cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A multiwavelength analysis of the clumpy FIR-bright sources in M33
Creators: name: Natale, G.
name: Foyle, K.
name: Wilson, C. D.
name: Kuno, N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a multiwavelength study of a sample of far-infrared (FIR) sources detected on the Herschel broad--band maps of the nearby galaxy M33. We perform source photometry on the FIR maps as well as mid-infrared (MIR), H$α$, far-ultraviolet and integrated HI and CO line emission maps. By fitting MIR/FIR dust emission spectra, the source dust masses, temperatures and luminosities are inferred. The sources are classified based on their H$α$ morphology (substructured versus not-substructured) and on whether they have a significant CO detection ($S/N>$3$σ$). We find that the sources have dust masses in the range 10$^2$-10$^4$~M$_\odot$ and that they present significant differences in their inferred dust/star formation/gas parameters depending on their H$α$ morphology and CO detection classification. The results suggests differences in the evolutionary states or in the number of embedded HII regions between the subsamples. The source background--subtracted dust emission seems to be predominantly powered by local star formation, as indicated by a strong correlation between the dust luminosity and the dust-corrected H$α$ luminosity and the fact that the extrapolated young stellar luminosity is high enough to account for the observed dust emission. Finally, we do not find a strong correlation between the dust-corrected H$α$ luminosity and the dust mass of the sources, consistent with previous results on the breakdown of simple scaling relations at sub-kpc scales. However, the scatter in the relation is significantly reduced by correcting the H$α$ luminosity for the age of the young stellar populations in the star--forming regions.
description: Accepted for publication in MNRAS
Overview of the Human Exposome Assessment Platform (HEAP) project - powerpoint presentation
Creators: name: Coombs, Heather
name: Berger, Anouk
Publisher: name: Zenodo
Year: 2021
Subjects: exposome

description: An overview of the Human Exposome Assessment Platform (HEAP) Project. Covers the main facts about, and aims of the project, how the HEAP informatics platform will work, the different work packages that make up HEAP, the HEAP consortium partners, and the other projects in the European Human Exposome Network.
Transmission Rank Selection for Opportunistic Beamforming with Quality of Service Constraints
Creators: name: Wang, Meng
name: Samarasinghe, Tharaka
name: Evans, Jamie
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we consider a multi-cell multi-user MISO broadcast channel. The system operates according to the opportunistic beamforming framework in a multi-cell environment with variable number of transmit beams (may alternatively be referred as the transmission rank) at each base station. The maximum number of co-scheduled users in a cell is equal to its transmission rank, thus increasing it will have the effect of increasing the multiplexing gain. However, this will simultaneously increase the amount of interference in the network, which will decrease the rate of communication. This paper focuses on optimally setting the transmission rank at each base station such that a set of Quality of Service (QoS) constraints, that will ensure a guaranteed minimum rate per beam at each base station, is not violated. Expressions representing the achievable region of transmission ranks are obtained considering different network settings. The achievable transmission rank region consists of all achievable transmission rank tuples that satisfy the QoS constraints. Numerical results are also presented to provide further insights on the feasibility problem.
description: To appear in IEEE ICC 2014, Sydney, Australia
A multipurpose action for learning-teaching process: The Pigelleto's Summer School of Physics
Creators: name: Montalbano, Vera
name: Mariotti, Emilio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Since 2006, forty students from high school are selected to attend a full immersion summer school of physics in the Pigelleto Natural Reserve, on the south east side of Mount Amiata in the province of Siena. Topics are chosen so that students are involved in activities rarely pursued in high school, aspects and relationship with society are underlined and discussed. Our purpose is offering to really motivated students an opportunity of testing the scientific method, the laboratory experience in a stimulating context, by deepening an interesting and relevant topic in order to orienting them towards physics. Students are encouraged in cooperating in small groups in order to present and share the achieved results. Starting from the third edition of the school, the school became a training opportunity for younger teachers which are involved in programming and realization of selected activities. The laboratory activities with students are usually supervised by a young and an expert teacher in order to fix the correct methodology. Recently, young teachers enrolled in a master in Physics Education tested in the summer school some activity designed in their courses.
description: 10 pages, 5 figures, presented at the 10th Conference of the European Science Education Research Association (ESERA), 2-7 September 2013, Nicosia, Cyprus
Exploring the early dust-obscured phase of galaxy formation with blind mid-/far-IR spectroscopic surveys
Creators: name: Bonato, M.
name: Negrello, M.
name: Cai, Z. -Y.
name: De Zotti, G.
name: Bressan, A.
name: Lapi, A.
name: Gruppioni, C.
name: Spinoglio, L.
name: Danese, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: While continuum imaging data at far-infrared to sub-millimeter wavelengths have provided tight constraints on the population properties of dusty star forming galaxies up to high redshifts, future space missions like the Space Infra-Red Telescope for Cosmology and Astrophysics (SPICA) and ground based facilities like the Cerro Chajnantor Atacama Telescope (CCAT) will allow detailed investigations of their physical properties via their mid-/far-infrared line emission. We present updated predictions for the number counts and the redshift distributions of star forming galaxies spectroscopically detectable by these future missions. These predictions exploit a recent upgrade of evolutionary models, that include the effect of strong gravitational lensing, in the light of the most recent Herschel and South Pole Telescope data. Moreover the relations between line and continuum infrared luminosity are re-assessed, considering also differences among source populations, with the support of extensive simulations that take into account dust obscuration. The derived line luminosity functions are found to be highly sensitive to the spread of the line to continuum luminosity ratios. Estimates of the expected numbers of detections per spectral line by SPICA/SAFARI and by CCAT surveys for different integration times per field of view at fixed total observing time are presented. Comparing with the earlier estimates by Spinoglio et al. (2012) we find, in the case of SPICA/SAFARI, differences within a factor of two in most cases, but occasionally much larger. More substantial differences are found for CCAT.
description: 20 pages, 14 figures, accepted for publication in MNRAS
Numerical Simulation of Grating Couplers for Mode Multiplexed Systems
Creators: name: Wohlfeil, B.
name: Burger, S.
name: Stamatiadis, C.
name: Pomplun, J.
name: Schmidt, F.
name: Zimmermann, L.
name: Petermann, K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A numerical investigation of a two dimensional integrated fiber grating coupler capable of exciting several LP fiber modes in both TE and TM polarization is presented. Simulation results and an assessment of the numerical complexity of the 3D, fully vectorial finite element model of the device are shown.
A Comparison of Cosmological Models Using Time Delay Lenses
Creators: name: Wei, Jun-Jie
name: Wu, Xue-Feng
name: Melia, Fulvio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The use of time-delay gravitational lenses to examine the cosmological expansion introduces a new standard ruler with which to test theoretical models. The sample suitable for this kind of work now includes 12 lens systems, which have thus far been used solely for optimizing the parameters of $Λ$CDM. In this paper, we broaden the base of support for this new, important cosmic probe by using these observations to carry out a one-on-one comparison between {\it competing} models. The currently available sample indicates a likelihood of $\sim 70-80%$ that the $R_{\rm h}=ct$ Universe is the correct cosmology versus $\sim 20-30%$ for the standard model. This possibly interesting result reinforces the need to greatly expand the sample of time-delay lenses, e.g., with the successful implementation of the Dark Energy Survey, the VST ATLAS survey, and the Large Synoptic Survey Telescope. In anticipation of a greatly expanded catalog of time-delay lenses identified with these surveys, we have produced synthetic samples to estimate how large they would have to be in order to rule out either model at a $\sim 99.7%$ confidence level. We find that if the real cosmology is $Λ$CDM, a sample of $\sim 150$ time-delay lenses would be sufficient to rule out $R_{\rm h}=ct$ at this level of accuracy, while $\sim 1,000$ time-delay lenses would be required to rule out $Λ$CDM if the real Universe is instead $R_{\rm h}=ct$. This difference in required sample size reflects the greater number of free parameters available to fit the data with $Λ$CDM.
description: 26 pages, 6 figures, 1 table, accepted for publication in ApJ
Numerical Rebuilding of Plasma Wind Tunnel Experiments for Investigation of Magnetohydrodynamic Flow Interactions within the EU Project MEESST
Creators: name:  ALESSA SPERBER
name:   CHRISTIAN KORN
name:   CLEMENS F. KAISER
name:   JOHANNES W. OSWALD
name:   GEORG HERDRICH
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: RE-ENTRY
NUMERICAL SIMULATION
MAGNETOHYDRODYNAMICS (MHD)
MEESST

description: Atmospheric re-entry is a critical mission phase for crewed spaceflight and sample return missions, which requires careful study of the plasma behavior around the vehicle. This paper describes a numerical rebuilding approach for high-enthalpy plasma flows in PWT experiments with the CFD code URANUS2D. Therefore, test conditions with high enthalpies of 60 MJ kg1 and 80 MJ kg1 were characterized, corresponding to highly elliptical and hyperbolic entry trajectories, respectively. The following report presents the numerical simulation results and their subsequent comparison to the experimental values, illustrating high levels of agreement for the highly elliptical condition and highlighting the need for further examination for the hyperbolic re-entry condition.
Outer-Product Hidden Markov Model and Polyphonic MIDI Score Following
Creators: name: Nakamura, Eita
name: Nakamura, Tomohiko
name: Saito, Yasuyuki
name: Ono, Nobutaka
name: Sagayama, Shigeki
Publisher: name: arXiv
Year: 2014
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Sound (cs.SD)
subject: FOS: Computer and information sciences

