cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Profit, Management and Sustainable Agriculture
Creators: name: Wylie, Peter
Publisher: name: Unknown
Year: 1999
Subjects: Farm Management
Environmental Economics and Policy

description: Land degradation, in such forms as erosion, salinity and nutrient depletion, is affecting crop yields, reducing profitability and making farmers in Australia less competitive with farmers in other parts of the world. When combined with the effect of declining terms of trade, this has caused farm profitability to reach crisis levels in Australia. A common perception about sustainable agricuhure in Australia is that the solutions come at a cost. Because many farms do not make a profit, it is assumed that they caimot afford to make the changes required to become more sustainable. But it can be demonstrated that farming can be made more profitable and sustainable. This is important in the process of encouraging farmers to change to more sustainable practices. While aggregate results show that 50% of farms are not making a profit, there is evidence that a lack of adjustment on the part of farmers and deficiencies in management skills are a significant problem. The top 25% of farmers continue making good profits, in spite of adverse economic conditions. Top farms record profits which represent a return of 10% on assets. These farms continually work at fine-tuning their business to achieve a good enterprise mix, profitable crops in well planned rotations, moderate costs and good marketing.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
"Proactive Monitoring Versus a Non Planning Approach to Assess the Trace Element Status of Grazing Ruminants in New Zealand
Creators: name: Watt, Bevin
name: Grace, Neville D.
Publisher: name: Unknown
Year: 1999
Subjects: Industrial Organization

description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Stellar molecular jets traced by maser emission
Creators: name: Imai, Hiroshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Highly collimated jets found in AGB and post-AGB stars are expected to play an important role for shaping planetary nebulae. Recent VLBI observations of H2O maser sources have revealed that some of the spatio-kinematical structures of H2O maser sources exhibit stellar jets with extremely spatially and kinematically high collimation. Such stellar H2O maser jets, so-called "water fountain" sources, have been identified in about 10 sources to date. Here we review recent VLBI observations and relevant observational results of the water fountain sources. They have revealed a typical dynamical age and the detailed kinematical structures of the water fountains, possibility of the existence of "equatorial flows", and the evolutionary status of the host stars. The location and kinematics of one of the water fountain sources in the Galaxy is also revealed and shown here.
description: 8 pages, 6 figures, in the Proceedings of the IAU Symposium 242: Astrophysical Masers and their Environments
Neutron Stars and Gravitational Waves: the Key Role of Nuclear Equation of State
Creators: name: Koliogiannis, P. S.
name: Kanakis-Pegios, A.
name: Moustakidis, Ch. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Neutron stars are the densest known objects in the universe and an ideal laboratory for the strange physics of super-condensed matter. Theoretical studies in connection with recent observational data of isolated neutron stars, as well as binary neutron stars systems, offer an excellent opportunity to provide robust solutions on the dense nuclear problem. In the present work, we review recent studies concerning the applications of various theoretical nuclear models on a few recent observations of binary neutron stars or neutron-star--black-hole systems. In particular, using a simple and well-established model, we parametrize the stiffness of the equation of state with the help of the speed of sound. Moreover, in comparison to the recent observations of two events by LIGO/VIRGO collaboration, GW170817 and GW190425, we suggest possible robust constraints. We also concentrate our theoretical study on the resent observation of a compact object with mass~$\sim 2.59_{-0.09}^{+0.08}~M_{\odot}$ (GW190814 event), as a component of a system where the main companion was a black hole with mass $\sim 23~M_{\odot}$. There is scientific debate concerning the identification of the low mass component, as it falls into the neutron-star--black-hole mass gap. This is an important issue since understanding the nature of GW190814 event will offer rich information concerning the upper limit of the speed of sound in dense matter and the possible phase transition into other degrees of freedom. We systematically study the tidal deformability of a possible high-mass candidate existing as an individual star or as a component in a binary neutron star system. Finally, we provide some applications of equations of state of hot, dense nuclear matter in hot neutron stars, protoneutron stars, and binary neutron star merger remnants.
description: review article: 42 pages, 16 figures, 5 tables; accepted to be published in Foundations. v2: changes to match the published review article
Advanced Information Technology for the Sustainable and Integrated Rural Development-Experience in Italy-Hungary and Central Europe
Creators: name: Ciani, Adriano
name: Feher, Istvan
name: Voros, Mihaly
Publisher: name: Unknown
Year: 1999
Subjects: Community/Rural/Urban Development
Research and Development/Tech Change/Emerging Technologies

