cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Automorphisms and abstract commensurators of 2-dimensional Artin groups
Creators: name: Crisp, John
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F36, 20F55, 20F65, 20F67

description: In this paper we consider the class of 2-dimensional Artin groups with connected, large type, triangle-free defining graphs (type CLTTF). We classify these groups up to isomorphism, and describe a generating set for the automorphism group of each such Artin group. In the case where the defining graph has no separating edge or vertex we show that the Artin group is not abstractly commensurable to any other CLTTF Artin group. If, moreover, the defining graph satisfies a further `vertex rigidity' condition, then the abstract commensurator group of the Artin group is isomorphic to its automorphism group and generated by inner automorphisms, graph automorphisms (induced from automorphisms of the defining graph), and the involution which maps each standard generator to its inverse. We observe that the techniques used here to study automorphisms carry over easily to the Coxeter group situation. We thus obtain a classification of the CLTTF type Coxeter groups up to isomorphism and a description of their automorphism groups analogous to that given for the Artin groups.
description: Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol9/paper32.abs.html
A Survey of Requirement Engineering Process in Android Application Development
Creators: name: Nawaz, Ali
name: Rehman, Attique Ur
name: Butt, Wasi Haider
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Mobile application development is the most rapidly growing industry in the world. Nowadays, people totally depend on smart phones for performing daily routine tasks which results in tremendous rises in the expectation of human being from IT industry which increase the requirements of human being. In order to tackle the uncontrolled changes in the requirements, IT experts performed some proper requirement engineering process (REP). Therefore, in this paper we are performing industry survey by asking them several questions related to the REP from android developer in order to understand the REP used in the IT industry. Results we extract from this study is satisfactory used in order to make REP more effective.
Interfacial charge transfer and gate induced hysteresis in monochalcogenide InSe/GaSe heterostructures
Creators: name: Kumar, Arvind Shankar
name: Wang, Mingyuan
name: Li, Yancheng
name: Fujita, Ryuji
name: Gao, Xuan P. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Heterostructures of 2D van der Waals semiconductor materials offer a diverse playground for exploring fundamental physics and potential device applications. In InSe/GaSe heterostructures formed by sequential mechanical exfoliation and stacking of 2D monochalcogenides InSe and GaSe, we observe charge transfer between InSe and GaSe due to the 2D van der Waals interface formation and a strong hysteresis effect in the electron transport through the InSe layer when a gate voltage is applied through the GaSe layer. A gate voltage dependant conductance decay rate is also observed. We relate these observations to the gate voltage dependant dynamical charge transfer between InSe and GaSe layers.
Magnetic transition in Ni-Pt alloy Systems : Experiment and Theory
Creators: name: Kumar, Uday
name: Padmalekha, K. G.
name: Mukhopadhyay, P. K.
name: Paudyal, Durga
name: Mookerjee, Abhijit
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report here the preparation and measurements on the susceptibility, sound velocity and internal friction for Ni-Pt systems. We then compare these experimental results with the first principle theoretical predictions and show that there is reasonable agreement with experiment and theory.
description: 9 pages, 5 figures. submitted to Journal of Magnetism and Magnetic Materials
Composition-dependent protein-material interaction of Poly(Methyl Methacrylate-co-styrene) nanoparticle series
Creators: name: Seifert, Barbara
name: Baudis, Stefan
name: Wischke, Christian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 615

description: Polymer nanoparticles continue to be of high interest in life science applications. Still, adsorption processes occurring in protein-containing media and their implications for biological responses are not generally predictable. Here, the effect of nanoparticle composition on the adsorption of bovine serum albumin (BSA), fibronectin (FN) and immunoglobulin G (IgG) as structurally and functionally different model proteins was explored by systematically altering the composition of poly(methyl methacrylate-co-styrene) nanoparticles with sizes in a range of about 550 nm. As determined by protein depletion from the suspension medium via a colorimetric assay, BSA and IgG adsorbed at similar quantities, while FN reached larger masses of adsorbed protein (up to 0.4 ± 0.06 µg·cm−2 BSA, 0.42 ± 0.09 µg·cm−2 IgG, 0.72 ± 0.04 µg·cm−2 FN). A higher content of styrene as the more hydrophobic polymer component enhanced protein binding, which suggests a contribution of hydrophobic interactions despite the particles exhibiting strongly negatively charged surfaces with zeta potentials of −44 to −52 mV. The quantities of adsorbed proteins were estimated to correspond to a confluent surface coverage. Overall, this study illustrated how protein binding can be controlled by systematically varying the nanoparticle bulk composition and may serve as a basis for establishing interfaces with a targeted level of protein retention and/or presentation.
