cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Parteinahme Barbarossas gegen die Stadt Mailand 1154-1155
Creators: name: Prinz zu Löwenstein, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Friedrich II.
Barbarossa,
Milan
Mailand

description: The work examines three contemporary sources on the first Italian campaign of king Frederick I, called Barbarossa, in 1154 and 1155, namely as to how they explain Barbarossa's immediate positioning against the city of Milan and ensuing warfare. Contrary to a widespread opinion in literature, the author considers as implausible the account of Otto Morena, according to which complaints of merchants of the city of Lodi about Milanese encroachments and a subsequent defiance of a royal envoy were causal, and also the official reasoning in Otto of Freising about improprieties of the Milanese during the first encounters. The author follows the account in the Narratio of an unknown Milanese author, according to which pure power logic was decisive: the king wanted to assert his authority during this first Italian campaign in 100 years.
Edge and waveguide THz surface plasmon modes in graphene micro-ribbons
Creators: name: Nikitin, A. Yu.
name: Guinea, F.
name: Garcia-Vidal, F. J.
name: Martin-Moreno, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Surface plasmon modes supported by graphene ribbon waveguides are studied and classified. The properties of both modes with the field concentration within the ribbon area (waveguiding modes) and on the edges (edge modes) are discussed. The waveguide and edge modes are shown to be separated from each other by a gap in wavenumbers. The even-parity hybridized edge mode results to be the fundamental electromagnetic mode of the ribbon, possessing also the lowest losses. All the plasmonic modes in the ribbons have an optimum frequency, at which the absorption losses are minimum, due to competition between the plasmon confinement and the frequency dependence of absorption in graphene.
description: 4 pages, 4 figures
MODERN APPROACH TO THE PRESCHOOL EDUCATION SYSTEM
Creators: name: Karimova, Shoiraxon
name: Dadaboyeva, Dilso'zxon
name: Isroilova, Muslima
Publisher: name: Zenodo
Year: 2023

description: This article will talk about innovations in the preschool education system that is developing in our country, the huge reforms being carried out, the development of new emerging preschool educational organizations, Family non-governmental and private kindergartens, measures to further increase the coverage of the child in the preschool education system.
Transcriptional Mediators of Growth and Survival in Response to Nutritional Cues in Drosophila
Creators: name: Killip, Lauren
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biology--Molecular
subject: Drosophila
subject: Growth
subject: Survival
subject: Nutrition
subject: Signaling

description: Dietary nutrition is required for growth in all animals. When nutrients are abundant, animals increase metabolism to drive growth and proliferation. When nutrients are limited, animals must decrease metabolic processes to conserve energy and promote survival. The evolutionarily conserved Insulin/PI3K and TOR pathways are two important signaling pathways involved in coordinating nutrient availability with the physiological processes that mediate growth and survival. However, the effectors that act downstream of the pathways to control these processes, particularly in vivo, are only beginning to be understood. The fruit fly, Drosophila melanogaster, is one key model system that is used to identify conserved regulatory mechanisms. In this study I explored novel roles for two transcription factors in mediating growth and survival in response to variations in nutrient levels in Drosophila. In the first part of my study, I explored the role of the transcription factor DREF in mediating response to high nutrient levels. I found that in conditions of high amino acid availability DREF is required for cell autonomous growth downstream of the TOR pathway. I identified the transcriptional regulation of protein synthesis and ribosome biogenesis genes as one mechanism by which DREF mediates growth. I also found that DREF expression in one larval tissue, the nutrient sensing fat-body, is required for non-autonomous growth, through a mechanism that influences systemic insulin signaling. In the second part of my study, I used an RNAi screen in Drosophila larvae to identify genes that are required to maintain organismal survival in conditions of nutrient deprivation. I found that loss of the transcription factor Hairy led to starvation sensitivity. I further found that hairy mRNA levels are increased upon starvation, and that this is dependent on inhibition of Insulin/PI3K pathway activity. In addition, I explored potential transcriptional targets of Hairy that may be important in mediating starvation survival. The results contained in this thesis further our understanding of the mechanisms used to couple nutrition availability to metabolic processes in animals. Both DREF and Hairy are conserved in humans and further studies will explore whether these proteins act similarly in higher eukaryotes.
Analytic models for albedos, phase curves and polarization of reflected light from exoplanets
Creators: name: Madhusudhan, Nikku
name: Burrows, Adam
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: New observational facilities are becoming increasingly capable of observing reflected light from transiting and directly imaged extrasolar planets. In this study, we provide an analytic framework to interpret observed phase curves, geometric albedos, and polarization of giant planet atmospheres. We compute the observables for non-conservative Rayleigh scattering in homogeneous semi-infinite atmospheres using both scalar and vector formalisms. In addition, we compute phase curves and albedos for Lambertian, isotropic, and anisotropic scattering phase functions. We provide analytic expressions for geometric albedos and spherical albedos as a function of the scattering albedo for Rayleigh scattering in semi-infinite atmospheres. Given an observed geometric albedo our prescriptions can be used to estimate the underlying scattering albedo of the atmosphere, which in turn is indicative of the scattering and absorptive properties of the atmosphere. We also study the dependence of polarization in Rayleigh scattering atmospheres on the orbital parameters of the planet-star system, particularly on the orbital inclination. We show how the orbital inclination of non-transiting exoplanets can be constrained from their observed polarization parameters. We consolidate the formalism, solution techniques, and results from analytic models available in the literature, often scattered in various sources, and present a systematic procedure to compute albedos, phase curves, and polarization of reflected light.
description: Accepted for publication in ApJ, 17 pages in emulate ApJ
Place recognition and heading retrieval are mediated by dissociable cognitive systems in mice
Creators: name: Julian, Joshua B
name: Keinath, Alexander T
name: Muzzio, Isabel A
name: Epstein, Russell A
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: Uncategorized

