cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Conformal symmetries and integrals of the motion in pp waves with external electromagnetic fields
Creators: name: Andrzejewski, K.
name: Dimakis, N.
name: Elbistan, M.
name: Horvathy, P. A.
name: Kosinski, P.
name: Zhang, P. -M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The integrals of the motion associated with conformal Killing vectors of a curved space-time with an additional electromagnetic background are studied for massive particles. They involve a new term which might be non-local. The difficulty disappears for pp-waves, for which explicit, local conserved charges are found. Alternatively, the mass can be taken into account by "distorting" the conformal Killing vectors. The relation of these non-point symmetries to the charges is analysed both in the Lagrangian and Hamiltonian approaches, as well as in the framework of Eisenhart-Duval lift.
description: Published as Annals of Physics 418 (2020) 168180. 39 pages, 1 figure
FINANCIAL FEASIBILITY ANALYSIS OF ALTERNATIVE CROP ROTATION SYSTEMS UNDER CENTER PIVOT IRRIGATION IN THE SOUTHERN FREE STATE AREA CONSIDERING PRICE, PRODUCTION AND FINANCIAL RISKS
'n Ontleding van die finansiele uitvoerbaarheid van alternatiewe gewaswisselboustelsels onder spilpuntbesproeiing in die Suid-Vrystaat substreek met inagneming van prys-, produksie- en finansiele risiko
Creators: name: Den Braanker, J. P. D.
name: Meiring, J. A.
name: Oosthuizen, L. K.
name: Den Braanker, J. P. D.
name: Meiring, J. A.
name: Oosthuizen, L. K.
Publisher: name: Unknown
Year: 1991
Subjects: Crop Production/Industries
Production Economics
Risk and Uncertainty

description: Fourteen typical crop rotation systems were evaluated over a period of 10 years. The irrigation systems were used to irrigate 60 ha of sandy soils. Various degrees of double cropping were considered. A procedure was followed to generate distributions of prices for the relevant crops. The crop yield distributions were generated by the PUTU-simulation model. The annual after-tax cash flow was calculated for the different crop rotation systems for each year of the ten year period for two static pumping heights and three different equity ratios. The results indicate that all crop rotation systems are infeasible for a 30/70 equity ratio for positive pumping heights. For a 80/20 equity ratio 14 crop rotation systems are feasible.
The prevalence of different symptoms in adults infected by the novel coronavirus (SARS-CoV-2; covid-19): A systematic review and meta-analysis protocol
Creators: name: Grant, Michael
name: Geoghegan, Luke
name: McGuiness, Luke
name: Clarke, Emily
name: Ryckie Wade
Publisher: name: figshare
Year: 2020
Subjects: subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Protocol
'n SUID-AFRIKAANSE HULPBRONKWALITEIT INDEKS
Creators: name: Van Schalkwyk, H. D.
name: Groenewald, J. A.
name: Van Schalkwyk, H. D.
name: Groenewald, J. A.
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural and Food Policy
Productivity Analysis
Resource /Energy Economics and Policy

description: Measurement of natural resource quality is useful for objectives such as macro production analysis, decisions regarding goverment capital expenditure and agricultural aid programs. Land prices can serve as indicator. Land prices are however influenced by external factors as well as quality of the land. The role of external factors, such as the use or expected use of land for non-agricultural purposes, goverment aid programs and monetary conditions must thus be eliminated so that land prices can be used as barometer of resource quality. A similar study was done in the USA with states as observation units. International indexes with countries as observation units were calculated in another study. In this paper a South African resource quality index with statistical regions as observation units is presented. Good statistical fits were obtained. The following factors contributed significantly to the determination of resource quality indexes: stability of rainfall, irrigation and percentage of land under natural pasture. Change occurs over time. The indexes obtained vary between 53 (Namaqualand) and 239 (Western province fruit region).
DIE BEPALING VAN ENKELE EKONOMIESE WAARDES VIR INSLUITING IN VERVANGINGSBESLUITNEMINGSONDERSTEUNINGSMODELLE
Creators: name: Coetzee, K.
name: Viljoen, M. F.
name: Coetzee, K.
name: Viljoen, M. F.
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural Finance
Research Methods/ Statistical Methods

description: Replacement decisions are influenced by various factors. Empirical values for some of these factors were determined. It was found that replacement costs can be forecasted with an irregular curve, while trade-in sales can be determined with a regression function based on new cost price, age and tractor power.
Life cycle assessment report : Chemistry building UBC
Creators: name: Jarolim, Adam
Publisher: name: The University of British Columbia
Year: 2014

