cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Long-term dynamics in eastern Baltic cod spawning time: from small scale reversible changes to a recent drastic shift
Creators: name: Karasiova, E. M.
name: Voss, R.
name: Eero, M.
Publisher: name: ASC 2008 - Theme session J
Year: 2024
Subjects: Baltic Sea (ICES Ecoregion)
Oceanic Northeast Atlantic (ICES Ecoregion)
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Significant changes occurred in the state of the eastern Baltic cod population at the end of 20th century which, among others, resulted in a shift in peak spawning time from spring to summer months. We investigated long-term dynamics (1949-present) of cod spawning time based on ichthyoplankton data for all 3 major Baltic spawning grounds (Bornholm Basin, Gdansk Deep, Gotland Basin). Considerable amounts of cod eggs were already registered in March – April for the whole period 1949-1980. Peak spawning time, however, showed multiple, reversible changes from spring (March-April 1949-55; 1971-80) to summer (June-July 1956-59; 1962-70). These fluctuations occurred in all three spawning grounds. During this period, timing of spawning was correlated to the size of the reproductive volume (RV) in February-April, with a high RV being indicative of early spawning. In mid 1990s peak spawning time showed for the first time a drastic change to July-August. Stock structure (numbers at age) of the Baltic cod stock is analysed back to 1949 and inter-dependencies to spawning time investigated. One major consequence of shifts in spawning time could be changes of species composition and sizedistribution of food items available for cod larvae. Seasonal changes of abundance and sizedistribution of the major food source for cod larvae, i.e. nauplii of Pseudocalanus acuspes are presented for different spawning grounds. Indications for a possible contribution of late spawning on the decrease of cod stock productivity are discussed
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 5: minor western margin continued E
Quantum mechanical probabilities and general probabilistic constraints for Einstein-Podolsky-Rosen-Bohm experiments
Creators: name: Cereceda, Jose L.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Relativistic causality, namely, the impossibility of signaling at superluminal speeds, restricts the kinds of correlations which can occur between different parts of a composite physical system. Here we establish the basic restrictions which relativistic causality imposes on the joint probabilities involved in an experiment of the Einstein-Podolsky-Rosen-Bohm type. Quantum mechanics, on the other hand, places further restrictions beyond those required by general considerations like causality and consistency. We illustrate this fact by considering the sum of correlations involved in the CHSH inequality. Within the general framework of the CHSH inequality, we also consider the nonlocality theorem derived by Hardy, and discuss the constraints that relativistic causality, on the one hand, and quantum mechanics, on the other hand, impose on it. Finally, we derive a simple inequality which can be used to test quantum mechanics against general probabilistic theories.
description: LaTeX, 16 pages, no figures; Final version, to be published in Found. Phys. Letters
A synthesis of plant invasion control: important factors to consider when choosing a control method
Creators: name: Sobuj, Norul
name: Byun, Chaeho
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Science Policy
subject: Developmental Biology
subject: Plant Biology

description: Experimental studies on invasive plant control often involve a small number of invasive plants and are conducted in a particular habitat. Moreover, different invasive plant control strategies vary among studies. Therefore, it is difficult to identify the best control method when considering the individual studies separately. Here, we conduct a systematic review to find a general pattern about the most widely used measures for controlling invasive plants, based on their growth habits and invaded habitats, and explore how different control strategies vary across different experimental studies. This information may guide us to improve our control efficiency. We found that herbicide application was the most preferred method for controlling invasive plants, regardless of their growth habit and habitat type. On the other hand, the selection of an appropriate non-chemical control method depended on the growth habit and habitat of the invasive plant. In the majority of experimental studies, control treatments were applied once, and the responses of invasive plants were monitored over one growing season. Based on these results, we discuss the merits and demerits of the most widely used control methods and provide recommendations for deciding on an effective control method.
