cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
What Causes Wrong Sentiment Classifications of Game Reviews?
Creators: Viggiato, M.
Lin, D.
Hindle, Abram
Bezemer, C.P.
Publisher: name: University of Alberta Library
Year: 2021

Sentiment analysis is a popular technique to identify the sentiment of a piece of text. Several different domains have been targeted by sentiment analysis research, such as Twitter, movie reviews, and mobile app reviews. Although several techniques have been proposed, the performance of current sentiment analysis techniques is still far from acceptable, mainly when applied in domains on which they were not trained. In addition, the causes of wrong classifications are not clear. In this article, we study how sentiment analysis performs on game reviews. We first report the results of a large-scale empirical study on the performance of widely used sentiment classifiers on game reviews. Then, we investigate the root causes for the wrong classifications and quantify the impact of each cause on the overall performance. We study three existing classifiers: Stanford CoreNLP, NLTK , and SentiStrength . Our results show that most classifiers do not perform well on game reviews, with the best one being NLTK (with an AUC of 0.70). We also identified four main causes for wrong classifications, such as reviews that point out advantages and disadvantages of the game, which might confuse the classifier. The identified causes are not trivial to be resolved and we call upon sentiment analysis and game researchers and developers to prioritize a research agenda that investigates how the performance of sentiment analysis of game reviews can be improved, for instance by developing techniques that can automatically deal with specific game-related issues of reviews (e.g., reviews with advantages and disadvantages). Finally, we show that training sentiment classifiers on reviews that are stratified by the game genre is effective.
Geometric properties of projective manifolds of small degree
Creators: name: Kwak, Sijong
name: Park, Jinhyung
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: The aim of this paper is to study geometric properties of non-degenerate smooth projective varieties of small degree from a birational point of view. First, using the positivity property of double point divisors and the adjunction mappings, we classify smooth projective varieties in $\mathbb P^r$ of degree $d \leq r+2$, and consequently, we show that such varieties are simply connected and rationally connected except in a few cases. This is a generalization of P. Ionescu's work. We also show the finite generation of Cox rings of smooth projective varieties in $\mathbb P^r$ of degree $d \leq r$ with counterexamples for $d=r+1, r+2$. On the other hand, we prove that a non-uniruled smooth projective variety in $\mathbb P^r$ of dimension $n$ and degree $d \leq n(r-n)+2$ is Calabi-Yau, and give an example that shows this bound is also sharp.
description: To appear in Math. Proc. Cambridge Philos. Soc
title: Acute complications after Cesarean Delivery: how to avoid misdiagnosis
Creators: name: Laino, Maria Elena
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Obstetrics
subject: Acute
subject: Surgery
subject: Complications
subject: CT
subject: Obstetrics (Pregnancy / birth / postnatal period)
subject: Genital / Reproductive system female
subject: Emergency

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: In this exhibit we discuss the role of MDCT in the evaluation of specific Cesarean Delivery (CD) complications, focusing on the difference between normal and abnormal post-operative findings in order to help radiologist to avoid...
Evolution and Dynamics of a Matter creation model
Creators: name: Pan, Supriya
name: de Haro, Jaume
name: Paliathanasis, Andronikos
name: Slagter, Reinoud Jan
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In a flat Friedmann-Lema\^ıtre-Robertson-Walker (FLRW) geometry, we consider the expansion of the universe powered by the gravitationally induced `adiabatic' matter creation. To demonstrate how matter creation works well with the expanding universe, we have considered a general creation rate and analyzed this rate in the framework of dynamical analysis. The dynamical analysis hints the presence of a non-singular universe (without the big bang singularity) with two successive accelerated phases, one at the very early phase of the universe (i.e. inflation), and the other one describes the current accelerating universe, where this early, late accelerated phases are associated with an unstable fixed point (i.e. repeller) and a stable fixed (attractor) points, respectively. We have described this phenomena by analytic solutions of the Hubble function and the scale factor of the FLRW universe. Using Jacobi Last multiplier method, we have found a Lagrangian for this matter creation rate describing this scenario of the universe. To match with our early physics results, we introduce an equivalent dynamics driven by a single scalar field and discussed the associated observable parameters compared them with the latest PLANCK data sets. Finally, introducing the teleparallel modified gravity, we have established an equivalent gravitational theory in the framework of matter creation.
description: 15 pages (two column format), 3 figures, Some typos corrected, Published version in MNRAS
Imaging ambipolar two-dimensional carriers induced by the spontaneous electric polarization of a polar semiconductor BiTeI
Creators: name: Kohsaka, Y.
name: Kanou, M.
name: Takagi, H.
name: Hanaguri, T.
name: Sasagawa, T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) mobile carriers are a wellspring of quantum phenomena. Among various 2D-carrier systems, such as field effect transistors and heterostructures, polar materials hold a unique potential; the spontaneous electric polarization in the bulk could generate positive and negative 2D carriers at the surface. Although several experiments have shown ambipolar carriers at the surface of a polar semiconductor BiTeI, their origin is yet to be specified. Here we provide compelling experimental evidences that the ambipolar 2D carriers at the surface of BiTeI are induced by the spontaneous electric polarization. By imaging electron standing waves with spectroscopic imaging scanning tunneling microscopy, we find that positive or negative carriers with Rashba-type spin splitting emerge at the surface correspondingly to the polar directions in the bulk. The electron densities at the surface are constant independently of those in the bulk, corroborating that the 2D carriers are induced by the spontaneous electric polarization. We also successfully image that lateral $p$-$n$ junctions are formed along the boundaries of submicron-scale domains with opposite polar directions. Our study presents a novel means to endow non-volatile, spin-polarized, and ambipolar 2D carriers as well as, without elaborate fabrication, lateral $p$-$n$ junctions of those carriers at atomically-sharp interfaces.
description: 23 pages, 8 figures
Attachment and engagement in sexual rejection Study 3
Creators: name: Dobson, Kiersten
name: Stanton, Sarah
name: Campbell, Lorne
name: Pink, Jennifer
name: Lab, SHaRe
name: Lab, Relationships and Well-Being
Publisher: name: Open Science Framework
Year: 2022

description: The current study will replicate and extend the findings of Studies 1 and 2 with dyadic daily diary data.
Spin wave approach to the two-magnon Raman scattering in an J1x-J1y-J2-Jc antiferromagnetic Heisenberg model
Creators: name: Liu, Changle
name: Yu, Rong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the two-magnon non-resonant Raman scattering in the (pi,pi) and (pi,0) ordered antiferromagnetic phases of a J1x-J1y-J2-Jc Heisenberg model on the tetragonal lattice within the framework of the spin-wave theory. We discuss the effects of various tuning factors to the two-magnon Raman spectra. We find that both the magnetic frustration J2/J1 and the interlayer exchange coupling Jc may significantly affect the spectra in both the B1g and A1g' channels in the (pi,pi) Neel ordered phase. Moreover, we find a splitting of the two-magnon peak in the (pi,0) antiferromagnetic phase. We further discuss the implications of our results to the BaMnBi2 and iron pnictide systems.
description: 11 pages, 10 figures, 5 tables
Multilabel 12-Lead Electrocardiogram Classification Using Beat To Sequence Autoencoders
Creators: Wong, A.W.
Salimi, A.
Hindle, Abram
Kalmady, S.V.
Kaul, P.
Publisher: name: University of Alberta Library
Year: 2021

The 12-lead electrocardiogram (ECG) measures the electrical activity of the heart for physicians to use in diagnosing cardiac disorders. This paper investigates the multi-label, multi-class classification of ECG records into one or more of 27 possible medical diagnoses. Our multi-step approach uses conventional physiological algorithms for segmentation of heartbeats from the baseline signals. We stack a heartbeat autoencoder over heartbeat windows to make embeddings, then we encode this sequence of embeddings to make an ECG embedding which we then classify on. We utilize the public dataset of 43,101 available ECG records provided by the PhysioNet/CinC 2020 challenge, performing repeated random subsampling and splitting the available records into 80% training, 10% validation, and 10% test splits, 20 times. We attain a mean test split challenge score of 0.248 with an overall macro F 1 score of 0.260 across the 27 labels.
title: La glace sur les toits
Creators: name: Baker, M. C.
Publisher: name: Conseil national de recherches du Canada. Division des recherches en construction
Year: 1968
Subjects: subject: Snow and Ice loads
valueUri: urn:ircsubjects:IRC0373
subject: Surcharges neige et glace
valueUri: urn:ircsubjects:IRC0373
subject: roofing
subject: couvertures
subject: ice
subject: glace (gel)
subject: pitched roofs
subject: toiture inclinée
subject: flat roofs
subject: toiture terrasse
subject: heating cables
subject: cable de chauffage électrique
subject: ice dams
subject: barrage à glace

description: Ce Digeste traite principalement de la présence de la glace sur les avant-toits inclinés. Il décrit les conditions entraînant la formation des barrières de glace et des fuites de toits, les précautions à prendre au stade de la conception et les remèdes ultérieurs permettant de limiter la formation de la glace et des fuites.
An Empirical Study to Investigate Collaboration Among Developers in Open Source Software (OSS)
Creators: Sun, W.
Iwuchukwu, S.
Bangash, A.A.
Hindle, Abram
Publisher: name: University of Alberta Library
Year: 2023

The value of teamwork is being recognized by project owners, resulting in an increased acknowledgement of collaboration among developers in software engineering. A good understanding of how developers work together could positively impact software development practices. In this paper, we investigate the collaboration habits of developers in project files by leveraging the World of Code (WoC) dataset and GitHub API. We first identify the collaboration level of developers within the project files, such as the source, test, documentation, and build files, using the Author Cross Entropy (ACE). From the results we find out that test files report the highest degree of collaboration among the developers, perhaps because collaboration is critical to ensure convergence of functionality tests. Furthermore, the source code files show the least degree of collaboration, perhaps because of code ownership and the complexity and difficulty in code modification. Secondly, given the widespread usage of the Python programming language, we investigate the Python code tokens that are more prone to change and collaboration. Our findings offer insights into the specific project files and Python code tokens that developers typically collaborate on in the open-source community. This information can be used by researchers and developers to enhance existing collaboration platforms and tools.
MT-Toolbox: improved amplicon sequencing using molecule tags
Creators: name: Lundberg, Derek S
name: Jones, Corbin
name: Yourstone, Scott M
name: Dangl, Jeffery L.
Publisher: name: BioMed Central Ltd
Year: 2014

description: Abstract Background Short oligonucleotides can be used as markers to tag and track DNA sequences. For example, barcoding techniques (i.e. Multiplex Identifiers or Indexing) use short oligonucleotides to distinguish between reads from different DNA samples pooled for high-throughput sequencing. A similar technique called molecule tagging uses the same principles but is applied to individual DNA template molecules. Each template molecule is tagged with a unique oligonucleotide prior to polymerase chain reaction. The resulting amplicon sequences can be traced back to their original templates by their oligonucleotide tag. Consensus building from sequences sharing the same tag enables inference of original template molecules thereby reducing effects of sequencing error and polymerase chain reaction bias. Several independent groups have developed similar protocols for molecule tagging; however, user-friendly software for build consensus sequences from molecule tagged reads is not readily available or is highly specific for a particular protocol. Results MT-Toolbox recognizes oligonucleotide tags in amplicons and infers the correct template sequence. On a set of molecule tagged test reads, MT-Toolbox generates sequences having on average 0.00047 errors per base. MT-Toolbox includes a graphical user interface, command line interface, and options for speed and accuracy maximization. It can be run in serial on a standard personal computer or in parallel on a Load Sharing Facility based cluster system. An optional plugin provides features for common 16S metagenome profiling analysis such as chimera filtering, building operational taxonomic units, contaminant removal, and taxonomy assignments. Conclusions MT-Toolbox provides an accessible, user-friendly environment for analysis of molecule tagged reads thereby reducing technical errors and polymerase chain reaction bias. These improvements reduce noise and allow for greater precision in single amplicon sequencing experiments.
Rheology of sediment transported by a laminar flow
Creators: name: Houssais, M.
name: Ortiz, C. P.
name: Durian, D. J.
name: Jerolmack, D. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Understanding the dynamics of fluid-driven sediment transport remains challenging, as it is an intermediate region between a granular material and a fluid flow. Boyer \textit{et al.}\citep{Boyer2011} proposed a local rheology unifying dense dry-granular and viscous-suspension flows, but it has been validated only for neutrally-buoyant particles in a confined system. Here we generalize the Boyer \textit{et al.}\citep{Boyer2011} model to account for the weight of a particle by addition of a pressure $P_0$, and test the ability of this model to describe sediment transport in an idealized laboratory river. We subject a bed of settling plastic particles to a laminar-shear flow from above, and use Refractive-Index-Matching to track particles' motion and determine local rheology --- from the fluid-granular interface to deep in the granular bed. Data from all experiments collapse onto a single curve of friction $μ$ as a function of the viscous number $I_v$ over the range $10^{-5} \leq I_v \leq 1$, validating the local rheology model. For $I_v < 10^{-5}$, however, data do not collapse. Instead of undergoing a jamming transition with $μ\rightarrow μ_s$ as expected, particles transition to a creeping regime where we observe a continuous decay of the friction coefficient $μ\leq μ_s$ as $I_v$ decreases. The rheology of this creep regime cannot be described by the local model, and more work is needed to determine whether a non-local rheology model can be modified to account for our findings.
Adult Attachment and Making a Partner Feel Insecure
Creators: name: HARP Lab
name: Stanton, Sarah
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: attachment
subject: dyadic data
subject: insecurity
subject: intimate relationships
subject: longitudinal

description: This preregistration includes the hypotheses and analytic plan document for this sub-project.
title: Les revêtements pour parois intérieures
Creators: name: Ashton, H. E.
Publisher: name: Conseil national de recherches du Canada. Division des recherches en construction
Year: 1968
Subjects: subject: Buildings
valueUri: urn:ircsubjects:IRC0721
subject: Bâtiments
valueUri: urn:ircsubjects:IRC0721
subject: partitions
subject: cloison
subject: interior paints
subject: peinture d'intérieur
subject: brightness
subject: brillance (luisance)

description: L'auteur présente la description et la comparaison des propriétés décidant de l'emploi de différents types de revêtements pour l'intérieur des bâtiments. Il fait quelques recommandations au sujet des surfaces internes des bâtiments publics et domiciliaires.
Got Issues? Do New Features and Code Improvements Affect Defects?
Creators: Posnett, D.
Hindle, Abram
Devanbu, P.
Publisher: name: University of Alberta Library
Year: 2011

There is a perception that when new features are added to a system that those added and modified parts of the source-code are more fault prone. Many have argued that new code and new features are defect prone due to immaturity, lack of testing, as well unstable requirements. Unfortunately most previous work does not investigate the link between a concrete requirement or new feature and the defects it causes, in particular the feature, the changed code and the subsequent defects are rarely investigated. In this paper we investigate the relationship between improvements, new features and defects recorded within an issue tracker. A manual case study is performed to validate the accuracy of these issue types. We combine defect issues and new feature issues with the code from version-control systems that introduces these features, we then explore the relationship of new features with the fault-proneness of their implementations. We describe properties and produce models of the relationship between new features and fault proneness, based on the analysis of issue trackers and version-control systems. We find, surprisingly, that neither improvements nor new features have any significant effect on later defect counts, when controlling for size and total number of changes.
title: Congenital diaphragmatc hernia - does the imaging matter ?
Creators: name: Cilkov, Done
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Congenital
subject: Diagnostic procedure
subject: Ultrasound
subject: MR
subject: CT
subject: Gastrointestinal tract

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To provide an overview of the different types of congenital diaphragmatic hernias (CDH) with the appropriate imaging modalities in pre- and postnatal period; to underline the importance of knowing the relevant radiological findings in early and...
Spin-state chemistry of deuterated ammonia
Creators: name: Sipilä, O.
name: Harju, J.
name: Caselli, P.
name: Schlemmer, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims. We aim to develop a chemical model that contains a consistent description of spin-state chemistry in reactions involving chemical species with multiple deuterons. We apply the model to the specific case of deuterated ammonia, to derive values for the various spin-state ratios. Methods. We apply symmetry rules in the complete scrambling assumption to calculate branching ratio tables for reactions between chemical species that include multiple protons and/or deuterons. Reaction sets for both gas-phase and grain-surface chemistry are generated using an automated routine that forms all possible spin-state variants of any given reaction with up to six H/D atoms. Single-point and modified Bonnor-Ebert models are used to study the density and temperature dependence of ammonia and its isotopologs, and the associated spin-state ratios. Results. We find that the spin-state ratios of the ammonia isotopologs are, at late times, very different from their statistical values. The ratios are rather insensitive to variations in the density, but present strong temperature dependence. We derive high peak values ($\sim$ 0.1) for the deuterium fraction in ammonia, in agreement with previous (gas-phase) models. The deuterium fractionation is strongest at high density, corresponding to a high degree of depletion, and also presents temperature dependence. We find that in the temperature range 5 to 20 K, the deuterium fractionation peaks at $\sim$ 15 K while most of the ortho/para (and meta/para for $\rm ND_3$) ratios present a minimum at 10 K (ortho/para $\rm NH_2D$ has instead a maximum at this temperature). Conclusions. Owing to the density and temperature dependence found in the abundances and spin-state ratios of ammonia and its isotopologs, it is evident that observations of ammonia and its deuterated forms can provide important constraints on the physical structure of molecular clouds.
description: 13 pages, 13 figures, 6 tables; accepted for publication in A&A; arXiv abstract abridged
Continuous Maintenance
Creators: Pang, C.
Hindle, Abram
Publisher: name: University of Alberta Library
Year: 2016

There are many "continuous" practices in software engineering, for example continuous integration (CI), continuous delivery (CD), continuous release (CR), and DevOps. However, the maintenance aspect of continuity is rarely mentioned in publication or education. The continuous practices and applications depend on many repositories and artifacts, such as databases, servers, virtual machines, storage, data, meta-data, various logs, and reports. Continuous maintenance (CM) seeks to maintain these repositories and artifacts properly and consistently through automation, summarization, compaction, archival, and removal. For example, retaining builds and test results created by CI consumes storage. An automated CM process can remove the irrelevant artifacts and compact the relevant artifacts to reduce storage usage. Proper CM is essential for applications' long term sustainability. There are two sides of CM: pre-production and post-production. During the pre-production phase, CM maintains the health of the development environments and the relevant processes. Then during the post-production phase, CM maintains the health of the applications. This paper defines CM for developers. CM complements and completes continuous practices.
International Society of Sports Nutrition Position Stand: protein and exercise
Creators: name: Smith-Ryan, Abbie
Publisher: name: BioMed Central
Year: 2017

