cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mechanisms of molecular switching in the Wnt signal transduction pathway
Creators: name: Flack, Joshua Edwin
Publisher: name: Apollo - University of Cambridge Repository
Year: 2018
Subjects: Wnt signalling
cell signalling
ubiquitin ligase
ubr5
colorectal cancer
Nkd1

description: Wnt signalling is a critical cellular communication pathway controlling cell fate in all metazoan organisms. Timely activation of this pathway is crucial to coordinate development, control homeostasis of adult tissues, and to avoid cancer. Wnt signal transduction depends primarily on the activities of three multiprotein complexes; the ‘degradasome’, which targets the central effector β-catenin for degradation in the absence of Wnt; the ‘signalosome’, which is assembled by Dishevelled upon Wnt-receptor binding to inactivate the degradasome, thus allowing β-catenin to accumulate; and the ‘enhanceosome’, which captures β-catenin, granting it access to target genes and relieving their transcriptional repression by Gro/TLE. Many of the components of these complexes have now been identified, but details of their regulation, and in particular the mechanisms by which they are switched on and off, remain poorly understood. The majority of this thesis is concerned with the mechanism by which β-catenin relieves the transcriptional repression imposed upon Wnt target genes, and thereby activates the Wnt ‘transcriptional switch’. In Chapter 2, I present data showing that apposition of Gro/TLE and UBR5, a HECT E3 ubiquitin ligase, by β-catenin promotes Gro/TLE ubiquitylation, earmarking it for extraction by the VCP/p97 ATPase and ultimately leading to inactivation of its repressive function. In Chapter 3, I present the results of a different, ongoing study to identify the mechanism by which a cytoplasmic negative regulator, Naked, acts to interfere with the function of Dishevelled, promoting the switching of signalosomes and the termination of canonical Wnt signalling. These findings advance our understanding of the mechanisms by which the Wnt signalling pathway is switched on and off, and suggest new targets for therapeutic intervention in Wnt- driven cancers.
Price linkage between milling and feed wheat prices in Poland and Germany
Creators: name: Hamulczuk, Mariusz
name: Łopaciuk, Wiesław
name: Hamulczuk, Mariusz
name: Łopaciuk, Wiesław
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Research Methods/ Statistical Methods
subject: wheat prices
subject: price transmission
subject: cointegration
subject: VECM models

description: The aim of the paper was to analyse spatial price transmission in the wheat market in Poland and Germany. The analysis was conducted with the use of weekly milling and feed wheat price series and cointegration framework. The results confirm high linkage between prices in Poland and Germany as well as allow us to identify Germany as the price-leading market. However, as the self-sufficiency in the German wheat market has deteriorated, there are signals of growing importance of the Polish market in the milling wheat price formation.
title: 03_0306
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Experimental observation of high field diamagnetic fluctuations in Niobium
Creators: name: Salem-Sugui,, S.
name: Friesen, Mark
name: Alvarenga, A. D.
name: Gandra, F. G.
name: Doria, M. M.
name: Schilling, O. F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have performed a magnetic study of a bulk metallic sample of Nb with critical temperature $T_{c}=8.5$ K. Magnetization versus temperature (M {\it vs} T) data obtained for fixed magnetic fields above 1 kOe show a superconducting transition which becomes broader as the field is increased. The data are interpreted in terms of the diamagnetic lowest Landau level (LLL) fluctuation theory. The scaling analysis gives values of the superconducting transition temperature $T_{c}(H)$ consistent with $H_{c2}(T)$% . We search for universal 3D LLL behavior by comparing scaling results for Nb and YBaCuO, but obtain no evidence for universality.
description: 5 pages, 6 figures, Accepted for publication in Phys.Rev. B
Josephson Current through a correlated quantum level: Andreev states and Pi-junction behavior
Creators: name: Vecino, E.
name: Martin-Rodero, A.
name: Yeyati, A. Levy
Publisher: name: arXiv
Year: 2002
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The Josephson transport and the electronic properties of a quantum dot characterized by a single level coupled to superconducting leads is analyzed. Different approximations are used and compared: the mean field approximation, the second order perturbation theory in the Coulomb interaction and the exact diagonalization in the zero band-width limit. The system exhibits a rich behavior as a function of the relevant parameters. We discuss in detail the conditions for the observation of Pi-junction behavior and the effect of Coulomb interactions on the Andreev states.
Evaluation of the Impact of Trade Liberalization on Food Crop Production and Farm Income in Lowland Java, Indonesia
Creators: name: Gérard, F.
name: Marty, Isabelle
name: Erwidodo
name: Gérard, F.
name: Marty, Isabelle
name: Erwidodo
Publisher: name: Unknown
Year: 1997
Subjects: Crop Production/Industries
Farm Management
International Relations/Trade

