cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
THE REACTION OF THE "ENVIRONMENT SPERMATOZOA" SYSTEMS TO THE DAMAGING EFFECT OF EXOGENIC FACTORS
Creators: name: Maksymyuk, V.
name: Sedilo, H.
name: Maksymyuk, A.
name: Melnyk, O.
name: Vorobets, M.
name: Stadnytska, O.
Publisher: name: The Scientific Heritage
Year: 2021
Subjects: spermatozoa
sperm plasma
Na+ -
K+ -
Ca2+ -concentration.

description: It is experimentally established the ability of breeders (bulls), regardless of breed (Holstein, British-Frisian, German, local, Simmental, Red Danish, Limousin, Aberdeen-Angus), age (2-9 years) and season of the year (winter, spring, summer, autumn), constantly secrete semen with low (17−33 mM), medium (36–43 mM) and high (60−66 mM) К + concentration limits. The constancy of different levels of concentration is related to the quality parameters of sperm of native and deconserved sperm, namely: low and high values reduce their motility and viability. Harmful effect of extreme conditions of sperm cryopreservation technologies stages significantly changes the initial levels of ion concentration. In sperm of freshly obtained, diluted, equilibrated and deconserved sperm, the dynamics of Са2+ parameters is: 1,2−1,5−1,7−0,9 mM respectively; К+ − 15−14−14−4 mM; Na+ − 19−15−15−41 mM. The imbalance of homeostasis of the components of the binary system "sperm uterine-vaginal mucus" formed by the harmful effect of exogenous factors leads to low fertilization of egg-cells by spermatozoons of freshly obtained and deconserved sperm. The results and conclusions of the work expand the idea of the possibility of objective monitoring and forecasting the levels of fertility of sperm by certain parameters of the ratios of the concentration of one(Са2+:Са2+ , К + :К+ , Na+ :Na+ ) and different (Na+ :Са2+, К+ :Са2+ , Na+ :К+ ) pairs of alkali metal ions. Analysis of data published by modern sources of scientific information shows that the developed methods of research of the "reaction-response" of the components of open and closed systems such as "environment cell (substance)" can be used for in-depth study of physical and chemical, transmembrane processes that occur due to the harmful effects of exogenous factors on isolated and non-isolated cells of humans and animals.
Discovery of disc precession in the M31 dipping X-ray binary Bo 158
Creators: name: Barnard, R.
name: Foulkes, S. B.
name: Haswell, C. A.
name: Kolb, U.
name: Osborne, J. P.
name: Murray, J. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from three XMM-Newton observations of the M31 low mass X-ray binary XMMU J004314.4+410726.3 (Bo 158), spaced over 3 days in 2004, July. Bo 158 was the first dipping LMXB to be discovered in M31. Periodic intensity dips were previously seen to occur on a 2.78-hr period, due to absorption in material that is raised out of the plane of the accretion disc. The report of these observations stated that the dip depth was anti-correlated with source intensity. However, our new observations do not favour a strict intensity dependance, but rather suggest that the dip variation is due to precession of the accretion disc. This is to be expected in LMXBs with a mass ratio
description: 9 pages, 6 figures, accepted for publication by MNRAS, changed content
Tractable Fragments of Temporal Sequences of Topological Information
Creators: name: Cohen-Solal, Quentin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we focus on qualitative temporal sequences of topological information. We firstly consider the context of topological temporal sequences of length greater than 3 describing the evolution of regions at consecutive time points. We show that there is no Cartesian subclass containing all the basic relations and the universal relation for which the algebraic closure decides satisfiability. However, we identify some tractable subclasses, by giving up the relations containing the non-tangential proper part relation and not containing the tangential proper part relation. We then formalize an alternative semantics for temporal sequences. We place ourselves in the context of the topological temporal sequences describing the evolution of regions on a partition of time (i.e. an alternation of instants and intervals). In this context, we identify large tractable fragments.
An algorithmic approach to resolutions
Creators: name: Green, Edward L.
name: Solberg, Øyvind
Publisher: name: arXiv
Year: 2005
Subjects: subject: K-Theory and Homology (math.KT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16E05, 18G10, 16P10, 16S37

description: We provide an algorithmic method for constructing projective resolutions of modules over quotients of path algebras. This algorithm is modified to construct minimal projective resolutions of linear modules over Koszul algebras.
CNS pharmacokinetics of diphenhydramine in sheep
Creators: name: Yeung, Sam Au
Publisher: name: University of British Columbia
Year: 2009

