cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Performance and Portability of Cloud-based Computer vision: A Software Case Study
Creators: name: Salehian-Dardashti, Soheil
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Software Engineering
subject: Computer Science
subject: Engineering

description: The proliferation of visual sensors in terms variety and magnitude, has commenced an era where rich extensive visual data can be extracted and analyzed with the goal of a better understanding of the world around us. The forefront of this visual data analysis, is the field of computer vision that traditionally has been utilized in centralized systems but in recent years, has experienced an evolution towards a distributed cloud environment. The objective of this work is to analyze the software engineering processes that allow a rapid conversion of a centralized computer vision system to a cloud based distributed one. The work entails in developing the centralized algorithm in the specific realm of driver fatigue detection, analyzing its properties and designing an engineering methodology along with implementing the conversion from centralized to distributed computer vision. The focus of the thesis is on the implementation and real world metrics that represent the challenges in performance and portability attributes of most distributed computer vision systems. The proposed methodology’s merit is demonstrated through the blink detection use case study. Using requirement gathering techniques, the metrics are defined and compared at different stages of development to ensure minimal effort in porting the blink detection system. A generalizable message based architecture is proposed and implemented for a subclass of computer vision algorithms as a stepping stone for future analysis of other computational patterns that are associated with computer vision algorithms and systems.
Covariant And Local Field Theory On The World Sheet
Creators: name: Bardakci, Korkut
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In earlier work, using the light cone picture, a world sheet field theory that sums planar phi^3 graphs was constructed and developed. Since this theory is both non-local and not explicitly Lorentz invariant, it is desirable to have a covariant and local alternative. In this paper, we construct such a covariant and local world sheet theory, and show that it is equivalent to the original non-covariant version.
description: 22 pages,3 figures, typos and eqs.(11) and (63) are corrected
Thirty years of recombinant BCG: new trends for a centenary vaccine
Creators: name: Marques-Neto, Lazaro M
name: Piwowarska, Zuzanna
name: Kanno, Alex I.
name: Moraes, Luana
name: Trentini, Monalisa M
name: Rodriguez, Dunia
name: Silva, Jose L. S. C.
name: Leite, Luciana C. C.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Introduction: Global perception of the potential for Bacille Calmette-Guérin (BCG), and consequently recombinant BCG (rBCG), in a variety of prophylactic and therapeutic applications has been increasing. A century of information on BCG, and three decades of experience with rBCG, has generated solid knowledge in this field. Area covered: Here, we review the current state of knowledge of BCG and rBCG development. Molecular tools have facilitated the expression of a variety of molecules in BCG, with the aim of improving its efficacy as a tuberculosis vaccine, generating polyvalent vaccines against other pathogens, including viruses, bacteria, and parasites, and developing immunotherapy approaches against noninvasive bladder cancer. BCG’s recently appraised heterologous effects and prospects for expanding its application to other diseases are also addressed. Expert opinion: There are high expectations for new tuberculosis vaccines currently undergoing advanced clinical trials, which could change the prospects of the field. Systems biology could reveal effective biomarkers of protection, which would greatly support vaccine development. The development of appropriate large-scale production processes would further support implementation of new vaccines and rBCG products. The next few years should consolidate the broader applications of BCG and produce insights into improvements using the recombinant BCG technology.
Lifshitz Singularities
Creators: name: Horowitz, Gary T.
name: Way, Benson
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Lifshitz spacetimes are possible gravitational duals to strongly coupled field theories with an anisotropic scaling symmetry. These spacetimes however, have a null curvature singularity. We find that higher dimensional embeddings of Lifshitz also have a similar singularity. We study the propagation of test strings in this background and find that they become infinitely excited if they try to propagate through the singularity. This means that the Lifshitz geometry is unstable and will receive large corrections in string theory.
description: 14 pages; v2: comment added
An EPTAS for Budgeted Matroid Independent Set
Creators: name: Doron-Arad, Ilan
name: Kulik, Ariel
name: Shachnai, Hadas
Publisher: name: CISPA
Year: 2023

