cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
De Finetti theorem on the CAR algebra
Creators: name: Crismale, Vito
name: Fidaleo, Francesco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Operator Algebras (math.OA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 46L53, 46L05, 60G09, 46L30, 46N50

description: The symmetric states on a quasi local C*-algebra on the infinite set of indices J are those invariant under the action of the group of the permutations moving only a finite, but arbitrary, number of elements of J. The celebrated De Finetti Theorem describes the structure of the symmetric states (i.e. exchangeable probability measures) in classical probability. In the present paper we extend De Finetti Theorem to the case of the CAR algebra, that is for physical systems describing Fermions. Namely, after showing that a symmetric state is automatically even under the natural action of the parity automorphism, we prove that the compact convex set of such states is a Choquet simplex, whose extremal (i.e. ergodic w.r.t. the action of the group of permutations previously described) are precisely the product states in the sense of Araki-Moriya. In order to do that, we also prove some ergodic properties naturally enjoyed by the symmetric states which have a self--containing interest.
description: 23 pages, juornal reference: Communications in Mathematical Physics, to appear
Design and Comparative Analysis of FRS Architectures for the AI DCT
Creators: name: Onen, Denis
Publisher: name: Graduate Studies
Year: 2013
Subjects: Engineering--Electronics and Electrical

description: Computationally intensive sinusoidal transforms such as the Fast Fourier Transform (FFT) and Discrete Cosine Transform (DCT) play a large role in science and engineering. The DCT has found valuable application in image and video processing. Its broad use has prompted many researchers to seek to improve its computational properties. In the DCT, multiplication by irrational constants has been identified as a source of error, due to the introduction of quantization error. Efforts to overcome this quantization error have led to the relatively recent application of Algebraic Integer (AI) representations, by Dimitrov. The use of AI allows the irrational constants to be encoded, without quantization error. Numbers encoded in AI can be easily operated on by the arithmetic operations of addition, subtraction, and multiplication, all without the introduction of quantization error. A large computational penalty is paid when the AI encoded number, is reconstructed into a single number, using a process known as the Final Reconstruction Step (FRS). This research investigates and develops a large number of novel designs for the FRS, in the application of 2D AI to the 2D DCT. These designs include the application of Multiple Constant Multiplication (MCM) and a substitution method, to reduce the computational complexity of the FRS. These new designs offer a significant improvement in Mean-Squared Error (MSE) and computational complexity, in comparison with standard FRS designs. This research also provides a comprehensive comparative analysis of AI methods versus non-AI methods for the 2D DCT, and finds that non-AI methods are superior to AI in many cases, for the metrics of MSE and computational complexity, despite the significant FRS improvements reported in this thesis. For the case of area-limited designs, this thesis demonstrates the superiority of the AI method over the non-AI method, by the use of a single, multiplexed FRS stage.
Do gauge fields really contribute negatively to black hole entropy?
Creators: name: Donnelly, William
name: Wall, Aron C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Quantum fluctuations of matter fields contribute to the thermal entropy of black holes. For free minimally-coupled scalar and spinor fields, this contribution is precisely the entanglement entropy. For gauge fields, Kabat found an extra negative divergent "contact term" with no known statistical interpretation. We compare this contact term to a similar term that arises for nonminimally-coupled scalar fields. Although both divergences may be interpreted as terms in the Wald entropy, we point out that the contact term for gauge fields comes from a gauge-dependent ambiguity in Wald's formula. Revisiting Kabat's derivation of the contact term, we show that it is sensitive to the treatment of infrared modes. To explore these infrared issues, we consider two-dimensional compact manifolds, such as Euclidean de Sitter space, and show that the contact term arises from an incorrect treatment of zero modes. In a manifestly gauge-invariant reduced phase space quantization, the gauge field contribution to the entropy is positive, finite, and equal to the entanglement entropy.
description: 27 pages
Equine odontoclastic tooth resorption and hypercementosis: Investigating individual incisor disease patterns using radiological classification
Creators: name: Rehrl, Sabine
name: Schulte, Wiebke
name: Staszyk, Carsten
name: Lischer, Christoph
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: equine dentistry
subject: horse
subject: hypercementosis
subject: incisor
subject: resorption
subject: teeth
subject: tooth
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: Background Equine odontoclastic tooth resorption and hypercementosis (EOTRH) is a destructive, painful and underdiagnosed dental disorder. Radiography is necessary to fully assess the disease as early stages occur on clinically normal teeth. Objectives To investigate the distribution pattern of appearance of EOTRH within the incisor arcade. In particular, we aimed to determine the influence of tooth position and horse age on the severity of EOTRH as well as on the frequency of the individual severity stages. Study design Retrospective cross-sectional radiographic case study. Methods Digital radiographs of 142 horses (10 years and older) presented for routine dental examination at our Equine Hospital were obtained and evaluated for changes related to EOTRH. Radiological findings were classified in terms of EOTRH severity, and each tooth was evaluated individually (tooth stage). Results The tooth stages of EOTRH showed a bilateral symmetrical distribution pattern over the entire incisor arcade. There was a significant positive correlation between age and tooth stages (p < 0.001, rho = 0.48, 95% CI 0.43–0.51), and the frequency of higher tooth stages increased from central incisors to middle and corner incisors. Main limitations Individual head anatomy in some male horses lead to superimposition of the lower jaw corner incisors and canine teeth. The radiographic technique proved difficult in smaller and uncooperative horses. Differentiating between mild pathological signs of EOTRH and age-related radiological changes was not possible in all cases. Conclusion These results reconfirm an age-correlated progression of EOTRH. EOTRH affects the incisor arcade in a bilaterally symmetrical pattern with the corner incisors being the most severely affected.
Measuring distances to galaxies with globular cluster velocity dispersions
Creators: name: Beasley, Michael A.
name: Fahrion, Katja
name: Gvozdenko, Anastasia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Accurate distances are key to obtaining intrinsic properties of astronomical objects such as luminosity or size. Globular clusters (GCs) follow a well-defined relation between their absolute magnitudes and internal stellar velocity dispersions ($σ$), offering an independent way to measure distances to their host galaxies via high-resolution spectroscopy. This is reminiscent of the "Faber-Jackson" for elliptical galaxies. However, unlike galaxies, GCs have a very narrow range of mass-to-light ratios and simple star formation histories. Here we show that the GC $M_V - \text{log}_{10}(σ)$ relation is linear, whose slope is identical for the Milky Way and M31 GC systems. Based on this, we use 94 Milky Way GCs which have distances from Gaia parallaxes, or proper-motion dispersion profiles to derive a "GC velocity dispersion" distance (GCVD) to M31, obtaining $(m-M)_0=24.51\pm0.08$ ($d=798\pm28$ kpc), in excellent agreement with independent measurements. Combining data for these two galaxies to create a fiducial relation using 296 GCs with high-quality measurements, we obtain a zeropoint uncertainty ($\pm 0.06$ mag) corresponding to a distance uncertainty of $\sim3\%$. We then use GCVD to obtain a distance to the giant elliptical galaxy NGC\,5128 (Centaurus A), finding $(m-M)_0= 27.95\pm0.09$ ($d=3.89\pm0.16$ Mpc). This is in excellent agreement with, and in some cases more precise than, literature estimates from the tip of the red giant branch or surface brightness fluctuations. We apply GCVD to Local Group galaxies with appropriate data and find good agreement with literature values even in cases with only one GC velocity dispersion measurement.
description: Accepted for publication in MNRAS
Constructed: Building Conceptions
Creators: name: Price, Shane
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Fine Arts
subject: Perception
subject: Enculturation
subject: Art

