cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Milagro Observations of Multi-TeV Emission from Galactic Sources in the Fermi Bright Source List
Creators: name: Abdo, A. A.
name: Allen, B. T.
name: Aune, T.
name: Berley, D.
name: Chen, C.
name: Christopher, G. E.
name: DeYoung, T.
name: Dingus, B. L.
name: Ellsworth, R. W.
name: Gonzalez, M. M.
name: Goodman, J. A.
name: Hays, E.
name: Hoffman, C. M.
name: Huentemeyer, P. H.
name: Kolterman, B. E.
name: Linnemann, J. T.
name: McEnery, J. E.
name: Morgan, T.
name: Mincer, A. I.
name: Nemethy, P.
name: Pretz, J.
name: Ryan, J. M.
name: Parkinson, P. M. Saz
name: Shoup, A.
name: Sinnis, G.
name: Smith, A. J.
name: Vasileiou, V.
name: Walker, G. P.
name: Williams, D. A.
name: Yodh, G. B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the result of a search of the Milagro sky map for spatial correlations with sources from a subset of the recent Fermi Bright Source List (BSL). The BSL consists of the 205 most significant sources detected above 100 MeV by the Fermi Large Area Telescope. We select sources based on their categorization in the BSL, taking all confirmed or possible Galactic sources in the field of view of Milagro. Of the 34 Fermi sources selected, 14 are observed by Milagro at a significance of 3 standard deviations or more. We conduct this search with a new analysis which employs newly-optimized gamma-hadron separation and utilizes the full 8-year Milagro dataset. Milagro is sensitive to gamma rays with energy from 1 to 100 TeV with a peak sensitivity from 10-50 TeV depending on the source spectrum and declination. These results extend the observation of these sources far above the Fermi energy band. With the new analysis and additional data, multi-TeV emission is definitively observed associated with the Fermi pulsar, J2229.0+6114, in the Boomerang Pulsar Wind Nebula (PWN). Furthermore, an extended region of multi-TeV emission is associated with the Fermi pulsar, J0634.0+1745, the Geminga pulsar.
description: Accepted for publication in Astrophysical Journal Letters June 30, 2009
Extracting meaning from strangeness : strategies to enhance viewer engagement with contemporary art in the public art museum
Creators: name: Deeth, Jane Alexandra
Publisher: name: University Of Tasmania
Year: 2023

description: This research questions the notion that contemporary art is difficult to engage with, and considers what the public art museum can do to enhance viewers' experience of contemporary art. Contemporary art in this context is understood as the discursive, ideas-based art that has come to the fore since the 1960s. It is argued that because the formalist aesthetic remains the dominant mode of responding to art, this has limited the capacity for viewers to make sense of more conceptually based contemporary art and, therefore, more discursive approaches need to be enacted for meaningful engagement to occur. While the contributions that artists and curators make in this regard are acknowledged, the focus of the analysis is the constructivist museum as described by George Hein, Eilean Hooper-Greenhill and Elaine Heumann Gurian, especially the emphasis placed on direct experience and participation. It is argued that while constructivism presents some possibilities for increasing engagement, it also has limitations. In particular, in emphasising individual learning over the specifics of artwork, advocates of constructivism run the risk of maintaining the formalist aesthetic as the dominant mode of response to contemporary art. In critiquing the constructivist approach, Helen Illeris's concept of the performative museum and recognition of the existence of a range of interpretive roles for art provides a valuable construct. However, Illeris does not address the issue of how to guide viewers to enact the role most appropriate for the type of art they are encountering. This is particularly problematic when it comes to the reception of discursive based art which requires engagement with ideas rather than aesthetic form. In seeking to understand the rules of engagement appropriate for discursive art practice, aspects of reception theory, in particular ideas about the role of the reader/viewer postulated by philosophers Hans-Georg Gadamer and Jacques Derrida and art historians/theorists Keith Moxey, Mieke Bal, Ian McLean and Justin Paton, are examined. Rather than using their interpretations of particular artworks to explain contemporary art, however, the study examines their behaviours in the act of interpretation. The parallels between these behaviours and the psychoanalytic conversation of Jacques Lacan are discussed and, in doing so, practical strategies for engaging viewers with the discursivity of contemporary art are devised and enacted in a public art museum setting. From the results of this analysis, a reorientation of the role of the public art museum in relation to contemporary discursive art practice is advocated in which the expert speaker becomes the expert listener.
Applying FABRIC as a Tool to Understanding Architectural and Landscape Icons in a Time of Travel Restrictions
Creators: name: McIntosh, Jacqueline
name: Marques, Bruno
Publisher: name: Open Access Victoria University of Wellington | Te Herenga Waka
Year: 2021
Subjects: subject: 120106 Interior Design
subject: FOS: Civil engineering
subject: 120107 Landscape Architecture
subject: 120199 Architecture not elsewhere classified
subject: 130299 Curriculum and Pedagogy not elsewhere classified
subject: FOS: Educational sciences

