cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Deliverable D2.1 - Ecosystem analysis and 6G-SANDBOX facility design
Creators: name: Makropoulos, George
name: Koumaras, Harilaos
name: Georgoulas, Spyros
name: Papakyriakou, Athanasios
name: Pitsilis, Vasilis
name: Luque-Schempp, Francisco
name: Herrera, Pablo
name: Merino, Pedro
name: Rico, Delia
name: García, Bruno
name: Díaz, Almudena
name: Wang, Hua
name: Tsolkas, Dimitris
name: Fotis, Giannis
name: Gkatzios, Nikolaos
name: Theodoropoulos, George
name: Koumaras, Vaios
name: Gavras, Anastasius
name: Salkintzis, Apostolis
name: Lazaropoulos, Nikolaos
name: Sianes, Jorge
name: Reyes, Pablo
name: Guillén, David Artuñedo
name: Macías Portela, Jesús
name: Torrealba Ferrer, Arturo José
name: Setaki, Fofy
name: Mesogiti, Ioanna
name: Theodoropoulou, Eleni
name: Torres, Juan
name: Yu, Hao
name: Guo, Qize
name: Farhoudi, Mohammad
name: Ming, Zhao
name: Taleb, Amine
name: Montero, Rubén
name: Rodríguez, Bruno
name: Mowla, Munjure
name: Flizikowski, Adam
name: Riemer, Björn
Publisher: name: Zenodo
Year: 2023

description: This document provides a comprehensive overview of the core aspects of the 6G-SANDBOX project. It outlines the project's vision, objectives, and the Key Performance Indicators (KPIs) and Key Value Indicators (KVIs) targeted for achievement. The functional and non-functional requirements of the 6G-SANDBOX Facility are extensively presented, based on a proposed reference blueprint. A detailed description of the updated reference architecture of the facility is provided, considering the requirements outlined. The document explores the experimentation framework, including the lifecycle of experiments and the methodology for validating KPIs and KVIs. It presents the key technologies and use case enablers towards 6G that will be offered within the trial networks. Each of the platforms constituting the 6G-SANDBOX Facility is described, along with the necessary enhancements to align them with the project's vision in terms of hardware, software updates, and functional improvements.
A complete characterisation of the orbital shapes of the non-circular Kerr geodesic solutions with circular orbit constants of motion
Creators: name: Mummery, Andrew
name: Balbus, Steven
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present analytical solutions describing a family of both inwardly and outwardly spiralling orbits in the Kerr spacetime. The solutions are exact, and remarkable for their simplicity. These orbits all have the angular momentum and energy of a circular orbit at some radius $r_c$, but are not restricted to remaining on that circular orbit, a property not possible in Newtonian gravity. We demonstrate that there are five distinct orbital solutions which terminate at the black hole singularity, and three solutions which either escape to infinity or remain bound. The different orbital solutions are characterised entirely by the black hole spin $a$ and the location of $r_c$. Photon orbits spiralling into or out of their (unstable) circular orbit radii are also analysed. These have properties similar to the hyperbolic class of massive particle orbits discussed herein.
description: 14 pages, 10 figures. Comments welcomed
Steiner and tube formulae in 3D contact sub-Riemannian geometry
Creators: name: Barilari, Davide
name: Bossio, Tania
Publisher: name: arXiv
Year: 2023
Subjects: subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: We prove a Steiner formula for regular surfaces with no characteristic points in 3D contact sub-Riemannian manifolds endowed with an arbitrary smooth volume. The formula we obtain, which is equivalent to a half-tube formula, is of local nature. It can thus be applied to any surface in a region not containing characteristic points. We provide a geometrical interpretation of the coefficients appearing in the expansion, and compute them on some relevant examples in three-dimensional sub-Riemannian model spaces. These results generalize those obtained in 10.1016/j.na.2015.05.006 and arXiv:1703.01592v3 for the Heisenberg group.
description: 31 pages. To appear in Communications in Contemporary Mathematics
Studies of organochromium chelate complexes
Creators: name: Marchese., Anthony Lawrence
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Exciton ground-state energy with full hole warping structure
Creators: name: Combescot, Roland
name: Shiau, Shiue-Yuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Most semiconductors, in particular III-V compounds, have a complex valence band structure near the band edge, due to degeneracy at the zone center. One peculiar feature is the warping of the electronic dispersion relations, which are not isotropic even in the vicinity of the band edge. When the exciton, all important for the semiconductor optical properties, is considered, this problem is usually handled by using some kind of angular averaging procedure, that would restore the isotropy of the hole effective dispersion relations. In the present paper, we consider the problem of the exciton ground-state energy for semiconductors with zinc-blende crystal structure, and we solve it exactly by a numerical treatment, taking fully into account the warping of the valence band. In the resulting four-dimensional problem, we first show exactly that the exciton ground state is fourfold degenerate. We then explore the ground-state energy across the full range of allowed Luttinger parameters. We find that the correction due to warping may in principle be quite large. However, for the semiconductors with available data for the band structure we have considered, the correction turns out to be in the $10\% - 15\%$ range.
description: 10 pages, 1 figure
Improved Classical and Quantum Random Access Codes
Creators: name: Liabøtrø, Ola
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A (Quantum) Random Access Code ((Q)RAC) is a scheme that encodes $n$ bits into $m$ (qu)bits such that any of the $n$ bits can be recovered with a worst case probability $p>\frac{1}{2}$. Such a code is denoted by the triple $(n,m,p)$. It is known that $n<4^m$ for all QRACs and $n<2^m$ for classical RACs. These bounds are also known to be tight, as explicit constructions exist for $n=4^m-1$ and $n=2^m-1$ for quantum and classical codes respectively. We generalize (Q)RACs to a scheme encoding $n$ $d$-levels into $m$ (qu)-$d$-levels such that any $d$-level can be recovered with the probability for every wrong outcome value being less than $\frac{1}{d}$. We construct explicit solutions for all $n\leq \frac{d^{2m}-1}{d-1}$. For $d=2$, the constructions coincide with those previously known. We show that the (Q)RACs are $d$-parity-oblivious, generalizing ordinary parity-obliviousness. We further investigate optimization of the success probabilities. For $d=2$, we use the measure operators of the previously best known solutions, but improve the encoding states to give a higher success probability. We conjecture that for maximal $(n=4^m-1,m,p)$ QRACs, $p=\frac{1+\frac{1}{(\sqrt{3}+1)^m-1}}{2}$ is possible and show that it is an upper bound for the measure operators that we use. When we compare $(n,m,p_q)$ QRACs with classical $(n,2m,p_c)$ RACs, we can always find $p_q\geq p_c$, but the classical code gives information about every input bit simultaneously, while the QRAC only gives information about a subset. For several different $(n,2,p)$ QRACs, we see the same trade-off, as the best $p$ values are obtained when the number of bits that can be obtained simultaneously is as small as possible. The trade-off is connected to parity-obliviousness, since high certainty information about several bits can be used to calculate probabilities for parities of subsets.
description: 14 pages, 1 figure
Bacurau: Toward a New Revolutionary Cinema
Creators: name: Κουμαραδιός, Χρήστος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Καινοτόμες Ιστορικές Ταινίες
Μεταμοντέρνα Εποχή
Επαναστατικός Κινηματογράφος
Innovative History Films
Postmodern Age
Revolutionary Cinema