description: Significance The ability to recover one’s bearings when lost is critical for successful navigation. To accomplish this feat, a navigator must identify its current location (place recognition), and it must also recover its facing direction (heading retrieval). Using a novel behavioral paradigm, we demonstrate that mice use one set of cues to determine their location and then ignore these same cues when determining their heading, although the cues are informative in both cases. These results suggest that place recognition and heading retrieval are mediated by different processing systems that operate in partial independence of each other. This finding has important implications for understanding the cognitive architecture underlying spatial navigation.
Bouncing Back from Bullying: Resilience and Benefit-Finding in Victims of Bullying
Creators: name: Fraccaro, Rebecca
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Educational Psychology
subject: Bullying
subject: resilience
subject: Benefit-Finding

description: The present study investigates the role of resilience and benefit-finding in facilitating victims’ “bouncing back” from school bullying. A sample of 200 students from the University of Calgary participated in the present study. Results indicate that trait-resilience significantly predicted victims’ well-being, suggesting that resilience may partially explain why some victims of bullying successfully “bounce back.” Additionally, trait-resilience significantly predicted victims’ benefit-finding, indicating that benefit-finding may be a behaviour associated with resilience in the context of bullying. Lastly, results of a mediation model suggest that benefit-finding may partially explain why victims who are high in trait-resilience exhibit positive well-being following bullying experiences. Results also suggest a potential difference between finding some emotional benefit of bullying experiences versus developing behavioural resilience (i.e., coping strategies) through bullying experiences. Implications for the field of school bullying and resilience are discussed as well as potential impacts on the development of interventions are discussed.
The role of talin in LFA-1 function in cell-mediated cytotoxicity
Creators: name: Mace, Emily Margaret
Publisher: name: University of British Columbia
Year: 2010

description: Natural killer (NK) cells and cytotoxic T lymphocytes (CTLs) are effectors of cell-mediated cytotoxicity towards virally infected and tumourigenic cells. The integrin leukocyte function associated antigen-1 (LFA-1) is required for the adhesion of effector cells to their targets. In addition, LFA-1 transduces signals resulting in actin polymerization. We show that in both CTLs and NK cells, LFA-1 ligand binding results in the recruitment of actin, the cytoskeletal adaptor talin, and the activator of actin nucleation Wiskott-Aldrich Syndrome protein (WASP). We used talin-knockout (KO) NK cells to demonstrate that talin is required for LFA-1 mediated adhesion and polarization towards the target cell. This actin polarization is a prerequisite for subsequent steps leading to cytotoxicity, including the translocation of cytotoxic granules. Further analysis of the LFA-1 mediated signaling that leads to actin polymerization shows that talin recruits proteins that catalyze de novo actin formation. Talin forms a complex with vinculin and the actin-nucleator Arp2/3, and talin is required for the movement of these proteins to LFA-1 following LFA-1 binding to ICAM-1. In addition, talin binds the phosphatidylinositol phosphate kinase PIPKIγ and talin is required for the localized production of phosphatidylinositol 4,5 bisphosphate (PIP₂) following LFA-1 ligation. This production of PIP₂ is required for the recruitment of WASP, which in turn activates Arp2/3 to polymerize actin. Thus we have demonstrated a critical role for talin in the actin polarization that is required for cell-mediated cytotoxicity and elucidated the mechanism of LFA-1 mediated actin polymerization.
Weak magnetic fields in early-type stars: failed fossils
Creators: name: Braithwaite, Jonathan
name: Cantiello, Matteo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Weak magnetic fields have recently been detected in Vega and Sirius. Here, we explore the possibility that these fields are the remnants of some field inherited or created during or shortly after star formation and, unlike true fossil fields, are still evolving as we observe them. The timescale of this evolution is given in terms of the Alfven timescale and the rotation frequency by tau_evol ~ tau_A^2 Omega, which would be comparable to the age of the star. It is shown that it is likely that all intermediate- and high-mass stars contain fields of at least the order of the strength found so far in Vega and Sirius. Faster rotators are expected to have stronger magnetic fields. Stars may experience an increase in field strength during their early main-sequence, but for most of their lives field strength will decrease slowly. The length scale of the magnetic structure on the surface may be small in very young stars but should quickly increase to at least very approximately a fifth of the stellar radius.
description: are welcome. Submitted to MNRAS. Five pages
ДИАБЕТИК ПОЛИНЕЙРОПАТИЯ  ТАСНИФИ ВА КЛИНИКАСИ
Creators: name: Хайдаров, Нодиржон
name: Ахророва, Шахло
Publisher: name: Zenodo
Year: 2023

