cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Influences on worker’s role with children in residential settings
title: A grounded theory
titleType: Subtitle
Creators: name: Heyes, Mike
Publisher: name: Lancaster University
Year: 2022

description: Abstract Working with children in out-of-home care can be complex and require a range of personal and professional skills. The current study explored the influence of personal life experiences on staff who worked with children in out-of-home care. Eight staff members from residential or respite care were interviewed about the influence of their personal life experiences on different aspects of their role, such as choosing to enter the role and ways of working with the children they cared for. A constructivist grounded theory approach was used to generate a model based on the reflections of participants. Participants shared their childhood experiences were key in shaping their values or qualities. Participants’ values led them to want to enter caregiving roles, and they drew from these values and qualities in a predominantly unconscious way. Participants highlighted that at times they purposely drew from their own life experiences to build connections with and further understand the children they support. Participants cited work-based influences as being important in their role, recognising their dual role as ‘professionals’ and ‘people’, as they were encouraged to bring their personal self into interactions with young people. Work-based influences such as training, and spending time with colleagues allowed participants to gain knowledge and learn new skills which they used consciously within their interactions. General experience in the role was aided by this continued development. Participants highlighted adhering to plans and policies as having a crucial influence on their role, sometimes causing frustration when working in ways that went against personal values. This study highlights the combination of professional and personal elements for staff working with children in out-of-home care. The study includes recommendations to support staff teams around the impact of their work and their influences, as well as the need for clinical supervision, formulation and reflective practice .
title: Gadolinium-based contrast agents could lead to local temperature changes under magnetic field
Creators: name: Akay, Sinan
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Physics
subject: Experimental investigations
subject: Contrast agent-other
subject: MR
subject: MR physics
subject: Contrast agents
subject: Biological effects

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Gadolinium chelates are preferred in magnetic resonance imaging as contrast agents due to their capacity to improve visibility. Such chelates, also known as Gadolinium-based contrast agents (GBCAs), were previously known to be safely and...
STAR's Measurement of Energy and System Size Dependence of K/$π$ Fluctuations at RHIC
Creators: name: Ahammed, Zubayer
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Strangeness enhancement has been predicted to be one of the signatures of the formation of the quark gluon plasma (QGP) and event-by-event fluctuations of strangeness may reveal the nature of such a phase transition. We report results for $K/π$ fluctuations from Cu+Cu at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV and Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4, 130 and 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. We compare our results with the results observed in central Pb+Pb collisions at SPS energies at $\sqrt{s_{NN}}$ = 6.3, 7.6, 8.8, 12.3, and 17.3 GeV. We observe the fluctuation strength measured at the highest SPS energy point by the NA49 collaboration in Pb+Pb collisions is similar to our results in Cu+Cu and Au+Au collisions. We also compare our results with HIJING, a statistical hadronization model and a multi-phase transport model.
description: To be published in the proceedings of Quark Matter, 2008, held at Jaipur, India
Accelerator Development at the FREIA Laboratory
Creators: name: Ruber, R.
name: Bhattacharyya, A. K.
name: Dancila, D.
name: Ekelöf, T.
name: Eriksson, J.
name: Fransson, K.
name: Gajewski, K.
name: Goryashko, V.
name: Hermansson, L.
name: Jacewicz, M.
name: Jobs, M.
name: Jönsson, Å.
name: Li, H.
name: Lofnes, T.
name: Miyazaki, A.
name: Olvegård, M.
name: Pehlivan, E.
name: Peterson, T.
name: Pepitone, K.
name: Rydberg, A.
name: Kern, R. Santiago
name: Wedberg, R.
name: Wiren, A.
name: Yogi, R.
name: Ziemann, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The FREIA Laboratory at Uppsala University focuses on superconducting technology and accelerator development. It actively supports the development of the European Spallation Source, CERN, and MAX IV, among others. FREIA has developed test facilities for superconducting accelerator technology such as a double-cavity horizontal test cryostat, a vertical cryostat with a novel magnetic field compensation scheme, and a test stand for short cryomodules. Accelerating cavities have been tested in the horizontal cryostat, crab-cavities in the vertical cryostat, and cryomodules for ESS on the cryomodule test stand. High power radio-frequency amplifier prototypes based on vacuum tube technology were developed for driving spoke cavities. Solid-state amplifiers and power combiners are under development for future projects. We present the status of the FREIA Laboratory complemented with results of recent projects and future prospects.
description: 30 pages, 18 figures
An Ideal Channel of Long Distance Entanglement in Spin Systems
Creators: name: Xi, Xiao-Qiang
name: Zhang, T.
name: Yue, R. H.
name: Xie, X. C.
