cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Integration of hydrothermal liquefaction and carbon capture and storage for the production of advanced liquid biofuels with negative CO2 emissions
Creators: name: Lozano, E. M.
name: Pedersen, T. H.
name: Rosendahl, L. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The technical and economic feasibility to deliver sustainable liquid biocrude through hydrothermal liquefaction (HTL) while enabling negative carbon dioxide emissions is evaluated in this paper, looking into the potential of the process in the context of negative emission technologies (NETs) for climate change mitigation. In the HTL process, a gas phase consisting mainly of carbon dioxide is obtained as a side product driving a potential for the implementation of carbon capture and storage in the process (BECCS) that has not been explored yet in the existing literature and is undertaken in this study. To this end, the process is divided in a standard HTL base and a carbon capture add-on, having forestry residues as feedstock. The Selexol technology is adapted in a novel scheme to simultaneously separate the CO2 from the HTL gas and recover the excess hydrogen for biocrude upgrading. The cost evaluation indicates that the additional cost of the carbon capture can be compensated by revenues from the excess process heat and the European carbon allowance market. The impact in the MFSP of the HTL base case ranges from -7% to 3%, with -15% in the most favorable scenario, with a GHG emissions reduction potential of 102-113% compared to the fossil baseline. These results show that the implementation of CCS in the HTL process is a promising alternative from technical, economic and environmental perspective in future scenarios in which advanced liquid biofuels and NETs are expected to play a role in the decarbonization of the energy system.
HI Deficiencies and Asymmetries in HIPASS Galaxies
Creators: name: Reynolds, T. N.
name: Westmeier, T.
name: Staveley-Smith, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analysis of the sky distribution of neutral hydrogen (HI) deficiency and spectral asymmetry for galaxies detected by the HI Parkes All-Sky Survey (HIPASS) as a function of projected environment density. Previous studies of galaxy HI deficiency using HIPASS were sensitive to galaxies that are extremely HI rich or poor. We use an updated binning statistic for measuring the global sky distribution of HI deficiency that is sensitive to the average deficiencies. Our analysis confirms the result from previous studies that galaxies residing in denser environments, such as Virgo, are on average more HI deficient than galaxies at lower densities. However, many other individual groups and clusters are not found to be on average significantly HI poor, in contradiction to previous work. In terms of HI spectral asymmetries, we do not recover any significant trend of increasing asymmetry with environment density as found for other galaxy samples. We also investigate the correlation between HI asymmetry and deficiency, but find no variation in the mean asymmetry of galaxies that are HI rich, normal or poor. This indicates that there is either no dependence of asymmetry on HI deficiency, or a galaxy's HI deficiency only has a small influence on the measured HI asymmetry that we are unable to observe using only integrated spectra.
description: 11 pages, 7 figures, accepted for publication in MNRAS
Η αθανασία της ψυχής και η μετεμψύχωση στον Πλάτωνα:
Creators: name: Αδάμου, Θεοδώρα Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ψυχή
Αθανασία
Μετεμψύχωση
Soul
Immortality
Reincarnation

description: Σκοπός της διπλωματικής εργασίας είναι να μελετηθούν οι απόψεις του Πλάτωνα σχετικά με την ψυχή στο σύνολο του έργου του. Επειδή όμως το θέμα της ψυχής είναι εκτεταμένο, φάνηκε πιο χρήσιμη και πιο ενδιαφέρουσα η αναζήτηση μέσα στο πλατωνικό έργο των χωρίων εκείνων που φανερώνουν τις αντιλήψεις του φιλοσόφου ειδικά για την αθανασία της ψυχής και τη μετεμψύχωση, που χωρίς αμφιβολία αποτελούν τους βασικούς πυλώνες της μεταφυσικής του φιλοσόφου. Έτσι, έγινε αρχικά μια εκτεταμένη αναφορά στους προδρόμους του Πλάτωνα που ασχολήθηκαν με τη φύση της ψυχής, και ιδιαίτερα στους ορφικούς και πυθαγορείους που επηρέασαν τη διαμόρφωση της πλατωνικής σκέψης όσον αφορά την πίστη στη μετεμψύχωση. Στη συνέχεια, η δομή της διπλωματικής εργασίας θα λέγαμε ότι διαμορφώθηκε με βάση 2 βασικά θέματα: την αθανασία της ψυχής από τη μια και τους μύθους τους σχετικούς με τη μετεμψύχωσή της από την άλλη. Βασική υπήρξε η προσπάθεια να εξεταστούν τα σχετικά χωρία των πλατωνικών διαλόγων με κριτήριο την υπάρχουσα χρονολόγησή τους, ξεκινώντας από τους πιο πρώιμους, με σκοπό να φανεί η αλλαγή και ο εμπλουτισμός των απόψεων του Πλάτωνα κυρίως όσον αφορά τη μετεμψύχωση. Σημαντική υπήρξε τέλος και η παράθεση των απόψεων του Σωκράτη σχετικά με τον θάνατο και την πορεία της ψυχής στη συνέχεια, αφού θεωρείται καταλυτική η επίδραση του στη διαμόρφωση της πλατωνικής διδασκαλίας.
