cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Very Well-Covered Graphs with the Erdős-Ko-Rado Property
Creators: name: De Silva, Jessica
name: Dionne, Adam B.
name: Dunkelberg, Aidan
name: Harris, Pamela E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C35

description: A family of independent $r$-sets of a graph $G$ is an $r$-star if every set in the family contains some fixed vertex $v$. A graph is $r$-EKR if the maximum size of an intersecting family of independent $r$-sets is the size of an $r$-star. Holroyd and Talbot conjecture that a graph is $r$-EKR as long as $1\leq r\leq\frac{μ(G)}{2}$, where $μ(G)$ is the minimum size of a maximal independent set. It is suspected that the smallest counterexample to this conjecture is a well-covered graph. Here we consider the class of very well-covered graphs $G^*$ obtained by appending a single pendant edge to each vertex of $G$. We prove that the pendant complete graph $K_n^*$ is $r$-EKR when $n \geq 2r$ and strictly so when $n>2r$. Pendant path graphs $P_n^*$ are also explored and the vertex whose $r$-star is of maximum size is determined.
description: 10 pages
Οι πρώτοι δάσκαλοι της Αθωνιάδας Ακαδημίας
Creators: name: Τερζίδου, Ελισσάβετ Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Αθωνιάδα Ακαδημία
Πρώτοι Δάσκαλοι Αθωνιάδας
Athos Academy
First teachers of Athos Academy

description: Σκοπός της παρούσας εργασίας ήταν η καταγραφή και η μελέτη των πρώτων δασκάλων της Αθωνιάδας Ακαδημίας. Στα πρώτα κεφάλαια καταγράψαμε εν συντομία τα γεγονότα της πρώτης περιόδου από την ίδρυση της Αθωνιάδας και στη συνέχεια παρουσιάσαμε τους πρώτους δασκάλους, Ευγένιο Βούλγαρη, Νεόφυτο Καυσοκαλυβίτη, Παναγιώτη Παλαμά, Νικόλαο (Τ)ζερ(τ)ζούλη και συγκεκριμένα τη ζωή, το έργο και τη δράση τους. Επιχειρήσαμε να αναδείξουμε τους δασκάλους αυτούς και το ρόλο που διαδραμάτισε η σχολή στην Ορθόδοξη Εκκλησία.
description: The purpose of this work was to record and study the first teachers of the Athonia Academy. In the first chapters we briefly recorded the events of the first period from the foundation of Athonias and then we presented the first teachers, Evgenios Voulgaris, Neophytos Kawsokalyvitis, Panagiotis Palamas, Nikolaos (T)zer(t)zoulis and specifically the life, the work and their action. We tried to highlight these teachers and the role played by the school in the Orthodox Church.
Relative Commutator Theory in Semi-Abelian Categories
Creators: name: Everaert, Tomas
name: Van der Linden, Tim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Category Theory (math.CT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 18E10, 17D10, 20J

description: Basing ourselves on the concept of double central extension from categorical Galois theory, we study a notion of commutator which is defined relative to a Birkhoff subcategory B of a semi-abelian category A. This commutator characterises Janelidze and Kelly's B-central extensions; when the subcategory B is determined by the abelian objects in A, it coincides with Huq's commutator; and when the category A is a variety of omega-groups, it coincides with the relative commutator introduced by the first author.
description: 22 pages
Breaking the $O(n)$-Barrier in the Construction of Compressed Suffix Arrays and Suffix Trees
Creators: name: Kempa, Dominik
name: Kociumaka, Tomasz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The suffix array and the suffix tree are the two most fundamental data structures for string processing. For a length-$n$ text, however, they use $Θ(n \log n)$ bits of space, which is often too costly. To address this, Grossi and Vitter [STOC 2000] and, independently, Ferragina and Manzini [FOCS 2000] introduced space-efficient versions of the suffix array, known as the compressed suffix array (CSA) and the FM-index. Sadakane [SODA 2002] then showed how to augment them to obtain the compressed suffix tree (CST). For a length-$n$ text over an alphabet of size $σ$, these structures use only $O(n\logσ)$ bits. The biggest remaining open question is how efficiently they can be constructed. After two decades, the fastest algorithms still run in $O(n)$ time [Hon et al., FOCS 2003], which is $Θ(\log_σ n)$ factor away from the lower bound of $Ω(n/\log_σn)$. In this paper, we make the first in 20 years improvement in $n$ for this problem by proposing a new compressed suffix array and a new compressed suffix tree which admit $o(n)$-time construction algorithms while matching the space bounds and the query times of the original CSA/CST and the FM-index. More precisely, our structures take $O(n\logσ)$ bits, support SA queries and full suffix tree functionality in $O(\log^εn)$ time per operation, and can be constructed in $O(n \min(1,\logσ/\sqrt{\log n}))$ time using $O(n\logσ)$ bits of working space. We derive this result as a corollary from a much more general reduction: We prove that all parameters of a compressed suffix array/tree (query time, space, construction time, and construction working space) can essentially be reduced to those of a data structure answering new query types that we call prefix rank and prefix selection. Using the novel techniques, we also develop a new index for pattern matching.
description: Published at SODA 2023
Monodromy Groups of Dessins d'Enfant on Rational Triangular Billiards Surfaces
Creators: name: Mabe, Madison
name: Moy, Richard A.
name: Schmurr, Jason
name: Varlack, Japheth
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: A dessin d'enfant, or dessin, is a bicolored graph embedded into a Riemann surface, and the monodromy group is an algebraic invariant of the dessin generated by rotations of edges about black and white vertices. A rational billiards surface is a two dimensional surface that allows one to view the path of a billiards ball as a continuous path. In this paper, we classify the monodromy groups of dessins associated to rational triangular billiards surfaces.
Optimally sweeping convex polygons with two and three guards
Creators: name: Jabbari, Zohreh
Publisher: name: University of British Columbia
Year: 2010

