cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Two-particle Berry phase mechanism for Dirac and Majorana Kramers pairs of corner modes
Creators: name: Tan, Yi
name: Huang, Zhi-Hao
name: Liu, Xiong-Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We uncover a novel two-particle Berry phase mechanism to realize exotic corner modes in second-order topological insulators (TIs) and topological superconductors (TSCs) with time-reversal symmetry. We show that the nontrivial pseudospin textures of edge states in two different types of two-dimensional TIs give rise to the novel two-particle geometric phases in the particle-hole and particle-particle channels, respectively, for which the edge mass domain walls or intrinsic $π$-junctions emerge across corners when an external magnetic field or $s$-wave superconductivity is considered, hosting Dirac or Majorana corner modes. Remarkably, with this mechanism we predict the Majorana Kramers pair of corner modes by directly coupling the edge of a type-II time-reversal invariant TI to a uniform $s$-wave SC, in sharp contrast to the previous proposals which rely on unconventional SC pairing or complex setting for fine-tuned SC $π$-junction. We find Au/GaAs(111) to be a realistic material candidate for realizing such Majorana Kramers pair of corner modes.
description: 5 pages, 3 figures, plus Supplementary Material (11 pages). To appear in Phys. Rev. B (Letter)
X-ray Spectral Study of the extended emission,'the Cap', located 11.6 kpc above the disk of M82
Creators: name: Tsuru, Takeshi Go
name: Ozawa, Midori
name: Hyodo, Yoshiaki
name: Matsumoto, Hironori
name: Koyama, Katsuji
name: Awaki, Hisamitsu
name: Fujimoto, Ryuichi
name: Griffiths, Richard
name: Kilbourne, Caroline
name: Matsushita, Kyoko
name: Mitsuda, Kazuhisa
name: Ptak, Andrew
name: Ranalli, Piero
name: Yamasaki, Noriko Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The extended X-ray emission from 'the Cap' region located 11' (11.6 kpc) above the disk of the starburst galaxy M82 has been observed with Suzaku and XMM-Newton. Owing to the good energy resolution and the large collecting area of the XIS on Suzaku, combined with similar properties of the EPIC instrument on XMM-Newton, we have clearly detected K-shell emission lines from O VII, O VIII, Ne X, Mg XI, Mg XII and the Fe-L complex. Two optically-thin thermal plasma components are required to fit the observed X-ray spectra. We have determined the metal abundances of O, Ne, Mg, Si and Fe in this region for the first time. Their metal abundance ratios agree well with those of metal-poor stars and the model prediction of metals synthesized by type-II supernovae, but they are not consistent with the metallicities of type-Ia supernovae. This result is support for the idea that the origin of the metals in the Cap is type-II supernovae explosions occurring in the starburst regions in the M82 galaxy. We discuss the possible contribution from sputtered dust grains to the metals in the Cap. An emission line consistent with the C VI transition of n=4 to 1 at 0.459 keV is marginally detected, although it is not statistically significant at the 99% confidence level; the presence of this line would suggest charge-exchange processes in the Cap.
description: 16 pages, 10 figuers
Infectious disease dynamics in metapopulations with heterogeneous transmission and recurrent mobility
Creators: name: Cota, Wesley
name: Soriano-Paños, David
name: Arenas, Alex
name: Ferreira, Silvio C.
name: Gómez-Gardeñes, Jesús
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Human mobility, contact patterns, and their interplay are key aspects of our social behavior that shape the spread of infectious diseases across different regions. In the light of new evidence and data sets about these two elements, epidemic models should be refined to incorporate both the heterogeneity of human contacts and the complexity of mobility patterns. Here, we propose a theoretical framework that allows accommodating these two aspects in the form of a set of Markovian equations. We validate these equations with extensive mechanistic simulations and derive analytically the epidemic threshold. The expression of this critical value allows us to evaluate its dependence on the specific demographic distribution, the structure of mobility flows, and the heterogeneity of contact patterns, thus shedding light on the microscopic mechanisms responsible for the epidemic detriment driven by recurrent mobility patterns reported in the literature.
description: 24 pages, 7 figures
Quasiparticle scattering in a superconductor near a nematic critical point: resonance mode and multiple attractive channels
Creators: name: Pimenov, Dimitri
name: Kamenev, Alex
name: Chubukov, Andrey V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze the scattering rate for 2D fermions interacting via soft nematic fluctuations. The ground state is an s-wave superconductor, but other pairing channels are almost equally attractive. This strongly alters the scattering rate: At energies beyond the pairing gap $Δ$, it is renormalized by contributions from all pairing channels. At energies of order $Δ$, it is determined by the competition between scattering into a gapped continuum and dispersing nematic resonance. The outcome is a "peak-peak-dip-hump" spectrum, similar, but not identical, to the "peak-dip-hump" structure in the cuprates.
description: journal version; 4+5 pages
Τύπο επίλυσης των συγκρούσεων μεταξύ γονέα-εφήβου και η συμβολή των διαστάσεων της λειτουργικότητας της οικογένειας
Creators: name: Παναγιωτίδου, Αλίκη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: επίλυση σύγκρουσης
λειτουργικότητα οικογένειας
εφηβεία
conflict resolution
family functioning
adolescence

