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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 234 Documents
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Peningkatan Kemampuan Bertanya dan Pemecahan Masalah Peserta Didik SMA dalam Pembelajaran Fisika Melalui Problem Based Learning Godelfridus Hadung Lamanepa; Isabel Coryunitha Panis
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

This study aims to improve the ability to ask questions and problem solving skills of learners in the learning of physics through Problem Based Learning. This research is a classroom action research with two cycles in learning using problem based learning. Data collection techniques used to determine the ability to ask is by observation while for problem-solving skills using the test. Subjects in this study were students of Senior High School X class at St. Seminary Rafael Oepoi Kupang Academic Year 2017/2018. The results showed that: (1) there was an increase in the ability to ask learners in the second cycle; (2) there is an increase of mean value of problem solving ability of learners gradually that is from 68 at initial test, 72 at cycle I and 77 in cycle II. Keywords— Questioning skills, Problem Solving skill, PBL
Analisa Tingkat Kebisingan Taman Bermain Anak di Timezone Mall Nya Daniaty Malau; Angela Delviani Jehadun
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

Noise is one of the waveforms that can be heard by human hearing. Truth is the activation of sound that can not be done. The effect of sound on humans not only affects the auditory organ, but also can affect other organs, such as narrowing of blood vessels and heart system. Truth caused by transportation is very disturbing but not all of it is caused by transportation. Wisdom can also occur in public places or facilities such as hospitals and children's playgrounds, one of the children's and children's favorite theme parks is TimeZone Mall. You can do research to measure and learn the level of playground at TimeZone Mall Taman Anggrek and TimeZone Tamini Square. The average measured result of 6 readings with calculations per 60 minutes in the orchid mall's time zone is 70.5 dB and the tamini square time zone is 65.33 dB. In the time zone of the orchid mall park and the tamini square time zone there is no value beyond the threshold limit (85 dBA). With no measurement results exceeding the workspace limits for uninterrupted or preventive work. Keywords: Noise, Timezone Mall, playground, sound
Sensitivitas Ligan Ditizon terhadap Absorbsi Logam Zink dengan Teknik Emulsi Membran Cair Nelius Harefa
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

Contamination by zink metal can cause death in humans, animals, and plants. one of the uniqueness of this metal is that it can accumulate. consuming it at a low concentration does not cause death but if it happens continuously it will accumulate into high concentrate which can cause death. Ligand ditizon is one of the ligands which can absorb zink metal at low concentration, to be more efficient then used the liquid membrane emulsion technique which enables separation without going through the process of precipitation. Variations of concentration used is 1:3 v/v, 1:1 v/v and 3:1 v/v. Optimum absorption occurs at concentrations 1:3 v/v are 90.77%. Variations of liquid membrane emulsion duration used is 5 minute, 10 minute and 15 minute. Optimum absorption at duration 5 minute are 50.22%. Optimum absorption on the interaction between concentration and liquid membrane emulsion duration are 43.73% obtained F (392.76) > Ftable (14.80). Keywords: ditizon, absorption, emulsion liquid membrane
Keanekaragaman Tumbuhan Pekarangan dan Pemanfaatannya Untuk Prasarana Pembelajaran Di Sekolah PSKD 1 Jakarta Sebagai Salah Satu Usaha Konservasi Marina Silalahi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

The research on the diversity of yard plants and their utilization for learning infrastructure at the PSKD 1 school in the Jakarta to the conservation efforts. in The research was conductedat the January-April 2018through two step arethe exploration in the yard of PSKD 1 School 1 and interviews with thebiology teachers and Deputy Head. The plants found were recorded in local names, habits, and use. The data obtained were processed by using descriptive statistics. There were 93 local names of plants found in the PSKD 1Schoolyard in the Jakarta, which consisting of 86 species names belonging to 67 genus and 33 families. The Araceae, Asparagaceae, Arecaceae, and Moraceae are the families with the largest number of species are 14, 10, 5 and 5 species respectively. In the biology study the plants in the yard are utilized in the biodiversity, ecological and plant morphology materials. The pinus (Pinus merkussi) and jamblang (Syzygium cumini) are the plants that to be difficult to find in Jakarta, but still found in the PSKD school yard. To maintain the sustainability of the plant needs to be multiplication through seeding and cuttings. Keywords: Shcool yard, PSKD, Pinus merkussi, Syzygium cumini
Perbedaan Peningkatan Kemampuan Pemecahan Masalah Matematika dengan Pendekatan Contextual Teaching and Learning di Kelas X Agus Junsion Naibaho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