Information Bottleneck in Control Tasks with Recurrent Spiking Neural Networks
Creators: name: Vasu, Madhavun Candadai
name: Izquierdo, Eduardo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Information Theory (cs.IT)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: The nervous system encodes continuous information from the environment in the form of discrete spikes, and then decodes these to produce smooth motor actions. Understanding how spikes integrate, represent, and process information to produce behavior is one of the greatest challenges in neuroscience. Information theory has the potential to help us address this challenge. Informational analyses of deep and feed-forward artificial neural networks solving static input-output tasks, have led to the proposal of the \emph{Information Bottleneck} principle, which states that deeper layers encode more relevant yet minimal information about the inputs. Such an analyses on networks that are recurrent, spiking, and perform control tasks is relatively unexplored. Here, we present results from a Mutual Information analysis of a recurrent spiking neural network that was evolved to perform the classic pole-balancing task. Our results show that these networks deviate from the \emph{Information Bottleneck} principle prescribed for feed-forward networks.
description: Accepted at ICANN'17 to appear in Springer Lecture Notes in Computer Science
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 5: minor western margin continued B
Grazing and right-of-way affect native rangeland 12 years after pipeline construction in southern Alberta
Creators: name: Ostermann, D. Kelly
name: Dhar, Amalesh
name: Naeth, M. Anne
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: Over the past 100 years, large areas of native grasslands have been lost due to human activities and natural disturbances. Construction of pipelines for oil and gas transportation continues to pose significant challenges to grassland ecosystems. Thus, reclamation of disturbed native grasslands is critical for their existence in North America and around the world. This study investigated long-term (12 years) effects of grazing and right-of-way (RoW) treatments on revegetation of native rangeland on two pipelines in southeastern Alberta, Canada. Grazing and RoW treatments influenced soil and vegetation parameters; and plant species group responded differently at Milo and Porcupine Hills. Grazing was associated with significantly greater bare ground and decreased litter at both sites and increased vegetation cover at Porcupine Hills. At Milo grass density and biovolume increased as RoW disturbance increased, but not at Porcupine Hills. Trenching increased rhizomatous grasses and all RoW disturbances reduced tufted grasses. Vegetation was dissimilar on the RoW from undisturbed prairie with intermediate levels of disturbance (work, storage) having greater plant species diversity, whereas grazing had no effect. This study suggests 12 years may not be long enough for restoration of native rangelands after pipeline construction although there was some progress.
Periodic orbits around a spherically symmetric naked singularity
Creators: name: Babar, Gulmina Zaman
name: Babar, Adil Zaman
name: Lim, Yen-Kheng
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The motion of time-like test particles in the Fisher/Janis-Newman-Winicour (F/JNW) spacetime is studied with the Hamiltonian formulation of the geodesic equations. The spacetime is characterised by its mass parameter $r_g$ and scalar field parameter $ν$. The innermost bound and stable circular orbits are calculated and the effective potential is analysed. Consistent with numerical results in earlier literature, for $ν<1/2$, particles with non-zero angular momentum encounter an infinite potential barrier, preventing them from reaching the naked singularity at $r=r_g$. Periodic orbits in the spacetime are also obtained. Compared to the periodic orbits around the Schwarzschild black hole, it is found that typically lower energies are required for the same orbits in the F/JNW spacetime.
description: 14 pages, 7 figures
Self-Adjointness of the Dirac Hamiltonian and Fermion Number Fractionization in the Background of a Singular Magnetic Vortex
Creators: name: Sitenko, Yu. A.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The method of self-adjoint extensions is employed to determine the vacuum quantum numbers induced by a singular static magnetic vortex in $2+1$-dimensional spinor electrodynamics. The results obtained are gauge-invariant and, for certain values of the extension parameter, both periodic in the value of the vortex flux and possessing definite parity with respect to the charge conjugation.
description: LaTeX
title: Environmental factors influencing macrobenthic biodiversity and bioturbation in the Estuary and Gulf of St. Lawrence, Canada
Creators: name: Belley, Rénald
name: Archambault, Philippe
name: Sundby, Bjorn
name: Gilbert, Franck
Publisher: name: ASC 2008 - Theme session J
Year: 2024
Subjects: Baltic Sea (ICES Ecoregion)
Oceanic Northeast Atlantic (ICES Ecoregion)
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Many marine habitats are presently under pressure by multiple anthropogenic threats. Changes in environmental parameters near the seabed, such as a decrease in the oxygen concentration or an increase in the organic carbon loading, can have negative impacts on biological activity and diversity. Studies have shown that such changes are now taking place in the Estuary and Gulf of St. Lawrence (EGSL). We photographed the seabed at 11 stations in the EGSL during the summers of 2006 and 2007 and analysed 162 images to identify surface manifestations (traces) of bioturbation and identify the macrobenthic organisms that were present. The objectives of this study were 1) to determine the environmental factors influencing the macrobenthic biodiversity and the abundance and diversity of bioturbation traces (or lebensspuren) in the EGSL, and 2) to determine if there is a significant difference between stations with high, medium and low oxygen saturation. Our results show an increase of the area covered by total traces and by surface traces as the oxygen decreases. We also found high densities of Ophiura sp. in hypoxic areas of the EGSL. This could indicate a gradual replacement of hypoxic non tolerant species, responsible for 2 most relief traces, by hypoxic tolerant species, responsible for most surface traces, as Ophiura sp
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 4: major western margin continued C.
