UIN (Universitas Islam Negeri) Walisongo Journals
Not a member yet
5477 research outputs found
Sort by
Penentuan Portofolio Saham Optimal Menggunakan Metode Markowitz Sebagai Dasar Keputusan Investasi
Get PDFA stock portfolio is a combination of two or more securities invested over a specific period and under certain conditions. This study analyzes the combination of stocks that can be formed into an optimal portfolio using the Markowitz method. The Markowitz method is employed to maximize returns and minimize the risks associated with a portfolio. This method uses a mathematical formulation that allows for adjustments based on risk tolerance levels and expected returns to achieve an optimal portfolio. The data used in this study comprises the monthly closing prices of stocks from five selected companies, namely ICBP, BBCA, TLKM, BBNI, and INCO, for the period from June 2019 to December 2022. The findings indicate a recommended portfolio with the lowest risk, known as the Minimum Variance Portfolio (MVP). The MVP comprises the following proportions: ICBP 36.10%, BBCA 36.28%, TLKM 17.84%, INCO 8.39%, and BBNI 1.39%. This combination of stock proportions yields an expected return of 8.58% and a portfolio risk of 21.52%.Keywords: Markowitz method, Minimum Variance Portfolio, Portfolio Optimization
Optimasi Rute Pendistribusian Barang Menggunakan Kombinasi Algoritma Branch and Bound dan Cheapest Insertion Heuristic
Get PDFThe problem that often occurs in the process of distributing goods is that the distribution route is not optimal which results in higher costs and longer travel times. This can be solved by finding the shortest path that can be passed or widely recognized as the Traveling Salesman Problem (TSP). This study aims to determine the optimal distribution route for goods using a combination of the Branch and Bound and Cheapest Insertion Heuristic algorithms. The data used are in the form of location names and distances between locations that have been collected by Putra BJ Bangun in his research entitled Solving the Traveling Salesman Problem (TSP) with the Branch and Bound Method (Application of the Palembang Post Office Goods Transportation Problem). The results of the research indicate that the optimal route for the distribution of goods at the Palembang City Post Office, using a combination of both algorithms, is: KPRK Palembang → KPC Kapt A. Rivai → KPC Pakjo → KPC Talang Ratu → KPC Sukarami → KPC Alang Lebar → KPC Sekip → KPC Cinde → KPRK Palembang, spanning a total of 24.3 km. This route can be an alternative for salesmen to visit several KPCs and return to KPRK, with more efficient costs and time because it is the shortest route. In addition, this combination of algorithms is more efficient and simpler in terms of processing steps and computing time compared to using the Branch and Bound algorithm.Keywords: Traveling Salesman Problem (TSP), Branch and Bound, Cheapest Insertion Heuristic, Algorithm Combination, Optimal
Proses Penalaran Matematis Siswa SMP dalam Statistika
Get PDFMathematical reasoning is very important for students to master. This research aims to reveal students' mathematical reasoning processes in solving statistical problems. This research used a descriptive qualitative method involving 25 students from class VII-D of SMP Negeri 16 Semarang. The research instrument consists of mathematical problems related to statistics. Data collection was carried out through written tests and interviews. Data were analyzed by data reduction, data presentation, and drawing conclusions. The research results showed that 16% of students had high mathematical reasoning abilities, 72% of students had moderate mathematical reasoning abilities, and 12% of students had low mathematical reasoning abilities. Based on the results of interviews, the mathematical reasoning process of lower group students is hampered by the process of presenting mathematical statements verbally, drawings, sketches or diagrams; make allegations; checking the validity of an argument; and students' lack of understanding of mathematical concepts. The implications of the findings in this research can be used as a reference for developing appropriate learning strategies to overcome students' difficulties in the mathematical reasoning process.
