cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Use of Inserts of Tool Steel with Solid Lubricant Aggregated made by Powder Metallurgy
Creators: name: Bueno, Alex Fabiano
name: Cóser, Marcelo Salvador
name: Souza, José De
name: Schaeffer, Lirio
Publisher: name: figshare
Year: 2020
Subjects: subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: This paper describes the making of insert of tool steel AISI H13 through the powder metallurgy process with the addition of solid lubricant in its composition. The experiment was done using molybdenum disulfide (MoS2) to reduce the coefficient of friction of the insert. The lubricant added caused reduction in friction of the insert/piece system. Powder of solid lubricant was added to tool steel powder during the mixing step at concentrations ranging from 1 to 5%, and specimens were prepared for evaluation. The sample with 3% solid lubricant MoS2was selected for development of the reported analyzes of low friction tribological systems when compared with systems obtained with tool steel manufactured by the conventional lamination.
Classical dynamics near the triple collision in a three-body Coulomb problem
Creators: name: Choi, Nark Nyul
name: Lee, Min-Ho
name: Tanner, Gregor
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We investigate the classical motion of three charged particles with both attractive and repulsive interaction.The triple collision is a main source of chaos in such three body Coulomb problems.By employing the McGehee scaling technique, we analyse here for the first time in detail the three-body dynamics near the triple collision in 3 degrees of freedom.We reveal surprisingly simple dynamical patterns in large parts of the chaotic phase space. The underlying degree of order in the form of approximate Markov partitions may help in understanding the global structures observed in quantum spectra of two-electron atoms.
description: 4 pages, 3 figures
Analyzing Drivers of Food Crop Productivity in Nigeria
Creators: name: Oni, Omobowale A.
name: Nkonya, Ephraim M.
name: Pender, John L.
name: Phillip, Dayo
name: Kato, Edward
name: Oni, Omobowale A.
name: Nkonya, Ephraim M.
name: Pender, John L.
name: Phillip, Dayo
name: Kato, Edward
Publisher: name: Unknown
Year: 2009
Subjects: subject: Crop Production/Industries
subject: Food Security and Poverty
subject: Production Economics
subject: Productivity Analysis
subject: Drivers
subject: Agriculture
subject: Productivity
subject: farmers
subject: Nigeria

description: Enhanced agricultural productivity is the key issue being presently discussed by agricultural stakeholders as being imperative to the attainment of food security, reducing the present high rate of unemployment and the diversification of Nigeria’s economy from being oil dependent. This study therefore attempts to isolate factors that drive agricultural crop productivity in Nigeria. The study made use of panel data from 36 states and Federal Capital territory between 1995 and 2006. Livestock, Fisheries and forestry data were not readily available and therefore not analyzed in this report. The econometric model used in this paper is a panel data model that takes into consideration OLS random and fixed effects as well as GLS with fixed state effect models. The results indicate that increase in agricultural crop production in Nigeria is based on land expansion. The share of the female labour is positively associated with productivity suggesting higher productivity of the female labour. The results confirm the important role that female farmers play in food production and ensuring food security. Fertilizer use was positively associated with productivity but the association was not significant. The non-significant impact of fertilizer on crop productivity might be due to inadequate use of fertilizer, while the positive association is an indication that it is a yield enhancing technology.The results of the models with year dummies show that crop area has a slightly negative and significant association with value of production. The finding of this paper makes it imperative to suggest the need for adoption of technologies that will bring about productivity gains in crop production through less of land expansion practices. It is also recommended that farmers’ capacity in terms of right quantity use of fertilizer should be enhanced, while female farmers’ participation in crop production should be encouraged.
Toward the preparation of a directed library of amatoxins containing modified prolines
Creators: name: Pellicelli, Jonathan
Publisher: name: University of British Columbia
Year: 2010

description: Amatoxins are bicyclic peptides found in the Amanita mushroom species; these molecules are specific inhibitors of RNA polymerase II. Crystal structure data for the amatoxin-RNA polymerase II complex suggest that the hydrogen bond between Pol II Glu882 and amatoxin hydroxyproline is the key interaction in the binding of amatoxins to Pol II. We decided to synthesize a small library of amatoxins that will investigate this suspected key interaction. The amatoxins in this library contain modified prolines which represent analogue of hydroxyproline. The formation of the library was achieved in three synthetic phases. The first phase of the project was the synthesis of the various proline derivatives chosen to be incorporated into amatoxin peptides. These prolines were fluoroproline, difluoroproline, trifluoromethylproline, cyanoproline, benzylthioproline, azidoproline, hydroxyproline, ketoproline, and thiazolidine acid. The second phase of the project was the synthesis of 3a-hydroxyhexahydropyrroloindoles (Hpi). This molecule is essential for the formation of the tryptathionine bridge (a key feature in the amatoxin molecule) via a Savige-Fontana reaction. The last phase of the project was the formation of linear octapeptides and their subsequent cyc1ization. Seven linear octapeptides and two monocyc1ic octapeptides were prepared.
COVID-19 and Guillain-Barre Syndrome: A systematic review of case reports
Creators: name: Larco, Rodrigo Carrillo
Publisher: name: figshare
Year: 2020
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: Supplementary material for the work "COVID-19 and Guillain-Barre Syndrome: A systematic review of case reports"
SumoPred-PLM: human SUMOylation and SUMO2/3 sites Prediction using Pre-trained Protein Language Model
Creators: name: Pakhrin, Subash
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310205
subject: Proteomics and metabolomics
classificationCode: 310208
subject: Translational and applied bioinformatics
classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 310206
subject: Sequence analysis

