cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hydrophobic Polyelectrolytes in Better Polar Solvent. Structure and Chain Conformation as seen by Saxs and Sans
Creators: name: Essafi, Wafa
name: Spiteri, Marie Noelle
name: Williams, Claudine
name: Boué, François
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We demonstrate in this paper the influence of solvent quality on the structure of the semi-dilute solution of a hydrophobic polyelectrolyte, partially sulfonated Poly-Styrene Sulfonate. Two solvents are used: (i) one mixture of water and an organic solvent: THF, which is also slightly polar; (ii) DMSO, a polar organic solvent. In case (i), it is shown by SAXS study that the structure - namely the scattering from all chains, characterised by a maximum ("polyelectrolyte peak"), of the aqueous hydrophobic polyelectrolyte solutions (PSS) depends on the solvent quality through the added amount of organic solvent THF. This dependence is more pronounced when the sulfonation rate is low (more hydrophobic polyelectrolyte). It is proposed that when THF is added, the chain conformation evolves from the pearl necklace shape already reported in pure water, towards the conformation in pure water for fully sulfonated PSS, which is string-like as also reported previously. On the contrary, for a hydrophilic polyelectrolyte, AMAMPS, no evolution occurs with added THF in the aqueous solution. In case (ii), it is shown directly by SANS study that PSS can behave as a classical solvophilic polyelectrolyte when dissolved in an organic polar solvent such as DMSO: the structure (total scattering) as well as the form factor (single chain scattering measured by SANS using the Zero Average Contrast method) of the PSS chains is independent of the charge content in agreement with Manning condensation, and identical to the one of a fully charged PSS chain in pure water, which has a classical polyelectrolyte behaviour in the semi-dilute regime.
Tails for the Einstein-Yang-Mills system
Creators: name: Pürrer, Michael
name: Aichelburg, Peter C
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study numerically the late-time behaviour of the coupled Einstein Yang-Mills system. We restrict ourselves to spherical symmetry and employ Bondi-like coordinates with radial compactification. Numerical results exhibit tails with exponents close to -4 at timelike infinity $i^+$ and -2 at future null infinity \Scri.
description: 12 pages, 5 figures
Experience, reality and representation : on the implications of a maximally non-deflationary phenomenal realism
Creators: name: Whatley, JP
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis is dedicated to uncovering the conceptual and metaphysical entailments of a form of phenomenal realism I call Robust Realism. I argue that a maximally non-deflationary phenomenal realism of this kind constitutes the only principled form of resistance to Daniel Dennett's eliminativist strategy. I also argue that while Robust Realists constitute a minority within the philosophical community, the deflationist majority have reason to be interested in the results of such a project, as it promises a way beyond the dialogical impasse marking the current qualia debate. I begin by arguing that the definitive commitments of Robust Realism entail a thesis regarding the constitutive nature of phenomenal property instances, that their constitutive nature is exhausted by their experienced nature. From here, I argue that spatiotemporal inclusion and causal interaction, the two principal means of forging a metaphysical connection between experiences and a metaphysically real world, aren't available to Robust Realists. I then argue for a thesis regarding the nature of relations, roughly, that relations necessarily implicate their relata. This thesis forms the basis for my case against the nascent Phenomenal Intentionality Research Program, and combines with other considerations to constitute a case for the impossibility of the kind of transcendentally real representation of phenomenal properties that Robust Realism is founded upon.
Toward Farm Security
Creators: name: Black, A. G.
name: Black, A. G.
Publisher: name: Unknown
Year: 1938
Subjects: Agricultural and Food Policy
Farm Management
Labor and Human Capital
Risk and Uncertainty

description: Excerpt from the report Introduction: The period that is just passing and that seems to be gradually evolving into a new period in agricultural affairs has been marked by a struggle to achieve an improved situation for those engaged in farming. Soon after the World War the slogan of the farm groups was "a fair share of the national income." It was pointed out that farmers as a group were receiving a smaller and smaller proportion of the total national income and that ways and means must be found to restore the balance that existed earlier in our history. It was hoped that price improvement would bring about the desired condition, hence the attempts to secure farm-product price advances by means of tariff increases, McNary-Haugen legislation, and the Federal Farm Board. During the latter part of the period "price parity" was the watchword. This was the standard that guided the activities of those administering the original Agricultural Adjustment Act. Later the price-parity concept was changed to "income parity" — another expression of the determination to achieve a more desirable balance between agricultural and nonagricultural enterprises. In recent years much progress has been made toward the goal of better relative prices and incomes for farmers. The situation has not yet improved to a point where it can be said that farmers are on a basis of economic equality with other groups. But it is nearer that point than it has been for years. Possibly the momentum of improvement will continue so that economic balance between agricultural and nonagricultural groups will be reached.
Simplified TBA equations of the AdS_5 x S^5 mirror model
Creators: name: Arutyunov, Gleb
name: Frolov, Sergey
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the recently found integral representation for the dressing phase in the kinematic region of the mirror theory to simplify the TBA equations for the AdS_5 x S^5 mirror model. The resulting set of equations provides an efficient starting point for both analytic and numerical studies.
description: 17 pages
The road less travelled : a critical realist model for graduate attribute development in higher education
Creators: name: Adams, CA
Publisher: name: University Of Tasmania
Year: 2023

