cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Formal operational reasoning in the intellectually gifted
Creators: name: Shaw, Brian
Publisher: name: University of British Columbia
Year: 2010

description: This study addresses the problem of assessing the logical reasoning potential of intellectually gifted students as indicated by their ability to use the eight formal operational concepts defined by Inhelder and Piaget. The performance of 39 tenth-grade and 26 twelfth-grade students previously identified as intellectually gifted was compared with that of 427 students representative of a cross-section of the school population at the same grade levels on a group-administered pencil-and-paper test of formal reasoning. The unequal and disproportionate group numbers necessitated the use of a generalized least-squares regression model of analysis of variance. The gifted groups performed significantly better than the norm group at each grade level, the difference being greater for the higher grade students. Differences related to grade level, sex, and group were found when the total scores, representing both concrete and formal operational reasoning, were used as the dependent variable. However, the effects of grade level and sex failed to show significance when competence in the use of the formal operational concepts was more strictly defined by higher-order responses. The subtests presented various degrees of difficulty, falling into three clearly defined levels which were similar for both gifted and norm group students. Vocational information obtained from a sub-sample of the gifted twelfth-grade students revealed no real difference between the scores of arts-oriented and science-oriented students. Low to moderate correlations between scores on the test of formal reasoning and I.Q. were found for the gifted group, the highest (0.53) being with verbal I.Q. at grade twelve. The findings suggest that use of the test of formal reasoning provides information that is supplementary to that obtained from conventional intelligence tests, and which may prove useful In helping to identify and provide appropriate programs for intellectually gifted students.
Rheological study of interactions between MHEC and superplasticizers in aqueous solutions for applications in cement industry
Creators: name: Nicodemi, Fabio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: Innovative cement-based materials are characterized today by rather complex formulations. In particular, when cement pastes are considered, their formulation generally includes two different types of polymers: a rheology modifier (RM) (typically a cellulose derivative), which is used to control the viscosity of the system, and a superplasticizer (SP), which is used as an anti-flocculant for the solid phase suspension. Owing to the polar nature of both polymer and solvent (water), chemico-physical interactions between the two polymers are expected. In this work, the rheology of aqueous solutions containing RMs and different types of SPs is studied. Solutions of the two components are prepared by respecting their relative proportions in the final cement formulations. Their behavior is studied by using rotational rheometry and performing viscosity and viscoelasticity measurements.
title: Towards platial information science - A theoretical and empirical approach to place
title: Προς την Επιστήμη του Τόπου - Μια θεωρητική και εμπειρική προσέγγιση της έννοιας του Τόπου
titleType: AlternativeTitle
Creators: name: Stavrianopoulou, Chara
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: subject: Place
subject: Platial Information Science
subject: Place-based research
subject: Space and Place
subject: Empirical Survey
subject: Έννοια του τόπου
subject: Βιωμένος χώρος και τόπος
subject: Χώρος και Τόπος
subject: Ανθρωπογεωγραφία
subject: Συμμετοχικές διαδικασίες
subject: Participatory Approach
subject: Human Geography
subject: FOS: Social and economic geography

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Γεωπληροφορική”
title: Έλεγχος της δύναμης στίλβωσης επιφανειών σε κέντρο κατεργασιών CNC
titleType: AlternativeTitle
Creators: name: Kousanas, Angelos
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Έλεγχος
Στίλβωση
Έλεγχος δύναμης
Ιδιοσυσκευή
Stick slip

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Συστήματα Αυτοματισμού”
CHEMICAL SAFETY: A MODEL PROGRAM FOR SMALL COLLEGES
Creators: name: Burns, Michael E.
Publisher: name: Maryland Shared Open Access Repository
Year: 1985

description: Chemical safety has become a matter of growing social concern in recent years due to increasing public recognition of the potential health effects of chemical exposures. Federal and state regulation of chemicals has increased dramatically over the last two decades. Widespread media coverage of chemical contamination at Love Canal, Times Beach, and Bhopal have made these names household words that conjure up images of dying people and deserted towns. Although the public has little knowledge or understanding of these incidents - its perception is that chemicals are dangerous and should be feared. This fear is apparent in our court systems, swamped by suits alleging harm from chemical exposures. There is no reason to believe that this level of public concern will decrease in the future. Just the opposite is true. Highly publicized incidents of chemical contamination will continue to occur - prompting the public to demand even more regulation of chemicals. A sagacious institutional response to these trends would be to assume that such incidents, albeit smaller in scope, can occur at any institution that handles chemicals and that a chemical safety program should be instituted to minimize their adverse consequences. This model was developed at a small, liberal arts college with approximately 1200 undergraduate students. Although the college has both chemistry and biology departments, the model is specifically addressed to the biology department (hereafter "the department."). It can easily be adopted by other departments or entire institutions with minimal adaptation.