name: Liu, W. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme for using spin chain to realize an ideal channel of long distance entanglement. The results show that there has different entanglement in different Hilbert subspace, the anisotropic parameter $Δ$ will frustrate the entanglement and the magnetic field affect the entanglement through changing the ground state, the boundary entanglement $C_{1N}$ has the simplest expression in the simplest subspace and it only depend on the first item of the ground state, that item can be increased when a local magnetic field is introduced. Our propose can be handled easily because it only needs a uniform XX open chain initialized in the simplest Hilbert subspace and a bulk magnetic field that absent for the boundary qubits.
description: Comments are welcome (xxq@xiyou.edu.cn)
Triple-loop networks with arbitrarily many minimum distance diagrams
Creators: name: Sabariego, Pilar
name: Santos, Francisco
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 68R10; 05C20, 68M10

description: Minimum distance diagrams are a way to encode the diameter and routing information of multi-loop networks. For the widely studied case of double-loop networks, it is known that each network has at most two such diagrams and that they have a very definite form "L-shape''. In contrast, in this paper we show that there are triple-loop networks with an arbitrarily big number of associated minimum distance diagrams. For doing this, we build-up on the relations between minimum distance diagrams and monomial ideals.
description: 17 pages, 8 figures
Orbital precession of the S2 star in Scalar-Tensor-Vector-Gravity
Creators: name: Della Monica, Riccardo
name: de Martino, Ivan
name: de Laurentis, Mariafelicia
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have obtained the first constraint of the parameter space of Scalar-Tensor-Vector-Gravity using the motion of the S2-star around the supermassive black hole at the centre of the Milky Way, and we did not find any serious tension with General Relativity. We used the Schwarzschild-like metric of Scalar-Tensor-Vector-Gravity to predict the orbital motion of S2-star, and to compare it with the publicly available astrometric data, which include 145 measurements of the positions, 44 measurements of the radial velocities of S2-star along its orbit, and the recent measurement of the orbital precession. We employed a Monte Carlo Markov Chain algorithm to explore the parameter space, and constrained the only one additional parameter of Scalar-Tensor-Vector-Gravity to $α\lesssim 0.410$ at 99,7$\%$ confidence level, where $α=0$ reduces this modified theory of gravity to General Relativity.
description: 11 pages, 4 figures, 2 tables
On the Advantages of Multiple Stereo Vision Camera Designs for Autonomous Drone Navigation
Creators: name: de Figueiredo, Rui Pimentel
name: Hansen, Jakob Grimm
name: Fevre, Jonas Le
name: Brandão, Martim
name: Kayacan, Erdal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this work we showcase the design and assessment of the performance of a multi-camera UAV, when coupled with state-of-the-art planning and mapping algorithms for autonomous navigation. The system leverages state-of-the-art receding horizon exploration techniques for Next-Best-View (NBV) planning with 3D and semantic information, provided by a reconfigurable multi stereo camera system. We employ our approaches in an autonomous drone-based inspection task and evaluate them in an autonomous exploration and mapping scenario. We discuss the advantages and limitations of using multi stereo camera flying systems, and the trade-off between number of cameras and mapping performance.
Mass Measurements and Implications for the Energy of the High-Spin Isomer in 94Ag
Creators: name: Kankainen, A.
name: Elomaa, V. -V.
name: Batist, L.
name: Eliseev, S.
name: Eronen, T.
name: Hager, U.
name: Hakala, J.
name: Jokinen, A.
name: Moore, I. D.
name: Novikov, Yu. N.
name: Penttilä, H.
name: Popov, A.
name: Rahaman, S.
name: Rinta-Antila, S.
name: Rissanen, J.
name: Saastamoinen, A.
name: Seliverstov, D. M.
name: Sonoda, T.
name: Vorobjev, G.
name: Weber, C.
name: Äystö, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Nuclides in the vicinity of 94Ag have been studied with the Penning trap mass spectrometer JYFLTRAP at the Ion-Guide Separator On-Line. The masses of the two-proton-decay daughter 92Rh and the beta-decay daughter 94Pd of the high-spin isomer in 94Ag have been measured, and the masses of 93Pd and 94Ag have been deduced. When combined with the data from the one-proton or two-proton-decay experiments, the results lead to contradictory mass excess values for the high-spin isomer in 94Ag, -46370(170) or -44970(100) keV, corresponding to excitation energies of 6960(400) or 8360(370) keV, respectively.