description: This life cycle assessment of the Chemistry building at the University of British Columbia is an study to analyze environmental impacts. The information gathered in this study will be used to make future sustainable decisions at UBC. The scope of this study only includes the manufacturing and construction phases, also known as Cradle-to-gate analysis. OnScreen takeoff and Athena's Impact Estimator were used to model and catalogue the materials and impacts from the Chemistry building. An output from the Impact Estimator is the bill of materials, which encompasses all the material quantities. The environmental effects of the materials are then studied to determine what impacts the Chemistry building had during it's initial life stages. A sensitivity analysis was also performed to understand what effect each of the top five most used materials individually have on the environment. This analysis highlights which materials should be switch for alternatives in order to mitigate environmental impacts. Lastly a building performance model was used to investigate what effects improving the building's envelope would have. This model compares the current envelope system to a system that meets a UBC standard and investigates how long the building would have to be in operation to see a return on the initial building envelope improvements. 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.”
A note on Laguerre original ODEs and Polynomials
Creators: name: Hassani, Mohamed Elmansour
Publisher: name: figshare
Year: 2020
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description:
: In the present note a critical discussion of two ODEs and two polynomials that have been wrongly attributed to the French mathematician Edmond Nicolas Laguerre (1834-1886) is provided. It is shown that Laguerre had nothing to do with such a wrong attribution and the actual discoverer was the Russian mathematician Nikolay Yacovlevich Sonine (1849-1915).
Cassava peels: From waste to good quality livestock feed
Creators: name: TAAT Program
Publisher: name: Gates Open Research
Year: 2024

description: Cassava is a major subsistence and commercial crop in sub-Saharan  Africa. Africa produces about  178 million metric tonnes of cassava annually, feeding more than 50 million people. Processing cassava into food requires peeling the cassava root,  which generates about  25% of waste peels, or the equivalent of ~45 million tonnes of waste annually in Africa. Transforming this waste into livestock feed through the High-Quality Cassava Peels (HQCP) mash innovation has the potential to turn approximately 45 million tons of wet peels into 11.2 million tons of feed ingredients, capable of replacing approximately 7.3 million tons of imported maize, valued at 3.036 million dollars.
Nonmagnetic impurity effects in MgB$_{2}$
Creators: name: Watanabe, Koichi
name: Kita, Takafumi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study nonmagnetic impurity effects in MgB$_{2}$ using the quasiclassical equations of superconductivity for a weak-coupling two-band model. Parameters in the model are fixed so as to reproduce experiments on MgB$_{2}$ as closely as possible. The quasiparticle density of states and the specific heat are calculated for various values of the interband impurity scattering. The density of states changes gradually from a two-gap structure into the conventional single-gap structure as the interband scattering increases. It is found that the excitation threshold is not a monotonic function of the interband scattering. Calculated results for the specific heat are in good agreements with experiments on samples after irradiation.
Using nanopore sequencing in Parkinson's disease (GBA)
Creators: name: Proukakis, Christos
name: Toffoli, Marco
Publisher: name: Zenodo
Year: 2022
Subjects: GBA
long read sequencing
structural variants

description: The GBA gene is important in PD, but analysis is complex due to the nearby pseudogene, and variants arising by recombination are frequently missed. We present two complementary methods to resolve all variants: targeted long read (Nanopore) sequencing, and Gauchian, an algorithm for dedicated analysis of short read (Illumina) whole genome sequencing. We used PPMI samples to validate Gauchian findings in existing WGS data from AMP-PD. We noted some errors in the AMP-PD analysis, which we discuss in detail in our paper https://www.medrxiv.org/content/10.1101/2021.11.12.21266253v1
Life cycle assessment of the Hebb Building
Creators: name: Ferma, Kristen
Publisher: name: The University of British Columbia
Year: 2014

description: The life cycle assessment of the University of British Columbia (UBC) Hebb Building, a reinforced concrete structure constructed in 1964 and consisting of a tower and a theatre, was performed as an exploratory study to determine the environmental impact of its design. This LCA of the Hebb Building is also part of a series of twenty-nine others being carried out simultaneously on respective buildings at UBC to establish the possibility of carrying out environmental performance comparisons across UBC buildings over time and between different materials, structural types and building functions. The Hebb Building was modeled using OnCenter’s On-Screen Takeoff and Athena Sustainable Materials Institute’s Impact Estimator (IE) to attain the Bill of Materials and Summary Measures. The Bill of Materials obtained shows that the five most significant materials of the Hebb Building are ballast, concrete, extruded polystyrene, Ontario brick, and rebar. The Summary Measures lists the effects of the eight impact categories during the manufacturing and construction phases, and it was observed that the primary energy consumption and weighted resource use of the Hebb Building were most significant, while the ozone depletion and eutrophication potential are quite minimal. Performing sensitivity analyses on five substantial materials present in the building and examining their affects on each of the impact categories relative to the total building impact shows that a 10% increase in the amount of concrete has the most considerable effect on each of the impact categories. Lastly, through building performance modeling, it was determined that by upgrading the current insulation and window type of 1” extruded polystyrene and standard glazing to 2.5” foam polyisocyanurate and low E silver argon filled glazing, the Hebb Building’s energy performance can be significantly improved over its service life. An energy payback period of 0.6 years was found for the improved Hebb Building. 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.”
High-speed KATAN Ciphers on-a-Chip
Creators: name: Qatan, Fatma
name: Damaj, Issam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences
subject: B.4.4; B.5.1; B.5.2; B.6.3