description: Given a polygon P, we considered the problem of finding the shortest total paths for two and three mobile guards to cover P. In our definition of the problem, we do not limit the movements of the guards. The guards are allowed to start their paths at any point on the polygon, cross the interior or intersect each other's paths if necessary. A polygon P is covered by two guards if every point in P is on the line that connects the guards at some point in time. We proved that if the polygon is convex, the optimal sweep limits the paths of the guards to the perimeter of the polygon. In the optimal solution the guards may start their paths at the end-points of the longest edge of P and end their paths at the end-points of the second longest edge in P, visiting the n-2 other edges along the way. Finding such a path takes O(n) time. With three, the guarding problem is defined differently. In the three guard problem a point is covered if it is on the triangle formed by the guards at some point in the sweep. We found that even in convex polygons in some cases crossing the polygon makes the sweep shorter. However, we showed that the optimal sweep is always simple (i.e., the guards paths do not cross one another). By recognizing the conditions where interior paths are beneficial we were able to present an algorithm to find the optimal 3-guard path in O(n⁵) time.
In-Domain Self-Supervised Learning Improves Remote Sensing Image Scene Classification
Creators: name: Dimitrovski, Ivica
name: Kitanovski, Ivan
name: Simidjievski, Nikola
name: Kocev, Dragi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We investigate the utility of in-domain self-supervised pre-training of vision models in the analysis of remote sensing imagery. Self-supervised learning (SSL) has emerged as a promising approach for remote sensing image classification due to its ability to exploit large amounts of unlabeled data. Unlike traditional supervised learning, SSL aims to learn representations of data without the need for explicit labels. This is achieved by formulating auxiliary tasks that can be used for pre-training models before fine-tuning them on a given downstream task. A common approach in practice to SSL pre-training is utilizing standard pre-training datasets, such as ImageNet. While relevant, such a general approach can have a sub-optimal influence on the downstream performance of models, especially on tasks from challenging domains such as remote sensing. In this paper, we analyze the effectiveness of SSL pre-training by employing the iBOT framework coupled with Vision transformers trained on Million-AID, a large and unlabeled remote sensing dataset. We present a comprehensive study of different self-supervised pre-training strategies and evaluate their effect across 14 downstream datasets with diverse properties. Our results demonstrate that leveraging large in-domain datasets for self-supervised pre-training consistently leads to improved predictive downstream performance, compared to the standard approaches found in practice.
Stochastic Algorithms for Self-consistent Calculations of Electronic Structures
Creators: name: Ko, Taehee
name: Li, Xiantao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The convergence property of a stochastic algorithm for the self-consistent field (SCF) calculations of electron structures is studied. The algorithm is formulated by rewriting the electron charges as a trace/diagonal of a matrix function, which is subsequently expressed as a statistical average. The function is further approximated by using a Krylov subspace approximation. As a result, each SCF iteration only samples one random vector without having to compute all the orbitals. We consider the common practice of SCF iterations with damping and mixing. We prove with appropriate assumptions that the iterations converge in the mean-square sense, when the stochastic error has an almost sure bound. We also consider the scenario when such an assumption is weakened to a second moment condition, and prove the convergence in probability.
Interplay of Direct and Indirect Searches for New Physics
Creators: name: Hurth, Tobias
name: Kraml, Sabine
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report recent work on the interplay of collider and flavour physics regarding the search for physics beyond the Standard Model.
description: 4 pages, based on an invited talk at PANIC11, MIT, Cambridge, USA, 24.-29.7.2011
Leia beckeri Landrock 1940
Creators: name: El Mouden, Mohamed Amin
name: Chandler, Peter J.
name: Saidoun, Imane
name: Driauach, Ouafaa
name: Belqat, Boutaïna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mycetophilidae
Leia
Leia beckeri

