Structural Integrity: A Paradigm of Systemic Engineering and Organization

This article addresses the nature of educational organizations for an engineering perspective. Principles of structural engineering are employed as a means of examining and addressing problems within educational organizations. Both current and future issues are addressed in relation to the redesign of educational organizations in relation to function, flexibility, and efficacy. Suggestions and recommendations are provided

Hadamard States and Adiabatic Vacua

Reversing a slight detrimental effect of the mailer related to TeXabilityComment: 10pages, LaTeX (RevTeX-preprint style

The role of a conserved membrane proximal cysteine in altering αPS2CβPS integrin diffusion

Cysteine residues (Cys) in the membrane proximal region are common post-translational modification (PTM) sites in transmembrane proteins. Herein, the effects of a highly conserved membrane proximal α-subunit Cys1368 on the diffusion properties of αPS2CβPS integrins are reported. Sequence alignment shows that this cysteine is palmitoylated in human α3 and α6 integrin subunits. Replacing Cys1368 in wild-type integrins with valine (Val1368) putatively blocks a PTM site and alters integrins\u27 ligand binding and diffusion characteristics. Both fluorescence recovery after photobleaching (FRAP) and single particle tracking (SPT) diffusion measurements show Val1368 integrins are more mobile compared to wild-type integrins. Approximately 33% and 8% more Val1368 integrins are mobile as measured by FRAP and SPT, respectively. The mobile Val1368 integrins also exhibit less time-dependent diffusion, as measured by FRAP. Tandem mass spectrometry data suggest that Cys1368 contains a redox or palmitoylation PTM in αPS2CβPS integrins. This membrane proximal Cys may play an important role in the diffusion of other alpha subunits that contain this conserved residue

Forage production on range sites in east central Malheur County, Oregon

Objectives of this investigation were two-fold: (l) to determine crested wheatgrass production on selected range sites and (2) to evaluate present and potential production on public and private lands in the study area. Field studies were carried out in 1953 and 1964 near Jordan Valley, Malheur County, Oregon, on the East Cow Creek and Soldier Creek Allotments of the Bureau of Land Management, Vale Grazing District. Sixteen paired exclosures with nine, 9.6-square-foot circular plots within each exclosure were used to determine production on range sites in improved and unimproved condition. The improved areas had been seeded to crested wheatgrass. Three different range sites were differentiated on the basis of dominant shrub, dominant grass, soils, landforms, and aspect. Crested wheatgrass two-year average production varied from 250 to 1,350; 250 to 1,850; and 150 to 1,500 pounds per acre on Sites I, II, and III, respectively. A range inventory method was developed and the entire East Cow Creek Allotrnent (50, 175 acres) and permittee properties (14,010 acres) were inventoried. Present production, potential production, and information for determining acreages in need of and suitable for various range improvement and management practices were obtained

Findings and Recommendations of the Metropolitan Planning and Zoning Committee of the Jacksonville Chapter of the American Institute of Architects

Contained is a proposed bill that was introduced to the 1957 Florida Legislature concerning city development and zoning law

Numeric and symbolic evaluation of the pfaffian of general skew-symmetric matrices

Evaluation of pfaffians arises in a number of physics applications, and for some of them a direct method is preferable to using the determinantal formula. We discuss two methods for the numerical evaluation of pfaffians. The first is tridiagonalization based on Householder transformations. The main advantage of this method is its numerical stability that makes unnecessary the implementation of a pivoting strategy. The second method considered is based on Aitken's block diagonalization formula. It yields to a kind of LU (similar to Cholesky's factorization) decomposition (under congruence) of arbitrary skew-symmetric matrices that is well suited both for the numeric and symbolic evaluations of the pfaffian. Fortran subroutines (FORTRAN 77 and 90) implementing both methods are given. We also provide simple implementations in Python and Mathematica for purpose of testing, or for exploratory studies of methods that make use of pfaffians.Comment: 13 pages, Download links: http://gamma.ft.uam.es/robledo/Downloads.html and http://www.phys.washington.edu/users/bertsch/computer.htm