description: This paper comprises some relevant experience gained by a joint bilateral project between Hungary and Italy, on the title of uAdvanced Management and Innovation for Integrated and Sustainable Rural Development”, to be implemented between 1998 and 2000. In the last five years the partners have been carried out an intensive collaboration in the topic (exchange visits in previous bilateral project, joint participation and presentations in different international events, organizing workshops and conferences in Hungary, Italy, Romania and Serbia etc.). Hungary, under a thorough transition and facing EU accession, has been working on restructuring its agricultural policy towards a bigger market orientation, as well as on an emphasis on the regional aspects and rural development, considering domestic needs as well as following the guidelines and predictable requirements of AGENDA 2000. The recent shortage of relevant farm management information and lack of an operating and effective extension system can hinder or distort relevant management decisions at farm business level. This fact emphasizes Ihe importance of the education and training development as well as the necessity of regional extension.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Consistent coupling of positions and rotations for embedding 1D Cosserat beams into 3D solid volumes
Creators: name: Steinbrecher, Ivo
name: Popp, Alexander
name: Meier, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: This article proposes a mortar type finite element formulation for consistently embedding curved, slender beams, i.e. 1D Cosserat continua, into 3D solid volumes. A consistent 1D-3D coupling scheme for this problem type is proposed, which enforces both positional and rotational constraints. Since Boltzmann continua exhibit no inherent rotational degrees of freedom, suitable definitions of orthonormal triads are investigated that are representative for the orientation of material directions in the 3D solid. The rotation tensor defined by the polar decomposition of the deformation gradient is demonstrated to represent these material directions in a L2-optimal manner. Subsequently, objective rotational coupling constraints between beam and solid are formulated and enforced in a variationally consistent framework. Eventually, finite element discretization of all primary fields results in an embedded mortar formulation for rotational and translational constraint enforcement. Based on carefully chosen numerical test cases, the proposed scheme is demonstrated to exhibit a consistent spatial convergence behavior and to offer the up-scaling potential for studying real-life engineering applications such as fiber-reinforced composite materials.
description: 32 pages, 28 figures
The investigation of EPR paramagnetic probe line width and shape temperature dependence in high-temperature superconductors of Bi-Pb-Sr-Ca-Cu-O system
Creators: name: Chigvinadze, J. G.
name: Acrivos, J. V.
name: Akhvlediani, I. G.
name: Chubabria, M. I.
name: Kalabegishvili, T. L.
name: Sanadze, T. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The work is related with the finding out of magnetic phases in strongly anisotropic high-temperature superconductor Bi1,7Pb0,3Sr2Ca2Cu3O10-d in the temperature region where the superconductor is in the normal state. It was studied the temperature dependence of the paramagnetic probe EPR line width. In the normal state at T>Tc near 175 K it was revealed a pick in the temperature dependence of line width. In this region it was observed the time increase of the line width with the characteristic time ~ 17 min. This shows the possibility of magnetic phase formation in this material.
description: 4 pages, 0 figures
Agribusiness Management Development Program
Creators: name: Cresswell, Gordon
name: Cooney, Ann
Publisher: name: Unknown
Year: 1999
Subjects: Agribusiness
Farm Management

description: In 1998, an Agribusiness Management Development Program was jointly developed by the Agriculture Institute of Management in Saskatchewan, Inc. (AIMS) and the Department of Agriculture Economics at the University of Saskatchewan. The program was offered in January 1999 to March 1999. This paper is a case study of the process of visioning, planning, developing atid delivering this executive training program for the first time. The Agribusiness Management Development Program was unique in several ways: it was the first agribusiness executive style program developed and offered in Western Canada; it was conceived and developed through the collaborative efforts of AIMS and the University of Saskatchewan; and it targeted the entire agribusiness system. The program was aimed at progressive farmers, agribusiness executives, managers, entrepreneurs and service providers who were keen to succeed and profit in their ventures. This paper looks at the process of developing an agribusiness executive program and highlights some of its unique features.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Classical potential describes martensitic phase transformations between the $α$, $β$ and $ω$ titanium phases
Creators: name: Hennig, R. G.
name: Lenosky, T. J.
name: Trinkle, D. R.
name: Rudin, S. P.
name: Wilkins, J. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A description of the martensitic transformations between the $α$, $β$ and $ω$ phases of titanium that includes nucleation and growth requires an accurate classical potential. Optimization of the parameters of a modified embedded atom potential to a database of density-functional calculations yields an accurate and transferable potential as verified by comparison to experimental and density functional data for phonons, surface and stacking fault energies and energy barriers for homogeneous martensitic transformations. Molecular dynamics simulations map out the pressure-temperature phase diagram of titanium. For this potential the martensitic phase transformation between $α$ and $β$ appears at ambient pressure and 1200 K, between $α$ and $ω$ at ambient conditions, between $β$ and $ω$ at 1200 K and pressures above 8 GPa, and the triple point occurs at 8GPa and 1200 K. Molecular dynamics explorations of the dynamics of the martensitic $α-ω$ transformation show a fast-moving interface with a low interfacial energy of 30 meV/Å$^2$. The potential is applicable to the study of defects and phase transformations of Ti.
description: 10 pages, 6 figures
The White Dwarf Population in NGC 1039 (M34) and the White Dwarf Initial-Final Mass Relation
Creators: name: Rubin, Kate H. R.
name: Williams, Kurtis A.
name: Bolte, M.
name: Koester, Detlev
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first detailed photometric and spectroscopic study of the white dwarfs (WDs) in the field of the ~225 Myr old (log tau_cl = 8.35) open cluster NGC 1039 (M34) as part of the ongoing Lick-Arizona White Dwarf Survey. Using wide-field UBV imaging, we photometrically select 44 WD candidates in this field. We spectroscopically identify 19 of these objects as WDs; 17 are hydrogen-atmosphere DA WDs, one is a helium-atmosphere DB WD, and one is a cool DC WD that exhibits no detectable absorption lines. We find an effective temperature (T_eff) and surface gravity (log g) for each DA WD by fitting Balmer-line profiles from model atmospheres to the observed spectra. WD evolutionary models are then invoked to derive masses and cooling times for each DA WD. Of the 17 DAs, five are at the approximate distance modulus of the cluster. Another WD with a distance modulus 0.45 mag brighter than that of the cluster could be a double-degenerate binary cluster member, but is more likely to be a field WD. We place the five single cluster member WDs in the empirical initial-final mass relation and find that three of them lie very close to the previously derived linear relation; two have WD masses significantly below the relation. These outliers may have experienced some sort of enhanced mass loss or binary evolution; however, it is quite possible that these WDs are simply interlopers from the field WD population. Eight of the 17 DA WDs show significant CaII K absorption; comparison of the absorption strength with the WD distances suggests that the absorption is interstellar, though this cannot be confirmed with the current data.
description: 24 pages, 13 figures. Accepted for publication in the Astronomical Journal. Figures 1, 2 and 3 reduced in resolution
Modeling Ice Friction for Vehicle Dynamics of a Bobsled with Application in Driver Evaluation and Driving Simulation
Creators: name: von Schleinitz, Julian
name: Wörle, Lukas
name: Graf, Michael
name: Schröder, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We provide an ice friction model for vehicle dynamics of a two-man bobsled which can be used for driver evaluation and in a driver-in-the-loop simulator. Longitudinal friction is modeled by combining experimental results with finite element simulations to yield a correlation between contact pressure and friction. To model lateral friction, we collect data from 44 bobsleigh runs using special sensors. Non-linear regression is used to fit a bob-specific one-track vehicle dynamics model to the data. It is applied in driving simulation and enables a novel method for bob driver evaluation. Bob drivers with various levels of experience are investigated. It shows that a similar performance of the top drivers results from different driving styles.
description: Preprint submitted to Tribology International
Valence Quark Polarization In the Nucleon And the Deuteron Data
Creators: name: Arash, Firooz
name: Taghavi-Shahri, Fatemeh
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Within the framework of the so-called "valon" model, we argue that a substantial part of the nucleon spin, about 40%, is carried by the polarized valence quarks. The remaining is the result of cancellations between gluon polarization and the orbital angular momentum, where the gluon polarization is the dominant one. It is shown that the sea quark contribution to the spin of any hadron is simply marginal and consistent with zero. Our findings point to a substantially smaller value for a_8 thaninferred from hyperon- $β$ decay, suggesting that fullSU(3) symmetric assumption needs to be reconsidered. New and emerging experimental data tend to support this finding. Finally, we show that within the model described here the experimental data on the polarized structure functions $g_{1}^{p,n,d}$ are reproduced.
description: 12 pages, 5 figures To appear in Phys. Lett. B
On data lake architectures and metadata management
Creators: name: Sawadogo, Pegdwendé
name: Darmont, Jérôme
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Over the past two decades, we have witnessed an exponential increase of data production in the world. So-called big data generally come from transactional systems, and even more so from the Internet of Things and social media. They are mainly characterized by volume, velocity, variety and veracity issues. Big data-related issues strongly challenge traditional data management and analysis systems. The concept of data lake was introduced to address them. A data lake is a large, raw data repository that stores and manages all company data bearing any format. However, the data lake concept remains ambiguous or fuzzy for many researchers and practitioners, who often confuse it with the Hadoop technology. Thus, we provide in this paper a comprehensive state of the art of the different approaches to data lake design. We particularly focus on data lake architectures and metadata management, which are key issues in successful data lakes. We also discuss the pros and cons of data lakes and their design alternatives.
Las relaciones económicas entre España y el Magreb durante los siglos XVI y XVII
Creators: name: Martin-de-Santos, Ines
name: Martin-Vega, Arturo
Publisher: name: Zenodo
Year: 2011
Subjects: Economía - comercio - España - Magreb - siglo XVI - Siglo XVII

