cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Τραπεζική Εγγυητική Επιστολή:
Creators: name: Παρίτση, Θεοφανή Απόστολου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Εγγυητική Επιστολή
Κατάπτωση
Καταχρηστικότητα
Bank letter of guarantee
Forfeiture
Abussiveness

description: Σκοπός της συγκεκριμένης διπλωματικής είναι η εισαγωγή και η κατανόηση της συμβάσεως της τραπεζικής εγγυητικής επιστολής. Αναπτύσσονται τα διάφορα είδη εγγυητικών επιστολών που εμφανίζονται στις εμπορικές συναλλαγές, ενώ στη συνέχεια αναφέρονται οι προϋποθέσεις έκδοσης της, τα συμφέρονται που αποκομίζονται από μία τέτοια τριμερή σχέση καθώς και οι υποχρεώσεις που πηγάζουν για καθένα από τα συμβαλλόμενα μέρη. Ακόμη αναφερόμαστε στη μεταβίβαση της σύμβασης εγγυητικής επιστολής καθώς και στις υποχρεώσεις δημοσιότητας που ανακύπτουν από μία ενδεχόμενη εκχώρηση απαίτησης από την εγγυητική επιστολή. Επίσης υπάρχει και μία εκτενής αναφορά στον τρόπο λήξης της εν λόγω συμβάσεως και ειδικότερα στην ομαλή και στην καταχρηστική κατάπτωση της εγγυητικής επιστολής, αλλά και ποιό από τα μέρη δικαιούται να προβάλει την αντίστοιχη ένσταση καταχρηστικότητας. Σημαντικό επίσης θέμα που αναπτύσσεται στην παρούσα διπλωματική είναι και το θέμα της αναγωγής της τράπεζας κατά του οφειλέτη σε περίπτωση επελεύσεως του εξασφαλιστικού κινδύνου και κατά αποτέλεσμα καταβολής του ποσού που ενσωματώνεται στην εγγυητική επιστολή. Ένα άλλο θέμα που θίχτηκε ήταν αυτό για τη διαμεσολάβηση ανταποκρίτριας τράπεζας σε συναλλαγές με στοιχεία αλλοδαπότητας και επιπλέον γίνεται αναφορά στους Ομοιόμορφους Κανόνες και Συνήθειες του Διεθνούς Εμπορικού Επιμελητηρίου, στη σύμβαση των Ηνωμένων Εθνών για τις αυτόνομες εγγυήσεις αλλά και σε ζητήματα ιδιωτικού διεθνούς δικαίου.
description: The aim of this dissertation is the introduction and understanding of the contract of the bank letter of guarantee. Several types of letters of guarantee in the commercial transactions are described. Then, the conditions of its making out, the interests obtained by such a tripartite relationship along with the obligations deriving from each of the stipulating parties are mentioned. Furthermore, I refer to the alienation long with the obligations of publication, which emerge from a presumable assignment of claim from the bank guarantee. In addition, there is an extended mention regarding the means of termination of the afore mentioned contract and more specifically, the smooth and abusive forfeiture of bank guarantee along with which of the parties is entitled to show the corresponding objection abusiveness. A matter of great significance, which is raised in this dissertation, is the topic of recourse of the bank against the debtor in case of the fulfillment of the securing danger and thus, the deposit of the amount which is incorporated in the bank guarantee. Another issue, which was analyzed, was the mediation of the corresponding bank to transactions with alienage data. Moreover, there is a reference to the Uniform Customs and Practice for Documentary Credits, the contract of the United Nations as far as the autonomous guarantees are concerned and issues of private international law.
TrollHunter [Evader]: Automated Detection [Evasion] of Twitter Trolls During the COVID-19 Pandemic
Creators: name: Jachim, Peter
name: Sharevski, Filipo
name: Treebridge, Paige
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: This paper presents TrollHunter, an automated reasoning mechanism we used to hunt for trolls on Twitter during the COVID-19 pandemic in 2020. Trolls, poised to disrupt the online discourse and spread disinformation, quickly seized the absence of a credible response to COVID-19 and created a COVID-19 infodemic by promulgating dubious content on Twitter. To counter the COVID-19 infodemic, the TrollHunter leverages a unique linguistic analysis of a multi-dimensional set of Twitter content features to detect whether or not a tweet was meant to troll. TrollHunter achieved 98.5% accuracy, 75.4% precision and 69.8% recall over a dataset of 1.3 million tweets. Without a final resolution of the pandemic in sight, it is unlikely that the trolls will go away, although they might be forced to evade automated hunting. To explore the plausibility of this strategy, we developed and tested an adversarial machine learning mechanism called TrollHunter-Evader. TrollHunter-Evader employs a Test Time Evasion (TTE) approach in a combination with a Markov chain-based mechanism to recycle originally trolling tweets. The recycled tweets were able to achieve a remarkable 40% decrease in the TrollHunter's ability to correctly identify trolling tweets. Because the COVID-19 infodemic could have a harmful impact on the COVID-19 pandemic, we provide an elaborate discussion about the implications of employing adversarial machine learning to evade Twitter troll hunts.