description: Στο History on Film/ Film on History (2006), ο Robert A. Rosenstone είδε αρκετές ιστορικές ταινίες προερχόμενες από τον Τρίτο Κόσμο ως διαδόχους των καινοτόμων ιστορικών ταινιών που δημιούργησε ο Sergei Eisenstein τη δεκαετία του 1920. Σε αυτού του είδους τις ταινίες, η ιστορική εστίαση μετατοπίζεται από το άτομο στις μάζες. Σύμφωνα με τον Rosenstone, οι καινοτόμες ιστορικές ταινίες γυρίζονται συνήθως από αριστερούς σκηνοθέτες που σκόπιμα απομακρύνονται από τα πρότυπα του mainstream κινηματογράφου αναζητώντας μια νέα κινηματογραφική γλώσσα ικανή να χειριστεί ιστορικά θέματα με τρόπο πιο περίπλοκο και ριζοσπαστικό. Ένα πρόσφατο παράδειγμα μιας τέτοιας ταινίας είναι το Bacurau του 2019, σε σενάριο και σκηνοθεσία των Kleber Mendonça Filho και Juliano Dornelles. H έρευνα αυτή υποδεικνύει ότι το Bacurau, παρόλο που διαδραματίζεται στο εγγύς μέλλον μπορεί να διαβαστεί ως μια «κεκαλυμμένη» ιστορική ταινία αφού καταφέρνει επιτυχώς να καταπιαστεί τόσο με το παρελθόν όσο και με το παρόν της Βραζιλίας. Η μεταμοντέρνα αισθητική του που συνδυάζει επιδέξια το πολιτικά φορτισμένο Cinema Novo με τις ταινίες είδους του Χόλιγουντ σύντομα το μετατρέπει σε μια πολιτική αλληγορία πάνω στην (νεο)αποικιοκρατία, καθώς και στα πολλά ελαττώματα της προεδρίας του Jair Bolsonaro. Αυτή η εργασία φιλοδοξεί να δείξει ότι το Bacurau, συνενώνοντας δύο διαφορετικά κινηματογραφικά λεξιλόγια, προτείνει ένα νέο είδος επαναστατικού κινηματογράφου, συμβατό με τη μεταμοντέρνα εποχή μας: ψυχαγωγικό και συνάμα επαναστατικό
description: In History on Film/ Film on History (2006), Robert A. Rosenstone saw several historical films emanating from the Third World as successors to the innovative history films made by Sergei Eisenstein in the 1920s. In such films, the historical focus shifts from the individual to the masses. According to Rosenstone, innovative history films are usually made by left-wing directors who purposefully depart from the norms of mainstream cinema in search of a new filmic language capable of addressing historical issues in a more complex and radical way. One recent example of a film like that is 2019’s Bacurau, written and directed by Kleber Mendonça Filho and Juliano Dornelles. This research suggests that Bacurau, even though it takes place in the near future, can be read as a ‘disguised’ historical film, as it successfully manages to evoke both the past and the present of Brazil. Its postmodern aesthetics — it skillfully combines the politically charged Cinema Novo with the Hollywood genre film — soon turn it into a political allegory about (neo)colonialism and the many shortcomings of Jair Bolsonaro’s presidency. This thesis aspires to show that Bacurau, by bringing together two different cinematic vocabularies proposes a new kind of revolutionary cinema, compatible with our postmodern age: οne that is equally entertaining and rebellious
Signatures of physical constraints in rotating rigid bodies
Creators: name: Guillen, G. J. Gutierrez
name: Arroyo, E. Aldo
name: Mardesic, P.
name: Sugny, D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Classical Physics (physics.class-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study signatures of physical constraints on free rotations of rigid bodies. We show analytically that the physical or non-physical nature of the moments of inertia of a system can be detected by qualitative changes both in the Montgomery Phase and in the Tennis Racket Effect.
description: 28 pages, 8 figures
title: Software algorithms evaluation platform using a Docker-based framework
Creators: name: Abdel Naby, Acil Ramadan Ibrahim
Publisher: name: Memorial University of Newfoundland
Year: 2021

description: Automating the evaluation of algorithms is a complex task that involves many dependencies, e.g., the inputs, outputs, the compilers, interpreters, execution environments, libraries, operating systems, and hardware dependencies. Each algorithm requires specific performance evaluation criteria to evaluate it during and after execution. This work presents a ADESA (Automatic Deployment and Evaluation of Software Algorithms) framework based on a Docker framework for automating the execution of the algorithms provided by the user and automating the evaluation of these algorithms. The framework is applied to the automatic evaluation of image processing algorithms (AEIPA). AEIPA automates the processes of searching for a matching data set or uploading new data sets, uploading a new image processing algorithm (IPA) that has been developed using any programming language, searching for matching IPAs, executing all those IPAs with one or more data set, and comparing the results of the executed IPAs using each data set. As a case study, two face detection algorithms that implement the Haar Cascade classifier using C with OpenCV and Python with OpenCV, have been used to evaluate AEIPA. Results from this work confirm that AEIPA supports the execution of different programming languages using Docker images.
Assessment of Health-Related quality of life and associated factors among type II Diabetic patients in ayder Comprehensive Specialized hospital, Tigray, Ethiopia.
Creators: name: Kalayu, Hiluf
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Background: The overall prevalence of diabetic mellitus has increased from 171 million in 2000 to 366 million in 2030. Health-related quality of life of patients is essential in health economic evaluations. Type II diabetes shows a significantly greater decline in quality of life but data on Ethiopian population is rare. Objective: This study aims to estimate health related quality of life, and associated factors among type II diabetic patients in Ayder comprehensive specialized hospital Tigray, Ethiopia. Methods: A hospital-based cross-sectional study was carried out on 415 type II diabetic patients. Health outcomes were calculated in micro soft-excel and all the possible health states were valued by a general reference population of Zimbabwe tariff. The EQ-5D-3L instrument was used to evaluate patients' self-reported health status. An ordinary logistic regression analysis was used to show a significant association of factors with a health related quality of life. Result: Overall, 415 patients participated in this study, with a mean age (± standard deviation) of 56.7 years (± 11.33). The total mean quality of life of the study participants was 0.73 (± 0.23) and the total quality adjusted life year for study participants was 2172.6. Quality of life for type II diabetic patients was mostly affected in the anxiety and depression component. Level 2, level 3 anxious patients were 1.77 times more affected than level 1 with (odd ratio = 1.77, p =0.02) and level 3 anxious patients were 2.74 more affected than level 1 with (odd ratio = 2.74, p =0.04). The study participants had an average 7.4 years of follow up with type II diabetic treatments. Variables which had a significant association with health-related quality of life were, age, occupation, monthly income, long waiting time and the presence of diabetic complications. Conclusion: The results of this study revealed a relatively low health status (0.73) among type 2 diabetic patients as compared with the Zimbabwean general population health states (0.842). Quality of life for type II diabetic patients was mostly affected in the anxiety and depression component. It could be Worthwhile if the hospital assigns psychiatry professionals for regular and effective counseling.
Properties of low-dimensional collective variables in the molecular dynamics of biopolymers
Creators: name: Meloni, R.
name: Camilloni, C.
name: Tiana, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biomolecules (q-bio.BM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The description of the dynamics of a complex, high-dimensional system in terms of a low-dimensional set of collective variables Y can be fruitful if the low dimensional representation satisfies a Langevin equation with drift and diffusion coefficients which depend only on Y. We present a computational scheme to evaluate whether a given collective variable provides a faithful low-dimensional representation of the dynamics of a high-dimensional system. The scheme is based on the framework of finite-difference Langevin-equation, similar to that used for molecular-dynamics simulations. This allows one to calculate the drift and diffusion coefficients in any point of the full-dimensional system. The width of the distribution of drift and diffusion coefficients in an ensemble of microscopic points at the same value of Y indicates to which extent the dynamics of Y is described by a simple Langevin equation. Using a simple protein model we show that collective variables often used to describe biopolymers display a non-negligible width both in the drift and in the diffusion coefficients. We also show that the associated effective force is compatible with the equilibrium free--energy calculated from a microscopic sampling, but results in markedly different dynamical properties.
title: Negative Zahlen in der Grundschule
title: Ein Erfahrungsbericht aus einem laufenden Projekt mit der Laborschule Bielefeld
titleType: AlternativeTitle
Creators: name: Hattermann, Mathias