description: Leia beckeri Landrock, 1940
Material examined.
Morocco – Middle Atlas Region • 1 ♀; Oued Boussbaâ; 22/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2437.
North African distribution.
Algeria (Becker 1907 as L. bifasciata; Hackman et al. 1988; Chandler 2009); Morocco (Banamar et al. 2020).
description: Published as part of El Mouden, Mohamed Amin, Chandler, Peter J., Saidoun, Imane, Driauach, Ouafaa & Belqat, Boutaïna, 2025, A new species of Docosia Winnertz, 1864 and new records of fungus gnats (Diptera, Bolitophilidae, Keroplatidae and Mycetophilidae) from North Africa, pp. 349-379 in ZooKeys 1233 on pages 349-379, DOI: 10.3897/zookeys.1233.130502
Iron and alpha-element Production in the First One Billion Years after the Big Bang
Creators: name: Becker, George D.
name: Sargent, Wallace L. W.
name: Rauch, Michael
name: Carswell, Robert F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present measurements of carbon, oxygen, silicon, and iron in quasar absorption systems existing when the universe was roughly one billion years old. We measure column densities in nine low-ionization systems at 4.7 < z < 6.3 using Keck, Magellan, and VLT optical and near-infrared spectra with moderate to high resolution. The column density ratios among C II, O I, Si II, and Fe II are nearly identical to sub-DLAs and metal-poor ([M/H] < -1) DLAs at lower redshifts, with no significant evolution over 2 < z < 6. The estimated intrinsic scatter in the ratio of any two elements is also small, with a typical r.m.s. deviation of <0.1 dex. These facts suggest that dust depletion and ionization effects are minimal in our z > 4.7 systems, as in the lower-redshift DLAs, and that the column density ratios are close to the intrinsic relative element abundances. The abundances in our z > 4.7 systems are therefore likely to represent the typical integrated yields from stellar populations within the first gigayear of cosmic history. Due to the time limit imposed by the age of the universe at these redshifts, our measurements thus place direct constraints on the metal production of massive stars, including iron yields of prompt supernovae. The lack of redshift evolution further suggests that the metal inventories of most metal-poor absorption systems at z > 2 are also dominated by massive stars, with minimal contributions from delayed Type Ia supernovae or AGB winds. The relative abundances in our systems broadly agree with those in very metal-poor, non-carbon-enhanced Galactic halo stars. This is consistent with the picture in which present-day metal-poor stars were potentially formed as early as one billion years after the Big Bang.
description: Accepted for publication in ApJ
Deep Learning and Computer Vision Methodologies for in Vitro Fertilization Applications
Creators: name: Βέργος, Γεώργιος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Τεχνιτή Νοημοσύνη
Εξωτερική Γονιμοποίηση
Βαθιά Μάθηση
Artificial Intelligence (AI)
In Vitro Fertilization
Deep Learning

description: The most critical stage in an In Vitro Fertilization (IVF) treatment is the selection of the most suitable embryo for transfer. The regular approach to embryo evaluation is done manually. It invokes the evaluation of embryos by trained embryologists who observe them using light microscopes. At the end of the evaluation, the embryologist gives a description/score to each embryo trying to rank them in order of preference. The embryo with the best score is consid- ered the most suitable for transfer. Unfortunately, the evaluation of embryos involves a large degree of subjectivity and thus there is a large variation in grading. Artificial Intelligence (AI) has achieved remarkable success over the past few years in many fields including medical imag- ing and has the potential to optimize medical practices. In this work, various Deep Learning (DL) algorithms are trained on a private dataset of embryo images, to identify the most suitable embryos for transfer. The model proposed consists of three binary classifiers which are then used to train an ensemble. Finally, 5 instances of the ensemble model are trained to create a voting classifier for the final output. The accuracy of the final model is quite satisfactory given the small number of data.
description: Το πιο ϰρίσιµο στάδιο σε µια ϑεραπεία εξωσωµατιϰής γονιµοποίησης (IVF) είναι η επιλογή του πιο ϰατάλληλου εµβρύου για µεταφορά. Η συνήϑης προσέγγιση για την αξιολόγηση των εµβρύων γίνεται µε το χέρι. Η αξιολόγηση των εµβρύων πραγµατοποιείται από εϰπαιδευµέ- νους εµβρυολόγους που τα παρατηρούν χρησιµοποιώντας µιϰροσϰόπια. Στο τέλος της αξι- ολόγησης, ο εµβρυολόγος δίνει µια περιγραφή/βαϑµολογία σε ϰάϑε έµβρυο προσπαϑώντας να τα ϰατατάξει ϰατά σειρά προτίµησης. Το έµβρυο µε την ϰαλύτερη βαϑµολογία ϑεωρείται το ϰαταλληλότερο για µεταφορά. ∆υστυχώς, η αξιολόγηση των εµβρύων εµπεριέχει µεγάλο βαϑµό υποϰειµενιϰότητας ϰαι έτσι υπάρχει µεγάλη διαϰύµανση στη βαϑµολόγηση. Η τεχνητή νοηµοσύνη (AI) έχει επιτύχει εϰπληϰτιϰά πράγµατα τα τελευταία χρόνια σε πολλούς τοµείς, συµπεριλαµβανοµένης της ιατριϰής απειϰόνισης, ϰαι έχει τη δυνατότητα να βελτιστοποιήσει τις ιατριϰές πραϰτιϰές. Στην παρούσα εργασία, διάφοροι αλγόριϑµοι Deep Learning (DL) εϰπαιδεύονται σε ένα ιδιωτιϰό σύνολο δεδοµένων ειϰόνων εµβρύων, για τον εντοπισµό των ϰαταλληλότερων εµβρύων για µεταφορά. Το προτεινόµενο µοντέλο αποτελείται από τρεις δυαδιϰούς ταξινοµητές, οι οποίοι χρησιµοποιούνται στη συνέχεια για την εϰπαίδευση ενός συνόλου. Τέλος, 5 περιπτώσεις του συνολιϰού µοντέλου εϰπαιδεύονται για τη δηµιουργία ενός ταξινοµητή ψηφοφορίας για την τελιϰή έξοδο. Η αϰρίβεια του τελιϰού µοντέλου είναι αρϰετά ιϰανοποιητιϰή δεδοµένου του µιϰρού αριϑµού δεδοµένων που ηπήρχε στη διάϑεσή µας.
Illumination: an adult educator's journey - dialogues with adult educators and adult learners in indigenous Western Australia
Creators: name: Kawalilak, Colleen Anne
Publisher: name: Education
Year: 2004

