cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Contouring: women, walking and art
Creators: name: Lloyd, Alison
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 199999 Studies in the Creative Arts and Writing not elsewhere classified
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: This practice-led thesis on women, walking and art combines a critical, analytical discussion of women artists of the 1960s, 70s and early 80s with a reflective evaluation of the emergence of walkingin my art practice. It was driven initially by my experience as an art practitioner and recreational hill walker, and from art literature which foregrounds historical walking practices, largely within the field of postmodern sculpture. My primary research question asks, ‘How have women artists used walking as artistic methods and processes?’ This enabled me to develop a case study in which I discuss walking as an unacknowledged aspect of work by Marie Yates, Michelle Stuart and Nancy Holt, whose work is usually situated within the Conceptual art movement. [Continues.]
Entrepreneurial health and wellbeing in the digital economy: an intersectional critical realist investigation
Creators: name: Adaku Agwunobi
Publisher: name: Loughborough University
Year: 2020
Subjects: Uncategorized

description: This doctoral thesis examines the health and well-being of marginalised entrepreneurs, such as Black women, in the digital economy, using an explanatory sequential transformative mixed-methods approach and intersectionality as a theoretical lens. Hence, the study aims to determine the role that intersectionality plays in the health and well-being of entrepreneurs. The study is underpinned with critical realist philosophy particularly the focus on ontology. Building on existing work on perceived discrimination and health, this research examines a magnitude of constructs specific to marginalised individuals. The existing literature shows both positive and negative aspects of entrepreneurship, yet not much investigation has been done through qualitative inquiries. Based on a review of the literature on entrepreneurship, well-being and inequality, an online survey was distributed to entrepreneurs (N=126); this was followed by semi-structured interviews (N=20), encompassing a qualitative priority and resulting in the identification of five key broad themes: physical health, mental health, digital well-being, perception and the side hustle. Subsequently, these consisted of sub-themes including micro-aggressions, whitewashing, cyberbullying, stereotyping and stigma within the sample set. Thus, this thesis explores not only the mental health aspects of entrepreneurship but also the physical and physiological effects of stress, framed by using a biopsychosocial model for the marginalised entrepreneurs in the sample. Analysis of the responses demonstrates that overworking, perfectionism, social media dependency and comparison are associated with lower well-being. Additionally, anxiety, burnout, hypertension and sleep disturbances were identified as adverse health outcomes of entrepreneurship, accentuated by the digital economy and low self-esteem. Furthermore, the analysis shows that there is a strong correlation between entrepreneurship and stress, and investigation of the qualitative data helps to explain these findings. The overall results indicate that entrepreneurship has a negative effect on the mental and physical health of intersectional entrepreneurs due to perceived discrimination. On this basis, it is recommended that future research continue to include diverse sample sets in order to contribute to positive change and support for these groups consistent with transformative frameworks. Lastly, the findings in this thesis will help in shaping policy; recommendations are offered for strategies that entrepreneurs can adopt to improve their well-being. The thesis has contributed to the literature in the field of entrepreneurship and well-being, with considerations of intersectionality, namely race, gender, age and class, taken into account.
Technology strategies in converging technology systems: Evidence from printed electronics
Creators: name: Wambsganss, Annika
name: Bröring, Stefanie
name: Salomo, Søren
name: Sick, Nathalie
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::650 Management, Öffentlichkeitsarbeit::650 Management und unterstützende Tätigkeiten
subject: complex technology system
subject: technology convergence
subject: technology strategy
subject: technology system coverage

description: Novel technology systems, such as “fiber optics” and “printed electronics,” increasingly emerge at the interface of hitherto unrelated technology areas. As such, new technology systems often arise through technology convergence, characterized by integrating technology components and knowledge from different technology systems, resulting in a novel system architecture. This phenomenon is of utmost societal relevancy but simultaneously poses tremendous challenges for firms' technology strategies. Firms must not only cope with unrelated knowledge rooted in hitherto different technologies but also have to decide deliberately how systemic (i.e., complete technology system) versus focused (i.e., single component of the technology system) their engagement in technology development in the converging technology system ought to be. In addition, firms need to decide strategically to what extent to develop specialized or design knowledge. Extant concepts of technology strategy fall short of capturing this complexity inherent in converging technology systems. Therefore, to address how technology strategies co-evolve along with the emergence of new technology systems, this study adds a systems perspective to technology strategy by developing the concept of technology system coverage. This novel dimension of technology strategy is formed by the scope (i.e., focused vs. systemic coverage of the technology system) and type of technological knowledge (i.e., specialized or design knowledge). We empirically apply this novel angle of technology strategy to the convergence field of printed electronics. Based on a longitudinal set of 828 patents over 30 years, 74 relevant corporate actors are identified. The underlying taxonomy enables us to reveal four technology strategies and develop five propositions. The results indicate that all firms build design knowledge over time, whereas not all firms build specialized knowledge, no matter what technology strategy is pursued. In sum, this work advances literature by understanding technology strategy in emerging complex technology systems, introducing a systems perspective.
title: Barium Strontium Titanate Thick-Films : Dependency between Dielectric Performance and their Morphology
Creators: name: Giere, A.
name: Zhou, Xiandong
name: Paul, F.
name: Sazegar, Mohsen
name: Zheng, Yuliang
name: Maune, Holger
name: Binder, J. R.
name: Jakoby, Rolf
Publisher: name: De Gruyter
Year: 2008

