cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analyzing the Benefits of HIIT for Bariatric Patients During the COVID-19 Pandemic
Creators: name: Chan, Delon
name: Ali, Hamza
name: Filafilo, Dante A.
Publisher: name: The Health & Fitness Journal of Canada
Year: 2021

description: Background: The COVID-19 pandemic has affected millions since December 2019, with certain demographics facing an increased risk. Purpose: The purpose of this narrative review was to explore the negative effects of COVID-19 in bariatric patients and analyze the benefits of HIIT for this population during the COVID-19 pandemic. Methods: The current literature was searched with relevant keywords through UBC Library, Google Scholar, PubMed, and Medline. Results: Bariatric patients have a higher BMI which is associated with a compromised pulmonary function and immune response, placing them at a greater risk for adverse effects of COVID-19. Patients with obesity experience altered systemic metabolism, influencing glucose and insulin levels and causing an impaired response to immune function. HIIT is effective at controlling glucose levels and insulin output, improving the immune response and potentially reducing the risk for COVID-19. Conclusion: HIIT was found to provide various neurological, immunopathological, and cardiovascular benefits for bariatric patients. Future research should analyze HIIT as a mediator for severe COVID-19 in obese populations.
description: The Health & Fitness Journal of Canada, Vol. 14 No. 2 (2021)
Noncommutative Geometry as a Framework for Unification of all Fundamental Interactions including Gravity. Part I
Creators: name: Chamseddine, Ali H.
name: Connes, Alain
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the hypothesis that space-time is a product of a continuous four-dimensional manifold times a finite space. A new tensorial notation is developed to present the various constructs of noncommutative geometry. In particular, this notation is used to determine the spectral data of the standard model. The particle spectrum with all of its symmetries is derived, almost uniquely, under the assumption of irreducibility and of dimension 6 modulo 8 for the finite space. The reduction from the natural symmetry group SU(2)xSU(2)xSU(4) to U(1)xSU(2)xSU(3) is a consequence of the hypothesis that the two layers of space-time are finite distance apart but is non-dynamical. The square of the Dirac operator, and all geometrical invariants that appear in the calculation of the heat kernel expansion are evaluated. We re-derive the leading order terms in the spectral action. The geometrical action yields unification of all fundamental interactions including gravity at very high energies. We make the following predictions: (i) The number of fermions per family is 16. (ii) The symmetry group is U(1)xSU(2)xSU(3). (iii) There are quarks and leptons in the correct representations. (iv) There is a doublet Higgs that breaks the electroweak symmetry to U(1). (v) Top quark mass of 170-175 Gev. (v) There is a right-handed neutrino with a see-saw mechanism. Moreover, the zeroth order spectral action obtained with a cut-off function is consistent with experimental data up to few percent. We discuss a number of open issues. We prepare the ground for computing higher order corrections since the predicted mass of the Higgs field is quite sensitive to the higher order corrections. We speculate on the nature of the noncommutative space at Planckian energies and the possible role of the fundamental group for the problem of generations.
description: 56 pages
Effect of Aerobic Fitness on Cortisol Response and HPA-Axis Reactivity at Different Aerobic Exercise Intensities
Creators: name: Do, Phillip
name: Guo, Flora
name: Warburton, Darren
Publisher: name: The Health & Fitness Journal of Canada
Year: 2021

description: Cortisol is a hormone typically associated with the body’s reaction to a stressor. As exercise intensity increases, the HPA-axis reacts to the negative net energy demand by releasing cortisol to increase the availability of energy substrates to supply the working muscles and organs. This evidence-based review assesses multiple positive and negative feedback mechanisms associated with the HPA-axis to explain its reactivity to aerobic exercise at different intensities where a marked increase in salivary cortisol is observed at exercise intensities above 60% of one’s heart rate reserve. The review also explains different mechanisms as to how an increase in maximal aerobic fitness can influence the salivary cortisol levels during exercise. Recommendations for future studies in this area on how to design a study to mitigate confounding variables are also discussed.
description: The Health & Fitness Journal of Canada, Vol. 14 No. 2 (2021)
The Evolution of Luminous Compact Blue Galaxies: Disks or Spheroids?
Creators: name: Pisano, D. J.
name: Rabidoux, K.
name: Garland, C. A.
name: Guzman, R.
name: Castander, F. J.
name: Perez-Gallego, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Luminous compact blue galaxies (LCBGs) are a diverse class of galaxies characterized by high luminosity, blue color, and high surface brightness that sit at the critical juncture of galaxies evolving from the blue to the red sequence. As part of our multi-wavelength survey of local LCBGs, we have been studying the HI content of these galaxies using both single-dish telescopes and interferometers. Our goals are to determine if single-dish HI observations represent a true measure of the dynamical mass of LCBGs and to look for signatures of recent interactions that may be triggering star formation in LCBGs. Our data show that while some LCBGs are undergoing interactions, many appear isolated. While all LCBGs contain HI and show signatures of rotation, the population does not lie on the Tully-Fisher relation nor can it evolve onto it. Furthermore, the HI maps of many LCBGs show signatures of dynamically hot components, suggesting that we are seeing the formation of a thick disk or spheroid in at least some LCBGs. There is good agreement between the HI and H-alpha kinematics for LCBGs, and both are similar in appearance to the H-alpha kinematics of high redshift star-forming galaxies. Our combined data suggest that star formation in LCBGs is primarily quenched by virial heating, consistent with model predictions.