description: This paper is in support of my thesis exhibition entitled Constructed: Building Conceptions, which was exhibited at the Nickle Galleries at the University of Calgary from the 16th of August 2013 to the 28th of September 2013. In this paper I outline my exhibition Constructed: Building Conceptions, which questions the process through which we perceive and interpret the world around us. Arguing that the social inscriptions that constitute ourselves individually along with our knowledge of the world can also narrow our interpretation of that world. The opinions and judgments that we assign to the world are perceived as being limited to those we have been ascribed socially. Through recounting works completed previously during my Masters of Fine Arts program I contextualize the concerns present in my thesis exhibition within my artistic practice. I will also provide historical context for my practice, by comparing and contrasting my work with the work of other artists.
Authenticity, Teaching Relationships, and Suzuki
Creators: name: Thompson, Merlin
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Education
subject: Education--Music
subject: Education--Philosophy of
subject: Authenticity, Suzuki Method, Teaching Relationships

description: As a teacher mentor, I have observed two types of knowledgeable teachers: teachers who display an instructional ease reflective of the comfort they have with themselves, and teachers who demonstrate an instructional artificiality reflective of the disconnect they have with themselves and their students. What is the difference between these two types of knowledgeable teachers? The difference, I propose, is a matter of authenticity in teaching. My interest in the topic of authenticity originates from my three-year teacher apprenticeship with Dr. Shinichi Suzuki. The problem facing authenticity is that it garners a complete range of favorable and unfavorable reactions. Authenticity is lauded as essential to transformative education. Yet, it is rejected as narcissistic, self-absorbed, and self-entitled. So, is authenticity a good or a bad thing? Would we be better off with or without authenticity? My research investigates authenticity by examining its historical and philosophical roots, its relationship to self-determining freedom, and the contemporary insistence on moral imperatives. I examine authenticity from a perspective of lived experience in order to make meaning. I take advantage of my musical background to investigate the Suzuki Method of music instruction and the phenomenon of musical performance. Furthermore, I propose a repositioning of fear as antagonist, catalyst, and insulation to authenticity. The hermeneutic phenomenological orientation to this research prompts iterative cycles of investigation that serve to uncover authenticity’s bright side and its dark side. Exploration into a Suzuki model of authenticity provides further illumination. Finally, the ideology of stewardship sheds light on the fundamentally nonnegotiable positioning of authenticity in teaching relationships.
A Comprehensive Description of Multi-Term LSM for Applying Multiple a Priori Constraints in Problems of Atmospheric Remote Sensing: GRASP Algorithm, Concept, and Applications
Creators: name: Dubovik, Oleg
name: Fuertes, David
name: Litvinov, Pavel
name: Lopatin, Anton
name: Lapyonok, Tatyana
name: Doubovik, Ivan
name: Xu, Feng
name: Ducos, Fabrice
name: Chen, Cheng
name: Torres, Benjamin
name: Derimian, Yevgeny
name: Li, Lei
name: Herreras-Giralda, Marcos
name: Herrera, Milagros
name: Karol, Yana
name: Matar, Christian
name: Schuster, Gregory L.
name: Espinosa, Reed
name: Puthukkudy, Anin
name: Li, Zhengqiang
name: Fischer, Juergen
name: Preusker, Rene
name: Cuesta, Juan
name: Kreuter, Axel
name: Cede, Alexander
name: Aspetsberger, Michael
name: Marth, Daniel
name: Bindreiter, Lukas
name: Hangler, Andreas
name: Lanzinger, Verena
name: Holter, Christoph
name: Federspiel, Christian
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: inversion method
subject: multiple a priori constraints
subject: atmospheric remote sensing
subject: GRASP algorithm
subject: atmospheric aerosol
subject: 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften

description: Advanced inversion Multi-term approach utilizing multiple a priori constraints is proposed. The approach is used as a base for the first unified algorithm GRASP that is applicable to diverse remote sensing observations and retrieving a variety of atmospheric properties. The utilization of GRASP for diverse remote sensing observations is demonstrated.
Anna Pavlova, danzatrice eurasiana? (I parte)
Creators: name: Mei, Silvia
Publisher: name: Antropologia e Teatro. Rivista di Studi
Year: 2012
Subjects: Mei; Pavlova; Asia; danze tradizionali

description: Abstract – IT Prima diva nella costellazione di nuove star dello spettacolo novecentesco, Anna Pavlova visse unicamente nello spirito e nella missione della danza come forma d’arte e stile di vita. Senza temere i rischi del solipsismo, si lancia nell’avventura di una compagnia tutta sua dopo il clamore parigino dei Ballets Russes. Il suo coraggio, la sua curiosità, il suo genio artistico la portano a viaggiare per i cinque continenti senza sosta, a scoprire danze tradizionali, a praticarle essa stessa, come quelle kabuki, apprese non senza sofferenze in Giappone nel 1922. Presentata nella vulgata come paladina della tradizione classicoaccademica, Pavlova può ostentare una biografia degna delle grandi danzatrici moderne a lei contemporanee, come una Duncan o una Ruth St. Denis (con quest’ultima in rapporto di competizione a distanza intorno al soggetto di Radha). Insieme ad una figura controversa e intrigante come quella del danzatore indiano Uday Shankar, crea un trittico di danze di ispirazione orientale all’insegna del rigore filologico e dell’integrazione linguistica, traccia della sua apertura e del rispetto di tradizioni teatrali altre. Abstract – EN Anna Pavlova, the first diva within the stars firmament of the 20th century, spent her life exclusively in the spirit of dance, intended as an art form and a life style, as if it were a mission. She threw herself into the adventure of leading her own company, after the Ballets Russes' European acclaim. Her courage, curiosity and artistic genius took her through five continents, endlessly searching for traditional dances that she learned with tremendous physical suffering, as in Japan with kabuki in 1922. She’s not simply a paladin of the academic tradition. She can in fact claim a biography and dance practice worthy of the most famous modern dancers who lived in her age, such as Duncan and St. Denis (with whom she was in a special competition, though after years, on the subject of Radha). With Uday Shankar, an interesting Indian “classical” dancer, she made the choreographic triptych Oriental Impressions, that was characterized by a strict philological and synchretic poetry testifying to her opening and respect of different theatrical and cultural traditions.
description: Antropologia e Teatro. Rivista di Studi, N. 1 (2010)
title: Научно-технический прогресс в индустриальных отраслях Сибири в 1960–1980-е гг.
title: Scientific and Technical Progress in Industrial Sectors of Siberia in the 1960s–1980s
Creators: name: Тимошенко, Альбина Ивановна
Publisher: name: Издательский центр СурГУ
Year: 2019

description: В статье анализируются проблемы индустриального развития Сибири. Сделаны выводы о том, что научно-технический прогресс является главным фактором роста сибирской индустрии, а её движение на восток во второй половине 1960-х и в 1980-е гг. было обусловлено индустриальным развитием и потребностью в освоении новых районов с богатыми природными ресурсами в интересах всего народнохозяйственного комплекса СССР.
description: The article analyses the problems of industrial development in Siberia. It is concluded that scientific and technological progress is the main factor in the growth of the Siberian industry, and its eastward movement in the second half of the 1960s and the 1980s was associated with the acceleration of industrial growth and the need for the development of new areas with rich natural resources for the entire national economic complex of the USSR.
The Development of a Self-Build Power Supply Unit to Assess the Challenges and Barriers Associated with Designing a Malaria Diagnostic Detection Device
Creators: name: Prebeau-Menezes, Leif
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Education--Sciences
subject: Human Development
subject: Engineering--Biomedical
subject: Africa
subject: Biomedical Engineering
subject: FOS: Medical engineering
subject: Development
subject: African Development
subject: Power Supply
subject: Malaria
subject: Detection Device
subject: Social Entrepreneurship
subject: Empowerment

