80 research outputs found
Contact velocities of small ellipsoids settling in turbulence
No full textCollisions of small and heavy non-spherical particles settling in turbulence are very important for systems such as ice clouds and proto-planetary disks where the particle spectra evolution is strongly dependent on the collision induced growth rate. Still, the influence of the particle shape on the collision probability is virtually unknown. Building on our recent investigation on the collision rate of monodisperse suspensions of ellipsoidal particles (Siewert et al., J. Fluid Mech. 758, 686-701, 2014), we show theoretically and by direct numerical simulations that the behavior of ellipsoids subject to turbulence and gravity is different from the behavior of spheres. Due to the dependence of the particle settling velocity on the particle orientation, the relative velocity at contact is influenced by turbulence. When ellipsoids differ either by mass or shape, their contact velocity is randomized by the randomized particle orientation. For particles much heavier than the fluid these orientation dependent settling velocity differences are larger than the relative velocities directly induced by the turbulent fluctuations
Telemiades quammeni Siewert, Mielke & Casagrande 2020, sp. nov.
No full textTelemiades quammeni Siewert, Mielke & Casagrande, sp. nov. (Figs 66–69, 159, 195, 212) Diagnosis. Telemiades quammeni Siewert, Mielke & Casagrande, sp. nov. is easily distinguished from other species of the “ corbulo group” by the ground color brown in both sexes, without bluish or purple reflections. Besides, it’s the only known species of the group with records in Atlantic Forest areas. Description. Head: frons and vertex dark brown. Eyes surrounded by white scales. Labial palpi with first and second segments dark brown and greyish; third segment dark brown. Antennae dark brown, base of each segment ventrally cream from the second half towards apiculus; nudum of 25–27 segments. Thorax: dorsally dark brown; ventrally dark brown and greyish. FW: length of males 19–21 mm (n=12) and females 21–24 mm (n=10). DFW (Figs 66, 68): ground color dark brown in males and light brown in females; dark spot on basal area extending until the half of wing; six dark brown submarginal spots in R 5 –M 1, M 1 –M 2, M 2 –M 3, M 3 –CuA 1, CuA 1 –CuA 2 and CuA 2 –2A; three apical hyaline spots in R 3 –R 4, R 4 –R 5 and R 5 –M 1, the last smaller. DHW (Figs 66, 68): ground color dark brown in males and light brown in females; dark spot in basal area; submarginal dark brown spots as an irregular band in Rs–M 1, M 1 –M 2, M 2 –M 3, M 3 –CuA 1, CuA 1 –CuA 2 and CuA 2 – 2A; males with a tuft of long dark hair–like scales in Sc–R 1 –Rs; oval greyish patch under the tuft of androconial scales. VFW (Figs 67, 69): as DFW; ground color dark brown; spots darker; males with oval cream patch below CuA 2 –2A. VHW (Figs 67, 69): as DHW; ground color light brown; spots darker. Abdome: dorsally dark brown; ventrally dark brown and greyish. Male genitalia (Fig. 159): tegumen rounded; distal margin with two pairs of lateral apophysis with half size of uncus. Anterior projection of saccus triangular, anterior margin rounded. Uncus shorter, about 1/2 the length of tegumen; distal margin with two lateral apophysis rounded with median region truncated. Valva rectangular, twice as long as wide; costa rectangular; distal process of harpe long and rounded, with margin serrated and dorsal process with a spine–like projection curved inwards; sacculus rectangular, about 1/2 the length of valva. Fultura inferior distally bifid, with distal margin rounded and base truncated. Aedeagus cylindrical, insertion of manica the middle