Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

Jurnal Penelitian Saintek

saintek
Website

Published by Universitas Negeri Yogyakarta

ISSN : 14123991 EISSN : 25287036 DOI : 10.21831

Core Subject : Science,

Decision Sciences, Operations Research & Management

Arjuna Subject : -

Articles 7 Documents

Search results for , issue "Vol 18, No 2: Oktober 2013" : 7 Documents clear

DETERMINATION OF AMERICAN TYPE STOCK OPTION PRICE WITH DISTRIBUTION DEVIDEN USING FINITE ELEMENT METHOD Nikenasih Binatari; Rosita Kusumawati; Ade Latif
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Changes in stock price, either when the stock price increases or decreases, can be exploited for profit. One of the investment instruments that can be used to take advantage of the stock price change is a stock option. In addition, stock options can also be used to minimize the amount of losses that may be suffered by investors. One of the keys to take advantage of the stock options is the precision determination of the type of stock option exercise price. Black-Scholes model is a model that has been widely used as an approach to solve the problem of determining the exercise transaction costs, risk-free interest rates, and changes in stock prices follow a random pattern. Meanwhile, most of the stock options are traded in fact pay dividends. Because the most heavily traded stock options is stock options American type, then the purpose of this study was to determine the Black-Scholes option pricing American type stock with the dividend model using finite element method. At case one year expiration date, execution price $10, risk-free interest rate 10%, paid dividend proportion 5%, stock price volatility 0,32, call option price at market $1,5 and put option price at market $6 then the result shows that call option price is $1,8 and put option price is $5,3. Because call option price is cheaper then investor better buy the option while for put option price, because it’s more expensive then investor better not buy the option. price of stock options. The assumption of this model is not giving the stock dividend, no transaction costs, risk-free interest rates, and changes in stock prices follow a random pattern. Meanwhile, most of the stock options are traded in fact pay dividends. Because the most heavily traded stock options is stock options American type, then the purpose of this study was to determine the Black-Scholes option pricing American type stock with the dividend model using finite element method. At case one year expiration date, execution price $10, risk-free interest rate 10%, paid dividend proportion 5%, stock price volatility 0,32, call option price at market $1,5 and put option price at market $6 then the result shows that call option price is $1,8 and put option price is $5,3. Because call option price is cheaper then investor better buy the option

DYNAMICS SYSTEM ANALYSIS AND MODELING ON CRANE BRAND THREE DIMENSIONS (3D) WITH LOADING COSTS Moh Khairudin
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This paper presents the development of a dynamic modelling of a three-dimensional (3D) crane with payload. A 3D crane with simultaneous travelling, traversing, and hoisting is considered. The dynamic equations of motion of the crane system are derived using the Lagrange’s method and represented in nonlinear differential equations. Simulation is performed using Matlab/Simulink to investigate the dynamic behaviour of the system both in time and frequency domains. System responses including positions of rail, trolley and payload, and payload sway angle are obtained and analyzed. The results show for sway angle, exhibits significant and persistent sway angle of ±0.09 rad. On the other hand, the sway angle, shows a significant initial sway angle of ±0.07 rad. Then the system coscillates with a persistent angle of ± 0.009 rad.

ACTIVITY OF SITOTOKSIK ETANOL EXTRACT PLANT GROWTH (Cynometra ramiflora Linn) ON HEAVY CELL, T47D and WiDR Haryoto Haryoto; Muhtadi Muhtadi; Peni Indrayudha; Tanti Azizah; Andi Suhendi
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Cynometra ramifolia Linn is known as Sala plant. This plant, especially in Solo City categorized as rare plant and traditionaly used to cure uric acid, diabetes, hypertension, and others pain. It is interesting to know the other activities by done the test for human cancer cell-lines. This research objective to identify the cytotoxicity effects of ethanol extract from C.ramiflora the stem bark and leaves against T47D, HeLa and WiDr cancer cell lines. The cytotoxicity test of ethanol extract from C.ramiflora the stem bark and leaves determined by MTT assay by calculating the level of IC50 which was based on the percentage of the cell death following the 24 hours incubation with the extract. The results showed that ethanol extract of stem bark has cytotoxic effect to HeLa, T47D and WiDr cell-lines with the IC50 of 1000; 0,90 and 6,29 g/mL respectively. The leave cytotoxic effect to HeLa, T47D and WiDr cell-lines with the IC50 of 1,92; 6,37 and 0,41 g/mL respectively. This research indicated that the ethanol extract isolated from C. Ramiflora leaves a selective cytotoxicity effect to WiDr cell line.

CONSERVATION OF NATURAL ENEMY AS A BIOLOGICAL CONTROL WITH FISHING ECOSYSTEM MANAGEMENT Victoria Henuhili; Tien Aminatun
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This research aims were to collect the diversity of natural enemies lived in rice agroecosystem and to observe which management system of rice agroecosystem can conserve natural enemies.There were two kinds of rice agroecosystem observed in this research, multicropping system (surjan system) and monocropping system (non surjan system). There were two parts of surjan fields, aquatic lower part planted with rice and terrestrial higher part planted with vegetables. The surjan fields were different from non surjan fields that were planted with rice only. Non surjan fields were had one part, that was aquatic part. Natural enemies collecting of surjan fields and non surjan fields was done to get conclusion that which system conserved natural enemies more. This researh results were : (1) Surjan fields had more kinds of natural enemies than non surjan fields; (2) The management system of rice agroecosystem that conserved natural enemies more was multicropping system in surjan fields.