description: We present a polyphonic MIDI score-following algorithm capable of following performances with arbitrary repeats and skips, based on a probabilistic model of musical performances. It is attractive in practical applications of score following to handle repeats and skips which may be made arbitrarily during performances, but the algorithms previously described in the literature cannot be applied to scores of practical length due to problems with large computational complexity. We propose a new type of hidden Markov model (HMM) as a performance model which can describe arbitrary repeats and skips including performer tendencies on distributed score positions before and after them, and derive an efficient score-following algorithm that reduces computational complexity without pruning. A theoretical discussion on how much such information on performer tendencies improves the score-following results is given. The proposed score-following algorithm also admits performance mistakes and is demonstrated to be effective in practical situations by carrying out evaluations with human performances. The proposed HMM is potentially valuable for other topics in information processing and we also provide a detailed description of inference algorithms.
description: 42 pages, 8 figures, version submitted to JNMR. To appear in Journal of New Music Research (2014)
A successful search for hidden Barbarians in the Watsonia asteroid family
Creators: name: Cellino, A.
name: Bagnulo, S.
name: Tanga, P.
name: Novakovic, B.
name: Delbo`, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Barbarians, so named after the prototype of this class (234) Barbara, are a rare class of asteroids exhibiting anomalous polarimetric properties. Their very distinctive feature is that they show negative polarization at relatively large phase-angles, where all 'normal' asteroids show positive polarization. The origin of the Barbarian phenomenon is unclear, but it seems to be correlated with the presence of anomalous abundances of spinel, a mineral usually associated with the so-called Calcium Aluminum-rich inclusions (CAIs) on meteorites. Since CAIs are samples of the oldest solid matter identified in our solar system, Barbarians are very interesting targets for investigations. Inspired by the fact that some of the few known Barbarians are members of, or very close to the dynamical family of Watsonia, we have checked whether this family is a major repository of Barbarians, in order to obtain some hints about their possible collisional origin. We have measured the linear polarization of a sample of nine asteroids which are members of the Watsonia family within the phase-angle range 17-21 DEG. We found that seven of them exhibit the peculiar Barbarian polarization signature, and we conclude that the Watsonia family is a repository of Barbarian asteroids. The new Barbarians identified in our analysis will be important to confirm the possible link between the Barbarian phenomenon and the presence of spinel on the surface.
description: Accepted by MNRAS
محرمات الطعام والشراب في القرآن الكريم وأثرها الصحي على المجتمعات الإسلامية
Creators: name: Abouzeid, Mohamed
Publisher: name: figshare
Year: 2020
Subjects: subject: Religious Studies
subject: 220402 Comparative Religious Studies
subject: FOS: Philosophy, ethics and religion
subject: 220407 Studies in Religious Traditions (excl. Eastern, Jewish, Christian and Islamic Traditions)
subject: 220405 Religion and Society
subject: 130211 Religion Curriculum and Pedagogy
subject: FOS: Educational sciences

