cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experimental investigation of a kW scale absorption power cycle with LiBr solution
Creators: name: Vaclav Novotny
name: Spale, Jan
name: Pavlicko, Jan
name: Kolovratnik, Michal
Publisher: name: Technical University of Munich
Year: 2021
Subjects: absorption; absorption power cycle; Kalina cycle; experimental; LiBr

description: Absorption cycles have been proposed not only for cooling but also for power generation. Most common is then Kalina cycle utilizing water-ammonia mixture working fluid. Other working fluids theoretically may provide thermodynamic benefits, have only rarely been examined experimentally. This work reports on, to the authors’ knowledge, the world’s first absorption power cycle using salt solution (here aqueous solution of LiBr), known so far only from absorption cooling. The system with a design power output of around 300 W features solutions such as a nylon 3D printed turbine or measurement of temperature glide during phase change in the heat exchangers. This work is focused on an analysis of the experimental performance of the system. The measured turbine efficiency reached 25% with a potential for much higher values with better design. Over the range of explored conditions, if 65% expander performance was assumed, the maximal cycle efficiency could be around 4.5% and utilization efficiency 0.5%.
The Loop Group of E8 and Targets for Spacetime
Creators: name: Sati, Hisham
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The dimensional reduction of the E8 gauge theory in eleven dimensions leads to a loop bundle in ten dimensional type IA string theory. We show that the restriction to the Neveu-Schwarz sector leads naturally to a sigma model with target space E8 with the ten-dimensional spacetime as the source. The corresponding bundle has a structure group the group of based loops, whose classifying space we study. We explore some consequences of this proposal such as possible Lagrangians and existence of flat connections.
description: 17 pages, main section improved, change in title, reference and acknowledgement added
Top Program Construction and Reduction for polynomial time Meta-Interpretive Learning
Creators: name: Patsantzis, Stassa
name: Muggleton, Stephen H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Meta-Interpretive Learners, like most ILP systems, learn by searching for a correct hypothesis in the hypothesis space, the powerset of all constructible clauses. We show how this exponentially-growing search can be replaced by the construction of a Top program: the set of clauses in all correct hypotheses that is itself a correct hypothesis. We give an algorithm for Top program construction and show that it constructs a correct Top program in polynomial time and from a finite number of examples. We implement our algorithm in Prolog as the basis of a new MIL system, Louise, that constructs a Top program and then reduces it by removing redundant clauses. We compare Louise to the state-of-the-art search-based MIL system Metagol in experiments on grid world navigation, graph connectedness and grammar learning datasets and find that Louise improves on Metagol's predictive accuracy when the hypothesis space and the target theory are both large, or when the hypothesis space does not include a correct hypothesis because of "classification noise" in the form of mislabelled examples. When the hypothesis space or the target theory are small, Louise and Metagol perform equally well.
description: 25 pages, 3 figures, to be published in Machine Learning Journal Special Issue on Learning and Reasoning
A Higher Twist in String Theory
Creators: name: Sati, Hisham
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Considering the gauge field and its dual in heterotic string theory as a unified field, we show that the equations of motion at the rational level contain a twisted differential with a novel degree seven twist. This generalizes the usual degree three twist that lifts to twisted K-theory and raises the natural question of whether at the integral level the abelianized gauge fields belong to a generalized cohomology theory. Some remarks on possible such extension are given.
description: 11 pages, several improvements added in response to the referee's comments
Liopeltis tricolor
Creators: name: Figueroa, Alex
name: Low, Martyn E. Y.
name: Lim, Kelvin K. P.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Squamata
Colubridae
Liopeltis
Liopeltis tricolor

description: Liopeltis tricolor (Schlegel, 1837) — Native; Indeterminate.
Herpetodryas tricolor Schlegel, 1837: 151–152, 187, pl. 6, figs. 16–18. Syntypes (2): BMNH 1946.1.5.37 and 1863.12.4.127. Type locality: “à Java ”, Indonesia.
Tricoloured Ringneck (Figures 18H & 19A)
Singapore records.
Ablabes tricolor — Boulenger, 1896: 643.— Flower, 1896: 885 (Botanic Gardens).— Flower, 1899: 673.— Ridley, 1899: 208.— Boulenger, 1912: 151.— de Rooij, 1917: 138.
Gongylosoma tricolor —Sworder, 1923: 64.
Liopeltis tricolor — de Haas, 1950: 560.—K.K.P. Lim & L.M. Chou, 1990: 54.—K.K.P. Lim & F.L.K. Lim, 1992: 146.—L.M. Chou et al., 1994: 105.— David & Vogel, 1996: 94.— Cox et al., 1998: 56.—Chan-ard et al., 1999: 33.— Iskandar & Colijn, 2001: 65.—K.P. Lim & F.L.K. Lim, 2002: 147.—N. Baker & K.P. Lim, 2008: 54, 169.— Das, 2010: 281.—L.L. Grismer, 2011a: 202.—P.K.L. Ng et al., 2011: 273.—N. Baker & K.P. Lim, 2012: 169.— Das, 2012a: 44.—Wallach et al., 2014: 386.—Chan-ard et al., 2015: 175.— de Lang, 2017: 156.— Das, 2018: 54.— Leviton et al., 2018: 436.—Poyarkov et al., 2019b: 1649.— Charlton, 2020: 74.
Remarks. With the last known record from Singapore being from 1897, L. tricolor has not been detected in Singapore for over 124 years (Table 2). Liopeltis tricolor is known from Singapore from only five specimens. The first report of L. tricolor comes from Flower (1896) who referred to two specimens collected by Ridley at SBG deposited at NHMUK. However, Boulenger (1896) only reported one specimen at NHMUK. The other three specimens are preserved at LKCNHM. One was taken by Ridley from BTNR on 26 May 1894, another was obtained at SBG in 1897, and the third has no data (Fig. 18H).
Occurrence. Known from four specimens predating 1897 and one specimen with no date. Likely extirpated.
Singapore conservation status. Not Evaluated.
Conservation priority. If rediscovered, then the highest priority.
IUCN conservation status. Least Concern [2012].
LKCNHM & NHMUK Museum specimens. Singapore (no locality): BMNH 1895.1.8.8 (no date), BMNH 1896.6.26.541 (no date); ZRC.2.2844 (no date); Botanic Gardens: ZRC.2.2843 (1897); Bukit Timah Nature Reserve: ZRC.2.2842 (26-May-1894).
Additional Singapore museum specimens. No specimens.
Singapore localities. Bukit Timah Nature Reserve—Singapore Botanic Gardens.
Genus Lycodon H. Boie in F. Boie in Fitzinger, 1826 (3 species)
Lycodon Fitzinger, 1826: 29, 57 (type species: Coluber aulicus Linnaeus, 1758, by original designation; gender masculine).
description: Published as part of Figueroa, Alex, Low, Martyn E. Y. & Lim, Kelvin K. P., 2023, Singapore's herpetofauna: updated and annotated checklist, history, conservation, and distribution, pp. 1-378 in Zootaxa 5287 (1) on pages 163-164, DOI: 10.11646/zootaxa.5287.1.1, http://zenodo.org/record/7960319
Fluid-fluid demixing transitions in colloid--polyelectrolyte star mixtures
Creators: name: Konieczny, M.
name: Likos, C. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We derive effective interaction potentials between hard, spherical colloidal particles and star-branched polyelectrolytes of various functionalities and smaller size than the colloids. The effective interactions are based on a Derjaguin-like approximation, which is based on previously derived potentials acting between polyelectrolyte stars and planar walls. On the basis of these interactions we subsequently calculate the demixing binodals of the binary colloid--polyelectrolyte star mixture, employing standard tools from liquid-state theory. We find that the mixture is indeed unstable at moderately high overall concentrations. The system becomes more unstable with respect to demixing as the star functionality and the size ratio grow.
description: 24 pages, 9 figures, submitted to Journal of Physics: Condensed Matter
Explicit Cancellation of Triangles in One-loop Gravity Amplitudes
Creators: name: Bjerrum-Bohr, N. E. J.
name: Vanhove, Pierre
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyse one-loop graviton amplitudes in the field theory limit of a genus-one string theory computation. The considered amplitudes can be dimensionally reduced to lower dimensions preserving maximal supersymmetry. The particular case of the one-loop five-graviton amplitude is worked out in detail and explicitly features no triangle contributions. Based on a recursive form of the one-loop amplitude we investigate the contributions that will occur at n-point order in relation to the ``no-triangle'' hypothesis of N=8 supergravity. We argue that the origin of unexpected cancellations observed in gravity scattering amplitudes is linked to general coordinate invariance of the gravitational action and the summation over all orderings of external legs. Such cancellations are instrumental in the extraordinary good ultra-violet behaviour of N=8 supergravity amplitudes and will play a central role in improving the high-energy behaviour of gravity amplitudes at more than one loop.
description: 25 pages. 2 eps pictures, harvmac format. v2: version to appear in JHEP. Equations (3.9), (3.12) and minor typos corrected
Fatigue cracking of near-eutectoid steel in corrosive environments
Creators: name: Hassan, Khairy El-Hadi
Publisher: name: University of British Columbia
Year: 2009

description: The fatigue crack propagation behavior of near-eutectoid steel (AISI 1070) was investigated in both pearlitic and fully spheroidized microstructures. Experiments were conducted on single edge notched specimens. Constant amplitude sinusoidal loading was applied at high frequency (-97 Hz) with R ratio of 0.5. Testing conditions were primarily under plane strain and good mixing between the crack tip solution and bulk solution was maintained. Experiments were conducted at ambient temperature and surface crack growth was measured optically. Attention was directed towards the effects of environment, heat treatment and cathodic protection. Environments were: desiccated air, distilled water, 3.5% NaCl solution, and buffered 3.5% NaCl solution (pH=10.5). Experiments in the NaCl solutions were conducted with and without cathodic protection. The results indicate that crack propagation is slower in the fully spheroidized microstructure. Formation of corrosion products in the crack caused crack growth retardation. The minimum crack propagation rate was observed in the spheroidized microstructure in 3.5% NaCl solution cathodically polarized to -1.0 VSCE- Corrosion products induced a crack closure effect, and reduced the effective crack tip cyclic stress intensity factor (AKefj) to a lower level. Crack fractography was examined using scanning electron microscopy (SEM). Fatigue striations were not readily visible in stage-II fatigue crack propagation. The overload region (stage-Ill) showed crystallographic cleavage-like facets and river lines.
Scaling-up a biomass fired micro-CHP ORC for better performance towards commercialization
Creators: name: Mascuch, Jakub
name: Spale, Jan
name: Vaclav Vodicka
name: Zbynek Zeleny
name: Vaclav Novotny
Publisher: name: Technical University of Munich
Year: 2021
Subjects: ORC; CHP; biomass; microcogeneration; expander; rotary vane expander; economic evaluation

description: Microcogeneration utilizing Organic Rankine cycle technology is seen as a technology of vast potential, but commercialization attempts of many systems have shown how challenging it is to transform laboratory results into competitive products. Throughout the development, the authors’ collective focus on cogeneration from biomass, including very low grade one, for which organic Rankine cycle power systems appear as a suitable choice. In the past, at the Czech Technical University, the authors developed a 50 kWth 2 kWe unit that has undergone an on-site pilot installation. The economic parameters were however for many other applications prohibitive, especially with respect to the new legal requirements for biomass combustion. Therefore, in order to improve the economic performance, the system has been scaled up to 120 kWth and 6.2 kWe. This manuscript discusses the process of scaling up, designing, assembling and operating the upscaled combined heat and power unit. It includes modifications of previously applied technologies, especially regarding the boiler, an in house designed rotary vane expander and the overall system configuration. Furthermore, the authors present a comparison of the operational parameters of the new 6.2 kWe unit with the previous smaller 2 kWe unit, as well as a comparison of the implemented rotary vane expanders as a specific feature of the design. The comparison is performed on several thousand hours of experimental data for both units. From the total net combined heat and power production efficiency standpoint, the larger unit exceeds the former one by five percentage points, reaching 89%, even though the expander performance is slightly poorer with a nominal isentropic efficiency of 56%. However, the economic performance of the upscaled unit excels in comparison with the smaller one. Economic evaluation with a reference 120 kW biomass boiler concludes that an increase of the capital cost of the boiler by one third justifies the investment into the ORC CHP module
Signatures of a spin-1/2 cooperative paramagnet in the diluted triangular lattice of Y$_2$CuTiO$_6$
Creators: name: Kundu, S.
name: Hossain, Akmal
name: S, Pranava Keerthi
name: Das, Ranjan
name: Baenitz, M.
name: Baker, Peter J.
name: Orain, Jean-Christophe
name: Joshi, D. C.
name: Mathieu, Roland
name: Mahadevan, Priya
name: Pujari, Sumiran
name: Bhattacharjee, Subhro
name: Mahajan, A. V.
name: Sarma, D. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a combination of thermodynamic and dynamic experimental signatures of a disorder driven dynamic cooperative paramagnet in a 50% site diluted triangular lattice spin-1/2 system, Y$_2$CuTiO$_6$. Magnetic ordering and spin freezing are absent down to 50 mK, far below the Curie Weiss scale of ~-134 K. We observe scaling collapses of the magnetic field- and temperature-dependent magnetic heat capacity and magnetisation data, respectively, in conformity with expectations from the random singlet physics. Our experiments establish the suppression of any freezing scale, if at all present, by more than three orders of magnitude, opening a plethora of interesting possibilities such as disorder-stabilized long range quantum entangled ground states.
description: 18 pages, 9 figures, published in Physical Review Letters
The role of afterglow break-times as GRB jet angle indicators
Creators: name: Nava, L.
name: Ghisellini, G.
name: Ghirlanda, G.
name: Cabrera, J. I.
name: Firmani, C.
name: Avila-Reese, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The early X-ray light curve of Gamma Ray Bursts (GRBs) is complex, and shows a typical steep-flat-steep behaviour. The time T_a at which the flat (plateau) part ends may bear some important physical information, especially if it plays the same role of the so called jet break time t_jet. To this aim, stimulated by the recent analysis of Willingale et al., we have assembled a sample of GRBs of known redshifts, spectral parameters of the prompt emission, and T_a. By using T_a as a jet angle indicator, and then estimating the collimation corrected prompt energetics, we find a correlation between the latter quantity and the peak energy of the prompt emission. However, this correlation has a large dispersion, similar to the dispersion of the Amati correlation and it is not parallel to the Ghirlanda correlation. Furthermore, we show that the correlation itself results mainly from the dependence of the jet opening angle on the isotropic prompt energy, with the time T_a playing no role, contrary to what we find for the jet break time t_jet. We also find that for the bursts in our sample T_a weakly correlates with E_iso of the prompt emission, but that this correlation disappears when considering all bursts of known redshift and T_a. There is no correlation between T_a and the isotropic energy of the plateau phase.
description: 10 pages, 8 figures, 2 tables. Title changed. Accepted for publication in MNRAS
A More Fundamental Plane
Creators: name: Bolton, Adam S.
name: Burles, Scott
name: Treu, Tommaso
name: Koopmans, Leon V. E.
name: Moustakas, Leonidas A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We combine strong-lensing masses with SDSS stellar velocity dispersions and HST-ACS effective (half-light) radii for 36 lens galaxies from the Sloan Lens ACS (SLACS) Survey to study the mass dependence of mass-dynamical structure in early-type galaxies. We find that over a 180--390 km/s range in velocity dispersion, structure is independent of lensing mass to within 5%. This result suggests a systematic variation in the total (i.e., luminous plus dark matter) mass-to-light ratio as the origin of the tilt of the fundamental plane (FP) scaling relationship between galaxy size, velocity dispersion, and surface brightness. We construct the FP of the lens sample, which we find to be consistent with the FP of the parent SDSS early-type galaxy population, and present the first observational correlation between mass-to-light ratio and residuals about the FP. Finally, we re-formulate the FP in terms of surface mass density rather than surface brightness. By removing the complexities of stellar-population effects, this mass-plane formulation will facilitate comparison to numerical simulations and possible use as a cosmological distance indicator.
description: 4+epsilon pages, 1 figure, emulateapj. Revised version accepted for publication in the ApJ Letters
Micro-Moments Analysis Timeseries Algorithm - U.S. Patent Number 10,528,959
Creators: name: Fadli, Samih
Publisher: name: figshare
Year: 2021
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences
subject: 80199 Artificial Intelligence and Image Processing not elsewhere classified
subject: 170203 Knowledge Representation and Machine Learning
subject: FOS: Psychology
subject: 80109 Pattern Recognition and Data Mining

