cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 2 of The key components of a successful model of midwifery-led continuity of carer, without continuity at birth: findings from a qualitative implementation evaluation
Creators: name: Dharni, N.
name: H. Essex
name: M. J. Bryant
name: A. Cronin De Chavez
name: K. Willan
name: D. Farrar
name: T. Bywater
name: J. Dickerson
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Science Policy
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Additional file 2.
On the Consistency of MSGUT Spectra
Creators: name: Aulakh, Charanjit S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show explicitly that, once convention dependent phases are properly accounted for, the mass spectra evaluated by us in hep-ph\0204097 and hep-ph\0405074 satisfy the Trace, SU(5) reassembly and Goldstone counting consistency checks. Furthermore proper phase accounting shows that the transposition symmetry called "Hermiticity" will be manifest only up to signs arising from the product of six phase factors which must be reinserted if the symmetry is to be verified also as regards signs. Thus the claims of hep-ph/0405300 and hep-ph/0412348 concerning the inconsistency of our results are completely mistaken. The Chiral multiplet spectra of the two calculations are equivalent. However our method also gives all gauge and gauge chiral spectra as well as a MSSM decomposition of all SO(10) MSGUT couplings, for both tensors and spinors, which are unavailable, even in principle, using the methods of the above papers.
description: 9, pages 2 column, revtex4
The puzzle of the soft X-ray excess in AGN: absorption or reflection?
Creators: name: Chevallier, L.
name: Collin, S.
name: Dumont, A. -M.
name: Czerny, B.
name: Mouchet, M.
name: Goncalves, A. C.
name: Goosmann, R. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The 2-10 keV continuum of AGN is generally well represented by a single power law. However, at smaller energies the continuum displays an excess with respect to the extrapolation of this power law, called the ''soft X-ray excess''. Until now this soft X-ray excess was attributed, either to reflection of the hard X-ray source by the accretion disk, or to the presence of an additional comptonizing medium, giving a steep spectrum. An alternative solution proposed by Gierlinski and Done (2004) is that a single power law well represents both the soft and the hard X-ray emission and the impression of the soft X-ray excess is due to absorption of a primary power law by a relativistic wind. We examine the advantages and drawbacks of reflection versus absorption models, and we conclude that the observed spectra can be well modeled, either by absorption (for a strong excess), or by reflection (for a weak excess). However the physical conditions required by the absorption models do not seem very realistic: we would prefer an ''hybrid model''.
description: 4 pages, 3 figures, abstracts SF2A-2005, published by EDP-Sciences Conference Series
Multicomponent synthesis of 4-unsubstituted 5-nitropyridine derivatives
Creators: name: Kulakov, Ivan V.
name: Oleshchuk, Alena L.
name: Koveza, Vladislav A.
name: Palamarchuk, Irina V.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Multicomponent reaction of 2-nitroacetophenone, urotropine (or paraformaldehyde), β-dicarbonyl compound and ammonium acetate afforded five new 4-unsubstituted 5-nitro-6-phenyl-1,4-dihydropyridine derivatives, oxidation of which provided the corresponding 5-nitro-6-phenylpyridines. The proposed approach for the synthesis of 4-unsubstituted 5-nitro-6-phenyl-1,4-dihydropyridines and their subsequent aromatization into pyridines made it possible to reduce the total reaction time by more than 200 times and the overall yield of 5-nitro-6-phenylpyridine by 2 times compared with the known methods.
IMPERFECT COMPETITION MODELS AND COMMODITY PROMOTION EVALUATION: THE CASE OF U.S. GENERIC MILK ADVERTISING
Creators: name: Suzuki, Nobuhiro
name: Kaiser, Harry M.
name: Suzuki, Nobuhiro
name: Kaiser, Harry M.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Evaluation
subject: Generic milk advertising
subject: Imperfect competition model

description: This article examines whether the assumption of perfect competition in the U.S. dairy industry biases the findings of economic impacts of generic dairy advertising. An imperfect competition model based on an approach similar to that of Appelbaum is developed and used to evaluate generic milk advertising. The results are compared with a perfect competition model. The findings indicate positive price and quantity impacts due to generic advertising. The differences in magnitude of impacts between the two models are small, suggesting that the assumption of perfect competition for U.S. dairy models is plausible.
MINIMIZING FARM-TO-MILL COTTON CLEANING COST
Creators: name: Bennett, Blake K.
name: Misra, Sukant K.
name: Bennett, Blake K.
name: Misra, Sukant K.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Crop Production/Industries
subject: Cotton cleaning
subject: Least-cost configuration
subject: Yarn quality

