cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The economic impact of clinically significant tricuspid regurgitation in a large, administrative claims database
Creators: name: Cork, David P.
name: McCullough, Peter A.
name: Hirsch S. Mehta
name: Barker, Colin M.
name: Houten, Joanna Van
name: Gunnarsson, Candace
name: Ryan, Michael P.
name: Baker, Erin R.
name: Mollenkopf, Sarah
name: Verta, Patrick
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: 60506 Virology
subject: FOS: Biological sciences
subject: Computational Biology

description: Aim: This study aimed to quantify the healthcare burden of clinically significant tricuspid regurgitation (TR) in patients with and without heart failure (HF). Materials and Methods: Data were from the IBM MarketScan Research Databases from October 2011 to September 2016. Eligible patients met the following inclusion criteria: age ≥18 with a TR diagnosis, 12 months pre (baseline), and 6 months post (landmark) medical enrollment. The landmark period was used to categorize TR severity, defined as a record of pulmonary hypertension with ascites, lower extremity edema or hepatic insufficiency, or tricuspid valve surgery. Cohorts were defined based on TR etiology and severity: (1) no HF and no clinically significant TR; (2) HF with no clinically significant TR; (3) no HF with clinically significant TR; and (4) HF with clinically significant TR. Outcomes of interest were all-cause hospitalizations, hospital days, and expenditures. Multivariable models were fit for each of the annualized outcomes and adjusted for patient demographics, comorbidities, and other concomitant valve diseases. Results: There were 92,994 patients eligible for analysis. Patients with no HF and no clinically significant TR had the annualized healthcare burden of 0.20 all-cause hospitalizations (approximately one inpatient hospitalization every 5 years), 1.07 hospital days, and $17,478 in expenditures. The presence of clinically significant TR, alone or with HF, significantly increased healthcare utilization and expenditures. For patients with no HF with clinically significant TR, the annualized economic burden increased to 0.41 all-cause hospitalizations, 3.13 hospital days, and $29,985 in expenditures. For patients with HF and clinically significant TR, the annualized economic burden was even greater with 0.59 all-cause hospitalizations, 4.31 hospital days, and $42,255 in expenditures. Conclusion: The presence of clinically significant TR is associated with an increase in healthcare utilization and expenditures, irrespective of the presence of HF.
Coupling silica waveguides to photonic crystal waveguides through multilayered Luneburg lens
Creators: name: Badri, S. Hadi
name: Gilarlue, M. M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present a detailed analysis of a coupler based on the Luneburg lens to couple a silica waveguide to a photonic crystal waveguide. The dependence of coupling efficiency on the lens's truncation, cut position of the photonic crystal structure, coupler tip width, and misalignment are investigated with two-dimensional finite element method. We implement the lens with a concentric ring-based multilayer structure. We also present a method to replace layers with very narrow widths by layers of predetermined minimum widths in the structure of the lens. The coupling loss of the designed 2.7 $μm$-long coupler, connecting a 2.79 $μm$-wide silica waveguide to a photonic crystal structure with a rod-type square lattice, is lower than 0.49 dB in the C-band. The average coupling loss in the entire S, C, L, and U bands of optical communications is 0.70 dB.
The economic impact of clinically significant tricuspid regurgitation in a large, administrative claims database
Creators: name: Cork, David P.
name: McCullough, Peter A.
name: Hirsch S. Mehta
name: Barker, Colin M.
name: Houten, Joanna Van
name: Gunnarsson, Candace
name: Ryan, Michael
name: Baker, Erin
name: Mollenkopf, Sarah
name: Verta, Patrick
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: 60506 Virology
subject: FOS: Biological sciences
subject: Computational Biology

description: Aim: This study aims to quantify the healthcare burden of clinically significant tricuspid regurgitation (TR) in patients with and without heart failure (HF). Materials and Methods: Data were from the IBM® MarketScan® Research Databases from October 2011 to September 2016. Eligible patients met the following inclusion criteria: age ≥18 with a TR diagnosis, 12 months pre (baseline) and 6 months post (landmark) medical enrollment. The landmark period was used to categorize TR severity, defined as a record of pulmonary hypertension with ascites, lower extremity edema or hepatic insufficiency, or tricuspid valve surgery. Cohorts were defined based on TR etiology and severity: (1) no HF and no clinically significant TR; (2) HF with no clinically significant TR; (3) no HF with clinically significant TR; and (4) HF with clinically significant TR. Outcomes of interest were all-cause hospitalizations, hospital days, and expenditures. Multivariable models were fit for each of the annualized outcomes and adjusted for patient demographics, comorbidities, and other concomitant valve diseases. Results: There were 92,994 patients eligible for analysis. Patients with no HF and no clinically significant TR had the annualized healthcare burden of 0.20 all-cause hospitalizations (approximately 1 inpatient hospitalization every 5 years), 1.07 hospital days, and $17,478 in expenditures. The presence of clinically significant TR, alone or with HF, significantly increased healthcare utilization and expenditures. For patients with no HF with clinically significant TR, the annualized economic burden increased to 0.41 all-cause hospitalizations, 3.13 hospital days, and $29,985 in expenditures. For patients with HF and clinically significant TR, the annualized economic burden was even greater with 0.59 all-cause hospitalizations, 4.31 hospital days, and $42,255 in expenditures. Conclusion: The presence of clinically significant TR is associated with an increase in healthcare utilization and expenditures, irrespective of the presence of HF.
