cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamical instabilities in systems of multiple short-period planets are likely driven by secular chaos: a case study of Kepler-102
Creators: name: Volk, Kathryn
name: Malhotra, Renu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigated the dynamical stability of high-multiplicity Kepler and K2 planetary systems. Our numerical simulations find instabilities in $\sim20\%$ of the cases on a wide range of timescales (up to $5\times10^9$ orbits) and over an unexpectedly wide range of initial dynamical spacings. To identify the triggers of long-term instability in multi-planet systems, we investigated in detail the five-planet Kepler-102 system. Despite having several near-resonant period ratios, we find that mean motion resonances are unlikely to directly cause instability for plausible planet masses in this system. Instead, we find strong evidence that slow inward transfer of angular momentum deficit (AMD) via secular chaos excites the eccentricity of the innermost planet, Kepler-102 b, eventually leading to planet-planet collisions in $\sim80\%$ of Kepler-102 simulations. Kepler-102 b likely has a mass $>\sim0.1M_{\oplus}$, hence a bulk density exceeding about half Earth's, in order to avoid dynamical instability. To investigate the role of secular chaos in our wider set of simulations, we characterize each planetary system's AMD evolution with a "spectral fraction" calculated from the power spectrum of short integrations ($\sim5\times10^6$ orbits). We find that small spectral fractions ($\lesssim0.01$) are strongly associated with dynamical stability on long timescales ($5\times10^9$ orbits) and that the median time to instability decreases with increasing spectral fraction. Our results support the hypothesis that secular chaos is the driver of instabilities in many non-resonant multi-planet systems, and also demonstrate that the spectral analysis method is an efficient numerical tool to diagnose long term (in)stability of multi-planet systems from short simulations.
description: accepted for publication in AJ
Leon Bakst's Set Design : Modern Classicism
Creators: name: Dellaccio, Laurie
name: Broude, Norma
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
RESEARCH NOTE: PROBLEMS AND OPPORTUNITIES IN AGRICULTURE - PERCEPTIONS OF COMMERCIAL FARMERS IN NATAL
Probleme en geleenthede in die landbou: Persepsies van kommersiele boere in Natal
Creators: name: Woodburn, M. R.
name: Ortmann, G. F.
name: Woodburn, M. R.
name: Ortmann, G. F.
Publisher: name: Unknown
Year: 1994
Subjects: Agribusiness
Production Economics

description: The perceptions of commercial farmers in Natal of factors influencing the direction of their farm business in the future, and views of future management problems and opportunities in agriculture are discussed in this research note. Economic and financial changes, as well as changes in political, labour and climatic conditions were expected to be the most important factors influencing the future direction of farm businesses. Labour management was cited by most respondents to be a problem, other areas of concern being increasing production costs, political changes, economic and financial aspects, and climatic uncertainty. Improved production efficiency and marketing opportunities were perceived as the most important management opportunities in the future.
Adsorption of H2S from hydrocarbon gas using doped bentonite: a molecular simulation study
Creators: name: Lasich, Matthew
Publisher: name: Mangosuthu University of Technology (MUT)
Year: 2022
Subjects: subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Organic Chemistry
subject: 30699 Physical Chemistry not elsewhere classified
subject: 90801 Food Chemistry and Molecular Gastronomy (excl. Wine)
subject: FOS: Other engineering and technologies
subject: 30799 Theoretical and Computational Chemistry not elsewhere classified

description: Hydrogen sulfide is a commonly occurring impurity in hydrocarbon gases such as natural gas or landfill gas. Apart from its toxicity, H2S can cause problems in downstream processing because of corrosion of piping in the presence of moisture. Removing this contaminant using a cost-effective and energy-efficient technique such as adsorption using commonly occurring adsorbents would be beneficial both for processing and refinement of hydrocarbon gases and for their use as an energy source. In this work, grand canonical Monte Carlo simulations were performed using an ab initio forcefield to predict adsorption isotherms for methane, hydrogen sulfide, and nitrogen in bentonite doped with K+, Li+, and Na+ cations with a view to aiding the development of low-cost pressure-swing adsorption systems for the targeted removal of H2S from landfill gas or natural gas. Pure species simulations were done, in addition to considering mixtures at conditions approximating real-world natural gas fields. Highly selective targeted adsorption of hydrogen sulfide was achieved for all three doped bentonites, with the adsorbed phase consisting of almost pure H2S, although the volume of gas adsorbed differed between adsorbents. The results suggest the following ranking for the three doped bentonite adsorbents in terms of their overall performance: K+ > Li+ > Na+. By considering both the composition of the adsorbed phase and the total quantity of adsorbed gas, there may be an interplay between the gas–gas and gas–solid interactions that becomes somewhat noticeable at low pressures.
Search for Pair Production of Light Scalar Top Quarks in p-pbar Collisions at sqrt{s}=1.8 TeV
Creators: name: Lundstedt, Carl
name: Claes, Dan
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using 85.2 +/- 3.6 pb^-1 of p-pbar collisions collected at sqrt(s)=1.8 TeV with the D0 detector at Fermilab's Tevatron Collider, we present the results of a search for direct pair production of scalar top quarks ~t, the supersymmetric partners of the top quark. We examined events containing two or more jets and missing transverse energy, the signature of light scalar top quark decays to charm quarks and neutralinos. After selections, we observe 27 events while expecting 31.1 +/- 6.4 events from known standard model processes. Comparing these results to next-to-leading-order production cross sections, we exclude a significant region of ~t and neutralino phase space. In particular, we exclude the ~t mass m_~t < 122 GeV/c^2 for a neutralino mass of 45 GeV/c^2.
description: 11 pages, 2 figures
RESEARCH NOTE: BEAN GRAIN CHARACTERISTICS AND PRICES PAID AT RETAIL MARKETS IN UGANDA: IMPLICATIONS FOR BEAN BREEDING.
Creators: name: Grisley, W.
name: Mwesigwa, D.
name: Grisley, W.
name: Mwesigwa, D.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Production Economics