description: The Micro-Moment Analysis Algorithms are artificial neural networks analysis models that determine accurately in real-time across the omni-channel customer journey the exact moments, channel and content to engage people with cognitive experiences curated programmatically with a prescriptive engagement. The MMV indicates accurately the optimal time for a customer to receive a targeted ads. The MMV is empowering the CORE of the Publicis COSMOS Identity Marketing Data Platform currently managing over 3.6 petabytes of PII/NON PII data on behalf of our customers across North America and EMEA.

This patent was awarded to Samih Fadli. U.S. patent number 10,528,959 [Application Number 16/457,285] was granted by the patent office on 2020-01-07 for micro-moment analysisand a continuation of U.S. application Ser. No. 16/424,179, filed May 28, 2019 entitled “Micro-Moment Analysis”, which is a continuation-in-part of U.S. application Ser. No. 15/269,786, filed Sep. 19, 2016 entitled “Micro-Moment Analysis” and U.S. application Ser. No. 15/269,642, filed Sep. 19, 2016 entitled “Universal Identification” which applications claim priority from U.S. Provisional Application No. 62/220,727, filed Sep. 18, 2015, and to U.S. Provisional Application No. 62/288,763, filed Jan. 29, 2016. The disclosures of the applications referenced above are incorporated by reference herein in their entirety.
Higher-order tail contributions to the energy and angular momentum fluxes in a two-body scattering process
Creators: name: Bini, Donato
name: Geralico, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The need for more and more accurate gravitational wave templates requires taking into account all possible contributions to the emission of gravitational radiation from a binary system. Therefore, working within a multipolar-post-Minkowskian framework to describe the gravitational wave field in terms of the source multipole moments, the dominant instantaneous effects should be supplemented by hereditary contributions arising from nonlinear interactions between the multipoles. The latter effects are referred to as tails being described in terms of integrals depending on the past history of the source. We compute higher-order tail (i.e., tail-of-tail and tail-squared) contributions to both energy and angular momentum fluxes and their averaged values along hyperboliclike orbits at the leading post-Newtonian approximation, using harmonic coordinates and working in the Fourier domain. Due to the increasing level of accuracy recently achieved in the determination of the scattering angle in a two-body system by several complementary approaches, the knowledge of these terms will provide useful information to compare results from different formalisms.
description: 14 pages, 1 figure (2 eps files), revtex macros used; v2: Eq. (4.14) corrected
Regularity and energy transfer for a nonlinear beam equation
Creators: name: Coclite, Giuseppe Maria
name: Fanizza, Giuseppe
name: Maddalena, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35L76, 35B30, 35B65, 35D30, 35L20, 74B20