The Culture Based Model: Constructing a Model of Culture
Creators: name: Young, Patricia
Publisher: name: International Forum of Educational Technology & Society
Year: 2008

description: Recent trends reveal that models of culture aid in mapping the design and analysis of information and communication technologies. Therefore, models of culture are powerful tools to guide the building of instructional products and services. This research examines the construction of the culture based model (CBM), a model of culture that evolved from historical and linguistic analyses of instructional products designed by and for African Americans. The findings extrapolated from the analyses reveal a treasure of cultural remnants. The cultural remnants provide evidence of how culture manifested in the instructional products. This data was further refined and generalized for a cross-cultural audience, resulting in the design factors of CBM. CBM is an intercultural instructional design framework that guides designers through the management, design, development, and assessment process while taking into account explicit culture-based considerations. The structure of CBM is presented and some ideas on its practical application are offered.
Surface plasmon polaritons assisted diffraction in periodic subwavelength holes of metal films with reduced interplane coupling
Creators: name: Fang, Xu
name: Li, Zhiyuan
name: Long, Yongbing
name: Wei, Hongxiang
name: Liu, Rongjuan
name: Ma, Jiyun
name: Kamran, M.
name: Zhao, Huaying
name: Han, Xiufeng
name: Zhao, Bairu
name: Qiu, Xianggang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Metal films grown on Si wafer perforated with a periodic array of subwavelength holes have been fabricated and anomalous enhanced transmission in the mid-infrared regime has been observed. High order transmission peaks up to Si(2,2) are clearly revealed due to the large dielectric constant contrast of the dielectrics at the opposite interfaces. Si(1,1) peak splits at oblique incidence both in TE and TM polarization, which confirms that anomalous enhanced transmission is a surface plasmon polaritons (SPPs) assisted diffraction phenomenon. Theoretical transmission spectra agree excellently with the experimental results and confirm the role of SPPs diffraction by the lattice.
description: 4 pages, 5 figures, 26 references
The Role of Giant Impacts in Planet Formation
Creators: name: Gabriel, Travis S. J.
name: Cambioni, Saverio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Planets are expected to conclude their growth through a series of giant impacts: energetic, global events that significantly alter planetary composition and evolution. Computer models and theory have elucidated the diverse outcomes of giant impacts in detail, improving our ability to interpret collision conditions from observations of their remnants. However, many open questions remain, as even the formation of the Moon, a widely suspected giant-impact product for which we have the most information, is still debated. We review giant-impact theory, the diverse nature of giant-impact outcomes, and the governing physical processes. We discuss the importance of computer simulations, informed by experiments, for accurately modeling the impact process. Finally, we outline how the application of probability theory and computational advancements can assist in inferring collision histories from observations, and we identify promising opportunities for advancing giant-impact theory in the future.
 $\bullet$ Giant impacts exhibit diverse possible outcomes leading to changes in planetary mass, composition, and thermal history depending on the conditions.
 $\bullet$ Improvements to computer simulation methodologies and new laboratory experiments provide critical insights into the detailed outcomes of giant impacts.
 $\bullet$ When colliding planets are similar in size, they can merge or escape one another with roughly equal probability, but with different effects on their resulting masses, densities, and orbits.
 $\bullet$ Different sequences of giant impacts can produce similar planets, encouraging the use of probability theory to evaluate distinct formation hypotheses.
description: Published open-access article posted with permission from journal
Fast Convergence of Path Integrals for Many-body Systems
Creators: name: Bogojevic, Aleksandar
name: Vidanovic, Ivana
name: Balaz, Antun
name: Belic, Aleksandar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We generalize a recently developed method for accelerated Monte Carlo calculation of path integrals to the physically relevant case of generic many-body systems. This is done by developing an analytic procedure for constructing a hierarchy of effective actions leading to improvements in convergence of $N$-fold discretized many-body path integral expressions from 1/N to $1/N^p$ for generic $p$. In this paper we present explicit solutions within this hierarchy up to level $p=5$. Using this we calculate the low lying energy levels of a two particle model with quartic interactions for several values of coupling and demonstrate agreement with analytical results governing the increase in efficiency of the new method. The applicability of the developed scheme is further extended to the calculation of energy expectation values through the construction of associated energy estimators exhibiting the same speedup in convergence.
description: 20 pages, 6 figures, 1 table
The Misdirection of Photon - Mistake of Classical Theory and the Way to Return to Classical Theory.pdf
Creators: name: Langlang Xu
Publisher: name: figshare
Year: 2021
Subjects: subject: 20502 Lasers and Quantum Electronics
subject: FOS: Physical sciences
subject: 20504 Photonics, Optoelectronics and Optical Communications
subject: Quantum Mechanics
subject: 20604 Quantum Optics

description: It is not so much the photon that is determined by the methods of observation, but rather the incompleteness of the methods of observation that makes it impossible to observe both properties simultaneously. Of course, just saying that is not convincing, this paper will end with a new observation method that can detect both properties simultaneously. Before the experiment, we need to solve the crux of the problem, "wave-particle duality".
