cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modified non-linear Schrödinger models, ${\cal C}{\cal P}_s{\cal T}_d$ invariant $N-$bright solitons and infinite towers of anomalous charges
Creators: name: Blas, H.
name: Maguiña, M. Cerna
name: Santos, L. F. dos
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Modifications of the non-linear Schrödinger model (MNLS) $ i \partial_{t} ψ(x,t) + \partial^2_{x} ψ(x,t) - [\frac{δV}{δ|ψ|^2} ] ψ(x,t) = 0,$ where $ψ\in C$ and $V: R_{+} \rightarrow R$, are considered. We show that the MNLS models possess infinite towers of quasi-conservation laws for soliton-type configurations with a special complex conjugation, shifted parity and delayed time reversion (${\cal C}{\cal P}_s{\cal T}_d$) symmetry. Infinite towers of anomalous charges appear even in the standard NLS model for ${\cal C}{\cal P}_s{\cal T}_d$ invariant $N-$bright solitons. The true conserved charges emerge through some kind of anomaly cancellation mechanism. A dual Riccati-type pseudo-potential formulation is introduced for a modified AKNS system (MAKNS) and infinite towers of novel anomalous conservation laws are uncovered. In addition, infinite towers of exact non-local conservation laws are uncovered in a linear system formulation. Our analytical results are supported by numerical simulations of $2-$bright-soliton scatterings with potential $ V = - \frac{ 2η}{2+ ε} ( |ψ|^2 )^{2 + ε}, ε\in R, η>0$. Our numerical simulations show the elastic scattering of bright solitons for a wide range of values of the set $\{η, ε\}$ and a variety of amplitudes and relative velocities. The AKNS-type system is quite ubiquitous, and so, our results may find potential applications in several areas of non-linear physics, such as Bose-Einstein condensation, superconductivity, soliton turbulence and the triality among gauge theories, integrable models and gravity theories.
description: 58 pages, 15 figures. A new section added with derivations of novel anomalous charges in the pseudo-potential approach. A recent Ref. (arXiv:2102.07190 [hep-th]) about similar results on dark-soliton simulations has been added
Double parton distributions in the pion from lattice QCD
Creators: name: Bali, Gunnar S.
name: Castagnini, Luca
name: Diehl, Markus
name: Gaunt, Jonathan R.
name: Gläßle, Benjamin
name: Schäfer, Andreas
name: Zimmermann, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is obtained for almost all relevant Wick contractions. We investigate correlations in the spatial distribution of two partons in the pion, as well as correlations involving the parton polarisation. The patterns we observe depend significantly on the quark mass. We investigate the assumption that double parton distributions approximately factorise into a convolution of single parton distributions.
description: 60 pages, 33 figures. v2: added clarifications and a comparison with quark model results
Tropical and Subtropical Maize in Asia: Production Systems, Constraints, and Research Priorities
Creators: name: Gerpacio, Roberta V.
name: Pingali, Prabhu L.
name: Gerpacio, Roberta V.
name: Pingali, Prabhu L.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Crop Production/Industries
subject: Maize
subject: Agricultural development
subject: Farming systems
subject: Production policies
subject: Environmental factors
subject: Cropping systems
subject: Research projects
subject: Project management
subject: Asia

description: This book examines future technological and policy prospects for the sustainable intensification of rainfed upland maize production in Asia, and derives R&D priorities for specific maize production environments and markets. Village-level and farmer-group surveys were conducted to characterize upland maize production environments and systems in China, India, Indonesia, Nepal, the Philippines, Thailand, and Vietnam. Survey findings, particularly farmer-identified constraints to maize production, complemented with other relevant data, were used in country-level, R&D priority-setting workshops. High on the list of farmer constraints was drought, estimated to affect three production environments that are home to about 48 million rural poor and produce an estimated 16 million tons of maize, and others such as downy mildew, stem borers, soil erosion/landslides, waterlogging, poor agricultural extension/ technology transfer services, and poor access to low-interest credit and markets. Farmers felt that socioeconomic and policy-related constraints impact maize productivity more than technical constraints do. It is important to recognize that technology is not the only key to increasing productivity and bettering the conditions of marginal maize farmers in Asia. There is a growing trend towards commercializing and intensifying maize production that is different from the staple food self-sufficiency paradigm that has been the cornerstone of agricultural policy in most developing countries. Appropriate government policies could help alleviate the adverse consequences of commercialization and promote sustainable intensification of maize production, especially in marginal environments inhabited by resource-poor subsistence farmers
The more we get together : the politics of collaborative research between university-based and non university-based researchers
Creators: name: Niks, Marina I.