description: 4 pages, 3 figures and 3 tables; v2: updated figures and references, published in Physical Review Letters
title: Acoustic travel time tomography: Applicability of an array of directional sound sources
Creators: name: Dokhanchi, Najmeh
name: Arnold, Jörg
name: Vogel, Albert
name: Völker, Conrad
Publisher: name: Bauhaus-Universität Weimar
Year: 2022
Subjects: subject: Bauphysik
subject: Bauklima
subject: Akustische Laufzeit-Tomographie
subject: Acoustic Travel-Time Tomography
subject: 530

description: The technique of Acoustic travel-time TOMography (ATOM) allows for measuring the distribution of air temperatures throughout the entire room based on the determined sound-travel-times of early reflections, currently up to second order reflections. The number of detected early reflections in the room impulse response (RIR) which stands for the desired sound paths inside the room, has a significant impact on the resolution of reconstructed temperatures. This study investigates the possibility of utilizing an array of directional sound sources for ATOM measurements instead of a single omnidirectional loudspeaker used in the previous studies [1–3]. The developed measurement setup consists of two directional sound sources placed near the edge of the floor in the climate chamber of the Bauhaus-University Weimar and one omnidirectional receiver at center of the room near the ceiling. In order to compensate for the reduced number of sound paths when using directional sound sources, it is proposed to take high-energy early reflections up to third order into account. For this purpose, the simulated travel times up to third-order image sources were implemented in the image source model (ISM) algorithm, by which these early reflections can be detected effectively for air temperature reconstructions. To minimize the uncertainties of travel-times estimation due to the positioning of the sound transducers inside the room, measurements were conducted to determine the exact emitting point of the utilized sound source i.e. its acoustic center (AC). For these measurements, three types of excitation signals (MLS, linear and logarithmic chirp signals) with various frequency ranges were used considering that the acoustic center of a sound source is a frequency dependent parameter [4]. Furthermore, measurements were conducted to determine an optimum excitation signal based on the given condition of the ATOM measurement set-up which defines an optimum method for the RIR estimation correspondingly. Finally, the uncertainty of the measuring system utilizing an array of directional sound sources was analyzed.
(p,q)-string in matrix-regularized membrane and type IIB duality
Creators: name: Okagawa, Hiroyuki
name: Uehara, Shozo
name: Yamada, Satoshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a lightcone wrapped supermembrane compactified on 2-torus in the matrix regularization. We examine the double dimensional reduction technique and deduce the free matrix string of (p,q)-string in type IIB superstring theory explicitly from the matrix-regularized wrapped supermembrane. In addition we obtain the (2+1)-dimensional super Yang-Mills action in curved background. We also examine the duality.
description: 25 pages
Proposition Algebra with Projective Limits
Creators: name: Bergstra, J. A.
name: Ponse, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3.2

description: Sequential propositional logic deviates from ordinary propositional logic by taking into account that during the sequential evaluation of a propositional statement,atomic propositions may yield different Boolean values at repeated occurrences. We introduce `free valuations' to capture this dynamics of a propositional statement's environment. The resulting logic is phrased as an equationally specified algebra rather than in the form of proof rules, and is named `proposition algebra'. It is strictly more general than Boolean algebra to the extent that the classical connectives fail to be expressively complete in the sequential case. The four axioms for free valuation congruence are then combined with other axioms in order define a few more valuation congruences that gradually identify more propositional statements, up to static valuation congruence (which is the setting of conventional propositional logic). Proposition algebra is developed in a fashion similar to the process algebra ACP and the program algebra PGA, via an algebraic specification which has a meaningful initial algebra for which a range of coarser congruences are considered important as well. In addition infinite objects (that is propositional statements, processes and programs respectively) are dealt with by means of an inverse limit construction which allows the transfer of knowledge concerning finite objects to facts about infinite ones while reducing all facts about infinite objects to an infinity of facts about finite ones in return.
description: 43 pages, 3 tables
Detecting drought stress in longan tree using thermal imaging
Creators: name: Winai Wiriya-Alongkorn
name: Spreer, Wolfram
name: Somchai Ongprasert
name: Spohrer, Klaus
name: Tanachai Pankasemsuk
name: M?Ller, Joachim
Publisher: name: Maejo University
Year: 2013
Subjects: Dimocarpus longan,irrigation,crop water stress index,stomatal resistance,leaf water potential,thermal imaging,drought stress,longan tree

description: 1, 7, Maejo International Journal of Science and Technology
title: Use of a structure-borne sound-based in-process sensor system to identify Weld seam irregularities during electron beam welding
Creators: name: Wolf, Christian
name: Sommer, Niklas
name: Böhm, Stefan
Publisher: name: KOBRA Universität Kassel
Year: 2024
Subjects: subject: electron beam welding
subject: structure-borne sound emission
subject: in-process monitoring
subject: weld seam irregularities
subject: machine learning models
classificationCode: 600
subject: 600
classificationCode: Elektronenstrahlschweißen
subject: Elektronenstrahlschweißen
classificationCode: Schweißnaht
subject: Schweißnaht
classificationCode: Maschinelles Lernen
subject: Maschinelles Lernen
classificationCode: Körperschall
subject: Körperschall
classificationCode: Schallabstrahlung
subject: Schallabstrahlung

description:
In this publication, an in-process quality assurance method for electron beam welding based on a structure-borne sound emission test for the detection of weld irregularities arising in the process is presented. For this purpose, different sheet materials, i.e., AISI 304, AZ31 and AlMg3, were welded in a butt-joint and the resulting process noises were recorded by means of two acoustic emission sensors specifically designed for structure-borne sound. During the welding experiments, typical irregularities, e.g. incidence points, pore lines and cracks, were deliberately induced. Subsequently, the recorded acoustic signals were examined with regard to defect-specific abnormalities. Various methods in the time and frequency domain as well as pre-trained machine learning models were used to analyze the acoustic emission data. The results show that the investigated irregularities can be identified and distinguished from other process emissions, eventually enabling a robust means of identification for weld seam irregularities and, thus, opening pathways towards cost-effective in-process quality control.
