cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Connection between Gamma-Ray Bursts and Extremely Metal-Poor Stars: Black Hole-forming Supernovae with Relativistic Jets
Creators: name: Tominaga, Nozomu
name: Maeda, Keiichi
name: Umeda, Hideyuki
name: Nomoto, Ken'ichi
name: Tanaka, Masaomi
name: Iwamoto, Nobuyuki
name: Suzuki, Tomoharu
name: Mazzali, Paolo A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Long-duration gamma-ray bursts (GRBs) are thought to be connected to luminous and energetic supernovae (SNe), called hypernovae (HNe), resulting from the black-hole (BH) forming collapse of massive stars. For recent nearby GRBs~060505 and 060614, however, the expected SNe have not been detected. The upper limits to the SN brightness are about 100 times fainter than GRB-associated HNe (GRB-HNe), corresponding to the upper limits to the ejected $^{56}$Ni masses of $M({\rm ^{56}Ni})\sim 10^{-3}M_\odot$. SNe with a small amount of $^{56}$Ni ejection are observed as faint Type II SNe. HNe and faint SNe are thought to be responsible for the formation of extremely metal-poor (EMP) stars. In this Letter, a relativistic jet-induced BH forming explosion of the 40 $M_\odot$ star is investigated and hydrodynamic and nucleosynthetic models are presented. These models can explain both GRB-HNe and GRBs without bright SNe in a unified manner. Their connection to EMP stars is also discussed. We suggest that GRBs without bright SNe are likely to synthesize $\Mni\sim 10^{-4}$ to $10^{-3}M_\odot$ or $\sim 10^{-6}M_\odot$.
description: 7 pages, 3 figures. Accepted for publication in the Astrophysical Journal Letters (10 March 2007, v657n2 issue)
Ανάλυση χρηματοοικονομικών χρονοσειρών και πρόβλεψη με γραμμικά μοντέλα
Creators: name: Τσαούσης, Δημήτριος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μετοχές
Χρονοσειρές
Γραμμικά μοντέλα
Stock prices
Time series
Linear models

description: Η παρούσα διπλωματική εργασία περιέχει μια μελέτη στην ερευνητική περιοχή των Predictive Analytics. Χρησιμοποιώντας τις δυνατότητες της γλώσσας R και του Rstudio, γίνεται μια προσέγγιση της τιμής κλεισίματος μιας μετοχής ως χρονοσειρά, η οποία εξετάζεται ως προς τη στασιμότητα και ως προς τη δυνατότητα πρόβλεψης μελλοντικών δεδομένων της. Ως προς το περιεχόμενο, αρχικά παρουσιάζονται κάποιες βασικές έννοιες που συνδέονται με τις μετοχές και τις επενδύσεις, όπως είναι η αναμενόμενη απόδοση μιας επένδυσης, η πραγματική απόδοση μιας επένδυσης, ο κίνδυνος που ενέχει μια επένδυση και άλλα. Γίνεται ανάλυση της έννοιας της χρονοσειράς και των βασικότερων χαρακτηριστικών της σε θεωρητικό υπόβαθρο, όπως η στασιμότητα, η αυτοσυσχέτιση, η περιοδικότητα, η τυχαιότητα. Παρουσιάζονται, επίσης, τα γραμμικά μοντέλα AR(p), MA (q) και ARIMA (p,d,q), τα οποία δύνανται να «προσαρμοστούν» στα δεδομένα μιας στάσιμης χρονοσειράς και να παρέχουν προβλέψεις με μια σχετική ακρίβεια. Τέλος, το θεωρητικό υπόβαθρο των χρονοσειρών και των γραμμικών μοντέλων εφαρμόζεται στην πράξη σε μια μελέτη περίπτωσης. Η έρευνα αφορά τις μετοχές των εταιρειών «Intracom Holdings» και «MLS Πληροφορική», οι οποίες είναι εισηγμένες στο Χρηματιστήριο Αξιών Αθηνών. Τα δεδομένα της μελέτης αφορούν τις τιμές κλεισίματος των μετοχών για το χρονικό διάστημα 02/01/2014 – 02/01/2018 και με χρήση των γραμμικών μοντέλων ARIMA, γίνεται μια προσπάθεια πρόβλεψης των δέκα επόμενων τιμών τους στο περιβάλλον του Rstudio
description: This master thesis contains a study in Predictive Analytics research area. Using the R language and Rstudio, stock prices are analyzed as financial time series. These series are checked for their stationarity, in order to identify whether their future price can be predicted. Some key concepts, such as the expected return of investment, the actual return of investment and the risk of investment are demonstrated in the first two chapters. The definition of time series and their basic properties (stationarity, auto correlation, partial autocorrelation, trend, seasonality, etc) are presented in chapter three. The function of linear predictive models is explained in chapter four. Specifically, auto regressive models (known as AR models) and moving average models (known as MA models) are used in order to perform a forecast for the future values of time series. The combination of the models is also presented. The latter is known as autoregressive moving average model, or more simply ARIMA model. The final chapter of this thesis contains a case study. Following the Box – Jenkins procedure step by step, the stock prices of two shares of Athens Exchange are decomposed. The most appropriate ARIMA models to describe and predict the stock prices’ time series are identified using Rstudio
Staggered modules of $N=2$ superconformal minimal models
Creators: name: Raymond, Christopher
name: Ridout, David
name: Rasmussen, Jorgen
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We investigate a class of reducible yet indecomposable modules over the $N=2$ superconformal algebras. These so-called staggered modules exhibit a non-diagonalisable action of the Virasoro mode $L_{0}$. Using recent results on the coset construction of $N=2$ minimal models, we explicitly construct such modules for central charges $c = -1$ and $c = -6$. We also describe spectral-flow orbits and symmetries of the families of staggered modules which arise via the coset.
description: 25 pages, 10 figures, comments are welcome.V2 corrected typos, improved arguments in section 5.2
D1.3: 1st General Assembly Report
Creators: name: Evrard, Estérine
name: Pouliquen, Sylvie
name: Maze, Guillaume
name: Velez-Belchi, Pedro
name: Schmechtig, Catherine
name: D'Ortenzio, Fabrizio
name: Tuomi, Laura
name: Notarstefano, Giulio
name: Gourcuff, Claire
name: Berry, Alan
Publisher: name: Zenodo
Year: 2020