A távoktatásos hallgatók véleménye a főiskoláról
Creators: name: Domán, Szilvia
name: Radó, András
name: Réthy, István
name: Tamus, Antalné
name: Domán, Szilvia
name: Radó, András
name: Réthy, István
name: Tamus, Antalné
Publisher: name: Unknown
Year: 2004
Subjects: Teaching/Communication/Extension/Profession

description: A Károly Róbert Főiskola vezetése szükségesnek látja, hogy ismerje hallgatóinak véleményét, elégedettségét az intézmény oktató munkájának színvonaláról. Ennek érdekében 1700 fő véleményét tükröző primer jellegű kutatásra került sor 2002-ben, a távoktatási tagozaton tanuló hallgatók körében. A kutatás eredményei alátámasztják azt az örvendetes tényt, hogy a távoktatásos hallgatók véleménye a Főiskoláról igen kedvező. Kiemelkedő fontosságúnak tartjuk ennek intenzív kommunikálását, mind a belső, mind a külső PR célcsoportok felé. Javasoljuk a hasonló felmérések időszakos megismétlését. Ugyanakkor indokoltnak tartjuk, hogy a felmerült hiányosságok kiküszöbölésére intézkedések történjenek. Véleményünk szerint a felsőoktatási intézmények erős versenyében folyamatos újításokkal, fejlesztésekkel, további színvonalnöveléssel tartható csak meg a Főiskola kedvező pozíciója, illetve megítélése. ---------------- The management of the Charles Robert College considers important to know their students9 opinion of the level of the educational work of the College, and their satisfaction with it. Therefore a primary Investigation was carried out in 2002 reflecting the opinion of 1700 students of the Faculty of Distant Teaching. Results obtained have proved the pleasing fact that the distant teaching participants9 opinion of the college is very positive. The management considers extremely important to intensively communicate this fact with both internal and external PR target groups. They recommend to repeatedly carry out surveys of this kind from time to time. At the same time, they consider necessary to take measures in order to eliminate deficiencies detected. To the management’s opinion, under the conditions of the prevailing hard competition among institutions of higher education, the favourable position and judgement of the College can only be kept by means of continuous innovation, development, and further improvement of the quality of education.
Mott law as lower bound for a random walk in a random environment
Creators: name: Faggionato, A.
name: Schulz-Baldes, H.
name: Spehner, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider a random walk on the support of a stationary simple point process on $R^d$, $d\geq 2$ which satisfies a mixing condition w.r.t.the translations or has a strictly positive density uniformly on large enough cubes. Furthermore the point process is furnished with independent random bounded energy marks. The transition rates of the random walk decay exponentially in the jump distances and depend on the energies through a factor of the Boltzmann-type. This is an effective model for the phonon-induced hopping of electrons in disordered solids within the regime of strong Anderson localization. We show that the rescaled random walk converges to a Brownian motion whose diffusion coefficient is bounded below by Mott's law for the variable range hopping conductivity at zero frequency. The proof of the lower bound involves estimates for the supercritical regime of an associated site percolation problem.
Sense of belonging among first-year physics students in Germany : exploring intergroup differences and correlations
Creators: name: Feser, Markus Sebastian
name: Haak, Inka
name: Rabe, Thorid
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 371

description: Within the present study, we investigated first-year physics students’ senses of belonging to physics and to their university given different backgrounds and prerequisites. Moreover, we explored whether, and to what extent, these two senses of belonging relate to characteristics that curtail students’ academic success and impact the dropout rate from physics programs. For this purpose, we conducted a voluntary, anonymous online survey at 20 universities in Germany. A total of 238 first-year physics students participated. The results of the present study not only align with those of previous research (e.g., the correlative results) but also extend the current state of research (e.g., the revealed intergroup differences) and provide starting points for future research. Conclusions are drawn from these results at the end of the paper.
Transcriptional impact of EGFR activation in human female vascular smooth muscle cells
Creators: name: Dubourg, Virginie
name: Schwerdt, Gerald
name: Schreier, Barbara
name: Kopf, Michael
name: Mildenberger, Sigrid
name: Benndorf, Ralf
name: Gekle, Michael
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Vascular smooth muscle cells (VSMC) are critical for the vascular tone, but they can also drive the development of vascular diseases when they lose their contractile phenotype and de-differentiate. Previous studies showed that the epidermal growth factor receptor (EGFR) of VSMC is critical for vascular health, but most of the underlying mechanisms by which VSMC-EGFR controls vascular fate have remained unknown. We combined RNA-sequencing and bioinformatics analysis to characterize the effect of EGFR-activation on the transcriptome of human primary VSMC (from different female donors) and to identify potentially affected cellular processes. Our results indicate that the activation of human VSMC-EGFR is sufficient to trigger a phenotypical switch toward a proliferative and inflammatory phenotype. The extent of this effect is nonetheless partly donor-dependent. Our hypothesis-generating study thus provides a first insight into mechanisms that could partly explain variable susceptibilities to vascular diseases in between individuals.