Keywords: reasoning process, mathematics, statistics
THE HISTORY OF DETERMINING TIME AT NIGHT USING NOCTURLAB INSTRUMENTS
Get PDFAt night, determining time is a little more complicated because the Sun cannot be observed directly. However, there is a unique instrument for knowing the time at night by reference to the position of the stars in the sky, namely the nocturlab. This article will discuss the history of determining the time at night with nocturlab. The method used in this research is qualitative to get an overview of Nocturlab in the past. This research shows that the Nocturlab instrument has a long development history; even though it is now a more sophisticated tool for determining time, this tool remains an essential part of astronomy and determining time in human civilization
ANALYSIS OF TIME-ZONE RELATIONSHIP TO EPHEMERIS DATA RETRIEVAL IN CALCULATING THE BEGINNING OF JEMBRANA-BANYUWANGI PRAYER TIMES
Get PDFThe calculation of prayer times in Bali and Banyuwangi Regency often needs to be clarified. Hasib suggests Bali's prayer time calculations could refer to those in Banyuwangi due to their close astronomical coordinates. While Bali uses the Central Indonesian Time Zone (WITA, GMT+8), Banyuwangi adopts the Western Indonesian Time Zone (WIB, GMT+7). This discrepancy arises despite the proximity of their locations, reflecting government decisions based on international considerations, especially after Bali was reassigned from WIB to WITA through Presidential Decree No. 41 of 1987. This library research uses qualitative methods such as documentation and descriptive analysis. It shows that the differences in prayer time calculations between Bali and Banyuwangi are minimal, often just a matter of seconds, mainly if there is an error in inputting Ephemeris data. However, such errors have no significant impact as long as the date remains consistent and time zone corrections adhere to official regulations
PROPHET IDRĪS AS THE INVENTOR OF ISLAMIC ASTRONOMY FROM THE BIBLE AND AL-QUR’AN PERSPECTIVES
Get PDFAstronomy is the oldest science discovered. Therefore, the discussion of who the first inventor of astronomy was is interesting to explore. Some literature states that the Prophet Idrīs was the first person to know astronomy. However, there is also an opinion that the Prophet Unusy had known astronomy long before the Prophet Idrīs was born. To discover who invented astronomy, we need to trace who the Prophet Idrīs was when viewed from the perspective of the Bible (Old Testament and New Testament) and the Qur'an. Through a historical approach and analytical descriptive method, this article explains the results of a study related to the biography of the Prophet Idrīs and his genealogy according to the Bible and the Qur'an, as well as several opinions of astronomy experts who confirm the Prophet Idrīs as the inventor of astronomy
Strategies for Integrating Multicultural Education and Religious Education to Strengthen the Multicultural Character of Elementary School Students
Get PDFReligious education and multicultural education in elementary schools are considered very important in addressing the increasing issue of moral decay among children. This study aims to describe the strategy of integrating the interconnection of religious and multicultural education in strengthening the character of elementary school students. This study uses a qualitative approach of the case study type with the objects of the principal, teachers, and students. Research data were collected through observation, interviews, and documentation. The collected data were then analyzed through data reduction, data presentation, and conclusion drawing. Researchers use triangulation techniques and triangulation sources to obtain data validity. This study found that integrating the interconnection of religious education and multicultural education strengthens the character of elementary school students by integrating-interconnecting certain values in the curriculum and the learning process, namely equality, unity, justice, kinship, tolerance, and love of peace. The results of this study not only provide theoretical contributions to character formation through religious and multicultural education and offer practical insights for elementary schools in forming students' characters through the integration of religious and multicultural education
