cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A major optical & X-ray outburst from the Magellanic Bridge source RX J0209.6-7427
Creators: name: Coe, Malcolm J.
name: Monageng, Itumeleng M.
name: Bartlett, Elizabeth S.
name: Buckley, David A. H.
name: Udalski, Andrzej
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: RX J0209.6-7427 is an X-ray source in the Magellanic Bridge that was first detected in 1993, but not seen again till 2019. It has been identified as a member of the Be/X-ray binary class, a category of objects that are well established as bright, often-unpredictable transients. Such systems are rarely known in the Bridge, possibly because they lie outside the area most commonly studied by X-ray telescopes. Whatever the reason for the sparse number of such systems in the Bridge, they can provide useful tools for trying to understand the result of the tidal dynamics of the two Magellanic Clouds. In this paper the nature of the object is explored with the help of new data obtained during the latest outburst. In particular, the first optical spectrum of the counterpart is presented to help classify the star, plus measurements of the Balmer emission lines over several years are used to investigate changes in the size and structure of the circumstellar disk.
description: 6 pages, 6 figures. Accepted for publication in MNRAS
A general condition of inflationary cosmology on trans-Planckian physics
Creators: name: Ke, Ke
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a more general initial condition satisfying the minimal uncertainty relationship. We calculate the power spectrum of a simple model in inflationary cosmology. The results depend on perturbations generated below a fundamental scale, e.g. the Planck scale.
description: 7 pages, References added
On the number of planar Eulerian orientations
Creators: name: Bonichon, Nicolas
name: Bousquet-Mélou, Mireille
name: Dorbec, Paul
name: Pennarun, Claire
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The number of planar Eulerian maps with n edges is well-known to have a simple expression. But what is the number of planar Eulerian orientations with n edges? This problem appears to be difficult. To approach it, we define and count families of subsets and supersets of planar Eulerian orientations, indexed by an integer k, that converge to the set of all planar Eulerian orientations as k increases. The generating functions of our subsets can be characterized by systems of polynomial equations, and are thus algebraic. The generating functions of our supersets are characterized by polynomial systems involving divided differences, as often occurs in map enumeration. We prove that these series are algebraic as well. We obtain in this way lower and upper bounds on the growth rate of planar Eulerian orientations, which appears to be around 12.5.
SOCIO-ECONOMIC FORMATIONS AND THE STUDY OF SOCIETY (HISTORICAL MATERIALISM, SOCIOLOGICAL THEORY, SOCIAL STRUCTURE/CHANGE, PHILOSOPHY OF HISTORY)
Creators: name: Abu-Amr, Ali Mahmoud
Publisher: name: American University
Year: 2023

description: The subject of this study is the concept of socio-economic formation, its theoretical content and its place in the context of historical materialism, the Marxist general theory and methodology of all social sciences including sociology. The first chapter introduces the Marxist conception of the history of mankind and clarifies the significance of the term social formation in that conception. The interaction of the basic subconcepts of social formation is investigated in the second chapter. The basic structural concepts of social formation are the mode of production, which includes the forces of production and production relations; the economic basis; and the superstructure. Chapter three treats the correspondence of production relations to the nature and level of development of the forces of production, which underlies the historical movement of society in general, as a progressive succession of socio-economic formations. Chapter four clarifies the idea that the treatment of the concept of social formation out of its theoretical content and its theoretical framework could not contribute to social sciences or to social practice. In the final chapter, this study responds to the claimed crisis of sociological theory, and discloses the Marxist alternative. Marxists view the conception of social formations, in its theoretical framework of historical materialism, as elevating sociology to the level of science. The proposed five basic stages in the evolution and transition of the non-communist formation elaborate on the theory of socio-economic formations, and contribute to the study of social change in concrete societies. This study also discloses the basic principles of historical materialism, which constitutes the basis for particular sociological theories and methodologies of particular sociological fields. These particular sociological theories, linked with historical materialism, should constitute the theoretical and methodological bases for the methods of concrete sociological research.
Additional file 1 of Hypoxia-preconditioned mesenchymal stem cells prevent renal fibrosis and inflammation in ischemia-reperfusion rats
Creators: name: Ishiuchi, Naoki
name: Nakashima, Ayumu
name: Doi, Shigehiro
name: Yoshida, Ken
name: Maeda, Satoshi
name: Kanai, Ryo
name: Yamada, Yumi
name: Ike, Takeshi
name: Doi, Toshiki
name: Kato, Yukio
name: Masaki, Takao
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology

description: Additional file 1. Only slight interstitial fibrosis occurs at 7 days post-IRI. Representative images of HE, Masson trichrome, and Sirius red staining in kidney sections at 7 days post-IRI (scale bar = 100 μm).
SOCIO-ECONOMIC FORMATIONS AND THE STUDY OF SOCIETY (HISTORICAL MATERIALISM, SOCIOLOGICAL THEORY, SOCIAL STRUCTURE/CHANGE, PHILOSOPHY OF HISTORY)
Creators: name: Abu-Amr, Ali Mahmoud
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society

description: The subject of this study is the concept of socio-economic formation, its theoretical content and its place in the context of historical materialism, the Marxist general theory and methodology of all social sciences including sociology. The first chapter introduces the Marxist conception of the history of mankind and clarifies the significance of the term social formation in that conception. The interaction of the basic subconcepts of social formation is investigated in the second chapter. The basic structural concepts of social formation are the mode of production, which includes the forces of production and production relations; the economic basis; and the superstructure. Chapter three treats the correspondence of production relations to the nature and level of development of the forces of production, which underlies the historical movement of society in general, as a progressive succession of socio-economic formations. Chapter four clarifies the idea that the treatment of the concept of social formation out of its theoretical content and its theoretical framework could not contribute to social sciences or to social practice. In the final chapter, this study responds to the claimed crisis of sociological theory, and discloses the Marxist alternative. Marxists view the conception of social formations, in its theoretical framework of historical materialism, as elevating sociology to the level of science. The proposed five basic stages in the evolution and transition of the non-communist formation elaborate on the theory of socio-economic formations, and contribute to the study of social change in concrete societies. This study also discloses the basic principles of historical materialism, which constitutes the basis for particular sociological theories and methodologies of particular sociological fields. These particular sociological theories, linked with historical materialism, should constitute the theoretical and methodological bases for the methods of concrete sociological research.
Radiative $p_{\perp}$-broadening of fast partons in an expanding quark-gluon plasma
Creators: name: Zakharov, B. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study contribution of radiative processes to $p_{\perp}$-broadening of fast partons in an expanding quark-gluon plasma. It is shown that the radiative correction to $\langle p_{\perp}^2\rangle$ for the QGP produced in $AA$-collisions at RHIC and LHC may be negative, and comparable in absolute value with the non-radiative contribution. We have found that the QGP expansion enhances the radiative suppression of $p_\perp$-broadening as compared to the static medium.
description: 11 pages, 1 figure. Accepted in Eur.Phys.J. C
Accessing outdoor public space on campus
Creators: name: Mendosa, Glenn
Publisher: name: The University of British Columbia
Year: 2016

description: Considerable academic work, specifically within the humanities, has sought to explore the role of place and place-making in the construction of individual and group meaning. Some of geography’s key contemporary contributions to the study of place have emphasized its processual, open, material, power-laden, and relational qualities. While the degree to which individuals control their movement, connection to, and position within the network of power in place remains contested across the field of place-theory, it has become consensus that human interactional processes are principal contributors to the creation of meaning and affect in place. Opening up understandings of place to include this material existence of bodies, and the lived/affective experiences that accompany them, allow for a more grounded interpretation of place. For the purpose of this study, I want to draw attention to the impact of accessibility and its role in the use of outdoor space; a seminal and foundational site through which opportunities for sense of place can be realized, and as influential in enabling place-making processes. Though notions of access to both space and place are readily explored in text, accounts often emphasize access, or lack there of, in relation to the ableness of bodies; to social, racial, and class mobility. I hope to extend some of these discussions of power relations while emphasizing access in the context of student-institutional relations, and the influence of access in mediating relationships between these bodies. Consequently, this study is primarily concerned with the ways in which various student-led groups/organizations at the University of British Columbia (UBC) access, experience, and thus negotiate outdoor, public space on the Vancouver campus. A complimentary aim of the study is to explore how varying group practices reveal the impact of accessibility on the promotion of place-making and the construction of student community and wellbeing. These considerations and nuanced intersections between place, access, and community are particularly significant because, “to feel connected to place is to experience a sense of belonging in place that itself generates resources of immense value in the promotion of health and wellbeing” (Duff, 2010, p. 893). This suggests a direct stake for universities (in general) to invest in understandings of place and place-making, particularly from the students’ perspective. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Neutrino Masses and Mixing, Quark-lepton Symmetry and Strong Right-handed Neutrino Hierarchy
Creators: name: Dermisek, Radovan
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Assuming the same form of all mass matrices as motivated by quark-lepton symmetry, we discuss conditions under which bi-large mixing in the lepton sector can be obtained with a minimal amount of fine tuning requirements for possible models. We assume hierarchical mass matrices, dominated by the 3-3 element, with off-diagonal elements much smaller than the larger neighboring diagonal element. Characteristic features of this scenario are strong hierarchy in masses of right-handed neutrinos, and comparable contributions of both lighter right-handed neutrinos to the resulting left-handed neutrino Majorana mass matrix. Due to obvious quark lepton symmetry, this approach can be embedded into grand unified theories. The mass of the lightest neutrino does not depend on details of a model in the leading order. The right-handed neutrino scale can be identified with the GUT scale in which case the mass of the lightest neutrino is given as (m_{top}^2/M_{GUT}) |U_{τ1}|^2.
description: 7 pages
Hamistyelicola Kim & Boxshall 2021, gen. nov.
Creators: name: Kim, Il-Hoi
name: Boxshall, Geoff A.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Cyclopoida
Ascidicolidae
Hamistyelicola

