cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The credibility of news photography in the digital age
Creators: name: Vernon, Mara Evonne
Publisher: name: NaN
Year: 1997

description: Photographers have been manipulating photographs since photography's invention, but digital imaging technology presents photographers with unlimited possibilities. Digital imaging technology allows both simple and complex manipulations to be completed easily and quickly, unlike traditional techniques that are both difficult and time consuming. Additionally, detecting digital manipulation is virtually impossible, jeopardizing photography's referent to the original scene captured through the lens of a photographer's camera; A review of the literature demonstrated a need for research in relation to the media consumer because prior research focused on media practitioners and their tolerance or intolerance for digital manipulation practices. This thesis explores the credibility of news photography in the age of digital manipulation technology as perceived by consumers of mass media. A quasi-experiment was performed to determine if exposure to published examples of digital manipulation, or to a videotaped demonstration of digital manipulation techniques, or to both would affect subjects' perceived levels of the credibility of news photography; Results showed little significant difference between treatment groups, but rather, an agreement among all groups that the credibility of news photography is declining and that digital technology does threaten the credibility of news photography.
How to Write a README
Creators: name: Dadkan, Maisam M.
name: Speed, Garrett
Publisher: name: Zenodo
Year: 2023
Subjects: README
Data management
Data documentation
RDM

description: Readme files are simple documentation files that can be included with data packages and are a way to convey information to yourself and others about your data packages. Documenting your data packages can help you remember where you have placed data, and how you structured data, which can be helpful when revisiting data after a vacation or a few years. In this workshop, we'll show where to find the UU Geosciences faculty README template, how to edit it, and what information to put in README files. In this workshop, we aimed to reach the following learning outcome: Where to save the README file How to create a README file What information to include in a README Learn where to download the UU Geosciences README template How to edit the UU Geosciences README template Why it is important at different research phases (with examples) Introduce different components of the README file Provide them tips and tricks to customize their README files In the presentation, we provided general information about README, its contents, and in which file format it should be created. It was shown how to use Markdown (.md) file format to write stylish README using some examples given in the MarkDown_Writing_tips file. We use an online Markdown editor to show this example. In the second part of the workshop, we showed where the participants can find the README templates of the Faculty of Geoscience and use them for their purposes. In the third part of the workshop, the participants were divided into three groups. Each group received real a README to review and identify what are the missing parts and give suggestions to improve each of them. Each group had up to 5 minutes to explain what they found in README. The READMEs that were used in this part are included in the README.zip file.
Coupling symmetries with Poisson structures
Creators: name: Laurent-Gengoux, Camille
name: Miranda, Eva
Publisher: name: arXiv
Year: 2013
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D17

description: We study local normal forms for completely integrable systems on Poisson manifolds in the presence of additional symmetries. The symmetries that we consider are encoded in actions of compact Lie groups. The existence of Weinstein's splitting theorem for the integrable system is also studied giving some examples in which such a splitting does not exist, i.e. when the integrable system is not, locally, a product of an integrable system on the symplectic leaf and an integrable system on a transversal. The problem of splitting for integrable systems with additional symmetries is also considered.
description: 14 pages
Subhalo abundance and satellite spatial distribution in Milky Way-Andromeda-like paired haloes
Creators: name: Li, Kemeng
name: Shao, Shi
name: He, Ping
name: Gu, Qing
name: Wang, Jie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the subhalo and satellite populations in haloes similar to the Milky Way (MW)-Andromeda paired configuration in the Millennium II and P-Millennium simulations. We find subhaloes are $5\%-15\%$ more abundant in paired haloes than their isolated counterparts that have the same halo mass and large-scale environmental density. Paired haloes tend to reside in a more isotropic environment than isolated haloes, the shear tensor of their large-scale tidal field is possibly responsible for this difference. We also study the thickness of the spatial distribution of the top 11 most massive satellite galaxies obtained in the semi-analytic galaxy sample constructed from the Millennium II simulation. Moreover, satellites that have lost their host subhaloes due to the resolution limit of the simulation have been taken into account. As a result, we find that the difference in the distribution of the satellite thickness between isolated and paired haloes is indistinguishable, which suggests that the paired configuration is not responsible for the observed plane of satellites in the Milky Way. The results in this study indicate the paired configuration could bring some nonnegligible effect on the subhalo abundance in the investigation of the Milky Way's satellite problems.
description: 10 pages, 9 figures
Insight into the structural and magnetotransport properties of epitaxial heterostructures $α$-Fe$_2$O$_3$-Pt(111): Role of the reversed layer sequence
Creators: name: Kozioł-Rachwał, A.
name: Kwiatek, N.
name: Skowroński, W.
name: Grochot, K.
name: Kanak, J.
name: Madej, E.
name: Freindl, K.
name: Korecki, J.
