Explicit alternating direction methods for problems in fluid dynamics

Recently an iterative method was formulated employing a new splitting strategy for the solution of tridiagonal systems of difference equations. The method was successful in solving the systems of equations arising from one dimensional initial boundary value problems, and a theoretical analysis for proving the convergence of the method for systems whose constituent matrices are positive definite was presented by Evans and Sahimi [22]. The method was known as the Alternating Group Explicit (AGE) method and is referred to as AGE-1D. The explicit nature of the method meant that its implementation on parallel machines can be very promising. The method was also extended to solve systems arising from two and three dimensional initial-boundary value problems, but the AGE-2D and AGE-3D algorithms proved to be too demanding in computational cost which largely reduces the advantages of its parallel nature. In this thesis, further theoretical analyses and experimental studies are pursued to establish the convergence and suitability of the AGE-1D method to a wider class of systems arising from univariate and multivariate differential equations with symmetric and non symmetric difference operators. Also the possibility of a Chebyshev acceleration of the AGE-1D algorithm is considered. For two and three dimensional problems it is proposed to couple the use of the AGE-1D algorithm with an ADI scheme or an ADI iterative method in what is called the Explicit Alternating Direction (EAD) method. It is then shown through experimental results that the EAD method retains the parallel features of the AGE method and moreover leads to savings of up to 83 % in the computational cost for solving some of the model problems. The thesis also includes applications of the AGE-1D algorithm and the EAD method to solve some problems of fluid dynamics such as the linearized Shallow Water equations, and the Navier Stokes' equations for the flow in an idealized one dimensional Planetary Boundary Layer. The thesis terminates with conclusions and suggestions for further work together with a comprehensive bibliography and an appendix containing some selected programs

STUDI PEMANFAATAN APLIKASI TIK-TOK SEBAGAI ALTERNATIF MEDIA PEMBELAJARAN BAHASA ARAB PADA MASA PANDEMI COVID 19

Dewasa ini inovasi pembelajaran media berbasis online semakin meningkat. Dunia pendidikan telah mengalami pergeseran tradisi dari pembelajaran offline (berbasis tatap muka) menjadi online (berbasis teknologi), hal ini diakibatkan oleh pandemi covid 19. Tentunya hal ini menuntut pendidik untuk memanfaatkan berbagai media teknologi, salah satunya dengan menggunakan aplikasi tik-tok dalam pembelajaran Bahasa Arab. Sebagaimana diketahui tik-tok adalah aplikasi yang cukup populer dikalangan khalayak ramai. Total unduhan aplikasi tik-tok pada tahun 2020 mencapai 36,6 juta kali dan indonesia menjadi negara yang paling banyak mengunduh aplikasi ini, yaitu sebesar 11% dari total unduhan aplikasi tersebut. Tujuan dari penelitian ini adalah untuk mengetahui keefektifan tik-tok jika digunakan untuk media pembelajaran Bahasa Arab. Penelitian ini menggunakan metode kualitatif dengan pendekatan deskriptif. Adapun teknik pengumpulan datanya berupa kajian kepustakaan (library research) yaitu mengkaji berbagai permasalahan dari berbagai sumber pustaka yang selaras dan sesuai serta menggali informasi dan data-data yang akan penulis tuangkan dalam bentuk pembahasan sampai mendapatkan kesimpulan akhir. Hasil dari penelitian ini menunjukkan bahwasanya tik-tok merupakan aplikasi yang efektif dan bermanfaat untuk digunakan sebagai alternatif media pembelajaran Bahasa Arab. Hal ini dikarenakan tik-tok memiliki banyak pengguna, memiliki banyak fitur yang mendukung kegiatan pembelajaran serta disenangi semua kalangan terkhusus kaum milenial usia pelajar, dan terjamin keamanannya karena memiliki fitur yang mengatur pengoptimalan penyebaran konten sebagai wadah filterisasi.Kata Kunci: Tik-Tok, Media Pembelajaran, Bahasa Arab, Pandemi, dan Covid-1

IMPLEMENTASI PERATURAN DAERAH NOMOR 9 TAHUN 2018 TENTANG PERLINDUNGAN ANAK DI TEMBILAHAN KOTA KABUPATEN INDRAGIRI HILIR DITINJAU DARI FIQIH SIYASAH

ABSTRAK AL WALI (2022): Implementasi Peraturan Daerah Nomor 9 Tahun 2018 Tentang Perlindungan Anak ditembilahan kota Kabupaten Indragiri Hilir Ditinjau Dari Fiqih Siyasah Perlindungan anak merupakan segala usaha yang dilakukan untuk mencipkan kondisi setiap anak dapat melaksanakan hak dan kewajibannya demi pertumbuhan anak secara wajar, baik fisik, mental, dan sosial. Peran melindungi seorang anak bukan hanya terpaku pada orang tua, namun masyarakat dan pemerintah juga memiliki peran untuk melindungi, menjaga, dan memenuhi hak-hak anak. Sebagaimana salah satu upaya pemerintah untuk melindungi anak dengan membentuk Peraturan Daerah Nomor 9 Tahun 2018 Tentang Perlindungan Anak Penelitian ini dilakukan dengan tujuan mengetahui. 1) Bagaimana Implementasi Peraturan Daerah Indragiri Hilir Nomor 9 Tahun 2018 Tentang Perlindungan Anak di Tembilahan kota. 2) Apa faktor penghambat Implementasi Peraturan Daerah Kabupaten Indragiri Hilir Nomor 9 Tahun 2018 Tentang Perlindungan Anak di Tembilahan kota. 3) Bagaimana Pandangan fiqh siyasah mengenai Implementasi Peraturan Daerah Indragiri Hilir Nomor 9 Tahun 2018 tentang Perlindungan Anak Dalam skripsi ini penulis menggunakan metode lapangan (field research) penelitian ini dilakukan dengan mengambil data dari Dinas Pengendalian Penduduk Keluarga Berencana dan Pemberdayaan Perempuan dan Pelindungan Anak Kabupaten Indragiri Hilir. Teknik pengumpulan data yang digunakan dalam skripsi ini adalah wawancara dan dokumentasi. Sedangkan dalam Teknik analisis data penulis menggunakan metode analisis kualitatif yakni proses mencari dan menyusun secara sistematis data yang diperoleh dari hasil wawancara, catatan lapangan, dan dokumentasi agar mudah dipahami baik dirisendiri maupun orang lain. Dari hasil pembahasan dapat kita simpulkan bahwasannya Peraturan Daerah Kabupaten Indragiri Hilir Nomor 9 Tahun 2018 Tentang Perlindungan Anak di Tembilahan Kota dalam mengatasi kekerasan anak yang terjadi di Tembilahan Kota Kabupaten Indragiri Hilir telah terlaksana dengan cukup baik akan tetapi masih memiliki hambatan dari sumber anggaran yang terbatas dan hambatan dari masyarakat itu sendiri yang menjadi sedikit kendala dalam menerapkan perlindungan anak di Tembilahan Kota. Kata kunci: Implemetasi, Perlindungan anak, Fiqih siyasa

STUDENTS' RESISTANCE TO TENGKU DAYAH'S AUTHORITY

This paper discusses the resistance of students against authority of Tengku Dayah in Aceh. The scholarship on Dayah education in contemporary Aceh shows the resistance of santri (students) to the regulations that apply in the Dayah. But so far, studies that address the theme of resistance have not received adequate attention. Based on qualitative data collected through in-depth interviews, observation, and documentation studies, using Michel Foucault's theory. This article argues that the resistance carried out by the santri in the Dayah occurred because of their discourse on the rules and regulations that had been set, and the authorities of the Tengku occurred because of two dominating things, science, and epistemology. In line with that, this article emphasizes that the resistance of santri to the authorities of the Tengku includes various forms, namely: often being late during ablution, students sleeping during tahajjud, buying iftar outside the Dayah complex and eating during breaks, not attending privately for reasons sick, leaving the complex by climbing the fence, not wearing a white robe during Friday prayer

Tengku Inong dari Dayah Salafiah Aceh: Kearifan Lokal dalam Penguatan Pendidikan Karakter