description: SUMOylation is an essential post-translational modification system with the ability to regulate nearly all aspects of cellular physiology. Three major paralogues SUMO1, SUMO2, and SUMO3 form a covalent bond between the small ubiquitin-like modifier with lysine residues at consensus sites in protein substrates. Biochemical studies continue to identify unique biological functions for protein targets conjugated to SUMO1 versus the highly homologous SUMO2 and SUMO3 paralogues. Yet, the field has failed to harness contemporary AI approaches including pre-trained protein language models to fully expand and/or recognize the SUMOylated proteome. Herein, we present a novel, deep learning-based approach called SumoPred-PLM for human SUMOylation prediction with sensitivity, specificity, Matthew’s correlation coefficient, and accuracy of 74.64%, 73.36%, 0.48, and 74.00%, respectively, on the CPLM 4.0 independent test dataset. In addition, this novel platform uses contextualized embeddings obtained from a pre-trained protein language model, ProtT5-XL-UniRef50 to identify SUMO2/3-specific conjugation sites. The results demonstrate that SumoPred-PLM is a powerful and unique computational tool to predict SUMOylation sites in proteins and accelerate discovery.
Explaining Rice Price Shocks in Nigeria: Implications for Policy Intervention
Creators: name: Awoyemi, Taiwo Timothy
name: Awoyemi, Taiwo Timothy
Publisher: name: Unknown
Year: 2009
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Production Economics
subject: Rice
subject: price shocks
subject: Coefficient of variation
subject: GARCH
subject: Policy intervention.

description: At the microeconomic level, in predominantly agrarian society of Nigeria where majority of the farmers are poor and unable to obtain insurance, price and production shocks would have adverse impact on growth and development. Particularly, there is a growing concern that current levels of rice production will not meet future demand. The general objective of the paper is to examine the key factors influencing rice price variability, and how to address these effects in policy terms. Time series data of price which cover the period of 1990-2004 from the National Bureau of Statistics were used. Coefficient of variation was used in the analysis of variability. The time varying conditional variances were estimated by using a Generalized Autoregressive Conditional Heteroscedasticity model. Coefficient of variation (CV) for rice was calculated as 40.92 %. This value shows that the price of rice fluctuates at important level in the period of 1990-2004. There were price shocks because both the supply of and demand for rice vary widely over time in addition to the effect of some variables, which are not under control of both producers and suppliers. Gross income equals to the value that yield of a product is multiplied by its price. Therefore, a fluctuation in either yield or price affects gross income of farmers. A GARCH based measure indicates considerable time variability. The study suggests policy measures to support research, provide storage and processing technologies.
The Exploration of the Unknown
Creators: name: Wilkinson, P. N.
name: Kellermann, K. I.
name: Ekers, R. D.
name: Cordes, J. M.
name: Lazio, T. Joseph W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Square Kilometre Array is conceived as a telescope which will both test fundamental physical laws and transform our current picture of the Universe. However, the scientific challenges outlined in this book are today's problems--will they still be the outstanding problems that will confront astronomers in the period 2020 to 2050 and beyond, when the SKA will be in its most productive years? If history is any example, the excitement of the SKA will not be in the old questions which are answered, but the new questions that will be raised by the new types of observations it will permit. The SKA is a tool for as-yet-unborn users and there is an onus on its designers to allow for the exploration of the unknown. We outline a philosophy for the design and operation of the SKA that can lead the radio astronomers in the 21st century to add to the many discoveries of new phenomena made by radio astronomers in the 20th century.
description: 14 pages, 2 figures in 2 PostScript files; to appear in "Science with the Square Kilometer Array," eds. C. Carilli and S. Rawlings, New Astronomy Reviews (Elsevier: Amsterdam); Figure 1 corrected (again) so that it may print
Dominant in-plane symmetric elastoresistance in CsFe2As2
Creators: name: Wiecki, P.
name: Haghighirad, A. -A.
name: Weber, F.
name: Merz, M.
name: Heid, R.
name: Böhmer, A. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the elastoresistance of the highly correlated material CsFe2As2 in all symmetry channels. Neutralizing its thermal expansion by means of a piezoelectric-based strain cell is demonstrated to be essential. The elastoresistance response in the in-plane symmetric channel is found to be large, while the response in the symmetry-breaking channels is weaker and provides no evidence for a divergent nematic susceptibility. Rather, our results can be interpreted naturally within the framework of a coherence-incoherence crossover, where the low-temperature coherent state is sensitively tuned by the in-plane atomic distances.
Post Harvest Grain Management Storage Techniques and Pesticides Use by Farmers in South-West Nigeria
Creators: name: Okoruwa, Victor O.
name: Ojo, O.A.
name: Akintola, C.M.
name: Ologhobo, A.D.
name: Ewete, F.K.
name: Okoruwa, Victor O.
name: Ojo, O.A.
name: Akintola, C.M.
name: Ologhobo, A.D.
name: Ewete, F.K.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Food Security and Poverty
subject: Post harvest
subject: Storage techniques
subject: Pesticides
subject: South-west Nigeria.

