Path-programmable logic

Journal ArticlePath-Programmable Logic (PPL) is a structured IC design methodology under development at the University of Utah. PPL employs a sea-of-wires approach to design. In PPL, design is done entirely using cells for both functionality and interconnect. PPL cells may have modifiers that change either their connections or functionality. Wires in the PPL design plane are segmentable at any cell boundary. PPL is implemented as a set of cell libraries (NMOS, CMOS, and GaAs) and a suite of tools that permit the designer to create, modify, simulate and check PPL circuit designs and to generate mask data for them. PPL exhibits little or no area penalty with respect to full custom densities while permitting system design to be done more rapidly than with gate arrays or standard cells. PPL may be implemented as a sea-of-gates gate array to provide fast turnaround

The path programmable logic (PPL) user's manual

Journal ArticleThis manual describes the primitive NMOS path programmable logic cells currently in use at the University of Utah. It contains detailed descriptions, schematics and composite layout of all cells. Also included are PPL programming rules as well as layout design rules for each cell set

Chronicles of Oklahoma

Article describes the Fort Worth Branch of the National Archives and explains how to navigate the collection, which contains many materials related to Oklahoma history despite being in Texas. Branch Director Kent Carter urges Oklahoma historians and researchers not to overlook this plethora of information despite the institution being out of state

Differential Effects of a Direct Behavior Rating Intervention Based on Function of Problem Behavior

The purpose of this study was to investigate the effectiveness of a teacher-implemented tier two behavior intervention and differential effects based on function of student problem behavior. The participants were 36 public elementary school students who were nominated for additional behavior support beyond universal School-wide Positive Behavior Support. The intervention provided was Check-In/Check-Out, a tier two intervention using direct behavior ratings to increase structure and feedback to the student’s environment. Before and after implementation of the intervention, the authors assessed the students’ function of behavior, levels of problem behavior, prosocial behavior, and rate of behavioral incidents. A multivariate analysis of variance indicated significant effects for all students in prosocial behavior and behavioral incidents, but not problem behavior. An analysis of interaction effects indicated statistically significant differences in response to intervention based on function of problem behavior. Results are discussed in terms of considering function of problem behavior in selecting tier two interventions and implementing a three tier response to intervention model

Variability of the winter wind waves and swell in the North Atlantic and North Pacific as revealed by the Voluntary Observing Ship data

This paper analyses secular changes and interannual variability in the wind wave, swell, and significant wave height (SWH) characteristics over the North Atlantic and North Pacific on the basis of wind wave climatology derived from the visual wave observations of voluntary observing ship (VOS) officers. These data are available from the International Comprehensive Ocean–Atmosphere Data Set (ICOADS) collection of surface meteorological observations for 1958–2002, but require much more complicated preprocessing than standard meteorological variables such as sea level pressure, temperature, and wind. Visual VOS data allow for separate analysis of changes in wind sea and swell, as well as in significant wave height, which has been derived from wind sea and swell estimates. In both North Atlantic and North Pacific midlatitudes winter significant wave height shows a secular increase from 10 to 40 cm decade−1 during the last 45 yr. However, in the North Atlantic the patterns of trend changes for wind sea and swell are quite different from each other, showing opposite signs of changes in the northeast Atlantic. Trend patterns of wind sea, swell, and SWH in the North Pacific are more consistent with each other. Qualitatively the same conclusions hold for the analysis of interannual variability whose leading modes demonstrate noticeable differences for wind sea and swell. Statistical analysis shows that variability in wind sea is closely associated with the local wind speed, while swell changes can be driven by the variations in the cyclone counts, implying the importance of forcing frequency for the resulting changes in significant wave height. This mechanism of differences in variability patterns of wind sea and swell is likely more realistic than the northeastward propagation of swells from the regions from which the wind sea signal originates

Applying Ecosystem Services Approaches for Biodiversity Conservation: Benefits and Challenges

