cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Intervention scenarios to enhance knowledge transfer in a network of firm
Creators: name: Schweitzer, Frank
name: Zhang, Yan
name: Casiraghi, Giona
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Multiagent Systems (cs.MA)
subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We investigate a multi-agent model of firms in an R\&D network. Each firm is characterized by its knowledge stock $x_{i}(t)$, which follows a non-linear dynamics. It can grow with the input from other firms, i.e., by knowledge transfer, and decays otherwise. Maintaining interactions is costly. Firms can leave the network if their expected knowledge growth is not realized, which may cause other firms to also leave the network. The paper discusses two bottom-up intervention scenarios to prevent, reduce, or delay cascades of firms leaving. The first one is based on the formalism of network controllability, in which driver nodes are identified and subsequently incentivized, by reducing their costs. The second one combines node interventions and network interventions. It proposes the controlled removal of a single firm and the random replacement of firms leaving. This allows to generate small cascades, which prevents the occurrence of large cascades. We find that both approaches successfully mitigate cascades and thus improve the resilience of the R\&D network.
Decoherence-free creation of atom-atom entanglement in cavity via fractional adiabatic passage
Creators: name: Amniat-Talab, Mahdi
name: Guerin, Stephane
name: Jauslin, Hans-Rudolf
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a robust and decoherence insensitive scheme to generate controllable entangled states of two three-level atoms interacting with an optical cavity and a laser beam. Losses due to atomic spontaneous transitions and to cavity decay are efficiently suppressed by employing fractional adiabatic passage and appropriately designed atom-field couplings. In this scheme the two atoms traverse the cavity-mode and the laser beam in opposite directions as opposed to other entanglement schemes in which the atoms are required to have fixed locations inside a cavity. We also show that the coherence of a traveling atom can be transferred to the other one without populating the cavity-mode.
description: 4 pages, 5 figures, Submitted to Phys. Rev
Enantioselective synthesis of the sesterterpenoid (-)-dysidiolide and structurally related analogues
Creators: name: Caillé, Sébastien
Publisher: name: University of British Columbia
Year: 2009

description: The enantioselective total synthesis of the marine natural product (-)-dysidiolide (1) is described in this thesis. In addition, six structural analogues of the sesterterpenoid were synthesized in their enantiomerically pure forms. These substances are (-)-6- epidysidiolide (25), (-)-4,6-bisepidysidiolide (148), (-)-15-epidysidiolide (26), (-)-4,15- bisepidysidiolide (181), (-)-6,15-bisepidysidiolide (27), and (-)-4,6,15-trisepidysidiolide (194) The synthesis of (-)-dysidiolide (1) started with the conversion of known racemic alcohol 35 into a,(3-unsaturated ketone 38. Diastereoselective addition of cyanocuprate 33 to the conjugated enone function of racemic 38 provided ketone 46. Ozonolytic cleavage of the alkenic bond of 46 yielded dione 59, which underwent an aldol condensation-dehydration process to afford bicyclic conjugated enone 60. A stereospecific Claisen rearrangement using allylic alcohol 64 (available from 60) as starting material produced racemic tertiary amide 80. A series of transformations were used to obtain racemic alcohol 29 from 80. The two enantiomers of 29 were separated, and enantiomerically pure alcohol (-)-29 was employed to continue the synthetic endeavor towards (-)-l. The mixture of nitriles 28 was synthesized from (-)-29 via a sequence of reactions. Diastereoselective alkylation of the anion of 28 with iodide 119 afforded nitrile (-)-120, which was converted into aldehyde (-)-6 in several steps. (-)-Dysidiolide (1) was constructed from (-)-6 according to a known procedure. The anion of 28 was alternatively alkylated with methyl iodide to produce nitrile (—)-118. Structural analogues (-)-25 and (-)-148 were constructed from the latter material. Enantiomerically pure alcohol (+)-35 was synthesized and converted into (-)-60 as described above for its racemic counterpart. A stereospecific Claisen rearrangement using allylic alcohol (-)-63 (available from (-)-60) as starting material provided tertiary amide (-)-149. The remaining four structural analogues of (-)-l, namely (-)-26, (-)-181, (-)-27, and (-)-194 were constructed from (-)-149 using sequences of reactions similar to those that were used to synthesize (-)-l, (-)-25, and (-)-148.
The Detection of Silicate Emission from Quasars at 10 and 18 Microns
Creators: name: Hao, Lei
name: Spoon, H. W. W.
name: Sloan, G. C.
name: Marshall, J. A.
name: Armus, L.
name: Tielens, A. G. G. M.
name: Sargent, B.
name: van Bemmel, I. M.
name: Charmandaris, V.
name: Weedman, D. W.
name: Houck, J. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the spectroscopic detection of silicate emission at 10 and 18 microns in five PG quasars, the first detection of these two features in galaxies outside the Local Group. This finding is consistent with the unification model for Active Galactic Nuclei (AGNs), which predicts that an AGN torus seen pole-on should show a silicate emission feature in the mid-infrared. The strengths of the detected silicate emission features range from 0.12 to 1.25 times the continuum at 10 microns and from 0.20 to 0.79 times the continuum at 18 microns. The silicate grain temperatures inferred from the ratio of 18-to-10 micron silicate features under the assumption of optically thin emission range from 140 to 220K.
description: 4 pages, including 2 tables and 3 figures. Accepted by ApJL
Supplementary Material S3: Structural Equation Modeling (SEM) Improving Numeracy Skills in Low Performing First Graders: A Randomized Controlled Trial
Creators: name: Lopez-Pedersen, Anita
name: Mononen, Riikka
name: Scherer, Ronny
name: Aunio, Pirjo
name: Melby-Lervåg, Monica
Publisher: name: figshare
Year: 2020
Subjects: subject: 130102 Early Childhood Education (excl. Maori)
subject: FOS: Educational sciences

description: Supplementary Material S2: Structural Equation Modeling (SEM) Improving Numeracy Skills in Low Performing First Graders: A Randomized Controlled Trial
Hashing protocol for distilling multipartite CSS states
Creators: name: Hostens, Erik
name: Dehaene, Jeroen
name: De Moor, Bart
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a hashing protocol for distilling multipartite CSS states by means of local Clifford operations, Pauli measurements and classical communication. It is shown that this hashing protocol outperforms previous versions by exploiting information theory to a full extent an not only applying CNOTs as local Clifford operations. Using the information-theoretical notion of a strongly typical set, we calculate the asymptotic yield of the protocol as the solution of a linear programming problem.
description: 13 pages, 3 figures, RevTeX4
Monte-Carlo simulations of fast Newtonian and mildly relativistic shock breakout from a stellar wind
Creators: name: Ito, Hirotaka
name: Levinson, Amir
name: Nakar, Ehud
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Strong explosion of a compact star surrounded by a thick stellar wind drives a fast ($>0.1c$) radiation mediated shock (RMS) that propagates in the wind, and ultimately breaks out gradually once photons start escaping from the shock transition layer. In exceptionally strong or aspherical explosions the shock velocity may even be relativistic. The properties of the breakout signal depend on the dynamics and structure of the shock during the breakout phase. Here we present, for the first time, spectra and lightcurves of the breakout emission of fast Newtonian and mildly relativistic shocks, that were calculated using self-consistent Monte-Carlo simulations of finite RMS with radiative losses. We find a strong dependence of the $νF_ν$ peak on shock velocity, ranging from $\sim 1$ keV for $v_s/c=0.1$ to $\sim 100$ keV for $v_s/c=0.5$, with a shift to lower energies as losses increase. For all cases studied the spectrum below the peak exhibits a nearly flat component ($F_ν\sim ν^0$) that extends down to the break frequency below which absorption becomes important. This implies much bright optical/UV emission than hitherto expected. The computed lightcurves show a gradual rise over tens to hundreds of seconds for representative conditions. The application to SN 2008D/XRT 080109 and the detectability limits are also discussed. We predict a detection rate of about one per year with eROSITA.
description: 11 pages, 11 figures, submitted to MNRAS
Regulatory Impact Assessment in Developing and Transition Economies: A Survey of Current Practice
Creators: name: Kirkpatrick, Colin
name: Zhang, Yin-Fang
name: Kirkpatrick, Colin
name: Zhang, Yin-Fang
Publisher: name: Unknown
Year: 2004
Subjects: subject: Public Economics
subject: regulatory impact assessment
subject: transition economies
subject: developing countries
subject: capacity building.

description: Regulatory impact assessment (RIA) involves a systematic appraisal of the costs and benefits associated with a proposed new regulation and evaluation of the performance of existing regulations. So far, most research has been concerned with the adoption of RIA in OECD countries. The purpose of this paper is to assess the co tribution that RIA can make to "better regulation" in developing and transition economies. The results reported in this paper from a survey of RIA use in a sample of developing and transition countries suggest that a growing number of low and middle-income countries are beginning to apply some form of regulatory assessment, but that the methods adopted are partial in their application and are not systematically applied across government. The paper discusses the implications of the findings for capacity building and future research.
General equilibrium modelling in South Africa: What the future holds
Creators: name: McDonald, Scott
name: Punt, Cecilia
name: McDonald, Scott
name: Punt, Cecilia
Publisher: name: Unknown
Year: 2005
Subjects: Research Methods/ Statistical Methods

