cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Zastosowanie modelu grawitacyjnego do analizy międzynarodowego handlu miodem pszczelim
The Application of a Gravitational Model for Analyzing of International Trade in Bee Honey
Creators: name: Popovych, Andriy
name: Popovych, Andriy
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: Research Methods/ Statistical Methods
subject: bee honey
subject: international trade
subject: gravitational model
subject: miód pszczeli
subject: międzynarodowy handel
subject: model grawitacyjny

description: The aim of the article is to analyze the characteristics of functioning and to identify trends in the development of the global honey market. To analyze the factors affecting global trade in honey, the gravity model was used, namely its variation for a single product. Statistics on international trade from databases of leading international organizations were used to quantify this model. As a result of econometric analysis of panel data, the determinants of global trade in honey were identified and the use of the gravity model was justified in assessing this market. / Synopsis. Celem artykułu jest określenie cech funkcjonowania i identyfikacja trendów w rozwoju światowego rynku miodu. Aby zidentyfikować czynniki wpływające na światowy handel miodem, zastosowano model grawitacyjny, a mianowicie jego odmianę dla pojedynczego produktu. Dane statystyczne dotyczące handlu międzynarodowego pozyskano z baz światowych organizacji i użyto do ilościowego określenia tego modelu. W wyniku analizy ekonometrycznej danych panelowych zidentyfikowano determinanty światowego handlu miodem i potwierdziła zasadność zastosowania modelu grawitacyjnego do oceny tego rynku.
description: DOI: 10.22630/PRS.2018.18.4.128
Hunger Solution: One-Dimensional and Multi-Dimensional Food Security Programs
Creators: name: Reuveni, Saada
name: Reuveni, Saada
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Relations/Trade
subject: categorization
subject: classification
subject: one-dimension
subject: multi-dimension
subject: food security

description: Addressing hunger requires many different programs to tackle this issue. These programs need to be organized in an effective way, and so far, no evidence exists of attempts made to categorize hunger solution programs. This study takes the first step in suggesting a new approach to hunger program categorization. The two categories suggested are one-dimensional hunger programs and multi-dimensional hunger programs. The first category emphasizes a solution focused on one channel of activity to address the hunger problem. The second category emphasizes that hunger is a complex, multi-dimensional problem that requires a multi-pronged solution, working simultaneously through several channels to address hunger. This study tests six food security programs, discusses each profile’s working plans, and determines which category each program applies to. Categorization makes the study of hunger programs much easier and helps to identify similarity between proposes solutions. It has a practical side too. For example, it could serve as a basis for developing other new ideas for this issue or help to compare and determine effective programs or solutions. The two categories offered in this study for food security programs could also be easily applied to other hunger programs.
description: DOI: 10.22630/PRS.2018.18.4.129
Relativistic strange stars in Tolman-Kuchowicz spacetime
Creators: name: Biswas, Suparna
name: Shee, Dibyendu
name: Ray, Saibal
name: Rahaman, F.
name: Guha, B. K.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article we propose a relativistic model of a static spherically symmetric anisotropic strange star with the help of Tolman-Kuchowicz (TK) metric potentials [Tolman, Phys. Rev. {\bf55}, 364 (1939) and Kuchowicz, Acta Phys. Pol. {\bf33}, 541 (1968)]. The form of the potentials are $λ(r)=\ln(1+ar^2+br^4)$ and $ν(r)=Br^2+2\ln C$ where $a$, $b$, $B$ and $C$ are constants which we have to evaluate using boundary conditions. We also consider the simplest form of the phenomenological MIT bag equation of state (EOS) to represent the strange quark matter (SQM) distribution inside the stellar system. Here, the radial pressure $p_r$ relates with the density profile $ρ$ as follows, $p_r(r)=\frac{1}{3}[ρ(r)-4B_g]$, where $B_g$ is the Bag constant. To check the physical acceptability and stability of the stellar system based on the obtained solutions, we have performed various physical tests. It is shown that the model satisfies all the stability criteria, including nonsingular nature of the density and pressure, implies stable nature. Here, the Bag constant for different strange star candidates are found to be $(68-70)$~MeV/{fm}$^3$ which satisfies all the acceptability criteria and remains in the experimental range.
description: 32 pages, 9 figures, 2 tables
Hylaeus communis Nylander 1852
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Colletidae
Hylaeus
Hylaeus communis

description: Hylaeus communis Nylander, 1852
Conservation status
LC
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Integracja przestrzenna rynków hurtowych – zastosowanie dla rynku fasoli szparagowej
Spatial Integration of Wholesale Markets – Application for the Green Bean Market
Creators: name: Sobczak, Wioleta
name: Zbyrowski, Rafał
name: Sobczak, Wioleta
name: Zbyrowski, Rafał
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Research Methods/ Statistical Methods
subject: price transmission
subject: spatial integration
subject: VAR model
subject: Granger causality
subject: impulse response function
subject: transmisja cen
subject: integracja przestrzenna
subject: model VAR
subject: przyczynowość w sensie Grangera
subject: funkcja odpowiedzi na impuls

