Judul: Efektivitas Pengelolaan Zakat di BAZNAS Kota Bogor dengan Pendekatan Indeks Implementasi ZCP
Abstrak: Kemiskinan merupakan permasalahan yang dihadapi oleh pemerintah Indonesia. Permasalahan tersebut dapat diatasi dengan melakukan redistribusi. Salah satu instrumen penting dalam sistem redistribusi yaitu zakat. BAZNAS Kota Bogor menjadi lembaga amil yang menangani pengelolaan zakat di Kota Bogor. Dengan penduduk muslim yang mencapai 969.343 jiwa, secara implisit bahwa Kota Bogor memiliki potensi zakat yang besar. Namun, pengelolaan zakat belum berjalan dengan optimal karena masih besarnya gap antara potensi dan realisasinya. Penelitian ini bertujuan untuk menghitung nilai indeks implementasi ZCP di BAZNAS Kota Bogor dan untuk menganalisis perolehan nilai indeks dimensi yang tertinggi dan terendah guna meningkatkan performa pengelolaan zakat. Penelitian ini diambil dengan metode studi kasus (case study), melalui wawancara terstruktur satu per satu narasumber dengan menggunakan kuesioner dan in-dept interview. Alat analisis yang digunakan pada penelitian ini adalah Indeks Implementasi ZCP dengan metode penghitungan yang dinamakan Multi-Stage Weighted Index. Hasil penelitian menunjukkan bahwa pengelolaan zakat di BAZNAS Kota Bogor sudah sangat baik dengan nilai Indeks Implementasi ZCP sebesar 0.82 yang berarti BAZNAS Kota Bogor menjadi model percontohan organisasi yang telah mengimplementasikan indikator ZCP., The Indonesian government is frequently confronted with poverty. Redistribution is a way to solve these challenges. Zakat is a key tool in the system of redistribution. Bogor City BAZNAS is a Muslim-run organization that manages zakat in Bogor. Bogor City has a big zakat potential due to its Muslim population of 969,343 individuals. The management of zakat, on the other hand, has not ran smoothly because there is still a significant gap between its promise and its actualization. The goal of this research is to calculate the ZCP implementation index value at BAZNAS Bogor City and assess the acquisition of the highest and lowest dimensional index values in order to improve zakat management performance. This study was conducted utilizing a case study method, which included one-on-one structured interviews with respondents using questionnaires and in-depth interviews. The ZCP Implementation Index was employed in this study, with the Multi-Stage Weighted Index as the computation technique. The results showed that the management of zakat in BAZNAS Bogor City was very good with a ZCP Implementation Index value of 0.82, which means that BAZNAS Bogor City has become a pilot model for organizations that have implemented ZCP indicators.
Keyword: Effectiveness, ZCP Implementation Index, Zakat Management, Zakat Core Principles

Judul: Analisis Efisiensi dan Efektivitas Pengelolaan Zakat di BAZNAS Kabupaten Karanganyar dengan Pendekatan Indeks Implementasi ZCP
Abstrak: Masalah kemiskinan dan disparitas distribusi pendapatan yang masih dihadapi oleh pemerintah Indonesia dapat diatasi dengan melakukan sistem redistribusi yaitu zakat. BAZNAS Kabupaten Karanganyar menjadi lembaga amil yang menangani pengelolaan zakat di Kabupaten Karanganyar. Dengan total penduduk Muslim pada tahun 2021 mencapai 897.564 jiwa, secara implisit Kabupaten Karanganyar memiliki potensi zakat yang besar. Namun, pengelolaan zakat belum optimal dikarenakan masih besarnya gap antara potensi dan realisasinya. Penelitian ini bertujuan untuk mengetahui efisiensi dan efektivitas pengelolaan zakat di BAZNAS Kabupaten Karanganyar dengan menggunakan indeks implementasi ZCP serta menganalisis perolehan nilai indeks dimensi yang tertinggi dan terendah guna meningkatkan performa pengelolaan zakat. Penelitian ini dilakukan dengan menggunakan data primer dan data sekunder. Data primer diambil melalui wawancara terstruktur dengan menggunakan kuesioner. Alat analisis yang digunakan adalah Data Envelopment Analysis (DEA) serta menggunakan pendekatan Indeks Implementasi ZCP. Hasil dari penelitian ini menunjukkan bahwa terjadi inefisiensi pengelolaan zakat di BAZNAS Kabupaten Karanganyar dengan skor perolehan 90,3% dan hasil dari perhitungan nilai indeks implementasi ZCP sebesar 0,75 yang menunjukkan bahwa pengelolaan zakat di BAZNAS Kabupaten Karanganyar berada dalam kategori baik., The problem of poverty and income distribution disparities that are still faced by the Indonesian government can be overcome by implementing a redistribution system, namely zakat. BAZNAS Karanganyar Regency is an amil institution that handles zakat management in Karanganyar Regency. With a total Muslim population in 2021 reaching 897,564 people, Karanganyar Regency implicitly has a large zakat potential. However, the management of zakat has not been optimal due to the large gap between its potential and its realization. This study aims to determine the efficiency and effectiveness of zakat management in BAZNAS Karanganyar Regency using the ZCP implementation index and analyze the acquisition of the highest and lowest dimension index values in order to improve zakat management performance. This research was conducted using primary data and secondary data. Primary data were taken through structured interviews using a questionnaire. The analytical tool used is Data Envelopment Analysis (DEA) and uses the ZCP Implementation Index approach. The results of this study indicate that there is inefficiency in zakat management in BAZNAS Karanganyar Regency with a score of 90.3% and the results of the calculation of the ZCP implementation index value of 0.75 which indicates that zakat management at BAZNAS Karanganyar Regency is in the good category.
Keyword: Data Envelopment Analysis, Effectiveness, Efficiency, ZCP Implementation Index, Zakat Management

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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