description: Hamistyelicola gen. nov.
 Diagnosis. Body slender; prosome-urosome division not distinct. Prosome 5-segmented. Urosome 6-segmented. Spinose pad present ventrally between pre-anal and anal somites. Caudal ramus bearing 6 setae. Rostrum not developed. Antennule 7-segmented. Antenna 3-segmented, bearing terminal claw; all segments armed. Mandible consisting of coxa with well-developed gnathobase bearing 4 major teeth on medial margin, and biramous palp, armed with 6 setae on endopod and 1 seta on tip of small exopod. Maxillule consisting of precoxa and biramous palp; precoxa bearing 7 to 9 setae on arthrite; palp bearing 5 setae on basis, 2 setae on exopod, and 6 setae on endopod; exopod and endopod articulated from or fused with basis. Maxilla 2- or 3-segmented; first segment (syncoxa) with single endite tipped with 3 setae; second segment (allobasis) or second and third segments (basis and endopod) bearing 8 or 9 setae in total, lacking claw. Maxilliped 1 or 2-segmented, armed with 4 or 5 setae. Legs 1-4 broad, biramous with 2-segmented rami; coxa unarmed; basis with large outer seta. Basis of leg 1 bearing inner distal spine. Spines on exopods and endopods distinct. Distal segment of exopod of legs 2-4 transformed to large, powerful hook. Leg 5 consisting of lamellate protopod bearing 1 seta distally and small exopod bearing 6 setae. Leg 6 represented by 3 dentiform processes on genital operculum.
 Type species. eamẚstyelẚcçla lẚghtẚ (Illg & Dudley, 1980) comb. nov. (originally as Styelẚcçla lẚghtẚ), by original designation.
 Other included species. eamẚstyelẚcçla mçnnẚçtçrum gen. et sp. nov.
 Etymology. The name is derived from the Latin ham (=hooked) and the generic name Styelẚcçla. Gender masculine.
 Remarks. The most outstanding feature of eamẚstyelẚcçla gen. nov. is the transformation of the second exopodal segment of legs 2-4 into a powerful hook. The discovery of a second species possessing this hook, as in Styelẚcçla lẚghtẚI leads us to establish a new genus to accommodate both these two species.
 Within the family, eamẚctyelẚcçla gen. nov. appears closer to Ascẚdẚcçla than to Styelẚcçla as both genera share the following character states: the first endopodal segment of the antenna bears a seta, the maxilliped is armed with multiple setae, and the inner spine on the first endopodal segment is present at least in leg 4. The presence of the large conspicuous hook on the exopod of legs 2-4, and the possession of 2-segmented fifth leg are distinctive features separating the new genus from Ascẚdẚcçla.
description: Published as part of Kim, Il-Hoi & Boxshall, Geoff A., 2021, Copepods (Cyclopoida) associated with ascidian hosts: Ascidicolidae, Buproridae, Botryllophilidae, and Enteropsidae, with descriptions of 84 new species, pp. 1-286 in Zootaxa 1 on page 24, DOI: 10.11646/zootaxa.4978.1.1, http://zenodo.org/record/4820443
AN EVALUATION OF FEDERAL CONTRACT SET-ASIDE GOALS IN REDUCING SOCIOECONOMIC DISCRIMINATION (GOVERNMENT, CONTRACTING)
Creators: name: Black, Dennis Eugene
Publisher: name: American University
Year: 2023

