cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Backward pion-nucleon scattering
Creators: name: Huang, F.
name: Sibirtsev, A.
name: Haidenbauer, J.
name: Krewald, S.
name: Meissner, U. -G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A global analysis of the world data on differential cross sections and polarization asymmetries of backward pion-nucleon scattering for invariant collision energies above 3 GeV is performed in a Regge model. Including the $N_α$, $N_γ$, $Δ_δ$ and $Δ_β$ trajectories, we reproduce both angular distributions and polarization data for small values of the Mandelstam variable $u$, in contrast to previous analyses. The model amplitude is used to obtain evidence for baryon resonances with mass below 3 GeV. Our analysis suggests a $G_{39}$ resonance with a mass of 2.83 GeV as member of the $Δ_β$ trajectory from the corresponding Chew-Frautschi plot.
description: 12 pages, 16 figures
Hydrodynamic approach to many-body systems: exact conservation laws
Creators: name: N, Narozhny B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper I present a pedagogical derivation of continuity equations manifesting exact conservation laws in an interacting electronic system based on the nonequilibrium Keldysh technique. The purpose of this exercise is to lay the groundwork for extending the hydrodynamic approach to electronic transport to strongly correlated systems where the quasiparticle approximation and Boltzmann kinetic theory fail.
description: 23 pages
Implicit Model Specialization through DAG-based Decentralized Federated Learning
Creators: name: Beilharz, Jossekin
name: Pfitzner, Bjarne
name: Schmid, Robert
name: Geppert, Paul
name: Arnrich, Bert
name: Polze, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Federated learning allows a group of distributed clients to train a common machine learning model on private data. The exchange of model updates is managed either by a central entity or in a decentralized way, e.g. by a blockchain. However, the strong generalization across all clients makes these approaches unsuited for non-independent and identically distributed (non-IID) data. We propose a unified approach to decentralization and personalization in federated learning that is based on a directed acyclic graph (DAG) of model updates. Instead of training a single global model, clients specialize on their local data while using the model updates from other clients dependent on the similarity of their respective data. This specialization implicitly emerges from the DAG-based communication and selection of model updates. Thus, we enable the evolution of specialized models, which focus on a subset of the data and therefore cover non-IID data better than federated learning in a centralized or blockchain-based setup. To the best of our knowledge, the proposed solution is the first to unite personalization and poisoning robustness in fully decentralized federated learning. Our evaluation shows that the specialization of models emerges directly from the DAG-based communication of model updates on three different datasets. Furthermore, we show stable model accuracy and less variance across clients when compared to federated averaging.
description: to be published in Middleware '21
Concerns of adult open heart surgery patients during the three to four weeks following discharge from hospital
Creators: name: O’Loane, Brenda Maureen
Publisher: name: University of British Columbia
Year: 2010

description: This descriptive study was designed to explore the perceived concerns of open heart surgery patients following their discharge from hospital. The study was conducted by means of semi-structured interviews of twenty patients who were convalescing from open heart surgery, who met a set of specified criteria, and who gave written consent to participate in the study. All twenty patients had undergone open heart surgery in a large urban hospital over a period of four months. The patients were interviewed by the investigator during their third or fourth week at home in order to obtain a fairly accurate view of the concerns and difficulties faced by them early in their convalescence. Subsequently, the investigator was to identify the common concerns. A semi-structured, verbal interview schedule was employed to elicit spontaneous responses about the patients1 physiological, emotional and socio-economic concerns. Patients were also asked for some evaluation of the printed Discharge Guidelines they received prior to hospital discharge. The investigator transcribed the tape-recorded interviews and compiled the data noting specific common concerns of patients during said period of convalescence. Ninety-five percent of the patients expressed concerns of a physiological nature. The most common concerns in this area were pain, difficulty sleeping, and continued weakness and tiredness. Seventy-five percent of the study group experienced emotional concerns, the most common being frustration resulting from a low tolerance for physical activity, and feelings of depression. Thirty percent of the patients expressed socio-economic concerns of which only one concern, that of financial need, was common to two of the patients. All twenty patients received the Discharge Guidelines in the hospital. Nineteen of these instruction sheets were completed, one was not. Eighty-five percent of the patients received some explanation of these printed instructions. Thirty-five percent of the study group received some written elaboration of the instructions, including a schedule for increasing walking activity. The study concluded with recommendations for better preparation of open heart surgery patients for hospital discharge, and suggestions of areas for further investigation.
Valutazione dello spessore intima-media carotideo come fattore di rischio cardiovascolare nei pazienti affetti da psoriasi moderato-severa
Creators: name: Antonucci, Angela <1977>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: MED/35 Malattie cutanee e veneree

description: Evaluation of carotid artery intima-media thickness in patients affected by psoriasis
Psoriasis is associated with an increased risk of atherosclerosis. This study compared subclinical atherosclerosis, evaluating  intima-media thickness the of the carotid   in psoriasis vulgaris patients and healthy controls using high-resolution ultrasonography and the correlation of this parameter with other cardiovascular risk factors, like insulin resistance and dyslipidemia, 
 METHODS: We will study 40 psoriasis patients, asymptomatic for cardiovascular diseases, and 40 healthy controls matched for age and sex.  Intima-media thickness  of the common carotid arteries   will be measured ultrasonographically. Diabetes mellitus, hypertension, renal failure, a history of cardiovascular or cerebrovascular disease will be exclusion criteria. Subjects who are receiving lipid-lowering therapy, antihypertensive or anti-aggregant drugs, nitrates or long-term systemic steroids will be also excluded.
Objective of this study is the evaluation of  carotid artery intima-media thickness and its correlation with other blood cardiovascular risk factors in patients affected by psoriasis but asinptomatic for coronary   comparing this data  with the healthy control subjects. Considering that  the presence of psoriasis is an independent risk factor for subclinical atherosclerosis, we want to consider this method of evaluation of cardiovascular risk and to control this risk to prevent IMA.
Correcting the bias of empirical frequency parameter estimators in codon models
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Algorithms
Bias
Codon
Models, Statistical

description: Markov models of codon substitution are powerful inferential tools for studying biological processes such as natural selection and preferences in amino acid substitution. The equilibrium character distributions of these models are almost always estimated using nucleotide frequencies observed in a sequence alignment, primarily as a matter of historical convention. In this note, we demonstrate that a popular class of such estimators are biased, and that this bias has an adverse effect on goodness of fit and estimates of substitution rates. We propose a "corrected" empirical estimator that begins with observed nucleotide counts, but accounts for the nucleotide composition of stop codons. We show via simulation that the corrected estimates outperform the de facto standard F3 × 4 estimates not just by providing better estimates of the frequencies themselves, but also by leading to improved estimation of other parameters in the evolutionary models. On a curated collection of 856 sequence alignments, our estimators show a significant improvement in goodness of fit compared to the F3 × 4 approach. Maximum likelihood estimation of the frequency parameters appears to be warranted in many cases, albeit at a greater computational cost. Our results demonstrate that there is little justification, either statistical or computational, for continued use of the F3 × 4-style estimators. © 2010 Kosakovsky Pond et al.
Event and Activity Recognition in Video Surveillance for Cyber-Physical Systems
Creators: name: Bhaumik, Swarnabja
name: Jana, Prithwish
name: Mohanta, Partha Pratim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: I.2.9; I.2.10; I.4.7; I.4.8; I.5.1; I.5.2; I.5.4

description: This chapter aims to aid the development of Cyber-Physical Systems (CPS) in automated understanding of events and activities in various applications of video-surveillance. These events are mostly captured by drones, CCTVs or novice and unskilled individuals on low-end devices. Being unconstrained, these videos are immensely challenging due to a number of quality factors. We present an extensive account of the various approaches taken to solve the problem over the years. This ranges from methods as early as Structure from Motion (SFM) based approaches to recent solution frameworks involving deep neural networks. We show that the long-term motion patterns alone play a pivotal role in the task of recognizing an event. Consequently each video is significantly represented by a fixed number of key-frames using a graph-based approach. Only the temporal features are exploited using a hybrid Convolutional Neural Network (CNN) + Recurrent Neural Network (RNN) architecture. The results we obtain are encouraging as they outperform standard temporal CNNs and are at par with those using spatial information along with motion cues. Further exploring multistream models, we conceive a multi-tier fusion strategy for the spatial and temporal wings of a network. A consolidated representation of the respective individual prediction vectors on video and frame levels is obtained using a biased conflation technique. The fusion strategy endows us with greater rise in precision on each stage as compared to the state-of-the-art methods, and thus a powerful consensus is achieved in classification. Results are recorded on four benchmark datasets widely used in the domain of action recognition, namely CCV, HMDB, UCF-101 and KCV. It is inferable that focusing on better classification of the video sequences certainly leads to robust actuation of a system designed for event surveillance and object cum activity tracking.
description: This is a preprint of the chapter:S Bhaumik, P Jana, PP Mohanta, Event and Activity Recognition in Video Surveillance for Cyber-Physical Systems, published in Emergence of Cyber Physical System.., edited by KK Singh et al, 2021, Springer reproduced with permission of Springer Nature Switzerland AG. The final authenticated version is available online at http://dx.doi.org/10.1007/978-3-030-66222-6_4
Type II Einstein spacetimes in higher dimensions
Creators: name: Durkee, Mark
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This short note shows that many of the results derived by Pravda et al (Class. Quant. Grav. 24 4407-4428) for higher-dimensional Type D Einstein spacetimes can be generalized to all Einstein spacetimes admitting a multiple WAND; the main new result being the extension to include the Type II case. Examples of Type D Einstein spacetimes admitting non-geodesic multiple WANDs are given in all dimensions greater than 4.