description: Iconic architecture and landscape architecture are most often understood through photographic media that mediates between the idea and the reality for those learning to design. The drastic lockdown responses to COVID-19 and the limitations on local and international travel highlighted the importance of the visual and the potential of the virtual. However, visual media can also be understood as systems that go far beyond a strict representation of an object. In this climate where publicity, politics, and perception play ever more crucial roles, representations of iconic architecture and landscapes increasingly blur the boundaries between the imaginary and the tangible. This paper examines the experience of iconic architecture and landscape in four iconic European cities (Paris, Barcelona, Seville, and Lisbon) as seen through the eyes of fifty postgraduate architecture, interior architecture, and landscape architecture students from New Zealand. It compares their understanding of a building or landscape from its photographic image before engaging with the physical reality. Students were asked to first identify iconic architecture and landscape, then closely analyze and document the essential qualities which established its pre-eminence. A subsequent visit to each of the places provided the opportunity for comparison and the testing of the realities and fictions of the icons themselves. Our research finds that today’s architecture students are savvy and sophisticated consumers of technology. It also presents FABRIC, a conceptual framework that offers additional scaffolding for educating design students through experiential learning in a time of travel restrictions.
Developing nursing practice to meet the needs of persons admitted to acute care with Chronic Obstructive Pulmonary Disease (COPD) : an action research study
Creators: name: Courtney-Pratt, Helen May
Publisher: name: University Of Tasmania
Year: 2023

description: Acute care nurses represent a large component of the healthcare workforce and are in a prime position to effect better care provision to persons with chronic disease in an acute setting. Many authors highlight the role of nurses in the delivery of care to persons with Chronic Obstructive Pulmonary Disease (COPD) and subsequently urge them to take a proactive role in COPD disease management. In recent times there has been a rise in community or primary health care innovation in care for persons with COPD, and a subsequent improvement of understanding of nursing roles in that area. Nurses in acute care have attracted scant attention in the COPD literature and their role remains characterized by descriptions of task focused support for persons who experience acute exacerbations of the disease. There is a paucity of research which articulates the current situation of nursing care provision for people admitted to hospitals with COPD and how improvements in such care might occur. Specifically, there is a lack of research which includes those acute care nurses-in investigation and improvement of their own practice as it relates to care of persons with COPD. This study addresses the concern of understanding and improving COPD care within hospitals from the perspective of acute care nurses. Nurses from an acute care setting came together to collaboratively work in an action research group, at first to enhance their understandings of the issues that impacted on care provision and then to work toward improving the care received by people with COPD nursed on their ward. The findings suggest that utilizing and action research framework approach is effective in engaging acute care nurses in understanding and improving their practice. However they also highlight the difficulties of undertaking collaborative research in a complex, changing acute care environment and the need to ensure support for such activities from a management perspective. The study adds to what is known of COPD care provision by contributing to understandings of acute care experiences and provision from the perspective of nurses caring for this group of patients. In addition the study demonstrates that is it possible for acute care nurses to be empowered to change practice and to improve care to persons with COPD.
Variational principle for the Wheeler-Feynman electrodynamics
Creators: name: De Luca, Jayme
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We adapt the formally-defined Fokker action into a variational principle for the electromagnetic two-body problem. We introduce properly defined boundary conditions to construct a Poincare-invariant-action-functional of a finite orbital segment into the reals. The boundary conditions for the variational principle are an endpoint along each trajectory plus the respective segment of trajectory for the other particle inside the lightcone of each endpoint. We show that the conditions for an extremum of our functional are the mixed-type-neutral-equations with implicit state-dependent-delay of the electromagnetic-two-body problem. We put the functional on a natural Banach space and show that the functional is Frechet-differentiable. We develop a method to calculate the second variation for C2 orbital perturbations in general and in particular about circular orbits of large enough radii. We prove that our functional has a local minimum at circular orbits of large enough radii, at variance with the limiting Kepler action that has a minimum at circular orbits of arbitrary radii. Our results suggest a bifurcation at some radius below which the circular orbits become saddle-point extrema. We give a precise definition for the distributional-like integrals of the Fokker action and discuss a generalization to a Sobolev space of trajectories where the equations of motion are satisfied almost everywhere. Last, we discuss the existence of solutions for the state-dependent delay equations with slightly perturbated arcs of circle as the boundary conditions and the possibility of nontrivial solenoidal orbits.
Forced-Dissipative Shallow-Water Turbulence on the Sphere and the Atmospheric Circulation of the Giant Planets
Creators: name: Scott, R. K.
name: Polvani, Lorenzo M.
Publisher: name: Columbia University
Year: 2007
Subjects: subject: Atmosphere
subject: Mathematics
subject: FOS: Mathematics
subject: Planetary science

