266 research outputs found
A Parallel Noise-Robust Algorithm to Recover Depth Information from Radial Flow Fields
No full textA parallel algorithm operating on the units (“neurons”) of an artificial retina is proposed to recover depth information in a visual scene from radial flow fields induced by ego motion along a given axis. The system consists of up to 600 radii with fewer than 65 radially arranged neurons on each radius. Neurons are connected only to their nearest neighbors, and they are excited as soon as a sufficiently strong gray-level change occurs. The time difference of two subsequently activated neurons is then used by the last-excited neuron to compute the depth information. All algorithmic calculations remain strictly local, and information is exchanged only between adjacent active neurons (except for the final read-out). This, in principle, permits parallel implementation. Furthermore, it is demonstrated that the calculation of the object coordinates requires only a single multiplication with a constant, which is dependent on only the retinal position of the active neuron. The initial restriction to local operations makes the algorithm very noise sensitive. In order to solve this problem, a prediction mechanism is introduced. After an object coordinate has been determined, the active neuron computes the time when the next neuronal excitation should take place. This estimated time is transferred to the respective next neuron, which will wait for this excitation only within a certain time window. If the excitation fails to arrive within this window, the previously computed object coordinate is regarded as noisy and discarded. We will show that this predictive mechanism relies also on only a (second) single multiplication with another neuron-dependent constant. Thus, computational complexity remains low, and noisy depth coordinates are efficiently eliminated. Thus, the algorithm is very fast and operates in real time on 128×128 images even in a serial implementation on a relatively slow computer. The algorithm is tested on scenes of growing complexity, and a detailed error analysis is provided showing that the depth error remains very low in most cases. A comparison to standard flow-field analysis shows that our algorithm outperforms the older method by far. The analysis of the algorithm also shows that it is generally applicable despite its restrictions, because it is fast and accurate enough such that a complete depth percept can be composed from radial flow field segments. Finally, we suggest how to generalize the algorithm, waiving the restriction of radial flow
Reseña de "From Ethnomathematics to art-design matrices and cyclic matrices" de Paulus Gerdes
No full textIn this review, we present the ethnomathematics investigations undertaken in the last three decades by Paulus Gerdes, a Mozambique mathematics educator. The author presents a variety of discussions with several examples that explains the relationship of mathematics to human activities. We present, among other things, the cyclic matrices and its interrelationships with the African cultural contexts, undoing the erroneous impression that mathematics can be seen disconnected from the feature, which makes the individuals in their socio-cultural environments. Gerdes shows us that there's mathematics in different cultures and this helps us to realize the beauty of the symmetries and patterns, in addition to allowing depth between mathematics and human actions in the art
Book review: “From Ethnomathematics to art-design matrices and cyclic matrices” – Paulus Gerdes – Ed. UNESP, 2010
No full textIn this review, we present the ethnomathematics investigations undertaken in the last three decades by Paulus Gerdes, a Mozambique mathematics educator. The author presents a variety of discussions with several examples that explains the relationship of mathematics to human activities. We present, among other things, the cyclic matrices and its interrelationships with the African cultural contexts, undoing the erroneous impression that mathematics can be seen disconnected from the feature, which makes the individuals in their socio-cultural environments. Gerdes shows us that there's mathematics in different cultures and this helps us to realize the beauty of the symmetries and patterns, in addition to allowing depth between mathematics and human actions in the art
Transnationalisation and Institutional Transformations. Collected Working Papers from the TRANS-NET Project
No full textFaist T, Pitkänen P, Gerdes J, Reisenauer E, eds. Transnationalisation and Institutional Transformations. Collected Working Papers from the TRANS-NET Project. COMCAD Arbeitspapiere - working papers. Vol 87. Bielefeld: COMCAD - Center on Migration, Citizenship and Development; 2010
Pachycara angeloi Thiel, Knebelsberger, Kihara & Gerdes 2021, sp. nov.
