cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
In Situ Microbeam Surface X-ray Scattering Reveals Alternating Step Kinetics During Crystal Growth
Creators: name: Ju, Guangxu
name: Xu, Dongwei
name: Thompson, Carol
name: Highland, Matthew J.
name: Eastman, Jeffrey A.
name: Walkosz, Weronika
name: Zapol, Peter
name: Stephenson, G. Brian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The stacking sequence of hexagonal close-packed and related crystals typically results in steps on vicinal {0001} surfaces that have alternating A and B structures with different growth kinetics. However, because it is difficult to experimentally identify which step has the A or B structure, it has not been possible to determine which has faster adatom attachment kinetics. Here we show that in situ microbeam surface X-ray scattering can determine whether A or B steps have faster kinetics under specific growth conditions. We demonstrate this for organo-metallic vapor phase epitaxy of (0001) GaN. X-ray measurements performed during growth find that the average width of terraces above A steps increases with growth rate, indicating that attachment rate constants are higher for A steps, in contrast to most predictions. Our results have direct implications for understanding the atomic-scale mechanisms of GaN growth and can be applied to a wide variety of related crystals.
description: Main paper: 11 pages, 8 figures; Supplemental: 8 pages, 12 figures. Version 3 is similar to v2, with additional edits to text and figures for clarity. In-depth descriptions of BCF (growth) model extended to alternating steps and CTR (scattering) analysis can be found at arXiv:2010.09575 and arXiv:2010.06166 (admin note: substantial text overlap with arXiv:2007.05083)
Applicability of self-consistent mean-field theory
Creators: name: Guo, Lu
name: Sakata, Fumihiko
name: Zhao, Enguang
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Within the constrained Hartree-Fock (CHF) theory, an analytic condition is derived to estimate whether a concept of the self-consistent mean field is realized or not in level repulsive region. The derived condition states that an iterative calculation of CHF equation does not converge when the quantum fluctuations coming from two-body residual interaction and quadrupole deformation become larger than a single-particle energy difference between two avoided crossing orbits. By means of the numerical calculation, it is shown that the analytic condition works well for a realistic case.
description: 11 pages, 8 figures
Plágio e outras más práticas na pesquisa científica
Creators: name: Casimiro, Adelaide
name: Tarragó, Nancy Sánchez
Publisher: name: figshare
Year: 2020
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications
subject: 80706 Librarianship
subject: 80799 Library and Information Studies not elsewhere classified

description: Material apresentado durante a palestra intitulada "Plágio e outras más práticas na pesquisa científica", proferida pela professora Drª Nancy Sánchez Tarragó e mediada pela professora Msª Adelaide Helena Casimiro. Esta palestra faz parte do evento II Troca de Saberes na Ciência da Informação, você pode assistir através do link https://youtu.be/GwFnLokYCOk.
Cointegration Analysis of Commodity Prices: Much Ado about the Wrong Thing?
Creators: name: Mallory, Mindy L.
name: Lence, Sergio H.
name: Mallory, Mindy L.
name: Lence, Sergio H.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agricultural Finance
subject: Financial Economics
subject: cointegration
subject: Johansen cointegration test
subject: moving average

description: This study highlights some problems with using the Johansen cointegration statistics on data containing a negative moving average (NMA) in the error term of the data generating process. We use a Monte Carlo experiment to demonstrate that the asymptotic distribution of the Johansen cointegration statistics is sensitive to the NMA parameters and that using the stated 5% critical values results in severe size distortion. In our experiment, using the asymptotic critical values resulted in empirical size of 76% in the worst case. To date a NMA in the error term was known to cause poor small sample performance of the Johansen cointegration statistics; however our study demonstrates that problems associated with a NMA in the error term do not improve as sample size increases. In fact, the problems become more severe. Further, we show that commodity prices in the U.S. tend to exhibit this property. We recommend that researchers pretest data for NMA in the error term before using the standard asymptotic critical values to test for cointegrating rank.
The effect of biofuel on the international oil market
Creators: name: Hochman, Gal
name: Rajagopal, Deepak
name: Zilberman, David
name: Hochman, Gal
name: Rajagopal, Deepak
name: Zilberman, David
Publisher: name: Unknown
Year: 2010
Subjects: subject: Resource /Energy Economics and Policy
subject: Energy
subject: OPEC
subject: biofuel
subject: fuel
subject: carbon savings
subject: optimal export tax model
subject: cheap oil

