cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effects of Domestic Freezing Temperature (-20?C) and Blanching on the Functional Properties and Constituents of Three Common Culinary Herbs of Lamiaceae Family
Creators: name: Iheozor-Ejiofor, Pamela
Publisher: name: University of Lincoln
Year: 2023

description: The effects of blanching prior to freezing on the functional constituents (ascorbic acid, selenium, phytic acid and phenolic content) and properties (total antioxidant activity, enzyme inhibition activity and prebiotic functions) of 3 well known Lamiceae herbs (mint/Mentha piperita, thyme/Thymus vulgaris and basil/Ocmium basicilla) were investigated. Comparisons were made between herbs and across different treatments (fresh, un-blanched frozen (-20?C) and blanched frozen). Due to the complexity of antioxidant and phenolic compounds/components of plants, extracts for total phenolics and antioxidant activities were made in methanol and water. Generally, among all assayed herbs, mint showed superiority compared to other herbs in terms of functional constituents and properties. However, results of antioxidant capacity/content (DPPH, ORAC, FRAP and CUPRAC) and TPC varied inconsistently across herbs, treatments and assays. Results also showed that frozen herbs have lower selenium, ascorbic (total, and reduced) and phytic acid content compared to fresh herbs. Furthermore, results of ascorbic acid content showed a significantly lower dehydroascorbic acid (DHA) content in frozen herbs than fresh herbs. Results of enzyme inhibition showed a moderate to very low ?-amylase inhibition ability by all herbs which further reduced on freezing and blanching. Furthermore, compared to other herbs, mint showed the highest ?-glucosidase inhibition which reduced on freezing and blanching. Lineweaver-Burke plot showed that fresh and un-balnched frozen mint displayed un-competetive mode of inhibition while blanched frozen mint showed mixed inhibition. Freezing tended to improve the ?-glucosidase inhibition effects of thyme and basil which was not evident in fresh extracts. None of the herbs showed inhibitory effects against ACE. All herbs showed significant prebiotic effects on probiotic bacteria L. rhamnosus and B.bifidum. However, effects of freezing and blanching varied inconsistently among herbs Results of the functional properties correlated with individual phenolic acid content of herbs. This therefore shows that the product of the hydrolysis of these individual phenolic compounds play significant role in the functional properties of the assayed herbs. The findings from this research have therefore shown that freezing (blanching or without blanching) can positively or negatively affect the assayed functional constituents and properties of assayed lamiceae herbs. However, in some instances, there is no difference between the functional constituents of fresh and frozen (un-blanched and blanched)
Correlators of chiral primaries and 1/8 BPS Wilson loops from perturbation theory
Creators: name: Bonini, Marisa
name: Griguolo, Luca
name: Preti, Michelangelo
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study at perturbative level the correlation functions of a general class of 1/8 BPS Wilson loops and chiral primaries in N = 4 Super Yang-Mills theory. The contours and the location of operator insertions share a sphere S^2 embedded into spacetime and the system preserves at least two supercharges. We perform explicit two-loop computations, for some particular but still rather general configuration, that confirm the elegant results expected from localization procedure. We find notably full consistency with the multi-matrix model averages, obtained from 2D Yang-Mills theory on the sphere, when interacting diagrams do not cancel and contribute non-trivially to the final answer.
description: 30 pages, 13 figures
Effectiveness of physical activity promoting interventions in physical and exercise therapy for persons with non-communicable diseases: A protocol for an overview of reviews
Creators: name: Pfeifer, Klaus
name: Jung, Andres
name: Gorden Sudeck
name: Lina-Marie Hoessel
name: Matting, Leon
name: Siemens, Waldemar
name: Geidl, Wolfgang
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Medical Sciences
subject: Medicine and Health Sciences
subject: Sports Sciences
subject: Rehabilitation and Therapy
subject: physical therapy
subject: exercise therapy
subject: overview of reviews
subject: physical activity

description: The aim of this planned overview of reviews is to synthesize all evidence from systematic reviews on the effectiveness of physical and exercise therapies including interventional elements explicitly aiming at phyiscal activity promotion (PAP) in patients with NCDs into a comprehensive overview.
Letter to the Editor
Creators: name: Hu, Yuao
name: Tian, Ye
name: Lian, Heng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The paper by Alfons, Croux and Gelper (2013), Sparse least trimmed squares regression for analyzing high-dimensional large data sets, considered a combination of least trimmed squares (LTS) and lasso penalty for robust and sparse high-dimensional regression. In a recent paper [She and Owen (2011)], a method for outlier detection based on a sparsity penalty on the mean shift parameter was proposed (designated by "SO" in the following). This work is mentioned in Alfons et al. as being an "entirely different approach." Certainly the problem studied by Alfons et al. is novel and interesting.