description: Although possibly the simplest model for the atmospheres of the giant planets, the turbulent forced-dissipative shallow-water system in spherical geometry has not, to date, been investigated; the present study aims to fill this gap. Unlike the freely decaying shallow-water system described by Cho and Polvani, equilibrium states in the forced-dissipative system are highly dependent on details of the forcing and the dissipation. For instance, it is found that for a given equilibrated energy level, the steadiness of zonal jets depends crucially on the balance between forcing and dissipation. With long (up to 100 000 days) high-resolution (T170) calculations, the dependence of the equilibrium states on Rossby number Ro and Rossby deformation radius LD is explored, for the case when the dissipation takes the form of hypodiffusion (acting predominantly at large scales) and the random forcing at small scales is δ correlated in time. When LD is large compared to the planetary radius, zonal jets are verified to scale closely with the Rhines scale over a wide range of Ro; furthermore, the jets at the equator are found to be both prograde and retrograde with approximately equal likelihood. As LD is decreased, the equatorial jets become increasingly and consistently retrograde, in agreement with the freely decaying turbulence results. Also, the regime recently discussed by Theiss, where zonal jets are confined to low latitudes, is illustrated to emerge robustly in the limit of small LD. Finally, specific calculations with parameter values typical of the giant planets are presented, confirming many of the earlier results obtained in the freely decaying case.
Noise and nonlinearities in high-throughput data
Creators: name: Nguyen, Viet-Anh
name: Koukolikova-Nicola, Zdena
name: Bagnoli, Franco
name: Lio, Pietro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: High-throughput data analyses are becoming common in biology, communications, economics and sociology. The vast amounts of data are usually represented in the form of matrices and can be considered as knowledge networks. Spectra-based approaches have proved useful in extracting hidden information within such networks and for estimating missing data, but these methods are based essentially on linear assumptions. The physical models of matching, when applicable, often suggest non-linear mechanisms, that may sometimes be identified as noise. The use of non-linear models in data analysis, however, may require the introduction of many parameters, which lowers the statistical weight of the model. According to the quality of data, a simpler linear analysis may be more convenient than more complex approaches. In this paper, we show how a simple non-parametric Bayesian model may be used to explore the role of non-linearities and noise in synthetic and experimental data sets.
description: 12 pages, 3 figures
The Matsuno‐Gill Model and Equatorial Superrotation
Creators: name: Showman, Adam P.
name: Polvani, Lorenzo M.
Publisher: name: Columbia University
Year: 2010
Subjects: Atmosphere
Meteorology
Atmosphere, Upper

description: Equatorial superrotation can be generated in global general circulation models (GCMs) when forced with longitudinally varying heating, similar to that postulated in the Matsuno-Gill model. However, the implications of the classical Matsuno-Gill theory for equatorial superrotation have not, to date, been addressed. Here, we show that the classic, shallow-water Matsuno-Gill solutions do not exhibit equatorial superrotation: although the flow converges westerly momentum from high latitudes to the equator—promoting superrotation—they also contain an artificial source of easterly momentum at the equator that cancels the latitudinal momentum convergence and prevents superrotation from emerging. This artificial momentum source results from a physically inconsistent representation of vertical momentum transport in the model. We show that if the Matsuno-Gill model is modified to properly account for momentum exchange with an underlying quiescent layer, the solutions naturally exhibit equatorial superrotation, at any forcing amplitude.
Distribution of thermophilic and thermotolerant fungi in a spruce-pine chip pile and their effects on some coniferous woods
Creators: name: Ofosu-Asiedu, Albert
Publisher: name: University of British Columbia
Year: 2011

description: A study into the distribution of thermophilic and thermotolerant fungi in a spruce-pine wood chip pile in Prince George was carried out. Five treatments consisting of pine, spruce, incorporation of wood fines into spruce, sterilized spruce and sterilized spruce inoculated with a Ptychogaster sp. were examined. Samples of wood chips buried at six different locations in the chip pile were examined after 3, 6 and 12 months storage periods. From 100 randomly selected chips from each sample the fungi were isolated on 2% malt, 0.5% malic acid and 2% agar at 25° and 45°C. Data on temperature during storage and acidity of wood chips, moisture content and weight loss at the time of sampling were recorded for the six positions in the wood chip pile. Thermophilic fungi colonized the inner regions while thermotolerant fungi inhabited the outer regions of the wood chip pile. Among the thermophilic fungi, listed according to frequency of isolation were Byssochlamys emersonii Stolk-Apinis, Allescheria terrestris Apinis, Sporotrichum thermophile Apinis, Thermoascus aurantiacus Miehe and Humicola lanuginosa (Griffonand Maublanc) Bunce. The most common thermotolerant fungi were Aspergillus fumigatus. Fresenius and Chrysosporium pruinosum (Gilman and Abbot) Comb. Nov. Fungal distribution was generally related to position in the wood chip pile. Of the associated factors temperature (17°-45°C) was most strongly related to fungal distribution, whereas acidity of wood chips and moisture content did not vary greatly between positions. Incubation of wood samples on cultures demonstrated the ability of all the common thermophilic and thermotolerant fungi to cause weight loss of lodge pole pine Pinus contorta Dougl. varlatifolia, ponderosa pine Pinus ponderosa Laws. and spruce Picea glanca (Moench) Voss sap wood samples. These weight losses varied from 0.65% to 25% after six weeks incubation. Temperature, medium and type of wood affected the ability of the fungi to cause weight loss. No synergistic or antagonistic effects' existed between the thermophilic fungi. Chemical analysis of degraded wood indicated that the thermophilic fungi utilized the arabinose fraction of the hemicellulose preferentially.
Opening up the research process
Creators: name: Mietchen, Daniel
name: Penev, Lyubomir
Publisher: name: Zenodo
Year: 2021

