654 research outputs found
On the Record: Brian Corcoran
No full textAn interview with Brian Corcoran, CEO and founder of Portland-based Shamrock Sports & Entertainment, a sports marketing company. Corcoran talks about the company\u27s recent move into live events, including Carnaval Maine in Portland. He also talks about what is next for the company
NEXT: Events Help Drive the Economy, Brian Corcoran is Filling Hotel Rooms, Restaurants and Event Spaces
No full textMainebiz NEXT honoree Brian Corcoran, is CEO and founder of Shamrock Sports & Entertainment in Portland. His business has helped bring revenue-generating sports events to Maine. Corcoran also mentors Maine\u27s next generation of business leaders, and has created Portland Media Group LLC, a film, television and internet production company. His background and philosophy towards his endeavors is featured. [image
Senator Henry M. Jackson sitting with press secretary of 16 years, Brian Corcoran, in his office, Washington, D.C., January 26, 1978
No full textNote filed with photograph: Senator Jackson with Brian Corcoran, press secretary, 16 years. January 26, 1978
Corcoran Reviews the 4 Volumes of Tarski’s Collected Papers
No full textCORCORAN REVIEWS THE 4 VOLUMES OF TARSKI’S COLLECTED PAPERS Alfred Tarski (1901--1983) is widely regarded as one of the two giants of twentieth-century logic and also as one of the four greatest logicians of all time (Aristotle, Frege and Gödel being the other three). Of the four, Tarski was the most prolific as a logician. The four volumes of his collected papers, which exclude most of his 19 monographs, span over 2500 pages. Aristotle's writings are comparable in volume, but most of the Aristotelian corpus is not about logic, whereas virtually everything written by Tarski concerns logic more or less directly. There is no doubt that Tarski wrote more on logic than any other author; he started publishing on logic in 1921 at the age of 20 and continued until his death at the age of 82
CFD analysis of pharmaceutical water distribution systems: T-junctions
No full textHigh pure water systems are used in pharmaceutical and chemical industries. Deadlegs are generally found at points of use in distribution systems. The FDA suggests that the 6D rule is sufficient to help prevent microbial contamination, due to stagnant water within the dead leg. However, more recently, industrial experts are designing systems with dead legs limited to 3D or less.
The aim of this study is to examine the effects of entry length, drop loop bends, dead-leg length and mainflow velocity on flow patterns within a branch of a 50:50 mm equal tee. A 2D CFD analysis was carried out on a range of dead-leg configurations and the resulting data presented highlight the overall flow patterns with each branch. A rig was modified to carry out the dye injection tests, to verify CFD results.
It was found that the entry length had a little effect on the flow velocity of the deadleg branch. However, when a bend was incorporated in the system, the entry length increase improved the flow patterns of all dead-leg branches. Different combinations of mainflow velocities, dead-leg lengths and length extensions were evaluated to investigate their effect on the flow pattern. It was observed that high mainflow velocities yielded better flow patterns in 2DL and 4DL when compared with 6DL. High mainflow velocities resulted in good flow patterns at only 2DL. At low mainflow velocities, 4DL and 6DL had better flow patterns compared with 2DL. Increasing the length of the extension resulted in better flow patterns in 6DL. At both, high and low mainflow velocities, 4DL sowed a reasonable flow pattern in the branch. Flow visualization studies were performed as well as a CFD simulation. The results of both studies were in good agreement in the case of 4DL branch length. However, for 2DL, an accelerated dye dispersion was observed, suggesting a higher fluid exchange between the mainstream flow and the branch
Pharmaceutical water systems: a thermal-fluid analysis of pipe dead-legs
No full textThe most commonly used technique for flow exchange, fluid isolation and removal in pharmaceutical water systems, is the installation of a branch tee with a conventional two-way outlet port valve. This however can create a stagnant or “dead-leg” zone, which is particularly hazardous as bacteria can accumulate and contaminate the entire water system. This project has involved the study of the thermal and fluid dynamics considerations within pipe dead-legs and their impact on high purity water systems. A detailed literature review of the technology surrounding pharmaceutical water systems was carried out to set the background for the analysis of pipe dead-legs.
An experimental test rig was designed and constructed to represent a typical single loop water system incorporating a dead-leg test section. Results were obtained for a 6d, 4d and 2d branch tee configuration under dead-leg flow conditions. The effect of the main pipe loop velocity and temperature on the dead-leg end temperature was investigated. Determination of the temperature distribution along the axis of the dead-leg branch under steady state conditions was also investigated.
It was shown that the maximum dead-leg end temperature increased for an increase in loop velocity for each configuration. Reducing the dead-leg length from a 6d to a 4d and 2d configuration respectively was shown to significantly increase the dead-leg end temperature. It was found that a zone of uniform temperature and a temperature decay region were present in each branch configuration respectively. It was shown that stagnant fluid was present at the end o f the dead-leg for the 6d and 4d configurations. The 2d dead-leg was found to be the most effective configuration to achieve full loop temperature penetration and mixing of the dead-leg fluid. The 6d rule was shown to be inadequate for both fluid mixing and loop temperature penetration
A thermal-fluid analysis of piping dead-legs in high purity water systems
No full textPurified water forms an integral part of pharmaceutical production. The consistency of water quality produced by purrficatron processes and distributed to points-of-use is of utmost importance Tee-sectlons Installed in distribution loops are commonly used to divert fluid flow at take-off points. However fluid flow restriction at teesection branches can cause piping dead-legs.
