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Analisis Bakteri Coliform pada Budidaya Ikan Batak (Neolissochilus sumatranus) di Perairan Danau Toba Herna Febrianty Sianipar; Apriani Sijabat; Christa Voni Roulina Sinaga; Ewin Handoco; Mardame Pangihutan Sinaga; Tambos Sianturi
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.5940

Batak fish (Neolissochilus sumatranus) is an endemic fish to North Sumatra Province, especially in Lake Toba. Currently, Batak fish are categorized as endangered due to overfishing and their habitat is starting to be damaged, so conservation efforts need to be made, one of which is from microbiological analysis of water found in the aquatic environment in Batak fish farming. This study aims to determine the quality of water in Batak fish farming in terms of aquatic microbiology. This descriptive research was conducted in Lake Toba waters, using random purposive sampling at 4 stations, namely: Parapat, Ajibata, Gorat, and Haranggaol Lake Toba, North Sumatra Province. Microbiological analysis was carried out at the Water Resources Management Laboratory, Faculty of Mathematics and Natural Sciences, University of HKBP Nommensen Pematangsiantar. The results showed that the bacteria found in Batak fish farming in Lake Toba waters were fecal coliform bacteria with numbers at station 1 (360/100 ml), station 2 (830/100 ml), station 3 (1310/100 ml), and station 4 (1110/100 ml). In general, the quality of Batak fish aquaculture water does not meet water quality standards, because the content of fecal coliform bacteria is above the 1000/100 ml quality standard.

Sosialisasi Peningkatan Kemampuan Literasi Bahasa Inggris Dengan Metode Problem Based Learning Mungkap Mangapul Siahaan; Sanggam Siahaan; Rudiarman Purba; Asima Rohana Sinaga; Apriani Sijabat; Herna Febrianty Sianipar; Christa Voni Roulina Sinaga; Ropinus Sidabutar; Partohap Sihombing
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 1: Januari 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i1.1261

Improving writing skills is as supporting factor for the success of learning carried out by each teacher. Writing ability comes from the habit of reading and analyzing problems in learning that is carried out every day. The culture of writing is still far from being a habit for teachers of SMP Negeri 3 Jorlang Hataran. Therefore, the University of HKBP Nommensen Pematangsiantar University team has carried out a community service at SMP Negeri 3 Jorlang Hataran, Jalan Besar Parapat, Nagori Bah Sampuran. district Jorlang Hataran, Simalungun Regency, North Sumatra where this service aims to socialize methods of improving English literacy skills using the problem based learning method for teachers of SMP Negeri 3 Jorlang Hataran. This service has been received with good response and was appreciated by the Principal of SMP Negeri 3 Jorlang Hataran. The results obtained from this service were 76.7% of participants who stated that they were satisfied with this service. It is hoped that with this activity, there will be a good cooperation established between the University and the school to develop the quality of teachers in order to create the higher quality education.

Implementasi Software Cabri 3D terhadap Pemahaman Konsep Matematis Mahasiswa Christa Voni Roulina Sinaga; Apriani Sijabat
Journal on Education Vol 5 No 3 (2023): Journal on Education: Volume 5 Nomor 3 Tahun 2023 In Press
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v5i3.1971

The purpose of this study was to determine the implementation of Cabri 3D software on students' understanding of mathematical concepts. The type of this research is quasi-experimental research. One form of design used is the nonequivalent control group design. The instrument used in this research is an instrument to test the ability to understand mathematical concepts. The results obtained were that after implementing the Cabri application assisted learning in the experimental class, the average value of the pretest scores of student learning outcomes was an average of 75, while the pretest average value of the control class learning outcomes was 50. Posttest scores of student learning outcomes with an average -an average of 80, while the average value of the posttest control class learning outcomes is 72.5. This shows that the use of media assisted by the Cabri application in learning students' understanding of mathematical concepts is higher. Based on the average score of the student learning outcomes test, it can be seen that the experimental class is higher than the control class. This shows that the use of media assisted by the Cabri application in learning cubes and blocks has a significant effect on students' ability to understand mathematical concepts in geometric material.

