17,385 research outputs found
Author Correction: Evaluation of skin cancer resection guide using hyper‑realistic in‑vitro phantom fabricated by 3D printing
No full textThe original version of this Article contained an error in the spelling of the author Taehun Kim which was incorrectly given as Teahun Kim. The original Article has been corrected
Brad Thompson, Kim Hallett, Irv Wiswall, and Susan Barnes Whyte READ Poster
No full textBrad Thompson, Associate Professor of Mass Communication, Kim Hallett, Irving Wiswall, Chief Technology Officer, and Susan Barnes Whyte, Library Director, reading Over the Edge: Death in Grand Canyon, by Michael P. Ghiglieri and Thomas M. Myers.https://digitalcommons.linfield.edu/libraries_read/1086/thumbnail.jp
Investigating the Effects of Hydrogen Bonding on Mechanical and Electrical Properties of n-Type Semicrystalline Polymers
No full textDesigning conjugated polymers with both excellent electrical properties and mechanical robustness is a prerequisite for their application in wearable and portable electronics. However, many of the efficient conjugated polymers are mechanically brittle due to their strong semicrystallinity, and only the limited amorphous parts contribute to the overall tensile properties. Here, we have incorporated monomers with hydrogen bonding (H-bonding) functionalized side chains (Qx-thymine and T-diaminopyrimidine) into the backbone of the naphthalene diimide-based semicrystalline polymer, N2200, to yield electroactive polymers with high electrical properties and stretchability, facilitated by dynamic bonding-assisted intermolecular assembly. To elucidate the impact of H-bonding on polymer properties, we systematically compare the mechanical and electrical properties, among the reference N2200 polymer, N2200-based terpolymers (Qx10 and Ester10) having side chains without H-bonding, and N2200-based terpolymers (Thy10 and Dap10) having Q(X)-thymine and T-diaminopyrimidine side chains. Interestingly, introducing H-bonding units into polymers promotes the formation of intermolecular assembly while reducing the critical molecular weight (M-c) of the polymer chain, thus facilitating the formation of tie-molecules and entanglement networks. Specifically, Thy10 polymers, with a weight-average molecular weight (M-w) of 133 kg mol(-1), achieve a significantly higher stretchability with crack-onset strain (COS) = 49.3% compared to those of the N2200 (M-w = 180 kg mol(-1), COS= 3.2%) and Qx10 polymers (M-w = 144 kg mol(-1), COS = 23.7%) with comparable M-w. Furthermore, Thy10 exhibits superior crystalline properties and more efficient charge transport compared with Qx10, highlighting the utility of H-bonding-capable conjugated polymers in wearable electronics.
The apolipoprotein AII rs5082 variant is associated with reduced risk of coronary artery disease in an Australian male population
No full textAbstract not availableJing Xiao, Fan Zhang, Steven Wiltshire, Joseph Hung, Michelle Jennens, John P. Beilby, Peter L. Thompson, Brendan M. McQuillan, Pamela A. McCaskie, Kim W. Carter, Lyle J. Palmer, Brenda L. Powel
Erectile dysfunction as a predictor for subsequent atherosclerotic cardiovascular events: Findings from a linked-data study
No full textKew-Kim Chew, Judith Finn, Bronwyn Stuckey, Nicholas Gibson, Frank Sanfilippo, Alexandra Bremner, Peter Thompson, Michael Hobbs and Konrad Jamrozi
Author Correction: El Niño–Southern Oscillation complexity (Nature, (2018), 559, 7715, (535-545), 10.1038/s41586-018-0252-6)
No full textIn this Review, the middle initial of author Kim M. Cobb was omitted. The original Review Article has been corrected online. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.11Nsciescopu
M/NEM devices and uncertainty quantification
No full textSubmission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-05-01The student, Namjung Kim, accepted the attached license on 2018-01-19 at 10:43.The student, Namjung Kim, submitted this Dissertation for approval on 2018-01-19 at 11:49.This Dissertation was approved for publication on 2018-01-23 at 13:14.Recent advances in computing power have facilitated the use of computational simulations as design guidelines in a range of fields including the semiconductor industry, biosensors, microfluidic devices, and even nano-sized devices. Although simulation can capture the physics behind the experiment, deterministic simulations with parameters derived from least-square fitting are significantly limited for understanding output distributions from experiments. This deviation between computational simulation and experiment may arise for a number of reasons: the stochastic nature of design parameters, external environmental fluctuations, measurement noise, and so forth. These are called uncertainties. Understanding the effect of these uncertainties is important in manufacturing processes, because manufacturing processes incorporate multi-scale and multi-physics sub-steps, with uncertainties in inputs accumulated and propagated through the sub-steps, resulting in significant deviations in the performance of final products.
