757 research outputs found
Eriope orlandoi Harley 2023, sp. nov.
No full text<p> <b>Eriope orlandoi</b> <i>Harley</i>, <i>sp. nov</i>. (Figures 1 & 2).</p> <p> Type:— BRAZIL. Bahia: Rio de Contas, ao norte da cidade, na beira da estrada antigamente chamada a Estrada de Ouro, nos arredores da Serra Molhada, 13º 32’ 03” S, 41º 48’ 41” W. alt. 1127 m, campo rupestre, 17 Aug. 2021, (fl.), <i>R.M. Harley & O. Santos</i> 58773 (holotype HUEFS [barcode: 263595]); isotypes RB, SPF).</p> <p> <b>Diagnosis:—</b> <i>Eriope orlandoi</i> is morphologically similar to <i>E. crassifolia</i> Benth., with which it shares the small, ± imbricate, coriaceous and rigid leaves. However, <i>E. orlandoi</i> is much more robust, up to 1 m or more tall, usually with a stout, very woody main stem and a much-branched crown of leaves, while <i>E. crassifolia</i> is a shorter, less branched plant, to c. 60 cm. The leaves of <i>E. orlandoi</i> are with a lamina 0.7–1.3 × 0.7–1.4 cm, rotund and with apex rounded or minutely apiculate, in <i>E. crassifolia</i> the lamina is 0.7–1.0 (1.2) × 0.3–0.4 cm, lanceolate to narrowly ovate, with apex acute. Flowers with fruiting calyx in <i>E. orlandoi</i> to 9 mm long, in <i>E. crassifolia</i> 6–7 mm long. Both species are endemic to the Chapada Diamantina, but while <i>E. orlandoi</i> occur in the Serra das Almas area, <i>E. crassifolia</i> occurs c. 60–80 km to the east of <i>E. orlandoi</i>, in the Serra do Sincorá. Another species, which occurs at high altitudes in Rio de Contas and is sometimes confused with the latter, is <i>E</i>. <i>anamariae</i> Harley. This species can easily be distinguished from <i>E. orlandoi,</i> as the leaves have much longer petioles, at least 3 mm long or usually much more, (usually sessile or up to 2 mm in <i>E</i>. <i>orlandoi</i>).</p> <p> <b>Description:—</b> Shrub to 1 m tall, much branched with very woody, spreading branches, main stems erect, leafless below, with an often rather dense crown of leaves above. Stems usually 1.6–2.0 cm in diameter near the base or rarely in older specimens up to 3.0 cm. with bark brownish grey and longitudinally striate. Younger stems very leafy, with slender semi-setose hairs, especially below and near the nodes, with numerous short, patent hairs. Leaves strongly coriaceous and rigid, spreading to ascending and then weakly imbricate, longer than internodes, petiole 1–2 mm long, with lamina 0.7–1.3 × 0.7–1.4 cm, ± rotund, base weakly cordate, apex rounded or minutely apiculate, margin yellowish, slightly translucent, with teeth very small, acute and thickened, adaxial surface often slightly concave dark green, weakly rugose, with nerves ± impressed, often slightly scabrid with scattered, short, erect hairs, abaxial paler green, nerves reticulate, weakly prominulous, thickened, incrassate, sparsely pilose and with many small, stalked glands. Inflorescence a branched pseudo-raceme of 1-flowered cymes with bracts caducous, branches usually rather short. Axis of the inflorescence with slender spreading, white hairs c. 0.6 mm long, longer and denser at the nodes. Flowers ± remote, with bracts dark usually caducous, pedicels up to c. 3 mm long, slender, spreading or often slightly reflexed; calyx at anthesis c. 3 mm long, greenish-yellow or often slightly blackish, tube c. 1.5–2 mm long, turbinate, with dense, sessile and short-stalked often yellow glands and very short, patent hairs, with or without a pair of slender, linear bracteoles at its base, lobes unequal, c. 2 mm long, widely spreading, broadly deltoid to almost cordate, apiculate, fruiting calyx with pedicel slightly deflexed and with dense white indumentum in throat; corolla dark bluish violet, up to c. 1 cm long, 2-lipped, corolla-tube with basal portion c. 2 mm long, narrowly cylindrical, white, glabrous, abruptly widening above and becoming hairy and pale violet-blue, posterior lip 2-lobed, externally hairy, internally with throat paler, with a white area, usually two-lobed from base, elsewhere deep violaceous with darker longitudinal lines; stamens with filaments white, densely covered with white hairs, anthers yellow, with yellow pollen, style purplish, glabrous. Gynoecium with stylopodium at base of style. Nutlets c. 2.5 × 1.8 mm, broadly ellipsoid and flattened with rotund apex, very dark brown, with very slightly rugose surface, on internal surface at base, with two elongate white, dehiscence scars. Nutlets mucilaginous when wet. (Fruiting material taken from <i>Harley 58824</i>).</p> <p> <b>Distribution and Habitat</b>:—The types of <i>Eriope orlandoi</i> were collected in Southwestern Bahia, in open, flat areas of campo rupestre in sandy soil, often with quartzite grit and near rock outcrops between 1100 and 1430 m altitude. However, the very first collection of this species was made by the author in 1996, under the collection number of Hortênsia Bautista. At that time the collection was considered a possible new species related to <i>Eriope crassifolia</i>, although no further action was taken. So far, we have found only two other populations, although with a substantial number of individuals, especially in that close to the Estrada de Ouro.</p> <p> <b>Phenology</b>:—Flowering was noted especially between March to September, but in some years due to extensive drought, flowering and fruiting did not occur, or was delayed. Fruiting in 2021 occurred extensively in October, and good fruiting material, from almost the same locality as the holotype can be seen in <i>Harley et al. 58824</i>.</p> <p> <b>Conservation Status</b>:—Only a few populations have so far been found, occurring not more than about 12 km apart. As the area of campo rupestre is extensive, much of it has yet to be explored. The main threats to the plants are the increase in cultivation in some areas, especially near Betancourt, although the plants seem to prefer very sandy and stony areas which are mainly unsuitable for cultivation. The population found below the Serra Molhada seems to be restricted to the roadside. However, further exploration of the serra may reveal further populations, as there are still areas that need to be visited, as often happens for plant species with little known, or small size or difficult to identify (e.g. Perrino <i>et al.</i> 2022, Wagensommer <i>et al.</i> 2017). I therefore consider the species as Data Deficient.</p> <p> <b>Etymology:—</b> The epithet honours our local guide, Orlando Santos, whose perspicacity at finding interesting plant species, resulted in the collection of this new species. Originally, he brought me a branch with old fruits, which I immediately recognized as a new species. We subsequently visited the plant on numerous occasions, returning to the populations to make observations over two years at different times of the year.</p> <p> <b>Additional material examined (paratypes):—</b> BRAZIL. Bahia: Rio de Contas; Fazendola, 23° 26’ 57” S, 41° 52 10” W, alt. 1110 m, 16 Nov. 1996, <i>H.P Bautista, Harley, Hind & Roque PCD 4374</i> (CEPEC, HUEFS, K, SPF); Distrito de Mato Grosso, próximo a comunidade Betancourt, 13˚25’56.5” S, 41˚50’52.2” W, alt. 1415 m, 09 Jan. 2018, <i>Harley & Santos 58219</i> (HUEFS); Distrito de Mato Grosso, na trilha para o Pico do Itobira, 13˚22’55”S, 41˚53’34”W, alt. 1412 m, 16 Oct. 2018, <i>Harley et al. 58236</i> (HUEFS); 13˚ 22’55”S, 41˚53’34”W, alt. 1412 m, 16 Oct. 2018, <i>Harley et al. 58238</i> (HUEFS); Proximidades de Betancourt, trilha para o Pico de Itobira, 13º25’52.1” S, 41º50’51.2” W, alt. 1402 m, 27 May 2019, <i>Harley & Giulietti 58395</i> (HUEFS); Bitencourt, na trilha para o Pico de Itobira, 13°25’57.5”S, 41°50’53”W, alt. 1404 m, 22 Nov. 2019, <i>Harley et al. 58460</i> (HUEFS); Estrada de Ouro, Mar. 2020, <i>Santos in Harley 58644</i> (HUEFS); Estrada de Ouro, na base da Serra do Molhado, 13°32’03”S, 41°48’41”W, alt. 1127 m, 21 Oct. 2020, <i>Santos in Harley 58666</i> (HUEFS); ao norte de Rio de Contas, na beira da estrada antigamente chamada de Estrada de Ouro, nos arredores da Serra Molhada, 18 Mar. 2021, <i>Harley</i> & <i>Santos 58689</i> (HUEFS); same locality, in campo rupestre, <i>Harley et al. 58700</i>, 19 May 2021 (HUEFS); Nearby locality, in gerais, 13º 32’ 48” S, 41º 48’ 30” W, alt. 1138 m, 29 Oct. 2021, <i>Harley & Santos 58824</i> (HUEFS).</p>Published as part of <i>Harley, Raymond Mervyn, 2023, A new species Eriope orlandoi (Lamiaceae) from the Chapada Diamantina of Bahia, Brazil, pp. 71-76 in Phytotaxa 591 (1)</i> on pages 72-75, DOI: 10.11646/phytotaxa.591.1.7, <a href="http://zenodo.org/record/7784286">http://zenodo.org/record/7784286</a>
Anisotropy of the electron g factor in lattice-matched and strained-layer III-V quantum wells
No full textThe influence of quantum confinement and built-in strain on conduction-electron g factors in lattice-matched GaAs/Al0.35Ga0.65As and strained-layer In0.11Ga0.89As/GaAs quantum wells is investigated for well widths between 3 and 20 nm. The magnitude, sign, and anisotropy of the g factors were obtained from quantum beats due to Larmor precession of electron spins in time-resolved, polarization-sensitive, pump-probe reflection at 10 K in magnetic fields applied along and at 45° to the growth axis. Slowly varying shifts of precession frequency, due to buildup of nuclear polarization in the samples over ?1 h and equivalent to up to 0.5 T, occurred for fixed circular pump polarization and oblique applied fields. These Overhauser shifts confirmed the sign of the g factors and were eliminated by modulation of pump polarization to give precise g factors. For both material systems, variation of the g factor with well width follows qualitatively the dependence on energy, determined by quantum confinement, calculated from three-band k?p theory in the bulk well material. For the lattice-matched system there is excellent quantitative agreement with a full three-band k?p calculation including anisotropy effects of the quantum-well potential. For the strained-layer system, detailed quantum-well calculations do not exist but k?p theory for epitaxial layers predicts 10 times greater anisotropy for wide wells than we observe. This discrepancy is also apparent in previous, less complete, investigations of strained-layer systems and highlights the need for further theoretical effort
Spin dynamics in semiconductor heterostructures
No full textThis thesis presents experimental investigations of the electron spin dynamics (i.e. the spin relaxation rate, This thesis presents experimental investigations of the electron spin dynamics(i.e. the spin relaxation rate, Γs, and the g-factor, g * ) inGaAs/ AlGaAs based semiconductor heterostructures and the effect of symmetry breaking perturbations such as; an applied external electric field, shear strain or graded alloy composition in the barriers. Spin-polarised electron populations are generated and detected using optical methods. Quantum wells grown on a (001) zinc-blende substrate display isotropic inplane spin dynamics. The above perturbations act to lower the symmetry and therefore the spin dynamics are allowed to show in plane anisotropy. However, the microscopic origin of the anisotropy of Γs is different to that of g* . This thesis contains a full study of the anisotropy of both Γs and g* for all of the above perturbations. This reveals the microscopic effects on the band edges of the perturbations.It has previously been shown theoretically that strain applied in the plane of (110) or (111) oriented quantum wells can act to cancel the spin-orbit field from bulk inversion asymmetry. In this thesis, we study the effect on the spin dynamics of strain applied to a (110) quantum well and also investigate a (111) sample for its suitability in such experiments
Developing Human Service Leaders
No full text...empowering text for human services students that covers the skills and behaviors essential for leaders to manage themselves, their teams, and the organization. Using a unique coaching voice, author Deborah Harley-McClaskey follows a Reflection–Diagnosis–Prescription approach for leadership development with exercises built into the dialogue. The final chapter, Prognosis, offers a workbook-style exercise to help students make a personal change. --Amazonhttps://dc.etsu.edu/etsu_books/1115/thumbnail.jp
A Scottish Whig View of the Character of Robert Harley,Earl of Oxford, in 1713
No full textThe character and personality of past politicians are difficult to discover. In the absence of a dairy or intimate letters the best source is often a description by a third party, but in early modern British history these can be rare. Such evidence, however, is often difficult to use because of the (often unknown) bias of the author. Robert Harley, earl of Oxford, who was lord treasurer from 1711 to 1714, is a particularly difficult man to analyse and had the reputation with his contemporaries of being a ‘trickster’. The historian is fortunate that several descriptions of his personality have survived and a recently discovered letter in the correspondence of the Rev. Robert Wodrow, probably written by Thomas Smith, MP for Glasgow 1710-16, gives the historian a fresh, Scottish and whig opposition view of Harley, which reinforces the general view of him as a tricky, untrustworthy man
Sidonia Bottomland and On a Harley bound for New Orleans : two poetry chapbooks
No full textSidonia Bottomland and on a harley bound for new orleans: Two Poetry Chapbooks presents the author\u27s original poems, both published and unpublished, written primarily from the summer of 1991 to the spring of 1993. The first chapbook contains poems about a sparsely populated area in Northwest Tennessee. The second chapbook contains poems about dreams. Most of the poems are free verse, and many are autobiographical
Transforms in motion compensation prediction residuals for video applications
No full textThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student submitted PDF version of thesis.Includes bibliographical references (p. 49).In video coding, motion compensation prediction provides significant increases in overall compression efficiency. The prediction residuals are typically treated as images and compressed by applying two-dimensional transforms such as the two-dimensional discrete cosine transform (2D-DCT). Previous work has found that the use of direction-adaptive one-dimensional discrete cosine transforms (1D-DCTs) in coding motion compensation residuals can provide significant additional bitrate savings. However, this requires optimization over all of the available transforms to minimize the overall bitrate, which can be expensive in terms of time and computation. In this thesis, we examine the use of only the horizontal and vertical 1D-DCTs in addition to the 2D-DCT for coding motion compensation residuals. By reducing the number of available transforms, the amount of required computation decreases significantly, with a potential cost in performance. We perform experiments using a modified H.264/AVC codec to compare the performance of using different sets of available transforms. The results indicate that for typical applications of video coding, most of the performance benefit from using directional 1D-DCTs can be retained by keeping only the horizontal and vertical 1D-DCTs.by Harley Zhang.M.Eng
Slide Rules Design, Build, and Archive Presentations in the Engineering and Technical Fields
No full textTRACI NATHANS-KELLY, PhD, teaches engineering communication at Cornell University and the University of Wisconsin-Madison. CHRISTINE G. NICOMETO, MS, teaches technical communication in the University of Wisconsin-Madison's College of Engineering. Both authors work with practicing engineers from such organizations as 3M, Federal Express, GE Healthcare Systems, General Motors, Google, Harley-Davidson, IBM, John Deere, Kraft, Lockheed Martin, Micron Technology, NASA, Qualcomm, Rockwell Automation, The Boeing Company, Toyota, U.S. Department of Defense, and UTC Aerospac
Le egloghe di Niccolò da Correggio nel ms. Harley 3406: rapporti e contesti
No full textIl contributo analizza le egloghe incluse nel ms. Harley 3406 della British Library, principale testimone del corpus poetico di Niccolò da Correggio (autore noto per la significativa componente “bucolica” dei suoi testi lirici, ma di cui non si è finora studiata la poetica eglogistica vera e propria). L’analisi dei tratti formali e di alcuni contatti intertestuali di questi testi porterà a ipotesi sui modelli seguiti e sugli autori che a loro volta avrebbero guardato a Niccolò come modello – una situazione che caratterizza soprattutto il soggiorno milanese del poeta (1490-1497), che fu al centro di una rete di contatti letterari sulla quale si proverà a far emergere nuovi dettagli.The contribution examines the eclogues included in ms. Harley 3406 (Bri-
tish Library), the main testimony of the poetical corpus of Niccolò da Cor-
reggio (an author more known for the “bucolic” touch of his lyric poetry
than as an author of fully-fledged eclogues). The analysis of the formal
traits of these poems, as well as of some intertextual knots, will allow
hypotheses on Correggio’s models and on his own role as model for other
authors. The latter situation seemingly applied, in particular, in the period
Correggio spent in Milan (1490-1497), where he became the centre of a
network of poets that will here be partly reassesse
The Harley effect: Internal and external factors that facilitate positive experiences with product sounds
No full textEveryday activities are laden with emotional experiences involving sound. Our interactions with products (shavers, hairdryers, electric drills) often cause sounds that are typically unpleasant to the ear. Yet, we may get excited with the sound of an accelerating Harley Davidson because the rumbling sound represents adventure or an espresso machine pouring cappuccino because the sound signals an upcoming relaxing event. These examples demonstrate that it is often difficult to predict how pleasant or unpleasant a product sound is and that the circumstances surrounding sound events (i.e., external factors) can influence our judgment regarding those sounds. This paper discusses these external factors and provides a technical support for this notion. It will further present implications that could influence future product designers. Furthermore, the aim of this paper is to re-position the role of sound in human-product interactions.Industrial DesignIndustrial Design Engineerin
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