DenialofService (DoS) attacks are a critical threat to the Internet. It is very laborious to trace back the attackers for the reason that of memory less feature of the web routing mechanisms. As a result, there's no effective and economical technique to handle this issue. In this project, traces back of the attackers are efficiently identified and also to protect the data from the attackers usi...

OBJECTIVES The purpose of this study was to compare in-vitro the amount of debris extruded apically from extracted teeth, using K3, Protaper rotary instruments and manual step-back technique. METHODS Forty five human single-rooted mandibular premolar teeth were randomly divided into 3 groups. The teeth in 3 groups were instrumented until reaching the working length with K3, Protaper rotary in...

The single biggest problem with solution-phase H/D exchange as a mass spectrometric probe of surface exposure in a protein (or protein complex) is back-exchange of H for D after the initial H/D exchange has been quenched. Back-exchange results in loss of pertinent data and also greatly hampers data analysis. Previously, very fast, cold (0-4 degrees C) HPLC was performed to help reduce back-exch...

introduction: to compare the cleaning effectiveness of k3 and race niti rotary systems with k-flexo file instruments during the preparation of curved canals in extracted human teeth. materials and methods: a total of 50 root canals of mandibular and maxillary molars with curvatures ranging between 25º and 35 º were divided in three groups of 15 each and 5 as negative control groups. canals were...

background: musculoskeletal disorders (msds) are one of the most common causes of occupational injuries that appear mainly in back, neck and upper limb. this study was conducted with the objectives of determination of prevalence rate of msds among workers of a generator manufacturing company and ergonomics assessment of working conditions. methods: in this study, 319 workers randomly selected p...

In this work the synthesization process of nanocrstallite Nd:KTP powders by modified Pechini method was studied. The results of XRD studies indicate that KTP nanocrystallites doped by Nd has orthorhombic phase. The structural and lattice modes of the synthesized nanocrystallite products were investigated by using Micro Raman back scattering and FT-IR transmission spectroscopies. SEM imaging tec...

The aim of this study was to establish whether the mobilisation technique selected by the treating physiotherapist is more effective in relieving low back pain than a randomly selected mobilisation technique. Two manipulative physiotherapists and 140 subjects suffering non-specific low back pain participated. Baseline measurements were taken before treatment allocation; the therapist then asses...

In this paper, we investigated a C-arm tomographic technique as a new three dimensional (3D) kidney imaging method for nephrolithiasis and kidney stone detection over view angle less than 180o. Our C-arm tomographic technique provides a series of two dimensional (2D) images with a single scan over 40o view angle. Experimental studies were performed with a kidney phantom that was formed from a p...

The efficacy of five instrumentation techniques for cleaning the apical third of curved root canals was assessed by histological examination. Mesial root canals of freshly extracted human mandibular molars were prepared by the following instrumentation methods: step-back technique using stainless steel files; step-back technique using nickel-titanium files; ultrasonic technique; balanced force ...