cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Vortices in exciton-polariton condensates with polarization splitting
Creators: name: Solano, M. Toledo
name: Rubo, Yuri G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The presence of polarization splitting of exciton-polariton branches in planar semiconductor microcavities has a pronounced effect on vortices in polariton condensates. We show that the TE-TM splitting leads to the coupling between the left and right half-vortices (vortices in the right and left circular components of the condensate), that otherwise do not interact. We analyze also the effect of linear polarization pinning resulted from a fixed splitting between two perpendicular linear polarizations. In this case, half-vortices acquire strings (solitons) attached to them. The half-vortices with strings can be detected by observing the interference fringes of light emitted from the cavity in two circular polarizations. The string affects the fringes in both polarizations. Namely, the half-vortex is characterized by an asymmetric fork-like dislocation in one circular polarization; the fringes in the other circular polarization are continuous, but they are shifted by crossing the string.
description: 4 pages, 2 figs, Optics of Excitons in Confined Systems 11 (Madrid, 7-11 september 2009)
PR - Economic Costs Of Soil Nutrient Mining And Benefits From Plant Nutrient Recycling: The Case Of Switchgrass Produced For Bioenergy Feedstock
Creators: name: Biermacher, Jon T.
name: Haque, Mohua
name: Kering, Maru K.
name: Guretzky, John A.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Resource /Energy Economics and Policy
subject: Switchgrass
subject: bioenergy
subject: economic sustainability

description: Few attempts have been made to account for the potential costs associated with soil nutrient mining or the potential benefits associated with nutrient remobilization in switchgrass pastures established and managed as a dedicated bioenergy feedstock crop. Continuous soil nutrient mining could result in declining yields and profitability in the long-run and ultimately final exit out of switchgrass production. The objective of this study was to determine the cost associated with nutrient mining and the potential benefits associated with nutrient remobilization associated with one and two-cut switchgrass harvest systems in the southern Great Plain, USA. Data collected from a four-year, two-location agronomic field trial that evaluated two harvest systems, five N rates, and fixed rates of P and K applications were used for analysis. A standard forage analysis was used to determine the concentrations of N, P and K nutrients in the feedstock harvested. Cost of mining (or benefit of recycling) was estimated by comparing two separate economic models. Model 1 follows the conventional economic approach of utilizing yield response to treatments levels of N, P and K. Model 2 follows an approach that accounts for the costs and benefits associated with the N, P and K concentrations removed by the plants at harvest. Results from the convention economic approach indicate that producers should harvest twice per year, lending the system to mine significant quantities of N, P and K. When the benefits and costs associated with total nutrient uptake from plants were accounted, assuming a $110 Mg-1 for feedstock, the results indicate a producer would be better off harvesting twice (once in the summer and again in the winter), and the non-market economic tradeoff between nutrient mining and long-run soil sustainability was $8.70 Mg-1.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
Experimental analysis of heat and mass transfer in non-isothermal sloshing using a model-based inverse method
Creators: name: Marques, Pedro
name: Simonini, Alessia
name: Peveroni, Laura
name: Mendez, Miguel Alfonso
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Nonisothermal liquid sloshing in partially filled reservoirs can significantly enhance heat and mass transfer between liquid and ullage gasses. This can result in large temperature and pressure fluctuations, producing thrust oscillations in spacecraft and challenging thermal management control systems. This work presents an experimental characterization of the thermodynamic evolution of a cylindrical reservoir undergoing sloshing-induced thermal de-stratification. We use a 0D model-based inverse method to retrieve the heat and mass transfer coefficients in planar and swirl sloshing conditions from the temperature and pressure measurements in the liquid and the ullage gas. The experiments were carried out in the SHAKESPEARE shaking table of the von Karman Institute in a cuboid quartz cell with a cylindrical cut-out of 80 mm diameter in the centre, filled up to 60mm with the cryogenic replacement fluid HFE-7200. A thermal stratification with 25 K difference between the ullage gas and liquid was set as the initial conditions. A pressure drop of 90% in the ullage gas was documented in swirling conditions. Despite its simplicity, the model could predict the system's thermodynamic evolution once the proper transfer coefficients were derived.
description: 18 pages, 14 figures, 4 tables
Implications of an additional scale on leptogenesis
Creators: name: Sierra, D. Aristizabal
name: Muñoz, Luis Alfredo
name: Nardi, Enrico
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider variations of the standard leptogenesis picture arising from the presence of an additional scale related to the breaking of a $U(1)_X$ abelian flavor symmetry. We show that quite generically the presence of an additional energy scale might introduce new qualitative and quantitative changes on leptogenesis. Especially interesting is the possibility of having succesful TeV leptogenesis with a vanishing total CP violating asymmetry. By solving the corresponding Boltzmann equations it is shown that these kind of scenarios encounters no difficulties in generating the Cosmic baryon asymmetry.
description: 9 pages, 8 figures. To appear in the proceedings of DISCRETE'08: Symposium on Prospects in the Physics of Discrete Symmetries, Valencia, Spain, 11-16 Dec 2008
title: Магнитно-резонансная семиотика при воспалительных поражениях метаэпифизарной зоны у детей
title: Magnetic Resonance Semiotics in Inflammatory Lesions of the Metaephysical Zone in Children
Creators: name: Шолохова, Наталия Александровна
Publisher: name: Издательский центр СурГУ
Year: 2021