description: Bean grain size and color characteristics are investigated to determine their effect on prices paid at consumer markets in Uganda. A price equation that include measures of these characteristics along with market location, grain supply, and marketing month variables is estimated for fresh (high moisture) and dry beans. Neither grain size nor color are found to have a significant impact on either fresh or dry bean prices. Bean breeders should thus not use grain color or size as important indicators of consumer preferences unless strong tradition indicates otherwise. Variation in market prices paid is more a function of market location and month of sale than characteristics of the grain.
title: Couple Relationships and Emotional Well-being After Severe Traumatic Brain Injury
Creators: name: Gosling, Jo
Publisher: name: The Open University
Year: 1996

description: A quantitative method complemented by a qualitative approach was used to explore couple relationships after traumatic brain injury (TBI). Eighteen couples where the male had sustained a severe head injury, who were in stable relationships before the injury, and still together at the time of the study, took part. The study focused on the reports and experiences of the women, between one and seven years after the injury; data was gathered in personal interviews. Significant differences were found between: the quality of the relationship before and after the injury, in the direction of deterioration of the relationship after injury, aspects of sexual satisfaction before and after injury, again in the direction of deterioration. Significant differences were also found between head injured mens' and womens' reports of aspects of marital state, with women reporting more problems than men. The more sexually coercive men were perceive to be, the lower the womens' ratings of sexual satisfaction; the less welcome head-injured mens’ sexual advances were, the more the women partners avoided sexual contact.

The qualitative component indicates that the women in the sample had coped with multiple losses and acquired extra responsibilities, leading to a high level of emotional distress and denial of feelings; many were ambivalent and confused about their partners' feelings for them. Commitment and companionship were cited as positive aspects of the relationship. The future was seen either with little change or not anticipated at all. Little formal support had been offered and most women said that thay would have liked individual help from services. Clinical implications and directions for future research are discussed.
VIEWPOINT: FUTURES CONTRACTS FOR AGRICULTURAL COMMODITIES - IS THE TIME RIPE FOR SOUTH AFRICA?
Termynkontrakte vir landboukommoditeite - Is die tyd ryp vir Suid-Afrika?
Creators: name: Van Der Vyver, Andre
name: Van Der Vyver, Andre
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
Political Economy

description: Arguing a case for or against a futures contract for an agricultural commodity in South Africa is made exceptionally difficult because of the lack of research and knowledge on the subject locally. This is further complicated because it involves different disciplines as well as a dependence on international experience. Nonetheless, there are certain requirements that are essential for the successful implementation of an agricultural contract. The most important are: A free market, liquidity, structure of the industry and price risk, followed by location, type of market operation, training and public relations, clearing house, product characteristics, international interaction and legislation. Based on these requirements there are at present certain commodities which are more suitable than others. They are wool, mohair, meat and potatoes. However, it will require more detailed analysis to accurately determine their potential.
The Impact of Modernity on Artistic Philanthropy in the Early 20th Century : A Case Study of Duncan Phillips and Albert Eugene Gallatin
Creators: name: Gorman, Jessica
name: Langa, Helen
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as thesis option
Objective-free excitation of quantum emitters with a laser-written micro parabolic mirror
Creators: name: Morozov, Sergii
name: Vezzoli, Stefano
name: Khan, Ali Hossain
name: Moreels, Iwan
name: Sapienza, Riccardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The efficient excitation of quantum sources such as quantum dots or single molecules requires high NA optics which is often a challenge in cryogenics, or in ultrafast optics. Here we propose a 3.2 um wide parabolic mirror, with a 0.8 um focal length, fabricated by direct laser writing on CdSe/CdS colloidal quantum dots, capable of focusing the excitation light to a sub-wavelength spot and to extract the generated emission by collimating it into a narrow beam. This mirror is fabricated via in-situ volumetric optical lithography, which can be aligned to individual emitters, and it can be easily adapted to other geometries beyond the paraboloid. This compact solid-state transducer from far-field to the emitter has important applications in objective-free quantum technologies.
Sororsenexa macalpinei Plant 2011, n.sp.
Creators: name: Plant, Adrian
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Empididae
Sororsenexa
Sororsenexa macalpinei

