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All Journal IJCCS (Indonesian Journal of Computing and Cybernetics Systems) Bulletin of Electrical Engineering and Informatics Edumatsains E-Dimas: Jurnal Pengabdian kepada Masyarakat Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) POLYGLOT JOHME: Journal of Holistic Mathematics Education JTAM (Jurnal Teori dan Aplikasi Matematika) ComTech: Computer, Mathematics and Engineering Applications Jurnal Teknologi Informasi dan Multimedia Indonesian Journal of electronics, electromedical engineering, and medical informatics Jurnal Pengabdian Masyarakat eProceedings of Engineering Community Service Seminar and Community Engagement (COSECANT) Jurnal Nusantara Mengabdi Jurnal Rekayasa elektrika
Desri Kristina Silalahi
Universitas Telkom
Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Other

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Journal : Edumatsains

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Peningkatan Hasil Belajar Kognitif Siswa dengan Menggunakan Metode Numbered Heads Together (NHT) dalam Pelajaran Biologi Kelas VII di SMPK Medan Allo, Leticya Sarung; Silalahi, Desri Kristina
EduMatSains Vol 1, No 1 (2016): Juli 2016
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Kristen Indonesia

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Abstract

Students grade VII’s cognitive learning outcomes at SMPK Medan were relatively low. It was caused by many factors, one of them was the learning method which was still conventional. Students were needed to improve their learning outcomes, so the researcher made the research with purpose was to know the improvement ofstudents’ learning outcomes by using Numbered Heads Together (NHT) method. The research methodology was used quasi experimental with nonequivalent control group design. The samples of this research were students at grade VII A and VII B. Grade VII B as experimental class and grade VII A as control class. Both of the classes were given treatment, the experimental class with NHT and control class with conventional learning. The improved of learning outcomes can be seen from the mean of N -Gain in experimental class was 0.39 in middle category and the control class was 0.09 in low category. The control class and experiment class had different learning result significantly. Based on the research, it can be concluded that this method can increased students’ learning outcomes at grade VII at SMPK Medan.
Penerapan Pendekatan Pendidikan Matematika Realistik Indonesia (PMRI) untuk Meningkatkan Kemampuan Penyelesaian Soal Cerita pada Kelas VII A SMP UTY Idris, Invany; Silalahi, Desri Kristina
EduMatSains Vol 1, No 1 (2016): Juli 2016
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Kristen Indonesia

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Abstract

AbstractMathematical problem solving in the form of word problems is very helpful in dailystudent life because this problems always related to daily life. Problems encountered in this research, it was found that the students are less capable in solving word problems. This matter  because students had not been given exercises in the form of word problems. To improve the students ability in solving word problems, researcherapply Indonesian Realistic Mathematics Education Approach (PMRI). This research aims to determine that the application PMRI approach can enhance the students ability in solving word problems and find out how the application PMRI in mathematic. This research is a classroom action research (CAR) conducted in SMP UTY, the Christian school located in t Medan. Based on the research results obtained, it is known that the application PMRI approach can enhance the students ability in solving word problems, although indicators of success has not been achieved in this study.
Penerapan Pendekatan Pendidikan Matematika Realistik Indonesia (PMRI) untuk Meningkatkan Kemampuan Penyelesaian Soal Cerita pada Kelas VII A SMP UTY Invany Idris; Desri Kristina Silalahi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 1 (2016): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i1.71

Abstract

Mathematical problem solving in the form of word problems is very helpful in dailystudent life because this problems always related to daily life. Problems encountered in this research, it was found that the students are less capable in solving word problems. This matter because students had not been given exercises in the form of word problems. To improve the students ability in solving word problems, researcherapply Indonesian Realistic Mathematics Education Approach (PMRI). This research aims to determine that the application PMRI approach can enhance the students' ability in solving word problems and find out how the application PMRI in mathematic. This research is a classroom action research (CAR) conducted in SMP UTY, the Christian school located in t Medan. Based on the research results obtained, it is known that the application PMRI approach can enhance the students ability in solving word problems, although indicators of success has not been achieved in this study. Keywords: Realistic mathematics education, Ability to solving word problems
Peningkatan Hasil Belajar Kognitif Siswa dengan Menggunakan Metode Numbered Heads Together (NHT) dalam Pelajaran Biologi Kelas VII di SMPK Medan Leticya Sarung Allo; Desri Kristina Silalahi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 1 (2016): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i1.72

