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Search Results: 1 - 10 of 2730 matches for " Praveen Pandey "
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Investigation of Shock Waves in Non-Ideal Gas under the Action of Magnetic Field  [PDF]
Kanti Pandey, Praveen Prakash Pathak
Advances in Pure Mathematics (APM) , 2017, DOI: 10.4236/apm.2017.710035
Abstract: In present paper, certain aspect of shock wave in non-ideal gas, when magnetic field is orthogonal to the trajectories of the gas particles and electrical conductivity is taken to be infinite, is investigated. Considering one-dimensional unsteady non-planer motion, basic equations, its general solution and formation of shock-wave, conservation laws and jumps conditions, variation of area of non-uniform cross section and analytical solution of strong non planer shock is obtained.
Genetic Divergence Studies in Pigeonpea [Cajanus cajan (L.) Millsp.]  [PDF]
Praveen Pandey, Rajesh Kumar, Vankat Raman Pandey, Mritunjay Tripathi
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.411264
Abstract:

The nature and extent of genetic diversity were assessed among 23 parents of pigeonpea hybrids employing Mahalanobis D2 statistics. Based on relative magnitude of D2, the genotypes were grouped into five different non-overlapping clusters. Cluster III, having 8 genotypes, emerged with highest number of entries; cluster I, II and V were constituted by four genotypes each while cluster IV, comprising three genotypes, had least number of entries. The highest contribution in manifestation of genetic divergence was exhibited by 100-seed weight followed by pods per plant, days to maturity, harvest index, biological yield per plant, days to 50% flowering and seed yield per plant. The maximum intra-cluster distance was observed for cluster III, followed by cluster IV, cluster I and cluster V. The highest inter-cluster distance was recorded between cluster II and IV followed by cluster I and IV and cluster V and II. The crossing between entries belonging to cluster pairs having large inter-cluster distance and possessing high cluster means for one or other characters to be improved may be recommended for isolating desirable recombinants in the segregating generations in pigeonpea. Considering the mean performance for different characters of genotypes belonging to diverse clusters, the promising genotypes identified were NDA 2, NDA 7-11, IPA 208 and NDA 5-14 of cluster I; NDA 3-3, NDA 98-6, Amar and NDACMS 1-3A of cluster II; NDACMS 1-4A, NDACMS

Genetic Variability and Direct Selection Criterion for Seed Yield in Segregating Generations of Barley (Hordeum vulgare L.)  [PDF]
Sunil K. Yadav, Ashok K. Singh, Praveen Pandey, Smita Singh
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.69153
Abstract: The aim of this study was to determine nature and extent of variability parameters and their utilization in barley breeding programme. A total of 45 F1s along with their parents and F2 populations were evaluated in a randomized block design with 3 replications during Rabi (winter season) 2014. The various traits measured were days to 50% flowering, days to maturity, plant height, flag leaf area, upper leaf area, tillers-plant, spikes-plant, spike length, grains-spike, spike weight, grain weight-spike, spike harvest index, 1000 grain weight, biological yield-plant, grain yield-plant (g), harvest index, grain size, husk content and protein content. Results showed that significant variation was observed for all the traits studied in the entire gene pool. The degree of genotypic and phenotypic coefficient of variation was high for tillers-plant, spike-plant, grain yield-plant, flag leaf area, harvest index, 1000 grain weight, grain weight-spike, upper leaf area and husk content. High heritability coupled with high genetic advance was recorded for tillers-plant, spikes-plant, grain yield-plant, flag leaf area, harvest index, grain weight-spike, upper leaf area, husk content, grain size and plant height suggesting that these traits are highly heritable and governed by additive gene action. Moderate heritability coupled with high genetic advance was observed for 1000 grain weight, biological yield-plant, spike length, protein content, grains-spike and spike weight; however, days to 50% flowering and days to maturity had moderate heritability coupled with low genetic advance suggesting preponderance on non-additive gene action in the inheritance of these traits. It could be concluded that
Giant Loose Body of Knee Joint Presenting as Accessory Patella
—A Case Report
 [PDF]

Praveen Kumar Pandey, Inder Pawar, Jyoti Gupta, Raaghav Rai Verma
Open Journal of Orthopedics (OJO) , 2015, DOI: 10.4236/ojo.2015.58031
Abstract: Loose bodies are freely floating fragments of cartilage or bone inside the knee joint space. This is commonly seen in association with degenerative joint disease (DJD), direct or indirect trauma, synovial chondromatosis, osteochondritis dissecans (OCD) and size of the loose body may vary from few millimeters to few centimeters. Patients with loose bodies in knee joint presented to orthopaedists with knee pain, swelling and restricted movement, with intermittent locking or catching of the joint. This is managed surgically most of the times when it becomes symptomatic. The surgical technique most commonly utilized is arthroscopy. Open arthrotomy should be done when the loose bodies are very large/numerous/located in posterior joint space. In review of literature, we found very few cases of giant loose body in knee joint due to DJD reported in last 70 years. We are hereby reporting our case of 60-year-old male with a giant loose body of same size as of patella in the supra-patellar pouch of left knee joint and managed by arthrotomy to remove the giant loose body. Post-operatively patient recovered significantly over the period of 6-week follow-up. In conclusion, giant loose body should be removed through arthrotomy and all such cases should be thoroughly evaluated to diagnose the cause of giant loose body.
