7,417 research outputs found
uCRM: undeflected Common Research Model
No full textThe zip files below contain the aerodynamics and structural geometries, meshes, and other data files for two open models for high-fidelity wing aerostructural studies.
uCRM-9: A flexible version of NASA’s Common Research Model configuration (https://commonresearchmodel.larc.nasa.gov/)
uCRM-13.5: A higher aspect ratio version for very flexible wing design studies
A full explanation of how these models were developed can be found in reference [1]. If you use the model, please cite the paper.
The goal of these models is to provide a common benchmark for aerostructural analysis and design optimization of transonic flexible wing aircraft. These models were already used in various studies [2-5]. The methods used in these optimizations were originally described in reference [6].
The flight conditions are actual flight conditions and not the CRM wind tunnel conditions, so the Reynolds number differs. The conditions are:
M = 0.85
CL = 0.5
Altitude = 37,000 ft
uCRM-9: Re = 43,130,072 (Re length 7.01 m)
uCRM-13.5: Re = 35,524,500 (Re length 5.77m)
The files include:
Geometry files for the wing-body-tail configuration of each aircraft (IGES/TIN)
Aerodynamic mesh files for the wing-body-tail configuration of each aircraft, both in multi-block and overset format (CGNS)
Structural mesh files for the aluminum wingbox structure including material properties based on a smeared stiffness blade-stiffened panel approach, external control surface and engine masses, and aerodynamic loads for the nominal cruise (BDF)
Reference solutions using the MACH framework and NASTRAN
All units are in SI (kg/m/s)
References:
1. Brooks TR, Kenway GKW, Martins JRRA. Benchmark Aerostructural Models for the Study of Transonic Aircraft Wings. AIAA Journal. 2018 ;56(7):2840-–2855.
2. Kenway GKW, Martins JRRA. Multipoint High-fidelity Aerostructural Optimization of a Transport Aircraft Configuration. Journal of Aircraft. 2014 ;51(1):144–160.
3. Burdette DA, Martins JRRA. Design of a Transonic Wing with an Adaptive Morphing Trailing Edge via Aerostructural Optimization. Aerospace Science and Technology. 2018 ;81:192–203.
4. Burdette DA, Martins JRRA. Impact of Morphing Trailing Edge on Mission Performance for the Common Research Model. Journal of Aircraft. 2019 ;56:369–384.
5. Brooks TR, Martins JRRA, Kennedy GJ. High-fidelity Aerostructural Optimization of Tow-steered Composite Wings. Journal of Fluids and Structures. 2019 .
6. Kenway GKW, Kennedy GJ, Martins JRRA. Scalable parallel approach for high-fidelity steady-state aeroelastic analysis and adjoint derivative computations. AIAA Journal. 2014 ;52(5):935–951
Enithares atra Brooks
No full textEnithares atra Brooks (Figs. 11, 12, 17, 22) Enithares atra Brooks 1948. J. Kansas Entomol. Soc., 21: 48, fig. 11. Holotype, male, New Guinea, Rigo, Luglio, in SEMC. Material examined. PAPUA NEW GUINEA, Central Prov.: 5 males (holotype and paratypes), 7 females (allotype and paratypes), Rigo, Luglio, 1889, L. Loria (SEMC, USNM ex JTPC); 3 males, 8 females, Owen Stanley Range, trib. to upper Mimani River, 0.8 km. W of Dorobisoro, 500 m., 9°27′39′′S, 147°54′56′′E, water temp. 23.5 °C., 9 October 2003, 08:30–12:30 hrs., CL 7264, D. A. Polhemus (USNM, BPBM); 2 males, 5 females, 2 immatures, Owen Stanley Range, trib. to upper Mimani River, 1.70 km. NE of Dorobisoro, 535 m., 9°27′25′′S, 147°56′15′′E, water temp. 23.5 °C., 7 October 2003, 13:00–15:00 hrs., CL 7260, D. A. Polhemus (USNM, BPBM). Milne Bay Prov.: 1 male, 9 females, headwater reach of Goilayoli River above crossing on road from Watunou to Huhuna, 11.5 mi. ENE of Alotau, 275 m., 10°18′43′′S, 150°37′16′′E, 6 April 2002, 10:00–13:00 hrs., CL 7161, D. A. and J. T. Polhemus (USNM); 7 females, Pini Range, spring and streamlet nr. old Duabo mission station, 300 m., 