description: Since the mid-1980s, the Indonesian economy has been progressively liberalized, following a self-adjustment process after the drop in oil prices. Despite these adverse circumstances the country managed to maintain rapid economic growth, as it had since the end of the 1960s. The agricultural sector has contributed to the dynamism of the economy. Both BULOG (the national foodcrop agency) and the Ministry of Agriculture have played a major role in that success, providing a stable environment for producers and consumers through use of various policy instruments, promoting adoption of new varieties and techniques for growing crops, and providing subsidized inputs. By maintaining rice price stability on domestic markets, BULOG, since 1967, has diminished some of the risk associated with agricultural activities and contributed to social stability by isolating consumers from sharp fluctuations in staple food prices. The importance of market regulation for the welfare of the poor is well known (Newberry, 1989; Timmer, 1992). With the intensification of international negotiations on trade liberalization, further deregulation of the agricultural sector is probable and there is an urgent need to assess the consequences both for national production and for farm income. These issues will be discussed using a micro-macro approach. The methodology is described first, the Indonesian context is then reviewed and the results of various simulations are described and analysed.
Quantifying the impacts of wildfires on forest carbon stocks and CO2 emissions across Brazilian Amazonia
Creators: name: Silva, Camila
Publisher: name: Lancaster University
Year: 2021
Subjects: HUMID TROPICAL FORESTS
Amazonia
carbon stocks
fire
tree mortality
post-fire regrowth
CO2 emissions

description: Drought-induced wildfires are an increasing threat to tropical forests. More frequent and intense droughts combined with increasing anthropogenic disturbances are converting previously fire-resistant humid forests into fire-prone ecosystems. Understanding the impacts of wildfires in tropical forests is critical to maintain the vital role of tropical forests in regulating climate and supporting human wellbeing. However, the long-term effects of wildfires on forest carbon stocks and emissions are still poorly understood. This thesis addresses this knowledge gap by investigating fire-induced changes across 63 Amazonian forest plots and quantifying associated carbon emissions. I first assessed long-term changes in biomass stocks and dynamics among tree functional groups (chapter 2), showing that a 25% reduction in carbon stocks persists for at least 30 years after wildfires. Losses outweighed carbon gains in the short- term (1-8 years), but although the carbon balance returned to baseline levels over the long-term carbon stocks had not recovered to pre-fire levels, even after 30 years. In chapter 3, I quantified year-to-year net CO2 emissions from burned forests, based on changes in stem mortality, decomposition and vegetation growth. The models I proposed showed that following combustion emissions, a large pulse of carbon is released to the atmosphere through decomposition, peaking at c. 5 years after the fires, which was responsible for up to 73% of all fire-induced emissions over the 30-year period. Post-fire regrowth only offset 35% of all fire- induced carbon emissions. Finally, my spatio-temporal approach to scale-up immediate and long-term CO2 emissions from wildfires in chapter 4 showed that the greatest combustion and decomposition emissions occur in forests with the highest biomass. Overall, this thesis demonstrates that the effects of fire on forest carbon stocks persist for many years and that environmental policies should focus on tackling wildfires in the humid tropics, especially where forests are hyper carbon-rich.
The Environmental History of the National Grid The Process of Electrification: Infrastructure and Influence
Creators: name: Button, Katherine Shillabeer
Publisher: name: Apollo - University of Cambridge Repository
Year: 2018
Subjects: Environmental history
British Electrification
Electrification
Infrastructure