description: Олиб борилган тадқиқотлар 1 тип қандли диабет билан касалланган беморларнинг фақат 25%и шифокор қабулида неврологик симптомлардан шикоят қилишини кўрсатади.  ДПН аниқланган беморлар 46% ҳолатларда  кузатилган ва у кўпинча касалликнинг давомийлигига боғлиқ бўлган.  1 тип  диабетнинг давомийлиги 5 йилдан кам бўлган ҳолатларда ДПНнинг  тарқалиши 2,4%ни,   5-10 йил давомийликда - 28,2%ни, касаллик  10 йилдан ортиқ давом этганда эса ДПН кузатилиши  69,4% ни ташкил этди. 1-тип  диабет билан оғриган беморларнинг 10,8% да вибрацион сезгининг пасайиши, 31,1% да Ахилл рефлексининг пасайиши ёки йўқолиши аниқланган. Энг кўп учрайдиган неврологик симптом болдир мушакларининг уюшиши, куйишиши ва мушак тиришишлари эканлиги аниқланган.
Révoltes et révoltés dans le théâtre de Sony Labou Tansi et de Michel Tremblay. Étude comparative entre La Parenthèse de sang, Je soussigné cardiaque et Les Belles-sœurs, Hosanna.
Creators: name: Milaney, Amy Lue
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Theater
subject: révolte
subject: theatre
subject: francophone
subject: Michel Tremblay
subject: Sony Labou Tansi
subject: Congo
subject: Québec

description: Comment parler du Congo et du Québec (de l’Afrique et du Canada) à partir de quelques pièces de théâtre ? Il s’agit de deux univers au passé et au présent difficiles qui font découvrir de grands écrivains dont les œuvres, sans être forcément les mêmes, ne sont pas totalement différentes. Comparer Sony Labou Tansi et Michel Tremblay peut aider à voyager d’un espace à l’autre, surtout qu’ils ont le même outil de travail : la langue française ; appartiennent à la même génération et ont sûrement les mêmes références littéraires. Le présent travail voudrait partir de ces différents éléments pour montrer qu’ayant la même frustration par rapport à un passé colonial qui a laissé des traces dans le présent, le Québec et le Congo présentent des points communs, que sont des formes de révoltes, des figures de révoltés que la littérature va, d’une manière ou d’une autre, mettre en scène.
HISTOLOGICAL STUDY OF CYCLOPHOSPHAMIDE ON HIPPOCAMPUS OF WISTAR RATS FOLLOWING THE ADMINSTRATION OF ALKALOIDS ISOLATED FROM DISCOREA BULBIFERA BULBIS
Creators: name: ENYE LINUS ANDERSON
name: SAKA OLUSOLA STEPHEN
name: FAURE ADEDAMOLA A
name: EDEM E EDEM
name: AYEGBUSI OLATEJU S
name: OGUNSANYA SANMI
name: SAKA A. A
Publisher: name: Zenodo
Year: 2023
Subjects: Cyclophosphamide, Alkaloid compound, Discorea Bulbifera, Hippocampus.

description: Abstract
Cyclophosphamide (CYC) is commonly used in cancer chemotherapy, which causes immunosuppression and tissue oxidative stress at high doses. To enhance the anti-cancer efficacy and reduce the toxicity of CTC, investigating potential adjuvant treatments that can attenuate the adverse effects has been demonstrated. This study explored potential effects of CYC on the hippocampal architechture following the administration of alkaloid isolated from Dioscorea bulbifera. Group A was made the control and given 0.14 ml distilled water for 14 days. Group B were be administered with Cyclophosphamide 150mg / kg only through intraperitoneal route (IP) for 7 days. Group C was administered with Cyclophosphamide 150 mg/ kg and 50 mg / kg of Alkaloid concomitantly for 7 days and Group D was administered Alkaloid for 7 days and then Cyclophosphamide of 150 mg / kg for 7 days. The Alkaloid compound was administered via oral gavage and cyclophosphamide was administered through IP. Administration of Cyclophosphamide (150 g/kg) induced major alterations and has promoted general alteration in the hippocampus and dentate gyrus; furthermore, we can conclude that the Alkaloids (50mg/kg) from Discorea Bulbifera treated the toxicity very minimally but a higher dose could have been more effective. Therefore, the administration of Cyclophosphamide should be strictly monitored and regularly evaluated in individuals treating cancer using this drugs in order to alleviate or prevent some of these alterations.
Aspiration Learning in Coordination Games
Creators: name: Chasparis, Georgios C.
name: Arapostathis, Ari
name: Shamma, Jeff S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: 68T05, 91A26, 91A22, 93E35, 60J05, 91A80

