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On April 22, 14 girls and two coaches from Brazil who are a part of "Las Estrellas," a sports, leadership and English program, came to Knoxville, TN as part of the U.S. Department of State Empowering Women and Girls through Sports Initiative. After the first day, they had already experienced University culture by participating in Dr. Ashleigh Huffman's Service-Learning class and eating in the cafeteria.
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 Thirty-Third Session of WIPO’s Program and Budget Committee (PBC) took place in Geneva from September 13 to September 17, 2021 in hybrid form – with delegates and observers attending physically in Geneva, Switzerland, and via remote participation from around the world.
Copyright: WIPO. Photo: Emmanuel Berrod. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License.
The FIU Accounting Bridge program is a 2-day summer program for selected college-bound students. During the 2 days participants will have the opportunity to meet professionals who studied in accounting and now have lucrative, secure, and fascinating jobs.
Stencil for the graphic representation of Computer Programs
1960s or 1970s
Scanned with Canon LIDE110
© Dirk HR Spennemann 2014, All Rights Reserved
Access all my images via the Collections Page
Touring production of The NationalTheatre and The Bristol Old Vic. -1989 -with Edward Petherbridge and Sian Thomas
Jean Kellogg, Merola Executive Director, Joan Kelly, James Kelly
Spring Benefit Gala 2015
A Waltz Down the Blue Danube
Photography by Kristen Loken
Purple wedding program on purple mums
Ceremony
Colonial Avenue Baptist Church
Roanoke, Virginia
Reception
Holiday Inn Valley View
Roanoke Virginia
Wedding Coordination
Diamond Events
Stephanie Hughes
540-558-8143
DJ
RSP Entertainment
Photographer
Bert Reed Photography
Florist
Petal Pushers
Cake Baker
Kelly Cakes
Susan Kelly
(540) 977-5349
This is what I'm doing at work for the last 2 weeks, coding and coding.
Esto es lo que estoy haciendo en el curro estas últimas 2 semanas, picar y picar codigo
The 2012 U.S. Synchronized Skating Championships hosted by The Skating Club of Boston and Team Excel
Associate Professor of Physics Barbara Walden, Emily Kaufman '18, Mattea Bennet '17, Jitty Synn '19, Sophia Gourley '19, Ardyn Allessie '19. Photo by John Marinelli
Second version of the PF powered train, controlled by an Mindstorms EV3.
In the previous version, it was not possible to access the charging plug at all. Making it impossible to recharge the battery.
In this version, this problem has been solved. The access to the charging plug is now under the easy-to-remove roof of the train.
In this photo you see the power cable connected.
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 19, 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)
2023 Firestone Grand Prix of St. Petersburg Presented by RP Funding
Streets of St. Petersburg - St. Petersburg, FL
NTT IndyCar Series / SRO GT America / Road to Indy / MX-5 Cup
*This was from a digital-only version of the program as real copies were not produced.
#TurismoPaulista O Programa de Governança e Gestão de Projetos Turísticos, uma parceria entre a APRECESP- Turismo Paulista e o Senac SP, teve inicio nesta semana. O curso está sendo realizado em quatro polos do Senac, em Ribeirão Preto, São Paulo (Aclimação) , Jundiaí e Taubaté.
O tema do primeiro módulo foi “Governança no Turismo”, o curso ainda conta com os seguintes temas “Elaboração de Projetos Prioritários no Turismo”, “Gestão de Projetos do Turismo” e “Entrega e Sistematização de Registro Final”.
No total, serão 104 horas de curso, 56 horas de carga horária presencial e outras 48 horas de aulas virtuais.
As fotos a seguir são do módulo “Governança do Turismo”, realizado no dia 28/05, no Senac Aclimação, com a presença de representantes das seguintes estâncias: Cananéia, Eldorado, Guarujá, Iguape, Ilha Comprida, Itanhaém, Mongaguá, Ribeirão Pires, Poá e São Roque.
Marblehead, Massachusetts
"Eastern Yacht Club has offered a Jr. Sailing Program for the past 15+ years. The program's objective is to introduce our members' children between the ages of 5 and 9 to sailing in a safe, fun environment."
northshorekid.com/camp/eastern-point-yacht-club-junior-sa...