cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Topographically Controlled Flow on the West Spitsbergen Shelf
Creators: name: Nilsen, Frank
name: Lunde, Juni Vaardal
name: Skogseth, Ragnheid
Publisher: name: ASC 2012 - Theme session D
Year: 2024
Subjects: Arctic Ocean (ICES Ecoregion)
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.A one layer numerical model is developed that demonstrates how the Atlantic Water (AW) from the West Spitsbergen Current (WSC) is topographically steered onto the West Spitsbergen Shelf (WSS) with a special emphasize on the Isfjorden Trough. Model results show that the WSC connects easier to the Isfjorden Trough than anywhere else on the shelf, letting the trough being exposed to warm and saline AW. The simple one layer barotropic model gives a good approximation of the dynamical processes on the WSS, which plays a significant role in the cooling process of the AW in the WSC on its way towards the Arctic Ocean. The intrusion of AW on Arctic shelves and into fjord systems also represents a transition from Arctic-type water masses to Atlantic-type water masses, and a complete change in the biomass and species composition. Estimates of oceanic heat transport on the WSS and towards the fjord system is presented. This heat has the potential to increase the melt rate of glaciers and has been identified as a likely mechanism leading to the acceleration, thinning and retreat of glaciers along the west coast of Spitsbergen.
Chiral d+is superconducting state in the two dimensional t-t' Hubbard model
Creators: name: Mraz, J.
name: Hlubina, R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Applying the recently developed variational approach to Kohn-Luttinger superconductivity to the t-t' Hubbard model in two dimensions, we have found, for sizeable next-nearest neighbor hopping, an electron density controlled quantum phase transition between a d-wave superconducting state close to half filling and an s-wave superconductor at lower electron density. The transition occurs via an intermediate time reversal breaking d+is superconducting phase, which is characterized by nonvanishing chirality and density-current correlation. Our results suggest the possibility of a bulk time reversal symmetry breaking state in overdoped cuprates.
Caste, Technology and Social Network
Creators: name: Gipta, Ishika
name: Veettil, Chellattan
name: Speelman, Stijn
name: Gipta, Ishika
name: Veettil, Chellattan
name: Speelman, Stijn
Publisher: name: Unknown
Year: 2017
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Technology adoption
subject: Varietal diffusion
subject: Social Network
subject: Caste

description: This paper analyzes the role of informal social networks in the technology diffusion in a caste based society where social hierarchical structure is prevalent. Often information and technology diffusion get constrained within the social and economic boundaries. In a complex and hierarchical social system where caste plays a very decisive role in everyday life as well as the political and policy fabric of the regional, state and national system; proper targeting and dissemination of technology to the marginalized sections of the society is very important for their development. Taking diffusion of improved rice varieties as an example, we analyse whether technology diffusion is confined within caste based social network or technology can break the caste boundaries and spreads across the social network.
title: Seasonal and Interannual Variability of the Slope Current and its Possibe impact on the Barents Sea Opening
Creators: name: Chafik, Léon
name: Skagseth, Øystein
name: Nilsson, Johan
Publisher: name: ASC 2012 - Theme session D
Year: 2024
Subjects: Arctic Ocean (ICES Ecoregion)
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.The Norwegian Atlantic Slope Current (NwASC) provides the most direct link connecting the North Atlantic to the Arctic. The focus of this study is on the large-scale variability of the slope current and its forcing mechanisms. We utilize satellite altimeter data from 1992-2011 on weekly basis to estimate the local sea level gradient from about 55to 80N in order to resolve the spatio-temporal variability along a constant f/H contour in the main core of the slope current. One principal question we will attempt to enlighten is how the mean seasonal cycle changes along-stream of the slope current. An analysis is developed that helps diagnosing where the NwASC loses/gains mass. Additionally, a particular emphasis will be on the splitting of the slope current into the Barents Sea and the Fram Strait branches. This will be related to the atmospheric forcing controlling the slope current variability using a topographic Sverdrup relation. The study also investigate how the wind forcing has changed over inter-annual and longer times scales, and further relate this to observed hydrographic variability. Finally, in relation to climate change we briefly discuss the sensitivity of these results to possible future changes in the forcing.
Land Consolidation as Technical Change: Effects on Off-farm Labour Supply in Vietnam
Creators: name: Mguyen, Huy Quynh
name: Warr, Peter
name: Mguyen, Huy Quynh
name: Warr, Peter
Publisher: name: Unknown
Year: 2017
Subjects: subject: Land Economics/Use
subject: Land consolidation
subject: factor-biased technical change
subject: rural diversification
subject: Vietnam