A survey of the teaching of reasoned criticism in British Columbia secondary schools
Creators: name: Frost, Marcia Brenda Davis
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to determine whether British Columbia teachers were achieving the goal of teaching an integrated art program. The component of the curriculum which is specifically studied is reasoned criticism, traditionally a neglected component in art education. Through a survey of art teachers in selected B.C. high schools, information was gathered to assess the impact of the new B.C. Secondary. Art Curriculum grade 8-12 upon teaching practice in criticism. The results of the study show that the new curriculum has had little impact on the teaching of reasoned criticism. The results indicate that art production remains the focus of- art programs while reasoned criticism occurs most frequently as a process of informal discussion between the student and teacher while attention is focused on the student's work. A summary of the findings is provided and implications of the study for classroom practice are discussed.
Effects of rejuvenator seal and fog seal on performance of open-graded friction course pavement
Creators: name: Qureshi, Nadeem A.
name: Tran, Nam H.
name: Watson, Donald
name: Jamil, Syed M.
Publisher: name: Maejo University
Year: 2013
Subjects: rejuvenator seal,fog seal,hot-mix asphalt pavement,open-graded friction course,surface friction

description: 2, 7, Maejo International Journal of Science and Technology
Theory of Superconductivity in the Cuprates
Creators: name: Aji, Vivek
name: Shekhter, Arkady
name: Varma, Chandra
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The quantum critical fluctuations of the time-reversal breaking order parameter which is observed in the pseudogap regime of the Cuprates are shown to couple to the lattice equivalent of the local angular momentum of the fermions. Such a coupling favors scattering of fermions through angles close to $\pm π/2$ which is unambiguously shown to promote d-wave pairing. The right order of magnitude of both $T_c$ and the normalized zero temperature gap $Δ/T_c$ are calculated using the same fluctuations which give the temperature, frequency and momentum dependence of the the anomalous normal state properties for dopings near the quantum-critical value and with two parameters extracted from fit to such experiments.
description: Accepted for publication in PRB with the title "Theory of the coupling of quantum-critical fluctuations to fermions and d-wave superconductivity in the cuprates"
A compact and fast magnetic coil for the interaction manipulation of quantum gases with Feshbach resonances
Creators: name: Kell, A.
name: Link, M.
name: Breyer, M.
name: Hoffmann, A.
name: Köhl, M.
name: Gao, K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Cold atom experiments commonly use broad magnetic Feshbach resonances to manipulate the interaction between atoms. In order to induce quantum dynamics by a change of the interaction strength, rapid ($\simμs$) magnetic field changes over several tens of Gauss are required. Here we present a compact design of a coil and its control circuit for a change of the magnetic field up to $36G$ in $3μs$. The setup comprises two concentric solenoids with minimal space requirements, which can be readily added to existing apparatuses. This design makes the observation of non-equilibrium physics with broad Feshbach resonances accessible.
description: 4 pages, 4 figures
Magnetism of quantum dot clusters: A Hubbard model study
Creators: name: Nikkarila, J. -P.
name: Koskinen, M.
name: Manninen, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetic properties of two and three-dimensional clusters of quantum dots are studied with exact diagonalization of a generalized Hubbard model. We study the weak coupling limit, where the electrons interact only within a quantum dot and consider cases where the second or third harmonic oscillator shell is partially filled. The results show that in the case of half-filled shell the magnetism is determined by the antiferromagnetic Heisenberg model with spin 1/2, 1 or 3/2, depending on the number of electrons in the open shell. For other fillings the system in most cases favors a large total spin, indicating a ferromagnetic coupling between the dots.