description: Accepted for publication at NSPW 2020
THE SYNTHESIS, CHARACTERIZATION, AND UPCONVERTING PROPERTIES OF ERBIUM DOPED; YTTERBIUM, ERBIUM CO-DOPED YTTRIUM OXYSULFIDE PHOSPHORS UNDER 808, 980, AND 1560 nm EXCITATION
Creators: name: Wilkins, James
Publisher: name: VCU Libraries
Year: 2011

description: VCU Theses and Dissertations
Metabolism of hepatocytes from a mammalian hibernator, Spermophilus lateralis
Creators: name: Staples, James Francis
Publisher: name: University of British Columbia
Year: 2009

description: In mammalian hibernators, metabolism varies dramatically between deep hibernation and arousal. This change is reflected in tissue glycolytic and oxidative capacities. This thesis investigated cellular and tissue metabolism in the different stages of hibernation in ground squirrels. Total liver ATP content was not different between deep hibernation, arousal, and summer euthermia. In vivo 31P-NMR spectroscopy showed no change in liver and skeletal muscle high energy phosphate content during arousal. This observation indicates that metabolism is well regulated, and ATP consumption must be reduced to a similar degree as ATP production in hibernation. I predicted a reduced metabolic rate (Vo2) in hepatocytes isolated from animals in deep hibernation relative to cells from euthermic squirrels. At 37°C, Vo2 was 20% - 25% higher in hepatocytes from hibernating, aroused and summer cold acclimated animals than in cells from summer euthermic controls. Na+/K+ ATPase, considered an important ATP consumer in mammalian tissues, accounted for only around 15% of cellular Vo2 at 37°C, and this proportion did not change with hibernation state. When measured at 7°C, no difference in hepatocyte Vo2 was found between hibernation states. A CO2 induced intracellular acidification of 0.1 - 0.2 pH units did not affect Vo2 at 37°C or 7°C. I hypothesized that the higher metabolic capacities of hepatocytes from hibernating and aroused animals may permit higher rates of biosynthetic functions, important during periodic arousals. At 37°C gluconeogenic rates from lactate/pyruvate were 63% higher in hepatocytes from hibernating squirrels than those from summer control animals. With glycerol, these rates in the hibernating, aroused and cold acclimated states were twice that of summer state. No differences in activities of key gluconeogenic enzymes or oxidative efficiencies between hibernation states were found. Endogenous rates of ketone body production were higher in hepatocytes from hibernating S. lateralis, but with 3mM palmitate as substrate, no differences were evident. From these studies I conclude that metabolism remains well regulated, balanced and flexible throughout the hibernation cycle. This unique metabolice organization may permit energetic savings by allowing for a reduced Vb2 in deep hibernation, and an elevated VO2 during arousal to support high biosynthetic rates, thereby minimizing arousal durations and their attendant thermogenic demands.
Typical relaxation of perturbed quantum many-body systems
Creators: name: Dabelow, Lennart
name: Reimann, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We substantially extend our relaxation theory for perturbed many-body quantum systems from [Phys. Rev. Lett. 124, 120602 (2020)] by establishing an analytical prediction for the time-dependent observable expectation values which depends on only two characteristic parameters of the perturbation operator: its overall strength and its range or band width. Compared to the previous theory, a significantly larger range of perturbation strengths is covered. The results are obtained within a typicality framework by solving the pertinent random matrix problem exactly for a certain class of banded perturbations and by demonstrating the (approximative) universality of these solutions, which allows us to adopt them to considerably more general classes of perturbations. We also verify the prediction by comparison with several numerical examples.
description: 23 pages, 9 figures; introduction based on a preliminary, unpublished version of arXiv:1903.11881 (v1)
The scale of gravity and the cosmological constant within a landscape
Creators: name: Graesser, Michael L.
name: Salem, Michael P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is possible that the scale of gravity, parameterized by the apparent Planck mass, may obtain different values within different universes in an encompassing multiverse. We investigate the range over which the Planck mass may scan while still satisfying anthropic constraints. The window for anthropically allowed values of the Planck mass may have important consequences for landscape predictions. For example, if the likelihood to observe some value of the Planck mass is weighted by the inflationary expansion factors of the universes that contain that value, then it appears extremely unlikely to observe the value of the Planck mass that is measured within our universe. This is another example of the runaway inflation problem discussed in recent literature. We also show that the window for the Planck mass significantly weakens the anthropic constraint upon the cosmological constant when both are allowed to vary over a landscape.