description: We consider the problem of distributed convergence to efficient outcomes in coordination games through dynamics based on aspiration learning. Under aspiration learning, a player continues to play an action as long as the rewards received exceed a specified aspiration level. Here, the aspiration level is a fading memory average of past rewards, and these levels also are subject to occasional random perturbations. A player becomes dissatisfied whenever a received reward is less than the aspiration level, in which case the player experiments with a probability proportional to the degree of dissatisfaction. Our first contribution is the characterization of the asymptotic behavior of the induced Markov chain of the iterated process in terms of an equivalent finite-state Markov chain. We then characterize explicitly the behavior of the proposed aspiration learning in a generalized version of coordination games, examples of which include network formation and common-pool games. In particular, we show that in generic coordination games the frequency at which an efficient action profile is played can be made arbitrarily large. Although convergence to efficient outcomes is desirable, in several coordination games, such as common-pool games, attainability of fair outcomes, i.e., sequences of plays at which players experience highly rewarding returns with the same frequency, might also be of special interest. To this end, we demonstrate through analysis and simulations that aspiration learning also establishes fair outcomes in all symmetric coordination games, including common-pool games.
description: 27 pages
Average Dielectric Property Analysis of Non-Uniform Structures: Tissue Phantom Development, Ultra-Wideband Transmission Measurements, and Signal Processing Techniques
Creators: name: Garrett, John Daniel
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Biomedical
subject: Engineering--Electronics and Electrical
subject: Dielectric Materials
subject: Dielectric Measurements
subject: Biomedical Engineering
subject: FOS: Medical engineering
subject: Biomedical Imaging

description: A new technique to analyze the average dielectric properties of complex structures has been developed. This technique uses microwave transmission measurements to estimate the complex permittivity of the object-under-test over a range of frequencies. First, time-gating is used to reduce multipath. Second, the antenna response is deconvolved from the measured data. Finally, with the object-under-test's response isolated, the average properties are estimated. To test and validate this work, dielectric materials with properties representing biological tissues and robust mechanical properties were developed. Reconfigurable tissue phantoms were created from combinations of these materials. In addition to testing the average property algorithms, these phantoms are well suited to testing a variety of microwave imaging methods. Complex breast phantoms were used to test the average dielectric property estimation technique, and accurate results were found. This technique was then applied to measurements of human breast tissue, and reasonable properties were estimated.
Assessment of metadata and qualitative characteristics for the Ukrainian academic events: a survey among organizers and scholars
Creators: name: Auhunas, Sabina
Publisher: name: Zenodo
Year: 2023
Subjects: academic events
conference management
metadata
evaluation system
conference culture
FAIR principles
open infrastructure

description: This study focuses on evaluating the metadata and qualitative characteristics of Ukrainian academic events involving both organizers and scholars. Despite the complex system of registration of academic events in Ukraine supported by state institutions, problems with metadata management persist, which affects the easy organization of events and participation.
The main aim of the study was to assess the academic community's perspective on the current state of academic event metadata and their level of satisfaction. An extensive survey consisting of 32 questions collected responses from 543 organizers and 727 academics to better understand their preferences and experiences.
The results indicate significant levels of dissatisfaction with the current state of metadata, with a significant percentage of both groups believing that it is "very difficult" to collect and manage. This suggests the importance attached to improving metadata quality for effective organization and participation in scholarly activities.
The results clearly indicate the urgent need to improve metadata practices in the Ukrainian academic environment, with a particular focus on standardization, quality, and accessibility to support the entire academic ecosystem.
TYC 8380-1953-1: Discovery of an RS CVn binary through the XMM-Newton slew survey
Creators: name: Lopez-Santiago, J.
name: Stelzer, B.
name: Saxton, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper we report the discovery of the chromospherically active (RS CVn type) binary TYC 8380-1953-1 through the XMM-Newton slew survey and present results of our optical and X-ray follow-up. With a flux limit of $6 \times 10^{-13}$ erg cm$^{-2}$ s$^{-1}$ in the soft band ($0.2 - 2$ keV), the XMM-Newton slew has a similar sensitivity to the ROSAT All Sky Survey allowing interesting sources to be identified by their long-term variability. Two different types of stellar sources are detected in shallow X-ray surveys: young stars (both pre-main and main sequence stars) and chromospherically active binaries (BY Dra and RS CVn type systems). The discovery of stars in such surveys and the study of their nature through optical follow-ups is valuable to determine their spatial distribution and scale height in the Galaxy. Our analysis shows that TYC 8380-1953-1 is a double-lined spectroscopic binary with both components having similar spectral type (likely K0/2+K3/5) and luminosity. With a typical coronal temperature for an RS CVn system ($kT \sim 1.15$ keV) and an X-ray luminosity in the $0.3-10$ keV energy band higher than $4 \times 10^{31}$ erg\,s$^{-1}$, TYC 8380-1953-1 lies among the most X-ray luminous RS CVn binaries.
description: Accepted for publication in the PASP. 18 pages, 10 figures
Momentary Fitting in a Fluid Environment: A Grounded Theory of Triage Nurse Decision Making
Creators: name: Reay, Gudrun
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Medicine and Surgery
subject: Nursing
subject: FOS: Health sciences
subject: Psychology--Cognitive
subject: Triage
subject: Decision Making
subject: grounded theory
subject: Momenatry Fitting
subject: Emergency Nursing
subject: Nursing