name: Spiridis, N.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the chemical structure and spin Hall magnetoresistance (SMR) in epitaxial $α$-Fe$_2$O$_3$(hematite)(0001)/Pt(111) bilayers with hematite thicknesses of 6 nm and 15 nm grown by molecular beam epitaxy on a MgO(111) substrate. Unlike previous studies that involved Pt overlayers on hematite, the present hematite films were grown on a stable Pt buffer layer and displayed structural changes as a function of thickness. These structural differences (the presence of a ferrimagnetic phase in the thinner film) significantly affected the magnetotransport properties of the bilayers. We observed a sign change of the SMR from positive to negative when the thickness of hematite increased from 6 nm to 15 nm. For $α$-Fe$_2$O$_3$(15 nm)/Pt, we demonstrated room-temperature switching of the Néel order with rectangular, nondecaying switching characteristics. Such structures open the way to extending magnetotransport studies to more complex systems with double asymmetric metal/hematite/Pt interfaces.
Nonlocal response in thin-film waveguides: loss versus nonlocality and breaking of complementarity
Creators: name: Raza, Søren
name: Christensen, Thomas
name: Wubs, Martijn
name: Bozhevolnyi, Sergey I.
name: Mortensen, N. Asger
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the effects of nonlocal response on the surface-plasmon polariton guiding properties of the metal-insulator (MI), metal-insulator-metal (MIM), and insulator-metal-insulator (IMI) waveguides. The nonlocal effects are described by a linearized hydrodynamic model, which includes the Thomas-Fermi internal kinetic energy of the free electrons in the metal. We derive the nonlocal dispersion relations of the three waveguide structures taking into account also retardation and interband effects, and examine the delicate interplay between nonlocal response and absorption losses in the metal. We also show that nonlocality breaks the complementarity of the MIM and IMI waveguides found in the non-retarded limit.
description: 9 pages, 5 figures
Semiclassical Ehrenfest Paths
Creators: name: Liberalquino, Rafael
name: Parisio, Fernando
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Trajectories are a central concept in our understanding of classical phenomena and also in rationalizing quantum mechanical effects. In this work we provide a way to determine semiclassical paths, approximations to quantum averages in phase space, directly from classical trajectories. We avoid the need of intermediate steps, like particular solutions to the Schroedinger equation or numerical integration in phase space by considering the system to be initially in a coherent state and by assuming that its early dynamics is governed by the Heller semiclassical approximation. Our result is valid for short propagation times only, but gives non-trivial information on the quantum-classical transition.
description: To appear in Physics Letters A
Robust dynamic feedback and variable structure adaptive control of rigid and flexible spacecraft
Creators: name: Zeng, Yueming
Publisher: name: NaN
Year: 1997

description: This thesis presents control systems design for control of rigid and flexible spacecraft in the presence of parameter uncertainty and disturbance inputs. Two kinds of control systems are designed for the control of rigid spacecraft. For the design of the first controller, Rodrigues parameters and modified Rodrigues parameters are used to describe the orientation of spacecraft. A dynamic decoupling attitude control law is derived for the tracking of reference attitude trajectories. The singular perturbation theory is used for the stability analysis of the closed-loop system. For the synthesis of the control law, only the attitude error is required. The second control law for rigid spacecraft is derived choosing Euler angles as output variables, and using a similar design procedure as used for the first controller. Finally, based on the variable structure model reference adaptive control (VS-MRAC) theory, a new control system for the control of an orbiting flexible spacecraft is designed. For the derivation of control law, it is assumed that the parameters and the structure of the nonlinear functions in the model are unknown. It is shown that in the closed-loop system including the VS-MRAC system designed using bounds on uncertain functions, the pitch angle tracks given reference trajectory and the vibration is suppressed.
Fractality of certain quantum states
Creators: name: Wojcik, Daniel
name: Zyczkowski, Karol
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mathematical Physics (math-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 28A80, 81Q99

description: We prove the theorem announced in Phys. Rev. Lett. {\bf 85}:5022, 2001 concerning the existence and properties of fractal states for the Schrödinger equation in the infinite one-dimensional well.
description: Latex2e with svjour class. This article belongs to the special issue of Acta Physica Polonica A printed in honor of Professor Iwo Bialynicki-Birula on the occasion of his 90th birthday (Ed. Tomasz Sowinski, DOI:10.12693/APhysPolA.143.S0)
On the design of a secure data warehouse
Creators: name: Wang, Rihui
Publisher: name: NaN
Year: 1997

description: The data warehouse is the combination of subject-oriented, authoritative, integrated databases designed to support the DSS (decision support). Data mining means to extract useful information which is previously unknown from information sources. The topic of data warehousing and data mining encompasses architectures, algorithms and tools for collecting selected data from multiple databases or other information sources into a single repository known as a data warehouse which is structured to facilitate query or analysis in supporting decision making; In this thesis, we will discuss the principles, architecture, and implementation of data warehouses. We will also discuss construction of data mining and some algorithms applied to data mining. We will do some research on the security of data warehouses.
