Judul: Analisis Faktor-Faktor yang Memengaruhi Minat Masyarakat Memiliki Asuransi Kesehatan di Masa Pandemi Covid-19
Abstrak: Asuransi kesehatan merupakan instrumen penting untuk mengalihkan risiko kerugian akibat sakit. Munculnya pandemi menyebabkan peningkatan risiko kesehatan. Penelitian ini bertujuan untuk mengidentifikasi faktor-faktor yang membangun minat seseorang memiliki asuransi kesehatan khususnya pada saat atau setelah pandemi. Model dalam penelitian ini merupakan pengembangan Theory of Planned Behaviour yang terdiri dari attitude towards behaviour, subjective norms, dan perceived behavioural control, dengan menambahkan faktor kesehatan, ekonomi, dan Covid-19 untuk meneliti minat memiliki asuransi kesehatan. Penelitian melibatkan 207 responden dengan kriteria berusia di atas 21 tahun atau lebih dan memiliki penghasilan. Penelitian menggunakan teknik analisis structural equation modeling. Hasil penelitian menunjukkan bahwa faktor ekonomi, attitude towards behaviour, dan subjective norms memiliki pengaruh signifikan terhadap minat. Faktor yang paling memengaruhi minat adalah subjective norms atau opini pihak ketiga mengenai asuransi kesehatan., Health insurance is an important instrument for transferring the risk of loss due to illness. The emergence of a pandemic causes an increase in health risks. This study aims to identify the factors that build interest in someone having health insurance, especially during or after a pandemic. The model in this study is the development of the Theory of Planned Behaviour which consists of attitudes toward behaviour, subjective norms, and perceived behavioural control, by adding health, economic, and Covid-19 factors to examine interest in having health insurance. The research involved 207 respondents with the criteria of being over 21 years old and having an income. This research uses structural equation model analysis techniques. The results of the research show that economic factors, attitudes toward behaviour, and subjective norms have a significant effect on interest. The factor that most influence interest is subjective norms or third party opinions regarding health insurance.
Keyword: Covid-19, SEM, TPB, Health insurance, interest

Judul: Analisis Minat Kepemilikan Asuransi Kesehatan Swasta dengan Structural Equation Modelling (Studi Kasus: Jawa Barat)
Abstrak: Asuransi kesehatan merupakan instrumen pengalih risiko yang berkaitan dengan kondisi kesehatan seseorang. Jumlah kepemilikan premi asuransi kesehatan swasta di Jawa Barat mengalami fluktuasi dari tahun 2013 – 2017. Minat merupakan suatu faktor penting yang mempengaruhi perilaku seseorang dalam memiliki asuransi kesehatan swasta. Penelitian ini bertujuan untuk mengetahui faktor-faktor yang membangun model minat kepemilikan asuransi kesehatan swasta dan mengetahui kontribusinya dalam mempengaruhi minat. Model minat yang digunakan berbasis pada Theory of Planned Behaviour (TPB), sementara pendugaan parameternya digunakan Structural Equation Modelling (SEM). Penelitian ini melibatkan 150 responden yang berdomisili di Jawa Barat, berusia 21 – 50 tahun, dan belum memiliki asuransi kesehatan swasta. Teknik sampling yang digunakan adalah non-probability snowball sampling. Hasil penelitian menunjukkan variabel laten sikap terhadap perilaku berpengaruh signifikan secara positif terhadap minat kepemilikan asuransi kesehatan swasta, dengan indikator usia sebagai faktor yang dominan., Health insurance is an instrument to divert risk related to one’s health condition. The number of private health insurance premium ownership in West Java fluctuated from 2013 – 2017. Intention is an important factor that affects one’s action to own private health insurance. This study aims to find out which factors define the private health insurance demand model and its contribution to intention. The intention model is based on the Theory of Planned Behaviour (TPB), whereas its parameter estimation uses Structural Equation Modelling (SEM). This study involves 150 respondents who reside in West Java, age ranging from 21 – 50, and do not own any private health insurance. Non-probability snowball sampling is used as the sampling technique. This study shows that attitude towards behaviour latent variable significantly affect intention positively, with age as the dominant indicator.
Keyword: SEM, TPB, asuransi kesehatan swasta, minat kepemilikan, private health insurance, ownership interest

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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