Boron/aluminum fan blades for SCAR engines

Processing procedures were developed to enhance boron/aluminum bond behavior and foreign object damage (FOD) tolerance. Design and analysis indicated that the J101 Stage 1 fan blade meets the required frequencies without a midspan shroud. The fabricability of full size J101 blades was assessed, while six blades were fabricated and finished machined

Individual Values and SME Environmental Engagement

We study the values on which managers of small and medium-sized enterprises draw when constructing their personal and organizational-level engagement with environmental issues, particularly climate change. Values play an important mediating role in business environmental engagement but relatively little research has been conducted on individual values in smaller organizations. Using the Schwartz Value System (SVS) as a framework for a qualitative analysis, we identify four ‘ideal-types’ of SME managers and provide rich descriptions of the ways in which values shape their constructions of environmental engagement. In contrast to previous research, which is framed around a binary divide between self-enhancing and self-transcending values, our typology distinguishes between individuals drawing primarily on Power or on Achievement values, and indicates how a combination of Achievement and Benevolence values is particularly significant in shaping environmental engagement. This demonstrates the theoretical usefulness of focusing on a complete range of values. Implications for policy and practice are discussed

Present and potential land use mapping in Mexico

The Mexican Water Plan (MWP) conducted studies of present and potential land use in Mexico using LANDSAT-1 satellite imagery. Present land use studies were carried out all over the country (197 million hectares); nine soil uses were mapped according to the first classification level recommended by the U.S. Geological Survey. Also 6.3 million hectares of land with advanced erosion were detected. Work was executed at a rate of 8 million hectares per month; reliability was 90% and the cost of only 0.1 cents/hectare. The potential land use study was performed in 45 million hectares at a rate of 4 million hectares per month and at a cost of 0.33 cents/hectare. Soil units according to FAO classification were delineated scale 1:1 million; interpretative maps were also prepared dealing with potential agricultural productivity carrying capacity for cattle, water, erosion risk, and slope ranges

Polarizing optics in a spider eye

Many arthropods including insects and spiders exploit skylight polarization for navigation. One of the four eye pairs of the spider Drassodes cupreus is dedicated to detect skylight polarization. These eyes are equipped with a tapetum that strongly plane-polarizes reflected light. This effectively enhances the polarization-sensitivity of the photoreceptors, improving orientation performance. With a multidisciplinary approach, we demonstrate that D. cupreus exploits reflective elements also present in non-polarizing tapetal eyes of other species such as Agelena labyrinthica. By approximately orthogonal arrangement of two multilayer reflectors consisting of reflecting guanine platelets, the tapetum uses the mechanism of polarization by reflection for polarizing reflected ligh

Unraveling Controls on Fracture Stratigraphy in Carbonates: The Influence of Regional Stress, Mechanical Properties, and Diagenesis

Fracture characteristics analyzed from outcrops provide key insights into the migration pathways of subsurface hydrocarbons, and allow for a detailed understanding of the tectonic history in an area. This study looks to assess the impacts that various controlling factors have on the development of fracture characteristics. To complete this objective, a succession of Ordovician to Mississippian rocks was examined. The logged section includes the Cotter Dolomite, Chattanooga Shale, St. Joe Formation, and the Boone Formation (subdivided into informal Upper and Lower members). Located in northwestern Arkansas and southwestern Missouri, data were collected from roadcut exposures along Highway 71. Collected fracture orientation data were used to determine the evolution of regional stress affecting the area of interest. Using hardness data measured from outcrops via a Schmidt Hammer, a generated mechanical stratigraphy was compared to lithology and diagenetic alteration. Photographs taken of fractures from the field were used to determine Fracture Intensity (FI) values, and used to ascertain the effect that bed thickness and mechanical property variation had on the development of FI. Fracture orientations indicate 4 main deformation events: 1) folding of the Ordovician strata, 2) oblique compression and indentation during the Ouachita Orogeny, 3) effect of far-field stresses from Ancestral Rocky Mountain uplifts, and 4) far-field stresses as a result of the late stage of the Alleghanian Orogeny. FI varies with mechanical contrasts, but is not constrained by bed boundaries. The mechanical stratigraphy observed in the studied succession is a direct result of lithological changes, with minor impact from diagenetic chert within some units. This work indicates that in this study area, regional stresses exert the primary control over fracture orientation, while large-scale mechanical variations control the FI. These findings contribute to the development of a suite of “best practices” for future studies by demonstrating that a thorough regional stress investigation and careful mechanical stratigraphy analysis are critical to understanding fracture development. Advisor: Caroline M. Burberr

Evaluation of the application of ERTS-1 data to the regional land use planning process

The author has identified the following significant results. Employing simple and economical extraction methods, ERTS can provide valuable data to the planners at the state or regional level with a frequency never before possible. Interactive computer methods of working directly with ERTS digital information show much promise for providing land use information at a more specific level, since the data format production rate of ERTS justifies improved methods of analysis

A Finite Domain Constraint Approach for Placement and Routing of Coarse-Grained Reconfigurable Architectures

Scheduling, placement, and routing are important steps in Very Large Scale Integration (VLSI) design. Researchers have developed numerous techniques to solve placement and routing problems. As the complexity of Application Specific Integrated Circuits (ASICs) increased over the past decades, so did the demand for improved place and route techniques. The primary objective of these place and route approaches has typically been wirelength minimization due to its impact on signal delay and design performance. With the advent of Field Programmable Gate Arrays (FPGAs), the same place and route techniques were applied to FPGA-based design. However, traditional place and route techniques may not work for Coarse-Grained Reconfigurable Architectures (CGRAs), which are reconfigurable devices offering wider path widths than FPGAs and more flexibility than ASICs, due to the differences in architecture and routing network. Further, the routing network of several types of CGRAs, including the Field Programmable Object Array (FPOA), has deterministic timing as compared to the routing fabric of most ASICs and FPGAs reported in the literature. This necessitates a fresh look at alternative approaches to place and route designs. This dissertation presents a finite domain constraint-based, delay-aware placement and routing methodology targeting an FPOA. The proposed methodology takes advantage of the deterministic routing network of CGRAs to perform a delay aware placement

There Is No Place Like Home: The Body as the Scene of the Crime in Sexual Assault Intervention

The body is the scene of the crime, is an oft-repeated phrase among nurses conducting sexual assault forensic examinations. This instruction reminds nurses that the object under scrutiny, the sexually violated body, is the location and source of establishing legal evidence. The nurses\u27 interest lies in recovering evidentiary materials towards deriving a future juridical truth and providing a means for remedy or restitution. The constitution of truth obscures how the subject comes to be at home and dwell in a world where rape occurs. This article argues that regarding the body as a crime scene is more than a rhetorical or pedagogical move made by forensic practitioners. Rather, forensic examination is constituted through rigorous and meticulous techniques that scrutinize the body of the sexually violated subject in such a way that the harming and healing capacities of the domestic are disarticulated from one another. What is at stake is the state\u27s reliance on a notion of the domestic as a sphere to which one might return and heal, even in instances where the domestic itself is the source or site of injury, such as incest and domestic violence