978 research outputs found

    Re-use of public sector information in cultural heritage institutions

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    In 2013 the European Union amended the Directive on Public Sector Information, establishing the principle that all available information produced and collected by public sector institutions must be made available for reuse under open terms and conditions. The amended Directive also brings publicly funded libraries, museums and archives into its scope. These new rules on reuse of heritage materials, treated as public sector information (PSI), attempt for the first time to define a general framework for sharing cultural heritage information all around Europe. In this paper we argue that if Member States are not careful, the implementation of the changes required by the new Directive could do more harm than good when it comes to access to digitized cultural heritage in Europe. These concerns center on how the directive interacts with copyright legislation. The paper recommends that in order to contribute to the opening up of cultural heritage resources, Member States should ensure that all qualifying documents that are not currently covered by third party intellectual property rights fall within the scope of the Directive. Member States should also implement the Directive in a way that does not encourage or require institutions to charge for the reuse of works that they make available for reuse. For documents that are still protected by intellectual property rights but where these rights are held by the cultural heritage institutions that have these works in their collections, Member States should encourage the use of Open Definition-compliant licenses

    Modelling flexible manufacturing systems through discrete event simulation

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    As customisation and product diversification are becoming standard, industry is looking for strategies to become more adaptable in responding to customer’s needs. Flexible manufacturing systems (FMS) provide a unique capability where there is a need to provide efficiency through production flexibility. Full potential of FMS development is difficult to achieve due to the variability of components within this complex manufacturing system. It has been recognised that there is a requirement for decision support tools to address different aspects of FMS development. Discrete event simulation (DES) is the most common tool used in manufacturing sector for solving complex problems. Through systematic literature review, the need for a conceptual framework for decision support in FMS using DES has been identified. Within this thesis, the conceptual framework (CF) for decision support for FMS using DES has been proposed. The CF is designed based on decision-making areas identified for FMS development in literature and through industry stakeholder feedback: set-up, flexibility and schedule configuration. The CF has been validated through four industrial simulation case studies developed as a part of implementation of a new FMS plant in automotive sector. The research focuses on: (1) a method for primary data collection for simulation validated through a case study of material handling robot behaviour in FMS; (2) an approach for evaluation of optimal production set-up for industrial FMS with DES; (3) a DES based approach for testing FMS flexibility levels; (4) an approach for testing scheduling in FMS with the use of DES. The study has supported the development of systematic approach for decision making in FMS development using DES. The approach provided tools for evidence based decision making in FMS

    THE STRUCTURE OF THE FIRST CO-ORDINATION SHELL OF Pb ATOMS IN LEAD-SILICATE GLASSES :A MOLECULAR DYNAMICS STUDY

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    The structure of lead-silicate glasses, although being investigated for over sixty years, remains still controversial. One of the open questions is the structure of the lead subsystem: what are the basic structural units like, and how are they interconnected. In the literature the appearance of [PbO4]n, or [PbO3]n chains is reported even in the glasses of the same stoichiometry. In order to elucidate the problem of contradicting experimental findings, extensive molecular dynamics (MD) simulations in the isobaric-isoenthalpic (NpH) ensemble of the structure of lead-silicate glasses have been performed in the whole range of glassformation. The atoms were assumed to interact by a two-body Born-Mayer-Huggins interaction potential with full ionic charges. The potential parametrization was taken from Damodaran et al. [Phys. Chem. Glasses, 31, 212 (1990)1. The simulation box contained about 3000 atoms. For each composition an equilibrated ming Pb03 pyramids with the Pb atom in the vertices or in the middle of an al ost flat triangle formed from forapical oxygens of three different SiO4 tetrahedra. Another of all Pb atoms can be qualified as vertices ofrather distorted square pyramids. The remaining of lead atoms have neighbourhoods difficult to classify. For x 0.67 only a few Pb atoms were identified as remaining in the front of a face of a SiO4 tetrahedron. Most of the Pb atoms are placed in the vertices of edge sharing square PbO4 pyramids. Our MD results are compared with available experimental data. 0.1 X 0.33, about of all Pb atoms is either placed in the front of the faces of the SiO4 tetrahedra, forapical oxygens of three different SiO4 tetrahedra. Another of all Pb atoms can be qualified as vertices of rather distorted square pyramids. The remaining of lead atoms have neighbourhoods difficult to classify. For x 0.67 only a few Pb atoms were identified as remaining in the front of a face of a SiO4 tetrahedron.Pozna

