bluuebunny/crossref_metadata_2025 huggingface dataset:
Developing A Problem-Based Learning/PBL Model for Improve Students’ English Speaking Problem Solving Ability and Self Confidence at Economic Department of University
Authors: Oktadela R , Mukhaiyar  , Gistituati N , Amri Z
Published: December 2019

This research was based on the preliminary studies in Economic Department of University in studing English. From this preliminary studies, the researcher want to find out the analysis, the effectivity, and the practicality of her products in designing and implementing PBL Model at Economic of Islamic University of Riau. The design of this research is R & D approach by using ADDIE Model. The sample was selected from one institutions in Pekanbaru namely Islamic University of Riau. The quantitative data were collected through a questionnaire and statistically analyzed by using SPSS program. Based on the reearch findings that there was the high association between Problem Solving Ability, Self Confidence, and student performed positive opinion in English speaking toward PBL Model. This conclusion is in line with educational policy to continually improve the quality especially for Economic students. For further researchers, this research suggests to conduct similar studies to develop PBL model in other program of education.
The effects of pedagogic and professional competence smk teacher’s to teacher’s performance
Authors: Ahyanuardi
Published: December 2019

This reseacrch conducted : (1) to know if there is effect of pedagogic and professional competence teacher’s to teacher’s performance in learning process; and (2) to know how much effects of pedagogic and professional competence teacher’s to teacher’s performance. This research is using quantitative descriptive method. Data was collected using questionairre and analyzed using multiple regression technique. The results showed that; (1) pedagogic and professional competence teacher’s have significant effect to teacher’s performance in learning process; (2) more than 50% teachers have high performance, pedagogic competence and proffesional competence.
Integrating Inquiry Based Learning and Ethnoscience To Enhance Students’ Scientific Skills and Science Literacy
Authors: Hastuti P W , Setianingsih W , Widodo E
Published: December 2019

Since the indigenous knowledge of factual events in the scientific materials is often doubtful, it arises awareness for science investigation through integration of Inquiry Based Learning (IBL) and ethnoscience. This research is to reveal the effectiveness of Inquiry Based Learning (IBL)integrated with ethnoscience to enhance the students’ scientific skills and science literacy. This study used quasi-experimental research with implementation of pretest and posttest. The research samples were 64 students of the first grade junior high school in Yogyakarta. They were divided into two groups, namely experimental group with integration of IBL and ethnoscience and control group with scientific approach. The instruments were observation sheets on scientific skills and science literacy as well as of students’ cognitive test. The scientific skills and scientific literacy data were analyzed using N-Gain, while the testing data were using t-test at the level of significance of 0.05. The result of scientific skills and science literacy enhancement (N-Gain) were 0.73 and 0.69, respectively. On the other hand, the significant number of the given treatment was 0,000and the value was less than 0.05. It indicated that the integration of IBL and ethnoscience was more effective in enhancing the students’ scientific skills and science literacy than the scientific approach.
The Effectiveness of Microteaching With OMTA Model
Authors: Adnyana P B , Citrawathi D M
Published: December 2019

The Microteaching course is a scaled down teaching subject that provides basic teaching skills and experience of teaching and learning student teacher. The general objective of the study was to determine the effectiveness of microteaching with the OMTA Model (Orientation, Modelling, Training, and Assessment) in the Biology Education of Universitas Pendidikan Ganesha. Specifically the research objectives were: 1) to find out and describe the learning outcomes of the Biology Education of Universitas Pendidikan Ganesha students who take Microteaching Classes with OMTA microteaching model, 2) to determine and effectively implement the OMTA microteaching model, 4) to determine student responses to Microteaching Classes using OMTA microteaching model. The research subjects were 18 Biology Education Department students who attended microteaching lectures in the sixth semester of academic year 2017/2018. The data were collected by observation, tests and questionnaires. They were analysed descriptively and statistically by one sample t-test. The results showed that the application of OMTA microteaching model was effectively used in microteaching lectures. In addition, the knowledge and teaching skills of students including categories are very good, the use of the OMTA microteaching model in lecture was very effective, and the students’ response was very positive.
Designing of Active-Iconic-Symbolic Problem Based Learning Model (PBM-ENIKSI) for elementary school
Authors: Mas’ula S , Fauzan A , Ellizar  , Darmansyah
Published: December 2019

The aim of this study was to develop an active-iconic-symbolic problem-based learning model (PBM-ENIKSI) in elementary school students so that students have a strong foundation when entering higher behaviours. This type of research is village research which was developed by Plomp to have three stages, namely preliminary research, development phase or prototyping, and the assessment phase. This study produced a system model of PBM-ENIKSI consisting of 5 stages, namely 1) initial debriefing of problem solving, 2) finding solutions to problem solving through concrete objects, 3) representing problems in tables/pictures/diagrams/graphs, 4) Resolving Problems using Mathematical symbols, and 5) evaluation Problem Solving Solutions. This model will produce models in the form of books, student books and teacher manuals as a support system that can assist users in their application.
Examination of Higher Education Management Systems in the Digital Era
Authors: Roesminingsih E , Winarko E
Published: December 2019