description: Цель – изучить возможности метода магнитно-резонансной томографии при острых поражениях эпифизов
и метафизов костей у детей старше года и подростков. Материал и методы. Проведен анализ данных лучевых
исследований 76 экстренно обратившихся пациентов с острым гематогенным остеомиелитом. Возрастной состав группы исследования – от 1 года до 17 лет с преобладанием мальчиков в возрасте 12–18 лет (70 %). Результаты. Ранний период остеомиелитического процесса характеризовался рентгенонегативной диагностической
стадией по причине отсутствия деструктивных изменений костной ткани. У 93,4 % (63/76) детей с подтвержденным диагнозом острого воспалительного заболевания на первичных рентгенограммах не были выявлены признаки деструкции. Ультразвуковое исследование показало диагностическую эффективность в отношении мягкотканных изменений и патологии структур сустава, предоставляя косвенную информацию. Магнитно-резонансная томография на ранних стадиях воспалительного процесса в полной мере (76/76; 100 %) позволила визуализировать интарамедуллярные изменения в виде трабекулярного отека костного мозга, утолщения надкостницы (73/76; 96,1 %) и изменения параоссальных мягких тканей (75/76; 98,7 %) уже на 3–5 день заболевания.
В 92,1 % случаев были выявлены признаки синовита, в то время как ультразвуковое исследование предоставляло информацию в 78,9 % случаев.
description: The study aims to analyze the possibilities of the magnetic resonance imaging method in acute lesions of the epiphyses and metaphyses of bones in children over one year old and adolescents. Material and methods. In the course of the study, the analysis of the radiography studies data of 76 urgently applied patients with acute hematogenous osteomyelitis was carried out. The age of the patients ranged from 1 to 17 years old, with predominance of male patients of 12-18 years old (70 %). Results. The early period of osteomyelitis process was characterized with X-ray negative diagnostic stage due to the absence of destructive changes in the bone tissue. No signs of destruction were found during the first X-ray in 93.4 % (63/76) children with confirmed diagnosis of acute inflammatory disease. The ultrasound imaging study has shown the diagnostic efficiency in relation with soft tissue and pathology of joint structures, providing indirect information about the bone pathology. Magnetic resonance imaging, performed at the early stage of inflammatory process, fully (76/76; 100 %) allowed to visualize intramedullary changes such as trabecular edema of the bone marrow, periosteal thickening (73/76, 96.1 %) and changes of the paraosseous soft tissues (75/76; 98.7 %). These changes were determined on the 3-5th day of the disease. The signs of synovitis were determined by magnetic resonance imaging, whilst ultrasound imaging provided information in 78.9 % of cases.
Dynamical localization of gap-solitons by time periodic forces
Creators: name: Bludov, Yu. V.
name: Konotop, V. V.
name: Salerno, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The phenomenon of dynamical localization of matter wave solitons in optical lattices is first demonstrated and the conditions for its existence are discussed. In addition to the trapping linear periodic potential we use a periodic modulation of the nonlinearity in space to eliminate nonexistence regions of gap-solitons in reciprocal space. We show that when this condition is achieved, the observation of dynamical localization in true nonlinear regime becomes possible. The results apply to all systems described by the periodic nonlinear Schrödinger equation, including Bose-Einstein condensates of ultracold atoms trapped in optical lattices and arrays of waveguides or photonic crystals in nonlinear optics.
description: accepted for Europhysics Letters
PR - Investment Decision Support System For High Quality Control Posts In EU
Creators: name: Baltussen, Willy
name: Hennen, Wil
name: GÄ™Bska, Monika
Publisher: name: Unknown
Year: 2013
Subjects: subject: Research Methods/ Statistical Methods
subject: control post
subject: investment
subject: BEP