description: نشر في مجلة جامعة أم القرى لعلوم الشريعة والدراسات الإسلامية في العدد ٧٩ الجزء ١يتناول هذا البحث محرمات الطعام والشراب الواردة في القرآن الكريم، كما يوضح كيف كان لتحريم هذه الأطعمة والأشربة الأثر الواضح في تمتُّعِ الأمة الإسلامية بأفضل أحوال الصحة البدنية والنفسية. ويهدف الباحث إلى تحديد محرمات الطعام والشراب في النص القرآني، وبيان ما توصل إليه علماء الشريعة وغيرهم من علماء الطب إلى أضرار تلك المحرمات، وتوضيح أثر تحريم هذه الأطعمة على الصحة في المجتمع الإسلامي، بالإضافة إلى تشجيع الباحثين على الاهتمام بدراسة النظم الحياتية التي أرشد إليها القرآن، وبيان قيمتها في حياتنا المعاصرة. وقد توصل الباحث إلى نتائج من أهمها: أن الأصناف المحرمة قطعا بنص القرآن الكريم حرمت لثبوت ضررها على الإنسان في بدنه أو عقله. وأن التزام الأمة الإسلامية في العموم باجتناب تلك المحرمات كان له أبلغ الأثر في نقاء المجتمعات الإسلامية من كثير من الشرور والأمراض التي تسببها. وأوصى الباحث بمزيد من الأبحاث العلمية والشرعية حول محرمات الشريعة الإسلامية واتفاق تحريمها مع العلم الثابت.Forbidden Foods and Drinks in the Holy Quran and their Health Impact on Islamic SocietiesPublished in Umm Al Qura University Journal of Sharia and Islamic Studies Issue 79 Vol 1AbstractThis research deals with the forbidden foods and drinks contained in the Holy Qur'an. The researcher aims to identify the forbidden foods and drinks in the Quranic text, and to explain the findings of the scholars of Sharia and other medical scientists to the damage of those forbidden foods and drinks, and to clarify the impact of the prohibition of these foods on health in Islamic society, in addition to encouraging researchers to pay attention to the study of life systems guided by the Quran. It starts with identifying the forbidden items in the Quranic text, and then discusses the wisdom of the prohibition of those specific types of food and drink, then discusses the interpretations of Muslim scholars seeking that wisdom, then discusses the impact of that prohibition on health in the Islamic community. The researcher concluded that the harm of forbidden items to human body and mind is a scientific fact. The commitment of the Islamic Ummah in general to avoid those forbidden foods and drinks had the greatest impact on health in Muslim societies. The researcher recommended more researches on the Sharia forbidden items compared to scientific facts.
A New Strategy for the Lattice Evaluation of the Leading Order Hadronic Contribution to $(g-2)_μ$
Creators: name: Golterman, Maarten
name: Maltman, Kim
name: Peris, Santiago
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A reliable evaluation of the integral giving the hadronic vacuum polarization contribution to the muon anomalous magnetic moment should be possible using a simple trapezoid-rule integration of lattice data for the subtracted electromagnetic current polarization function in the Euclidean momentum interval $Q^2>Q^2_{min}$, coupled with an $N$-parameter Padé or other representation of the polarization in the interval $0
description: 27 pages, 9 figures
Diamagnetic drift effects on the low-n magnetohydrodynamic modes at the high mode pedestal with plasma rotation
Creators: name: Zheng, L. J.
name: Kotschenreuther, M. T.
name: Valanju, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The diamagnetic drift effects on the low-$n$ magnetohydrodynamic instabilities at the high-mode (H-mode) pedestal are investigated in this paper with the inclusion of bootstrap current for equilibrium and rotation effects for stability, where $n$ is the toroidal mode number. The AEGIS (Adaptive EiGenfunction Independent Solutions) code [L. J. Zheng, M. T. Kotschenreuther, J. Comp. Phys. {\bf 211}, (2006)] is extended to include the diamagnetic drift effects. This can be viewed as the lowest order approximation of the finite Larmor radius effects in consideration of the pressure gradient steepness at the pedestal. The H-mode discharges at Jointed European Torus (JET) is reconstructed numerically using the VMEC code [P. Hirshman and J. C. Whitson, Phys. Fluids {\bf 26}, 3553 (1983)], with bootstrap current taken into account. Generally speaking, the diamagnetic drift effects are stabilizing. Our results show that the effectiveness of diamagnetic stabilization depends sensitively on the safe factor value ($q_s$) at the safety-factor reversal or plateau region. The diamagnetic stabilization are weaker, when $q_s$ is larger than an integer; while stronger, when $q_s$ is smaller or less larger than an integer. We also find that the diamagnetic drift effects also depend sensitively on the rotation direction. The diamagnetic stabilization in the co-rotation case is stronger than in the counter rotation case with respect to the ion diamagnetic drift direction.
description: 29 pages, 13 figures
WA-L18. Letter from David Stronach to Andrew Williamson 1971
Creators: name: Stronach, David
Publisher: name: Zenodo
Year: 2023

description: Sent from BIPS Tehran 17/10/1971; © Williamson Collection Project Notes: difficulty securing permission to continue work Transcript: <<Dear Andrew, I am sending this note down with Dick Frye. I am glad to hear that your work has gone well, without any difficulties. Well done. Naimi was not helpful when I went to see him so if nothing got through to you from me in August that is now perhaps for the best. Bit at the same I apologise for the fact that no direct […] reached you from […] […] […]. (I am sure I sent some also inviting you to Qumis but not via the post, so I am not certain how things went wrong.) When David W[hitehouse] was here I took up the question of fieldwork in the south with H.E. and he told me that it looked as if amicable solutions were still not clear, and for this reason he said that it would be best if none of us continued to do any fieldwork there once the celebrations were over. In other words, please only work in Shiraz from now on until you come up to Tehran and, as we all hope, the ‘air clears’. I shall leave for London on or about the 24th of October and will be back again sometime after mid-December. If you have time to let me know of your more immediate plans in writing here or c/o the Academy in London that would be very nice. Yours ever, David. PS. I was shown some pots at the Museum division room – after Qumis – and they said that you had said that I would collect them? I was a bit mystified>>
Effect of speckle on APSCI method and Mueller Imaging
Creators: name: Upadhyay, Debajyoti
name: Richert, Michael
name: Lacot, Eric
name: De Martino, Antonello
name: Orlik, Xavier
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The principle of the polarimetric imaging method called APSCI (Adapted Polarization State Contrast Imaging) is to maximize the polarimetric contrast between an object and its background using specific polarization states of illumination and detection. We perform here a comparative study of the APSCI method with existing Classical Mueller Imaging(CMI) associated with polar decomposition in the presence of fully and partially polarized circular Gaussian speckle. The results show a noticeable increase of the Bhattacharyya distance used as our contrast parameter for the APSCI method, especially when the object and background exhibit several polarimetric properties simultaneously.
description: 7 pages
Supplementary information from Brown marmorated stink bug overwintering aggregations are not regulated through vibrational signals during autumn dispersal
Creators: name: Bedoya, Carol L.
name: Brockerhoff, Eckehard G.
name: Hayes, Michael
name: Leskey, Tracy C.
name: Morrison, William R.
name: Rice, Kevin
name: Nelson, Ximena J.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Environmental Science
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Additional figures related to the acoustic data analysis
The log-term of the disc bundle over a homogeneous Hodge manifold
Creators: name: Loi, Andrea
name: Mossa, Roberto
name: Zuddas, Fabio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53D05, 53C55, 53D05, 53D45