description: First General Assembly report
Search for W-prime boson resonances decaying to a top quark and a bottom quark
Creators: name: D0 Collaboration
name: Abazov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We search for the production of a heavy W-prime gauge boson that decays to third generation quarks in 0.9 fb-1 of ppbar collisions at sqrt{s} = 1.96 TeV, collected with the D0 detector at the Fermilab Tevatron collider. We find no significant excess in the final-state invariant mass distribution and set upper limits on the production cross section times branching fraction. For a left-handed W-prime boson with SM couplings, we set a lower mass limit of 731 GeV. For right-handed W-prime bosons, we set lower mass limits of 739 GeV if the W-prime boson decays to both leptons and quarks and 768 GeV if the W-prime boson decays only to quarks. We also set limits on the coupling of the W-prime boson to fermions as a function of its mass.
description: submitted to Phys. Rev. Letters. 7 pages, 2 figures
Fourier frequencies in affine iterated function systems
Creators: name: Dutkay, Dorin E.
name: Jorgensen, Palle E. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 28A80, 42B05, 60G42, 46C99, 44.30, 37B25, 47A10

description: We examine two questions regarding Fourier frequencies for a class of iterated function systems (IFS). These are iteration limits arising from a fixed finite families of affine and contractive mappings in $\br^d$, and the ``IFS'' refers to such a finite system of transformations, or functions. The iteration limits are pairs $(X, μ)$ where $X$ is a compact subset of $\br^d$, (the support of $μ$) and the measure $μ$ is a probability measure determined uniquely by the initial IFS mappings, and a certain strong invariance axiom. The two questions we study are: (1) existence of an orthogonal Fourier basis in the Hilbert space $L^2(X,μ)$; and (2) the interplay between the geometry of $(X, μ)$ on the one side, and the spectral data entailed by possible Fourier bases.
description: new version, we included the suggestions of the referee
First order superconducting phase transition in chiral $p+ip$ system
Creators: name: Haugen, Håvard Homleid
name: Babaev, Egor
name: Krohg, Fredrik Nicolai
name: Sudbø, Asle
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We use large-scale Monte Carlo computations to study the phase transitions of a two-component chiral p-wave superconductor in zero external magnetic field. We find a first order phase transition from the normal state to a chiral superconducting state, due to interplay between vortices and domain walls.
Advances in structure prediction of inorganic compounds
Creators: name: Bail, Armel Le
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: There is a huge and confusing literature about inorganic crystal structure prediction. The word "prediction" is used sometimes as meaning "structure determination" since the process described needs the knowledge of the chemical composition and of the cell parameters. Some clarifications are presented here together with a new software (GRINSP) and some of its predictions.
description: 15 pages
Αποτύπωση των ψηφιδωτών στο εσωτερικό της Ροτόντας
Creators: name: Μάνταλος, Θεόφιλος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ροτόντα
Αποτύπωση ψηφιδωτών
Τρισδιάστατη αποτύπωση
Rotonda
Surveying mosaics
Threedimentional surveying