description: In 2010 an EU subsidy program started to create high quality control posts in Europe. Control posts are companies offering facilities for animals to rest and eat during long distance transport. They also offer facilities for trucks, drivers and competent authorities. A decision support program has been developed to support owners of control posts with their investment plan. The aim of this computer program is to calculate what increase in truckloads or in price per truckload is needed to justify the investment plans. The program was tested at two control posts participating in the EU project in Poland1. Both owners appreciated the added value of the program and suggested some improvements.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
Towards Cooperative Flight Control Using Visual-Attention
Creators: name: Yin, Lianhao
name: Chahine, Makram
name: Wang, Tsun-Hsuan
name: Seyde, Tim
name: Liu, Chao
name: Lechner, Mathias
name: Hasani, Ramin
name: Rus, Daniela
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The cooperation of a human pilot with an autonomous agent during flight control realizes parallel autonomy. We propose an air-guardian system that facilitates cooperation between a pilot with eye tracking and a parallel end-to-end neural control system. Our vision-based air-guardian system combines a causal continuous-depth neural network model with a cooperation layer to enable parallel autonomy between a pilot and a control system based on perceived differences in their attention profiles. The attention profiles for neural networks are obtained by computing the networks' saliency maps (feature importance) through the VisualBackProp algorithm, while the attention profiles for humans are either obtained by eye tracking of human pilots or saliency maps of networks trained to imitate human pilots. When the attention profile of the pilot and guardian agents align, the pilot makes control decisions. Otherwise, the air-guardian makes interventions and takes over the control of the aircraft. We show that our attention-based air-guardian system can balance the trade-off between its level of involvement in the flight and the pilot's expertise and attention. The guardian system is particularly effective in situations where the pilot was distracted due to information overload. We demonstrate the effectiveness of our method for navigating flight scenarios in simulation with a fixed-wing aircraft and on hardware with a quadrotor platform.
Aspects of leaf and extract production from Tasmannia lanceolata
Creators: name: Read, CD
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis examines several aspects of the preparation, extraction and analysis of solvent soluble compounds from leaf material of Tasmannia lanceolata and reports a preliminary survey of extracts of some members of the natural population of the species in Tasmania. A major constituent of these extracts, polygodial, was shown to be stored within specialised idioblastic structures scattered throughout the mesophyll, and characterised by distinctive size and shape, and a thickened wall. The contents of these cells were sampled directly, analysed and compared with the composition of extracts derived from ground, dry whole leaf. This result was supported by spectroscopic analysis of undisturbed oil cells in whole leaf tissue. In a two year field trial, the progressive accumulation of a number of leaf extract constituents (linalool, cubebene, caryophyllene, germacrene D, bicyclogermacrene, cadina-1,4 - diene, aristolone and polygodial) during the growth flush was followed by a slow decline during the subsequent dormant season. These results were interpreted in relation to leaf dry matter accumulation, in order to propose a harvest period within which leaf material will produce consistent composition of extract. Under four levels of irradiance in a growth cabinet experiment the plant exhibited many characteristics of a 'shade' species, in particular, a limited ability to acclimate to high light levels. Assimilation rates were highest at 150˜í¬¿mol m-2s-l while elevated respiration rates and a reduced quantum yield occurred at a higher light level. Maximum assimilation rates in leaves grown at 150˜í¬¿mol m-2s-l were obtained at around 250˜í¬¿mol m-2s-l. Optimum net assimilation rate was obtained from 18-25¬¨‚àûC. The effect of level of irradiance on the proportion of extractable compounds in the leaf, chlorophyll levels, specific leaf area, leaf thickness and percentage dry matter in the leaf are reported and discussed in relation to a probable production system in which the new canopy is largely removed at the end of each growth cycle. The ontogenetic patterns determining canopy architecture were observed in the field, and used, with support from the results of a trial pruning of mature trees, to discuss the likely outcome of various harvest methods. These results are combined to suggest a production strategy for maximum yield of leaf extract of consistent composition. The strategy proposes harvesting in late summer, after new leaf has achieved full maturity and may enable full canopy recovery in the subsequent growing season.
Critical behaviour of the Ising S=1/2 and S=1 model on (3,4,6,4) and (3,3,3,3,6) Archimedean lattices
Creators: name: Lima, F. W. S.
name: Mostowicz, J.
name: Malarz, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the critical properties of the Ising S=1/2 and S=1 model on (3,4,6,4) and (3,3,3,3,6) Archimedean lattices. The system is studied through the extensive Monte Carlo simulations. We calculate the critical temperature as well as the critical point exponents gamma/nu, beta/nu and nu basing on finite size scaling analysis. The calculated values of the critical temperature for S=1 are k_BT_C/J=1.590(3) and k_BT_C/J=2.100(4) for (3,4,6,4) and (3,3,3,3,6) Archimedean lattices, respectively. The critical exponents beta/nu, gamma/nu and 1/nu for S=1 are beta/nu=0.180(20), gamma/nu=1.46(8) and 1/nu=0.83(5) for (3,4,6,4) and 0.103(8), 1.44(8) and 0.94(5) for (3,3,3,3,6) Archimedean lattices. Obtained results differ from the Ising S=1/2 model on (3,4,6,4), (3,3,3,3,6) and square lattice. The evaluated effective dimensionality of the system for S=1 are D_{eff}=1.82(4) for (3,4,6,4) and D_{eff}=1.64(5) for (3,3,3,3,6).
description: 4 pages with 4 figures in 8 EPS files, RevTeX4
On the wellposedness for a fuel cell problem
Creators: name: Consiglieri, Luisa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 76S05, 80A50, 35Q35, 35Q79, 35J57, 35D30

