cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interactions between a web site and its customers : a relationship building approach
Creators: name: Kumar, M. S. N.
Publisher: name: University of British Columbia
Year: 2009

description: This research makes a case for treating an electronic commerce web site as a social actor and argues that LT-enabled support for personalization systems and virtual communities has a significant impact on the perceived communication characteristics of a web site. This research studied the impact of two communication characteristics - adaptiveness and connectivity of a web site. Adaptiveness indicates the extent to which a web site adapts itself to support the needs of its customers whereas connectivity refers to the ability of a web site to link potential customers with other visitors. Further, synthesizing research from communication, media choice and technology adoption literatures, this thesis proposes social presence as the experiential construct and perceived usefulness as the utilitarian construct that will mediate the relationship between communication characteristics of a medium and customer loyalty. A survey and a laboratory experiment were conducted to test the linkages proposed above. The survey showed that while adaptiveness impacted on both social presence and perceived usefulness, connectivity had an impact only on social presence and an insignificant impact on perceived usefulness. Social presence did not influence perceived usefulness while both social presence and perceived usefulness had a significant impact on customer loyalty. By filtering Amazon.com real-time, the lab experiment was conducted to specifically study the causal impact of a web site's support for personalization and virtual communities. Support for personalization had a strong impact on adaptiveness, whereas support for consumer reviews had strong effect on connectivity. Interestingly, support for personalization had a weaker, but significant effect on connectivity and support for consumer reviews had a similar effect on adaptiveness. Data from the experiment was also analyzed using mediation analyses as well as partial least square analysis to show that the general pattern of results observed were consistent across methods thus improving the confidence in the research model proposed. This research by proposing social presence as a crucial experiential predictor of customer loyalty has addressed an important gap that exists in our current understanding of web users' behavior. It also makes a key contribution by empirically showing that a web site's support for IT-enabled personalization and virtual communities do have a significant impact not only on the perceived communication characteristics, but also on customer loyalty through social presence and perceived usefulness.
Optical properties of the NGC 5328 group of galaxies
Creators: name: Gruetzbauch, R.
name: Annibali, F.
name: Bressan, A.
name: Focardi, P.
name: Kelm, B.
name: Rampazzo, R.
name: Zeilinger, W. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a photometric and spectroscopic study of seven members of the NGC 5328 group of galaxies, a chain of galaxies spanning over 200 kpc (H_0 = 70 km/s/Mpc). We analyze the galaxy structure and study the emission line properties of the group members looking for signatures of star formation and AGN activity. We finally attempt to infer, from the modeling of line-strength indices, the stellar population ages of the early-type members. We investigate also the presence of a dwarf galaxy population associated with the bright members. The group is composed of a large fraction of early-type galaxies including NGC 5328 and NGC 5330, two bona fide ellipticals at the center of the group. In both galaxies no recent star formation episodes are detected by the H_beta vs. MgFe indices of these galaxies. 2MASX J13524838-2829584 has extremely boxy isophotes which are believed to be connected to a merging event: line strength indices suggest that this object probably had a recent star formation episode. A warped disc component emerges from the model subtracted image of 2MASX J13530016-2827061 which is interpreted as a signature of an ongoing interaction with the rest of the group. Ongoing star formation and nuclear activity is present in the projected outskirts of the group. The two early-type galaxies 2MASX J13523852-2830444 and 2MASX J13525393-2831421 show spectral signatures of star formation, while a Seyfert 2 type nuclear activity is detected in MCG -5-33-29.
description: 18 pages, 12 figures, accepted for publication in MNRAS
MANAGEMENT VON QUALITÄTSDATEN - EINE EMPIRISCHE ANALYSE IN WERTSCHÖPFUNGSKETTEN DER ÖKOLOGISCH WIRTSCHAFTENDEN SCHWEINEBETRIEBE IN DEUTSCHLAND
Creators: name: Hoffmann, Christa
name: Doluschitz, Reiner
name: Hoffmann, Christa
name: Doluschitz, Reiner
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Informationsmanagement
subject: Ökologische Schweinefleischproduktion
subject: Wertschöpfungskette
subject: Qualität