A systematic approach to understanding the variations in the output from various uncertainty sources is called uncertainty quantification (UQ). To integrate uncertainty quantification fully into the design process, the sources of uncertainty must be identified and quantified; then, the uncertainty needs to be characterized and parameterized to create a statistical model. The parameterized statistical model is fed into a physics-based deterministic model (e.g., a finite element model) to quantify the deviations in the final products arising from the uncertainty parameters. By understanding the effect of stochastic parameters in inputs as well as manufacturing processes, computational simulations can provide more reliable design guidelines across a range of manufacturing fields.
This dissertation consists of two parts. The first part describes how simulation can assist in understanding experimental results. The specific physical systems considered in this dissertation are a MEMS-based resonator (Chapter 2) and a microfluidic device (Chapter 3). The results show that simulation is a powerful tool for describing details of experimental results that cannot be explained easily due to the complexity of the systems. However, distinctive discrepancies between the results from current computational predictions and experiments still exist, especially when various uncertainties are present. Therefore, the second part of this dissertation is devoted to developing a systematic approach to modeling stochastic input variables through experimental data, and describing how this can be incorporated into a modeling framework.
This dissertation suggests a systematic approach to developing a finite element model that can estimate the mechanical properties of final products with spatial uncertainties in the 3D printing process (Chapter 4), and those arising from variations in microstructure in the die-casting process (Chapter 5). Those input uncertainties are extracted from the images of final products. The data-driven modeling approach with Gaussian process is proposed to consider the probabilistic behavior of uncertainties. The realizations sampled from the calibrated Gaussian process model are incorporated into the deterministic model, generating more realistic simulation model. The systematic approach developed in this study can assist in understanding the effect of input uncertainties on the variance of the mechanical performance of final products from 3D printing and die-casting. This approach will be beneficial to other manufacturing processes where input uncertainties are important.DSpace SAF Submission Ingestion Package generated from Vireo submission #12016 on 2018-08-31 at 17:24:37Made available in DSpace on 2018-09-04T20:46:44Z (GMT). No. of bitstreams: 3
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Previous issue date: 2018-01-23Embargo set by: Seth Robbins for item 107335
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DNS of turbulent mixing layers with variable density
No full textWe present some preliminary results of direct numerical simulations of three-dimensional, temporal, plane mixing layers with variable density. The simulations are run with a parallel in-house code that solves the Navier-Stokes equations in the Low-Mach number approximation, using a novel algorithm based on an extended version of the velocity-vorticity formulation used by Kim, Moin & Moser (1987) for incompressible flows. The simulations are run with Pr=0.7 and achieve Re_lambda=90-110 during the self-similar evolution of the mixing layer. Four cases with density ratios s=1,2,4 and 8 are presented. Our results show good agreement with previous experimental and numerical studies, and allow us to characterize the scales in the temperature spectra
Reactor physics project progress report
No full textStatement of responsibility on title page reads: Editors: M.J. Driscoll and T.J. Thompson; Contributors: F.M. Clikeman, J.N. Donohew, M.J. Driscoll, J.D. Eckard, T.L. Harper, Y. Hukai, I. Kaplan, C.H. Kim, Y.-M. Lefevre, T.C. Leung, N.R. Ortiz, N.C. Rasmussen, C.S. Rim, S.S. Seth, A.T. Supple C. Takahata, and T.J. Thompson"MIT-3944-1."Progress report; September 30, 1968U.S. Atomic Energy Commission contract AT(30-1)-394
Stygiopontius horridus Lee & Kim & Kim 2020, n. sp.