description: Η εκπόνηση της παρούσας μεταπτυχιακής εργασίας, πραγματοποιήθηκε στα πλαίσια του μεταπτυχιακού προγράμματος σπουδών "Γεωπληροφορικής" με κατεύθυνση "Τοπογραφικές Εφαρμογές Υψηλής Ακρίβειας", του Τμήματος Αγρονόμων και Τοπογράφων Μηχανικών, του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης και έχει ως θέμα την αποτύπωση των ψηφιδωτών που βρίσκονται στο εσωτερικό της Ροτόντας. Αντικείμενο της παρούσας εργασίας, είναι η αποτύπωση των ψηφιδωτών και η δημιουργία όψεων αυτών. Συγκεκριμένα, για να γίνει η αποτύπωση του ναού, χρησιμοποιήθηκε το όργανο FARO LASER SCAN FOCUS 3D, και με την επεξεργασία μέσω των λογισμικών SCENE 5.4 , PoinTools και Autocad, ώστε να αποδοθούν με την καλύτερη δυνατή λεπτομέρεια και ανάλυση τα τελικά σχέδια. Αρχικά γίνεται εκτενής αναφορά στα γεωγραφικά και ιστορικά στοιχεία του ναού (θέση, ιστορικά στοιχεία, εξέλιξη του κτίσμαος στο χρόνο κ.α.). Έπειτα περιγράφεται η διαδικασία των μετρήσεων, και της επεξεργασίας των δεδομένων μέσω των προγραμμάτων SCENE 5.4 , PoinTools και Autocad. Τέλος, επισυνάπτονται οι εικόνες των όψεων
description: This diploma thesis was part of the Geoinformatics postgraduate curriculum of the Department of Rural and Surveying Engineering of Aristotle University of Thessaloniki, for a Masters degree in High accuracy surveying applications of Topography, entitled ''Threedimentional Surveying of the mosaics of Rotonda” . The object of this thesis is the designing of the views of the mosaics. In order to survey the inside if the building the use of the FARO LASER SCAN FOCUS 3D was necessary. The programs that were utilized during this thesis were SCENE 5.4 , PoinTools and Autocad ensuring that the resulting designs had the best possible detail and analysis. Firstly, we encounter a reference to the geography and history of Rotonda (regional history, historical facts and alterations that occurred to the building, since being built etc). The processing of the data continues using the programs that have been fore mentioned. Finally,the views of the mosaics are included
Diversity of the Supernova - Gamma-Ray Burst Connection
Creators: name: Nomoto, K.
name: Tominaga, N.
name: Tanaka, M.
name: Maeda, K.
name: Suzuki, T.
name: Deng, J. S.
name: Mazzali, P. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The connection between the long Gamma Ray Bursts (GRBs) and Type Ic Supernovae (SNe) has revealed interesting diversity. We review the following types of the GRB-SN connection. (1) GRB-SNe: The three SNe all explode with energies much larger than those of typical SNe, thus being called Hypernovae (HNe). They are massive enough for forming black holes. (2) Non-GRB HNe/SNe: Some HNe are not associated with GRBs. (3) XRF-SN: SN 2006aj associated with X-Ray Flash 060218 is dimmer than GRB-SNe and has very weak oxygen lines. Its progenitor mass is estimated to be small enough to form a neutron star rather than a black hole. (4) Non-SN GRB: Two nearby long GRBs were not associated SNe. Such ``dark HNe'' have been predicted in this talk (i.e., just before the discoveries) in order to explain the origin of C-rich (hyper) metal-poor stars. This would be an important confirmation of the Hypernova-First Star connection. We will show our attempt to explain the diversity in a unified manner with the jet-induced explosion model.
description: 16 pages, 12 figures. To be published in the proceedings of the conference "SWIFT and GRBs: Unveiling the Relativistic Universe", Venice, June 5-9, 2006. To appear in "Il Nuovo Cimento"
Magnon Transport in the Presence of Antisymmetric Exchange in a Weak Antiferromagnet
Creators: name: Ross, A.
name: Lebrun, R.
name: Gomonay, O.
name: Sinova, J.
name: Kay, A.
name: Grave, D. A.
name: Rothschild, A.
name: Kläui, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Dzyaloshinskii-Moriya interaction (DMI) is at the heart of many modern developments in the research field of spintronics. DMI is known to generate noncollinear magnetic textures, and can take two forms in antiferromagnets: homogeneous or inter-sublattice, leading to small, canted moments and inhomogeneous or intra-sublattice, leading to formation of chiral structures. In this work, we first determine the strength of the effective field created by the DMI, using SQUID based magnetometry and transport measurements, in thin films of the antiferromagnetic iron oxide hematite, $α$-Fe$_2$O$_3$. We demonstrate that DMI additionally introduces reconfigurability in the long distance magnon transport in these films under different orientations of a magnetic field. This arises as a hysteresis centred around the easy-axis direction for an external field rotated in opposing directions whose width decreases with increasing magnetic field as the Zeeman energy competes with the effective field created by the DMI.
Charge transport in a Tomonaga-Luttinger liquid: effects of pumping and bias
Creators: name: Agarwal, Amit
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the current produced in a Tomonaga-Luttinger liquid by an applied bias and by weak, point-like impurity potentials which are oscillating in time. We use bosonization to perturbatively calculate the current up to second order in the impurity potentials. In the regime of small bias and low pumping frequency, both the DC and AC components of the current have power law dependences on the bias and pumping frequencies with an exponent 2K - 1 for spinless electrons, where K is the interaction parameter. For K < 1/2, the current becomes large for special values of the bias. For non-interacting electrons with K = 1, our results agree with those obtained using Floquet scattering theory for Dirac fermions. We also discuss the cases of extended impurities and of spin-1/2 electrons.
description: 9 pages including 2 figures; this is the published version
Fault-tolerant quantum repeater with atomic ensembles and linear optics
Creators: name: Chen, Zeng-Bing
name: Zhao, Bo
name: Chen, Yu-Ao
name: Schmiedmayer, Joerg
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a detailed analysis of a new robust quantum repeater architecture building on the original DLCZ protocol [L.M. Duan \textit{et al.}, Nature (London) \textbf{414}, 413 (2001)]. The new architecture is based on two-photon Hong-Ou-Mandel-type interference which relaxes the long-distance interferometric stability requirements by about 7 orders of magnitude, from sub-wavelength for the single photon interference required by DLCZ to the coherence length of the photons, thereby removing the weakest point in the DLCZ schema. Our proposal provides an exciting possibility for robust and realistic long-distance quantum communication.
description: Comments are welcome, to appear in Phys. Rev. A, accepted version
Analogue Hawking temperature of a laser-driven plasma
Creators: name: Fiedler, C.
name: Burton, D. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present a method for exploring analogue Hawking radiation using a laser pulse propagating through an underdense plasma. The propagating fields in the Hawking effect are local perturbations of the plasma density and laser amplitude. We derive the dependence of the resulting Hawking temperature on the dimensionless amplitude of the laser and the behaviour of the spot area of the laser at the analogue event horizon. We demonstrate one possible way of obtaining the analogue Hawking temperature in terms of the plasma wavelength, and our analysis shows that for a high intensity near-IR laser the analogue Hawking temperature is less than approximately 25K for a reasonable choice of parameters.
description: 12 pages. Green OA version of an article accepted for publication by Physics Letters A
Strengthening national health research systems in Africa: lessons and insights from across the continent
Creators: name: Jones, Catherine M.
name: Ankotche, Amos
name: Canner, Emily
name: Habboubi, Fatma
name: Mamuye Hadis
name: Hedquist, Aaron
name: Juma, Pamela Atieno
name: Dineo Kebadiretse
name: Masupe, Tiny
name: Mijumbi, Rhona
name: Namuunda Mutombo
name: Ainia Anjatiana Rakotobe
name: Sobngwi-Tambekou, Joëlle
name: Welwean, Abel
name: Wouters, Olivier
name: Wenham, Clare
name: Parkhurst, Justin
Publisher: name: Wellcome Trust
Year: 2021
Subjects: Science Policy

