1,503,386 research outputs found
Nonlinear aeroelastic simulation of a full-span aircraft with oscillating control surfaces
No full textIn this paper, the transonic and low-supersonic aeroelastic behavior of the generic fighter model was investigated in the time domain. The simulation of flutter flight test using forced harmonic motion of control surfaces including inertial coupling effects was conducted at the various conditions. The detailed dynamic aeroelastic responses are computed using a coupled time-marching method based on the effective computational structural dynamic and computational fluid dynamics techniques. The nonlinear aerodynamic effects due to an existing shock wave on the lifting surfaces were considered using a transonic small disturbance equation. A modal model obtained by a free vibration analysis was used for the structural model. The relations between the computed flutter boundary and the simulation results of the responses using the harmonic motions of control surfaces at various conditions were investigated.This work was partially supported through funding from the National
Research Laboratory Program and the research project
from Korea Aerospace Industry ~KAI!. The writers would like to
acknowledge their support
Borestus costatus Yoo
No full textBorestus costatus Yoo PI. 10 figs 1-5 Borestus costatus Yoo, 1988: 242, figs 25-28. Additional material. 3 specimens from south-east of 'Rangari' (Locality 18), 2 from Swains Gully (Locality 25), 4 from 'Marohn' (Locality 28), 3 from Glenbawn (Locality 31). Geographic distribution. 'Rangari' to Glenbawn. Geological age. Early to late Toumaisian.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on page 80, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
Naticopsis (Naticopsis) osbornei Yoo
No full textNaticopsis (Naticopsis) osbornei Yoo PI. 14 Figs 1-8 Naticopsis (Naticopsis) osbornei Yoo, 1988: 244, figs 65-66. Additional material. 8 specimens from 'Marohn' (Locality 28) and 1 specimen from G1enbawn (Locality 30). Geographic distribution. 'Rangari' to Glenbawn. Geological age. Middle to late Tournaisian. Remarks. Fifty specimens recovered between 'Rangari' and Glenbawn show a considerable variability in shell shape, ornamentation and callus rugae. Some forms are elongate while others seem distorted. The shape and size of callus are also variable. Specimens are usually ornamented by collabral striae which are more distinct in the last whorl. Plate 14 figure 6 shows stronger striae developed just below the suture of the last whorl.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on pages 82-83, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
Onychochilus minutissimus Yoo 1988
No full textOnychochilus minutissimus Y00 Onychochilus minutissimus Yoo, 1988: 240, figs 12-14. Additional material. 3 specimens (F78356). Remarks. This species is extremely rare and small in size; a total of seven specimens have been recovered from the type locality, including four specimens in previous investigations (Yoo, 1988). The shells exhibit perfectly balanced adult forms with a sharp boundary between protoconch and teleoconch. This species differs from the type species O. physa Lindstrom in being much smaller in size and in lacking ornamentation.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on page 73, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
Hesperiella robertsi Yoo. Apert 1988
No full textHesperiella robertsi Yoo PI. 7 fig. 8 Hesperiella robertsi Yoo, 1988: 241, figs 36-41. Additional material. 34 specimens from the type locality, 16 from various horizons at Glenbawn (Localities 29-31) and 8 from south-east of 'Rangari' (Locality 18). 1 from 'Lorrina' (Locality 23). Geographic distribution. 'Rangari' to Glenbawn. Geological age. Middle to late Tournaisian. Remarks. This species is abundant at Glenbawn, and occurs commonly at 'Rangari', but has not been recovered at Swains Gully (Locality 25). A single specimen recovered at 'Lorrina', from a stratigraphically higher horizon in the Namoi Formation, is here temporarily assigned to this species. Figured specimen (PI. 7 fig. 8) is an immature form.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on page 78, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
Stegocoelia (Stegocoelia) nodosa Yoo. Figured 1988
No full textStegocoelia (Stegocoelia) nodosa Yoo PI. 15 fig. 3 Stegocoelia (Stegocoelia) nodosa Yoo, 1988: 245, figs 67-71. Dimensions. Figured specimen (F78467): H 3.7 mm, W 1.2 mm [table omitted] Additional material. 75 specimens from 'Marohn' (Locality 28), 1 from Swains Gully (Locality 25) and 16 from south-east of 'Rangari' (Locality 18). Geographic distribution. 'Rangari' to 'Marohn'. Geological age. Middle to late Toumaisian.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on pages 83-84, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
Interview with Grace Yoo
No full textDr. Grace Yoo is a Korean American who was raised in southern California and currently teaches in the Asian American Studies Department at San Francisco State University. She has two sons that helped her with the mask-making process during the summer. She also encourages her students to be advocates and get involved with each other and the community.https://digitalcommons.csumb.edu/auntiesewing_interviews/1035/thumbnail.jp
Glabrocingulum obesum Yoo 1988
No full textGlabrocingulum obesum Y00 PI. 6 figs 4-10 Glabrocingulum obesum Yoo, 1988: 241, figs 33-35. [table omitted] Additional material. 30 additional specimens of G. obesum Y00, 1988 were recovered from the type locality and east of Glenbawn Dam (Locality 30). Remarks. The figllred specimens (PI. 6 figs 6, 9, 10) appear to be immature. The specimens (PI. 6 figs 4, 5) have straight whorl profiles with smaller pleural angle, coarser ornamentation and smaller umbilicus, which appears to be relatively mature. This species differs from Glabrocingulum ornatum (Dun & Benson) in having smaller and low-spired shell.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on page 76, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
Loxonema elegantissima Yoo 1988
No full textLoxonema elegantissima Yoo, 1988: 246, figs 84-87. Dimensions. Figured specimens (F78524) H 1.9 mm, W 0.5 mm, NW81,4; (F78523) H 1.6, W 0.5 mm, NW 7 l1z. Additional material. 50 specimens from 'Marohn' (Locality 28), one each from two horizons at Glenbawn (Localities 29 and 31). Remarks: This species occurs commonly at the type locality. Fifty two specimens recovered for this study are extremely well preserved and readily referred to this species.Published as part of Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, pp. 63-120 in Records of the Australian Museum 46 (1) on page 93, DOI: 10.3853/j.0067-1975.46.1994.18, http://zenodo.org/record/465459
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