description: Emergency departments (EDs) are fluid environments where conditions are constantly changing. Triage nurses control access to the ED and make decisions about patient acuity, placement, and priority to be examined by a physician. Understanding the processes and strategies that triage Registered Nurses (RNs) use in decision making is therefore vital for patient safety and operation of the ED. The aim of this classical grounded theory study was to understand the processes and strategies that experienced emergency RNs use when making triage decisions and to generate a substantive grounded theory of triage RN decision making. Data collection consisted of twelve interviews with triage RNs and seven observations of the triage environment at three hospital sites in a major urban centre. Initial sampling was purposive; as categories began to emerge theoretical sampling was used in accordance with grounded theory. The data were analyzed using the constant comparative method. Findings reveal that the main concern of triage RNs was to achieve best possible fit between patients and the ED as a whole, given the circumstances for each moment in time. The main concern was conceptualized as the core category Momentary Fitting in a Fluid Environment. Best possible fit was not synonymous with optimal fit. Decision making occurred in a context where each decision changed the conditions for subsequent decisions. Momentary fitting consists of the interrelated categories determining acuity, anticipating needs, managing space, and creating space. At certain critical junctures, RNs decided to create space by pushing boundaries and, at times, temporarily crossing boundaries. Momentary Fitting theory makes explicit the importance for triage RNs to maintain up to date awareness of what is transpiring in the ED. This includes knowledge of incoming critical patients, the condition of patients waiting to be examined, and real time information about available treatment spaces, patients, and staff resources. Moreover, the findings point to the need for structuring triage environments to facilitate mechanisms that allow quick communication between co-workers. The results have implications for design of triage areas, computer programs, graphical user interfaces and education. Future research needs to account for the contextual and ethical nature of triage decisions.
Image Deblurring Using Derivative Compressed Sensing for Optical Imaging Application
Creators: name: Rostami, Mohammad
name: Michailovich, Oleg
name: Wang, Zhou
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Reconstruction of multidimensional signals from the samples of their partial derivatives is known to be a standard problem in inverse theory. Such and similar problems routinely arise in numerous areas of applied sciences, including optical imaging, laser interferometry, computer vision, remote sensing and control. Though being ill-posed in nature, the above problem can be solved in a unique and stable manner, provided proper regularization and relevant boundary conditions. In this paper, however, a more challenging setup is addressed, in which one has to recover an image of interest from its noisy and blurry version, while the only information available about the imaging system at hand is the amplitude of the generalized pupil function (GPF) along with partial observations of the gradient of GPF's phase. In this case, the phase-related information is collected using a simplified version of the Shack-Hartmann interferometer, followed by recovering the entire phase by means of derivative compressed sensing. Subsequently, the estimated phase can be combined with the amplitude of the GPF to produce an estimate of the point spread function (PSF), whose knowledge is essential for subsequent image deconvolution. In summary, the principal contribution of this work is twofold. First, we demonstrate how to simplify the construction of the Shack-Hartmann interferometer so as to make it less expensive and hence more accessible. Second, it is shown by means of numerical experiments that the above simplification and its associated solution scheme produce image reconstructions of the quality comparable to those obtained using dense sampling of the GPF phase.
Optimizing Resource Allocation and Scheduling towards FRMCS and GSM-R networks coexistence in Railway Systems
Creators: name: Aboud, Mohamed Aziz
name: Zangar, Nawel
name: Langar, Rami
name: Berbineau, Marion
name: Madec, Jerome
Publisher: name: arXiv
Year: 2025
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The actual railway communication system used in Europe for high-speed trains (HST) is called the GSM-R system, which is a communication system based on 2G infrastructure. This system is meant to be replaced by a new system based on 5G NR infrastructure called the Future Railway Mobile Communication System (FRMCS) by 2030. For the next years, both systems will probably coexist in the same frequency band since the migration from GSM-R to FRMCS is planned to be done progressively until the GSM-R system is completely shut down, mainly due to safety and budget constraints. In this paper, we study the resource allocation for the FRMCS system sharing the same frequency band as the already deployed GSM-R system. We formulate the resource allocation problem as an integer linear problem (ILP), known to be NP-hard.To solve it in a reasonable time, we propose a scheduling algorithm, called Intelligent Traffic Scheduling Preemptor (ITSP), that allocates resources for the different FRMCS traffic types considered (critical traffic and performance traffic) in the same frequency band with the GSM-R system. Our algorithm is channel quality Indicator (CQI) aware and uses the preemption mechanism in 5G NR standards to optimize the resource allocation for the FRMCS system without impacting the actual GSM-R resource allocation in the context of the white space concept.
Examining the Effectiveness of an Orthographic-Based Intervention for Children with Reading Disabilities
Creators: name: Colp, S. Mitchell
Publisher: name: Education
Year: 2012
Subjects: subject: Education--Early Childhood
subject: Reading Development