No full text<i>Stygiopontius horridus</i> n. sp. <p>(Figs 13–16)</p> <p>http://zoobank.org/ C29CE293-4E24-4182-A215-D555443CA734</p> <p> <b>Material examined.</b> Twenty three females, eight males, and one copepodid I in amplexus with a male adult, from washings of invertebrates at GTV1702 (19°33.387´S, 65°50.893´E, depth 2507 m), the Solitaire vent field on the Central Indian Ridge in the Indian Ocean, 01 August 2017. Holotype (female, MABIK CR00244731) and paratypes (20 females and seven males, MABIK CR00244732) have been deposited in the Marine Biodiversity Institute of Korea (MABIK), Seocheon. Dissected paratypes (two females and one male) are retained in the collection of the junior author.</p> <p> <b>Additional material examined.</b> Seven females and two males from washings of invertebrates, at GTV 1807 (19°33.395´S, 65°50.889´E, depth 2634 m), the Solitaire vent field, 20 June 2018.</p> <p> <b>Female.</b> Body (Fig. 13A) moderately broad and 1.24 mm long. Prosome 710 × 545 μm. Cephalothorax 445 μm long, with angular posterolateral corners. Three metasomites with rounded posterolateral corners. Urosome (Fig. 13B) 5-segmented. Fifth pedigerous somite 149 μm wide; lateral apices not pointed. Genital double-somite 190 × 163 μm, distinctly longer than wide, with slightly expanded anterior two-fifths; genital aperture located dorsolaterally at 30% region of double-somite length. Three free abdominal somites 73 × 104, 49 × 99, and 46 × 98 μm, respectively, smooth without spinules or setules on all surfaces. Caudal rami (Fig. 13C) stout and slightly convergent; each ramus 72 × 42 μm, 1.71 times as long as wide, with tapering posteroventral margin and six naked setae; innermost distal seta as long as outermost distal seta. Egg sac (Fig. 13D) containing two or three eggs; each egg about 195 μm in diameter.</p> <p>Rostrum absent.Antennule (Fig. 13E) relatively short, 273 μm long, and 10-segmented; third segment short and incompletely articulated from second segment; first segment the longest; armature formula 15, 8, 2, 4, 2, 2, 2, 2, 2 + aesthetasc, and 13; setae naked and mostly short. Antenna (Fig. 13F) massive. Articulation between coxa and basis incomplete. Exopod small, 10 × 6 μm, with three setae. First endopodal segment unarmed but with large tubercle on inner side. Second endopodal segment (Fig. 13G) 31 × 21 μm, with two blunt spiniform setae (one on inner margin and the other on distal margin) and two robust spines tipped with bundle of spinules.</p> <p>Oral cone short, stout. Mandible (Fig. 13H) with more than ten teeth distally and hyaline lamella subdistally. Maxillule (Fig. 13I) with both lobes bearing nearly parallel lateral margins; inner lobe with three setae; outer lobe subequal in length to inner lobe, with three setae; setae of outer lobe distinctly longer than those of inner lobe. Maxilla (Fig. 13J) with broad, unarmed syncoxa; basis hook-like, with fine spinules near middle; seta arising between segments naked and much shorter than basis. Maxilliped (Fig. 13K) 4-segmented; seta on syncoxa and basis small; endopod 2-segmented, but proximal segment subdivided by rudimentary articulation; proximal segment with two small setae; distal segment about 28 μm long, distally with one large seta; terminal claw 93 μm long, smooth, with denticle subdistally.