No full text<i>Pachycara angeloi</i> Thiel, Knebelsberger, Kihara & Gerdes, sp. nov. <p>Angelo´s eelpout</p> <p>(Figures 3–6; Table 1)</p> <p> <b>Holotype.</b> ZMH 26363, male, 208 mm SL, RV ‘ Pourquoi Pas?’, INDEX2016 /1 cruise, station I16_12RO, voucher specimen code I16_158, Kairei Vent Field, Central Indian Ridge, 25°19´S, 70°02´E, ROV´VICTOR´, 2419 m depth, 15 January 2016.</p> <p> <b>Paratypes.</b> Four specimens; ZMH 26364, male, 191 mm SL, RV´Pelagia´, INDEX 2018 cruise, station I18_ 73RO, voucher specimen code I18_1240, New Vent Field 1, Southeast Indian Ridge, 27°15´S, 72°43´E, ROV`ROPOS´, 2906 m depth, 28 November 2018. ZMH 26365, male, 112 mm SL, RV´Pelagia´, INDEX 2018 cruise, station I18_95RO, voucher specimen code I18_1301, New Vent Field 2, Central Indian Ridge, 25°28´S, 69°56´E, ROV`ROPOS´, 2633 m depth, 09 December 2018. SMF 38801, male, 244 mm SL, RV´Pelagia´, INDEX 2019 cruise, station I19_27RO, voucher specimen code I19_1547, Edmond Vent Field, Central Indian Ridge, 23°52´S, 69°36´E, ROV´ROPOS´, 3275 m depth, 10 November 2019. SMF 38802, male, 143 mm SL, RV´Pelagia´, INDEX 2019 cruise, station I19_83RO, voucher specimen code I19_1726, New Vent Field 3, Southeast Indian Ridge, 25°50`S, 70°08´E, ROV´ROPOS´, 2919 m depth, 29 November 2019.</p> <p> <b>Diagnosis.</b> A species of <i>Pachycara</i> according to the definition of Anderson (1994), distinguished from its congeners by the following combination of characters: scales absent; pelvic fins absent; lateral line configuration mediolateral; dorsal fin origin associated with vertebrae 7–9 with no free predorsal pterygiophores; vertebrae 27–28 + 57–59 = 85–87; dorsal-fin rays 78–80; anal-fin rays 58–62; pectoral-fin rays 13–15.</p> <p> <b>Description.</b> Counts and measurements are provided in Table 1. Body elongated; trunk robust, tail laterally compressed along its entire length (Fig. 3). Scales absent, skin and flesh firm, in one of the smallest individuals covered with a thick layer of mucus (Fig. 4).</p> <p>......continued on the next page</p> <p>*On epurals + on upper hypural plate + on lower hypural plate.</p> <p>Head ovoid, more rounded when fresh (Fig. 4) than after preservation (Fig. 3). Snout relatively long. Eye small, circular, not entering dorsal profile of head. Gill slit oblique, extending ventrally below the level of lower pectoral base. Opercular lobe at dorsal margin of gill slit developed. Mouth subterminal and oblique; upper lip continuous across snout; lower lip without lateral lobe. Upper jaw protruding, extending posteriorly to middle of eye. Nostril tube relatively short, not reaching upper lip. Gill rakers 2+10, short and blunt.</p> <p>Pectoral fin origin below body midline. Posterior margin of pectoral fin rounded. Ray tips of pectoral fin not exserted. Pelvic fin absent.</p> <p>Teeth in vomer, jaws, and palatine relatively large, conical, sharp and many with tips bent backwards. Vomerine teeth in irregular patch; premaxillary teeth in 2 irregular rows anteriorly, dentary teeth in 2–3 irregular rows anteriorly, blending into single, short posterior row in both jaws; palatine teeth in 2 irregular rows anteriorly, blending into single, posterior row.</p> <p>Head pores moderately large (Fig. 5). Nasal pores 2, first nasal pore set just in front of nostril tube, the other set dorsoposteriorly. Suborbital pores 6–7, arising from ventral ramus of bone chain under eye. Preoperculomandibular pores 8, 4 arising from dentary, 1 from anguloarticular and 3 from preopercle. Postorbital pores 2, located at positions 1 and 4. Interorbital and occipital pores absent.