of aedeagus; opening for ejaculatory bulb rounded; distal margin truncated; opening for vesica dorsal, about 1/3 of size of aedeagus; cornuti as numerous spines, all with same size. Female genitalia (Fig. 196): tergum VIII rounded; papilla analis covered by scales on apical third; posterior apophysis with same size of papilla. Lamella antevaginalis rectangular. Lamela postvaginalis rectangular and bifid, distal margin truncated. Ductus bursae membranous, sclerotized proximally of ostium, corpus bursae membranous and globular, with same size of ductus; signa absent. Distribution. Telemiades quammeni sp. nov. occurs in Altantic Forest areas, being registered from the Brazilian states of Pernambuco to Paraná. Etymology. This species is named to honor David Quammen, an American science, nature and travel writer, and author of several books, including “The Song of the Dodo”, “Spillover”, and “The Flight of the Iguana”. Taxonomic discussion. Telemiades quammeni sp. nov. is easily distinguished from the other species of the “ corbulo group” by the absence of blue and purple reflections on DW, and to the distribution restricted to the Atlantic Forest. In addition, there is a significant difference in the morphological patterns of the male and female genitalia when compared to the other species of the “ corbulo group”. Type material. Holotype male deposited at DZUP–OM with the following labels: / HOLOTYPUS / Cacatu, Antonina P [a]R[aná] [Brazil], 25–IV–87 20m, Mielke leg./ OM 14.182 / Holotypus Telemiades quammeni Siewert, Mielke & Casagrande det. 2019/. Allotype female deposited at DZUP with the following labels: / ALLOTYPUS / Alexandra Paraná—Brasil 12–IV–1969 O. Mielke leg./ DZ 26.385/ Allotypus Telemiades quammeni Siewert, Mielke & Casagrande det. 2019/. Paratypes. BRAZIL: Pernambuco— Recife, Camaragibe, 2–X–1968, 1 male, Ebert leg., ex–coll. Ebert, DZ 26.387 (DZUP). Bahia— Camacan, Serra Bonita, 27–XI–14–XII–2005, 1 male, Emery leg., ex–coll. Emery, DZ 34.043 (DZUP); Mucuri, 20–VI–1968, 1 female, C. Elias leg., DZ 26.382 (DZUP). Espírito Santo— Conceição da Barra, 5–IV–1968, 1 female, C. & C. T. Elias leg., DZ 2.952* (DZUP); 4–IX–1969, 1 male, C. & C. T. Elias leg., DZ 26.377 (DZUP); 10–IX–1969, 1 female, C. & C. T. Elias leg., DZ 26.384 (DZUP); XII–1985, 1 male, Elias leg., DZ 26.371 (DZUP); Linhares, 28–III–1970, 1 male, C. Elias leg., DZ 26.372 (DZUP); 9–14–IV–1973, 1 female, C. Elias leg., DZ 26.380 (DZUP); 11–16–VI–1973, 1 male, C. Elias leg., DZ 3.846* (DZUP); 25–30–VI–1973, 1 male and 2 females, C. Elias leg., DZ 26.376, DZ 26.383, DZ 26.391 (DZUP); 12–17–VIII–1974, 1 male, C. Elias leg., DZ 26.375 (DZUP); 19–24–VIII–1974, 1 female, C. Elias leg., DZ 26.381 (DZUP); XI–1978, 1 male, C. Elias leg., DZ 26.373 (DZUP). Minas Gerais— Marliéria, Parque Estadual do Rio Doce, 200 m, 14–XII–1972, 1 male, H. & H. D. Ebert leg., ex–coll. Ebert, DZ 26.379 (DZUP); 15–XII–1972, 1 male, H. & H. D. Ebert leg., ex–coll. Ebert, DZ 26.378 (DZUP); 350 m, 8–9–III–1994, 2 males, Mielke leg., DZ 26.388, DZ 26.389 (DZUP). Rio de Janeiro— Angra dos Reis, VI–1934, 1 female, Travassos leg., OM 12.773 * (DZUP–OM); Cachoeiras de Macacu, Boca do Mato, 17–V–1992, 1 female, N. Tangerini leg., ex–coll. Tangerini, DZ 36.137 (DZUP); Duque de Caxias, Imbariê, 150 m, 15–II–1966, 1 female, Ebert leg., ex–coll. Ebert, DZ 26.390 (DZUP); 16–II–1966, 1 female, Ebert leg., ex–coll. Ebert, DZ 26.386 (DZUP); Petrópolis, 16–V–1969, 1 male, Ebert leg., ex–coll. Ebert, OM 39.543 * (DZUP–OM). Paraná— Antonina, Cacatu, 20 m, 20–IV–1987, 1 female, Mielke leg., DZ 14.044 (DZUP); 25–IV–1987, 2 males and 2 females, Mielke leg., OM 14.162, OM 14.163, DZ 14.181, DZ 14.183* (DZUP–OM); 15–IV–2003, 1 female, Mielke