cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PROMOTION OF CROSS-SECTORAL PARTNERSHIPS AS AN ELEMENT ENHANCING LOCAL GOVERNMENT DEVELOPMENT AND COMPETITIVENESS
PROMOCJA PARTNERSKIEJ WSPÓŁPRACY MIĘDZYSEKTOROWEJ JAKO ELEMENT ROZWOJU I PODNOSZENIA KONKURENCYJNOŚCI JEDNOSTEK SAMORZĄDU TERYTORIALNEGO
Creators: name: Sikorska-Wolak, Izabella
name: Iwanska, Magdalena
name: Sikorska-Wolak, Izabella
name: Iwanska, Magdalena
Publisher: name: Unknown
Year: 2012
Subjects: subject: Community/Rural/Urban Development
subject: Industrial Organization
subject: cross-sector partnership
subject: local development
subject: competitiveness
subject: rural counties
subject: local action groups

description: This paper presents the principles of inter-sectoral cooperation and forms of its local incidence. The analysis examines the functioning of local action groups in the Mazowieckie Voivodship, and shows an association between willingness to undertake the inter-sectoral cooperation and the rural county level of development and competitiveness of in Mazowieckie Voivodship.
title: Development of Novel Antitumour Therapeutics Based on DNA Aptamers Against the MUC1/Y Protein
Creators: name: Makwana, Vaidehi
Publisher: name: The Open University
Year: 2012

description: Alterations in the expression of vital proteins of the cellular signalling pathways are at the forefront of molecular abnormalities established in cancer. Therefore, to understand the fundamental mechanisms of cancer initiation and progression, characterisation of tumour markers, such as key proteins like MUC1/Y that are highly expressed in malignant cells, is crucially important. Rapid drug discovery is a pressing need in the pharmaceutical industry. Agents that are able to bind tightly and selectively to the surface of diseased cells would greatly benefit both disease diagnosis and treatment. An aptamer is a functional oligonucleotide that has the appropriate sequence and structure to form a complex, possessing great affinity and selectivity for its target. Aptamers of high affinity and specificity have been successfully generated against the MUC1/Y splice variant from a non-conventional single round SELEX system termed SimpLex. The 72 base long aptamers were truncated to an ideal therapeutic length of 25 bases long via two different means. The first entails eliminating the primers and leaving only the central variable region and the second involves truncation of the aptamers based on their predicted secondary structure. Thus, three aptamer versions were taken for further investigation, the complete and two truncated ones. However, as is it often the case, aptamers lack in vivo stability and are prone to rapid renal filtration and therefore require modification to achieve their full potential in vivo as therapeutic agents. Thus, the MUC1/Y selected aptamers were conjugated with a 32 kDa polyethylene glycol (PEG) polymer to increase their molecular weight to ca. 40 kDa, an appropriate size to avoid rapid renal clearance. The truncated aptamers, the pegylated aptamers and the full length aptamers were characterised employing qualitative techniques which include EMSA, affinity column chromatography and DNA thermal denaturation studies. The aptamers were further assessed for their binding, specificity and internalisation by FACs and fluorescence microscopy. The characterisation studies have shown that the anti-MUC1/Y aptamers possess affinity and specificity for the MUC1/Y protein and the conjugation of the aptamers to PEG has further enhanced their binding and internalisation potential. These encouraging results display potential future prospects as therapeutic agents for the pegylated aptamers and warrants their further future evaluation in in vivo studies.
LOCAL ACTION GROUPS - A FORM OF PROMOTION AND MANAGEMENT OF RURAL AREAS
LOKALNE GRUPY DZIAŁANIA ȃ FORMA PROMOCJI I ZARZĄDZANIA OBSZARAMI WIEJSKIMI
Creators: name: Zimny, Artur
name: Zimny, Artur
Publisher: name: Unknown
Year: 2012
Subjects: subject: Community/Rural/Urban Development
subject: Farm Management
subject: LAG
subject: rural areas
subject: promotion
subject: management

description: The article attempts to prove that the Local Action Groups (LAGs) are the form of rural area promotion and management according to the provisions contained in their internal documents. The thesis has been veriϐied by analyzing the content of statutes and local development strategies prepared by seven LAGs, which form legal associations and operate in the subregion Konin. In particular, the study analyzes portions of statutes concerning the aims and missions of associations, general and speciϐic objectives included in local development strategies. The results of the analysis allow to positively verify the thesis. First, the statutes of all LAGs underline in their objectives the need to advance sustainable and multifunctional development of rural areas and the need to promote these areas. Second, the local development strategies have outlined the hierarchy of objectives and ways of their implementation what should be regarded as an expression of strategic planning, and thus an element of the local development management. In addition, it should be emphasized that the existence of the LAG’s development strategy is a testimony to efforts to improve the management of the areas where these groups are located.
