35,862 research outputs found
Letter from Carl Hayden to George W. P. Hunt
No full textLetter from Carl Hayden to Governor George W. P. Hunt asking the governor to submit the idea of a national park near the rim of the Grand Canyon to the state legislature during the special session. Hayden mentions the state of Arizona would be charged about 1.25 an acre. W. W. Bass and Bass Camp are also included in the letter
Letter from George W. P. Hunt to President Calvin Coolidge
No full textLetter from Governor George W. P. Hunt to Calvin Coolidge arguing for more autonomy in Arizona state matters
Optimization based control of boundary layer transition: Theory and experimentation
No full textSummary form only given. The use of suction to reduce the drag force on an aircraft will, of course, only be worth doing if the energy saved is greater than the energy required to drive the suction system. In particular, it is possible to suck too hard and hence the suction system consumes more energy than it saves. Hence if we wish to achieve a specified transition position (dictated by the aerodynamics of the implementation) we must seek the suction distribution which achieves the desired result for the minimum energy cost. Also it is highly desirable not just to show an energy profit but to maximize it. Given these requirements, the route to design is obviously via an appropriately formulated nonlinear constrained optimization problem and in the work to-date we have used a number of methods of solving such problems, namely gradient descent based algorithms, genetic algorithms, simulated annealing. In this presentation, we will cover the following aspects; background and problem formulation; solution algorithms and relative performance comparisons; experimental facilities and comparisons of predicted and measured performance; and on-going researc
Letter from George W. P. Hunt to Carl Hayden
No full textLetter from Governor George W. P. Hunt to Carl Hayden expressing his support for legislation that would grant National Park status to the Grand Canyon
Adontorhina similis Barry & McCormack, new species
No full textAdontorhina similis, Barry & McCormack, new species (Figures 4–5) Mendicula pygmaea Oliver & Killeen (2002, p. 56–58, plate 23) Thyasira subtrigona Hartley (1984, p. 192) Type locality. Porcupine Bank, 53 °07.77’N, 13 ° 13.37 ’W, 252 m Eastern Atlantic. Holotype. A complete shell, collected by P.J. Barry, NMINH. 2006.58. Measurements (Length x height x breadth). 1.14 mm x 0.78 mm x 0.62 mm. Paratypes. Three specimens, as holotype, NMINH.2006.64.1– 2. Measurements 1.25 mm x 0.94 mm x 0.6mm; 1.17 mm x 0.91 mm x 0.6 mm; 0.91 x 0.69 x 0.44 mm. Etymology. From the Latin similis, ‘similar,’ referring to the high degree of similarity in external appearance to Mendicula pygmaea. Material examined. CEO 3, Station GT, 54 ° N, 12 ° 24 ’W, 320 m 2 spec.; CEO 3 Station 9, 52° 30 ’N, 14 °W, 300 m 11 spec.; SFO 3 Grab 7, 53°07.77’N, 13 ° 13.37 ’W 252 m 6 spec.; SFO 3 Grab 8, 53°07.77’N, 13 ° 13.37 ’W 252 m 5 spec.; SFO 3 Grab 15, 52° 52.42 ’N, 12 ° 26.52 ’W 382 m 8 spec.; SFO 3 Grab 17, 52° 38.77 ’N, 12 ° 11.08 ’W 330 m 4 spec.; NMWZ. 2001.097, ERT 92 /082A 60 ° 36 ’N, 01° 39 ’E 130–145 m 200 spec.; Distribution. Porcupine Bank, west of Ireland. Depth range 252– 382 m. North Sea oilfields. Depth range 85–161 m (Oliver & Killeen, 2002). Description. Shell minute (maximum size 2 mm), fragile, moderately compressed, colour white; subovate, longer than high (Figure 4); inequilateral, beaks in posterior; very thin, transparent periostracum; sculpture of weak commarginal striae; sulcus absent, posterior flank flattened; umbones inflated, pronounced, prosogyrate; prodissoconch I approximately 150 µm in diameter; lunule indistinct; escutcheon obscure; anterodorsal margin weakly curved, straight in some specimens, anterior broadly rounded; posterior markedly angulate; posterodorsal margin straight, sloping; hinge plate thin, divided into two sections, anterior section thicker, both with irregular granules (Figure 4 C–D, F–H); small cardinal tubercle in the right valve with a corresponding depression in the left valve. Internal anatomy. The