description: About This repository hosts the slides for a presentation "Opening up the research process" given at the Open Publishing Festival 2021 on 9 November 2021. Abstract  Since RIO Journal was launched in late 2015, it has stimulated experimentation around the publication of and engagement with research processes, especially those with a strong open science component. In this session, we will zoom in on some of its key features - publication types all along the research cycle, mapped to societal challenges, organized into community-driven collections - and highlight what forms of engagement have evolved around that and how they relate to the wider publishing landscape. Notes See https://etherpad.wikimedia.org/p/Opening-up-the-research-process-2021-11-09 for session notes.
THE HEAT IS ON: COMPARISON OF THERMOREGULATORY BEHAVIOR IN PARASITISED VERSUS UNPARASITIZED CATERPILLARS OF THE TOBACCO HORNWORM, MANDUCA SEXTA (L.) [LEPIDOPTERA: SPHINGIDAE]
Creators: name: Johnston, Jessica
Publisher: name: VCU Libraries
Year: 2020

description: VCU Theses and Dissertations
A theoretical exploration of the adoption of GRI (gobal reporting initiatives) : guidelines in corporate sustainability reports
Creators: name: Deng, SM
Publisher: name: University Of Tasmania
Year: 2023

description: With the trend towards sustainability, society is increasingly calling for organisations to demonstrate their corporate social responsibility (CSR). In response, more and more Australian companies are engaged in CSR reporting. The literature shows differences in the quantity and quality of CSR reporting and also includes ongoing debate as to why companies engage in voluntary corporate social and environmental disclosure (CSED). This thesis aims to use the context of the adoption of Global Reporting Initiatives Sustainability Reporting Guidelines (GRI Guidelines) by Australian mining and banking companies to explore why and how CSED differs in organisations within and between industries. The literature in relation to why companies make CSED contains many ideas but it lacks a coherent theoretical framework. This study views these explanations as possible rationales, on which a model based on the notion of institutional logic is adopted to explore legitimacy management in CSED from a micro-level aspect. In order to understand the rationality behind CSED decisions, a comparative case study approach is utilised, using the banking and mining industries, to explore how these rationales exist and interact in the decision-processes leading to CSED. At the operational level, this study re-examines the relationships about the perceptions of managers of social and environmental pressures, the motivation for CSED, disclosure strategies and outcomes of CSED. Interview and archive data are collected and analysed to facilitate an understanding of the phenomena as well as providing corroborating evidence from different sources. Results indicate that motivations for CSED generally stem from legitimacy risk management. This is consistent with the results of much of the extant literature, which asserts that CSR reporting is a response to pressures exerted by various stakeholders. However, how to respond to the need for legitimacy management can be different. The CSED variations between and within sectors provide evidence that institutional and strategic approaches are used in the decision making of CSED. This study, in contributing to and extending the body of CSED and voluntary disclosure research, provides an understanding of the why and how of CSED from a multi- theoretical perspective and uses the adoption (or not) of the GRI Guidelines as the main vehicles on which the investigation is based.
Enhancement of Rossby Wave Breaking by Steep Potential Vorticity Gradients in the Winter Stratosphere
Creators: name: Scott, R. K.
name: Dritschel, D. G.
name: Polvani, Lorenzo M.
name: Waugh, D. W.
Publisher: name: Columbia University
Year: 2004
Subjects: Atmosphere
Atmosphere, Upper
Atmospheric chemistry