description: Bibliography: p. 260-274
description: This research explored how dialogue across cultures transformed participants' perspectives on adult education and lifelong learning. I dialogued with ten Indigenous and non-Indigenous colleagues in Western Australia, all studying or working within Indigenous, adult educational settings. Written autoethnographically, this research explored: (i) Indigenous perspectives on adult education and lifelong learning; (ii) the co-creation of knowledge and understanding through dialogue; (iii) Indigenous perspectives on the Western, linear, competency-based approach to adult education initiatives; and (iv) how my perspective and practice is expanded by stepping beyond my own culture. Through dialogue, moments of significant learning were revealed and revisited. The analysis of the dialogues (all audio-taped and transcribed) involved: field notes, journal reflections; multiple episodes of listening to and reading dialogues; thematic coding and identification. The data revealed that embracing holistic, soulful adult education practices was critical. Holistic referred to an interconnected and relational approach to learning. Soulful referred to principled, purposeful, intuitive, balanced, inclusive, loving-learning cultures. The data suggested that for deep learning to take place, connection to all aspects of the environment was paramount. This connection nourished healing, harmony, individuals and communities. Four specific concepts evolved from the data: the power of story; an equality of difference; the significance of space; and oneness. Through story sharing, new meaning was made of lived experience. We sought to understand lived experience through a new lens. Cultural differences were explored. Beyond difference, in a safe space based on trust, we communed with oneness. Safe space, experienced externally and internally as a place where contrariety was welcomed and not feared, invited participants to explore the meaning of difference. Within the cocoon of safe space and out of a realized valuing of diversity, oneness was born. Oneness, experienced as a transformed awareness of intrinsic connection to a greater whole, spoke of an unbroken completeness where each individual and the environment, in its entirety, were fundamentally essential to this whole. Through this spirit and practice, individuals felt empowered to reclaim their voice. Through dialogue, new meaning was made of life-learning moments. Dialogue provided participants with various ways, not previously considered, of viewing the world. This contributed to the transformation of perspectives. Future considerations and directions for adult educators are drawn from this research.
Thermodynamics of decoherence
Creators: name: Popovic, Maria
name: Mitchison, Mark T.
name: Goold, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the nonequilibrium thermodynamics of pure decoherence. In a pure decoherence process, the system Hamiltonian is a constant of motion and there is no direct energy exchange between the system and its surroundings. Nevertheless, the environment's energy is not generally conserved and in this work we show that this leads to nontrivial heat dissipation as a result of decoherence alone. This heat has some very distinctive properties: it obeys an integral fluctuation relation and can be interpreted in terms of the entropy production associated with populations in the energy eigenbasis of the initial state. We show that the heat distribution for a pure decoherence process is different from the distribution of work done by the initial system-bath interaction quench. Instead, it corresponds to a mixture of work distributions of cyclical processes, each conditioned on a state of the open system. Inspired by recent experiments on impurities in ultra-cold gases, we demonstrate our general results by studying the heat generated by the decoherence of a qubit immersed within a degenerate Fermi gas in the lowest band of a species-selective optical lattice.
description: v1: 4+3 pages, 3 figures. Comments welcome. v3: Final published version. Code to generate plots can be found in the arXiv source files
Consistent simulation of non-resonant diphoton production at hadron collisions with a custom-made parton shower
Creators: name: Odaka, Shigeru
name: Kurihara, Yoshimasa
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have developed a Monte Carlo event generator for non-resonant diphoton ($γγ$) production at hadron collisions in the framework of GR@PPA, which consistently includes additional one-jet production. The jet-matching method developed for initial-state jet production has been extended to the final state in order to regularize the final-state QED divergence in the $qg \rightarrow γγ+ q$ process. A QCD/QED-mixed parton shower (PS) has been developed to complete the matching. The PS has the capability of enforcing hard-photon radiation, and small-$Q^{2}$ photon radiations that are not covered by the PS are supplemented by using a fragmentation function. The generated events can be passed to general-purpose event generators in order to perform the simulations down to the hadron level. Thus, we can simulate the isolation requirements that must be applied in experiments at the hadron level. The simulation results are in reasonable agreement with the predictions from RESBOS and DIPHOX. The simulated hadron-level events can be further fed to detector simulations in order to investigate the detailed performance of experiments.
description: 23 pages, 15 figures
Towards a Modular Framework for Visco-Hyperelastic Simulations of Soft Material Manipulators with Well-Parameterised Material
Creators: name: Bartholdt, Max
name: Berthold, Rebecca
name: Schappler, Moritz
Publisher: name: Piscataway, NJ : IEEE
Year: 2023
Subjects: subject: Pneumatic actuators
subject: Software packages
subject: Object oriented modeling
subject: Dynamics
subject: Soft robotics
subject: Pneumatic systems
subject: Numerical models
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Controller design for continuum robots maintains to be a difficult task. Testing controllers requires dedicated work in manufacturing and investment into hardware as well as software, to acquire a test bench capable of performing dynamic control tasks. Typically, proprietary software for practical controller design such as Matlab/Simulink is used but lacks specific implementations of soft material robots. This intermediate work presents the results of a toolchain to derive well-identified rod simulations. State-of-the-art methods to simulate the dynamics of continuum robots are integrated into an object-oriented implementation and wrapped into the Simulink framework. The generated S-function is capable of handling arbitrary, user-defined input such as pressure actuation or external tip forces as demonstrated in numerical examples. With application to a soft pneumatic actuator, stiffness parameters of a nonlinear hyperelastic material law are identified via finite element simulation and paired with heuristically identified damping parameters to perform dynamic simulation. To prove the general functionality of the simulation, a numerical example as well as a benchmark from literature is implemented and shown. A soft pneumatic actuator is used to generate validation data, which is in good accordance with the respective simulation output. The tool is provided as an open-source project. Code is available under https://gitlab.com/soft_material_robotics/cosserat-rod-simulink-sfunction.© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
A Luttinger Liquid Core Inside Helium-4 Filled Nanopores
Creators: name: Del Maestro, Adrian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: As helium-4 is cooled below 2.17 K it undergoes a phase transition to a fundamentally new state of matter known as a superfluid which supports flow without viscosity. This type of dissipationless transport can be observed by forcing helium to travel through a narrow constriction that the normal liquid could not penetrate. Recent experiments have highlighted the feasibility of fabricating smooth pores with nanometer radii, that approach the truly one dimensional limit where it is believed that a system of bosons (like helium-4) may have startlingly different behavior than in three dimensions. The one dimensional system is predicted to have a linear hydrodynamic description known as Luttinger liquid theory, where no type of long range order can be sustained. In the limit where the pore radius is small, Luttinger liquid theory would predict that helium inside the channel behaves as a sort of quasi-supersolid with all correlations decaying as power-law functions of distance at zero temperature. We have performed large scale quantum Monte Carlo simulations of helium-4 inside nanopores of varying radii at low temperature with realistic helium-helium and helium-pore interactions. The results indicate that helium inside the nanopore forms concentric cylindrical shells surrounding a core that can be described via Luttinger liquid theory and provides insights into the exciting possibility of the experimental detection of this intriguing low dimensional state of matter.
description: 26 pages, 10 figures
Zooming into the low luminosity protostar IRAS 16253-2429 with ALMA & JWST
Creators: name: Narang, Mayank
Publisher: name: Zenodo
Year: 2023