description: Se realiza una breve introducción histórica del período seleccionado. Se destaca el sabir o lengua franca como coiné empleada por los navegantes del Mediterráneo en las relaciones comerciales de diferentes culturas. Se presenta un análisis de las obras más importantes para estudiar las relaciones económicas entre España y el Magreb durante el reinado de los Austrias a partir de los libros de viajes, de los tratados de la época y de estudios recientes. Se comenta la importancia de la colección de D. Tomás García Figueras. Se añaden las principales fuentes de información secundaria para posteriores desarrollos de este tema, así como una bibliografía analítica y crítica.
Symplectically aspherical manifolds
Creators: name: Kedra, Jarek
name: Rudyak, Yuli
name: Tralle, Aleksy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C15

description: This is a survey article on symplectically aspherical manifolds. The paper contains a discussion on constructions of symplectically aspherical manifolds, their topological properties and the role of this class in symplectic topology. Research perspectives are discussed.
description: AMSLaTeX, corrected version
Strumigenys mutica
Creators: name: Tang, Kit Lam
name: Guénard, Benoit
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Strumigenys
Strumigenys mutica

description: Strumigenys mutica (Brown, 1949)
Fig. 32A–F; Table 2
Kyidris mutica Brown, 1949b: 3, fig. 1 (w.) JAPAN. Palearctic.
Polyhomoa itoi Azuma, 1950: 36, figs. (synonymized by Brown & Yasumatsu 1951: 94).
Kyidris nuda Brown, 1949b: 23 (synonymized by Brown 1952: 124).
Pyramica mutica – Bolton 1999: 1672.
Strumigenys mutica – Baroni Urbani & De Andrade 2007: 124.
Material examined
MAINLAND CHINA – Hainan Province • 30 workers; Bawangling, BWLP4; 19.09217° N, 109.2017° E; 3 Jul. 2016; L. Wang leg.; Winkler, 4 corners; IBBL. – Yunnan Province • 5 workers; Dali; 29 Jul.–4 Aug. 2006; S. Onoda leg.; KUM • 2 workers; Jinghong; 7–12 Aug. 2006; S. Onoda leg.; KUM.
VIETNAM – Đắk Nông Province • 1 worker; Nam Nung Reserve; 12.2045° N, 107.75543° E; 883 m a.s.l.; 9 Jun. 2018; IBBL members leg.; Winkler; IBBL. – Đ ỗng Nai Province • 37 workers; Cat Tien National Park; 11.43382° N, 107.42485° E; 139 m a.s.l.; 3 Jun. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 11 workers; Cat Tien National Park; 11.4327° N, 107.25556° E; 137 m a.s.l.; 3 Jun. 2018; IBBL members leg.; Winkler, 4 corners; IBBL ANTWEB1011953.
Geographic range
Borneo, mainland China (Guangxi, Hainan, Hong Kong, Hunan, Sichuan, Yunnan), India, Indonesia (Borneo, Java, Lesser Sunda Islands), Japan, Malaysia, Singapore, South Korea, Taiwan, Vietnam (Đắk Nông, Đồng Nai).
New record for Hainan and Vietnam.
Ecology
Collected in primary and secondary forest, at elevations from 137 to 883 m.
Comments
This species has been collected in Japan, South Korea, Taiwan and multiple provinces in southern China. Its record in Hainan (Fig. 32A–C) could indicate that the current disjunction in geographical range along the coastal region of mainland China is another example of undersampling. Given the new record in Vietnam (Fig. 32D–F), its presence in Cambodia, Laos and Thailand is also likely.
description: Published as part of Tang, Kit Lam & Guénard, Benoit, 2023, Further additions to the knowledge of Strumigenys (Formicidae: Myrmicinae) within South East Asia, with the descriptions of 20 new species, pp. 1-144 in European Journal of Taxonomy 907 on pages 95-96, DOI: 10.5852/ejt.2023.907.2327, http://zenodo.org/record/10148811
Dynamically SUSY Breaking SQCD on F-Theory Seven-Branes
Creators: name: Buchbinder, Evgeny I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study how dynamically breaking SQCD can be obtained on two intersecting seven-branes in F-theory. In the mechanism which we present in this paper one of the seven-branes is responsible for producing the low-energy gauge group and the other one is for generating vector bundle moduli. The fundamental matter charged under the gauge group is localized on the intersection. The mass of the matter fields is controlled by the vector bundle moduli. The analysis of under what conditions a sufficient number of the fundamental flavors becomes light turns out to be equivalent to the analysis of non-perturbative superpotentials for vector bundle moduli in Heterotic M-theory. We give an example in which we present an explicit equation in the moduli space whose zero locus corresponds to the fundamental fields becoming light. This allows us to provide a local F-theory realization of massive ${\cal N}=1$, $SU(N_c)$ SQCD in the free magnetic range which dynamically breaks supersymmetry.
description: 40 pages. v2:references added; v3:minor changes, version published in JHEP
The Problem Solving Processes Used by Farm Management Consultants
Creators: name: Gray, D.
name: Kemp, E.
name: Gardner, J.
Publisher: name: Unknown
Year: 1999
Subjects: Farm Management