description: Abstract Position statement The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows: 1) An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise. 2) For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1.4–2.0 g protein/kg body weight/day (g/kg/d) is sufficient for most exercising individuals, a value that falls in line within the Acceptable Macronutrient Distribution Range published by the Institute of Medicine for protein. 3) There is novel evidence that suggests higher protein intakes (>3.0 g/kg/d) may have positive effects on body composition in resistance-trained individuals (i.e., promote loss of fat mass). 4) Recommendations regarding the optimal protein intake per serving for athletes to maximize MPS are mixed and are dependent upon age and recent resistance exercise stimuli. General recommendations are 0.25 g of a high-quality protein per kg of body weight, or an absolute dose of 20–40 g. 5) Acute protein doses should strive to contain 700–3000 mg of leucine and/or a higher relative leucine content, in addition to a balanced array of the essential amino acids (EAAs). 6) These protein doses should ideally be evenly distributed, every 3–4 h, across the day. 7) The optimal time period during which to ingest protein is likely a matter of individual tolerance, since benefits are derived from pre- or post-workout ingestion; however, the anabolic effect of exercise is long-lasting (at least 24 h), but likely diminishes with increasing time post-exercise. 8) While it is possible for physically active individuals to obtain their daily protein requirements through the consumption of whole foods, supplementation is a practical way of ensuring intake of adequate protein quality and quantity, while minimizing caloric intake, particularly for athletes who typically complete high volumes of training. 9) Rapidly digested proteins that contain high proportions of essential amino acids (EAAs) and adequate leucine, are most effective in stimulating MPS. 10) Different types and quality of protein can affect amino acid bioavailability following protein supplementation. 11) Athletes should consider focusing on whole food sources of protein that contain all of the EAAs (i.e., it is the EAAs that are required to stimulate MPS). 12) Endurance athletes should focus on achieving adequate carbohydrate intake to promote optimal performance; the addition of protein may help to offset muscle damage and promote recovery. 13) Pre-sleep casein protein intake (30–40 g) provides increases in overnight MPS and metabolic rate without influencing lipolysis.
Astronomy and landscape at the prehistoric settlement Villaggio dei Faraglioni, Ustica, Sicily
Creators: name: Martin, Franco Foresta
name: Magli, Giulio
Publisher: name: arXiv
Year: 2016
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: The placement of the Middle Bronze Age settlement Villaggio dei Faraglioni on the Ustica island, one of the best preserved prehistoric village of the Mediterranean area, is analyzed from a cognitive point of view, taking into account archaeoastronomy and landscape archaeology aspects. It turns out that the place might have been selected because of its privileged position with respect to the landscape, better than conforming to utilitarian/defensive considerations, as instead occurs for contemporary, for instance Mycenaean, sites. From the village it was indeed possible to follow the rising and setting of the sun in the months close to the winter solstice on the two elevated peaks existing on the opposite side of the island, in a symmetric way. As a consequence, the inhabitants could determine the day of the winter solstice with an approximation of a few days, using this partial calendar for agricultural and navigational purposes. A possible astronomical orientation of the urban layout is also analyzed
description: Archaeoastronomy/History of Astronomy
The Impact of User Choice on Energy Consumption
Creators: Chenlei, Z.
Hindle, Abram
German, D.M
Publisher: name: University of Alberta Library
Year: 2014

Hardware and software engineers are instrumental in developing energy-efficient mobile systems. Unfortunately, the last mile of energy efficiency relies on end users' choices and requirements. Imagine a user who has no power outlet access and must remain productive on the laptop's battery. How does this person maximize battery life, yet remain productive? What does the user have to give up to keep working? This article highlights the perils that users face and the ultimate responsibility they have for their mobile devices' energy consumption. Using multiple scenarios, the authors show that executing a task can consume more or less energy depending on user requirements and software choices.
title: High frequency orbit ultrasound and sonoelastography - essentials
Creators: name: Lasecki, Mateusz
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Eyes
subject: Elastography
subject: Ultrasound
subject: Ultrasound-Spectral Doppler
subject: Education
subject: Tissue characterisation

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The purpose of this presentation is: 1. to produce detailed didactic images, and anatomical schemes 2. to present “tricks and tips” helping to obtain highly diagnostic images and understand anatomy 3. to describe the proper scanning technique...
title: Admixtures in Portland cement concrete
Creators: name: Swenson, E. G.
Publisher: name: National Research Council of Canada. Division of Building Research
Year: 1968
Subjects: subject: Admixtures
valueUri: urn:ircsubjects:IRC0742
subject: Adjuvants
valueUri: urn:ircsubjects:IRC0742
subject: Portland cement
subject: ciment Portland
subject: additives
subject: additif (agent)
subject: setting agents
subject: accélérateur de prise

description: Common types of concrete admixtures are discussed in relation to their prescribed uses and their secondary effects. Special attention is given to the problems which may arise in practice and the need for better knowledge, among users as well as producers, of the properties these products have on portland cement concrete.
title: Role of MRI in the characterisation of benign pelvic adnexal masses
Creators: name: Pandhi, Shikha
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Cysts
subject: Imaging sequences
subject: MR
subject: Pelvis
subject: Genital / Reproductive system female

