74 research outputs found
High-pressure phase transformations of ramp-compressed aluminum and sodium
No full textThesis (Ph. D.)--University of Rochester. Department of Physics and Astronomy, 2018.This thesis describes discoveries of new structural phase transitions in two of nature’s
“simplest” metals, aluminum (Al) and sodium (Na). High-power lasers are used
to ramp compress Al and Na into high-pressure solid states. These metals form face-centered
cubic (fcc) and body-centered cubic (bcc) structures at ambient temperatures
and pressures, respectively. Both are predicted to undergo a sequence of structural
transformations to low-symmetry crystalline phases including insulating “electride”
phases at high pressure. To explore this high-pressure behavior, Al and Na samples
were ramp compressed over 10-20 nanoseconds by the high-power OMEGA EP laser.
Nanosecond in-situ x-ray diffraction (XRD) was performed to determine the crystalline
structure at pressures > 100 GPa and the absence of diffraction peaks was used to infer
the onset of melting. Laser velocimetry was used to determine the in situ pressure of
the Al and Na by measuring the particle or free-surface velocities in the samples. In Al,
we show that a solid–solid phase transition to a hexagonal close-packed (hcp) structure,
occurs at 216±9 GPa. At higher pressures, a transformation to a body-centered cubic
(bcc) structure occurs at 321±12 GPa and persists to 547 GPa. This is the first in situ
observation of bcc Al [1]. Additionally, the highest pressure solid x-ray diffraction and
reflectivity data to date on Na are presented. Melting and resolidification of Na to an
hP4 phase is observed for pressures greater than 300 GPa, and the melting curve is
found to increase dramatically for pressures above 140 GPa. Simultaneous XRD and
optical reflectivity measurements reveal that Na remains reflective to at least 290 GPa
– in striking contrast to room-temperature static compression measurements
La Dánae burlesca de Pedro Silvestre. Edición anotada / The burlesque Danae by Pedro Silvestre. An annotated edition
No full textOfrecemos en el presente trabajo la edición de un poema basado en el mito de Dánae que fue compuesto en el siglo XVIII por un autor que firmaba bajo el seudónimo de Pedro Silvestre. El mayor interés de esta composición radica en el hecho de ser una de las escasas muestras que encontramos en la literatura española de una fábula burlesca que desarrolla este mito clásico. Nuestro trabajo ofrece la transcripción modernizada –basada en el único manuscrito existente– de este texto hasta ahora inédito, además de una breve introducción y diversas notas lingüísticas y aclaratorias.Palabras clave: mitología, Dánae y Perseo, fábula burlesca, manuscrito, Pedro Silvestre. Abstract:We offer in this paper an edition of a poem based on the myth of Danae which was composed in the eighteenth century by an author who signed under the pseudonym Pedro Silvestre. The greatest interest of this composition lies in the fact of being one of the few examples found in the Spanish literature of a burlesque fable that develops this classic myth. Our work offers the modernized transcription –based on the only existing manuscript– of this until now unpublished text, along with a brief introduction and diverse linguistic and explanatory notes.Keywords: mythology, Danae and Perseus, burlesque fable, manuscript, Pedro Silvestre.
Sundathelphusa danae Husana, Yamamuro & Ng, 2014, sp. nov.
No full textSundathelphusa danae sp. nov. (Figs. 1 –3, 7A, B) Material examined. Holotype: male (25.9 × 19.8 mm) (NMCR 39076), Bantakay Cave, Atimonan, Quezon Province, Luzon, Philippines, 14 ˚ 01.703N 121 ˚ 47.197 E, coll. D.E.M. Husana, 13 January 2010. Paratypes: 1 male (21.7 × 17.9 mm) (ZRC 2013.0274), 1 female (20.4 × 16.8 mm) (NMCR 39093), same data as holotype. Comparative material. Sundathelphusa holthuisi Ng, 2010, holotype male (24.3 × 19.4 mm) (ZRC 1989.2169), Bantakay Cave, Atimonan, Quezon Province, Luzon, Philippines, ca. 14 ˚00N 121 ˚ 52 E Quezon Province, Luzon, Philippines, coll. D.S. Balete, 22 May 1987; 1 female (23.1 × 18.6 mm) (ZRC 1989.2168), station C-054, National Botanic Gardens, Real, Quezon Province, Luzon, Philippines, coll. D.S. Balete, 9 September 1987; 1 male (18.5 × 15.9) (NSMT-Cr 22316) (NMCR 39093), Bantakay Cave, Atimonan, Quezon Province, Luzon, Philippines, 14 ˚ 01.703N 121 ˚ 47.197 E, coll. D.E.M. Husana, 13 January 2010; 1 male (15.6 × 13.7 mm) (ZRC 2013.0275), Nilulubugan Cave, Atimonan, Quezon Province, Luzon, Philippines, 14 ˚ 01.000N, 121 ˚ 47.775 E, coll. D.E.M. Husana, December 2009. Description. Carapace quadrate to trapezoidal (Fig. 1 A), widest at anterior quarter, broader than long, dorsoventrally compressed, dorsal surface slightly convex longitudinally, covered with short setae, regions distinct; gastric regions covered with distinct oblique striae; cervical groove prominent; H-shaped gastric groove deep. Epigastric cristae distinct, edges sharp, separated by distinct median furrow; postorbital cristae sharp; epigastric, postorbital cristae confluent; epibranchial teeth, postorbital cristae not confluent, separated by gaps (Fig. 1 B). Frontal margin (Figs. 1 B, 2 C) protruded, sinuous, deflexed. External orbital tooth triangular, produced anteriorly; outer margin concave, granular, longer than inner margin; epibranchial tooth distinct, triangular, well separated from external orbital tooth by deep U-shaped notch, tapering anteriorly; anterolateral margin straight to gently convex, upswept, serrated, clearly demarcated from posterolateral margin; posterolateral margin almost straight to gently concave, with oblique striae converging gradually towards posterior margin of carapace. Frontal median triangle distinct (Figs. 1 B, 2 C), complete, with sharp, protruded dorsal margin, confluent with lateral margins; orbit well demarcated; supraorbital margin smooth; infraorbital margin lined with distinct granules; outer edge reaching, fused with anterolateral margin; suborbital, subbranchial regions covered with scattered oblique striae of nearly uniform size; pterygostomial region with oblique ridges on anterior dorsolateral part. Posterior margin of epistome (Figs. 1 B, 2 D) with 3 lobes; median lobe triangular; lateral lobes sinuous, wider. Eyes well developed (Fig. 1 B), well pigmented, occupying almost entire orbit. Third maxilliped ischium (Fig. 3 A) rectangular, much longer than broad, with distinct oblique submedian sulcus closer to mesial margin, surfaces covered with scattered short setae; merus quadrate, antero-external angle convex, upswept; tip of exopod not reaching midpoint of outer margin of merus, with short flagellum barely reaching edge of upswept mesial margin of merus. Chelipeds not noticeably elongated, subequal, stronger in males; margins of merus serrated, dorsal margin with small subdistal tooth; carpus armed with strong distal sharply pointed inner tooth, dorso-ventrally flattened; palm with smooth outer surface; fingers robust, cutting edges armed with numerous medium-sized to large sharp teeth. Ambulatory legs long (Figs. 1 A, 2 B), slender, second leg longest, anterior margins of meri distinctly serrated, without subdistal tooth or spine, posterior margins smooth on all legs; second, third meri slightly shorter than carapace length; carpi short, with longitudinal submedian ridge on dorsal surface except for fourth leg, widened distally; propodi, dactyli subequal in length. Male abdominal cavity reaching imaginary level demarcated by proximal quarter of coxae of chelipeds. Male abdomen (Figs. 2 A, 3 B) narrow, T-shaped; somite 1 short, somite 6 longer than broad; proximal, distal margins of somites 3–5 sinuous; lateral margins of somite 2 convex; lateral margins of somite 3 convex; lateral margins of somite 4 straight, narrows gradually to distal end; somites 3–5 narrow gradually; lateral margins of somite 5 concave, proximally wide distally narrow; lateral margins of somite 6 longer than broad, straight; telson subtriangular, longer than broad, lateral margin slightly concave proximally, rounded distally. G 1 slender (Figs. 2 E, F, H, I), subterminal segment gradually tapering towards terminal segment, proximal two-thirds straight, distal onethird slightly bent outward, segments separated by distinct suture; terminal segment straight, tapering, cylindrical, obliquely bent outwards from suture. G 2 (Figs. 2 G, J) longer than G 1, flagellum long, about half the length of basal segment. Female. Female chelipeds subequal, neither inflated; abdomen rounded, covering entire thoracic sternum, all somites and telson freely articulating; telson broadly triangular with convex lateral margins (Fig. 7 A). Vulvae large, round, without operculum; on median part of somite 6 (Fig. 7 B). Coloration. Dorsal surface of carapace is purple to maroon in life, cheliped is yellowish to reddish-orange. Etymology. Named after a daughter of the first author, Dana Vi Husana, who accompanied him in some of his fieldwork. Remarks. Sundathelphusa danae sp. nov. was collected from Bantakay Cave, Atimonan, Quezon Province, Luzon, the type locality of S. holthuisi Ng, 2010. Although Sundathelphusa danae sp. nov. is sympatric with S. holthuisi (and the two species were collected together, see comparative material), and both possess a relatively slender G 1 with a simple cylindrical terminal segment, they differ markedly in several other aspects. Sundathelphusa danae sp. nov. can easily be distinguished from S. holthuisi as follows: 1) the anterolateral margins are prominently more convex (Fig. 1 A) (margins gently convex in S. holthuisi, Ng 2010: fig. 2 B); 2) the branchial regions are proportionately more inflated (Fig. 1 B) (only gently swollen in S. holthuisi, Ng 2010: fig. 2 C); 3) the median triangular lobe on the posterior margin of the epistome is sharper and relatively broader (Fig. 1 B) (wider and the tip rounded in S. holthuisi, Ng 2010: fig. 3 B); 4) the frontal median triangle is complete (Figs. 1 B, 2 C) (incomplete in S. holthuisi, Ng 2010: 3 B); 5) the ambulatory legs are relatively more slender and elongated, especially with regard to the merus and propodus (Figs. 1 A, 2 B) (merus and propodus relatively shorter and stouter in S. holthuisi, Ng 2010: fig. 2 B); and 6) the G 1 terminal segment is more strongly bent (Fig. E, F, H, I) (gently curved in S. holthuisi, Ng 2010: fig. 4 J–M). Sundathelphusa danae sp. nov. can immediately be separated from S. celer Ng, 1991, and S. longipes (Balss, 1937) (both from Luzon) by its more strongly convex