description: Published in at http://dx.doi.org/10.1214/13-AOAS640 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Ab-initio coupled-cluster effective interactions for the shell model: Application to neutron-rich oxygen and carbon isotopes
Creators: name: Jansen, G. R.
name: Engel, J.
name: Hagen, G.
name: Navratil, P.
name: Signoracci, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We derive and compute effective valence-space shell-model interactions from ab-initio coupled-cluster theory and apply them to open-shell and neutron-rich oxygen and carbon isotopes. Our shell-model interactions are based on nucleon-nucleon and three-nucleon forces from chiral effective-field theory. We compute the energies of ground and low-lying states, and find good agreement with experiment. In particular our calculations are consistent with the N=14, 16 shell closures in oxygen-22 and oxygen-24, while for carbon-20 the corresponding N=14 closure is weaker. We find good agreement between our coupled-cluster effective-interaction results with those obtained from standard single-reference coupled-cluster calculations for up to eight valence neutrons.
Point source calibration of the AKARI/FIS all-sky survey maps for staking analysis
Creators: name: Arimatsu, Ko
name: Doi, Yasuo
name: Wada, Takehiko
name: Takita, Satoshi
name: Kawada, Mitsunobu
name: Matsuura, Shuji
name: Ootsubo, Takafumi
name: Kataza, Hirokazu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Investigations of the point spread functions (PSFs) and flux calibrations for stacking analysis have been performed with the far-infrared (wavelengths range of 60 to 140 um all-sky maps taken by the Far-Infrared Surveyor (FIS) onboard the AKARI satellite. The PSFs are investigated by stacking the maps at the positions of standard stars with their fluxes of 0.02 -10 Jy. The derived full widths at the half maximum (FWHMs) of the PSFs are ~ 60 arcsec at 65 and 90 um and ~ 90 arcsec at 140 um, which are much smaller than that of the previous all-sky maps obtained with IRAS (~ 6 arcmin). Any flux dependence in the PSFs is not seen on the investigated flux range. By performing the flux calibrations, we found that absolute photometry for faint sources can be carried out with constant calibration factors, which range from 0.6 to 0.8. After applying the calibration factors, the photometric accuracies for the stacked sources in the 65, 90, and 140 um bands are 9, 3, and 21 %, respectively, even below the detection limits of the survey. Any systematic dependence between the observed flux and model flux is not found. These results indicate that the FIS map is a useful dataset for the stacking analyses of faint sources at far-infrared wavelengths.
description: 15 pages, 6 figures, PASJ, in press
Quasiparticle self-consistent GW method based on the augmented plane-wave and muffin-tin orbital method
Creators: name: Kotani, Takao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have developed the quasiparticle self-consistent GW (QSGW) method based on a recently developed mixed basis all-electron full-potential method (the PMT method), which uses the augmented plane waves (APWs) and the highly localized muffin-tin orbitals (MTOs) simultaneously. We call this PMT-QSGW. Because of the two kinds of augmented bases, we have efficient description of one-particle eigenfunctions in materials with small number of basis functions. In QSGW, we have to treat a static non-local exchange-correlation potential, which is generated from the self-energy. We expand the potential in the highly localized MTOs. This allows us to make stable interpolation of the self-energy in the whole Brillouin zone. In addition, we have improved the offset-Γ method for the Brillouin zone integration, so that we take into account the anisotropy of the screened Coulomb interaction in the calculation of the self-energy. For GaAs and cubic SiO2 , we checked convergence of calculated band gaps on cutoff parameters. PMT-QSGW is implemented in a first-principles electronic structure package ecalj, which is freely available from github.
Synthesis of Teixobactin Analogues and their Biological Evaluation
Creators: name: Parmar, Anish
Publisher: name: University of Lincoln
Year: 2023

description: The work herein is part of my PhD for four years (April 2015- October 2018) at Lincoln University, UK. I have had the opportunity to travel to Temple University, Philadelphia, the USA, to advance my techniques and work on other collaborated projects. Other projects have not been included in this thesis due to the relevancy of work and I had gained enough data on teixobactin to cover this entire thesis.For convenience, I have split the descriptive and experimental sections and numbered tables, figures and references chapter-wise. Since all the work herein has been published by our group, me being the first author/co-joint first author, relevant texts have been directly taken from the articles and permissions have been granted from co-authors for the use of data.The first chapter of the thesis covers - the introduction of bacteria, antibiotics, antimicrobial resistance and teixobactin. The later chapters focus on the efficient synthesis of the teixobactin analogue and the invention of more potent analogues, followed by the final overview of work from myself and others on teixobactin.Please bear in mind, this thesis is a pinnacle of hard work, dedication and support not just by me and my supervisor but a range of collaborators from different research groups who have significantly contributed to the publications received. Happy reading!