title: Effects of inflation on the distribution of income in Italy, 1953-1962
Creators: name: Spaventa, Luigi
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: inflation, growth, distribution
subject: P24, E25, B31

description: Article originally published in Banca Nazionale del Lavoro Quarterly Review, vol. 16 n. 67, December 1963, pp. 411-420. In the ten years 1953-62, the average price level in Italy rose every year, with the exception of 1959. The present article examines the effects of this inflationary process on income distribution. To do so the author first determines the extent to which each productive sector contributed to the creation of the total surplus of money product over real product, and how such excess was distributed amongst the various income categories in each sector. Then, the losses in real purchasing power these categories suffered are examined. Finally, the net outcome between gains in money product and losses for each category is found. According to the author, the data suggests peculiarly Ricardian features: the increase in prices was largely due to a rise in rents and of sectoral incomes in which are hidden some forms of rent, in the twofold aspect of privileged positions and inefficiency. JEL Codes: P24, E25, B31
description: PSL Quarterly Review, V. 66, N. 266 (2013)
Weak links and phase slip centers in superconducting MgB2 wires
Creators: name: Bar-Sadan, Maya
name: Leitus, Gregory
name: Reich, Shimon
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: MgB2 superconducting wires were produced by the Mg diffusion method. Scanning electron microscopy (SEM), optical microscopy, dispersive x-ray analysis (EDS) and XRD diffraction were used to study the physical structure and content of the wires. Magnetic properties (Tcm, Hc1, Hc2, Jc by the Bean model) were obtained with a SQUID magnetometer, and transport properties (Tcr, Hc2, resistivity and residual resistivity ratio) were measured using a standard four-lead configuration. The V-I characteristics of the wires close to the critical temperature showed a staircase response, which was attributed to the presence of weak links, creating phase slip centers. The origin of those weak links is discussed in relation to their formation and structure.
description: 7 pages, 7 figures, accepted to Journal of Superconductivity
Crack patterns in drying protein solution drops
Creators: name: Annarelli, Celine
name: Fornazero, Jean
name: Bert, Jacques
name: Colombani, Jean
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A deposited drop of bovine serum albumin salt solution experiences both gelation and fracturation during evaporation. The cracks appearing at the edge of the gelling drop are regularly spaced, due to the competition between the evaporation-induced and relaxation-induced stress evolution. Subsequently, the mean crack spacing evolves in an unexpected way, being inversely proportional instead of proportional to the deposit thickness. This evolution has been ascribed to the change with time of the average shrinkage stress, the crack patterning being purely elastic instead of evaporation-controlled.
Quantum Computational Complexity in the Presence of Closed Timelike Curves
Creators: name: Bacon, Dave
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Quantum computation with quantum data that can traverse closed timelike curves represents a new physical model of computation. We argue that a model of quantum computation in the presence of closed timelike curves can be formulated which represents a valid quantification of resources given the ability to construct compact regions of closed timelike curves. The notion of self-consistent evolution for quantum computers whose components follow closed timelike curves, as pointed out by Deutsch [Phys. Rev. D {\bf 44}, 3197 (1991)], implies that the evolution of the chronology respecting components which interact with the closed timelike curve components is nonlinear. We demonstrate that this nonlinearity can be used to efficiently solve computational problems which are generally thought to be intractable. In particular we demonstrate that a quantum computer which has access to closed timelike curve qubits can solve NP-complete problems with only a polynomial number of quantum gates.
description: 8 pages, 2 figures. Minor changes and typos fixed. Reference added
The Formation Height of Millimeter-wavelength Emission in the Solar Chromosphere
Creators: name: Martinez-Sykora, Juan
name: De Pontieu, Bart
name: Rodriguez, Jaime de la Cruz
name: Chintzoglou, Georgios
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the past few years, the ALMA radio telescope has become available for solar observations. ALMA diagnostics of the solar atmosphere are of high interest because of the theoretically expected linear relationship between the brightness temperature at mm wavelengths and the local gas temperature in the solar atmosphere. Key for the interpretation of solar ALMA observations is understanding where in the solar atmosphere the ALMA emission originates. Recent theoretical studies have suggested that ALMA bands at 1.2 (band 6) and 3 mm (band 3) form in the middle and upper chromosphere at significantly different heights. We study the formation of ALMA diagnostics using a 2.5D radiative MHD model that includes the effects of ion-neutral interactions (ambipolar diffusion) and non-equilibrium ionization of hydrogen and helium. Our results suggest that in active regions and network regions, observations at both wavelengths most often originate from similar heights in the upper chromosphere, contrary to previous results. Non-equilibrium ionization increases the opacity in the chromosphere so that ALMA mostly observe spicules and fibrils along the canopy fields. We combine these modeling results with observations from IRIS, SDO and ALMA to suggest a new interpretation for the recently reported "dark chromospheric holes", regions of very low temperatures in the chromosphere.
description: 5 figures under review in ApJL
ConferencePaper.pdf
Creators: name: Navod Neranjan Thilakarathne
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences
subject: 80303 Computer System Security
subject: 80302 Computer System Architecture
subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Cloud computing is considered as the one of the most dominant paradigm in field of information technology which offers on demand cost effective services such as Software as a service (SAAS), Infrastructure as a service (IAAS) and Platform as a service (PAAS).Promising all these services as it is, this cloud computing paradigm still associates number of challenges such as data security, abuse of cloud services, malicious insider and cyber-attacks. Among all these security requirements of cloud computing access control is the one of the fundamental requirement in order to avoid unauthorized access to a system and organizational assets. Main purpose of this research is to review the existing methods of cloud access control models and their variants pros and cons and to identify further related research directions for developing an improved access control model for public cloud data storage. We have presented detailed access control requirement analysis for cloud computing and have identified important gaps, which are not fulfilled by conventional access control models. As the outcome of the study we have come up with an improved access control model with hybrid cryptographic schema and hybrid cloud architecture and practical implementation of it. We have tested our model for security implications, performance, functionality and data integrity to prove the validity. We have used AES and RSA cryptographic algorithms to implement the cryptographic schema and used public and private cloud to enforce our access control security and reliability. By validating and testing we have proved that our model can withstand against most of the cyber-attacks in real cloud environment. Hence it has improved capabilities compared with other previous access control models that we have reviewed through literature.
title: Volatiles in the Moon: A sulfur and chlorine perspective
Creators: name: Faircloth, Samantha Jane
Publisher: name: The Open University
Year: 2020

description: Sulfur is a key volatile element in magmatic systems that exists in many phases (e.g. melt or gas), in multiple-oxidation states (S²⁻, S⁴⁺ and S⁶⁺), and has more than one stable isotope (e.g. ³²S and ³⁴S). Therefore, by measuring S, information regarding the conditions of a magma can be acquired. The aim of this work is to investigate what S can tell us about the behaviour of late-stage lunar basaltic magmas. An analytical protocol was developed to simultaneously measure S and Cl abundances and isotopes of lunar apatite in eleven lunar basalts with nano-scale secondary ion mass spectrometry (NanoSIMS). Additionally, a method was developed to measure the oxidation state of S in apatites of five mare basalts with X-ray absorption near-edge structure (XANES) spectroscopy at the S K-edge, making it possible to compare S oxidation state and S isotopes of lunar apatite for the first time. Lunar apatites contain ~20–2,800 ppm S, with δ³⁴S values between -33.3 ± 3.8‰ and +36.4 ± 3.2‰ (2σ). The Cl abundance is ~350–7,230 ppm, with δ³⁷Cl values of +6.5‰ ± 0.9‰ to +36.5‰ ± 1.1‰ (2σ). All of the apatites have S⁶⁺/ΣS(tot) ratios of >0, with average S⁶⁺/ΣS(tot) values between 0.05 and 0.55. An absence of correlation between S and Cl isotopes suggests a lack of evolutionary relationship between S and KREEP-rich components. The direction of S isotope fractionation, negative or positive, can be explained by degassing of H₂S and SO₂ from a relatively reduced (S²⁻) or oxidized (SO₄²⁻) late-stage silicate melt, respectively. The historical existence of relatively oxidized late-stage silicate melts is also evidenced by the presence of S⁶⁺ in lunar apatite. A positive trend is apparent between S⁶⁺/ΣS(tot) and δ³⁴S which is indicative of the dependence of S isotope fractionation on the oxygen fugacity of the late-stage silicate melt.