anterolateral margins (cf Ng 2010: figs. 1 A, 2 A), proportionately longer ambulatory legs (cf. Ng 2010: figs. 1 E, 2 A) and more slender G 1 which has the terminal segment slender and cylindrical (relatively stouter and shorter in S. celer and S. longipes, Ng 2010: figs. 1 H–K, 4 E–H). The spelling of the name of the type locality for S. holthuisi – “Bautakay Cave, Station Catalina, Atomonau ” (see also Ng 1991: 15 as Archipelothelphusa longipes) is incorrect. It should be “Bantakay, Santa Catalina, Atimonan ”.Published as part of Husana, Daniel Edison M., Yamamuro, Masumi & Ng, Peter K. L., 2014, Two new species of freshwater crabs of the genus Sundathelphusa Bott, 1969 (Decapoda: Brachyura: Gecarcinucidae) from caves in Luzon, Philippines, pp. 565-574 in Zootaxa 3815 (4) on pages 566-569, DOI: 10.11646/zootaxa.3815.4.6, http://zenodo.org/record/23082
Leading Across Generations
No full textWhile stereotypes abound, it's no secret that there are real differences between each of the three generations that make up the majority of today's workforce. Now the largest sector of the workforce, Millennials are generally tech-savvy, enjoy workplace flexibility, and need regular coaching and feedback from superiors to be effective. Like Millennials, Gen Xers want a work-life balance (since many are dealing with aging parents) but many are skeptical of new ideas since they were hardest hit by the recession and lost a great deal of their wealth. While Millennials and Gen Xers value a work-life balance, Baby Boomers tend to value hard work, teamwork and experience, but are generally not tech-savvy. With so many differences among generations, it's easy to see why workplace conflicts often arise. Each generation has preferred methods of communication and each places value on different aspects of life and work. Many of these differences are a direct result of major social and economic events that occurred during upbringing. For example, Gen Xers were the first generation of kids who grew up with two working parents so they tend to value independence in the workplace. Many Millennials, however, grew up with "helicopter parents" so they appreciate constant feedback and coaching in the workplace (which may be a source of conflict for leaders who value independence among their workers). This session will identify the major characteristics (and stereotypes) among generations in the workforce and help create some common ground for Extension professionals to lead effectively across generations. Session will include several hands-on activities and offer participants the opportunity to discuss and overcome workplace conflicts that result from generational differences, both real and perceived.AUTHOR AFFILIATION: Danae Wolfe, OSU Extension educational technology specialist, [email protected] (Corresponding Author)Millennials are officially the largest generation in the workforce. This generation of highly educated 20- to 30-year-olds tends to have an unconventional leadership and work style, which can be a source of either inspiration or conflict. Learn about the cultural and attitudinal differences between generations and insights into how higher education professionals can leverage the best of each generation to create an effective workplace. This will help break down generational stereotypes for all generations and build common ground for workplace success
Design Thinking: An Innovative Approach to Program Design
No full textCollaboration is vital in effectively driving innovative solutions to complex community issues. Creativity and the art of experimentation have been lost in our current culture of efficiency. Design thinking, born from research by Tim Brown (IDEO) and the Stanford D School, provides an actionable step-by-step process for creative design that can help Ohio State faculty and staff develop creative solutions to current complex challenges and opportunities while fostering robust community partnerships. This innovative approach includes five stages of design – empathize, define, ideate, prototype, and test – and is ideal for land-grant universities because it offers a human-centered approach to issues identification and program planning. Design thinking is of particular importance to land-grant institutions because it fosters successful community needs assessments through direct observation and interviews with key stakeholders. The insights gained through observation and interviews help drive creative and effective solutions to society's greatest issues while forcing program designers to leave their assumptions at the door. While traditional models of program planning, like the logic model, are still very much relevant to how we plan and identify resources and objectives, design thinking offers a more robust and agile method to plan engagement opportunities by moving evaluation up in the planning process and guaranteeing a higher level of impact. Design thinking leans heavily on empathy and incorporates ways to actively engage stakeholders and partners in the program design process. Even more, design thinking encourages validating assumptions, identifying gaps in knowledge, failing early, and pivoting where necessary to ensure every idea will be met with success. This workshop-style session will provide participants