description: The aim of the study was to assess the level of spatial integration of wholesale fruit and vegetable markets in Poland based on the example of green bean, with respect to the results of research on a global scale. The paper discusses the problem of the price mechanism and transmission between the wholesale markets. The daily price quotations of the analyzed species on five wholesale markets in Poland were used for the study. Econometric methods, that is selected models of dynamic econometrics, were used to develop the data. / Synopsis. Celem opracowania była ocena poziomu integracji przestrzennej rynków hurtowych owoców i warzyw na przykładzie fasoli szparagowej. W pracy podjęto problem mechanizmu powiązań cenowych i transmisji cen pomiędzy rynkami hurtowymi. Do opracowania wykorzystano dzienne notowania cen analizowanego gatunku na pięciu rynkach hurtowych w Polsce. Do opracowania danych posłużyły metody ekonometryczne tj. wybrane modele ekonometrii dynamicznej. Wskazano, że znaczenie poszczególnych rynków hurtowych w kreowaniu cen zależy m.in. od wielkości rynku oraz jego lokalizacji.
description: DOI: 10.22630/PRS.2018.18.4.131
Neutron rich matter in the laboratory and in the heavens after GW170817
Creators: name: Horowitz, C. J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The historic observations of the neutron star merger GW170817 advanced our understanding of r-process nucleosynthesis and the equation of state (EOS) of neutron rich matter. Simple neutrino physics suggests that supernovae are not the site of the main r-process. Instead, the very red color of the kilonova associated with GW170817 shows that neutron star (NS) mergers are an important r-process site. We now need to measure the masses and beta decay half-lives of very neutron rich heavy nuclei so that we can more accurately predict the abundances of heavy elements that are produced. This can be done with new radioactive beam accelerators such as the Facility for Rare Isotope Beams (FRIB). GW170817 provided information on the deformability of NS and the equation of state of dense matter. The PREX II experiment will measure the neutron skin of ${}^{208}$Pb and help constrain the low density EOS. As the sensitivity of gravitational wave detectors improve, we expect to observe many more events. We look forward to exciting advances and surprises!
description: 12 pages, 4 figures
Electron and Hole Spin Splitting and Photogalvanic Effect in Quantum Wells
Creators: name: Golub, L. E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A theory of the circular photogalvanic effect caused by spin splitting in quantum wells is developed. Direct interband transitions between the hole and electron size-quantized subbands are considered. It is shown that the photocurrent value and direction depend strongly on the form of the spin-orbit interaction. The currents induced by structure-, bulk-, and interface-inversion asymmetry are investigated. The photocurrent excitation spectra caused by spin splittings in both conduction and valence bands are calculated.
description: 7 pages, 3 figures
Carbon Emissions Assessment for UBC Food Services
Creators: name: Chang, Enwei
name: Shao, Feier
name: Qian, Annie
name: Zhao, Sarah
name: Zhang, Harbor
Publisher: name: The University of British Columbia
Year: 2023

description: In response to the climate emergency, UBC has developed the UBC Climate Action Plan 2030 (CAP 2030) with a target to reduce greenhouse gas emissions from food systems by 50% by 2030. Our research aims to identify the top 3-5 food product categories with the highest carbon emissions and provide recommendations to reduce carbon emissions. We begin by cleaning and visualizing data from all UBCFS food purchases in 2022. Our results show that “Grocery”, “Dairy”, and “Beverage” product classes are the top three emitters, while “Meat” contributes a relatively small portion of carbon emission. We then develop several regression models, and our results demonstrate that food products in the “Meat”, “Dairy” and “Processed” product classes are the top contributors to carbon emissions. Weight of food purchased is an important factor determining the carbon intensity, which causes the difference between our data visualization and regression analysis results. Finally, we recommend purchasing alternative food products with a lower carbon footprint and we suggest several ways forward for future, more detailed analysis. Our findings offer a starting point for a more nuanced approach to reducing the carbon footprint of food systems, which is vital to achieving UBC’s goal of net-zero operational emissions by 2035. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
The Lagrange-mesh R-matrix method for inhomogenous equations
Creators: name: Lei, Jin
name: Descouvemont, Pierre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Lagrange-mesh $R$-matrix method is generalized to inhomogeneous equations. This method is numerically stable and efficient. It can be directly used for transfer reactions with the formalism discussed by Ascuitto and Glendenning [Phys. Rev. 181,1396 (1969)] and for inclusive breakup reactions modeled by Ichimura, Austern, and Vincent [Phys. Rev. C 32, 431 (1985)]. We first present a simple example to assess the method. Then the application to the $^{93}$Nb($d$,$pX$) non-elastic breakup is discussed.
description: 7 pages, 6 figures
Tendencje na rynku masła i serów na świecie i w Polsce w latach 2001-2017
Tendencies in the Global Butter and Cheese Markets and in Poland in the years 2001-2017
Creators: name: Stańko, Stanisław
name: Mikuła, Aneta
name: Stańko, Stanisław
name: Mikuła, Aneta
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: Livestock Production/Industries
subject: Production Economics
subject: butter
subject: cheese
subject: production
subject: domestic consumption
subject: market surpluses
subject: masło
subject: ser
subject: produkcja
subject: zużycie krajowe
subject: nadwyżki rynkowe

