cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Near-field coded-mask technique and its potential for proton therapy monitoring
Creators: name: Hetzel, Ronja
name: Urbanevych, Vitalii
name: Bolke, Andreas
name: Kasper, Jonas
name: Kołodziej, Magdalena
name: Kercz, Monika
name: Magiera, Andrzej
name: Mueller, Florian
name: Müller, Sara
name: Rafecas, Magdalena
name: Rusiecka, Katarzyna
name: Schug, David
name: Schulz, Volkmar
name: Stahl, Achim
name: Weissler, Bjoern
name: Wong, Ming-Liang
name: Wrońska, Aleksandra
Publisher: name: arXiv
Year: 2023
Subjects: subject: Medical Physics (physics.med-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Objective. Prompt-gamma imaging encompasses several approaches for online monitoring of beam range or deposited dose distribution in proton therapy. We test one of the imaging techniques - a coded mask approach - both experimentally and via simulations. Approach. Two imaging setups have been investigated experimentally. Each of them comprised a structured tungsten collimator in a form of a MURA mask and a LYSO:Ce scintillation detector of fine granularity. The setups differed in the detector dimensions and the operation mode (1D or 2D imaging). A series of measurements with radioactive sources have been conducted, testing the setups' performance of near-field gamma imaging. Additionally, Monte Carlo simulations of a larger setup of the same type were conducted, investigating its performance with a realistic gamma source distribution occurring during proton therapy. Main results. The images of point-like sources reconstructed from two smallscale prototypes' data using the MLEM algorithm constitute the experimental proof of principle for the near-field coded-mask imaging modality, both in the 1D and the 2D mode. Their precision allowed us to calibrate out certain systematic offsets appearing due to the misalignment of setup elements. The simulation of the full-scale setup yielded a mean distal falloff retrieval precision of 0.72 mm in the studies for beam energy range 89.5-107.9 MeV and with 1x10^8 protons (typical number for single distal spots). The implemented algorithm of image reconstruction is relatively fast - a typical procedure needs several seconds. Significance. Coded-mask imaging appears a valid option for proton therapy monitoring. The results of simulations let us conclude that the proposed fullscale setup is competitive to the knife-edge-shaped and the multiparalell slit cameras investigated by other groups.
title: Espaces sahéliens
Creators: name: Fontaine, N.
name: Magnier, S.
name: CIRAD-IEMVT-FRA
Publisher: name: CTA; CIRAD-IEMVT
Year: 1989
Subjects: subject: Type de sol
subject: Classification des terres
subject: Topographie
subject: Sénégal
subject: Sahel
subject: Afrique occidentale
subject: P31 - Levée et cartographie des sols
subject: P32 - Classification des sols et pédogénèse
subject: P31 - Soil surveys and mapping
subject: P32 - Soil classification and genesis

description: In : Élevage et potentialités pastorales sahéliennes. Synthèses cartographiques. Sénégal = Animal husbandry and Sahelian pastoral potentialities. Cartographic synthesis. Senegal. CIRAD-IEMVT. Wageningen : CTA-CIRAD-IEMVT. ISBN 2-85985-125-9
Super-FRS design status report
Creators: name: Winkler, M.
name: Althoff, S.
name: Amjad, F.
name: Behr, K.
name: Bergmann, A.
name: Blatz, T.
name: Brünle, A.
name: Cho, E. J.
name: Freisleben, W.
name: Geissel, H.
name: Gleim, M.
name: Karagiannis, C.
name: Kindler, B.
name: Kollmus, H.
name: Kozlova, E.
name: Krämer, A.
name: Kratz, A.
name: Kurdal, J.
name: Leibrock, H.
name: Müller, H.
name: Münzenberg, G.
name: Mühle, C.
name: Mukha, I.
name: Nociforo, C.
name: Orona, L. M.
name: Pietri, S.
name: Prochazka, A.
name: Purushotaman, S.
name: Ricciardi, M. V.
name: Scheidenberger, C.
name: Schirru, F.
name: Schlör, C.
name: Schnizer, P.
name: Simon, H.
name: Szwangruber, P.
name: Wamers, F.
name: Weick, H.
name: Will, C.
name: Winfield, J.
name: Xiang, Y.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
The Invisible Axion and Neutrino Masses
Creators: name: Dias, Alex G.
name: Pleitez, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that in any invisible axion model due to the effects of effective non-renormalizable interactions related to an energy scale near the Peccei-Quinn, grand unification or even the Planck scale, active neutrinos necessarily acquire masses in the sub-eV range. Moreover, if sterile neutrinos are also included and if appropriate cyclic $Z_N$ symmetries are imposed, it is possible that some of these neutrinos are heavy while others are light.
description: An example included and new references added. To appear in PRD
CASCADE3 A Monte Carlo event generator based on TMDs
Creators: name: Baranov, S.
name: Martinez, A. Bermudez
name: Banos, L. I. Estevez
name: Guzman, F.
name: Hautmann, F.
name: Jung, H.
name: Lelek, A.
name: Lidrych, J.