From multiplicative noise to directed percolation in wetting transitions
Creators: name: Ginelli, F.
name: Ahlers, V.
name: Livi, R.
name: Mukamel, D.
name: Pikovsky, A.
name: Politi, A.
name: Torcini, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A simple one-dimensional microscopic model of the depinning transition of an interface from an attractive hard wall is introduced and investigated. Upon varying a control parameter, the critical behaviour observed along the transition line changes from a directed-percolation to a multiplicative-noise type. Numerical simulations allow for a quantitative study of the multicritical point separating the two regions, Mean-field arguments and the mapping on a yet simpler model provide some further insight on the overall scenario.
description: 4 pages, 3 figures
title: The use of econometric models for long-term policies: A critical view
Creators: name: Spaventa, Luigi
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: econometrics, models, economic policy
subject: C52, C01, B31

description: Article originally published in Banca Nazionale del Lavoro Quarterly Review, vol. 19 n. 77, June 1966, pp. 99-120. The work provides a first appraisal of the contribution that econometric models can make to long-run economic policy. Rather than a detailed exposition or critique of the individual models, a more general analysis is provided. The author first outlines the econometric models considered, all of which provide a more or less accurate description of the state of the economic system in some future moment of time. In order to appraise the reliability of the information provided by the models their main relationships are examined from the point of view of their simultaneous working in the context of the whole model. Finally, the author examines what utility the more or less reliable information provided by formal models purporting to represent the hypothetical or desired situation of the economy at a certain date can have for economic policy decisions. The author concludes that there is no available econometric model from which reliable and useful information can be obtained for planning and for economic policy. Moreover, no reliable and useful indication is ever likely to be obtained from so-called consistency models. JEL Codes: C52, C01, B31
description: PSL Quarterly Review, V. 66, N. 266 (2013)
Local covariant quantum field theory over spectral geometries
Creators: name: Paschke, Mario
name: Verch, Rainer
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A framework which combines ideas from Connes' noncommutative geometry, or spectral geometry, with recent ideas on generally covariant quantum field theory, is proposed in the present work. A certain type of spectral geometries modelling (possibly noncommutative) globally hyperbolic spacetimes is introduced in terms of so-called globally hyperbolic spectral triples. The concept is further generalized to a category of globally hyperbolic spectral geometries whose morphisms describe the generalization of isometric embeddings. Then a local generally covariant quantum field theory is introduced as a covariant functor between such a category of globally hyperbolic spectral geometries and the category of involutive algebras (or *-algebras). Thus, a local covariant quantum field theory over spectral geometries assigns quantum fields not just to a single noncommutative geometry (or noncommutative spacetime), but simultaneously to ``all'' spectral geometries, while respecting the covariance principle demanding that quantum field theories over isomorphic spectral geometries should also be isomorphic. It is suggested that in a quantum theory of gravity a particular class of globally hyperbolic spectral geometries is selected through a dynamical coupling of geometry and matter compatible with the covariance principle.
description: 21 pages, 2 figures
ARALAS AZIQLIQ JEMLERDIŃ TEXNOLOGIYALIQ ÓZGESHELIKLERIN ÚYRENIW
Creators: name: Mamutov, Yusup
name: Yusupov, Beknazar
Publisher: name: Zenodo
Year: 2024

description: Bul maqalada tiykarınan aralas azıqlıq jemlerdiń  texnologiyalıq qásiyetlerin úyrenedi. Sonday aq, onıń xojalıq haywanlar ónimleriniń islep shıǵarıw procesin optimallastırıw jáne onıń sapalı ónimdi támiyinlewde zárúrli wazıypa ekenligi kòrsetiledi. Sonıń menen birge,  aralas azıqlıq jemlerdıń texnologiyalıq qásiyetleriniń tiykarǵı kórsetkishleri, olardıń fiziko-ximiyalıq hám reologik ózgeshelikleri, strukturalardıń, granulatsiyalawdıń quramı hám strukturasınıń tásirin kórsetedi. Úyreniw nátiyjeleri jańa texnologiyalıq processlerdi islep shıǵıw hám aralas azıqlıq jemlerdıń sapasın jaqsılaw ushın qollanılıwı múmkin.