anterior adductor muscle is larger than the posterior muscle (Figure 5); both muscles are divided into quick and catch areas; anterior muscle is elongate, while the posterior is round. Single point of mantle fusion occurs beneath the gill axis, forming the posterior aperture; mantle folds thin and extended, particularly the middle fold which is filled with glandular tissue; all mantle folds have a small area of concentric muscle within their tips; centre of the mantle edge has a single strand of radial muscle but is otherwise filled with a large blood space; inner mantle is fold compressed, with a poorly defined rejection tract; on the inner surface of the mantle edge between the inner and middle folds, the area has small underdeveloped lobes or folds; periostracal groove deep. There is no region of glandular tissue underneath the anterior adductor muscle. Each gill has a single demibranch comprised of ten to eleven filaments; ascending lamellae three quarters the length of the descending lamellae; filaments thin with well-developed eu-laterofrontal cilia; gill filaments type 2 (Dufour, 2005); where interfilamentar fusion occurs, the abfrontal areas and blood space remains wide and forms a strong connection; filamentar muscles absent. Labial palps relatively large, triangular. Oesophagus thickened, leading into a very large stomach. Hindgut loops above the stomach and descends around the outside of the posterior adductor muscle. Lateral pouches undivided, unlobed and end in a pointed tip ventrally; there are two tubules leading into the pouches. Kidneys paired, small. Foot short with a well developed heel; ventral portion of the heel contains glandular tissue which continues out to the tip of the foot; heel sagittally grooved; tip of the foot is undifferentiated from the heavily ciliated stem. Differential diagnosis. The sharp angle created by the posterior shell margin in combination with the flattened posterior flank differentiates Adontorhina similis from other Adontorhina species. A. similis is similar to Adontorhina lynnae Valentich Scott, 2000; however, A. lynnae has larger, prominent umbones and a more densely granulated hingeplate. Internally, A. lynnae differs in having almost double the number of gill filaments in each demibranch and the labial palps are far more reduced than those in A. similis. The lateral pouches are larger and develop lobes on the posterior surface while the lateral pouches of A. similis are relatively smooth and simple. Further features which separate A. similis from other species of Adontorhina can be found in Table 1. Remarks. Oliver & Killeen (2002) were the first to recognise the irregular granules in this species but declined to erect a new species. Specimens of Mendicula pygmaea Verrill & Bush, 1898, from the east coast of America were not available for them to examine. Examination of the holotype of M. pygmaea (Figure 6) and fresh material from the northwest Atlantic for the present study confirmed the lack of teeth in M. pygmaea (Figure 7). However, the European specimens, previously identified as M. pygmaea, have irregular granules on the hinge plate (Figure 4 C–D, F–H), a feature which precludes inclusion in Mendicula. Furthermore, examination of the internal anatomy has shown additional differences between these species. The adductor muscles of M. pygmaea are smaller than those in A. similis as are the lateral pouches. The foot of M. pygmaea does not contain as well-developed a heel as that of A. similis. M. pygmaea from the northwest Atlantic remains a valid species, however, the European form can no longer be recognised as M. pygmaea and is here described as Adontorhina similis. Oliver & Killeen (2002) reported that specimens which had previously been recorded as Thyasira subtrigona Jeffreys, 1858, by Hartley (1984) were actually specimens of A. similis (although Oliver & Killeen listed them as Mendicula pygmaea). The type specimen of Thyasira subtrigona was destroyed (Jeffreys, 1864) and has been considered a nomen dubium by van Aartsen & Carrozza (1997). Other authors have recognized T. subtrigona as a member of the superfamily Galeommatoidea (Bowden & Heppell, 1968; Oliver & Killeen, 2002).Published as part of Barry, Peter J. & Mccormack, Grace P., 2007, Two new species of Adontorhina Berry, 1947 (Bivalvia: Thyasiridae) from the Porcupine Bank, off the west coast of Ireland, pp. 37-49 in Zootaxa 1526 on pages 42-46, DOI: 10.5281/zenodo.17753