description: Στόχος της παρούσας έρευνας ήταν η διερεύνηση της σύνδεσης των τύπων επίλυσης των συγκρούσεων γονέων-εφήβων (Θετική επίλυση, Εμπλοκή στη σύγκρουση, Απόσυρση και Συμμόρφωση) και των δύο διαστάσεων της λειτουργικότητας της οικογένειας, της Συνοχής και της Προσαρμοστικότητας. Στο δείγμα συμμετείχαν 416 μαθητές/τριες Γυμνασίου και Λυκείου ηλικίας 12-19 ετών. Οι έφηβοι κλήθηκαν, με την βοήθεια δύο ερωτηματολογίων αυτό-αναφοράς, να αναφέρουν ποιους τρόπους χρησιμοποιούν για να επιλύουν τις διαφωνίες με τους γονείς τους και σε ποιο επίπεδο Συνοχής και Προσαρμοστικότητας αντιλαμβάνονται την οικογένεια τους. Η Θετική επίλυση του προβλήματος βρέθηκε ότι προβλέπεται θετικά από την Συναισθηματική Συνοχή και την Προσαρμοστικότητα της οικογένειας, ενώ η Εμπλοκή στη σύγκρουση και η Απόσυρση προβλέπονται αρνητικά μόνο από την διάσταση της Συνοχής. Στατιστικώς σημαντικές διαφορές ως προς το φύλο δεν βρέθηκαν, μόνο ως προς την εκπαιδευτική βαθμίδα (Γυμνάσιο και Λύκειο) σε σχέση με τον τύπο της Εμπλοκής στη σύγκρουση. Επίσης, αναδείχθηκε στατιστικώς σημαντική διαφορά ως προς την επαγγελματική κατάσταση του πατέρα και τους τύπους επίλυσης των συγκρούσεων.
description: The aim of the present study was to examine the connection between the conflict resolution styles of parent-adolescent conflict (positive problem solving, conflict engagement, withdrawal and compliance) and the two dimensions of family functioning, Cohesion and Adaptability. A total of 416 students of high school between 12 to 19 years of age participated. Adolescents were asked, by filling two self –report questionnaires, to report which styles of resolution they use for resolving their disagreements with their parents and also, in which level of cohesion and adaptability they perceive their family. Positive problem solving was positively predicted by cohesion and adaptability of the family, however, conflict engagement and withdrawal were negatively predicted only from the dimension of cohesion. In regard of sex differences, no significant differences were found, but differences were found in regard of the educational level (junior high /high school) and the conflict engagement. In addition, significant difference was found between conflict resolution styles and the professional situation of the father (employed/unemployed)
Hard rock pillar strength estimation an applied empirical approach
Creators: name: Lunder, Per John
Publisher: name: University of British Columbia
Year: 2009

description: Pillars are present in all hard rock mining operations and in order to effectively design these pillars, an estimate of the pillar strength is required. Two new pillar strength estimation methods for hard rock mine pillars are presented in this thesis. 31 pillar case histories of the database that was used to develop these new formulae were acquired during a cooperative study, entitled “Ground Stability Guidelines for the Extraction of Barrier Pillars in Hard Rock Mines”, between Westmin Resources Ltd. and The Canadian Centre for Mineral and Energy Technology (CANMET). 147 additional case histories were acquired from six documented hard rock pillar case studies in the literature, resulting in a combined database of 178 case histories. The combined database is comprised mainly of massive sulphide pillars with rock mass ratings of between 60% and 85%. Major structural features were not deemed to be an influence in pillar instability. Pillar stressess were calculated using either tributary area theory or numerical modelling methods. The factors determined to influence pillar strength for the combined database therefore are: • the average pillar confinement (which is a function of pillar geometry) • the unconfined compressive strength of the intact pillar material • the stresses that a pillar is subjected to The degree to which a pillar has failed is quantifiable using a pillar stability classification index which ranges from “1” (stable) to “5” (failed). The estimation of pillar stresses is preferably determined using threedimensional numerical modelling, but in some situations two-dimensional numerical modelling or tributary area theory may provide adequate results. It was concluded that the full size unconfined compressive strength of a pillar can be approximated by a strength size factor of 44 percent of the small scale unconfined compressive strength of intact pillar material. Two pillar strength formulae have been developed from the combined pillar database: “The Log-Power Shape Effect Formula” and “The Confinement Formula”. Both of the methods utilize the average pillar confinement. “The Log-Power Shape Effect Formula” is a refined shape effect formula which has a form similar to that proposed by researchers in the past. “The Confinement Formula” has a form that resembles the Mohr-Coulomb shear strength formula. The combined database was analyzed and the predicted strengths from “The Confinement Formula” was compared to the results for existing pillar strength methods (Hedley & Grant (1972), Bieniawski (1975), Salamon & Munro (1967), Obert & Duvall (1967), Hoek & Brown (1980)). “The Confinement Formula” is shown statistically to be the most reliable method of estimating the strength of the pillars that make up the combined database.
Discovery of Andromeda XIV: A Dwarf Spheroidal Dynamical Rogue in the Local Group?
Creators: name: Majewski, Steven R.
name: Beaton, Rachael L.
name: Patterson, Richard J.
name: Kalirai, Jasonjot S.
name: Geha, Marla C.
name: Muñoz, Ricardo R.
name: Seigar, Marc S.
name: Guhathakurta, Puragra
name: Gilbert, Karoline M.
name: Rich, R. Michael
name: Bullock, James
name: Reitzel, David B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the course of our survey of the outer halo of the Andromeda Galaxy we have discovered a remote, possible satellite of that system at a projected 162 kpc (11.7 degrees) radius. The fairly elongated (0.31 +/- 0.09 ellipticity) dwarf can be fit with a King profile of 1.07 kpc (d/784 kpc) limiting radius, where the satellite distance, d, is estimated at ~630-850 kpc from the tip of the red giant branch. The newfound galaxy, ``Andromeda XIV'' (``AndXIV''), distinguishes itself from other Local Group galaxies by its extreme dynamics: Keck/DEIMOS spectroscopy reveals it to have a large heliocentric radial velocity (-481 km/s), or -206 km/s velocity relative to M31. Even at its projected radius AndXIV already is at the M31 escape velocity based on the latest M31 mass models. If AndXIV is bound to M31, then recent models with reduced M31 virial masses need revision upward. If not bound to M31, then AndXIV is just now falling into the Local Group for the first time and represents a dwarf galaxy that formed and spent almost its entire life in isolation.
description: 5 pages, 5 figures, accepted for publication in ApJ Letters
The Relationship Between ICT use and Teaching and Learning in Government Aided Secondary Schools of Sheema District
Creators: name: Barekye Barisigara, Ronald Bahati, Denis Kintu
Publisher: name: Zenodo
Year: 2024