description: 25 pages, 3 figures; v2: corrected minor computational errors in Sect. IV; v3: references added, version accepted by PRD
title: Temporal development of coastal ecosystems in the Baltic Sea - an assessment of patterns and trends
Creators: name: Olsson, Jens
name: Bergström, Lena
name: Tomczak, Maciej T
name: Ojaver, Henn
name: Gårdmark, Anna
name: Pollumae, Arno
name: Müller-Karulis, Bärbel
name: Ustups, Didzis
name: Dienesen, Grete E
name: Peltonen, Heikki
name: Putnis, Ivars
name: Szymanek, Lena
name: Simm, Mart
name: Heikinheimo, Outi
name: Gasyukov, Pavel
name: Axe, Philip
Publisher: name: ASC 2013 - Theme session B
Year: 2024
Subjects: The sea and human culture and societies
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Coastal areas are amongst the most productive aquatic systems worldwide, but face strong and variable anthropogenic pressures. Few studies have addressed the temporal development of coastal ecosystems in an integrated context. The current study represents a coordinated assessment of ecosystem development of 13 coastal systems in the Baltic Sea. Data covers different geographical areas, ranging from the Kattegat and Skagerack in the southwest to the Bothnian Bay in the north, between two to five trophic levels per area, and include time series dating back to the early 1990s. Using multivariate analyses, we assess the temporal development of ecosystems in relation to variables related to climate, hydrology, nutrient loading and fishing pressure. Our results show a similar timing of change and development of ecosystem structure across areas in spite of differences in which abiotic variables that were associated with the development of each system. The findings highlight gaps in available monitoring data to support integrated status assessments of Baltic ecosystems as required in the Baltic Sea Action Plan and the Marine Strategy Framework Directive, as well as the potential for developing multi-sectorial management advice in coastal ecosystems in the Baltic.
Presentations of Wess-Zumino-Witten Fusion Rings
Creators: name: Bouwknegt, Peter
name: Ridout, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The fusion rings of Wess-Zumino-Witten models are re-examined. Attention is drawn to the difference between fusion rings over Z (which are often of greater importance in applications) and fusion algebras over C. Complete proofs are given characterising the fusion algebras (over C) of the SU(r+1) and Sp(2r) models in terms of the fusion potentials, and it is shown that the analagous potentials cannot describe the fusion algebras of the other models. This explains why no other representation-theoretic fusion potentials have been found. Instead, explicit generators are then constructed for general WZW fusion rings (over Z). The Jacobi-Trudy identity and its Sp(2r) analogue are used to derive the known fusion potentials. This formalism is then extended to the WZW models over the spin groups of odd rank, and explicit presentations of the corresponding fusion rings are given. The analogues of the Jacobi-Trudy identity for the spinor representations (for all ranks) are derived for this purpose, and may be of independent interest.
description: 32 pages, 3 figures, added references, minor additions to text. To be published in Rev. Math. Phys
Searching for flares and CME signatures in the spectra of seven cool stars
Creators: name: A. Avramova-Boncheva
name: Korhonen, H.
name: I. Stateva
name: Antonova, A.
Publisher: name: Zenodo
Year: 2021
Subjects: stars: magnetic activity; stars: coronal mass ejection; stars: cool stars

description:  Searching for and investigating coronal mass ejections (CMEs) from late-type stars is important for understanding stellar activity and its effects on the stellar evolution, space weather and exoplanet atmospheres. To this end, we performed spectroscopic observations of 4 stars of spectral type K, one M dwarf and two solar-like stars in several epochs with the NOT/ALFOSC at La Palma and the 2-m RCC telescope/ESPERO of The National astronomical observatory Rozhen. We obtained 350 spectra from three consecutive nights in 2012 from ALFOSC and 159 spectra from ESPERO during 2020 and 2021. The resulting dynamic spectra do not show evidence for flares and/or CMEs. In addition, we obtained radial velocities for the stars, which we compare with those from previous investigations.
description: Bulgarian National Science Fund under contract DN 18/13-12.12.2017
Searching beyond the usual papillomavirus suspects in squamous carcinomas of the vulva, penis and head and neck
Creators: name: Félez-Sánchez, Marta
name: Vergara, Marleny
name: de Sanjosé, Silvia
name: Castellsagué, Xavier
name: Alemany, Laia
name: Bravo, Ignacio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: Human Papillomaviruses (HPVs) are involved in the etiology of anogenital and head and neck cancers. The HPV DNA prevalence greatly differs by anatomical site. Indeed, the high rates of viral DNA prevalence in anal and cer-vical carcinomas contrast with the lower fraction of cancer cases attributable to HPVs in other anatomical sites, chiefly the vulva, the penis and head and neck. Here we analyzed 2635 Formalin Fixed Paraffin Embedded surgical samples that had previously tested negative for the presence of HPVs DNA using the SPF10/DEIA procedure, in order to identify the presence of other PVs not explicitly targeted by standard molecular epidemiologic approaches. All samples were reanalyzed using five broad-PV PCR primer sets (CP1/2, FAP6064/FAP64, SKF/SKR, MY9/MY11, MFI/MFII) targeting the main PV main clades. In head and neck carcinoma samples (n = 1141), we recovered DNA from two BetaHPVs, namely HPV20 and HPV21, and from three cutaneous AlphaPVs, namely HPV2, HPV57 and HPV61. In vulvar squamous cell carcinoma samples (n = 902), we found one of the samples containing DNA of one cutaneous HPV, namely HPV2, and 29 samples contained DNA from essentially mucosal HPVs. In penile squamous cell carcinoma samples (n = 592), we retrieved the DNA of HPV16 in 16 samples. Our results show first that the SPF10/DEIA is very sensitive, as we recovered only 2.1% (55/2635) false negative results; second, that although the DNA of cutaneous HPVs can be detected in cancer samples, their relative contribution remains anyway minor (0.23%; 6/2635) and may be neglected for screening and vaccination purposes; and third, their contribution to malignancy is not necessarily warranted and needs to be elucidated.
