recipient of the National Academy of Sciences William and Katherine Estes Award in 2015, for his pioneering work addressing the risks of nuclear weapons and the causes of nuclear proliferation. The award, which is granted triennially, recognizes "research in any field of cognitive or behavioral science that advances understanding of issues relating to the risk of nuclear war." In 2013, Sagan received the International Studies Association's International Security Studies Section Distinguished Scholar Award.  Sagan has also won four teaching awards: the Monterey Institute for International Studies' 2009 Outstanding Contribution to Nonproliferation Education Award; the International Studies Association's 2008 Deborah Misty Gerner Innovative Teaching Award; Stanford University's 1998-99 Dean's Award for Distinguished Teaching; and Stanford University's 1996 Laurance and Naomi Hoagland Prize for Undergraduate Teaching. He teaches acircuit diagram, this pin is represented by a first shunt-connected positive capacitance C1 at the waveguide.
However, from German patent document DE 33 10 531 A1, slot antenna elements are also known, in which case the waveguide is frequently provided with a ridge extending on the inside at the wall opposite the slot in the longitudinal direction of the waveguide.
In the special case of a symmetrically constructed rectangular ridge waveguide (in which a slot extending in the longitudinal direction of the waveguide as well as a ridge are arranged in the center with respect to the cross dimension of the waveguide), the above-mentioned pin made of a conductive material is a necessary means for exciting the emission of the waveguide wave from the slot. The operating principle consists of