</p> <p>Body lateral line with well-developed mediolateral branch starting from above upper end of gill slit and extending laterally to end of tail (Fig. 3). In addition, a very short predorsal row of neuromasts in front of dorsal fin origin and a few neuromasts in a weak dorsolateral row (Fig. 5).</p> <p>Parasphenoid wing not reaching mid-height of trigeminofacialis foramen, and relatively broadly articulated with pterosphenoid (Fig. 6). Frontal and parasphenoid not separated by pterosphenoid. Palatopterygoid series well developed. Branchiostegal rays 6.</p> <p>Dorsal fin origin above middle of pectoral fin (Fig. 5); lower tip of pterygiophore of first dorsal-fin ray associated with vertebra 7–9 (Fig. 6). Last precaudal vertebra associated with dorsal-fin ray 19–21. Free pterygiophores not present (Fig. 6). Caudal fin with 2 epural, 4–5 upper and 4–5 lower hypural rays.</p> <p>Pyloric caeca and pseudobranch filaments not developed.</p> <p> <i>Fresh color</i> (Fig. 4). Head and body beige-brown. Branchial and oral cavity light; peritoneum black. Smaller specimens, lighter and more transparent.</p> <p> <i>Preserved color</i> (Fig. 3). Head and body brownish. Branchial and oral cavity light; peritoneum black.</p> <p> <b>Etymology.</b> The species is named after the first name of Ângelo Miguel de Oliveira Mendonca, the husband of the third author.</p> <p> <b>Distribution.</b> <i>Pachycara angeloi</i> <b>sp. nov.</b> is known from the following five locations in the Indian Ocean: Edmond, Kairei and a new vent field, Central Indian Ridge; two new vent fields, Southeast Indian Ridge. Ecological information and abiotic data for assemblages where this species was collected can be found in Gerdes <i>et al.</i> (2019a, b).</p> <p> <b>DNA barcode.</b> Full COI barcodes (652 bp) were obtained for the holotype ZMH 26363 and the four paratypes ZMH 26364, 26365 and SMF 38801, 38802 of <i>Pachycara angeloi</i> <b>sp. nov.</b>, and uploaded to GenBank (https://www. ncbi.nlm.nih.gov/genbank/) with the following accessions: ZMH 26363: MW 888718, ZMH 26364: MW 888716, ZMH 26365: MW 888717, SMF 38801: MW 888715, SMF 38802: MW 888714. Pairwise genetic distances between specimens range from 0.0–0.3% sequence divergence (0–2 bp). Thus, intra-specific variation was low and does not reflect different vent sites.</p> <p>Additional relevant voucher information, photos, DNA barcodes, used primer pairs and trace files were uploaded to the Barcode of Life Data Systems (BOLD; www.boldsystems.org) (Ratnasingham & Hebert 2007), project “Indian Ocean Hydrothermal Vent Fauna—INDEX”—subproject “Indian Ocean Hydrothermal Vent Megafauna” in the public dataset “INDEX_Megafauna_2021_1”.</p> <p> <b>Remarks.</b> The new species is included in the genus <i>Pachycara</i> based on the characters defined by Anderson (1994).</p> <p> <i>Pachycara angeloi</i> <b>sp. nov.</b> is different from all other described <i>Pachycara</i> species in having 85–87 total vertebrae (vs. 92–125 in all other species). Thus, the new species expands the lower limit of total number of vertebrae of the genus <i>Pachycara</i> (92 according to Corbella & Møller 2014) down to 85.</p> <p> Further detailed comparisons with the five <i>Pachycara</i> species known from the Indian Ocean and the four <i>Pachycara</i> species associated with hydrothermal vents were performed based on the morphological characters provided by Anderson (1989), Anderson & Bluhm (1997), Anderson <i>et al.</i> (2016), Biscoito & Almeida (2004), Geistdoerfer (1994), Møller (2003), Møller & King (2007) and Shinohara (2012). Different characters between the new species and each of all nine congeners are indicated in bold in Table 2. Below are counts for the respective characters for the species are given in brackets.