description: Changes in production and trends in shortages / market surpluses of butter and cheese in the world and in Poland in 2001-2017 were presented. Market surplus of butter increased in New Zealand, EU and Belarus, and decreased in Australia and Ukraine. Shortages grew in China, Mexico, Iran and Turkey, and decreased in Russia and Canada. Relatively balanced production and consumption occurred in India, Pakistan, the USA and Brazil. On the cheese market, surplus grew in: EU, USA, New Zealand, Argentina and Belarus, and decreased in Australia and Ukraine. The shortages grew in: Russia, Brazil, Mexico. In Poland, there were surpluses in butter and cheese production, which resulted in growing exports, directed mainly to EU countries. Prices of butter and cheese in EU countries and on the world market were characterized by convergence. At the beginning of the analyzed period, butter prices in the EU were 134% higher than on the world market, and cheese prices were higher by 92.6%, and in 2017 these differences were respectively 6% and 0.6%. / Synopsis. Przedstawiono zmiany w produkcji oraz tendencje w niedoborach/nadwyżkach rynkowych masła i sera na świecie w latach 2001-2017 u największych producentów oraz w Polsce. Nadwyżki rynkowe masła zwiększały się w: Nowej Zelandii, UE i Białorusi, a zmniejszały w Australii i na Ukrainie. Niedobory rosły w Chinach, Meksyku, Iranie i Turcji, a zmniejszały się w Rosji i Kanadzie. Względnie zrównoważona produkcja i spożycie występowały w Indiach, Pakistanie, USA i Brazylii. Na rynku sera nadwyżki rosły w: UE, USA, Nowej Zelandii, Argentynie i Białorusi, a zmniejszały się w Australii i na Ukrainie. Niedobory rosły w: Rosji, Brazylii, Meksyku. W Polsce rosły nadwyżki produkcji masła i sera, co skutkowało rosnącym eksportem, kierowanym głównie do krajów UE. Ceny masła i sera w krajach UE i na rynku światowym charakteryzowały się konwergencją. Na początku badanego okresu ceny masła w UE były o 134% wyższe niż na rynku światowym, a sera o 92,6%, a w 2017 r. różnice te wynosiły odpowiednio: 6% i 0,6%.
description: DOI: 10.22630/PRS.2018.18.4.132
The cosmic evolution of quasar host galaxies
Creators: name: Falomo, R.
name: Kotilainen, J. K.
name: Pagani, C.
name: Scarpa, R.
name: Treves, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present near-infrared imaging of the host galaxies of 17 quasars in the redshift range 1 < z < 2, carried out at the ESO VLT UT1 8m telescope under excellent seeing conditions (~0.4 arcsec). The sample includes radio-loud (RLQ) and radio-quiet (RQQ) quasars with similar distribution of redshift and optical luminosity. For all the observed objects but one we have derived the global properties of the surrounding nebulosity. The host galaxies of both types of quasars follow the expected trend in luminosity of massive ellipticals undergoing simple passive evolution, but there is a systematic difference by a factor ~2 in the host luminosity between RLQs and RQQs (M_K(RLQ) = -27.55 +- 0.12 and M_K(RQQ) = -26.83 +- 0.25). Comparison with quasar hosts at similar and lower redshift indicates that the difference in the host luminosity between RLQs and RQQs remains the same from z = 2 to the present epoch. No significant correlation is found between the nuclear and the host luminosities. Assuming that the host luminosity is proportional to the black hole mass, as observed in nearby massive spheroids, these quasars emit at very different levels (spread \~1.5dex) with respect to their Eddington luminosity and with the same distribution for RLQs and RQQs. Apart from a factor of ~2 difference in luminosity, the hosts of RLQs and RQQs appear to follow the same cosmic evolution as massive inactive spheroids. Our results support a view where nuclear activity can occur in all luminous ellipticals without producing a significant change in their global properties and evolution. Quasar hosts appear to be already well formed at z ~2, in disagreement with models for the joint formation and evolution of galaxies and active nuclei based on the hierarchical structure formation scenario.
description: Astrophysical Journal, accepted; 34 pages
Lasioglossum albipes
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Lasioglossum
Lasioglossum albipes