description: Sororsenexa macalpinei n.sp.
Figs 1–7
 Type material. HOLOTYPE ♂, AUSTRALIA: Royal National Park near Sydney, NSW, 13 Aug. 1971, D.K. McAlpine (Australian Museum). Paratypes 7♂♂, 8♀♀, same data as holotype: 3♂♂, 3♀♀, Calga, Hawkesbury Distr., NSW, 29.9.1956, D.K. McAlpine (9♂♂, 10♀♀, Australian Museum; 1♂, 1♀, National Museum of Wales).
 Description. Length 1.0– 1.1 mm (♂), 1.1–1.3 mm (♀); wing 1.3–1.4 mm. Head black rather thickly and uniformly covered with silvery grey dust. Male antenna yellow, postpedicel not contrasting with basal segments, stylus black. Female antenna darker, postpedicel blackish contrasting with somewhat paler basal segments. Mouthparts yellowish with apex of proboscis black. Setae brownish in male, blackish in female, rather paler on lower occiput near mouth cavity.
Thorax with ground colour of scutum and scutellum varying from dark yellow to almost black, generally paler in males but always heavily obscured by silvery grey dusting which in certain lights can appear blackish along median line or along line of dorsocentral setae on scutum; pleura somewhat paler and rather less strongly but uniformly dusted; all setae dark yellowish brown.
Legs yellow to yellowish brown, apical two segments of tarsi vaguely darker; all setae yellowish but front tibia with apical spine and front femur with ventral denticles and ventrobasal setae shining black.
Abdomen dark brown with similarly coloured or slightly paler setae; thinly but uniformly greyish dusted including hypandrium and epandrium. Subterminal segments progressively narrower than anterior segments in female, similarly sized in male.
Wings faintly tinged brownish yellow, veins yellow to yellowish brown, halter dirty yellow.
 Etymology. The specific name honours David McAlpine who has collected all known specimens of S. macalpinei.
 Comments. The precise collection localities we not recorded but the collector considers both known sites to have been a mixture of scattered eucalypts and sclerophyll heath. All specimens were taken in August or September which are cool months of the austral late winter and early spring.
description: Published as part of Plant, Adrian, 2011, Sororsenexa-New Genus (Diptera: Empididae: Hemerodromiinae) from Australia, pp. 267-272 in Records of the Australian Museum 63 (3) on pages 269-270, DOI: 10.3853/j.0067-1975.63.2011.1583, http://zenodo.org/record/4676688
DIE FINANSELE UITVOERBAARHEID VAN SPILPUNTBESPROEIING: DIE INAGNEMING VAN RISIKO MET BEHULP VAN KU1VIULATIEWE WAARSKYNLIKHEIDSVERDELINGS
Financial feasibility of centre pivot irrigation: Taking into consideration risk by using cumulative density functions
Creators: name: Meiring, J. A.
name: Oosthuizen, L. K.
name: Meiring, J. A.
name: Oosthuizen, L. K.
Publisher: name: Unknown
Year: 1994
Subjects: Financial Economics
Resource /Energy Economics and Policy
Risk and Uncertainty

description: The financial feasibility of six profitable centre pivot systems was evaluated by using cumulative density functions (CDFs) of crop prices and yields. CDFs do not only indicate all the outcomes but also the probability to realize a specific value of the performance measure. If the systems are fmanced over a period of 5 years, there is a probability of 70% for a cash flow deficit; this probability decreases to 35% with fmancing over ten years. The application of financial methods, bridging fmancing or adjusted production practises can be considered to ensure the fmancial feasibility of an investment. However reliable results can only be obtained if risks are taken into account as realisticly as possible in the analyses.
Chiral Logs in Quenched QCD
Creators: name: Chen, Y.
name: Dong, S. J.
name: Draper, T.
name: Horváth, I.
name: Lee, F. X.
name: Liu, K. F.
name: Mathur, N.
name: Zhang, J. B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The quenched chiral logs are examined on a $16^3 \times 28$ lattice with Iwasaki gauge action and overlap fermions. The pion decay constant $f_π$ is used to set the lattice spacing, $a = 0.200(3) {\rm fm}$. With pion mass as low as $\sim 180 {\rm MeV}$, we see the quenched chiral logs clearly in $m_π^2/m$ and $f_P$, the pseudoscalar decay constant. We analyze the data to determine how low the pion mass needs to be in order for the quenched one-loop chiral perturbation theory ($χ$PT) to apply. With the constrained curve-fitting method, we are able to extract the quenched chiral log parameter $δ$ together with other low-energy parameters. Only for $m_π \leq 300 {\rm MeV}$ do we obtain a consistent and stable fit with a constant $δ$ which we determine to be 0.24(3)(4) (at the chiral scale $Λ_χ=0.8 {\rm GeV}$). By comparing to the $12^3 \times 28$ lattice, we estimate the finite volume effect to be about 2.7% for the smallest pion mass. We also fitted the pion mass to the form for the re-summed cactus diagrams and found that its applicable region is extended farther than the range for the one-loop formula, perhaps up to $m_π \sim 500-600$ MeV. The scale independent $δ$ is determined to be 0.20(3) in this case. We study the quenched non-analytic terms in the nucleon mass and find that the coefficient $C_{1/2}$ in the nucleon mass is consistent with the prediction of one-loop $χ$PT\@. We also obtain the low energy constant $L_5$ from $f_π$. We conclude from this study that it is imperative to cover only the range of data with the pion mass less than $\sim 300 {\rm MeV}$ in order to examine the chiral behavior of the hadron masses and decay constants in quenched QCD and match them with quenched one-loop $χ$PT\@.
description: 37 pages and 24 figures, pion masses are fitted to the form for the re-summed cactus diagrams, figures added, to appear in PRD
Infrared Observations During the Secondary Eclipse of HD 209458 b II. Strong Limits on the Infrared Spectrum Near 2.2 Microns
Creators: name: Richardson, L. Jeremy
name: Deming, Drake
name: Seager, Sara
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report observations of the transiting extrasolar planet, HD 209458 b, designed to detect the secondary eclipse. We employ the method of `occultation spectroscopy', which searches in combined light (star and planet) for the disappearance and reappearance of weak infrared spectral features due to the planet as it passes behind the star and reappears. Our observations cover two predicted secondary eclipse events, and we obtained 1036 individual spectra of the HD 209458 system using the SpeX instrument at the NASA IRTF in September 2001. Our spectra extend from 1.9 to 4.2 microns with a spectral resolution of 1500. We have searched for a continuum peak near 2.2 microns (caused by CO and water absorption bands), as predicted by some models of the planetary atmosphere to be approximately 6E-4 of the stellar flux, but no such peak is detected at a level of about 3E-4 of the stellar flux. Our results represent the strongest limits on the infrared spectrum of the planet to date and carry significant implications for understanding the planetary atmosphere. In particular, some models that assume the stellar irradiation is re-radiated entirely on the sub-stellar hemisphere predict a flux peak inconsistent with our observations. Several physical mechanisms can improve agreement with our observations, including the re-distribution of heat by global circulation, a nearly isothermal atmosphere, and/or the presence of a high cloud.
description: Accepted to the Astrophysical Journal 17 pages, 6 figures
Invariant measures and global well posedness for SQG equation
Creators: name: Foldes, Juraj
name: Sy, Mouhamadou
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 35Q35, 76D03, 35R60, 60H15, 37C40

description: We construct an invariant measure $μ$ for the Surface Quasi-Geostrophic (SQG) equation and show that almost all functions in the support of $μ$ are initial conditions of global, unique solutions of SQG, that depend continuously on the initial data. In addition, we show that the support of $μ$ is infinite dimensional, meaning that it is not locally a subset of any compact set with finite Hausdorff dimension. Also, there are global solutions that have arbitrarily large initial condition. The measures $μ$ is obtained via fluctuation-dissipation method, that is, as a limit of invariant measures for stochastic SQG with a carefully chosen dissipation and random forcing.
description: 30 pages
USE OF INFORMATION AND COMPUTERS BY EASTERN CAPE DAIRY FARMERS
Gebruik van inligting en rekenaars deur Oos-Kaaplandse suiwelboere
Creators: name: Hildebrand, Q. L.
name: Ortmann, G. F.
name: Hildebrand, Q. L.
name: Ortmann, G. F.
Publisher: name: Unknown
Year: 1994
Subjects: Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies
Teaching/Communication/Extension/Profession

description: A survey conducted amongst 26 dairy farmers in the Eastern Cape was aimed at determining their sources and costs of information, and use of computers. Respondents spent an average of R1336 per year on information sources and rated financial consultants and own farm records highest for usefulness in decisions. A regression analysis revealed the following factors to be important in influencing the use of consultants: The farmers' perceived value of own farm records in production decisions; self-rating of management skills in overall farm management; computer use; degree of farm diversification; off-farm investment, and farmer's age. Of the respondents, 73.percent used computers in their farm business. Computers were rated as 'providing better information' and 'saved time' compared to 'hand' records. Preparing financial statements and farm planning were the most highly rated applications of the computer. A multivariate logit analysis suggested the following factors to have a significant impact on computer use: Self-rating of skills in financial management; debt-asset ratio of the business; rating of own farm records, and the relative willingness of the farmer to take risks.
An investigation into wheat paper
Creators: name: MacLean, Allister
name: Bae, Jae Yeong
name: Wan, Ting Hin
Publisher: name: The University of British Columbia
Year: 2014