Additional file 1 of Prevalence and characteristics of patients with heart failure needing palliative care
Creators: name: Arenas Ochoa, Luisa Fernanda
name: González-Jaramillo, Valentina
name: Saldarriaga, Clara
name: Lemos, Mariantonia
name: Krikorian, Alicia
name: Vargas, John Jairo
name: Gómez-Batiste, Xavier
name: Gonzalez-Jaramillo, Nathalia
name: Eychmüller, Steffen
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: Additional file 1: Supplementary Material 1. STROBE Statement—Checklist of items that should be included in reports of cross-sectional studies.
Flaxman's Homer illustrations
Creators: name: Stuart, John Radcliffe
Publisher: name: University of British Columbia
Year: 2010

description: Since their appearance in 1793 John Flaxman's illustrations to Homer's Iliad and Odyssey have been associated with the ancient art that inspired their commission. In this thesis they are examined from a standpoint other than that adopted in the major literature. Besides sustaining Flaxman's own assertion that the designs were to be used for sculpture, their conception is related to outline designs submitted to his former emloyer of 12 years, industrialist Josiah Wedgwood. More significantly, their most conspicuous characteristics--their two-dimensional space, absence of colour, texture, and detail and most noticeably their rendering in simple outline—are, for the first time, placed in another context of considerable importance in the 18th Century. Line drawing and its multiple-production counterpart, line engraving, were the representational modes of choice in the transmission of essential ideas in a wide variety of disciplines including his own designs for Wedgwood. Exclusive of the connection with ancient art, simple line would have been regarded as the most suitable form of illustration for the epic poems which were being studied at the time as models of the essential human society. This thesis treats Flaxman's designs as one aspect of the effort to define universal truths and the related need to create conceptual models of them in the 18th Century. To establish the designs in this-j broader context, the first four chapters set out in succession: the search for, and representation of, the essential in the 18th Century; Flaxman's relationship to it with special reference to his education and 12 year association with Wedgwood; the production of the Homer designs themselves from his studies of art works he had seen and, the critical reviews of the illustrations and their subsequent adoption by other artists as sources of inspiration. The thesis concludes by critically analyzing Flaxman's achievement, reviewing his objectives for the series and relating the designs to industrial/workshop drawings by Flaxman and other contemporary artists.
Non-hierarchical clustering methods on factorial
subspaces
Creators: name: Tortora, Cristina
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: Cluster analysis (CA) aims at finding homogeneous group of individuals, where homogeneous is referred to individuals that present similar characteristics. Many CA techniques already exist, among the non-hierarchical ones the most known, thank to its simplicity and computational property, is k-means method. However, the method is unstable when the number of variables is large and when variables are correlated. This problem leads to the development of two-step methods, they perform a linear transformation of variable into a reduced number of uncorrelated factors and CA is applied on this factors.
Two-steps methods minimize two different functions that can be in contrast between them and the first factorial step can in part obscure the clustering structure.
Iterative factorial clustering methods overcome these issues; they perform a factorial step and a clustering step iteratively, optimizing a common criterion. In this thesis a new factorial clustering method is proposed: Factorial Probabilistic Distance Clustering (FPDC). It is based on Probabilistic Distance (PD) Clustering that is a non-parametric probabilistic method to find homogeneous groups,
PD Clustering seeks for a set of K group centres maximising the empirical probabilities of belonging to a cluster of the n statistical units. As the number of variables tends to be large the solution tends to become unstable. FPDC consists of a two steps iterative procedure:  linear transformation of the initial data using Tucker 3 decomposition and PD-clustering on the transformed data. This thesis also shows that Tucker3 decomposition is a consistent transformation to project original data in a subspace defined according to the PD-Clustering criterion.
The integration of the PD Clustering and the Tucker3 factorial step makes the clustering more stable and permits to consider datasets with large number of variables and clusters having not elliptical form.
Cognitive Networks and Performance Drive fMRI-Based State Classification Using DNN Models
Creators: name: Kucukosmanoglu, Murat
name: Garcia, Javier O.