description: Little is known about consultants' problem solving processes. Literature on problem solving from outside the farm management discipline was reviewed. A multiple-case study approach was used to investigate the problem solving processes employed by two expert consultants. The study found that the consultants spent considerable time on situation awareness and limited time on option analysis. Critical aspects of the problem solving process the consultants used included: relevant cue recognition, diagnosis using feature watching and story building, reliance on detailed classification schema, and option selection from detailed repertoire.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Ceraphron barbieri Dessart 1975
Creators: name: Trietsch, Carolyn
name: Mikó, István
name: Deans, Andrew R.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ceraphronidae
Ceraphron
Ceraphron barbieri

description: Ceraphron barbieri Dessart, 1975
Fig. 10
 Ceraphron barbieri Dessart, 1975: 47, 50, ♂, ♀. ZMUC, ISNB, MNHN, MHNG. Keyed.
 Ceraphron (Allomicrops) barbieri – Dessart 1981a: 3. Subgeneric assignment.   Material examined
 Allotype
FRANCE • ♀; “ Contre mur / dans la / maison, Dijon / 4–VIII–1973 / C. D’or. J. Barbier ” (Dessart 1975: 49); MNHN EY25349, EY22449.  Distribution
Nearctic and palearctic.  Comments
Dessart described the species from three male and two female specimens. According to Dessart (1975), the male holotype and one male paratype are deposited at the Zoological Museum at the University of Copenhagen, Denmark (ZMUC), which was indicated in Johnson & Musetti (2004). However, missing from Johnson & Musetti (2004), there is another male paratype at the Institut Royal des Sciences Naturelles de Belgique, Bruxelles, Belgium (ISNB), a female paratype in the Cl. Bésuchet collection in the Muséum d’Histoire Naturelle, Geneva, Switzerland (MHNG), and a female allotype in the J. Barbier collection in the MNHN. The female allotype specimen is card mounted (MNHN EY25349), and there is one microscope preparation (prép. no. 7312/141) with the right antenna (MNHN EY22449).
 There are a few errors and inconsistencies in the original publication. Dessart (1975) gives the identifier used for the allotype specimen as “N°7312/111”, but the actual number on both the specimens and the slides is N°7312/141. The label information given in the paper matches the specimen, although Dessart (1975: 49) reports an additional label saying “Contre mur / dans la / maison” which is missing from the actual specimen. Still, there is no doubt that this is the allotype specimen Dessart studied in describing Ceraphron barbieri.
description: Published as part of Trietsch, Carolyn, Mikó, István & Deans, Andrew R., 2019, A photographic catalog of Ceraphronoidea types at the Muséum national d'Histoire naturelle, Paris (MNHN), with comments on unpublished notes from Paul Dessart, pp. 1-60 in European Journal of Taxonomy 502 on pages 20-22, DOI: 10.5852/ejt.2019.502, http://zenodo.org/record/2581898
Global Trends in Agriculture and Agribusiness
Creators: name: Hansen, Henning Otte
Publisher: name: Unknown
Year: 1999
Subjects: Agribusiness
International Relations/Trade

description: The economical, political and market related parameters for the agricultural sector are in process of a heavy change these years. Common trends are seen across bor- ders and across continents.
The agricultural policy is liberalised, and importance is increasingly attached to environment, food security and rural development. At the same time is happening a change of system with regards to the agricultural policy, which is changed from being focused on the sector to being focused on the farmers. Both the liberalisation as well as the globalisation will mark the agricultural sector in future. The liberalisation will cause a more well acting world market and the trade will increase. The globalisation will cause a rise in the international trade and the specialisation, but also the foreign investments will become more important in future. There is also a global trend towards a gradual industrialisation of the agricultural sector. The farms are getting bigger, more specialised and concentrated, the productivity is strongly increasing, whereas the terms of trade is continuously decreasing. The demand is only slightly developing. The global trend is, that the growth is slight, but that areas as convenience, dining out, functional foods, health and food security are areas or parameters with relatively large growth. The agro-industry also develops according to the global trends. The companies are getting bigger, more concentrated and transnational. At the same time global alliances become more and more prevalent. The retail sector - which is often an important target group for the agriculture and the agro-industry - also develops considerably these years. The structural development is strong, the concentration is increasing, and the retail sector is gaining more market influence and power through increased integration, private labels, etc.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Extreme values of zeta prime rho
Creators: name: Ng, Nathan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M26