description: Lasioglossum albipes (Fabricius, 1781)
Conservation status
NT
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Treatment pattern and medical cost of systemic lupus erythematosus patients in Japan: A retrospective claims database study
Creators: name: Celine Miyazaki
name: Rosarin Sruamsiri
name: Jӧrg Mahlich
name: Wonjoo Jung
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Science Policy

description: Aim: To describe the characteristics and medication treatment patterns, healthcare resource utilization (HRU), and associated costs in Japanese patients with systemic lupus erythematosus (SLE). Methods: Claims data from the Japan Medical Data Center database were used to identify patients with SLE-related claims from 2010 to 2017. Algorithms were developed to retrospectively categorize patients by disease severity, treatment experience, and SLE-related manifestations such as lupus nephritis and central nervous system lupus. Descriptive and multivariate analyses were used to describe treatment pattern and estimate HRU and associated costs for the SLE cohort overall and by disease severity and complications. Results: Among 4,733 eligible patients, 2,072 (43.8%) were treatment naïve, 2,214 (46.8%) were previously treated for SLE, and 447 (9.4%) did not receive any treatment. Mean (SD) age of the total SLE cohort was 45.2 (13.1) years and mean (SD) follow-up duration was 1,137.3 (758.0) days. Based on disease severity, 1,383 (29.2%) patients had mild, 2,619 (55.3%) patients had moderate, and 731 (15.4%) patients had severe SLE. Patients on glucocorticoids (both oral and parenteral) received add-on medications the most (35.5%, p Limitations: The database only captured information on patients up to 75 years of age. Due to the nature of the database, biases regarding conditions that attribute to the spectrum of SLE severity, flare incidences, or individual physical status cannot be ruled out. Conclusion: This study describes the treatment patterns and economic burden experienced by Japanese patients with SLE. The results highlight an unmet need to derive better treatment strategies for patients with SLE to effectively address the disease burden in Japan.
Megachile versicolor Smith 1844
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Megachilidae
Megachile
Megachile versicolor

description: Megachile versicolor Smith, 1844
Conservation status
LC
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Spółdzielczość rolnicza we Francji i Niemczech – wybrane zagadnienia prawne i ekonomiczne
Agricultural Cooperatives in France and Germany – Selected Legal and Economic Issues
Creators: name: Suchoń, Aneta
name: Suchoń, Aneta
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Farm Management
subject: Industrial Organization
subject: International Relations/Trade
subject: agricultural cooperatives
subject: agriculture
subject: agricultural holding
subject: cooperatives in France and Germany
subject: spółdzielnie rolnicze
subject: rolnictwo
subject: gospodarstwo rolne
subject: spółdzielnie we Francji i Niemczech

description: France and Germany are examples of countries where agriculture is an important part of the economy, there is a large number of farms and the cooperative movement is very popular. In the European Union there are over 22 thousand agricultural cooperatives. The article presents statistical data and legal regulations concerning agricultural cooperatives in France and Germany, in particular, the French Code Rural and the German Genossenschaftsgesetz. In conclusion the author states that the Polish legislature, creating a new model of cooperative law, should unquestionably draw on the experience and some legal solutions implemented in Germany and France, and in particular introduce a broad definition of agricultural cooperatives, a simplified procedure of their formation and functioning, financial instruments, including tax, and rules on merging cooperatives with other cooperative entities or companies. / Synopsis. Francja i Niemcy są przykładami państw, w których rolnictwo jest istotnym działem gospodarki, występuje duża liczba gospodarstw rolnych, a ruch spółdzielczy jest bardzo popularny. W Unii Europejskiej funkcjonuje ponad 22 tys. spółdzielni rolniczych. W ramach rozważań zaprezentowano dane statystyczne i regulacje prawne dotyczące spółdzielni rolniczych we Francji i Niemczech, w szczególności francuski Code Rural oraz niemiecką ustawa Genossenschaftsgesetz. W podsumowaniu autorka stwierdziła, że polski prawodawca, tworząc nowy prawny model spółdzielczości, powinien bezsprzecznie skorzystać z doświadczeń i niektórych rozwiązań prawnych występujących w Niemczech i Francji, m.in. w zakresie wprowadzenia szerokiej definicji spółdzielni rolniczych, uproszczeń w zakresie zakładania i funkcjonowania tych podmiotów, instrumentów finansowych, w tym podatkowych, łączenia spółdzielni z innymi podmiotami spółdzielczymi czy spółkami kapitałowymi.
description: DOI: 10.22630/PRS.2018.18.4.133
Jet tomography
Creators: name: Vitev, Ivan
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: I summarize the recent advances in jet tomographic studies of cold and hot nuclear matter based on perturbative QCD calculations of medium-induced gluon bremsstrahlung. Quantitative applications to ultrarelativistic heavy ion reactions at RHIC indicate the creation of a deconfined state of QCD with initial energy density on the order of 100 times cold nuclear matter density.
description: Plenary talk given at the seventeenth international conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2004). 8 pages, 12 figures. Updated references, updated Table 2
Kierunki dostosowań przedsiębiorstw handlowych do wzorców zakupowych konsumentów
Directions of Adaptation of Commercial Enterprises to Consumer Purchasing Patterns
Creators: name: Szwacka-Mokrzycka, Joanna
name: Letkowski, Grzegorz
name: Szwacka-Mokrzycka, Joanna
name: Letkowski, Grzegorz
Publisher: name: Unknown
Year: 2018
Subjects: subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: retail trade
subject: trade structural changes
subject: consumer purchasing patterns
subject: handel detaliczny
subject: zmiany strukturalne w handlu
subject: wzorce zakupowe konsumentów