description: The CNS pharmacokinetics of the Hrreceptor antagonist, diphenhydramine (DPHM), was studied in 100 d (103.5 ± 1.7 d) and 120 d (124.1 ± 1.4 d) fetuses, 10 cl (11.5 ± 1.6 d) and 30 d (33.8 ± 1.2 d) newborn lambs, and adult sheep (5.21 ± 2.83 years) using in vivo microdialysis. The first study involved i.v. administration of DPHM at 5 infusion rates to the animals, with each step lasting 7 h. At all ages, CSF and ECF concentrations were very similar to each other, which suggested that the transfer of DPHM between these two compartments was by passive diffusion. Also, the brain-toplasma concentration ratios were 3 or higher in all age groups indicating the existence of an active transport process for DPHM into the brain. Both brain and plasma DPHM concentrations increased in a linear fashion over the dose range studied. Clj was the lowest in adult sheep, likely due to active renal tubular reabsorption of the drug. On the other hand, the factors f[sub csF] and f[sub ecF] decreased with age, indicating that DPHM was more efficiently removed from the brain as age increased. The extent of plasma protein binding of the drug increased with age. Vds s dropped postnatally in the newborn lambs and increased significantly in the adults. In the second study, DPHM was infused for 8 h and propranolol (PRN) was coinfused from 4 - 8 h. The purpose was to examine the effects of PRN on blood brain CSF and blood-brain ECF relationships. Pharmacokinetic analysis showed that CIT was not significantly different from that in the 5-step infusion study but AUC[sub brain]/AUC[sub piasma] ratios ( f[sub csF] and f[sub ecF]) increased in all age groups after PRN coadministration. On the other hand, protein binding was not changed by PRN. The observed increase in f ratios appears to be due to the inhibitory effects of PRN on a transporter-mediated mechanism for DPHM brain elimination. PRN also caused decreases in heart rate in all groups except the 100 d fetuses. In summary, these two studies suggest the existence of transporter-mediated mechanisms for the influx and efflux of DPHM into and out of the brain. While postulations have been made as to the possible identities of these transporters, further work is needed in order to obtain a definitive answer.
Drell-Yan process in soft-collinear effective theory near end-point
Creators: name: Lee, Jong-Phil
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Drell-Yan process is analyzed in soft-collinear effective theory near the end-point region. It is assumed that the relevant final-state hadron energy $Q(1-z)$ where $z$ is the momentum fraction transferred to the virtual photon is the typical hadronic scale $\simΛ$, thus no intermediate scale exists. It is shown that this setup successfully reproduces the full theory results. We also discuss the factorized soft Wilson lines for the Drell-Yan process.
description: 18 pages, 6 figures. More discussions, references added. PRD accepted version
Non-Credit Services of Group-Based Financial Institutions: Implications for Smallholder Women’s Honey Income in Arid and Semi Arid Lands of Kenya
Creators: name: Otieno, Peter Shimon
name: Nyikal, Rose Adhiambo
name: Mugivane, Fred Inuani
name: Otieno, Peter Shimon
name: Nyikal, Rose Adhiambo
name: Mugivane, Fred Inuani
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Credit
subject: Finance
subject: Honey
subject: Makueni

description: This paper analyses the effect of non-credit services of joint liability credit institutions on smallholder women beekeepers’ honey income. The non-credit services offered to the beekeepers are mainly enterprise development services (training on marketing, business, production and subsector analysis). The study uses cross-sectional data from a survey of women beekeepers participating in group-based credit programmes; the survey was conducted in September 2005 in Makueni district of Kenya. The findings indicate that the number of enterprise development related trainings attended by women beekeepers that are offered by the group-based financial institutions positively and significantly influence honey income. The results confirm that non-credit services contribute positively to the enhancement of honey income. These results imply that extension and strengthening of group-based financial institutions’ non-credit services in the marginal areas will enhance development of smallholder agriculture for improved income generation.
Robust Output Feedback Consensus for Networked Heterogeneous Nonlinear Negative-Imaginary Systems
Creators: name: Shi, Kanghong
name: Vladimirov, Igor G.
name: Petersen, Ian R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: This paper provides a control protocol for the robust output feedback consensus of networked heterogeneous nonlinear negative-imaginary (NI) systems. Heterogeneous nonlinear output strictly negative-imaginary (OSNI) controllers are applied in positive feedback according to the network topology to achieve output feedback consensus. The main contribution of this paper is extending the previous studies of the robust output feedback consensus problem for networked heterogeneous linear NI systems to nonlinear NI systems. Output feedback consensus is proved by investigating the internal stability of the closed-loop interconnection of the network of heterogeneous nonlinear NI plants and the network of heterogeneous nonlinear OSNI controllers according to the network topology. The network of heterogeneous nonlinear NI systems is proved to be also a nonlinear NI system, and the network of heterogeneous nonlinear OSNI systems is proved to be also a nonlinear OSNI system. Under suitable conditions, the nonlinear OSNI controllers lead to the convergence of the outputs of all nonlinear NI plants to a common limit trajectory, regardless of the system model of each plant. Hence, the protocol is robust with respect to parameter perturbation in the system models of the heterogeneous nonlinear NI plants in the network.
description: 6 pages, 9 figures
Evaluation de la diffusion et de l’adoption des variétés de riz NERICA en Guinée
Creators: name: Diagne, Aliou
name: Sogbossi, Marie-Josee
name: Diawara, Sekou
name: Diallo, Abdoulaye Sadio
name: Barry, Alpha Bacar
name: Diagne, Aliou
name: Sogbossi, Marie-Josee
name: Diawara, Sekou
name: Diallo, Abdoulaye Sadio
name: Barry, Alpha Bacar
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Land Economics/Use
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: Mots clés Riz
subject: NERICA
subject: Diffusion
subject: Adoption
subject: Average Treatment Effect
subject: Guinée

