In this paper, the propagation and scattering of acoustic waves in a flexible wave-guide involving step discontinuity at an interface is considered. The emerging boundary value problem is non-Sturm-Liouville and is solved by employing a hybrid mode-matching technique. The physical scattering process and attenuation of duct modes versus frequency regime and change of height is studied. Moreover,...

Aziza Ahmed (Northeastern University School of Law) “Human Rights, Epidemiology, and the Co-production of Identity/Risk Narratives in HIV Legal Advocacy” Identity has become the primary prism by which to understand and organize in response to the HIV epidemic. In this article I examine how identity is co-produced by HIV epidemiology and through international human rights activism. Beginning wit...

Neural stem cells go through a sequence of timely regulated gene expression and pattern of division mode to generate diverse neurons during brain development. During vertebrate cerebral cortex development, neural stem cells begin with proliferative symmetric divisions, subsequently undergo neurogenic asymmetric divisions, and finally gliogenic divisions. In this review, we explore the relations...

Phosphylated butyrylcholinesterase is one of the most important biomarkers to verify an exposure to nerve agents, and it can be analyzed with liquid chromatography-tandem mass spectrometry (LC-MS-MS) by detection of a phosphylated nonapeptide that results after digestion of butyrylcholinesterase (BuChE) with pepsin. For a sensitive analysis (low degree of BuChE inhibition), the identity of the ...

Picture this. You are having your regular medical checkup, when, all of a sudden, the physician turns to you and says: ‘‘Oh, did I remember to mention that you can now live forever?’’ You look at the doctor enquiringly and she goes on: ‘‘Well, it’s not actual immortality, you know, but they’ve invented this treatment—I don’t have the full details—that stops aging, getting physically older. It m...

ultrasoundelastographyisanon-invasivemethodwhichimagestheelasticityofsoft-tissues. tomakeanimage, preandafterasmallcompression, ultrasoundradio frequency(rf)signalsareacquiredandthetimedelaysbetweenthemareestimated. thefirstdifferentiationofdisplacementestimationsiscalledelastogram. inthisstudy, wearegoingtomakeanelastogramusingtheprocessingmethodnamed empirical mode decomposition (emd). emdisa...

Nowadays, identity-based client authentication (e.g., by username/ password) over SSL is the standard for user authentication on the Web. In particular, browser-based federated identity management (FIM) protocols prefer this technique to authenticate customers due to its user-convenience and lightweight access management. However, recent attacks known as phishing provide evidence that this auth...