description: Malaria remains a serious public health problem across tropical and sub-tropical areas of Africa and around the globe. A potential solution lies in areas of biomedical research such as the development of a Malaria Diagnostic Detection Device (MDDD) and similar Point of Care (POC) devices. These diagnostic devices provide timely results leading to rapid clinical management decisions and patient care. Trials on some high technology POC devices have failed to deliver appropriate diagnostics in Africa due to the lack of availability of portable power utilities, specialized operational and maintenance training, and increasingly sophisticated supporting components, which were not available locally. Therefore, before major investments were made in developing the MDDD, a Self-Build Power Supply Unit (SBPSU) was constructed. It consisted of simple components that could be easily constructed, operated and maintained locally and economically in Ethiopia. The SBPSU replicates were tested and resulted in successfully running gel-electrophoresis units. The construction and replication of the SBPSU was also used to train research participants at the University of Gondar in Ethiopia. The outcome of this research provided an assessment of the requirements for developing the MDDD for use in Ethiopia. The lessons learned were incorporated into the design basis for the MDDD based on Loop mediated isothermal AMPlification (LAMP) assays for an accurate and rapid detection of malaria. It is expected that the implications of this work will foster future international biomedical research collaborations and provide insights for the next generation of POC infectious diseases detection devices.
Identità reali in situazioni di rappresentazione
Creators: name: Masotti, Stefano
Publisher: name: Antropologia e Teatro. Rivista di Studi
Year: 2012
Subjects: Masotti; attore; Amici di Luca; pedagogia; disagio

description: Abstract – IT Una riflessione sulla necessità di considerare la centralità della persona, il lavoro sull'identità reale, sul ri-conoscimento e maggior conoscenza di se stessi, anche nell'ambito del teatro professionistico e non solo con attori-non attori, in cui lo sguardo pedagogico è imprescindibile. Il dubbio che l’approfondimento delle verità personali, della condizione di un corpo che sia sinceramente se stesso, e non simulacro di un personaggio, entri sempre nel gioco della comunicazione teatrale e della credibilità poetica dell’attore contemporaneo. Abstract – EN A reflection about the necessity to consider the centrality of the person, the work on real identity, about re-cognition and best self-knowledge, also in the professional theater and not just with “actors-not actors”, in which the pedagogical look is essential. The doubt that the deepening of personal truth, the condition of a body that is truly himself, and no semblance of a character, always enter in the game of the theater communication and in the poetry credibility of the contemporary actor.
description: Antropologia e Teatro. Rivista di Studi, N. 1 (2010)
Supplementary document for Gratings for multi-resolution edge illumination X-ray phase contrast imaging: concept and simulation - 7442890.pdf
Creators: name: Vanthienen, Pieter-Jan
name: Francken, Nicholas
name: Sanctorum, Jonathan
name: Sijbers, Jan
name: De Beenhouwer, Jan
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Tilt equation, GATE macro and CAD-ASTRA script
The Complexification of Engineering
Creators: name: Maldonado, Carlos Eduardo
name: Gómez-Cruz, Nelson Alfonso
Publisher: name: arXiv
Year: 2011
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper deals with the arrow of complexification of engineering. We claim that the complexification of engineering consists in (a) that shift throughout which engineering becomes a science; thus it ceases to be a (mere) praxis or profession; (b) becoming a science, engineering can be considered as one of the sciences of complexity. In reality, the complexification of engineering is the process by which engineering can be studied, achieved and understood in terms of knowledge, and not of goods and services any longer. Complex engineered systems and bio-inspired engineering are so far the two expressions of a complex engineering.
description: 9 pages, 1 figure, 1 table, preprint; Complexity. In the print (2011)
Neighbourhoods, dogs and walking: An exploration of factors relevant to healthy aging in place
Creators: name: Toohey, Ann Madeline
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Public Health
subject: population health
subject: aging in place
subject: dog walking
subject: neighbourhood
subject: Physical Activity
subject: social engagement
subject: healthy aging

description: The aims of this thesis were to: 1) understand factors related to healthy aging of older adults living in urban environments (i.e., aging in place); and 2) contribute to the evidence-informed case for viewing dogs as contributing to neighbourhoods in ways that may influence healthy aging in place. A scoping review of diverse literatures suggested that dogs may increase physical activity for both dog-owners and non-owners, but that dogs will not have a standard effect across all neighbourhoods. An analysis of data for a sample of older adults (50 yrs and older) living in Calgary, Canada, found that the dog-owners who frequently walked dogs (4 times/wk or more) reported more neighbourhood-based recreational walking and high sense of community relative to non-owners. Interventions promoting dog-walking in neighbourhoods, while supporting the specific walking needs of older adults, may help support healthy aging in place.
Roberto Alonge, Goldoni Libertino. Eros, violenza, morte
Creators: name: Bignami, Paola
Publisher: name: Antropologia e Teatro. Rivista di Studi
Year: 2012
Subjects: Bignami; Alonge; Goldoni; Parigi;