description: The aim of the thesis is to study the views of Plato regarding the soul to the total of his work. Because, however, the subject of the soul is extended, it seemed more useful and interesting to research through the platonic work these passages that reveal the views of the philosopher especially concerning immortality and reincarnation, which undoubtedly constitute the basic pylons of metaphysics of the philosopher. Thus, initially an extended reference was done to the precursors of Plato who inquired about the nature of the soul, and in particular the Orphics and the Pythagoreans that affected the formation of the platonic thought regarding faith and reincarnation. Then, the body of the thesis, we could say, was formed based on 2 basic issues: the immortality of the soul from one part and the myths relative to the reincarnation from the other. Basic was the effort to examine the relative passages of platonic dialogues with the criterion the existing chronology, starting from the earl ones, aiming to show the change and enrichment of the views of Plato mainly regarding the reincarnation. Important was, finally, the citation of the views of Socrates regarding death and then to the course of the soul, his influence is considered as catalytic to the formation of platonic teaching.
Characterization of more than three years of in-orbit radiation damage of SiPMs on GRBAlpha and VZLUSAT-2 CubeSats
Creators: name: Ripa, Jakub
name: Dafcikova, Marianna
name: Kosik, Pavel
name: Munz, Filip
name: Ohno, Masanori
name: Galgoczi, Gabor
name: Werner, Norbert
name: Pal, Andras
name: Meszaros, Laszlo
name: Csak, Balazs
name: Fukazawa, Yasushi
name: Takahashi, Hiromitsu
name: Mizuno, Tsunefumi
name: Nakazawa, Kazuhiro
name: Odaka, Hirokazu
name: Ichinohe, Yuto
name: Kapus, Jakub
name: Hudec, Jan
name: Frajt, Marcel
name: Rezenov, Maksim
name: Daniel, Vladimir
name: Svoboda, Petr
name: Dudas, Juraj
name: Sabol, Martin
name: Laszlo, Robert
name: Koleda, Martin
name: Duriskova, Michaela
name: Szakszonova, Lea
name: Kolar, Martin
name: Husarikova, Nikola
name: Breuer, Jean-Paul
name: Hroch, Filip
name: Vitek, Tomas
name: Vertat, Ivo
name: Urbanec, Tomas
name: Povalac, Ales
name: Kasal, Miroslav
name: Hanak, Peter
name: smelko, Miroslav
name: Topinka, Martin
name: Chang, Hsiang-Kuang
name: Liu, Tsung-Che
name: Lin, Chih-Hsun
name: Hu, Chin-Ping
name: Tsao, Che-Chih
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Silicon photomultipliers (SiPMs) are prone to radiation damage which causes an increase of dark count rate. This leads to an increase in low-energy threshold in a gamma-ray detector combining SiPM and a scintillator. Despite this drawback, they are becoming preferred for scintillator-based gamma-ray detectors on CubeSats due to their low operation voltage, small size, linear response to low light intensity and fast response. This increasing popularity of SiPMs among new spaceborne missions makes it important to characterize their long-term performance in the space environment. In this work, we report the change of the dark count rate and low-energy threshold of S13360-3050 PE multi-pixel photon counters (MPPCs) by Hamamatsu, using measurements acquired by the GRBAlpha and VZLUSAT-2 CubeSats at low Earth orbit (LEO) spanning over three years. Such a long measurement of the performance of MPPCs in space has not been published before. GRBAlpha is a 1U CubeSat launched on March 22, 2021, to a 550 km altitude sun-synchronous polar orbit (SSO) carrying on board a gamma-ray detector based on CsI(Tl) scintillator readout by eight MPPCs and regularly detecting gamma-ray transients such as gamma-ray bursts and solar flares in the energy range of ~30-900 keV. VZLUSAT-2 is a 3U CubeSat launched on January 13, 2022 also to a 535 km altitude SSO carrying on board, among other payloads, two gamma-ray detectors similar to the one on GRBAlpha. We have flight-proven the Hamamatsu MPPCs S13360-3050 PE and demonstrated that MPPCs, shielded by 2.5 mm of PbSb alloy, can be used in LEO environment on a scientific mission lasting beyond three years. This manifests the potential of MPPCs being employed in future satellites.
description: Accepted for publication in Nuclear Instruments and Methods in Physics Research Section A, 17 pages, 18 figures
Sivers Effect Asymmetries in Hadronic Collisions
Creators: name: Bomhof, C. J.
name: Mulders, P. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that weighted azimuthal single spin asymmetries in back-to-back jet or pion production in polarized proton-proton scattering can be written as convolutions of universal distribution and fragmentation functions with gluonic pole cross sections as hard functions. Gluonic pole cross sections are gauge-invariant weighted sums of Feynman diagrams. The weight factors are a direct consequence of the (diagram-dependence of) gauge links. The best known consequence of the gauge links is the generation of the Sivers effect that is a source for single-spin asymmetries. Moreover, due to the dependence of the gauge links on the color-flow of the hard diagram the Sivers effect in SIDIS enters with opposite sign as it does in Drell-Yan scattering. The weight factors in the gluonic pole cross sections are the appropriate generalizations to more complicated processes of this relative sign difference. Furthermore, it is argued that the gluon-Sivers effect appears in twofold.
