Judul: Studi Kualitas Tidur Pegawai Institut Pertanian Bogor
Abstrak: Sleep is an important activity undertaken by humans and spend nearly a third of the human life time. Sleep is a condition in which the brain does not process information from sensory neurons and does not give orders to the motor neurons. Sleep quality of person can be determined using the Pittsburgh Sleep Quality Index (PSQI). The data of this research were obtained by giving questionnaires contain personal data and questions about the components of sleep quality during the past month There are seven components of sleep quality, subjective sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. The purpose of this study was to determine the sleep quality of employee of Bogor Agricultural University. Value of PSQI obtained from the calculation of the seven components, if someone has a value of PSQI < 5 then he has good sleep quality, and if someone has value of PSQI >5 then he has poor sleep quality. The purpose of this study is to determine the sleep quality of employee of Bogor Agricultural University. The proportion of male employee who had good quality sleep were equal to the proportion of female who had good quality sleep. As much as 48.27% of the total sample of employees have good sleep quality. As much as 62,5% of employees over the age of 51 years have poor sleep quality.
Keyword: 

Judul: Kualitas Tidur Buruh Pabrik di Kabupaten dan Kotamadya Bogor
Abstrak: Sleep is a condition when the brain does not process the information from sensory neurons and does not give the command to motor neurons. During the sleep, a person experiences memory consolidation encompassed process of storing and disposing of information obtained when awake. The aim of this research is to determine sleep quality of factory workers in Bogor region. The sleep quality of a person can be determined using the Pittsburgh Sleep Quality Index (PSQI). The sleep quality was obtained from seven components: subjective sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. Based on the observations in three factories in Bogor region, female workers have worse sleep quality than male workers. The majority of male workers who have good sleep quality contained in the 15-39 year age class and poor sleep quality are the 40-54 year age class. The majority of female workers who have good sleep quality contained in the 30-54 year age class and poor sleep quality are the 15-29 year age class.
Keyword: workers factory, sleep quality, PSQI

Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
Keyword: