cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Naples vertical. "Deep holes" in a porous city
Creators: name: Michalsky, Tanja
Publisher: name: Columbia University
Year: 2018
Subjects: subject: History
subject: Architecture
subject: FOS: Civil engineering
subject: City planning

description: The project presented here deals with the question of how to describe the historical structure and stratification of Naples with the help of maps and texts. Particular attention is paid to the term 'porosity', which was referred to in the 1920s by Walter Benjamin and Asja Lacis on Naples and requires a historical classification.
Towards Conceptual Multidimensional Design in Decision Support Systems
Creators: name: Teste, Olivier
Publisher: name: arXiv
Year: 2010
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Multidimensional databases support efficiently on-line analytical processing (OLAP). In this paper, we depict a model dedicated to multidimensional databases. The approach we present designs decisional information through a constellation of facts and dimensions. Each dimension is possibly shared between several facts and it is organised according to multiple hierarchies. In addition, we define a comprehensive query algebra regrouping the more popular multidimensional operations in current commercial systems and research approaches. We introduce new operators dedicated to a constellation. Finally, we describe a prototype that allows managers to query constellations of facts, dimensions and multiple hierarchies.
On Zone-Based Analysis of Duration Probabilistic Automata
Creators: name: Maler, Oded
name: Larsen, Kim G.
name: Krogh, Bruce H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We propose an extension of the zone-based algorithmics for analyzing timed automata to handle systems where timing uncertainty is considered as probabilistic rather than set-theoretic. We study duration probabilistic automata (DPA), expressing multiple parallel processes admitting memoryfull continuously-distributed durations. For this model we develop an extension of the zone-based forward reachability algorithm whose successor operator is a density transformer, thus providing a solution to verification and performance evaluation problems concerning acyclic DPA (or the bounded-horizon behavior of cyclic DPA).
description: In Proceedings INFINITY 2010, arXiv:1010.6112
title: USING PESTEL ANALYSIS IN THE MANAGEMENT  OF HEALTHCARE INSTITUTIONS
Creators: name: Bokova, Rimma D.
name: Kosinova, Natal'ya N.
Publisher: name: Astrakhan State Medical University
Year: 2021

description: Abstract. In modern socio-economic conditions, the activity of almost any enterprise is aimed at improving financial performance with the parallel development of social aspects. Making a profit in this case is largely due to the peculiarities of the functioning of the macroeconomic business environ-ment. The article examines the healthcare sector of the Russian Federation and on the basis of the State Medical Institution «City Polyclinic No. 5» from the standpoint of the main macroeconomic factors that influence it. The purpose of the study is to study the methodology and methodology of using PESTEL analysis, to iden-tify indicators and characteristics of the external environment, as well as to study it taking into account the main six factors (political, economic, socio-cultural, technological, environmental and legal). The specifics of the impact of these factors on health care is that a medical organization cannot influence them, but it is obliged to take them into account in its activities. Conducting an analysis of the risks and opportunities that manifest themselves in the factors of the PESTEL analysis that affect the organ-ization of the work of the polyclinic will allow the author to give examples of possible administrative measures to optimize the work of the State Budgetary Institution «City Polyclinic No. 5», taking into account the macroeconomic factors of the environment. This will allow the management of the health care institution to make balanced and effective management decisions aimed at optimizing the work of the medical organization. Key words: PESTEL-analysis, digital transformation, management system, data transmission, macroeconomic factors of the external environment.
Keldysh effective action theory for universal physics in spin-1/2 Kondo dots
Creators: name: Smirnov, Sergey
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Kondo effect, quantum dots, nonequilibrium, effective field theory
subject: 530 Physik
subject: 73.63.Kv
subject: 72.10.Fk
subject: 72.15.Qm

description: We present a theory for the Kondo spin-1/2 effect in strongly correlated quantum dots. The theory is applicable at any temperature and voltage. It is based on a quadratic Keldysh effective action parameterized by a universal function. We provide a general analytical form for the tunneling density of states through this universal function for which we propose a simple microscopic model. We apply our theory to the highly asymmetric Anderson model with $U=\infty$ and describe its strong coupling limit, weak coupling limit and crossover region within a single analytical expression. We compare our results with numerical renormalization group in equilibrium and with a real-time renormalization group out of equilibrium and show that the universal shapes of the linear and differential conductance obtained in our theory and in these theories are very close to each other in a wide range of temperatures and voltages. In particular, as in the real-time renormalization group, we predict that at the Kondo voltage the differential conductance is equal to $2/3$ of its maximum.
Is There a Typology of Teacher and Leader Responders to CALL, and Do They Cluster in Different Types of Schools? A Two-Level Latent Class Analysis of CALL Survey Data
Creators: name: Bowers, Alex J.
name: Blitz, Mark
name: Modeste, Marsha
name: Salisbury, Jason
name: Halverson, Richard
Publisher: name: Columbia University
Year: 2017
Subjects: Educational leadership
Leadership
Multivariate analysis
School principals
Teachers
Educational surveys

description: Background: Across the recent research on school leadership, leadership for learning has emerged as a strong framework for integrating current theories, such as instructional, transformational, and distributed leadership as well as effective human resource practices, instructional evaluation, and resource allocation. Yet, questions remain as to how, and to what extent teachers and leaders practice the skills and tasks that are known to be associated with effective school leadership, and to what extent do teachers and leaders agree that these practices are taking place in their school.
Purpose of the Study: We examine these issues through applying a congruency-typology model to the validation sample of the Comprehensive Assessment of Leadership for Learning (CALL), (117 schools across the US, including 3,367 teachers and their school leaders) to examine the extent to which there may be significantly different subgroups of teacher and leader responders to the survey, how these subgroups may cluster non-randomly in schools, and to what extent the subgroups of teachers and principals are aligned or not on their perception that the skills and practices of leadership for learning take place in their school.
Research Design: We used multilevel latent class analysis (LCA) to identify significantly different types of teacher and leader responders to CALL, including a cross-level interaction to examine the extent to which there is a typology model of teacher responders across schools and the extent to which the teacher subgroup responses align with the leader of the school.
Findings: We find that there are three statistically significant different subgroups of teacher responders to CALL, Low (31.4%), Moderate (43.3%), and High (25.4%). In addition, these subgroups cluster non-randomly across three different types of schools: schools with low leadership for learning (40.2%), moderate leadership for learning (47.0%), and the smallest subgroup, schools with high leadership for learning (12.8%).
Conclusions: Our findings suggest that a congruency-typology model of leadership for learning is useful for understanding the context of practice, as schools may be on a continuum of practice in which there is strong alignment between teacher and leader responder types in the low and high schools – indicating problematic or beneficial contexts – but that leaders in the moderate type may be working to move their school towards instructional improvement through leadership for learning. As a quantitative phenomenology, this study provides a rich contextual analysis of the relationship between teachers and leaders on a multisource feedback survey of leadership for learning in schools.
Minkowski Tensors of Anisotropic Spatial Structure
Creators: name: Schröder-Turk, Gerd E.
name: Mickel, Walter
name: Kapfer, Sebastian C.
name: Schaller, Fabian M.
name: Breidenbach, Boris
name: Hug, Daniel
name: Mecke, Klaus
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This article describes the theoretical foundation of and explicit algorithms for a novel approach to morphology and anisotropy analysis of complex spatial structure using tensor-valued Minkowski functionals, the so-called Minkowski tensors. Minkowski tensors are generalisations of the well-known scalar Minkowski functionals and are explicitly sensitive to anisotropic aspects of morphology, relevant for example for elastic moduli or permeability of microstructured materials. Here we derive explicit linear-time algorithms to compute these tensorial measures for three-dimensional shapes. These apply to representations of any object that can be represented by a triangulation of its bounding surface; their application is illustrated for the polyhedral Voronoi cellular complexes of jammed sphere configurations, and for triangulations of a biopolymer fibre network obtained by confocal microscopy. The article further bridges the substantial notational and conceptual gap between the different but equivalent approaches to scalar or tensorial Minkowski functionals in mathematics and in physics, hence making the mathematical measure theoretic method more readily accessible for future application in the physical sciences.
ปัจจัยของโครงสร้างเงินทุนและการบริหารเงินทุนหมุนเวียนที่ส่งผลต่อความสามารถในการทำกำไรของบริษัทกลุ่มอุตสาหกรรมอสังหาริมทรัพย์และก่อสร้างที่จดทะเบียนในตลาดหลักทรัพย์แห่งประเทศไทย
Creators: name: ธมลวรรณ กุลวิจิตร
Publisher: name: Faculty of Management Technology, Rajamangala University of Technology Isan, Surin Campus
Year: 2024
Subjects: การบริหารเงินทุนหมุนเวียน
ความสามารถในการทำกำไร
โครงสร้างเงินทุน

description: วารสารวิชาการเทคโนโลยีการจัดการ, 5, 2, 1-14
UV-protected (Natural) Inflation: Primordial Fluctuations and non-Gaussian Features
Creators: name: Germani, Cristiano
name: Watanabe, Yuki
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the UV-protected inflation, where the inflaton potential is obtained by quantum (one-loop) breaking of a global symmetry into a discrete symmetry. In this model, all coupling scales are sub-Planckian. This is achieved by coupling the inflaton kinetic term to the Einstein tensor such that the friction is enhanced gravitationally at high energies. In this respect, this new interaction makes virtually any potential adequate for inflation while keeping the system perturbative unitary. We show that even if the gravitationally enhanced friction intrinsically contains new nonlinearities, the UV-protected inflation (and any similar models) behaves as a single field scenario with red tilted spectrum and potentially detectable gravitational waves. Interestingly enough, we find that non-Gaussianity of the curvature perturbations in the local form are completely dominated by the nonlinear gauge transformation from the spatially flat to uniform-field gauge and/or by parity violating interactions of the inflaton and gauge bosons. In particular, the parity violating interactions may produce detectable non-Gaussianity.
description: typos in equation (7.22) fixed; other results unchanged. Addendum-ibid.1107:A01,2011
Wall slip of polydisperse linear polymers : effects of molecular weight characteristics, and surface conditions
Creators: name: Ebrahimi, Marzieh
Publisher: name: University of British Columbia
Year: 2017