description: We consider the {\em budgeted matroid independent set} problem. The input is a ground set, where each element has a cost and a non-negative profit, along with a matroid over the elements and a budget. The goal is to select a subset of elements which maximizes the total profit subject to the matroid and budget constraints. Several well known special cases, where we have, e.g., a uniform matroid and a budget, or no matroid constraint (i.e., the classic knapsack problem), admit a fully polynomial-time approximation scheme (FPTAS). In contrast, already a slight generalization to the {\em multi-budgetedmatroid independent set} problem has a PTAS but does not admit an efficient polynomial-time approximation scheme (EPTAS). This implies a PTAS for our problem, which is the best known result prior to this work. Our main contribution is an EPTAS for the budgeted matroid independent set problem. A key idea of the scheme is to find a {\em representative set} for the instance, whose cardinality depends solely on $1/\eps$, where $\eps >0$ is the accuracy parameter of the scheme. The representative set is identified via matroid basis minimization, which can be solved by a simple greedy algorithm. Our scheme enumerates over subsets of the representative set and extends each subset using a linear program. The notion of representative sets may be useful in solving other variants of the budgeted matroid independent set problem.
Searching for Direct Stop Production in Hadronic Top Data at the LHC
Creators: name: Kaplan, David E.
name: Rehermann, Keith
name: Stolarski, Daniel
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We argue that evidence can be uncovered for stops between 300-600 GeV in 5 fb^-1 of 7 TeV proton-proton collisions if they decay into top quarks and light neutral particles. We also show that with 20 fb^-1 of 8 TeV running, discovery or exclusion can be made in large regions of parameter space. Events with a fully hadronic top/anti-top pair and a pair of invisible decay products can be identified with the top-tagging of a fat jet, a single b-tag, a missing transverse energy cut, as well as other kinematic cuts to reduce backgrounds with real top quarks in them. Such cuts obliterate the background suggesting discovery can be made with a handful of events.
description: 8 pages, 7 figures
title: Essays on causal inference and complex networks
Creators: name: Tortù, Costanza
Publisher: name: IMT Alti Studi Lucca
Year: 2020

description: This dissertation is a collection of articles that develop statistical methods for performing causal inference on network data. In bridging these two themes, causal inference and complex networks, the thesis develops four complementary methodological contributions in two main settings that often arise in network data: (i) both the treatment and the outcome are measured at the individual level but the treatment spills over through the network connections; (ii) both the treatment and outcomes are measured at dyadic level. In the first setting, it elaborates innovative techniques for assessing the direct and spillover effects of an intervention in a population of connected units, where the potential outcome of an agent is affected by the treatment status of other interfering agents. In particular, the articles featured in the dissertation expand the existing literature by developing methods that are useful for (i) estimating the effect of an observational multi-valued intervention in a sample of units connected through a weighted network; (ii) detecting and estimating heterogeneous treatment and spillover effects in presence of units who belong to exogenous clusters, and whose interactions are described by cluster-specific networks; (iii) accounting for hidden treatment diffusion processes in a partially unobserved network. In the second setting, the dissertation employs the potential outcomes framework to analyze causal relationships in network formation processes. Specifically, it develops an estimator for the causal effect that the existence of links in a “treatment network” has on the formation of links on an “outcome network,” with both networks being directed.
The Fiction Factory: A Novel
Creators: name: Jansen, Brian
Publisher: name: Arts
Year: 2018
Subjects: subject: Creative Writing
subject: literary ethics
subject: Education--Language and Literature
subject: Literature--American

description: This dissertation is composed of two parts. The first, a critical foreword titled “The Fiction Factory: On Precarity, Popularity, and Piecing Together Our Stories,” discusses my creative work through a theoretical lens. In it, I draw on contemporary discussions around precarity in cultural and academic work, theories of cultural industries, and scholars of the “ethical turn” in literature—such as Wayne Booth, Martha C. Nussbaum, and Marshall Gregory—to explore questions of agency and ethics in popular fiction. In complicating binaries (the sphere of art versus the sphere of commerce; work versus labour; friendship versus transactional relationships), and by taking Leslie McFarlane (better known as Franklin W. Dixon of Hardy Boys fame) as a case study, I seek to turn away from sometimes dismissive treatments of popular fiction and offer a more nuanced and charitable reading of the cultural objects—series fiction, ghostwritten thrillers, popular Young Adult novels—that live or die by the marketplace. The second part of this dissertation is the novel proper, “The Fiction Factory.” Taking inspiration from a New York Magazine exposé by journalist Suzanne Mozes of memoirist James Frey’s “fiction factory,” Full Fathom Five—a publishing venture initiated by Frey and staffed primarily by young Creative Writing MFA graduates who churn out Young Adult novels according to pre-determined formulae for appalling wages and no credit—the novel imagines a literal fiction factory, a corporation where ghostwriter employees manufacture stories for mass consumption for unremarkable wages. “The Fiction Factory” simultaneously dramatizes the corporatization of the arts and the precarity of contemporary labour (particularly labour in the sector of cultural work). The novel illustrates the cultural pervasiveness of storytelling through a commercial office in which daily business is literally conducted in (and in the service of) stories, suggesting how much, ethically, is at stake in each storytelling act.
Direct measurement of general quantum states using weak measurement
Creators: name: Lundeen, Jeff S.
name: Bamber, Charles
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent work [J.S. Lundeen et al. Nature, 474, 188 (2011)] directly measured the wavefunction by weakly measuring a variable followed by a normal (i.e. `strong') measurement of the complementary variable. We generalize this method to mixed states by considering the weak measurement of various products of these observables, thereby providing the density matrix an operational definition in terms of a procedure for its direct measurement. The method only requires measurements in two bases and can be performed `in situ', determining the quantum state without destroying it.
description: This is a later and very different version of arXiv:1110.0727v3 [quant-ph]. New content: a method to directly measure each element of the density matrix, specific Hamiltonians to weakly measure the product of non-commuting observables, and references to recent related work
Recent Progress of Multiferroic Perovskite Manganites
Creators: name: Dong, Shuai
name: Liu, Jun-Ming
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Many multiferroic materials, with various chemical compositions and crystal structures, have been discovered in the past years. Among these multiferroics, some perovskite manganites with ferroelectricity driven by magnetic orders are of particular interest. In these multiferroic perovskite manganites, not only their multiferroic properties are quite prominent, but also the involved physical mechanisms are very plenty and representative. In this Brief Review, we will introduce some recent theoretical and experimental progress on multiferroic manganites.
description: 24 pages, 17 figures. A brief review
An exploratory study of concept maps to model flows on the manufacturing shop floor
Creators: name: Habib, Sajed Ahmed
Publisher: name: University of Calgary
Year: 2007