</p> <p>In comparison with all nine congeners, the new species has lower numbers of total vertebrae (85–87 vs. 93– 123), caudal vertebrae (57–59 vs. 67–91), dorsal-fin rays (78–80 vs. 86–115) and anal-fin rays (58–62 vs. 70–95).</p> <p> The following five species out of all nine congeners have higher numbers of precaudal vertebrae than <i>P. angeloi</i> <b>sp. nov.</b> (27–28): <i>P. caribbaeum</i> (31–33), <i>P. cousini</i> (29), <i>P. saldanhai</i> (31–34), <i>P. shcherbachevi</i> (29–32) and <i>P. thermophilum</i> (31), whereas the following three congeners have lower numbers of precaudal vertebrae: <i>P. andersoni</i> (24–26), <i>P. priedei</i> (22–23) and <i>P. rimae</i> (26). <i>P. arabica</i> (27) has overlapping precaudal vertebrae counts with the new species.</p> <p> Moreover, <i>P. saldanhai</i>, <i>P. shcherbachevi</i> and <i>P. thermophilum</i> differ from the new species in having a pelvic fin (vs. absent in the new species), higher numbers of pectoral-fin rays (18–19 in <i>P. saldanhai</i>, 16–17 in <i>P. shcherbachevi</i>, 17–18 in <i>P. thermophilum</i> vs. 13–15 in the new species) and higher numbers of gill rakers (15–18 in <i>P. saldanhai</i>, 16 in <i>P. shcherbachevi</i>, 15–16 in <i>P. thermophilum</i> vs. 12 in the new species). In comparison with the new species, <i>P. saldanhai</i> and <i>P. shcherbachevi</i> have a different lateral line configuration (ventral & mediolateral). <i>Pachycara caribbaeum</i> and <i>P. cousini</i> differ from the new species in having fewer caudal-fin rays (10 in <i>P. caribbaeum</i> and <i>P. cousini</i> vs. 11–12 in <i>P. angeloi</i> <b>sp. nov.</b>) and more gill rakers (13 in <i>P. caribbaeum</i>, 15 in <i>P. cousini</i> vs. 12 in <i>P. angeloi</i> <b>sp. nov.</b>). <i>Pachycara caribbaeum</i> differs also from the new species in having a pelvic fin (vs. no pelvic fin) and <i>P. cousini</i> also has more pectoral-fin rays than <i>P. angeloi</i> <b>sp. nov.</b> (17 vs. 13–15).</p> <p> <i>P. andersoni</i> and <i>P. priedei</i> differ also from the new species in having more pectoral-fin rays (18–20 in <i>P. andersoni</i>, 16–17 in <i>P. priedei</i>, vs. 13–15 in <i>P. angeloi</i> <b>sp. nov.</b>), more gill rakers (16–17 in <i>P. andersoni</i>, 14 in <i>P. priedei</i> vs. 12 in the new species) and different lateral line configurations (a ventral and mediolateral line in <i>P. andersoni</i> and <i>P. priedei</i> vs. a single mediolateral lateral line in the new species). Additionally, <i>P. priedei</i> has fewer caudal-fin rays (10) than <i>P. angeloi</i> <b>sp. nov.</b> (11–12).</p> <p> In comparison to the new species, <i>P. rimae</i> and <i>P. arabica</i> have fewer caudal-fin rays (10 and 9 vs. 11–12). Additionally, <i>P. arabica</i> differs from the new species in having more pectoral-fin rays (19 vs. 13–15) and gill rakers (17 vs. 12) as well as a different lateral line configuration (a ventromediolateral line vs. a single mediolateral lateral line). <i>Pachycara rimae</i> is also different from <i>P. angeloi</i> <b>sp. nov.</b> in having a pelvic fin (vs. no pelvic fin present in the new species), fewer caudal-fin rays (9 vs. 11–12), gill rakers (10 vs. 12) and suborbital pores (5 vs. 6–7).</p> <p> This paper describes the 29 th species of <i>Pachycara</i>, which is the 5 th to be described from specimens collected only from chemosynthetic environments and the 6 th known from the Indian Ocean.</p>Published as part of <i>Thiel, Ralf, Knebelsberger, Thomas, Kihara, Terue & Gerdes, Klaas, 2021, Description of a new eelpout Pachycara angeloi sp. nov. (Perciformes: Zoarcidae) from deep-sea hydrothermal vent fields in the Indian Ocean, pp. 99-112 in Zootaxa 4980 (1)</i> on pages 103-110, DOI: 10.11646/zootaxa.4980.1.6, <a href="http://zenodo.org/record/4883061">http://zenodo.org/record/4883061</a>