Abstract

Students grade VII’s cognitive learning outcomes at SMPK Medan were relatively low. It was caused by many factors, one of them was the learning method which was still conventional. Students were needed to improve their learning outcomes, so the researcher made the research with purpose was to know the improvement ofstudents’ learning outcomes by using Numbered Heads Together (NHT) method. The research methodology was used quasi experimental with nonequivalent control group design. The samples of this research were students at grade VII A and VII B. Grade VII B as experimental class and grade VII A as control class. Both of the classes were given treatment, the experimental class with NHT and control class with conventional learning. The improved of learning outcomes can be seen from the mean of N -Gain in experimental class was 0.39 in middle category and the control class was 0.09 in low category. The control class and experiment class had different learning result significantly. Based on the research, it can be concluded that this method can increased students’ learning outcomes at grade VII at SMPK Medan. Keywords: NHT, conventional learning, learning outcomes
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
Pengaruh Pembelajaran Responsi Pada Mata Kuliah Kalkulus II Terhadap Hasil Belajar Mahasiswa Program Studi Pendidikan Matematika FIP UPH Desri Kristina Silalahi; Dylmoon Hidayat; Jacob Stevy Seleky; Oce Datu Appulembang; Robert Harry Soesanto
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.v3i2.887

Abstract

The achievement of the graduates profile which is the goal of Mathematics Education majors Teachers College UPH is to prepare teacher candidates who have the character, calling, and competence also the graduates can role as a Mathematics teacher know the concept of knowledge. However, in the achievement of the graduates profile has not been satisfactory, because results of learning are low in some mathematics courses, especially in Calculus II course. Based on the problem, major Teachers College do a structured academic activity that is response learning. The research method used is control group posttest only design. The sample of the research are the students of Mathematics Education major that take the Calculus II course in the academic year 2015/2016 as the control group and who take the Calculus II course in the academic year 2016/2017 as the experimental group. The improvement of this reponse learning result is seen from t-test analysis, obtained the decision of hypothesis test is exist significant difference between the control class and the experimental class. Keywords : response, calculus II, learning result
Co-Authors Achmad Rizal Agnes Christy Margareth Rumapea Ahmad Akbar Khatami Ahmad Alfi Adz Dzikri Avrilya, Nadya Ainun Bandiyah Sri Aprillia Basuki Rahmat Masdi Siduppa Bhaskara Perteka Yuda, Putu Krishna Dandi Trianta Barus Dien Rahmawati Dylmoon Hidayat Eka Afrima Sari Ekki Kurniawan Erdian, Mochamad Aldyn Faris Fadhlur Rachman Hendri Murfi Hirmawan, Ramadhan Husayn Aththar Adhari Husneni Mukhtar Ig. Prasetya Dwi Wibawa Invany Idris Invany Idris, Invany Irwan Purnama Jacob Stevy Seleky Jangkung Raharjo Jaspar Hasudungan Kharisma Bani Adam Khilda Afifah Ledya Novamizanti Leticya Sarung Allo Leticya Sarung Allo, Leticya Sarung Maria Octaviana Melda Jaya Saragih, Melda Jaya Mohamad Ramdhani Muhammad Agung Foury Rigoursyah Muhammad Hablul Barri Muhammad Irfaan Hadi Muhammad Rayhan Ghifari Oce Datu Appulembang, Oce Datu Porman Pangaribuan Putri, Nabila Hatami Saputra, Prima Bagus Sheizi Prista Sari Soesanto, Robert Harry Sony Sumaryo Sudiana Sudiana, Sudiana Susilawati, Yuni Eka Syafiq, Muhammad Ihsan Triananda, Annisa Wahmisari Priharti Wibowo, Muhammad Saddam Yendi Surya Agung Yudi Satria Zainal Abidin Pane