description: Contribution to the 17th International Spin Physics Symposium (SPIN2006), Kyoto, Japan, Oct. 2-7, 2006
Joint inference on the redshift distribution of fast radio burst and on the intergalactic baryon content
Creators: name: Hackstein, Stefan
name: Brüggen, Marcus
name: Vazza, Franco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context: Fast radio bursts are transient radio pulses of extragalactic origin. Their dispersion measure is indicative of the baryon content in the ionized intergalactic medium between the source and the observer. However, inference using unlocalized fast radio bursts is degenerate to the distribution of redshifts of host galaxies. Method: We perform a joint inference of the intergalactic baryon content and the fast radio burst redshift distribution with the use of Bayesian statistics by comparing the likelihood of different models to reproduce the observed statistics in order to infer the most likely models. In addition to two models of the intergalactic medium, we consider contributions from the local environment of the source, assumed to be a magnetar, as well as a representative ensemble of host and intervening galaxies. Results: Assuming that the missing baryons reside in the ionized intergalactic medium, our results suggest that the redshift distribution of observed fast radio bursts peaks at $z \lesssim 0.6$. However, conclusions from different instruments regarding the intergalactic baryon content diverge and thus require additional changes to the observed distribution of host redshifts, beyond those caused by telescope selection effects.
description: 9 pages, 4 figures, accepted by MNRAS
Proving Newtonian Arbiters Correct, almost surely
Creators: name: Mitchell, Ian M.
Publisher: name: University of British Columbia
Year: 2009

description: An arbiter is a circuit that grants its clients mutually exclusive access to a shared resource. The ideal arbiter cannot be built—either requests must occur synchronously, mutual exclusion is not guaranteed, or the arbiter may become hung indefinitely and fail to make a decision. This thesis explores arbiters whose failure mode is the latter; they are not live. Two specific arbiters are investigated: a "toy" arbiter, whose model was chosen for its .tractability; and Seitz's nMOS interlock, which was chosen as an example of a widely used and studied design. Both arbiters are modeled by nonlinear continuous dynamic systems, and both models are Newtonian: given an initial set of system states, the future image of that set has exactly the same dimension. The toy is shown to be almost surely live—with probability 1, the arbiter eventually, grants some pending request—while still satisfying all the other properties of an ideal arbiter. The analysis is more general than previously published results in that the inputs of the arbiter may vary while the arbiter is metastable, and conditions are given that ensure liveness even in the presence of such variations. The verification is accomplished by proof that the set of states forever trapped in the metastable region of the toy is lower dimensional than the state space of the toy as a whole. Parallels between the toy and the interlock can then be drawn.
title: Journey of the Atlantic Mackerel into Icelandic waters: Can genetics tell us about its origin?
Creators: name: Pampoulie, Christophe
name: Óskarsson, Guðmundur
name: Ólafsdóttir, Guðbjörg
name: Skírnisdóttir, Sigurlaug
name: Ólafsson, Kristinn
name: Jacobsen, Jan Arge
name: Joensen, Hóraldur
name: Siegstad, Helle
name: Olsen, Anfinn
name: Sigurðsson, Sindri
name: Guðmundsson, Páll
name: Grégoire, Francois
name: Curti, Kiersten
name: Dahle, Geir
name: Slotte, Aril
name: Helyar, Sarah
name: Daníelsdóttir, Anna Kristín
Publisher: name: ASC 2013 - Theme session N
Year: 2024
Subjects: Fisheries and aquaculture
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Global climate change has been recognized as one of the most important threats to biodiversity in the future, and mounting evidence shows that a variety of species are already responding to these changes. Modern range shifts have been recently documented in the marine environment; both observations and theory suggest that marine fish species respond to global warming by either shifting their latitudinal or their depth range, or by expanding their distribution. In recent years, the Atlantic mackerel, Scomber scombus, has invaded the Icelandic waters during its feeding migration, and has reached latitudes as high as Spitsbergen. Although there are biological indications for a European origin, fish in Icelandic waters have been suggested to be a mixture of both North American and European fish. One of the current hypotheses is that the North American mackerel stock has also started to migrate further north for feeding, following warm currents in the same way as the European mackerel. We collected samples from both regions from 2010-2012 and genotyped individuals with 15 microsatellite loci to assess the origin of the Atlantic mackerel in Icelandic waters. Here we present results of the microsatellite loci on the possible origin of mackerel in Icelandic waters.
Thickness-dependent quantum transport of Weyl fermions in ultra-high-quality SrRuO3 films
Creators: name: Kaneta-Takada, Shingo
name: Wakabayashi, Yuki K.
name: Krockenberger, Yoshiharu
name: Ohya, Shinobu
name: Tanaka, Masaaki
name: Taniyasu, Yoshitaka
name: Yamamoto, Hideki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The recent observation of Weyl fermions in the itinerant 4d ferromagnetic perovskite SrRuO3 points to this material being a good platform for exploring novel physics related to a pair of Weyl nodes in epitaxial heterostructures. In this letter, we report the thickness-dependent magnetotransport properties of ultra-high-quality epitaxial SrRuO3 films grown under optimized conditions on SrTiO3 substrates. Signatures of Weyl fermion transport, i.e., unsaturated linear positive magnetoresistance accompanied by a quantum oscillation having a π Berry phase, were observed in films with thicknesses as small as 10 nm. Residual resistivity increased with decreasing film thickness, indicating disorder near the interface between SrRuO3 and the SrTiO3 substrate. Since this disorder affects the magnetic and electrical properties of the films, the Curie temperature decreases and the coercive field increases with decreasing thickness. Thickness-dependent magnetotransport measurements revealed that the threshold residual resistivity ratio (RRR) to observe Weyl fermion transport is 21. These results provide guidelines for realizing quantum transport of Weyl fermions in SrRuO3 near heterointerfaces.
Noncommutative Geometry: Fuzzy Spaces, the Groenewold-Moyal Plane
Creators: name: Balachandran, Aiyalam P.
name: Qureshi, Babar Ahmed
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this talk, we review the basics concepts of fuzzy physics and quantum field theory on the Groenwald-Moyal Plane as examples of noncommutative spaces in physics. We introduce the basic ideas, and discuss some important results in these fields. In the end we outline some recent developments in the field.
description: This is a contribution to the Proc. of the O'Raifeartaigh Symposium on Non-Perturbative and Symmetry Methods in Field Theory (June 2006, Budapest, Hungary), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
ERICC Working Paper_Data system mapping of cox’s bazar education for Rohingya refugees and host community
Creators: name: ERICC Consortium
name: Hasan, Md Galib
name: Haque, Ashraf
name: Abdein, Mohosin
name: Saha, Proma
name: Dow, Jeffrey
name: Zaw, Htet Thiha
name: Diazgranados Ferrans, Silvia
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy
classificationCode: 390407
subject: Inclusive education

description: This working paper highlights data's crucial role in shaping education policies in humanitarian settings such as Cox's Bazar, Bangladesh. In Cox's Bazar, the Education Sector coordinates efforts across the various agencies that serve both Rohingya refugees and the host community, but the lack of adequate data hinders policy makers in their decision-making. Current research and understanding of this context often lacks a thorough evaluation of education data systems in humanitarian settings, which are often characterized by fragmented and inconsistent data across different actors in the Education Sector, and this requires closer examination. We used semi-structured interviews with 17 data managers from NGOs, international NGOs, and UN bodies to map data systems, identifying education data gaps in Cox's Bazar. Agencies in Cox's Bazar gather learners, teachers and education materials, provide information, and share aggregated information, yet data gaps exist in teacher and student assessments, learning outcomes, dropout tracking, and social-emotional learning. A lack of data-sharing policies leads to intervention duplication, while government data on education is collected by the Bangladesh Bureau of Educational Information and Statistics (BANBEIS) but not publicly shared. The findings highlight the necessity for standardized data collection and data-sharing policies to improve collaboration and decision-making within Cox's Bazar's education sector.
Lithium depletion and angular momentum transport in solar-type stars
Creators: name: Dumont, T.
name: Palacios, A.
name: Charbonnel, C.
name: Richard, O.
name: Amard, L.
name: Augustson, K.
name: Mathis, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Transport processes occurring in the radiative interior of solar-type stars are evidenced by the surface variation of light elements, in particular Li, and the evolution of their rotation rates. For the Sun, inversions of helioseismic data indicate that the radial profile of angular velocity in its radiative zone is nearly uniform, which implies the existence of angular momentum transport mechanisms. While there are many independent transport models for angular momentum and chemical species, there is a lack of self-consistent theories that permit stellar evolution models to simultaneously match the present-day observations of solar lithium abundances and radial rotation profiles. We explore how additional transport processes can improve the agreement between evolutionary models of rotating stars and observations. We constrain the resulting models by simultaneously using the evolution of the surface rotation rate and Li abundance in the solar-type stars of open clusters, and the solar surface and internal rotation profile as inverted from helioseismology. We show the relevance of penetrative convection for the depletion of Li. The rotational dependence of the depth of penetrative convection yields an anti-correlation between the initial rotation rate and Li depletion in our models of solar-type stars that is in agreement with the observed trend. Simultaneously, the addition of an ad hoc vertical viscosity leads to efficient transport of angular momentum between the core and the envelope. We also self-consistently compute for the first time the thickness of the tachocline and find that it is compatible with helioseismic estimations. However, the main sequence depletion of Li in solar-type stars is only reproduced when adding a parametric turbulent mixing below the convective envelope. The need for additional transport processes in stellar evolution models is confirmed.
description: 18 pages, 9 figures, accepted in A&A
Spontaneous emission dynamics of $Eu^{ 3+}$ ions coupled to hyperbolic metamaterials
Creators: name: López-Morales, Gabriel I.
name: Li, Mingxing
name: Yadav, Ravindra K.
name: Kalluru, Harshavardhan R.
name: Basu, Jaydeep K.
name: Meriles, Carlos A.
name: Menon, Vinod M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Sub-wavelength nanostructured systems with tunable electromagnetic properties, such as hyperbolic metamaterials (HMMs), provide a useful platform to tailor spontaneous emission processes. Here, we investigate a system comprising $Eu^{ 3+}(NO_{3})_{3}6H_{2}O$ nanocrystals on an HMM structure featuring a hexagonal array of Ag-nanowires in a porous $Al_{2}O_{3}$ matrix. The HMM-coupled $Eu^{ 3+}$ ions exhibit up to a 2.4-fold increase of their decay rate, accompanied by an enhancement of the emission rate of the $^{ 5}D_{0}\rightarrow$ $^{ 7}F_{2}$ transition. Using finite-difference time-domain modeling, we corroborate these observations with the increase in the photonic density of states seen by the $Eu^{ 3+}$ ions in the proximity of the HMM. Our results indicate HMMs can serve as a valuable tool to control the emission from weak transitions, and hence hint at a route towards more practical applications of rare-earth ions in nanoscale optoelectronics and quantum devices.