10°25′05′′S, 150°18′24′′E, water temp. 25° C., 9 April 2002, 14:00–15:00 hrs., CL 7170, D. A. and J. T. Polhemus (USNM, BPBM); 3 females, Sagarai River basin, Bwaona River, E. of Mila village, 90 m., 10°30′14′′S, 150°18′50′′E, water temp. 27–29° C., 7 April 2002, 10:45–12:45 hrs., CL 7165, D. A. and J. T. Polhemus (USNM); 6 males, 2 females, Cloudy Mountains, headwater tributary to upper Watuti River, S. of Gelemalaia village, 715 m. 10°29′50′′S, 150°13′58′′E, water temp. 22° C., 10 April 2002, 16:00–17:30 hrs., CL 7175, D. A. Polhemus (USNM, BPBM); 2 males, Cloudy Mountains, rocky stream 0.6 mi. above Gadowalai village, S. of Gelemalaia, 135 m., 10°28′57′′S, 150°14′27′′E, water temp. 24.5° C., 12 April 2002, 10:00–10:30 hrs., CL 7176, D. A. Polhemus (USNM, BPBM); 9 males, 21 females, Engineer Group, Tubetube Island, small stream above Samoa, 15– 45 m., 10°35′03′′S, 151°11′36′′E, water temp. 28° C., 19 January 2004, 09:00–10:30 hrs., CL 7299, D. A. and J. T. Polhemus (USNM, BPBM). Discussion. Enithares atra was originally described from a series of 12 specimens taken by Loria at in the Rigo district, along the south coast of New Guinea southeast of Port Moresby. Brooks (1948) stated that the type series of E. atra was in USNM, but Lansbury did not find it there, and Byers later confirmed to him by correspondence that it was in Kansas at SEMC. Thus, when preparing his monograph, Lansbury did not see the actual holotype of this species, but only one male paratype. He instead based his re-description on material from Lae and Finschhaven, localities lying on the north coast of New Guinea far from from the original Rigo type locality. A disjunct distribution of this type is quite atypical for most species of aquatic Heteroptera in New Guinea, which led the author to suspect that Lansbury (1968) may have misinterpreted the species concept for E. atra. A comparison of Brooks’ (1948) Figure 11 to material collected by the author in the vicinity of Dorobisoro in the Rigo District, near to the original type locality, shows that the male genitalic structures match well, particularly in regard to the shape of the slender, tapering LABP, which is partially depicted by Brooks. A more detailed illustration of the male genitalia for one of these more recently collected E. atra specimens is provided in Fig. 17. Lansbury (1968) also did not indicate which specimens he made his illustrations from, although there are three possibilities based on the material he listed: a male paratype from Rigo at BMNH; a male and female from Lae in Oxford; or a series of 5 males and 9 females from Finschhafen in the South Australian Museum. The genitalia of male specimens collected more recently by the author in the vicinity of Madang match Lansbury’s figures, particularly in regard to shape of the LABP, which terminates in a slightly expanded, truncate apex (Fig. 17, compare to Fig. 273 in Lansbury 1968), so it is clear that he illustrated a north coast male, from either the Finschhafen or Lae series. These north coast populations are in fact an undescribed species, treated herein as E. orsaki n. sp. As now understood, E. atra is a lowland species occurring in the southern foothills of the Papuan Peninsula, and ranging eastward through the islands east of Milne Bay as far as Tubetube, in the Engineer Group (Fig. 22). All previous records of this species from the north coast of New Guinea, including those in Lansbury (1968), are referable to E. orsaki n. sp. (see following description and discussion). Based on verified collections, E. atra occupies the South Papuan Peninsula Foreland area of freshwater endemism (Area 30) as defined by D. Polhemus & Allen (2007).Published as part of Polhemus, Dan A., 2020, Nine new species of Enithares (Heteroptera: Notonectidae) from New Guinea, with distributional notes on other species and an updated world checklist, pp. 132-182 in Zootaxa 4772 (1) on pages 137-138, DOI: 10.11646/zootaxa.4772.1.5, http://zenodo.org/record/381407