name: Brooks, Justin
name: Bansal, Kanika
Publisher: name: Maryland Shared Open Access Repository
Year: 2024
Subjects: Electrical Engineering and Systems Science - Signal Processing
Computer Science - Machine Learning
Quantitative Biology - Neurons and Cognition

description: Deep neural network (DNN) models have demonstrated impressive performance in various domains, yet their application in cognitive neuroscience is limited due to their lack of interpretability. In this study we employ two structurally different and complementary DNN-based models, a one-dimensional convolutional neural network (1D-CNN) and a bidirectional long short-term memory network (BiLSTM), to classify individual cognitive states from fMRI BOLD data, with a focus on understanding the cognitive underpinnings of the classification decisions. We show that despite the architectural differences, both models consistently produce a robust relationship between prediction accuracy and individual cognitive performance, such that low performance leads to poor prediction accuracy. To achieve model explainability, we used permutation techniques to calculate feature importance, allowing us to identify the most critical brain regions influencing model predictions. Across models, we found the dominance of visual networks, suggesting that task-driven state differences are primarily encoded in visual processing. Attention and control networks also showed relatively high importance, however, default mode and temporal-parietal networks demonstrated negligible contribution in differentiating cognitive states. Additionally, we observed individual trait-based effects and subtle model-specific differences, such that 1D-CNN showed slightly better overall performance, while BiLSTM showed better sensitivity for individual behavior; these initial findings require further research and robustness testing to be fully established. Our work underscores the importance of explainable DNN models in uncovering the neural mechanisms underlying cognitive state transitions, providing a foundation for future work in this domain.
Wave-particle duality and quantum superposition states are explained based on classical theory
Creators: name: Langlang Xu
Publisher: name: figshare
Year: 2021
Subjects: subject: 20502 Lasers and Quantum Electronics
subject: FOS: Physical sciences
subject: 20504 Photonics, Optoelectronics and Optical Communications
subject: Quantum Mechanics
subject: 20604 Quantum Optics

description: As one of the pillars of quantum mechanics, superposition state(Silverman, [2008]) has many disputes. Many people give up the classical theory because the classical theory cannot give a reasonable explanation for the “single-photon double-slit interference experiment” and the delayed-choice experiment. The problem of the classical theory lies in the wave-particle duality of light (e.g.Herbert[1985]). In this paper, a new interpretation of the light nature will be proposed based on the classical theory, and the new theory will be used to explain the superposition state and the Hardy paradox (e.g.Hardy,[1992]). At the same time, a falsification experiment is proposed for the collapse of superposition states.
Status of the Hadronic Tau Determination of V_us
Creators: name: Maltman, K.
name: Wolfe, C. E.
name: Banerjee, S.
name: Nugent, I.
name: Roney, J. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We update the extraction of |V_{us}| from hadronic tau decay data in light of recent BaBar and Belle results on the branching fractions of a number of important strange decay modes. A range of sum rule analyses is performed, particular attention being paid to those based on "non-spectral weights", developed previously to bring the slow convergence of the relevant integrated D=2 OPE series under improved control. Results from the various sum rules are shown to be in good agreement with one another, but ~3 sigma below expectations based on 3-family unitarity. Important avenues for future study are briefly discussed.
description: 9 pages, 2 figures, 1 table. Combined report on talks presented at the 4th International Conference on Flavor Physics, Beijing, China, Sept. 24-28, 2007 and QCD Downunder 2, Auckland, NZ, Jan. 17-19, 2008
title: Ανάλυση αποζημιώσης ανισορροπιών σε ευρωπαϊκούς μηχανισμούς εξισορρόπησης ηλεκτρικής ενέργειας
titleType: AlternativeTitle
Creators: name: Panetas, Foivos
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Ενεργειακές αγορές
Μηχανισμοί αποζημίωσης

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Παραγωγή και Διαχείριση Ενέργειας”
Epidemiologia molecolare di Klebsiella pneumoniae produttore di beta-lattamasi ad ampio spettro (ESBL) circolante in una Terapia Intensiva Neonatale
Creators: name: Bagattini, Maria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: The molecular epidemiology of extended-spectrum beta-lactamase (ESBL)-producing Klebsiella pneumoniae was investigated in the neonatal intensive care unit (NICU) of a university hospital in Italy from September 2002 to December 2004, when 233 colonizations and 19 infections by K. pneumoniae occurred. Molecular typing by pulsed- field gel electrophoresis (PFGE) and dendrogram analysis of ESBL-producing K. pneumoniae isolates identified two distinct PFGE patterns B and C, that were sequentially isolated and that differed from one epidemic clone of PFGE type A isolated during 1996 in the same ward. Antimicrobial susceptibility patterns of ESBL-producing K. pneumoniae epidemic clones of PFGE type B and C showed an identical antibiotype, that differed from clone of PFGE type A for gentamicin resistance. DNA sequencing of amplified blaTEM and blaSHV genes resulted in the detection of a novel blaTEM ESBL gene, blaTEM-136, along with blaSHV-1 gene, in chromosomal and plasmid DNA from K. pneumoniae of PFGE type A, respectively, and blaTEM-1 and blaSHV-12 genes in chromosomal and plasmid DNA from K. pneumoniae epidemic clone of PFGE type B and C, respectively. Conjugation experiments demonstrated that resistance to third generation cephems, along with blaSHV-12 gene, was transferred from K.  pneumoniae epidemic strains of PFGE type B and C to a susceptible E. coli host at a frequency of 4x 10-6 and 1 x 10-6 CFU/recipient cells, respectively. Our data suggest that the selection of ESBL producing clones and the transfer of blaSHV-12 ESBL gene between different clones were responsible for the spread of K. pneumoniae in the NICU.
Additional file 2 of Prevalence and characteristics of patients with heart failure needing palliative care
Creators: name: Arenas Ochoa, Luisa Fernanda
name: González-Jaramillo, Valentina
name: Saldarriaga, Clara
name: Lemos, Mariantonia
name: Krikorian, Alicia
name: Vargas, John Jairo
name: Gómez-Batiste, Xavier
name: Gonzalez-Jaramillo, Nathalia
name: Eychmüller, Steffen
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: Additional file 2: Supplementary Material 2. Clinical and demographic characteristics of patients included in the study.
Toward 2D Dynamo Models Calibrated by Global 3D Relativistic Accretion Disk Simulations
Creators: name: Duez, Matthew D.
name: Cadenhead, Courtney L.
name: Etienne, Zachariah B.
name: Kelly, Bernard
name: Werneck, Leonardo R.
Publisher: name: Maryland Shared Open Access Repository
Year: 2024
Subjects: Astrophysics - High Energy Astrophysical Phenomena
General Relativity and Quantum Cosmology

description: Two-dimensional models assuming axisymmetry are an economical way to explore the long-term evolution of black hole accretion disks, but they are only realistic if the feedback of the nonaxisymmetric turbulence on the mean momentum and magnetic fields is incorporated. Dynamo terms added to the 2D induction equation should be calibrated to 3D MHD simulations. For generality, the dynamo tensors should be calibrated as functions of local variables rather than explicit functions of spatial coordinates in a particular basis. In this paper, we study the feedback of non-axisymmetric features on the 2D mean fields using a global 3D, relativistic, Cartesian simulation from the IllinoisGRMHD code. We introduce new methods for estimating overall dynamo alpha and turbulent diffusivity effects as well as measures of the dominance of non-axisymmetric components of energies and fluxes within the disk interior. We attempt closure models of the dynamo EMF using least squares fitting, considering both models where coefficient tensors are functions of space and more global, covariant models. None of these models are judged satisfactory, but we are able to draw conclusions on what sorts of generalizations are and are not promising.
Active power filters: behaviour and performance analysis
Creators: name: Tricoli, Pietro
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Negli ultimi anni i dispositivi di elettronica di potenza si sono diffusi in differenti campi di applicazione e per diversi impieghi. L’ampliamento dei loro campi di applicazione è legato alla conoscenza del comportamento dei dispositivi di elettronica di potenza e delle loro prestazioni. Uno dei campi applicativi di maggiore interesse è quello della compensazione dei carichi elettrici, cioè il filtraggio attivo delle armoniche di corrente assorbite, lo sbilanciamento delle correnti e / o la compensazione della potenza reattiva richiesta. Per la realizzazione della compensazione richiesta, è necessario l’impiego di un opportuno software di controllo dei dispositivi di elettronica di potenza. Questi ultimi hanno caratteristiche elettriche non lineari che portano a complicazioni delle espressioni analitiche del loro modello matematico. Anche se il modello matematico dei filtri attivi è descritto da equazioni non lineari, il ricorso a opportune trasformazioni integrali può talvolta rendere possibile la sua risoluzione analitica in forma chiusa. L’analisi del comportamento dei filtri attivi di potenza è stato perciò condotto mediante l’impiego di una procedura matematica che fa uso della z-trasformata modificata. La soluzione, valida sia al transitorio che in condizioni di “regime”, è espressa attraverso funzioni matematiche elementari. La soluzione analitica presenta particolari vantaggi perché non solo consente di comprendere facilmente il comportamento dei filtri attivi e l’influenza dei valori assunti dai parametri caratteristici, ma fornisce anche delle direttive per la progettazione degli elementi passivi del filtro e l’implementazione di opportune tecniche di controllo. Sulla base degli studi teorici fatti sul modello matematico di un filtro attivo di tipo parallelo, è stato progettato un algoritmo di controllo che realizzi la compensazione di un assegnato contenuto armonico di corrente e della potenza reattiva richiesta dal carico. L’algoritmo, di validità generale, può essere impiegato anche nel caso di tensioni non simmetriche e correnti squilibrate. L’uscita dell’algoritmo di alimentazione è il segnale di riferimento per la modulazione SVM della tensione dell’inverter che consente di ottenere effettivamente la compensazione desiderata. Per verificare la correttezza e l’accuratezza dei risultati teorici, il modello matematico proposto e la procedura di soluzione seguita sono stati valicati infine da prove sperimentali condotte su un filtro attivo di tipo parallelo connesso alla rete di distribuzione.
Studio quali-quantitativo della componente lipidica del grasso lattico di bufala: effetto della stagionalità, dell'alimentazione e messa a punto di un metodo di valutazione della genuinità
Creators: name: Lambiase, Gianfranco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: [ITALIANO] Il settore lattiero-caseario rappresenta uno dei comparti principali del sistema agro-alimentare nazionale.
Attualmente la consistenza dell’allevamento bufalino in Italia è di poco superiore ai 160000 capi ma negli ultimi anni si è registrata una crescita costante in controtendenza rispetto al continuo calo del patrimonio bovino nazionale.
E’ soprattutto la produzione di latte per la trasformazione in mozzarella di bufala  e sottoprodotti della lavorazione la  principale opportunità di sviluppo di questo tipo di allevamento.
Tale trend del mercato ha inevitabilmente accentuato la problematica delle frodi e delle metodiche analitiche per rilevarle, suscitando attenzione da parte dei produttori, consumatori ed organi di controllo.
La sperimentazione ha avuto come obiettivo la caratterizzazione della componente lipidica del latte di bufala alla luce delle fonti di variabilità stagionale ed alimentare.
Dai dati ottenuti utilizzando gascromatografia ad alta risoluzione (HRGC) è stato possibile ricavare dei descrittori lipidici di genuinità. / [ENGLISH] Milk sector is one of the most important fields of national agroindustrial system. Nowadays Italian buffalo breeding is above of 160000 head but, in the last year it is possible to underline a constant growth opposite to continuous decrease of national cows breeding.
The main development opportunity of this breeding is the production of milk for buffalo cheese and other cheese by products.
This market trend emphasize milk adulteration problems and analytical methods for evaluation, producing great attention to producers, consumers and control authority.
The aim of this work were the milk fat characterization to light of seasonal and feed variability factors.
The results  obtain to high resolution gas chromatography analysis (HRGC), show that it is possible to outline a lipidic descriptor in order to determine milk fat genuineness.
Large planets may not form fractionally large moons
Creators: name: Nakajima, Miki
name: Genda, Hidenori
name: Asphaug, Erik
name: Ida, Shigeru
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: One of the unique aspects of Earth is that it has a fractionally large Moon, which is thought to have formed from a Moon-forming disk generated by a giant impact. The Moon stabilizes the Earth's spin axis at least by several degrees and contributes to Earth's stable climate. Given that impacts are common during planet formation, exomoons, which are moons around planets in extrasolar systems, should be common as well, but no exomoon has been confirmed. Here we propose that an initially vapor-rich moon-forming disk is not capable of forming a large moon because growing moonlets, which are building blocks of a moon, experience strong gas drag and quickly fall toward the planet. Our impact simulations show that terrestrial and icy planets that are larger than $\sim 1.3-1.6 R_\oplus$ produce entirely vapor disks, which fail to form a large moon. This indicates that (1) our model supports the Moon-formation models that produce vapor-poor disks and (2) rocky and icy exoplanets whose radii are smaller than $\sim 1.6 R_\oplus$ are ideal candidates for hosting fractionally large exomoons.
description: This paper was published in 2022
Nonuniqueness of scattering amplitudes at special points
Creators: name: Natsuume, Makoto
name: Okamura, Takashi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We point out little discussed phenomenon in elementary quantum mechanics. In one-dimensional potential scattering problems, the scattering amplitudes are not uniquely determined at special points in parameter space. We examine a few explicit examples. We also discuss the relation with the pole-skipping phenomena recently found in holographic duality. In the holographic pole-skipping, the retarded Green's functions are not uniquely determined at imaginary Matsubara frequencies. It turns out that this universality comes from the fact that the corresponding potential scattering problem has the angular momentum potential.
description: 14 pages, ReVTeX4.2; v2: several clarifications, published version
On the nature of the short duration GRB 050906
Creators: name: Levan, A. J.
name: Tanvir, N. R.
name: Jakobsson, P.
name: Chapman, R.
name: Hjorth, J.
name: Priddey, R. S.
name: Fynbo, J. P. U.
name: Hurley, K.
name: Jensen, B. L.
name: Johnson, R.
name: Gorosabel, J.
name: Castro-Tirado, A. J.
name: Jarvis, M.
name: Watson, D.
name: Wiersema, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present deep optical and infrared observations of the short duration GRB 050906. Although no X-ray or optical/IR afterglow was discovered to deep limits, the error circle of the GRB (as derived from the Swift BAT) is unusual incontaining the relatively local starburst galaxy IC328. This makes GRB 050906 a candidate burst from a soft-gamma repeater, similar to the giant flare from SGR 1806-20. The probability of chance alignment of a given BAT position with such a galaxy is small (<1%), although the size of the error circle (2.6 arcminute radius) is such that a higher-z origin can't be ruled out. Indeed, the error circle also includes a moderately rich galaxy cluster at z=0.43, which is a plausible location for the burst given the apparent preference that short GRBs have for regions of high mass density. No residual optical or infrared emission has been observed, either in the form of an afterglow or later time emission from any associated supernova-like event. We discuss the constraints these limits place on the progenitor of GRB 050906 based on the expected optical signatures from both SGRs and merging compact object systems.
description: 8 pages, 5 figures, accepted for publication in MNRAS
Magnetic fields and gas in the cluster influenced spiral galaxy NGC4254 - I. Radio and X-rays observations
Creators: name: Chyzy, K. T.
name: Ehle, M.
name: Beck, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Radio observations can show how cluster galaxies are affected by various environmental factors. We made three frequency radio-polarimetric VLA observations and performed sensitive XMM-Newton observations in X-rays and UV light of NGC4254. The distribution of total radio intensity at 8.46 4.86 GHz reveals a global asymmetry with a more diffuse and almost two times larger extension to the north than to the south. The radio polarized intensity is even more asymmetric, showing a strange bright ridge in the southern disk edge, displaced to the downstream side of the local density wave. Magnetic arms can be also seen in other disk portions, mostly avoiding nearby optical spiral arms. Spatially resolved emission of hot X-ray gas from the whole galactic disk, with its soft component closely tracing star-forming regions, is detected. The slope of the local radio nonthermal-infrared relation is <1, thus smaller than for the radio thermal-infrared one (>1). Using the radio thermal emission-based star formation rate (SFR) we find higher extinction in more Halpha luminous star-forming regions with a power-law slope of 0.83. The galaxy's estimated mean SFR of 0.026 M_sun/yr/kpc^2 is three times larger than in other spirals of similar Hubble type. NGC4254 seems to belong to the class of `young' Virgo cluster members, which recently experienced a gravitational encounter at the cluster's periphery, which perturbed its spiral arms by tidal forces and triggered a burst of star-formation which still maintains strong radio and infrared emissions. Tidal forces could also sheared the magnetic field in the southern disk portion and led to the observed polarized ridge, though, magnetic field compression by weak ram pressure forces of the cluster gas cannot be excluded.
description: 17 pages, 15 figures, accepted for publication in A&A
Additional file 5 of Short-term functional outcome in psychotic patients: results of the Turku early psychosis study (TEPS)
Creators: name: Salokangas, Raimo K. R.
name: From, Tiina
name: Ilonen, Tuula
name: Luutonen, Sinikka
name: Heinimaa, Markus
name: Armio, Reetta-Liina
name: Laurikainen, Heikki
name: Walta, Maija
name: Paju, Janina
name: Toivonen, Anna
name: Jalo, Päivi
name: Tuominen, Lauri
name: Hietala, Jarmo
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 5: Supplementary Table 4a. Repeated measures ANOVA of functional outcome for patients with first-episode psychosis (FEP, n = 105). Supplementary Table 4b. Repeated measures ANOVA of functional outcomes for patients with confirmed clinical high-risk to psychosis (CHR-P, n = 49). Supplementary Table 4c. Repeated measures ANOVA of functional outcome for patients with nonconfirmed clinical high-risk to psychosis (CHR-N, n = 40).
On-Surface Synthesis of Graphene Nanoribbons on Two-Dimensional Rare Earth-Gold Intermetallic Compounds
Creators: name: Que, Yande
name: Liu, Bin
name: Zhuang, Yuan
name: Xu, Chaoqiang
name: Wang, Kedong
name: Xiao, Xudong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Here, we demonstrate two reliable routes for the fabrication of armchair-edge graphene nanoribbons (GNRs) on TbAu2/Au(111), belonging to a class of two-dimensional ferromagnetic rare earth-gold intermetallic compounds. On-surface synthesis directly on TbAu2 leads to the formation of GNRs, which are short and interconnected with each other. In contrast, the intercalation approach - on-surface synthesis of GNRs directly on Au(111) followed by rare earth intercalation - yields GNRs on TbAu2/Au(111), where both the ribbons and TbAu2 are of high quality comparable with those directly grown on clean Au(111). Besides, the as-grown ribbons retain the same band gap while changing from p-doping to weak n-doping mainly due to a change in the work function of the substrate after the rare earth intercalation. The intercalation approach might also be employed to fabricate other types of GNRs on various rare earth intermetallic compounds, providing platforms to tailor the electronic and magnetic properties of GNRs on magnetic substrates.
description: 25 pages including 5 figures in the main text and 6 figures in the supporting information
A transactional quest for health
Creators: name: Soux, Susan Isabel
Publisher: name: University of British Columbia
Year: 2010

description: The present thesis is a study of the process of development of specific health care services in lower mainland B.C. The major questions posed are: how does personal experience relate to one's choice of therapeutic service, and how do interacting social factors direct or influence the form and content of a selection of health care services? The institutions examined are family medicine, a feminist health centre and acupuncture. Ethnographic research was carried out through informal, loosely directed interviews with practitioners and patients or clients of these institutions. The study focusses on the choices made by individuals as outcomes of personal experience; experience seen in the context of transactions. Transactions occur between individuals, between individuals and ideas, between individuals and institutions, and between two or more institutions. Transactions, when successful, reinforce previously established behavioural patterns. When unsuccessful they bring about changes in behaviour and are identified here as articulations. Behavioural patterns develop within individual lives and when these patterns take on aggregate form, new services or modification of pre-existing services emerge. Decisions and choices are made on the basis of personal and shared values, values which are situational. Outcomes of transactions reflect a negotiation process between transactors which frequently involves the juxtaposition of divergent values and goals. Personal experience, or transactions, occur within a framework of incentives and constraints imposed by broader, interacting social factors. When these factors are supportive of, or complementary to personal choices they facilitate the development of services. When social factors, external to the actual transaction occuring, are in conflict with personal choices they then restrict the development of services. Personal choice, mediated by interacting social variables, directs the formation of social structure, the network in which personal experience is enacted, and this very structure in turn affects personal experience. The types of health care services described to me under the rubrics of biopsychosocial medicine and holistic health are examples of services that reflect a highly differentiated social structure and respond to it by attempting to integrate the diversity. The services examined in this thesis reflect the values of the individuals that were instrumental in their development and consequently of the society of which they are a part.
On Oliver's p-group conjecture
Creators: name: Green, David J.
name: Héthelyi, László
name: Lilienthal, Markus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D15

description: Let S be a p-group for an odd prime p. Bob Oliver conjectures that a certain characteristic subgroup X(S) always contains the Thompson subgroup J(S). We obtain a reformulation of the conjecture as a statement about modular representations of p-groups. Using this we verify Oliver's conjecture for groups where S/X(S) has nilpotence class at most two.
description: 9 pages; terminology altered to conform to current usage
Forecast Aware Model-Driven Neural Learning for Air Quality Bias Correction
Creators: name: Hamer, Sophia
name: Sleeman, Jennifer
name: Stajner, Ivanka
Publisher: name: IEEE
Year: 2024
Subjects: Wildfires
Gases
Predictive models
Air quality
Atmospheric modeling
Weather forecasting
Training

description: IGARSS 2024 - 2024 IEEE International Geoscience and Remote Sensing Symposium, Athens, Greece, 07-12 July 2024
description: Poor air quality can have a significant impact on human health. The National Oceanic and Atmospheric Administration (NOAA) air quality forecasting guidance is challenged by the increasing presence of extreme air quality events due to extreme weather events such as wild fires and heatwaves. These extreme air quality events further affect human health. Traditional methods used to correct model bias make assumptions about linearity and the underlying distribution. Extreme air quality events tend to occur without a strong signal leading up to the event and this behavior tends to cause existing methods to either under or over compensate for the bias. Deep learning holds promise for air quality forecasting in the presence of extreme air quality events due to its ability to generalize and learn nonlinear problems. However, in the presence of these anomalous air quality events, standard deep network approaches that use a single network for generalizing to future forecasts, may not always provide the best performance even with a full feature-set including geography and meteorology. In this work we describe a method that combines unsupervised learning and a forecast-aware bi-directional Long Short-Term Memory (LSTM) network to perform bias correction for operational air quality forecasting using AirNow station data for ozone and PM2.5 in the continental US. Using an unsupervised clustering method trained on station geographical features such as latitude and longitude, urbanization, and elevation, the learned clusters direct training by partitioning the training data for the LSTM networks. LSTMs are forecast-aware and implemented using a unique way to perform learning forward and backwards in time across forecasting days. When comparing the Root Mean Squared Error (RMSE) of the forecast model to the RMSE of the bias corrected model, the bias corrected model shows significant improvement - 27% lower RMSE for ozone - over the base forecast.
Fermionic T-Duality, Dual Superconformal Symmetry, and the Amplitude/Wilson Loop Connection
Creators: name: Berkovits, Nathan
name: Maldacena, Juan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that tree level superstring theories on certain supersymmetric backgrounds admit a symmetry which we call ``fermionic T-duality''. This is a non-local redefinition of the fermionic worldsheet fields similar to the redefinition we perform on bosonic variables when we do an ordinary T-duality. This duality maps a supersymmetric background to another supersymmetric background with different RR fields and a different dilaton. We show that a certain combination of bosonic and fermionic T-dualities maps the full superstring theory on $AdS_5 \times S^5$ back to itself in such a way that gluon scattering amplitudes in the original theory map to something very close to Wilson loops in the dual theory. This duality maps the ``dual superconformal symmetry'' of the original theory to the ordinary superconformal symmetry of the dual model. This explains the dual superconformal invariance of planar scattering amplitudes of N=4 super Yang Mills and also sheds some light on the connection between amplitudes and Wilson loops. In the appendix, we propose a simple prescription for open superstring MHV tree amplitudes in a flat background.
description: 48 pages, 2 figures