description: The classical no-slip boundary condition of fluid mechanics is not always a valid assumption for the flow of complex fluids including polymer melts. Since the slip velocity of polymer melts complicates analysis of rheological data and it is needed for simulation of polymer processes and process optimization, a comprehensive predictive slip velocity model should be developed. In this thesis, the slip behavior of monodisperse and polydisperse linear polymers including high-density polyethylenes (HDPEs), polybutadienes (PBDs), and polystyrenes (PSs) is studied to fully understand the effect of molecular weight (MW) and molecular weight distribution (MWD). Concepts from double reptation mixing rule are used to develop an expression for slip velocity of polydisperse polymers based on their MW and MWD. Very good agreement between experimental data and predictions of proposed model is observed, validating the applicability of the model. Surface enrichment of short chains next to solid boundaries due to entropic effects complicates slip analysis specially in the case of bimodal polymers. To address surface segregation, the slip behavior of several HDPEs with broad range of molecular weight including bimodals is studied. Moreover, the developed slip model coupled with a model of surface molecular weight fractionation is used to predict the slip velocity of the studied polymers. It is observed that surface fractionation has a minor effect on slip of narrow to moderate MWD polymers (particularly unimodal), but its role is significant for broad bimodal polymers. Moreover, the dynamic slip behavior of a polymer melt was investigated by performing dynamic shear experiments using the stress/strain controlled rotational rheometer equipped with parallel partitioned plate geometry. The multimode integral Kaye-Bernstein-Kearsley-Zapas (KBKZ) constitutive model is applied and it is found that a dynamic slip model with a slip relaxation time is needed to adequately predict the experimental data at large shear deformations. Finally, the effects of surface topology and energy on slip velocity of high-density HDPEs was studied using treated and untreated smooth and patterned slit dies. It was found that the slip velocity is decreased by roughness and is increased by silanization. These effects have been incorporated into the slip velocity model.
Columbia World Projects Cybersecurity Forum Report
Creators: name: Columbia World Projects
Publisher: name: Columbia University
Year: 2018
Subjects: Computer security
Internet
Internet--Security measures
Elections--Data processing
Social media

description: It is precisely because of the indispensable role the Internet plays in our lives that disruptions to the systems, and networks that undergird them, can rapidly bring so much of what we do to a standstill, undermine our privacy and civil liberties, and even threaten our prosperity and national security. And of course, it is not just systems that are connected to the Internet that are vulnerable to digital attack – so too are standalone systems, networks, and programs. While it is difficult to measure the precise level of exposure in this realm, there is a clear consensus that cybersecurity is one of the most significant and complex challenges facing the world today. To give just a few examples, the U.S. Director of National Intelligence said cybersecurity is one of his “greatest concerns and top priorities.” The U.S. Homeland Security Secretary’s has assessed that cyberweapons and sophisticated hacking pose a greater threat to the United States than the risk of physical attacks. Freedom House concluded that digital disinformation tactics have contributed to a global decline in Internet freedom every year for the last seven years, and played an important role in elections in at least 18 countries from 2016 to 2017 alone. And estimates regarding the global economic impact of cyber attacks range from $400 billion to more than $2 trillion each year. So too is there is a growing recognition that technology solutions alone cannot address the many vulnerabilities and possible vectors of attack, but rather that behavioral, normative, regulatory, social, and other interventions will also be critical to building effective solutions. Yet, despite these high-level warnings and the fact that a fair amount of attention and resources have been devoted in the last several years to cybersecurity, the increasing sophistication of cyber threats continues to outpace progress, as does the number of attacks, particularly in the United States and in Europe.

It was with this understanding – that current efforts to address cybersecurity are insufficient – that participants in the Columbia World Projects (CWP) Forum on Cybersecurity began their opening plenary discussion. Approximately 35 experts with a range of different substantive and institutional perspectives shared their views on the nature of the threat, key vulnerabilities, and the particularly intractable challenges associated with addressing them. This discussion provided critical context for the concrete project proposals taken up later in the working groups (Section II), and helped inform the selection of projects meriting further development by CWP (Section III).
Multicolor Upconversion Nanoparticles for Protein Conjugation
Creators: name: Wilhelm, Stefan
name: Hirsch, Thomas
name: Patterson, Wendy M.
name: Scheucher, Elisabeth
name: Mayr, Thorsten
name: Wolfbeis, Otto S.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Upconversion luminescence, nanoparticle, silica coating, Raman spectroscopy, biosensing, magnetic separation, surface plasmon resonance
subject: 540 Chemie

description: We describe the preparation of monodisperse, lanthanide-doped hexagonal-phase NaYF4 upconverting luminescent nanoparticles for protein conjugation. Their core was coated with a silica shell which then was modified with a poly(ethylene glycol) spacer and N-hydroxysuccinimide ester groups. The nanoparticles were characterized by transmission electron microscopy, Raman spectroscopy, X-ray diffraction, and dynamic light scattering. The N-hydroxysuccinimide ester functionalization renders them highly reactive towards amine nucleophiles (e.g., proteins). We show that such particles can be conjugated to proteins. The protein-reactive UCLNPs and their conjugates to streptavidin and bovine serum albumin display multicolor emissions upon 980-nm continuous wave laser excitation. Surface plasmon resonance studies were carried out to prove bioconjugation and to compare the affinity of the particles for proteins immobilized on a thin gold film.
Columbia World Projects First Forum Report on Inequality: Unequal Opportunity
Creators: name: Columbia World Projects
Publisher: name: Columbia University
Year: 2018
Subjects: Equality--Economic aspects
Equality--Government policy
Early childhood education
Water-supply--Management
Manpower policy

