cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effect of Disturbance Model Selection upon Performance, Robustness and Control Effort of Model Predictive Controllers
Creators: name: Liu, Wenyu
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Chemical
subject: disturbance
subject: MPC
subject: Control

description: Unmeasured disturbances are encountered in the chemical process industries but modelling them accurately can be a difficult task. Instead, commercial Model Predictive Control packages assume various disturbance models a priori. In an attempt to identify the best default model, this research evaluates closed-loop properties such as best achievable servo and regulatory performances, robustness and control effort associated with selected disturbance models. Results show that poles of assumed disturbance model should match those of the actual disturbance as closely as possible. Further, numerator polynomial of the model, or “T-filter”, represents a strong handle for affecting compromise between robustness and achievable regulatory performance. Rather than adopting a default T-filter (e.g. z = 0.8) it is recommended that selection of the order and pole of the T-filter be made on a case-by-case basis. Detailed guidelines for choosing these parameters are provided for processes whose open-loop dynamics can be well-approximated as first-order-plus-deadtime.
INTERACTIVE METHODS OF TEACHING ENGLISH LANGUAGE FOR PRE-INTERMEDIATE LEVEL
Creators: name: Soipova, Kamila
Publisher: name: Zenodo
Year: 2023

description: Interactive methods of teaching English language for pre-intermediate level are based on the principles of communicative language teaching (CLT). CLT emphasizes the importance of communication and interaction in language learning. It focuses on developing students' ability to use language in real-life situations rather than just memorizing grammar rules and vocabulary.
OWA Wake Modelling Challenge
Creators: name: Sanz Rodrigo, J.
name: Borbón Guillén, F.
name: Fernandes Correia, P. M.
name: García Hevia, B.
name: Schlez, W.
name: Schmidt, S.
name: Basu, S.
name: Li, B.
name: Nielsen, P.
name: Cathelain, M
name: Dall'Ozzo, C.
name: Grignon, L.
name: Pullinger, D.
Publisher: name: Zenodo
Year: 2020
Subjects: OWA
wake model
meso-wake
array efficiency

description: Presentation at Wakebench3 meeting of the final results from the Offshore Wind Accelerator (OWA) Wake Modelling Challenge on the prediction of array efficiency at 5 offshore wind farms. Evaluation scripts and additional results available at the GitHub and simulation data repositories.
Efficient Random Walks on Riemannian Manifolds
Creators: name: Schwarz, Simon
name: Herrmann, Michael
name: Sturm, Anja
name: Wardetzky, Max
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: Numerical Analysis (math.NA)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 65C30, 60H35, 58J65

description: According to a version of Donsker's theorem, geodesic random walks on Riemannian manifolds converge to the respective Brownian motion. From a computational perspective, however, evaluating geodesics can be quite costly. We therefore introduce approximate geodesic random walks based on the concept of retractions. We show that these approximate walks converge in distribution to the correct Brownian motion as long as the geodesic equation is approximated up to second order. As a result we obtain an efficient algorithm for sampling Brownian motion on compact Riemannian manifolds.
description: 14 pages; v3: published version
On dimensions modulo a compact metric ANR and modulo a simplicial complex
Creators: name: Krzempek, Jerzy
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 54F45

description: V. V. Fedorchuk has recently introduced dimension functions K-dim \leq K-Ind and L-dim \leq L-Ind, where K is a simplicial complex and L is a compact metric ANR. For each complex K with a non-contractible join |K| * |K| (we write |K| for the geometric realisation of K), he has constructed first countable, separable compact spaces with K-dim < K-Ind. In a recent paper we have combined an old construction by P. Vopěnka with a new construction by V. A. Chatyrko, and have assigned a certain compact space Z (X, Y) to any pair of non-empty compact spaces X, Y. In this paper we investigate the behaviour of the four dimensions under the operation Z (X, Y). This enables us to construct more examples of compact Fréchet spaces which have prescribed values K-dim < K-Ind, L-dim < L-Ind, or K-Ind < |K|-Ind, and (connected) components of which are metrisable.
description: 24 pages, 1 figure
Biomaterials for intervertebral disc repair
Creators: name: Lee, Haeyeon
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Engineering--Biomedical
subject: Biomaterials
subject: Intervertebral disc