description: 4 pages, 2 figures, to appear in the proceedings of IAU Symposium 277, "Tracing the Ancestry of Galaxies on the Land of our Ancestors", eds. C. Carignan, K.C. Freeman, and F. Combes
title: Ð¢ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¿ÑÐ¾ÑÐµÑÑ Ð°ÑÐ³Ð¾Ð½Ð¾Ð´ÑÐ³Ð¾Ð²Ð¾Ð¹ ÑÐ²Ð°ÑÐºÐ¸ Ð·Ð¼ÐµÐµÐ²Ð¸ÐºÐ° ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð¿ÐµÑÐ¸ ÐÐ-801
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Technological process of argon arc welding of the coil of a convective furnace BA-801
Creators: name: ÐÑÐ¶Ð½ÑÐ¹, ÐÐ»ÐµÐºÑÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: ÑÑÑÐ½Ð°Ñ Ð°ÑÐ³Ð¾Ð½Ð¾Ð´ÑÐ³Ð¾Ð²Ð°Ñ ÑÐ²Ð°ÑÐºÐ°
Ð·Ð¼ÐµÐµÐ²Ð¸Ðº ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð²Ð½ÑÐ¹
ÑÐµÐ¿Ð»Ð¾ÑÑÑÐ¾Ð¹ÑÐ¸Ð²Ð°Ñ ÑÑÐ°Ð»Ñ
ÑÐµÑÐ¼Ð¸ÑÐµÑÐºÐ°Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ°
ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÐºÐ°ÑÐµÑÑÐ²Ð°
manual argon-arc welding
coil convection
heat-resistant steel
heat treatment
quality control

description: ÐÐ°ÑÑÐ¾ÑÑÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ° ÑÐ±Ð¾ÑÐºÐ¸, ÑÐ²Ð°ÑÐºÐ¸ Ð¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð·Ð¼ÐµÐµÐ²Ð¸ÐºÐ° Ð¿ÐµÑÐ¸ Ð²Ð¸Ð·Ð±ÑÐµÐºÐ¸Ð½Ð³Ð°, Ð²ÐµÑÑÐ¸ÐºÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ñ Ð³Ð¾ÑÐ¸Ð·Ð¾Ð½ÑÐ°Ð»ÑÐ½ÑÐ¼Ð¸ ÑÑÑÐ±ÑÐ°ÑÑÐ¼Ð¸ Ð·Ð¼ÐµÐµÐ²Ð¸ÐºÐ°Ð¼Ð¸ Ð² Ð·Ð¾Ð½Ðµ ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð¸ Ð¸ Ð²ÐµÑÑÐ¸ÐºÐ°Ð»ÑÐ½ÑÐ¼Ð¸ Ð·Ð¼ÐµÐµÐ²Ð¸ÐºÐ°Ð¼Ð¸ Ð² Ð·Ð¾Ð½Ðµ ÑÐ°Ð´Ð¸Ð°ÑÐ¸Ð¸.
ÐÐµÑÑ Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð° Ð´Ð»Ñ Ð½Ð°Ð³ÑÐµÐ²Ð° Ð³ÑÐ´ÑÐ¾Ð½Ð° ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð²Ð¸Ð·Ð±ÑÐµÐºÐ½Ð³Ð° Ð¿Ð¾ÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾ Ð² Ð·Ð¼ÐµÐµÐ²Ð¸ÐºÐ°Ñ ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð¸ Ð¸ ÑÐ°Ð´Ð¸Ð°ÑÐ¸Ð¸ Ð´Ð¾ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÑ 460 â Ð½Ð° Ð²Ñ-ÑÐ¾Ð´Ðµ Ð¿ÐµÑÐ¸, Ð° ÑÐ°Ðº Ð¶Ðµ Ð´Ð»Ñ Ð¿ÐµÑÐµÐ³ÑÐµÐ²Ð° Ð½Ð°ÑÑÑÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð°ÑÐ° Ð¿ÑÐ¾Ð¼ÐµÐ¶ÑÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð² Ð·Ð¼ÐµÐµÐ²Ð¸ÐºÐµ Ð·Ð¾Ð½Ñ ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð¸ Ð´Ð¾ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÑ 280 â.
description: This work is contain the development of the technological process of Assembly, welding and control of the convective coil of the visbreaking furnace, vertical with horizontal tubular coils in the convection zone and vertical coils in the radiation zone.