The Ursa Major Association of Galaxies. VI: A relative dearth of gas-rich dwarf galaxies
Creators: name: Busekool, E.
name: Verheijen, M. A. W.
name: van der Hulst, J. M.
name: Tully, R. B.
name: Trentham, N.
name: Zwaan, M. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We determined the HI mass function of galaxies in the Ursa Major association of galaxies using a blind VLA-D array survey, consisting of 54 pointings in a cross pattern, covering the centre as well as the outskirts of the Ursa Major volume. The calculated HI mass function has best-fitting Schechter parameters θ^* = 0.19+/-0.11 Mpc^{-3}, log(M^*_{HI}/M_{\odot}) = 9.8+/-0.8 and α = -0.92+/-0.16. The high-mass end is determined by a complementary, targeted WSRT survey, the low-mass end is determined by the blind VLA survey. The slope is significantly shallower than the slopes of the HIPASS (α = -1.37+/-0.03+/-0.05) and ALFALFA (α = -1.33+/-0.02) HI mass functions, which are measured over much larger volumes and cover a wider range of cosmic environments: There is a relative lack of low HI mass galaxies in the Ursa Major region. This difference in the slope strongly hints at an environmental dependence of the HI mass function slope.
description: 19 pages, 15 figures. Accepted for publication in MNRAS
ERICC Working Paper _ Political economy and (in)coherence of the education system in Cox’s Bazar, Bangladesh
Creators: name: ERICC Consortium
name: Homonchuk, Olha
name: Sharp, Samuel
name: Nicolai, Susan
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy
classificationCode: 390407
subject: Inclusive education

description: This paper explores the underlying causes of dissonance between official commitments and the day-to-day delivery of education by different actors in Cox’s Bazar, Bangladesh. The paper sets its analysis against a conceptual framework that considers education system coherence and examines the alignment of the system along both horizontal and vertical axes. Through this framework, the research finds that while there is a shared commitment and horizontal coordination among humanitarian, development, and government actors in alleviating the pressure on the host community, the humanitarian-development nexus has gradually faded from Joint Response Plans to the Rohingya Crisis. Looking along the vertical - national, state, and local - tiers of action, it appears that vertical incoherence persists in the humanitarian education sector. To some extent, this incoherence stems from insufficient inclusion of the Rohingya community and local NGOs in crucial decision-making processes. Within this context of education system incoherence, one can see that current policy focus on the rollout of the Myanmar curriculum, while broadly welcomed, is poised to fall short in improving learning outcomes due to misalignment between funding cycles, data and monitoring systems, and provider-level incentives. The analysis presented in this paper points towards several key recommendations:Transition from a reactive financing model to predictable and flexible humanitarian funding;Involve the Rohingya community not only in service delivery coordination but also in decisions regarding overarching education strategies and the allocation of financial resources;Allocate sufficient resources to address the scarcity of Myanmar language skills among Education Sector staff through local problem-solving mechanisms.Establish secure data-sharing platforms for enhanced usability of existing data; andCreate financial incentives for providers to track and evaluate learning outcomes, beyond student enrolment.
A Research Object-based Toolkit to Support the Earth Science Research Lifecycle - snapshot
Creators: name: Gosiaw
Publisher: name: Zenodo
Year: 2021

description: Data-intensive science disciplines, like Earth Science, are increasingly producing and consuming a variety of digital resources during the course of a scientific investigation. Instead of having these resources in isolated repositories, scientists are seeking ways for managing and making these resources available from a single place, and at the same time they are also increasingly interested in the adoption of FAIR principles to enhance the visibility and reusability of scientific results. This has called for new methods to improve the access and communication of results. Research Objects are a key building block towards realising this vision. They provide a structured way (a model) to describe scientific resources related to an investigation, along with the context in which they were used and the people involved. But research objects are as useful in practice as the availability of tools supporting their adoption. In this paper, we present a toolkit, tailored for Earth Sciences, comprising a set of services and applications around research objects that support scientists throughout the research lifecycle to manage, share, find and reuse scientific results, and we discuss initial insights into the community adoption.