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: 1. Discuss the MRI characteristics that help differentiate benign from malignant adnexal masses. 2. Review the spectrum of benign pelvic adnexal masses and describe the imaging characteristics of...
Geographically linking population and facility surveys: methodological considerations
Creators: name: Curtis, Sian
name: Spencer, John
name: Burgert, Clara R
name: Skiles, Martha P
Publisher: name: BioMed Central Ltd
Year: 2013

description: Abstract Background The relationship between health services and population outcomes is an important area of public health research that requires bringing together data on outcomes and the relevant service environment. Linking independent, existing datasets geographically is potentially an efficient approach; however, it raises a number of methodological issues which have not been extensively explored. This sensitivity analysis explores the potential misclassification error introduced when a sample rather than a census of health facilities is used and when household survey clusters are geographically displaced for confidentiality. Methods Using the 2007 Rwanda Service Provision Assessment (RSPA) of all public health facilities and the 2007–2008 Rwanda Interim Demographic and Health Survey (RIDHS), five health facility samples and five household cluster displacements were created to simulate typical SPA samples and household cluster datasets. Facility datasets were matched with cluster datasets to create 36 paired datasets. Four geographic techniques were employed to link clusters with facilities in each paired dataset. The links between clusters and facilities were operationalized by creating health service variables from the RSPA and attaching them to linked RIDHS clusters. Comparisons between the original facility census and undisplaced clusters dataset with the multiple samples and displaced clusters datasets enabled measurement of error due to sampling and displacement. Results Facility sampling produced larger misclassification errors than cluster displacement, underestimating access to services. Distance to the nearest facility was misclassified for over 50% of the clusters when directly linked, while linking to all facilities within an administrative boundary produced the lowest misclassification error. Measuring relative service environment produced equally poor results with over half of the clusters assigned to the incorrect quintile when linked with a sample of facilities and more than one-third misclassified due to displacement. Conclusions At low levels of geographic disaggregation, linking independent facility samples and household clusters is not recommended. Linking facility census data with population data at the cluster level is possible, but misclassification errors associated with geographic displacement of clusters will bias estimates of relationships between service environment and health outcomes. The potential need to link facility and population-based data requires consideration when designing a facility survey.
title: The presence of aortic arch calcifications as an indicatior of intracranial carotid artery calcifications
Creators: name: Zukanovic, Mia
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Vascular
subject: CT
subject: Conventional radiography
subject: Diagnostic procedure
subject: Arteriosclerosis

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Atherosclerosis is a multifactorial, progressive and systemic disease. It is considered the most important cause of morbidity and mortality worldwide, responsible for cardiovascular and cerebrovascular events [1,2]. Stroke is the most important...
Fluctuation conductivity and possible pseudogap state in FeAs-based superconductor EuFeAsO(0.85)F(0.15)
Creators: name: Solovjov, A. L.
name: Omelchenko, L. V.
name: Terekhov, A. V.
name: Khlybov, E. P.
name: Rogacki, K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The study of excess conductivity $σ'(T)$ in the textured polycrystalline FeAs-based superconductor $EuFeAsO_{0.85}F_{0.15}$ ($T_c = 11\, K$) prepared by the solid state synthesis is reported. The $σ'(T)$ analysis has been performed within the Local Pair (LP) model based on the assumption of the LP formation in cuprate high-$T_c$ superconductors (cuprates) below the pseudogap (PG) temperature $T^*\gg T_c$. Similarly to the cuprates, near $T_c$ $σ'(T)$ is adequately described by the 3D term of the Aslamasov-Larkin (AL) theory but the range of the 3D-AL fluctuations, $ΔT_{3D}$, is relatively short. Above the crossover temperature $T_0 \approx 11.7\,K$ $σ'(T)$ is described by the 2D Maki-Thompson (MT) fluctuation term of the Hikami-Larkin (HL) theory. But enhanced 2D-MT fluctuation contribution, being typical for the magnetic superconductors, is observed. Within the LP model approach the PG parameter, $Δ^*(T)$, was determined for the first time. $Δ^*(T)$ shows the narrow maximum at $T_s \approx 160\,K$ followed by the linear drop down to $T_{SDW}=T_{NFe}\approx 133\,K$. Both small $ΔT_{3D}$ and enhanced $σ'(T)$, including linear $Δ^*(T)$ drop, are considered to be the evidence of the enhanced magnetic interaction in $EuFeAsO_{0.85}F_{0.15}$. Importantly, the slop of the linear $Δ^*(T)$ and its length are found to be the same as observed for $SmFeAsO_{0.85}$. The results suggest both the similarity of magnetic interaction processes in different Fe-pnictides and applicability of the LP model approach to the $σ'(T)$ analysis even in magnetic superconductors.
description: 11 pages, 7 figures, 1 table
Syntax and Stack Overflow: A Methodology for Extracting a Corpus of Syntax Errors and Fixes
Creators: Wong, A.W.
Salimi, A.
Chowdhury, S.A.
Hindle, Abram
Publisher: name: University of Alberta Library
Year: 2019