description: This paper investigates the existence of weak solutions to two problems set of elliptic equations in adjoining domains, with Beavers--Joseph--Saffman and regularized Butler--Volmer boundary conditions being prescribed on the common interfaces, porous-fluid and membrane, respectively. Mathematically, the modeling tool is the coupled Stokes/Darcy problem, which consists of the Stokes equation on one part of the domain coupled to the Darcy equation, where the flow velocities are small and mainly driven by the pressure gradient in porous medium, completed by the thermoelectrochemical (TEC) system, which consists of the energy equation and the mass transport associated with electrochemical reactions, where the fluxes are given by generalized Fourier, Fick and Ohm laws, by including the Dufour--Soret and Peltier--Seebeck cross effects, in the multidimensional domain. The present model includes macrohomogeneous models for both hydrogen and methanol crossover. The novelty in the presented model lies in the presence of the Joule effect into the Stokes/Darcy-TEC system altogether to the quasilinear character given by temperature dependence of the physical parameters such as the viscosities and the diffusion coefficients, by the concentration-temperature dependence of cross-effects coefficients, and by the pressure dependence of the permeability. The purpose of the present work is to derive quantitative estimates for solutions to explicit smallness conditions on the data. We use fixed point and compactness arguments based on the quantitative estimates of approximated solutions.
description: 25 pages, 2 figures
Key Components of Bioequivalence Assessment of Medicinal Products for Veterinary Use
Creators: name: Community Of Reviewers Of The International Research Journal
Publisher: name: Cifra LLC
Year: 2023
Subjects: bioequivalence
pharmacokinetic equivalence
veterinary medicinal product
биоэквивалентность
фармакокинетическая эквивалентность
ветеринарное лекарственное средство

description: Journal of Agriculture and Environment, Выпуск 12 (40) 2023
Bipolaron Density-Wave Driven By Antiferromagnetic Correlations and Frustration in Organic Superconductors
Creators: name: Clay, R. T.
name: Li, H.
name: Mazumdar, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We describe the Paired Electron Crystal (PEC) which occurs in the interacting frustrated two-dimensional 1/4-filled band. The PEC is a charge-ordered state with nearest-neighbor spin singlets separated by pairs of vacant sites, and can be thought of as a bipolaron density wave. The PEC has been experimentally observed in the insulating state proximate to superconductivity in the organic charge-transfer solids. Increased frustration drives a PEC-to-superconductor transition in these systems.
description: submitted to Physica B special issue for ISCOM 2009
Bounds on Factors in Z[x]
Creators: name: Abbott, John
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13P05, 12Y05

description: We gather together several bounds on the sizes of coefficients which can appear in factors of polynomials in Z[x]; we include a new bound which was latent in a paper by Mignotte, and a few minor improvements to some existing bounds. We compare these bounds and show that none is universally better than the others. In the second part of the paper we give several concrete examples of factorizations where the factors have "unexpectedly" large coefficients. These examples help us understand why the bounds must be larger than you might expect, and greatly extend the collection published by Collins.
description: 35 pages, no figures
PR - Polish Consumersâ€™ Reaction To Changes In Prices Of Food Products During The Financial Crisis
Creators: name: BoratyÅ„Ska, Katarzyna
name: Å»Elazowska-PrzewÅ‚Oka, Anna
name: Rembielak-Vitchev, GraÅ¼yna
Publisher: name: Unknown
Year: 2013
Subjects: subject: Demand and Price Analysis
subject: consumers
subject: prices of food products
subject: financial crisis

description: The issue of consumersâ€™s reaction to changes in prices of food products is particularly important at the time of the global financial crisis. The research aimed at surveying the opinions of selected consumers and their reactions to changes in prices of food products during the financial crisis. The literature study reviewed the determinants of the financial crisis, identified its causes and effects, and also assessed changes in prices of food product in Poland over 2007-2012. From the literature it was evident that the global financial crisis was a result of many factors both microeconomic and macroeconomic, i.e. shortcomings of regulatory systems and the rapid growth of the consumption of households financed mainly by debt and the long-term persistence of (real) interest rates at a low level, which led to a rapid growth of credit and an increase in prices of many assets. The questionnaire was conducted among 250 consumers comprising students of two selected universities in Poland and their families. 47% filled-in questionnaires were returned. Results of the analysis showed that during the financial crisis, the prices of most of food products have increased. In the opinion of the surveyed, in the previous 5 years the prices of the following food products increased the most: bread, meat, cold meat, sugar, fruit, and fish. On the other hand, the prices of the following food products dropped the most: water, potatoes and other vegetables.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
PT symmetry breaking and exceptional points for a class of inhomogeneous complex potentials
Creators: name: Dorey, Patrick
name: Dunning, Clare
name: Lishman, Anna
name: Tateo, Roberto
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a three-parameter family of PT-symmetric Hamiltonians, related via the ODE/IM correspondence to the Perk-Schultz models. We show that real eigenvalues merge and become complex at quadratic and cubic exceptional points, and explore the corresponding Jordon block structures by exploiting the quasi-exact solvability of a subset of the models. The mapping of the phase diagram is completed using a combination of numerical, analytical and perturbative approaches. Among other things this reveals some novel properties of the Bender-Dunne polynomials, and gives a new insight into a phase transition to infinitely-many complex eigenvalues that was first observed by Bender and Boettcher. A new exactly-solvable limit, the inhomogeneous complex square well, is also identified.
description: 42 pages, many figures
Micraglossa kianganensis Leger 2024, sp. n.
Creators: name: Léger, Théo
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Micraglossa
Micraglossa kianganensis