description: This study commenced with an interest in the question: what needs to exist in today's learning environment for students to think, learn and demonstrate the graduate attributes of communication, problem-solving and social responsibility attributes? A theory-building methodology from the critical realism paradigm was used to facilitate an explanation-based case study approach. The process of retroduction was used to develop a novel explanation of graduate attribute development, via access to a stratified reality in which the assumed mechanisms, events and experiences related to graduate attribute development exist. Thus, the study sought to confirm or disconfirm the activation of generative mechanisms and describe the contingent conditions under which graduate attribute development may be enabled or suppressed. The study proceeded through three key phases. First, insights into what the researcher perceives as 'typical' students in the context of graduate attribute development were developed, and then the key challenges facing educators and students in graduate attribute development were considered. From this reflection, and tentative description of the components of a proposed model of graduate attribute development the components were 'redescribed'. Second, by contrasting several theoretical frameworks and interpretations, new insights emerged into the possible transfactual conditions that need to be present for their collective influence upon graduate attribute development. Third, the proposed graduate attribute development model was subject to empirical scrutiny through mixed-method data collection. Support for each developed postulate ultimately iteratively informed a proposed model for graduate attribute development, providing empirical support at the same time. Importantly, during the third phase of the study the specific transfactual conditions that were assumed to exist for a student, educator or the learning environment to contribute to the model were also confirmed. In summary, this study did not aim to test causality in a positivist sense, but rather, develop a model of graduate attribute development that others can now empirically test. The model explains that individual students having certain structures and necessarily possessing certain causal powers that and under specific conditions can potentially produce change: development of graduate attributes (within the context of this study communication, problem-solving and social responsibility), and building student capability and a sense of identity.
An axi-symmetric contact problem : the constriction of elastic cylinders under axial compression
Creators: name: Allwood, Derek Anthony
Publisher: name: University of British Columbia
Year: 2011

description: The compression of fairly short solid cylinders under axial load is considered. A preliminary investigation examines the displacements produced by the superposition of a prescribed surface loading. This is followed by the more interesting problem in which the radial displacement is prescribed over part of the surface, the remaining part of the surface being stress free. Two types of elastic materials are considered; firstly, rubber-like materials governed by a strain energy function of the Mooney form, and secondly, metals which have a quadratic strain energy function. In the former case a finite axial compression is permitted prior to imposing any constraint on the outer curved surface of the cylinder. In all cases the irregularities introduced by the constraints are sufficiently small that they can be described by infinitesimal elasticity theory. The analysis utilizes displacement potential functions and the main problem is reduced to solving a set of dual cosine series. The particular case of the contact problem in which the cylinder height is equal to the radius is examined in detail and the contact stresses are given graphically.
Driving Turbulence and Triggering Star Formation by Ionizing Radiation
Creators: name: Gritschneder, Matthias
name: Naab, Thorsten
name: Walch, Stefanie
name: Burkert, Andreas
name: Heitsch, Fabian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present high resolution simulations on the impact of ionizing radiation of massive O-stars on the surrounding turbulent interstellar medium (ISM). The simulations are performed with the newly developed software iVINE which combines ionization with smoothed particle hydrodynamics (SPH) and gravitational forces. We show that radiation from hot stars penetrates the ISM, efficiently heats cold low density gas and amplifies over-densities seeded by the initial turbulence. The formation of observed pillar-like structures in star forming regions (e.g. in M16) can be explained by this scenario. At the tip of the pillars gravitational collapse can be induced, eventually leading to the formation of low mass stars. Detailed analysis of the evolution of the turbulent spectra shows that UV-radiation of O-stars indeed provides an excellent mechanism to sustain and even drive turbulence in the parental molecular cloud.
description: 5 pages, 2 figures, accepted by ApJ Letters
Great House Formation: Agricultural Intensification, Balanced Duality, and Communal Enterprise at Mitchell Springs, Vol 87-1 SOUTHWESTERN LORE Spring 2021.pdfGreat House Formation: Agricultural Intensification, Balanced Duality, and Communal Enterprise at Mitchell Springs
Creators: name: Dove, David
Publisher: name: figshare
Year: 2021
Subjects: Archaeology