description: Forderungen nach mehr Qualität und Sicherheit von Lebensmitteln nehmen nach wie vor starken Einfluss auf das Marktgeschehen. Auch die Erzeugung von ökologischen Schweinefleischprodukten ist durch die harmonisierte EU-Gesetzgebung davon betroffen. Nicht nur die EU-ÖKO-VO 834/2007, sondern auch weitere, in den vergangenen Jahren umfangreicher gewordene gesetzlichen Anforderungen an die Produktion von Lebensmitteln, wie z.B. das Lebensmittelhygienepaket (EU VO 852/2004, 853/2004 und 854/2004), stellen nicht nur die konventionellen Betriebe vor neue Herausforderungen. Mit den kontinuierlich zunehmenden Qualitätsanforderungen gehen verbindliche Dokumentationsverpflichtungen einher. Die zusätzlich stetig ansteigenden Datenmengen entlang der Wertschöpfungskette führen zudem zu einer zunehmenden Komplexität in der Datenauswertung und Informationsselektion. Nur durch ein effizientes Management der Daten, im Sinne der Aufbereitung zielführender Informationen, kann diesen Entwicklungen begegnet werden. Das Ziel dieser Studie ist es durch effizientere Datennutzung einen Beitrag für höhere Standards in der Lebensmittelsicherheit zu leisten. Realisiert wird dies durch eine Status quo Analyse des Informationsmanagements in deutschen, ökologisch produzierenden schweinehaltenden Betrieben. An dessen Ende steht die Erarbeitung eines Konzeptes zur Verbesserung des überbetrieblichen Informationsmanagements in Ketten der ökologischen Schweinefleischerzeugung.
description: A1_3
title: Developing a novel 3D alginate platform for investigating the patterned diﬀerentiation of mouse embryonic stem cells
Creators: name: Fannon, Orla
Publisher: name: University of Reading
Year: 2018

description: Standard 2D cell culture does not recreate the complex features of the in vivo environment, such as soluble factor gradients, cell migration into multiple planes, or cell-cell and cell-matrix interactions.1–3 3D cell culture addresses these limitations by using 3D biomaterial scaffolds, such as alginate hydrogels, to recreate the in vivo cell microenvironment in vitro. 4, 5 3D platforms can be used to create gradients of soluble factors, vary the biomaterial substrate stiffness, permit cell-matrix interactions or promote cell migration.6, 7 Currently available 3D platforms are prone to the burst release of soluble factors from the biomaterials, making it difficult to tightly control the soluble factor concentration.7 This limits the use of 3D platforms for investigating processes such as patterned neuronal differentiation, or cell fate specification in response to small changes in soluble factor concentration. This project proposes a novel 3D alginate platform for patterned differentiation. The first part of this thesis describes experiments to optimise alginate hydrogels for the encapsulation, aggregation and differentiation of embryonic stem cells (ESCs), and demonstrates that encapsulated ESCs form embryoid bodies containing cells from the three germ layers. Exogenous retinoic acid (RA) is used for in vitro neuronal differentiation protocols, but exogenous RA is not stable in cell culture and is easily degraded by light. The second part of the thesis outlines experiments to validate a cell-derived source of RA, which produces a stable concentration of RA in vitro and addresses the limitations of exogenous RA. The final section describes the novel 3D platform that combines the results from the previous sections using an adapted gradient maker protocol, to create 3D co-culture alginate tubes. The tubes support patterned differentiation of ESCs in response to the concentration gradient of cell-derived RA incorporated into the platform. The novel 3D platform produced in this project contributes a novel tool to the field of 3D cell culture. The 3D platform is a tool for investigating ESC differentiation in response to a 3D concentration gradient of a cell-derived source of retinoic acid. For experiments that require a gradient of RA, the ability to maintain a stable source of RA over several days is an advantage of using this 3D platform over the currently available alternatives. In addition, alginate hydrogels are highly tunable. Thus, the ability to tune the scaffold properties, change the cell types encapsulated, or introduce gradients of alternative soluble factors makes this a versatile tool for 3D culture.
Additional file 2 of Improving the health of workers with a low socioeconomic position: Intervention Mapping as a useful method for adaptation of the Participatory Approach
Creators: name: Schaap, R.
name: F. G. Schaafsma
name: A. R. Bosma
name: M. A. Huysmans
name: C. R. L. Boot
name: J. R. Anema
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: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. Logic model of chance. A summary of the behavioral and environmental determinants, performance objectives and outcomes.
Massive Black Hole Binaries from Collisional Runaways
Creators: name: Gürkan, M. Atakan
name: Fregeau, John M.
name: Rasio, Frederic A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent theoretical work has solidified the viability of the collisional runaway scenario in young dense star clusters for the formation of very massive stars (VMSs), which may be precursors to intermediate-mass black holes (IMBHs). We present first results from a numerical study of the collisional runaway process in dense star clusters containing primordial binaries. Stellar collisions during binary scattering encounters offer an alternate channel for runaway growth, somewhat independent of direct collisions between single stars. We find that clusters with binary fractions >~10% yield two VMSs via collisional runaways, presenting the exotic possibility of forming IMBH--IMBH binaries in star clusters. We discuss the implications for gravitational wave observations, and the impact on cluster structure.
description: 4 pages with emulateapj. To appear in ApJ letters. Minor revisions to include the changes suggested by the referee
That is a Known Lie: Detecting Previously Fact-Checked Claims
Creators: name: Shaar, Shaden
name: Martino, Giovanni Da San
name: Babulkov, Nikolay
name: Nakov, Preslav
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: I.2.7
subject: 68T50