This article deals with application of the exam information system in higher education. The guarantee system over quality in higher education implemented by referring to customer satisfaction, National Standards on Education and demands for the development of the digital era. The solution offered is developing thesis and dissertation exam information system. Research method: Reseach and Development approach by applying Borg and Gall model (2006). The system manages the document from the time the document is created or received until it is set up to be saved. This system done as an effort to improve services to college students, appropriate decision making by the manager and also improved performance on procedures and better methods. Effectiveness and efficiency become the principle of performance measurement of the most important archiving and access systems. The results of the development show the product performance can be utilized for the management of thesis and dissertation exams throughout higher education.
Embedding Scholarly Literacy in the Curriculum of UNNES: Preparing Successful Students in Disruption Era
Authors: Syaifudin A , Rokhman F , Zulaeha I , Rustono
Published: December 2019

Scholarly literacy in higher education is very important for students to achieve successful in their study. Unfortunately, the strategic role of literacy is not optimized by students. As a result, many lecturers and stakeholders complain about the competencies of students and graduates. Based on the study of curriculum and student achievement documents, UNNES made an adaptive curriculum in order to succeed UNNES students and its graduates in the disruption era. The successful of student as an impact of the integration of scholarly literacy in the UNNES’s curriculum can be seen from the increase of students’ achievement, the students’ entrepreneurship, and the improvement of graduates’ quality. There are two patterns that used by UNNES to integrate scholarly literacy, namely: direct learning and indirect learning. Direct learning is implemented by courses, while indirect learning is done by scientific activities which carried out through student activities. The learning pattern is carried out through blended learning.
Project based laboratory learning as an alternative learning model to improve sciences process skills and creativity of physic teacher candidate
Authors: Dwikoranto  , Madlazim  , Erman
Published: December 2019

The Project Based Laboratory Learning (PjBLL) model is designed to improve the process skills and creativity of physics teacher candidates who meet practical and effective criteria. The model was developed using the Plomp design through the preliminary study, prototype stage, and assessment phase. The study design used one-group pretest-posttest design. The research subjects were 64 grade B and C physics students who were programmers in Unesa’s laboratory. Data is collected through assessment of expert validity, observation, tests, documentation, interviews, and questionnaires. Data is analysed using qualitative and quantitative descriptive statistics, N-gain and paired t-test. The results of the study show that: (1) the PjBLL model developed is included in practical category because the component model can be implemented in learning activities well, without significant constraints. (2) The PjBLL model developed is included in the effective category because the student’s process skills are improving in the medium criteria with an average N-gain of 0.58, students are able to produce creative products with a mean N-gain of 0.56, and students respond positively to the device and learning process. The implementation of the PjBLL model needs to be expanded to provide greater support for the practicality and effectiveness of the model. Based on the above, it can be concluded that the PjBLL model developed is practical and effective to improve the process skills and creativity of physics teacher candidates.
Implementing flipped learning in microecnomics course
Authors: Wardi Y , Yulhendri  , Kurniawati T
Published: December 2019

E-Learning is one of the breakthroughs in education that utilizes information technology. Various online learning models began to be developed. For example blended learning, distance learning and flipped learning. Online learning basically is trying to innovate and change the paradigm in learning. One of the online learning models which is currently quite a lot of studies in educational research is flipped learning. Flipped learning is learning that combines classroom meetings with online learning. In flipped learning things that are usually done in the classroom such as explaining the material, giving assignments, exercises and homework are transferred to online learning. In the classroom, learning is really more student centered because the students will have more time to complete case studies, conduct problem-based learning, practice and discuss. This research was conducted with a two-year development research design. The results of the first year research are the learning design and lesson plan for the implementation of flipped learning in introduction to microeconomics course.
Implementation of Step Polya in the Problem based Learning Model to Improve Learning Outcomes in Elementary School
Authors: Ningsih Yarisda , Ahmad Syafri , Amini Risda
Published: December 2019

The purpose of this research is to describe the application of Polya step in Problem Based Learning Model to improve learning outcomes about the story of the addition of fractions in the fourth grade SDN 27 Sungai Geringging Kabupaten Padang Pariaman. Research subjects were teachers (practitioners) and 16 students. The type of this research is classroom action research. Based on the results of the study, that learning using Polya step in Problem Based Learning Model can improve learning outcomes about the story of the addition of fractions at SDN 27 Sungai Geringging Padang Pariaman district, Namely (a) Observation of RPP 87.5% (B) becomes 92.89% (SB). (b) Teacher aspect 77.78% (B) becomes 94.44% (SB). (c) Student aspect 77.78% (B) becomes 94.44% (SB). (d) Student learning outcomes 76.97 becomes 87.48.
The Effects of Collaborative Learning Models on Engineering Mechanics Learning Outcomes
Authors: Silalahi Juniman
Published: December 2019