description: It has been well-documented that combined phonological awareness and word-identification training provide the most effective way of strengthening reading ability in children with Reading Disabilities (RDs). With that said, these findings are based on the assumption that all children with RDs represent a homogenous population and react similarly to specific intervention approaches. Recognizing the heterogeneity within the RD population, preliminary research has surfaced which challenges the combined approach in favor of techniques which address the relative deficit in either phonological or word-discrimination (orthographic) processes. Continuing in this line of research, a study was conducted to examine the effectiveness of an orthographic-based intervention design to improve reading ability for children with orthographic skill deficits. The study took place at a private, not-for-profit, school designed for children with a variety of Learning Disabilities. Through utilizing a single-case multiple-baseline research design, 12 children with RDs in grades 3 through 6 (3 students per grade) were matched on reading ability and intelligence prior to beginning the intervention. The results of this study will be discussed in relation to the importance of assessing and intervening for specific reading difficulties within RD populations.
Coherent control of artificial molecules using an Aharonov-Bohm magnetic flux
Creators: name: Tu, Matisse Wei-Yuan
name: Zhang, Wei-Min
name: Nori, Franco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Bonding and anti-bonding states of artificial molecules have been realized in experiments by directly coupling two quantum dots. Without a direct coupling between two nearby quantum dots, here we show that a continuous crossover, from symmetric to anti-symmetric molecular state, can be achieved by changing the flux through a double quantum dot Aharonov-Bohm (AB) interferometer. We explicitly present the flux-dependent real-time processes of molecular-state formation. In contrast to the transport current, which has a $2π$ period, the quantum state of the DQD molecule has a $4π$ period in the AB flux.
description: 5 pages, 4 figures
Characterization and Applications of a Water Stationary Phase in Capillary Gas Chromatography
Creators: name: Gallant, Jonathan
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Chemistry--Analytical
subject: Chromatography

description: New stationary phases in gas chromatography (GC) are constantly being investigated. In particular, new polar stationary phases are of interest due the limited number of different ones available versus the abundance of different non-polar phases available. Water is a very polar compound which also possesses other benefits such as its environmentally compatibility, abundance and low retail cost. Water has previously been investigated as a stationary phase in packed column GC. This resulted in an inefficient stationary phase that largely evaporated during operation. This thesis details an investigation of how to form and maintain a water stationary phase in a capillary column GC setting without any significant evaporation. This novel capillary stationary phase yielded separations with almost two full orders of magnitude greater efficiency than the packed column GC water phase. Furthermore, it also possessed an analyte selectivity trend which is totally unique in capillary column GC and the interesting ability to significantly alter/reverse analytes selectivity with oven temperature. The major operating parameters are presented and discussed, and the system is applied to the analysis of several samples to better characterize its performance.
On asymptotically optimal reinforcement learning
Creators: name: Pirutinsky, Daniel
Publisher: name: No Publisher Supplied
Year: 2020