description: This study focuses on least-cost farm-to-mill cotton cleaning configurations employing survey, regression, and simulation techniques. The resulting least-cost cotton cleaning configurations, employing standard textile technology, included the use of one lint cleaning in the ginning stage. The use of a field cleaner in the harvesting stage was also found to be optimal with some variation based on the desired yarn quality. Results of the study indicated that the optimal cleaning configurations were distinctly different from currently used practices, such that appropriate changes could save the cotton industry between $0.30 and $0.60 per bale of cotton, depending on the desired yarn quality.
Validation and comparison of different near-infrared quantitative methods to rapid determination of the total content of anthraquinones in Rhubarb based on accuracy profiles
Creators: name: Zhan, Shu-Yi
name: Sheng-Wang Liang
name: Wang, Shu-Mei
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified

description: Near-infrared spectroscopy, as a fast and nondestructive analytical tool, is becoming attractive for quality control of traditional Chinese medicine. In this study, the near-infrared quantitative methods for rapid determination of the total content of five anthraquinone ingredients were developed in two ways and validated and compared by the accuracy profile method based on the total error concept. Sixty-five Rhubarb samples were collected and characterized by near-infrared spectra. The first method was developed by establishing the quantitative model to quantify the total content of anthraquinones directly, while the second was developed by establishing different quantitative models to determine the content of each anthraquinone in rhubarb and to calculate the accumulation. External four rhubarb samples were collected and the validation data were obtained through a “4 × 3 × 3” factorial design. The trueness, precision, and accuracy of both methods were evaluated and compared by accuracy profiles. The results showed that the trueness, precision, and accuracy of the former near-infrared quantitative method were within the acceptable limits, and performed much better than the latter one. This indicated that the former method was more capable to accurately determine the total content of anthraquinones in rhubarb. Moreover, the accuracy profile provided a new path to evaluate and select a proper near-infrared quantitative method to quality control of traditional Chinese medicine.
MAIZE IN EASTERN AND SOUTHERN AFRICA: "SEEDS" OF SUCCESS IN RETROSPECT
Creators: name: Smale, Melinda
name: Jayne, Thomas S.
name: Smale, Melinda
name: Jayne, Thomas S.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: maize
subject: seed technical change
subject: Sub-Saharan Africa
subject: food policies

description: This synthesis revisits the "maize success story" in Sub-Saharan Africa, drawing selectively from an extensive published literature about maize seed technical change and related policies. The review focuses on the countries of Kenya, Zimbabwe, Zambia, and Malawi, where maize is most important in the food economy, and refers to the period when maize became a dominant food crop through the 1990s. The term "success" is equivocal in this case, both because of the difficult of establishing the appropriate counterfactual and because some of the policies that contributed to success in one period later led to decline. While the "seeds" themselves were the result of innovative, successful maize breeding, boom periods in maize production were episodic and the public investments in the controlled markets that bolstered them were not fiscally sustainable. Since maize will remain a crucial part of the food security equation even while the agricultural economies of the region diversify, continued investments in both maize research and market institutions, some of which must be public, are essential. The most vital question, however, is where the domestic political pressure to support these investments will originate-an issue related to governance.
Rapid tissue oxygenation mapping from snapshot structured-light images with adversarial deep learning
Creators: name: Chen, Mason T.
name: Durr, Nicholas J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Spatial frequency domain imaging (SFDI) is a powerful technique for mapping tissue oxygen saturation over a wide field of view. However, current SFDI methods either require a sequence of several images with different illumination patterns or, in the case of single snapshot optical properties (SSOP), introduce artifacts and sacrifice accuracy. To avoid this tradeoff, we introduce OxyGAN: a data-driven, content-aware method to estimate tissue oxygenation directly from single structured light images using end-to-end generative adversarial networks. Conventional SFDI is used to obtain ground truth tissue oxygenation maps for ex vivo human esophagi, in vivo hands and feet, and an in vivo pig colon sample under 659 nm and 851 nm sinusoidal illumination. We benchmark OxyGAN by comparing to SSOP and to a two-step hybrid technique that uses a previously-developed deep learning model to predict optical properties followed by a physical model to calculate tissue oxygenation. When tested on human feet, a cross-validated OxyGAN maps tissue oxygenation with an accuracy of 96.5%. When applied to sample types not included in the training set, such as human hands and pig colon, OxyGAN achieves a 93.0% accuracy, demonstrating robustness to various tissue types. On average, OxyGAN outperforms SSOP and a hybrid model in estimating tissue oxygenation by 24.9% and 24.7%, respectively. Lastly, we optimize OxyGAN inference so that oxygenation maps are computed ~10 times faster than previous work, enabling video-rate, 25Hz imaging. Due to its rapid acquisition and processing speed, OxyGAN has the potential to enable real-time, high-fidelity tissue oxygenation mapping that may be useful for many clinical applications.
Phase transition for parking blocks, Brownian excursion and coalescence
Creators: name: Chassaing, Philippe
name: Louchard, Guy
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: A.M.S: 60C05, 60J65, 60F05, 68P10, 68R05