Spin-Valley Coherent Phases of the $ν=0$ Quantum Hall State in Bilayer Graphene
Creators: name: Murthy, Ganpathy
name: Shimshoni, Efrat
name: Fertig, Herbert
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Bilayer graphene (BLG) offers a rich platform for broken symmetry states stabilized by interactions. In this work we study the phase diagram of BLG in the quantum Hall regime at filling factor $ν=0$ within the Hartree-Fock approximation. In the simplest non-interacting situation this system has eight (nearly) degenerate Landau levels near the Fermi energy, characterized by spin, valley, and orbital quantum numbers. We incorporate in our study two effects not previously considered: (i) the nonperturbative effect of trigonal warping in the single-particle Hamiltonian, and (ii) short-range SU(4) symmetry-breaking interactions that distinguish the energetics of the orbitals. We find within this model a rich set of phases, including ferromagnetic, layer-polarized, canted antiferromagnetic, Kekulé, a "spin-valley entangled" state, and a "broken U(1) $\times$ U(1)" phase. This last state involves independent spontaneous symmetry breaking in the layer and valley degrees of freedom, and has not been previously identified. We present phase diagrams as a function of interlayer bias $D$ and perpendicular magnetic field $B_{\perp}$ for various interaction and Zeeman couplings, and discuss which are likely to be relevant to BLG in recent measurements. Experimental properties of the various phases and transitions among them are also discussed.
description: More references and discussion added compared to v1
ATCA search for 21 cm emission from a candidate damped Ly-$α$ absorber at z = 0.101
Creators: name: Kanekar, Nissim
name: Chengalur, Jayaram N
name: Subrahmanyan, Ravi
name: Petitjean, Patrick
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a deep search for 21 cm emission/absorption from the $z \sim 0.101$ candidate damped Lyman-$α$ system towards PKS 0439-433, using the Australia Telescope Compact Array (ATCA). The spectrum shows a weak absorption feature --- at the $3.3 σ$ level --- which yields a lower limit of 730 K on the spin temperature of the system. No HI emission was detected: the $3σ$ upper limit on the HI mass of the absorber is $2.25 \times 10^9 M_{\odot}$, for a velocity spread of $\sim 70$ km s$^{-1}$. The low HI mass and the high spin temperature seem to rule out the possibility that the absorber is a large gas-rich spiral galaxy.
description: 5 pages, 4 figures. Accepted by Astronomy and Astrophysics
title: Fisheries-induced evolution of body size and other life history traits:the impact of gear selectivity
Creators: name: Boukal, David S.
name: Dunlop, Erin S.
name: Heino, Mikko
name: Dieckmann, Ulf
Publisher: name: ASC 2008 - Theme session F
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.Commercial fishing utilizes a variety of gears, all of which are selective with respect to at least some phenotypic characteristics of individuals such as body size or girth. Empirical evidence is mounting that such fishing induces rapid evolutionary changes, with consequences for the size structure and dynamics of the exploited stocks. Here we present the results of life-history models designed to study fisheries-induced evolutionary changes in body size at maturation, growth, and reproduction in a stock fished by different gear types. We examine evolutionary endpoints of, and selection pressures on, three corresponding life-history traits. We show that fishing usually selects for earlier maturation at smaller size, higher reproductive investment, and faster growth. This is especially true for trawl-like gears, which are primarily size-selective and remove large fish. On the other hand, gears that only remove fish within a certain size slot, such as gillnets, can lead to evolutionary bistability and evolution of delayed maturation. Moreover, gears that are also directly selective on behavioral traits influencing growth, such as baited lines, can lead to slower growth. Our results also highlight how the evolutionary effects of fishing are sensitive to changes in mesh size and fishing mortality, commonly regulated in fisheries management.
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 3: minor eastern margin A.