description: We consider the problem of minimizing the long term average expected regret of an agent in an online reinforcement learning environment. In particular, we model this as a Markov Decision Process (MDP) where the underlying transition laws are unknown. There have been many recent successful applications in this area as well as many recent advances in theoretical techniques. However, there still is a significant gap between rigorous theoretical techniques and those that are in actual use. This work represents a step towards shrinking that gap.In the first part we develop a set of properties sufficient to guarantee that any policy satis- fying them will achieve asymptotically minimal regret (up to constant factor of the logarithmic term). The goal in this is to, rather than simply add one more learning policy to the mix, build a flexible framework that may be adapted to a variety of estimative and adaptive policies that are already in use and grant confidence in the performance. To that aim, this work lays the groundwork for what we believe is a useful technique for proving asymptotically minimal rate of regret growth. The conditions are presented here along with hints for how a verifier may prove that their particular algorithm satisfies these conditions. The ideas in this work build strongly on those of [1].In the second part of this work, we derive an efficient method for computing the indices as- sociated with an asymptotically optimal upper confidence bound algorithm (MDP-UCB) of [1] that only requires solving a system of two non-linear equations with two unknowns, irrespective of the cardinality of the state space of the MDP. In addition, we develop the MDP-Deterministic Minimum Empirical Divergence (MDP-DMED) algorithm extending the ideas of [2] for the Multi-Armed Bandit (MAB-DMED) and we derive a similar acceleration for computing these indices that involves solving a single equation of one variable. We provide experimental results demonstrating the computational time savings and regret performance of these algorithms. In these comparison we also consider the Optimistic Linear Programming (OLP) algorithm [3] and a method based on Posterior (Thompson) sampling (MDP-PS).
An independent distance estimate to CW Leo
Creators: name: Groenewegen, M. A. T.
name: Barlow, M. J.
name: Blommaert, J. A. D. L.
name: Cernicharo, J.
name: Decin, L.
name: Gomez, H. L.
name: Hargrave, P. C.
name: Kerschbaum, F.
name: Ladjal, D.
name: Lim, T. L.
name: Matsuura, M.
name: Olofsson, G.
name: Sibthorpe, B.
name: Swinyard, B. M.
name: Ueta, T.
name: Yates, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: CW Leo has been observed six times between October 2009 and June 2012 with the SPIRE instrument on board the Herschel satellite. Variability has been detected in the flux emitted by the central star with a period of 639 \pm 4 days, in good agreement with determinations in the literature. Variability is also detected in the bow shock around CW Leo that had previously been detected in the ultraviolet and Herschel PACS/SPIRE data. Although difficult to prove directly, our working hypothesis is that this variability is directly related to that of the central star. In this case, fitting a sine curve with the period fixed to 639 days results in a time-lag in the variability between bow shock and the central star of 402 \pm 37 days. The orientation of the bow shock relative to the plane of the sky is unknown (but see below). For an inclination angle of zero degrees, the observed time-lag translates into a distance to CW Leo of 130 \pm 13 pc, and for non-zero inclination angles the distance is smaller. Fitting the shape of the bow shock with an analytical model (Wilkin 1996), the effect of the inclination angle on the distance may be estimated. Making the additional assumption that the relative peculiar velocity between the interstellar medium (ISM) and CW Leo is determined entirely by the star space velocity with respect to the local standard of rest (i.e. a stationary ISM), the inclination angle is found to be (-33.3 \pm 0.8) degrees based on the observed proper motion and radial velocity. Using the Wilkin model, our current best estimate of the distance to CW Leo is 123 \pm 14 pc. For a distance of 123 pc, we derive a mean luminosity of 7790 \pm 150 Lsol (internal error).
description: Accepted A&A Letters
Making Sense of the Multiplicity and Dynamics of Navigational Codes in the Brain.
Creators: name: Maisson, David J-N
name: Wikenheiser, Andrew
name: Noel, Jean-Paul G
name: Keinath, Alexandra T
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: Uncategorized

description: Since the discovery of conspicuously spatially tuned neurons in the hippocampal formation over 50 years ago, characterizing which, where, and how neurons encode navigationally relevant variables has been a major thrust of navigational neuroscience. While much of this effort has centered on the hippocampal formation and functionally-adjacent structures, recent work suggests that spatial codes, in some form or another, can be found throughout the brain, even in areas traditionally associated with sensation, movement, and executive function. In this review, we highlight these unexpected results, draw insights from comparison of these codes across contexts, regions, and species, and finally suggest an avenue for future work to make sense of these diverse and dynamic navigational codes.
Magnetic Fields in Population III Star Formation
Creators: name: Turk, Matthew J.
name: Oishi, Jeffrey S.
name: Abel, Tom
name: Bryan, Greg
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the buildup of magnetic fields during the formation of Population III star-forming regions, by conducting cosmological simulations from realistic initial conditions and varying the Jeans resolution. To investigate this in detail, we start simulations from identical initial conditions, mandating 16, 32 and 64 zones per Jeans length, and studied the variation in their magnetic field amplification. We find that, while compression results in some amplification, turbulent velocity fluctuations driven by the collapse can further amplify an initially weak seed field via dynamo action, provided there is sufficient numerical resolution to capture vortical motions (we find this requirement to be 64 zones per Jeans length, slightly larger than, but consistent with previous work run with more idealized collapse scenarios). We explore saturation of amplification of the magnetic field, which could potentially become dynamically important in subsequent, fully-resolved calculations. We have also identified a relatively surprising phenomena that is purely hydrodynamic: the higher-resolved simulations possess substantially different characteristics, including higher infall-velocity, increased temperatures inside 1000 AU, and decreased molecular hydrogen content in the innermost region. Furthermore, we find that disk formation is suppressed in higher-resolution calculations, at least at the times that we can follow the calculation. We discuss the effect this may have on the buildup of disks over the accretion history of the first clump to form as well as the potential for gravitational instabilities to develop and induce fragmentation.
description: 11 pages, 8 figures. Accepted for publication in ApJ
More about "short" spinning quantum strings
Creators: name: Beccaria, Matteo
name: Tseytlin, Arkady A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We continue investigation of the spectrum of semiclassical quantum strings in AdS5 x S5 on the examples of folded (S,J) string (with spin S in AdS5 and orbital momentum J in S5) dual to an sl(2) sector state in gauge theory and its (J',J) counterpart with spin J' in S5 dual to an su(2) sector state. We study the limits of small spins and large J at weak and strong coupling, pointing out that terms linear in spins provide a generalization of "protected" coefficients in the energy that are given by finite polynomials in 't Hooft coupling λ (or square of string tension) for any value of λ. We propose an expression for the coefficient of the term linear in spin J' in the (J',J) string energy which should be the su(2) sector counterpart of the "slope function" in the sl(2) sector suggested by Basso in arXiv:1109.3154.
description: 27 pages, 3 pdf figures. Misprints corrected, few comments added
Real world quantum cryptography
Creators: name: Lucio Martínez, Itzel
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Optics
subject: Quantum cryptography