description: This paper provides an overview of the main research contributions of the past decade using general equilibrium models to analyse agricultural issues in South Africa. The methodological developments since the change to democracy ten years ago are viewed in the context of developments in this area of research carried out internationally. It will be shown in this paper that the modelling and computing techniques have vastly improved during the past decade, both in an ongoing attempt to refine existing models, and in an attempt to extend the modelling framework to make provision for issues that cannot be sufficiently captured in the standard comparative static models. These extensions include dynamic modelling, global modelling, environmental modelling and micro simulation. The paper highlights the non-trivial data requirements of this type of modelling. The national statistical agency, Statistics South Africa, supports general equilibrium modellers by their development of input-output tables, social accounting matrices and, more recently, supply and use tables. This decade has therefore witnessed an improvement in the data for the construction of national level social accounting matrices. Requirements for provincial level data have however not been met sufficiently, posing huge challenges for provincial and regional modelling. The lack of primary data has however stimulated development of advanced data estimation techniques that can be applied to overcome this data challenge. Application of general equilibrium techniques to analyse agricultural issues in South Africa still remains limited and substantial support and training of researcher is still needed to expand domestic capacity in this field of research.
S1-CorrelationMatrix_IMPROVING NUMERACY SKILLS IN YOUNG CHILDREN.pdf
Creators: name: Lopez-Pedersen, Anita
name: Mononen, Riikka
name: Scherer, Ronny
name: Aunio, Pirjo
name: Melby-Lervåg, Monica
Publisher: name: figshare
Year: 2020
Subjects: subject: 130102 Early Childhood Education (excl. Maori)
subject: FOS: Educational sciences

description: Correlation Matrix _ Improving Numeracy Skills in Low Performing Frirst Graders: A Randomized Controlled Trial
Additional file 7 of Avoidable deaths in Sweden, 1997–2018: temporal trend and the contribution to the gender gap in life expectancy
Creators: name: Kiadaliri, Ali
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 7:. Observed age-standardized mortality rates (per 100,000 persons) for years 1997, 2010, and 2018 in Sweden, by sex.
Heavy Elements Nucleosynthesis On Accreting White Dwarfs: building seeds for the p-process
Creators: name: Battino, Umberto
name: Pignatari, Marco
name: Travaglio, Claudia
name: Lederer-Woods, Claudia
name: Denissenkov, Pavel
name: Herwig, Falk
name: Thielemann, Friedrich-Karl
name: Rauscher, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The origin of the proton-rich trans-iron isotopes in the solar system is still uncertain. Single-degenerate thermonuclear supernovae (SNIa) with n-capture nucleosynthesis seeds assembled in the external layers of the progenitor's rapidly accreting white dwarf phase may produce these isotopes. We calculate the stellar structure of the accretion phase of five white dwarf models with initial masses >~ 0.85Msun using the stellar code MESA. The near-surface layers of the 1, 1.26, 1.32 and 1.38Msun models are most representative of the regions in which the bulk of the p nuclei are produced during SNIa explosions, and for these models we also calculate the neutron-capture nucleosynthesis in the external layers. Contrary to previous rapidly-accreting white dwarf models at lower mass, we find that the H-shell ashes are the main site of n-capture nucleosynthesis. We find high neutron densities up to several 10^15 cm^-3 in the most massive WDs. Through the recurrence of the H-shell ashes these intermediate neutron densities can be sustained effectively for a long time leading to high neutron exposures with a strong production up to Pb. Both the neutron density and the neutron exposure increase with increasing the mass of the accreting WD. Finally, the SNIa nucleosynthesis is calculated using the obtained abundances as seeds. We obtain solar to super-solar abundances for p-nuclei with A>96. Our models show that SNIa are a viable p-process production site.
description: Accepted for publication in MNRAS. 49 pages, 17 figures, 5 tables
Invariance testing
Creators: name: Lopez-Pedersen, Anita
name: Mononen, Riikka
name: Scherer, Ronny
name: Aunio, Pirjo
name: Melby-Lervåg, Monica
Publisher: name: figshare
Year: 2020
Subjects: subject: 130102 Early Childhood Education (excl. Maori)
subject: FOS: Educational sciences

description: Supplementary Material S2: Invariance testing for the study: Improving Numeracy Skills in Low Performing Frirst Graders: A Randomized Controlled Trial
Price asymmetry in South African futures markets for agricultural commodities
Creators: name: Mashamaite, P.
name: Moholwa, B.
name: Mashamaite, P.
name: Moholwa, B.
Publisher: name: Unknown
Year: 2005
Subjects: Industrial Organization

description: This paper tests the existence of price asymmetry in South African futures markets for white and yellow maize, wheat and sunflower seeds using a dynamic price asymmetry model. The sum of coefficients test and the speed of adjustment test are used to determine whether or not prices move up in the same fashion as they move down, over daily and weekly data frequencies. Out of the four commodity futures markets studied over varying data frequencies, only daily wheat is price asymmetric. Wheat daily prices respond faster to price decreases than to price increases. The implication of the results is that past prices do affect current prices and contain information. Hence, the weak-form efficient market hypothesis appears to be contradicted for wheat futures market. Another important implication of the results is that implementing policies accounting for asymmetric behavior through price limit and margin policies will improve the functioning and stability of wheat futures market in South Africa.
The effects of entrepreneurial quality on the success of small, medium and micro agri-businesses in KwaZulu-Natal, South Africa
Creators: name: Darroch, Mark A.G.
name: Clover, T.A.
name: Darroch, Mark A.G.
name: Clover, T.A.
Publisher: name: Unknown
Year: 2005
Subjects: Agribusiness