description: During the transformation of the Polish economy, the huge changes took place in the distribution system. In 1990 the integrator in the food chain was the food industry. In the second decade of the 21st century, the same function is fulfilled by retail trade. This situation is due to the growing position of transnational corporations in Poland. The main goal of the article is to present the scale and scope of changes in retail trade in Poland and to determine the direction of adaptation of commercial enterprises to consumer purchasing patterns. The starting point of consideration is to present the processes of sector concentrations in 2012-2016. Then, the trends of retail trade during the transformation of the Polish economy were analysed. The next part of the study presents adaptations of trade enterprises to the purchasing patterns of Polish consumers. / Synopsis. W okresie transformacji polskiej gospodarki, największe zmiany zaszły w systemie dystrybucji. Tak jak w latach 90. XX w. integratorem w łańcuchu żywnościowym był przemysł spożywczy, tak w drugiej dekadzie XXI w. funkcję tę pełni handel detaliczny. Wynika to z faktu rosnącej pozycji korporacji transnarodowych w Polsce. Celem przewodnim artykułu jest przedstawienie skali i zakresu zmian w handlu detalicznym w Polsce i określenie kierunku dostosowań przedsiębiorstw handlowych do wzorców zakupowych konsumentów. Punktem wyjścia rozważań jest przedstawienie procesów koncentracji sektora w latach 2012-2016. Następnie poddano analizie kierunki zmian w handlu detalicznym w okresie transformacji gospodarki polskiej. W kolejnej części opracowania przedstawiono dostosowania przedsiębiorstw handlowych do wzorców zakupowych polskich konsumentów.
description: DOI: 10.22630/PRS.2018.18.4.134
Ultra-narrow spectral response of a hybrid plasmonic-grating sensor
Creators: name: Elshorbagy, Mahmoud H.
name: Cuadrado, Alexander
name: Garcia-Camara, Braulio
name: Vergaz, Ricardo
name: Gomez-Pedrero, Jose Antonio
name: Alda, Javier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We configure and analyze a nanostructured device that hybridizes grating modes and surface plasmon resonances. The model uses an effective index of refraction that considers the volume fraction of the involved materials, and the propagation depth of the plasmon through the structure. Our geometry is an extruded low-order diffraction grating made of dielectric nano-triangles. Surface plasmon resonances are excited at a metal/dielectric interface, which is separated from the analyte by a high-index dielectric layer. The optical performance of the refractometric sensor is highly competitive in sensitivity and figure of merit (FOM) because of the the ultra-narrow spectral response (below 0.1 nm). Moreover, it is operative within a wide range of the index of refraction (from 1.3 till 1.56), and also works under normal incidence conditions.
The Gromov invariant and the Donaldson-Smith standard surface count
Creators: name: Usher, Michael
Publisher: name: arXiv
Year: 2003
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D45, 57R17

description: Simon Donaldson and Ivan Smith recently studied symplectic surfaces in symplectic 4-manifolds X by introducing an invariant DS associated to any Lefschetz fibration on blowups of X which counts holomorphic sections of a relative Hilbert scheme that is constructed from the fibration. Smith has shown that DS satisfies a duality relation identical to that satisfied by the Gromov invariant Gr introduced by Clifford Taubes, which led Smith to conjecture that DS=Gr provided that the fibration has high enough degree. This paper proves that conjecture. The crucial technical ingredient is an argument which allows us to work with curves C in the blown-up 4-manifold that are made holomorphic by an almost complex structure which is integrable near C and with respect to which the fibration is a pseudoholomorphic map.
description: Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol8/paper14.abs.html
Research Data Management: Simple Ways to Make your Research Life Easier
Creators: name: Morrell, Thomas E.
Publisher: name: Zenodo
Year: 2020
Subjects: Research Data Management
CaltechDATA