description: Security in embedded systems has become a main requirement in modern electronic devices. The demand for low-cost and highly secure cryptographic algorithms is increasingly growing in fields such as mobile telecommunications, handheld devices, etc. In this paper, we analyze and evaluate the development of cheap and relatively fast hardware implementations of the KATAN family of block ciphers. KATAN is a family of six hardware oriented block ciphers. All KATAN ciphers share an 80-bit key and have 32, 48, or 64-bit blocks. We use VHDL under Altera Quartus in conjunction with ModelSim to implement and analyze our hardware designs. The developed designs are mapped onto high-performance Field Programmable Gate Arrays. We compare our findings with similar hardware implementations and C software versions of the algorithms. The performance analysis of the C implementations is done using Intel Vtune Amplifier running on Dell precision T7500 with its dual quad-core Xeon processor and 24 GB of RAM. The obtained results show better performance when compared with existing hardware and software implementations.
description: 6 pages, 8 figures, 5 tables
Quantum Nonlinear Sigma Model for Arbitrary Spin Heisenberg Antiferromagnets
Creators: name: Dai, Jianhui
name: Zhang, Wei-Min
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this Letter, we derive a quantum nonlinear sigma model (QNLSM) for quantum Heisenberg antiferromagnets (QHA) with arbitrary S (spin) values. A upper limit of the low temperature is naturally carried out for the reliability of the QNLSM. The S dependence of the effective coupling constant and the spin wave velocity in the QNLSM are also obtained explicitly. The resulting spin wave velocity for 2-dim spin-1/2 QHA highly concurs with the experimental data of high $T_c$ compound La2CuO4. The predicted correlation lengths for 2d QHA and spin-gap magnitudes for 1d QHA also agrees with the accurate numerical results.
description: 4 pages, 1 figure, minor revision of the text
FACTOR IDENTIFICATION - AN ANALYSIS OF BUYER BEHAVIOUR DURING THE ACQUISITION OF AN ADVANCED MECHANIZED IRRIGATION SYSTEM
Creators: name: Bisschoff, C. A.
name: De K. Marais, A.
name: Bisschoff, C. A.
name: De K. Marais, A.
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural and Food Policy
Farm Management
Research and Development/Tech Change/Emerging Technologies

description: The article deals with consumer (farming) purchasing behaviour in the advanced mechanized irrigation industry. The consumer decisionmaking model by Engel-Kollat-Blackwell was used as a basis for the theoretical research, and principal factor analysis was the statistical technique employed to analyse the data. Ten factors (explaining an extremely high cumulative variance of 96.8 per cent) were identified from the rotated factor matrix, and ranked in order of importance. The first five factors, which is considered to be the most important factors (explaining a cumulative variance of 71.1 per cent) were labelled as "Financial planning", "Managerial aspects", "Environmental concerns", "Design aspects" and "Production potential". The five factors which is regarded as not so important were labelled "Return on investment", "Operational qualities", "Dealer orientation", "Service qualities" and "Past experience". Three major groups could benefit greatly from understanding buying behaviour within the advanced mechanized irrigation industry. Firstly, agricultural economists, financial institutions and other-advice rendering institutions would be able to increase the quality of their services to potential buyers (farmers). Secondly, farmers would be able to identify the pitfalls within their own reasoning when they consider the acquisition of an advanced mechanized irrigation system, while thirdly, the marketers of these systems would be able to increase the productivity of their sales personnel if they concentrate their sales activities on the more important criteria identified within this article.
Didemnum albopunctatum Sluiter 1909
Creators: name: Kott, Patricia
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Enterogona
Didemnidae
Didemnum
Didemnum albopunctatum

description: Didemnum albopunctatum Sluiter, 1909
 Didemnum albopunctatum Sluiter, 1909: 58; Kott, 2001: 148 and synonymy.
 Distribution. New record: Western Australia (Rowley Shoals, WAM182.93). Previously recorded (see Kott, 2001): Queensland, Indonesia, Palau Is, New Caledonia.
 Description. Flat encrusting sheet, which, in preservative, has minute dark zooids showing through evenly spaced stellate branchial apertures, their margins outlined in white spicules. Sessile, white-rimmed common cloacal openings are evenly spaced over the surface. Globular spicules to 0.06 mm are crowded throughout. The common cloacal cavity is thoracic.
 Remarks. The dark-coloured zooids have been recorded previously in specimens from the Swain Reefs (Kott, 2001). This is the first record of this species from NW Australia.
description: Published as part of Kott, Patricia, 2004, New and little-known species of Didemnidae (Ascidiacea, Tunicata) from Australia (part I), pp. 731-774 in Journal of Natural History 38 (19) on page 747, DOI: 10.1080/00222930310001647334, http://zenodo.org/record/4653689
title: A Store Manager's Account of His Company Strategy: A Pilot Study
Creators: name: Elbasha, Tamim
Publisher: name: The Open University
Year: 2011