The low learning outcomes in Engineering Mechanics are influenced by the learning model used by the teachers in teaching. The ability of teachers to determine the right learning model will have an impact on the success of student learning and the achievement of learning goals. This paper aims to reveal the influence of Collaborative Learning models on learning outcomes of Engineering Mechanics. The method used in this research is a quasi-experimental method with Non-equivalent Control Group Design. The study sample was 46 people divided into two groups, namely the experimental group and the control group. The sampling technique was carried out using random sampling, 23 people for the experimental group and 23 people for the control group. Data collection using the learning result test (pre-test and post-test) in the form of objective questions for about 25 questions. The research data were analysed quantitatively using a parametric statistical analysis test with the t-test. Based on the data analysis, the results of the study show that there was a significant effect using the Collaborative Learning model on the learning outcomes of Engineering Mechanics. The experimental group using the Collaborative Learning model had higher learning outcomes than the control group using conventional learning model.
Modification of Automatic Semi System and Addition of Spin Polishing Function on Metalography Grinder Machine
Authors: Susanti N A , Zakiyya H , Samani M , Sakti A M
Published: December 2019

Grinding machines was available in the material testing laboratory of Unesa cannot be used for several reasons: there was no inlet and outlet fluids used during the process, the motor speed control has not been carried out and the grip specimen was not available. The result was the manufacture of semi-automatic workpiece clamping devices used a DC motor on polishing grinder. The dimensions of this tool was produced by length 500 mm x width 600 mm x height 570 mm used 1F Denso motor capacity of 12V 5A, with a maximum capacity of 50 mm long diameter of 40 mm. Polishing were influenced by the type of material and rotation’s variation.
Analysis of Mechanical Properties of Timber Materials
Authors: Darmono  , Ma’arif Faqih , Widodo Slamet , Pamungkas Sidik
Published: December 2019

This study aims to conduct the value of modulus of rupture (MOR) and modulus of elasticity (MOE) where the flexural strength is one of the highest mechanical properties compared with other mechanical properties. The method used is a flexural strength test using a three-point loading test, whereas for specific gravity and moisture content using the drill method. The materials used in this study are Bangkirai, Teak, Camphor, Sukun, and Coconut wood. The results of this study indicate that the moisture content is directly proportional to the value of MOR and MOE, except for the MOE of Coconut wood. The specific gravity is linear with MOE, except for MOR and MOE (coconut and teak wood).
Implementation of Troubleshooting Teaching Method to Develop Student’s Competency in Conducting Motorcycle Tune-up
Authors: Arsana I M , Susila I W , Hidayatullah R S , Ariyanto S R
Published: December 2019

Lack of media used in teaching and the conventional method used are also become the factors which influence the less student’s competency achieved in practical learning of motorcycle tune-up. This study aims to develop the student’s competency in motorcycle tune-up by applying the Troubleshooting teaching method towards undergraduate students in Education of Mechanical Engineering department. This study used Classrom Action Research (CAR) which used 26 students as subject. They are Undergraduate Student in department of Education of Automotive Mechanical Engineering, Unesa, Indonesia. This study used test method to evaluate the student’s competency in motorcycle engine tune-up. Based on the achieved data, it is then analyzed descriptively. This troubleshooting teaching method was able to develop student’s study result (student’s competency), started from 81,6 in cycle 1, then 83,3 in cycle 2, and 87,1 in cycle III. The completeness of classical study started from 53,8% in cycle 1, grew to 57,5% in cycle II, then reached 88,5% in the last cycle.
Analysis Comparative Feeding Variation to Quality Surface Processes Blocking Equipment of Ems Steel 45on Cnc Latheing Machine
Authors: Yufrizal A , Indrawan Eko , Helmi Nofri
Published: December 2019

This research aims to analysis comparative feeding variation to quality surface processes blocking equipment of ems steel 45on cnc latheing machine. Quality products are obtained from good cutting conditions. One of the most important variable cutting conditions to obtain surface roughness quality is feeding. The purpose of this study was to see the comparison of feeding variations of G94 and G95. The multilevel cutting process is carried out with a cutting depth of 0.5 mm and a length of 40 mm with a carbide cutter with feeding variations (G94 / G95) of 0.3048 mm / min and 0.3281 mm / min respectively and at the price of the round / cutting speed speed (G97 / G96) is controlled. Surface roughness testing using Surface Tester Mitutoyo SJ-201P. The result of this research can be concluded that the higher the surface roughness obtained is lower compared to the average price of roughness of the lathe result that uses low feed.
Impact of the Implementation of Problem Based Learning in Soil and Rock Mechanic Subject to Activities and Student Learning Outcomes of Study Programs Outside Domicile, Sawahlunto State Community Academy
Authors: Abdullah Rijal , Sy Muhammad Iqbal
Published: December 2019