Pemanfaatan Aplikasi Computer Based Test (CBT) Pada SMA swasta HKBP Hutabayuraja untuk meningkatkan efektivitas proses evaluasi Belajar Siswa Jaya Tata Hardinata; Reagan Surbakti Saragih; Dudes Manalu; Christa Voni Roulina Sinaga; Ferri Ojak Immanuel Pardede
Jurnal TUNAS Vol 4, No 1 (2022): Edisi November
Publisher : LPPM STIKOM Tunas Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30645/jtunas.v4i1.89

Utilizing Computer Based Test (CBT) application at HKBP Hutabayuraja private high school can enhance the effectiveness of the student learning evaluation process by improving accuracy and objectivity, saving time and costs, and motivating students. However, the lack of knowledge among teachers and staff about CBT remains a major obstacle in implementing this technology. Hence, socializing and training teachers and staff is crucial to maximize the benefits of this technology, while also ensuring the protection of student data from unauthorized use. The CBT application provides flexibility in terms of time and place, as it can be accessed through a computer or mobile device, allowing students to carry out learning evaluations anytime and anywhere. To optimize its usage, adequate training and socialization for teachers and staff is necessary. The use of CBT applications offers numerous benefits for both teachers and students in the learning evaluation process, highlighting the need for broader implementation of technology such as CBT applications to increase efficiency and effectiveness in evaluating student learning.

Sosialisasi Peningkatan Kemampuan Literasi Bahasa Inggris Dengan Metode Problem Based Learning Mungkap Mangapul Siahaan; Sanggam Siahaan; Rudiarman Purba; Asima Rohana Sinaga; Apriani Sijabat; Herna Febrianty Sianipar; Christa Voni Roulina Sinaga; Ropinus Sidabutar; Partohap Sihombing
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 1: Januari 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i1.1261

Improving writing skills is as supporting factor for the success of learning carried out by each teacher. Writing ability comes from the habit of reading and analyzing problems in learning that is carried out every day. The culture of writing is still far from being a habit for teachers of SMP Negeri 3 Jorlang Hataran. Therefore, the University of HKBP Nommensen Pematangsiantar University team has carried out a community service at SMP Negeri 3 Jorlang Hataran, Jalan Besar Parapat, Nagori Bah Sampuran. district Jorlang Hataran, Simalungun Regency, North Sumatra where this service aims to socialize methods of improving English literacy skills using the problem based learning method for teachers of SMP Negeri 3 Jorlang Hataran. This service has been received with good response and was appreciated by the Principal of SMP Negeri 3 Jorlang Hataran. The results obtained from this service were 76.7% of participants who stated that they were satisfied with this service. It is hoped that with this activity, there will be a good cooperation established between the University and the school to develop the quality of teachers in order to create the higher quality education.

Analysis of the Fletcher-Reeves Algorithm in Determining the Best Model for Predicting School Life Expectancy in North Sumatra Jaya Tata Hardinata; Christa Voni Roulina Sinaga; Ferri Ojak Immanuel Pardede; Juli Antasari Sinaga
JOMLAI: Journal of Machine Learning and Artificial Intelligence Vol. 2 No. 1 (2023): March
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/jomlai.v2i1.1819

Expected Length of School is the length of school (in years) that is expected to be felt by children at a certain age in the future. It is assumed that the probability that the child will remain in school at the following ages is the same as the probability of the population attending school per total population for the current age. Length of School is also a benchmark for evaluating government programs in improving Human Resources who excel in the competition of technological advances. This writing is done to implement and prove that the Fletcher-Reeves Algorithm can be used to predict Old School Expectations in North Sumatra. The research data is School Expectancy in North Sumatra which consists of 10 districts/cities, which was obtained from the Central Statistics Agency of North Sumatra from 2010 to 2020. This study uses 5 architectural models, namely 9-10-1, 9-15-1, 9-20-1, 9-25-1 and 9-30-1. From the five architectural models used, the best architectural model is 9-10-1 with an MSE of 0.0130650400. Based on this best architectural model, it will be used to predict the Expectation of Long Schools in North Sumatra for the next 5 years, from 2021 to 2025.

Pengembangan Media Pembelajaran Pengembangan Media Pembelajaran Flippbook Model Hybrid pada Pembelajaran Praktikum Kimia Dasar dalam Meningkatkan Keterampilan Proses Sains Mahasiswa: Pengembangan Media Pembelajaran Flippbook Model Hybrid pada Pembelajaran Praktikum Kimia Dasar dalam Meningkatkan Keterampilan Proses Sains Mahasiswa Eva Pratiwi Pane; Anita Debora Br Simangunsong; Christa Voni Roulina Sinaga
PendIPA Journal of Science Education Vol 7 No 2 (2023): June
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.7.2.282-288