Estimation of genetic parameters in indigenous rice
Praveen Pandey,P. John Anurag
Advances in Agriculture & Botanics , 2010,
Abstract: Significant genetic variability was observed among 22 genotypes of indigenous rice for yieldand quality contributing traits viz., number of spikelets per panicle, test weight, grain yield per hill,volume expansion ratio, head rice recovery, kernel length and length breadth ratio, indicating thatthere is presence of sufficient amount of variability in the study material and there is scope ofselection. On the basis of mean performance of yield and yield contributing traits it was concluded that“Indrani” was the best performer for both yield and quality which was at par with the hieghest yieldergenotype Jhumeri. For quality parameters Narendra-359 and Indrani were good, milling percentage ofLohandi was best followed by Bayalu & Dudagi general types. The results showed that PCV (phenotypiccoefficient of variance) in general was higher than GCV (genotypic coefficient of variation) for variouscharacters. However the difference between GCV and PCV was low for most of the characters studied.This indicates less degree of environmental influence on manifestation of these characters. Highheritability coupled with high genetic advance were recorded for number of spikelets per panicle,hulling percentage, milling percent and head rice recovery indicated the major role of additive geneaction in the inheritance of these character and these characters could be improved by selection insegregating generation. Thus, these characters may serve as an effective selection parameter duringbreeding programme for crop improvement.
Depiction of genetic divergence in rice (Oryza sativa L.)
Praveen Pandey,P. John Anurag
Advances in Agriculture & Botanics , 2010,
Abstract: The nature and magnitude of genetic divergence in 40 rice (Oryza sativa L.) genotypes fortwelve yield and yield component were assessed using Mahalanobis D2-statistics. The analysis ofvariance revealed highly significant differences for all the characters under studied, indicating thatthere is an ample scope for isolation of promising lines from present gene pool for yield improvement.On the basis of D2 values the genotypes were grouped into seven clusters. Cluster VI was the largestcontaining 11 genotypes followed by cluster III with 9 genotypes. The composition of clusters indicatednon existence of correspondence between genetic diversity and geographical distribution. Plant height,biological yield and test weight contributed considerably, accounting for 86.16 % of total divergence.The highest intercluster distance was observed between cluster II and VII therefore the genotypesfrom cluster II (Triguna, MAUB-15, Pant dhan-6) having desired mean values for characters like daysto 50% flowering, panicle length and harvest index, were more divergent from the genotypes of clusterVII (Sonachur & Mala) having desired mean values for plant height, flag leaf width, spikelets perpanicle, biological yield and test weight, may be used in hybridization programme to achieve desiredsegregants with higher yield
MICRO AND NANOBUBBLE WATER
PRAVEEN KUMAR PANDEY,AMAN JAIN,SHRUTI DIXIT
International Journal of Engineering Science and Technology , 2012,
Abstract: Nanobubble is a mystery in terms of stability and longevity. Nanobubble, now directly imaged by tapping mode atomic force microscopy or by dynamic light scattering, were previously inferred from long ranged attraction between hydrophobic surfaces immersed in water. They exists in an interconnected, irregular and closed pack structure whose lifetime is in order of hours and whose morphology is dependent upon the pH.
