cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gordon and Kerr-Schild ansatze in massive and bimetric gravity
Creators: name: Baccetti, Valentina
name: Martin-Moruno, Prado
name: Visser, Matt
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop the "generalized Gordon ansatz" for the ghost-free versions of both massive and bimetric gravity, an ansatz which is general enough to include almost all spacetimes commonly considered to be physically interesting, and restricted enough to greatly simplify calculations. The ansatz allows explicit calculation of the matrix square root gamma = sqrt{g^{-1} f} appearing as a central feature of the ghost-free analysis. In particular, this ansatz automatically allows us to write the effective stress-energy tensor as that corresponding to a perfect fluid. A qualitatively similar "generalized Kerr-Schild ansatz" can also be easily considered, now leading to an effective stress-energy tensor that corresponds to a null fluid. Cosmological implications are considered, as are consequences for black hole physics. Finally we have a few words to say concerning the null energy condition in the framework provided by these ansatze.
description: 22 pages
Northeastern Asian-Northwest America microblade tradition: and the Ice Mountain microblade and core industry
Creators: name: Smith, Jason Wallace
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: GN 498 B78 S53 1974
subject: Arrowheads
subject: Projectile points

description: Bibliography: p. 153-173.
description: This thesis deals primarily with two archaeological problems: first, the technological and typological nature of the Ice Mountain microblade and core industry and its relationships with other similar industries in Northwest North America and Northeast Asia; and second, the technological-typological, temporal-spatial character of one particular and distinctive trans-Beringian industrial tradition. Specifically, it is proposed that there existed in Upper Palaeolithic and post-Pleistocene times a lithic industrial tradition which is identified by the title "Northeast Asian-Northwest American Microblade Tradition," and abbreviated as NANAMT. It is further proposed that peoples carrying that tradition had arrived in northern British Columbia by approximately 9,000-8,000 years ago, leaving behind remnants of their subsistence activity in the form of the Ice Mountain microblade and core industry. A demonstration of this proposal is set out based upon comparisons of the Ice Mountain material with other specimens and microblade industries known from Northwest North America and Northeast Asia. These comparisons are based, in part, upon the morpho-typology exhibited by the diagnostic features of such industries--the form of the cores from which micro blades were i;·e.moved. In larg.er part, emphasis is placed upon the unity exhibited in the manufacturing patterns, and a techno-typology is established which organizes the primary features of these patterns into manipulative categories.
Messung des Geschwindigkeitsfeldes vor und hinter einem Modell-Propeller (stationär und instationär) mit einem Laser-Anemometer
Creators: name: Lammers, Gerd
Publisher: name: TUHH Universitätsbibliothek
Year: 1975
Subjects: classificationCode: 530
subject: Physik
classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Messung des Geschwindigkeitsfeldes vor und hinter einem Modell-Propeller (stationär und instationär) mit einem Laser-Anemometer
Porcupine quillwork of the Central and Northern Plains Indians
Creators: name: Bebbington, Julia Maria
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: E 98 G73 B42 1979 Microfiche
subject: Indians of North America - Industries
subject: Porcupine quillwork
subject: Indians of North America - Art

description: Bibliography: p. 87-92.
description: Porcupine quillwork of the central and northern Plains Indians is the focus of the present study. Collections abound with examples of this decorative technique, yet a survey of the related literature reveals a paucity of publications specifically on this aspect of material culture. This thesis is an attempt to fill part of this void. The archaeological, historical and contemporary status of quillwork is examined. Its technical, social and religious nature is discussed, as well as design. In addition to this, the decline of quillwork upon the arrival of the glass trade bead is outlined. These many facets of the craft are explored in order that a total picture is seen, for quillwork is an expression of the people, time and environment that played an integral part in its creation. It is my goal, that as a study of material culture, the relevance of this thesis may be felt by the museum world and, to a lesser degree, by modern anthropology. For the former, it serves to identify Plains quillwork, the specific techniques used and standardizes the terminology used to describe quillworking techniques. To the latter, it is illustrative of concepts such as acculturation and it uncovers areas where more research is needed.
Multilevel extended algorithms in structural dynamics on parallel computers
Creators: name: Elssel, Kolja
name: Voß, Heinrich
Publisher: name: TUHH Universitätsbibliothek
Year: 2003
Subjects: classificationCode: 510
subject: Mathematik
subject: Mulit-level-Verfahren
subject: Parallelisierung
subject: Eigenwertproblem
classificationCode: 65F15
subject: Eigenvalues, eigenvectors

description: A parallelization concept for the adaptive multi-level substructuring (AMLS) method is presented, the idea of which is to hierarchically substructure the system under consideration, and at the same time to use a truncated eigenvalue decomposition on the interfaces to reduce the excessive number of interface degrees of freedom in component mode methods.
Ozette prehistory - prelude
Creators: name: McKenzie, Kathleen H.
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: E 99 W16 M153 1974 Microfiche
subject: Wakashan Indians - Antiquities
subject: Indians of North America - Washington (State) - Antiquities
subject: Ozette Village Site - Washington (State)