Dead-legs consist of reglons of stagnant fluid where harmful organisms can proliferate unaffected by the scounng effects of distribution loop flow. This thesis presents a thermo-fluld analysis focusmg upon the fluid dynamics and heat transfer mechanisms occurrmg wthin dead-leg branches A literature review of high purity water system designed etails sanitization methods currently employed in industry with reference to the detrimental effects of dead-legs.
Experimentation was performed using a single-loop fluid rig complete with capped 90' tee-section representmg a piplng dead-leg. Analysis of the thermal conditions for various dead-leg configurations was performed mcludmg variations of branch length and diameter. The effect of varying loop velocity was also investigated. The application of non-intrusive analysis techniques was considered. Infrared thermography and surface-mounted thermocouples were used to map surface temperature distribution across a dead-leg branch.
Increased temperatures were noted at the base of the dead-leg branch for increasing loop velocities. Comparison of reduced and equal diameter dead-legs for varying branch lengths suggested dead-leg temperature is strongly related to mlet loop velocity. Acceptable thermal responses were noted m 4d dead-legs for loop velocity > 0.94m/s, 2d reduced diameter dead-legs at 1 50m/s and in 2d equal diameter deadlegs throughout the examined velocity range.
Although all dead-leg configurations used in analysis adhered to industry recommendations; unsatisfactory thermo-fluid conditions recorded for remalnlng dead-legs suggests revision of accepted regulations. Non-intrusive analyses illustrated greater temperatures at branch md-pomnt compared with base measurements. However the application of techniques was deemed limited due to pipe wall conduction effects
Setting the agenda for parking research in other cities
No full textThe chapter reflects on the 12 case studies discussed in the book and considers their implications for future research. At the end of the chapter, a new agenda for parking research in large cities is set out.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Spatial Planning and Strateg
Corcoran recommends Hambourger on the Frege-Russell number definition
No full textIt is widely agreed by philosophers that the so-called “Frege-Russell definition of natural number” is actually an assertion concerning the nature of the numbers and that it cannot be regarded as a definition in the ordinary mathematical sense. On the basis of the reasoning in this paper it is clear that the Frege-Russell definition contradicts the following three principles (taken together): (1) each number is the same entity in each possible world, (2) each number exists in each possible world, (3) some entities existing in the actual world do not exist in every possible world. Since these principles seem to be true, the paper is a refutation of the Frege-Russell definition. The paper does more. It shows that the contradictory of the Frege-Russell definition follows even when principles 2 and 3 are replaced by one considerably weaker principle. The ideas contained in the paper are related to two earlier objections to the definition. The first, sometimes attributed to the mathematician, C. S. Keyser, is that existence of the numbers as defined implies the existence of infinitely many particulars in each possible world. The second is, in effect, an idea which is said to have led Whitehead to reject the definition of number to which he had subscribed in Principia Mathematica. Whitehead is supposed to have said that he could not believe that the number two changes every “time twins are born”. The mathematician H. Jeffreys expressed similar ideas [Philos. of Sci. 5 (1938), 434–451]. One of the merits of the author’s work is that it refutes the Frege-Russell definition without the need to take sides on controversial points presupposed by the Keyser and Whitehead objections. The objections made by the author are therefore not to be identified with the Keyser and Whitehead objections. Even if the author’s work is to be regarded as a refinement and integration of previous ideas, it is nevertheless a contribution—not only because the basic points are well worth repeating but also because the refinements are logically significant improvements and because the author has stated them clearly and concisely in the idiom of contemporary philosophy
Disbelief Logic Complements Belief Logic
No full textJOHN CORCORAN AND WAGNER SANZ, Disbelief Logic Complements Belief Logic. Philosophy, University at Buffalo, Buffalo, NY 14260-4150 USA E-mail: [email protected] Filosofia, Universidade Federal de Goiás, Goiás, GO 74001-970 Brazil E-mail: [email protected] Consider two doxastic states belief and disbelief. Belief is taking a proposition to be true and disbelief taking it to be false. Judging also dichotomizes: accepting a proposition results in belief and rejecting in disbelief. Stating follows suit: asserting a proposition conveys belief and denying conveys disbelief. Traditional logic implicitly focused on logical relations and processes needed in expanding and organizing systems of beliefs. Deducing a conclusion from beliefs results in belief of the conclusion. Deduction presupposes consequence: one proposition is a consequence of a set of a propositions if the latter logically implies the former. The role of consequence depends on its being truth-preserving: every consequence of a set of truths is true. This paper, which builds on previous work by the second author, explores roles of logic in expanding and organizing systems of disbeliefs. Aducing a conclusion from disbeliefs results in disbelief of the conclusion. Aduction presupposes contrequence: one proposition is a contrequence of a set of propositions if the set of negations or contradictory opposites of the latter logically implies that of the former. The role of contrequence depends on its being falsity-preserving: every contrequence of a set of falsehoods is false. A system of aductions that includes, for every contrequence of a given set, an aduction of the contrequence from the set is said to be complete. Historical and philosophical discussion is illustrated and enriched by presenting complete systems of aductions constructed by the second author. One such, a natural aduction system for Aristotelian categorical propositions, is based on a natural deduction system attributed to Aristotle by the first author and others. ADDED NOTE: Wagner Sanz reconstructed Aristotle’s logic the way it would have been had Aristole focused on constructing “anti-sciences” instead of sciences: more generally, on systems of disbeliefs
- …
