cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The ELM Survey. III. A Successful Targeted Survey for Extremely Low Mass White Dwarfs
Creators: name: Brown, Warren R.
name: Kilic, Mukremin
name: Prieto, Carlos Allende
name: Kenyon, Scott J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Extremely low mass (ELM) white dwarfs (WDs) with masses <0.25 Msun are rare objects that result from compact binary evolution. Here, we present a targeted spectroscopic survey of ELM WD candidates selected by color. The survey is 71% complete and has uncovered 18 new ELM WDs. Of the 7 ELM WDs with follow-up observations, 6 are short-period binaries and 4 have merger times less than 5 Gyr. The most intriguing object, J1741+6526, likely has either a pulsar companion or a massive WD companion making the system a possible supernova Type Ia or .Ia progenitor. The overall ELM Survey has now identified 19 double degenerate binaries with <10 Gyr merger times. The significant absence of short orbital period ELM WDs at cool temperatures suggests that common envelope evolution creates ELM WDs directly in short period systems. At least one-third of the merging systems are halo objects, thus ELM WD binaries continue to form and merge in both the disk and the halo.
description: 10 pages, accepted to ApJ
The Descriptive Epidemiology of Influenza Vaccination and Adverse Events of Influenza Vaccination in Alberta for the 2010-2011 Vaccination Season
Creators: name: Lambo, Jonathan
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Epidemiology
subject: Public Health
subject: influenza, vaccination coverage, adverse events

description: Objective: The objective of this study was to estimate influenza vaccination coverage and describe the occurrence of adverse events related to influenza vaccination in Alberta by attributes of age, sex, geographical indicators (urban or rural), immigrants versus non-immigrants, and provider type for the 2010-2011 vaccination season. Methods: The study used aggregate data from the Alberta’s publicly funded immunization system. Denominators for influenza vaccination coverage were obtained from the health care insurance registry. Descriptive analysis included proportions to describe patterns in rates and events by attributes. Results: Variation in influenza vaccination coverage and adverse events was observed by age, sex, place of residence and in relation to being immigrant and non-immigrant. Among young children and immigrants, there were missing values of adverse events. Conclusions Influenza vaccination coverage rates for the overall population, for all age groups, and for rural and immigrant population are low. Reporting of adverse events is incomplete.
The Minkowski ?(x) function and Salem's problem
Creators: name: Alkauskas, Giedrius
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 11A55, 26A30, 42A16

description: R. Salem (Trans. Amer. Math. Soc. 53 (3) (1943) 427-439) asked whether the Fourier-Stieltjes transform of the Minkowski question mark function ?(x) vanishes at infinity. In this note we present several possible approaches towards the solution. For example, we show that this transform satisfies integral and discrete functional equations. Thus, we expect the affirmative answer to Salem's problem. In the end of this note we show that recent attempt to settle this question (S. Yakubovich, C. R. Acad. Sci. Paris, Ser. I 349 (11-12) (2011) 633-636) is fallacious.
description: 4 pages. C. R. Acad. Sci. Paris, Ser. I. (2012)
Statistically Enhanced Well-to-Tank Greenhouse Gas Model of In Situ Oil Sands: An Evaluation of Variability
Creators: name: Orellana Abreu, Andrea
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Engineering--Chemical
subject: Engineering--Environmental
subject: Engineering--Petroleum
subject: Life Cycle Assessment
subject: oil sands
subject: Greenhouse gas emissions
subject: Monte Carlo
subject: Variability

description: The Canadian oil industry is being scrutinized due to the carbon intensity of oil sands products. Significant variation in greenhouse gas (GHG) emissions of oil sands production has been documented over time due to changing operating parameters. This thesis develops a tool that allows for a detailed, statistically-enhanced variability analysis of the energy use and GHG emissions associated with the production, transportation and processing of in situ oil sands bitumen. Additional modelling capability is added to the previously developed GHG emissions of current Oil Sands Technologies (GHOST) model. Public data-bases are collected to inform Monte Carlo simulations that allow for a better evaluation of variability in monthly GHG emissions across and throughout in situ operating projects. The outcome of this research better assess the nature and degree of variability in GHG emissions of in situ oil sands on a project specific and industry wide basis.
The influence of chiral spherical particles on the radiation of optically active molecules
Creators: name: Guzatov, Dmitry
name: Klimov, Vasily
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the framework of the perturbation theory of the nonrelativistic quantum electrodynamics, a theory of spontaneous emission of a chiral molecule located near a chiral (bi-isotropic) spherical particle is developed. It is shown that the structure of photons in the presence of chiral spherical particles differs significantly from the structure of TE or TM photons. Exact analytical expressions for the spontaneous emission radiative decay rate of a chiral molecule with arbitrary electric and magnetic dipole moments of transition located near a chiral spherical particle with arbitrary parameters are obtained and analyzed in details. Simple asymptotes for the case of a nanoparticle are obtained. Substantial influence of even small chirality on a dielectric or "left-handed" sphere is found. It is shown that by using chiral spherical particles it is possible to control effectively the radiation of enantiomers of optically active molecules.
description: 29 pages, 6 figures
The Influence of Model Components and Misspecification Type on the Performance of the Comparative Fit Index (CFI) and the Root Mean Square Error of Approximation (RMSEA) in Structural Equation Modeling
Creators: name: Mahler, Claudia
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Statistics
subject: structural equation modeling

