136,045 research outputs found
World War I record of service survey for Alton G. Wheeler, signed 17 April 1926
No full textQuestionnaire about Alton Grover Wheeler's service in World War I, 1917-1919, signed by Wheeler on 17 April 1926.Questionnaire originally part of a survey of Norwich University alumni conducted by a “Norwich in the World War” committee consisting of Charles N. Barber (chairman), Carl V. Woodbury, K.R.B. Flint, and Gustaf A. Nelson. Data from these questionnaires may have been used in a chapter of "Vermont in the world war, 1917-1919" by Harold P. Sheldon (1928). Transcription by Carina Berg. Transcriptions may be subject to error
Dataset for Spontaneous Raman scattering in hollow core photonic crystal fibres
No full textData for figure 1-3 in the paper:
Wheeler, N. et al (2017). Spontaneous Raman scattering in hollow core photonic crystal fibres. In IEEE Sensors 2017 proceedings.
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Optimal Wheeler Language Recognition
No full textA Wheeler automaton is a finite state automaton whose states admit a total Wheeler order, reflecting the co-lexicographic order of the strings labeling source-to-node paths). A Wheeler language is a regular language admitting an accepting Wheeler automaton. Wheeler languages admit efficient and elegant solutions to hard problems such as automata compression and regular expression matching, therefore deciding whether a regular language is Wheeler is relevant in applications requiring efficient solutions to those problems. In this paper, we show that it is possible to decide whether a DFA with n states and m transitions recognizes a Wheeler language in O(mn) time. This is a significant improvement over the running time of the previous polynomial-time algorithm (Alanko et al. Information and Computation 2021). A proof-of-concept implementation of this algorithm is available in a public repository. We complement this upper bound with a conditional matching lower bound stating that, unless the strong exponential time hypothesis (SETH) fails, the problem cannot be solved in strongly subquadratic time. The same problem is known to be PSPACE-complete when the input is an NFA (D’Agostino et al. Theoretical Computer Science 2023). Together with that result, our paper essentially closes the algorithmic problem of Wheeler language recognition
ESA measurements using the hybrid fibre-optic reflection measurement system
No full textTo be presented at Loughborough Antennas & Propagation Conference, Loughborough, 16th - 17th November 2009Since the introduction of the Wheeler Cap method to measure
the radiation efficiency of an Electrically Small Antenna (ESA), there have
been several techniques presented in literature that have either enhanced
on the method or provided an alternative technique. This paper presents
measurements of the radiation efficiency of an electrically small monopole
using the Hybrid Fibre-Optic RF Reflection Measurement System (HRS)
integrated into the Wheeler Cap. The HRS isolates the ESA from the measurement
system [1]. The ESA’s reflection coefficient can then be measured
with the isolated ESA inside the Wheeler Cap and in freespace to determine
its efficiency. The HRS is also integrated into a far-field measurement
range to measure the far-field radiation pattern of the ESA
Oscinicita hansoni Wheeler, sp. n.
No full textOscinicita hansoni Wheeler, sp. n. (Figs. 8–13) Description: Total length 1.1–1.2mm. Overall colour medium brown; frontal triangle shining, not reaching anterior margin of frons; frons microscopically striate, appearing dull; most setae and setulae on head pale, weak; genal height 0.2 times eye height directly below ventral midpoint of eye, much broader posterior to this (Fig. 8); postgena slightly paler than gena and parafacial; face shining, especially in antennal foveae, darker than rest of head, carina narrow, most pronounced ventrally, spinulose membrane below ventral margin of face continuous with oral cavity; antenna yellow-brown, arista brown; palpus black; proboscis pale. Scutum shining, evenly covered with sparse, pale setulae; notopleural setae stronger and darker than other thoracic setae; scutellum with dense microtrichia giving it a dull appearance, sparse, short, dark apical, subapical and dorsal setae. Legs short, coxae and femora medium brown, tibiae and tarsi yellow. Wing hyaline but with dense microtrichia, veins pale, ratio of costal sectors C 1: C 2: C 3: C 4 – 0.9: 1: 0.6: 0.5. Halter large, Abdomen medium brown. Male genitalia (Figs. 11–13): epandrium approximately as long as high, broad in posterior view, with sparse setae on posterior half; surstylus broadly rounded, projecting ventrally in lateral view, ventral margin dentate, with sparse, fine setae distally; hypandrium relatively narrow; pregonite weakly sclerotized, postgonite clavate, sclerotized marginally, with single ventral seta and 2–3 campaniform sensillae; phallic guide sclerotized, rounded, separated from hypandrium anteriorly; basiphallus long and well-sclerotized, distiphallus shorter than basiphallus, membranous; cerci small ventral projections separated by broad, U-shaped ventral margin, with fine setae; subepandrial sclerite simple, well-sclerotized, strongly projecting dorsally in lateral view. Female unknown. Type material: Holotype ɗ: COSTA RICA: Alajuela: San Pedro de la Tigra, cacao, 200m, Malaise trap, i. 1990, P. Hanson (LEM). Paratypes: 2 ɗ, same data as holotype (LEM). Etymology: The species name is a genitive patronym in honour of Dr. Paul Hanson who collected the type series of this species, along with vast numbers of other Costa Rican Chloropidae. Remarks: The type locality is a cacao plantation, which suggests that this species may be associated with, or at least tolerant of, disturbed habitats. The fact that more specimens have not been encountered despite extensive collecting in other disturbed habitats throughout Costa Rica also raises the possibility that this species may be associated with cacao. Further research is required.Published as part of Wheeler, Terry A., 2007, Two new genera of oscinelline Chloropidae (Diptera) from Costa Rica, pp. 47-53 in Zootaxa 1413 on pages 51-53, DOI: 10.5281/zenodo.17567
Wheeler Languages
No full textThe recently introduced class of Wheeler graphs, inspired by the Burrows-Wheeler Transform (BWT) of a given string, admits an efficient index data structure for searching for subpaths with a given path label, and lifts the applicability of the Burrows-Wheeler Transform from a single string to an entire language. In this paper we study the regular languages accepted by automata having a Wheeler graph as transition function and prove results on determinization, Myhill-Nerode characterization, decidability, and closure properties for this class of languages
Goniaspis versicolor Mlynarek and Wheeler, sp. n.
No full textGoniaspis versicolor Mlynarek and Wheeler, sp. n. (Figs. 24–25) Description: Total length 1.9–2.3 mm. Overall color yellow; frontal triangle black, anteriorly paler, shining, extending to anterior margin of frons with slightly convex margins; ocellar tubercle black, shining; frons yellow, as long as wide; cephalic setae pale, fronto-orbital setae well-developed; gena yellow, microtomentose, 0.1 times eye height; postgena slender, ventrally yellow, black and pollinose; face yellow; scape and pedicel yellow, first flagellomere reniform, yellow, first segment of arista brown, rest of arista black, slender, pubescence twice as long as width of arista at base; palpus, proboscis and clypeus yellow. Scutum yellow, shining, punctate, microtomentose just anterior to scutellum, as long as wide, pronotum black at dorsal insertion with head; scutellum yellow, 1.4–1.6 times as wide as long, rugose, apical scutellar bristles strong, on small tubercles on dorsal margin of scutellum, lateral scutellar bristles longer and darker than surrounding setae; thoracic pleurites shining yellow, dorsal margin of anepimeron and lateral region of postscutellum microtomentose. Legs yellow; hind tibial spur apical, 0.7 times length of first tarsal segment; femoral organ 2 rows of 3 small tubercles; tibial organ oval, brown, 0.25 times length of tibia. Wing hyaline, ratio of costal sectors C 1: C 2: C 3: C 4 – 1: 1.4: 1.7: 0.8; halter white. Abdomen black, microtomentose, anteromedial portion of syntergite 1 + 2 pale; syntergite 1 + 2 slightly shorter than tergites 3 and 4 combined. Male postabdomen (Figs. 24–25): epandrium higher than long in lateral view, wider than high in posterior view, with sparse setae; surstylus short, wide, sides diverging slightly with broadly rounded apex, surstylus with sparse short setae; cercus broad triangular, ventral projection rounded, cercus with sparse setae and one long posteroventral bristle, cerci separated by semi-circular ventral excavation; distiphallus weakly sclerotized. Type material: Holotype 3: “ BOLIVIA: LaPaz / Chulumani, env. 1600m / R. Portugal’s Finca / 16 ° 22 ’S, 67 ° 30 ’W / 30.iv. 1997 s.s. / L. Masner B-07”, “ HOLOTYPE / Goniaspis / versicolor / Mlynarek & Wheeler” (CNC). Paratypes: same data as holotype (13, 1Ƥ, CNC). Etymology: From the Latin versicolor (of different colors) referring to the distinctive color pattern of this species.Published as part of Mlynarek, Julia J. & Wheeler, Terry A., 2009, Revision of the Neotropical genus Goniaspis Duda (Diptera: Chloropidae), pp. 26-40 in Zootaxa 2033 on pages 38-39, DOI: 10.5281/zenodo.18632
Goniaspis opaca Mlynarek and Wheeler, sp. n.