The magnetic field generated by a charge in a uniaxial magnetoelectric material
Creators: name: Fechner, Michael
name: Spaldin, Nicola A.
name: Dzyaloshinskii, I. E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We revisit the description of the magnetic field around antiferromagnetic magnetoelectrics in the context of recent developments regarding magnetoelectric monopoles. Using Maxwell's equations, we calculate the magnetic and electric fields associated with a free charge in a bulk uniaxial magnetoelectric, as well as in a finite sphere of magnetoelectric material. We show that a charge in the prototypical magnetoelectric Cr$_2$O$_3$, which is uniaxial with a diagonal magnetoelectric response, induces an internal magnetic field with both monopolar and quadrupolar components, but that only the quadrupolar contribution extends beyond the sample surface. We discuss the behavior of the external quadrupolar field and compare its magnitude to those of magnetic fields from other sources.
Conformational and reactivity studies of lactam esters for their suitability for transannular Dieckmann-type cyclisation towards the azabicyclooctane-scaffold
Creators: name: Weck, Christian
Publisher: name: University of Lincoln
Year: 2023

description: The following thesis describes a novel Dieckmann-type cyclisation of strategically modified, simple caprolactams to the medicinally interesting 7,8-dioxo-6-azabicyclo[3.2.1]octane scaffold. This scaffold is structurally related to the 1,6-diazabicyclo[3.2.1]octane, the core motif of the ?-lactamase inhibitor Avibactam. The presented thesis will outline the considerations and evaluation of crucial concepts of caprolactams, their general chemistry and mechanistic studies of importance to this novel approach towards the bicyclic scaffold. The initial discovery and first attempts at optimisation are presented, which led to a study into the physicochemical behaviour of lactams. During the investigations, it was found that the scarce fundamental research on this long-known group of compounds could not provide enough insight to deliver a comprehensive understanding of the involved mechanism. For that reason, we were additionally interested in the solid-state behaviour of lactams, which led to the first ever published single-crystal structure of free ?-valerolactam without secondary components. This allowed for previously conducted theoretical experiments on the amide bond situation of ?-valerolactam to be disproven and also allowed for the abnormally fast hydrolysis of ?-valerolactam to be explained through empirical evidence. The conclusions drawn from the comparative studies on the homologous series of lactam led to a broader study on the conformational behaviour, leading hydrogen-bonding motifs, general packing in the solid-state and the effects of substitution on the amide bond of selected lactams of various ring sizes. The results from this first ever comprehensive investigation on selected caprolactam esters led to the development of a convenient, one-pot synthesis of the 7,8-dioxo-6-azabicyclo[3.2.1]octane core structure from a simple caprolactam in good yields, with the potential for the preparation of a wide variety of derivatives. This Dieckmann-type cyclisation reaction is discussed in terms of its mechanism and its possibilities for further modifications. Further synthetic effort towards the introduction of specific functional groups for the establishment of water solubility and bioactivity are presented. Parts of the here presented thesis have already been successfully published in influential peer-reviewed journals and it is expected that further such publications will follow.
Population genetics on islands connected by an arbitrary network: An analytic approach
Creators: name: Constable, George W A
name: McKane, Alan J
Publisher: name: arXiv
Year: 2014
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We analyse a model consisting of a population of individuals which is subdivided into a finite set of demes, each of which has a fixed but differing number of individuals. The individuals can reproduce, die and migrate between the demes according to an arbitrary migration network. They are haploid, with two alleles present in the population; frequency independent selection is also incorporated, where the strength and direction of selection can vary from deme to deme. The system is formulated as an individual-based model, and the diffusion approximation systematically applied to express it as a set of nonlinear coupled stochastic differential equations. These can be made amenable to analysis through the elimination of fast-time variables. The resulting reduced model is analysed in a number of situations, including migration-selection balance leading to a polymorphic equilibrium of the two alleles, and an illustration of how the subdivision of the population can lead to non-trivial behaviour in the case where the network is a simple hub. The method we develop is systematic, may be applied to any network, and agrees well with the results of simulations in all cases studied and across a wide range of parameter values.
The effect of sideband ratio on line intensity for Herschel/HIFI
Creators: name: Higgins, Ronan
name: Teyssier, David
name: Borys, Colin
name: Braine, Jonathan
name: Comito, Claudia
name: Delforge, Bertrand
name: Helmich, Frank
name: Olberg, Michael
name: Ossenkopf, Volker
name: Pearson, John
name: Shipman, Russell
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Heterodyne Instrument for the Far Infrared (HIFI) on board the Herschel Space Observatory is composed of a set of fourteen double sideband mixers. We discuss the general problem of the sideband ratio (SBR) determination and the impact of an imbalanced sideband ratio on the line calibration in double sideband heterodyne receivers. The HIFI SBR is determined from a combination of data taken during pre-launch gas cell tests and in-flight. The results and some of the calibration artefacts discovered in the gas cell test data are presented here along with some examples of how these effects appear in science data taken in orbit.