Superconducting tetrahedral quantum bits
Creators: name: Feigel'man, M. V.
name: Ioffe, L. B.
name: Geshkenbein, V. B.
name: Dayal, P.
name: Blatter, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new design for a quantum bit with four superconducting islands in the topology of a symmetric tetrahedron, uniformly frustrated with one-half flux-quantum per loop and one-half Cooper-pair per island. This structure emulates a noise-resistant spin-1/2 system in a vanishing magnetic field. The tetrahedral quantum bit combines a number of advances such as a doubly degeneracy ground state minimizing decoherence via phonon radiation, a weak quadratic sensitivity to electric and magnetic noise, relieved constraints on the junction fabrication, a large freedom in manipulation, and attractive measurement schemes. The simultaneous appearance of a degenerate ground state and a weak noise sensitivity are consequences of the tetrahedral symmetry, while enhanced quantum fluctuations derive from the special magnetic frustration. We determine the spectral properties of the tetrahedral structure within a semiclassical analysis and confirm the results numerically. We show how proper tuning of the charge-frustration selects a doubly degenerate ground state and discuss the qubit's manipulation through capacitive and inductive coupling to external bias sources. The complete readout of all the spin-components is achieved through coupling of the internal qubit currents to external junctions driven close to criticality during the measurement.
description: 16 pages, 7 figures
Parity measurement of one- and two-electron double well systems
Creators: name: Stace, T. M.
name: Barrett, S. D.
name: Goan, H. -S.
name: Milburn, G. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We outline a scheme to accomplish measurements of a solid state double well system (DWS) with both one and two electrons in non-localised bases. We show that, for a single particle, measuring the local charge distribution at the midpoint of a DWS using an SET as a sensitive electrometer amounts to performing a projective measurement in the parity (symmetric/antisymmetric) eigenbasis. For two-electrons in a DWS, a similar configuration of SET results in close-to-projective measurement in the singlet/triplet basis. We analyse the sensitivity of the scheme to asymmetry in the SET position for some experimentally relevant parameter, and show that it is realisable in experiment.
description: 18 Pages, to appear in PRB
Seasons of my life
Creators: name: Carroll, Sheila Mary
Publisher: name: University of British Columbia
Year: 2010

description: My research is a creative text of lived experiences, which will highlight unique thought processes, in that they are my own. I have studied and reacted to some of the ideas of scholars of phenomenology, feminist thought, post-modern and structuralist ideas, literary and curriculum theory, and to the techniques of creative writers whose work I admire. It includes vignettes or snapshots of happenings captured in prose or in my recent attempts at poetry. The truth is that I have always wanted to be a writer, and that I have always written, but not for publication. In Part One of “The Rustle of Language” Barthes (1986) discusses the idea that the verb "to write" is intransitive; it is something a writer does. I have written in journals, in letters, in daybooks, in essays and in notes to myself on my readings, and I can see change. As Barthes says, "the one who writes I is not the same as the I read by you" (p. 17), and it is very different from the “I” writing now, of the past. I include all seasons of my life using the introductory poems as an overview, as an introduction to how I see myself now as I must have been then. My love for ballet and for the video I have of the National Ballet of Canada dancing The Four Seasons to Vivaldi’s score have been my inspiration. I expect that as I proceed, I shall add some references and delete others. As in all creative writing, it is difficult to tell exactly where my research and writing will take me. At this time I would like to concentrate on just one basic idea, which has been stated succinctly by van Manen (2002) in Phenomenology Online when he says, "phenomenological inquiry-writing is based on the idea that no text is ever perfect, no interpretation is ever complete, no explication of meaning is ever final, no insight is beyond challenge" (p. 1).
The production rate of the coarse grained Gibbs entropy and the Kolmogorov-Sinai entropy: a real connection ?
Creators: name: Falcioni, Massimo
name: Palatella, Luigi
name: Vulpiani, Angelo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We discuss the connection between the Kolmogorov-Sinai entropy, $h_{KS}$, and the production rate of the coarse grained Gibbs entropy, $r_G$. Detailed numerical computations show that the (often accepted) identification of the two quantities does not hold in systems with intermittent behavior and/or very different characteristic times and in systems presenting pseudo-chaos. The basic reason of this fact is in the asymptotic (with respect to time) nature of $h_{KS}$, while $r_G$ is a quantity related to short time features of a system.
description: 8 pages, 5 figures Submitted to PRE
Compactification, T-Duality and Quantum Erasers
Creators: name: Wani, Salman Sajad
name: Sutherland, Dylan
name: Pourhassan, Behnam
name: Faizal, Mir
name: Patel, Hrishikesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using T-duality, we will argue that a zero point length exists in the low energy effective field theory of string theory on compactified extra dimensions. Furthermore, if we neglect the oscillator modes, this zero point length would modify low quantum mechanical systems. As this zero length is fixed geometrically, it is important to analyze how it modifies purely quantum mechanical effects. Thus, we will analyze its effects on quantum erasers, because they are based on quantum effects like entanglement. It will be observed that the behavior of these quantum erasers gets modified by this zero point length. As the zero point length is fixed by the radius of compactification, we argue that these results demonstrate a deeper connection between geometry and quantum effects.
description: 14 pages, 4 figures
Collisional cross sections and momentum distributions in astrophysical plasmas: dynamics and statistical mechanics link
Creators: name: Ferro, Fabrizio
name: Quarati, Piero
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that, in stellar core plasmas, the one-body momentum distribution function is strongly dependent, at least in the high velocity regime, on the microscopic dynamics of ion elastic collisions and therefore on the effective collisional cross sections, if a random force field is present. We take into account two cross sections describing ion-dipole and ion-ion screened interactions. Furthermore we introduce a third unusual cross section, to link statistical distributions and a quantum effect originated by the energy-momentum uncertainty owing to many-body collisions, and propose a possible physical interpretation in terms of a tidal-like force. We show that each collisional cross section gives rise to a slight peculiar correction on the Maxwellian momentum distribution function in a well defined velocity interval. We also find a possible link between microscopical dynamics of ions and statistical mechanics interpreting our results in the framework of non-extensive statistical mechanics.
description: 8 pages
A magyarországi agrárgazdaság vizsgálata
Creators: name: Marselek, Sándor
name: Wölcz, Andrea
name: Tégla, Zsolt
name: Marselek, Sándor
name: Wölcz, Andrea
name: Tégla, Zsolt
Publisher: name: Unknown
Year: 2004
Subjects: Agribusiness
Agricultural and Food Policy
Agricultural Finance

description: A mezőgazdaságban az elmúlt években kedvezőtlen tendenciák érvényesültek. Az ágazat beruházásai elmaradtak az indokolt mértéktől és romlott a jövedelmezőség. A gazdaságok jelentős adósságteherrel küszködtek és a természeti tényezők negatív hatása is rontotta az eredményeket. A mezőgazdasági tevékenység mellett végzett alternatív tevékenységek sem terjedtek kellően. Magyarországon jelentős területeken az ökoturizmus, gyógynövénytermesztés és -gyűjtés, termékfeldolgozás, csomagolás, értékesítés, népi iparművészet, az extenzív termelés, alternatív energiaforrások kiaknázása jelentősen hozzájárulhatnak a vidék eltartó képességének javításához. Célként tűzhető ki a mezőgazdaságból élők méltányos jövedelmének megteremtése; a versenyképes mezőgazdaság korszerű gazdasági, szervezeti és műszaki alapjainak kialakítása; az EU-ba való betagolódás után az onnan származó előnyök kihasználása. A munkaerő képzettségi szintjének javítása az egyik legfontosabb feladat a pályázati pénzek és EU források befogadása és célszerű felhasználása érdekében. --------------- Unfavourable trends have taken place in Hungary in recent years. Investments into the sector were lower than necessary, and profitability has decreased. Farms have considerably got into debt, and the negative impact of natural factors has also reduced their efficiency. Alternative activities carried out along with farming have not duly expanded either. However, there are large areas in Hungary where eco- touiism, drug plant farming and collecting, product processing, packaging and marketing, local handicraft, extensive production, and the exploitation of natural energy resources could considerably add to the supporting capacity of rural regions. Possible objectives are: to ensure due income for people making their living by farming; to lay the up-to-date economical, organisational and technical foundations of a competitive agriculture; and to exploit advantages deriving from EU membership after the entry of Hungary into the Union. One of the most important tasks is to raise the educational level of labour in order to duly accept and rationally use competition money and EU resources.
