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924 Matching Results
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Adiabatic following in two-photon transition
There has been much interest recently in coherent multiphoton transitions in many-level systems. The present work considers the effect of relaxation in the response of a three-level system to a smoothly varying, near-resonant, two-photon field. The relaxation-dependent contributions to the nonlinear refractive index are calculated. It is shown that the coherent interaction of two smoothly varying, near-resonant, two-photon pulses with a three-level system can be described by ''two-photon damped Bloch equations'' which are analogous to those for a one-photon transition in a two-level system except for the presence of a two-photon coupling and a frequency shift. 1 figure. (RWR)
Date:
January 1, 1977
Creator:
Nayfeh, M. H. & Nayfeh, A. H.
Object Type:
Article
System:
The UNT Digital Library
[Aerial Photograph of Lochwood Park #2]
Photograph of the aerial view of Lochwood Park and the surrounding suburban residential housing. Key features of the park include two tennis courts, a dirt baseball field, and playground equipment.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial Photograph of Lochwood Park #3]
Photograph of the aerial view of Lochwood Park and the surrounding suburban residential housing. Key features of the park include two tennis courts, a dirt baseball field, and playground equipment.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Anderson Bonner Park and Surrounding Area]
Photograph of Anderson Bonner Park and its surrounding area located in Dallas County, Texas. The park. Roads are shown an all sides of the park, while buildings are visible to the left and right sides of the picture.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Arapaho Park and Surrounding Area]
Photograph of Arapaho City and the surrounding area located in Dallas, Texas. The park is shown on a small block of land surrounded by several blocks of residential suburbs. At the bottom of the picture, a pond surrounded by trees is visible.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Arcadia Park and Surrounding Area]
Photograph of Arcadia Park and its surrounding area located in Dallas, Texas. The park makes up the majority of the photograph, and occupies area around Arcadia Drive, which extends from the center of the picture to the left side. A residential area is visible below the park, while some larger, similar buildings sit at the top.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Beeman Cemetery and Surrounding Area]
Photograph of Beeman Cemetery and its surrounding area located in Dallas, Texas. The cemetery, which has a memorial park to its right, sits on a block of land on the center and left of the photograph. Houses are visible below the cemetery and a living community is seen above.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Beeman Cemetery and Surrounding Area]
Photograph of Beeman cemetery and its surrounding area located in Dallas, Texas. The cemetery, which has a memorial park to its lower right, is located on the upper side of the picture. A residential suburb is seen below the memorial park, and Mingo Street and Dolphin Road outline the park on its lower and right sides respectively.
Date:
1977?
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Crawford Park and Surrounding Area]
Photograph of Crawford Park and its surrounding area in Dallas, Texas. The park, which contains part of Prairie Creek, sits above and to the right of U.S. Route 175 and a railroad, below Elam Road, and to the left of N Prairie Creek Road. Residential suburbs are visible along the right and top edges of the photograph.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Crestline Park and Surrounding Area]
Photograph of Crestline Park and its surrounding area in Dallas, Texas. The park sits directly above a house and to the left of Crestline Avenue. It is surrounded by residential suburbs, except for a school parking lot, which is visible near the top right corner of the picture.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of Crestline Park and Surrounding Area]
Photograph of Crestline Park and its surroundings in Dallas, Texas. The park sits directly to the left of Crestline Avenue and is surrounded by residential suburbs, except for a school parking lot, which is visible near the top right corner of the picture.
Date:
1977
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Aerial View of North Arcadia Park and Surrounding Area]
Photograph of North Arcadia Park and its surrounding area located in Dallas, Texas. A block of empty land sits in the center of the photograph, and is surrounded by partially tree-covered land to the bottom right and residential suburbs to the top left.
Date:
1977
Creator:
Haskins, Squire
Object Type:
Photograph
System:
The Portal to Texas History
Alpha scintillation radon counting. [Methods for measuring radioactivity around uranium mines]
Radon counting chambers which utilize the alpha-scintillation properties of silver activated zinc sulfide are simple to construct, have a high efficiency, and, with proper design, may be relatively insensitive to variations in the pressure or purity of the counter filling. Chambers which were constructed from glass, metal, or plastic in a wide variety of shapes and sizes were evaluated for the accuracy and the precision of the radon counting. The principles affecting the alpha-scintillation radon counting chamber design and an analytic system suitable for a large scale study of the /sup 222/Rn and /sup 226/Ra content of either air or other environmental samples are described. Particular note is taken of those factors which affect the accuracy and the precision of the method for monitoring radioactivity around uranium mines. (32 references)
Date:
January 1, 1977
Creator:
Lucas, H. F. Jr.
Object Type:
Article
System:
The UNT Digital Library
[Barbara C. Jordan Speech: Campaign 77 Luncheon]
Speech given by Barbara C. Jordan at a luncheon kicking off "Campaign 77," about the uniqueness of Texas Southern University.
Date:
1977~
Creator:
Jordan, Barbara C.
Object Type:
Text
System:
The Portal to Texas History
[Barbara Jordan and H. P. Carter]
Photograph of Barbara Jordan and H. P. Carter at the opening of the H. P. Carter Center. Jordan is wearing a white dress with a blue cover and Carter is wearing a light tan suit. They are standing at a podium, and there are chairs on the stage with them in the background.
Date:
1977~
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan and H. P. Carter]
Photograph of Barbara Jordan and H. P. Carter at the opening of the H. P. Carter Center. Jordan is wearing a white dress with a blue cover and Carter is wearing a light tan suit. They are standing at a podium, and there are chairs on the stage with them in the background.
Date:
1977~
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan and Jimmy Carter at a Picnic]
Photograph of Barbara Jordan and President Jimmy Carter at a White House Picnic. To the far right is Nancy Earl.
Date:
1977~
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan and Three Unidentified Persons]
Photograph of Barbara Jordan and three unidentified persons standing at Anzie T. Morton's swearing in ceremony. Jordan is wearing a black dress with a yellow cover, the man behind her is wearing a gray suit, the woman to the right of him is wearing a light blue dress, and the man next to her is wearing a light blue suit.
Date:
1977
Creator:
Ankers Capitol Photographers
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan and Three Unidentified Persons]
Photograph of Barbara Jordan and three unidentified persons standing at Anzie T. Morton's swearing in ceremony. Jordan is wearing a black dress with a yellow cover, the man next to her is wearing a gray suit, the woman to the right of him is wearing a light blue dress, and the man next to her is wearing a light blue suit.
Date:
1977
Creator:
Ankers Capitol Photographers
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan Scrapbook, December 1977 - February 1978]
Scrapbook containing newspaper clippings, texts, and photographs related to Senator Barbara Jordan.
Date:
1977
Creator:
unknown
Object Type:
Book
System:
The Portal to Texas History
[Barbara Jordan Scrapbook, October 1977 - September 1978]
Scrapbook containing newspaper clippings, texts, and photographs related to Senator Barbara Jordan.
Date:
1977
Creator:
unknown
Object Type:
Book
System:
The Portal to Texas History
[Barbara Jordan Speaks at Azie T. Morton's Swearing in Ceremony]
Photograph of Barbara Jordan speaking at Azie T. Morton's swearing in as US Treasurer. She is wearing a black dress with a yellow jacket, standing at a podium with the seal of the Treasury Department on the front, and visible from the chest up.
Date:
1977
Creator:
Ankers Capitol Photographers
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan Speaks at Azie T. Morton's Swearing in Ceremony]
Photograph of Barbara Jordan speaking at Azie T. Morton's swearing in as US Treasurer. She is wearing a black dress with a yellow jacket, standing at a podium with the seal of the Treasury Department on the front, and visible from the chest up.
Date:
1977
Creator:
Ankers Capitol Photographers
Object Type:
Photograph
System:
The Portal to Texas History
[Barbara Jordan Speaks at Azie T. Morton's Swearing in Ceremony]
Photograph of Barbara Jordan speaking at Azie T. Morton's swearing in as US Treasurer. She is wearing a black dress with a yellow jacket, standing at a podium with the seal of the Treasury Department on the front, and visible from the chest up.
Date:
1977
Creator:
Ankers Capitol Photographers
Object Type:
Photograph
System:
The Portal to Texas History