description: A growing number of scholars in the strategic management field adopt a humanised approach to research via studying strategists and their strategising activities. However, most research is still centred on middle and top management. The pilot study described here illustrates the importance of looking at strategising among first line managers who are becoming increasingly active strategists in certain modern organisational structures. Besides serving as a pilot study for future piece of research, this study attempts to explore how a retail outlet manager perceived his organisational strategy. It also looks at the connection between some of his daily activities and the company’s strategy. This was achieved with a single case study design and analysis of data set produced from observing weekly meetings and interviewing the manager. This pilot study indicates that the store manager sees two strategies within his organisations - an overall strategy and a localised version of that strategy. Further, he is unaware of his strategic agency and that communication is an important part of strategising. These findings support the need for more studies on strategists and strategising activities and confirm the rationale for conducting a full-scale research using a comparative case study approach.
THE DEMAND FOR AND SUPPLY OF SOUTH AFRICAN DECIDUOUS FRUIT EXPORTS : A DYNAMIC ANALYSIS
Creators: name: Cleasby, R. C. G.
name: Darroch, M. A. G.
name: Dushmanitch, V. Y.
name: Cleasby, R. C. G.
name: Darroch, M. A. G.
name: Dushmanitch, V. Y.
Publisher: name: Unknown
Year: 1991
Subjects: Crop Production/Industries
Demand and Price Analysis

description: This paper is the first empirical study of the factors affecting the demand for and supply of South African deciduous fruit exports. A simultaneous equations model of deciduous fruit export demand and supply was specified and estimated by Two Stage Least Squares using annual data for the period 1960 - 1990. Export demand was influenced by the world price (real) of deciduous fruit and real income of importing countries. Export supply was explained by the lagged relative price of deciduous fruit exports (ratio of net export realisation price to domestic price), lagged exports and random shocks in deciduous fruit supply (deviation of actual production from trend). Estimated price and income elasticities of export demand were high (-28.00 and 1.41 respectively). Export supply in the short run was price inelastic (0.07) and relatively less responsive to supply shocks. These results support a priori expectations that local deciduous fruit exporters are price takers and that export supply reacts sluggishly to changes in the relative price of exports. Real income growth in importing countries will markedly influence export performance.
Two-Loop QCD-EW Master Integrals for Z Plus Jet Production at Large Transverse Momentum
Creators: name: Frellesvig, Hjalte
name: Kudashkin, Kirill
name: Wever, Christopher
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The production of electroweak $Z$ bosons that decay to neutrinos and recoil against jets with large transverse momentum $p_\perp$ is an important background process to searches for dark matter at the Large Hadron Collider (LHC). To fully benefit from opportunities offered by the future high-luminosity LHC, the theoretical description of the $pp \to Z+j$ process should be extended to include mixed QCD-electroweak corrections. The goal of this paper is to initiate the computation of such corrections starting with the calculation of the Feynman integrals needed to describe two-loop QCD-electroweak contributions to $q \bar q \to Z+g$ scattering amplitudes. Making use of the hierarchy between the large transverse momenta of the recoiling jet, relevant for heavy dark matter searches, and the $Z$ boson mass $m_{Z}$, we present the relevant master integrals as a series expansion in $m_{Z}/p_\perp$.
description: 23 pages, 5 figures, analytical results included as ancillary files
'N KRITIESE BESKOUING VAN DIE PRODUSENTE SUBSIDIE EKWIVALENT AS MEETINSTRUMENT TYDENS AOTHONDERHANDELINGE
Creators: name: Van Heerden, W. R.
name: Van Zyl, J.
name: Van Heerden, W. R.
name: Van Zyl, J.
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural and Food Policy
Agricultural Finance

description: A PSE is the subsidy that would be necessary to replace the array of actual farm policies employed in a particular country in order to leave farm income unchanged. Transfers from the government or consumers to farmers happen either through direct payments from the budget or through market price support. Market price support is calculated by comparing an internal producer price to a world reference price. Direct transfers from the budget are calculated from the national budget. However, there are a number of elements in the calculation of the market price support which need to be addressed before the PSE could be used as a negotiating tool in the GATT negotiations.
A oferta de informações sobre governança na Biblioteca Digital do Instituto do Patrimônio Histórico e Artístico Nacional
Creators: name: Mártires Pinto, Elton
name: de Jesus Pereira, Fernando
name: Shintaku, Milton
name: Torres Schiessl, Ingrid
name: Macedo, Diego José
name: Souza Ferreira Costa, Mirele Carolina
name: Silveira, Lucas Ângelo
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão “O meu Póster em 1 minuto”, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
POWER INDICES AND PROBABILISTIC VOTING ASSUMPTIONS
Creators: name: Leech, Dennis
name: Leech, Dennis
Publisher: name: Unknown
Year: 1989
Subjects: Labor and Human Capital
Political Economy