title: Unravelling the Role of Ascorbic Acid and ER Stress in SEPN1-Related Myopathy
Creators: name: Pozzer, Diego
Publisher: name: The Open University
Year: 2020

description: Selenoprotein N1 (SEPN1) is a member of the selenocysteine-containing protein family, that is localised in the endoplasmic reticulum (ER) and ubiquitously expressed throughout the body. Mutations in the human SEPN1 gene were identified as the genetic cause of a muscle disease referred as SEPN1-related myopathy (SEPN1-RM), in which the main clinical features are axial weakness, scoliosis, a variable degree of spinal rigidity, respiratory failure and insulin resistance. The selective muscle phenotype of the human SEPN1 loss of function, the redox nature of SEPN1, and the fact that SEPN1-depleted cells show oxidative stress support the idea that SEPN1 may be involved in protecting muscle ER redox homeostasis. Ascorbic acid is an important antioxidant that is localized in the cytoplasm and in the endoplasmic reticulum lumen, since it is a cofactor needed in the folding of pro-collagen. Malnutrition characterized by low intake of ascorbic acid affects skeletal muscles, in terms of fatigue and myalgia. Thus, both ascorbic acid and SEPN1 deficiency bring to the development of a myopathic condition, which can be explained by the fact that the two molecules have overlapping functions and intracellular localization. To test the hypothesis that the anti-oxidant vitamin ascorbic acid protects SEPN1 knock out (KO) muscles from the consequences of SEPN1 loss of function we developed a mouse model mutant of SEPN1, which is also dependent on exogenous ascorbic acid. Our findings showed that a limited intake of ascorbic acid triggers ER stress and exacerbates SEPN1-related myopathic phenotype suggesting a protective role of the ascorbic acid in SEPN1 KO muscle. We also found that the highly active diaphragm muscle shows impaired force production and ER stress in SEPN1 KO mice and that the ablation of the ER stress mediator C/EBP homologous protein (CHOP) prevents diaphragm dysfunction and attenuates ER stress in SEPN1 KO mice. Lipotoxicity, meaning an overload of fatty acids, is among the conditions able to trigger ER stress. By feeding SEPN1 KO mice with a high-fat diet, we observed that the myopathic phenotype is not only restricted to the diaphragm, but also to the hind limb muscles of SEPN1 KO mice. These mice developed myopathic features that were characterised by the insurgence of ER stress. These findings suggest that ER stress is a novel pathogenic mechanism underlying SEPN1-RM and therefore reveal a therapeutic target for this disease, for which no treatment is currently available.
An interferometric method for determining the losses of spatially multi-mode nonlinear waveguides based on second harmonic generation
Creators: name: Santandrea, Matteo
name: Stefszky, Michael
name: Roeland, Ganaël
name: Silberhorn, Christine
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The characterisation of loss in optical waveguides is essential in understanding the performance of these devices and their limitations. Whilst interferometric-based methods generally provide the best results for low-loss waveguides, they are almost exclusively used to provide characterization in cases where the waveguide is spatially single-mode. Here, we introduce a Fabry-Pérot-based scheme to estimate the losses of a nonlinear (birefringent or quasi-phase matched) waveguide at a wavelength where it is multi-mode. The method involves measuring the generated second harmonic power as the pump wavelength is scanned over the phasematching region. Furthermore, it is shown that this method allows one to infer the losses of different second harmonic spatial modes by scanning the pump field over the separated phase matching spectra. By fitting the measured phasematching spectra from a titanium indiffused lithium niobate waveguide sample to the model presented in this paper, it is shown that one can estimate the second harmonic losses of a single spatial-mode, at wavelengths where the waveguides are spatially multi-mode.
description: 14 pages, 6 figures
Configuración de un Entorno Virtual para la Centralización de datos en Sistemas de Información Geográfica (SIG)
Creators: name: Gallart, Montserrat Ortega
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences
subject: Computer Engineering
subject: Applied Computer Science

description: Los Sistemas de Información Geográfica (SIG) son herramientas de información y gestión que permiten trabajar con datos geográficamente referenciados, tales como coordenadas geográficas. El objetivo de un SIG, es el tratamiento de información espacial que normalmente se almacena en una base de datos con extensiones que soporten información geográfica.
Uno de los sistemas de gestión de base de datos relacional empleado en los SIG, es PostgreSQL, distribuido bajo licencia PostgreSQL License (software libre). Junto con la extensión PostGIS, permite trabajar con objetos geográficos, índices espaciales y funciones geográficas y geoespaciales específicas, que operan sobre dichos datos.
Como base de trabajo para el Sistema de Información Geográfica, se empleará una máquina virtual, es decir, un programa que permita emular un ordenador con un sistema operativo determinado, ejecutando los programas necesarios en un entorno virtual, y centralizando la estructura de datos en un único equipo, sin necesidad de alterar su configuración actual.
Optical-fiber based measurement of an ultra-small volume high-Q photonic crystal microcavity
Creators: name: Srinivasan, Kartik
name: Barclay, Paul E.
name: Borselli, Matthew
name: Painter, Oskar
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A two-dimensional photonic crystal semiconductor microcavity with a quality factor Q ~ 40,000 and a modal volume Veff ~ 0.9 cubic wavelengths is demonstrated. A micron-scale optical fiber taper is used as a means to probe both the spectral and spatial properties of the cavity modes, allowing not only measurement of modal loss, but also the ability to ascertain the in-plane localization of the cavity modes. This simultaneous demonstration of high-Q and ultra-small Veff in an optical microcavity is of potential interest in quantum optics, nonlinear optics, and optoelectronics. In particular, the measured Q and Veff values could enable strong coupling to both atomic and quantum dot systems in cavity quantum electrodynamics.
description: 4 pages, 4 figures
V2_DU_LettreS
Creators: name: Basnage de Beauval, Henri
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Ceci est la V2 du Dictionnaire universel, revu et corrigé en 1701 par Basnage de Beauval. Cette version a été obtenue avec GROBID dictionaries, après adaptation du système et renentraînement en juillet 2020.
title: Executive Function Characteristics of Younger Adolescents Identified with Special Educational Needs
Creators: name: Kearvell-White, Jennifer
Publisher: name: The Open University
Year: 2020

description: Executive functioning (EF) was investigated in 134 young adolescents with Special Educational Needs (SEN) in comparison to 141 students not requiring additional support (Non-SEN peers). These students (11-14 years) completed standardized assessments of vocabulary, decoding and non-verbal reasoning, and verbal and non-verbal EF assessments of inhibition, executive working memory, switching and fluency. Significant group differences were found in all these measures (verbal switching excepted), but no significant differences were found between three SEN subgroups (school action, school action plus, and those with statements) apart from non-verbal inhibition. Cluster analyses suggested that despite significant group differences, both SEN and Non-SEN students were often included in the same clusters. Confirmatory factor analysis suggested that the best model of EF performance for the SEN group involved an immature organisation. Parents, teachers and students completed the BRIEF questionnaire for ‘inhibit’, ‘working memory’ and ‘shift’. All three groups provided significantly different ratings for the SEN and Non-SEN groups, although the ratings varied for each group. Teachers also completed the Strengths and Difficulties Questionnaire (SDQ) and analyses revealed significantly higher concerns for the SEN group. Binary logistic regressions were conducted to identify predictors of SEN status. Significant predictors from just the EF variables included inhibition, switching/shift and fluency. In the final analysis which included the three standardized assessments the significant predictors were decoding and the BRIEF ‘shift’ construct. The findings have increased the limited knowledge about the characteristics of young adolescent students with SEN. These students were identified as having significantly lower EF abilities than their Non-SEN peers; the structural organization of the EF abilities appears similar to younger individuals, and the most important predictors of their SEN status were decoding and shift. Task management and inflexibility (‘shift’) were important issues for coping with the demands of early secondary school life.
Scolytocis samoensis Blair 1928
Creators: name: Lopes-Andrade, Cristiano
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ciidae
Scolytocis
Scolytocis samoensis

description: Scolytocis samoensis Blair, 1928
Diagnosis and comments
 Scol. samoensis was described based on just one specimen, probably a female, deposited in BPBM (Hawaii, USA). Blair (1928) mentioned that the holotype is very defective. From the description provided by Blair (1928), Scol. samoensis may be distinguished from the other Scolytocis described here by the completely rounded humeri and the first abdominal ventrite longer than the next two ventrites together. In the other Scolytocis the first abdominal ventrite is as long as or shorter than the next two ventrites together, and the humeri is always angulate.
 As mentioned by Blair, the tarsi of Scol. samoensis appear to have three tarsomeres. The basal tarsomere of all Scolytocis examined in this study is extremely small and barely visible, even at high magnifications (over 100X under stereomicroscope). However, in slide preparations, I could evaluate that all species have four tarsomeres in each tarsus. The same is probably true for Scol. samoensis. A small discussion on the hypothetical presence of three tarsomeres (rather than four) in each tarsus of some ciid species is provided by Lopes-Andrade (2007a).
 Due to its shorter length, the seriate elytral punctation, and the antennal club that is almost twice as long as the funicle, Scol. samoensis may be tentatively included in the lawrencei species-group.
Distribution Known only from the type locality: Tutuila, Pago Pago, Samoa (Polynesia; Fig. 135).
description: Published as part of Lopes-Andrade, Cristiano, 2008, An essay on the tribe Xylographellini (Coleoptera: Tenebrionoidea: Ciidae), pp. 1-110 in Zootaxa 1832 (1) on page 36, DOI: 10.11646/zootaxa.1832.1.1, http://zenodo.org/record/5126979
Hyperbranched polyesters by polycondensation of fatty acid-based ABn-type monomers
Creators: name: Testud, Blandine
name: Pintori, Didier
name: Grau, Etienne
name: Taton, Daniel
name: Cramail, Henri
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Widely available vegetable oils were readily derivatized into chemically pure ABn-type monomers (n = 2 or 3). Their polymerization led to unprecedented hyperbranched polyesters. Four different AB2/AB3-type monomers bearing one A-type methyl ester and two or three B-type alcohol functions were purposely synthesized via two elementary steps, i.e. epoxidation of the internal double bond of the vegetable oil precursors followed by ring-opening of the epoxy groups under acidic conditions. The polycondensation of these bio-sourced monomers was performed in bulk, in the presence of an appropriate catalyst, giving access to modular hyperbranched polyesters with tunable properties. Among the catalysts tested, zinc acetate, 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and sodium methoxide proved the most effective, allowing the achievement of molar masses in the range 3000--10 000 g mol--1 and dispersities varying from 2 to 15, depending on the initial conditions. The degree of branching, DB, as determined by 1H NMR spectroscopy, was found to be between 0.07 and 0.45. The as-devised hyperbranched polyesters displayed either amorphous or semi-crystalline properties, as a function of the selected AB2/AB3-type initial monomers, with a glass transition temperature, Tg, ranging from --33 to 9 {\textdegree}C and a decomposition temperature at 5 wt% of the sample, Td5%, varying from 204 to 340 {\textdegree}C.