description: UBC consumes nearly 50 million sheets of copy papers every year. While 30% recycled paper was used until today, Royal printers has proposed to supply seemingly more environment friendly wheat paper to UBC. In this report, environmental, economic, and social aspects of wheat paper and 30% recycled paper have been compared. The Carbon Footprint is one of the most important reasons why wheat paper is more sustainable than 30% recycled paper. The total carbon footprint of wheat production is actually lower than the wood production if carbon storage is taken into account. Cutting down trees would decrease the level of carbon storage and increase the rate of global warming. Economically, after analyzing the cost to the manufacturer, it is confirmed that they are making enough profit so that the price would not be raised afterwards. Also, buying from a developing country would support the global economy. Socially, switching to wheat paper will improve UBC’s reputation as a world leader in sustainability and pave the way for eventual Canadian production of this product. It will also introduce a potentially world changing technology to a continent which knows nothing about it. Considering the triple bottom line, switching the supplier to wheat paper would benefit the global environment, economy, and society. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
'N EVALUERING VAN WAARDASIEMETODES VIR DIE MOONTLIKE IMPLEMENTERING DAARVAN BY 'N LANDBOUGRONDBELASTING IN SUID-AFRIKA
An evaluation of the suitability of valuation methods for implementation in an agricultural land tax in South Africa
Creators: name: Kleynhans, T. E.
name: Lombard, J. P.
name: Kleynhans, T. E.
name: Lombard, J. P.
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
Land Economics/Use

description: It appears increasingly probable that an agricultural land tax will be introduced in South Africa on a regional basis. Policy makers should consider such aspects as the rate of taxation and the method-of calculating the taxable value of land. In order to treat such decisions on its merits, insight is needed into the productivity-generating attributes of agricultural land as well as into the extent to which the various valuation methods are able to estimate these different value components. Several criteria were identified and applied in the evaluation of three valuation methods for agricultural land. Special consideration was given to the possible implementation of an agricultural land tax on a regional level. Specific circumstances in each political region, for example the homogeneity of land, could result in valuation methods performing differently with respect to certain criteria. It could also be possible that in certain regions various valuation methods could be applied in a supplementary manner, provided that secondary data was available. Ultimately, whatever criteria are chosen, the important premise should still be that the valuation method must reflect satisfactorily the heterogeneity between and within regions.
Comment on "Accurate ground-state phase diagram of the one-dimensional extended Hubbard model at half filling"
Creators: name: Jeckelmann, Eric
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In PRB 68, 153101 (2003), Guoping Zhang presented density-matrix renormalization group (DMRG) results which contradict my DMRG calculations and Hirsch's quantum Monte Carlo (QMC) simulations for the charge-density-wave (CDW) phase boundary in the one-dimensional extended Hubbard model at half filling. In this Comment I show that Zhang's results are inaccurate and that his criticism of my work is groundless.
description: new QMC and DMRG results added
THE IDENTIFICATION OF FACTORS THAT INFLUENCE FARMERS' BUYING BEHAVIOUR OF NEW AGRICULTURAL TRACTORS
Creators: name: Bisschoff, C. A.
name: Marais, A. De K.
name: Van Reenen, M. J.
name: Bisschoff, C. A.
name: Marais, A. De K.
name: Van Reenen, M. J.
Publisher: name: Unknown
Year: 1994
Subjects: Farm Management
Research Methods/ Statistical Methods

description: The purchase of tractors by the participants in the various agricultural sectors continues to be problematic due to the high price of tractors and its accompanying implements. The purchase is thus a.. substantial capital investment in equipment that results in a thorough pre-purchase examination of the various alternatives and the choice of a manufacturer. Since the average age of agricultural tractors is constantly increasing, the probability of replacement purchases of tractors is also increasing. This scenario demanded a study in buying behaviour that examined what factors are deemed to be important by the buyers of tractors for agricultural use. Eight factors were identified by means of principle varimax factor analysis. These factors are: Product and service qualities, Operational qualities, Pre-purchase planning, After-sales service, Ergonomics, Ease of operation, Cost of credit and Potential savings. These factors declare a cumulative variance of 55,65 per cent. Three major groups could benefit from the results. First, the buyers of agricultural tractors since it could increase their level of understanding of the important considerations that are connected to the replacement of old tractors. Secondly, agricultural economists and advisors should be able to increase the quality of their advice if they have a better understanding of tractor buying behaviour. Thirdly, financial institutions may benefit by a more in-depth knowledge why a farmer applies for a loan to buy a new tractor.
Marcos de Termo das Comendas no Território de  Carrazeda de Ansiães
Creators: name: Rodolfo Manaia
Publisher: name: Revista Memória Rural
Year: 2023

description: Este artigo incide sobre marcos de termo, enquanto testemunhos materiais das delimitações geográficas das Comendas que ocupavam parcelas do atual território de Carrazeda de Ansiães.
Myopsalta Moulds 2012
Creators: name: Emery, Nathan J.
name: Emery, David L.
name: Popple, Lindsay W.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Myopsalta

description: Genus Myopsalta Moulds, 2012
 Diagnosis. As documented in Moulds (2012), with a single, minor extension to accommodate the two new taxa described herein, as follows: male genitalia: endotheca exposed, soft, entirely fleshy (with the exception of M. coolahensis sp.nov. and M. libritor sp.nov., which both possess a sclerotized endotheca).
description: Published as part of Emery, Nathan J., Emery, David L. & Popple, Lindsay W., 2015, Redescription of Myopsalta atrata (Goding and Froggatt) and Description of Two New Species of Myopsalta Moulds (Hemiptera: Cicadidae) from Central Western New South Wales, pp. 185-199 in Records of the Australian Museum 67 (6) on page 186, DOI: 10.3853/j.2201-4349.67.2015.1646, http://zenodo.org/record/4676702
Rembrandt's Women : Expressing the Polemic Doctrine of the Eucharist in the Flesh and Body of his Anti-Classical Nudes
Creators: name: Lowrie, Caitlin
name: Butler Wingfield, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Reexaming the ground state and magnetic properties of curium dioxide
Creators: name: Huang, Li
name: Chen, Ruofan
name: Lu, Haiyan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The ground state electronic structure and magnetic behaviors of curium dioxide (CmO$_{2}$) are controversial. In general, the formal valence of Cm ions in CmO$_{2}$ should be tetravalent. It implies a $5f^{6.0}$ electronic configuration and a non-magnetic ground state. However, it is in sharp contrast with the large magnetic moment measured by painstaking experiments. In order to clarify this contradiction, we tried to study the ground state electronic structure of CmO$_{2}$ by means of a combination of density functional theory and dynamical mean-field theory. We find that CmO$_{2}$ is a wide-gap charge transfer insulator with strong 5$f$ valence state fluctuation. It belongs to a mixed-valence compound indeed. The predominant electronic configurations for Cm ions are $5f^{6.0}$ and $5f^{7.0}$. The resulting magnetic moment agrees quite well with the experimental value. Therefore, the magnetic puzzle in CmO$_{2}$ can be appropriately explained by the mixed-valence scenario.
description: 9 pages, 6 figures
Development of a new mineral dust monitoring method incorporating genotoxicity assessment: an aid in cancer prevention
Creators: name: Pisaniello, Dino
Publisher: name: The University of Adelaide
Year: 2020
Subjects: subject: 111705 Environmental and Occupational Health and Safety
subject: FOS: Health sciences

description: The mechanisms of lung disease induced by inhalation of mineral dusts are only partly understood. Chemical oxidative stress has been strongly implicated in lung fibrosis and cancer. For example, it is thought that deposited asbestos fibres may lead to the formation of DNA-damaging oxygen radicals directly, or indirectly, by inducing an inflammatory reaction. If this oxidative stress mechanism is generally important, it is possible that a variety of minerals, not just asbestos, may be capable of catalysing the formation of free radicals and thereby cause lung damage.
This project addressed the issue of the surface catalytic formation of DNA-damaging radicals with regard to a range of locally extracted minerals. Using a laboratory assay, based on the hydroxylation of deoxyguanosine, it was found that all of the local mineral samples displayed a low reactivity, and nearly all displayed less reactivity than the asbestos reference minerals. Various experimental conditions were used, including different pHs, concentrations and buffer systems.
Delaroche's Domestic Bliss and Gender Complexities During the July Monarchy : Envisioning Depictions of Mothers, Wives, and Children as Social Reactions to Nineteenth-Century French Feminist Thought
Creators: name: Lowrie, Caitlin
name: Broude, Norma
Publisher: name: American University
Year: 2023

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
An investigation into phosphorus recovery technology
Creators: name: Yao, Andy
name: Han, Gavin
name: Fu, Robert
name: Chen, Benny
Publisher: name: The University of British Columbia
Year: 2014

