cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Phenotypical and functional studies on putative cancer stem cells of human melanoma
Creators: name: Perego, Michela
Publisher: name: The Open University
Year: 2011

description: Several lines of evidence obtained in a variety of human tumours support the theory of cancer stem cells (CSCs). The aim of this thesis was the isolation and the biomolecular characterization of the tumorigenic subpopulation of melanoma cells. Melanoma cells growing in stem cell medium as non-adherent colonies, here named 'melanospheres', were successfully isolated from melanoma specimens or from melanoma cell lines. Melanospheres displayed a self-renewal capacity and multipotency in vitro and were highly tumorigenic in vivo. Remarkably, melanosphere-derived xenografts maintained tumorigenic potential in subsequent recipients and mirrored the original melanoma of the patient. Melanospheres expressed a heterogeneous assortment of stem cell markers, and no direct and unique correlation between any of their phenotypes and in vivo tumorigenicity was found. Conversely, melanoma cells cultured in the presence of fetal calf serum displayed a lower tumorigenicity in SCID mice with limited engraftment capacity in secondary recipient animals. Moreover, adherent cell xenografts displayed a homogeneous phenotype for the expression of melanoma associated markers and contained cells with markers of full differentiation. Taken together our data provide further evidence on the heterogeneous nature of human melanomas and show that melanospheres and their xenografted tumours represent a useful model to investigate melanoma biology. The parent-to-progeny relationship between CSCs and tumour bulk does not necessarily reflect the well conserved and predictable rules operating in normal tissue development. CSCs may thus not be a static compartment but rather stemness features can be acquired by tumour cells in response to environmental signals. Thus, in this thesis, experiments have been performed to define the role of tumour environmental factors produced by melanoma cells themselves or by cells composing the tumour stroma in modulating the acquisition of sternness properties. The results provided in this thesis indicated that melanospheres display an extensive secretory capacity quantitatively and qualitatively different from that of melanoma cells growing as adherent monolayer. The roles of these immunerelated factors in shaping melanoma heterogeneity, plasticity and tumour maintenance are discussed.
UBC Database Interface Project
Creators: name: Ao, Edmund
name: Ao, Teddy
name: Tin Htun, Angeline
name: Wong, Linda
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Heisenberg scaling precision in multi-mode distributed quantum metrology
Creators: name: Gramegna, Giovanni
name: Triggiani, Danilo
name: Facchi, Paolo
name: Narducci, Frank A.
name: Tamma, Vincenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an $N$-photon Gaussian measurement scheme which allows the estimation of a parameter $φ$ encoded into a multi-port interferometer with a Heisenberg scaling precision (i.e. of order $1/N$). In this protocol, no restrictions on the structure of the interferometer are imposed other than linearity and passivity, allowing the parameter $φ$ to be distributed over several components. In all previous proposals Heisenberg scaling has been obtained provided that both the input state and the measurement at the output are suitably adapted to the unknown parameter $φ$. This is a serious drawback which would require in practice the use of iterative procedures with a sequence of trial input states and measurements, which involve an unquantified use of additional resources. Remarkably, we find that only one stage has to be adapted, which leaves the choice of the other stage completely arbitrary. We also show that our scheme is robust against imperfections in the optimized stage. Moreover, we show that the adaptive procedure only requires a preliminary classical knowledge (i.e to a precision $1/\sqrt{N}$) on the parameter, and no further additional resources. As a consequence, the same adapted stage can be employed to monitor with Heisenberg-limited precision any variation of the parameter of the order of $1/\sqrt{N}$ without any further adaptation.
description: 5 pages, 3 figures
Large deviations in weakly interacting boundary driven lattice gases
Creators: name: van Wijland, Frederic
name: Racz, Zoltan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: One-dimensional, boundary-driven lattice gases with local interactions are studied in the weakly interacting limit. The density profiles and the correlation functions are calculated to first order in the interaction strength for zero-range and short-range processes differing only in the specifics of the detailed-balance dynamics. Furthermore, the effective free-energy (large-deviation function) and the integrated current distribution are also found to this order. From the former, we find that the boundary drive generates long-range correlations only for the short-range dynamics while the latter provides support to an additivity principle recently proposed by Bodineau and Derrida.
description: 27 pages, 2 figures
Einfluss eines Schulhundes auf exekutive Funktionen Eine Literaturarbeit zum aktuellen Forschungsstand
Creators: name: Gehriger, Rahel
Publisher: name: Zenodo
Year: 2020
Subjects: Sonderpädagogik
Exekutive Funktionen
Schule
Tiergestützte Therapie
Masterarbeit

description: Die vorliegende Masterarbeit erforscht anhand aktueller Grundlagenliteratur und Studien Zusammenhänge zwischen dem Einsatz eines Schulhundes und der Förderung der exekutiven Funktionen bei Kindern. Die Literaturarbeit gibt einen Überblick über zentrale Begriffe und Konzepte rund um die exekutiven Funktionen und tiergestützte Interventionen. Mittels qualitativer Inhaltsanalyse werden Studien untersucht, welche mit Hunden in Schulen durchgeführt wurden. Die Ergebnisse werden strukturiert aufgezeigt. Es werden herausgefilterte Zusammenhänge dargelegt und diskutiert. Die festgestellten Tendenzen sind vielversprechend und sollten durch Forschung im Bereich Schulhund und exekutive Funktionen weiter untersucht werden.
Agenda building
Creators: name: Nisbet, Matthew C.
Publisher: name: American University
Year: 2023

description: Agenda building refers to the process by which news organizations and journalists feature, emphasize, and/or select certain events, issues, or sources to cover over others. Research in the area is closely linked to but distinct from the agenda-setting tradition which examines the connection between the issues portrayed in the news media and the issue priorities of the public (McCombs 2004). Agenda building is also related to work in political science on policy agenda setting , which focuses on how news coverage both reflects and shapes the priorities of government officials, decision-makers, and elites (Baumgartner & Jones 1993; → Agenda-Setting Effects). The news agenda is defined as the list of events or issues that are portrayed in coverage at one point in time or across time. Events are discrete occurrences, such as the release of a government report on greenhouse gas emissions or a presidential speech on Iraq. An issue can be a series of related events that are grouped together within a larger category of meaning such as climate change, the environment, the war in Iraq, or foreign policy. Sources include the voices, actors, or groups featured in news coverage such as government officials, environmentalists, or antiwar protestors (Reese 1991; → News Sources). The agenda-building literature is characterized by a diversity of theoretical and methodological approaches. However, a common thread is that news coverage is not a reflection of reality, but rather a manufactured product, determined by a hierarchy of social influences that span levels of analysis ( → Reality and Media Reality). Macro-level factors involve economic, cultural, and ideological variables along with ownership structure and industry trends. Mid-range influences include organizational routines, professional norms, → journalist role perceptions, and source strategies. Individual-level influences derive from socio-economic, political, and psychological orientations of journalists (Shoemaker & Reese 1996).
Kevin_Yohanes_Rondonuwu_20181000044__Proposal_RTI.pdf
Creators: name: Yohanes, Kevin
Publisher: name: figshare
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)
subject: 190299 Film, Television and Digital Media not elsewhere classified