description: We present a joint ALMA & JWST study of the IRAS 16253 protostar, combining data from the eDisk & Investigating Protostellar Accretion Programs. This very low-mass protostar in rho-Oph has a mass of 0.12 Msun & a luminosity of 0.2 Lsun. With ALMA & JWST, we trace the flows of gas during the protostellar phase that drives the formation process of stars & planetary systems. During their primary accretion phase, protostars are too deeply embedded to be studied in the optical & NIR wavelengths. With JWST, we can detect these deeply embedded Class 0 protostars. Using NIRSpec & MIRI IFUs, we spectral image the 2.9-29 micron wavelength range with a resolution of 30 au at the distance of rho-Oph. While JWST can map the ionic & molecular species, including H2, in shock-heated gas, it doesn't have sufficient velocity resolution to study the gas kinematics. Using ALMA, we can detect the cool in lines of isotopologues of CO that trace the cold gas that dominates the mass of envelopes & outflows with similar spatial resolution. Our analyses reveal a highly collimated, ~400 au long (dynamical time scale 12 yrs) jet in [Fe II], while no such collimated molecular jet is detected with ALMA. We find that the radius of this jet is about 23 au, comparable to the radius of the protostellar disk (30 au). The CO outflow also has a similar radius. This hints that jet & outflow originate from the entire disk surface. The absence of the molecular jet raises intriguing questions about the underlying mechanisms of launching jets & outflows from protostars. In the cavities, we find jets traced in ions but without molecules. Using JWST, we measure the velocity (~169 km/s) & the mass flow through the jet, indicating a low mass flow of ~10^-10 Msun/yr. We map both shocks from H2 & entrained gas from ALMA CO lines. Together, these data show how ALMA & JWST can link the jets &  winds driving the outflows to the flows of entrained gas responsible for lowering the star formation efficiency.
title: International Planning History Society Proceedings, Vol 14 No 1 (2010): Urban transformation: controversies, contrasts and challenges
title: Urban transformation: controversies, contrasts and challenges
titleType: AlternativeTitle
Creators: name: International Planning History Society Proceedings
Publisher: name: International Planning History Society Proceedings
Year: 2016