description: This work investigates the extent to which potential vorticity gradients affect the vertical propagation of planetary-scale Rossby waves on the edge of a stratospheric polar vortex and their eventual nonlinear saturation and breaking. Using two different numerical modeling approaches, it is shown that wave propagation and wave breaking are significantly reduced when the potential vorticity gradients at the vortex edge are anomalously weak. The efficiency of the first model, based on high-resolution contour dynamics, permits a full exploration of the parameter space of wave forcing amplitude and edge steepness. A more realistic primitive equation model in spherical geometry both confirms the contour dynamics results and highlights some direct implications for stratospheric modeling in more comprehensive models. The results suggest that stratospheric models using horizontal resolutions of spectral T42 or less may significantly underestimate the vertical propagation and breaking of planetary waves, and may consequently misrepresent such important stratospheric processes as the mean meridional circulation, sudden warmings, and the mixing of chemically distinct polar and midlatitude air.
Relativistic Mott criticality in graphene
Creators: name: Herbut, Igor F.
name: Juricic, Vladimir
name: Vafek, Oskar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We formulate the effective Gross-Neveu-Yukawa theory of the semimetal-insulator transitions on the honeycomb lattice and compute its quantum critical behavior near three (spatial) dimensions. We find that at the critical point Dirac fermions do not survive as coherent excitations and that the $\sim 1/r$ tail of the weak Coulomb interaction is an irrelevant coupling. The emergent Lorentz invariance near criticality implies a universal ratio of the low-temperature specific heats of the metallic and the rotational-symmetry-broken insulating phase.
description: 4 pages, one figure; updated, published version
The Coupled Stratosphere–Troposphere Response to Impulsive Forcing from the Troposphere
Creators: name: Reichler, Thomas
name: Kushner, Paul J.
name: Polvani, Lorenzo M.
Publisher: name: Columbia University
Year: 2005
Subjects: subject: Atmosphere
subject: Atmosphere, Upper
subject: Mathematics
subject: FOS: Mathematics

description: A simple atmospheric general circulation model (GCM) is used to investigate the transient response of the stratosphere–troposphere system to externally imposed pulses of lower-tropospheric planetary wave activity. The atmospheric GCM is a dry, hydrostatic, global primitive-equations model, whose circulation includes an active polar vortex and a tropospheric jet maintained by baroclinic eddies. Planetary wave activity pulses are generated by a perturbation of the solid lower boundary that grow and decay over a period of 10 days. The planetary wave pulses propagate upward and break in the stratosphere. Subsequently, a zonal-mean circulation anomaly propagates downward, often into the troposphere, at lags of 30–100 days. The evolution of the response is found to be dependent on the state of the stratosphere–troposphere system at the time the pulse is generated. In particular, on the basis of a large ensemble of these simulations, it is found that the length of time the signal takes to propagate downward from the stratosphere is controlled by initial anomalies in the zonal-mean circulation and in the zonal-mean wave drag. Criteria based on these anomaly patterns can be used, therefore, to predict the long-term surface response of the stratosphere–troposphere system to a planetary wave pulse up to 90 days after the pulse is generated. In an independent test, it is verified that the initial states that most strongly satisfy these criteria respond in the expected way to the lower-tropospheric wave activity pulse.
Ovary, reproduction, and productivity of female columbian black-tailed deer
Creators: name: Thomas, Donald Charles
Publisher: name: University of British Columbia
Year: 2011

description: Ovarian changes, patterns of reproduction, and age-specific productivity of female Columbian black-tailed deer (Odocoileus hemionus columbianus) on Vancouver Island were elucidated largely by examination of serial, stained sections of ovaries from 444 females. Well-defined, 8 or 9-day, follicular cycles occur during the breeding season in November and early December. Many follicles rupturing at first ovulation are asynchronous and of extreme sizes. Relatively small (4-5 mm³), short-lived (8-day) corpora lutea develop after first ovulation; these rapidly regress after second ovulation, while the corpora lutea of pregnancy grow to 100 mm³, within 5-8 days. The changes in ovarian structures during the breeding season were ascertained in 12 females, whose follicles and corpora lutea were dated by the cleavage stage of fertilized ova. These provided criteria for estimating ovulation dates in other females. In each cycle, about 50% of the adult females ovulated within an 8-day period. The mean date of first ovulation in each of the 5 years was approximately November 16; the second ovulation followed after a remarkably short period of 8-9 days. About 96% of the females conceived at second ovulation and 4% on subsequent ovulations. A high proportion of 'silent heats' accompany first ovulation, as indicated by lack of sperm on four of six ova. Growth curves, based on fetuses conceived at second ovulation, provided the conception dates of two late conceivers—those containing more than one generation of regressed corpora lutea of non-pregnancy. Females may cycle at least five times if pregnancy does not occur. Accessory corpora lutea develop in large and small unruptured follicles, in small ruptured follicles, and in regressing corpora lutea. They occurred in 47% of females between first and second ovulation and in 36% of pregnant females. Minimum loss of ova was 8.3% in all females that produced corpora lutea and 4.3% in females that became pregnant, of which 3.1% was moribund fetuses. Corpora lutea of pregnancy, corresponding to the number of fetuses, develop into distinctive scars, which persist for the life of the doe. Pregnancy rates of the previous season, as well as the long term productivity of individuals and the population, were estimated from these. The average number of viable fetuses per doe increased progressively from 0.91 in yearlings to 1.81 in the 5-5 to 6.5 age-classes, and thereafter decreased. These changes in fertility with age were mirrored by changes in weight and girth. The relative contribution of fawns by each age-class in the population progressively decreased with age. One hundred females of reproductive age produced about 137 fawns.
Traffic optimization in transport networks based on local routing
Creators: name: Scellato, Salvatore
name: Fortuna, Luigi
name: Frasca, Mattia
name: Gómez-Gardeñes, Jesús
name: Latora, Vito
Publisher: name: arXiv
Year: 2009
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Congestion in transport networks is a topic of theoretical interest and practical importance. In this paper we study the flow of vehicles in urban street networks. In particular, we use a cellular automata model to simulate the motion of vehicles along streets, coupled with a congestion-aware routing at street crossings. Such routing makes use of the knowledge of agents about traffic in nearby roads and allows the vehicles to dynamically update the routes towards their destinations. By implementing the model in real urban street patterns of various cities, we show that it is possible to achieve a global traffic optimization based on local agent decisions.
description: 4 pages, 5 figures
Evidence of large-scale flow in the outer atmosphere of the early post-AGB stage star IRAS22272+5435
Creators: name: Zacs, Laimons
name: Pukitis, Karlis
Publisher: name: Zenodo
Year: 2021
Subjects: Post-asymptotic giant branch stars