description: 9 pages, 9 figures
Reachability analysis of a class of Petri nets using place invariants and siphons
Creators: name: Li, Zhi Wu
name: Zhang, Xiu Yan
name: Zhong, Chun Fu
name: Abdulrahman M. Al-Ahmari
Publisher: name: Maejo University
Year: 2013
Subjects: Petri nets,strict minimal siphons,place invariants,reachability analysis,flexible manufacturing system

description: 2, 7, Maejo International Journal of Science and Technology
Impact of Cosmic Rays on Population III Star Formation
Creators: name: Stacy, Athena
name: Bromm, Volker
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the implications of a possible cosmic ray (CR) background generated during the first supernova explosions that end the brief lives of massive Population III stars. We show that such a CR background could have significantly influenced the cooling and collapse of primordial gas clouds in minihaloes around redshifts of z ~ 15 - 20, provided the CR flux was sufficient to yield an ionization rate greater than about 10^-19 s^-1 near the center of the minihalo. The presence of CRs with energies less than approximately 10^7 eV would indirectly enhance the molecular cooling in these regions, and we estimate that the resulting lower temperatures in these minihaloes would yield a characteristic stellar mass as low as ~ 10 M_sun. CRs have a less pronounced effect on the cooling and collapse of primordial gas clouds inside more massive dark matter haloes with virial masses greater than approximately 10^8 M_sun at the later stages of cosmological structure formation around z ~ 10 - 15. In these clouds, even without CR flux the molecular abundance is already sufficient to allow cooling to the floor set by the temperature of the cosmic microwave background.
description: MNRAS in press, 12 pages, 6 figures
Heterotic mini-landscape (II): completing the search for MSSM vacua in a Z_6 orbifold
Creators: name: Lebedev, Oleg
name: Nilles, Hans Peter
name: Ramos-Sanchez, Saul
name: Ratz, Michael
name: Vaudrevange, Patrick K. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We complete our search for MSSM vacua in the Z_6-II heterotic orbifold by including models with 3 Wilson lines. We estimate the total number of inequivalent models in this orbifold to be 10^7. Out of these, we find almost 300 models with the exact MSSM spectrum, gauge coupling unification and a heavy top quark. Models with these features originate predominantly from local GUTs. The scale of gaugino condensation in the hidden sector is correlated with properties of the observable sector such that soft masses in the TeV range are preferred.
description: 12 pages, 2 figures; v2: fig. 1 corrected
Will it Crease or Cease? A study of Debulking of Air Pockets in Automated Prepreg Composite Layup
Creators: name: Krogh, Christian
name: Jakobsen, Johnny
name: Wilm, Jakob
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Automatic draping of carbon-fiber prepreg plies for the aerospace industry is a promising technique for lowering the manufacturing costs and to this end, a thorough in-process quality control is crucial. In this paper, out-of-plane defects in the layup are investigated. After draping, air pockets are occasionally encountered. The question is, if such apparent defects can be mitigated sufficiently during vacuum debulking. The 3D topology is measured by means of a structured-light 3D scanner and air pockets are segmented. An approximate mass-spring ply model is used to study the behavior of the air pockets during application of vacuum pressure. The model is computationally fast and will indicate online whether the air pocket will be removed or manual intervention is required. Upon comparing the model predictions with experimental data, it is shown that the system is capable of correctly predicting 13 out of 14 air pockets in a test layup.
description: Accepted manuscript
Sense of Community in contexts of multi culture
Creators: name: Barbieri, Irene <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: M-PSI/05 Psicologia sociale

description: The theme “Belongingness” has a central role in the current debate on Community Psychology and in daily life. To try to understand the consequences of these changes, the research focuses on the concept of Sense of Community. In fact, Sense of Community has always been a central tool (Sarason, 1974; MacMillan & Chavis, 1986) to study communities (McMillan, 2011; Nowell & Boyd, 2011) and for a long time has represented positive values and something to aspire to. However, current debates indicate that Sense of Community is an outmoded concept and underline the problematic issue of “promotion of Sense of Community” in contexts of multi culture.
The aim of the present research is to analyze Sense of Community in context of multi culture, as we consider that it can still be a fundamental tool to study and understand communities. In particular we are interested in understanding the role of Multiple Sense of Community (Brodsky, 2009) on Identity and Wellbeing (and its dimensions).
We focused on a specific context, the Station Zone in Reggio Emilia, that is characterized by high levels of cultural diversity and different social problems (Giovannini & Vezzali, 2011).
The research is developed and divided into two parts. The first part consists of an exploratory qualitative study that analyzes meanings of community among leaders of different ethnic groups living in the Station Zone.
The second part consists of a “General Model” study and four parallel studies to analyze Multiple Sense of Community in different ethnic groups (Albanians, Moroccans, Chinese and Italians.