description: In this paper, we consider hashing with linear probing for a hashing table with m places, n items (n < m), and l = m
The psychometrics of a bipolar valence activation model of self-reported affect
Creators: name: Carroll, James M.
Publisher: name: University of British Columbia
Year: 2009

description: Since the 1950's, researchers have sought unsuccessfully to identify a consensual psychometric structure of self-reported affect. One unresolved question, central to any psychometric model, is whether the structure includes bipolar or unipolar dimensions. For example, are positive and negative affect two ends of the same bipolar dimension or are they better represented by separable unipolar dimensions? In contrast to what has been assumed in previous analyses, a bipolar model is presented that distinguishes between two forms of bipolarity, each with its own conceptual definition, operational definition, and statistical properties. It is shown both conceptually and empirically that the two forms of bipolarity lead to different results when examined by traditional psychometric methods such as exploratory factor analysis, confirmatory factor analysis, and the linear correlation. Furthermore, when the bipolar model is applied to previous analyses, the psychometric evidence that has suggested unipolar dimensions can be interpreted as evidence suggesting bipolar dimensions. Two studies were conducted to examine specific predictions of the bipolar model. Study 1 examined judgements of the hypothesized opposites of hot-cold and happy-sad. Study 2 examined judgments of affect terms based on a circumplex model of affect characterized by orthogonal valence and activation dimensions. In both studies the bipolar model is strongly supported. Furthermore, the analyses highlighted specific problems with current methods that emphasize sophisticated techniques based on the correlation coefficient and demonstrated the utility of more simple descriptive statistics.
On weakly non-local, nilpotent, and super-recursion operators for N=1 super-equations
Creators: name: Kiselev, A. V.
name: Wolf, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider nonlinear, scaling-invariant N=1 boson + fermion supersymmetric systems whose right-hand sides are homogeneous differential polynomials and satisfy some natural assumptions. We select the super-systems that admit infinitely many higher symmetries generated by recursion operators; we further restrict ourselves to the case when the dilaton dimensions of the bosonic and fermionic super-fields coincide and the weight of the time is half the weight of the spatial variable. We discover five systems that satisfy these assumptions; one system is transformed to the purely bosonic Burgers equation. We construct local, nilpotent, triangular, weakly non-local, and super-recursion operators for their symmetry algebras.
description: 6 pages, no figures. Proc. Int. Workshop `Supersymmetries and Quantum Symmetries-05,' JINR, Dubna, 27-31 July 2005. MSC 2000: 35Q53, 37K05, 37K10, 81T40
Receptor Saturation Modeling for Synaptic DMC
Creators: name: Lotter, Sebastian
name: Schäfer, Maximilian
name: Zeitler, Johannes
name: Schober, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Emerging Technologies (cs.ET)
subject: Information Theory (cs.IT)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Synaptic communication is a natural Molecular Communication (MC) system which may serve as a blueprint for the design of synthetic MC systems. In particular, it features highly specialized mechanisms to enable inter-symbol interference (ISI)-free and energy efficient communication. The understanding of synaptic MC is furthermore critical for disruptive innovations in the context of brain-machine interfaces. However, the physical modeling of synaptic MC is complicated by the possible saturation of the molecular receiver arising from the competition of postsynaptic receptors for neurotransmitters. Saturation renders the system behavior nonlinear and is commonly neglected in existing analytical models. In this work, we propose a novel model for receptor saturation in terms of a nonlinear, state-dependent boundary condition for Fick's diffusion equation. We solve the resulting boundary-value problem using an eigenfunction expansion of the Laplace operator and the incorporation of the receiver memory as feedback system into the corresponding state-space description. The presented solution is numerically stable and computationally efficient. Furthermore, the proposed model is validated with particle-based stochastic computer simulations.
description: 6 pages, 1 table, 4 figures. Presented at the 2021 IEEE International Conference on Communications (ICC)
Beckmann, Klaus-Martin: Die Kirche und die Rassenfrage
Creators: name: Linnenbrink, Günter
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 17 Nr. 2 (1968): Ökumenische Rundschau, Band 17, Heft 2
DEMAND FOR RAINFALL-INDEX BASED INSURANCE: A CASE STUDY FROM MOROCCO
Creators: name: McCarthy, Nancy
name: McCarthy, Nancy
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: Agricultural Insurance
subject: Dryland Agriculture
subject: Willingness to Pay

description: In this paper, we derive estimates for willingness to pay for rainfall-index based insurance contracts. Surveys were undertaken in four regions in Morocco, representing different mean and variability of rainfall conditions. Results indicate that respondents in the high variability regions preferred contracts that paid out more often (had higher rainfall trigger levels), and which were more costly. In fact, a strong majority of respondents indicated they would purchase these contracts at the fair-value price; the estimated median willingness to pay for such contracts was between 12-20 percent above the fair value contract. However, in the lower rainfall variability regions, the cheaper contracts with lower trigger values were the only contracts for which the estimated median willingness to pay was greater than the fair-value of the contract. Finally, estimated coefficients for explanatory variables such as human and physical assets, debt levels, etc. did not have consistent impacts, either across or within regions.
Evidence for a Past Martian Ring from the Orbital Inclination of Deimos
Creators: name: Ćuk, Matija
name: Minton, David A.
name: Pouplin, Jennifer L. L.
name: Wishard, Carlisle
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We numerically explore the possibility that the large orbital inclination of the martian satellite Deimos originated in an orbital resonance with an ancient inner satellite of Mars more massive than Phobos. We find that Deimos's inclination can be reliably generated by outward evolution of a martian satellite that is about 20 times more massive than Phobos through the 3:1 mean-motion resonance with Deimos at 3.3 Mars radii. This outward migration, in the opposite direction from tidal evolution within the synchronous radius, requires interaction with a past massive ring of Mars. Our results therefore strongly support the cyclic martian ring-satellite hypothesis of Hesselbrock and Minton (2017). Our findings, combined with the model of Hesselbrock and Minton (2017), suggest that the age of the surface of Deimos is about 3.5-4 Gyr, and require Phobos to be significantly younger.
description: Accepted for ApJL
k-hyponormality of finite rank perturbations of unilateral weighted shifts
Creators: name: Curto, Raul E.
name: Lee, Woo Young
Publisher: name: arXiv
Year: 2005
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B20, 47B35, 47B37

description: In this paper we explore finite rank perturbations of unilateral weighted shifts $W_α$. First, we prove that the subnormality of $W_α$ is never stable under nonzero finite rank pertrubations unless the perturbation occurs at the zeroth weight. Second, we establish that 2-hyponormality implies positive quadratic hyponormality, in the sense that the Maclaurin coefficients of $D_n(s):=\text{det} P_n [(W_α+sW_α^2)^*, W_α+s W_α^2] P_n$ are nonnegative, for every $n\ge 0$, where $P_n$ denotes the orthogonal projection onto the basis vectors $\{e_0,...,e_n\}$. Finally, for $α$ strictly increasing and $W_α$ 2-hyponormal, we show that for a small finite-rank perturbation $α^\prime$ of $α$, the shift $W_{α^\prime}$ remains quadratically hyponormal.
description: 19 pages; to appear in Trans. Amer. Math. Soc
Surface structures of the magnetostrictive D03-Fe3Ga(001)
Creators: name: Ruvalcaba, Ricardo
name: Corbett, J. P.
name: Mandru, Andrada-Oana
name: Takeuchi, N.
name: Smith, Arthur R.
name: Guerrero-Sanchez, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: First-principles total energy calculations and experimental measurements were performed to study the surface reconstructions of the magnetostrictive Fe3Ga alloy. The magnetostrictive behavior was evaluated in the bulk by compressing and stretching its lattice parameter. Results demonstrate two thermodynamically stable surfaces, the 1x1 and 3x1 reconstructions. The 1x1 is an ideally FeGa terminated surface whereas the 3x1 is also FeGa terminated but it has a first-layer Fe atom substituted by a Ga atom every three unit-cells, forming stripe-like domain patterns. Tersoff-Hamann scanning tunneling microscopy simulations were obtained and compared with experimental results. We found good agreement between theory and experiment, in which the distance between rows is ~1.23 nm. The substrate-induced strain increases the stability of the 3x1 reconstruction. Here we have demonstrated that Ga/Fe atomic exchanges lead to the stripe-like domain patterns. Clarification of the atomic reconstructions present on the magnetostrictive Fe3Ga alloys is an important step towards the understanding of its surfaces and poses this system as a potential candidate to be used as part of perpendicular magnetic tunnel junctions due to the existing perpendicular magnetic anisotropy effect when grown on different substrates.
description: 21 pages, 4 figures, to be published in Applied Surface Science
IRRIGATION AND WATER RESOURCES IN LATIN AMERICA AND THE CARIBBEAN: CHALLENGES AND STRATEGIES
Creators: name: Ringler, Claudia
name: Rosegrant, Mark W.
name: Paisner, Michael S.
name: Ringler, Claudia
name: Rosegrant, Mark W.
name: Paisner, Michael S.
Publisher: name: Unknown
Year: 2000
Subjects: Resource /Energy Economics and Policy