Hálózatok a gazdaságban
Creators: name: Dinya, László
name: Domán, Szilvia
name: Dinya, László
name: Domán, Szilvia
Publisher: name: Unknown
Year: 2004
Subjects: Agribusiness
Institutional and Behavioral Economics
Public Economics

description: A hálózati gazdaság fogalma az utóbbi évtizedben került előtérbe, de még számos tisztázatlan terminológiai és módszertani kérdés hátráltatja a terület kutatását. A gazdasági hálózat értelmezésén túl felvázoljuk a kutatások lehetséges újszerű szempontjait, különös tekintettel a spontán létrejött, komplex hálózatok létezésének diagnosztizálására, valamint e hálózatok általános működési elveinek gazdasági hálózatokban történő értelmezésére. Országos, illetve regionális adatokra támaszkodva statisztikailag kimutatjuk, hogy minél inkább érvényesülnek egy ágazatban (vagy régióban) a gazdasági szereplők tevékenységében az önszerveződés általános elvei, annál erősebb azok hálózati kapcsolatrendszere. A gazdasági szereplők hálózati pozícióját a foglalkoztatottak létszámával jellemezve kimutatjuk, hogy a hálózat egésze és annak részhálói is hasonló struktúrával rendelkeznek, azaz „fraktál-szerkezet” jellemzi azokat. Ezzel összhangban a kutatásunk célpontját képező élelmiszergazdaság hálózati struktúrája is régiónként hasonló, de eltérő a szereplők megoszlása, ami összefügg a hálózati kapcsolatok eltérő erősségével, illetőleg az iparági környezet általános fejlettségével. -------------- The notion of network economy has come to the front during the past decade, whereas there are still several terminological and methodological issues not cleared so far that hinder research in this field. In addition to the exact interpretation of the economic network, the possible new aspects of such research are outlined, with special regard to the diagnosis of the existence of complex networks having spontaneously come into being, and to the interpretation of the general principles of the function of networks in the field of economic networks. On the basis of national and regional data, the fact is statistically illustrated that the more the general principles of self-organisation assert themselves in the activities of operators within a sector (or region) the stronger their network connections are. It is demonstrated on the basis of the characterisation of the network position of operators by the number of persons employed that both a network and its parts have a similar structure, i. e. a "fractal structure” is characteristic of them. In accord with this the network structure of agro-business, which is the object of research, is also similar in different regions, whereas the distribution of operators is different, which is in relation with the different intensity of network connections, on the one hand, and with the general development of sectoral environment, on the other.
Genetic and morphological insights into the Carpobrotus hybrid complex around the world
Creators: name: Novoa, Ana
name: Hirsch, Heidi
name: Dini Pou Del Castillo, Lorena
name: Canavan, Susan
name: Gonzalez, Luis
name: Richardson, David M.
name: Pyšek, Petr
name: Rodriguez, Jonatan
name: Borges Silva, Lurdes
name: Brundu, Giuseppe
name: D'Antonio, Carla M.
name: Gutierrez, Jorge L.
name: Mathese, Megan
name: Levin, Sam
name: Silva, Luis
name: Roux, Johannes J.
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 590

description: The genus Carpobrotus N.E.Br. comprises between 12 and 25 species, most of which are native to South Africa. Some Carpobrotus species are considered among the most damaging invasive species in coastal dune systems worldwide. In their introduced areas, these species represent a serious threat to native species and significantly impact soil conditions and geochemical processes. Despite being well studied, the taxonomy of Carpobrotus remains problematic, as the genus comprises a complex of species that hybridize easily and are difficult to distinguish from each other. To explore the population genetic structure of invasive Carpobrotus species (i.e., C. acinaciformis and C. edulis) across a significant part of their native and non-native ranges, we sampled 40 populations across Argentina, Italy, New Zealand, Portugal, South Africa, Spain, and the USA. We developed taxon-specific microsatellite markers using a Next Generation Sequencing approach to analyze the population genetic structure and incidence of hybridization in native and non-native regions. We identified three genetically distinct clusters, which are present in both the native and non-native regions. Based on a set of selected morphological characteristics, we found no clear features to identify taxa morphologically. Our results suggest that the most probable sources of global introductions of Carpobrotus species are the Western Cape region of South Africa and the coastline of California. We suggest that management actions targeting Carpobrotus invasions globally should focus on preventing additional introductions from the east coast of South Africa, and on searching for prospective biocontrol agents in the Western Cape region of South Africa.
First-principles study on dielectric properties of NaCl crystal and ultrathin NaCl films under finite external electric field
Creators: name: Ono, Tomoya
name: Hirose, Kikuji
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a first-principles study on the dielectric properties of an NaCl crystal and ultrathin NaCl films under a finite external electric field. Our results show that the high-frequency dielectric constant of the films is not affected by the finite size effect from crystal surfaces and is close to that of the crystal, whereas the static one is sensitive to the thickness of the film due to the difference in the atomic configurations between the surface and inside of the film.
description: 11 pages and 4 figures
Peak Forecasting for Battery-based Energy Optimizations in Campus Microgrids
Creators: name: Soman, Akhil
name: Trivedi, Amee
name: Irwin, David
name: Kosanovic, Beka
name: McDaniel, Benjamin
name: Shenoy, Prashant
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Computers and Society (cs.CY)
subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Battery-based energy storage has emerged as an enabling technology for a variety of grid energy optimizations, such as peak shaving and cost arbitrage. A key component of battery-driven peak shaving optimizations is peak forecasting, which predicts the hours of the day that see the greatest demand. While there has been significant prior work on load forecasting, we argue that the problem of predicting periods where the demand peaks for individual consumers or micro-grids is more challenging than forecasting load at a grid scale. We propose a new model for peak forecasting, based on deep learning, that predicts the k hours of each day with the highest and lowest demand. We evaluate our approach using a two year trace from a real micro-grid of 156 buildings and show that it outperforms the state of the art load forecasting techniques adapted for peak predictions by 11-32%. When used for battery-based peak shaving, our model yields annual savings of $496,320 for a 4 MWhr battery for this micro-grid.