description: British electrification began in the 1880s but it was the late 1920s before the ‘GridIron’ was constructed providing the capacity for uniformly accessible electricity. This enabled electricity to touch people's lives in the intimacy of their own homes, and provided cheaper electricity to workplaces, causing a shift from local suppliers to national coordination. Consequences for pollution, its visual impact on rural and urban landscapes, and an unparalleled and rapid intrusion on property rights were considered at the time. It was these effects that were the most controversial, although the damage through fossil fuels was arguably much greater with hindsight. The provision of electricity across the whole country took decades and was subject to exogenous pressures and was influenced by individuals, institutions and innovations. Electrification generally, and the Grid in particular has received scant attention from historians, especially regarding its environmental and social impacts and the fuel it consumed. This work tells the story of electricity as a commodity; initially sold by hundreds of individual companies operating generating stations providing a local electrical supply, and how this slowly transformed into a nationally coordinated system. The Grid, a vast network of towers and cables, transmitted bulk electricity generated by large power stations burning enormous quantities of coal. This work considers how this affected the environments in which people lived and worked and how these changes impacted the ‘natural’ environment. This work has only just begun to explore the changes that electricity brought spatially and how it impacted lifestyles and working methods. It explores how change was negotiated by actors and considers ‘unintentional conservation’, brought about by a drive to continuously improve efficiency and which occurred before the need for such environmental protection was well understood.
description: Funded by the AHRC
Astrometric and photometric study of NGC 6067, NGC 2506 and IC 4651 open clusters based on wide-field ground and Gaia DR2 data
Creators: name: Rangwal, Geeta
name: Yadav, R. K. S.
name: Durgapal, Alok
name: Bisht, D.
name: Nardiello, D.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an analysis of three southern open star clusters NGC 6067, NGC 2506 and IC 4651 using wide-field photometric and Gaia DR2 astrometric data. They are poorly studied clusters. We took advantage of the synergy between Gaia DR2 high precision astrometric measurements and ground based wide-field photometry to isolate cluster members and further study these clusters. We identify the cluster members using proper motions, parallax and colour-magnitude diagrams. Mean proper motion of the clusters in RA and DEC is estimated as -1.90 \pm 0.01 and -2.57 \pm 0.01 mas/yr for NGC 6067, -2.57 \pm 0.01 and 3.92 \pm 0.01 mas/yr for NGC 2506 and -2.41 \pm 0.01 and -5.05 \pm 0.02 mas/yr for IC 4651. Distances are estimated as 3.01 \pm 0.87, 3.88 \pm 0.42 and 1.00 \pm 0.08 kpc for the clusters NGC 6067, NGC 2506 and IC 4651 respectively using parallaxes taken from Gaia DR2 catalogue. Galactic orbits are determined for these clusters using Galactic potential models.We find that these clusters have circular orbits. Cluster radii are determined as 10 arcmin for NGC 6067, 12 arcmin for NGC 2506 and 11 arcmin for IC 4651. Ages of the clusters estimated by isochrones fitting are 66 \pm 8 Myr, 2.09 \pm 0.14 Gyr and 1.59 \pm 0.14 Gyr for NGC 6067, NGC 2506 and IC 4651 respectively. Mass function slope for the entire region of cluster NGC 2506 is found to be comparable with the Salpeter value in the mass range 0.77 - 1.54 Solar mass. The mass function analysis shows that the slope becomes flat when one goes from halo to core region in all the three clusters. A comparison of dynamical age with cluster's age indicates that NGC 2506 and IC 4651 are dynamically relaxed clusters.
description: 15 pages, 18 figures, The article is accepted for publication in MNRAS
Environmental and economic impacts of growing certified organic coffee in Colombia
Creators: name: Ibanez, Marcela
name: Blackmann, Allen
name: Ibanez, Marcela
name: Blackmann, Allen
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Risk and Uncertainty
subject: organic certification
subject: coffee
subject: Colombia
subject: difference-in-differences matching

description: According to advocates, eco-certification can improve developing country farmers’ environmental and economic performance. However, these notional benefits can be undercut by self-selection: the tendency of relatively wealthy farmers already meeting eco-certification standards to disproportionately participate. Empirical evidence on this matter is scarce. Using original farm-level survey data along with matching and difference-in-differences matching models, we analyze the producer-level effects of organic coffee certification in southeast Colombia. We find that certification improves coffee growers’ environmental performance. It significantly reduces sewage disposal in the fields and increases the adoption of organic fertilizer. However, we are not able to discern economic benefits.
The Impact of External and Internal Factors on Strategic Management Practices of Agribusiness Firms in Tanzania
Creators: name: Dominic, Theresia
name: Theuvsen, Ludwig
name: Dominic, Theresia
name: Theuvsen, Ludwig
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Marketing
subject: FOS: Economics and business
subject: strategic management practices
subject: agribusiness
subject: structural modelling
subject: Tanzania

