Judul: Rancang Bangun Prototype Sistem Informasi Geografis Lahan Padi di Jawa Barat Berbasis Web
Abstrak: Pemetaan lahan padi di Indonesia kurang efisien karena masih dilakukan dengan survei langsung ke lapangan sehingga perlu analisis SIG dengan pemetaan yang sudah ada. Tujuan dari penelitan ini adalah merancang dan membangun prototype sebuah SIG berbasis web untuk pemetaan lahan padi di Jawa Barat. Pendekatan tahap perancangan sistem informasi dengan metode pengembangan System Development Life Cycle (SDLC). Data hasil olahan SIG yang digunakan dalam pembangunan prototype webSIG tersimpan dalam aplikasi Geoserver yang berperan sebagai web server dalam bentuk shapefile atau dalam format .shp. Informasi yang dapat diambil dari prototype webSIG yang dibangun ini terdiri dari peta lahan padi Jawa Barat dari tahun 2001 hingga 2015, luas lahan padi dan luas lahan kabupaten, serta pola tanam padi. Implementasi sistem dilakukan dengan instalasi sistem pada komputer server dan dapat diakses pada berbagai browser seperti, Google Chrome, Mozilla Firefox dan Microsoft Edge.
Keyword: pemetaan lahan padi, SIG, web server

Judul: Sistem Informasi Geografis Pertanian Tanaman Padi Sawah Kabupaten Karawang
Abstrak: Sistem informasi geografis (SIG) merupakan sistem berbasiskan komputer yang mempunyai kemampuan untuk menangani data geografis, meliputi: pemasukan, manajemen data (penyimpanan data dan pemanggilan lagi), pengolahan dan analisis, serta pengembangan produk dan pencetakan. SIG memiliki kelebihan dibanding sistem informasi pada umumnya, yaitu dapat mengintegrasikan data spasial (peta) dengan data tabular. Penelitian ini bertujuan membuat Sistem Informasi Geografis Pertanian Kabupaten Karawang (SIGPK) khususnya data pertanian padi sawah. SIGPK diharapkan dapat menyediakan informasi pertanian yang akurat sebagai bahan pertimbangan para pengambil keputusan untuk kemajuan pertanian di tanah air, khususnya di Karawang. Implementasi sistem menggunakan bahasa pemrograman Visual Basic 6.0, komponen MapObjects sebagai perangkat lunak pemetaan dan penghubung antara data spasial dengan bahasa pemrograman, Microsoft Access 2002 sebagai aplikasi basis data dan Crystal Reports 8.5 sebagai perangkat lunak untuk membuat cetakan laporan. Informasi yang ditampilkan meliputi luas tanam (ha), luas panen (ha), produksi (ton), produktifitas (ton/ha), perkembangan luas tanam dan luas panen (ha), efektifitas penggunaan lahan, curah hujan (mm), peta administrasi, peta golongan air, peta irigasi, peta stasiun cuaca dan peta penggunaan lahan yang merupakan hasil dari analisis citra Landsat. SIGPK menyediakan berbagai fasilitas untuk kemudahan pengguna, seperti: ekspor data spasial pada MapObjects ke dalam bentuk bmp. emf dan jpg; pencarian peta lewat Query Builder, eksplorasi peta; mencetak data pertanian dan mencetak peta, memperbaharui data tabular.
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Judul: The Effects of Variance of Interest rate to Variance of Annuity Future Values
Abstrak: Time value of money is a concept that refers to the difference of the value of money due to time difference. The value of money for present time would not be the same as the value of money in the future. The value of money for present time is called as Present Value (PV) of the money and the value of money for future time is called Future Value (FV) of the money. Determination the value of money, for present and future time, depends on the time and rate of return. The value of money is determined by several factors such as inflation, fluctuation of interest rates, and government policy in securities and taxation. Due to fluctuation of the value of money we need a FV formulation, it is useful for knowing whether an investment can be profitable or not, and this information is useful also in budget analysis. Annuity is defined as a series of payments made for a specific period. The payment, fixed or varied, can be made at the beginning or at the end of the period. Annuity paid at the beginning of the period is called annuity-due and annuity paid at the end of the period is called immediate annuity-certain. The accumulated value of the annuity after few years later is called as a final value or a future value. Burnecki et al. (2003) have discussed about the FV of a fixed-rate annuity in which payments are made according to the arithmetic or geometric series. They have also examined FV for annuities in which payments are made according to arithmetic or geometric series with random rates of interest. This paper examines FV for annuity-due in which payments are made according to arithmetic or geometric series with interest rates as a random variable, which is normal distribution ,  . Future value formula is expressed in recursive form. FV for annuity-due which payments are made according to the arithmetic or geometric series with random rates of interest is calculated by theoretical way and simulation way. The random rates of interest is denoted as k k i  i  , where k i an independent random variable; i is a constant and k  is a random variable which has normal distribution ,  . By using the determined parameters, a sequence of random rates of interest are generated for theoretical calculation. Meanwhile for the simulation, the random rates of interest is generated 1000 times for the simulation. The generated data give mean value, variance, and standard deviation. Moreover, error of mean value, variance, and standard deviation from the theoretical and simulation results are calculated. Error calculation uses Symmetric Mean Absolute Percentage Error (SMAPE). The smaller the value of SMAPE is the more accurate the simulation. The interest rate variances are varied from 0.000036 to 0.0001 to study the relationship between variance of rates of interest and variance of future value. The theoretical and simulation results show that when the variance of random rates of interest increases, then the variance of FV increases linearly. FV of the annuity-due in
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