Judul: Analisis Faktor-Faktor yang Memengaruhi Muzaki dalam Memilih Organisasi Pengelola Zakat (OPZ) : Studi Kasus di Badan Amil Zakat Nasional Kota Bogor
Abstrak: The main purpose of management of zakat in Act No 23/2011 is to achieve public welfare and poverty alleviation. However, until now, zakat has not been sufficient to attain both these goals since zakat fund collected in Indonesia is only about 1% of its national potential that reaches Rp 217 trillion. This indicates that there are many muslims who are not motivated to pay zakat nor trust Zakat Management Organization. This study analyzes the factors that influence muzakki in choosing Zakat Management Organization and the performance of BAZNAS Kota Bogor from muzakki’s perception. Logistic regression is used to analyze the factors that affect muzakki in choosing the Zakat Management Organization. Descriptive analysis is used to analyze the perceptions of the BAZNAS Kota Bogor. This research was conducted during the month of February 2014 with 30 respondents BAZNAS Kota Bogor’s muzakki and 30 respondents muzakki whose paying zakat directly to mustahiq. The results of logistic regression show that the factors that affect muzakki in choosing Zakat Management Organization are income, the level of reliability, and institution’s image. The muzakki’s perception of the performance of BAZNAS Kota Bogor can be concluded as good, particulary in reliability, responsiveness, and tangible.
Keyword: Logistic Regression Method, Zakat Management Organization (OPZ), Zakat,

Judul: Faktor-faktor yang Memengaruhi Preferensi Muzaki dalam Memilih Tempat Penyaluran Zakat Mal di Bogor.
Abstrak: Zakat merupakan ibadah yang memiliki dampak langsung terhadap pengembangan sosial ekonomi masyarakat. Kota dan Kabupaten Bogor memiliki potensi zakat mencapai Rp 120 miliar per tahun, namun zakat yang terhimpun per tahun 2023 hanya sebesar Rp 6,6 miliar. Salah satu faktor penyebabnya adalah kecenderungan muzaki menyalurkan zakatnya secara langsung kepada mustahik tanpa perantara badan atau lembaga pengelola zakat. Penelitian ini bertujuan untuk menganalisis karakteristik muzaki dan faktor-faktor yang memengaruhi preferensi dalam menyalurkan zakat mal di Kota dan Kabupaten Bogor. Responden dalam penelitian ini berjumlah 100 orang, terdiri dari 50 orang yang menyalurkan ke lembaga dan 50 orang menyalurkan langsung ke mustahik. Metode yang digunakan adalah analisis deskriptif dan analisis regresi logistik. Hasil analisis regresi logistik menunjukkan bahwa variabel kepercayaan, kepuasan diri, citra lembaga, aksesibilitas, dan pendapatan berpeluang besar untuk meningkatkan minat muzaki untuk menyalurkan zakat ke lembaga pengelola zakat., Zakat is a form of worship that has a direct impact on the socio-economic development of the community. Bogor City and Regency has zakat potential reaching Rp 120 billion per year, but the zakat collected per year 2023 only amounted to Rp 6.6 billion. One of the factors causing this is the tendency of muzaki to channel their zakat directly to mustahik without intermediary agencies or zakat management institutions. This study aims to analyze the characteristics of muzaki and the factors that influence preferences in distributing mal zakat in Bogor City and Regency. Respondents in this study amounted to 100 people, consisting of 50 people who channeled to institutions and 50 people channeled directly to mustahik. The method used is descriptive analysis and logistic regression analysis. The result of logistic regression analysis shows that the variables of trust, self-satisfaction, institutional image, accessibility, and income are likely to increase the interest of muzaki to channel zakat to zakat management institutions.
Keyword: Preferences, Zakat Management Organizations, Zakat Potential, Wealth-Based Zakat

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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