One of the changes in learning paradigm is the teacher centered learning centered student centered; the methodology which was originally more dominated by expository switches to participatory; and a more textual approach turns contextual. Reality seen in the field, students only memorize the concept and are less able to use the concept if it encounters real life problems related to the concept. The purpose of this research is to know the difference of improvement of problem solving problem of student mathematics with CTL approach on material of two linear equation system in class X SMA Negeri 1 Dolok Batu Nanggar. Population in this research is all student of class X SMA Negeri 1 Dolok Batu Nanggar T.A. 2017/2018, which consists of 10 parallel classes with an average number of students per class is 30 people. This study was conducted on two classes representing the population and has the same characteristics. Sampling and sample class determination in this study was taken randomly, using random sampling technique with the consideration that the characteristics of the class that the population is the same. Class X-10 as control class and X-3 class as experiment class. The test used to obtain data is a description form. The data in this study were analyzed by using inferential analysis statistical analysis. Inferential analysis of data is done by t-test. The results showed that there was an improvement in problem-solving ability with conventional approach with better contextual approach Keywords : Problem Solving Abilities, Contextual teaching and learning Approach.
Pengaruh Perlakuan Panas terhadap Sifat Magnetik, Permitivitas dan Permukaan Komposit Ba(2-x)La(x)Fe2O5 ( x = 0,3 dan 0,5 ) Patricius Purwanto; Ade Mulyawan; Yosef Sarwanto
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

Composite of Ba(2-x)La(x)Fe2O5 has been made by powder metallurgy techniques. Ba(2-x)La(x)Fe2O5 were made with mixing of BaCO3, La2O3 and Fe2O3 with a specific weight ratio. The materials composite tobe made with the technique of powder metallurgy with milling method for 2 hours and heat treatment at 800 °C, 900 °C and 1000 °C for 5 hours. After the heat treatment tobe done characterization with using Scanning Electron Microcope ( SEM ) to observe the surface morphology and magnetic properties with Vibrating Sample Magnetometer (VSM) to study the magnetic properties. The composite of Ba(2-x)La(x)Fe2O5 show that the magnetic moment and the magnetic field strength decrease with increasing temperature sintering. Permittivity of Ba(2-x)La(x)Fe2O5 relatif stable af frequence 1 Hz to 100 kHz. The results of surface morphology is known that the morphology of the granulars of composite Ba(2-x)La(x)Fe2O5, regular grains with increasing temperature of sintering, the spectrum EDS (Energy Dispersive Spectroscopy) showed some dominant element indicate that is have same phase of analysis and formation composite magnetic. The composite of Ba(2-x)La(x)Fe2O5 show that the magnetic moment and the magnetic field strength decrease with increasing temperature sintering Keywords: Composite Ba(2-x)La(x)Fe2O5, magnetic, pearmitivity, surface.
Meningkatkan Pemahaman Siswa tentang Teorema Pythagoras dengan Kotak Musik Spiral Theodorus Maslina Simanjuntak
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 1 (2018): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

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Abstract

The background of this journal is because of the low understanding level of students regarding the Pythagoras theorem. It is visile from the inability of students in deciding the Hypotenuse on right triangle and students often see the Pythagoras theorem formulas as a same. Even though both formulas may not be the same, they must firstly be defined what does it mean a,b,c. Writer is interested in solving those problems by using Spiral Theodorus music box as instructional media. The basic concept that writer use during the making of this media is to connect the Pythagoras concept with Spiral Theodorus. It is because writer think Spiral Theodorus use Pythagoras concept. This musix box can be used everyday by students so that the more often student used and see the Spiral Theodorus music box, the more they will increase their understanding about Pythagoras theorem. Keywords: Pythagoras, Kotak Musik Spiral Theodorus.
Induksi Kalus Krisan (Chrysanthemum morifolium Ramat.) dengan Penambahan Berbagai Kombinasi Zat Pengatur Tumbuh (ZPT) Tia Setiawati; Alma Ayalla; Anandira Witri
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 2 (2019): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v3i2.884