Publisher: name: University of British Columbia
Year: 2009

description: In the last decade there has been an increased interest in collaborative relationships between universities and other sectors of society. In research, the "partnership trend" has translated into collaborative research projects between university-based and non university-based researchers. This dissertation explores the experiences and understandings of university-based and non university-based researchers about their collaborative work. Specifically, this study looks at the motivation social researchers have to engage in collaborative projects, how their understandings of research and of collaboration influence the relationships they establish with each other and the conditions that participants believe promote collaborative research. The research is based on in depth interviews with twelve university-based and non university-based researchers who have had experience in collaborative research. The researchers interviewed chose to engage in collaborative research because they believe it is an approach that has the potential to involve different perspectives and enrich the research process, resulting in benefits to the community and to the university. The fact that many of the projects described by the researchers were ultimately in the hands of university-based researchers meant that formal academic ways of understanding and doing research were followed. Funding requirements and a lack of fit between academic reward systems and collaborative research processes strongly influence the kinds of collaborative relationships that university-based researchers can and choose to establish. These influences often mean that traditional academic notions of research overpower the collaborative process, limiting the potential of different perspectives to emerge. Collaborative research has the potential to become a space where researchers from different locations come together to generate knowledge. For this potential to be realized, all collaborating researchers' perspectives have to be considered as valid. This consideration would require a deconstruction of the conceptions of research that researchers bring to the relationship. The study ends with a strategy for those researchers who are considering building collaborative relationships to engage in conversations that explore the meanings of research they bring to the project as well as an analysis of how their locations influence the relationships they build and the knowledge they can generate individually and collectively.
A solution to the overdamping problem when simulating dust-gas mixtures with smoothed particle hydrodynamics
Creators: name: Price, Daniel J.
name: Laibe, Guillaume
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a fix to the overdamping problem found by Laibe & Price (2012) when simulating strongly coupled dust-gas mixtures using two different sets of particles using smoothed particle hydrodynamics. Our solution is to compute the drag at the barycentre between gas and dust particle pairs when computing the drag force by reconstructing the velocity field, similar to the procedure in Godunov-type solvers. This fixes the overdamping problem at negligible computational cost, but with additional memory required to store velocity derivatives. We employ slope limiters to avoid spurious oscillations at shocks, finding the van Leer Monotonized Central limiter most effective.
description: 6 pages, 5 figures, accepted to MNRAS
Primary Versus Secondary Leptons in the EGRET SNR's
Creators: name: Fatuzzo, Marco
name: Melia, Fulvio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The EGRET supernova remnants (SNR's) are all expanding into nearby dense molecular clouds, powering a shock at the interface where protons and electrons accelerate to relativistic energies. A viable mechanism for the emission of gamma$-rays in these sources is the decay of neutral pions created in collisions between the relativistic hadrons and protons in the ambient medium. But neutral pion decay alone cannot reproduce the whole high-energy spectrum, particularly below 100 MeV. A pion-decay scenario thus requires a lepton population to "fill in" the lower part of the spectrum via bremsstrahlung emission. This population, however, is constrained by the SNR radio spectrum. Taking our cue from the behavior of Sgr A East, an energetic EGRET SNR at the Galactic center, we here examine the role played in these sources by secondary leptons--electrons and positrons produced in proton-proton scattering events and the ensuing particle cascades. We show that while secondary leptons cannot account for the gamma-rays below 100 MeV, they can account for the hard radio spectra observed from the EGRET SNR's. Thus, it appears that both primary and secondary leptons may be important contributors to the overall broadband emission from these sources, but if so, must radiate most of their energy in different parts of the SNR-cloud environment. We show that shock acceleration in dense cores being overtaken by the expanding SNR shell can naturally lead to such a scenario.
description: 32 pages, 16 figures. Submitted to ApJ
Phenomenology of Magnetic Black Holes with Electroweak-Symmetric Coronas
Creators: name: Bai, Yang
name: Berger, Joshua
name: Korwar, Mrunal
name: Orlofsky, Nicholas
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Magnetically charged black holes (MBHs) are interesting solutions of the Standard Model and general relativity. They may possess a "hairy" electroweak-symmetric corona outside the event horizon, which speeds up their Hawking radiation and leads them to become nearly extremal on short timescales. Their masses could range from the Planck scale up to the Earth mass. We study various methods to search for primordially produced MBHs and estimate the upper limits on their abundance. We revisit the Parker bound on magnetic monopoles and show that it can be extended by several orders of magnitude using the large-scale coherent magnetic fields in Andromeda. This sets a mass-independent constraint that MBHs have an abundance less than $6 \times 10^{-3}$ times that of dark matter. MBHs can also be captured in astrophysical systems like the Sun, the Earth, or neutron stars. There, they can become non-extremal either from merging with an oppositely charged MBH or absorbing nucleons. The resulting Hawking radiation can be detected as neutrinos, photons, or heat. High-energy neutrino searches in particular can set a stronger bound than the Parker bound for some MBH masses, down to an abundance $10^{-7}$ of dark matter.