Letter from Carl Hayden to George W. P. Hunt
No full textLetter from Carl Hayden to George W. P. Hunt outlining the proposed national park boundaries and the cost of a township if the state of Arizona decided to acquire one on the rim of the Grand Canyon
Adontorhina keegani Barry & McCormack, new species
No full textAdontorhina keegani Barry & McCormack, new species (Figures 1–3) Type locality. Porcupine Bank, 53 ° 29.9 ’N, 13 ° 59.9 ’W, 300 m Eastern Atlantic. Holotype. A complete shell, collected by P.J. Barry (10 / 11 /03), NMINH. 2006.57 Measurements (Length x height x breadth) 0.94 mm x 0.7 mm x 0.38 mm. Paratypes. Three complete shells, as holotype, NMINH.2006.64.1– 4. Measurements 0.6 mm x 0.42 mm x 0.3 mm; 0.73 mm x 0.55 mm x 0.35; 0.68 mm x 0.49 mm x 0.33 mm. Two paratypes prepared for electron microscopy, NMINH. 2006.65. Measurements 0.92 mm x 0.7 mm x 0.37 mm. NMW.Z. 2007.008. Measurements 0.98 mm x 0.76mm x 0.5 mm. Etymology. Named after Professor Brendan F. Keegan in recognition of his contribution to marine science studies in Ireland over many years. Material examined. CEO 3 Station 8 52 ° 59.9 ’N, 13 ° 59.9 ’W, 191.6 m, 4 specimens; CEO 3 Station 0 9, 53° 29.9 ’N, 13 ° 59.9 ’W, 300 m, 3 specimens; CEO 4 Station 0 5, 52° 59.9 ’N, 12 ° 44.9 ’W, 789 m, 8 specimens. Distribution. Found in muddy sand on the Porcupine Bank, West of Ireland, on either side of the highest point of the bank. Depth range 300 – 789 m. Shell description. Shell minute, maximum length to 0.98mm, fragile, compressed; elongate oval, length / height ratio of 1.2-1.36; inequilateral, anterior end longer; anterodorsal margin straight initially, rising above the horizontal plane before descending into broadly rounded anterior; ventral margin weakly curved until intersected by the weak posterior sulcus; umbones small, sunken, orthogyrate; prodissoconch I approximately 130 µm in diameter; lunule obscure, with raised commissure; escutcheon obscure; periostracum thin, lightly straw coloured; surface smooth near the umbones, thickened commarginal striae towards the margins, radial striae few, confined to the posterior (Figure 1 A); colour white, transparent in juveniles; ligament mostly internal, on a sunken plate, one third the length of the dorsal margin; hinge plate composed of two sections (Figure 1 E), anterior section thinner than posterior section. Irregular granules visible in both valves, anterior and posterior to the beak; directly below the beak, hinge plate is not visible. Internal anatomy. Both adductor muscles are relatively large, the posterior muscle is rounded but with a tapered ventral end; both muscles are divided into quick and catch areas (Figure 2); anterior muscle much larger than the posterior. There is a single point of mantle fusion to form the posterior exhalent aperture. The mantle is thin, and contains a small glandular area below the anterior adductor muscle; inner mantle fold not expanded, with a small cluster of gland cells overlain by a thin layer of radial muscle; rejection tract wide and shallow; middle and outer mantle folds very short, forming a shallow periostracal groove. Each gill has a single demibranch, comprised of seven to eight filaments; gill filaments type 2 (Dufour, 2005); filaments short but laterally expanded with well developed filamentar muscles; latero-frontal cilia well developed; interfilamentar junctions occur. Labial palps small, positioned near the end of the proximal oral groove; groove very long, wide. Oesophagus short, descending into a small stomach. Hindgut loops very high before descending along the posterior margin, through the pericardium, becoming markedly widened as it descends down to the posterior adductor muscle. The lateral pouch is very small (in contrast to most other thyasirids); just visible underneath the anterior end of the gill filaments with one marked indentation