description: In this article we exhibit small and large values of $ζ'(ρ)$ by applying Soundararajan's resonance method. Our results assume the Riemann hypothesis.
description: 16 pages
The Galactic metallicity gradient shown by open clusters in the light of radial migration
Creators: name: Netopil, Martin
name: Oralhan, İnci Akkaya
name: Çakmak, Hikmet
name: Michel, Raúl
name: Karataş, Yüksel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: During the last years and decades several individual studies and large-scale spectroscopic surveys significantly improved our knowledge of the Galactic metallicity distribution based on open clusters. The availability of Gaia data provided a further step forward in our knowledge. However, still some open issues remain, for example the influence of radial migration on the interpretation of the observed gradients. We used spectroscopic metallicities from individual studies and from the APOGEE survey to compile a sample of 136 open clusters, with a membership verification based on Gaia DR2. Additionally, we present photometric metallicity estimates of 14 open clusters in a somewhat outer Galactic region. Eight age groups allow us to study the evolution of the metallicity gradient in detail, showing within the errors an almost constant gradient of about $-$0.06 dex kpc$^{-1}$. Furthermore, using the derived gradients and an analysis of the individual objects, we estimate a mean migration rate of 1 kpc Gyr$^{-1}$ for objects up to about 2 Gyr. Here, the change of the guiding radius is clearly the main contributor. For older and dynamically hotter objects up to 6 Gyr we infer a lower migration rate of up to 0.5 kpc Gyr$^{-1}$. The influence of epicyclic excursions increases with age and contributes already about 1 kpc to the total migration distance after 6 Gyr. A comparison of our results with available models shows good agreement. However, there is still a lack of a suitable coverage of older objects, future studies are still needed to provide a better sampling in this respect.
description: 21 pages, 30 figures, accepted by Monthly Notices of the Royal Astronomical Society
The Need for Farm Management Skills in Africa
Creators: name: Heney, Jennifer
Publisher: name: Unknown
Year: 1999
Subjects: Farm Management