description: Proceedings of the 15th International Planning History Society Conference
Istanbul, Turkey
July 12-15, 2010
Conference theme: ‘Urban transformation: controversies, contrasts and challenges’.
Convenor: Nuran Zeren Gülersoy.
Microscopic study of Ca$+$Ca fusion
Creators: name: Keser, R.
name: Umar, A. S.
name: Oberacker, V. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the fusion barriers for reactions involving Ca isotopes $\mathrm{^{40}Ca}+\mathrm{^{40}Ca}$, $\mathrm{^{40}Ca}+\mathrm{^{48}Ca}$, and $\mathrm{^{48}Ca}+\mathrm{^{48}Ca}$ using the microscopic time-dependent Hartree-Fock theory coupled with a density constraint. In this formalism the fusion barriers are directly obtained from TDHF dynamics. We also study the excitation of the pre-equilibrium GDR for the $\mathrm{^{40}Ca}+\mathrm{^{48}Ca}$ system and the associated $γ$-ray emission spectrum. Fusion cross-sections are calculated using the incoming-wave boundary condition approach. We examine the dependence of fusion barriers on collision energy as well as on the different parametrizations of the Skyrme interaction.
description: 11 pages, 13 figures
Progress of Solar Technology and Potential Farm Uses
Creators: name: Heid, Walter G.
name: Trotter, Warren K.
name: Heid, Walter G.
name: Trotter, Warren K.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Crop Production/Industries
subject: Livestock Production/Industries
subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: Solar
subject: agriculture
subject: economics
subject: research
subject: development

description: The most efficient use of solar energy on farms is space heating and cooling of livestock buildings, drying crops, and heating farm homes. Low-cost, homemade solar collectors, having multiple uses and a payback of less than 5 years, are the most popular systems. In contrast, most commercially produced systems are still too expensive for agricultural uses, partly because they fail to qualify for tax credits as large as those allowed for residential uses. The solar industry has shown little interest in marketing the low-cost technologies specifically developed for agriculture.
A high-order accurate particle-in-cell method
Creators: name: Edwards, Essex
Publisher: name: University of British Columbia
Year: 2010

description: We propose the use of high-order accurate interpolation and approximation schemes alongside high-order accurate time integration methods to enable high-order accurate Particle-in-Cell methods. The key insight is to view the unstructured set of particles as the underlying representation of the continuous fields; the grid used to evaluate integro-differential coupling terms is purely auxiliary. We also include a novel regularization term to avoid the accumulation of noise in the particle samples without harming the convergence rate. We include numerical examples for several model problems: advection-diffusion, shallow water, and incompressible Navier-Stokes in vorticity formulation. The implementation demonstrates fourth-order convergence, shows very low numerical dissipation, and is competitive with high-order accurate Eulerian schemes.
Mechanical basis and topological routes to cell elimination
Creators: name: Monfared, Siavash
name: Ravichandran, Guruswami
name: Andrade, Jose E.
name: Doostmohammadi, Amin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Cell layers eliminate unwanted cells through the extrusion process, which underlines healthy versus flawed tissue behaviors. Although several biochemical pathways have been identified, the underlying mechanical basis including the forces involved in cellular extrusion remain largely unexplored. Utilizing a phase-field model of a three-dimensional cell layer, we study the interplay of cell extrusion with cell-cell and cell-substrate interactions, in a flat monolayer. Independent tuning of cell-cell versus cell-substrate adhesion forces reveals that extrusion events can be distinctly linked to defects in nematic and hexatic orders associated with cellular arrangements. Specifically, we show that by increasing relative cell-cell adhesion forces the cell monolayer can switch between the collective tendency towards five-fold, hexatic, disclinations relative to half-integer, nematic, defects for extruding a cell. We unify our findings by accessing three-dimensional mechanical stress fields to show that an extrusion event acts as a mechanism to relieve localized stress concentration.
Importance of correlation effects in hcp iron revealed by a pressure-induced electronic topological transition
Creators: name: Glazyrin, K.
name: Pourovskii, L. V.
name: Dubrovinsky, L.
name: Narygina, O.
name: McCammon, C.
name: Hewener, B.
name: Schünemann, V.
name: Wolny, J.
name: Muffler, K.
name: Chumakov, A. I.
name: Crichton, W.
name: Hanfland, M.
name: Prakapenka, V.
name: Tasnádi, F.
name: Ekholm, M.
name: Aichhorn, M.
name: Vildosola, V.
name: Ruban, A. V.
name: Katsnelson, M. I.
name: Abrikosov, I. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We discover that hcp phases of Fe and Fe0.9Ni0.1 undergo an electronic topological transition at pressures of about 40 GPa. This topological change of the Fermi surface manifests itself through anomalous behavior of the Debye sound velocity, c/a lattice parameter ratio and Mössbauer center shift observed in our experiments. First-principles simulations within the dynamic mean field approach demonstrate that the transition is induced by many-electron effects. It is absent in one-electron calculations and represents a clear signature of correlation effects in hcp Fe.
title: International Planning History Society Proceedings, Vol 14 No 2 (2010): Urban transformation: controversies, contrasts and challenges
title: Urban transformation: controversies, contrasts and challenges
titleType: AlternativeTitle
Creators: name: International Planning History Society Proceedings
Publisher: name: International Planning History Society Proceedings
Year: 2016

