Tube-to-header joint for bimetallic construction

Design advantages of bimetallic construction enables an all-welded bimetallic joint to be made from the accessible header side of the tube-to-header joint. In the two-piece header design the weld joints completely seal the tube-header plate crevice and prevent crevice and stringer corrosion

Determination of the weldability and elevated temperature stability of refractory metal alloys quarterly report no. 6, 21 sep. - 20 dec. 1964

Determination of weldability and elevated temperature stability of refractory metal alloy

Determination of the weldability and elevated temperature stability of refractory metal alloys Ninth quarterly report, 21 Jun. - 20 Sep. 1965

Tensile strength and thermostability of welded refractory metal joint

Determination of the weldability and elevated temperature stability of refractory metal alloys seventh quarterly report, dec. 21, 1964 - mar. 20, 1965

Weldability and elevated temperature stability of refractory metal alloy

Determination of the weldability and elevated temperature stability of refractory metal alloys Tenth quarterly report, 21 Sep. - 20 Dec. 1965

Weldability and long time elevated temperature stability of refractory metal alloys for advanced alkali-metal space electric power system

Pacioli and humanism: pitching the text in Summa Arithmetica

Despite the wide cross-disciplinary influence of Fra’ Luca Pacioli’s Summa de Arithmetica, Geometria, Proportioni et Proportionalita (Summa), it has been criticized as being both difficult to read and written in a mixture of bad Italian and bad Latin; but, paradoxically, intellectuals of Pacioli’s day praised the style of writing in Summa. Can both viewpoints be correct? The answer to this question is sought by identifying what may have inspired Pacioli to write Summa in the manner he did. In doing so, the article considers the times in which he lived and, in particular, the impact that Renaissance Humanism and Humanist Education may have had upon his writing style. The article finds both views were correct in their own timeframes and contexts and that Pacioli’s writing style was both an appropriate one with which to address a contemporary merchant society and one which would impress and gain the approval of his fellow humanist educators and patrons

The market for Luca Pacioli's Summa arithmetica

This paper looks at an aspect of Luca Pacioli and his Summa Arithmetica that has not previously been explored in detail – the market for which he wrote the book. In order to do so, it follows a path identified by two clues in the bookkeeping treatise as to the nature of this market that modern eyes, unaware of how life was in late 15th century Italy, have missed. After discussing the curriculum taught in schools at that time, this paper considers a range of possible markets for which the book may have been written. The paper concludes that it was written primarily for, and sold mainly to, merchants who used the book as a reference text, as a source of pleasure from the mathematical puzzles it contained and as an aid for the education of their sons

Inhomogeneous spin diffusion in traps with cold atoms

The spin diffusion and damped oscillations are studied in the collision of two spin polarized clouds of cold atoms with resonant interactions. The strong density dependence of the diffusion coefficient leads to inhomogeneous spin diffusion that changes from central to surface spin flow as the temperature increases. The inhomogeneity and the smaller finite trap size significantly reduce the spin diffusion rate at low temperatures. The resulting spin diffusion rates, spin drag and initial damped oscillations are compatible with measurements at low to high temperatures for resonant attractive interactions but are incompatible with a metastable ferromagnetic phase.Comment: 3 pages, 1 figure; Phys. Rev. Letters, 201

Use of the Bipedicled Scalp Flap for Forehead Reconstruction

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/74824/1/j.1524-4725.1984.tb01210.x.pd