description: The recent proliferation of "fake news" has triggered a number of responses, most notably the emergence of several manual fact-checking initiatives. As a result and over time, a large number of fact-checked claims have been accumulated, which increases the likelihood that a new claim in social media or a new statement by a politician might have already been fact-checked by some trusted fact-checking organization, as viral claims often come back after a while in social media, and politicians like to repeat their favorite statements, true or false, over and over again. As manual fact-checking is very time-consuming (and fully automatic fact-checking has credibility issues), it is important to try to save this effort and to avoid wasting time on claims that have already been fact-checked. Interestingly, despite the importance of the task, it has been largely ignored by the research community so far. Here, we aim to bridge this gap. In particular, we formulate the task and we discuss how it relates to, but also differs from, previous work. We further create a specialized dataset, which we release to the research community. Finally, we present learning-to-rank experiments that demonstrate sizable improvements over state-of-the-art retrieval and textual similarity approaches.
description: detecting previously fact-checked claims, fact-checking, disinformation, fake news, social media, political debates
ORGANIC OR CONVENTIONAL? OPTIMAL DAIRY FARMING TECHNOLOGY UNDER THE EU MILK QUOTA SYSTEM AND ORGANIC SUBSIDIES
Creators: name: Breustedt, Gunnar
name: Latacz-Lohmann, Uwe
name: Tiedemann, Torben
name: Breustedt, Gunnar
name: Latacz-Lohmann, Uwe
name: Tiedemann, Torben
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agricultural and Food Policy
subject: Organic farming
subject: EU milk quota
subject: Data Envelopment Analysis
subject: subsidy payments

description: We analyse the relative competitiveness between organic and conventional dairy farming under different hypothetical agricultural policies using a DEA-based comparison of each farm’s earning potential in both technologies. This model allows us to identify a farm’s ex post optimal technology based on input-output observations. Results for Bavarian dairy farms indicate that more than 70% of the farms in both technologies – organic and conventional – have chosen their optimal farming system. The remaining organic (conventional) farmers could increase their profit by roughly 7% (18%) on average by switching to the other technology. Abolishment of the EU milk quota reduces the number of sample farms for which organic farming is the optimal technology considerably. This finding suggests that ceteris paribus organic dairy farms may lose competitive advantage with the deregulation of the EU’s milk market regime in 2015. Simulations show, that this effect may be offset by a price decline for conventional milk of more than 10% relative to the price for organic milk. Another finding reveals that subsidies specifically paid to organic farmers roughly double the number of farms who have a higher earning potential in organic than in conventional dairy farming.
description: A1_4
title: Самостоятельные занятия физической культурой студентов высших учебных заведений
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2025

description: Учебное пособие содержит материал, обеспечивающий систематизацию и углубление знаний студентов по вопросам методики самостоятельных занятий физическими упражнениями и спортом, самоконтроля за уровнем физического развития и функционального состояния физиологических функций организма. В работе даны понятия основных физических качеств человека, приведены термины и формулы для расчета необходимых индексов. Подготовлено с учетом требований Федерального государственного образовательного стандарта высшего образования. Предназначено для студентов всех специальностей и направлений подготовки высшего образования, изучающих дисциплину «Физическая культура». Может быть полезно также при самостоятельных занятиях физическими упражнениями и спортом.
Neutrino Models of Dark Energy
Creators: name: Peccei, R. D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I consider a scenario proposed by Fardon, Nelson and Weiner where dark energy and neutrinos are connected. As a result, neutrino masses are not constant but depend on the neutrino number density. By examining the full equation of state for the dark sector, I show that in this scenario the dark energy is equivalent to having a cosmological constant, but one that "runs" as the neutrino mass changes with temperature. Two examples are examined that illustrate the principal feautures of the dark sector of this scenario. In particular, the cosmological constant is seen to be negligible for most of the evolution of the Universe, becoming inportant only when neutrinos become non-relativistic. Some speculations on features of this scenario which might be present in a more realistic theory are also presented.
description: 12 pages, 6 figures. Added comments on why FNW scenario always leads to a running cosmological constant and a few references. To be published in Phys. Rev. D
A K-Theory Proof of the Cobordism Invariance of the Index
Creators: name: Carvalho, Catarina
Publisher: name: arXiv
Year: 2004
Subjects: subject: K-Theory and Homology (math.KT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 19K56; 58J40, 57R99