Abstract

Chrysanthemum is an ornamental plant that contains many secondary metabolites such as flavonoids and various volatile compounds that have the potential as medicinal ingredients. Production of secondary metabolites from plants can be carried out in vitro through callus culture. The purpose of this study was to determine the effect of Plant Growth Regulators (PGR) combination on callus formation from explants of leaves and stems of Chrysanthemum plantlets in Murashige & Skoog (MS) media. The study was conducted using a Completely Randomized Design (CRD) with a single factor in the form of 10 combinations of 2,4-D + kinetin for callus induction from stem explants and 12 combinations of NAA + BAP for callus induction from leaf explants. Observations were conducted on two months after planting. Observation data were analyzed descriptively. The results showed that callus formation occurred both from stem and leaf explants in all treatment combinations.In the group of stem explant, a combination of 3 `ppm 2,4-D + 2 ppm kinetin resulted in the highest average of callus size, wet weight, and dry weight, ie 13 (clay models); 1.186 grams; 0.316 grams respectively with a compact texture and light green, brownish dark green.Pada kelompok ekpslan daun, kombinasi 1 ppm NAA + 1 ppm BAP rata-rata ukuran, berat basah dan berat kering kalus tertinggi berturut-turut sebesar 17 (skala clay models); 1,3921 gram dan 0,1024 gram dengan tekstur kompak dan berwarna hijau muda.In the leaf explant group, a combination of 1 ppm NAA + 1 ppm BAP, the highest average of size, fresh weight and dry weight of callus at 17 (clay models); 1,3921 grams and 0.1024 grams with compact texture and light green color. Keywords: Chrysanthemum morifolium, calli, NAA, BAP, kinetin
Peningkatan Sikap Positif dan kemampuan Berpikir Kreatif Siswa dengan Pendekatan RME pada Materi Aritmatika Sosial di Kelas VII SMP Swasta Trisakti Pematangsiantar Agus Junsion Naibaho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 2 (2019): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v3i2.889

Abstract

Mathematics is an important lesson, especially because mathematics can be used in everyday life to solve problems. But this is not the case when met in the field, one of the 'popular' subjects as a less desirable subject is mathematics. Furthermore, creative thinking is the ability to make new combinations, based on data, information or elements that exist. The objectives in this study were: To determine the improvement of creative thinking skills and positive attitudes of students by using the realistic mathematical education (RME) approach in learning mathematics at the Trisakti Private Middle School Pematangsiantar T.A. 2018/2019. This research is a quasi-experimental study. The population in this study were all seventh-grade students of Pematangsiantar Trisakti Private Middle School, which consisted of 3 parallel classes with an average number of students per class of 30 people. From 3 class VII parallel, students were selected as a sample of 1 class to be used as Experimental class, namely Class VII-A. Hypothesis testing uses Paired-Samples t-Test with a significance level of 0.05. Test criteria if α> Sig. (2-tailed) then reject Ho and Ha accepted. The results showed that there was a significant increase in positive attitudes with RME in social arithmetic material in class VII of Pematangsiantar Trisakti Private Middle School, there was a significant increase in the ability to think creatively with the RME approach to social arithmetic material in class VII Pematangsiantar Trisakti Private Middle School. Keywords : Positive Attitudes, Creative Thinking Skills, Realistic Mathematical Education
Hibiscus rosa-sinensis L. dan Bioaktivitasnya Marina Silalahi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 3 No 2 (2019): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v3i2.885

Abstract

Hibiscus rosa-sinensis L. has been long used as medicine, ornamental plants, and foodstuffs. The plants uses as foodstuffs have nutritional or improve the taste, while the plants used as medicine have biocytivity compounds. This article was written based on a review of vary scientific articles and books published online and offline related to the use of H. rosa-sinensis. Hibiscus rosa-sinensis is a plant originating from China and has around 300 hybrids, which structures of corolla has vary in color and shape. In the traditional medicine of H. rosa-sinensishas been used to cure of the hypertension, diabetes mellitus, wounds, menstrual disorders, and abortion. The bioessay of H. rosa-sinensis has activity as recovery of heart disolder, hypertension, diabetes mellitus, antioxidants, antifertility, anti ulceration, and kidney disorders. Keywords: Hibiscus rosa-sinensis, hypertension, antifertility, abortion.

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