Knot concordance and Heegaard Floer homology invariants in branched covers
Creators: name: Grigsby, J. Elisenda
name: Ruberman, Daniel
name: Strle, Saso
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57R58; 57M12; 57M27

description: By studying the Heegaard Floer homology of the preimage of a knot K in S^3 inside its double branched cover, we develop simple obstructions to K having finite order in the classical smooth concordance group. As an application, we prove that all 2-bridge knots of crossing number at most 12 for which the smooth concordance order was previously unknown have infinite smooth concordance order.
description: Expanded references; 25 pages, 5 figures
Post processing of differential images for direct extrasolar planet detection from the ground
Creators: name: Sauvage, J. -F.
name: Mugnier, L.
name: Fusco, T.
name: Rousset, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The direct imaging from the ground of extrasolar planets has become today a major astronomical and biological focus. This kind of imaging requires simultaneously the use of a dedicated high performance Adaptive Optics [AO] system and a differential imaging camera in order to cancel out the flux coming from the star. In addition, the use of sophisticated post-processing techniques is mandatory to achieve the ultimate detection performance required. In the framework of the SPHERE project, we present here the development of a new technique, based on Maximum A Posteriori [MAP] approach, able to estimate parameters of a faint companion in the vicinity of a bright star, using the multi-wavelength images, the AO closed-loop data as well as some knowledge on non-common path and differential aberrations. Simulation results show a 10^-5 detectivity at 5sigma for angular separation around 15lambda/D with only two images.
description: 12 pages, 6 figures, This paper will be published in the proceedings of the conference Advances in Adaptive Optics (SPIE 6272), part of SPIE's Astronomical Telescopes & Instrumentation, 24-31 May 2006, Orlando, FL
All 1/2 BPS solutions of IIB supergravity with SO(4) x SO(4) isometry
Creators: name: Liu, James T.
name: Sabra, Wafic
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In hep-th/0409174, Lin, Lunin and Maldacena constructed a set of regular 1/2 BPS geometries in IIB theory. These remarkable `bubbling AdS' geometries have a natural interpretation as duals of chiral primary operators with weight Delta=J in N=4 super-Yang Mills theory. Although these geometries have been assumed to be complete, from a purely supergravity point of view, additional 1/2 BPS configurations may potentially exist with a preferred null isometry. We explore this possibility and prove that the only additional class of 1/2 BPS solutions with SO(4) x SO(4) isometry are the familiar IIB pp-waves.
description: 10 pages, LaTeX
Probabilistic Latent Factor Model for Collaborative Filtering with Bayesian Inference
Creators: name: Fang, Jiansheng
name: Zhang, Xiaoqing
name: Hu, Yan
name: Xu, Yanwu
name: Yang, Ming
name: Liu, Jiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Latent Factor Model (LFM) is one of the most successful methods for Collaborative filtering (CF) in the recommendation system, in which both users and items are projected into a joint latent factor space. Base on matrix factorization applied usually in pattern recognition, LFM models user-item interactions as inner products of factor vectors of user and item in that space and can be efficiently solved by least square methods with optimal estimation. However, such optimal estimation methods are prone to overfitting due to the extreme sparsity of user-item interactions. In this paper, we propose a Bayesian treatment for LFM, named Bayesian Latent Factor Model (BLFM). Based on observed user-item interactions, we build a probabilistic factor model in which the regularization is introduced via placing prior constraint on latent factors, and the likelihood function is established over observations and parameters. Then we draw samples of latent factors from the posterior distribution with Variational Inference (VI) to predict expected value. We further make an extension to BLFM, called BLFMBias, incorporating user-dependent and item-dependent biases into the model for enhancing performance. Extensive experiments on the movie rating dataset show the effectiveness of our proposed models by compared with several strong baselines.
description: 8 pages, 5 figures, ICPR2020 conference
title: Effects of temperature on zooplankton population dynamics in the Barents Sea vary on a range of temporal, spatial and developmental scales
Creators: name: Kvile, Kristina Øie
name: Stenseth, Nils Chr.
name: Stige, Leif Chr.