description: 10 pages. v2: Various minor corrections and clarifications. Accepted by Class. Quantum Grav
Benchmarking multi-rate codon models
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Algorithms
Codon
Models, Genetic

description: The single rate codon model of non-synonymous substitution is ubiquitous in phylogenetic modeling. Indeed, the use of a non-synonymous to synonymous substitution rate ratio parameter has facilitated the interpretation of selection pressure on genomes. Although the single rate model has achieved wide acceptance, we argue that the assumption of a single rate of non-synonymous substitution is biologically unreasonable, given observed differences in substitution rates evident from empirical amino acid models. Some have attempted to incorporate amino acid substitution biases into models of codon evolution and have shown improved model performance versus the single rate model. Here, we show that the single rate model of non-synonymous substitution is easily outperformed by a model with multiple non-synonymous rate classes, yet in which amino acid substitution pairs are assigned randomly to these classes. We argue that, since the single rate model is so easy to improve upon, new codon models should not be validated entirely on the basis of improved model fit over this model. Rather, we should strive to both improve on the single rate model and to approximate the general time-reversible model of codon substitution, with as few parameters as possible, so as to reduce model over-fitting. We hint at how this can be achieved with a Genetic Algorithm approach in which rate classes are assigned on the basis of sequence information content. © 2010 Delport et al.
The potential of the 3-UPU translational parallel manipulator and a procedure to select the best architecture
Creators: name: Chebbi, Ahmed Hachem <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: ING-IND/13 Meccanica applicata alle macchine

description: The 3-UPU three degrees of freedom fully parallel manipulator, where U and P are for universal and prismatic pair respectively, is a very well known manipulator that can provide the platform with three degrees of freedom of pure translation, pure rotation or mixed translation and rotation with respect to the base, according to the relative directions of the revolute pair axes (each universal pair comprises two revolute pairs with intersecting and perpendicular axes).
	In particular, pure translational parallel 3-UPU manipulators (3-UPU TPMs) received great attention. Many studies have been reported in the literature on singularities, workspace, and joint clearance influence on the platform accuracy of this manipulator. However, much work has still to be done to reveal all the features this topology can offer to the designer when different architecture, i.e. different geometry are considered. 
	Therefore, this dissertation will focus on this type of the 3-UPU manipulators. The first part of the dissertation presents six new architectures of the 3-UPU TPMs which offer interesting features to the designer. In the second part, a procedure is presented which is based on some indexes, in order to allows the designer to select the best architecture of the 3-UPU TPMs for a given task. Four indexes are proposed as stiffness, clearance, singularity and size of the manipulator in order to apply the procedure.
Development of the Healthy Pathways Child-Report Scales
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Adolescent
Child
Child Development
Female
Health Status
Humans
Male
Mental Health
Psychometrics
Reproducibility of Results
Surveys and Questionnaires

description: Purpose The Child Health and Illness Profile (CHIP) has separate child (6-11 years) and adolescent (12-21 years) editions that measure youth's self-assessed health, illness, and well-being. The purpose of this study was to revise the CHIP by combining the two editions to create the Healthy Pathways Child-Report Scales. Methods We modified the original CHIP domains of Comfort, Risk Avoidance, Satisfaction, and Resilience to reflect advances in child health conceptualization. Classical test and item response theory psychometric analyses were conducted using data collected from 2,095 children (49% boys, 80% White, 17% African-American, 3% Hispanic, Age: M = 10.6, SD = 1.0) in grades 4-6 at 34 schools. Results After minor revisions, 16 of the 17 scales were found to measure unidimensional self-assessed health, illness, and well-being constructs comprehensively, but with a minimal number of items. Scales were unbiased by age, gender, survey modality, and geographic location. Construct validity was demonstrated by the instrument's capacity to differentiate among children with and without chronic illnesses and to detect expected age and gender differences. Conclusions The Healthy Pathways Child-Report Scales may be used to reliably and accurately assess unidimensional aspects of health, illness, and well-being in clinical and population-based research studies involving youth in transition from childhood to adolescence.
Società di capitali amministratrici di società di persone
Creators: name: Bolognesi, Claudio <1978>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: IUS/04 Diritto commerciale

description: The present work focuses on a specific aspect of the general issue concerning the possible consequences of the reform of business corporations (“società di capitali”) on the discipline of partnerships (“società di persone”). 
After the reform of business law enacted with legislative decree n. 6/2003, the majority of the literature, in the light of the provisions of art. 2361 co. 2 civil code and art. 111-duodecies of the regulatory provisions (“disposizioni di attuazione”) of the civil code itself, maintains the possibility for a business corporation to be executive of a partnership.
As a matter of fact, whenever all the members of a partnership are actually business corporations, it shall be possible that either one of the latter becomes the executive, either such role is played by a third party, i. e. a non-partner.
After displaying the possible advantages and disadvantages stemming from a business corporation managing a partnership, the analysis investigates the legal feasibility  of the case in point. 
First of all, the reasons supporting the theory under which a legal person cannot be manager of a  partnership are examined in depth; an overview of the principal EU Member States’ legal systems and of the discipline of the European Economic Interest Grouping and of European Corporate is then provider for. At the outset of such analysis, the author asserts the legal possibility for a legal person to act as manager of a corporation, including a partnership. 
Afterwards, the investigation covers the issue of the executive-member in the partnerships. Initially, an overview of the literature concerning the legal nature of the management is offered; then, the three different categories of partnership are analyzed, in order to understand whether such legal persons can be managed by a third party (i.e. a non-member). On the basis of the existing strict connection between executive powers and unlimited liability, the author concludes that only the members shall be manager of the partnerships. 
Another chapter of the thesis is centred, from the one hand, on the textual data that, after the reform of 2003, support the aforesaid conclusion; from the other hand, on the peculiar features of the corporate business that is executive of a partnership. In particular, the attention is focused on the necessity or on the mere opportunity of an article of association explicitly providing that a corporate business can be executive of the partnership; on the practical ways by which the former shall manage the latter (especially on the necessity of nominating a permanent representative of the legal person and on the possibility to designate the procurators to this end); on the disclosure obligations applicable to the case in point.
The influence of certain variables upon the development of postpartum blues
Creators: name: Paull, Dorothy Bowden
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to determine the influence of certain variables upon the development of Postpartum Blues. Questions asked were: Do factors related to maternal role conflict influence the development of Postpartum Blues? Do specific endocrine factors related to the menstrual cycle influence the development of Postpartum Blues? Does a reduction in the number of sleep cycles influence the development of Postpartum Blues? Two semi-structured interview schedules and a questionnaire were constructed following a review of the literature to derive information pertinent to the research problem. The Beck Depression Inventory was also administered. The study population consisted of twenty-nine women. The study population was restricted to women who delivered full-term, apparently healthy infants in one hospital in Vancouver. Certain other criteria of language, demography, health, and obstetrics were applied. Analysis of the data included descriptive analysis, frequency tables, and the use of the chi square test. The findings of the study showed that 70 percent of the women experienced Postpartum Blues. The factors related to maternal role conflict, either singly or in combination, did not significantly influence the development of Postpartum Blues. Nor did the endocrine factors related to the menstrual cycle influence the development of Postpartum Blues. However, it was found that a reduction in sleep cycles over a four-day perinatal period significantly influenced the development of Postpartum Blues. Of the women who experienced a sleep deficiency, 85 percent developed Postpartum Blues. The study suggests that more attention be paid to the sleep needs of postpartum women, both in hospital and at home in the community.
Holographic duals of evaporating black holes
Creators: name: Emparan, Roberto
name: Luna, Raimon
name: Suzuki, Ryotaku
name: Tomašević, Marija
name: Way, Benson
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe the dynamical evaporation of a black hole as the classical evolution in time of a black hole in an Anti-de Sitter braneworld. A bulk black hole whose horizon intersects the brane yields the classical bulk dual of a black hole coupled to quantum conformal fields. The evaporation of this black hole happens when the bulk horizon slides off the brane, making the horizon on the brane shrink. We use a large-D effective theory of the bulk Einstein equations to solve the time evolution of these systems. With this method, we study the dual evaporation of a variety of black holes interacting with colder radiation baths. We also obtain the dual of the collapse of holographic radiation to form a black hole on the brane. Finally, we discuss the evolution of the Page curve of the radiation in our evaporation setups, with entanglement islands appearing and then shrinking during the decreasing part of the curve.