description: Latin America and the Caribbean are relatively well endowed with water resources. However, population growth and rapid urbanization are putting considerable pressure on water available for irrigation. Local and regional water scarcity problems are exacerbated by severe water quality problems; and wastewater is frequently used for irrigation. Moreover, prospects for new investments into irrigation development appear limited. This paper examines the factors underlying irrigation development in Latin America and the Caribbean, reviews the water supply situation, and describes trends in water demand and irrigated agriculture. The overall water management in the region is assessed, and recent trends in investments in the water sector, with a focus on large-scale irrigation systems, are analyzed. The paper concludes that in this context of accelerating demand and declining irrigation investments, new water development is not the primary solution to water resource challenges in the region. Much greater attention is needed on water policy and management reform to improve the efficiency and equity of irrigation and water supply systems. In order to pay for future investments, irrigated agriculture needs to produce high-value crops for both local consumption and exports into competitive world markets. Policies to officially transfer management responsibilities from agencies to farmers - and to privatize urban water supply and sanitation - are increasingly important. The complex tradeoffs across sectors and across water uses can best be managed through integrated water management at the river basin level—but developing appropriate institutions for intersectoral water allocation remains an important challenge under the fragmented management structure in most of Latin America and the Caribbean. Thus, the challenges for water policymakers in the region are great, but a strategy that focuses on river basin management, irrigation management transfer and privatization, and market-based water allocation can effectively address these challenges.
Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor
Creators: name: Qi, Ji
name: Dong, Baojuan
name: Zhang, Zhe
name: Zhang, Zhao
name: Chen, Yanna
name: Zhang, Qiang
name: Danilkin, Sergey
name: Chen, Xi
name: Fu, Liangwei
name: Jiang, Xiaoming
name: Chai, Guozhi
name: Hiroi, Satoshi
name: Ohara, Koji
name: Zhang, Zongteng
name: Ren, Weijun
name: Yang, Teng
name: Zhou, Jianshi
name: Osami, Sakata
name: He, Jiaqing
name: Yu, Dehong
name: Li, Bing
name: Zhang, Zhidong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A solid with larger sound speeds exhibits higher lattice thermal conductivity (k_{lat}). Diamond is a prominent instance where its mean sound speed is 14400 m s-1 and k_{lat} is 2300 W m-1 K-1. Here, we report an extreme exception that CuP2 has quite large mean sound speeds of 4155 m s-1, comparable to GaAs, but the single crystals show a very low lattice thermal conductivity of about 4 W m-1 K-1 at room temperature, one order of magnitude smaller than GaAs. To understand such a puzzling thermal transport behavior, we have thoroughly investigated the atomic structure and lattice dynamics by combining neutron scattering techniques with first-principles simulations. Cu atoms form dimers sandwiched in between the layered P atomic networks and the dimers vibrate as a rattling mode with frequency around 11 meV. This mode is manifested to be remarkably anharmonic and strongly scatters acoustic phonons to achieve the low k_{lat}. Such a dimer rattling behavior in layered structures might offer an unprecedented strategy for suppressing thermal conduction without involving atomic disorder.
description: four figures and one table in the main text
Os níveis de stress dos alunos de licenciatura, da UCP – Viseu
Creators: name: Costa, Bruno
name: Lopes, Fábio
name: Neves, Mauro
name: Pereira, Paulo Almeida
Publisher: name: Gestão e Desenvolvimento
Year: 2008

description: Com este trabalho, realizado no ano lectivo de 2007/2008, pretende analisar-se os níveis de stress na comunidade académica da UCP – Viseu, bem como as estratégias de coping desenvolvidas para o combater, temática que pode contribuir para a compreensão da forma como os alunos respondem às mudanças, nesta fase da sua vida, repleta de novos desafios e incertezas, que podem estar na origem de desequilíbrios emocionais e no esgotamento dos estudantes. São apresentadas definições dos conceitos de stress e estratégias de coping, abordando-se também as mudanças inerentes à transição para o ensino superior e as tarefas que precisam de superar ao longo do ciclo de estudos. Procede-se ao enquadramento metodológico do estudo, com a caracterização da população em estudo, método de selecção da amostra, apresentação de objectivos e hipóteses e do instrumento de recolha de informação. A análise permite determinar os factores de stress e as estratégias de coping predominantes, bem como a sua relação com os cursos frequentados pelos alunos, o facto de estar no início ou fim do curso e as variáveis de caracterização sexo, idade e nível sócio-económico. Finalmente são determinadas as relações existentes entre o stress e respectivos factores e o coping e respectivas estratégias.
description: Gestão e Desenvolvimento, n. 15-16 (2008)
THE DEMAND FOR CROP GENETIC RESOURCES: INTERNATIONAL USE OF THE U.S. NATIONAL PLANT GERMPLASM SYSTEM
Creators: name: Smale, Melinda
name: Day-Rubenstein, Kelly A.
name: Zohrabian, Armineh
name: Hodgkin, T.
name: Smale, Melinda
name: Day-Rubenstein, Kelly A.
name: Zohrabian, Armineh
name: Hodgkin, T.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Crop Production/Industries
subject: developing countries
subject: crop genetic resources
subject: plant breeding
subject: germplasm collection