description: L’objectif de la présente étude est d’évaluer la diffusion et l’adoption des variétés de riz NERICA en Guinée cinq années après leur introduction. Les données collectées en 2002 sont relatives à 1535 paysans choisis dans 79 villages des quatre régions naturelles de la Guinée. L’approche d’estimation du taux d’adoption utilisée dans ce papier se fonde sur les théories modernes d’évaluation au niveau micro-économique des impacts d’interventions politiques. Nos résultats montrent que 39% de la population guinéenne connaissaient au moins une variété NERICA en 2001 avec 23% pour le taux d’adoption observé au sein de la population de riziculteurs. Plusieurs facteurs socio-économiques déterminent les taux de diffusion et d’adoption. Par ailleurs bien que le taux d’adoption ait connu une croissance de 1996 à 2001, il est resté inférieur au taux d’adoption potentiel (53%) si tous les paysans avaient accès aux semences de NERICA en 2001. Des mesures méritent donc d’être prises pour une meilleure diffusion des NERICA et surtout des NERICA bas-fond en Guinée.
Interplay between geometric and dynamic phases in a single spin system
Creators: name: Wood, A. A.
name: Streltsov, K.
name: Goldblatt, R. M.
name: Plenio, M. B.
name: Hollenberg, L. C. L.
name: Scholten, R. E.
name: Martin, A. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use a combination of microwave fields and free precession to drive the spin of a nitrogen-vacancy (NV) center in diamond on different trajectories on the Bloch sphere, and investigate the physical significance of the frame-dependent decomposition of the total phase into geometric and dynamic parts. The experiments are performed on a two-level subspace of the spin-1 ground state of the NV, where the Aharonov-Anandan geometric phase manifests itself as a global phase, and we use the third level of the NV ground state triplet to detect it. We show that while the geometric Aharonov-Anandan phase retains its connection to the solid angle swept out by the evolving spin, it is generally accompanied by a dynamic phase that suppresses the geometric dependence of the system dynamics. These results offer insights into the physical significance of frame-dependent geometric phases.
description: 10 pages, 5 figures
Does Participation in Microfinance Programs Improve Household Incomes: Empirical Evidence From Makueni District, Kenya
Creators: name: Kiiru, Joy M.
name: Mburu, John G.
name: Klaus, Flohberg
name: Kiiru, Joy M.
name: Mburu, John G.
name: Klaus, Flohberg
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural Finance
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Financial Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Health Economics and Policy
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: household
subject: incomes
subject: Kenya
subject: Makueni

description: Although microfinance has elicited different reactions from different stakeholders, there seems to be a general agreement that it is useful in reducing poverty. This study is an attempt to contribute in to the debate on the impact of microfinance on household incomes. We use a pooled data set collected from the south western part of Makueni district in Kenya to study the households’ access to microfinance credit and how the credit affects their incomes. We control for household selection bias as well as endogenity problems in the sample. Cross sectional analysis fails to show any significant positive impact of microfinance on poverty reduction. Only after the inclusion of time dynamics in the study are we able to find a weak positive significance of microfinance on household incomes.
Lightlike limit of the boosted Kerr black holes in higher-dimensional spacetimes
Creators: name: Yoshino, Hirotaka
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Deriving the gravitational field of the high-energy objects is an important theme because the black holes might be produced in particle collisions in the brane world scenario. In this paper, we develop a method for boosting the metric of the stationary objects and taking the lightlike limit in higher-dimensional spacetimes, using the Kerr black hole as one example. We analytically construct the metric of lightlike Kerr black holes and find that this method contains no ambiguity in contrast to the four-dimensional case. We discuss the possible implications of our results in the brane world context.
description: 13 pages, 3 figures, references added, typos corrected, will appear in Phys. Rev. D
A Discriminant Analysis of Factors Associated with The Adoption Of Certified Organic Farming By Smallholder Farmers in Kwazulu-Natal, South Africa
Creators: name: Kisaka-Lwayo, Maggie
name: Kisaka-Lwayo, Maggie
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Demand and Price Analysis
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Health Economics and Policy
subject: International Relations/Trade
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Adoption
subject: organic
subject: Discriminant Analysis
subject: South Africa