Educators need to innovate in learning by utilizing one of the technology-based learning media using the right learning model so that the learning process becomes effective and meaningful. The purpose of this research was to develop a flipbook learning media hybrid model in basic chemistry practicum learning in improving students' science process skills. This type of research was research and development with the model proposed by Borg & Gall using the 4D model. Material and media expert validation was used to assess the feasibility of the media. The practicality and effectiveness of the media were tested in small groups. The research instrument consisted of observation sheets, practicum reports and questionnaires. The data consists of qualitative and quantitative where collected using a concurrent or concurrent model. Quantitative data was processed into percentages and interpreted to be the level of feasibility and the level of practicality of the media. Effectiveness is a media capability that is developed to support the improvement of students' science process skills. Qualitative data describes students' science process skills that were observed while students are participating in media trials. Based on the research results obtained, it can be concluded that flipbook learning media with a hybrid model in basic chemistry practicum learning that has been developed is very feasible and practical to use in basic chemistry practicum learning and can be used to train students' science process skills independently or in a supervised manner.

Motivasi dalam Pembelajaran Mate Motivasi dalam Pembelajaran Matematika Siswa di SMK Teladan Tanah Jawa: Motivasi dalam Pembelajaran Matematika Siswa di SMK Teladan Tanah Jawa Gayus Simarmata; Christa Voni Roulina Sinaga
PendIPA Journal of Science Education Vol 7 No 2 (2023): June
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.7.2.299-303

Learning mathematics in vocational high school (SMK) is not always easy. There are times when vocational high school mathematics teachers complain about learning problems. This study aims to determine learning motivation and its contribution to student learning outcomes at SMK Nusantara Tanah Jawa. The research method used was a survey method with correlational analysis, with a total sample of 79 people. The data collection techniques used were interviews, questionnaires and documentation. From the results of the research, it was obtained; that the measure of student motivation was 64.61, while the learning outcomes were 64.61 (complete). A 54.80% of students' mathematics learning outcomes were determined by their learning motivation, with the regression equation Y' = 9.86 + 0.86X. The magnitude of the contribution of learning motivation to learning outcomes does not determine the level of learning outcomes.

Demonstrasi Pengujian Fitokimia Tumbuhan Air di Kabupaten Simalungun Herna Febrianty Sianipar; Apriani Sijabat; Christa Voni Roulina Sinaga; Mardame Pangihutan Sinaga; Tambos Sianturi; Siti Imroatul Maslikah
Social Engagement: Jurnal Pengabdian Kepada Masyarakat Vol 1 No 4 (2023): September 2023
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/se.v1i4.8539

Purpose of this community service is to provides education on the benefit of aquatic plants for human health. In Simalungun, this service was provided with a socialization and questionnaire approach. Because aquatic plants include secondary metabolite chemicals that can treat diseases, the results of the counseling showed that the community did not understand the benefits of aquatic plants for human health. From the counseling, it was seen that the community has a very high level of passion and is increasingly aware of the benefits of aquatic plants for human health.

SOSIALISASI PENULISAN BUKU AJAR BAGI GURU-GURU Di SMP NEGERI 3 JORLANG HATARAN Apriani Sijabat; Christa Voni Roulina Sinaga; Herna Febrianty Sianipar; Mungkap Mangapul Siahaan; Rudiarman Purba; Asima Rohana Sinaga; Ropinus Sidabutar
KOMMAS: Jurnal Pengabdian Kepada Masyarakat Vol 4, No 2 (2023): KOMMAS: JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : KOMMAS: Jurnal Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Minimnya pengetahuan guru mengenai penulisan buku ajar merupakan permasalahan umum yang terjadi di sekolah karena guru pada umunya menggunakkan buku ajar yang diberikan oleh pemerintah. Olehkarana itu diperlukan sosialisasi penulisan buku ajar agar guru juga dapat menulis buku ajar yang dapat digunakan di sekolah. Tujuan dilaksanakannya pengabdian ini adalah agar guru- guru di SMP Negeri 3 Jorlang Hataran dapat memahami pentingnya penulisan buku ajar dan melalui pengabdian ini diharapakan guru- guru dapat menulis bbuku ajar yang baik. Metode pelaksanaan pengabdian ini menggunakan metode penyuluhan dan metode angket. Hasil pengabdian berdasarkan angket yang diisi oleh peserta pengabdian menujukkan bahwa kegiatan pengabdian ini memberikan dampak yang positif bagi peserta PKM. Berdasarkan hasil tingkat kepuasan peserta PKM maka diperoleh bahwa peserta kegiatan PKM 100 % menyatakan sangat setuju dengan kegiatan pengabdian ini. Keberhasilan pelaksanaan kegiatan ini juga ditunjukkan dalam bentuk kepuasan dari peserta yang hadir mengikuti kegiatan seminar dan pelatihan yang dilaksanakan dengan terlihat antusiasme peserta selama proses kegiatan berlangsung.

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