description: Each intervertebral disc (IVD) in the spine has an inner gel-like nucleus pulposus (NP) surrounded by an outer annulus fibrosus (AF). IVD degeneration has been linked to low back pain, a medical condition that affects millions of people and has significant socioeconomic consequences. The goal of this study was to assess the properties of different biomaterials to determine their utility in IVD repair strategies. Different compositions of gellan gum were investigated for NP repair. Through optimization of gellan gum properties, it was found that 2% (w/v) low acyl gellan gum had the best mechanical properties while having a suitable gelling temperature for cell encapsulation. When gellan gum, fibrin, and chitosan/gelatin/glycerol phosphate hydrogels were compared for sealing defects in the AF, it was found none could withstand pressures as high as intact IVDs. Therefore, a triphasic prototype construct composed of Kryptonite bone cement, gellan gum, and reinforcing fibre was evaluated to determine if it could contribute to AF repair. Whereas, it was found that constructs with sutures had better tensile properties than those with electrospun fibres, overall the current generation of constructs was not sufficient for AF repair. This thesis represents an important step in understanding the use of biomaterials for IVD repair.
Pressures of Hybridity: An Analysis of the Urban-Rural Nexus
Creators: name: Gondek, Prabhjote
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Urban and Regional Planning
subject: FOS: Social and economic geography
subject: urban sociology
subject: rural sociology
subject: urban-rural nexus
subject: urban-rural fringe