description: High-resolution spectra gathered during an extensive monitoring of IRAS22272+5435 are inspected to search for spectroscopic variability in the time span of less than two weeks with a time resolution of 1-2 days. Significant variations are found both in the intensity and position of CN (1,0) Red System lines near the light maximum, when the star is the hottest. The intensity of variable CN lines correlates with their Doppler redshift – an increase in the radial velocity leads to decrease of its equivalent width. The inward flow of increasing velocity from about 14.4 to 21.6 km/s was confirmed in the atmosphere, propagating about 25 solar radii toward the mass center of the star in 11 days. The variability of CN (1,0) lines are accompanied by changes in the red wings of strong low-excitation lines. The observed short-term variations are attributed to large-scale convective flows in the extended atmosphere of a cool pulsating post-AGB star. At the light minimum, when the star is the coolest, the CN lines are much stronger and blueshifted by about -5.0 km/s on average relative to the photospheric atomic lines, however, a significant variation was not found during the time span of 7 days.
Occupy’s Alliance With Labor
Creators: name: Collado, Suzanne
Publisher: name: Columbia University
Year: 2013
Subjects: Social structure
Industrial relations
Social sciences--Research

description: "When Occupy Wall Street (Occupy or OWS) emerged, it seemed that organized labor would be a likely ally. Both aimed at shifting the balance of power between the sources of capital and those of labor. But differences in organizational structures posed large obstacles for any collaboration between these two movements. OWS operated through a method of consensus-based decision-making, prizing participant access and direct democracy. Trade unions generally concentrated their power at the top, where leaders expected disciplined unity from the rank and file. Over the course of several months, efforts were made by both sides to harmonize and collaborate, especially in the lead-up to organizing the May Day events of 2012. This essay analyzes these efforts and describes what each movement had to gain from an alliance. By drawing on extensive field interviews with key voices from Occupy, trade unionists, and rank and file workers, I explore how a future labor movement could be shaped by involvement in OWS. Yet I found that the same limitations that historically kept organized labor from growing in radical and democratic directions also served to keep the OWS spirit at bay. Structural control prevented unions from spontaneous engagement, and cumbersome bureaucratic processes slowed them down when compared with the more fluid and fast-moving OWS activists. However, it was clear to me that union members who did have contact with Occupy saw the potential for change that lay within union culture. Occupiers and union members alike came away from their encounters with OWS with a sharpened appetite for direct democracy and direct action."
Studies of the life histories and morphology of Tasmanian conifers.
Creators: name: Elliott, Charles Gordon
Publisher: name: University Of Tasmania
Year: 2023