Penelitian tentang Tengku Inong dan pendidikan karakter telah banyak dilakukan, namun mengaitkan dengan strategi kearifan lokal belum ditemukan. Penelitian ini bertujuan untuk menganalisis strategi kearifan lokal Tengku Inong dalam mensukseskan program penguatan pendidikan karakter (PPK). Artikel ini merupakan penelitian kualitatif dengan pendekatan etnopedagogi pada tiga dayah salafiah (Darul Huda, RAMA, Bustanul Huda). Sumber data melalui wawancara 5 Tengku Inong dan 10 santriwati, observasi serta dokumentasi. Analisa data dilakukan secara kualitatif melalui tiga tahapan: reduksi data, display data, pengambilan kesimpulan/verifikasi menggunakan teori hegemoni Antanio Gramsci. Hasil penelitian menunjukkan ada tiga strategi Tengku Inong mendidik karakter: Pertama, melalui hareh/asisten tengku sebagai pengontrol yang menguatkan nilai religius; kedua, melalui beut seumeubet untuk menguatkan nilai integritas dan mandiri; ketiga dengan keuramat untuk menguatkan nilai gotong royong. Tengku Inong telah mensukseskan program PPK menggunakan stategi kearifan lokal. Pendidik perlu membangun konsep pendidikan karakter berbasis kearifan lokal seiring tingginya dekadensi moral dan melunturnya nilai lokalita

Conceptual Evolution and Fundamental Challenges in Transition from Cold War Security Discourse and Emergence of Human Security Discourse in the Age of Globalization

It is widely accepted that human security is one of the latest, most critical topics in the political science literature and international relations. This concept proposes that the origin or goal of security provision must be human beings. In fact, human security has the concept of 'the human' embedded at the heart of it.With a more extensive interpretation, human security has extended the scope of security and has assessed social and economic issues within this framework. Understanding human security requires the comprehension of its conceptual evolution process. As such, the main issue covered in the current study was understanding the nature of conceptual evolutions of human security in two periods before and after the Cold War. To realize this issue, we evaluated some of the most important international efforts and documents related to the concept and derived the significant factors and subcategories in two periods. Despite following the evolutionary process of human security and becoming one of the most important security discourses, this concept still deals with serious challenges in conceptual and functional areas. Therefore, the second and main question of the present study was: what is the nature of key challenges of human security discourse at national and international levels? To answer this question, we used the exploratory approach and a descriptive-analytical method to explain the most important challenges facing human security in conceptual and functional dimensions

Severe Neonatal Presentation of Progressive Familial Intrahepatic Cholestasis Type 4 in an Omani Infant

Progressive familial intrahepatic cholestasis type 4 (PFIC4) is a relatively newly described autosomal recessive disorder caused by biallelic mutations in the gene encoding tight junction protein 2 (TJP2) which is located in chromosome 9q21. PFIC4 is characterized by cholestasis with or without other extrahepatic manifestations. Bleeding tendency due to vitamin k deficiency is a well-known complication of cholestasis. We present a neonate who presented with cholestasis and multiple intracranial bleeds. He was found to have severe coagulopathy and his genetic work up revealed a homozygous variant mutation in TJP2 gene causing PFIC4. He had persistent cholestasis that necessitated an internal biliary diversion with some clinical improvement. Keywords: Jaundice; Intracranial haemorrhage; Progressive Familial Intrahepatic Cholestasis type 4

Probing quantum correlations in a hybrid optomechanical system

Refining coherence is a central challenge in quantum simulations and experiments on optomechanical cavities. Here we suggest a scheme of two coupled optomechanical cavities to enhance the intracavity entanglement. The couplings are established between the optical modes through a photon hopping process and between the mechanical resonators by the phonon tunneling process. Both cavities are driven by classical light. The generated quantum correlations inside each cavity are explored in terms of strength couplings with two different quantum measures, namely, logarithmic negativity and quantum steering. These will allow us to analyze the various aspects of these quantum measures and see the interest in their applications. Also, the stability conditions are examined in terms of the coupling strengths. Consequently, it is shown that the intracavity-entanglement degree can be quantified, and it is found that the generated entanglement can be improved with an appropriate choice of the photon and phonon hopping strengths. The calculations were performed within the recent experimentally accessible parameters.Comment: 10 pages, 5 figure