description: In contrast to a perception that ex situ collections of germplasm are rarely used, this empirical case study reveals large quantities of germplasm samples distributed by the U.S. National Germplasm System to many types of scientific institutions located in numerous countries around the world. Distributions favor developing countries in several ways including the numbers of samples shipped, utilization rates in crop breeding programs, and the secondary benefits brought about through sharing this germplasm with other scientists. Expected future demand is also greater among scientists in developing countries. These findings underscore the importance to global science and technology of retaining such resources in the public domain.
Additional file 3 of Fluid proteomics of CSF and serum reveal important neuroinflammatory proteins in blood–brain barrier disruption and outcome prediction following severe traumatic brain injury: a prospective, observational study
Creators: name: Lindblad, Caroline
name: Pin, Elisa
name: Just, David
name: Faiez Al Nimer
name: Nilsson, Peter
name: Bo-Michael Bellander
name: Svensson, Mikael
name: Piehl, Fredrik
name: Thelin, Eric Peter
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Hematology

description: Additional file 3: Supplementary Tables 1–7 (Tables S1–S7).
Gestão municipal da educação: lógicas de sobrevivência e de desenvolvimento estratégico
Creators: name: Simões, Aleixo Augusto Figueiras
name: Ferreira, Fernando Ilídio
Publisher: name: Gestão e Desenvolvimento
Year: 2012

description: A relação entre Educação e Desenvolvimento constituiu a temática deste artigo, que, através da análise documental das Cartas Educativas dos nove concelhos da Beira Interior Norte –NUT III, perscruta as representações, tendências e tensões patentes nas propostas apresentadas. Uma ideia sobressaiu: a premência dos problemas faz com que a ação municipal se situe entre o estabelecimento de patamares de sobrevivência e a implementação de estratégias com vista à garantia da estabilidade mínima para o futuro. Enunciámos uma das principais tensões em duas palavras-chave do título: sobrevivência e estratégia. Estamos perante uma situação em que os problemas do território, em boa verdade, já não dependem da ação dos seus intervenientes diretos, limitando-se estes, frequentemente, a menorizar e a resolver pontualmente situações de pré rutura ou rutura, especialmente a variável demográfica. Consideramos, no entanto, que só através de políticas de âmbito mais global (políticas nacionais, locais e transnacionais, nomeadamente da União Europeia), que valorizem estes territórios do Interior, conjugando serviços públicos de apoio, valorizando as relações de proximidade e descriminando positivamente estes espaços, se conseguirá inverter estas tendências, resolvendo simultaneamente dois problemas: o do Interior com um ‘repovoamento’ e melhoria dos seus apports competitivos e o do Litoral que enferma de uma excessiva concentração populacional, ficando assim menos congestionado e de mais fácil gestão. É neste contexto que poderemos encarar a atuação dos municípios na área educativa: por um lado, procuram garantir os níveis mínimos de sobrevivência dos serviços destinados aos seus munícipes, e, por outro, intentam arquitetar estratégias que permitam visualizar uma ‘janela de esperança’ para inverter o rumo dos acontecimentos.
description: Gestão e Desenvolvimento, n. 20 (2012)
Solutions of definable ODEs with regular separation and dichotomy interlacement versus Hardy
Creators: name: Gal, Olivier Le
name: Matusinski, Mickaël
name: Sánchez, Fernando Sanz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: Differential Geometry (math.DG)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 34C08, 34D05, 03C64 (Primary), 14P15, 32B20 (Secondary)

description: We introduce a notion of regular separation for solutions of systems of ODEs $y'=F(x,y)$, where F is definable in a polynomially bounded o-minimal structure and $y = (y_1,y_2)$. Given a pair of solutions with flat contact, we prove that, if one of them has the property of regular separation, the pair is either interlaced or generates a Hardy field. We adapt this result to trajectories of three-dimensional vector fields with definable coefficients. In the particular case of real analytic vector fields, it improves the dichotomy interlaced/separated of certain integral pencils obtained by F. Cano, R. Moussu and the third author. In this context, we show that the set of trajectories with the regular separation property and asymptotic to a formal invariant curve is never empty and it is represented by a subanalytic set of minimal dimension containing the curve. Finally, we show how to construct examples of formal invariant curves which are transcendental with respect to subanalytic sets, using the so-called (SAT) property introduced by J.-P. Rolin, R. Shaefke and the third author.
description: 25 pages
Ballistic transport is dissipative: the why and how
Creators: name: Das, Mukunda P.
name: Green, Frederick
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the ballistic limit, the Landauer conductance steps of a mesoscopic quantum wire have been explained by coherent and dissipationless transmission of individual electrons across a one-dimensional barrier. This leaves untouched the central issue of conduction: a quantum wire, albeit ballistic, has finite resistance and so must dissipate energy. Exactly HOW does the quantum wire shed its excess electrical energy? We show that the answer is provided, uniquely, by many-body quantum kinetics. Not only does this inevitably lead to universal quantization of the conductance, in spite of dissipation; it fully resolves a baffling experimental result in quantum-point-contact noise. The underlying physics rests crucially upon the action of the conservation laws in these open metallic systems.
description: Invited Viewpoint article
THE EMERGENCE AND SPREADING OF AN IMPROVED TRADITIONAL SOIL AND WATER CONSERVATION PRACTICE IN BURKINA FASO
Creators: name: Kabore, Daniel
name: Reij, Chris
name: Kabore, Daniel
name: Reij, Chris
Publisher: name: Unknown
Year: 2004
Subjects: subject: Resource /Energy Economics and Policy
subject: soil fertility
subject: soil conservation
subject: water conservation

