Judul: Knowledges, Attitudes, and Practices of Community Towards Urban Pest in Rembang, Central Java
Abstrak: Pertumbuhan penduduk telah menimbulkan permasalahan di beberapa sektor. Salah satunya adalah pembangunan daerah permukiman untuk tempat tinggal yang akan mengurangi habitat alami beberapa kelompok serangga dan non-serangga. Oleh karena itu, daerah permukiman sering terganggu oleh kehadiran hama dari kelompok serangga dan non-serangga. Hama tersebut di antaranya, tikus, nyamuk, rayap, kecoak, lalat, semut dan sebagainya. Permasalahan umum yang ditimbulkan oleh hama-hama tersebut sering berkaitan dengan kenyamanan, kesehatan, dan estetika. Penelitian ini bertujuan mengetahui pengetahuan, sikap, dan tindakan masyarakat khususnya di Kabupaten Rembang, Jawa Tengah terhadap kehadiran hama di permukiman. Penelitian ini dilakukan dengan metode wawancara sebanyak 68 responden secara acak yang tersebar di empat kecamatan yaitu, Kecamatan Rembang, Kragan, Sarang, dan Lasem. Wawancara dilakukan menggunakan kuesioner terstruktur mengenai pengetahuan, sikap, dan tindakan responden terhadap hama permukiman. Berdasarkan hasil wawancara, mayoritas masyarakat menganggap kehadiran hama permukiman cukup mengganggu. Hama permukiman yang banyak ditemukan di empat lokasi survei adalah nyamuk (51,1%), tikus (22,4%), semut (10,7%), kecoak (6,2%), lalat (6,2%), laba-laba (2,1%), dan rayap (1,1%). Berbagai cara pengendalian dilakukan seperti penggunaan pestisida dan perangkap. Namun, mayoritas masyarakat menggunakan pestisida sebagai pilihan utama untuk mengendalikan hama permukiman., Population growth has caused problems in several sectors. One of them is development residential areas for residence which will reduce natural habitat of several groups of insects and non-insects. Therefore, residential areas are often disturbed by the presence of pests from insect and non-insect groups. These pests consist of rats, mosquitoes, termites, cockroaches, flies, ants, etc. Common problems caused by these pests are related to comfort, health and aesthetics. This study aims to determine the knowledges, attitudes and practices of the people in Rembang Regency, Central Java towards the presence of pests in settlements. This research was conducted by interviewing 68 respondents randomly spread over four sub districts namely Rembang, Kragan, Sarang, and Lasem. Interviews were conducted using a structured questionnaire regarding the knowledges, attitudes, and practices of community towards urban pests. Based on interviews, the community considered the presence of urban pests to be quite disturbing. Urban pests that were commonly found in the four survey locations were mosquitoes (51,1%), rats (22,4%), ants (10,7%), cockroaches (6,2%), spiders (2,1%), and termites (1,1%). Various methods of control are carried out such as the use of pesticides and traps. However, the majority of people used pesticides as the main choice in controlling urban pests.
Keyword: Interviews, Pesticides, Traps

Judul: Knowledge, Attitude, and Practice of Community towards Urban Pests in Garut Regency, West Java Province
Abstrak: Kawasan yang nyaman dan bersih menjadi sesuatu yang ideal dalam terbentuknya sebuah permukiman. Namun, terdapat beberapa gangguan yang dapat menyebabkan ketidaknyamanan, salah satunya hama permukiman. Hama permukiman dapat menimbulkan berbagai permasalahan, terutama yang berkaitan dengan kesehatan, kenyamanan, dan estetika. Penelitian ini bertujuan untuk memperoleh informasi dan melakukan analisis tentang pengetahuan, sikap, dan tindakan masyarakat Kabupaten Garut terhadap hama permukiman serta mengetahui pengelolaan dan pengendalian hama permukiman pada berbagai pusat perbelanjaan yang ada di Kabupaten Garut. Kegiatan penelitian meliputi penentuan responden sebanyak 68 orang secara acak yang tersebar di empat kecamatan yakni Kecamatan Garut Kota, Karangpawitan, Tarogong Kidul, dan Tarogong Kaler. Pengumpulan data dilakukan melalui wawancara menggunakan kuesioner terstruktur tentang pengetahuan, sikap, dan tindakan masyarakat terhadap hama permukiman, dan analisis data. Hasil penelitian menunjukkan, pengetahuan, sikap, dan tindakan masyarakat terhadap hama permukiman di Kabupaten Garut berbeda beda. Perbedaan tersebut diakibatkan oleh beragam faktor yang memengaruhinya seperti umur, pendidikan, dan pendapatan. Masyarakat tahu dan menemui berbagai jenis hama permukiman utama seperti nyamuk, kecoa, lalat, rayap dan tikus. Masyarakat mengambil berbagai macam sikap dan tindakan berkaitan dengan kehadiran hama permukiman di sekitar lingkungannya, seperti penggunaan pestisida dan perangkap hama. Pengelolaan dan pengendalian hama permukiman pada pusat perbelanjaan di Kabupaten Garut umumnya telah menggunakan berbagai macam alternatif pengendalian, seperti penggunaan perangkap dan penggunaan jasa pest control., A comfort and clean area is ideal for human settlement in urban areas. However, there are some disturbances that can cause discomfort, one of them is urban pests. Urban pests can cause various problems, especially problems related to health, comfortability, and aesthetics. The aims of this study was to obtain information and perform analysis about knowledge, attitudes, and practices of the community towards urban pests in Garut Regency. The aims was also to obtain information about management and controls of urban pests at shopping centers in Garut Regency. The research activities included determining respondents as many as 68 people randomly spread over four subdistrics namely Garut Kota, Karangpawitan, Tarogong Kidul, and Tarogong Kaler. Data collected through interviews using a structured questionnaire about the knowledge, attitude, and practices of the community towards urban pests. Data was analyzed using Microsoft Excel 2016. The results showed that knowledge, attitude, and practice of community towards urban pests in Garut Regency are different. These differences are caused by various influencing factors such as age, education, and income. The respondents knew and encountered various types of urban pests such as mosquitoes, cockroaches, flies, termites and rats. The communities took various attitudes and action related to the presence of urban pests in their surroundings, such as using pesticides and traps. Management and controls of urban pests at shopping centers in Garut Regency have used variety of alternative controls, such as the use of traps and pest control services.
Keyword: Control, Urban pests, Pesticide, Trap

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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