jalan Mayor Toha Kel. Air Kuti Kec. Lubuklinggau Timur I Kota Lubuklinggau
asripurwasi[at]gmail.com

Abstract
The purpose of this study was to determine the effect of metaphorical thinking learning approaches on mathematical reasoning and problem solving abilities. The research method used is a quasi-experimental method. The population in this study were students of the third semester mathematics education, STKIP PGRI Lubuklinggau. The sample selection is done with saturated samples. Based on the analysis of the two-party t test data obtained the results of the study, as follows 1) in the final ability of mathematical reasoning the value of t arithmetic = 2.351 and t table = 2.06 then the value of t count is more than t table so that H0 is rejected and Ha is accepted, it can be concluded significant influence of the metaphorical thinking learning approach on students mathematical reasoning abilities and 2) on the final ability of mathematical problem solving t value = 2.311 and t table = 2.06 then the t value is more than t table so H0 is rejected and Ha is accepted, it can be concluded there is a significant effect of the metaphorical thinking learning approach on students mathematical reasoning abilities.

Keywords
Mathematical reasoning; problem solving; metaphorical thinking approach

Topic
Mathematics Education

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

Corresponding Author
Neza Agusdianita

Institutions
Postgraduate Mathematics Education, Universitas Bengkulu, Jl. W.R. Supratman, Bengkulu 38371 Indonesia

Abstract
Geometrys direct objects were abstract. It was a learning material that was difficult for elementary students. Therefore, learning was needed close to the minds and daily lives of students. One of them was "Tabot" Culture. That was the ethnomatematics approach. The purpose of this research was to explore elementary geometry concepts based on Tabot Culture. We apply an explorative-qualitative approach. The subjects of this study were the makers of the Tabot, elementary students, and elementary mathematics teachers. This was a needs analysis. Activities were carried out through direct observation, documentation, in-depth interviews and focus group discussions. The research instruments were anecdotal direct observation sheets, and interview guides. Data were analyzed qualitatively. The results of the study found that the culture of Tabot provides reinforcement of student character that was obeying the principle, thinking logically, critically, working hard, curiosity, independence, confidence. The geometrical concepts that exist in the Tabot culture were the cube, the beam, the pyramid, the prism, the sphere and its elements. Also, understanding of two-dimentional figure. We conclude that Bengkulu Tabot culture can be used as a starting-point for learning the achievement of geometrical concepts and strengthening student character.

Keywords
Ethnomatematics, Tabot, Geometry Concepts

Topic
Mathematics Education

Link: https://ifory.id/abstract/rpJbQ3AHqkve

Corresponding Author
Alrizal Alrizal

Institutions
(a)Program Studi Pendidikan Fisika, Universitas Jambi, Jl. Lintas Jambi - Muara Bulian Km. 15, Jambi Luar Kota 36122, Indonesia

(b)Program Studi Pendidikan IPA, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia

Abstract
Conceptual understanding is one of the important things in physics learning. Many factors affected the conceptual understanding of students; one of them was the book. Based on data from the implementation of a questionnaire on junior high school students, their learning resources (books, etc.) have not been able to help them in understanding the concept of physics. Moreover, some abstract concepts in physics make them more difficult to understand physics. This study aimed to develop an electrostatic teaching material-oriented conceptual understanding for junior high school students. We use the ADDIE model, i.e., analyze, design, development, implementation, and evaluation. The result of this study shows that the teaching material is feasible to use in learning based on the feedback from students and validators.

Keywords
Feasibility; Electrostatics; Conceptual understanding

Topic
Physics Education

Link: https://ifory.id/abstract/NzUePvj6JtfH

Corresponding Author
Eko Risdianto

Institutions
University Of Bengkulu

Abstract
The current study was carried out for the purpose of examining the feasibility of Basic Physics II practical guide using augmented reality (AR) technology on electrical circuit and optical geometry materials. The type of this research is research and development adapting 4D development model namely, define, design, development, and dissemination. The feasibility test was distributed to a group of 20 students of physics education study program in Bengkulu University. Based on the results of the feasibility test on the display aspect with a percentage of 87.25% with a very good category, the material content aspect is 89%, the learning aspect is 88.75%, the readability aspect is 88.25%, and the practical aspect is 87%. According to the results of the feasibility test, it can be concluded that the Basic Physics II practicum guide using augmented reality technology on the developed electrical circuit and optical geometry materials is feasible to be used and further developed with an average percentage value on the feasibility test aspects of 88.05% with a very good category

Keywords
Augmented Reality, ICT-based Practical Guide

Topic
Physics Education

Link: https://ifory.id/abstract/GmUe6rhBtj3C

Corresponding Author
USMAN KRIS JOKO SUHARJO

Institutions
(a) College of Agriculture, University of Bengkulu,
Jl. W.R. Supratman, Bengkulu 38371.

*) usman_maine[at]yahoo.com,

(b) Department of Agronomy, Colkege of Agriculture, Bengkulu University, Jl. W.R. Supratman, Bengkulu 38371

Abstract
Lots of duku (Lansium domesticum Corr.) Rupit trees have died in the past ten years. However, no high yielding seedling is available for replanting. In this respect, in vitro propagation offers a perfect solution because it allows growers to get millions of pathogen-free and uniform seedlings at a very short of time for rootstocks. The objective of thi experiment was to have the best combination of 2,4-D and BAP in inducing the growth of duku explants. The experiment was conducted from February to June 2018 at the Tissue Culture zlaboratory of the Department of Agronomy and laid in Completely Randomized Design. Seeds of duku were grown in MS media supplemented with 2,4-D (1, 2, 3 ppm) and BAP (2,3,4 ppm). The results showed that all of the media tested produced callous, with different time of formation and qualities. Also, all media produced shoots, but only MS media supplemented with 2 ppm 2,4-D and 2 ppm BAP produced leaves. However, no media produced any root.

Keywords
Duku, BAP, 2,4-D, shoot, in vitro

Topic
Biology

Link: https://ifory.id/abstract/8mYadBPMu3CQ