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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Journal of Education and Instruction (JOEAI)
Sihombing, Susi
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Humanities Earth & Planetary Sciences Languange, Linguistic, Communication & Media Social Sciences

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Trophic State of the Bakuok Lake, Aur Sati Village, Tambang District, Kampar Regency, Riau Province Based on Trophic State Index (TSI) Sihombing, Susi; Simarmata, Asmika Harnalin; Siagian, Madju
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTSeveral activities in  Bakuok Lake contributed the input of organic and anorganic matter that affects the water quality, especially nutrient concentration in waters. A research aims to understand the trophic state of  Bakuok Lake based on TSI has been conducted in June-July 2019. There were three stations namely station 1 (plantation area), station 2 (residential area) and station 3 (fish cage area).In each station, there were 2 sampling points, in the surface (0.15 m) and 2 Secchi depth (1.74 m). Sampling were conducted 3 times, once/week. Water quality parameters measured were total phosphate, chlorophyll-a, transparancy, dissolved oxygen, CO2,pH and temperature. The value of water quality is as follows: the total phospatewas 0.10-0.22 mg/L, chlorophyll-a12.00-14.43 µg/L, transparency:58-87 cm, dissolved oxygen:6.57-7.54 mg/L, CO2:9.37-13.86 mg/L, pH: 5, temperature:29-31oC and TSI (Trophic State Index) value: 62.54-68.00. Based on TSI value, the Bakuok Lake can be categorized asmoderate to eutrophic.Keywords:Kampar River,Eutrophic, Oxbow Lake, Water Quality
Investigasi Minat dan Motivasi Belajar Matematika Siswa SMP dalam Pembelajaran Daring di Era Pandemic Covid-19 Silalahi, Lulu Brygita; Sihombing, Susi; Purba, Tuty Novelinda; Marpaung, Riko Kurniawan; Sinaga, Wita; Tambunan, Hardi
JOEAI (Journal of Education and Instruction) Vol. 4 No. 2 (2021): JOEAI (Journal of Education and Instruction)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/joeai.v4i2.2810

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This study aims to investigate the interest and motivation in learning mathematics for junior high school students during online learning during the Covid-19 pandemic in depth and to explore the faktors that influence students' interest and motivation in learning using triangulation techniques, namely observation and interviews. This research uses descriptive qualitative research method with the type of case study research. This research was conducted at SMP Negeri II Dolok Pardamean, Simalungun Regency. The population in this study were all seventh grade students for the 2020/2021 academic year at SMP Negeri II Dolok Pardamean. The sample used was all students of class VII-1, then 3 students were selected for the 2020/2021 academic year. Based on the results and discussion of the research, it shows that most of the seventh grade students of SMP Negeri II Dolok Pardamean have high interest and motivation in learning mathematics, which is indicated by the average percentage of students' interest and motivation in learning mathematics, which is 76.46%. In conclusion, online learning that has been carried out at SMP Negeri II Dolok Pardamean has succeeded in increasing interest and motivation in learning mathematics for grade VII-1 students and is in the high category. The success faktor in increasing students' interest and motivation in learning is influenced by teachers and students' family support. Keywords: Online learning, interest in learning, students' motivation to learn mathematics, the covid-19 pandemic
Analisis Kemampuan Self-Efficacy Siswa pada Pembelajaran Kooperatif Tipe Jigsaw Purba, Tuty Novelindah; Sihombing, Susi; Silalahi, Lulu; Sinaga, Wita; Marpaung, Riko; Panjaitan, Simon; Hutauruk, Agusmanto
JOEAI (Journal of Education and Instruction) Vol. 4 No. 2 (2021): JOEAI (Journal of Education and Instruction)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/joeai.v4i2.2832

Abstract

This study aims to analyze the ability of self-efficacy using the jigsaw cooperative model, including (1) student self-efficacy after jigsaw cooperative learning and (2) the level of active student activity during the learning process. This research is a qualitative descriptive study. The subjects in this study were 34 students of X-IPA2 N 1 PAGARAN and the object of this research was the students' self-efficacy abilities and active student activities. The instrument used consisted of a self-efficacy questionnaire, student activity observation sheets, and interview guidelines. Data analysis used the Mile and Huberman model. The results showed that the self-efficacy of 34 students obtained high self-efficacy of 26.47%, moderate self-efficacy of 61.76% and low self-efficacy of 11.76%. Overall self-efficacy of students is 73.31 in the medium category. Conclusions, based on the data obtained, students' thinking processes on abilities; 1) The self-efficacy of SMA N 1 PAGARAN students after jigsaw type cooperative learning is good; 2) The overall percentage of active student activities used during teaching and learning activities is within the specified ideal time tolerance interval. Keywords: active student activity, ability, jigsaw cooperative type, self-efficacy
Co-Authors Asmika Harnalin Simarmata Hutauruk, Agusmanto Madju Siagian Marpaung, Riko Marpaung, Riko Kurniawan Panjaitan, Simon Purba, Tuty Novelinda Purba, Tuty Novelindah Silalahi, Lulu Silalahi, Lulu Brygita Sinaga, Wita Tambunan, Hardi