Over the Water: Douglas Hollis
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Mirrors Or Lenses) Can Produce an Image of the Object by 4.2 Mirrors Redirecting the Light
Object-Image • A physical object is usually observed by reflected light that diverges from the object. • An optical system (mirrors or lenses) can produce an image of the object by 4.2 Mirrors redirecting the light. • Images – Real Image • Image formation by mirrors – Virtual Image • Plane mirror • Curved mirrors. Real Image Virtual Image Optical System ing diverging erg converging diverging diverging div Object Object real Image Optical System virtual Image Light appears to come from the virtual image but does not Light passes through the real image pass through the virtual image Film at the position of the real image is exposed. Film at the position of the virtual image is not exposed. Each point on the image can be determined Image formed by a plane mirror. by tracing 2 rays from the object. B p q B’ Object Image The virtual image is formed directly behind the object image mirror. Light does not A pass through A’ the image mirror A virtual image is formed by a plane mirror at a distance q behind the mirror. q = -p 1 A mirror reverses front and back Parabolic Mirrors Optic Axis object mirror image mirror The mirror image is different from the object. The z direction is reversed in the mirror image. Parallel rays reflected by a parabolic mirror are focused at a point, called the Focal Point located on the optic axis. Your right hand is the mirror image of your left hand. Parabolic Reflector Spherical mirrors • Spherical mirrors can be used to form images • Spherical mirrors are much easier to fabricate than parabolic mirrors • A spherical mirror is an approximation of a parabolic mirror for small curvatures. -
Leandro Erlich: Towards a Collaborative Relationship Between Architecture and Art Isabel Tassara [email protected]
The University of San Francisco USF Scholarship: a digital repository @ Gleeson Library | Geschke Center Master's Projects and Capstones Theses, Dissertations, Capstones and Projects Winter 12-16-2016 Leandro Erlich: Towards A Collaborative Relationship Between Architecture and Art Isabel Tassara [email protected] Follow this and additional works at: https://repository.usfca.edu/capstone Part of the Architectural History and Criticism Commons, Contemporary Art Commons, Interior Architecture Commons, Modern Art and Architecture Commons, and the Museum Studies Commons Recommended Citation Tassara, Isabel, "Leandro Erlich: Towards A Collaborative Relationship Between Architecture and Art" (2016). Master's Projects and Capstones. 436. https://repository.usfca.edu/capstone/436 This Project/Capstone is brought to you for free and open access by the Theses, Dissertations, Capstones and Projects at USF Scholarship: a digital repository @ Gleeson Library | Geschke Center. It has been accepted for inclusion in Master's Projects and Capstones by an authorized administrator of USF Scholarship: a digital repository @ Gleeson Library | Geschke Center. For more information, please contact [email protected]. Leandro Erlich: Towards a Collaborative Relationship Between Architecture and Art Keywords: contemporary art, museum studies, architecture, interactive installation, international artist, art exhibition, Buenos Aires Argentina, Contemporary Jewish Museum by Isabel Tassara Capstone project submitted in partial FulFillment oF the requirements For -
On the Burning Mirrors of Archimedes, with Some Propositions Relating to the Concentration of Light Produced by Reectors of Different Forms
Transactions of the Royal Society of Edinburgh http://journals.cambridge.org/TRE Additional services for Transactions of the Royal Society of Edinburgh: Email alerts: Click here Subscriptions: Click here Commercial reprints: Click here Terms of use : Click here IV.—On the Burning Mirrors of Archimedes, with some Propositions relating to the concentration of Light produced by Reectors of different forms John Scott Transactions of the Royal Society of Edinburgh / Volume 25 / Issue 01 / January 1868, pp 123 - 149 DOI: 10.1017/S0080456800028143, Published online: 17 January 2013 Link to this article: http://journals.cambridge.org/abstract_S0080456800028143 How to cite this article: John Scott (1868). IV.—On the Burning Mirrors of Archimedes, with some Propositions relating to the concentration of Light produced by Reectors of different forms. Transactions of the Royal Society of Edinburgh, 25, pp 123-149 doi:10.1017/S0080456800028143 Request Permissions : Click here Downloaded from http://journals.cambridge.org/TRE, IP address: 129.93.16.3 on 13 Apr 2015 ( 123 ) IV.—On the Burning Mirrors of Archimedes, with some Propositions relating to the concentration of Light produced by Reflectors of different forms. By JOHN SCOTT, Esq., Tain. (Plate III.) (Bead 6th January 1868). As the reputed fact of ARCHIMEDES having burned the Roman ships engaged in the siege of Syracuse, by concentrating on them the solar rays, has not only been doubted but disbelieved by some of the most eminent scientific men, I shall briefly give the evidence on both sides. The burning of the ships of MARCELLUS is mentioned by most of the ancient writers who refer to the machines which ARCHIMEDES employed in the defence of his native city, and their statements have been repeated by succeeding authors, without any doubts having been expressed until comparatively recent times. -