description: In this paper we study some key effects of a discontinuous forcing term in a fourth order wave equation on a bounded domain, modeling the adhesion of an elastic beam with a substrate through an elastic-breakable interaction. By using a spectral decomposition method we show that the main effects induced by the nonlinearity at the transition from attached to detached states can be traced in a loss of regularity of the solution and in a migration of the total energy through the scales.
description: 6 pages
Additional file 1 of Neutrophil to lymphocyte ratio as an assessment tool to differentiate between uterine sarcoma and myoma: a systematic review and meta-analysis
Creators: name: Tabatabaei, Fatemeh
name: Babadi, Saghar
name: Nourigheimasi, Shima
name: Ghaedi, Arshin
name: Khanzadeh, Monireh
name: Bazrgar, Aida
name: Gargari, Morad Kohandel
name: Khanzadeh, Shokoufeh
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Additional file 1: Table S1. The results of sensitivity analysis.
Combined thermodynamic and turbine design analysis of transcritical CO2 cycle for waste heat recovery
Creators: name: Uusitalo, Antti
name: Turunen-Saaresti, Teemu
Publisher: name: Technical University of Munich
Year: 2021

description: The utilization of low temperature waste heat has been under great interest in the recent times. One opportunity to utilize low-temperature waste heat sources is to convert the heat into electricity. For this purpose, organic Rankine cycles have been often considered. Another power system capable for converting low temperature heat to electricity is the transcritical CO2 power cycle. In this study, the utilization of exhaust gas heat at the temperature of 364 oC and the utilization of high temperature water at the temperature of 90 oC are investigated with transcritical CO2 cycles. The investigated waste heat temperature levels and the cycle cooling temperatures were selected based on typical values found in cruise ships using large-scale four stroke gas engines as their main power source. The transcritical CO2 cycle analysis and the design of radial inflow turbine for the cycle were combined, in order to investigate the cycle and turbine efficiency under different design power scales and conditions. The turbine geometry was designed based on the cycle operating conditions and mass flowrate, and the turbine efficiency was evaluated for each design case by using existing loss correlations for radial turbines. The investigated turbine losses are including stator loss, passage loss, tip clearance loss, disk friction loss and exit kinetic loss. Based on the results, heat can be utilized by the CO2 cycle and high efficiency radial turbines can be designed for the investigated transcritical CO2 cycles recovering waste heat. In addition, the use of CO2 as the working fluid would allow to have more compact systems, when compared to the use of ORC systems adopting high molecular weight fluids. The main drawbacks of using transcritical CO2 cycles for waste heat recovery, when compared to the ORC systems, are the high pressure level and high rotational speed of the turbomachinery required in the system.
Composition Optimization of Zeotropic Mixtures for ORC Systems Considering Constraints
Creators: name: Bederna, Benedikt Gregor
name: Barta, Riley Bradley
name: Hesse, Ullrich
Publisher: name: Technical University of Munich
Year: 2021

description: Organic Rankine Cycle (ORC) processes are used to convert low-temperature waste heat into electricity. Often, these sources and sinks are sensible heat flows. In such a case, it may be appropriate to adapt the cycle process to these external temperature characteristics. This can be realized with zeotropic mixtures as a working fluid and evaluated by an exergy calculation and the exergetic efficiency. In addition to the usual degrees of freedom for the optimization of conventional ORC processes, the composition of the mixture is therein also a varying parameter. This depends on the predefined parameters of the source and sink, such as the mass flows or outlet temperatures of the system, as well as the outlet power or auxiliary power consumption of the components. Particularly in small-scale systems, the economic aspects play an overriding role so that constraints such as the minimal power density or maximum volume flow rates of volumetric expanders should be included in the optimization process. For this purpose, a two-stage optimization tool is presented which determines the optimal composition for up to quaternary mixtures and takes constraints of the source, the sink, and components used into account. In a time-saving analytical pre-calculation, the process can already be optimized and parametric studies or initial value variations can easily be carried out. The results serve as input parameters for a numerical post-calculation, which models the cycle in detail and performs further optimization. The functionality of this tool is illustrated by means of an ORC system with an air-cooled condenser at a sensible waste heat source temperature of 90 to 120 °C and initial results and observations are presented. Two mixtures with the respective preselected components R-1234ze(E), R-1224yd(Z), R-1233zd(E) and R-1336mzz(Z) as well as R-290, R-600a, R-600 and R-601 are used for this purpose. It was proven that higher exergetic efficiencies and net power can be achieved through application of zeotropic mixtures, but the component limitations, such as condenser geometry and pressure losses, have serious influences on the optimal composition and concentration of the mixtures.
Micro-Moments Analysis Timeseries Graph (ATG) and Recurrent Neural Network (RNN) - U.S. Patent Number 10,528,959
Creators: name: Fadli, Samih
Publisher: name: figshare
Year: 2021
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences
subject: 80199 Artificial Intelligence and Image Processing not elsewhere classified

description: The Micro-Moment Analysis Algorithms are artificial neural networks analysis models that determine accurately in real-time across the omni-channel customer journey the exact moments, channel and content to engage people with cognitive experiences curated programmatically with a prescriptive engagement. The MMV indicates accurately the optimal time for a customer to receive a targeted ads. The MMV is empowering the CORE of the Publicis COSMOS Identity Marketing Data Platform currently managing over 3.6 petabytes of PII/NON PII data on behalf of our customers across North America and EMEA.

This patent was awarded to Samih Fadli. U.S. patent number 10,528,959 [Application Number 16/457,285] was granted by the patent office on 2020-01-07 for micro-moment analysisand a continuation of U.S. application Ser. No. 16/424,179, filed May 28, 2019 entitled “Micro-Moment Analysis”, which is a continuation-in-part of U.S. application Ser. No. 15/269,786, filed Sep. 19, 2016 entitled “Micro-Moment Analysis” and U.S. application Ser. No. 15/269,642, filed Sep. 19, 2016 entitled “Universal Identification” which applications claim priority from U.S. Provisional Application No. 62/220,727, filed Sep. 18, 2015, and to U.S. Provisional Application No. 62/288,763, filed Jan. 29, 2016. The disclosures of the applications referenced above are incorporated by reference herein in their entirety.
Ginzburg-Landau equation and vortex liquid phase of Fermi liquid superconductors
Creators: name: Ng, Tai-Kai
name: Tse, Wai-Tak
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper we study the Ginzburg-Landau (GL) equation for Fermi liquid superconductors with strong Landau interactions $F_0$ and $F_1$. We show that Landau interactions renormalize two parameters entering the GL equation leading to renormalization of superfluid density and separation of length and energy scales for amplitude and phase fluctuations. The separation of energy/length scales for amplitude and phase fluctuations in term leads to unconventional (2D) KT transition and vortex liquid phase. Application of the GL equation to describe underdoped high-$T_c$ cuprates is being discussed.
description: 8 pages, 1 figure
Quantization and soliton-like solutions for the $ΦΨ$-model in a optic fiber
Creators: name: Belgiorno, Francesco
name: Cacciatori, Sergio Luigi
name: Trevisan, Simone
name: Viganò, Adriano
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the framework of a mesoscopical model for dielectric media we provide an analytical description for the electromagnetic field confined in a cylindrical cavity containing a finite dielectric sample. This system is apted to simulate the electromagnetic field in a optic fiber, in which two different regions, a vacuum region and a dielectric one, appear. A complete description for the scattering basis is introduced, together with field quantization and the two-point function. Furthermore, we also determine soliton-like solutions in the dielectric, propagating in the sample of nonlinear dielectric medium.
description: 21 pages, 4 figures
Quantum Corrections to the Accretion onto a Schwarzschild Black Hole in the Background of Quintessence
Creators: name: Nozari, Kourosh
name: Hajebrahimi, Milad
name: Saghafi, Sara
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is well known that quantum effects may lead to remove the intrinsic singularity point of back holes. Also, the quintessence scalar field is a candidate model for describing late-time acceleration expansion. Accordingly, Kazakov and Solodukhin considered the existence of back-reaction of the spacetime due to the quantum fluctuations of the background metric to deform Schwarzschild black hole, which led to change the intrinsic singularity of the black hole to a 2-sphere with a radius of the order of the Planck length. Also, Kiselev rewrote the Schwarzschild metric by taking into account the quintessence field in the background. In this study, we consider the quantum-corrected Schwarzschild black hole inspired by Kazakov-Solodukhin's work, and Schwarzschild black hole surrounded by quintessence deduced by Kiselev to study the mutual effects of quantum fluctuations and quintessence on the accretion onto the black hole. Consequently, the radial component of 4-velocity and the proper energy density of the accreting fluid have a finite value on the surface of its central 2-sphere due to the presence of quantum corrections. Also, by comparing the accretion parameters in different kinds of black holes, we infer that the presence of a point-like electric charge in the spacetime is somewhat similar to some quantum fluctuations in the background metric.
description: 27 pages, 4 figures
Spectroscopic evidences of quantum critical charge fluctuations in cuprates
Creators: name: Grilli, M.
name: Caprara, S.
name: Di Castro, C.
name: Suppa, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We calculate the optical conductivity in a clean system of quasiparticles coupled to charge-ordering collective modes. The absorption induced by these modes may produce an anomalous frequency and temperature dependence of low-energy optical absorption in some cuprates. However, the coupling with lattice degrees of freedom introduces a non-universal energy scale leading to scaling violation in low-temperature optical conductivity.
description: Proceedings of M2S 2006. To appear in Physica C
OMIP-079: Cell cycle of CD4+ and CD8+ naïve/memory T cell subsets, and of Treg cells from mouse spleen.
Creators: name: Natalini, Ambra
name: Simonetti, Sonia
name: Favaretto, Gabriele
name: Peruzzi, Giovanna
name: Antonangeli, Fabrizio
name: Santoni, Angela
name: Munoz-Ruiz, Miguel
name: Hayday, Adrian
name: Di Rosa, Francesca
Publisher: name: The Francis Crick Institute
Year: 2021
Subjects: subject: Model organisms
subject: Human Biology & Physiology
subject: Immunology
subject: FOS: Clinical medicine