description: We give a proof of the cobordism invariance of the index of elliptic pseudodifferential operators on sigma-compact manifolds, where, in the non-compact case, the operators are assumed to be multiplication outside a compact set. We show that, if the principal symbol class of such an elliptic operator on the boundary of a manifold X has a suitable extension to K^1(TX), then its index is zero. This condition is incorporated into the definition of a cobordism group for non-compact manifolds, called here ``cobordism of symbols''. Our proof is topological, in that we use properties of the push-forward map in K-theory defined by Atiyah and Singer, to reduce it to R^n. In particular, we generalize the invariance of the index with respect to the push-forward map to the non-compact case, and obtain an extension of the K-theoretical index formula of Atiyah and Singer to operators that are multiplication outside a compact set. Our results hold also for G-equivariant operators, where G is a compact Lie group.
description: 29 pages, LaTeX
First-principles study of the effective Hamiltonian for Dirac fermions with spin-orbit coupling in two-dimensional molecular conductor $α$-(BETS)$_2$I$_3$
Creators: name: Tsumuraya, Takao
name: Suzumura, Yoshikazu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We employed first-principles density-functional theory (DFT) calculations to characterize Dirac electrons in quasi-two-dimensional molecular conductor $α$-(BETS)$_2$I$_3$ [= $α$-(BEDT-TSeF)$_2$I$_3$] at a low temperature of 30K. We provide a tight-binding model with intermolecular transfer energies evaluated from maximally localized Wannier functions, where the number of relevant transfer integrals is relatively large due to the delocalized character of Se $p$ orbitals. The spin-orbit coupling gives rise to an exotic insulating state with an indirect band gap of about 2 meV. We analyzed the energy spectrum with a Dirac cone close to the Fermi level to develop an effective Hamiltonian with site-potentials, which reproduces the spectrum obtained by the DFT band structure.
description: The manuscript has been accepted for publication in the European Physical Journal B on Dec. 15th, 2020
Expanding Microenterprise Credit Access: Using Randomized Supply Decisions to Estimate the Impacts in Manila
Creators: name: Karlan, Dean S.
name: Zinman, Jonathan
name: Karlan, Dean S.
name: Zinman, Jonathan
Publisher: name: Unknown
Year: 2009
Subjects: subject: Financial Economics
subject: microfinance
subject: microcredit
subject: microentrepreneurship
subject: risk sharing
subject: formal and informal finance

description: Microcredit seeks to promote business growth and improve well-being by expanding access to credit. We use a field experiment and follow-up survey to measure impacts of a credit expansion for microentrepreneurs in Manila. The effects are diffuse, heterogeneous, and surprising. Although there is some evidence that profits increase, the mechanism seems to be that businesses shrink by shedding unproductive workers. Overall, borrowing households substitute away from labor (in both family and outside businesses), and into education. We also find substitution away from formal insurance, along with increases in access to informal risk-sharing mechanisms. Our treatment effects are stronger for groups that are not typically targeted by microlenders: male and higher-income entrepreneurs. In all, our results suggest that microcredit works broadly through risk management and investment at the household level, rather than directly through the targeted businesses.
The 2007/08 Iowa Grain and Biofuel Flow Study: A Survey Report
Creators: name: Yu, Tun-Hsiang (Edward)
name: Hart, Chad E.
name: Yu, Tun-Hsiang (Edward)
name: Hart, Chad E.
Publisher: name: Unknown
Year: 2009
Subjects: Agribusiness
Crop Production/Industries

description: Driven by the expanding production of biofuels, the linkage between the agricultural and energy markets is evolving, and that has changed the market for agricultural commodities dramatically. These developments in agricultural markets consequently shifted the distribution of domestic grains and feeds and the utilization of shipping modes for these agricultural products. As the leading producer of corn, soybeans, and biofuels, Iowa is at the forefront of this shift. Because of the importance of maintaining an adequate state transportation system to accommodate the evolving patterns of grain and biofuel flows, it is important to have current information about grain flows from farms and country elevators to destination markets, along with the information about transportation modes utilized for the shipments. Information about biofuel distribution is also crucial for agricultural and transportation policymakers so that they can provide relevant assistance for this growing industry. This study is designed to meet these needs and to provide updated information on grain and biofuel flows in Iowa during the 2006 and 2007 marketing years.
Bose-Einstein condensation and symmetry breaking
Creators: name: Suto, Andras
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Adding a gauge symmetry breaking field -ν\sqrt{V}(a_0+a_0^*) to the Hamiltonian of some simplified models of an interacting Bose gas we compute the condensate density and the symmetry breaking order parameter in the limit of infinite volume and prove Bogoliubov's asymptotic hypothesis \lim_{V\to\infty}< a_0>/\sqrt{V}={\rm sgn}ν\lim_{V\to\infty}\sqrt{< a_0^*a_0>/V} where the averages are taken in the ground state or in thermal equilibrium states. Letting νtend to zero in this equation we obtain that Bose-Einstein condensation occurs if and only if the gauge symmetry is spontaneously broken. The simplification consists in dropping the off-diagonal terms in the momentum representation of the pair interaction. The models include the mean field and the imperfect (Huang-Yang-Luttinger) Bose gas. An implication of the result is that the compressibility sum rule cannot hold true in the ground state of the one-dimensional mean-field Bose gas. Our method is based on a resolution of the Hamiltonian into a family of single-mode (k=0) Hamiltonians and on the analysis of the associated microcanonical ensembles.
description: 8 pages; to appear in Phys. Rev. A
A dispersionless integrable system associated to Diff$(S^1)$ gauge theory
Creators: name: Dunajski, Maciej
name: Sparling, George
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A dispersionless integrable system underlying 2+1-dimensional hyperCR Einstein--Weyl structures is obtained as a symmetry reduction of the anti--self--dual Yang--Mills equations with the gauge group Diff$(S^1)$. Two special classes of solutions are obtained from well known soliton equations by embedding SU(1,1) in ${Diff}(S^1)$.
description: Final version, to appear in Physics Letters A
Tutoring as a social practice : Taiwanese high school students in Vancouver
Creators: name: Wu, Angela Mei-Chen.
Publisher: name: University of British Columbia
Year: 2009