100 Things to Do in San Francisco*
100 Things to Do in San Francisco* Explore Your New Campus & City MORNING 1. Wake up early and watch the sunrise from the top of Bernal Hill. (Bernal Heights) 2. Uncover antique treasures and designer deals at the Treasure Island Flea Market. (Treasure Island) 3. Go trail running in Glen Canyon Park. (Glen Park) 4. Swim in Aquatic Park. (Fisherman's Wharf) 5. Take visitors to Fort Point at the base of the Golden Gate Bridge, where Kim Novak attempted suicide in Hitchcock's Vertigo. (Marina) 6. Get Zen on Sundays with free yoga classes in Dolores Park. (Dolores Park) 7. Bring Your Own Big Wheel on Easter Sunday. (Potrero Hill) 8. Play tennis at the Alice Marble tennis courts. (Russian Hill) 9. Sip a cappuccino on the sidewalk while the cable car cruises by at Nook. (Nob Hill) 10. Take in the views from seldom-visited Ina Coolbrith Park and listen to the sounds of North Beach below. (Nob Hill) 11. Brave the line at the Swan Oyster Depot for fresh seafood. (Nob Hill) *Adapted from 7x7.com 12. Drive down one of the steepest streets in town - either 22nd between Vicksburg and Church (Noe Valley) or Filbert between Leavenworth and Hyde (Russian Hill). 13. Nosh on some goodies at Noe Valley Bakery then shop along 24th Street. (Noe Valley) 14. Play a round of 9 or 18 at the Presidio Golf Course. (Presidio) 15. Hike around Angel Island in spring when the wildflowers are blooming. 16. Dress up in a crazy costume and run or walk Bay to Breakers. -
Caliper Application Summary Report 20: LED PAR38 Lamps
Application Summary Report 20: LED PAR38 Lamps November 2012 Addendum September 2013 Prepared for: Solid-State Lighting Program Building Technologies Office Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared by: Pacific Northwest National Laboratory 1 Preface The U.S. Department of Energy (DOE) CALiPER program has been purchasing and testing general illumination solid-state lighting (SSL) products since 2006. CALiPER relies on standardized photometric testing (following the 1 Illuminating Engineering Society of North America [IES] approved method LM-79-08 ) conducted by accredited, 2 independent laboratories. Results from CALiPER testing are available to the public via detailed reports for each product or through summary reports, which assemble data from several product tests and provide comparative 3 analyses. It is not possible for CALiPER to test every SSL product on the market, especially given the rapidly growing variety of products and changing performance characteristics. Starting in 2012, each CALiPER summary report focuses on a single product type or application. Products are selected with the intent of capturing the current state of the market—a cross section ranging from expected low to high performing products with the bulk characterizing the average of the range. The selection does not represent a statistical sample of all available 4 products. To provide further context, CALiPER test results may be compared to data from LED Lighting Facts, 5 ™ ENERGY STAR® performance criteria, technical requirements for the DesignLights Consortium (DLC) Qualified 6 Products List (QPL), or other established benchmarks. CALiPER also tries to purchase conventional (i.e., non- SSL) products for comparison, but because the primary focus is SSL, the program can only test a limited number. -
Lise Autogena – the Sound Mirrors Project
Lise Autogena – The Sound Mirrors Project Listen to the sky : Standing silent and abandoned, a series of isolated and mysterious concrete structures line the south east coast of England. Known locally as “listening ears”, these structures, more properly called acoustic mirrors, are vestiges from great inter-war acoustic experiments that took place in both England and France - early warning systems against the possibility of an airborne invasion across the English Channel. The acoustic mirrors tilted their faces to the sky and collected sound in giant concrete dishes. They were operated by trained listeners that endured cold nights at their listening posts, entombed in concrete bunkers, or high on listening platforms in front of the mirrors, to pick up distant noises from the sky. The acoustic mirrors were never used in wartime - the invention of radar and the increasing speed of aeroplanes rendered them obsolete within ten years of their erection. Almost seventy years later, these now forgotten experiments have become the focus and the inspiration for a groundbreaking international art project - an attempt to re-invent this redundant technology for the 21st Century. Talk across the sea : In a project, which intertwines the remarkable origins of the historic mirrors with their presence today as poetic metaphors for cross-Channel relations, poised dramatically above the sea towards France - the artist Lise Autogena proposes to construct two new acoustic mirrors. One mirror will be placed in Folkestone, filling a gap in the existing chain of mirrors along the English coast. The other will be placed in Sangatte, on the coast of France, approximately 25 miles across the Channel. -
