Performance Evaluation of Image Enhancement Techniques

Shruti Puniani,Sankalap Arora 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.8

Color Image enhancement is a process in which the perceptual information of an image is improved to obtain more information and details contained in the image. It improves the subjective quality of an image by working with original data. This paper focuses on evaluating the performance of various image enhancement techniques. These techniques are either based on histogram modification or are based on fuzzy logic. The techniques are compared using two quantitative measures namely; Contrast Improvement index (CII) and Tenengrad measure. The results have shown that Lab and edge preservation based fuzzy image enhancement (LEFM) yields the best results.

Electrochemical Sensing of Cd(II) Ions Using Polypyrrole hybrid with meso-tetra(4-carboxyphenyl)porphyrin

Shruti Peshoria,Anudeep Kumar Narula 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.2

An empirical investigation of the twin deficit hypothesis: Panel evidence from selected Asian economies

( Shruti Shastri ),( A. K. Giri ),( Geetilaxmi Mohapatra ) 한양대학교 경제연구소 2017 JOURNAL OF ECONOMIC RESEARCH Vol.22 No.2

The paper examines the twin deficit hypothesis for a panel of eight South Asian and South East Asian economies having a history of persistent deficits on both fiscal and current accounts for the peri-od 1985-2014. The results based on first and second generation pan-el cointegration tests indicate existence of a long-run relationship among budget balance, interest rate, exchange rate and current ac-count balance. The estimates of long run coefficients obtained from common correlated effects mean group indicate a positive relation-ship between the two balances, the impact of the budget balance on the current account being stronger. Dumitrescu-Hurlin panel cau-sality and block exogeniety tests suggest a feedback relationship between the two balances. The conventional hypothesis of causation running from budget balance to interest rates, to exchange rates and then to current account balance is however not borne out by the results.

An empirical investigation of the twin deficit hypothesis: Panel evidence from selected Asian economies

Shruti Shastri,A K Giri,Geetilaxmi Mohapatra 한양대학교 경제연구소 2017 JOURNAL OF ECONOMIC RESEARCH Vol.22 No.1

The paper examines the twin deficit hypothesis for a panel of eight South Asian and South East Asian economies having a history of persistent deficits on both fiscal and current accounts for the period 1985-2014. The results based on first and second generation panel cointegration tests indicate existence of a long-run relationship among budget balance, interest rate, exchange rate and current account balance. The estimates of long run coefficients obtained from common correlated effects mean group indicate a positive relationship between the two balances, the impact of the budget balance on the current account being stronger. Dumitrescu-Hurlin panel causality and block exogeniety tests suggest a feedback relationship between the two balances. The conventional hypothesis of causation running from budget balance to interest rates, to exchange rates and then to current account balance is however not borne out by the results.

Resident Participation in International Surgical Missions is Predictive of Future Volunteerism in Practice

Shruti Chudasama Tannan,Thomas J Gampper 대한성형외과학회 2015 Archives of Plastic Surgery Vol.42 No.2

Background Interest in global health and international mission trips among medical student and resident trainees is growing rapidly. How these electives and international mission experiences affect future practice is still being elucidated. No study has identified if participation in international surgical missions during residency is a predictor of participation in international surgical missions in practice after training completion. Methods All trainees of our plastic surgery residency program from 1990 to 2011, during the implementation of optional annual international surgical missions, were surveyed to determine if the graduate had gone on a mission as a resident and as a plastic surgeon. Data were compared between graduates who participated in missions as residents and graduates who did not, from 1990 to 2011 and 1990 to 2007. Results Of Plastic Surgery graduates from 1990 to 2011 who participated in international missions as residents, 60% participated in missions when in practice, versus 5.9% of graduates participating in missions in practice but not residency (P<0.0001). When excluding last 5 years, graduates participating in international missions in practice after doing so as residents increases to 85.7%, versus 7.41% who participate in practice but not residency P<0.002. Conclusions Results reveal plastic surgeons who participate in international surgical missions as residents participate in international surgical missions in practice at higher rates than graduates who did not participate in missions during residency. International missions have significant intrinsic value both to trainee and international communities served, and this opportunity should be readily and easily accessible to all plastic surgery residents nationwide.

Mechanical and Dynamic Mechanical Studies on Epoxy-Cobaltous Sulfate Polymer Hybrids

Shruti S. Devangamath,Blaise Lobo,Saraswati P. Masti,Shivayogi Narasagoudr 한국섬유공학회 2018 Fibers and polymers Vol.19 No.7

Cobaltous sulfate heptahydrate (CoSO4·7H2O) was incorporated as filler into diglycidyl ether of bisphenol A (DGEBA) based epoxy resin system, to prepare organic-inorganic polymer hybrid materials. Mechanical tensile studies and dynamic mechanical analysis (DMA) were carried out in order to study the static and dynamic mechanical properties of the prepared hybrid films. Mechanical tensile studies were carried out at room temperature, at a test speed of 30 mm/min. Highest tensile strength of 24.74±2.42 MPa was achieved for 4.44 wt% filler level (FL), along with an increase in the value of Young’s modulus. Storage modulus (E'), loss modulus (E''), damping factor (tan δ) were obtained by DMA studies. Glass transition temperature (Tg) was obtained for pure epoxy and filled epoxy, for various FLs varying from 0.28 wt% to 5.00 wt%. Pure epoxy showed highest Tg value compared to filled epoxy hybrids. Highest storage modulus of 9.5 GPa was obtained for 2.22 wt% FL, which also showed highest loss modulus peak. Parameters like effectiveness coefficient (C) and crosslink density were calculated from the storage modulus data. Loss modulus and tan δ curves were analyzed to study the energy dissipation properties of prepared hybrid films. Activation energy (Ea) value for glass transition was obtained from damping factor (tan δ), which showed highest Ea value of 630.5 kJmol-1, for 4.44 wt% FL. DMA studies for various FLs were carried out at different test frequencies in order to study the changes in dynamic mechanical properties of the prepared hybrid materials with respect to frequency.