The furnace is designed for heating the tar of the visbreaking unit in series in convection and radiation coils to a temperature of 460 â at the furnace outlet, as well as for overheating the saturated steam of the intermediate pressure in the convection zone coil to a temperature of 280 â
Tecniche di rilassamento per i bambini della scuola dell’infanzia
Creators: name: Tavoli, Aline
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2017

description: Le tecniche di rilassamento sono oggi strategie con solide basi scientifiche e comprovata affidabilità, che aiutano le persone a perseguire una condizione di benessere. Lo scopo della ricerca è quello di appurare se l’adozione di tecniche di rilassamento, durante l’arco dell’anno scolastico favorisca un clima di classe rilassato, nel quale i bambini possono mettere in atto competenze sociali ed educative per uno sviluppo armonioso del proprio essere. Per il raggiungimento dello scopo, ho intervistato alcune docenti della scuola dell’infanzia e ho svolto delle osservazioni sul campo per avere una visione più ampia della situazione. La raccolta dei dati, attraverso interviste e strumenti di osservazione liberi e strutturati, ha confermato che adottando delle tecniche di rilassamento nell’arco di una giornata scolastica il clima di classe è più rilassato. Non sempre c’è relazione immediata tra l’adozione di una tecnica di rilassamento e l’ambiente, a volte bisogna applicare differenti strategie, a dipendenza in particolare dallo stato emozionale dei bambini e dalla reazione che mettono in atto. Tuttavia i risultati ottenuti confermerebbero che le tecniche di rilassamento hanno un impatto positivo reale sia sui bambini sia sulle docenti, apportando benefici sia a livello personale che di gruppo.
Quantum Enhancement of the Zero-Area Sagnac Interferometer Topology for Gravitational Wave Detection
Creators: name: Eberle, Tobias
name: Steinlechner, Sebastian
name: Bauchrowitz, Jöran
name: Händchen, Vitus
name: Vahlbruch, Henning
name: Mehmet, Moritz
name: Müller-Ebhardt, Helge
name: Schnabel, Roman
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Only a few years ago, it was realized that the zero-area Sagnac interferometer topology is able to perform quantum nondemolition measurements of position changes of a mechanical oscillator. Here, we experimentally show that such an interferometer can also be efficiently enhanced by squeezed light. We achieved a nonclassical sensitivity improvement of up to 8.2 dB, limited by optical loss inside our interferometer. Measurements performed directly on our squeezed-light laser output revealed squeezing of 12.7 dB. We show that the sensitivity of a squeezed-light enhanced Sagnac interferometer can surpass the standard quantum limit for a broad spectrum of signal frequencies without the need for filter cavities as required for Michelson interferometers. The Sagnac topology is therefore a powerful option for future gravitational-wave detectors, such as the Einstein Telescope, whose design is currently being studied.
description: 4 pages, 4 figures
ISW-LSS cross-correlation in coupled Dark Energy models with massive neutrinos
Creators: name: Mainini, Roberto
name: Mota, David F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We provide an exhaustive analysis of the Integrated Sach-Wolfe effect (ISW) in the context of coupled Dark Energy cosmologies where a component of massive neutrinos is also present. We focus on the effects of both the coupling between Dark Matter and Dark Energy and of the neutrino mass on the cross-correlation between galaxy/quasar distributions and ISW effect. We provide a simple expression to appropriately rescale the galaxy bias when comparing different cosmologies. Theoretical predictions of the cross-correlation function are then compared with observational data. We find that, while it is not possible to distinguish among the models at low redshifts, discrepancies between coupled models and $Λ$CDM increase with $z$. In spite of this, current data alone seems not able to distinguish between coupled models and $Λ$CDM. However, we show that upcoming galaxy surveys will permit tomographic analysis which allow to better discriminate among the models. We discuss the effects on cross-correlation measurements of ignoring galaxy bias evolution, b(z), and magnification bias correction and provide fitting formulae for b(z) for the cosmologies considered. We compare three different tomographic schemes and investigate how the expected signal to noise ratio, snr, of the ISW-LSS cross-correlation changes when increasing the number of tomographic bins. The dependence of snr on the area of the survey and the survey shot noise is also discussed.
description: 18 pages, 23 figures. Several major extensions. New sections and figures was added. ApJ in print
The Power of Poincaré: Elucidating the Hidden Symmetries in Focal Conic Domains
Creators: name: Alexander, Gareth P.
name: Chen, Bryan Gin-ge
name: Matsumoto, Elisabetta A.
name: Kamien, Randall D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Focal conic domains are typically the "smoking gun" by which smectic liquid crystalline phases are identified. The geometry of the equally-spaced smectic layers is highly generic but, at the same time, difficult to work with. In this Letter we develop an approach to the study of focal sets in smectics which exploits a hidden Poincaré symmetry revealed only by viewing the smectic layers as projections from one-higher dimension. We use this perspective to shed light upon several classic focal conic textures, including the concentric cyclides of Dupin, polygonal textures and tilt-grain boundaries.
