cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 1 of VEGFR2 targeted microbubble-based ultrasound molecular imaging improving the diagnostic sensitivity of microinvasive cervical cancer
Creators: name: Zhong, Junlin
name: Su, Manting
name: Jiang, Ye
name: Huang, Licong
name: Chen, Ying
name: Huang, Zhuoshan
name: Zhang, Xinling
Publisher: name: figshare
Year: 2023
Subjects: Space Science
Medicine
Cell Biology
Biotechnology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Cancer

description: Supplementary Material 1
Sex differences in attentional bias before and after stress induction : an event related potential study
Creators: name: Jackson, ERV
Publisher: name: University Of Tasmania
Year: 2023

description: Females have double the lifetime prevalence of anxiety disorders compared to males. Attentional bias to threat and arousal reactivity have been consistently implicated as a potential mechanism underlying the development and maintenance of anxiety disorders. Sex differences in attentional bias and arousal may contribute towards the prevalence for anxiety disorders in females. There is limited research exploring sex differences in attentional bias, and the literature is inconsistent, possibly due to relying on RT as a dependent measure for attentional bias, and not accounting for baseline arousal. One recent study found females displayed increased arousal and attentional bias to threat following acute stress induction. To replicate and extend these findings ERPs, RT and salivary alpha amylase (sAA, indexed noradrenaline) were measured to examine sex differences in P1 and N1 (reflecting early visual orientation) and P3 component (reflecting conscious allocation of visual resources). sAA results indicated that acute-stress induction produced significant increase in stress hormone noradrenaline, but females did not have heighted arousal reactivity. RT and ERP component analysis indicated no attentional bias to threat in females or males. These findings did not confirm the predictions of the study. The limitations of the present study and future research suggestions are also discussed.
Additional file 2: of Jumu is required for circulating hemocyte differentiation and phagocytosis in Drosophila
Creators: name: Hao, Yangguang
name: Yu, Shichao
name: Luo, Fangzhou
name: Jin, Li
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Figure S1. Loss of jumu affects circulating hemocyte differentiation. Figure S2. Subcellular localization and expression levels of Ena, Fascin, Rho1 and Profilin in circulating hemocytes. Figure S3. Expression levels of Profilin and Rho1 are unchanged in jumu or NimC1 knockdown hemocytes. Figure S4. The expression of NimC1 and the subcellular localization of Ena, Fascin, Rho1 or Profilin. Figure S5. Loss of jumu does not cause DNA overreplication or cell apoptosis. Figure S6. Analysis of the activation of JAK/STAT or JNK signaling pathways. (PDF 14445 kb)
Local Coulomb versus Global Failure Criterion for Granular Packings
Creators: name: Henkes, Silke
name: Brito, Carolina
name: Dauchot, Olivier
name: Van Saarloos, Wim
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Contacts at the Coulomb threshold are unstable to tangential perturbations and thus contribute to failure at the microscopic level. How is such a local property related to global failure, beyond the effective picture given by a Mohr-Coulomb type failure criterion? Here, we use a simulated bed of frictional disks slowly tilted under the action of gravity to investigate the link between the avalanche process and a global generalized isostaticity criterion. The avalanche starts when the packing as a whole is still stable according to this criterion, underlining the role of large heterogeneities in the destabilizing process: the clusters of particles with fully mobilized contacts concentrate local failure. We demonstrate that these clusters, at odds with the pile as a whole, are also globally marginal with respect to generalized isostaticity. More precisely, we observe how the condition of their stability from a local mechanical proprety progressively builds up to the generalized isostaticity criterion as they grow in size and eventually span the whole system when approaching the avalanche.
description: 6 pages, 6 figures
The influence of ratio-reinforcement on video-gaming behaviour
Creators: name: Thomas, JE
Publisher: name: University Of Tasmania
Year: 2023