description: 5 pages. 4 figures, This paper will appear in the Proceedings of ACM International Conference on Future Energy Systems (e-Energy'20), June 2020
XMM-Newton observations of the eclipsing polar EP Dra
Creators: name: Ramsay, Gavin
name: Bridge, C. M.
name: Cropper, Mark
name: Mason, K. O.
name: Cordova, F. A.
name: Priedhorsky, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present XMM-Newton observations of the eclipsing polar EP Dra which cover nearly 3 binary orbital cycles. The X-ray and UV data show evidence for a prominent dip before the eclipse which is due to the accretion stream obscuring the accretion region. The dip ingress is rapid in hard X-rays suggesting there is a highly collimated core of absorption. We find that a different level of absorption column density is required to match the observed count rates in different energy bands. We propose that this is due to the fact that different absorption components should be used to model the reprocessed X-rays, the shocked X-ray component and the UV emission and explore the affect that this has on the resulting fits to the spectrum. Further, there is evidence that absorption starts to obscure the softer X-rays shortly after the onset of the bright phase. This suggests that material is threaded by an unusually wide range of magnetic field lines, consistent with the suggestion of Bridge et al. We find that the period is slightly greater than that determined by Schwope & Mengel.
description: Accepted for publication MNRAS, 6 pages
Body composition parameters predict survival in pancreatic cancer : a retrospective multicenter analysis
Creators: name: Damm, Marko
name: Efremov, Ljupcho
name: Jalal, Mustafa
name: Nadeem, Nabeegh
name: Dober, Johannes
name: Michl, Patrick
name: Wohlgemuth, Walter A.
name: Wadsley, Jonathan
name: Hopper, Andrew D.
name: Krug, Sebastian
name: Rosendahl, Jonas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Background: Parameters to adapt individual treatment strategies for patients with pancreatic ductal adenocarcinoma (PDAC) are urgently needed. The present study aimed to evaluate body composition parameters as predictors of overall survival (OS) in PDAC patients. Methods: Measurements of body composition parameters were performed on computed tomography scans at diagnosis. Height-standardized and Body Mass Index- and sex-adjusted regression formulas deriving cut-offs from a healthy population were used. The Kaplan-Meier method with the log-rank test was performed for survival analysis. Independent prognostic factors were identified with uni- and multivariable Cox regression analyses. Results: In total, 354 patients were analyzed. In a multivariable Cox model, besides tumor stage and resection status, only myosteatosis (HR 1.53; 95% CI 1.10–2.14, p = 0.01) was an independent prognostic factor of OS among body composition parameters. Subgroup analyses revealed that the prognostic impact of myosteatosis was higher in patients ≤68 years of age, with advanced tumor stages and patients without curative intended resection. Conclusions: The analysis of one of the largest Caucasian cohorts to date, demonstrated myosteatosis to be an independent prognostic factor of OS in PDAC. To improve outcomes, prospective trials aiming to investigate the utility of an early assessment of myosteatosis with subsequent intervention by dieticians, sports medicine physicians, and physiotherapists are warranted.
Residual diagnostics for cross-section time series regression models
Creators: name: Baum, Christopher F.
name: Baum, Christopher F.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Research Methods/ Statistical Methods
subject: fixed effects
subject: groupwise heteroskedasticity
subject: contemporaneous correlation

description: These routines support the diagnosis of groupwise heteroskedasticity and cross-sectional correlation in the context of a regression model fit to pooled cross-section time series (xt) data.
Recent Advances in Unconventional Density Waves
Creators: name: Dóra, Balázs
name: Maki, Kazumi
name: Virosztek, Attila
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Unconventional density wave (UDW) has been speculated as a possible electronic ground state in excitonic insulator in 1968. Recent surge of interest in UDW is partly due to the proposal that the pseudogap phase in high T_c cuprate superconductors is d-wave density wave (d-DW). Here we review our recent works on UDW within the framework of mean field theory. In particular we have shown that many properties of the low temperature phase (LTP) in alpha-(BEDT-TTF)_2MHg(SCN)_4 with M=K, Rb and Tl are well characterized in terms of unconventional charge density wave (UCDW). In this identification the Landau quantization of the quasiparticle motion in a magnetic field (the Nersesyan effect) plays the crucial role. Indeed the angular dependent magnetoresistance and the negative giant Nernst effect are two hallmarks of UDW.
description: 18 pages, 12 figures
Boson-Fermion Resonance Model in One Dimension
Creators: name: Recati, A.
name: Fuchs, J. N.
name: Zwerger, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss the BCS-BEC crossover for one-dimensional spin 1/2 fermions at zero temperature using the Boson-Fermion resonance model in one dimension. We show that in the limit of a broad resonance, this model is equivalent to an exactly solvable single channel model, the so-called modified Gaudin-Yang model. We argue that the one-dimensional crossover may be realized either via the combination of a Feshbach resonance and a confinement induced resonance or using direct photo-association in a two-component Fermi gas with effectively one-dimensional dynamics. In both cases, the system may be driven from a BCS-like state through a molecular Tonks-Girardeau gas close to resonance to a weakly interacting Bose gas of dimers.