description: The study assessed the influence of relationship between ICT use and teaching and learning in government aided secondary schools of Sheema District. The study used a cross-sectional research design with both quantitative and qualitative approaches. The study population comprised 12 headteachers, 360 teachers, and 440 students, with a sample size of 268 respondents. Purposive and simple random sampling techniques were used for participant selection. Data were collected through a questionnaire survey for teachers and students and interviews for headteachers. Data analysis involved sorting, coding, and summarizing qualitative data and using Pearson coefficient correlation for quantitative data. The study also found a statistically significant correlation (p-value of 0.001, r=0.6) between internet accessibility and ICT use teaching and learning, suggesting that improvements in internet accessibility positively impact the teaching and learning process. In conclusion, students in Sheema District have positive perceptions about internet accessibility, and there is a significant correlation between internet accessibility and ICT use teaching and learning. As recommendations, policy makers should prioritize initiatives that address challenges faced by minority students in terms of internet access, data affordability, and electricity availability at schools.
Stationary multi-kinks in the discrete sine-Gordon equation
Creators: name: Parker, Ross
name: Kevrekidis, P. G.
name: Aceves, Alejandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 39A30, 37K60

description: We consider the existence and spectral stability of static multi-kink structures in the discrete sine-Gordon equation, as a representative example of the family of discrete Klein-Gordon models. The multi-kinks are constructed using Lin's method from an alternating sequence of well-separated kink and antikink solutions. We then locate the point spectrum associated with these multi-kink solutions by reducing the spectral problem to a matrix equation. For an $m$-structure multi-kink, there will be $m$ eigenvalues in the point spectrum near each eigenvalue of the primary kink, and, as long as the spectrum of the primary kink is imaginary, the spectrum of the multi-kink will be as well. We obtain analytic expressions for the eigenvalues of a multi-kink in terms of the eigenvalues and corresponding eigenfunctions of the primary kink, and these are in very good agreement with numerical results. We also perform numerical time-stepping experiments on perturbations of multi-kinks, and the outcomes of these simulations are interpreted using the spectral results.
description: 23 pages, 11 figures
Σαρακατσάνοι: η εθνική και η θρησκευτική τους συνείδηση
Creators: name: Γεωργίου, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Σαρακατσάνοι
εθνική συνείδηση
θρησκευτική συνείδηση
Sarakatsans
national conscience
religious conscience

description: Σκοπός αυτής της εργασίας ήταν η διερεύνηση της εθνικής και θρησκευτικής συνείδησης των Σαρακατσάνων. Πιο συγκεκριμένα, γίνεται εκτενής λόγος για τις θεωρίες της καταγωγής τους, για την καθημερινότητα και τον τρόπο ζωής τους, το ιστορικό πλαίσιο και τις μετακινήσεις τους από τον 18ο έως τον 20ο αιώνα, την γλώσσα και την εκπαίδευσή τους. Στην συνέχεια, παρουσιάζονται αναλυτικά στοιχεία για τις θρησκευτικές αντιλήψεις και τα λατρευτικά τους έθιμα, που αφορούν όλο το φάσμα της ανθρώπινης ζωής, από τη γέννηση έως και το θάνατο. Επιπλέον, αναφέρονται πληροφορίες για την συνεισφορά τους, στους αγώνες του έθνους και σύντομες βιογραφίες ηρώων, που σύμφωνα με τους Σαρακατσάνους, ανήκουν στη δική τους φυλή.
description: The aim of the present thesis was the investigation of the Sarakatsans’ national and religious consciousness. More specifically, are mentioned several and extensive theories about their origin and historical background, their everyday lifestyle, the historical context and their movements from the 18th to the 20th century, their language and education,. Furthermore, many details about their religious beliefs and their devotional customs are being presented, including the whole spectrum of human life, from birth to death. Also, there is plenty of information about their contribution to the struggles for their nation(Greek) and brief biographies of heroes, which according to Sarakatsans, belong to their own race.
A Calculus of Efficiency for Public Goods: The Case of Public Outdoor Recreation
Creators: name: Ulfat, Abderrahman
Publisher: name: Digital Repository at the University of Maryland
Year: 1972

