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Search Results: 1 - 10 of 312 matches for " Ahuja Bhoomika "
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Dentin hypersensitivity: Recent trends in management
Miglani Sanjay,Aggarwal Vivek,Ahuja Bhoomika
Journal of Conservative Dentistry , 2010,
Abstract: Dentinal hypersensitivity (DH) is a common clinical condition usually associated with exposed dentinal surfaces. It can affect patients of any age group and most commonly affects the canines and premolars of both the arches. This article concisely reviews the patho-physiology, mechanism and clinical management of the DH. Treatment of DH should start with an accurate diagnosis. Differential diagnosis should be made and all other probable causes should be excluded. An often neglected phase of clinical management of DH is the identification and treatment of the causative factors of DH. By removing the etiological factors, the condition can be even prevented from occurring or recurring. There are various treatment modalities available which can be used at home or may be professionally applied. The "at home" desensitizing agents include toothpastes, mouthwashes or chewing gums and they act by either occluding the dentinal tubules or blocking the neural transmission. This article also discusses the recent treatment options like bioglass, Portland cement, lasers and casein phosphopeptide.
Regionalization of River Basins Using Cluster Ensemble  [PDF]
Sangeeta Ahuja
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.47065
Abstract: In the wake of global water scarcity, forecasting of water quantity and quality, regionalization of river basins has attracted serious attention of the hydrology researchers. It has become an important area of research to enhance the quality of prediction of yield in river basins. In this paper, we analyzed the data of Godavari basin, and regionalize it using a cluster ensemble method. Cluster Ensemble methods are commonly used to enhance the quality of clustering by combining multiple clustering schemes to produce a more robust scheme delivering similar homogeneous basins. The goal is to identify, analyse and describe hydrologically similar catchments using cluster analysis. Clustering has been done using RCDA cluster ensemble algorithm, which is based on discriminant analysis. The algorithm takes H base clustering schemes each with K clusters, obtained by any clustering method, as input and constructs discriminant function for each one of them. Subsequently, all the data tuples are predicted using H discriminant functions for cluster membership. Tuples with consistent predictions are assigned to the clusters, while tuples with inconsistent predictions are analyzed further and either assigned to clusters or declared as noise. Clustering results of RCDA algorithm have been compared with Best of k-means and Clue cluster ensemble of R software using traditional clustering quality measures. Further, domain knowledge based comparison has also been performed. All the results are encouraging and indicate better regionalization of the Godavari basin data.
An Introduction to RFID Technology  [PDF]
Sanjay Ahuja, Pavan Potti
Communications and Network (CN) , 2010, DOI: 10.4236/cn.2010.23026
Abstract: RFID technology emerged some time back and was not used that much because of lack of standardization and high costs. Latest technologies have brought costs down and standards are being developed. Today RFID is mostly used as a medium for numerous tasks including managing supply chains, tracking livestock, preventing counterfeiting, controlling building access, and supporting automated checkout. The use of RFID is limited by security concerns and delays in standardization. This paper describes RFID technology and its applications in today’s world.
Attention and Memory Biases as Stable Abnormalities Among Currently Depressed and Currently Remitted Individuals with Unipolar Depression
Rashmi Gupta,Bhoomika R. Kar
Frontiers in Psychiatry , 2012, DOI: 10.3389/fpsyt.2012.00099
Abstract: Background: In the present study, we explored the possibility of the stability of attention bias and memory bias in currently remitted individuals with unipolar depression compared to currently depressed individuals with unipolar depression and never-depressed individuals. Methods: The Emotional Stroop and autobiographical memory task (AMT) were administered on 10 participants, who were currently depressed, currently remitted with unipolar depression, or never-depressed. In the emotional Stroop task (EST), the respondent’s task was to indicate the color of the ink of the positive, negative, and neutral words by selecting one of a series of colored blocks. In the AMT, participants were presented with positive, negative, and neutral cue words. For each word, they were asked to report specific events from their life. Results: Both the attention bias and memory bias exist in both the clinical groups. In EST, both currently depressed and currently remitted groups were slower to respond to negative words compared to neutral words. Unlike EST, in AMT both currently depressed and currently remitted groups were slower to respond to positive words compared to neutral words. Interestingly, the capacity to generate specific events for negative events was higher in both currently depressed and currently remitted groups. They were over-general in their memories of positive events. Importantly, the never-depressed group was specific in their memories of both positive and negative events of their life. Conclusion: Our findings provide evidence for the stable existence of attention and memory bias in currently remitted individuals. This study has implications for the cognitive behavior therapy for depression to include modules to resolve the attention and memory bias toward negative thought and content, and to build strategies to overcome such biases.
Odd tensor electric transitions in high-spin Sn-isomers and generalized seniority
Bhoomika Maheshwari,Ashok Kumar Jain
Physics , 2015, DOI: 10.1016/j.physletb.2015.11.079
Abstract: The similar behavior of the B(E1) values of the recently observed 13- odd tensor E1 isomers and the B(E2) values of the 10+ and 15- even tensor E2 isomers in the Sn-isotopes has been understood in terms of the generalized seniority for multi-j orbits by using the quasi-spin scheme. This simple approach proves to be quite successful in explaining the measured transition probabilities and the corresponding half-lives in the high-spin isomers of the semi-magic Sn-isotopes. Hence, we show for the first time the occurrence of seniority isomers in the 13- Sn-isomers, which decay by odd-tensor E1 transitions to the same seniority states.