description: Within its small area, Tasmania presents a remarkable profusion of endemic plants, a number of them belonging to genera which are confined to the state. Among the most interesting are the conifers, a list of which appears on page 3. Of these the genera Microcachrys, Athrotaxis, and Diselma are entirely confined to Tasmania, while the native species of Phyllbeladus, Daervdium, Pherosphaera, as well as Callitris oblonga, are all endemic. Modern research on conifer morphology has revealed a remarkable diversity in the order as a whole. The lack of information on some genera is obscuring our understanding of the interrelationships of the main groups. These genera are mostly found in isolated areas and have not been extensively cultivated; consequebntly few of them have been investigated. This is specially true of the Tasmanian conifers, our knowledge of most of which is very meagre.
Additional file 1 of CRISPR/Cas9-mediated genome editing directed by a 5S rRNA–tRNAGly hybrid promoter in the thermophilic filamentous fungus Humicola insolens
Creators: name: Fan, Chao
name: Zhang, Wei
name: Su, Xiaoyun
name: Ji, Wangli
name: Luo, Huiying
name: Zhang, Yuhong
name: Liu, Bo
name: Yao, Bin
name: Huang, Huoqing
name: Xu, Xinxin
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Table S1: Primers used in this study; Table S2: The DNA sequence of the tRNAGly from H. insolens; Figure S1: Multiple amino acid sequence alignment of Pks from H. insolens with four Pks homologs; Figure S2: Multiple amino acid sequence alignment of Xyr1 from H. insolens with four Xyr1 homologs.
title: Towards Gamification of Advanced Value Stream Analysis and Design: A Game-Based Learning Concept
Creators: name: Geisthardt, Mick
name: Engel, Lutz
name: Schnegelberger, Monika
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Advanced Value Stream Analysis and Design
subject: CRISP Gamification Framework
subject: Game-Based Learning
subject: Simulation Game
subject: Resource-efficient Thinking

description: Advancing the traditional methodology of value stream analysis and design to include aspects such as material flow cost accounting, information logistics and external influential factors, overall application complexity and increasing data volumes are causing a shift in how improvement teams should think and operate. As a result, also the professional training of students and professionals needs to change and requires new solutions. Existing research efforts have not yet resulted in a solution that can convey advanced value stream analysis and design, including its methodological complexity. To address this gap, this paper applies a tailored CRISP gamification framework to develop a game-based learning concept to enable teaching of advanced value stream analysis and design to students and professionals focusing on identification of multi-stage resource-efficient optimization strategies. Activity cycles and progression stairs of the resulting simulation game concept facilitates innovative education while aiming to promote cognitive, motivational, and behavioral learning.
Existence and uniqueness of solutions for Fokker-Planck equations on Hilbert spaces
Creators: name: Bogachev, Vladimir
name: Da Prato, Giuseppe
name: Röckner, Michael
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H15, 60J35, 60J60, 47D07

description: We consider a stochastic differential equation in a Hilbert space with time-dependent coefficients for which no general existence and uniqueness results are known. We prove, under suitable assumptions, existence and uniqueness of a measure valued solution, for the corresponding Fokker--Planck equation. In particular, we verify the Chapman--Kolmogorov equations and get an evolution system of transition probabilities for the stochastic dynamics informally given by the stochastic differential equation.
description: 29 pages
Heat conduction in 2D strongly-coupled dusty plasmas
Creators: name: Hou, Lu-Jing
name: Piel, Alexander
Publisher: name: arXiv
Year: 2008
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We perform non-equilibrium simulations to study heat conduction in two-dimensional strongly coupled dusty plasmas. Temperature gradients are established by heating one part of the otherwise equilibrium system to a higher temperature. Heat conductivity is measured directly from the stationary temperature profile and heat flux. Particular attention is paid to the influence of damping effect on the heat conduction. It is found that the heat conductivity increases with the decrease of the damping rate, while its magnitude agrees with previous experimental measurement.
description: 4 pages, 2 figures, presented in SCCS2008 conference
Discussion on Mantle Plume Uplift in the Sedimentary Record: Origin of Kilometre-Deep Canyons within Late Neoproterozoic Successions, South Australia
Creators: name: Christie-Blick, Nicholas
name: Williams, G. E.
name: Gostin, V. A.
Publisher: name: Columbia University
Year: 2001
Subjects: Submarine geology
Geomorphology
Paleoclimatology

description: Nicholas Christie-Blick writes: Kilometre-deep buried canyons in the upper Neoproterozoic successions of South Australia are unusual by any standard, and any viable explanation for their origin will probably involve an unusual set of circumstances. Williams and Gostin (2000) review published geological constraints and competing hypotheses, and suggest a role for uplift and crustal deformation associated with the passage of a mantle plume. On the basis of available evidence, I continue to favour an alternative explanation—that they are due to the short-lived evaporative drawdown of sea level in a marine embayment that became temporarily isolated from the global ocean. Response: Canyons more than 1 km deep in the Wonoka Formation of the Adelaide fold belt and up to 700 m deep in the subsurface of the eastern Officer basin are reasonably interpreted as coeval and of common origin, with a length scale of order 1000 km. Comparable erosional features are found nowhere else in Australia, even in the Kimberley region and western Officer basin, where flood basalts of possible plume origin are widespread. Bender (2000) independently noted the distribution of late Neoproterozoic to early Palaeozoic magmatism in Western Australia, and analyzed the possible role of plume-related uplift and erosional thinning of the crust in early Palaeozoic subsidence of the Canning basin. However, that basin is some 2000 km to the northwest of the Adelaide fold belt, where the canyons are best known.
title: Proposing a Framework to address the Sustainable Development Goals
Creators: name: Schult, Prince Garcia
name: Losse, Ann-Kathrin
name: Czarnecki, Christian
name: Sultanow, Eldar
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Sustainable Development Goals
subject: Green IT
subject: framework