description: The characteristics of public outdoor recreation as a public good
are ascertained. A cost-benefit analysis is applied which ensures
efficiency, while allowing for the pecuniary and technological externalities
that exist in the development of outdoor recreation resorts.
A total willingness to pay technique is utilized to approximate the
consumer's valuation of benefits from recreation. Essential to the
technique is the derivation of total willingness to pay curve which
parallels the demand curve for private goods. Total willingness to
pay is used instead of consumer's surplus, because the latter is associated
with a market price which is not determined for public outdoor recreation.
Since the total willingness to pay curve is a function of income
distribution, once derived, the curve can be adjusted to rid the analysis
of income distribution bias. The adjustment helps achieve equity in
the allocation of recreational resorts.
Fort Frederick State Park provided a case of application for the
technique. A sample survey conducted in the Fort was the basis for the
derivation of a total willingness to pay curve. The curve shows the
relation between expenditures incurred, in time and money, to visits at
Fort Frederick. The rates of growth for expenditures, income and
population were the basis for the simulation of the total willingness
to pay up to the year 2000. Integration of the areas under the simulated
demand curves was an approximation of the future willingness to pay or
benefits derived from recreational experience at the Fort.
After dividing the discounted value of benefits by the estimated
costs of developing the Fort, a benefit-cost ratio was obtained, which
was a quantitative endorsement in favor of the development of Fort
Frederick.
A remark on manageable multiplicative unitaries
Creators: name: Sołtan, P. M.
name: Woronowicz, S. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L89

description: We propose a weaker condition for multiplicative unitary operators related to quantum groups, than the condition of manageability introduced by S.L. Woronowicz. We prove that all the main results of the theory of manageable multiplicative unitaries remain true under this weaker condition. We also show that multiplicative unitaries arising naturally in the construction of some recent examples of non-compact quantum groups satisfy our condition, but fail to be manageable.
Η επίδραση της μακροχρόνιας εφαρμογής υγρής κόπρου στις φυσικές και μηχανικές ιδιότητες του εδάφους
Creators: name: Μπαγκέρης, Πέτρος Στεφάνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: υγρή κόπρος
δομή εδάφους
εδαφικές ιδιότητες
liquid manure
soil structure
soil properties

