cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Assessing Teachers Technology Acceptance and Usage Behavior of Current Job-Related Technologies
Creators: name: Holden, Heather
Publisher: name: Maryland Shared Open Access Repository
Year: 2009
Subjects: Human-Computer Interaction
IT Diffusion
Technology Acceptance Model
Usability
Usage Behavior
User Attitudes

description: Teachers use technology to provide different learning methods to cater to individual students' learning strengths and styles.   In many school districts, teachers are critical stakeholders in the success of technology implementations.  Successful technology initiatives depend on teachers' motivation, knowledge, and skills to implement and utilize job-related technologies.  Many studies suggest that users' acceptances and perceived usability are factors impacting their usage behavior of such technologies.  While some studies focus on teachers' technology integration as well as their barriers and attitudes toward using technology in the classroom, few studies examine teachers' interactions and usability of the technologies they are currently using. This study relies on the Technology Acceptance Model (TAM) which evaluates users' perceived usefulness, ease of use, attitudes, and perceptions on their intentional or actual usage of particular technologies.  This study validates previous TAM research by finding that teachers' acceptance directly influences their usage behavior.  To gain a deeper understanding of the relationship between the user and their usage behavior, we extended the original TAM variables by including additional usability and attitudinal measures. We also explore the less often discussed external variables that have an impact on teachers' acceptance. We find that by including these additional measures we are better able to explain more of the variance than the original model.  By expanding the original perceived ease of use variable to include learnability, memorability, functionality and navigation, we find that the new variable explains much more of the variance in attitudes toward use of a particular technology.  Moreover, we find that an examination of the external variables provide an explanation of both the original and new perceived ease of use variables. This finding suggests that external variables play an important role in understand teachers' perceived usability. While other studies have not confirmed this finding on every group of technology users, the influence of the external variables may vary depending on both the evaluated technology and targeted population.  Nonetheless, we recommend that this new model for future TAM researchers, technology designers, and school districts. In particular, stakeholders can use TAM research to assess teachers' utilization of previous and future technology investments.
title: Herlyn-Werner-Wunderlich syndrome
Creators: name: El Khatib Ghzal, Yasmin
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Genital (female) imaging
subject: Genital / Reproductive system female
subject: Kidney
subject: Paediatric
subject: MR
subject: Ultrasound
subject: Congenital
subject: Clinical Cases

description: Clinical History: A 9-year-old female patient presented with a history of pain and inflammation of the right vulva and labium minus a few months after menarche, with mild response to anti-inflammatory drugs. A surgical report for appendicectomy in another hospital 2 weeks prior showed haemoperitoneum and a bicornuate uterus.

description: 9 years, female
Development of 3D printable gelatin methacryloyl/chondroitin sulfate/hyaluronic acid hydrogels as implantable scaffolds
Creators: name: A. Murphy, Caroline
name: Serafin, Aleksandra
name: Collins, Maurice
Publisher: name: University of Limerick
Year: 2024

description: The development of biomaterials tailored for various tissue engineering applications has been increasingly researched in recent years; however, stimulating cells to synthesise the extracellular matrix (ECM) is still a significant challenge. In this study, we investigate the use of ECM-like hydrogel materials composed of Gelatin methacryloyl (GelMA) and glycosaminoglycans (GAG), such as hyaluronic acid (HA) and chondroitin sulphate (CS), to provide a biomimetic environment for tissue repair. These hydrogels are fully characterised in terms of physico-chemical properties, including compression, swelling behaviour, rheological behaviour and via 3D printing trials. Furthermore, porous scaffolds were developed through freeze drying, producing a scaffold morphology that better promotes cell proliferation, as shown by in vitro analysis with fibroblast cells. We show that after cell seeding, freeze-dried hydrogels resulted in significantly greater amounts of DNA by day 7 compared to the GelMA hydrogel. Furthermore, freeze-dried constructs containing HA or HA/CS were found to have a significantly higher metabolic activity than GelMA alone.
Templation studies of a tetramethylene-bridged hemicarceplex
Creators: name: Pope, Douglas Jay
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents a study of template effects on the formation of hemicarceplex 14«guest from two rigid bowl-shaped molecules (tetrol 7) and four tetramethylene bridges. The use of an appropriate template/guest molecule aids in the shell closure of hemicarceplex 14»guest through stabilizing van der Waals and electrostatic interactions during the transition state leading to formation of hemicarceplex 14»guest. By studying the effects of a template molecule on formation of a hemicarceplex, we gain valuable insight into the non-covalent forces that control self-assembling processes. Potential guest molecules varying in size, shape, polarity and symmetry were screened for templating abilities. The reaction was found to be moderately selective towards the template molecule used and competition experiments between successful guest molecules revealed a template ratio that spanned a factor of one thousand. This template effect is compared to those found previously in the formation of hemicarceplex 13 and carceplex 11. [Formula]
An Empirical Investigation into the Adoption of Open Source Software in Hospitals
Creators: name: Munoz, Gilberto
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Medical informatics
open source software
technology adoption
information systems
hospitals
Information Science (0723)
Health Sciences, Health Care Management (0769)

description: Information technology holds great promise for reducing cost and improving quality in health care. Open source software (OSS) has emerged as a potential alternative to commercial and closed-source products in many domains. OSS has gained considerable attention recently in the health care arena, and proponents claim that it overcomes many of the obstacles to IT adoption that health care organizations face. Yet, how and why OSS is being adopted and implemented within hospitals in particular remains a poorly understood issue. This research attempts to further this understanding so that hospitals may make better informed decisions about adoption of IT, and OSS in particular, in the future.  We use a qualitative grounded theory approach in order to explore the extent of OSS adoption in hospitals as well as the factors facilitating and inhibiting adoption. Surveys and interviews are used to acquire both breadth and depth of understanding. First, a survey was used to explore and characterize the types of OSS products adopted in hospitals and the extent to which they have been adopted. For methodological reasons, we focused on Baltimore, Washington and Northern Virginia area hospitals. Following the survey, semi-structured interviews were conducted with hospital IT managers in order to attain a deeper understanding of the factors that are facilitating and inhibiting the adoption of OSS in hospitals. The findings suggest a very limited adoption of OSS in hospitals. Adopters tend to be very large hospitals, with IT budgets of less than 3% of the total budget and a large number of IT support staff. The results also show that hospitals tend to adopt general-purpose instead of domain-specific OSS. We also found that hospital software vendors are the critical factor facilitating the adoption of OSS in hospitals. Conversely, lack of in-house development, as well as a perceived lack of security, quality, and accountability of OSS products were factors found to be inhibiting adoption. An empirical model describing the adoption of OSS in hospitals, based upon our findings, is presented to illustrate the factors facilitating and inhibiting the adoption of OSS in hospitals.
Revisiting the Architecture of the KOI-89 System
Creators: name: Masuda, Kento
name: Tamayo, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: While high stellar obliquities observed in exoplanetary systems may be attributed to processes that tilt the planetary orbits, it is also possible that they reflect misalignments between protoplanetary disks and stellar spins. This latter hypothesis predicts the presence of co-planar multi-planetary systems misaligned with their central stars. Here we re-evaluate the evidence of such an architecture that has been claimed for the KOI-89 system. KOI-89 is an early-type star with one validated transiting planet KOI-89.01/Kepler-462b (period 84.7 days, radius $3.0\,R_\oplus$) and one transiting planet candidate KOI-89.02 (period 207.6 days, radius $4.0\,R_\oplus$), where the latter exhibits transit timing variations (TTVs). A previous modeling of the stellar gravity-darkening effect in the transit light curves inferred a high stellar obliquity of $\approx70^\circ$. We perform a photodynamical modeling of the Kepler transit light curves, and use the resulting constraints on the orbital configuration and transit times to update the gravity-darkened transit model. As a result, we find no firm evidence for gravity darkening effect in the transit shapes and conclude that stellar obliquity is not constrained by the data. Given evidence for low orbital eccentricities from the dynamical analysis, the system architecture can thus be consistent with many other multi-transiting systems with flat, near-circular orbits aligned with the stellar spin. We find that the TTVs imparted on its neighbor imply that KOI-89.01 has a mass $\gtrsim20\,M_\oplus$. This would render it one of the densest known sub-Neptunes, mostly composed of a solid core. Lower masses are possible if the TTVs are instead due to an unseen third planet.
description: accepted for publication in AJ
title: Sunburst periosteal reaction: An unusual presentation of bone metastases
Creators: name: Vega Gonzalez, Jesus
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Musculoskeletal system
subject: Musculoskeletal bone
subject: Musculoskeletal soft tissue
subject: Oncology
subject: CT
subject: MR
subject: Ultrasound
subject: Biopsy
subject: Diagnostic procedure
subject: Metastases
subject: Clinical Cases

description: Clinical History: A 78-year-old man presented with omalgia and a 3-month hard-mass in his right shoulder. He didn't have any clinical history of interest.

description: 78 years, male
title: Meniscal ossicle
Creators: name: Cruz, Rita
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Musculoskeletal system
subject: Musculoskeletal joint
subject: Conventional radiography
subject: MR
subject: Trauma
subject: Clinical Cases

description: Clinical History: A 29-year-old man presents with left knee pain after a bicycle fall 10 days prior, with occasional locking feeling and knee instability.

description: 29 years, male
A strong case for fast stellar rotation at very low metallicities
Creators: name: Chiappini, C.
name: Hirschi, R.
name: Meynet, G.
name: Ekström, S.
name: Maeder, A.
name: Matteucci, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the effect of new stellar models, which take rotation into account, computed for a metallicity Z = 10^{-8} on the chemical evolution of the earliest phases of the Milky Way. These models are computed under the assumption that the ratio of the initial rotation velocity to the critical velocity of stars is roughly constant with metallicity. This naturally leads to faster rotation at lower metallicity, as metal poor stars are more compact than metal rich ones. We find that the new Z = 10^{-8} stellar yields have a tremendous impact on the interstellar medium nitrogen enrichment for log(O/H)+12 < 7 (or [Fe/H]< -3).We show that upon the inclusion of the Z = 10^{-8} stellar yields in chemical evolution models, both high N/O and C/O ratios are obtained in the very-metal poor metallicity range in agreement with observations. Our results give further support to the idea that stars at very low metallicities could have rotational velocities of the order of 600-800 km s^{-1}.
description: 4 pages, A&A Letters (accepted)
The Role of Governmental Weapons Procurements in Forecasting Monthly Fatalities in Intrastate Conflicts: A Semiparametric Hierarchical Hurdle Model
Creators: name: Fritz, Cornelius
name: Mehrl, Marius
name: Thurner, Paul W.
name: Kauermann, Göran
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Accurate and interpretable forecasting models predicting spatially and temporally fine-grained changes in the numbers of intrastate conflict casualties are of crucial importance for policymakers and international non-governmental organisations (NGOs). Using a count data approach, we propose a hierarchical hurdle regression model to address the corresponding prediction challenge at the monthly PRIO-grid level. More precisely, we model the intensity of local armed conflict at a specific point in time as a three-stage process. Stages one and two of our approach estimate whether we will observe any casualties at the country- and grid-cell-level, respectively, while stage three applies a regression model for truncated data to predict the number of such fatalities conditional upon the previous two stages. Within this modelling framework, we focus on the role of governmental arms imports as a processual factor allowing governments to intensify or deter from fighting. We further argue that a grid cell's geographic remoteness is bound to moderate the effects of these military buildups. Out-of-sample predictions corroborate the effectiveness of our parsimonious and theory-driven model, which enables full transparency combined with accuracy in the forecasting process.
title: Patellofemoral instability: anatomical risk factors
Creators: name: Proenca, Ana
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Musculoskeletal system
subject: Musculoskeletal joint
subject: Paediatric
subject: Conventional radiography
subject: MR
subject: Anatomy and Functional Imaging

description: Clinical History: An 8-year-old female patient presented with a spontaneous patellar dislocation that was manually reduced by paramedics. At the emergency department the patella was clinically reduced and there was soft-tissue swelling. Ten months later, a second episode occurred.

description: 8 years, female
Giorgio Valla and the Theory of Perception Between Physiology and Natural Philosophy
Creators: name: Cavarra, Berenice
name: Cilione, Marco
Publisher: name: Medicina nei secoli: Journal of history of medicine and medical humanities
Year: 2024

description: Giorgio Valla’s cultural activity as a humanist and physician plays a role of fundamental importance in understanding the developments that philosophy and the history of science went through in the second half of the 15th century. His collection of manuscripts and his vast work as a translator of medical treatises are not only a mere material re-appropriation of the philosophical and scientific culture of the Greek world that the Latin West had lost or known only in mediated form, but also the necessary premise for the construction of an organic system of knowledge. This system, inspired by deep Christian convictions, allowed Valla’s selection and organization of sources in the encyclopedic experiment of De expetendis et fugiendis rebus opus (Venice, 1501). Traces of this process of synthesis and rewriting can also be found in the section of Valla’s encyclopedia dedicated to the relationship between internal and external senses, specifically between imagination (namely, Valla’s translation of the technical term φαντασία/φανταστικόν) and sense-organs.
description: Medicina nei secoli: Journal of history of medicine and medical humanities, Vol. 36 No. 2 (2024)
Joint quasiprobability distribution on the measurement outcomes of MUB-driven operators
Creators: name: Rao, H S Smitha
name: Sirsi, Swarnamala
name: Bharath, Karthik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a method to define quasiprobability distributions for general spin-$j$ systems of dimension $n=2j+1$, where $n$ is a prime or power of prime. The method is based on a complete set of orthonormal commuting operators related to Mutually Unbiased Bases which enable (i) a parameterisation of the density matrix and (ii) construction of measurement operators that can be physically realised. As a result we geometrically characterise the set of states for which the quasiprobability distribution is non-negative, and can be viewed as a joint distribution of classical random variables assuming values in a finite set of outcomes. The set is an $(n^2-1)$-dimensional convex polytope with $n+1$ vertices as the only pure states, $n^{n+1}$ number of higher dimensional faces, and $n^3(n+1)/2$ edges.
Hamiltonian formulation, nonintegrability and local bifurcations for the Ostrovsky equation
Creators: name: Choudhury, Roy
name: Ivanov, Rossen I.
name: Liu, Yue
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35Q35, 35Q53, 37K10

description: The Ostrovsky equation is a model for gravity waves propagating down a channel under the influence of Coriolis force. This equation is a modification of the famous Korteweg-de Vries equation and is also Hamiltonian. However the Ostrovsky equation is not integrable and in this contribution we prove its nonintegrability. We also study local bifurcations of its solitary waves.
description: LaTeX, 10 pages, 1 figure
title: An unusual case of a cervical cancer
Creators: name: Antón Jiménez, Alba
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Genital (female) imaging
subject: Biliary Tract / Gallbladder
subject: Genital / Reproductive system female
subject: Oncology
subject: CT
subject: MR
subject: MR-Diffusion/Perfusion
subject: MR-Functional imaging
subject: PET-CT
subject: Ultrasound
subject: Ultrasound-Colour Doppler
subject: Imaging sequences
subject: Tissue characterisation
subject: Clinical Cases

description: Clinical History: A 77-year-old female patient was surgically treated of a cholangiocarcinoma (extended right hepatectomy with main bile duct exeresis) with posterior adjuvant chemo and radiotherapy (due to surgical margin tumour infiltration). For 4 years she was free of disease until she presented to the emergency department with signs of vaginal bleeding.

description: 77 years, female
Fast Jacobian group operations for C_{3,4} curves over a large finite field
Creators: name: Salem, Fatima K. Abu
name: Khuri-Makdisi, Kamal
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Symbolic Computation (cs.SC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 14Q05, 14H40, 14H45, 11Y16, 68W30

description: Let C be an arbitrary smooth algebraic curve of genus g over a large finite field K. We revisit fast addition algorithms in the Jacobian of C due to Khuri-Makdisi (math.NT/0409209, to appear in Math. Comp.). The algorithms, which reduce to linear algebra in vector spaces of dimension O(g) once |K| >> g, and which asymptotically require O(g^{2.376}) field operations using fast linear algebra, are shown to perform efficiently even for certain low genus curves. Specifically, we provide explicit formulae for performing the group law on Jacobians of C_{3,4} curves of genus 3. We show that, typically, the addition of two distinct elements in the Jacobian of a C_{3,4} curve requires 117 multiplications and 2 inversions in K, and an element can be doubled using 129 multiplications and 2 inversions in K. This represents an improvement of approximately 20% over previous methods.
description: 25 pages, identical to version 2 except for a remark about the published version of the article, which includes Magma code for the algorithms
title: Young male with dyspnoea - Complication of an endemic disease
Creators: name: Singh, Aparna
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Chest imaging
subject: Lung
subject: CT-High Resolution
subject: Clinical Cases

description: Clinical History: A 30-year-old male patient presented with complaints of fever since 15 days and shortness of breath since 4 days, which increased progressively. Patient’s SpO2 was 67% on presentation. Laboratory findings revealed leukocytosis and mild hyperbilirubinaemia. Viral panel for influenza, H1N1, EBV, dengue and blood smears for malarial parasites were negative. Scrub typhus antibodies (IgM) were positive.

description: 30 years, male
Giorgio Valla’s Dioscorides (Mutin. A.P.5.17, GR. 115)
Creators: name: Cronier, Marie
Publisher: name: Medicina nei secoli: Journal of history of medicine and medical humanities
Year: 2024

description: Giorgio Valla owned a Greek manuscript of Dioscorides’ De Materia Medica, a reference work in the field of pharmacology for simple medicines. Today kept at the Biblioteca Estense Universitaria in Modena with the shelf mark α.P.5.17, it is partly autograph and bears a subscription dated 1487. Representative of the earliest studies on the Greek text of Discorides’ in Humanist Italy, this manuscript is of particular interest in many respects, not least because of the conditions under which it was produced and the achievements it led to. This article will therefore consider both the production and usage contexts of the manuscript, which place Giorgio Valla at the centre of a network of humanists interested in compiling and interpreting Dioscorides’ text (Ermolao Barbaro, Angelo Poliziano, Nicolò Leoniceno and Alessandro Bondino), as well as the concrete evidence of how Valla could read and use the treatise.
description: Medicina nei secoli: Journal of history of medicine and medical humanities, Vol. 36 No. 2 (2024)
Electronic transport in molecular junctions: The generalized Kadanoff-Baym ansatz with initial contact and correlations
Creators: name: Tuovinen, Riku
name: van Leeuwen, Robert
name: Perfetto, Enrico
name: Stefanucci, Gianluca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The generalized Kadanoff-Baym ansatz (GKBA) offers a computationally inexpensive approach to simulate out-of-equilibrium quantum systems within the framework of nonequilibrium Green's functions. For finite systems the limitation of neglecting initial correlations in the conventional GKBA approach has recently been overcome [Phys. Rev. B 98, 115148 (2018)]. However, in the context of quantum transport the contacted nature of the initial state, i.e., a junction connected to bulk leads, requires a further extension of the GKBA approach. In this work, we lay down a GKBA scheme which includes initial correlations in a partition-free setting. In practice, this means that the equilibration of the initially correlated and contacted molecular junction can be separated from the real-time evolution. The information about the contacted initial state is included in the out-of-equilibrium calculation via explicit evaluation of the memory integral for the embedding self-energy, which can be performed without affecting the computational scaling with the simulation time and system size. We demonstrate the developed method in carbon-based molecular junctions, where we study the role of electron correlations in transient current signatures.
description: 12 pages, 6 figures
Adaptive Intrusion Tolerant Database Systems
Creators: name: Luenam, Pramote
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Information Science (0723)
Computer Science (0984)