This research was motivated by the low achievement of learning outcomes of Land and Rock Mechanics subject by students of Study Program Outside Domicile of Sawahlunto State Community Academy. This study purpose was to reveal the impact of Problem Based Learning application to the activities and the learning outcomes of Soil and Rock Mechanics subject of students of Study Program Outside Domicile of Sawahlunto State Community Academy. This research was in the form of Class Action Research Model Kemmis and Mc Taggart, consisting of four components (planning, action, observation, and reflection). After learning in three cycles, the results showed that the application of Problem Based Learning in Soil and Rock Mechanics subjects to Study Programs Outside Domicile of Sawahluto State Community Academy turned out to be able to increase student learning activities, reaching very high categories, and achieving student learning outcomes average 83.33, above of the Minimum Graduation Standards value (70).
Effect of Porosity on Soil Permeability in the Flood Area of Padang City
Authors: Giatman M , Haq S , Andayono T
Published: December 2019

The diversity of soil types in Indonesia causes the design of development to have to adjust its planning carefully in accordance with the type of soil, so that it is necessary to test the mechanical properties such as porosity, pore number, and density. In the city of Padang, there are several areas often flooded (flood). This associative study was conducted to reveal the relationship of the influence of porosity and permeability of the soil which is often inundated in the city of Padang. This research was conducted in May-June 2018 in the Soil Mechanics Labor Department of Civil Engineering FT UNP with soil samples in the area of Kampung Jambak Lubuk Buaya, Padang City. The analysis technique used the Microsoft Excel application to present data into simpler information and analyze the relationship using the Pearson Product Moment formula. The results of the study obtained soil porosity values of 63.53% (large porosity). Soil permeability value is 0.0000633 cm/second or 0.23 cm/hour (very slow). The effect of porosity on soil permeability in the Kampung Jambak Lubuk Buaya Padang City is 3.37% with t-count smaller than t-table or 0.324 <3.182 or insignificant.
Development of Competency Based Learning Model in Learning Computer Networks
Authors: Efendi Raimon , Jama Jalius , Yulastri Asmar
Published: December 2019

Based on preliminary research that has been done, research problems are The purpose of computer network learning has not been clearly defined based on student needs, the learning process of computer networks is not optimal. The development of computer network learning uses a model of competency based learning aimed at helping educators facilitate students to be active, innovative, and creative in constructing their knowledge, through real experiences students get in the learning process. This research is research and development (R & D) that uses competency based learning learning models. Development of competency based learning learning models using the ADDIE model. Based on data analysis, the findings of this study are Competency Based Learning learning model has been successfully developed, The syntax of developed competency based learning models consists of 5 learning steps, Computer network teaching manuals consisting of syllabus and semester learning plan, and WEB-based learning media that are valid, practical, and effective. The results of this study can be used by lecturers, and learning designers in developing or realizing the learning process that can facilitate students to be active, innovative, and creative in developing students’ knowledge of computer networks better.
Virtual Laboratory for Elementary Students
Authors: Pramono S E , Prajanti S D W , Wibawanto W
Published: December 2019

Experiment-based science learning for elementary school children in Indonesia is constrained by infrastructure. Only a few elementary schools have integrated laboratories, which led to science-based thematic learning mostly limited to conceptual or theoretical. The solution offered by this article is the use of a virtual laboratory (VLab-“little scientist”) designed specifically for elementary school students. The little scientist simulates several types of basic experiments using attractive, colorful, and simple visual displays that are easily understood by the young learner. The Virtual Lab-little scientist was developed using the RnD method and operated using screen-based hardware like PC or Mobilephone. The VLab-little scientist was tested on 4th and 5th graders of Elementary School. The test results that the utilization of virtual labs is able to improve students’ science process skills. Students were able to experiment with real equipment, after using the VLab-little scientist. Subsequent development needs to consider the elementary school science curriculum and further test to explore the effectiveness of using virtual lab.
Application of Technology Acceptance Model to E-learning Assessment (Kelase) in Agricultural Technology Education, UniversitasNegeri Makassar
Authors: Sukainah A , Reski P P , Fadilah R , Mustarin A
Published: December 2019