description: Reducing poverty, protecting the planet, and improving life on earth for everyone are the essential goals of the "2030 Agenda for Sustainable Development"committed by the United Nations (UN). Achieving those goals will require technological innovation as well as their implementation in almost all areas of our business and day-to-day life. This paper proposes a high-level framework that collects and structures different uses cases addressing the goals defined by the UN. Hence, it contributes to the discussion by proposing technical innovations that can be used to achieve those goals. As an example, the goal "Climate Actionïs discussed in detail by describing use cases related to tackling biodiversity loss in order to conservate ecosystems.
R code and output for 'How to use statistics to claim antagonism and synergism from binary mixture experiments'
Creators: name: Ritz, Christian
Publisher: name: Zenodo
Year: 2021
Subjects: dose addition
dose-response analysis
factorial design
fixed-ratio design
independent action

description: R code and output for the analysis of two publicly available datasets obtained from binary mixture experiments. Specifically, it is shown how to analyze data from a single-dose factorial design and from a fixed-ratio design using analysis of variance and dose-response analysis. respectively.
The magneto-ionic triple splitting of ionospheric echoes.
Creators: name: Ellis, Graeme Reade Anthony
Publisher: name: University Of Tasmania
Year: 2023

description: In 1933 T. L. Ackersley (1) observed F region ionospheric echoes -which appeared to be magneto-ionically split into three components instead of the usual two. as occurrence of such triple splitting was not reported again until 1936 when Toshniwal (2) in Allahabad and Harang (3) in Tromso both observed similar phenomena. Harang was the first to publish a P'f curve of the echo structure which showed beyond doubt that the third or z echo was of magneto-ionic origin and that it had the following characteristics: (i)The critical frequency was approximately... less than that of Us ordinary echo and fH less than that of the extraordinary echo. (ii)In the absence of an F1 layer, at a given frequency the heights of the three types of echoes were in the order X, 0, Z upwards. (iii)The 4 echo was weak compared with 0 and X echoes. These features made it probable that Z echoes were due to reflection at the third possible level predicted by the Appleton-Hartree magnetic-ionic theory. However, as we shall discuss in detail later, this theory which explains all the major features of ionospheric propagation, does not predict the simultaneous occurrence of three echoes at vertical incidence. The anomaly was recognised by many workers and several alternative summations and theories were advanced to account for it. None was conclusive, mainly because of insufficient experimental information.
Singular sources in gravity and homotopy in the space of connections
Creators: name: Gravanis, E.
name: Willison, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Topology (math.AT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Suppose a Lagrangian is constructed from its fields and their derivatives. When the field configuration is a distribution, it is unambiguously defined as the limit of a sequence of smooth fields. The Lagrangian may or may not be a distribution, depending on whether there is some undefined product of distributions. Supposing that the Lagrangian is a distribution, it is unambiguously defined as the limit of a sequence of Lagrangians. But there still remains the question: Is the distributional Lagrangian uniquely defined by the limiting process for the fields themselves? In this paper a general geometrical construction is advanced to address this question. We describe certain types of singularities, not by distribution valued tensors, but by showing that the action functional for the singular fields is (formally) equivalent to another action built out of \emph{smooth} fields. Thus we manage to make the problem of the lack of a derivative disappear from a system which gives differential equations. Certain ideas from homotopy and homology theory turn out to be of central importance in analyzing the problem and clarifying finer aspects of it. The method is applied to general relativity in first order formalism, which gives some interesting insights into distributional geometries in that theory. Then more general gravitational Lagrangians in first order formalism are considered such as Lovelock terms (for which the action principle admits space-times more singular than other higher curvature theories).
description: 21 pages, 9 figures, RevTeX
Directional studies in cosmic rays : with particular reference to processes involving mesons.
Creators: name: Fenton, Keith Bryan
Publisher: name: University Of Tasmania
Year: 2023

description: Cosmic ray investigations in Hobart were initiated by my brother Dr. A. G. Fenton in 1946. The problem chosen by him for investigation was the high latitude E-W asymmetry, since it seemed that, during the difficult period of building up a research programme in a field which has attracted many workers in other parts of the norld, useful results might be obtained from the beginning. The first measurements carried out by my brother and Dr. D.W.P. Burbury indicated that an asymmetry existed at Hobart. In 1948, I was able to take an active part in this work. It had become apparent that measurements in a higher geomagnetic latitude would be desirable. My brother and I therefore suggested to the Australian National Antarctic Research Expedition (A.N.A.R.E.) that measurements should be made at the Antarctic Scientific Station on Macquarie Island, which had just been established. We were able to secure a grant from A.N.A.R.E. to construct the necessary equipment for this work.