The Fine Arts Museums of San Francisco
Report of Independent Auditors and Combined Financial Statements The Fine Arts Museums of San Francisco June 30, 2018 (with comparative totals for the year ended June 30, 2017) Table of Contents REPORT OF INDEPENDENT AUDITORS ................................................................................................................ 1 COMBINED FINANCIAL STATEMENT Combined Statement of Financial Position .......................................................................................................... 4 Combined Statement of Unrestricted Revenues, Expenses, and Other Changes in Unrestricted Net Assets ............................................................................................................................................................ 5 Combined Statement of Changes in Net Assets.................................................................................................. 6 Combined Statement of Cash Flows ................................................................................................................... 7 Notes to Combined Financial Statements ............................................................................................................ 8 Report of Independent Auditors To the Boards of Trustees Corporation of the Fine Arts Museums and Fine Arts Museums Foundation Report on the Combined Financial Statements We have audited the accompanying combined financial statements of the Corporation of the Fine Arts Museums and the Fine Arts Museums Foundation (collectively the “Fine -
20181017 Consent Calendar 1-3
Mural Design Information Form LEAD ARTIST ADDRESS CITY STATE ZIP CODE EMAIL PHONE PROJECT COORDINATOR ADDRESS CITY STATE ZIP CODE EMAIL PHONE SPONSORING ORGANIZATION ADDRESS CITY STATE ZIP CODE EMAIL PHONE FUNDING SOURCES PROPOSED SITE (address, cross street ) DISTRICT District numbers can be found at http://sfgov.org/elections/district-citywide-maps MURAL TITLE DIMENSIONS ESTIMATED SCHEDULE (start and completion dates) 1. Proposal (describe proposed design, site and theme. Attach a separate document if needed). 2. Materials and processes to be used for wall preparation, mural creation and anti-graffiti treatment. 3. List individuals and groups involved in the mural design, preparation and implementation. Attach the following documents to this form: 1. Lead artist's resume/qualifications and examples of previous work 2. Three (3) letters of community support 3. Letter or resolution approving proposal from city department or; 4. Letter of approval from private property owner along with Property Owner Authorization Form 5. Signed Artist Waiver of Property Rights for artwork placed upon city property or; 6. Signed Artist Waiver of Proprietary Rights financed in whole or in part by city funds for artwork placed upon private property 7. Maintenance Plan (including parties responsible for maintenance) 8. Color image of design 9. One image of the proposed site and indicate mural dimensions YUKA EZOE www.YukakoEzoe.com SAN FRANCISCO, CA EDUCATION 2005 Garret Rietveld Academy of Arts, Amsterdam, Netherlands (spring session) 2006 BFA in Interdisciplinary Art, San Francisco Art Institute, San Francisco, CA 2008 Women’s Initiative, San Francisco, CA, a small business development NPO PROFESSIONAL EXPERIENCE Precita Eyes Muralists Association, Inc. -
050-057 Q7-32Sb.Pdf
048 BREAKING THE WAVES A stretch of ‘desert’ along the Kent coast, Dungeness was once the base for a primitive form of radar. What better way to visit than in a radar-equipped Audi Q7? WRITER John Silcox PHOTOGRAPHER Richard Pardon Audi Magazine 049 the estate – and he is an encyclopaedia of local knowledge. ‘You wouldn’t think so but the sound mirrors are easy to miss, even though one is more than 200ft long,’ he says. ‘Nowadays they are slowly being overrun by the overgrowth and despite our best preservation efforts the bushes are slowly taking back control of the area. Before long I wouldn’t be surprised if the sound mirrors were relegated to the confines of history books.’ We follow Owen along a dirt track and soon we’re staring up at three giant decaying concrete structures: two parabolic dishes and one enormous curved wall. Even today, these buildings are still incredibly impressive and tower above the landscape, standing nearly 30ft tall. However, their state of disrepair is evident: the harsh weather of the location has taken its toll on the stained mortar, and chunks have crumbled away. ‘In the 1930s these were at the forefront of technology,’ explains Owen. ‘Sound mirrors were an early military experiment in ranging and detection, and it was thought they would be the best way to give early warning of an air raid. Instead of using electric wave signals like radar does now, these sound mirrors were based on acoustics. Dungeness was the perfect spot for these to work as it was empty and nice and quiet. -