description: As cities expand their boundaries into surrounding territories, it has created a dilemma in how we understand the spaces on the outskirts of urban centres. Urban analysts and the general public are equally disenchanted with traditional dichotomies of urban and rural to describe these hybrid areas. Existing scholarly literature has addressed this shift through the use of concepts like suburbs, exurbs, and edge cities which represent the invasion of urban forms into rural areas. However, these concepts fail to capture the contested nature and hybridity of this territory where rural and urban confront each other through opposing values, interests and perceptions of the land. Rocky View County, surrounding the city of Calgary in Alberta, provides a significant case study of the clash between urban and rural. Following a mixed methods research protocol, this thesis moves the literature in new directions by utilizing discourse analysis and social constructionism to reveal the range of pressures, internal conflicts and competing interests within the county. Instead of the traditional distinctions between urban and rural, the term urban-rural nexus is proposed and described as a hybrid space that must be viewed as a distinct settlement type. Hybridity is understood as the coexistence of opposing urban and rural land uses and values that create conflict among multiple constituent groups holding different social interpretations of this shared space. This thesis breaks new ground by offering an alternative analytical framework through the dimensions of conflict approach to identify and investigate the multifaceted nature of conflict in the urban-rural nexus.
Extreme events in the dispersions of two neighboring particles under the influence of fluid turbulence
Creators: name: Scatamacchia, R.
name: Biferale, L.
name: Toschi, F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present a numerical study of two-particle dispersion from point-sources in 3D incompressible Homogeneous and Isotropic turbulence, at Reynolds number Re \simeq 300. Tracer particles are emitted in bunches from localized sources smaller than the Kolmogorov scale. We report the first quantitative evidence, supported by an unprecedented statistics, of the deviations of relative dispersion from Richardson's picture. Deviations are due to extreme events of pairs separating much faster than average, and of pairs remaining close for long times. The two classes of events are the fingerprint of complete different physics, the former being dominated by inertial subrange and large-scale fluctuations, while the latter by the dissipation subrange. A comparison of relative separation in surrogate white-in-time velocity field, with correct viscous-, inertial- and integral-scale properties allows us to assess the importance of temporal correlations along tracer trajectories.
description: 5 pages, 6 figures
Numerical Modeling of Time‐lapse Electrical Resistivity Data for Improved Imaging of Managed Aquifer Recharge
Creators: name: Ferguson, Curtis Matthew
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Time‐lapse electrical resistivity tomography (ERT) is becoming more useful for identifying spatial and temporal variability in unsaturated flow and transport processes. This research is focused on the numerical forward modeling of synthetic time‐lapse ERT data to simulate the response of a Managed Aquifer Recharge (MAR) pond in the Pajaro Valley, California. One of the issues identified at this site is that during the operation of the pond there is a time‐varying water layer, which has a large effect on the ERT data. We illustrate through forward modeling scenarios that small positional errors in either pond stage or topography will create large misfits between observed and calculated ERT data resulting in inversion artifacts. We develop a method to improve the accuracy of the pond stage or topographic positions by 1) estimating the time of electrode wetting for a subset of time‐lapse ERT data and, 2) applying a correction to the model by adjusting the stage height or electrode positions accordingly. Although the developed framework has some limitations, it has potential to improve MAR imaging capabilities at this site.
Additional file 1 of Impact of an end-of-fourth-year emergency medicine bootcamp
Creators: name: Lewis, Jason J.
name: Grossestreuer, Anne V.
name: Ullman, Edward A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1:. Emergency Medicine Bootcamp Curriculum
Accessing High Momentum States In Lattice QCD
Creators: name: Roberts, Dale S.
name: Kamleh, Waseem
name: Leinweber, Derek B.
name: Mahbub, M. S.
name: Menadue, Benjamin J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Two measures are defined to evaluate the coupling strength of smeared interpolating operators to hadronic states at a variety of momenta. Of particular interest is the extent to which strong overlap can be obtained with individual high-momentum states. This is vital to exploring hadronic structure at high momentum transfers on the lattice and addressing interesting phenomena observed experimentally. We consider a novel idea of altering the shape of the smeared operator to match the Lorentz contraction of the probability distribution of the high-momentum state, and show a reduction in the relative error of the two-point function by employing this technique. Our most important finding is that the overlap of the states becomes very sharp in the smearing parameters at high momenta and fine tuning is required to ensure strong overlap with these states.
description: 10 pages
Review of the Laguerre-Gauss mode technology research program at Birmingham
Creators: name: Fulda, Paul
name: Bond, Charlotte
name: Brown, Daniel
name: Brückner, Frank
name: Carbone, Ludovico
name: Chelkowski, Simon
name: Hild, Stefan
name: Kokeyama, Keiko
name: Wang, Mengyao
name: Freise, Andreas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Gravitational wave detectors from the advanced generation onwards are expected to be limited in sensitivity by thermal noise of the optics, making the reduction of this noise a key factor in the success of such detectors. A proposed method for reducing the impact of this noise is to use higher-order Laguerre-Gauss (LG) modes for the readout beam, as opposed to the currently used fundamental mode. We present here a synopsis of the research program undertaken by the University of Birmingham into the suitability of LG mode technology for future gravitational wave detectors. This will cover our previous and current work on this topic, from initial simulations and table-top LG mode experiments up to implementation in a prototype scale suspended cavity and high-power laser bench.
Promoting scientific thinking with robots
Creators: name: Carbajal, Juan Pablo
name: Assaf, Dorit
name: Benker, Emanuel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics Education (physics.ed-ph)
subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This article describes an exemplary robot exercise which was conducted in a class for mechatronics students. The goal of this exercise was to engage students in scientific thinking and reasoning, activities which do not always play an important role in their curriculum. The robotic platform presented here is simple in its construction and is customizable to the needs of the teacher. Therefore, it can be used for exercises in many different fields of science, not necessarily related to robotics. Here we present a situation where the robot is used like an alien creature from which we want to understand its behavior, resembling an ethological research activity. This robot exercise is suited for a wide range of courses, from general introduction to science, to hardware oriented lectures.
description: Conference paper, 2 figures
Additional file 2 of Impact of an end-of-fourth-year emergency medicine bootcamp
Creators: name: Lewis, Jason J.
name: Grossestreuer, Anne V.
name: Ullman, Edward A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2:. Weekly Bootcamp Schedule
AD-NEGF: An End-to-End Differentiable Quantum Transport Simulator for Sensitivity Analysis and Inverse Problems
Creators: name: Zhou, Yingzhanghao
name: Chen, Xiang
name: Zhang, Peng
name: Wang, Jun
name: Wang, Lei
name: Guo, Hong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Machine Learning (cs.LG)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Since proposed in the 70s, the Non-Equilibrium Green Function (NEGF) method has been recognized as a standard approach to quantum transport simulations. Although it achieves superiority in simulation accuracy, the tremendous computational cost makes it unbearable for high-throughput simulation tasks such as sensitivity analysis, inverse design, etc. In this work, we propose AD-NEGF, to our best knowledge the first end-to-end differentiable NEGF model for quantum transport simulations. We implement the entire numerical process in PyTorch, and design customized backward pass with implicit layer techniques, which provides gradient information at an affordable cost while guaranteeing the correctness of the forward simulation. The proposed model is validated with applications in calculating differential physical quantities, empirical parameter fitting, and doping optimization, which demonstrates its capacity to accelerate the material design process by conducting gradient-based parameter optimization.
description: 13 pages including references
Modeling Scenarios for Alberta's Power Generation Future
Creators: name: Hasan, Md Raied
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Electronics and Electrical
subject: Engineering--Environmental
subject: Emissions
subject: Projections
subject: Electricity
subject: Alberta
subject: Grid
subject: Greehouse gas
subject: Cost
subject: CanESS