leg., OM 60.752 (DZUP–OM); Paranaguá, Alexandra, 12–IV–1969, 1 male, Mielke leg., DZ 26.374 (DZUP); Querência do Norte, RPPN Fazenda da Mata, 22° 58’ 60’’ S, 53º 31’ 59’’ W, 5–X–2012, 1 male, LABLEP leg., DZ 36.136 (DZUP); RPPN Fazenda Santa Fé, 23° 05’ 37’’S, 53° 35’ 43’’W, 11–12-IX-2018, 7 males, Casagrande, Mielke, Carneiro & Orlandin leg., DZ 47.101, DZ 47.102, DZ 47.092, DZ 47.091, DZ 47.112, DZ 47.111, DZ 47.113 (DZUP).Published as part of Siewert, Ricardo Russo, Mielke, Olaf Hermann Hendrik & Casagrande, Mirna Martins, 2020, Taxonomic revision of the Neotropical genus Telemiades Hübner, [1819] (Lepidoptera: Hesperiidae: Eudaminae), with descriptions of fourteen new species, pp. 1-111 in Zootaxa 4721 (1) on pages 45-46, DOI: 10.11646/zootaxa.4721.1.1, http://zenodo.org/record/360290
Esophagectomy or Total Gastrectomy for Siewert 2 Gastroesophageal Junction (GEJ) Adenocarcinoma? A Registry-Based Analysis
No full text\ua9 2021, The Author(s).Backgrounds: Due to a lack of randomized and large studies, the optimal surgical approach for Siewert 2 gastroesophageal junctional (GEJ) adenocarcinoma remains unknown. This population-based cohort study aimed to compare survival between esophagectomy and total gastrectomy for the treatment of Siewert 2 GEJ adenocarcinoma. Methods: Data from the National Cancer Database (NCDB) from 2010 to 2016 was used to identify patients with non-metastatic Siewert 2 GEJ adenocarcinoma who received either esophagectomy (n = 999) or total gastrectomy (n = 8595). Propensity score-matching (PSM) and multivariable analyses were used to account for treatment selection bias. Results: Comparison of the unmatched cohort’s baseline demographics showed that the patients who received esophagectomy were younger, had a lower burden of medical comorbidities, and had fewer clinical positive lymph nodes. The patients in the unmatched cohort who received gastrectomy had a significantly shorter overall survival than those who received esophagectomy (median, 47 vs. 68 months [p < 0.001]; 5-year survival, 45 % vs. 53 %). After matching, gastrectomy was associated with significantly reduced survival compared with esophagectomy (median, 51 vs. 68 months [p < 0.001]; 5-year survival, 47 % vs. 53 %), which remained in the adjusted analyses (hazard ratio [HR], 1.22; 95 % confidence interval [CI], 1.09–1.35; p < 0.001). Conclusions: In this large-scale population study with propensity-matching to adjust for confounders, esophagectomy was prognostically superior to gastrectomy for the treatment of Siewert 2 GEJ adenocarcinoma despite comparable lymph node harvest, length of stay, and 90-day mortality. Adequately powered randomized controlled trials with robust surgical quality assurance are the next step in evaluating the prognostic outcomes of these surgical strategies for GEJ cancer
Data and code for "Separation of spectrally overlapping fluorophores using intra-exposure excitation modulation"
No full textRepresentative data and source code for the manuscript "Separation of spectrally overlapping fluorophores using intra-exposure excitation modulation"Nanoscale live-cell activity sensing using smart probes and imaging. European Commission. awardNumber:714688. https://doi.org/10.13039/501100000780Focus on Advancing Spatial and Temporal Resolution of 3D Structured Illumination Microscopy. European Commission. awardNumber:752080. https://doi.org/10.13039/501100000780FWO (G090819N)FWO (G0B8817N)Katholieke Universiteit Leuven, through grant C14/17/111We thank Viola Mönkemöller for supporting initial experiments and analysis related to this work. Siewert Hugelier and Sam Duwé thank the Research Foundation - Flanders (FWO) for a postdoctoral fellowship.