description: Antropologia e Teatro. Rivista di Studi, N. 1 (2010)
Thermal signatures of pairing correlations in nuclei and nano-scale metallic grains
Creators: name: Alhassid, Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Atomic nuclei and nano-scale metallic grains are in the crossover regime of pairing correlations between the bulk limit, where the Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity is valid, and the fluctuation-dominated regime, where BCS theory breaks down. In this fluctuation-dominated regime, the pairing gap is comparable to or smaller than the single-particle mean level spacing. We discuss thermal signatures of pairing correlations in nuclei and ultra-small metallic grains that survive despite the large fluctuations of the pairing field.
description: 22 pages, 8 figures, chapter in "Fifty Years of Nuclear BCS," eds. R.A. Broglia and V. Zelevinsky
Temporally shaped vortex phase laser pulses for two-photon excited fluorescence
Creators: name: Gottschalk, Robin
name: Lindinger, Albrecht
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Two-photon excited fluorescence
subject: Temporally shaped vortex phase laser pulses
subject: Biophotonic applications.
subject: 500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik

description: We report temporally shaped vortex phase laser pulses for two-photon excited fluorescence of dyes. The particularly tailored pulses are generated by first utilizing a temporal pulse shaper and subsequently a two-dimensional spatial pulse shaper. Various vortex phase shaped structures are demonstrated by combining different two-dimensional phase patterns. Moreover, perpendicular polarization components are used to achieve an enhanced radial two-photon excited fluorescence contrast by applying third order phase functions on the temporal pulse shaper. Particularly, the spatial fluorescence structure is modulated with a combination of Gaussian and vortex phase shaped pulses by modifying only the phase on the temporal modulator. Thereby, interference structures with high spatial resolution arise. The introduced method to generate temporally shaped vortex phase tailored pulses will provide new perspectives for biophotonic applications.
Surface reconstructions during growth of GaAs₁-xBix alloys
Creators: name: Masnadi Shirazi Nejad, Mostafa
Publisher: name: University of British Columbia
Year: 2010

description: GaAs₁-xBix is an exciting new semiconductor alloy with numerous promising applications. Incorporation of Bi into GaAs allows for a large reduction of the GaAs bandgap per percent incorporation (7x greater than In, with modest increase in lattice size) and shows strong photoluminescence (PL) and low material degradation associated with Bi. This will allow for longer wavelength devices to be grown on GaAs substrates, than is currently possible with pseudomorphic InGaAs on GaAs. Since Bi has a strong tendency for surface segregation, the molecular beam epitaxy (MBE) growth of GaAs₁-xBix is challenging. To achieve Bi incorporation, this alloy requires unconventional MBE growth conditions such as a low substrate temperature and low As overpressure. The low As:Ga flux ratio also makes Ga and Bi droplet formation a problem. Therefore careful control of growth parameters, especially the As:Ga flux ratio is necessary. In this regard reflection high-energy electron diffraction (RHEED) is used as a crucial tool in locating the optimum growth conditions. The surface reconstruction phase map of GaAs₁-xBix is explored in this study as a function of growth temperature and As:Ga ratio. For comparison, the phase map of GaAs, at low temperatures is also obtained. It is observed that the (1×3), (2×3), (2×4) surface phases are common between GaAs and GaAs₁-xBix but due to the presence of Bi, a new (2×1) reconstruction appears in the case of GaAs₁-xBix. This new reconstruction is observed for various Bi fluxes, showing the evolution of this phase with substrate temperature and As:Ga flux ratio. In addition, the emissivity of the (2×1) surface was found to be lower than for the other As-rich reconstructed surfaces (e.g. (1×3) and (2×3) surfaces) which suggests that the (2×1) surface phase is metallic. Throughout this work, several GaAs₁-xBix films were grown with (1×3) and (2×1) reconstructions at different substrate temperatures. Each film is characterized using high-resolution x-ray diffraction (XRD), photoluminescence spectra (PL) and atomic force microscopy (AFM). Superior crystal quality, higher Bi incorporation and higher intensity PL was observed for GaAs₁-xBix samples grown on (2×1) surfaces, relative to samples grown on (1×3) surfaces.
Classification of Home Network Problems with Transformers
Creators: name: Dötterl, Jeremias
name: Fard, Zahra Hemmati
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We propose a classifier that can identify ten common home network problems based on the raw textual output of networking tools such as ping, dig, and ip. Our deep learning model uses an encoder-only transformer architecture with a particular pre-tokenizer that we propose for splitting the tool output into token sequences. The use of transformers distinguishes our approach from related work on network problem classification, which still primarily relies on non-deep-learning methods. Our model achieves high accuracy in our experiments, demonstrating the high potential of transformer-based problem classification for the home network.
description: This work has been partially funded by the German Federal Ministry of Education and Research (BMBF) in the FRONT-RUNNER project (Grant 16KISR005K)
Paola Bignami - Charlotte Ossicini, Il quadridimensionale instabile - Manuale per lo studio del costume teatrale
Creators: name: Azzaroni, Giovanni
Publisher: name: Antropologia e Teatro. Rivista di Studi
Year: 2012
Subjects: Azzaroni; Bignami; Ossicini; costume teatrale; percezione