description: The explosive growth of the Internet and network connections has led to increased opportunities for attackers to access computer systems illegitimately. As with any real world processes, almost every electronic commerce site uses a Database Management System (DBMS) to store and provide access to information. With the increase in attacks, the need to provide security for these DBMS systems has become critical. While several techniques for providing security have been proposed, very limited research has been done on how to survive a set of successful database attacks that can seriously impair the integrity and availability of a database. Most traditional secure systems cannot adjust their behavior after deployment. As a result, they perform very poorly under certain environmental changes, and their trustworthiness can dramatically change from time to time. Therefore, it is important for survivable systems to have the ability to adapt themselves to their environment. Intrusion Tolerant Database System (ITDB) is a new paradigm for secure database systems that can detect intrusions, isolate attacks, contain damage, and access and repair damage caused by intrusions. What makes ITDB superior to conventional secure approaches is that it has an ability to reconfigure. Thus, it can yield much more stabilized levels of trustworthiness under environmental changes. However, the reconfiguration faces the problem of finding the best system configuration because it must choose out of a very large number of configuration sets and under multiple conflicting criteria, which is a NP-hard (Non-deterministic Polynomial-time hard) problem. This study focuses on two aspects of addressing adaptation problems in ITDB. First, a rule-based mechanism and neuro-fuzzy technique are proposed to apply to the adaptation model so that ITDB can intelligently reconfigure itself to changing environments and efficiently resolve multiple conflict problems. Second, this study examines the effects of the rule-based adaptive controller (RBAC) and the neuro-fuzzy adaptive controller (NFAC) on the adaptation of ITDB. The purpose of this study is to evaluate which of these techniques can yield higher stabilized levels of trustworthiness, data integrity, and data availability in the face of attacks.
title: Corkscrew oesophagus – A rare cause of dysphagia
Creators: name: Chaves, Mariana
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Abdominal imaging
subject: Gastrointestinal tract
subject: Fluoroscopy
subject: Barium meal
subject: Clinical Cases

description: Clinical History: An 80-year-old male patient presented with chest pain, dysphagia, and progressive weight loss. He underwent a cardiac and otorhinolaryngological examination and a cervico-thoracic CT scan, that showed no evidence of malignancy or other relevant findings. As the symptoms persisted, an upper gastrointestinal endoscopy and a videofluorographic swallowing study were requested.

description: 80 years, male
Cultural Aspects of Personal Control: Expectations and Experiences in Old Age
Creators: name: DeMichele, Kimberly
Publisher: name: Maryland Shared Open Access Repository
Year: 2009
Subjects: Aging
Control
Culture
Personal Control
Qualitative
Trajectories

description: Control is a frequently cited psychological construct in the gerontological literature that is correlated with many positive aspects of growing old. Yet surprisingly little is known about how control is experienced in advanced old age. This study sought to expand current understandings beyond the existing psychological models of control by exploring the construct from a cultural perspective. Data were generated from a 4 year qualitative study, The Experience of Suffering in Old Age (NIA R01 AG021112), that examined meanings of suffering in 182 community-dwelling adults, age 80 and older. Random selection was used to draw 16 cases, stratified by gender and ethnicity (4 each African American and European American men and women), for secondary analysis. Narrative analysis was used to deconstruct the meanings, contexts, and nature of control in old age. Results indicate that elders defined control in the context of decidedly American views of the self that emphasized autonomy, productivity, and choice. Experiences, however, often varied from elders' expectations and definitions, since structural inequalities limited opportunities for many elders to experience control. Capacities for control remained intact over time, but racism, sexism, ageism, and physical or cognitive decline often diminished its actual experience. Many elders recalibrated control to extend over a smaller, more manageable world. The findings undermine many existing psychological theories and highlight the growing need for interdisciplinary collaboration in research on aging.
Alignment of Carbon Nanotube Additives for Improved Performance of Magnesium Diboride Superconductors
Creators: name: Dou, Shi Xue
name: Yeoh, Waikong
name: Shcherbakova, Olga
name: Wexler, David
name: Li, Ying
name: Ren, Zhong M.
name: Munroe, Paul
name: Chen, Sookien
name: Tan, Kaisin.
name: Glowacki, Bartek A.
name: MacManus-Driscoll, Judith L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The rapid progress on MgB2 superconductor since its discovery[1] has made this material a strong competitor to low and high temperature superconductors (HTS) for applications with a great potential to catch the niche market such as in magnetic resonant imaging (MRI). Thanks to the lack of weak links and the two-gap superconductivity of MgB2 [2,3] a number of additives have been successfully used to enhance the critical current density, Jc and the upper critical field, Hc2.[4-12] Carbon nanotubes (CNTs) have unusually electrical, mechanical and thermal properties[13-16] and hence is an ideal component to fabricate composites for improving their performance. To take advantages of the extraordinary properties of CNTs it is important to align CNTs in the composites. Here we report a method of alignment of CNTs in the CNT/MgB2 superconductor composite wires through a readily scalable drawing technique. The aligned CNT doped MgB2 wires show an enhancement in magnetic Jc(H) by more than an order of magnitude in high magnetic fields, compared to the undoped ones. The CNTs have also significantly enhanced the heat transfer and dissipation. CNTs have been used mainly in structural materials, but here the advantage of their use in functional composites is shown and this has wider ramifications for other functional materials.
description: 11 pages, 3 figures. to be published in Advanced Materials
title: Extensive peritoneal calcification in a patient with serous borderline ovarian tumour
Creators: name: Blegvad, Christoffer
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Abdominal imaging
subject: Abdomen
subject: Genital / Reproductive system female
subject: Oncology
subject: CT
subject: Calcifications / Calculi
subject: Clinical Cases