description: Farming is the principal means of livelihood in rural Africa. As in all parts of the world, these farmers are facing enormous challenges in the 21st century as they adapt to competitive markets, environmental degradation, economic instability and new technologies. For many farmers in Africa poverty, malnutrition, poor roads, long distances and inadequate education compound the challenge. Farm management techniques have evolved over the years to help farmers cope with challenges. They help farmers analyse situations and take informed decisions about the best way forward. Small-scale farmers in Africa need these techniques but extension services rarely offer them, concentrating more on production technology transfer. This paper argues that much more effort is needed to bring practical fatm management skills to these farmers, adapting the techniques as necessary and teaching them in innovative ways that overcome literacy and numeracy constraints. Extension staff themselves need to be more business oriented and better informed about markets, money and farm management methods.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Map reading : the object is to form a true mental picture of the ground
Creators: name: Smith, Gordon E.
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to determine if student map users create a three-dimensional mental image of the landscape depicted by a topographic map. A review of previous research clearly indicates that human beings can and do form three-dimensional mental images. Since a topographic map is a form of cartographic communication in which the cartographer using an appropriate symbol system attempts to represent a real landscape, it follows that a map user who shares the same symbol system should be able to transform the symbols into a three-dimensional mental image of the original landscape. To be successful this cartographic communication requires that both cartographer and map-user share a common symbol system and, further, that the map-user is able to make the transformation from map to three-dimensional mental image. It is hypothesized that both of these requirements can be met. To test these hypotheses a quasi-experimental research design using an experimental and a control group and a pretest-posttest format was chosen. Two groups of Grade 10 and two groups of Grade 12 students participated in the study with one group from each grade in the experimental group and the other acting as a control group. To evaluate the mental image formed students were asked to draw a representation of a mental image and also to write a description of one. The results of the research clearly support the hypothesis that cartographer and map user can share a common symbol system. While the attempt to draw a representation of a mental image was largely unsuccessful, the written descriptions clearly support the hypothesis that map users can and do form three-dimensional mental images of landscapes depicted by topographic maps. The results also suggest a possibility that the ability to form complex three-dimensional, mental images may in part be a function of maturation.
Homogeneity of the Photocathode in the Hamamatsu R15458-02 Photomultiplier Tube
Creators: name: Elorrieta, M. A. Unland
name: Busse, R. S.
name: Classen, L.
name: Kappes, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: It is common practice to test the optical properties of photomultiplier tubes (PMTs) by illuminating the entire photocathode region from the front at once and measuring the average performance. However, for optimal utilisation of the PMT performance in experiments, especially in the single-photon region, it is essential to also know the systematic variations across the photocathode, which requires measurements with focused light sources that illuminate only small regions of the PMT. We present a detailed uniformity characterisation of the gain, transit time, transit time spread, and pulse shape of the 80$\,$mm Hamamatsu R15458-02 PMT. We find that the parameters exhibit asymmetry along one axis, likely caused by the position and geometry of the dynode system. For all parameters except the transit time, the observed variations are small given the intrinsic variation of the parameters. For positions with shifted transit time we observe on average underamplified pulses which can potentially be exploited to improve the pulse reconstruction.
description: accepted version
Molecular motors: design, mechanism and control
Creators: name: Chowdhury, Debashish
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Popular Physics (physics.pop-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Biological functions in each animal cell depend on coordinated operations of a wide variety of molecular motors. Some of the these motors transport cargo to their respective destinations whereas some others are mobile workshops which synthesize macromolecules while moving on their tracks. Some other motors are designed to function as packers and movers. All these motors require input energy for performing their mechanical works and operate under conditions far from thermodynamic equilibrium. The typical size of these motors and the forces they generate are of the order of nano-meters and pico-Newtons, respectively. They are subjected to random bombardments by the molecules of the surrounding aqueous medium and, therefore, follow noisy trajectories. Because of their small inertia, their movements in the viscous intracellular space exhibits features that are characteristics of hydrodynamics at low Reynold's number. In this article we discuss how theoretical modeling and computer simulations of these machines by physicists are providing insight into their mechanisms which engineers can exploit to design and control artificial nano-motors.
description: 11 pages, including 8 embedded EPS figures; Invited article, accepted for Publication in "Computing in Science and Engineering" (AIP & IEEE)
Orbital liquid in ferromagnetic manganites: The orbital Hubbard model for $e_g$ electrons
Creators: name: Feiner, Louis Felix
name: Oles, Andrzej M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have analyzed the symmetry properties and the ground state of an orbital Hubbard model with two orbital flavors, describing a partly filled spin-polarized $e_g$ band on a cubic lattice, as in ferromagnetic manganites. We demonstrate that the off-diagonal hopping responsible for transitions between $x^2-y^2$ and $3z^2-r^2$ orbitals, and the absence of SU(2) invariance in orbital space, have important implications. One finds that superexchange contributes in all orbital ordered states, the Nagaoka theorem does not apply, and the kinetic energy is much enhanced as compared with the spin case. Therefore, orbital ordered states are harder to stabilize in the Hartree-Fock approximation (HFA), and the onset of a uniform ferro-orbital polarization and antiferro-orbital instability are similar to each other, unlike in spin case. Next we formulate a cubic (gauge) invariant slave boson approach using the orbitals with complex coefficients. In the mean-field approximation it leads to the renormalization of the kinetic energy, and provides a reliable estimate for the ground state energy of the disordered state. Using this approach one finds that the HFA fails qualitatively in the regime of large Coulomb repulsion $U\to\infty$ -- the orbital order is unstable, and instead a strongly correlated orbital liquid with disordered orbitals is realized at any electron filling.
description: 25 pages, 9 figures
Unification of bulk and interface electroresistive switching in oxide systems
Creators: name: Ruotolo, A.
name: Leung, C. W.
name: Lam, C. Y.
name: Cheng, W. F.
name: Wong, K. H.
name: Pepe, G. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate that the physical mechanism behind electroresistive switching in oxide Schottky systems is electroformation, as in insulating oxides. Negative resistance shown by the hysteretic current-voltage curves proves that impact ionization is at the origin of the switching. Analyses of the capacitance-voltage and conductance-voltage curves through a simple model show that an atomic rearrangement is involved in the process. Switching in these systems is a bulk effect, not strictly confined at the interface but at the charge space region.
description: 4 pages, 3 figures, accepted in PRB
Lipolexis bengalensis Tomanovic & Kocic 2020
Creators: name: Kerkig, Pornthap
name: Quicke Minoo Heidari Latibari, Donald L. J.
name: Butcher, Buntika A.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Lipolexis
Lipolexis bengalensis