Spin fluctuations influence on quasiparticle spectrum of realistic p-d model
Creators: name: Korshunov, Maxim M.
name: Ovchinnikov, Sergei G.
name: Sherman, Alexei V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the present work the multiband p-d model for $CuO_2$-layer is treated. It was shown that for the realistic set of parameters besides Zhang-Rice two-particle singlet there is non-negligible contribution of two-particle triplet state to the top of the valence band. Also shown, that to gain quantitative agreement with experimental data the minimal approximation should include the spin fluctuations beyond the Hubbard-I scheme. Quasiparticle spectrum, obtained in this approximation, is in fairly good agreement with ARPES data on Bi2212 High-$T_c$ compound.
description: Submitted to ICM 2003 Conference 3 pages, 2 figures
The quantum non-linear Schrodinger model with point-like defect
Creators: name: Caudrelier, V.
name: Mintchev, M.
name: Ragoucy, E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We establish a family of point-like impurities which preserve the quantum integrability of the non-linear Schrodinger model in 1+1 space-time dimensions. We briefly describe the construction of the exact second quantized solution of this model in terms of an appropriate reflection-transmission algebra. The basic physical properties of the solution, including the space-time symmetry of the bulk scattering matrix, are also discussed.
description: Comments on the integrability and the impurity free limit added
Algorithmic Cooling of Spins: A Practicable Method for Increasing Polarization
Creators: name: Fernandez, Jose M.
name: Lloyd, Seth
name: Mor, Tal
name: Roychowdhury, Vwani
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An efficient technique to generate ensembles of spins that are highly polarized by external magnetic fields is the Holy Grail in Nuclear Magnetic Resonance (NMR) spectroscopy. Since spin-half nuclei have steady-state polarization biases that increase inversely with temperature, spins exhibiting high polarization biases are considered cool, even when their environment is warm. Existing spin-cooling techniques are highly limited in their efficiency and usefulness. Algorithmic cooling is a promising new spin-cooling approach that employs data compression methods in open systems. It reduces the entropy of spins on long molecules to a point far beyond Shannon's bound on reversible entropy manipulations (an information-theoretic version of the 2nd Law of Thermodynamics), thus increasing their polarization. Here we present an efficient and experimentally feasible algorithmic cooling technique that cools spins to very low temperatures even on short molecules. This practicable algorithmic cooling could lead to breakthroughs in high-sensitivity NMR spectroscopy in the near future, and to the development of scalable NMR quantum computers in the far future. Moreover, while the cooling algorithm itself is classical, it uses quantum gates in its implementation, thus representing the first short-term application of quantum computing devices.
description: 24 pages (with annexes), 3 figures (PS). This version contains no major content changes: fixed bibliography & figures, modified acknowledgements
Vibilia australis Stebbing 1888
Creators: name: SHIH, CHANG-TAI
name: HENDRYCKS, ED A.
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Vibiliidae
Vibilia
Vibilia australis

description: Vibilia australis Stebbing, 1888
(figures 3, 4)
 Vibilia australis Stebbing, 1888: 1287–1290, pl. 149.
 Vibilia seriocellatus Stephensen, 1932: 498–501, figure 5.
description: Published as part of SHIH, CHANG-TAI & HENDRYCKS, ED A., 2003, A new species and new records of the genus Vibilia Milne Edwards, 1830 (Amphipoda: Hyperiidea: Vibiliidae) occurring in the eastern Pacific Ocean, pp. 253-296 in Journal of Natural History 37 (3) on page 273, DOI: 10.1080/713834685, http://zenodo.org/record/4653315
PT-symmetric regularizations in supersymmetric quantum mechanics
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Supersymmetry offers one of the deepest insights in the concept of solvability in quantum mechanics. This insight is, paradoxically, restricted by one of the most serious formal drawbacks of the standard Witten's formulation of supersymmetric quantum mechanics which lies in the Jevicki-Rodrigues' postulate of absence of poles in superpotentials W(x) over all the real axis of coordinates x. In our review we emphasize that this obstacle is artificial and that it disappears immediately after a suitable (say, constant) shift of the axis of x into complex plane. Detailed attention is paid to a close relationship between this common trick and the recent not quite expected increase of interest in non-Hermitian (a. k. a. PT-symmetric or pseudo-Hermitian) Hamiltonians. We show that the resulting PT-SUSY regularization recipe proves both easy and universal. An insight into its mathematics is mediated by the complex harmonic oscillator with a centrifugal-like spike. An exhaustive discussion of the role of the strength of this spike is offered. In addition we recollect the possibility of a re-formulation of the recipe in the second-order SUSY language. Finally we list a few promising directions of applicability of our PT-SUSY regularization prescription to a few more complicated nonrelativistic models (superintegrable Hamiltonians of the Smorodinsky-Winternitz and of the Calogero-Sutherland type) and to the relativistic Klein-Gordon equation (as well as to all of its unphysical higher-order analogues).