    Capturing composites manufacturing waste flows through process mapping

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    The necessity of high performance materials has become latent in high technology sectors such as aerospace, automotive, renewable energy, nuclear engineering and sports. The expanding impact on future manufacturing of the EU waste management legislation and increasing price of current waste management methods stress the importance of an efficient and sustainable way of recycling waste generated in the composites industry. Aerospace companies estimated that 30e50% of materials in aircraft production are scrapped due to the way it is manufactured. Companies need to pay for landfilling the composite materials that otherwise can be a valuable resource. In a view that looking at individual production waste outputs could maximise the material reuse or recycling capability, gaining information about the type of scrap materials could inform the development of composite reuse/recycling supply chain. This research paper focuses on understanding the scale of scrap created in individual composites manufacturing processes to assess its potential value in terms of reuse/recycle capabilities. A Material flow analysis based data collection workshop has been performed with four composite manufacturers. Through the case studies it has been identified that there are three fibre related waste outputs captured: dry fibres, fibre material sheet off-cuts, and curried composite off-cuts. The captured information allows for the material specification development. This allows bridging the gap between the manufacturers and the waste processors in composites to address the lack of infrastructure and lack of waste material specification barriers outlined by the Composites Strategy 2009

    Interferencje w procesie tworzenia polskiej terminologii glottodydaktycznej

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    Zadanie pt. Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę

    The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1Msun

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    The mass function of hydrogen-rich atmosphere white dwarfs has been frequently found to reveal a distinctive high-mass excess near 1Msun. However, a significant excess of massive white dwarfs has not been detected in the mass function of the largest white dwarf catalogue to date from the Sloan Digital Sky Survey. Hence, whether a high-mass excess exists or not has remained an open question. In this work we build the mass function of the latest catalogue of data release 10 SDSS hydrogen-rich white dwarfs, including the cool and faint population (i.e. effective temperatures 6,000 <~ Teff <~ 12,000 K, equivalent to 12 mag <~ Mbol <~ 13 mag). We show that the high-mass excess is clearly present in our mass function, and that it disappears only if the hottest (brightest) white dwarfs (those with Teff >~ 12,000 K, Mbol <~ 12 mag) are considered. This naturally explains why previous SDSS mass functions failed at detecting a significant excess of high-mass white dwarfs. Thus, our results provide additional and robust observational evidence for the existence of a distinctive high-mass excess near 1Msun. We investigate possible origins of this feature and argue that the most plausible scenario that may lead to an observed excess of massive white dwarfs is the merger of the degenerate core of a giant star with a main sequence or a white dwarf companion during or shortly after a common envelope event.Comment: Accepted for publication by MNRA

    Assessment of the Braking System Damage in the Public Transport Vehicles of a Selected Transport Company

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    This paper analyzes damage to safety systems over a five-year period for a group of vehicles. In the first step of analysis, descriptive statistics characterizing the analyzed variables were calculated and analyses related to the assessment of damage to the braking system. The analyses were carried out in order to examine the relationship between the mileage of vehicles and the number of defects quarterly and monthly and the fit of the obtained empirical results of the analysed variables to a normal or other theoretical distribution was checked. In order to check whether the observed differences in the mean values of the number of failures of the safety systems are statistically significant, a non-parametric analysis of variance was performed. The Kolmogorov-Smirnov test was applied, the distribution of the monthly sum of the braking system faults, distribution of the sum of the braking system faults from individual quarters, distribution of the monthly kilometrage of all vehicles and distribution of the quarterly kilometrage of all vehicles were presented. After describing previous correlation analyses, a linear regression analysis was conducted in which a model was built to predict the number of braking system faults based on monthly vehicle mileage and month of measurement. The last part of the analysis was to verify whether the number of the braking systems faults depends on the season of the year and it was checked whether the season makes any difference to the vehicle's quarterly kilometrage. One-way analysis of variance (ANOVA) was carried out to this end

