Judul: Food Coping Strategy, Food Security, and Nutritional Status of Children in Fisherman Family During COVID-19 Pandemic
Abstrak: Penyebaran COVID-19 yang semakin meluas berdampak pada sektor kesehatan, sosial, dan ekonomi termasuk di komunitas nelayan yang merupakan golongan menengah ke bawah. Penelitian ini bertujuan untuk menganalisis food coping strategy, ketahanan pangan, dan status gizi anak pada keluarga nelayan saat pandemi COVID-19. Desain penelitian yang digunakan adalah desain cross sectional study dengan jumlah subjek penelitian sebanyak 61 rumah tangga nelayan. Uji analisis yang digunakan terdiri dari analisis deskriptif univariat dan analisis inferensia chi square. Hasil analisis deskriptif memperlihatkan sebagian besar tindakan food coping strategy yang dilakukan oleh keluarga nelayan termasuk kategori rendah (59%). Lebih dari separuh keluarga nelayan dapat dikategorikan menjadi keluarga rawan pangan (73,8%). Prevalensi anak yang termasuk gizi kurang yaitu 14,8% sedangkan yang termasuk katgeori gizi lebih yaitu 29,5%. Hasil analisis bivariate chi square memperlihatkan adanya hubungan yang signifikan antara pekerjaan ibu, pendapatan, pengeluaran total dengan food coping strategy. Tidak terdapat hubungan yang signifikan antara karakteristik sosial ekonomi dan ketahanan pangan. Terdapat hubungan yang signifikan antara pekerjaan ibu, pendapatan, dan pengeluaran total dengan status gizi anak. Hubungan antara food coping strategy, ketahanan pangan, dan status gizi anak tidak signifikan., The widespread of COVID-19 has an impact on the health, social, and economic sectors including in the fisherman family which is categorized as middle to lower class. This study aims to analyze food coping strategy, food security, and nutritional status of children in fisherman family during COVID-19 pandemic. The research design used a cross sectional study with number of subjects as many as 61 fisherman families. Analysis is divided into two category which is descriptive analysis and inferensia analysis that used chi square test. Result show that most of the food coping strategies carried out by fisherman's families are in the low categories (59%). More than half of fisherman family is categorized as food insecurity family (73,8%). The prevalence of children belonging to thinness is 14,8% while the percentage of overweight children are 29,5%. Results of chi square test showed a significant relationship between maternal work, income, and total expenditure with food coping strategy. There is no significant relationship between socio economic characteristic of fisherman family with food security. There is a significant relationship between maternal work, income, and total expenditure with the nutritional status of children. Relationship between food coping strategy, household food security, and nutritional status of children was not significant.
Keyword: COVID-19, Food coping strategy, Nutritional status, Fisherman

Judul: Analysis of Covid-19 Knowledge, Intake, Eating Behavior,  Stress Level, and Quality of Life in Students during Pandemic
Abstrak: Penelitian ini bertujuan menganalisis hubungan tingkat pengetahuan terkait Covid-19, asupan makanan, perilaku makan, tingkat stres, dan kualitas hidup mahasiswa saat pandemi. Desain penelitian ini adalah studi cross sectional dengan jumlah subjek sebanyak 81 mahasiswa Gizi Masyarakat, Institut Pertanian Bogor yang dipilih secara purposif. Penelitian dilakukan pada bulan Juli 2022–September 2022. Pengumpulan data melalui wawancara dan kuesioner online. Tingkat pengetahuan terkait Covid-19 pada subjek tergolong dalam kategori sedang (60%). Rata-rata skor perilaku makan pada subjek paling banyak yaitu perilaku makan external eating. Sebagian besar (46%) subjek mengalami stres sedang. Hasil analisis menunjukkan bahwa terdapat hubungan yang signifikan antara tingkat stres dengan emotional eating, domain hubungan sosial dan domain lingkungan pada kualitas hidup (p<0,05). Selain itu, terdapat hubungan yang signifikan juga antara variabel uang saku dengan tingkat stres (p<0,05). Tidak ada hubungan yang signifikan antara pengetahuan Covid-19 dengan tingkat stres (p>0,05). Hal ini juga terjadi hubungan yang tidak signifikan antara variabel jenis kelamin, usia, tempat tinggal, ketersediaan internet, dan angkatan dengan tingkat stres (p>0,05). Begitupula dengan variabel tingkat stres dengan tingkat kecukupan zat gizi makro dan mikro, perilaku makan external eating dan restrained eating, serta domain fisik dan psikologis pada kualitas hidup (p>0,05) yang juga menunjukkan tidak adanya hubungan yang signifikan., The aims of this study is to analyze the correlation between Covid-19 knowledge, food intake, eating behavior, stress level, and quality of life during pandemic. The design of this research is cross sectional study with 81 subjects of community nutrition, IPB University students selected by purposive sampling. This research was conducted in July 2022–September 2022. Data was collected through interview and online questionnaire. The level of Covid-19 knowledge of the subjects is in the medium category. The average score of eating behavior in the most subjects is external eating. Most of the subjects (46%) experienced moderate stress. The result showed that there was significant correlation between stress level with emotional eating, social relationship and environmental health in quality of life (p<0.05). There was a significant correlation between allowance with stress levels (p<0.05). There was no significant correlation between Covid-19 knowledge with stress level (p>0.05). Also, there was no significant correlation between gender, age, residence, internet network, and years of college with stress level (p>0.05). The same for variables of stress levels with the level of adequacy of macro and micro nutrients, external eating and restrained eating, physical and psychological in quality of life (p>0.05) also showed no significant correlation.
Keyword: Covid-19 knowledge, Eating behavior, Nutrient adequacy level, Stress  level, Quality of life

Judul: Penggunaan Metode Homotopi untuk Menyelesaikan Persamaan KdV (Korteweg-de Vries)
Abstrak: Natural phenomena can be explained using nonlinear mathematical models. In this paper, we studied the solution of KdV equation using the Homotopy method. The KdV equation is used for describing both surface and internal waves. One of the solutions is called a solitary wave. The use of homotopy method to solve the KdV equation required a nonlinear operator which was determined by the nonlinear form of the KdV equation itself. Based on this operator, a recursive formula was obtained to get a sequence of the KdV solution. The higher the sequence order of the sequence used, the closer to the exact solution of the KdV equation.
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