description: 17 pages, based on the talk during SUSY QM conference in Valladolid in the summer in 2003, to appear in J. Phys. A: Math. Gen. (spec. issue)
Effective Action and Phase Structure of Multi-Layer Sine-Gordon Type Models
Creators: name: Jentschura, U. D.
name: Nandori, I.
name: Zinn-Justin, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the effective action and the phase structure of N-layer sine-Gordon type models, generalizing the results obtained for the two-layer sine-Gordon model found in [I. Nandori, S. Nagy, K. Sailer and U. D. Jentschura, Nucl. Phys. B725, 467-492 (2005)]. Besides the obvious field theoretical interest, the layered sine-Gordon model has been used to describe the vortex properties of high transition temperature superconductors, and the extension of the previous analysis to a general N-layer model is necessary for a description of the critical behaviour of vortices in realistic multi-layer systems. The distinction of the Lagrangians in terms of mass eigenvalues is found to be the decisive parameter with respect to the phase structure of the N-layer models, with neighbouring layers being coupled by quadratic terms in the field variables. By a suitable rotation of the field variables, we identify the periodic modes (without explicit mass terms) in the N-layer structure, calculate the effective action and determine their Kosterlitz-Thouless type phase transitions to occur at a coupling parameter β^2_{c} = 8 N π, where N is the number of layers (or flavours in terms of the multi-flavour Schwinger model).
description: 15 pages
Magnetically Driven Accretion Flows in the Kerr Metric I: Models and Overall Structure
Creators: name: De Villiers, Jean-Pierre
name: Hawley, John F.
name: Krolik, Julian H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is the first in a series of papers that investigate the properties of accretion flows in the Kerr metric through three-dimensional, general relativistic magnetohydrodynamic simulations of tori with a near-Keplerian initial angular velocity profile. We study four models with increasing black hole spin, from a/M=0 to 0.998, for which the structural parameters of the initial tori are maintained nearly constant. The subsequent accretion flows arise self-consistently from stresses and turbulence created by the magnetorotational instability. We investigate the overall evolution and the late-time global structure in the resulting non-radiative accretion flows, including the magnetic fields within the disks, the properties of the flow in the plunging region, and the flux of conserved quantities into the black hole. Independent of black hole spin, the global structure is described in terms of five regions: the main disk body, the coronal envelope, the inner disk, consisting of an inner torus and plunging region, an evacuated axial funnel, and a bi-conical outflow confined to the corona-funnel boundary. We find evidence for lower accretion rates, stronger funnel-wall outflows, and increased stress in the near hole region with increasing black hole spin.
description: 29 pages, 15 figures, version of paper with high-resolution figures and links to animations available at http://www.astro.virginia.edu/~jd5v/KD_movies.htm
Energy level structure and transition data of Er$^{2+}$
Creators: name: Gaigalas, Gediminas
name: Rynkun, Pavel
name: Radžiūtė, Laima
name: Kato, Daiji
name: Tanaka, Masaomi
name: Jönsson, Per
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The main aim of this paper is to present accurate energy levels of the ground [Xe]$4f^{12}$ and first excited [Xe]$4f^{11}5d$ configurations of Er$^{2+}$. The energy level structure of the Er$^{2+}$ ion was computed using the multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction (RCI) methods, as implemented in the GRASP2018 program package. The Breit interaction, self-energy and vacuum polarization corrections were included in the RCI computations. The zero-first-order approach was used in the computations. Energy levels with the identification in $LS$ coupling for all (399) states belonging to the [Xe]$4f^{12}$ and [Xe]$4f^{11}5d$ configurations are presented. Electric dipole (E1) transition data between the levels of these two configurations are computed. The accuracy of the these data are evaluated by studying the behaviour of the transition rates as functions of the gauge parameter as well as by evaluating the cancellation factors. The core electron correlations were studied using different strategies. Root-mean-square deviations obtained in this study for states of the ground and excited configurations from the available experimental or semi-empirical data are 649 cm$^{-1}$, and 747 cm$^{-1}$, respectively.
description: 20 pages, 9 tables, 17 figures
Deformation of dark solitons in inhomogeneous Bose-Einstein condensates
Creators: name: Parker, N. G.
name: Proukakis, N. P.
name: Leadbeater, M.
