cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Enigma of ultraluminous X-ray sources may be resolved by 3D-spectroscopy (MPFS data)
Creators: name: Fabrika, S.
name: Abolmasov, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The ultraluminous X-ray sources (ULXs) were isolated in external galaxies for the last 5 years. Their X-ray luminosities exceed 100-10000 times those of brightest Milky Way black hole binaries and they are extremely variable. There are two models for the ULXs, the best black hole candidates. 1. They are supercritical accretion disks around a stellar mass black hole like that in SS433, observed close to the disk axes. 2. They are Intermediate Mass Black Holes (of 100-10000 solar masses). Critical observations which may throw light upon the ULXs nature come from observations of nebulae around the ULXs. We present results of 3D-spectroscopy of nebulae around several ULXs located in galaxies at 3-6 Mpc distances. We found that the nebulae to be powered by their central black holes. The nebulae are shocked and dynamically perturbed probably by jets. The nebulae are compared with SS433 nebula (W50).
description: Proceedings of the ESO and Euro3D Workshop "Science Perspectives for 3D Spectroscopy", Garching (Germany), October 10-14, 2005. M. Kissler-Patig, M.M. Roth and J.R. Walsh (eds.)
ORDERED-PHASES OF ASYMMETRIC AB-BLOCK COPOLYMER MELTS CONFINED INTO CIRCULAR ANNULAR DISCS: A COMPUTATIONAL STUDY
Creators: name: MUHAMMAD JAVED IQBAL
name: INAYATULLAH SOOMRO
name: USAMA GULZAR
name: MUHAMMAD SALMAN JAVED
Publisher: name: Zenodo
Year: 2024
Subjects: Numerical Solutions of PDEs, Finite Difference Method, Polar Mesh System, Discretization, Soft Materials, Nanotechnology, Diblock Copolymers, Cell Dynamics Simulation, Confinement.

description: Abstract

Over the past decade, nanotechnology has set the industrial world on a new development path. Experimental and theoretical scientists are interested in discovering new structures of soft materials with potential applications in nanotechnology, including nanoporous storage media, fabrication for nanoelectronics, soft robotics, energy harvesting, and biomedical. Mathematicians are predicting novel morphologies of diblock copolymer systems through mathematical modelling and computer simulations studying nanostructures in the presence of a surface field, which leads to the identification of new dimensions of melt. Confinement improves the frustration in nanostructures and leads to new patterns of nanoparticles. The computational study of novel nanostructures is done through simulation models. The cell dynamic simulation model provides large-scale simulations of nanomaterials quickly and efficiently. This computational investigation confines lamellar, cylindrical, and spherical structures into asymmetric diblock copolymers fA≠ fB in circular annular discs. For the simulations requirement of this model, the continuum macromolecule of the diblock copolymers system is discretized on a 17-point isotropic stencil to approximate the Laplacian in a polar mesh. FORTRAN codes have been developed for the PDEs included in the model. The simulation results are visualized with Open Dx.
Influence of substrate-induced thermal stress on the superconducting properties of V3Si thin films
Creators: name: Vethaak, Tom Doekle
name: Gustavo, Frederic
name: Farjot, Thierry
name: Kubart, Tomas
name: Gergaud, Patrice
name: Zhang, Shi-Li
name: Nemouchi, Fabrice
name: Lefloch, François
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thin films of superconducting V$_3$Si were prepared by means of RF sputtering from a compound V$_3$Si target at room temperature onto sapphire and oxide-coated silicon wafers, followed by rapid thermal processing under secondary vacuum. The superconducting properties of the films thus produced are found to improve with annealing temperature, which is ascribed to a reduction of defects in the polycrystalline layer. Critical temperatures ($T_\text{c}$) up to $15.3\,$K were demonstrated after thermal processing, compared to less than $1\,$K after deposition. The $T_\text{c}$ was found to always be lower on the silicon wafers, by on average $1.9(3)\,$K for the annealed samples. This difference, as well as a broadening of the superconducting transitions, is nearly independent of the annealing conditions. In-situ XRD measurements reveal that the silicide layer becomes strained upon heating due to a mismatch between the thermal expansion of the substrate and that of V$_3$Si. Taking into account the volume reduction due to crystallization, this mismatch is initially larger on sapphire, though stress relaxation allows the silicide layer to be in a relatively unstrained state after cooling. On oxidized silicon however, no clear evidence of relaxation upon cooling is observed, and the V$_3$Si ends up with an out-of-plane strain of 0.3\% at room temperature. This strain increases as the sample is cooled down to cryogenic temperatures, though the deformation of the polycrystalline layer is expected to be highly inhomogeneous. Taking into account also the reported occurrence of a Martensitic transition just above the critical temperature, this extrapolated strain distribution is found to closely match an existing model of the strain dependence of A-15 superconducting compounds.
description: 7 pages, 5 figures
Integrability Criterion for Abelian Extensions of Lie Groups
Creators: name: Hekmati, Pedram
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 22E65, 20K35

description: We establish a criterion for when an abelian extension of infinite-dimensional Lie algebras integrates to a corresponding Lie group extension $\hat{G}$ of $G$ by $A$, where $G$ is a connected, simply connected Lie group and $A$ is a quotient of its Lie algebra by some discrete subgroup. When $G$ is non-simply connected, the kernel $A$ is replaced by a central extension $\hat{A}$ of $π_1(G)$ by $A$.
description: 11 pages, 2 figures
Assessing identity intersectionality in adolescents and emerging adults. A theoretical and methodological model
Creators: name: Picariello, Simona
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Current identity literature is extremely fragmented, where subfields of identity often "talk past" each other and pay little or no attention to one another (Schwartz, 2001; Schwartz, Luyckx, & Vignoles, 2011). As a result, the concept of "identity" has been assigned multiple meanings across literatures, and integrating these various meanings has rarely been attempted (Vignoles, Schwartz, & Luyckx, 2011). To a certain extent, the presence of different identity literatures focusing on disparate aspects of the identity construct (e.g., personal goals, life stories, interpersonal relationships, group memberships, et cetera) might be considered as an advantage. Indeed, integrating aspects of the various perspectives would create a whole that is larger and more inclusive than any of the individual perspectives.
The present research was designed as an attempt to integrate aspects of various theoretical and empirical perspectives on identity construction in adolescence and emerging adulthood, since the development of identity is considered as consisting of a process of integration across the various relational contexts in which one functions, through adaptive mechanisms activated by the individual (Bosma & Kunnen, 2001). Such a theoretical model, also inspired by the intersectionality paradigm, has been defined in this work as "cross-contexts-domains model", and it constitutes the basis on which a novel identity measure has been developed: the Identity Labels and Life Contexts Questionnaire (ILLCQ).
Indeed, the ILLCQ was constructed to answer some core questions: "How can we assess the complex interplay between identity dimensions and life contexts?", "What would be the best analytical method to study this kind of data?", and "How can we use results obtained?". The complexity of these questions is reflected in the complexity of the ILLCQ structure, which could not be analyzed through classical analysis strategies used in scale development.
The measure was constructed through a pilot study, then underwent to a trial paper-and-pencil administration, and finally it was administrated online to 646 Italian and US adolescents and emerging adults. Results demonstrated that the ILLCQ is adequate to assess the cross-contexts-domains model, providing interesting information about how much and how individuals manage the balance between keeping an internal coherence in their identity, and adjusting to external requests coming from relational contexts (Bosma & Kunnen, 2001; Erikson, 1950).
Vuoti di memoria. Sullo spazio in architettura
Creators: name: Balzano, Daniele
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Questo lavoro di dottorato offre uno sguardo sullo spazio architettonico, una perlustrazione non necessariamente cronologica di architetture, forme fissate dall'uomo, vuoti che nella loro lenta definizione hanno acquisito un nome, qualificandosi nella loro sostanza spaziale in relazione al modo in cui si fissano nella memoria collettiva.

Il vuoto, sostanza spaziale dell'architettura, è indagato sia come volume definito nella sua natura di invaso in rapporto a un involucro, sia costituito attraverso elementi architettonici che lo definiscono, dandogli forma e dimensione.
L'invaso spaziale, come vuoto unitario, rinvia al suo involucro, ma il vuoto si presenta anche autonomamente, senza la presenza di involucri riconducibili all'idea di scatola muraria, bensì come spazialità precisata dagli elementi che lo compongono e lo identificano.

La scelta del termine vuoto è legata all'indicazione di una qualità dello spazio, che si definisce, si chiarisce, si determina e si costruisce nel suo opposto: il pieno. Precisando che spazio e vuoto saranno in genere utilizzati come sinonimi.
Il ragionamento sul vuoto e sulla memoria delle forme, viene riferito all'intero complesso dell'architettura, non separando la parte tecnico – compositiva dal suo senso.
Il vuoto, infatti, mette in relazione il corpo dell'uomo con la rappresentazione fisica dell'architettura dentro cui è impressa la memoria, non più all'interno della scatola muraria ma nella misura di quegli spazi e di quelle relazioni. Con il termine memoria si compie  il passaggio al corpo fisso dell'architettura nella sua relazione spaziale: il corpo connota lo spazio dandogli senso.

Queste riflessioni sullo spazio in architettura, sono nate nel corso della tesi di laurea, intitolata analogamente "Vuoti di memoria". Nel centro storico di Cordova a due passi dalla grande Moschea, il progetto definiva un'architettura partendo dal vuoto urbano, chiarificandone il ruolo: da vuoto interstiziale a vuoto ordinatore.

La ricerca ha avuto successivi momenti di elaborazione:  nella didattica, nello studio del rapporto tra archeologia e architettura, pubblicati in varie occasioni. La prima delle quali è negli Atti del convegno Abitare il futuro, col nome di Vuoti di memoria. Un estratto grafico è stato pubblicato in Scritti scelti per l'architettura della città.

Da queste premesse è sembrato fertile costruire un ragionamento più articolato, provando a rendere intellegibile alcuni aspetti sul vuoto in architettura e le sue ragioni.
Adiabatic Computation - A Toy Model
Creators: name: Ribeiro, P.
name: Mosseri, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We discuss a toy model for adiabatic quantum computation which displays some phenomenological properties expected in more realistic implementations. This model has two free parameters: the adiabatic evolution parameter $s$ and the $α$ parameter which emulates many-variables constrains in the classical computational problem. The proposed model presents, in the $s-α$ plane, a line of first order quantum phase transition that ends at a second order point. The relation between computation complexity and the occurrence of quantum phase transitions is discussed. We analyze the behavior of the ground and first excited states near the quantum phase transition, the gap and the entanglement content of the ground state.
description: 7 pages, 8 figures
Stellar Velocity Dispersion and Dynamical Mass of the Ultra-Diffuse Galaxy NGC 5846_UDG1 from the Keck Cosmic Web Imager
Creators: name: Forbes, Duncan A.
name: Gannon, Jonah S.
name: Romanowsky, Aaron J.
name: Alabi, Adebusola
name: Brodie, Jean P.
name: Couch, Warrick J.
name: Ferre-Mateu, Anna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The ultra-diffuse galaxy in the NGC 5846 group (NGC 5846_UDG1) was shown to have a large number of globular cluster (GC) candidates from deep imaging as part of the VEGAS survey. Recently, Muller et al. published a velocity dispersion, based on a dozen of its GCs. Within their quoted uncertainties, the resulting dynamical mass allowed for either a dark matter free or a dark matter dominated galaxy. Here we present spectra from KCWI which reconfirms membership of the NGC 5846 group and reveals a stellar velocity dispersion for UDG1 of $σ_{GC}$ = 17 $\pm$ 2 km/s. Our dynamical mass, with a reduced uncertainty, indicates a very high contribution of dark matter within the effective radius. We also derive an enclosed mass from the locations and motions of the GCs using the Tracer Mass Estimator, finding a similar mass inferred from our stellar velocity dispersion. We find no evidence that the galaxy is rotating and is thus likely pressure-supported. The number of confirmed GCs, and the total number inferred for the system ($\sim$45), suggest a total halo mass of $\sim2 \times 10^{11}$ M$_{\odot}$. A cored mass profile is favoured when compared to our dynamical mass. Given its stellar mass of 1.1$\times$10$^{8}$ M$_{\odot}$, NGC 5846_UDG1 appears to be an ultra-diffuse galaxy with a dwarf-like stellar mass and an overly massive halo.
description: 6 pages, 5 figures, MNRAS
Orchestration of Logical Resources in Software Defined Infrastructures
Creators: name: Maini, Elisa
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: The diffusion of ultra-broadband (in terms of high bandwidth and low latency) connection, IT hardware advances, and growing availability of open-source software are causing a paradigm shift in the world of network architectures. In the last years, the number of devices and smart-objects connected to the network has grown exponentially and the so-called "machine intelligence'' has become part of the life-cycle of industries, agriculture, smart cities, and eventually public institutions. In this context, the initiative to integrate heterogeneous networks, including wired/wireless networks and smart-objects, from both the service management and control viewpoints is considered a critical aspect of Future Networks. The effect of all these drivers is the so-called "Softwarization" of telco infrastructures, where the approach to this integration is through the deployment of a flexible and programmable network infrastructure supporting software-driven network features that can be instantiated on-demand. These instantiations will be addressing the changing service requirements and resource constraints, yet be scalable across multiple services and multiple domains, can maintain QoS for end-users of a service, and that provide a level of isolation and security from one service to another. Research and development activities are currently clearly focused on several concepts such as programmable networks, network virtualisation, open interfaces and platforms, and increasing the degree of intelligence inside the network. The next generation of Software Defined Infrastructures needs to move from being merely Defined by software to be Driven by software and must be capable of supporting a multitude of players that exploit an environment in which services are dynamically deployed and quickly adapt over a heterogeneous physical infrastructure, according to chaining requirements. One of the main challenges includes the design and the implementation of specific mechanisms for run-time orchestration of logical resources in wired environments. In addition to mechanisms for controlling virtual resources in Software Defined Infrastructures, another challenge includes the design and implementation of specific algorithms for the efficient mapping of virtual resources onto physical resources. This thesis shows how network architectures based on open network features and resources abstraction offers innovative solutions addressing some of the challenges of Future Networks.
Developing Innovative Inertial Systems based on advanced MEMS sensors
Creators: name: Simonetti, Alessandro
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Current technological improvements allow for the realization of MEMS inertial sensors that have several advanced peculiarities such as low production cost, wide bandwidth, high-reliability, small-size, low-power consumption, and lightweight configuration. These advantages combined with new generation MEMS higher levels of accuracy and the development of innovative algorithms is allowing MEMS technology to replace expensive, bulky, heavy and power requiring Fiber Optic Gyroscopes in most applications.
This thesis deals with the development of various innovative MEMS-based inertial systems suitable to accomplish different tasks.
First, a low-cost Inertial Navigation System solution composed of industrial-grade inertial sensors, magnetometer and GNSS antenna/receiver suitable for Unmanned Aircraft Systems applications is shown. Such aeronautical platforms require attitude determination capabilities more enhanced than the standard attitude measurement accuracy FAA requirements.
Then, a land navigator system built around an Inertial Measurement Unit with quasi-tactical level gyroscopes linked with a GNSS equipment and an odometer is exposed. Both civil and military applications are demanding for self-contained, dead-reckoning systems able to provide a continuous and reliable Position, Velocity and Timing solution even in GNSS denied and degraded environments.
Finally, a ZUPT algorithm able to accurately initialize a MEMS-based INS navigation state and north-finding activities employing tactical-grade MEMS gyroscopes are described. Each inertial navigation system shall be accurately initialized before navigation in order to improve its performance. Attitude initialization is the most difficult task to satisfy and heading self-initialization has been not considered possible for many years utilizing MEMS gyroscopes.
Time Crystals in the Driven Transverse Field Ising Model under Quasiperiodic Modulation
Creators: name: Liang, Pengfei
name: Fazio, Rosario
name: Chesi, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the transverse field Ising model subject to a two-step periodic driving protocol and quasiperiodic modulation of the Ising couplings. Analytical results on the phase boundaries associated with Majorana edge modes and numerical results on the localization of single-particle excitations are presented. The implication of a region with fully localized domain-wall-like excitations in the parameter space is eigenstate order and exact spectral pairing of Floquet eigenstates, based on which we conclude the existence of time crystals. We also examine various correlation functions of the time crystal phase numerically, in support of its existence.
description: 9 pages, 4 figures
The time slice axiom in perturbative quantum field theory on globally hyperbolic spacetimes
Creators: name: Chilian, Bruno
name: Fredenhagen, Klaus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The time slice axiom states that the observables which can be measured within an arbitrarily small time interval suffice to predict all other observables. While well known for free field theories where the validity of the time slice axiom is an immediate consequence of the field equation it was not known whether it also holds in generic interacting theories, the only exception being certain superrenormalizable models in 2 dimensions. In this paper we prove that the time slice axiom holds at least for scalar field theories within formal renormalized perturbation theory.
description: 14 pages, 1 figure, added reference for introduction, corrected typos, corrected a mistake in the proof in section 3
DEP Bulletin - 2025 - Volume 49 Issue 1
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 2025