description: 21 pages, 10 figues. To be published in special Herschel calibration issue of Experimental Astronomy
Optical frequency comb technology for ultra-broadband radio-frequency photonics
Creators: name: Torres-Company, Victor
name: Weiner, Andrew M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The outstanding phase-noise performance of optical frequency combs has led to a revolution in optical synthesis and metrology, covering a myriad of applications, from molecular spectroscopy to laser ranging and optical communications. However, the ideal characteristics of an optical frequency comb are application dependent. In this review, the different techniques for the generation and processing of high-repetition-rate (>10 GHz) optical frequency combs with technologies compatible with optical communication equipment are covered. Particular emphasis is put on the benefits and prospects of this technology in the general field of radio-frequency photonics, including applications in high-performance microwave photonic filtering, ultra-broadband coherent communications, and radio-frequency arbitrary waveform generation.
description: to appear in Laser and Photonics Reviews
Populism, Polarization, and Post-Election Emotions - PAP
Creators: name: Dahjin Kim
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: Political Science
subject: FOS: Political science
subject: social media
subject: polarization
subject: populism
subject: emotion
subject: election

description: This registration contains the correct pre-analysis plan document for the pre-registered study.
Quantum phase transition in one-dimensional commensurate Frenkel-Kontorova model
Creators: name: Ma, Yongjun
name: Wang, Jiaxiang
name: Xu, Xinye
name: Wei, Qi
name: Kais, Sabre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we have studied the one-dimensional commensurate quantum Frenkel-Kontorova model by a density-matrix renormalization group (DMRG) algorithm. The focus has been on its properties of the entanglement, the coordinate correlation, the ground state energy and the energy gap between the ground state and the first excited one. It is demonstrated that a quantum phase transition (QPT) between the pinned and the sliding phases takes place as the quantum fluctuation, measured by an effective Planck constant $\tilde\hbar$, increases to a threshold value $\tilde \hbar_c$.
Шорин С.А. Управленческая деятельность государства как элемент механизма осуществления бюджетных расходов (финансово-правовой анализ) // Финансовое право. 2019. № 2. С. 42-46.
Creators: name: Shorin, Sergey
Publisher: name: figshare
Year: 2020
Subjects: subject: Law
subject: FOS: Law
subject: 150201 Finance
subject: FOS: Economics and business
subject: 160509 Public Administration
subject: FOS: Political science

description: Целью настоящей статьи является оценка состояния управленческой деятельности государства в механизме осуществления бюджетных расходов. Автор рассматривает ряд недостатков правового регулирования управленческой деятельности на стадиях составления, утверждения законов о бюджетах и внесения изменений в них, а также при осуществлении финансового контроля. В статье отмечаются негативные проявления административного усмотрения при принятии органами государственной власти решений в бюджетной сфере. Автор обращает внимание на отступления от принципа прозрачности при утверждении и внесении изменений в федеральный бюджет. Для решения выявленных проблем предлагается определить порядок подготовки проектов законов о бюджетах и изменений в них в форме приказа Минфина России, при этом установить в Бюджетном кодексе Российской Федерации критерии принятия либо отклонения этих проектов законов и изменений. Также автор приходит к выводу о необходимости закрепления постановлением Правительства Российской Федерации критериев оценки приоритетности бюджетных расходов. Кроме того, целесообразно максимально формализовать и упорядочить правоотношения, возникающие при проведении финансово-контрольных мероприятий, и повысить прозрачность стадий составления и утверждения проектов бюджетов.
A preliminary survey on optimized multiobjective metaheuristic methods for data clustering using evolutionary approaches
Creators: name: Kurada, Ramachandra Rao
name: Pavan, Dr. K Karteeka
name: Rao, Dr. AV Dattareya
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The present survey provides the state-of-the-art of research, copiously devoted to Evolutionary Approach (EAs) for clustering exemplified with a diversity of evolutionary computations. The Survey provides a nomenclature that highlights some aspects that are very important in the context of evolutionary data clustering. The paper missions the clustering trade-offs branched out with wide-ranging Multi Objective Evolutionary Approaches (MOEAs) methods. Finally, this study addresses the potential challenges of MOEA design and data clustering, along with conclusions and recommendations for novice and researchers by positioning most promising paths of future research. MOEAs have substantial success across a variety of MOP applications, from pedagogical multifunction optimization to real-world engineering design. The survey paper noticeably organizes the developments witnessed in the past three decades for EAs based metaheuristics to solve multiobjective optimization problems (MOP) and to derive significant progression in ruling high quality elucidations in a single run. Data clustering is an exigent task, whose intricacy is caused by a lack of unique and precise definition of a cluster. The discrete optimization problem uses the cluster space to derive a solution for Multiobjective data clustering. Discovery of a majority or all of the clusters (of illogical shapes) present in the data is a long-standing goal of unsupervised predictive learning problems or exploratory pattern analysis.
