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Articles 12691 - 12720 of 20102

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Mass Deficits, Stalling Radii, And The Merger Histories Of Elliptical Galaxies, David Merritt May 2006

Mass Deficits, Stalling Radii, And The Merger Histories Of Elliptical Galaxies, David Merritt

Articles

A binary supermassive black hole leaves an imprint on a galactic nucleus in the form of a “mass deficit,” a decrease in the mass of the nucleus due to ejection of stars by the binary. The magnitude of the mass deficit is in principle related to the galaxy’s merger history, but the relation has never been quantified. Here, highaccuracy N-body simulations are used to calibrate this relation. Mass deficits are shown to be Mde f ≈ 0.5M12, with M12 the total mass of the binary; the coefficient in this relation depends only weakly on M2/M1 or on the galaxy’s pre-existing …

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A Fundamental Relation Between Compact Stellar Nuclei, Supermassive Black Holes, And Their Host Galaxies, Laura Ferrarese, Patrick Côté, Elena Dalla Bontà, David Merritt, Et Al. May 2006

A Fundamental Relation Between Compact Stellar Nuclei, Supermassive Black Holes, And Their Host Galaxies, Laura Ferrarese, Patrick Côté, Elena Dalla Bontà, David Merritt, Et Al.

Articles

Imaging surveys with the Hubble Space Telescope (HST) have shown that 50–80% of low- and intermediate-luminosity galaxies contain a compact stellar nucleus at their center, regardless of host galaxy morphological type. We combine HST imaging for early-type galaxies from the ACS Virgo Cluster Survey with ground-based long-slit spectra from KPNO to show that the masses of compact stellar nuclei in Virgo Cluster galaxies obey a tight correlation with the masses of the host galaxies. The same correlation is obeyed by the supermassive black holes (SBHs) found in predominantly massive galaxies. The compact stellar nuclei in the Local Group galaxies M33 …

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A New Eccentric Geomagnetic Dipole To Give The Correct Dip Pole Locations, Annraoi De Paor, Ted Burke May 2006

A New Eccentric Geomagnetic Dipole To Give The Correct Dip Pole Locations, Annraoi De Paor, Ted Burke

Articles

In this paper, we describe a new eccentric dipole model of the Earth’s magnetic field. The constraints under which the conventional eccentric dipole model is defined result in predicted dip pole locations that differ significantly from the measured locations. Here, we give a preliminary exposition of a new dipole model which, because it is constrained by the observed dip pole locations, overcomes this problem.

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Don't Go There: When To Abandon Lesson Plans And Venture, Humbly, Into Ground Zero, Sue Norton May 2006

Don't Go There: When To Abandon Lesson Plans And Venture, Humbly, Into Ground Zero, Sue Norton

Articles

This paper discusses pedagogical styles that are appropriate in the classroom.

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Note: Computation Of The Ramsey Number R(W5,K5), Stanislaw Radziszowski, Josh Stinehour, Kung-Kuen Tse May 2006

Note: Computation Of The Ramsey Number R(W5,K5), Stanislaw Radziszowski, Josh Stinehour, Kung-Kuen Tse

Articles

We determine the value of the Ramsey number R(W5;K5) to be 27, where W5 = K1 + C4 is the 4-spoked wheel of order 5. This solves one of the four remaining open cases in the tables given in 1989 by George R. T. Hendry, which included the Ramsey numbers R(G;H) for all pairs of graphs G and H having ve vertices, except seven entries. In addition, we show that there exists a unique up to isomorphism critical Ramsey graph for W5 versus K5. Our results are based on computer algorithms.

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Liberalism, Normative Expectations, And The Mechanics Of Fault, Kyron J. Huigens May 2006

Liberalism, Normative Expectations, And The Mechanics Of Fault, Kyron J. Huigens

Articles

No abstract provided.

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Lost In Translation: Words And Buildings, Noel Brady May 2006

Lost In Translation: Words And Buildings, Noel Brady

Articles

Review of book; Words & buildings - a vocabulary of modern architecture, by Adrian Forty

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Camera For Photofinish Photography At Racetracks, Andrew Davidhazy Apr 2006

Camera For Photofinish Photography At Racetracks, Andrew Davidhazy

Articles

Text that was handed out along with a demonstration of a Polaroid camera that was modified for strip photography and in this case used to photograph racecars running down an inclined ramp during a demo at some conference in the past. Diagram of modified camera included.