Publisher: name: ASC 2013 - Theme session B
Year: 2024
Subjects: The sea and human culture and societies
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Temperature is considered the major factor shaping marine zooplankton dynamics, including distribution, abundance and phenology. During the past decades, the Barents Sea experienced strong temperature fluctuations, but previous studies have failed to show a clear link between temperature variation and the dynamics of the abundant copepod species Calanus finmarchicus. We have analysed a Russian time-series covering Atlantic waters of the Norwegian Sea and the Barents Sea, spanning from 1959 to 1993. This dataset with high spatial resolution includes information on both total copepod biomass and abundances of different life stages of C. finmarchicus. We investigated associations between temperature and C. finmarchicus abundances across separate life-stages and on various spatio-temporal scales, and found differing patterns that would be masked with a coarser data resolution. The results indicate associations between temperature and abundance, distribution and phenology of C. finmarchicus. C. finmarchicus is a primary food source for many fish species in the Barents Sea. Temperature effects on the dynamics of this species are therefore likely to have both ecological and economic importance.
Link groups and the A-B slice problem
Creators: name: Krushkal, Vyacheslav
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The A-B slice problem is a reformulation of the topological 4-dimensional surgery conjecture in terms of decompositions of the 4-ball and link homotopy. We show that link groups, a recently developed invariant of 4-manifolds, provide an obstruction for the class of model decompositions, introduced by M. Freedman and X.-S. Lin. This unifies and extends the previously known partial obstructions in the A-B slice program. As a consequence, link groups satisfy Alexander duality when restricted to the class of model decompositions, but not for general submanifolds of the 4-ball.
description: 16 pages; final version
Terain stability assessment using logistic regression analysis for the Jamieson-Orchid-Elbow Creeks subdrainage, Seymour River Basin, British Columbia
Creators: name: Gulyás, Gyula
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this research project was to develop a procedure for terrain stability assessment by applying case-control sampling and multiple logistic regression analysis, widely used statistical techniques in biomedical research and in epidemiology. The idea of applying statistical methods used in epidemiology to terrain stability assessment was based on the observation that landslides, like some diseases, are rare phenomena. The implementation of a terrain stability assessment based on these statistical techniques was expected to help understand the causeeffect relationships between landsliding and various terrain attributes. In contrast to the currently used approaches, the study procedure provided a quantitative tool to assess the risk of landsliding and to define the most important terrain attributes that contribute to soil mass movements. A case-control study of 20x20 m grid cells with average slope greater than 10 degrees was conducted on the Jamieson-Orchid-Elbow Creeks subdrainage of the Seymour River Basin, British Columbia. All of the 101 landslide cases were compared with 264 control grid cells. Multi-way cross classification tables were constructed to study the relationship between landsliding and several terrain attributes. A possible interaction between slope angle and the drainage condition of the soil was detected. A logistic regression analysis was then performed within a Geographic Information System (GIS) environment to develop a landslide risk model for the Jamieson-Orchid-Elbow Creeks study area. A landslide risk matrix was then constructed based on the landslide risk model. It was found that sites located in the transient snow zone, with slope angle greater than 55 degrees, on bedrock outcrop surficial material type and on shallow soil have the greatest risk of experiencing rapid, shallow soil mass movements. It was also found that holding all the other variables constant, slope angle had the greatest effect on the magnitude of landslide risk. Based on the data, sites with very steep slopes (over 55 degrees) have, on the average, five times the chance of experiencing a landslide event relative to sites with gentle slopes (10-25 degrees). The landslide risk matrix was used to create landslide risk categories. The spatial distribution of landslide risk, categorized as very low, low, moderate, high and very high, is portrayed within 20-m square grid cells on the landslide risk map. The major advantage of using the landslide risk assessment of this study is that it provides the terrain mapper with quantitative information about the relative risk of landsliding. This information can be used as a tool in planning watershed management activities and in an overall risk assessment for a given geographic area.
title: Modeling climate change and variability effects in the Bay of Biscay ecosystem using ROMS-N2P2Z2D2 -OSMOSE model
Creators: name: Chifflet, Marina
name: Ferrer, Luis
name: Fraile, Igaratza
name: Chust, Guillem
Publisher: name: ASC 2013 - Theme session B
Year: 2024
Subjects: The sea and human culture and societies
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. An end-to-end model is developed for the Bay of Biscay in order to assess the impact of hydro-climatic variability and changes upon the structure of the marine ecosystem. The hydrodynamicbiogeochemical 3D model ROMS-N2P2Z2D2, forced by detailed atmospheric and hydrologic forcing, has been implemented in the Bay of Biscay. This low-trophic-level model has been coupled to the high-trophic-level 2D model OSMOSE, which takes into account 8 fish species in the Bay of Biscay: anchovy, sardine, mackerel, horse-mackerel, hake, blue whiting, Bluefin tuna and albacore tuna. The both models have been validated with a 12-years hindcast simulation 1998-2009. Thus, two climate scenarios have been performed using atmospheric IPSL-CM4 model outputs: “present day” 1980-2000 and future climate scenario 2080-2099. The climate change signal is characterized by a general increase of the SST and a modification of the both annual cycle of phyto- and zoo-plankton biomass. The phytoplankton biomass decreases on the French shelf and the central plain, while it increases along the slope and on the West part of the domain. The zooplankton biomass increases in the major part of the domain, except on the French shelf. The trophic role of plankton produces variable responses in fish communities: The total fish biomass increases, but the changes depend on the species.