description: This thesis examined the performance of two popular fit indices used in structural equation modeling: the comparative fit index (CFI) and the root mean square error of approximation (RMSEA). Of interest were the indices’ sensitivities to different sources of misspecification as well as sensitivities to model components that may affect index behavior over and above misspecification. Index performances were evaluated in confirmatory factor analysis models involving one of three sources of misspecification: omitted error covariances, omitted cross-loadings, or an incorrectly modeled latent structure. In addition, model components—including model complexity, loading size, factor correlation size, and model balance—were manipulated to determine their effects on index behavior. It was revealed that CFI is more sensitive to latent misspecifications, while RMSEA is more sensitive to misspecifications due to omitted error covariances. Both indices are affected to some extent by model components, particularly model complexity and loading size.
Access to power : hegemonic party rule in Singapore and Taiwan
Creators: name: Tan, Netina Clara
Publisher: name: University of British Columbia
Year: 2010

description: My dissertation investigates the sources of hegemonic party resilience. I ask why do some hegemonic party regimes persist, while others concede to multipartism? Building on party politics and electoral authoritarianism literature, I develop a mid-range theory based on the concepts of strategic coordination and institutionalization to explain why elites unite and oppositions fail to pose a credible threat. To demonstrate the utility of my explanation, I compare two similar hegemonic parties of different outcomes: the People’s Action Party (PAP) in Singapore and the Kuomintang Party (KMT) in Taiwan. I posit three factors to account for hegemonic party resilience. First, I contend that a hegemonic party that is adept in strategic coordination – by providing public goods and withdrawing political, civil liberties and media freedom – is more likely to win mass support and deter opposition coordination. Both the PAP and early KMT were high performing, strategic regimes that enjoyed growth and forestalled democratization. While the PAP remained the ruling party in Singapore, the KMT controlled the pace of liberalization during its long decade of transition, losing power after a party split. Second, I argue that the PAP is better than the KMT in keeping the ruling elites united because of its institutionalized leadership succession system. I develop a model to explain how a centralized, oligarchic and exclusionary leadership selection method fosters elite unity. My findings based on elite interviews, party publications and survey data support the counter-intuitive theory that the more intra-party democracy, the less party cohesion. Finally, in hegemonic party regimes, survival means increasing the certainty of winning. Through electoral engineering, the incumbent is able to institutionalize an uneven playing field that systematically disadvantages the opposition. By analyzing the mechanical and psychological effects of electoral reforms, I offer new empirical evidence to show how the PAP “manufactured” its legislative supermajority to rescue its declining popular votes. The contrasting study of the KMT highlights how a former hegemonic party transforms and adapts as a dominant party to survive the uncertainty of elections.
Detection, Prevention and Control of Lameness and Foot Lesions in Canadian Dairy Herds
Creators: name: Solano Quesada, Laura
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Veterinary Science
subject: Epidemiology
subject: dairy cattle
subject: lameness
subject: claw health
subject: footbath
subject: digital dermatitis
subject: animal welfare
subject: cow comfort

description: Lameness is a multifactorial condition and a clinical sign of painful disorders related to the locomotor system. Furthermore, it is a severe welfare issue and production-limiting disorder, ranking third as the most significant health problem in dairy cattle. Approximately 90% of lameness is caused by foot lesions. Understanding the multifactorial nature and interconnected risk factors of lameness and foot lesions is essential for disease prevention and control. This thesis comprises two parts that explore the epidemiology of lameness and foot lesions across Canada. In Part 1, research focused on estimating prevalence and identifying risk factors for lameness and foot lesions, in addition to evaluating automated measures of lying behavior as a diagnostic tool for lameness. Lameness affected 21% of cows; prevalence was higher on farms with poor comfort of surfaces for standing and lying. Lying behavior was not a sensitive diagnostic tool for lame cows, as it was subject to wide variability due to intrinsic cow factors. The most prevalent foot lesion was digital dermatitis (DD), affecting 15% of cows and 94% of herds in Alberta. Digital dermatitis is an infectious foot lesion that causes painful skin erosions, and has large economic and welfare implications. The use of footbaths is the most common herd-level approach to control spread of DD. Suboptimal footbath management was an important reason for the high DD prevalence in Alberta. Therefore, in Part 2, an intervention study was conducted to evaluate effectiveness of a standardized footbath protocol in decreasing DD prevalence. The protocol was based on current scientific literature, including footbath design and management. Additionally, a method for simple and reliable detection of DD lesions was validated and proven highly sensitive (92%) and specific (88%). The footbath intervention was effective in achieving and maintaining a lower prevalence of cows with active DD lesions and a higher prevalence of cows without DD. In addition, cows with poor leg cleanliness more often had DD. Ultimately, adopting management practices intended to improve cows’ comfort and hygiene of surfaces for lying and standing, along with improvements in footbath design and protocol, could decrease prevalence of foot lesions and lameness.
Surface states on a topologically non-trivial semimetal: The case of Sb(110)
Creators: name: Bianchi, Marco
name: Guan, Dandan
name: Strozecka, Anna
name: Voetmann, Celia H.
name: Bao, Shining
name: Pascual, Jose Ignacio
name: Eiguren, Asier
name: Hofmann, Philip
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structure of Sb(110) is studied by angle-resolved photoemission spectroscopy and first-principle calculations, revealing several electronic surface states in the projected bulk band gaps around the Fermi energy. The dispersion of the states can be interpreted in terms of a strong spin-orbit splitting. The bulk band structure of Sb has the characteristics of a strong topological insulator with a Z2 invariant nu0=1. This puts constraints on the existence of metallic surface states and the expected topology of the surface Fermi contour. However, bulk Sb is a semimetal, not an insulator and these constraints are therefore partly relaxed. This relation of bulk topology and expected surface state dispersion for semimetals is discussed.
description: 7 pages, 4 figures
A novel diagnostic test to screen SARS-CoV-2 variants containing E484K and N501Y mutations
Creators: name: Zhao, Yanan
name: Lee, Annie
name: Composto, Kaelea
name: Cunningham, Marcus H.
name: Mediavilla, Jose R.
name: Fennessey, Samantha
name: Corvelo, André
name: Chow, Kar Fai
name: Zody, Michael
name: Chen, Liang
name: Kreiswirth, Barry N.
name: Perlin, David S.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Spike protein mutations E484K and N501Y carried by SARS-CoV-2 variants have been associated with concerning changes of the virus, including resistance to neutralizing antibodies and increased transmissibility. While the concerning variants are fast spreading in various geographical areas, identification and monitoring of these variants are lagging far behind, due in large part to the slow speed and insufficient capacity of viral sequencing. In response to the unmet need for a fast and efficient screening tool, we developed a single-tube duplex molecular assay for rapid and simultaneous identification of E484K and N501Y mutations from nasopharyngeal swab (NS) samples within 2.5 h from sample preparation to report. Using this tool, we screened a total of 1135 clinical NS samples collected from COVID patients at 8 hospitals within the Hackensack Meridian Health network in New Jersey between late December 2020 and March 2021. Our data revealed dramatic increases in the frequencies of both E484K and N501Y over time, underscoring the need for continuous epidemiological monitoring.
Entanglement from longitudinal and scalar photons
Creators: name: Franson, J. D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The covariant quantization of the electromagnetic field in the Lorentz gauge gives rise to longitudinal and scalar photons in addition to the usual transverse photons. It is shown here that the exchange of longitudinal and scalar photons can produce entanglement between two distant atoms or harmonic oscillators. The form of the entangled states produced in this way is very different from that obtained in the Coulomb gauge, where the longitudinal and scalar photons do not exist. A generalized gauge transformation is used to show that all physically observable effects are the same in the two gauges, despite the differences in the form of the entangled states. An approach of this kind may be useful for a covariant description of the dynamics of quantum information processing.
description: 12 pages, 1 figure
Teleologism Full Stop: A General Theory of Ability, Agency, Obligation, and Justification
Creators: name: Hebert, Ryan
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Ability
subject: Agency
subject: Deontic modals
subject: Epistemic justification
subject: Epistemic modals
subject: Obligation
subject: Justification
subject: Permission

description: Deontic modals are the topic of my dissertation. All deontic modals, yes, but justification in particular, and epistemic justification even more specifically. Deontic modals operate upon performances—they appraise performances. Positively appraised, a performance is appropriate, decent, justifiable, right, permissible, or proper; negatively appraised, inappropriate, indecent, unjustifiable, wrong, impermissible, or improper. Belief and knowledge and performances in exactly the same sense that action and intention are performances: all are products of powers that are in some sense responsive to reasons. The principal difference is the direction of fit between mind and world. Knowledge and belief the product of cognitive powers aimed at adapting mind to world, action and intention the product of conative powers aimed at adapting world to mind. All are normatively evaluable and the characteristic normative appraisal of each is deontic. Epistemology, ethics, and rational choice all investigate the nature of deontic modals, differing only insofar as the central aims are epistemic, moral, or prudential in nature. In this sense, the general theory of deontic modals is the parent to epistemology, ethics, and rational choice. My project is to develop and defend a schematic theory of justification. I achieve this end by developing and defending a general theory of deontic modalities. Riffing on two pithy turns of phrase, the deontic theory may be tersely sloganized: value first and one must do the best one can. It is a teleological theory that defines all deontic concepts from the theoretically foundational notions of ability and value. Roughly, a belief is epistemically justifiable if, and only if, it is part of an epistemically optimific belief set the agent is able to have. Roughly, an act is morally justifiably if, and only if, it is part of a morally optimific action set the agent is able to perform. My pet interest is in the former. The resultant framework is enormously fruitful, especially in epistemology.
Efficiency Improvement of Multi-band Wireless Transceivers using Advanced Digital Signal Processing Algorithms
Creators: name: Kwan, Andrew
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering--Electronics and Electrical
subject: Digital Predistortion
subject: multi-band transceivers
subject: envelope tracking
subject: subsampling
subject: efficiency improvement

description: Innovations in wireless communications has led to an exponential increase in the amount of users and data traffic. While highly spectral efficient modulation schemes and multi-band/wideband signal transmission enables high data traffic throughput, multiple challenges exist in the design and implementation of these transceivers, especially since these transceivers draw a high amount of power. Designers of wireless transceivers require more effort to increase their overall efficiency compared to the technology that exists for narrowband wireless transceivers. This dissertation introduces several techniques for optimizing wireless transceivers using advanced architectures and digital signal processing algorithms. The research focus is specifically for multi-band and wideband signal transmission, where design complexity increases over traditional transceiver architectures. A subsampling receiver architecture is used as an alternative for wireless receivers. This type of receiver enables direct sampling and digitization of RF signals without a downconversion stage, which reduces the complexity and increases the flexibility of the receiver. The subsampling architecture is utilized in a variety of applications, including as a feedback loop replacement in a dual-band digital predistortion (DPD) architecture. The results show that using subsampling can concurrently capture both signal bands at the same time while providing comparable linearization performance with conventional DPD architectures. DPD is a suitable technology for linearity enhancement and efficiency improvement of wireless transmitters. However, extension to wideband and multi-band topologies requires high digital sampling rates. A technique is introduced to reduce the sampling rate requirements in the feedback loop of the transmitter in a wideband and multi-band scenarios, where a reduction of up to twice the sampling rates can be achieved while able to produce accurate linearization performance. Envelope tracking increases the efficiency of the transmitter power amplifier (PA) at large output back-off power, performed by adjusting the voltage supplied to the PA based on the input signal characteristics. Using the digital signal processing techniques outlined in the thesis, the results obtained show that ET and DPD together can provide up to 9% efficiency improvement over just DPD alone, and are suitable for future generations of wireless transmitters.
Modeling and Dynamic Control of Autonomous Ground Mobile Manipulators
Creators: name: Mustafa, Mahmoud
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering--Industrial
subject: Engineering--Mechanical
subject: Robotics
subject: Mobile Manipulator
subject: Control
subject: Neural Network