description: Post harvest facilities or appropriate storage technology has been the major problem of Nigerian agriculture for a long time that has resulted in considerable waste of agricultural output and hence considerable loss to the economy. This study therefore examines the post harvest choices of grain storage techniques and pesticides use by farmers in south-west Nigeria. Multistage sampling technique was used to draw a sample of 192 farmers from whom necessary information where elicited, while Multinomial logit model was used in analysing the data. The results revealed quantity of grain stored, education, gender of farmer, capital invested and price of grains, as factors that affect farmers’ choice of storage techniques. Also choice of pesticide used by farmers was influenced by quantity of grains harvested, cost of pesticide and cost of investment. The need to educate farmers on the use of pesticides in order to avoid problems of grain contamination and assist farmers’ to access loans and credit facilities becomes inevitable.
Evaluation of the use of Ethylene-Vinyl Acetate E.V.A. Waste in Reinforced Gypsum Plaster Walls
Creators: name: Martins, Natália De Oliveira
name: Araujo, Pietra Fritsch De
name: Böes, Patrícia Francini
name: Souza, José De
name: Ávila, Tatiana Louise
Publisher: name: figshare
Year: 2020
Subjects: subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: This paper presents an evaluation for the reuse of ethylene-vinyl acetate E.V.A. discarded by the footwear industry. With the objective of obtaining an alternative to reduce the environmental impact generated by remains of the material and reduce the accumulation in landfills. The study presents an evaluation of the possibility of using the E.V.A. as a composite in reinforced gypsum plaster walls. Different proportions of E.V.A. mixed with gypsum were used. The tests of hardness, compression, flexure, impact, water absorption, setting times, particle size distribution and ignitability were performed. In addition, the composite structure was evaluated through the Scanning Electron Microscope (SEM). The results demonstrate the feasibility of using the composite.
The use of ICT in Mazovian agriculture
Creators: name: Czapiewski, Konrad
name: Kulikowski, Roman
name: Banski, Jerzy
name: Bednarek-Szczepańska, Maria
name: Mazur, Marcin
name: Ferenc, Mariola
name: Konopski, Michał
name: Czapiewski, Konrad
name: Kulikowski, Roman
name: Banski, Jerzy
name: Bednarek-Szczepańska, Maria
name: Mazur, Marcin
name: Ferenc, Mariola
name: Konopski, Michał
Publisher: name: Unknown
Year: 2013
Subjects: subject: International Development
subject: Research and Development/Tech Change/Emerging Technologies
subject: Teaching/Communication/Extension/Profession
subject: Internet
subject: rural areas
subject: agriculture
subject: Mazovia
subject: Poland

description: The main objective of this paper is the diagnosis and evaluation of ICT use in farming. The area of research presented in the study covers the region of Mazovia, which represents different types of rural areas and diverse forms of agriculture. Mazovia region is characterised, on the one hand, by the highest value of GDP per capita indicator in Poland and, on the other, the biggest internal differentiation. In our analyses, a variety of research methods were used as well as data sources - both commonly available (secondary source), as well as data from own studies. For detailed identification of farm equipment level in ICT and its use by farmers, primary research was conducted among farmers and local authorities in 20 deliberately selected municipalities. In each municipality, individual in-depth interviews were conducted with representatives of local government. The second research method was a survey aimed to be completed by individual farmers – almost 1300 were completely filled by farmers. Own research carried out among farmers in Mazovia showed that nowadays infrastructural determinants still remain the crucial problem in access to the Internet – a significant majority of farmers does not have the possibility of choosing the Internet services provider or is forced to use the forms of access that do not ensure a stable connection and high-speed data transmission. Most farmers use a computer and the Internet, if the household is equipped in them. However, there are used primarily in a passive way - mainly to obtain information. Active forms of computer and Internet use, requiring user interaction, are much less common. Education is a very strong factor in differentiating the level of ICT use by farmers - poorly educated farmers are less able to acquire information from the Internet, while the transfer of knowledge with the use of ICT to best educated farmers is facilitated. Other characteristics of the economic situation of farms, the dominant production profile, size and location do not differentiate the levels of computer and Internet use by farmers as clearly as education, although these factors are important regulators of the frequency of Internet use for strictly occupational purposes.
Persuasion dynamics
Creators: name: Weisbuch, Gerard
name: Deffuant, Guillaume
name: Amblard, Frederic
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We here discuss a model of continuous opinion dynamics in which agents adjust continuous opinions as a result of random binary encounters whenever their difference in opinion is below a given threshold. We concentrate on the version of the model in the presence of few extremists which might drive the dynamics to generalised extremism. The intricate regime diagram is explained by a combination of meso-scale features involving the first interaction steps
description: 8 Oct 2004, soumis a Physica A
Ice nucleating properties of soot, Kaolinite, & Goethite at conditions relevant for the lower troposphere
Creators: name: Dymarska, Magdalena
Publisher: name: University of British Columbia
Year: 2010