description: Micraglossa kianganensis Léger, sp. n.
https://zoobank.org/ FD0D400C-4645-4C66-996C-9A6747AD034F
Figs. 19, 76.
MATERIAL
Holotype: ♂ (specimen identifier MTD11400, DNA barcode BC MTD 01473, genitalia on slide TL1296♂; BOLD sample ID PYRG626-11). PHILIPPINES: Luzon, Ifugao, Kiangan, 750 m, 10/11/1985 (J. Settele). Deposited in MTD.
DIAGNOSIS
In male genitalia (Fig. 76), the slender and wavy gnathos lacks the subapical dorsal conical projection observed on the other congeneric species from the Philippines. Females are not known.
HABITUS
Forewing length 4 mm, ground color cream and brown. Antemedian band wavy, edged with cream lines. Median area with a mix of cream and brown scales. Postmedian line well marked, S-shaped, running straight down to CuA1, meeting subterminal line at half length, then bent inwardly with 90° angle, running straight towards base, then bent downwards towards dorsum. Subterminal line fuzzy, cream, medially incurved inwards. Margin cream. Fringe cream with brown spots. Hindwing light copper-color.
MALE GENITALIA
Uncus about 1.4 X tegumen arm length, regularly bent downwards, slender, with scattered setae dorsally, apex ventrally with short tooth pointing downwards. Gnathos projection about 0.9 X uncus length, slender, evenly curved downwards, distal 1/4 straightened, tip pointed downwards. Valva dorsal margin sclerotized, strongly concave; ventral margin basally straight, conspicuously curved upwards on distal half; apex broadly rounded. Juxta tongue-shaped. Phallus straight, vesica without cornuti.
FEMALE GENITALIA
Not known.
DISTRIBUTION
PHILIPPINES: Luzon (Ifugao). Collected at an altitude of 750 m.
ETYMOLOGY
Name derived from Kiangan, the locality where the specimen was caught.
description: Published as part of Léger, Théo, 2024, Half of the Diversity Undescribed: Integrative Taxonomy Reveals 32 New Species and a High Cryptic Diversity in the Scopariinae and Crambinae of the Philippines (Lepidoptera: Crambidae), pp. 1-93 in Bulletin of the Society of Systematic Biologists 3 (2) on page 24, DOI: 10.18061/bssb.v3i2.9527, http://zenodo.org/record/15116964
PR - The Extent Of The Structural Change In Primary Agriculture
Creators: name: Brown, William J.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: farm financial structure
subject: profitability
subject: government payments

description: The primary agriculture production industry in OECD countries has been going through rapid increases in the concentration of production, giving rise to concerns about the industry developing into a bimodal distribution of farms with many small lifestyle oriented farms, a growing number of large farms, where the bulk of the production takes place, and fewer middle sized farms. It is true that larger farm businesses produce most of the agricultural commodities and get most of the government payments although less than the percentage of commodities they produce. However increased profitability is not completely correlated with increased farm business size, in that some small and medium sized farms are profitable. Unfortunately, many farm businesses especially the smaller ones are reliant on government payments for their financial survival. This is particularly true for Europe. Finally, the structural change in agricultural production that has occurred in the past will continue into the future. Concentration of production will continue with fewer and larger farm businesses. Niche market farm businesses, part time farms with off-farm income and lifestyle farms will dominate the farm numbers but not farm production.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
PR - Farm Level Financial Analysis Of The Wildlife Sector In South Africa
Creators: name: Cloete, Philippus C.
name: Spies, David C.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Environmental Economics and Policy
subject: wildlife ranching
subject: financial performance
subject: return on investment

description: Despite recent statistics suggesting that the South African Wildlife industry is experiencing economic pressure coupled with a general financial upswing in the livestock sector; there is still an on-going switch from livestock to wildlife ranching making the wildlife sector the fastest growing agricultural sector in South Africa. Assuming that this switch is viewed as rational behaviour; can it be argued that the financial performance of the wildlife sector is still superior when compared with livestock? The study employs a profitability performance measurement in the form of Return on Investment to answer the research question. Primary data, collected by means of personal interviews among leading wildlife ranchers and farmers in the Northern Cape Province of South Africa was used for the required calculations. Results revealed that the economic pressure experienced by the industry is also visible in certain wildlife operations, specifically among wildlife harvesting and biltong hunting operations. Wildlife harvesting in particular yielded significant lower Returns on Investment compared to cattle farming. On the contrary, the financial performance of ranching operations such as a combination between biltong and trophy hunting as well as the breeding of plains and higher-value species for live sales proves to be superior when compared with cattle. Therefore, it is not reasonable to argue that despite economic pressure, the financial performance of wildlife is still superior to that of livestock. Moreover, it can be concluded that the continued switch from livestock to wildlife is only motivated by the financial performance of selected few wildlife operations in South Africa.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
PR - The Role Of Small Farms In Maintaining A Balance In Agroecosystems
Creators: name: Dostatny, Denise F.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Environmental Economics and Policy
subject: weeds
subject: preservation
subject: small farms