description: This report investigates the available phosphorus recovery technologies for the UBC Farm new building centre in the form of Triple Bottom Line Assessment. The technology should be ideally low budget, low tech and sustainable, this means that it should be either zero net or positive. The main phosphorus recovery technologies investigated in this report are chemical precipitation, struvite precipitation, and the Pearl Process. Other technologies exist and are briefly mentioned in the report. Ecologically, building a phosphorus recovery technology can eliminate the excess phosphorus that is sent to the ocean by the wastewater created from human and livestock excrement. Economically, a phosphorus recovery plant overall is quite feasible taking into account the long run at looking at things. It is concluded that it would be economically feasible to construct a wastewater treatment plant first than add a phosphorus recovery process to it in the future. Socially, implementing a phosphorus recovery technology onto a small scale like the UBC Farm can set an example for larger scale applications like the municipal wastewater treatment plant. This in the long run can solve the society’s phosphorus scarcity problem that the world is facing. In conclusion, phosphorus recovery technology is economically, socially and ecologically viable option for the UBC Farm building centre. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Delaroche's Domestic Bliss and Gender Complexities During the July Monarchy : Envisioning Depictions of Mothers, Wives, and Children as Social Reactions to Nineteenth-Century French Feminist Thought
Creators: name: Lowrie, Caitlin
name: Broude, Norma
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Development of a new mineral dust monitoring method incorporating genotoxicity assessment: field measurements
Creators: name: Pisaniello, Dino
Publisher: name: The University of Adelaide
Year: 2020
Subjects: subject: 111705 Environmental and Occupational Health and Safety
subject: FOS: Health sciences

description: This project sought to investigate the surface reactivities of a wide range of minerals extracted from South Australian mines and quarries. Conventional occupational hygiene dust sampling methods were combined with a laboratory assay which measures the production of DNA-damaging hydroxyl radicals. A standard set of laboratory analytical conditions were established, and in this way the relative reactivities of airborne and bulk dust samples were compared.
The Androgyne Hero(ine) : The Gendering of Style, Motion, and Grazia in the depiction of ideal bodies in Italy around 1512.
Creators: name: Pinzarrone, Ellie
name: Butler Wingfield, Kim
Publisher: name: American University
Year: 2023

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
The Androgyne Hero(ine) : The Gendering of Style, Motion, and Grazia in the depiction of ideal bodies in Italy around 1512.
Creators: name: Pinzarrone, Ellie
name: Butler Wingfield, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
The feasible region for consecutive patterns of permutations is a cycle polytope
Creators: name: Borga, Jacopo
name: Penaguiao, Raul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We study proportions of consecutive occurrences of permutations of a given size. Specifically, the feasible limits of such proportions on large permutations form a region, called feasible region. We show that this feasible region is a polytope, more precisely the cycle polytope of a specific graph called overlap graph. This allows us to compute the dimension, vertices and faces of the polytope. Finally, we prove that the limits of classical occurrences and consecutive occurrences are independent, in some sense made precise in the extended abstract. As a consequence, the scaling limit of a sequence of permutations induces no constraints on the local limit and vice versa.
description: New version including referee's corrections. This is an extended abstract of arXiv:1910.02233 for FPSAC 2020 (accepted for publication in a proceedings volume of S\'eminaire Lotharingien Combinatoire)
Reading the allegorical impulse on display : Artists and museums 1987-1992
Creators: name: Tuohy, Patricia
name: Langa, Helen
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Australlus Worthy 2011, new genus
Creators: name: Worthy, Trevor H.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Gruiformes
Rallidae
Australlus

description: Genus Australlus new genus
 Type species. Gallinula disneyi Boles, 2005.
 Etymology. From australis, Latin, southern, and as it relates to Australia; and rallus, Latin, name of rails.
 Diagnosis. Differs from other genera of the Rallidae by the following unique combination of characters. Humerus with 1), crus dorsale fossae very robust; 2), tuber. ventrale relatively robust and dorsoventrally wide, with an autapomorphic arrangement of the similar sized insertion scars for the three ligaments arranged in an equilateral triangle, with that for the lig. m. coracobrachialis caudalis largest, ovate and occupying the caudal tip of the tuberculum, the scar for lig. m. subscapularis on the dorsal facies distinctly cranial to that for the lig. m. coracobrachialis caudalis and the scar for the lig. m. subcoracoideus on the ventral facies level with, but slightly cranial to, the scar for lig. m. coracobrachialis caudalis and only slightly smaller; 3), tuber. supracondylare ventrale relatively small and not extending proximally as far as condylus dorsalis; 4) and proc. flexorius projecting greatly ventrally. Coracoid, 5), with a prominent crista procoracoidei extending from the proc. procoracoideus to close to the crista medialis. Tarsometatarsus, 6), elongate, about 1.5 times the femoral length; 7), with crista medialis hypotarsi elongate, extending more than half the length of the hypotarsus; and 8), enclosing two hypotarsal canals, one for the tendon for M. flexor digitorum longus (canal 1) and the more plantar one (canal 2) that carried the two tendons, M. flexor perforatus digiti II and M. flexor perforans et perforatus digiti II.
 Stratigraphy and age. All specimens of Australlus disneyi derive from sites of Faunal Zone A and B, except QM F20799 from Ringtail Site, which is attributed to Faunal Zone C (Travouillon et al., 2006), and therefore is presumed to be of Middle Miocene age. QM F20799 does not differ materially from the other specimens of A. disneyi and is of similar size (Boles, 2005a), so there is no reason to doubt its identity. However, its preservation is unlike the other two specimens from Ringtail and similar to specimens from White Hunter Site, so perhaps its site of origin is incorrectly recorded.
description: Published as part of Worthy, Trevor H., 2011, Australlus, a New Genus for Gallinula disneyi (Aves: Rallidae) and a Description of a New Species from Oligo-Miocene Deposits at Riversleigh, Northwestern Queensland, Australia, pp. 61-77 in Records of the Australian Museum 63 (1) on page 64, DOI: 10.3853/j.0067-1975.63.2011.1563, http://zenodo.org/record/4676653
Large area and low cost metasurfaces
Creators: name: Garcia-Pomar, Juan Luis
Publisher: name: Zenodo
Year: 2020
Subjects: nanoimprint
lithography