description: 21 Pages
Survey for δ Sct components in eclipsing binaries and new correlations between pulsation frequency and fundamental stellar characteristics
Creators: name: Liakos, Alexios
name: Niarchos, Panagiotis
name: Soydugan, Esin
name: Zasche, Petr
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: CCD observations of 68 eclipsing binary systems, candidates for containing δ Scuti components, were obtained. Their light curves are analysed using the PERIOD04 software for possible pulsational behaviour. For the systems QY Aql, CZ Aqr, TY Cap, WY Cet, UW Cyg, HL Dra, HZ Dra, AU Lac, CL Lyn and IO UMa, complete light curves were observed due to the detection of a pulsating component. All of them, except QY Aql and IO UMa, are analysed with modern astronomical softwares in order to determine their geometrical and pulsational characteristics. Spectroscopic observations of WY Cet and UW Cyg were used to estimate the spectral class of their primary components, while for HZ Dra radial velocities of its primary were measured. O - C diagram analysis was performed for the cases showing peculiar orbital period variations, namely CZ Aqr, TY Cap, WY Cet and UW Cyg, with the aim of obtaining a comprehensive picture of these systems. An updated catalogue of 74 close binaries including a δ Scuti companion is presented. Moreover, a connection between orbital and pulsation periods, as well as a correlation between evolutionary status and dominant pulsation frequency for these systems, is discussed.
description: 13 pages, 22 figures, 8 tables
Accountable decisions and citizens' fairness perceptions
Creators: name: Brummel, Lars
name: De Blok, Lisanne
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Public Administration
subject: Public Affairs, Public Policy and Public Administration
subject: Political Science
subject: FOS: Political science
subject: Social and Behavioral Sciences
subject: vignette experiment
subject: procedural fairness
subject: accountability

description: A vignette experiment about the effects of political and social accountabilities on citizens' fairness perceptions
Molecular Outflows Driven by Low-Mass Protostars. I. Correcting for Underestimates When Measuring Outflow Masses and Dynamical Properties
Creators: name: Dunham, Michael M.
name: Arce, Héctor G.
name: Mardones, Diego
name: Lee, Jeong-Eun
name: Matthews, Brenda C.
name: Stutz, Amelia M.
name: Williams, Jonathan P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a survey of 28 molecular outflows driven by low-mass protostars, all of which are sufficiently isolated spatially and/or kinematically to fully separate into individual outflows. Using a combination of new and archival data from several single-dish telescopes, 17 outflows are mapped in CO (2-1) and 17 are mapped in CO (3-2), with 6 mapped in both transitions. For each outflow, we calculate and tabulate the mass, momentum, kinetic energy, mechanical luminosity, and force assuming optically thin emission in LTE at an excitation temperature of 50 K. We show that all of the calculated properties are underestimated when calculated under these assumptions. Taken together, the effects of opacity, outflow emission at low velocities confused with ambient cloud emission, and emission below the sensitivities of the observations increase outflow masses and dynamical properties by an order of magnitude, on average, and factors of 50-90 in the most extreme cases. Different (and non-uniform) excitation temperatures, inclination effects, and dissociation of molecular gas will all work to further increase outflow properties. Molecular outflows are thus almost certainly more massive and energetic than commonly reported. Additionally, outflow properties are lower, on average, by almost an order of magnitude when calculated from the CO (3-2) maps compared to the CO (2-1) maps, even after accounting for different opacities, map sensitivities, and possible excitation temperature variations. It has recently been argued in the literature that the CO (3-2) line is subthermally excited in outflows, and our results support this finding.
description: Accepted by ApJ. 21 pages + 12 pages of references and appendices, 15 figures
Does Selection or Plasticity by UV-B Radiation Drive Variation in UV-Absorbing Area of Flowers?
Creators: name: Gray, Liberty
Publisher: name: University of Lincoln
Year: 2023

description: This thesis will be set out in five chapters. The first outlines the introduction and the rationale of the research. Chapters 2-4 describe and discuss the methods and results of the three component studies in detail. Chapter 2 is written in the style of a manuscript for New Phytologist, and Chapters 3 and 4 are written in the style of the Journal of Experimental Botany. The intent is for these chapters to be edited and submitted for publication at a later date. The final chapter summarizes and discusses the findings of the three studies as a whole, before concluding the thesis
Zig-zag Sort: A Simple Deterministic Data-Oblivious Sorting Algorithm Running in O(n log n) Time
Creators: name: Goodrich, Michael T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We describe and analyze Zig-zag Sort--a deterministic data-oblivious sorting algorithm running in O(n log n) time that is arguably simpler than previously known algorithms with similar properties, which are based on the AKS sorting network. Because it is data-oblivious and deterministic, Zig-zag Sort can be implemented as a simple O(n log n)-size sorting network, thereby providing a solution to an open problem posed by Incerpi and Sedgewick in 1985. In addition, Zig-zag Sort is a variant of Shellsort, and is, in fact, the first deterministic Shellsort variant running in O(n log n) time. The existence of such an algorithm was posed as an open problem by Plaxton et al. in 1992 and also by Sedgewick in 1996. More relevant for today, however, is the fact that the existence of a simple data-oblivious deterministic sorting algorithm running in O(n log n) time simplifies the inner-loop computation in several proposed oblivious-RAM simulation methods (which utilize AKS sorting networks), and this, in turn, implies simplified mechanisms for privacy-preserving data outsourcing in several cloud computing applications. We provide both constructive and non-constructive implementations of Zig-zag Sort, based on the existence of a circuit known as an epsilon-halver, such that the constant factors in our constructive implementations are orders of magnitude smaller than those for constructive variants of the AKS sorting network, which are also based on the use of epsilon-halvers.
