cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High Performance Interference Suppression in Multi-User Massive MIMO Detector
Creators: name: Ivanov, Andrey
name: Osinsky, Alexander
name: Lakontsev, Dmitry
name: Yarotsky, Dmitry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Computer Science (cs.OH)
subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we propose a new nonlinear detector with improved interference suppression in Multi-User Multiple Input, Multiple Output (MU-MIMO) system. The proposed detector is a combination of the following parts: QR decomposition (QRD), low complexity users sorting before QRD, sorting-reduced (SR) K-best method and minimum mean square error (MMSE) pre-processing. Our method outperforms a linear interference rejection combining (IRC, i.e. MMSE naturally) method significantly in both strong interference and additive white noise scenarios with both ideal and real channel estimations. This result has wide application importance for scenarios with strong interference, i.e. when co-located users utilize the internet in stadium, highway, shopping center, etc. Simulation results are presented for the non-line of sight 3D-UMa model of 5G QuaDRiGa 2.0 channel for 16 highly correlated single-antenna users with QAM16 modulation in 64 antennas of Massive MIMO system. The performance was compared with MMSE and other detection approaches.
description: Accepted for presentation at the VTC2020-Spring conference
Characterization of water-based liquid scintillator for Cherenkov and scintillation separation
Creators: name: Caravaca, J.
name: Land, B. J.
name: Yeh, M.
name: Gann, G. D. Orebi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This paper presents measurements of the scintillation light yield and time profile for a number of concentration of water-based liquid scintillator, formulated from linear alkylbenzene (LAB) and 2,5-diphenyloxazole (PPO). We find that the scintillation light yield is linear with the concentration of liquid scintillator in water between 1 and 10% with a slope of 127.9+-17.0 ph/MeV/concentration and an intercept value of 108.3+-51.0 ph/MeV, the latter being illustrative of non-linearities with concentration at values less than 1%. This is larger than expected from a simple extrapolation of the pure liquid scintillator light yield. The measured time profiles are consistently faster than that of pure liquid scintillator, with rise times less than 250ps and prompt decay constants in the range of 2.1-2.85ns. Additionally, the separation between Cherenkov and scintillation light is quantified using cosmic muons in the CHESS experiment for each formulation, demonstrating an improvement in separation at the centimeter scale. Finally, we briefly discuss the prospects for large-scale detectors.
DEVELOPING PROFESSIONAL COMPETENCE OF THE TEACHER IN EDUCATION
Creators: name: Olimova, Diana Jamol Kizi
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: the professionalism and pedagogical skills
Professional competence
the Federal State Educational Standard of LLC
self-education of teachers
certification
GEF
self-improvement

description: This article is about how teachers can improve their skills and knowledge, as well as how to properly pass them on to students and what skills a good teacher should possess.
ЎЗБЕКИСТОНДА ТОМОРҚА ХЎЖАЛИГИ ВА ҚИШЛОҚ ЁШЛАРИНИНГ МЕҲНАТ ТАРБИЯСИ (XX АСР 70 ЙИЛЛАРИ)
Creators: name: Обиджон Ҳамид Ўғли Жайнаров
name: Рахмон Рашидович Мухаммадиев
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: шахсий томорқа хўжалиги
қишлоқ
колхозчи
ишчи ва хизматчи
мактаб ўқувчилари
фойдали меҳнат
меҳнат тарбияси
меҳнат тақсимоти

description: Мақолада XX асрнинг 70-йилларида шахсий томорқа хўжалиги, унда меҳнат қилувчи ёшларнинг шаҳар ва қишлоқ бўйича динамикаси, томорқадаги меҳнат тақсимотида ёшларнинг ўрни ва томорқа хўжалигининг мактаб ўқувчиларини жисмоний ва маънавий тарбиясидаги аҳамияти тадқиқ қилинган
Quantifying the Line-of-Sight Halo Contribution to the Dark Matter Convergence Power Spectrum from Strong Gravitational Lenses
Creators: name: Şengül, Atınç Çağan
name: Tsang, Arthur
name: Rivero, Ana Diaz
name: Dvorkin, Cora
name: Zhu, Hong-Ming
name: Seljak, Uroš
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Galaxy-galaxy strong gravitational lenses have become a popular probe of dark matter (DM) by providing a window into structure formation on the smallest scales. In particular, the convergence power spectrum of subhalos within lensing galaxies has been suggested as a promising observable to study DM. However, the distances involved in strong-lensing systems are vast, and we expect the relevant volume to contain line-of-sight (LOS) halos that are not associated with the main lens. We develop a formalism to calculate the effect of LOS halos as an effective convergence power spectrum. The multi-lens plane equation couples the angular deflections of consecutive lens planes, but by assuming that the perturbations due to the LOS halos are small, we show that they can be projected onto the main-lens plane as effective subhalos. We test our formalism by simulating lensing systems using the full multi-plane lens equation and find excellent agreement. We show how the relative contribution of LOS halos and subhalos depends on the source and lens redshift, as well as the assumed halo and subhalo mass functions. For a fiducial system with fraction of DM halo mass in substructure $f_{\rm sub}=0.4\%$ for subhalo masses $[10^5-10^8]\rm{M}_{\odot}$, the interloper contribution to the power spectrum is at least several times greater than that of subhalos for source redshifts $z_s\gtrsim0.5$. Furthermore, it is likely that for the SLACS and BELLS lenses the interloper contribution dominates: $f_{\rm sub}\gtrsim2\%$ ($4\%$) is needed for subhalos to dominate in SLACS (BELLS), which is higher than current upper bounds on $f_{\rm sub}$ for our mass range. Since the halo mass function is better understood from first principles, the dominance of interlopers in galaxy-galaxy lenses with high-quality imaging can be seen as a significant advantage when translating this observable into a constraint on DM.
description: 24 pages, 8 figures, Matches accepted version, v3: Fixed a typo in Eq. C4 in the appendix. No changes in the derivations
ОТА-ОНАЛАРНИНГ ВИРТУАЛ ПЕДАГОГИК МАДАНИЯТИНИ РИВОЖЛАНТИРИШНИНГ АМАЛИЙ МАСАЛАЛАРИ
Creators: name: Хилола Рахимбердиевна Хайдарова
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Ота-она
оила
мактаб
маҳалла
тарбия
маданият
виртуал
медиа
ахборот
компьютер
интернет
фейсбук
телевизор
ўқитувчи
саводхонлик
виртуал назорат
фарзандлар
миллий ғурур