Automatic Detection of Texture Defects Using Texture-Periodicity and Gabor Wavelets
Creators: name: Asha, V.
name: Bhajantri, N. U.
name: Nagabhushan, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.0; I.2.10
subject: 65D19, 65T60, 11K70, 62H30

description: In this paper, we propose a machine vision algorithm for automatically detecting defects in textures belonging to 16 out of 17 wallpaper groups using texture-periodicity and a family of Gabor wavelets. Input defective images are subjected to Gabor wavelet transformation in multi-scales and multi-orientations and a resultant image is obtained in L2 norm. The resultant image is split into several periodic blocks and energy of each block is used as a feature space to automatically identify defective and defect-free blocks using Ward's hierarchical clustering. Experiments on defective fabric images of three major wallpaper groups, namely, pmm, p2 and p4m, show that the proposed method is robust in finding fabric defects without human intervention and can be used for automatic defect detection in fabric industries.
description: 06 Pages, 04 Figures, ICIP 2011
Automatic clustering and feedback in information retrieval
Creators: name: Venkatachaliah, Girish
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: Clustering and feedback have been used in information retrieval to improve the effectiveness of retrieving relevant documents. In this thesis, we investigate the retrieval effectiveness from various document collections in presence of both clustering and feedback. More precisely, we apply a clustering algorithm to an initial run of our queries to choose appropriate clusters for feedback. The clustering and feedback are done automatically.
Cognitive Access Policies under a Primary ARQ process via Forward-Backward Interference Cancellation
Creators: name: Michelusi, Nicolò
name: Popovski, Petar
name: Simeone, Osvaldo
name: Levorato, Marco
name: Zorzi, Michele
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper introduces a novel technique for access by a cognitive Secondary User (SU) using best-effort transmission to a spectrum with an incumbent Primary User (PU), which uses Type-I Hybrid ARQ. The technique leverages the primary ARQ protocol to perform Interference Cancellation (IC) at the SU receiver (SUrx). Two IC mechanisms that work in concert are introduced: Forward IC, where SUrx, after decoding the PU message, cancels its interference in the (possible) following PU retransmissions of the same message, to improve the SU throughput; Backward IC, where SUrx performs IC on previous SU transmissions, whose decoding failed due to severe PU interference. Secondary access policies are designed that determine the secondary access probability in each state of the network so as to maximize the average long-term SU throughput by opportunistically leveraging IC, while causing bounded average long-term PU throughput degradation and SU power expenditure. It is proved that the optimal policy prescribes that the SU prioritizes its access in the states where SUrx knows the PU message, thus enabling IC. An algorithm is provided to optimally allocate additional secondary access opportunities in the states where the PU message is unknown. Numerical results are shown to assess the throughput gain provided by the proposed techniques.
description: 16 pages, 11 figures, 2 tables
Donaldson invariants of symplectic manifolds
Creators: name: Sivek, Steven
Publisher: name: arXiv
Year: 2013
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R17, 57R57

description: We prove that symplectic 4-manifolds with $b_1 = 0$ and $b^+ > 1$ have nonvanishing Donaldson invariants, and that the canonical class is always a basic class. We also characterize in many situations the basic classes of a Lefschetz fibration over the sphere which evaluate maximally on a generic fiber.
description: 21 pages; v2: updated introduction and references
Formation of chondrules in radiative shock waves I. First results, spherical dust particles, stationary shocks
Creators: name: Joham, H.
name: Dorfi, E. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The formation of chondrules in the protoplanetary nebulae causes many questions concerning the formation process, the source of energy for melting the rims, and the composition of the origin material. The aim of this work is to explore the heating of the chondrule in a single precursor as is typical for radiation hydrodynamical shock waves. We take into account the gas-particle friction for the duration of the shock transition and calculate the heat conduction into the chondrules. These processes are located in the protoplanetary nebulae at a region around 2.5 AU, which is considered to be the most likely place of chondrule formation. The present models are a first step towards computing radiative shock waves occurring in a particle-rich environment. We calculated the shock waves using one-dimensional, time-independent equations of radiation hydrodynamics involving realistic gas and dust opacities and gas-particle friction. The evolution of spherical chondrules was followed by solving the heat conduction equation on an adaptive grid. The results for the shock-heating event are consistent with the cosmochemical constraints of chondrule properties. The calculations yield a relative narrow range for density or temperature to meet the requested heating rates of $R > 10^4\,K\, h^{-1}$ as extracted from cosmochemical constraints. Molecular gas, opacities with dust, and a protoplanetary nebula with accretion are necessary requirements for a fast heating process. The thermal structure in the far post-shock region is not fully consistent with experimental constraints on chondrule formation since the models do not include additional molecular cooling processes.