description: The paper is focused on the influence of the morphology of barium strontium titanate (BST) thick-films on their effective dielectric properties. Therefore two BST thick-films are made with a minor deviation in sinter temperature, and hence their mean grain size of the films and their sintering necks. By modeling the meso-structure using a Nonlinear 3D Finite-Difference Time-Domain field solver the assumed effect of the morphology on the effective dielectric properties are confirmed. The simulation results show the potential for a further improvement of the dielectric tunability of BST thick-films.
System Response Kernel Calculation for List-mode Reconstruction in Strip PET Detector
Creators: name: Białas, P.
name: Kowal, J.
name: Strzelecki, A.
name: Bednarski, T.
name: Czerwiński, E.
name: Kapłon, Ł.
name: Kochanowski, A.
name: Korcyl, G.
name: Kowalski, P.
name: Kozik, T.
name: Krzemień, W.
name: Molenda, M.
name: Moskal, P.
name: Niedźwiecki, Sz.
name: Pałka, M.
name: Pawlik, M.
name: Raczyński, L.
name: Rudy, Z.
name: Salabura, P.
name: Sharma, N. G.
name: Silarski, M.
name: Słomski, A.
name: Smyrski, J.
name: Wiślicki, W.
name: Zieliński, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Medical Physics (physics.med-ph)
subject: Nuclear Theory (nucl-th)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Reconstruction of the image in Positron Emission Tomographs (PET) requires the knowledge of the system response kernel which describes the contribution of each pixel (voxel) to each tube of response (TOR). This is especially important in list-mode reconstruction systems, where an efficient analytical approximation of such function is required. In this contribution, we present a derivation of the system response kernel for a novel 2D strip PET.
description: 10 pages, 2 figures; Presented at Symposium on applied nuclear physics and innovative technologies, Cracow, 03-06 June 2013
Solar Light Driven H2O2 Production and Selective Oxidations Using a Covalent Organic Framework Photocatalyst Prepared by a Multicomponent Reaction
Creators: name: Das, Prasenjit
name: Roeser, Jérôme
name: Thomas, Arne
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
subject: covalent organic frameworks
subject: H2O2 production
subject: multicomponent reactions
subject: photocatalysis
subject: size-selective catalyst

description: A chemically stable 2D microporous COF (PMCR-1) was synthesized via the multicomponent Povarov reaction. PMCR-1 exhibits a remarkable and long-term stable photocatalytic H2O2 production rate (60 h) from pure and sea water under visible light. The H2O2 production is markedly enhanced when benzyl alcohol (BA) is added as reductant, which is also due to a strong π–π interaction of BA with dangling phenyl moieties in the COF pores introduced by the multicomponent Povarov reaction. Motivated by the concomitant BA oxidation to benzaldehyde during H2O2 formation, the photocatalytic oxidation of various organic substrates such as benzyl amine and methyl sulfide derivatives was investigated. It is shown that the well-defined micropores of PMCR-1 enable size-selective photocatalytic oxidation.
In Situ Coupling of Carbon Dots with Co‐ZIF Nanoarrays Enabling Highly Efficient Oxygen Evolution Electrocatalysis
Creators: name: Hong, Qiang
name: Wang, Yingming
name: Wang, Ruirui
name: Chen, Ziliang
name: Yang, Hongyuan
name: Yu, Kai
name: Liu, Yang
name: Huang, Hui
name: Kang, Zhenhui
name: Menezes, Prashanth W.
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
subject: carbon dots
subject: coupled nanoarrays
subject: electrocatalyst
subject: metal‐organic framework
subject: oxygen evolution reaction

description: Metal-organic frameworks (MOFs) are regarded as one promising class of precatalysts for electrocatalytic oxygen evolution reaction (OER), yet most of them suffer from poor conductivity and lack of coordinatively unsaturated metal sites, which hinders the fast electrochemical reconstruction and thus a poor OER activity. To address this issue, a unique heterocomposite has been constructed by in situ inserting carbon dots (CDs) into cobalt-based zeolitic imidazolate framework (Co-ZIF) nanosheet arrays (Co-ZIF/CDs/CC) in the presence of carbon cloth (CC) via one-pot coprecipitation for alkaline OER. Benefiting from the synergism between CDs and Co-ZIF subunits such as superior conductivity, strong charge interaction as well as abundant metal sites exposure, the Co-ZIF/CDs/CC exhibits an enhanced promotion effect for OER and contributes to the deep phase transformation from CDs-coupled Co-ZIF to CDs-coupled active CoOOH. As expected, the achieved Co-ZIF/CDs/CC only requires an overpotential of 226 mV to deliver 10 mA cm−2 in 1.0 M KOH, which is lower than that of Co-ZIF/CC and superior to most previously reported CC-supported MOF precatalysts. Moreover, it can also maintain a large current density of 100 mA cm−2 for 24 h with negligible activity decay.
title: Investigating the challenges that face refugee students in Newfoundland and Labrador - an educators' perspective
Creators: name: Flight, Garrett
Publisher: name: Memorial University of Newfoundland
Year: 2022

