cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Particle mass transfer coefficients for cocurrent gas-liquid flow in packed beds.
Creators: name: Yang, Ching-Shi.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1978
Subjects: subject: Engineering, Chemical.

description: Particle-liquid mass transfer coefficients were determined by measuring the rate of dissolution of benzoic acid into water in a packed bed column with downward cocurrent flows. The packing consisted of 6.35 mm Berl saddles coated with benzoic acid and fluorescent dye mixture. The water flow rate was varied between 2.1 and 98 kg/m2 sec and the air flow rate between 0.33 and 1.77 kg/m2 sec covering the gas continuous, transition, pulsing, and dispersed bubble flow regimes. The effect of the gas flow rate on the mass transfer coefficient is less important in the trickling and dispersed bubble flow regimes and becomes significant in the transition and pulsing flow regimes. Correlations in terms of modified Sherwood number and modified Reynolds number are presented.
Syncope and presyncope as presenting complaint or discharge diagnosis in the emergency department : An administrative data validation study
Creators: name: Staples, John
name: Vadeanu, Cristian
name: Gu, Bobby
name: Erdelyi, Shannon
name: Chan, Herbert
name: Brubacher, Jeffrey
Publisher: name: Elsevier
Year: 2022

description: Emergency department (ED) visits for syncope are common. Validation of ED administrative diagnostic coding for syncope is required before these codes can be used for health services research. We performed a retrospective multicentre chart review using a regional ED database in British Columbia. We identified adults visiting one of 3 high-volume urban EDs between 2010 and 2015. Cohort 1 included 350 ED visits with a presenting complaint (PC) of syncope/presyncope, a discharge diagnosis (DD) of syncope and collapse, or both. Cohort 2 included 100 ED visits with neither a PC of syncope/presyncope nor a DD of syncope and collapse. The reference standard was abstractor conclusion regarding syncope and presyncope (“definite/very likely” vs “possible” vs “unlikely” vs “absent”) after structured review of ED medical records. We found that in Cohort 1, syncope or presyncope were definite/very likely or possible in 96% of visits with a PC of syncope/presyncope and a DD of syncope and collapse. Syncope alone was definite/very likely in only 56% of visits. In Cohort 2, syncope was definitely absent for 94% of patients. The reference standard demonstrated excellent face validity and abstractor inter-rater agreement (Cohen’s kappa > 0.80). Vital signs and orthostatic vital signs were not documented for 8% and 84% of visits, respectively. Our results suggest that a PC of syncope/presyncope combined with a DD of syncope and collapse is highly predictive of syncope or presyncope. These findings will inform design and interpretation of syncope health services research.
Nucleophilic displacement reactions of benzyl chlorides.
Creators: name: Tsai, Yeh-Huey.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1968
Subjects: subject: Chemistry, Organic.

description: The rates of reactions of methoxide and a series of substituted thiophesoecides with 2-methyl, 2,6-dimethyl, 4-methyl, 3-nitro and unsubstituted benzyl chloride have been measured. The pKa values of nine substituted thiophenols were determined in methanol. The magnitude of the London interaction energy in the transition state for 2,6-dimethylbenzyl chloride was found to be approximately twice that of the observed value for 2-methylbenzyl chloride. This suggests that the effect of London interaction may be additive. The chemical shifts of the CH2-groups of benzyl chloride, 2-methylbenzyl chloride and 2,6-dimethylbenzyl chloride measured in various mixed solvents indicate that ground-state solvation of the reaction center is similar for the first two chlorides. The transition-state activity coefficients for reactions of 2-methyl, 2,6-dimethyl and unsubstituted benzyl chloride with methoxide were obtained from treatment of the rate constants measured in MeOH and DMF. The results indicate that differences in transition-state solvation are small. Bunnett's adjusted rate ratio for the evaluation of London energy between the ortho substituant and the approaching nucleophile at the transition-state remains constant in various solvents and is discussed in terms of the ground state and the transition-state solvation of reactions. The modified reaction constants, PN, are estimated by plotting the logarithms of the rate constants for substituted benzyl chlorides against the corresponding values for unsubstituted chloride. The similarity of the reaction constants between o-methylbenzyl chloride and p-methylbenzyl chloride can be attributed to the polar influence which predominates over the steric effect for the ortho substituent. However, systematic deviations for the nucleophiles of m-nitrothiophenoxide and 3,5-dinitrothiophenoxide were observed in the plots mentioned above. The reactivities for these two nucleophiles increase as the electron-donating ability of the substituent of benzyl chloride increases. The kinetic parameters were determined. Charge-transfer complex stabilization at the transition-state is proposed for the accelerating effect of m-nitro and 3,5-dinitrothiophenoxide with benzyl chlorides. A linear relation between substituent effects and the degradation of the molecular ion (RSSR)·+ for five substituted aryl disulfides has been found.
RCSLenS: Testing gravitational physics through the cross-correlation of weak lensing and large-scale structure
Creators: name: Blake, Chris
name: Joudaki, Shahab
name: Heymans, Catherine
name: Choi, Ami
name: Erben, Thomas
name: Harnois-Deraps, Joachim
name: Hildebrandt, Hendrik
name: Joachimi, Benjamin
name: Nakajima, Reiko
name: van Waerbeke, Ludovic
name: Viola, Massimo
Publisher: name: Swinburne
Year: 2024