No full text<i>Goniaspis opaca</i> Mlynarek and Wheeler, sp. n. <p>(Figs. 14–15)</p> <p> <b>Description:</b> As in <i>G. obscurata</i> except as follows: male postabdomen (Figs 14–15): epandrium barely wider than high; sides of epandrium parallel in posterior view; cerci somewhat wide; separated by semi-circular ventral excavation.</p> <p> <b>Type material:</b> Holotype 3: “ COSTA RICA: San José: Santo / Domingo de Heredia / InBioParque, sweep veg. / 14.ii.2003, J. Savage”, “ HOLOTYPE / <i>Goniaspis</i> / <i>opaca</i> / Mlynarek & Wheeler” (LEM). Paratypes: ARGENTINA: Tucuman: Lacavera, 23–28.xi.1951, Aczel & Golbach (13, USNM); BRAZIL: Nova Teutonia, 27˚11’S, 52˚23’W, vi.1937, F. Plaumann (13, USNM); COSTA RICA: Puntarenas, San Vito, Estacion Biologica Las Alturas, 1500m, Malaise trap, i.1992, P. Hanson (13, LEM); San Jose, 15.v.1907, H. Schmidt (23, USNM); La Suiza, iv.1922, P. Schild (23, USNM); Turrialba, xi.1922, P. Schild (23, USNM); PERU: Madre de Dios, Manu, Rio Manu, Cocha Salvador, 240m, 14.ix.1988, A. Freidberg (13, USNM).</p> <p> <b>Etymology:</b> From the Latin <i>opacus</i> (dim, obscure), referring to the cryptic characters that distinguish this species from the appropriately named <i>G. obscurata</i>.</p> <p> <b>Remarks:</b> <i>Goniaspis opaca</i> differs from <i>G. obscurata</i> only in the shape of the male epandrium and cerci. Although the morphological differences are minor, they are consistent and we found no intermediates between the two species. The geographic ranges of the two species overlap broadly. Examination of additional specimens of this species complex from across their geographic range would be helpful in resolving their status.</p>Published as part of <i>Mlynarek, Julia J. & Wheeler, Terry A., 2009, Revision of the Neotropical genus Goniaspis Duda (Diptera: Chloropidae), pp. 26-40 in Zootaxa 2033</i> on page 33, DOI: <a href="http://zenodo.org/record/186327">10.5281/zenodo.186327</a>
Goniaspis lucia Mlynarek and Wheeler, sp. n.
No full textGoniaspis lucia Mlynarek and Wheeler, sp. n. (Figs. 8–9) Description: Total length 1.7–2.1 mm. Overall color black; frontal triangle yellow, shining, 0.9–1 times length of frons with straight margins; ocellar tubercle black, shining; frons yellow, as long as wide; cephalic setae dark, fronto-orbital setae well-developed; gena yellow, microtomentose, 0.1 times eye height; postgena slender, black and microtomentose; face yellow; scape and pedicel yellow, first flagellomere reniform, yellow, arista black, slender, pubescence twice as long as width of arista at base; palpus, proboscis and clypeus yellow. Scutum black with humerus and ventral margin of notopleuron yellow, shining, punctate, microtomentose just anterior to scutellum, as long as wide, pronotum brown at insertion with head; scutellum black, 1.6 times as wide as long, rugose, apical scutellar bristles strong, on small tubercles on dorsal margin of scutellum, lateral scutellar bristles longer and darker than surrounding setae; thoracic pleurites mostly shining black; dorsal margin of anepimeron and lateral region of postscutellum microtomentose. Legs yellow; hind tibial spur apical, 0.7 times length of first tarsal segment; femoral organ 2 rows of 3 small tubercles; tibial organ oval, brown, 0.2 times length of tibia. Wing hyaline, ratio of costal sectors C 1: C 2: C 3: C 4 – 1: 1.5: 1.6: 0.6; halter white. Abdomen black, sparsely microtomentose, anteromedial portion of syntergite 1 + 2 pale, desclerotized; syntergite 1 + 2 slightly shorter than tergites 3 and 4 combined. Male postabdomen (Figs. 8–9): epandrium higher than long in lateral view, wider than high in posterior view, with sparse setae; surstylus short, wide, parallel sided with broadly rounded apex, surstylus with sparse short setae; cercus broad, triangular, ventral projection rounded, cercus with sparse setae and one long posteroventral bristle, cerci separated by a semi- circular excavation; distiphallus weakly sclerotized. Type material: Holotype 3: “ ST. LUCIA, W.I.: Barre de / l’isle, rainforest / 28.ii. 2000, L. Masner / yellow pan trap by creek”, “ HOLOTYPE / Goniaspis / lucia / Mlynarek & Wheeler” (LEM). Paratypes: same data as holotype (1 Ƥ, LEM); Edmund Forest Reserve, 500m, 1.iii. 2000, L. Masner (263, 7Ƥ, LEM); 1.5km W Praslin, 2.iii. 2000, yellow pan trap in forest, L. Masner (1 Ƥ, LEM); 10.x. 1939, R.G. Fennah (13, USNM). Etymology: The species name is a noun in apposition derived from the name of the type locality.Published as part of Mlynarek, Julia J. & Wheeler, Terry A., 2009, Revision of the Neotropical genus Goniaspis Duda (Diptera: Chloropidae), pp. 26-40 in Zootaxa 2033 on page 30, DOI: 10.5281/zenodo.18632
Agaporomorphus colberti Miller & Wheeler 2008, sp. n.
No full textAgaporomorphus colberti sp. n. (Figs 1, 6, 7–9, 21) Type locality. Venezuela, Departamento Amazonas, Rio Negro, Rio Baria, Dpt Rio Negro, 00°55'N 066°10'W. Diagnosis. Agaporomorphus species are extremely similar in characters such as size, general shape and coloration (Fig. 1). This species can be distinguished from all other known Agaporomorphus except A. knischi by the following character combination in males: 1) antennomeres V and VI broadly expanded with VI more expanded than V and with a distinct emargination on the posteroventral surface (Fig. 4), 2) abdominal sternite V with an apicomedial triangular process (Figs 5, 6), and 3) abdominal sternite VI with a broad medial fovea (Figs 5, 6). This new species can be clearly placed within a group of species (the A. knischi species group) characterized by distinctly modified male genitalia with a short series of fine setae on each side of the ventral surface (Figs 7, 10, 13, 17). Within this group, A. colberti sp. n. is most similar to A. knischi in having the character combination indicated above, but differs from that species in the shape of the male median lobe of the aedeagus (Figs 7, 8) which is broader in ventral and lateral aspects and has a prominently broad and dorsally angulate ventral region near the base that is narrower in A. knischi (Figs 17, 18), among numerous other shape features. Also, the posteromedial spine on abdominal sternite V is smaller in A. colberti sp. n. (Fig. 5) than in A. knischi (Fig. 6). Description. Measurements. TL = 2.93–3.18mm, GW = 1.39–1.57mm, PW = 1.24–1.38mm, HW = 0.78– 0.87mm, EW = 0.49–0.58mm, TL/GW = 1.97–2.18, HW/EW = 1.50–1.64, FW/FL = 2.59–3.22. Coloration (Fig. 1). Red-brown on all dorsal surfaces, broadly light yellow along anterior margin of elytron and lateral margins of pronotum. All ventral surfaces and appendages yellow-brown except abdominal sternites