Ecosystem services as a concept and framework for understanding the way in which nature benefits people has led to a suite of approaches that are increasingly being used to support sustainable management of biodiversity and ecosystems. However, the utility of the ecosystem services framework and associated tools for supporting biodiversity conservation are the subject of ongoing debates among conservationists. In this paper, we discuss several general ways in which ecosystem services approaches are supporting biodiversity conservation, which may not have been possible otherwise. The new opportunities that ecosystem services approaches provide for biodiversity conservation include: the development of broader constituencies for conservation and expanded possibilities to influence decision-making; opportunities to add or create new value to protected areas; and the opportunities to manage ecosystems sustainably outside of protected areas. We also review areas in which ecosystem services approaches may not effectively conserve certain aspects of biodiversity. Areas of particular concern in this regard include: species without utilitarian or economic value; ecological processes that do not directly benefit people; and critical ecological functions that may be undermined in attempts to optimize a target service. Understanding the benefits and limitations of using ecosystem services approaches for achieving biodiversity conservation will help ensure that the finite resources available for biodiversity conservation and sustainable development are used as strategically and effectively as possible to maintain the multiple components of biodiversity and to support human well-being

Applying Ecosystem Services Approaches for Biodiversity Conservation: Benefits and Challenges

Ecosystem services as a concept and framework for understanding the way in which nature benefits people has led to a suite of approaches that are increasingly being used to support sustainable management of biodiversity and ecosystems. However, the utility of the ecosystem services framework and associated tools for supporting biodiversity conservation are the subject of ongoing debates among conservationists. In this paper, we discuss several general ways in which ecosystem services approaches are supporting biodiversity conservation, which may not have been possible otherwise. The new opportunities that ecosystem services approaches provide for biodiversity conservation include: the development of broader constituencies for conservation and expanded possibilities to influence decision-making; opportunities to add or create new value to protected areas; and the opportunities to manage ecosystems sustainably outside of protected areas. We also review areas in which ecosystem services approaches may not effectively conserve certain aspects of biodiversity. Areas of particular concern in this regard include: species without utilitarian or economic value; ecological processes that do not directly benefit people; and critical ecological functions that may be undermined in attempts to optimize a target service. Understanding the benefits and limitations of using ecosystem services approaches for achieving biodiversity conservation will help ensure that the finite resources available for biodiversity conservation and sustainable development are used as strategically and effectively as possible to maintain the multiple components of biodiversity and to support human well-being

Visual Elements and Cognitive Biases Influence Interpretations of Trends in Scatter Plots

Visualizations are common methods to convey information but also increasingly used to spread misinformation. It is therefore important to understand the factors people use to interpret visualizations. In this paper, we focus on factors that influence interpretations of scatter plots, investigating the extent to which common visual aspects of scatter plots (outliers and trend lines) and cognitive biases (people's beliefs) influence perception of correlation trends. We highlight three main findings: outliers skew trend perception but exert less influence than other points; trend lines make trends seem stronger but also mitigate the influence of some outliers; and people's beliefs have a small influence on perceptions of weak, but not strong correlations. From these results we derive guidelines for adjusting visual elements to mitigate the influence of factors that distort interpretations of scatter plots. We explore how these guidelines may generalize to other visualization types and make recommendations for future studies.Comment: 18 pages, 6 figure, 2 table

New solutions for the color-flavor locked strangelets

Recent publications rule out the negatively charged beta equilibrium strangelets in ordinary phase, and the color-flavor locked (CFL) strangelets are reported to be also positively charged. This letter presents new solutions to the system equations where CFL strangelets are slightly negatively charged. If the ratio of the square-root bag constant to the gap parameter is smaller than 170 MeV, the CFL strangelets are more stable than iron and the normal unpaired strangelets. For the same parameters, however, the positively charged CFL strangelets are more stable.Comment: 5 pages, 4 figures, Revtex4 styl