description: The unknown nature of ‘dark energy’ motivates continued cosmological tests of large-scale gravitational physics. We present a new consistency check based on the relative amplitude of non-relativistic galaxy peculiar motions, measured via redshift-space distortion, and the relativistic deflection of light by those same galaxies traced by galaxy-galaxy lensing. We take advantage of the latest generation of deep, overlapping imaging and spectroscopic data sets, combining the Red Cluster Sequence Lensing Survey, the Canada-France-Hawaii Telescope Lensing Survey, the WiggleZ Dark Energy Survey and the Baryon Oscillation Spectroscopic Survey. We quantify the results using the ‘gravitational slip’ statistic EG, which we estimate as 0.48 ± 0.10 at z = 0.32 and 0.30 ± 0.07 at z = 0.57, the latter constituting the highest redshift at which this quantity has been determined. These measurements are consistent with the predictions of General Relativity, for a perturbed Friedmann-Robertson-Walker metric in a Universe dominated by a cosmological constant, which are EG = 0.41 and 0.36 at these respective redshifts. The combination of redshift-space distortion and gravitational lensing data from current and future galaxy surveys will offer increasingly stringent tests of fundamental cosmology.
title: Devitalisation of human cartilage by high hydrostatic pressure treatment
title: Subsequent cultivation of chondrocytes and mesenchymal stem cells on the devitalised tissue
titleType: Subtitle
Creators: name: Hiemer, B.
name: Genz, B.
name: Jonitz-Heincke, A.
name: Pasold, J.
name: Wree, A.
name: Dommerich, S.
name: Bader, R.
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2016
Subjects: subject: Molecular medicine
subject: Regeneration
subject: Stem-cell differentiation
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit

description: The regeneration of cartilage lesions still represents a major challenge. Cartilage has a tissue-specific architecture, complicating recreation by synthetic biomaterials. A novel approach for reconstruction is the use of devitalised cartilage. Treatment with high hydrostatic pressure (HHP) achieves devitalisation while biomechanical properties are remained. Therefore, in the present study, cartilage was devitalised using HHP treatment and the potential for revitalisation with chondrocytes and mesenchymal stem cells (MSCs) was investigated. The devitalisation of cartilage was performed by application of 480 MPa over 10 minutes. Effective cellular inactivation was demonstrated by the trypan blue exclusion test and DNA quantification. Histology and electron microscopy examinations showed undamaged cartilage structure after HHP treatment. For revitalisation chondrocytes and MSCs were cultured on devitalised cartilage without supplementation of chondrogenic growth factors. Both chondrocytes and MSCs significantly increased expression of cartilage- specific genes. ECM stainings showed neocartilage-like structure with positive AZAN staining as well as collagen type II and aggrecan deposition after three weeks of cultivation. Our results showed that HHP treatment caused devitalisation of cartilage tissue. ECM proteins were not influenced, thus, providing a scaffold for chondrogenic differentiation of MSCs and chondrocytes. Therefore, using HHP-treated tissue might be a promising approach for cartilage repair.
Longitudinal relationship between English language proficiency and academic achievement for English learners
Creators: name: Vo, Yen Thi Hoang
Publisher: name: University of Iowa
Year: 2026
Subjects: academic achievement and growth
ELA
English language proficiency
English learners
math
multivariate clustered longitudinal model

description: This study investigated the longitudinal relationship between English Language Proficiency (ELP) and the developmental trajectories in math and English Language Arts (ELA) among English Learner (EL) students from Grades 6 to 11. The study also aimed to investigate whether the developmental trajectories of ELP, ELA, and math vary based on students’ background characteristics such as gender, race/ethnicity, and participation in Individualized Education Programs (IEP), Free or Reduced-Price Lunch (FRL), and EL programs. A multivariate clustered longitudinal model was used to achieve the two research objectives. The findings showed that EL students with a higher initial ELP tended to perform better in math and ELA. EL students who improved more in ELP tended to have a higher rate of growth in math and ELA. The effects of background characteristics on growth trajectories varied depending on subject areas. After controlling for other background characteristics, female EL students showed greater improvement in ELP and ELA while male EL students started higher in initial math and grew at a similar rate as their female counterparts who attended the same school. There were some racial/ethnic differences in growth trajectories in math and ELP. Schools with a higher percentage of Black EL students tended to have lower initial ELA scores. EL students who were sometimes enrolled in IEP started with a lower ELP than those who were never enrolled in IEP. EL students who were consistently enrolled in IEP improved less in ELP than those who were sometimes enrolled in IEP. Students who remained in the EL programs from Grades 6 to 11 showed a lower initial performance and a lower rate of growth in ELP, ELA, and math compared to students who exited the EL programs at some point. A negative association between the composition of long-term EL student in a school and the school improvement in ELP was also observed. This study contributes valuable insights into the intricate dynamics among ELP, ELA, math, and demographic characteristics among EL students in secondary educational settings.
Galaxy And Mass Assembly (GAMA): the stellar mass budget by galaxy type
Creators: name: Moffett, Amanda J.
name: Ingarfield, Stephen A.
name: Driver, Simon P.
name: Robotham, Aaron S. G.
name: Kelvin, Lee S.
name: Lange, Rebecca
name: Meštrić, Uroš
name: Alpaslan, Mehmet
name: Baldry, Ivan K.
name: Bland-Hawthorn, Joss
name: Brough, Sarah
name: Cluver, Michelle
name: Davies, Luke J. M.
name: Holwerda, Benne W.
name: Hopkins, Andrew M.
name: Kafle, Prajwal R.
name: Kennedy, Rebecca
name: Norberg, Peder
name: Taylor, Edward
Publisher: name: Swinburne
Year: 2024

