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Student volunteers from Thomas Nelson Community College biology classes spend their Saturday morning participating in International Coastal Cleanup day at Dandy Haven Marine in Hampton, VA on Oct 18, 2019.
Virginia Institute of Marine Science's Marine Advisory Program and Virginia Sea Grant are proud partners in the Virginia Clean Marina Program, which recognizes marinas that voluntarily take measures to prevent or reduce pollution at their facilities.
(Photo by Aileen Devlin | Virginia Sea Grant)
Governador Jerônimo Rodrigues e o presidente Lula, lançam o novo "Programa Minha Casa, Minha Vida" e entregam os residenciais Vida Nova Sacramento e Vida Nova Santo Amaro, no município de Santo Amaro.
Foto: Fernando Vivas/GOVBA
Here are some luggage tags I recieved at my introduction meeting for the Disney College Program. They aren
t really that interesting, but I just got my digital camera I am taking with me to Florida, so I'm trying it out.
University of Pennsylvania Forerunner Pre-orientation Program, Penn Wharton China Center, Beijing. July 11, 12, 2015. Photos by Kevin Pitt.
Members of the World Beat drumming group trace how traditional African music traveled the United States and influenced jazz and rock and roll music
So here's how it works:
> Turning the aperture ring raises the "Diaphragm Bar" behind the lens. At f/2.8 it's completely below the lens opening, and at f/22 it's just below the lens centerline.
> When the mirror rises, it drags this panel up with it; the odd shaped hole in the middle is the shutter opening. The mirror/shutter rises just as fast as its spring can whack it, and returns at the same speed as soon as it reaches the top.
> At f/2.8, the shutter is open for the entire distance of travel shown in green above - it takes about 1/60 second to cover this distance. But at f/22, with the DIaphragm Bar up where the purple line indicates, the shutter doesn't open until it reaches that line, and it closes as soon as it passes that line on the way down. The entire movement takes the same time as before, but the open time is only the time that it takes to travel the distance shown by the purple arrows. Assuming that the speed at f/2.8 was 1/60, this works out to about 1/500 second.
> The aperture at f/22 (and at all other settings except for f/2.8) is in the shape of a triangle with its point at the top - the top 2 sides are the edges of the "roof" part of the shutter opening, and the bottom side is provided by the Diaphragm bar.
It's actually just a little more complicated than this. In the above description, the f/22 opening is not centered on the same axis as the f/2.8 opening, and in fact if the Diaphragm Bar actually went as high as the purple line it would block off the center of the lens. So, in addition to all of the above, at the smaller apertures, the mirror/shutter is actually stopping its upward travel earlier than it does at full aperture. How does it do this? In the view of the Diaphragm Bar at www.flickr.com/photos/rick_oleson/53225547915/in/dateposted/, there is a second, gold colored bar that's coupled to the Diaphragm Bar, with a bent-up tab at its tip. As the Diaphragm Bar rises, this gold bar comes down - the tab at the end is the stop that the mirror strikes against to stop its upward travel. The two bars are coupled together so that the mirror's stopping position produces a centered triangular aperture opening at all settings. Dang.
Whoever did this will probably never be famous - but he was good.
The Recreation program office is located in the Annex Building, located at the end of Loop Road below the Undergraduate Building. Here, you can sign up for fun trips and workshops and rent equipment for an outdoor adventure.
Photo: Laura Dutelle
The van for the SFPD's teen fishing program, a Ford Transit Connect, (i think...) sits at an (you guessed it...) expired parking meter, waiting for the return of the participants from a fishing trip, in the Fisherman's Wharf area of San Francisco, CA. Taken by a Nikon D40x with a Nikon 18-55mm VR kit lens (at 18)
Canadian Army Sergeant Major, Chief Warrant Officer Alain Guimond, talks with members of the National Sentry Program about the the tasking they are on before they take their post at the national War Monument in Ottawa, Ontario on 1 November 2017.
Photo: Sgt D.G. Janes
Directorate of Army Public Affairs
school health program india by Trinity Care Foundation
Corporate Social Responsibility (CSR) has acquired new dimensions in the recent years. trinitycarefoundation.org/csrprogrammesindia
Trinity Care Foundation CSR Health Projects are www.flickr.com/photos/trinitycarefoundation/sets/
Programa del Salón del Cómic: Avándaro, la historia jamás contada, en la XXXII Feria Internacional del libro en Guadalajara, México. Participa: Luis Fernando. Sábado 01 de diciembre del 2018. ( © FIL/NABIL QUINTERO MILIÁN)
Commander Ray Leung's change of command, taking over as commanding officer of The World Famous SCREWTOPS from exiting Commander Mark Seip.
(I asked, and the "World Famous" designation was given many years ago and few others have the title. Pretty cool.)
The Thirtieth Session of WIPO’s Program and Budget Committee (PBC) took place in Geneva from July 8 to July 12, 2019.
Copyright: WIPO. Photo: Emmanuel Berrod. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License.
Teaching program in La Serena Chile: William Zeller is our latest volunteer in Chile, he is doing a 4 week program at one of our primary schools. He also is taking Spanish Lessons (4 hours a day), great work William, for what our local coordinator has told us the students will miss you once the program is over.
Blog Post : the-sky-calls.dreamwidth.org/119169.html
Craft File : kerbalx.com/CaptKordite/Ezeticolev-A108
KSP 1.11.2 + Kronal Vessel Viewer