Judul: The Influence of Effectiveness of Public Service Announcement Regarding COVID-19 on Changes in Village Community Behavior (Case: Cijayanti Village, Babakan Madang District, Bogor Regency)
Abstrak: Kemenkes RI membuat iklan layanan masyarakat mengenai COVID-19 dalam menangani tingginya kasus COVID-19, yang dapat diukur dengan menggunakan EPIC Model. Pengukuran efektivitas suatu iklan sangat penting untuk dilakukan, sehingga dapat mengubah perilaku masyarakat. Penulisan ini bertujuan untuk menganalisis iklan layanan masyarakat dalam mempersuasi masyarakat Desa Cijayanti serta menganalisis pengaruh persepsi masyarakat mengenai karakteristik dan efektivitas iklan layanan masyarakat terhadap tingkat perubahan perilaku masyarakat di Desa Cijayanti. Responden yang digunakan adalah 50 masyarakat Desa Cijayanti yang diperoleh melalui teknik cluster random sampling. Variabel yang digunakan dalam penelitian ini adalah karakteristik iklan layanan masyarakat, efektivitas iklan layanan masyarakat, serta perubahan perilaku. Hasil penelitian menunjukkan bahwa aspek kognitif tidak dipengaruhi oleh seluruh dimensi pada variabel karakteristik iklan layanan masyarakat dan efektivitas iklan layanan masyarakat. Aspek afektif dipengaruhi oleh daya tarik iklan, frekuensi penayangan iklan, derajat persuasi, dan tingkat kekuatan pesan. Selain itu, aspek konatif dipengaruhi oleh derajat persuasi dan tingkat kekuatan pesan., The Indonesian Ministry of Health makes public service announcement regarding COVID-19 in dealing with the high number of COVID-19 cases, which can be measured using the EPIC Model. It is very important to measure the effectiveness of an advertisement, so that it can change people's behavior. This writing aims to analyze public service announcement in persuading the people of Cijayanti Village and analyze the influence of public perceptions about the characteristics and effectiveness of public service announcement on level of changes in community behavior in Cijayanti Village. The respondents used were 50 people of Cijayanti Village obtained through cluster random sampling technique. The variables used in this study are the characteristics of public service announcement, the effectiveness of public service announcement, and changes in behavior. The results showed that the cognitive aspect was not influenced by all dimensions of the characteristics of public service announcement and the effectiveness of public service announcement. The affective aspect is influenced by the attractiveness of the ad, the frequency of ad serving, the degree of persuasion, and the level of message power. In addition, the conative aspect is influenced by the degree of persuasion, and the level of message power.
Keyword: behavior change, EPIC Model, public service announcement

Judul: The Effectiveness of Public Service  Advertisements Complete Dose Covid-19 Vaccination on YouTube in College  Students of Bogor Regency
Abstrak: Program vaksinasi Covid-19 dosis lengkap merupakan upaya untuk mengatasi penyebaran virus Covid-19. Namun, masih terdapat mahasiswa yang enggan melaksanakan vaksinasi hingga dosis lengkap karena percaya bahwa pandemi Covid-19 sudah selesai dan menganggap dirinya bukan kelompok yang beresiko tinggi. Kemenkes RI memublikasikan Iklan Layanan Masyarakat (ILM) di platform YouTube dengan judul Kampanye SIAP – Tematik untuk mensosialisasikan vaksinasi Covid-19 dosis lengkap. Tujuan dari penelitian ini menganalisis hubungan antara karakteristik iklan dan karakteristik pengguna YouTube dengan efektivitas Iklan Layanan Masyarakat Vaksinasi Covid-19 Dosis Lengkap. Penelitian ini menggunakan pendekatan kuantitatif dengan instrumen kuesioner dan pendekatan kualitatif melalui wawancara mendalam. Hasil penelitian menunjukkan 1) karakteristik iklan layanan masyarakat tersebut sangat baik dalam daya tarik dan kualitas isi pesan dan cukup baik pada frekuensi penayangan; 2) efektivitas iklan layanan masyarakat sangat efektif pada seluruh aspek yaitu awareness, comprehend, interest, intention, dan action; 3) karakteristik pengguna YouTube tidak memiliki hubungan yang nyata dengan efektivitas iklan layanan masyarakat; 4) karakteristik iklan memiliki hubungan yang sangat nyata dengan efektivitas iklan layanan masyarakat.
Keyword: Covid-19, CRI model, Iklan layanan masyarakat

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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