description: This article explores the ties between agricultural intensification and the rise of elite entities in the Mitchell Springs watershed located in Southwest Colorado in the Mesa Verde region. Formation process leading to the construction of a great house and tri-wall building, feasting, and dual entity social leadership are explored.
Merging of Dirac points in a two-dimensional crystal
Creators: name: Montambaux, G.
name: Piechon, F.
name: Fuchs, J. -N.
name: Goerbig, M. O.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study under which general conditions a pair of Dirac points in the electronic spectrum of a two-dimensional crystal may merge into a single one. The merging signals a topological transition between a semi-metallic phase and a band insulator. We derive a universal Hamiltonian that describes the physical properties of the transition, which is controlled by a single parameter, and analyze the Landau-level spectrum in its vicinity. This merging may be observed in the organic salt alpha-(BEDT-TTF)_2 I_3 or in an optical lattice of cold atoms simulating deformed graphene.
description: 4 pages, 5 figures,
Massive star formation in Wolf-Rayet galaxies: II. Optical spectroscopy results
Creators: name: Lopez-Sanchez, Angel R.
name: Esteban, Cesar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (Abridged) We have performed a comprehensive multiwavelength analysis of a sample of 20 starburst galaxies that show the presence of a substantial population of very young massive stars. In this paper, the second of the series, we present the results of the analysis of long-slit intermediate-resolution spectroscopy of star-formation bursts for 16 galaxies of our sample. We study the spatial localization of the WR stars in each galaxy. We analyze the excitation mechanism and derive the reddening coefficient, physical conditions and chemical abundances of the ionized gas. We study the kinematics of the ionized gas to check the rotation/turbulence pattern of each system. When possible, tentative estimates of the Keplerian mass of the galaxies have been calculated. Our analysis has revealed that a substantial fraction of the galaxies show evidences of perturbed kinematics. With respect to the results found in individual galaxies, we remark the detection of objects with different metallicity and decoupled kinematics in Haro 15 and Mkn 1199, the finding of evidences of tidal streams in IRAS 08208+2816, Tol 9 and perhaps in SBS 1319+579, and the development of a merging process in SBS 0926+606 A and in Tol 1457-262. All these results reinforce the hypothesis that interactions with or between dwarf objects is a very important mechanism in the triggering of massive star formation in starburst galaxies, specially in dwarf ones. It must be highlighted that only deep and very detailed observationscan provide clear evidences that these subtle interaction processes are taking place.
description: Accepted in A&A. 51 pages, 40 Figures, 19 Tables. Full Version: http://www.atnf.csiro.au/people/Angel.Lopez-Sanchez/papers/MSFinWRG_II_main_ACCEPTED_26sep09.pdf
Rate of convergence of predictive distributions for dependent data
Creators: name: Berti, Patrizia
name: Crimaldi, Irene
name: Pratelli, Luca
name: Rigo, Pietro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: This paper deals with empirical processes of the type \[C_n(B)=\sqrt{n}\{μ_n(B)-P(X_{n+1}\in B\mid X_1,...,X_n)\},\] where $(X_n)$ is a sequence of random variables and $μ_n=(1/n)\sum_{i=1}^nδ_{X_i}$ the empirical measure. Conditions for $\sup_B|C_n(B)|$ to converge stably (in particular, in distribution) are given, where $B$ ranges over a suitable class of measurable sets. These conditions apply when $(X_n)$ is exchangeable or, more generally, conditionally identically distributed (in the sense of Berti et al. [Ann. Probab. 32 (2004) 2029--2052]). By such conditions, in some relevant situations, one obtains that $\sup_B|C_n(B)|\stackrel{P}{\to}0$ or even that $\sqrt{n}\sup_B|C_n(B)|$ converges a.s. Results of this type are useful in Bayesian statistics.
description: Published in at http://dx.doi.org/10.3150/09-BEJ191 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Real-time gauge theory simulations from stochastic quantization using optimized updating
Creators: name: Sexty, Denes
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Stochastic quantisation is applied to the problem of calculating real-time evolution on a Minkowskian space-time lattice. We employ optimized updating using reweighting, or gauge fixing, respectively. These procedures do not affect the underlying theory, but strongly improve the stability properties of the stochastic dynamics.
description: 4 pages, 3 figures, contributed talk to SEWM 2008, Amsterdam
Additional file 1 of What is the right sequencing approach? Solo VS extended family analysis in consanguineous populations
Creators: name: Alfares, Ahmed
name: Alsubaie, Lamia
name: Aloraini, Taghrid
name: Alaskar, Aljoharah
name: Althagafi, Azza
name: Alahmad, Ahmed
name: Rashid, Mamoon
name: Alswaid, Abdulrahman
name: Alothaim, Ali
name: Eyaid, Wafaa
name: Ababneh, Faroug
name: Albalwi, Mohammed
name: Alotaibi, Raniah
name: Almutairi, Mashael
name: Altharawi, Nouf
name: Alsamer, Alhanouf
name: Abdelhakim, Marwa
name: Kafkas, Senay
name: Mineta, Katsuhiko
name: Cheung, Nicole
name: Abdallah, Abdallah
name: Büchmann-Møller, Stine
name: Fukasawa, Yoshinori
name: Zhao, Xiang
name: Rajan, Issaac
name: Hoehndorf, Robert
name: Al Mutairi, Fuad
name: Gojobori, Takashi
name: Alfadhel, Majid
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Computational Biology