description: The rapid growth in videogame popularity has sparked considerable public and scientific interest regarding the negative effects of increased exposure and prolonged gameplay. Informed primarily by basic operant conditioning principles this study tested the influence of ratio-based schedules of reinforcement on participant video-gaming duration. It was firstly hypothesised that in-game ratio-reinforcement would significantly contribute to longer gameplay duration when compared to a no reward control condition and, secondly, that rewards awarded on a variable-ratio schedule would be more effective at prolonging gameplay than those awarded on a fixed-ratio schedule. Fifty-one participants were assigned to one of the three reinforcement conditions. Each played a puzzle based video game and their gameplay statistics including playing duration, level restarts (indexing persistence following failure) and flow experience were measured. Ratio-reinforcement significantly extended video-gaming duration, and increased persistence following failure, compared to the control condition. Despite a non-significant difference, there was also evidence to suggest the increased effectiveness of variable- over fixed-ratio reinforcement in prolonging gameplay. The current research provides strong initial evidence for the ability of video-game reinforcement to significantly increase gaming duration, and represents an initial step in understanding prolonged and potentially problematic video-game play.
Purification and properties of a novel trypsin inhibitor from ginkgo fruits and its antiproliferative effect in triple-negative breast cancer cells
Creators: name: Zhao, Xiaohui
name: Zhou, Dayu
name: Ma, Shiliang
name: Zheng, Kexin
name: Li, Ying
name: Huang, Bo
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: A novel low molecular mass ginkgo biloba trypsin inhibitor (GBTI) was isolated from ginkgo fruits (GF) by trypsin inhibitory activity-guided fractionation by using ammonium sulphate precipitation, followed by ultra-filtration, affinity chromatography and RP-HPLC. The molecular mass and amino acid sequence of GBTI was determined using ESI-MS and ESI-MS/MS, respectively. The structure of GBTI was identified as MKNLTVIPPICLKFPN, with a molecular mass of 1826 Da. GBTI was stable in the pH range of 4–8 and in the temperature range of 0–80 °C for 30 min. However, the inhibitory activity of the GBTI reduced when incubated with various metalions (K+, Na+, Fe2+, Mg2+ and Ca2+) . Finally, GBTI exhibited significant antiproliferative effect in human MDA-MB-231 and mouse 4 T-1 triple-negative breast cancer cells and without toxicity to MCF-10A normal breast cells. Our results suggest that GBTI could be exploited as a natural and hyperstable anticancer agent for triple-negative breast cancer patients.
Políticas para a pós-graduação stricto sensu no Brasil e sua relação com instituições militares como o Corpo de Bombeiros
Creators: name: Michael Scheffer Lopes
Publisher: name: Zenodo
Year: 2022
Subjects: Políticas
pós-graduação
stricto sensu
instituições militares
Corpo de Bombeiros

description: As atividades educacionais na pós-graduação stricto sensu brasileira se desenvolvem atualmente em âmbito militar de modo semelhante ao que ocorre tradicionalmente em instituições educativas civis, como nas universidades federais e estaduais, por exemplo.
Emergence of Triplet Correlations in Superconductor/Half Metallic Nanojunctions with Spin Active Interfaces
Creators: name: Halterman, Klaus
name: Valls, Oriol T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study triplet pairing correlations induced in an SFS trilayer (where F is a ferromagnet and S an ordinary s-wave superconductor) by spin flip scattering at the interfaces. We derive and solve self consistently the appropriate Bogoliubov-de Gennes equations in the clean limit. We find that the spin flip scattering generates $m=\pm 1$ triplet correlations, odd in time. We study the general spatial behavior of these and of $m=0$ correlations as a function of position and of spin-flip strength, $H_{spin}$. We concentrate on the case where the ferromagnet is half-metallic. We find that for certain values of $H_{spin}$, the triplet correlations pervade the magnetic layer and can penetrate deeply into the superconductor. The behavior we find depends very strongly on whether the singlet order parameter is in the 0 or $π$ state, which must in turn be determined self-consistently. We also present results for the density of states (DOS) and for the local magnetization, which, due to spin-flip processes, is not in general aligned with the magnetization of the half metal, and near the interfaces, rotates as a function of position and $H_{spin}$. The average DOS in both F and S is shown to exhibit various subgap bound states positioned at energies that depend strongly on the particular junction state and the spin
description: 14 pages including figures (some compressed). Good quality figures available from authors
Additional file 2 of Comparison of adverse maternal and perinatal outcomes between induction and expectant management among women with gestational diabetes mellitus at term pregnancy: a systematic review and meta-analysis
Creators: name: Luo, Rong
name: Wen, Wendy
name: Corsi, Daniel J.
name: Fell, Deshayne B.
name: Taljaard, Monica
name: Wen, Shi Wu
name: Walker, Mark C.
Publisher: name: figshare
Year: 2023
Subjects: subject: Cell Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy

description: Supplementary Material 2: Table S2
B. Tucker House on Buells Lane
Creators: name: Weber, Harvey A.
Publisher: name: Unknown
Year: 1970
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Dwellings

description: This image shows the exterior view of the B. Tucker House located on Buell's Lane in East Hampton. This image was taken by photographer Harvey A. Weber (1917-1991) and is part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
A simulation model for planning and control of forest harvesting operations
Creators: name: Bonita, Manuel Libres
Publisher: name: University of British Columbia
Year: 2011