description: Proceedings of the 15th International Planning History Society Conference
Istanbul, Turkey
July 12-15, 2010
Conference theme: ‘Urban transformation: controversies, contrasts and challenges’.
Convenor: Nuran Zeren Gülersoy.
Data Preservation and Long Term Analysis in High Energy Physics
Creators: name: South, David M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Digital Libraries (cs.DL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Several important and unique experimental high-energy physics programmes at a variety of facilities are coming to an end, including those at HERA, the B-factories and the Tevatron. The wealth of physics data from these experiments is the result of a significant financial and human effort, and yet until recently no coherent strategy existed for data preservation and re-use. To address this issue, an inter-experimental study group on data preservation and long-term analysis in high-energy physics was convened at the end of 2008, publishing an interim report in 2009. The membership of the study group has since expanded, including the addition of the LHC experiments, and a full status report has now been released. This report greatly expands on the ideas contained in the original publication and provides a more solid set of recommendations, not only concerning data preservation and its implementation in high-energy physics, but also the future direction and organisational model of the study group. The main messages of the status report were presented for the first time at the 2012 International Conference on Computing in High Energy and Nuclear Physics and are summarised in these proceedings.
description: Proceedings of plenary talk given at the 2012 International Conference on Computing in High Energy and Nuclear Physics (CHEP 2012). 8 pages, 4 figures
The conditions which facilitate and challenge online support staff's services for web-based college courses: a case study
Creators: name: McCausland, Sean R.
Publisher: name: Education
Year: 2005

description: Bibliography: p. 100-103
description: Online support staff workers perfom1 essential services for equipping instructors and students to participate in web-based courses. However, very few studies have either focused exclusively on this staff, or provided excerpts of their own thoughts about their work. This study describes four support staff workers' services for web-based course delivery at a Western Canadian college, and the conditions that support and challenge the staff in their work. The data collection emerged from personal interviews augmented by two observations and a review of relevant college documents. The study revealed that this staff adds extensive value to online course delivery by laying the groundwork for course participants, maintaining a quality learning environment, and preparing for the future of e-leaming. The study further demonstrated that collaboration, support from others, reliable technology and the intrinsic fulfillment of work benefited the staff immensely. Finally, the study revealed that inadequately shared work, uncertainty over funding, performance of sudden and time-consuming tasks, and confusion over boundaries ofresponsibility were challenging to the staffs efforts.
Supermassive black hole pairs at separations < 1Kpc and their role in black hole growth
Creators: name: Droguett-Callejas, Macarena
name: Treister, Ezequiel
name: Barcos-Muñoz, Loreto
Publisher: name: Zenodo
Year: 2023