description: This dissertation evaluates the effectiveness of federal contract set-aside goals in reducing socioeconomic discrimination. Public Law 95-507 mandates that the head of each federal agency, after consultation with the Small Business Administration, establish realistic goals for each fiscal year for the award of agency contract/subcontract dollars to socioeconomically disadvantaged businesses. This requirement currently represents one of approximately 50 separate federal socioeconomic programs that utilize the federal contracting process as the principal implementing mechanism. Implementation of the federal contract goal-setting procedure has created two unintended negative consequences. First, restricting competition for federal contracts to certain socioeconomically disadvantaged groups raises the contract price to the agency. And second, socioeconomic programs have increased administrative costs to both the agency and the contractor without any offsetting benefits to either party. Given agency budget constraints, the two perversities from implementing the goal-setting procedure have effectively increased the agency's cost of contracting and reduced the demand for targeted awards in the federal contracting market. Although a theoretical argument based upon economic efficiency rationale has been raised to justify use of the goal-setting procedure, this research effort identifies nine linked factors that predict its unsuccessful implementation. Through multiple regression analysis, the results reveal that the federal contract goal-setting procedure has not effected a significant increase in federal contract dollars to socioeconomically disadvantaged groups. It appears that the size of an agency's contracting budget is a more important determinant of the level of federal contract dollars going to the targeted groups than the federal contract goal-setting procedure. And it is determined that an agency's goal-setting decision is significantly influenced by its previous year's achievements. Generally, agencies set goals they know they can meet or exceed--a phenomenon referred to as lowballing.
AN EVALUATION OF FEDERAL CONTRACT SET-ASIDE GOALS IN REDUCING SOCIOECONOMIC DISCRIMINATION (GOVERNMENT, CONTRACTING)
Creators: name: Black, Dennis Eugene
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society
classificationCode: 4407
subject: Policy and administration

description: This dissertation evaluates the effectiveness of federal contract set-aside goals in reducing socioeconomic discrimination. Public Law 95-507 mandates that the head of each federal agency, after consultation with the Small Business Administration, establish realistic goals for each fiscal year for the award of agency contract/subcontract dollars to socioeconomically disadvantaged businesses. This requirement currently represents one of approximately 50 separate federal socioeconomic programs that utilize the federal contracting process as the principal implementing mechanism. Implementation of the federal contract goal-setting procedure has created two unintended negative consequences. First, restricting competition for federal contracts to certain socioeconomically disadvantaged groups raises the contract price to the agency. And second, socioeconomic programs have increased administrative costs to both the agency and the contractor without any offsetting benefits to either party. Given agency budget constraints, the two perversities from implementing the goal-setting procedure have effectively increased the agency's cost of contracting and reduced the demand for targeted awards in the federal contracting market. Although a theoretical argument based upon economic efficiency rationale has been raised to justify use of the goal-setting procedure, this research effort identifies nine linked factors that predict its unsuccessful implementation. Through multiple regression analysis, the results reveal that the federal contract goal-setting procedure has not effected a significant increase in federal contract dollars to socioeconomically disadvantaged groups. It appears that the size of an agency's contracting budget is a more important determinant of the level of federal contract dollars going to the targeted groups than the federal contract goal-setting procedure. And it is determined that an agency's goal-setting decision is significantly influenced by its previous year's achievements. Generally, agencies set goals they know they can meet or exceed--a phenomenon referred to as lowballing.
A quantum computing primer for operator theorists
Creators: name: Kribs, David W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 47L90, 47N50, 81P68

description: This is an exposition of some of the aspects of quantum computation and quantum information that have connections with operator theory. After a brief introduction, we discuss quantum algorithms. We outline basic properties of quantum channels, or equivalently, completely positive trace preserving maps. The main theorems for quantum error detection and correction are presented and we conclude with a description of a particular passive method of quantum error correction.
description: 24 pages, to appear in Lin. Alg. Appl
ENHANCING GENERALIZATION OF LEARNED BEHAVIORS FROM SOCIAL SKILLS TRAINING WITH HYPERACTIVE AND CONDUCT-DISORDERED CHILDREN
Creators: name: Bogart, Christopher Michael
Publisher: name: American University
Year: 2023