description: Concerns about large greenhouse gas (GHG) emissions in Alberta (AB) have challenged its public license to recover and export its vast fossil energy resources. To explore solutions, an energy system modelling approach was used to compare three scenarios for AB's electricity future: one coal-dominated "business-as-usual" (BAU), one natural gas-dominated scenario from AB Electric System Operator (AESO) and one dominated by large imported hydro (Low Carbon scenario). The Low Carbon scenario was estimated to reduce GHG emissions up to 2.1 GtCO2e by 2060, at a carbon cost that ranged from -7.28 to 54.28 $/tCO2e, with lower costs and enhanced benefits post 2060. Additional benefits of interprovincial cooperation in the supply of power to AB may include peak load sharing, reduced emissions for oil and gas recovery and processing and the creation of energy corridors that would provide access to international markets for other energy resources.
Nonequilibrium effects in hadronic fireball expansion
Creators: name: Satarov, L. M.
name: Larionov, A. B.
name: Mishustin, I. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We consider a spherical volume of hot and dense hadronic matter (fireball) expanding into a vacuum. It is assumed that initially the fireball matter is in local thermal and chemical equilibrium with vanishing collective velocity. The time evolution of the fireball is studied in parallel within the GiBUU transport model and an ideal hydrodynamic model. The equation of state of an ideal hadronic gas is used in the hydrodynamic calculation. The same set of hadronic species is used in transport and fluid-dynamical simulations. Initial coordinates and momenta of hadrons in transport simulations have been randomly generated by using the Fermi and Bose distributions for (anti)baryons and mesons. The model results for radial profiles of densities and collective velocities of different hadronic species are compared at different times. We find that two considered models predict essential differences in time evolution of hadron abundances, which are especially pronounced for hyperonic species. This gives an evidence of a strong deviation from chemical equilibrium in expanding hadronic matter.
description: 23 pages, 12 figures
Additional file 3 of Impact of an end-of-fourth-year emergency medicine bootcamp
Creators: name: Lewis, Jason J.
name: Grossestreuer, Anne V.
name: Ullman, Edward A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3:. End of Bootcamp Course Evaluation
A quantitative proteomics analysis of human cells undergoing apoptosis
Creators: name: Anthony, Joseph Stephan
Publisher: name: University of British Columbia
Year: 2010

description: Elucidating the events and mechanism of regulation of apoptosis is of wide interest to the scientific community, and to humanity, since apoptosis, so important for proper development and maintenance of an organism, is also responsible for disease when the process goes awry. In this thesis, a proteomics investigation into changes in protein concentrations and half-lives in early apoptosis is presented, enhancing our understanding of this process. Using Stable Isotope Labeling with Amino Acids in Cell Culture (SILAC), cytokine withdrawal-induced apoptosis of a human hematopoietic cell line, TF-1, was studied. This is a useful model in which signaling pathways regulating apoptosis have been extensively studied previously. A study such as this can be considered “hypothesis-generating”, but at the outset the hypothesis is that proteins whose functions are closely tied to regulation of apoptosis will show detectable changes in quantity in cells undergoing apoptosis. Initially three biological replicates were performed, comprising 200 samples in all, analyzed using an FT-ICR mass spectrometer. Relative abundance of 1451 proteins identified in common between three biological replicates was determined, and 124 proteins showing the largest concentration changes in response to cytokine withdrawal are discussed in more detail. A subsequent effort investigated protein half-life changes in response to cytokine withdrawal and identified 255 proteins for which half-lives were calculated. The apparent changes in protein half-life in response to cytokine withdrawal are discussed. A high level of coverage of the proteome was achieved, giving a large number of protein identifications and relative quantitations. Further I have been able to identify several apparently synchronous changes in concentration between proteins with related functions, suggesting possible interactions not previously described, or identified as playing a role in cell survival, proliferation or death. Further, I observed cytokine withdrawal-induced alterations in concentration in some proteins for which little is known. The proteomic analysis of apoptosis using SILAC to determine protein half-life data is also a novel approach. Together, the work in this thesis suggests numerous avenues of investigation potentially leading to novel findings regarding cells undergoing apoptosis; and also suggests a potentially fruitful avenue of investigation for clinical management of patients undergoing chemotherapy.
The recovery of plant community composition following passive restoration across spatial scales
Creators: name: Ladouceur, Emma
name: Isbell, Forest
name: Clark, Adam T.
name: Harpole, Stan
name: Reich, Peter B.
name: Tilman, G. David
name: Chase, Jonathan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 580