Gravitational lensing as a probe of compact object population in the Galaxy
Creators: name: Oslowski, S.
name: Moderski, R.
name: Bulik, T.
name: Belczynski, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The population of solitary compact objects in the Galaxy is very diffcult to investigate. In this paper we analyze the possibility of using microlensing searches to detect and to analyze the properties of the solitary black holes and neutron stars. Evolution of single and binary stars is considered using the StarTrack population synthesis code. We investigate the properties of the Galactic population of compact objects numerically. We find that the compact object lensing events are concentrated in a region with the radius of $\approx 5$ degrees around the Galactic center. The distribution of masses of the lenses for the models we consider differs but only slightly from the underlying massdistribution. The expected detection rates are of the order of a few per year.
description: Submitted to Astronomy and Astrophysics
Parking planets in circumbinary discs
Creators: name: Penzlin, A. B. T.
name: Kley, W.
name: Nelson, R. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Kepler space mission discovered about a dozen planets orbiting around binary stars systems. Most of these circumbinary planets lie near their instability boundaries at about 3 to 5 binary separations. Past attempts to match these final locations through an inward migration process were only successful for the Kepler-16 system. Here, we study 10 circumbinary systems and try to match the final parking locations and orbital parameters of the planets with a disc driven migration scenario. We performed 2D locally isothermal hydrodynamical simulations of circumbinary discs with embedded planets and followed their migration evolution using different values for the disc viscosity and aspect ratio. We found that for the six systems with intermediate binary eccentricities ($0.1 \le e_{bin}\le 0.21$) the final planetary orbits matched the observations closely for a single set of disc parameters, specifically a disc viscosity of $α= 10^{-4}$, and an aspect ratio of $H/r \sim 0.04$. For these systems the planet masses were large enough to open at least a partial gap in their discs as they approach the binary, forcing the discs to become circularized and allowing for further migration towards the binary, leading to good agreement with the observed planetary orbital parameters. For systems with very small or large binary eccentricities the match was not as good because the very eccentric discs and large inner cavities in these cases prevented close-in planet migration. In test simulations with higher than observed planet masses better agreement could be found for those systems. The good agreement for 6 out of the 10 modelled systems, where the relative difference between observed and simulated final planet orbit is $\leq 10\%$, strongly supports the idea that planet migration in the disc brought the planets to their present locations.
ERICC Policy Brief _ The Politics and (incoherence) of education in Cox's Bazar, Bangladesh
Creators: name: ERICC Consortium
name: Sharp, Samuel
name: Homonchuk, Olha
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy
classificationCode: 390407
subject: Inclusive education

description: This policy brief draws from the findings of a longer Education Research in Conflict and Protracted Crisis (ERICC) working paper, Political economy and (in)coherence of the education system in Cox’s Bazar, Bangladesh, which explored the drivers and outcomes of dissonance between official intentions for cross-sectoral coordination, also referred to as the ‘humanitarian-development nexus’, and the default operations of the Education Sector. It is based on 38 key informant interviews conducted in 2022 and 2023 with stakeholders in Cox’s Bazar and a review of relevant literature. This brief summarizes the sources of education system (in)coherences in Cox’s Bazar, drawing out the links between sector operations and the key actors’ de facto incentives and capacities, and illustrates the value of understanding how these political economy drivers shape the contours of plausible reforms to improve education coherence in emergencies.
The automatic recognition of individual trees in aerial images of forests based on a synthetic tree crown image model
Creators: name: Pollock, Richard
Publisher: name: University of British Columbia
Year: 2009

description: The thesis of this work is that individual tree crowns can be automatically recognized in monocular high spatial resolution optical images of scenes containing boreal or cool temperate forests in a leaved state. The thesis was advanced by developing and testing an automatic tree crown recognition procedure that is based on a model of the image formation process at the scale of an individual tree. This model provides a means of applying specific scene and image formation knowledge to the recognition task. The procedure associates instances of a three-dimensional shape description with locations in a scene image such that the descriptions estimate the visible scene extent of tree crowns that existed at the corresponding scene locations when the image was acquired. This provides an estimate of the average horizontal diameter of the vertical projection of individual recognized tree crowns, and a basis for species classification. This work makes a contribution to the overall effort to increase the level of automation in forest type mapping. This work also introduces and demonstrates the use of a pre-defined image model to support the manual acquisition of a sample of unmodelled tree crown image properties, and the use of constraints related to the spatial relationships among multiple neighbouring candidate recognition instances to resolve image interpretation conflicts. The procedure was tested with a scene of mixed uneven-aged forests in which the trees represent a wide variety of species, size, and growing conditions. The results were assessed on the basis of ground reference data and compared to those produced by human interpreters. The scene represented a greater level of difficulty than that which has been addressed by previous attempts at automating the tree crown recognition task. The test results show that the procedure was able to largely accommodate the variation represented by the test scene, but that human interpreters were better able to accommodate irregularities in tree crown form and irradiance that were caused by tight vertical and horizontal spacing of the crowns.
title: The spawning migration of capelin (Mallotus villosus) in Icelandic waters
Creators: name: Olafsdottir, Anna Heiða
name: Rose, George A.
Publisher: name: ASC 2013 - Theme session N
Year: 2024
Subjects: Fisheries and aquaculture
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Capelin (Mallotus villosus) have adapted to the sub-arctic environment by migrating north (67–72°N) to feed during summer in deep cold waters (>500m; 1–3°C) before migrating south (63–65°N) in winter to spawn in warmer shallow waters (200m bottom depth). Further south (4.5°C) was encountered, the migration route veered inshore (
Short distances, black holes, and TeV gravity
Creators: name: Agullo, I.
name: Navarro-Salas, J.
name: Olmo, Gonzalo J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Hawking effect can be rederived in terms of two-point functions and in such a way that it makes it possible to estimate, within the conventional semiclassical theory, the contribution of ultrashort distances at $I^+$ to the Planckian spectrum. Thermality is preserved for black holes with $κl_P << 1$. However, deviations from the Planckian spectrum can be found for mini black holes in TeV gravity scenarios, even before reaching the Planck phase.