description: This paper estimates a logit model of the effects of entrepreneurial quality on business success in a stratified random sample of 44 small, medium and micro enterprise (SMME) agribusiness owners financed by Ithala Development Finance Corporation, using loan repayment as a proxy for success. These owners were surveyed during October 2003-February 2004 and asked to score four components of entrepreneurial quality identified by Guzman and Santos (2001): preference for working as self-employed, motivation type, energizer behaviours, and personal and external factors. The results show that strong energizer behaviours (such as current and planned business expansion and staff training), more business experience, and family assistance to become an entrepreneur, promote loan repayment, while lack of access to electricity (proxy for lack of access to services) negatively affects loan repayment. Policymakers and public and private financial institutions could give more attention to these factors when implementing policies to promote access to finance by, and the growth of, agribusiness SMMEs.
A renormalized index theorem for some complete asymptotically regular metrics: the Gauss-Bonnet theorem
Creators: name: Albin, Pierre
Publisher: name: arXiv
Year: 2005
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53

description: The Gauss-Bonnet Theorem is studied for edge metrics as a renormalized index theorem. These metrics include the Poincaré-Einstein metrics of the AdS/CFT correspondence. Renormalization is used to make sense of the curvature integral and the dimensions of the $L^2$-cohomology spaces as well as to carry out the heat equation proof of the index theorem. For conformally compact metrics even mod $x^m$, the finite time supertrace of the heat kernel on conformally compact manifolds is shown to renormalize independently of the choice of special boundary defining function.
description: 3 figures
Assessment of smallholder's agriculture's contribution to the economy of Zimbabwe: A social accounting matrix multiplier analysis
Creators: name: Juana, James S.
name: Mabugu, Ramos E.
name: Juana, James S.
name: Mabugu, Ramos E.
Publisher: name: Unknown
Year: 2005
Subjects: Agricultural Finance

description: The economy of Zimbabwe has been in shambles since 1991. Output has declined in most of the production sectors, leading to many job losses. Current debates on the problems facing the economy have focused on poor government's incentives and excessive interventions as major constraints of economic development. The government of Zimbabwe, on the other hand has emphasized an agriculturally led economic recovery programme. Specifically, the government has undertaken land reform and investment policies aimed at promoting small-holder agriculture in Zimbabwe. Is this a justifiable action taken by the government? The answer to this question necessitated the use of the 1991 micro SAM for Zimbabwe to empirically analyze the impact of small-holder agriculture on the economy of Zimbabwe. The goal of this paper is to quantify small-holder agriculture's true contribution to the economy in general and poverty reduction in particular. However, to make a more detailed analysis, the other sectors are also included in the analytical framework. The study uses the traditional impact analyses to measure the incidence of a sector specific policy on the economy. The results provide evidence that investment in small-holder agriculture should be seen as investment in the entire economy. The study clearly shows that small-holder agriculture promotes sustainable development and the inclusion of rural communities especially the poorest in economic activities.
Comparison between methods for the determination of the primary cosmic ray mass composition from the longitudinal profile of atmospheric cascades
Creators: name: Ambrosio, M.
name: Aramo, C.
name: Donalek, C.
name: D'Urso, D.
name: Erlykin, A. D.
name: Guarino, F.
name: Insolia, A.
name: Longo, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The determination of the primary cosmic ray mass composition from the longitudinal development of atmospheric cascades is still a debated issue. In this work we discuss several data analysis methods and show that if the entire information contained in the longitudinal profile is exploited, reliable results may be obtained. Among the proposed methods FCC ('Fit of the Cascade Curve'), MTA ('Multiparametric Topological Analysis') and NNA ('Neural Net Analysis') with conjugate gradient optimization algorithm give the best accuracy.
description: 22 pages, 11 figures, accepted by Astroparticle Physics, minor misprints and an extra figure removed
Attributes of small-scale sugarcane contractors that influence their service quality in KwaZulu-Natal
Creators: name: Ortmann, Gerald F.
name: Nothard, B.W.
name: Meyer, E.
name: Ortmann, Gerald F.
name: Nothard, B.W.
name: Meyer, E.
Publisher: name: Unknown
Year: 2005
Subjects: Crop Production/Industries