description: Мақолада ахборотлашган жамият шароитида ота-оналарнинг виртуалпедагогик маданиятини ривожлантиришнинг амалий масалалари бугунги кунда долзарб эканлиги таҳлил қилинган. Шунингдек, виртуал, маданият, медиа маданият, виртуал саводхонлик, медиа саводхонлик каби тушунчаларига алоҳида изоҳ берилган бўлиб, улар ахборот ва оммавий зўравонликдан ҳимоя қобиғига ўхшатилган. Бугунги кунда дунё оммавий ахборот воситаларида ахборотни танлаш ва тўғри баҳолаш маданияти (виртуал маданият) долзарб муаммолардан бири эканлиги ва бу муаммонинг ечимини излашда аввало оилада хар бир ота-она виртуал-педагогик маданиятга эга бўлиши ёрқин мисоллар орқали кўрсатилган
Industry, firm, year, and country effects on profitability: Evidence from a large sample of EU food processing firms
Creators: name: Schiefer, Jan
name: Hartmann, Monika
name: Schiefer, Jan
name: Hartmann, Monika
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Financial Economics
subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business
subject: variance components
subject: abnormal profit
subject: EU-27
subject: MBV
subject: RBV
subject: comparative advantage

description: This paper analyzes the variance in accounting profitability within the European food industry. Based on a large panel data set, the variance in return on assets (ROA) is decomposed into year, country, industry, and firm effects. Further on, we include all possible interactions between year, country, and industry and discuss the theoretical foundations for these effects. After singling out the significant effect classes in a nested ANOVA with a thoroughly designed rotation regarding the order of effect introduction, we determine effect magnitude using components of variance (COV). Our results show that firm characteristics seem to be far more important than industry structure in determining the level of economic return within the food industry. Year and country effects, as well as their interactions were weak or insignificant, indicating that macroeconomics and trade theory offer little potential to serve as a basis for the explanation of performance differentials. While neither national nor industry-specific cycles were significant, EU-wide fluctuations significantly contributed to explaining differences in performance, suggesting that economic cycles in the EU are by and large synchronized.
Examining the Effects of Ecological and Political Boundaries on the Potential for Water Quality Trading: Lessons from a Southeastern Trading Framework
Creators: name: Keiser, David A.
name: Mullen, Jeffrey D.
name: Bergstrom, John C.
name: Smith, Nathan B.
name: Radcliffe, David E.
name: Risse, Mark L.
name: Fowler, Laurie A.
name: Keiser, David A.
name: Mullen, Jeffrey D.
name: Bergstrom, John C.
name: Smith, Nathan B.
name: Radcliffe, David E.
name: Risse, Mark L.
name: Fowler, Laurie A.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: Public Economics
subject: water quality trading
subject: phosphorus trading
subject: nutrient trading
subject: water pollution
subject: pollution markets

description: Water quality trading (trading) as a means to improve water quality has become an increasingly popular instrument considered by environmental policy makers. Although the U.S. Environmental Protection Agency lists more than forty current trading programs in the U.S., only a few active markets exist. The literature identifies several hurdles to trading, overcoming which requires a deeper understanding of the interaction between local environmental, legal, and economic conditions. Particular challenges include thin markets, uncertainty related to the course and fate of nutrient flows, varying degrees of political support, and high transaction costs related to market infrastructure, monitoring, and enforcement. These hindrances often arise from and contribute to the confinement of trading to tight ecological and political boundaries. This paper explores the effect of these boundaries on the potential for trading in two southeastern reservoirs and their respective watersheds. Results provide insight into the effects of the spatial expansion of markets. These findings contribute to the current dialogue that seeks to better understand barriers to trading.
U.S. Cotton Prices and the World Cotton Market: Forecasting and Structural Change
Creators: name: Isengildina-Massa, Olga
name: MacDonald, Stephen
name: Isengildina-Massa, Olga
name: MacDonald, Stephen
Publisher: name: Unknown
Year: 2009
Subjects: subject: Demand and Price Analysis
subject: forecasting
subject: cotton
subject: price
subject: demand
subject: trade
subject: structural change
subject: farm programs.