description: Despite considerable progress in knowledge production of health sciences by African researchers over the past decade, significant investment in health sciences research (HSR) in Africa remains low. This project investigated how HSR capacity in Africa can be improved, recognising that strategies for strengthening HSR in Africa require a broad knowledge base, informed by diverse experiences and lessons from across the continent. This report provides detailed analyses on the measurement of HSR and development of national health research systems while showing systemic features that can lead to improvements at a country level. The findings and recommendations underscore the importance of centring HSR capacity strengthening and investment in Africa on national ownership of health research systems.
This version corrects an error within the DOI included in the recommended citation format within Final Report. There are no changes to Appendix 1, within Appendix 2 an error within a table has been corrected.
Ongoing Star Formation in the BL Lacertae object PKS 2005-489
Creators: name: Bressan, A.
name: Falomo, R.
name: Valdes, J. R.
name: Rampazzo, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present VLT long slit optical spectroscopy of the luminous BL Lacertae object PKS 2005-489. The high signal-to-noise ratio and the good spatial resolution of the data allow us to detect the signatures of ongoing star formation in an extended rotating ring, at ~4 kpc from the nucleus. We find that the ring is almost perpendicular to the radio axis and its total star formation rate is ~1 MSol/yr. We briefly discuss the concomitant presence of recent star formation and nuclear activity.
description: Accepted for publication by ApJL
Fast Graph Learning with Unique Optimal Solutions
Creators: name: Abu-El-Haija, Sami
name: Crespi, Valentino
name: Steeg, Greg Ver
name: Galstyan, Aram
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Mathematical Software (cs.MS)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: We consider two popular Graph Representation Learning (GRL) methods: message passing for node classification and network embedding for link prediction. For each, we pick a popular model that we: (i) linearize and (ii) and switch its training objective to Frobenius norm error minimization. These simplifications can cast the training into finding the optimal parameters in closed-form. We program in TensorFlow a functional form of Truncated Singular Value Decomposition (SVD), such that, we could decompose a dense matrix $\mathbf{M}$, without explicitly computing $\mathbf{M}$. We achieve competitive performance on popular GRL tasks while providing orders of magnitude speedup. We open-source our code at http://github.com/samihaija/tf-fsvd
COMPETENZA DIGITALE E GLOTTOTECNOLOGIE PER L’INSEGNANTE DI ITALIANO L2/LS
Creators: name: Santalucia, Diego
Publisher: name: Italiano LinguaDue
Year: 2015

description: L’articolo, prendendo spunto da recenti progetti che spingono per un utilizzo sempre più esteso di tablet e strumenti digitali in classe, fa riferimento alla Raccomandazione del Parlamento Europeo e del Consiglio dell’Unione Europea (2006) per discutere alcuni degli elementi rappresentativi della “competenza digitale” che la Raccomandazione delinea. Alla luce di questi elementi si sviluppano alcune indicazioni sull’uso ragionato dei motori di ricerca e di alcune risorse offerte dalla rete, come Google Docs e Google Drive.
Seguono una breve illustrazione di Edmodo, una piattaforma didattica social, e alcune indicazioni sull’utilizzo degli smartphone per l’accesso a risorse utili e semplici da condividere in classe. Sono tracciate alcune linee guida sulla gestione di risorse già accessibili in rete e che sono, quindi, a disposizione di quegli insegnanti di Italiano L2/LS che vogliano utilizzare sistemi di condivisione online a sostegno della didattica in presenza.

