An efficient x-ray lens with an effective speed of order less than approximately f/50 for lambda greater than approximately 10 A x-rays is described. Fabrication of this lensing element appears feasible using existing microfabrication technology. Diffraction and refraction are coupled in a single element to achieve efficient x-ray concentration into a single order focal spot. Diffraction is used to produce efficient ray bending (without absorption) while refraction is used only to provide appropriate phase adjustment among the various diffraction orders to insure what is essentially a single order output. The mechanism for ray bending (diffraction) is decoupled from the absorption mechanism. Refraction is used only to achieve small shifts in phase so that the associated attenuation need not be prohibitive. The x-ray lens might be described as a Blazed Fresnel Phase Plate (BFPP) with a spatially distributed phase shift within each Fresnel zone. The spatial distribution of the phase shifts is chosen to concentrate essentially all of the unabsorbed energy into a single focal spot. The BFPP transforms the incident plane wave into a converging spherical wave having an amplitude modulation which is periodic in r/sup 2/. As a result of the periodic amplitude modulation, the BFPP will diffract energy …

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Rapt conference participants ponder the challenges posed by future economic growth in Oklahoma."

Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Oklahoma State Fair 1977"

Photograph used for a story in the Oklahoma Times newspaper. Caption: "This architectural drawing by the Oklahoma City firm of Locke, Wright and Foster Architects and planners shows design at new fire stations to be built under a $657,500 in bond issue funds passed in 1974."

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, John L. Hill, regarding a legal question submitted for clarification; Disposition of interest from the Employees Life, Accident and Health Insurance and Benefits Fund Account.

Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Bandera, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "An idle windmill appears stark against a background of blowing dust south of Taloga in Dewey County."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Jennifer Nation, 5, rides her bicycle down a make believe street at Crossroads Mall during a two-day Safety City program. Lessons are being offered today and Saturday in the miniature city."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dr. Findlay Russell, one of the foremost experts on snake bites and toxic venoms, explains snakebite procedures with help from a stuffed western diamondback rattlesnake."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Playing on Stanford tennis teams that included the likes of Roscoe Tanner and Sandy Mayner, Bill Rompf became accustomed to winning."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "They start them young in Moore, and already 16-month-old Joseph Pempin is so disgusted he has about decided to throw the ball away."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Mrs. Sany Smith helps 10 month old twin daughters Ashley and carrier get ready for a ride on a twin toys."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Paul Thomas"

Weekly newspaper from Cotulla, Texas that includes local, state, and national news along with advertising.

Letter from Alan Cranston to Charlyne Creger explaining that he recognizes the services provided by the Women Airforce Service Pilots(U.S.) during World War II. He also states that the U.S. Senate is working with the U.S. House of Representatives Committees on Veterans Affairs to extend the benefits held by veterans to WASPs as well.

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

A letter from Dr. H. Louise Young and Vivienne B. Armstrong urging Jim Mattox and James Collins urging to support the LGBT community as a civil rights movement. The last documents are articles pertaining to the gay and lesbian leaders involving themselves in politics and a page of the Dallas Gay Political Caucus treasurer's report.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.