description: Millennial Preference for the Type of Film They Will be Interested In
Addressing systematic errors in axial distance measurements in single-emitter localization microscopy
Creators: name: Petrov, Petar N.
name: Moerner, W. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Nanoscale localization of point emitters is critical to several methods in optical fluorescence microscopy, including single-molecule super-resolution imaging and tracking. While the precision of the localization procedure has been the topic of extensive study, localization accuracy has been less emphasized, in part due to the challenge of producing an experimental sample containing unperturbed point emitters at known three-dimensional positions in a relevant geometry. We report a new experimental system which reproduces a widely-adopted geometry in high-numerical aperture localization microscopy, in which molecules are situated in an aqueous medium above a glass coverslip imaged with an oil-immersion objective. We demonstrate a calibration procedure that enables measurement of the depth-dependent point spread function (PSF) for open aperture imaging as well as imaging with engineered PSFs with index mismatch. We reveal the complicated, depth-varying behavior of the focal plane position in this system and discuss the axial localization biases incurred by common approximations of this behavior. We compare our results to theoretical calculations.
description: 16 pages, 10 figures
High mass X-ray binaries in the LMC: dependence on the stellar population age and the "propeller" effect
Creators: name: Shtykovskiy, P.
name: Gilfanov, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study population of compact X-ray sources in the Large Magellanic Cloud using the archival data of XMM-Newton observatory. The total area of the survey is approximately 3.8 square degrees with the limiting sensitivity of about 10^{-14} erg/s/cm^2, corresponding to the luminosity of 3*10^{33} erg/s at the LMC distance. Out of 460 point sources detected in the 2--8 keV energy band,the vast majority are background CXB sources, observed through LMC. Based on the properties of the optical and near-infrared counterparts of the detected sources we identified 9 likely HMXB candidates, and 19 sources, which nature is uncertain, thus, providing a lower and upper limits on the luminosity distribution of HMXBs in the observed part of LMC. When considered globally, the bright end of this distribution is consistent within statistical and systematic uncertainties with extrapolation of the universal luminosity function of HMXBs. However, there seems to be fewer low luminosity sources, log(Lx)<35.5, than predicted. We consider the impact of the ``propeller effect'' on the HMXB luminosity distribution and show, that it can qualitatively explain the observed deficit of low luminosity sources. We found significant field-to-field variations in the number of HMXBs across the LMC, which appear to be uncorrelated with the star formation rates inferred by the FIR and Halpha emission. We suggest that these variations are caused by the dependence of the HMXB number on the age of the underlying stellar population. Using the existence of large coeval stellar aggregates in the LMC, we constrain the number of HMXBs as a function of time elapsed since the star formation event in the range of from 1-2 Myr to 10-12 Myr.
description: 18 pages, 11 figures accepted to A&A (Minor changes made according to referee Comments)
Effect of symmetry of the electron states of HTSC on the current-voltage characteristics of SIS junctions
Creators: name: Arseev, P. I.
name: Fedorov, N. K.
name: Loiko, S. O.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The current-voltage $IV$ characteristics of $SIS$ junctions are calculated in the framework of a multiband model with an anisotropic effective order parameter of HTSC. The results of calculations show that the shape of $IV$ characteristic and the density of electron states changes significantly depending on the parameters of the model. A theoretical explanation is proposed for the experimentally observed $s$-like behavior of the $IV$ characteristics of $SIN$ and $SIS$ junctions with BSCCO-type superconductors. The dependence of the superconducting peaks asymmetry on the mutual arrangement of the bands is analyzed. The difference between the obtained results and the results of single-band models with the $s$ and $d$ symmetries of the order parameter is discussed.
description: 11 pages, 4 figures
An isogeometric boundary element method for soft particles flowing in microfluidic channels
Creators: name: Lyu, J. M.
name: Chen, Paul G.
name: Boedec, G.
name: Leonetti, M.
name: Jaeger, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Understanding the flow of deformable particles such as liquid drops, synthetic capsules and vesicles, and biological cells confined in a small channel is essential to a wide range of potential chemical and biomedical engineering applications. Computer simulations of this kind of fluid-structure (membrane) interaction in low-Reynolds-number flows raise significant challenges faced by an intricate interplay between flow stresses, complex particles' interfacial mechanical properties, and fluidic confinement. Here, we present an isogeometric computational framework by combining the finite-element method (FEM) and boundary-element method (BEM) for an accurate prediction of the deformation and motion of a single soft particle transported in microfluidic channels. The proposed numerical framework is constructed consistently with the isogeometric analysis paradigm; Loop's subdivision elements are used not only for the representation of geometry but also for the membrane mechanics solver (FEM) and the interfacial fluid dynamics solver (BEM). We validate our approach by comparison of the simulation results with highly accurate benchmark solutions to two well-known examples available in the literature, namely a liquid drop with constant surface tension in a circular tube and a capsule with a very thin hyperelastic membrane in a square channel. We show that the numerical method exhibits second-order convergence in both time and space. To further demonstrate the accuracy and long-time numerically stable simulations of the algorithm, we perform hydrodynamic computations of a lipid vesicle with bending stiffness and a red blood cell with a composite membrane in capillaries. The present work offers some possibilities to study the deformation behavior of confining soft particles, especially the particles' shape transition and dynamics and their rheological signature in channel flows.
description: 43 pages, 19 figures
Construyendo la voluntad politica por una maternidad segura en Honduras : Constructing political will for safe motherhood in Honduras
Creators: name: Shiffman, Jeremy
name: Stanton, Cynthia
name: Salazar, Ana Patricia
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 44
subject: Human society

description: Description to be added
THE EFFECT OF INFLATION ON AGRICULTURAL PRODUCTION UNDER CONDITIONS OF RISK
Creators: name: Van Zyl, J.
name: Van Zyl, J.
Publisher: name: Unknown
Year: 1986
Subjects: Agricultural and Food Policy
Financial Economics
Risk and Uncertainty

description: From 1973 South Africa experienced double digit inflation with slower increases in agricultural producers' prices than for, inputs. This resulted in declining profitability and purchasing power parity of agricultural products, increasing debts and risk, and the weakening of agriculture's competitive position on international markets. Input price inflation creates cash flow problems for farmers and increases the necessity of a high level of operational management and conservative financial strategies. Individual farmers can possibly counteract the effect of input price inflation through increases in productivity and economizing on costs. Present competitive structures may however possibly result in accelerated input price inflation if increases in productivity and economizing on costs occur for agriculture in aggregate. Solutions will be dictated by general economic policy. More effective competition and the enlargement of effective demand through accelerated urbanization have, at least theoretically, potential possibilities.
Understanding the mechanisms of action of estrogen receptor mutations in metastatic breast cancer
Creators: name: Harrod, Alison Elizabeth
Publisher: name: Imperial College London
Year: 2018