description: This paper studies land reform through the reduction of land fragmentation in rice production and views it as a form of technical change. The analysis hypothesizes that the impacts of land consolidation depend on the factor bias of this technical change. At a theoretical level, if the technical change is factor neutral, it will reduce off-farm labor supply and slow rural structural transformation away from rice production. Conversely, if the technical change is factor-biased and the elasticity of substitution between factors is low enough, the opposite conclusions are possible. The paper studies the implications of these propositions for Vietnam by developing an empirical analysis of the impact of rice land consolidation on farm and nonfarm outcomes. The findings indicate that the reduction of land fragmentation – land consolidation – decreases farm labor supply, reduces labor intensity in agriculture and raises farm profits and productivity. In quantitative terms, if land fragmentation declines by 1 per cent, farm labor supply decreases by 0.36 per cent. Farm profits and productivity per hectare increase by 0.12 per cent and 0.055 per cent, respectively. Similarly, land consolidation releases more farm labor to nonfarm sectors, and increases nonfarm profits. Based on these findings, the paper argues that land consolidation should be encouraged through development of institutions related to land markets, such as land ownership rights and the promotion of land rental markets.
Methods for 3-D vector microcavity problems involving a planar dielectric mirror
Creators: name: Foster, David H.
name: Nockel, Jens U.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We develop and demonstrate two numerical methods for solving the class of open cavity problems which involve a curved, cylindrically symmetric conducting mirror facing a planar dielectric stack. Such dome-shaped cavities are useful due to their tight focusing of light onto the flat surface. The first method uses the Bessel wave basis. From this method evolves a two-basis method, which ultimately uses a multipole basis. Each method is developed for both the scalar field and the electromagnetic vector field and explicit ``end user'' formulas are given. All of these methods characterize the arbitrary dielectric stack mirror entirely by its 2\times2 transfer matrices for s- and p-polarization. We explain both theoretical and practical limitations to our method. Non-trivial demonstrations are given, including one of a stack-induced effect (the mixing of near-degenerate Laguerre-Gaussian modes) that may persist arbitrarily far into the paraxial limit. Cavities as large as 50 λare treated, far exceeding any vectorial solutions previously reported.
description: For high-quality figures, visit http://darkwing.uoregon.edu/~noeckel/papers.php
Complete integrability and equilibrium thermodynamics of biaxial nematic systems with discrete orientational degrees of freedom
Creators: name: De Matteis, Giovanni
name: Giglio, Francesco
name: Moro, Antonio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study a discrete version of a biaxial nematic liquid crystal model with external fields via an approach based on the solution of differential identities for the partition function. In the thermodynamic limit, we derive the free energy of the model and the associated closed set of equations of state involving four order parameters, proving the integrability and exact solvability of the model. The equations of state are specified via a suitable representation of the orientational order parameters, which imply two-order parameter reductions in the absence of external fields. A detailed exact analysis of the equations of state reveal a rich phase diagram where isotropic versus uniaxial versus biaxial phase transitions are explicitly described, including the existence of triple and tricritical points. Results on the discrete models are qualitatively consistent with their continuum analog. This observation suggests that, in more general settings, discrete models may be used to capture and describe phenomena that also occur in the continuum for which exact equations of state in closed form are not available.
description: 28 pages, 5 figures
Demographic Transformation and Its Implications on Rice Value Chain in Asia
Creators: name: Bhandari, Hummnath
name: Mishra, Ashok
name: Mohanty, Samarendu
name: Bhandari, Hummnath
name: Mishra, Ashok
name: Mohanty, Samarendu
Publisher: name: Unknown
Year: 2017
Subjects: subject: Crop Production/Industries
subject: demography
subject: transformation
subject: rice production
subject: rice consumption
subject: Asia

description: The demographic structure of Asian countries is rapidly transforming with large implications on future rice production and consumption in the region. Literature on the impact of demographic transformation and human capital development on the nature and organization of rice value chain are scanty. This paper examines the depth and breadth of ongoing demographic transformation and draws ramifications on rice value chain in Asia. We use 27 years long primary panel household data of Bangladesh and long-run time-series secondary data from 17 major rice-growing countries in East, Southeast, and South Asia. The data were analyzed using simple descriptive statistics and derived implications for future. The results show that Asia is observing declining trends in women fertility rate, child mortality rate, family size, population growth rate, share of rural and agricultural population, farm labor population, and involvement of youth in farming. On the other hand, rural outmigration, ageing of agricultural population, and urbanization show increasing trends. These emerging trends are likely to be more rapid in coming decades, with far-reaching impacts on future rice value chain mediated through labor market, rice market, and rice demand and supply. Declining and ageing agricultural population will lead to both quantity and quality of labor scarcity, abandoning of farming land, low rate of adoption of improved technologies, higher production cost, and slow growth of rice production. When rice supply growth trail behind the rice demand growth, it will push rice prices up and will hurt the poor disproportionately more. Policymakers and scientists must anticipate more rapid demographic transformation in the future and implement necessary technological, institutional, policy, and strategic solutions to manage or cope with future demographic transformations. This warrants agricultural policies and programs focusing on farm mechanization, introducing innovative technologies, using information and communication technologies, training youths on improved farming practices, providing financial and other support services to young farmers, and developing efficient rural-urban marketing systems. Finally, investments are also needed to develop and disseminate rice varieties with desired attributes that consumers demand.
Estimation of the topside ionosphere and plasmasphere by an Ensemble Kalman Filter and the simultaneous multiplicative column-normalized method SMART+
Creators: name: Tatjana Gerzen
name: Michael Schmidt
name: David Minkwitz
Publisher: name: Zenodo
Year: 2024
Subjects: Ionosphere
Plasmasphere
Reconstruction
Kalman Filter
SMART+
NeQuick
Tomography

