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Search Results: 1 - 10 of 966 matches for " Sarita Kumari "
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A Wavelet Based Approach for Compression of Color Images
Sarita Kumari
International Journal of Modern Education and Computer Science , 2013,
Abstract: The use of color in image analysis and compression is becoming more and more popular. The high quality color images are in demand, but the bandwidth and power resources are limited, this shows the requirement of effective color image compression algorithm which is suitable to human visual system. However most of the existing algorithms are designed for gray scale visual information. In this work a unique wavelet based approach is proposed for compression of color images. Wavelet families are used to characterize the quality of image by calculating quality estimation parameters, which are, peak signal to noise ratio, energy retained, entropy and redundancy. The entropy calculations are done using color histogram and coding programme is developed for estimation of PSNR, ER and redundancy of the compressed image. The results are analyzed and a set of criteria is determined for the acceptability of coding algorithm. Results show that Biorthogonal wavelet filter outperforms the orthogonal one in quality of compressed image but the orthogonal filter is more energy preserving.
Mid Trimester Transvaginal Ultrasound Assessment of Cervix for Prediction of Primary Caesarean Section  [PDF]
Mamta Rath Datta, Shikha Parashar, Priyanka Mukherjee, Sarita Kumari, Ankush Nandkishor Raut
Open Journal of Obstetrics and Gynecology (OJOG) , 2015, DOI: 10.4236/ojog.2015.515121
Abstract: Objectives: To assess the role of mid-trimester transvaginal sonographic assessment of cervix in predicting the risk of primary cesarean section. Methods: Hundred pregnant women, who attended out-patient department of Tata Main Hospital for ante natal examination, from 1st December 2011 to 1st December 2012, were taken up for the study. Only those who had confirmed dates were included in the study. Transvaginal sonography was done at 18 - 26 week to measure cervical length. Parameters studied were gestational age at delivery, whether spontaneous or induced, duration of labor, pregnancy outcome and mode of delivery and indication for cesarean section. Results: Majority of LSCS were in the group with cervical length ≥4 cm (57.1%) with “p” value of <0.0001. Only 13.8% women who had vaginal delivery had cervical length ≥4 cm. Out of the 32 women with cervical length ≥4 cm, 26 (81.3%) required induction of labor and 10 (31.3%) delivered after 40 weeks. Mean cervical length for spontaneous onset of labor was 3.11 ± 0.85 cm and for induction of labor was 4.36 ± 1.11 cm (“p” value ≤ 0.001). Multiple logistic regression analysis was performed to study outcome variable of mode of delivery. Cervical length and induction to delivery interval were found to be independent predictor of mode of delivery. In the receiver operating characteristic (ROC) curve analysis, the best cut-off point for prediction of primary cesarean section was 40 mm for cervical length. Sensitivity, specificity, positive predictive value and negative predictive value of cervical length as a predictor of mode of delivery was 54.8%, 91.4%, 82.1% and 73.6% respectively. R2 (coefficient of determination) was 0.271. Conclusion: Transvaginal cervical length measurement at mid trimester can be used as a predictive tool to determine the risk of primary cesarean section as well as the need of induction of labor.
Soybean Growth-promotion by Pseudomonas sp. Strain VS1 under Salt Stress
Amrita Kasotia,Shekhar Jain,Anukool Vaishnav,Sarita Kumari
Pakistan Journal of Biological Sciences , 2012,
Abstract: In the present study, we employ Pseudomonas sp. strain VS1 showed in vitro plant growth-promotion characteristics and promoted soybean seed emergence under salt stress. Strain produced indole 3-acetic acid in the presence of salt stresses that exhibited high numbers of lateral root as compared to control. Bacterial strain exhibited growth in DF salt medium amended with 1-aminocyclopropane-1-carboxylate through ACC deaminase activity. Bacterial-treated soybean seeds were subjected to salt stress and significantly enhanced emergence at 7 days after seeding. Strain untreated soybean plants had a 33% seed germination when 200 mM NaCl was applied at 0 DAS and the root length was significantly decreased compared to the strain treated plants (LSD0.05 = 0.21). Most importantly, the application of 200 mM NaCl at 0 DAS resulted in only a 9% of lateral root in untreated plants as compared to strain treated plants.
Relative Equilibria of a Satellite Moving in an Elliptic Orbit Subjected to Gravitational and Aerodynamic Torques  [PDF]
Kumari Ranjana
International Journal of Astronomy and Astrophysics (IJAA) , 2014, DOI: 10.4236/ijaa.2014.41019
Abstract: Here we consider the attitude motion of a satellite, subjected to gravitational and aerodynamic torques in an elliptic orbit. The determination of orientation of equilibrium points has been discussed. It is found that they coincide with those for the circular case as studied by Sarychev and others in the works [1]-[3] and besides we have aimed at the sufficient condition for stability in the sense of Lyapunov.