description: This report is the first in a series of inequality reports to be issued by Columbia World Projects (CWP), summarizing expert discussions held on different aspects of economic inequality, in an effort to identify concrete, implementable ideas for how academics and practitioners might partner to better understand and address the challenge. CWP intends to hold a number of convenings on this subject over the next several years, given the complex and critical nature of the problems associated with inequality in the world today
.
This first expert discussion or “Forum” on the subject was focused on the relationship between inequality and unequal opportunity. There are certain levels of economic inequality that are so severe that they deprive people not only of a path to greater mobility, but also of a range of basic
resources – such as housing, education, labor, and health – that can close off opportunities all people should have, regardless of their level of wealth or income. Such unequal access may begin to limit an individual’s opportunities as early as when she is still in the womb and has the capacity to produce negative outcomes that last a lifetime, or even across generations. Thus, on June 19, 2018, more than 30 experts from government, multilateral institutions, nongovernmental and philanthropic organizations, the private sector, the media, and academia, among other fields, came together to discuss concrete ideas for how to make headway against unacceptable, unequal access, how to scale such solutions more broadly, and how to provide a foundation for shifts in government policy where results are proven.

The structure of this report follows the sequence of the Forum itself: It begins by summarizing the main insights on the challenge that emerged in the opening discussion (Section III); then it provides an overview of the project ideas that were discussed when the Forum’s participants broke out into thematic working groups(Section IV); and it concludes with the closing plenary, in which participants expressed their views on which ideas were most promising (Section V).
Living with Heart Failure during the COVID-19 Pandemic: An Interpretative Phenomenological Analysis.
Creators: name: Trenta, Alessia Martina
name: Ausili, Davide
name: Caruso, Rosario
name: Arrigoni, Cristina
name: Moro, Massimo
name: Nania, Tiziana
name: Vellone, Ercole
name: Dellafiore, Federica
Publisher: name: Zenodo
Year: 2022
Subjects: coronavirus disease 2019
heart failure
interpretative phenomenological analysis
lived experience
qualitative study

description: PDF Data Interview from Trenta AM, Ausili D, Caruso R, Arrigoni C, Moro M, Nania T, Vellone E, Dellafiore F. Living with Heart Failure during the COVID-19 Pandemic: An Interpretative Phenomenological Analysis. Clin Nurs Res. 2021 Sep;30(7):1071-1078. doi: 10.1177/10547738211016614. Epub 2021 May 19. PMID: 34008447. Abstract This study aimed to explore lived experience of patients with heart failure (HF) during the COVID-19 pandemic. A qualitative study was conducted using an interpretative phenomenological analysis (IPA). Data collection performed in March-May 2020, using in-depth, semi-structured interviews on a purposive sample. Data were analyzed according to the IPA methodology, and triangulation, bracketing, journaling, and member checking were used to assure rigor. 14 patients with HF were enrolled, and three main themes described their lived experience during the COVID-19 pandemic: Vulnerability, Hanging in the balance, and Coping strategies. These people felt particularly vulnerable to the novel virus and experienced uncertainty due to hospital organization changes. Because of this, they felt like they were hanging in the balance, experiencing various negative feelings. Nevertheless, they managed to deal with this challenging situation by implementing some peculiar coping strategies. The COVID-19 represents a significant challenge for patients with HF, impacting significantly on their lives.
ปัจจัยการตัดสินใจซื้อสินค้าโลกเสมือน Virtual Reality (VR) ของวัยรุ่น
Creators: name: ปัณณธร บุญผ่อง
Publisher: name: Faculty of Management Technology, Rajamangala University of Technology Isan, Surin Campus
Year: 2024
Subjects: การรับรู้
การตัดสินใจซื้อ
ความตั้งใจ
โลกเสมือน
ส่วนประสมทางการตลาด

description: วารสารวิชาการเทคโนโลยีการจัดการ, 5, 2, 15-28
Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO₂-laser
Creators: name: Jiang, Chongyun
name: Shalygin, V. A.
name: Panevin, V. Yu.
name: Danilov, Sergey N.
name: Glazov, M. M.
name: Yakimova, R.
name: Lara-Avila, S.
name: Kubatkin, S.
name: Ganichev, Sergey
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik
subject: 73 . 50 . Pz, 72 . 80 . Vp, 81 . 05 . ue, 78 . 67 . Wj

description: We report the study of the helicity-driven photocurrents in graphene excited by midinfrared light of a CO₂ laser. Illuminating an unbiased monolayer sheet of graphene with circularly polarized radiation generates— under oblique incidence—an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. We show that the current is caused by the interplay of the circular ac Hall effect and the circular photogalvanic effect. By studying the frequency dependence of the current in graphene layers grown on the SiC substrate, we observe that the current exhibits a resonance at frequencies matching the longitudinal optical phonon in SiC.
Mechanical Mixing of Garnet Peridotite and Pyroxenite in the Orogenic Peridotite Lenses of the Tvaerdal Complex, Liverpool Land, Greenland Caledonides
Creators: name: Brueckner, Hannes K.
name: Medaris, L. Gordon
name: Griffin, William L.
name: Johnston, Scott M.
name: Hartz, Ebbe H.
name: Pearson, Norman
name: Cai, Yue
name: Andresen, Arild
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: Metamorphic rocks
subject: Igneous rocks
subject: Pyroxenite
subject: Peridotite

description: The Tvaerdal Complex is an eclogite-bearing metamorphic terrane in Liverpool Land at the southern tip of the Greenland Caledonides. It is a Baltic terrane that was transferred to Laurentia during the Scandian orogeny. It exposes a few small garnet dunite and harzburgite lenses, some containing parallel layers of garnet pyroxenite and peridotite (including lherzolite). Sm–Nd mineral ages from the pyroxenites indicate recrystallization occurred at the same time (≈405 Ma) as eclogite recrystallization in the enclosing gneiss. Geothermobarometry indicates these eclogites and pyroxenites shared a similar pressure-temperature history. This congruent evolution suggests pyroxenite-bearing peridotite lenses were introduced from a mantle wedge into subducted Baltic continental crust and subsequently shared a common history with this crust and its eclogites during the Scandian orogeny. Some garnet peridotite samples contain two garnet populations: one Cr-rich (3·5–6·2 wt % Cr2O3) and the other Cr-poor (0·2–1·4 wt %). Sm–Nd analyses of two such garnet peridotites define two sets of apparent ages: one older (>800 Ma) for Cr-rich garnets and the other younger (<650 Ma) for Cr-poor garnets. We propose that the younger Cr-poor garnets were derived from fractured and disaggregated garnet pyroxenite layers (i.e. are M2) and were mixed mechanically with older (i.e. M1) garnets of the host peridotite during intense Scandian shearing. Mechanical mixing may be an important mantle process.
Symmetry Dependence of Vibration-Assisted Tunneling
Creators: name: Pavliček, Niko
name: Swart, Ingmar
name: Niedenführ, Judith
name: Meyer, Gerhard
name: Repp, Jascha
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik
subject: 8.37.Ef
subject: 73.40.Gk
subject: 63.22. m
subject: 73.63. b

description: We present spatially resolved vibronic spectroscopy of individual pentacene molecules in a double-barrier tunneling junction. It is observed that even for this effective single-level system the energy dissipation associated with electron attachment varies spatially by more than a factor of 2. This is in contrast to the usual treatment of electron-vibron coupling in the Franck-Condon picture. Our experiments unambiguously prove that the local symmetry of initial and final wave function determines the dissipation in electron transport.
Spin-dependent electronic processes and long-lived spin coherence of deep-level trap sites in CdS nanocrystals
Creators: name: van Schooten, K. J.
name: Huang, J.
name: Talapin, D. V.
name: Boehme, C.
name: Lupton, J. M.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: Carrier trapping in colloidal nanocrystals represents a major energy loss mechanism for excitonic states crucial to devices. Surprisingly little is known about the influence of the spin degree of freedom on the nature of these intrinsic trap centers or the types of coupling that these states experience. Here, a pulsed microwave optically detected magnetic resonance study is presented that aims to probe the interaction pathways existing between shallow band-edge trap states and the deep-level emissive chemical defect states responsible for the broad, low-energy emission common to CdS nanocrystals. Due to long spin coherence times (T2) of these states, Rabi flopping detected in the luminescence under magnetic resonance provides access to information regarding the modes of coupling of shallow-trapped electron-hole pairs, both of isolated species and of those in proximity to the emissive defect. Corresponding optically detected spin-echo experiments expose an extraordinarily long intrinsic spin coherence time (T2≈1.6 μs) for colloidal nanocrystals, and an electron spin-echo envelope modulation indicative of local spin interactions. This effect provides opportunities for gaining the detailed chemical and structural information needed in order to eliminate energy loss mechanisms during the synthetic process.
Efficient and accurate geometric simulation of multi-axis milling operations
Creators: name: Joy, Jimin
Publisher: name: University of British Columbia
Year: 2018

description: Geometric modeling is an essential part of process planning and verification step in the modern manufacturing practice that employs complex operations such as multi-axis milling. Geometric modeling by itself is used for tool path generation and verification. It is also essential to create important input for mechanistic simulation. Due to this great relevance, many geometric modeling methods have been employed for machining simulation. However it is still a challenge to obtain acceptable combination of accuracy, efficiency and robustness from most of the existing methods. The best known modeling methods also appear to have reached a saturation point. Yet the industrial machining cases are ever increasing in complexity and it demands for a faster method maintaining the acceptable level of accuracy. This thesis presents an enhanced voxel representation format for modeling the machined workpiece geometry in general milling operations. The modeling format is named as Frame-Sliced Voxel representation (FSV-rep) as it uses a novel concept of frame-sliced voxels to represent the boundary of the workpiece volume in a multi-level surface voxel representation for memory-efficient implementation. Frame-sliced voxels enables approximation of the workpiece surface to achieve sub-voxel details. This thesis further identifies an efficient three-step update process that can be followed to compute machined part geometry from an initial FSV-rep workpiece model and set of tool paths. To be computationally feasible and yet robustly handling all tool path types, suitable swept volume representations are identified for various tool path categories. The three-step update process is then used in customized ways for the different categories to utilize the salient features of each. A robust and efficient approach to generate standard surface representation of the machined part geometry from the updated FSV-rep model is also developed. Results show that the FSV-rep model is able to provide acceptable accuracy levels while being significantly faster than popular modeling methods for machined part geometry computation in general multi-axis machining. The specialized swept volume representation identified for planar and 3-axis straight cut operations is further improving the FSV-rep update performance to be up to an order of magnitude faster than possible with general sampled swept volume representations.
Local interaction scale controls the existence of a non-trivial optimal critical mass in opinion spreading
Creators: name: Wu, Zhi-Xi
name: Holme, Petter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We study a model of opinion formation where the collective decision of group is said to happen if the fraction of agents having the most common opinion exceeds a threshold value, a \textit{critical mass}. We find that there exists a unique, non-trivial critical mass giving the most efficient convergence to consensus. In addition, we observe that for small critical masses, the characteristic time scale for the relaxation to consensus splits into two. The shorter time scale corresponds to a direct relaxation and the longer can be explained by the existence of intermediate, metastable states similar to those found in [P.\ Chen and S.\ Redner, Phys.\ Rev.\ E \textbf{71}, 036101 (2005)]. This longer time-scale is dependent on the precise condition for consensus---with a modification of the condition it can go away.
description: 4 pages, 6 figures
Plasmons in spin-orbit coupled two-dimensional hole gas systems
Creators: name: Scholz, Andreas
name: Dollinger, Tobias
name: Wenk, Paul
name: Richter, Klaus
name: Schliemann, John
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: We study the dynamical dielectric function of a two-dimensional hole gas, exemplified on [001] GaAs and InAs quantum wells, within the Luttinger model extended to the two lowest subbands including bulk and structure inversion asymmetric terms. The plasmon dispersion shows a pronounced anisotropy for GaAs- and InAs-based systems. In GaAs this leads to a suppression of plasmons due to Landau damping in some orientations. Due to the large Rashba contribution in InAs, the lifetime of plasmons can be controlled by changing the electric field. This effect is potentially useful in plasmon field effect transistors as previously proposed for electron gases.
Na3SbS3: Single Crystal X-ray Diffraction, Raman Spectroscopy, and Impedance Measurements
Creators: name: Pompe, Constantin
name: Pfitzner, Arno
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 540 Chemie

description: Na3SbS3 was prepared by the reaction of anhydrous Na2S, antimony, and sulfur in a ratio of 3:2:3 at 870 K. The pale yellow compound is air and moisture sensitive. A microcrystalline sample was obtained after annealing Na3SbS3 for two weeks at 720 K. The crystal structure of Na3SbS3 was determined by single-crystal X-ray diffraction at 123 K. Na3SbS3 crystallizes in the cubic space group P213 (No. 198) with a = 8.6420(1) Å, V = 645.42(1) Å3 and Z = 4. The structure refinement converged to R = 0.0099 (wR = 0.0181) for 592 independent reflections and 23 parameters. Na3SbS3 is isotypic with Na3AsS3. Sodium atoms are located on three different sites, which show a strongly distorted octahedral coordination sphere of sulfur. The coordination polyhedra of equivalent sodium sites share common vertices, whereas those of different sodium sites share common faces. Antimony and sulfur form trigonal SbS3 pyramids, which coordinate sodium as a mono-, bi-, or tridentate ligand. Raman spectroscopic investigations result in stretching modes ν(Sb–S) at 334, 321, and 312 cm–1, respectively. Thermoanalytical studies do not show any additional thermal effects up to the melting point of 875 K. Impedance spectroscopy on Na3SbS3 in a range from 325 to 570 K shows a temperature dependent Na+ conductivity, which is 1.9 × 10–6 Ω–1·cm–1 at 570 K.
Eclogites in peridotite massifs in the Western Gneiss Region, Scandinavian Caledonides: Petrogenesis and comparison with those in the Variscan Moldanubian Zone
Creators: name: Medaris, L. Gordon
name: Brueckner, Hannes K.
name: Cai, Yue
name: Griffin, William L.
name: Janák, Marian
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: Petrogenesis
subject: Metamorphic rocks
subject: Igneous rocks
subject: Eclogite
subject: Peridotite

description: Eclogite lenses and boudins are volumetrically minor, but petrologically important, features of peridotite massifs worldwide. In the Western Gneiss Region of the Scandinavian Caledonides, eclogites in the Almklovdalen and Raubergvik peridotites originated as basaltic to picrobasaltic dikes, comprising both olivine–normative and nepheline–normative types, with a wide variation in Mg–number from 34 to 65. Positive anomalies for Pb and Sr and negative anomalies for Zr and Hf reflect a subduction signature in the basic melts, and rare–earth element modelling requires 20% to 70% fractional crystallization, combined with 20% to 70% assimilation of peridotite. Clinopyroxenes in eclogites have a wide variation in εNd(0) from +68 to −26, which is comparable to that for associated garnet peridotites and pyroxenites, +55 to −38, and a range in 87Sr/86Sr from 0.7021 to 0.7099, which is much larger than that in peridotites and pyroxenites, 0.7014 to 0.7033. Plagioclase and amphibole inclusions in eclogite garnet provide evidence for prograde metamorphism, which attained a maximum temperature of ~775 °C and pressure of ~25 kb. Such conditions are allofacial with those of associated garnet peridotites and pyroxenites, which equilibrated at ~825 °C and ~37 kb. Eclogites yield mixed Sm-Nd isochron ages, as do the peridotites and pyroxenites, but ages in eclogites are <1000 Ma, and those in peridotites and pyroxenites are >1000 Ma. Three eclogites yield Ordovician U-Pb ages for rutile at 440 ± 12, 445 ± 51, and 480 ± 29 Ma, which are coeval with the Taconic Orogeny and are consistent with a Laurentian provenance for the host peridotites. Eclogites in both Norwegian and Czech peridotites originated from melts passing through a mantle wedge above a subduction zone, and both suites exhibit subduction geochemical signatures, although they differ dramatically in petrogenesis. Eclogites in Norwegian peridotites initially crystallized as relatively low–pressure, plagioclase–bearing basaltic or gabbroic dikes and subsequently recrystallized to high–pressure eclogite, whereas most eclogites in Variscan Moldanubian peridotites crystallized directly from magmas at high pressure to produce eclogite facies assemblages.
การวิเคราะห์ศักยภาพอาหารพื้นถิ่นเพื่อสนับสนุนการท่องเที่ยวเชิงอาหารในจังหวัดสุรินทร์ กรณีศึกษา ตำบลกระโพ อำเภอท่าตูม จังหวัดสุรินทร์
Creators: name: อลิศรา ธรรมบุตร
Publisher: name: Faculty of Management Technology, Rajamangala University of Technology Isan, Surin Campus
Year: 2024
Subjects: การท่องเที่ยวเชิงอาหาร
ศักยภาพอาหารพื้นถิ่น
จังหวัดสุรินทร์

description: วารสารวิชาการเทคโนโลยีการจัดการ, 5, 2, 29-44
Quantitative progression of retinitis pigmentosa by optical coherence tomography angiography
Creators: name: Jauregui, Ruben
name: Park, Karen Sophia
name: Duong, Jimmy
name: Mahajan, Vinit B.
name: Tsang, Stephen H.
Publisher: name: Columbia University
Year: 2018
Subjects: Retinitis pigmentosa
Optical coherence tomography
Retina--Blood-vessels--Radiography
Medicine--Research

description: Optical coherence tomography angiography (OCT-A) is a non-invasive alternative to fluorescein angiography that allows for the study of the retinal and choroidal vasculatures. In this retrospective cohort study of 28 patients with retinitis pigmentosa (RP), we used OCT-A to quantify changes in perfusion density, foveal avascular zone (FAZ) area, and choriocapillaris blood flow over time and correlated these variables with ellipsoid zone (EZ) line width and best-corrected visual acuity (BCVA). Perfusion density decreased by 2.42 ± 0.62% per year at the superior capillary plexus (SCP) (P = 0.001) and 2.41 ± 0.76% per year at the deep capillary plexus (DCP) (P = 0.004). FAZ area increased by 0.078 ± 0.021 mm2 per year (P = 0.001) at the SCP and 0.152 ± 0.039 mm2 per year (P = 0.001) at the DCP. No changes were observed in the choriocapillaris blood flow. EZ line width had the strongest correlation to perfusion density at the SCP (r = 0.660 and 0.635, first and second visit, respectively, P = 0.001), while BCVA most strongly correlated with FAZ area at the SCP (r = 0.679 and 0.548, P = 0.001 and 0.003). Our results suggest that OCT-A is a useful tool for monitoring RP disease progression and may be used to measure retinal vascular parameters as outcomes in clinical trials.
Electronic transport properties of double-wall carbon nanotubes
Creators: name: Datta, Subhadeep
name: Wang, Shidong
name: Tilmaciu, Carmen
name: Flahaut, Emmanuel
name: Marty, Laëtitia
name: Grifoni, Milena
name: Wernsdorfer, Wolfgang
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik

description: We studied the discretized electronic spectra of double-wall carbon nanotube (DWCNT) quantum dots (QDs) in the Coulomb-blockade regime. At low temperatures, the stability diagrams show a clear and regular eight-electron periodicity, which is due to the nonzero intershell couplings. Furthermore, the electronic charging energy, the energy level spacing, and the intershell coupling strengths of the measured DWCNT QDs were determined.
D6.3 Demonstration to the EC of the test products resulting from the procured R&D services
Creators: name: Rocca, Giuseppe La
name: Jones, Bob
name: Joao Fernandes
Publisher: name: Zenodo
Year: 2019
Subjects: HNSciCloud, demonstration of pilot services, vouchers