description: 8 pages,5 figures
Quantum superconductor-insulator transition: Implications of BKT-critical behavior
Creators: name: Schneider, T.
name: Weyeneth, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We explore the implications of Berezinskii-Kosterlitz-Thouless (BKT) critical behavior on the two dimensional (2D) quantum superconductor-insulator (QSI) transition driven by the tuning parameter x. Concentrating on the sheet resistance R(x) BKT behavior implies: an explicit quantum scaling function for R(x) along the superconducting branch ending at the nonuniversal critical value R_c=R(x_c); a BKT-transition line T_c(x) that is proportional to (x-x_c)^(z*nu) where z is the dynamic and nu the exponent of the zero temperature correlation length; independent estimates of z*nu, z and nu from the x dependence of the nonuniversal parameters entering the BKT expression for the sheet resistance. To illustrate the potential and the implications of this scenario we analyze data of Bollinger et al. taken on gate voltage tuned epitaxial films of La_(2-x)Sr_xCuO_4 that are one unit cell thick. The resulting estimates z=2.35 and nu=0.63 point to a 2D-QSI critical point where hyperscaling, the proportionality between d/λ^2(0) and T_c, and the correspondence between quantum phase transitions in D and classical ones in (D+z) dimensions are violated and disorder is relevant.
SKILLS ENSURING COACHING EFFECTIVENESS
Creators: name: Nurumbekova, Yarkinay
Publisher: name: Zenodo
Year: 2023

description: This article highlights the components and key elements of effective coaching skills. Interpersonal relationships are a set of relationships that develop between people in the form of feelings, judgments, and addressing each other. In the process of coaching, the main nine skills in interpersonal relations are: skills, leadership, effective communication, psychological safety and trust, emotional intellect, active listening, the ability to express (and receive) feedback, empathy, goal-oriented, sish idea is covered in detail.
Numerical Simulations of Snake Dissipative Solitons in Complex Cubic-Quintic Ginzburg-Landau Equation
Creators: name: Mancas, Stefan C.
name: Khanal, Harihar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Numerical simulations of the complex cubic-quintic Ginzburg-Landau equation (CCQGLE), a canonical equation governing the weakly nonlinear behavior of dissipative systems in a wide variety of disciplines, reveal five entirely novel classes of pulse or solitary waves solutions, viz. pulsating, creeping, snaking, erupting, and chaotical solitons. Here, we develop a theoretical framework for analyzing the full spatio-temporal structure of one class of dissipative solution (snaking soliton) of the CCQGLE using the variational approximation technique and the dynamical systems theory. The qualitative behavior of the snaking soliton is investigated using the numerical simulations of (a) the full nonlinear complex partial differential equation and (b) a system of three ordinary differential equations resulting from the variational approximation.
description: 13 pages, 10 figures. arXiv admin note: substantial text overlap with arXiv:1301.5350
title: Titel
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 46 (2015): KulturGut: aus der Forschung der Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Asteroid Belts in Debris Disk Twins: VEGA and FOMALHAUT
Creators: name: Su, Kate Y. L.
name: Rieke, G. H.
name: Malhotra, R.
name: Stapelfeldt, K. R.
name: Hughes, A. M.
name: Bonsor, A.
name: Wilner, D. J.
name: Balog, Z.
name: Watson, D. M.
name: Werner, M. W.
name: Misselt, K. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Vega and Fomalhaut, are similar in terms of mass, ages, and global debris disk properties; therefore, they are often referred as "debris disk twins". We present Spitzer 10-35 um spectroscopic data centered at both stars, and identify warm, unresolved excess emission in the close vicinity of Vega for the first time. The properties of the warm excess in Vega are further characterized with ancillary photometry in the mid infrared and resolved images in the far-infrared and submillimeter wavelengths. The Vega warm excess shares many similar properties with the one found around Fomalhaut. The emission shortward of ~30 um from both warm components is well described as a blackbody emission of ~170 K. Interestingly, two other systems, eps Eri and HR 8799, also show such an unresolved warm dust using the same approach. These warm components may be analogous to the solar system's zodiacal dust cloud, but of far greater. The dust temperature and tentative detections in the submillimeter suggest the warm excess arises from dust associated with a planetesimal ring located near the water-frost line and presumably created by processes occurring at similar locations in other debris systems as well. We also review the properties of the 2 um hot excess around Vega and Fomalhaut, showing that the dust responsible for the hot excess is not spatially associated with the dust we detected in the warm belt. We suggest it may arise from hot nano grains trapped in the magnetic field of the star. Finally, the separation between the warm and cold belt is rather large with an orbital ratio >~10 in all four systems. In light of the current upper limits on the masses of planetary objects and the large gap, we discuss the possible implications for their underlying planetary architecture, and suggest that multiple, low-mass planets likely reside between the two belts in Vega and Fomalhaut.
description: 14 pages, accepted for publication in ApJ
Use of neural networks to predict Ocr accuracy
Creators: name: Wang, Ying
Publisher: name: NaN
Year: 1997

description: Use of Neural Networks to Predict OCR Accuracy investigates issues in developing an artificial neural network (ANN) based system for prediction of OCR accuracy from the image of a page. This work extends the work of Blando and Gonzalez in the following ways: enlarging training data, proposing new features, comparing different ANN architectures, and introducing a cross-validation learning algorithm; The following experiments were performed: comparison of 14 dimension feature metrics and 7 dimension feature metrics, comparison of an ANN trained with and without cross-validation, comparison of different neural network architectures, comparison of prediction capability of neural network and linear regression, comparison of the prediction capability of neural network using 14 dimension feature metrics and linear regression using reject markers. The results show that neural network can outperform linear regression if properly trained, and that the new feature metrics provide improved predictive ability.
Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts
Creators: name: McIntosh, Scott W.
name: Leamon, Robert J.
name: Gurman, Joseph B.
name: Olive, Jean-Philippe
name: Cirtain, Jonathan W.
name: Hathaway, David H.
name: Burkepile, Joan
name: Miesch, Mark
name: Markel, Robert S.
name: Sitongia, Leonard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Among many other measurable quantities the summer of 2009 saw a considerable low in the radiative output of the Sun that was temporally coincident with the largest cosmic ray flux ever measured at 1AU. A hemispheric asymmetry in magnetic activity is clearly observed and its evolution monitored and the resulting (prolonged) magnetic imbalance must have had a considerable impact on the structure and energetics of the heliosphere. While we cannot uniquely tie the variance and scale of the surface magnetism to the dwindling radiative and particulate output of the star, or the increased cosmic ray flux through the 2009 minimum, the timing of the decline and rapid recovery in early 2010 would appear to inextricably link them. These observations support a picture where the Sun's hemispheres are significantly out of phase with each other. Studying historical sunspot records with this picture in mind shows that the northern hemisphere has been leading since the middle of the last century and that the hemispheric "dominance" has changed twice in the past 130 years. The observations presented give clear cause for concern, especially with respect to our present understanding of the processes that produce the surface magnetism in the (hidden) solar interior - hemispheric asymmetry is the normal state - the strong symmetry shown in 1996 was abnormal. Further, these observations show that the mechanism(s) which create and transport the magnetic flux magnetic flux are slowly changing with time and, it appears, with only loose coupling across the equator such that those asymmetries can persist for a considerable time. As the current asymmetry persists and the basal energetics of the system continue to dwindle we anticipate new radiative and particulate lows coupled with increased cosmic ray fluxes heading into the next solar minimum.
description: Accepted to appear in the ApJ - 44 pages in referee format
Two-colour generation in a chirped seeded Free-Electron Laser
Creators: name: Mahieu, B.
name: Allaria, E.
name: Castronovo, D.
name: Danailov, M. B.
name: Demidovich, A.
name: De Ninno, G.
name: Di Mitri, S.
name: Fawley, W. M.
name: Ferrari, E.
name: Fröhlich, L.
name: Gauthier, D.
name: Giannessi, L.
name: Mahne, N.
name: Penco, G.
name: Raimondi, L.
name: Spampinati, S.
name: Spezzani, C.
name: Svetina, C.
name: Trovò, M .
name: Zangrando, M .
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We present the experimental demonstration of a method for generating two spectrally and temporally separated pulses by an externally seeded, single-pass free-electron laser operating in the extreme-ultraviolet spectral range. Our results, collected on the FERMI@Elettra facility and confirmed by numerical simulations, demonstrate the possibility of controlling both the spectral and temporal features of the generated pulses. A free-electron laser operated in this mode becomes a suitable light source for jitter-free, two-colour pump-probe experiments.
Making Waves Round a Structured Cloak: Lattices, Negative Refraction and Fringes
Creators: name: Colquitt, DJ
name: Jones, IS
name: Movchan, NV
name: Brun, AB Movchan M
name: McPhedran, RC
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Using the framework of transformation optics, this paper presents a detailed analysis of a non-singular square cloak for acoustic, out-of-plane shear elastic, and electromagnetic waves. The generating map is examined in detail and linked to the material properties of the cloak. Analysis of wave propagation through the cloak is presented and accompanied by numerical illustrations. The efficacy of the regularised cloak is demonstrated and an objective numerical measure of the quality of the cloaking effect is provided. It is demonstrated that the cloaking effect persists over a wide range of frequencies. As a demonstration of the effectiveness of the regularised cloak, a Young's double slit experiment is presented. The stability of the interference pattern is examined when a cloaked and uncloaked obstacle are successively placed in front of one of the apertures. This novel link with a well-known quantum mechanical experiment provides an additional method through which the quality of cloaks may be examined. In the second half of the paper, it is shown that an approximate cloak may be constructed using a discrete lattice structure. The geometry and material properties of the lattice are derived from the continuum cloak. The efficiency of the approximate lattice cloak is analysed and a series of illustrative simulations presented. It is demonstrated that effective cloaking may be obtained by using a relatively simple lattice structure, particularly in the low frequency regime.
