cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Decision-making in ice hockey referees : officiating style and accurate detection of penalties
Creators: name: Werger, Jade
Publisher: name: University of British Columbia
Year: 2017

description: Examining officiating in ice hockey has received limited attention, particularly in the area of decision-making at the grassroots, minor ice hockey level. The primary purpose of this research was to create a video tool from hockey game footage and examine minor hockey officials’ decision-making in the context of officiating style and experience. Minor hockey officials possessing three levels of officiating experience: (1) 1 y (n = 10), (2) 2 to 4 y (n = 13), and (3) 5 to 9 y (n=10) completed a Video-Based Infraction Detection Task. Referees were shown video clips of potential penalty scenarios from female AAA Bantam and Midget hockey games, according to four game information conditions: (1) No Information, Randomized (NR); (2) No Information, Sequential (NS); (3) Information, Randomized (IR); and (4) Information, Sequential (IS). Specifically, referees received game information (e.g., score) or no game information prior to clip viewing; and the clips were presented randomly or in the sequential order that they occurred during game play. After viewing each clip, referees were asked to determine whether an infraction occurred. The accuracy of the referee’s detection performance was calculated using Signal Detection Theory. A 3 (experience group) x 4 (condition) mixed factorial ANOVA, with repeated measures on the last factor, revealed that all officials performed similarly on the detection task irrespective of experience. A main effect was found for condition, F (3,90) = 40.0, p < .001 and post-hoc comparisons showed superior accuracy in the IR condition (81.8% ± 1.4), followed by the IS condition (74.3% ± 1.5), NS condition (68.5% ± 1.4), and NR condition (60.0% ± 2.2). These findings suggest that game information may assist referees attentional focus to the task, as well as put the referee into the context of the game resulting in superior performance for detecting an infraction. The data is discussed in the context of using video-based protocols for training hockey referees at the grassroots level of officiating. This work also provides future directions and recommendations for the development of video scenarios for referee training, including the incorporation of common stressors identified by minor hockey officials across experience levels.
Martin Gardner's Mistake
Creators: name: Khovanova, Tanya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 60C05

description: When Martin Gardner first presented the Two-Children problem, he made a mistake in its solution. Later he corrected the mistake in another publication, but unfortunately his incorrect solution is more widely known than his correction. In fact, a Tuesday-Child variation of this problem went viral in 2010, and the same flaw keeps reappearing in solutions for that problem as well. In this article, I would like to popularize Martin Gardner's correction and conduct a detailed discussion of the new problem.
description: 10 pages
Strichartz estimates for partially periodic solutions to Schrödinger equations in 4d and applications
Creators: name: Herr, Sebastian
name: Tataru, Daniel
name: Tzvetkov, Nikolay
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q55

description: We consider the energy critical nonlinear Schrödinger equation on periodic domains of the form R^m x T^{4-m} with m=0,1,2,3. Assuming that a certain L^4 Strichartz estimate holds for solutions to the corresponding linear Schrödinger equation, we prove that the nonlinear problem is locally well-posed in the energy space. Then we verify that the L^4 estimate holds if m=2,3, leaving open the cases m=0,1.
description: 15 pages
Dressing cosets revisited
Creators: name: Squellari, Romain
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an alternative algebraic derivation of the dual pair of nonlinear $σ$-models based on the 'dressing cosets' extension of the Poisson-Lie $T$-duality \cite{KS1}. Then we generalize the result to dual pairs of Lagrangians not considered in \cite{KS1}. Our generalization turns out to incorporate the dualisable models constructed by Sfetsos in \cite{Sfet1}.
description: 24 pages
Time as a Physical Field: A Dynamical Paradigm for Resolving the Foundations of Quantum Mechanics and Relativity
Creators: name: Fedotov, Anton
Publisher: name: Zenodo
Year: 2025