description: The productivity of small-scale sugarcane contractors affects not only their own profitability and sustainability, but that of other stakeholders as well, such as the small-scale sugarcane farmers they contract to and the sugar mills they supply with sugarcane. This study examines the attributes of small-scale sugarcane contractors that affect their quality of service as perceived by small-scale sugarcane growers (SSGs). Information was obtained through interviews conducted with 114 contractors sampled in ten mill group areas in KwaZulu-Natal between September 2002 and July 2003. Further interviews were conducted in the same time period with SSGs for information on contractor service quality (transport and general service timeliness, meeting of daily rateable delivery requirements, low downtimes, good staff management, and minimal disagreements on service terms). Results show that factors affecting a contractor's perceived service quality include gender, training, the quality of information used (industry focused information sources such as the South African Sugar Association Experiment Station (SASEX) and the Ingede magazine, or general sources such as the radio), and sugarcane tonnage transported (size of business). Being a male contractor and having a larger business positively influence service rating as perceived by SSGs. The importance of the quality of information used and increased training levels highlights the need for the continual provision of relevant information and training for sugarcane contractors by extension services (government, SASEX and milling companies).
Effect of Elastic Deformations on the Critical Behavior of Three-Dimensional Systems with Long-Range Interaction
Creators: name: Belim, S. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A field-theoretical description of the behavior of compressible Ising systems with long-range interactions is presented. The description is performed in the two-loop approximation in three dimensions with the use of the Pade-Borel resummation technique. The renormalization group equations are analyzed, and the fixed points that determine the critical behavior of the system are found. It is shown that the effect of elastic deformations on a system with a long-range interaction causes changes in its critical, as well as multicritical, behavior.
description: 5 pages
Water markets in the Lower Orange River catchment of South Africa
Creators: name: Gillitt, C.G.
name: Nieuwoudt, W. Lieb
name: Backeberg, G.R.
name: Gillitt, C.G.
name: Nieuwoudt, W. Lieb
name: Backeberg, G.R.
Publisher: name: Unknown
Year: 2005
Subjects: Resource /Energy Economics and Policy

description: Irrigation farmers in the Lower Orange River were surveyed during October 2003 in order to study whether water marketing has promoted efficiency and to identify factors that affect future investment in irrigation farming. Econometric procedures (principal component and logit model) indicate that purchasers of water rights produce lucrative export grapes and horticultural crops with relatively less raisin, wine or juice grapes and less field crops; are more specialised in production; have more livestock (probably liquidity factor) and have a less negative view of the five-year review period. The water market has facilitated a transfer of water use from relatively lower value crops to relatively higher value crops, and also promoted the use of more advanced irrigation. An investment model using Ridge Regression indicates that the following variables are associated with future investment in irrigation farming; expected profitability, risk perception and risk aversion (Arrow/Pratt). Results confirm that farmers who are more risk averse invest less in the future as can be expected from theory. Policies that increase risk in agriculture will have a significant negative effect on future investment in irrigation. What is significant from the results is that irrigation farmers are highly risk averse (down side). Results also show that farmers who feel that water licenses are not secure expect to invest less in the future. The latter effect is thus amplified as farmers appear to be highly risk averse. This has important policy implications, and measures should be taken to improve the perceived security of water licenses. This could be achieved by keeping farmers more informed about the practical implications of the National Water Act (NWA) and specifically water licenses.
Llums que no són només llums
Creators: name: Baranda, Jorge
name: Henarejos, Pol
name: Gavrincea, Ciprian George
name: Lagunas, Miguel Ángel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Emerging Technologies (cs.ET)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Visible Light Communications (VLC) is a new paradigm in wireless communications. The characteristics of this technology, which uses light-emitting diode-based lighting devices as transmitting elements, make it possible to be considered a complement to current wireless radio communication systems. ----- Les comunicacions per llum visible o 'Visible Light Communications' (VLC) són un nou paradigma en comunicacions sense fils. Les característiques que presenta aquesta tecnologia, que utilitza els dispositius d'il{\lgem{}}luminació basats en díodes emissors de llum com elements transmissors, fa que es pugui considerar un complement dels actuals sistemes de comunicació inal`ambrics.
description: 4 pages, in catalan
Water marketing in the Crocodile River, South Africa
Creators: name: Nieuwoudt, W. Lieb
name: Gillitt, C.G.
name: Backeberg, G.R.
name: Nieuwoudt, W. Lieb
name: Gillitt, C.G.
name: Backeberg, G.R.
Publisher: name: Unknown
Year: 2005
Subjects: Resource /Energy Economics and Policy