description: 27 pages, 13 figures. v2: 31 pages, 16 figures. Improved discussions, refs added. v3: matches published version
The IXPE Instrument Calibration Equipment
Creators: name: Muleri, Fabio
name: Piazzolla, Raffaele
name: Di Marco, Alessandro
name: Fabiani, Sergio
name: La Monaca, Fabio
name: Lefevre, Carlo
name: Morbidini, Alfredo
name: Rankin, John
name: Soffitta, Paolo
name: Tobia, Antonino
name: Xie, Fei
name: Amici, Fabrizio
name: Attinà, Primo
name: Bachetti, Matteo
name: Brienza, Daniele
name: Centrone, Mauro
name: Costa, Enrico
name: Del Monte, Ettore
name: Di Cosimo, Sergio
name: Di Persio, Giuseppe
name: Evangelista, Yuri
name: Ferrazzoli, Riccardo
name: Loffredo, Pasqualino
name: Perri, Matteo
name: Pilia, Maura
name: Puccetti, Simonetta
name: Ratheesh, Ajay
name: Rubini, Alda
name: Santoli, Francesco
name: Scalise, Emanuele
name: Trois, Alessio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Imaging X-ray Polarimetry Explorer is a mission dedicated to the measurement of X-ray polarization from tens of astrophysical sources belonging to different classes. Expected to be launched at the end of 2021, the payload comprises three mirrors and three focal plane imaging polarimeters, the latter being designed and built in Italy. While calibration is always an essential phase in the development of high-energy space missions, for IXPE it has been particularly extensive both to calibrate the response to polarization, which is peculiar to IXPE, and to achieve a statistical uncertainty below the expected sensitivity. In this paper we present the calibration equipment that was designed and built at INAF-IAPS in Rome, Italy, for the calibration of the polarization-sensitive focal plane detectors on-board IXPE. Equipment includes calibration sources, both polarized and unpolarized, stages to align and move the beam, test detectors and their mechanical assembly. While all these equipments were designed to fit the specific needs of the IXPE Instrument calibration, their versatility could also be used in the future for other projects.
description: 17 pages, 25 figures
Sparse multitask regression for identifying common mechanism of response to therapeutic targets
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Breast Neoplasms
Female
Gene Expression
Gene Expression Profiling
Genes, cdc
Humans
Regression Analysis

description: Motivation: Molecular association of phenotypic responses is an important step in hypothesis generation and for initiating design of new experiments. Current practices for associating gene expression data with multidimensional phenotypic data are typically (i) performed one-to-one, i.e. each gene is examined independently with a phenotypic index and (ii) tested with one stress condition at a time, i.e. different perturbations are analyzed separately. As a result, the complex coordination among the genes responsible for a phenotypic profile is potentially lost. More importantly, univariate analysis can potentially hide new insights into common mechanism of response. Results: In this article, we propose a sparse, multitask regression model together with co-clustering analysis to explore the intrinsic grouping in associating the gene expression with phenotypic signatures. The global structure of association is captured by learning an intrinsic template that is shared among experimental conditions, with local perturbations introduced to integrate effects of therapeutic agents. We demonstrate the performance of our approach on both synthetic and experimental data. Synthetic data reveal that the multi-task regression has a superior reduction in the regression error when compared with traditional L1-and L2-regularized regression. On the other hand, experiments with cell cycle inhibitors over a panel of 14 breast cancer cell lines demonstrate the relevance of the computed molecular predictors with the cell cycle machinery, as well as the identification of hidden variables that are not captured by the baseline regression analysis. Accordingly, the system has identified CLCA2 as a hidden transcript and as a common mechanism of response for two therapeutic agents of CI-1040 and Iressa, which are currently in clinical use. Contact: b_parvin@lbl.gov. © The Author(s) 2010. Published by Oxford University Press.
Influence of image noise on crack detection performance of deep convolutional neural networks
Creators: name: Chianese, Riccardo
name: Nguyen, Andy
name: Gharehbaghi, Vahidreza
name: Aravinthan, Thiru
name: Noori, Mohammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Development of deep learning techniques to analyse image data is an expansive and emerging field. The benefits of tracking, identifying, measuring, and sorting features of interest from image data has endless applications for saving cost, time, and improving safety. Much research has been conducted on classifying cracks from image data using deep convolutional neural networks; however, minimal research has been conducted to study the efficacy of network performance when noisy images are used. This paper will address the problem and is dedicated to investigating the influence of image noise on network accuracy. The methods used incorporate a benchmark image data set, which is purposely deteriorated with two types of noise, followed by treatment with image enhancement pre-processing techniques. These images, including their native counterparts, are then used to train and validate two different networks to study the differences in accuracy and performance. Results from this research reveal that noisy images have a moderate to high impact on the network's capability to accurately classify images despite the application of image pre-processing. A new index has been developed for finding the most efficient method for classification in terms of computation timing and accuracy. Consequently, AlexNet was selected as the most efficient model based on the proposed index.
description: 8 pages, 16 figures, 4 tables
State Complexity Approximation
Creators: name: Gao, Yuan
name: Yu, Sheng
Publisher: name: arXiv
Year: 2009
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: In this paper, we introduce the new concept of state complexity approximation, which is a further development of state complexity estimation. We show that this new concept is useful in both of the following two cases: the exact state complexities are not known and the state complexities have been obtained but are in incomprehensible form.
Molecular Bond Engineering and Feature Learning for the Design of Hybrid Organic-Inorganic Perovskites Solar Cells with Strong Non-Covalent Halogen-Cation Interactions
Creators: name: Teunissen, Johannes
name: da Pieve, Fabiana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Hybrid organic-inorganic perovskites are exceedingly interesting candidates for new solar energy technologies, for both ground-based and space applications. However, their large-scale production is hampered by the lack of long-term stability, mostly associated to ion migration. The specific role of non-covalent bonds in contributing to the stability remains elusive, and in certain cases controversial. Here, we perform an investigation on a large perovskite chemical space via a combination of first-principles calculations for the bond strengths and the recently developed Sure Independent Screening and Sparsifying Operator (SISSO) algorithm. The latter is used to formulate mathematical descriptors that, by highlighting the importance of specific non-covalent molecular bonds, can guide the design of perovskites with suppressed ion migration. The results unveil the distinct nature of different non-covalent interactions, with remarkable differences compared to previous arguments and interpretations in the literature on the basis of smaller chemical spaces. In particular, we clarify the origin of the higher stability offered by FA compared to MA, which shows to be different from previous arguments in the literature, the reasons of the improved stability given by the halogen F, and explain the exceptional case of overall stronger bonds for Guanidiunium. The found descriptors reveal the criteria that, within the stability boundaries given by the Goldschmidt factor, give an all-in-one picture of non-covalent interactions which provide the more stable configurations, also including interactions other than H-bonds. Such descriptors are more informative than previously used quantities and can be used as universal input to better inform new machine learning studies.
description: 32 pages 6 figures
Cavity Quantum Electrodynamics with Hyperbolic van der Waals Materials
Creators: name: Ashida, Yuto
name: Imamoglu, Atac
name: Demler, Eugene
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ground-state properties and excitation energies of a quantum emitter can be modified in the ultrastrong coupling regime of cavity quantum electrodynamics (QED) where the light-matter interaction strength becomes comparable to the cavity resonance frequency. Recent studies have started to explore the possibility of controlling an electronic material by embedding it in a cavity that confines electromagnetic fields in deep subwavelength scales. Currently, there is a strong interest in realizing ultrastrong-coupling cavity QED in the terahertz (THz) part of the spectrum, since most of the elementary excitations of quantum materials are in this frequency range. We propose and discuss a promising platform to achieve this goal based on a two-dimensional electronic material encapsulated by a planar cavity consisting of ultrathin polar van der Waals crystals. As a concrete setup, we show that nanometer-thick hexagonal boron nitride layers should allow one to reach the ultrastrong coupling regime for single-electron cyclotron resonance in a bilayer graphene. The proposed cavity platform can be realized by a wide variety of thin dielectric materials with hyperbolic dispersions. Consequently, van der Waals heterostructures hold the promise of becoming a versatile playground for exploring the ultrastrong-coupling physics of cavity QED materials.
description: 6+5 pages, 3+3 figures
Influence of Microstructure and Defects on Mechanical Properties of AISI H13 Manufactured by Electron Beam Powder Bed Fusion
Creators: name: Kahlert, Moritz
name: Brenne, Florian
name: Vollmer, Malte
name: Niendorf, Thomas
Publisher: name: Universität Kassel
Year: 2021
Subjects: subject: defects
subject: electron beam melting (EBM)
subject: time-temperature-path
subject: tool steel
subject: mechanical properties
subject: 620
subject: 660
subject: Selektives Laserschmelzen
subject: Werkstofffehler
subject: Elektronenstrahlschmelzen
subject: Werkzeugstahl
subject: Mechanische Eigenschaft
subject: Mikrostruktur

description: Gefördert im Rahmen des Projekts DEAL
On the universal behavior of $T\bar T$-deformed CFTs: single and double-trace partition functions at large $c$
Creators: name: Apolo, Luis
name: Song, Wei
name: Yu, Boyang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study universal properties of the torus partition function of $T\bar T$-deformed CFTs under the assumption of modular invariance, for both the original version, referred to as the double-trace version in this paper, and the single-trace version defined as the symmetric product orbifold of double-trace $T\bar T$-deformed CFTs. In the double-trace case, we specify sparseness conditions for the light states for which the partition function at low temperatures is dominated by the vacuum when the central charge of the undeformed CFT is large. Using modular invariance, this implies a universal density of high energy states, in analogy with the behavior of holographic CFTs. For the single-trace $T\bar T$ deformation, we show that modular invariance implies that the torus partition function can be written in terms of the untwisted partition function and its modular images, the latter of which can be obtained from the action of a generalized Hecke operator. The partition function and the energy of twisted states match holographic calculations in previous literature, thus providing further evidence for the conjectured holographic correspondence. In addition, we show that the single-trace partition function is universal when the central charge of the undeformed CFT is large, without needing to assume a sparse density of light states. Instead, the density of light states is shown to always saturate the sparseness condition.
description: 26 pages; v2: added references, matches published version
The relativistic jet and its central engine of $Fermi$ blazars
Creators: name: Xiao, Hubing
name: OuYang, Zhihao
name: Zhang, Lixia
name: Fu, Liping
name: Zhang, Shaohua
name: Zeng, Xiangtao
name: Fan, Junhui
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Jet origination is one of the most important questions of AGN, yet it stays obscure. In this work, we made use of information of emission lines, spectral energy distributions (SEDs), \textit{Fermi}-LAT $γ$-ray emission, construct a blazar sample that contains 667 sources. We notice that jet power originations are different for BL Lacs and for FSRQs. The correlation between jet power $P_{\rm jet}$ and the normalized disk luminosity $L_{\rm Disk}/L_{\rm Edd}$ shows a slope of -1.77 for BL Lacs and a slope of 1.16 for FSRQs. The results seem to suggest that BL Lac jets are powered by extracting blackhole rotation energy, while FSRQ jets are mostly powered by accretion disks. Meanwhile, we find the accretion ratio $\dot{M} / \dot{M}_{\rm Edd}$ increase with the normalized $γ$-ray luminosity. Base on this, we propose a dividing line, ${\rm log} (L_{\rm BLR}/L_{\rm Edd}) = 0.25 \ {\rm log} (L_{\rm γ}/L_{\rm Edd}) - 2.23$, to separate FSRQs and BL Lacs in the diagram of $L_{\rm BLR}/L_{\rm Edd}$ against $L_{\rm γ}/L_{\rm Edd}$ through using the machine learning method, the method gives an accuracy of 84.5\%. In addition, we propose an empirical formula, $M_{\rm BH}/M_{\rm \odot} \simeq L_{\rm γ}^{0.65}/21.46$, to estimate blackhole mass based on a strong correlation between $γ$-ray luminosity and blackhole mass. Strong $γ$-ray emission is typical in blazars, and the emission is always boosted by a Doppler beaming effect. In this work, we generate a new method to estimate a lower-limit of Doppler factor $δ$ and give $δ_{\rm BL Lac} = 7.94$ and $δ_{\rm FSRQ} = 11.55$.
description: Accepted to ApJ
Equation of state at finite density in two-flavor QCD with improved Wilson quarks
Creators: name: Aoki, S.
name: Ejiri, S.
name: Hatsuda, T.
name: Ishii, N.
name: Kanaya, K.
name: Maezawa, Y.
name: Ukita, N.
name: Umeda, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the equation of state in two-flavor QCD at finite temperature and density. Simulations are made with the RG-improved gluon action and the clover-improved Wilson quark action. Along the lines of constant physics for $m_{\rm PS}/m_{\rm V} = 0.65$ and 0.80, we compute the derivatives of the quark determinant with respect to the quark chemical potential $μ_q$ up to the fourth order at $μ_q=0$. We adopt several improvement techniques in the evaluation. We study thermodynamic quantities and quark number susceptibilities at finite $μ_q$ using these derivatives. We find enhancement of the quark number susceptibility at finite $μ_q$, in accordance with previous observations using staggered-type quarks. This suggests the existence of a nearby critical point.
description: 7 pages, 16 figures, presented at the XXVI International Symposium on Lattice Field Theory (LATTICE 2008), July 14-19, 2008, Williamsburg, Virginia, USA
Validazione in torrenti appenninici monitorati
di un modello fisicamente basato per la stima del deflusso solido sospeso
Creators: name: Rigotti, Marco <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: AGR/08 Idraulica agraria e sistemazioni idraulico-forestali

description: Il modello afflussi-deflussi e di erosione Kineros2, fisicamente basato, distribuito e a scala di evento, è stato applicato a due bacini idrografici montani
della provincia di Bologna (Italia) al fine di testare e valutare il suo funzionamento in ambiente appenninico. Dopo la parametrizzazione dei due bacini,
Kineros2 è stato calibrato e validato utilizzando dati sperimentali di portata e di concentrazione dei solidi sospesi, collezionati alla chiusura dei bacini
grazie alla presenza di due stazioni di monitoraggio idrotorbidimetrico. La modellazione ha consentito di valutare la capacità del modello di riprodurre
correttamente le dinamiche idrologiche osservate, nonchè di trarre conclusioni sulle sue potenzialità e limitazioni.
description: The event scale runoff and erosion model Kineros2, distributed and physically based, was applied to two mountain catchments in the province of
Bologna (Italy) in order to test and evaluate it in an Apennine environment.
Following basins parameterization, Kineros2 was calibrated and validated
by means of experimental discharge and suspended solids concentration data, which had been previously collected at the catchments’ outlets by two
hydro-turbidimetric monitoring stations. The simulation activity allowed to
evaluate the ability of the model to correctly reproduce the observed hydrological dynamics and, in addition, to gain some knowledge of both its
potentialities and limitations.
Efficacy of n-3 polyunsaturated fatty acids and feasibility of optimizing preventive strategies in patients at high cardiovascular risk: rationale, design and baseline characteristics of the Rischio and Prevenzione study, a large randomised trial in general practice
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Aged
Cardiotonic Agents
Cardiovascular Diseases
Diabetes Mellitus
Family Practice
Fatty Acids, Omega-3
Feasibility Studies
Female
Follow-Up Studies
Humans
Italy
Male
Middle Aged
Risk Factors

description: BACKGROUND: The optimization of preventive strategies in patients at high risk of cardiovascular events and the evaluation of bottlenecks and limitations of transferring current guidelines to the real world of clinical practice are important limiting steps to cardiovascular prevention. Treatment with n-3 polyunsaturated fatty acids improves prognosis after myocardial infarction, but evidence of this benefit is lacking in patients at high cardiovascular risk, but without a history of myocardial infarction. METHODS/DESIGN: Patients were eligible if their general practitioner (GP) considered them at high cardiovascular risk because of a cardiovascular disease other than myocardial infarction, or multiple risk factors (at least four major risk factors in non-diabetic patients and one in diabetics).Patients were randomly allocated to treatment with n-3 polyunsaturated fatty acids (1 g daily) or placebo in a double-blind study and followed up for five years by their GPs to assess the efficacy of the treatment in preventing cardiovascular mortality (including sudden death) and hospitalization for cardiovascular reasons. The secondary, epidemiological, aim of the study is to assess whether it is feasible to adopt current guidelines in everyday clinical practice, with a view to optimizing all the available preventive strategies in people at high cardiovascular risk.A nation-wide network of 860 GPs admitted 12,513 patients to the study between February 2004 and March 2007. The mean age was 64 years and 62% were males. Diabetes mellitus plus one or more cardiovascular risk factors was the main inclusion criterion (47%). About 30% of patients were included because of a history of atherosclerotic cardiovascular disease, 21% for four or more risk factors, and less than 1% for other reasons. DISCUSSION: The Rischio and Prevenzione (R&P) project provides a feasible model to test the efficacy of n-3 polyunsaturated fatty acid therapy in patients at high cardiovascular risk with no history of myocardial infarction, and to assess how to implement recommended preventive strategies in general practice. TRIAL REGISTRATION: ClinicalTrials.gov NCT00317707.
Bright cavity polariton solitons
Creators: name: Egorov, O. A.
name: Skryabin, D. V.
name: Yulin, A. V.
name: Lederer, F.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The lower branch of the dispersion relation of exciton polaritons in semiconductor microcavities, operating in the strong-coupling regime, contains sections of both positive and negative curvature along one spatial direction. We show that this leads to the existence of stable one-dimensional bright microcavity solitons supported by the repulsive polariton nonlinearity. To achieve localization along the second transverse direction we propose to create a special soliton waveguide by changing the cavity detuning and hence the boundary of the soliton existence in such a way that the solitons are allowed only within the stripe of the desired width.
description: 4 pages
Algebraically special axisymmetric solutions of the higher-dimensional vacuum Einstein equation
Creators: name: Godazgar, Mahdi
name: Reall, Harvey S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A d-dimensional spacetime is "axisymmetric" if it possesses an SO(d-2) isometry group whose orbits are (d-3)-spheres. In this paper, algebraically special, axisymmetric solutions of the higher dimensional vacuum Einstein equation (with cosmological constant) are investigated. Necessary and sufficient conditions for static axisymmetric solutions to belong to different algebraic classes are presented. Then general (possibly time-dependent) axisymmetric solutions are discussed. All axisymmetric solutions of algebraic types II, D, III and N are obtained.
description: 28 pages
Slowly rotating Kerr metric derived from the Einstein equations in affine-null coordinates
Creators: name: Mädler, Thomas
name: Gallo, Emanuel
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using a quasi-spherical approximation of an affine-null metric adapted to an asymptotic Bondi inertial frame, we present high order approximations of the metric functions in terms of the specific angular momentum for a slowly rotating stationary and axi-symmetric vacuum spacetime. The metric is obtained by following the procedure of integrating the hierarchy of Einstein equations in a characteristic formulation utilizing master functions for the perturbations. It is further verified its equivalence with the Kerr metric in the slowly rotation approximation by carrying out an explicit transformation between the Boyer-Lindquist coordinates to the employed affine-null coordinates.