description: Tutoring is a rapidly increasing but under-researched component of the education of immigrant students. This study examines one-on-one tutoring of Taiwanese high school immigrant students in Vancouver. Viewing tutoring as a social practice rather than an instructional tool for teaching academic content, this exploratory study attempts to understand how participants construct tutoring in the British Columbian educational context. Factors such as the patterning of tutorials, the participants' perspectives, and the wider educational context have been considered in this study. This study recruited 12 tutor-tutee pairs, 12 parents, and 10 school teachers. Tutoring interactions were tape-recorded over a ten-month period. Combining aspects of discourse analysis and qualitative research, this study used discourse analysis to study tutoring interactions and qualitative interviews to explore the participants' beliefs about tutoring and schooling. This study explored the interaction patterns of tutoring, examined the participants' assumptions and expectations, and investigated the relationship between the tutoring (informal learning) and the schooling (formal learning) process of immigrant students. The varied patterns of tutorials suggested that tutoring went beyond teaching academic content and served multiple functions for the immigrant families. The patterns focused on addressing the needs of parents and students to interact with their schools, and providing emotional and cultural support. In addition, there seemed to be conflicting voices among the participants regarding the tutorial practices. For example, participants expressed strong and opposing views about the goals of tutoring and the quantity of homework, academic content instruction and grammar instruction in tutoring and in schools. These different voices seemed to cause tensions which were explored and negotiated in tutoring interactions. Lastly, the relation between tutoring and its wider educational context was both cooperative and conflictual. For example, while tutoring offered students homework assistance, this assistance caused the school teachers to be concerned with tutor over-helping. Thus, there is a complex and interactive relationship between tutoring and the educational system. To conclude, studying tutoring as a social practice acknowledges the varied tutorial patterns, the conflicts, the dynamics, and the complexity of tutoring interactions.
FOREIGN EXCHANGE RATE POLICY IMPLICATIONS ON COMPETITIVENESS IN AGRICULTURE
Creators: name: Farkas-Fekete, Maria
name: Sagi, Judit
name: Farkas-Fekete, Maria
name: Sagi, Judit
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agricultural Finance
subject: Political Economy
subject: monetary policy
subject: foreign exchange rate
subject: parity - monetaáris politika
subject: árfolyam
subject: paritás