description: 40 pages, 3 figures; v2: Parker bound relaxed by 4pi due to unit correction
The Seed Industry for Dryland Crops in Eastern Kenya
Creators: name: Muhammad, Lutta
name: Njoroge, Kiarie
name: Bett, Charles
name: Mwangi, Wilfred
name: Verkuijl, Hugo
name: De Groote, Hugo
name: Muhammad, Lutta
name: Njoroge, Kiarie
name: Bett, Charles
name: Mwangi, Wilfred
name: Verkuijl, Hugo
name: De Groote, Hugo
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: Agricultural situation
subject: Seed industry
subject: Seed production
subject: Food security
subject: Marketing
subject: FOS: Economics and business
subject: Production costs
subject: Distribution costs
subject: Private sector
subject: Public sector
subject: Farmers
subject: Farming systems
subject: Dry farming
subject: Crop husbandry
subject: Kenya

description: The development and promotion of improved crop varieties as well as efficient seed production, distribution, and marketing systems have contributed significantly to increased agricultural production and food security in Kenya. However, these impacts have not been replicated in the semi-arid midlands due to climatic, soil, and institutional factors. Following the liberalization of agriculture in the late 1980s, there has been greater participation of the private sector, non-governmental organizations, and voluntary agencies in the area. This study examined the extent to which these developments affected farmers’ access to dryland crops. The study found that the low quantity of seed traded, high cost of production, and high seed supply prices constrained the development of local seed trade. It recommended developing and offering a range of varieties to farmers to increase demand, training to strengthen farmers’ capacity to manage seed on-farm, and reduction of high production and distribution costs through further research and institutional improvements. In addition, the “seed loans” model, which has been very effective in the area, should be strengthened.
Adoption of Maize Production Technologies in the Coastal Lowlands of Kenya
Creators: name: Wekesa, E.
name: Mwangi, Wilfred
name: Verkuijl, Hugo
name: Danda, Milton Kengo
name: De Groote, Hugo
name: Wekesa, E.
name: Mwangi, Wilfred
name: Verkuijl, Hugo
name: Danda, Milton Kengo
name: De Groote, Hugo
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: Maize
subject: Crops
subject: Innovation adoption
subject: Technology transfer
subject: Food production
subject: Production economics
subject: Production factors
subject: Plant breeding
subject: Fertilizers
subject: Yields
subject: Kenya

description: Maize is the major food crop grown in the coastal region of Kenya and constitutes a major component of the diet of the population in the region. However, average yields are far below the potential for the region and low production levels create serious food deficits. Over the years, new technologies have been introduced but adoption has remained low, especially for fertilizer. This paper examined current maize-farming practices and technological and socioeconomic factors that influenced adoption in the Kilifi and Kwale Districts of the Coast Province, that together account for half of maize production in the region. The study found low adoption levels for improved maize varieties and technology, especially fertilizer, among farmers in the area. Farmers cited poor availability of improved varieties, high cost, lack of knowledge, and unfavourable characteristics of improved varieties as reasons for non-adoption. The high price and poor availability of fertilizers, farmers’ inexperience with them, and their perception that soils were already fertile were among reasons given for low fertilizer use. The low levels of adoption of improved varieties indicate that they are not meeting farmers’ needs. The authors recommend that researchers communicate with and include farmers’ criteria when breeding varieties. In addition, alternative options should be extended to farmers who are not able to use inorganic fertilizers. Finally, given the major influence of the institutional environment found in the study, it is recommended that extension services be strengthened, especially where lack of knowledge was cited as a hindrance to adoption.