description: All firms need to work out strategic plans to exploit the existing market, but they differ in their capacity to implement and manage strategies. Considering the industrial organization and resource-based views in the strategic management literature, we understand that firm attributes, resources and external environmental factors are critical links to strategic practices. With regard to African agribusiness firms, there is scant research on how these factors determine the successful application of strategic management practices. Therefore, this study uses empirical data from 229 agribusiness firms in Tanzania to obtain insights into the determinants of their choice of strategic management practices. The results show significantly that better strategic actions reside in the capabilities of firm managers, whereas many external factors, such as access to public infrastructure, did not turn out to have a significant influence. The findings have interesting implications for the management of agribusiness firms in African countries and other developing and emerging economies.
Optimal Tight Frames and Quantum Measurement
Creators: name: Eldar, Y. C.
name: Forney, G. David
Publisher: name: arXiv
Year: 2001
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Tight frames and rank-one quantum measurements are shown to be intimately related. In fact, the family of normalized tight frames for the space in which a quantum mechanical system lies is precisely the family of rank-one generalized quantum measurements (POVMs) on that space. Using this relationship, frame-theoretical analogues of various quantum-mechanical concepts and results are developed. The analogue of a least-squares quantum measurement is a tight frame that is closest in a least-squares sense to a given set of vectors. The least-squares tight frame is found for both the case in which the scaling of the frame is specified (constrained least-squares frame (CLSF)) and the case in which the scaling is free (unconstrained least-squares frame (ULSF)). The well-known canonical frame is shown to be proportional to the ULSF and to coincide with the CLSF with a certain scaling. Finally, the canonical frame vectors corresponding to a geometrically uniform vector set are shown to be geometrically uniform and to have the same symmetries as the original vector set.
description: Submitted to IEEE Transactions on Information Theory. LaTex, 50 pages
Nonlocal Thermoelectricity in a S-TI-S Junction in Contact with a N-Metal Probe: Evidence for Helical Edge States
Creators: name: Blasi, Gianmichele
name: Taddei, Fabio
name: Arrachea, Liliana
name: Carrega, Matteo
name: Braggio, Alessandro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a Josephson junction hosting a Kramers pair of helical edge states of a quantum spin Hall bar in contact with a normal-metal probe. In this hybrid system, the orbital phase induced by a small magnetic field threading the junction known as Doppler shift (DS), combines with the conventional Josephson phase difference and originates an effect akin to a Zeeman field in the spectrum. As a consequence, when a temperature bias is applied to the superconducting terminals, a thermoelectric current is established in the normal probe. We argue that this purely non-local thermoelectric effect is a unique signature of the helical nature of the edge states coupled to superconducting leads and it can constitute a useful tool for probing the helical nature of the edge states in systems where the Hall bar configuration is difficult to achieve. We fully characterize thermoelectric response and performance of this hybrid junction in a wide range of parameters, demonstrating that the external magnetic flux inducing the DS can be used as a knob to control the thermoelectric response and the heat flow in a novel device based on topological junctions.
title: Jacques Leibowitch, "La position éthique du médecin et le "dépistage""
Creators: name: Leibowitch, Jacques
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Source: http://www.calames.abes.fr/pub/ms/Calames-20193111031798128
description: created: start=1975;end=2018
A case study about the mass exclusion limits for the BSM vector resonances with the direct couplings to the third quark generation
Creators: name: Gintner, Mikuláš
name: Juráň, Josef
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The upper bounds that the LHC measurements searching for heavy resonances beyond the Standard model set on the resonance production cross sections are not universal. They depend on various characteristics of the resonance under consideration, like its mass, spin, and its interaction pattern. Their validity are also limited by the assumptions and approximations applied to their calculations. The bounds are typically used to derive the mass exclusion limits for the new resonances. In our work, we address some of the issues that emerge when deriving the mass exclusion limits for the strongly coupled composite $SU(2)_{L+R}$ vector resonance triplet which would interact directly to the third quark generation only. We investigate the restrictions on the applicability of the generally used limit-obtaining procedure to this particular type of vector resonances. We demonstrate that, in this case, it is necessary to consider the bottom quark partonic contents of the proton. Eventually, we find the mass exclusion limits for this resonance triplet for some representative subsets of the parameter space.
description: 22 pages, 14 figures, 8 tables
Tryphosella Bonnier 1893
Creators: name: Lowry, J. K.
name: Stoddart, H. E.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Tryphosidae
Tryphosella

description: Tryphosella Bonnier, 1893
 Remarks. There is considerable variation within the genus Tryphosella as defined by Lowry & Stoddart (1995). One of the main defining characters of Tryphosella is the morphology of gnathopod 1 in which the coxa is reduced (slightly shorter than coxa 2) and tapering and the ischium is short, as evidenced in the type species T. sarsi Bonnier, 1893. Within the genus, especially in Australasian species, there is a tendency towards shortening the coxa to a point where it becomes about as long as broad and the ischium becomes at least twice as long as broad, as evidenced in the new species T. seasana. Given the two extremes there appears to be a case for establishing a second genus, but both characters are gradational so that in the case of T. flynnana and T. seasana, which are very similar, T. flynnana would remain in Tryphosella and T. seasana would move to a new genus.
 Another set of defining characters is the prominent ridge on the coxae of pereopods 4 and 5 and an apparent ‘photophore’ on the basis of pereopod 5. Several species (T. charlotteae sp. nov., T. miersi (Stebbing, 1888), T. mucronata (Pirlot, 1936)) known from Australia and New Guinea share these apomorphic characters. In other respects they cannot be separated from the genus Tryphosella and appear to form a species complex within it. At this stage we prefer to maintain all species in Tryphosella.
description: Published as part of Lowry, J. K. & Stoddart, H. E., 2009, Lysianassidae *, pp. 561-597 in Zootaxa 2260 (1) on page 581, DOI: 10.11646/zootaxa.2260.1.31, http://zenodo.org/record/5308147
Employment and Efficiency of Farms in Transition: an Empirical Analysis for Brandenburg
Creators: name: Balmann, Alfons
name: Czasch, Britta
name: Odening, Martin
name: Balmann, Alfons
name: Czasch, Britta
name: Odening, Martin
Publisher: name: Unknown
Year: 1997
Subjects: Farm Management
Labor and Human Capital