red-yellow. Sculpture and structure. Pronotum with microsculpture consisting of fine cells, with few very fine punctures interspersed; lateral pronotal bead fine, absent in anterior one-fifth. Prosternum medially strongly carinate, carina extending onto prosternal process; prosternal process medially with a distinct, sharp longitudinal carina extending to apex, laterally with strongly beaded margins, apex pointed. Elytron covered with extremely fine, evenly spaced, short striae, striae more punctiform laterally and apically. Metafemur moderately broad, length about 3 × greatest width. Male genitalia; Median lobe in lateral aspect robust, with broad expansion dorsad, apex elongate, sublinear, with distinct dorsally-directed lobe on right side medially and very broad, angular region subbasally, with linear series of fine setae on each side of dorsal midline (Fig. 7); in ventral aspect very robust, broad, with complicated folding and structures (Fig. 8). Lateral lobe broad basally, strongly narrowed medially, apical half very slender, apicomedially with large membranous lobes bearing extensive series of long setae (Figs 9). Female genitalia; Spermatheca long, loosely coiled, slender, tapered to spermathecal duct; spermathecal duct relatively short; fertilization duct long, coiled; gonocoxa slender, lateral margin broadly convex, apex expanded; laterotergite very slender, elongate. Sexual dimorphism. Male protarsal claws unmodified; male pro- and mesotarsal claws about half length of mesotarsomere V; male without apical lobe on mesotarsomere V; male protarsomeres I and II broadened, protarsomere I with two large adhesive setae, protarsomere II without adhesive setae; male mesotarsomeres I and II slightly broadened, mesotarsomere I with one large, medial adhesive seta and two large, apical adhesive setae, mesotarsomere II with two smaller, apical adhesive setae; female pro- and mesotarsomeres unmodified. Male with fine but distinct triangular, posteriorly-directed prominence medially along posterior margin of visible abdominal sternite V (Fig. 5); female without prominence. Male with broad, elongate depression medially on abdominal sternite VI (Fig. 5); female without depression. Male with distinct parallel series of rugulosities on each side of midline on abdominal sternite III (Fig. 5); female without rugulosities. Male antennomeres V and VI modified, V broadly triangular, VI broad with large posterior emargination (as in Fig. 4); female antennomeres unmodified. Male metafemur unmodified. FIGURES 7–20. Agaporomorphus species, male gentitalia. 7–9) A. colberti; 10–12) A. silvaticus; 13–16) A. tambopatensis; 17–20) A. knischi. 7, 10, 13, 17) median lobe, right lateral aspect; 8, 11, 14, 18) median lobe, ventral aspect; 9, 12, 15, 19) right lateral lobe, right lateral aspect. 16, 20) left lateral lobe, right lateral aspect. Etymology. This species is named to honor comedian and author, Stephen T. Colbert. Phylogenetic relationships. The phylogenetic analysis resulted in a single parsimony tree (Fig. 21, length=13, CI=92, RI=94). This topology is identical to the one found by Miller (2005) with the addition of A. colberti sp. n. as the unambiguous sister to A. knischi (Fig. 21) based on the synapomorphy of modified antennomere V in addition to VI (e.g. Fig. 4, A. tambopatensis also has antennomere VI modified, though to a lesser extent, Fig. 3). Although not otherwise coded in this analysis because of challenges in homologizing complex shape features, A. colberti sp. n. and A. knischi exhibit considerable general similarity in the shape of the male median lobes (Figs 7, 8, 15, 18). Distribution. Agaporomorphus colberti sp. n. is currently known only from the type locality in extreme southern Venezuela near the border with Brazil. This is the only Agaporomorphus known from Venezuela. Material examined. HOLOTYPE: ♂ in MIZA labeled, " Venezuela T-F Amazonas Dpt Rio Negro / Rio Baria 140m. 0°55'N 66°10'W / L.J.Joly A.Chacon 4-11- II-8 [date handwritten]/ HOLOTYPE: Agaporomorphus colberti Miller and Wheeler, 2008 [red label with black line border]." PARATYPES, 10 total, in MIZA, USNM and MSBA labeled same as holotype except "…/ PARATYPE: Agaporomorphus coberti Miller and Wheeler, 2008 [blue label with black line border]."Published as part of Miller, Kelly B. & Wheeler, Quentin D., 2008, A new species of Agaporomorphus Zimmermann from Venezuela, and a review of the A. knischi species group (Coleoptera: Dytiscidae: Copelatinae), pp. 63-68 in Zootaxa 1859 (1) on pages 64-67, DOI: 10.11646/zootaxa.1859.1.4, http://zenodo.org/record/513311
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