Formulation, optimization and evaluation of microemulsion based gel of Butenafine Hydrochloride for topical delivery by using simplex lattice mixture design

Shruti Rao,Tularam Barot,K. S. Rajesh,Lalit Lata Jha 한국약제학회 2016 Journal of Pharmaceutical Investigation Vol.46 No.1

The aim of the present investigation was to develop and evaluate Butenafine Hydrochloride loaded microemulsion based gel for treatment of fungal infection. Pseudo ternary phase diagrams were constructed for different microemulsion formulations composed of Capmul MCM as oil, Cremophor RH 40 as surfactant and Transcutol HP as co-surfactant. Composition of microemulsion system was optimized using simplex lattice mixture design including the concentration of oil, Surfactant co-surfactant ratio (Smix) and water (independent variables) and the % transmittance and globule size of microemulsion (response variables). The physicochemical properties of the optimized microemulsion were investigated. Microemulsion was incorporated into 1 % carbopol 934P gel and the ex vivo drug permeation of gel was also investigated. The results showed that the optimized microemulsion formulation was composed of Capmul MCM oil (5 %, w/w), Cremophor RH 40/Transcutol HP (43.333 %, w/w) and water (51.667 %, w/w). The mean globule diameter was 108.8 nm. The conclusion was that the release controlling ability of microemulsion containing gel formulation was significantly improved in comparison to commercial cream. Skin irritation study was also performed and it shows no irritation on rat skin after 24 h of application. Microbiological assay of Butenafine Hydrochloride was performed where it shows better zone of inhibition than marketed formulation.

Entrepreneurial Orientation and Organizational Performance: The Mediating Role of Knowledge Capabilities

Shruti Batra 강원대학교 경영연구소 2015 Asia-Pacific Journal of Business Vol.6 No.1

In this study, we identified the various mechanisms through which entrepreneurial orientation impacts firm performance. We proposed that entrepreneurial orientation assists organizations in building cultural, structural, human and technical knowledge capabilities, which in turn lead to sustainable competitive advantage. We tested our proposed hypothesis using data collected from 76 managers of small entrepreneurial firms. We found that cultural knowledge capabilities are the strongest mediators of entrepreneurial orientation and firm performance relationship. By bringing in knowledge capabilities in the literature of entrepreneurial orientation, we open new directions for research. Our findings have implications for theory as well as practice.

Fabrication of Portable Sensors and Biomass Originated Materials for Their Biocontrol Strategies in Food and Human Welfare

Shruti Shukla,Vivek K. Bajpai,Myunghee Kim,Yun Suk Huh,Young-Kyu Han 한국식품영양과학회 2019 한국식품영양과학회 학술대회발표집 Vol.2019 No.10

Estimation of wind pressure coefficients on multi-building configurations using data-driven approach

Shruti Konka,Shanbhag Rahul Govindray,Sabareesh Geetha Rajasekharan,Paturu Neelakanteswara Rao 한국풍공학회 2021 Wind and Structures, An International Journal (WAS Vol.32 No.2

Wind load acting on a standalone structure is different from that acting on a similar structure which is surrounded by other structures in close proximity. The presence of other structures in the surrounding can change the wind flow regime around the principal structure and thus causing variation in wind loads compared to a standalone case. This variation on wind loads termed as interference effect depends on several factors like terrain category, geometry of the structure, orientation, wind incident angle, interfering distances etc., In the present study, a three building configuration is considered and the mean pressure coefficients on each face of principle building are determined in presence of two interfering buildings. Generally, wind loads on interfering buildings are determined from wind tunnel experiments. Computational fluid dynamic studies are being increasingly used to determine the wind loads recently. Whereas, wind tunnel tests are very expensive, the CFD simulation requires high computational cost and time. In this scenario, Artificial Neural Network (ANN) technique and Support Vector Regression (SVR) can be explored as alternative tools to study wind loads on structures. The present study uses these data-driven approaches to predict mean pressure coefficients on each face of principle building. Three typical arrangements of three building configuration viz. L shape, V shape and mirror of L shape arrangement are considered with varying interfering distances and wind incidence angles. Mean pressure coefficients (Cp mean) are predicted for 45 degrees wind incidence angle through ANN and SVR. Further, the critical faces of principal building, critical interfering distances and building arrangement which are more prone to wind loads are identified through this study. Among three types of building arrangements considered, a maximum of 3.9 times reduction in Cp mean values are noticed under Case B (V shape) building arrangement with 2.5B interfering distance. Effect of interfering distance and building arrangement on suction pressure on building faces has also been studied. Accordingly, Case C (mirror of L shape) building arrangement at a wind angle of 45º shows less suction pressure. Through this study, it was also observed that the increase of interfering distance may increase the suction pressure for all the cases of building configurations considered.