description: 4 pages. Contribution to the MG11 Meeting (Berlin, July 2006)
Η εικασία του Stanley για το βάθος ενός πολυβαθμωτού module:
Creators: name: Αγάογλου, Μακρίνα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Βάθος
Μονδύλιο
Στάνλευ
Depth
Module
Stanley

description: Σκοπός αυτής της διπλωματικής εργασίας είναι η μελέτη της εικασίας του Stanley για πολυβαθμωτά modules πάνω από πολυωνυμικούς δακτύλιους. Αρχικά δίνουμε τον ορισμό της ανάλυσης του Stanley για πολυβαθμωτά modules και του βάθους του Stanley. Παρουσιάζουμε την εικασία, η οποία θέτει το βάθος του Stanley ως το άνω όριο του βάθους πολυβαθμωτών modules. Περιγράφουμε τον Αλγόριθμο του Janet με τον οποίο μπορούμε να υπολογίσουμε την ανάλυση του Stanley στην περίπτωση των μονωνυμικών ιδεωδών. Παρουσιάζουμε τα πρώτα φιλτραρίσματα πολυβαθμωτών modules και δείχνουμε ότι κάθε τέτοιο module έχει πρώτο φιλτράρισμα και επιπλέον μία ανάλυση του Stanley. Βασισμένοι στα πρώτα φιλτραρίσματα προσδιορίζουμε ορισμένες κατηγορίες πολυβαθμωτών modules, και δείχνουμε ότι ικανοποιούν την εικασία του Stanley.
description: The aim of the present thesis is the study of Stanley's conjecture for multigraded modules over polynomial rings. First we give the definition of a Stanley decomposition of multigraded modules and of the Stanley depth. We present the conjecture which places Stanley depth as an upper bound for the depth of multigraded modules. We describe Janet's Algorithm which provides a way of computing a Stanley decomposition in the case of monomial ideals. We introduce prime filtrations of multigraded modules and show that any such modules has a prime filtration and thus a Stanley decomposition. Based on prime filtrations we identify certain categories of multigraded modules, and show that they satisfy Stanley's conjecture.
Εστία, Ραμπαγάς, Εβδομάς: Τρεις ενδεικτικές περιπτώσεις εμπλοκής του περιοδικού τύπου στην πρόσληψη του γαλλικού νατουραλισμού στην Ελλάδα:
Creators: name: Πατσά, Στέλλα
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Εστία, Εβδομάς, Ραμπαγάς
Γαλλικός νατουραλισμός
ηθογραφία
Estia, Evdomas, Rampagas
French naturalism
ethografia

description: Με αφετηρία το 1878, οπότε δημοσιεύεται το πρώτο διήγημα του Ζολά στην Εστία, έως και το 1895, έτος αναστολής κυκλοφορίας του περιοδικού, η παρούσα μεταπτυχιακή διπλωματική εργασία διερευνά το ρόλο τριών αντιπροσωπευτικών εντύπων, της Εστίας, του Ραμπαγά και της Εβδομάδος, στην διακίνηση του δεσπόζοντος την εποχή εκείνη ευρωπαικού ρεύματος, του γαλλικού νατουραλισμού. Αφετηρία της έρευνας υπήρξε η λεπτομερής αποδελτίωση των σχετικών με τον νατουραλισμό δημοσιευμάτων, τα οποία εν συνεχεία ταξινομούνται κατά κατηγορίες (τυπολογία) και αξιολογούνται ανάλογα με το περιεχόμενο, τον χρόνο και τις συνθήκες δημοσίευσής τους. Με βάση την αξιολόγηση των δημοσιευμάτων αποτιμάται τελικά ο ρόλος που διαδραμάτισαν η Εστία, ο Ραμπαγάς και η Εβδομάς ως καθοριστικός τόσο στην πρόσληψη μιας εν πολλοίς παραμορφωτικής εικόνας του γαλλικού νατουραλισμού από το ελληνικό κοινό, όσο και στη δημιουργία ευνοικού κλίματος για τη στροφή της ελληνικής λογοτεχνικής παραγωγής προς το γνωστό υβριδικό λογοτεχνικό είδος, την ηθογραφία.
description: This study investigated the participation of three distinguishing periodicals, i.e. Estia, Rampagas, Evdomas, in the reception of French naturalism in Greece, within the time period of 1878-1895. Initially, the researcher catalogued all the articles that were relevant to naturalism; apart from this, she categorized and commented on them in relation to their subject, as well as the time and the context of their publication. An important implication of the findings is that the features of naturalism received in Greece influenced, for the most part, the construction of a new literary genre, known as “ethografia”.
