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All Journal Aquacoastmarine CONSISTAN : Jurnal Tadris Matematika
Rina Sari Lubis
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Mathematics Other

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Potensi, Tingkat Pemanfaatan dan Keberlanjutan Ikan Tembang (Sardinella spp.) di Perairan Selat Malaka, Kabupaten Serdang Bedagai, Sumatera Utara Rina Sari Lubis; Miswar Budi Mulya; Desrita Desrita
AQUACOASTMARINE Vol 1, No 1 (2013): JURNAL AQUACOASTMARINE VOLUME 1, NO 1, DESEMBER 2013
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (452.256 KB)

Abstract

Tembang fish (Sardinella spp.) is a small pelagic fish, which live inschooling. This fish can be caught using drift gill net gear, purse seine, handlinesand payang. The purpose of this study was to determine the potential ofsustainability with optimum fishing effort, utilization rates and insistence,sustainability and management of fish resources in Malacca Strait. The analysisof secondary data from 2008 to 2012 obtained from the Department of Marineand Fisheries Serdang Bedagai regency, and primary data obtained by performeda questionnaire related to the sustainability of tembang fish.The potential prediction performed with Fox model. The result shown thatMSY was 5.930,582 tons/year and optimum effort was 22.466 trips/year. Averageutilization rate of 44,95%, with an average rate of 77,26% insistence, whileallowable catch 4.744,465 tons/year. The sustainability of tembang fish,dimensional the ecological, technologies and institutions into unsustainablecategory. While economic and social dimensions included the category ofsustainable. The management efforts was by setting fishing season, the selectivityof fishing gear, prohibition of fishing gear and quota restrictions arrest.Keywords: Malacca Strait, Potential, Utilization, Sustainability, Sardinella spp.
Analisis Butir Soal pada Olimpiade Matematika Tingkat Mahasiswa di STAIN Mandailing Natal Alghar, Muhammad Zia; Lubis, Rina Sari; Aslamiah; Lubis, Nisa Cahya Pertiwi
CONSISTAN (Jurnal Tadris Matematika) Vol 3 No 02 (2025): Consistan : Jurnal Tadris Matematika
Publisher : Program Studi Tadris Matematika Fakultas Tarbiyah Institut Agama Islam Al-Qolam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35897/consistan.v3i02.2238

Abstract

This study aims to determine the quality of questions in the Mathematics Olympiad in the 2025 Geometric Competition at STAIN Mandailing Natal. The focus of the study was on ten multiple-choice questions used in the competition. This study used a quantitative approach with descriptive analysis. The research data came from the answer sheets of 64 participants who were students participating in the competition. The data were analyzed using classical statistics, including validity, reliability, difficulty level, discriminating power, and distractor effectiveness tests. The results of the analysis showed that 60% of the questions were in the valid category. The reliability test results showed that the questions had not reached the threshold set for the reliable category. The difficulty level results showed that 100% of the questions were in the difficult category, requiring high ability from participants. The discriminating power results showed that many questions were in the weak and moderate categories. Meanwhile, the distractor analysis results showed that 87.5% of the distractors functioned well. This study shows that the quality of the questions in the 2025 Geometric Competition still needs improvement. The questions need to be reviewed in order to assess the mathematical abilities of the participants more accurately.
Co-Authors Alghar, Muhammad Zia Aslamiah Desrita Desrita Lubis, Nisa Cahya Pertiwi Miswar Budi Mulya