description: Rural areas in Poland which offer biological and landscape diversity are of the most abundant in Europe. Small ecological farms, especially in southern and south-eastern Poland, still host rare weed species named in red lists of many European states. The diversity of animal and plant species in these areas is significantly higher than in the remaining parts of Poland. Consequently, the balance of agroecosystems is far more stable. The presence of rare weed species in the fields does not equal lower crop but contributes to maintaining of the considerable diversity of insects or birds. Preserving the mosaic structure of crop fields and traditional rural landscape is only possible on small farms and hence the importance of their further existence.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
Hilbert Irreducibility above algberaic groups
Creators: name: Zannier, Umberto
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 12E05

description: The paper offers versions of Hilbert's Irreducibility Theorem for the lifting of points in a cyclic subgroup of an algebraic group to a ramified cover. A version of Bertini Theorem in this context is also obtained.
description: 22 pages
From motivic Chern classes of Schubert cells to their Hirzebruch and CSM classes
Creators: name: Aluffi, Paolo
name: Mihalcea, Leonardo C.
name: Schürmann, Jörg
name: Su, Changjian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: Primary 14C17, 14M15, Secondary 14C40, 20C08, 14N15

description: The equivariant motivic Chern class of a Schubert cell in a `complete' flag manifold $X=G/B$ is an element in the equivariant K theory ring of $X$ to which one adjoins a formal parameter $y$. In this paper we prove several `folklore results' about the motivic Chern classes, including finding specializations at $y=-1$ and $y=0$; the coefficient of the top power of $y$; how to obtain Chern-Schwartz-MacPherson (CSM) classes as leading terms of motivic classes; divisibility properties of the Schubert expansion of motivic Chern classes. We collect several conjectures about the positivity, unimodality, and log concavity of CSM and motivic Chern classes of Schubert cells, including a conjectural positivity of structure constants of the multiplication of Poincaré duals of CSM classes. In addition, we prove a `star duality' for the motivic Chern classes. We utilize the motivic Chern transformation to define two equivariant variants of the Hirzebruch transformation, which appear naturally in the Grothendieck-Hirzebruch-Riemann-Roch formalism. We utilize the Demazure-Lusztig recursions from the motivic Chern class theory to find similar recursions giving the Hirzebruch classes of Schubert cells, their Poincar{é} duals, and their Segre versions. We explain the functoriality properties needed to extend the results to `partial' flag manifolds $G/P$.
description: 46 pages
Scalar Perturbations in Scalar Field Quantum Cosmology
Creators: name: Falciano, F. T.
name: Pinto-Neto, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper it is shown how to obtain the simplest equations for the Mukhanov-Sasaki variables describing quantum linear scalar perturbations in the case of scalar fields without potential term. This was done through the implementation of canonical transformations at the classical level, and unitary transformations at the quantum level, without ever using any classical background equation, and it completes the simplification initiated in investigations by Langlois \cite{langlois}, and Pinho and Pinto-Neto \cite{emanuel2} for this case. These equations were then used to calculate the spectrum index $n_s$ of quantum scalar perturbations of a non-singular inflationary quantum background model, which starts at infinity past from flat space-time with Planckian size spacelike hypersurfaces, and inflates due to a quantum cosmological effect, until it makes an analytical graceful exit from this inflationary epoch to a decelerated classical stiff matter expansion phase. The result is $n_s=3$, incompatible with observations.
description: 10 pages, 2 figures, accepted version to Physical Review D 79
Generalized parton distributions, the hunt for quark orbital momenta
Creators: name: Voutier, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Generalized Parton Distributions (GPDs) are the appropriate framework for a universal description of the partonic structure of the nucleon. They characterize the dynamics of quarks and gluons inside the nucleon and consequently contain information about the spin of the nucleon. The current experimental knowledge about GPDs is reviewed with the emphasis on the determination of E^q(Q^2,x,xi,t), the least known and constrained GPD, of particular importance in the nucleon spin puzzle. The perspectives of this experimental program are also addressed.
description: 6 pages, 2 figures Proceedings of the XVIIIth Symposium on Spin Physics, Charlottesville (Virginia, USA), October 6-11,2008
The orbifold DT/PT vertex correspondence
Creators: name: Lin, Yijie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14N35