</p> <p>Legs 1–3 (Fig. 14A–C) with 3-segmented rami. Leg 4 (Fig. 14D) with 3-segmented exopod and 2-segmented endopod. All of these legs lacking inner coxal seta. Basis of leg 1 with mammillary process (indicated by arrowhead in Fig. 14A) at inner distal corner and thin, needle-shaped seta near base of endopod. Leg 4 with first exopodal segment bearing almost naked inner seta; third exopodal segment armed with three spines and four setae; first endopodal segment small, 26 × 23 μm; second endopodal segment 87 × 37 μm, much broader than first segment, with slightly undulating outer margin and terminal spine of 63 μm long. Armature formula of legs 1–4 as follows:</p> <p>Coxa Basis Exopod Endopod</p> <p>Leg 1: 0-0 1-1 I-1; I-1; III, 2, 2 0-1; 0-2; 1, 2, 3</p> <p>Leg 2: 0-0 1-0 I-1; I-1; III, I, 4 0-1; 0-2; 1, 2, 3</p> <p>Leg 3: 0-0 1-0 I-1; I-1; III, I, 5 0-1; 0-2; 1, I, 3</p> <p>Leg 4: 0-0 1-0 I-1; I-1; II, I, 4 0-0; 0, I, 1</p> <p>Leg 5 (Fig. 14E) 1-segmented, clearly articulated from somite, 77 × 54 μm, 1.43 times as long as wide, with four naked setae, innermost one of them thin. Leg 6 not seen in genital aperture (Fig. 13B).</p> <p> <b>Male.</b> Body (Fig. 15A) markedly smaller than that of female, 776 μm long. Prosome 465 × 375 μm. Cephalo- thorax 306 μm long, frontally truncate. Urosome (Fig. 15B) 6-segmented. Fifth pedigerous somite 95 μm wide, with angular lateral apices. Genital somite 79×138 μm, much wider than long, with rounded corners. Four abdominal somites 50 × 98, 45 × 86, 28 × 72, and 33 × 72 μm, respectively, with convex lateral margins. Anal somite with several minute spinules on ventral surface near base of caudal rami (Fig. 15C). Caudal ramus (Fig. 15C) 50 × 30 μm, 1.67 times as long as wide; ventrodistal apex bilobed.</p> <p> <b>FIG. 13.</b> <i>Stygiopontius horridus</i> n. sp., female. A, habitus, dorsal; B, urosome, dorsal; C, anal somite and caudal rami, dorsal; D, egg sac; E, antennule; F, antenna; G, terminal segment of antenna; H, mandible; I, maxillule; J, maxilla; K, maxilliped. Scale bars: A, D = 0.2 mm; B = 0.1 mm; C, E, K = 0.05 mm; F–J = 0.02 mm.</p> <p> <b>FIG. 14.</b> <i>Stygiopontius horridus</i> n. sp., female. A, leg 1; B, leg 2; C, leg 3; D, leg 4; E, leg 5. Scale bars: 0.05 mm. <b>FIG. 15.</b> <i>Stygiopontius horridus</i> n. sp., male. A, habitus, dorsal; B, urosome, ventral; C, caudal rami, ventral; D, antennule; E, coxa, basis and endopod of leg 1; F, leg 5. Scale bars: A = 0.1 mm; B, E = 0.05 mm; C, D, F = 0.02 mm.</p> <p>Rostrum absent. Antennule (Fig. 15D) stout, strongly recurved, and 13-segmented; armature formula 1, 2, 12, 1, 4, spine+1, 1, 4, 2, 2, 2, 1+aesthetasc, and 12; fifth segment with about three vestiges of articulations on posterior side; sixth segment with outgrowth bearing two spiniform processes, its terminal spine with small warts on all surfaces and tipped with short seta; eighth segment with two blunt processes on anterior margin, each tipped with seta; eleventh and twelfth segments respectively with two and three distally-directed processes on anterior margin. Antenna as in female.</p> <p> <b>FIG. 16.</b> <i>Stygiopontius horridus</i> n. sp., copepodid I. A, habitus, dorsal; B, urosome, ventral C, antennule; D, antenna; E, mandible; F, maxillule; G, maxilla; H, maxilliped; I, leg 1; J, leg 2. Scale bars: A = 0.1 mm; B, I, J = 0.05 mm; C, D, G, H = 0.02 mm; E, F = 0.01 mm.</p> <p>Oral cone, mandible, maxillule, maxilla, and maxilliped as female.</p> <p>Leg 1 with first endopodal segment covered with numerous spinules on outer surface (Fig. 15E). Legs 2–4 as in female.</p> <p>Leg 5 (Fig. 15F) 2-segmented, but protopod short and not articulated from somite, with long outer seta; exopod 27 × 25 μm, with three setae on outer margin (middle one longer than other two) and two spiniform, blunt setae on distal margin; latter two distal setae sclerotized in proximal two-thirds and lamellate in distal third. Leg 6 represented by two unequal setae on genital operculum (Fig. 15B).</p> <p> <b>Copepodid I.</b> Body (Fig. 16A) 5-segmented, 422 μm long. Prosome consisting of cephalothorax and second pedigerous somite. Cephalothorax 213 × 193 μm, gradually narrowing posteriorly. Urosome (Fig. 16B) 3-seg- mented; first urosomite being third pedigerous somite. Second urosomite 30 × 57 μm, broadening posteriorly, with angular posterolateral corners. Anal somite 50 × 53 μm, with convex lateral margins. Caudal ramus 32 × 20 μm, with six setae; longest inner distal seta bipinnate; second longest outer distal seta pinnate along inner margin and finely spinulose along outer margin.</p> <p>Rostrum absent. Antennule (Fig. 16C) 3-segmented; second segment short; armature formula 3, 1, and 11 + 2 aesthetascs. Antenna (Fig. 16D) stout. Syncoxa and basis smooth. Exopod with two distal setae. Endopod 2-segmented; first segment unarmed; second segment with two setae and two broad, spiniform elements, one of latters with spinules at distal region.</p> <p>Oral cone short. Mandible (Fig. 16E) denticulate distally, with hyaline lamella at distal three-fourths. Maxillule (Fig. 16F) bilobed; outer and inner lobes with three and two setae, respectively. Maxilla (Fig. 16G) basically as in adult. Maxilliped (Fig. 16H) 4-segmented; syncoxa and basis unarmed; first and second endopodal segments each with one seta; terminal claw with spinules at distal region.</p> <p>Leg 1 (Fig. 16I) and leg 2 (Fig. 16J) biramous, both rami 1-segmented and lacking inner coxal seta. Basis of leg 1 with spinules along inner distal margin. Armature formula of these two legs as follows:</p> <p>Coxa Basis Exopod Endopod</p> <p>Leg 1: 0-0 1-0 IV, I, 3 1, 2, 4</p> <p>Leg 2: 0-0 1-0 III, I, 3 1, 2, 3</p> <p>Leg 3 (Fig. 16B) bilobed; outer lobe (exopod) with two setae; inner lobe unarmed. Legs 3–6 absent.</p> <p> <b>Etymology.</b> The specific name <i>horridus</i>, from Latin <i>horrid</i> (prickly), alludes to the prickly tip of the distal spines of the antenna.</p> <p> <b>Remarks.</b> <i>Stygiopontius horridus</i> n. sp. possesses the characteristic antenna and maxillule, typifying the new species. The antenna has a large tubercle on the first endopodal segment and two spinule-tipped distal spines on the second endopodal segment. The maxillule has only three (not four) setae on the inner lobe. Because these features are not shared by its congeners, the new species is easily distinguishable from other species in the genus.</p> <p>Ivanenko (1998) recorded copepodid I of a dirivultid copepod found in plankton over a hydrothermal vent on the Mid-Atlantic Ridge. This copepodid I appears to be different from our specimen from the Indian Ocean mainly in body length (0.37 mm in Ivanenko’s specimens), antennular segmentation (4-segmented in Ivanenko’s specimens) and setation, and the morphological features of the antenna (three setae on the exopod and an elongate terminal spine on the second endopodal segment in Ivanenko’s specimens).</p> <p>The discovery of a copepodid I juvenile in amplexus with a male adult in the vent community implies that copepodid I of this species stays on the bottom of the vent field and that mate guarding may take place as early as the female copepodid I stage.</p>Published as part of <i>Lee, Jimin, Kim, Dongsung & Kim, Il-Hoi, 2020, Copepoda (Siphonostomatoida: Dirivultidae) from Hydrothermal Vent Fields on the Central Indian Ridge, Indian Ocean, pp. 301-337 in Zootaxa 4759 (3)</i> on pages 320-326, DOI: 10.11646/zootaxa.4759.3.1, <a href="http://zenodo.org/record/3741134">http://zenodo.org/record/3741134</a>
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