description: Using a series of semi-structured interviews to gather data, educators were asked to explore the struggles that refugee students face, explain how the current system is effective and ineffectual, and make recommendations for good teaching practices with this at-risk demographic. Extracted from twelve interviews from these educators, who all have experience teaching refugee students, were obstacles that are identified by three classifications: academic, social, and emotional. Hindrances and successes in the current refugee education model have been identified from the perspective of educators. Lastly, the study makes recommendations to improve the educational experience for all stakeholders and to create an environment where refugee students can overcome the massive challenges that they encounter. The participants teach and administrate from Grades 7-12 and have a vast range of experience. Results of the study were robust and many themes came from the data. These include recommendations of investing more resources (i.e. teacher allocation and training), building strong student-teacher relationships at a school wide level, participating in trauma informed practice, and implementing early intervention for students who arrive under the age of Grade 7.
A Multi-epoch Timing and Spectral Study of the Ultraluminous X-Ray Source NGC 5408 X-1 with XMM-Newton
Creators: name: Pasham, Dheeraj R.
name: Strohmayer, Tod E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present results of new XMM-Newton observations of the ultraluminous X-ray source (ULX) NGC 5408 X-1, one of the few ULXs to show quasi-periodic oscillations (QPO). We detect QPOs in each of four new (~ 100 ks) pointings, expanding the range of frequencies observed from 10 - 40 mHz. We compare our results with the timing and spectral correlations seen in stellar-mass black hole systems, and find that the qualitative nature of the timing and spectral behavior of NGC 5408 X-1 is similar to systems in the steep power-law state exhibiting Type-C QPOs. However, in order for this analogy to quantitatively hold we must only be seeing the so-called saturated portion of the QPO frequency - photon index (or disk flux) relation. Assuming this to be the case, we place a lower limit on the mass of NGC 5408 X-1 of > 800 solar masses. Alternatively, the QPO frequency is largely independent of the spectral parameters, in which case a close analogy with the Type-C QPOs in stellar systems is problematic. Measurement of the source's timing properties over a wider range of energy spectral index is needed to definitively resolve this ambiguity. We searched all the available data for both a broad Fe emission line as well as high frequency QPO analogs (0.1 - 1 Hz), but detected neither. We place upper limits on the equivalent width of any Fe emission feature in the 6 - 7 keV band, and of the amplitude (rms) of a high frequency QPO analog of approximately 10 eV and approximately 4%, respectively.
description: Published in ApJ
title: [Quaestiones secundum Johannem Buridanum]
title: (1r) [Quaestiones Wiennenses secundum Johannem Buri-danum super libros Ethicorum Aristotelis I-V].
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2022

description: Datierung nach Wasserzeichen (Piccard VII 2203)
Are Deterministic Descriptions And Indeterministic Descriptions Observationally Equivalent?
Creators: name: Werndl, Charlotte
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: Classical Physics (physics.class-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The central question of this paper is: are deterministic and indeterministic descriptions observationally equivalent in the sense that they give the same predictions? I tackle this question for measure-theoretic deterministic systems and stochastic processes, both of which are ubiquitous in science. I first show that for many measure-theoretic deterministic systems there is a stochastic process which is observationally equivalent to the deterministic system. Conversely, I show that for all stochastic processes there is a measure-theoretic deterministic system which is observationally equivalent to the stochastic process. Still, one might guess that the measure-theoretic deterministic systems which are observationally equivalent to stochastic processes used in science do not include any deterministic systems used in science. I argue that this is not so because deterministic systems used in science even give rise to Bernoulli processes. Despite this, one might guess that measure-theoretic deterministic systems used in science cannot give the same predictions at every observation level as stochastic processes used in science. By proving results in ergodic theory, I show that also this guess is misguided: there are several deterministic systems used in science which give the same predictions at every observation level as Markov processes. All these results show that measure-theoretic deterministic systems and stochastic processes are observationally equivalent more often than one might perhaps expect. Furthermore, I criticise the claims of the previous philosophy papers Suppes (1993, 1999), Suppes and de Barros (1996) and Winnie (1998) on observational equivalence.
Galactic Kinematics from a Sample of Young Massive Stars
Creators: name: Bobylev, V. V.
name: Bajkova, A. T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Based on published sources, we have created a kinematic database on 220 massive (>10 solar masses) young Galactic star systems located within <3 kpc of the Sun. Out of them, approximately 100 objects are spectroscopic binary and multiple star systems whose components are massive OB stars; the remaining objects are massive Hipparcos B stars with parallax errors of no more than 10 percent. Based on the entire sample, we have constructed the Galactic rotation curve, determined the circular rotation velocity of the solar neighborhood around the Galactic center at Ro=8 kpc, Vo=259+-16 km/s, and obtained the following spiral density wave parameters: the amplitudes of the radial and azimuthal velocity perturbations f_R=-10.8+/-1.2 km/s, and f_θ=7.9+/-1.3 km/s, respectively; the pitch angle for a two-armed spiral pattern i=-6.0+/-0.4 deg., with the wavelength of the spiral density wave near the Sun being 2.6+/-0.2 kpc; and the radial phase of the Sun in the spiral density wave -120+/-4 deg. We show that such peculiarities of the Gould Belt as the local expansion of the system, the velocity ellipsoid vertex deviation, and the significant additional rotation can be explained in terms of the density wave theory. All these effects decrease noticeably once the influence of the spiral density wave on the velocities of nearby stars has been taken into account. The influence of Gould Belt stars on the Galactic parameter estimates has also been revealed. Eliminating them from the kinematic equations has led to the following new values of the spiral density wave parameters: f_θ=2.9+/-2.1 km/s and χ_\odot=-104+/-6 deg.
description: 25 pages, 9 figures, 3 tables
The GALEX Arecibo SDSS Survey. VIII. Final Data Release -- The Effect of Group Environment on the Gas Content of Massive Galaxies
Creators: name: Catinella, Barbara
name: Schiminovich, David
name: Cortese, Luca
name: Fabello, Silvia
name: Hummels, Cameron B.
name: Moran, Sean M.
name: Lemonias, Jenna J.
name: Cooper, Andrew P.
name: Wu, Ronin
name: Heckman, Timothy M.
name: Wang, Jing
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the final data release from the GALEX Arecibo SDSS Survey (GASS), a large Arecibo program that measured the HI properties for an unbiased sample of ~800 galaxies with stellar masses greater than 10^10 Msun and redshifts 0.025
description: 36 pages, 16 figures. Accepted for publication in MNRAS. Version with supplementary material available at http://www.mpa-garching.mpg.de/GASS/pubs.php . GASS released data can be found at http://www.mpa-garching.mpg.de/GASS/data.php
title: Characterization of Acoustic Effects in Ferroelectric Thin-Films for Microwave Components
Creators: name: Giere, A.
name: Schafranek, Robert
name: Zheng, Yuliang
name: Maune, Holger
name: Sazegar, Mohsen
name: Jakoby, Rolf
name: Klein, Anja
Publisher: name: De Gruyter
Year: 2008

description: In this paper we present the impact of acoustic resonances excited by electrostriction in BST thin-films on the Q-factor of a varactor in the GHz range. By changing the process-parameter substrate to target distance while sputtering the thin-films, we observe a change in the acoustic resonance frequencies. To characterize the material properties which determine the acoustic resonance frequencies a model based on a 1D acoustic transmission line is used. The extracted material properties results in a proportional dependency to the changed process parameter. For verification of the acoustic transmission line model 3D simulations have been performed which show good agreement to the line model for lower resonance frequencies, where the difference at higher frequencies becomes significant due to additional higher order modes.
Representation of Classical Solutions to a Linear Wave Equation with Pure Delay
Creators: name: Khusainov, Denys
name: Pokojovy, Michael
name: Azizbayov, Elvin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: For a wave equation with pure delay, we study an inhomogeneous initial-boundary value problem in a bounded 1D domain. Under smoothness assumptions, we prove unique existence of classical solutions for any given finite time horizon and give their explicit representation. Continuous dependence on the data in a weak extrapolated norm is also shown.
description: 11 pages, 1 figure
Edge Couplers with relaxed Alignment Tolerance for Pick-and-Place Hybrid Integration of III-V Lasers with SOI Waveguides
Creators: name: Romero-García, Sebastian
name: Marzban, Bahareh
name: Merget, Florian
name: Shen, Bin
name: Witzens, Jeremy
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on two edge-coupling and power splitting devices for hybrid integration of III-V lasers with sub-micrometric silicon-on-insulator (SOI) waveguides. The proposed devices relax the horizontal alignment tolerances required to achieve high coupling efficiencies and are suitable for passively aligned assembly with pick-and-place tools. Light is coupled to two on-chip single mode SOI waveguides with almost identical power coupling efficiency, but with a varying relative phase accommodating the lateral misalignment between the laser diode and the coupling devices, and is suitable for the implementation of parallel optics transmitters. Experimental characterization with both a lensed fiber and a Fabry-Pérot semiconductor laser diode has been performed. Excess insertion losses (in addition to the 3 dB splitting) taken as the worst case over both waveguides of respectively 2 dB and 3.1 dB, as well as excellent 1 dB horizontal loss misalignment ranges of respectively 2.8 um and 3.8 um (worst case over both in-plane axes) have been measured for the two devices. Back-reflections to the laser are below -20 dB for both devices within the 1 dB misalignment range. Devices were fabricated with 193 nm DUV optical lithography and are compatible with mass-manufacturing with mainstream CMOS technology.
Study of resonant inelastic light scattering in Keldysh-Schwinger functional integral formalism
Creators: name: Lee, Hyun C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The scattering cross section of the resonant inelastic light scattering is represented as a correlation function in the Keldysh-Schwinger functional integral formalism. The functional integral approach enables us to compute the cross section in the Feynman diagram perturbation theory where many-body effects can be fully incorporated. This approach is applied to the one G-phonon Raman scattering of graphene, and the result is shown to agree with the one previously obtained by the conventional Fermi golden rule formula. Also, this approach is generalized to the systems in non-equilibrium conditions.
description: 21 pages. 6 figures. To appear in New Journal of Physics
Nuclear Pasta Formation
Creators: name: Schneider, A. S.
name: Horowitz, C. J.
name: Hughto, J.
name: Berry, D. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The formation of complex nonuniform phases of nuclear matter, known as nuclear pasta, is studied with molecular dynamics simulations containing 51200 nucleons. A phenomenological nuclear interaction is used that reproduces the saturation binding energy and density of nuclear matter. Systems are prepared at an initial density of 0.10fm$^{-3}$ and then the density is decreased by expanding the simulation volume at different rates to densities of 0.01 fm$^{-3}$ or less. An originally uniform system of nuclear matter is observed to form spherical bubbles ("swiss cheese"), hollow tubes, flat plates ("lasagna"), thin rods ("spaghetti") and, finally, nearly spherical nuclei with decreasing density. We explicitly observe nucleation mechanisms, with decreasing density, for these different pasta phase transitions. Topological quantities known as Minkowski functionals are obtained to characterize the pasta shapes. Different pasta shapes are observed depending on the expansion rate. This indicates non equilibrium effects. We use this to determine the best ways to obtain lower energy states of the pasta system from MD simulations and to place constrains on the equilibration time of the system.
description: 14 pages, 8 figures
Detection of Heavy Metal Contaminants in Water and the Environment
Creators: name: Hitaishi, Prashant
name: Verma, Rohit
name: Khurana, Parul
name: Thatai, Sheenam
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: Science Policy

description: A simple and highly sensitive plasmonic colorimetric method using nanomaterials is reviewed to detect heavy metal ions in aqueous samples. The basic properties of nanomaterials, which make them behave differently from their bulk counterpart is addressed. The main focus is on the potential applications of intelligent materials like metal NPs and core-shell nanocomposites for the sensing of heavy metal ions in an aqueous media and environment. The article also presents an overview of the science and technology behind nanoparticle-based sensors in general and core-shell sensors in particular. This article embodies an overview of the exciting and emerging field of sensors with an emphasis on metal nanoparticles and core-shell nanocomposites.
On the Nature of the mHz X-Ray Quasi-periodic Oscillations from Ultraluminous X-Ray Source M82 X-1: Search for Timing-Spectral Correlations
Creators: name: Pasham, Dheeraj R.
name: Strohmayer, Tod E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using all the archival XMM-Newton X-ray (3-10 keV) observations of the ultraluminous X-ray source (ULX) M82 X-1 we searched for a correlation between its variable mHz quasi-periodic oscillation (QPO) frequency and its hardness ratio (5-10 keV/3-5 keV), an indicator of the energy spectral power-law index. When stellar-mass black holes (StMBHs) exhibit Type-C low-frequency QPOs (~ 0.2-15 Hz) the centroid frequency of the QPO is known to correlate with the energy spectral index. The detection of such a correlation would strengthen the identification of M82 X-1's mHz QPOs as Type-C and enable a more reliable mass estimate by scaling its QPO frequencies to those of Type-C QPOs in StMBHs of known mass. We resolved the count rates and the hardness ratios of M82 X-1 and a nearby bright ULX (source 5/X42.3+59) through surface brightness modeling. We detected QPOs in the frequency range of 36-210 mHz during which M82 X-1's hardness ratio varied from 0.42-0.47. Our primary results are: (1) we do not detect any correlation between the mHz QPO frequency and the hardness ratio (a substitute for the energy spectral power-law index) and (2) similar to some accreting X-ray binaries, we find that M82 X-1's mHz QPO frequency increases with its X-ray count rate (Pearson's correlation coefficient = +0.97). The apparent lack of a correlation between the QPO centroid frequency and the hardness ratio poses a challenge to the earlier claims that the mHz QPOs of M82 X-1 are the analogs of the Type-C low-frequency QPOs of StMBHs. On the other hand, it is possible that the observed relation between the hardness ratio and the QPO frequency represents the saturated portion of the correlation seen in Type-C QPOs of StMBHs -- in which case M82 X-1's mHz QPOs can still be analogous to Type-C QPOs.
description: Published in ApJ
Oxygen-vacancy clustering and pseudogap behaviour at LaAlO3/SrTiO3 interface
Creators: name: Mohanta, N.
name: Taraphder, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The 2DEG at the LaAlO3/SrTiO3 interface promises to add a new dimension to emerging electronic devices due to its high tunability. Defects in the form of Oxygen vacancies in titanate surfaces and interfaces, on the other hand, play a key role in the emergence of novel phases. Based on an effective model, we study the influence of Oxygen vacancies on superconductivity and ferromagnetism at LaAlO3/SrTiO3 interface. Using the Bogoliubov-de Gennes formulation in conjunction with Monte-Carlo simulation, we find a clustering of the Oxygen vacancies at the interface that favours formation of coexisting ferromagnetic puddles spatially separated from superconductivity. We also find a carrier freeze-out at low temperatures, observed experimentally in wide-variety of samples. Sufficiently large amount of Oxygen vacancy leads to pseudo-gap like behaviour in the superconducting state.
description: 5 pages, 5 figures
On Stability of Hyperbolic Thermoelastic Reissner-Mindlin-Timoshenko Plates
Creators: name: Pokojovy, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L55, 35Q74, 74D05, 93D15, 93D20

description: In the present article, we consider a thermoelastic plate of Reissner-Mindlin-Timoshenko type with the hyperbolic heat conduction arising from Cattaneo's law. In the absense of any additional mechanical dissipations, the system is often not even strongly stable unless restricted to the rotationally symmetric case, etc. We present a well-posedness result for the linear problem under general mixed boundary conditions for the elastic and thermal parts. For the case of a clamped, thermally isolated plate, we show an exponential energy decay rate under a full damping for all elastic variables. Restricting the problem to the rotationally symmetric case, we further prove that a single frictional damping merely for the bending compoment is sufficient for exponential stability. To this end, we construct a Lyapunov functional incorporating the Bogovskiĭ operator for irrotational vector fields which we discuss in the appendix.
description: 27 pages
"We are not racist, but we do not want immigrants". How Italy uses immigration law to marginalize immigrants and create a (new) national identity
Creators: name: Faedda, Barbara
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Law
subject: FOS: Law
subject: History

description: This chapter analyzes Italian immigration policy and immigration law, giving special attention to the political discourse that keeps forcing immigration to the top of the institutional policy agenda. In this body of discourse, immigration is criminalized and foreign-ness becomes synonymous with criminality. Italian political parties have reinforced this association between crime and immigration to keep a firm grip on the electorate in a climate of political instability. This chapter examines several aspects of this political strategy. It also observes that institutional approaches to immigration have not changed substantially over the past three decades. Most governments, whether conservative or progressive, have governed immigration through an axiomatic that relegates immigration policy to a constant state of emergency that associates immigration with criminality.
Entanglement Purification with the Exchange Interaction
Creators: name: Auer, Adrian
name: Burkard, Guido
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Entanglement purification allows the creation of qubit pairs of arbitrarily high fidelity with respect to a maximally entangled state, starting from a larger number of low-fidelity pairs. Purification requires quantum memory, a role for which electron spins are well suited. However, using existing recurrence protocols involving symmetric local two-qubit operations for spin qubits turns out to be rather unpractical. We present an efficient purification protocol requiring only a single pulsed Heisenberg- or XY-type exchange interaction between two qubit pairs. In contrast to known protocols, we allow for asymmetric bilateral two-qubit operations where the two communication parties operate differently on their qubits. In the optimal version of our protocol, the local two-qubit interactions in the case of Heisenberg exchange correspond to the $\sqrt{\mathrm{SWAP}}$ gate and its inverse.
description: 5 pages, 3 figures
Development and Validation of Rapid, Timesaving, and Cost-effective UHPLC Method for Simultaneous Quantification of Cinnarizine, its Five Specified Impurities, Two Degradation Products and Two Antioxidants
Creators: name: Mhaske, Deepak Krishna
name: Kumbhar, Arjun Shankar
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: This article explains the developed and validated rapid, timesaving, and cost-effective UHPLC method for simultaneous quantification of cinnarizine, its five specified impurities (Impurity-A to E), two degradation products (cinnamyl piperazine and benzhydrol), and two antioxidants (methylparaben and propylparaben). Furthermore, when coupled with a mass spectrometer, the proposed method provides additional advantages for confirmation of results and correct identification based on molecular weight. All analytes were eluted within 15 minutes on an ACQUITY, UPLC, BEH C18 (150 mm x 2.1 mm, 1.7 µm) column at 40.0°C by using two mobile phases containing different compositions of 10 mM ammonium acetate, acetonitrile, and acetic acid in gradient elution mode. The linearity curves of cinnarizine, its impurities, and degradation products showed good results in a correlation coefficient of 0.999 with a lower detection limit (0.1125 μg/ mL) and quantification limit (0.1875 μg/mL) at 230 nm. A forced degradation study on spiked and unspiked solutions proved their specificity with improvements and their significance. This proposed method involves a lower flow rate (0.35 mL/min.) with a shorter run time, which provides faster analysis, reduces wastage, reduces the cost, and specifies the greener advantages. The outcome of the validation as per ICH guidelines proved that the proposed UHPLC method is accurate, precise, and timesaving for simultaneous quantification of all analytes in active pharmaceutical ingredient, tablets, capsules, and oral suspension of cinnarizine.
Redefining Full-Time in College: Evidence on 15-Credit Strategies
Creators: name: Klempin, Serena Constance
Publisher: name: Columbia University
Year: 2014
Subjects: Community college students--Education
Community colleges