description: Clinical History: An 83-year-old female patient with serous borderline ovarian tumour was hospitalised due to abdominal pain, nausea and vomiting. Seven years prior, she was treated with total abdominal hysterectomy and bilateral salpingo-oophorectomy. Unfortunately, two years later she relapsed with disseminated disease. After several unsuccessful courses of chemotherapy, she was now in palliative care.

description: 83 years, female
Clustering Transient Data Streams by Example and by Variable
Creators: name: Chaovalit, Pimwadee
Publisher: name: Maryland Shared Open Access Repository
Year: 2009
Subjects: cluster evolutions
clustering perspectives
data streams clustering
one-pass algorithms
POD-Clus algorithm

description: Due to recent advances in data collection techniques, massive amounts of data are  being collected at an extremely fast pace. Also, these data are potentially unbounded.  Boundless streams of data collected from sensors, equipments, and other data sources  are referred to as “ data streams”. Various data mining tasks can be performed on data  streams in search of interesting patterns. This dissertation studies a particular data  mining task, clustering, which can be used as the first step in many knowledge  discovery processes. By grouping data streams into homogeneous clusters, data  miners can learn about data characteristics which can then be developed into  classification models for new data or predictive models for unknown events.  Data streams clustering calls for data clustering techniques that require only a single  pass access of data and a very short processing time per data point. Moreover, the  system will likely have to discard data that have already been viewed. Therefore,  suitable techniques are needed to incrementally update the clustering model. We  propose a novel method called POD- Clus ( Probability and Distribution- based  Clustering) that complies with the above requirements for data streams clustering.  This dissertation covers two paradigms for data streams clustering. In clustering by  example, data points collected from the same data source can have different cluster  assignments. Alternatively, clustering by variable treats each stream as one unit and  all data points from the same stream must stay in the same cluster. We demonstrate  that POD- Clus is applicable to both paradigms. POD- Clus also handles situations  when clusters evolve. Cluster evolutions are relevant to data streams clustering since  the nature of clusters from the boundless streams may change considerably over time.  We include the following types of cluster evolutions: cluster appearance, cluster  disappearance, cluster splitting, and cluster merging.  The methodologies in this dissertation are grouped into a) clustering by example  without evolution, b) clustering by example with evolution, c) clustering by variable  without evolution, and d) clustering by variable with evolution. We conducted  experiments on POD- Clus and compared against recent data streams clustering  algorithms. Results show significant improvements in clustering results using POD-Clus  as compared to competing algorithms.
Giorgio Valla as a Translator of Aristotle. Philological Remarks on his Latin Translations of Poetics, Magna Moralia, and De Caelo
Creators: name: Giacomelli, Ciro
Publisher: name: Medicina nei secoli: Journal of history of medicine and medical humanities
Year: 2024

