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Edumatsains
Published by Universitas Kristen Indonesia
ISSN : 25277642     EISSN : 25277235     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Education Mathematics Physics
Jurnal EduMatSains merupakan wadah untuk menampung dan mempublikasikan hasil karya baik berupa hasil penelitian maupun kajian teori yang original dalam ruang lingkup pendidikan matematika dan pendidikan sains (fisika, kimia, biologi) serta ilmu matematika dan ilmu sains (fisika, kimia, biologi) bagi semua civitas academika khususnya dosen, guru, peneliti dan mahasiswa. Jurnal EduMatSains terbit sebanyak dua kali dalam satu tahun (Juli dan Januari). Jurnal EduMatSains diterbitkan Oleh Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia.
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 1 No 2 (2017): Januari" : 8 Documents clear
Respon Anatomis Jagung (Zea mays L.) ‘Sweet Boy-02’ pada Perbedaan Intensitas Cahaya dan Penyiraman Hafidha Asni Akmalia; E. Suharyanto
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.236

Abstract

The difference of environmental condition makes the change of anatomical structure related to its growth. This phenomenon gives an information about maize’s adaptation. The aims of the research was to evaluate anatomical response of maize in different light and water treatment. This research used Randomized Completed Design with 3 regimes of light intensity ( L1 (63694); L2 (11408); L3(3897) Lux) and 3 regimes of watering (2 L/ 1,6 L/ and 1,2 L). Each combination was done with 3 replications. Maize was harvested in 75 days after treatment and the parts of plant including leaf, stem, and root were preserved using paraffin embedding method. The measured anatomical responses were leaf thickness; stomatal indeks; root and stem tracheal diameter. Data were analyzed by Anava and DMRT test with significance level of 5%. The results showed that the light intensity L1(63694 Lux) and watering W1(2 L) caused thicker leaf, the larger stomatal index and root’s tracheal diameter. The leaf thickness was 368,67 µm, stomatal index was 31,37 %, and root’s tracheal diameter was 176,10 µm in L1W1 treatment showing the value was the largest and different significantly than the other treatments. While, the stem’s tracheal diameter was not significant because the stem was the last part of plant affected by the treatment. Keywords : maize, Sweet Boy-02, anatomical response, adaptation.
Penggunaan Pasco Capstone 14.1 untuk Menentukan Koefisien Konveksi Udara dengan Metode Pendinginan Air Taat Guswantoro
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.241

Abstract

Water cooling occurs since the heat energy of water is transferred to the air. Water is placed in a thin transparant vessel can reduce the effects of heat transfer by radiation and conduction, so the most dominant heat transfer is convection. Newton's law of cooling states that the rate of cooling is directly proportional to the temperature difference between the object and room temperature. By knowing the value of constant cooling, the air convection coefficient can be calculated. This study using three different sizes of cups, each of which is filled with hot water. In each glass inserted temperature sensors that connected to the interface, recording the temperature every 60 seconds using pasco capstone 14.1. The resulting graph was analyzed by exponential regression, in order to find the value of constant cooling, from this value can be calculated the air convection coefficient. The research result shows air convection coefficient value of W/m2OC, that mean if there is an object that has an area of 1 m2 and 1OC higher than room temperature, the thermal energy of the object will be lost of 19.9 J for each second. Keywords: Water cooling, heat transfer, air convection coefficient.
Boesenbergia rotunda (L.). Mansfeld: Manfaat dan Metabolit Sekundernya Marina Silalahi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.237