This work was supported through funding from the FWO, through grants G090819N and G0B8817N; the European Research Council, through grant 714688 NanoCellActivity; and the Katholieke Universiteit Leuven, through grant C14/17/111. This project also received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 752080
Self Assembly of Modular Robots with Finite Number of Modules Using Graph Grammar
No full textWe wish to design decentralized algorithms for self-assembly of robotic modules that have 100% yield even if the number of available building blocks is limited, and specically when the number of available building blocks is identical to the number of blocks required by the structure. In contrast to self-assembly at the nano and micro scales where abundant building blocks are available, modular robotic systems need to self-assemble from a limited number of modules. In particular, when self-assembly is used for reconguration, it is desirable that the new conformation includes all of the available modules. We propose a suite of algorithms that (1) generate a reversible graph grammar, i.e., generates rules for a desired structure that allow the structure not only to assemble, but also to disassemble, and (2) have a set of structures that are growing in parallel converge to a single structure using broadcast communication. We show that by omitting a reversal rule for the last attached module, self-assembly eventually completes, and that communication can drastically speed up this process. We verify our results by running simulations on Matlab and Player/Stage 2D simulato
Self Assembly of Modular Robots with Finite Number of Modules Using Graph Grammar
No full textWe wish to design decentralized algorithms for self-assembly of robotic modules that have 100% yield even if the number of available building blocks is limited, and specically when the number of available building blocks is identical to the number of blocks required by the structure. In contrast to self-assembly at the nano and micro scales where abundant building blocks are available, modular robotic systems need to self-assemble from a limited number of modules. In particular, when self-assembly is used for reconguration, it is desirable that the new conformation includes all of the available modules. We propose a suite of algorithms that (1) generate a reversible graph grammar, i.e., generates rules for a desired structure that allow the structure not only to assemble, but also to disassemble, and (2) have a set of structures that are growing in parallel converge to a single structure using broadcast communication. We show that by omitting a reversal rule for the last attached module, self-assembly eventually completes, and that communication can drastically speed up this process. We verify our results by running simulations on Matlab and Player/Stage 2D simulato
Leica
No full textExhibiting artists: Narella Autio, Alex Cyreszko, Agnes T. Earl, Ashley Gilbertson, Steven Lojewski, Sam McQuillan, Simon O'Dwyer, Trent Parke, Stephen Rooke, Dean Sewell, Steven Siewert, Matthew Sleeth, Tamara Voninski, Sandra Walker, Marzene Wasikowska.
"Tour itinerary: CCP, Melbourne, Vic., Aug.-Sep. 2001 ... Mildura Art Centre, Mildure, Vic. Apr-May 2003" -- Back cover.CCP Documentary Photography Exhibition + Award.Essays by Edward Colless and Tessa Dwyer
InSAR measured permafrost degradation of palsa peatlands in northern Sweden Datasets
No full text<p>Datasets used in the writing of "InSAR measured permafrost degradation of palsa peatlands in northern Sweden" published in The Cryosphere. </p>
<p>The processed interferometric data and deformation maps are commercially sensitive and<br>may be made available upon reasonable request (by email) from the corresponding author.</p>
SmartCam - Computational Photometer
No full textUnited States Department of Homeland Security
University of Alaska Anchorag
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