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All Journal Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa Konstanta : Jurnal Matematika dan Ilmu Pengelatuan Alam Interdisciplinary Explorations in Research Journal (IERJ)
Witri Wardani Hulu
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Religion Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Immunology & microbiology Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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Penyelesaian Masalah Limit Fungsi dengan Menggunakan Software MATLAB (Matrix Laboratory) Mikolis Etimanta Ginting; Eka Sri Hartini Hasibuan; Danu Rama Dani; Nia Devi Friskauly; Witri Wardani Hulu
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 2 No. 6 (2024): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v2i6.274

Abstract

The solutions of limit problems is one of fundamental concepts in real analysis, applicable in various fields of mathematics and other sciences. However, determining limit can sometimes present challenges, particularly when the fuction in question is complex and difficult to solve manually. This study demostrates the use of MATLAB as a tool to assist in solving such problems numerically. The findings show that MATLAB is realible in calculating the limits of specific fuctions, offering accurate solutions more efficiently and quickly compared to manual methods.
Evaluasi Perencanaan Produksi Kubis Di Sumatera Utara Dengan Metode Rantai Markov Waktu Diskrit Witri Wardani Hulu; Talitha Nakhwan Hasibuan; Widya Narti Lubis; Sudianto Manullang; Sisti Nadia Amalia
Konstanta : Jurnal Matematika dan Ilmu Pengetahuan Alam Vol. 2 No. 3 (2024): September : Jurnal Matematika dan Ilmu Pengetahuan Alam
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/konstanta.v2i3.3736

Abstract

This research aims to evaluate cabbage production planning in North Sumatra using the discrete-time Markov chain method. Cabbage is one of the horticultural agricultural products that plays an important role in North Sumatra's exports. Proper evaluation of production plans is necessary to ensure sustainability and increase productivity and export volume. The Discrete Time Markov Chain method is used to predict changes in cabbage production conditions over time by considering the factors that influence them. Data on cabbage production and harvested area in North Sumatra from 2020 to 2022 were analyzed using one-step and n-step transition opportunity matrices. The results of the analysis show that in 2023, cabbage production and harvested land area are predicted to experience a significant increase compared to the previous year. This research provides a more accurate and efficient planning strategy for cabbage production, which can ultimately improve agricultural management in North Sumatra.
Analisis Kruskal-Wallis Terhadap Hubungan Antara Gangguan Tidur Dengan Kualitas Tidur Witri Wardani Hulu; Yuni Sarah Siregar; Nurul Khairunnisa; Sisti Nadia Amali
Interdisciplinary Explorations in Research Journal Vol. 2 No. 3 (2024)
Publisher : PT. Sharia Journal and Education Center

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

Abstract

Sleep disorders are a global health issue that significantly impact an individual's sleep quality, encompassing physical, mental, and social aspects. This study aims to analyze the relationship between types of sleep disorders, such as insomnia and sleep apnea, and sleep quality using the Kruskal-Wallis test. This method was chosen for its ability to analyze non-normally distributed data and compare median differences across independent groups. The research data was derived from secondary datasets, and the analysis revealed significant differences in sleep quality between groups without sleep disorders and those with insomnia. However, no significant differences were found between the insomnia and sleep apnea groups. A post-hoc analysis with Bonferroni correction supported these findings, indicating that insomnia has a more detrimental impact on sleep quality than sleep apnea. This study provides new insights into the effects of sleep disorders on sleep quality and serves as a foundation for developing interventions to improve sleep quality in individuals with sleep disorders.
Co-Authors Danu Rama Dani Eka Sri Hartini Hasibuan Manullang, Sudianto Mikolis Etimanta Ginting Nia Devi Friskauly Nurul Khairunnisa Sisti Nadia Amali Sisti Nadia Amalia Talitha Nakhwan Hasibuan Widya Narti Lubis Yuni Sarah Siregar