description: Trans-ionospheric radio signals, transmitted from satellites used in telecommunication, navigation or remote sensing, are affected by the electron density along their ray path through the plasmasphere and ionosphere. Especially in the nighttime, up to 50% of the signal delays of L-band signals used in the Global Navigation Satellite System may originate from altitudes above ionospheric F2 layer, which consists of the topside ionosphere going over into the plasmasphere. In general, the majority of data, available for the reconstruction of the ionosphere and plasmasphere, are Slant Total Electron Content (STEC) measurements, i.e. the integral of the electron density along the ray path between the transmitting satellite and the receiver. However, the ground based STEC values are usually dominated by the high electron density values within and below the F2 layer peak, and thus the exact information about the topside ionosphere and especially the plasmasphere is almost impossible to extract.

Thus, in the presented work we concentrate on the estimation of the topside part of the ionosphere and the plasmasphere by means of space based STEC measurements only. The STEC measurements of eleven Low Earth Orbit (LEO) satellites are used for the reconstructions by an Ensemble Kalman Filter (EnKF) and the Simultaneous Multiplicative Column-Normalized Method (SMART+), where the NeQuick model serves as background.

We investigate the capability of the estimations to reconstruct the assimilated STEC, independent STEC measurements, Swarm Langmuir Probes (LP) electron density measurements and COSMIC Ionospheric Radio Occultation (IRO) profiles for two periods of the year 2015 covering moderate to perturbed ionospheric conditions. We observe that in median the NeQuick model underestimates the IRO electron densities in the moderate period and for high latitudes in the perturbed period as well as the STEC measurements for the three reference LEO satellites, GRACE and Swarm A, during both periods.