description: The nature of time remains one of the most unresolved problems in modern physics. In both general relativity and quantum mechanics, time is treated either as a geometric coordinate or an external parameter, lacking intrinsic dynamics or ontological status. This work introduces a new paradigm in which time emerges as a physical scalar field ϕ(x,t), giving rise to a locally generated temporal flow τ(x,t) via nonlinear transformation. This framework unifies and reinterprets several fundamental issues: the speed of light as an effective property of the time field; quantum entanglement as a resonance between temporal structures; decoherence as a manifestation of temporal field fluctuations; and the arrow of time as an emergent directionality of field interactions. We derive the dynamics of ϕ from a generalized field equation with a symmetry-breaking potential and propose experimental paths for its detection via photonic delays, gravitational phase shifts, and quantum coherence degradation. This approach reframes the deep questions of causality, information, and spacetime structure in terms of a single, dynamic, and testable physical entity — time itself.
Synthesis, spectral characterization, DNA-binding and antimicrobial profile of biological active mixed ligand Schiff base metal(II) complexes incorporating 1,8-diaminonaphthalene
Creators: name: Chandrasekar, Thiravidamani
name: Arunadevi, Alagarraj
name: Raman, Natarajan
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: Mixed-ligand complexes of bivalent metal ions, viz, Co(II), Ni(II), Cu(II), and Zn(II) of the composition [ML(dan)]Cl (where L = Schiff base ligand, dan = 1,8-diaminonaphthalene and M = Co(II), Ni(II), Cu(II), Zn(II)) have been synthesized and characterized. The stoichiometric ratio of the prepared complexes has been estimated using complementary techniques such as elemental analyses, FT-IR, UV-vis and EPR spectra, magnetic and molar conductivity measurements. The study shows that all the complexes have square planar geometry. The synthesized compounds have been tested in vitro against various types of pathogenic bacteria to weigh up their antimicrobial properties. They have lofty activity against the tested bacteria. The complexes have higher activity than the free ligands. The interaction of synthesized complexes with calf thymus DNA (CT-DNA) has been studied by absorption spectroscopic technique and viscosity measurements. The complexes show a successful interaction with CT-DNA via intercalation mode. In addition, molecular docking approach has been performed for predicting the binding free energy of the synthesized compounds with 1BNA receptor.
From Point Defects in Graphene to Two-Dimensional Amorphous Carbon
Creators: name: Kotakoski, J.
name: Krasheninnikov, A. V.
name: Kaiser, U.
name: Meyer, J. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: While crystalline two-dimensional materials have become an experimental reality during the past few years, an amorphous 2-D material has not been reported before. Here, using electron irradiation we create an sp2-hybridized one-atom-thick flat carbon membrane with a random arrangement of polygons, including four-membered carbon rings. We show how the transformation occurs step-by-step by nucleation and growth of low-energy multi-vacancy structures constructed of rotated hexagons and other polygons. Our observations, along with first-principles calculations, provide new insights to the bonding behavior of carbon and dynamics of defects in graphene. The created domains possess a band gap, which may open new possibilities for engineering graphene-based electronic devices.
description: 10 pages, 10 figures including supplementary information
Tone mapping operator for high dynamic range video
Creators: name: Ploumis, Stylianos
Publisher: name: University of British Columbia
Year: 2017

description: High Dynamic Range (HDR) technology is emerging as the new revolution in digital media and has recently been adopted by industry as the new standard for capturing, transmitting and displaying video content. However, as the majority of the existing commercial displays is still only limited to the Standard Dynamic Range (SDR) technology, backward compatibility of HDR with these legacy displays is a topic of high importance. Over the years, several Tone Mapping Operators (TMOs) have been proposed to adapt HDR content, mainly images, to the SDR format. With the recent development of SDR displays, the need for video TMOs became essential. Direct application of image TMOs to HDR video content is not an efficient solution as they yield visual artifacts such as flickering, ghosting and brightness and color inconsistencies. In this thesis we propose an automated, low complexity content adaptive video TMO which delivers high quality, natural looking SDR content. The proposed method is based histogram equalization of perceptually quantized light information and smart distribution of HDR values in the limited SDR domain. Flickering introduced by the mapping process is reduced by our proposed flickering reduction method, while scene changes are detected by our approach, thus successfully maintaining the original HDR artistic intent. The low complexity of the proposed method along with the fact that it does not require any user interaction, make it a suitable candidate for real time applications, such as live broadcasting.
Bibliometric Review. Eine Antwort auf die zunehmende Wissensproduktion?
Creators: name: Steinhardt, Isabel
Publisher: name: Zenodo
Year: 2019
Subjects: bibliometric review

description: Das Wissenschaftssystem sieht sich einer steigenden Anzahl an Publikationen gegenüber. Aufgrund dieses Wachstums an Literatur stellen sich die Fragen, wie können wissenschaftlichen Publikationen angemessen gesichtet, gelesen und für die eigene Forschung nutzbar gemacht werden? Wie können Forschungsfelder sinnvoll erschlossen und eine gemeinsame Wissensbasis ermittelt werden?

Eine methodische Lösung für die Erschließung der Publikationsmengen könnte in dem Verfahren des Bibliometric Review liegen. Hierzu bedarf es aber zunächst einer Systematisierung der bisherigen Anwendung des Bibliometric Review. In der vorliegenden Präsentation wird eine erste Auswertung der bisherigen Anwendungen des Bibliometric Review vorgstellt und eine erste Systematisierung unternommen.
description: Die verwendete Literaturliste liegt hier vor: https://www.zotero.org/groups/2306163/bibliometric_review
Partial Transmutation of Singularities in Optical Instruments
Creators: name: Perczel, Janos
name: Leonhardt, Ulf
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Some interesting optical instruments such as the Eaton lens and the Invisible Sphere require singularities of the refractive index for their implementation. We show how to transmute those singularities into harmless topological defects in anisotropic media without the need for anomalous material properties.
title: Spatial risk: how predator distributions shape habitat use by age-0 cod
Creators: name: MacRobert, Evelyn
Publisher: name: Memorial University of Newfoundland
Year: 2020

description: The early life history stages of fish experience greater mortality rates than older conspecifics, primarily as a result of predation. Determining which habitats pose the highest predation “risk” can help in understanding habitat use by juvenile cod. In two field experiments, I examined spatial and temporal segregation of age-0 Atlantic (Gadus morhua) and Greenland (Gadus macrocephalus ogac) cod from piscivorous fishes. In Chapter 2, I used underwater video footage to construct a habitat map and locate age-0 Atlantic and Greenland cod in Newman Sound, Bonavista Bay, Newfoundland. Age-0 cod significantly associated with uniform eelgrass habitat, as opposed to less use of kelp or bare substrates, with all individuals observed within 1 m of eelgrass patches. In Chapter 3, I tested seasonal and diel habitat associations of 37 individuals of four known piscivorous fish species – age-1+ Atlantic and Greenland cod, cunner (Tautogolabrus adspersus), and shorthorn sculpin (Myoxocephalus scorpius) – using passive acoustic telemetry. Habitat use differed significantly among species. Season significantly affected habitat use for Greenland cod, cunner, and sculpin, whereas diel period significantly influenced habitat use for cunner. Greenland cod and cunner preferred eelgrass in the spring, then transitioned to deeper water habitats (kelp, sparse vegetation, and bare substrates) during summer and fall. Overall, piscivores primarily occupied shallow habitats in spring, and transitioned to deeper water habitats during summer and fall, outside the eelgrass beds frequented by age-0 cod. My thesis demonstrates spatial and temporal segregation of age-0 cod into nursery eelgrass habitat, apart from their predators.
The Formation of Self-Assembled Nanowire Arrays on Ge(001): a DFT Study of Pt Induced Nanowire Arrays
Creators: name: Vanpoucke, Danny E. P.
name: Brocks, Geert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Nanowire (NW) arrays form spontaneously after high temperature annealing of a submonolayer deposition of Pt on a Ge(001) surface. These NWs are a single atom wide, with a length limited only by the underlying beta-terrace to which they are uniquely connected. Using ab-initio density functional theory (DFT) calculations we study possible geometries of the NWs and substrate. Direct comparison to experiment is made via calculated scanning tunneling microscope (STM) images. Based on these images, geometries for the beta-terrace and the NWs are identified, and a formation path for the nanowires as function of increasing local Pt density is presented. We show the beta-terrace to be a dimer row surface reconstruction with a checkerboard pattern of Ge-Ge and Pt-Ge dimers. Most remarkably, comparison of calculated to experimental STM images shows the NWs to consist of germanium atoms embedded in the Pt-lined troughs of the underlying surface, contrary to what was assumed previously in experiments.
description: 6 pages, 4 figures, E-proceedings of 2009 MRS spring Meeting
Understanding physiological and molecular mechanisms of citrus rootstock seedlings in response to alkaline stress by RNA-Seq
Creators: name: 何文(HeWen)
Publisher: name: CNGB
Year: 2025
Subjects: Raw sequence reads
Multispecies
Agricultural

description: Citrus junos Sieb. ex Tanaka is a rootstock that is tolerant to alkaline stress and iron deficiency. Trifoliate orange (Poncirus trifoliata (L.) Raf.), the most widely used rootstock in China, is sensitive to alkaline stress. To investigate the molecular mechanism underlying the tolerance of C. junos to alkaline stress, RNA-seq was empolyed to profile the leaf and root transcriptomes of C. junos and P. trifoliata seedlings.
RNA-seq Analysis of Fxr1-exon15 Specific Knockdown in Myoblasts
Creators: name: 范新浩(Fan Xinhao)
Publisher: name: CNGB
Year: 2025
Subjects: Raw sequence reads
Monoisolate
Model organism

description: Specific siRNA targeting Fxr1-exon15 was designed and transfected into C2C12 myoblasts along with si-NC (negative control). After 3 days of differentiation culture, total RNA was collected from both the control group and the experimental group for RNA-seq analysis.
title: BC Studies: The British Columbian Quarterly, No 200: Winter 2018/19
title: Winter 2018/19
titleType: AlternativeTitle
Creators: name: BC Studies: The British Columbian Quarterly
Publisher: name: BC Studies: The British Columbian Quarterly
Year: 2019

description: Our 200th issue marks the 50th anniversary of BC Studies!