description: Changes in the political, economic and legal framework after reunification led to major structural changes in East German agriculture. Altered factor and product price relations, abolition of traditional channels of distribution and problems with liquidity forced existing farms to adjust their organization and factor input, to increase productivity and to seek technical progress. Although the number of agricultural enterprises has grown continually as a result of the appearance of new and re-established farms, the number of people engaged in agriculture has fallen dramatically. In Brandenburg - the federal state surrounding Berlin - 31 per cent of those employed in agriculture in 1990 were forced into early retirement, and another 20 per cent took part in further education, retraining or employment creation schemes (MELF, 1997). Many of those workers who had been engaged in employment creation schemes became unemployed after completion. Even from 1992 to 1997, the· workforce in agriculture decreased from 39 055 to 25 991 working units (WU). The paper attempts to study the factors that have determined the employment decisions of farm operators and how they adjusted employment over time with particular regard to legal forms and production structures. This is achieved by applying a data envelopment analysis to a sample of 89 farms, existing over the period 1992/93 to 1995/96. The article is structured as follows. After presenting the theoretical background of labour deployment in enterprises undergoing transition, some hypotheses are developed as a guideline for the empirical investigation. The next section describes the method and the data which are utilized and that is followed by presentation and discussion of the empirical results.
Standard Cosmology in the DGP Brane Model
Creators: name: Dick, Rainer
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Large extra dimensions provide interesting extensions of our parameter space for gravitational theories. There exist now brane models which can perfectly reproduce standard four-dimensional Friedmann cosmology. These models are not motivated by observations, but they can be helpful in developing new approaches to the dimensionality problem in string theory. I describe the embedding of standard Friedmann cosmology in the DGP model, and in particular the realization of our current (dust+Lambda)-dominated universe in this model.
description: 15 pages, 1 figure, 1 reference added
Dynamics of a period-three pattern loaded Bose-Einstein condensate in an optical lattice
Creators: name: Rey, Ana M.
name: Blakie, P. B.
name: Clark, Charles W.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We discuss the dynamics of a Bose-Einstein condensate initially loaded into every third site of an optical lattice using a description based upon the discrete nonlinear Schrodinger equation. An analytic solution is developed for the case of a periodic initial condition and is compared with numerical simulations for more general initial configurations. We show that mean field effects in this system can cause macroscopic quantum self-trapping, a phenomenon already predicted for double well systems. In the presence of a uniform external potential, the atoms exhibit generalized Bloch oscillations which can be interpreted in terms of the interference of three different Bloch states. We also discuss how the momentum distribution of the system can be used as experimental signature of the macroscopic self trapping effect.
description: 10 pages, 11 figures
Physical Sources of Scatter in the Tully-Fisher Relation
Creators: name: Kannappan, Sheila J.
name: Fabricant, Daniel G.
name: Franx, Marijn
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze residuals from the Tully-Fisher relation for the emission-line galaxies in the Nearby Field Galaxy Survey, a broadly representative survey designed to fairly sample the variety of galaxy morphologies and environments in the local universe. For spirals brighter than M_R^i=-18, we find strong correlations between Tully-Fisher residuals and both B-R color and EW(Halpha). The extremes of the correlations are populated by Sa galaxies, which show consistently red colors, and spirals with morphological peculiarities, which are often blue. If we apply an EW(Halpha)-dependent or B-R color-dependent correction term to the Tully-Fisher relation, the scatter in the relation no longer increases from R to B to U but instead drops to a nearly constant level close to the scatter we expect from measurement errors. We argue that these results probably reflect correlated offsets in luminosity and color as a function of star formation history. Broadening the sample in morphology and luminosity, we find that most non-spirals brighter than M_R^i=-18 follow the same correlations as do spirals, albeit with greater scatter. However, the color and EW(Halpha) correlations do not apply to galaxies fainter than M_R^i=-18 or to emission-line S0 galaxies with anomalous gas kinematics. For the dwarf galaxy population, the parameters controlling Tully-Fisher residuals are instead related to the degree of recent disturbance: overluminous dwarfs have higher rotation curve asymmetries, brighter U-band effective surface brightnesses, and shorter gas consumption timescales than their underluminous counterparts. As a result, sample selection strongly affects the measured faint-end slope of the Tully-Fisher relation. Passively evolving, rotationally supported galaxies display a break toward steeper slope at low luminosities.
description: 58 pages including 21 figures, AJ, accepted
Phonon-mediated anisotropic superconductivity in the Y and Lu nickel borocarbides
Creators: name: Martinez-Samper, P.
name: Suderow, H.
name: Vieira, S.
name: Brison, J. P.
name: Luchier, N.
name: Lejay, P.
name: Canfield, P. C.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present scanning tunneling spectroscopy and microscopy measurements at low temperatures in the borocarbide materials RNi2B2C (R=Y, Lu). The characteristic strong coupling structure due to the pairing interaction is unambiguously resolved in the superconducting density of states. It is located at the superconducting gap plus the energy corresponding to a phonon mode identified in previous neutron scattering experiments. These measurements also show that this mode is coupled to the electrons through a highly anisotropic electron-phonon interaction originated by a nesting feature of the Fermi surface. Our experiments, from which we can extract a large electron-phonon coupling parameter lambda (between 0.5 and 0.8), demonstrate that this anisotropic electron-phonon coupling has an essential contribution to the pairing interaction. The tunneling spectra show an anisotropic s-wave superconducting gap function.
description: 5 pages, 3 figures
Generalized Spin Fluctuation Feedback In Correlated Fermion Superconductors
Creators: name: Amin, Adil
name: Agterberg, D. F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Experiments reveal that the superconductors $\text{UPt}_3$, $\text{U}_{1-x}\text{Th}_x\text{Be}_{13}$ and $\text{PrOs}_4\text{Sb}_{12}$ undergo two superconducting transitions in the absence of an applied magnetic field. The prevalence of these multiple transitions suggests a common underlying mechanism. A natural candidate theory which accounts for these two transitions is the existence of a small symmetry breaking field, however such a field has not been observed in $\text{PrOs}_4\text{Sb}_{12}$ or $\text{U}_{1-x}\text{Th}_x\text{Be}_{13}$ and has been called into question for $\text{UPt}_3$. Motivated by arguments originally developed for superfluid $^3\text{He}$ we propose that a generalized spin fluctuation feedback effect is responsible for these two transitions. We first develop a phenomenological theory for $^3\text{He}$ that couples spin fluctuations to superfluidity, which correctly predicts that a high temperature broken time-reversal superfluid $^3\text{He}$ phase can emerge as a consequence. The transition at lower temperatures into a time-reversal invariant superfluid phase must then be first order by symmetry arguments. We then apply this phenomenological approach to the three superconductors $\text{UPt}_3$, $\text{U}_{1-x}\text{Th}_x\text{Be}_{13}$ and $\text{PrOs}_4\text{Sb}_{12}$ revealing that this naturally leads to a high-temperature time-reversal invariant nematic superconducting phase, which can be followed by a second order phase transition into a broken time-reversal symmetry phase, as observed.
Comparative phylogenetic exploration of the human mitochondrial proteome: Insights into disease and metabolism
Creators: name: Smith, Cassandra Lauren
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: Mitochondria
Phylogenetic profiling
Mitochondrial disease
Mitochondrial carriers
Non-enzymatic acetylation
Mammalian ageing