Kelase is an E-learning program that has been applied in the Agricultural Technology Education (PTP), especially in the Toxicology and Food Safety courses. This study aims to analyze application and acceptance of PTP students to Kelase, as well as variable correlation and linearity used in the Technology Accepted Model (TAM) method. The independent variables in this study consisted of variables perceived ease of use and perceived usefulness, while the observation variable was acceptance. Techniques for collecting data through giving questionnaires. The questionnaire instrument was tested for its validity and reliability. Data measurement scale uses Likert scale. Data processing uses IBM SPSS 20.0 software. The results show that level of perception of PTP student admissions is very high, which is between 70.1-91%. The correlation of TAM variable is significant and positive. Both variables, perceived ease of use (X1) and perceived usefulness (X2), are very influential on acceptance (Y) and both of these variables simultaneously influence the level of student acceptance of Kelase. The regression determination coefficient is generated, which is 52%. These results indicate that the influence of variables perceived ease of use (X1) and perceived usefulness (X2) is only 52%, and the rest, which is 48% influenced by other variables.
Investigating the effect of learning multimedia and thinking style preference on learning achievement on anatomy at Universitas Kristen Indonesia
Authors: Nadeak Bernadetha , Naibaho Lamhot
Published: December 2019

This study is aimed to investigate the effect of learning multimedia and thinking style preference on the learning achievement of anatomy, and it was done at Medical Faculty of Universitas Kristen Indonesia. It was quantitative research with the quasi-experimental design. The population were the students batch 2017 and 2018, and the sample was chosen randomly. Test (consisted of 37 test items) and non-test (a set of the questionnaire consisted of 15 items ) were used as the instruments in this study. The data which was obtained through the instruments of the study were analyzed using descriptive statistics and inferential analysis through anava test 2×2 The results were; a) the student’s learning achievement average when they were taught using multimedia (video) was 27.37, while student learning achievement average when they were taught using multimedia (powerpoint) was 23.6, means that H0 was rejected and Ha was accepted; b) the student learning achievement average with abstract thinking style preference was 30.89 and student learning achievement average with concrete thinking style preference was 21.01, means that H0 was rejected and Ha was accepted. As a conclusion that there is no interaction between learning multimedia and thinking style and the effect on students’ learning achievement of Anatomy.
The Challenges of Implementing ICT in The Indonesia National Education System of The Industrial Revolution Era 4.0
Authors: Mirfani A M
Published: December 2019

The Industrial Revolution since the era of 1.0 to 4.0 has facilitated almost all orders of life to change according to the novelty it presents, including the management of education. The management trend of the national education system has made various efforts to change, which among other things are to answer the challenges of the industrial revolution. However, it is good for ICT charged change programs to be approved. This paper discusses some of the basic challenges of the application of ICT in the trend of national education development that supports the challenges of the industrial revolution era 4.0. The method used is a comparison between the target programs in the strategic plan with the results. ICT is constrained by the still weak socialization and the low level of IT literacy among the main managers of education, especially at the level of the education unit management.
Science environment technology and society approach learning to improve natural disaster mitigation literacy
Authors: Supriyadi  , Rusilowati A , Linuwih S , Binadja A , Salawane C
Published: December 2019

This research is motivated by the location of Indonesia in disaster areas. But the readiness of citizens to deal with disasters is still low. This study aims to (1) develop natural disaster learning packages with the vision of the Science Environment Technique Society (SETS) which is integrated in science subjects, (2) implement disaster prepared teaching materials, (3) improve teacher understanding and skills, students about concepts, principle, the practice of saving oneself in the event of a natural disaster. This research was conducted in collaboration with teachers in primary and secondary education. Theoretical exploration and expert evaluation are carried out on the features of themes and sub-themes of disaster learning models that are integrated in SETS vision science subjects. Data analysis technique used (1) descriptive percentage, (2) normalized gain test, and (3) t-test. The results of this study in the form of five features of learning models such as (1) syllabus, (2) lesson plans, (3) learning methods, (4) teaching materials, and (5) assessment instruments. Desimination of the five features was declared feasible to increase students’ understanding of disasters. This is seen from the test results obtained by students experiencing an increase (gain) from pretest to posttest starting from 53.5% to 80.3%.
Primary School Teachers and Learning Media in the Era of Education 4.0
Authors: Laisa Zulaeha
Published: December 2019

Education era 4.0 demands teachers to be more competent since the nation’s progress is determined by education quality, particularly in the primary education level. However, education in Indonesia, especially in Eastern Indonesia, is very apprehensive due to limited facilities and infrastructure as one of the factors that trigger the low quality of education and human resources. The information technology utilization, specifically computer applications for primary school teachers, has not yet run well and equal. Other educational levels that still implement conventional learning that is no longer able to fulfil educational needs for complex societies require innovations and media to address this issue. A preliminary survey in several primary schools in Gorontalo revealed that teachers wanted to use computer applications as the learning media. The training of utilizing computer applications for primary school teachers is not the only solution to improve students’ comprehension about learning topics. A good cooperation between related institutions or agencies is required to produce teachers who understand technology in education era 4.0. Higher education institutions that will produce quality teachers should arrange a course curriculum that highly influences students as the teacher candidate. School members should also provide supporting facilities for an effective learning process.
Exploration on Ethnomathematics Phenomena in Kudus Regency and its Optimization in the Mathematics Learning
Authors: Zaenuri  , Cahyono A N , Dwidayanti N
Published: December 2019

