cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Regulation of transcription factors by integrin-linked kinase during oncogenesis
Creators: name: Tan, Clara Chia-Hua
Publisher: name: University of British Columbia
Year: 2009

description: Integrin-linked kinase is a serine-threonine kinase that was identified by a yeast two-hybrid screen for proteins that interact with the cytoplasmic tail of Pi-integrin. Overexpression of ILK in epithelial cells promotes cell proliferation, anchorageindependent growth, epithelial to mesenchymal transformation, inhibition of anoikis, increased invasiveness and tumourgencity in nude mice. This thesis aims to identify downstream effectors of ILK, and to elucidate the pathway by which ILK regulates the activity of transcription factors. In the first part of the study, I demonstrate that ILK inhibits the activity of glycogen synthase kinase-3 (GSK-3) and that ILK can promote the phosphorylation of GSK-3 either directly or indirectly through ILK-dependent activation of Protein kinase B (PKB/Akt). Furthermore, ILK activity is stimulated upon cell adhesion to fibronectin (FN), leading to inhibition of GSK-3 activity. This in turn prevents GSK-3 from phosphorylating the DNA binding site of c-Jun, resulting in the positive regulation of the AP-1 transcriptional activity. It was previously shown that over-expression of I LK results in increased stability of P-catenin and as well as translocation of P-catenin to the nucleus. Since GSK-3 can phosphorylate P-catenin and promote its degradation, the role of ILK-mediated inhibition of GSK-3 and P-catenin stability was investigated. In the second part of this thesis, I studied the effect of inhibiting ILK activity in the human colon carcinoma cell lines, SW-480 and DLD-1, which lack functional APC. I found that ILK is able to regulate p-catenin pools, and modulate P-catenin/TCF/LEF transcription activity in an APC independent manner. It was previously observed that ILK overexpression caused a concomitant decrease in the expression of E-cadherin. This was proposed to account for the morphological changes seen upon ILK expression. The expression of E-cadherin is regulated by E-boxes in the E-cadherin promoter, which serve as regions of repressor binding. Therefore, binding of transcriptional repressor factors to the E-boxes results in repression of transcription and expression of E-cadherin. The transcriptional repressors that bind to E-boxes are members of the Snail family. This study shows that ILK upregulates the expression of the Snail transcriptional repressor, which in turn suppresses the expression of E-cadherin. Transfection with dominant negative ILK or exposure to the small molecule ILK inhibitor was able to reverse the effects of ILK. Together, these data demonstrate that ILK is involved in regulating the activity of transcription factors p-catenin/TCF/LEF, and AP-1. ILK regulates the activity of AP-1 and P-catenin-TCF/LEF through the inactivation of GSK-3 and the regulation of Pcatenin pools.
Estimating Photometric Redshifts Using Support Vector Machines
Creators: name: Wadadekar, Yogesh
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new approach to obtaining photometric redshifts using a kernel learning technique called Support Vector Machines (SVMs). Unlike traditional spectral energy distribution fitting, this technique requires a large and representative training set. When one is available, however, it is likely to produce results that are comparable to the best obtained using template fitting and artificial neural networks. Additional photometric parameters such as morphology, size and surface brightness can be easily incorporated. The technique is demonstrated using samples of galaxies from the Sloan Digital Sky Survey Data Release 2 and the hybrid galaxy formation code GalICS. The RMS error in redshift estimation is $<0.03$ for both samples. The strengths and limitations of the technique are assessed.
description: 10 pages, 3 figures, to appear in the PASP, minor typos fixed to make consistent with published version
Galaxy Merger Rates up to z $\sim$ 3 using a Bayesian Deep Learning Model $-$ A Major-Merger classifier using IllustrisTNG Simulation data
Creators: name: Ferreira, Leonardo
name: Conselice, Christopher J.
name: Duncan, Kenneth
name: Cheng, Ting-Yun
name: Griffiths, Alex
name: Whitney, Amy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Merging is potentially the dominate process in galaxy formation, yet there is still debate about its history over cosmic time. To address this we classify major mergers and measure galaxy merger rates up to z $\sim$ 3 in all five CANDELS fields (UDS, EGS, GOODS-S, GOODS-N, COSMOS) using deep learning convolutional neural networks (CNNs) trained with simulated galaxies from the IllustrisTNG cosmological simulation. The deep learning architecture used is objectively selected by a Bayesian Optmization process over the range of possible hyperparameters. We show that our model can achieve 90% accuracy when classifying mergers from the simulation, and has the additional feature of separating mergers before the infall of stellar masses from post mergers. We compare our machine learning classifications on CANDELS galaxies and compare with visual merger classifications from Kartaltepe et al. (2015), and show that they are broadly consistent. We finish by demonstrating that our model is capable of measuring galaxy merger rates, $\mathcal{R}$, that are consistent with results found for CANDELS galaxies using close pairs statistics, with $\mathcal{R}(z) = 0.02 \pm 0.004 \times (1 +z) ^ {2.76 \pm 0.21}$. This is the first general agreement between major mergers measured using pairs and structure at z < 3.
description: 22 pages, 13 figures, 3 tables, accepted for publication in ApJ
TECHNOLOGY IN THE AGRICULTURAL ECONOMICS CLASSROOM: ARE WE ON THE RIGHT PATH?