description: A Mobile Manipulators (MMs) in particular is an articulated robotic arm mounted on a (space, ground, aerial, surface or underwater) mobile platform. The mobile platform increases the size of the manipulator’s workspace and as a result the increased degree of mobility enables better positioning of the manipulator in different configurations for efficient task execution. However, it is a challenge to effectively control such systems outside the lab and engineered environments such as those encountered in rough outdoor environments and urban search and rescue applications where numerous uncertainties exist. In these environments numerous model approximations have been used which cannot be considered when working in real world outdoor conditions. The main focus of this work is to develop needed mechanisms to enable the deployment of MMs in unstructured terrains. For this a kinematic and dynamic model for a generalized mobile manipulator without using approximations is developed. In addition, such improved model is used for the control and robustness of mobile manipulator controllers in the existence of dynamic uncertainties which has not been extensively considered in prior work. Two new control algorithms are developed and shown to solve the problem at hand with much better accuracy when compared to prior proposed solutions. As a result of the proposed developed methodologies the proposed control system architecture is shown to be applicable for the control of MMs performing a cooperative task with other robots or humans. The control mechanism enables the MMs to execute complex tasks when it is subject to dynamic uncertainties resulted from cooperation with humans or other autonomous robots when working in unknown, dynamic, heterogeneous outdoor rough terrains/environments. The approach is shown to be effective with the use of two different control solutions: i) robust sliding mode backstepping kinematic into dynamics, and ii) stable robust adaptive Sliding mode backstepping CMAC Neural Network control where both control systems use a Lyapunov function stability. Simulation tests using a detailed SIMMECHANICS /SIMULINK model of the employed MMs are presented to illustrate and demonstrate the performance of the developed control mechanisms.
Optimal partial-arcs in VMAT treatment planning
Creators: name: Wala, Jeremiah
name: Salari, Ehsan
name: Chen, Wei
name: Craft, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Purpose: To improve the delivery efficiency of VMAT by extending the recently published VMAT treatment planning algorithm vmerge to automatically generate optimal partial-arc plans. Methods and materials: A high-quality initial plan is created by solving a convex multicriteria optimization problem using 180 equi-spaced beams. This initial plan is used to form a set of dose constraints, and a set of partial-arc plans is created by searching the space of all possible partial-arc plans that satisfy these constraints. For each partial-arc, an iterative fluence map merging and sequencing algorithm (vmerge) is used to improve the delivery efficiency. Merging continues as long as the dose quality is maintained above a user-defined threshold. The final plan is selected as the partial arc with the lowest treatment time. The complete algorithm is called pmerge. Results: Partial-arc plans are created using pmerge for a lung, liver and prostate case, with final treatment times of 127, 245 and 147 seconds. Treatment times using full arcs with vmerge are 211, 357 and 178 seconds. Dose quality is maintained across the initial, vmerge, and pmerge plans to within 5% of the mean doses to the critical organs-at-risk and with target coverage above 98%. Additionally, we find that the angular distribution of fluence in the initial plans is predictive of the start and end angles of the optimal partial-arc. Conclusions: The pmerge algorithm is an extension to vmerge that automatically finds the partial-arc plan that minimizes the treatment time. VMAT delivery efficiency can be improved by employing partial-arcs without compromising dose quality. Partial arcs are most applicable to cases with non-centralized targets, where the time savings is greatest.
Additional file 1: of The development and evaluation of a sub-health self-rating scale for university students in China
Creators: name: Bi, Jian-lu
name: Chen, Jing
name: Sun, Xiao-min
name: Nie, Xiao-li
name: Liu, Yan-yan
name: Luo, Ren
name: Zhao, Xiao-shan
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: This is an English language version of the questionnaire for our study. Table S1. The reference to questionnaire. (DOCX 18 kb)
Our Glue is Our Ability to Talk Things Through: Heterosexual Couples' Successful Conversations about Sex
Creators: name: Kovitz, Bevan
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Psychology
subject: FOS: Psychology
subject: sexuality
subject: couples
subject: Narrative
subject: Counselling
subject: qualitative

description: In this research, I explored how heterosexual couples had successful conversations about sex, and the meanings these conversations had for their relationships. Six couples participated in semi-structured interviews in which they shared stories of conversations about sex they identified as being successful. I approached this research from a social constructionist perspective, using a combination of Riessman’s (2008) thematic and dialogic/performative analyses to analyze the stories couples and I co-constructed in our interviews. Through their stories, participating couples emphasized the importance of being open and managing conflict in order to have successful conversations about sex. These conversations were seen as being a significant part of the foundation of their relationship, resulting in feelings of closeness and sexual exploration. I explore the results of this analysis in terms of their possible implications for couples, counsellors, and researchers.
Cloud-Based Service System for Automatic Plant Monitoring and Watering based on Soil Moisture
Creators: name: Ratthaslip Ranokphanuwat
Publisher: name: Faculty of Information Science and Technology, Mahanakorn University of Technology
Year: 2018
Subjects: Internet of Things
Amazon cloud technology
Automatic plant watering
Soil moisture sensor

description: Journal of Information Science and Technology, 8, 2, 65-73
Variability in alkaloid and phenolic content vis-a-vis antigout potential among the natural population of Gloriosa superba (L.) collected from Central India
Creators: name: Misra, Ankita
name: Srivastava, Sharad
name: Shukla, Pushpendra Kumar
name: Kumar, Manish
name: Khalid, Md.
name: Kushwaha, Poonam
name: Agrawal, Pawan Kumar
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Virology

description: The variation in alkaloid metabolites (colchicine and gloriosine) was found significant in the nine germplasms of G. superba (L.), collected from Central India. The maximum content of colchicine and gloriosine was in NBG-15 (Chitrakoot, M.P) and NBG-13 (Bheraghat, M.P). The phenolic acids viz. quercetin and kaempferol was first ever quantified in G. superba tuber. Cluster analysis on chemical variability (colchicine and gloriosine content) results in the identification of three elite germplasm(s). The radical scavenging potential was also found promising in the selected elite germplasm viz. NBG-13, NBG-14 and NBG-15. Further, the protein denaturation potential of elite chemotypes was found at par with standard colchicine. The study will aid in site specific exploration of high metabolite yielding chemotype(s) with validated pharmacological action to meet out the industrial demands. This will also promotes the commercial cultivation of species for socio economical upliftment in the area having similar phyto geographical conditions.
Linearized Metagravity from Conformal Deformations
Creators: name: Shoshany, Barak
Publisher: name: Zenodo
Year: 2015