One problem when studying how to find and fix syntax errors is how to get natural and representative examples of syntax errors. Most syntax error datasets are not free, open, and public, or they are extracted from novice programmers and do not represent syntax errors that the general population of developers would make. Programmers of all skill levels post questions and answers to Stack Overflow which may contain snippets of source code along with corresponding text and tags. Many snippets do not parse, thus they are ripe for forming a corpus of syntax errors and corrections. Our primary contribution is an approach for extracting natural syntax errors and their corresponding human made fixes to help syntax error research. A Python abstract syntax tree parser is used to determine preliminary errors and corrections on code blocks extracted from the SOTorrent data set. We further analyzed our code by executing the corrections in a Python interpreter. We applied our methodology to produce a public data set of 62,965 Python Stack Overflow code snippets with corresponding tags, errors, and stack traces. We found that errors made by Stack Overflow users do not match errors made by student developers or random mutations, implying there is a serious representativeness risk within the field. Finally we share our dataset openly so that future researchers can re-use and extend our syntax errors and fixes.
title: Evaluation of standardized uptake values in PET normalized using a predictive equation for lean body mass
Creators: name: Kono, Yumiko
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Nuclear medicine
subject: Professional issues
subject: Computer applications
subject: PET-CT
subject: Complications
subject: Outcomes analysis
subject: Biological effects

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Maximum standardized uptake value (SUV max ) is a commonly used as a semiquantitative parameter in PET/CT studies valuable for diagnosis of various diseases and therapy response. However, It is reported that SUV max is modified by various...
Resistance to aspirin is increased by ST-elevation myocardial infarction and correlates with adenosine diphosphate levels
Creators: name: Lazarowski, Eduardo R.
name: van Heusden, Catharina
Publisher: name: BioMed Central Ltd
Year: 2005

description: Abstract Background To be fully activated platelets are dependent on two positive feedback loops; the formation of thromboxane A2 by cyclooxygenase in the platelets and the release of ADP. We wanted to evaluate the effect of aspirin on platelet function in patients with acute coronary syndromes and we hypothesized that increased levels of ADP in patients with acute coronary syndromes could contribute to aspirin resistance. Methods Platelet activity in 135 patients admitted for chest pain was assessed with PFA-100. An epinephrine-collagen cartridge (EPI-COLL) was used for the detection of aspirin resistance together with an ADP-collagen cartridge (ADP-COLL). ADP was measured with hplc from antecubital vein samples. Three subgroups were compared: chest pain with no sign of cardiac disease (NCD), NonST-elevation myocardial infarction (NSTEMI) and STEMI. Results Platelet activation was increased for the STEMI group compared NCD. Aspirin resistance defined as <193 sec in EPI-COLL was 9.7 % in NCD, and increased to 26.0 % (n.s.) in NSTEMI and 83.3 % (p < 0.001) in STEMI. Chronic aspirin treatment significantly reduced platelet aggregation in NCD and NSTEMI, but it had no effect in STEMI. Plasma levels of ADP were markedly increased in STEMI (905 ± 721 nmol/l, p < 0.01), but not in NSTEMI (317 ± 245), compared to NCD (334 ± 271, mean ± SD). ADP levels correlated with increased platelet activity measured with ADP-COLL (r = -0.30, p < 0.05). Aspirin resistant patients (EPI-COLL < 193 sec) had higher ADP levels compared to aspirin responders (734 ± 807 vs. 282 ± 187 nmol/l, mean ± SD, p < 0.05). Conclusion Platelets are activated and aspirin resistance is more frequent in STEMI, probably due to a general activation of platelets. ADP levels are increased in STEMI and correlates with platelet activation. Increased levels of ADP could be one reason for increased platelet activity and aspirin resistance.
Ground-level ozone following astrophysical ionizing radiation events: an additional biological hazard?
Creators: name: Thomas, Brian C.
name: Goracke, Byron D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Astrophysical ionizing radiation events such as supernovae, gamma-ray bursts, and solar proton events have been recognized as a potential threat to life on Earth, primarily through depletion of stratospheric ozone and subsequent increase in solar UV radiation at Earth's surface and in the upper levels of the ocean. Other work has also considered the potential impact of nitric acid rainout, concluding that no significant threat is likely. Not yet studied to-date is the potential impact of ozone produced in the lower atmosphere following an ionizing radiation event. Ozone is a known irritant to organisms on land and in water and therefore may be a significant additional hazard. Using previously completed atmospheric chemistry modeling we have examined the amount of ozone produced in the lower atmosphere for the case of a gamma-ray burst and find that the values are too small to pose a significant additional threat to the biosphere. These results may be extended to other ionizing radiation events, including supernovae and extreme solar proton events.
description: Accepted for publication in Astrobiology
title: Neonatal tubes and lines: double-edged swords. A graphic comprehensive review about the correct placement of these devices
Creators: name: Reyes Ortiz, Alba lucia
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Vascular
subject: Conventional radiography
subject: Catheter arteriography
subject: Catheters
subject: Image verification