description: 4 pages, 3 included figures
Node Classification in Social Networks
Creators: name: Bhagat, Smriti
name: Cormode, Graham
name: Muthukrishnan, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: When dealing with large graphs, such as those that arise in the context of online social networks, a subset of nodes may be labeled. These labels can indicate demographic values, interest, beliefs or other characteristics of the nodes (users). A core problem is to use this information to extend the labeling so that all nodes are assigned a label (or labels). In this chapter, we survey classification techniques that have been proposed for this problem. We consider two broad categories: methods based on iterative application of traditional classifiers using graph information as features, and methods which propagate the existing labels via random walks. We adopt a common perspective on these methods to highlight the similarities between different approaches within and across the two categories. We also describe some extensions and related directions to the central problem of node classification.
description: To appear in Social Network Data Analytics (Springer) Ed. Charu Aggarwal, March 2011
Information literacy per l'orientamento scolastico e professionale: sviluppare le competenze degli utenti nella ricerca di informazioni su professioni e formazioni
Creators: name: Truaisch, Alessandra
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2020

description: È ormai da decenni che il concetto di information literacy è oggetto di studio nel campo delle scienze dell’educazione e in quello biblioteconomico. Le varie definizioni mettono in luce l’importanza, per ogni individuo, di acquisire le competenze necessarie per cercare le informazioni di cui ha bisogno e usarle per fare scelte consapevoli. Sulla base dei principali studi sull’argomento, che il più delle volte si riferiscono all’ambito scolastico o universitario, con questo lavoro di diploma si vuole estendere la riflessione a un altro tipo di ricerca, più personale, che quasi tutti sono portati a svolgere già dall’adolescenza: quella sulle professioni e le formazioni. Se il ruolo dei bibliotecari nell’educazione alla ricerca documentale è stato più volte delineato, lo stesso non si può dire di quello dei documentalisti che lavorano in settori più specializzati, come quello dell’orientamento scolastico e professionale, ma che sono altrettanto coinvolti nella mediazione tra le fonti d’informazione e l’utenza. Nella parte teorica quindi, dopo una breve ricapitolazione degli elementi di information literacy che sono serviti da spunto per il resto del lavoro, viene analizzato il ruolo dei documentalisti all’interno di un’azienda o di un’istituzione, in particolare presso il Servizio documentazione dell’Ufficio dell’orientamento scolastico e professionale (UOSP). In seguito, la riflessione si focalizza sui possibili benefici di un’adeguata educazione alla ricerca e all’uso delle fonti d’informazione sulle professioni e le formazioni. Benefici non solo per i partecipanti, ma anche per i documentalisti e gli orientatori dell’UOSP. Nella parte pratica sono proposti dei corsi di information literacy destinati a tre diversi tipi di utenza: gli allievi di scuola media, quelli delle scuole medie superiori e gli adulti. L’obiettivo è quello di rendere i partecipanti più consapevoli delle numerose possibilità che offre il sistema educativo svizzero e di insegnare loro a svolgere delle ricerche autonomamente di modo che, una volta raccolte le prime informazioni, essi possano beneficiare il più possibile del supporto degli specialisti dell’orientamento. Relatrice: Beatrice Tognola-Giudicetti.
Formation of Massive Black Holes in Dense Star Clusters. II. IMF and Primordial Mass Segregation
Creators: name: Goswami, Sanghamitra
name: Umbreit, Stefan
name: Bierbaum, Matt
name: Rasio, Frederic A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A promising mechanism to form intermediate-mass black holes (IMBHs) is the runaway merger in dense star clusters, where main-sequence stars collide and form a very massive star (VMS), which then collapses to a black hole. In this paper we study the effects of primordial mass segregation and the importance of the stellar initial mass function (IMF) on the runaway growth of VMSs using a dynamical Monte Carlo code for N-body systems with N as high as 10^6 stars. Our code now includes an explicit treatment of all stellar collisions. We place special emphasis on the possibility of top-heavy IMFs, as observed in some very young massive clusters. We find that both primordial mass segregation and the shape of the IMF affect the rate of core collapse of star clusters and thus the time of the runaway. When we include primordial mass segregation we generally see a decrease in core collapse time (tcc). Moreover, primordial mass segregation increases the average mass in the core, thus reducing the central relaxation time, which also decreases tcc. The final mass of the VMS formed is always close to \sim 10^-3 of the total cluster mass, in agreement with the previous studies and is reminiscent of the observed correlation between the central black hole mass and the bulge mass of the galaxies. As the degree of primordial mass segregation is increased, the mass of the VMS increases at most by a factor of 3. Flatter IMFs generally increase the average mass in the whole cluster, which increases tcc. For the range of IMFs investigated in this paper, this increase in tcc is to some degree balanced by stellar collisions, which accelerate core collapse. Thus there is no significant change in tcc for the somewhat flatter global IMFs observed in very young massive clusters.