description: By this study we follow the discussion initiated by prof. Magda in his article “Exchange rate policy and the agriculture”, also reflecting to Lakner-Podrudzsik “Does the depreciation of the forint mean a medicine or a placebo?” We argue that the real effective exchange rate – in case of small and open economies, especially in the medium term – basically determines the competitiveness of the economy as a whole, and the agriculture, as a part. In this paper we analyse the effects of the forint exchange rate divergence from the equilibrium exchange rate and its volatility, in relation to the specifications of the agricultural sector with possibilities to accommodate. In this sense we correspond to prof. Csáki, saying that recent appreciation of the forint has clarified the insufficient competitiveness and weak effectiveness of the Hungarian agriculture. XXXXXXXXXXXXXXXXXXXXXXXXXXXXX Tanulmányunk hozzászólás Magda Sándor: „Árfolyampolitika és az agrár-gazdaság” cikkéhez, egyúttal reflektálva Lakner Zoltán dr. és Podruzsik Szilárd: „Gyógyír vagy placebó a forint leértékelése” című cikkére. Állításunk, hogy a reálárfolyam – kis, nyitott és felzárkózó nemzetgazdaság esetében – lényegesen befolyásolja a reálgazdaság, ezen belül az agrárszektor versenyképességét, elsősorban középtávon. Elemzésük során a forintnak az egyensúlyi devizaárfolyamtól való eltérésének, valamint a forintárfolyam válto-zékonyságának hatását vizsgáltuk, tekintettel az agrárágazat sajátosságaira és alkalmazkodási lehetőségeire. Ebben a vonatkozásban cikkünk tehát kapcsoló-dik Csáki Csaba dr. hozzászólásában leírtakhoz, amely szerint a forint közel-múltbeli felértékelődése egyértelművé tette a magyar mezőgazdaság elégtelen versenyképességét és gyenge hatékonyságát.
Anomalous states of positronium
Creators: name: Patterson, Chris W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The energies and wave functions of the two-body Dirac equation for positronium are compared with those of the Pauli approximation and the Bethe-Salpeter equation. The unusual behavior of the ground-state wave function of the Dirac equation is explained in terms of anomalous bound-state solutions.
description: 42 pages, 5 figures
Renormalization scheme for a multi-qubit-network
Creators: name: Olaya-Castro, Alexandra
name: Lee, Chiu Fan
name: Johnson, Neil F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a renormalization scheme which simplifies the dynamics of an important class of interacting multi-qubit systems. We show that a wide class of M+1 qubit systems can be reduced to an equivalent n+1 qubit system with n equal to, or greater than, 2, for any M. Our renormalization scheme faithfully reproduces the overall dynamics of the original system including the entanglement properties. In addition to its direct application to atom-cavity and nanostructure systems, the formalism offers insight into a variety of situations ranging from decoherence due to a spin-bath with its own internal entanglement, through to energy transfer processes in organic systems such as biological photosynthetic units.
description: 4 pages, 4 figures
title: Fragile gods: ceramic figurines in Roman Britain
Creators: name: Fittock, Matthew G.
Publisher: name: University of Reading
Year: 2023

description: As small portable forms of statuary, pipeclay objects provide a valuable insight into the religious beliefs and practices of the culturally mixed populations of the Roman provinces. This thesis provides a complete catalogue of the nearly 1000 published and unpublished pipeclay objects found in Britain, including figurines, busts, shrines, animal vessels and masks. This research is the first study of this material conducted since the late 1970s. Pipeclay objects were made in Gaul and the Rhine-Moselle region but not in Britain. Attention thus focuses on where and how the British finds were made by analysing their styles, types, fabrics and any makers’ marks. This reveals how the pipeclay market in Britain was supplied and how these objects were traded, and suggests that cultural rather than production and trade factors were more influential on pipeclay consumption in Britain. A typological, chronological and distributional analysis of this material is conducted to highlight pipeclay consumption in Britannia. As in many other provinces, deities are the most common depiction and Venus figurines the most common type. Comparison with Continental collections highlights distinctive regional consumption patterns, with Britain having several rare and exotic types, especially in London. The social distribution and contexts of the British finds shows that pipeclay objects were mainly used by civilians - probably in domestic shrines and occasionally in temples and in the graves of often sick children. Rare types (both in terms of origin and fabric) probably belonged to higher status foreigners. This thesis identifies previously unidentified subtle differences between the use of pipeclay and metal figurines. While ostensibly the same function, significant differences in style and iconography show ceramic figurines overwhelmingly depicting goddesses while metal figurines tend to depict male deities. Similar numbers of each mean that both are rare in Britain, but subtle differences in their social distribution suggests different groups used ‘higher-status’ metal and ‘lower-status’ ceramic figurines in the province. Fragmentation experiments suggest that deliberately breaking figurine heads was an important ritual practice.
Marginalized youth and contemporary political engagement in the digital age
Creators: name: Kaskazi, Amana
Publisher: name: No Publisher Supplied
Year: 2021

description: This dissertation examines the participatory political practices of marginalized youth. It focuses on how youth with marginalized identities in New York City leverage the Internet and social media to engage in politics and navigate through the political sphere. Although there is emerging literature on information and communication technology and its impact on youth political engagement, research on the political practices and experiences of minority youth remains sparse. To address this gap, this mixed-methods study investigated how contemporary political engagement flows between online and offline interactions for marginalized teens. I developed a conceptual framework that analyzes three spheres of participation - everyday, societally triggered, and networked engagement – which marginalized youth navigate in their efforts to engage in politics. I argue that the everyday, societally triggered, and networked spheres of political engagement provide insight into contemporary, participatory practices and reveal the unique opportunities and challenges that marginalized youth encounter in the political realm.Specifically, this research investigates urban, minority teens, because they have first-hand experiences with inequality and injustice (e.g., less access to community resources and disproportionate interactions with the police and justice system) that may complicate their perceptions of politics and place additional boundaries to participation. Therefore, it is especially important to understand their political engagement in the context of their developing intersectional identities. To understand how contemporary political engagement unfolds for marginalized youth, this research used traditional, and digital, ethnographic methods, as well as interviews and surveys. An analysis of these three spheres illuminates the characteristics and effects of digital media on political engagement. The findings reveal that political engagement is interspersed between everyday, networked, and societally triggered contexts, such as school shootings. It is supported by the affordances of information and communication technology. This study contributes knowledge about the changing role of digital media on political communication and social movements, specifically how digital media amplify marginalized voices and stimulate civic action.
Do retail coffee prices increase faster than they fall? Asymmetric price transmission in France, Germany and the United States
Creators: name: Gomez, Miguel I.
name: Koerner, Julia
name: Gomez, Miguel I.
name: Koerner, Julia
Publisher: name: Unknown
Year: 2009
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: coffee
subject: markets

