69,875 research outputs found
P. T. Reilly Papers,
No full textRiverman and historian. Items regarding San Juan, Green, and Colorado Rivers. Includes notes on John Wesley Powell\u27s life preserver, buildings at Lee\u27s Ferry, reminiscences of Norman Nevills, an autobiographical oral interview, flight logs over southeastern Utah and the Grand Canyon, trip logs of excursions down the Green and Colorado rivers, 1949-1984, correspondence with J. Harvey Butchart, Otis R. "Dock" Marston, Morris A. Shirts, Gary Topping, and others. Includes copies of Grand Canyon hike logs by J. Harvey Butchart.; Correspondence and miscellaneous; Oral History Interviews; Miscellaneous; Flight Records; River Logs; Otis R. "Dock" Marston; J. Harvey Butchart; Miscellaneous Correspondence and Research Notes Filed Alphabetically; Correspondence and miscellaneous; Plez Talmadge Reilly Vita; Correspondence, USHS; Correspondence, Gary Topping 1985-1986; Correspondence, Gary Topping 1987-1988; "Norman D. Nevills As I Knew Him"; Norman D. Nevills publicity material; Correspondence, Nevills 1947; Material on "Lake Nevills"; J. W. Powell Life Preserver; "The Buildings at Lee\u27s Ferry"; Lee\u27s Ferry, Tuba City and Navajo Reservation; Glen Canyon; Oral History Interviews; Reilly Oral History Interview by Gary Topping, 15 May 1986; Reilly Oral History interview by Gary Topping, 16 May 1986; Juanita Brooks Oral History Interview by Reilly; Arthur L. Chaffin Oral History Interview by Reilly; Wilford Clark Oral History Interview by Reilly; Silas S. Fish Oral History Interview by Reilly; Amarilla H. Lee Oral History Interview by Reilly; Otis R. "Dock" Marston Oral History Interview by Reilly; Helen P. Sindar Oral History Interview by Reilly and George S. Tanner; Louetta B. Tanner Oral History Interview by Reilly and George S. Tanner; Oral History Interview, W. T. Roe 1953; newspaper clipping; Miscellaneous; Correspondence, Dock Marston, 1951; Correspondence, Boyd Moore and P. P. Patraw; Newspaper clippings, 1955 Reilly Trip; Flight Records; Flight Record, San Juan, 11 October 1947; Flight Record, West End of Grant Canyon, 25 March 1956; Flight Record, Grand Canyon, 29 September 1956; Flight Record, Nevada, Arizona and Utah, 13-14 April 1957; Flight Record, Grand Canyon and Monument Valley, 4-5 May 1957; Flight Record, Utah and Arizona, 19-20 April 1958; Flight Record, Sierras, 7 March 1959; Flight Record, Green River, Utah, 3-4 September 1960; Flight Record, Page, Arizona, 3-4 November 1962; Flight Record, Grand Canyon, 4-5 April 1964; Flight Record, Cataract Canyon, 8-9 April 1966; Flight Record, Glen Canyon, 5-6 June 1965; Flight Record, Green River, Utah, 1961; Flight Record, Grand Canyon via Helicopter, 2 November 1984; River Logs; River Log, Green River, 1949; River Log, Grand Canyon, 1949; River Log, E. M. Reilly Grand Canyon, 1950; River Log, E. M. Reilly Grand Canyon, 1951; River Log, Grand Canyon, 1953; River Log, Grand Canyon, 1955; River Log, V. R. "Brick" Mortensen, 1955; River Log, Grand Canyon, 1956; River Log, V. R. "Brick" Mortensen, 1957; River Log, Grand Canyon, 1957; River Log, Grand Canyon, 1958; River Log, Grand Canyon, 1959; River Log, Grand Canyon, 1962; River Log, Glen Canyon, 1964; River Log, Grand Canyon, 1964; James W. Packard Letter; River Log, Joe Hall and William C. Jones, 1964; Jones, "Backpacking in the Sierra Nevada"; Trip to Turquoise Bay, 1967; River Log, Hall\u27s Crossing to Cove Canyon, 24 April 1968; Grand Canyon National Park River Instructions and Information, 1982; River Log, Grand Canyon, 1982; River Log, Grand Canyon, 1984; Otis R. "Dock" Marston; Thorn Mayes