description: The purpose of this study was to analyze structural changes that took place in the cotton industry in recent years and develop a statistical model that reflects the current drivers of U.S. cotton prices. Legislative changes authorized the U.S. Department of Agriculture to resume publishing cotton price forecasts for the first time in 79 years. In addition, systematic problems have become apparent in the forecasting models used by USDA and elsewhere, highlighting the need for an updated review of price relationships. This study concluded that a structural break in the U.S. cotton industry occurred in 1999, and that world cotton supply has become an important determinant of U.S. cotton prices. China’s trade and production policy also continues to be an important factor in price determination. The model developed here forecasts changes in the U.S. upland cotton farm price based on changes in U.S. cotton supply, changes in U.S. stocks-to-use ratio (S/U), changes in China’s net imports as a share of world consumption, selected farm policy parameters, and changes in the foreign supply of cotton.
Conductors and newforms for U(1,1)
Creators: name: Lansky, Joshua
name: Raghuram, A
Publisher: name: arXiv
Year: 2005
Subjects: subject: Number Theory (math.NT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Let $F$ be a non-Archimedean local field whose residue characteristic is odd. In this paper we develop a theory of newforms for $U(1,1)(F)$, building on previous work on $SL_2(F)$. This theory is analogous to the results of Casselman for $GL_2(F)$ and Jacquet, Piatetski-Shapiro, and Shalika for $GL_n(F)$. To a representation $π$ of $U(1,1)(F)$, we attach an integer $c(π)$ called the conductor of $π$, which depends only on the $L$-packet $Π$ containing $π$. A newform is a vector in $π$ which is essentially fixed by a congruence subgroup of level $c(π)$. We show that our newforms are always test vectors for some standard Whittaker functionals, and, in doing so, we give various explicit formulae for newforms.
description: 25 pages
Die Sophienkirche in Salonik
Creators: name: Strzygowski, Josef
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 1 Nr. 1 (1901): Oriens christianus, Band 1, Heft 1
Scintillating double beta decay bolometers
Creators: name: Pirro, S.
name: Beeman, J. W.
name: Capelli, S.
name: Pavan, M.
name: Previtali, E.
name: Gorla, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present the results obtained in the development of scintillating Double Beta Decay bolometers. Several Mo and Cd based crystals were tested with the bolometric technique. The scintillation light was measured through a second independent bolometer. A 140 g CdWO_4 crystal was run in a 417 h live time measurement. Thanks to the scintillation light, the alpha background is easily discriminated resulting in zero counts above the 2615 keV gamma line of Thallium 208. These results, combined with an extremely easy light detector operation, represent the first tangible proof demonstrating the feasibility of this kind of technique.
description: 15 pages, 8 figures
Leptogenesis in the $μτ$ basis
Creators: name: Nishi, C. C.
name: Fong, Chee Sheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We formulate three-flavor type-I leptogenesis in the $μτ$ basis which is convenient because in the three-flavor regime, both $μ$ and $τ$ charged lepton Yukawa interactions are in thermal equilibrium and the thermal bath is symmetric under the exchange $μ\leftrightarrow τ$. We apply this formalism to models with $μτ$-reflection $\mathsf{CP}^{μτ}$ symmetry. We confirm the previous result that leptogenesis fails in the three-flavor regime with exact $\mathsf{CP}^{μτ}$ symmetry. Allowing $\mathsf{CP}^{μτ}$ symmetry to be broken to various degrees, we show that leptogenesis can be successful in the three-flavor regime only in certain tuned parameter space, which could further imply additional symmetry is at play. As a bonus, we derive analytical expressions which could be utilized whenever the branching ratios for the decays to $μ$ and $τ$ flavors are equal or approximately so.
description: 22 pages, 7 figures, 4 appendices
A model for Dansgaard-Oeschger events and millennial-scale abrupt climate change without external forcing
Creators: name: Gottwald, Georg A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We propose a conceptual model which generates abrupt climate changes akin to Dansgaard-Oeschger events. In the model these abrupt climate changes are not triggered by external perturbations but rather emerge in a dynamic self-consistent model through complex interactions of the ocean, the atmosphere and an intermittent process. The abrupt climate changes are caused in our model by intermittencies in the sea-ice cover. The ocean is represented by a Stommel two-box model, the atmosphere by a Lorenz-84 model and the sea-ice cover by a deterministic approximation of correlated additive and multiplicative noise (CAM) process. The key dynamical ingredients of the model are given by stochastic limits of deterministic multi-scale systems and recent results in deterministic homogenisation theory. The deterministic model reproduces statistical features of actual ice-core data such as non-Gaussian $α$-stable behaviour. The proposed mechanism for abrupt millenial-scale climate change only relies on the existence of a quantity, which exhibits intermittent dynamics on an intermediate time scale. We consider as a particular mechanism intermittent sea-ice cover where the intermittency is generated by emergent atmospheric noise. However, other mechanisms such as freshwater influxes may also be formulated within the proposed framework.
Repeat-Until-Success Quantum Computing
Creators: name: Lim, Yuan Liang
name: Beige, Almut
name: Kwek, Leong Chuan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate the possibility to perform distributed quantum computing using only single photon sources (atom-cavity-like systems), linear optics and photon detectors. The qubits are encoded in stable ground states of the sources. To implement a universal two-qubit gate, two photons should be generated simultaneously and pass through a linear optics network, where a measurement is performed on them. Gate operations can be repeated until a success is heralded without destroying the qubits at any stage of the operation. In contrast to other schemes, this does not require explicit qubit-qubit interactions, a priori entangled ancillas nor the feeding of photons into photon sources.
description: 5 pages, 2 figures, v3: substantially revised, v4: typos corrected
Insights from Practice About Impact in Teaching and Learning
Creators: name: :: National Forum For The Enhancement Of Teaching And Learning In Higher Education
Publisher: name: figshare
Year: 2020
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences

description: 32 projects were funded across 25 Irish higher education institutions through the National Forum’s Teaching and Learning Enhancement Fund from 2014 to 2018. These projects involved over 400 members of the Irish higher education community working collaboratively to engage a further 12,500 senior managers, staff and students in the enhancement of teaching and learning over a five-year period. This Forum Insight outlines lessons learned from a review of the impact of these projects regarding how impact can best be achieved, sustained, captured and communicated within the context of teaching and learning in higher education.
Suctobelbella Jacot 1937
Creators: name: Behan-Pelletier, Valerie M.
name: Lindo, Zoë
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Suctobelbidae
Suctobelbella

description: Suctobelbella sp. nr. subcornigera (Forsslund, 1941)
 Geographic Location and Habitats: BC: Interior, forest litter (Battigelli et al. 2004).
description: Published as part of Behan-Pelletier, Valerie M. & Lindo, Zoë, 2019, Checklist of oribatid mites (Acari: Oribatida) of Canada and Alaska, pp. 1-180 in Zootaxa 4666 (1) on page 98, DOI: 10.11646/zootaxa.4666.1.1, http://zenodo.org/record/4000595
A three-wave mixing kinetic inductance traveling-wave amplifier with near-quantum-limited noise performance
Creators: name: Malnou, M.
name: Vissers, M. R.
name: Wheeler, J. D.
name: Aumentado, J.
name: Hubmayr, J.
name: Ullom, J. N.
name: Gao, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a theoretical model and experimental characterization of a microwave kinetic inductance traveling-wave amplifier (KIT), whose noise performance, measured by a shot-noise tunnel junction (SNTJ), approaches the quantum limit. Biased with a dc current, the KIT operates in a three-wave mixing fashion, thereby reducing by several orders of magnitude the power of the microwave pump tone and associated parasitic heating compared to conventional four-wave mixing KIT devices. It consists of a 50 Ohms artificial transmission line whose dispersion allows for a controlled amplification bandwidth. We measure $16.5^{+1}_{-1.3}$ dB of gain across a 2 GHz bandwidth with an input 1 dB compression power of -63 dBm, in qualitative agreement with theory. Using a theoretical framework that accounts for the SNTJ-generated noise entering both the signal and idler ports of the KIT, we measure the system-added noise of an amplification chain that integrates the KIT as the first amplifier. This system-added noise, $3.1\pm0.6$ quanta (equivalent to $0.66\pm0.15$ K) between 3.5 and 5.5 GHz, is the one that a device replacing the SNTJ in that chain would see. This KIT is therefore suitable to read large arrays of microwave kinetic inductance detectors and promising for multiplexed superconducting qubit readout.
Statement on Copyright and Proposal of a Waiver from Certain Provisions of the TradeRelated Aspects of Intellectual Property Rights (TRIPS) Agreement for the Prevention, Containment and Treatment of COVID-19 (IP/C/W/669)
Creators: name: Justice, The Program On Information
Publisher: name: Zenodo
Year: 2021
Subjects: copyright
TRIPS
WTO
Covid-19
open access
open science
Arcadia Fund
PIJIP

description: Over 250 organizations and prominent researchers and experts, representing millions of researchers, educators, libraries, and support organizations globally, call for reduction of copyright barriers to COVID-19 prevention, containment and treatment
Guaranteed Performance Nonlinear Observer for Simultaneous Localization and Mapping
Creators: name: Hashim, Hashim A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A geometric nonlinear observer algorithm for Simultaneous Localization and Mapping (SLAM) developed on the Lie group of \mathbb{SLAM}_{n}\left(3\right) is proposed. The presented novel solution estimates the vehicle's pose (i.e. attitude and position) with respect to landmarks simultaneously positioning the reference features in the global frame. The proposed estimator on manifold is characterized by predefined measures of transient and steady-state performance. Dynamically reducing boundaries guide the error function of the system to reduce asymptotically to the origin from its starting position within a large given set. The proposed observer has the ability to use the available velocity and feature measurements directly. Also, it compensates for unknown constant bias attached to velocity measurements. Unit-qauternion of the proposed observer is presented. Numerical results reveal effectiveness of the proposed observer. Keywords: Nonlinear filter algorithm, Nonlinear observer for Simultaneous Localization and Mapping, Nonlinear estimator, nonlinear SLAM observer on manifold, nonlinear SLAM filter on matrix Lie Group, observer design, asymptotic stability, systematic convergence, Prescribed performance function, pose estimation, attitude filter, position filter, feature filter, landmark filter, gradient based SLAM observer, gradient based observer for SLAM, adaptive estimate, SLAM observer, observer SLAM framework, equivariant observer, inertial vision unit, visual, SLAM filter, SE(3), SO(3).
title: Development & Implementation of an Electron Diffraction Approach for Crystal Structure Analysis
Creators: name: Plana Ruiz, Sergi
Publisher: name: UNSPECIFIED
Year: 2021