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Das Forschungs- und Entwicklungsprojekt Positive Beispiele zu negativen Zahlen erfolgt in Kooperation der Universität Bielefeld und der Laborschule Bielefeld. Innerhalb des Projektes arbeiten zwei Lehrerinnen, ein Lehrer, der Leiter der Wissenschaftlichen Einrichtung und eine wissenschaftliche Hilfskraft mit zwei Wissenschaftlern des Institutes für Didaktik der Mathematik der Universität zusammen, um konstruktive Hinweise zum schulbasierten Umgang mit ganzen Zahlen in verschiedenen Jahrgangsstufen zu erarbeiten.
Analyzing the Large-Scale Bulk Flow using CosmicFlows4: Increasing Tension with the Standard Cosmological Model
Creators: name: Watkins, Richard
name: Allen, Trey
name: Bradford, Collin James
name: Ramon, Albert
name: Walker, Alexandra
name: Feldman, Hume A.
name: Cionitti, Rachel
name: Al-Shorman, Yara
name: Kourkchi, Ehsan
name: Tully, R. Brent
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an estimate of the bulk flow in a volume of radii $150-200h^{-1}$Mpc using the minimum variance (MV) method with data from the CosmicFlows-4 (CF4) catalog. The addition of new data in the CF4 has resulted in an increase in the estimate of the bulk flow in a sphere of radius $150h^{-1}$Mpc relative to the CosmicFlows-3 (CF3). This bulk flow has less than a $0.03\%$ chance of occurring in the Standard Cosmological Model ($Λ$CDM) with cosmic microwave background derived parameters. Given that the CF4 is deeper than the CF3, we were able to use the CF4 to accurately estimate the bulk flow on scales of $200h^{-1}$Mpc (equivalent to 266 Mpc for Hubble constant $H_o=75$ km/s/Mpc) for the first time. This bulk flow is in even greater tension with the Standard Model, having less than $0.003\%$ probability of occurring. To estimate the bulk flow accurately, we introduce a novel method to calculate distances and velocities from distance moduli that is unbiased and accurate at all distances. Our results are completely independent of the value of $H_o$.
description: 9 pages, 8 figures, 1 table
Assessment of the prevalence and associated factors of birth preparedness and complication readiness among pregnant women in public health centers of Addis Abeba,Ethiopia.
Creators: name: Sileshi, Rediate
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Background; - Ethiopia is one of the countries with higher maternal mortality in the world that was estimated 11,000 in 2015 alone. Birth preparedness and complication readiness (BPCR) is important measure to improve utilization of maternal health which contributes for reducing maternal mortality. BPCR is a comprehensive package aimed at promoting timely access to skilled maternal and neonatal services. But limited study was found in Addis Ababa on BP/CR Objective: - To determine the prevalence and associated factors of birth preparedness and complication readiness among pregnant women in public health centers in Addis Ababa Method: - Facility based cross-sectional study was done in selected ten health centers in Addis Ababa. Multistage sampling technique was used to select health facilities by taking clients flow chart into account. Training was given to the data collectors prior to data collection. There were ten data collectors and two supervisors. Data was collected from March to April 2019 using structured questioner which was pretested in other health center. Then data was entered to Epi-data software version 3.1 by the principal investigator and SPSS 20 software program was used to analyze the entered data. OR were used to measure association and 95% CI and P-Value<0.05 were used as predictors of significant association. Binary and multivariable logistic regression was tatted. Result: - A total of 633 pregnant mothers were participated in the study. 322 (50.9%) of the participants were prepared for birth and ready for complication management. Mothers who came for ANC follow up and have ultrasound were found to be 98.3%. Government employee mothers (AOR=2.29 1.03, 5.09), educated mothers secondary (AOR=2.459; 1.002, 5.038), preparatory (AOR=3.254; 1.245, 8.506) and tertiary (AOR= 3.001; 1.173, 7.679), decision making power (AOR=0.56: 0.33, 0.95), and counseling on danger sign (AOR=1.78; 1.196 2.65), and counseling on birth preparedness complication readiness during ANC visit (AOR=1.395; 1.90, 2.16) had found significantly associated with birth preparedness complication readiness. Conclusion and recommendation: - Birth preparedness and complication readiness was low among study participants. Even if there were higher prevalence of ultrasound, Most birth prepared and complication ready mothers were those who were counseled. I suggest health providers to give more attention on counseling on danger sign and birth preparedness and complication readiness
Bichromatic UV detection system for atomically-resolved imaging of ions
Creators: name: Nordmann, T.
name: Wickenhagen, S.
name: Doležal, M.
name: Mehlstäubler, T. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a compact and bichromatic imaging system, located outside of the vacuum chamber of a trapped ion apparatus, that collects the fluorescence of 230.6 nm and 369.5 nm photons simultaneously on a shared EMCCD camera. The system contains two lens doublets, consisting of a sphere and an asphere. It provides a numerical aperture of 0.45 and 0.40 at 230.6 nm and 369.5 nm, respectively, and enables spatially resolved state detection with a large field of view of 300 $μ$m for long $^{115}$In$^+$/$^{172}$Yb$^+$ Coulomb crystals. Instead of diffraction limited imaging for one wavelength, the focus in this system is on simultaneous single-ion resolved imaging of both species over a large field with special attention to the deep UV wavelength (230.6 nm) and the low scattering rate of In$^+$ ions. The introduced concept is applicable to other dual-species applications.
Report on TBS sorting efficiency and sorting trials
Creators: name: Polysecure GmbH
Publisher: name: Zenodo
Year: 2023
Subjects: flexible food packaging
food packaging
circular packaging
packaging
flexible packaging
sorting
tracer based sorting