description: This thesis describes a methodology for examining problems associated with the management and control of forest harvesting operations. The methodology developed is one of a systems simulation with general applicability that permits experimentation with a wide class of logging configurations. A model, capable of simulating multi-source, single-sink configurations with variable internode distances, with -various equipment types and combinations, and with various parameters and functional relationships, is described. Written in FORTRAN IV, the model allows independent users to make modifications in the routine to adapt them to the particular operating rules and policies of their operations. The "validity" of the model is tested and demonstrated for an actual West Coast logging division used as a vehicle for model formulation. The verification procedure involves the examination of the assumptions and rules of operation of the model subsystems, and the historical confirmation that for a particular situation the subsystems together make up a system which displays the behavior and characteristics associated with the real system. Some design and tactical considerations in the execution of the model runs are described. Some experimental design problems, together with possible ways of overcoming them, are discussed. In particular, it is shown that the control variate technique can be effectively used with the model to reduce the variance of the difference between two means under comparison. Simulation experiments with various logging configurations indicated the nature of the interrelationships among the responses of the "logging system". These interrelationships are described with respect to a principal factor - the number of trucks in the hauling fleet. Some practical applications of the logging simulation model are discussed and illustrated. The model can be used to evaluate and compare existing operating policies or to formulate new policies. This application is illustrated with reference to the comparison of two operation shutdown modes. The model can also be beneficial in the determination of the equipment requirements of an operation under different operating conditions. Another benefit from the model can be derived from its capability of increasing our understanding of the "logging system" - through learning how the parts of the system behave and interact and through learning how the system responds to changes in its factors. This capability can be beneficial not only in the design of better policies but also in the exercise of better control of the system.
Discovery of gamma-ray emission from the shell-type supernova remnant RCW 86 with H.E.S.S
Creators: name: HESS Collaboration
name: Aharonian, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The shell-type supernova remnant (SNR) RCW 86, possibly associated with the historical supernova SN 185, with its relatively large size (about 40' in diameter) and the presence of non-thermal X-rays is a promising target for gamma-ray observations. The high sensitivity, good angular resolution of a few arc minutes and the large field of view of the High Energy Stereoscopic System (H.E.S.S.) make it ideally suited for the study of the gamma-ray morphology of such extended sources. H.E.S.S. observations have indeed led to the discovery of the SNR RCW 86 in very high energy (VHE; E > 100 GeV) gamma-rays. With 31 hours of observation time, the source is detected with a statistical significance of 8.5 sigma and is significantly more extended than the H.E.S.S. point spread function. Morphological studies have been performed and show that the gamma-ray flux does not correlate perfectly with the X-ray emission. The flux from the remnant is ~10% of the flux from the Crab nebula, with a similar photon index of about 2.5. Possible origins of the very high energy gamma-ray emission, via either Inverse Compton scattering by electrons or the decay of neutral pions produced by proton interactions, are discussed on the basis of spectral features obtained both in the X-ray and gamma-ray regimes.
description: 6 pages, 5 figures; Accepted for publication in ApJ on October 14, 2008
Heavy-Flavor Production at Accelerators
Creators: name: Kidonakis, Nikolaos
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss heavy flavor production at hadronic facilities. I present total cross sections and differential distributions for top quark, bottom quark, and charm quark production at the Tevatron and LHC colliders, and at fixed-target experiments such as HERA-B. The calculations include complete next-to-leading order corrections as well as higher-order soft-gluon corrections which are important near kinematical threshold.
description: 6 pages, 7 figures; invited talk at PANIC 2008, Eilat, Israel, November 9-14, 2008
Phenolic metabolism in plants: intracellular localization of some enzymes
Creators: name: Camm, Edith Ellen
Publisher: name: University of British Columbia
Year: 2011

description: Two aspects of intracellular organization of phenol metabolism in plants were investigated. The first involved the localization of some reactions in the conversion of tyrosine to plastoquinone, which is accumulated in the chloroplast. More evidence is presented for the formation of p-hydroxyphenylpyruvic acid and homogentisic acid from tyrosine by higher plants, although neither reaction seems to occur in the chloroplast. The second part of this work involved the intracellular localization of several enzymes involved in the phenolic metabolism of potato. Separation of cell fractions by differential centrifugation and sucrose density gradient separation showed that shikimate dehydrogenase and prephenate dehydrogenase are wholly soluble enzymes. In the cases of phenylalanine ammonia lyase and an 0-methyl transferase acting on caffeic acid, 90% of the enzyme was soluble. The remaining 10% of the enzymes that was associated with particulate fractions did not appear to be located in the same fractions. Most of the cinnamic acid hydroxylase in aged potato was found in the microsomal fraction, but some of this enzyme appeared to be associated with other particles. All the enzymes studied increased two-fold or more in activity after the potato tuber was sliced and aged in the light. Cinnamic acid hydroxylase increased in activity and also changed from a mainly soluble enzyme in dormant potato to the microsomal enzyme characteristic of actively metabolizing tissue.
RENASCENCIAS
Creators: name: VADILLO, ENEKO
name: VADILLO PEREZ, ENEKO
name: Vadillo Pérez
Publisher: name: Zenodo
Year: 2023