Gravitational clustering of relic neutrinos and implications for their detection
Creators: name: Ringwald, Andreas
name: Wong, Yvonne Y. Y.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the gravitational clustering of big bang relic neutrinos onto existing cold dark matter (CDM) and baryonic structures within the flat $Λ$CDM model, using both numerical simulations and a semi-analytical linear technique, with the aim of understanding the neutrinos' clustering properties for direct detection purposes. In a comparative analysis, we find that the linear technique systematically underestimates the amount of clustering for a wide range of CDM halo and neutrino masses. This invalidates earlier claims of the technique's applicability. We then compute the exact phase space distribution of relic neutrinos in our neighbourhood at Earth, and estimate the large scale neutrino density contrasts within the local Greisen--Zatsepin--Kuzmin zone. With these findings, we discuss the implications of gravitational neutrino clustering for scattering-based detection methods, ranging from flux detection via Cavendish-type torsion balances, to target detection using accelerator beams and cosmic rays. For emission spectroscopy via resonant annihilation of extremely energetic cosmic neutrinos on the relic neutrino background, we give new estimates for the expected enhancement in the event rates in the direction of the Virgo cluster.
description: 38 pages, 8 embedded figures, iopart.cls; v2: references added, minor changes in text, to appear in JCAP
title: C.Pulse: an industrial demonstrator for a digital twin powered by MBSE for achieving digital continuity during the complete development process
Creators: name: Mahboob, Atif
name: Hussein, Omar
name: Willrodt, Lennart
name: Thanga Raj Ashok Raaj, Vinodh
name: Takim, Mehmet
name: Spaans, Arjen
name: Hasib, Hassan
name: Birkenfeld, Klaas
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: The development of complex systems involves a variety both of methods and tools to generate, store and process development-related data and information. This brings Digital Continuity as a key topic for current research. This paper presents a Model-Based Systems Engineering (MBSE) approach that contributes to achieving Digital Continuity from the early phases of the product development process. This approach has the system architectural specifications at its core, which contains an executable system behaviour model. To provide early verification and validation capabilities, the specification model is enabled with real-time physics simulations and utilizes virtual reality and augmented reality technologies. Furthermore, the same specification model is used to control and communicate with the physical system, collecting real-time data about its operational state, resulting in a Digital Twin while minimizing additional development effort normally necessary for a Digital Twin. The approach is applied to the complete development life cycle of a medical delivery drone.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Synthesis of radio signals from extensive air showers using previously computed microscopic simulations
Creators: name: Tueros, Matias
name: Zilles, Anne
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The detection of extensive air showers (EAS) through their radio signal is becoming one of the most promising techniques for the study of Neutrinos and Cosmic rays at the highest energies. For the design, optimization and characterization of radio arrays, and of their associated reconstruction algorithms, tens of thousands of Monte Carlo simulations are needed. Current available simulation codes can take several days to compute the signals produced by a single shower, making it impossible to produce the required simulations in a reasonable amount of time, in a cost-effective and environmental-conscious way. In this article we present a method to synthesize the expected signals (the full time trace, not just the peak amplitude) at any point around the shower core, given a set of signals simulated in a finite number of antennas strategically located in a pattern that exploits the signature features of the radio wavefront. The method can be applied indistinctly to the electric field or to the antenna response to the electric field, in the three polarization directions. The synthesized signal can be used to evaluate trigger conditions, compute the fluence or reconstruct the shower incoming direction, allowing for the production of one single library of simulations that can be used and re-used for the characterization and optimization of radio arrays and their associated reconstruction methods, for a thousandth part of the otherwise required CPU time.
description: 22 pages, 13 figures
2009 PRECISION AGRICULTURAL SERVICES DEALERSHIP SURVEY RESULTS
Creators: name: Whipker, Linda D.
name: Akridge, Jay T.
name: Whipker, Linda D.
name: Akridge, Jay T.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: precision agriculture
subject: geographic information systems (GIS)
subject: crop input dealer
subject: variable rate application
subject: site-specific agriculture
subject: technology adoption.

description: In the spring of 2009, Crop Life magazine and Purdue University’s Center for Food and Agricultural Business conducted a survey of crop input dealers for the 14th consecutive year. In February, a questionnaire was mailed to 2500 Crop Life retail crop input dealership readers across the US. (See Appendix I to this report for a copy of the questionnaire.) A total of 258 questionnaires were returned, with 241 being usable. This provided an effective response rate of 9.6 percent, the lowest response rate in the 14 year history of the project. (In prior years, response rates have ranged from a high of 38 percent in 1996 to a low of 11 percent in 2001 and 2008.) Consistent with previous surveys, dealerships were asked questions about the types of precision services they offer and/or use in their businesses, how quickly their customers are adopting precision agriculture practices, and how profitable they are finding precision services to be in their businesses. This year additional questions were asked about the current barriers to adoption in terms of customers, dealers and technology, and their view on what future development in precision technology services would have the most impact on their business. Also explored this year were retailer-manufacturer roles and the changes expected over the next 2 to 3 years.