description: Although soot and mineral dust are both ubiquitous in the Earth's atmosphere, their contribution to the formation of the ice phase in lower tropospheric clouds remains poorly understood. This thesis investigates the ice nucleating properties of a range of soot and mineral dust species in the deposition mode - below liquid water saturation - and at temperatures ranging from 239 to 258 K. It is found that under these experimental conditions soot exhibits no ice nucleating abilities whereas Kaolinite and Goethite are found to be effective ice nuclei. In experiments involving soot, ice nucleation was only observed at ~ 243 K on a few occasions. However, even at these temperatures the relative humidity with respect to ice (RH[sub i]) was close to water saturation when ice nucleation was observed, suggesting water nucleation may have occurred first followed by ice nucleation during the condensation process. The ice nucleating abilities of soot exposed to atmospherically-relevant quantities of ozone were also investigated. Even after an exposure equivalent to 80 ppb O3 at atmospheric pressure for 13.7 days, soot exhibited poor ice nucleating abilities. In the case of Kaolinite and Goethite, ice particles consistently formed below ~ 252 K and at RH[sub i] well below water supersaturation, suggesting deposition nucleation is the dominant mode of ice formation under these experimental conditions. The ice nucleating abilities of soot and mineral dust were quantified by determining the heterogeneous nucleation rate coefficient, J[sub het]; heterogeneous nucleation theory was employed to determine the contact angle for formation of an ice germ on the surface of soot, Kaolinite, and Goethite. The experimentally-determined J[sub het] was used to estimate the number density of ice particles that might form under given conditions of temperature, RH[sub i], and particle number density for soot and mineral dust in the atmosphere. Whereas soot alone cannot account for the number density of ice nuclei observed in field studies, these measurements show Kaolinite and Goethite may significantly contribution to the formation of the ice phase in lower tropospheric clouds. This is consistent with recent field measurements and some recent laboratory data.
Hamiltonian for scalar field model of infinite derivative gravity
Creators: name: Kolar, Ivan
name: Mazumdar, Anupam
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Theories with an infinite number of derivatives are described by non-local Lagrangians for which the standard Hamiltonian formalism cannot be applied. Hamiltonians of special types of non-local theories can be constructed by means of the (1+1)-dimensional Hamiltonian formalism. In this paper, we consider a simple scalar field model inspired by the infinite derivative gravity and study its reduced phase space by using this formalism. Assuming the expansion of the solutions in the coupling constant, we compute the perturbative Hamiltonian and the symplectic 2-form. We also discuss an example of a theory leading to an infinite-dimensional reduced phase space for a different choice of the form factor.
description: 13 pages
Magnetization reversal of ferromagnetic nanodisc placed above a superconductor
Creators: name: Fraerman, A. A.
name: Karetnikova, I. R.
name: Nefedov, I. M.
name: Shereshevskii, I. A.
name: Silaev, M. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using numerical simulation we have studied a magnetization distribution and a process of magnetization reversal in nanoscale magnets placed above a superconductor plane. In order to consider an influence of superconductor on magnetization distribution in the nanomagnet we have used London approximation. We have found that for usual values of London penetration depth the ground state magnetization is mostly unchanged. But at the same time the fields of vortex nucleation and annihilation change significantly: the interval where vortex is stable enlarges on 100-200 Oe for the particle above the superconductor. Such fields are experimentally observable so there is a possibility of some practical applications of this effect.
description: 8 pages, 9 figures
title: Investigating the use of first-principles calculations for NMR studies of disorder in the solid state
Creators: name: Moran, Robert
Publisher: name: University of St Andrews
Year: 2019