description: Obra escrita para la casi insólita e inédita combinación de flauta (alto, picolo), clarinete en sib (bajo) y piano. La pieza fue estrenada por el Ensemble Taller Sonoro, con fondos provenientes como encargo del Ministerio de cultura-INAEM, en el Ciclo de Música Contemporánea de los Teatros del Canal en Madrid, el 4 de Octubre 2015, dentro del proyecto Senderos que se bifurcan. Esta obra está inspirada en el trabajo poético de Juan Ramón Jiménez (1881/1958). De alguna manera, según indica Pedro Ordóñez Eslava en un artículo científico sobre esta obra, lo que se ha llamado la poética postespectral de Eneko Vadillo, tiene que ver con la trascendencia que tiene el poema de Juan Ramón Jiménez, Renaceré yo, como inspiración para esta obra.Editada en EMEC.El conjunto formado por piano flauta y clarinetes, no ha sido tratado con interés por los autores en general. pese a hacer grandes y excelentes obras compuestas para esta formación (Saint Saens op 6, Florent Schmitt entre otros) no ha causado el interés que otras formaciones de cámara sí han creado en los autores del siglo XX. Es, por esa misma razón, importante poder cultivar y crear repertorio nuevo que se una o apoye a una formación, que, debido a las características tímbricas de la misa, así como las posibilidades actuales que ofrecen estos instrumentos
On the Notion of a Ribbon Quasi-Hopf Algebra
Creators: name: Sommerhaeuser, Yorck
Publisher: name: arXiv
Year: 2009
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16W30

description: We show that two competing definitions of a ribbon quasi-Hopf algebra are actually equivalent. Along the way, we look at the Drinfel'd element from a new perspective and use this viewpoint to derive its fundamental properties.
description: 18 pages. See also http://www.southalabama.edu/mathstat/personal_pages/sommerh/
Towards Enhancing Energy Consumption and Time Complexity of Combinatorial Algorithms for Solving the Knapsack Problem
Creators: name: Bin Usman, Bashar
name: Isah Kanoma, Saminu
name: Gabi, Danlami
name: Sidiq Nurudeen, Abubakar
name: Umar Suru, Hassan
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 460605
subject: Distributed systems and algorithms
classificationCode: 461302
subject: Computational complexity and computability

description: The increasing demand for energy-efficient and time-optimized computational systems has driven research into combinatorial algorithms, particularly those used to solve the knapsack problem. The knapsack problem is one of the most significant in combinatorial optimization, which involves determining the optimal selection of items to include in a knapsack while adhering to specific constraints, such as weight or profit limits. This study compares the energy consumption and time complexity of the greedy and dynamic programming algorithms applied to this problem. Using power models to measure total energy consumption and execution time, the research reveals that the greedy algorithm is far more efficient, with negligible energy consumption across various scenarios. In contrast, the dynamic programming algorithm, while delivering accurate solutions, consumes more energy and takes longer due to its memory-intensive operations. These findings highlight the need to consider energy and time efficiency in algorithm design, contributing to more sustainable computing practices. Future research will explore larger datasets and focus on instruction-level energy analysis to optimize algorithm performance.
Behaviour, ecology and social organisation in Liopholis whitii: insights into the evolutionary origins of sociality
Creators: name: Halliwell, B
Publisher: name: University Of Tasmania
Year: 2023