The comparison with the assimilated STEC shows that during both periods both methods reduce the STEC residuals by up to 86% compared to the background model NeQuick. The residuals of the independent STEC of the two methods are up to 64% smaller compared to the NeQuick model residuals. For the NeQuick model the median of the absolute relative IRO residuals is about 33% in the quiet period and about 25% in the perturbed period. SMART+ reduces these residuals whereas EnKF does not provide an improvement.
Spin-photon interaction in a nanowire quantum dot with asymmetrical confining potential
Creators: name: Li, Rui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electron (hole) spin-photon interaction is studied in an asymmetrical InSb (Ge) nanowire quantum dot. The spin-orbit coupling in the quantum dot mediates not only a transverse spin-photon interaction, but also a longitudinal spin-photon interaction due to the asymmetry of the confining potential. Both the transverse and the longitudinal spin-photon interactions have non-monotonic dependence on the spin-orbit coupling. For realistic spin-orbit coupling in the quantum dot, the longitudinal spin-photon interaction is much (at least one order) smaller than the transverse spin-photon interaction. The order of the transverse spin-photon interaction is about 1 nm in terms of length $|z_{eg}|$, or 0.1 MHz in terms of frequency $eE_{0}|z_{eg}|/h$ for a moderate cavity electric field strength $E_{0}=0.4$ V/m.
description: 8 pages, 6 figures
Doping dependence of the gap anisotropy in LCCO studied by millimeter-wave spectroscopy
Creators: name: Pronin, A. V.
name: Pimenov, A.
name: Loidl, A.
name: Tsukada, A.
name: Naito, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We measure the penetration depth of optimally doped and underdoped La2-xCexCuO4 in the millimeter frequency domain (4 - 7 cm-1) and for temperatures 2 K < T < 300 K. The penetration depth as function of temperature reveals significant changes on electron doping. It shows quadratic temperature dependence in underdoped samples, but increases almost exponentially at optimal doping. Significant changes in the gap anisotropy (or even in the gap symmetry) may account for this transition.
description: 4 pages, 4 figures
title: Imprint of the North Atlantic climate on the long term hydroclimate changes in the Gulf of Mexico
Creators: name: Roldán-Heredia, A.
name: Molinero, J.C.
name: Marín-Hernández, M.
name: Meiners, C.
Publisher: name: ASC 2012 - Theme session D
Year: 2024
Subjects: Arctic Ocean (ICES Ecoregion)
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.Climate teleconnections link large scale regions through the transient behavior of atmospheric waves. In the Atlantic Ocean, one of the most prominent teleconnections is the North Atlantic Oscillation (NAO), which together with the Arctic Oscillation (AO) constitutes regional manifestations of the Northern Annular Mode (NAM), closely linked to the leading pattern of sea surface temperature (SST). Here we have examined the potential influence such meteorological phenomenon has on patterns of low frequency variability of hydroclimate conditions fisheries in the Gulf of Mexico (GoM). Statistical analyses were performed using large- (NAO/AO) and regional scale (GoM climate) data and time series of GoM fish captures over the period 1980-2010. Results show significant correlative associations between the GoM hydroclimate variability and the North Atlantic climate over the period 1950-2010. The oscillation frequency of some hydroclimatic variables, the NAO/AO and some catch time series showed common peaks. The relationship, however, shows a transient behavior leaded by the varying dominant period of the climatic teleconnection. The close link between large-scale atmospheric forcing and regional environmental conditions suggest cascade down effects on plankton communities and/or changes in reproductive habitat for fish. The long periods of alternated low and high SST, likely coupled to the Atlantic Multidecadal Oscillation, can alter both food sources for fish larvae (i.e. changes in zooplankton structure) and the thermal window for mass reproduction of fish.
title: Changes in temperature and salinity in the eastern Eurasian Basin and its implication for the Arctic Ocean heat and freshwater balance
Creators: name: Rudels, Bert
name: Korhonen, Meri
name: Schauer, Ursula
name: Pisarev, Sergey
name: Rabe, Benjamin
name: Wisotzki, Andreas
Publisher: name: ASC 2012 - Theme session D
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The Arctic Ocean is the northernmost part of the North Atlantic. It is an almost enclosed bay dominated by Atlantic water masses. Only the narrow and shallow Bering Strait allows the less saline water of the North Pacific to enter the Arctic Ocean. The Pacific water together with runoff and net precipitation comprises a large part of the low salinity upper layer of the Arctic Ocean. The Atlantic water enters through Fram Strait and over the Barents Sea. The deep (>2500m) Fram Strait allows for a two-way flow and it is the only passage, where intermediate and deep waters can be exchanged between the Arctic Ocean and the Nordic Seas, while the shallow Barents Sea essentially only permits inflows to the Arctic Ocean.
Global Analysis of a Supersymmetric Pati-Salam Model
Creators: name: Blazek, T.
name: King, S. F.
name: Parry, J. K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform a complete global phenomenological analysis of a realistic string-inspired model based on the supersymmetric Pati-Salam $SU(4)\times SU(2)_L \times SU(2)_R$ gauge group supplemented by a U(1) family symmetry, and present predictions for all observables including muon $g-2$, $τ\to μγ$, and the CHOOZ angle. Our analysis demonstrates the compatibility of such a model with all laboratory data including charged fermion masses and mixing angles, LMA MSW and atmospheric neutrino masses and mixing angles, and $b \to s γ$, allowing for small deviations from third family Yukawa unification. We show that in such models the squark and slepton masses may be rather light compared to similar models with exact Yukawa unification.
description: Additional discussion of Higgs couplings. 40 pages
Predicting Users’ Engagement during Interviews with Biofeedback and Supervised Learning: Replication Package
Creators: name: Girardi, Daniela
Publisher: name: figshare
Year: 2020
Subjects: subject: 80309 Software Engineering
subject: FOS: Computer and information sciences

description: This package contains all the material used for the analysis presented in the paper "The Way it Makes you Feel. Predicting Users’ Engagement during Interviews with Biofeedback and Supervised Learning". The README.md file contains all the instructions to replicate the analysis reported in the paper
The Economic and Environmental Impacts of a Free Trade Area of the Asia-Pacific
Creators: name: Akahori, Hirokazu
name: Sawauchi, Daisuke
name: Yamamoto, Yasutaka
name: Akahori, Hirokazu
name: Sawauchi, Daisuke
name: Yamamoto, Yasutaka
Publisher: name: Unknown
Year: 2017
Subjects: subject: Environmental Economics and Policy
subject: FTAAP
subject: Greenhouse gas
subject: Climate change
subject: GTAP