description: Σκοπός της παρούσας εργασίας ήταν η διεξοδική έρευνα στην επίδραση της μακροχρόνιας εφαρμογής υγρής κόπρου στις φυσικές και μηχανικές ιδιότητες του εδάφους. Τα αποτελέσματα έδειξαν ότι η μακροχρόνια εφαρμογή υγρής κόπρου επηρέασε θετικά τη διαμερισμένη άργιλο ως ποσοστό της συνολικής αργίλου, τη φαινομενική πυκνότητα, το σταθμικό μέσο όρο μεγέθους συσσωματωμάτων και την υδραυλική αγωγιμότητα στον κορεσμό ενώ δεν επηρέασε σχεδόν καθόλου τη σταθερότητα συσσωματωμάτων στη διαβροχή, το ολικό πορώδες, το ποσοστό πόρων ακτίνας > 30 μm, τη γραμμική συρρίκνωση και την αντίσταση διείσδυσης. Γενικά, φαίνεται ότι η εφαρμοζόμενη υγρή κοπριά σε αυτή την ποσότητα (8 τόνοι/στρέμμα/έτος) δεν είναι αρκετή ώστε να έχει ευνοϊκή επίδραση στο σύνολο των φυσικών και μηχανικών ιδιοτήτων του συγκεκριμένου εδάφους.
description: This study investigates the effect of long-term application of liquid cattle manure on physical-mechanical properties of soil. According to the results it seems that application of liquid manure had a positive affection on dispersed clay as a proportion of total clay, on bulk density, on hydraulic conductivity and on the mean diameter of aggregates. On the other hand, it did not affect the water stable aggregates, on total porosity, on the volume of larger pores, on linear shrinkage and on penetration resistance. In general, application of liquid manure in this proportion (8tn/acre/year) was not enough.
Solar rotation rate and its gradients during cycle 23
Creators: name: Antia, H. M.
name: Basu, Sarbani
name: Chitre, S. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Available helioseismic data now span almost the entire solar activity cycle 23 making it possible to study solar-cycle related changes of the solar rotation rate in detail. In this paper we study how the solar rotation rate, in particular, the zonal flows change with time. In addition to the zonal flows that show a well known pattern in the solar convection zone, we also study changes in the radial and latitudinal gradients of the rotation rate, particularly in the shear layer that is present in the immediate sub-surface layers of the Sun. In the case of the zonal-flow pattern, we find that the band indicating fast rotating region close to the equator seems to have bifurcated around 2005. Our investigation of the rotation-rate gradients show that the relative variation in the rotation-rate gradients is about 20% or more of their average values, which is much larger than the relative variation in the rotation rate itself. These results can be used to test predictions of various solar dynamo models.
description: To appear in ApJ. Fig 5 has been corrected in this version
Charge-Density-Wave-Induced Peak-Dip-Hump Structure and the Multiband Superconductivity in a Kagome Superconductor CsV$_{3}$Sb$_{5}$
Creators: name: Lou, Rui
name: Fedorov, Alexander
name: Yin, Qiangwei
name: Kuibarov, Andrii
name: Tu, Zhijun
name: Gong, Chunsheng
name: Schwier, Eike F.
name: Büchner, Bernd
name: Lei, Hechang
name: Borisenko, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The entanglement of charge density wave (CDW), superconductivity, and topologically nontrivial electronic structure has recently been discovered in the kagome metal $A$V$_3$Sb$_5$ ($A$ = K, Rb, Cs) family. With high-resolution angle-resolved photoemission spectroscopy, we study the electronic properties of CDW and superconductivity in CsV$_3$Sb$_5$. The spectra around $\bar{K}$ is found to exhibit a peak-dip-hump structure associated with two separate branches of dispersion, demonstrating the isotropic CDW gap opening below $E_{\rm F}$. The peak-dip-hump lineshape is contributed by linearly dispersive Dirac bands in the lower branch and a dispersionless flat band close to $E_{\rm F}$ in the upper branch. The electronic instability via Fermi surface nesting could play a role in determining these CDW-related features. The superconducting gap of $\sim$0.4 meV is observed on both the electron band around $\barΓ$ and the flat band around $\bar{K}$, implying the multiband superconductivity. The finite density of states (DOS) at $E_{\rm F}$ in the CDW phase are most likely in favor of the emergence of multiband superconductivity, particularly the enhanced DOS associated with the flat band. Our results not only shed light on the controversial origin of the CDW, but also offer insights into the relationship between CDW and superconductivity.
description: 6 pages, 4 figures, PRL in press
title: Zum Andenken an Professor Dr. Otto Hunziker von Aarau, Bern und Zürich
title: geboren am 13. August 1841, gestorben am 23. Mai 1909 : [Nekrolog]
titleType: Subtitle
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 1909
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Hunziker, Otto
subject: Zürich-Unterstrass

description: Separatabdruck auf dem Jahresheft des Vereins schweizerischer Gymnasiallehrer pro 1909
Four-particle solutions to Baxter equation of SL(2,C) Heisenberg spin magnet for integer conformal Lorentz spin and their normalizability
Creators: name: Kotanski, Jan
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The four reggeized gluon states for non-vanishing Lorentz conformal spin $n_h$ are considered. To calculate their spectrum the Q-Baxter method is used. As a result we describe normalizable trajectory-like states, which form continuous spectrum, as well as discrete point-like solutions, which turn out to be non-normalizable. The point-like solutions exist due to symmetry of the Casimir operator where conformal weights $(h,\bar h) \to (h,1-\bar h)$.
description: 36 pages, 14 figures
Redshift-space limits of bound structures
Creators: name: Dünner, Rolando
name: Reisenegger, Andreas
name: Meza, Andrés
name: Araya, Pablo A.
name: Quintana, Hernán
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An exponentially expanding Universe, possibly governed by a cosmological constant, forces gravitationally bound structures to become more and more isolated, eventually becoming causally disconnected from each other and forming so-called "island universes". This new scenario reformulates the question about which will be the largest structures that will remain gravitationally bound, together with requiring a systematic tool that can be used to recognize the limits and mass of these structures from observational data, namely redshift surveys of galaxies. Here we present a method, based on the spherical collapse model and N-body simulations, by which we can estimate the limits of bound structures as observed in redshift space. The method is based on a theoretical criterion presented in a previous paper that determines the mean density contrast that a spherical shell must have in order to be marginally bound to the massive structure within it. Understanding the kinematics of the system, we translated the real-space limiting conditions of this "critical" shell to redshift space, producing a projected velocity envelope that only depends on the density profile of the structure. From it we created a redshift-space version of the density contrast that we called "density estimator", which can be calibrated from N-body simulations for a reasonable projected velocity envelope template, and used to estimate the limits and mass of a structure only from its redshift-space coordinates.
description: Contains 12 pages, 12 figures and 8 tables
Worldsheet boundary conditions in Poisson-Lie T-duality
Creators: name: Albertsson, Cecilia
name: Reid-Edwards, Ronald A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply canonical Poisson-Lie T-duality transformations to bosonic open string worldsheet boundary conditions, showing that the form of these conditions is invariant at the classical level, and therefore they are compatible with Poisson-Lie T-duality. In particular the conditions for conformal invariance are automatically preserved, rendering also the dual model conformal. The boundary conditions are defined in terms of a gluing matrix which encodes the properties of D-branes, and we derive the duality map for this matrix. We demonstrate explicitly the implications of this map for D-branes in two non-Abelian Drinfel'd doubles.
description: 20 pages, Latex; v2: typos and wording corrected, references added; v3: three-dimensional example added, reference added, discussion clarified, published version
Robust EMRAN-aided Coupled Controller for Autonomous Vehicles
Creators: name: Debarshi, Sauranil
name: Sundaram, Suresh
name: Sundararajan, Narasimhan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper presents a coupled, neural network-aided longitudinal cruise and lateral path-tracking controller for an autonomous vehicle with model uncertainties and experiencing unknown external disturbances. Using a feedback error learning mechanism, an inverse vehicle dynamics learning scheme utilizing an adaptive Radial Basis Function (RBF) neural network, referred to as the Extended Minimal Resource Allocating Network (EMRAN) is employed. EMRAN uses an extended Kalman filter for online learning and weight updates, and also incorporates a growing/pruning strategy for maintaining a compact network for easier real-time implementation. The online learning algorithm handles the parametric uncertainties and eliminates the effect of unknown disturbances on the road. Combined with a self-regulating learning scheme for improving generalization performance, the proposed EMRAN-aided control architecture aids a basic PID cruise and Stanley path-tracking controllers in a coupled form. Its performance and robustness to various disturbances and uncertainties are compared with the conventional PID and Stanley controllers, along with a comparison with a fuzzy-based PID controller and an active disturbance rejection control (ADRC) scheme. Simulation results are presented for both slow and high speed scenarios. The root mean square (RMS) and maximum tracking errors clearly indicate the effectiveness of the proposed control scheme in achieving better tracking performance in autonomous vehicles under unknown environments.
Voices of First Nations women : their politics and political organizing in Vancouver, B.C.
Creators: name: Cole, Susan C.
Publisher: name: University of British Columbia
Year: 2009