description: Mitochondria are a key organelle within human cells, with functions ranging from ATP synthesis to apoptosis. Changes in mitochondrial function are associated with many diseases, as well as ‘natural’ processes like ageing. Mitochondria have a unique evolutionary origin, as the result of an endosymbiotic relationship between a bacterium and an archaeal cell. Therefore, the phylogenetic history of the mitochondrial proteome is also unique within the total human proteome. A new description of the genes encoding the human mitochondrial proteome – IMPI (Integrated Mitochondrial Protein Index) 2017 – provided an opportunity for exploration of mitochondrial proteome history and the application of this knowledge to the understanding of gene function, disease and ageing. To facilitate the exploration of the mitochondrial proteome, I created a manually curated dataset of 190,097 predicted orthologues of the 1,550 IMPI 2017 human genes across 359 species, using reciprocal best hit analysis as the basis for orthologue prediction. I used this to explore gene history and the potential for phylogenetic profiling to predict the function of uncharacterised genes. This inspired the use of phylogenetic profiling within two phyla of animals, to link presence and absence of metabolic genes to the function of mitochondrial transporters. Potential transport substrates were predicted for two groups of uncharacterised mitochondrial carriers. I also used the dataset to identify features of genes associated with monogenetic disease, as well as differences between recessive and dominant disease genes. A similar orthologue identification method was used to explore the total sequenced viral proteome for potential orthologues of mitochondrial proteins. This showed that a range of mitochondrial proteins are shared with viruses, potentially facilitating the co-opting of mitochondrial function during viral infection of eukaryotic cells. I then used orthology to explore the conservation of residues linked to protein acetylation and identify a link with lifespan in warm-blooded vertebrates. In conclusion, I have used orthology to further the understanding of human mitochondrial proteome history and developed applications of this information. For example, phylogenetic features of disease genes are being used as part of a wider pipeline to predict mitochondrial disease genes. Furthermore, predicted substrates of the SLC25A14/30 mitochondrial carriers are being tested. My dataset provides further opportunities to explore the evolution and function of the mitochondrion.
description: Funded by the Medical Research Council
ENTREPRENEURSHIP AND DEVELOPMENT OF RURAL AREAS IN UKRAINE
Creators: name: Kolomiets T.V.
name: Tomashuk, I.V.
Publisher: name: Colloquium-journal
Year: 2021
Subjects: entrepreneurship
rural areas
regional development
economic growth
agriculture
diversification.