description: The use of recycled materials in plastic based products of any kind is growing in importance in light of global problems and EU-imposed regulations targeting recycling content in freshly produced plastic packaging items. Packaging material in contact with sensitive goods such as food is required to match at least 25% of recycling content by 2030. As of now, only Polyethylene-Terephthalate (PET) fullfills the strict regulations on recycling-infeed-material’s origin, due to its unique collection scheme and intrinsic material properties regarding non-intentionally added substances in the recycling process.

With Polyethylene (PE) making up a significant part of food-grade plastic packaging items in the market, a solution for PE-based material must be developed. Furthermore, there is another challenge: ensuring the recycling process waste input material’s origin as food-grade. As there are no instrinsic material properties deployable to tell for separating the food-grade from non-food-grade packaging, tracers are implemented in the packaging items and used as a sorting criterion in the state-of-the-art sorting machines for flexibles. The entire process only requires minor adaptations to the detection system in place by adding a tracer excitation source.

A total of 315 kg freshly produced, traced food-grade mono PE-based multilayered flexible packaging material has been produced by AMCOR and pouches thereof have been produced at NESTLE for food packaging. These pouches were then mixed with household PE-rich flexible packaging waste at a ratio of 1:1 and sorted in a state-of-the-art flexible packaging sorting line at the Steinert Technical Center in Cologne, Germany, at industrial conditions of 4.5 m/s conveyor belt speed and 30% belt coverage, resulting in a material throughput of 1.0 tons / hour / meter-belt-width. In a two-step-sorting-process, a purity of over 97% in food-grade packaging items has been achieved, while maintaining a sorting efficiency as high as 89%.

This report demonstrates an industrially viable and relevant sorting process, paving the way towards circular use of food-grade mono PE-based multi-layered flexible packaging material by using Polysecure’s tracer-based-sorting technology adapted to state-of-the-art NIR-sorting lines.

 

Note: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 101003806.
Three-generation neutrino oscillations in curved spacetime
Creators: name: Zhang, Yu-Hao
name: Li, Xue-Qian
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Three-generation MSW effect in curved spacetime is studied and a brief discussion on the gravitational correction to the neutrino self-energy is given. The modified mixing parameters and corresponding conversion probabilities of neutrinos after traveling through celestial objects of constant densities are obtained. The method to distinguish between the normal hierarchy and inverted hierarchy is discussed in this framework. Due to the gravitational redshift of energy, in some extreme situations, the resonance energy of neutrinos might be shifted noticeably and the gravitational effect on the self-energy of neutrino becomes significant at the vicinities of spacetime singularities.
description: 25 pages, 5 figures, 2 tables. Some changes are made according to referee's suggestions. The final version is to be published at Nuclear Physics B
Robust Data-driven Metallicities for 175 Million Stars from Gaia XP Spectra
Creators: name: Andrae, Rene
name: Rix, Hans-Walter
name: Chandra, Vedant
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We derive and publish data-driven estimates of stellar metallicities [M/H] for 175 million stars with low-resolution XP spectra published in Gaia DR3. The [M/H] values, along with Teff and logg, are derived using the XGBoost algorithm, trained on stellar parameters from APOGEE, augmented by a set of very metal-poor stars. XGBoost draws on a number of data features: the full set of XP spectral coefficients, narrowband fluxes derived from XP spectra, and broadband magnitudes. In particular, we include CatWISE magnitudes, as they reduce the degeneracy of Teff and dust reddening. We also include the parallax as a data feature, which helps constrain logg and [M/H]. The resulting mean stellar parameter precision is 0.1 dex in [M/H], 50 K in Teff, and 0.08 dex in logg. This all-sky [M/H] sample is substantially larger than published samples of comparable fidelity across -3<[M/H]<+0.5. Additionally, we provide a catalog of over 17 million bright (G<16) red giants whose [M/H] are vetted to be precise and pure. We present all-sky maps of the Milky Way in different [M/H] regimes that illustrate the purity of the dataset, and demonstrate the power of this unprecedented sample to reveal the Milky Way's structure from its heart to its disk.
description: 19 pages, 18 figures, accepted by ApJS
Καταστατική εξίσωση και δομή αστέρων νετρονίων από θεωρητικά μοντέλα πεδίων
Creators: name: Πιτέλης, Σωτήριος Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Αστέρες νετρονίων
Καταστατική εξίσωση
Θεωρητικά μοντέλα πεδίου
Neutron stars
Equation of state
Theoretical field models