Dissipative instabilities in a partially ionised prominence plasma slab: II. The effect of compressibility
Creators: name: Mather, J. F.
name: Ballai, I.
name: Erdelyi, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This present study deals with the dissipative instability that appears in a compressible partially ionised plasma slab embedded in a uniform magnetic field, modelling the state of the plasma in solar prominences. In the partially ionised plasma, the dominant dissipative effect is the Cowling resistivity. The regions outside the slab (modelling the solar corona) are fully ionised, and the dominant mechanism of dissipation is viscosity. Analytical solutions to the extended magnetohydrodynamic (MHD) equations are found inside and outside of the slab and solutions are matched at the boundaries of the slab. The dispersion relation is derived and solutions are found analytically in the slender slab limit, while the conditions necessary for the appearance of the instability is investigated numerically for the entire parameter space. Our study is focussed on the effect of the compressibility on the generation and evolution of instabilities. We find that compressibility reduces the threshold of the equilibrium flow, where waves can be unstable, to a level that is comparable to the internal cusp speed, which is of the same order of flow speeds that are currently observed in solar prominences. Our study addresses only the slow waves, as these are the most likely perturbations to become unstable, however the time-scales of the instability are found to be rather large ranging from $10^5$-$10^7$ seconds. It is determined that the instability threshold is further influenced by the concentration of neutrals and the strength of the viscosity of the corona. Interestingly, these two latter aspects have opposite effects. Our numerical analysis shows that the interplay between the equilibrium flow, neutrals and dispersion can change considerably the nature of waves.
The Multiple Access Channel with Feedback and Correlated Sources
Creators: name: Ong, Lawrence
name: Motani, Mehul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we investigate communication strategies for the multiple access channel with feedback and correlated sources (MACFCS). The MACFCS models a wireless sensor network scenario in which sensors distributed throughout an arbitrary random field collect correlated measurements and transmit them to a common sink. We derive achievable rate regions for the three-node MACFCS. First, we study the strategy when source coding and channel coding are combined, which we term full decoding at sources. Second, we look at several strategies when source coding and channel coding are separated, which we term full decoding at destination. From numerical computations on Gaussian channels, we see that different strategies perform better under certain source correlations and channel setups.
description: Proceedings of the 2006 IEEE International Symposium on Information Theory (ISIT 2006), The Westin Seattle, Seattle, Washington, July 9-14 2006
The Capacity of the Single Source Multiple Relay Single Destination Mesh Network
Creators: name: Ong, Lawrence
name: Motani, Mehul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we derive the capacity of a special class of mesh networks. A mesh network is defined as a heterogeneous wireless network in which the transmission among power limited nodes is assisted by powerful relays, which use the same wireless medium. We find the capacity of the mesh network when there is one source, one destination, and multiple relays. We call this channel the single source multiple relay single destination (SSMRSD) mesh network. Our approach is as follows. We first look at an upper bound on the information theoretic capacity of these networks in the Gaussian setting. We then show that the bound is achievable asymptotically using the compress-forward strategy for the multiple relay channel. Theoretically, the results indicate the value of cooperation and the utility of carefully deployed relays in wireless ad-hoc and sensor networks. The capacity characterization quantifies how the relays can be used to either conserve node energy or to increase transmission rate.
description: Proceedings of the 2006 IEEE International Symposium on Information Theory (ISIT 2006), The Westin Seattle, Seattle, Washington, July 9-14 2006
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 4: major western margin continued E.
Spin dynamics in helical molecules with non-linear interactions
Creators: name: Diaz, E.
name: Albares, P.
name: Estevez, P. G.
name: Cervero, J. M.
name: Gaul, C.
name: Diez, E.
name: Dominguez-Adame, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is widely admitted that the helical conformation of certain chiral molecules may induce a sizable spin selectivity observed in experiments. Spin selectivity arises as a result of the interplay between a helicity-induced spin-orbit coupling and electric dipole fields in the molecule. From the theoretical point of view, different phenomena might affect the spin dynamics in helical molecules, such as quantum dephasing, dissipation and the role of metallic contacts. Previous studies neglected the local deformation of the molecule about the carrier thus far, but this assumption seems unrealistic to describe charge transport in molecular systems. We introduce an effective model describing the electron spin dynamics in a deformable helical molecule with weak spin-orbit coupling. We find that the electron-lattice interaction allows the formation of stable solitons such as bright solitons with well defined spin projection onto the molecule axis. We present a thorough study of these bright solitons and analyze their possible impact on the spin dynamics in deformable helical molecules.
title: Length-based Approaches compared to Age-based Approaches to Determining the Significance of Grey Seal Feeding on Cod in ICES Division VIa
Creators: name: Pope, John G.
name: Holmes, Steven J.