Creators: name: Dahlgran, Roger A.
name: Dahlgran, Roger A.
Publisher: name: Unknown
Year: 2001
Subjects: Teaching/Communication/Extension/Profession

description: This paper surveys the extent and application of Internet-enhanced course instruction in agricultural economics. We find that roughly thirty percent of agricultural economics courses have websites and that the purpose of these websites is to distribute course documents. We argue that this application substitutes readily for traditional teaching methods. According to production economics principles, introduction of an input that substitutes readily for an existing input will not increase production. Therefore, we would not expect course websites used in this manner to greatly enhance learning. We briefly discuss Internet-based tools that offer greater potential benefits than simple document distribution.
Partially Quenched Chiral Perturbation Theory to NNLO
Creators: name: Lahde, Timo A.
name: Bijnens, Johan
name: Danielsson, Niclas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: This paper summarizes the recent calculations of the masses and decay constants of the pseudoscalar mesons at the two-loop level, or NNLO, in Partially Quenched Chiral Perturbation Theory (PQxPT). Possible applications include chiral extrapolations of Lattice QCD, as well as the determination of the low-energy constants (LEC:s) of QCD.
description: To appear in the proceedings of PANIC 2005
MICROECONOMIC EVALUATION OF FARM RISK MANAGEMENT DECISIONS IN KENTUCKY
Creators: name: Kanakasabai, Murali
name: Dillon, Carl R.
name: Skees, Jerry R.
name: Kanakasabai, Murali
name: Dillon, Carl R.
name: Skees, Jerry R.
Publisher: name: Unknown
Year: 2001
Subjects: Risk and Uncertainty

description: The primary objective of this research is to integrate various avenues of risk management to provide a unified risk management strategy for the Kentucky producer. In addition the optimal insurance purchasing behavior and the impact of moral hazard on the optimal decisions of producers across risk levels is also studied. The study utilizes biophysical simulation modeling and quadratic programming to arrive at its results.
Noncommutative inspired wormholes admitting conformal motion involving minimal coupling
Creators: name: Zubair, M.
name: Waheed, Saira
name: Mustafa, G.
name: Rehman, Hamood Ur
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this manuscript, we explore the existence of wormhole solutions exhibiting spherical symmetry in a modified gravity namely $f(R,T)$ theory by involving some aspects of non-commutative geometry. For this purpose, we consider the anisotropic matter contents along with the well-known Gaussian and Lorentizian distributions of string theory. For the sake of simplicity in analytic discussions, we take a specific form of $f(R,T)$ function given by $f(R,T)=R+λT$. For both these non-commutative distributions, we get exact solutions in terms of exponential and hypergeometric functions. By taking some suitable choice of free parameters, we investigate different interesting aspects of these wormhole solutions graphically. We also explored the stability of these wormhole models using equilibrium condition. It can be concluded that the obtained solutions are stable and physically viable satisfying the wormhole existence criteria. Lastly, we discuss the constraints for positivity of the active gravitational mass for both these distributions.
description: 12 pages, 8 figures
Hierarchy of general invariants for bivariate LPDOs
Creators: name: Kartashova, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study invariants under gauge transformations of linear partial differential operators on two variables. Using results of BK-factorization, we construct hierarchy of general invariants for operators of an arbitrary order. Properties of general invariants are studied and some examples are presented. We also show that classical Laplace invariants correspond to some particular cases of general invariants.
description: to appear in J. "Theor.Math.Phys." in May 2006
DeltaGrad: Rapid retraining of machine learning models
Creators: name: Wu, Yinjun
name: Dobriban, Edgar
name: Davidson, Susan B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Machine learning models are not static and may need to be retrained on slightly changed datasets, for instance, with the addition or deletion of a set of data points. This has many applications, including privacy, robustness, bias reduction, and uncertainty quantifcation. However, it is expensive to retrain models from scratch. To address this problem, we propose the DeltaGrad algorithm for rapid retraining machine learning models based on information cached during the training phase. We provide both theoretical and empirical support for the effectiveness of DeltaGrad, and show that it compares favorably to the state of the art.