Enithares malayensis Brooks 1948
No full text<i>Enithares malayensis</i> Brooks <p> <i>Enithares malayensis</i> Brooks 1948: 38</p> <p> <b>Material examined</b>. MALAYSIA, <b>Johor</b>: 1 male (dissected), 1 female, Kota Tinggi waterfall, 16 km. N. of Kota Tinggi, 115 m., [1°49′50′′N, 103°49′57′′E], 13 August 1985, CL 2056, J. T. Polhemus and D. A. Polhemus (USNM). <b>Selangor</b>: 2 females, pond along old Gombak road, 23 km. E. of Kuala Lumpur, 16 August 1985, CL 2069, J. T. Polhemus and D. A. Polhemus (USNM). <b>Pahang</b>: 1 male (dissected), 2 females, Lata Iskander waterfall, 18 km. N. of Tapah along Cameron Highlands road, 455 m., [4°19′28′′N, 101°19′29′′E], 18 August 1985, CL 2074, J. T. Polhemus and D. A. Polhemus (USNM).</p> <p> <b>Discussion</b>. This species is easily recognized by the broadly curving fore tibia in males.</p> <p> <b>Ecological notes</b>. The range of this species includes southern Thailand, the Malay Peninsula, Singapore and the Riau Archipelago (Lansbury 1968, Nieser <i>et al</i>. 2008), and it would seem likely that it occurs on intervening Sumatra as well.</p>Published as part of <i>Polhemus, Dan A., 2020, Nine new species of Enithares (Heteroptera: Notonectidae) from New Guinea, with distributional notes on other species and an updated world checklist, pp. 132-182 in Zootaxa 4772 (1)</i> on page 175, DOI: 10.11646/zootaxa.4772.1.5, <a href="http://zenodo.org/record/3814079">http://zenodo.org/record/3814079</a>
Enithares gibbera Brooks 1948
No full textEnithares gibbera Brooks (Figs. 64, 65) Enithares gibbera Brooks 1948: 51. Material examined. SOLOMON ISLANDS: Guadalcanal Prov.: 9 males, 8 females, Guadalcanal, Charebuma River, above Gold Ridge mine, 390– 460 m., water temp. 23.5° C., 3 August 2005, 11:00–15:00 hrs. 9°36′00′′S, 160°07′23′′E, CL 7421, D. A. Polhemus (USNM, BPBM). Western Prov.: 1 male, 3 females, Kolombangara Is., Vila River, 8.5 km. N. of Ringgi harbor, standing pool in forest, 150 m., 8°02′39′′S, 157°07′16′′E, water temp. 24° C., 20 March 2005, 10:00–13:00 hrs., CL 7397, D. A. Polhemus (USNM, BPBM); 1 male, 1 female, 1 immature, Rendova Is., upper trib. to Toropi River at road crossing 5.5 km. SE of Kenole, 230– 250 m., 8°30′30′′S, 157°18′45′′E, water temp. 26° C., 21 March 2005, 11:30–15:00 hrs. CL 7399, D. A. Polhemus (USNM, BPBM). Malaita Prov.: 1 female, 5 immatures, Malaita Is., Kwarea River at high bridge on road from Auki to Atori, 85 m., 8°39′10′′S, 160°45′33′′E, water temp. 25.5° C., 29 July 2005, 13:30–16:00 hrs., R. L. Englund (BPBM). Discussion. In addition to its distinctive genitalic structures (Fig. 65), E. gibbera may be easily recognized without resorting to dissection by the concave basal tarsal segment on the male foreleg (Fig. 64). Ecological notes. This species is endemic to the Solomon Islands, and was previously recorded from the islands of Guadalcanal and Makira (Brooks 1948, Lansbury 1968). Additional records are now provided for the islands of Kolombongara, Rendova and Malaita, as well as a further record for Guadalcanal. It is likely that this species occurs on all of the large, high islands in the Solomons archipelago. A more extensive discussion of the sites at which this species was collected can be found in D. Polhemus et al. (2008).Published as part of Polhemus, Dan A., 2020, Nine new species of Enithares (Heteroptera: Notonectidae) from New Guinea, with distributional notes on other species and an updated world checklist, pp. 132-182 in Zootaxa 4772 (1) on page 164, DOI: 10.11646/zootaxa.4772.1.5, http://zenodo.org/record/381407
Enithares buhleri Brooks 1948