PEDAGOGICAL FOUNDATIONS OF THE ORGANIZATION OF PROPER MOVEMENT IN EMERGENCY SITUATIONS
Creators: name: Mamadboev, Shokrukh
Publisher: name: Zenodo
Year: 2023

description: Analyzes show that the number of emergency situations in our country is increasing year by year. For example, in 2020-2021, large-scale disasters in our country include the destruction of the Sardoba reservoir, strong winds in the Bukhara region, the worsening of the epidemiological situation in our country, and carbon monoxide poisoning.
EDM Signatures of PeV-scale Superpartners
Creators: name: McKeen, David
name: Pospelov, Maxim
name: Ritz, Adam
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A possible supersymmetric interpretation of the new Higgs-like 126 GeV resonance involves a high sfermion mass scale, from tens of TeV to a PeV or above. This scale provides sufficiently large loop corrections to the Higgs mass and can naturally resolve the constraints from flavor-violating observables, even with a generic flavor structure in the sfermion sector. We point out that such high scales could still generate CP-violating electric dipole moments (EDMs) at interesting levels due to the enhancement of left-right (LR) sfermion mixing. We illustrate this by saturating the light fermion mass corrections from the sfermion threshold, leaving the gaugino masses unconstrained. In this framework, we find that the current EDM bounds probe energy scales of 0.1 PeV or higher; this is competitive with the reach of $ε_K$ and more sensitive than other hadronic and leptonic flavor observables. We also consider the sensitivity to higher dimensional supersymmetric operators in this scenario, including those that lead to proton decay.
description: 7 pages, 3 figures, revtex4-1
Carbon monoxide in the environs of the star WR 16
Creators: name: Duronea, N. U.
name: Arnal, E. M.
name: Bronfman, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze the carbon monoxide emission around the star WR 16 aiming to chieve a better understanding of the interaction between massive stars with their surroundings. We study the molecular gas in a region of 86.'4 x 86.'4 in size using CO (J=1-0) and 13CO (J=1-0) line data obtained with the 4-m NANTEN telescope. Radio continuum archival data at 4.85 GHz, obtained from the Parkes-MIT-NRAO Southern Radio Survey, are also analyzed to account for the ionized gas. Available IRAS (HIRES) 60 and 100 microns images are used to study the characteristics of the dust around the star. Our new CO and 13CO data allow the low/intermediate density molecular gas surrounding the WR nebula to be completely mapped. We report two molecular features at -5 km/s and -8.5 km/s (component 1 and component 2, respectively) having a good morphological resemblance with the Halpha emission of the ring nebula. Component 2 seems to be associated with the external ring, whilst component 1 is placed at the interface between component 2 and the Halpha emission. We also report a third molecular feature 10' in size (component 3) at a velocity of -9.5 km/s having a good morphological correspondence with the inner optical and IR emission, although high resolution observations are recommended to confirm its existence. The stratified morphology and kinematics of the molecular gas could be associated to shock fronts and high mass-loss events related to different evolutive phases of the WR star, which have acted upon the surrounding circumstellar molecular gas. An analysis of the mass of component 1 suggests that this feature is composed by swept-up interstellar gas and is probably enriched by molecular ejecta. The direction of the proper motion of WR 16 suggests that the morphology of the inner ring nebula is induced by the stellar motion.
description: 10 pages, 7 figures. Accepted for publication in A&A
On the origin of the giant SHE in Cu(Bi) alloys
Creators: name: Fedorov, Dmitry V.
name: Herschbach, Christian
name: Ostanin, Sergey
name: Mertig, Ingrid
name: Gradhand, Martin
name: Chadova, Kristina
name: Ködderitzsch, Diemo
name: Ebert, Hubert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two years after the prediction of a giant spin Hall effect for the dilute Cu(Bi) alloy [Gradhand et al., Phys. Rev. B 81, 245109 (2010)], a comparably strong effect was measured in thin films of Cu(Bi) alloys by Niimi et al. [Phys. Rev. Lett. 109, 156602 (2012)]. Both theory and experiment consider the skew-scattering mechanism to be responsible, however they obtain opposite sign for the spin Hall angle. Based on a detailed analysis of existing theoretical results, we explore differences between theory and experiment.
description: 11 pages, 2 figures
Examining student perceptions of the transitional services school counselors provide to college-bound individuals with and without learning disabilities in the areas of self-awareness, self-advocacy, and the law
Creators: name: Wells, Gillian Elisa
Publisher: name: NaN
Year: 1997

description: College-bound students with and without learning disabilities were surveyed, to examine their perceptions of the transitional services provided by school counselors in the areas of self-awareness, self-advocacy, and the law. It appears that both groups are receiving some transitional services. Self-Awareness, self-advocacy, and the law are three components that are not covered by school counselors who work with students. In a majority of cases students cite family and other professionals as the only assistance they receive in these areas.