description: We show the vanishing of the log-term in the Fefferman expansion of the Bergman kernel of the disk bundle over a compact simply-connected homogeneous Kaehler--Einstein manifold of classical type.
description: 20 pages
Quantum and classical criticality in a dimerized quantum antiferromagnet
Creators: name: Merchant, P.
name: Normand, B.
name: Krämer, K. W.
name: Boehm, M.
name: McMorrow, D. F.
name: Rüegg, Ch.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A quantum critical point (QCP) is a singularity in the phase diagram arising due to quantum mechanical fluctuations. The exotic properties of some of the most enigmatic physical systems, including unconventional metals and superconductors, quantum magnets, and ultracold atomic condensates, have been related to the importance of the critical quantum and thermal fluctuations near such a point. However, direct and continuous control of these fluctuations has been difficult to realize, and complete thermodynamic and spectroscopic information is required to disentangle the effects of quantum and classical physics around a QCP. Here we achieve this control in a high-pressure, high-resolution neutron scattering experiment on the quantum dimer material TlCuCl3. By measuring the magnetic excitation spectrum across the entire quantum critical phase diagram, we illustrate the similarities between quantum and thermal melting of magnetic order. We prove the critical nature of the unconventional longitudinal ("Higgs") mode of the ordered phase by damping it thermally. We demonstrate the development of two types of criticality, quantum and classical, and use their static and dynamic scaling properties to conclude that quantum and thermal fluctuations can behave largely independently near a QCP.
description: 6 pages, 4 figures. Original version, published version available from Nature Physics website
Early warning signs in social-ecological networks
Creators: name: Suweis, Samir
name: D'Odorico, Paolo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Social ecological systems are often difficult to investigate and manage because of their inherent complexity1. Small variations in external drivers can lead to abrupt changes associated with instabilities and bifurcations in the underlying dynamics2-4. Anticipating critical transitions and divergence from the present state of the system is particularly crucial to the prevention or mitigation of the effects of unwanted and irreversible changes5-10. Recent research in ecology has focused on leading indicators of regime shift in ecosystems characterized by one state variable5,7,11,12. The case of systems with several mutually interacting components, however, has remained poorly investigated13, while the connection between network stability and research on indicators for loss of resilience has been elusive14. Here we develop a theoretical framework to analyze early warning signs of instability and regime shift in social ecological networks. We provide analytical expressions for a set of precursors of instability in social ecological systems with additive noise for a variety of network structures. In particular, we show that the covariance matrix of the dynamics can effectively anticipate the emergence of instability. We also compare signals of early warning based on the dynamics of suitably selected nodes, to indicators based on the integrated behavior of the whole network. We find that the performances of these indicators are affected by the network structure and the type of interaction among nodes. These results provide new advances in multidimensional early warning analysis and offer a framework to evaluate the resilience of social ecological networks.
description: 14 pages, 4 figures. Supplementary Information available upon request
Fachinformationssystem Geophysik: Änderung der BHT-Korrekturverfahren für einfach belegte Messungen
Creators: name: Agemar, Thorsten
Publisher: name: Leibniz Institute for Applied Geophysics, Stilleweg 2, 30655 Hanover, Germany
Year: 2017
Subjects: geothermal
bottom hole temperatures
borehole
temperatures
correction

