cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Observations on the mobilization of strength in reinforced soil structures
Creators: name: Quinteros, Vicente Santiago
Publisher: name: University of British Columbia
Year: 2015

description: Confidence in the design of reinforced retaining structures is based on a limited body of experimental field data from performance monitoring of a relatively small number of case studies. In order to improve upon that confidence in design, this research addresses the back-analysis of the only field study involving a reinforced steep slope with independent measurements of tensile force and strain, which was first described by Fannin & Hermann (1990). Knowing the mobilized strength in the reinforcement, a back-analysis was performed using widely accepted design practice, with the purpose of establishing the mobilized angle of friction within the backfill soil of the structure. The mobilized friction angle was compared with the findings of laboratory shear strength tests in direct shear, triaxial and plane-strain conditions. The comparison provides further evidence in support of the expectation that plane-strain conditions prevail within the reinforced steep slope, and the recommendation in the British code of practice to use the peak friction angle for design. Additionally, visual inspection and index testing on exhumed geogrid samples from the structure described by Fannin & Hermann (1990) established that the geogrid has experienced no major physical damage, nor any significant degradation associated with durability of the polymer material. Moreover, rapid loading creep tests data show excellent agreement between exhumed and typical values, implying no significant durability degradation in the geogrid of the Skedsmo structure. Accordingly, isochronous load-strain-time data can be used with confidence for predicting the long-term strain of geogrid reinforced soil structures.
Design, Synthese und Charakterisierung neuer Sirtuin Inhibitoren
Creators: name: Kalbas, Diana
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 572

description: SIRTUINE sind NAD+-abhängige Protein-Deacelasen, die als zentrale Signalproteine in physiologischen Funktionen, sowie altersbedingten und metabolischen Erkrankungen fungieren. Daher sind SIRTUINE interessante Ziele für Medikamente. Es konnte gezeigt werden, dass 3-Aryl-Mercapto-succinylierte Derivate selektive SIRT5-Inhibitoren mit niedrigen Ki-Werten im nM Bereich sind. Außerdem wurden spezifische und hochpotente 3-Aryl-Mercapto-butyryl-SIRT2-Inhibitoren mit niedrigen nM Ki-Werten generiert. Als Ergebnis kinetischer Experimente wurde eine Änderung des Bindungsmodus in Abhängigkeit von der Länge der Acylkette entdeckt. 3-Aryl-Mercapto-nonalyl- oder Palmitoyl Derivate ändern den Bindungsmodus im aktiven Zentrum von SIRT2, der sowohl den hydrophoben Kanal durch die lange Acylkette als auch die Nikotinamidtasche durch die 3-Aryl-Mercapto-Einheit blockiert. Diese Ergebnisse wurden durch Oberflächenplasmonenresonanzspektroskopie, Microscale Thermophorese und Computerstudien bestätigt.
description: Sirtuins are NAD+-dependent protein deacelases that act as central signaling proteins in physiological functions are attractive drug targets for aging-related and metabolic diseases. We were able to show that 3 aryl mercapto succinylated peptide derivatives yield selective SSIRT5 inhibitors with low nM Ki-values. We also generated specific and highly potent 3 aryl mercapto butyryl SIRT2 Inhibitors with affinities in the low nM range. As a result of kinetic experiments we discovered a change in the binding mode depending on the length of the acyl chain 3 aryl mercapto nonalyl or palmitoyl derivatives are characterized by a switch in the binding mode blocking both the hydrophobic channel by the fatty acyl chain and the nicotinamide pocket by the 3 aryl mercapto moiety. These findings were corroborated by surface plasmon resonance, micro-scale thermophoresis and computer studies.
Mesh Saliency Detection Using Convolutional Neural Networks
Creators: name: Nousias, Stavros
name: ARVANITIS, GERASIMOS
name: Lalos, Aris
name: Moustakas, Konstantinos
Publisher: name: Zenodo
Year: 2020

description: This resource contains the presentation of the paper entitled "Mesh Saliency Detection Using Convolutional Neural Network" with DOI 10.1109/ICME46284.2020.9102796 that took place in 2020 IEEE International Conference on Multimedia and Expo (ICME).

The paper is proposing the use of convolutional neural networks to extract mesh saliency, a visual metric that has been widely considered as the measure of visual importance of certain parts of 3D geometries. Salient parts are distinguishable from their surroundings, with respect to human visual perception. 

The proposed architecture is trained with saliency maps constructed with a fusion spectral and geometrical analysis generated measures. Extensive evaluation studies carried out, include visual perception evaluation, simplification and compression use cases.

As a result, they verify the superiority of our approach as compared to other state-of-theart approaches. Furthermore, performance experiments indicate that CNN-based saliency extraction method is much faster in large and dense geometries allowing its application in low-latency and energy-efficient systems
Growth and thermal decomposition of metal-halide perovskite thin films analyzed by in situ X-ray diffraction
Creators: name: Burwig, Thomas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 530

description: Metal-halide perovskites (MHPs) have seen an ever-increasing attention in view of their potential use as optoelectronic semiconductors. Due to MHPs being a relatively new technology, there is still an abundance of open questions, especially relating to their stability and how this and other properties are related to the conditions of their preparation. Most current day research on MHP thin films focuses on spin-coating as the method of preparation, which leaves gaps in knowledge regarding the growth and characteristics of MHPs which were prepared using other methods. This work aims to provide insights into the preparation and properties of a large variety of MHP thin films prepared via physical vapor deposition in a high vacuum chamber. A key element of the analytical setup used in this work is an in situ X-ray diffraction system. It allows for a relation of variations in process parameters to changes of the involved crystal phases, for example during growth and thermal decomposition.
description: Metall-Halid-Perowskite (MHPs) gewinnen als optoelektronische Halbleiter zunehmend an Aufmerksamkeit. Da MHPs eine sehr junge Technologie sind, gibt es eine Reihe von offenen Fragen, insbesondere bezüglich ihrer Stabilität und wie sich die Bedingungen ihrer Präparation auf diese und andere Eigenschaften auswirken. Die heutige Forschung an MHP-Dünnschichten konzentriert sich auf das Spin-Coating als Herstellungsmethode, was Wissenslücken bezüglich des Wachstums und der Charakteristiken von MPHs hinterlässt, bei denen andere Methoden zum Einsatz kamen. Diese Arbeit hat zum Ziel, Einsichten in die Präparation und Eigenschaften von MHP-Dünnschichten zu schaffen, welche über physikalische Gasphasenabscheidung in einer Hochvakuumkammer hergestellt wurden. Dabei kommt ein in situ Röntgenbeugungssystem zum Einsatz, welches erlaubt, Zusammenhänge zwischen den Prozessparametern und Änderungen der Kristallphasen herzustellen, zum Beispiel während des Wachstums und der thermischen Zersetzung.
Does the Borexino experiment have enough resolution to detect the neutrino flavor day-night asymmetry?
Creators: name: Aleshin, S. S.
name: Kharlanov, O. G.
name: Lobanov, A. E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Earth's density distribution can be approximately considered piecewise continuous at the scale of two-flavor oscillations of neutrinos with energies about 1 MeV. This quite general assumption appears to be enough to analytically calculate the day-night asymmetry factor. Using the explicit time averaging procedure, we show that, within the leading-order approximation, this factor is determined by the electron density immediately before the detector, i.e. in the Earth's crust. Within the approximation chosen, the resulting asymmetry factor does not depend either on the properties of the inner Earth's layers or on the substance and the dimensions of the detector. For beryllium neutrinos, we arrive at the asymmetry factor estimation of about $-4 \times 10^{-4}$, which is at least one order of magnitude beyond the present experimental resolution, including that of the Borexino experiment.
description: 16 pages, 3 figures; Talk given at the 17th International Seminar on High Energy Physics "QUARKS'2012" (Yaroslavl, Russia, June 4-10, 2012); to appear in the Proceedings volume
Detecting positive correlations in a multivariate sample
Creators: name: Arias-Castro, Ery
name: Bubeck, Sébastien
name: Lugosi, Gábor
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We consider the problem of testing whether a correlation matrix of a multivariate normal population is the identity matrix. We focus on sparse classes of alternatives where only a few entries are nonzero and, in fact, positive. We derive a general lower bound applicable to various classes and study the performance of some near-optimal tests. We pay special attention to computational feasibility and construct near-optimal tests that can be computed efficiently. Finally, we apply our results to prove new lower bounds for the clique number of high-dimensional random geometric graphs.
description: Published at http://dx.doi.org/10.3150/13-BEJ565 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Addenda a "El Tetraedro del Derecho. Aportes para una Teoría General del Derecho Privado Trialista"
Creators: name: Banchio, Pablo Rafael
Publisher: name: Zenodo
Year: 2018
Subjects: Teoría General del Derecho, Filosofía del Derecho, Derecho Privado, Tetraedro

description: Se incorporan a la Tesis de Doctorado en Derecho con orientación en Derecho Privado “El tetraedro del Derecho. Aportes para una Teoría General del Derecho Privado” la validez de los métodos filosóficos utilizados y datos empíricos que sustentan los postulados de la tesis en torno al requerimiento de respuestas jurídicas anticipatorias de un modelo de estrategia jurídica ante la inflación conceptual y fáctica de modelos desbordantes de la Posmodernidad frente al Derecho y sus nuevos requerimientos. Manteniendo la idea del aporte a la Teoría Trialista desde la iusfilosofía se toman repartos del pasado, del presente y su carácter indicativo del hoy hacia el porvenir integrando la dimensión temporal a los repartos, normas y realización del valor justicia sobre todo para reconocer los alcances de las potencias e impotencias que se adjudican, en gran medida al ámbito de los intereses presentes y quiénes son los seres humanos que se benefician y se perjudican en una realidad social futura que le permita responder al Derecho con su mantenimiento o modificación a través de consideraciones de valor en un modelo de estrategia juridica. Se agregan los datos empíricos como notas aclaratorias para no modificar la estructura de la Tesis por dos razones: es una tesis de Filosofía del Derecho que no puede quedar limitada a un contexto temporal puntual ya que condicionaría su proyección teórica futura al quedar desactualizados los puntos de referencia incidentales que se incluyan a los postulados teóricos.
The Cotton tensor and the Ricci flow
Creators: name: Mantegazza, Carlo
name: Mongodi, Samuele
name: Rimoldi, Michele
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We compute the evolution equation of the Cotton and the Bach tensor under the Ricci flow of a Riemannian manifold, with particular attention to the three dimensional case, and we discuss some applications.
description: 28 pages
Environment-Dependent Fundamental Physical Constants in the Theory of General Inconstancy
Creators: name: Terazawa, Hidezumi
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: A theory of special inconstancy, in which some fundamental physical constants such as the fine-structure and gravitational constants may vary, is proposed in pregeometry. In the special theory of inconstancy, the α-G relation of α=3π/[16ln(4π/5GM_W^2)] between the varying fine-structure and gravitaional constants (where M_W is the charged weak boson mass) is derived from the hypothesis that both of these constants are related to the same fundamental length scale in nature. Furthermore, it leads to the prediction of dot{α}/α=(-0.8\pm2.5)\times10^{-14}yr^{-1} from the most precise limit of dot{G}/G=(-0.6\pm2.0)\times10^{-12}yr^{-1} by Thorsett, which is not only consistent with the recent observation of dot{α}/α=(0.5\pm0.5)\times10^{-14}yr^{-1} by Webb et al. but also feasible for future experimental tests. Also a theory of general inconstancy, in which any fundamental physical constants may vary, is proposed in "more general relativity", by assuming that the space-time is "environment-dependent". In the general theory of inconstancy, the G-Λ relation between the varying gravitational and cosmological constants is derived from the hypothesis that the space-time metric is a function of τ, the "environment-coodinate", in addition to x^μ, the ordinary space-time coodinates. Furthermore, it leads to the prediction of the varying cosmological constant, which is consistent with the present observations. In addition, the latest observation of spatial variation in the fine-structure constant from VLT/UVES of (1.1\pm 0.2)\times 10^{-6}GLyr^{-1} by King et al. is suggested to be taken as a clear evidence for environment-dependent fundamental physical constants
description: 15 pages, a contribution presented at the XXI International Seminar on Nonlinear Phenomena in Complex Systems, Minsk, Belarus, May 20-23, 2014, in the Proceedings, edited by L.F.Babichev, V.I.Kuvshinov, and V.A.Shaparau (National Academy of Sciences of Belarus, Minsk, Belarus, 2014), Nonlinear Dynamics and Applications 20, 241(2014)
Synthese, Charakterisierung und Nachweis neuartiger Maillard-Proteinmodifikationen
Creators: name: Eggen, Michael Dominik
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 540

description: Die Prozessierung von Lebensmitteln führt zu irreversiblen Proteinmodifikationen, welche als Advanced Glycation End Products (AGEs) bezeichnet werden. Insbesondere Kondensationsreaktionen von Lysin- und Arginin-Seitenketten von Proteinen mit kurzkettigen Dicarbonylen, welche beim Zubereiten von Lebensmitteln z.B. aus dem Abbau von Kohlenhydraten oder Lipiden hervorgehen, stellen hierbei die zugrundeliegenden Bildungsmechanismen dieser nicht-enzymatischen Proteinmodifikationen dar. Das Ziel der vorliegenden Arbeit war es, das Verständnis der nicht-enzymatischen Proteinmodifikationen in Lebensmitteln zu erweitern. Hierfür wurden neuartige Proteinmodifikationen strukturell aufgeklärt und in einfachen Modellsystemen sowie in Lebensmitteln quantifiziert. Daneben wurden verschiedenste analytische Methoden entwickelt, um eine Vielzahl von Proteinmodifikationen sowie Intermediate als auch Präkursoren der Maillard-Reaktion in gebackenen Waffeln als auch in gebratenem Fleisch zu quantifizieren.
description: During the processing of food, irreversible protein modifications occur, which are referred to as Advanced Glycation End Products (AGEs). In particular, condensation reactions of lysine and arginine side chains of proteins with short-chain dicarbonyl compounds, which result from the degradation of carbohydrates and lipids, are the underlying formation mechanisms of these non-enzymatic protein modifications. The aim of the present work was to increase the knowledge about the non-enzymatic protein modifications in foods. For this purpose, novel protein modifications were synthesized, structurally elucidated, and quantitated in both simple model systems and foods. In addition, various analytical methods have been developed to quantify a variety of protein modifications as well as intermediates and precursors of the Maillard reaction during the baking of wafers and grilling of meat.
Anne Kleesmendi välipäevik nr 37
Creators: name: Kleesment, Anne-Liis
Publisher: name: Tallinna Tehnikaülikooli Geoloogia Instituut
Year: 1985
Subjects: Eesti
Võhandu jõgi
Läti
Gauja jõgi
Devon
paljandid

description: Devoni läbilõike kirjeldus Võhandu ja Gauja jõe paljandites.
On selective formation and transformation of amorphous solid and hydrate crystals
Creators: name: Kim, Jungsuk
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 660

description: Crystallization technology for preparing desired solid forms for compounds with amorphous and crystalline forms is a challenging task in the chemical and pharmaceutical sectors. In particular, in order to grasp the screening of solid forms, the complex kinetics of nucleation, growth, dissolution and transformation must be studied. This work systematically studied on the selective production of the solid forms including amorphous and crystalline solids based on the thermodynamic properties, supersaturation, metastable limit, transformation kinetics, polymorph formation and screening strategy. It is possible to obtain selectively the solid forms by referring to the supersaturation and solubility data. It could also guide the screening of new polymorphs, the control and development of solid forms. This can provide the proposed strategy for screening solid forms in the production of solids in the solid chemical industry and contribute to the advancement of the quality of solid products.
description: Das Entstehen und Modifizieren von metastabilen Solvaten (Hydraten) oder auch Polymorphen stellt in der chemischen und pharmazeutischen Industrie ein großes Problem dar. Die Arbeit ist hierzu in Fallstudien an Hand des Stoffsystems "disodium guanosine 5'-monophosphate" (GMP) angegangen worden. Es können neben der amorphen Modifikation je nach Herstellungsweg auch ein Heptahydrat und ein Tetrahydrat erzeugt werden. Das Erzeugen erfolgt über ein "Anti-solvent-Kristallisationsverfahren". Es konnte so aufgezeigt und verfolgt werden, in welchen Schritten die Umwandlung in die jeweilige stabilere Modifikation verläuft. Die Fenster der Umwandlungen können so bestimmt und genutzt, bzw. vermieden werden. Aus der Fallstudie ist ein allgemeines Vorgehen für die Erfassung, Kontrolle, bzw. Nutzung oder Vermeidung dieser Art der Umwandlungen von Solvaten oder Polymorphen auch in laufenden Prozesssen mit den on-line, in-line-Techniken abgeleitet worden.
Generalization of Rindler Potential at Cluster Scales in Randers-Finslerian Spacetime: a Possible Explanation of the Bullet Cluster 1E0657-558?
Creators: name: Chang, Zhe
name: Li, Ming-Hua
name: Lin, Hai-Nan
name: Li, Xin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The data of the Bullet Cluster 1E0657-558 released on November 15, 2006 reveal that the strong and weak gravitational lensing convergence $κ$-map has an $8σ$ offset from the $Σ$-map. The observed $Σ$-map is a direct measurement of the surface mass density of the Intracluster medium(ICM) gas. It accounts for 83% of the averaged mass-fraction of the system. This suggests a modified gravity theory at large distances different from Newton's inverse-square gravitational law. In this paper, as a cluster scale generalization of Grumiller's modified gravity model (D. Grumiller, Phys. Rev. Lett. 105, 211303 (2010)), we present a gravity model with a generalized linear Rindler potential in Randers-Finslerian spacetime without invoking any dark matter. The galactic limit of the model is qualitatively consistent with the MOND and Grumiller's. It yields approximately the flatness of the rotational velocity profile at the radial distance of several kpcs and gives the velocity scales for spiral galaxies at which the curves become flattened. Plots of convergence $κ$ for a galaxy cluster show that the peak of the gravitational potential has chances to lie on the outskirts of the baryonic mass center. Assuming an isotropic and isothermal ICM gas profile with temperature $T=14.8$ keV (which is the center value given by observations), we obtain a good match between the dynamical mass $M_\textmd{T}$ of the main cluster given by collisionless Boltzmann equation and that given by the King $β$-model. We also consider a Randers+dark matter scenario \textbf{and a $Λ$-CDM model} with the NFW dark matter distribution profile. We find that a mass ratio $η$ between dark matter and baryonic matter about 6 fails to reproduce the observed convergence $κ$-map for the isothermal temperature $T$ taking the observational center value.
description: 27 pages, 9 figures, 2 tables
Understanding the factors that drive firm-level transformations in the BC forest sector
Creators: name: Madero, Alvaro
Publisher: name: University of British Columbia
Year: 2014

description: Today’s changing business environments pose challenges for British Columbian forest firms in sustaining long-term competitive advantages. In response to these challenges, forest firms can initiate complex transformation processes that seek to project their performance out of a conventional competition cycle. Of interest for multiple stakeholders are the questions of why these transformations ultimately occur, which type of changes can produce them, and how they can be implemented. This exploratory research focuses on analyzing the opinions of senior executives of BC forest businesses about the transforming processes of their firm. Understanding the views of these executives is one of the fundamental pieces of making sense of the forest business transformations. Semi-structured interviews provide the data collection strategy to elicit executives’ views and preferences for adopting different transformational strategies and new product portfolios. Analyses of the transcribed interviews reveal that executives associate firm-level transformations with the execution of seven different business strategies. The findings suggest a firm-specific pattern in defining the transformation processes. Differences in framing the concept of firm-level transformations are linked to differences in the types of changes considered transformative by executives in different firms. Correspondingly, executives’ preferences about adopting new product offerings in their firms also varied from one company to another, but were similar between executives from the same company. The firm-specific defining pattern is explained by a moderating role of the organizational culture of forest firms. The business culture of these companies can regulate executives’ intentions to transform the firm and the decision-making processes aimed at selecting the transformational strategies. The leadership style, ownership structure and the organizational values are elements explaining the business culture of the BC forest firms. Results also uncover a number of forces that can trigger transformation processes in BC forest firms from the perspectives of the executives. The findings also reveal barriers to transformational change and a set of factors that facilitate the implementation of the transformation processes. To further understand the views of executives about firm level transformations, future studies would likely benefit from the decision-making model and the set of research questions drawn from the findings of this exploratory research.
Funktionalisierung von Oberflächenbeschichtungen auf Basis von Polyelektrolyt-Multischichtsystemen für die Stimulierung der osteogenen Stammzelldifferenzierung
Creators: name: Husteden, Catharina
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Polyelektrolyt-Multischichtsysteme bieten vielversprechende Möglichkeiten für die Entwicklung innovativer Strategien in der Therapie von Knochendefekten. Besonders eignen sich dafür nanostrukturierte Oberflächenbeschichtungen von Knochenersatzmaterialien unter Verwendung der Layer-by-Layer-Technik, denen durch gezielte Funktionalisierung das intrinsische Potenzial verliehen wird, in situ zelluläre Regenerationsmechanismen zu stimulieren. Im Rahmen der Dissertation wurden dafür die folgenden Konzepte untersucht: 1) Lipid/DNA-Komplexe (Lipoplexe) wurden für die Funktionalisierung von Polyelektrolyt-Multischichtsystemen eingesetzt, die für das osteoinduktive Protein BMP-2 kodieren und dieses in situ an humanen mesenchymalen Stammzellen exprimieren können. 2) Eine Funktionalisierung erfolgte mit Liposomen, die das osteoinduktive Arzneimittel Dexamethason enthalten und in der Lage sind, die Differenzierung von mesenchymalen Stammzellen zu Osteoblasten zu stimulieren.
description: Polyelectrolyte Multilayer Systems offer promising opportunities for the development of innovative strategies in bone defect therapy. Nanostructured surface coatings on bone substitute materials, utilizing the Layer-by-Layer technique, can be strategically functionalized to unlock their intrinsic potential for stimulating in situ cellular regeneration mechanisms. Within the scope of this dissertation, two key concepts were explored: 1) Lipid/DNA complexes (lipoplexes) were employed for functionalizing polyelectrolyte multilayer systems encoding the osteoinductive protein BMP-2. These systems enable in situ expression of BMP-2 by human mesenchymal stem cells. 2) Functionalization was also achieved using liposomes containing the osteoinductive drug Dexamethasone, capable of stimulating the differentiation of mesenchymal stem cells into osteoblasts.
Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results
Creators: name: Besak, Denis
name: Bodeker, Dietrich
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The thermal production of relativistic right-handed Majorana neutrinos is of importance for models of thermal leptogenesis in the early Universe. Right-handed neutrinos can be produced both by 1 2 decay or inverse decay and by 2 -> 2 scattering processes. In a previous publication, we have studied the production via 1 2 (inverse) decay processes. There we have shown that multiple scattering mediated by soft gauge boson exchange also contributes to the production rate at leading order, and gives a strong enhancement. Here we complete the leading order calculation by adding 2 -> 2 scattering processes involving either electroweak gauge bosons or third-generation quarks. We find that processes with gauge interactions give the most important contributions. We also obtain a new sum rule for the Hard Thermal Loop resummed fermion propagator.
description: 27 pages, 7 figures. Error in the matrix element for the (subdominant) subprocess with s-channel fermion exchange corrected. This changes the corresponding phase space integral and the constant c_V. Numerically it increases the total 2 -> 2 rate by about 2 percent and the complete rate by about 1 percent. The main results and conclusions are unaffected
Rapid Overlay Builder for Xilinx FPGAs
Creators: name: Yue, Xi
Publisher: name: University of British Columbia
Year: 2014

description: A field-programmable gate array (FPGA) is a type of programmable hardware, where a logic designer must create a specific hardware design and then "compile" it into a bitstream that "configures" the device for a specific function at power-up. This compiling process, known as place-and-route (PAR), can take hours or even days, a duration which discourages the use of FPGAs for solving compute-oriented problems. To help mitigate this and other problems, overlays are emerging as useful design patterns in solving compute-oriented problems. An overlay consists of a set of compiler-like tools and an architecture written in a hardware design language like VHDL or Verilog. This cleanly separates the compiling problem into two phases: at the front end, high-level language compilers can quickly map a compute task into the overlay architecture, which is now serving as an intermediate layer. Unfortunately, the back-end of the process, where an overlay architecture is compiled into an FPGA device, remains a very time-consuming task. Many attempts have been made to accelerate the PAR process, ranging from using multicore processors, making quality/runtime tradeoffs, and using hard macros, with limited success. We introduce a new hard-macro methodology, called Rapid Overlay Builder, and demonstrate a run-time improvement up to 22 times compared to a regular unaccelerated flow using Xilinx ISE. In addition, compared to prior work, ROB continues to work well even with high logic utilization levels of 89%, and it consistently maintains high clock rates. By applying this methodology, we anticipate that overlays can be implemented much more quickly and with lower area and speed overheads than would otherwise be possible. This will greatly improve the usability of FPGAs, allowing them to be used as a replacement for CPUs in a greater variety of applications.
El Tetraedro del Derecho. Aportes para una Teoría General del Derecho Privado Trialista
Creators: name: Banchio, Pablo Rafael
Publisher: name: Zenodo
Year: 2018
Subjects: Teoría General del Derecho, Filosofía del Derecho, Derecho Privado, Trialismo, Justicia

description: Frente al cambio de Era de la Historia, donde tiempo y espacio se han comprimido y grandes transformaciones disruptivas exigen al Derecho respuestas dinámicas para situaciones antes ni siquiera imaginables, la norma, anclada a un pasado silogístico de subsunción y siempre posterior a la realidad del cambio, mantiene a nuestra disciplina a la retaguardia de los mismos perdiendo el protagonismo cultural que el Derecho ha mantenido desde los orígenes de la civilización occidental, cuya culminación es la actual Posmodernidad, especialmente en atención a la justicia, valor propio del mundo jurídico. Si bien el espacio ya fue relativamente incorporado por una de las ramas de la Teoría General, el tiempo, hasta ahora, solo como transcurso lineal del pasado y no dinámico de cambio presente ni predictivo de futuro. El common law mas cercano a la realidad que a la abstracción de la captación normativa propone modelos para ello, pero nuestro Sistema Romano requiere su integración fáctica dentro de la Teoría General del Derecho. Para producir la misma en esta Tesis tomamos de las ciencias llamadas “duras”, física y geometría, el concepto del tiempo cuántico y la figura del sólido platónico -Capitulo Uno- y consideramos demostrar metodológicamente lo que afirmamos -Capítulo Dos-, armonizándolo con el trialismo, marco teórico adoptado, que integra la realidad, la norma y la justicia del Mundo Jurídico -Capítulo Tres- desde los origines griegos de nuestra civilización, compartidas por ambos sistemas jurídicos occidentales -Capítulos Cuatro y Cinco-, hasta la actualidad con la estrategia jurídica prospectiva de los desarrollos trialistas -Capitulo Seis-, que el tiempo “lineal” nos permite incorporar el tiempo “futuro” a una Teoría General común y abarcativa, tomando los indicadores del presente, con proyecciones futuras para esa justicia objetiva de llegada para un mundo mejor como una aplicación a la realidad desde el Derecho -Capítulo Siete-.
Lazarsfeld-Mukai bundles and applications
Creators: name: Aprodu, Marian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We survey the development of the notion of Lazarsfeld-Mukai bundles together with various applications, from the classification of Mukai manifolds to Brill-Noether theory and syzygies of $K3$ sections. To see these techniques at work, we present a short proof of a result of M. Reid on the existence of elliptic pencils.
description: updated presentation, updated references, small correction on page 6. I. Peeva (ed.), Commutative Algebra: Expository Papers Dedicated to David Eisenbud on the Occasion of His 65th Birthday, Springer Science+Business Media New York 2013
Parameterized Picard-Vessiot extensions and Atiyah extensions
Creators: name: Gillet, Henri
name: Gorchinskiy, Sergey
name: Ovchinnikov, Alexey
Publisher: name: arXiv
Year: 2011
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: Classical Analysis and ODEs (math.CA)
subject: Category Theory (math.CT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 12H05, 12H20, 13N10, 20G05, 20H20, 34M15

description: Generalizing Atiyah extensions, we introduce and study differential abelian tensor categories over differential rings. By a differential ring, we mean a commutative ring with an action of a Lie ring by derivations. In particular, these derivations act on a differential category. A differential Tannakian theory is developed. The main application is to the Galois theory of linear differential equations with parameters. Namely, we show the existence of a parameterized Picard-Vessiot extension and, therefore, the Galois correspondence for many differential fields with, possibly, non-differentially closed fields of constants, that is, fields of functions of parameters. Other applications include a substantially simplified test for a system of linear differential equations with parameters to be isomonodromic, which will appear in a separate paper. This application is based on differential categories developed in the present paper, and not just differential algebraic groups and their representations.
description: 90 pages, minor corrections
T-duality in the weakly curved background
Creators: name: Davidović, Lj.
name: Sazdović, B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the closed string propagating in the weakly curved background which consists of constant metric and Kalb-Ramond field with infinitesimally small coordinate dependent part. We propose the procedure for constructing the T-dual theory, performing T-duality transformations along coordinates on which the Kalb-Ramond field depends. The obtained theory is defined in the non-geometric double space, described by the Lagrange multiplier $y_μ$ and its $T$-dual $\tilde{y}_μ$. We apply the proposed T-duality procedure to the T-dual theory and obtain the initial one. We discuss the standard relations between T-dual theories that the equations of motion and momenta modes of one theory are the Bianchi identities and the winding modes of the other.
Causal structure of the entanglement renormalization ansatz
Creators: name: Bény, Cédric
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the multiscale entanglement renormalization ansatz (MERA) can be reformulated in terms of a causality constraint on discrete quantum dynamics. This causal structure is that of de Sitter space with a flat spacelike boundary, where the volume of a spacetime region corresponds to the number of variational parameters it contains. This result clarifies the nature of the ansatz, and suggests a generalization to quantum field theory. It also constitutes an independent justification of the connection between MERA and hyperbolic geometry which was proposed as a concrete implementation of the AdS-CFT correspondence.
Perturbation analysis of Poisson processes
Creators: name: Last, Günter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a Poisson process $Φ$ on a general phase space. The expectation of a function of $Φ$ can be considered as a functional of the intensity measure $λ$ of $Φ$. Extending earlier results of Molchanov and Zuyev [Math. Oper. Res. 25 (2010) 485-508] on finite Poisson processes, we study the behaviour of this functional under signed (possibly infinite) perturbations of $λ$. In particular, we obtain general Margulis-Russo type formulas for the derivative with respect to non-linear transformations of the intensity measure depending on some parameter. As an application, we study the behaviour of expectations of functions of multivariate Lévy processes under perturbations of the Lévy measure. A key ingredient of our approach is the explicit Fock space representation obtained in Last and Penrose [Probab. Theory Related Fields 150 (2011) 663-690].
description: Published in at http://dx.doi.org/10.3150/12-BEJ494 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Cyclic magnetic activity due to turbulent convection in spherical wedge geometry
Creators: name: Käpylä, Petri J.
name: Mantere, Maarit J.
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on simulations of turbulent, rotating, stratified, magnetohydrodynamic convection in spherical wedge geometry. An initially small-scale, random, weak-amplitude magnetic field is amplified by several orders of magnitude in the course of the simulation to form oscillatory large-scale fields in the saturated state of the dynamo. The differential rotation is solar-like (fast equator), but neither coherent meridional poleward circulation nor near-surface shear layer develop in these runs. In addition to a poleward branch of magnetic activity beyond 50 degrees latitude, we find for the first time a pronounced equatorward branch at around 20 degrees latitude, reminiscent of the solar cycle.
description: 5 pages, 5 figures, version published in ApJL, version with higher resolution figures http://www.helsinki.fi/~kapyla/publ.html
Smooth embeddings with Stein surface images
Creators: name: Gompf, Robert E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32T05, 57R17, 32Q28

description: A simple characterization is given of open subsets of a complex surface that smoothly perturb to Stein open subsets. As applications, complex 2-space C^2 contains domains of holomorphy (Stein open subsets) that are exotic R^4's, and others homotopy equivalent to the 2-sphere but cut out by smooth, compact 3-manifolds. Pseudoconvex embeddings of Brieskorn spheres and other 3-manifolds into complex surfaces are constructed, as are pseudoconcave holomorphic fillings (with disagreeing contact and boundary orientations). Pseudoconcave complex structures on Milnor fibers are found. A byproduct of this construction is a simple polynomial expression for the signature of the (p,q,npq-1) Milnor fiber. Akbulut corks in complex surfaces can always be chosen to be pseudoconvex or pseudoconcave submanifods. The main theorem is expressed via Stein handlebodies (possibly infinite), which are defined holomorphically in all dimensions by extending Stein theory to manifolds with noncompact boundary.
description: 26 pages, 1 figure. Version 2 has minor stylistic changes for clarity, remark expanded at end of Section 4; accepted for publication by the Journal of Topology
Semiclassical folded string in AdS4 X CP3
Creators: name: Beccaria, Matteo
name: Macorini, Guido
name: Ratti, CarloAlberto
name: Valatka, Saulius
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider type IIA superstring theory on the background AdS4 x CP3, and the classical solution describing a folded string spinning in AdS4 with angular momentum in CP3. In the 't Hooft limit, it is the gravity dual of twist operators in the ABJM superconformal theory. We quantize the classical solution by algebraic curve methods and determine the first semiclassical correction to the energy. We provide an integral representation for this quantity valid for all values of the charges. We analyze its properties in the special regimes associated with a short or long string providing various accurate analytical expansions. Finally, we investigate various properties of the so-called slope, the leading term of the energy for short strings, collecting information that could be useful in attempts to generalize the exact results recently proposed for the folded string in AdS5 x S5.
description: 23 pages, 1 pdf figure, JHEP style, typo corrected
A study of radio frequency interference for the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
Creators: name: Höfer, Carolin
Publisher: name: University of British Columbia
Year: 2014

description: The following document describes pursued studies to understand the properties of radio frequency interference (RFI) which affects the quality of the data of the Canadian Hydrogen Intensity Mapping Experiment Pathfinder at the Dominion Radio Astronomy Observatory in Penticton, British Columbia. The Canadian Hydrogen Intensity Mapping Experiment is a challenging project aimed to trace large scale structure by observing the 21cm emission line of neutral hydrogen in the frequency spectrum 400-800MHz to research the nature of Dark Energy. RFI is terrestrial signal caused by radio bands, TV stations, satellites etc. that produces unwanted disturbances in the frequency spectrum which adds power to the data. It represents a challenge to measure faint sources in the sky and we seek ways to identify it based on its statistical properties such as non-Gaussianity. We have designed algorithms that aim to identify and flag RFI in our data. Digital TV bands cause permanent corruption in the affected frequency bins and account for a 19% loss of bandwidth. The 5 sigma threshold cut searches for time-varying RFI in each frequency bin. Outliers above 5 standard deviations are iteratively flagged but not all of the occurring RFI were recognized due to non-Gaussianity. The median absolute deviation cut is a robust statistical method that uses sky data only. Identification of short-lived and long-lived RFI occurrences originating mainly from the sky has been successful. A correlation coefficient algorithm uses a combination of a reference RFI antenna sensitive to the horizon and a sky antenna to find correlated signals that are significantly above expected thermal noise of the radiometer while disregarding correlation due to sky signal. RFI at the horizon is well recognized by this method.
Supplementary Material from Parasitism shapes selection by drastically reducing host fitness and increasing host fitness variation
Creators: name: Hasik, Adam Z.
name: Siepielski, Adam M.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology

description: Determining the effects of parasites on host reproduction is key to understanding how parasites affect the underpinnings of selection on hosts. Although infection is expected to be costly, reducing mean fitness, infection could also increase variation in fitness costs among hosts, both of which determine the potential for selection on hosts. To test these ideas, we used a phylogenetically informed meta-analysis of 118 studies to examine how changes in the mean and variance in the outcome of reproduction differed between parasitized and non-parasitized hosts. We found that parasites had severe negative effects on mean fitness, with parasitized hosts suffering reductions in fecundity, viability and mating success. Parasite infection also increased variance in reproduction, particularly fecundity and offspring viability. Surprisingly, parasites had similar effects on viability when either the male or female was parasitized. These results not only provide the first synthetic, comparative, and quantitative summary of the strong deleterious effects of parasites on host reproductive fitness but also reveal a consistent role for parasites in shaping the opportunity for selection.
Testing microscopic discretization
Creators: name: Navascues, Miguel
name: Perez-Garcia, David
name: Villanueva, Ignacio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: What can we say about the spectra of a collection of microscopic variables when only their coarse-grained sums are experimentally accessible? In this paper, using the tools and methodology from the study of quantum nonlocality, we develop a mathematical theory of the macroscopic fluctuations generated by ensembles of independent microscopic discrete systems. We provide algorithms to decide which multivariate gaussian distributions can be approximated by sums of finitely-valued random vectors. We study non-trivial cases where the microscopic variables have an unbounded range, as well as asymptotic scenarios with infinitely many macroscopic variables. From a foundational point of view, our results imply that bipartite gaussian states of light cannot be understood as beams of independent d-dimensional particle pairs. It is also shown that the classical description of certain macroscopic optical experiments, as opposed to the quantum one, requires variables with infinite cardinality spectra.
description: Proof of strong NP-hardness. Connection with random walks. New asymptotic results. Numerous typos corrected
Anne Kleesmendi välipäevik nr 39
Creators: name: Kleesment, Anne-Liis
Publisher: name: Tallinna Tehnikaülikooli Geoloogia Instituut
Year: 1982
Subjects: Poola
Devon
paljandid
puuraugud

description: Devoni läbilõike kirjeldus Poola paljandites ja puuraukudes.
Equivariant map superalgebras
Creators: name: Savage, Alistair
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B65, 17B10

description: Suppose a group $Γ$ acts on a scheme $X$ and a Lie superalgebra $\mathfrak{g}$. The corresponding equivariant map superalgebra is the Lie superalgebra of equivariant regular maps from $X$ to $\mathfrak{g}$. We classify the irreducible finite dimensional modules for these superalgebras under the assumptions that the coordinate ring of $X$ is finitely generated, $Γ$ is finite abelian and acts freely on the rational points of $X$, and $\mathfrak{g}$ is a basic classical Lie superalgebra (or $\mathfrak{sl}(n,n)$, $n > 0$, if $Γ$ is trivial). We show that they are all (tensor products of) generalized evaluation modules and are parameterized by a certain set of equivariant finitely supported maps defined on $X$. Furthermore, in the case that the even part of $\mathfrak{g}$ is semisimple, we show that all such modules are in fact (tensor products of) evaluation modules. On the other hand, if the even part of $\mathfrak{g}$ is not semisimple (more generally, if $\mathfrak{g}$ is of type I), we introduce a natural generalization of Kac modules and show that all irreducible finite dimensional modules are quotients of these. As a special case, our results give the first classification of the irreducible finite dimensional modules for twisted loop superalgebras.
description: 27 pages. v2: Section numbering changed to match published version. Other minor corrections. v3: Minor corrections (see change log at end of introduction)