description: We report an expanded sample of visual morphological classifications from the Galaxy and Mass Assembly survey phase two, which now includes 7556 objects (previously 3727 in phase one). We define a local (z < 0.06) sample and classify galaxies into E, S0-Sa, SB0-SBa, Sab-Scd, SBab-SBcd, Sd-Irr, and `little blue spheroid' types. Using these updated classifications, we derive stellar mass function fits to individual galaxy populations divided both by morphological class and more general spheroid- or disc-dominated categories with a lower mass limit of log(M*/M⊙) = 8 (one dex below earlier morphological mass function determinations). We find that all individual morphological classes and the combined spheroid-/bulge-dominated classes are well described by single Schechter stellar mass function forms. We find that the total stellar mass densities for individual galaxy populations and for the entire galaxy population are bounded within our stellar mass limits and derive an estimated total stellar mass density of ρ* = 2.5 × 108 M⊙ Mpc-3 h0.7, which corresponds to an approximately 4 per cent fraction of baryons found in stars. The mass contributions to this total stellar mass density by galaxies that are dominated by spheroidal components (E and S0-Sa classes) and by disc components (Sab-Scd and Sd-Irr classes) are approximately 70 and 30 per cent, respectively.
Organizational decision-making regarding the Legionnaire’s disease outbreak during the Flint water crisis
Creators: name: Hoemann, Carolyn
Publisher: name: University of Iowa
Year: 2022
Subjects: Flint Water Crisis
legionnaires disease
racialized decoupling
street level bureaucrat
public abstract

description: The Flint Water Crisis caused the contamination of Flint, Michigan’s water with lead, legionella, e. coli, total coliform bacteria, and total trihalomethanes. The presence of the waterborne pathogen legionella caused more than 90 people to become sick with Legionnaires Disease from 2014-2016. Official state analysis indicated that 12 people died from the outbreak of this severe pneumatic illness. Qualitative analysis was conducted of public records to analyze organizational decision-making patterns during the management of the Legionnaires Disease outbreak during the Flint Water Crisis. The dataset contained government emails that were released by Michigan Governor Rick Snyder’s administration. Thematic analysis of the email data revealed policy implementation strategies used by the Genesee County Health Department, the Michigan Health and Human Services Department, and the Michigan Department of Environmental Quality. The management mechanisms used by the departments may demonstrate racialized decoupling, a process where organizations decouple their formal policies and goals from their actions for discriminatory reasons. The data in this study suggest that the departments decoupled their mandates to protect public health from their actions that reproduced racial health disparities by hesitating to intervene during the outbreak.
Free running 6 degree of freedom CFD for high-speed small craft
Creators: name: Park, Sungtek
Publisher: name: University of Iowa
Year: 2022
Subjects: 6DoF motion
CFD
Free-running
High-speed small craft
Maneuvering
Ship hydrodynamics
Ocean engineering
public abstract

description: CFD simulations of a high-speed small craft, the Generic Prismatic Planing Hull (GPPH), are performed with 6DoF motions including 2DoF captive motion, free running self-propulsion, turning circles in calm water and waves, acceleration, and avoidance line tests. Both a single-phase flow solver and multi-phase flow solver are used for the calculations including variable fidelity modeling (VFM) and high fidelity (HF) methods. In the VFM simulations, the propeller and gear case force models are used to replace the actual geometry propeller used for the HF calculations. The hull form and propulsor of the GPPH are scaled to match a deep V fishing boat (DVFB). The on water experimental data of the DVFB was collected by Mercury Marine (MM) for self-propulsion, which is used for qualitative validation.
description: Both the captive and 3DoF self-propulsion simulations show that the trim angle and heave decrease with the gear case. The simulation with the gear case also shows a larger resistance than the VFM due to the differences between the VFM and the gear case towing tank experiment. For the self-propulsion simulations, the 6DoF simulations show reasonable force and moment balances for all of directions including surge, sway, heave, roll, pitch, and yaw. The 3DoF simulations, however, only show the balances with surge, heave, and pitch. The tilt angle effect study shows that the resistance decreases, and the pitch angle increases with tilt angles for the HF simulations, which agrees with the experiment. The simulations of turning circle maneuvering show reasonable force-moment balance in all degrees of motion, and the VFM results show reasonable agreement with the HF for stable turnings but show spin-out phenomenon for the steering angle of 25 deg. When the unstable turning spin-out occurs, the yaw rate and drift angle are highly increased and the ship-speed is significantly reduced. The simulations of maneuvering in waves show that the yaw rate and drift angle are highly increased, and the speed is significantly reduced, which is similar to the spin-out case in calm water. The avoidance line tests show the results satisfies the safety criteria and a large centrifugal acceleration over 2.2g is predicted during the 90deg quick turns, which is dangerous as it may lead to ejection of the crew from the vessel.
description: The present work is the first known CFD study for the free running of high-speed small craft with 6DoF motions and is exploratory in nature. The accuracy and performance of the VFM methods are evaluated with the issues identified. Other issues for the simulations of the high-speed small craft are also discussed such as the optimum grid sizes, submerged depth of the gear case, and instabilities. All of these can be provided as recommendations for future research improvements.
Comparative analysis of SN 2012dn optical spectra: days −14 to +114
Creators: name: Parrent, J. T.
name: Howell, D. A.
name: Fesen, R. A.
name: Parker, S.
name: Bianco, F. B.
name: Dilday, B.
name: Sand, D.
name: Valenti, S.
name: Vinkó, J.
name: Berlind, P.
name: Challis, P.
name: Milisavljevic, D.
name: Sanders, N.
name: Marion, G. H.
name: Wheeler, J. C.
name: Brown, P.
name: Calkins, M. L.
name: Friesen, B.
name: Kirshner, R.
name: Pritchard, Tyler
name: Quimby, R.
name: Roming, P.
Publisher: name: Swinburne
Year: 2024