description: Zur Erstellung von Temperaturkarten und 3D-Temperaturmodellenwerden neben gestörten und ungestörten Temperaturlogs, Lagerstättentemperaturen und Fördertests auch Einzelmessungen im Bohrlochtiefsten verwendet. Diese sog. Bottom Hole Temperatures (BHT) werden in fast allen Industriebohrungen, unmittelbar nach Einstellen der Bohrarbeiten, ausgeführt und sind durch den Bohrvorgang (Spülungsumlauf) thermisch gestört. Eine Korrektur (Extrapolation) dieser BHT-Werte auf ungestörte Temperaturen ist möglich, da im Bohrlochtiefsten der störende Einfluss des Spülungsumlaufs auf das Temperaturfeld am geringsten ist. In Abhängigkeit von der Stillstandzeit nach Bohrende, der Spülungsdauer (Spülungsumlauf) und der Anzahl der für jede Tiefe zur Verfügung stehenden Temperaturwerte können unterschiedliche Extrapolationsverfahren angewendet werden (AGEMAR et al. 2012, SCHULZ SCHELLSCHMIDT 1991, SCHULZ et al. 1990, SCHULZ et al. 1992, SCHULZ WERNER 1987).
The TW Hydrae Association : trigonometric parallaxes and kinematic analysis
Creators: name: Ducourant, C.
name: Teixeira, R.
name: Galli, P. A. B.
name: Campion, J. F. Le
name: Krone-Martins, A.
name: Zuckerman, B.
name: Chauvin, G.
name: Song, I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The nearby TW Hydrae Association (TWA) is currently a benchmark for the study of formation and evolution of young low-mass stars, circumstellar disks and the imaging detection of planetary companions. For such studies, it is crucial to evaluate the distance to group members in order to access their physical properties. Membership of several stars is strongly debated and age estimates vary from one author to another with doubts about coevality. We revisit the kinematic properties of the TWA in light of new trigonometric parallaxes and proper motions to derive the dynamical age of the association and physical parameters of kinematic members. Using observations performed with the NTT/ESO telescope we measured trigonometric parallaxes and proper motions for 13 stars in TWA. With the convergent point method we identify a co-moving group with 31 TWA stars. We deduce kinematic distances for 7 members of the moving group that lack trigonometric parallaxes. A traceback strategy is applied to the stellar space motions of a selection of 16 of the co-moving objects with accurate and reliable data yielding a dynamical age for the association of t = 7.5 +/- 0.7 Myr. Using our new parallaxes and photometry available in the literature we derive stellar ages and masses from theoretical evolutionary models. With new parallax and proper motion measurements from this work and current astrometric catalogs we provide an improved and accurate database for TWA stars to be used in kinematical analysis. We conclude that the dynamical age obtained via traceback strategy is consistent with previous age estimates for the TWA, and is also compatible with the average ages derived in the present paper from evolutionary models for pre-main sequence stars.
description: 15 pages, 7 figures
MANAGING MILITARY EQUIPMENT PROJECTS IN THE NEW ECONOMIC REALITY
Creators: name: Horzela, Izabela
name: Owczarczyk, Paweł
Publisher: name: Wiedza Obronna
Year: 2022

description: The process of modernization of the Polish Armed Forces has been going on almost continuously since its inception to enable the implementation of the country's military strategy. The purpose of the article is to present issues related to the specifics of the implementation of projects for the provision of military equipment and project management methods used in the arms industry in the current economic reality. In the presented article, using the analysis and synthesis of available materials, the current economic and military situation strongly conditioned by the current actions of the Russian Federation in Ukraine is presented. The requirements for the Polish armaments industry are taken into account in this aspect. In the further part of the article, the authors will focus on presenting the specifics of the operation of armaments industry enterprises and the role they occupy in the system of ensuring the supply of equipment to the Polish Armed Forces. The specific conditions occurring in the implementation of projects in the armaments industry and the most commonly used project methodologies in the industry will also be described. The concept of project implementation efficiency is defined, and the results of research undertaken in this regard are presented. In the conclusions are included conclusions on the issues undertaken.
description: Wiedza Obronna, Tom 280 Nr 3 (2022)
Non-linear mass-spring system for large soft tissue deformations modeling
Creators: name: Nikolaev, Sergei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Implant placement under soft tissues operation is described. In this operation tissues can reach such deformations that nonlinear properties are appeared. A mass-spring model modification for modeling nonlinear tissue operation is developed. A method for creating elasticity module using splines is described. For Poisson ratio different stiffness for different types of springs in cubic grid is used. For stiffness finding an equation system that described material tension is solved. The model is verified with quadratic sample tension experiment. These tests show that sample tension under external forces is equal to defined nonlinear elasticity module. The accuracy of Poisson ratio modeling is thirty five percent that is better the results of available ratio modeling method.
description: 9 pages, 2 figures, 4 charts
Blue-Action experience in organizing science to policy briefings: Some insights
Creators: name: Bearzotti, Chiara
name: Grist, Hannah
Publisher: name: Zenodo
Year: 2020
Subjects: lessons learned, policy briefing, how to

description: Blue-Action was invited by EASME to share some insights on how to organise policy briefings. The audience of this event were climate research projects and policy officers working at the European Commission. The presentation was held at the Climate Science 2 Policy (CS2P) event, 17-18 November 2020, organised online. Link to the event: https://ec.europa.eu/easme/en/section/environment/climate-science2policy-workshop
description: The Blue-Action project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 727852
THE BEGINNINGS OF THE POLISH ARMS INDUSTRY IN THE SECOND POLISH REPUBLIC"ARMA" – THE ARMS AND MACHINES FACTORY IN LVIV
Creators: name: Ostanek, Adam Adrian
Publisher: name: Wiedza Obronna
Year: 2022

description: The purpose of this study is to introduce the operation of the Arms and Machines Factory "Arma" in Lviv. It was one of the first armaments companies in the Second Republic. The company made great contributions to the work of rebuilding Poland after the end of World War I, and from then on, by fulfilling the orders of the Polish Army, had an impact on the security and defense of the country. The study is based on archival materials collected in Poland and Ukraine, published sources, the press and scientific studies.
description: Wiedza Obronna, Tom 280 Nr 3 (2022)
BUILDING COMPETENCE FOR MODERNISATION AND MAINTENANCE OF HEAVY ARMORED EQUIPMENT ON THE EXAMPLE OF MILITARY AUTOMOTIVE PLANTS S.A. IN POZNAŃ
Creators: name: Jasiński, Grzegorz
Publisher: name: Wiedza Obronna
Year: 2022