description: Transfers of water in the Crocodile River above and below the gorge (near Nelspruit and Malelane) were studied based on a survey in the area during November 2003, followed up by telephonic interviewing during March 2004. Almost all the water trades (permanent and rentals) observed in this study were from farmers above the gorge to farmers below the gorge. In order to study whether the water market promotes efficiency the data were subjected to several statistical analyses (Principal Components, Ridge Regression, Logit). It is concluded that in the transfer of water some attributes in the purchasing area such as lower production risk (sugar cane) and lower financial risk and better cash flow (bananas and sugar cane) were more important than the income per cubic meter of water. Water supply in this area is highly irregular while farmers were found to be extremely risk averse especially as far as down-side risk is concerned. The average water price in this area in recent years (2002 to 2003) was between R2,000 and R3,000 per ha (1ha = 8,000 cubic meter). Buyers are large progressive farmers that purchase (and rent) from many sellers (or lessees). It is concluded that information (sale prices and rents) is asymmetrical. Few permanent transfers have taken place in the Crocodile River in recent years. It is concluded that there are reasons why transfers at present are not processed and role players should discuss these reasons and possible solutions before further action is taken.
Improving Numeracy Skills in Low Performing First Graders: A Randomized Controlled Trial. Invariance testing
Creators: name: Lopez-Pedersen, Anita
name: Mononen, Riikka
name: Scherer, Ronny
name: Aunio, Pirjo
name: Melby-Lervåg, Monica
Publisher: name: figshare
Year: 2020
Subjects: subject: 130102 Early Childhood Education (excl. Maori)
subject: FOS: Educational sciences

description: Supplementary Material S2: Invariance testing for the study: Improving Numeracy Skills in Low Performing Frirst Graders: A Randomized Controlled Trial
Spin accumulation in degenerate semiconductors near modified Schottky contact with ferromagnets
Creators: name: Osipov, V. V.
name: Bratkovsky, A. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study spin transport in forward and reverse biased junctions between a ferromagnetic metal and a degenerate semiconductor with a delta-doped layer near the interface at relatively low temperatures. We show that spin polarization of electrons in the semiconductor, Pn, near the interface increases both with the forward and reverse current and reaches saturation at certain relatively large current while the spin injection coefficient, Gamma, increases with reverse current and decreases with the forward current. We analyze the condition for efficient spin polarization of electrons in degenerate semiconductor near interface with ferromagnet. We compare the accumulation of spin polarized electrons in degenerate semiconductors at low temperatures with that in nondegenerate semiconductors at relatively high, room temperatures.
description: 11 pages, 4 figures, (v2) fig.4: missing broken line restored
Additional file 1 of ProgPerm: Progressive permutation for a dynamic representation of the robustness of microbiome discoveries
Creators: name: Zhang, Liangliang
name: Yushu Shi
name: Kim-Anh Do
name: Peterson, Christine B.
name: Jenq, Robert R.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Section S1: Mathematical notations. Section S2: Computational time. Section S3: Distribution of zeros. Section S4: Results of two permutation methods. Section S5: Results of continuous outcome.
Titanium plasma source for capillary discharge extreme ultraviolet lasers
Creators: name: Shuker, Moshe
name: Ben-kish, Amit
name: Fisher, Amnon
name: Ron, Amiram
Publisher: name: arXiv
Year: 2005
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A technique to generate jets of pure Titanium plasma is presented. A Ti wire is exploded in an Alumina capillary sealed with 1atm. of air inside. The generated plasma emerges from the capillary (to a high-vacuum environment) by ripping a thin Ti foil that seals one of the capillary ends. The generated plasma jets have a velocity of up to $4.5\pm0.5mm/μs$, an electron temperature of $1.5\pm0.5eV$ and a ion density of $2.7\pm1\times10^{17}/cc$. The plasma source was designed for a capillary discharge extreme ultraviolet laser experiment, but might also be useful to other application such as a target for Z-pinch experiments.
description: 4 pages, 3 figures
Promoting the competitiveness of South African agriculture in a dynamic economic and political environment
Creators: name: Ortmann, Gerald F.
name: Ortmann, Gerald F.
Publisher: name: Unknown
Year: 2005
Subjects: Agricultural and Food Policy

description: South African (SA) farmers are faced with a dynamic global economic and trade environment caused by the liberalisation of international markets and rapid advances in information and communication technologies In addition to dealing with the deregulation of domestic agricultural markets in the 1990s, SA farmers also have to adapt to a dynamic political environment and other challenges, including land reform, AgriBEE, new labour legislation and minimum wages, property taxes, skills levies, uncertain water rights, HIV/Aids, a volatile exchange rate, and high transport and communication costs. The main factors that will help promote the competitiveness of SA farmers, and the agricultural sector in general, include good governance at all levels of government and industry, institutional innovations for commercial and small-scale farmers, improving the quality of (school) education (particularly in mathematics and science) and skills training, promoting research in agriculture, and farmers adopting new technologies. Government should focus its relatively scarce resources on providing physical infrastructure (especially improved transport and communication infrastructure) and legal infrastructure (secure property rights and contract enforcement) to reduce transaction costs, including risk, so that markets for products and resources work more efficiently; relax restrictive labour laws; reduce uncertainty regarding land claims, AgriBEE and the rural land tax; improve efficiency in disbursing LRAD grants to approved projects; reduce crime rates; and promote education, agricultural R&D and skills training.
Supervisory Relationship, Organizational Climate and Satisfaction of Employees in a Local Community College
Creators: name: Dios, Erin Riego De
Publisher: name: figshare
Year: 2020
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences

description: This study aimed to analyze the supervisory relationship, organizational climate and satisfaction of employees in a local community college. The researcher used a descriptive-correlational design with the survey as the instrument and considered 60 respondents using a convenience sampling technique. An adopted and modified instrument was used to gather data. For the statistical treatment, the study used SPSS 22 to analyze the gathered data with the use of the following tools: frequency, percentage, weighted mean, t-test, ANOVA and Pearson-r. The study generated the following results: the respondents answered, “Agree” that they have a good and suitable supervisory relationship, organizational climate and overall satisfaction. In addition, there are significant findings observed in supervisory relationships and organizational climate when grouped according to demographic profiles. Furthermore, relationship exist between some of the demographic profiles of the respondents, supervisory relationship, organizational climate and overall satisfaction. With the forgoing results, the researcher recommended important suggestions for this study.
Der syrische Diatessaronkommentar zu der Perikope von der Samariterin am Brunnen
Creators: name: Beck, Edmund
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 74 (1990): Oriens christianus, Band 74
The influence of cations on DOPC adsorbed onto Hg/electrolyte interface electrochemical and impedance spectroscopy study
Creators: name: Agak, John Odiko
Publisher: name: University of British Columbia
Year: 2009

description: An electrochemical impedance spectroscopy (EIS) methodology has been developed, and combined with traditional electrochemical techniques to characterize the influence of applied potential on a dioleoyl phosphatidylcholine (DOPC) monolayer adsorbed at a Hg-0.1MKC1 interface. The DOPC monolayer was initially characterized using AC voltammetry in 0.1M.KC1, LiCl and TMAC1. The monolayer displayed a minimum low-capacitance region, 1.85 μF/cm² at -0.4 V. The potential was scanned from -0.4 V to -1.2 V and two capacitance peak 1 and 2 were observed at - 0.96 V and -1.04 V respectively. When the negative potential limit was made more negative, a third capacitance peak 3 was observed at -1.34 V. These peaks represent phase transformations due to changes in electrode coverage. At very negative potentials, the monolayer desorbed from Hg in KC1 and TMAC1 but no desorption was observed in LiCl. Addition of Ca²⁺ to the KC1 subphase, systematically changed the peak heights indicating a change in the kinetics of the phase transformation. In the presence of Ca²⁺, the desorption of the lipid was incomplete. However, addition of 1.0 mM of TMA⁺ enhanced the desorption of the lipid in the presence of Ca²⁺. In order to further characterize these layers, an EIS methodology was developed and tested on the Hg-KCl systems. The monolayer was modified by adding Ca²⁺ to the electrolyte subphase. Changes due to its interaction with the cations were characterized using the new technique. The potential was scanned from -0.4 V to the peak potentials and the impedance measured over a wide range of frequencies. The memodology allowed for the impedance measurements to be performed at a potential corresponding to the capacitance peak maximum without disrupting the monolayer organization. Impedance spectra at peak 1 indicated a phase change characterized by one time constant, peak 2 indicated a phase transformation characterized by two time constants and peak 3 showed a phase transformation characterized by three time constants. At the desorption potential value, the impedance spectra revealed the desorption of the monolayer from the Hg-KCl interface and incomplete desorption in the presence of Ca²⁺ in the subphase. The new methodology also allowed for changes in solution resistance due to the presence of adsorbed or desorbed DOPC monolayers to be observed. However, in the presence of DOPC no difference in solution resistance was observed between the adsorption and desorption potentials except when Ca²⁺ was introduced.
ANTIBIOTIC RESISTANCE IN BACTERIA: THE MOST DANGEROUS PATHOGENS
Creators: name: Khujaeva, Shakhnoz
Publisher: name: Zenodo
Year: 2024

description: Antibiotics have enabled the treatment of bacterial infections like meningitis and bacteraemia, which were once untreatable and often fatal. However, in recent decades, the overuse and misuse of antibiotics, along with various social and economic factors, have accelerated the spread of antibiotic-resistant bacteria, rendering many treatments ineffective. Today, antimicrobial resistance (AMR) claims at least 700,000 lives globally each year. The World Health Organization (WHO) warns this figure could soar to 10 million annually by 2050 if new, more effective treatments are not developed, emphasizing the urgent nature of this health crisis. In response to the growing threat of antibiotic resistance, the WHO released a list of priority pathogens in February 2017, including the ESKAPE group (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species), which pose the greatest danger to humans.
Cassava as drought insurance: Food security implications of cassava trials in Central Zambia
Creators: name: Barratt, N.
name: Chitundu, D.
name: Dover, O.
name: Elsinga, J.
name: Eriksson, S.
name: Guma, L.
name: Haggblade, M.
name: Haggblade, Steven
name: Henn, T.O.
name: Locke, F.R.
name: O'Donnell, C.
name: Smith, C.
name: Stevens, T.
name: Barratt, N.
name: Chitundu, D.
name: Dover, O.
name: Elsinga, J.
name: Eriksson, S.
name: Guma, L.
name: Haggblade, M.
name: Haggblade, Steven
name: Henn, T.O.
name: Locke, F.R.
name: O'Donnell, C.
name: Smith, C.
name: Stevens, T.
Publisher: name: Unknown
Year: 2006
Subjects: Food Security and Poverty