description: SN 2012dn is a super-Chandrasekhar mass candidate in a purportedly normal spiral (SAcd) galaxy, and poses a challenge for theories of type Ia supernova diversity.Herewe utilize the fast and highly parametrized spectrum synthesis tool, SYNAPPS, to estimate relative expansion velocities of species inferred from optical spectra obtained with six facilities. As with previous studies of normal SN Ia, we find that both unburned carbon and intermediate-mass elements are spatially coincident within the ejecta near and below 14 000 km s⁻¹. Although the upper limit on SN 2012dn's peak luminosity is comparable to some of the most luminous normal SN Ia, we find a progenitor mass exceeding ~1.6 M⊙ is not strongly favoured by leading merger models since these models do not accurately predict spectroscopic observations of SN 2012dn and more normal events. In addition, a comparison of light curves and host-galaxy masses for a sample of literature and Palomar Transient Factory SN Ia reveals a diverse distribution of SN Ia subtypes where carbon-rich material remains unburned in some instances. Such events include SN 1991T, 1997br, and 1999aa where trace signatures of C III at optical wavelengths are presumably detected.
Reactions of carbanions stabilised by adjacent nitrogen functions.
Creators: name: Postescu, Ion Dan.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1972
Subjects: subject: Chemistry, Organic.

description: The alpha-functionalisation via carbanion intermediates was effected on a series of nitrosamines. A number of alkylations were found to proceed efficiently in the case of dibenzylnitrosamine. Moderate yields were obtained in the methylation of 1-nitroso-4-phenylpiperazine. The carboxylation of this compound proved to proceed in higher yield than the alkylation. The carboxylation of 1-nitroso-pyrrolidine and 1-nitrosopiperidine was achieved in lower yield (27-28%). Optimum conditions for denitrosation were obtained by bubbling hydrogen chloride gas through the benzent: solution of the nitrosamine. The yields of the resultant amine hydrochlorides were consistently 80-90%. It was found that an amido group (i.e. in N, N-dibenzylbenzamide) like the nitroso group provides an activating influence for the lithiation alpha to nitrogen.
Routing algorithms for ad hoc wireless networks with a realistic physical layer
Creators: name: Kuruvila, Johnson
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2006
Subjects: subject: Engineering, Electronics and Electrical.

description: The design and evaluation of existing routing protocols for ad hoc wireless networks normally assume an ideal physical layer model, where the message is received if and only if two nodes are within the transmission range. Routing protocols designed for this model show poor performance in simulators implementing more realistic models. In this thesis, we introduce a model that simplifies the realistic log-normal shadowing model by approximating the probability of packet reception based on distance between nodes. We then design several localized, position based routing algorithms with and without acknowledgements, with fixed message sizes. An appropriate MAC protocol for acknowledging the message is described. Localized position and acknowledgement based protocols are based on calculating ideal hop count, and optimizing expected progress. Improved, iterative versions of these protocols are also presented. These algorithms strive to optimize the expected hop count (EHC) measure in delivering the message from the source to the destination, where EHC takes into account all acknowledgements and retransmissions. We also propose several localized non acknowledgement-based algorithms. These protocols aim to maximize the probability of delivery of a packet from the source node to the destination node. Our, performance evaluation shows that newly proposed localized protocols are competitive with global shortest weighted path based protocols, and superior to threshold based localized protocols that were also proposed in this thesis. We also studied the impact of imprecise location information on the performance of the suggested protocols.
Erratum: the SAMI Galaxy Survey: can we trust aperture corrections to predict star formation?
Creators: name: Richards, S. N.
name: Bryant, J. J.
name: Croom, S. M.
name: Hopkins, A. M.
name: Schaefer, A. L.
name: Bland-Hawthorn, J.
name: Allen, J. T.
name: Brough, S.
name: Cecil, G.
name: Cortese, Luca
name: Fogarty, L. M. R.
name: Gunawardhana, M. L. P.
name: Goodwin, M.
name: Green, A. W.
name: Ho, I.-T.
name: Kewley, L. J.
name: Konstantopoulos, I. S.
name: Lawrence, J. S.
name: Lorente, N. P. F.
name: Medling, A. M.
name: Owers, M. S.
name: Sharp, R.
name: Sweet, Sarah
name: Taylor, Edward
Publisher: name: Swinburne
Year: 2024
Subjects: classificationCode: 510103
subject: Cosmology and extragalactic astronomy