Developing a state communications campaign to reduce excessive alcohol use in Oregon: findings from a formative audience assessment
No full textMegan Gerdes, MPH (Interim Alcohol and Other Drug Prevention Services Manager, Oregon Health Authority), Victoria Buelow, MA (Lead Alcohol Research Analyst, Oregon Health Authority), Steven C. Fiala, MPH (Evaluation Lead, Oregon Health Authority), Kate Gunby, MA, PhD (Research Director, PRR), Diana Steeble, BA (Managing Principal and National Healthcare Lead, PRR), Chien-Yu Chen, MS, PhD (Research Associate, PRR), Jordan Tuia, BA (Senior Research Coordinator, PRR (former)), Anne Frugé, MA, PhD (Senior Research Associate, PRR).Title from PDF caption (viewed on April 7, 2023).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 (pages 31-32).Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Eco und die Anderen. Umberto Ecos Beitrag zur Übersetzungstheorie,
No full textWhat are the innovative parts of Umberto Eco's translation studies and where are they located in relation to contemporary theory? The first question is easy to answer, it is enough to mention the concept of "negotiation", which is already well known and has been discussed at length elsewhere. The second aspect, on the other hand, has not yet been fully studied and could indeed bring forth some surprises. Although Eco's model, as he himself admits, is not a theory in the strict sense of the word, but instead a series of reflections deriving from his experience as translator and translated author, his model does seek solutions for the aporias that always characterize this activity
Cauldron, Summer 1988
No full text27 p. :ill.Ink Drawing / Heather Laymon -- A Summer Time / Kris Bierschbach -- Two Views of a Banquet Table / Mary Gerdes -- Ninth Grade Social Studies Lesson / Gail Griffin -- Photograph / Benjamin R. Clarke -- #15324 / Pauline Harris -- an invitation for madame tuliptree / Heather Laymon -- I Want You Like Lightning / Heather Laymon -- Escape / Chad Perry -- Driver / Chad Perry -- Print / Alex Shakerin -- The Arrival / Jackie Reinstedler -- Bodies / Jackie Reinstedler -- Buddy System / Jackie Reinstedler -- Ink Drawing / Kit Almy -- Autumn Seance / Jon Riedel -- Man on the Street / Rebecca Young -- Vision After the Saline Injection / Rebecca Young -- Hawaii / Sarah Colegrove -- Pearls / Annemarie Statsick -- Fishies / Heather Laymon -- Man is the Tragedy / Anonymous
Identification and Analysis of Cognitive Errors - Application to Control Room Operators
No full textMechanical Maritime and Materials Engineerin
Black feminist rhetoric
No full textThis Black Feminist Rhetoric dissertation couples Sharon Crowley’s Toward a Civil Discourse and black feminist autoethnography as methods for critically narrating my personal experiences and reflections of black womanhood, particularly, in academia. My analysis is grounded in ideological criticism and autoethnography, as methods for studying black feminist rhetorical methodology. For the subject of my rhetorical analysis, I employ artifacts such as Brittney Cooper’s Beyond Respectability: The Intellectual Thought of Race Women (2017) and Eloquent Rage: A Black Feminist Discovers Her Superpower (2018), Roxanne Gay and Dr. Tressie McMillan Cottom’s Luminary podcast Hear to Slay, and Beyoncé’s recent Netflix documentary Homecoming. Thus, black feminist rhetoric can employ pop culture artifacts, as a method of ideological critique, in academic spaces, for inventing rhetorical arguments that challenge historically oppressive systems and institutions of power
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