description: Bibliography: p. 197-207
description: Manufacturing in North America is rapidly declining resulting in outsourcing and unprecedented job losses and associated socio-economic consequences. Responsive manufacturing is proposed as a remedy. However, organizations cannot become truly responsive without achieving a complete understanding of their production operations. While such understanding can be facilitated with the help of visual modeling techniques, the limitations of current techniques prevent organizations from fully realizing their potential. Concept mapping, a visual knowledge modeling technique, is applied for the first time to model essential material, resource, and information flow on the manufacturing shop floor to gain a comprehensive understanding of the production operations. It is found that a concept map with the right combination of structure, symbology, and level of detail can effectively represent the shop floor, aid the identification of potential disturbances, and provide insight. The concept map is also compared to existing visual modeling techniques to demonstrate its abilities.
Privacy Rarely Considered: Exploring Considerations in the Adoption of Third-Party Services by Websites
Creators: name: Utz, Christine
name: Amft, Sabrina
name: Degeling, Martin
name: Holz, Thorsten
name: Fahl, Sascha
name: Schaub, Florian
Publisher: name: CISPA
Year: 2023

description: Modern websites frequently use and embed third-party services to facilitate web development, connect to social media, or for monetization. This often introduces privacy issues as the inclusion of third-party services on a website can allow the third party to collect personal data about the website’s visitors. While the prevalence and mechanisms of third-party web tracking have been widely studied, little is known about the decision processes that lead to websites using third-party functionality and whether efforts are being made to protect their visitors' privacy. We report results from an online survey with 395 participants involved in the creation and maintenance of websites. For ten common website functionalities we investigated if privacy has played a role in decisions about how the functionality is integrated, if specific efforts for privacy protection have been made during integration, and to what degree people are aware of data collection through third parties. We find that ease of integration drives third-party adoption but visitor privacy is considered if there are legal requirements or respective guidelines. Awareness of data collection and privacy risks is higher if the collection is directly associated with the purpose for which the third-party service is used.
Exploring Collective Creativity in Elementary Mathematics Classroom Settings
Creators: name: Aljarrah, Ayman
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Mathematics education
subject: Collective creativity
subject: Mathematical creativity
subject: Metaphors of creativity
subject: Collaborative emergence
subject: Education--Curriculum and Instruction
subject: Education--Elementary