description: This paper compares the theoretical bases of the Shapley-Shubik and Banzhaf indices of voting power for a legislature with weighted voting. Definitions based on probabilistic-voting assumptions, useful both as behavioral descriptions and for computation in empirical applications, are compared in terms of necessary and sufficient conditions on the choice of voting probabilities. It is shown that the Shapley-Shubik index requires stronger conditions than the Banzhaf index: the former that voting probabilities be chosen by all players from a common uniform distribution on the unit interval, the latter only that voting probabilities be selected independently from any set of distributions (on the unit interval) which have a common mean of 1/2. This result has a bearing on the theoretical criteria by which one may choose between the two indices in a voting context.
Electronic compressibility and charge imbalance relaxation in cuprate superconductors
Creators: name: Helm, Ch.
name: Bulaevskii, L. N.
name: Ryndyk, D. A.
name: Keller, J.
name: Rother, S.
name: Koval, Y.
name: Müller, P.
name: Kleiner, R.
Publisher: name: arXiv
Year: 2003
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: In the material SmLa$_{1-x}$Sr$_x$CuO$_{4-δ}$ with alternating intrinsic Josephson junctions we explain theoretically the relative amplitude of the two plasma peaks in transmission by taking into account the spatial dispersion of the Josephson Plasma Resonance in $c$ direction due to charge coupling. From this and the magnetic field dependence of the plasma peaks in the vortex solid and liquid states it is shown that the electronic compressibility of the CuO$_2$ layers is consistent with a free electron value. Also the London penetration depth $λ_{ab} \approx 1100 {\rm Å}$ near $T_c$ can be determined. The voltage response in the $IV$-curve of a Bi$_2$Sr$_2$CaCu$_2$O$_8$ mesa due to microwave irradiation or current injection in a second mesa is related to the nonequilibrium charge imbalance of quasiparticles and Cooper pairs and from our experimental data the relaxation time $\sim 100 {\rm ps}$ is obtained.
description: 2 pages, 2 figures, phc-proc4-auth.cls, to be published in Physica C as a proceeding of M2S-HTSC Rio 2003
Metrics of nonpositive curvature on graph-manifolds and electromagnetic fields on graphs
Creators: name: Buyalo, Sergei
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A 3-dimensional graph-manifold is composed from simple blocks which are products of compact surfaces with boundary by the circle. Its global structure may be as complicated as one likes and is described by a graph which might be an arbitrary graph. A metric of nonpositive curvature on such a manifold, if it exists, can be described essentially by a finite number of parameters which satisfy a geometrization equation. The aim of the work is to show that this equation is a discrete version of the Maxwell equations of classical electrodynamics, and its solutions, i.e., metrics of nonpositive curvature, are critical configurations of the same sort of action which describes the interaction of an electromagnetic field with a scalar charged field. We establish this analogy in the framework of the spectral calculus (noncommutative geometry) of A. Connes.
description: 39 pages
Ehrenfest relations and magnetoelastic effects in field-induced ordered phases
Creators: name: Matsumoto, Masashige
name: Sigrist, Manfred
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetoelastic properties in field-induced magnetic ordered phases are studied theoretically based on a Ginzburg-Landau theory. A critical field for the field-induced ordered phase is obtained as a function of temperature and pressure, which determine the phase diagram. It is found that magnetic field dependence of elastic constant decreases discontinuously at the critical field, Hc, and that it decreases linearly with field in the ordered phase (H>Hc). We found an Ehrenfest relation between the field dependence of the elastic constant and the pressure dependence of critical field. Our theory provides the theoretical form for magnetoelastic properties in field- and pressure-induced ordered phases.
description: 7 pages, 3 figures
title: Unravelling the Genetic Bases of Hearing Loss: Functional Characterisation of Pathogenic Variants and Novel Candidate Genes Identified by Whole-Exome Sequencing
Creators: name: Chiereghin, Chiara
Publisher: name: The Open University
Year: 2019

description: Hearing Loss (HL) is the most common sensory disorder in humans, and more than half of cases are due to genetic factors. In 30% of cases, hereditary HL is associated with additional clinical features, and it is defined syndromic (SHL), whereas in 70% of cases HL is the only symptom, and it is considered nonsyndromic (NSHL). HL is characterised by an extreme genetic heterogeneity, with more than 150 loci currently associated and at least 100 genes identified, making extremely challenging to obtain a molecular diagnosis with traditional screening methods. For these reasons, whole-exome sequencing (WES) has been introduced to search for mutations and novel genes underlying the disease.

 In this frame, this thesis describes the study of the genetic bases of deafness in 11 HL (3 SHL and 8 NSHL) families applying WES and an accurate functional validation of the candidate mutations. This approach allowed the identification of the causative mutations in 7 out of the 11 families analysed, while for 3 NSHL families no strong candidate pathogenic variants emerged from our WES data analyses.

 In addition, in one NSHL family we identified a missense variant in the candidate deafness-causing gene DIAPH2, coding for a protein involved in actin filament elongation. My in-vitro studies indicate a possible functional impairment of the mutant DIAPH2 protein, which might be very relevant in hearing function. In fact, immunohistochemical studies indicate that the mouse ortholog protein Diap2 is expressed in the cochlea in the actin-rich stereocilia of the sensory outer hair cells during development. Auditory brainstem response measurements to evaluate the hearing phenotype of Diaph2 knock-out and knock-in mice were also undertaken. However, at least at the time points analysed, no hearing impairment was detected in the mouse models. Consequently, the role of DIAPH2 in HL in humans still needs to be further clarified.
Structure of $^8B$ and astrophysical $S_{17}$ factor in Skyrme Hartree-Fock theory
Creators: name: Chandel, S. S.
name: Dhiman, S. K.
name: Shyam, R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the ground state structure of $^8$B within the Skyrme Hartree-Fock framework where spin-orbit part of the effective interaction is adjusted to reproduce the one-proton separation energy of this nucleus. Using same set of force parameters, binding energies and root mean square radii of other light p-shell unstable nuclei, $^8$Li, $^7$B,$^7$Be, and $^9$C, have been calculated where a good agreement with corresponding experimental data is obtained. The overlap integral of $^8$B and $^7$Be wave functions has been used to determine the root mean square radius of the single proton in a particular orbit and also the astrophysical S factor ($S_{17}$) for the $^{7}$Be($p, γ)^{8}$B radiative capture reaction. It is found that the asymptotic region (distances beyond 4 fm) of the p-shell single proton wave function contributes more than half to the calculated value (4.93 fm) of the corresponding single particle root mean square radius. We determine a $S_{17}$ 21.1 eV.b which is in good agreement with the recommended value for near zero energy $S_{17}$ of $19.0^{+4.0}_{-1.0}$ eV.b.
description: some typos corrected
Risk Trading in a Chance-Constrained Stochastic Electricity Market
Creators: name: Mieth, Robert
name: Roveto, Matt
name: Dvorkin, Yury
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Existing electricity market designs assume risk neutrality and lack risk-hedging instruments, which leads to suboptimal market outcomes and reduces the overall market efficiency. This paper enables risk-trading in the chance-constrained stochastic electricity market by introducing Arrow-Debreu Securities (ADS) and derives a risk-averse market-clearing model with risk trading. To enable risk trading, the probability space of underlying uncertainty is discretized in a finite number of outcomes, which makes it possible to design practical risk contracts and to produce energy, balancing reserve and risk prices. Notably, although risk contracts are discrete, the model preserves the continuity of chance constraints. The case study illustrates the usefulness of the proposed risk-averse chance-constrained electricity market with risk trading.
Reconciliation for Practical Quantum Key Distribution with BB84 protocol
Creators: name: Benletaief, Nedra
name: Rezig, Houria
name: Bouallegue, Ammar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper investigates a new information reconciliation method for quantum key distribution in the case where two parties exchange key in the presence of a malevolent eavesdropper. We have observed that reconciliation is a special case of channel coding and for that existing techniques can be adapted for reconciliation. We describe an explicit reconciliation method based on Turbo codes. We believe that the proposed method can improve the efficiency of quantum key distribution protocols based on discrete quantum states.
description: 4 pages, 7 figures, conference. arXiv admin note: text overlap with arXiv:2002.04887; text overlap with arXiv:quant-ph/0406001 by other authors
Gravitational wave detection by a spherical antenna: the angular sensitivity of resonators in the TIGA configuration and its variation with sidereal time and galactic longitude
Creators: name: Gasparini, Maria Alice
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Experimental projects using spherical antennas to detect gravitational waves are nowdays a concrete reality. The main purpose of this paper is to give a possible way of interpreting output data from such a system. Responses of the five fundamental quadrupole modes and of the six resonators in TIGA collocations are shown as a function of the incoming direction of the incident wave. Then, for a source lying in the galactic plane, sidereal time and galactic longitude dependence is given. Thus, once a candidate source of gravitational waves is considered, we can exactly predict the resonators' response as a function of time.
description: 30 pages, 7 figures
Reputation Effects in Dynamic Games
Creators: name: Cripps, Martin
name: Cripps, Martin
Publisher: name: Unknown
Year: 1989
Subjects: Public Economics
Research Methods/ Statistical Methods