description: This paper derives a method to quantify the short- to medium-run impact of biofuel on fuel markets, assuming that these markets are dominated by cartel of oil-rich countries, and that prices in these countries are set to maximize the sum of domestic consumer and producer surplus, leading to a wedge between domestic and international fuel prices. We model this behavior by applying the optimal export tax model (henceforth, the cartel-of-nations model) to the fuel markets. Using data from 2007 to calibrate the model, we show that the introduction of biofuels lowered global gasoline and diesel consumption and international fuel prices by about 1% and 2%, respectively. We identify large differences between the effects of introducing biofuels using the cartel-of-nations model, in contrast to the competitive or the standard cartel model (henceforth, the cartel-of- firms model). We illustrate that assessing the effect of biofuels assuming competitive fuel markets overestimates the reduction in fuel price, and underestimates the reduction of gasoline and diesel consumption, and therefore impact of biofuels on greenhouse gas emissions, when compared to the effect under a cartel-of-nations model. Similar conclusions are derived with respect to cartel- of-firms model. Finally, we illustrate that a 20% increase in fuel demand more than doubles the impact of biofuels on fuel markets, compared to 2007.
2010 Outlook of the U.S. and World Wheat Industries, 2009-2019
Creators: name: Taylor, Richard D.
name: Koo, Won W.
name: Taylor, Richard D.
name: Koo, Won W.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: common wheat
subject: durum wheat
subject: production
subject: exports
subject: consumption
subject: ending stocks

description: This report evaluates the U.S. and world wheat markets for the 2009-2019 time period using the Global Wheat Policy Simulation Model. This analysis is based on a series of assumptions about general economic conditions, agricultural policies, weather conditions, and technological change. Both the U.S. and world wheat economies are predicted to remain relatively healthy for the next ten years. World demand for both common and durum wheat are expected to remain strong. The price levels in 2007, 2008 and 2009 might not be maintained in 2010 and the future because increased wheat and corn production in 2008 and 2009 and reduced demand for corn for ethanol production which pressures all commodity prices. World trade volumes of both classes of wheat are expected to expand, but trade volume of common wheat may grow faster than that of durum wheat.
Relaxation time approximation with pair production and annihilation processes
Creators: name: Bhadury, Samapan
name: Florkowski, Wojciech
name: Jaiswal, Amaresh
name: Ryblewski, Radoslaw
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We extend the Boltzmann equation in the relaxation time approximation to explicitly include transitions between particles forming an interacting mixture. Using the detailed balance condition as well as conditions of energy-momentum and current conservation, we show that only two independent relaxation time scales are allowed in such an interacting system. Dissipative hydrodynamic equations and the form of transport coefficients is subsequently derived for this case. We find that the shear and bulk viscosity coefficients, as well as the baryon charge conductivity are independent of the transition time scale. However, the bulk viscosity and conductivity coefficients that can be attributed to the individual components of the mixture depend on the transition time.
description: 11 pages, 6 figures, published version
DBI with Primordial Magnetic Field in the Sky
Creators: name: Ganjali, Mohammad A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we study the generation of a large scale magnetic field with amplitude of order $μ$G in an inflationary model which has been introduced in hep-th/0310221. This inflationary model based on existence of a speed limit for inflaton field. Generating a mass for inflaton at scale above the $ϕ_{IR}$, breaks the conformal triviality of the Maxwell equation and causes to originate a magnetic field during the inflation. The amplitude strongly depends on the details of reheating stage and also depends on the e-foldings parameter N. We find the amplitude of the primordial magnetic field at decoupling time in this inflationary background using late time behavior of the theory.
description: 12 pages, no figure, typos corrected
The Impact of Global Value Chains on the Retention of Staff in Chinese SMEs
Creators: name: Hunt, Patricia J.A.
Publisher: name: UH Research Archive
Year: 2021
Subjects: China
Human Resource Management
Small & Medium Enterprises (SMEs)
Global Value Chain (GVC)
Governance
Upgrading
Culture
Confucian Values
Retention
Guanxi
Migrant Workers
Hukou
Dormitory
ACFTU
Ministry of Environmental Protection
AMO
KSAO
Resource Based View
Automation