description: Antropologia e Teatro. Rivista di Studi, N. 1 (2010)
Superconductivity in the metallic-oxidized magnesium interface
Creators: name: Sidorov, N. S.
name: Palnichenko, A. V.
name: Khasanov, S. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Metastable superconductivity at 39 - 54 K in the interfaces formed by metallic and oxidized magnesium (MgO) has been observed by ac magnetic susceptibility measurements. The superconducting interfaces have been produced by the surface oxidation of metallic magnesium under special conditions.
description: 8 pages, 4 figures; Solid State Communications, 2012
Oxygen Evolution Activity of Amorphous Cobalt Oxyhydroxides: Interconnecting Precatalyst Reconstruction, Long‐Range Order, Buffer‐Binding, Morphology, Mass Transport, and Operation Temperature
Creators: name: Hausmann, J. Niklas
name: Mebs, Stefan
name: Dau, Holger
name: Driess, Matthias
name: Menezes, Prashanth W.
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: cobalt borophosphate precatalysts
subject: cobalt oxyhydoxides
subject: edge sites
subject: (near‐)neutral oxygen evolution reaction
subject: precatalyst reconstructions
subject: proton transport
subject: water oxidation
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Nanocrystalline or amorphous cobalt oxyhydroxides (CoCat) are promising electrocatalysts for the oxygen evolution reaction (OER). While having the same short‐range order, CoCat phases possess different electrocatalytic properties. This phenomenon is not conclusively understood, as multiple interdependent parameters affect the OER activity simultaneously. Herein, a layered cobalt borophosphate precatalyst, Co(H2O)2[B2P2O8(OH)2]·H2O, is fully reconstructed into two different CoCat phases. In contrast to previous reports, this reconstruction is not initiated at the surface but at the electrode substrate to catalyst interface. Ex situ and in situ investigations of the two borophosphate derived CoCats, as well as the prominent CoPi and CoBi identify differences in the Tafel slope/range, buffer binding and content, long‐range order, number of accessible edge sites, redox activity, and morphology. Considering and interconnecting these aspects together with proton mass‐transport limitations, a comprehensive picture is provided explaining the different OER activities. The most decisive factors are the buffers used for reconstruction, the number of edge sites that are not inhibited by irreversibly bonded buffers, and the morphology. With this acquired knowledge, an optimized OER system is realized operating in near‐neutral potassium borate medium at 1.62 ± 0.03 VRHE yielding 250 mA cm−2 at 65 °C for 1 month without degrading performance.
The Rise and Fall of Anomalies in Tetrahedral Liquids
Creators: name: Hujo, Waldemar
name: Jabes, B. Shadrack
name: Rana, Varun K.
name: Chakravarty, Charusita
name: Molinero, Valeria
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The thermodynamic liquid-state anomalies and associated structural changes of the Stillinger-Weber family of liquids are mapped out as a function of the degree of tetrahedrality of the interaction potential, focusing in particular on tetrahedrality values suitable for modeling C, H2O, Si, Ge and Sn. We show that the density anomaly, associated with a rise in molar volume on isobaric cooling, emerges at intermediate tetrahedralities (e.g. Ge, Si and H2O) but is absent in the low (e.g. Sn) and high (e.g. C) tetrahedrality liquids. The rise in entropy on isothermal compression associated with the density anomaly is related to the structural changes in the liquid using the pair correlation entropy. An anomalous increase in the heat capacity on isobaric cooling exists at high tetrahedralities but is absent at low tetrahedralities (e.g. Sn). Structurally, this heat capacity anomaly originates in a sharp rise in the fraction of four-coordinated particles and local tetrahedral order in the liquid as its structure approaches that of the tetrahedral crystal.
description: 41 pages; 6 figures - To appear in the special issue on Water and Associated Liquids of the Journal of Statistical Phyiscs
Ritorno al futuro: memorie, orizzonti e riflessi dell'antropologia. Intervista a Ugo Fabietti
Creators: name: Romaniello, Alfonso
Publisher: name: Antropologia e Teatro. Rivista di Studi
Year: 2012
Subjects: Romaniello; Ugo Fabietti; antropologia; viaggio; relativismo

description: Abstract – IT Più che un’intervista, un incontro/discussione con una delle figure più autorevoli dell’antropologia italiana, il Prof. Ugo Fabietti. Le sue parole, oltre che offrirci notevoli spunti di riflessione su cosa sia e come debba orientarsi oggi l’antropologia, ci accompagnano in un percorso dove riemergono le radici stesse della disciplina: il viaggio, l’incontro con l’alterità culturale, l’epochè, la ricerca sul campo, il relativismo. Uno sguardo sui fondamenti teorici della disciplina, ma anche sulle sue prospettive di applicazione, sul suo riconoscimento sociale ed istituzionale. Il Professor Fabietti, presentandoci l’antropologia come “un mestiere solitario”, ci racconta con passione la ricchezza e gli strumenti che derivano “dall’incontro con l’altro”, e lo fa in un condensato di teoria ed esperienza…che è poi l’humus della disciplina stessa. Abstract – EN More than an interview, this is a meeting/discussion with one of the most important figures of Italian anthropology, Professor Ugo Fabietti. His words offer innumerable points of reflection about what anthropology is, and the direction it should take. They also accompany us along a path in which the roots of anthropology themselves re-emerge: travel, encountering cultural otherness, epochè, fieldwork and relativism. He provides a look at the theoretical structure of the discipline and also its potential applications, at its social and institutional recognition. Professor Fabietti, presenting anthropology as “solitary knowledge”, details with passion the richness and the instruments deriving “from the meeting with the other”. He presents it in an essence of theory and experience… which is after all the quintessence of anthropology itself.
description: Antropologia e Teatro. Rivista di Studi, N. 2 (2011)
Synthetic studies toward 6-deoxy-ß-D-ido-heptopyranosides related to capsular polysaccharides of Campylobacter jejuni
Creators: name: Hevey, Rachel
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Immunology
subject: FOS: Clinical medicine
subject: Chemistry--Organic
subject: Chemistry--Pharmaceutical
subject: Synthesis
subject: carbohydrates
subject: Campylobacter

description: Campylobacter jejuni is a leading cause of bacterial infection resulting in symptoms such as diarrhea, fever, and abdominal cramping. This pathogen is also associated with the development of Guillain-Barré Syndrome, an autoimmune condition that results from the development of antibodies elicited against the bacterial lipopolysaccharides that can cross-react with human gangliosides present on nerve tissue, resulting in neurological complications (e.g. acute paralysis) from immune-mediated destruction of the nervous system. The capsular polysaccharide (CPS) of C. jejuni contains a unique repeating disaccharide unit which includes an unusual idopyranoside (6-deoxy-D-ido-heptose); we hypothesized that re-directing the immune response towards bacterial CPS may potentially decrease the risk of eliciting a harmful autoimmune reaction. Therefore, the primary goal of the thesis was to develop an efficient synthetic method to obtain β-linked idopyranosides which could eventually be incorporated into a CPS-based vaccine against C. jejuni. A method was developed to obtain β-D-idopyranosides via an alkoxide-mediated regio- and stereoselective di-inversion of the C-2 and C-3 centres of 4,6-O-benzylidene-2,3-di-O-sulfonyl-β-D-galactopyranoside (Chapter 2). The method was the first to allow for installation of the challenging β-1,2-cis-linked D-idopyranosyl into oligosaccharides, and enabled access to orthogonally protected substrates. An investigation into the mechanism of the 2,3-di-inversion was performed (Chapter 3), and confirmed that a regioselective O-transsulfonylation at O-3 enabled formation of 2,3-anhydro-talopyranoside, which underwent a trans-diaxial epoxide opening to afford the desired β-D-idopyranoside as the only product. The regioselectivity was attributed to the coordination of a counter-cation to one of the sulfonate oxygens with the help of a neighboring cis-oxygen. The role of the 4,6-O-acetal protecting group in the di-inversion reaction was explored (Chapter 4), and our results indicate that it imposes conformational restraint on the pyranose ring to facilitate O-transsulfonylation and also allows the subsequent opening of the intermediate epoxide to occur at a much improved rate. Finally, homologation of the β-D-idopyranoside at C-6 was studied which enabled access to two analogues of target β-D-ido-heptopyranoside (Chapter 5). Future work will involve the development of efficient methodologies to introduce the 6-deoxy-7-hydroxy functionalities.
Exploring the use of clickers to support active learning and knowledge building by pre-service teachers in large lectures
Creators: name: Liu, Angyue
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Education--Technology
subject: clickers
subject: active learning
subject: knowledge building
subject: Pre-service teachers
subject: large lectures

description: Educators in higher education are being challenged to engage every learner in their learning in large lectures. This case study explored the use of an Audience Response System (i.e., clickers) to engage pre-service teachers in active learning and collaborative knowledge building in a large lecture setting within a Bachelor of Education program. Qualitative and quantitative data was collected from classroom observations, student interviews, the instructor interview, and the student survey. This research found that with the opportunity to respond to clicker questions in lectures, especially to the open-ended text-entry questions, student teachers can be engaged in active learning, and also in the creation, sharing, and promising improvement of their ideas/knowledge as individuals and as a learning community in the large lecture setting. Findings from this study can enrich our understanding about effective strategies of using clickers to improve learning and teaching in large lectures in higher education.
A Detoxification Enzyme for Apis mellifera Newly Characterized by Recombinant Expression: 10-Formyl Tetrahydrofolate Dehydrogenase
Creators: name: Mating, Moritz
name: Sharbati, Soroush
name: Einspanier, Ralf
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Apis mellifera
subject: Varroa destructor
subject: formic acid
subject: detoxification
subject: 10-FTHFDH
subject: apiculture
subject: honey bee (Apis mellifera L.)
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Honeybees are important managed pollinators that perform important ecological and economic functions. In recent decades, the obligate ectoparasite Varroa destructor severely affected survival of honeybees as it either feeds on hemolymph and fat bodies or acts as a vector for viruses. A common treatment against the varroa mite is formic acid, which has been used for many years by beekeepers. This treatment is known to be effective, but the therapeutic index is very narrow. Many beekeepers report negative effects of formic acid on bees, which include damage to brood, worker bee mortality, and queen loss. Little is yet known about the molecular mechanisms of formic acid detoxification in honeybees. Our previous study shows the upregulation of predicted 10-formyl tetrahydrofolate dehydrogenase (10-FTHFDH) transcripts in honeybees exposed to formic acid. Here, the predicted honeybee-specific 10-FTHFDH is recombinantly expressed, and its hydrolase and dehydrogenase activities are investigated. As a result, the enzyme shows similar dehydrogenase activity in comparison to known 10-FTHFDHs. This study provides further knowledge to better understand the detoxification mechanisms of formic acid in Apis mellifera.
On calculation of cross sections in Lorentz violating theories
Creators: name: Rubtsov, Grigory
name: Satunin, Petr
name: Sibiryakov, Sergey
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a systematic approach to the calculation of scattering cross sections in theories with violation of the Lorentz invariance taking into account the whole information about the theory Lagrangian. As an illustration we derive the Feynman rules and formulas for sums over polarizations in spinor electrodynamics with Lorentz violating operators of dimensions four and six. These rules are applied to compute the probabilities of several astrophysically relevant processes. We calculate the rates of photon decay and vacuum Cherenkov radiation along with the cross sections of electron-positron pair production on background radiation and in the Coulomb field. The latter process is essential for detection of photon-induced air showers in the atmosphere.
description: 23 pages, 1 figure
“Partners in Change”: An Analysis of the 2011 B.C. Liberal Leadership Contest
Creators: name: Loewen, Brett Allen
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: History--Canadian
subject: Political Science
subject: FOS: Political science
subject: British Columbia
subject: Liberal Party
subject: Christy Clark
subject: Social Credit
subject: leadership selection
subject: weighted-constituency
subject: Gordon Campbell

description: This thesis will analyze the weighted-constituency method of party leadership selection, using the 2011 B.C. Liberal leadership race as a case study. After reviewing literature on Canadian and British Columbian leadership selection and media reports of the 2011 race, it will utilize constituency-level data to analyze the support bases of each candidate, confirming and challenging existing theories about weighted-constituency contests and British Columbian politics. Regarding weighted-constituency contests, it will argue that the endorsements of political elites are advantageous to leadership candidates; that candidates do not need broad geographic support to succeed; and that candidates with narrow support bases can cooperate to find success. Regarding British Columbian politics, it will argue that regionalism is important; that leadership researchers should employ a broader definition of endorsements; that leadership candidates can mount effective campaigns from outside the caucus; and that ethnicity and immigrant status are variables worthy of future research.
O'ZBEKISTON IQTISODIYOTIDA TARKIBIY O'ZGARISHLARNI AMALGA OSHIRISHNING YO'NALISHLARI
Creators: name: Boboyeva, Shohida
Publisher: name: Zenodo
Year: 2023

description: Oʻrta Osiyodagi dengizga chiqish imkoniga ega boʻlgan Oʻzbekiston oʻz iqtisodiyotida sezilarli tarkibiy oʻzgarishlarni boshdan kechirmoqda. Ushbu o'zgarishlar mamlakatning iqtisodiy manzarasini o'zgartirish va diversifikatsiya qilishga qaratilgan aniq yo'nalishni hisobga olgan holda amalga oshirildi. Ushbu maqola ko'rsatmada aytib o'tilganidek, muayyan yozish uslublariga rioya qilgan holda ushbu maqsadlarga erishish uchun ko'rilgan turli xil choralarni ko'rib chiqadi.
title: The CO2 impact of long-haul flights
Creators: name: Vahrenkamp, Richard
Publisher: name: KOBRA Universität Kassel
Year: 2025
Subjects: subject: CO2 impact
subject: airport Frankfurt
subject: long-haul flights
classificationCode: 330
subject: 330
classificationCode: 500
subject: 500
classificationCode: Flughafen Frankfurt (Frankfurt am Main)
subject: Flughafen Frankfurt (Frankfurt am Main)
classificationCode: Kohlendioxidemission
subject: Kohlendioxidemission
classificationCode: Langstreckenflug
subject: Langstreckenflug

description:
At the example of the flight schedule of airport Frankfurt for the day 6 January 2025 the paper shows the high CO2 impact of long-haul flights compared to short range flights and medium range flights.