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Ashok, V.
- Determination of Blood Glucose Concentration by Back Propagation Neural Network
Abstract Views :448 |
PDF Views:137
Authors
Affiliations
1 Dept. of BioMedical Engineering, Velalar College of Engineering, Erode-638009, IN
2 Dept. of Electrical and Electronic Engineering, Info Institute of Engineering, Coimbatore 641107
1 Dept. of BioMedical Engineering, Velalar College of Engineering, Erode-638009, IN
2 Dept. of Electrical and Electronic Engineering, Info Institute of Engineering, Coimbatore 641107
Source
Indian Journal of Science and Technology, Vol 3, No 8 (2010), Pagination: 916-918Abstract
This paper presents a supervised backpropagation neural (BPN) network for the determination of blood glucose in diabetic patients. Non- invasive measurement of blood glucose concentration based on reflected laser beam from the index finger has been reported in this paper. This method depends on Helium-Neon (He-Ne) gas laser operating at 632.8 nm wave length. During measurement the index finger is placed in the laser beam transceiver unit, the reflected optical signal is converted into its corresponding electrical signal and the obtained signal is processed by the neural network which presents the results in the form of blood glucose concentration. Diabetes database used for empirical comparisons and the results are shown that BPN network performs better.Keywords
Artificial Neural Network, Diabetes Mellitus, Non-invasive Measurement, Supervised LearningFull Text
References
- Rumelhart DE, Hinton GE and Williams RJ (1986) Learning representation by back propagating errors. Nature. 323, 533-536.
- Ashok V, Nirmalkumar A and Jeyashanthi N (2010a) A novel method for blood glucose measurement by noninvasive technique using laser. Int. J. Biol. Life Sci. 127–133.
- Ashok V, Balakumaran T, Gowrishankar C, Vennila I and Nirmalkumar A (2010b)“The fast Haar wavelet transform for signal and Image processing. Int. J. Comp. Sci. Inform. Security. 7(1), 126-130.
- Seshiah V, Balaji V, Madhurai R and Aruna S (2002) Diagnosis of Diabetes mellitus–rationale for glucose challenge. Antiseptic. 99, 272-274.
- Curry B and Morgan P (1997) Neural networks: a need for caution. Omega Int. J. Management Sci. 25,123-133.
- Predictive Reliability Assessment in the Power Distribution System
Abstract Views :213 |
PDF Views:0
Authors
Affiliations
1 Distribution Systems Division, Central Power Research Institute, Bangalore - 560 080, IN
1 Distribution Systems Division, Central Power Research Institute, Bangalore - 560 080, IN
Source
Power Research, Vol 9, No 3 (2013), Pagination: 335–342Abstract
The electrical utilities are facing market conditions and therefore have to plan and operate their distribution systems in a cost effective way. This implies that the customer’s requirement on reliability i.e. availability has to be balanced towards the cost for obtaining the same. An effective way to solving this issue is by the use of quantitative assessment of reliability, i.e. reliability indices, which is based on probability theory. However these methods require input data that defines the condition for the system and its components. is to predict the future behaviour based on collected data and measured performance.
The reliability assessment is normally used to evaluate performance of the distribution system network. The reliability of power Distribution system can be calculated by different reliability indices.This paper describes the reliability indices for two feeders of one is an industrial feeder and another one is an urban feeder. A software module (Reliability Assessment Module-RAM) has been used and the results of two practical distribution feeders are compared to benchmark the performance and operation of the power distribution system.