description: Small and medium-sized enterprises (SMEs) represent ninety-nine percent of China’s registered enterprises, yet they remain a much under researched phenomenon. In addition our knowledge of what constitutes human resource management (HRM) in Chinese enterprises is skewed, in that the majority of research is largely positivist and relies on responses from a single respondent, normally a manager. To respond to these lacuna this study is situated in six SMEs, all based in China, all supplying Buyer Driven Value Chains and all employing internal migrant workers. This marginalised group of migrant workers are the secret ingredient behind China’s economic miracle, which has historically relied on a largely passive, socially unequal workforce to underpin the cost effectiveness of the program of export orientated industrialisation (EOI), which has led to it being described as the workshop of the world. The study takes a longitudinal, qualitative, multi-stakeholder approach and utilising an inductive, social constructionist ontology has generated new insights into our knowledge of what constitutes the world of work from the perspective of the participants in it. Institutional and cultural influences are key determinants which impact the industrial relations process and practices, for example the Open Door and One Child policies and the pervasive cultural influence of guanxi, which are all evident in the empirical evidence. This study fills gaps in our knowledge and shows the construct of HRM is well understood in China. All practices are in use with subtle nuances, with the exception of appraisal, as it is culturally challenging, in that it is the opposite of the cultural preference of saving face. The study considers and contributes to the debate around global value chains (GVCs). Empirical evidence from the study clearly shows the asymmetrical patterns of power, in which lead firms keep a tight control on costs and concomitantly push risk further down the chain, which impedes their supplier’s ability to use HRM to aid staff retention.
Study of Saharan dust influence on PM10 measures in Sicily from 2013 to 2015
Creators: name: Cuspilici, A.
name: Monforte, P.
name: Ragusa, M. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Nowadays, particulate matter, especially that with small dimension as PM10, PM2.5 and PM1, is the air quality indicator most commonly associated with a number of adverse health effects. In this paper it is analyzed the impact that a natural event, such as the transport of Saharan dust, can have on increasing the particulate matter concentration in Sicily.Consulting the data of daily PM10 concentration, acquired by air quality monitoring network belonging to Agenzia Regionale Protezione Ambiente (Environmental Protection Regional Agency), it was possible to analyze the trend from 2013 to 2015. The days, in which the limit value was exceeded, were subjected to combined analysis. It was based on three models: interpretations of the air masses back trajectories, using the atmospheric model HYSPLIT (HYbrid Single Particle Lagrangian Integrated trajectory); on the calculation of the concentration on the ground and at high altitude particulate applying DREAM model (Dust REgional atmospheric model) and on the calculation of the concentration of mineral aerosols according to the atmospheric optical thickness (AOT) applying NAAPS model (Navy Aerosol Analysis and Prediction System).The daily limit value exceedances were attributed to the transport of Saharan dust events exclusively when the three models were in agreement with each other. Identifying the natural events, it was possible to quantify the contribution of the Saharan dust and consequently the reduction of the exceedances number.
description: Ecological Indicators
THE SEQUENCING OF AGRICULTURAL MARKET REFORMS IN MALAWI
Creators: name: Kherallah, Mylene
name: Govindan, Kumaresan
name: Kherallah, Mylene
name: Govindan, Kumaresan
Publisher: name: Unknown
Year: 1997
Subjects: subject: Marketing
subject: FOS: Economics and business

description: The paper analyzes the welfare impacts of alternative sequencing scenarios of agricultural market reforms in Malawi using a profit maximization approach. The simulation results show that, contrary to the sequencing path adopted in the 1980's, Malawi's Government should have liberalized the maize sector first, followed by the groundnut export sector, and once a supply response was generated, input subsidies could have been phased out, without generating a negative impact on producers' welfare and food security.
2021年资助DOAJ的出版商可以享受的回馈 Benefits for contributing publishers and aggregators 2021
Creators: name: Shen, Cenyu
Publisher: name: Zenodo
Year: 2021
Subjects: DOAJ

description: 该文档详细地解释了DOAJ的基本收录标准,著作权和许可的更多帮助,申请流程和其他政策。 Translated by Cenyu Shen, Yaping Liu
GLOBAL FOOD DEMAND AND THE CONTRIBUTION OF LIVESTOCK AS WE ENTER THE NEW MILLENNIUM
Creators: name: Delgado, Christopher L.
name: Courbois, Claude B.
name: Rosegrant, Mark W.
name: Delgado, Christopher L.
name: Courbois, Claude B.
name: Rosegrant, Mark W.
Publisher: name: Unknown
Year: 1998
Subjects: Livestock Production/Industries