description: Discriminant analysis was used to identify the characteristics that distinguish between fully-certified organic, partially-certified organic and non-organic farmers in Umbumbulu district, KwaZulu-Natal (KZN), South Africa (SA) during October- November 2004. 200 farmers interviewed were drawn by purposively selecting the 151 members of the Ezemvelo Farmers’ Organisation (EFO), and by random sampling 49 non-organic farmers in wards neighbouring EFO. Results from the two estimated discriminant functions suggested that farmers with higher household sizes, incomes, input costs per hectare and number of chickens owned, locations further from innovators and less risk aversion were more likely to be certified as organic. Household location should be considered in delineating target domains for introducing new technologies especially where resources are limited. There is a need for key stakeholders to increase smallholder’s capacity to bear risk by decreasing the perceived risk of adoption of certified organic farming.
Directed chaos in a billiard chain with transversal magnetic field
Creators: name: Schanz, Holger
name: Prusty, Manamohan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In generic Hamiltonian systems with a mixed phase space chaotic transport may be directed and ballistic rather than diffusive. We investigate one particular model showing this behaviour, namely a spatially periodic billiard chain in which electrons move under the influence of a perpendicular magnetic field. We analyze the phase-space structure and derive an explicit expression for the chaotic transport velocity. Unlike previous studies of directed chaos our model has a parameter regime in which the dispersion of an ensemble of chaotic trajectories around its moving center of mass is essentially diffusive. We explain how in this limit the deterministic chaos reduces to a biased random walk in a billiard with a rough surface. The diffusion constant for this simplified model is calculated analytically.
Why Do Rural Firms Live Longer?
Creators: name: Yu, Li
name: Orazem, Peter F.
name: Jolly, Robert W.
name: Yu, Li
name: Orazem, Peter F.
name: Jolly, Robert W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Community/Rural/Urban Development
subject: Demand and Price Analysis
subject: Financial Economics
subject: Industrial Organization
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Productivity Analysis
subject: Risk and Uncertainty
subject: Rural
subject: urban
subject: entry
subject: exit
subject: survival
subject: sorting
subject: salvage value

description: Rural firms have a higher survival rate than urban firms. Over the first 13 years after firm entry, the hazard rate for firm exits is persistently higher for urban firms. While differences in firm attributes explain some of the rural-urban gap in firm survival, rural firms retain a survival advantage 18.5% greater than observationally equivalent urban firms. We argue that in competitive markets, the remaining survival advantage for rural firms must be attributable to unobserved factors that must be known at the time of entry. A plausible candidate for such a factor is thinner markets for the capital of failed rural firms. The implied lower salvage value of rural firms suggests that firms sorting into rural markets must have a higher probability of success in order to leave their expected profits equal to what they could earn in an urban market.
title: Concurrent emphysematous osteomyelitis and pyelonephritis: A rare, life-threatening condition
Creators: name: Canha Vedor Ferreira, Ana Sofia
Publisher: name: EURORAD
Year: 2025
Subjects: subject: Neuroradiology
subject: Neuroradiology spine
subject: CT
subject: MR
subject: Infection
subject: Clinical Case

description: Clinical History: A 56-year-old diabetic woman with irresectable low-grade serous carcinoma (undergoing induction chemotherapy) presented to the emergency department with two weeks of lower back pain radiating to both lower limbs. Symptoms of urinary retention and constipation emerged a week earlier when marked neutrophilic leukocytosis was identified during a routine oncology follow-up.

description: 56 years, female
Dynamics of an Interacting Barrow Holographic Dark Energy Model and its Thermodynamic Implications
Creators: name: Mamon, Abdulla Al
name: Paliathanasis, Andronikos
name: Saha, Subhajit
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, using Barrow entropy, we propose an interacting model of Barrow holographic dark energy (BHDE). In particular, we study the evolution of a spatially flat FLRW universe composed of pressureless dark matter and BHDE that interact with each other through a well-motivated interaction term. Considering the Hubble horizon as the IR cut-off, we then study the evolutionary history of important cosmological parameters, particularly, the density parameter, the equation of state parameter, and the deceleration parameter in the BHDE model and find satisfactory behaviors in the model. We perform a detailed study on the dynamics of the field equations by studying the asymptotic behavior of the field equations, while we write the analytic expression for the scale factor with the use of Laurent series. Finally, we study the implications of gravitational thermodynamics in the interacting BHDE model with the dynamical apparent horizon as the cosmological boundary. In particular, we study the viability of the generalized second law by assuming that the apparent horizon is endowed with Hawking temperature and Barrow entropy.
description: 12 pages, 5 figures, Accepted in The European Physical Journal Plus
Linearization problem on structurally finite entire functions
Creators: name: Okuyama, Yûsuke
Publisher: name: arXiv
Year: 2004
Subjects: subject: Complex Variables (math.CV)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37F50, 37F10, 30D20, 37F30