To purchase a print copy of this issue, visit our website.
description: Land Acknowledgement...5
The Front...7
Introduction to the Issue...9-11
A Declaration of Indian Rights: The BC Indian Position Paper (1970)...13-18
My Reflection of That Time...19-26
Photo Vignette - Whale Watching, Salish Style...27-29
Ti wa7 szwatenem. What we know: Indigenous knowledge and learning...31-44
Photo Vignette - T’łisalagi’ lakw School, ‘Yalis (Alert Bay), BC, early days...45-47
Photo Vignette - People Power...49-51
Case Comment - Our Interconnected Journey...53-75
Photo Vignette -  Restraining the Welfare State Solidarity...77-80
Excerpt - Takin’ It Back*...81-86
Community Engagement - The Harms of Drug Prohibition: Ongoing Resistance in Vancouver’s Downtown Eastside...87-96
Excerpt - The Killing Fields, 1997: 1,000 Crosses*...97-98
Poem -  a thousand crosses in oppenheimer park...99-102
Photo Vignette - Erasures...103-106
Photo Vignette - Arrivals: Marking Time...107-110
Gyaahlaangee diinaa iijang. Here Is My Story...111-121
Soundwork - Streamwalkers...123-124
New Media -  Wrapped in the Cloud: An Interview with Meghann O’Brien and Conrad Sly...125-140
Through the Lens of the Land: Reflections from Archaeology, Ethnoecology, and Environmental Science on Collaborations with First Nations, 1970s to the Present...141-160
The Many Ways of Seeing British Columbia...161-168
BC Studies and The Curve of Time: A Reckoning...169-185
Economic Restructuring and Housing Markets in Vancouver: The Role of Secondary Suites...187-214
Workmanship and Relationships: Indigenous Food Trading and Sharing Practices on Vancouver Island...215-239
Chinese and Japanese Market Gardening in the North and Central Okanagan Valley, British Columbia...241-272
Civilized, Roughly: Gender, Race, and the Politics of Leisure in Colonial British Columbia, 1860–1871...273-299
Contributors...301-308
Modeling maximum astrophysical gravitational recoil velocities
Creators: name: Lousto, Carlos O.
name: Zlochower, Yosef
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We measure the recoil velocity as a function of spin for equal-mass, highly-spinning black-hole binaries, with spins in the orbital plane, equal in magnitude and opposite in direction. We confirm that the leading-order effect is linear in the spin and the cosine of angle between the spin direction and the infall direction at merger. We find higher-order corrections that are proportional to the odd powers in both the spin and cosine of this angle. Taking these corrections into account, we predict that the maximum recoil will be 3680+-130 km/s.
description: 8 pages, 7 figures, revtex4
MPEC 2023-X143 : 2023 XB4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 XB4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Three cadmium-5,7-disulfonate-1,4-naphthalenedicarboxylate coordination polymers: syntheses, structures and photoluminescence
Creators: name: Luo, Han-Qi
name: Xu, Meng-Ye
name: Ding, Li-Wen
name: Liu, Qing-Yan
name: Wang, Yu-Ling
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Hematology

description: Three cadmium(II) coordination polymers constructed from 5,7-disulfonate-1,4-naphthalenedicarboxylate and N-containing ligands, {[Cd2(DSNPDC)(phen)(H2O)4]·2.5H2O}n (1), {[Cd2(DSNPDC)(phen)2(H2O)4]·3H2O}n (2) and [Cd2(DSNPDC)(bpy)2(H2O)4]n (3) (H4-DSNPDC = 5,7-disulfonate-1,4-naphthalenedicarboxylic acid, phen = 1,10-phenanthroline, and bpy = 2,2′-bipyridine), were synthesized and characterized. Compound 1 displays a two-dimensional (2D) layered structure. In 2 and 3, the dinuclear [Cd2(COO)2] units are connected by DSNPDC4– ligands to generate one-dimensional (1D) chains. Due to the presence of the terminal chelating phen/bpy ligands, all compounds show low dimensional structures. Compounds 1–3 exhibit fluorescence emissions centered at 378, 419 and 376 nm, respectively, which are assigned to ligand-centered emissions or ligand-to-metal charge transfer.
Βιώσιμη διαχείριση απορριμμάτων και κυκλική οικονομία: ενέργεια από δευτερογενή καύσιμα
Creators: name: Σαμαράς, Δημήτριος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Διαχείριση απορριμμάτων
subject: Εναλλακτικά καύσιμα
subject: Τσιμεντοβιομηχανία
subject: CO2
subject: Φυσικό αέριο
subject: Πετρέλαιο
subject: Άνθρακας
subject: RDF
subject: SDF