description: Accepted for publication in ApJ
A glimpse inside the mathematical kitchen
Creators: name: Arias-de-Reyna, Juan
name: van de Lune, Jan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26D05 26D15 (primary), 42A05 (secondary)

description: We prove the inequality sum_{k=1}^infty (-1)^{k+1} r^k cos(k*phi) (k+2)^{-1} < sum_{k=1}^infty(-1)^{k+1} r^k (k+2)^{-1} for 0 < r <= 1 and 0 < phi < pi. For the case r = 1 we give two proofs. The first one is by means of a general numerical technique (maximal slope principle) for proving inequalities between elementary functions. The second proof is fully analytical. Finally we prove a general rearrangement theorem and apply it to the remaining case 0 < r < 1. Some of these inequalities are needed for obtaining general sharp bounds for the errors committed when applying the Riemann-Siegel expansion of Riemann's zeta function.
description: 14 pages, 2 figures
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð·Ð°Ñ Ð²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° Ð´Ð»Ñ Ð¼Ð°Ð½Ð¸Ð¿ÑÐ»ÑÑÐ¾ÑÐ° Ñ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¼ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð·Ð°Ñ Ð²Ð°ÑÑÐ²Ð°ÐµÐ¼Ð¾Ð³Ð¾ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Development of a gripper device with the ability to use exchangeable grab tool
Creators: name: ÐÐ»Ð°ÑÐµÐ½ÐºÐ¾, ÐÐ½ÑÐ¾Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð Ð¾Ð±Ð¾ÑÑ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½ÑÐµ
Ð Ð¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ¸ÑÑÐµÐ¼Ñ
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description: Ð urpose of the project is the development of a manipulator with the possibility of using interchangeable tool modules on small robotic platform. In the work conducted an analytical overview and comparison of existing manipulators and end devices, identify their advantages and disadvantages. On the basis of the task requirements and review formed arm requirements and capture device. Conducted a preliminary calculation, on the basis of which it is composed and scheme of gripper device. To ensure efficiency in the simulation of technological operations. Results for control of Manipulator. Developed and described the design of the manipulator and gripper device.
Discrete Partitioning and Coverage Control for Gossiping Robots
Creators: name: Durham, Joseph W.
name: Carli, Ruggero
name: Frasca, Paolo
name: Bullo, Francesco
Publisher: name: arXiv
Year: 2010
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: We propose distributed algorithms to automatically deploy a team of mobile robots to partition and provide coverage of a non-convex environment. To handle arbitrary non-convex environments, we represent them as graphs. Our partitioning and coverage algorithm requires only short-range, unreliable pairwise "gossip" communication. The algorithm has two components: (1) a motion protocol to ensure that neighboring robots communicate at least sporadically, and (2) a pairwise partitioning rule to update territory ownership when two robots communicate. By studying an appropriate dynamical system on the space of partitions of the graph vertices, we prove that territory ownership converges to a pairwise-optimal partition in finite time. This new equilibrium set represents improved performance over common Lloyd-type algorithms. Additionally, we detail how our algorithm scales well for large teams in large environments and how the computation can run in anytime with limited resources. Finally, we report on large-scale simulations in complex environments and hardware experiments using the Player/Stage robot control system.
description: Accepted to IEEE TRO. 14 double-column pages, 10 figures. v2 is a thorough revision of v1, including new algorithms and revised mathematical and simulation results
Chemical signature of gas-rich disc-disc mergers at high redshift
Creators: name: Martel, Hugo
name: Richard, Simon
name: brook, Chris B.
name: Kawata, Daisuke
name: Gibson, Brad K.
name: Sánchez-Blázquez, Patricia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We performed numerical simulations of mergers between gas-rich disc galaxies, which result in the formation of late-type galaxies. Stars formed during the merger end up in a thick disc that is partially supported by velocity dispersion and has high [alpha/Fe] ratios at all metallicities. Stars formed later end up in a thin, rotationally supported disc which has lower [alpha/Fe] ratios. While the structural and kinematical properties of the merger remnants depend strongly upon the orbital parameters of the mergers, we find a clear chemical signature of gas-rich mergers.