description: Bibliography: p. 148-151.
description: Controlled archaeological and stratigraphic information from an excavation at Ozette Indian Village site on the Olympic Coast of lfashington, provided evidence establishing a local stratigraphic sequence of ten superimposed units of which three and possibly four represent sedimentation involving house-floors. The time period encompassed by the sequence, although not determined, covered an interval dating back from historic time. Material culture recovered throughout the stratigraphic sequence was, with few exceptions comparable with ethnographic forms and had not undergone significant morphological change. It clearly reflected the maritime economy pursued by the historic Ozette people whose pattern of life placed great emphasis upon marine halibut fishing and the pelagic hunting of sea mammals.
A Paleoecological model for northwest coast prehistory
Creators: name: Fladmark, Knut R.
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: F 5816 F52 1974 Microfiche
subject: British Columbia - Antiquities
subject: Indians of North America - British Columbia - Antiquities
subject: Indians of North America - British Columbia

description: Bibliography: p. 299-319.
description: The evolution of the Northwest Coast cultural pattern is discussed in terms of changing energy availability through periods of environmental instability and quasi-stability. Evidence is presented for the simultaneous occurrenc e of two different archaeolo gica l traditions along the Northwest Coast between about 10,000 and 5,000 B.P. The first is characterized by a blade-andcore technology and de-emphasis of bifacial flaking. Site areas are associated with raised beaches and distributed along the whole coast north of central Queen Charlotte Sound . To the south, particularly on the lower Fraser and Columbia Rivers there occurs contemporaneously an entirely different tradition characterized by large leaf-shaped bifaces and a lack of a true blade-and-core technology. The distributional break between the two traditions corresponds precisely with the zero-isobar separating sea-level s significantly higher than present north of central Queen Charlotte Sound, and sea-levels significantly lower to the south. It is suggested that this correlation reflects the divergent effects of higher and lower sea-levels on the coastal environment and corresponding divergence of cultural adaptive strategies. The blade-and-core tradition probably represents a long-standing cultural adaptation to the inter-tidal and general marine resources of the sub-arctic Pacific region, with the southern tradition more heavily based on riverine and terrestrial resources. The rapid efflorescence of large semi-permanent settlements, art and wealth objects, and other features typical of ethnographic coastal cultures, 5,000 B.P. correlates with the stabilization of sea-level at about the present position along most of the coast at this time. It is suggested that gradient maturation of the river systems following coastline stabilization allowed the establishment of the massive and dependable salmon runs on which the dense and semi-sedentary populations of the ethnographic Northwest Coast were based.
Magnetic order and spin dynamics in the proximity of a ferromagnetic quantum critical point: A μSR study of YbNi4P2
Creators: name: Spehling, J.
name: Günther, M.
name: Krellner, C.
name: Yèche, N.
name: Luetkens, H.
name: Baines, C.
name: Geibel, C.
name: Klauss, H. -H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The local 4f-electronic spin dynamics and magnetic order in YbNi4P2 were studied by means of muon-spin relaxation measurements. Zero-field muon-spin relaxation proves static magnetic order with a strongly reduced ordered Yb3+ moment of (2.5-4.6) \times 10-2μB, below TC = 140 mK. Above TC, the muon-spin polarization P(t,B) is dominated by quasihomogeneous spin fluctuations and exhibits a time-field scaling relation P(t,B) = P(t/Bγ), indicating cooperative critical spin dynamics in the system. At T = 190 mK, slightly above TC, γ = 0.81(5), suggesting time-scale invariant power-law behavior for the dynamic electronic spin-spin autocorrelation function.
description: 5 pages, 4 figures
IDCS J1426.5+3508: Sunyaev-Zel'dovich Measurement of a Massive IR-selected Cluster at z=1.75
Creators: name: Brodwin, M.
name: Gonzalez, A. H.
name: Stanford, S. A.
name: Plagge, T.
name: Marrone, D. P.
name: Carlstrom, J. E.
name: Dey, A.
name: Eisenhardt, P. R.
name: Fedeli, C.
name: Gettings, D.
name: Jannuzi, B. T.
name: Joy, M.
name: Leitch, E. M.
name: Mancone, C.
name: Snyder, G. F.
name: Stern, D.
name: Zeimann, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report 31 GHz CARMA observations of IDCS J1426.5+3508, an infrared-selected galaxy cluster at z = 1.75. A Sunyaev-Zel'dovich decrement is detected towards this cluster, indicating a total mass of M200 = (4.3 +/- 1.1) x 10^{14} Msun in agreement with the approximate X-ray mass of ~5 x 10^{14} Msun. IDCS J1426.5+3508 is by far the most distant cluster yet detected via the Sunyaev-Zel'dovich effect, and the most massive z >= 1.4 galaxy cluster found to date. Despite the mere ~1% probability of finding it in the 8.82 deg^2 IRAC Distant Cluster Survey, IDCS J1426.5+3508 is not completely unexpected in LCDM once the area of large, existing surveys is considered. IDCS J1426.5+3508 is, however, among the rarest, most extreme clusters ever discovered, and indeed is an evolutionary precursor to the most massive known clusters at all redshifts. We discuss how imminent, highly sensitive Sunyaev-Zel'dovich experiments will complement infrared techniques for statistical studies of the formation of the most massive galaxy clusters in the z > 1.5 Universe, including potential precursors to IDCS J1426.5+3508.
description: 9 pages, 4 figures, Accepted to the Astrophysical Journal
Interpreting f0(600) and a0(980) as \bar q - q states from an Nf=3 Sigma Model with (Axial-)Vectors
Creators: name: Parganlija, Denis
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We address the question whether it is possible to interpret the low-lying scalar mesons f0(600) and a0(980) as \bar q - q states within a U(3)xU(3) Linear Sigma Model containing vector and axial-vector degrees of freedom.
description: Prepared for the Proceedings of the Nordic Conference on Nuclear Physics, Stockholm, 13-17 June 2011. 4 pages
Analytical approaches to György Kurtág's "Three Old Inscriptions for Voice and Piano" Op. 25
Creators: name: Leung, Prudence Pui Sze
Publisher: name: University of British Columbia
Year: 2009

description: György Kurtág is one of the most influential composers alive today. His music conveys a strong sense of Hungarian culture, but draws influences from many composers and eras. His compositions range from miniature solo pieces to large orchestral compositions (Stele, Op. 33), and from the twelve-tone idiom (String Quartet No. i, op.’) to electroacoustic works (Mémoire de Lalka). His best-known pieces are mostly vocal works, which demonstrate a rare brilliance in utilizing music to heighten poetic content. The Three Old Inscriptions, Op. 25, for voice and piano, is a work that has not yet received close attention from music theorists. Although more compact than some of his other vocal pieces, this work manifests many characteristic features of Kurtág’ s compositional approach and technique. It is an excellent example of how he incorporates traditional and past compositional elements in a contemporary idiom to develop a unique contemporary compositional style. This thesis is divided into three chapters. Chapter one provides background on Kurtág’s compositional style and influences, a brief introduction to The Three Old Inscriptions, and a synopsis of the three pieces. Chapter two contains a section-by-section musical analysis of the third movement. Chapter three discusses compositional techniques that are not treated in chapter two, and examines the relationship between the music and the text in the third movement. Collectively, chapters two and three also address the integration of elements from the past and present in Op. 25.
C1-stably shadowable conservative diffeomorphisms are Anosov
Creators: name: Bessa, Mario
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this short note we prove that if a symplectomorphism f is C1-stably shadowable, then f is Anosov. The same result is obtained for volume-preserving diffeomorphisms.
description: 4 pages
title: Influence of the microstructure on the creep behaviour of semi-solid processed magnesium-zinc alloys
title: Einfluss der Mikrostruktur auf das Kriechverhalten von semi-solid-gegossenen Magnesium-Zinc-Legierungen
titleType: AlternativeTitle
Creators: name: Morales Garza, Emma Deyanira
Publisher: name: TUHH Universitätsbibliothek
Year: 2013
Subjects: subject: Thixocast
subject: Magnesiumlegierungen
subject: Kriechmechanismus
subject: Gefüge
subject: thixocast
subject: magnesium alloys
subject: creep mechanisms
subject: microstructure
classificationCode: 51.10
subject: Metallphysik
subject: Mechanische Eigenschaft
subject: Seltenerdmetall

description: Die Kriecheigenschaften von zwei Magnesium-Zink-Legierungen, bezeichnet mit MEZ (Mg-2.6wt%RE-0.4Zn-0.13Mn-0.12Zr) und ZECa (Mg-2.8Zn-1.9Ca-0.32RE-0.08Sr), wurden im thixo-gegossenen Zustand im Temperaturbereich von 135 to 200°C untersucht. Die beiden Legierungen zeigten nach 100 h bei 175°C und 80 MPa weniger Kriechen als die Standardlegierung AE42. Die Verbesserung der Kriecheigenschaften wurde auf die bimodale Korngrößenverteilung nach dem Thixo-Guss und auf die Gussqualität zurückgeführt.
description: The creep properties of two magnesium-zinc alloys, designated as MEZ (Mg-2.6wt%RE-0.4Zn-0.13Mn-0.12Zr) and ZECa (Mg-2.8Zn-1.9Ca-0.32RE-0.08Sr), have been studied in the thixocast state at temperatures of 135 to 200°C. The two alloys showed less creep than the state of the art AE42 alloy after 100 h of creep exposure up to 175°C and 80 MPa. The improvement on the creep resistance has been related to the bimodal microstructure obtained after thixocasting and to the quality of the castings.
Mennonites in unexpected places : an authentic tradition and a burdensome past
Creators: name: Nobbs-Thiessen, Benjamin
Publisher: name: University of British Columbia
Year: 2009

description: This paper explores a post-Second World War environment in which North American Mennonite scholars expressed increasing interest, sympathy and concern for Mennonite colonists in Latin America. It also speaks to broader attempts that complicate the relationship between tradition and modernity and addresses the nature of diasporic affiliation amongst a transnational religious community. In particular, I focus on Joseph Winfield Fretz’s writings on Paraguayan Mennonites living in the Gran Chaco as well as articles published in the periodical Mennonite Life. These works came at a time of social, cultural and religious change for North American Mennonite communities when issues of secularization, urbanization and evangelicalism were of increasing import. Faced with these challenges, Mennonite colonies in Latin America provided academics with an “outside space” for critical reflection as well as a nostalgic return to an authentic agrarian lifestyle lacking in North American life. Sociologists such as Fretz were uniquely positioned to act as cultural brokers, imparting these vital experiences to North American audiences through periodicals like Mennonite Life. However, their romantic appraisals of colony life occasionally ran aground against the profound differences between themselves and colonists. This revealed the degree to which they were invested in, and even committed to, the changes underway in North American society. Scholars attempted to mediate these differences by insisting upon historical continuity and focusing on external difference but when these attempts failed their tone turned condescending. This was particularly apparent in discussions of religion during a time in which the North American churches were increasingly embracing evangelicalism. It was then the position of colonists and not North Americans that was defined in terms of lack. The ambivalent nature of this identification is what this paper seeks to capture, a relationship that was equally intimate and distant and in which colonists appeared as both pilgrims and strangers.
Influence of $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ Gravity on Cylindrical Collapse
Creators: name: Sharif, M.
name: Naseer, Tayyab
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This article examines the dynamics of gravitational collapse in $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ gravity, where $\mathcal{Q}=\mathcal{R}_{\mathrm{ab}}\mathcal{T}^{\mathrm{ab}}$. We consider self-gravitating anisotropic cylindrical geometry whose interior is filled with dissipative matter configuration and match it with exterior cylindrically symmetric spacetime at the hypersurface through junction conditions. We employ the Misner-Sharp and Müler-Israel Stewart formalisms to derive the dynamical as well as transport equations corresponding to the model $\mathcal{R}+Φ\sqrt{\mathcal{T}}+Ψ\mathcal{Q}$, where $Φ$ and $Ψ$ are arbitrary coupling constants. We then establish some relations between these equations through which the impact of effective matter variables, heat dissipation and the bulk viscosity on the collapse rate is studied. Further, we express the Weyl scalar in terms of the effective matter sector. We also obtain the conformal flatness by applying some restrictions on the considered model and taking dust configuration into the account. Finally, we investigate various cases to check whether the modified corrections increase or decrease the collapse rate.
description: 23 pages, no figure
Untersuchungen über die Sicherheit lecker Schiffe
Creators: name: Bakenhus, Johannes
Publisher: name: TUHH Universitätsbibliothek
Year: 1964
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Untersuchungen über die Sicherheit lecker Schiffe
THE IMPORTANCE OF VR/AR IN CHILDREN'S EDUCATION
Creators: name: Irmatova, Dilyora
Publisher: name: Zenodo
Year: 2023

description: Interest in technology is well founded: scientists believe that the digitalization of education will make it possible to simplify the presentation of complex material, facilitate the memorization process and motivate children to study harder. And these are not empty guesses, but arguments supported by the results of the first scientific research, as well as the practice of foreign educational programs.
Dogmatism as related to the quality of the co-therapists' relationship
Creators: name: Johnson, Judy L.
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: BF 323 D6 J63 1979 Fiche
subject: Dogmatism - Testing
subject: Group psychotherapy
subject: Psychotherapists
subject: Interpersonal relations

description: Bibliography: p. 75-81.
Detection of pulsar beams deflected by the black hole in Sgr A*: effects of black hole spin
Creators: name: Nampalliwar, Sourabh
name: Price, Richard H.
name: Creighton, Teviet
name: Jenet, Fredrick A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Some Galactic models predict a significant population of radio pulsars close to the our galactic center. Beams from these pulsars could get strongly deflected by the supermassive black hole (SMBH) believed to reside at the galactic center and reach the Earth. Earlier work assuming a Schwarzschild SMBH gave marginal chances of observing this exotic phenomenon with current telescopes and good chances with future telescopes. Here we calculate the odds of observability for a rotating SMBH. We find that the estimates of observation are not affected by the SMBH spin, but a pulsar timing analysis of deflected pulses might be able to provide an estimate of the spin of the central black hole.
description: 15 pages aastex, 8 Figs
Late quaternary geology of the Upper Elk Valley, British Columbia
Creators: name: Ferguson, Angus J.
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: QE 697 F45 1978 Microfiche
subject: Geology, Stratigraphic - Quaternary
subject: Geology - British Columbia - Upper Elk Valley

description: Bibliography: p. 101-108.
Direct imaging constraints on planet populations detected by microlensing
Creators: name: Quanz, Sascha P.
name: Lafreniere, David
name: Meyer, Michael R.
name: Reggiani, Maddalena M.
name: Buenzli, Esther
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Results from gravitational microlensing suggested the existence of a large population of free-floating planetary mass objects. The main conclusion from this work was partly based on constraints from a direct imaging survey. This survey determined upper limits for the frequency of stars that harbor giant exoplanets at large orbital separations. Aims. We want to verify to what extent upper limits from direct imaging do indeed constrain the microlensing results. We examine the current derivation of the upper limits used in the microlensing study and re-analyze the data from the corresponding imaging survey. We focus on the mass and semi-major axis ranges that are most relevant in context of the microlensing results. We also consider new results from a recent M-dwarf imaging survey as these objects are typically the host stars for planets detected by microlensing. We find that the upper limits currently applied in context of the microlensing results are probably underestimated. This means that a larger fraction of stars than assumed may harbor gas giant planets at larger orbital separations. Also, the way the upper limit is currently used to estimate the fraction of free-floating objects is not strictly correct. If the planetary surface density of giant planets around M-dwarfs is described as df_Planet ~ a^beta da, we find that beta ~ 0.5 - 0.6 is consistent with results from different observational studies probing semi-major axes between ~0.03 - 30 AU. Having a higher upper limit on the fraction of stars that may have gas giant planets at orbital separations probed by the microlensing data implies that more of the planets detected in the microlensing study are potentially bound to stars rather than free-floating. The current observational data are consistent with a rising planetary surface density for giant exoplanets around M-dwarfs out to ~30 AU.
description: Accepted for publication in A&A as Research Note, 3 pages
An investigation of key issues for improving quality of airport benchmarking : focus on empirical methods
Creators: name: Lin, Zhuo
Publisher: name: University of British Columbia
Year: 2009

description: Significant changes have occurred over the last three decades in the aviation industry. Deregulation of the airline industry has led to increasingly competitive airline markets domestically and internationally. Consequently, views about airports began to change: from that of a public utility to a more business/commercial entity, which lead to the worldwide moves towards corporatization, commercialization, and privatization of airports. However, most airports enjoy a quasi-monopolistic position and may abuse such a position. Airport performance measurement and benchmarking, therefore, has become increasingly important for airlines, investors, regulators, and airport managers to ensure efficient operation of airports. The main objectives of this study are to empirically compare the three key methodologies for measuring airport efficiency, namely the productivity index method, Data Envelopment Analysis (DEA) method, and stochastic frontier method; and to examine the effects of regional price variations on efficiency measures and rankings. The study is based on the data for 62 North American airports which was kindly provided in confidence by the ATRS Global Airport Performance Benchmarking project. The main findings are: (a) the efficiency scores and airport rankings measured by the three alternative methods are quite similar to each others among the top and bottom ranking airports, whereas considerable differences are observed among the airports in the middle; and (b) As expected, regional price level adjustments help improve the accuracy of efficiency measurement, suggesting that whenever possible regionally differentiated price data should be used instead of national aggregate price data.
Late Pleistocene and Holocene cirque glaciations in the Shuswap Highland area, British Columbia
Creators: name: Duford, James Matthew
Publisher: name: University of Calgary
Year: 1976
Subjects: subject: QE 697 D83 1976 Microfiche
subject: Geology, Stratigraphic - Pleistocene
subject: Geology, Stratigraphic - Recent
subject: Glacial epoch - British Columbia - Shuswap Highland area

description: Bibliography: p. 92-98.
title: Die Beeinflussung der Meßabweichung von Feldsonden und Stromzangen durch reale Umgebungsbedingungen
title: The influence of measurement uncertainties of field sensors and current probes under the condition of real environments
titleType: AlternativeTitle
Creators: name: Monien, Georg
Publisher: name: TUHH Universitätsbibliothek
Year: 2003
Subjects: subject: Messabweichung
subject: Messunsicherheit
subject: elektromagnetische Felder
subject: numerische Simulation
subject: Momentenmethode
subject: Antennen
subject: Stromzangen
subject: Measurement error
subject: measurement uncertainty
subject: electromagnetic fields
subject: numerical simulation
subject: method of moments
subject: antennas
subject: current probes
classificationCode: 620
subject: Ingenieurwissenschaften
subject: Messunsicherheit
subject: Elektromagnetisches Feld
subject: Simulation
classificationCode: 06.20.Dk
subject: Measurement and error theory

description: Die Messung elektromagnetischer Felder und hochfrequenter Leitungsströme wird durch eine Vielzahl unterschiedlicher Faktoren beeinflusst und kann zu einer Messabweichung führen, die in Form einer Messunsicherheit nach DIN 1319 Teil des Messergebnisses ist. Systematische Untersuchungen über mögliche Messabweichungen sind messtechnisch wie auch analytisch nur scher durchzuführen und erst in neuerer Zeit auf Basis numerischer Methoden einer Analyse zugänglich. Im Rahmen dieser Arbeit werden Feldsonden und Stromzangen mit Hilfe der Momentenmethode numerisch modelliert. Die resultierende Messabweichung wie auch die Rückwirkung auf die Messumgebung werden dabei in Abhängigkeit vom Sondentyp, der Feldanregung und benachbarter Streustrukturen bestimmt. Es werden Kennwerte für Feldsonden und Stromzangen erarbeitet, mit denen es möglich ist, quantitative Aussagen über die Messabweichung zu machen.
description: The measurement of electromagnetic fields and high-frequency conducted currents is influenced by a great number of factors. This may lead to a measurement error which is part of the measurement result in the form of a measurement uncertainty according to DIN 1319. Systematic investigations of possible measurement errors have been difficult technically as well as analytically. Only lately have analyses been possible on the basis of numerical methods. In this thesis the method of moments is used to model field sensors and current probes numerically. The resulting measurement error as well as the influence on the measurement environment are determined depending in relation to sensor type, field source and close scattering structures. Characteristic values for field sensors and current probes are found which allow the quantitative prediction of measurement errors.
Observations of the December 13 and 14, 2006, Solar Particle Events in the 80 MeV/n - 3 GeV/n range from space with PAMELA detector
Creators: name: Adriani, O.
name: Barbarino, G. C.
name: Bazilevskaya, G. A.
name: Bellotti, R.
name: Boezio, M.
name: Bogomolov, E. A.
name: Bonechi, L.
name: Bongi, M.
name: Bonvicini, V.
name: Borisov, S.
name: Bottai, S.
name: Bruno, A.
name: Cafagna, F.
name: Campana, D.
name: Carbone, R.
name: Carlson, P.
name: Casolino, M.
name: Castellini, G.
name: Consiglio, L.
name: De Pascale, M. P.
name: De Santis, C.
name: De Simone, N.
name: Di Felice, V.
name: Galper, A. M.
name: Grishantseva, L.
name: Gillard, W.
name: Jerse, G.
name: Karelin, A. V.
name: Koldashov, S. V.
name: Krutkov, S. Y.
name: Kvashnin, A. N.
name: Leonov, A.
name: Malakhov, V.
name: Marcelli, L.
name: Mayorov, A. G.
name: Menn, W.
name: Mikhailov, V. V.
name: Mocchiutti, E.
name: Monaco, A.
name: Mori, N.
name: Nikonov, N.
name: Osteria, G.
name: Palma, F.
name: Papini, P.
name: Pearce, M.
name: Picozza, P.
name: Pizzolotto, C.
name: Ricci, M.
name: Ricciarini, S. B.
name: Sarkar, R.
name: Rossetto, L.
name: Simon, M.
name: Sparvoli, R.
name: Spillantini, P.
name: Stozhkov, Y. I.
name: Vacchi, A.
name: Vannuccini, E.
name: Vasilyev, G.
name: Voronov, S. A.
name: Wu, J.
name: Yurkin, Y. T.
name: Zampa, G.
name: Zampa, N.
name: Zverev, V. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the space spectrometer PAMELA observations of proton and helium fluxes during the December 13 and 14, 2006 solar particle events. This is the first direct measurement of the solar energetic particles in space with a single instrument in the energy range from $\sim$ 80 MeV/n up to $\sim$ 3 GeV/n. In the event of December 13 measured energy spectra of solar protons and helium were compared with results obtained by neutron monitors and other detectors. Our measurements show a spectral behaviour different from those derived from the neutron monitor network. No satisfactory analytical fitting was found for the energy spectra. During the first hours of the December 13 event solar energetic particles spectra were close to the exponential form demonstrating rather significant temporal evolution. Solar He with energy up to ~1 GeV/n was recorded on December 13. In the event of December 14 energy of solar protons reached ~600 MeV whereas maximum energy of He was below 100 MeV/n. The spectra were slightly bended in the lower energy range and preserved their form during the second event. Difference in the particle flux appearance and temporal evolution in these two events may argue for a special conditions leading to acceleration of solar particles up to relativistic energies.
description: Accepted for publication on Astrophysical journal
Simulating radiative shocks in nozzle shock tubes
Creators: name: van der Holst, B.
name: Toth, G.
name: Sokolov, I. V.
name: Daldorff, L. K. S.
name: Powell, K. G.
name: Drake, R. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We use the recently developed Center for Radiative Shock Hydrodynamics (CRASH) code to numerically simulate laser-driven radiative shock experiments. These shocks are launched by an ablated beryllium disk and are driven down xenon-filled plastic tubes. The simulations are initialized by the two-dimensional version of the Lagrangian Hyades code which is used to evaluate the laser energy deposition during the first 1.1ns. The later times are calculated with the CRASH code. This code solves for the multi-material hydrodynamics with separate electron and ion temperatures on an Eulerian block-adaptive-mesh and includes a multi-group flux-limited radiation diffusion and electron thermal heat conduction. The goal of the present paper is to demonstrate the capability to simulate radiative shocks of essentially three-dimensional experimental configurations, such as circular and elliptical nozzles. We show that the compound shock structure of the primary and wall shock is captured and verify that the shock properties are consistent with order-of-magnitude estimates. The produced synthetic radiographs can be used for comparison with future nozzle experiments at high-energy-density laser facilities.
description: submitted to High Energy Density Physics
Comprehensive Spectral Analysis of Cyg X-1 using RXTE Data
Creators: name: Shahid, Rizwan
name: Misra, R.
name: Jaaffrey, S. N. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyse a large number ($> 500$) pointed RXTE observations of Cyg X-1 and model the spectrum of each one. A subset of the observations for which there is simultaneous reliable measure of the hardness ratio by the All Sky Monitor, shows that the sample covers nearly all the spectral shapes of Cyg X-1. The relative strength, width of the Iron line and the reflection parameter are in general correlated with the high energy photon spectral index $Γ$. This is broadly consistent with a geometry where for the hard state (low $Γ\sim 1.7$) there is a hot inner Comptonizing region surrounded by a truncated cold disk. The inner edge of the disk moves inwards as the source becomes softer till finally in the soft state (high $Γ> 2.2$) the disk fills the inner region and active regions above the disk produce the Comptonized component. However, the reflection parameter shows non-monotonic behaviour near the transition region ($Γ\sim 2$), suggestive of a more complex geometry or physical state of the reflector. Additionally, the inner disk temperature, during the hard state, is on the average higher than in the soft one, albeit with large scatter. These inconsistencies could be due to limitations in the data and the empirical model used to fit them. The flux of each spectral component is well correlated with $Γ$ which shows that unlike some other black hole systems, Cyg X-1 does not show any hysteresis behaviour. In the soft state, the flux of the Comptonized component is always similar to the disk one, which confirms that the ultra-soft state (seen in other brighter black hole systems) is not exhibited by Cyg X-1. The rapid variation of the Compton Amplification factor with $Γ$, naturally explains the absence of spectra with $Γ< 1.6$, despite a large number having $Γ\sim 1.65$.
description: 12 pages, 8 figures, accepted for publication in Research in Astronomy and Astrophysics (RAA)
Conceptual basis of probability and quantum information theory
Creators: name: Jansson, Christian
Publisher: name: TUHH Universitätsbibliothek
Year: 2022
Subjects: classificationCode: 510
subject: Mathematik

description: These notes present a probabilistic framework that enables a formulation of classical probability theory, thermodynamics, and quantum probability with a common set of four principles or axioms. It explains everything that usual quantum mechanics and classical probability theory does. We emphasize that this framework is not an interpretation of quantum mechanics, such as ''many worlds``, ''Kopenhagen interpretation``, or others. It is a probability algorithm that computes probabilities of future events and additionally enables a reconstruction of quantum theory, thermodynamics, diffusion, and Wiener processes. We distinguish strictly between possibilities and outcomes. Moreover, we use a time concept based on the classification of future, present, and past. Well-known paradoxes are resolved. The superposition principle obtains a new meaning. The inclusion-exclusion principle, well-known in probability theory and number theory, is generalized to complex numbers. Our probabilistic framework is not based on the Hilbert space formalism. It requires only simple set theory and complex numbers. Thus, this theory can be taught in schools. Our framework may be viewed as an axiomatic approach to probability in the sense of Hilbert, who asked for an axiomatic probability theory in his sixth of the twenty-three open problems presented to the International Congress of Mathematicians in Paris in 1900. We have applied our probabilistic algorithm to several problems, including classical problems, statistical mechanics and thermodynamics, diffraction at multiple slits, light reflection, interferometer, delayed-choice experiments, and Hardy's Paradox.
Commutativity and characterisation of certain rings with solvable, hamiltonian or abelian groups of units
Creators: name: Springer, Helen Jean
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: QA 251.3 S66 1975 Microfiche
subject: Commutative rings
subject: Group rings
subject: Rings (Algebra)

description: Bibliography: p. 55.
IDCS J1426.5+3508: Cosmological implications of a massive, strong lensing cluster at Z = 1.75
Creators: name: Gonzalez, Anthony H.
name: Stanford, S. A.
name: Brodwin, Mark
name: Fedeli, Cosimo
name: Dey, Arjun
name: Eisenhardt, Peter R. M.
name: Mancone, Conor
name: Stern, Daniel
name: Zeimann, Greg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The galaxy cluster IDCS J1426.5+3508 at z = 1.75 is the most massive galaxy cluster yet discovered at z > 1.4 and the first cluster at this epoch for which the Sunyaev-Zel'Dovich effect has been observed. In this paper we report on the discovery with HST imaging of a giant arc associated with this cluster. The curvature of the arc suggests that the lensing mass is nearly coincident with the brightest cluster galaxy, and the color is consistent with the arc being a star-forming galaxy. We compare the constraint on M200 based upon strong lensing with Sunyaev-Zel'Dovich results, finding that the two are consistent if the redshift of the arc is z > 3. Finally, we explore the cosmological implications of this system, considering the likelihood of the existence of a strongly lensing galaxy cluster at this epoch in an LCDM universe. While the existence of the cluster itself can potentially be accomodated if one considers the entire volume covered at this redshift by all current high-redshift cluster surveys, the existence of this strongly lensed galaxy greatly exacerbates the long-standing giant arc problem. For standard LCDM structure formation and observed background field galaxy counts this lens system should not exist. Specifically, there should be no giant arcs in the entire sky as bright in F814W as the observed arc for clusters at z \geq 1.75, and only \sim 0.3 as bright in F160W as the observed arc. If we relax the redshift constraint to consider all clusters at z \geq 1.5, the expected number of giant arcs rises to \sim15 in F160W, but the number of giant arcs of this brightness in F814W remains zero. These arc statistic results are independent of the mass of IDCS J1426.5+3508. We consider possible explanations for this discrepancy.
description: 7 pages, 4 figures, Accepted to The Astrophysical Journal
Downlink Coverage Analysis in a Heterogeneous Cellular Network
Creators: name: Madhusudhanan, Prasanna
name: Restrepo, Juan G.
name: Youjian
name: Liu
name: Brown, Timothy X.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we consider the downlink signal-to-interference-plus-noise ratio (SINR) analysis in a heterogeneous cellular network with K tiers. Each tier is characterized by a base-station (BS) arrangement according to a homogeneous Poisson point process with certain BS density, transmission power, random shadow fading factors with arbitrary distribution, arbitrary path-loss exponent and a certain bias towards admitting the mobile-station (MS). The MS associates with the BS that has the maximum SINR under the open access cell association scheme. For such a general setting, we provide an analytical characterization of the coverage probability at the MS.
description: 6 pages, 5 figures, submitted to IEEE Globecom 2012 - Wireless Communications Symposium on Apr 2, 2012
Driving diffusion of scientific innovation - the role of institutional entrepreneurship and open science in synthetic biology
Creators: name: Barth, Giulio
Publisher: name: TUHH Universitätsbibliothek
Year: 2018
Subjects: subject: Institutional Entrepreneurship
subject: Open Science
subject: Synthetic Biology
subject: Diffusion
subject: Institutional Theory
classificationCode: 330
subject: Wirtschaft

description: Effekte von Institutionen auf die Diffusion von wissenschaftlichen Innovationen wurden in mehreren Studien belegt, ohne auf die Schaffung von Institutionen einzugehen. Die Theorie von institutionellen Entrepreneuren thematisiert diese Lücke und erklärt, wie Schlüsselfiguren eine institutionelle Logik verbreiten und auf dieser aufbauende Institutionen schaffen, um die Diffusion von Innovationen zu beeinflussen. In meiner Dissertation validiere ich den vollständigen Prozess ausgehend vom Entrepreneur, der eine Logik verbreitet, bis hin zu Effekten von frei verfügbaren Forschungsmethoden. Basierend auf Analysen von Patenten und Publikationen in der Synthetischen Biologie können wir die Theorie validieren und eine positive Wirkung von frei verfügbaren Forschungsmethoden messen.
description: Multiple studies validated effects of institutions on the diffusion of scientific innovations, but there is a lack in explaining emergence and change of institutions. The institutional entrepreneurship approach faces this limitations and models, how institutional entrepreneurs diffuse an institutional logic to then create institutions in order to facilitate diffusion of innovations. In this thesis, three studies endeavor to validate this end-to-end process beginning from institutional entrepreneurs diffusing a logic to the impact of created institutions on the diffusion of innovation. By drawing from quantitative analyses in the field of synthetic biology, we validate theories on institutional entrepreneurs driving diffusion of institutional logics and a positive impact of open science on knowledge diffusion.
Linear stability analysis of transverse dunes
Creators: name: Melo, Hygor P. M.
name: Parteli, Eric J. R.
name: Andrade, José S.
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Sand-moving winds blowing from a constant direction in an area of high sand availability form transverse dunes, which have a fixed profile in the direction orthogonal to the wind. Here we show, by means of a linear stability analysis, that transverse dunes are intrinsically unstable. Any along-axis perturbation on a transverse dune amplify in the course of dune migration due to the combined effect of two main factors, namely: the lateral transport through avalanches along the dune's slip-face, and the scaling of dune migration velocity with the inverse of the dune height. Our calculations provide a quantitative explanation for recent observations from experiments and numerical simulations, which showed that transverse dunes moving on the bedrock cannot exist in a stable form and decay into a chain of crescent-shaped barchans.
description: 8 pages, 4 figures
Separation of glycine-rich proteins from sea hare eggs and their anti-cancer activity against U937 leukemia cell line
Creators: name: Lee, WonWoo
name: Kim, Won-Suck
name: Ahn, Ginnae
name: Kim, Kil-Nam
name: Heo, Soo-Jin
name: Cho, Moonjae
name: Fernando, I. P. Shanura
name: Kang, Nalae
name: Jeon, You-Jin
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2016
Subjects: sea hare egg (SE)
glycine-rich protein
anti-cancer effect
apoptosis
mitochondrial pathway

description: The present study was designed to investigate the anti-cancer effects of Sea hare eggs (SE) in U937 cells and its major active components. The aqueous extract of SE (ASE), which contained the highest protein content, dose-dependently inhibited the cancer cell's growth (IC50 value, 10.42 ± 0.5 µg/mL). Additionally, ASE markedly caused DNA damage by inducing apoptotic body formation, DNA fragmentation, and accumulation of sub-G1 DNA contents. ASE induced apoptosis by activating caspase-3 and 9 and poly (ADP-ribose) polymerase (PARP) by regulating the expression of Bcl-2/Bax. Moreover, among its molecular weight fractions, the > 30 kDa fraction showed the highest cell-growth-inhibitory effects, which was inhibited by heat treatment. Furthermore, the > 30 kDa fraction had markedly higher glycine content than the ASE. The presence of two protein bands at around 16 and 32 kDa was identified. In addition, two fractions, F1 and F2, were obtained using anion-exchange chromatography, with the F1 having an improved cell-growth-inhibitory effect than the > 30 kDa fraction. Taken together, these results suggest that the ASE contains glycine-rich proteins, including the active 16 and 32 kDa proteins, which account for its anti-cancer effects by inducing apoptosis via regulation of the mitochondrial pathway.
description: EXCLI Journal; 15:Doc329; ISSN 1611-2156