description: To complete an associate degree in four terms or a bachelor’s degree in eight, students must enroll in at least 15 credits per semester, yet relatively few students actually take 15 credits, often enrolling in 12 credits (or fewer), which colleges typically consider to be “full-time.” To increase rates of on-time completion,  a number of  states and higher education advocacy groups advocate defining full-time as 15 credits, and a growing number of institutions are implementing policies based on such a definition.
This report provides an overview of three distinct types of 15-credit strategies being used nationally—financial incentives, social marketing, and structural reforms. It reviews the research evidence on their effectiveness and outlines their potential challenges and unintended consequences. The report also identifies three types of additional policies that are designed to promote higher intensity enrollment without focusing exclusively on 15 credits—tuition policies, financial aid policies, and structural policies. It concludes by identifying issues that colleges and states wishing to implement 15-credit strategies should consider.
title: Odyssea latina; 1520 - 1521
title: (Ir) [Briefentwurf]. (Iv) Homerus: Odyssea latina. (161v) Publius Vergilius Maro: Aeneis (Exzerpt zu Liber VII).
titleType: Subtitle
Creators: name: Homerus
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2022

description: Papier – humanistische Kursive von einer Hand, zahlreiche Korrekturen, Ergänzungen u. Randbemerkungen von weiteren Händen (darunter Heinrich Loriti Glarean), Federzeichnungen (80r, 104v, 109r u. 161r)
The Curious Case of the Maximum Rigidity Distribution of Ultra-high Energy Cosmic-Ray Accelerators
Creators: name: Oikonomou, Foteini
name: Ehlert, Domenik
name: Unger, Michael
Publisher: name: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Year: 2023

description: A standard assumption among models of candidate source populations of ultra-high energy cosmic rays (UHECRs) is that all sources in the population accelerate particles to the same maximum energy. Motivated by the fact that candidate astrophysical accelerators exhibit a vast diversity in terms of their relevant properties, such as luminosity, Lorentz factor, and magnetic field strength, we study the compatibility of a population of sources with non-identical maximum cosmic-ray energies with the observed energy spectrum and composition of UHECRs at Earth. For this purpose, we compute the UHECR spectrum emerging from a population of sources with a power-law, or broken-power-law, distribution of maximum energies applicable to a broad range of astrophysical scenarios. We find that for a wide range of studied models, the maximum energies of the UHECR accelerators must be nearly identical in order to be compatible with the UHECR data, in stark contrast to the variance expected for the astrophysical source models considered. A substantial variance of the maximum energy is only consistent with the UHECR data if the maximum energies of the UHECR sources follow a broken power-law distribution with a very steep spectrum above the break. However, in this scenario, the individual source energy spectra must be unusually hard with increasing energy output as a function of energy.
Machiavelli’s “Ferocious Freedom”: Dangerous Nature, Subjectivity, and the Necessity of Violence
Creators: name: Fen, Sean (Hsuan-Lun)
Publisher: name: University of Chicago
Year: 2023

description: What must one undertake to transform one’s subjectivity in order to acquire and maintain one’s free status in a world where one’s freedom is inherently fragile and susceptible to constant dangers? This thesis aims to explore Niccolò Machiavelli’s ethos of protecting individual and collective freedom (exemplified by a democratic way of life) by highlighting the existential and institutional significance of the necessity of violence and the necessary dangers imposed by others’ “ambitions.” Based primarily on Machiavelli’s works The Prince and Discourses on Livy, my reading suggests that for Machiavelli, maintaining freedom (i.e., autonomy or not being dominated or oppressed by others) is inextricable from the constant production or emergence of what I refer to as a “ferocious subjectivity.” This consists of (1) the necessary willingness to look at the world as conflictual or hostile in itself, which forces one to have an existential understanding of the inherent fragility of one’s freedom, and (2) the necessary capacity to engage in violence that this new horizon of nature or life necessitates and which is justified because it enables a free being to courageously respond to this ontologically dangerous world.
The curious case of Mercury's internal structure
Creators: name: Hauck II, Steven A.
name: Margot, Jean-Luc
name: Solomon, Sean C.
name: Phillips, Roger J.
name: Johnson, Catherine L.
name: Lemoine, Frank G.
name: Mazarico, Erwan
name: McCoy, Timothy J.
name: Padovan, Sebastiano
name: Peale, Stanton J.
name: Perry, Mark E.
name: Smith, David E.
name: Zuber, Maria T.
Publisher: name: Columbia University
Year: 2013
Subjects: Planetology