description: The DEP bulletin is a semi-monthly publication of the New Jersey Department of Environmental Protection. It contains a list of construction permit applications recently filed or acted upon by the Department along with a calendar of events of interest, a schedule of public hearings, and Environmental Impact Statements acted upon during the period.
Resonance-Enhanced Two-Photon Ionization (RETPI) of SiII and an Anomalous, Variable Intensity of the 1892A SiIII] Line in the Weigelt Blobs of Eta Carinae
Creators: name: Johansson, S.
name: Hartman, H.
name: Letokhov, V. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Si III] 1892A intercombination line shows an anomalously high intensity in spectra of the radiation-rich Weigelt blobs in the vicinity of Eta Carinae. The line disappears during the 100 days long spectral events occurring every 5.5 years. The aim is to investigate whether resonance-enhanced two-photon ionization (RETPI) is a plausible excitation mechanism for the Si III] 1892A line. The possible intensity enhancement of the 1892A line is investigated as regards quasi-resonant intermediate energy levels of Si II. The RETPI mechanism is effective on SiII in the radiation-rich Weigelt blobs where the two excitation steps are provided by the two intense hydrogen lines Ly alpha and Ly gamma
description: 4 pages, Accepted for publication in A&A
Standardization of flow cytometric crossmatch (FCXM) for investigation of unexplained habitual abortion
Creators: name: Stephenson, Mary Diane
Publisher: name: University of British Columbia
Year: 2009