description: The present study examined the generalization effects of a Social Skills Training program with hyperactive/conduct-disordered children. Previous research has found that a Social Skills Training program consisting of instructions, modeling, rehearsal, and feedback is effective in teaching these children requisite social skills, but fails to produce lasting changes in the natural environment. This study added measures specifically aimed at increasing generalization. Two groups of eight subjects were used. One group received Social Skills Training as described above as well as training in various cognitive behavioral strategies designed to increase interpersonal effectiveness. The second group received the above training as well as training in multiple natural settings, with the use of peers and adults. Both groups showed improvement over time in parent, teacher, staff, and observer ratings of social skill. Further, the group which received generalization programming appeared to exhibit greater improvement over time as demonstrated by parent and teacher ratings. However, this group difference did not reach statistical significance. Neither group demonstrated significant increases in on-unit behavioral observations of their specifically trained skills. Results are discussed with reference to implications for future use of Social Skills Training and suggestions for further research are made.
Quantum-heat fluctuation relations in $3$-level systems under projective measurements
Creators: name: Giachetti, Guido
name: Gherardini, Stefano
name: Trombettoni, Andrea
name: Ruffo, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the statistics of energy fluctuations in a three-level quantum system subject to a sequence of projective quantum measurements. We check that, as expected, the quantum Jarzynski equality holds provided that the initial state is thermal. The latter condition is trivially satisfied for two-level systems, while this is generally no longer true for $N$-level systems, with $N > 2$. Focusing on three-level systems, we discuss the occurrence of a unique energy scale factor $β_{\rm eff}$ that formally plays the role of an effective inverse temperature in the Jarzynski equality. To this aim, we introduce a suitable parametrization of the initial state in terms of a thermal and a non-thermal component. We determine the value of $β_{\rm eff}$ for a large number of measurements and study its dependence on the initial state. Our predictions could be checked experimentally in quantum optics.
description: 12 Pages, 6 Figures. Contribution to the Special Issue "Many Body Quantum Chaos" in honour of Shmuel Fishman, published in the journal "Condensed Matter"
An investigation into Compostable Plastic Bags
Creators: name: Fuerderer, Robert
name: Arif, Ramin
name: Irfon, Benjamin
name: Pickard, Blake
name: Kim, Peter
Publisher: name: The University of British Columbia
Year: 2017

description: UBC has been continuously making improvements to the way that we recycle and reduce our waste around campus. From what started as just a garbage can, you can now find bins all around campus that are segmented as garbage, paper, recyclable containers, and food scraps. This report looks closer at the details of the food scrap bins around campus. Currently, every food scrap bin is lined with a plastic bag which is thrown in the garbage after the contents are emptied. This produces unwanted waste going into the landfill. To minimize this, UBC sustainability committee has considered a bin washer to eliminate the need for a bag, using a paper bag liner, and using compostable plastic bags while making changes to the UBC composting facility to be capable of composting compostable plastic. This report looks at many questions about the proposed changes. Does the use and disposal of compostable bags for food scraps have less environmental impact than using plastic bags and then throwing them out? What would the impacts be of switching from one system to another, or simply not lining composting bins altogether? Are people more likely to compost with or without bags? We look at the life cycle impacts of several food scrap bags (including plastic, paper, and compostable), with a focus on life cycle GHG emissions. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Detecting order and chaos in Hamiltonian systems by the SALI method
Creators: name: Skokos, Ch
name: Antonopoulos, Ch
name: Bountis, T C
name: Vrahatis, M N
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the Smaller Alignment Index (SALI) to distinguish rapidly and with certainty between ordered and chaotic motion in Hamiltonian flows. This distinction is based on the different behavior of the SALI for the two cases: the index fluctuates around non--zero values for ordered orbits, while it tends rapidly to zero for chaotic orbits. We present a detailed study of SALI's behavior for chaotic orbits and show that in this case the SALI exponentially converges to zero, following a time rate depending on the difference of the two largest Lyapunov exponents $σ_1$, $σ_2$ i.e. $SALI \propto e^{-(σ_1-σ_2)t}$. Exploiting the advantages of the SALI method, we demonstrate how one can rapidly identify even tiny regions of order or chaos in the phase space of Hamiltonian systems of 2 and 3 degrees of freedom.
description: 18 pages, 10 figures, accepted for publication in J. Phys. A
A etapa que se segue. Revista da SPA indexada na plataforma Scielo
Creators: name: Granja, Cristina
Publisher: name: Revista da Sociedade Portuguesa de Anestesiologia
Year: 2022

description: x
description: Revista da Sociedade Portuguesa de Anestesiologia, Vol. 30 N.º 4 (2021): Revista da Sociedade Portuguesa de Anestesiologia
title: A combined PSK/ASK transmission system for commercial telephony via satellite
Creators: name: Colby, Roger J
Publisher: name: The Open University
Year: 1984