Studies on the Biology and Predatory Potential of Harmonia dimidiata, a Major Predator of Aphis pomi De Geer on Apple Host in India  [PDF]
Meena Kumari
Advances in Entomology (AE) , 2018, DOI: 10.4236/ae.2018.62013
Abstract: Observations were made on young nursery plants and apple orchards to record the coccinellid predators of Aphis pomi De Geer on apple plants in Himachal Pradesh which is main apple growing state of India. Nine species of lady bird beetles were observed feeding on green apple aphid, Aphis pomi De Geer on the apple nursery plants of Mashobra locality of Shimla district and Ner Chowk locality of Mandi district of Himachal Pradesh, India. On the basis of general observations, it was found that the larvae of beetle Harmonia dimidiata (F.), are very active to feed on the nymphs of green apple aphid. Therefore, it was considered worthwhile to investigate the biology and feeding potential of this beetle on green apple aphid from biological control point of view.
An animal cell culture: Advance technology for modern research  [PDF]
Rajeev Nema, Sarita Khare
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.33030
Abstract: At the present time animal cell culture is more significant and multifarious application tool for current research streams. A lot of field assorted from animal cell culture such: stem cell biology, IVF technology, cancer cell biology, monoclonal antibody production, recombinant protein production, gene therapy, vaccine manufacturing, novel drug selection and improvement. In this review conclude animal cell culture as well as its requirements
Change in Entropy of Spinning Black Holes Due to Corresponding Change in Mass in AGN  [PDF]
Anuradha Kumari, Supriya Kumari, Dipo Mahto
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.68144
Abstract: The present paper discusses the change in entropy of spinning black holes due to change in mass for AGN black holes on the basis of the model as proposed in the case of XRBs under condition that the black holes spin with unit spinning parameter and angular momentum and this model gives slightly some different nature of the super-massive spinning black holes in AGN as specified for XRBs.
Understanding the Mechanism of Gamete Release in Sargassum vulgare C. Agardh  [PDF]
Inderdeep Kaur, Reeta Kumari
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.39153
Abstract: Sargassum vulgare C. Agardh shows androgynous receptacles, each bearing on an average 12 unisexual conceptacles which open outside by ostiole, and wherein gametangia (antheridia or oogonia) lie interspersed with paraphyses. Since out-put of eggs is extremely low, 4 - 6 per female conceptacle, Sargassum sp. ensures its survival under all eco-physiological conditions. The released oogonium is “wrapped” in sulphated polysaccharide-rich wall layer known to provide protection against desiccation. Oogonia after being “extruded” out of ostiole, are “incubated” on receptacle, where they grow into eggs that are easily contacted by spermatozoids. Gamete release is synchronous and almost simultaneous ensuring high rates of fertilization. The release occurs on days falling near a full moon or new moon, during low tides when conceptacles lie exposed. Gamete release occurs first from upper conceptacles, which “house” mature gametangia while lower ones are still developing. This results in gamete release over an extended period of time. The zygote dispersal and propagule recruitment also show adaptations selectively advantageous for the alga.
On the Artificial Equilibrium Points in a Generalized Restricted Problem of Three Bodies  [PDF]
Kumari Ranjana, Vijay Kumar
International Journal of Astronomy and Astrophysics (IJAA) , 2013, DOI: 10.4236/ijaa.2013.34059
Abstract:

The present article studies the stability conditions of central control artificial equilibrium generalized restricted problem of three bodies. It is generalized in the sense that here we have taken the larger primary body to be in shape of an oblate spheroid. The equilibrium points are sought by the application of the propellant for which it would just balance the gravitational forces. The launching flight of such a satellite is seen to be applicable for having arbitrary space stations for these different missions. Specialty of the result of the investigation lies in the fact that an arbitrary space station can be formed to attain any specified mission.

Structure and Dielectric Relaxation Behaviour of [Pb0.94Sr0.06][(Mn1/3Sb2/3)0.05 (Zr0.49Ti0.51)0.95]O3 Ceramics  [PDF]
Kumar Brajesh, Kiran Kumari
World Journal of Condensed Matter Physics (WJCMP) , 2015, DOI: 10.4236/wjcmp.2015.53022
Abstract: The field dependences of the dielectric response and conductivity are measured in a frequency range from 100 Hz to 1 MHz and in a temperature range from 300 K to about 775 K. The dielectric measurements (real and imaginary parts) of this composition with temperature (300 K - 775 K) at different frequencies (100 Hz - 1 MHz) unambiguously point towards relaxor behaviour of the material. The real part of the dielectric constant is found to decrease with increasing frequency at different temperatures while the position of dielectric loss peak shifts to higher frequencies with increasing temperature indicating a strong dispersion beyond the transition temperature, a feature known for relaxational systems such as dipole glasses. The frequency dependence of the loss peak obeys an Arrhenius law with activation energy of 0.15 eV. The distribution of relaxation times is confirmed by Cole-Cole plots as well as the scaling behavior of the imaginary part of the electric modulus. The frequency-dependent electrical data are also analyzed in the framework of the conductivity and modulus formalisms. Both these formalisms yield qualitative similarities in the relaxation times. The Rietveld analysis conforms that the materials exhibits tetragonal structure. The SEM photographs of the sintered specimens present the homogenous structures and well-grown grains with a sharp grain boundary.
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