Electroweak Baryogenesis with dimension-6 Higgs interactions
Creators: name: Fromme, Lars
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the computation of the baryon asymmetry in the SM amplified by dimension-6 Higgs interactions using the WKB approximation. Analyzing the one-loop potential it turns out that the phase transition is strongly first order in a wide range of the parameters. It is ensured not to wash out the net baryon number gained previously even for Higgs masses up to at least 170 GeV. In addition dimension-6 operators induce new sources of CP violation. Novel source terms which enhance the generated baryon asymmetry emerge in the transport equations. This model predicts a baryon to entropy ratio close to the observed value for a large part of the parameter space.
description: 10 pages, 4 figures, Talk given at the 8th International Moscow School of Physics
Polynomial Solution of PT-/Non-PT-Symmetric and Non-Hermitian Generalized Woods-Saxon Potential via Nikiforov-Uvarov Method
Creators: name: Ikhdair, Sameer M.
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the Nikiforov-Uvarov method, the bound state energy eigenvalues and eigenfunctions of the PT-/non-PT-symmetric and non-Hermitian generalized Woods-Saxon (WS) potential with the real and complex-valued energy levels are obtained in terms of the Jacobi polynomials. According to the PT-symmetric quantum mechanics, we exactly solved the time-independent Schrodinger equation with same potential for the s-states and also for any l-state as well. It is shown that the results are in good agreement with the ones obtained before.
description: 20 pages
Improving the feasibility of stepped-wedge cluster randomised trials: a mixed methods enquiry
Creators: name: Kristunas, Caroline A.
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: Stepped-wedge cluster randomised trials are methodologically complex, and can be logistically challenging, due to the staggered implementation of the intervention. These trials may therefore be more likely than other trials, to encounter issues that make them unable to successfully meet their objectives. Consequently, feasibility studies might be particularly useful for stepped-wedge cluster randomised trials. However, it has not been known what specific aspects of this trial design affect its feasibility, nor to what extent the feasibility of these trials has been investigated. The overarching aim of this thesis, was to improve the feasibility of stepped-wedge cluster randomised trials, by: understanding how the feasibility of these trials has been investigated; identifying the aspects of this trial design that affect its feasibility; investigating a solution to an identified issue; and making recommendations to improve the feasibility of trials of this design. This was achieved through a mixed methods enquiry. Feasibility studies, designed to inform stepped-wedge cluster randomised trials, were identified. The objectives of these studies were examined and the quality of reporting of those that had been published was assessed. The objectives of these studies were rarely specific to the chosen study design. Aspects of the stepped-wedge cluster randomised trial design that could affect its feasibility, were identified from individuals with an involvement, or interest, in trials of this design, through an online questionnaire and interview study. The process for stepped-wedge cluster randomised trials, of balancing prognostic covariates during the randomisation, was identified as a cause for concern for those involved in trials of this design. The use of covariate constrained randomisation for stepped-wedge cluster randomised trials, was therefore investigated using a simulation study. Based on the findings of this thesis, recommendations were made to improve the feasibility of future stepped-wedge cluster randomised trials.
Hammerschmidt, Ernst: Äthiopistik an deutschen Universitäten
Creators: name: Assfalg, Julius
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 53 (1969): Oriens christianus, Band 53
Asymmetric versus symmetric $\rm{HgTe/Cd_{x}Hg_{1-x}Te}$ double quantum wells: Band gap tuning without electric field
Creators: name: Topalović, Dušan B.
name: Arsoski, Vladimir V.
name: Tadić, Milan Ž.
name: Peeters, François M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the electron states in double asymmetric $\rm{HgTe/Cd_{x}Hg_{1-x}Te}$ quantum wells grown along the $[001]$ direction. The subbands are computed by means of the envelope function approximation applied to the 8-band Kane $\bf{k}\cdot\bf{p}$ model. The asymmetry of the confining potential of the double quantum wells results in a gap opening which is absent in the symmetric system where it can only be induced by an applied electric field. The band gap and the subbands are affected by spin-orbit coupling which is a consequence of the asymmetry of the confining potential. The electron-like and hole-like states are mainly confined in different quantum wells, and the enhanced hybridization between them opens a spin-dependent hybridization gap at a finite in-plane wavevector. We show that both the ratio of the widths of the two quantum wells and the mole fraction of the $\rm{Cd_{x}Hg_{1-x}Te}$ barrier control both the energy gap between the hole-like states and the hybridization gap. The energy subbands are shown to exhibit inverted ordering, and therefore a nontrivial topological phase could emerge in the system.
description: 16 pages, 5 figures, The following article has been accepted by Journal of Applied Physics; After it is published, it will be found at https://doi.org/10.1063/5.0016069
Open Cow Replacement Decisions: an Application of Asset Replacement Theory
Creators: name: Ibendahl, Gregory A.
name: Anderson, John D.
name: Ibendahl, Gregory A.
name: Anderson, John D.