description: v1.8 Presentation on Research Data Management for the Fall 2021 Data Analysis in the Biological Sciences BE/Bi 103 course. v1.7 Presentation on Research Data Management for the Fall 2020 Data Analysis in the Biological Sciences BE/Bi 103 course. v1.6 Presentation on Research Data Management for the Fall 2019 Data Analysis in the Biological Sciences BE/Bi 103 course. v1.5 Presentation on Research Data Management for the June 2019 Introduction to Programming for the Biological Sciences Bootcamp. v1.4 Presentation on Research Data Management for the Fall 2018 Data Analysis in the Biological Sciences BE/Bi 103 course. v1.3 Presentation on Research Data Management for the Fall 2017 Data Analysis in the Biological Sciences BE/Bi 103 course. v1.2 Presentation on Research Data Management for the June 2017 Introduction to Programming for the Biological Sciences Bootcamp BE/Bi/NB 203.
Dynamika światowej produkcji mięsa drobiowego w latach 1965 2016
The Dynamics of World Production of Poultry Meat from 1965 2016
Creators: name: Utnik-Banaś, Katarzyna
name: Utnik-Banaś, Katarzyna
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: Livestock Production/Industries
subject: meat production
subject: poultry production
subject: Poland
subject: produkcja mięsa
subject: produkcja drobiarska

description: The production of poultry meat is characterized by high dynamics of growth. The world's largest producers of poultry meat include: USA, China and Brasil. The production of poultry meat in these three countries accounted for around 45% of world production in 2016. The other countries that counted in the world in poultry production were: Russia, India, Mexico, Japan and Poland. The largest increase in poultry production in 1965-2016 took place in Brazil and China. On the other hand, the share of the United States and the countries of the present European Union in percentage terms decreased. In Poland, the increase in poultry production in the analyzed period was over 25 times. Since 2014, Poland is the largest producer and exporter of poultry meat in the European Union. / Synopsis. Produkcja mięsa drobiowego odznacza się wysoką dynamiką wzrostu. Do największych światowych producentów mięsa drobiowego należą: Stany Zjednoczone, Chiny i Brazylia. Produkcja mięsa drobiowego w tych trzech krajach stanowiła ok. 45% produkcji światowej w 2016 roku. Pozostałymi krajami liczącymi się w świecie w produkcji drobiarskiej były: Rosja, Indie, Meksyk, Japonia i Polska. Największy wzrost produkcji drobiu w latach 1965-2016 miał miejsce w Brazylii oraz w Chinach. Natomiast udział Stanów Zjednoczonych oraz krajów obecnej Unii Europejskiej w ujęciu procentowym zmniejszał się. W Polsce wzrost produkcji drobiarskiej w analizowanym okresie był ponad 25-krotny. Od 2014 roku Polska jest największym producentem i eksporterem mięsa drobiowego w Unii Europejskiej.
description: DOI: 10.22630/PRS.2018.18.4.135
Nomada signata Jurine 1807
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Nomada
Nomada signata

description: Nomada signata Jurine, 1807
Conservation status
LC
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
ACRL Impactful Scholarship and Metrics Task Force background results and recommendations
Creators: name: Borchardt, Rachel
Publisher: name: figshare
Year: 2020
Subjects: subject: 80706 Librarianship
subject: FOS: Media and communications

description: Background research, findings and applications, and stakeholder recommendations from the ACRL Impactful Scholarship and Metrics Task Force, published March 2020.
Intermediate Inputs and International Trade: An Analysis of the Real and Monetary Aspects of an Oil Price Shock
Creators: name: Djajic, Slobodan
name: Djajic, Slobodan
Publisher: name: Unknown
Year: 1980
Subjects: Financial Economics
International Relations/Trade