description: Appearing in ACM Symp. on Theory of Computing (STOC) 2014
A density-matrix renormalization group Study of one-dimensional incommensurate quantum Frenkel-Kontorova model
Creators: name: Ma, Yongjun
name: Wang, Jiaxiang
name: Xu, Xinye
name: Wei, Qi
name: Kais, Sabre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, the one-dimensional incommensurate quantum Frenkel-Kontorova model is investigate by a density-matrix renormalization group algorithm. Special attention is given to the entanglement and the ground state energy. The energy gap between the ground state and the first excited is also calculated. From all the numerical results, we have observed an obvious property changes from the pinned state to the sliding one as the quantum fluctuation is increased. But no expected quantum critical point can be justified by the present data.
Thermo-electrochemistry of boron doped diamond from fundamentals to application.
Creators: name: Meng, Lingcong
Publisher: name: University of Lincoln
Year: 2023

description: Boron doped diamond (BDD), due to its exceptional electrochemical response (extended solvent window and low background current) and thermal properties (large thermal diffusivity and extreme resistance to thermal ablation), is investigated as the electrode material for thermoelectrochemical studies. A pulsed infrared (IR) laser technique is used to heat the electrode from the back (nonsolution) side. The non-isothermal pulsed technique enables mass transport to be more readily controlled as opposed to isothermal heating approaches such as a water bath.The effect of temperature on fundamental electrochemical processes, such as mass transport, electron transfer (ET) kinetics and thermodynamics of both outer sphere and inner sphere redox mediators is investigated on both BDD macro- and micro- electrodes. The effective temperature increase at electrode surface can be determined both experimentally and theoretically using finite element models. Enhanced mass transport and ET process at elevated temperatures, in addition to the temperature coefficient of the redox mediators, play a crucial role in the temperature dependent electrochemical response.Thermoelectrochemical studies are extended to an electroactive species which forms a solid structure after electrolysis. In particular, the cathodic electrodeposition of lead/lead oxide (Pb/PbO) under non-isothermal heating conditions in nitrate containing solutions is investigated. The effect of deposition potential, time, dissolved oxygen content and temperature are explored to understand the mechanism for the synthesis of crystalline PbO “plate” structures, and the role of electrodeposited Pb.Further work explores the effect of temperature on an electroactive species which upon electrolysis forms a solid product which fouls the electrode surface. Using a BDD microelectrode it is possible to show how temperature can be used to minimise the effect of surface blocking after the oxidation of a neurotransmitter, dopamine, which is known to lead to electrode fouling.Finally, proof of concept studies are undertaken to assess the suitability of a thermoelectrochemical approach to the detection of single nucleotide polymorphism (SNP) in deoxyribonucleic acid (DNA). Initial studies investigate immobilisation strategies for both (in separate experiments) electrochemically active self-assembled monolayers (SAM) and redox-labelled double stranded DNA on gold and BDD electrodes.
MBRA-2: a Modified Chemostat System to Culture Biofilms
Creators: name: Jens, Justin N.
name: Breiner, Daniel J.
name: Neve, Rachel L.
name: Fiebig, Matilda M.
name: Phelan, Vanessa V.
Publisher: name: Zenodo
Year: 2022
Subjects: MBRA-2
Microbiome
Bioreactor

description: CAD (Computer-Aided Design) .stl files for stereolithography production of minibioreactor array 2 (MBRA-2) reactor strip and lid. CAD (Computer-Aided Design) .stp files for injection mold production of minibioreactor array 2 (MBRA-2) reactor strip and lid (not validated). .jpg for custom die cut MBRA-2 gasket Supplemental Material describing assembly of the MBRA-2 with media rails Video of MBRA-2 Assembly
A photometric study of the neglected eclipsing binaries: V405 Cep, V948 Her, KR Mon and UZ Sge
Creators: name: Liakos, Alexios
name: Niarchos, Panagiotis
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: CCD multi-band light curves of the neglected eclipsing binaries V405 Cep, V948 Her, KR Mon and UZ Sge were obtained and analysed using the Wilson-Devinney code. New geometric and absolute parameters were derived and used to determine their current evolutionary state. V405 Cep, V948 Her and KR Mon are detached systems with their components in almost the same evolutionary stage. UZ Sge is a classical Algol system with a tertiary companion around it. Moreover, since the systems V405 Cep, V948 Her and UZ Sge contain an early type component, their light curves were examined for possible pulsation behaviour.