description: The application of electron diffraction to crystallographically characterize all kinds of materials has experienced new developments that have attracted some attention in recent years. A large number of structural analyses from different compounds have been already carried out with the help of 3D electron diffraction data that were not possible with the available X-ray methods. The use of a transmission electron microscope as an electron nano-diffractometer has proved to be advantageous when diffraction data from single nanocrystals are required, for instance in phase mixtures. In this way, the individual phases do not have to be purely synthesized, which always involves the risk of structural changes. The work presented here includes the development and implementation of a novel and universal routine for the accurate and reliable acquisition of electron diffraction data. The potential of this new data collection strategy to solve various crystallographic problems is illustrated using three known materials. In addition, two unknown crystal structures from commercial products are fully determined and refined; an organic dye of low symmetry and an incommensurate modulated structure of a major constituent of cement. In particular, the precise knowledge of the different crystal structures in cement clinkers, such as the alpha'H -C2S, enables the exact phase analysis of these industrial phase mixtures directly from the manufacturing process, and paves the way for its CO2 emissions reduction.
Open-closed duality and Double Scaling
Creators: name: Das, Sumit R.
name: Gomez, Cesar
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nonperturbative terms in the free energy of Chern-Simons gauge theory play a key role in its duality to the closed topological string. We show that these terms are reproduced by performing a double scaling limit near the point where the perturbation expansion diverges. This leads to a derivation of closed string theory from this large-N gauge theory along the lines of noncritical string theories. We comment on the possible relevance of this observation to the derivation of superpotentials of asymptotically free gauge theories and its relation to infrared renormalons.
description: 10 pages, LaTeX
Tenfold your photons -- a physically-sound approach to filtering-based variance reduction of Monte-Carlo-simulated dose distributions
Creators: name: Roser, Philipp
name: Birkhold, Annette
name: Preuhs, Alexander
name: Kowarschik, Markus
name: Fahrig, Rebecca
name: Maier, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: X-ray dose constantly gains interest in the interventional suite. With dose being generally difficult to monitor reliably, fast computational methods are desirable. A major drawback of the gold standard based on Monte Carlo (MC) methods is its computational complexity. Besides common variance reduction techniques, filter approaches are often applied to achieve conclusive results within a fraction of time. Inspired by these methods, we propose a novel approach. We down-sample the target volume based on the fraction of mass, simulate the imaging situation, and then revert the down-sampling. To this end, the dose is weighted by the mass energy absorption, up-sampled, and distributed using a guided filter. Eventually, the weighting is inverted resulting in accurate high resolution dose distributions. The approach has the potential to considerably speed-up MC simulations since less photons and boundary checks are necessary. First experiments substantiate these assumptions. We achieve a median accuracy of 96.7 % to 97.4 % of the dose estimation with the proposed method and a down-sampling factor of 8 and 4, respectively. While maintaining a high accuracy, the proposed method provides for a tenfold speed-up. The overall findings suggest the conclusion that the proposed method has the potential to allow for further efficiency.
description: 6 pages, 3 figures, Bildverarbeitung f\"ur die Medizin 2020
NATIONAL ADMINISTERED PROTECTION AGENCIES: THEIR ROLE IN THE POST-URUGUAY ROUND WORLD
Creators: name: Meilke, Karl D.
name: Sarker, Rakhal
name: Meilke, Karl D.
name: Sarker, Rakhal
Publisher: name: Unknown
Year: 1996
Subjects: International Relations/Trade

description: This paper reviews the role of national administered protection agencies, whose responsibility is the enforcement of national trade remedy laws. After reviewing four recent trade remedy cases we argue that the role of the national administered protection agencies should be changed. Given the additional responsibilities the WTO has assumed in administering the Agreement on Agriculture, the growth of regional integration agreements and the increasing use of anti-dumping and countervailing duty actions against fairly traded imports, we argue that all trade actions should be taken to the WTO for settlement. The role of the national administered protection agencies should be changed to make them agents for trade liberalization. This would involve them taking on three primary functions: 1) as transparency agents; 2) as investigatory agents; and 3) as advocacy agents.
Der Katholikos Timotheos I und seine Briefe
Creators: name: Braun, Oscar
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 1 Nr. 1 (1901): Oriens christianus, Band 1, Heft 1
title: Asynchronous Parametric Excitation in Dynamical Systems
Creators: name: Karev, Artem
Publisher: name: UNSPECIFIED
Year: 2021

