Multiprocessor graphics computation and display using transputers

A package of two-dimensional graphics routines was developed to run on a transputer-based parallel processing system. These routines were designed to enable applications programmers to easily generate and display results from the transputer network in a graphic format. The graphics procedures were designed for the lowest possible network communication overhead for increased performance. The routines were designed for ease of use and to present an intuitive approach to generating graphics on the transputer parallel processing system

Pursuing the Principalship: Factors in Assistant Principals’ Decisions

School administrators who are hired to lead and guide schools and districts must possess a number of characteristics that allow them to become successful leaders. The presence or absence of a strong educational leader can make all the difference in school climate and student achievement (Kelley, Thornton, & Daugherty, 2005). Educational leaders need to be cognizant of what constitutes an effective leader and which characteristics have the most effective impact on student achievement. Alford et al. (2011) stated, while principals are engaged in the managerial tasks of the school, securing the building for safety, ensuring bus routes, student schedules, and the day-to-day management tasks, the instructional needs of the faculty and students compete for attention (p. 29)

Persistent homology of groups

We introduce and investigate notions of persistent homology for p-groups and for coclass trees of p-groups. Using computer techniques we show that persistent homology provides fairly strong homological invariants for p-groups of order at most 81. The strength of these invariants, and some elementary theoretical properties, suggest that persistent homology may be a useful tool in the study of prime-power groups.Comment: 12 pages, 6 figure

Two-dimensional graphics tools for a transputer based display board

A package of 2-D graphics routines has been developed in an effort to standardize and simplify the user interface for a transputer based graphics display board. The routines available take advantage of the graphic board's capabilities while also presenting an intuitive approach for generating drawings. The routines allow a user to perform graphics rendering in a 2-D real-coordinate space without regard to the actual screen coordinates. Multiple windows, which can be placed arbitrarily on the screen as well as the ability to use double-buffering techniques for smooth animations are also supported. The routines are designed to be run on a transputer other than the graphics display board. The window and screen parameters are maintained locally. The conversion to device coordinates is also performed locally. The only data sent to the display board are control and device coordinate display commands. The routines available include: rotation translation, and scaling commands; absolute and relative point and line commands; circle, rectangle and polygon commands; and window and viewpoint definition commands

Distributed computation of graphics primitives on a transputer network

A method is developed for distributing the computation of graphics primitives on a parallel processing network. Off-the-shelf transputer boards are used to perform the graphics transformations and scan-conversion tasks that would normally be assigned to a single transputer based display processor. Each node in the network performs a single graphics primitive computation. Frequently requested tasks can be duplicated on several nodes. The results indicate that the current distribution of commands on the graphics network shows a performance degradation when compared to the graphics display board alone. A change to more computation per node for every communication (perform more complex tasks on each node) may cause the desired increase in throughput

Magnesium as a factor in nitrogen fixation by soybeans

Publication authorized July 1, 1938.Includes bibliographical references (page 30)

Copper and Cobalt contents of twenty-six soil types.

"The material of this bulletin was taken from the thesis presented by F.R. Johnson for the degree of M.A., University of Missouri, February, 1950. It is a report on Department of Soils Project Number 51 entitled 'Fertility level of soils'"--P. [3].Includes bibliographical references (pages 15-16)

Soil magnesium and the growth and chemical composition of plants

A report on Department of Soils Research Project No. 207, 'Soil fertility'--P. [2].Digitized 2007 AES.Includes bibliographical references (page [20])

Casting Light on Dark Matter

The prospects for detecting a candidate supersymmetric dark matter particle at the LHC are reviewed, and compared with the prospects for direct and indirect searches for astrophysical dark matter. The discussion is based on a frequentist analysis of the preferred regions of the Minimal supersymmetric extension of the Standard Model with universal soft supersymmetry breaking (the CMSSM). LHC searches may have good chances to observe supersymmetry in the near future - and so may direct searches for astrophysical dark matter particles, whereas indirect searches may require greater sensitivity, at least within the CMSSM.Comment: 16 pages, 13 figures, contribution to the proceedings of the LEAP 2011 Conferenc