344 research outputs found
Osteoporosis and Its Impact on Oral and Dental Health
Get PDFShort Commentary titled "Osteoporosis and Its Impact on Oral and Dental Health" By Dr. Manisha Singh, Dr. Hemant Sawhney, Dr. Richa Mishra and Dr. Hemant Kumar 
Accessing Scholarly Information in Networked Environment through Institutional Repositories
Get PDFThe archival collection of libraries is increasingly-being
converted into digital format. Institutional Repositories are the result of such programmes which make available the archival collections over networks to its users. In addition, they also provide direct output of an institution or organization’s research contribution in digital format for quick access of the users
Active pitch control of an oscillating foil with biologically-inspired boundary layer feedback
Get PDFThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2010.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student submitted PDF version of thesis.Includes bibliographical references (p. 75-76).We present a high-fidelity numerical study of a two-dimensional °apping airfoil, ad- dressing the hypothesis that boundary layer feedback control can enable improved performance in flapping light. To this end, we model a novel biologically-inspired feedback controller which adjusts wing motion in response to the flow-induced bending load experienced by sensory hairs mounted on the wing. Such hairs have been observed on bats, and biological studies suggest that an associated feedback controller may play an important role in enabling bats' well-known mastery of light. The coupled °uid and structural equations of our model are solved numerically by a Discontinuous Galerkin finite element method, combined with an Arbitrary Lagrangian-Eulerian (ALE) formulation to account for airfoil motion. Feedback control is deed by a simple proportional-derivative (PD) control law relating hair sensor feedback to an applied torque at the pivot point of the wing. We also include a torsional spring at the pivot point to model passive aeroelasticity, following prior work by Israeli [5]. Our results show that hair sensors are well-suited for detecting flow separation, and sensors placed near the leading edge enable better light performance than sensors placed near the trailing edge. We compute a "performance envelope" for a purely passive flapping airfoil, and demonstrate that our active feedback controller enables improvements of up to 5% in propulsive efficiency. We also present gust alleviation experiments, where we find that an optimal PD controller reduces lift deviation by 33% compared to a spring-only airfoil. Mechanisms for these performance improvements are discussed. Our findings suggest that boundary layer feedback control may plausibly contribute to the outstanding °ight abilities of bats, and may also provide valuable clues for designing robust and maneuverable Micro Air Vehicles (MAVs).by Hemant Kumar Chaurasia.S.M
Study the subthreshold logic design
No full textMT, ECEDIn this report, an equivalent RC delay approach to study the subthreshold operation for
inverter, AND logic and OR logic circuits is presented. In these subthreshold circuits, the
supply voltage is below the threshold voltage of the device. The symmetric inverter is
designed for subthreshold current model, which is exponential in nature and is a more
accurate model which considers the effect of thermal energy on the Boltzmann
distribution of electron energies. Based on the inverter, the other static circuits and
domino circuits are designed and various bulk biasing schemes are used. Taking the effect
of miller capacitance, equivalent capacitance is calculated. The average resistance is also
calculated for each circuit and based on this, the 90% delay is calculated for each case.
The results of RC delay are compared with SPICE simulation in 32nm technology.
The results reveal the domino OR type 4 has least delay among all domino OR
circuits and AND type 1 has least delay among all domino AND circuits. This is due to
the fact that these circuits have least output capacitances. Comparison on the basis of
Power Delay Product (PDP) is also done for all the circuits in subthreshold regime.
Domino OR type 2 and domino AND type 2 are more efficient due to the lower value of
the power delay product
A Study on the Impact of Alcoholism on EEG-based Cryptographic Key Generation Systems
No full textAlcoholism is one of the brain disorders that involves in electroencephalogram (EEG) signals and have impact on EEG-based systems. However, this issue has not been investigated. In this paper, we propose an EEG-based cryptographic key generation system using EEG signals and present experiments performed on two groups of subjects, alcoholic and non-alcoholic groups in the Alcoholism database. This EEG-based cryptographic key generation system is based on an assumption that EEG signal is quasi-stationary if the time window is sufficiently short. With this assumption, stable EEG features are extracted to generate cryptographic keys. The impact of alcoholism on performance of the system is analysed based on our experimental results.</p
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Summaries
Get PDFSocial Costs and Economic Benefits of
Micro Irrigation Systems for Dry Land
Crops (D. Tata Rao); A Study on Agrosilvipastoral Farming
Systems for Optimising Forage and Energy
Resources in Rainfed Areas of
Bundelkhand Region of Uttar Pradesh.(M.M. Rajpoot, Archana Shukla, S.B. Saxena,Anshu Gupta and Vivek Kumar Chaurasia); Dynamics of Decadal Diversification and
Transformation of Dry Land Hill
Agriculture – A Case Study of Village