description: Quantum cryptography uses the quantum properties of individual photons to provide two or more users with means to communicate securely and efficiently. Specifically, quantum key distribution (QKD) focuses on the secure communication between two distant parties and guarantees the security of a transmitted message between them. Although QKD is the most mature application of quantum cryptography, applications of quantum mechanics in communication systems are not limited to QKD and other cryptographic protocols can be implemented as well. This thesis focuses on the implementation of quantum cryptographic systems over deployed fiber. A first QKD system was built and used to demonstrate the BB84 protocol over deployed fiber between the University of Calgary and SAIT. The system implemented a novel tool called quantum frames that allow for the quantum signals to be routed, for clock synchronization, and for channel stabilization in a network scenario. The same system was used to examine the scalability of the secret key generation rate in different steps of the process in order to detect potential bottlenecks for key generation rate of high speed systems. A second QKD system was developed to demonstrate the measurement-device independent QKD protocol. The system worked over deployed fiber between the University of Calgary, SAIT, and Foothills Hospital in the City of Calgary. The advantage of the measurement-device independent QKD protocol over previous QKD protocols is that it eliminates the possibility of side-channel attacks that target single photon detectors used in QKD systems. This demonstration also involved the first demonstration of a Bell state measurement over deployed fiber. Bell state measurements were further studied by using novel single photon detectors, which allowed demonstrating a highly efficient Bell measurement. Finally, a cryptographic protocol known as private queries was demonstrated between the University of Calgary and SAIT. Quantum private queries were demonstrated for the first time over deployed fiber by developing and implementing an error correction scheme to make the protocol noise and loss tolerant.
Automated identification of cutting force coefficients and tool dynamics on CNC machines
Creators: name: Dunwoody, Keith
Publisher: name: University of British Columbia
Year: 2010

description: The complexity and variation of parts are continuously increasing due to technologically oriented consumers. The objective of present manufacturing industry is to increase the quality while decreasing the machining costs. This thesis presents a smart machining strategy which allows the automated prediction of chatter-free cutting conditions using sensors integrated to Computer Numerical Controlled (CNC) machine tools. The prediction of vibration free spindle speeds and depth of cuts require to have material's cutting force coefficient and frequency response function (FRF) of the machine at its tool tip. The cutting force coefficients are estimated from the cutting force measurements collected through dynamometers in laboratory environment. The thesis presents an alternative identification of tangential cutting force coefficient from average spindle power signals which are readily available on machine tools. When tangential, radial and axial cutting force coefficients are needed, the forces need to be collected by piezoelectric sensors embedded to mechanical structures. The structural dynamics of sensor housings distort the force measurements at high spindle speeds. A Kalman filter is designed to compensate the structural modes of the sensor assembly when the spindle speed and its harmonics resonate one of the modes the measuring system. The FRF of the system is measured by a computer controlled impact modal test unit which is integrated to CNC. The impact head is instrumented with a piezo force sensor, and the vibrations are measured with a capacitive displacement sensor. The spring loaded impact head is released by a DC solenoid controlled by the computer. The impact force and resulting tool vibrations are recorded in real time, and the FRF is estimated automatically. The measured FRF and cutting force coefficient estimated from the spindle power are later used to predict the chatter free depth of cuts and spindle speeds. The machine integrated, smart machining system allows the operator to automatically select the chatter-free cutting conditions, leading to improved quality and productivity.