Current Controlled Differential Difference Current Conveyor Transconductance Amplifier and Its Application as Wave Active Filter
Neeta Pandey,Praveen Kumar,Jaya Choudhary
ISRN Electronics , 2013, DOI: 10.1155/2013/968749
Abstract:
Current Controlled Differential Difference Current Conveyor Transconductance Amplifier and Its Application as Wave Active Filter
Neeta Pandey,Praveen Kumar,Jaya Choudhary
ISRN Electronics , 2013, DOI: 10.1155/2013/968749
Abstract: This paper proposes current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA), a new active building block for analog signal processing. The functionality of the proposed block is verified via SPICE simulations using 0.25?μm TSMC CMOS technology parameters. The usefulness of the proposed element is demonstrated through an application, namely, wave filter. The CCDDCCTA-based wave equivalents are developed which use grounded capacitors and do not employ any resistors. The flexibility of terminal characteristics is utilized to suggest an alternate wave equivalents realization scheme which results in compact realization of wave filter. The feasibility of CCDDCCTA-based wave active filter is confirmed through simulation of a third-order Butterworth filter. The filter cutoff frequency can be tuned electronically via bias current. 1. Introduction The current mode approach for analog signal processing circuits and systems has received considerable attention and emerged as an alternate method besides the traditional voltage mode circuits [1] due to its potential performance features like wide bandwidth, less circuit complexity, wide dynamic range, low power consumption, and high operating speed. The current mode active elements are appropriate to operate with signals in current, voltage, or mixed mode and are gaining acceptance as building blocks in high performance circuit designs which is clear from the availability of wide variety of current mode active elements [2–10]. Recently some analog building blocks [11–16] based on current conveyor variants and transconductance amplifier (TA) cascades in monolithic chip are proposed in open literature which gives compact implementation of signal processing circuits and systems. The examples of such blocks are current conveyor transconductance amplifier (CCTA) [11, 12], current controlled current conveyor transconductance amplifier (CCCCTA) [13], differential voltage current conveyor transconductance amplifier (DVCCTA) [14], differential voltage current controlled conveyor transconductance amplifier DVCCCTA [15], and differential difference current conveyor transconductance amplifier (DDCCTA) [16]. A new active building block, namely, current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) which has current controlled differential difference current conveyor (CCDDCC) [10] as input block followed by a TA. The CCDDCCTA possesses all the good properties of CCCCTA and DVCCCTA including the possibility of inbuilt tuning of the parameters of
Effectiveness of using teachers to screen eyes of school-going children in Satna district of Madhya Pradesh, India
Sudhan Anand,Pandey Arun,Pandey Suresh,Srivastava Praveen
Indian Journal of Ophthalmology , 2009,
Abstract: Aim : To assess the effectiveness of teachers in a vision screening program for children in classes 5th to 12th attending school in two blocks of a district of north central India. Materials and Methods : Ophthalmic assistants trained school teachers to measure visual acuity and to identify obvious ocular abnormalities in children. Children with visual acuity worse than 20/30 in any eye and/or any obvious ocular abnormality were referred to an ophthalmic assistant. Ophthalmic assistants also repeated eye examinations on a random sample of children identified as normal (approximately 1%, n=543) by the teachers. Ophthalmic assistants prescribed spectacles to children needing refractive correction and referred children needing further examination to a pediatric ophthalmologist at the base hospital. Results : Five hundred and thirty teachers from 530 schools enrolled 77,778 children in the project and screened 68,833 (88.50%) of enrolled children. Teachers referred 3,822 children (4.91%) with eye defects for further examination by the ophthalmic assistant who confirmed eye defects in 1242 children (1.80% of all screened children). Myopia (n=410, 33.01%), Vitamin A deficiency (n=143, 11.51%) and strabismus (n=134, 10.79%) were the most common eye problems identified by the ophthalmic assistant. Ophthalmic assistants identified 57.97% referrals as false positives and 6.08% children as false negatives from the random sample of normal children. Spectacles were prescribed to 39.47% of children confirmed with eye defects. Conclusions : Primary vision screening by teachers has effectively reduced the workload of ophthalmic assistants. High false positive and false negative rates need to be studied further.
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