description: Sociality is one of the most captivating properties of animal life, encompassing a remarkable diversity of behaviour. As well as varying greatly in form and function, social organisation is taxonomically widespread, indicating convergent benefits of group living. The centrality of social interactions in many ecological processes also makes social organization crucial to our understanding of a range of evolutionary principles. Despite this, both the mechanisms by which natural selection has led to diversity in social systems, and the conditions promoting the initial emergence of group living, remain unclear. If we are to understand how sociality emerges and diversifies over evolutionary time we need an integrated approach that identifies the causes and consequences of variation in social and mating behaviour in ecological settings, and relate this variation to the selective forces modulating social complexity. Reptiles have recently been highlighted as a valuable system to address questions about the evolution of sociality. One lineage in particular, the Egernia skinks of Australia, display considerable variation in social organization, with species representing a continuum of social complexity from solitary living to large communal family groups. This variation in social complexity is matched by parallel variation in rates of genetic monogamy, implicating mating behaviour in the evolutionary forces driving diversity in social traits. Studies suggest that diversification in social and mating behaviour across the group are the result of variation in ecological conditions, specifically variation in the distribution and availability of suitable habitat. However experimental studies evaluating the ecological context dependence of social and mating behaviour are lacking. My PhD had two primary aims. First, to experimentally evaluate the influence of key habitat characteristics on the social and mating behaviour of a family living Egernia skink, Liopholis whitii. Second, to translate this mechanistic understanding of behavioural variation to the processes underlying diversification of social organization more generally. This allowed me to connect processes occurring across levels of biological organization, contributing to a more holistic understanding of the emergence, maintenance and diversification of social living.
Interferometric properties of pulsating C-rich AGB stars I. Intensity profiles and uniform disc diameters of dynamic model atmospheres
Creators: name: Paladini, C.
name: Aringer, B.
name: Hron, J.
name: Nowotny, W.
name: Sacuto, S.
name: Hoefner, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first theoretical study on center-to-limb variation (CLV) properties and relative radius interpretation for narrow and broad-band filters, on the basis of a set of dynamic model atmospheres of C-rich AGB stars. We computed visibility profiles and the equivalent uniform disc radii (UD-radii) in order to investigate the dependence of these quantities upon the wavelength and pulsation phase. After an accurate morphological analysis of the visibility and intensity profiles determined in narrow and broad-band filter, we fitted our visibility profiles with a UD function simulating the observational approach. UD-radii have been computed using three different fitting-methods to investigate the influence of the sampling of the visibility profile: single point, two points and least square method. The intensity and visibility profiles of models characterized by mass loss show a behaviour very different from a UD. We found that UD-radii are wavelength dependent and this dependence is stronger if mass loss is present. Strong opacity contributions from C2H2 affect all radius measurements at 3 micron and in the N-band, resulting in higher values for the UD-radii. The predicted behaviour of UD-radii versus phase is complicated in the case of models with mass loss, while the radial changes are almost sinusoidal for the models without mass loss. Compared to the M-type stars, for the C-stars no windows for measuring the pure continuum are available.
description: 13 pages, 9 figures, accepted for publication in A&A
Oxygen adatoms at SrTiO3(001): A density-functional theory study
Creators: name: Guhl, Hannes
name: Miller, Wolfram
name: Reuter, Karten
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a density-functional theory study addressing the energetics and electronic structure properties of isolated oxygen adatoms at the SrTiO3(001) surface. Together with a surface lattice oxygen atom, the adsorbate is found to form a peroxide-type molecular species. This gives rise to a non-trivial topology of the potential energy surface for lateral adatom motion, with the most stable adsorption site not corresponding to the one expected from a continuation of the perovskite lattice. With computed modest diffusion barriers below 1 eV, it is rather the overall too weak binding at both regular SrTiO3(001) terminations that could be a critical factor for oxide film growth applications.
description: 7 pages including 5 figures; related publications can be found at http://www.fhi-berlin.mpg.de/th/th.html
Uno sguardo oltre confine: i “nuovi lavori” della gig economy. Potenzialità e limiti della comparazione
Creators: name: Biasi, Marco
Publisher: name: Labour & Law Issues
Year: 2018
Subjects: gig economy; classification of “gig workers”; comparative effort

description: Se la comparazione guarda tradizionalmente, anche in ambito lavoristico, alle regole vigenti negli altri ordinamenti, di recente è emersa una chiara tendenza, favorita dalla convergenza a livello globale nelle modalità di lavoro proprie della c.d. economia delle piattaforme, a porre a confronto – non già gli istituti o le norme, bensì – le decisioni che, nelle diverse giurisdizioni, hanno riguardato la qualificazione dei c.d. “gig workers”, tra cui gli autisti di Uber e i riders di Foodora, Deliveroo, ecc.

L’elaborato ripercorre le trame degli arresti più significativi intervenuti in materia, calandoli nel relativo contesto ordinamentale, allo scopo di riflettere sulle potenzialità e, soprattutto, sui limiti di un simile sforzo comparativo da parte degli interpreti nazionali.
description: Labour & Law Issues, V. 4, N. 2 (2018)
Algorithms and ratings: tools to manage labour relations. Proposals to renegotiate labour conditions for platform drivers
Creators: name: Birgillito, Giovanni
name: Birgillito, Marialaura
Publisher: name: Labour & Law Issues
Year: 2018
Subjects: new-economy; employment relations; management of new types of technology; algorithm and ratings; social protection

description: Workers of digital platforms are managed by algorithms and then rated by customers about their work. The aim of the paper is thus to describe how technological innovation is used to manage and control digital workers, and to present to collective actors some proposals in order to negotiate algorithms and technological innovation with the purpose of improving drivers’ working conditions.

In particular, the paper analyses Uber case-study and the technology employed: geo-localisation techniques for smartphones and GPS, as well as algorithms.

The paper is structured in two parts. After a brief analysis of legal cases, in the first part, it describes which technologies are (or could be) employed by the company to estimate the geographic position of users, to match supply and demand and to control drivers in the fulfilment of their working activity. In particular, it goes in depth into some technical issues and parameters used to manage working conditions.