description: Initial talk with transfer of knowledge of the ER to the host group about: Nanoscale fabrication methods with high resolution and yielding large area patterns have been
 a prominent research area in the recent years due to its crucial role in the implementation of
 nanosized devices in various applications. Soft nanoimprinting lithography is an easy and
 scalable fabrication technique that allows seamless integration of photonic nanostructures in
 many optoelectronic fabrication procedures. In this talk, we will discuss the response of these
 metasurfaces that have been fabricated using soft nanoimprinting. These photonic
 architectures are exceptionally interesting due to their ability to support strong collective
 lattice resonances arising from the coherent multiple scattering enabled by the array
 periodicity. Thanks to these exceptional properties, periodic arrays can be exploited in a wide
 variety of applications, including ultrasensitive biosensing, nanoscale light emission, and
 broadband absorption. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 840064
Proximity-Induced Odd-Frequency Superconductivity in a Topological Insulator
Creators: name: Krieger, Jonas A.
name: Pertsova, Anna
name: Giblin, Sean R.
name: Döbeli, Max
name: Prokscha, Thomas
name: Schneider, Christof W.
name: Suter, Andreas
name: Hesjedal, Thorsten
name: Balatsky, Alexander V.
name: Salman, Zaher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: At an interface between a topological insulator (TI) and a conventional superconductor (SC), superconductivity has been predicted to change dramatically and exhibit novel correlations. In particular, the induced superconductivity by an $s$-wave SC in a TI can develop an order parameter with a $p$-wave component. Here we present experimental evidence for an unexpected proximity-induced novel superconducting state in a thin layer of the prototypical TI, Bi$_2$Se$_3$, proximity coupled to Nb. From depth-resolved magnetic field measurements below the superconducting transition temperature of Nb, we observe a local enhancement of the magnetic field in Bi$_2$Se$_3$ that exceeds the externally applied field, thus supporting the existence of an intrinsic paramagnetic Meissner effect arising from an odd-frequency superconducting state. Our experimental results are complemented by theoretical calculations supporting the appearance of such a component at the interface which extends into the TI. This state is topologically distinct from the conventional Bardeen-Cooper-Schrieffer state it originates from. To the best of our knowledge, these findings present a first observation of bulk odd-frequency superconductivity in a TI. We thus reaffirm the potential of the TI-SC interface as a versatile platform to produce novel superconducting states.
description: Accepted version for publication in Physical Review Letters
A Short Lecture on Topological Crystallography and a Discrete Surface Theory
Creators: name: Naito, Hisashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This is an unrefereed lecture note based on lectures in 'Introductory Workshop on Discrete Differential Geometry' at Korea University on January 21--24, 2019. In this note, we discuss topological crystallography, which is a mathematical theory of crystal structures. The most symmetric structure among all placements of the graph is obtained by a variational principle in topological crystallography. We also discuss a theory of trivalent discrete surfaces in $3$-dimensional Euclidean space, which are mathematical models of crystal/molecular structures.
description: 44 pages, 38 figures, and 1 table. available at http://math.korea.ac.kr/_res/math/etc/AnamLectureNotesVol2_20200210.pdf
Adwokat dr Piotr Sobanski Zielona Gora SARS-CoV-2 COVID-19.pdf
Creators: name: Adwokat Piotr Sobanski
Publisher: name: figshare
Year: 2020
Subjects: Education

description: W artykule została przedstawiona kwestia możliwości skorzystania przez strony umowy cywilnoprawnej z klauzuli rebus sic stantibus, tj. sądowego oznaczenia sposobu wykonania zobowiązania, dokonania zmiany wysokość świadczenia lub orzeczenia o rozwiązaniu umowy. Możliwość skorzystania z instytucji uregulowanej w art. 357(1) § 1 KC jest dziś szczególnie istotna z uwagi na konsekwencje epidemiikoronawirusa SARS-CoV-2. adwokat Piotr Sobanski Zielona Gora piotr.sobanski@adwokatura.pl