description: In 1498, Giorgio Valla published a collection of translations from Greek into Latin. The selection of texts included in this edition is unprecedented, and it reflects Valla’s interests in ancient medicine, science, and philosophy. These new translations were not successful and were almost completely set aside as soon as other translations became available. In this paper, I will offer a first assessment of the three Aristotelian translations published by Valla and included in the 1498 incunable. Out of the three texts translated by Valla, only the Magna Moralia were not already available in a renaissance translation. This explains why only this translation enjoyed a rather wide success, being reprinted several times in the 16th century, while the other two suffered the competition of rival renderings. Valla is the author of the first printed translation of the Poetics. This translation was initially well received and was reprinted twice; it was later abandoned in favour of Alexander Pacius’ version, published in 1536. Valla’s third translation of Aristotle was that of the De Caelo. Despite its merits, Valla’s translation of the De Caelo was unsuccessful: John Argyropulus’ rendering had appeared in print only a few years earlier, and it became the standard reference in the following centuries. This article extends the analysis of Valla’s translations to the Greek sources used by the humanist.
description: Medicina nei secoli: Journal of history of medicine and medical humanities, Vol. 36 No. 2 (2024)
First Search for Low-Frequency CH with a Square Kilometre Array Precursor Telescope
Creators: name: Tremblay, Chenoa D.
name: Green, James A.
name: Mader, Stacy L.
name: Phillips, Chris J.
name: Whiting, Matthew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The diatomic free radical methylidyne (CH) is an important tracer of the interstellar medium and the study of it was critical to our earliest understanding of star formation. Although it is detectable across the electromagnetic spectrum, observations at radio frequencies allow for a study of the kinematics of the diffuse and dense gas in regions of new star formation. There are only two published (single-dish) detections of the low-frequency hyperfine transitions between 700 and 725 MHz, despite the precise frequencies being known. These low-frequency transitions are of particular interest as they are shown in laboratory experiments to be more sensitive to magnetic fields than their high-frequency counterparts (with more pronounced Zeeman splitting). In this work we take advantage of the radio quiet environment and increased resolution of the Australian Square Kilometre Array Pathfinder (ASKAP) over previous searches to make a pilot interferometric search for CH at 724.7883 MHz (the strongest of the hyperfine transitions) in RCW 38. We found the band is clean of radio frequency interference, but we did not detect the signal from this transition to a five sigma sensitivity limit of 0.09 Jy, which corresponds to a total column density upper limit of 1.9x10^18cm^-2 for emission and 1.3x10^14cm^-2 for absorption with an optical depth limit of 0.95. Achieved within 5 hrs of integration, this column density sensitivity should have been adequate to detect the emission or absorption in RCW 38, if it had similar properties to the only previous reported detections in W51.
description: Accepted for publication by PASA, 2 Figures, 1 Table
"Towards a Global Vision of the Church - Dialogue with Latin American Pentecostalism" vom 19-21. März 2019 in Vitória/ES, Brasilien
Creators: name: Hammes, Verena
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 68 Nr. 3 (2019): Ökumenische Rundschau, Band 68, Heft 3
At the right place at the right time - Digital support for personal time management
Creators: name: Lin, Min
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: time management
calendar
to do
conflict management
floating time slot
Palm
Information Science (0723)

description: Calendars and to-do lists, either in paper or digital form, are the most frequently used time management tools. However, the design of these personal time management tools is far from optimal and people are often too busy to memorize all of the important details of their schedules. There are two key types of activities that people need to schedule: events and tasks. An event is defined as an activity that has a designated start time, expected participants, and a location. On the other hand, a task is a piece of work that one intends to accomplish. Often, tasks are not schedule to be completed during a specific period of time, but it is common that tasks will have a deadline by which time they must be completed. Most tools address these two types of activities in isolation, but this is not what typical users want or need. Users want to manage their activities to ensure that everything is completed in a timely manner, not to categorize activities based on the capabilities of the tool being used to organize their lives. This research provides an improved understanding of time management behaviors, integrating the management of events and tasks, and highlighting the most fundamental fact that all of these activities are competing for a single limited resource: time. By adopting such a duration-centric view of time management, this research presents a theoretical mechanism that allows the integration of event and task management. Interviews with sixteen participants confirmed the value of four design concepts: integration of events and tasks, floating time slots, location awareness, and travel time awareness. These concepts were refined through an iterative prototyping of Activity Calendar Tool (ACT). The resulting prototype was evaluated in a controlled experiment with thirty participants, who scheduled 12 activities using ACT and the Palm« Date Book and To Do List respectively. The results confirmed that ACT significantly reduced the number of schedule conflicts. The participants were more satisfied with the resulting schedules and were more satisfied with their overall experience when using ACT than the Palm« solution.
title: Laryngeal chondrosarcoma: A rare cause of airway obstruction
Creators: name: Amante, Sofia
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Head & neck imaging
subject: Head and neck
subject: CT
subject: MR
subject: Clinical Cases

description: Clinical History: A 68-year-old woman presented with a two-year history of cough and progressive dyspnoea. She reported intermittent dysphonia and stridor episodes since one year. She denied smoking and other relevant aerodigestive tract diseases. Spirometry revealed variable upper airway obstruction. Nasopharyngolaryngoscopy showed a subglottic lesion, occupying the left glottic cleft (Fig. 1).