(FAMSF) Health and Safety Plan
Fine Arts Museums of San Francisco (FAMSF) Health and Safety Plan Business Name: Fine Arts Museums of San Francisco Address: de Young, 50 Hagiwara Tea Garden Drive, San Francisco CA 94118 You may contact the following person with any questions or comments about this plan: Name: Susan McConkey Phone number: 415-750-8901 Email: [email protected] Worksite Safety Plan Monitor contact information: Name: Christine Moss Phone Number: 415-750-7684 Email: [email protected] Permanent URL for this plan: https://deyoung.famsf.org/sites/default/files/famsf_health_and_safety_plan_september_2020.pdf Introduction This document describes the steps FAMSF has taken to address each of the items as required in the City and County of San Francisco Guidance and Plan Template for Indoor Museums, Zoos, and Aquariums, per Health Order C-1 issued September 14, 2020. We have met and exceeded the requirements including the following: ● Planning and managing our capacity to not exceed 25 percent at any time. ● Requiring face coverings by staff and visitors at all times. ● Reviewing and posting the applicable provisions of the Social Distancing Protocol, including advising visitors to not enter the museums if they have symptoms of COVID-19, or in the past 14 days have been diagnosed with COVID-19 or have been in close contact with a person who has been diagnosed with COVID-19. ● Posting signage throughout all public and staff areas of the museums regarding social distancing, mask wearing, importance of handwashing, etc. To ensure steady movement -
San Francisco San Francisco Art Trips Can Create Lifelong Memories for Your Students
TOP ART DESTINATIONS: San Francisco San Francisco art trips can create lifelong memories for your students. Educational Destinations offers a variety of San Francisco art trips opportunities. If your students are ready to explore the modern and contemporary art at the San Francisco Museum of Modern Art, discover the stunning fine art of the M. H. de Young Memorial Museum, or view the breathtaking spectrum of Asian art and culture at the Asian Art Museum, Educational Destinations can make your San Francisco art trip rewarding and memorable. EDUCATIONAL ART OPPORTUNITIES: • Campus Tours • Gilding Workshops • Woodworking Classes • Guided Art Tours • Botanical Painting • Encaustic Painting Classes • Special Guest Instructors • Abstract Workshops • Clay Workshops • Art Presentations • Impressionist Landscape • Learning How to Sell Art • Ephemeral Art Experiences Courses • Experimental Drawing • Watercolor Workshops • Drawing Workshops Workshops • Comics/Illustrations • Perspective Workshops • Sstill Life Workshops Workshops • Painting (Acrylics, Oils) • Figure Workshops • Graphic Design Classes Workshops • Sculpture Workshops • Fashion Design Courses • Sculpture Workshops • Portraiture Workshops • Stenciling Workshops • Printmaking Workshops ART ATTRACTIONS: • Stanford University Clinics • Bailey Art Museum • 3 Fish Studios • San Francisco Art Institute • 16th Avenue Staircase • SOMArts Cultural Center • San Francisco Museum of • Exploratorium • Root Division Modern Art • Museum of 3D Illusions • Balmy Alley • Clarion Alley • Minnesota Street -
The Cassegrain Antenna
The Cassegrain Antenna Principle of a Cassegrain telescope: a convex secondary reflector is located at a concave primary reflector. Figure 1: Principle of a Cassegrain telescope Sieur Guillaume Cassegrain was a French sculptor who invented a form of reflecting telescope. A Cassegrain telescope consists of primary and secondary reflecting mirrors. In a traditional reflecting telescope, light is reflected from the primary mirror up to the eye-piece and out the side the telescope body. In a Cassegrain telescope, there is a hole in the primary mirror. Light enters through the aperture to the primary mirror and is reflected back up to the secondary mirror. The viewer then peers through the hole in the primary reflecting mirror to see the image. A Cassegray antenna used in a fire-control radar. Figure 2: A Cassegray antenna used in a fire-control radar. In telecommunication and radar use, a Cassegrain antenna is an antenna in which the feed radiator is mounted at or near the surface of a concave main reflector and is aimed at a convex subreflector. Both reflectors have a common focal point. Energy from the feed unit (a feed horn mostly) illuminates the secondary reflector, which reflects it back to the main reflector, which then forms the desired forward beam. Advantages Disadvantage: The subreflectors of a Cassegrain type antenna are fixed by bars. These bars The feed radiator is more easily and the secondary reflector constitute supported and the antenna is an obstruction for the rays coming geometrically compact from the primary reflector in the most effective direction. It provides minimum losses as the receiver can be mounted directly near the horn.