Digital competence and digital language teaching for Italian L2/FL teachers

The article, inspired by recent projects that push for an ever-wider use of tablets and digital tools in the classroom, refers to the Recommendation of the European Parliament and of the Council of the European Union (2006) discusses some of the representative elements of “digital competence” that the Recommendation outlines. In light of these elements, some guidelines on the use of search engines and some resources offered by the network, such as Google Docs and Google Drive, are offered.
This is followed by a brief description of Edmodo, a social learning platform, and information on the use of smartphones to access helpful resources that are easy to share in class. Finally, some guidelines on the management of resources already available on the Internet for Italian L2/FL teachers who want to use online sharing systems to support of frontal lessons are given.
description: Italiano LinguaDue, Vol 7, No 1 (2015)
Impact of right-handed interactions on the propagation of Dirac and Majorana neutrinos in matter
Creators: name: del Aguila, F.
name: Syska, J.
name: Zralek, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Dirac and Majorana neutrinos can be distinguished in relativistic neutrino oscillations if new right-handed interactions exist, due to their different propagation in matter. We review how these new interactions affect neutrino oscillation experiments and discuss the size of this eventually observable effect for different oscillation channels, baselines and neutrino energies.
description: 26 pages, 5 figures
Strengthening national health research systems in Africa: lessons and insights from across the continent
Creators: name: Jones, Catherine M.
name: Ankotche, Amos
name: Canner, Emily
name: Habboubi, Fatma
name: Mamuye Hadis
name: Hedquist, Aaron
name: Juma, Pamela Atieno
name: Dineo Kebadiretse
name: Masupe, Tiny
name: Mijumbi, Rhona
name: Namuunda Mutombo
name: Ainia Anjatiana Rakotobe
name: Sobngwi-Tambekou, Joëlle
name: Welwean, Abel
name: Wouters, Olivier
name: Wenham, Clare
name: Parkhurst, Justin
Publisher: name: Wellcome Trust
Year: 2021
Subjects: Science Policy

description: Despite considerable progress in knowledge production of health sciences by African researchers over the past decade, significant investment in health sciences research (HSR) in Africa remains low. This project investigated how HSR capacity in Africa can be improved, recognising that strategies for strengthening HSR in Africa require a broad knowledge base, informed by diverse experiences and lessons from across the continent. This report provides detailed analyses on the measurement of HSR and development of national health research systems while showing systemic features that can lead to improvements at a country level. The findings and recommendations underscore the importance of centring HSR capacity strengthening and investment in Africa on national ownership of health research systems.
Thermopower of CexR1-xB6 (R=La, Pr and Nd)
Creators: name: Kim, M. S.
name: Nakai, Y.
name: Tou, H.
name: Sera, M.
name: Iga, F.
name: Takabatake, T.
name: Kunii, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The thermopower, S, of CexR1-xB6 (R=La, Pr, Nd) was investigated. S with a positive sign shows a typical behavior observed in the Ce Kondo system, an increase with decreasing temperature at high temperatures and a maximum at low temperatures. The S values of all the systems at high temperatures are roughly linearly dependent on the Ce concentration, indicating the conservation of the single-impurity character of the Kondo effect in a wide x range. However, the maximum value of S, S_max, and the temperature, T_max, at which S_max is observed exhibit different x dependences between CexLa1-xB6 and CexR1-xB6 (R=Pr, Nd). In CexLa1-xB6, T_max, which is ~8 K in CeB6, decreases with decreasing x and converges to ~1 K in a very dilute alloy and S_max shows an increase below x ~ 0.1 after decreasing with decreasing x. In CexR1-xB6 (R=Pr, Nd), T_max shows a weak x dependence but S_max shows a roughly linear decrease in x. These results are discussed from the standpoint of the chemical pressure effect and the Ce-Ce interaction. S in the long-range ordered phase shows very different behavior between CexPr1-xB6 and CexNd1-xB6.
description: PDF file, 7 pages with 9 figures, accepted for publication
Form-factor-independent test of lepton universality in semileptonic heavy meson and baryon decays
Creators: name: Groote, Stefan
name: Ivanov, Mikhail A.
name: Körner, Jürgen G.
name: Lyubovitskij, Valery E.
name: Santorelli, Pietro
name: Tran, Chien-Thang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In the semileptonic decays of heavy mesons and baryons the lepton-mass dependence factors out in the quadratic $\cos^2θ$ coefficient of the differential $\cosθ$ distribution. We call the corresponding normalized coefficient the convexity parameter. This observation opens the path to a test of lepton universality in semileptonic heavy meson and baryon decays that is independent of form-factor effects. By projecting out the quadratic rate coefficient, dividing out the lepton-mass-dependent factor and restricting the phase space integration to the $τ$ lepton phase space, one can define optimized partial rates which, in the Standard Model, are the same for all three $(e,μ,τ)$ modes in a given semileptonic decay process. We discuss how the identity is spoiled by New Physics effects. We discuss semileptonic heavy meson decays such as $\bar{B}^0 \to D^{(\ast)+} \ell^- \barν_\ell$ and $B_c^- \to J/ψ(η_c)\ell^- \barν_\ell$, and semileptonic heavy baryon decays such as $Λ_b \to Λ_c \ell^- \barν_\ell$ for each $\ell=e,μ,τ$.
description: 14 pages, 4 figures, 3 tables. Some discussion and references added. Will be published in PRD
D1.2: Data Management Plan
Creators: name: Pouliquen, Sylvie
name: Evrard, Estérine
name: Maze, Guillaume
name: Velez-Belchi, Pedro
name: Tuomi, Laura
name: Notarstefano, Giulio
name: Gourcuff, Claire
name: O'Conchubhair, Diarmuid
Publisher: name: Zenodo
Year: 2019