description: In this thesis, the use of first-principles calculations to assist solid-state NMR spectroscopic studies of disordered inorganic materials has been investigated, with emphasis placed on understanding the most relevant and efficient methods for computationally modelling a system. The first class of materials studied are oxide ceramics, more specifically Y₂SnₓTi₂₋ₓO₇, La₂SnₓZr₂₋ₓO₇, Y₂Zr₂O₇ and Y₂Hf₂O₇; the first two of which are pyrochlore solid solutions, while the latter adopt the disordered defect fluorite phase. Both pyrochlore systems exhibit configurational disorder in the form of B-site cation mixing, which leads to the overlapping and complex experimental solid-state NMR spectra being challenging to assign. By considering several methods to generate structural models computationally, the site occupancy disorder (SOD) method was found to be particularly well suited to producing a set of structural models capable of representing the configurational disorder in these materials with the predicted ⁸⁹Y, ¹¹⁹Sn and ¹⁷O NMR parameters able to assist the assignment of the experimental NMR spectra and provide significant structural insight. Investigation into Y₂Zr₂O₇ and Y₂Hf₂O₇ defect fluorites proved considerably more challenging, with the high level of structural disorder preventing easy implementation of SOD-based approaches, and necessitating a less sophisticated and more manual modelling approach being employed. Although some understanding of the origin of the signals seen in the NMR spectra was able to be obtained in this way, the limited scope of this computational investigation prevents a more detailed and quantitative analysis. The second class of materials investigated in this thesis are hydrous silicate minerals found in the inner-Earth, specifically, hydrous Fe-free wadsleyite (β-Mg₂SiO₄), a system that is challenging to study experimentally due to the positional disorder of the incorporated protons (and of the charge-balancing associated cation vacancies). In combination with experimental solid-state NMR spectra and the first-principles calculation of NMR parameters, the ab initio random structure searching (AIRSS) approach was used to probe the structure of hydrous wadsleyite, by identifying many possible protonation arrangements for semi- and fully-hydrous wadsleyite. Through this investigation, enthalpically stable protonation arrangements were identified for both semi- and fully-hydrous wadsleyite, with predicted NMR parameters for the AIRSS-generated structures used to assist assignment of the solid-state NMR spectra of a sample of wadsleyite containing ~3 wt% H₂O. By using the experimental NMR spectra to validate the accuracy and relevance of AIRSS-generated structural models, a new structural picture of the disorder in fully-hydrous wadsleyite was proposed, highlighting the success with which first-principles calculations can be used to assist the assignment of the solid-state NMR spectra of disordered inorganic materials.
Analysis of Metallic Waste from Laser Cutting for Utilization in Parts Manufactured by Conventional Powder Metallurgy
Creators: name: Souza, José De
name: Motta, Clayton André Oliveira Da
name: Machado, Tiago Gonçalves
name: Giacomin, Alexandre
name: Hamudy Munir Abou Arabi
Publisher: name: figshare
Year: 2020
Subjects: subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: This study aims to evaluate the utilization of the waste coming from the laser cutting process for use in the manufacture of metal parts. The Powder Metallurgy Process was chosen as agent for this purpose. In this development was considered the state of supply of residues, which are particles of metallic material that has been cut by the laser process. To evaluate the residue behavior, chemical analysis of the material were performed, as well characterization by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). Analyzes showed that the base metal constituent in residue is iron, being observed also the presence of carbon and oxygen. The metal residues can be used as raw material in generating parts by the conventional powder metallurgy process. This is due to the fact the base metal present temperatures necessary for the formation of "sintering necks" within the values practiced by the ovens regularly traded.
Detection of sub-shot-noise spatial correlation in high-gain parametric down-conversion
Creators: name: Jedrkiewicz, O.
name: Jiang, Y. -K.
name: Brambilla, E.
name: Gatti, A.
name: Bache, M.
name: Lugiato, L. A.
name: di Trapani, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using a 1GW-1ps pump laser pulse in high gain parametric down-conversion allows us to detect sub-shot-noise spatial quantum correlation with up to one hundred photoelectrons per mode, by means of a high efficiency CCD. The statistics is performed in single-shot over independent spatial replica of the system. The paper highlights the evidence of quantum correlation between symmetrical signal and idler spatial areas in the far field, in the high gain regime. In accordance with the predictions of numerical calculations the observed transition from the quantum to the classical regime is interpreted as a consequence of the narrowing of the down-converted beams in the very high gain regime.
description: 4,2 pages, 4 figures
Symmetry Exploitation in Orbit Feedback Systems of Synchrotron Storage Rings
Creators: name: Kempf, Idris
name: Goulart, Paul J.
name: Duncan, Stephen R.
name: Rehm, Guenther
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Structural symmetries in the storage ring of synchrotrons are intentionally created during the design phase of the magnetic lattices, but they are not considered in the design of control algorithms that stabilize the beam of accelerated particles. The choice of control algorithm, however, is limited by the speed requirements of the synchrotron. Standard control algorithms for synchrotrons are based on a singular value decomposition (SVD) of the orbit response matrix. SVD controllers neither exploit the structural symmetries nor exhibit any speed advantages. Based on the periodicity and the reflection properties of the betatron function, we show that these structural symmetries are inherited by the orbit response matrix. We show that the resulting block-circulant and centrosymmetric properties of the matrix can be used for different computationally efficient decompositions of the controller. We also address the case of broken symmetry due to odd placements of magnets and monitors. Our efficient decomposition could enable the use of more advanced control techniques for synchrotrons, such as control algorithms that require real-time optimization. These advanced control techniques could in turn increase the quality of research in synchrotron light sources.
Commissioning and First Run for the CERN Proton Irradiation Facility (IRRAD) after the Long Shutdown 2
Creators: name: Gkotse, Blerina
name: Nunez Herrero, Alfredo Maria
name: Ravotti, Federico
name: Pezzullo, Giuseppe
name: Jaekel, Martin R.
Publisher: name: Zenodo
Year: 2023
Subjects: WP4

