Ground-water resources of the Oakland Park area of eastern Broward County, Florida

The Oakland Park area obtains its water from the Biscayne aquifer, S composed of very permeable and porous, sandy limestones. The per- 3 meability of the aquifer increases with depth, and wells in the area <\ generally obtain water at depths ranging from 60 to 80 feet, or between S 100 and 200 feet, depending on the quantity of water desired. The data presented in this paper can be used for further development of water and wise management of resources in the area. Large quantities S of ground water are still available at Oakland Park, if salt-water encroachment can be controlled. The data in this study provide the necessary information to begin an effective water management program. (PDF has 49 pages

A constitutive model with damage for high temperature superalloys

A unified constitutive model is searched for that is applicable for high temperature superalloys used in modern gas turbines. Two unified inelastic state variable constitutive models were evaluated for use with the damage parameter proposed by Kachanov. The first is a model (Bodner, Partom) in which hardening is modeled through the use of a single state variable that is similar to drag stress. The other (Ramaswamy) employs both a drag stress and back stress. The extension was successful for predicting the tensile, creep, fatigue, torsional and nonproportional response of Rene' 80 at several temperatures. In both formulations, a cumulative damage parameter is introduced to model the changes in material properties due to the formation of microcracks and microvoids that ultimately produce a macroscopic crack. A back stress/drag stress/damage model was evaluated for Rene' 95 at 1200 F and is shown to predict the tensile, creep, and cyclic loading responses reasonably well

Achieving accurate FTIR measurements on high performance bandpass filters

The sources of ordinate error in FTIR spectrometers are reviewed with reference to measuring small out-of-band features in the spectra of bandpass filters. Procedures for identifying instrumental artefacts are described. It is shown that features well below 0.01%T can be measured reliably

That Christmas Poinsettia

Here are some tips on caring for poinsettias during and after the holdiay season. It takes some doing, but you may want to try to grow the plants on through the year and have your own poinsettia plants for next Christmas

The geoarchaeology of Dust Cave: a Late Paleoindian through Middle Archaic site in the western Middle Tennessee River Valley

This dissertation uses a geoarchaeological perspective in order to reconstruct the depositional history of Dust Cave. Dust Cave, located in the western Middle Tennessee River Valley, is a complex Late Paleoindian through Middle Archaic site. The cave contains uniquely well-preserved artifacts, and one of the earliest well-dated archaeological sequences in the southeastern US. The depositional history addresses the relationship of Dust Cave to the regional geomorphology and builds a contextual framework based on the cave\u27s microenvironment. Microenvironmental conditions directly affected both the organization of human activity and its preservation. The methodology employed consists of detailed macrostratigraphic field observations and micromorphological analyses of more than 130 sediment thin sections. Micromorphology is the most appropriate technique for the cave environment where fine-scale variation among the deposits is preserved and data from the anthropogenic sediments have the potential to inform about human activity. The zones are organized chronologically based on 46 radiocarbon ages and diagnostic artifacts. When Late Paleoindian peoples began to occupy Dust Cave ca. 10,500 B.P. it had recently been flushed of sediment from a phreatic aquifer at the rear of the cave. The entrance chamber contained only a thin veneer of reworked alluvium overlying the bedrock floor in a ~10 m wide and nearly 8 m deep room with a 5 m high ceiling. Intermittent overbank deposition with limited reworked aeolian sediments and autochthonous sediments accumulated in the cave for the next ca. 2,000 years. During this time Late Paleoindian and Early Archaic peoples seasonally inhabited the cave. Microtopographic surface variation and the periodic resurgence of phreatic drainages controlled the organization and preservation of anthropogenic sediments. After ca. 8,500 B.P., when the floodplain began to stabilize, alluvial sediments were no longer actively contributing to the cave. Sedimentation over the next 3,000 years was primarily the result of human activity, which continues until ca. 5,200 B.P. when the cave is no longer habitable. Several interesting aspects of the depositional history are revealed including relic cold features deep in the sequence and the identification and distribution of prepared surfaces. These discrete anthropogenic structures have significant implications for technology and site formation

Understanding the Role of Relationship Maintenance in Enduring Couple Partnerships in Later Adulthood

Intimate relationships in later adulthood are understudied despite their positive association with health and well-being. This cross-sectional mixed methods study sought to redress this gap by investigating relationship maintenance in later adulthood. Our international sub-sample comprised 1,565 participants aged 55 + and in an ongoing relationship. Results from hierarchical multiple regression indicated that overall happiness with the relationship had the largest effect size on relationship maintenance, with 53% of the variance explained. Content analyses of open-ended questions identified companionship and laughter as some of the “best liked” aspects of the relationship. Housework/cooking and saying “I love you” were among the behaviors that made participants feel appreciated. Results illustrated the types of maintenance behaviors adults in later adulthood who are in enduring partnerships employ

Climate Change in the High Andes:implications and adaptation strategies for small-scale farmers

Abstract: Global climate change represents a major threat to sustainable farming in the Andes. Farmers have used local ecological knowledge and intricate production systems to cope, adapt and reorganize to meet climate uncertainty and risk, which have always been a fact of life. Those traditional systems are generally highly resilient, but the predicted effects, rates and variability of climate change may push them beyond their range of adaptability. This article examines the extent of actual and potential impacts of climate variability and change on small-scale farmers in the highland Andes of Bolivia, Ecuador and Peru. It describes how climate change impacts agriculture through deglaciation, changes in hydrology, soil and pest and disease populations. The article highlights some promising adaptive strategies currently in use by or possible for producers, rural communities and local institutions to mitigate climate change effects while preserving the livelihoods and environmental and social sustainability of the regio