description: A multicolor flow cytometry panel was designed and optimized to define the following nine mouse T cell subsets: Treg (CD3+ CD4+ CD8- FoxP3+ ), CD4+ T naïve (CD3+ CD4+ CD8- FoxP3- CD44int/low CD62L+ ), CD4+ T central memory (CD3+ CD4+ CD8- FoxP3- CD44high CD62L+ ), CD4+ T effector memory (CD3+ CD4+ CD8- FoxP3- CD44high CD62L- ), CD4+ T EMRA (CD3+ CD4+ CD8- FoxP3- CD44int/low CD62L- ), CD8+ T naïve (CD3+ CD8+ CD4- CD44int/low CD62L+ ), CD8+ T central memory (CD3+ CD8+ CD4- CD44high CD62L+ ), CD8+ T effector memory (CD3+ CD8+ CD4- CD44high CD62L- ), and CD8+ T EMRA (CD3+ CD8+ CD4- CD44int/low CD62L- ). In each T cell subset, a dual staining for Ki-67 expression and DNA content was employed to distinguish the following cell cycle phases: G0 (Ki67- , with 2n DNA), G1 (Ki67+ , with 2n DNA), and S-G2 /M (Ki67+ , with 2n
Subdivision schemes on a dyadic half-line
Creators: name: Karapetyants, Mikhail
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper subdivision schemes, which are used for functions approximation and curves generation, are considered. In classical case, for the functions defined on the real line, the theory of subdivision schemes is widely known due to multiple applications in constructive approximation theory, signal processing as well as for generating fractal curves and surfaces. Subdivision schemes on a dyadic half-line, which is a positive half-line, equipped with the standard Lebesgue measure and the digitwise binary addition operation, where the Walsh functions play the role of exponents, are defined and studied. Necessary and sufficient convergence conditions of the subdivision schemes in terms of spectral properties of matrices and in terms of the smoothness of the solution of the corresponding refinement equation are proved. The problem of the convergence of subdivision schemes with non-negative coefficients is also investigated. Explicit convergence criterion of the subdivision schemes with four coefficients is obtained. As an auxiliary result fractal curves on a dyadic half-line are defined and the formula of their smoothness is proved. The paper contains various illustrations and numerical results.
Aluminum-silicon carbide composite coatings by plasma spraying
Creators: name: Ghosh, Kunal
Publisher: name: University of British Columbia
Year: 2009

description: The use of aluminum in the automobile engines and other critical parts require a superior surface property of the same. This has led to the development of plasma sprayable surface coatings for the components. To impart the maximum bonding strength, along with hardness to the coatings an aluminum based composite (Al-SiC) was found to be the most suitable. The presence of a hard ceramic second phase within a soft metallic matrix greatly improves the wear resistance of the composite material. The powders for spraying were prepared by mechanical agglomeration of 6061 Al alloy (particle size between 40 and 60 um) with fine SiC particles ( « 8 um) by using high energy vibratory mills. The concentration of SiC was varied from 20-75 vol%, the balance being the matrix A l alloy. The size of the reinforcement was varied from 8 to 37 um in the Al-50vol%SiC composite coatings. A Process Control Agent (PCA) was used to modify the morphology of the powders during the process of mechanical alloying. Mechanical alloying produced composite powders in a size range between 40 and 120 u.m with the SiC phase uniformly dispersed within the matrix. The powders used for spraying were fractionated between the size range of 44 and 149 um by sieving. The powders were sprayed using two types of axial feed plasma torches. Coatings were sprayed on mild steel coupons, rods and thin foils of A l , Ni, plain carbon steel and stainless steel, which were used for conducting tests to assess the physical properties of the coatings. The cross sections of the coatings sprayed on the coupons were observed under an SEM and optical microscope. The hardness, porosity and SiC distribution of the coatings were assessed on these cross sections. The coatings were tested for different physical and mechanical properties like adhesion and wear strength. Adhesion was tested on the mild steel rods using the standard ASTM C633 pull tests but the results were mostly inconclusive. Adhesion strength on the foils was also measured by peel tests which is a modification of the ASTM D-3167 tests. The coatings showed high adhesion strength compared to the other commercially available coatings reported in a recent work [40]. Adhesion strength was found to decrease with the increase in the SiC content and decrease in SiC particle sizes. Erosive wear of the coatings was assessed using a dry erosion test which is a modification of the ASTM G76-83 test. The increase in the SiC content and decrease in the reinforcing particle size improved the wear resistance of the coatings. The abrasive wear resistance was found to improve with the increase in SiC particle size and also with the SiC content in the composite powders (or coatings).
Asymmetric Wolf-Rayet winds: implications for GRB afterglows
Creators: name: Eldridge, J. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent observations of Wolf-Rayet (WR) binaries WR151 and WR155 infer that their stellar winds are asymmetric. We show that such asymmetries can alter the stellar-wind bubble structure, bringing the wind-termination shock closer to the WR star. If the wind asymmetry is caused by rotation, the wind density and distance to the wind-termination shock are both decreased along the rotation axis by a factor of a few for the observed equator-to-pole wind density ratio of WR151. If this asymmetry lasts until core-collapse the time taken to reach the wind-termination shock by supernova ejecta or a gamma-ray burst jet is reduced. This leads to a distorted structure of the supernova ejecta and makes it more likely a constant density environment is inferred from gamma-ray burst afterglow observations.
description: 5 pages, 4 figures, version revised by referee's comments, resubmitted to MNRAS
Kinematic constraints beyond $z\simeq0$ using calibrated GRB correlations
Creators: name: Luongo, Orlando
name: Muccino, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The dynamics of the Universe are revised using high-redshift data from gamma-ray bursts to constrain cosmographic parameters by means of model-independent techniques. Considering samples from four gamma-ray burst correlations and two hierarchies up to $j_0$ and $s_0$, respectively, we derived limits over the expansion history of the Universe. Since cosmic data span outside $z\simeq0$, we investigated additional cosmographic methods such as auxiliary variables and Padé approximations. Beziér polynomials were employed to calibrate our correlations and heal the circularity problem. Several Markov chain Monte Carlo simulations were performed on the model-independently calibrated Amati, Ghirlanda, Yonetoku, and combo correlations to obtain $1$--$σ$ and $2$--$σ$ confidence levels and to test the standard cosmological model. Reasonable results are found up to $j_0$ and $s_0$ hierarchies, respectively, only partially alleviating the tension on local $H_0$ measurements as $j_0$ hierarchy is considered. Discussions on systematic errors have been extensively reported here. Our findings show that the $Λ$CDM model is not fully confirmed using gamma-ray bursts. Indications against a genuine cosmological constant are summarized and commented on in detail.
description: 15 pages, 7 figures, 7 tables
Pedagogias e Práticas de Aprendizagem Ativa (parte 1)
Creators: name: Oliveira, Murilo Alvarenga
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Active learning
subject: Entrepreneurship
subject: Education
subject: Management Education
subject: Experiential Learning