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Photographic Scanning, Or "Strip" Photography, With A Polaroid Camera, Andrew Davidhazy Apr 2006

Photographic Scanning, Or "Strip" Photography, With A Polaroid Camera, Andrew Davidhazy

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Preprint: https://ritdml.rit.edu/dspace/handle/1850/1663 A shorter and more up to date version of another article (instant strip) describing how to modify a Polaroid camera for strip photography. This article was intended for a high school audience.

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Synchroballistic Photography, Andrew Davidhazy Apr 2006

Synchroballistic Photography, Andrew Davidhazy

Articles

Text that was handed out along with a demonstration of a Polaroid camera adapted to operate as a strip camera and used to photograph a model rocket transported by a carriage driven back and forth by a screw lead.

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The Making Of A "New" Multipurpose Stereo Camera, Andrew Davidhazy Apr 2006

The Making Of A "New" Multipurpose Stereo Camera, Andrew Davidhazy

Articles

How a stereo camera using 4x5 film and based on surplus Wollensak stereo camera lens boards was constructed and the reasons why.

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...Some Ideas Related To Playing With A Couple Of Mirrors, Andrew Davidhazy Apr 2006

...Some Ideas Related To Playing With A Couple Of Mirrors, Andrew Davidhazy

Articles

Just some ideas on how to use mirrors for "fun" effects such as kaleidoscopic photography and using them in front of a camera or within or in front of an enlarger or copystand.

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Instant Strip Photography, Andrew Davidhazy Apr 2006

Instant Strip Photography, Andrew Davidhazy

Articles

||Postprint: https://ritdml.rit.edu/dspace/handle/1850/1690 Making strip cameras out of Polaroid pack-film type cameras.

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Photographing Wasps In Free Flight, Andrew Davidhazy Apr 2006

Photographing Wasps In Free Flight, Andrew Davidhazy

Articles

How to set up a system to photograph flying insects at close range and automatically using a cross-beam sync trigger and fast acting capping shutter.

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Tailflash Synchronizers For Action Photography, Andrew Davidhazy Apr 2006

Tailflash Synchronizers For Action Photography, Andrew Davidhazy

Articles

Theory, discussion and circuits suitable for use with leaf-shutter cameras for setting of a flash at the end of an exposure for combined flash/tungsten action photography.

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Ultraviolet And Infrared Photography Summarized, Andrew Davidhazy Apr 2006

Ultraviolet And Infrared Photography Summarized, Andrew Davidhazy

Articles

A short, sort of "by the numbers", summary of theory and practice of infrared and ultraviolet photography.

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Basics Of Strip Photography, Andrew Davidhazy Apr 2006

Basics Of Strip Photography, Andrew Davidhazy

Articles

An introduction to strip or scanning photography and how to adapt regular 35mm cameras for this purpose and apply them to photofinish and peripheral photography.

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A Different Approach To Panoramic Photography, Andrew Davidhazy Apr 2006

A Different Approach To Panoramic Photography, Andrew Davidhazy

Articles

Conical or circular strip scanning. This is another folksy description of how a strip camera with film revolving behind a slit-aperture was designed and used for novel panoramic and peripheral images.

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Slit-Scan Photography, Andrew Davidhazy Apr 2006

Slit-Scan Photography, Andrew Davidhazy

Articles

Slit-scan photography is the inverse of strip photography and exposure occurs just as with Focal plane shutter cameras but under more controlled conditions. Slit-scan photography exploits focal plane shutter distortion. This article explains theory and application of this unusual technique.

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Improved Rewound Film Retriever, Andrew Davidhazy Apr 2006

Improved Rewound Film Retriever, Andrew Davidhazy

Articles

How to make a film retriever out of scrap 35mm film useful for those times you rewound the film back into the cassette but wish to pull it back out for some reason or another.

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Making An Improvised Infrared Transmitting Filter, Andrew Davidhazy Apr 2006

Making An Improvised Infrared Transmitting Filter, Andrew Davidhazy

Articles

A brief note on how to make an improvised IR filter particularly suitable for use over light sources such as flashes. Spectral transmittance curves included.

