IPTEK Journal of Proceedings Series
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Automatic Detection of Proliferative Diabetic Retinopathy With Hybrid Feature Extraction Based on Scale Space Analysis and Tracking
Get PDFFeature extraction is a process to obtain the characteristics or features of an object where the value of the features will be used for analysis in the next process. In retinal image, extraction of blood vessels’ characteristics can be used for detection of proliferative diabetic retinopathy (PDR). Retinal blood vessels’ features can be obtained directly with segmented image and with additional spatial method. For PDR detection, we need the suitable method that can produce maximum feature representation. This paper proposed hybrid feature extraction using a scale space analysis method and tracking with Bayesian probability. The result of the retinal images classification from STARE database using soft threshold m-Mediods classifier shows the best accuracy of 98.1%
Abstract of Keynote Speaker : Science and Technology of Light: Recent Developments and Future Directions
No full textThese last decades, optical telecommunications have made a spectacular success thanks to the explosion of Internet. This development is the fruit of a main effort of research and development in the field of guided optics which led to the improvement of the performances of optical fibers and optoelectronic components able to generate, detect, modulate or commutate light. Consequently, optoelectronic components of any kind at low cost become available in the market pushing the emergence of other applications in various fields. As a matter of fact, today the use of optics includes strategic fields like space and military ones and also fields of everyday life like data storage (CD and DVD), medicine and unsuspected sectors such as car industry. In a competing way, the advent of Nano-Photonics is pushing the limits of photonic devices miniaturization on scales lower than the wavelength. The interest of using the photon rather than the electron comes from the very high optical frequencies of the optical signal which allow a very broad band-width and offer an unequalled data transmission capacity. Ultimately, the 20th century was the century of electronics and the 21st century is expected to be that of photonics. This presentation will give a highlight of the main concepts and the recent development of photonics technology as well as future challange
Silica-Coated Mesoporous Carbon as Solid Dessicant in Gas Dehydration Process
Get PDFDehydration process using solid desiccant is required to reduce water content to meet pipeline gas GPSA specification (4-7 lb/MMscf). Porous silica gel has a high specific surface area (Grade 12 brand Davisil 800 m2/g), which is generally obtained via a high-cost supercritical technology. This research aims to substitute that of high-cost super critical technology by developing silica-coated mesoporous carbon. This research uses an impregnating-silica method consisting of pretreatment and hydrophilication processes. Here we found that the pretreatment process can increase the surface area of mesoporous carbon from 504.122 m²/g to 823.5 m²/g. While for the hydrophylication process, silica-coated mesoporous carbon was obtained via mechanical and chemical force. Silica-coated mesoporous carbon has adsorption capacity 70.59% of commercial silica gel
Design of Tracking System and Disturbance Rejection using Neural Networks for Autonomous Underwater Vehicle (AUV)
Get PDFAutonomous Underwater Vehicle (AUV) is under-actuated system with highly nonlinear dynamic and Multi Input Multi Output (MIMO). AUV has stability problem due to external disturbance. These characteristics cause the AUV is difficult to be controlled and to track the reference signal automatically. Based on these problems, this paper present tracking control design and disturbance rejection using Neural Networks for AUV with 6 Degree of Freedom (DOF). The proposed control system is used to generate control signals to overcome the nonlinear dynamics of AUV. The reference signal is processed using Line of Sight (LOS) method to obtain the desired yaw of AUV. Simulation results show that the AUV is able to track the reference signal even in the presence of ocean current disturbance
Waste Transportation System Optimization on Azzahara Material Recovery Facility (MRF) Bengkulu City
Get PDFBengkulu city as the capital city of Bengkulu province, in 2013 had a population of 334.529 inhabitants, with waste generated at 10,003.59 m3 / day. Coverage of waste management services in the city of Bengkulu has recently reached 33.01% or 331.29 m3 / day of the total waste. The effectiveness and efficiency waste transport system will increase the amount of waste transported and more communities are underserved. This research aims to improve the coverage of waste service by waste transportation system optimization. Analysis of optimization solid waste transportation system implemented by creating a network problem model and linear programming problem, generate the decision of how many trip of each conveyance and obtain maximum volume of waste transporte
A Review on User Perception of Desktop and Mobile Service Website Using Webqual and User Experience Approach
Get PDFAs the online media dissemination, website has the advantages that it can be accessed freely, without limits, wherever, whoever, and whenever. However, the advantages of the website is sometimes not in line with its simplicity. So it becomes important that the organization can make an assessment of the quality of the website that they are used, whether its website has fulfilled what is perceived by the user. This paper reviews studies user perception of desktop and mobile service website used qualitative methods adapted to WebQual and User Experience approach. The expected outcome of this research is knowing the user's perception of the services and information available on the website along with the possibility of desktop and mobile gap arising from differences in the two services
Stability Control Design of Sigma Class Ship Firing Mode using Fuzzy Gain Scheduling-PID
Get PDFSigma class ship of Hasanuddin 366 is one of Indonesian battle ship. When the ship operates, shipwreck can be happened because impact force disturbance can increase the angle of yaw and roll. In this research, the system of rudder roll stabilization is designed to keep the ship heading/yaw and decrease the roll angle using ship nonlinear dynamic model of 4 degree of freedom (DOF) that contains surge, sway, yaw, and roll. Fuzzy gain scheduling–PID (FGS-PID) controller is used to control rudder angle as the steering control. The value of the cannon impact force disturbance is 1062.525 Newton with angle variation of 30o from the direction of ship surge. The FGS-PID controller is compared with the PID Ziegler Nichols (PID-ZN) controller as reliability test. According to simulation result, the FGS-PID controller is better than PID-ZN in keeping the heading and decreasing the roll. The performance of FGS-PID controller with heading input of 20o and 30o is compatible with the stability parameter of IMO (International Maritime Organization)
Performance Test of Double Crossed Membrane Contactor for Simultaneous Absorption-Desorption Of CO2 Using Diethanolamine
Get PDFThis study aimed to test the performance of polypropylene hollow fiber that were configured in the double crosses configuration as membrane contactor by combining absorption-desorption process simultaneously in one module using diethanolamine as solvent which is expected to separate CO2 optimally by using of minimal solvents. The solvent allowed to stand in the shell module, feed gas supplied to the lumen of the first tube, and sweep gas flowed into the lumen of the second tube of membrane module. The experimental results showed that during the first three hours, the flux of absorption decreased until 2.63x10-5 mol/m2.s and the efficiency of absorption decreased to 5.181%, whereas flux of desorption increased every hour until 6.202x10-5 mol/m2.s during performance test, while the efficiency of desorption rose to 92.437%