description: Recurrent pregnancy loss (RPL), defined as two or more pregnancy losses at any gestational age, affects many couples who are trying to establish a family. Research in the broad field of reproduction has focussed classically upon infertility, that is, the inability to conceive. The inability to maintain pregnancies, that is, recurrent pregnancy loss, remains an enigma, both on a pathophysiological and psychological level. Consequently, many couples who suffer from repeated pregnancy wastage are left without answers, without appropriate therapy and, consequently, often without a family. This Master's thesis will provide an overview of the current knowledge about recurrent pregnancy loss. In particular, the immunological aspects of recurrent pregnancy loss will be discussed. Flow cytometry, as an investigative tool in reproductive immunology, will be described and clinically evaluated as a technique to detect maternal allosensitization to paternal mononuclear cells following immunization. There are many intriguing questions to be answered in regard to the normal and abnormal immune response to pregnancy. With the thorough evaluation of the flow cytometric crossmatch methodology as a clinical tool to assess maternal allosensitization, as described in this Master's thesis, it is hoped that a collaborative approach will be undertaken to answer some of the fundamental questions about the maternal immune response to the fetal allograft. Hopefully this flow cytometric crossmatch methodology will eventually serve a small role in the answering of Sir Peter Medewar's thought-provoking question of 1953, which was, "why does the fetus not habitually provoke an immunological reaction from its mother".
Two-level systems: exact solutions and underlying pseudo-supersymmetry
Creators: name: Shamshutdinova, V. V.
name: Samsonov, Boris F.
name: Gitman, D. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Chains of first-order SUSY transformations for the spin equation are studied in detail. It is shown that the transformation chains are related with a olynomial pseudo-supersymmetry of the system. Simple determinant formulas for the final Hamiltonian of a chain and for solutions of the spin equation are derived. Applications are intended for a two-level atom in an electromagnetic field with a possible time-dependence of the field frequency. For a specific form of this dependence, the time oscillations of the probability to populate the excited level disappear. Under certain conditions this probability becomes a function tending monotonously to a constant value which can exceed 1/2.
description: to be published in Ann. Phys. (NY), 6 figures, 17 pages
Complementary Searches of Low Mass Non-Abelian Vector Dark Matter, Dark Photon and Dark $Z^\prime$
Creators: name: Ramos, Raymundo
name: Tran, Van Que
name: Yuan, Tzu-Chiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a novel study of the non-abelian vector dark matter candidate $W^\prime$ with a MeV$-$GeV low mass range, accompanied by a dark photon $A^\prime$ and a dark $Z^\prime$ of similar masses in the context of a simplified gauged two-Higgs-doublet model. The model is scrutinized by taking into account various experimental constraints including dark photon searches, electroweak precision data, relic density of dark matter together with its direct and indirect searches, mono-jet and Higgs collider physics from LHC. The viable parameter space of the model consistent with all experimental and theoretical constraints is exhibited. While a dark $Z^\prime$ can be the dominant contribution in the relic density due to resonant annihilation of dark matter, a dark photon is crucial to dark matter direct detection. We demonstrate that the parameter space can be further probed in the near future by sub-GeV dark matter experiments like CDEX, NEWS-G and SuperCDMS.
description: 6 pages, 3 figures, 1 table
The suppression of miR-23a, miR-24 and miR-27a induces apoptosis during ESC neural differentiation by modulating BMP4 signaling
Creators: name: Musto, Anna
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Bone morphogenetic protein 4 (BMP4) plays an important role in mouse embryonic stem cells (ESCs) by sustaining pluripotency and blocking differentiation towards neural fate. In this study, we have analyzed the miRNAs regulated by BMP4 in ESCs. We have found that BMP4 signaling directly regulates miR-23a, miR-24-2 and miR-27a through the binding of phospo-Smads on the promoter of the gene encoding all these miRNAs. The suppression of miR-23a, miR-24-2 and miR-27a, together with the suppression of miRNAs of the same families, miR-23b, miR-24-1 and miR-27b, does not impair ESC stemness maintenance and epiblast stem cells (EpiSCs) derivation from ESCs. However, this suppression affects ESC differentiation, thus resulting in the increase of the number of cells undergoing apoptosis soon after the transition from ESCs to EpiSCs. We have demonstrated that the block of BMP4 signaling completely rescues the apoptosis induced by the suppression of miRNAs. Considering that it was already known that BMP4 induces apoptosis during ESC differentiation, our observation suggests that the apoptotic phenotype provoked by miRNA suppression is due to an enhancement of BMP4 signaling. We also demonstrated that miR-23a and miR-23b clusters target Smad5, a downstream effector of BMP4 pathway; this phenomenon explains how the suppression of miRNA clusters enhances BMP4 signaling. In conclusion, the results unveil the existence of a feedback loop, involving Smad5 and miR-23a clusters, that regulates the apoptosis induced by BMP4 during ESC neural differentiation.
An SIB-ELIXIR e-learning module for High Performance Computing (HPC) in Life Sciences
Creators: name: Rossier, Grégoire
name: Engler, Robin
name: Ioannidis, Vassilios
name: Flegel, Volker
name: Stockinger, Heinz
name: Ibberson, Mark
name: Palagi, Patricia M.
Publisher: name: F1000 Research Limited
Year: 2019

description: High-throughput sequencing technologies require scientists to learn and master new technical competences, and the use of High Performance Computing (HPC) machinery is one of them, creating a need for new training topics. While face-to-face courses remain essential for the sake of the human and lively interactions of trainees, their constraints in audience size, location and time availability are a challenge.

To overcome these issues, the SIB Swiss Institute of Bioinformatics (the Swiss ELIXIR Node), has developed an e-learning module in HPC, in the context of the ELIXIR-EXCELERATE project. Composed of theory and quizzes, it aims at providing beginners the keys to properly understand the concept of HPC, its operation and rules, and data management and storage.

This module was conceived as a self-learning product or as the electronic component of a blended training format (i.e. as a complement to a face-to-face course) necessary for new HPC cluster users. In this latter case, the module is aimed at equalizing the skill level prior to the face-to face course. Preliminary results confirm the usefulness of the e-learning module in this context.