description: 8 pages, 2 figures. The analysis in the present manuscript is related to what is discussed in Phys. Rev. Lett. 93, 090405 (2004) and Phys. Rev. Lett. 93, 090408 (2004)
Generalized Lorenz curves and related graphs: an update for Stata 7
Creators: name: Van Kerm, Philippe
name: Jenkins, Stephen P.
name: Van Kerm, Philippe
name: Jenkins, Stephen P.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Research Methods/ Statistical Methods
subject: generalized Lorenz curves

description: The glcurve command is updated to a Stata 7 version, glcurve7, which is described and illustrated.
Extending Trinity to the Scalar Sector through Discrete Flavoured Symmetries
Creators: name: Alves, João M.
name: Botella, Francisco J.
name: Branco, Gustavo C.
name: Nebot, Miguel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We conjecture the existence of a relation between elementary scalars and fermions, making it plausible the existence of three Higgs doublets. We introduce a Trinity Principle (TP) which, given the fact that there are no massless quarks, requires the existence of a minimum of three Higgs doublets. The TP states that each line of the mass matrix of a quark of a given charge should receive the contribution from one and only one scalar doublet and furthermore a given scalar doublet should contribute to one and only one line of the mass matrix of a quark of a given charge. This principle is analogous to the Natural Flavour Conservation (NFC) of Glashow and Weinberg with the key distinction that NFC required the introduction of a flavour blind symmetry, while the TP requires a flavoured symmetry, to be implemented in a natural way. We provide two examples which satisfy the Trinity Principle based on $\mathbb{Z}_3$ and $\mathbb{Z}_2\times\mathbb{Z}_2'$ flavoured symmetries, and show that they are the minimal multi-Higgs extensions of the Standard Model where CP can be imposed as a symmetry of the full Lagrangian and broken by the vacuum, without requiring soft-breaking terms. We show that the vacuum phases are sufficient to generate a complex CKM matrix, in agreement with experiment. The above mentioned flavoured symmetries lead to a strong reduction in the number of parameters in the Yukawa interactions, enabling a control of the Scalar Flavour Changing Neutral Couplings (SFCNC). We analyse some of the other physical implications of the two models, including an estimate of the enhancement of the Baryon Asymmetry of the Universe provided by the new sources of CP violation, and a discussion of the the strength of their tree-level SFCNC.
description: 24 pages
Additional file 3 of Association between parent and child physical activity: a systematic review
Creators: name: Petersen, Therese Lockenwitz
name: Møller, Liselotte Bang
name: Brønd, Jan Christian
name: Jepsen, Randi
name: Grøntved, Anders
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: Additional file 3. Modified ROBINS-I tool.
Beryllium in turnoff stars of NGC6397: early Galaxy spallation, cosmochronology and cluster formation
Creators: name: Pasquini, L.
name: Bonifacio, P.
name: Randich, S.
name: Galli, D.
name: Gratton, R. G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first detection of beryllium in two turnoff stars of the old, metal-poor globular cluster NGC 6397. The beryllium lines are clearly detected and we determine a mean beryllium abundance of log(Be/H)=-12.35 +/- 0.2. The beryllium abundance is very similar to that of field stars of similar Fe content. We interpret the beryllium abundance observed as the result of primary spallation of cosmic rays acting on a Galactic scale, showing that beryllium can be used as a powerful cosmochronometer for the first stellar generations. With this method, we estimate that the cluster formed 0.2-0.3 Gyr after the onset of star formation in the Galaxy, in excellent agreement with the age derived from main sequence fitting. From the same spectra we also find low O (noticeably different for the two stars) and high N abundances, suggesting that the original gas was enriched in CNO processed material. Our beryllium results, together with the N, O, and Li abundances, provide insights on the formation of this globular cluster, showing that any CNO processing of the gas must have occurred in the protocluster cloud before the formation of the stars we observe now. We encounter, however, difficulties in giving a fully consistent picture of the cluster formation, able to explain the complex overall abundance pattern.