description: Data Management Plan document
Traversable wormhole geometries in $f(Q)$ gravity
Creators: name: Hassan, Zinnat
name: Mandal, Sanjay
name: Sahoo, P. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The current interests in the universe motivate us to go beyond Einstein's General theory of relativity. One of the interesting proposals comes from a new class of teleparallel gravity named symmetric teleparallel gravity, i.e., $f(Q)$ gravity, where the non-metricity term $Q$ is accountable for fundamental interaction. These alternative modified theories of gravity's vital role are to deal with the recent interests and to present a realistic cosmological model. This manuscript's main objective is to study the traversable wormhole geometries in $f(Q)$ gravity. We construct the wormhole geometries for three cases: (i) by assuming a relation between the radial and lateral pressure, (ii) considering phantom energy equation of state (EoS), and (iii) for a specific shape function in the fundamental interaction of gravity (i.e. for linear form of $f(Q)$). Besides, we discuss two wormhole geometries for a general case of $f(Q)$ with two specific shape functions. Then, we discuss the viability of shape functions and the stability analysis of the wormhole solutions for each case. We have found that the null energy condition (NEC) violates each wormhole model which concluded that our outcomes are realistic and stable. Finally, we discuss the embedding diagrams and volume integral quantifier to have a complete view of wormhole geometries.
description: Revised version submitted to Progress of Physics
Teacher-student learning for a binary perceptron with quantum fluctuations
Creators: name: Arai, Shunta
name: Ohzeki, Masayuki
name: Tanaka, Kazuyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analysed the generalisation performance of a binary perceptron with quantum fluctuations using the replica method. An exponential number of local minima dominate the energy landscape of the binary perceptron. Local search algorithms often fail to identify the ground state of a binary perceptron. In this study, we considered the teacher-student learning method and computed the generalisation error of a binary perceptron with quantum fluctuations. Due to the quantum fluctuations, we can efficiently find robust solutions that have better generalisation performance than the classical model. We validated our theoretical results through quantum Monte Carlo simulations. We adopted the replica symmetry (RS) ansatz assumption and static approximation. The RS solutions are consistent with our simulation results, except for the relatively low strength of the transverse field and high pattern ratio. These deviations are caused by the violation of ergodicity and static approximation. After accounting for the deviation between the RS solutions and numerical results, the enhancement of generalisation performance with quantum fluctuations holds.
description: 12pages,5figures
Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The results of a search for direct pair production of top squarks and for dark matter in events with two opposite-charge leptons (electrons or muons), jets and missing transverse momentum are reported, using 139 fb$^{-1}$ of integrated luminosity from proton-proton collisions at $\sqrt{s} = 13$ TeV, collected by the ATLAS detector at the Large Hadron Collider during Run 2 (2015-2018). This search considers the pair production of top squarks and is sensitive across a wide range of mass differences between the top squark and the lightest neutralino. Additionally, spin-0 mediator dark-matter models are considered, in which the mediator is produced in association with a pair of top quarks. The mediator subsequently decays to a pair of dark-matter particles. No significant excess of events is observed above the Standard Model background, and limits are set at 95% confidence level. The results exclude top squark masses up to about 1 TeV, and masses of the lightest neutralino up to about 500 GeV. Limits on dark-matter production are set for scalar (pseudoscalar) mediator masses up to about 250 (300) GeV.
description: 65 pages in total, author list starting page 49, 15 figures, 19 tables, published in JHEP. All figures, including auxiliary figures, are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-08/
139 GHz UV phase-locked Raman laser system for thermometry and sideband cooling of $^9$Be$^+$ ions in a Penning trap
Creators: name: Mielke, Johannes
name: Pick, Julian
name: Coenders, Julia A.
name: Meiners, Teresa
name: Niemann, Malte
name: Cornejo, Juan M.
name: Ulmer, Stefan
name: Ospelkaus, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate phase locking of two ultraviolet laser sources by modulating a fundamental infrared laser with 4th-order sidebands using an electro-optic modulator and phase locking of one sideband to a second fundamental infrared laser. Subsequent sum frequency generation and second harmonic generation successfully translates the frequency offset to the ultraviolet domain. The phase lock at 139 GHz is confirmed through stimulated Raman transitions for thermometry of $^9$Be$^+$ ions confined in a cryogenic Penning trap. This technique might be used for sideband cooling of single $^9$Be$^+$ ions as well as sympathetic cooling schemes and quantum logic based measurements in Penning traps in the future.
description: 7 figures, accepted for publication in J. Phys. B
A Monte Carlo approach to study neutron and fragment emission in heavy-ion reactions
Creators: name: Garzelli, M. V.
name: Sala, P. R.
name: Ballarini, F.
name: Battistoni, G.
name: Cerutti, F.
name: Ferrari, A.
name: Gadioli, E.
name: Ottolenghi, A.
name: Pinsky, L. S.
name: Ranft, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Quantum Molecular Dynamics models (QMD) are Monte Carlo approaches targeted at the description of nucleon-ion and ion-ion collisions. We have developed a QMD code, which has been used for the simulation of the fast stage of ion-ion collisions, considering a wide range of system masses and system mass asymmetries. The slow stage of the collisions has been described by statistical methods. The combination of both stages leads to final distributions of particles and fragments, which have been compared to experimental data available in literature. A few results of these comparisons, concerning neutron double-differential production cross-sections for C, Ne and Ar ions impinging on C, Cu and Pb targets at 290 - 400 MeV/A bombarding energies and fragment isotopic distributions from Xe + Al at 790 MeV/A, are shown in this paper.
description: 12 pages, 3 figures, submitted for publication in Adv. Space Res
Quasifermion spectrum at finite temperature from coupled Schwinger-Dyson equations for a fermion-boson system
Creators: name: Harada, Masayasu
name: Nemoto, Yukio
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We nonperturbatively investigate a fermion spectrum at finite temperature in a chiral invariant linear sigma model. Coupled Schwinger-Dyson equations for fermion and boson are developed in the real time formalism and solved numerically. From the coupling of a massless fermion with a massive boson, the fermion spectrum shows a three-peak structure at some temperatures even for the strong coupling region. This means that the three-peak structure which was originally found in the one-loop calculation is stable against higher order corrections even in the strong coupling region.
description: 10 pages, 10 figures, minor changes on discussion on renormalization, typos corrected, version to appear in Phys. Rev. D
Fixation mechanism of ammoniacal copper wood preservatives
Creators: name: Xie, Changshi
Publisher: name: University of British Columbia
Year: 2009