with an introduction to design thinking, examples of how it is currently being implemented in higher education, and many hands-on design thinking activities for an immersive experience. Participants will leave the workshop with a better understanding of the non-linear process necessary for designing solutions to complex challenges and opportunities. Participants will be armed with daily habits and activities they can utilize right away in their work and with colleagues and community members. Additional information will be provided for further design thinking collaborative learning opportunities for continued learning and development.AUTHOR AFFILIATION: Danae Wolfe, OSU Extension educational technology specialist, [email protected] (Corresponding Author)Design thinking is an innovative approach to program or product design that includes five stages: empathize, define, ideate, prototype, and test. This workshop-style session will provide participants with an introduction to design thinking, examples of how it is currently being implemented in higher education, and many hands-on design-thinking activities for an immersive experience. Participants will leave with a better understanding of the non-linear process necessary for designing solutions to complex challenges and opportunities. They will be armed with activities to utilize right away in their work with colleagues, partners, and community members. Additional information will be provided for continued learning and development opportunities in design thinking
Daniel Hannan, Thomas Paine, and the Rhetoric of Outrage
No full textThe purpose of this rhetorical study is to examine the textual charisma of Thomas Paine\u27s Common Sense and Daniel Hannan\u27s speech The Devalued Prime Minister of a Devalued Government and how that charisma made these artifacts successful in spreading outrage surrounding the historical and political events of their respective eras. The author uses Weber\u27s theory of charisma filtered through Rosenberg and Hirschberg\u27s expanded theory identifying lexical charisma, or the charisma of messages. The author analyzes Paine\u27s and Hannan\u27s use of persuasiveness, believability, and powerfulness, translating each of these characteristics into specific cues that can be identified in the individual texts. The author argues for a new subdivision of protest rhetoric called outrage rhetoric
Uncertain Fragments
No full textThe article revisits notes, thoughts and texts related to the notion of the “open work”, as these were gathered from its author during the project Syros – a bet on the potentiality of cooperation (Syros, July ’13). It presents a historical review of the way the term has been discussed and practiced in performance contexts, and aims towards a questioning of its use and an attempt to detect effective understandings of it today, arriving at the notion of “differentiation” as discussed by B. Cvejić and A. Vujanović (2005). At the same time, the text constitutes a writing experiment that applies the rules of Hebrew writing (right to left, bottom to top) to the English language, in order to delve even deeper into possible suggestions of the “open” through a practice-led research approach
Utilizing discovery tools for classrooms: how do librarian attitudes on discovery impact tools they teach?
No full textPurpose – The purpose of this paper is to examine the utilization of discovery tools in classrooms with the aim of trying to assess the attitude toward them.
Design/methodology/approach – The methodology adopted in this article is a literature review.
Findings – Despite the author\u27s best efforts to look at the data from all angles, the author found no statistical significance in any of the data pulled from the survey. The author also tested to see if personal preference had any bearing on reference preference and found that there was no statistical significance between personal preference and reference preference. The author removed all responses that said “it depends” and the results showed that there still was no statistical significance between personal preference and reference preference.
Originality/value – Libraries can rebrand their services by utilizing and advocating for discovery tools, but it will only happen if they are willing to make changes on their attitudes toward discovery tools
Historic Columbia River Highway : Shellrock Mountain to Ruthton Point
No full textTitle from PDF cover (viewed on October 31, 2018).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Le Danae di Petrarca (e non solo)
No full textStarting from the analysis of both the Allegory of Lorenzo Lotto (Washington, National Gallery of Art) and its connections with Petrarch’s Canzoniere, this essay aims to study some Petrarchan interpretations of the mythological episode of Danaë. Following the double thematic thread of the excited gaze and the sublimation of desire, this analysis matches literary and visual sources, focusing on the illustrative set of the “Incunabolo Queriniano” produced by Antonio Grifo as well as on the moralised elaboration of the figure of Danaë in some Latin texts by Petrarch, and finally on some poetic ekphraseis by the Venetian Renaissance author Lodovico Dolce
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