Maps of Monument Valley; Biographical File; Marston River Log, Grand Canyon, 1942; Marston River Log, Grand Canyon, 1947; Marston River Log, Dolores River, 1948; Marston River Log, Grand Canyon, 1948; Marston River Log, Ouray to Green River, Utah, 1951; Marston River Log, Grand Canyon, 1951; Marston River Log, Grand Canyon, 1954; Marston River Log, Grand Canyon, 1957; Marston River Log, Grand Canyon, 1958; Marston River Log, Grand Canyon, 1959; Marston Trip Diary, Lee\u27s Ferry to Lake Mead to Lee\u27s Ferry, 1960; Marston Sportyaks, Grand Canyon, 1963 (Sportyaks through Grand Canyon); Marston Sportyaks, Cataract Canyon, 1964; Marston River Log, Grand Canyon, 1965; Dock Marston Publicity; Correspondence, Marston, 1949-1954; Correspondence, Marston, 1955-1961; Correspondence, Marston, 1962-1975; J. Harvey Butchart; Biographical Notes; Correspondence, Butchart, 1949-1971; Correspondence, Butchart, 1972-1989; Butchart Hiking Log, #1-17 1954-1957; Butchart Hiking Log, #18-41 1958-1959; Butchart Hiking Log, #42-73 1960-1961; Butchart Hiking Log, #74-116 1962-1963; Butchart Hiking Log, #117-160 1964-1965; Butchart Hiking Log, #161-207 1966-1967; Butchart Hiking Log, #208-256 1968-1969; Butchart Hiking Log, #257-303 1970-1971; Butchart Hiking Log, #304-343 1972-1973; Butchart Hiking Log, #344-381 1974-1975; Butchart Hiking Log, #382-418 1976-1979; Jorgen Visback River Log, 1966; Miscellaneous Correspondence and Research Notes [Filed Alphabetically]; Beck, George L.; Brimhall, Edna Lee; Brooks, Juanita; Cheel, Chester W. "Clark County and Southern Nevada"; Casebier, Dennis G.; Davis, Donald; River Log, Fulmer, S. M. B. Grand Canyon 1955; Fulmer Boat Design and Biography; Green River, Wyoming [Reynolds- Hallacy]; Harrison, Michael; Larson, A. Karl, 1968-1975; Larson, A. Karl, 1976-1983; McKee, Eddie; Masland, F. E.; Mexican Hat Expeditions; Nevills Articles; Pratt, Lavar; Richardson, Gladwell "Toney"; Riffey, John; Rusho, W. L.; Crampton, C. G.; Burchard, A. S.; Smith, D. L.; Schwartz, Douglas W.; Shirts, Morris A. 1978-1979; Shirts, Morris A. 1980-1981; Shirts, Morris A. 1982-1983; Shirts, Morris A. 1984-1985; Shirts, Morris A. 1986-1987; Staveley, Gaylord and Joan Nevills Staveley; Southwest Museum; Tanner, George S. 1968-1974; Tanner, George S. 1975-1984; Taylor, Raymond W.; Wright, J. Fran
P. T. Reilly correspondence with George S. Tanner, 1981
No full textCopies of typed letters from P. T. Reilly of Sun City Arizona, to George S. Tanner in Salt Lake City during 1981. Topics include discussion of Tanner\u27s recent book on Mary Jane Mount Tanner; Lewis M. Tenney (descendant of an Arizona settler), the first sawmill at Mogollon Rim, Arizona; the James P. Andrus diary and Karl Larson, as well as comments on current events and politics. Includes a map of the trail of emigrants in the vicinity of Lee\u27s Ferry
Name Inscriptions--P.M.H. P.1
No full textOn January 15, 1890 the Stanton crew found the body of Peter M. Hansbrough on the beach at Harding Rapid, mile 43.7. The next day he was buried at the base of a limestone cliff which Stanton called a shaft of pure marble, 70 ft. high. The men knew that Hansbrough had cut the Brown inscription the previous July and had been the next to die. They held back but finally Langdon Gibson chiseled "PMH 1889." Photo by: P.T. Reilly
Generation and presentations of semigroup constructions : Bruck-Reilly extensions and P-semigroups
No full textIn this thesis we study problems regarding finite presentability of Bruck-Reilly extensions, finite generation of the underlying monoids, and finite generation of P-unitary inverse semigroups.