description: 5 pages, 5 figures, IAU symposium No. 277 : Tracing the Ancestry of Galaxies
Effects of heatwaves on key ecological processes structuring early successional tidepool communities
Creators: name: Konecny, Cassandra Angelica
Publisher: name: University of British Columbia
Year: 2020

description: With climate change, we are seeing an increase in mean temperatures globally. Perhaps of greater concern, however, is the associated increase in the frequency, magnitude, and duration of heat wave events. Through mass die offs, coral bleaching, and species range expansions and contractions, heatwaves have had large impacts on marine ecosystem and their function. While we have an understanding of how communities have been altered by naturally occurring heatwaves, we have little understanding of what factors are important in determining the response of a system to extreme heat events. In order to better predict the response of marine ecosystems to extreme heat events we must understand how extreme temperatures interact with key ecological processes. The goal of this thesis was to determine how heatwaves, in conjunction with key ecological processes, such as herbivory and dominant foundation species, alter community composition and function. I tested this using artificial tidepools in Burrard Inlet, British Columbia as a study system and manipulated temperature in situ through the design of a novel temperature manipulation system: the SAUTE. In chapter 2, I test how regular heat events of different intensities and herbivore density affect community composition through a 2-month field manipulation. My results demonstrate that tidepool communities in the Pacific Northwest may not be impacted directly by regular increases in maximum daily temperatures by 2-4ºC throughout the summer, but that indirect effects through the loss of herbivore grazers could have impacts on community composition. In chapter 3, I ask how a late summer, longer duration heatwave influences community composition in tidepools and if this effect is dependent on the dominant foundation species present. The data that I present suggests that, though there were few direct impacts the heatwave on tidepool assemblages, the dominant foundation species was an important determinant of community composition and diversity. While I only observed a slight decrease in the abundance of foundation species with heating, if extreme heat events modify ecological processes, such as herbivory, that create and allow different habitat types to persist, then they could have large indirect effects on tidepool communities.
A description of n-ary semigroups polynomial-derived from integral domains
Creators: name: Marichal, Jean-Luc
name: Mathonet, Pierre
Publisher: name: arXiv
Year: 2010
Subjects: subject: Rings and Algebras (math.RA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N15

description: We provide a complete classification of the n-ary semigroup structures defined by polynomial functions over infinite commutative integral domains with identity, thus generalizing Głazek and Gleichgewicht's classification of the corresponding ternary semigroups.
LIM e geografia: binomio perfetto?
Creators: name: Tanzi, Filippo
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2013

description: Questo lavoro di diploma presenta uno studio effettuato in due prime medie presso la Scuola Media di Pregassona (Lugano) durante alcune lezioni di geografia. In una classe si è deciso di utilizzare a più riprese la Lavagna Interattiva Multimediale (LIM), mentre nella seconda classe si è utilizzata la tradizionale lavagna d’ardesia. L’intento del lavoro è stato quello di analizzare l’impatto della LIM sulle lezioni di geografia, e in particolare nel processo di costruzione dei coremi. L’analisi si è basata sui dati ottenuti da quattro strumenti di ricerca: un diario semi-strutturato, la cui funzione è stata quella di memoria selettiva di quanto osservato, delle riprese video, che mi hanno permesso di osservare il coinvolgimento degli allievi, una griglia di osservazione in classe, la cui funzione è stata quella di analizzare la dinamicità della lezione, ed infine una prova di valutazione non annunciata, che mi ha permesso di verificare l’apprendimento dei ragazzi. Lo studio ha evidenziato che con una buona preparazione da parte del docente le lezioni risultano molto dinamiche e ricche di stimoli, facilitando il coinvolgimento dei ragazzi. La LIM si è dimostrata positiva per il processo di costruzione e archiviazione dei coremi, favorendo la possibilità di relazionarli tra loro. Lo studio ha evidenziato inoltre dei limiti nella praticità di disegnare e scrivere con la LIM, in gran parte dovuti al software necessario per alcuni modelli. Relatori: Luca Botturi, Pamela Küng. Materia: geografia
“È ora di andare nel bosco”: giochi svolti ed emozioni provate dai bambini della scuola dell’infanzia
Creators: name: Bianchi, Simona
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2013

description: Il duplice scopo di questa ricerca è da un lato individuare quali giochi svolgono i bambini nel bosco e dall’altro scoprire quali emozioni realmente provano i bambini della scuola dell’infanzia quando si trovano in questo luogo. Per mezzo di interviste semi-strutturate e con il supporto di immagini raffiguranti le emozioni fondamentali, i bambini hanno avuto modo di riconoscere ed esprimere la loro emozione e in seguito di raccontare quanto da loro fatto. Per ciò che concerne i giochi svolti i dati mostrano come il bosco, grazie alla massiccia presenza di materiali, favorisce i giochi simbolici e i giochi di scoperta. Inoltre l’ambiente viene sfruttato per i giochi motori. Gli altri dati raccolti rivelano che sia andare nel bosco sia giocare in questo luogo provoca emozioni. In entrambi i casi la maggior parte di queste risulta essere di stampo piacevole, seppur non è da dimenticare che vi sono degli elementi che possono far provare ai bambini delle emozioni spiacevoli, quali il contatto con i materiali naturali o il bosco con la presenza di incertezze e animali. Dal confronto tra questi dati emerge che fra il prima e il dopo gioco libero vi è un cambiamento di motivazioni delle emozioni. Inizialmente il 57% delle giustificazioni considera unicamente il luogo e le sue condizioni; dopo aver giocato il 77% delle risposte tiene conto di fattori misti quali il bosco, i materiali, il gioco e le relazioni interpersonali. Relatore: Alejandro Arigoni
Fourier-Mukai partners of canonical covers of bielliptic and Enriques surfaces
Creators: name: Sosna, Pawel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove that the canonical cover of an Enriques surface does not admit non-trivial Fourier-Mukai partners. We also show that the canonical cover of a bielliptic surface has at most one non-isomorphic Fourier-Mukai partner. The first result is then applied to birational Hilbert schemes of points and the second to birational generalised Kummer varieties. An appendix establishes that there are no exceptional or spherical objects in the derived category of a bielliptic surface.