description: This paper describes the emergence of improved traditional planting pits (zaï) in Burkina Faso in the early 1980s as well as their advantages, disadvantages and impact. The zaï emerged in a context of recurrent droughts and frequent harvest failures, which triggered farmers to start improving this local practice. Despair triggered experimentation and innovation by farmers. These processes were supported and complemented by external intervention. Between 1985 and 2000 substantial public investment has taken place in soil and water conservation (SWC). The socio-economic and environmental situation on the northern part of the Central Plateau is still precarious for many farming families, but the predicted environmental collapse has not occurred and in many villages indications can be found of both environmental recovery and poverty reduction.
Space and identity formation in twentieth-century Canadian realist novels : recasting regionalism within Canadian literary studies
Creators: name: Chalykoff, Lisa
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation develops and demonstrates a new mode of regional literary analysis. I begin by assessing the work of five Canadian literary regionalists from perspectives provided by human geographers and spatial theorists. Although discourses of Canadian literary regionalism vary, I argue that this field has tended to rely upon a reified understanding of regional analysis, a mystified conception of regional identity, and a passive construction of regional space. I offer a means of disrupting these tendencies by re-imagining the process of regional literary analysis. As I define it, literary regionalism is the process of demonstrating patterns in the way that literary texts deploy representations of sociomaterial space to enable performances of identity. This approach foregrounds literature's capacity to elucidate space's social efficacy. It also directs literary regionalism towards a more contemporary understanding of space and identity. In part two I begin to apply my mode of analysis to eight twentieth-century Canadian realist novels by introducing the concept of place. Because place-studies focus on the organization of social relations within a single text, I argue that they offer a useful means of initiating cross-textual, regional analyses. I demonstrate this point by analyzing the relationship between place and gender identity in Charles Bruce's The Channel Shore, and then looking for parallels in the way other novels articulate this relationship. In part three I construct a "region of denial and purgation" by interrogating how and why authors deploy representations of nature to deny the social origins of identity formation. I relate the power such representations have to articulate seemingly epiphanic shifts in identity to the sublime's enduring legacy. Because sublime experience enables characters to reconstitute themselves as new, it facilitates their desires to purge those aspects of their personal histories that have caused them guilt or shame. I conclude that this dissertation makes two contributions to Canadian literary studies. First, it advances a productive dialogue between human geography and Canadian literary studies. Second, by re-imagining the practice of Canadian literary regionalism through alternate disciplinary lenses, this dissertation helpfully foregrounds the heterodox character—and'unexplored potential—of a regional mode of literary analysis.
Dinâmicas de construção de um ‘mega agrupamento’ de escolas. Uma abordagem sistémica Luhmanniana
Creators: name: Salgueiro, João Esteves
name: Henriques, Susana
Publisher: name: Gestão e Desenvolvimento
Year: 2017