description: We show that if a 1-hyperbolic structurally finite entire function of type $(p,q)$, $p\ge 1$, is linearizable at an irrationally indifferent fixed point, then its multiplier satisfies the Brjuno condition. We also prove the generalized Mañé theorem; if an entire function has only finitely many critical points and asymptotic values, then for every such a non-expanding forward invariant set that is either a Cremer cycle or the boundary of a cycle of Siegel disks, there exists an asymptotic value or a recurrent critical point such that the derived set of its forward orbit contains this invariant set. From it, the concept of $n$-subhyperbolicity naturally arises.
description: 14pages, AMSLaTeX, to appear in Kodai Mathematical Journal
Agroindústria canavieira e desenvolvimento local: o caso da usina Usaciga no município de Cidade Gaúcha - PR
Creators: name: Shikida, Pery Francisco Assis
name: Souza, Elvanio Costa De
name: Dahmer, Vanessa De Souza
name: Shikida, Pery Francisco Assis
name: Souza, Elvanio Costa De
name: Dahmer, Vanessa De Souza
Publisher: name: Unknown
Year: 2008
Subjects: subject: Community/Rural/Urban Development
subject: Sugar cane agroindustry
subject: Local development
subject: Employment multiplier

description: The objective of this study was to estimate the basic employment and its multiplier effect on total employment in the of the Cidade Gaúcha municipality, emphasizing the contribution of Usaciga plant. According to the results, 1,739 people make up the basic employment of the municipality, while 1,176 people are part of the non-basic employment. The Usaciga is responsible for 39.7% of the basic employment of Cidade Gaúcha. The dynamics of population growth of Cidade Gaúcha has changed from the 1980, when the Usaciga started its activities. There was also positive evolution in terms of Human Development Index (HDI) in this municipality.
Experimental Realization of Nonadiabatic Holonomic Single-Qubit Quantum Gates\\ with Optimal Control in a Trapped Ion
Creators: name: Ai, Ming-Zhong
name: Li, Sai
name: Hou, Zhibo
name: He, Ran
name: Qian, Zhong-Hua
name: Xue, Zheng-Yuan
name: Cui, Jin-Ming
name: Huang, Yun-Feng
name: Li, Chuan-Feng
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum computation with quantum gates induced by geometric phases is regarded as a promising strategy in fault tolerant quantum computation, due to its robustness against operational noises. However, because of the parametric restriction of previous schemes, the main robust advantage of holonomic quantum gates is smeared. Here, we experimentally demonstrate a solution scheme, demonstrating nonadiabatic holonomic single qubit quantum gates with optimal control in a trapped Yb ion based on three level systems with resonant drives, which also hold the advantages of fast evolution and convenient implementation. Compared with corresponding previous geometric gates and conventional dynamic gates, the superiority of our scheme is that it is more robust against control amplitude errors, which is confirmed by the measured gate infidelity through both quantum process tomography and random benchmarking methods. In addition, we also outline that nontrivial two qubit holonomic gates can also be realized within current experimental technologies. Therefore, our experiment validates the feasibility for this robust and fast holonomic quantum computation strategy.
Stopping Start-Ups: How the Business Cycle Affects Entrepreneurship
Creators: name: Yu, Li
name: Orazem, Peter F.
name: Jolly, Robert W.
name: Yu, Li
name: Orazem, Peter F.
name: Jolly, Robert W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Community/Rural/Urban Development
subject: Demand and Price Analysis
subject: Financial Economics
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Political Economy
subject: Production Economics
subject: Productivity Analysis
subject: Public Economics
subject: Risk and Uncertainty

description: This study analyzes whether economic conditions at the time of labor market entry affect entrepreneurship, using difference in business start-ups between cohorts of college students graduating in boom or bust economic conditions. Those graduating during an economic bust tend to delay their business start-ups relative to boom period graduates by about two years. Those results are consistent with additional findings that higher unemployment rates at time of graduation significantly delay the first business start-up across all college graduation cohorts over the 1982-2004 period. The adverse effect of a bust is temporary, delaying but not preventing self-employment over the life-cycle.
pprocesses (1).pdf
Creators: name: Özgür, Aybars
Publisher: name: figshare
Year: 2020
Subjects: subject: 160609 Political Theory and Political Philosophy
subject: FOS: Political science
subject: 160699 Political Science not elsewhere classified