Publisher: name: Unknown
Year: 2001
Subjects: Livestock Production/Industries

description: Beef producers must decide what to do with a cow that fails to conceive during the breeding season. Keeping the open cow results in a years expenses without any revenue. Replacing the open cow with a bred heifer provides immediate revenue although it will take a few years before the heifer reaches peak productivity. A net present value framework is employed to examine this decision. The problem is unique because the open cow and the replacement heifer have different life spans. Finding a common timeframe is impossible since both alternatives will eventually employ replacement heifers if a long enough time frame is considered.
Characterization of viruses causing lysis of a toxic bloom-forming alga, Heterosigma akashiwo (Raphidophyseae)
Creators: name: Tai, Vera
Publisher: name: University of British Columbia
Year: 2009

description: Two viruses, HaRNAV and HaNIV, infecting the toxic bloom-forming alga Heterosigma akashiwo (Hada) Hada ex Hada et Chihara were characterized. HaRNAV is a 25 nm, single-stranded RNA virus with a genome size of approximately 9100 nucleotides. The virus particle has a lipid component as indicated by its sensitivity to chloroform and contains at least 5 structural proteins ranging in apparent size from 24 to 34 kDa. This is the first report of a single-stranded RNA virus infecting a phytoplankton. HaNIV is a 50 nm, double-stranded DNA virus with a 38.5 kb genome. HaNIV particles are also sensitive to chloroform and the capsid contains a major 38 kDa protein and a less abundant 20.5 kDa protein. HaRNAV and HaNIV caused lysis of a different range of strains, but both predominantly caused lysis of strains from the Northeast Pacific. Because different viruses infected different host strains, the complexity of virus-host interactions in the environment is demonstrated. Over 90 % of the HaNIV genome was sequenced and is represented as two contigs, 17 765 and 15 858 base pairs in length. Open reading frames identified from the sequences had similarities with terminase, lysozyme, recombination, and structural proteins of bacteriophages from the Myoviridae, Podoviridae, and Siphoviridae. The homology of HaNIV ORFs with proteins from diverse bacteriophages suggests that the evolution of HaNIV involved numerous horizontal gene transfer events. HaNIV was also shown to be latent. Latency may be an important survival strategy for phytoplankton viruses. Irrefutable evidence proving that the host of HaNIV particles is Heterosigma akashiwo and not a bacterium, however, is imperative before the ecological and evolutionary implications can be determined.
The Initial Mass Function in disc galaxies and in galaxy clusters: the chemo-photometric picture
Creators: name: Portinari, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The observed brightness of the Tully-Fisher relation suggests a low stellar M/L ratio and a "bottom-light" IMF in disc galaxies, but the corresponding efficiency of chemical enrichment tends to exceed the observational estimates. Either suitable tuning of the IMF slope and mass limits or metal outflows from disc galaxies must then be invoked. A standard Solar Neighbourhood IMF cannot explain the high metallicity of the hot intra-cluster medium: a different IMF must be at work in clusters of galaxies. Alternatively, if the IMF is universal and chemical enrichment is everywhere as efficient as observed in clusters, substantial loss of metals must occur from the Solar Neighbourhood and from disc galaxies in general; a "non-standard" scenario challenging our understanding of disc galaxy formation.
description: 6 pages, 4 figures; in Proceedings of IMF@50: the Initial Mass Function 50 years later; Corbelli, Palla and Zinnecker (eds.)
Entanglement production by independent quantum channels
Creators: name: Legeza, Örs
name: Gebhard, Florian
name: Rissler, Jörg
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: For the one-dimensional Hubbard model subject to periodic boundary conditions we construct a unitary transformation between basis states so that open boundary conditions apply for the transformed Hamiltonian. Despite the fact that the one-particle and two-particle interaction matrices link nearest and next-nearest neighbors only, the performance of the density-matrix renormalization group method for the transformed Hamiltonian does not improve. Some of the new interactions act as independent quantum channels which generate the same level of entanglement as periodic boundary conditions in the original formulation of the Hubbard model. We provide a detailed analysis of these channels and show that, apart from locality of the interactions, the performance of DMRG is effected significantly by the number and the strength of the quantum channels which entangle the DMRG blocks.
description: 10 pages, 17 figures
A Multi-Criteria Approach for Irrigation Water Management
Creators: name: Saraiva, Joao Paulo
name: Pinheiro, Antonio Cipriano
name: Saraiva, Joao Paulo
name: Pinheiro, Antonio Cipriano
Publisher: name: Unknown
Year: 2007
Subjects: subject: Water Framework Directive
subject: Flat Pricing
subject: Volumetric Pricing
subject: Multi- Objective Programming
subject: Water Management
subject: Portugal

description: The major implications that the European Union (EU) Water Framework Directive (WFD) may have in irrigated agriculture were analysed using alternative water policy measures. The consequences of policy change were evaluated in a case study (Baixo Alentejo, Portugal), using a Multi-Criteria Decision Making (MCDM) model that simulates farmers’ preferred behaviour. The study compares the effects of water pricing (volumetric and flat tariffs) and consumption quotas, in farmer’s income, water agency revenues, agricultural employment and water demand for irrigation. Model results indicate that the adjustments in farmer’s responses are dependent on the policy strategy enforced and on the policy level.
Chirality and Protein Folding
Creators: name: Kwiecinska, Joanna I.
name: Cieplak, Marek
Publisher: name: arXiv
Year: 2004
Subjects: subject: Biomolecules (q-bio.BM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: There are several simple criteria of folding to a native state in model proteins. One of them involves crossing of a threshold value of the RMSD distance away from the native state. Another checks whether all native contacts are established, i.e. whether the interacting amino acids come closer than some characteristic distance. We use Go-like models of proteins and show that such simple criteria may prompt one to declare folding even though fragments of the resulting conformations have a wrong sense of chirality. We propose that a better condition of folding should augment the simple criteria with the requirement that most of the local values of the chirality should be nearly native. The kinetic discrepancy between the simple and compound criteria can be substantially reduced in the Go-like models by providing the Hamiltonian with a term which favors native values of the local chirality. We study the effects of this term as a function of its amplitude and compare it to other models such as with the side groups and with the angle-dependent potentials.
description: To be published in a special issue of J. Phys.: Cond. Mat. (Bedlewo Workshop)
Community Members Make a More Comprehensive Record
Creators: name: Griscom, Richard
name: Harvey, Andrew
Publisher: name: Zenodo
Year: 2021
Subjects: Language documentation
Tanzania
Hadza
Gorwaa
Ihanzu
Asimjeeg Datooga

description: The literature on language documentation and description commonly underscores the
 importance of fostering close relationships with speech communities and promotes the notion
 that active community involvement “lead[s] to better overall documentation” (Arka 2018; c.f. de
 Lima Silva and Riestenberg 2020; Vallejos 2014). To date, however, no detailed analysis has
 been conducted of the differences between documentary materials collected by community
 members and those collected by community outsiders. This talk considers two criteria
 commonly applied to good overall language documentations, explores how they may be
 measured, and assesses the documentary materials collected with varying levels of involvement
 from four speaker communities of northern Tanzania over the last decade: the Asimjeeg
 Datooga (Griscom 2018), Gorwaa (Harvey 2017), Hadza (Griscom and Harvey 2020), and
 Ihanzu (Harvey 2019).
 First, we consider the criterion of comprehensiveness, that is the “collection of representative
 texts of all discourse types, all registers and genres, from speakers representing all ages,
 generations, socioeconomic classes, and so on” (Austin and Grenoble 2007, c.f. Himmelmann
 1998). Comprehensiveness of the documentary record can be measured through the analysis of
 speech-act and participant metadata, and we find unequivocal evidence that community
 member involvement contributes greatly to the diversity and quantity of documentary materials
 when compared to documentation created by a community outsider.
 Second, we consider the criterion of naturalness, or the degree to which “communicative events
 [are] unaffected by any external interference into the conventional communicative routines of
 the participants” (Himmelmann 1998, c.f. Foley 2003; de Léon 2009, and Klamer and Moro
 2020). Due to the “observer’s paradox” (Labov 1972), it is impossible to know the exact
 properties of unobserved language use, and each data collector will have a unique effect on the
 observed linguistic behavior, depending on their relationships with the other participants and
 their own mode of participation. For this reason, we propose that the criterion of naturalness be
 abandoned in the assessment of documentary materials, and that it be replaced by a broader
 view of comprehensiveness which stipulates that both those creating documentation and those
 being documented should be as diverse as possible.
 Across all of the four documentary projects surveyed in this study, we find empirical evidence
 that the level of active involvement of community members in collecting recordings contributes
 directly to the comprehensiveness of the documentary record, thereby also increasing its value
 for both the speaker community and academic community.
Exchange Rates and Commodity Markets: Global Exports of Corn, Cotton, Poultry, and Soybeans
Creators: name: Almarwani, Abdul
name: Jolly, Curtis M.
name: Thompson, Henry
name: Almarwani, Abdul
name: Jolly, Curtis M.
name: Thompson, Henry
Publisher: name: Unknown
Year: 2007
Subjects: subject: Exchange rates
subject: commodity exports
subject: market shares

description: The effects of exchange rates and risk on major commodity exporters are examined in markets constructed from the top five importers and top three exporters from 1961 to 2000. Depreciation typically stimulates exports but the impacts vary considerably. Exchange risk has virtually no negative impacts. Importer incomes raise exports for about half the exporters, and major competitor market shares affect about half the exporters.
Cosmological Evolution of a Purely Conical Codimension-2 Brane World
Creators: name: Papantonopoulos, Eleftherios
name: Papazoglou, Antonios
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the cosmological evolution of isotropic matter on an infinitely thin conical codimension-two brane-world. Our analysis is based on the boundary dynamics of a six-dimensional model in the presence of an induced gravity term on the brane and a Gauss-Bonnet term in the bulk. With the assumption that the bulk contains only a cosmological constant Lambda_B, we find that the isotropic evolution of the brane-universe imposes a tuned relation between the energy density and the brane equation of state. The evolution of the system has fixed points (attractors), which correspond to a final state of radiation for Lambda_B=0 and to de Sitter state for Lambda_B>0. Furthermore, considering anisotropic matter on the brane, the tuning of the parameters is lifted, and new regions of the parametric space are available for the cosmological evolution of the brane-universe. The analysis of the dynamics of the system shows that, the isotropic fixed points remain attractors of the system, and for values of Lambda_B which give acceptable cosmological evolution of the equation of state, the line of isotropic tuning is a very weak attractor. The initial conditions, in this case, need to be fine tuned to have an evolution with acceptably small anisotropy.
description: 20 pages, 4 figures, typo corrected
Subaru HDS Transmission Spectroscopy of the Transiting Extrasolar Planet HD 209458b
Creators: name: Narita, Norio
name: Suto, Yasushi
name: Winn, Joshua N.
name: Turner, Edwin L.
name: Aoki, Wako
name: Leigh, Christopher J.
name: Sato, Bun'ei
name: Tamura, Motohide
name: Yamada, Toru
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have searched for absorption in several common atomic species due to the atmosphere or exosphere of the transiting extrasolar planet HD 209458b, using high precision optical spectra obtained with the Subaru High Dispersion Spectrograph (HDS). Previously we reported an upper limit on H alpha absorption of 0.1% (3 sigma) within a 5.1Åband. Using the same procedure, we now report upper limits on absorption due to the optical transitions of Na D, Li, H alpha, H beta, H gamma, Fe, and Ca. The 3 sigma upper limit for each transition is approximately 1% within a 0.3Åband (the core of the line), and a few tenths of a per cent within a 2Åband (the full line width). The wide-band results are close to the expected limit due to photon-counting (Poisson) statistics, although in the narrow-band case we have encountered unexplained systematic errors at a few times the Poisson level. These results are consistent with all previously reported detections and upper limits, but are significantly more sensitive.
description: 10 pages, 9 figures
Numerical resolution of some BVP using Bernstein polynomials
Creators: name: Argentini, Gianluca
Publisher: name: arXiv
Year: 2005
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Software (cs.MS)
subject: Classical Analysis and ODEs (math.CA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: G.1.7

description: In this work we present a method, based on the use of Bernstein polynomials, for the numerical resolution of some boundary values problems. The computations have not need of particular approximations of derivatives, such as finite differences, or particular techniques, such as finite elements. Also, the method doesn't require the use of matrices, as in resolution of linear algebraic systems, nor the use of like-Newton algorithms, as in resolution of non linear sets of equations. An initial equation is resolved only once, then the method is based on iterated evaluations of appropriate polynomials.
description: 7 pages, 3 figures
Unveiling Mapping Structures of Spinor Duals
Creators: name: Cavalcanti, R. T.
name: da Silva, J. M. Hoff
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Following the program of investigation of alternative spinor duals potentially applicable to fermions beyond the standard model, we demonstrate explicitly the existence of several well-defined spinor duals. Going further we define a mapping structure among them and the conditions under which sets of such dual maps do form a group. We also study the covariance of bilinear quantities constructed with the several possible duals, the invariant eigenspaces of those group elements and its connections with spinors classification, as well as dual maps defined as elements of group algebras.
description: 11 pages, no figures
Removal of $^{210}$Pb by Etch of Crystalline Detector Sidewalls
Creators: name: Street, Joseph
name: Mahapatra, Rupak
name: Morrison, Eric
name: Platt, Mark
name: Schnee, Richard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A potential source of dominant backgrounds for many rare-event searches or screening detectors is from radon daughters, specifically $^{210}$Pb, deposited on detector surfaces, often during detector fabrication. Performing a late-stage etch is challenging because it may damage the detector. This paper describes a late-stage etching technique that reduces surface $^{210}$Pb and $^{210}$Po by $>99\times$ at 90% C.L.
description: 6 pages, 6 figures
Molitor, Joseph: Glossarium Latinum-Ibericum-Graecum in quattuor evangelia et actus apostolorum et in epistulas catholicas necnon in apocalypsim antiquioris versionis ibericae
Creators: name: Assfalg, Julius
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 53 (1969): Oriens christianus, Band 53
Export, Assembly-line FDI or FDI with the Possibility of Technology Diffusion: Optimal Entry Mode for Multinationals
Creators: name: Banerjee (Chatterjee), Tanmoyee
name: Mitra, Nilanjana
name: Banerjee (Chatterjee), Tanmoyee
name: Mitra, Nilanjana
Publisher: name: Unknown
Year: 2008
Subjects: subject: Export
subject: Assembly-line FDI
subject: FDI with Complete Production
subject: IPR Protection

description: The paper tries to evaluate the optimal entry mode of a Multinational Company that is choosing among export, fragmented production structure with assembly-line FDI in LDC or complete production in LDC with FDI. The results show that if the plant installation cost is sufficiently high then the firm will find it profitable to export the finished product to the LDC market and the Government will not exercise any IPR restriction. If plant installation cost is below a certain critical level the MNC chooses complete LDC production with FDI over assembly-line FDI if the IPR restriction is strong, where the model assumes that a fake producer can copy the product if complete production takes place in LDC. In such a situation government will choose to protect IPR if government earning exceeds the cost of IPR protection, otherwise no monitoring is the optimal strategy of the government and MNC will choose the strategy of fragmented production structure and assembly-line FDI will take place in LDC.
AHDriFT Construction Methods
Creators: name: Amber, Evan
name: Peterman, William
name: Lipps, Gregory
Publisher: name: figshare
Year: 2020
Subjects: subject: 60299 Ecology not elsewhere classified
subject: FOS: Biological sciences

description: Detailed step-by-step construction guide for a Y-shaped Adapted-Hunt Drift Fence Technique, modified from the original version described in Martin et al. Wildlife Society Bulletin, 2017.
Environmental Policy, Education and Growth: A Reappraisal when Lifetime Is Finite
Creators: name: Pautrel, Xavier
name: Pautrel, Xavier
Publisher: name: Unknown
Year: 2008
Subjects: subject: Growth
subject: Environment
subject: Overlapping Generations
subject: Human Capital

description: This article demonstrates that when finite lifetime is introduced in a Lucas (1988) growth model, the environmental policy may enhance growth both in the short- and the long-run, while pollution does not influence educational activities, labor supply is not elastic and human capital does not enter the utility function. This is because finite lifetime and the appearance of newborns at each date creates a turnover of generations which disconnects the aggregate consumption growth to the interest rate. We show that the shorter is the horizon, the greater the effect of the environmental policy on growth, because the higher the “generational turnover effect”. We also demonstrate that when time is not the single production factor in education, the environmental policy promotes growth only if time remains the predominant factor. Otherwise, the crowding-out effect of the tighter environmental policy dominates the “generational turnover effect” and growth diminishes. Finally, when the source of pollution is final output rather than physical capital and time is the single factor in education, the environmental does not affect growth in the steady-state, despite the “generational turnover effect”. Nevertheless, if the education good is introduced, the positive influence of the environmental policy appears again.
X-ray and Radio Monitoring of GX 339-4 and Cyg X-1
Creators: name: Nowak, Michael A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Previous work by Motch et al. (1985) suggested that in the low/hard state of GX339-4, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender (2002) later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX339-4. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX339-4. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in Cyg X-1 through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of `parallel tracks' in the radio/X-ray correlation which are associated with `failed transitions' to, or the beginning of a transition to, the soft state. We also find that for Cyg X-1 the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux.
description: To Appear in the Proceedings of "From X-ray Binaries to Quasars: Black Hole Accretion on All Mass Scales" (Amsterdam, July 2004). Eds. T Maccarone, R. Fender, L. Ho
Justifiability of Littering: An Empirical Investigation
Creators: name: Torgler, Benno
name: Garcia-Valinas, Maria A.
name: Macintyre, Alison
name: Torgler, Benno
name: Garcia-Valinas, Maria A.
name: Macintyre, Alison
Publisher: name: Unknown
Year: 2008
Subjects: subject: Littering
subject: Environmental Participation
subject: Environmental Preferences
subject: Environmental Outcomes

description: The paper investigates the relationship between environmental participation and littering. Previous empirical work in the area of littering is scarce as is evidence regarding the determinants of littering behavior. We address these deficiencies, demonstrating a strong empirical link between environmental participation and reduced public littering using European Values Survey (EVS) data for 30 Western and Eastern European countries. The results suggest that membership in environmental organizations strengthens commitment to anti-littering behaviour, thereby supporting improved environmental quality.
New standard magnetic field values determined by cancellations of ${}^{85}\text{Rb}$ and ${}^{87}\text{Rb}$ atomic vapors $5{}^2{S}_{1/2} \rightarrow 6{}^2{P}_{1/2,~3/2}$ transitions
Creators: name: Momier, Rodolphe
name: Aleksanyan, Artur
name: Gazazyan, Emil
name: Papoyan, Aram
name: Leroy, Claude
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In this article, we study the theoretical behaviour of all the possible hyperfine transitions ($π$, $σ^+$ and $σ^-$) between the $5S$ and $6P$ states of ${}^{87}\text{Rb}$ and ${}^{85}\text{Rb}$ atomic vapors under the influence of an external magnetic field $B$. We show that, for specific transitions, we obtain one or several $B$-values for which the transition intensity is cancelled. The precision of these values is limited to the uncertainty of the physical quantities that are involved in the problem, thus measuring precisely the $B$-values for the cancellations could be a way to determine these quantities more precisely. In the simplest cases involving $2\times 2$ hamiltonians, we give eigenvectors, eigenvalues and analytical formulas to determine the transition cancellation. By checking accuracy between formulas and numerical simulations, we conclude that it is possible to use the latter in order to determine all the cancellations even in the most complicated cases.
description: 27 pages, 15 figures
A Simple Equivalent Circuit Approach for Anisotropic Frequency Selective Surfaces and Metasurfaces
Creators: name: Borgese, Michele
name: Costa, Filippo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: An equivalent circuit model for Frequency Selective Surfaces (FSS) comprising anisotropic elements is presented. The periodic surface is initially simulated with an arbitrary azimuthal incidence angle and its surface impedance matrix is derived. The impedance matrix is subsequently rotated by an angle $φ^{rot}$ on the crystal axes $χ_1$, $χ_2$ thus nullifying its extra diagonal terms. The rotation angle $φ^{rot}$ is derived according to the spectral theorem by using the terms of the matrix initially extracted. The diagonal terms of the rotated matrix, that is, the impedances $Z_{χ_1}$ and $Z_{χ_2}$, are finally matched with simple LC networks. The circuit model representation of the anisotropic element can be used to analyse anisotropic FSSs rotated by a generic azimuth angle. The methodology provides a compact description of generic FSS elements with only five parameters: the lumped parameters of the LC network $L_{χ_1}$, $C_{χ_1}$, $L_{χ_2}$, $C_{χ_2}$ and the rotation angle $φ^{rot}$. The circuit model can take into account the presence of dielectric substrates close to the FSS or a variation of the FSS periodicity without additional computational efforts. The equivalent circuit model is finally applied to the design of two transmitting polarization converts based on anisotropic metasurfaces.
description: in IEEE Transactions on Antennas and Propagation
Commercialization of Agriculture Under Population Pressure: Effects on Production, Consumption, and Nutrition in Rwanda
Creators: name: Von Braun, Joachim
name: De Haen, Hartwig
name: Blanken, Juergen
name: Von Braun, Joachim
name: De Haen, Hartwig
name: Blanken, Juergen
Publisher: name: Unknown
Year: 1991
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: International Development
subject: Agriculture and State
subject: Rwanda
subject: Produce trade
subject: Government policy
subject: Exports
subject: Food supply
subject: Nutrition policy
subject: Population

description: Rapid population growth in agroecologies that are already under high population pressure poses a major challenge for development policy. It becomes an even greater challenge in complex agroecologies where little new technology for rapid agricultural expansion is available. The mountain zones of the Zaire-Nile Divide in Central Africa present an example of such a challenging environment where agriculture has encroached onto marginal zones, that is, water catchment areas and the last tropical forests of the area. This study by von Braun, de Haen, and Blanken highlights the potentials of agricultural development for the employment, income, and consumption of the poor, but also stresses that nonagricultural rural growth and employment expansion are key to improved food security and nutrition in this setting. The authors show that the delivery of public goods—health services, sanitation, and education—has to move ahead in order to maintain and improve the human capital foundation in this stressed environment. The study is based on detailed primary household data utilized in innovative ways to assess the household's and farmer's (and her husband's) behavior in the subsistence economy vis-a-vis options for specialization. A number of interesting policy findings emerge, such as the poor being too poor to capture the gains from efficient specialization because they need to take care of subsistence-based insurance against hunger. While generally favorable effects of commercialization of agriculture for nutrition are manifested by this study and preceding IFPRI studies on this topic, the present study also draws attention to the need for concern about land tenure when the stimulus for agricultural commercialization is given in a land-scarce environment.