description: Human impacts have led to dramatic biodiversity change which can be highly scale-dependent across space and time. A primary means to manage these changes is via passive (here, the removal of disturbance) or active (management interventions) ecological restoration. The recovery of biodiversity, following the removal of disturbance, is often incomplete relative to some kind of reference target. The magnitude of recovery of ecological systems following disturbance depends on the landscape matrix and many contingent factors. Inferences about recovery after disturbance and biodiversity change depend on the temporal and spatial scales at which biodiversity is measured. We measured the recovery of biodiversity and species composition over 33 years in 17 temperate grasslands abandoned after agriculture at different points in time, collectively forming a chronosequence since abandonment from 1 to 80 years. We compare these abandoned sites with known agricultural land-use histories to never-disturbed sites as relative benchmarks. We specifically measured aspects of diversity at the local plot-scale (α-scale, 0.5 m2) and site-scale (γ-scale, 10 m2), as well as the within-site heterogeneity (β-diversity) and among-site variation in species composition (turnover and nestedness). At our α-scale, sites recovering after agricultural abandonment only had 70% of the plant species richness (and ~30% of the evenness), compared to never-ploughed sites. Within-site β-diversity recovered following agricultural abandonment to around 90% after 80 years. This effect, however, was not enough to lead to recovery at our γ-scale. Richness in recovering sites was ~65% of that in remnant never-ploughed sites. The presence of species characteristic of the never-disturbed sites increased in the recovering sites through time. Forb and legume cover declines in years since abandonment, relative to graminoid cover across sites. Synthesis. We found that, during the 80 years after agricultural abandonment, old fields did not recover to the level of biodiversity in remnant never-ploughed sites at any scale. β-diversity recovered more than α-scale or γ-scale. Plant species composition recovered, but not completely, over time, and some species groups increased their cover more than others. Patterns of ecological recovery in degraded ecosystems across space and long time-scales can inform targeted active restoration interventions and perhaps, lead to better outcomes.
An investigation into human predation : an overlooked area of research
Creators: name: Chilton, Makenzie Eileen Evelyn
Publisher: name: University of British Columbia
Year: 2010

description: Research on human predatory behaviour is comparatively narrow in focus as it mainly constitutes studying stalkers, whose behaviour normally has some basis in attachment. The current research aims to test changes in emotion based on a form of predation unrelated to attachment. Subjects’ (N=144) affective responses to viewing a predation sequence from different points of view were obtained by completing the affect adjective checklist pre and post video. A significant main effect of gender and condition was found. When male participants viewed a male target during the predation sequence their percentage increase in composite anger score was the highest (110.17%) compared to all other groups.
Security Challenges of States Building Crisis in West Africa since 1955
Creators: name: Shamvu, Mulago Jean-Pierre
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: History--African
subject: Military Studies
subject: Political Science--International Law and Relations
subject: West Africa
subject: Security
subject: International Relations
subject: Peace and security
subject: Conflict

description: West African states have been struggling to build their nation-states since the independences that started in 1957. The same ills that struck these states since the beginning seem to have stuck with them despite several attempts at healing them. Instead of modern and prosperous states, people are witnessing the chronic weakness of their states. This research seeks to contribute to the understanding of states’ weakness in West Africa and to the analysis of possible solutions to address the problem. The opening chapter sets the stage of the research by introducing the phenomenon of states’ weakness in West Africa. The next chapter looks at the literature that deals with states power and weakness. The frames of analysis used to evaluate these states’ strength and weaknesses are also introduced in this chapter. These are the critical mass, political skills, economic wealth, military and security assets. These resources offer a view of a state’s potential. Chapter three delves on some of the causes of West African states’ weakness. These states are weak because of the structures and internal socio-political dynamics within them. Some other causes of their weakness come from the global powers’ influences. The last section of the chapter offers an overview of how the Cold War (1945-1989) influenced events in the sub region. The political environment of overlay by global powers shapes considerably the states under study. Security Reform and Governance is posited as the solution to the lack of capacity of West African states. Chapter four of this work delves on this subject. The security sector covers most state’s institutions that need to be reformed in West Africa. The closing chapter demonstrates how the Economic Community of West African States is a nascent security community. Its security architecture endorses the Security Sector Governance mechanism and therefore stands a better chance of strengthening member states if provided with the needed resources.
Non-perturbative Lee-Wick gauge theory: Towards Confinement and RGE with strong couplings
Creators: name: Frasca, Marco
name: Ghoshal, Anish
name: Koshelev, Alexey S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a non-Abelian Lee--Wick gauge theory and discuss Becchi-Rouet-Stora-Tyutin (BRST) invariance. It contains fourth-order derivative as extensions of the kinetic term, leading to massive ghosts in the theory upon quantization. We particularly provide essential clues towards confinement conditions in strongly-coupled regimes, using the Kugo-Ojima approach, and obtain the $β-$functions in the non-perturbative regimes. This is achieved using a set of exact solutions of the corresponding local theory in terms of Jacobi elliptical functions. We obtain a similar $β-$function just as for the ordinary Yang-Mills theory but the main differences are that now, the cut-off arises naturally from the Lee-Wick heavy mass scales (M). We show that the fate of the ghosts is fixed in these regimes: they are no more the propagating degrees of freedom in the infrared (IR)-limit. As it also happens for the ordinary case, confinement is due to the non-Abelian nature of the theory. In the limit $M\rightarrow\infty $, one recovers the standard results for the local non-Abelian Yang-Mills theory.
description: 28 pages, 1 figure. Version accepted for publication in Classical and Quantum Gravity. arXiv admin note: text overlap with arXiv:2106.07629
Analysis of Various Symbol Detection Techniques in Multiple-Input Multiple-Output System (MIMO)
Creators: name: Yadav, Shrikrishan
name: Jani, Shuchi
name: Pal, B. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Wireless communication is the fastest growing area of the communication industry. To keep swiftness with the indefinite increase in customers' demands and expectations, and the market competition among companies for the services offered,there is need for higher data rate along with reliable communication at low cost so that the applications can reach all. Until now, many technical challenges remain in designing robust and fast wireless systems that deliver the performance necessary to support emerging applications, due to the fact that wireless channels are frequency selective, power-limited, susceptible to noise and interference. Demand for high data rate and increasing applications offered by a wireless device calls for an effective method. Due to limit on the available bandwidth, there is a need for exploiting the available bandwidth in a way so that we get maximum advantage. Multiple-Input Multiple-Output system does exactly this thing by multiplying the data rate without any expansion in the bandwidth. This system utilizes the spatial diversity property of the multi channel system. The reliable transmission requires symbols to be effectively recovered at the receiving end. V-BLAST detection technique is employed for this purpose. This paper depicted the advantages of using multiple antennas by exploiting signal diversity offered by multipath effect and the system offers high spectral efficiency.
description: 11 pages,9 figures
Additional file 4 of Impact of an end-of-fourth-year emergency medicine bootcamp
Creators: name: Lewis, Jason J.
name: Grossestreuer, Anne V.
name: Ullman, Edward A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 4:. Emergency Medicine Bootcamp New Intern Survey
The role of serotonin in photic phase shifting: location of action and molecular underpinnings
Creators: name: Smith, Victoria
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Psychology--Behavioral
subject: Circadian rhythms
subject: Serotonin
subject: BMY7378
subject: Buspirone
subject: Period genes
subject: Immediate-early genes
subject: Biochemical cascades