description: This document outlines the three main events where the pilot services resulting from the PCP project have been showcased. Dedicated training sessions, to target the requirements of researchers, technology leaders, experts and novies, have been arranged to provide an update about the current status of the project and learn how vouchers can be used to promote the adoption of pilot servies for limited scale usage. During the last event, at CERN, the solution proposed by EGI to support the long-tail of science users with the HNSciCloud vouchers has been introduced.
A Decidable Characterization of a Graphical Pi-calculus with Iterators
Creators: name: Peschanski, Frédéric
name: Klaudel, Hanna
name: Devillers, Raymond
Publisher: name: arXiv
Year: 2010
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: This paper presents the Pi-graphs, a visual paradigm for the modelling and verification of mobile systems. The language is a graphical variant of the Pi-calculus with iterators to express non-terminating behaviors. The operational semantics of Pi-graphs use ground notions of labelled transition and bisimulation, which means standard verification techniques can be applied. We show that bisimilarity is decidable for the proposed semantics, a result obtained thanks to an original notion of causal clock as well as the automatic garbage collection of unused names.
description: In Proceedings INFINITY 2010, arXiv:1010.6112
Depth profile of strain and composition in Si/Ge dot multilayers by microscopic phonon Raman spectroscopy
Creators: name: Tan, P. H.
name: Bougeard, Dominique
name: Abstreiter, Gerhard
name: Brunner, K.
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We characterized strain and Ge content depending on depth in a self-assembled Si/Ge dot multilayer by scanning a microscopic Raman probe at a (110) cleavage plane. The multilayer structure was deposited by molecular-beam epitaxy on a (001) Si substrate and consisted of 80 periods, each of them composed by 25 nm Si spacers and 8 monolayer Ge forming laterally and vertically uncorrelated islands with a height of 2 nm and a lateral diameter of about 20 nm. An average biaxial strain of -3.5% within the core regions of islands is determined from the splitting of longitudinal and transversal optical Ge-Ge phonon modes observed in polarized Raman measurements. The absolute mode frequencies further enable analysis of a Ge content of 0.82. The analyzed strain and composition of islands are nearly independent from depths below the sample surface. This indicates well-controlled deposition parameters and negligible intermixing during deposition of subsequent layers. These Raman results are in agreement with x-ray diffraction data. Small, local Raman frequency shifts were observed and discussed with respect to partial elastic strain relaxation of the multilayer stack after cleavage, undefined Raman-scattering geometries at the sample edge, and local heating by the laser probe.
Addressing the Failure of Anonymization: Guidance from the European Union’s General Data Protection Regulation
Creators: name: Frasher, Elizabeth
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Law
subject: FOS: Law
subject: Data protection
subject: Anonymous persons
subject: Consumer protection--Law and legislation
subject: Privacy, Right of

description: It is common practice for companies to “anonymize” the consumer data that they collect. In fact, U.S. data protection laws and Federal Trade Commission guidelines encourage the practice of anonymization by exempting anonymized data from the privacy and data security requirements they impose. Anonymization involves removing personally identifiable information (“PII”) from a dataset so that, in theory, the data cannot be traced back to its data subjects. In practice, however, anonymization fails to irrevocably protect consumer privacy due to the potential for deanonymization—the linking of anonymized data to auxiliary information to re-identify data subjects. Because U.S. data protection laws provide safe harbors for anonymized data, re-identified data subjects receive no statutory privacy protections at all—a fact that is particularly troublesome given consumers’ dependence on technology and today’s climate of ubiquitous data collection. By adopting an all-or-nothing approach to anonymization, the United States has created no means of incentivizing the practice of anonymization while still providing data subjects statutory protections. This Note argues that the United States should look to the risk-based approach taken by the European Union under the General Data Protection Regulation. Their data protection laws utilize multiple tiers of anonymization, which vary in their potential for deanonymization. Under this approach, pseudonymized data—i.e., certain data that has had PII removed but can still be linked to auxiliary information to re-identify data subjects—falls within the scope of the governing law, but receives relaxed requirements designed to incentivize pseudonymization and thereby reduce the risk of data subject identification. This approach both strikes a balance between data privacy and data utility, and affords data subjects the benefit of anonymity in addition to statutory protections ranging from choice to transparency.
Shear viscosity to entropy density ratio in nuclear multifragmentation
Creators: name: Pal, Subrata
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nuclear multifragmentation in intermediate energy heavy ion collisions has long been associated with liquid-gas phase transition. We calculate the shear viscosity to entropy density ratio eta/s for an equilibrated system of nucleons and fragments produced in multifragmentation within an extended statistical multifragmentation model. The temperature dependence of eta/s exhibits surprisingly similar behavior as that for water. In the coexistence phase of fragments and light particles, the ratio eta/s reaches a minimum of comparable depth as that for water in the vicinity of the critical temperature for liquid-gas phase transition. The effects of freeze-out volume and surface symmetry energy on eta/s in multifragmentation are studied.
description: 5 pages, 5 figures, to appear in PRC