description: http://lcpo.fr/index.php/research-teams/2-biopolymers-and-bio-sourced-polymers, http://lcpo.fr/index.php/research-teams/1-polymerization-catalyses-and-engineering
El teorema de los cuatro colores: un problema topológico demostrado con ayuda de un ordenador
Creators: name: Stadler, Marta Macho
Publisher: name: figshare
Year: 2020
Subjects: subject: 10199 Pure Mathematics not elsewhere classified
subject: FOS: Mathematics
subject: 19999 Mathematical Sciences not elsewhere classified

description: El teorema de los cuatro colores se enuncia de la siguiente manera:

Para colorear cualquier mapa geopolítico plano de tal manera que dos países con frontera común sean de distinto color, basta con cuatro colores.
Generating hot carriers in plasmonic nanoparticles: when quantization does and does not matter?
Creators: name: Khurgin, Jacob B
name: Levy, Uriel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Plasmon-assisted hot carrier processes in metal nanoparticles can be described either classically or using the full strength of quantum mechanics. We reconfirm that from the practical applications point of view, when it comes to description of the decay of plasmons in nanoparticles, classical description is sufficiently adequate for all but the smallest of the nanoparticles. At the same time, the electron temperature rise in nanoparticles is discrete (quantized) and neglecting this fact can lead to significant underestimating of hot carrier assisted effects, such as photo-catalysis.
title: The growth of public debt in Italy: past experience, perspectives and policy problems
Creators: name: Spaventa, Luigi
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: public debt, sovereign debt, fiscal policy, debt management
subject: H63, F34, B31

description: Article originally published in Banca Nazionale del Lavoro Quarterly Review, vol. 37 n. 149, June 1984, pp. 119-149. The work surveys the Italian experience with reference to growth and public debt. It does not seek to test conflicting views, as the effects of some financial and policy innovations are too recent and some data is of poor quality. Rather, its more limited scope is to draw on past experience and, more importantly, assess future prospects in order to discuss some problems regarding both fiscal and monetary policy. The author examines debt formation with reference to borrowing requirements, their composition and their adjusted measure, before taking into consideration financing policies pursued by the authorities and the changes in the composition, ownership and cost of debt. Finally, possible future developments and some connected policy problems are examined. JEL Codes: H63, F34, B31
description: PSL Quarterly Review, V. 66, N. 266 (2013)
Silver particles with rhombicuboctahedral shape and effectively isotropic interactions with light
Creators: name: Steiner, Anja Maria
name: Mayer, Martin
name: Schletz, Daniel
name: Wolf, Daniel
name: Formanek, Petr
name: Hübner, René
name: Dulle, Martin
name: Förster, Stephan
name: König, Tobias A. F.
name: Fery, Andreas
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Truly spherical silver nanoparticles are of great importance for fundamental studies including plasmonic applications, but the direct synthesis in aqueous media is not feasible. Using the commonly employed copper-based etching processes, isotropicplasmonic response can be achieved by etching well-defined silver nanocubes. Whilst spherical like shape is typically prevailing in such processes, we established that there is a preferential growth towards silver rhombicuboctahedra (AgRCOs), which is thethermodynamically most stable product of this synthesis. The rhombicuboctahedral morphology is further evidenced by comprehensive characterization with small-angle X-ray scattering in combination with TEM tomographyand high resolution TEM. Wealso elucidate the complete reaction mechanism based on UV-Vis kinetic studies, and the postulated mechanism can also be extended to all copper-based etching processes.
Profile-based Resource Allocation for Virtualized Network Functions
Creators: name: Van Rossem, Steven
name: Tavernier, Wouter
name: Colle, Didier
name: Pickavet, Mario
name: Demeester, Piet
Publisher: name: arXiv
Year: 2019
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Machine Learning (cs.LG)
subject: Performance (cs.PF)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The virtualization of compute and network resources enables an unseen flexibility for deploying network services. A wide spectrum of emerging technologies allows an ever-growing range of orchestration possibilities in cloud-based environments. But in this context it remains challenging to rhyme dynamic cloud configurations with deterministic performance. The service operator must somehow map the performance specification in the Service Level Agreement (SLA) to an adequate resource allocation in the virtualized infrastructure. We propose the use of a VNF profile to alleviate this process. This is illustrated by profiling the performance of four example network functions (a virtual router, switch, firewall and cache server) under varying workloads and resource configurations. We then compare several methods to derive a model from the profiled datasets. We select the most accurate method to further train a model which predicts the services' performance, in function of incoming workload and allocated resources. Our presented method can offer the service operator a recommended resource allocation for the targeted service, in function of the targeted performance and maximum workload specified in the SLA. This helps to deploy the softwarized service with an optimal amount of resources to meet the SLA requirements, thereby avoiding unnecessary scaling steps.