description: Estrogen receptor (ER) is a key driver of breast cancer development and progression and is the target for endocrine therapies. Use of endocrine agents has contributed greatly to reductions in breast cancer mortality over the last three decades. However, many patients develop resistance to these therapies, for reasons that remain unclear. Recent studies have identified ESR1 (ER) mutations in metastatic breast cancer that are predicted to encode ER proteins that are constitutively active and resistant to anti-estrogens. However, functional studies to determine the action of these mutations is impeded by the lack of breast cancer cell lines encoding ESR1 mutations. Here, I have developed the engineered CRISPR-Cas9 genome editing system to incorporate ESR1 mutations in the genomically encoded gene in the well-studied estrogen responsive and ER-positive MCF7 breast cancer cell line. I show that MCF7 cells with genomically encoded tyrosine 537 to serine (Y537S) ER mutation are estrogen independent for their growth and show global ligand-independent ER recruitment to regulatory regions and frequently elevated expression of estrogen-responsive genes. Ligand-independent expression and growth was also found for fourteen further CRISPR knockin MCF7 cells encoding additional ESR1 mutations, with between two and four individual clones derived for each mutation. Partial resistance to anti-estrogens is also seen with the ESR1 mutations, as higher concentrations of 4-hydroxytamoxifen and Faslodex are required to achieve the same growth inhibition as are required for the parental (wild-type) cells. All ESR1 mutation knockin lines demonstrated sensitivity to CDK7 inhibitors alone and in combination with Faslodex, highlighting the utility of these lines for the assessment of potential therapeutic agents. Finally, the use of CRISPR to revert an ESR1 mutation back to wild-type in a long-term estrogen-deprived MCF7 cell line, led to the restoration of an estrogen-dependent phenotype, confirming the importance of these mutations for ligand-independence.
DUALITY AND ELASTICITIES OF SUBSTITUTION I: THEORETICAL CONSIDERATIONS
Creators: name: Van Zyl, J.
name: Van Zyl, J.
Publisher: name: Unknown
Year: 1986
Subjects: Agricultural and Food Policy
Financial Economics
Research Methods/ Statistical Methods

description: An alternative approach to the estimation of functional specifications from physical input data, involves estimation of factor share equations from cost data. This is done by using the duality that exists between the production function and the , cost function along the expansion path. The basic dual input definition of elasticity of substitution renders a number of alternative concepts possible. The Allen, Morishima and Shadow measures are particularly useful. Although specific production functions frequently embody assumptions that may have important disadvantages with respect to the substitutability of inputs, the translog specification represents relaxations of these maintained hypotheses. The translog functional specification is thus the production function of choice for empirical estimation of elasticities of substitution between input pairs when little information about the production process other than cost data, is available.
On the Variability of Best Critical Regions and the Curvature of Exponential Models
Creators: name: Hillier, Grant H.
name: Hillier, Grant H.
Publisher: name: Unknown
Year: 1990
Subjects: Research Methods/ Statistical Methods

description: The Neyman-Pearson Lemma usually implies that the best critical region (BCR) for testing a given hypothesis varies with the alternative. For this reason, most commonly used tests are justified either by replacing the objective of maximum power by a weaker objective such as maximum slope of the power function at the null, or by resorting to some other testing principle, such as a likelihood ratio test. However, BCRs that vary with the alternative may sometimes in fact vary very little, and in this 'paper I suggest a measure of the variability of such regions. Some examples confirm the conjecture that there are cases where the BCRs vary very little. Section 4 of the paper applies this idea to the family of one-parameter curved exponential models, and relates it to Efron's [41 notion that inference in highly curved models is likely to be more difficult that it is in uncurved or linear exponential models. Finally, we discuss testing tactics in problems where it can be shown that the BCRs for the problem vary very little.
IMAC: In-memory multi-bit Multiplication andACcumulation in 6T SRAM Array
Creators: name: Ali, Mustafa
name: Jaiswal, Akhilesh
name: Kodge, Sangamesh
name: Agrawal, Amogh
name: Chakraborty, Indranil
name: Roy, Kaushik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Emerging Technologies (cs.ET)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: `In-memory computing' is being widely explored as a novel computing paradigm to mitigate the well known memory bottleneck. This emerging paradigm aims at embedding some aspects of computations inside the memory array, thereby avoiding frequent and expensive movement of data between the compute unit and the storage memory. In-memory computing with respect to Silicon memories has been widely explored on various memory bit-cells. Embedding computation inside the 6 transistor (6T) SRAM array is of special interest since it is the most widely used on-chip memory. In this paper, we present a novel in-memory multiplication followed by accumulation operation capable of performing parallel dot products within 6T SRAM without any changes to the standard bitcell. We, further, study the effect of circuit non-idealities and process variations on the accuracy of the LeNet-5 and VGG neural network architectures against the MNIST and CIFAR-10 datasets, respectively. The proposed in-memory dot-product mechanism achieves 88.8% and 99% accuracy for the CIFAR-10 and MNIST, respectively. Compared to the standard von Neumann system, the proposed system is 6.24x better in energy consumption and 9.42x better in delay.
description: (In-proceedings)2020 Accepted in IEEE Transactions on Circuits and Systems-I Journal
NA61/SHINE results on fluctuations and correlations at CERN SPS energies
Creators: name: Mackowiak-Pawlowska, Maja
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The aim of the NA61/SHINE strong interaction programme is to explore the phase diagram of strongly interacting matter. The main physics goals are the study of the onset of deconfinement and the search for the critical point of strongly interacting matter. These goals are pursued by performing a beam momentum (13A -- 150/158A GeV/c) and system size (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb) scan. This contribution presents new results from NA61/SHINE on fluctuations and correlations which include in particular quantum correlations, as well as multiplicity and net-charge fluctuations, proton density fluctuations and anisotropic collective flow. Obtained results are compared with other experiments and with model predictions.
description: QM2019 proc
A New Approach to Modeling the Microdosimetry of Proton Therapy Beams
Creators: name: Abolfath, Ramin
name: Helo, Yusuf
name: Carlson, David J.
name: Stewart, Robert
name: Grosshans, David
name: Mohan, Radhe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: {\bf Introduction}: To revisit the formulation of the mean chord length in microdosimetry and replace it by the particle mean free path appropriate for modelings in radio-biology. {\bf Methods}: We perform a collision-by-collision following by event-by-event Geant4 Monte Carlo simulation and calculate double-averaged stepping-length, $\langle\langle l \rangle\rangle$, for a range of target sizes from mm down to $μ$m and depth in water. We consider $\langle\langle l \rangle\rangle$ to represent the particle mean free path. {\bf Results}: We show that $\langle\langle l \rangle\rangle$ continuously drops as a function of depth and asymptotically saturates to a minimum value in low energies, where it exhibits a universal scaling behavior, independent of particle nominal beam energy. We correlate $\langle\langle l \rangle\rangle$ to linear density of DNA damage, complexities of initial lethal lesions and illustrate a relative difference between predictive RBEs in model calculations using mean chord length vs. the proposed mean free path. We demonstrate consistency between rapid increase in RBE within and beyond the Bragg peak and $\langle\langle l \rangle\rangle$, a decreasing function of depth. {\bf Discussion and conclusion}: An interplay between localities in imparted energy at nano-meter scale and subsequent physio-chemical processes, causalities and pathways in DNA damage requires substitution of geometrical chord length of cell nuclei by mean-free path of proton and charged particles to account for a mean distance among sequential collisions in DNA materials.
description: 5 figures, accepted for publication in Medical Physics
Mental Rotation Test Performance in Brazilian and German Adolescents: The Role of Sex, Processing Speed, and Physical Activity in Two Different Cultures
Creators: name: Jansen, Petra
name: Paes, Flávia
name: Hoja, Sabine
name: Machado, Sergio
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: 796 Sport