description: While not very frequent, major galaxy mergers play a critical role in our understanding of galaxy formation and evolution. In spite of this, we still do not understand the key connection between these events and the rapid growth of the central supermassive black holes (SMBHs) during them, mainly because the latter likely happens during the most obscured phases.In this talk, I will present a study of a population of dual AGN candidates near coalescence, all of them with nuclear separations below one kpc. This is only now possible, thanks to Atacama Large Millimeter Array (ALMA)'s high-resolution, sensitivity, and the ability to observe in the millimeter regime, which is relatively unaffected by dust obscuration. 
By taking advantage of the observed correlation between x-ray and mm-emission in AGN, now well-established for isolated sources, we can first confirm or unveil the presence of dual AGN in a sample of local major galaxy mergers with archival ALMA observations, including IR-luminous systems from the Great Observatories All-Sky LIRG Survey (GOALS) sample. With these data, we can then measure their individual luminosities, and hence the associated SMBH accretion rates. Our preliminary results indicate that already confirmed dual AGN follow this correlation as well. We will present a study of the 100 GHz continuum morphologies and in-band spectral indices for the systems in our sample, which will allow us to identify non-thermal emission, unveiling the presence of an AGN. 
Finally, I will present preliminary results from our long baseline ALMA Cycle 9 observations of 12 Swift-BAT AGN in the local Universe hosted by late-stage major galaxy mergers, allowing us to significantly expand the sample of known dual AGN at small nuclear separations, to hence do a more robust statistical study of the incidence of dual AGN in these systems.
Self-supervised learning via inter-modal reconstruction and feature projection networks for label-efficient 3D-to-2D segmentation
Creators: name: Morano, José
name: Aresta, Guilherme
name: Lachinov, Dmitrii
name: Mai, Julia
name: Schmidt-Erfurth, Ursula
name: Bogunović, Hrvoje
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Deep learning has become a valuable tool for the automation of certain medical image segmentation tasks, significantly relieving the workload of medical specialists. Some of these tasks require segmentation to be performed on a subset of the input dimensions, the most common case being 3D-to-2D. However, the performance of existing methods is strongly conditioned by the amount of labeled data available, as there is currently no data efficient method, e.g. transfer learning, that has been validated on these tasks. In this work, we propose a novel convolutional neural network (CNN) and self-supervised learning (SSL) method for label-efficient 3D-to-2D segmentation. The CNN is composed of a 3D encoder and a 2D decoder connected by novel 3D-to-2D blocks. The SSL method consists of reconstructing image pairs of modalities with different dimensionality. The approach has been validated in two tasks with clinical relevance: the en-face segmentation of geographic atrophy and reticular pseudodrusen in optical coherence tomography. Results on different datasets demonstrate that the proposed CNN significantly improves the state of the art in scenarios with limited labeled data by up to 8% in Dice score. Moreover, the proposed SSL method allows further improvement of this performance by up to 23%, and we show that the SSL is beneficial regardless of the network architecture.
description: To appear in MICCAI 2023. Code: https://github.com/j-morano/multimodal-ssl-fpn
title: International Planning History Society Proceedings, Vol 14 No 3 (2010): Urban transformation: controversies, contrasts and challenges
title: Urban transformation: controversies, contrasts and challenges
titleType: AlternativeTitle
Creators: name: International Planning History Society Proceedings
Publisher: name: International Planning History Society Proceedings
Year: 2016

description: Proceedings of the 15th International Planning History Society Conference
Istanbul, Turkey
July 12-15, 2010
Conference theme: ‘Urban transformation: controversies, contrasts and challenges’.
Convenor: Nuran Zeren Gülersoy.
Density estimation in RKHS with application to Korobov spaces in high dimensions
Creators: name: Kazashi, Yoshihito
name: Nobile, Fabio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistics Theory (math.ST)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: A kernel method for estimating a probability density function (pdf) from an i.i.d. sample drawn from such density is presented. Our estimator is a linear combination of kernel functions, the coefficients of which are determined by a linear equation. An error analysis for the mean integrated squared error is established in a general reproducing kernel Hilbert space setting. The theory developed is then applied to estimate pdfs belonging to weighted Korobov spaces, for which a dimension independent convergence rate is established. Under a suitable smoothness assumption, our method attains a rate arbitrarily close to the optimal rate. Numerical results support our theory.
ALMACAL: Untargeted CO Emission Line Survey
Creators: name: Bollo, Victoria
name: Zwaan, Martin
name: Peroux, Celine
name: Hamanowicz, Aleksandra
Publisher: name: Zenodo
Year: 2023

description: Star formation in the Universe peaks about two billion years post-Big Bang, with molecular gas (H2) driving the process, especially through CO emission. ALMA's progress is hindered by limited survey sizes and cosmic variance effects on cosmic gas mass density accuracy.
ALMACAL, an extensive survey using ALMA calibration data, compiles over 30 TB of data, exceeding previous survey volumes tenfold. We have developed automated algorithms to construct ALMA image cubes, run source-finding algorithms, and assess the CO-luminosity function in ALMA Band 3 across redshift. Preliminary results highlight the potential of the entire dataset to refine our understanding of the evolution of molecular gas density in the Universe.
title: International Planning History Society Proceedings, Vol 15 No 1 (2012): Cities, nations and regions in planning history
title: Cities, nations and regions in planning history
titleType: AlternativeTitle
Creators: name: International Planning History Society Proceedings
Publisher: name: International Planning History Society Proceedings
Year: 2016

description: Proceedings of the 15th International Planning History Society Conference
São Paulo, Brazil
July 15-18, 2012
Conference theme: ‘Cities, nations and regions in planning history’.
Convenor: Maria Cristina da Silva Leme
No-go theorems for R symmetries in four-dimensional GUTs
Creators: name: Fallbacher, Maximilian
name: Ratz, Michael
name: Vaudrevange, Patrick K. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We prove that it is impossible to construct a grand unified model, based on a simple gauge group, in four dimensions that leads to the exact MSSM, nor to a singlet extension, and possesses an unbroken R symmetry. This implies that no MSSM model with either a Z_{M>=3}^R or U(1)_R symmetry can be completed by a four-dimensional GUT in the ultraviolet. However, our no-go theorem does not apply to GUT models with extra dimensions. We also show that it is impossible to construct a 4D GUT that leads to the MSSM plus an additional anomaly-free symmetry that forbids the mu term.
description: 11+1 pages