No full text<i>Enithares buhleri</i> Brooks <p> <i>Enithares buhleri</i> Brooks 1948: 43.</p> <p> <b>Material examined</b>. INDONESIA, <b>Nusa Tenggara Timur Prov.</b>, Timor: 1 male, 1 immature, spring and stream at Oe Hala, 10 km. N. of Soe, 685 m., 9°48′12′′S, 124°18′33′′E, water temp. 24° C., 11 September 1991, CL 2593, D. A. Polhemus & J. T. Polhemus (BPBM); 1 male, 2 females, Kab. Timor Tengah Kidul, Kec. Polen, spring and stream at Oe Noah, nr. Polen, 23 km. NE of Soe, 840 m, vic. 9°40′03′′S, 124°29′20′′E, water temp. 21° C., 12 Sept. 1991, CL 2594, D. A. Polhemus & J. T. Polhemus (BPBM); 2 males, 1 female, spring at Oe Noulle, 9 km. N. of Soe, 685 m., water temp. 25.5° C., 12 Sept. 1991, CL 2596, D. A. Polhemus & J. T. Polhemus (BPBM). EAST TIMOR,</p> <p> <b>Ainaro Dist</b>.: 3 males, 2 females, spring in native eucalyptus forest along road to Turiscai, 4.7 km. N. of Maubisse, 1390 m., 8°49′09′′S, 125°38′18′′E, water temp. 19° C., 12 November 2003, 16:00–17:00 hrs. and 13 November 2003, 08:00–09:00 hrs., D. A. Polhemus (USNM); 1 male, 1 female, Ainaro Dist., Saru River below road, 1 km. SW of Maubisse, 1240–1285 m., 8°50′15′′S, 125°35′32′′E, water temp. 20 °C., 2 September 2004, 12:30–15:30 hrs., CL 7312, D. A. Polhemus (USNM); 1 male, Lautem Dist., Irasiquero River at gauging station, 20 km. NE of Lospalos, 305 m., 8°28′20′′S, 127°10′08′′E, water temp. 26 °C., 19 November 2003, 09:30–12:30 hrs., CL 7276, D. A. Polhemus (USNM); 2 males, 6 females, Lautem Dist., Tchino River at bridge, 10.5 km. S. of Lospalos on Iliapa road, 105 m., 8°35′20′′S, 126°59′40′′E, water temp. 29 °C., 20 November 2003, 08:30–11:00 hrs., CL 7277, D. A. Polhemus (USNM, BPBM);</p> <p> <b>Discussion</b>. <i>Enithares buhleri</i> occurs syntopically with <i>E. timorensis</i> throughout the island of Timor, but in the experience of the author is generally less abundant at any given site. It may be easily separated from <i>E. timorensis</i> by its rounded and spatulate metaxiphus, which assists in sorting mixed series of the two taxa. It is also generally larger-sized and darker colored than <i>E. timorensis</i>. The typical habitat for both species is upland pools along springfed streamlets emerging from limestone bedrock.</p>Published as part of <i>Polhemus, Dan A., 2020, Nine new species of Enithares (Heteroptera: Notonectidae) from New Guinea, with distributional notes on other species and an updated world checklist, pp. 132-182 in Zootaxa 4772 (1)</i> on pages 168-169, DOI: 10.11646/zootaxa.4772.1.5, <a href="http://zenodo.org/record/3814079">http://zenodo.org/record/3814079</a>
Open access self-archiving: An author study
No full textThis, our second author international, cross-disciplinary study on open access had 1296 respondents. Its focus was on self-archiving. Almost half (49%) of the respondent population have self-archived at least one article during the last three years. Use of institutional repositories for this purpose has doubled and usage has increased by almost 60% for subject-based repositories. Self-archiving activity is greatest amongst those who publish the largest number of papers. There is still a substantial proportion of authors unaware of the possibility of providing open access to their work by self-archiving. Of the authors who have not yet self-archived any articles, 71% remain unaware of the option. With 49% of the author population having self-archived in some way, this means that 36% of the total author population (71% of the remaining 51%), has not yet been appraised of this way of providing open access. Authors have frequently expressed reluctance to self-archive because of the perceived time required and possible technical difficulties in carrying out this activity, yet findings here show that only 20% of authors found some degree of difficulty with the first act of depositing an article in a repository, and that this dropped to 9% for subsequent deposits. Another author worry is about infringing agreed copyright agreements with publishers, yet only 10% of authors currently know of the SHERPA/RoMEO list of publisher permissions policies with respect to self-archiving, where clear guidance as to what a publisher permits is provided. Where it is not known if permission is required, however, authors are not seeking it and are self-archiving without it. Communicating their results to peers remains the primary reason for scholars publishing their work; in other words,