in its surface; pouch unlobed, not divided. Digestive gland and kidney large (consistent with the other species in the Thyasiridae). Foot short and well ciliated, the cilia extending back over the heel; tip of the foot very narrow and pointed; heel very well developed as are the pedal retractor muscles; heel large, extending very far down into the mantle cavity; heel sagittally grooved; pedal retractor muscles well developed. Differential diagnosis. The distinctive biangulate posterior shell margin separates Adontorhina keegani from other Adontorhina species. Also, A. keegani is markedly smaller than other species of Adontorhina which are usually 1.5 to 3 mm in diameter (Scott, 1986). The internal anatomy appears reduced compared to other Adontorhina species, with few gill filaments to each demibranch and small lateral pouches. The hindgut of A. keegani is greatly expanded in comparison with most other thaysirid species. Further features which separate A. keegani from other Adontorhina species can be found in Table 1. Remarks. Hydroids were found growing on the valves of living specimens of A. keegani (Figure 3). Only one specimen out of fifteen was recorded as being free of epifauna. Most of the specimens had a disproportionate grouping of hydroids on the posterodorsal margin. The hydroids on the posterior were always the largest and in some cases, grew to double the length of the shell they were attached to. Smaller hydroids were observed on the ventral and anterior margins. The occurrence of this epifauna was limited to the vertical axis of the shell, present only where the margins meet. Adontorhina Adontorhina Adontorhina Adontorhina Adontorhina cyclia sphaericosa lynnae keegani similisPublished as part of Barry, Peter J. & Mccormack, Grace P., 2007, Two new species of Adontorhina Berry, 1947 (Bivalvia: Thyasiridae) from the Porcupine Bank, off the west coast of Ireland, pp. 37-49 in Zootaxa 1526 on pages 39-42, DOI: 10.5281/zenodo.17753
Genuine memoirs of the celebrated Miss Maria Brown [electronic resource] : Exhibiting the life of a courtezan, in the most fashionable scenes of dissipation. Published by the author of a W** of P*** In two volumes.
No full textAuthor of a W** of P*** [Woman of Pleasure] = John Cleland, to whom this work is sometimes attributed.Electronic reproduction.English Short Title Catalog,Reproduction of original from British Library
Dr. Edward P. Wimberly, ITC, July 2011
No full textThis video is a conversation with Dr. Edward P. Wimberly. Dr. Wimberly talks about his book, "No Shame in Wesley's Gospel: A Twenty-First Century Pastoral Gospel". Brad Ost, AUC Woodruff Library, is the interviewer
Estimating the asbestos-related lung cancer burden from mesothelioma mortality.
No full textBACKGROUND: Quantifying the asbestos-related lung cancer burden is difficult in the presence of this disease's multiple causes. We explore two methods to estimate this burden using mesothelioma deaths as a proxy for asbestos exposure. METHODS: From the follow-up of 55 asbestos cohorts, we estimated ratios of (i) absolute number of asbestos-related lung cancers to mesothelioma deaths; (ii) excess lung cancer relative risk (%) to mesothelioma mortality per 1000 non-asbestos-related deaths. RESULTS: Ratios varied by asbestos type; there were a mean 0.7 (95% confidence interval 0.5, 1.0) asbestos-related lung cancers per mesothelioma death in crocidolite cohorts (n=6 estimates), 6.1 (3.6, 10.5) in chrysotile (n=16), 4.0 (2.8, 5.9) in amosite (n=4) and 1.9 (1.4, 2.6) in mixed asbestos fibre cohorts (n=31). In a population with 2 mesothelioma deaths per 1000 deaths at ages 40-84 years (e.g., US men), the estimated lung cancer population attributable fraction due to mixed asbestos was estimated to be 4.0%. CONCLUSION: All types of asbestos fibres kill at least twice as many people through lung cancer than through mesothelioma, except for crocidolite. For chrysotile, widely consumed today, asbestos-related lung cancers cannot be robustly estimated from few mesothelioma deaths and the latter cannot be used to infer no excess risk of lung or other cancers
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