description: The CERN Proton Irradiation Facility (IRRAD) is a reference facility for performing irradiation experiments and qualification of tracking and calorimetry detectors, important for the upgrade of CERN Large Hadron Collider (HL-LHC) and for the R&D on future CERN accelerators. After the CERN Long Shutdown 2, the IRRAD facility has undergone through several changes on hardware and software systems as well as at the infrastructure level. This latter includes a completely new beamline to deliver the irradiation beam as well as improvements at the beam diagnostic level.
In this talk, the current upgrades will be presented including new beam instrumentation, data management and control systems. Moreover, the first proton beam commissioning and IRRAD operation after the Long Shutdown 2 will be discussed as well as the plan about the future IRRAD operation in 2022. Details will be also provided about preliminary tests performed with heavy ions on the new beamline.
In addition, status updates about the two online databases of worldwide Irradiation and Test Beam Facilities will be presented.
description: Presentation given at the  BTTB workshop, Lecce, Italy.
https://indico.cern.ch/event/1058977/contributions/4631385/
Urban-rural relations as a source of transfer of knowledge: some examples from rural surrounding of Bratislava
Creators: name: Székely, Vladimír
name: Székely, Vladimír
Publisher: name: Unknown
Year: 2013
Subjects: subject: Community/Rural/Urban Development
subject: Labor and Human Capital
subject: Teaching/Communication/Extension/Profession
subject: suburbanization
subject: urban-rural relations
subject: transfer of knowledge
subject: “two tier” rural society
subject: rural surrounding of Bratislava
subject: Slovakia

description: In-migration is generally accepted as a decisive factor of rural social and economic development and potential rural regeneration. Intellectual quality and practical experiences of new arrivals with their theoretical and practical knowledge, and also with their network of interpersonal contacts, influence (or have the potential to influence) the social and economic development trajectories in positive or negative sense. It was supposed and now is observed the diffusion of innovation (mainly in behaviour) is very dynamic. New forms of neo-liberal behaviour of new inhabitants of rural areas are in the distinct contradiction with rural traditional life and contribute not only to the important, but ambivalently perceived structural changes, but also to the conflicts with locally born population. The aim of the paper is contribute to the discussion about developmental potentials of rural areas in the surrounding of Bratislava under positive and negative impact of in-migrants and their knowledge transfer into rural environment. We use the results of newspaper monitoring about “two tier” rural society, together with overview of relevant published studies in geography, economy, and sociology, and additional face-to face interviews with rural inhabitants.
Acceptance of innovation diffusion in rural areas - a Romanian Case Study
Creators: name: Tudor, Monica Mihaela
name: Florian, Violeta
name: Chitea, Mihai Alexandru
name: Tudor, Monica Mihaela
name: Florian, Violeta
name: Chitea, Mihai Alexandru
Publisher: name: Unknown
Year: 2013
Subjects: subject: Community/Rural/Urban Development
subject: International Development
subject: Research Methods/ Statistical Methods
subject: innovation
subject: agricultural knowledge system
subject: Romania

description: In our paper we tried to investigate the organisation and functioning of the Agricultural Knowledge System in Romania. On the basis of system analysis approaches, we critically examined the set of public and private organisations dedicated to research, education and extension, and their interaction with knowledge users (traditional farmers) and the main system failures and strengths in the innovation process in agriculture were identified. The empirical research in this study had a heuristic value.
title: Generalized additive models: background, definitions, extensions
Creators: name: Rieser, Christopher
Publisher: name: TU Wien
Year: 2018
Subjects: subject: Generalized linear models
subject: nonlinear functions

description: This thesis gives an extensive overview of generalized additive models withan outlook on their robustication. Chapter 1 shortly introduces the mainproblems with the linear model - with Gaussian errors. Chapter 2 considers additive models and generalized linear models.In Chapter 3 additive models and generalized linear models will be merged towhat is known as generalized additive models. Furthermore, we will discussone way of robustifying the latter and end with three illustrations of GAMs.
Evaluation of the use of polyurethane residue aggregated to the plaster of civil construction
Creators: name: Oliveira, Guilherme Moraes De
name: Vittória Caroline Souza Dos Santos
name: Souza, José De
name: Rocha, Tatiana Louise Ávila C.
Publisher: name: figshare
Year: 2020
Subjects: subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: The study deals with the reuse of polyurethane (PU) obtained from a kitchen sponge added to plaster for use in civil engineering. The kitchen sponge is an item widely used by the population in their daily lives, generating a significant accumulation of waste. Thus, from the analysis of the properties of the kitchen sponge, it was seeking possible reuse of the kitchen sponge using it as an aggregate in plaster. The objective is to evaluate the properties of the material and consequently the search for an alternative of reuse of the waste to reduce the impact of the waste on the environment from the disposal. The methodology is composed of the collection of kitchen sponges already used, the processing, its application as an aggregate to gypsum and water, the preparation of plates for the tests and the evaluation of the properties. In general, the mixture presents significant results, highlighting excellent impact resistance and maintaining characteristics of the plaster, such as its pick time and compressive strength.
Vienne, exercice DIT Aquitaine, 1957
Creators: name: Martin, Annie
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2016
Subjects: Guerre froide
Vienne (France) -- 1957