description: The formation of the Free Trade Area of the Asia-Pacific (FTAAP) would not only have a huge economic impact but also a significant environmental impact for Asia-Pacific Economic Cooperation members and the world. Several studies have addressed the economic impact of the FTAAP; however, no studies have examined the impact of the FTAAP on greenhouse gas (GHG) emissions. The purpose of this paper is to answer the following question: Does the FTAAP increase GHG emissions? In answering this question, the potential impact of GHG emissions caused by trade liberalization, assuming the complete removal of all import tariffs among the FTAAP members, was estimated using the Global Trade Analysis Project (GTAP) model, the GTAP CO2 emissions database, and the GTAP non-CO2 emissions database. Under the assumption of the complete removal of all import tariffs among the FTAAP members, our results indicate that the FTAAP is likely to increase the total amount of GHG emissions by the FTAAP members and the world.
Beyond the magnetic field of a finite wire: a teaching approach using the superposition principle
Creators: name: García-Farieta, Jorge Enrique
name: Márquez, Alejandro Hurtado
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: In the introductory courses on electromagnetism, the Biot-Savart law is generally explained by a simple example to find the magnetic field created at any point in space by a small wire element that carries a current. The simplest system studied consists in a straight finite wire, however, to explore the magnetic field in complex geometries is required more imagination to solve the mathematics involved. In this paper, we present a practical methodology to use the superposition principle of magnetic fields by using n-times a finite current-carrying wire to evaluate the magnetic field at any point in space for various geometric configurations. This approach allows students to explore systems with different levels of complexity, combining analytical and computational skills to visualize and analyze the magnetic field.
description: 9 pages, 6 figures. Keywords: Physics Education Research, Teaching, Learning, Electromagnetism. Submitted to The Physics Teacher (TPT) journal
Agent-based Cooperation in Shared Environment
Creators: name: Gaj, Aleksej
name: Karny, Miroslav
Publisher: name: Zenodo
Year: 2024

description: Understanding the cooperation mechanism in biological systems is one of the important aspects of their modelling. Transport processes in biomolecules as well as molecules interactions involve cooperation at the molecular level [1], [2]. For instance modelling protein-protein interactions requires understanding how binding and other factors influence these interactions. So far computational modeling techniques like molecular dynamics simulations, Monte Carlo simulations, or kinetic modeling approaches were used.

The contribution addresses the problem of the implicit cooperation in multi-agent environment formulated and solved as a decision making task. Methodologically agents are modelled as dynamic self-interested independent Bayesian agents that use fully probabilistic design (FPD) [3] to find the optimal DM strategy. The agents cooperate via sharing their DM rules (patterns). The neighbour’s DM rule, gathered by the cooperating agent, is used as an external predictor to enrich the agent’s knowledge about the neighbour. This scenario describes the mechanisms that occur in biological systems. 

 

[1] Stefan MI, Le Novère N (2013) Cooperative Binding. PLOS Computational Biology 9(6)

[2] Zhou, R., & Berne, B. J. (2002). What makes a protein a protein? Hydrophobic core designs that specify stability and structural properties. Protein Science, 11(11), 2869-2881.

[3] Kárný Miroslav, Guy Tatiana V.: Fully probabilistic control design, Systems and Control Letters vol.55, 4 (2006), p. 259-265 [2006]

[4] Kárný Miroslav: Towards fully probabilistic control design. Automatica, 32(12):1719–1722, 1996
title: Learning From Incidents And Implementing Action: Exploring Expectations And Contradictions In The Energy Sector
Creators: name: Murphy, Vicky Louise
Publisher: name: The Open University
Year: 2020