description: Additional file 1.
ЧТО НЕ ТАК С НАШЕЙ ПОЛОВОЙ КОНСТИТУЦИЕЙ?
Creators: name: Инга Грин
Publisher: name: Психология и психотерапия семьи
Year: 2023

description: Нарративная практика — область психотерапии, школа психотерапевтической и социальной работы, которая много внимания уделяет влиянию общества на человека. Одна из важнейших идей нарративной психотерапии — экстернализация. Если попробовать ее обозначить на практике: проблема в проблеме, а не в человеке. Данная лекция (мы приводим ее расшифровку) рассказывает о том, как и в чем идея половой конституции создает людям проблемы и как можно от некоторых из этих проблем освобождаться. Я предложу вам знание, но это не значит, что вы должны им пользоваться как истиной в последней инстанции. Нарративная практика предлагает смотреть на любое знание как на знание в контексте, в среде. Его говорит кто-то кому-то зачем-то. В моем знании, которое я сегодня буду предлагать, есть моя большая личная заинтересованность. Мне как помогающей специалистке хотелось бы, чтобы у идеи половой конституции стало несколько меньше могущества в нашем текущем обществе.
Barnett Effect in Thin Magnetic Films and Nanostructures
Creators: name: Bretzel, Stefan
name: Bauer, Gerrit E. W.
name: Tserkovnyak, Yaroslav
name: Brataas, Arne
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Barnett effect refers to the magnetization induced by rotation of a demagnetized ferromagnet. We describe the location and stability of stationary states in rotating nanostructures using the Landau-Lifshitz-Gilbert equation. The conditions for an experimental observation of the Barnett effect in different materials and sample geometries are discussed.
description: 4 pages, 2 figures
Matricial and vectorial norms
Creators: name: Kahlon, Gurdeep Singh
Publisher: name: University of British Columbia
Year: 2011

description: Matricial norms, minimal matricial norms, vectorial norms and vectorial norms subordinate to matricial norms, which are respectively generalizations of matrix norms, minimal matrix norms, vector norms and vectorial norms subordinate to matrix norms, are defined and their various applications and properties are discussed.
Gas Stripping in Simulated Galaxies with a Multiphase ISM
Creators: name: Tonnesen, Stephanie
name: Bryan, Greg L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cluster galaxies moving through the intracluster medium (ICM) are expected to lose some of their interstellar medium (ISM) through ISM-ICM interactions. We perform high resolution (40 pc) three-dimensional hydrodynamical simulations of a galaxy undergoing ram pressure stripping including radiative cooling in order to investigate stripping of a multiphase medium. The clumpy, multiphase ISM is self-consistently produced by the inclusion of radiative cooling, and spans six orders of magnitude in gas density. We find no large variations in the amount of gas lost whether or not cooling is involved, although the gas in the multiphase galaxy is stripped more quickly and to a smaller radius. We also see significant differences in the morphology of the stripped disks. This occurs because the multiphase medium naturally includes high density clouds set inside regions of lower density. We find that the lower density gas is stripped quickly from any radius of the galaxy, and the higher density gas can then be ablated. If high density clouds survive, through interaction with the ICM they lose enough angular momentum to drift towards the center of the galaxy where they are no longer stripped. Finally, we find that low ram pressure values compress gas into high density clouds that could lead to enhanced star formation, while high ram pressure leads to a smaller amount of high-density gas.
description: 17 pages, 12 figures, accepted in ApJ
Embeddedness and Neo-Endogenous Regional Development: Insights from the Central Region of Ghana
Creators: name: Isabella, Green
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Endogenous regional development; neo-endogenous regional development;