Evaluation of Motor Imagery-Based BCI methods in neurorehabilitation of Parkinson's Disease patients
Creators: name: Miladinović, Aleksandar
name: Ajčević, Miloš
name: Busan, Pierpaolo
name: Jarmolowska, Joanna
name: Silveri, Giulia
name: Deodato, Manuela
name: Mezzarobba, Sussana
name: Battaglini, Piero Paolo
name: Accardo, Agostino
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The study reports the performance of Parkinson's disease (PD) patients to operate Motor-Imagery based Brain-Computer Interface (MI-BCI) and compares three selected pre-processing and classification approaches. The experiment was conducted on 7 PD patients who performed a total of 14 MI-BCI sessions targeting lower extremities. EEG was recorded during the initial calibration phase of each session, and the specific BCI models were produced by using Spectrally weighted Common Spatial Patterns (SpecCSP), Source Power Comodulation (SPoC) and Filter-Bank Common Spatial Patterns (FBCSP) methods. The results showed that FBCSP outperformed SPoC in terms of accuracy, and both SPoC and SpecCSP in terms of the false-positive ratio. The study also demonstrates that PD patients were capable of operating MI-BCI, although with lower accuracy.
Possible role of 3He impurities in solid 4He
Creators: name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use a quantum lattice gas model to describe essential aspects of the motion of 4He atoms and of 3He impurities in solid 4He. This study suggests that 3He impurities bind to defects and promote 4He atoms to interstitial sites which can turn the bosonic quantum disordered crystal into a metastable supersolid. It is suggested that defects and interstitial atoms are produced during the solid 4He nucleation process where the role of 3He impurities (in addition to the cooling rate) is known to be important even at very small (1 ppm) impurity concentration. It is also proposed that such defects can form a glass phase during the 4He solid growth by rapid cooling.
description: 4 two-column Revtex pages, 4 figures. Europhysics Letters (in Press)
On the local energy decay of solutions of the Dirac equation in the non-extreme Kerr-Newman metric, I
Creators: name: Winklmeier, Monika
name: Yamada, Osanobu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q10 (Primary); 47A40, 83C57 (Secondary)

description: We investigate the local energy decay of solutions of the Dirac equation in the non-extreme Kerr-Newman metric. First, we write the Dirac equation as a Cauchy problem and define the Dirac operator. It is shown that the Dirac operator is selfadjoint in a suitable Hilbert space. With the RAGE theorem, we show that for each particle its energy located in any compact region outside of the event horizon of the Kerr-Newman black hole decays in the time mean.
Heisenberg exchange in magnetic monoxides
Creators: name: Harrison, Walter A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The superexchange intertacion in transition-metal oxides, proposed initially by Anderson in 1950, is treated using contemporary tight-binding theory and existing parameters. We find also a direct exchange for nearest-neighbor metal ions, larger by a factor of order five than the superexchange. This direct exchange arises from Vddm coupling, rather than overlap of atomic charge densities, a small overlap exchange contribution which we also estimate. For FeO and CoO there is also an important negative contribution, related to Stoner ferromagnetism, from the partially filled minority-spin band which broadens when ionic spins are aligned. The corresponding J1 and J2 parameters are calculated for MnO, FeO, CoO, and NiO. They give good accounts of the Neel and the Curie-Weiss temperatures, show appropriate trends, and give a reasonable account of their volume dependences. For MnO the predicted value for the magnetic susceptibility at the Neel temperature and the crystal distortion arising from the antiferromagnetic transition were reasonably well given. Application to CuO2 planes in the cuprates gives J=1220oK, compared to an experimental 1500oK, and for LiCrO2 gives J1=4 50oK compared to an experimental 230oK.
description: 21 pages, 1 figure, submitted to Phys. Rev. B 1/19/07. Realized J=4V^2/U applies generally, as opposed to J=2V^2/U from one-electron theory (1/28 revision)
The Barbero connection and its relation to the histories connection formalism without gauge fixing
Creators: name: Savvidou, Ntina
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a histories version of the connection formalism of general relativity. Such an approach introduces a spacetime description--a characteristic feature of the histories approach--and we discuss the extent to which the usual loop variables are compatible with a spacetime description. In particular, we discuss the definability of the Barbero connection without any gauge fixing. Although it is not the pullback of a spacetime connection onto the three-surface and it does not have a natural spacetime interpretation, this does not mean that the Barbero connection is not suitable variable for quantisation; it appears naturally in the formalism even in absence of gauge fixing. It may be employed therefore, to define loop variables similar to those employed in loop quantum gravity. However, the loop algebra would have to be augmented by the introduction of additional variables.
description: 23 pages
Where does the spin angular momentum go in laser induced demagnetisation?
Creators: name: Dewhurst, J. K.
name: Shallcross, S.
name: Elliott, P.
name: Eisebitt, S.
name: Schmising, C. v. Korff
name: Sharma, Sangeeta
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The dynamics of ultrafast demagnetisation in 3$d$ magnets is complicated by the presence of both spin ${\v S}$ and orbital ${\v L}$ angular momentum, with the microscopic mechanism by which the magnetic moment is redistributed to the lattice, and at what time scales, yet to be resolved. Employing state-of-the-art time dependent density function theory we disentangle the dynamics of these two momenta. Utilising ultra short (5~fs) pulses that separate spin-orbit (SO) and direct optical excitation time scales, we demonstrate a two-step microscopic mechanism: (i) an initial loss of ${\v L}$ due to laser excitation, followed post pulse by (ii) an increase of ${\v L}$ as ${\v S}$ transfers to ${\v L}$ during subsequent ($> 15$~fs) SO induced spin-flip demagnetisation. We also show that to see an unambiguous transfer of ${\v S}$ to ${\v L}$ a short pulse is required.
description: 5 pages 4 figures