description: We present an orbifold topological vertex formalism for PT invariants of toric Calabi-Yau 3-orbifolds with transverse $A_{n-1}$ singularities. We give a proof of the orbifold DT/PT Calabi-Yau topological vertex correspondence. As an application, we derive an explicit formula for the PT $\mathbb{Z}_{n}$-vertex in terms of loop Schur functions and prove the multi-regular orbifold DT/PT correspondence.
description: Some minor corrections
PR - Rural And Regional Policies For Rural Development - A Strategic Approach In Polish Conditions
Creators: name: Drejerska, Nina
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: agricultural policy
subject: regional policy
subject: rural development

description: Rural and regional policies towards rural areas have been a subject of evaluation and discussions of results. As a consequence some changes have been taken place, even in fundamental assumptions, which determine strategic decisions in the field of public support for rural development. The aim of the paper is to identify similarities and differences in a strategic approach of rural and regional policies towards rural development in Poland basing on a document analysis of the National Strategy of Regional Development 2010-2020: Regions, Cities, Rural Areas and the Strategy for sustainable development of rural areas, agriculture and fisheries 2012-2020. Results of investigations display that both documents setting up strategic objectives for rural development in Poland have a lot in common with new paradigms of rural and regional policies described in OECD works. Both strategies tend towards multifunctional approach enhancing competitiveness of rural areas and assuming engagement of stakeholders of different levels. At this point it is not possible to asses to what extent instruments of the two discussed policies will close to the new approach. It results from a situation when construction of implementation mechanisms is highly influenced by solutions introduced by European cohesion and agricultural policies.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
Compressed sensing for inverse problems and the sample complexity of the sparse Radon transform
Creators: name: Alberti, Giovanni S.
name: Felisi, Alessandro
name: Santacesaria, Matteo
name: Trapasso, S. Ivan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: Information Theory (cs.IT)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 42C40, 44A12, 60B20, 94A20

description: Compressed sensing allows for the recovery of sparse signals from few measurements, whose number is proportional to the sparsity of the unknown signal, up to logarithmic factors. The classical theory typically considers either random linear measurements or subsampled isometries and has found many applications, including accelerated magnetic resonance imaging, which is modeled by the subsampled Fourier transform. In this work, we develop a general theory of infinite-dimensional compressed sensing for abstract inverse problems, possibly ill-posed, involving an arbitrary forward operator. This is achieved by considering a generalized restricted isometry property, and a quasi-diagonalization property of the forward map.
 As a notable application, for the first time, we obtain rigorous recovery estimates for the sparse Radon transform (i.e., with a finite number of angles $θ_1,\dots,θ_m$), which models computed tomography, in both the parallel-beam and the fan-beam settings. In the case when the unknown signal is $s$-sparse with respect to an orthonormal basis of compactly supported wavelets, we prove stable recovery under the condition \[ m\gtrsim s, \] up to logarithmic factors.
description: 57 pages
The Kelley--Meka bounds for sets free of three-term arithmetic progressions
Creators: name: Bloom, Thomas F.
name: Sisask, Olof
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We give a self-contained exposition of the recent remarkable result of Kelley and Meka: if $A\subseteq \{1,\ldots,N\}$ has no non-trivial three-term arithmetic progressions then $\lvert A\rvert \leq \exp(-c(\log N)^{1/11})N$ for some constant $c>0$.
 Although our proof is identical to that of Kelley and Meka in all of the main ideas, we also incorporate some minor simplifications relating to Bohr sets. This eases some of the technical difficulties tackled by Kelley and Meka and widens the scope of their method. As a consequence, we improve the lower bounds for finding long arithmetic progressions in $A+A+A$, where $A\subseteq \{1,\ldots,N\}$.
description: 25 pages
Generation of vortices and observation of Quantum Turbulence in an oscillating Bose-Einstein Condensate
Creators: name: Henn, E. A. L.
name: Seman, J. A.
name: Roati, G.
name: Magalhaes, K. M. F.
name: Bagnato, V. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We report on the experimental observation of vortex formation and production of tangled vortex distribution in an atomic BEC of Rb-87 atoms submitted to an external oscillatory perturbation. The oscillatory perturbations start by exciting quadrupolar and scissors modes of the condensate. Then regular vortices are observed finally evolving to a vortex tangle configuration. The vortex tangle is a signature of the presence of a turbulent regime in the cloud. We also show that this turbulent cloud has suppression of the aspect ratio inversion typically observed in quantum degenerate bosonic gases during free expansion.
description: to appear in JLTP - QFS 2009
PR - Sources Of Finance For Micro, Small And Medium Enterprises In Nigeria
Creators: name: Evbuomwan, G.O.
name: Ikpi, A.E.
name: Okoruwa, V.O.
name: Akinyosoye, V.O.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agricultural Finance
subject: micro
subject: small and medium enterprises
subject: financing