The first main question we consider is: Let M be a monoid and θ and endomorphism of M. If the Bruck-Reilly extension BR(M, θ) is finitely presented is the monoid M necessarily finitely generated? We answer this question for the following classes of monoids: semilattices; Clifford monoids; zero monoids; free monoids; completely (0-)simple semigroups; and semidirect products of semilattices by groups. This allows us to obtain necessary and sufficient conditions for the Bruck-Reilly extensions of these classes of monoids to be finitely presented.
We also show that, like the free inverse monoid, a Bruck-Reilly extension (of an inverse monoid) is not necessarily finitely presented as a monoid when it happens to be finitely presented as an inverse monoid.
We then consider the question: When are P-semigroups, or P-unitary inverse semigroups, finitely generated? We give necessary and sufficient conditions for a P-semigroup P(G, X, Y) to be finitely generated in the case when X\Y is finite, and consider several particular cases when X\Y is infinite
Timing of Familial Breast Cancer in Sisters
No full textBackground: Women who have had a first-degree relative diagnosed with breast cancer (ie, a positive family history) have a rate of breast cancer that is approximately twice that of all women their age, but it is unclear how they should perceive this risk at different ages or if they should be considered at higher risk for the remainder of their lifetime.
Methods: We used Swedish population–based data to assess the risk of breast cancer in 23654 sisters of women diagnosed with breast cancer and in 1 732 775 sisters of unaffected women from 1958 through 2001. Poisson models were used to express the rate of breast cancer as a function of current age, whether a woman had an affected sister, time since the first diagnosis in the family, and family size (number of sisters). The effect of the age of the index case (the first sister diagnosed in the family) at diagnosis and whether her "at-risk" sisters had achieved this age were examined in stratified analyses. Incidence rate ratios of breast cancer in exposed compared with unexposed sisters were calculated with 95% confidence intervals. All estimates were adjusted for calendar time.
Results: Sisters of breast cancer patients had higher breast cancer incidence than unexposed sisters at all ages. The association of exposure (ie, a diagnosis of breast cancer in a sister) with the risk of breast cancer was most pronounced in young women (age 20–39; incidence rate ratio = 6.64, 95% confidence interval = 4.66 to 9.48), and the relative risk decreased to approximately 2 in women older than 50 years. The risk associated with having a sister diagnosed with breast cancer was not modified substantially by the age of the index case at diagnosis (≤45 years vs >45 years). The risk was similar for women who were approaching the age at which the first sister was diagnosed in their family and those who had already attained it. The incidence rate ratio of breast cancer in exposed sisters compared with unexposed sisters was constant over time for all age categories of at-risk women.