name: Lipatov, A.
name: Malyshev, M.
name: Mendizabal, M.
name: Monfared, S. Taheri
name: van Kampen, A. M.
name: Wang, Q.
name: Yang, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The CASCADE3 Monte Carlo event generator based on Transverse Momentum Dependent (TMD) parton densities is described. Hard processes which are generated in collinear factorization with LO multileg or NLO parton level generators are extended by adding transverse momenta to the initial partons according to TMD densities and applying dedicated TMD parton showers and hadronization. Processes with off-shell kinematics within $k_t$-factorization, either internally implemented or from external packages via LHE files, can be processed for parton showering and hadronization. The initial state parton shower is tied to the TMD parton distribution, with all parameters fixed by the TMD distribution.
description: 20 pages, 3 figures Replaced with EPJC published version
Moments of ideal class counting functions
Creators: name: Au, Kam Cheong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 11N37, 11R42 (Primary) 11F30, 20C15 (Secondary)

description: We consider the counting function of ideals in a given ideal class of a number field of degree $d$. This describes, at least conjecturally, the Fourier coefficients of an automorphic form on $\text{GL}(d)$, typically not a Hecke eigenform and not cuspidal. We compute its moments, and also investigate the moments of the corresponding cuspidal projection.
Self-organized wavy infection curve of COVID-19
Creators: name: Odagaki, Takashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Exploiting the SIQR model for COVID-19, I show that the wavy infection curve in Japan is the result of fluctuation of policy on isolation measure imposed by the government and obeyed by citizens. Assuming the infection coefficient be a two-valued function of the number of daily confirmed new cases, I show that when the removal rate of infected individuals is between these two values, the wavy infection curve is self-organized. On the basis of the infection curve, I classify the outbreak of COVID-19 into five types and show that these differences can be related to the relative magnitude of the transmission coefficient and the quarantine rate of infected individuals.
description: 10 pages,10 figures
Super-FRS slit system and possible passive cooling techniques
Creators: name: Gellanki, J.
name: Douma, C.
name: Kalantar, N.
name: Kuiken, O. J.
name: Lindemulder, M. F.
name: Moeini, H.
name: Nociforo, C.
name: Rigollet, C.
name: Smit, H. A. J.
name: Timersam, H. J.
name: Behr, Karl-Heinz
name: Karagiannis, C.
name: Gleim, C.
name: Schlör, C.
name: Simon, H.
name: Winkler, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
title: Carte des potentialités pastorales : Dakar
Creators: name: Fontaine, N.
name: Magnier, S.
name: CIRAD-IEMVT-FRA
Publisher: name: CTA; CIRAD-IEMVT
Year: 1989
Subjects: subject: Élevage
subject: Pastoralisme
subject: Végétation
subject: Aptitude des terres
subject: Fertilité du sol
subject: Type de sol
subject: Sénégal
subject: Sahel
subject: Afrique occidentale
subject: P31 - Levée et cartographie des sols
subject: P10 - Ressources en eau et leur gestion
subject: F70 - Taxonomie végétale et phyto-géographie
subject: P31 - Soil surveys and mapping
subject: P10 - Water resources and management
subject: F70 - Plant taxonomy and geography

description: In : Élevage et potentialités pastorales sahéliennes. Synthèses cartographiques. Sénégal = Animal husbandry and Sahelian pastoral potentialities. Cartographic synthesis. Senegal. CIRAD-IEMVT. Wageningen : CTA-CIRAD-IEMVT. ISBN 2-85985-125-9
Profile monitors for the Super-FRS
Creators: name: Nociforo, C.
name: Adamczewski-Musch, J.
name: Behr, K. H.
name: Brünle, A.
name: Frühauf, J.
name: Kurz, N.
name: Löchner, S.
name: Reiter, A.
name: Rytkönen, K.
name: Witthaus, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Role Performance of Female Headteachers in Primary Schools: A Case of Bondo District, Kenya
Creators: name: Atieno, Omondi E.
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: The purpose of the study was to determine the role performance of female head teachers in primary schools in Bondo district of the republic of Kenya. Descriptive survey design was used in the study. As the population of female headteachers is not so big, 16 out of 17 schools were used for the research. Questionnaire and interview guide were used to gather information from the respondents. Data were analysed using tally marks and total frequencies to generate frequency accounts out of which percentages were calculated. Information collected through interview schedules and discussions were thematically described. The findings revealed that in all six administrative tasks, the female head teachers' performance was generally good. It is expected that the results of this study may help to shed light on how female head teachers perform their roles as administrators and to provide some indication of direction that could change the perception of the role of female head teachers from negative to positive. Results may also provide an indication of what additional steps may need to be taken to address the elevations of more female teachers to leadership roles. Based on the findings of the study, it was recommended that the government should come up with mentors among the female head teachers, thoroughly train some of them who will in turn be in a positions to offer assistance and more guidance to their counter parts. This will help motivate female teachers to pursue leadership roles.
description: Advancing Women in Leadership Journal, Vol. 33 (2013)
The Role of Interpreters in Sense-Making by Women Leaders
Creators: name: Earley, Penelope M.
name: Applegate, Jane H.
name: Tarule, Jill M.