This study aims to explore the ethnomathematics phenomena in Kudus, a regency in Central Java province, Indonesia, and its optimization in mathematics learning. We explored the cultural sites and customs of the Kudus community, including the traditional clothing, traditional food, local units, and children’s traditional games. We conducted some observations, interviews, documentation, and literature review to collect data, and then the data were analysed descriptively. The results suggest that there are various forms of ethnomathematics found in Kudus Regency. The mosque of Menara Kudus and the Kudus traditional house consist of many mathematical concepts such as planar figures and solid figures. The embroidery designs in the Kudus traditional clothing and some traditional equipment also show many figures, such as caping which has a cone shape. Furthermore, we also found some local units used in daily life, such as sa-unting, sa-ombyok, and se-tandan which each represents a different number of things. The children’s traditional game, gundu, was also interesting and potential to be used in mathematics learning. Various forms of ethnomathematics can be optimized to improve the quality of mathematics learning using problem-based learning and project-based learning models.
Realistic Mathematics Education (RME) Approach to Enhance Mathematical Cognition of Elementary School Students
Authors: Irdawati A , Marlina R , Marlina  , Murni I
Published: December 2019

Mathematical cognition is a fundamental skill in studying mathematics at the elementary school level. Teaching mathematics at school must aim to enhance mathematics cognition and can be used to solve real-life problems. This study observed the increase in students’ mathematics cognition after implementing RME approach in the classroom. This study used a quasi-experimental design. The subject is 58 elementary school students at Agam and Bukittinggi. Data analyzed using SPSS statistic program. The research showed that there is a significant difference in students’ mathematics cognition after learning with the Realistic Mathematics approach. It can be assumed that the use of Realistic Mathematics Education approach enhanced students’ mathematics cognition and encourage students to engage actively in the teaching and learning of mathematics. Thus, Realistic Mathematics Education approach is an appropriate method to enhance the quality of teaching and learning process.
Delta, Diamond, and Fighter Kites Project in Geometry Class
Authors: Widodo S , Turmudi T , Rosjanuardi R
Published: December 2019

This research aims to develop teaching materials with didactical phenomenology in math education with the project of making Delta, Diamond and Fighter kites. This research carried out experiments conducted on various types of shapes to make Delta, Diamond, and the most ideal fighter kites based on theoretical of science. In addition, this study tested various materials to make kites. The results of the experiment show that the most ideal shape of the kite in order are, square, circle, rhombus, trapezoid, square, isosceles triangle and kite. While plastic is the most ideal material for making kites that depend on the mass of the material. with the phenomenon of the kites project can be used as teaching material in geometry class.
Population dynamics and feeding habits of Euthynnus affinis, Auxis thazard, and Auxis rochei in South Coast of East Java waters
Authors: Lelono Tri Djoko , Bintoro Gatut
Published: December 2019

Little tuna landed there are three types: Euthynnus affinis, Auxis thazard, Auxis rochei. The analysis shows the condition of the resource indicates the condition Over Exploited. Length and weight relationship tuna (Auxis thazard) total positive allometric Length of first caught fish (Lc) of 27.08 cm, The length at first maturity (Lm) 28.39 cm Lt
= 35.40 {1 − e
−0.58(t + 0.26)}, total mortality (Z) = 4.08 per year, Fishing mortality (F) = 2.91 per year, natural mortality (M) = 1.17 per year, with the Exploitation rate (E) = 0.71 per year which, if E> 0.5 is overfishing. The relationship between length and weight of Tuna (Euthynnus affinis) was unsexed W = 0.1078 L 3.48. The value of Lc and Lm were 37.51 cm, 38.43 cm, and 40.17 cm respectively. Von Bertalanffy growth Lt
= 72.50 {1 − e
−0.11(t +0.27)} equation of this study was. The rate of total mortality (Z), natural (M), and catch (F) were respectively 0.56, 1.74 and 0.01. The peak season tuna catch in PPN Prigi was occurred in September (515.865%) with the low season occurred in January (1.244%). As for UPT PP Muncar, the peak season cob arrest took place in March (316.315%) with famine in February (6,651%). Little Tuna food was consist of 7 groups, namely: small fish, shrimp, Ascomycota, Chloromonadophyta, Chyanophyta, Chrysophyta, and Chlorophyta.
Exploitation level of shortfin scads fish (Decapterus macrosoma) caught with purse seine in Bulukumba waters, South Sulawesi
Authors: Asni Andi , Ihsan  , Najamuddin  , Tauhid Mohammad
Published: December 2019

Shortfin scads fish is a pelagic fish that has an important role in the economic sector of fishermen in South Sulawesi waters. In the last five years, there has been a decline in catch resulting from uncontrolled exploitation. However, there is no control instrument for the exploitation of shortfin scads fish to date, hence, there is a concern that the sustainability of shortfin scads fish resources will be threatened. This study aimed to determine the exploitation level of shortfin scads fish (Decapterus macrosoma) caught with a purse seine. The research was carried out in the waters of Bulukumba Regency, South Sulawesi, from April to August 2018. The method used was direct observation. Data on catches were recorded based on the fish species caught at the time of hauling. Data time series of shortfin scads fish and effort data tabulated from fisheries statistical data. Maximum sustainable yield (MSY) of shortfin scads fish in Bulukumba waters in 2016-2017 exceeded the maximum sustainable production (MSY) of 10,739 tons/year (overfishing). The regression analysis between effort and CPUE Schafer model, showed the estimation parameter intercept value (a) 42.38620491, slope (b) -0.041823411. The equality relationship interpreted as the fishing effort for f units per year will reduce the production value (CPUE) of shortfin scads fish by 42,386 tons/year. The estimation of sustainable potential value (MSY) of shortfin scads fish in Bulukumba waters was 10,739 tons/year, while the optimum fishing effort (fopt) was 507 units/year and the total allowable catch (TAC) 8,591 tons/year.
Law enforcement for fisheries crime (illegal fishing) through a transcendental approach
Authors: Hanafi Muhammad Amin , Absori  , Dimyati Khuzaifah
Published: December 2019

The sea of North Maluku province geographically faced to the Philippine sea and it is a potential zone with the availability of export-grade fisheries resources. Criminal penalties in the fisheries sector are mostly cumulative, both aimed at offenses of crimes and offenses. Law Number 45 of 2009 concerning Amendments to Law Number 31 Year 2004 concerning Fisheries, states that what is called the practice of illegal fishing can be classified as: Article 84 paragraph (1), paragraph (2), paragraph (3), Article 85, Article 92, Article 93, and Article 94). In the case of being caught red-handed, by the authorities over which Fisheries Law No. 45 of 2009. The next problem in law enforcement is the issue of legal norms where the Act that is implemented still gives a gap for the occurrence of abuse of authority. Also, the next problem is culture in law enforcement and in society. The transcendental approach emphasizes the importance of this morality problem; Second, in terms of legal norms, it is necessary to formulate legal norms that are more deterrent to perpetrators of crimes and law enforcement officers who violate; and, third, in the matter of legal culture, it is necessary to change the legal culture which originally emphasized rational values into legal behavior based on transcendental values in Segulaha adat.
Repair technique for wooden fishing boats using fibreglass
Authors: Sunardi  , Sukandar  , Sulkhani Y E , Rahman M A
Published: December 2019

Almost all fishing boats operating in Indonesia are made of wood. The hulls of wooden boats are exposed to heat everyday and float in seawater, a combination which can cause parts of the boat’s hull to be quickly damaged. One type of damage that occurs all the time is the attachment of fouling organisms (animals and marine plants) which encrust the hull of the boat; therefore, the hull should be careened once a week, as otherwise resistance will increase, reducing the speed and increasing fuel consumption. Fibreglass is a composite material which is strong, weather resistant and easily formed. This composite material can be applied as a coating material for wooden boats to overcome weathering and repair leaks. This applied research directly practiced a method to repair wooden boats by coating with 2 layers of fibreglass. The stages included the removal of all fouling and other coatings (e.g. paint) and contamination, drying and repairs, coating with two layers of fibreglass, followed by finishing. The results showed that the use of fibreglass to repair wooden boats can be a very effective technique with the following advantages: boards of boat hulls that are immersed in water do not decay, so that there is less likelihood of leaks developing; the technique reduces outlay because maintenance costs of fishing boats are reduced; boat maintenance will be easier because it is only necessary to clean the fouling attached to the hull; longer boat life and greater hull strength, as protection with fibreglass can strengthen old wooden construction elements and enable them to last longer.
What Motivates Nurses to Exercise? Determinants of Physical Activity Among Canadian Nurses Using Self-Determination Theory
Authors: Zhang Karen M , Tulloch Heather E , Brunet Jennifer , Pipe Andrew L , Reid Robert D , Prince Stephanie A , Reed Jennifer L
Published: December 2019

Background

Nurses’ suboptimal physical activity (PA) levels place them at high risk for cardiovascular diseases. Little is known about the motivational factors that influence their PA behavior.

Purpose

This study drew on the Self-Determination Theory (SDT) to investigate whether associations between nurses’ levels of mood disturbance, psychological need satisfaction (competence, autonomy, and relatedness), and self-determined motivation predict levels of objectively assessed PA.

