cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Seismic constraints on the internal structure of evolved stars: From high-luminosity RGB to AGB stars
Creators: name: Dréau, G.
name: Mosser, B.
name: Lebreton, Y.
name: Gehan, C.
name: Kallinger, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The space-borne missions CoRoT and Kepler opened up a new opportunity for better understanding stellar evolution by probing stellar interiors with unrivalled high-precision photometric data. Kepler has observed stellar oscillation for four years, which gave access to excellent frequency resolution that enables deciphering the oscillation spectrum of evolved red giant branch and asymptotic giant branch stars. The internal structure of stars in the upper parts of the red and asymptotic giant branches is poorly constrained, which makes the distinction between red and asymptotic giants difficult. We perform a thorough seismic analysis to address the physical conditions inside these stars and to distinguish them. We studied the oscillation mode properties of about 2.000 evolved giants in a model described by the asymptotic pressure-mode pattern of red giants, which includes the signature of the helium second-ionisation zone. We extracted the mode properties up to the degree l = 3 and investigated their dependence on stellar mass, metallicity, and evolutionary status. We identify a clear difference in the signature of the helium second-ionisation zone between red and asymptotic giants. We also detect a clear shortage of the energy of l = 1 modes after the core-He-burning phase. Furthermore, we note that the mode damping observed on the asymptotic giant branch is similar to that observed on the red giant branch. We highlight that the signature of the helium second-ionisation zone varies with stellar evolution. This provides us with a physical basis for distinguishing red giant branch stars from asymptotic giants. Here, our investigation of stellar oscillations allows us to constrain the physical processes and the key events that occur during the advanced stages of stellar evolution, with emphasis on the ascent along the asymptotic giant branch, including the asymptotic giant branch bump.
description: 20 pages, 12 figures, accepted in A&A
Quantum White Noise and the Master Equation for Gaussian Reference States
Creators: name: Gough, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We modify the Araki-Woods double Fock space construction in order to describe general squeezed Gaussian states and use this to represent squeezed quantum stochastic noise processes. Associated master equations are derived.
description: 8 pages, no pictures
Υπερωθητική ανάλυση μεταλλικών κατασκευών υπό σεισμικά φορτία με βάση της άμεσες μεθόδους πλαστικότητας
Creators: name: Αμπατζής, Αλέξιος Θ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Μεταλλικές κατασκευές
Αντισεισμικός σχεδιασμός
Υπερωθητική ανάλυση
Ανάλυση προσαρμογής
Earthquake design
Pushover analysis
Shakedown

description: Η μεγάλης σημασίας, για την κοινωνία και οικονομία, απόκριση των ελαστοπλαστικών κατασκευών σε σεισμικά φορτία και η διαθεσιμότητα των υπολογιστικών εργαλείων των άμεσων μεθόδων πλαστικότητας μορφώνουν το ερευνητικό πλαίσιο από το οποίο πορίζεται η παρούσα διατριβή το λόγο ύπαρξής της. Κεντρική ιδέα αυτής της εργασίας είναι η εκμετάλλευση των άμεσων μεθόδων της πλαστικότητας με σκοπό την ανάπτυξη τεχνικής για την αποτίμηση της σεισμικής συμπεριφοράς των μεταλλικών κατασκευών λαμβάνοντας υπόψη και την επιρροή ανώτερων ιδιομορφών. Μελετάται η δυνατότητα αποτίμησης του αβέβαιου χαρακτήρα των σεισμικών δυνάμεων μέσω της αβέβαιης οριακής ανάλυσης και η προσπάθεια αυτή καταλήγει στην πρόταση της τεχνικής οριακής υπερωθητικής ανάλυσης υπό ελλειψοειδή αβεβαιότητα (Robust Limit Analysis). Στη συνέχεια προτείνεται μια εναλλακτική τεχνική για την υπερωθητική ανάλυση πλαισιωτών μεταλλικών φορέων με βάση τις άμεσες μεθόδους της πλαστικότητας, η οποία ενσωματώνει τον κυκλικό χαρακτήρα των σεισμικών φορτίων. Η τεχνική αυτή καλείται υπερωθητική ανάλυση με βάση τον κρίσιμο δρόμο (LImit and Shakedown Analysis - Nonlinear Static Procedure, LISA-NSP) και αποτελεί το κύριο επίτευγμα της διατριβής
description: The social and economical impact of the response of elastoplastic structures to earthquakes, coupled with the availability of computational tools from LISA, form the research context from which this PhD thesis has derived. The possibility to assess the uncertain nature of the seismic forces acting on a structure is explored via the uncertain limit analysis. Several cases of linear and nonlinear parametric sets are presented and a technique consisting of two levels is proposed to perform uncertain limit analyses for these sets. This dissertation utilizes the direct methods of plasticity to develop a technique for the assessment of the seismic behavior of elastoplastic framed steel structures. A technique for the pushover analysis of skeletal structures is proposed, under the name LImit and Shakedown Analysis - Nonlinear Static Procedure. This technique exploits the cyclic nature of seismic loads and comprises the main achievement of this Thesis. The further elaboration of the locus results in the identification of critical load paths, defining load combinations in the equivalent earthquake forces' space. These critical combinations are qualified as the reference loading to be used in consequent Limit Pushover Analyses for the estimation of kinematic response quantities
Coherent Control of Ultracold Collisions with Chirped Light: Direction Matters
Creators: name: Wright, M. J.
name: Pechkis, J. A.
name: Carini, J. L.
name: Kallush, S.
name: Kosloff, R.
name: Gould, P. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate the ability to coherently control ultracold atomic Rb collisions using frequency-chirped light on the nanosecond time scale. For certain center frequencies of the chirp, the rate of inelastic trap-loss collisions induced by negatively chirped light is dramatically suppressed compared to the case of a positive chirp. We attribute this to a fundamental asymmetry in the system: an excited wavepacket always moves inward on the attractive molecular potential. For a positive chirp, the resonance condition moves outward in time, while for a negative chirp, it moves inward, in the same direction as the excited wavepacket; this allows multiple interactions between the wavepacket and the light, enabling the wavepacket to be returned coherently to the ground state. Classical and quantum calculations support this interpretation.
The Evolution of the Multiplicity of Embedded Protostars II: Binary Separation Distribution & Analysis
Creators: name: Connelley, Michael
name: Reipurth, Bo
name: Tokunaga, Alan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the Class I protostellar binary separation distribution based on the data tabulated in the companion paper. We verify the excess of Class I binary stars over solar-type main-sequence stars, especially at separations beyond 500 AU. Although our sources are in nearby star forming regions distributed across the entire sky (including Orion), none of our objects are in a high stellar density environment. The binary separation distribution changes significantly during the Class I phase, and the binary frequency at separations greater than 1000 AU declines steadily with respect to spectral index. Despite these changes, the binary frequency remains constant until the end of the Class I phase, when it drops sharply. We propose a scenario to account for the changes in the Class I binary separation distribution. This scenario postulates that companions with a separation greater than ~1000 AU were ejected during the Class 0 phase, but remain gravitationally bound due to the mass of the envelope. As the envelope dissipates, these companions become unbound and the binary frequency at wide separations declines. This scenario predicts that a large number of Class 0 objects should be non-hierarchical multiple systems, and that many Class I YSOs with a widely separated companion should also have a very close companion. We also find that Class I protostars are not dynamically pristine, and have experienced dynamical evolution before they are visible as Class I objects. For the first time, evidence is presented showing that the Class I binary frequency and the binary separation distribution strongly depend on the star forming environment. The reason for this dependence remains unclear.
description: 33 pages, 16 figures, accepted by the Astronomical Journal
Non-isotropy in the CMB power spectrum in single field inflation
Creators: name: Donoghue, John F.
name: Dutta, Koushik
name: Ross, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Contaldi et al. [1] have suggested that an initial period of kinetic energy domination in single field inflation may explain the lack of CMB power at large angular scales. We note that in this situation it is natural that there also be a spatial gradient in the initial value of the inflaton field, and that this can provide a spatial asymmetry in the observed CMB power spectrum, manifest at low multipoles. We investigate the nature of this asymmetry and comment on its relation to possible anomalies at low multipoles.
description: 25 pages, 12 figures. In this revised version, we include the Integrated Sachs-Wolfe effect, which was missing from the original. This modifies some results in the low multipoles. The comparison with experiment is slightly better but the change is not statistically significant
Επίδραση της προκλητής μείωσης του σωματικού βάρους στις παραμέτρους του οστικού μεταβολισμού: ο ρόλος της λεπτίνης
Creators: name: Γιαννούλης, Κυριάκος Ε.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Σωματικό βάρος
Λεπτίνη
Body weight
Leptin

description: Σε 45 παχύσαρκες μετα-εμμηνοπαυσιακές γυναίκες μελετήσαμε την επίδραση της μείωσης του ΣΒ επί της οστικής μάζας και τις παραμέτρους του οστικού μεταβολισμού. Εμφαση δόθηκε στο ρόλο της λεπτίνης
description: Aim: In this study we aimed to investigate in detail the relationship be-tween BW and BMD in obese PMW, the skeletons of which are under the in-fluence of two significant factors: 1) The menopause which favours bone loss and 2) the obesity which exerts a protective effect on bone density. Farther-more with provocative reduction of BW we assessed the potential changes in bone markers related to bone metabolism. Apart from anthropometric parame-ters we investigated also the role of leptin, adiponectin and NPY which, acaccording to recent data, apart from their regulatory effect on homeostasis of energy it seems that they have a significant role on the bone density
Exact boundary conditions in numerical relativity using multiple grids: scalar field tests
Creators: name: Calabrese, Gioel
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Cauchy-Characteristic Matching (CCM), the combination of a central 3+1 Cauchy code with an exterior characteristic code connected across a time-like interface, is a promising technique for the generation and extraction of gravitational waves. While it provides a tool for the exact specification of boundary conditions for the Cauchy evolution, it also allows to follow gravitational radiation all the way to infinity, where it is unambiguously defined. We present a new fourth order accurate finite difference CCM scheme for a first order reduction of the wave equation around a Schwarzschild black hole in axisymmetry. The matching at the interface between the Cauchy and the characteristic regions is done by transfering appropriate characteristic/null variables. Numerical experiments indicate that the algorithm is fourth order convergent. As an application we reproduce the expected late-time tail decay for the scalar field.
description: 14 pages, 5 figures. Included changes suggested by referees
Prediction of pile drivability from CPT and WEAP analysis
Creators: name: Wang, Jaiwei
Publisher: name: University of British Columbia
Year: 2009

description: Pile drivability is a difficult problem because of the complex dynamic pile-soil behaviour. The current procedure in predicting blow count during pile driving uses the Smith’s one-dimensional wave equation model with input appropriate soil resistances during pile driving. There is no general consensus to date on one approach for estimating the driving resistances in all types of soils. The cone penetration test (C PT) is a useful tool for detailed profiling of soil conditions at a site and has been found by many researchers to provide a reliable estimate of long term pile capacity as determined from a static loading test. An attempt has been made in this thesis to use the CPT directly to estimate pile driving resistance for use in pile drivability analysis. Several approaches were undertaken to estimate the driving resistances from the CPT, and the predicted blow counts from the wave equation analysis were compared to the field measured blow counts. Pile and soil data from three sites: UBC Pile Research Site, Tilbury Island Site and Evanston Campus of Northwestern University (ENCU) Site were analyzed. The piles included steel pipe piles of both closed and open ended as well as H pile. An empirical correlation approach is proposed which uses CPT cone bearing (qc) directly to estimate the driving toe resistances. The shaft resistances during driving, however, was estimated in a conventional way from static long term resistance calculated from correlations with CPT q,, data but was then multiplied by a set of empirical de termined reduction factors. The application of the proposed method to a steel pipe pile at another site location (not included in the above data base) is illustrated. Reasonable agreement is obtained between calculated and measured blow counts. Although the data base in this study is limited, the proposed method appears promis ing. More research is needed to check the applicability of this method to different soil condition and other pile types.
Star products, duality and double Lie algebras
Creators: name: Man'ko, Olga V.
name: Man'ko, Vladimir I.
name: Marmo, Giuseppe
name: Vitale, Patrizia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantization of classical systems using the star-product of symbols of observables is discussed. In the star-product scheme an analysis of dual structures is performed and a physical interpretation is proposed. At the Lie algebra level duality is shown to be connected to double Lie algebras. The analysis is specified to quantum tomography. The classical tomographic Poisson bracket is found.
description: 22 pages, no figures
Το υπερώο στη βυζαντινή ναοδομία
Creators: name: Τάντσης, Αναστάσιος Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Εκκλησίες
Γυναικωνίτες
Κατηχούμενα
Galleries
Women's space
Patronage
Katechumena

description: Τα υπερώα εισάγουν στους ναούς ένα δεύτερο λειτουργικό επίπεδο. Αναφέρονται ως χώρος διαχωρισμού τμήματος του εκκλησιάσματος. Μαρτυρούνται τρία είδη διαχωρισμού : ευγενείς από το λαό, γυναίκες από τους άντρες και ατελείς πιστοί (κατηχούμενοι-πεπτωκότες) από τέλειους χριστιανούς. Πλέον διαδεδομένη είναι η χρήση από τον αυτοκράτορα και τους ευγενείς. Η παρουσία των ευγενών γυναικών στα υπερώα βρίσκει αντίθετο το ιερατείο. Συνεπώς αναδεικνύεται η σπουδαιότητά τους ως χώρος προβεβλημένης παρουσίας εντός του ναού άμεσα συνδεδεμένη με την πραγματική ή συμβολική παρουσία του άρχοντα και των ανώτερων κοινωνικών τάξεων. Αναδεικνύονται, έτσι σε κύριο παράγοντα ανάπτυξης και εξέλιξης της βυζαντινής ναοδομίας. Η κατασκευή τους σχετίζεται με την εξέλιξη της χορηγίας λατρευτικών κτηρίων από τη αριστοκρατία και αποτελεί στοιχείο αποτύπωσης ιδεολογικού περιεχομένου πίσω από αυτή. Η εργασία οργανώνεται σε κεφάλαια στα οποία κυριαρχεί διαφορετική μεθοδολογική προσέγγιση. Με αυτό τον τρόπο αντιπαραβάλλονται και όλες οι απόψεις που έχουν εκφρασθεί στην έρευνα. Τη εργασία συνοδεύει εκτενής κατάλογος ναών με υπερώα
description: Galleries introduce a secondary functional level in churches. They are a space of segregating part of the congregation. This segragation is three-fold : nobility from the laity, women from men and incomplete(catechumens-sinners) from perfect faithful. Most commonly they are used by the emperor and other nobility. The presence of noble women brings on the objection of the priesthood. Their importance is established as a space of distinguished presence inside the church related to the actual or symbolic presence of the sovereign. Therefore galleries are recognized as an important factor in the development and evolution of Byzantine church architecture. Their construction relates to the evolution of Byzantine church architecture. Their construction relates to the evolution of patronage of ecclesiastic buildings and they constitute a feature of indicating the ideology behind this practice. The thesis is organized in chapters, each with a different methodological focus. Accordingly the options scattered in bibliography are being cross checked as well. The next is accompanied by an extensive catalogue of churches with galleries
Observational evidence for AGN fueling. I. The merging of NGC6104 with a companion
Creators: name: Smirnova, A. A.
name: Moiseev, A. V.
name: Afanasiev, V. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate in details the kinematics and morphology of the Seyfert galaxy NGC6104 in order to identify the mechanism of gas transportation to the active galactic nucleus (AGN). Our observational data were obtained at the 6-m Special Astrophysical Observatory telescope with the MPFS integral-field spectrograph and the SCORPIO universal device in three modes: direct imaging, a scanning Fabry-Perot interferometer, and long-slit spectroscopy. Images from the HST archive were invoked to study the structure of the circumnuclear region. An analysis of deep images has revealed that NGC6104 is in the phase of active merging with a companion galaxy. We have been able to study the detailed picture of ionized gas motions up to galactocentric distances of 14 kpc and to construct the stellar velocity field for the inner region. The radial gas motions toward the AGN along the central bar play a significant role at galactocentric distances of 1-5 kpc. In addition, we have detected an outflow of ionized gas from the nucleus that presumably resulted from the intrusion of a radio jet into the ambient interstellar medium. Using diagnostic diagrams, we estimate the contributions from the AGN and star formation to the galactic gas ionization. We estimate the bar pattern speed by the Tremaine-Weinberg method and show that the inner ring observed in the galactic images has a resonant nature. Two possible ring formation scenarios (before and during the interaction with a companion) are discussed.
description: 12 pages, 2 tables, 6 figures, accepted for publication in Astronomy Letters
Τεχνικές γεωλογικές συνθήκες στο Νομό Χανίων
Creators: name: Παυλάκη, Αικατερίνη Π.
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Γεωπεριβάλλον
Τεκτονική ανύψωση
Γεωλογικοί σχηματισμοί
Μορφολογικό ανάγλυφο
Λεκάνες απορροής
Geo-environment
Geo-factors
Tectonic uplift
Geological formations
Morphological relief
Drainage basins

description: Αντικείμενο της διατριβής αποτελεί η διερεύνηση των τεχνικών γεωλογικών συνθηκών του βόρειου-κεντρικού τμήματος του Νομού Χανίων. Η μεθοδολογία εκπόνησης βασίστηκε στην ποιοτική και ποσοτική ανάλυση και αξιολόγηση των επιμέρους γεωπαραγόντων και της αλληλοεπίδρασής τους στη διαμόρφωση των τεχνικογεωλογικών συνθηκών της περιοχής έρευνας. Τα αποτελέσματα που προέκυψαν αφορούν τα γεωδυναμικό-σεισμοτεκτονικό καθεστώς, τις γεωλογικές-τεκτονικές συνθήκες, τις γεωμορφολογικές, τις κλιματολογικές και γεωμηχανικές
description: The aim of the present thesis is the investigation and assesment of the engineering geology conditions of the Northern-Central part of the Chania Prefectire(Crete). The methodology was vased on the qualitative and quantitative analysis and evaluation of various geo-factors. The results are related to : the geodynamic and seismotectonic setting, geological and tectonical conditions, geomorphological, climatic conditions, geomechanical properties of the geological formations and finaly all about the geo-factors interaction
SiO, 29SiO, and 30SiO emission from 67 oxygen-rich stars. A survey of 61 maser lines from 7 to 1 mm
Creators: name: Rizzo, J. R.
name: Cernicharo, J.
name: Garcia-Miro, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Circumstellar environments of oxygen-rich stars are among the strongest SiO maser emitters. Physical processes such as collisions, infrared pumping and overlaps favors the inversion of level population and produce maser emission at different vibrational states. Despite numerous observational and theoretical efforts, we still do not have an unified picture including all the physical processes involved in the SiO maser emission. The aim of this work is to provide homogeneous data in a large sample of oxygen-rich stars. We present a survey of 67 oxygen-rich stars from 7 to 1 mm, in their rotational transitions from J=1-0 to J=5-4, for vibrational numbers v from 0 to 6 in the three main SiO isotopologues. We have used one of the 34 m NASA antennas at Robledo and the IRAM 30 m radio telescope. The first tentative detection of a v=6 line is reported, as well as the detection of new maser lines. The highest vibrational levels seem confined to small volumes, presumably close to the stars. The J=1-0, v=2 line flux is greater than the corresponding v=1 in almost half of the sample, which may confirm a predicted dependence on the pulsation cycle. This database is potentially useful in models which should consider most of the physical agents, time dependency, and mass-loss rates. As by-product, we report detections of 27 thermal rotational lines from other molecules, including isotopologues of SiS, H2S, SO, SO2, and NaCl.
description: 128 pages, 11 figures, 6 tables. Accepted for publication in Astrophysical Journal Supplement Series. Availability of data and tables in the journal repository
Grammatical elicitation: Relative clauses, classifier
Creators: name: Ruiz, Wendy
name: Dos Santos, Wesley
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: mam

description: Relative clauses with an animate argument as the head of the RC in the position of direct object (verb 'see'), indirect object (verbs 'send' and 'give'), possessor (verb 'borrow') and locative (verb 'sleep'); also includes 11 noun phrases to test the semantics of a classifier [twits] meaning 'flat'
Εφαρμογή των ετερο-Diels-Alder αντιδράσεων νιτροζοαλκενίων στη σύνθεση βιομιμητικών μορίων
Creators: name: Μάσεν, Ζωή Στ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: α-Αμινοξέα
Αζασάκχαρα
2-Νιτροζοακρυλικός αιθυλεσέρας
C-Νιτροζοακρυλικός αιθυλεστέρας
a-Aminoacids
Azasugars
C-glycosylated aminoacids
2-Nitrosoacrylate

description: Αναπτύχθηκε μία νέα μεθοδολογία που περιλαμβάνει την α)Hetero-Alder προσθήκη, 2-νιτροζοακρυλικού αιθυλεστέρα σε πλούσια ηλεκτρονικά αλκένια, β)αναγωγή με ΝαCNΒΗ3 του C=N δεσμού προς οξάζινες των οποίων η στερεοχημεία ελέγχεται από μία αντίδραση επιμερείωσης προς το θερμοδυναμικά σταθερότερο ισομερές, γ)προστασία της αμινομάδας με N-Boc και δ) τέλος αναγωγική διάνοιξη του δεσμού Ν-Ο τέσο στο προστατευμένο παράγωγο, όσο και στο μη προστατευμένο πρόδρομο. Η πορεία αυτή εφαρμόστηκε στη σύνθεση μη πρωτεϊνικής προέλευσης α-αμινοξέων, C-γλυκοζυλιωμένων αμινοξέων αλλά και σε μια προσπάθεια σύνθεσης του φυσικού προϊόντος Hyacinthacine B2 και του αντιληπτικού φαρμάκου S-Vigabatrin
description: The overall theme of this thesis deals with the possible applications of the general methods established in our lab, for the synthesis of biologically active compounds and natural products. This method involves (i)hetero-Diels-Alder addition of ethyl 2-nitrosoacrylate to electron rich alkenes and chiral enolethers, in most cases prepared from appropriate sugar derivatives, (ii) NaCNBH3 reduction of the C=N bond in the oxazines thus generated, the stereochemistry of the products being controlled by epimerization of the thermodynamically less stable isomer to the more stable one, (iii) protection of the N-H group as N-Boc and (iv) finally, N-O bond cleavage of both free and protected products which results in the formation of 4-hydroxyamino acid, or proline products, respectively
INTEGRATIVE APPROACHES FOR BIOLOGICAL THREAT PREVENTION AND RESPONSE - A MULTIDISCIPLINARY ANALYSIS
Creators: name: Brandl, Edenilson
Publisher: name: Zenodo
Year: 2023
Subjects: Biological Threats
Multidisciplinary Approach
Outbreak Detection
Lean Manufacturing
Laboratory Safety
International Trade Shows
Monoclonal Antibody Therapies
Security Measures
Preparedness and Response

description: This article provides a comprehensive exploration of integrative methodologies crucial for enhancing preparedness and response to biological threats in diverse scenarios. Drawing on principles from Lean Manufacturing, Quality Audit, Experimental Design, Knowledge of Laws, and other management frameworks, the study elucidates their application in outbreak pattern detection, resource allocation, laboratory safety, international trade show security, and therapeutic development. The synthesis of these approaches presents a holistic strategy for organizations and agencies to bolster their capabilities against potential biological attacks. The multidisciplinary nature of the analysis underscores the importance of a unified and proactive stance in addressing the complex challenges posed by biological threats across various domains.

 

Dieser Artikel bietet eine umfassende Untersuchung integrativer Methoden, die für die Verbesserung der Vorbereitung und Reaktion auf biologische Bedrohungen in verschiedenen Szenarien von entscheidender Bedeutung sind. Die Studie stützt sich auf Prinzipien aus Lean Manufacturing, Qualitätsaudit, experimentellem Design, Gesetzeskenntnis und anderen Managementrahmen und erläutert deren Anwendung bei der Erkennung von Ausbruchsmustern, der Ressourcenzuweisung, der Laborsicherheit, der Sicherheit auf internationalen Messen und der therapeutischen Entwicklung. Die Synthese dieser Ansätze stellt eine ganzheitliche Strategie für Organisationen und Behörden dar, um ihre Fähigkeiten gegen potenzielle biologische Angriffe zu stärken. Der multidisziplinäre Charakter der Analyse unterstreicht die Bedeutung einer einheitlichen und proaktiven Haltung bei der Bewältigung der komplexen Herausforderungen, die biologische Bedrohungen in verschiedenen Bereichen mit sich bringen.
An automated corrective action selective assistant
Creators: name: Fayek, Aminah
Publisher: name: University of British Columbia
Year: 2008

description: Automated daily site reporting as an integral part of a project management system has the potential to be the missing link for effective construction project monitoring and control. Problem trends over time can be detected more readily through the maintenance of daily site records that track problems occurring against activities; timely corrective action can thus be initiated more quickly. The goal of this thesis is to develop a schema to perform the automated interpretation of daily site records to identify activities that are experiencing difficulties; to identify the source(s) of these problems; to identify the types of problems resulting; to find collaborating information from the daily site records to validate the causes of these problems; and to suggest likely corrective actions. A framework is presented wherein each component of the analysis schema is defined. Fuzzy logic is used to define the imprecise relationships that exist between these components. A prototype system is developed to implement and test the schema. The components of the prototype are: a user interface; data files; an application program; an inference engine; and an expert rule base. The prototype is validated by way of several simple examples solved both manually and by the computer. A case study of a hypothetical construction project is also treated by automated interpretation to demonstrate the workability of the prototype on a multi-activity project. The model developed in this thesis would benefit from addition to and refinement of the expert rule base, and further investigation of the use of fuzzy logic to incorporate in the analysis other items of information that can be collected on site. A future system would make use of user feedback, reporting on which corrective actions have been implemented and their impacts on performance.
Squeezed hole spin qubits in Ge quantum dots with ultrafast gates at low power
Creators: name: Bosco, Stefano
name: Benito, Mónica
name: Adelsberger, Christoph
name: Loss, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Hole spin qubits in planar Ge heterostructures are one of the frontrunner platforms for scalable quantum computers. In these systems, the spin-orbit interactions permit efficient all-electric qubit control. We propose a minimal design modification of planar devices that enhances these interactions by orders of magnitude and enables low power ultrafast qubit operations in the GHz range. Our approach is based on an asymmetric potential that strongly squeezes the quantum dot in one direction. This confinement-induced spin-orbit interaction does not rely on microscopic details of the device such as growth direction or strain, and could be turned on and off on demand in state-of-the-art qubits.
Photometric Properties of the Most Massive High-Redshift Galaxies
Creators: name: Robertson, Brant
name: Li, Yuexing
name: Cox, Thomas J.
name: Hernquist, Lars
name: Hopkins, Philip F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the observable properties of the most massive high-redshift galaxies in the hierarchical formation scenario where stellar spheroid and supermassive black hole growth are fueled by gas-rich mergers. Combining high-resolution hydrodynamical simulations of the hierarchical formation of a z~6 quasar, stellar population synthesis models, template AGN spectra, prescriptions for interstellar and intergalactic absorption, and the response of modern telescopes, the photometric evolution of galaxies destined to host z~6 quasars are modeled at redshifts z~4-14. These massive galaxies, with enormous stellar masses of M_star ~10^11.5-10^12 M_sun. and star formation rates of SFR~10^3-10^4 M_sun yr^-1 at z>~7, satisfy a variety of photometric selection criteria based on Lyman-break techniques including V-band dropouts at z>~5, i-band dropouts at z>~6, and z-band dropouts at z>~7. The observability of the most massive high-redshift galaxies is assessed and compared with a wide range of existing and future photometric surveys including SDSS, GOODS/HUDF, NOAO WDFS, UKIDSS, the IRAC Shallow Survey, Pan-STARRS, LSST, and SNAP. Massive stellar spheroids descended from z~6 quasars will likely be detected at z~4 by existing surveys, but owing to their low number densities the discovery of quasar progenitor galaxies at z>7 will likely require future surveys of large portions of the sky (>~0.5%) at wavelengths lambda>1 micron. The detection of rare, star-bursting, massive galaxies at redshifts z>~6 would provide support for the hierarchical formation of the earliest quasars and characterize the primitive star-formation histories of the most luminous elliptical galaxies.
description: Version accepted by ApJ (5/21/2007), for high-resolution figures see http://kicp.uchicago.edu/~brant/astro-ph/massive_high_redshift_galaxies/
Decentralized Maximum Likelihood Estimation for Sensor Networks Composed of Nonlinearly Coupled Dynamical Systems
Creators: name: Barbarossa, Sergio
name: Scutari, Gesualdo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper we propose a decentralized sensor network scheme capable to reach a globally optimum maximum likelihood (ML) estimate through self-synchronization of nonlinearly coupled dynamical systems. Each node of the network is composed of a sensor and a first-order dynamical system initialized with the local measurements. Nearby nodes interact with each other exchanging their state value and the final estimate is associated to the state derivative of each dynamical system. We derive the conditions on the coupling mechanism guaranteeing that, if the network observes one common phenomenon, each node converges to the globally optimal ML estimate. We prove that the synchronized state is globally asymptotically stable if the coupling strength exceeds a given threshold. Acting on a single parameter, the coupling strength, we show how, in the case of nonlinear coupling, the network behavior can switch from a global consensus system to a spatial clustering system. Finally, we show the effect of the network topology on the scalability properties of the network and we validate our theoretical findings with simulation results.
description: Journal paper accepted on IEEE Transactions on Signal Processing
CP Asymmetry in Charged Higgs Decays in MSSM
Creators: name: Frank, Mariana
name: Turan, Ismail
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss and compare the charge-parity (CP) asymmetry in the charged Higgs boson decays H -> \bar{u}_i d_j for the second and third generation quarks in the minimal supersymmetric standard model. As part of the analysis, we derive some general analytical formulas for the imaginary parts of two-point and three-point scalar one-loop integrals and use them for calculating vectorial and tensorial type integrals needed for the problem under consideration. We find that, even though each decay mode has a potential to yield a CP asymmetry larger than 10%, further analysis based on the number of required charged Higgs events at colliders favors the \bar{t}b, \bar{c}b, and \bar{c}s channels, whose asymmetry could reach 10-15% in certain parts of the parameter space.
description: 25 pages, 9 figures. Discussion about charged Higgs observability added, typos corrected, accepted for publication in PRD
A Statistical Description of AGN Jet Evolution from the VLBA Imaging and Polarimetry Survey (VIPS)
Creators: name: Helmboldt, J. F.
name: Taylor, G. B.
name: Walker, R. C.
name: Blanford, R. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A detailed analysis of the evolution of the properties of core-jet systems within the VLBA Imaging and Polarimetry Survey (VIPS) is presented. We find a power-law relationship between jet intensity and width that suggests for the typical jet, little if any energy is lost as it moves away from its core. Using VLA images at 1.5 GHz, we have found evidence that parsec-scale jets tend to be aligned with the the direction of emission on kiloparsec scales. We also found that this alignment improves as the jets move farther from their cores on projected scales as small as ~50-100 pc. This suggests that realignment of jets on these projected scales is relatively common. We typically find a modest amount of bending (a change in jet position angle of ~5 deg.) on these scales, suggesting that this realignment may typically occur relatively gradually.
description: Accepted to ApJ, 20 pages, 8 figures
Faster imaging simulation through complex systems: a coronagraphic example
Creators: name: Milani, Kian
name: Douglas, Ewan S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: End-to-end simulation of the influence of the optical train on the observed scene is important across optics and is particularly important for predicting the science yield of astronomical telescopes. As a consequence of their goal of suppressing starlight, coronagraphic instruments for high-contrast imaging have particularly complex field-dependent point-spread-functions (PSFs). The Roman Coronagraph Instrument (CGI), Hybrid Lyot Coronagraph (HLC) is one example. The purpose of the HLC is to image exoplanets and exozodiacal dust in order to understand dynamics of solar systems. This paper details how images of exoplanets and exozodiacal dust are simulated using some of the most recent PSFs generated for the CGI HLC imaging mode. First, PSFs are generated using physical optics propagation techniques. Then, the angular offset of pixels in image scenes, such as exozodiacal dust models, are used to create a library of interpolated PSFs using interpolation and rotation techniques, such that the interpolated PSFs correspond to angular offsets of the pixels. This means interpolation needs only be done once and an image can then be simulated by multiplying the vector array of the model astrophysical scene by the matrix array of the interpolated PSF data. This substantially reduces the time required to generate image simulations by reducing the process to matrix multiplication, allowing for faster scene analysis. We will detail the steps required to generate coronagraphic scenes, quantify the speed-up of our matrix approach versus other implementations, and provide example code for users who wish to simulate their own scenes using publicly available HLC PSFs.
description: 14 pages, 16 figures, Event: SPIE Optical Engineering + Applications, 20 August 2020
X-Ray Emission from the Warm Hot Intergalactic Medium
Creators: name: Ursino, E.
name: Galeazzi, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The number of detected baryons in the Universe at z<0.5 is much smaller than predicted by standard big bang nucleosynthesis and by the detailed observation of the Lyman alpha forest at red-shift z=2. Hydrodynamical simulations indicate that a large fraction of the baryons today is expected to be in a ``warm-hot'' (10^5-10^7K) filamentary gas, distributed in the intergalactic medium. This gas, if it exists, should be observable only in the soft X-ray and UV bands. Using the predictions of a particular hydrodynamic model, we simulated the expected X-ray flux as a function of energy in the 0.1-2 keV band due to the Warm-Hot Intergalactic Medium (WHIM), and compared it with the flux from local and high red-shift diffuse components. Our results show that as much as 20% of the total diffuse X-ray background (DXB) in the energy range 0.37-0.925keV could be due to X-ray flux from the WHIM, 70% of which comes from filaments at redshift z between 0.1 and 0.6. Simulations done using a FOV of 3', comparable with that of Suzaku and Constellation-X, show that in more than 20% of the observations we expect the WHIM flux to contribute to more than 20% of the DXB. These simulations also show that in about 10% of all the observations a single bright filament in the FOV accounts, alone, for more than 20% of the DXB flux. Red-shifted oxygen lines should be clearly visible in these observations.
description: 19 pages, 6 figures
Additional file 1 of Feasibility of performance-based and self-reported outcomes in self-managed falls prevention exercise interventions for independent older adults living in the community
Creators: name: Mansson, Linda
name: Pettersson, Beatrice
name: Rosendahl, Erik
name: Skelton, Dawn A.
name: Lundin-Olsson, Lillemor
name: Sandlund, Marlene
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Supplementary Table (S1). Template for Intervention Description and Replication (TIDieR) checklist for Safe Step feasibility study.
Deconstructing Frame Dragging
Creators: name: Herrera, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The vorticity of world lines of observers associated to the rotation of a massive body was reported by Lense and Thirring more than a century ago. In their example the frame dragging effect induced by the vorticity, is directly (explicitly) related to the rotation of the source. However in many other cases it is not so, and the origin of vorticity remains obscure and difficult to identify. Accordingly, in order to unravel this issue, and looking for the ultimate origin of vorticity associated to frame dragging, we analyze in this manuscript very different scenarios where frame dragging effect is present. Specifically we consider general vacuum stationary spacetimes, general electro-vacuum spacetimes, radiating electro-vacuum spacetimes and Bondi--Sachs radiating spacetimes. We identify the physical quantities present in all these cases, which determine the vorticity and may legitimately be considered as responsible for the frame dragging. Doing so we provide a comprehensive physical picture of frame dragging. Some observational consequences of our results are discussed.
description: 14 pages Revtex. Published in Universe (Special issue: Frame-Dragging and Gravitomagnetism)
linGrow: Development of a multilingual app to support home-school communication of multilingual families
Creators: name: Demers, Catrine; Lakhdhir, Sabrina; Kaushik, Skanda; Gimeno, Zhanika; Munjal, Drishti; Yang, Lucy; Tormon, Rigel; Ebose, Whitney; MacLeod, Andrea A.N.
Publisher: name: University of Alberta Libraries
Year: 2021

Abstract
Galaxy Evolution from Halo Occupation Distribution Modeling of DEEP2 and SDSS Galaxy Clustering
Creators: name: Zheng, Zheng
name: Coil, Alison L.
name: Zehavi, Idit
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We model the luminosity-dependent projected two-point correlation function of DEEP2 (z~1) and SDSS (z~0) galaxies within the Halo Occupation Distribution (HOD) framework. At both epochs, there is a tight correlation between central galaxy luminosity and halo mass, with the slope and scatter decreasing for larger halo masses, and the fraction of satellite galaxies decreasing at higher luminosity. Central L* galaxies reside in halos a few times more massive at z~1 than at z~0. We find little evolution in the relation between mass scales of host halos for central galaxies and satellite galaxies above the same luminosity threshold. Combining these HOD results with theoretical predictions of the typical growth of halos, we establish an evolutionary connection between the galaxy populations at the two redshifts by linking z~0 central galaxies to z~1 central galaxies that reside in their progenitor halos, which enables us to study the evolution of galaxies as a function of halo mass. We find that the stellar mass growth of galaxies depends on halo mass. On average, the majority of the stellar mass in central galaxies residing in z~0 low mass halos (~5x10^11 Msun/h) and only a small fraction of the stellar mass in central galaxies of high mass halos (~10^13 Msun/h) result from star formation between z~1 and z~0. In addition, the mass scale of halos where the star formation efficiency reaches a maximum is found to shift toward lower mass with time. Future work can combine HOD modeling of the clustering of galaxies at different redshifts with the assembly history and dynamical evolution of dark matter halos. This can lead to an understanding of the stellar mass growth due to both mergers and star formation as a function of host halo mass and provide powerful tests of galaxy formation theories. (Abridged).
description: 22 pages, 11 figures, minor changes to match the published version
A Special Issue on Statistical Challenges and Opportunities in Electronic Commerce Research
Creators: name: Jank, Wolfgang
name: Shmueli, Galit
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: This special issue is a product of the First Interdisciplinary Symposium on Statistical Challenges and Opportunities in Electronic Commerce Research, which took place on May 22--23, 2005, at the Robert H. Smith School of Business, University of Maryland, College Park (\url{www.smith.umd.edu/dit/statschallenges/}). The symposium brought together, for the first time, researchers from statistics, information systems, and related fields, all of whom work or are interested in empirical research related to electronic commerce. The goal of the symposium was to cross the borders, discuss joint research opportunities, expose this field and its statistical challenges, and promote collaboration between the different fields.
description: Published at http://dx.doi.org/10.1214/088342306000000178 in the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The Lyman alpha morphology of local starburst galaxies: release of calibrated images
Creators: name: Ostlin, Goran
name: Hayes, Matthew
name: Kunth, Daniel
name: Mas-Hesse, J. Miguel
name: Leitherer, Claus
name: Petrosian, Artashes
name: Atek, Hakim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present reduced and calibrated high resolution Lyman-alpha (Lya) images for a sample of 6 local star forming galaxies. Targets were selected to represent a range in luminosity and metallicity and to include both known Lya emitters and non-emitters. Far ultraviolet imaging was carried out with the Solar Blind Channel of the ACS on HST in the F122M (Lya on-line) and F140LP (continuum) filters. The resulting Lya images are the product of careful modeling of both the stellar and nebular continua, facilitated by supporting HST imaging in Ha and 5 continuum bands, combined with Starburst99 evolutionary synthesis models, and prescriptions for dust extinction on the continuum. In all, the resulting morphologies in Lya, Ha, and UV-continuum are qualitatively very different and we show that the bulk of Lya emerges in a diffuse component resulting from resonant scattering events. Lya escape fractions, computed from integrated Ha luminosities and recombination theory, are found never to exceed 14%. Internal dust extinction is estimated in each pixel and used to correct Lya fluxes. However, the extinction corrections are far too small (factors from 2.6 to infinity) to reconcile the global Lya luminosities with recombination theory. Surprisingly, when comparing the global equivalent widths of Lya and Ha, the two quantities appear anti-correlated, which may be due to the evolution of mechanical feedback. This calls for caution in the interpretation of Lya observations. The images presented have a physical resolution 3 orders of magnitude better than attainable at high-z from the ground with current instrumentation and our images may therefore serve as useful templates for comparing with observations and modeling of primeval galaxy formation. We therefore provide the reduced Lya, Ha, and continuum images to the community.
description: Accepted by the Astronomical Journal. See also http://ttt.astro.su.se/projects/Lyman-alpha/