description: Wide, weather-induced fluctuations in maize production lead to recurrent food shortages in Zambia's maize consuming regions, while the cassava-growing regions of the north enjoy stable food production, even in drought years. Noting this striking correlation between drought vulnerability and the prevalence of maize as a staple food, a growing array of agencies in Zambia has begun introducing highly productive new cassava varieties, developed in the north, to more central and southerly regions in an effort to provide low-cost food security during drought years. Yet agroecological conditions in these drought-prone regions differ significantly from the northern research stations where Zambian scientists developed the new cassava varieties. So it is not clear that the varieties or management practices that work well in the north will prove optimal in other regions. In order to assist farmers and agencies interested in expanding cassava as a food security crop in central Zambia, we have conducted cassava trials in central Zambia over the past three years. Concurrently, we have engaged in regular onfarm discussions with early adopting farmers. Results from these investigations suggest that, with some modification of management practices recommended in the north, many of the new cassava clones offer a feasible means of mitigating lean season hunger and providing low-cost, in-kind drought insurance for rural households in central Zambia.
Effects of Trade Liberalization on Agriculture in Viet Nam: Commodity Aspects
Creators: name: Que, Nguyen Ngoc
name: Que, Nguyen Trung
name: Que, Nguyen Ngoc
name: Que, Nguyen Trung
Publisher: name: Unknown
Year: 2000
Subjects: subject: International Relations/Trade
subject: trade liberalization
subject: trade policies
subject: agricultural products

description: This book analyzes commodity aspects of the effects of trade liberalization on agriculture in Viet Nam. The study analyzes the effects of trade liberalization on selected commodities namely rice, coffee, rubber, tea and groundnut, at the national level and the farm level. The analysis includes ex-ante and ex-post welfare gain and loss at the national level and profitability at the farm level.
The 5f localization/delocalization in square and hexagonal americium monolayers: A FP-LAPW electronic structure study
Creators: name: Gao, Da
name: Ray, Asok K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic and geometrical properties of bulk americium and square and hexagonal americium monolayers have been studied with the full-potential linearized augmented plane wave (FP-LAPW) method. The effects of several common approximations are examined: (1) non-spin polarization (NSP) vs. spin polarization (SP); (2) scalar-relativity (no spin-orbit coupling (NSO)) vs. full-relativity (i.e., with spin-orbit (SO) coupling included); (3) local-density approximation (LDA) vs. generalized-gradient approximation (GGA). Our results indicate that both spin polarization and spin orbit coupling play important roles in determining the geometrical and electronic properties of americium bulk and monolayers. A compression of both americium square and hexagonal monolayers compared to the americium bulk is also observed. In general, the LDA is found to underestimate the equilibrium lattice constant and give a larger total energy compared to the GGA calculations. While spin orbit coupling shows a similar effect on both square and hexagonal monolayer calculations regardless of the model, GGA versus LDA, an unusual spin polarization effect on both square and hexagonal monolayers is found in the LDA results as compared with the GGA results. The 5f delocalization transition of americium is employed to explain our observed unusual spin polarization effect. In addition, our results at the LDA level of theory indicate a possible 5f delocalization could happen in the americium surface within the same Am II (fcc crystal structure) phase, unlike the usually reported americium 5f delocalization which is associated with crystal structure change. The similarities and dissimilarities between the properties of an Am monolayer and a Pu monolayer are discussed in detail.
description: 22 pages, 8 figures
Emotional Intelligence and Work Values of Selected Instructors from a Teacher Education Institution
Creators: name: Dios, Erin Riego De
Publisher: name: figshare
Year: 2020
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences

description: This study aimed to assess the emotional intelligence and work values of the selected instructors from a teacher education institution. The researcher used a descriptive correlational design in this study with the questionnaire as the main instrument of gathering data. Thirty instructors took part in the survey via convenience sampling. For the instrument, an adapted and modified version of the Emotional Intelligence Self-Assessment Questionnaire (1998) and Work Values Inventory (2006) was used. The researcher subjected the data with the following tools: Weighted Mean, t-test, ANOVA and Pearson-r with the help of SPSS 20. This study generated the following results: instructors agree moderately on the different indicators of emotional intelligence. The instructors also stated that all the indicators are important for the work values inventory. There are no significant differences found in the emotional intelligence and work values when grouped according to sex, civil status, educational attainment, and length of service. However, in terms of age, the emotional intelligence got a significant difference. There is also no significant relationship found between the demographic profile, emotional intelligence, and work values of the instructors. Based on the results, the researcher endorsed relevant recommendations.