Dirty-boson physics with magnetic insulators
Creators: name: Zheludev, Andrey
name: Roscilde, Tommaso
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We review recent theoretical and experimental efforts aimed at the investigation of the physics of interacting disordered bosons (so-called dirty bosons) in the context of quantum magnetism. The physics of dirty bosons is relevant to a wide variety of condensed matter systems, encompassing Helium in porous media, granular superconductors and ultracold atoms in disordered optical potentials, to cite a few. Nevertheless, the understanding of the transition from a localized, Bose-glass phase to an ordered, superfluid condensate phase still represents a fundamentally open problem. Still to be constructed is also a quantitative description of the highly inhomogeneous and strongly correlated phases connected by the transition. We discuss how disordered magnetic insulators in a strong magnetic field can provide a well controlled realization of the above transition. Combining numerical simulations with experiments on real materials can shed light on some fundamental properties of the critical behavior, such as the scaling of the critical temperature to condensation close to the quantum critical point.
Geographical Imagination and Experiences of Violence and Violence Prevention in Post-Soviet Space
Creators: name: Zalāns, Kristians
name: Lakševics, Kārlis
name: Mileiko, Ilze
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Institutional actors in urban areas in Latvia are increasingly concerned about reducing violence on multiple scales and temporalities. Imagining such achievements, however, often too easily focuses on the aesthetics of security and infrastructure in public space that obscure the social causes of violence and effects this has on unequal development and social marginalization. Drawing on fieldwork on practices of domestic violence prevention in three Latvian urban areas during the autumn and winter of 2019, this paper examines how the geographical imagination of where violence resides connects violence prevention and spatial development as projects of European modernisation in post-Soviet space. We identify four spatial fields most often associated with violence: (1) neighbourhoods and infrastructural elements, (2) dark and isolated spaces, (3) spaces associated with intoxication, and (4) private spaces. We analyse the most common individual and institutional strategies for violence prevention in each of these fields, noting the logics of dispossession, surveillance, and connectivity behind them. We show how gendered practices and disciplining are emphasised on an individual level, while spatial fixes to violence in public space often focus on men’s violence against men. All in all, we show how violence prevention figures in imagining living in ‘European’ spatial and institutional infrastructural regimes.
Separated Structure Functions for Exclusive $K^+Λ$ and $K^+Σ^0$ Electroproduction at 5.5 GeV with CLAS
Creators: name: Carman, D. S.
name: Park, K.
name: Raue, B. A.
name: Collaboration, CLAS
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report measurements of the exclusive electroproduction of $K^+Λ$ and $K^+Σ^0$ final states from an unpolarized proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions $σ_U$, $σ_{LT}$, $σ_{TT}$, and $σ_{LT'}$ were extracted from the $Φ$-dependent differential cross sections acquired with a longitudinally polarized 5.499 GeV electron beam. The data span a broad range of momentum transfers $Q^2$ from 1.4 to 3.9 GeV$^2$, invariant energy $W$ from threshold to 2.6 GeV, and nearly the full center-of-mass angular range of the kaon. The separated structure functions provide an unprecedented data sample, which in conjunction with other meson photo- and electroproduction data, will help to constrain the higher-level analyses being performed to search for missing baryon resonances.
description: 27 pages, 23 figures
Detection of Nanoparticles with a Frequency Locked Whispering Gallery Mode Microresonator
Creators: name: Swaim, Jon D.
name: Knittel, Joachim
name: Bowen, Warwick P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We detect 39 nm x 10 nm gold nanorods using a microtoroid stabilized via the Pound-Drever-Hall method. Real-time detection is achieved with signal-to-noise ratios up to 12.2. These nanoparticles are a factor of three smaller in volume than any other nanoparticle detected using WGM sensing to date. We show through repeated experiments that the measurements are reliable, and verify the presence of single nanorods on the microtoroid surface using electron microscopy. At our current noise level, the plasmonic enhancement of these nanorods could enable detection of proteins with radii as small as a = 2 nm.