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: A variety of tubes and lines are used in hospitals for long durations as required for managing sick neonates. These devices are a double-edged sword intended to save life, but life-threatening if in the wrong place. Knowledge about adequate location...
title: Systemic review of whole-body disorders induced by natural changes for delivery during pregnancy and puerperal period.
Creators: name: Himoto, Yuki
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Obstetrics
subject: Education
subject: Complications
subject: MR
subject: CT
subject: Obstetrics (Pregnancy / birth / postnatal period)

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The purpose of our educational exhibit is to: understand dynamic physiological and physical changes for delivery in woman body during pregnancy and puerperal period. overview common and uncommon whole-body disorders induced by the natural changes ....
ECG for high-throughput screening of multiple diseases: Proof-of-concept using multi-diagnosis deep learning from population-based datasets
Creators: Sun, W.
Kalmady, S.V.
Salimi, A.S.
Sepehrvand, N.
Ly, E.
Hindle, Abram
Greiner, R.
Kaul, P.
Publisher: name: University of Alberta Library
Year: 2021

Electrocardiogram (ECG) abnormalities are linked to cardiovascular diseases, but may also occur in other non-cardiovascular conditions such as mental, neurological, metabolic and infectious conditions. However, most of the recent success of deep learning (DL) based diagnostic predictions in selected patient cohorts have been limited to a small set of cardiac diseases. In this study, we use a population-based dataset of >250,000 patients with >1000 medical conditions and >2 million ECGs to identify a wide range of diseases that could be accurately diagnosed from the patient’s first in-hospital ECG. Our DL models uncovered 128 diseases and 68 disease categories with strong discriminative performance.
Reactivation of latent HIV-1 in central memory CD4+T cells through TLR-1/2 stimulation
Creators: name: Margolis, David
name: Archin, Nancie M
Publisher: name: BioMed Central
Year: 2013

description: Abstract Background Toll-like receptors (TLRs) are crucial for recognition of pathogen-associated molecular patterns by cells of the innate immune system. TLRs are present and functional in CD4+ T cells. Memory CD4+ T cells, predominantly central memory cells (TCM), constitute the main reservoir of latent HIV-1. However, how TLR ligands affect the quiescence of latent HIV within central memory CD4+ T cells has not been studied. Results We evaluated the ability of a broad panel of TLR agonists to reactivate latent HIV-1. The TLR-1/2 agonist Pam3CSK4 leads to viral reactivation of quiescent HIV in a model of latency based on cultured TCM and in resting CD4+ T cells isolated from aviremic patients. In addition, we investigated the signaling pathway associated with Pam3CSK4 involved in HIV-1 reactivation. We show that the transcription factors NFκB, NFAT and AP-1 cooperate to induce viral reactivation downstream of TLR-1/2 stimulation. Furthermore, increasing levels of cyclin T1 is not required for TLR-mediated viral reactivation, but induction of viral expression requires activated pTEFb. Finally, Pam3CSK4 reactivates latent HIV-1 in the absence of T cell activation or proliferation, in contrast to antigen stimulation. Conclusions Our findings suggest that the signaling through TLR-1/2 pathway via Pam3CSK4 or other reagents should be explored as an anti-latency strategy either alone or in combination with other anti-latency drugs.
On Improving Green Mining For Energy-Aware Software Analysis
Creators: Romansky, S.
Hindle, Abram
Publisher: name: University of Alberta Library
Year: 2014

Consumer demand for longer lasting battery life in mobile computers, as well as industry interest in energy efficient cloud infrastructure, creates a need for hardware and software energy efficiency improvements. One way to tackle this problem is from a software perspective. If it were known which software changes influenced energy consumption, then tools could be created to help software professionals create more energy efficient software. The process of extracting energy consumption information, Green Mining, is time demanding because researchers must run many tests, with sufficient coverage, on each revision in a software product multiple times. The time required for testing acts as a barrier to extracting energy consumption measurements from new software systems. Therefore, this work proposes, implements, and evaluates a search-based approximation method that trades some precision for a speed-up in the mining process. This speed-up enables researchers to study additional software systems that were too costly to investigate before.