Methods

A total of 363 nurses recruited from 14 hospitals in the Champlain region of Ontario, Canada, wore ActiGraph GT3X accelerometers and completed standardized questionnaires assessing sociodemographic and work characteristics, mood disturbance, and SDT variables. Levels of moderate-to-vigorous intensity PA (MVPA) were measured in minutes/week in bouts ≥10 min. Data were analyzed using path analysis and multiple mediational model.

Results

The model predicting MVPA showed good fit to the data, χ 2 (4, n = 363) = 7.82, p = .10; comparative fit index = .991; Tucker–Lewis Index = .967; root mean square error of approximation = .051. Higher mood disturbance was associated with lower perceived competence (β = −.29, p = .002), autonomy (β = −.29, p = .002), and relatedness (β = −.19, p = .002). Lower perceived competence (β = .46, p = .003) and autonomy (β = .14, p = .011), as well as higher mood disturbance (β = −.16, p = .016), were associated with less self-determined motivation for PA. Lower self-determined motivation was associated with lower levels of MVPA among nurses.

Conclusions

Interventions targeting low mood, as well as perceived competence and autonomy in exercise, may promote MVPA among nurses and reduce cardiac risk.
Genetic Factors in Acute Myeloid Leukemia With Myelodysplasia-Related Changes
Authors: Fang Hong , He Rong , Chiu April , Viswanatha David S , Ketterling Rhett P , Patnaik Mrinal S , Reichard Kaaren K
Published: December 2019

Objectives

Acute myeloid leukemia with myelodysplasia-related changes (AML-MRC) is a heterogeneous category with a broad range of underlying genetic abnormalities. We investigated the significance of genetic factors in a large series of AML-MRC cases.

Methods

The morphologic findings, genetic data, and patient outcomes were assessed in 186 AML-MRC cases.

Results

The median overall survival (OS) was dismal in AML-MRC patients (median, 7.6 months; 95% confidence interval, 5-10.6 months). Karyotypically normal cases and cytogenetically abnormal cases without myelodysplastic syndrome (MDS)-related cytogenetic abnormalities showed similar OS, significantly better than cases carrying MDS-related cytogenetic abnormalities. MDS-related cytogenetic abnormalities, monosomal or complex karyotype, and history of MDS or myelodysplastic/myeloproliferative neoplasm were all associated with dismal outcome.

Conclusions

AML-MRC predicts a poor prognosis. Our study supports the finding that the genetic profile plays a key role in determining prognosis in AML-MRC as defined according to the World Health Organization revised fourth edition (2017) diagnostic criteria.
The determination of common anabolic steroid and stimulants in nutritional supplements by HPLC-DAD and LC-MS
Authors: Al-Khadhra Riyadh Salih
Published: December 2019

A high-performance liquid chromatography method employing a diode-array detector and mass spectrometry detector was developed, validated and implemented for determining Synephrine, Caffeine, Clenbuterol, Nandrolone, Testosterone and Methylhexaneamine in Nutritional supplements. The use of Nutritional supplements is widespread. Hazards relating to concentration, composition, individual contaminants, supplements interactions as well as positive doping results among athletes present increasing concerns regarding nutritional supplement consuming. The proposed method was validated according to the International Conference on the Harmonization of the Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH) standards. The proposed method observed to be accurate, linear, precise, sensitive, required minimal sample preparation and uncomplicated mobile phase. The implementation of the proposed method on nine commercial supplements shows that inaccurate labeling for some supplements regarding the concentration of the ingredients.
Alternative Silvicultural Approaches to Managing Jack Pine Plantations for Endangered Species Habitat and Forest Products
Authors: Gadoth-Goodman Daphna , Rothstein David E
Published: December 2019

Since the early 1980s, ca 1,550 hectares (3,800 ac) of high-density jack pine (Pinus banksiana) plantations have been established annually in northern Lower Michigan to serve as habitat for the federally endangered Kirtland’s warbler (KW; Setophaga kirtlandii). Because these plantations do not appear capable of producing merchantable sawlogs by their planned 50-year harvest age, we investigated the potential to implement reduced rotation lengths in these stands to produce biomass and/or pulpwood. We used space-for-time substitution to assess biomass and volume accrual over time, using our own locally derived allometric biomass equations. The predicted optimal rotation age for biomass was 20 years, and the predicted optimal rotation age for pulpwood volume was 28 years. We compared the total land area required for management under these rotation scenarios to continue establishing 1,550 hectares (3,800 ac) of KW habitat annually. Management on the current 50-year cycle requires ca 77,500 hectares (191,500 ac). Management for pulpwood would reduce this to ca 43,400 hectares (107,250 ac), and management for biomass would require ca 31,000 hectares (76,600 ac). Our results suggest that rotation lengths in these plantations could be substantially reduced, allowing for reductions in the total land area dedicated to warbler habitat, allowing for diversification of management at the landscape scale.