description:  

Conteúdo da disciplina Pedagogias e Práticas de Aprendizagem Ativa do MESTRADO PROFISSIONAL EM ADMINISTRAÇÃO, Universidade Federal Fluminense.

A disciplina é voltada a análise da integração dos métodos ativos na educação para o empreendedorismo (EE) e nos seus níveis de execução das instituições contemporâneas. Seus objetivos são:

a)    Descrever o movimento de educação para o empreendedorismo e como as instituições de ensino podem executar programas e projetos;b)    Compreender a integração entre os métodos ativos de aprendizagem e a educação para o empreendedorismo a partir da Teoria da Aprendizagem Vivencial; c)    Desenvolver modelos conceituais e diferentes artefatos educacionais pela abordagem da Design Science Research (DSR).

Os principais tópicos a serem desenvolvidos são: A EE - políticas e práticas pedagógicas, avaliação e efeitos de iniciativas, perspectivas teóricas e histórico da EE. Fundamentos da teoria da aprendizagem vivencial, processo e o ciclo CAV, principais métodos ativos para EE. A abordagem da DSR para elaboração de artefatos, delineamento e processo estruturado, modelos conceituais e aplicações.
Finding hidden order in spin models with persistent homology
Creators: name: Olsthoorn, Bart
name: Hellsvik, Johan
name: Balatsky, Alexander V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Persistent homology (PH) is a relatively new field in applied mathematics that studies the components and shapes of discrete data. In this work, we demonstrate that PH can be used as a universal framework to identify phases in spin models, including hidden order such as spin nematic ordering and spin liquids. By converting a small number of spin configurations to barcodes we obtain a descriptive picture of configuration space. Using dimensionality reduction to reduce the barcode space to color space leads to a visualization of the phase diagram.
description: 8 pages, 6 figures
The Latitude of Type I X-Ray Burst Ignition on Rapidly Rotating Neutron Stars
Creators: name: Cooper, Randall L.
name: Narayan, Ramesh
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the latitude at which type I X-ray bursts are ignited on rapidly rotating accreting neutron stars. We find that, for a wide range of accretion rates, ignition occurs preferentially at the equator, in accord with the work of Spitkovsky et al. However, for a range of accretion rates below the critical rate above which bursts cease, ignition occurs preferentially at higher latitudes. The range of accretion rates over which nonequatorial ignition occurs is an increasing function of the neutron star spin frequency. These findings have significant implications for thermonuclear flame propagation, and they may explain why oscillations during the burst rise are detected predominantly when the accretion rate is high. They also support the suggestion of Bhattacharyya & Strohmayer that non-photospheric radius expansion double-peaked bursts and the unusual harmonic content of oscillations during the rise of some bursts result from ignition at or near a rotational pole.
description: 4 pages, 2 figures, accepted by ApJL