The module is available (guest access) on the SIB Training Portal at https://edu.sib.swiss/course/view.php?name=HPCeL.
Optical follow-up of the neutron star-black hole mergers S200105ae and S200115j
Creators: name: Anand, Shreya
name: Coughlin, Michael W.
name: Kasliwal, Mansi M.
name: Bulla, Mattia
name: Ahumada, Tomás
name: Carracedo, Ana Sagués
name: Almualla, Mouza
name: Andreoni, Igor
name: Stein, Robert
name: Foucart, Francois
name: Singer, Leo P.
name: Sollerman, Jesper
name: Bellm, Eric C.
name: Bolin, Bryce
name: Caballero-García, M. D.
name: Castro-Tirado, Alberto J.
name: Cenko, S. Bradley
name: De, Kishalay
name: Dekany, Richard G.
name: Duev, Dmitry A.
name: Feeney, Michael
name: Fremling, Christoffer
name: Goldstein, Daniel A.
name: Golkhou, V. Zach
name: Graham, Matthew J.
name: Guessoum, Nidhal
name: Hankins, Matthew J.
name: Hu, Youdong
name: Kong, Albert K. H.
name: Kool, Erik C.
name: Kulkarni, S. R.
name: Kumar, Harsh
name: Laher, Russ R.
name: Masci, Frank J.
name: Mróz, Przemek
name: Nissanke, Samaya
name: Porter, Michael
name: Reusch, Simeon
name: Riddle, Reed
name: Rosnet, Philippe
name: Rusholme, Ben
name: Serabyn, Eugene
name: Sánchez-Ramírez, R.
name: Rigault, Mickael
name: Shupe, David L.
name: Smith, Roger
name: Soumagnac, Maayane T.
name: Walters, Richard
name: Valeev, Azamat F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: LIGO and Virgo's third observing run (O3) revealed the first neutron star-black hole (NSBH) merger candidates in gravitational waves. These events are predicted to synthesize r-process elements creating optical/near-IR "kilonova" (KN) emission. The joint gravitational-wave (GW) and electromagnetic detection of an NSBH merger could be used to constrain the equation of state of dense nuclear matter, and independently measure the local expansion rate of the universe. Here, we present the optical follow-up and analysis of two of the only three high-significance NSBH merger candidates detected to date, S200105ae and S200115j, with the Zwicky Transient Facility (ZTF). ZTF observed $\sim$\,48\% of S200105ae and $\sim$\,22\% of S200115j's localization probabilities, with observations sensitive to KNe brighter than $-$17.5\,mag fading at 0.5\,mag/day in g- and r-bands; extensive searches and systematic follow-up of candidates did not yield a viable counterpart. We present state-of-the-art KN models tailored to NSBH systems that place constraints on the ejecta properties of these NSBH mergers. We show that with depths of $\rm m_{\rm AB}\approx 22$ mag, attainable in meter-class, wide field-of-view survey instruments, strong constraints on ejecta mass are possible, with the potential to rule out low mass ratios, high BH spins, and large neutron star radii.
Rotating electrons in quantum dots: Quantum Hall liquid in the classical limit
Creators: name: Nikkarila, J. -P.
name: Manninen, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We solve the problem of a few electrons in a two-dimensional harmonic confinement using quantum mechanical exact diagonalization technique, on one hand, and classical mechanics, on the other hand. The quantitative agreement between the results of these two calculations suggests that, at low filling factors, all the low energy excitations of quantum Hall liquid are classical vibrations of localized electrons. The Coriolis force plays a dominant role in determining the classical vibration frequencies.
description: 4 pages 4 figures
Letter from E.S. Jackson Seety (S.C. Smith Lumber Company) to The Rainbow Ranche, March 12, 1908
Creators: name: Seety, E.S. Jackson
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to The Rainbow Ranche from E.S. Jackson Seety of the S.C. Smith Lumber Company, dated March 12, 1908; written on company letterhead. The letter regards monies received on account and an offer to supply building materials.
Cell motility and proliferation in 2D and 3D substrata. Applications to chemotaxis, wound healing and collective migration.
Creators: name: Ascione, Flora
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: A wide range of physiological and pathological processes, such as inflammation, tissue regeneration, angiogenesis, tumour growth and invasion, are strongly linked to cell proliferation and migration mechanisms that govern the dynamic evolution of both individual cells and cell aggregates. The complex mechanisms governing cell dynamic behavior have yet to be completely clarified. A detailed analysis of these processes requires a rigorous approach to quantitatively analyze cell dynamics and measure cell movement and proliferation indices.
This work is addressed to investigate the dynamic evolution of cells, from single to collective cell dynamic behavior, in a quantitative way. Our methodological approach is based on live cell imaging in vitro, coupled to several cell migration assays, and image analysis techniques. Live cell imaging based on in vitro time-lapse microscopy is a powerful analytical tool that allows direct visualization of biological systems during their dynamic evolution. In order to maintain cell viability, the sample is kept in a controlled air, constant temperature environment. The experimental data are used to model cell dynamic evolution using mathematical equations based on the transport phenomena approach.
Deformations of Scalar-Flat Anti-Self-Dual metrics and Quotients of Enriques Surfaces
Creators: name: Kalafat, Mustafa
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C55, 53C27(Primary) 53C25, 53C26 (Secondary)