description: Learning from incidents (LFI) is an organisational learning process whereby accidents or near-misses are used to stimulate learning in order to prevent similar events in the future. Prior research has demonstrated that an important step in LFI is the distribution of incident summaries to enable individuals, teams, networks and organisations to learn. These summaries should in theory support vicarious learning for those not directly involved in the original event. This thesis investigates the following major gaps in LFI literature: the role of networks in LFI, what practitioners perceive to be successful learning in the context of LFI, beneficial practices in LFI, and current barriers that prevent successful LFI. These gaps were investigated through a mixed method multi-case study design across three large energy organisations. The research explored the responses of over 160 participants to two surveys, and 45 semi-structured interviews. The first key finding, related to network use in LFI, was that, within each organisation, the structure of both formal and informal networks was dependent on contextual factors, such as geographical dispersal of workers. Within each of the organisations, employees use their networks in similar ways: to exchange information and to understand the connection between an incident and a worker’s own practice. The second key finding addressed the gap on what practitioners perceive to be successful learning through identifying a taxonomy of 24 learning objectives associated with LFI. The taxonomy included observable outcomes, such as changes in best practice, and included objectives necessary to foster an effective learning process, such as open communication. A finding related to beneficial practices in LFI was the identification of a unique approach to LFI within each of the three organisations: one organisation used technology to support communication related to LFI; another held safety events that considered multiple incidents related to a single process; the third created opportunities for workers from different teams to meet and discuss incidents through a variety of inter-departmental meetings. The final key finding of this research was the deduction of four contradictions observed across the three organisations that created barriers to learning: a lack of differentiation between safety and learning; perceived irrelevance of some incident alerts; inconsistent pedagogical support for learning; and an inability to differentiate between incidents that had occurred due to the probabilistic nature of events, or a lack of learning.
Phase slip in a superfluid Fermi gas near a Feshbach resonance
Creators: name: Yin, Lan
name: Ao, Ping
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In this paper, we study the properties of a phase slip in a superfluid Fermi gas near a Feshbach resonance. The phase slip can be generated by the phase imprinting method. Below the superfluid transition temperature, it appears as a dip in the density profile, and becomes more pronounced when the temperature is lowered. Therefore the phase slip can provide a direct evidence of the superfluid state. The condensation energy of the superfluid state can be extracted from the density profile of the phase slip, due to the unitary properties of the Fermi gas near the resonance. The width of the phase slip is proportional to the square root of the difference between the transition temperature and the temperature. The signature of the phase slip in the density profile becomes more robust across the BCS-BEC crossover.
description: 5 pages, 2 figures, the density profile of a phase slip under experimental conditions was calculated
Chemical evolution of local post-starburst galaxies: Implications for the mass-metallicity relation
Creators: name: Leung, Ho-Hin
name: Wild, Vivienne
name: Papathomas, Michail
name: Carnall, Adam
name: Zheng, Yirui
name: Boardman, Nicholas
name: Wang, Cara
name: Johansson, Peter H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the stellar fossil record to constrain the stellar metallicity evolution and star-formation histories of the post-starburst (PSB) regions within 45 local post-starburst galaxies from the MaNGA survey. The direct measurement of the regions' stellar metallicity evolution is achieved by a new two-step metallicity model that allows for stellar metallicity to change at the peak of the starburst. We also employ a Gaussian process noise model that accounts for correlated errors introduced by the observational data reduction or inaccuracies in the models. We find that a majority of PSB regions (69% at $>1σ$ significance) increased in stellar metallicity during the recent starburst, with an average increase of 0.8 dex and a standard deviation of 0.4 dex. A much smaller fraction of PSBs are found to have remained constant (22%) or declined in metallicity (9%, average decrease 0.4 dex, standard deviation 0.3 dex). The pre-burst metallicities of the PSB galaxies are in good agreement with the mass-metallicity relation of local star-forming galaxies. These results are consistent with hydrodynamic simulations, which suggest that mergers between gas-rich galaxies are the primary formation mechanism of local PSBs, and rapid metal recycling during the starburst outweighs the impact of dilution by any gas inflows. The final mass-weighted metallicities of the PSB galaxies are consistent with the mass-metallicity relation of local passive galaxies. Our results suggest that rapid quenching following a merger-driven starburst is entirely consistent with the observed gap between the stellar mass-metallicity relations of local star-forming and passive galaxies.
description: 19+5 pages, 8+4 figures, Published in MNRAS
Quantum thermodynamics in the interior of a Reissner-Nordström black-hole
Creators: name: Musmarra, Juan Ignacio
name: Bellini, Mauricio
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the interior of a Reissner-Nordström Black-Hole (RNBH) using Relativistic Quantum Geometry, which was introduced in some previous works. We found discrete energy levels for a scalar field from a polynomial condition for the Heun Confluent functions expanded around the effective causal radius $r_*$. From the solutions it is obtained that the uncertainty principle is valid for each energy level of space-time, in the form: $E_n\, r_{*,n}=\hbar/2$, and the charged mass is discretized and distributed in a finite number of states. The classical RNBH entropy is recovered as the limit case where the number of states is very large, and the RNBH quantum temperature depends on the number of states in the interior of the RNBH. This temperature, depending of the number of states of the RNBH, is related with the Bekeinstein-Hawking (BH) temperature: $T_{BH} \leq T_{N} < 2\,T_{BH}$.
Research Productivity of the Faculty Members in St. Xavier's College (Autonomous), Palayamkottai, Tirunelveli - A Scientometric Analysis from 1975 - 2019
Creators: name: Thangiah, Raja
name: Krishnan, Murugan
Publisher: name: figshare
Year: 2021
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications
subject: 80705 Informetrics