description: People in developed countries currently consume about 3 to 4 times as much meat and fish, and 5 to 6 times as much milk products per capita as in developing Asia and Africa. Meat, milk, and fish consumption per capita has barely grown in the developed countries as a whole over the past 20 years. Yet poor people everywhere clearly desire to eat more animal protein products as their incomes rise above poverty level and as they become urbanized. Growth in per capita consumption and production has in fact occurred in regions such as developing Asia, and most particularly China. Per capita consumption of animal proteins and use of cereals as feed in Asia have both grown in the 3 to 5 percent per annum range over the past 20 years. By 2020, according to IFPRI’s IMPACT model projections, the share of developing countries in total world meat consumption will expand from 47 percent currently to 63 percent. Of the global total projected increase in meat consumption, 40 percent is from pork, 30 percent is from poultry and 24 percent is from beef. The latter helps mitigate the otherwise much larger decline in real beef prices expected through 2020. Projected annual growth in meat consumption in China of 3.2 percent per annum through 2020--up from 8.3 percent per annum from the early 1980's to the early 1990's, drives these results. A rapidly expanding supply of feedgrains will be essential to achieving the desire production increases for livestock products without undue upwards pressure on grain prices, especially in view of the role of monogastrics and the relative increase in industrial production in developing countries. IMPACT projections under various technical and economic assumptions suggest that there is enough production supply response in world systems to accomplish these production increases smoothly. Sensitivity analysis of the impact of restrictions on China’s ability to produce more feedgrains illustrates that in a system of linked global markets for cereals and livestock products, such restrictions are not effective at lowering Chinese livestock consumption, which is driven by global trade in manufactures, although they do lower Chinese livestock production. The resulting imbalance raises world feed costs by one-third in 2020 over anticipated levels, encourages increased livestock exports from Latin America, discourages livestock exports from the U.S., and reduces meat and cereals imports and consumption in the poorer countries of Africa and Asia.
The Nuclear Orbital Distribution in Galaxies as Fossil Record of Black Hole Formation from Integral-Field Spectroscopy
Creators: name: Cappellari, Michele
name: McDermid, Richard
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the past decade, most effort in the study of supermassive black holes (BHs) has been devoted to measuring their masses. This lead to the finding of the tight M_BH-sigma relation, which indicates the existence of strong links between the formation of the BH and of their host spheroids. Many scenarios have been proposed to explain this relation, and all agree on the key role of BHs' growth and feedback in shaping their host galaxies. However the currently available observational constraints, essentially BH masses and galaxy photometry, are not sufficient to conclusively select among the alternatives. A crucial piece of information of the black hole formation is recorded in the orbital distribution of the stars, which can only be extracted from high-resolution integral-field (IF) stellar kinematics. The introduction of IF spectrographs with adaptive optics on large telescopes opens a new era in the study of BHs by finally allowing this key element to be uncovered. This information will be complementary to what will be provided by the LISA gravitational wave satellite, which can directly detect coalescing BHs. Here an example is presented for the recovery of the orbital distribution in the center of the giant elliptical galaxy M87, which has a well resolved BH sphere of influence, using SAURON IF kinematics.
description: Invited talk, 8 pages, 4 figures, LaTeX. Accepted paper version for Classical and Quantum Gravity. Proceedings of the 5th International LISA Symposium
RETURNS TO SOCIAL CAPITAL AMONG TRADERS
Creators: name: Fafchamps, Marcel
name: Minten, Bart
name: Fafchamps, Marcel
name: Minten, Bart
Publisher: name: Unknown
Year: 1998
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Using data on agricultural traders in Madagascar, this paper shows that social capital has a large effect on efficiency. Better connected traders are shown to have significantly larger sales and gross margins than less connected traders after controlling for physical and human inputs. The analysis indicates that three dimensions of social network capital should be distinguished: relationships with other traders, which help firms economize on transactions costs; relationships with individuals who can help in times of financial difficulties, which insure traders against liquidity risk; and family relationships, which reduce efficiency, possibly because of measurement error. Social network capital enables traders to deal with each other in a more trustworthy manner by granting and receiving credit, exchanging price information, and economizing on quality inspection. Schooling is correlated with the use of superior modes of transaction but needs to be complemented by social network capital.
A description of infectious bovine keratoconjunctivitis outbreaks in West Virginia beef herds
Creators: name: Gingrich, Fred
Publisher: name: The Bovine Practitioner
Year: 2021

description: Infectious bovine keeratoconjuctivitis (IBK) is the most important ocular disease of cattle. Prevention and control of the disease can prove challengin, and the list of potential etiologic agens has expanded in recent years. Little has been recently published characterizing IBK outbreaks at the herd level. This case series investigation was conducted to describe the disease characteristics and management practices in herds affected by IBK outbreaks in 1 practice area in West Virginia in 2019. Seven producers were interviewed: 6 cow-calf producers and 1 stocker producer. Prdocuers were asked questions pertaining to disease severity and management, such as herd health protocols and husbandry. In addition, organisms from each of the herds were identified by culture and/or PCR. Results revealed a range of disease incidence as well as similarities and differences in management practices among herds. The interpretability of results is limted due to small sample size and data colelction method; however, results suggest that some herds in the area where producers were interviewed experienced severe IBK outbreaks, and that some management practices relevant to IBK were similar between herds. Results also suggest that further study to identify poorly characterized IBK risk factors is warrented.
description: The Bovine Practitioner, Vol. 49, No. 2 (2015 Summer)
A SLUGGISH DEMAND COULD BE AS POTENT AS TECHNOLOGICAL PROGRESS IN CREATING SURPLUS IN STAPLE PRODUCTION: THE CASE OF BANGLADESH
Creators: name: Ahmed, Raisuddin
name: Ahmed, Raisuddin
Publisher: name: Unknown
Year: 1997
Subjects: Food Security and Poverty