description: The solution of a reputational equilibrium is given for a class of linear, quadratic, gaussian dynamic games with noisy control. Although there is imperfect monitoring, a sequential equilibrium is found where the uninformed agents always smoothly learn the type of the informed agent, there is no sudden switch in agents' strategies; a common feature of reputation models. Reputation effects are temporary in the infinite horizon case for positive discount rates, as the discount factor tends to unity there is a permanent reputation.
title: Potentials and Limitations of WorldView-3 Data for the Detection of Invasive Lupinus polyphyllus Lindl. in Semi-Natural Grasslands
Creators: name: Schulze-Brüninghoff, Damian
name: Wachendorf, Michael
name: Astor, Thomas
Publisher: name: Universität Kassel
Year: 2021
Subjects: subject: invasive species
subject: WorldView-3
subject: grassland
subject: machine learning
subject: feature selection
subject: 600
subject: 630
subject: Invasive Art
subject: Vielblättrige Lupine
subject: Grünland
subject: Maschinelles Lernen
subject: Sensor
subject: Daten

description: Gefördert durch den Publikationsfonds der Universität Kassel
Evidence of an evolved nature of MWC 349A
Creators: name: Kraus, Michaela
name: Arias, Maria Laura
name: Cidale, Lydia S.
name: Torres, Andrea F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Galactic emission-line object MWC 349A is one of the brightest radio stars in the sky. The central object is embedded in an almost edge-on oriented Keplerian rotating thick disc that seems to drive a rotating bipolar wind. The dense disc is also the site of hot molecular emission such as the CO bands with its prominent band heads in the near-infrared spectral range. Despite numerous studies, the nature of MWC 349A is still controversial with classifications ranging from a pre-main sequence object to an evolved supergiant. We collected new high-resolution near-infrared spectra in the K- and L-bands using the GNIRS spectrograph at Gemini-North to study the molecular disc of MWC 349A, and in particular to search for other molecular species such as SiO and the isotope 13CO. The amount of 13CO, obtained from the 12CO/13CO ratio, is recognized as an excellent tool to discriminate between pre-main sequence and evolved massive stars. We find no signatures of SiO band emission, but detect CO band emission with considerably lower intensity and CO gas temperature compared to previous observations. Moreover, from detailed modelling of the emission spectrum, we derive an isotope ratio of 12CO/13CO = 4 +- 1. Based on this significant enrichment of the circumstellar environment in 13CO we conclude that MWC 349A belongs to the group of B[e] supergiants, and we discuss possible reasons for the drop in CO intensity.
description: 8 pages 5 figures, accepted for publication in MNRAS
Didemnum asterix Kott 2004, sp. nov.
Creators: name: Kott, Patricia
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Enterogona
Didemnidae
Didemnum
Didemnum asterix

description: Didemnum asterix sp. nov.
(figure 8D)
 Distribution. Type locality: Western Australia (9 n. mls north of Cape Legendre, 42– 40 m, coll. L. Marsh and M. Besant on RV Soela, 28 September 1982, holotype WAM 633.88).
 Description. The colony is paper-thin with a smooth surface. Zooids are evenly spaced in the firm test in which spicules are crowded throughout, making the surface raspy to the touch. Spicules are to 0.06 mm diameter and are of two types, some (including the larger ones), have sturdy, attenuated, conical rays, 9–11 in optical transverse section and a ray length / spicule diameter ratio up to 0.38. Some of the smaller spicules have up to 13 much shorter rays in optical transverse section, with a ray length / spicule diameter ratio as low as 0.2.
Although the surface is not quilted, deep primary common cloacal canals are the full depth of the zooids. Secondary canals penetrate amongst the thoraces (each with a ventral test strip) isolating them from one another. Zooids have a long thorax, but are not in good condition and the number of stigmata was not determined. The testis is undivided with eight coils of the vas deferens around it. A retractor projects from near the top of the oesophageal neck.
 Remarks. The very pointed, slightly attenuated longer spicule rays resemble those of D. roberti, but the presence of a second type of spicule with more and shorter rays and the differences in the form of the colonies distinguish these species from each other.
description: Published as part of Kott, Patricia, 2004, New and little-known species of Didemnidae (Ascidiacea, Tunicata) from Australia (part I), pp. 731-774 in Journal of Natural History 38 (19) on pages 747-748, DOI: 10.1080/00222930310001647334, http://zenodo.org/record/4653689
The WHAM Northern Sky Survey and the Nature of the Warm Ionized Medium in the Galaxy
Creators: name: Madsen, G. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Wisconsin H-Alpha Mapper (WHAM) has completed a velocity-resolved map of diffuse H-alpha emission of the entire northern sky, providing the first comprehensive picture of both the distribution and kinematics of diffuse ionized gas in the Galaxy. WHAM continues to advance our understanding of the physical conditions of the warm ionized medium through observations of other optical emission lines throughout the Galactic disk and halo. We discuss some highlights from the survey, including an optical window into the inner Galaxy and the relationship between HI and HII in the diffuse ISM.
description: 9 pages, 3 figures. To be published in "How does the Galaxy work?", eds. E.J. Alfaro, E. Perez & J. Franco, Kluwer, held 23-27 June 2003 in Granada, Spain. Higher resolution version available at http://www.astro.wisc.edu/~madsen/prof/pubs.html
How many inflections are there in the Lyapunov spectrum?
Creators: name: Jenkinson, Oliver
name: Pollicott, Mark
name: Vytnova, Polina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Iommi & Kiwi showed that the Lyapunov spectrum of an expanding map need not be concave, and posed various problems concerning the possible number of inflection points. In this paper we answer a conjecture of Iommi & Kiwi by proving that the Lyapunov spectrum of a two branch piecewise linear map has at most two points of inflection. We then answer a question of Iommi & Kiwi by proving that there exist finite branch piecewise linear maps whose Lyapunov spectra have arbitrarily many points of inflection. This approach is used to exhibit a countable branch piecewise linear map whose Lyapunov spectrum has infinitely many points of inflection.
description: 24 pages, 8 figures
Life Cycle Analysis : Forest Sciences Centre
Creators: name: Lin, Chu
Publisher: name: The University of British Columbia
Year: 2014