description: The recent determination of the gravity field of Mercury and new Earth-based radar observations of the planet’s spin state afford the opportunity to explore Mercury’s internal structure. These observations provide estimates of two measures of the radial mass distribution of Mercury: the normalized polar moment of inertia and the fractional polar moment of inertia of the solid portion of the planet overlying the liquid core. Employing Monte Carlo techniques, we calculate several million models of the radial density structure of Mercury consistent with its radius and bulk density and constrained by these moment of inertia parameters. We estimate that the top of the liquid core is at a radius of 2020 ±30 km, the mean density above this boundary is 3380±200 kg m⁻³, and the density below the boundary is 6980 ±280 kg m⁻³. We find that these internal structure parameters are robust across a broad range of compositional models for the core and planet as a whole. Geochemical observations of Mercury’s surface by MESSENGER indicate a chemically reducing environment that would favor the partitioning of silicon or both silicon and sulfur into the metallic core during core-mantle differentiation. For a core composed of Fe–S–Si materials, the thermodynamic properties at elevated pressures and temperatures suggest that an FeS-rich layer could form at the top of the core and that a portion of it may be presently solid.
The Nature of the Second Parameter in the IRX-beta Relation for Local Galaxies
Creators: name: Grasha, Kathryn
name: Calzetti, Daniela
name: Andrews, Jennifer E.
name: Lee, Janice C.
name: Dale, Daniel A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an analysis of 98 galaxies of low-dust content, selected from the Spitzer Local Volume Legacy survey, aimed at examining the relation between the ultraviolet (UV) color, beta, and dust attenuation in normal star-forming galaxies. The IRX-beta diagram relates the total dust attenuation in a galaxy, traced by the far-IR (FIR) to UV ratio, to the observed UV color, indicated by beta. Previous research has indicated that while starburst galaxies exhibit a relatively tight IRX-beta relation, normal star-forming galaxies do not, and have a much larger spread in the total-IR to far-UV (FUV) luminosity for a fixed UV color. We examine the role that the age of the stellar population plays as the "second parameter" responsible for the observed deviation and spread of star-forming galaxies from the starburst relation. We model the FUV to FIR spectral energy distribution (SED) of each galaxy according to two broad bins of star formation history (SFH): constant and instantaneous burst. We find clear trends between stellar population mean age estimators (extinction-corrected FUV/NIR, U-B, and EW(H-alpha)) and the UV color, beta; the trends are mostly driven by the galaxies best-described by instantaneous burst populations. We also find a significant correlation between beta and the mean age directly determined from the best-fit instantaneous models. As already indicated by other authors, the UV attenuation in star-forming galaxies may not be recovered with the UV color alone and is highly influenced by the stellar population's mean age and SFH. Overall, the scatter in the IRX-beta diagram is better correlated with beta than with the perpendicular distance.
description: 15 pages, 10 figures, accepted for publication in ApJ
Metabolic Profiling of Averrhoa carambola Fruit Extract using UHPLC-ESI-QTOF-MS and Determination of the Concentration of Essential Elements using MP-AES
Creators: name: Biswal, Ranendra Pratap
name: Patnana, Durga Prasad
name: Vutukuri, V N Ravi Kishore
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology
subject: 60506 Virology

description: A rapid and sensitive ultra-high-performance liquid chromatography-electrospray ionization quadrupole time of flight mass spectrometry (UHPLC-ESI-QTOF-MS) based method was developed to separate and identify 44 phenolics and non-phenolics present in Averrhoa carambola fruit in three different stages of its growth. 5 anthocyanins, 9 phenolic acids, 3 flavones, 5 flavanols, 3 flavanones, amino acids, vitamins and other phenolic and non-phenolic compounds were identified. The identification and quantification of 27 bioactive compounds from methanolic star fruit extract are being reported for the first time. All the metabolites were quantified by normalizing the area under the peaks with that of the internal standard hydrocortisone. The extraction of metabolites by using a homogeniser (bead beater) was found to be the best method for the extraction of metabolites. Four essential microelements (Zn, Fe, Mn, Cr) and three macroelements (K, Mg, Na) were quantified from star fruit using MP-AES. The zinc concentration (6.988 mg/100 g) in star fruit was found to be higher than in many cereals, vegetables and fruits. The methanolic star fruit extract showed excellent DPPH scavenging activity of 93% after 30 min of incubation in dark for the dry weight sample concentration of 50 mg/ml. In conclusion, the UHPLC-ESI-QTOF-MS based method developed and MP-AES results presented here can be used in the quality control of food supplements and medicines.