description: This paper analyses the real and monetary effects of an increase in the price of a traded intermediate input. On the production side, the model differs from other work on the subject in that our economy produces the intermediate input and also traded and non-traded final goods. On the asset side, titles representing ownership of the specific factor which is used in the production of the intermediate input, are explicitly introduced into portfolios. The analysis mainly focuses on the effects of an increase in the price of the intermediate input on the distribution of income, relative prices, production levels, the balance of trade and the level of, as well as the rates of change in, nominal prices and the exchange rate.
Vacuum spacetimes with a spacelike, hypersurface-orthogonal Killing vector: reduced equations in a canonical frame
Creators: name: Bonanos, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Newman-Penrose equations for spacetimes having one spacelike Killing vector are reduced -- in a geometrically defined "canonical frame'' -- to a minimal set, and its differential structure is studied. Expressions for the frame vectors in an arbitrary coordinate basis are given, and coordinate-independent choices of the metric functions are suggested which make the components of the Ricci tensor in the direction of the Killing vector vanish.
description: 13 pages, no figures, LaTeX, to be published in Class. Quantum Gravity; v2: added/rephrased content, corrected typos, changed 1 reference
AD-EYE: A Co-simulation Platform for Early Verification of Functional Safety Concepts
Creators: name: Mohan, Naveen
name: Törngren, Martin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Automated Driving is revolutionizing many of the traditional ways of operation in the automotive industry. The impact on safety engineering of automotive functions is arguably one of the most important changes. There has been a need to re-think the impact of the partial or complete absence of the human driver (in terms of a supervisory entity) in not only newly developed functions but also in the qualification of the use of legacy functions in new contexts. The scope of the variety of scenarios that a vehicle may encounter even within a constrained Operational Design Domain, and the highly dynamic nature of Automated Driving, mean that new methods such as simulation can greatly aid the process of safety engineering. This paper discusses the need for early verification of the Functional Safety Concepts (FSCs), details the information typically available at this stage in the product lifecycle, and proposes a co-simulation platform named AD-EYE designed for exploiting the possibilities in an industrial context by evaluating design decisions and refining Functional Safety Requirements based on a reusable scenario database. Leveraging our prior experiences in developing FSCs for Automated Driving functions, and the preliminary implementation of co-simulation platform, we demonstrate the advantages and identify the limitations of using simulations for refinement and early FSC verification using examples of types of requirements that could benefit from our methodology.
description: 12 pages, single column in this preprint
Stability of global entanglement in thermal states of spin chains
Creators: name: Brennen, Gavin K.
name: Bullock, Stephen S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the entanglement properties of a one dimensional chain of spin qubits coupled via nearest neighbor interactions. The entanglement measure used is the n-concurrence, which is distinct from other measures on spin chains such as bipartite entanglement in that it can quantify "global" entanglement across the spin chain. Specifically, it computes the overlap of a quantum state with its time-reversed state. As such this measure is well suited to study ground states of spin chain Hamiltonians that are intrinsically time reversal symmetric. We study the robustness of n-concurrence of ground states when the interaction is subject to a time reversal antisymmetric magnetic field perturbation. The n-concurrence in the ground state of the isotropic XX model is computed and it is shown that there is a critical magnetic field strength at which the entanglement experiences a jump discontinuity from the maximum value to zero. The n-concurrence for thermal mixed states is derived and a threshold temperature is computed below which the system has non zero entanglement.
description: 13 pages, 3 figures. v.2 includes minor corrections and an added section treating the quantum XX model with open boundaries
The Impact of Framing of Upcycled Foods on Willingness to Purchase
Creators: name: Kaur, Kirin
name: Buckle, Phoebe Fulton
name: Aggarwal, Rishika
name: Kaur, Tanvi
name: Zheng, Yutong
Publisher: name: The University of British Columbia
Year: 2023

description: This study aimed to determine how framing upcycled foods as “economical” and “environmentally responsible” impacts the consumer’s willingness to buy those foods. The research question is: How does framing upcycled foods as “economical” and “environmentally responsible” impact the consumer’s willingness to buy those foods compared to those with no framing? We hypothesized that framing upcycled foods as environmentally responsible or economical will increase people’s willingness to buy upcycled food. We conducted a between-group research study by randomly assigning 231 participants who were either UBC or non-UBC students to the economical condition, the environmentally responsible condition or the control condition. An online survey measured participants' intentions to purchase the upcycled food items. Using one-way ANOVA, our study discovered no statistically significant differences across the three conditions of the participants’ intentions to purchase the upcycled food items, which doesn't support our hypothesis. However, the environmentally responsible framing had the highest purchase intent, which provides some insight into the recommendations. No significant correlations were discovered between purchase intent and concern for sustainability; between purchase intent and concern for grocery prices; and between environmentally responsible framing and purchase intent. Based on our result, we recommended UBC food services focusing on raising awareness of environmental responsibility and price consciousness. Overall, these actions will help UBC reach its sustainability goals. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
The Structure of Multi-Period Employment Contracts with Incomplete Insurance Markets
Creators: name: Arnott, Richard
name: Arnott, Richard
Publisher: name: Unknown
Year: 1980
Subjects: Financial Economics
Labor and Human Capital