description: Lipolexis bengalensis Tomanović & Kocić, 2020
Type information. Holotype female (CNC) and paratype females (FBUB).
Distribution. Oriental (Bangladesh).
Host. Unknown.
description: Published as part of Kerkig, Pornthap, Quicke Minoo Heidari Latibari, Donald L. J. & Butcher, Buntika A., 2025, World checklist of the genus Lipolexis Förster (Hymenoptera, Braconidae, Aphidiinae) with description of a new species from Thailand, pp. 323-336 in Zootaxa 5613 (2) on page 327, DOI: 10.11646/zootaxa.5613.2.7, http://zenodo.org/record/15216637
Effective dislocation lines in continuously dislocated crystals. III. Kinematics
Creators: name: Trzesowski, Andrzej
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A class of congruences of principal Volterra-type effective dislocation lines associated with a dislocation density tensor is distinguished in order to investigate the kinematics of continuized defective crystals in terms of their dislocation densities (tensorial as well as scalar). Moreover, it shown, basing oneself on a formula defining the mean curvature of glide surfaces for principal edge effective dislocation lines, that the considered kinematics of continuized defective crystals is consistent with some relations appearing in the physical theory of plasticity (e.g. with the Orowan-type kinematic relations and with the treatment of shear stresses as driving stresses of moving dislocations).
description: Keywords. Anholonomity, crystal surfaces, dislocation density, dislocation speed, glide surfaces, instantaneous metric tensor, Killing vector, kinematics, material flow, Orowan kinematic relation, rate of stretchings, time-dependent Bravais moving frame
Correlation between galactic HI and the Cosmic Microwave Background
Creators: name: Land, Kate
name: Slosar, Anze
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We revisit the issue of a correlation between the atomic hydrogen gas in our local Galaxy and the Cosmic Microwave Background (CMB), a detection of which has been claimed in some literature. We cross-correlate the 21-cm emission of Galactic atomic hydrogen as traced by the Leiden/Argentine/Bonn Galactic HI survey with the 3-year CMB data from the Wilkinson Microwave Anisotropy Probe. We consider a number of angular scales, masks, and HI velocity slices and find no statistically significant correlation.
description: 4 pages, 4 figures, accepted in PRD brief report
Analyzing capacitance-voltage measurements of vertical wrapped-gated nanowires
Creators: name: Karlström, O.
name: Wacker, A.
name: Nilsson, K.
name: Astromskas, G.
name: Roddaro, S.
name: Samuelson, L.
name: Wernersson, L. -E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The capacitance of arrays of vertical wrapped-gate InAs nanowires are analyzed. With the help of a Poisson-Schr"odinger solver, information about the doping density can be obtained directly. Further features in the measured capacitance-voltage characteristics can be attributed to the presence of surface states as well as the coexistence of electrons and holes in the wire. For both scenarios, quantitative estimates are provided. It is furthermore shown that the difference between the actual capacitance and the geometrical limit is quite large, and depends strongly on the nanowire material.
description: 15 pages, 6 Figures included, to appear in Nanotechnology
How Australian Farm Women Share Their Management Skills
Creators: name: Jarvis, Ann
Publisher: name: Unknown
Year: 1999
Subjects: Farm Management
Labor and Human Capital

description: The future role of rural women in decision making, demands keeping pace with the rapid changes experienced in agriculture. These significant changes influence women’s role in management decisions in rural Australia, requiring acceptance of their participation at ‘higher levels'. To achieve this ‘breaking down ’ of prejudice, knowledge and skills training must be available to all rural people. The development of women's confidence, self worth and credibility is essential, but so too is the progress of male learning skills, abilities and expectations. Communicating leads to understanding and tolerance. This requires active listening and respect for diverse opinions. Sharing this information willingly, will achieve mutual benefits. Recognising, valuing and utilising this accumulated wisdom, will create harmony. Initiatives that helped women to lead during difficult times in farming, proved their value ‘on farm Expanding these into all aspects of Agriculture, will ensure integrity and balance in deciding future policy development.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999
Participatory Continuous Farm Management Training in Adults. Learning and Experiences from Two Cereal Crops Areas in Colombia
Creators: name: Jimenez, F.
name: Romero, J.R.
name: Villamil, L.C.
Publisher: name: Unknown
Year: 1999
Subjects: Farm Management
Teaching/Communication/Extension/Profession

description: Adult farmer training is a key issue of farm management programmes in developing countries. This document shows FUNDESAGRO ’ team experiences of participatory continuous farm management training in two commercial cereal crops areas in Colombia, South America. Framers’ empowerment to apply farm management basic tools on farm and corporate levels was the training aim. The training process, starting with farmers' selection and involvement and training strategies (workshops, case studies and farm visits) are described. Participation and corporate work to solve communal problems are highlighted Finally, conclusions and learning are summarised and some recommendations are presented to further applications in developing countries.
description: Twelfth International Farm Management Congress, Durban, South Africa, July 18-24, 1999