description: 10 pages; v2: corrected a reference and some typos
Uniquely constructed figures
Creators: name: Petrunin, Anton
name: Rukshin, Serge
Publisher: name: arXiv
Year: 2010
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52Cxx

description: A convex figures F is called uniquely constructed if it satisfies the following condition: if F equidecomposable to a convex figure G then F is congruent to G. We classify all convex uniquely constructed figures. The paper written primary for school students.
description: 13 pages, 7 figures, Russian
From planetesimals to terrestrial planets: N-body simulations including the effects of nebular gas and giant planets
Creators: name: Morishima, Ryuji
name: Stadel, Joachim
name: Moore, Ben
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present results from a suite of N-body simulations that follow the accretion history of the terrestrial planets using a new parallel treecode that we have developed. We initially place 2000 equal size planetesimals between 0.5--4.0 AU and the collisional growth is followed until the completion of planetary accretion (> 100 Myr). All the important effect of gas in laminar disks are taken into account: the aerodynamic gas drag, the disk-planet interaction including Type I migration, and the global disk potential which causes inward migration of secular resonances as the gas dissipates. We vary the initial total mass and spatial distribution of the planetesimals, the time scale of dissipation of nebular gas, and orbits of Jupiter and Saturn. We end up with one to five planets in the terrestrial region. In order to maintain sufficient mass in this region in the presence of Type I migration, the time scale of gas dissipation needs to be 1-2 Myr. The final configurations and collisional histories strongly depend on the orbital eccentricity of Jupiter. If today's eccentricity of Jupiter is used, then most of bodies in the asteroidal region are swept up within the terrestrial region owing to the inward migration of the secular resonance, and giant impacts between protoplanets occur most commonly around 10 Myr. If the orbital eccentricity of Jupiter is close to zero, as suggested in the Nice model, the effect of the secular resonance is negligible and a large amount of mass stays for a long period of time in the asteroidal region. With a circular orbit for Jupiter, giant impacts usually occur around 100 Myr, consistent with the accretion time scale indicated from isotope records. However, we inevitably have an Earth size planet at around 2 AU in this case. It is very difficult to obtain spatially concentrated terrestrial planets together with very late giant impacts.
description: 51 pages, 19 figures, 2 tables, published in Icarus
Robust estimation and variable selection in high-dimensional linear regression models
Creators: name: Kepplinger, David
Publisher: name: University of British Columbia
Year: 2020

description: Linear regression models are commonly used statistical models for predicting a response from a set of predictors. Technological advances allow for simultaneous collection of many predictors, but often only a small number of these is relevant for prediction. Identifying this set of predictors in high-dimensional linear regression models with emphasis on accurate prediction is thus a common goal of quantitative data analyses. While a large number of predictors promises to capture as much information as possible, it bears a risk of containing contaminated values. If not handled properly, contamination can affect statistical analyses and lead to spurious scientific discoveries, jeopardizing the generalizability of findings. In this dissertation I propose robust regularized estimators for sparse linear regression with reliable prediction and variable selection performance under the presence of contamination in the response and one or more predictors. I present theoretical and extensive empirical results underscoring that the penalized elastic net S-estimator is robust towards aberrant contamination and leads to better predictions for heavy tailed error distributions than competing estimators. Especially in these more challenging scenarios, competing robust methods reliant on an auxiliary estimate of the residual scale, are more affected by contamination due to the high finite-sample bias introduced by regularization. For improved variable selection I propose the adaptive penalized elastic net S-estimator. I show this estimator identifies the truly irrelevant predictors with high probability as sample size increases and estimates the parameters of the truly relevant predictors as accurately as if these relevant predictors were known in advance. For practical applications robustness of variable selection is essential. This is highlighted by a case study for identifying proteins to predict stenosis of heart vessels, a sign of complication after cardiac transplantation. High robustness comes at the price of more taxing computations. I present optimized algorithms and heuristics for feasible computation of the estimates in a wide range of applications. With the software made publicly available, the proposed estimators are viable alternatives to non-robust methods, supporting discovery of generalizable scientific results.
