cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Energy-momentum tensor and effective Lagrangian of scalar QED with a nonminimal coupling in 2D de Sitter spacetime
Creators: name: Ahmadmahmoudi, Marzieh Akbari
name: Bavarsad, Ehsan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have studied the induced one-loop energy-momentum tensor of a massive complex scalar field within the framework of nonperturbative quantum electrodynamics (QED) with a uniform electric field background on the Poincaré patch of the two-dimensional de Sitter spacetime ($\mathrm{dS_{2}}$). We also consider a direct coupling the scalar field to the Ricci scalar curvature which is parameterized by an arbitrary dimensionless nonminimal coupling constant. We evaluate the trace anomaly of the induced energy-momentum tensor. We show that our results for the induced energy-momentum tensor in the zero electric field case, and the trace anomaly are in agreement with the existing literature. Furthermore, we construct the one-loop effective Lagrangian from the induced energy-momentum tensor.
description: 22 pages, 2 figures
Model-Based Counterfactual Synthesizer for Interpretation
Creators: name: Yang, Fan
name: Alva, Sahan Suresh
name: Chen, Jiahao
name: Hu, Xia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Counterfactuals, serving as one of the emerging type of model interpretations, have recently received attention from both researchers and practitioners. Counterfactual explanations formalize the exploration of ``what-if'' scenarios, and are an instance of example-based reasoning using a set of hypothetical data samples. Counterfactuals essentially show how the model decision alters with input perturbations. Existing methods for generating counterfactuals are mainly algorithm-based, which are time-inefficient and assume the same counterfactual universe for different queries. To address these limitations, we propose a Model-based Counterfactual Synthesizer (MCS) framework for interpreting machine learning models. We first analyze the model-based counterfactual process and construct a base synthesizer using a conditional generative adversarial net (CGAN). To better approximate the counterfactual universe for those rare queries, we novelly employ the umbrella sampling technique to conduct the MCS framework training. Besides, we also enhance the MCS framework by incorporating the causal dependence among attributes with model inductive bias, and validate its design correctness from the causality identification perspective. Experimental results on several datasets demonstrate the effectiveness as well as efficiency of our proposed MCS framework, and verify the advantages compared with other alternatives.
description: 11 pages in total; To appear in KDD'21;
Das Therapiemanagement des Ovarialkarzinoms im Zeitalter der zielgerichteten Therapiestrategien
Creators: name: Pietzner, Klaus
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2021
Subjects: subject: ovarian neoplasm
subject: gynecologic oncology
subject: targeted therapy strategies
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Ohne Übertreibung lässt sich sagen, dass das Therapiemanagement des Ovarialkarzinoms voll im Zeitalter der zielgerichteten Strategien angekommen ist. Die Zulassungen des letzten Jahrzehntes beinhalten kaum noch klassische Zytostatika mehr, sondern bestehen fast ausschließlich aus zielgerichteten Therapieansätzen. Diese Entwicklung ist als sehr positiv zu bewerten und ging mit einer deutlichen Verbesserung für die Patientinnen, sowohl im Sinne der Prognoseverbesserung, als auch bezüglich des Nebenwirkungsspektrums, einher. Auch die modernen Veränderungen der chirurgischen Therapie des Ovarialkarzinoms mit einem Rückschritt in der Radikalität bei erhaltener Effektivität unterstützen erfreulicherweise diese Entwicklung. Die Neoangiogenesehemmung und die PARP-Inhibition haben sich als Therapiekonzepte bereits fest im klinischen Alltag etabliert und sorgten für eine massive Steigerung der Effektivität systemischer Therapien. Als vielversprechende und völlig neuartige Behandlungsmethode zeichnet sich die Immunonkologie in Form der Checkpoint-Inhibition ab. Die revolutionären Ergebnisse dieser neuartigen Substanzklasse konnten sich bisher nicht ohne Weiteres auf die Entität des Ovarialkarzinoms übertragen lassen. Hier wird eine der großen Herausforderung des nächsten Jahrzehntes darin liegen, durch Selektion der stark immunogenen Patientinnen und Kombination mit geeigneten Zytostatika, die Ansprechraten und Effektivität in die entsprechenden Höhen zu steigern, die bereits bei anderen Tumorentitäten das Therapiemanagement völlig revolutionierten. In der Zukunft ergeben sich durch den völlig neuen Ansatz der Immunonkologie noch viele Perspektiven und Möglichkeiten zur Kombination und Findung von Synergien. Kombinationen mit anderen immunonkologischen Substanzen wie zum Beispiel Catumaxomab, aber auch PARP-Inhibitioren und Neoangiogenesehemmer scheinen vielversprechend und werden in aktuell laufenden Studien überprüft. Auch Chemotherapie-freie Kombinationen scheinen zum ersten Mal in der Geschichte des Ovarialkarzinoms vielversprechend. Zusammenfassend lässt sich sagen, dass die Entwicklung zielgerichteter Therapien bereits einen massiven Beitrag zur Verbesserung der Behandlungsqualität in der Gynäkologischen Onkologie erreicht hat und auf absehbare Zeit auch der entscheidende Motor für die zukünftige Entwicklung in diesem Fachgebiet bleiben wird.