description: In this article, we prove that a quotient of a K3 surface by a free Z_2+Z_2 action does not admit any metric of positive scalar curvature. This shows that the scalar flat anti self-dual metrics (SF-ASD) on this manifold can not be obtained from a family of metrics for which the scalar curvature changes sign, contrary to the previously known constructions of this kind of metrics on manifolds of b+=0.
description: 12 pages. Typos fixed
Quantifying the structure of strong gravitational lens potentials with uncertainty-aware deep neural networks
Creators: name: Vernardos, Georgios
name: Tsagkatakis, Grigorios
name: Pantazis, Yannis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Gravitational lensing is a powerful tool for constraining substructure in the mass distribution of galaxies, be it from the presence of dark matter sub-halos or due to physical mechanisms affecting the baryons throughout galaxy evolution. Such substructure is hard to model and is either ignored by traditional, smooth modelling, approaches, or treated as well-localized massive perturbers. In this work, we propose a deep learning approach to quantify the statistical properties of such perturbations directly from images, where only the extended lensed source features within a mask are considered, without the need of any lens modelling. Our training data consist of mock lensed images assuming perturbing Gaussian Random Fields permeating the smooth overall lens potential, and, for the first time, using images of real galaxies as the lensed source. We employ a novel deep neural network that can handle arbitrary uncertainty intervals associated with the training dataset labels as input, provides probability distributions as output, and adopts a composite loss function. The method succeeds not only in accurately estimating the actual parameter values, but also reduces the predicted confidence intervals by 10 per cent in an unsupervised manner, i.e., without having access to the actual ground truth values. Our results are invariant to the inherent degeneracy between mass perturbations in the lens and complex brightness profiles for the source. Hence, we can quantitatively and robustly quantify the smoothness of the mass density of thousands of lenses, including confidence intervals, and provide a consistent ranking for follow-up science.
description: 13 pages, 10 figures, accepted for publication in MNRAS
As the Worlds Turn: Constraining Spin Evolution in the Planetary-Mass Regime
Creators: name: Bryan, Marta L.
name: Ginzburg, Sivan
name: Chiang, Eugene
name: Morley, Caroline
name: Bowler, Brendan P.
name: Xuan, Jerry W.
name: Knutson, Heather A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: To understand how planetary spin evolves and traces planet formation processes, we measure rotational line broadening in eight planetary-mass objects (PMOs) of various ages (1--800 Myr) using near-infrared high-resolution spectra from NIRSPEC/Keck. Combining these with published rotation rates, we compile 27 PMO spin velocities, 16 of which derive from our NIRSPEC/Keck program. Our data are consistent with spin velocities $v$ scaling with planetary radius $R$ as $v \propto 1/R$. We conclude that spin angular momentum is conserved as objects cool and contract over the sampled age range. The PMOs in our sample spin at rates that are approximately an order of magnitude below their break-up values, consistent with the hypothesis that they were spun down by magnetized circum-PMO disks (CPDs) during the formation era at ages $\lesssim$ a few Myr. There is a factor of 4--5 variation in spin velocity that has yet to be understood theoretically. It also remains to be seen whether spin evolves on timescales $\gtrsim$ 1 Gyr for PMOs, as it does for stars and high-mass brown dwarfs emitting magnetized winds.
description: accepted to ApJ
Spinning black holes with a separable Hamilton-Jacobi equation from a modified Newman-Janis algorithm
Creators: name: Junior, Haroldo C. D. Lima
name: Crispino, Luís C. B.
name: Cunha, Pedro V. P.
name: Herdeiro, Carlos A. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Obtaining solutions of the Einstein field equations describing spinning compact bodies is typically challenging. The Newman-Janis algorithm provides a procedure to obtain rotating spacetimes from a static, spherically symmetric, seed metric. It is not guaranteed, however, that the resulting rotating spacetime solves the same field equations as the seed. Moreover, the former may not be circular, and thus expressible in Boyer-Lindquist-like coordinates. Amongst the variations of the original procedure, a modified Newman-Janis algorithm (MNJA) has been proposed that, by construction, originates a circular, spinning spacetime, expressible in Boyer-Lindquist-like coordinates. As a down side, the procedure introduces an ambiguity, that requires extra assumptions on the matter content of the model. In this paper we observe that the rotating spacetimes obtained through the MNJA always admit separability of the Hamilton-Jacobi equation for the case of null geodesics, in which case, moreover, the aforementioned ambiguity has no impact, since it amounts to an overall metric conformal factor. We also show that the Hamilton-Jacobi equation for light rays propagating in a plasma admits separability if the plasma frequency obeys a certain constraint. As an illustration, we compute the shadow and lensing of some spinning black holes obtained by the MNJA.
description: Published in The European Physical Journal C
Finite Temperature Dynamics of the Spin 1/2 Bond Alternating Heisenberg Antiferromagnetic Chain
Creators: name: Mikeska, H. -J.
name: Luckmann, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present results for the dynamic structure factor of the S=1/2 bond alternating Heisenberg chain over a large range of frequencies and temperatures. Data are obtained from a numerical evaluation of thermal averages based on the calculation of all eigenvalues and eigenfunctions for chains of up to 20 spins. Interpretation is guided by the exact temperature dependence in the noninteracting dimer limit which remains qualitatively valid up to an interdimer exchange $λ\approx 0.5$. The temperature induced central peak around zero frequency is clearly identified and aspects of the crossover to spin diffusion in its variation from low to high temperatures are discussed. The one-magnon peak acquires an asymmetric shape with increasing temperature. The two-magnon peak is dominated by the S=1 bound state which remains well defined up to temperatures of the order of J. The variation with temperature and wavevector of the integrated intensity for one and two magnon scattering and of the central peak are discussed.
description: 8 pages, 8 figures
Pa'iipáa
Creators: name: Toggery, Bill
name: Halpern, Abraham M.
name: Kelly, Lavina
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: yum