description: The overall objective of this thesis is to obtain a comprehensive understanding of the stability behavior of general parametrically excited systems. Even though the manifold resonance effects caused by time-periodic variation of system parameters have been intensively studied since the mid-19th century, several aspects still remain unexplored. While, historically, parametric excitation had been prominent predominantly for its destabilizing impact (resonance), in recent decades, also its stabilizing impact (anti-resonance) had attained significant attention. Owing to this historical development, the coexistence of resonance and anti-resonance at certain frequencies in the case of asynchronous excitation was not identified. Further, most of the existing studies dealing with the appearance of different resonance effects are limited to simple systems featuring neither circulatory nor gyroscopic terms, making the response of more complex systems to parametric excitation unpredictable. In the present contribution, the stability behavior of systems featuring circulatory and gyroscopic terms subject to asynchronous parametric excitation is investigated employing the semi-analytical method of normal forms. First, novel stability patterns are identified revealing global stabilizing and destabilizing effects. More importantly, it is shown that, contrary to the previous knowledge, resonance and anti-resonance may both simultaneously appear in the vicinity of certain resonance frequencies with a particularly steep transition between them. Even for complex systems featuring circulatory terms, these effects can be easily assessed qualitatively and quantitatively using the symbolic expressions derived for the most representative stability features. The results are validated on an electronic system following the simulation-based approach. Finally, with the enhanced understanding of the parametric stability phenomena, two exemplary mechanical systems, including a minimal model of a disk brake, are analyzed. The analysis emphasizes the practical significance of the coexistence of resonance and anti-resonance and advocates more accurate consideration of possible asymmetries, i.e., parametric excitation, in the brake squeal analysis.
Pilot-scale study of phosphorus recovery through struvite crystallization
Creators: name: Adnan, Ali
Publisher: name: University of British Columbia
Year: 2009

description: The workability of a new pilot-scale reactor, based on the same process principle as that of the previously tested bench-scale reactor, was examined. This work extended the long-term research program, and bridged the gap between phosphorus removal and recovery. The problem of the fines encountered during the bench-scale study was overcome. The pilot-scale UBC MAP Crystallizer, which was used to remove / recover phosphorus through struvite formation, achieved ortho-P removal rates of over 90%, for a tested range (47 mg/L ~ 220 m/L) of influent P concentrations. The desired degree of P-removal was achieved by controlling the reactor by varying operating pH and the supersaturation ratio at the inlet. The high P-removals rates (~ 90%) were achieved even at a pH 7.3, which is contrary to the information found in the literature, where generally higher pH values (8.2 ~ 9) are recommended. This indicates that alkaline pH is not the only factor which can cause the process fluid to be supersaturated. Limited results showed that process fluid can also be supersaturated by an excessive dosage of the magnesium ions, thereby indicating that magnesium can also be used as a controlling parameter. About 80% of phosphate removed was recovered as harvestable struvite crystals. In general, there was no problem of fines production during the pilot-scale study. The average mean size of the harvested crystals remained over 2 mm, for all the experiments conducted. The inreactor supersaturation ratio and the crystal retention time (CRT) were identified as the major factors affecting mean crystal size. Using solubility criteria, the in-reactor supersaturation ratio was used to define the metastable zone boundaries. The system performance, both in terms of process efficiency and the quality of the harvested product, was at its best when the in-reactor supersaturation ratio was between 2 and 3. The results showed that there was a narrow working zone for optimized crystallization process and a deviation from the optimal metastable zone always resulted in the plugging of the reactor. An equilibrium model (developed earlier) which predicts the effluent concentrations of struvite constituent ions, was validated using pilot-scale study results. The results predicted by an equilibrium model closely matched the actual pilot-scale results. With an expected knowledge of the effluent concentrations, a process engineer / operator can use an appropriate degree of recycle ratio, thereby ensuring the process conditions in the metastable zone of crystallization. Thus, the use of an equilibrium model is recommended in future related studies.
Conformal Symmetry on the Instanton Moduli Space
Creators: name: Tian, Yu
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The conformal symmetry on the instanton moduli space is discussed using the ADHM construction, where a viewpoint of "homogeneous coordinates" for both the spacetime and the moduli space turns out to be useful. It is shown that the conformal algebra closes only up to global gauge transformations, which generalizes the earlier discussion by Jackiw et al. An interesting 5-dimensional interpretation of the SU(2) single-instanton is also mentioned.
description: 7 pages, LaTeX, version to appear in J. Phys. A: Math. Gen
Reionization inference from the CMB optical depth and E-mode polarization power spectra
Creators: name: Qin, Yuxiang
name: Poulin, Vivian
name: Mesinger, Andrei
name: Greig, Bradley
name: Murray, Steven
name: Park, Jaehong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Epoch of Reionization (EoR) depends on the complex astrophysics governing the birth and evolution of the first galaxies and structures in the intergalactic medium. EoR models rely on cosmic microwave background (CMB) observations, and in particular the large-scale E-mode polarization power spectra (EE PS), to help constrain their highly uncertain parameters. However, rather than directly forward-modelling the EE PS, most EoR models are constrained using a summary statistic -- the Thompson scattering optical depth, $τ_e$. Compressing CMB observations to $τ_e$ requires adopting a basis set for the EoR history. The common choice is the unphysical, redshift-symmetric hyperbolic tangent (Tanh) function, which differs in shape from physical EoR models based on hierarchical structure formation. Combining public EoR and CMB codes, 21cmFAST and CLASS, here we quantify how inference using the $τ_e$ summary statistic impacts the resulting constraints on galaxy properties and EoR histories. Using the last Planck 2018 data release, we show that the marginalized constraints on the EoR history are more sensitive to the choice of the basis set (Tanh vs physical model) than to the CMB likelihood statistic ($τ_e$ vs PS). For example, EoR histories implied by the growth of structure show a small tail of partial reionization extending to higher redshifts. However, biases in inference using $τ_e$ are negligible for the Planck 2018 data. Using EoR constraints from high-redshift observations including the quasar dark fraction, galaxy UV luminosity functions and CMB EE PS, our physical model recovers $τ_e=0.0569^{+0.0081}_{-0.0066}$.
description: 11 pages, 5 figures, Updated to match the published version. Added Gamma evolution; Only minor changes
A Dynamical Theory of Quantum Measurement and Spontaneous Localization
Creators: name: Belavkin, V. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We develop a rigorous treatment of discontinuous stochastic unitary evolution for a system of quantum particles that interacts singularly with quantum "bubbles" at random instants of time. This model of a "cloud chamber" allows to watch and follow with a quantum particle along the trajectory in the cloud chamber by sequential unsharp localization of spontaneous scatterings of the bubbles. Thus, the continuous reduction and spontaneous localization theory is obtained as the result of quantum filtering theory, i.e., a theory describing the conditioning of the a priori quantum state by the measurement data. We show that in the case of indistinguishable particles the a posteriori dynamics is mixing, giving rise to an irreversible Boltzmann-type reduction equation. The latter coincides with the nonstochastic Schroedinger equation only in the mean field approximation, whereas the central limit yields Gaussian mixing fluctuations described by stochastic reduction equations of diffusive type.
description: 25 pages. See also related papers at http://www.maths.nott.ac.uk/personal/vpb/research/mes_fou.html and http://www.maths.nott.ac.uk/personal/vpb/research/evo_equ.html
Suctobelbella Jacot 1937
Creators: name: Behan-Pelletier, Valerie M.
name: Lindo, Zoë
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Suctobelbidae
Suctobelbella