description: O texto que se apresenta parte da possibilidade de as dinâmicas de construção de um ‘mega agrupamento’ poderem fazer ressaltar elementos inovadores sustentados na produção de mecanismos autopoiéticos. Para o efeito, convoca-se a teoria dos sistemas sociais do sociólogo alemão Niklas Luhmann, numa abordagem teórica e metodológica, utilizando-se como instrumentos de recolha de dados a entrevista semidiretiva e notas de campo. Para a análise do corpus documental recorre-se ao método de análise de conteúdo.
description: Gestão e Desenvolvimento, n. 25 (2017)
Impact of large-x resummation on parton distribution functions
Creators: name: Corcella, Gennaro
name: Magnea, Lorenzo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the effect of large-x resummation on parton distributions by performing a fit of Deep Inelastic Scattering data from the NuTeV, BCDMS and NMC collaborations, using NLO and NLL soft-resummed coefficient functions. Our results show that soft resummation has a visible impact on quark densities at large x. Resummed parton fits would therefore be needed whenever high precision is required for cross sections evaluated near partonic threshold.
description: 5 pages, 5 figures. Talk given at DIS 2005, XIII Workshop on Deep Inelastic Scattering, April 27-May 1, 2005, Madison, WI, U.S.A
The stability of Killing-Cauchy horizons in colliding plane wave space-times
Creators: name: Griffiths, J. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is confirmed rigorously that the Killing-Cauchy horizons, which sometimes occur in space-times representing the collision and subsequent interaction of plane gravitational waves in a Minkowski background, are unstable with respect to bounded perturbations of the initial waves, at least for the case in which the initial waves have constant aligned polarizations.
description: 8 pages. To appear in Gen. Rel. Grav
Hawking Radiation as Tunneling through the Quantum Horizon
Creators: name: Arzano, Michele
name: Medved, A. J. M.
name: Vagenas, Elias C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Planck-scale corrections to the black-hole radiation spectrum in the Parikh-Wilczek tunneling framework are calculated. The corrective terms arise from modifications in the expression of the surface gravity in terms of the mass-energy of the black hole-emitted particle system. The form of the new spectrum is discussed together with the possible consequences for the fate of black holes in the late stages of evaporation.
description: 13 pages; the contents of this paper overlap somewhat with the earlier submissions hep-th/0504188 and gr-qc/0505015; (v2) references added and various cosmetic (but no physics) changes, to appear in JHEP
On the effect of linear feedback and parametric pumping on a resonators frequency stability
Creators: name: Mohammadi, Zohreh
name: Heugel, Toni L.
name: Miller, James M. L.
name: Shin, Dongsuk D.
name: Kwon, Hyun-Keun
name: Kenny, Thomas W.
name: Chitra, Ramasubramanian
name: Zilberberg, Oded
name: Villanueva, Luis Guillermo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Resonant sensors based on Micro- and Nano-Electro Mechanical Systems (M/NEMS) are ubiquitous in many sensing applications due to their outstanding performance capabilities, which are directly proportional to the quality factor (Q) of the devices. We address here a recurrent question in the field: do dynamical techniques that modify the effective Q (namely parametric pumping and direct drive velocity feedback) affect the performance of said sensors? We develop analytical models of both cases, while remaining in the linear regime, and introduce noise in the system from two separate sources: thermomechanical and amplifier (read-out) noise. We observe that parametric pumping enhances the quality factor in the amplitude response, but worsens it in the phase response on the resonator. In the case of feedback, we find that Q is enhanced in both cases. Then, we establish a solution for the noisy problem with direct drive and parametric pumping simultaneously. We also find that, in the case when thermomechanical noise dominates, no benefit can be obtained from neither artificial Q-enhancement technique. However, in the case when amplifier noise dominates, we surprisingly observe that a significant advantage can only be achieved using parametric pumping in the squeezing region.
Laser-assisted photoionization of argon atoms: streaking, sideband and pulse train studying cases
Creators: name: Della Picca, Renata
name: Ciappina, Marcelo F.
name: Lewenstein, Maciej
name: Arbó, Diego G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a theoretical study of atomic laser-assisted photoionization emission (LAPE). We consider an atom driven by a linearly polarized XUV laser in two different scenarios: i) a single attosecond pulse (in both the streaking and sideband regimes) and ii) an attosecond pulse train. The process takes place assisted by a linearly polarized infrared (IR) laser field. In all these cases the energy and angle-resolved photoelectron spectrum (PES) is determined by a leading contribution, related to the intracycle factor [Gramajo et al., J. Phys. B 51, 055603 (2018)], complemented by other ones, derived from the periodicity and symmetry properties of the dipole transition matrix with respect to the IR field. Each of these terms imprint particular features in the PES that can be straightforwardly understood in terms of generalized energy conservation laws. We investigate in detail these PES structures, in particular, for the case of argon initially in the 3s quantum state. Our theoretical scheme, based on the strong-field approximation (SFA), can be applied, however, to other atomic species and field configurations as well.
description: 10 pages, 8 figures
Inflation at the TeV scale with a PNGB curvaton
Creators: name: Dimopoulos, Konstantinos
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate a particular type of curvaton mechanism, under which inflation can occur at Hubble scale of order 1 TeV. The curvaton is a pseudo Nambu-Goldstone boson, whose order parameter increases after a phase transition during inflation, triggered by the gradual decrease of the Hubble scale. The mechanism is studied in the context of modular inflation, where the inflaton is a string axion. We show that the mechanism is successful for natural values of the model parameters, provided the phase transition occurs much earlier than the time when the cosmological scales exit the horizon. Also, it turns our that the radial mode for our curvaton must be a flaton field.
description: 14 pages, 1 figure