Comparative study of high-spin isomers in semi-magic $Z$=50 isotopic and $N$=82 isotonic chains
Bhoomika Maheshwari,Ashok Kumar Jain
Physics , 2014,
Abstract: We present a comparative study of the high-spin ${11/2}^-$, ${10}^+$ and ${27/2}^-$ nuclear isomers, observed commonly in the full semi-magic $Z=50$ isotopic and $N=82$ isotonic chains, which are found to display nearly identical systematics in excitation energy and half-lives. A constant and particle number independent energy gap of $\sim$ 4 MeV between the $0^+$ ground states and ${10}^+$ isomers and, the ${11/2}^-$ and ${27/2}^-$ isomers exists before the mid-shell, which declines near the mid-shell, and then becomes constant at $\sim$ 3 MeV after the mid-shell. Large scale shell model calculations are carried out for the full chains of Sn-isotopes and $N=82$ isotones, which reproduce the observed energy systematics reasonably well. The role of seniority, generalized seniority and alignment in the high-spin isomeric states as well as in the states populating the high spin isomers has been discussed. The empirical features suggest that the generalized seniority, known to be valid in the low lying states of even-even nuclei before the mid-shell, remains good up to the ${10}^+$ isomeric states; we further extend this interpretation to the odd-A nuclei before the mid-shell, particularly the ${27/2}^-$ isomers. The seniority becomes good after the mid-shell. The change in energy gap around the mid-shell, therefore, marks a transition from the generalized seniority regime to the seniority regime. From the alignment considerations, the high-spin isomers after the mid-shell emerge as maximally aligned decoupled states. We also note that the similar features of the isomeric half-lives in both the chains may be understood in terms of their similar seniorities and configurations. An overview of the $0^+$ to ${10}^+$ yrast states in the full chain of even-even Sn-isotopes has also been presented. We also make some predictions of possible new isomers based on the empirical systematics.
An Assessment of WiMax Security  [PDF]
Sanjay P. Ahuja, Nicole Collier
Communications and Network (CN) , 2010, DOI: 10.4236/cn.2010.22020
Abstract: For a broadband wireless standard such as WiMax, security is important and must be addressed. This is to ensure wide acceptance both from the perspective of the end users and the service providers. In order to com-pete with existing broadband cable or DSL services, the WiMax network must offer comparable security. We discuss the WiMax security mechanisms for authentication, encryption, and availability. We also discuss potential threats to WiMax security. This paper will also discuss how and why these threats play an impor-tant role in the adaptability of WiMax.
Enterprise Service Bus: A Performance Evaluation  [PDF]
Sanjay P. Ahuja, Amit Patel
Communications and Network (CN) , 2011, DOI: 10.4236/cn.2011.33016
Abstract: The flexibility offered by an Enterprise Service Bus (ESB) in enabling various applications to exchange data makes it a very important middleware layer that is responsible for transporting data in a Service-Oriented Architecture (SOA). The popularity of the ESB has given rise to a number of commercial off the shelf (COTS) products as well as open source ESBs. In this study, we evaluated three open source ESBs and compared them both qualitatively and quantitatively. The empirical results were statistically tested to determine the statistical significance of the results.
Regionalization of Rainfall Using RCDA Cluster Ensemble Algorithm in India  [PDF]
Sangeeta Ahuja, C. T. Dhanya
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.58065
Abstract: The magnitude and frequency of precipitation is of great significance in the field of hydrologic and hydraulic design and has wide applications in varied areas. However, the availability of precipitation data is limited to a few areas, where the rain gauges are successfully and efficiently installed. The magnitude and frequency of precipitation in ungauged sites can be assessed by grouping areas with similar characteristics. The procedure of grouping of areas having similar behaviour is termed as Regionalization. In this paper, RCDA cluster ensemble algorithm is employed to identify the homogeneous regions of rainfall in India. Cluster ensemble methods are commonly used to enhance the quality of clustering by combining multiple clustering schemes to produce a more robust scheme delivering similar homogeneous regions. The goal is to identify, analyse and describe hydrologically similar regions using RCDA cluster ensemble algorithm. RCDA cluster ensemble algorithm, which is based on discriminant analysis. The algorithm takes H base clustering schemes each with K clusters, obtained by any clustering method, as input and constructs discriminant function for each one of them. Subsequently, all the data tuples are predicted using H discriminant functions for cluster membership. Tuples with consistent predictions are assigned to the clusters, while tuples with inconsistent predictions are analyzed further and either assigned to clusters or declared as noise. RCDA algorithm has been compared with Best of K-means and Clue cluster ensemble of R software using traditional clustering quality measures. Further, domain knowledge based comparison has also been performed. All the results are encouraging and indicate better regionalization of the rainfall in different parts of India.
Evaluation for the retention of reproductive structures by Bt and non-Bt intra hirsutum cotton hybrids in different sowing dates and spacings
SL Ahuja
African Journal of Biotechnology , 2006,
Abstract: The retention of the reproductive structures (bolls) was evaluated at 90,120 and 160 days of maturity in eight Bt and non-Bt hybrids from three Private R&D establishments on three dates of sowings (90,120 and 160 days of maturity) and two spacings of 67.5 x 60 cm and 100 x 30 cm. Ankur group Bt hybrids; 651, 2226 and 2534 had reproductive structures retentivity higher than their non-Bt counterpart hybrids in all the three sowings and spacings. However, RCH group Bt hybrids; 134 and 138 had lesser/comparable boll retentivity in first two observations at 90 and 120 days in the earliest and the next sowing. In the last sowing with wider inter row spacing their trend was similar to Ankur group hybrids in the first sowing. MRC 6301 also behaved like RCH group hybrids. Bt hybrids of all the three establishments had more reproductive structure retentivity than their non-Bt hybrids counterparts in early, closer inter row and wider intra row sowing except for Bt hybrid RCH134 which had the highest bearing in the late sowing with wider inter row and closer intra row spacing. Association study indicated similar trend of boll bearing in Bt and non-Bt hybrids in early sowing and this trend seems to be reverse in later sowings
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