description: In the past few years evaluation of publications in peer reviewed journals and analysis of research productivity of the faculty members in various Institutions through scientometrics studies and bibliometric studies for identifying the quality researchers in the field of research and development. This study focused on the research productivity of the faculty members working at St. Xavier’s College (Autonomous), Palayamkottai, Tirunelveli from 1975 to 2019. The data were collected from the Scopus database from 1975 to 2019. After the analysis of the 693 publications in the above mentioned period, published through 273 sources, 1.53 collaboration index, and 92 articles published in the year 2012 is the highest publication of the year.
A Novel IoT Trust Model Leveraging Fully Distributed Behavioral Fingerprinting and Secure Delegation
Creators: name: Arazzi, Marco
name: Nicolazzo, Serena
name: Nocera, Antonino
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: With the number of connected smart devices expected to constantly grow in the next years, Internet of Things (IoT) solutions are experimenting a booming demand to make data collection and processing easier. The ability of IoT appliances to provide pervasive and better support to everyday tasks, in most cases transparently to humans, is also achieved through the high degree of autonomy of such devices. However, the higher the number of new capabilities and services provided in an autonomous way, the wider the attack surface that exposes users to data hacking and lost. In this scenario, many critical challenges arise also because IoT devices have heterogeneous computational capabilities (i.e., in the same network there might be simple sensors/actuators as well as more complex and smart nodes). In this paper, we try to provide a contribution in this setting, tackling the non-trivial issues of equipping smart things with a strategy to evaluate, also through their neighbors, the trustworthiness of an object in the network before interacting with it. To do so, we design a novel and fully distributed trust model exploiting devices' behavioral fingerprints, a distributed consensus mechanism and the Blockchain technology. Beyond the detailed description of our framework, we also illustrate the security model associated with it and the tests carried out to evaluate its correctness and performance.
Supplementary Material from Quasi-robust control of biochemical reaction networks via stochastic morphing
Creators: name: Plesa, Tomislav
name: Guy-Bart Stan
name: Ouldridge, Thomas E.
name: Wooli Bae
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60114 Systems Biology
subject: FOS: Biological sciences
subject: 60113 Synthetic Biology
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Background theory and mathematical analyses
Comprehensive study of the phase diagram of the spin-1/2 Kitaev-Heisenberg-Gamma chain
Creators: name: Yang, Wang
name: Nocera, Alberto
name: Affleck, Ian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A central question on Kitaev materials is the effects of additional couplings on the Kitaev model which is proposed to be a candidate for realizing topological quantum computations. However, two spatial dimension typically suffers the difficulty of lacking controllable approaches. In this work, using a combination of powerful analytical and numerical methods available in one dimension, we perform a comprehensive study on the phase diagram of a one-dimensional version of the spin-1/2 Kitaev-Heisenberg-Gamma model in its full parameter space. A strikingly rich phase diagram is found with nine distinct phases, including four Luttinger liquid phases, a ferromagnetic phase, a Néel ordered phase, an ordered phase of distorted-spiral spin alignments, and two ordered phase which both break a $D_3$ symmetry albeit in different ways, where $D_3$ is the dihedral group of order six. Our work paves the way for studying one-dimensional Kitaev materials and may provide hints to the physics in higher dimensional situations.
description: 53 pages, 29 figures
title: How is the connectivity of sole larvae affected by wind and temperature changes in the Southern North Sea? A modelling approach
Creators: name: Lacroix, Geneviève
name: Maes, Gregory E.
name: Bolle, Loes J.
name: Volckaert, Filip A.M.
Publisher: name: ASC 2012 - Theme session E
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Objective is to investigate the impact of climate change – temperature increase and wind magnitude/direction changes – on the recruitment and connectivity of sole larvae
USIA Poll # 1986-I86055: Nuclear Arms Control
Creators: name: USIA
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Following of news about international affairs (1); US/Soviet Union policies/actions (2); US/Soviet Union efforts to reach serious arms reduction agreements (2); comparison of US/Soviet Union military strength (2); descriptions of US President Ronald Reagan/Soviet leader Mikhail Gorbachev (5); meeting between US President Reagan and Soviet leader Gorbachev in Washington (2); Strategic Defense Initiative (3); anti-missile defense system (7); necessity of nuclear weapons (1); arms control negotiations (1); Soviet Union proposal for US/USS.R. to stop all testing of nuclear weapons (5); US invitation to the Soviet Union to send its own experts to observe/monitor underground nuclear testing (2); favor/oppose US-Soviet agreement to ban nuclear testing (1); SALT II violations (8); chemical weapons (2); actions taken to show position on disarmament/nuclear arms (1); general elections (2).
pi+ pi0 Mass Difference in the Hidden Local Symmetry: A Dynamical Origin of Little Higgs
Creators: name: Harada, Masayasu
name: Tanabashi, Masaharu
name: Yamawaki, Koichi
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate pi+ pi0 mass difference $Δm_π^2 \equiv m_{π^+}^2 -m_{π^0}^2$ in the Hidden Local Symmetry (HLS) model, based on the Wilsonian matching and Wilsonian renormalization-group equations. Even without a1 meson the result agrees well with the experiment in sharp contrast to the conventional approach where the a1 meson plays a crucial role. For large Nf QCD, there arises a large hierarchy between $Δm_π^2$ and the pi decay constant $F_π^2$, $Δm_π^2/F_π^2 \ll 1$, near the critical point where the chiral symmetry gets restored as the vector manifestation and the HLS model becomes a little Higgs model with two sites and two links, with the dynamically generated gauge coupling of the composite rho becoming vanishingly small.
description: 4 pages
Constraints for the accretion disk evaporation rate in AGN from the existence of the Broad Line Region
Creators: name: Czerny, B.
name: Rozanska, A.
name: Kuraszkiewicz, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze the consequences of the hypothesis that the formation of the Broad Line Region is intrinsically connected with the existence of the cold accretion disk. We assume that the Broad Line Region radius is well estimated by the formula of Kaspi et al. (2000). We consider three models of the disappearance of the inner disk which limit the existence of the Broad Line Region: (i) classical ADAF approach, i.e. the inner hot flow develops whenever it can exist (ii) disk evaporation model of Meyer & Meyer-Hofmeister (2002) (iii) generalized disk evaporation model of Rozanska & Czerny (2000b). For each of the models, we determine the minimum value of the Eddington ratio and the maximum value of the broad line widths as functions of the viscosity parameter alpha and the magnetic field parameter beta. We compare the predicted parameter space with observations of several AGN. Weak dependence of the maximum value of the FWHM and minimum value of the Eddington ratio on the black hole mass in our sample is noticeable. It seems to favor the description of the cold disk/hot inner flow transition as in the classical ADAF approach than with the model of disk evaporation due to conduction between the disk and accreting corona.
description: A&A, 428, 39 (2004)
Understanding of the Vortex Lattice Behavior Induced by Selective Removal of Atoms from a Bose-Einstein Condensate
Creators: name: Zhai, Hui
name: Zhou, Qi
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It is known that the quantized vortices in a superfluid can be described by a dual electromagnetic model through the duality transformation. Recently a new technique, which can selectively remove atoms from a Bose-Einstein condensate, was applied to the vortex lattice state of the rapid rotating Boson gases. The increase of vortex number, dynamical formation of giant vortex, the oscillation and damping of vortex motion were observed in these experiments. In this paper we will discuss these observations in the framework of dual description and show how to understood these observations naturally.
description: 10 pages, 3 figures, published version
Active Control of Polariton-Enabled Long-Range Energy Transfer
Creators: name: Cargioli, A.
name: Lednev, M.
name: Lavista, L.
name: Camposeo, A.
name: Sassella, A.
name: Pisignano, D.
name: Tredicucci, A.
name: Garcia-Vidal, F. J.
name: Feist, J.
name: Persano, L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Optical control is achieved on the excited state energy transfer between spatially separated donor and acceptor molecules, both coupled to the same optical mode of a cavity. The energy transfer occurs through the formed hybrid polaritons and can be switched on and off by means of ultraviolet and visible light. The control mechanism relies on a photochromic component used as donor, whose absorption and emission properties can be varied reversibly through light irradiation, whereas in-cavity hybridization with acceptors through polariton states enables a 6-fold enhancement of acceptor/donor contribution to the emission intensity with respect to a reference multilayer. These results pave the way for synthesizing effective gating systems for the transport of energy by light, relevant for light-harvesting and light-emitting devices, and for photovoltaic cells.
description: 54 pages, 41 Figures, Nanophotonics 2024
Arithmetic invariants from Sato--Tate moments
Creators: name: Costa, Edgar
name: Fité, Francesc
name: Sutherland, Andrew V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M50 (Primary) 11G10, 14K15 (Secondary)