description: Coverage: Vienne
description: Cette carte appartient à la collection « Guerre froide vue d’en bas » élaborée dans le cadre de l’enquête 2009-2013 du réseau des correspondants départementaux de l’IHTP « La Guerre froide vue d’en bas : 1947-1967 », enquête conduite sous la direction de Philippe Buton Professeur d’Histoire contemporaine à l’Université de Reims, d’Olivier Büttner Ingénieur de Recherche IHTP-CNRS et de Michel Hastings, Professeur de Science politique à l’Institut d’Etudes Politiques de Lille.
Nontrivial coupling of light into a defect: the interplay of nonlinearity and topology
Creators: name: Xia, Shiqi
name: Jukić, Dario
name: Wang, Nan
name: Smirnova, Daria
name: Smirnov, Lev
name: Tang, Liqin
name: Song, Daohong
name: Szameit, Alexander
name: Leykam, Daniel
name: Xu, Jingjun
name: Chen, Zhigang
name: Buljan, Hrvoje
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The flourishing of topological photonics in the last decade was achieved mainly due to developments in linear topological photonic structures. However, when nonlinearity is introduced, many intriguing questions arise. For example, are there universal fingerprints of underlying topology when modes are coupled by nonlinearity, and what can happen to topological invariants during nonlinear propagation? To explore these questions, here we experimentally demonstrate nonlinearity-induced coupling to topologically protected edge states using a photonic platform, and theoretically develop a general framework for interpreting the mode-coupling dynamics in nonlinear topological systems. Performed in laser-written photonic Su-Schrieffer-Heeger lattices, our experiments reveal nonlinear coupling of light into a nontrivial edge or interface defect channel otherwise not permissible due to topological protection. Our theory explains well all the observations. Furthermore, we introduce the concepts of inherited and emergent nonlinear topological phenomena, and a protocol capable of unveiling the interplay of nonlinearity and topology. These concepts are applicable for other nonlinear topological systems, either in higher dimensions or beyond our photonic platform.
description: are welcome!
Asteroseismology of exoplanets hosts stars : tests of internal metallicity
Creators: name: Bazot, M.
name: Vauclair, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Exoplanets host stars present a clear metallicity excess compared to stars without detected planets, with an average overabundance of 0.2 dex. This excess may be primordial, in which case the stars should be overmetallic down to their center, or it may be due to accretion in the early phases of planetary formation, in which case the stars would be overmetallic only in their outer layers. In the present paper, we show the differences in the internal structure of stars, according to the chosen scenario. Namely two stars with the same observable parameters (luminosity, effective temperature, outer chemical composition) are completely different in their interiors according to their past histories, which we reconstitute through the computations of their evolutionary tracks. It may happen that stars with an initial overmetallicity have a convective core while the stars which suffered accretion do not. We claim that asteroseismic studies of these exoplanets host stars can give clues about their internal structures and metallicities, which may help in understanding planetary formation.
description: 24 pages, 18 figures, accepted by A&A
Assessment of farmers role in relation to the support of rural communities
Creators: name: Trantinová, Marie
name: Štolbová, Marie
name: Trantinová, Marie
name: Štolbová, Marie
Publisher: name: Unknown
Year: 2013
Subjects: subject: Community/Rural/Urban Development
subject: International Development
subject: Labor and Human Capital
subject: Rural Development Plan
subject: LEADER
subject: evaluation of measures of the Axis III of the RDP