description: 68 years, female
Wilson-Polyakov surfaces and M-theory branes
Creators: name: Chen, Bin
name: Wu, Jun-Bao
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the M-brane description of the Wilson-Polyakov surfaces in six-dimensional (2, 0) field theory at finite temperature. We investigate the membrane solution dual to a straight Wilons-Polyakov surface and compute the interaction potential between two parallel straight strings by using AdS/CFT correspondence. Furthermore we discuss the M5-brane solutions dual to various Wilson-Polyakov surfaces. Finally we obtain an universal result about M5-brane solutions in generic backgrounds.
description: 26 pages, 3 figures; v2 minor changes
Sourcing curvature modes with entropy perturbations in non-singular bouncing cosmologies
Creators: name: Ijjas, Anna
name: Kolevatov, Roman
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The observed temperature fluctuations in the cosmic microwave background can be traced back to primordial curvature modes that are sourced by adiabatic and/or entropic matter perturbations. In this paper, we explore the entropic mechanism in the context of non-singular bouncing cosmologies. We show that curvature modes are naturally generated during `graceful exit,' i.e., when the smoothing slow contraction phase ends and the universe enters the bounce stage. Here, the key role is played by the kinetic energy components that come to dominate the energy density and drive the evolution towards the cosmological bounce.
description: 17 pages
Antoine Gros’s Bonaparte Visitant les Pestiférés de Jaffa: Propaganda or a Medical Illustration?
Creators: name: Damiani, Ernesto
name: Varotto, Elena
name: Galassi, Francesco M.
Publisher: name: Medicina nei secoli: Journal of history of medicine and medical humanities
Year: 2024

description: In September 1804 the French painter Antoine-Jean Gros first exhibited the painting Bonaparte visitant les pestiférés de Jaffa, illustrating Bonaparte touching the bubo of a plague-stricken soldier in Jaffa hospital during the Egyptian campaign. Today, this work is interpreted as blatant propaganda. However, the use of primary sources to reconstruct how people experienced illness in the past is essential. In this work, for the first time we propose a primarily medical interpretation of Gros's painting. According to medicine prior to the "germ theory", fear was considered a moral affection negatively influencing both the contagion and the outcome of plague. Therefore, holding back the fear was the best way to prevent the plague. French medical officers acted accordingly, providing encouraging examples to the soldiers. Especially, the medical officer Desgenettes voluntarily exposed himself to the risk of contagion, inoculating himself with a contaminated lancet. Napoleon's act of touching the bubo depicted by Gros in the painting provided soldiers with another encouraging demonstration of genuine therapeutic value, considering the medicine of the time. It seems, therefore, plausible to conclude that Gros faithfully represented a situation imbued with medical meaning, fully understandable by the public.
description: Medicina nei secoli: Journal of history of medicine and medical humanities, Vol. 36 No. 2 (2024)
The Starburst Contribution to the Extra-Galactic Gamma-Ray Background
Creators: name: Thompson, Todd A.
name: Quataert, Eliot
name: Waxman, Eli
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Cosmic ray protons interacting with gas at the mean density of the interstellar medium in starburst galaxies lose energy rapidly via inelastic collisions with ambient nuclei. The resulting pions produce secondary electrons and positrons, high-energy neutrinos, and gamma-ray photons. We estimate the cumulative gamma-ray emission from starburst galaxies. We find a total integrated background above 100 MeV of F_gamma ~ 10^{-6} GeV/cm^2/s/sr and a corresponding specific intensity at GeV energies of nuI_nu ~ 10^{-7} GeV/cm^2/s/sr. Starbursts may thus account for a significant fraction of the extra-galactic $γ$-ray background. We show that the FIR-radio correlation provides a strong constraint on the gamma-ray emission from starburst galaxies because pions decay into both gamma-rays and radio-emitting electron/positron pairs. We identify several nearby systems where the potential for observing gamma-ray emission is the most favorable (M82, NGC 253, and IC 342), predict their fluxes, and predict a linear FIR-gamma-ray correlation for the densest starbursts. If established, the FIR-gamma-ray correlation would provide strong evidence for the ``calorimeter'' theory of the FIR-radio correlation and would imply that cosmic rays in starburst galaxies interact with gas at approximately the mean density of the interstellar medium (ISM), thereby providing an important constraint on the physics of the ISM in starbursts.
description: text revised and updated in response to referee's comments, 7 pages, 1 table, 1 figure, emulateapj
title: Diffuse brain involvement in a paediatric case of haemophagocytic lymphohistiocytosis
Creators: name: Taylor, Susan
Publisher: name: EURORAD
Year: 2019
Subjects: subject: Paediatric radiology
subject: Neuroradiology brain
subject: MR
subject: Clinical Cases

description: Clinical History: A 12-year-old female patient with a history of sickle beta thalassaemia presented to the emergency department with a presumed pain crisis. During her hospitalisation, she rapidly deteriorated, developing respiratory distress requiring intubation, seizures, hyperthermia unresponsive to antipyretics, and acute encephalopathy. 

description: 12 years, female