FIELD PROGRAMMABLE GATE ARRAY IMPLEMENTATION OF A VARIABLE LEAKY LEAST MEAN SQUARE ADAPTIVE ALGORITHM

Adaptive noise cancellation is an extensively researched area of signal processing. Many algorithms had been studied such as least mean square algorithm (LMS), recursive least square algorithm, and normalized LMS algorithm. The statistical characteristics of noise are fast in nature and the algorithms for noise cancellation should converge fast. Since LMS algorithm has slow convergence; in this paper, a variable leaky LMS (VLLMS) algorithm is explored. VLLMS is implemented using the concept of hardware-software cosimulation using Xilinx System Generator. The design is implemented on Virtex-6 ML605 field programmable gate array board. The implemented design is tested for sinusoidal signal added with an additivewhite Gaussian noise. The design summary and the utilization summary are presented.Â

OXIDATION OF IODIDE DURING RELEASE OF STORED ENERGY FROM GAMMA IRRADIATED CRYSTALLINE POTASSIUM BROMIDE IN AQUEOUS IODIDE SOLUTION

The stored energy in the form of color centers is released during dissolution of ?-irradiated crystalline   potassium bromide in aqueous potassium iodide solution. Various parameters like dose, amount and storage time of irradiated potassium bromide which control the yield of iodine have been studied. Similarly, the effect of concentration of potassium iodide has been investigated. The energy transfer parameter has been determined as the ratio of G/I2 obtained by the addition of irradiated crystalline potassium bromide on the basis of oxidation of iodide. Key words: - Irradiation, F-centre, Oxidation, Yield

Rate of Dissolution of γ-Irradiated Sodium Chloride Single Crystal Studied by Aquoluminescence

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Fully Verifiable Secure Delegation of Pairing Computation: Cryptanalysis and An Efficient Construction

We address the problem of secure and verifiable delegation of general pairing computation. We first analyze some recently proposed pairing delegation schemes and present several attacks on their security and/or verifiability properties. In particular, we show that none of these achieve the claimed security and verifiability properties simultaneously. We then provide a fully verifiable secure delegation scheme ${\sf VerPair}$ under one-malicious version of a two-untrusted-program model (OMTUP). ${\sf VerPair}$ not only significantly improves the efficiency of all the previous schemes, such as fully verifiable schemes of Chevallier-Mames et al. and Canard et al. by eliminating the impractical exponentiation- and scalar-multiplication-consuming steps, but also offers for the first time the desired full verifiability property unlike other practical schemes. Furthermore, we give a more efficient and less memory consuming invocation of the subroutine ${\sf Rand}$ for ${\sf VerPair}$ by eliminating the requirement of offline computations of modular exponentiations and scalar-multiplications. In particular, ${\sf Rand}$ includes a fully verifiable partial delegation under the OMTUP assumption. The partial delegation of ${\sf Rand}$ distinguishes ${\sf VerPair}$ as a useful lightweight delegation scheme when the delegator is resource-constrained (e.g. RFID tags, smart cards or sensor nodes)

The role of simple elbow dislocations in cubitus valgus development in children

We investigated the functional and radiological outcomes of conservatively treated simple traumatic elbow dislocations and subsequent incidence of cubitus valgus development in children. Eleven patients (one female, ten male; mean age 9.8 years, range seven to 12 years) who presented to our hospital with simple elbow dislocations and were conservatively treated between July 2008 and September 2010 were included in the study. All were posterolateral closed dislocations. None of the patients had accompanying elbow fractures. All patients had pre- and postoperative radiographic examinations. The carrying angle of the involved elbow was measured and compared to the contralateral non-injured elbow during follow-up. The incidence and severity of cubitus valgus development was assessed. The functional and clinical outcomes were evaluated using the Mayo Elbow Performance Scale. The mean monitoring period was 24.3 months (range 19-30 months). All patients had satisfactory good and excellent results (85-100 points; mean 96.8 points) according to the Mayo Elbow Performance Scale. The final average elbow flexion was 137A degrees (range, 130-145A degrees) and average extension was 8.6A degrees (range 0-20A degrees) with full supination and pronation in traumatic elbow. Four patients (36.4 %) had an average increase (cubitus valgus) of 14.5A degrees (10-20A degrees) in carrying angle compared to the other elbow. While isolated traumatic dislocation of the elbow is uncommon among children, it can be successfully treated by urgent closed reduction, proper fixation of the elbow and appropriate timely rehabilitation. However, it should be considered that some patients may develop cubitus valgus deformity in a later period. Therefore, each patient with a simple traumatic elbow dislocation should be followed, and the parents should be informed of the potential for any deformity development

Investigator experiences with financial conflicts of interest in clinical trials

<p>Abstract</p> <p>Background</p> <p>Financial conflicts of interest (fCOI) can introduce actions that bias clinical trial results and reduce their objectivity. We obtained information from investigators about adherence to practices that minimize the introduction of such bias in their clinical trials experience.</p> <p>Methods</p> <p>Email survey of clinical trial investigators from Canadian sites to learn about adherence to practices that help maintain research independence across all stages of trial preparation, conduct, and dissemination. The main outcome was the proportion of investigators that reported full adherence to preferred trial practices for all of their trials conducted from 2001-2006, stratified by funding source.</p> <p>Results</p> <p>844 investigators responded (76%) and 732 (66%) provided useful information. Full adherence to preferred clinical trial practices was highest for institutional review of signed contracts and budgets (82% and 75% of investigators respectively). Lower rates of full adherence were reported for the other two practices in the trial preparation stage (avoidance of confidentiality clauses, 12%; trial registration after 2005, 39%). Lower rates of full adherence were reported for 7 practices in the trial conduct (35% to 43%) and dissemination (53% to 64%) stages, particularly in industry funded trials. 269 investigators personally experienced (n = 85) or witnessed (n = 236) a fCOI; over 70% of these situations related to industry trials.</p> <p>Conclusion</p> <p>Full adherence to practices designed to promote the objectivity of research varied across trial stages and was low overall, particularly for industry funded trials.</p