description: The principle of relative locality is a generalization of the principle of relativity in which even locality – the coincidence of events – is no longer absolute, and each observer has a different notion of spacetime. This is achieved by allowing (energy-)momentum space to be curved independently of spacetime. Phase space is the only truly invariant structure, that is, independent of the observer. This principle has recently been implemented in metastring theory, a new formulation of string theory in which the strings propagate on the entire phase space. In addition to the symplectic form \omega, the metastring phase space possesses a polarization metric \eta, which specifies how phase space is decomposed into spacetime and momentum space, and a generalized metric H, which encodes the independent curvatures of these spaces. Our aim in this essay is to make the first step towards understanding this so-called metageometry, postulated to uniquely define a generalization of Einstein gravity which we refer to as metagravity. This is accomplished by conjuring some “string magic”. If we ask the strings of string theory what kind of background spacetime they are willing to propagate on, their reply, compelled by mathematical consistency alone, is that the spacetime metric must satisfy Einstein's equations of general relativity. Deriving the metagravity equations is thus simply a matter of posing the same question in metastring theory. More precisely, we perturb the background fields and require that the resulting worldsheet theory remains a conformal field theory. Using this method of conformal deformations, we find linearized equations of motion for the perturbations.
description: MSc Thesis
Rapid Characterization and Degradation of Dissolved Organic Matter for Improving the Quality of Boiler Feed Water in Steam Assisted Gravity Drainage Process
Creators: name: Cui, Jun
Publisher: name: Graduate Studies
Year: 2016
Subjects: Chemistry--Analytical

description: Dissolved organic matter (DOM) in boiler feed water (BFW) for steam assisted gravity drainage process (SAGD) leads to numerous operational problems including fouling of downstream equipment surfaces, pipelines, and clogging of injection wells. Regulations governing produced water require 90% of the water to be recycled. Current treatment practices in the industry for recycling of produced water mainly target inorganics, separable oil and bitumen. Effective treatment for removal of DOM is not available as the characteristics of DOM in BFW not been well understood. In this study, I present rapid and efficient methods for degradation of DOMs in BFW after extensively characterizing on them. DOM characterization includes fractionation into hydrophobic acid, hydrophobic base, neutral and hydrophilic fractions. I investigated treatment with UV/H2O2 and UV/TiO2 for the degradation of fractionated hydrophobic acids and actual BFW. Experiments were conducted in LED and Rayonet reactors to identify suitable reactor configuration for treatment process.
Shear-flexion cross-talk in weak-lensing measurements
Creators: name: Viola, Massimo
name: Melchior, Peter
name: Bartelmann, Matthias
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Gravitational flexion, caused by derivatives of the gravitational tidal field, is potentially important for the analysis of the dark-matter distribution in gravitational lenses, such as galaxy clusters or the dark-matter haloes of galaxies. Flexion estimates rely on measurements of galaxy-shape distortions with spin-1 and spin-3 symmetry. We show in this paper that and how such distortions are generally caused not only by the flexion itself, but also by coupling terms of the form (shear $\times$ flexion), which have hitherto been neglected. Similar coupling terms occur between intrinsic galaxy ellipticities and the flexion. We show, by means of numerical tests, that neglecting these terms can introduce biases of up to 85% on the $F$ flexion and 150% on the $G$ flexion for galaxies with an intrinsic ellipticity dispersion of $σ_ε=0.3$. In general, this bias depends on the strength of the lensing fields, the ellipticity dispersion, and the concentration of the lensed galaxies. We derive a new set of equations relating the measured spin-1 and spin-3 distortions to the lensing fields up to first order in the shear, the flexion, the product of shear and flexion, and the morphological properties of the galaxy sample. We show that this new description is accurate with a bias $\leq 7%$ (spin-1 distortion) and $\leq 3%$ (spin-3 distortion) even close to points where the flexion approach breaks down due to merging of multiple images. We propose an explanation why a spin-3 signal could not be measured yet and comment on the difficulties in using a model-fitting approach to measure the flexion signal.
description: 11 pages, MNRAS accepted
title: Speech given by Dr. G. Herzberg at dinner given in his honour by the Government of the Province of Ontario, 17 May, 1972
Creators: name: Herzberg, Gerhard
Publisher: name: Government of the Province of Ontario
Year: 1972
Subjects: subject: Herzberg, Gerhard
subject: Herzberg, Gerhard
subject: science policy
subject: politique scientifique