Keywords
Distribution System, Reliability Indices, Reliability Sassements Module
- Mission Design, Preflight and Flight Performance and Observations for Pad Abort Test
Abstract Views :216 |
PDF Views:86
Authors
Jayanta Dhaoya
1,
N. Remesh
1,
C. Ravikumar
1,
P. Bhanumathy
1,
A. K. Anilkumar
1,
Abhay Kumar
1,
V. Ashok
1
Affiliations
1 Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, IN
1 Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 120, No 1 (2021), Pagination: 89-95Abstract
Abort system is initiated to take the Crew Module (CM) away from the launch vehicle in case of an emergency at lift-off or at any point of time after launch for a mission with crew onboard. Crew Escape System (CES)-based abort is carried out from launch pad and during the atmospheric phase of ascent flight. The design and operation of CES play a crucial role in providing abort capability for escape from launch vehicle and return of the crew back to Earth during critical phase of ascent flight. CES motors are used to pull CM away from the launch vehicle during this mode of abort. Mission simulation and analysis is necessary for the design of CES-based abort mission and for its configuration. This article discusses the mission design, challenges faced during the design and strategies formulated towards the successful execution of Pad Abort Test.Keywords
Abort System, Flight Performance, Launch Vehicle, Mission Design.Full Text
References
- Hyle, C. T. et al., Abort Planning for Apollo mission. In AIAA 8th Aerospace Sciences Meeting, AIAA-70-0094, 1970.
- Davidson, J. et al., Crew exploration vehicle ascent abort overview, AIAA-2007-6590. In AIAA Guidance, Navigation and Control Conference, August 2007.
- Davidson, J. et al., Orion crew exploration vehicle launch abort system guidance and control analysis overview. In AIAA Guidance, Navigation and Control Conference, AIAA 2008-7148, August 2008.
- Dhaoya, N. et al., Mission design and trajectory simulation for CES. In Symposium on Applied Aerodynamics and Design of Aerospace Vehicle (SAROD 2015), 3–5 December 2015, Trivandrum, India, Paper id CP 89.
- Evolution of Crew Escape System Configuration
Abstract Views :222 |
PDF Views:100
Authors
Affiliations
1 Aeronautics Entity, Vikram Sarabhai Space Centre, Department of Space, ISRO Post, Thiruvananthapuram 695 022, IN
1 Aeronautics Entity, Vikram Sarabhai Space Centre, Department of Space, ISRO Post, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 120, No 1 (2021), Pagination: 96-104Abstract
The Crew Escape System (CES) is used for safe return of crew in case of any malfunctioning of a launch vehicle during ascent, specially in the atmospheric phase of flight. In the present case, as no active control is employed, the aerodynamic stability of CES is essential for safe return of crew in case of any emergency during ascent phase. While finalizing the shape of CES, besides stability, other aerodynamic parameters like acoustic, thermal, structural load, etc. need to be analysed. Based on detailed studies using CFD, a conical-shaped CES has been finalized. This article discusses the challenges involved in aerodynamic shaping of CES and different parameters studied while finalizing the configuration.Keywords
Aerodynamic Coefficients, Crew Escape System, Launch Vehicle, Static Margin, Stability.Full Text
References
- McCarthy, J. F., Ian Dodds, J. and Crowder, R. S., Development of the Apollo Launch Escape System. J. Space Craft, 1968, 5(8), 927– 932.
- Ashok, V. and Babu, T. C., Parallisation of Navier–Stoke code on a cluster of workstations. In Proceedings of the 6th International High Performance Computing Conference. Lecture Series in Computer Science, Springer Verlag, 1999.
- Balu, R., Babu, T. C., Ashok, V., Pradeep Kumar and Das, D., Development of low cost parallel computing platform for CFD applications. In Third AeSI Annual CFD Symposium, 11–12 August 2002.
- Sreenivasulu, J. et al., CFD analysis of a Launch vehicle with reverse flow nozzles – a validation study. Int. J. Aerospace Innov., 2013, 5(1).
- Sreenivasulu, J. et al., CFD analysis over a rocket configuration with and without canard. In 12th Annual CED Symposium, Bangalore, 11–12 August 2010.
- Aftosmis, M. J. and Rogers, S. E., Effects of jet-interaction on pitch control of a launch abort vehicle. AIAA Paper 2008-1281.
- Sreenivasulu, J. et al., Flow field analysis over a typical rocket with and without jet. In 10th Asian Symposium on Visualization, SRM University, Chennai, India, 1–5 March 2010.
- Sreenivasulu, J. et al., Aerodynamic analysis of a rocket configuration with grid fin. In Proceedings of the 37th National and 4th International Conference on Fluid Mechanics and Fluid Power, IIT Madras, Chennai, India, 16–18 December 2010.