description: The paper 'The SAMI Galaxy Survey: can we trust aperture corrections to predict star formation?' was published in MNRAS 455, 2826 (2016). A mischaracterization of the data presented in Figs 10 and 11 of the original paper affects our conclusion on the biases found in the Brinchmann et al. (2004, hereafter B04) aperture correction. Conclusions regarding the Hopkins et al. (2003, hereafter H03) aperture correction remain unaffected.
title: The visual, the verbal, and the moral
title: Ekphrasis of beauty in the ancient Greek novels
titleType: Subtitle
Creators: name: Hales-Brittain, Sara L.
Publisher: name: University of Iowa
Year: 2022
Subjects: Achilles Tatius
Ancient Greek novels
Chariton
ekphrasis
Heliodorus
Longus
public abstract

description: This dissertation uses close reading to examine the ekphraseis of beautiful women in the five “ideal” ancient Greek novels, the ways in which these ekphraseis manifest the ancient rhetorical topos of competition between the visual and verbal arts, and the lessons in moral viewership which these passages convey. I argue that the novels’ ekphraseis of beautiful women and the scenes of love at first sight that often accompany them reveal the qualities which one must possess to view beautiful women appropriately. These novels encourage readers to view women as would a traditional pepaideumenos, in a way which brings about social as well as individual goods.
description: The pepaideumenos, as I will show, lives out the philosophical middle way described by Socrates in Plato’s Phaedrus. The complications of problematic protagonists and virtuous antagonists, I argue, force the reader to actively engage with questions of ethics and social morality, rather than passively absorb the moral message of the novels. Through descriptions of and reactions to beautiful women in the narratives, the novelists convey that the παιδεία and σωφροσύνη necessary to read and comprehend the novels fully are also necessary to live virtuously and to have a successful life out in the world.
description: With particular attention to the passages in which (reactions to) visual or verbal beauty play(s) a large role, Chapter 2 considers the protagonists’ love-at-first-sight meeting. Chapter 3 examines comparisons of the heroines to works of visual art. Chapter 4 explores the antagonists’ viewing of and reaction to the heroines. I also consider key vocabulary choices made by the novel authors in these passages, their relation to the novel as a whole, and the broader rhetorical context of verbalizing a visual experience. My final chapter explores the ramifications of a metaliterary interpretation in which viewing the heroines signifies reading the novels themselves.
Changes in Multiyear Landfast Sea Ice in the Northern Canadian Arctic Archipelago
Creators: name: Pope, Sierra Grace
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2010
Subjects: subject: Physical Geography.
subject: Climate Change.
subject: Physical Oceanography.

description: For most of the 20th century, multiyear landfast sea ice (MLSI) existed in semi-permanent plugs across Nansen Sound and Sverdrup Channel and formed an incipient ice shelf in Yelverton Bay, Ellesmere Island in the northern CAA. Both plugs broke in 1962 and 1998, and several breakups within the last decade indicate that the plugs are becoming temporary seasonal features. The history of the plugs is reviewed using Canadian Ice Service ice charts, satellite imagery and a literature review. The weather systems associated with plug breakup events are related to a sequence of synoptic patterns, with most breakups occurring when low pressure centers over the Asian side of the Arctic Ocean and a warm pressure ridge develops over the QEI, creating warm temperatures, clear skies, and frequent wind reversals. The 2005 simultaneous breakup of the plugs was accompanied by the removal of 690 km2 of 55-60 year old MLSI from Yelverton Bay. Ground Penetrating Radar (GPR) and ice cores taken in June 2009 provide the first detailed assessment of the remaining MLSI in Yelverton Inlet, which in turn provides ground-truthing of satellite scenes and air photos used to chart historical changes in the MLSI. The last of the Yelverton Bay MLSI was removed in August 2010. The removal of these MLSI features in recent years aligns with the larger trend of reductions in age and thickness of sea ice in the Canadian Arctic Archipelago.
The SAMI Galaxy Survey: Extraplanar gas, galactic winds and their association with star formation history
Creators: name: Ho, I.-T.
name: Medling, Anne M.
name: Bland-Hawthorn, Joss
name: Groves, Brent
name: Kewley, Lisa J.
name: Kobayashi, Chiaki
name: Dopita, Michael A.
name: Leslie, Sarah K.
name: Sharp, Rob
name: Allen, James T.
name: Bourne, Nathan
name: Bryant, Julia J.
name: Cortese, Luca
name: Croom, Scott M.
name: Dunne, Loretta
name: Fogarty, L. M. R.
name: Goodwin, Michael
name: Green, Andy W.
name: Konstantopoulos, Iraklis S.
name: Lawrence, Jon S.
name: Lorente, Nuria P. F.
name: Owers, Matt S.
name: Richards, Samuel
name: Sweet, Sarah
name: Tescari, Edoardo
name: Valiante, Elisabetta
Publisher: name: Swinburne
Year: 2024
Subjects: classificationCode: 510103
subject: Cosmology and extragalactic astronomy