description: It was the main goal of this study to investigate performance on the mental rotation test (MRT) in Brazilian and German adolescents. Mental rotation is the ability to mentally transform a three-dimensional stimulus in mind and relates to science education. 60 German and 60 Brazilian adolescents (76 males and 44 females, 11–17 years) completed the Mental Rotation Test, a physical activity and media use questionnaire and a Number Connection Test. The result showed no difference between Brazilian and German adolescents in the cognitive processing speed measurement. German adolescents are more active and show a less media use compared to the Brazilian adolescents. Furthermore, German adolescents demonstrate a better MRT performance than Brazilian ones, as well as boys show a better performance than girls do. A multiple regression analysis indicated that the MRT performance could be predicted by nationality, sex, and cognitive processing speed. Since cognitive processing speed did not differ between Brazilian and German adolescents, the worse MRT performance of the Brazilian adolescents could be explained by different educational systems. Further studies have to follow which investigate the reasons for the different nations in more detail.
title: Learning for work: Social identities and professional education
Creators: name: McSweeney, Fiona
Publisher: name: The Open University
Year: 2011

description: The aims of this study were twofold. The first was to explore how social care practitioners undertaking a degree course to obtain the required professional qualification interpret the roles of student and social care practitioner and how structural factors particularly in the college environment impact on these interpretations. The second aim was to examine the development and change in the social identities of student and social care practitioner. The theoretical framework used to explore identity is that of structural symbolic interactionism as it provides a structure in which stability and change in identity, as well as the influence of social context can be examined. Congruent with the aims of the study and the theoretical framework a qualitative methodology is used. Data was mainly collected using a series of semi-structured interviews but supplemented through participant observation, questionnaires and diaries. Fifteen participants were involved and interviewed three times throughout their first academic year. Nine participants were interviewed again at the end of their second academic year. Commonality was found in the interpretations of the roles of social care practitioner and student, agreeing with existing literature. However variation was found among participants in the integration between and bi-directional impact of the two social identities suggesting that work-related learning is affected individual and social factors. Recommendations for the professional education of social care workers are made.
The Locally Unbiased Two-Sided Durbin-Watson Test
Creators: name: Grose, Simone D.
name: King, Maxwell L.
name: Grose, Simone D.
name: King, Maxwell L.
Publisher: name: Unknown
Year: 1990
Subjects: Research and Development/Tech Change/Emerging Technologies

description: An algorithm for. constructing locally unbiased two-sided critical regions for the Durbin-Watson test is presented. It can also be applied to other two-sided tests. Empirical calculations suggest that, at least for the Durbin-Watson test, the current practice of using equal-tailed critical values yields approximately locally unbiased critical regions.
DUALITY AND ELASTICITIES OF SUBSTITUTION II: AN EMPIRICAL APPLICATION
Creators: name: Van Zyl, J.
name: Van Zyl, J.
Publisher: name: Unknown
Year: 1986
Subjects: Agricultural and Food Policy
Financial Economics