description: During the decade from 1982/83 through 1992/93, Bangladesh was able to increase production of rice, its staple food, at a rate modestly higher than the growth in population. However, the growth in per capita supply remained stagnant, because of the substitution of imports with domestic production. On the other hand, per capita income grew about 2 percent per annum. Nevertheless, the real price of rice declined about 2.7 percent annually. This decline in the rice price, on the face of a stagnant supply and increasing incomes, aroused suspicion whether income distribution has twisted against the poor who have a higher marginal propensity to consume rice compared to the rich. Three factors are identified that contributed to the decline in the rice price while per capita income increased: a) urbanization, b) diversification of diet, and c) income distribution. The analysis shows that, of a total demand depressing effect of 15.6 percent, urbanization accounts for 4 percentage points, cross-price effects for 7 percentage points, and worsening income distribution accounts, residually, for 4.6 percentage points. These findings are based on plausible values of demand and supply parameters which warrant fresh evaluation in the context of rapid structural change in the economy of Bangladesh.
MARKETING POLICY REFORM AND COMPETITIVENESS: WHY INTEGRATION AND ARBITRAGE COSTS MATTER
Creators: name: Badiane, Ousmane
name: Badiane, Ousmane
Publisher: name: Unknown
Year: 1998
Subjects: subject: Marketing
subject: FOS: Economics and business

description: The response of local markets to sectoral and macroeconomic policy changes is a key determinant of the long term impact of policy reforms on reforming economies. In other words, changes in arbitrage costs that are associated with policy reforms as well as the level of integration among local markets exert a strong influence of the economic outcome of reform programs. The objective of this paper is to explore this question theoretically and empirically. A model that can be used to capture the long term process that is involved has been developed and tested using data from Ghana. The model is later applied to analyze the outcomes of further liberalization of groundnut markets in Senegal. The findings highlights the potential cost of failing to pay sufficient attention, when liberalizing domestic markets, to the emergence of a competitive and efficient private distribution sector. The results also indicate that, when state-run processing sectors with monopoly power are involved, effective liberalization of pricing and marketing policies in all likelihood would not yield the anticipated benefits, unless accompanied with efforts to improve productivity and cut unit costs of production in the processing sector.
The $μ$ Tau Association: A 60 Myr-Old Coeval Group at 150 pc from the Sun
Creators: name: Gagné, Jonathan
name: David, Trevor J.
name: Mamajek, Eric E.
name: Mann, Andrew W.
name: Faherty, Jacqueline K.
name: Bédard, Antoine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: [Abbreviated] We present an analysis of the newly identified $μ$ Tau Association (MUTA) of young stars at $\sim$ 150 pc from the Sun that is part of the large Cas-Tau structure, coeval and co-moving with the $α$ Persei cluster. We identify more than 500 candidate members using Gaia DR2 data and the BANYAN $Σ$ tool (Gagné et al. 2018) and we determine an age of $62 \pm 7$ Myr for its population based on an empirical comparison of its color-magnitude diagram sequence with those of other nearby young associations. The MUTA is related to the Theia 160 group of Kounkel & Covey (2019) and corresponds to the e Tau group of Liu et al. (2020). As part of this analysis, we introduce an iterative method based on spectral templates to perform an accurate correction of interstellar extinction of Gaia DR2 photometry, needed because of its wide photometric bandpasses. We show that the members of the MUTA display an expected increased rate of stellar activity and faster rotation rates compared with older stars, and that literature measurements of the lithium equivalent width of nine G0 to K3-type members are consistent with our age determination. We show that the present-day mass function of the MUTA is consistent with other known nearby young associations. We identify WD 0340+103 as a hot, massive white dwarf remnant of a B2 member that left its planetary nebula phase only 270,000 years ago, posing an independent age constraint of $60_{-6}^{+8}$ Myr for the MUTA.
description: Accepted for publication in ApJ. 62 pages, 28 figures, 12 tables
Impact of Stakeholder Management Tools and Techniques on Construction Project Success
Creators: name: White, Stephanie Louise
name: Elmualim, Abbas
name: Abdalla, Salem Buhashima
Publisher: name: figshare
Year: 2020
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering

description: The purpose of this study is to analyse and explore the impact of stakeholder management on construction project success. It further aims to provide expounding context and application of effective tools and techniques involved in applying comprehensive stakeholder management in construction projects.
Shaping and policy search for nearest-neighbour control policies with applications to vehicle steering
Creators: name: Alton, Ken
Publisher: name: University of British Columbia
Year: 2009

description: The graceful animal motion we see in nature has proven extremely difficult to reproduce algorithmically. There is a need for further research into motion control techniques to address this problem adequately for computer animation and robotics applications. In this thesis, we describe a novel method for the synthesis of compact control policies for a variety of motion control problems. Direct policy search is applied to a nearest-neighbour control policy, which uses a Voronoi cell discretization of the observable state space, as induced by a set of control nodes located in this space. Such a semi-parametric representation allows for policy refinement through the adaptive addition of nodes. Thus, a coarse-to-fine policy search can be performed in such a way that the problem is shaped for easy learning. We apply our method to developing policies for steering various vehicles around a winding track. In particular, a policy is learned to steer a double-trailer truck backwards, a problem of considerable difficulty given the instability of the trailers. We also generate policies for the problems of balancing an inverted pendulum on a moving cart and driving the state of a point mass around a user-specified limit cycle. We examine these motion control results critically and discuss the limitations of the nearest-neighbour policy representation and our policy search method.
‘Weaving the Mashrabiya Pavilion’: A Mashrabiya-Inspired Pavilion Design based on Barycentric Subdivision
Creators: name: Iasef Md RIAN*,
name: Sebai, Humam Al
name: Abdalla, Salem Buhashima
Publisher: name: figshare
Year: 2020
Subjects: subject: 90202 Automotive Engineering Materials
subject: FOS: Mechanical engineering
subject: 91001 CAD/CAM Systems
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 91002 Flexible Manufacturing Systems