description: The serotonergic system modulates the effects of light on the mammalian circadian system. Some serotonergic drugs can greatly enhance the magnitude of the effect light has on shifting the circadian clock. BMY7378, a 5-HT1A mixed agonist/antagonist, enhances photic phase shifts when administered in the late subjective night in hamsters, but not mice. In hamsters, BMY7378 binding directly to receptors in the median raphe nucleus (MRN) appears to be necessary for this effect, but binding in the suprachiasmatic nuclei (SCN) does not appear to be necessary, nor are the serotonergic fibers connecting the MRN directly to the SCN necessary. In order to produce its photic phase shift enhancement effect, BMY7378 alters the activation of some biochemical cascade components, as well as the expression of some genes that are activated or expressed following light exposure in the late subjective night. Buspirone, a 5-HT1A partial agonist, normally attenuates photic phase shifts when administered during the late subjective night, but instead enhances phase shifts in mice lacking the 5-HT1A receptor. The activation of some biochemical cascade components and genes expressed following light exposure are differentially altered following Buspirone administration, depending on whether there was an attenuation or potentiation of photic phase shifts, with or without the 5-HT1A receptors respectively. Together, these results exemplify the complexity of the ability of the serotonergic system to modulate the effects that light stimuli have on the expression of mammalian circadian rhythms.
Stability analysis of microscopic models for traffic flow with lane changing
Creators: name: Piu, Matteo
name: Puppo, Gabriella
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: This paper investigates the mathematical modeling and the stability of multi-lane traffic in the microscopic scale, studying a model based on two interaction terms. To do this we propose simple lane changing conditions and we study the stability of the steady states starting from the model in the one-lane case and extending the results to the generic multi-lane case with the careful design of the lane changing rules. We compare the results with numerical tests, that confirm the predictions of the linear stability analysis and also show that the model is able to reproduce stop & go waves, a typical feature of congested traffic.
Analysis of a fully discrete approximation to a moving-boundary problem describing rubber exposed to diffusants
Creators: name: Nepal, Surendra
name: Wondmagegne, Yosief
name: Muntean, Adrian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M15, 65M60, 35R37

description: We present a fully discrete scheme for the numerical approximation of a moving-boundary problem describing diffusants penetration into rubber. Our scheme utilizes the Galerkin finite element method for the space discretization combined with the backward Euler method for the time discretization. Besides dealing with the existence and uniqueness of solution to the fully discrete problem, we derive a \textit{a priori} error estimate for the mass concentration of the diffusants, and respectively, for the position of the moving boundary. Numerical illustrations verify the obtained theoretical order of convergence in physical parameter regimes.
description: 20 pages, 2 figures, 2 tables
Annihilator ideals of graph algebras
Creators: name: Vas, Lia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Rings and Algebras (math.RA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 16S88, 16D25, 16D80, 46L55