A case study of the implementation of a constructivist professional development program
Creators: name: Campbell, Geoffrey James
Publisher: name: University of British Columbia
Year: 2010

description: This study begins with a perceived crisis of confidence in professional knowledge. The traditional, positivist, "theory into practice" approach to the development of a professional knowledge base has been found to be unable to satisfactorily explain expert action—especially in situations of complexity and ambiguity such as those routinely found in teaching. Much recent literature, however, has taken the approach that professional knowledge must be constucted by the practitioner In the context of the practice. In this view, theory is developed from practice by reflecting on one's action-related knowledge. Unfortunately, because they tend to be Intellectually isolated and routinely having to deal with many clients at once, teachers have few opportunities to use this approach. The problem addressed in this study is how to provide a professional development experience which fosters reflective activity and the personal construction of knowledge by teachers within the context of their classroom practice. The primary theoretical perspectives which underpin this study are those of "constructivism", in which learning is viewed as an active process of constructing concepts by connecting new information with prior knowledge, and "reflection as reconstruction of experience" in which reflective activity is seen as a way of reconstructing understandings within the context of practice. These perspectives, together with a brief review of related literature regarding reflection within the teaching profession, provide the theoretical framework of the study. The study consists of a case analysis of a professional development activity which was designed to promote the reflective activity of teachers. The activity gave two participant teachers an opportunity to observe and discuss videotaped recordings of each other's practice over a period of several months. The resultant discussions were audiotaped by the Investigator and transcribed for analysis. Informal examination of transcripts and analysis of metaphor were used to identify elements of teacher knowledge. Instances of reflective activity were identified using a "clue structure" or set of criteria. The study concludes that elements of teacher knowledge can be identified in a such a discussion of teaching practice, that instances of reflective activity were evident during the time period of the study, and that the professional development activity was perceived by the teachers as being of personal benefit.
Statistics of static avalanches in a random pinning landscape
Creators: name: Doussal, Pierre Le
name: Middleton, A. Alan
name: Wiese, Kay Joerg
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the minimum-energy configuration of a d-dimensional elastic interface in a random potential tied to a harmonic spring. As a function of the spring position, the center of mass of the interface changes in discrete jumps, also called shocks or "static avalanches''. We obtain analytically the distribution of avalanche sizes and its cumulants within an epsilon=4-d expansion from a tree and 1-loop resummation, using functional renormalization. This is compared with exact numerical minimizations of interface energies for random field disorder in d=2,3. Connections to the Burgers equation and to dynamic avalanches are discussed.
description: 4 pages, 5 figures
High-throughput discovery of novel cubic crystal materials using deep generative neural networks
Creators: name: Zhao, Yong
name: Al-Fahdi, Mohammed
name: Hu, Ming
name: Siriwardane, Edirisuriya MD
name: Song, Yuqi
name: Nasiri, Alireza
name: Hu, Jianjun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High-throughput screening has become one of the major strategies for the discovery of novel functional materials. However, its effectiveness is severely limited by the lack of quantity and diversity of known materials deposited in the current materials repositories such as ICSD and OQMD. Recent progress in machine learning and especially deep learning have enabled a generative strategy that learns implicit chemical rules for creating chemically valid hypothetical materials with new compositions and structures. However, current materials generative models have difficulty in generating structurally diverse, chemically valid, and stable materials. Here we propose CubicGAN, a generative adversarial network (GAN) based deep neural network model for large scale generation of novel cubic crystal structures. When trained on 375,749 ternary crystal materials from the OQMD database, we show that our model is able to not only rediscover most of the currently known cubic materials but also generate hypothetical materials of new structure prototypes. A total of 506 such new materials (all of them are either ternary or quarternary) have been verified by DFT based phonon dispersion stability check, several of which have been found to potentially have exceptional functional properties. Considering the importance of cubic materials in wide applications such as solar cells and lithium batteries, our GAN model provides a promising approach to significantly expand the current repository of materials, enabling the discovery of new functional materials via screening. The new crystal structures finally verified by DFT are freely accessible at our Carolina Materials Database http://www.carolinamatdb.org.
description: 14 pages, 4 figures
From a Data Archive to Data Science: Supporting Current Research
Creators: name: Dennis, Tim
Publisher: name: Zenodo
Year: 2019
Subjects: data science
libraries

description: “Reports of our death have been greatly exaggerated,” says the UCLA Social Science Data Archive. It’s true: the SSDA is not the same as it always was, and that is a success story. In this presentation, we will report on the process we have used to begin transforming the respected Archive from a single purpose entity into a developing data science center serving the whole campus. We will articulate the change in research funding and standards that have mandated a new set of services, and more importantly a new dynamic organization that can develop collaboratively in conjunction with research trends and methodologies. As a data science center, our focus becomes the services that support data creation, interpretation, and dissemination regardless of discipline or methodology. In this presentation, you’ll get to see inside our peer benchmarking task force and get a peek inside the internal wranglings of a research university grappling with burgeoning research needs. In sum, you’ll find out why we made this change, and why you’ll want to make sure data science is part of your portfolio too.