description: As a contribution to the literature on Aboriginal women and politics on the Northwest Coast, this study focuses on the experiences of nine First Nations women who are community leaders in Vancouver, British Columbia. They are involved in political work in various settings: First Nations political organizations on the local, national and international levels, the government, non-governmental agencies, service organizations, tribal councils, and/or community projects. The research methods used are interviewing, the collection of life histories and collaboration, with a feminist and reflexive approach. Informal, interactive interviews were carried out with these particular First Nations women, and contacts were made with other Aboriginal men and women in the city of Vancouver. A significant part of this thesis are brief life histories that include the individual voices of the nine participants. These women have moved to Vancouver from reserves or small communities throughout B.C., and most of them have also participated in the political process in these communities. Some are currently active in both regions. Their narratives emphasize the strong ties they have to their families, communities, and nations. I conclude that these particular women’s connections to both domains are complex and it is not always easy for them to move back and forth to their homeland. This research bridges two units of analysis within anthropology: community studies that focus on Aboriginal women and politics on reserves, and urban studies that include the experiences of Aboriginal women in the city. The concerns of these First Nations women span from the urban center to the reserve or small community, although they are residing in Vancouver. They need to inform both non-Aboriginals and other First Nations people of their links to their communities and to the land.
A New Well-posed Nonlocal Perona-Malik Type Equation
Creators: name: Guidotti, Patrick
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 35A05, 35B40, 35K55, 35K65

description: A modification of the Perona-Malik equation is proposed for which the local nonlinear diffusion term is replaced by a nonlocal term of slightly reduced ``strength''. The new equation is globally well-posed (in spaces of classical regularity) and possesses desirable properties from the perspective of image processing. It admits characteristic functions as (formally linearly ``stable'') stationary solutions and can therefore be reliably employed for denoising keeping blurring in check. Its numerical implementation is stable, enhances some of the features of Perona-Malik, and avoids problems known to affect the latter.
Όροι αντιστροφής των ευαγγελικών αφηγήσεων στο μυθιστόρημα "Ο άνεμος σφυρίζει στην Κουπέλα" του Θανάση Τριαρίδη
Creators: name: Βασιλειάδου, Γαλάτεια Ελένη Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Θανάσης Τριαρίδης
Αποδόμηση
Αντιάγγελμα
θάνατος
Γκάβλα
Μεταμόρφωση
Thanasis Triaridis
Deconstruction
Anti-gospel
Death
Libido
Metamorphosis

description: Στην παρούσα εργασία εξετάζονται οι διαδρομές άρνησης της Ευαγγελικής αφήγησης στο μυθιστόρημα Ο άνεμος σφυρίζει στην Κουπέλα του Θανάση Τριαρίδη. Συγκεκριμένα, γίνεται συγκριτική μελέτη αποσπασμάτων του μυθιστορήματος και αποστολικών χωρίων, προκειμένου να αναδειχθούν εκδοχές άρνησης και αντιστροφής των Ευαγγελικών κειμένων. Επιπλέον, εξηγούνται οι λόγοι που κρίνεται σκόπιμη η εισαγωγή του αντιαγγέλματος, όρου που χαρακτηρίζει με ακρίβεια την πρόθεση του συγγραφέα για αποσχηματισμό των παραδεδομένων χριστιανικών αφηγήσεων. Στο κυρίως μέρος της εργασίας παρουσιάζονται επιμέρους παραδείγματα που εδραιώνουν την απόπειρα για αποδιδαχή και αποδιοργάνωση των χριστιανικών σχημάτων (Σταύρωση, Μυστικός Δείπνος, Αντίχριστος κ.α). Σποραδικά, σχολιάζονται έννοιες όπως θυσία, θάνατος, σωτηρία, αμαρτία, ορμή αλλά και άλλες, με σκοπό να γίνει καταφανής η τάση του συγγραφέα για αποκανονικοποίηση του χριστιανικού σύμπαντος. Τέλος, συνοψίζονται οι τρόποι άρνησης του ορθόδοξου Ευαγγελικού σχεδίου που διατρέχουν το μυθιστόρημα και δομούνται πάνω στο βασικό τρίπτυχο χαμού, ερεθισμού (τριαριδικής γκάβλας) και μεταμόρφωσης.
description: In the present thesis the course that leads to the negation of the gospel narrative in Thanasis Triaridis’ novel Deathwind breathing on Cupela is examined. More specifically, a comparative analysis between excerpts from the novel and apostolic excerpts is attempted in order to bring to light aspects of negation and inversion of the Evangelical texts. Moreover, the reasons why the introduction of the term anti-Gospelis necessary are explained, as this term describes precisely the author’s intention of deposing traditional Christian narratives. In the main body of the thesis specific examples, which confirm the author’s attempt for anti-teaching and deconstruction of Christian forms (the Crucifixion, the Last Supper, the Antichrist etc) are displayed. Concepts such as sacrifice, death, salvation, sin, libido etc are commented upon in order to indicate the author’s inclination to de-canonize the Christian universe. Finally, the means of negating the orthodox Evangelical plan, which permeate the novel and are constructed on the threefold basis of doom, lust and metamorphosis, are summarized.
Borromean droplet in three-component ultracold Bose gases
Creators: name: Ma, Yinfeng
name: Peng, Cheng
name: Cui, Xiaoling
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Borromean ring refers to a peculiar structure where three rings are linked together while any two of them are unlinked. Here we propose the realization of its quantum mechanical analog in a many-body system of three-component ultracold bosons. Namely, we identify the {\it Borromean droplet}, where only the ternary bosons can form a self-bound droplet while any binary subsystems cannot. Its formation is facilitated by an additional attractive force induced by the density fluctuation of a third component, which enlarges the mean-field collapse region in comparison to the binary case and renders the formation of Borromean droplet after incorporating the repulsive force from quantum fluctuations. Outside the Borromean regime, the competition between ternary and binary droplets leads to an interesting phenomenon of droplet phase separation, manifested by double plateaus in the density profile. We further show that the transition between different droplets and gas phase can be conveniently tuned by boson numbers and interaction strengths. The study reveals the possibility of Borromean binding in the many-body world and sheds light on more intriguing many-body bound state formed in multi-component systems.
description: 6+3 pages,4+1 figures, published version
DATA VISUALIZATION IN PYTHON
Creators: name: Shoyqulov, Shodmonkul
Publisher: name: Zenodo
Year: 2024

description: This article discusses the main approaches and tools for data visualization in Python, a popular programming language in the field of data analysis and science. Data visualization is an important step in analytical processes, allowing you to clearly present information, identify trends and relationships. Python offers a wide range of libraries for creating graphs, charts, and interactive visualizations, including Matplotlib, Seaborn, Plotly, and Bokeh. The article also provides examples of practical application of data visualization, from time series analysis to interactive and animated graphs. The advantages and limitations of Python for data visualization are considered, as well as prospects for its further development in this direction.
Commodianus Instructiones liber 2
Creators: name: Ζαρωτιάδης, Νικόλαος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Κομμοδιανός
Χριστιανισμός
Εθνικοί
Commodianus
Christianism
Gentiles

description: Ο Κομμοδιανός είναι ίσως ο πιο αινιγματικός Χριστιανός ποιητής. Δυστυχώς, γνωρίζουμε ελάχιστα για εκείνον. Η μοναδική πηγή είναι το έργο De viris illustribus του Γεννάδιου Μασσαλίας. Ο Κομμοδιανός πιθανόν γεννήθηκε και έδρασε στην Αφρική τον τρίτο αιώνα μ.Χ. Έγραψε τους Instructiones που αποτελούνται από 80ποιήματα και το Carmen Apologeticum, ένα ποίημα (1060 στίχων) γραμμένο σε δαχτυλικό εξάμετρο . Στη συγκεκριμένη εργασία προσφέρεται ελληνική μετάφραση, πλούσια εισαγωγή και σχόλια του δεύτερου βιβλίου των Instructiones.
description: Commodian is maybe the most enigmatic and mysterious Christian poet. Unfοrtunately, we don’t know much about him. We only have a testimony of De viris illustribus of Gennadius from Marseilles. Commodian is probably an African of the third century A.D. Even nowadays researchers don’t agree on many topics about him. He wrote Instructiones, which consists of two books: a collection of eighty poems written in hexameter against pagans and Judish. He also wrote one carmen apologeticum, a poem of 1060 hexameters, which narrates Old Testament and the fight between God and Devil in the Second Coming and the Divine Judgement. Τhe C.A. has never been translated in Modern Greek. This thesis tries to offer a translation, as much as possible close to the original text, combined with a rich pragmatological, interpretative and based to the text comment. In addition, it offers an analytical introduction to Commodian’s life, resourses and writing action.
Evolutionary Prisoner's Dilemma on heterogeneous Newman-Watts small-world network
Creators: name: Fu, Feng
name: Liu, Lianghuan
name: Wang, Long
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 91A43; 91D30