Priority Setting for Public-Sector Agricultural Research in Mozambique with the National Agricultural Survey Data
Creators: name: Walker, Thomas S.
name: Pitoro, Raul
name: Tomo, Alda
name: Sitoe, Isabel
name: Salencia, Celestino
name: Mahanzule, Rosalina
name: Donovan, Cynthia
name: Mazuze, Feliciano M.
name: Walker, Thomas S.
name: Pitoro, Raul
name: Tomo, Alda
name: Sitoe, Isabel
name: Salencia, Celestino
name: Mahanzule, Rosalina
name: Donovan, Cynthia
name: Mazuze, Feliciano M.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: food security
subject: food policy
subject: priority setting
subject: Mozambique
subject: rice

description: The bulk of this research report addresses the question of where commodity research should be cited across IIAM’s ten agro-ecologies and four zonal research centers. As IIAM decentralizes its scientific human resources to its four zonal center locations, it should not lose sight of the primacy of the Northeast Zonal Research Center in both economic importance and the potential for poverty reduction. Our analysis suggests that the Northeast Zonal Research Center contributes about 40% to value of commodity production and to absolute poverty alleviation. The temptation is that too many resources are allocated to the South Zonal Research Center because the research infrastructure in the south is wider and deeper than in the center and north of the country. If the three other zonal research centers are to fulfill their promise, a few key facilities need to be rehabilitated and strengthened in the center and north. The scarcity of research infrastructure is most constraining in the coastal agroecologies, especially for rice.
description: Institute of Agricultural Research of Mozambique; Directorate of Training, Documentation, and Technology Transfer
title: Sustainability strategies and their influence on the product development of machine tools and special machines
Creators: name: Brix, Torsten
name: Bücker, Silvie
name: Husung, Stephan
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: In the context of product development, the goal of developers is to design products based on a variety of stakeholder needs so that they sufficiently satisfy a wide range of required characteristics. The required properties relate to function, safety, manufacturability, cost, usability, etc. In recent years, sustainability has gained importance as an additional and now indispensable guiding principle in product development due to the rapidly growing global environmental, social and economic challenges. The focus of this paper is on sustainability, which takes into account resource consumption, environmental protection and ecology. The same applies to the circular economy as an essential component of sustainability strategies when it comes to product or material cycles, as well as the targeted repair, reuse, modification, waste prevention and upgrading of products, etc. A product category that is rarely in the public eye is machine tools and special machines. In order to consistently consider sustainability and the associated circular economy in the development of these machines, product developers need practice-oriented and methodically validated decision-making means. The paper discusses and systematizes possible sustainability strategies and their implications from different perspectives, such as business models or applicability.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Additional file 9 of A process for developing a sustainable and scalable approach to community engagement: community dialogue approach for addressing the drivers of antibiotic resistance in Bangladesh
Creators: name: King, Rebecca
name: Hicks, Joseph
name: Rassi, Christian
name: Shafique, Muhammad
name: Barua, Deepa
name: Prashanta Bhowmik
name: Das, Mahua
name: Elsey, Helen
name: Questa, Kate
name: Fariza Fieroze
name: Hamade, Prudence
name: Sameena Huque
name: Newell, James
name: Rumana Huque
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 9. CSG Members Male (4). Transcript of focus group discussion with male members of the community support group, region 4.
Electronic transport through a quantum dot network
Creators: name: Dorn, August
name: Ihn, Thomas
name: Ensslin, Klaus
name: Wegscheider, Werner
name: Bichler, Max
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The conductance through a finite quantum dot network is studied as a function of inter-dot coupling. As the coupling is reduced, the system undergoes a transition from the antidot regime to the tight binding limit, where Coulomb resonances with on average increasing charging energies are observed. Percolation models are used to describe the conduction in the open and closed regime and contributions from different blockaded regions can be identified. A strong negative average magnetoresistance in the Coulomb blockade regime is in good quantitative agreement with theoretical predictions for magnetotunneling between individual quantum dots.
description: 5 pages, 5 figures
SERVING PRODUCERS IN VOLATILE TIMES REPORT FROM THE 2008 LARGE COMMERCIAL PRODUCER SURVEY
Creators: name: Alexander, Corinne E.
name: Boehlje, Michael
name: Downey, W. Scott
name: Gray, Allan W.
name: Gunderson, Michael A.
name: Roucan-Kane, Maud
name: Alexander, Corinne E.