description: The purposes of this research study were to investigate the nature of collective creativity in mathematics learning, offer needed empirical findings concerning collective creativity in Canadian elementary schools, explore ways in which collective creativity might be fostered in such settings, and generate understandings about the role of teachers in this endeavor. To fulfil the objectives of this study, I adopted a design-based research methodology with(in) which I worked closely with the participant teachers and scholars in the field of mathematics education, co-developing classroom tasks that would prompt collective creativity in mathematics and studying the design, implementation, and re-design of these tasks. I used three data collection methods, selected to gain a deeper understanding of my research questions, including: classroom observations, video records, and interviews. In my analysis and interpretation of the data, the main sources of which were the video recordings of students’ problem-solving sessions and teachers’ interviews, I concentrated on the students’ (co)acting and interacting within the group and how such collaborative practices contribute to the emergence of the new. Based on an extensive review of the literature on creativity, I suggested seven metaphors of creativity. Those were then refined and (re)developed over successive iterations of data analysis and interpretation until I ended up with four metaphors to describe the experience of creativity with(in) the collective: summing forces, expanding possibilities, divergent thinking, and assembling things in new ways. These were embodied in, and a representation of, varied, emergent, yet interwoven and recursive learning acts, thus I used collaborative emergence as an overarching framework for them. Moreover, I determined four categories for features of mathematics learning environments that I believe were critical in the emergence of collective creativity in such environments, including: attendance to inquiry-based learning, cultivation of collaborative problem-solving, an engaging learning environment, and thoughtful, subtle interventions. I believe that my metaphors of creativity, their logical implications and entailments, and the construct of emergence of collective creativity, offer teachers a frame for designing, evaluating, structuring, and restructuring their practices—structured and improvised practices—that include choosing, adopting, amending and/or designing learning activities to prompt and promote effective creative learning.
Separable potential model for meson-baryon interaction beyond the S-wave
Creators: name: Krejčiřík, Vojtěch
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A model for low-energy meson-baryon interaction in the strange sector is presented. The interaction is described in terms of separable potentials with multiple partial waves considered. A general solution of Lippmann-Schwinger equation for the scattering of spin zero and spin one-half particles is derived. Next, the general framework is applied to the $\bar{K}N$ sector in a simple model with only the S- and P-waves taken into account. The separable potential is designed to match the chiral perturbation theory at lowest nontrivial order. It is shown that although a simple model with three free parameters works well for the S-wave, it fails to reproduce the P-wave features of kaon-nucleon physics. Most importantly, the P-wave interaction is too weak to express a resonant behavior that could be identified as $Σ(1385)$ resonance.
Electric potential of the electron sound wave: Sharp disappearance in the superconducting state
Creators: name: Avramenko, Yu. A.
name: Bezuglyi, E. V.
name: Burma, N. G.
name: Fil, V. D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the ac electric potential induced by the electron sound wave (a perturbation of the electron distribution function propagating with the Fermi velocity) in single crystals of high purity gallium. The potential and the elastic components of the electron sound demonstrate qualitatively different dependencies on the electron relaxation rate: while the phase of the potential increases with temperature, the phase of elastic displacement decreases. This effect is explained within the multiband model, in which the potential is attributed to the ballistic quasiwave, while the elastic component is associated with the zero-sound wave. We observed a mysterious property of the superconducting state: all manifestations of the potential accompanying the lattice deformations, including usual sound wave, disappear below T_c in almost jumplike manner.
description: 8 pages, 5 figures, to be published in Phys. Rev. B, title changed
Diffusion tensor imaging with tractography in surgical resection of brainstem cavernous malformations: a systematic review and meta-analysis
Creators: name: Al-Salihi, Mohammed Maan
name: Al-Jebur, Maryam Sabah
name: Al-Salihi, Yazen
name: Saha, Ram
name: Daie, Mhran Malek
name: Rahman, Md. Moshiur
name: Ayyad, Ali
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Mental Health

description: Brainstem cavernous malformations are benign subset of cerebral cavernous malformations, which need a special intervention owing to being vital and complex. The diffusion tensor imaging technique, a well-recognized neuroimaging tool, can visualize the white matter tracts and their surroundings and provide promising surgical outcomes. This systematic review and meta-analysis evaluated the effect of preoperative diffusion tensor imaging in patients undergoing surgical resection of brainstem cavernous malformations. Five databases, including PubMed, Scopus, Web of Science, Cochrane Library, and Google Scholar, were searched using a comprehensive search strategy to find any article matching our inclusion criteria. We used Comprehensive Meta-Analysis (CMA) software to analyze the collected data, get the evidence, and report the results as event rate (ER), with their 95% confidence interval (CI). Twenty-eight studies involving 467 patients matched our criteria and 19 studies entered the analysis. Our analysis showed that, in patients undergoing surgical resection of brainstem cavernous malformations assisted by preoperative diffusion tensor imaging, 82.21% achieved total resection. About 12.4% of patients achieved partial resection, 65.65% improved, 8.07% worsened, 25.04% showed no change, 3.59% experienced postoperative re-bleeding, and 0.87% died. The utilization of preoperative diffusion tensor imaging significantly increased the proportion of improved patients and decreased the proportion of worsened patients. However, further controlled research is needed to draw a definite conclusion about the usefulness of its role.
Comprehensive identification of nitroxyl-reactive cysteines in human platelet proteins by quantitative mass spectrometry
Creators: name: Lin, Liwen
Publisher: name: University of British Columbia
Year: 2012

description: HNO, a small compound which can be produced upon hydrolysis of Angeli’s Salt, is known to be able to inhibit platelet aggregation. An important step to elucidate the mechanism of the antiaggregatory effect of HNO and define the drug’s targets is the identification of HNO-reactive proteins in platelets. The sulfhydryl group is considered the major target of HNO. It can be modified into either sulfinamide or disulfide. The sulfinamide modification is directly detectable by mass spectrometry; however, cysteines converted into disulfide groups by HNO cannot be monitored this way, because the origin of the other cysteine it reacts with is unknown. The goal of this thesis was to identify HNO-reactive cysteines in human platelet proteins regardless of the eventual modification states and discover cysteines which might play key roles in platelet inhibition by HNO. In the first series of studies, a differential alkylation method was developed, evaluated on a protein model and applied on human platelets to identify HNO-reactive cysteines. The results show that 32 HNO-reactive cysteines from 18 proteins were identified. Moreover, utilizing the detectable mass shift derived from sulfinamide, the modification states (i.e., sulfinamide or disulfide) of the 32 HNO-reactive cysteines were further investigated. In the second series of studies, isotope-coded affinity tag enrichment was combined with the differential alkylation method to increase the number of HNO-reactive cysteines discovered. The results show that 159 HNO-reactive cysteines from 78 proteins were identified. Studies have shown that platelet inhibition by HNO was time-dependent; the effect was not evident after 60 minutes of incubation with HNO. Therefore, a time-dependent study was performed to identify cysteines whose HNO-induced modifications were reversed after 60 minutes of incubation. The results show that the modifications of 83 cysteines out of the 159 HNO-reactive cysteines were reversible. Based on the reactivity toward HNO, the reversibility of HNO-induced modifications and the biological functions, talin, filamin, α-actinin and integrin αIIbβ3 are proposed as potential drug targets that may play key roles in platelet inhibition by HNO.
Synthesizing Dominant Strategies for Liveness
Creators: name: Finkbeiner, Bernd
name: Passing, Noemi
Publisher: name: CISPA
Year: 2023