description: 9 pages, 14 figures, 4 tables
Superhabitable Worlds
Creators: name: Heller, René
name: Armstrong, John
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: To be habitable, a world (planet or moon) does not need to be located in the stellar habitable zone (HZ), and worlds in the HZ are not necessarily habitable. Here, we illustrate how tidal heating can render terrestrial or icy worlds habitable beyond the stellar HZ. Scientists have developed a language that neglects the possible existence of worlds that offer more benign environments to life than Earth does. We call these objects "superhabitable" and discuss in which contexts this term could be used, that is to say, which worlds tend to be more habitable than Earth. In an appendix, we show why the principle of mediocracy cannot be used to logically explain why Earth should be a particularly habitable planet or why other inhabited worlds should be Earth-like. Superhabitable worlds must be considered for future follow-up observations of signs of extraterrestrial life. Considering a range of physical effects, we conclude that they will tend to be slightly older and more massive than Earth and that their host stars will likely be K dwarfs. This makes Alpha Centauri B, member of the closest stellar system to the Sun that is supposed to host an Earth-mass planet, an ideal target for searches of a superhabitable world.
description: Published in Astrobiology (Jan. 2014), 18 pages, 3 color figures
An Examination Of Peer Support Behaviours enacted in Stanford’s Principles of Economics Massive Open Online Course
Creators: name: Appiah-Kubi, Kwamena
Publisher: name: University of Lincoln
Year: 2023

description: The primary aim of the researcher in this study is to examine the interactions of participants in a massive open online course (MOOC) from a new perspective, specifically focused on social interactions and peer support. So far, most studies on participants’ interactions in MOOCs have utilised surveys and computational statistics procedures across several MOOCs with results highlighting broad interaction patterns.In this study, the researcher shifts the focus to a single MOOC utilising the elements of Teaching and Social Presence from the Community of Inquiry framework to examine the online text-based discussion forum of a MOOC where participants in the course interacted with each other. This led to the development of a typology characterising the social interactions and peer support observed.MOOCs enable students all over the world to access learning resources from various institutions across the globe. MOOCs, by their nature, attract thousands of participants with a broad spectrum of experiences and interests. This presents its own set of challenges and opportunities. One such challenge in MOOCs is the very low instructor-participant interaction due to the handful of available facilitators to cater to the large number of participants. MOOC literature suggests that participants have varied levels of knowledge, with some being professionals taking the course out of interest. Opportunity hence exists for participants to support each other with their learning. However, the literature also suggests that the development of interpersonal relationships may be stifled due to the large number of participants. The results of this study show that participants do provide support to their fellow. However, only a small subset of teaching presence was actively carried out, with the most predominant being Direct Instruction, which captures the provision of resources and illustrative examples to answer questions or provide feedback. The social environment was also observed to be open and relaxed, allowing participants to express their ideas freely. However, the results also show that the interactions were not towards community building.This research constitutes an original contribution to knowledge because of its use of content analysis to assess peer exchanges in a discussion forum of a MOOC to develop a typology of participants’ social and peer support interactions. This provides valuable insight that can inform future research directions as well as pedagogical strategies course designers and facilitators can employ in their courses.
Optical phase coherent timing of the Crab nebula pulsar with Iqueye at the ESO New Technology Telescope
Creators: name: Zampieri, L.
name: Čadež, A.
name: Barbieri, C.
name: Naletto, G.
name: Calvani, M.
name: Barbieri, M.
name: Verroi, E.
name: Zoccarato, P.
name: Occhipinti, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Crab nebula pulsar was observed in 2009 January and December with a novel very fast optical photon counter, Iqueye, mounted at the ESO 3.5 m New Technology Telescope. Thanks to the exquisite quality of the Iqueye data, we computed accurate phase coherent timing solutions for the two observing runs and over the entire year 2009. Our statistical uncertainty on the determination of the phase of the main pulse and the rotational period of the pulsar for short (a few days) time intervals are $\approx 1 \, μ$s and ~0.5 ps, respectively. Comparison with the Jodrell Bank radio ephemerides shows that the optical pulse leads the radio one by ~240 $μ$s in January and ~160 $μ$s in December, in agreement with a number of other measurements performed after 1996. A third-order polynomial fit adequately describes the spin-down for the 2009 January plus December optical observations. The phase noise is consistent with being Gaussian distributed with a dispersion $σ$ of $\approx 15 \, μ$s in most observations, in agreement with theoretical expectations for photon noise-induced phase variability.