description: This paper examines the structure of multi-period employment contracts in an economy with identical workers when only incomplete insurance is provided against job-related contingencies. The incompleteness of insurance markets stems from an asymmetry of information between the worker and the insurer. In this situation, the employment contract will provide implicit insurance by paying workers less than their marginal product during some periods and more during others. The paper explores how the characteristics of such contracts are altered by increases in uncertainty, worker risk aversion, hiring costs, and the amount of specific and general training provided. A sequel to this paper examines the efficiency properties of such contracts.
3D Turbulent Reconnection: Theory, Tests and Astrophysical Implications
Creators: name: Lazarian, Alex
name: Eyink, Gregory L.
name: Jafari, Amir
name: Kowal, Grzegorz
name: Li, Hui
name: Xu, Siyao
name: Vishniac, Ethan T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Magnetic reconnection, topological change in magnetic fields, is a fundamental process in magnetized plasmas. It is associated with energy release in regions of magnetic field annihilation, but this is only one facet of this process. Astrophysical flows normally have very large Reynolds numbers and are expected to be turbulent, in agreement with observations. In strong turbulence magnetic lines constantly reconnect everywhere at all scales, making magnetic reconnection an intrinsic part of turbulent cascade. We note that this is inconsistent with the usual practice of regarding magnetic lines as persistent dynamical elements. A number of theoretical, numerical, and observational studies, starting with Lazarian & Vishniac (1999), demonstrated that 3D turbulence makes magnetic reconnection fast and that these two processes are intrinsically connected. We discuss the dramatic violation of the textbook concept of magnetic flux-freezing in the presence of turbulence and demonstrate that in the presence of turbulence the plasma effects are subdominant to turbulence as far as the magnetic reconnection is concerned. This justifies an MHD-like treatment of magnetic reconnection at scales much larger than the relevant plasma scales. We discuss numerical and observational evidences supporting the turbulent reconnection model. In particular, we show that tearing reconnection is suppressed in 3D and, unlike the 2D case, the 3D reconnection induces turbulence that makes reconnection independent of resistivity. We show that turbulent reconnection dramatically affects the key astrophysical processes, e.g., star formation, turbulent dynamo, acceleration of cosmic rays. We provide criticism of the concept of "reconnection-mediated turbulence" and explain why turbulent reconnection is very different from enhanced turbulent resistivity and hyper-resistivity, and why the latter has fatal conceptual flaws.
description: 94 pages, 39 figures
Interest Rates and durability in the Linear Expenditure Family
Creators: name: Fisher, Gordon
name: McAleer, Michael
name: Whistler, Diana
name: Fisher, Gordon
name: McAleer, Michael
name: Whistler, Diana
Publisher: name: Unknown
Year: 1980
Subjects: Financial Economics

description: In this paper we demonstrate that the extended linear expenditure system with durables (DELES) satisfies the first-order conditions for local unidentifiability, and discuss alternative methods that might be used to achieve identifiability, as well as their implications. Estimates are then presented of the linear expenditure system (LES), the extended linear expenditure system (ELES) and DELES, under each of two alternative error specifications, using seasonally adjusted, quarterly Australian data from 1959(4) to 1976(2). The two main purposes of this exercise are: (i) to compare the effects of allowing for first-order autocorrelation in LES and ELES; and (ii) to gauge the contribution of DELES to the linear expenditure family by making corresponding comparisons with ELES. When we fix the decay rate for durables a priori, in an attempt to secure identifiability, the estimates of the remaining parameters are insensitive to the value chosen. This suggests a major difficulty in interpreting DELES and leads us to reconsider its limiting properties.
Opacity modelling of heavy-metal hot subdwarfs. Photoionization of Sr$^0$, Y$^{+}$ and Zr$^{2+}$
Creators: name: Fernández-Menchero, L.
name: Jeffery, C. S.
name: Ramsbottom, C. A.
name: Ballance, C. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Heavy-metal hot subdwarfs (sdB and sdO) represent a small group of stars with unusually high concentrations of trans-iron elements in their atmospheres, having abundances ~ 10000 times solar. One example is LS IV-14$^{\circ}$ 116, where a number of heavy-metal absorption lines of Sr II, Y III and Zr IV have been observed in the optical band 4000 - 5000 A. We use a fully relativistic Dirac atomic R-Matrix (DARC) to calculate photoionization cross sections of Sr$^{0}$, Y$^{+}$ and Zr$^{2+}$ from their ground state to the twentieth excited level. We use the cross sections and the oscillator strengths to simulate the spectrum of a hot subdwarf. We obtain complete sets of photoionization cross sections for the three ions under study. We use these data to calculate the opacity of the stellar atmospheres of hot subdwarf stars, and show that for overabundances observed in some heavy-metal subdwarves, photo-excitation from zirconium, in particular, does contribute some back warming in the model.
description: 8 pages, 6 figures, 6 tables