| Nama Pengarang | : | H. Ngaderman dan S. A. Sulandari, A. B. Setio Utomo |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 159 - 168 |
| Abstraksi Narasi | : | Visualization of the compton scattering a kind of computational research in physics which gives a clear comprehension of the compton scatering phenomenon though a computrer program simulation. The involved parameters in the compton scatering researche consist of input parameters, i. e. the wavelegth of incident phoyo(..) nd the angle of scattered photon(..) and autput parameters, i. e. the inciden photon energy (..) the scattered photon energy (..), the angle scattered elektron (..), the wavelength of scattered photon (...), and the kineticenery of elektron (..),. The visualization has been made using turbo pascal 7.0. |
| Nama Pengarang | : | Bagus Jaya Santosa |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 187 - 194 |
| Abstraksi Narasi | : | The seismogram data of eathquake C022501L have been analized by seismogram comparison at station COLA (Canada) to investigate the earth stukture beneath the Canadian simultaneously. The synthetic saismogram is calculated by GEMINI. The input is intially theearth model IASPE191, PREMAN, and the CTM solusion for quake to calculate the syntetic. The seismografm comparison show a real deviation of the wavefrom of some phase waves. The researche is counducted to correct the discrepancies found at P, S, Love, Rayleigh, and ScS waves at the staion COLA. Seismogram fitting obtained at amount espencially of love wave. The earth stukture obtained indicates anisotropy beneath the Canadia west coast in the upper mantle and also leyers down to the CMB depth. |
| Nama Pengarang | : | Sugimin, Soeparna Darmawijaya dan Ch. Rini lndrati |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 125 - 133 |
| Abstraksi Narasi | : | A fungsion F is sain to to be lebesgueintergrape on [a. b] if an only if thee is a fungsion F which is absoluteli continuous on [a,b] such that its derivative F'(x)= F(x) almost everwhere on [a,b]. Denjoe definet his spesial denjoe integral by a method of extension of the lebesgue integral, i. e. A fungsion F is said to be spesial denjoe intergrable on [a, b] if there is continuous and ACG on [a, b] such that ist derivative F'(x)= F(x) almost everywhere on [a,b ] this studi was intended to generalize the spesial denjoy integral in the real line to the Euclidies space Rn. The generalisation was done to the definition and properties of the special denjoy integral. This study was based on the interval fungsion on I (E), the collection of all interval subsets of a cell ... . in doing such a generalization, we always maintained that the devinition and properties in the real line werte kept as their special case. |
| Nama Pengarang | : | Mardi Santoso dan Arif Fadlan |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 119 - 124 |
| Abstraksi Narasi | : | Doben - von miller reaction 3 ,4, 5- trimethoxyaniline with acrolein was explored in order to afford new quinoline hydrogen sulfate and potasium sulfate at 215 -- 230 c for thee hours in 15 % yield. Reaction 3 ,4, 5- trimethoxyaniline with acrolein gave six products, thee of them have been purified and identifies as 6, 5, 7 -trimethoxyquioline (27%); 5, 6,7- trimethoxy- 1, 2, 3, 4- tetrhhydroquinoline (43%); 8, 9, 10- trimethoxy- 2, 3, 6, 7- tetrahydro- 1H, 5H - pyrido [3, 2, 1-ij]quinoline (30%). |
| Nama Pengarang | : | lgn. Edi Santosa |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 177 - 186 |
| Abstraksi Narasi | : | A simple system for measuring the wawelength of laser ligh is presented. The system consists of two Michelson interferometers, which are coumpled together, and a movable mirror. The performan ce of the system has been tested to determine the wavelength of HeNe and pointer leser. The accuracy of the system can range of the movable mirror limits its accuracy. |
| Nama Pengarang | : | E.Ristin Pujiindiyati |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 107 - 118 |
| Abstraksi Narasi | : | Aquachem is na software package specifically for management and interpretation of aqueous geochemicl data. This program covers a range of creation hydrochemical database, cheking analytical data, plotting data in visual grapics, simple or complex calculation of hydrochemical data set. To make data interpretation easier, this program also provides thirteen types of visual grapics such as piper, durov, schoeller, ternary, and stiff. In this paper, aquachem program was used for interpretation of major anion and cations contained in shallow grounwater and irigation channel of Citarum at Karawang site. Grounwater samples ware taken from dug or pump wells wilt 15 - 40 m depths, cariet aut in dry seasion of juliu - august 2002. Composition of anions and cation caused mixing or evaporation process can be calculated easily throug program. It was also estimated that six percent of Kr-SB-2 groundwater was mixed with seawater. some visual grafic showed that Citarum river has water of NaCO3 or fres water whereas a few of grounwater smples could be classified as NaCI water tipe or rather brackkish water. Most shallow grounwater of Karawang indicated a mixing composition of Caso4, Ca-Mg- HCO3 and NaHCO3 water type. |
| Nama Pengarang | : | Fahru Nurosyid, Yofentina lriani, dan Joko Santoso |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 169 - 176 |
| Abstraksi Narasi | : | The effect of mechanical stirring speed to the crytal stucture an corrosion rate of copper on iron using electroplating method has been studied. The variation of tmachanical stirring are 100 rpm, 200 rpm, 250 rpm, 300 rpm, and whithout stirring for 30 minutes, the voltage betweeb enode nd cathode is 0,6 volt and the research is done at room temperature. The analisis of X-ray diffraction result edicates that copper coating on iron using elektopating method without stirring and with stirring have face center cubin (fcc) crstal stukture with lattice parameter a = 3,267 A, interplanar distance 1,273 A with crystal plane miler indek (220). The copper coating on iron with stirring speed of 200 rpm has the smallest value of corrosion rate, i. e. (,....,) mmpy. |
| Nama Pengarang | : | Liem Chin |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 151 - 158 |
| Abstraksi Narasi | : | A lookback option is in option whose payoff fungsion depends on the maximum or minimum of the underlying asset ever some prescribed period. like the eropeen option, we can theoretically price this option in the Black- Sholes environment. The maximum or minimum of theasset is measured discretely. The moidel for pricing a lookback option is a partial diferential equesion with jump condition solved using the Crank - Nicalson numerical method. The lookback option tends to be more expensive that the European. |
| Nama Pengarang | : | Herry Pribawanto Suryawan |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 135 - 144 |
| Abstraksi Narasi | : | Let {fn} be a sekuance of real - valued converging pointwise to a fungsi f on a closed and bounded interval [a, b] and supose that each of the fungtion {fn} is reimann intergrable on [a,b]. It does'n always follow that the limit {a,b], the equation ....... may not hold. The iam of this paper si to find furtegrable and the equation..... holds. |
| Nama Pengarang | : | Frans Susilo |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 145 - 149 |
| Abstraksi Narasi | : | We introduce the concept of hemology relation betwen fuzzy subgroun of a grou, and prove some importal properties of the relation, espasially that homologous fuzzy subgroun are isomorphic and havethe same index. |
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