description: Speech delivered May 17, 1972 (typed version of speech)
description: Discours prononcé le 17 mai 1972 (version dactylographiée du discours)
An Unexpected Discovery in the Rich Open Cluster NGC 6819 Using XMM-Newton
Creators: name: Gosnell, Natalie M.
name: Pooley, David
name: Geller, Aaron M.
name: Kalirai, Jason
name: Mathieu, Robert D.
name: Frinchaboy, Peter
name: Ramirez-Ruiz, Enrico
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first study of the X-ray population of the intermediate-age rich open cluster NGC 6819 using the XMM-Newton Observatory. In the past decade, Chandra X-ray observations have shown a relationship between the X-ray population of globular clusters and their internal dynamics and encounter frequency. We investigate the role dynamics possibly play in the formation of X-ray sources in NGC 6819, and compare our results with known properties of field and globular cluster X-ray populations. We implement a multi wavelength approach to studying the X-ray sources, utilizing X-ray and UV data from XMM observations along with the wealth of photometry and radial-velocity data from the WIYN Open Cluster Study (WOCS) and the CFHT Open Cluster Survey. Within the cluster half-light radius we detect 12 X-ray sources down to a luminosity of 10^30 erg/s for cluster members. The sources include a candidate quiescent low-mass X-ray binary (qLMXB), a candidate cataclysmic variable, and two active binary systems. The presence of a qLMXB in an open cluster is previously unexpected given the known relationships between luminous X-ray sources and encounter frequency in globular clusters, and most likely has a dynamical origin.
description: 14 pages, 11 figures, accepted for publication in the Astrophysical Journal
title: Ein Schatz der Schweizer Hotellerie-geschichte wechselt seinen Standort
title: Ein Schatz der Schweizer Hotellerie-geschichte wechselt seinen Standort
titleType: AlternativeTitle
Creators: name: Borrelli, Graziella
Publisher: name: Hotelarchiv Schweiz
Year: 2011

description: La couv. porte: Ein Archiv auf Wanderschaft, et en plus: Newsletter 1.
Luminescence of GaAs nanowires consisting of wurtzite and zincblende segments
Creators: name: Jahn, Uwe
name: Lähnemann, Jonas
name: Pfüller, Carsten
name: Brandt, Oliver
name: Breuer, Steffen
name: Jenichen, Bernd
name: Ramsteiner, Manfred
name: Geelhaar, Lutz
name: Riechert, Henning
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: GaAs nanowires (NWs) grown by molecular-beam epitaxy may contain segments of both the zincblende (ZB) and wurtzite (WZ) phases. Depending on the growth conditions, we find that optical emission of such NWs occurs either predominantly above or below the band gap energy of ZB GaAs [E(g,ZB)]. This result is consistent with the assumption that the band gap energy of wurtzite GaAs [E(g,WZ)] is larger than E(g,ZB) and that GaAs NWs with alternating ZB and WZ segments along the wire axis establish a type II band alignment, where electrons captured within the ZB segments recombine with holes of the neighboring WZ segments. Thus, the corresponding transition energy depends on the degree of confinement of the electrons, and transition energies exceeding E(g,ZB) are possible for very thin ZB segments. At low temperatures, the incorporation of carbon acceptors plays a major role in determining the spectral profile as these can effectively bind holes in the ZB segments. From cathodoluminescence measurements of single GaAs NWs performed at room temperature, we deduce a lower bound of 55 meV for the difference E(g,WZ)-E(g,ZB).
description: 8 pages, 10 figures
Geometric descriptions of entangled states by auxiliaries varieties
Creators: name: Holweck, Frédéric
name: Luque, Jean-Gabriel
name: Thibon, Jean-Yves
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The aim of the paper is to propose geometric descriptions of multipartite entangled states using algebraic geometry. In the context of this paper, geometric means each stratum of the Hilbert space, corresponding to an entangled state, is an open subset of an algebraic variety built by classical geometric constructions (tangent lines, secant lines) from the set of separable states. In this setting we describe well-known classifications of multipartite entanglement such as $2\times 2\times(n+1)$, for $n\geq 1$, quantum systems and a new example with the $2\times 3\times 3$ quantum system. Our description completes the approach of Miyake and makes stronger connections with recent work of algebraic geometers. Moreover for the quantum systems detailed in this paper we propose an algorithm, based on the classical theory of invariants, to decide to which subvariety of the Hilbert space a given state belongs.
description: 32 pages, 15 Tables, 5 Figures. References and remarks added
Enhanced Electrogastrography Using Transcutaneous Intraluminal Impedance Measurements (TIIM)
Creators: name: Poscente, Michael Dennis
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering--Biomedical
subject: Transcutaneous Intraluminal Impedance Measurements