Artiodactyla Owen 1848
Creators: name: Jo, Yeong-Seok
name: Baccus, John T.
name: Koprowski, John L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Artiodactyla

description: ORDER ARTIODACTYLA Owen, 1848   Artiodactyla and Cetacea are often considered a single Order Cetartiodactyla (O’Leary & Gatesy 2008; O’Leary 2009). Spaulding et al. (2009) supported the name ‘Artiodactyla’, but they included Cetacea in the Order Artiodactyla. However, most morphologists and paleontologists support a partition between the two orders (Vaughan et al. 2013), as Wilson & Reeder (2005) that we followed here.
The Artiodactyla of Korea contains seven species distributed into in six genera and four families.
description: Published as part of Jo, Yeong-Seok, Baccus, John T. & Koprowski, John L., 2018, Mammals of Korea: a review of their taxonomy, distribution and conservation status, pp. 1-216 in Zootaxa 4522 (1) on page 101, DOI: 10.11646/zootaxa.4522.1.1, http://zenodo.org/record/2610198
Phenomenological theory of phase transitions in epitaxial BaTiO3 thin films
Creators: name: Shirokov, V. B.
name: Yuzyuk, Yu. I.
name: Dkhil, B.
name: Lemanov, V. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We develop a phenomenological thermodynamic theory of ferroelectric BaTiO3 (BT) thin films epitaxially grown on cubic substrates using the Landau-Devonshire eight-order potential. The constructed "misfit-temperature" phase diagram is asymmetrical. We found that, overall view of the phase diagram depends on the values of compliances used in calculations and provide two qualitatively different diagrams. A thermodynamic path for BT film grown onto particular substrate can be found using a plot of the room-temperature tetragonal distortion (c-a)/a as a function of misfit strain.
description: 6 pages, 3 figures
Investigation of Time-Frequency Feature Combinations with Histogram Layer Time Delay Neural Networks
Creators: name: Mohammadi, Amirmohammad
name: Masabarakiza, Iren'e
name: Barnes, Ethan
name: Carreiro, Davelle
name: Van Dine, Alexandra
name: Peeples, Joshua
Publisher: name: Zenodo
Year: 2024

description: While deep learning has reduced the prevalence of manual feature extraction, transformation of data via feature engineering remains essential for improving model performance, particularly for underwater acoustic signals. The methods by which audio signals are converted into time-frequency representations and the subsequent handling of these spectrograms can significantly impact performance. This work demonstrates the performance impact of using different combinations of time-frequency features in a histogram layer time delay neural network. An optimal set of features is identified with results indicating that specific feature combinations outperform single data features.
description: DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited. This material is based upon work supported by the Under Secretary of Defense for Research and Engineering under Air Force Contract No. FA8702-15-D-0001. Any opinions, findings, conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Under Secretary of Defense for Research and Engineering. 2024 Massachusetts Institute of Technology. Delivered to the U.S. Government with Unlimited Rights, as defined in DFARS Part 252.227-7013 or 7014 (Feb 2014). Notwithstanding any copyright notice, U.S. Government rights in this work are defined by DFARS 252.227-7013 or DFARS 252.227-7014 as detailed above. Use of this work other than as specifically authorized by the U.S. Government may violate any copyrights that exist in this work.
Universality of k-string Tensions from Holography and the Lattice
Creators: name: Armoni, Adi
name: Lucini, Biagio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider large Wilson loops with quarks in higher representations in SU(N) Yang-Mills theories. We consider representations with common N-ality and check whether the expectation value of the Wilson loop depends on the specific representation or only on the N-ality. In the framework of AdS/CFT we show that = dim R exp -sigma_k A, namely that the string tension depends only on the N-ality k but the pre-exponent factor is representation dependent. The lattice strong coupling expansion yields an identical result at infinite N, but shows a representation dependence of the string tension at finite N, a result which we interpret as an artifact. In order to confirm the representation independence of the string tension we re-analyse results of lattice simulations involving operators with common N-ality in pure SU(N) Yang-Mills theory. We find that the picture of the representation-independence of the string tension is confirmed by the spectrum of excited states in the stringy sector, while the lowest-lying states seem to depend on the representation. We argue that this unexpected result is due to the insufficient distance of the static sources for the asymptotic behaviour to be visible and give an estimate of the distance above which a truly representation-independent spectrum should be observed.
description: Refs. added, discussion in sect. 3 improved, other minor changes; to appear in JHEP
Heavy quarkonium in a holographic QCD model
Creators: name: Kim, Youngman
name: Lee, Jong-Phil
name: Lee, Su Houng
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Encouraged by recent developments in AdS/QCD models for light quark system, we study heavy quarkonium in the framework of the AdS/QCD models. We calculate the masses of $c\bar c$ vector meson states using the AdS/QCD models at zero and at finite temperature. Among the models adopted in this work, we find that the soft wall model describes the low-lying heavy quark meson states at zero temperature relatively well. At finite temperature, we observe that once the bound state is above $T_c$, its mass will increase with temperature until it dissociates at a temperature of around $494 {\rm MeV}$. It is shown that the dissociation temperature is fixed by the infrared cutoff of the models. The present model serves as a unified non perturbative model to investigate the properties of bound quarkonium states above $T_c$.