researchers publish to have an impact on their field. The vast majority of authors (81%) would willingly comply with a mandate from their employer or research funder to deposit copies of their articles in an institutional or subject-based repository. A further 13% would comply reluctantly; 5% would not comply with such a mandate
White Spruce above and Beyond Treeline in the Arrigetch Peaks Region, Brooks Range, Alaska
No full textWhite spruce trees occur in the Arrigetch Creek valley and its tributaries at great distances above and beyond current treeline, which is at 760 m elevation. The highest tree found is at 1465 m elevation on a south-facing limestone slope. Trees also occur up to 5.0 km beyond treeline on granitic parent rock. These trees appear to occur at the highest elevation north of the Arctic Circle in North America and include some of the highest trees in Alaska.Key words: Brooks Range, Alaska, treeline, white spruce, seed dispersalMots clés: chaîne de Brooks, Alaska, limite forestière, épicéa blanc, dispersion des graine
Progress of international hydrogen production network for the thermochemical Cu–Cl cycle
No full textThis paper presents recent advances by an international team which is developing the thermochemical copper–chlorine (Cu–Cl) cycle for hydrogen production. Development of the Cu–Cl cycle has been pursued by several countries within the framework of the Generation IV International Forum (GIF) for hydrogen production with the next generation of nuclear reactors. Due to its lower temperature requirements in comparison with other thermochemical cycles, the Cu–Cl cycle is particularly well matched with Canada's Generation IV reactor, SCWR (Super-Critical Water Reactor), as well as other heat sources such as solar energy or industrial waste heat. In this paper, recent developments of the Cu–Cl cycle are presented, specifically involving unit operation experiments, corrosion resistant materials and system integration.Atomic Energy of Canada LimitedOntario Research Excellence FundNatural Sciences and Engineering Research Council of CanadaUniversity Network of Excellence in Nuclear Engineering (UNENE)Canada Research Chairs progra
ŻYCIE UKRYTE W SŁOWIE. "BEKSIŃSCY. PORTRET PODWÓJNY" MAGDALENY GRZEBIAŁKOWSKIEJ W ŚWIETLE POSTSTRUKTURALIZMU
No full textLife Hidden in Words. Magdalena Grzebiałkowska\u27s "Beksińscy. Portret podwójny" and Poststructuralism
The article analyzes Magdalena Grzebiałkowska\u27s biographical "Beksińscy. Portret podwójny" which focuses on the lives of Zdzisław Beksiński and Tomasz Beksiński. The author looks at the construction of the biography and its relationship to poststructuralism, which allows for an appreciation of the literary features of the book. He points to how the specificity of the content, language, a mode of narration in Grzebiałkowska\u27s book make it a full-fledged literary work itself. As such the book departs from a typical biographical scheme. Juxtaposing the book with poststructural ideas leads to the reconsideration of the role of the author in the process of shaping of a biographical narrative
Pancreatic secretion in vitro in "Cl<sup>–</sup>-free," "CO<sub>2</sub>-free," and low-Na<sup>+</sup> environment
No full text Pages 790–796: S. S. Rothman and F. P. Brooks. "ug/hr" should read "mg/hr" wherever present. </jats:p
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