The results indicate the different role of Multiple SOC in the relation between Identity and Wellbeing, in particular the relevance of Relational SOC and its different implications. Moreover, the factor “culture” represents an significant element in order to consider differences among ethnic groups.
Protein secondary structure classification for PPI site prediction using ASPRA distance
Creators: name: Quadrini, Michela
name: Ferrari, Carlo
Publisher: name: F1000 Research Limited
Year: 2021

description: Proteins perform a broad range of functions within organisms. Most of these activities are possible
 by interacting with other molecules, including proteins, RNAs or DNAs, and small ligands. The interactions between two proteins referred to as protein-protein interactions (PPIs) determine the metabolic and signaling pathways, whose dysfunction or malfunction cause several diseases, among which neurodegenerative disorders and cancer. Proteins consist of one or more sequences of amino acids that fold back on themselves by determining three-dimensional configurations or shapes. Such a configuration is strictly related to its function because it determines whether the protein can interact with other molecules. A shape can be abstracted as secondary structure that are widely employed in structural biology applications since they can be handled efficiently and are relevant from a biological perspective. They are also used for comparison and classification.
 In this work, we propose to use the Algebraic Structural Pseudoknot RNA Alignment (ASPRA) distance to quantify the structural differences among proteins and obtain new protein structural classifications by classical machine learning techniques in the scenario of supporting an incrementing of the performance of PPI site prediction techniques structural based motivated by the analysis of our recent results. It is evident that the performance of our PPI site prediction approach depends on the similarity of protein architecture: it is significant when the proteins of dataset show similar architecture.
 We represent the secondary structures as an arc annotated sequence, and split each residue into as many residues as the number of bonds it forms without adding new crossings among arcs since ASPRA distance requires that each amino acid is involved in at most one base pair. This requirement means that only one arc can be attached to each vertex. We have developed the proposed approach in Python by using Biopython and DSSP packages. Our approach allows classify allows us to predict PPI site interaction of proteins having similar structures and organize appropriately the protein dataset.
Optical degradation impact on the spectral performance of photovoltaic technology
Creators: name: Fernández-Solas, Álvaro
name: Micheli, Leonardo
name: Almonacid, Florencia
name: Fernández, Eduardo F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The exponential growth of global capacity along with a reduction in manufacturing costs in the last two decades has caused photovoltaic (PV) energy technology to reach a high maturity level. As a consequence, currently, researchers from all over the world are making great efforts to analyse how different types of degradation impact this technology. This study provides a detailed review of the impact of different optical degradation mechanisms, which mainly affect the transmittance of the top-sheet encapsulant, on the spectral response of the PV modules. The impact on the spectral performance of PV modules is evaluated by considering the variations of the short-circuit current since this is the most widely used parameter to study the spectral impact in outdoors. Some of the most common types of optical degradation affecting the performance of PV modules worldwide, such as discoloration, delamination, aging and soiling have been addressed. Due to the widely documented impact of soiling on the spectral response of modules, this mechanism has been specially highlighted in this study. On the other hand, most of the publications analysed in this review report optical degradation in PV modules with polymeric encapsulant materials. Furthermore, an innovative procedure to quantify the spectral impact of degradation on PV devices is presented. This has been used to analyse the impact of two particular cases of degradation due to soiling and discoloration on the spectral response of different PV technologies.
A revision of the Generalized Uncertainty Principle
Creators: name: Bambi, Cosimo
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Generalized Uncertainty Principle arises from the Heisenberg Uncertainty Principle when gravity is taken into account, so the leading order correction to the standard formula is expected to be proportional to the gravitational constant $G_N = L_{Pl}^2$. On the other hand, the emerging picture suggests a set of departures from the standard theory which demand a revision of all the arguments used to deduce heuristically the new rule. In particular, one can now argue that the leading order correction to the Heisenberg Uncertainty Principle is proportional to the first power of the Planck length $L_{Pl}$. If so, the departures from ordinary quantum mechanics would be much less suppressed than what is commonly thought.