description: Gastric motility and gastric emptying rates have been implicated in the symptoms of functional dyspepsia and gastroparesis. The current gold standard to assess gastric emptying is scintigraphy, which is limited by standardization and radiation concerns. This highlights the need for a novel method of assessing gastric motility. Transcutaneous Intraluminal Impedance Measurement (TIIM) is a novel method of assessing gastric motility. By measuring the dynamics of a known signal emitted from a battery-powered gastric retentive oscillator within the stomach, gastric motility can be quantified. In an eight-dog sham comparison study, TIIM was compared to force transducers implanted on the stomach. Two assessment metrics demonstrated statistically significant Pearson correlation coefficients between active TIIM pills and the force transducers (p<0.01, p<0.05), but not when TIIM pills were replaced by sham deactivated pills (p>0.1, p>0.1). A novel portable TIIM receiver was also proposed and tested in the lab to facilitate future ambulatory studies.
THE COMPLEX INTERSECTION OF RACE AND IDENTITY: AFRO-LATINX MENTAL WELLNESS IN THE U.S.
Creators: name: Malone, Jennifer
Publisher: name: Zap journals
Year: 2023
Subjects: Afro-Latinx
Racial Identity
Mental Wellness
Self-Perception
Latinx Community

description: This study addresses the critical gap in literature regarding the racial identity experiences and mental wellness of Afro-Latinx individuals in the United States. While intra-cultural recognition can offer some relief from adverse experiences, it doesn't fully counteract the societal dismissal of one's racial identity and its impact on self-perception and overall mental health. The Latinx community is diverse, often identifying based on nationality rather than race in Latin American countries, while the U.S. employs labels that categorize Latinx individuals as "Latinos," "brown people," or "Hispanics." To exacerbate this, Latinos are subjected to additional labels, including Afro-Latinx. This term applies to individuals with African ancestry or a mix of African and mestizo heritages
Local stellar kinematics from RAVE data: II. Radial Metallicity Gradient
Creators: name: Coskunoglu, B.
name: Ak, S.
name: Bilir, S.
name: Karaali, S.
name: Onal, O.
name: Yaz, E.
name: Gilmore, G.
name: Seabroke, G. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate radial metallicity gradients for a sample of dwarf stars from the RAdial Velocity Experiment (RAVE) Data Release 3 (DR3). We select a total of approximately 17000 F-type and G-type dwarfs using selection of colour, log g, and uncertainty on derived space motion, calculate for each star a probabilistic (kinematic) population assignment to thick or thin disc using space motion, and additionally another (dynamical) assignment using stellar vertical orbital eccentricity. We additionally subsample by colour, to provide samples biased to young thin disc and to older thin disc stars. We derive a metallicity gradient as a function of Galactocentric radial distance, i.e. d[M/H]/dR_m=-0.051+/-0.005 dex kpc^-1, for the youngest sample, F-type stars with vertical orbital eccentricities e_V<=0.04. Samples biased to older thin disc stars show systematically shallower abundance gradients.
description: 23 pages, including 7 figures and 4 tables, accepted for publication in MNRAS
Study of Semi-Industrial Polymeric Vapor Permeation Modules
Creators: name: Vargas-Ferrer, Marlon Jose
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Chemistry--Polymer
subject: Energy
subject: Engineering--Chemical
subject: Materials Science
subject: Engineering--Operations Research
subject: Membrane
subject: Vapor
subject: Permeation
subject: Biofuels
subject: Ethanol
subject: Industrial
subject: Polymeric

description: The use of biofuels such as ethanol is an attractive alternative to replace fossil fuels, however, traditional separation processes to remove water from these compounds are energy intensive. Thus, membrane technology is an energy efficient alternative, capable of selectively separating target components while achieving high rates of permeation. Innovative semi-industrial hollow fiber modules were tested in a pilot scale unit at different conditions. From the samples obtained, discrepancies were found between cartridges. Experimental results showed some deviation (up to ±15%) with respect to the existing membrane model. The variables responsible for those differences have been identified and were incorporated into the existing model reducing the error to less than 5 %. The effects of leakage were found to increase with pressure severely affecting the module performance and product recovery. It was found that an efficient membrane module should possess less than 30 STLPM in non-destructive tests to achieve performance requirements.
Relativistic causality and clockless circuits
Creators: name: Matherat, Philippe
name: Jaekel, Marc-Thierry
Publisher: name: arXiv
Year: 2011
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Time plays a crucial role in the performance of computing systems. The accurate modelling of logical devices, and of their physical implementations, requires an appropriate representation of time and of all properties that depend on this notion. The need for a proper model, particularly acute in the design of clockless delay-insensitive (DI) circuits, leads one to reconsider the classical descriptions of time and of the resulting order and causal relations satisfied by logical operations. This questioning meets the criticisms of classical spacetime formulated by Einstein when founding relativity theory and is answered by relativistic conceptions of time and causality. Applying this approach to clockless circuits and considering the trace formalism, we rewrite Udding's rules which characterize communications between DI components. We exhibit their intrinsic relation with relativistic causality. For that purpose, we introduce relativistic generalizations of traces, called R-traces, which provide a pertinent description of communications and compositions of DI components.
description: 25 pages, 5 figures