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: In this study, we examine individual sense-making by women leaders using meta-synthesis, a modification of meta-ethnography, to analyze 11 vignettes written by women leaders published in three prior studies. The data were coded and the text analyzed, to create a new interpretation from the existing qualitative studies. Two theoretical lenses informed this study: gendered leadership in education contexts and sense-making. The data were organized into five categories and common to all was the finding that the women leaders tested their perceptions of events as a form of sense-making. Using Dervin's (2003) "situations-gaps-users" model we determined that most of the women relied upon interpreters (who in general are neither formal mentors nor advisors) to help them bridge information gaps.
description: Advancing Women in Leadership Journal, Vol. 33 (2013)
title: Carte des potentialités pastorales : Matam
Creators: name: Fontaine, N.
name: Magnier, S.
name: CIRAD-IEMVT-FRA
Publisher: name: CTA; CIRAD-IEMVT
Year: 1989
Subjects: subject: Élevage
subject: Pastoralisme
subject: Végétation
subject: Fertilité du sol
subject: Pâturages
subject: Aptitude des terres
subject: Sénégal
subject: Sahel
subject: Afrique occidentale
subject: P31 - Levée et cartographie des sols
subject: P10 - Ressources en eau et leur gestion
subject: F70 - Taxonomie végétale et phyto-géographie
subject: P31 - Soil surveys and mapping
subject: P10 - Water resources and management
subject: F70 - Plant taxonomy and geography

description: In : Élevage et potentialités pastorales sahéliennes. Synthèses cartographiques. Sénégal = Animal husbandry and Sahelian pastoral potentialities. Cartographic synthesis. Senegal. CIRAD-IEMVT. Wageningen : CTA-CIRAD-IEMVT. ISBN 2-85985-125-9
X-Ray Transitions from Antiprotonic Noble Gases
Creators: name: Gotta, D.
name: Rashid, K.
name: Fricke, B.
name: Indelicato, P.
name: Simons, L. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The onset of antiprotonic X-ray transitions at high principal quantum numbers and the occurence of electronic X-rays in antiprotonic argon, krypton, and xenon has been analyzed with the help of Multiconfiguration Dirac-Fock calculations. The shell-by-shell ionisation by Auger electron emission, characterised by appearance and disappearance of X-ray lines, is followed through the antiprotonic cascade by considering transition and binding energies of both the antiproton and the remaining electrons. Electronic lines could be attributed partly to specific states of the antiprotonic atom de-excitation.
description: 16 pages, 13 figures
Hierarchy of Supersymmetric Higher Spin Connections
Creators: name: Buchbinder, I. L.
name: Gates, S. James
name: Koutrolikos, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We focus on the geometrical reformulation of free higher spin supermultiplets in $4\rm{D},~\mathcal{N}=1$ flat superspace. We find that there is a de Wit-Freedman like hierarchy of superconnections with simple gauge transformations. The requirement for sensible free equations of motion imposes constraints on the gauge parameter superfields. Unlike the nonsupersymmetric case, we find several different constraints that can decouple the higher superconnections. By lifting these constraints nongeometrically via compensators we recover all known descriptions of arbitrary integer and half-integer gauge supermultiplets. In the constrained formulation we find a new description of half-integer supermultiplets, generalizing the new-minimal and virial formulations of linearized supergravity to higher spins. However this description can be formulated using compensators. The various descriptions can be labeled as geometrical or nongeometrical if the equations of motion can be expressed purely in terms of superconnections or not.
In-beam test of the TwinTPC at FRS
Creators: name: Prochazka, A.
name: Pikna, M.
name: Sitar, B.
name: Peter, S.
name: Szarka, I.
name: Nociforo, C.
name: Pietri, S.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Gauge field theory for Poincaré-Weyl group
Creators: name: Babourova, O. V.
name: Frolov, B. N.
name: Zhukovsky, V. Ch.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: On the basis of the general principles of a gauge field theory the gauge theory for the Poincaré-Weyl group is constructed. It is shown that tetrads are not true gauge fields, but represent functions from true gauge fields: Lorentzian, translational and dilatational ones. The equations of gauge fields which sources are an energy-momentum tensor, orbital and spin momemta, and also a dilatational current of an external field are obtained. A new direct interaction of the Lorentzian gauge field with the orbital momentum of an external field appears, which describes some new effects. Geometrical interpretation of the theory is developed and it is shown that as a result of localization of the Poincaré-Weyl group spacetime becomes a Weyl-Cartan space. Also the geometrical interpretation of a dilaton field as a component of the metric tensor of a tangent space in Weyl-Cartan geometry is proposed.