description: The article considers the evolution of entrepreneurship, which contributes to the creation of the necessary conditions for the integrated development of rural areas, solving social problems of the village, ensuring food security of the country. It is stated that entrepreneurship as a type of economic activity is an independent, proactive activity carried out by business entities (entrepreneurs) in order to achieve economic and social results and make a profit. It is emphasized that the indisputable fact is that entrepreneurship acts not only as a way of life, but also as an incentive for self-improvement and self-development. It is determined that the desire of people to ensure economic independence and professional self-realization leads to starting their own business, mastering a new profession, which will allow them to use their creative potential, show the best business qualities and entrepreneurship. It is indicated that personal realization takes place through the accumulation of intellectual experience and the formation of professional skills and competence. It is proved that the growth of entrepreneurial initiative in rural areas in a competitive environment forces participants in economic relations to show innovation, originality, creativity, ingenuity to give their product new properties, distinguish it from the goods and services of competitors and win the consumer. It is concluded that a significant source of income for the rural population today is non-agricultural employment, which is justified by the rapid pace of agricultural mechanization and seasonality of agricultural production. It was found that one of the most effective ways to solve the problems of rural development in Ukraine is the development and implementation of a state strategy for balanced rural development, which must meet the norms and requirements already established in the European Union and other developed countries. It is generalized that a promising and objectively possible direction of agricultural development as a basis for rural development is the spread of environmentally friendly organic production of agricultural products, which will create new jobs in rural areas, as organic farming requires more manual labor than traditional chemical.
Grover Algorithm with zero theoretical failure rate
Creators: name: Long, G. L.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In standard Grover's algorithm for quantum searching, the probability of finding the marked item is not exactly 1. In this Letter we present a modified version of Grover's algorithm that searches a marked state with full successful rate. The modification is done by replacing the phase inversion by two phase rotation through angle $ϕ$. The rotation angle is given analytically to be $ϕ=2 \arcsin(\sin{π\over (4J+6)}\over \sinβ)$, where $\sinβ={1\over \sqrt{N}}$, $N$ the number of items in the database, and $J$ an integer equal to or greater than the integer part of $({π\over 2}-β)/(2β)$. Upon measurement at $(J+1)$-th iteration, the marked state is obtained with certainty.
description: 5 pages. Accepted for publication in Physical Review A
title: The Fragility of Meta-Regression Models in Observational Research
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Bruns, Stefan B.
Publisher: name: Philipps-Universität Marburg
Year: 2016
Subjects: p-hacking
meta-analysis
publication bias
Monte Carlo simulation
Meta-regression
omitted-variable bias, sampling variability
sampling error
Economics
Wirtschaft

description: Many meta-regression analyses that synthesize estimates from primary studies have now been published in economics. Meta-regression models attempt to infer the presence of genuine empirical effects even if the authors of primary studies select statistically significant and theory-confirming estimates for publication. Meta-regression models were originally developed for the synthesis of experimental research where randomization ensures unbiased and consistent estimation of the effect of interest. Most economics research is, however, observational and authors of primary studies can search across different regression specifications for statistically significant and theory-confirming estimates. Each regression specification may possibly suffer from biases such as omitted-variable biases that result in biased and inconsistent estimation of the effect of interest. We show that if the authors of primary studies search for statistically significant and theory-confirming estimates, meta-regression models tend to systematically make false-positive findings of genuine empirical effects. The ubiquity of such search processes for specific results may limit the applicability of meta-regression models in identifying genuine empirical effects in economics.
EVALUATION OF THE DISTANCE LEARNING RESULTS FOR THE DISCIPLINE "CHILDREN'S INFECTIOUS DISEASES" BY THE 6TH YEAR STUDENTS OF THE BUKOVINIAN STATE MEDICAL UNIVERSITY DURING THE COVID-19 PANDEMIC
Creators: name: Ivanova L.A.
name: Horbatiuk I. B.
name: Horbatiuk Ir.B.
Publisher: name: Colloquium-journal
Year: 2021
Subjects: distance learning
students .