description: Reactive synthesis automatically derives a strategy that satisfies a given specification. However, requiring a strategy to meet the specification in every situation is, in many cases, too hard of a requirement. Particularly in compositional synthesis of distributed systems, individual winning strategies for the processes often do not exist. Remorsefree dominance, a weaker notion than winning, accounts for such situations: dominant strategies are only required to be as good as any alternative strategy, i.e., they are allowed to violate the specification if no other strategy would have satisfied it in the same situation. The composition of dominant strategies is only guaranteed to be dominant for safety properties, though; preventing the use of dominance in compositional synthesis for liveness specifications. Yet, safety properties are often not expressive enough. In this paper, we thus introduce a new winning condition for strategies, called delay-dominance, that overcomes this weakness of remorsefree dominance: we show that it is compositional for both safety and liveness specifications, enabling a compositional synthesis algorithm based on delay-dominance for general specifications. Furthermore, we introduce an automaton construction for recognizing delay-dominant strategies and prove its soundness and completeness. The resulting automaton is of single-exponential size in the squared length of the specification and can immediately be used for safraless synthesis procedures. Thus, synthesis of delay-dominant strategies is, as synthesis of winning strategies, in 2EXPTIME.
Lamb shift in muonic deuterium atom
Creators: name: Krutov, A. A.
name: Martynenko, A. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present new investigation of the Lamb shift (2P_{1/2}-2S_{1/2}) in muonic deuterium (mu d) atom using the three-dimensional quasipotential method in quantum electrodynamics. The vacuum polarization, nuclear structure and recoil effects are calculated with the account of contributions of orders alpha^3, alpha^4, alpha^5 and alpha^6. The results are compared with earlier performed calculations. The obtained numerical value of the Lamb shift 202.4139 meV can be considered as a reliable estimate for the comparison with forthcoming experimental data.
description: 24 pages, 11 figures. arXiv admin note: text overlap with arXiv:hep-ph/0612298
title: UCN Perspektiv, Nr. 8 (2020): Internationalisering af læringsmiljøer
title: Internationalisering af læringsmiljøer
titleType: AlternativeTitle
Creators: name: UCN Perspektiv
Publisher: name: UCN Perspektiv
Year: 2020

description: UCN er en af de professionshøjskoler i vores sektor, der er mest internationalt orienteret, og det er vi stolte af. Spørgsmålet er dog alligevel, om vi skaber nok værdi for de studerende med de muligheder, vi har for at berige dem med et internationalt udsyn? De nedslag, som artiklerne i dette tema repræsenterer, giver udtryk for, at der et uforløst potentiale i at integrere internationalisering bedre i den daglige uddannelsespraksis og i uddannelsernes indhold. Derfor giver artiklerne i dette nummer af UCN Perspektiv stof til eftertanke.
description: Et internationalt knockout...4-6 Introduktion til artiklerne...7-8 Illusionen om inklusion...9-16 Lessons to learn locally...17-25 Internationalization concept...26-34 Globalt mindset...35-47 Uforløst potentiale i en bedre integrering af internationalisering i uddannelserne...48-49
Biostratigraphy of Cretaceous and Paleogene Strata from Northern Yukon Territory and District of Mackenzie, Northwest Territories
Creators: name: Bell, Kimberley Marie
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Palynology
subject: biostratigraphy
subject: Cretaceous
subject: Paleogene
subject: Canadian northern basins
subject: Pulcheripollenites
subject: Paleontology