description: This thesis describes the first comprehensive study of the chemistry of ammoniacal copper based wood preservatives, including the fixation of copper and nitrogen in treated wood; and the identification of the cause of the black color in treated Douglas-fir heartwood. The effects of enhanced nitrogen content in ammoniacal copper solution treated wood on the decay by three rotting fungi were investigated. Taxifolin, a Douglas-fir heartwood extractive was isolated and identified using ultraviolet (UV), infrared (IR), nuclear magnetic resonance (NMR) and mass spectrometry (MS). It was confirmed that taxifolin reacted with ammoniacal copper solutions to form a black copper-nitrogen-taxifolin complex. Nitrogen fixation in ammonium hydroxide treated wood was studied through the reaction of ammonium hydroxide solution with wood and its components. It was found that carbonyl and carboxylic groups in lignin and hemicelluloses can react with ammonia to fix nitrogen in wood. The fixation mechanism of copper and nitrogen in ammoniacal copper treated wood was studied through the reaction of vanillin, a lignin mode l compound, with an ammoniacal copper solution. The green copper complex formed was extensively studied using infrared (IR), electron spin resonance (ESR) elemental analysis an d X-ray single crystallography an d identified to be a vanillin-copper ammonia complex. An X-ray structural analysis of a single crystal of the complex enabled the structure to be known. In the complex both the methoxy and phenolic oxygen atoms of guaiacyl units were coordinated to the copper, together with nitrogen from ammonia forming a six coordinated complex. This was first determination of a crystal structure of copper-lignin model complex which may describe important bond formations occurring during the fixation of copper and nitrogen from ammoniacal copper wood preservatives. The effect of enhanced nitrogen in ammoniacal copper treated wood on the decay was studied. Wood treated with higher concentrations of ammonium hydroxide solution showed an increased decay resistance to both P. placenta and a slightly enhanced resistance to T. versicolor fungus. However, for G. trabeum the weight losses of the ammonium hydroxide treated-wood was slightly increased relative to the control. Ammoniacal copper treated wood with low copper retention showed increased decay resistance to both T. versicolor and G. trabeum. The nitrogen in the complex can not be used by fungi for their growth. However, the ammoniacal copper treated wood with low copper retention was easily attacked by P. placenta due to its ability to form insoluble copper oxalate in copper treated wood.
D1.1: Kick-Off meeting report
Creators: name: Pouliquen, Sylvie
name: Maze, Guillaume
name: Velez-Belchi, Pedro
name: Tuomi, Laura
name: Notarstefano, Giulio
name: Gourcuff, Claire
name: O' Conchubhair, Diarmuid
Publisher: name: Zenodo
Year: 2019

description: Report of the kick-off meeting
Neutrino signal dependence on gamma-ray burst emission mechanism
Creators: name: Pitik, Tetyana
name: Tamborra, Irene
name: Petropoulou, Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Long duration gamma-ray bursts (GRBs) are among the least understood astrophysical transients powering the high-energy universe. To date, various mechanisms have been proposed to explain the observed electromagnetic GRB emission. In this work, we show that, although different jet models may be equally successful in fitting the observed electromagnetic spectral energy distributions, the neutrino production strongly depends on the adopted emission and dissipation model. To this purpose, we compute the neutrino production for a benchmark high-luminosity GRB in the internal shock model, including a dissipative photosphere as well as three emission components, in the jet model invoking internal-collision-induced magnetic reconnection and turbulence (ICMART), in the case of a magnetic jet with gradual dissipation, and in a jet with dominant proton synchrotron radiation. We find that the expected neutrino fluence can vary up to three orders of magnitude in amplitude and peak at energies ranging from $10^4$ to $10^8$ GeV. For our benchmark input parameters, none of the explored GRB models is excluded by the targeted searches carried out by the IceCube and ANTARES Collaborations. However, our work highlights the potential of high-energy neutrinos of pinpointing the underlying GRB emission mechanism and the importance of relying on different jet models for unbiased stacking searches.
description: 48 pages, including 17 figures. Discussion on the uncertainties of the jet parameters and new figures added, conclusions unchanged. Matches version accepted for publication in JCAP
A Union Bound Approximation for Rapid Performance Evaluation of Punctured Turbo Codes
Creators: name: Chatzigeorgiou, Ioannis
name: Rodrigues, Miguel R. D.
name: Wassell, Ian J.
name: Carrasco, Rolando
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we present a simple technique to approximate the performance union bound of a punctured turbo code. The bound approximation exploits only those terms of the transfer function that have a major impact on the overall performance. We revisit the structure of the constituent convolutional encoder and we develop a rapid method to calculate the most significant terms of the transfer function of a turbo encoder. We demonstrate that, for a large interleaver size, this approximation is very accurate. Furthermore, we apply our proposed method to a family of punctured turbo codes, which we call pseudo-randomly punctured codes. We conclude by emphasizing the benefits of our approach compared to those employed previously. We also highlight the advantages of pseudo-random puncturing over other puncturing schemes.
description: 6 pages, 5 figures, 1 table, Proceedings of the 41st Conference on Information Sciences and Systems, Baltimore, USA, March 14-16, 2007
Herpes simplex virus 1 envelope glycoprotein C shields glycoprotein D to protect virions from entry-blocking antibodies
Creators: name: Hull, McKenna A.
Publisher: name: Washington State University
Year: 2027
Subjects: Glycoprotein C
Glycoprotein D
HSV
Herpes