description: to appear in A&A
Art as a representation of children’s learning experiences : a Reggio Emilia inspired study
Creators: name: Kim, Bo Sun
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to explore how children construct their knowledge using art as a learning and knowledge representation tool in the course of carrying out a project. In particular, this study was conducted in a Reggio inspired Canadian child care classroom in order to examine how the fundamental principles of the Reggio Emilia are implemented within a Canadian context. Qualitative case study methodology was employed to investigate children’s knowledge-building processes and their knowledge representation. The study focused on the in-depth study of six children’s activities during a ’Shades of Pink’ project. For this study, the process of children’s knowledge-building was documented. Through documenting this project, Shades of Pink, children’s own ideas and theories were discovered; children’s discussions were traced; and children’s multiple forms of representations were presented. This case study provides insight into the way the children construct knowledge. The project was first initiated because of children’s interest in mixing paints. In the collaboration with their teacher, the children developed the project into a meaningful context for learning. The children constructed hypotheses, tested their theories, and exchanged thoughts with their peers and the teacher in order to build knowledge. Through this process, the children constructed at least two different kinds of knowledge (a) social understanding/relationships, and (b) content knowledge. The children’s knowledge building processes are evident in the pedagogical documentation that was kept, including children’s conversations, teacher’s comments, pictures of children’s work, and pictures of children working. Pedagogical documentation played an important role in children’s learning in terms of (a) promoting parents’ involvement in children’s learning, (b) enhancing children’s learning, (c) helping the teacher plan and evaluate children and (d) making children’s learning visible.
Reliable estimation of generalized linear mixed models using adaptive quadrature
Creators: name: Rabe-Hesketh, Sophia
name: Skrondal, Anders
name: Pickles, Andrew
name: Rabe-Hesketh, Sophia
name: Skrondal, Anders
name: Pickles, Andrew
Publisher: name: Unknown
Year: 2002
Subjects: subject: Research Methods/ Statistical Methods
subject: adaptive quadrature
subject: gllamm
subject: generalized linear mixed models
subject: random-effects models
subject: panel data
subject: numerical integration
subject: adaptive integration
subject: multilevel models
subject: clustered data

description: Generalized linear mixed models or multilevel regression models have become increasingly popular. Several methods have been proposed for estimating such models. However, to date there is no single method that can be assumed to work well in all circumstances in terms of both parameter recovery and computational efficiency. Stata’s xt commands for two-level generalized linear mixed models (e.g., xtlogit) employ Gauss–Hermite quadrature to evaluate and maximize the marginal log likelihood. The method generally works very well, and often better than common contenders such as MQL and PQL, but there are cases where quadrature performs poorly. Adaptive quadrature has been suggested to overcome these problems in the two-level case. We have recently implemented a multilevel version of this method in gllamm, a program that fits a large class of multilevel latent variable models including multilevel generalized linear mixed models. As far as we know, this is the first time that adaptive quadrature has been proposed for multilevel models. We show that adaptive quadrature works well in problems where ordinary quadrature fails. Furthermore, even when ordinary quadrature works, adaptive quadrature is often computationally more efficient since it requires fewer quadrature points to achieve the same precision.
Unkept : promises, secrets, and perils within dietetic education and practice
Creators: name: Gingras, Jacqueline Rochelle
Publisher: name: University of British Columbia
Year: 2010

description: This research is concerned with dietitians' experiences of education and practice, which together constitute dietitian identity. The author, herself a dietitian and dietetic educator, recruited twelve female dietitians to participate in individual interviews and collaborative workshops where they shared their ' experiences and reflections on the themes of the research. This dissertation is arranged in three panels to achieve multiple perspectives on the research findings. The first panel explores the potential of using reflexive autoethnography as a research method. The second panel enacts an autoethnographic tale emphasizing the complexities of dietetic education and practice. The third panel is an academic rendering of the research that posits a theory of dietitian performativity. Arranging the findings as a textual triptych protracts the complex interplay of the research themes. In particular, participants enter the profession sustained by promises of being able to make a difference in the lives of others with respect to nutritional health. Dietetic practice comes to be understood as performative through a series of uncontested, repetitive acts. In the mode of dietitian performativity, dietitians' lived realities are sometimes found to be discontinuous from promises of professionalism. Dietetic education, while not considered solely responsible for generating these promises, might operate to sustain or amplify their effects. Dietitians' passion for dietetics is open to question when performativities are found discrepant from promises. Profoundly melancholic expressions are associated with dietitians' inability to engage in liberatory practice, despite believing such practices were achievable. Melancholia instigated dietitians' desire to leave the profession. An imagined, embodied curriculum depicting what might result if dietetic students, educators, and practitioners acknowledge the relationality, emotionality, and promises of their profession is offered in response. The author calls for a renegotiation of what counts as knowledge in dietetic education through the asking of "Who am I?" In posing this question, the dietitian engages in a reflexive turn towards self-recognition such that 'doing' (performativity) emerges from 'being' (identity) and potentially nutrition discourse expands. Dietitian performativity initiated through critical social discourse begs the question of what it means to be human while endeavouring to embrace the joys, complexities, and contradictions that are dietetic education and practice.
Additional file 2 of Association between parent and child physical activity: a systematic review
Creators: name: Petersen, Therese Lockenwitz
name: Møller, Liselotte Bang
name: Brønd, Jan Christian
name: Jepsen, Randi
name: Grøntved, Anders
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: Additional file 2. Search strategy.