Judul: Pengetahuan, Sikap, dan Perilaku Mencegah Terinfeksi Covid-19 pada Generasi Y di Kabupaten Ponorogo, Jawa Timur
Abstrak: Generasi Y memiliki jumlah proporsi tertinggi dalam kasus terinfeksi Covid-19. Hal ini disebabkan oleh tingginya mobilitas dan aktivitas di luar rumah. Penelitian ini bertujuan untuk menganalisis pengaruh karakteristik individu, pengetahuan, dan sikap terhadap perilaku mencegah terinfeksi Covid-19 di Ponorogo. Sampel dalam penelitian berjumlah 100 orang dengan rentang usia 2035 tahun dan jumlah responden berjenis kelamin laki-laki sebesar 16 orang dan perempuan sebanyak 84 orang. Teknik penarikan sampel menggunakan voluntary sampling. Kuesioner dibuat dalam bentuk gform dan link disebarkan pada pertengahan bulan April 2021. Analisis data menggunakan uji deskriptif dan SEM-PLS. Hasil SEM-PLS menunjukkan adanya pengaruh yang signifikan jenis kelamin terhadap pengetahuan dan perilaku mencegah terinfeksi Covid-19 serta sikap terhadap perilaku mencegah terinfeksi Covid-19. Hal ini menunjukkan bahwa perempuan memiliki pengetahuan dan perilaku menhadapi pandemi Covid19 lebih tinggi dari pada laki-laki serta sikap yang baik akan meningkatkan perilaku mencegah terinfeksi Covid-19. Sosialisasi dan perilaku mencegah terinfeksi Covid-19 perlu ditingkatkan terutama kepada generasi Y laki-laki. Kata kunci : Covid-19, Generasi Y, pengetahuan, perilaku mencegah, sikap, Generation Y has the highest proportion of cases infected with Covid-19. This is due to the high mobility and activities outside the home. This study aims to analyze the effect of individual characteristics, knowledge, and attitudes on behavior to prevent infection with Covid-19 in Ponorogo. The sample in the study amounted to 100 people with an age range of 20-35 years and the number of male respondents was 16 people and women were 84 people. The sampling technique used is voluntary sampling. The questionnaire was made in the form of a form and a link was distributed in mid-April 2021. Data analysis used descriptive tests and SEM-PLS. The results of the SEM-PLS show that there is a significant influence of gender on knowledge and behavior to prevent infection with Covid-19 as well as attitudes towards behavior in dealing with the Covid-19 pandemic. This shows that women have higher knowledge and behavior in dealing with the Covid-19 pandemic than men and a good attitude will increase behavior to prevent infection with Covid-19. Socialization and behavior in dealing with the Covid-19 pandemic need to be improved, especially for the male Y generation.
Keyword: Pengetahuan, Sikap, Perilaku Mencegah Terinfeksi, Covid-19, Generasi Y

Judul: Pengaruh Pengetahuan dan Persepsi terhadap Motivasi Melakukan Vaksinasi COVID-19 Antargenerasi
Abstrak: Program vaksinasi massal menjadi upaya utama yang dilakukan dalam mengatasi pandemi COVID-19 di Indonesia. Motivasi individu untuk melakukan vaksinasi COVID-19 penting untuk diteliti sebagai prediktor keberhasilan dalam mencapai target sasaran vaksinasi nasional. Penelitian ini bertujuan untuk menganalisis perbedaan, hubungan, serta pengaruh pengetahuan dan persepsi terhadap motivasi melakukan vaksinasi COVID-19 antargenerasi. Penelitian ini menggunakan desain explanatory dan metode voluntary sampling dengan total 201 responden yang berasal dari generasi X, Y, dan Z. Hasil penelitian menunjukkan bahwa terdapat perbedaan yang signifikan pada pengetahuan, persepsi, dan motivasi melakukan vaksinasi antargenerasi. Penelitian ini menemukan bahwa lebih dari separuh responden memiliki tingkat pengetahuan terkait vaksinasi pada kategori sedang. Responden generasi X dan Y cenderung memiliki persepsi negatif terhadap vaksin serta motivasi yang rendah untuk melakukan vaksinasi. Sedangkan generasi Z memiliki persepsi dan motivasi vaksinasi yang tergolong moderat. Hasil uji regresi menunjukkan bahwa jumlah tanggungan, status vaksinasi, dan persepsi terkait vaksinasi memiliki pengaruh signifikan terhadap motivasi melakukan vaksinasi COVID-19., Vaccination program has become the most anticipated intervention in minimizing the spread of COVID-19, including in Indonesia. Individual motivation to receive COVID-19 vaccination is believed as one of the important predictor in achieving national vaccination targets. This study aims to analyze the differences, relationships, and the influence of knowledge and perceptions toward motivation to receive COVID-19 vaccine among generations. This study used an explanatory design and voluntary sampling method with a total of 201 respondents from generation X, Y, and Z. This study showed that there was a significant difference in term of knowledge, perception, and motivation between generations. More than half of respondents had a moderate level of knowledge related to vaccination. Moreover, respondents of generation X and generation Y were more likely to have poor perception regarding COVID-19 vaccination and lack motivation to receive the vaccine. Meanwhile, generation Z recorded a moderate level of perception and motivation regarding vaccination. The results of the regression test showed that number of dependents, vaccination status, and perceptions related to vaccination had a significant influence on motivation to receive COVID-19 vaccination.
Keyword: COVID-19 vaccination, intergenerational, knowledge, motivation, perception

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.
Keyword: