cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Surface modification of recycled tire rubber to enhance mechanical properties of rubberized cement mortar
Creators: name: Ahsan, Sanjida
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Recycled tire rubber
Surface modification
Cement mortar

description: The incorporation of recycled tire rubber in cement composite has shown potential as an environmentally sustainable approach to managing the increasing volumes of scrap tires. Due to the excellent shock absorbance and flexibility properties of rubber, the inclusion of discarded tire rubber in portland cement concrete has advantages like an increase in flexibility, toughness, and impact resistance. However, the inclusion of recycled tire rubber results in a significant decrease in compressive strength. This research explores using a new rubber chemical treatment process to modify the surface of discarded rubber. This new process is a two-step chemical treatment that entails halogenation of the rubber followed by amine functionalization. The effect of using rubber treated with this chemical treatment process in mortar was investigated. The results showed that the beneficial effects of adding rubber on impact resistance remained, and the adverse effects on strength were partially overcome when treated rubber was used. Specifically, it was seen that mortars containing treated rubber had higher compressive strength than mortars containing untreated rubber. This increase was attributed to the chemical surface treatment increasing the hydrophilicity of the rubber through the introduction of favorable functional bonds on the surface of the rubber with cement composite. Additionally, no adverse effect was observed on the early hydration kinetics of mortars containing treated rubber. Overall, the two-step chemical treatment showed promising results for the valorization of scrap rubber tires for use in cement-based composites. Furthermore, this study makes significant contributions to the current state of the art in several key areas. It shows that rubber hydrophilicity is a significant factor impacting the strength of Portland cement composites containing crumb rubber and highlights the potential for underestimation of the hydrophilicity of rubber when measured with deionized water. Additionally, the study sheds light on the efficacy of using halogenation and amine functionalization processes for the treatment of crumb rubber and provides valuable insights on which bond functionalization groups to target for the use of treated rubber in cement composites. The study also brings forth a new understanding of the behavior of concrete containing crumb rubber and indicates that there is an optimum treated rubber content at which further increases do not result in increasing impact resistance. Thus, design concrete at this optimum content to maximize compressive strength and impact resistance of concrete containing treated rubber.
The effect of Cu-doping on the magnetic and transport properties of La0.7Sr0.3MnO3
Creators: name: Kim, M. S.
name: Yang, J. B.
name: Cai, Q.
name: Zhou, X. D.
name: James, W. J.
name: Yelon, W. B.
name: Parris, P. E.
name: Buddhikot, D.
name: Malik, S. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The effects of Cu-doping on the structural, magnetic, and transport properties of La0.7Sr0.3Mn1-xCuxO3 (0 < x < 0.20) have been studied using neutron diffraction, magnetization and magnetoresistance (MR) measurements. All samples show the rhombohedral structure with the R3c space-group from 10K to room temperature (RT). Neutron diffraction data suggest that some of the Cu ions have a Cu3+ state in these compounds. The substitution of Mn by Cu affects the Mn-O bond length and Mn-O-Mn bond angle resulting from the minimization of the distortion of the MnO6 octahedron. Resistivity measurements show that a metal to insulator transition occurs for the x more than 0.15 samples. The x = 0.15 sample shows the highest MR(_80%), which might result from the co-existence of Cu3+/Cu2+ and the dilution effect of Cu-doping on the double exchange interaction.
description: a zip file
Reimer, Ingrid: Verbindliches Leben in Bruderschaften, Kommunitäten, Lebensgemeinschaften
Creators: name: Krüger, Hanfried
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 35 Nr. 3 (1986): Ökumenische Rundschau, Band 35, Heft 3
Exploring Urban Environments By Random Walks
Creators: name: Blanchard, Ph.
name: Volchenkov, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: A complex web of roads, walkways and public transport systems can hide areas of geographical isolation very difficult to analyze. Random walks are used to spot the structural details of urban fabric.
description: 17 pages, 12 figures
Reconstructing the Triaxial Shapes of Dark Matter Halos from the Anisotropic Spatial Distributions of their Substructures in the Concordance Cosmology
Creators: name: Lee, Jounghun
name: Kang, Xi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We develop an algorithm to reconstruct the triaxial shapes of dark matter halos from the anisotropic spatial distributions of their substructures for the concordance background cosmology. First, we construct an analytic model for the anisotropic spatial distribution of dark halo substructures under the assumption that the tidal field with non-zero trace in the triaxial mass distribution of the host halos generates the substructure bulk motions toward the major principal axes of the hosts. Our analytic model implies that the degree of anisotropy depends sensitively on the triaxiality of the host halos as well as the correlation between the substructure locations and the tidal shear field. Second, we set the axis ratios of the triaxial host halos as free parameters in the analytic model, fit the model to the numerical results from high-resolution N-body simulation of the concordance cosmology, and reconstruct the two axis-ratios of the host halos from the best-fit values of the free parameters. The comparison of the reconstructed axis ratios with the numerical results reveals a good agreement. Finally, we conclude that our analytic model may provide a physical understanding of the anisotropic spatial distribution of dark halo substructures and a new way to reconstruct in principle the triaxial shapes of dark matter halos from the observables.
description: accepted for publication in ApJ, discussion on the limitation of the algorithm added, typos and mistakes corrected, 14 pages, 12 figures
Lichdi, Diether Götz: Über Zürich und Witmarsum nach Addis Abeba
Creators: name: Geldbach, Erich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 35 Nr. 3 (1986): Ökumenische Rundschau, Band 35, Heft 3
Terrestrial Pacific giant salamanders (dicamptodon tenebrosus Good): natural history and their response to forest practices
Creators: name: Johnston, Barbara
Publisher: name: University of British Columbia
Year: 2009

description: The Pacific Giant Salamander (Dicamptodon tenebrosus Good) is red listed, or considered endangered, in British Columbia. Habitat loss through forest harvesting poses the largest potential threat to the species' persistence in the province. Although studies have examined the ecology of larval Pacific Giant Salamanders, virtually nothing is known about the terrestrial phase of this species: their natural history, the effects of timber harvesting, or the efficacy of proposed management strategies. During the summer and fall of 1996 and 1997,1 used radio-telemetry to examine the movements and habitat use of terrestrial Pacific Giant Salamanders in forested habitat in south-western British Columbia and north-western Washington. By tracking animals in old growth, second growth, clearcut and buffered habitats, I also investigated the effects of clearcut logging on these animals, the efficacy of riparian buffer strips for their conservation, and their dispersal or recolonization ability. Terrestrial Pacific Giant Salamanders were found to be relatively sedentary creatures that spent the vast majority of their time in refugia such as burrows, rotten logs and streams. During the summer and fall, they wandered somewhat randomly throughout suitable habitat, showing no evidence of restricted home ranges or seasonal migrations. They were predominantly nocturnal, and their activity level was strongly associated with rain. The location of daytime refugia was associated with the availability of coarse woody debris, water, rock and leaf litter. Although the response of terrestrial PGS to forest practices was ambiguous, some study results suggested that terrestrial Pacific Giant Salamanders may be adversely affected by clearcut logging. Catch per unit effort was lower in clearcut habitat than in forested habitat, and animals inhabiting clearcuts appeared to adjust their behaviour in ways that reduced their risk of desiccation. Riparian buffer strips twenty to thirty meters in width appeared to be a promising management strategy for the conservation of terrestrial Pacific Giant Salamanders. Buffers seemed to maintain the relative abundance of terrestrial animals at levels comparable to those in forested habitat, and the movement patterns of animals in buffer strips were indistinguishable from those of animals found in continuous forest.
The Analysis of Facial Feature Deformation using Optical Flow Algorithm
Creators: name: Jesemi, Dayang Nur Zulhijah Awang
name: Ujir, Hamimah
name: Hipiny, Irwandi
name: Juan, Sarah Flora Samson
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Facial features deformed according to the intended facial expression. Specific facial features are associated with specific facial expression, i.e. happy means the deformation of mouth. This paper presents the study of facial feature deformation for each facial expression by using an optical flow algorithm and segmented into three different regions of interest. The deformation of facial features shows the relation between facial the and facial expression. Based on the experiments, the deformations of eye and mouth are significant in all expressions except happy. For happy expression, cheeks and mouths are the significant regions. This work also suggests that different facial features' intensity varies in the way that they contribute to the recognition of the different facial expression intensity. The maximum magnitude across all expressions is shown by the mouth for surprise expression which is 9x10-4. While the minimum magnitude is shown by the mouth for angry expression which is 0.4x10-4.
description: 9 pages
FUSE Spectroscopy of the White Dwarf in U Geminorum
Creators: name: Long, Knox S.
name: Brammer, Gabriel
name: Froning, Cynthia S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations of U Gem with FUSE confirm that the WD is heated by the outburst and cools during quiescence. At the end of an outburst, the best uniform temperature WD model fits to the data indicate a temperature of 41,000 - 47,000 K, while in mid-quiescence, the temperature is 28,000 - 31,000 K, depending on the gravity assumed for the WD. Photospheric abundance patterns at the end of the outburst and in mid-quiescence show evidence of CNO processing. Improved fits to the spectra can be obtained assuming there is a hotter, heated portion of the WD, presumably an accretion belt, with a temperature of 60,000 - 70,000 K occupying 14-32% of the surface immediately after outburst. However, other relatively simple models for the second component fit the data just as well and there is no obvious signature that supports the hypothesis that the second component arises from a separate region of the WD surface. Hence, other physical explanations still must be considered to explain the time evolution of the spectrum of U Gem in quiescence. Strong orbital phase dependent absorption, most likely due to gas above the disk, was observed during the mid-quiescence spectrum. This material, which can be modeled in terms of gas with a temperature of 10,000-11,000 K and a density of 10**13 cm**-3, has a column density of ~2 10**21 cm**-2 at orbital phase 0.6-0.85, and is probably the same material that has been observed to cause dips in the lightcurve at X-ray wavelengths in the past. The discrepancy described by Naylor et al. (2005) between the radius of the WD derived on the one hand by the UV spectral analysis and the distance to U Gem, and on the other, by the orbital elements and the gravitational redshift remains a serious problem.
description: 52 pages, including 6 tables and 12 figures. Acecepted for publication in ApJ, Vol 681 (Sept 2006)
Lexical elicitation based on 300-word Swadesh list
Creators: name: Kajkwakhrattxi, Nokêrê
name: Kajkwakhrattxi, Orengô
name: Kajkwakhrattxi, Rowthyktxi
name: Beauchamp, Jérémie
name: Lapierre, Myriam
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: Kajkwakhrattxi language

description: Includes typed field notes on daily basis. See associated field notes for originals.
Manipulation of dermis based collagen networks with engineered mechanical behaviour for applications in the tanning sector
Creators: name: Autiello, Maria Assunta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: In this thesis, technologies and processes of the biomaterial field, were implemented in the tanning sector, in order to obtain leather prototypes having engineered mechanical properties such as tear resistance and elastic recovery. The work is basically divided in two parts. First, the characterization of conventional leather material is reported and it is aimed at defining the benchmarks to which the chemical physical parameters of the engineered products need to be compared. The obtained results provided information on the structure-composition-functions relationship of animal skin and most importantly they provided clear hints on how to modify the substrate and in what step of the tanning process this is most convenient.
Second, the identification of materials and the chemical–physical strategies is disclosed. Materials and processes were studied in order to most effectively affect the macroscopic properties of the final product. Then, the chemical-physical characterization of the obtained engineered samples is reported. Finally, tanning process was performed in order to realize engineered prototypes.
Two manipulation strategies were implemented: crosslink and reinforcement. Crosslink involved the use of high temperature while reinforcement was carried out selecting polymeric materials to be delivered within dermis. In particular, polydimethylsiloxane and nylon were selected in order to increase tear resistance while elastomeric materials were selected in order to improve elastic recovery. Good prototypes were obtained using PDMS and Elastollan as elastomeric polymer. In particular increase of tear resistance were higher of 30% and improvement in the elastic recovery was found obtaining a decrease of  20% for the permanent strain values.
On the equivariant main conjecture of Iwasawa theory
Creators: name: Witte, Malte
Publisher: name: arXiv
Year: 2005
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R23 (Primary), 11R18, 19F27, 11R42 (Secondary)

description: Recently, D. Burns and C. Greither (Invent. Math., 2003) deduced an equivariant version of the main conjecture for abelian number fields. This was the key to their proof of the equivariant Tamagawa number conjecture. A. Huber and G. Kings (Duke Math. J., 2003) also use a variant of the Iwasawa main conjecture to prove the Tamagawa number conjecture for Dirichlet motives. We use the result of the second pair of authors and the Theorem of Ferrero-Washington to reprove the equivariant main conjecture in a slightly more general form. The main idea of the proof is essentially the same as in the paper of D. Burns and C. Greither, but we can replace complicated considerations of Iwasawa $mu$-invariants by a considerably simpler argument.
description: 24 pages, minor changes, final version, to appear in Acta Arithmetica
Treatment of flux shape uncertainties in unfolded, flux-averaged neutrino cross-section measurements
Creators: name: Koch, Lukas
name: Dolan, Stephen
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The exact way of treating flux shape uncertainties in unfolded, flux-averaged neutrino cross-section measurements can lead to subtle issues when comparing the results to model predictions. There is a difference between reporting a cross section in the (unknown) real flux, and reporting a cross section that was extrapolated from the (unknown) real flux to a fixed reference flux. A lot of (most?) current analyses do the former, while the results are compared to model predictions as if they were the latter. This leads to (part of) the flux shape uncertainty being ignored, potentially leading to wrong physics conclusions. The size of the effect is estimated to be sub-dominant, but non-negligible in two example measurements from T2K and MINERvA. This paper describes how the issue arises and provides instructions for possible ways how to treat the flux shape uncertainties correctly.
description: 11 pages, 4 figures, accepted manuscript
Single-spin asymmetries and Qiu-Sterman effect(s)
Creators: name: Bacchetta, Alessandro
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss the relation between the Qiu-Sterman effects on one hand and the Collins, Sivers and Boer-Mulders effects on the other hand. It was suggested before that some of these effects are in fact the same, thus providing interesting connections between transverse-momentum dependent twist-2 functions and collinear twist-3 functions. Here I propose an alternative way to reach similar conclusions.
description: Contribution to the proceedings of "The International Workshop on Transverse Polarisation Phenomena in Hard Processes" (Transversity 2005), Como, Italy, 7-10th September 2005. (1 ref. added in v2)
Marketing Practices for Vegetables
Creators: name: Powers, Nicholas J.
name: Powers, Nicholas J.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: This report describes vegetable marketing practices of first handlers (firms that receive growers' vegetables), provides estimates of each method's prevalence, and explains the basic motivation for each procedure. Over time, these practices have evolved and expanded, with some becoming more important than others.
A Note on Affinely Regular Polygons
Creators: name: Huck, Christian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52B05 (Primary); 52C23, 11R04, 52A10, 52B20, 12F10 (Secondary)

description: The affinely regular polygons in certain planar sets are characterized. It is also shown that the obtained results apply to cyclotomic model sets and, additionally, have consequences in the discrete tomography of these sets.
description: 10 pages, 1 figure
High Rises and Housing Stress
Creators: name: St-Hilaire, Cloé
name: Brunila, Mikael
name: Wachsmuth, David
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences

description: The financialization of housing is a rapidly growing concern for planning researchers and policymakers, but the opacity of property ownership in most cities has hampered efforts to rigorously measure the phenomenon. Here we introduce a new approach based on big data methods. By combining web scraping of property assessment, business registry, and rental advertisement data, we reliably identified the networks of property ownership lurking behind anonymous numbered companies and established the extent of financialized rental housing ownership. We demonstrate the effectiveness of this approach with a quantitative case study of the financialization of rental housing in Montreal (Canada). Using spatial regression and clustering analyses, we found that there are two distinct types of financialized rental housing ownership in Montreal: one characterized by precarious and student tenants and another characterized by affluent tenants. In general, high proportions of financialized ownership are associated with higher levels of housing stress and dense housing typologies. By demonstrating meaningful differences in housing market outcomes across financialization status—which has not usually been readily accessible to either renters or planners—our findings show the importance of rental market information asymmetry. Planners should treat landlord data as one component of the information necessary to properly regulate a rental housing market. Municipalities should make property ownership information publicly accessible to facilitate public scrutiny of residential land use and more effective protection of tenant rights.
Dynamical symmetry and analytical solutions of the non-autonomous quantum master equation of the dissipative two-level system: decoherence of quantum register
Creators: name: Wang, Shun-Jin
name: An, Jun-Hong
name: Luo, Hong-Gang
name: Jia, Cheng-Long
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on the non-autonomous quantum master equation, we investigate the dissipative and decoherence properties of the two-level atom system interacting with the environment of thermal quantum radiation fields. For this system, by a novel algebraic dynamic method, the dynamical symmetry of the system is found, the quantum master equation is converted into a Schrödinger-like equation and the non-Hermitian rate (quantum Liouville) operator of the master equation is expressed as a linear function of the dynamical u(2) generators. Furthermore, the integrability of the non-autonomous master equation has been proved for the first time. Based on the time-dependent analytical solutions, the asymptotic behavior of the solution has been examined and the approach to the equilibrium state has been proved. Finally, we have studied the decoherence property of the multiple two-level atom system coupled to the thermal radiation fields, which are related to the quantum register.
description: 10 pages, Revtex4
Propagating torsion in the Einstein frame
Creators: name: Poplawski, Nikodem J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Einstein-Cartan-Saa theory of torsion modifies the spacetime volume element so that it is compatible with the connection. The condition of connection compatibility gives constraints on torsion, which are also necessary for the consistence of torsion, minimal coupling, and electromagnetic gauge invariance. To solve the problem of positivity of energy associated with the torsionic scalar, we reformulate this theory in the Einstein conformal frame. In the presence of the electromagnetic field, we obtain the Hojman-Rosenbaum-Ryan-Shepley theory of propagating torsion with a different factor in the torsionic kinetic term.
description: 10 pages; published version
A NJL-based study of the QCD critical line
Creators: name: Barducci, A.
name: Casalbuoni, R.
name: Pettini, G.
name: Ravagli, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We employ a 3 flavor NJL model to stress some general remarks about the QCD critical line. The dependence of the critical curve on $μ_q=(μ_u+μ_d)/2$ and $μ_I=(μ_u-μ_d)/2$ is discussed. The quark masses are varied to confirm that, in agreement with universality arguments, the order of transition depends on the number of active flavors $N_f$. The slope of the critical curve vs. chemical potential is studied as a function of $N_f$. We compare our results with those recently obtained in lattice simulations to establish a comparison among different models.
description: 17 pages, 5 figures
Finding Mutual Benefit in Urban Development
Creators: name: Geva, Yinnon
name: Siemiatycki, Matti
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Information Systems not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Science Policy

description: Public and nonprofit agencies struggle to compete for space in cities as development pressures and unaffordability intensify. We have identified a potential solution in creative mixed-use projects: ad hoc, cross-sectoral partnerships to develop mixed-use buildings involving a public or nonprofit use. We built our analysis on a census of 54 projects in Toronto (Canada), interviews with 24 stakeholders, and a rich data set of secondary sources. We traced the emergence of this approach in Toronto over 2 decades, mapping its geographical expansion, stakeholder diversification, and the various mutually beneficial spatial arrangements of buildings. Building on the theory of collaborative advantage, we analyzed the motivations behind cross-sector partnered ventures, finding a gradual shift from resorting to partnership in reaction to obstacles to partnerships strategically designed to pool together land, resources, and support for development. Third, we highlight here the role of champions in underwriting risks and the limits of relying on market solutions for social purposes. We conclude by discussing the relevance of collaborative city-building in land-constrained North American planning contexts. Government agencies, nonprofit organizations, and developers alike can benefit from creative mixed-use partnerships, which unlock access to land, resources, development capacities, and community support. Contrary to popular perceptions, intentional separation of nonprofit and for-profit uses can be mutually beneficial. Despite the one-off nature of creative mixed-use development, it can be propelled by an initial cohort of successful partnerships and landmark projects. Limited-time leases, insufficient organizational capacity, and low market demand hinder its implementation.
A tuning algorithm for a sliding mode controller of buildings with ATMD
Creators: name: Concha, Antonio
name: Thenozhi, Suresh
name: Jiménez-Betancourt, Ramón O.
name: Gadi, S. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper proposes an automatic tuning algorithm for a sliding mode controller (SMC) based on the Ackermann's formula, that attenuates the structural vibrations of a seismically excited building equipped with an Active Tuned Mass Damper (ATMD) mounted on its top floor. The switching gain and sliding surface of the SMC are designed through the proposed tuning algorithm to suppress the structural vibrations by minimizing either the top floor displacement or the control force applied to the ATMD. Moreover, the tuning algorithm selects the SMC parameters to guarantee the following closed-loop characteristics: 1) the transient responses of the structure and the ATMD are sufficiently fast and damped; and 2) the control force, as well as the displacements and velocities of the building and ATMD are within acceptable limits under the frequency band of the earthquake excitation. The proposed SMC shows robustness against the unmodeled dynamics such as the friction of the damper. Experimental results on a reduced scale structure permits demonstrating the efficiency of the tuning algorithm for the SMC, which is compared with the traditional Linear Quadratic Regulator (LQR) and with the Optimal Sliding Mode Controller (OSMC).
description: 26 pages, 17 figures, Accepted in Mechanical Systems and Signal Processing
Productive Frictions
Creators: name: Jamme, Huê-Tâm
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Walking, biking, and transit are known to shape street commerce, whereas private motorized mobility is assumed to act against it. I advance a new theory of productive frictions according to which opportunities for street commerce depend not on the mode of transportation but on the mode of interaction between people in motion and the built environment. The construct of productive frictions is grounded in Vietnam’s motorbike-centric urbanism. There, what core factors relate private motorized mobility with vibrant retail that anchors street life? To answer this question, I recorded 68 interviews and 333 video clips of street life in Ho Chi Minh City in 2018. Grounded theory methods guided systematic data collection, coding, and mixed methods analyses that led to the conceptualization of productive frictions. Productive frictions are the opportunities for social interactions produced by the contact of people on the move with the built environment they traverse. In Ho Chi Minh City, the core factors that create contact and make motorbike riders particularly prone to productive frictions include: slow speed, direct sensory perceptions, ease of weaving in and out of traffic, and abundant stimuli from stalls, stores, and people lining the streets. Evidence suggests that motorbike riders experience productive frictions less intensely than pedestrians but over greater distances, whereas automobilists generally experience low levels of productive frictions. Productive frictions support small businesses, which shape accessibility, economic vibrancy, and street life. Cities like Ho Chi Minh City experiencing rising automobility should preserve motorized two-wheeled mobility for their productive frictions benefits, at least until mass transit is sufficiently developed to support dense and walkable urbanism.
Phonological elicitation on word-final V epenthesis
Creators: name: Kajkwakhrattxi, Nokêrê
name: Kajkwakhrattxi, Orengô
name: Beauchamp, Jérémie
name: Lapierre, Myriam
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: Kajkwakhrattxi language

description: Includes typed field notes on daily basis. See associated field notes for originals.
Detection of amino acetonitrile in Sgr B2(N)
Creators: name: Belloche, A.
name: Menten, K. M.
name: Comito, C.
name: Müller, H. S. P.
name: Schilke, P.
name: Ott, J.
name: Thorwirth, S.
name: Hieret, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Amino acids are building blocks of proteins and therefore key ingredients for the origin of life. The simplest amino acid, glycine, has long been searched for in the interstellar medium but has not been unambiguously detected so far. Since the search for glycine has turned out to be extremely difficult, we aimed at detecting a chemically related species (possibly a direct precursor), amino acetonitrile. With the IRAM 30m telescope we carried out a complete line survey of the hot core regions Sgr B2(N) and (M) in the 3 mm range, plus partial surveys at 2 and 1.3 mm. We analyzed our 30m line survey in the LTE approximation and modeled the emission of all known molecules simultaneously. We identified spectral features at the frequencies predicted for amino acetonitrile lines having intensities compatible with a unique rotation temperature. We also used the VLA to look for cold, extended emission from amino acetonitrile. We detected amino acetonitrile in Sgr B2(N) in our 30m telescope line survey and conducted confirmatory observations of selected lines with the IRAM PdB and the ATCA interferometers. The emission arises from a known hot core, the Large Molecule Heimat, and is compact with a source diameter of 2 arcsec (0.08 pc). We derived a column density of 2.8e16 cm-2, a temperature of 100 K, and a linewidth of 7 km s-1. Based on the simultaneously observed continuum emission, we calculated a density of 1.7e8 cm-3, a mass of 2340 Msun, and an amino acetonitrile fractional abundance of 2.2e-9. The high abundance and temperature may indicate that amino acetonitrile is formed by grain surface chemistry. We did not detect any hot, compact amino acetonitrile emission toward Sgr B2(M) or any cold, extended emission toward Sgr B2, with column-density upper limits of 6e15 and 3e12-14 cm-2, respectively. (abridged)
description: 30 pages, 8 figures, accepted for publication in Astronomy and Astrophysics (A&A). Version 2: minor changes (one author affiliation added, one reference updated). Version 3: minor changes (typos) for final version
Simulations of Multiple Nova Eruptions Induced by Wind Accretion in Symbiotic Systems
Creators: name: Hillman, Yael
name: Kashi, Amit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We use a combined binary evolution code including dynamical effects to study nova eruptions in a symbiotic system. Following the evolution, over $\sim10^5$ years, of multiple consecutive nova eruptions on the surface of a $1.25M_\odot$ white dwarf (WD) accretor, we present a comparison between simulations of two types of systems. The first is the common, well known, cataclysmic variable (CV) system in which a main sequence donor star transfers mass to its WD companion via Roche-lobe overflow. The second is a detached, widely separated, symbiotic system in which an asymptotic giant branch donor star transfers mass to its WD companion via strong winds. For the latter we use the Bondi-Hoyle-Lyttleton prescription along with orbital dynamics to calculate the accretion rate. We use the combined stellar evolution code to follow the nova eruptions of both simulations including changes in mass, accretion rate and orbital features. We find that while the average accretion rate for the CV remains fairly constant, the symbiotic system experiences distinct epochs of high and low accretion rates. The examination of epochs for which the accretion rates of both simulations are similar, shows that the evolutionary behaviors are identical. We obtain that for a given WD mass, the rate that mass is accreted ultimately determines the development, and that the stellar class of the donor is of no significance to the development of novae. We discuss several observed systems and find that our results are consistent with estimated parameters of novae in widely separated symbiotic systems.
description: Accepted for publication in MNRAS
Analysis of MERCATOR data Part I: variable B stars
Creators: name: De Cat, P.
name: Briquet, M.
name: Aerts, C.
name: Goossens, K.
name: Saesen, S.
name: Cuypers, J.
name: Yakut, K.
name: Scuflaire, R.
name: Dupret, M. -A.
name: observers, many
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We re-classified 31 variable B stars which were observed more than 50 times in the Geneva photometric system with the P7 photometer attached to the MERCATOR telescope (La Palma) during its first 3 years of scientific observations. HD89688 is a possible beta Cephei/slowly pulsating B star hybrid and the main mode of the COROT target HD180642 shows non-linear effects. The Maia candidates are re-classified as either ellipsoidal variables or spotted stars. Although the mode identification is still ongoing, all the well-identified modes so far have a degree l = 0, 1 or 2.
description: 4 pages, 3 figures. To appear in: Proceedings of JENAM 2005 'Distant worlds', Communications in Asteroseismology
Bieser, Gerhard, Sauter, Gerhard: Wie Christen ihre Schuld bekennen
Creators: name: Wilkens, Erwin
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 35 Nr. 3 (1986): Ökumenische Rundschau, Band 35, Heft 3
The periodic standing-wave approximation: nonlinear scalar fields, adapted coordinates, and the eigenspectral method
Creators: name: Bromley, Benjamin
name: Owen, Robert
name: Price, Richard H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The periodic standing wave (PSW) method for the binary inspiral of black holes and neutron stars computes exact numerical solutions for periodic standing wave spacetimes and then extracts approximate solutions of the physical problem, with outgoing waves. The method requires solution of a boundary value problem with a mixed (hyperbolic and elliptic) character. We present here a new numerical method for such problems, based on three innovations: (i) a coordinate system adapted to the geometry of the problem, (ii) an expansion in multipole moments of these coordinates and a filtering out of higher moments, and (iii) the replacement of the continuum multipole moments with their analogs for a discrete grid. We illustrate the efficiency and accuracy of this method with nonlinear scalar model problems. Finally, we take advantage of the ability of this method to handle highly nonlinear models to demonstrate that the outgoing approximations extracted from the standing wave solutions are highly accurate even in the presence of strong nonlinearities.
description: RevTex, 32 pages, 13 figures, 6 tables
Behavioural responses of killer whales to whale-watching : opportunistic observations and experimental approaches
Creators: name: Williams, Robert Michael
Publisher: name: University of British Columbia
Year: 2009

description: Johnstone Strait provides important summer habitat for British Columbia's northern resident killer whales (Orcinus orca). The site is also an active whale-watching area. A voluntary code of conduct recommends that boaters do not approach whales closer than 100 m to address perceived, rather than demonstrated, effects of boat traffic on killer whales. The purpose of my study was to test the relevance of this guideline. Relationships between boat traffic and whale behaviour were studied in 1995 and 1996 by shore-based theodolite tracking of 25 identifiable focal animals from the population of 209 whales. Individual killer whales were repeatedly tracked in the absence of boats and during approaches by a 5.2 m motorboat that paralleled each whale at 100 m. In addition, whales were tracked opportunistically, when no effort was made to manipulate boat traffic. Dive times, swim speeds, and surface active behaviours such as breaching and spyhopping were recorded. Male killer whales swam significantly faster than females. Whales responded to experimental approaches by adopting a less predictable path than observed during the preceding, no-boat period, although males and females employed subtly different avoidance tactics. Females responded by swimming faster and increasing the angle between successive dives, whereas males maintained their speed and chose a smooth, but less direct, path. Canonical correlations between whale behaviour and vessel proximity are consistent with these conclusions, which suggests that weakening whale-watching guidelines, or not enforcing them, would result in higher levels of disturbance. High variability in whale behaviour underscores the importance of experimental studies when assessing behavioural impacts of human activity on killer whales.
A Wrench in the Machine
Creators: name: Branham, Jordan
name: Salvesen, David
name: Kaza, Nikhil
name: BenDor, Todd K.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Federal, state, and local government funding helps stimulate urban development, with growth machine politics playing an important role in determining where subsidies are allocated. The U.S. Coastal Barrier Resources Act (CBRA) was enacted to curb the role of federal subsidies in fostering development along hazardous coastal barriers, providing an opportunity to explore how local growth politics are influenced by the removal of one source of government funding. In this study, we used a series of interview-based case studies to investigate why certain areas in the CBRA developed while most did not. In most cases, the CBRA obstructed local growth coalitions, isolating landowners from the resources necessary to improve the growth potential of their land interests. However, in cases where development occurred within the CBRA, we often found evidence that powerful growth machines were able to acquire replacement subsidies from state and local governments, suggesting these actions are a key driver in overcoming the financial barriers posed by the CBRA. This study revealed how growth machines could be hampered by removing access to the financial resources of one level of government, despite the potential to be undermined by intervention at other levels. In an era of increasing coastal risks, subsidy removal can be an effective tool for managing coastal growth, even when authority over land use decisions is limited.
The static and dynamic conductivity of warm dense Aluminum and Gold calculated within a density functional approach
Creators: name: Dharma-wardana, M. W. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The static resistivity of dense Al and Au plsmas are calculated where all the needed inputs are obtained from density functional theory (DFT). This is used as input for a study of the dynamic conductivity. These calculations involve a self-consistent determination of (i) the equation of state (EOS) and the ionization balance, (ii) evaluation of the ion-ion, and ion-electron pair-distribution functions, (iii) Determination of the scattering amplitudes, and finally the conductivity. We present data for the static resistivity of Al for compressions 0.1-2.0, and in the temperature range T= 0.1 - 10 eV. Results for Au in the same temperature range and for compressions 0.1-1.0 is also given. In determining the dynamic conductivity for a range of frequencies consistent with standard laser probes, a knowledge of the electronic eigenstates and occupancies of Al- or Au plasma becomes necessary. They are calculated using a neutral-pseudoatom model. We examine a number of first-principles approaches to the optical conductivity, including many-body perturbation theory, molecular-dynamics evaluations, and simplified time-dependent DFT. The modification to the Drude conductivity that arises from the presence of shallow bound states in typical Al-plasmas is examined and numerical results are given at the level of the Fermi Golden rule and an approximate form of time-dependent DFT.
description: 5 figures, Latex original. Cross-referencced to PLASMA PHYSICS
The fully developed remnant of a neutrino-driven supernova: Evolution of ejecta structure and asymmetries in SNR Cassiopeia A
Creators: name: Orlando, S.
name: Wongwathanarat, A.
name: Janka, H. -T.
name: Miceli, M.
name: Ono, M.
name: Nagataki, S.
name: Bocchino, F.
name: Peres, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Abridged. We aim at exploring to which extent the remnant keeps memory of the asymmetries that develop stochastically in the neutrino-heating layer due to hydrodynamic instabilities (e.g., convective overturn and the standing accretion shock instability) during the first second after core bounce. We coupled a 3D HD model of a neutrino-driven SN explosion with 3D MHD/HD simulations of the remnant formation. The simulations cover 2000 years of expansion and include all physical processes relevant to describe the complexities in the SN evolution and the subsequent interaction of the stellar debris with the wind of the progenitor star. The interaction of large-scale asymmetries left from the earliest phases of the explosion with the reverse shock produces, at the age of $\approx 350$~years, an ejecta structure and a remnant morphology which are remarkably similar to those observed in Cas A. Small-scale structures in the large-scale Fe-rich plumes created during the initial stages of the SN, combined with HD instabilities that develop after the passage of the reverse shock, naturally produce a pattern of ring- and crown-like structures of shocked ejecta. The consequence is a spatial inversion of the ejecta layers with Si-rich ejecta being physically interior to Fe-rich ejecta. The full-fledged remnant shows voids and cavities in the innermost unshocked ejecta resulting from the expansion of Fe-rich plumes and their inflation due to the decay of radioactive species. The asymmetric distributions of $^{44}$Ti and $^{56}$Fe and their abundance ratio are both compatible with those inferred from high-energy observations of Chandra and NuSTAR. The main asymmetries observed in the ejecta distribution of Cas A can be explained by the interaction of the reverse shock with the large-scale asymmetries that developed from stochastic processes that originate during the first seconds of the SN blast.
description: 33 pages, 29 figures, 1 Table, 4 movies, 3 interactive graphics, accepted for publication on A&A, high quality figures will be available on the published paper
Attraversare i confini tra umano e natura: nel corpo della città selvatica
Creators: name: Basso, Sara
Publisher: name: Ri-Vista. Research for landscape architecture
Year: 2021

description: Recensione al libro. La città selvatica. Paesaggi urbani contemporanei, Libria, Melfi, 2019. A cura di Annalisa Metta e Maria Livia Olivetti. Con contributi di: Eleonora Ambrosio, Paolo Camilletti, Gianni Celestini, Daniela Colafranceschi, Isotta Cortesi, Fabio Di Carlo, Andrea Filpa, Teresa Galì-Izard, Mathieu Gontier, Annalisa Metta, Luca Molinari, Lucia Nucci, Maria Livia Olivetti, Franco Panzini, Gabriele Paolinelli, Laura Zampieri
description: Ri-Vista. Research for landscape architecture, Vol. 19 No. 2 (2020): Landscape Representation Skills
Recent results on fully leptonic and semileptonic charm decays
Creators: name: Wiss, Jim
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We begin with giving some motivation for the study of charm semileptonic and fully leptonic decays. We turn next to a discussion of semileptonic absolution branching fraction results form CLEO-c. Two exciting high statistics results on fully leptonic decays of the D+ -> mu+ nu and Ds+ -> mu+ nu from CLEO-c and BaBar are reviewed. We turn next to a discussion of recent results on charm meson decay to pseudo-scalar l nu decays from FOCUS, BaBar, and CLEO-c. We conclude with a review of charm meson decay into Vector l nu.
description: Flavor Physics and CP Violation Conference, Vancouver, 2006. 11 pages 20 figures. Updated for fixed typos, and included new references. Updated for minor style changes and additional references