description: The author, presenting the recent history of Military Automotive Plants S.A. in Poznań (WZM S.A.) shows the various stages of development of the country’s largest military equipment repair plant. On the example of selected projects carried out in the plant, he shows how important the continuity was as well as a unified and coherent vision of their development, enabling a stable and systematic building of competences for modernization and maintenance of heavy armored equipment used today by the Polish Armed Forces. At the same time it proves that in the last decade the key decision for the development of WZM S.A. was creation of the authorized repair center for Leopard 2A4 and 2A5 tanks in the plants. It allowed not only to survive on the map of the Polish armament plants but it also gave the necessary impetus for further development of the machine park and the qualifications of the engineers and mechanics. Without it any further efficient functioning, or even the development of Polish armored forces using Western technical thought, would be extremely difficult if not impossible.
description: Wiedza Obronna, Tom 280 Nr 3 (2022)
Torus-fitting method for obtaining action variables in two-dimensional Galactic potentials
Creators: name: Ueda, Haruhiko
name: Hara, Takuji
name: Gouda, Naoteru
name: Yano, Taihei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A phase-space distribution function of the steady state in galaxy models that admits regular orbits overall in the phase-space can be represented by a function of three action variables. This type of distribution function in Galactic models is often constructed theoretically for comparison of the Galactic models with observational data as a test of the models. On the other hand, observations give Cartesian phase-space coordinates of stars. Therefore it is necessary to relate action variables and Cartesian coordinates in investigating whether the distribution function constructed in galaxy models can explain observational data. Generating functions are very useful in practice for this purpose, because calculations of relations between action variables and Cartesian coordinates by generating functions do not require a lot of computational time or computer memory in comparison with direct numerical integration calculations of stellar orbits. Here, we propose a new method called a torus-fitting method, by which a generating function is derived numerically for models of the Galactic potential in which almost all orbits are regular. We confirmed the torus-fitting method can be applied to major orbit families (box and loop orbits) in some two-dimensional potentials. Furthermore, the torus-fitting method is still applicable to resonant orbit families, besides major orbit families. Hence the torus-fitting method is useful for analyzing real Galactic systems in which a lot of resonant orbit families might exist.
description: 12 pages, 14 figures
Artificial Noise Revisited
Creators: name: Liu, Shuiyin
name: Hong, Yi
name: Viterbo, Emanuele
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The artificial noise (AN) scheme, proposed by Goel and Negi, is being considered as one of the key enabling technology for secure communications over multiple-input multiple-output (MIMO) wiretap channels. However, the decrease in secrecy rate due to the increase in the number of Eve's antennas is not well understood. In this paper, we develop an analytical framework to characterize the secrecy rate of the AN scheme as a function of Eve's signal-to-noise ratio (SNR), Bob's SNR, the number of antennas in each terminal, and the power allocation scheme. We first derive a closed-form expression for the average secrecy rate. We then derive a closed-form expression for the asymptotic instantaneous secrecy rate with large number of antennas at all terminals. Finally, we derive simple lower and upper bounds on the average and instantaneous secrecy rate that provide a tool for the system design.
description: 4 figures, submitted to IEEE Trans on Wireless Commun
The Important Role of Research Infrastructures  in Context of Smart Grid Technology Development, Validation, and Roll-Out
Creators: name: Strasser, Thomas
name: Lauss, Georg
Publisher: name: Zenodo
Year: 2017
Subjects: research infrastructure
co-simulation
validation
hardware-in-the-loop
testing
smart grids

description: Presentation at Special Session “Multi-lab Interconnections for Large-Scale Simulation and Hardware-in-the-Loop”, IEEE PowerTech Manchester 2017, Manchester, UK, 2017.
Quasiparticle generation efficiency in superconducting thin-films
Creators: name: Guruswamy, T.
name: Goldie, D. J.
name: Withington, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thin-film superconductors with thickness 30 to 500 nm are used as non-equilibrium quantum detectors for photons, phonons or more exotic particles. One of the most basic questions in determining their limiting sensitivity is the efficiency with which the quanta of interest couple to the detected quasiparticles. As low temperature superconducting resonators, thin-films are attractive candidates for producing quantum-sensitive arrayable sensors and the readout uses an additional microwave probe. We have calculated the quasiparticle generation efficiency eta_s for low energy photons in a representative, clean thin-film superconductor (Al) operating well-below its superconductingtransition temperature as a function of film thickness, within the framework of the coupled kineticequations described by Chang and Scalapino.[J. J. Chang and D. J. Scalapino, J. Low Temp. Phys. 31, 1 (1978)]. We have also included the effect of a lower frequency probe. We show that phonon loss from the thin-film reduces eta_s by as much as 40% compared to earlier models that considered relatively thick films or infinite volumes. We also show that the presence of the probe and signal enhances the generation efficiency slightly. We conclude that the ultimate limiting noise equivalent power of this class of detector is determined by the thin-film geometry.
description: 7 pages 7 figures
UNMANNED LAND VEHICLES - DIRECTIONS OF RESEARCH AND DEVELOPMENT
Creators: name: LEWIŃSKI, Ryszard
Publisher: name: Wiedza Obronna
Year: 2022