description: The biostratigraphic utility of the angiosperm pollen genus Pulcheripollenites is improved through the development of new biozones. Species of Pulcheripollenites, including one new species, P. sweetii, aid interpretations and correlations within three northern Canadian basins, in combination with additional new palynostratigraphic data and previously published biozonation schemes. Palynological assemblages recovered from the Bonnet Plume, Eagle Plain and Brackett basins determine relative ages and establish correlations with existing biozones that constrain intra- and interbasinal correlations for Upper Cretaceous and Paleogene strata. Strata from the upper Bonnet Plume Formation of the Bonnet Plume Basin range in age from the late Campanian to late Paleocene/early Eocene. The diverse assemblages recovered from the Bonnet Plume Basin contribute to paleogeographic and phytogeographic determinations and point to issues of diachroneity. Assemblages recovered from the Eagle Plain Basin were very impoverished compared to the Bonnet Plume and Brackett basins and contained reworked palynomorphs, making age determinations and biostratigraphic correlations problematic. New biostratigraphic data, including marine macrofauna, foraminifera, and palynomorphs provide significant constraints on the age of the Eagle Plain Group. Strata from the Cody Creek Formation, the youngest unit of the Eagle Plain Group, contained assemblages of six distinct ages including: Late Albian to Cenomanian (or younger), Turonian (or younger), mid-Coniacian (or younger), Santonian to possibly early Campanian, mid- to late Campanian and late Maastrichtian. Distribution of biostratigraphic ages confirms deposition of the Eagle Plain Group as a prograding succession and that Cody Creek strata are time transgressive from south to north. Strata from the East Fork and Little Bear formations of the Brackett Basin range from Turonian (or younger) to mid-Maastrichtian. A marine age equivalent of the Summit Creek Formation is recognized within the East Fork Formation based on palynological analysis. Recycled palynomorphs are common in strata of the Little Bear and East Fork formations and the age of recycled populations are stratigraphically inverted providing evidence for progressive unroofing of the orogenic wedge during Cordilleran orogenesis. This research provides a foundation for regional geologic mapping, basin evolution studies and resource assessment in these northern Canadian basins.
Retrieving the Transmission Spectrum of HD209458b using CHOCOLATE: a new Chromatic Line-Profile Technique
Creators: name: Esparza-Borges, Emma
name: Oshagh, Mahmoudreza
name: Pallé, Enric
Publisher: name: Zenodo
Year: 2021

description: Multi-band photometric transit observations or low resolution spectroscopy (spectro-photometry) are normally used to retrieve the broadband transmission spectra of transiting exoplanets in order to assess the chemical composition of their atmospheres. In this work, we present an alternative approach for recovering the broadband transmission spectra using chromatic Line-Profile Tomography. To validate the method and examine its performance, we used new observational data obtained with the ESPRESSO instruments to retrieve the transmission spectra of the archetypal hot Jupiter HD209458b. Our findings indicate that the recovered transmission spectrum is in good agreement with the results presented in previous studies, which used different methodologies to extract the spectrum.
Towards Tight Security Bounds for OMAC, XCBC and TMAC
Creators: name: Chattopadhyay, Soumya
name: Jha, Ashwin
name: Nandi, Mridul
Publisher: name: CISPA
Year: 2023