description: LaTex, 27 pages, no figures
Additional file 6 of cAMP activates calcium signalling via phospholipase C to regulate cellulase production in the filamentous fungus Trichoderma reesei
Creators: name: Yumeng Chen
name: Xingjia Fan
name: Xinqing Zhao
name: Yaling Shen
name: Xiangyang Xu
name: Liujing Wei
name: Wang, Wei
name: Dongzhi Wei
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology

description: Additional file 6: Figure S6. Volcano plot analysis of up- and downregulated genes of strains treated with or without 10 mM Mn2+ treatment. Volcano plot for differences in gene expression with no addition or 10 mM Mn2+ addition. Red dots indicate significantly upregulated genes, green dots indicate significantly downregulated genes, and grey dots indicate non-significantly different gene expression. The x-axis represents the logarithm of the differential multiple of a gene expression in two samples. The y-axis represents the negative log of a statistically significant change in gene expression. Control: parental strain QM6a without 10 mM Mn2+ treatment; Sample 1: parental strain QM6a with 10 mM Mn2+ treatment.
Implications of Gravitational-wave Production from Dark Photon Resonance to Pulsar-timing Observations and Effective Number of Relativistic Species
Creators: name: Namba, Ryo
name: Suzuki, Motoo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The coherent oscillation of axionic fields naturally drives copious production of dark photon particles in the early universe, due to resonance and tachyonic enhancement. During the process, energy is abruptly transferred from the former to the latter, sourcing gravitational wave generation. The resulting gravitational waves are eventually to be observed as stochastic background today. We report analytical results of this production and connect them to the recent pulsar-timing results by the NANOGrav collaboration. We show an available parameter space, around the mass $m_ϕ\sim 10^{-13} \, {\rm eV}$ and the decay constant $f_ϕ\sim 10^{16} \, {\rm GeV}$ with a dimensionless coupling of ${\cal O}(1)$, for our mechanism to account for the signal. A mechanism to avoid the axion over-dominating the universe is a necessary ingredient of this model, and we discuss a possibility to recover a symmetry and render the axion massless after the production. We also comment on potential implications of the required effective number of relativistic species to the determination of the present Hubble constant.
description: 13 pages, 2 figures. Minor changes, citation additions. Version to be published in Physical Review D
Political Leaders and the Media: A Relationship that Impacts on the Nation's Consciousness
Creators: name: Rodgers-Healey, Diann
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: This study aimed to further investigate the relationship between politicians and the media and its impact on the consciousness of Australians during a critical period of political events in late November 2009 and early December 2009 in Australia. The findings of this study reflect limitations in perceptions of political leaders as governed by gaps in how the media portrays leaders, leadership, and issues that are of significance to a nation, and gaps in how politicians convey information and analysis to the public through the media. The study highlights how influential the Australian media is in shaping perceptions of wide ranging issues beyond those directly covered. It points to recommendations to empower and enable effective decision-making at all levels of society.
description: Advancing Women in Leadership Journal, Vol. 33 (2013)
On the crystal structure of intrinsic CVD diamond-on-iridium sensors
Creators: name: Berdermann, E.
name: Kis, M.
name: Schmidt, C. J.
name: Träger, M.
name: Visinka, R.
name: Voss, K.
name: Fischer, M.
name: Gsell, S.
name: Mayr, M.
name: Schreck, M.
name: Afanaciev, K.
name: Ciobanu, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Very Hairy Inflation
Creators: name: D'Amico, Guido
name: Kaloper, Nemanja
name: Westphal, Alexander
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2021
Subjects: gravitation: stochastic
correction: derivative
inflation: model
background: vector
chiral
BICEP
monodromy
tension
inflaton
U(1)
dark energy
tachyon
non-Gaussianity
cosmic background radiation
observatory
big bang
flux
nonlinear
Einstein Telescope
LISA
hair
cosmological model
effective field theory
strong coupling

description: We revisit the rollercoaster cosmology based on multiple stages of monodromy inflation. Working within the framework of effective flux monodromy field theory, we include the full range of strong coupling corrections to the inflaton sector. We find that flattened potentials $V \sim \phi^p + \ldots$ with $p \lesssim 1/2$, limited to $ N \lesssim 25 - 40$ efolds in the first stage of inflation, continue to fit the CMB. They yield $0.96 \lesssim n_s \lesssim 0.97$, and produce relic gravity waves with $0.006 \lesssim r \lesssim 0.035$, in full agreement with the most recent bounds from BICEP/Keck. The nonlinear derivative corrections generated by strong dynamics in EFT also lead to equilateral non-Gaussianity $f_{NL}^{eq} \simeq {\cal O}(1) - {\cal O}(10)$, close to the current observational bounds. Finally, in multi-stage rollercoaster, an inflaton-hidden sector $U(1)$ coupling can produce a tachyonic chiral vector background, which converts rapidly into tensors during the short interruption by matter domination. The produced stochastic gravity waves are chiral, and so they may be clearly identifiable by gravity wave instruments like LISA, Big Bang Observatory, Einstein Telescope, NANOgrav or SKA, depending on the precise model realization. We also point out that the current attempts to resolve the $H_0$ tension using early dark energy generically raise $n_s$. This may significantly alter the impact of BICEP/Keck data on models of inflation.
Additional file 5 of cAMP activates calcium signalling via phospholipase C to regulate cellulase production in the filamentous fungus Trichoderma reesei
Creators: name: Yumeng Chen
name: Xingjia Fan
name: Xinqing Zhao
name: Yaling Shen
name: Xiangyang Xu
name: Liujing Wei
name: Wang, Wei
name: Dongzhi Wei
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology

description: Additional file 5: Figure S5. Effect of cAMP/LaCl3-induced cellulase overexpression. a and b. pNPCase activity/mg biomass (a) and CMCase activity/mg biomass (b) of T. reesei QM6a strains supplemented with 5 mM dbcAMP and 5 mM LaCl3. Values are the means ± SD of the results from three independent experiments. Asterisks indicate significant differences from the control (*p < 0.05, Student’s t test).
Writer Identification and Writer Retrieval Based on NetVLAD with Re-ranking
Creators: name: Rasoulzadeh, Shervin
name: Babaali, Bagher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: This paper addresses writer identification and writer retrieval which is considered as a challenging problem in the document analysis and recognition field. In this work, a novel pipeline is proposed for the problem at hand by employing a unified neural network architecture consisting of the ResNet-20 as a feature extractor and an integrated NetVLAD layer, inspired by the vector of locally aggregated descriptors (VLAD), in the head of the latter part. Having defined this architecture, the triplet semi-hard loss function is used to directly learn an embedding for individual input image patches. Subsequently, generalized max-pooling technique is employed for the aggregation of embedded descriptors of each handwritten image. Also, a novel re-ranking strategy is introduced for the task of identification and retrieval based on $k$-reciprocal nearest neighbors, and it is shown that the pipeline can benefit tremendously from this step. Experimental evaluation has been done on the three publicly available datasets: the ICDAR 2013, CVL, and KHATT datasets. Results indicate that while we perform comparably to the state-of-the-art on the KHATT, our writer identification and writer retrieval pipeline achieves superior performance on the ICDAR 2013 and CVL datasets in terms of mAP.
description: 22 pages, 12 figures
VLT Spectroscopy of Ultra-Faint Dwarf Galaxies. 1. Boötes I, Leo IV, Leo V
Creators: name: Jenkins, Sydney
name: Li, Ting S.
name: Pace, Andrew B.
name: Ji, Alexander P.
name: Koposov, Sergey E.
name: Mutlu-Pakdil, Burcin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform consistent reductions and measurements for three ultra-faint dwarf galaxies (UFDs): Boötes I, Leo IV and Leo V. Using the public archival data from the GIRAFFE spectrograph on the Very Large Telescope (VLT), we locate new members and provide refined measurements of physical parameters for these dwarf galaxies. We identify nine new Leo IV members and four new Leo V members, and perform a comparative analysis of previously discovered members. Additionally, we identify one new binary star in both Leo IV and Leo V. After removing binary stars, we recalculate the velocity dispersions of Boötes I and Leo IV to be 5.1$^{+0.7}_{-0.8}$ and 3.4$^{+1.3}_{-0.9}$ km s$^{-1}$, respectively; We do not resolve the Leo V velocity dispersion. We identify a weak velocity gradient in Leo V that is $\sim$4$\times$ smaller than the previously calculated gradient and that has a corresponding position angle which differs from the literature value by $\sim$120 deg. Combining the VLT data with previous literature, we re-analyze the Boötes I metallicity distribution function and find that a model including infall of pristine gas while Boötes I was forming stars best fits the data. Our analysis of Leo IV, Leo V and other UFDs will enhance our understanding of these enigmatic stellar populations and contribute to future dark matter studies. This is the first in a series of papers examining thirteen UDFs observed with VLT/GIRAFFE between 2009 and 2017. Similar analyses of the remaining ten UFDs will be presented in forthcoming papers.
description: 29 pages, 18 figures, 8 tables. Accepted for publication on ApJ. Code and data can be found at https://github.com/sazabi4/vlt_dwarf/
The CHiME-7 UDASE task: Unsupervised domain adaptation for conversational speech enhancement
Creators: name: Leglaive, Simon
name: Borne, Léonie
name: Tzinis, Efthymios
name: Sadeghi, Mostafa
name: Fraticelli, Matthieu
name: Wisdom, Scott
name: Pariente, Manuel
name: Pressnitzer, Daniel
name: Hershey, John R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Supervised speech enhancement models are trained using artificially generated mixtures of clean speech and noise signals, which may not match real-world recording conditions at test time. This mismatch can lead to poor performance if the test domain significantly differs from the synthetic training domain. This paper introduces the unsupervised domain adaptation for conversational speech enhancement (UDASE) task of the 7th CHiME challenge. This task aims to leverage real-world noisy speech recordings from the target domain for unsupervised domain adaptation of speech enhancement models. The target domain corresponds to the multi-speaker reverberant conversational speech recordings of the CHiME-5 dataset, for which the ground-truth clean speech reference is unavailable. Given a CHiME-5 recording, the task is to estimate the clean, potentially multi-speaker, reverberant speech, removing the additive background noise. We discuss the motivation for the CHiME-7 UDASE task and describe the data, the task, and the baseline system.
Plasmon-enhanced graphene photodetector with CMOS-compatible titanium nitride
Creators: name: AlAloul, Mohammed
name: Rasras, Mahmoud
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Graphene has emerged as an ultrafast optoelectronic material for on-chip photodetector applications. The 2D nature of graphene enables its facile integration with complementary metal-oxide semiconductor (CMOS) microelectronics and silicon photonics, yet graphene absorbs only $\sim$2.3% of light. Plasmonic metals can enhance the responsivity of graphene photodetectors, but may result in CMOS-incompatible devices, depending on the choice of metal. Here, we propose a plasmon-enhanced photothermoelectric graphene detector using CMOS-compatible titanium nitride (TiN) on the silicon-on-insulator (SOI) platform. The device performance is quantified by its responsivity, operation speed, and noise equivalent power. Its bandwidth exceeds 100$\,$GHz, and it exhibits a nearly flat photoresponse across the telecom C-band. The photodetector responsivity is as high as 1.4$\,$A/W (1.1$\,$A/W external) at an ultra-compact length of 3.5$\,μ$m, which is the most compact footprint reported for a graphene-based waveguide photodetector. Furthermore, it operates at zero-bias, consumes zero energy, and has an ultra-low intrinsic noise equivalent power (NEP$\,$
description: Based on recent experimental findings, hyperbolic phonon polaritons dominate the hot carrier cooling mechanism in graphene-hBN Van der Waals heterostructures
Relic keV sterile neutrinos and reionization
Creators: name: Biermann, Peter L.
name: Kusenko, Alexander
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A sterile neutrino with mass of several keV can account for cosmological dark matter, as well as explain the observed velocities of pulsars. We show that X-rays produced by the decays of these relic sterile neutrinos can boost the production of molecular hydrogen, which can speed up the cooling of gas and the early star formation, which can, in turn, lead to a reionization of the universe at a high enough redshift to be consistent with the WMAP results.
description: 4 pages, 2 figures; minor changes in the text and references; to appear in PRL
Development of large area diamond detectors for time-of-flight measurements of heavy ions
Creators: name: Schirru, F.
name: Nociforo, C.
name: Kis, M.
name: Ciobanu, M. I.
name: Frühauf, J.
name: Träger, M.
name: Visinka, R.
name: Behr, K.
name: Brünle, A.
name: Dillmann, I.
name: Karagiannis, C.
name: Kratz, A.
name: Kurz, N.
name: Marta, M.
name: Prochazka, A.
name: Pietri, S.
name: Purushothaman, S.
name: Szczepanczyk, B.
name: Weick, H.
name: Winkler, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Studying Turbulence using Doppler-broadened lines: Velocity Coordinate Spectrum
Creators: name: Lazarian, A.
name: Pogosyan, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss a new technique for studying astrophysical turbulence that utilizes the statistics of Doppler-broadened spectral lines. The technique relates the power Velocity Coordinate Spectrum (VCS), i.e. the spectrum of fluctuations measured along the velocity axis in Position-Position-Velocity (PPV) data cubes available from observations, to the underlying power spectra of the velocity/density fluctuations. Unlike the standard spatial spectra, that are function of angular wavenumber, the VCS is a function of the velocity wave number k_v ~ 1/v. We show that absorption affects the VCS to a higher degree for small k_v and obtain the criteria for disregarding the absorption effects for turbulence studies at large k_v. We consider the retrieval of turbulence spectra from observations for high and low spatial resolution observations and find that the VCS allows one to study turbulence even when the emitting turbulent volume is not spatially resolved. This opens interesting prospects for using the technique for extragalactic research. We show that, while thermal broadening interferes with the turbulence studies using the VCS, it is possible to separate thermal and non-thermal contributions. This allows a new way of determining the temperature of the interstellar gas using emission and absorption spectral lines.
description: 27 page, 3 figures, content extended and presentation reorganized to correspond to the version accepted to ApJ
Long time rigidity to flux-induced symmetry breaking in quantum quench dynamics
Creators: name: Rossi, Lorenzo
name: Barbiero, Luca
name: Budich, Jan Carl
name: Dolcini, Fabrizio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate how the breaking of charge conjugation symmetry $\mathcal{C}$ impacts on the dynamics of a half-filled fermionic lattice system after global quenches. We show that, when the initial state is insulating and the $\mathcal{C}$-symmetry is broken non-locally by a constant magnetic flux, local observables and correlations behave as if the symmetry were unbroken for a time interval proportional to the system size $L$. In particular, the local particle density of a quenched dimerized insulator remains pinned to $1/2$ in each lattice site for an extensively long time, while it starts to significantly fluctuate only afterwards. Due to its qualitative resemblance to the sudden arrival of rapidly rising ocean waves, we dub this phenomenon the ``tsunami effect". Notably, it occurs even though the chiral symmetry is dynamically broken right after the quench. Furthermore, we identify a way to quantify the amount of symmetry breaking in the quantum state, showing that in insulators perturbed by a flux it is exponentially suppressed as a function of the system size, while it is only algebraically suppressed in metals and in insulators with locally broken $\mathcal{C}$-symmetry. The robustness of the tsunami effect to weak disorder and interactions is demonstrated, and possible experimental realizations are proposed.