In a second part, by adopting the results of the technical analysis as the starting point, it presents some proposals on how collective bargaining can intervene in the management of those kinds of technology to improve drivers’ working conditions.
description: Labour & Law Issues, V. 4, N. 2 (2018)
Rotating and counterrotating relativistic thin disks as sources of stationary electrovacuum spacetimes
Creators: name: García-Reyes, Gonzalo
name: González, Guillermo A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A detailed study is presented of the counterrotating model (CRM) for electrovacuum stationary axially symmetric relativistic thin disks of infinite extension without radial stress, in the case when the eigenvalues of the energy-momentum tensor of the disk are real quantities, so that there is not heat flow. We find a general constraint over the counterrotating tangential velocities needed to cast the surface energy-momentum tensor of the disk as the superposition of two counterrotating charged dust fluids. We then show that, in some cases, this constraint can be satisfied if we take the two counterrotating tangential velocities as equal and opposite or by taking the two counterrotating streams as circulating along electro-geodesics. However, we show that, in general, it is not possible to take the two counterrotating fluids as circulating along electro-geodesics nor take the two counterrotating tangential velocities as equal and opposite. A simple family of models of counterrotating charged disks based on the Kerr-Newman solution are considered where we obtain some disks with a CRM well behaved. We also show that the disks constructed from the Kerr-Newman solution can be interpreted, for all the values of parameters, as a matter distribution with currents and purely azimuthal pressure without heat flow. The models are constructed using the well-known "displace, cut and reflect" method extended to solutions of vacuum Einstein-Maxwell equations. We obtain, in all the cases, counterrotating Kerr-Newman disks that are in agreement with all the energy conditions.
description: 22 pages, 7 figures, Latex
Stellar mass-loss, rotation and the chemical enrichment of early type galaxies
Creators: name: Pipino, Antonio
name: Chiappini, Cristina
name: Graves, Genevieve
name: Matteucci, Francesca
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a comparison between the [Ca,C,N/Fe]-mass relations observed in local spheroids and the results of a chemical evolution model which already successfully reproduces the [Mg/Fe]-mass and the [Fe/H]-mass relations in these systems. We find that the [Ca/Fe]-mass relation is naturally explained by such a model without any additional assumption. In particular, the observed under-abundance of Ca with respect to Mg can be attributed to the different contributions from supernovae Type Ia and supernovae Type II to the nucleosynthesis of these two elements. For C and N, we consider new stellar yields that take into account stellar mass loss and rotation. These yields have been shown to successfully reproduce the C and N abundances in Milky Way metal-poor stars. The use of these new stellar yields produces a good agreement between the chemical evolution model predictions and the integrated stellar population observations for C. In the case of N, the inclusion of fast rotators and stellar mass-loss nucleosynthesis prescriptions improves our predictions for the slope of the [N/Fe] vs. sigma relation, but a zero point discrepancy of 0.3 dex remains. This work demonstrates that current stellar yields are unable to simultaneously reproduce the large mean stellar [] ratios inferred from integrated spectra of elliptical galaxies and the low N abundance measured in the gas of high redshift spheroids from absorption lines. However, it seems reasonable to suggest that there may be uncertainties in either the inferred stellar or gas-phase N abundances at the level of 0.3 dex. (abriged)
description: 13 pages, 5 figures, MNRAS in press
The suspension of pictorial equilibrium : materialising mutability in the medium of paint
Creators: name: Walch, MJ
Publisher: name: University Of Tasmania
Year: 2023