description: 6 pages, 1 figure
A Stochastic Theory of the Hierarchical Clustering II. Halo progenitor mass function and large-scale bias
Creators: name: Lapi, Andrea
name: Danese, Luigi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We generalize the stochastic theory of hierarchical clustering presented in paper I by Lapi & Danese (2020) to derive the (conditional) halo progenitor mass function and the related large-scale bias. Specifically, we present a stochastic differential equation that describes fluctuations in the mass growth of progenitor halos of given descendant mass and redshift, as driven by a multiplicative Gaussian white noise involving the power spectrum and the spherical collapse threshold of density perturbations. We demonstrate that, as cosmic time passes, the noise yields an average drift of the progenitors toward larger masses, that quantitatively renders the expectation from the standard extended Press & Schechter (EPS) theory. We solve the Fokker-Planck equation associated to the stochastic dynamics, and obtain as an exact, stationary solution the EPS progenitor mass function. Then we introduce a modification of the stochastic equation in terms of a mass-dependent collapse threshold modulating the noise, and solve analytically the associated Fokker-Planck equation for the progenitor mass function. The latter is found to be in excellent agreement with the outcomes of $N-$body simulations; even more remarkably, this is achieved with the same shape of the collapse threshold used in paper I to reproduce the halo mass function. Finally, we exploit the above results to compute the large-scale halo bias, and find it in pleasing agreement with the $N-$body outcomes. All in all, the present paper illustrates that the stochastic theory of hierarchical clustering introduced in paper I can describe effectively not only halos' abundance, but also their progenitor distribution and their correlation with the large-scale environment across cosmic times.
description: 19 pages, 6 figures. Accepted by ApJ
First-Order Type Effects in YBa$_2$Cu$_3$O$_{6+x}$ at the Onset of Superconductivity
Creators: name: Tassini, L.
name: Prestel, W.
name: Erb, A.
name: Lambacher, M.
name: Hackl, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present results of Raman scattering experiments on tetragonal ${\rm (Y_{1-y}Ca_{y})Ba_{2}Cu_{3}O_{6+x}}$ for doping levels $p(x,y)$ between 0 and 0.07 holes/CuO$_2$. Below the onset of superconductivity at $p_{\rm sc1} \approx 0.06$, we find evidence of a diagonal superstructure. At $p_{\rm sc1}$, lattice and electron dynamics change discontinuously with the charge and spin properties being renormalized at all energy scales. The results indicate that charge ordering is intimately related to the transition at $p_{\rm sc1}$ and that the maximal transition temperature to superconductivity at optimal doping $T_{c}^{\rm max}$ depends on the type of ordering at $p>p_{\rm sc1}$.
description: 4 pages, 4 figures
Viscosity solutions for systems of parabolic variational inequalities
Creators: name: Maticiuc, Lucian
name: Pardoux, Etienne
name: Răşcanu, Aurel
name: Zălinescu, Adrian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we first define the notion of viscosity solution for the following system of partial differential equations involving a subdifferential operator:\[\{[c]{l}\dfrac{\partial u}{\partial t}(t,x)+\mathcal{L}_tu(t,x)+f(t,x,u(t,x))\in\partialϕ(u(t,x)),\quad t\in[0,T),x\in\mathbb{R}^d, u(T,x)=h(x),\quad x\in\mathbb{R}^d,\] where $\partialϕ$ is the subdifferential operator of the proper convex lower semicontinuous function $ϕ:\mathbb{R}^k\to (-\infty,+\infty]$ and $\mathcal{L}_t$ is a second differential operator given by $\mathcal{L}_tv_i(x)={1/2}\operatorname {Tr}[σ(t,x)σ^*(t,x)\mathrm{D}^2v_i(x)]+< b(t,x),\nabla v_i(x)>$, $i\in\bar{1,k}$. We prove the uniqueness of the viscosity solution and then, via a stochastic approach, prove the existence of a viscosity solution $u:[0,T]\times\mathbb{R}^d\to\mathbb{R}^k$ of the above parabolic variational inequality.
description: Published in at http://dx.doi.org/10.3150/09-BEJ204 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Chemical Kinetics Simulations of Ice Chemistry on Porous Versus Non-Porous Dust Grains
Creators: name: Christianson, Drew A.
name: Garrod, Robin T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The degree of porosity in interstellar dust-grain material is poorly defined, although recent work has suggested that the grains could be highly porous. Aside from influencing the optical properties of the dust, porosity has the potential to affect the chemistry occurring on dust-grain surfaces, via increased surface area, enhanced local binding energies, and the possibility of trapping of molecules within the pores as ice mantles build up on the grains. Through computational kinetics simulations, we investigate how interstellar grain-surface chemistry and ice composition are affected by the porosity of the underlying dust-grain material. Using a simple routine, idealized three-dimensional dust-grains are constructed, atom by atom, with varying degrees of porosity. Diffusive chemistry is then simulated on these surfaces using the off-lattice microscopic Monte Carlo chemical kinetics model, MIMICK, assuming physical conditions appropriate to dark interstellar clouds. On the porous grain surface, the build-up of ice mantles, mostly composed of water, leads to the covering over of the pores, leaving empty pockets. Once the pores are completely covered, the chemical and structural behavior is similar to non-porous grains of the same size. The most prominent chemical effect of the presence of grain porosity is the trapping of molecular hydrogen, formed on the grain surfaces, within the ices and voids inside the grain pores. Trapping of H2 in this way may indicate that other volatiles, such as inert gases not included in these models, could be trapped within dust-grain porous structures when ices begin to form.