description: Initial attempts of developed and developing countries to eradicate poverty focused on the development of large scale industries, based on the traditional economy of scale theory. However, the economic downturn that followed the collapse of the world oil market in 1980s and the financial crisis in Asia in the 1990s brought to fore the important role of Micro, Small and Medium Enterprises (MSMEs) in industrial and economic development in any given country. It has been recognized that among the constraints to effective development of MSMEs in Nigeria is the limited access of the investors to long term credit. Various credit initiatives have been instituted in the past to improve the access of MSMEs to long term funds. Analysis carried out in this study showed that commercial banks loans constituted over 90 percent of sources of funds to MSMEs in Nigeria and their loans and advances to agriculture and manufacturing sectors combined(where the MSMEs are dominant) grew from N83.40million in 1970 to N1,129,158.30 million in 2009 and averaged N149,106.08 million per annum thereby constituting 17.81% of total commercial banks loans and advances to the Nigerian economy on the average between 1970 and 2009, whereas the MSMEs currently contribute about 50% to the nationâ€™s Gross Domestic Product. Furthermore, the survey results indicated that MSME operators still do not have enough funds for their operations as a frequency analysis indicated that inadequate fund/working capital was the most mentioned problem with a percentage share of 60.7%. In view of the assured role of MSMEs in economic development and poverty alleviation, it is recommended that all the funding apparatus directed at the MSMEs in Nigeria, be sustained and intensified.
description: Nineteenth International Farm Management Congress, Warsaw, Poland, 2013
Agriphila;Alisa;Alloea;Anaclastis;Ancylolomia;Araxates;Araxes;Arequipa;Argyria;Argyroteuchia;Aurelianus;Autarotis;Batiana;Bissetia;Borer;Calamotropha;Calarina;Carvanca;Catancyla;Catoptria;Chaerecla;Charltona;Chilo;Chilona;Chilotraea;Chilus;Corynophora;Crambidiatraea;Crambidion;Crambus;Crunophila;Ctenus;Culladia;Deuterolia;Diadexia;Diatraea;Diatraerupa;Dimorphocrambus;Diphryx;Ditomoptera;Drasa;Eodiatraea;Eoreuma;Epiecia;Eromene;Eschata;Euchromius;Eugrotea;Euparolia;Eurhythma;Eurythma;Exoria;Fernandocrambus;Fissicrambus;Girdharia;Glaucocharis;Halterophora;Hednota;Hypiesta;Hypotomorpha;Iesta;Ismene;Jartheza;Juania;Knysna;Mesolia;Mestolobes;Microcrambus;Microtalis;Myeza;Neargyria;Nechilo;Nephalia;Nirmaladia;Nuarace;Ommatopteryx;Oseriates;Pagmania;Palparia;Pareromene;Pediasia;Pindicitora;Pindicitra;Platytesia;Pogonoptera;Prionapteryx;Prionopteryx;Proceras;Promylaea;Propexus;Prosmixis;Pseudoancylolomia;Pseudocatharylla;Pseudoctenella;Pseudopediasia;Silveria;Surattha;Talis;Tetrachila;Thaumatopsis;Thinasotia;Tollia;Trinidadia;Ubida;Urola;Xubida;Zeadiatraea Latreille 1810
Creators: name: Léger, Théo
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae

description: CRAMBINAE Latreille, 1810
Type genus: Crambus Fabricius, 1798
= Crambina Zeller, 1847: 745
= Tetrachila Hübner, 1818: 23, 28, 30, [34]
description: Published as part of Léger, Théo, 2024, Half of the Diversity Undescribed: Integrative Taxonomy Reveals 32 New Species and a High Cryptic Diversity in the Scopariinae and Crambinae of the Philippines (Lepidoptera: Crambidae), pp. 1-93 in Bulletin of the Society of Systematic Biologists 3 (2) on page 24, DOI: 10.18061/bssb.v3i2.9527, http://zenodo.org/record/15116964
Morphology of the Local Volume
Creators: name: Kerscher, M.
name: Tikhonov, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: To study the global morphology of the galaxy distribution in our local neighbourhood we calculate the Minkowski functionals for a sequence of volume limited samples within a sphere of 8 Mpc centred on our galaxy. The well known strong clustering of the galaxies and the dominance of voids and coherent structures on larger scales is clearly visible in the Minkowski functionals. The morphology of the galaxy distribution changes with the limiting absolute magnitude. The samples, encompassing the more luminous galaxies, show emptier voids and more pronounced coherent structures. Indeed there is a prominent peak in the luminosity function of isolated galaxies for MB approx. -14, which at least partly explains these morphological changes. We compare with halo samples from a LambdaCDM simulation. Special care was taken to reproduce the observed local neighbourhood as well as the observed luminosity function in these mock samples. All in all the mock samples render the global morphology of the galaxy distribution quite well. However the detailed morphological analysis reveals that real galaxies cluster stronger, the observed voids are emptier and the structures are more pronounced compared to the mock samples from the LambdaCDM simulation.
description: aa.cls, 10 pages with 10 figures, accepted for publication in A&A