description: Η παραγωγή ενέργειας και η διαχείριση των απορριμμάτων, είναι δυο από τα μεγαλύτερα σύγχρονα ζητήματα που απασχολούν έντονα σε παγκόσμιο επίπεδο. Στην παρούσα διπλωματική αναλύεται αρχικά η παγκόσμια παραγωγή ενέργειας ανά Ήπειρο, χώρα, και είδος καυσίμου και στη συνέχεια παρουσιάζονται ξεχωριστά οι παράμετροι που την επηρεάζουν, όπως η τιμή του κάρβουνου, των πετρελαιοειδών, του φυσικού αερίου και των εκπομπών CO2. Παράλληλα με αυτά, παρουσιάζεται και αναλύεται το πρόβλημα των απορριμμάτων σε παγκόσμιο επίπεδο. Η διασύνδεση των δυο ζητημάτων, πραγματοποιείται με την διερεύνηση της κατηγορίας των εναλλακτικών καυσίμων, τα οποία προέρχονται μεν από το ένα ζήτημα, μιας και η παραγωγή τους γίνεται από τα απορρίμματα, εντούτοις δε μπορούν να βοηθήσουν σημαντικά στην επίλυση του έτερου ζητήματος, δηλαδή στην παραγωγή ενέργειας. Ο προσφορότερος κλάδος για χρήση αυτών των καυσίμων, είναι ο κλάδος της τσιμεντοβιομηχανίας, συνεπώς με στόχο την καλύτερη κατανόηση του αναλύονται επιπλέον, τόσο η διαδικασία παραγωγής τσιμέντου, όσο και η ανάλυση του συγκεκριμένου κλάδου. Στα συμπεράσματα, αξιολογούνται τα οφέλη που προκύπτουν από την αύξηση της χρήσης εναλλακτικών καυσίμων στην τσιμεντοβιομηχανία, εκπεφρασμένα με τέσσερεις βασικούς δείκτες (KPI’s), οι οποίοι είναι η αποφυγή εκπομπών CO2, οι τόνοι χρησιμοποιημένων αποβλήτων, η εξοικονόμηση στερεών καυσίμων και η αποφυγή επενδύσεων σε εργοστάσια μετατροπής απορριμμάτων σε ενέργεια. Επίσης αναλύονται οι κύριοι οδηγοί για την αύξηση των ποσοστών χρήσης των εναλλακτικών καυσίμων, που είναι η πολιτική διαχείρισης αποβλήτων, η γραφειοκρατία των σχετικών αδειοδοτήσεων, το επίπεδο εκσυγχρονισμού κάθε εργοστασίου τσιμέντου και οι τιμές των συμβατικών καυσίμων και των δικαιωμάτων εκπομπών CO2. Τέλος αναπτύσσονται τα κύρια εμπόδια που αντιμετωπίζει η ανάπτυξη της χρήσης των εναλλακτικών καυσίμων και είναι η μή διαθεσιμότητα υψηλής ποιότητας εναλλακτικών καυσίμων, η έλλειψη υποδομών και οργάνωσης της διαχείρισης απορριμμάτων και τέλος η δυσκολία δημόσιας αποδοχής της καύσης απορριμμάτων.
On classical and quantum liftings
Creators: name: Accardi, L.
name: Chruściński, D.
name: Kossakowski, A.
name: Matsuoka, T.
name: Ohya, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We analyze the procedure of lifting in classical stochastic and quantum systems. It enables one to `lift' a state of a system into a state of `system+reservoir'. This procedure is important both in quantum information theory and the theory of open systems. We illustrate the general theory of liftings by a particular class related to so called circulant states.
description: 25 pages
Cyanide bridged 2-D homometallic mixed-valence copper coordination polymer: synthesis, crystal architecture, Hirshfeld surface analysis and magnetic behavior
Creators: name: Chowdhury, Habibar
name: Rizzoli, Corrado
name: Adhikary, Chandan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Physiology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 111714 Mental Health
subject: FOS: Health sciences

description: A 2-D homometallic mixed-valence copper coordination polymer, catena-poly[[tetrakis(μ-cyanido)-{(1-(N-acetopyridinine)-2-aminoethane)}-tri-copper] methanol monosolvate], {[Cu3(L)(CN)4]·CH3OH}n (1) [L = 1-(N-acetopyridinine)-2-aminoethane], has been isolated using a one-pot reaction of the building components and was characterized. The crystal structure consists of [CuIIL]2+ units and copper(I) ions bridged by μ-CN anions. The copper(II) center of the CuN5 chromophore displays a square pyramidal coordination geometry provided by three N atoms of the tridentate Schiff base and two N atoms of μ-NC ions, while the copper(I) centers adopt a trigonal-planar geometry. Three copper centers are interconnected through μ-CN/μ-NC via {-Cu1(L)(μ-NC)2Cu2(μ-CN)Cu3(μ-NC)-} units to form 2-D polymeric ribbons parallel to the b-axis. These 2-D polymeric ribbons in the crystalline state are further stabilized through π···π stacking interactions. Hirshfeld surface analysis was performed to gain additional insight into the interactions responsible for the packing of 1. Variable-temperature magnetic susceptibility studies showed a weak ferromagnetic interaction among the copper centers in 1 through cyanide bridges with J = 1.28 cm−1.
Modelling and analysing the impact of flexible technologies on market-based generation investment planning
Creators: name: Oderinwale, Temitayo
Publisher: name: Imperial College London
Year: 2019

description: In recent times, the value of flexibility potentials available at the demand side in addressing techno-economic challenges associated with the decarbonisation of power systems has attracted notable interest from governments, industry and academia. Notwithstanding these interests, its impacts on long-term power system planning has only been investigated using system cost minimisation models. Such models are inherited from the era of vertically integrated power utilities and cannot represent the profit-oriented decisions of the liberalised electricity industry. Available market-based generation investment planning models in technical literature neglect the time-coupling effects in their operational timescale and for this reason are inherently unable to integrate the operation of non-generating flexible technologies. This thesis investigates the impacts of demand flexibility on the long-term investment decisions of a self-interested generation company under different market designs. The thesis proposes a novel time-coupling, bi-level optimisation model which accounts for the energy shifting flexibility of the demand side. This model is further enhanced to also incorporate the operation of reserve markets with demand side participation, thereby presenting a jointly cleared energy and reserves market. This model is solved using rigorous mathematical techniques involving the formulation of a Mathematical Program with Equilibrium Constraint (MPEC) problem and the transformation of the MPEC problem to a Mixed Integer Linear Program (MILP) problem. Different case studies have been carried out to investigate the impact of demand flexibility participating in either only the energy market or in both the energy and reserves market. These case studies demonstrated the similarities in impact of different flexible technologies on the optimal generation investment decisions and enhancing the profit earned by the investing company. The thesis also investigates different scenarios regarding the flexibility of the demand side, market design options and strict carbon targets. The thesis findings show the dependence of the impact of demand flexibility on the optimal investment decisions of the examined generating company on: (i) the market(s) in which demand flexibility participates and (ii) the market design option considered.
Symmetry and Nonstoichiometry as Possible Origin of Ferromagnetism in Nanoscale oxides
Creators: name: Uchino, Takashi
name: Yoko, Toshinobu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show through density functional theory calculations that extended magnetic states can inherently occur in oxides as the size of the crystals is reduced down to the nanometer scale even when they do not explicitly include intrinsic defects. This is because in nanoscale systems crystallographically perfect crystallites paradoxically result in nonstoichiometric compositions owing to the finite number of constituting atoms. In these structurally perfect but stoichiometrically imperfect nanocrystallites, the spin-triplet state is found to be more stable than the spin-singlet state, giving rise to an extended spin distribution that expands over the entire crystal. According to this picture, long-range magnetic order arises from the combined effect of crystal symmetry and nonstoichiometry that can coexist exclusively in nanoscale systems. The idea can also give reasonable explanations for the unprecedented ferromagnetic features observed commonly in nanoscale oxides, including ubiquity, anisotropy, and diluteness.
description: 12 pages, 4 figures
Synthesis, characterization, and photophysical properties of a new 2,5-di(aryl)phosphole derivative and their trigonal copper–phosphole complexes
Creators: name: Rios, Neskarlys
name: Fuentes, Franmerly
name: Oliveros, Deivi
name: Mora, José R.
name: Garcia-Garfido, Juan M.
name: Otero, Yomaira
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: A new phosphole derivative, 2,5-di(2-quinolyl)-1-phenylphosphole (1), was synthesized by using the Fagan–Nugent method. Phosphole 1 was obtained as an air-stable solid in high yield (73%). Additionally, two new copper–phosphole complexes, [CuX(Phosphole)2] (X = Cl (2a), I (2b), Phosphole=1), have been synthesized by reaction of CuX (X = Cl, I) and 1. All compounds were characterized by NMR, ESI-MS, UV–Vis, and fluorescence spectroscopy. The photophysical properties of all compounds were analyzed. UV–Vis spectra of 2a-b show π–π* transitions with shifts very similar to the free phosphole due to that their symmetrical structures inhibiting an efficient intraligand charge transfer, ILCT. Compounds 1, 2a-b exhibit fluorescence between 460 and 583 nm with quantum yields of Φf =0.04 − 0.11. The emission energy of 2b is higher than 2a, suggesting that λmax is affected by the ligand-field strength of the halide in the complexes (I¯ < Cl¯). The suggested structures of 2a-b were analyzed computationally at the PBEPBE/def2svp level of theory. The rotation barrier of the quinolyl group was analyzed by a scan analysis. Then, the 3 D structures of 2a-b were obtained in good agreement with the experimental results.
Free fall and self-force: an historical perspective
Creators: name: Spallicci, Alessandro
Publisher: name: arXiv
Year: 2010
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Free fall has signed the greatest markings in the history of physics through the leaning Pisa tower, the Cambridge apple tree and the Einstein lift. The perspectives offered by the capture of stars by supermassive black holes are to be cherished, because the study of the motion of falling stars will constitute a giant step forward in the understanding of gravitation in the regime of strong field. After an account on the perception of free fall in ancient times and on the behaviour of a gravitating mass in Newtonian physics, this chapter deals with last century debate on the repulsion for a Schwarzschild black hole and mentions the issue of an infalling particle velocity at the horizon. Further, black hole perturbations and numerical methods are presented, paving the way to the introduction of the self-force and other back-action related methods. The impact of the perturbations on the motion of the falling particle is computed via the tail, the back-scattered part of the perturbations, or via a radiative Green function. In the former approach, the self-force acts upon the background geodesic; in the latter, the geodesic is conceived in the total (background plus perturbations) field. Regularisation techniques (mode-sum and Riemann-Hurwitz $z$ function) intervene to cancel divergencies coming from the infinitesimal size of the particle. An account is given on the state of the art, including the last results obtained in this most classical problem, together with a perspective encompassing future space gravitational wave interferometry and head-on particle physics experiments. As free fall is patently non-adiabatic, it requires the most sophisticated techniques for studying the evolution of the motion. In this scenario, the potential of the self-consistent approach, by means of which the background geodesic is continuously corrected by the self-force contribution, is examined.
description: 43 pages; to appear in final form on "Mass and Motion in General Relativity" by Springer (L. Blanchet, A. Spallicci, B. Whiting Eds.) based on the lectures given at the CNRS School on Mass held the 23-25 June 2008 in Orl\'eans. http://www.springer.com/astronomy/cosmology/book/978-90-481-3014-6
Effective Continuum Thresholds for Quark-Hadron Duality in Dispersive Sum Rules
Creators: name: Lucha, Wolfgang
name: Melikhov, Dmitri
name: Simula, Silvano
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Modifying the standard approaches to nonperturbative QCD based on Borel-transformed dispersive sum rules by allowing the effective continuum thresholds required for the implementation of quark-hadron duality to depend on the Borel parameters and on any relevant momentum promises to provide higher accuracy and reliable error estimates for the extracted predictions of hadron characteristics. A careful analysis reveals that the exact effective continuum thresholds do indeed exhibit dependence on the Borel parameter (and on external momenta) and that they are not universal but vary with the correlators under consideration. The striking similarity of our hadron-parameter extraction procedures in QCD, on the one hand, and quantum-theoretical potential models, on the other hand, calls for application of the proposed techniques in QCD.
description: 6 pages, 4 figures, contributed to QCD@Work 2010 - International Workshop on Quantum Chromodynamics: Theory and Experiment (20 - 23 June 2010, Martina Franca, Valle d'Itria, Italy), to appear in the proceedings
The role of white adipose tissue oxylipins in obesity
Creators: name: Olona Ferrer, Antoni
Publisher: name: Imperial College London
Year: 2020

