B. B. Breed, M.D.

Stephen B. Thacker, MD, MSc — 1947–2013

Stephen B. Thacker, MD, MSc, a retired Assistant Surgeon General in the U.S. Public Health Service, and recent Director of the Office of Surveillance, Epidemiology, and Laboratory Services at CDC, died on February 15, 2013, in Atlanta, Georgia. He was 65. Dr. Thacker served with distinction in key CDC positions, including Deputy Director (Acting), during a career that spanned more than 36 years...

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The 1976 seminal paper of Diie and Hellman is a landmark in the history of cryptography. They introduced the fundamental concepts of a trapdoor one-way function, a public-key cryptosystem, and a digital signature scheme. Moreover, they presented a protocol, the so-called Diie-Hellman protocol, allowing two parties who share no secret information initially, to generate a mutual secret key. This ...

B-FOCAL CURVES OF BIHARMONIC B-GENERAL HELICES IN Heis

In this paper, we study B-focal curves of biharmonic B -general helices according to Bishop frame in the Heisenberg group Heis   Finally, we characterize the B-focal curves of biharmonic B- general helices in terms of Bishop frame in the Heisenberg group Heis