description: OMAC -- a single-keyed variant of CBC-MAC by Iwata and Kurosawa -- is a widely used and standardized (NIST FIPS 800-38B, ISO/IEC 29167-10:2017) message authentication code (MAC) algorithm. The best security bound for OMAC is due to Nandi who proved that OMAC's pseudorandom function (PRF) advantage is upper bounded by O(q^2\ell/2^n), where n, q, and \ell, denote the block size of the underlying block cipher, the number of queries, and the maximum permissible query length (in terms of n-bit blocks), respectively. In contrast, there is no attack with matching lower bound. Indeed, the best known attack on OMAC is the folklore birthday attack achieving a lower bound of \Omega(q^2/2^n). In this work, we close this gap for a large range of message lengths. Specifically, we show that OMAC's PRF security is upper bounded by O(q^2/2^n + q\ell^2/2^n). In practical terms, this means that for a 128-bit block cipher, and message lengths up to 64 Gigabyte, OMAC can process up to 264 messages before rekeying (same as the birthday bound). In comparison, the previous bound only allows 248 messages. As a side-effect of our proof technique, we also derive similar tight security bounds for XCBC (by Black and Rogaway) and TMAC (by Kurosawa and Iwata). As a direct consequence of this work, we have established tight security bounds (in a wide range of \ell) for all the CBC-MAC variants, except for the original CBC-MAC.
On relativistic motion of a pair of particles having opposite signs of masses
Creators: name: Ivanov, Pavel
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: (abbreviated) In this note we consider, in a weak-field limit, a relativistic linear motion of two particles with opposite signs of masses having a small difference between their absolute values $m_{1,2}=\pm (μ\pm Δμ) $, $μ> 0$, $|Δμ| \ll μ$ and a small difference between their velocities. Assuming that the weak-field limit holds and the dynamical system is conservative an elementary treatment of the problem based on the laws of energy and momentum conservation shows that the system can be accelerated indefinitely, or attain very large asymptotic values of the Lorentz factor $γ$. The system experiences indefinite acceleration when its energy-momentum vector is null and the mass difference $Δμ\le 0$. When modulus of the square of the norm of the energy-momentum vector, $|N^2|$, is sufficiently small the system can be accelerated to very large $γ\propto |N^2|^{-1}$. It is stressed that when only leading terms in the ratio of a characteristic gravitational radius to the distance between the particles are retained our elementary analysis leads to equations of motion equivalent to those derived from relativistic weak-field equations of motion of Havas and Goldberg 1962. Thus, in the weak-field approximation, it is possible to bring the system to the state with extremely high values of $γ$. The positive energy carried by the particle with positive mass may be conveyed to other physical bodies say, by intercepting this particle with a target. Suppose that there is a process of production of such pairs and the particles with positive mass are intercepted while the negative mass particles are expelled from the region of space occupied by physical bodies of interest. This scheme could provide a persistent transfer of positive energy to the bodies, which may be classified as a 'Perpetuum Motion of Third Kind'.
description: to be published in Physics-Uspekhi, a few misprints are corrected, discussion is extended and one figure is added
Intervening BLR Clouds' Effects on Optical/UV Spectrum
Creators: name: Wang, Ye
name: Ferland, Gary J.
name: Hu, Chen
name: Wang, Jian-Min
name: Du, Pu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recent x-ray observations of Mrk 766 suggest that broad emission line region clouds cross our line of sight and produce variable x-ray absorption. Here we investigate what optical/ultraviolet spectroscopic features would be produced by such "Intervening BLR Clouds" (IBC) crossing our line of sight to the accretion disk, the source of the optical/UV continuum. Although the emission spectrum produced by intervening clouds is identical to the standard BLR model, they may produce absorption features on the optical or UV continuum. Single clouds will have little effect on the optical/UV spectrum because BLR clouds are likely to be much smaller than the accretion disk. This is unlike the X-ray case, where the radiation source is considerably smaller. However, an ensemble of intervening clouds will produce spectroscopic features in the FUV including a strong depression between the Lyman limit and Lyα. The amount of the depression will indicate the line-of-sight covering factor of clouds, an unknown quantity that is important for the ionization of the intergalactic medium and the energy budget of AGN. Comparison with observations suggests that the SED of Mrk 766 may be affected by intervening BLR clouds and IBC may exist in most of AGNs.
description: 22 pages, 11 figures
Simulation Prediction and Experiment Setup of Vacuum Laser Acceleration at Brookhaven National Lab-Accelerator Test Facility
Creators: name: Shao, L.
name: Cline, D.
name: Ding, X.
name: Ho, Y. K.
name: Kong, Q.
name: Xu, J. J.
name: Pogorelsky, I.
name: Yakimenko, V.
name: Kusche, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: This paper presents the pre-experiment plan and prediction of the first stage of Vacuum Laser Acceleration (VLA) collaborating by UCLA, Fudan University and ATF-BNL. This first stage experiment is a Proof-of-Principle to support our previously posted novel VLA theory. Simulations show that based on ATF's current experimental conditions, the electron beam with initial energy of 15MeV can get net energy gain from intense CO2 laser beam. The difference of electron beam energy spread is observable by ATF beam line diagnostics system. Further this energy spread expansion effect increases along with the laser intensity increasing. The proposal has been approved by ATF committee and experiment will be the next project.
“The Challenge Led to Healing”: Survivors’ Experiences of Emotional Distress in a Breast Cancer Recovery Group
Creators: name: McCowan, Michelle Elizabeth
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Psychosocial Oncology
subject: Cancer Recovery
subject: Group Support
subject: Survivorship Care
subject: Illness Support Groups
subject: Breast Cancer
subject: qualitative research
subject: Interpretative Phenomenological Analysis
subject: Health Care Management
subject: Mental Health
subject: Oncology

description: As the number of women living beyond breast cancer continues to grow, the issue of emotional distress during survivorship has become increasingly salient. Many breast cancer survivors, distressed or not, choose to seek post-treatment support through group programs. Nonetheless, there has been a startling lack of research into participants’ experiences within these survivorship groups. In this study, I conducted semi-structured interviews with five breast cancer survivors who felt distressed during their participation in a cancer recovery group program. Interpretative phenomenological analysis (Smith, Flowers, & Larkin, 2009) of participants’ experiences resulted in three overarching themes: (a) Contextual Challenges and Distress, (b) Group-Related Challenges and Distress, and (c) Coping and Healing. I discuss these findings within the context of relevant literature and present implications for group facilitators, care providers, and researchers in psychosocial oncology.
Rate-1 Incompressible Encryption from Standard Assumptions
Creators: name: Branco, Pedro
name: Döttling, Nico
name: Dujmovic, Jesko
Publisher: name: CISPA
Year: 2023