description: If $I$ is a (two-sided) ideal of a ring $R$, we let $\operatorname{ann}_l(I)=\{r\in R\mid rI=0\},$ $\operatorname{ann}_r(I)=\{r\in R\mid Ir=0\},$ and $\operatorname{ann}(I)=\operatorname{ann}_l(I)\cap \operatorname{ann}_r(I)$ be the left, the right and the double annihilators. An ideal $I$ is said to be an annihilator ideal if $I=\operatorname{ann}(J)$ for some ideal $J$ (equivalently, $\operatorname{ann}(\operatorname{ann}(I))=I$). We study annihilator ideals of Leavitt path algebras and graph $C^*$-algebras. Let $L_K(E)$ be the Leavitt path algebra of a graph $E$ over a field $K.$ If $I$ is an ideal of $L_K(E),$ it has recently been shown that $\operatorname{ann}(I)$ is a graded ideal (with respect to the natural grading of $L_K(E)$ by $\mathbb Z$). We note that $\operatorname{ann}_l(I)$ and $\operatorname{ann}_r(I)$ are also graded. For a graded ideal $I,$ we describe $\operatorname{ann}(I)$ in terms of the properties of a pair of sets of vertices of $E,$ known as an admissible pair, which naturally corresponds to $I.$ Using such a description, we present properties of $E$ which are equivalent with the requirement that each graded ideal of $L_K(E)$ is an annihilator ideal. We show that the same properties of $E$ are also equivalent with each of the following conditions: (1) The lattice of graded ideals of $L_K(E)$ is a Boolean algebra; (2) Each closed gauge-invariant ideal of $C^*(E)$ is an annihilator ideal; (3) The lattice of closed gauge-invariant ideals of $C^*(E)$ is a Boolean algebra. In addition, we present properties of $E$ which are equivalent with each of the following conditions: (1) Each ideal of $L_K(E)$ is an annihilator ideal; (2) The lattice of ideals of $L_K(E)$ is a Boolean algebra; (3) Each closed ideal of $C^*(E)$ is an annihilator ideal; (4) The lattice of closed ideals of $C^*(E)$ is a Boolean algebra.
description: This version is to appear in the Journal of Algebraic Combinatorics
Additional file 5 of Impact of an end-of-fourth-year emergency medicine bootcamp
Creators: name: Lewis, Jason J.
name: Grossestreuer, Anne V.
name: Ullman, Edward A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 5:. Emergency Medicine Bootcamp Program Director Survey
Exploring the Professional Role of Massage Therapists in Patient Care in Canadian Urban Hospitals – A Mixed Methods Study
Creators: name: Kania-Richmond, Anna
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Health Care Management
subject: massage therapy
subject: complementary, alternative, and integrative medicine
subject: role
subject: hospital care