Conclusions: Women who have a sister diagnosed with breast cancer have an increased risk of breast cancer throughout much of their lifetimes
Finite presentability of Bruck-Reilly extensions of Clifford monoids
No full textLet M be a Clifford monoid and let theta be an endomorphism of M. We prove that if the Bruck-Reilly extension BR(M,theta) is finitely presented then M is finitely generated. This allows us to derive necessary and sufficient conditions for Bruck-Reilly extensions of Clifford monoids to be finitely presented.</p
On the second ıntegral homology of Bruck-Reilly extensions of monoids
No full textM bir monoid ve θ, M üzerinde bir endomorfizm olsun. N^0 negatif olmayan tamsayıların kümesi, r=max{n,p} ve θ^0, M üzerinde birim dönüşüm olmak üzere N^0×M×N^0 kümesi
(m,a,n)(p,b,q)=(m-n+r,(aθ^(r-n) ) (bθ^(r-p) ),q-p+r)
ikili işlemi ile birlikte bir monoid tanımlar. Bu monoide θ nin belirlediği M nin Bruck-Reilly genişlemesi denir ve BR(M,θ) ile gösterilir. Bu çalışmada, bir sonlu M monoidinin Bruck-Reilly genişlemesinin ikinci tamsayı homolojisinin, öyle bir k∈N için
H_2 (BR(M,θ))=H_2 (M)×Z^k
olduğu gösterilmiştir.Let M be a monoid and let θ be an endomorphism on M. Then the set N^0×M×N^0 where N^0 is the set of non-negative integers, is a monoid together with the binary operation
(m,a,n)(p,b,q)=(m-n+r,(aθ^(r-n) ) (bθ^(r-p) ),q-p+r)
where r=max{n,p} and θ^0 is the identity map on M, which is called the Bruck-Reilly extension of M determined by θ and denoted by BR(M,θ). In this paper, we show that the second integral homology of Bruck-Reilly extension of a finite monoid M is
H_2 (BR(M,θ))=H_2 (M)×Z^k
for some k∈N
Half-time and high-speed running in the second half of soccer [response to R. Lovell’s and M. Weston’s Letter to the Editor]
No full textThis study investigated if the quantity of high-speed running (movements >15 km.h-1) completed in the first 15 minutes of competitive football matches differed from that completed in the corresponding 15 minutes of the second half. Twenty semi-professional soccer players (age 21.2 ± 3.6 years, body mass 76.4 ± 3.8 kg, height 1.89 ± 0.05 m) participated in the study. Fifty competitive soccer matches and 192 data files were analysed (4 ± 2 files per match) using Global Positioning Satellite technology. Data were analysed using 2-way repeated measures ANOVA and Pearson correlations. No differences were found between the first 15 min of each half for the distance completed at high-speed (>15 km.h-1) or sprinting (>21 km.h-1), or in the number of sprints undertaken (p>0.05). However, total distance covered was shorter (1st half vs. 2nd half: 1746 ± 220 vs. 1644 ± 224 m; p<0.001) and mean speed lower (1st half vs. 2nd half: 7.0 ± 0.9 vs. 6.6 ± 0.9 km.h-1; p<0.001) in the first 15 min of the second half compared to the first. The correlations between the duration of the half-time interval and the difference in the high-speed running or sprinting between first and second halves (0-15 min) were very small (r=0.08 [p=0.25] and r=0.04 [p=0.61] respectively). Therefore, this study did not find any difference between the amount of high-speed running and sprinting completed by semi-professional soccer players when the first 15 minutes of the first and second half of competitive matches were compared The maintenance of high-speed running and sprinting, as total distance and mean speed declined, may be a function of the pacing strategies adopted by players in competitive matches
Additive archaeology: The spirit of virtual archaeology reprinted
No full textArchaeologists in the 1980s were embracing wholeheartedly the rapidly expanding field of computer modelling, hypertext and visualisation as vehicles for dataexploration. Against this backdrop ‘virtual archaeology’ was conceived. The term was originally intended to describe a multi-dimensional approach to the modelling of the physical structures and processes of field archaeology. It described some ways in which technology could be harnessed in order to achieve new ways of experiencing, documenting, interpreting and annotating primary archaeological materials and processes. Despite its initial promise, virtual archaeology failed to have the impact upon archaeological fieldwork which might have been expected. While the archaeological record is now primarily digital, its sections, plans, drawings and photographs are facsimiles of the analogue technologies which preceded them. This retention of analogue conventions is increasingly out of step with the general prevalence of digital technologies and especially 21st century advances in 'additive manufacturing', popularised through 3D printers, which could bring the world of virtual archaeology into closer alignment with the material one.This paper will set out to demonstrate that in spite of technological developments much of the theoretical infrastructure which underpinned virtual archaeology remains as relevant today as it was when the term was first conceived. Through an analysis of rapidly developing additive manufacturing technology, this paper will demonstrate the need to move beyond passive technological appropriation and towards the development of authentically archaeological approaches to technolog
On finite presentability of Bruck-Reilly extensions of a monoid with respect to an endomorphism and its powers
No full textLet M be a monoid and let theta be an endomorphism of M. We prove that if the Bruck-Reilly extension BR(M, theta) is finitely presented, then the Bruck-Reilly extension BR(M, theta(m)) is also finitely presented for all m >= 1.</p
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