description: We give some arithmetic-geometric interpretations of the moments M_2[a_1], M_1[a_2], and M_1[s_2] of the Sato-Tate group of an abelian variety A defined over a number field by relating them to the ranks of the endomorphism ring and Néron-Severi group of A.
description: 4 pages
title: Effect of marine protected areas on the spatial and temporal distribution of yellowtail flounder (limanda ferruginea) on georges bank
Creators: name: Rosellón-Druker, Judith
name: Hyun, Saang-Yoon
name: Cadrin, Steven X.
Publisher: name: ASC 2012 - Theme session E
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Some of the most important tools for fisheries management are marine protected areas (MPAs). However, assessing the effect of MPAs remains an important challenge in fisheries science. We analyzed fisheryindependent survey data for Georges Bank (GB) yellowtail flounder from 1984 to 2004 in three specific locations: open areas to fishing, closed area I (CAI), and closed area II (CAII). We found a four-fold increase in the catch per unit effort (CPUE) in open areas after implementation of MPAs. In the case of CAI, the CPUE was similar before and after its implementation. For CAII, the CPUE increased five-fold after its implementation. Environmental conditions (temperature, depth and sediment type) were analyzed in the three areas. For this species we observed a preference for sandy substrate, relatively high temperatures (12-16ºC) and depths
Sum rule for a difference of proton and neutron total photoproduction cross-sections
Creators: name: Bartos, E.
name: Kuraev, E. A.
name: Dubnicka, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Starting from very high energy inelastic electron-nucleon scattering with a production of a hadronic state $X$ to be moved closely to the direction of the initial nucleon, then utilizing analytic properties of parts of forward virtual Compton scattering amplitudes on proton and neutron, one obtains the relation between nucleon form factors and a difference of proton and neutron differential electroproduction cross-sections. In particular, for the case of small transferred momenta, one finally derives sum rule, relating Dirac proton mean square radius and anomalous magnetic moments of proton and neutron to the integral over a difference of the total proton and neutron photoproduction cross-sections.
description: LaTeX2e, 7 pages, 1 eps figure (revised version)