description: Background: Massage therapy (MT) is becoming established as a recognized health care profession. MT services are being incorporated into various types of health care settings, including hospitals. However, little is known about the delivery of MT services and the role of massage therapists in patient care in hospitals in the Canadian context. Purpose: The purpose of this study was to conduct a comprehensive examination of massage therapy incorporation into Canadian urban hospitals. Methods: A mixed methods study design was used. The quantitative phase (survey) and qualitative phase (semi-structured interviews) were conducted sequentially, with an emphasis on the qualitative phase. The survey was conducted in settings where MT services were organized by hospitals and provided by licensed massage therapists to patients. Semi-structured interviews were conducted with a purposively diverse sample of participants. The quantitative and qualitative approaches were mixed during data collection and analysis. Results: Sixteen urban hospitals across Canada (5%) provided MT to patients by licensed therapists. The majority of hospitals were located in Ontario and ranged from specialized small community hospitals to large multi-site hospitals. Three MT delivery approaches emerged: stand-alone, closed-incorporated, and open-incorporated. In addition to clinical functions as health care providers and team members, components of the massage therapists’ professional role included: program support, educator, promotor, and researcher. Role related experiences suggested the presence of ambiguity regarding the massage therapists’ role, overlap with other health care professionals (HCPs), role overload related to limited availability of time and massage staff, and role conflict. Patterns suggesting variations in the role components and types of role experiences across study sites and in relation to team member status were apparent. However, the small sample size precluded further analysis of these potential differences. Conclusions: While hospital-based MT in Canada is not a new phenomenon, MT is not yet an established health care profession in hospitals. However, there is significant potential for the inclusion of the MT role in Canadian hospitals that should be research-informed for effective implementation.
Optimizing the energy threshold of light detectors coupled to luminescent bolometers
Creators: name: Piperno, G.
name: Pirro, S.
name: Vignati, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Bolometers have proven to be good detectors for the search of neutrinoless double beta decay. By operating at cryogenic temperatures, they feature excellent energy resolution and low background. The detection of the possible light emitted when particles interact in the bolometer is a promising method to lower the background of the experiments. The different amount of light emitted in beta/gamma and alpha interactions, whether due to scintillation or Cerenkov emission, allows to discriminate the two interaction types. Because of the cryogenic environment, light detectors are often bolometers. In this work we present a software algorithm to lower the energy threshold of bolometric light detectors coupled to luminescent bolometers. The application to data from Ge light detectors coupled to ZnMoO4 and TeO2 bolometers shows that the energy threshold can be lowered substantially, increasing the discrimination power when the amount of emitted light is small.
description: 12 pages, 8 figures
Semantic interpretation for convolutional neural networks: What makes a cat a cat?
Creators: name: Xu, Hao
name: Chen, Yuntian
name: Zhang, Dongxiao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The interpretability of deep neural networks has attracted increasing attention in recent years, and several methods have been created to interpret the "black box" model. Fundamental limitations remain, however, that impede the pace of understanding the networks, especially the extraction of understandable semantic space. In this work, we introduce the framework of semantic explainable AI (S-XAI), which utilizes row-centered principal component analysis to obtain the common traits from the best combination of superpixels discovered by a genetic algorithm, and extracts understandable semantic spaces on the basis of discovered semantically sensitive neurons and visualization techniques. Statistical interpretation of the semantic space is also provided, and the concept of semantic probability is proposed for the first time. Our experimental results demonstrate that S-XAI is effective in providing a semantic interpretation for the CNN, and offers broad usage, including trustworthiness assessment and semantic sample searching.
description: 33 pages, 11 figures
LEXICOGRAPHIC STUDY OF LINGUISTIC TERMS IN ENGLISH AND UZBEK LANGUAGES
Creators: name: Jurayeva, Sarvinoz
Publisher: name: Zenodo
Year: 2023

description: A lexicographic study of linguistic terms in the English and Uzbek languages involves examining the vocabulary and terminology specific to the field of linguistics within each language. This study encompasses compiling, analyzing, and comparing linguistic terms, their meanings, usage, and linguistic structures in English and Uzbek. Here's an overview of such a study and its key components.
Delta-Sigma Modulator for Wideband and Multi-Band Radio Systems
Creators: name: Rahman, Sharif Abdur
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Electronics and Electrical
subject: Delta-Sigma Modulation
subject: Spectrum Aggregation
subject: Parallel Processing
subject: Frequency Band Decomposition
subject: Transceiver
subject: Analog-to-Digital Converter
subject: Digital-to-Analog Converter

description: The proliferation of modern communication systems places stringent requirements on analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) to operate on wideband signals while being power and resource efficient. In this thesis, the utilization of delta-sigma modulators for wideband and multi-band applications in both the receiver and transmitter is addressed. The first model proposes a low-complexity frequency band decomposition-based parallel DSM ADC architecture which lowers the resource consumption considerably compared to the conventional QMF-FBD ADC and maintains an acceptable SNDR. An FPGA implementation and resource estimation of the proposed model was performed as a proof of concept. The second model presents a concurrent dual band DSM architecture for spectrum aggregation transmitter application and provides a comprehensive analysis of step-by-step design process. The quantization noise is shaped in this architecture enabling concurrent transmission of two signals with low in-band noise interference. Simulation was performed with two carrier frequency bands of LTE signals as proof of theory.
Families of non-tiling domains satisfying Pólya's conjecture
Creators: name: Freitas, Pedro
name: Salavessa, Isabel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 35P15 (Primary), 35J05, 35J25, 35P20 (Secondary)

description: We show the existence of classes of non-tiling domains satisfying Pólya's conjecture in any dimension, in both the Euclidean and non-Euclidean cases. This is a consequence of a more general observation asserting that if a domain satisfies Pólya's conjecture eventually, that is, for a sufficiently large order of the eigenvalues, and may be partitioned into $p$ non-overlapping isometric sub-domains, with $p$ arbitrarily large, then there exists an order $p_{0}$ such that for $p$ larger than $p_{0}$ all such sub-domains satisfy Pólya's conjecture. In particular, this allows us to show that families of sectors of domains of revolution with analytic boundary, and thin cylinders satisfy Pólya's conjecture, for instance. We also improve upon the Li-Yau constant for general cylinders in the Dirichlet case.
description: This version 9 pages. Corrected some misprints and added some more examples