description: The article presents the historical background and development of unmanned land platforms in selected countries, including Russia, Germany, the US and Poland. The author points out the technical problems of combat use of unmanned land platforms, among others, related to the difficulty of operating in the field, control of armaments, and their lower effectiveness compared to unmanned aerial vehicles. In his opinion, the most desirable directions for the development of unmanned land platforms in the areas of operations support and logistics, and the need to turn to higher-weight platforms. In conclusion, the author postulates the thesis that full autonomous combat use of unmanned land platforms is likely to be economically unjustified as well as unprofitable in terms of the combat value of these vehicles in the next few to several years. The author points out the need to develop this technology and use a technological benchmark mainly of US solutions.
description: Wiedza Obronna, Tom 280 Nr 3 (2022)
Simplified Numerical Modeling of Film Cooling and Mixture Ratio Bias in Liquid Rocket Thrust Chambers
Creators: name:  GIANLUCA COCIRLA
name:   MARCO GROSSI
name:   MARIO TINDARO MIGLIORINO
name:   DANIELE BIANCHI
name:   FRANCESCO NASUTI
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: LIQUID ROCKET ENGINES
FILM COOLING
MIXTURE RATIO BIAS

description: High performance liquid rocket engines are characterized by high pressure and high wall heat fluxes which have to be inevitably managed by an active cooling system. The most commonly used is the regenerative cooling system, which, however, may result insufficient. In such cases, cooling capabilities can be enhanced by other active cooling means, like film cooling or mixture ratio bias of peripheral injectors. The additional active cooling system has a cost in terms of performance. The present numerical parametric study provides a general cost-benefit analysis of this cooling systems in an oxygen-methane engine.
Report on TID algorithms
Creators: name: Altadill, David
name: Belehaki, Anna
name: Blanch, Estefania
name: Borries, Claudia
name: Buresova, Dalia
name: Galkin, Ivan
name: Haralambous, Haris
name: JUAN ZORNOZA, José Miguel
name: Kutiev, Ivan
name: Oikonomou, Christina
name: SANZ SUBIRANA, Jaume
name: Tsagouri, Ioanna
Publisher: name: Zenodo
Year: 2018
Subjects: Ionosphere
Space Weather
Travelling Ionospheric Disturbances
Digisonde
GNSS
EGNOS
HF communication
HF geolocation
N-RTK

description: TechTIDE project, funded by the European Commission Horizon 2020 Research and Innovation Program, will establish a pre-operational system to demonstrate reliability of a set of TID (Travelling Ionospheric Disturbances) detection methodologies to issue warnings of the occurrence of TIDs over the region extending from Europe to South Africa. TechTIDE warning system will estimate the parameters that specify the TID characteristics and the inferred perturbation, with all additional geophysical information to the users to help them assess the risks and to develop mitigation techniques, tailored to their application. This document is TechTIDE D2.2 “Report on the TID algorithms” and it is an output of TechTIDE Task 2.2 (Development of the TID identification algorithms and products) of the WP2 (TID identification methodologies) which has the final goal to release the basic algorithms for the TID identification and to test a first version of the value-added products for implementation in the TechTIDE warning system.  The document highlights four aspects of the TID algorithm release process, (1) Development based on the concept, techniques, and algorithms (2) Verification, an internal testing process that ensures algorithm correctness, (3) Benchmarking needed to prepare algorithms to transition to operations, and (4) Validation, an external process of ensuring that developed algorithms are compliant with the stated end user expectations.
Protostar mass functions in young clusters
Creators: name: Myers, Philip C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In an improved model of protostar mass functions (PMFs), protostars gain mass from isothermal cores in turbulent clumps. Their mass accretion rate is similar to Shu accretion at low mass, and to reduced Bondi accretion at high mass. Accretion durations follow a simple expression in which higher-mass protostars accrete for longer times. These times are set by ejections, stellar feedback, and gravitational competition, which terminate accretion and reduce its efficiency. The mass scale is the mass of a critically stable isothermal core. In steady state, the PMF approaches a power law at high mass due to competition between clump accretion and accretion stopping. The power law exponent is the ratio of the time scales of accretion and accretion stopping. The luminosity function (PLF) peaks near 1 L_Sun, due to inefficient accretion of core gas. Models fit observed PLFs in four large embedded clusters. These indicate that their underlying PMFs may be top-heavy compared to the IMF, depending on the model of protostar radius.
description: accepted by The Astrophysical Journal