description: 26 pages, 8 figures, 5 tables
Contacts, equilibration, and interactions in fractional quantum Hall edge transport
Creators: name: Spånslätt, C.
name: Gefen, Yuval
name: Gornyi, I. V.
name: Polyakov, D. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study electron transport through a multichannel fractional quantum Hall edge in the presence of both interchannel interaction and random tunneling between channels, with emphasis on the role of contacts. The prime example in our discussion is the edge at filling factor 2/3 with two counterpropagating channels. Having established a general framework to describe contacts to a multichannel edge as thermal reservoirs, we particularly focus on the line-junction model for the contacts and investigate incoherent charge transport for an arbitrary strength of interchannel interaction beneath the contacts and, possibly different, outside them. We show that the conductance does not explicitly depend on the interaction strength either in or outside the contact regions (implicitly, it only depends through renormalization of the tunneling rates). Rather, a long line-junction contact is characterized by a single parameter which defines the modes that are at thermal equilibrium with the contact and is determined by the interplay of various types of scattering beneath the contact. This parameter -- playing the role of an effective interaction strength within an idealized model of thermal reservoirs -- is generically nonzero and affects the conductance. We formulate a framework of fractionalization-renormalized tunneling to describe the effect of disorder on transport in the presence of interchannel interaction. Within this framework, we give a detailed discussion of charge equilibration for arbitrarily strong interaction in the bulk of the edge and arbitrary effective interaction characterizing the line-junction contacts.
description: 31 pages, 10 figures; comment added
Inclusive gluon production in the dipole approach: AGK cutting rules
Creators: name: Levin, E.
name: Prygarin, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider single gluon production in the dipole model and reproduce the result of Kovchegov and Tuchin for the adjoint (gluonic) dipole structure of the inclusive cross section. We show the validity of the adjoint dipole structure to any order of evolution deriving and solving the non-linear evolution for the non-diagonal cross section of a dipole scattering off the target. The form of the solution to this equation restores the dipole interpretation for non-diagonal cross sections, that appear in gluon production. Using this formalism, we analyse the single inclusive production cross section in terms of the contributions of different multiplicities, and we derive the Abramovskii-Gribov-Kancheli(AGK) cutting rules for two Pomeron exchange. The cutting rules, which were found in this formalism, fully reproduce the original AGK rules for the total cross section. However, for the case of gluon production, the AGK rules are violated already for one gluon emission from the vertex.
description: 32 pages, 16 figures
Extrema of low eigenvalues of the Dirichlet-Neumann Laplacian on a disk
Creators: name: Legendre, Eveline
Publisher: name: arXiv
Year: 2007
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 35J25, 35P15

description: We study extrema of the first and the second mixed eigenvalues of the Laplacian on the disk among some families of Dirichlet-Neumann boundary conditions. We show that the minimizer of the second eigenvalue among all mixed boundary conditions lies in a compact 1-parameter family for which an explicit description is given. Moreover, we prove that among all partitions of the boundary with bounded number of parts on which Dirichlet and Neumann conditions are imposed alternately, the first eigenvalue is maximized by the uniformly distributed partition.
description: 13 pages, 6 figures
Constraining Unparticle Physics with Cosmology and Astrophysics
Creators: name: Davoudiasl, Hooman
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It has recently been suggested that a scale invariant "unparticle" sector with a non-trivial infrared fixed point may couple to the Standard Model (SM) via higher dimensional operators. The weakness of such interactions hides the the unparticle phenomena at low energies. We demonstrate how cosmology and astrophysics can place significant bounds on the strength of unparticle-SM interactions. We also discuss the possibility of a having a non-negligible unparticle relic density today.
description: 4 pages, RevTex4. Two figures and a reference added. Some minor changes. Main results and conclusions unchanged. Version accepted for publication by PRL
Art experience in a group setting : a study of four young subjects
Creators: name: Lackey, Lara Marie
Publisher: name: University of British Columbia
Year: 2010

description: This thesis provides an analysis of video recordings and written observations of four preschool-aged children as they spontaneously explored art materials within a group setting. The focus of analysis is the extent to which subjects interacted with other children and adults during art material use, and the effect of interaction on the subjects' uses of materials. For each subject, data are categorized and presented according to location, type, and approximate length of activity; presence or absence of others; and types of interactive behavior: watching, verbal interaction; imitation; and distraction from the activity. Descriptive passages are presented which detail specific episodes of interaction, and behaviors of adults interacting with subjects are also described. The conclusions argue for heightened awareness of social interaction as a factor in children's art experiences.