Tensile Forces and Shape Entropy Explain Observed Crista Structure in Mitochondria
Creators: name: Ghochani, M.
name: Nulton, J. D.
name: Salamon, P.
name: Frey, T. G.
name: Rabinovitch, A.
name: Baljon, A. R. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: A model is presented from which the observed morphology of the inner mitochondrial membrane can be inferred as minimizing the system's free energy. Besides the usual energetic terms for bending, surface area, and pressure difference, our free energy includes terms for tension that we believe to be exerted by proteins and for an entropic contribution due to many dimensions worth of shapes available at a given energy. In order to test the model, we measured the structural features of mitochondria in HeLa cells and mouse embryonic fibroblasts using 3D electron tomography. Such tomograms reveal that the inner membrane self-assembles into a complex structure that contains both tubular and flat lamellar crista components. This structure, which contains one matrix compartment, is believed to be essential to the proper functioning of mitochondria as the powerhouse of the cell. We find that tensile forces of the order of 10 pN are required to stabilize a stress-induced coexistence of tubular and flat lamellar cristae phases. The model also predicts \Deltap = -0.036 \pm 0.004 atm and σ=0.09 \pm 0.04 pN/nm.
Competing activation mechanisms in epidemics on networks
Creators: name: Castellano, Claudio
name: Pastor-Satorras, Romualdo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In contrast to previous common wisdom that epidemic activity in heterogeneous networks is dominated by the hubs with the largest number of connections, recent research has pointed out the role that the innermost, dense core of the network plays in sustaining epidemic processes. Here we show that the mechanism responsible of spreading depends on the nature of the process. Epidemics with a transient state are boosted by the innermost core. Contrarily, epidemics allowing a steady state present a dual scenario, where either the hub independently sustains activity and propagates it to the rest of the system, or, alternatively, the innermost network core collectively turns into the active state, maintaining it globally. In uncorrelated networks the former mechanism dominates if the degree distribution decays with an exponent larger than 5/2, and the latter otherwise. Topological correlations, rife in real networks, may perturb this picture, mixing the role of both mechanisms.
description: 32 pages, 10 figures
Voter model with non-Poissonian interevent intervals
Creators: name: Takaguchi, Taro
name: Masuda, Naoki
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Recent analysis of social communications among humans has revealed that the interval between interactions for a pair of individuals and for an individual often follows a long-tail distribution. We investigate the effect of such a non-Poissonian nature of human behavior on dynamics of opinion formation. We use a variant of the voter model and numerically compare the time to consensus of all the voters with different distributions of interevent intervals and different networks. Compared with the exponential distribution of interevent intervals (i.e., the standard voter model), the power-law distribution of interevent intervals slows down consensus on the ring. This is because of the memory effect; in the power-law case, the expected time until the next update event on a link is large if the link has not had an update event for a long time. On the complete graph, the consensus time in the power-law case is close to that in the exponential case. Regular graphs bridge these two results such that the slowing down of the consensus in the power-law case as compared to the exponential case is less pronounced as the degree increases.
description: 18 pages, 8 figures
Population intervention effects in observational studies to emulate target trial results: Reconciling the effects of improved sanitation on child growth
Creators: name: Benjamin-Chung, J.
name: Arnold, B.F.
name: Westreich, D.
name: Rogawski McQuade, E.T.
Publisher: name: Oxford University Press
Year: 2022

description: Background: Improved sanitation has been associated with improved child growth in observational studies, but multiple randomized trials that delivered improved sanitation found no effect on child growth. We assessed to what extent differences in the effect estimated in the two study designs (the effect of treatment in observational studies and the effect of treatment assignment in trials) could explain the contradictory results. Methods: We used parametric g-computation in five prospective studies (n = 21 524) and 59 cross-sectional Demographic and Health Surveys (DHS; n = 158 439). We compared the average treatment effect (ATE) for improved sanitation on mean length-for-age z-score (LAZ) among children aged <2 years to population intervention effects (PIEs), which are the observational analogue of the effect estimated in trials in which some participants are already exposed. Results: The ATE was >0.15 z-scores, a clinically meaningful difference, in most prospective studies but in <20% of DHS surveys. The PIE was always smaller than the ATE, and the magnitude of difference depended on the baseline prevalence of the improved sanitation. Interventions with suboptimal coverage and interventions delivered in populations with higher mean LAZ had a smaller effect on population-level LAZ. Conclusions: Estimates of PIEs corresponding to anticipated trial results were often smaller than clinically meaningful effects. Incongruence between observational associations and null trial results may in part be explained by expected differences between the effects estimated. Using observational ATEs to set expectations for trials may overestimate the impact that sanitation interventions can achieve. PIEs predict realistic effects and should be more routinely estimated.
Interlaced particle systems and tilings of the Aztec diamond
Creators: name: Fleming, Benjamin J.
name: Forrester, Peter J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Motivated by the problem of domino tilings of the Aztec diamond, a weighted particle system is defined on $N$ lines, with line $j$ containing $j$ particles. The particles are restricted to lattice points from 0 to $N$, and particles on successive lines are subject to an interlacing constraint. It is shown that marginal distributions for this particle system can be computed exactly. This in turn is used to give unified derivations of a number of fundamental properties of the tiling problem, for example the evaluation of the number of distinct configurations and the relation to the GUE minor process. An interlaced particle system associated with the domino tiling of a certain half Aztec diamond is similarly defined and analyzed.
description: 17 pages, 4 figures