name: Boehlje, Michael
name: Downey, W. Scott
name: Gray, Allan W.
name: Gunderson, Michael A.
name: Roucan-Kane, Maud
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: commercial producers
subject: buying behavior
subject: attitudes
subject: demographic
subject: goals
subject: large farms

description: Purdue University’s Center for Food and Agricultural Business undertook the 2008 Large Commercial Producer Survey with the goal of providing food and agribusiness firms with a clear depiction of the commercial producers—a group that purchases the majority of agricultural inputs. This survey summarizes the results of more than 2,500 farm operator interviews completed in January and February 2008. The center first conducted this survey in 1993 and collects new data every five years. This study offers a broad look at changes in farm businesses over time. In addition to demographic information, the questions specifically explore the goals, attitudes and buying behaviors of large commercial farming and ranching operations.
Comment on "Search for $η'$ Bound Nuclei in the $^{12}\mathrm{C}(γ,p)$ Reaction with Simultaneous Detection of Decay Products"
Creators: name: Fujioka, H.
name: Itahashi, K.
name: Metag, V.
name: Nanova, M.
name: Tanaka, Y. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We comment on a recent paper by the LEPS2/BGOegg Collaboration [Phys. Rev. Lett. 124, 202501 (2020), arXiv:2005.03449].
description: accepted for publication in Physical Review Letters
Dissipation-induced topological transitions in continuous Weyl materials
Creators: name: Shastri, Kunal
name: Monticone, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Many topologically non-trivial systems have been recently realized using electromagnetic, acoustic, and other classical wave-based platforms. As the simplest class of three-dimensional topological systems, Weyl semimetals have attracted significant attention in this context. However, the robustness of the topological Weyl state in the presence of dissipation, which is common to most classical realizations, has not been studied in detail. In this paper, we demonstrate that the symmetry properties of the Weyl material play a crucial role in the annihilation of topological charges in the presence of losses. We consider the specific example of a continuous plasma medium and compare two possible realizations of a Weyl-point dispersion based on breaking time-reversal symmetry (reciprocity) or breaking inversion symmetry. We theoretically show that the topological state is fundamentally more robust against losses in the nonreciprocal realization. Our findings elucidate the impact of dissipation on three-dimensional topological materials and metamaterials.
Cosmic dimensions
Creators: name: Dow, Alan
name: hart, Klaas Pieter
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Topology (math.GN)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 54F45 (Primary); 03E50, 54E20 (Secondary)

description: Martin's Axiom for $σ$-centered partial orders implies that there is a cosmic space with non-coinciding dimensions.
description: 2005-11-15: new version, largely rewritten
title: Characterization of plastic-metal hybrid composites joined by means of reactive Al/Ni multilayers: evaluation of occurring thermal regime
Creators: name: Glaser, Marcus
name: Matthes, Sebastian
name: Riegler, Sascha Sebastian
name: Hildebrand, Jörg
name: Bergmann, Jean
name: Schaaf, Peter
name: Gallino, Isabella
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Present challenges in material science and joining technology are ever more subject to the desire for lightweight construction and engineering. Plastic-metal composites are suitable material combinations but also require the development and investigation of appropriate joining technologies. A particularly promising approach is the application of reactive multilayer foils. As an innovative method, these foils provide the possibility of flexible and low-distortion joining of dissimilar materials. The underlying reaction mechanism offers fast exothermic reaction propagation with well-known exothermic power output while the energy source is introduced directly into the joining zone. In this work, hybrid lap joints between semi-crystalline polyamide 6 and structured austenitic stainless steel X5CrNi18-10 were joined using reactive Al/Ni multilayer foils. The self-propagating reaction provides immediate temperatures that are well above the melting point of used plastic but decays rapidly after only a few milliseconds. To support ongoing investigations regarding composite formation, analysis of occurring thermal regime is in the focus of this work. Conducted experiments are supported by accompanying thermal simulation in ANSYS Workbench. Besides the estimation regarding sensitivity of thermal material parameters the evaluation of formed melting zone and resulting thermally influenced area is a central topic.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Additional file 8 of A process for developing a sustainable and scalable approach to community engagement: community dialogue approach for addressing the drivers of antibiotic resistance in Bangladesh
Creators: name: King, Rebecca
name: Hicks, Joseph
name: Rassi, Christian
name: Shafique, Muhammad
name: Barua, Deepa
name: Prashanta Bhowmik
name: Das, Mahua
name: Elsey, Helen
name: Questa, Kate
name: Fariza Fieroze
name: Hamade, Prudence
name: Sameena Huque
name: Newell, James
name: Rumana Huque
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 8. CSG Members Male (3). Transcript of focus group discussion with male members of the community support group, region 3.