description: Η μελέτη του φασικού διαγράμματος και των ιδιοτήτων της ισχυρής αλληλεπίδρασης αποτελεί ενεργό ενδιαφέρον των πυρηνικών φυσικών και αστροφυσικών. Μια δημοφιλής προσέγγιση είναι η μελέτη των αστέρων νετρονίων, των οποίων το εσωτερικό αποτελεί περιβάλλον με εξαιρετικά υψηλές πυκνότητες σωματιδίων. Το μεγαλύτερο μέρος αυτής της ερευνητικής προσέγγισης είναι κυρίως φαινομενολογικό, αλλά έχουν εμφανιστεί και κάποια μοντέλα τέτοιων αστέρων σε θεωρία πεδίου. Ο σκοπός αυτής της μελέτης είναι να εξαχθεί η καταστατική εξίσωση από ένα δυνάμει θεωρητικό μοντέλο πυκνής ύλης, και να εφαρμοστεί σε αστέρες νετρονίων για να προσδιοριστούν τα αναμενόμενα χαρακτηριστικά τους. Αξίζει να αναφερθεί ότι τα νέα επίγεια παρατηρητήρια βαρυτικών κυμάτων LIGO και Virgo αποτελούν μια νέα πύλη στη μελέτη της συμπεριφοράς των αστέρων νετρονίων. Μέσω βαρυτικών κυμάτων μπορούν να προσδιοριστούν η τετραπολική ορμή (και άρα η παλιρροιακή παραμόρφωση / tidal deformability) τέτοιων αστέρων, ενώ το εύρος της ακτίνας και η μέγιστη μάζα τους μπορεί να περιοριστεί μέσω συνδυαστικής μελέτης βαρυτικών κυμάτων και ηλεκτρομαγνητικών σημάτων. Επιπλέον, η διάταξη NICER στο διεθνή διαστημικό σταθμό μπορεί να προσδιορίσει τις ακτίνες τέτοιων αστέρων με μεγάλη ακρίβεια, αυξάνοντας έτσι τους περιορισμούς στην καταστατική τους εξίσωση. Όλα τα παραπάνω παρέχουν μια πληθώρα δεδομένων που μπορεί να καθοδηγήσει την ανάπτυξη διαφορετικών θεωρητικών μοντέλων για το εσωτερικό των αστέρων νετρονίων
description: The study of the strong interaction phase diagram and its properties is an active interest of nuclear physicists and nuclear astrophysicists. A popular approach is the study of neutron stars, whose interior exhibits extremely high particle densities. Most of that line of research has been largely phenomenological, with a few field theory models scattered between. The aim of this study is to extract the equation of state (henceforth EoS) of a potential theoretical field models of dense matter, and to apply that EoS to neutron stars and extract their expected characteristics. Notably, the recently established terrestrial gravitational wave observatories LIGO and Virgo offer a new window to the behavior of neutron stars. Through gravitational waves, a star's quadrupole moment (and thus tidal deformability) can be determined, and the radii and maximum masses of such stars can be constrained through the combination of gravitational waves and electromagnetic signals. In addition, the NICER detector aboard the ISS can determine such stars' radii with great accuracy, further refining the expected behavior of the EoS. All the above provide a wealth of data that can guide the development of (and selection between) different field models for the interior of neutron stars
Clinical Presentation, Treatment Outcome and Survival of HIV Positive Tb Patients on Short Course Dots in Hawassa Health Center
Creators: name: Shaweno, Debebe
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2010

description: Background information: In contrast to, many initiatives implemented to tackle Tuberculosis, many countries have not so far reached the targets set by WHO. The main reason mentioned so far was the impact of HIV infection. Therefore, it is essential to determine the impact of HIV/AIDs on the clinical presentation and treatment outcome of tuberculosis locally. Objectives: To compare clinical presentation, treatment outcome of TB and on treatment survival among HIV positive and negative TB patients who are through (DOTs). Methods: A retrospective cohort study design was employed to compare the clinical presentation of TB and its respective treatment outcome between the exposed; HIV positive (n=370) and non exposed; HIV negative TB patients (n=370) who were through the short course DOTs in Hawassa Health Center from 2006-2010. Patient's HIV status during the diagnosis of TB or initiation of DOTs was considered as an exposure and TB treatment outcome was considered as the outcome variables. Standard WHO definition, is used to classify tuberculosis cases and TB treatment outcomes. Results: Smear negative PTB was significantly the frequent presentation, 0.32, 95%CI (0.25, 0.39; Z=8.76, P=0.000) among HIV positive study subjects, while significant difference in proportion of smear positive PTB; (-0.26; 95%CI (-0.33 -0.19; Z=-6.25, P=0.000) was in favor of HIV negative individuals. Compared to HIV negative TB patients ,cure rate was substantially lower in HIV positive TB patients (73% vs. 87.9%, z=-2.5, P=0.04), and the risk of death was statistically higher among TB/HIV co infected patients; AHR=1.6, 95%CI(1.01-2.6) during the course of DOTs. Regarding survival of TB patients, the survival probability was lower for HIV/TB co infected patients (Log rank test= 6.90, df= 2,P= 0.008).When adjusted for covariates, the survival probability is below 15% for HIV positive but above 85% in HIV negative TB patients at the end of DOTs period(8th month). The independent predictors of death, while on treatment are age, weight and HIV infection. Conclusion: On TB treatment survival probability and cure rate are substantially lower in HIV infected TB patients due to an increased death and unfavorable treatment out comes for the former and the later respectively. Therefore targeted and comprehensive management of TB should be considered in this group of patients. Key words: Clinical presentation, treatment outcome, survival of TB patients, Hawassa health center
Exercise protects against obesity induced semen abnormalities via downregulating stem cell factor, upregulating Ghrelin and normalizing oxidative stress
Creators: name: Alhashem, Fahaid
name: Alkhateeb, Mahmoud
name: Alshahrani, Mesfer
name: Elrefaey, Hesham
name: Alsunaidi, Mohammad
name: Alessa, Riyad
name: Sakr, Hussein
name: Sarhan, Mohammad
name: Eleawa, Samy M.
name: Khalil, Mohammad A.
Publisher: name: Technische Universität Dortmund
Year: 2014
Subjects: subject: Stem cell factor
subject: Ghrelin
subject: infertility
subject: diet induced obesity
subject: exercise
subject: Orlistat
subject: 610