description: This paper shares an experience of applying the barycentric subdivision method for designing andconstructing a rope-made steel-framed pavilion structure for Dubai Design Week 2018. Barycentricsubdivision subdivides a polygon into multiple triangles, and we used this geometric process iterativelywith each cell of a triangular grid that eventually resulted in a complex pattern resembling the Islamicpattern “mashrabiyas” that is frequently seen in the Arab region. This geometric outcome helped us todesign the mashrabiya pavilion targeted for 2018’s Dubai Design Week event which mainly exhibitssuch designs that display contemporary expressions rooted or emerged from regional traditions. Weapplied our barycentric-subdivision-based mashrabiya-like pattern to a hypar (hyperbolic paraboloid)structure for making the proposed pavilion structure. We used ropes for weaving the mashrabiyainspiredweb. We conducted structural analysis to ensure the structural feasibility and strength of thepavilion for the real-world installation. This paper outlines the structural analysis of the pavilion briefly.After a series of analysis, we constructed the pavilion at the University campus by the students as a partof their hands-on design workshop exercise, and finally moved and installed it at the main venue DubaiDesign District for the exhibition. The whole workflow of the design and construction process wasstrategically designed so that students can acquire studio-based learning as well as off-studio hands-onconstruction experience targeting for a prestigious exhibition.
The 40Ca(alpha,gamma)44Ti reaction in the energy regime of supernova nucleosynthesis
Creators: name: Nassar, H.
name: Paul, M.
name: Ahmad, I.
name: Ben-Dov, Y.
name: Caggiano, J.
name: Ghelberg, S.
name: Goriely, S.
name: Greene, J. P.
name: Hass, M.
name: Heger, A.
name: Heinz, A.
name: Henderson, D. J.
name: Janssens, R. V. F.
name: Jiang, C. L.
name: Kashiv, Y.
name: Singh, B. S. Nara
name: Ofan, A.
name: Pardo, R. C.
name: Pennington, T.
name: Rehm, K. E.
name: Savard, G.
name: Scott, R.
name: Vondrasek, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The 44Ti(t1/2 = 59 y) nuclide, an important signature of supernova nucleosynthesis, has recently been observed as live radioactivity by gamma-ray astronomy from the Cas A remnant. We investigate in the laboratory the major 44Ti production reaction, 40Ca(alpha,gamma)44Ti (E_cm = 0.6-1.2 MeV/u), by direct off- line counting of 44Ti nuclei. The yield, significantly higher than inferred from previous experiments, is analyzed in terms of a statistical model using microscopic nuclear inputs. The associated stellar rate has important astrophysical consequences, increasing the calculated supernova 44Ti yield by a factor ~2 over previous estimates and bringing it closer to Cas A observations.
description: To be published in Phys. Rev. lett., 4 pages, 1 table, 2 figures
A handbook for establishing water user associations in pump-based irrigation schemes in Myanmar. In Burmese
Creators: name: De Silva, Sanjiv
name: Schmitter, Petra
name: Thiha, Nyan
name: Suhardiman, Diana
name: De Silva, Sanjiv
name: Schmitter, Petra
name: Thiha, Nyan
name: Suhardiman, Diana
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agribusiness
subject: Farm Management
subject: Industrial Organization
subject: Labor and Human Capital
subject: Research and Development/Tech Change/Emerging Technologies
subject: Water user associations
subject: Irrigation schemes
subject: Pumps
subject: Handbooks
subject: Guidelines
subject: Models
subject: Participatory management
subject: Irrigation management
subject: Farmer participation
subject: Gender
subject: Farmers organizations
subject: Water allocation
subject: Equity
subject: Organizational development
subject: Strategies
subject: Governing bodies
subject: Human resources
subject: Multi-stakeholder processes
subject: Nongovernmental organizations
subject: Government agencies
subject: Development policies
subject: Irrigation programs
subject: Infrastructure
subject: Costs
subject: Legal frameworks
subject: Regulations
subject: Awareness raising
subject: Empowerment
subject: Capacity building
subject: Training
subject: Villages
subject: Living standards
subject: Socioeconomic environment
subject: Conflicts

