Conversion of Dynamic High Pressures from Air to Water for a Spherical TNT Charge

A numerical method has been applied to convert the dynamic high pressures from air-to-water for a spherical TNT charge. Standard equation of scaling law in air for TNT has been utilised to make the necessary conversions. The investigations have been made by taking into consideration the ambient pressure values for the two media. The calculations have been performed under the scaled distances to get better results. Experimental measurements using indigenous blast pressure gauge have been undertaken by detonating spherical charges of TNT under the same scaled distances in water to check the correctness of results and direct application of this method. A fairly close agreement between the theoretically computed and the experimental values of the dynamic high pressures shows the practical utility of this approach in that it enables an estimate of the experimental shock wave pressures, without conducting underwater experiments

A Case Report on Mandibular Second Molar Regarding Single C-Shaped Canal

C-shaped canal variation is commonly seen in mandibular second molars. Extra canals is not always a variation in root canals. Radiograph is a must for the identification of single canal. Thorough idea of the proper anatomy of root canals is utmost important to diagnose the variations

Single Canal in a Single-Rooted Mandibular Second Molar: A Paradox

During endodontic diagnosis multirooted teeth morphologically, shows variable root canal system . This case report explains the anatomical variations of root and root canals. Here it is shown that a single canal is present in mandibular second molar. Therefore we should be aware that a single canal can also be present in mandibular molar

Management of a case of thromboembolism post spine surgery: a case report

Postoperative deep vein thrombosis (DVT) of lower limbs is often asymptomatic. In many patients, fatal pulmonary embolism (PE) is the first clinical manifestation of postoperative venous thromboembolism (VTE). Routine screening for asymptomatic DVT of the lower limbs has a low sensitivity and is quite impractical. For these reasons, routine and systematic prophylaxis in patients at risk, is the strategy of choice to reduce the burden of VTE after surgery. If used appropriately such prophylaxis is cost effective since it reduces the incidence of symptomatic thromboembolic events, which require costly diagnostic procedures and prolonged anticoagulation therapy. Here we report the post-operative course of a spine surgery patient, presenting with DVT in calf veins, which lodged into pulmonary artery and was managed successfully with low molecular weight heparin (LMWH), embolectomy, inferior vena cava (IVC) filter, and dabigatran

Volatility of Linear and Nonlinear Time Series

Previous studies indicate that nonlinear properties of Gaussian time series with long-range correlations, $u_i$, can be detected and quantified by studying the correlations in the magnitude series $|u_i|$, i.e., the ``volatility''. However, the origin for this empirical observation still remains unclear, and the exact relation between the correlations in $u_i$ and the correlations in $|u_i|$ is still unknown. Here we find analytical relations between the scaling exponent of linear series $u_i$ and its magnitude series $|u_i|$. Moreover, we find that nonlinear time series exhibit stronger (or the same) correlations in the magnitude time series compared to linear time series with the same two-point correlations. Based on these results we propose a simple model that generates multifractal time series by explicitly inserting long range correlations in the magnitude series; the nonlinear multifractal time series is generated by multiplying a long-range correlated time series (that represents the magnitude series) with uncorrelated time series [that represents the sign series $sgn(u_i)$]. Our results of magnitude series correlations may help to identify linear and nonlinear processes in experimental records.Comment: 7 pages, 5 figure

Ewing’s sarcoma or peripheral primitive neuroectodermal tumor at the base of tongue: a rare location case report

Peripheral primitive neuroectodermal tumor now termed as Ewings sarcoma/PNET, representing a family of tumors with varying degrees of neuronal differentiation and genetic rearrangements. Most common sites are extraosseous involving trunk and lower limb. Base of tongue is a very rare site for Ewing’s/PNET, hence in view of rarity of the location as an uncommon presentation, the case has been reported for the better understanding and supporting the literature with the similar finding. A 68 years old female patient presented with the complaint of difficulty in swallowing since 3 months. On examination growth was identified at the left side base of tongue. Biopsy was processed and stained with H&E and other relevant markers. Differentials on the basis microscopic examination were lymphoma, neuroendocrine tumor and primitive neuroectodermal tumor. Various immunohistochemical markers to rule out the given differential were used. The tumor was positive for CD 99 and vimentin. The case was repored as PNET. Peripheral PNET is a challenging topic. Wide range of extraosseous locations have been observed but head and neck being less reported needs to be studied for understanding the behavior of this highly malignant disease in this rare location so that patient can be benefitted by advanced multimodality treatments including surgery, chemotherapy and radiotherapy