description: 22 pages, 8 figures
The Movement from Secret Acts of Defiance to Manifestation of Women's Empowerment
Creators: name: Bissessar, Charmaine
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: Before the advent of L'écriture féminine and the feminist revolution, Chinese women formed a kinship through the secret language of Nu Shu. Cixous, Kristeva, and Irigaray concentrated on redefining themselves as asexual-neither male nor female. Chinese women in the nineteenth century used Nu Shu as a form of affinity and passive aggressive defiance of the androcentric society in which they lived. They embraced their femininity in the curves and strokes of the Nu Shu language. Condé and Schwarz-Bart searched to explore the themes of alienation as Martinicans living in a European French society and the search for an identity that typifies the quintessential Caribbean patriarchal culture. The evolution in consciousness of the female and how she sees herself as part of the diasporic dilemma confronting Caribbean society is marked by the almost limited early works by women authors. As women found their voices and led the way for other women, a natural empowerment ensued with new loyalties as generations transcended the effects of colonialism, indentureship, and slavery. Afro-Caribbean women became vocal and paved the way for East Indian writers to emerge and find their voices. Contemporary literature exemplifies these women's struggles toward empowerment and identification with the land of their birth. From confusion spawns a new position for women as they move toward self-expression and self-actualization with the appointment of the first Indo-Trinidadian female Prime Minister.
description: Advancing Women in Leadership Journal, Vol. 33 (2013)
Ergodic observables in non-ergodic systems: the example of the harmonic chain
Creators: name: Baldovin, Marco
name: Marino, Raffaele
name: Vulpiani, Angelo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the framework of statistical mechanics the properties of macroscopic systems are deduced starting from the laws of their microscopic dynamics. One of the key assumptions in this procedure is the ergodic property, namely the equivalence between time averages and ensemble averages. This property can be proved only for a limited number of systems; however, as proved by Khinchin [1], weak forms of it hold even in systems that are not ergodic at the microscopic scale, provided that extensive observables are considered. Here we show in a pedagogical way the validity of the ergodic hypothesis, at a practical level, in the paradigmatic case of a chain of harmonic oscillators. By using analytical results and numerical computations, we provide evidence that this non-chaotic integrable system shows ergodic behavior in the limit of many degrees of freedom. In particular, the Maxwell-Boltzmann distribution turns out to fairly describe the statistics of the single particle velocity. A study of the typical time-scales for relaxation is also provided.
description: 10 pages, 2 figures
Variability of self-adjusted gain characteristics (Kursun et al., 2025)
Creators: name: Kursun, Bertan
name: Shola, Chemay
name: Cunio, Isabella E.
name: Langley, Lauren
name: Shen, Yi
Publisher: name: ASHA journals
Year: 2025
Subjects: classificationCode: 420102
subject: Audiology
classificationCode: 470102
subject: Communication technology and digital media studies
classificationCode: 460212
subject: Speech recognition

description: Purpose: Although users can customize the frequency–gain response of hearing aids, the variability in their individual adjustments remains a concern. This study investigated the within-subject variability in the gain adjustments made within a single self-adjustment procedure.Method: Two experiments were conducted with 20 older adults with mild-to-severe hearing loss. Participants used a two-dimensional touchscreen to adjust hearing aid amplification across six frequency bands (0.25–8 kHz) while listening to continuous speech in background noise. In these two experiments, two user interface designs, differing in control-to-gain map, were tested. For each participant, the statistical properties of 30 repeated gain adjustments within a single self-adjustment procedure were analyzed.Results: When participants made multiple gain adjustments, their preferred gain settings showed the highest variability in the 4- and 8-kHz frequency bands and the lowest variability in the 1- and 2-kHz bands, suggesting that midfrequency bands are weighted more heavily in their preferences compared to high frequencies. Additionally, significant correlations were observed for the preferred gains between the 0.25- and 0.5-kHz bands, between the 0.5- and 1-kHz bands, and between the 4- and 8-kHz bands. Lastly, the standard error of the preferred gain reduced with an increasing number of trials, with a rate close to being slightly shallower than would be expected for invariant mean preference for most participants, suggesting convergent estimation of the underlying preference across trials.Conclusion: Self-adjustments of frequency–gain profiles are informative about the underlying preference; however, the contributions from various frequency bands are neither equal nor independent.Supplemental Material S1. Experiment instruction pages.Kursun, B., Shola, C., Cunio, I. E., Langley, L., & Shen, Y. (2025). Variability of preference-based adjustments on hearing aid frequency–gain response. Journal of Speech, Language, and Hearing Research, 68(4), 2006–2025. https://doi.org/10.1044/2024_JSLHR-24-00215
Mentoring: A model for cultivating leadership competencies in Kenyan women religious
Creators: name: Wakahiu, Jane
Publisher: name: Advancing Women in Leadership Journal
Year: 2017

description: Encouraging leadership development in African women religious is an essential strategy to build their confidence to take on leadership positions and execute decisions efficiently in their organizations. Using twelve Kenyan women religious participants of a three-year, Hilton Foundation-supported Sisters Leadership Development Initiative (SLDI) program, this qualitative case study examines the role of mentoring as a strategy to propagate meaningful leadership competencies and transfer of knowledge and skills to the trainees' ministries and communities. Also, the study assesses the best instructional practices used to deliver instruction to facilitate transfer of skills to the trainees' workplaces. The design of the study was drawn from the diffusion of innovation theory (Rogers, 2003). Methodology consisted of on-site, in-depth interviews and field observations of the skills trainees practiced in their ministries. Findings indicate that mentoring is a fundamental strategy that cultivated both career functions, to carry on leadership duties efficiently, and psychosocial support to improve work performance in mentors and mentees. The mentorship relationship generated a new level of discourse in their ministerial management; they became agents of change, and increased their self-efficacy and personal and professional growth. Using both international and local faculty enhanced instruction and multiple leadership perspectives. The study confirms that on-the-job mentoring programs can be a strategy to encourage women in Kenya to take on leadership positions and can build confidence, self-efficacy and a capacity to respond to complex organizational challenges.