description: All EU countries prepare new Rural Development Plan 2014-2020 for agriculture and rural areas incl. LEADER. An integral part of the planned document is analysis of rural areas and the LEADER programme. Some key questions were solved during the analysis. Such as: “How to target financial support to rural areas to achieve high effect in the social, economic and environmental terms.” The analysis requires objective documented data of results of many studies and surveys. Experience shows that often it is not easy to obtain the required data concerning awareness among applicants, the potential of social capital or the needs to improve infrastructures or level of enterprise in rural areas. Very important source was the RDP 2011 Mid-term review in the Czech Republic. The main results of the analysis showed that it is vitally necessary to increase employment in rural areas by strengthening rural economy and social capital. It is very important to exchange experience among European countries during the preparation, implementation delivery and evaluation of the RDP.
On thermomechanics of multilayered beams
Creators: name: Barretta, Raffaele
name: Čanađija, Marko
name: de Sciarra, Francesco Marotti
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this paper, the mechanical behavior of multilayered small-scale beams in nonisothermal environment is investigated. Scale phenomena are modeled by means of the mathematically well-posed and experimentally consistent stress-driven integral formulation of elasticity. The present research extends the treatment in [1] confined to elastically homogeneous nano-scopic structures. It is shown that the non-locality leads to a complex coupling between axial and transverse elastic displacements. Such a size-dependent phenomenon makes the solution of the relevant nonlocal thermoelastostatic problem, governed by a system of two ordinary differential equations with ten standard boundary conditions and non-classical constitutive boundary conditions, significantly more involved with respect to treatments in literature. Thus, a novel solution methodology, based on Laplace transforms, is proposed and illustrated by examining simple structural schemes of current applicative interest in Nanomechanics and Nanotechnology.
Temperature-dependent soft x-ray photoemission and absorption studies of charge disproportionation in La$_{1-x}$Sr$_x$FeO$_3$
Creators: name: Wadati, H.
name: Chikamatsu, A.
name: Hashimoto, R.
name: Takizawa, M.
name: Kumigashira, H.
name: Fujimori, A.
name: Oshima, M.
name: Lippmaa, M.
name: Kawasaki, M.
name: Koinuma, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have measured the temperature dependence of the photoemission and x-ray absorption spectra of La$_{1-x}$Sr$_x$FeO$_3$ (LSFO) epitaxial thin films with $x=0.67$, where charge disproportionation ($3{Fe}^{3.67+}\to 2{Fe}^{3+}+ {Fe}^{5+}$) resulting in long-range spin and charge ordering is known to occur below $T_{CD}=190$ K. With decreasing temperature we observed gradual changes of the spectra with spectral weight transfer over a wide energy range of $\sim 5$ eV. Above $T_{CD}$ the intensity at the Fermi level ($E_F$) was relatively high compared to that below $T_{CD}$ but still much lower than that in conventional metals. We also found a similar temperature dependence for $x=0.4$, and to a lesser extent for $x=0.2$. These observations suggest that a local charge disproportionation occurs not only in the $x=0.67$ sample below $T_{CD}$ but also over a wider temperature and composition range in LSFO. This implies that the tendency toward charge disproportionation may be the origin of the unusually wide insulating region of the LSFO phase diagram.
description: 6 pages, 8 figures
title: Ocean surface generation and rendering
Creators: name: Gamper, Thomas
Publisher: name: TU Wien
Year: 2018
Subjects: subject: ocean rendering
subject: real-time rendering
subject: levels of detail
subject: ocean rendering
subject: real-time rendering
subject: levels of detail

description: Die realistische Darstellung von Wasseroberflächen ist seit jeher ein beliebtes Forschungsthema in der Computergraphik. Vor allem das Rendern des weiten Ozeans in Echtzeit stellt eine besondere Herausforderung dar. Die Gründe hierfür sind vielseitig. Unter anderem ist der Ozean ein riesiges Gewässer, welches wir auf sehr unterschiedliche Art und Weise abbilden möchten, von der detaillierten Nahaufnahme bis zum weitläufigen Panorama. Zusätzlich stellt der Ozean ein sehr komplexes, dynamisches System dar, das aus einer riesigen Anzahl Wellen unterschiedlicher Größe besteht, vom riesigen Tsunami bis zur millimeterkleinen Kapillarwelle. Wir präsentieren in dieser Arbeit Algorithmen um den weiten Ozean nicht nur in Echtzeit zu rendern, sondern auch alle dafür benötigten Daten in Echtzeit zu generieren. Unser Fokus liegt darauf, glaubhafte Ozeanoberflächen mittels Wellenspektren zu erzeugen, wobei letztere dem Forschungsbereich der Ozeanographie entspringen. Wir untersuchen unterschiedliche Wellenspektren sowohl auf ihre Eigenheiten, als auch auf ihre Eignung für die Darstellung mittels Echtzeitgraphik-Algorithmen. Zusätzlich erläutern wir die notwendigen Hintergründe um unterschiedlich Wellenspektren sinnvoll in eine gemeinsames Grundstruktur zu integrieren. Selbige ermöglicht es uns schlussendlich, unabhängig vom gewählten Wellenspektrum, nicht nur glaubhafte, sondern auch stimmige Ozeanoberflächen zu erzeugen.
description: The synthesis of a believable depiction of the ocean surface is a permanent topic of interest in computer graphics. It represents even more of a challenge for applications which require the real-time display of a water body as large as the ocean. That is because the ocean is a highly dynamic system which combines waves at all scales, ranging from millimetres to kilometres. Moreover, the ocean may be observed from several distances, ranging from close-ups to views which reach the horizon. Thus, we present a framework to generate and render the open ocean in real time, for arbitrary viewing distances and including waves at all scales. We focus our efforts on the geometry of the animated ocean surface, for which we leverage a set of wave spectrum models from oceanographic research. We discuss the intricacies of said models, as well as their fitness for real-time rendering. Moreover, we delineate in detail how to integrate distinct wave spectrum models into a coherent framework, from which one is able obtain believable, consistent and coherent results.