description: Increased oxidative stress and hormonal imbalance have been hypothesized to underlie infertility in obese animals. However, recent evidence suggests that Ghrelin and Stem Cell Factor (SCF) play an important role in fertility, in lean individuals. Therefore, this study aimed at investigating whether changes in the levels of Ghrelin and SCF in rat testes underlie semen abnormal parameters observed in obese rats, and secondly, whether endurance exercise or Orlistat can protect against changes in Ghrelin, SCF, and/or semen parameters in diet induced obese rats. Obesity was modelled in male Wistar rats using High Fat Diet (HFD) 12-week protocol. Eight week-old rats (n=40) were divided into four groups, namely, Group I: fed with a standard diet (12 % of calories as fat); Group II: fed HFD (40 % of calories as fat); Group III: fed the HFD with a concomitant dose of Orlistat (200 mg/kg); and Group IV: fed the HFD and underwent 30 min daily swimming exercise. The model was validated by measuring the levels of testosterone, FSH, LH, estradiol, leptin, triglycerides, total, HDL, and LDL cholesterol, and final change in body weight. Levels were consistent with published obesity models (see Results). As predicted, the HFD group had a 76.8 % decrease in sperm count, 44.72 % decrease in sperm motility, as well as 47.09 % increase in abnormal sperm morphology. Unlike the control group, in the HFD group (i.e. obese rats) Ghrelin mRNA and protein were elevated, while SCF mRNA and protein were diminished in the testes. Furthermore, in the HFD group, SOD and GPx activities were significantly reduced, 48.5±5.8 % (P=0.0012) and 45.6±4.6 % (P=0.0019), respectively, while TBARS levels were significantly increased (112.7±8.9 %, P≤0.0001). Finally, endurance exercise training and Orlistat administration individually and differentially protected semen parameters in obese rats. The mechanism includes, but is not limited to, normalizing the levels of Ghrelin, SCF, SOD, GPx and TBARS. In rat testes, diet induced obesity down regulates SCF expression, upregulates Ghrelin expression, and deteriorate oxidative stress levels, which are collectively detrimental to semen parameters. Exercise, and to a lesse r extent Orlistat administration, protected effectively against this detrimental effect.
description: EXCLI Journal ; Vol. 13, 2014
Cyclooxygenase and prostaglandin E2 at rest, during exercise and across extremes of temperature within healthy humans: The influence of acetaminophen
Creators: name: Esh, Chris
Publisher: name: Loughborough University
Year: 2023
Subjects: Sports science and exercise not elsewhere classified

description: Global temperatures are continuing to rise whilst there are still extremes of cold to be endured. In these extremes of temperature, occupational pursuits and (ultra)endurance events are becoming more arduous and popular respectively. Indeed, within both occupational and exercise settings, exposure to extreme heat (e.g. exercise heat stress) is often preceded and/or followed by extreme cold [e.g., cold-water immersion (CWI)]. During such extremes, various integrated thermoregulatory mechanisms are employed to maintain homeostatic human core temperature (Tc) at ~37 °C. One mechanism that is currently poorly characterised and understood, is the cyclooxygenase (COX) prostaglandin E2 (PGE2) pathway. PGE2 is synthesised from one of the two COX isoforms (COX1, COX2) and is the mediator of fever. Below the thermoneutral zone (TNZ), COX/PGE2 are implicated in afebrile thermoregulation in mice and humans. In mice, acetaminophen (ACT) decreased Tc by ~3 °C alongside ~96% reductions in PGE2. Following ACT ingestion in humans: (i) at an ambient temperature of 20°C Tc decreased by ~0.19 °C; and (ii) at an ambient temperature of 10 °C Tc decreased by ~0.42 °C; Tc remained stable in placebo conditions. The data from humans lacks analysis of COX/PGE2 concentrations, hence the poor understanding of whether the COX/PGE2 pathway is implicated within humans during in the defence of Tc in light of temperature challenge. Therefore, this thesis aims to determine whether the COX/PGE2 pathway is implicated in human Tc defence/regulation during exposure to temperature extremes (cold and hot) and during exercise-heat stress. Additionally, whether ACT alters COX/PGE2 behaviour and thus thermoregulation (e.g. Tc) during these exposures will also be explored. To do this, thesis themes are broadly introduced in Chapter 1 and critically reviewed in Chapter 2. In Chapter 3 the common methods used throughout the thesis are described in full. Nuanced experimental chapter specific methods are included within the respective chapters. Five individual research studies are presented in chapters 4.0 to 8.0 (experimental chapters). The thesis is concluded with general discussion and future research directions sections in Chapter 9. [...]
Nonsinusoidal current-phase relations in semiconductor-superconductor-ferromagnetic insulator devices
Creators: name: Maiani, Andrea
name: Flensberg, Karsten
name: Leijnse, Martin
name: Schrade, Constantin
name: Vaitiekėnas, Saulius
name: Souto, Rubén Seoane
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Coherent tunneling processes of multiple Cooper pairs across a Josephson junction give rise to higher harmonics in the current phase relation. In this work, we propose and study Josephson junctions based on semiconductor-superconductor-ferromagnetic insulator heterostructures to engineer nonsinusoidal current-phase relations. The gate-tunability of charge carriers density in the semiconductor, together with the adjustable magnetization of the ferromagnetic insulator, provides control over the content of the supercurrent harmonics. At finite exchange field, hybrid junctions can undergo a 0\,--\,$π$ phase transition, resulting in the supercurrent reversal. Close to the transition, single-pair tunneling is suppressed and the current-phase relation is dominated by the second-harmonic, indicating transport primarily by pairs of Cooper pairs. Finally, we demonstrate that non-collinear magnetization or spin-orbit coupling in the leads and the junction can lead to a gate-tunable Josephson diode effect with efficiencies of up to $\sim30\%$.
description: 13 pages, 7+1 figures
SPH and α-SPH : applications and analysis
Creators: name: Mansour., John Anthony
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Explanation of $B \to K^{(*)} \ell^+ \ell^-$ and muon $g-2$, and implications at the LHC
Creators: name: Chen, Chuan-Hung
name: Nomura, Takaaki
name: Okada, Hiroshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: More than $3σ$ deviations from the standard model are observed in the angular observable $P'_5$ of $B\to K^* μ^+ μ^-$ and muon $g-2$. To resolve these anomalies, we extend the standard model by adding two leptoquarks. It is found that the signal strength of the diphoton Higgs decay can exhibit a significant deviation from unity and is within the data errors. Although $\ell_i \to \ell_j γ$ puts severe bounds on some couplings, it is found that the excesses of $P'_5$ and muon $g-2$ can still be explained and can be accommodated to the measurement of $B_s\to μ^+ μ^-$ in this model. In addition, the leptoquark effects can also explain the LHCb measurement of $R_K = BR(B^+ \to K^+ μ^+μ^-)/BR(B^+ \to K^+ e^+e^-)=0.745^{+0.090}_{-0.074} \pm 0.036$, which shows a $2.6σ$ deviation from the standard model prediction.
description: 18 pages, 3 figures, 1 table, version accepted by Phys. Rev. D
title: Mulheres doutoras nas universidades portuguesas (1926-1960)
title: Women and PhDs in Portuguese universities (1926-1960)
Creators: name: Homem, Armando Luís de Carvalho
Publisher: name: CICS.NOVA - Centro Interdisciplinar de Ciências Sociais, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2018