description: Suctobelbella sp.
 Geographic Location and Habitats: BC: North of Kamloops, in Douglas-fir litter (Marshall 1979); Upper Klanawa Mainline site, near Franklin River (2 spp.) (Berch et al. 2001); Isaiah Creek study site (5 spp.) (Lindo & Stevenson 2007); Vancouver Is., Walbran Valley (Lindo & Winchester 2006) (6 spp.) (Lindo & Winchester 2007; Lindo 2010); Interior, forest litter (9 spp.) (Battigelli et al. 2004); AB: Kananaskis Valley, Lodgepole pine litter (Powell & Skaley 1975); Kananaskis Valley, Lodgepole pine forest (McLean & Parkinson 1998); EMEND Site, White spruce and Trembling aspen litter (2 spp.) (Lindo & Visser 2004); Trembling aspen, White spruce mesocosm (Cameron et al. 2013); ABMI Sites (4 spp.) (Walter & Latonas 2012; Walter et al. 2014); ON: Petawawa National Forestry Institute, Chalk River, mixed conifer-hardwood forest (3 spp.) (Bird & Chatarpaul 1986); Sudbury, mixed deciduous coniferous forest, (3 spp.) (St. John et al. 2002); near Chapleau (2 spp.) (Rousseau et al. 2018); near White River (Barreto & Lindo 2018); QC: Abitibi, boreal mixedwood forest (4 spp.) (Déchêne & Buddle 2009, 2010); NB: peatlands (Behan-Pelletier & Bissett 1994); Maritime Lowlands (Behan-Pelletier 2010); NS: Cape Breton Highlands NP (Behan- Pelletier 2010; Behan-Pelletier et al. 1987); NL: between Corner Brook and Little Grand Lake, Balsam fir forests (Dwyer et al. 1997, 1998).
 Superfamily Tectocepheoidea
 Family Tectocepheidae
 Genus Tectocepheus Berlese, 1896
description: Published as part of Behan-Pelletier, Valerie M. & Lindo, Zoë, 2019, Checklist of oribatid mites (Acari: Oribatida) of Canada and Alaska, pp. 1-180 in Zootaxa 4666 (1) on page 98, DOI: 10.11646/zootaxa.4666.1.1, http://zenodo.org/record/4000595
Fully-automatic CT data preparation for interventional X-ray skin dose simulation
Creators: name: Roser, Philipp
name: Birkhold, Annette
name: Preuhs, Alexander
name: Stimpel, Bernhard
name: Syben, Christopher
name: Strobel, Norbert
name: Kowarschik, Markus
name: Fahrig, Rebecca
name: Maier, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Recently, deep learning (DL) found its way to interventional X-ray skin dose estimation. While its performance was found to be acceptable, even more accurate results could be achieved if more data sets were available for training. One possibility is to turn to computed tomography (CT) data sets. Typically, computed tomography (CT) scans can be mapped to tissue labels and mass densities to obtain training data. However, care has to be taken to make sure that the different clinical settings are properly accounted for. First, the interventional environment is characterized by wide variety of table setups that are significantly different from the typical patient tables used in conventional CT. This cannot be ignored, since tables play a crucial role in sound skin dose estimation in an interventional setup, e. g., when the X-ray source is directly underneath a patient (posterior-anterior view). Second, due to interpolation errors, most CT scans do not facilitate a clean segmentation of the skin border. As a solution to these problems, we applied connected component labeling (CCL) and Canny edge detection to (a) robustly separate the patient from the table and (b) to identify the outermost skin layer. Our results show that these extensions enable fully-automatic, generalized pre-processing of CT scans for further simulation of both skin dose and corresponding X-ray projections.
description: 6 pages, 4 figures, Bildverarbeitung f\"ur die Medizin 2020, code will be accessible soon (url)
Tectocepheus Berlese 1896
Creators: name: Behan-Pelletier, Valerie M.
name: Lindo, Zoë
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Tectocepheidae
Tectocepheus