description: Like many other viruses, herpes simplex virus 1 (HSV-1) has acquired a range of immune evasive strategies that have aided in spread and persistence of the virus in human populations. During viral entry, HSV-1 glycoprotein D (gD) must interact with its cognate receptor, nectin-1, making gD essential for entry into host cells. Following nectin-1 binding, interaction between gD and the heterodimer glycoprotein H and L (gH/gL) is important to the fusion cascade. Neutralizing monoclonal antibodies (MAbs) against gD can either block receptor binding or interaction with gH/gL. Here we investigated the ability for another HSV-1 envelope protein, glycoprotein C (gC) to block anti-gD MAbs from binding and neutralizing HSV-1. When gC is deleted from the HSV-1 genome and is therefore not expressed (HSV-1 Δ gC), HSV-1 is 2- to 16-fold more sensitive to neutralization by anti-gD MAbs than the wild type rescuant virus (HSV-1 gCR). When probed under native conditions, gD on the HSV-1 ΔgC viral envelope was 2.7- to 5.6-fold more reactive with anti-gD MAbs. Receptor blocking anti-gD MAbs were more potent in their ability to block HSV-1 ΔgC from binding to nectin-1 compared to HSV-1 gCR. Additionally, nectin-1 was able to block entry of HSV-1 ΔgC into cells more robustly than HSV-1 gCR. Both HSV-1 ΔgC and gCR contain similar levels of surface glycoproteins and major capsid protein VP5, suggesting the lack of gC is responsible for any differences in antibody binding and receptor binding between the two viruses. Here, we posit that viral gC is broadly protecting both the receptor-binding and gH/gL binding domains of gD.
The Inseparability Of Shiva & Shakti - A Talk On Yuganaddhastava
Creators: name: Timalsina, Staneshwar
Publisher: name: Zenodo
Year: 2025
Subjects: yantra
Durga
sarvamnaya
Vasugupta
tantraloka
agama
Spanda
Guhyakālī
shambhava
amnaya
Shiva Sutra
tripura
Camunda
consciousness
Sadāśiva
sarvamnaya-oral-tradition-archive
shakta upāya
krama
Chandi
sthaneshwar timalsina
Tripurasundari
Divine Mother
Shaiva
Bhairava
Shiva
Kula
Kali
vedanta
saivadvaita
Mahakali
mahadeva
trika
Mālinīvijayottaratantra
Tantric philosophy
Kubjika
anava upaya
shakti
Kaula
Tripura Rahasya
Īśāna
Abhinavagupta
timalsina
Tantra
Sarvamnaya
Kashmir Shaivism
advaita vedanta
Saundaryalahari
Devi Mahatmya
vimarsha-foundation

description: Listen to Acharya Dr. Sthaneshwar Timalsina giving a talk on Yuganaddhastava from Samāvēśa - Surrendering To The Divine - A Collection Of Hymns Revealed To Acharya Dr. Sthaneshwar Timalsina.

This hymn talks about the union of Shiva and Shakti which is so complete that it is hard to identify as a union, for they are one and the same. Yet, they play the role of a couple and express love.

Acharya Dr. Sthaneshwar Timalsina is an esteemed traditionally consecrated teacher of Shaiva-Shakta Hindu Tantra. He is also the Endowed Chair of Indic Studies in New York, U.S.A. at Stony Brook University's College of Arts & Sciences in the Department of Asian & Asian-American Studies. Acharya Sthaneshwar founded Vimarsha Foundation as a modern school (gurukula) for teaching and reflecting on the ancient wisdom of r̥ṣis and siddhas. Through Vimarsha Foundation, a non-profit organization, Acharya Sthaneshwar teaches shastra and sādhanā to students of all backgrounds. The Vimarsha Foundation hosts free semester length courses on classic texts of the Tantric Tradition and offers many more free video and written teachings.

About Vimarsha Foundation
Vimarsha Foundation is a modern school (gurukula) for teaching and reflecting on the ancient wisdom of r̥ṣis and siddhas. Through Vimarsha Foundation, a non-profit organization, Acharya Sthaneshwar teaches shastra and sādhanā to students of all backgrounds. The Vimarsha Foundation hosts free semester length courses on classic texts of the Tantric Tradition and offers many more free video and written teachings. Visit our website to learn more: https://www.vimarshafoundation.org/

Original YouTube video: https://www.youtube.com/watch?v=v4-sJlZ6_Dk

This presentation is part of the Sarvāmnāya Oral Tradition Archive.
Vimarsha Foundation. (2025). The Sarvāmnāya Oral Tradition Archive [Data set]. Zenodo. https://doi.org/10.5281/zenodo.15188107