Vortex reconnections between coreless vortices in binary condensates

Vortex reconnections plays an important role in the turbulent flows associated with the superfluids. To understand the dynamics, we examine the reconnections of vortex rings in the superfluids of dilute atomic gases confined in trapping potentials using Gross-Petaevskii equation. Furthermore we study the reconnection dynamics of coreless vortex rings, where one of the species can act as a tracer.Comment: 9 pages, Proceeding from International Conference On Complex Processes in Plasmas and Nonlinear Dynamical Systems, Gandhinagar, India (November 2012

Design Methodology of Small Signal Power Amplifier using Linear S-parameter Model

This paper illustrates the linear design procedure and simulation of small signal power amplifier at frequency of 900 MHz based on an RF MOSFET device of type RD45HMF1 [15] fromMISTUSHIBUSHI. The linear S-Parameter model of this device is used in Agilent ADS to design the power stage includingthe stability analysis,complex conjugate matching and design of source and load matching networks. The linear model is specifically required to achieve the desired gain with better input and output return losses.The matching network is then designed to achieve specified performance figures.It is hoped that the understanding gained through the work will be useful in futureSSPA developments

Microbial Biotransformation for the Production of Steroid Medicament

Androstenedione (AD) is a steroid intermediate valuable for the production of steroid medicaments. Microbial biotransformation of phytosterol to produce AD is a well-researched area. However, low substrate solubility of phytosterol in aqueous media and nucleus degradation of AD to androstadienedione (ADD) or 9-hydroxy-AD are the major obstacles for AD production leading to detailed research for optimization of biotransformation process. In this review, microbial transformation of AD with respect to the existing methods of chemical or biochemical synthesis of AD are extensively discussed. This review examines the microbial biotransformation process and limitations for enhanced AD production. Factors affecting the effective biotransformation process to obtain AD are discussed and limitations are highlighted. The main content of this review focuses on the recent and futuristic biotechnological advances and strategies in techniques to enhance AD bioprocess

Cruciate retaining versus posterior-stabilized total knee arthroplasty: a short-term comparative study

Background: Total knee arthroplasty has got excellent results. Among the techniques (posterior-stabilized vs posterior cruciate retaining total knee arthroplasty) it is unclear whether one design has superior outcome over another. The purpose of the present study was to directly compare clinical and radiological outcomes of these two designs.Methods: A prospective study involving 36 patients who received a cruciate-retaining implant were compared to 30 patients who received posterior-stabilized prosthesis. At 3 months follow-up time clinical and radiological evaluation done and results were analyzed.Results: At 3 months follow-up time mean knee society scores improved from 49.9/46.9 (objective/subjective score) points to 80.9/82.5 points in the cruciate-retaining group and from 48.2/43 (objective/subjective score) points to 80.4/80.2 points in the posterior-stabilized group. The ranges of motion was 117.2° (range, 90° to 130°) and 125.3° (range, 100° to 140°) in the cruciate-retaining and posterior-stabilized group respectively, at 3 month follow-up. One patient had post-operatively periprosthetic fracture reported after 2 weeks (treated conservatively), one had superficial infection (treated with dressing) and one patient with superfical infection required debridement.Conclusions: This study did not conclusively demonstrate the superiority of one knee design over the other, suggesting that the choice of implant should be based on surgeon preference, patients knee dimensions, pre-op knee deformity and existing pathology of the posterior cruciate ligament

Routine versus early nasogastric decompression in gastrointestinal surgeries: a randomized controlled trial

Background: Traditionally nasogastric decompression is carried out in post operatively in patients undergoing gastrointestinal surgery. The purpose of the study is to assess the benefits of nasogastric decompression in the early postoperative period as compared to routine nasogastric decompression in patients undergoing gastrointestinal surgeries. Objectives: To assess the benefits of nasogastric decompression in the early postoperative period as compared to routine nasogastric decompression in patients undergoing gastrointestinal surgeries, to assess the complications associated with nasogastric tube insertion, and to assess the effect of early nasogastric tube removal on the patients’ postoperative morbidity and comfort level.Methods: This was a randomized control trial done in the Shree Sayajirao General Hospital, Vadodara.  According to patient flow and previous study details the estimated sample size was 300 patients. Patient allotment was 150 patients in each group. Patients admitted on odd dates will be followed for routine nasogastric decompression, and patients admitted on even dates will be followed for early nasogastric decompression. Inclusion criteria for the study include laparotomies performed by any abdominal incisions on emergency as well as elective bases. Variables to be studied were patient comfort (according to patient’s opinion), vomiting (episodes, type, amount, content, on which post-operative day), abdominal distension, appearance of normal bowel sounds, passage of flatus and/or stools (according to patient’s history), incidence of aspiration pneumonia and total duration of the hospital stay with wound complications. Data will be processed and analyzed by chi square test and t-test.Results: In the study total 300 patients were included. No significant difference between both the groups in case of postoperative vomiting with p- value of 0.6028 (i.e. p > 0.05) and abdominal distension with p- value of 0.5183 (i.e. p > 0.05). Significant difference seen in the appearance of the bowel sound in post-operative period with p- value of 0.0002 (i.e. p < 0.05) and passage of flatus or stool with p-value of <0.0001. In case of early decompression group mean postoperative day for the suture removal was 11.9 days and for routine decompression group it was 12.3 days, the difference was statistically significant with p- value of 0.0006 (i.e. p < 0.05). The mean for the total hospital stay for early decompressed group was 10.04 days and for routine decompression group it was 10.47 days which was highly statically significant with p- value of 0.0001 (i.e. p < 0.05). Post-operative wound complication which was statically significance with p-value of 0.0394 (i.e. p < 0.05) and respiratory complications was also significant with p-value of 0.0367 (i.e. p < 0.05). In case of early decompression post-operative nausea, vomiting and abdominal distention were higher but not significant statistically.Conclusions: Early removal of Ryle’s tube leads to less incidence of respiratory complications and wound complications ultimately early suture removal and less hospital stay. Early removal of Ryle’s tube leads to early resolution of postoperative paralytic ileus indicated by early appearance of bowel sounds and early passage of flatus and stool.

Cosmogenic effects in Mbale chondrite

This article does not have an abstract