description: (Also in English)
HI Narrow Self-Absorption in Dark Clouds: Correlations with Molecular Gas and Implications for Cloud Evolution and Star Formation
Creators: name: Goldsmith, P. F.
name: Li, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a comparative study of HI narrow self-absorption (HINSA), OH, 13CO, and C18O in five dark clouds. The HINSA follows the distribution of the emission of the carbon monoxide isotopologues, and has a characteristic size close to that of 13CO. This confirms that the HINSA is produced by cold HI which is well mixed with molecular gas in well-shielded regions. The ratio of the atomic hydrogen density to total proton density for these sources is 5 to 27 x 10^{-4}. Using cloud temperatures and the density of HI, we set an upper limit to the cosmic ray ionization rate of 10^{-16} s^{-1}. Comparison of observed and modeled fractional HI abundances indicates ages for these clouds to be 10^{6.5} to 10^{7} yr. The low values of the HI density we have determined make it certain that the time scale for evolution from an atomic to an almost entirely molecular phase, must be a minimum of several million years. This clearly sets a lower limit to the overall time scale for star formation and the lifetime of molecular clouds.
Mahasweta Devi, Pterodactylus, Roman, Deutsche Erstausgabe, ins Deutsche übertragen von der Heidelberger Südasiengruppe
Creators: name: Redaktion, Die
Publisher: name: Südasien
Year: 2024

description: Südasien, Bd. 20 Nr. 4 (2000): Indiens Computer- und Softwareindustrie - Fakire an den Rechnern?
Modelling water isotopes in polar ice sheets
Creators: name: Lhomme, Nicolas
Publisher: name: University of British Columbia
Year: 2009

description: Concentrations of water isotopes in marine sediments and ice cores are a key indicator for estimating global and regional fluctuations of past temperatures. Interpreting these concentrations requires an understanding of the storage capacity and exchanges among the ocean, atmosphere and cryosphere as well as an understanding of the dynamical behaviour of these reservoirs. The contribution of the latter remains poorly established because of the paucity of deep ice cores in Greenland and Antarctica and the difficulty of interpreting these cores. To obtain the water isotope composition of polar ice sheets and gain an understanding of their stratigraphy, I develop a tracer transport method first proposed by Clarke and Marshall (2002) and significantly improve it by introducing an interpolation technique that accounts for the particular age-depth relationship of ice sheets. I combine the tracers with numerical models of ice dynamics to predict the fine layering of polar ice masses such that it is locally validated at ice core sites, hence setting a new method to constrain reconstructions of ice sheets' climatic and dynamic histories. This framework is first applied and tested with the UBC Ice Sheet Model of Marshall and Clarke (1997). I predict the three-dimensional time-evolving stratigraphy of the Greenland Ice Sheet and use the ice core records predicted at GRIP, Dye 3 and Camp Century to better determine the minimal ice extent during the Eemian, 127 kyr ago, when the Earth's climate was somewhat similar to the present. I suggest that 3.5-4.5 m of sea level rise could be attributed to melting in Greenland. Tracers are also applied to Antarctica with the LGGE Ice Sheet Model of Ritz et al. (2001). The three-dimensional model is compared to simple flow models at the deep ice core sites of Dome C, Vostok and Dome Fuji to test the hypotheses on depositional and dynamical conditions used for interpreting ice cores. These studies lead to a well-constrained stratigraphic reconstruction of the Greenland and Antarctic Ice Sheets and allow me to produce the first-ever self-consistent prediction of their bulk isotopic composition, hence closing the global water isotope budget of the Earth.
NOMAD: A Platform for Managing Research Data in Materials Science
Creators: name: Mansour, Ahmed E.
Publisher: name: Zenodo
Year: 2025

description: This talk took place on February 11, 2025, as part of the Love Data Week 2025.

It focused on a common challenge for materials scientists - managing diverse and large amounts of data. NOMAD offers a comprehensive research data management platform that transforms raw laboratory data files into structured and FAIR-compliant data. Attendees will learn about the core functionalities of NOMAD, how it facilitates data organization, improves collaboration, and leads to better research outcomes in materials science.

 

This work is funded by the NFDI consortium FAIRmat - Deutsche Forschungsgemeinschaft (DFG) - Project 460197019
An Analysis of Barungi's Over My Dead Body and Feminism.pdf
Creators: name: Asare, Evelyn
Publisher: name: figshare
Year: 2020
Subjects: subject: 190404 Drama, Theatre and Performance Studies
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: This is an Act by Act analysis of the play Over My Dead Body by Violet Barungi. A formalist Analysis approach. This review focuses on the play text in itself. Additionally, it critically speaks on Feminism in relation to the play and seeks to identify the perspective and values of the play script. Indeed, many of our African plays do not have a lot of information on them online. This is what I love, literature. Thus, I am using this medium to make this document accessible to all students who are studying this play. And for all who are interested in the Arts.
RURAL ECONOMY AND FARM INCOME DIVERSIFICATION IN DEVELOPING COUNTRIES
Creators: name: Delgado, Christopher L.
name: Siamwalla, Ammar
name: Delgado, Christopher L.
name: Siamwalla, Ammar
Publisher: name: Unknown
Year: 1997
Subjects: Agricultural Finance
Farm Management