description: Paint's fluid, plastic and viscous properties were used to renegotiate aspects of the painterly tradition in this studio-based research project. In the paintings that comprise the visual thesis, pictorial elements that are non-dualistic, non-linear and mutable give form to flux. Contemporary conditions of motility ‚Äö- or 'liquid modernity', as articulated by Zygmunt Bauman ‚Äö- are given expression through a reconsideration of precedents in Mannerism, Surrealism and Pop Art that were re-enacted in studio experiments to extend a lineage of eccentricity informed by Nobuo Tsuji's examination of select Edo period painters. The works were executed in enamel, acrylic and oil on composite aluminium panels. Over three suites of paintings, a performative approach was taken. The studio experiments engaged with a range of artists' work, and with a body of contemporary literature about performativity and the agency of maker and material. In the paintings, this is manifest in the coalescence and dispersal of form. Improvisations with liquid paint reference works by Inka Essenhigh, Dale Frank, Jackson Pollock and No‚àö¬¥l Skrzypczak. The physical transformation of form and spatio-temporal relations in the paintings was framed by Catherine Malabou's theory of plasticity. In the first and second suites of works, the lateral movement of fluid enamel paint on a non-absorbent horizontal substrate generated turbulent matrices. Through layering and abrading the surfaces, compressed, buckled pictorial spaces resulted. Improvised gestures were tensioned against various modes of stylistic intervention and mannerist revision. A synthesis of opposing tendencies was accomplished; figuration and abstraction merge, fluidity gives way to viscosity. The pictorial suspension of structure is a manifestation of Georges Bataille's ideas about the informe as not the opposite but the alteration of form. The mark of success for the paintings is their ability to sustain a lack of pictorial equilibrium. Ontological instability is depicted through the paintings' resistance to being read as fixed, and through the unfixed viewing position they seek to dictate. The ultimate ambition is that, in the gallery situation, they effect an arrhythmic attraction and repulsion, making the viewer the very subject of distortion and suspension.
Lyman alpha Radiative Transfer with Dust: Escape Fractions from Simulated High-Redshift Galaxies
Creators: name: Laursen, Peter
name: Sommer-Larsen, Jesper
name: Andersen, Anja C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Lyman alpha emission line is an essential diagnostic tool for probing galaxy formation and evolution. Not only is it commonly the strongest observable line from high-redshift galaxies but from its shape detailed information about its host galaxy can be revealed. However, due to the scattering nature of Lya photons increasing their path length in a non-trivial way, if dust is present in the galaxy the line may be severely suppressed and its shape altered. In order to interpret observations correctly, it is thus of crucial significance to know how much of the emitted light actually escapes the galaxy. In the present work, using a combination of high-resolution cosmological hydro-simulations and an adaptively refinable Monte Carlo Lya radiative transfer code including an advanced model of dust, the escape fractions f_esc of Lya radiation from high-redshift (z = 3.6) galaxies are calculated. In addition to the average escape fraction, the variation of f_esc in different directions and from different parts of the galaxies is investigated, as well as the effect on the emergent spectrum. Escape fractions from a sample of simulated galaxies of representative physical properties are found to decrease for increasing galaxy virial mass M_vir, from f_esc approaching unity for M_vir ~ 10^9 M_sun to f_esc less than 10% for M_vir ~ 10^12 M_sun. In spite of the dust being almost grey, it is found that the emergent spectrum is affected non-uniformly, with the escape fraction of photons close to the line center being much higher than of those in the wings, thus effectively narrowing the Lya line.
description: Submitted to ApJ; comments are very welcome
On the influence of high energy electron populations on metal abundance estimates in galaxy groups and clusters
Creators: name: Prokhorov, Dmitry
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Spectral line emissivities have usually been calculated for a Maxwellian electron distribution. But many theoretical works on galaxy groups and clusters and on the solar corona suggest to consider modified Maxwellian electron distribution functions to fit observed X-ray spectra. Here we examine the influence of high energy electron populations on measurements of metal abundances. A generalized approach which was proposed in the paper by Prokhorov et al. (2009) is used to calculate the line emissivities for a modified Maxwellian distribution. We study metal abundances in galaxy groups and clusters where hard X-ray excess emission was observed. We found that for modified Maxwellian distributions the argon abundance decreases for the HCG 62 group, the iron abundance decreases for the Centaurus cluster and the oxygen abundance decreases for the solar corona with respect to the case of a Maxwellian distribution. Therefore, metal abundance measurements are a promising tool to test the presence of high energy electron populations.
description: 6 pages, 4 figures, accepted for publication in A&A
SoTL project on impact of the dark season on student learning experiences in UNIS: highlights and recommendations
Creators: name: Jawak, Shridhar
name: Tveit, Knut Ivar Lindland
name: van Hazendonk, Charlotte Maartje
name: Verret, Marjolaine
Publisher: name: Zenodo
Year: 2023
Subjects: dark season, student learning, pedagogy, learning activities, teaching practices, polar night,

description: The objective of this report is to understand how the dark season is influencing student learning at the University Centre in Svalbard. This project is led by a group of four researchers, taking part in the Collegial Teaching in Learning in STEM Education course (MNPED660) through the University of Bergen. To understand the impact of the Svalbard dark season on student learning, we conducted a focus group discussion-based study. Here, we provide a synoptic summary and highlight from this study. To conclude, we provide three main recommendations for the University Centre in Svalbard to facilitate the learning process during the dark season: (1) take the dark season into account in course structure and schedule, (2) provide information to students about the dark season and adaptation methods, and (3) make indoor spaces accessible to students for prolonged periods during the dark season.
Unstable-particles pair production in MPTapproach in NNLO
Creators: name: Nekrasov, M. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider pair production and decay of fundamental unstable particles in the framework of a modified perturbation theory treating resonant contributions in the sense of distributions. Outcomes of a numerical simulation up to the NNLO with taking into account universal massless-particles contributions are presented.
description: 3 pages, 1 figure, Talk given at 14th Lomonosov Conference on Elementary Particle Physics, Moscow, August 19-25, 2009
Preliminary study: advancing golf swing analysis via optoelectronic technology for ball contact detection and performance evaluation
Creators: name: Shida, Thiago Kenzo Fujioka
name: Macedo, Victor
name: Freitas, Gabriel
name: Hermida, Paulo
name: Junqueira, Eduardo
name: Ferreira, Alexandre
name: Rocha, Thiago
Publisher: name: Loughborough University
Year: 2024