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Photoinstrumentation On The Range: A Laboratory Simulation For Postsecondary Education, Andrew Davidhazy Apr 2006

Photoinstrumentation On The Range: A Laboratory Simulation For Postsecondary Education, Andrew Davidhazy

Articles

Students were involved first hand in a simulation of events patterned after those at the White Sands Missile Range during the launch and photography of a missile. A special, but simplified photographic apparatus was used to record flight data. The purpose of the project was to emphasize the important role that photography plays in the acquisition of data and to expose the students to a quantitive application of photography. Cooperation, trust in fellow students and teamwork were an integral part of the project. Career opportunities in the photoinstrumentation field were also discussed.

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Calibrating Your Shutters, Andrew Davidhazy Apr 2006

Calibrating Your Shutters, Andrew Davidhazy

Articles

Article that describes simple techniques to testing shutters particularly useful in the classroom. Although basic in principle these methods can be elaborated into significant problems.

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Principles Of Technical Photography And Photoinstrumentation, Andrew Davidhazy Apr 2006

Principles Of Technical Photography And Photoinstrumentation, Andrew Davidhazy

Articles

A brief review of fundamental image formation principles, camera systems, and special cameras and imaging techniques used in scientific, technical and instrumentation photography for the purpose of visualizing otherwise invisible events or to make measurements of such events. The article describes in brief how the various systems work and the technology that makes their operation possible.

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Undercover 35, Andrew Davidhazy Apr 2006

Undercover 35, Andrew Davidhazy

Articles

This is a brief article that was published in the Ilford Newsletter for Photo Educators and it deals with adapting the Lubitel for use with 35mm film to obtain unusual aspect ratio photos that incorporate 35mm artifacts.

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Color Interpretation: A Function Of Process & Film, Michael Peres Apr 2006

Color Interpretation: A Function Of Process & Film, Michael Peres

Articles

Characteristics of modern color emulsions are reviewed and summarized by Professor Michael Peres particularly for Biomedical applications but expandable to other situations as well.

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Applications Of Slow And Fast Streak Recording Cameras, Andrew Davidhazy Apr 2006

Applications Of Slow And Fast Streak Recording Cameras, Andrew Davidhazy

Articles

This paper deals with two applications of streak photography in everyday industrial and biological research and development endeavors. In each instance, the simplicity and low cost with which the data could be reduced to useful information and the ease with which it could be communicated to other technical personnel was an important side benefit. In the first case, a laboratory built rotating drum streak camera with a 12" circumference, was used to study the performance of the new Olympus F-280 flash on an Olympus OM-4T camera. The strobing frequency, starting characteristics, duration under manual and camera control, flash relationship to …

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Efficient Merger Of Binary Supermassive Black Holes In Non-Axisymmetric Galaxies, Peter Berczik, David Merritt, Rainer Spurzem, Hans-Peter Bischof Apr 2006

Efficient Merger Of Binary Supermassive Black Holes In Non-Axisymmetric Galaxies, Peter Berczik, David Merritt, Rainer Spurzem, Hans-Peter Bischof

Articles

Binary supermassive black holes form naturally in galaxy mergers, but their long-termevolution is uncertain. In spherical galaxies, N-body simulations show that binary evolution stalls at separations much too large for significant emission of gravitational waves (the “final parsec problem”). Here, we follow the long-term evolution of a massive binary in more realistic, triaxial and rotating galaxy models. We find that the binary does not stall. The binary hardening rates that we observe are sufficient to allow complete coalescence of binary SBHs in 10 Gyr or less, even in the absence of collisional loss-cone refilling or gas-dynamical torques, thus providing a …

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Basics Of Strip Enlargers, Andrew Davidhazy Apr 2006

Basics Of Strip Enlargers, Andrew Davidhazy

Articles

Enlarging long negatives produced by rotating panoramic cameras capable of 360 degree coverage, as well as photofinish and peripheral cameras is a problem because of their size. This article describes the design and construction of an enlarger capable of making prints hundreds of feet long.

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Preparation Of Technical Reports, Ronald Francis Apr 2006

Preparation Of Technical Reports, Ronald Francis

Articles

This is a brief article that was prepared and distributed to his students by the late Dr. Ronald Francis, of the Photographic Science department in the School of Photographic Arts and Sciences at RIT. It is included here in his memory and to continue to serve students of photographic sciences into the future.

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