description: A study conducted on different types of interest groups' activities and their impact on policy processes in the United States
Mislocalizations of touch to the locus of a fake hand
Creators: name: Austen, Erin Leigh
Publisher: name: University of British Columbia
Year: 2009

description: Space-relevant tactile localizations may be influenced by non-tactile sources of information. This is evident in the fake hand effect wherein observers mislocalize tactile targets delivered to their unseen hand towards a visible fake hand that is positioned next to a pair of distractor lights. The aim of the present study was to use the fake hand effect to explore the factors that influence tactile localizations. First, the effect was quantified by comparing tactile localizations in the presence of the fake hand to those when the observer's hand instead occupied the normal fake hand location. The effect was quantitatively weaker than one would expect if the tactile targets were mislocalized to the locus of the fake hand (Experiment 1). Surprisingly, the fake hand effect did not depend on direct vision of the fake hand (Experiments 1 & 2), nor was it enhanced by tactile information that was congruent with the fake hand (Experiment 3). The effect, however, was sensitive to the consistency between the orientation of the fake hand and the observer's hand such that it disappeared when the two were inconsistent (Experiment 4). It was also sensitive to the mapping between the location of the digit stimulated and the type of foot response required (Experiment 5). These results have important implications for the flexibility of one's body schema.
DEVELOPMENT OF A MODEL FOR ENSURING FOOD SECURITY AT THE LEVEL OF A SYSTEMATIC APPROACH TO INPUT AND OUTPUT PARAMETERS
Creators: name: Adbikerimova, G.
name: Kulanova, D.
name: Seidakhmetov, M.
name: Zhambayev, Y.
Publisher: name: The Scientific Heritage
Year: 2021
Subjects: food security
systemic factors
individual consumer barriers
model formation
efficiency.

description: The food component of the economic security of the state involves the economic provision of the necessary amount of food and raw materials. The provision of food and raw materials is one of the most important components of the economic security of the state, and in many countries of the world there are laws defining minimum standards of food security. Economic and food security is becoming particularly relevant from the point of view of the current financial crisis, the implementation of foreign sanctions, and the conditions for the deterioration of the economic situation. The purpose of the research is to develop the theoretical and methodological foundations of food security of the state and to develop practical recommendations for ensuring food security of Kazakhstan in modern conditions, based on its integral assessment, factor analysis. The scientific article, based on a comprehensive assessment of current trends in the development of food security, offers practical recommendations for improving the level of food security in Kazakhstan, as a condition for ensuring food security of the state and a model for ensuring food security in Kazakhstan.. The Committee of Science of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. fund this study AP09261075 Formation of the model of the regional food hub as a horizontally integrated structure for ensuring food security (on the example of the meat cluster of Turkestan region) for 2021-2023.
A value chain and cluster perspective on competitiveness of European fresh vegetable production – Case studies from Germany, Italy, and Spain
Creators: name: Riedel, Bettina
name: Riedel, Bettina
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Institutional and Behavioral Economics
subject: Marketing
subject: FOS: Economics and business
subject: Fresh vegetables
subject: value chains
subject: clusters
subject: competitiveness