description: This study addresses three modulation schemes capable of increasing the voice channel capacity of the INTELSAT TDMA/DSI System operating with INTELSAT V spacecraft. In particular, a combination digital Amplitude-Shift Keying/Phase-Shifting Keying (APK) technique is evaluated with respect to signal design, thermal noise performance, bandwidths limitations, co-channel interference, adjacent channel interference, TWT distortion and modem complexity in an INTELSAT TDMA system environment. In a linear channel some APK signal designs are known to require significantly less average SNR than PSK to achieve the same probability of symbol error. However, when operated through a satellite channel containing at least one TWT, the reduction in average power required to accommodate amplitude variations causes APK performance to fall below that of PSK for the same alphabet size. Signal predistortion and/or TWT linearization can eliminate the effect of TWT distortion and restore the performance advantage, although the overall performance of APK is still inferior to PSK. However, in a heavily interference limited environment, such as INTELSAT V, the lower average power requirements caused an APK system to perform better, in some cases considerably better, than the corresponding PSK case. Modem implementation considerations include how the signal set can be generated, the type and method of predistortion compensation, the detection method and the equipment required for the reconstruction of phase and amplitude references. The evaluation techniques of APK described include mathematical models, computer simulations (including the development of a unified error performance expression) and logical extrapolation from the QPSK case. Finally, a simple 8 level APK hardware modem was constructed and evaluated. It is concluded that an APK system may be of advantage as a retrofit in the INTELSAT TDMA system operating at 6/4 GHz, but be of significant advantage at 14/11 Ghz where the higher signal/noise ratios can yield an increase in capacity of up to 50 percent.
Inhomogeneous Gravity
Creators: name: Clifton, T.
name: Mota, D. F.
name: Barrow, J. D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the inhomogeneous cosmological evolution of the Newtonian gravitational 'constant' G in the framework of scalar-tensor theories. We investigate the differences that arise between the evolution of G in the background universes and in local inhomogeneities that have separated out from the global expansion. Exact inhomogeneous solutions are found which describe the effects of masses embedded in an expanding FRW Brans-Dicke universe. These are used to discuss possible spatial variations of G in different regions. We develop the technique of matching different scalar-tensor cosmologies of different spatial curvature at a boundary. This provides a model for the linear and non-linear evolution of spherical overdensities and inhomogeneities in G. This allows us to compare the evolution of G and \dot{G} that occurs inside a collapsing overdense cluster with that in the background universe. We develop a simple virialisation criterion and apply the method to a realistic lambda-CDM cosmology containing spherical overdensities. Typically, far slower evolution of \dot{G} will be found in the bound virialised cluster than in the cosmological background. We consider the behaviour that occurs in Brans-Dicke theory and in some other representative scalar-tensor theories.
description: 15 pages, 15 figures. Submitted to MNRAS. References added
Performance of Julia for High Energy Physics Analyses
Creators: name: Stanitzki, Marcel
name: Strube, Jan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We argue that the Julia programming language is a compelling alternative to implementations in Python and C++ for common data analysis workflows in high energy physics. We compare the speed of implementations of different workflows in Julia with those in Python and C++. Our studies show that the Julia implementations are competitive for tasks that are dominated by computational load rather than data access. For work that is dominated by data access, we demonstrate an application with concurrent file reading and parallel data processing.
description: 16 pages, 4 pages, 1 table, 3 code listings
Length enumeration of fully commutative elements in finite and affine Coxeter groups
Creators: name: Biagioli, Riccardo
name: Bousquet-Mélou, Mireille
name: Jouhet, Frédéric
name: Nadeau, Philippe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: An element w of a Coxeter group W is said to be fully commutative, if any reduced expression of w can be obtained from any other by transposing adjacent pairs of generators. These elements were described in 1996 by Stembridge in the case of finite irreducible groups, and more recently by Biagioli, Jouhet and Nadeau (BJN) in the affine cases. We focus here on the length enumeration of these elements. Using a recursive description, BJN established for the associated generating functions systems of non-linear q-equations. Here, we show that an alternative recursive description leads to explicit expressions for these generating functions.
description: 37 pages, 7 figures
Mean Entropies
Creators: name: Lavenda, B. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Entropies must correspond to mean values for them to be measurable. The Shannon entropy corresponds to the weighted arithmetic mean, whereas the Renyi entropy corresponds to the exponential mean. These means refer to code lengths, which are converted into entropies by replacing the length of a sequence by the negative logarithm of the probability of its occurrence. Only affine and exponential generating functions of means preserve the property of additivity and invariance under translations, and hence are Kolmogorov-Nagumo functions, resulting in the Shannon and Renyi entropies, respectively. Pseudo-additive entropies are generating functions of means of order 0\leτ<1, which is the exponential Renyi entropy, or, in the τ=0 limit, the Shannon entropy. Means of any order cannot be expressed as escort averages because such averages contradict the fact that the means are monotonically increasing functions of their order. Exponential mean error functions of Renyi, in general, and Shannon, in particular, are shown to be measures of the extent of a distribution.
Development of an electronic resource (e-portfolio) used to support trainee teachers in providing outstanding evidence in pursuit of Qualified Teacher Status (QTS)
Creators: name: Wooff, David
name: Irving-Bell, Dawne
name: Hughes, Christopher
Publisher: name: figshare
Year: 2021
Subjects: subject: Education
subject: 130106 Secondary Education
subject: FOS: Educational sciences
subject: 130105 Primary Education (excl. Maori)

description: The poster illustrates how senior lecturers working within Design and Technology teacher training at Edge Hill University are utilising an online electronic portfolio to support trainees in the production of high quality evidence necessary to demonstrate their competence against the standards relating to achieving Qualified Teacher Status (QTS).
ENHANCING GENERALIZATION OF LEARNED BEHAVIORS FROM SOCIAL SKILLS TRAINING WITH HYPERACTIVE AND CONDUCT-DISORDERED CHILDREN
Creators: name: Bogart, Christopher Michael
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 5203
subject: Clinical and health psychology

description: The present study examined the generalization effects of a Social Skills Training program with hyperactive/conduct-disordered children. Previous research has found that a Social Skills Training program consisting of instructions, modeling, rehearsal, and feedback is effective in teaching these children requisite social skills, but fails to produce lasting changes in the natural environment. This study added measures specifically aimed at increasing generalization. Two groups of eight subjects were used. One group received Social Skills Training as described above as well as training in various cognitive behavioral strategies designed to increase interpersonal effectiveness. The second group received the above training as well as training in multiple natural settings, with the use of peers and adults. Both groups showed improvement over time in parent, teacher, staff, and observer ratings of social skill. Further, the group which received generalization programming appeared to exhibit greater improvement over time as demonstrated by parent and teacher ratings. However, this group difference did not reach statistical significance. Neither group demonstrated significant increases in on-unit behavioral observations of their specifically trained skills. Results are discussed with reference to implications for future use of Social Skills Training and suggestions for further research are made.
Quantum Mechanical Ground State of Hydrogen Obtained from Classical Electrodynamics
Creators: name: Cole, Daniel C.
name: Zou, Yi
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The behavior of a classical charged point particle under the influence of only a Coulombic binding potential and classical electromagnetic zero-point radiation, is shown to yield agreement with the probability density distribution of Schroedinger's wave equation for the ground state of hydrogen. These results, obtained without any fitting parameters, again raise the possibility that the main tenets of stochastic electrodynamics (SED) are correct, thereby potentially providing a more fundamental basis of quantum mechanics. The present methods should help propel yet deeper investigations into SED.
description: TeX file plus five figures [1, 2(a,b,c,d)]
Additional file 1 of Fast tree aggregation for consensus hierarchical clustering
Creators: name: Hulot, Audrey
name: Chiquet, Julien
name: Jaffrézic, Florence
name: Rigaill, Guillem
Publisher: name: figshare
Year: 2020
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1 Proof of time complexity of the mergeTrees procedure.
THE PISCATAWAY INDIANS OF SOUTHERN MARYLAND: AN ETHNOHISTORY FROM PRE-EUROPEAN CONTACT TO THE PRESENT (LATE WOODLAND, CHESAPEAKE BAY, ALGONQUIAN)
Creators: name: Cissna, Paul Byron
Publisher: name: American University
Year: 2023