description: 4 pages, 3 figures
The Galactic Center Cloud G0.253+0.016: A Massive Dense Cloud with low Star Formation Potential
Creators: name: Kauffmann, Jens
name: Pillai, Thushara
name: Zhang, Qizhou
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first interferometric molecular line and dust emission maps for the Galactic Center (GC) cloud G0.253+0.016, observed using the Combined Array for Research in Millimeter--wave Astronomy (CARMA) and the Submillimeter Array (SMA). This cloud is very dense, and concentrates a mass exceeding the Orion Molecular Cloud Complex (2x10^5 M_sun) into a radius of only 3pc, but it is essentially starless. G0.253+0.016 therefore violates "star formation laws" presently used to explain trends in galactic and extragalactic star formation by a factor ~45. Our observations show a lack of dense cores of significant mass and density, thus explaining the low star formation activity. Instead, cores with low densities and line widths 1km/s---probably the narrowest lines reported for the GC region to date---are found. Evolution over several 10^5 yr is needed before more massive cores, and possibly an Arches--like stellar cluster, could form. Given the disruptive dynamics of the GC region, and the potentially unbound nature of G0.253+0.016, it is not clear that this evolution will happen.
description: accepted to ApJ Letters; additional outreach material available at https://sites.google.com/site/jenskauffmann/
Dynamics of cluster formation in driven dipolar colloids dispersed on a monolayer
Creators: name: Jäger, Sebastian
name: Stark, Holger
name: Klapp, Sabine H. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report computer simulation results on the cluster formation of dipolar colloidal particles driven by a rotating external field in a quasi-two-dimensional setup. We focus on the interplay between permanent dipolar and hydrodynamic interactions and its influence on the dynamic behavior of the particles. This includes their individual as well as their collective motion. To investigate these characteristics, we employ Brownian dynamics simulations of a finite system with and without hydrodynamic interactions. Our results indicate that particularly the translation-rotation coupling from the hydrodynamic interactions has a profound impact on the clustering behavior.
description: 15 pages, 7 figures
Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID
Creators: name: Nagel, J.
name: Buchter, A.
name: Xue, F.
name: Kieler, O. F.
name: Weimann, T.
name: Kohlmann, J.
name: Zorin, A. B.
name: Rüffer, D.
name: Russo-Averchi, E.
name: Huber, R.
name: Berberich, P.
name: Morral, A. Fontcuberta i
name: Grundler, D.
name: Kleiner, R.
name: Koelle, D.
name: Poggio, M.
name: Kemmler, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Nanoscale magnets might form the building blocks of next generation memories. To explore their functionality, magnetic sensing at the nanoscale is key. We present a multifunctional combination of a scanning nanometer-sized superconducting quantum interference device (nanoSQUID) and a Ni nanotube attached to an ultrasoft cantilever as a magnetic tip. We map out and analyze the magnetic coupling between the Ni tube and the Nb nanoSQUID, demonstrate imaging of an Abrikosov vortex trapped in the SQUID structure - which is important in ruling out spurious magnetic signals - and reveal the high potential of the nanoSQUID as an ultrasensitive displacement detector. Our results open a new avenue for fundamental studies of nanoscale magnetism and superconductivity.
description: 7 pages, 5 figures
ПАХТА ХОМ АШЁСИНИ ҚУРИТИШ ДАВОМИЙЛИГИНИ БАРАБАН ИЧИГА ҚУРИТИШ АГЕНТИНИ РАДИАЛ КИРИТИШ МИҚДОРИГА БОҒЛИҚЛИГИНИ ЎРГАНИШ НАТИЖАЛАРИ
Creators: name: Каримбаев, Д.Р.
Publisher: name: Zenodo
Year: 2023

description: пахта хом ашёсини қуритиш давомийлигини барабан ичига қуритиш агентини радиал киритиш миқдорига боғлиқлигини ўрганиш натижалари келтирилган бўлиб, энг қулай усулларини янгилик асосида тақдим этилган.
Electronic excitations of magnetic impurity state in diluted magnetic semiconductor (Ga,Mn)As
Creators: name: Kobayashi, M.
name: Niwa, H.
name: Takeda, Y.
name: Fujimori, A.
name: Senba, Y.
name: Ohashi, H.
name: Tanaka, A.
name: Ohya, S.
name: Hai, P. N.
name: Tanaka, M.
name: Harada, Y.
name: Oshima, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structure of doped Mn in (Ga,Mn)As is studied by resonant inelastic X-ray scattering (RIXS). From configuration-interaction cluster-model calculations, the line shapes of the Mn $L_3$ RIXS spectra can be explained by $d$-$d$ excitations from the Mn$^{3+}$ ground state, dominated by charge-transferred states, rather than a Mn$^{2+}$ ground state. Unlike archetypical $d$-$d$ excitation, the peak widths are broader than the experimental energy resolution. We attribute the broadening to a finite lifetime of the $d$-$d$ excitations, which decay rapidly to electron-hole pairs in the host valence and conduction bands through hybridization of the Mn $3d$ orbital with the ligand band.
description: 5 pages, 3 figures