description: In the present study we combine cluster theory with a value chain approach, with the aim of discovering elements of the European fresh vegetable business that could enable local producers to gain competitive advantages in a global market. European producers of fresh vegetables are under pressure to improve their performance and increase their competitiveness. Competitive advantage can be gained through innovation and by using unique resources stemming from cooperation between producers and complementary actors in local clusters. However, locally clustered producers do not sell to open markets but need access to value chains governed by lead firms, the large European retail chains, which set the rules and conditions of participation. The study presents first results from a multiple case-study analysis involving three different European regions in Germany, Italy and Spain specialized in fresh vegetable production. In-depth interviews with practitioners allowed us to confirm some main trends in business organization in the European fresh vegetable industry, but also to point out some interesting peculiarities of this industry. Local fresh vegetable producers become competitive due to their integration both in local production and wider marketing networks, where unique knowledge is created and interchanged by personal relationships. Further concentration on the local level is claimed to countervail power imbalances that usually favor buyers. The need for leading supermarket chains to build up direct relationships with key suppliers disturbs the functioning of existing relationship patterns in the local cluster. Creation of exclusive relationships with retail chains is pursued by entrepreneurs of innovative producing farms who treat their special knowledge and capacities as competitive advantages in the sharp competition in world markets and do not share it with other cluster actors.
S2-S3 from Computational analysis of hygromorphic self-shaping wood gridshell structures
Creators: name: Grönquist, Philippe
name: Prijanthy Panchadcharam
name: Wood, Dylan
name: Menges, Achim
name: Rüggeberg, Markus
name: Wittel, Falk K.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Mechanics
subject: 90599 Civil Engineering not elsewhere classified
subject: FOS: Civil engineering
subject: 30399 Macromolecular and Materials Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Document: Figures S2 and S3
The Origin of Cosmic Rays - A 96-Year-Old Puzzle Solved?
Creators: name: Dar, Arnon
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There is mounting evidence that long duration gamma ray bursts (GRBs) are produced by ultra-relativistic jets of ordinary matter which are ejected in core collapse supernova (SN) explosions. Such jets are extremely efficient cosmic ray (CR) accelerators which can accelerate the swept up ambient particles on their way to the highest observed CR energies. The bulk of the jet kinetic energy is used to accelerate CRs while only a tiny fraction is used to produce the GRB and its afterglow. Here we use the remarkably successful cannonball (CB) model of GRBs to show that the bipolar jets from SN explosions, which produce GRBs most of which are not beamed towards Earth, can be the main origin of cosmic rays at all energies. The model explains very simply the elemental composition of CRs and their observed spectra at all energies. In particular it explains the origin of the CR knees and ankle. Above the CR ankle, the Galactic magnetic fields can no longer delay the free escape of ultra-high energies CRs (UHECR) from the Galaxy, and the CRs from the intergalactic medium (IGM), which were injected there by SN jets from all the galaxies and isotropized there by the IGM magnetic fields, dominate the Galactic CR spectrum. A Greisen-Zatsepin-Kuzmin (GZK) effect due to the interaction of UHECRs with the microwave background radiation is expected. The CR nuclei which diffuse out of galaxies, or are directly deposited in the IGM by the relativistic SN jets, may be the origin of the IGM magnetic fields. Inverse Compton scattering of the cosmic microwave background radiation (MBR) by the CR electrons in the IGM produces the diffuse extragalactic gamma-ray background radiation (GBR).
description: Invited talks to be published in the proceedings of the 2004 La Thuile Workshop on Perspectives In High energy Physics, La Thuile, Aosta Valley, Italy, February 29-March 6, 2004 and of the 2004 Vulcano Workshop on Frontier Objects in Particle Physics and Astro Physics, Vulcano, Italy, May 24-29, 2004
Moiré versus Mott: Incommensuration and Interaction in One-Dimensional Bichromatic Lattices
Creators: name: Vu, DinhDuy
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Inspired by the rich physics of twisted 2D bilayer moiré systems, we study Coulomb interacting systems subjected to two overlapping finite 1D lattice potentials of unequal periods through exact numerical diagonalization. Unmatching underlying lattice periods lead to a 1D bichromatic `moiré' superlattice with a large unit cell and consequently a strongly flattened band, exponentially enhancing the effective dimensionless electron-electron interaction strength and manifesting clear signatures of enhanced Mott gaps at discrete fillings. An important non-perturbative finding is a remarkable fine-tuning effect of the precise lattice commensuration, where slight variations in the relative lattice periods may lead to a suppression of the correlated insulating phase, in qualitative agreement with the observed fragility of the correlated insulating phase in twisted bilayer graphene. Our predictions, which should be directly verifiable in bichromatic optical lattices, establish that the competition between interaction and incommensuration is a key element of the physics of moiré superlattices.
description: 7 pages, 9 figures
Anti-de Sitter 3-dimensional Gravity with Torsion
Creators: name: Blagojevic, M.
name: Vasilic, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the canonical formalism, we study the asymptotic symmetries of the topological 3-dimensional gravity with torsion. In the anti-de Sitter sector, the symmetries are realized by two independent Virasoro algebras with classical central charges. In the simple case of the teleparallel vacuum geometry, the central charges are equal to each other and have the same value as in general relativity, while in the general Riemann-Cartan geometry, they become different.
description: Latex, 13 pages, no figures
A Remark on Lorentz Violation at Finite Temperature
Creators: name: Brito, F. A.
name: Mariz, T.
name: Nascimento, J. R.
name: Passos, E.
name: Ribeiro, R. F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the radiatively induced Chern-Simons-like term in four-dimensional field theory at finite temperature. The Chern-Simons-like term is temperature dependent and breaks the Lorentz and CPT symmetries. We find that this term remains undetermined although it can be found unambiguously in different regularization schemes at finite temperature.
description: To appear in JHEP, 8 pages, 1 eps figure, minor changes and references added
Efeitos redistributivos de transferência de renda e redução tributária nos setores agropecuário e agroindustrial
Creators: name: Santos, Vladimir Faria Dos
name: Vieira, Wilson Da Cruz
name: Reis, Bricio Dos Santos
name: Santos, Vladimir Faria Dos
name: Vieira, Wilson Da Cruz
name: Reis, Bricio Dos Santos
Publisher: name: Unknown
Year: 2007
Subjects: subject: Political Economy
subject: Income distribution
subject: Taxation
subject: General equilibrium
subject: Brazil