CALCULATION OF RADIONUKLIDA FORMATION ON ION CYCLOTRON SOURCE COMPONENTS Silakhudin Silakhudin
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This paper presents a prediction of radiation exposure on particle accelerator of cyclotron type that was began with calculation of radionuclides formationon ion source component has been done. The objectives of research are to identify the formation of radionuclides and probability of its radial distribution on ion source component. The methods of this research are to identify proton nuclear reaction with ion source component, determine of ion energy as radius function then converted to nuclear reaction cross section versus radius, and to determine the relation of ion beam transmission coefisient as function of radius. The probability of radionuclide formation can be determined with multiplying the reaction cross section and transmission coeffisient on certain radius. The result showed that the 65Zn and 63Zn radionuclides are important to be considered at the radius of several centimeters towards the extraction radius which location at maximum yields of radionuclides formation of 100% relatively on the radius of 36 cm and 38 cm respectively.

USE OF PRESIPITATION METHODS TO REDUCE Cu IN THE LIQUID WASTE INDUSTRY LIQUID IN KOTAGEDE Chanel Tri Handoko; Tri Budi Yanti; Halimatus Syadiyah; siti marwati
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This research was to determine the optimal pH decreased level of Cu using precipitation method and effectivity of the reduction Cu metal level using lime solution as precipitatingagent. The research was conducted by collecting the silver industrial wastewater samples from 3 different places, analyzing the initial Cu level, precipitation treatment of the sample, and analyzing the Cu level after precipitation process. Precipitation process was done by reacting the waste water sample and a solution of Ca(OH)2 0.2 M at pH variation of 7, 8, 9, 10, and 11, then allowed to settle for 24 hours. Then the optimal pH of the experiment was used as a pH in the precipitation process using 5% lime solution. Analysis of the Cu metal level in this study was using AAS instrument. Sample C has pH value =10.3 (alkaline), so no further precipitation process is carried out on sample C. Optimal pH precipitation to decresase Cu level is 8. Cu level after treatment precipitation using 5% lime solution at pH 8 is 0.6583 ppm for sample A and 0.4697 ppm for sample B. When compared with the initial Cu level it is 28132.7430 ppm for sample A and 11233.467 ppm for sample B, the precipitation method using lime solution effective to reduce Cu level.

SITRONELAL CYCLE-HYDROGENATION TANDEM CREATED ZrO MONTMORILLONIT WITH VARIATION METHOD REACTION Is Fatimah; Septian Perwira Yudha; Dwiarso Rubiyanto; Thorikul Huda
Jurnal Penelitian Saintek Vol 18, No 2: Oktober 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Tandem cyclization reaction towards menthol-citronellal hydrogenation reactions through one-step reaction with a variety of methods using pillared montmorillonite catalyst ZrO2 (Zr-MMT) have been done. The research aimed to determine the effectiveness of Zr-MMT catalyst in the reaction process with two different methods; first method comprises reacting flow system to citronellal - catalyst mixture after reflux with pressure and flow H2 of 3 kPa, and the other method consists of a flow system to the citronellal -catalyst mixture at the temperature of 200o C with H2 flow pressure of 2 kPa. Reaction products were analyzed using GC-MS to determine the total conversion and product yield of menthol. The results showed that the different methods give different reaction mechanisms significantly. The first method gives almost to 99% conversion of citronellal with major products of isomenthone and isopulegol while the second method give the conversion of 5.18% with 0.39% selectivity to menthol products. Compared with natural montmorillonite, both processes showed higher conversion in which the conversion of citronellal over montmorillonite give the concersion less than 5%. The adequacy of H2 flow rate as a reactant is an important factor affection the mechanism is discussed in this paper.

Page 1 of 1 | Total Record : 7

Filter by Year

2013 2013

Filter By Issues

All Issue Vol 30, No 2 (2025) Vol 30, No 1 (2025) Vol 29, No 2 (2024) Vol 29, No 1 (2024) Vol 28, No 2 (2023) Vol 28, No 1 (2023) Vol 27, No 2 (2022) Vol 27, No 1 (2022) Vol 26, No 2 (2021) Vol 26, No 1 (2021) Vol 25, No 2 (2020) Vol 25, No 1 (2020) Vol 24, No 2: Oktober 2019 Vol 24, No 1: April 2019 Vol 23, No 1 (2018): April 2018 Vol 23, No 2: Oktober 2018 Vol 22, No 2: Oktober 2017 Vol 22, No 1: April 2017 Vol 21, No 2: Oktober 2016 Vol 21, No 1: April 2016 Vol 20, No 2: Oktober 2015 Vol 20, No 1: April 2015 Vol 19, No 2: Oktober 2014 Vol 19, No 1: April 2014 Vol 18, No 2: Oktober 2013 Vol 18, No 1: April 2013 Vol 17, No 1: April 2012 Vol 16, No 2: Oktober 2011 Vol 16, No 1: April 2011 Vol 15, No 2: Oktober 2010 Vol 15, No 1: April 2010 Vol 14, No 1: April 2009 Vol 13, No 1: April 2008 Vol 12, No 2: Oktober 2007 Vol 12, No 1: April 2007 Vol 11, No 1: April 2006 Vol 10, No 2: Oktober 2005 Vol 10, No 1: April 2005 Vol 9, No 1: April 2004 Vol 8, No 2: Oktober 2003 Vol 8, No 1: April 2003 Vol 7, No 2: Oktober 2002 Vol 7, No 1: April 2002 Vol 6, No 1: Saintek 2001 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email -

Phone -

Journal Mail Official -

Editorial Address -

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA