cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Correlations in entanglement-assisted prepare-and-measure scenarios
Creators: name: Tavakoli, Armin
name: Pauwels, Jef
name: Woodhead, Erik
name: Pironio, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the correlations that can arise between Alice and Bob in prepare-and-measure communication scenarios where the source (Alice) and the measurement device (Bob) can share prior entanglement. The paradigmatic example of such a scenario is the quantum dense coding protocol, where the communication capacity of a qudit can be doubled if a two-qudit entangled state is shared between Alice and Bob. We provide examples of correlations that actually require more general protocols based on higher-dimensional entangled states. This motivates us to investigate the set of correlations that can be obtained from communicating either a classical or a quantum $d$-dimensional system in the presence of an unlimited amount of entanglement. We show how such correlations can be characterized by a hierarchy of semidefinite programming relaxations by reducing the problem to a non-commutative polynomial optimization problem. We also introduce an alternative relaxation hierarchy based on the notion of informationally-restricted quantum correlations, which, though it represents a strict (non-converging) relaxation scheme, is less computationally demanding. As an application, we introduce device-independent tests of the dimension of classical and quantum systems that, in contrast to previous results, do not make the implicit assumption that Alice and Bob share no entanglement. We also establish several relations between communication with and without entanglement as resources for creating correlations.
description: 14 pages, 2 figures
Discontinuous Meniscus Location in Tapered Capillaries Driven by Pressure Difference and Dielectrophoretic Forces
Creators: name: Tsori, Yoav
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We calculate the meniscus location in tapered capillaries under the influence of pressure difference and dielectrophoretic forces with and without gravity. We find that the meniscus location can be a discontinuous function of the pressure difference or the applied voltage and that the meniscus can ``jump'' to one end or another of the capillary. Phase diagrams are given as a function of the pressure and voltage, depending on the geometrical parameters of the system. We further consider a revision of the dielectric rise under dielectrophoretic force in wedge capillaries and in the case of electrowetting, where the dielectrophoretic force is a small perturbation. Finally, we also find discontinuous liquid--gas interface location in the case of liquid penetration into closed volumes.
description: 8 pages, 8 figures
Additional file 1: of Tspan8 and Tspan8/CD151 knockout mice unravel the contribution of tumor and host exosomes to tumor progression
Creators: name: Zhao, Kun
name: Wang, Zhe
name: Hackert, Thilo
name: Pitzer, Claudia
name: Zรถller, Margot
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology
subject: Plant Biology

description: Table S1. Primers. Table S2. Reagents. Figure S1. Characterization of MCA tumors, bone marrow cells and endothelial cells from Tspan8ko- and/or CD151ko-mice. Figure S2. Tspan8- and CD151-dependence of TEX and sExo delivery and uptake. Figure S3. Ex vivo analysis of tetraspanin, adhesion molecule and angiogenic factor expression in MCA tumors. Figure S4. TEX and apoptosis resistance of wt- and ko-MCA tumor cells. Figure S5. The impact of TEX on EMT. Figure S6. TEX proteases and invasion of Tspan8ko and/or CD151ko MCA cells. Figure S7 Flow-cytometry examples on the impact of sExo and TEX uptake on BMC subpopulations. (PDF 4883 kb)
Theoretical model for ultracold molecule formation via adaptive feedback control
Creators: name: Poschinger, Ulrich
name: Salzmann, Wenzel
name: Wester, Roland
name: Weidemueller, Matthias
name: Koch, Christiane P.
name: Kosloff, Ronnie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate pump-dump photoassociation of ultracold molecules with amplitude- and phase-modulated femtosecond laser pulses. For this purpose a perturbative model for the light-matter interaction is developed and combined with a genetic algorithm for adaptive feedback control of the laser pulse shapes. The model is applied to the formation of 85Rb2 molecules in a magneto-optical trap. We find for optimized pulse shapes an improvement for the formation of ground state molecules by more than a factor of 10 compared to unshaped pulses at the same pump-dump delay time, and by 40% compared to unshaped pulses at the respective optimal pump-dump delay time. Since our model yields directly the spectral amplitudes and phases of the optimized pulses, the results are directly applicable in pulse shaping experiments.
Superconductivity with High Upper Critical Field in the Cubic Centrosymmetric $η$-Carbide Nb$_4$Rh$_2$C$_{1-δ}$
Creators: name: Ma, KeYuan
name: Gornicka, Karolina
name: Lefevre, Robin
name: Yang, Yikai
name: Roennow, Henrik M.
name: Jeschke, Harald O.
name: Klimczuk, Tomasz
name: von Rohr, Fabian O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The upper critical field is a fundamental measure of the strength of superconductivity in a material. It is also a cornerstone for the realization of superconducting magnet applications. The critical field arises because of the Copper pair breaking at a limiting field, which is due to the Pauli paramagnetism of the electrons. The maximal possible magnetic field strength for this effect is commonly known as the Pauli paramagnetic limit given as $μ_0 H_{\rm Pauli} \approx 1.86{\rm [T/K]} \cdot T_{\rm c}$ for a weak-coupling BCS superconductor. The violation of this limit is only rarely observed. Exceptions include some low-temperature heavy fermion and some strongly anisotropic superconductors. Here, we report on the superconductivity at 9.75 K in the centrosymmetric, cubic $η$-carbide-type compound Nb$_4$Rh$_2$C$_{1-δ}$, with a normalized specific heat jump of $ΔC/γT_{\rm c} =$ 1.64. We find that this material has a remarkably high upper critical field of $μ_0 H_{\rm c2}{\rm (0)}$ =~28.5~T, which is exceeding by far its weak-coupling BCS Pauli paramagnetic limit of $μ_0 H_{\rm Pauli}$~=~18.1 T. Determination of the origin and consequences of this effect will represent a significant new direction in the study of critical fields in superconductors.
Advancing biological super-resolution microscopy through deep learning: a brief review
Creators: name: Yang, Tianjie
name: Luo, Yaoru
name: Ji, Wei
name: Yang, Ge
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Super-resolution microscopy overcomes the diffraction limit of conventional light microscopy in spatial resolution. By providing novel spatial or spatio-temporal information on biological processes at nanometer resolution with molecular specificity, it plays an increasingly important role in life sciences. However, its technical limitations require trade-offs to balance its spatial resolution, temporal resolution, and light exposure of samples. Recently, deep learning has achieved breakthrough performance in many image processing and computer vision tasks. It has also shown great promise in pushing the performance envelope of super-resolution microscopy. In this brief Review, we survey recent advances in using deep learning to enhance performance of super-resolution microscopy. We focus primarily on how deep learning ad-vances reconstruction of super-resolution images. Related key technical challenges are discussed. Despite the challenges, deep learning is set to play an indispensable and transformative role in the development of super-resolution microscopy. We conclude with an outlook on how deep learning could shape the future of this new generation of light microscopy technology.
Scalar Gravitational Wave Signals from Core Collapse in Massive Scalar-Tensor Gravity with Triple-Scalar Interactions
Creators: name: Huang, Da
name: Geng, Chao-Qiang
name: Kuan, Hao-Jui
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The spontaneous scalarization during the stellar core collapse in the massive scalar-tensor theories of gravity introduces extra polarizations (on top of the plus and cross modes) in gravitational waves, whose amplitudes are determined by several model parameters. Observations of such scalarization-induced gravitational waveforms therefore offer valuable probes into these theories of gravity. Considering a triple-scalar interactions in such theories, we find that the self-coupling effects suppress the magnitude of the scalarization and thus reduce the amplitude of the associated gravitational wave signals. In addition, the self-interacting effects in the gravitational waveform are shown to be negligible due to the dispersion throughout the astrophysically distant propagation. As a consequence, the gravitational waves observed on the Earth feature the characteristic inverse-chirp pattern. Although not with the on-going ground-based detectors, we illustrate that the scalarization-induced gravitational waves may be detectable at a signal-to-noise ratio level of ${\cal O}(100)$ with future detectors, such as Einstein Telescope and Cosmic Explorer.
description: 23 pages, 7 figures
Designing a Mobile High-Fidelity AR Prototype Application for the Enhancement of the Art Gallery Experience: Perceptions and Evaluations
Creators: name: Χατζηστρατή, Βασιλική Θεοδώρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ψηφιακό Μάρκετινγκ
Πρότυπα Εφαρμογών
Πολιτισμικοί Οργανισμοί
Digital Marketing
Application Prototyping
Cultural Organizations

description: The dissertation has been written with the purpose of fulfilling the requirements for the degree of Master in Digital Media, Communication and Journalism. Its main purpose has been to explore the potential of Augmented Reality practices within the museum space as part of the organization’s marketing strategy, with the direction of enhancing the audience visiting experience. In order that the issue is explored in depth, a case study has been designed, presented and analyzed. The author has proposed the creation of a high-fidelity AR application prototype, namely “MyARt Guru”, in collaboration with the Art Gallery of Hamburg; the Hamburger Kunsthalle. The design of the prototype has allowed for the examination of users’ evaluations and perceptions on art, the museum visiting experience, and the implementation of digital practices in the sphere of cultural creation.
description: Η διατριβή συγγράφηκε με σκοπό την εκπλήρωση των απαιτήσεων του Μεταπτυχιακού τίτλου στα Ψηφιακά Μέσα, Επικοινωνία και Δημοσιογραφία. Κύριος στόχος της υπήρξε να διερευνήσει την δυνατότητα πρακτικών Επαυξημένης Πραγματικότητας εντός του μουσειακού χώρου, ως κομμάτι της στρατηγικής μάρκετινγκ οργανισμών. Με σκοπό την διερεύνηση του θέματος σε βάθος, σχεδιάστηκε, παρουσιάστηκε και αναλύθηκε μία μελέτη περίπτωσης. Η συγγραφέας πρότεινε την δημιουργία ενός πρότυπου εφαρμογής επαυξημένης πραγματικότητας υψηλής πιστότητας, επονομαζόμενο «MyARt Guru», σε συνεργασία με την Γκαλερί Τέχνης του Αμβούργου, «Hamburger Kunsthalle». Ο σχεδιασμός του προτότυπου επέτρεψε την εξέταση των αξιολογήσεων αλλά και αντιλήψεων χρηστών σχετικά με την τέχνη, καθώς και την εφαρμογή ψηφιακών πρακτικών στην σφαίρα της πολιτισμικής δημιουργίας.
Extending the scalars of minimizations
Creators: name: Duchamp, Gérard
name: Laugerotte, Eric
name: Luque, Jean-Gabriel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Data Structures and Algorithms (cs.DS)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In the classical theory of formal languages, finite state automata allow to recognize the words of a rational subset of $Σ^*$ where $Σ$ is a set of symbols (or the alphabet). Now, given a semiring $(\K,+,.)$, one can construct $\K$-subsets of $Σ^*$ in the sense of Eilenberg, that are alternatively called noncommutative formal power series for which a framework very similar to language theory has been constructed Particular noncommutative formal power series, which are called rational series, are the behaviour of a family of weighted automata (or $\K$-automata). In order to get an efficient encoding, it may be interesting to point out one of them with the smallest number of states. Minimization processes of $\K$-automata already exist for $\K$ being: {\bf a)} a field, {\bf b)} a noncommutative field, {\bf c)} a PID . When $\K$ is the bolean semiring, such a minimization process (with isomorphisms of minimal objects) is known within the category of deterministic automata. Minimal automata have been proved to be isomorphic in cases {\bf (a)} and {\bf (b)}. But the proof given for (b) is not constructive. In fact, it lays on the existence of a basis for a submodule of $\K^n$. Here we give an independent algorithm which reproves this fact and an example of a pair of nonisomorphic minimal automata. Moreover, we examine the possibility of extending {\bf (c)}. To this end, we provide an {\em Effective Minimization Process} (or {\em EMP}) which can be used for more general sets of coefficients.
Training undergraduate students in interprofessional shared decision-making in palliative care: Exploring changes in perceptions and performance
Creators: name: Sultan, Lama
name: De Jong, Nynke
name: Alsaywid, Basim
name: Khan, Muhammad Anwar
name: Althubaiti, Sami
name: De Nooijer, Jascha
Publisher: name: F1000 Research Limited
Year: 2024

description: We explored an authentic learning experience to practice Interprofessional Shared Decision-Making (IP-SDM) in palliative care among undergraduate students who attended a workshop and used a combination of their own assessment and assessment by evaluators in a Team Objective Structured Clinical Examination (TOSCE) setting.The results demonstrated a positive short-term impact of participating in the workshop on improving skills related to IP-SDM in the context of palliative care.
Japanese manufacturing greenfields : the provincial location decision
Creators: name: Brown, Iain A.
Publisher: name: University of British Columbia
Year: 2008

description: This paper examines why Japanese manufacturing greenfields locate in a particular Canadian province. We find that the location preference is based primarily on the present distribution of Japanese and Canadian firms. A secondary factor is market access, which includes the transportation costs of exporting the Canadian manufactured product to Japan. Other important factors are energy and labour costs. Having utilized quantitative methods to determine that the presence of Japanese and Canadian firms are the main reasons why new greenfields select the province they will locate in, we question the value of using tax dollars to attract investments to locations lacking substantial industry activity.
SN 2017hpa: A carbon-rich type Ia supernova
Creators: name: Dutta, Anirban
name: Singh, Avinash
name: Anupama, G. C.
name: Sahu, D. K.
name: Kumar, Brajesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the optical (UBVRI) and ultraviolet (Swift-UVOT) photometry, and optical spectroscopy of Type Ia supernova SN 2017hpa. We study broadband UV+optical light curves and low resolution spectroscopy spanning from $-13.8$ to $+108$~d from the maximum light in $B$-band. The photometric analysis indicates that SN 2017hpa is a normal type Ia with $Δm_{B}(15) = 0.98\pm0.16$ mag and $M_{B}=-19.45\pm0.15$ mag at a distance modulus of $μ= 34.08\pm0.09$ mag. The $(uvw1-uvv)$ colour evolution shows that SN 2017hpa falls in the NUV-blue group. The $(B-V)$ colour at maximum is bluer in comparison to normal type Ia supernovae. Spectroscopic analysis shows that the Si II 6355 absorption feature evolves rapidly with a velocity gradient, $\dot{v}=128\pm 7$ km s$^{-1}$ d$^{-1}$. The pre-maximum phase spectra show prominent C II 6580 Å absorption feature. The C II 6580 Å line velocity measured from the observed spectra is lower than the velocity of Si II 6355 Å, which could be due to a line of sight effect. The synthetic spectral fits to the pre-maximum spectra using syn++ indicate the presence of a high velocity component in the Si II absorption, in addition to a photospheric component. Fitting the observed spectrum with the spectral synthesis code TARDIS, the mass of unburned C in the ejecta is estimated to be $\sim 0.019$~$M_{\odot}$. The peak bolometric luminosity is $L^{bol}_{peak} = 1.43\times10^{43}$ erg s$^{-1}$. The radiation diffusion model fit to the bolometric light curve indicates $0.61\pm0.02$ $M_\odot$ of $^{56}$Ni is synthesized in the explosion.
description: 15 pages, 13 figures, Accepted for publication in MNRAS
Η έννοια του χώρου και της μετατροπής του σκοπού χρήσης υλικών και τεχνολογίας στον Νευρομάντη και το Εικονικό Φως του Γουίλλιαμ Γκίμπσον
Creators: name: Ηλιόπουλος, Γρηγόριος Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Γουίλλιαμ Γκίμπσον
Κυβερνοχώρος
Χρήση του χώρου
William Gibson
Cyberspace
Utilization of space

description: Σκοπός της μεταπτυχιακής εργασίας αυτής ήταν η εξερεύνηση της έννοιας του χώρου στα έργα <> και <> του Γουίλλιαμ Γκίμπσον και η σχέση του χώρου με την μετατροπή χρήσης υλικών και τεχνολογίας. Αρχικά αναλύονται και τα δύο έργα όσο αφορά τον χώρο και την μετατροπή της χρήσης υλικών σε ξεχωριστά κεφάλαια. Μέσα από την διπλωματική αυτή εργασία υπογραμμίζεται η σημασία των περιθωριακών χώρων, πραγματικών ή εικονικών, ως χώροι ανομίας και έλλειψης ελέγχου από οποιαδήποτε μορφή κεντρικής εξουσίας, γεγονός που επιτρέπει την ελεύθερη τροποποίηση τεχνολογικών προϊόντων από την κατώτερη αστική τάξη ανάλογα με τις ανάγκες της. Ακόμη γίνεται ειδική αναφορά στην σημασία της όρασης ως μέσο αντίληψης του περιβάλλοντα χώρου. Τέλος η αισθητική του κυβερνοπάνκ και ο κυβερνοχώρος αναλύονται και εντοπίζονται οι νέες προσεγγίσεις που έφεραν στην αντίληψη του χώρου ως έννοια αλλά και στον συνδυασμό ετερόκλητων στοιχείων μέσα σε αστικές κοινωνίες.
description: The aim of this postgraduate thesis was to explore space and its relation to the re-purposing of materials and technology in William Gibson’s Neuromancer and Virtual Light. Both works are analyzed, as space and re-purposing is concerned, in separate chapters. The importance of marginal spaces, physical or virtual, is underlined since they provide unregulated and lawless spaces that are devoid of any sort of control from a central authority. This fact enables the limitless re-purposing of technological products by the urban underclass according to its needs. Furthermore, the importance of the visual element is highlighted when it comes to the definition of the surrounding space. Finally, cyberpunk aesthetics and cyberspace are touched upon along with the new approaches that they brought in the way in which we understand space and the combination of diverse elements in urban environments.
Student-centered unique learning activities in undergraduate ultrasound education
Creators: name: Tsuge, Shogo
name: Hosokawa, Taiki
name: Sanshiro Togo
name: Toda, Naoto
name: Ohba, Kenji
name: Kataoka, Hiromitsu
Publisher: name: F1000 Research Limited
Year: 2024

description: Background: The acquisition of ultrasound skills is vital for medical students, but they often encounter limited opportunities due to shortages of trained faculty and resources.

Summary of Work: Established in 2021 by six third-year medical students and a certified echo cardiologist, Hamamatsu ER Ultrasound (HERUS) focuses on ultrasound education. This study retrospectively reviews HERUS's unique educational activities and their outcomes.

Summary of Results: Our activities, identified through member reflections, were categorized into three main areas. The first, a weekly peer-assisted learning (PAL) session, involved HERUS members guiding their peers in practical ultrasound skills. The second, anatomical training with pork hearts, provided hands-on experience in cardiology. The third initiative entailed wearing custom-designed scrubs with ultrasound probe illustrations to enhance the learning atmosphere during clinical clerkships. This approach influenced faculty engagement, leading to more frequent teaching and contributions of ultrasound equipment. Initially, the society lacked its own equipment, relying on borrowed resources. By the end of 2023, HERUS grew to 40 members and acquired various ultrasound devices, including four console-type and 16 handheld devices. Since 2021, HERUS has also provided learning opportunities for more than 100 students.

Discussion and Conclusion: The PAL approach, increasingly popular in healthcare education, allows peers to act as simulated patients, offsetting the need for expensive phantoms. Integrating anatomical training with PAL sessions has synergistically improved both anatomical knowledge and ultrasound skills. Regarding the third activity, it has been reported that medical students’ attire can impact patients, highlighting the potential significance of student clothing. Our initiative suggests that even aspects like student attire can significantly influence teaching dynamics and learning environments. In conclusion, we showcased the three representative learning activities implemented by our initiative and its growth.

Take-home Message: The HERUS model exemplifies student-centered ultrasound education and demonstrates the value of novel learning activities in enhancing both student engagement and educational resources. This study highlights the benefits of innovative, student-led initiatives in ultrasound education.



Acknowledgement: The authors would like to thank Mr. Shinnosuke Akeda, Mr. Noriaki Shimamoto, Dr. Takeji Saitoh, Prof. Hiroshi Igarashi, and Prof. Kazuo Umemura for their support. The authors also thank all healthcare professionals and students who supported our activities.
Additional file 3 of Comprehensive analysis of the MYB transcription factor gene family in Morus alba
Creators: name: Liu, Li
name: Chao, Nan
name: Yidilisi, Keermula
name: Kang, Xiaoru
name: Cao, Xu
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: Fig. S1. Phylogenetic tree of R2R3-MYBs from Arabidopsis, Populus, and Morus. The subgroups are indicated based on both the classification in Arabidopsis and Populus.
Τεχνικές εξόρυξης στοιχείων και κειμένου σε ετήσιες οικονομικές εκθέσεις επιχειρήσεων: Η περίπτωση των ταμειακών ροών
Creators: name: Παπαδοπούλου, Ιωάννα Μελετίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Εξόρυξη
Παλινδρόμηση
Οικονομικές εκθέσεις
Mining
Regression
Financial statements

description: Τα τελευταία χρόνια αναγνωρίζεται έντονα η αναγκαιότητα μελέτης των ταμειακών ροών στα πλαίσια διαχείρισης της δράσης των επιχειρήσεων. Αυτή ήταν η κινητήρια δύναμη εκπόνησης της παρούσας εργασίας. Μελετώνται οι οικονομικές καταστάσεις των επιχειρήσεων και με τεχνικές εξόρυξης στοιχείων, δημιουργείται ένα προγνωστικό μοντέλο το οποίο αποτυπώνει την θέση των Ταμειακών ροών από λειτουργικές δραστηριότητες ως προς την Απόδοση στα Κέρδη, την Απόδοση στα Ίδια Κεφάλαια, την Γενική Ρευστότητα και την Ειδική Ρευστότητα των επιχειρήσεων, οι οποίες είναι εισηγμένες στο Χρηματιστήριο Αθηνών για το έτος 2018. Η δημιουργία προγνωστικού μοντέλου γίνεται με την χρήση πολλαπλής γραμμικής παλινδρόμησης στο πρόγραμμα IBM SPSS. Παράλληλα γίνεται εξόρυξη στοιχείων με την χρήση του ελεύθερου λογισμικού πακέτου KNIME. Τα στοιχεία τα οποία εξάγονται, μετά την προεπεξεργασία κειμένου σύμφωνα με τα επιθυμητά αποτελέσματα, κινούνται γύρω από εκφράσεις «κλειδιά», τα Ngrams, τα οποία αφορούν τις Ταμειακές ροές από λειτουργικές δραστηριότητες. Από την τελική λίστα που παρουσιάζεται μελετώνται οι εκφράσεις με την μεγαλύτερη συχνότητα εμφάνισης στις Οικονομικές εκθέσεις. Έτσι δημιουργείται ένα καθολικό φάσμα μελέτης στοιχείων αλλά και κειμένου ως προς τις Ταμειακές Ροές από λειτουργικές δραστηριότητες.
description: In the recent years, has been strongly recognized the necessity of studying Cash flows statements in order to develop business management operations. This was the driving force behind this thesis. The final prognostic model originates from the financial statements data mining techniques, which captures the position of Cash Flows from operating activities in terms of Return on Assets (ROA), Return on Equity (ROE), General Liquidity and Special Liquidity. Companies which are listed are members of Athens Stock Exchange Market, for the year 2018. The creation of the prognostic model is done by using multiple linear regression in the IBM SPSS software program. In parallel, data is extracted using the free KNIME software package. Final data that is extracted, after the pre-processing of the text according to the desired results, moves around "key" expressions, the Ngrams, which refer to the Cash Flows from operating activities. From the final list presented of keywords, the expressions which are examined, are those with the highest frequency of occurrence in the Financial reports. This creates a holistic spectrum of data and text mining, in regards to Cash Flows from operating activities.
Global analysis of solar neutrinos (assumed to be Majorana particles) together with the new KamLAND data
Creators: name: Yilmaz, D
name: Yilmazer, A U
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Assuming neutrinos are Majorana particles having non-zero transition magnetic moments, a global analysis of solar neutrino data, together with the new KamLAND data, is presented in the resonant spin flavor precession (RSFP) framework. The allowed regions from solar data combined with new KamLAND data are examined at 0.95 confidence level (CL). The electron antineutrino flux from the Sun is calculated, and via the results obtained several limits are set for muB.
description: 13 pages, 6 figures
Additional file 1 of Effects of a postural cueing for head and neck posture on lumbar lordosis angles in healthy young and older adults: a preliminary study
Creators: name: Zhai, Meiling
name: Huang, Yongchao
name: Zhou, Shi
name: Feng, Jiayun
name: Pei, Chaolei
name: Wen, Li
Publisher: name: figshare
Year: 2022
Subjects: subject: Biophysics
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Additional file 1. Posture and muscle tension.
title: Pride and Dorchester: Partner Report for Dorchester Town Council
Creators: name: Owen, Joseph
name: Marsh, Nicky
name: Jones, Stephanie
Publisher: name: University of Southampton
Year: 2023

description: The Feeling Towns project, in collaboration with officers at Dorchester Town Council, explored the meaning and value of pride, culture, heritage and the environment in Dorchester. Research was undertaken between February and June 2023, when local government and stakeholders sought to understand different strategic visions for the town and its resident communities. We undertook fieldwork, speaking with approximately 300 people using a variety of research methods, including interviews, fieldwork and facilitated creative workshops. We also undertook desk-based research, placing Dorchesterâs cultural, heritage and digital strategy within a wider comparative context.
Prediction of missing observations by a control method
Creators: name: Abramov, Vyacheslav M.
name: Klebaner, Fima C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M10; 62M20

description: Consider a time series with missing observations but a known final point. Using control theory ideas we estimate/predict these missing observations. We obtain recurrence equations which minimize sum of squares of a control sequence. An advantage of this method is in easily computable formulae and flexibility of its application to different structures of missing data.
description: revised and resubmitted
The Photoevaporation of Discs Around Young Stars in Massive Clusters
Creators: name: Clarke, C. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present models in which the photoevaporation of discs around young stars by an external ultraviolet source (as computed by Adams et al 2004) is coupled with the internal viscous evolution of the discs. These models are applied to the case of the Orion Nebula Cluster, where the presence of a strong ultraviolet field from the central OB stars, together with a detailed census of circumstellar discs and photoevaporative flows, is well established. In particular we investigate the constraints that are placed on the initial disc properties in the ONC by the twin requirement that most stars possess a disc on a scale of a few A.U., but that only a minority ($< 20 %$) are resolved by HST at a scale of 50 A.U.. We find that these requirements place very weak constraints on the initial radius distribution of circumstellar discs: the resulting size distribution readily forgets the initial radius distribution, owing to the strong positive dependence of the photoevaporation rate on disc radius. Instead, the scarcity of large discs reflects the relative scarcity of initially massive discs (with mass $> 0.1 M_\odot$). The ubiquity of discs on a small scale, on the other hand, mainly constrains the timespan over which the discs have been exposed to the ultraviolet field ($< 2 $Myr). We argue that the discs that are resolved by HST represent a population of discs in which self-gravity was important at the time that the dominant central OB star switched on, but that, according to our models, self-gravity is unlikely to be important in these discs at the present time. We discuss the implications of our results for the so-called proplyd lifetime problem.
description: 8 pages, 5 figures, MNRAS accepted
The Rediscovery Hypothesis: Language Models Need to Meet Linguistics
Creators: name: Nikoulina, Vassilina
name: Tezekbayev, Maxat
name: Kozhakhmet, Nuradil
name: Babazhanova, Madina
name: Gallé, Matthias
name: Assylbekov, Zhenisbek
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: There is an ongoing debate in the NLP community whether modern language models contain linguistic knowledge, recovered through so-called probes. In this paper, we study whether linguistic knowledge is a necessary condition for the good performance of modern language models, which we call the \textit{rediscovery hypothesis}. In the first place, we show that language models that are significantly compressed but perform well on their pretraining objectives retain good scores when probed for linguistic structures. This result supports the rediscovery hypothesis and leads to the second contribution of our paper: an information-theoretic framework that relates language modeling objectives with linguistic information. This framework also provides a metric to measure the impact of linguistic information on the word prediction task. We reinforce our analytical results with various experiments, both on synthetic and on real NLP tasks in English.
Constraining the population of isolated massive stars within the Central Molecular Zone
Creators: name: Clark, J. S.
name: Patrick, L. R.
name: Najarro, F.
name: Evans, C. J.
name: Lohr, M. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Many galaxies host pronounced circumnuclear starbursts, fuelled by infalling gas. Such activity is expected to drive the secular evolution of the nucleus and generate super winds, while the intense radiation fields and extreme gas and cosmic ray densities present may act to modify the outcome of star formation with respect to more quiescent galactic regions. The centre of the Milky Way is the only example of this phenomenon where, by virtue of its proximity, individual stars may be resolved. Previous studies have revealed that it hosts a rich population of massive stars; these are located within three clusters, with an additional contingent dispersed throughout the Central Molecular Zone (CMZ). We employed VLT+KMOS to obtain homogeneous, high S/N spectroscopy of the later cohort for classification and quantitative analysis. Including previously identified examples, we found a total of 83 isolated massive stars within the Galactic Centre, which are biased towards objects supporting powerful stellar winds and/or extensive circumstellar envelopes. No further stellar clusters, or their tidally stripped remnants, were identified, although an apparent stellar overdensity was found to be coincident with the Sgr B1 star forming region. The cohort of isolated massive stars within the CMZ is comparable in size to that of the known clusters but, due to observational biases, is likely highly incomplete at this time. Combining both populations yields over 320 spectroscopically classified stars that are expected to undergo core collapse within the next 20Myr. Given that this is presumably an underestimate of the true number, the population of massive stars associated with the CMZ appears unprecedented amongst star formation complexes within the Milky Way, and one might anticipate that they play a substantial role in the energetics and evolution of the nuclear region.
description: 28 pages, 14 figures, accepted for publication in Astronomy and Astrophysics
Direct and dual laws for automata with multiplicities
Creators: name: Duchamp, Gérard
name: Flouret, Marianne
name: Laugerotte, Eric
name: Luque, Jean-Gabriel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We present here theoretical results coming from the implementation of the package called AMULT (automata with multiplicities in several noncommutative variables). We show that classical formulas are ``almost every time'' optimal, characterize the dual laws preserving rationality and also relators that are compatible with these laws.
ChaLearn Looking at People: Inpainting and Denoising challenges
Creators: name: Escalera, Sergio
name: Soler, Marti
name: Ayache, Stephane
name: Guclu, Umut
name: Wan, Jun
name: Madadi, Meysam
name: Baro, Xavier
name: Escalante, Hugo Jair
name: Guyon, Isabelle
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Dealing with incomplete information is a well studied problem in the context of machine learning and computational intelligence. However, in the context of computer vision, the problem has only been studied in specific scenarios (e.g., certain types of occlusions in specific types of images), although it is common to have incomplete information in visual data. This chapter describes the design of an academic competition focusing on inpainting of images and video sequences that was part of the competition program of WCCI2018 and had a satellite event collocated with ECCV2018. The ChaLearn Looking at People Inpainting Challenge aimed at advancing the state of the art on visual inpainting by promoting the development of methods for recovering missing and occluded information from images and video. Three tracks were proposed in which visual inpainting might be helpful but still challenging: human body pose estimation, text overlays removal and fingerprint denoising. This chapter describes the design of the challenge, which includes the release of three novel datasets, and the description of evaluation metrics, baselines and evaluation protocol. The results of the challenge are analyzed and discussed in detail and conclusions derived from this event are outlined.
Some operator monotone functions
Creators: name: Hansen, Frank
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove that the functions t -> (t^q-1)(t^p-1)^{-1} are operator monotone in the positive half-axis for 0 < p < q < 1, and we calculate the two associated canonical representation formulae. The result is used to find new monotone metrics (quantum Fisher information) on the state space of quantum systems.
description: An author has quit and some material added
Homology Cobordism Invariants and the Cochran-Orr-Teichner Filtration of the Link Concordance Group
Creators: name: Harvey, Shelly L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57M (Primary); 57R (Secondary)

description: For any group G, we define a new characteristic series related to the derived series, that we call the torsion-free derived series of G. Using this series and the Cheeger-Gromov rho-invariant, we obtain new real-valued homology cobordism invariants rho_n for closed (4k-1)-dimensional manifolds. For 3-dimensional manifolds, we show that {rho_n} is a linearly independent set and for each n, the image of rho_n is an infinitely generated and dense subset of R. In their seminal work on knot concordance, T. Cochran, K. Orr, and P. Teichner define a filtration F_(n)^m of the m-component (string) link concordance group, called the (n)-solvable filtration. They also define a grope filtration G_n^m. We show that rho_n vanishes for (n+1)-solvable links. Using this, and the non-triviality of rho_n, we show that for each m>1, the successive quotients of the (n)-solvable filtration of the link concordance group contain an infinitely generated subgroup. We also establish a similar result for the grope filtration. We remark that for knots (m=1), the successive quotients of the (n)-solvable filtration are known to be infinite. However, for knots, it is unknown if these quotients have infinite rank when n>2.
description: 33 pages, 8 figures, typos fixed and other minor changes made
Surface Stress Tensor and Junction Conditions on a Rotating Null Horizon
Creators: name: Beltracchi, Philip
name: Gondolo, Paolo
name: Mottola, Emil
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The general form of the surface stress tensor of an infinitesimally thin shell located on a rotating null horizon is derived, when different interior and exterior geometries are joined there. Although the induced metric on the surface must be the same approached from either side, the first derivatives of the metric need not be. Such discontinuities lead to a Dirac $δ$-distribution in the Einstein tensor localized on the horizon. For a general stationary axisymmetric geometry the surface stress tensor can be expressed in terms of two geometric invariants that characterize the surface, namely the discontinuities $[κ]$ and $[\cal J]$ of the surface gravity $κ$ and angular momentum density $\cal J$. The Komar energy and angular momentum are given in coordinates adapted to the Killing symmetries, and the surface contributions to each determined in terms of $[κ]$ and $[\cal J]$. Guided by these, a simple modification of the original Israel junction conditions is verified directly from the Einstein tensor density to give the correct finite result for the surface stress, when the normal $\boldsymbol n$ to the surface is allowed to tend continuously to a null vector. The relation to Israel's original junction conditions, which fail on null surfaces, is given. The modified junction conditions are suitable to the matching of a rotating `black hole' exterior to any interior geometry joined at the Kerr null horizon surface, even when the surface normal is itself discontinuous and the Barrabès-Israel formalism is also inapplicable. This joining on a rotating null horizon is purely of the matter shell type and does not contain a propagating gravitational shock wave.
description: Replaced with updated version, published at Phys. Rev. D 105, 024001 (2022)
On competing risk and degradation processes
Creators: name: Singpurwalla, Nozer D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62N05, 62M05 (Primary) 60J65 (Secondary)

description: Lehmann's ideas on concepts of dependence have had a profound effect on mathematical theory of reliability. The aim of this paper is two-fold. The first is to show how the notion of a ``hazard potential'' can provide an explanation for the cause of dependence between life-times. The second is to propose a general framework under which two currently discussed issues in reliability and in survival analysis involving interdependent stochastic processes, can be meaningfully addressed via the notion of a hazard potential. The first issue pertains to the failure of an item in a dynamic setting under multiple interdependent risks. The second pertains to assessing an item's life length in the presence of observable surrogates or markers. Here again the setting is dynamic and the role of the marker is akin to that of a leading indicator in multiple time series.
description: Published at http://dx.doi.org/10.1214/074921706000000473 in the IMS Lecture Notes--Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Entanglement and quantum phase transitions in matrix product spin one chains
Creators: name: Alipour, S.
name: Karimipour, V.
name: Memarzadeh, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a one-parameter family of matrix product states of spin one particles on a periodic chain and study in detail the entanglement properties of such a state. In particular we calculate exactly the entanglement of one site with the rest of the chain, and the entanglement of two distant sites with each other and show that the derivative of both these properties diverge when the parameter $g$ of the states passes through a critical point. Such a point can be called a point of quantum phase transition, since at this point, the character of the matrix product state which is the ground state of a Hamiltonian, changes discontinuously. We also study the finite size effects and show how the entanglement depends on the size of the chain. This later part is relevant to the field of quantum computation where the problem of initial state preparation in finite arrays of qubits or qutrits is important. It is also shown that entanglement of two sites have scaling behavior near the critical point.
Locallized Magnetism in Low-Dimensional Systems
Creators: name: Katanin, A. A.
name: Irkhin, V. Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The current theoretical and experimental situation is reviewed for low-dimensional (layered and chain-like) insulating systems. Such systems possess a low magnetic transition temperature $T_M$ and pronounced short-range magnetic order above this temperature. Both the standard and self-consistent spin-wave theories are shown to be insufficient to quantitatively describe the experimental data on these systems. Field-theoretical approaches taking into account the contribution of the spin-fluctuation excitations (neglected in the spin-wave theories) to the thermodynamic properties of ferro- and antiferromagnets are discussed. Analytical expressions for $T_M$ and temperature dependences of long-range order paramenters are obtained, which are in a fair agreement with experimental data.
description: In Russian, 59 p. Book Chapter in: Physics of Magnetic Materials and Nanostructures (Ekaterinburg, 2020), p.456. Extended and updated version of the paper Physics-Uspekhi 50, 613 (2007)
On the electroproduction on nuclei
Creators: name: Fialkowski, K.
name: Wit, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent data on the electroproduction of hadrons on nuclei are discussed. The effects of the nuclear absorption are investigated using the Lund model for electroproduction on nucleons. A simple geometrical model with a minimal number of assumptions and free parameters is shown to describe the data reasonably well.
description: 10 pages, 7 figures; minor corrections, version accepted for publication in European Physical Journal A
Magnetoelectric effect in mixed valency oxides mediated by charge carriers
Creators: name: Stephanovich, V. A.
name: Glinchuk, M. D.
name: Blinc, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We show that the presence of free carriers in a substance can generate the multiferroic behavior. Namely, if the substance has mixed-valence ions, which can supply free carriers and have electric dipole and spin moments, all three types of long-range order (ferromagnetic, ferroelectric and magnetoelectric (ME)) can occur at low temperature. The physical origin of the effect is that charge carriers can mediate the multiferroic behavior via spin - spin (RKKY), dipole-dipole and dipole - spin interactions. Our estimate of the interaction magnitude shows that there exist an optimal carrier concentration, at which the strength of ME interaction is maximal and comparable to that of spin-spin RKKY interaction. This permits to conclude that in substances, where RKKY interaction between local spins is not small, a substantial value of free carriers mediated ME interaction can occur. Our analysis shows that disorder in the above substances does not suppress multiferroic effects.
description: 4 pages, 1 figure