description: This work analyzes the effects of alternative policies on income redistribution in the Brazilian economy. It was used an applied general equilibrium model and the following simulations were implemented: direct income transfer and tax reduction on agriculture and agro-industry sectors. The results indicated that direct income transfer is a better policy to reduce income inequality than tax reduction on specific sectors such as agriculture and agro-industry.
Unsupervised Multi-label Dataset Generation from Web Data
Creators: name: Roig, Carlos
name: Varas, David
name: Masuda, Issey
name: Riveiro, Juan Carlos
name: Bou-Balust, Elisenda
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper presents a system towards the generation of multi-label datasets from web data in an unsupervised manner. To achieve this objective, this work comprises two main contributions, namely: a) the generation of a low-noise unsupervised single-label dataset from web-data, and b) the augmentation of labels in such dataset (from single label to multi label). The generation of a single-label dataset uses an unsupervised noise reduction phase (clustering and selection of clusters using anchors) obtaining a 85% of correctly labeled images. An unsupervised label augmentation process is then performed to assign new labels to the images in the dataset using the class activation maps and the uncertainty associated with each class. This process is applied to the dataset generated in this paper and a public dataset (Places365) achieving a 9.5% and 27% of extra labels in each dataset respectively, therefore demonstrating that the presented system can robustly enrich the initial dataset.
description: The 3rd Workshop on Visual Understanding by Learning from Web Data 2019
title: [Carte postale de Francis Even à Cécile Thépot]
title: [Carte postale de Francis Even à Cécile Thépot]
Creators: name: Even, Francis (1877-1959)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2024

description: Échanges avec son épouse.
description: Provenance: Ce document provient du fonds Yves Berthou (YBE) conservé au Centre de recherche bretonne et celtique. Le fonds Yves Berthou a été extrait du fonds Francis Even (FEV) par Yves Le Gallo, à l’acquisition de ce dernier fonds par la bibliothèque du CRBC en 1969.
description: 0001.jpg
description: 0002.jpg
Spoon or slide? The non-linear matter power spectrum in the presence of massive neutrinos
Creators: name: Hannestad, Steen
name: Upadhye, Amol
name: Wong, Yvonne Y. Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Numerical simulations of massive neutrino cosmologies consistently find a spoon-like feature in the non-linear matter power spectrum ratios of cosmological models that differ only in the neutrino mass fraction f_N. Typically, the ratio approaches unity at low wave numbers k, decreases by ~ 10 f_N at k ~ 1 h/Mpc, and turns up again at large k. Using the halo model of large-scale structure, we show that this spoon feature originates in the transition from the two-halo power spectrum to the one-halo power spectrum. The former's sensitivity to f_N rises with k, while that of the latter decreases with k. The presence of this spoon feature is robust with respect to different choices of the halo mass function and the halo density profile, and does not require any parameter tuning within the halo model. We demonstrate that a standard halo model calculation is already able to predict the depth, width, and position of this spoon as well as its evolution with redshift z with remarkable accuracy. Predictions at z >= 1 can be further improved using non-linear perturbative inputs.
description: 24 pages, 9 figures (matches accepted version)
A local energy estimate for wave equations on metrics asymptotically close to Kerr
Creators: name: Lindblad, Hans
name: Tohaneanu, Mihai
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L05 (Primary) 35L72, 83C05 (Secondary)

description: In this article we prove a local energy estimate for the linear wave equation on metrics with slow decay to a Kerr metric with small angular momentum. As an application, we study the quasilinear wave equation $\Box_{g(u, t, x)} u = 0$ where the metric $g(u, t, x)$ is close (and asymptotically equal)to a Kerr metric with small angular momentum $g(0,t,x)$. Under suitable assumptions on the metric coefficients, and assuming that the initial data for $u$ is small enough, we prove global existence and decay of the solution $u$.
description: 46 pages
Comércio e integração dos estados brasileiros
Creators: name: Almeida, Fernanda Maria De
name: Silva, Orlando Monteiro Da
name: Almeida, Fernanda Maria De
name: Silva, Orlando Monteiro Da
Publisher: name: Unknown
Year: 2007
Subjects: subject: International Relations/Trade
subject: International trade
subject: Border effect
subject: Gravity model

description: Given that in Brazil there is a significant asymmetry in production and trade among states, this study had as objective to measure the border effect to the intranational and international trade, using it as an indicator of the degree of integration. Such effect measures the bias to the internal trade of a country or state, in comparison to the external trade. A gravity model, including different dummy variables was used as methodology for this study. Results showed that intra-state trade in Brazil was 32 and 96 times larger than interstate and international trade, respectively. Interstate trade, was shown to be around 34 times larger than international trade. The border effect calculated to each state trading to other states, and to the rest of the world, showed smaller values and larger commercial integration among the states of the southeast and south regions of Brazil.