description: In this paper, Life Cycle Analysis (LCA) is carried out to assess the environmental impacts of the Forestry Science Center (FSC), which is located at the University of British Columbia (UBC). LCA processes and methodologies applied are discussed in detail. The scope of this project is defined as cradle-to-gate. In particular, takeoff is done by using OnScreen and impacts are estimated by using Impact Estimator (IE). Due to the limitation of the software and lack of the construction drawings of the building, uncertainties are introduced into the final results. Sensitivity analysis is performed for five specific building materials of FSC, in order to achieve a better understanding of the contribution to the environmental impact. In conclusion, concrete has the most significant impacts on the overall results. Furthermore, building performance is carried out to explore the payback period of envelope upgrades in terms of energy consumption. Recommendation is then made regarding to the future renovation to FSC or similar building type constructions. Note this project is part of a regionalized study of buildings at UBC, which is also the largest LCA analysis run by students. 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.”
On the Magnetic Nature of Quantum Point Contacts
Creators: name: Cornaglia, P. S.
name: Balseiro, C. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present results for a model that describes a quantum point contact. We show how electron-electron correlations, within the unrestricted Hartree-Fock approximation, generate a magnetic moment in the point contact. Having characterized the magnetic structure of the contact, we map the problem onto a simple one-channel model and calculate the temperature dependence of the conductance for different gate voltages. Our results are in good agreement with experimental results obtained in GaAs devices and support the idea of Kondo effect in these systems.
description: 7 pages, 4 figures
Didemnum coralliforme Kott 2004, sp. nov.
Creators: name: Kott, Patricia
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Enterogona
Didemnidae
Didemnum
Didemnum coralliforme

description: Didemnum coralliforme sp. nov.
(figure 9)
 Distribution. Type locality: Western Australia (W of Port Hedland, CSIRO Stn 126, 50 m, 30 August 1983, holotype NTM E34).
 Description. The colony is opaque, a milky-pink colour, crowded with spicules, and irregularly encrusting weed, with some branches and lamellae projecting from the surface. Spicules are packed especially hard in the basal test, and in the test core of branches (where they form a central axis providing a frame or internal skeleton for the colony). Stellate branchial apertures, with their margins outlined by spicules, are evenly spaced on the hard, flat surface.
 Double circles of large spherical vesicles interrupt the spicules around each branchial aperture. Spicules are stellate, to 0.085 mm diameter, with seven to nine long conical rays in optical transverse section, the ray length / spicule diameter ratio being 0.37. Comma-shaped thoraces cross the thoracic common cloacal cavity with a ventral sheath of test. Abdomina are embedded in the basal test.
Zooids are robust with a well-defined, tulip-shaped branchial siphon, a short retractor muscle from halfway down the oesophageal neck, the post-pyloric part of the gut loop bent ventrally at right angles to the long axis of the zooid, and eight coils of the vas deferens around an undivided testis. Larvae are not known.
 Remarks. Spicules are like those of D. madeleinae Monniot and Monniot, 2001 and D. perplexum Kott, 2001, but are larger and have a few more and longer spicule rays. Didemnum grande has similar spicules but only seven coils of the vas deferens and D. granulatum has similar but smaller spicules and only six coils of the vas deferens. Didemnum captivum Monniot and Monniot, 1997 from Tanzania has eight vas deferens coils and similar but smaller spicules (0.04 mm diameter).
 The vesicles in the surface test which interrupt the spicules around each branchial aperture have formerly been reported for D. spadix Kott, 2001, although they are known also in Polysyncraton (P. circulum, P. miniastrum and P. orbiculum).
description: Published as part of Kott, Patricia, 2004, New and little-known species of Didemnidae (Ascidiacea, Tunicata) from Australia (part I), pp. 731-774 in Journal of Natural History 38 (19) on pages 748-749, DOI: 10.1080/00222930310001647334, http://zenodo.org/record/4653689