description: This investigation examines price transmission asymmetries (PTA) between international and retail coffee prices in the US, France and Germany. Differences in price transmission mechanisms provide evidence for disparities in market structure and market performance across countries. Although all processors of roasted coffee purchase green coffee at the same price in the international markets, one finds significant differences in retail prices among these countries. The study develops an Error Correction (EC) representation model to assess PTA of non-stationary models. Finally, it claims that identifying differences in price transmission asymmetry is an approach to compare market structure across countries.
title: Самостоятельные занятия физической культурой
Creators: name: ELS IPR BOOKS
Publisher: name: Профобразование, Ай Пи Ар Медиа
Year: 2025

description: Учебное пособие посвящено вопросам методики самостоятельных занятий физическими упражнениями и спортом, самоконтроля за уровнем физического развития и функционального состояния физиологических функций организма. Изложены понятия основных физических качеств человека, приведены термины и формулы для расчета необходимых индексов. Подготовлено с учетом требований Федерального государственного образовательного стандарта среднего профессионального образования. Предназначено для студентов всех специальностей и профессий, изучающих дисциплину «Физическая культура».
Preliminary analysis of photometric variations of central star of planetary nebula Sh 2-71
Creators: name: Mikulasek, Zdenek
name: Kohoutek, Lubos
name: Zejda, Miloslav
name: Pejcha, Ondrej
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We confirmed the presence of regular UBVRIc light variations of the object in the centre of planetary nebula Sh 2-71, the improved period of them being P =(68.132+/-0.005) days. The shapes and amplitudes of light curves in particular colours are briefly discussed.
description: 4 pages, 3 figures, Proceedings of the conference: Zdenek Kopal's Binary Stars Legacy, March 31 - April 3, 2004, Litomysl, Czech Republic, Eds: Horst Drechsel, Miloslav Zejda
Additional file 1 of Improving the health of workers with a low socioeconomic position: Intervention Mapping as a useful method for adaptation of the Participatory Approach
Creators: name: Schaap, R.
name: F. G. Schaafsma
name: A. R. Bosma
name: M. A. Huysmans
name: C. R. L. Boot
name: J. R. Anema
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: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Interview guides for the interviews and focus groups with workers with a low SEP, OHPs and employers.
Observational constraints on generalized Chaplygin gas model
Creators: name: Gong, Yungui
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The generalized Chaplygin gas model with parameter space $α>-1$ is studied in this paper. Some reasonable physical constraints are added to justify the use of the larger parameter space. The Type Ia supernova data and age data of some clusters are then used to fit the model. We find that the parameters have bimodal distributions. For the generalized Chaplygin gas model, we also find that less free parameters fit the data better. The best fit model is the spatially flat model with baryons. The best fit parameters are: $Ω_{m0}=0.044$, $w_{c0}=-0.881$ and $α=1.57$. The transition redshift is $z_T=0.395$.
description: 5 pages, 3 figures, use revtex
Middlemen, Non-Profits, and Poverty
Creators: name: Chau, Nancy H.
name: Goto, Hideaki
name: Kanbur, Ravi
name: Chau, Nancy H.
name: Goto, Hideaki
name: Kanbur, Ravi
Publisher: name: Unknown
Year: 2009
Subjects: subject: Food Security and Poverty
subject: International Development
subject: Productivity Analysis
subject: Middlemen
subject: Non-profits
subject: Poverty
subject: Market Access