description: An analysis was made of potential differences in elasticities of substitution between agricultural inputs over time in different sectors of South African agricultural production. The elasticity of substitution between input pairs in South African agriculture has declined considerably from 1960-1972 to 1973-1985. Total agricultural production seems to have more flexibility in dealing with input price variation than either wheat or maize production as distinct sub-sectors. U.S. agriculture exhibits much more flexibility in dealing with especially machinery price variations. The relative rigidity of the South African agricultural production process may at least partially be attributed to present competitive structures.
Dynamically decoupled three-body interactions with applications to interaction-based quantum metrology
Creators: name: Mahmud, K.W.
name: Tiesinga, E.
name: Johnson, Philip
Publisher: name: American University
Year: 2023

description: We propose a stroboscopic method to dynamically decouple the effects of two-body atom-atom interactions for ultracold atoms, and realize a system dominated by elastic three-body interactions. Using this method, we show that it is possible to achieve the optimal scaling behavior predicted for interaction-based quantum metrology with three-body interactions. Specifically, we show that for ultracold atoms quenched in an optical lattice, we can measure the three-body interaction strength with a precision proportional to ¯n−5/2 using homodyne quadrature interferometry, and ¯n−7/4 using conventional collapse-and-revival techniques, where ¯n is the mean number of atoms per lattice site. Both precision scalings surpass the nonlinear scaling of ¯n−3/2, the best so far achieved or proposed with a physical system. Our method of achieving a decoupled three-body interacting system may also have applications in the creation of exotic three-body states and phases.
Dynamically decoupled three-body interactions with applications to interaction-based quantum metrology
Creators: name: Mahmud, K.W.
name: Tiesinga, E.
name: Johnson, Philip
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 51
subject: Physical sciences
subject: FOS: Physical sciences

description: We propose a stroboscopic method to dynamically decouple the effects of two-body atom-atom interactions for ultracold atoms, and realize a system dominated by elastic three-body interactions. Using this method, we show that it is possible to achieve the optimal scaling behavior predicted for interaction-based quantum metrology with three-body interactions. Specifically, we show that for ultracold atoms quenched in an optical lattice, we can measure the three-body interaction strength with a precision proportional to ¯n−5/2 using homodyne quadrature interferometry, and ¯n−7/4 using conventional collapse-and-revival techniques, where ¯n is the mean number of atoms per lattice site. Both precision scalings surpass the nonlinear scaling of ¯n−3/2, the best so far achieved or proposed with a physical system. Our method of achieving a decoupled three-body interacting system may also have applications in the creation of exotic three-body states and phases.
title: Effects of ecosystem disturbance on fluvial carbon losses from tropical peat swamp forests
Creators: name: Moore, Samuel
Publisher: name: The Open University
Year: 2011

description: Investigations into the effects of anthropogenic disturbance on greenhouse gas emissions from tropical peatlands are relatively well documented. However, the effects of such disturbance on fluvial carbon (C) losses has, thus far, been overlooked and remains unaccounted for in these ecosystem C budgets. Here, three land-cover classes in Central Kalimantan, Indonesia, were investigated in order to determine the effect of tropical peatland disturbance on fluvial organic C budgets.

Intact peat swamp forest (IPSF), moderately disturbed and severely disturbed peat swamp forest (DPSF1 and 2) catchments were monitored for one year. Results demonstrate a trend of increasing annual total organic carbon (TOC) yields with increasing drainage severity, from 63 in IPSF to 105 and 131 g C m-2 yr-1 in DPSF1 and 2, respectively. Including this routinely-ignored fluvial C loss component in the disturbed peatland ecosystem C budget increases the estimated total C loss by 30%. Radiocarbon analysis of dissolved organiC carbon (DOC) reveals that whilst DOC leaching from IPSF was derived from recent primary production, DOC leaching from the two disturbed sites was comprised of much older C, originating from deep within the peat column.

