Judul: Penjadwalan Petugas Satuan Pengamanan Menggunakan Nonpreemptive Goal Programming dan Implementasinya di Institut Pertanian Bogor.
Abstrak: Salah satu permasalahan yang sering ditemukan pada manajemen sistem keamanan adalah masalah penjadwalan Satuan Pengamanan (Satpam). Dalam penjadwalan Satpam perlu diperhatikan hal-hal yang terkait dengan banyaknya kebutuhan anggota Satpam pada setiap shift di setiap hari, keseimbangan banyaknya shift pagi, sore, dan malam yang diperoleh masing-masing anggota Satpam, keadilan penugasan antar anggota baik terkait dengan total shift penugasan maupun terkait dengan komposisi banyaknya shift pagi, siang, dan malam yang ditugaskan ke masing-masing anggota dan pola perpindahan penugasan anggota dari satu tipe shift (pagi, siang, atau malam) ke shift tipe lain. Permasalahan penjadwalan Satpam ini dimodelkan sebagai suatu model optimasi dengan tujuan meminimumkan total deviasi antara banyaknya anggota yang dibutuhkan dengan anggota yang ditugaskan untuk setiap shift selama periode perencanaan. Karena fungsi tujuan semacam itu, masalah ini dimodelkan sebagai Nonpreemptive Goal Programming. Model ini diimplementasikan untuk kasus penjadwalan Satpam di Institut Pertanian Bogor.
Keyword: penjadwalan, goal programming, nonpreemptive goal programming

Judul: Penjadwalan Petugas Keamanan Menggunakan Integer Linear Programming: Studi Kasus di Institut Pertanian Bogor
Abstrak: One of the problems that often arises in a security management system is the problem of scheduling security officers. A proper scheduling of security officers is required to avoid fatigue on officers, both psychologically and physically which can degrade the performance of the officers. This paper presents an integer linear programming model to establish a timetable for the security personnels. The objective function of this model is to minimize the total load shift of officers on the night shift so that the morning shift has a greater chance to be scheduled without reducing the total days of services. This model is then applied to schedule the security officers on campus of Bogor Agricultural University.
Keyword: minimize the total load., integer linear programming, scheduling, Bogor Agricultural University (IPB)

Judul: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology