A comparative study of soviet versus western helicopters. Part 2: Evaluation of weight, maintainability and design aspects of major components

A detailed comparative insight into design and operational philosophies of Soviet vs. Western helicopters is provided. This is accomplished by examining conceptual approaches, productibility and maintainability, and weight trends/prediction methodology. Extensive use of Soviet methodology (Tishchenko) to various weight classes of helicopters is compared to the results of using Western based methodology

The 1980 land cover for the Puget Sound region

Both LANDSAT imagery and the video information communications and retrieval software were used to develop a land cover classifiction of the Puget Sound of Washington. Planning agencies within the region were provided with a highly accurate land cover map registered to the 1980 census tracts which could subsequently be incorporated as one data layer in a multi-layer data base. Many historical activities related to previous land cover mapping studies conducted in the Puget Sound region are summarized. Valuable insight into conducting a project with a large community of users and in establishing user confidence in a multi-purpose land cover map derived from LANDSAT is provided

Structural Geology of the Brentwood-St. Paul Area, Northwest Arkansas

Photogeologic and field mapping of a 530 mi² area in southeastern Washington and southern Madison Counties, Arkansas, indicates that post-Atoka structural deformation occurred primarily through differential uplift of basement fault blocks. Northeast and east trending basement faults and fracture systems are present. Northeast trending features are related to the major fracture systems of the stable continental interior. They were initiated by shearing during Pre-Cambrian time and have subsequently acted as crustal zones of weakness along which mostly vertical movement has occurred. East trending basement faults may have originally developed as a result of tension between the stable Ozark uplift and the subsiding Arkoma basin during late Atokan time. Northeast and east trending faults join to form a mosaic of polygonal basement blocks. During post-Atoka uplift(s) of the Ozark region, each block behaved more or less independently. Normal faults and (more commonly) monoclinal draping occurred in the sedimentary rocks which overlie the marginal basement fault zones. Slight tilting and warping of the blocks created local homoclinal dips whose magnitude and direction may change abruptly at block margins. Structural highs occur at the most elevated margin or corner of each block. Horizontal compression during the Ouachita orogeny possibly accounts for several gentle east trending folds in the Pettigrew area. An anomalous dome structure near Witter may be related to a local high on the Pre-Cambrian basement surface

Land use change detection with LANDSAT-2 data for monitoring and predicting regional water quality degradation

The author has identified the following significant results. Comparison between LANDSAT 1 and 2 imagery of Arkansas provided evidence of significant land use changes during the 1972-75 time period. Analysis of Arkansas historical water quality information has shown conclusively that whereas point source pollution generally can be detected by use of water quality data collected by state and federal agencies, sampling methodologies for nonpoint source contamination attributable to surface runoff are totally inadequate. The expensive undertaking of monitoring all nonpoint sources for numerous watersheds can be lessened by implementing LANDSAT change detection analyses

Family Homelessness: Background Research Findings and Policy Options

Convergent sources suggest that as many as 600,000 families are homeless annually in the United States. This includes approximately 1.26 million children, representing 10% of the nation’s poor children each year. The National Survey of Homeless Assistance Providers and Clients (NSHAPC),1 conducted with homeless people using 16 types of homeless assistance programs in 76 geographical areas, is the only nationally representative data source available to estimate the number of families who are homeless in the United States. The NSHAPC estimated that family members made up 34% of the homeless population. Of this estimate, 23% were children and 11% were adults. These estimates, reflecting two different sampling points during 1996, suggest that 420,000 and 725,000 households respectively (1.3% - 2.2% percent of all families) were homeless at least one time during that year. The midpoint of the estimates would yield an estimate of 1.8% of all families (572,000 households) being homeless for at least one day during 1996. When just the poverty population is considered, the midpoint estimate indicates that 8% of poor families were homeless for at least one day during 1996