The TOC flux from the Sebangau River basin was estimated to be 0.46 teragrams yr-1, which upon regional extrapolation indicates that Indonesian rivers account for 10% of the global annual riverine DOC export to the ocean. There were no significant differences between sites in the quality of the organic C lost, but DOC lost from disturbed sites was generally less aromatic than from the intact site. It is recognized that a large portion of this labile C will be emitted to the atmosphere via biotic decomposition. Since 1990, peatland disturbance has resulted in a 53% increase in fluvial organic C export from Southeast Asia, an increase that alone approximates the entire annual fluvial organic C flux from European peatlands.
Screening piezoelectricity in determination of flexoelectric coefficient at nanoscale
Creators: name: Lun, Yingzhuo
name: Zhou, Hao
name: Yao, Di
name: Wang, Xueyun
name: Hong, Jiawang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Piezoelectricity usually accompanies with flexoelectricity in polar materials which is the linear response of polarization to a strain gradient. Therefore, it is hard to eliminate piezoelectric effect in determination of pure flexoelectric response. In this work, we propose an analytical method to characterize the flexoelectric coefficient quantitatively at nanoscale in piezoelectric materials by screening piezoelectricity. Our results show that the flexoelectricity reduces the nanopillar stiffness while the piezoelectricity enhances it. With careful design of the shape of the nanopillars and measuring their stiffness difference, the flexoelectric coefficient can be obtained with the piezoelectric contribution eliminated completely. This approach avoids the measurement of electrical properties with dynamic load, which helps to reduce the challenge of flexoelectric measurement at nanoscale. Our work will be beneficial to quantitative characterization of flexoelectric properties and design of flexoelectric devices at nanoscale.
Kemeny, G., 2005. Über das wirksamen Auftreten gegen Gewalt innerhalb der Familie – de lege ferenda. In: Gál and Köhalmi eds. Emlékkönyv Losonczy István professzor halálának 25. évfordulójára Pécs: Pécsi Tudományegyetem, Állam- és Jogtudományi Kar, pp 177-184.
Creators: name: Kemeny, Gabor
Publisher: name: figshare
Year: 2020
Subjects: subject: 180110 Criminal Law and Procedure
subject: FOS: Law

description: About the Hungarian legislation on domestic violence and restrain order.
Quantitative determination of total triterpenoids in exudates of Thymus species
Creators: name: Nikolova, Milena
name: Aneva, Ina
Publisher: name: Zenodo
Year: 2021

description: Exudates consist mainly of lipophilic compounds accumulated on the surface of plant tissue. They are obtained by rapidly rinsed of the whole, not ground plant parts. Previously GC/MS analysis of exudates of Thymus species showed that triterpene acids are the main component of them. Triterpene acids are compounds with important biological and pharmacological activity, among them the antitumor is especially valuable. Simonyan et al., 1972, have described the rapid and easy method for the quantitative determination of triterpenoids. The method is based on the reaction of triterpenes with concentrated sulfuric acid whereupon (whereby) they are oxidized and form colored products that can be measured spectrophotometrically in the 310 nm region. Spectrophotometric analysis of exudates of eight Thymus species was applied to assess quickly and easily the content of triterpenoids. The plant material was collected from their natural localities. Four of the studied species are members of the section Hyphodromi (Thymus atticus, T. perinicus, T. striatus, and T. zygioides) and the other four species belong to section Serpyllum (T. longedentatus, T. longicaulis, T. pulegioides, and T. sibthorpii). One of the studied species is a local endemic with distribution in Pirin Mts only (T. perinicus), one is a Balkan endemic (T. longedentatus) and two of them are sub-endemics (T. atticus, T. sibthorpii). Exudates were obtained from dry, not ground plant material by washing with acetone to dissolve the exudate material. Total triterpenoids were determined by sulfuric acid following the principles cited above. The triterpenoid content was expressed as percent (%) in exudate in equivavalent of oleanolic acid. The highest content of triterpenoids was found in T. perinicus, T. pulegioides, T. striatus, T. atticus, T. longicaulis exudates. The established high levels of triterpenoids in the exudates define them as promising fractions for the study of antitumor and antimicrobial activities. Reference Simonyan, A.V., Shinkarenko, A.L., Oganesyan E.T. 1972. Quantitative determination of triterpenoids in plants of the genus Thymus. Chemistry of Natural Compounds, 8 (3), 290–291. DOI: 10.1007/bf00563731 Acknowledgment. This work was supported by the National Science Fund, Ministry of Education and Science, Bulgaria, Project DN 16/3.
The geometric complexity of special Lagrangian $T^2$-cones
Creators: name: Haskins, Mark
Publisher: name: arXiv
Year: 2003
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We prove a number of results relating various measures (volume, Legendrian index, stability index, and spectral curve genus) of the geometric complexity of special Lagrangian $T^2$-cones. We explain how these results fit into a program to understand the "most common" three-dimensional isolated singularities of special Lagrangian submanifolds in almost Calabi-Yau manifolds.
description: Revised version accepted for publication in Inventiones Mathematicae. 46 pages, 2 tables. Reference added relating to Theorem B. Section 3.4.2, section 4.2 and Appendix B streamlined. Typographical errors corrected and references updated
Estimating Aggregate Consumption Function Using Random Coefficient Approach: The Australian Case
Creators: name: Hoque, Asraul
name: Hoque, Asraul
Publisher: name: Unknown
Year: 1990
Subjects: Consumer/Household Economics

description: We estimate a Friedman type consumption function incorporating varying coefficient approach to investigate the changing pattern of consumer responses in Australia using quarterly data from 1959IV to 1988IV. The methodology used was that of Hildreth and Houck (1968), Singh et al (1976) and Hogue (1988b). - The Lagrange multiplier test conducted supports the hypothesis of randomness in the response coefficients, suggesting the use of a random coefficient technique rather than an OLS method in estimating our model. We also extended the model by considering separate treatment for both random and the systematic changes in the structural parameters. Our study clearly indicates a strong stickiness in consumer habits and the results also imply that the consumers tend to adapt to changes in income more and more quickly.
Characterization of pellicles formed by Acinetobacter baumannii at the air-liquid interface
Creators: name: Chabane, Yassine Nait
name: Marti, Sara
name: Rihouey, Christophe
name: Alexandre, Stephane
name: Hardouin, Julie
name: Lesouhaitier, Olivier
name: Vila, Jordi
name: Kaplan, Jeffrey B.
name: Jouenne, Thierry
name: De, Emmanuelle
Publisher: name: Public Library of Science
Year: 2023
Subjects: classificationCode: 31
subject: Biological sciences
subject: FOS: Biological sciences

description: The clinical importance of Acinetobacter baumannii is partly due to its natural ability to survive in the hospital environment. This persistence may be explained by its capacity to form biofilms and, interestingly, A. baumannii can form pellicles at the air-liquid interface more readily than other less pathogenic Acinetobacter species. Pellicles from twenty-six strains were morphologically classified into three groups: I) egg-shaped (27%); II) ball-shaped (50%); and III) irregular pellicles (23%). One strain representative of each group was further analysed by Brewster’s Angle Microscopy to follow pellicle development, demonstrating that their formation did not require anchoring to a solid surface. Total carbohydrate analysis of the matrix showed three main components: Glucose, GlcNAc and Kdo. Dispersin B, an enzyme that hydrolyzes poly-Nacetylglucosamine (PNAG) polysaccharide, inhibited A. baumannii pellicle formation, suggesting that this exopolysaccharide contributes to pellicle formation. Also associated with the pellicle matrix were three subunits of pili assembled by chaperonusher systems: the major CsuA/B, A1S_1510 (presented 45% of identity with the main pilin F17-A from enterotoxigenic Escherichia coli pili) and A1S_2091. The presence of both PNAG polysaccharide and pili systems in matrix of pellicles might contribute to the virulence of this emerging pathogen.
Characterization of pellicles formed by Acinetobacter baumannii at the air-liquid interface
Creators: name: Chabane, Yassine Nait
name: Marti, Sara
name: Rihouey, Christophe
name: Alexandre, Stephane
name: Hardouin, Julie
name: Lesouhaitier, Olivier
name: Vila, Jordi
name: Kaplan, Jeffrey B.
name: Jouenne, Thierry
name: De, Emmanuelle
Publisher: name: American University
Year: 2023

description: The clinical importance of Acinetobacter baumannii is partly due to its natural ability to survive in the hospital environment. This persistence may be explained by its capacity to form biofilms and, interestingly, A. baumannii can form pellicles at the air-liquid interface more readily than other less pathogenic Acinetobacter species. Pellicles from twenty-six strains were morphologically classified into three groups: I) egg-shaped (27%); II) ball-shaped (50%); and III) irregular pellicles (23%). One strain representative of each group was further analysed by Brewster’s Angle Microscopy to follow pellicle development, demonstrating that their formation did not require anchoring to a solid surface. Total carbohydrate analysis of the matrix showed three main components: Glucose, GlcNAc and Kdo. Dispersin B, an enzyme that hydrolyzes poly-Nacetylglucosamine (PNAG) polysaccharide, inhibited A. baumannii pellicle formation, suggesting that this exopolysaccharide contributes to pellicle formation. Also associated with the pellicle matrix were three subunits of pili assembled by chaperonusher systems: the major CsuA/B, A1S_1510 (presented 45% of identity with the main pilin F17-A from enterotoxigenic Escherichia coli pili) and A1S_2091. The presence of both PNAG polysaccharide and pili systems in matrix of pellicles might contribute to the virulence of this emerging pathogen.
THE ROLE AND DIRECTIONS OF FINE AND APPLIED ARTS IN BUILDING AN ENLIGHTENED SOCIETY IN NEW UZBEKISTAN
Creators: name: A'zamjonov, Axadjon
Publisher: name: Zenodo
Year: 2025

description: The article studies the theoretical foundations of the socio-philosophical analysis of the place of fine and applied arts in building an enlightened society in New Uzbekistan, the socio-cognitive potential of fine and applied arts in building an enlightened society in New Uzbekistan, the future tasks of developing fine and applied arts in building an enlightened society in New Uzbekistan. Also, the issues of developing fine and applied arts in building an enlightened society in New Uzbekistan are analyzed.
Research E-learning For Children in Grades 1 to 2 Elementary School
Creators: name: Phangiano, Ricky
Publisher: name: figshare
Year: 2020
Subjects: subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: E-learning is a system or concept of education that uses information technology in teaching and learning. This is e-learning that is made only for children in grade 1 through grade 2 of elementary school.