description: Farm-level diversification, the adoption of alternative income-generating activities by farm households, is rarely deemed an explicit objective by economists. Where agricultural transformation has occurred, markets function well and agriculture is a waning portion of overall national product, such as the rice growing regions of Southeast Asia, farm diversification might be a desirable outcome of pursuing a market liberalization objective, but is probably not an end in itself. In Sub-Saharan Africa, where these conditions often do not hold, development depends on pro-actively commercializing rural areas. African farmers tend to diversify their production activities widely to mitigate risk, but to only produce one or two exportable commodities. High transaction costs are common barriers to diversification into new export opportunities, especially for the poor and less well-informed, who tend to fall behind during times of rapid structural change. Identifying appropriate rural institutions to incorporate rural people into new export opportunities is a major priority for relevant policy research; contract farming and participatory cooperatives offer promise and merit further study.
ORGANIZATIONAL AND ECONOMIC MECHANISM PROFESSIONALIZATION OF PUBLIC PROCUREMENT: THE EXPERIENCE OF UKRAINE
Creators: name: Khalina, V.
name: Butskyi, V.
name: Ustilovska, A.
Publisher: name: Sciences of Europe
Year: 2021
Subjects: public procurement
professionalization
authorized person
organizational and economic mechanism.

description: The field of public procurement is not only one of the most important in the country, but also one of the fastest changing. It is related to the expenditure of budget funds, the trust of citizens and businesses, as well as the fulfillment of obligations in the international context. All this encourages the continuous improvement of the public procurement system in legislative and procedural aspects, as well as in the aspect of professionalization of the sphere for its effective functioning. Today, the professionalization of public procurement is becoming increasingly important due to the increasing responsibility of authorized persons and, consequently, increasing the importance of having specialists in their place. Professionalization of any field requires the development and implementation of a certain organizational and economic mechanism through which all participants in this process could interact effectively, the relationship between them would be transparent and understandable, and the results concrete and measurable. The result of any educational process, and professionalization is carried out through it, are the acquired program results that can be measured or evaluated in some way. At the same time, we should not forget that the evaluation of these results is prolonged over time, because only during the implementation of professional activities are fully revealed the qualities of a specialist in a particular field. Therefore, it is surprisingly important to connect and constantly interact in the process of professionalization of all stakeholders: teachers, applicants, customers and participants in public procurement, representatives of the Authorized Body (Ministry of Economy, Trade and Agriculture of Ukraine), and the public as the main beneficiary. procurement. In Ukraine, the professionalization program is implemented under the auspices of the Ministry of Economic Development and covers a number of higher education institutions, both public and private, and is represented by the introduction of refresher courses, seminars and trainings from NGOs, private educational organizations and government agencies. But today this process has no signs of a single mechanism and raises many questions directly to future professionals who would like to become professional and acquire certain knowledge, skills and abilities in this area. Therefore, the development of organizational and economic mechanism for the professionalization of public procurement and streamlining of relations in this area is an urgent issue that needs to be addressed to improve the efficiency of the entire public procurement system.
A Possible Hidden Population of Spherical Planetary Nebulae
Creators: name: Soker, Noam
name: Subag, Eyal
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We argue that relative to non-spherical planetary nebulae (PNs), spherical PNs are about an order of magnitude less likely to be detected, at distances of several kiloparsecs. Noting the structure similarity of halos around non-spherical PNs to that of observed spherical PNs, we assume that most unobserved spherical PNs are also similar in structure to the spherical halos around non-spherical PNs. The fraction of non-spherical PNs with detected spherical halos around them, taken from a recent study, leads us to the claim of a large (relative to that of non-spherical PNs) hidden population of spherical PNs in the visible band. Building a toy model for the luminosity evolution of PNs, we show that the claimed detection fraction of spherical PNs based on halos around non-spherical PNs, is compatible with observational sensitivities. We use this result to update earlier studies on the different PN shaping routes in the binary model. We estimate that ~30% of all PNs are spherical, namely, their progenitors did not interact with any binary companion. This fraction is to be compared with the ~3% fraction of observed spherical PNs among all observed PNs. From all PNs, ~15% owe their moderate elliptical shape to the interaction of their progenitors with planets, while \~55% of all PNs owe their elliptical or bipolar shapes to the interaction of their progenitors with stellar companions.
description: AJ, in press
The Lorentz Transformation Sign Ambiguity and Its Relation to Measured Faster-than-c Photon Speeds
Creators: name: Buenker, Robert J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: It is shown that time intervals Delta t' measured for photons moving with speed v > c can be of the same sign for all observers according to special relativity, thereby avoiding any violation of Einstein causality. Previous assertions to the contrary have led to unnecessarily complicated interpretations of experiments which indicate that single photons do travel with faster-than-c speeds in regions of anomalous dispersion
description: 13 pages, 1 figure