description: 9 pages, 1 figure, minor revision, to appear in phys. Rev. D
Chronic construct accessibility in socially phobic and agoraphobic outpatients
Creators: name: Capreol, Martha Jean
Publisher: name: University of British Columbia
Year: 2010

description: According to theories of social cognition, individuals screen incoming information from the environment using certain cognitive constructs (Wyer & Srull, 1986). Personally relevant construct systems develop from an individuals's particular history of social interactions (Wyer & Srull, 1986). A concern in social cognition theory is whether there are cognitive processes specific to different complaints (Beck & Emery, 1985). This study investigated whether the content of chronically accessible or salient constructs interpersonal constructs could differentiate individuals with social fears from those with different emotional complaints. The accessibility and salience of social constructs of social phobics, agoraphobics, and normal subjects were examined. No differences were found between the groups on an unstructured measure of construct accessibility. Group differences did emerge on a structured task reflecting salience of specific traits. Individuals with agoraphobia reported that they would be more attentive to the dimensions supportive-critical and enabling-bossy. This is consistent with current conceptualizations of agoraphobics as individuals who do not feel they can cope with the dangers of the outside world, and are compelled to seek help from a 'caregiver' (Beck & Emery, 1985). Social phobics reported that they would not be particularly attentive to any of the traits. This may be a result of socially phobic individuals self-focused attention.
L’esperienza artistica nella scuola italiana
Creators: name: Certini, Rossella
Publisher: name: Studi sulla Formazione
Year: 2015

description: The man’s history speaks an artistic language and the man’s evolution can be narrated by the artworks created by human’s imagination. The school should rethink about the role of art into educational path of the youth, considering it as a cross instrument for learning and activating a play that alternates to action of creating with the activity of understanding.
description: Studi sulla Formazione, Anno XVII, 2-2014
Anomalous Form Factor of the Neutral Pion in Extended AdS/QCD Model with Chern-Simons Term
Creators: name: Grigoryan, H. R.
name: Radyushkin, A. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose an extension of the hard-wall AdS/QCD model by including the Chern-Simons term required to reproduce the chiral anomaly of QCD. In the framework of this holographic model, we study the vertex function F_{πγ^* γ^*}(Q_1^2,Q_2^2) which accumulates information about the coupling of the pion to two (in general virtual) photons. We calculate the slope of the form factor with one real and one slightly virtual photon and show that it is close to experimental findings. We analyze the formal limit of large virtualities and establish that predictions of the holographic model analytically (including nontrivial dependence on the ratio of photon virtualities) coincide with those of perturbative QCD with asymptotic pion distribution amplitude. We also investigate the generalized VMD structure of F_{πγ^* γ^*}(Q_1^2,Q_2^2) in the extended AdS/QCD model.
description: 15 pages, 5 Figures, 4 Tables. Clarifications, 1 Table and references added, typos fixed
Secrecy Fairness Aware NOMA for Untrusted Users
Creators: name: Thapar, Sapna
name: Mishra, Deepak
name: Saini, Ravikant
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Spectrally-efficient secure non-orthogonal multiple access (NOMA) has recently attained a substantial research interest for fifth generation development. This work explores crucial security issue in NOMA which is stemmed from utilizing the decoding concept of successive interference cancellation. Considering untrusted users, we design a novel secure NOMA transmission protocol to maximize secrecy fairness among users. A new decoding order for two users' NOMA is proposed that provides positive secrecy rate to both users. Observing the objective of maximizing secrecy fairness between users under given power budget constraint, the problem is formulated as minimizing the maximum secrecy outage probability (SOP) between users. In particular, closed-form expressions of SOP for both users are derived to analyze secrecy performance. SOP minimization problems are solved using pseudoconvexity concept, and optimized power allocation (PA) for each user is obtained. Asymptotic expressions of SOPs, and optimal PAs minimizing these approximations are obtained to get deeper insights. Further, globally-optimized power control solution from secrecy fairness perspective is obtained at a low computational complexity and, asymptotic approximation is obtained to gain analytical insights. Numerical results validate the correctness of analysis, and present insights on optimal solutions. Finally, we present insights on global-optimal PA by which fairness is ensured and gains of about 55.12%, 69.30%, and 19.11%, respectively are achieved, compared to fixed PA and individual users' optimal PAs.
description: Conference paper, IEEE GLOBECOM2019, 6pages, 6 figures
Learning the “language of connections”. The value of art in the thinking of Gregory Bateson
Creators: name: Demozzi, Silvia
Publisher: name: Studi sulla Formazione
Year: 2015

description: The article presents a brief analysis of the role of art in the thinking of Gregory Bateson. This is the starting point for a pedagogical reflection that may emphasize, in the educational processes, the languages of connection, typical of art and metaphor, and may propose alternative paths to «single thought» and simplification.
description: Studi sulla Formazione, Anno XVII, 2-2014
Hyper-Kaehler geometry and dualization
Creators: name: Bellucci, S.
name: Krivonos, S.
name: Shcherbakov, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate that in N=8 supersymmetric mechanics with linear and nonlinear chiral supermultiplets one may dualize two auxiliary fields into physical ones in such a way that the bosonic manifold will be a hyper-Kaehler one. The key point of our construction is about different dualizations of the two auxiliary components. One of them is turned into a physical one in the standard way through its replacement by the total time derivative of some physical field. The other auxiliary field is dualized through a Lagrange multiplier. We clarify this choice of dualization by presenting the analogy with a three-dimensional case.