description: We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey to understand the link between properties of the extraplanar gas and their host galaxies. The kinematics properties of the extraplanar gas, including velocity asymmetries and increased dispersion, are used to differentiate galaxies hosting large-scale galactic winds from those dominated by the extended diffuse ionized gas. We find rather that a spectrum of diffuse gas-dominated to wind-dominated galaxies exist. The wind-dominated galaxies span a wide range of star formation rates (SFRs; -1 a parts per thousand(2) log (SFR/M-aS (TM) yr(-1)) a parts per thousand(2) 0.5) across the whole stellar mass range of the sample (8.5 a parts per thousand(2) log (M-*/M-aS (TM)) a parts per thousand(2) 11). The wind galaxies also span a wide range in SFR surface densities (10(- 3)-10(- 1.5) M-aS (TM) yr(- 1) kpc(- 2)) that is much lower than the canonical threshold of 0.1 M-aS (TM) yr(- 1) kpc(- 2). The wind galaxies on average have higher SFR surface densities and higher H delta(A) values than those without strong wind signatures. The enhanced H delta(A) indicates that bursts of star formation in the recent past are necessary for driving large-scale galactic winds. We demonstrate with Sloan Digital Sky Survey data that galaxies with high SFR surface density have experienced bursts of star formation in the recent past. Our results imply that the galactic winds revealed in our study are indeed driven by bursts of star formation, and thus probing star formation in the time domain is crucial for finding and understanding galactic winds.
hPSCreg - the human pluripotent stem cell registry
Creators: name: Seltmann, Stefanie
name: Lekschas, Fritz
name: Müller, Robert
name: Stachelscheid, Harald
name: Bittner, Marie-Sophie
name: Zhang, Weiping
name: Kidane, Luam
name: Seriola, Anna
name: Veiga, Anna
name: Stacey, Glyn
name: Kurtz, Andreas
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2016
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit

description: The human pluripotent stem cell registry (hPSCreg), accessible at http://hpscreg.eu, is a public registry and data portal for human embryonic and induced pluripotent stem cell lines (hESC and hiPSC). Since their first isolation the number of hESC lines has steadily increased to over 3000 and new iPSC lines are generated in a rapidly growing number of laboratories as a result of their potentially broad applicability in biomedicine and drug testing. Many of these lines are deposited in stem cell banks, which are globally established to store tens of thousands of lines from healthy and diseased donors. The Registry provides comprehensive and standardized biological and legal information as well as tools to search and compare information from multiple hPSC sources and hence addresses a translational research need. To facilitate unambiguous identification over different resources, hPSCreg automatically creates a unique standardized name for each cell line registered. In addition to biological information, hPSCreg stores extensive data about ethical standards regarding cell sourcing and conditions for application and privacy protection. hPSCreg is the first global registry that holds both, manually validated scientific and ethical information on hPSC lines, and provides access by means of a user-friendly, mobile-ready web application.
Relational theory and the female body: A critical analysis of intersecting themes in feminist studies in religion and the psychology of women.
Creators: name: Driscoll, Ellen M.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1999
Subjects: subject: Religion, General.

description: This thesis illustrates how various theorists in religious studies and in psychology are advancing feminist scholarship in similar directions with respect to relational theory and theories of the female body. This analysis explicates areas of theoretical convergence within and between these disciplines, including, their methodological commitments; their distinctive contributions to relational theory; their analysis of the historical legacy of mind/body dualism; their interrogation of the processes by which the female body is regulated and contained in religion and contemporary culture; and their understanding of the psychological and religious effects produced by current body/self disciplinary practices. The dissertation concludes by suggesting that each discipline can provide correctives to, and enhance the other if dialogue between them was encouraged.
title: Using natural products as means of methodological discovery
title: enol ester epoxides and their diverse reactivity leading to two advanced fragments of bastimolide A and B
titleType: Subtitle
Creators: name: Hackbarth, Jacob
Publisher: name: University of Iowa
Year: 2023
Subjects: public abstract

description: In the pursuit of applying our group’s iterative strategy for establishing unambiguously defined stereocenters in the synthesis of bastimolides A and B, two natural products that show potent antimalarial activity to strains of malaria resistant to current treatments, we were able to demonstrate the synthetic utility of enol ester epoxides as precursors to enantiopure α-silyloxyaldehydes. Variations to these conditions make these precursors suitable for the synthesis of both 1,5-diols and 1,5,7-triols. When enantiopure 1,5-polyol aliphatic precursor enol ester epoxides, prepared from t-butylacetylene and 1-octyne, are subjected to silyl-cation ring-opening they readily collapse to the α-silyloxyaldehyde in high yield. 1,5,7-Triol precursor enol ester epoxides (protected ß-hydroxy enol ester epoxides) can be converted to the O-protected α-halo-benzoyloxy-ß-hydrin in one pot over two steps, which collapses down to the desired α-silyloxyaldehyde after the ester moiety is cleaved through basic methanol hydrolysis.
Moving patterns of Iowa dentists who were in private practice in the year 2000
Creators: name: Jin, ChangHee
Publisher: name: University of Iowa
Year: 2024
Subjects: subject: access to care
subject: moving pattern
subject: practice location
subject: rural
subject: workforce
subject: Health sciences
subject: FOS: Health sciences
subject: public abstract
subject: Dentistry
subject: FOS: Clinical medicine