Abstract

Boesenbergia rotunda (L.). Mansfeld, or temu kunci is native plant in Indonesia, which is used as medicine, vegetables, and spices. The use of plants as medicine and spices relates to its compounds of secondary metabolites. This article aims to explain the uses and bioactive compounds of B. rotunda. This article is based on literature offline and online media. Offline literature used the books, whereas online media used Web, Scopus, Pubmed, and scientific journals. Boesenbergia rotunda have flavonoids (chalcones, flavanones, and flavones) and essential oils (terpinene, geraniol, camphor, α-ocimene, 1,8-cineole, myrcene, borneol, camphene, methyl cinnamate, terpineol, geranial, and neral. The essential oil founded on B. rotunda produces a distinctive odour, so that are used as antipyretic, aroma theraphy, and analgesic. Flavonoids of B. rotunda have been used as an anti-HIV-1, antitumor, anti-inflammatory, anti-oxidative, anti-cancer, anti-obesity, and anti-microbial. Extract of B. rotunda resulted lysis of membranes and walls microbial. The uses of extract of B. rotunda as antiobesity because its to increase the activity of enzymes involved in lipid catabolism. Keywords: Boesenbergia rotunda, essential oils, flavonoids, anti-microbial
Pengaruh Model Pembelajaran Kooperatif Tipe Think Pair Share (TPS) dengan Bantuan Praktikum Terhadap Hasil Belajar Fisika Yola Allan Sembiring; Destiniar Zagoto
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.242

Abstract

The research purpose to know the Influence of cooperative learning type Think Pair Share (TPS) with practical assistance to the learning outcomes of students in physics class X SMA ANGKASA 1 Jakarta Timur. Type of research is a quasi experimental design using pretest-posttest-control-group design. Sampling using cluster random sampling, acquired two classes, X MIA 1 into experimental class and class X MIA 2 as control class. The instrument comes in the form of multiple choice tests. From the research results obtained by the test value gain on an experimental class of 0.74 which is in the high category and control class is 0.43 which is in the low category. Based on t-test with SPSS version 16, the obtained results sig. (2-tailed) was 0.000 <0.05, so it can be expressed Ha is accepted and Ho is rejected. There can be concluded that the significant influence of cooperative learning model TPS to learning outcomes. Keywords: cooveratif, Think Pair Share, quasi eksperimental, learning outcome.
Studi Perbandingan Pemilihan Fitur untuk Support Vector Machine pada Klasifikasi Penilaian Risiko Kredit Desri Kristina Silalahi; Hendri Murfi; Yudi Satria
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.238

Abstract

Credit scoring is a system or method used by banks or other financial institutions to determine the debtor feasible or not get a loan. One of credit scoring method is used to classify the characteristics of debtor is Support Vector Machine (SVM). SVM has an excellent generalization ability to solve classification problems in a large amount of data and can generate an optimal separator function to separate two groups of data from two different classes. One of the success using SVM method is dependent on features selection process that will affect the level of classification accuracy. Various methods have done to features selection, because not all the features are able to give best classification results. Features selection that used this study is Variance Threshold, Univariate Chi - Square, Recursive Feature Elimination (RFE) and Extra Trees Classifier (ETC). Data in this study use secondary data from the database in UCI machine learning responsitory. Based on simulations to compare the accuracy of using feature selection method on SVM in classification ofcredit riskscoring, obtained that Variance Threshold and Univariate Chi – Square method can decrease accuracy while RFE and ETC method can increase accuracy. RFE method gives better accuracy. Keywords: Credit scoring, Credit risk, Feature selection, Support vector machine
Analisa Jembatan Garam untuk Meningkatkan Kestabilan Termal Enzim Xilanase Aspergillus niger Nya Daniaty Malau; Manogari Sianturi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.243

