IPTEK Journal of Proceedings Series
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Calculation Method to Analize The Concordance Between Supply and Demand of Bus Public Transport For Morning Commuter Trip at Gubeng Station
Get PDFSurabaya is the center of activity for the province of East Java and eastern Indonesia. Commuting to Surabaya is very high. Thus, the concordance between supply and demand of public transport for commuter trip must be evaluated. For this purpose a calculation method has to be developed. The research objective has been achieved. The method calculation based on special matrix technics for overlay calculation
The Influence of Product and Facade Design towards Its Selling Price
Get PDFPricing become one of determinant variable of consumer preferences to product and design of a house. When the selling price of a house is highest than the buying power of consumer, then the number of its demand was go down. Conversely, when the selling price of house could reachable by consumer buying power, then the number of its demand increased. This research is the preliminary research from advanced research to investigate the marginal pricing of Perumahan Pondok Indah Matani. By literature reviews and cost calculation methods, it is found that there were three (3) aspect of product and facade design of house that influences to the selling price, namely cost of spouse and plastering walls, cost of door sills and windows; and wall-painting cost
Study of The Correlation Between Contact Angle Values with The Polarity of Liquids
Get PDFContact angle measurement is a technique which can be used to determine the surface properties of a substance and observe the interaction of surfaces. When polar liquid dropped on a non-polar solid, it will make an interaction that can observed from the contact angle. In simple way, the different polarity of the solid and the liquid sample will affect to the contact angle obtained. In this work the value of contact angle will be correlated to the polarity of the sample. The results showed that the plot between polarity parameter with contact angle on polytetrafluoroethylene substrat has a correlation which formed a sigmoidal curve with R2=0,954. It means the polarity of liquids can be determined by the contact angle values
A Hybrid Approach Support Vector Machine (SVM) – Neuro Fuzzy For Fast Data Classification
Get PDFIn recent decade, support vector machine (SVM) was a machine learning method that widely used in several application domains. It was due to SVM has a good performance for solving data classification problems, particularly in non-linear case. Nevertheless, several studies indicated that SVM still has some inadequacies, especially the high time complexity in testing phase that is caused by increasing the number of support vector for high dimensional data. To address this problem, we propose a hybrid approach SVM – Neuro Fuzzy (SVMNF), which neuro fuzzy here is used to avoid influence of support vector in testing phase of SVM. Moreover, our approach is also equipped with a feature selection that can reduce data attributes in testing phase, so that it can improve the effectiveness of time computation. Based on our evaluation in real benchmark datasets, our approach outperformed SVM in testing phase for solving data classification problems without significantly affecting the accuracy of SVM
Analysis of The Dynamic Stability Positioning Control System of Semisubmersible
Get PDFThe semisubmersible offshore dynamics depend on the condition of the ocean environments. Disruption of forces and moments in the floating structure caused by environment factors, there are wind, waves and ocean currents. This disturbances will cause decreased stability of the structure. This situation will disrupt the process of oil and gas exploration. Currently exploration activities is success if the structure in the static condition and remain on. This condition needs a force or torque to counter the disruption caused by the environment. This paper proposes a control system and analyze the performance of response stability of dynamic positioning system (DPS). DPS will control in 3 Degree of Freedom (DOF) variables, there are: sway, roll and yaw. The structure of the DPS consists of controllers, sensors, actuators. Actuators are Thruster System and Power System. The strategic to maintain in DPS is Linear Quadratic (LQG) control. This method is one of optimal control which capable rejected wave interference. Some values control parameters, that are Q and R in the cost function, show the robustness of DPS
QM/MM dynamics of Proton Transport in Chitosan/Phosphotungstic Acid Composite Membrane for Direct Methanol Fuel Cell
Get PDFThe aim of this research is to study proton transport in DMFC using chitosan/phosphotungstic acid (CS/PWA) composite membrane as Proton Exchange Membrane (PEM). Model of proton transport mechanism was proposed in order to investigate the proton transport rationality in CSPWA composite membrane, which is indicated by energy models. QM/MM dynamics method on the basis of CP2K code was used to calculate energy of the models. Results showed that the model of proton transport mechanism produced energy gradient. Interaction model of proton (H+ ion) and CS/PWA hydrated membrane has minimum QM/MM energy than the other models. The value of QM/MM energy of H+-CS/PWA hydrated is -312.717135970308 a.
Spatial Modelling of Religious Tourism Development Strategy with Special Reference of Aer Mata Cemetery Bangkalan Madura, Indonesia
Get PDFThe development of tourism in Indonesia can be classified based on the type of tourism attraction preferred. Bangkalan Regency determine religious tourism as a major tourism destination. This is as affected by the existence of a number of historical relics which are related to the spread of Islam on Madura Island. , It also asserts this Cemetery as urban heritage that must be protected in Bangkalan. This study explores Cemetery Aer Mata, this religious tourism destination layout has not been arranged properly. For this reason, formulation of the zone mapping in the area is needed, in order to be developed as tourism destination that contains a historical value and consistent with regional policy for conservation. An spatial modeling can be develop as tourism strategy by using cognitive mapping techniques.
Simulation of Generalized Space-Time Autoregressive with Exogenous Variables Model with X Variable of Type Metric
Get PDFOne of the models time series which also involves spatial aspects (spatio-temporal) is Generalized Space Time Autoregressive (GSTAR). Until now, GSTAR modelling don’t involve metric-type, which is called GSTARX. Parameter estimation for spatio temporal modeling is still limited by using Ordinary Least Square (OLS) which is less efficient because the residuals are correlated. Generalized Least Square (GLS) is one of the alternative methods for parameter estimation residuals are correlated. In this study would like to looking at the efficiency of GLS estimation method is compared with OLS to correlated data in GSTARX model. Simulation results show that the estimation GLS method is more efficient than using OLS if residual correlated