description: OBJECTIVES: This study examined dentists’ moving patterns in Iowa from 2000 to 2019 to identify potential trends in movement between urban and rural areas.
description: METHODS: The source of data was the Iowa Dentist Tracking System (IDTS). All active dentists in Iowa in 2000 (n=1424) were used as a baseline. The final sample (n=616) included dentists who remained in private practice in Iowa during the study period. Movers were identified based on a change in the year 2000 street address as of 2019. Urbanicity of practice locations was measured at the county level using the 2013 Rural-Urban Continuum Codes (RUCC). Multivariable logistic regression was used to identify characteristics associated with relocation and subsequent change in urbanicity over the study period.
description: RESULTS: Only 22.2% of the final sample moved during 2000-2019. Among dentists who moved (n=137), 74.5% moved with no change in urbanicity of their practice locations, 13.9% moved to more urban counties, and 11.7% moved to more rural counties. Eighty percent of those movers with no change in urbanicity relocated from one metro (RUCCs 1-3) location to another metro location. Younger (p<.001), and part-time dentists (p=.02) were more likely to move than were their counterparts.
description: CONCLUSIONS: Iowa private practice dentists who moved during 2000-2019 tended to be younger and work part-time. Given that only two-tenths of the final sample of dentists moved and nearly three-quarters of those movers remained within the same urbanicity, the initial practice location may play an important role in geographic distribution of dentists across the state.
Khovanov homotopy and its interaction with other link homology theories
Creators: name: Paul, Pravakar
Publisher: name: University of Iowa
Year: 2023
Subjects: Khovanov homology
Khovanov homotopy type
Link homology theory
Quantum topology
Spectral sequence
public abstract

description: This thesis consists of three parts. The first part investigates the uniqueness of a construction by Sarkar-Seed-Szábo. They defined a combination theory that unifies two different link homology theories: Bar-Natan's purturbation and Szábo's geometric theory by introducing a collection of endomorphisms $\{h_i \}_{i=2}^{\infty}$. Their construction satisfies certain natural coherent properties. We show that the properties also led to the uniqueness of the collection of endomorphisms. In the second part we show an incompatibility between Szábo's geometric complex and (even) Khovanov homology. This is achieved by looking at the action of $sq_{1}$ on the geometric spectral sequence.
description: In the third part we construct an example of link homology theory using the spectrification of Lawson-Lipshitz-Sarkar. We show that for quasi-alternating links the associated Atiayh-Hirzebruch spectral seqeuence dies at the $E_2$ page.
Association of Ideal Cardiovascular Health With Vascular Brain Injury and Incident Dementia
Creators: name: Pase, Matthew
name: Beiser, Alexa
name: Enserro, Danielle
name: Xanthakis, Vanessa
name: Aparicio, Hugo
name: Satizabal, Claudia L.
name: Himali, Jayandra J.
name: Kase, Carlos S.
name: Vasan, Ramachandran S.
name: DeCarli, Charles
name: Seshadri, Sudha
Publisher: name: Swinburne
Year: 2024

description: Background and Purpose - The American Heart Association developed the ideal cardiovascular health (CVH) index as a simple tool to promote CVH; yet, its association with brain atrophy and dementia remains unexamined. Methods - Our aim was to investigate the prospective association of ideal CVH with vascular brain injury, including the 10-year risks of incident stroke and dementia, as well as cognitive decline and brain atrophy on magnetic resonance imaging, measured for ≈7 years. We studied 2750 stroke- and dementia-free Framingham Heart Study Offspring cohort participants (mean age, 62±9 years; 45% men). Ideal CVH was quantified on a 7-point scale with 1 point awarded for each of the following: nonsmoking status, ideal body mass index, regular physical activity, healthy diet, as well as optimum blood pressure, cholesterol, and fasting blood glucose. Both recent (baseline) and remote (6.9 years earlier) ideal CVH scores were examined. Results—Recent ideal CVH was associated with stroke (hazard ratio, 0.80; 95% confidence interval, 0.67–0.95), vascular dementia (hazard ratio, 0.49; 95% confidence interval, 0.30–0.81), frontal brain atrophy (P=0.003), and cognitive decline on tasks measuring visual memory and reasoning (P<0.05). In addition to predicting stroke, vascular dementia, whole-brain atrophy, and cognitive decline, remote ideal CVH was associated with the incidence of all-cause dementia (hazard ratio, 0.80; 95% confidence interval, 0.67–0.97) and Alzheimer disease (hazard ratio, 0.79; 95% confidence interval, 0.64–0.98).
Conclusions—Adherence to the American Heart Association’s ideal CVH factors and behaviors, particularly in midlife, may protect against cerebrovascular disease and dementia.
Non-linear finite element analysis and parametric investigation of low-rise reinforced concrete shear walls.
Creators: name: Navidpour, Nasir.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2000
Subjects: subject: Engineering, Civil.

description: A parametric study was carried out on 18 reinforced concrete shear walls to investigate the significance of design parameters on seismic response. The parameters included boundary elements and their reinforcement characteristics, web reinforcement ratios, concrete strength, steel yield strength, and axial load. The investigation was conducted using finite element analyses. Computer program ADINA was used to perform nonlinear analysis of concrete shear walls under axial load and incrementally increasing lateral forces. Material nonlinearities, including those of concrete, were modeled using ADINA material models. Four-node isoparametric plane stress elements were used to model concrete. Steel elements were modeled using two-node nonlinear truss elements. The applicability of the program and the accuracy of finite element models were first validated. This was done by comparing the results of six different shear walls with those obtained experimentally. The walls included three specimens tested by Maier at the Swiss Federal Institute of Technology in Zurich, Switzerland and three shear walls tested by Lefas et al. at Imperial College of Science and Technology, London, England. The analytical and experimental results showed very good agreement. The results of the parametric investigation indicate that the presence of boundary elements enhanced strength and deformability of shear walls significantly. Wall aspect ratio was also found to be an important parameter dictating the mode of behavior. The longitudinal reinforcement ratio in the boundary elements was found to be a good source of energy dissipation and had much greater influence on ultimate load capacity than the web reinforcement. When confinement of concrete was considered, both the ultimate load capacity and ductility of shear walls improved. The effects of increased axial compression and increased reinforcement yield level were to increase strength but reduce ductility.
title: Role of tick prevention in the transmission of tick-borne diseases among people and dogs
title: assessing the efficacy of Sarolaner in reducing tick-borne disease exposure
titleType: Subtitle
Creators: name: Baccam, Tyler
Publisher: name: University of Iowa
Year: 2022
Subjects: public abstract