description: Engineering of Sport 15 - Proceedings from the 15th International Conference on the Engineering of Sport (ISEA 2024)
 Motion analysis technologies, including Inertial Measurement Units (IMUs) and optoelectronic systems, are valuable tools for sports performance evaluation. In golf, pinpointing the precise moment of club-ball contact is critical for analyzing swing metrics and predicting ball trajectory. While Cheon et al. utilized IMUs by identifying the maximum gyroscope value within the swing; and Wood et al. [3] combined optoelectronics and highspeed video; optoelectronic systems remain the gold standard for kinematic analyses due to  their superiority spaciotemporal accuracy, as they can precisely measure marker's position.
However, marker placement limitations on the athlete, club, and ball can introduce challenges like occlusion and potential damage for the markers due to the forceful nature of the swing. This article introduces an algorithm employing optoelectronic motion capture to address these marker placement difficulties and enhance motion analysis in golf.
Political cleavages and political mobilisation in Guyana : the 1968 general election
Creators: name: Greene, John Edward
Publisher: name: University of British Columbia
Year: 2011

description: This study is about the 1968 General Election in Guyana. It argues that while racial cleavage within the society is the single most important determinant of political behaviour, party organisation provides the motive force behind 'the people's choice'. Using aggregate and survey data, the study shows that between 1953 (when the first election under universal adult suffrage was held) and 1968, party identification and political mobilisation had shifted from those based on class antagonism to those based on racial disaffection. However, the change in the electoral machinery — from a system of plurality voting to proportional representation — has forced parties to reform their campaign strategy. The emphasis is on votes gained rather than on seats won. As a result, the local party organisations have become important sources of electoral mobilisation. The victory of Burnham's People's National Congress over Jagan's People's Progressive Party, and D'Aguiar's United Force, is partly explained by the greater impact on the electorate, of the former than the latter. The PNC benefited most from the switching of party support which occurred between the 1964 and 1968 elections, i.e., a switch of party support across the traditional lines of race. Therefore, that the political system of Guyana has not disintegrated is partly because there is this marginal element in the electorate willing to identify across the racial boundaries of party support. The system is saved also by the fact that political patronage is used as a bait to attract and maintain support across racial lines and by the small but articulate band of "political dissenters" whose ideal is to broaden the base of political support more in terras of class than of race.
The Constrained Exceptional Supersymmetric Standard Model
Creators: name: Athron, P.
name: King, S. F.
name: Miller, D. J.
name: Moretti, S.
name: Nevzorov, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose and study a constrained version of the Exceptional Supersymmetric Standard Model (E6SSM), which we call the cE6SSM, based on a universal high energy scalar mass m_0, trilinear scalar coupling A_0 and gaugino mass M_{1/2}. We derive the Renormalisation Group (RG) Equations for the cE6SSM, including the extra U(1)_{N} gauge factor and the low energy matter content involving three 27 representations of E6. We perform a numerical RG analysis for the cE6SSM, imposing the usual low energy experimental constraints and successful Electro-Weak Symmetry Breaking (EWSB). Our analysis reveals that the sparticle spectrum of the cE6SSM involves a light gluino, two light neutralinos and a light chargino. Furthermore, although the squarks, sleptons and Z' boson are typically heavy, the exotic quarks and squarks can also be relatively light. We finally specify a set of benchmark points which correspond to particle spectra, production modes and decay patterns peculiar to the cE6SSM, altogether leading to spectacular new physics signals at the Large Hadron Collider (LHC).
description: Version accepted for publication in Phys. Rev. D
Trabajo en plataformas digitales en España: primeras sentencias y primeras discrepancias
Creators: name: López Balaguer, Mercedes
Publisher: name: Labour & Law Issues
Year: 2018
Subjects: digital economy; platforms; employee; worker; self-employed

description: En el presente trabajo se analizan las dos primeras sentencias dictadas en España sobre la calificación jurídica del trabajo en plataformas digitales y se estudian los problemas que en esta materia se están planteando en el ámbito del Derecho del Trabajo en relación con la dicotomía entre el estatus de trabajador por cuenta propia o ajena en el trabajo en plataformas digitales.
description: Labour & Law Issues, V. 4, N. 2 (2018)
Weyl Quantization of Fractional Derivatives
Creators: name: Tarasov, Vasily E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum analogs of the derivatives with respect to coordinates q_k and momenta p_k are commutators with operators P_k and $Q_k. We consider quantum analogs of fractional Riemann-Liouville and Liouville derivatives. To obtain the quantum analogs of fractional Riemann-Liouville derivatives, which are defined on a finite interval of the real axis, we use a representation of these derivatives for analytic functions. To define a quantum analog of the fractional Liouville derivative, which is defined on the real axis, we can use the representation of the Weyl quantization by the Fourier transformation.
description: 9 pages, LaTeX