description: The study aimed to explore, analyse, assess and reflect on embeddedness of two endogenous regional development institutions, CEDECOM and GHCT, and their impact on the Central Region space economy, against failure of exogenous regional development to deliver. It based on a combination of relevant concepts of embeddedness and related criteria of neo-endogenous institutional development, in a wattle-and-daub fashion, using secondary material derived from literature review and primary data collected through in-depth field interviews, with CEDECOM and GHCT seen as case studies.  GHCT demonstrated social embeddedness through various institutional structures, cultural embeddedness in valuing the importance of the Mesomagor Bamboo Orchestra and tourism sector operators, and particularly functional-spatial embeddedness in its external contacts and networks. But it was equally limited in social and political embeddedness in low inclusiveness and participation in the economy and governance of the Kakum National Park. It was also challenged in terms of fairly poor economic activity organisation, limited participation in socio-economic activities, declining tourist visits, less financial performance and low planning capacity. CEDECOM was more socially embedded in local delivery and relational contexts, internal resource mobilisation, socio-economic and business development support, underlying institutional structures and networks, human capacity development. Similarly, its functional-spatial embeddedness was limited in its irregular external contacts and visibility in the cities, apart from less technological development and innovations and organisational capacity
Additional file 1 of Histopathological distinction of non-invasive and invasive bladder cancers using machine learning approaches
Creators: name: Yin, Peng-Nien
name: KC, Kishan
name: Wei, Shishi
name: Yu, Qi
name: Li, Rui
name: Haake, Anne R.
name: Miyamoto, Hiroshi
name: Cui, Feng
Publisher: name: figshare
Year: 2020
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1.
Approaching multichannel Kondo physics using correlated bosons: Quantum phases and how to realize them
Creators: name: Lal, Siddhartha
name: Gopalakrishnan, Sarang
name: Goldbart, Paul M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We discuss how multichannel Kondo physics can arise in the setting of a localized level coupled to several bosonic Tomonaga-Luttinger liquid leads. We propose one physical realization involving ultracold bosonic atoms coupled to an atomic quantum dot, and a second, based on superconducting nanowires coupled to a Cooper-pair box. The corresponding zero-temperature phase diagram is determined via an interplay between Kondo-type phenomena arising from the dot and the consequences of direct inter-lead hopping, which can suppress the Kondo effect. We demonstrate that the multichannel Kondo state is stable over a wide range of parameters. We establish the existence of two nontrivial phase transitions, involving a competition between Kondo screening at the dot and strong correlations either within or between the leads (which respectively promote local number- and phase-pinning). These transitions coalesce at a self-dual multicritical point.
description: 5 pages, 4 figures
Greathouse Formation: Agricultural Intensification, Balanced Duality, and Communal Enterprise at Mitchell Springs, Vol 87-1 SOUTHWESTERN LORE Spring 2021.pdf
Creators: name: Dove, David
Publisher: name: figshare
Year: 2021
Subjects: Archaeology

description: This article explores the ties between agricultural intensification and the rise of elite entities in the Mitchell Springs watershed located in Southwest Colorado in the Mesa Verde region. Formation process leading to the construction of a greathouse and tri-wall building, feasting, and dual entity social leadership are explored.
Investigation of Gully Erosion in Owerri, Southeastern Nigeria Using Landsat (ETM) and Aeromagnetic Data
Creators: name: Michael, Thompson
name: Sarah, Brown
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Remote Sensing, Gully Erosion, Aeromagnetic Data, Lineament, TMI, Land Sat

description: Gully erosion is the most obvious form of soil erosion in southeastern Nigeria mainly because of the remarkable impressions the gullies make which are also visible manifestation of the physical loss of land that will have been used for Agriculture and infrastructural development. Gully erosion is a well-defined water worn channel. Gully erosion, the most impressive and striking erosion type, has been recognized as one of the major global environmental problems. Observations have shown clearly that gully erosion is more prevalent in sedimentary terrain than in the basement complex of Nigeria. This erosion activity at various scales has resulted in the loss of lives and properties almost on a yearly basis. This work is about gully erosion study of Owerri using remote sensing and aeromagnetic data. This study is aimed at giving a detailed interpretation of the remote sensing and aeromagnetic data of the study area. This work identifies and studies gully erosion in the study area, Owerri and its environs in Imo State, South Eastern Nigeria which is located between latitude 5.18° – 5.39° N and longitude 6.51°- 7.08° E. Aeromagnetic data (maps) where acquired from Nigerian geological survey Abuja the images was obtained using land sat ETM sensor with band combination 2,3 and 4 with resolution of 30m. The processing of the land sat images and the aeromagnetic data where done using ILWIS 8.0 and 10.0, ILWIS Academia, ARC GIS, ERDAS, Q GIS. These software’s have the capacities of carrying various data enhancement techniques such as linear enhancement, statistical analysis, principal component analysis. The interpretation of aeromagnetic survey data is aimed at mapping the subsurface and the subsurface regional structures such as faults, folds, contacts, bodies and vegetation.
A quantitative explanation of the observed population of Milky Way satellite galaxies
Creators: name: Koposov, Sergey E.
name: Yoo, Jaiyul
name: Rix, Hans-Walter
name: Weinberg, David H.
name: Macciò, Andrea V.
name: Miralda-Escudé, Jordi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We revisit the well known discrepancy between the observed number of Milky Way (MW) dwarf satellite companions and the predicted population of cold dark matter (CDM) sub-halos, in light of the dozen new low luminosity satellites found in SDSS imaging data and our recent calibration of the SDSS satellite detection efficiency, which implies a total population far larger than these dozen discoveries. We combine a dynamical model for the CDM sub-halo population with simple, physically motivated prescriptions for assigning stellar content to each sub-halo, then apply observational selection effects and compare to the current observational census. As expected, models in which the stellar mass is a constant fraction F(Omega_b/Omega_m) of the sub-halo mass M_sat at the time it becomes a satellite fail for any choice of F. However, previously advocated models that invoke suppression of gas accretion after reionization in halos with circular velocity v_c
description: 18 pages, 14 figures, accepted to ApJ. Minor changes following referees report
Rapid phase-diffusion between atomic and molecular Bose-Einstein condensates
Creators: name: Tikhonenkov, I.
name: Vardi, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the collisional loss of atom-molecule coherence after coherently dissociating a small fraction of a molecular Bose-Einstein condensate into atoms. The obtained $n$-atoms states are two-atom (SU(1,1)) coherent states with number variance $Δn\propto n$ compared to $Δn\propto \sqrt{n}$ for the spin (SU(2)) coherent states formed by coherent splitting of an atomic condensate. Consequently, the Lorentzian atom-molecule phase-diffusion is faster than the Gaussian phase-diffusion between separated atomic condensates, by a $\sqrt{n}$ factor.
description: 4 pages, 3 figures
Evolutionary game dynamics in a growing structured population
Creators: name: Poncela, J.
name: Gomez-Gardenes, J.
name: Traulsen, A.
name: Moreno, Y.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We discuss a model for evolutionary game dynamics in a growing, network-structured population. In our model, new players can either make connections to random preexisting players or preferentially attach to those that have been successful in the past. The latter depends on the dynamics of strategies in the game, which we implement following the so-called Fermi rule such that the limits of weak and strong strategy selection can be explored. Our framework allows to address general evolutionary games. With only two parameters describing the preferential attachment and the intensity of selection, we describe a wide range of network structures and evolutionary scenarios. Our results show that even for moderate payoff preferential attachment, over represented hubs arise. Interestingly, we find that while the networks are growing, high levels of cooperation are attained, but the same network structure does not promote cooperation as a static network. Therefore, the mechanism of payoff preferential attachment is different to those usually invoked to explain the promotion of cooperation in static, already-grown networks.
description: 18 pages. IOP style. To appear in New Journal of Physics
The chemical stability of heavy metal xanthates
Creators: name: Sheikh, Naseeruddin
Publisher: name: University of British Columbia
Year: 2011

description: The precipitation of lead, copper and iron xanthates was studied as a function of metal and xanthate ion concentration. These precipitates were suspended in aqueous solutions of pH 3.5 to 11.5 and 25° to 60°C. The concentrations of xanthate and metal ions obtained upon dissolution of the metal xanthates were measured to establish their solubilities as functions of pH and temperature. The concurrent hydrolysis and decomposition of these ions led to the formation of insoluble products such as metal sulphides, hydrated oxides and carbonates. These became deposited on the undissolved fraction of the metal xanthate precipitate. The ultraviolet and infrared spectroscopic methods and X-ray diffraction, differential thermal analysis and vapour phase chromatography were used to characterise the products of decomposition. The state of oxidation of copper and iron in the corresponding metal xanthate was investigated with the aid of EPR, ESCA and studies of the Mossbauer effect. Cuprous and ferric ethylxanthates were found to be the stable forms. Ferrous ions did not react with xanthate ions. A hydroxyxanthate of iron was detected at pH 5 to 6 by Mossbauer study. The optimum pH for the formation of dixanthogen in Fe³⁺/(EtX)⁻ system was found to be in the range of 2.5 to 3.7.
StadsOase Symposium rond Duurzaamheid - Citizen Science in de Buurten
Creators: name: Gold, Margaret
Publisher: name: Zenodo
Year: 2024

description: StadsOase Symposium rond Duurzaamheid

Datum

vrijdag 27 september 2024

Tijd

14:30 - 17:30 uur

Locatie

StadsOase SpinozahofRepelaerstraat 612515 LX Den Haag

Wetenschappers, ambtenaren en buurtbewoners verenigd rond duurzaamheid

De Universiteit Leiden werkt op velerlei manieren aan duurzaamheid.Zo is het Liveable Planet Programma opgericht om gebruik te maken van de expertises en kennisterreinen van verschillende faculteiten bij duurzaamheidonderzoek. Ook werken we met gemeente en bewoners aan uiteenlopende initiatieven en onderzoeken op het terrein van de energie transitie en biodiversiteit. Deze middag zetten we een aantal bestaande initiatieven in het zonnetje ,maar gaan we vooral ook met elkaar opzoek naar verdere mogelijkheden voor samenwerking en onderzoek rond duurzaamheid.

Doe mee en meld je aan. * Het volledige prorgramma is in het Nederlands* The entire program will be in Dutch

Meld je aan!
Aanmelden

Het programma

Het programma van de inspiratiemiddag ziet er als volgt uit. 

14:30 - 14:35

Welkom en uitleg  programma

14:35 - 15:00

Keynote “De transitie van onderop” door  Kees Vendrik, Voorzitter van het Nationaal Klimaat Platform

15:00 - 15:10

"Duurzaamheidbeleid binnen de Universiteit" door Jan Willem Erisman Hoogleraar Environmental sustainability 

15:10- 15:25

Rondje langs Duurzaamheid programma's en onderzoeken van de Universiteit.  Presentaties en Pitches

15:30- 16:30

Keuzeprogramma:

 

Wat is een eerlijke energietransitie? Serious Game - Annemiek de Looze & Sander ten Caat. (NB: neem voor deelename aan de game een eigen laptop mee)

 

Citizen Science in de buurten en praktijk gebracht -Presentatie en vraaggesprek - Hidde Kamst, Roy Remme, Margret Gold

 

Voedselsoevereiniteit & Voedselverbindingsplekken- presentatie en vraaggesprek - Liane Lankreijer

 

Hoe creëer je een Stadsoase -Excursie, uitleg en vragen - Marianne Edixhoven

16:30 - 17:30

Napraten en netwerken met hapje, drankje en life muziek

Het wordt een middag waar wetenschappers, ambtenaren en buurtbewoners zich verenigen rond duurzaamheid. Tussen het groen van Stads Oase Spinozahof in de Haagse kunnen we nieuwe ideeën doen ontspruiten. Na de plenaire aftrap volgt een sessies of activiteit naar keuze. We sluiten hierna gezamenlijk af met een hapjes, drankjes en muziek in het hof.
Hydrodynamical Collapse of Neutron Stars due to Hadron-Quark Phase Transition
Creators: name: Marranghello, G. F.
name: de Araujo, J. C. N.
name: Miranda, O. D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present studies of the collapse of neutron stars that undergo a hadron-quark phase transition. A spherical Lagrangian hydrodynamic code has been written. As initial condition we take different neutron star configurations taking into account its density, energy density and pressure distribution. The phase transition is imposed at different evolution times. We have found that a significant amount of matter on the surface can be ejected while the remaining star rings in the fundamental and first pressure modes.
description: 6 pages, 5 figures
Sensitivity of p modes for constraining velocities of microscopic diffusion of the elements
Creators: name: Creevey, Orlagh L.
name: Mathur, Savita
name: García, Rafael A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Conventional astrophysical observations have failed to provide stringent constraints on physical processes operating in the interior of the stars. However, satellite missions now promise a solution to these problems by providing long-term high-quality continuous data which will allow the application of seismic techniques. With this in mind, and using the Sun as our astrophysical laboratory, our aim is to determine if Corot- and Kepler-like asteroseismic data can constrain physical processes like microscopic diffusion. We test to what extent can the observed atmospheric abundances coupled with p-mode frequencies safely distinguish between stellar initial chemical composition and diffusion of these elements. We present some preliminary results of our analysis.
description: 4 pages, poster presentation: GONG 2008/SOHO XXI: Solar-stellar dynamos as revealed by helio- and asteroseismology, August 2008, Boulder, Colorado v2: correction to author name
Empirical Constraints on Proton and Electron Heating in the Fast Solar Wind
Creators: name: Cranmer, Steven R.
name: Matthaeus, William H.
name: Breech, Benjamin A.
name: Kasper, Justin C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We analyze measured proton and electron temperatures in the high-speed solar wind in order to calculate the separate rates of heat deposition for protons and electrons. When comparing with other regions of the heliosphere, the fast solar wind has the lowest density and the least frequent Coulomb collisions. This makes the fast wind an optimal testing ground for studies of collisionless kinetic processes associated with the dissipation of plasma turbulence. Data from the Helios and Ulysses plasma instruments were collected to determine mean radial trends in the temperatures and the electron heat conduction flux between 0.29 and 5.4 AU. The derived heating rates apply specifically for these mean plasma properties and not for the full range of measured values around the mean. We found that the protons receive about 60% of the total plasma heating in the inner heliosphere, and that this fraction increases to approximately 80% by the orbit of Jupiter. A major factor affecting the uncertainty in this fraction is the uncertainty in the measured radial gradient of the electron heat conduction flux. The empirically derived partitioning of heat between protons and electrons is in rough agreement with theoretical predictions from a model of linear Vlasov wave damping. For a modeled power spectrum consisting only of Alfvenic fluctuations, the best agreement was found for a distribution of wavenumber vectors that evolves toward isotropy as distance increases.
description: 11 pages (emulateapj style), 5 figures, ApJ, in press
Fostering social norms for sustainability : a comparison of two community socioeconomic initiatives
Creators: name: Krabbe, R
Publisher: name: University Of Tasmania
Year: 2023

description: In the socioeconomics literature, community socioeconomic initiatives (CSIs) are identified as important institutions for achieving sustainability. In this literature, CSIs are argued to contribute to sustainability by fostering a set of compatible social norms of reciprocity, equity, deliberation and sufficiency. This dissertation investigates the potential of CSIs to foster such sustainability norms by comparing and contrasting two different CSI types: community supported agriculture (CSA) and local exchange trading systems (LETS). To undertake the comparison, each sustainability norm is further elaborated in indicators linked to their capacity to encourage volunteering, redistribution, dematerialization, prosumption and purposeful social interaction. Drawing on literature reviews of international case studies and participant-observation and interviews of two Tasmanian CSIs, the research finds that while both types of CSIs foster sustainability norms, they do so in different ways and to different degrees. The research has important implications for sustainability strategies as it implies that a diversity of CSIs are required to foster the full suite of sustainability norms.
Realistic Composite Higgs Models
Creators: name: Anastasiou, Charalampos
name: Furlan, Elisabetta
name: Santiago, Jose
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the role of fermionic resonances in realistic composite Higgs models. We consider the low energy effective description of a model in which the Higgs arises as the pseudo-Goldstone boson of an SO(5)/SO(4) global symmetry breaking pattern. Assuming that only fermionic resonances are present below the cut-off of our effective theory, we perform a detailed analysis of the electroweak constraints on such a model. This includes the exact one-loop calculation of the T parameter and the anomalous Zbb coupling for arbitrary new fermions and couplings. Other relevant observables, like b to s gamma and Delta B=2 processes have also been examined. We find that, while minimal models are difficult to make compatible with electroweak precision tests, models with several fermionic resonances, such as the ones that appear in the spectrum of viable composite Higgs models from warped extra dimensions, are fully realistic in a large region of parameter space. These fermionic resonances could be the first observable signature of the model at the LHC.
description: 33 pages, 8 figures
Technology acceptance, organisational change and autonomous motivation : reducing the crowding-out effect in the non-profit sector
Creators: name: Howard, NL
Publisher: name: University Of Tasmania
Year: 2023

description: The non-profit sector worldwide has undergone significant change brought about by public sector reforms with the introduction of New Public Management practices. The associated outsourcing of social services has shifted accountability to non-profit organisations (NPOs) and they are being forced to develop and expand their ICT capacity to meet various government reporting obligations. However, ICT-induced organisational change within NPOs has proved problematic, often leading to failure. This thesis focuses on medium and large scale NPOs delivering social services on behalf of government. Not all change management and other business practices from the private and public sectors are suitable for use in NPOs (despite these being imposed upon them) due to differences in the authority structures, mission, culture and motivation factors of non-profit workers. It has been demonstrated that the motivation of workers (a key differentiator between the sectors) to undertake and persist with organisational change and accept technology is crucial for success; and it is particularly important for NPOs to maintain worker motivation when undergoing change. The empirical investigation component of this research project was informed by means of a critical analysis and synthesis of the literature in a range of reference disciplines, which provided a strong theoretic framework for the remainder of the work. Key initial theoretical foundations of the project include: the dissection of motivation informed by Self Determination Theory; Frey's Motivation Crowding Theory and the substantial literature concerning technology acceptance, rooted in Davies' TAM, which underpins much thought within the Information Systems community about employee acceptance of technology. Using a multi-cycle Action Research study undertaken within an exemplar NPO, the project focused on the creation, testing and refinement of an autonomously-supportive organisational change implementation strategy; and the development of an associated Motivational Technology Acceptance Model (MTAM) suitable for NPOs. The autonomously supportive interventions promoted internalisation of the change process, leading to the use of a more integrated or identified type of self-regulation as well as evidence of a more autonomous type of motivation to accept the change. This, in turn, reduced the crowding-out effect caused during the implementation of the change process. In addition to offering a path reducing long term failure rates in NPOs' organisational change projects, this thesis provides the IS community more broadly a deeper and more thoughtful treatment of motivation, offering practical guidance to NPO managers implementing an ICT-induced organisational change.
Distributions of the Phase Angle of the Fermion Determinant in QCD
Creators: name: Lombardo, M. P.
name: Splittorff, K.
name: Verbaarschot, J. J. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The distribution of the phase angle and the magnitude of the fermion determinant as well as its correlations with the baryon number and the chiral condensate are studied for QCD at non zero quark chemical potential. Results are derived to one-loop order in chiral perturbation theory. We find that the distribution of the phase angle is Gaussian for small chemical potential and a periodic Lorentzian when the quark mass is inside the support of the Dirac spectrum. The baryon number and chiral condensate are computed as a function of the phase of the fermion determinant and we discuss the severe cancellations which occur upon integration over the angle. We compute the distribution of the magnitude of the fermion determinant as well as the baryon number and chiral condensate at fixed magnitude. Finally, we consider QCD in one Euclidean dimension where it is shown analytically, starting from the fundamental QCD partition function, that the distribution of the phase of the fermion determinant is a periodic Lorentzian when the quark mass is inside the spectral density of the Dirac operator.
description: 22 pages, 4 figures