description: Tick-borne diseases (TBD) are emerging and continue to affect humans and animals. Diseases such as Lyme disease, ehrlichiosis, and anaplasmosis are the most prevalent emerging TBDs in the United States. The most effective One Health approach in preventing tick-borne diseases is to prevent ticks from coming in contact or embedding on humans and animals. Limiting the time ticks stay attached may be related to the ability of the tick to transmit a TBD. Sarolaner is a recently developed type of acaricide for dogs that provides month-long protection against tick bites and kills the tick upon embedding. A 1.5 year randomized-control trial was conducted using two groups of hunting dog populations. In each group of dogs, half were randomized into a placebo and sarolaner treatment group. Each month during the duration of the study, dogs were given placebo or sarolaner. Blood samples were taken every 3 months and were used with a 4Dx SNAP Test to report serological exposure to Borrelia burgdorferi, Ehrlichia spp., and Anaplasma spp. A survival analysis was conducted to estimate the reduced risk of exposure to TBD between treatment and placebo groups. The hazard ratio for this analysis was 0.3935 (95% CI:0.1436-1.078, p-value=0.07). Though this result was not statistically significant, it is suggestive of sarolaner having a protective effect. More research is needed to better understand the direct relationship between tick-bite prevention strategies and TBD transmission.
Minor injury crashes : Prevalence of driver-related risk factors and outcome
Creators: name: Brubacher, Jeffrey
name: Chan, Herbert
name: Purssell, Elizabeth
name: Tuyp, Benjamin J.
name: Ting, Daniel
name: Mehrnoush, Vahid
Publisher: name: Elsevier
Year: 2022

description: Objectives: The majority of crashes cause “minor” injuries (i.e. treated and released from emergency department -ED). Minor injury crashes are poorly studied. This study aims to determine the prevalence of driver-related risk factors and subsequent outcome in drivers involved in minor crashes. Methods: We interviewed a convenience sample of injured drivers, aged over 17 years, who were treated and released from ED. Follow-up interviews were conducted 6 months after the crash. Results: We approached 123 injured drivers; baseline interviews were completed in 69, and followup interviews in 45. Prior to the index crash, 1.4% of drivers drank alcohol, 1.4% used illicit drugs and 7.2% used sedating prescription medications. Nine drivers (13%) were distracted. In this sample, 5.8% met criteria for being aggressive drivers, 7.2% were risky drivers, and 11.6% drove while experiencing negative emotions. At 6 month follow-up, many drivers were still having health problems, 53.3% were not fully recovered, 46.7% had not returned to usual activities, and 28.9% were off work. Of the 42 participants who resumed driving, 16.7% had a near miss and 4.8% had another crash. Nine (21.4%) reported drinking and driving, and 9.5% reported driving after cannabis use. Cell phone use (16.7%) and use of other electronics while driving (23.8%) were also common. Conclusions: Driver-related risk factors are common in drivers involved in minor injury crashes and drivers persist in taking risks after being involved in a crash. Despite their name, minor injury crashes are often associated with slow recovery and prolonged absenteeism from work.
Paradoxical augmented relapse in alcohol-dependent rats during deep-brain stimulation in the nucleus accumbens
Creators: name: Hadar, R.
name: Vengeliene, V.
name: Hlusicke, E. Barroeta
name: Canals, S.
name: Noori, H. R.
name: Wieske, F.
name: Rummel, J.
name: Harnack, D.
name: Heinz, A.
name: Spanagel, R.
name: Winter, C.
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2016
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit

description: Case reports indicate that deep-brain stimulation in the nucleus accumbens may be beneficial to alcohol-dependent patients. The lack of clinical trials and our limited knowledge of deep-brain stimulation call for translational experiments to validate these reports. To mimic the human situation, we used a chronic-continuous brain-stimulation paradigm targeting the nucleus accumbens and other brain sites in alcohol-dependent rats. To determine the network effects of deep-brain stimulation in alcohol-dependent rats, we combined electrical stimulation of the nucleus accumbens with functional magnetic resonance imaging (fMRI), and studied neurotransmitter levels in nucleus accumbens-stimulated versus sham-stimulated rats. Surprisingly, we report here that electrical stimulation of the nucleus accumbens led to augmented relapse behavior in alcohol-dependent rats. Our associated fMRI data revealed some activated areas, including the medial prefrontal cortex and caudate putamen. However, when we applied stimulation to these areas, relapse behavior was not affected, confirming that the nucleus accumbens is critical for generating this paradoxical effect. Neurochemical analysis of the major activated brain sites of the network revealed that the effect of stimulation may depend on accumbal dopamine levels. This was supported by the finding that brain- stimulation-treated rats exhibited augmented alcohol-induced dopamine release compared with sham-stimulated animals. Our data suggest that deep-brain stimulation in the nucleus accumbens enhances alcohol-liking probably via augmented dopamine release and can thereby promote relapse.