Judul: Rancang bangun sistem basis data produksi krisan potong pada PT alam Indah Nusantara Cianjur, Jawa Barat, Indonesia
Abstrak: PT Alam Indah Bunga Nusantara (PT ABN) adalah sebuah perusahaan produsen bunga krisan potong dengan kapasitas produksi yang cukup besar. Untuk mencapai hasil tersebut, PT ABN memiliki infrastruktur dan teknologi produksi yang memadai, di antaranya, green house dengan total luasan produktif 6.03 ha. Kegiatan operasional produksi krisan potong tersebut melibatkan bagianbagian dalam sistem produksi, yaitu bagian Mother Stock dan Nursery (MSN), Produksi, Hama dan Penyakit Tanaman (HPT), Teknik, Gudang, Panen dan Pascapanen. Semua bagian tersebut saling berinteraksi untuk mendukung keberhasilan target produksi. Oleh karena itu, kelancaran serta kelaikan data dan informasi yang mengalir di antara semua bagian tersbut harus terjamin baik. Permasalahan yang dihadapi adalah sistem administrasi data dan informasi yang ada saat ini bersifat semi manual dan terdesentralisasi di tiap bagian. Dengan demikian, sangat mungkin terjadi tingkat kesalahan manusia yang dapat mengakibatkan proses pengendalian operasi tidak optimal. Desentralisasi data menjadikan data dan informasi tertentu hanya terdapat di bagian itu saja. Kondisi ini dapat menimbulkan redundansi serta inkonsistensi data dan informasi, juga berpeluang mengakibatkan tidak sinerginya antarbagian pada sistem produksi. Untuk memecahkan masalah tersebut, perlu dibangun Sistem Basis Data Produksi Krisan Potong pada PT ABN (Simbapro Krisan Potong PT ABN). Sistem ini dibangun dengan tujuan memodifikasi sistem pengelolaan data yang semi manual dan terdesentralisasi menjadi terpusat dan terintegrasi, sehingga dapat menunjang sistem administrasi data dan informasi produksi krisan potong menjadi lebih efektif dan efisien…
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Database system production, Crysant cut flower, Green house, Nursery

Judul: Rancang Bangun Sistem Basis Data Produksi Krisan Potong PT Alam Indah Bunga Nusantara Cianjur, Jawa Barat, Indonesia.
Abstrak: PT Alam Indah Bunga Nusantara is a crysant cut flower company that have adequately big capacity production. In order to reach production target, PT ABN has sufficient infrastructure and production technology, i.e. green house with 6.03 ha of total productive area. The Operational production activity of crysant cut flower involves divisions of production system. That division are Mother Stock and Nursery (MSN), Production, Plant Disease (HPT), Technic, Store House, and Harvesting and Post Harvesting. All of these divisions interact each another for supporting production target. Thus, continuity and properness of data and information from all divisions have to be well proven. The problems appeared at the moment are semi manual and decentralized administration system of data and information. As a consequence, it is verily possible happened rate humans erros that cause inadequate operation control process. This decentralization of data make certain data and information only available on the certain division. Redudancy and inconsistency of data and information might occur on this condition. It might also cause divisions of production system no longer synergist. In oder to solve the problem, it was required to build database system of crysant cut flowers production (Simbapro Krisan Potong PT ABN). This system was built for modifying the manual and decentralized system become centralized and integrated system, then it will be able support the administration system of data and information of crysan cut flower production effective and efficient. The building method of this system was refered to SDLC (System Development Life Cycle) that consisted of five steps: investigation, analysis, design, implementation, and maintenance. The database system that had been built was desktop application and properly work on Ms Windows platform. It used Ms Acces 2007 and Visual Basic vii 6.0 (VB). Microssoft Acces 2007 (RDBMS) was used on building relational database and vb was used on building application interface. The former prototype of Simbapro Krisan Potong PT ABN had been built base on advisement of functional requirement that covered input master data form, operational data form, information form, and reports. Simbapro Krisan Potong PT ABN serves information inter divisions and centrally provided, thus expectedly able to integrate data and information of crysant cut flower production that suitable with each divisions need. This system only covered several functional aspect, i.e.: documentational master and operational production data, inventory information of crysant plant (mother, seed, plant), information of the plant desease, and information of operational production. So, this system could be improved as well as. The maintenance of system, as finally step of SDLC, was executed at 11 february 2010. User that evaluate the system was Mr.Tatan Supriatna (as crysant an expert). It resulted response on operational method, suggestion on information detail, and readiness on report completeness. Based on user response on operational aspect, this system was user friendly; on problem limitation aspect, the information service was adequately sufficient. However, this system still need to be improved during implementation. Meanwhile, on report aspect, the system was necessary to be completed.
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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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