Kot, Hamirpur District, Himachal Pradesh (S.P. Saraswat, Prem Dahiya and Hemant Sharma); Role of Electricity Prices and Water
Rights in Making Groundwater Use in
Agriculture Sustainable: A Review (Nitin Bassi); Technological Diversification of Dryland Agriculture in Bundelkhand Region of Uttar Pradesh (R.R. Kushawaha, R.R. Verma, Heera Lal, Shanti Sachan and Anita Katiyar); Growth, Variability and Potential of Dryland Crops in India (Rakesh Singh, H.P .Singh and Vijaya Laxmi Pandey); Analysing the Instability in Agricultural Performance: A Region-wise Analysis of Gujarat (Jharna Pathak and Itishree Pattnaik); Assessment of Economic and Ecological Returns from Millet-based Bio-diverse Organic Farms vis-à-vis Conventional Farms (B. Suresh Reddy); Role of Institutional Support System in Drought Management: Evidence from Western Odisha (Mrutyunjay Swain); Economic Viability of Sprinkler Irrigation in Vegetable Production in Temperate High Hills of Himachal Pradesh (Virender Kumar, Harbans Lal, K.D Sharma and Suneel Thakur); Technological, Institutional, Infrastructural
and Policy Imperatives for Chickpea Production under Dryland Agriculture (Brahm Prakash and A.K. Sharma); Development of Dryland Agriculture: A Snap Shot of Agricultural Marketing Infrastructure (M.S. Jairath and P. Mallikharjuna Charyulu); Impact of Water Harvesting System
(Watershed) in Bundelkhand Region of Uttar Pradesh (Babu Singh, Birendra Kumar, Anjani Kumar Singh and Balwan Singh); Free Electricity for Agriculture and Its Implications for Farmers’ Well-Being, Farm- and Non-Farm Employment and Crop Productivity in Andhra Pradesh (Jin Kathrine Fosli and A. Amarender Reddy); Pearl Millet - Status in Dry Land Agriculture of India (Arjinder Kaur, Sukhjeet K. Saran and Parminder Kaur); Impact of Food Prices on Food Security: A Distribution-Sensitive Analysis for Rural Households of Rajasthan and Gujarat (Sumit Mahajan, Shiv Raj Singh and K.K. Datta); Impact of MGNREGS on Dry Land Agriculture in Karimnagar District of
Andhra Pradesh (D. Kumaraswamy and C.V. Hanumanthaiah); Sustainable Agricultural Development through Watershed Programme in Rainfed Areas: A Case Study in Coimbatore
District of Tamil Nadu (Subhash Chand, Alok K. Sikka, M. Madhu, D.V. Singh, V. Selvi, R. Ragupathy, P. Sundrambal and V.N. Sharda); Is Economics of Rainfed Crops Worsening than Irrigated Crops? An Exploratory Analysis from 1971-72 to 2009-10 (A. Narayanamoorthy,
P. Alli and R. Suresh); Supply Response Analysis of Major Pulse Crops in India (S.M. Vembu, T.K. Immanuelraj and M.B. Dastagiri)
Summaries
Get PDFSocial Costs and Economic Benefits of
Micro Irrigation Systems for Dry Land
Crops (D. Tata Rao); A Study on Agrosilvipastoral Farming
Systems for Optimising Forage and Energy
Resources in Rainfed Areas of
Bundelkhand Region of Uttar Pradesh.(M.M. Rajpoot, Archana Shukla, S.B. Saxena,Anshu Gupta and Vivek Kumar Chaurasia); Dynamics of Decadal Diversification and
Transformation of Dry Land Hill
Agriculture – A Case Study of Village
Kot, Hamirpur District, Himachal Pradesh (S.P. Saraswat, Prem Dahiya and Hemant Sharma); Role of Electricity Prices and Water
Rights in Making Groundwater Use in
Agriculture Sustainable: A Review (Nitin Bassi); Technological Diversification of Dryland Agriculture in Bundelkhand Region of Uttar Pradesh (R.R. Kushawaha, R.R. Verma, Heera Lal, Shanti Sachan and Anita Katiyar); Growth, Variability and Potential of Dryland Crops in India (Rakesh Singh, H.P .Singh and Vijaya Laxmi Pandey); Analysing the Instability in Agricultural Performance: A Region-wise Analysis of Gujarat (Jharna Pathak and Itishree Pattnaik); Assessment of Economic and Ecological Returns from Millet-based Bio-diverse Organic Farms vis-à-vis Conventional Farms (B. Suresh Reddy); Role of Institutional Support System in Drought Management: Evidence from Western Odisha (Mrutyunjay Swain); Economic Viability of Sprinkler Irrigation in Vegetable Production in Temperate High Hills of Himachal Pradesh (Virender Kumar, Harbans Lal, K.D Sharma and Suneel Thakur); Technological, Institutional, Infrastructural
and Policy Imperatives for Chickpea Production under Dryland Agriculture (Brahm Prakash and A.K. Sharma); Development of Dryland Agriculture: A Snap Shot of Agricultural Marketing Infrastructure (M.S. Jairath and P. Mallikharjuna Charyulu); Impact of Water Harvesting System
(Watershed) in Bundelkhand Region of Uttar Pradesh (Babu Singh, Birendra Kumar, Anjani Kumar Singh and Balwan Singh); Free Electricity for Agriculture and Its Implications for Farmers’ Well-Being, Farm- and Non-Farm Employment and Crop Productivity in Andhra Pradesh (Jin Kathrine Fosli and A. Amarender Reddy); Pearl Millet - Status in Dry Land Agriculture of India (Arjinder Kaur, Sukhjeet K. Saran and Parminder Kaur); Impact of Food Prices on Food Security: A Distribution-Sensitive Analysis for Rural Households of Rajasthan and Gujarat (Sumit Mahajan, Shiv Raj Singh and K.K. Datta); Impact of MGNREGS on Dry Land Agriculture in Karimnagar District of
Andhra Pradesh (D. Kumaraswamy and C.V. Hanumanthaiah); Sustainable Agricultural Development through Watershed Programme in Rainfed Areas: A Case Study in Coimbatore
District of Tamil Nadu (Subhash Chand, Alok K. Sikka, M. Madhu, D.V. Singh, V. Selvi, R. Ragupathy, P. Sundrambal and V.N. Sharda); Is Economics of Rainfed Crops Worsening than Irrigated Crops? An Exploratory Analysis from 1971-72 to 2009-10 (A. Narayanamoorthy,
P. Alli and R. Suresh); Supply Response Analysis of Major Pulse Crops in India (S.M. Vembu, T.K. Immanuelraj and M.B. Dastagiri)
Caste, Ethnicity and Exclusion in South Asia: The Role of Affirmative Action Policies in Building Inclusive Societies
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