description: Incompressible encryption, recently proposed by Guan, Wichs and Zhandry (EUROCRYPT’22), is a novel encryption paradigm geared towards providing strong long-term security guarantees against adversaries with bounded long-term memory. Given that the adversary forgets just a small fraction of a ciphertext, this notion provides strong security for the message encrypted therein, even if, at some point in the future, the entire secret key is exposed. This comes at the price of having potentially very large ciphertexts. Thus, an important efficiency measure for incompressible encryption is the message-to-ciphertext ratio (also called the rate). Guan et al. provided a low-rate instantiation of this notion from standard assumptions and a rate-1 instantiation from indistinguishability obfuscation (iO). In this work, we propose a simple framework to build rate-1 incompressible encryption from standard assumptions. Our construction can be realized from, e.g. the DDH and additionally the DCR or the LWE assumptions.
Bis(amidate) titanium, zirconium, and tantalum complexes : applications in catalytic synthesis of N-containing compounds
Creators: name: Ayinla, Rashidat Omolabake
Publisher: name: University of British Columbia
Year: 2013

description: A two-part study involving the synthesis and catalytic investigations of amidate complexes of early transition metals is described. In the first part, the substrate scope of an achiral bis(amidate) titanium hydroamination precatalyst has been broaden to include challenging substrates. This complex efficiently catalyzes the hydroamination of heteroatom-containing allenes with arylamines. Control experiments rule out allene-alkyne isomerization as a reaction pathway during this catalysis. The hydrohydrazination of a variety of alkynes with 1,1-disubstituted hydrazines also proceed efficiently in the presence of this precatalyst giving the anti-Markovnikov hydrazone products predominantly. These hydrazones have been transformed into substituted indoles by a one-pot tandem sequential hydroamination/ZnCl₂-mediated cyclization. Importantly, the bis(amidate) titanium precatalyst can be generated in situ for these reactions with no impact on the reactivity or selectivity of the complex. The second part of this thesis focuses on the synthesis, characterization, stability and catalytic investigations of chiral zirconium and tantalum complexes ligated with amidate ancillary ligands. Seven new axially chiral proligands have been synthesized and used for in situ generation of zirconium hydroamination precatalysts. These chiral complexes efficiently produce N-heterocycles in up to 94% isolated yield with ee reaching 74%. Preparative scale synthesis and characterization of the zirconium complexes revealed coordination geometry that is greatly influenced by the steric properties of the ligand. Bulky proligands produce monomeric complexes, wherein the biphenyl ligand displays a κ²-O,O-bonding motif which accounts for the modest enantioselectivities realized with this system. The less sterically-congested proligands initially form similar monomeric complexes; however, these complexes dimerize diastereoselectively to κ⁴-N,O,O-N-bonding amidate complexes within a few hours in solution. The binding motif of the amidate ligand of the chiral biphenyl tantalum complexes is also dictated by the size of the N-substituent of the ligand. While a bulky proligand results in a discrete tantalum κ²-O,O-bonding amidate complex, less sterically-encumbered proligands produce a mixture of κ²-O,O-bonding and κ³-N,O,O-bonding amidate complexes. Using these tantalum complexes as precatalysts, alkenes undergo hydroaminoalkylation reactions with secondary amines to give branched alkylated secondary amines in isolated yields of up to 92% and enantiomeric excesses reaching 66%, for the first examples of an enantioselective hydroaminoalkylation reaction.
Globalt mindset
Creators: name: Nielsby, Ulla
name: Christensen, Line Brix
name: Jensen, Ditte Marie
name: Kristiansen, Mary Anne
Publisher: name: UCN Perspektiv
Year: 2020

description: Projektet er et empirisk tilrettelagt samskabelsesprojekt under internationalt udvalg på tværs af alle medarbejdergrupper på Campus Skolevangen (CSV) i Hjørring. Ideen bag projektet var at udvikle et globalt mindset i form af styrket selvbevidsthed, nysgerrighed og værdsættelse af kulturel mangfoldighed. Den praksisbaserede viden, som udvikles i projektet, udspringer fra opbygningen af et globalt mindset, der imødekommer behovet for som uddannelsesinstitution at danne medarbejdere og studerende til interkulturelle kompetencer og samtidig styrke employabiliteten. Projektet tager afsæt i UCN’s internationale strategi 2020; at styrke et levende internationalt studiemiljø, tiltrække internationale undervisningskompetencer og skabe værdi gennem internationale samarbejder. Projektet er tilrettelagt ud fra et idekatalog med afvikling af syv tværgående aktiviteter: • Indledende survey for alle ansatte på CSV samt afvikling af en fælles temadag under overskriften Globalt mindset og interkulturelle kompetencer • Opstartsdag med eksterne oplægsholdere og workshops • Studietur til Canada • Udvikling af fysisk studiemiljø • Kompetenceudviklende kurser for medarbejdere • Afsluttende survey • Formidling ved afvikling af international week samt formidling af projektet På baggrund af de gennemførte aktiviteter udtrykker medarbejderne en stigende interesse for det internationale samarbejde på tværs af campus. Projektet har med udvikling af et globalt mindset formået at levendegøre UCN’s strategi, hvor erfaringerne fra CSV kan være bærende i en styrket internationaliseringsindsats, herunder Internationalization at Home (IaH).
description: UCN Perspektiv, Nr. 8 (2020): Internationalisering af læringsmiljøer