description: Tectocepheus sp.
 Geographic Location and Habitats: BC:Osoyoos, Haynes Lease (Behan-Pelletier1987b); AB:Lethbridge, fescue prairie (Osler et al. 2008); Trembling aspen, White spruce mesocosm (Cameron et al. 2013); SK:
 Matador IBP Site, dry, mixed prairie (Willard 1974); ON: 3 km south of Guelph, Cornfield (Broadbent & Tomlin 1979); Sudbury, White birch and Trembling aspen (St. John et al. 2002); QC: Apple orchard (Forest et al. 1982); NB: Maritime Lowlands (Behan-Pelletier 2010; Behan-Pelletier et al. 1987); NS: Cape Breton Highlands NP (Behan-Pelletier 2010; Behan-Pelletier et al. 1987).
 Superfamily Limnozetoidea
 Family Hydrozetidae
 Genus Hydrozetes Berlese, 1902
description: Published as part of Behan-Pelletier, Valerie M. & Lindo, Zoë, 2019, Checklist of oribatid mites (Acari: Oribatida) of Canada and Alaska, pp. 1-180 in Zootaxa 4666 (1) on pages 99-100, DOI: 10.11646/zootaxa.4666.1.1, http://zenodo.org/record/4000595
WHEAT BUFFER STOCKS AND TRADE IN AN EFFICIENT GLOBAL ECONOMY
Creators: name: Makki, Shiva S.
name: Tweeten, Luther G.
name: Miranda, Mario J.
name: Makki, Shiva S.
name: Tweeten, Luther G.
name: Miranda, Mario J.
Publisher: name: Unknown
Year: 1995
Subjects: Crop Production/Industries
International Relations/Trade

description: This study assesses storage and trade of wheat in an integrated global economy. Domestic and international linkages are analyzed using a dynamic rational expectations model of the world wheat market. The results of this study demonstrate the importance of endogenizing both storage and trade in studying commodity markets. Results suggest an optimal US buffer stock level of 150 million bushel. Results indicate that past government stockholdings have not followed efficient market outcomes. Private markets likely would perform better in the absence of government market distortions. Results indicate that elimination of the Export Enhancement Program by the US and of export restitution payments by the EU is unlikely to have a major impact on wheat exports from the two regions, but will save millions of tax dollars in both regions.
Hydrozetes octosetosus Willmann 1932
Creators: name: Behan-Pelletier, Valerie M.
name: Lindo, Zoë
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Hydrozetidae
Hydrozetes
Hydrozetes octosetosus

description: Hydrozetes octosetosus Willmann, 1932
 Geographic Location: AB: ABMI Sites; Namur Lake (Walter & Latonas 2012).
 Habitats: aquatic species.
 Distribution: Holarctic.
description: Published as part of Behan-Pelletier, Valerie M. & Lindo, Zoë, 2019, Checklist of oribatid mites (Acari: Oribatida) of Canada and Alaska, pp. 1-180 in Zootaxa 4666 (1) on page 100, DOI: 10.11646/zootaxa.4666.1.1, http://zenodo.org/record/4000595
ANALYSIS OF U.S. EXPORT ENHANCEMENT TARGETING AND BONUS DETERMINATION CRITERIA
Creators: name: Haley, Stephen L.
name: Skully, David W.
name: Haley, Stephen L.
name: Skully, David W.
Publisher: name: Unknown
Year: 1995
Subjects: subject: International Relations/Trade
subject: export enhancement program
subject: wheat

description: This research analyzes the criteria set from which policymakers have selected import markets to target EEP wheat bonuses. Results presented herein indicate that the administration of EEP has favored no specific criterion -- rather, the emphasis placed on various criteria has fluctuated over time. Although putting pressure on the EU was a much repeated justification for the program, expanding U.s. wheat exports and pressuring the Canadians guided targeting allocations as much as, if not more than, pressuring the EU. This research also develops a method for predicting which wheat import markets are likely to be important in the future, based on an identification of specific policy objectives.