description: 9 pages, LaTeX file, PACS numbers: 11.30.Pb, 03.65.-w
On self-sustaining processes in Rayleigh-stable rotating plane Couette flows and subcritical transition to turbulence in accretion disks
Creators: name: Rincon, F.
name: Ogilvie, G. I.
name: Cossu, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Subcritical transition to turbulence in Keplerian accretion disks is still a controversial issue and some theoretical progress is required in order to determine whether or not this scenario provides a plausible explanation for the origin of angular momentum transport in non-magnetized accretion disks. Motivated by the recent discoveries of exact nonlinear steady self-sustaining solutions in linearly stable non-rotating shear flows, we attempt to compute similar solutions in Rayleigh-stable rotating plane Couette flows and to identify transition mechanisms in such flows by combining nonlinear continuation methods and asymptotic theory. We obtain exact nonlinear solutions for Rayleigh-stable cyclonic regimes but show that it is not possible to compute solutions for Rayleigh-stable anticyclonic regimes, including Keplerian flow, using similar techniques. We also present asymptotic descriptions of these various problems at large Reynolds numbers that provide some insight into the differences between the non-rotating and Rayleigh-stable anticyclonic regimes and derive some necessary conditions for mechanisms analogous to the non-rotating self-sustaining process to be present in flows on the Rayleigh line. Our results demonstrate that subcritical transition mechanisms cannot be identified in wall-bounded Rayleigh-stable anticyclonic shear flows by transposing directly the phenomenology of subcritical transition in cyclonic and non-rotating wall-bounded shear flows. Asymptotic developments, however, leave open the possibility that nonlinear self-sustaining solutions may exist in unbounded or periodic flows on the Rayleigh line. These could serve as a starting point to discover solutions in Rayleigh-stable flows, but the nonlinear stability of Keplerian accretion disks remains to be determined.
description: 16 pages, 12 figures. Accepted for publication in A&A
Environmental Influences on the Morphology and Dynamics of Group Size Haloes
Creators: name: Ragone-Figueroa, Cinthia
name: Plionis, Manolis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use group size haloes identified with a ``friends of friends'' (FOF) algorithm in a concordance $Λ\rm{CDM}$ GADGET2 (dark matter only) simulation to investigate the dependence of halo properties on the environment at $z=0$. The study is carried out using samples of haloes at different distances from their nearest massive {\em cluster} halo. We find that the fraction of haloes with substructure typically increases in high density regions. The halo mean axial ratio $$ also increases in overdense regions, a fact which is true for the whole range of halo mass studied. This can be explained as a reflection of an earlier halo formation time in high-density regions, which gives haloes more time to evolve and become more spherical. Moreover, this interpretation is supported by the fact that, at a given halo-cluster distance, haloes with substructure are more elongated than their equal mass counterparts with no substructure, reflecting that the virialization (and thus sphericalization) process is interrupted by merger events. The velocity dispersion of low mass haloes with strong substructure shows a significant increase near massive clusters with respect to equal mass haloes with low-levels of substructure or with haloes found in low-density environments. The alignment signal between the shape and the velocity ellipsoid principal axes decreases going from lower to higher density regions, while such an alignment is stronger for haloes without substructure. We also find, in agreement with other studies, a tendency of halo major axes to be aligned and of minor axes to lie roughly perpendicular with the orientation of the filament within which the halo is embedded, an effect which is stronger in the proximity of the massive clusters.
description: 11 pages, 12 figures, accepted for publication in MNRAS
Addendum to "Hyperbolic Space Cosmologies"
Creators: name: Chen, Chiang-Mei
name: Ho, Pei-Ming
name: Neupane, Ishwaree P.
name: Ohta, Nobuyoshi
name: Wang, John E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In our earlier paper [JHEP 0310 (2003) 058], we considered higher dimensional cosmological models with hyperbolic spaces. In particular the eternal accelerating expansion was obtained by studying small perturbation around the critical non-accelerated solution for $D > 10$. In this addendum, we show that there is also such a solution in the critical case $D = 10$.
description: 4 pages, v2: abstract added
Σχέση πυλαίας υπέρτασης-οισοφαγικών αλλοιώσεων με ή χωρίς τη χορήγηση προπρανολόλης: πειραματική μελέτη σε επιμύες
Creators: name: Αλατσάκης, Μιχαήλ Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Προπρανολόλη
Μορφομετρία
Propranolol
Morphometrical study

description: Η μελέτη μας έχει σκοπό να αναζητηθεί η προστατευτική δράση της πρώιμης χορήγησης προπανολόλης στην ανάπτυξη και το μέγεθος των αλλοιώσεων στον κατώτερο οισοφάγο επίμυων με πυλαία υπέρταση απότοκη ηπατικής κίρρωσης. Για τη διενέργεια της πειραματικής μελέτης επιλέχθηκε το πειραματικό μοντέλο, των Sakadamis και συν. Στο μοντέλο αυτό διενεργείται αρχικά απολίνωση της αριστερής επινεφριδικής και αποσκελετοποίηση της αριστερής νεφρικής φλέβας ενώ ακολουθεί πρόκληση ηπατικής κίρρωσης και πυλαίας υπέρτασης με χορήγηση τετραχλωράνθακα. Για τη διεξαγωγή του πειραματισμού χρησιμοποιήθηκαν δύο ομάδες των 30 επίμυων. Στους επίμυες της ομάδας Ι, άρχισε χορήγηση προπανολόλης την δεύτερη εβδομάδα μετά την έναρξη χορήγησης τετραχλωράνθακα και συνεχίστηκε για όλη τη διάρκεια του πειράματος. Στους επίμυες της ομάδας ΙΙ, χορηγήθηκε με τον ίδιο τρόπο φυσιολογικός ορός(placebo). Παράμετροι που μελετήθηκαν ήταν : ο συνολικός αριθμός των αγγείων του υποβλεννογόνιου χιτώνα, η συνολική επιφάνεια που καταλαμβάνουν τα αγγεία, η μέση επιφάνεια των αγγείων, το επί τοιις εκατό(%) ποσοστό του υποβλεννογόνιου που καταλαμβάνεται από τα αγγεία και η επιφάνεια του μεγαλύτερου από τα αγγεία του υποβλεννογόνιου. Από τη στατιατική ανάλυση δεν προέκυψαν στατιστικά σημαντικές διαφορές(ρ<0,05) μεταξύ της ομάδας Ι (χορήγηση προπρανολόλης) και της ομάδας ΙΙ (ομάδα ελέγχου) για καμία από τις παραπάνω μελετώμενες παραμέτρους. Από τα αποτελέσματα αυτά μπορούμε να συμπεράνουμε πως η πρώιμη χορήγηση προπανολόλης δεν προφύλαξε τους επίμυες από την ανάπτυξη οισοφαγικών κιρσών
description: Our study was designed in order to investigate the possible protective action of early propanolol administration in the development and degree of histologic changes in the lower esophagus of cirrhotic rats with portal hypertension. The experimental model developed by Sakadamis at al. was applied. In the model all animals were initially undergone ligation of the left adrenal vein and complete devascularisation of the left renal vein, while liver cirrhosis with portal hypertension was established next by intragastric administration of CCl4. For the experiment two groups of 30 rats each were used. In group I, intragastric propanolol administration started one week after the initial administration of CCl4 and continued daily until the end of the experiment. In group II, normal saline(placebo) was administered instead. The following paramenters were measured : total number of blood vessels in the submucosal surface occupied by these vessels, and the surface of the larger vessel among them. This statistical analysis revealed no statistically important difference(p<0.05) between the two groups for the morphometrically studied parameters. From these results we can conclude that early propranolol administration did not protect rats from developing esophageal varises
Protein-Polymer Mixtures in the Colloid Limit: Aggregation, Sedimentation and Crystallization
Creators: name: Cheng, Rui
name: Li, Jingwen
name: de Anda, Ioatzin Ríos
name: Taylor, Thomas W. C.
name: Faers, Malcolm A.
name: Anderson, J. L. Ross
name: Seddon, Annela M.
name: Royall, C. Patrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: While proteins have been treated as particles with a spherically symmetric interaction, of course in reality the situation is rather more complex. A simple step towards higher complexity is to treat the proteins as non--spherical particles and that is the approach we pursue here. We investigate the phase behavior of enhanced green fluorescent protein (eGFP) under the addition of a non--adsorbing polymer, polyethylene glycol (PEG). From small angle x-ray scattering we infer that the eGFP undergoes dimerization and we treat the dimers as spherocylinders with aspect ratio $L/D-1 = 1.05$. Despite the complex nature of the proteins, we find that the phase behaviour is similar to that of hard spherocylinders with ideal polymer depletant, exhibiting aggregation and, in a small region of the phase diagram, crystallization. By comparing our measurements of the onset of aggregation with predictions for hard colloids and ideal polymers [S.V. Savenko and M. Dijkstra, J. Chem. Phys 124, 234902 (2006) and F. lo Verso et al., Phys. Rev. E 73, 061407 (2006)] we find good agreement, which suggests that the eGFP proteins are consistent with hard spherocylinders and ideal polymer.
description: 12 pages
Η επίδραση της θεραπείας με μετφορμίνη στα επίπεδα των κυτταροκινών σε γυναίκες με σύνδρομο πολυκυστικών ωοθηκών
Creators: name: Τσιλχοροζίδου, Τασούλα Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Χημειοτακτική πρωτεϊνη-1 των μακροφάγων
Ιντερλευκίνη-6
Αδιπονεκτίνη
Chemoattractive protein-1(MCP-1)
Interleukin-6
Adiponectin

description: Ο σκοπός της μελέτης ήταν η εκτίμηση στη συστηματική κυκλοφορία των επιπέδων μιας σειράς φλεγμονωδών δειτκών και κυτταροκινών σε γυναίκες με σύνδρομο πολυκυστικών υοθηκών(ΣΠΩ)(n=59, μέσος όρος ΒΜΙ : 26,9 +_5,9 kg/m2) και η αξιολόγηση της δράσης της μετφορμίνης(μετά από έξι εβδομάδες και εξι μήνες θεραπείας) σε 37 από αυτές. Την ομ΄δα έλεγχος αποτέλεσαν 36 υγιείς γυναίκες της ίδιας ηλικίας και ΒΜΙ. Αποτελέσματα : τόσο οι αδύνατες, όσο και οι παχύσαρκες γυναίκες με ΣΠΩ εμφάνιζαν χαμηλότερα επίπεδα αδιπονεκτίνης σε σύγκριση με την αντίστοιχη ομάδα ελέγχου. Οι παχύσαρκες γυναίκες με ΣΠΩ εμφάνιζαν επιπλέον και υψηλότερα επίπεδα Κ-6 σε σύγκριση με την αντίστοιχη ομάδα ελέγχου. Η θεραπεία με μετφορμίνη για 6 εβδομάδες οδήγησε σε σημαντική μείωση των ΒΜΙ, περιμέτρου μέσης, hs-CRP, MCP-1 και λεπτίνης. Η θεραπεία με μετφορμίνη για 6 μήνες οδήγησε σε σημαντική μείωση των ΒΜΙ, περιμέτρου μέσης, HOMA-R, STNERII και λεπτίνης. Συμπεράσματα : η μετφορμίνη παρουσιάζει αντιφλεγμονώδεις δράσεις που πιθανά εξηγούν τις καρδιοπροστατευτικές της ιδιότητες
description: Aims : we determined cilculating levels of inflemmatory markers(hs-CRP and MCP-1) and cytokines(IL-6, STNFRI, STNFRII, leptin and adiponectin) in 59 women(mean BMI : 26,9+_5,9 kg/m2) with PCOS of whom 37 were retested after receiving metformin for 6 weeks and 6 months. Thirty six healthy women compise the control group. Results : both leen and obese PCOS women had lower adiponectin levels compared to healthy controls. Obese PCOS women also had higher IL-6 levels compared to obese controls. Six weeks of Metformin therapy produced a significant reduction in BMI, waist, hs-CRP, MCP-1 and leptin levels. Six months of Metformin therapy compared to baseline produced reduction in BMI, waist, IL-6, STNFRII and leptin levels. Conclusions : Metformin exerts anti-inflemmatory properties, which may explain, at least in part, its cardioprotective effects
Transcription of "Rock Story"
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio files VP-160715-03 and VP-160715-04: transcription of "Rock Story" from file VP-200506-01, from start to 3:21 (VP-160715-03) and 3:21 to 4:43 (VP-160715-04).
Ανάπτυξη συστήματος λήψεως αποφάσεων για την προστασία των δασών και του φυσικού περιβάλλοντος από ανθρωπογενείς κινδύνους
Creators: name: Ιωάννου, Κωνσταντίνος Στ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Δασικές πυρκαγιές
Αποκατάσταση Φυσικού Περιβάλλοντος
Αναλυτική Ιεραρχική Μεθοδολογία
Forest fires
Natural Environment Restoration
Analytical Hierarchy Process

description: Σκοπός της εργασίας αυτής είναι η ανάπτυξη ενός Συστήματος Λήψεως Αποφάσεων(ΣΛΑ) το οποίο θα υποβοηθεί τους διαχειριστές στην προστασία των δασών και του φυσικού περιβάλλοντος από ανθρωπογενείς κινδύνους. Συγκεκριμένα η παρούσα εφαρμογή αναπτύχθηκε για την μελέτη μιας περιοχής η οποία έχει υποστεί καταστροφικές συνέπειες μιας πυρκαγιάς. Για την ανάπτυξη της εφαρμογής έγινε χρήση της Visual C#, βάσεων δεδομένων Microsoft Access, λογιστικών φύλων Microsoft Excel, και του SDK ESRI MapObjects για την υποστήριξη του χαρτογραφικού υποβάθρου. Τέλος για την εξαγωγή των συντελεστών βαρύτητας της εφαρμογής έγινε χρήση μιας μεθοδολογίας της πολυκριτιριακής ανάλυσης η οποία λαμβάνει αποφάσεις για την αποκατάσταση μιας περιοχής μετά την εμφάνιση της πυρκαγιάς
description: The reason for this paper was the development of a Decision Support System (DSS) which will help managers in the protection of forests and natural environment from human made disasters in detail the presented application was developed for the study of an area after the occurence of a forest fire. The application was developed with a modular structure which provides it with the versatility needed in order to be easily upgraded innthe future. The DSS was developed using Visual C#, Microsoft Access, Microsoft Excel and ESRI Mapobjects for cartographic support, finally for the extraction of weights of the parameters a methodology of Multicriteria Analysis was used calle AHP
Bright solitons in asymmetrically trapped Bose-Einstein condensate
Creators: name: Ali, Sk. Golam
name: Talukdar, B.
name: Roy, S. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study the dynamics of bright solitons in a Bose-Einstein condensate (BEC) confined in a highly asymmetric trap. While working within the f ramework of a variational approach we carry out the stability analysis o f BEC solitons against collapse. When the number of atoms in the soliton exceeds a critical number $N_c$, it undergoes the so called primary col lapse. We find an analytical expression for $N_c$ in terms of appropriat e experimental quantities that are used to produce and confine the conde nsate. We further demonstrate that, in the geometry of the problem consi dered, the width of the soliton varies inversely as the number of consti tuent atoms.
description: 5 pages, 1 figures
Asymptotic Capacity and Optimal Precoding Strategy of Multi-Level Precode & Forward in Correlated Channels
Creators: name: Fawaz, Nadia
name: Zarifi, Keyvan
name: Debbah, Merouane
name: Gesbert, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We analyze a multi-level MIMO relaying system where a multiple-antenna transmitter sends data to a multipleantenna receiver through several relay levels, also equipped with multiple antennas. Assuming correlated fading in each hop, each relay receives a faded version of the signal transmitted by the previous level, performs precoding on the received signal and retransmits it to the next level. Using free probability theory and assuming that the noise power at the relay levels - but not at the receiver - is negligible, a closed-form expression of the end-to-end asymptotic instantaneous mutual information is derived as the number of antennas in all levels grow large with the same rate. This asymptotic expression is shown to be independent from the channel realizations, to only depend on the channel statistics and to also serve as the asymptotic value of the end-to-end average mutual information. We also provide the optimal singular vectors of the precoding matrices that maximize the asymptotic mutual information : the optimal transmit directions represented by the singular vectors of the precoding matrices are aligned on the eigenvectors of the channel correlation matrices, therefore they can be determined only using the known statistics of the channel matrices and do not depend on a particular channel realization.
description: 5 pages, 3 figures, to be published in proceedings of IEEE Information Theory Workshop 2008
Education, subjectiviy, literature
Creators: name: Madrussan, Elena
Publisher: name: Studi sulla Formazione
Year: 2015

description: What kind of relationship exists between education, subject and literature? In the past this relationship was considered either a learning object or a process of identification with the main character of a novel. After Ricoeur the same re- lationship can be instead be approached from a different methodological point of view, which creates many new networks of meanings. In this context every literary experience becomes an educational experience and the subject is the restless connection between them.
description: Studi sulla Formazione, Anno XVII, 2-2014
Laboratory Testing of a Lyot Coronagraph Equipped with an Eighth-Order Notch Filter Image Mask
Creators: name: Crepp, Justin R.
name: Ge, Jian
name: Heuvel, Andrew D. Vanden
name: Miller, Shane P.
name: Kuchner, Marc J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have built a series of notch filter image masks that make the Lyot coronagraph less susceptible to low-spatial-frequency optical aberrations. In this paper, we present experimental results of their performance in the lab using monochromatic light. Our tests show that these ``eighth-order'' masks are resistant to tilt and focus alignment errors, and can generate contrast levels of 2 x 10^-6 at 3 lambda/D and 6 x 10^-7 at 10 lambda/D without the use of corrective optics such as deformable mirrors. This work supports recent theoretical studies suggesting that eighth-order masks can provide the Terrestrial Planet Finder Coronagraph with a large search area, high off-axis throughput, and a practical requisite pointing accuracy.
description: Accepted to ApJ. 16 pages, 7 figures, Contact jcrepp@astro.ufl.edu for high resolution images
Ripensare l’estetica nel tempo “mostruoso”
Creators: name: Mottana, Paolo
Publisher: name: Studi sulla Formazione
Year: 2015

description: The text reads again the notion of esthetic above all as symbolic sensibility, sensibility to the secret language of world, to her intimate correspondences, to the network of affinity in which it’s interweaved. Today this sensibility appears secondary and anesthetized, with effects of decline that reflect in many aspects of our life. It’s necessary to reactivate as soon as possible this sensibility and the resulting responsibility through the exercise of an accurate and receptive look, that is central in pedagogy of imagination and in general in artistic practicality. Only by virtue of an improved familiarity with the creative practicality of art in all its educational forms will be possible to give back slowly to man the necessary sensibility to listen the mute message of world and to learn again to inhabit it without violate it.
description: Studi sulla Formazione, Anno XVII, 2-2014
Cetacea Brisson 1762
Creators: name: Jo, Yeong-Seok
name: Baccus, John T.
name: Koprowski, John L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Cetacea

description: ORDER CETACEA Brisson, 1762  Eight families, 26 genera and 37 species of cetaceans that occur in Korea are classified in two Suborders, Mysticeti and Odontoceti, occur in Korea.
We followed the List of Marine Mammal Species and Subspecies (Committee on Taxonomy 2014) for the common and scientific names of Korean cetaceans.
Except for species listed in Appendix I (see below), all species of the order Cetacea are in CITES Appendix II.
description: Published as part of Jo, Yeong-Seok, Baccus, John T. & Koprowski, John L., 2018, Mammals of Korea: a review of their taxonomy, distribution and conservation status, pp. 1-216 in Zootaxa 4522 (1) on page 113, DOI: 10.11646/zootaxa.4522.1.1, http://zenodo.org/record/2610198
Children and art in the “Beauty Children, Mirò and Contemporary Art” experience
Creators: name: Silva, Clara
Publisher: name: Studi sulla Formazione
Year: 2015

description: Pedagogy has shown as children’s first drawings, pictures and graphic expressions are not simply scribbles: on the contrary, they are real, meaningful outlines of a story. In order to enhance the meaning of children’s drawings, the ‘workshop’ pedagogic-didactic model seems to be the most suited for a similar approach to aesthetic education. In light of these theoretical and methodological premises, this essay illustrates the project experiences carried out in numerous crèches and nursery schools both in Tuscany and some European countries, using Contemporary Art to enhance children’s creativity. The project activities involved the children’s whole sensorial sphere, together with their emotional experiences, arousing curiosity and promoting children’s individuality and harmonic development as well.
description: Studi sulla Formazione, Anno XVII, 2-2014