Low energy ionization of argon atoms by argon atoms

Ionization cross section for production of electrons by collisions between neutral argon atom

Space processing of crystals for opto-electronic devices: The case for solution growth

The results obtained during a six month program aimed at determining the viability of space processing in the 1980's of dielectric-elastic-magnetic single crystals were described. The results of this program included: identification of some important emerging technologies dependent on dielectric-elastic-magnetic crystals, identification of the impact of intrinsic properties and defects in the single crystals on system performance, determination of a sensible common basis for the many crystals of this class, and identification of the benefits of micro-gravity and some initial experimental evidence that these benefits can be realized in space. It is concluded that advanced computers and optical communications are at a development stage for high demand of dielectric-elastic-magnetic single crystals in the mid-1980's. Their high unit cost and promise for significantly increased perfection by growth in space justified pursuit of space processing

Design guide for helicopter transmission seals

A detailed approach for the selection and design of seals for helicopter transmissions is presented. There are two major types of seals presently being used and they are lip type seals and mechanical type seals. Lip type seals can be divided in conventional lip seals and hydrodynamic lip seals. Conventional lip seals can be used for slow-speed, low-pressure, low-temperature sealing. Hydrodynamic lip seals although they are as pressure and temperature limited as conventional lip seals, can operate at a higher speed. Mechanical types seals are comprised of face seals and circumferential seals. Face seals are capable of high speed, high pressure, and high temperature. Circumferential seals can be used in high-speed and high-temperature applications, but will leak excessively at moderate pressures. The performance goals of transmission seals are a life that is at least equal to the scheduled overhaul interval of the gearbox component and a leakage rate of near zero

A content analysis of Backpage.com advertisements in Louisville, Kentucky

Backpage.com and Craigslist are replacing the street corner as a crime source for buying and selling of sex. “To reduce commercial sexual exploitation and enforce existing trafficking laws, communities must first recognize the extent of the problem within their local area (Janson, Mann, Marro, & Matvey, 2013, 99). In a population density study conducted in 15 major U. S. cities, it was found that males over 18 years of age who buy sex online ranged from 0.6% in San Francisco to 21.4% in Houston (Roe-Sepoqitz, Hickle, Gallagher, Smith, & Hedberg, 2013). Researchers in the Greater Cincinnati area found a high demand for online sex trafficking relative to the interstate highway system in the region (The Imagine Foundation, 2014). A survey of Kentucky professionals with at-risk youth found that 33% of traffickers used Craigslist or social media for recruiting (Cole & Anderson, 2013). This current study asks the question: “To what extent does online consumer sex trafficking exist in the Louisville and Lexington Kentucky area?” From June 2013 through May 31, 2014, graduate students at the University of Louisville conducted a daily review of the backpage.com advertisements for components of sex trafficking. In particular the links for Louisville and Lexington Kentucky were examined. The Kentucky Rescue and Restore Victims of Human Trafficking Task Force supported the study. A qualitative content analysis was conducted of verbiage. Photos were examined. The advertisements were also scanned for upcoming major events such as: The Street Hot Rod Nationals, The Governor’s Local Issues Conference, The Kentucky State Fair, The Livestock Expo, the Farm Machinery Show, and the Kentucky Derby. Major takeaways include an understanding to raise awareness that online sex trafficking exists in mid-size cities and related highway corridors, assistance of community leaders is needed, training of law enforcement is imperative, and resources for victims are essential

The African-American Business Tradition in Boston

African Americans in Boston have been exhibiting their interest and talents in business for a long time. Those in business today are continuing a tradition that goes back to the African culture of preslavery days. Enslaved Africans who were brought to America came from a business tradition, from a culture of great traders, merchants, and craftsmen. Many enslaved blacks, in fact, purchased their freedom by marketing their skilled services and handmade products