Urgensi Perencanaan Pendidikan Islam di Era Disrupsi
No full textDi era disrupsi saat ini, transformasi yang cepat dan tidak terduga telah menjadi norma baru dalam berbagai aspek kehidupan, termasuk dalam dunia pendidikan. Disrupsi ini, yang didorong oleh kemajuan teknologi, globalisasi, dan perubahan sosial-politik, telah mempengaruhi struktur, metode, dan tujuan pendidikan secara fundamental. Pendidikan, sebagai salah satu pilar utama dalam pembentukan karakter dan mentalitas individu, menghadapi tantangan yang semakin kompleks. Di tengah arus informasi yang begitu deras dan mudahnya akses terhadap berbagai konten, ada risiko meningkatnya pengaruh negatif yang dapat merusak nilai-nilai moral dan spiritual generasi muda. Fenomena seperti penyebaran konten yang tidak etis, disinformasi, serta polarisasi ideologi menjadi ancaman nyata yang dapat menghambat proses pendidikan yang holistik. Dalam konteks ini, pendidikan Islam, dengan ajarannya yang kaya tentang moralitas, etika, dan spiritualitas, menawarkan paradigma yang relevan dan berkelanjutan untuk menghadapi tantangan disrupsi. Namun, untuk mengoptimalkan kontribusi pendidikan Islam dalam membentuk karakter generasi muda yang tangguh dan berintegritas, diperlukan perencanaan pendidikan yang komprehensif, adaptif, dan inovatif. Oleh karena itu, urgensi perencanaan pendidikan Islam di era disrupsi bukanlah sekedar kebutuhan, tetapi merupakan keharusan. Perencanaan yang tepat akan memastikan bahwa pendidikan Islam tetap relevan, efektif, dan berdaya saing dalam menghadapi dinamika zaman yang penuh tantangan
Peran Orangtua dalam Pengenalan Sex Education Anak Usia Dini
No full textBelakangan ini, jumlah kasus pelecehan seksual semakin meningkat, terutama terhadap anak-anak. Hal ini merupakan ancaman serius bagi bangsa karena dapat merusak fisik, mental, pola pikir, dan kesehatan mental anak. Penelitian ini menggunakan berbagai sumber, yaitu buku, jurnal dan penelitian terdahulu. Peran orang tua sangat penting dalam pendidikan seks anak. Setiap orang tua mempunyai tanggung jawab, antara lain: 1) melahirkan, 2) mengasuh, 3) mengasuh anak, 4) orientasi menuju kedewasaan, dan 5) menanamkan norma dan nilai dalam masyarakat. Selain itu, orang tua juga harus mampu mengembangkan potensi anak, memberikan teladan dan mengembangkan pendidikan seks pada anak usia dini yang sangat penting serta peran orang tua dalam memberikannya tidak bisa diabaikan. Orang tua harus menyadari tanggung jawabnya dalam membimbing anak dengan benar dan memberikan informasi yang benar tentang seksualitas, sehingga anak dapat tumbuh menjadi individu yang sehat jasmani, rohani dan emosi
Pengaruh Penerapan Buku Cerita Digital dalam Meningkatkan Kemampuan Berbahasa Anak Usia Dini
Get PDFPenelitian ini didasarkan atas sebuah permasalahan keterampilan berbahasa anak usia dini. Penelitian ini menyoroti penggunaan buku cerita digital sebagai metode pembelajaran untuk meningkatkan keterampilan berbahasa anak usia dini. Penelitian ini bertujuan untuk mengevaluasi efektivitas buku cerita digital dalam meningkatkan keterampilan berbahasa anak usia dini, termasuk pemahaman kosakata, kemampuan berbicara, dan keterampilan mendengarkan. Selain itu, penelitian ini juga bertujuan untuk mengeksplorasi sejauh mana teknologi digital dapat memfasilitasi proses pembelajaran dan meningkatkan minat serta keterlibatan anak-anak dalam belajar berbahasa. Penelitian ini dilakukan di TK Nahdlatus Subban dengan mengamati respons anak-anak terhadap sesi dongeng yang dipimpin oleh peneliti. Metode penelitian menggunakan menggunakan teknik analisis data berupa uji wilcoxon match pairs test. Sampel berjumlah 15 anak dengan rentang usia 4-5 tahun di TK Nahdlatus Subban. Hasil penelitian menunjukkan kemampuan berbahasa anak berkembang secara signifikan berdasarkan hasil uji wilcoxon Thitung < Ttabel (0 < 1,75). Berdasarkan pada perhitungan tersebut, maka dapat disimpulkan bahwa H1 diterima sedangkan H0 ditolak. Sehingga, buku cerita digital mempunyai pengaruh dalam kemampuan bahasa anak usia 4-5 tahun di TK Nadhlatus Subban