description: Advancing Women in Leadership Journal, Vol. 33 (2013)
Commisioning of a sensitive tune measurement system at SIS-18
Creators: name: Singh, R.
name: Hoffmann, T.
name: Forck, P.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Classification of Non-Supersymmetric Pati-Salam Heterotic String Models
Creators: name: Faraggi, Alon E.
name: Matyas, Viktor G.
name: Percival, Benjamin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend the classification of fermionic $\mathbb{Z}_2\times\mathbb{Z}_2$ heterotic string orbifolds to non--supersymmetric Pati--Salam (PS) models in two classes of vacua, that we dub $\tilde S$--models and $S$--models. The first correspond to compactifications of a tachyonic ten--dimensional vacuum, whereas the second correspond to compactifications of the ten--dimensional tachyon--free $SO(16)\times SO(16)$ heterotic string. In both cases we develop a systematic method to extract tachyon--free four--dimensional models. We show that tachyon--free configurations arise with probability $\sim0.002$ and $\sim0.01$ in the first and second case, respectively. We adapt the `fertility methodology' that facilitates the extraction of phenomenological models. We show that Pati--Salam $\tilde S$--models do not contain heavy Higgs scalar representations that are required to break the PS symmetry to the Standard Model and are therefore not phenomenologically viable. Hence, we argue that in $\tilde S$--models the $SO(10)$ GUT symmetry must be broken at the string scale to the Standard--like Model subgroup. We extract tachyon--free three generation models in both cases that contain an equal number of massless bosonic and fermionic degrees of freedom, ${\it i.e.}$ with $a_{00}=N_b^0-N_f^0=0$, and analyse their one--loop partition function.
description: 37 pages. 5 figures. Standard LaTex. Added Comments
The high-pressure phase diagram of BaNi$_2$As$_2$: unconventional charge-density-waves and structural phase transitions
Creators: name: Lacmann, Tom
name: Haghighirad, Amir-Abbas
name: Souliou, Sofia-Michaela
name: Merz, Michael
name: Garbarino, Gaston
name: Glazyrin, Konstantin
name: Heid, Rolf
name: Tacon, Matthieu Le
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Structural phase transitions accompanied by incommensurate and commensurate charge density wave (CDW) modulations of unconventional nature have been reported in BaNi$_2$As$_2$, a nonmagnetic cousin of the parent compound of Fe-based superconductors, BaFe$_2$As$_2$. The strong dependence of the structural and CDW transitions of BaNi$_2$As$_2$ on isoelectronic substitutions alongside original dynamical lattice effects suggests strong tunability of the electronic phase of the system through structural effects. Here, we present a comprehensive synchrotron x-ray diffraction and first-principles calculation study of the evolution of the crystal structure and lattice instabilities of BaNi$_2$As$_2$ as a function of temperature and hydrostatic pressure (up to 12 GPa). We report a cascade of pressure-induced structural phase transitions and electronic instabilities up to 10 GPa, above which all CDW superstructures disappear. We reveal that the stable high-pressure phase consists of planar Ni zigzag chains, from which the surrounding As atoms have been pushed away. This yields a strong reduction of the interlayer As-As distance (along the original c axis), akin to what is observed in the collapsed tetragonal structure of other pnictides, albeit here with a monoclinic structure. The discovery of polymorphs in the pressure-temperature phase diagram of BaNi$_2$As$_2$ emphasizes the importance of the relative Ni-Ni and Ni-As bond lengths in controlling the electronic ground state of this compound and increases our understanding of viable electronic phases under extreme conditions.
description: 10 pages, 5 figures, 1 table, published version