name: Adams, C. S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: A dark soliton becomes unstable when it is incident on a background density gradient, and the induced instability results in the emission of sound. Detailed quantitative studies of sound emission are performed for various potentials, such as steps, linear ramps and gaussian traps. The amount of sound emission is found to be a significant fraction of the soliton energy for typical potentials. Continuous emission of sound is found to lead to an apparent deformation of the soliton profile. The power emitted by the soliton is shown to be parametrised by the square of the displacement of the centre of mass of the soliton from its density minimum, thus highlighting the significance of the inhomogeneity-induced soliton deformation.
description: 22 pages, 11 figures, J. Phys. B accepted
CIVL 498C Life Cycle Analysis of UBC Buildings
Creators: name: Sianchuk, Rob
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.”
ADVERSITIES IN REACHING THE AIMS OF LOCAL MARKETING. CASE STUDIES
PRZECIWNOŚCI LOSU A CELE MARKETINGOWE JEDNOSTEK TERYTORIALNYCH. STUDIA PRZYPADKU
Creators: name: Kamosinski, Slawomir
name: Kamosinski, Slawomir
Publisher: name: Unknown
Year: 2012
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Risk and Uncertainty
subject: territorial marketing
subject: product of a site (local product)
subject: site promotion
subject: unforeseeable event
subject: local government

description: The discussion stresses that the constant need for success felt by the local governments forces them to reach for the territorial marketing tools in seemingly uncharacteristic situations, resulting from the unforeseeable events. For instance, the promotion of the territorial entities uses such events as natural disasters, including ϐloods or epidemics. Occasionally, a sufϐicient event to site promotion is a protest of the local community against the human’s interference in the landscape or a broadly understood natural environment. The smallest administrative entities could even turn the information included in the media broadcast that ridicule or discourage a place from visiting it, into a local product. The abovementioned examples should not encourage the local authorities to undertake promotion. However, as it turns out in practice, promotion in such cases is very effective. Local authorities often treat it as the only method of prompt liquidation of the unforeseeable event consequences and the economic stimulation of local markets.
Ghost-Free de Sitter Supergravities as Consistent Reductions of String and M-theory
Creators: name: Cvetic, M.
name: Gibbons, G. W.
name: Pope, C. N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study properties of supergravity theories with non-compact gaugings, and their higher-dimensional interpretations via consistent reductions on the inhomogeneous non-compact hyperboloidal spaces {\cal H}^{p,q}. The gauged supergravities are free of ghosts, despite the non-compactness of the gauge groups. We give a general discussion of the existence of stationary points in the scalar potentials of such supergravities. These are of interest since they can be associated with de Sitter vacuum configurations. We give explicit results for consistent reductions on {\cal H}^{p,q} in various examples, derived from analytic continuation of previously-known consistent sphere reductions. In addition we also consider black hole and cosmological solutions, for specific examples of non-compact gaugings in D=4,5,7.
description: Latex, 35 pages
HEALTH PROMOTION AND THE COOPERATION OF PROVINCIAL GOVERNMENTS WITH NON-GOVERNMENT ORGANIZATIONS
PROMOCJA ZDROWIA W ASPEKCIE WSPÓŁPRACY SAMORZĄDÓW WOJEWÓDZKICH Z ORGANIZACJAMI POZARZĄDOWYMI
Creators: name: Holecki, Tomasz
name: Kaczmarek, Krzysztof
name: Wozniak-Holecka, Joanna
name: Syrkiewicz-Switala, Magdalena
name: Holecki, Tomasz
name: Kaczmarek, Krzysztof
name: Wozniak-Holecka, Joanna
name: Syrkiewicz-Switala, Magdalena
Publisher: name: Unknown
Year: 2012
Subjects: subject: Health Economics and Policy
subject: Industrial Organization
subject: Health promotion
subject: local government
subject: provincial government
subject: non-profit organization (NGO)

description: Local governments play an increasingly important role in the implementation of public tasks. This is a result of consistent national policy, which leads to a gradual takeover, by the subordinated units, of obligations previously carried out by the state. The demonstration of this tendency is reϐlected, among others, in the decreasing government involvement in the ϐinancing public tasks, such as welfare assistance and health care. Since the early 90’s, a sharp increase in the number of non-government organizations is observed, including those focused on health improvement of local communities. The purpose of this article is to present the research material about the practice of provincial government actions from the perspective of health promotion initiatives. The analysis covered all provinces during the five consecutive years, between 2005-2010. The research project verified the territorial differentiation in the context of pursued responsibility for the health care among particular provinces in the country, with a special emphasis on the participation of non-proϐit organizations in health promotion in terms of their cooperation with local governments. The research material was subjected to a context analysis and was preceded by a careful study of both domestic and foreign literature in the area of health promotion, relevant health indicators and social sciences, with a particular emphasis on the responsibilities of local governments for the health sector and public health issues. The research tool was a survey instrument developed by the authors and directed to all twelve provincial governments in Poland. The study examined the connections of local governments and nonprofit organizations cooperation in the area of health promotion, focusing on the currently implemented health programs, organizational, personnel, content-related and financial support of these investments.
title: Microbial Weathering of Volcanic Rocks
Creators: name: Simpson, Annika Emilia
Publisher: name: The Open University
Year: 2013

description: The aim of this thesis was to further the knowledge on microbial weathering, by looking at the effect of model organisms (Acidithiobacillus ferrooxidans and Geobacter metallireducens) to natural microbial communities (from basaltic glass).

It was found that the medium water-rock ratio (50:1) provided the optimum conditions for A. ferrooxidans growth, whilst the low water-rock ratio (1:1) had a lower release of iron because of pH. The pH affected the release of iron and REEs, with less released the higher the pH. In addition, it was found that, though localised areas of hematite were found on the treated rocks, there were also oxidised layers that did not correspond to specific mineralogy. The lack of specific mineral signatures on the rock surface, but the apparent oxidation of the surface, suggested that the surface had been passivated with Fe3+ binding to the mineral surface. In contrast, G. metallireducens did not affect the production of Fe2+ from basalt glass when compared to controls. However, when low water-rock ratios and hematite were tested, a difference was observed between abiotic and biotic flasks. It was suggested the low water-rock ratio possibly allowed G. metallireducens to obtain the iron more easily by affecting the pH of the solution which in turn affected the stability of the bound iron.

In terms of studying microbial communities on rocks, it was found that community structure in Icelandic basaltic glass changed over time, becoming more diverse, with a switch from r- to K-selected microorganisms over the course of the year, similarly to results obtained in the field. DGGE results showed each flask had a distinctive population - with no correlation between ratios, and replicates different in composition to each other. It is suggested that, though community does change over time (as shown by the clone libraries), the ratios do not have an effect and each flask is developing with its own ‘microbial island’. However, the results of the chemistry of the flask solutions indicated that the biological experiments showed differences in pH and elemental release between ratios. Elemental release rates were faster in the biological experiments. The natural communities affected mineral dissolution, possibly through the release of organic acids, which would also account for the drop in pHs observed in the biological experiments.

It was noted that there were differences in dissolution rates between the results reported in this thesis and previous literature. It is suggested that these are caused by the rock surface area as in previous studies the rocks have typically been crushed into powder and fine particles. This crushed powder would have provided fresh rock surface for the microorganisms and also greater surface area for reactions to take place, accounting for generally higher weathering rates in previous literature per unit weight of material.
Vibilia stebbingi Behning and Woltereck 1912
Creators: name: SHIH, CHANG-TAI
name: HENDRYCKS, ED A.
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Vibiliidae
Vibilia
Vibilia stebbingi

description: Vibilia stebbingi Behning and Woltereck, 1912
(figures 8, 9)
 Vibilia stebbingi Behning and Woltereck, 1912: 5–6, figures 1–3.
description: Published as part of SHIH, CHANG-TAI & HENDRYCKS, ED A., 2003, A new species and new records of the genus Vibilia Milne Edwards, 1830 (Amphipoda: Hyperiidea: Vibiliidae) occurring in the eastern Pacific Ocean, pp. 253-296 in Journal of Natural History 37 (3) on page 278, DOI: 10.1080/713834685, http://zenodo.org/record/4653315
Algorithms for Hiring and Outsourcing in the Online Labor Market
Creators: name: Anagnostopoulos, Aris
name: Castillo, Carlos
name: Fazzone, Adriano
name: Leonardi, Stefano
name: Terzi, Evimaria
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Although freelancing work has grown substantially in recent years, in part facilitated by a number of online labor marketplaces, (e.g., Guru, Freelancer, Amazon Mechanical Turk), traditional forms of "in-sourcing" work continue being the dominant form of employment. This means that, at least for the time being, freelancing and salaried employment will continue to co-exist. In this paper, we provide algorithms for outsourcing and hiring workers in a general setting, where workers form a team and contribute different skills to perform a task. We call this model team formation with outsourcing. In our model, tasks arrive in an online fashion: neither the number nor the composition of the tasks is known a-priori. At any point in time, there is a team of hired workers who receive a fixed salary independently of the work they perform. This team is dynamic: new members can be hired and existing members can be fired, at some cost. Additionally, some parts of the arriving tasks can be outsourced and thus completed by non-team members, at a premium. Our contribution is an efficient online cost-minimizing algorithm for hiring and firing team members and outsourcing tasks. We present theoretical bounds obtained using a primal-dual scheme proving that our algorithms have a logarithmic competitive approximation ratio. We complement these results with experiments using semi-synthetic datasets based on actual task requirements and worker skills from three large online labor marketplaces.
description: Published at 24th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining 2018
The Motion of a Point Vortex in Multiply Connected Polygonal Domains
Creators: name: Kalmoun, El Mostafa
name: Nasser, Mohamed M S
name: Hazaa, Khalifa A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the motion of a single point vortex in simply and multiply connected polygonal domains. In case of multiply connected domains, the polygonal obstacles can be viewed as the cross-sections of 3D polygonal cylinders. First, we utilize conformal mappings to transfer the polygonal domains onto circular domains. Then, we employ the Schottky-Klein prime function to compute the Hamiltonian governing the point vortex motion in circular domains. We compare between the topological structures of the contour lines of the Hamiltonian in symmetric and asymmetric domains. Special attention is paid to the interaction of point vortex trajectories with the polygonal obstacles. In this context, we discuss the effect of symmetry breaking, and obstacle location and shape on the behavior of vortex motion.
Ion transport across solid-state ion channels perturbed by directed strain
Creators: name: Smolyanitsky, A.
name: Fang, A.
name: Kazakov, A. F.
name: Paulechka, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We combine quantum-chemical calculations and molecular dynamics simulations to consider aqueous ion flow across non-axisymmetric nanopores in monolayer graphene and MoS$_2$. When the pore-containing membrane is subject to uniaxial tensile strains applied in various directions, the corresponding permeability exhibits considerable directional dependence. This anisotropy is shown to arise from directed perturbations of the local electrostatics by the corresponding pore deformation, as enabled by the pore edge geometries and atomic compositions. By considering nanopores with ionic permeability that depends on the strain direction, we present model systems that may yield a detailed understanding of the structure-function relationship in solid-state and biological ion channels. Specifically, the observed anisotropic effects potentially enable the use of permeation measurements across strained membranes to obtain directional profiles of ion-pore energetics as contributed by groups of atoms or even individual atoms at the pore edge. The resulting insight may facilitate the development of subnanoscale pores with novel functionalities arising from locally asymmetric pore edge features.
Optical transitions in quantum ring complexes
Creators: name: Kuroda, T.
name: Mano, T.
name: Ochiai, T.
name: Sanguinetti, S.
name: Sakoda, K.
name: Kido, G.
name: Koguchi, N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Making use of a droplet-epitaxial technique, we realize nanometer-sized quantum ring complexes, consisting of a well-defined inner ring and an outer ring. Electronic structure inherent in the unique quantum system is analyzed using a micro-photoluminescence technique. One advantage of our growth method is that it presents the possibility of varying the ring geometry. Two samples are prepared and studied: a single-wall ring and a concentric double-ring. For both samples, highly efficient photoluminescence emitted from a single quantum structure is detected. The spectra show discrete resonance lines, which reflect the quantized nature of the ring-type electronic states. In the concentric double--ring, the carrier confinement in the inner ring and that in the outer ring are identified distinctly as split lines. The observed spectra are interpreted on the basis of single electron effective mass calculations.
description: 8 pages, 7 figures, to appear in Phys. Rev. B
The Need for Further Reforms in Uganda’s Public Sector Pension System
Creators: name: Munyambonera, Ezra
name: Munu, Martin Luther
name: Munyambonera, Ezra
name: Munu, Martin Luther
Publisher: name: Unknown
Year: 2017
Subjects: subject: Labor and Human Capital
subject: Risk and Uncertainty
subject: Pension system
subject: Social security

description: The need to implement further reforms in Uganda’s Public Sector Pension (PSP)scheme, a consolidation of the different schemes is paramount. This arises from the increasing numbers of public servants being employed especially in the ever expanding districts and parliament. This would address the current and future challenge of old age social security risk. The policy brief provides an assessment of the structure, design and the trends in public spending on public pensions; and draws implications for its sustainability and affordability. The study uses public expenditure data on pension payments from the Ministry of Finance, Planning and Economic Development (MFPED), document reviews and some key stakeholder analysis. Results show that the cumulative fiscal burden of public spending on public pensions has been increasing over the years and has reached a higher level to be afforded by government without necessarily crowding out other competing public investments such as infrastructure development. We suggest that the current PSP scheme requires further reforms to gradually convert it from non-contributory to contributory between government and workers, in order to ensure sustainability. This is a good practice recommended by the World Bank for most of the Overseas Economic Cooperation and Development (OECD) countries including those in Africa. Experience from East Africa in Kenya and Tanzania that have implemented second generation pension reforms; show that converting the PSP scheme from non-contributory to contributory scheme eases fiscal burden on national budget and improves efficiency in the management and administration of the scheme.
Observables in 3-dimensional quantum gravity and topological invariants
Creators: name: Garcia-Islas, J. Manuel
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we report some results on the expectation values of a set of observables introduced for 3-dimensional Riemannian quantum gravity with positive cosmological constant, that is, observables in the Turaev-Viro model. Instead of giving a formal description of the observables, we just formulate the paper by examples. This means that we just show how an idea works with particular cases and give a way to compute 'expectation values' in general by a topological procedure.
description: 24 pages, 47 figures
Antiperiodic solitons of the Goldstone model on S^1
Creators: name: Doudoulakis, C. G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Our purpose is to present all static solutions of the Goldstone model on a circle in 1+1 dimensions with an antiperiodicity condition imposed on the scalar fields. Jacobi elliptic and standard trigonometric functions are used to express the solutions found and stability analysis of the latter is what follows. Classically stable quasi-topological solitons are identified.
description: 12 pages, 3 figures, 3 references added, some corrections made. Accepted for publication in Nonlinearity
Local Molecular Gas toward the Aquila Rift Region
Creators: name: Su, Yang
name: Yang, Ji
name: Yan, Qing-zeng
name: Gong, Yan
name: Chen, Zhiwei
name: Zhang, Shaobo
name: Sun, Yan
name: Zhang, Miaomiao
name: Chen, Xuepeng
name: Zhou, Xin
name: Wang, Min
name: Wang, Hongchi
name: Xu, Ye
name: Jiang, Zhibo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of a ~250 square degrees CO mapping (+26d4.1x10^5 Msun in the whole region. In fact, the mass of the molecular gas is dominated by the W40 giant molecular cloud (GMC) at ~474 pc (~1.4x10^5 Msun) and the GMC complex G036.0+01.0 at ~560-670 pc (~2.0x10^5 Msun), while the MCs at ~220-260pc have gas masses of 10^2-10^3 Msun. Interestingly, an ~80pc long filamentary MC G044.0-02.5 at a distance of ~404 pc shows a systematic velocity gradient along and perpendicular to the major axis of the filament. The HI gas with the enhanced emission has the similar spatial morphologies and velocity features compared to the corresponding CO structure, indicating that the large-scale converging HI flows are probably responsible for the formation of the MC. Meanwhile, the long filamentary MC consists of many sub-filaments with the lengths ranging from ~0.5 pc to several pc, as well as prevalent networks of filaments in other large-scale local MCs.
description: 25 figures, 1 table, typos corrected
From Finite to Infinite Range Order via Annealing: The Causal Architecture of Deformation Faulting in Annealed Close-Packed Crystals
Creators: name: Varn, D. P.
name: Crutchfield, J. P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze solid-state phase transformations that occur in zinc-sulfide crystals during annealing using a random deformation-faulting mechanism with a very simple interaction between adjacent close-packed double layers. We show that, through annealing, infinite-range structures emerge from initially short-range crystal order. That is, widely separated layers carry structurally significant information and so layer stacking cannot be completely described by any finite-range Markov process. We compare our results to two experimental diffraction spectra, finding excellent agreement.
description: 7 pages, 6 figures; See http://www.santafe.edu/projects/CompMech/papers/iro.html
Quasi-Local Evolution of the Cosmic Gravitational Clustering in Halo Model
Creators: name: Feng, Long-Long
name: Fang, Li-Zhi
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that the nonlinear evolution of the cosmic gravitational clustering is approximately spatial local in the $x$-$k$ (position-scale) phase space if the initial perturbations are Gaussian. That is, if viewing the mass field with modes in the phase space, the nonlinear evolution will cause strong coupling among modes with different scale $k$, but at the same spatial area $x$, while the modes at different area $x$ remain uncorrelated, or very weakly correlated. We first study the quasi-local clustering behavior with the halo model, and demonstrate that the quasi-local evolution in the phase space is essentially due to the self-similar and hierarchical features of the cosmic gravitational clustering. The scaling of mass density profile of halos insures that the coupling between $(x-k)$ modes at different physical positions is substantially suppressed. Using high resolution N-body simulation samples in the LCDM model, we justify the quasi-locality with the correlation function between the DWT (discrete wavelet transform) variables of the cosmic mass field. Although the mass field underwent a highly non-linear evolution, and the DWT variables display significantly non-Gaussian features, there are almost no correlations among the DWT variables at different spatial positions. Possible applications of the quasi-locality have been discussed.
description: AAS Latex file, 33 pages, 7 figures included, accepted for publication in ApJ
Galactic Bulges from HST NICMOS Observations: central galaxian objects, and nuclear profile slopes
Creators: name: Balcells, M.
name: Graham, A. W.
name: Peletier, R. F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the central structural properties for a sample of S0-Sbc galaxies down to scales of ~10 pc using HST NICMOS images. We find that the photometric masses of the central star clusters, which occur in 58% of our sample, are related to their host bulge masses such that MassPt = 10^{7.75\pm0.15}(MassBul/10^{10}MassSun)^{0.76\pm 0.13}. Put together with recent data on bulges hosting supermassive black holes, we infer a non-linear dependency of the `Central Massive Object' mass on the host bulge mass such that MassCMO = 10^{7.51\pm 0.06} (MassBul/10^{10}MassSun)^{0.84 \pm 0.06}. We argue that the linear relation presented by Ferrarese et al. is biased at the low-mass end by the inclusion of the disc light from lenticular galaxies in their sample. Matching our NICMOS data with wider-field, ground-based K-band images enabled us to sample from the nucleus to the disk-dominated region of each galaxy, and thus to perform a proper bulge-disk decomposition. We found that the majority of our galaxies (~90%) possess central light excesses which can be modeled with an inner exponential and/or an unresolved point source in the case of the nuclear star clusters. All the extended nuclear components, with sizes of a few hundred pc, have disky isophotes, which suggest that they may be inner disks, rings, or bars; their colors are redder than those of the underlying bulge, arguing against a recent origin for their stellar populations. Surface brightness profiles rise inward to the resolution limit of the data, with a continuous distribution of logarithmic slopes from the low values typical of dwarf ellipticals (0.1 \leq gamma \leq 0.3) to the high values (gamma ~ 1) typical of intermediate luminosity ellipticals; the nuclear slope bi-modality reported by others is not present in our sample.
description: Accepted by ApJ. Uses Apr 12, 2004 emulateapj.cls (included)
Looming Long-term Economic Effect of Climate Change on Uganda’s Coffee Industry
Creators: name: Mbowa, Swaibu
name: Nakazi, Florence
name: Nkandu, Joseph
name: Mbowa, Swaibu
name: Nakazi, Florence
name: Nkandu, Joseph
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: Risk and Uncertainty
subject: Coffee production
subject: Seedlings
subject: Climate change

description: Predictions demonstrate that climate change is likely to stifle the coffee development program in Uganda at three levels: (i) by reducing survival rate of coffee seedlings to expand coffee acreage; (ii) exacerbate productivity challenges in an inherently constrained rain-fed low input coffee production system; and (iii) contributing to reduction in quality of coffee beans (specifically bean size) produced leading to losses in absolute value in export earnings. This is likely to slow down the low middle-income status by 2020 target of exporting 20 million (60 Kg bags) annually. The farmers’ ownership model piloted by the National Union of Coffee Agribusinesses and Farm Enterprises (NUCAFE), where a smallholder farmer is guaranteed premium prices for value addition, offers a strategy to sustainably invest in climate smart agriculture 1 (involving use of irrigation and fertilizer)1in coffee production.
Life Cycle Analysis of Fairview Crescent Student Housing - UBC Campus Vancouver
Creators: name: Richardsen, Ross
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.”
Topology Optimization with Accessibility Constraint for Multi-Axis Machining
Creators: name: Mirzendehdel, Amir M.
name: Behandish, Morad
name: Nelaturi, Saigopal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: In this paper, we present a topology optimization (TO) framework to enable automated design of mechanical components while ensuring the result can be manufactured using multi-axis machining. Although TO improves the part's performance, the as-designed model is often geometrically too complex to be machined and the as-manufactured model can significantly vary due to machining constraints that are not accounted for during TO. In other words, many of the optimized design features cannot be accessed by a machine tool without colliding with the part (or fixtures). The subsequent post-processing to make the part machinable with the given setup requires trial-and-error without guarantees on preserving the optimized performance. Our proposed approach is based on the well-established accessibility analysis formulation using convolutions in configuration space that is extensively used in spatial planning and robotics. We define an 'inaccessibility measure field' (IMF) over the design domain to identify non-manufacturable features and quantify their contribution to non-manufacturability. The IMF is used to penalize the sensitivity field of performance objectives and constraints to prevent formation of inaccessible regions. Unlike existing discrete formulations, our IMF provides a continuous spatial field that is desirable for TO convergence. Our approach applies to arbitrary geometric complexity of the part, tools, and fixtures, and is highly parallelizable on multi-core architecture. We demonstrate the effectiveness of our framework on benchmark and realistic examples in 2D and 3D. We also show that it is possible to directly construct manufacturing plans for the optimized designs based on the accessibility information.