description: At European contact in 1608, the Algonquian-speaking Piscataway chiefdom was dominant on the Western Shore of Maryland. This dissertation presents their ethnohistory from pre-European contact to the present. There are a number of research goals. Two are considered major: first, to determine the origin of the myth that the Indian "disappeared" from the area; and second, to determine why the Piscataway came to be viewed as non-Indians. The methodology demanded both fieldwork and the analysis of numerous source materials: archaeological, linguistic, ethnographic, historical/archival, and contemporary. The archaeological Potomac Creek Complex dates to about 1300 A.D. and includes the Piscataway and the Virginia Patawomeke. Relations with Virginia pre-dated and influenced those with Maryland, settled in 1634. Early Maryland relations were basically cordial, with some conflict and subtle struggle for dominance. Relations later deteriorated. About 1700 A.D., some Piscataway left the Colony; others did not. Colonial policy in the late 1600s effectively removed the Piscataway from later records: influential whites living near Indian communities acted as intermediaries in Indian/English disputes. The colonial concept of "mulatto" included people of mixed Indian parentage. Combined with anti-miscegenation laws, these factors led to the belief that the Piscataway had left the Colony and that those who remained were not Indian. Nevertheless, the records reveal that the Piscataway continued to be viewed as a unique population. Individual racial classifications were frequently contradictory. The nineteenth century saw an increased use of terms such as "free person of color." Marriage records reveal a high rate of endogamy. This has decreased in recent years. The Piscataway "re-emerged" in the 1800s. This research shows that they have a strong matrilineal focus and community organization. Extant roles correspond to clan mother and chief. Use of the white intermediary in external conflicts continued until recent years. A number of Piscataway, presently divided into three factions, are engaged in a revitalization movement, vocally asserting Indian identity. Their struggle for recognition as Indians is succeeding, with many people moving into their once rural area. The Piscataway must now maintain their group identity in the face of increased suburbanization.
Triangle singularity in the $B^-\to K^-π^0X(3872)$ reaction and sensitivity to the $X(3872)$ mass
Creators: name: Sakai, Shuntaro
name: Oset, Eulogio
name: Guo, Feng-Kun
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have done a study of the $B^- \to K^- π^0 X(3872)$ reaction by means of a triangle mechanism via the chain of reactions: $B^- \to K^- D^{*0}\bar D^{*0}$; $D^{*0} \to π^0 D^0$; $D^0\bar D^{*0}\to X(3872)$. We show that this mechanism generates a triangle singularity in the $π^0 X(3872)$ invariant mass for a very narrow window of the $X(3872)$ mass, around the present measured values, and show that the peak positions and the shape of the mass distributions are sensitive to the $X(3872)$ mass, such that a measurement of the reaction can serve to improve on the present values of this mass. In particular, we point out that the $X(3872)$ mass relative to the $D^0\bar D^{*0}$ threshold may be extracted from the asymmetry of the $π^0X$ line shape.
description: 22 pages, 10 figures
THE PISCATAWAY INDIANS OF SOUTHERN MARYLAND: AN ETHNOHISTORY FROM PRE-EUROPEAN CONTACT TO THE PRESENT (LATE WOODLAND, CHESAPEAKE BAY, ALGONQUIAN)
Creators: name: Cissna, Paul Byron
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society
classificationCode: 4401
subject: Anthropology
subject: FOS: Sociology

description: At European contact in 1608, the Algonquian-speaking Piscataway chiefdom was dominant on the Western Shore of Maryland. This dissertation presents their ethnohistory from pre-European contact to the present. There are a number of research goals. Two are considered major: first, to determine the origin of the myth that the Indian "disappeared" from the area; and second, to determine why the Piscataway came to be viewed as non-Indians. The methodology demanded both fieldwork and the analysis of numerous source materials: archaeological, linguistic, ethnographic, historical/archival, and contemporary. The archaeological Potomac Creek Complex dates to about 1300 A.D. and includes the Piscataway and the Virginia Patawomeke. Relations with Virginia pre-dated and influenced those with Maryland, settled in 1634. Early Maryland relations were basically cordial, with some conflict and subtle struggle for dominance. Relations later deteriorated. About 1700 A.D., some Piscataway left the Colony; others did not. Colonial policy in the late 1600s effectively removed the Piscataway from later records: influential whites living near Indian communities acted as intermediaries in Indian/English disputes. The colonial concept of "mulatto" included people of mixed Indian parentage. Combined with anti-miscegenation laws, these factors led to the belief that the Piscataway had left the Colony and that those who remained were not Indian. Nevertheless, the records reveal that the Piscataway continued to be viewed as a unique population. Individual racial classifications were frequently contradictory. The nineteenth century saw an increased use of terms such as "free person of color." Marriage records reveal a high rate of endogamy. This has decreased in recent years. The Piscataway "re-emerged" in the 1800s. This research shows that they have a strong matrilineal focus and community organization. Extant roles correspond to clan mother and chief. Use of the white intermediary in external conflicts continued until recent years. A number of Piscataway, presently divided into three factions, are engaged in a revitalization movement, vocally asserting Indian identity. Their struggle for recognition as Indians is succeeding, with many people moving into their once rural area. The Piscataway must now maintain their group identity in the face of increased suburbanization.
An Efficiently Generated Family of Binary de Bruijn Sequences
Creators: name: Zhu, Yunlong
name: Chang, Zuling
name: Ezerman, Martianus Frederic
name: Wang, Qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study how to generate binary de Bruijn sequences efficiently from the class of simple linear feedback shift registers with feedback function $f(x_0, x_1, \ldots, x_{n-1}) = x_0 + x_1 + x_{n-1}$ for $n \geq 3$, using the cycle joining method. Based on the properties of this class of LFSRs, we propose two new generic successor rules, each of which produces at least $2^{n-3}$ de Bruijn sequences. These two classes build upon a framework proposed by Gabric, Sawada, Williams and Wong in Discrete Mathematics vol. 341, no. 11, pp. 2977--2987, November 2018. Here we introduce new useful choices for the uniquely determined state in each cycle to devise valid successor rules. These choices significantly increase the number of de Bruijn sequences that can be generated. In each class, the next bit costs $O(n)$ time and $O(n)$ space for a fixed $n$.
description: A basic implementation in C is included