description: accepted in IEEE TNSM journal
Mantenimiento Preventivo y Correctivo de Ordenadores e Impresoras
Creators: name: Jiménez, Lorena Santamaría
Publisher: name: figshare
Year: 2020
Subjects: subject: 100699 Computer Hardware not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Mantenimiento preventivo:
Mantenimiento que se efectúa para garantizar el buen funcionamiento de un equipo, y prevenir futuras averías, realizándose una puesta a punto de los componentes más comunes.
Mantenimiento correctivo:
Mantenimiento que se realiza cuando se detecta el mal funcionamiento de la impresora, se verifica si la impresora tiene algún tipo de fallo, sea mecánico, estructural o de impresión y se realiza la reparación de la misma.
IJCSN.pdf
Creators: name: Navod Neranjan Thilakarathne
Publisher: name: figshare
Year: 2020
Subjects: subject: 80303 Computer System Security
subject: FOS: Computer and information sciences
subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: Computer Software

description: Cloud computing is considered as the one of the most dominant paradigm in the field of information technology which offers on demand cost effective services such as Software as a service (SAAS), Infrastructure as a service (IAAS) and Platform as a service (PAAS).Provisioning all these services as it is, this cloud computing associates with number of challenges such as data security, abuse of cloud services, malicious insider and cyber-attacks. Among all these security requirements of cloud, access control is the one of the prominent requirement in order to avoid unauthorized access to data stored in the cloud. Main objective of this research is to review the existing methods of cloud access control models and their variants pros and cons and to identify further related research directions for developing an improved access control model for cloud data storage. We have presented detailed access control requirement analysis for cloud computing and have identified important gaps, which are not fulfilled by conventional access control models. As the final outcome of the study we have come up with an improved access control model with hybrid cryptographic schema and hybrid cloud architecture and practical implementation of it. Finally we have tested our proposed model for security implications, performance, functionality and data integrity to prove the validity. We have used advanced encryption standard (AES) which is a private key algorithm and Rivest–Shamir– Adleman (RSA) public key algorithm to implement the cryptographic schema and used public and private cloud to enforce our access control security and reliability. By validating and testing we have proved that our model can withstand against most of the cyber-attacks in real cloud environment. Thus it has improved capabilities compared with other previous access control models that we have reviewed through the literature.
Nanoscale spectroscopic imaging of GaAs-AlGaAs quantum well tube nanowires: correlating luminescence with nanowire size and inner multishell structure
Creators: name: Prete, Paola
name: Wolf, Daniel
name: Marzo, Fabio
name: Lovergine, Nico
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The luminescence and inner structure of GaAs-AlGaAs quantum well tube (QWT) nanowires were studied using low-temperature cathodoluminescence (CL) spectroscopic imaging, in combination with scanning transmission electron microscopy (STEM) tomography, allowing for the first time a robust correlation between the luminescence properties of these nanowires and their size and inner 3D structure down to the nanoscale. Besides the core luminescence and minor defects-related contributions, each nanowire showed one or more QWT peaks associated with nanowire regions of different diameters. The values of the GaAs shell thickness corresponding to each QWT peak were then determined from the nanowire diameters by employing a multishell growth model upon validation against experimental data (core diameter and GaAs and AlGaAs shell thickness) obtained from the analysis of the 3D reconstructed STEM tomogram of a GaAs-AlGaAs QWT nanowire. We found that QWT peak energies as a function of thus-estimated (3-7 nm) GaAs shell thickness are 40-120 meV below the theoretical values of exciton recombination for uniform QWTs symmetrically wrapped around a central core. However, the analysis of the 3D tomogram further evidenced azimuthal asymmetries as well as (azimuthal and axial) random fluctuations of the GaAs shell thickness, suggesting that the red-shift of QWT emissions is prominently due to carrier localization. The CL mapping of QWT emission intensities along the nanowire axis allowed to directly image the nanoscale localization of the emission, supporting the above picture. Our findings contribute to a deeper understanding of the luminescence-structure relationship in QWT nanowires and will foster their applications as efficient nanolaser sources for future monolithic integration onto silicon.
Re-analysis of the nucleon space- and time-like electromagnetic form factors in a two-component model
Creators: name: Bijker, R.
name: Iachello, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recent experimental data on space-like and time-like form factors of the nucleon are analyzed in terms of a two-component model with a quark-like intrinsic three-quark structure and quark-antiquark pairs.
description: 9 pages, 5 figures, accepted for publication as a Brief Report in Physical Review C