Publisher: name: ASC 2008 - Theme session F
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.Grey seal, Scat sampling, seal feeding, cod
Binary stripping as a plausible origin of correlated pairs of extreme trans-Neptunian objects
Creators: name: Marcos, C. de la Fuente
name: Marcos, R. de la Fuente
name: Aarseth, S. J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Asteroids that follow similar orbits may have a dynamical connection as their current paths could be the result of a past interaction with a massive perturber. The pair of extreme trans-Neptunian objects or ETNOs (474640) 2004 VN112-2013 RF98 exhibits peculiar relative orbital properties, including a difference in longitude of the ascending node of just 1.61 degrees and 3.99 degrees in inclination. In addition, their reflectance spectra are similar in the visible portion of the spectrum. The origin of these similarities remains unclear. Neglecting observational bias, viable scenarios that could explain this level of coincidence include fragmentation and binary dissociation. Here, we present results of extensive direct N-body simulations of close encounters between wide binary ETNOs and one trans-Plutonian planet. We find that wide binary ETNOs can dissociate during such interactions and the relative orbital properties of the resulting unbound couples match reasonably well those of several pairs of known ETNOs, including 474640-2013 RF98. The possible presence of former binaries among the known ETNOs has strong implications for the interpretation of the observed anisotropies in the distributions of the directions of their orbital poles and perihelia.
description: 21 pages, 13 figures, 1 table, revised to match version published in Astrophysics and Space Science
Supersymmetry and Noncommutative Geometry
Creators: name: Kalau, W.
name: Walze, M.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The purpose of this article is to apply the concept of the spectral triple, the starting point for the analysis of noncommutative spaces in the sense of A.~Connes, to the case where the algebra $\cA$ contains both bosonic and fermionic degrees of freedom. The operator $\cD$ of the spectral triple under consideration is the square root of the Dirac operator und thus the forms of the generalized differential algebra constructed out of the spectral triple are in a representation of the Lorentz group with integer spin if the form degree is even and they are in a representation with half-integer spin if the form degree is odd. However, we find that the 2-forms, obtained by squaring the connection, contains exactly the components of the vector multiplet representation of the supersymmetry algebra. This allows to construct an action for supersymmetric Yang-Mills theory in the framework of noncommutative geometry.
description: 26pp., LaTeX
A low cost chromatic modulation, dust sensor based real time respirable particulate and black carbon monitor, a preliminary design
Creators: name: A, Nishadh K
name: Mohanraj R
name: A, Azeez P
Publisher: name: Zenodo
Year: 2013

description: Apart from their impacts on climatic variables, anthropogenic particulate and black carbon emissions have serious health effects. Real time monitoring of these pollutants have huge potential in providing relevant health advisories and enforcing time bound regulatory restrictions. High upfront and running costs for commercial monitors for these parameters with adequate spatial and temporal resolution largely hinder their wide deployment. Recent technological developments in micro electro-mechanical systems provides huge cost reduction in instrument components for monitors working based on optical differentiation and paves the way to much cheaper chromatic modulation (color variation) based monitors. Several recent studies showed promising features of those kinds of low cost monitors in particulate and black carbon monitoring (1, 2, 3). The present paper deals with design of a low cost real time monitor for particulate and black carbon by a dust sensor coupled with chromatic modulation technique. The monitor comprises a rotational 10 micrometer particulate filter with web camera to capture the dust accumulation for chromatic modulation analysis, a column with dust sensor and light source, a vacuum air pump and a microprocessor to program the whole monitoring processes. The main contribution of this design is the coupling of optical property differentiation, chromatic modulation technique in single platform and introduction of invasive sampling features for particulate monitoring. The dust sensor SHARP GP2Y1010AU0F is based on optical sensing which measures the quantity of dust particles by reflected infrared rays on phototransistors from a dust column. Black carbon is quantified in chromatic modulation by measuring the colour variation in dust filter though image colour algorithmic method (3). By following the PIXIE streaker sampler design the present monitors introduce the invasive sampling feature, which delivers the further analysis of filtered dust particles for heavy metals or other chemical component for further research. Reference: YR Kolupula, MA Aceves-Fernandez, GR Jones, AG Deakin and JW Spencer (2010). Airborne particle monitoring with urban closed-circuit television camera networks and a chromatic technique. Measurement Science and Technology 21, 115204. N Ramanathan, M Lukac, T Ahmed, A Kar, PS Praveen, T Honles, I Leong , IH Rehman, JJ Schauer and V Ramanathan (2011). A cell phone based system for large-scale monitoring of black carbon. Atmospheric Environment 45, 4481-4487. TS Dye (2013). A Scientist with Sensors and Spare Time: Backyard Comparisons of Particulate Matter Sensors. (Abstract). EPA’s Next Generation Air Monitoring Workshop Series Air Sensors 2013: Data Quality & Applications.
description: Poster presentation in IITM-WMO seminar on Metropolitan Air Quality Forecasting and Services (SAFAR). Indian Institute of Tropical Meteorology, Pune, 30th April 2013.
title: Predictive modeling of sediment response to hypoxia in the Gulf of St. Lawrence
Creators: name: Katsev, Sergei
name: Chaillou, Gwénaëlle
name: Sundby, Bjørn
name: Mucci, Alfonso
Publisher: name: ASC 2008 - Theme session L
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.We use a reaction-transport sediment model to examine the effects of progressive oxygen depletion on sediment geochemistry and fluxes. The model includes physical, geochemical, and biological processes and was calibrated using the geochemical data acquired over the last 30 yr in the lower St. Lawrence River Estuary (Canada). Due to an increased nutrient input, as well as changes in the composition of water masses entering the Gulf of St. Lawrence, the concentration of oxygen in the bottom water at that location has been decreasing at an average rate of 1 mmol/L/yr over the past 70 yr. Modeled benthic fluxes match those obtained in shipboard sediment incubations. For an assumed scenario of further oxygen depletion, we project the fluxes and sediment distributions of iron, manganese, phosphorus, nitrogen, and sulfur for the next 60 years: the fluxes of reduced substances out of the sediment will increase, reactive iron and manganese oxides will become depleted, and the sediment will become progressively enriched in iron sulfides. The projections are sensitive to the effects of oxygen deficiency on benthic organisms. We compare a gradual response of benthic bioturbation/bioirrigation to a threshold-type response and discuss how biological processes in the benthic layer can be parameterized for modeling purposes. As a next step, the sediment model is being coupled to a large-scale hydrodynamic model for the Gulf of St. Lawrence. Accordingly, we discuss the strategies for model adjustments that optimize computer time without sacrificing the accuracy of benthic flux calculations.
Disantangling the effects of Doppler velocity and primordial non-Gaussianity in galaxy power spectra
Creators: name: Abramo, L. Raul
name: Bertacca, Daniele
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the detectability of large-scale velocity effects on galaxy clustering, by simulating galaxy surveys and combining the clustering of different types of tracers of large-scale structure. We employ a set of lognormal mocks that simulate a $20.000$ deg$^2$ near-complete survey up to $z=0.8$, in which each galaxy mock traces the spatial distribution of dark matter of that mock with a realistic bias prescription. We find that the ratios of the monopoles of the power spectra of different types of tracers carry most of the information that can be extracted from a multi-tracer analysis. In particular, we show that with a multi-tracer technique it will be possible to detect velocity effects with $\gtrsim 3 σ$. Finally, we investigate the degeneracy of these effects with the (local) non-Gaussianity parameter $f_{\rm NL}$, and how large-scale velocity contributions could be mistaken for the signatures of primordial non-Gaussianity.
description: 17 pages, 25 figures
title: ADCO, Cartulaire de Fontenay, second fragment (XIIIe siècle), Cart. 201 (15 H 9), folios 47-142, f. 029v
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2009
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire de Fontenay, second fragment (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 201 (15 H 9), folios 47-142. Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Fontenay, second fragment (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 201 (15 H 9), folios 47-142, f. 029v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb119679755
description: Provenance: https://www.geonames.org/7874015
description: Provenance: http://www.idref.fr/027691802/id
description: Provenance: abbaye de Fontenay
description: Provenance: http://www.wikidata.org/entity/Q464918
Invasion by Hyptis suaveolens modifies the effects of altered rainfall variability on nutrient cycling across seasons in a dry tropical grassland experiment
Creators: name: Afreen, Talat
name: Rajak, Prakash
name: Singh, Hema
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: Ecosystems often recover rapidly when changes in climatic conditions are moderate, but extreme changes may push the ecosystem beyond its biological threshold, resulting in rather profound changes in its functioning and species composition. We experimentally evaluated how the ecosystem functioning of tropical grassland may change under changing precipitation variability by investigating shifts in soil properties and their relation to plant invasions. We found that soil moisture, soil pH, inorganic N content (NO3 - N + NH4 - N), N mineralization rate, and soil CO2 flux increase with a rise in rainfall. Moreover, the grassland plots invaded by Hyptis suaveolens, particularly those with increased precipitation, demonstrated elevated mineralization rates, substantial nutrient accumulation, and a reduced microbial biomass in comparison to the uninvaded plots. Our study highlighted that, following soil moisture (SM) and soil temperature (ST), N mineralization emerged as the third primary driver of soil CO2 flux. Enhanced precipitation led to increased N mineralization and subsequent CO2 emissions. The results indicate that escalated CO2 flux in invaded plots could be linked to invasive H. suaveolens adverse effects on soil processes, potentially leading to short-term inefficient nutrient cycling and elevated CO2 emissions, with potential consequences for the overall stability of the ecosystem.
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 3: minor eastern margin continued B
Controlling decoherence of a two-level-atom in a lossy cavity
Creators: name: Thorwart, M.
name: Hartmann, L.
name: Goychuk, I.
name: Hänggi, P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By use of external periodic driving sources, we demonstrate the possibility of controlling the coherent as well as the decoherent dynamics of a two-level atom placed in a lossy cavity. The control of the coherent dynamics is elucidated for the phenomenon of coherent destruction of tunneling (CDT), i.e., the coherent dynamics of a driven two-level atom in a quantum superposition state can be brought practically to a complete standstill. We study this phenomenon for different initial preparations of the two-level atom. We then proceed to investigate the decoherence originating from the interaction of the two-level atom with a lossy cavity mode. The loss mechanism is described in terms of a microscopic model that couples the cavity mode to a bath of harmonic field modes. A suitably tuned external cw-laser field applied to the two-level atom slows down considerably the decoherence of the atom. We demonstrate the suppression of decoherence for two opposite initial preparations of the atomic state: a quantum superposition state as well as the ground state. These findings can be used to the effect of a proficient battling of decoherence in qubit manipulation processes.
description: 12 pages including 3 figures, submitted for publication
Polarization Observables using Positron Beams
Creators: name: Schmidt, Axel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The discrepancy between polarized and unpolarized measurements of the proton's electromagnetic form factors is striking, and suggests that two-photon exchange (TPE) may be playing a larger role in elastic electron-proton scattering than is estimated in standard radiative corrections formulae. While TPE is difficult to calculate in a model-independent way, it can be determined experimentally from asymmetries between electron-proton and positron-proton scattering. The possibility of a polarized positron beam at Jefferson Lab would open the door to measurements of TPE using polarization observables. In these proceedings, I examine the feasibility of measuring three such observables with positron scattering. Polarization-transfer, specifically the $ε$-dependence for fixed $Q^2$, is an excellent test of TPE, and the ability to compare electrons and positrons would lead to a drastic reduction of systematics. However, such a measurement would be severely statistically limited. Normal single-spin asymmetries (SSAs) probe the imaginary part of the TPE amplitude and can be improved by simultaneous measurements with electron and positron beams. Beam-normal SSAs are too small to be measured with the proposed polarized positron beam, but target-normal SSAs could be feasibly measured with unpolarized positrons in the spectrometer halls. This technique should be included in the physics case for developing a positron source for Jefferson Lab.
description: 7 pages, 4 figures, proceedings of the 2017 International Workshop on Physics with Positrons at Jefferson Lab, September 12-15, 2017
title: Disentangling variation in fish growth: Evidence for size-selective fishing insouthern Gulf of St. Lawrence cod (Gadus morhua)
Creators: name: Neuheimer, Anna B.
name: Taggart, C.T.
name: Hanson, J.M.
Publisher: name: ASC 2008 - Theme session J
Year: 2024
Subjects: Baltic Sea (ICES Ecoregion)
Oceanic Northeast Atlantic (ICES Ecoregion)
Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.We employ an integrated temperature metric (growing degreedays) and disentangle the effects of temperature, food consumption and size-selective fishing on size-at-age among years and year-classes over the three-decade period. We conclude the declines are most parsimoniously explained by size-selective fishing, consistent with other studies using different methods, and coincident with another gadoid population in the North Atlantic (haddock, Melanogrammus aeglefinus).
Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools
Creators: name: Jaju, Marwan M.
name: Haydon P. Mort
name: Nader, Fadi N.
name: Filho, Mário L.
name: Macdonald, David I.M.
Publisher: name: Geological Society of London
Year: 2018
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table 3: major eastern margin continued B.
The One Loop Effective Super-Potential and Non-Holomorphicity
Creators: name: Pickering, Austin
name: West, Peter
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the Kahlerian and the lowest order non-Kahlerian contributions to the one loop effective superpotential using super-Feynman graphs in the massless Wess-Zumino Model, the massive Wess-Zumino Model and N=1, U(1) gauge theory. We also calculate the Kahlerian term in Yang-Mills Theory for a general gauge group. Using this latter result we find the one loop Kahlerian contribution for N=2 Yang-Mills Theory in terms of N=1 superfields and we show that it can only come from non-holomorphic contributions to the N=2 effective potential.
description: LaTeX, 10 pages, 7 figures, uses bezier.sty and ifthen.sty. First amendment. The results are extended to include the Kahlerian term for a general renormalisable N=1 supersymmetric theory, containing Wess-Zumino and Yang-Mills multiplets with a cubic superpotential. One reference has been changed and one has been added. Second amendment. One acknowledgment has been altered in the `note added in proof'
Euclid: Superluminous supernovae in the Deep Survey
Creators: name: Inserra, C.
name: Nichol, R. C.
name: Scovacricchi, D.
name: Amiaux, J.
name: Brescia, M.
name: Burigana, C.
name: Cappellaro, E.
name: Carvalho, C. S.
name: Cavuoti, S.
name: Conforti, V.
name: Cuillandre, J. -C.
name: da Silva, A.
name: De Rosa, A.
name: Della Valle, M.
name: Dinis, J.
name: Franceschi, E.
name: Hook, I.
name: Hudelot, P.
name: Jahnke, K.
name: Kitching, T.
name: Kurki-Suonio, H.
name: Lloro, I.
name: Longo, G.
name: Maiorano, E.
name: Maris, M.
name: Rhodes, J. D.
name: Scaramella, R.
name: Smartt, S. J.
name: Sullivan, M.
name: Tao, C.
name: Toledo-Moreo, R.
name: Tereno, I.
name: Trifoglio, M.
name: Valenziano, L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the last decade, astronomers have found a new type of supernova called `superluminous supernovae' (SLSNe) due to their high peak luminosity and long light-curves. These hydrogen-free explosions (SLSNe-I) can be seen to z~4 and therefore, offer the possibility of probing the distant Universe. We aim to investigate the possibility of detecting SLSNe-I using ESA's Euclid satellite, scheduled for launch in 2020. In particular, we study the Euclid Deep Survey (EDS) which will provide a unique combination of area, depth and cadence over the mission. We estimated the redshift distribution of Euclid SLSNe-I using the latest information on their rates and spectral energy distribution, as well as known Euclid instrument and survey parameters, including the cadence and depth of the EDS. We also applied a standardization method to the peak magnitudes to create a simulated Hubble diagram to explore possible cosmological constraints. We show that Euclid should detect approximately 140 high-quality SLSNe-I to z ~ 3.5 over the first five years of the mission (with an additional 70 if we lower our photometric classification criteria). This sample could revolutionize the study of SLSNe-I at z>1 and open up their use as probes of star-formation rates, galaxy populations, the interstellar and intergalactic medium. In addition, a sample of such SLSNe-I could improve constraints on a time-dependent dark energy equation-of-state, namely w(a), when combined with local SLSNe-I and the expected SN Ia sample from the Dark Energy Survey. We show that Euclid will observe hundreds of SLSNe-I for free. These luminous transients will be in the Euclid data-stream and we should prepare now to identify them as they offer a new probe of the high-redshift Universe for both astrophysics and cosmology.
description: Paper accepted by A&A, abstract abridged. This paper is published on behalf of the Euclid Consortium