Trends in Kenyan Agricultural Productivity: 1997-2007
Creators: name: Kibaara, Betty
name: Ariga, Joshua
name: Olwande, John
name: Jayne, Thomas S.
name: Kibaara, Betty
name: Ariga, Joshua
name: Olwande, John
name: Jayne, Thomas S.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Productivity Analysis
subject: Africa
subject: Kenya
subject: productivity

description: Agriculture continues to be a fundamental instrument for sustainable development, poverty reduction and enhanced food security in developing countries. Agricultural productivity levels in Sub Sahara Africa are far below that of other regions in the world, and are well below that required to attain food security and poverty reduction goals. On the other hand, the rate of agricultural productivity growth since the early 2000s has been quite impressive in many African countries, including Kenya, yet this is no cause for complacency. Sustained and accelerated growth requires a sharp increase in productivity of smallholder farmers. The Strategy to Revitalize Agriculture (SRA), Kenya Vision 2030, Comprehensive African Agricultural Development Program(CAADP) and Alliance for Green Revolution in Africa (AGRA) have underscored the importance of increasing agricultural productivity in the fight against poverty. In the past, agricultural production was largely a function of acreage, but further growth in production will have to be driven by productivity growth.
description: Egerton University Tegemeo Institute of Agricultural Policy and Development
Body Weight Outcomes and Food Expenditures Among Older Europeans: A simultaneous equation approach
Creators: name: Drichoutis, Andreas C.
name: Lazaridis, Panagiotis
name: Nayga, Rodolfo M.
name: Drichoutis, Andreas C.
name: Lazaridis, Panagiotis
name: Nayga, Rodolfo M.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Body Mass Index
subject: food expenditures
subject: simultaneous equations

description: We analyze the inter-relationships between body weight outcomes and food expenditures among older Europeans using a simultaneous equation model. Several statistical tests were conducted to assess endogeneity of selected variables, the exogeneity, relevance, and validity of instruments used, and the identification of the model. Our results generally suggest, contrary to normative views, that food-away-from-home expenditure is negatively related to body mass index (BMI). BMI is negatively related to the percentage of food spent away from home.
An extreme, blueshifted iron line profile in the Narrow Line Seyfert 1 PG 1402+261; an edge-on accretion disk or highly ionized absorption?
Creators: name: Reeves, J. N.
name: Porquet, D.
name: Turner, T. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on a short XMM-Newton observation of the radio-quiet Narrow Line Seyfert 1 PG 1402+261. The EPIC X-ray spectrum of PG 1402+261 shows a strong excess of counts between 6-9 keV in the rest frame. This feature can be modeled by an unusually strong (equivalent width 2 keV) and very broad (FWHM velocity of 110000 km/s) iron K-shell emission line. The line centroid energy at 7.3 keV appears blue-shifted with respect to the iron Kalpha emission band between 6.4-6.97 keV, while the blue-wing of the line extends to 9 keV in the quasar rest frame. The line profile can be fitted by reflection from the inner accretion disk, but an inclination angle of >60 deg is required to model the extreme blue-wing of the line. Furthermore the extreme strength of the line requires a geometry whereby the hard X-ray emission from PG 1402+261 above 2 keV is dominated by the pure-reflection component from the disk, while little or none of the direct hard power-law is observed. Alternatively the spectrum above 2 keV may instead be explained by an ionized absorber, if the column density is sufficiently high (N_H > 3 x 10^23 cm^-2) and if the matter is ionized enough to produce a deep (tau~1) iron K-shell absorption edge at 9 keV. This absorber could originate in a large column density, high velocity outflow, perhaps similar to those which appear to be observed in several other high accretion rate AGN. Further observations, especially at higher spectral resolution, are required to distinguish between the accretion disk reflection or outflow scenarios.
description: Accepted for publication in ApJ (18 pages, 5 figures, 1 table)
Additional file 9 of A novel hotspot and rare somatic mutation p.A138V, at TP53 is associated with poor survival of pancreatic ductal and periampullary adenocarcinoma patients
Creators: name: Gourab Saha
name: Singh, Richa
name: Argha Mandal
name: Das, Subrata
name: Esita Chattopadhyay
name: Prasun Panja
name: Paromita Roy
name: Navonil DeSarkar
name: Gulati, Sumit
name: Supriyo Ghatak
name: Shibajyoti Ghosh
name: Sudeep Banerjee
name: Bidyut Roy
name: Saurabh Ghosh
name: Chaudhuri, Dipankar
name: Arora, Neeraj
name: Nidhan K. Biswas
name: Sikdar, Nilabja
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 9.