description: The research was conducted with using the author's questionnaire "Student Survey on Online Learning", developed on the basis of the Google form and aimed at improving the educational process. This form of education was accompanied with an ambiguous attitude of all participants in the learning process, as it depended on the conditions and features of learning.
Explorable Super Resolution
Creators: name: Bahat, Yuval
name: Michaeli, Tomer
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Single image super resolution (SR) has seen major performance leaps in recent years. However, existing methods do not allow exploring the infinitely many plausible reconstructions that might have given rise to the observed low-resolution (LR) image. These different explanations to the LR image may dramatically vary in their textures and fine details, and may often encode completely different semantic information. In this paper, we introduce the task of explorable super resolution. We propose a framework comprising a graphical user interface with a neural network backend, allowing editing the SR output so as to explore the abundance of plausible HR explanations to the LR input. At the heart of our method is a novel module that can wrap any existing SR network, analytically guaranteeing that its SR outputs would precisely match the LR input, when downsampled. Besides its importance in our setting, this module is guaranteed to decrease the reconstruction error of any SR network it wraps, and can be used to cope with blur kernels that are different from the one the network was trained for. We illustrate our approach in a variety of use cases, ranging from medical imaging and forensics, to graphics.
title: Examination Rules and Student Effort
title: MAGKS - Joint Discussion Paper Series in Economics
Creators: name: Michaelis, Jochen
name: Schwanebeck, Benjamin
Publisher: name: Philipps-Universität Marburg
Year: 2016
Subjects: examination rules
resits
student performance
Economics
Wirtschaft
standard setting; higher education

description: This paper contributes to the economics of examination rules. We show how
rational students reallocate their learning e¤ort as a response to a charge for the second exam attempt, a cap on the maximum resit mark, an adjustment of the passing standard, a variation of the time span between two attempts, a minimum requirement to qualify for the second attempt, and a malus points account. The effort maximizing rule is the malus account, a charge for the second attempt delivers the highest overall passing probability.
MORPHOFUNCTIONAL FEATURES OF CHANGES IN THE PANCREAS IN WET AND DRY FORMS OF FELINE INFECTIOUS PERITONITIS
Creators: name: Kotsyumbas G. I.
name: Khalaniia M. R.
name: Zolototska, O.B.
Publisher: name: Colloquium-journal
Year: 2021
Subjects: cats
infectious peritonitis
FIP
pathomorphology
pancreas
exocrinocytes
vascular stromal dystrophies
pancreatosis
pancreatitis.

description: The article presents the results of macroscopic, histological and histochemical studies of the pancreas of cats in wet and mixed forms of FIP. A pathological examination of 18 carcasses of cats aged from 3 months to 5.5 years, in which lifelong feline infectious peritonitis was diagnosed (based on history, clinical signs, morphological and biochemical analysis of blood, ultrasound, Rivalt test and rapid test). Samples of the pancreas were taken, which were fixed in 10% aqueous solution of neutral formalin, solutions of Carnois, Buena and 96 ° ethyl alcohol. Histoxylin and eosin-stained histoscripts were prepared according to McManus, Brachet, Van Gieson and examined under a microscope. It was found that the most severe structural and functional changes in the pancreas of dead cats were developed in the stroma of the organ, in the arterio-venular system, receptors, excretory ducts, both in wet and dry forms of FIP. The development of pancreatosis in the pancreas of cats in the wet form found, which was characterized by disorganization of connective tissue, the development of fibrinoid necrosis of the walls of arterioles, disseminated venous thrombosis, stasis in the capillaries, obstruction and obstruction of the excretory ducts. The detected morphological changes indicate the development of irreversible vascular-stromal dystrophies in the pancreas. Productive pancreatitis has developed in the pancreas of cats in dry form, which in cats at a shorter course of the disease was characterized by round-cell infiltration of the stroma, dystrophicnecrobiotic processes of parenchymal cells, obstruction of the interparticle ducts. Fibrosis progressed over a longer course in cats, which was expressed in the growth of interstitial connective tissue fibers, atrophy of the parenchymal lobes, productive necrotic vasculitis, and occlusion of the interparticle excretory ducts.
Radial equation for an accretion flow driven by Poynting flux
Creators: name: Lee, Hyun Kyu
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using a toy model of a two dimensional accretion disk, we discuss further the radial equation of the accretion flow dominated by the Poynting flux. Assuming the force-free condition is valid around the accretion disk, the relation between the fluid angular velocity of the disk, $Ω_D$, and the angular velocity of the magnetic field lines, $Ω_F$, is also discussed.
description: 11 pages, typos corrected