description: 2 WAV files. Tape labeled "copy of Lavina's" on both sides. Digitization by The Audio Archive (Burlingame, California).
MPEC 2024-T182 : 2024 TG5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TG5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Mixture Models for Photometric Redshifts
Creators: name: Ansari, Z.
name: Agnello, A.
name: Gall, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Determining photometric redshifts to high accuracy is paramount to measure distances in wide-field cosmological experiments. With only photometric information at hand, photo-zs are prone to systematic uncertainties in the intervening extinction and the unknown underlying spectral-energy distribution of different astrophysical sources. Here, we aim to resolve these model degeneracies and obtain a clear separation between intrinsic physical properties of astrophysical sources and extrinsic systematics. We aim at estimates of the full photo-z probability distributions, and their uncertainties. We perform a probabilistic photo-z determination using Mixture Density Networks (MDN). The training data-set is composed of optical ($griz$) point-spread-function and model magnitudes and extinction measurements from the SDSS-DR15, and WISE midinfrared ($3.4 μ$m and $4.6 μ$m) model magnitudes. We use Infinite Gaussian Mixture models to classify the objects in our data-set as stars, galaxies or quasars, and to determine the number of MDN components to achieve optimal performance. The fraction of objects that are correctly split into the main classes is 94%. Our method improves the bias of photometric redshift estimation (i.e. the mean $Δz$ = (zp - zs)/(1 + zs)) by one order of magnitude compared to the SDSS photo-z, and decreases the fraction of $3 σ$ outliers (i.e. 3rms$(Δz) < Δz$). The relative, root-mean-square systematic uncertainty in our resulting photo-zs is down to 1.7% for low-redshift galaxies (zs $
description: 14 pages, 9 figures, 7 tables, submitted to A&A 14/10/2020
Serotonergic stereotypy and sexual behavior in the rat: regulation by corticosterone
Creators: name: Hanson, Laura A.
Publisher: name: University of British Columbia
Year: 2009

description: Both adrenalectomy and the adrenal hormone corticosterone have been shown to alter serotonergic type 2A (5-HT2A) receptor activity. 5-HT2A receptors mediate effects on both "wet dog shakes" (WDS) and sexual behavior in the rat. In the present series of experiments, the potential involvement of corticosterone in the regulation of WDS and sexual behavior in the male and female rat was investigated. In Experiment 1, bilaterally-adrenalectomized rats were compared to sham-adrenalectomized rats in the frequency of both spontaneous WDS, and WDS following the adrninistration of the 5-HT2A agonist DOI. Adrenalectomy resulted in a significant reduction of DOI-induced WDS in both the male and female rat. In Experiment 2, rats chronically received either corticosterone or oil and were again scored for WDS behavior. Following DOI treatment, corticosterone effectively blocked the adrenalectomy-induced reduction of WDS in both the male and female rat. In Experiment 3, adrenally-intact male rats received either chronic corticosterone injections or oil injections. Rats were then compared on measures of both spontaneous and DOI-induced WDS and sexual behavior. Rats receiving chronic corticosterone exhibited a significant increase in WDS and a marked inhibition of male sexual behavior in both the spontaneous and DOI conditions. In Experiment 4, both adrenalectomized and sham-adrenalectomized females were divided into groups receiving either chronic corticosterone or oil. Rats were compared on measures of spontaneous and DOIinduced WDS and sexual behavior following the administration of estrogen alone, or estrogen in combination with progesterone. Chronic corticosterone administration increased WDS and facilitated female sexual behavior, while adrenalectomy decreased WDS and had mixed effects on female sexual behavior. These results suggest that the adrenal steroid corticosterone is important in the regulation of WDS and sexual behavior in both the male and female rat, and that this regulation may be mediated by activity at 5-HTǠ receptors.