description: In many markets in developing countries, especially in remote areas, middlemen are thought to earn excessive profits. Non-profits come in to counter what is seen as middlemen's market power, and rich country consumers pay a "fair-trade" premium for products marketed by such non-profits. This paper provides answers to the following five questions. How exactly do middlemen and non-profits divide up the market? How do the price mark up and price pass-through differ between middleman and non-profits? What is the impact of non-profits entry on the wellbeing of the poor? Should the government subsidize the entry of non-profits, or the entry of middlemen? Should wealthy consumers in the North pay a premium for fair trade products, or should they support fair trade non-profits directly?
A message-passing approach to epidemic tracing and mitigation with apps
Creators: name: Bianconi, Ginestra
name: Sun, Hanlin
name: Rapisardi, Giacomo
name: Arenas, Alex
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: With the hit of new pandemic threats, scientific frameworks are needed to understand the unfolding of the epidemic. The use of mobile apps that are able to trace contacts is of utmost importance in order to control new infected cases and contain further propagation. Here we present a theoretical approach using both percolation and message--passing techniques, to the role of contact tracing, in mitigating an epidemic wave. We show how the increase of the app adoption level raises the value of the epidemic threshold, which is eventually maximized when high-degree nodes are preferentially targeted. Analytical results are compared with extensive Monte Carlo simulations showing good agreement for both homogeneous and heterogeneous networks. These results are important to quantify the level of adoption needed for contact-tracing apps to be effective in mitigating an epidemic.
description: (5 pages,4 figures +SM)
Understanding the Entrepreneur: An Index of Entrepreneurial Success
Creators: name: Fried, Harold O.
name: Tauer, Loren W.
name: Fried, Harold O.
name: Tauer, Loren W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Financial Economics
subject: Productivity Analysis
subject: entrepreneur
subject: Kauffman Survey

description: A measure of entrepreneur success is important to identify current and future successful ventures, to further our understanding of the entrepreneurial process and to guide public policies to improve the success rate of start-ups. In this paper we propose an index of entrepreneur success that accommodates multiple inputs and outputs, that is predicated on inputs and that mitigates the impact of outliers. We relate the index to characteristics of the entrepreneur and the venture: age, experience, gender, race, competitive advantage, education, and birthplace. The data are from the Kauffman Firm Survey. The index is calculated for 2,863 firms in 2006.
Additional file 1 of Appraising patient preference methods for decision-making in the medical product lifecycle: an empirical comparison
Creators: name: Whichello, Chiara
name: Levitan, Bennett
name: Juhaeri Juhaeri
name: Patadia, Vaishali
name: DiSantostefano, Rachael
name: Pinto, Cathy Anne
name: Bekker-Grob, Esther W. De
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Additional file 1. Appendix I: Participant demographics and stakeholder affiliation.
CO and HCN isotopologue ratios in the outflows of AGB stars
Creators: name: Saberi, M.
name: Olofsson, H.
name: Vlemmings, W. H. T.
name: De Beck, E.
name: Khouri, T.
name: Ramstedt, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Isotopologue line intensity ratios of circumstellar molecules have been widely used to trace the photospheric elemental isotopic ratios of evolved stars. However, depending on the molecular species and the physical conditions of the environment, the circumstellar isotopologue ratio may deviate considerably from the stellar atmospheric value. In this paper, we aim to examine how the CO and HCN abundance ratios vary radially due to chemical reactions in the outflows of AGB stars and the effect of excitation and optical depth on the resulting line intensity ratios. We find that the circumstellar 12CO/13CO can deviate from its atmospheric value by up to 25-94% and 6-60% for C- and O-type CSEs, respectively. We show that variations of the intensity of the ISRF and the gas kinetic temperature can significantly influence the CO isotopologue ratio in the outer CSEs. On the contrary, the H12CN/H13CN ratio is stable for all tested mass-loss rates. The RT modeling shows that the integrated line intensity ratio of CO of different rotational transitions varies significantly for stars with intermediate mass-loss rates due to combined chemical and excitation effects. In contrast, the excitation conditions for the both HCN isotopologues are the same. We demonstrate the importance of using the isotopologue abundance profiles from chemical models as inputs to RT models in the interpretation of isotopologue observations. Previous studies of CO isotopologue ratios are based on multi-transition data for individual sources and it is difficult to estimate the errors in the reported values due to assumptions that are not entirely correct according to this study. If anything, previous studies may have overestimated the circumstellar 12CO/13CO abundance ratio. The use of the HCN as a tracer of C isotope ratios is affected by fewer complicating problems, provided one accounts corrections for high optical depths.
description: 14 pages, 11 figures
Anisotropic cosmological models with perfect fluid and dark energy
Creators: name: Saha, Bijan
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a self-consistent system of Bianchi type-I (BI) gravitational field and a binary mixture of perfect fluid and dark energy. The perfect fluid is taken to be the one obeying the usual equation of state, i.e., $p = ζ\ve$, with $ζ\in [0, 1]$ whereas, the dark energy density is considered to be either the quintessence or the Chaplygin gas. Exact solutions to the corresponding Einstein equations are obtained.
description: RevTex, 8 pages, 6 Figures
Additional file 1 of Relatives of deceased patients with metastatic lung cancer’s views on the achievement of treatment goals and the choice to start treatment: a structured telephone interview study
Creators: name: Mieras, Adinda
name: Onwuteaka-Philipsen, Bregje D.
name: Becker-Commissaris, Annemarie
name: Bos, Jose C. M.
name: H. Roeline W. Pasman
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 1. Appendix. Questionnaire for relatives.