description: Procura-se neste trabalho encarar o primeiro arranque de doutoramentos femininos nas Universidades portuguesas, interpretar a sua lenta afirmação e a sua relativa continuidade por cerca de três décadas e meia, com especial incidência nas ciências exactas e na Universidade de Lisboa; e, a fechar, o porquê da sua atenuação na década de 1960.
description: Homem, A. L. de C. (2018). Mulheres doutoras nas universidades portuguesas (1926-1960). Faces de Eva. Estudos sobre a Mulher, (39), 75-92. ISSN: 0874-6885
Nonanomalous heat transport in a one-dimensional composite chain
Creators: name: Olla, Piero
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Translation-invariant low-dimensional systems are known to exhibit anomalous heat transport. However, there are systems, such as the coupled-rotor chain, where translation invariance is satisfied, yet transport remains diffusive. It has been argued that the restoration of normal diffusion occurs due to the impossibility of defining a global stretch variable with a meaningful dynamics. In this Letter, an alternative mechanism is proposed, namely, that the transition to anomalous heat transport can occur at a scale that, under certain circumstances, may diverge to infinity. To illustrate the mechanism, I consider the case of a composite chain that conserves local energy and momentum as well as global stretch, and at the same time obeys, in the continuum limit, Fourier's law of heat transport. It is shown analytically that for vanishing elasticity the stationary temperature profile of the chain is linear; for finite elasticity, the same property holds in the continuum limit.
description: 7 pages 1 figure; supplemental material included
title: Rapporto Astril 2022. Mercato del lavoro, contrattazione e salari in Italia: 1990-2021
Creators: name: Pariboni, Riccardo
name: Levrero, Enrico Sergio
name: Romaniello, Davide
Publisher: name: RomaTrE-Press
Year: 2023

description:

Questo rapporto inquadra le recenti tendenze del mercato del lavoro in Italia in una prospettiva di più lungo periodo, evidenziando l’effetto che il quadro macroeconomico degli ultimi decenni e fattori di natura istituzionale hanno avuto sulla contrattazione salariale e sul tenore di vita della popolazione. I contributi nel volume ricostruiscono l’evoluzione della disoccupazione e sottoccupazione di lavoro, i cambiamenti nella forza contrattuale dei lavoratori, e la dinamica dei salari reali e della quota dei salari nel reddito nazionale, Vi si analizzano poi il fenomeno dei lavoratori poveri, del lavoro in somministrazione e i più recenti cambiamenti legislativi in materia di lavoro e welfare. L’analisi è svolta sia in aggregato che per macroregioni, con anche una comparazione con gli altri principali paesi europei.
Hausdorff dimension of boundaries of relatively hyperbolic groups
Creators: name: Potyagailo, Leonid
name: Yang, Wen-yuan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F67

description: In this paper, we study the Hausdorff dimension of the Floyd and Bowditch boundaries of a relatively hyperbolic group, and show that for the Floyd metric and shortcut metrics respectively, they are are both equal to a constant times the growth rate of the group. In the proof, we study a special class of conical points called uniformly conical points and establish that, in both boundaries, there exists a sequence of Alhfors regular sets with dimension tending to the Hausdorff dimension and these sets consist of uniformly conical points.
The basic morphology of Nangikurungurr
Creators: name: Reid, Nicholas
Publisher: name: The Australian National University
Year: 1982
Subjects: Daly languages
Morphology

description: Nangikurungurr is a language of the Daly River area, situated approximately 150 kms SSW of Darwin. The majority of Nangikurungurr speakers live on or around the Daly River Mission and at Pepiminati, a cattle station near the Moyle River.