Spectral flow invariants and twisted cyclic theory from the Haar state on SU_q(2)
Creators: name: Carey, A. L.
name: Rennie, A.
name: Tong, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: In [CPR2], we presented a K-theoretic approach to finding invariants of algebras with no non-trivial traces. This paper presents a new example that is more typical of the generic situation. This is the case of an algebra that admits only non-faithful traces, namely SU_q(2), and also KMS states. Our main results are index theorems (which calculate spectral flow), one using ordinary cyclic cohomology and the other using twisted cyclic cohomology, where the twisting comes from the generator of the modular group of the Haar state. In contrast to the Cuntz algebras studied in [CPR2], the computations are considerably more complex and interesting, because there are nontrivial `eta' contributions to this index.
description: 25 pages, 1 figure
title: Shifts in the beginning of spawning time of the Baltic sprat in the current period: reasons and possible consequences
Creators: name: Karasiova, Elena
Publisher: name: ASC 2013 - Theme session B
Year: 2024
Subjects: The sea and human culture and societies
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. The contemporary data on sprat egg and larval abundances in Gdansk Deep for February-March since 1993 were considered. In March 1992-1999 the early life-stage amount was several times lower than in 2004-2011. The correlations between early life-stage numbers and ambient parameters (near-bottom salinity, water temperature, oxygen content and 11psu-isohaline depth) were considered. The highest links was revealed between the early stage abundances and 11psu-isohaline depth position. The other parameters had less effect on the spawning commencement. The 11psu-isohaline rising was a consequence of warm and saline water inflows what caused also an improvement of hydrographic conditions in late winter-early spring 2004, 2006 and 2007. It resulted in a wider depth range and larger sprat spawning habitat in the upper part of halocline where the early reproduction of that species took place. The penetration of warm (T°>7° C) water inflows could lead to earlier maturation and spawning due to an inherent plasticity of sprat reproductive traits
Scheduling Algorithms for Procrastinators
Creators: name: Bender, Michael A.
name: Clifford, Raphael
name: Tsichlas, Kostas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: This paper presents scheduling algorithms for procrastinators, where the speed that a procrastinator executes a job increases as the due date approaches. We give optimal off-line scheduling policies for linearly increasing speed functions. We then explain the computational/numerical issues involved in implementing this policy. We next explore the online setting, showing that there exist adversaries that force any online scheduling policy to miss due dates. This impossibility result motivates the problem of minimizing the maximum interval stretch of any job; the interval stretch of a job is the job's flow time divided by the job's due date minus release time. We show that several common scheduling strategies, including the "hit-the-highest-nail" strategy beloved by procrastinators, have arbitrarily large maximum interval stretch. Then we give the "thrashing" scheduling policy and show that it is a Θ(1) approximation algorithm for the maximum interval stretch.
description: 12 pages, 3 figures
The Cosmic Evolution Survey (COSMOS): The morphological content and enviromental dependence of the galaxy color-magnitude relation at z~0.7
Creators: name: Cassata, P.
name: Guzzo, L.
name: Franceschini, A.
name: Scoville, N.
name: Capak, P.
name: Ellis, R. S.
name: Koekemoer, A.
name: McCracken, H. J.
name: Mobasher, B.
name: Renzini, A.
name: Ricciardelli, E.
name: Scodeggio, M.
name: Taniguchi, Y.
name: Thompson, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the enviromental dependence and the morphological composition of the galaxy color-magnitude diagram at z~0.7, using a pilot sub-sample of ~2000 galaxies from the COSMOS surve, with I_AB<24, photometric redshift within 0.61
description: 15 pages; to appear in the ApJ Supplement COSMOS Special Issue
Design Of Drug-Like Protein-Protein Interaction Stabilizers Guided By Chelation-Controlled Bioactive Conformation Stabilization
Creators: name: Bosica, Francesco
name: Andrei, Sebastian
name: Neves, João Filipe
name: Brandt, Peter
name: Gunnarsson, Anders
name: Landrieu, Isabelle
name: Ottmann, Christian
name: O'Mahony, Gavin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: The protein-protein interactions (PPIs) of 14-3-3 proteins are a model system for studying PPI stabilization. The complex natural product Fusicoccin A stabilizes many 14-3-3 PPIs but is not amenable for use in SAR studies, motivating the search for more drug-like chemical matter. However, drug-like 14-3-3 PPI stabilizers enabling such study have remained elusive. An X-ray crystal structure of a PPI in complex with an extremely low potency stabilizer uncovered an unexpected non-protein interacting, ligand-chelated Mg 2+ leading to the discovery of metal ion-dependent 14-3-3 PPI stabilization potency. This originates from a novel chelation-controlled bioactive conformation stabilization effect. Metal chelation has been associated with pan-assay interference compounds (PAINS) and frequent hitter behavior, but chelation can evidently also lead to true potency gains and find use as a medicinal chemistry strategy to guide compound optimization. To demonstrate this, we exploited the effect to design the first potent, selective and drug-like 14-3-3 PPI stabilizers.
A Possible Origin of the Mass-Metallicity Relation of Galaxies
Creators: name: Koeppen, J.
name: Weidner, C.
name: Kroupa, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations show that galaxies follow a mass-metallicity relation over a wide range of masses. One currently favoured explanation is that less massive galaxies are less able to retain the gas and stellar ejecta and thus may lose the freshly produced metals in the form of galactic outflows. Galaxies with a low current star formation rate have been found to contain star clusters up to a lower mass limit. Since stars are predominately born in clusters, and less massive clusters have been found to be less likely to contain very massive stars, this implies that in environments or at times of low star formation, the stellar initial mass function does not extend to as high masses as during high star formation epochs. It is found that the oxygen yield is reduced by a factor of thirty when the star formation rate is decreased by 3 to 4 orders of magnitude. With this concept, chemical evolution models for galaxies of a range of masses are computed and shown to provide an excellent fit to the mass-metallicity relation derived recently by Tremonti et al. (2004). Furthermore, the models match the relation between galaxy mass and effective yield. Thus, the scenario of a variable integrated stellar initial mass function, which is based on the concept of formation of stars in clusters, may offer an attractive alternative or partial explanation of the mass-metallicity relation in galaxies.
description: 14 pages, 19 figures; accepted for publication by MNRAS; added a reference for section 4.1
Responsive Matrix Cells: A Focus+Context Approach for Exploring and Editing Multivariate Graphs
Creators: name: Horak, Tom
name: Berger, Philip
name: Schumann, Heidrun
name: Dachselt, Raimund
name: Tominski, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Matrix visualizations are a useful tool to provide a general overview of a graph's structure. For multivariate graphs, a remaining challenge is to cope with the attributes that are associated with nodes and edges. Addressing this challenge, we propose responsive matrix cells as a focus+context approach for embedding additional interactive views into a matrix. Responsive matrix cells are local zoomable regions of interest that provide auxiliary data exploration and editing facilities for multivariate graphs. They behave responsively by adapting their visual contents to the cell location, the available display space, and the user task. Responsive matrix cells enable users to reveal details about the graph, compare node and edge attributes, and edit data values directly in a matrix without resorting to external views or tools. We report the general design considerations for responsive matrix cells covering the visual and interactive means necessary to support a seamless data exploration and editing. Responsive matrix cells have been implemented in a web-based prototype based on which we demonstrate the utility of our approach. We describe a walk-through for the use case of analyzing a graph of soccer players and report on insights from a preliminary user feedback session.
description: Tom Horak and Philip Berger are joint first authors
Critical Opalescence in Baryonic QCD Matter
Creators: name: Antoniou, N. G.
name: Diakonos, F. K.
name: Kapoyannis, A. S.
name: Kousouris, K. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that critical opalescence, a clear signature of second-order phase transition in conventional matter, manifests itself as critical intermittency in QCD matter produced in experiments with nuclei. This behaviour is revealed in transverse momentum spectra as a pattern of power laws in factorial moments, to all orders, associated with baryon production. This phenomenon together with a similar effect in the isoscalar sector of pions (sigma mode) provide us with a set of observables associated with the search for the QCD critical point in experiments with nuclei at high energies.
description: 7 pages, 1 figure
Operation of Faddeev-Kernel in Configuration Space
Creators: name: Ishikawa, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a practical method to solve Faddeev three-body equations at energies above three-body breakup threshold as integral equations in coordinate space. This is an extension of previously used method for bound states and scattering states below three-body breakup threshold energy. We show that breakup components in three-body reactions produce long-range effects on Faddeev integral kernels in coordinate space, and propose numerical procedures to treat these effects. Using these techniques, we solve Faddeev equations for neutron-deuteron scattering to compare with benchmark solutions.
description: 20 pages, 8 figures, to be published in Few-Body Systems
title: Non-stationary synchrony and asynchrony in the deep sea driven by climate variability and populations spatial structure
Creators: name: Hidalgo, Manuel
name: Rueda, Lucia
name: Molinero, Juan Carlos
name: Guijarro, Beatriz
name: Massutí, Enric
Publisher: name: ASC 2013 - Theme session B
Year: 2024
Subjects: The sea and human culture and societies
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Spatial synchrony in population size changes is often referred as a time-invariant process, although it shows non-stationary dynamics driven by compound effects of ecological and environmental mechanisms. Understanding these interactions is particularly relevant for species whose population dynamics is little known such as those inhabiting the deep sea. We here address this question by using monthly abundance data over the period 2000-2010 of a deep-sea harvested species in the Mediterranean Sea, the red shrimp Aristeus antennatus. We investigated two subpopulations in the Mediterranean that contrast in the complexity of the spatial structure. We show evidence on the non-stationary seasonal synchrony and asynchrony, which are shaped by a varying contribution of external (climate) and internal drivers (demography and life history) at each subpopulation. We also show that the subpopulation with larger spatial complexity displayed seasonal synchronic fluctuations dependent on the local dynamics. By contrast, in the subpopulation with a low level of complexity, climatic variability triggered a trade-off between synchronic and asynchronic behaviour. We argue that climate influences the regional environment and spatially drives the phenology of primary producers, thereby modifying the timing of food advection from upper layers to benthic communities. These cascading links ultimately shape the temporal synchrony of broad distributed deep-sea populations.
Additional file 1 of Typing expertise in a large student population
Creators: name: Pinet, Svetlana
name: Zielinski, Christelle
name: Alario, F.-Xavier
name: Longcamp, Marieke
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: Hematology

description: Additional file 1. Supplementary material and analyses.
Force autocorrelation function in linear response theory and the origin of friction
Creators: name: Petravic, Janka
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Vanishing of the equilibrium Green-Kubo fluctuation expression for the friction coefficient of a massive particle moving in a finite-volume liquid is usually interpreted as an unphysical consequence of the finite volume. Here I show that it is a physical consequence of the finite mass of the rest of the system, which allows it to be dragged by the moving particle. As a consequence, it is sufficient to have two infinite masses in the liquid for the friction coefficient to be finite. In addition, I give the physical interpretation of different friction coefficients for two infinite-mass particles moving in the liquid.
description: 24 pages text and figures
title: On the predictive potential of spatially-explicit IBMs: Can larvae fish IBMs be used to predict recruitment success, results from a multi-decadal simulation of Atlantic cod (Gadus morhua) in the North Sea
Creators: name: Daewel, Ute
name: Schrum, Corinna
Publisher: name: ASC 2013 - Theme session B
Year: 2024
Subjects: The sea and human culture and societies
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Recruitment of Atlantic cod (Gadus morhua) in the North Sea is determined by a chain of processes impacting survival of early life stages, which are difficult to derive from observations only. Here, we utilized a spatially-explicit Individual Based Model for North Sea Atlantic cod linked to a 3d ecosystem model (ECOSMO) to disentangle processes relevant for long-term changes in potential larval survival (PLS). The model was integrated over a 60-year time period (1949-2008) and the results were analysed using common statistical methods. The simulated long-term dynamics in annual PLS exhibited pronounced year-to-year variability and a significant decrease after 1989. Ten environmental parameters were analysed with respect to their relevance for PLS whereof only water temperature and the u-component of the velocity field showed the same significant shift after 1989. A subsequent correlation analysis with observed Atlantic cod recruitment in the North Sea revealed significant changes in correlation during the considered time period indicating general shifts in process interactions relevant for recruitment. Our analysis revealed that the model is able to produce a cod recruitment index with significant predictive capacity during specific time periods and hence.
Characteristics of shock tube generated compressible vortex rings at very high shock Mach numbers
Creators: name: Poudel, Sajag
name: Dora, Chandrala Lakshmana
name: De, Ashoke
name: Das, Debopam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Compressible vortex rings, usually formed at the open end of a shock tube, often show interesting phenomena during their formation, evolution, and propagation depending on the shock Mach number (Ms) and exit flow conditions. The Mach number of the translating compressible vortex rings (Mv) investigated so far in the literature is subsonic as, the shock tube pressure ratio (PR) considered is relatively low. In this numerical study we focus on low to high vortex ring Mach numbers (0.31 < Mv < 1.08) cases with a particular focus on very high Mv cases that are not been reported in experiments as, it is difficult to obtain in laboratory. Using hydrogen as a driver section gas inside the shock tube, a supersonic compressible vortex ring (Mv > 1) is obtained for first time. It is established that the SST k-ω based DES turbulent model replicates the experimental observation better than the previously published results at different stages of development of the vortex ring. DES, which is an inbuilt hybrid of LES and RANS approaches is evoked that can automatically switch to the sub-grid scale (SGS) model in the LES regions (i.e. with different scale vortical structures) and to a RANS model in the rest of the region (i.e. where the grid spacing is greater than the turbulent length scale). The DES model can predict characteristics of the shear layer vortices as well as counter-rotating vortex rings (CRVRs) as reported in the experimental measurements. Formation of multiple triple points and the corresponding slip-stream shear layers and thus multiple CRVRs behind the primary vortex ring at different radial locations, in addition to the usual CRVRs, appears to be a unique characteristic for high Mach number vortex rings. For high PR, H2, case during formation stage, a vortex layer of reverse circulation (that of primary vortex ring) is formed (contd...)
description: 39 pages and 16 figures including Appendix, submitting to a Journal