description: We focus on the heterogeneity of social networks and its role to the emergence of prevailing cooperation and sustaining cooperators. The social networks are representative of the interaction relationships between players and their encounters in each round of games. We study an evolutionary Prisoner's Dilemma game on a variant of Watts-Strogatz small-world network, whose heterogeneity can be tuned by a parameter. It is found that optimal cooperation level exists at some intermediate topological heterogeneity for different temptations to defect. Moreover, neither the most heterogeneous case nor the most homogeneous one would favor the cooperators. At intermediate heterogeneity in degree sequences, cooperators could resist the invasion of defectors for large temptation to defect.
description: Updated version
Tracing the Mass-Dependent Star Formation History of Late-Type Galaxies using X-ray Emission: Results from the Chandra Deep Fields
Creators: name: Lehmer, B. D.
name: Brandt, W. N.
name: Alexander, D. M.
name: Bell, E. F.
name: Hornschemeier, A. E.
name: McIntosh, D. H.
name: Bauer, F. E.
name: Gilli, R.
name: Mainieri, V.
name: Schneider, D. P.
name: Silverman, J. D.
name: Steffen, A. T.
name: Tozzi, P.
name: Wolf, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the X-ray evolution over the last ~9 Gyr of cosmic history (i.e., since z = 1.4) of late-type galaxy populations in the Chandra Deep Field-North and Extended Chandra Deep Field-South (CDF-N and E-CDF-S, respectively; jointly CDFs) survey fields. Our late-type galaxy sample consists of 2568 galaxies, which were identified using rest-frame optical colors and HST morphologies. We utilized X-ray stacking analyses to investigate the X-ray emission from these galaxies, emphasizing the contributions from normal galaxies that are not dominated by active galactic nuclei (AGNs). Over this redshift range, we find significant increases (factors of ~5--10) in the X-ray--to--optical mean luminosity ratio (L_X/L_B) and the X-ray--to--stellar-mass mean ratio (L_X/M*) for galaxy populations selected by L_B and M*, respectively. When analyzing galaxy samples selected via SFR, we find that the mean X-ray--to--SFR ratio (L_X/SFR) is consistent with being constant over the entire redshift range for galaxies with SFR = 1--100 Msol yr^-1, thus demonstrating that X-ray emission can be used as a robust indicator of star-formation activity out to z = 1.4. We find that the star-formation activity (as traced by X-ray luminosity) per unit stellar mass in a given redshift bin increases with decreasing stellar mass over the redshift range z = 0.2--1, which is consistent with previous studies of how star-formation activity depends on stellar mass. Finally, we extend our X-ray analyses to Lyman break galaxies at z ~ 3 and estimate that L_X/L_B at z ~ 3 is similar to its value at z = 1.4.
description: Accepted for publication in ApJ. 21 pages, 16 figures, and 3 tables
Measurement of sin2beta in tree-dominated B0-decays and ambiguity removal
Creators: name: Lacker, Heiko
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The most recent results from the B-factories on the time-dependent CP asymmetries measured in B0-decays mediated by b --> c c(bar) s quark-transitions are reviewed. The Standard Model interpretation of the results in terms of the parameter sin2beta leads to a four-fold ambiguity on the unitarity triangle beta which can be reduced to a two-fold ambiguity by measuring the sign of the parameter cos2beta. The results on cos2beta obtained so far are reviewed.
description: 6 pages, 3 postscript figues, contributed to the Proceedings of Beauty2006
A Hybrid High-Order method for incompressible flows of non-Newtonian fluids with power-like convective behaviour
Creators: name: Quiroz, Daniel Castanon
name: Di Pietro, Daniele Antonio
name: Harnist, André
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 75A05, 76D05, 65N30, 65N08, 65N12

description: In this work, we design and analyze a Hybrid High-Order (HHO) discretization method for incompressible flows of non-Newtonian fluids with power-like convective behaviour. We work under general assumptions on the viscosity and convection laws, that are associated with possibly different Sobolev exponents r > 1 and s > 1. After providing a novel weak formulation of the continuous problem, we study its well-posedness highlighting how a subtle interplay between the exponents r and s determines the existence and uniqueness of a solution. We next design an HHO scheme based on this weak formulation and perform a comprehensive stability and convergence analysis, including convergence for general data and error estimates for shear-thinning fluids and small data. The HHO scheme is validated on a complete panel of model problems.
description: 34 pages, 3 figures, 3 tables. arXiv admin note: text overlap with arXiv:2003.13467
MobileNet v1 with Symmetric Per-Tensor quantization.
Creators: name: Sequeira, Dilip
Publisher: name: Zenodo
Year: 2019

description: A mobilenet model with symmetric per-tensor quantization. Please see the README for how to use the weights. Please note that it is identical to the one at https://zenodo.org/record/2600560#.XTzNiehKguW save that it has information on the provenance of the weights and is released under Apache 2.0 rather than CC 4.0.