description: Obesity is characterized by the expansion of the white adipose tissue (WAT), which is associated with the risk of suffering from metabolic diseases including type 2 diabetes mellitus (T2DM). Adequate rates of adipocyte differentiation (adipogenesis) promote healthy WAT expansion and metabolic homeostasis. Healthy WAT expansion buffers lipids, preventing ectopic lipid accumulation in organs such as the muscle and liver. On the other hand, pathological WAT expansion, characterized by adipocyte hypertrophy, hypoxia, inflammation and fibrosis, leads to WAT dysfunction and metabolic decline, including hyperlipidaemia and hyperglycaemia. Oxylipins are bioactive lipid mediators that regulate adipogenesis, but little is known about the specific role of the epoxyganase (CytochromeP450) pathway during adipogenesis. In this thesis, we characterized the major CYP2J epoxygenases and established their contribution to adipogenesis in human and rat adipocyte precursor (AP) cells. We first report that inactivation of CYP2J induces spontaneous adipocyte differentiation. We next sought to understand the consequences of CYP2J depletion and spontaneous adipogenesis in whole-body metabolic homeostasis. We used two obesogenic models (Cafeteria diet and ageing) in rats lacking the main WAT epoxygenase (Cyp2j4). The Cyp2j4-/- rats showed relatively higher rates of adipogenesis at basal conditions, which caused increased adiposity and WAT dysfunction upon obesogenic conditions. WAT dysfunction was characterized by adipocyte hypertrophy, macrophage infiltration, interstitial collagen deposition, and elevated pro-inflammatory oxylipin levels (i.e. prostaglandins). Moreover, Cyp2j4-/- rats showed exacerbated hepatic lipid accumulation and insulin resistance, causing unrestrained hepatic glucose production, a hallmark of T2DM. WAT dysfunctional features, including increased macrophage infiltration and collagen deposition, were conserved in obese patients with T2DM when compared to obese but non-T2DM patients. Prostaglandins were also increased in the WAT of T2DM patients. In humans and rats, the association between macrophage infiltration, collagen deposition and prostaglandin levels suggested macrophages as regulators of WAT collagen deposition, possibly through prostaglandin secretion. Therefore, we proposed an alternative usage of oxylipin precursors towards prostaglandin biosynthesis and metabolism in WAT dysfunction, unveiling prostaglandins as a potential therapeutic target to treat WAT inflammation and fibrosis. Together these results elucidate the role of epoxygenases and prostaglandins in regulating adipocyte differentiation, WAT expansion and inflammation.
Assumptions of IV Methods for Observational Epidemiology
Creators: name: Didelez, Vanessa
name: Meng, Sha
name: Sheehan, Nuala A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Instrumental variable (IV) methods are becoming increasingly popular as they seem to offer the only viable way to overcome the problem of unobserved confounding in observational studies. However, some attention has to be paid to the details, as not all such methods target the same causal parameters and some rely on more restrictive parametric assumptions than others. We therefore discuss and contrast the most common IV approaches with relevance to typical applications in observational epidemiology. Further, we illustrate and compare the asymptotic bias of these IV estimators when underlying assumptions are violated in a numerical study. One of our conclusions is that all IV methods encounter problems in the presence of effect modification by unobserved confounders. Since this can never be ruled out for sure, we recommend that practical applications of IV estimators be accompanied routinely by a sensitivity analysis.
description: Published in at http://dx.doi.org/10.1214/09-STS316 the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Carbazolyl-bis(triazole) and Carbazolyl-bis(tetrazole) Complexes of Palladium(II) and Platinum(II)
Creators: name: Samanta, Samya
name: Zheng, Cameron
name: Gajecki, Leah
name: Berg, David J.
name: Oliver, Allen G.
name: Crosby, Tristan
name: Godin, Logan
name: Sandhu, Jaylene
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology

description: The synthesis of several carbazole-bis(triazole) (CzTrR) and carbazole-bis(tetrazole) (CzTR) ligands (5a–d and 6a–d, respectively, where R=Me (a), i–Pr (b), Bz (c) and CH2-2,4,6-C6H2Me3 (d)) is reported. Reaction of these ligands with PdCl2 in refluxing acetonitrile affords the complete series of square planar complexes, Pd(CzTrR)Cl (7a–d) and Pd(CzTR)Cl (8a–d). The analogous platinum complexes are prepared by deprotonation of ligand carbazole nitrogen under nitrogen followed by reaction with Pt(COD)Cl2 to give Pt(CzTrR)Cl (9b, 9d) and Pt(CzTR)Cl (10b, 10d). The X-ray structure of several ligands (5b, 5c, 6c) and their metal complexes (8b, 8d, 9b) are reported. Complexes 7–10d were examined by cyclic voltammetry and DFT calculations to shed light on their electronic structures. The Pd and Pt complexes of the same ligand (CzTr: 7d, 9d; CzT: 8d, 10d) showed very similar oxidation potentials suggesting the lowest oxidation is ligand based. In contrast, oxidations of the tetrazole complexes 7d and 9d were notably more difficult than the triazole complexes 8d and 10d. Both of these observations are supported by DFT calculations that indicate the HOMO is essentially carbazole π-bonding in character.
Towards a new economic paradigm : exploring mental models and message framing effects about ecological economics
Creators: name: Tomaselli, Maria Fernanda
Publisher: name: University of British Columbia
Year: 2017

description: The transition to a sustainable economic paradigm may be one of the most important issues of our times. This study contributes to the effective communication of ecological economics, by: 1) identifying mental models on people’s perceptions about economic growth and the environment, 2) exploring the prevalence of expansionist and ecological attitudes, and segmenting the audience based on these attitudes, and 3) exploring the effects of different messages (about the transition to economies not centered on growth) on people’s thoughts, emotions and attitudes. Sixty interviews and 1,250 online surveys were carried out in British Columbia and Canada, respectively. Data were analysed with NVivo 10, IBM SPSS Statistics 23 and Latent Gold 5.1. Based on the interviews, five mental models were described. These sat in a spectrum of views anchored to an expansionist or to an ecological worldview. The most expansionist views (Cluster A) expressed great faith in indefinite economic growth and human ingenuity. The most ecological perspectives (Cluster E) acknowledged limits to economic growth, recognized the ecological crisis and expressed techno-skepticism. The other perspectives were in the middle of the spectrum. Based on the surveys, three audience segments were identified. Participants in Cluster 1 (41.1%) were the most optimistic towards technology and indefinite economic growth. Members of Cluster 2 (36.3%) did not express strong opinions. Participants in Cluster 3 (22.6%) acknowledged human unsustainability, expressed higher environmental concern and did not believe in indefinite growth. Sociodemographic factors (e.g. gender, political identification) correlated with the mental models and segments. Regarding the framing experiments, the messages influenced participant’s thoughts and emotions. Environmental messages invoked more references to resources and sustainability, while well-being messages generated more comments about overconsumption and happiness. Loss-framed messages caused greater negative emotions than gain-framed messages and the environmental message focused on losses generated the least hope and the greatest fear and anger among frames. There was no evidence that attitudinal responses were influenced by the frames. Most participants agreed with moving into an economic model with reduced consumption levels. This study provides data on topics that have been little explored and offers insights about the impacts of different post-growth messages.
PRINTERS, PUBLISHERS, AND TRANSLATORS OF ÆLFRIC’S EASTER HOMILY IN A TESTIMONIE OF ANTIQUITIE FROM 1566-1687
Creators: name: Leaman, Kristin Browning
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 470503
subject: Book history
classificationCode: 470504
subject: British and Irish literature

description: The popularity and success of A Testimonie of Antiquitie is apparent in the number of printed editions between 1566-1687; as Allen Frantzen writes in his Desire for Origins, it was one of the most frequently printed Old English texts. However, no one has ever conducted a critical examination of every printed edition of Ælfric’s Easter Homily from its first printing in 1566/1567 to its last printed edition in the seventeenth century in 1687. Examining these editions through a book and print history lens is vastly productive. It enables us to see how printers and translators have made lasting impacts on the text and how historical events influenced the editorial decisions and production of the editions. Furthermore, comparing and contrasting the transcriptions and translations in the editions brings new understanding as to how translators and printers were utilizing these texts for editorial and formatting purposes. From this examination, we can draw important connections among the editions; these connections demonstrate which edition a translator and printer utilized for their publication of the text. Tracking the editorial and formatting changes of the editions and placing those changes within a historical context provides key information on why and how these editions were being produced. Moreover, this dissertation exemplifies the trajectory of early modern English book and print history.