Judul: Pengembangan Aplikasi Portabel Penentuan Kelayakan Usaha Hortikultura Berbasis PHP.
Abstrak: Current efforts of national fruit development are still facing some agricultural problems. Therefore, the Ministry of Agriculture has made numerous attempts to increase national fruit production, including by disseminating Good Agricultural Practices (GAPs) and Standard Operating Procedure (SOP) for specific commodity. This research develops SIKUH (Sistem Informasi Kelayakan Usaha Hortikultura) that implements GAPs and SOPs. This application can help the horticultural business entity in deciding which commodity to be cultivated by providing cashflow calculation and its predicted cost requirement. The application is built as PHP-based portable application that can be saved on a USB flashdrive and easily installed on any Windows PC.
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Judul: Pengembangan Aplikasi Kelayakan Usaha Hortikultura Berbasis Object Oriented
Abstrak: The main challenge of national fruit production is how to improve its competitiveness from imported fruits. In order to increase production and productivity, Good Agriculture Practice (GAP) and Standard Operating Procedure (SOP) are needed. Horticultural Business Feasibility Study Application (SIKUH) which implements SOP can help investors in deciding what commodity should be planted. SIKUH based on Visual Basic 6.0 is currently available, but it can only run on a certain operating system. This research develops a Java based SIKUH as a platform-free desktop application. The business feasibility aspect implemented in this system only covers some financial aspects, namely Net Present Value (NPV) and Net Benefit and Cost Ratio (Net B/C).
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Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix