Evaluation of correction of kyphotic deformity in dorso-lumbar spinal injuries by posterior stabilization with pedicular screw rod fixation

Background: Acute injury to dorso-lumbar spine is the second most frequent site after cervical spine in adults. The injury, although not associated with high mortality, causes severe morbidity. The management of the traumatic dorso-lumbar spine injuries has improved considerably in the last few years. The objective of the study was to evaluate correction of kyphotic deformity in dorso-lumbar spinal injuries by posterior stabilization with pedicular screw rod fixation.Methods: The study includes 52 patients with dorso-lumbar spinal injuries with or without neurological deficit treated between 2006 and 2014. Pre and postoperative kyphosis was measured by Cobb’s method on plain radiographs. Pre and postoperative neurological status was evaluated based on Frankel’s classification. All un-stable dorso-lumbar spine injuries where two or more columns are involved on X-ray and CT scan were included in the present study.Results: Majority of the patients were in the age group of 20-30 years (38.5%) followed by 31-40 years (30.8%). Males were more than females. The most common mode of injury was road traffic injury in 71.2% of the cases. The most common level of injury was at L1 in 28.8% of the cases followed by at level D12 in 25% of the cases. In all the groups the mean kyphosis angle is reduced significantly. Overall the improvement rate was 94.2% and failure rate was only 5.8%.Conclusions: In conclusion the posterior reduction and internal fixation is a useful procedure in the treatment of the acute injuries of the dorsolumbar spine.

Acoustical-Mode-Driven Electron-Phonon Coupling in Transition-Metal Diborides

We show that the electron-phonon coupling in the transition-metal diborides NbB2 and TaB2 is dominated by the longitudinal acoustical (LA) mode, in contrast to the optical E_{2g} mode dominated coupling in MgB2. Our ab initio results, described in terms of phonon dispersion, linewidth, and partial electron-phonon coupling along Gamma to A, also show that (i) NbB2 and TaB2 have a relatively weak electron-phonon coupling, (ii) the E_{2g} linewidth is an order of magnitude larger in MgB2 than in NbB2 or TaB2, (iii) the E_{2g} frequency in NbB2 and TaB2 is considerably higher than in MgB2, and (iv) the LA frequency at A for TaB2 is almost half of that of MgB2 or NbB2.Comment: 4 pages, 4 figures, and 1 tabl

The role of open reduction and internal fixation in the treatment of the intercondylar fractures of humerus

Background: Inter-condylar fractures represent one of the most complicated and challenging fractures in the upper extremity. The results of managing these fractures non-operatively are limited by failure to get anatomical reduction and early mobilization, which often results in painful stiff elbow and/or pseudo-arthrosis. The objective of this study was to evaluate and analyse the role of open reduction and internal fixation in inter-condylar fractures of distal humerus.Methods: The present study was done in Malla Reddy Institute of Medical Sciences between June 2014 and June 2017. Out of 34 cases of intercondylar fractures of humerus admitted during the period, 25 patients were selected for the study that satisfied our inclusion criteria. Three patients out of those selected could not be included in the study as one had cardiac issues pre-operatively, one refused surgery and one was lost to follow up.Results: Our study included 22 patients, 14 male and 8 female patients. Their average age was 41.4 years. The fractures were classified as per the AO classification. There were B1-3, B2-1, C1-6, C2-5, C3-7 fractures. Both compound and closed fractures were included. All the patients were operated by posterior olecranon Chevron osteotomy approach by a senior faculty member. Twenty two patients who satisfied our inclusion criteria were treated, followed up and the results analyzed using Cassabaum’s scale of elbow function we had 86% of excellent to good results. Our results are comparable with other similar studies.Conclusions: Posterior olecranon approach was found to be of most satisfactory approach by us. It allows good exposure of the joint and the ulnar nerve

Antimicrobial Activity and Phytochemical Analysis of Coriander sativum Against Infectious Diarrhea

The preliminary phytochemical study and invitro antimicrobial activity of Coriander sativum (Apiaceae) was investigated against some pathogens isolated from patients with infectious diarrhea. The various solvents extract like aqueous, methanol, chloroform, petroleum ether and hexane were screened for antimicrobial activity against Enterotoxigenic E.coli, Enteropathogenic E.coli,, Salmonella typhimurium, Salmonella entertidis, Shigella dysentriae, Shigella flexineri, Candida albicans, Candida tropicalis and Candida krusei isolated from diarrhoeal patients. The preliminary phytochemical analysis of the methanol extracts of the plant showed the presence of carbohydrates, flavonoids, aminoacids, steroids, sterols, saponins and tannins. The extracts were subjected for antimicrobial activity against at 200mg/ml concentration by disc diffusion method. The results of antimicrobial activity revealed that methanol extract of the plant exhibit good activity compared to chloroform and aqueous extracts to E.coli, Salmonella sp and Shigella sp. Petroleum ether and hexane extracts did not show any activity. None of extracts exhibits antifungal activity. The antimicrobial activities of extracts were compared with standard antibiotics

Filtering data streams for entity-based continuous queries

The idea of allowing query users to relax their correctness requirements in order to improve performance of a data stream management system (e.g., location-based services and sensor networks) has been recently studied. By exploiting the maximum error (or tolerance) allowed in query answers, algorithms for reducing the use of system resources have been developed. In most of these works, however, query tolerance is expressed as a numerical value, which may be difficult to specify. We observe that in many situations, users may not be concerned with the actual value of an answer, but rather which object satisfies a query (e.g., "who is my nearest neighbor?). In particular, an entity-based query returns only the names of objects that satisfy the query. For these queries, it is possible to specify a tolerance that is "nonvalue-based. In this paper, we study fraction-based tolerance, a type of nonvalue-based tolerance, where a user specifies the maximum fractions of a query answer that can be false positives and false negatives. We develop fraction-based tolerance for two major classes of entity-based queries: 1) nonrank-based query (e.g., range queries) and 2) rank-based query (e.g., k-nearest-neighbor queries). These definitions provide users with an alternative to specify the maximum tolerance allowed in their answers. We further investigate how these definitions can be exploited in a distributed stream environment. We design adaptive filter algorithms that allow updates be dropped conditionally at the data stream sources without affecting the overall query correctness. Extensive experimental results show that our protocols reduce the use of network and energy resources significantly. © 2006 IEEE.published_or_final_versio

Role of Boron p-Electrons and Holes in Superconducting MgB2, and other Diborides: A Fully-Relaxed, Full-Potential Electronic Structure Study

We present the results of fully-relaxed, full-potential electronic structure calculations for the new superconductor MgB2, and BeB2, NaB2, and AlB2, using density-functional-based methods. Our results described in terms of (i) density of states (DOS), (ii) band-structure, and (iii) the DOS and the charge density around the Fermi energy EF, clearly show the importance of B p-band for superconductivity. In particular, we show that around EF, the charge density in MgB2, BeB2 and NaB2 is planar and is associated with the B plane. For BeB2 and NaB2, our results indicate qualitative similarities but significant quantitative differences in their electronic structure due to different lattice constants a and c.Comment: 4 pages, 4 figures, Submitted to Phys Rev. Lett. on March 6, 2001; resubmission on April 2

Indexing multi-dimensional uncertain data with arbitrary probability density functions

Research Session 26: Spatial and Temporal DatabasesIn an "uncertain database", an object o is associated with a multi-dimensional probability density function (pdf), which describes the likelihood that o appears at each position in the data space. A fundamental operation is the "probabilistic range search" which, given a value p q and a rectangular area r q, retrieves the objects that appear in r q with probabilities at least p q. In this paper, we propose the U-tree, an access method designed to optimize both the I/O and CPU time of range retrieval on multi-dimensional imprecise data. The new structure is fully dynamic (i.e., objects can be incrementally inserted/deleted in any order), and does not place any constraints on the data pdfs. We verify the query and update efficiency of U-trees with extensive experiments.postprintThe 31st International Conference on Very Large Data Bases (VLDB 2005), Trondheim, Norway, 30 August-2 September 2005. In Proceedings of 31st VLDB, 2005, v. 3, p. 922-93

Cemented hemi arthroplasty for unstable intertrochanteric fractures in elderly

Background: The incidence of the intertrochanteric fractures is increasing in recent times. It is found that more and more of these fractures are seen in elderly. The treatment of these fractures was historically non surgical. The use of dynamic hip screw and angled blade plate in the surgical management of these fractures is a recent practice. The objective of the study was to analyse the role of cemented hemi-arthroplasty in the treatment of unstable inter trochanteric fractures in elderly.Methods: This study was conducted between June 2014 to June 2016. Results were analysed prospectively. From a total 94 inter trochanteric fractures admitted during this period 20 patients were chosen who fulfilled our inclusion criteria. All the patients were treated in Malla Reddy Institute of Medical Sciences. Primary cemented hemiarthroplasty was done in the entire patient by a senior faculty member. The results were assessed according to Harris hip score.Results: There were 13 females and 7 males in our study. The average age was 69.2 years. There was Evan’s type 1-c 11, 1-d 7 and 1-e 2 in numbers all the patients were followed up for a period of 18 months.Conclusions: In our short study, it is concluded that the primary cemented hemi arthroplasty is a good option in unstable inter trochanteric fractures in elderly

Effects of Disorder in FeSe : An Ab Initio Study

Using the coherent-potential approximation, we have studied the effects of excess Fe, Se-deficiency, and substitutions of S, Te on Se sub-lattice and Co, Ni and Cu on Fe sub-lattice in FeSe. Our results show that (i) a small amount of excess Fe substantially disorders the Fe-derived bands while Se-deficiency affects mainly the Se-derived bands, (ii) the substitution of S or Te enhances the possibility of Fermi surface nesting, specially in FeSe$_{0.5}$Te$_{0.5}$, in spite of disordering the Se-derived bands, (iii) the electron doping through Co, Ni or Cu disorders the system and pushes down the Fe-derived bands, thereby destroying the possibility of Fermi surface nesting. A comparison of these results with the rigid-band, virtual-crystal and supercell approximations reveals the importance of describing disorder with the coherent-potential approximation.Comment: Redone VCA calculations, and some minor changes. (Accepted for publication in Journal of Physics:Condensed Matter

Correlations due to localization in quantum eigenfunctions of disordered microwave cavities

Non-universal correlations due to localization are observed in statistical properties of experimental eigenfunctions of quantum chaotic and disordered microwave cavities. Varying energy {E} and mean free path {l} enable us to experimentally tune from localized to delocalized states. Large level-to-level Inverse Participation Ratio (IPR I_{2}) fluctuations are observed for the disordered billiards, whose distribution is strongly asymmetric about . The density auto-correlations of eigenfunctions are shown to decay exponentially and the decay lengths are experimentally determined. All the results are quantitatively consistent with calculations based upon nonlinear sigma-models.Comment: 4 pages, LaTex, 5 .jpg figures. This paper with 5 embedded postscript figures available (PS,PDF) at http://sagar.physics.neu.edu/preprints