Abstract

Enzymes are the same biomolecules such as proteins, has only a functional difference. Enzymes are biocatalyst that recently applied to many industrial fields. To be applied in the field of industrial enzymes should be enhanced stability against temperature. Analysis of the salt bridge is able to demonstrate the potential of residues mutated to improve thermal stability. Molecular dynamics simulations performed by observing the unfolding process. Variations in temperature used is 400 K, 450 K and 500 K, respectively performed for 2.5 ns. Then analyzed the pair a salt bridge is formed. There are 25 pairs of salt bridges at a temperature of 400 K, 24 pairs of salt bridges at a temperature of 450 K, and there are 30 pairs of the salt bridge is formed at a temperature of 500 K. To determine the salt bridge partner is a key enzyme kesstabilan we then plotted salt bridge between distances (Ã… ) with time (ns) only at a temperature of 500 K, for allegedly at these temperatures has been a process of unfolding. Of the 30 pairs of the salt bridge that had plotted the distance with time, the pair obtained a salt bridge that pattern similar to the pattern chart graph analysis Root-mean-square deviation (RMSD). There are three curves salt bridge that pattern is similar to the pattern of RMSD curve and SASA, namely the salt bridge Glu84-Arg134, Asp104-Arg134 and Asp113-Arg115. The sharp rise in the value of RMSD and the resulting rupture SASA three pairs of the salt bridges. So when carried mutations in-silico candidate mutants that will be transferred is the amino acid residues are thought to play a role in electrostatic interactions and replace it with another amino acid residue on the basis of structural similarities. Keywords: Salt bridge, Electrostatic bond, Mutation, Unfolding
Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe Two Stay-Two Stray (TS-TS) terhadap Hasil Belajar dan Aktivitas Belajar Siswa pada Pokok Bahasan Koloid Leony Sanga Lamsari Purba
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.239

Abstract

This study aims to determine the effect of the application of cooperative learning model two stay-two stray towards learning outcomes and learning activities of students on the subject of colloids in the 2nd half of class XI SMAN 2 Sidikalang. This type of research is an experimental research. The study population was all students in grade XI natural sciences at SMAN 2 Sidikalang. Samples were taken at random as much as 2 classes and student samples randomly assigned 40 people per class. This study uses the initial and final test design randomized control group, where both classes were given a different treatment, a class using Learning Model Two Stay-Two Stray, and one other class using conventional learning model in the form of group discussions. Based on the results of data processing, obtained an average improvement of learning outcomes in the experimental class = 70.00%, while the control class = 46.32%. Testing the hypothesis on learning outcomes is done by using the t test (the test right) with α=0.05, db = 78 obtained t (3.98)> t table (1.68). This indicates that the t arithmetic is outside the reception Ho Ha accepted meaning. Likewise with the hypothesis of the learning activities of students, Ho was rejected because at α = 0.05, db = 78 obtained t (2.87)> t table (1.68)., It can be stated that there is the effect of the application of cooperative learning model two stay-two stray towards learning outcomes and learning activities of students on the subject of colloids in the 2nd half of class XI SMA N 2 Sidikalang. This type of research is an experimental research. The study population was all students in grade XI natural sciences at SMAN 2 Sidikalang. Results of processing data correlate with the learning outcomes of students learning activities obtained positive correlations were low and the experimental class is r = 0.44. Keywords : Cooperative Learning Model’s, Two Stay-Two Stray, Learning of Activities
Pengaruh Model Pembelajaran Kooperatif Tipe Numbered Heads Together Berbantuan Alat Peraga Sederhana Terhadap Hasil Belajar Fisika Siswa Kelas XI Septina Severina Lumbantobing
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 2 (2017): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i2.240

Abstract

The research aim to know the influence of cooperative learning model NHT aided props to the learning outcomes of students in the subject matter physics kinematics with vector analysis. The method used is a quasi-experimental research design with pretest posttest control group design. This research was conducted in SMA Angkasa 1 Jakarta XI in the academic year 2016/2017. Sample studies class XI-2 as the control class and class XI-3 as the experimental class with cluster random sampling technique. Instruments used multiple choice that has been tested for validity and reliability. The results of this study concluded that cooperative learning NHT aided simple props affect the learning outcomes of students in the material physics kinematics with vector analysis. This can be seen from the calculation results of hypothesis testing via t-test at a significance level of 5% and dk = 66 result Sig. (2-tailed) <0.05, so it can be stated that Ho refused and Ha is received and also the results showed an average gain of 55% experimental class and control class 20%. This is also supported high student activity. The percentage of student activity experimental group included active category of 94% and 6% inactive category. while the control class that includes active category of 67.5% and 32.5% inactive category. The response of students to cooperative learning model NHT aided simple props reach 92%. Keywords: learning outcomes, cooperative learning, model NHT, props

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