description: 10 pages, 5 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society
Groups and Lie rings with a Frobenius group of automorphisms
Creators: name: Iusa, Valentina
Publisher: name: University of Lincoln
Year: 2023

description: Suppose that a Frobenius group F H, with kernel F and complement H, acts by automorphisms on a finite group G. Work of E. Khukhro, N. Makarenko and P. Shumyatsky showed that many properties of G are influenced by the corresponding properties of the centraliser of H in G, and possibly by the order of H as well. In particular, they proved that if F is cyclic acting fixed-point-freely and the centraliser of H is nilpotent of class c, then the nilpotency class of G can be bounded from above by a function of c and the order of H.In this thesis we prove that the dependence of the bound on the order of the Frobenius complement is essential, by constructing an explicit example. We also discuss a generalisation of the quoted result of Khukhro, Makarenko and Shumyatsky to the case of abelian non-cyclic kernels.These results are obtained by application of different Lie ring methods. In the former case, the desired family of groups is constructed by using the Lazard correspondence. The latter result relies on properties of Lie rings admitting a grading over an abelian group with few non-trivial components and many commuting components.The final chapter can be read independently of the rest of the thesis. In fact it presents our contribution to a different and independent problem, that is the classification of certain Lie algebras of maximal class
Power Spectrum Analysis of Polarized Emission from the Canadian Galactic Plane Survey
Creators: name: Stutz, R. A.
name: Rosolowsky, E. W.
name: Kothes, R.
name: Landecker, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Angular power spectra are calculated and presented for the entirety of the Canadian Galactic Plane Survey polarization dataset at 1.4 GHz covering an area of 1060 deg$^2$. The data analyzed are a combination of data from the 100-m Effelsberg Telescope, the 26-m Telescope at the Dominion Radio Astrophysical Observatory, and the Synthesis Telescope at the Dominion Radio Astrophysical Observatory, allowing all scales to be sampled down to arcminute resolution. The resulting power spectra cover multipoles from $\ell \approx 60$ to $\ell \approx 10^4$ and display both a power-law component at low multipoles and a flattening at high multipoles from point sources. We fit the power spectrum with a model that accounts for these components and instrumental effects. The resulting power-law indices are found to have a mode of 2.3, similar to previous results. However, there are significant regional variations in the index, defying attempts to characterize the emission with a single value. The power-law index is found to increase away from the Galactic plane. A transition from small-scale to large-scale structure is evident at $b= 9^{\circ}$, associated with the disk-halo transition in a 15$^{\circ}$ region around $l=108^{\circ}$. Localized variations in the index are found toward HII regions and supernova remnants, but the interpretation of these variations is inconclusive. The power in the polarized emission is anticorrelated with bright thermal emission (traced by H$α$ emission) indicating that the thermal emission depolarizes background synchrotron emission.
description: Accepted to ApJ; 17 pages
Вестник Российского нового университета серия «Сложные системы: модели, анализ, управление», Выпуск 32018
Creators: name: Автономная некоммерческая организация высшего образования «Российский новый университет»
Publisher: name: Вестник Российского нового университета серия «Сложные системы: модели, анализ, управление»
Year: 2018

description: , Выпуск 32018
Lorentz Force Electrical Impedance Tomography
Creators: name: Grasland-Mongrain, Pol
name: Mari, Jean-Martial
name: Chapelon, Jean-Yves
name: Lafon, Cyril
Publisher: name: arXiv
Year: 2014
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: This article describes a method called Lorentz Force Electrical Impedance Tomography. The electrical conductivity of biological tissues can be measured through their sonication in a magnetic field: the vibration of the tissues inside the field induces an electrical current by Lorentz force. This current, detected by electrodes placed around the sample, is proportional to the ultrasonic pressure, to the strength of the magnetic field and to the electrical conductivity gradient along the acoustic axis. By focusing at different places inside the sample, a map of the electrical conductivity gradient can be established. In this study experiments were conducted on a gelatin phantom and on a beef sample, successively placed in a 300 mT magnetic field and sonicated with an ultrasonic transducer focused at 21 cm emitting 500 kHz bursts. Although all interfaces are not visible, in this exploratory study a good correlation is observed between the electrical conductivity image and the ultrasonic image. This method offers an alternative to detecting pathologies invisible to standard ultrasonography.
Erasure codes with simplex locality
Creators: name: Kuijper, Margreta
name: Napp, Diego
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 11T71

description: We focus on erasure codes for distributed storage. The distributed storage setting imposes locality requirements because of easy repair demands on the decoder. We first establish the characterization of various locality properties in terms of the generator matrix of the code. These lead to bounds on locality and notions of optimality. We then examine the locality properties of a family of non-binary codes with simplex structure. We investigate their optimality and design several easy repair decoding methods. In particular, we show that any correctable erasure pattern can be solved by easy repair.
description: submitted in December 2013 to Mathematical Theory of Networks and Systems (MTNS) International Symposium 2014