Temperature dependence of the topological phase transition of BiTeI from first principles
Creators: name: Brousseau-Couture, Véronique
name: Antonius, Gabriel
name: Côté, Michel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A topological phase transition from a trivial insulator to a $\mathbb{Z}_2$ topological insulator requires the bulk band gap to vanish. In the case of noncentrosymmetric materials, these phases are separated by a gapless Weyl semimetal phase. However, at finite temperature, the gap is affected by atomic motion, through electron-phonon interaction, and by thermal expansion of the lattice. As a consequence, the phase space of topologically nontrivial phases is affected by temperature. In this paper, the pressure and temperature dependence of the indirect band gap of BiTeI is investigated from first principles. We evaluate the contribution from both electron-phonon interaction and thermal expansion, and show that their combined effect drives the topological phase transition towards higher pressures with increasing temperature. Notably, we find that the sensitivity of both band extrema to pressure and topology for electron-phonon interaction differs significantly according to their leading orbital character. Our results indicate that the Weyl semimetal phase width is increased by temperature, having almost doubled by 100 K when compared to the static lattice results. Our findings thus provide a guideline for experimental detection of the nontrivial phases of BiTeI and illustrate how the phase space of the Weyl semimetal phase in noncentrosymmetric materials can be significantly affected by temperature.
description: 20 pages, 10 figures, 6 tables
100 sse sm
Creators: name: Winston, David
Publisher: name: Zenodo
Year: 2021
Subjects: 100 sse sm

description: BBKare Inc provides quality 100 sse sm online at wholesale prices. Order now at the official website for more products and information. CALL FOR DISCOUNT– Special needs extended heavy-duty full stainless steel changing table with hygiene polystyrene changing surface. This is ideal for adult or physically challenged care facilities, schools, nursing homes, and hospitals. 5 Year No Hassle Warranty.
Dynamic Decomposition of Total Factor Productivity Change in the EU Food, Beverages, and Tobacco Industry: The Effect of R&D
Creators: name: Emvalomatis, Grigorios
name: Stefanou, Spiro E.
name: Oude Lansink, Alfons G.J.M.
name: Emvalomatis, Grigorios
name: Stefanou, Spiro E.
name: Oude Lansink, Alfons G.J.M.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: TFP change
subject: Food Industry
subject: R&D.

description: The main objective of this paper is to generate measures of TFP change for the food, beverages, and tobacco industry in the EU. Explicitly taking into account the fact that some of the inputs used in the industry are fixed in the short run, the generated measures of TFP change reflects the dynamic nature of the problem. The second objective is to analyse TFP change into its components and explicitly examine the effect of Research and Development (R&D) effort on TFP growth. Data are collected from EU KLEMS and the OECD Structural Analysis database. The data contain country-level information on output volume, input prices and capital stock, as well as R&D expenditure for the food, beverages, and tobacco industry for the 15 “old” EU Member States. They cover the 1970-2005 but most series contain gaps. The results show that for the period under consideration TFP in the industry grew on average at an annual rate of almost 2%. TFP growth was much faster in the 1970s and 1980s, with a considerable slowdown in the 1990s. This growth is driven primarily by growth in output and secondly by the reduction in labour input. Expenditure on R&D has a positive but relatively small effect on TFP.
title: Molecular dynamics simulation of gallium phosphide zincblende cutting mechanism
Creators: name: Tavares, Michel R. P. M.
name: Rolon, Daniel
name: Kober, Julian
name: Kühne, Stefan
name: Schroeter, Rolf
name: Oberschmidt, Dirk
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Gallium Phosphide (GaP) has a low machinability, due to high tool wear and the need to induce a High-Pressure Phase Transformation (HPPT). HPPT changes GaP crystallographic structure from zincblende to β-tin. The latter is ductile and metastable, therefore, rather than be experimentally observably, must be simulated using atomistic methods. In this work, Classic Molecular Dynamics Simulations (CMDS) were used to analyse GaP HPPT and tool wear mechanisms during the cutting process. Diamond tools were modelled with 10 nm cutting edge radius, -20º and -10º rake angles, and -10º clearance angle. The simulations revealed that the main shear mechanism involved stacking faults, planar dislocations within the crystal structure, while HPPT had a limited role, being restricted to the deformation zone. A more significant surface crack and tool amorphization were observed for a rake angle -10º.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023