    IRT Measurement Models for Conjoint Analysis

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    Conjoint analysis and discrete choice models are widely accepted methods for preference measurement in marketing research. However, in all of these methods, the measurement of overall consumer preferences is based on binary, nominal or ordinal scales without implying any measurement model of these overall preferences. The aim of the paper is to propose Item Response Theory (IRT) latent variable models of overall preference measurement model for conjoint analysis. The model–based overall preference index (as a factor or ability scores) may be introduced into traditional conjoint analysis, instead of ordinal or choice-based preferences measured on weak scales without evidence of measure reliability. Two classes of models, Rasch-conjoint and nominal response-conjoint models, are developed and compared in the paper. The advantage of model-based preferences is to control for error of measurement and reliability (via standard error of measurement and test information function) of preference measurement model and the size of potential distortions related to preference scale unreliability and part-worth parameters bias. The comparative analysis based on the banking products described with 5 binary attributes was done on the sample of 542 respondents from 172 households in the southern part of Poland

    A few remarks on the genealogy of the national landscape on the example of Jerzy Smoleński Landscape of Poland and Polish Land in poetry edited by Jan Lorentowicz

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    Artykuł dotyczy refleksji nad krajobrazem na początku XX wieku w polskiej geografii i literaturze. Koncentruje się na mechanizmach, narzędziach i celach dyskursywnego wytwarzania krajobrazu narodowego. Przedmiotem analizy jest Krajobraz Polski Jerzego Smoleńskiego oraz antologia Ziemia polska w pieśni zredagowana przez Jana Lorentowicza. Analizowane zjawiska wskazują na specyficzne reguły widzenia krajobrazu w literaturze, wykorzystujące polonizację, selekcję, idealizację i archaizację. Dowodzą ponadto, że krajobraz zarówno w dyskursie geograficznym, jak i literackim odgrywał istotną rolę w kształtowaniu tożsamości narodowej.The article concerns reflection on the landscape at the beginning of the 20th century in Polish geography and literature. It focuses on mechanisms, tools and goals of discursive production of the national landscape. The subject of the analysis is Jerzy Smoleński’s Landscape of Poland and the anthology Polish land in the poetry edited by Jan Lorentowicz. The analyzed phenomena point to specific rules of landscape view in literature, using polonization, selection, idealization and archaization. They also prove that the landscape in both geographical and literary discourses played an important role in shaping national identity

    The Body in the Factory. About Artur Gruszecki’s Cygarniczka [Mouthpiece]

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    The article is an analysis of the novel Cygarniczka (Mouthpiece) by Artur Gruszecki, published in 1904. It focuses on the situation of women workers in a cigar factory in Krakow, their submission to the factory regime, which is another embodiment of the patriarchal power over the female body. On the other hand, the article emphasizes the acts and microstrategies of resistance presented in the novel, proving the liberation of women from the patriarchal order. The interpretation takes into account the double emancipatory context at the turn of the 19th and 20th centuries – both women and workwomen. The novel presents progressive solutions concerning the working conditions of female workers and is close to emancipated women.Artykuł stanowi analizę opublikowanej w 1904 roku powieści Artura Gruszeckiego Cygarniczka. Koncentruje się na sytuacji robotnic w krakowskiej fabryce cygar, ich podporządkowaniu reżimowi fabrycznemu, jako kolejnemu wcieleniu patriarchalnej władzy nad kobiecym ciałem. Z drugiej strony akcentuje przedstawione w powieści akty i mikrostrategie oporu, dowodzące wyzwalania się kobiet z patriarchalnego porządku. W interpretacji został uwzględniony podwójny kontekst emancypacyjny umiejscowiony na przełomie wieku XIX i XX – zarówno kobiet, jak i pracownic fabryk. Powieść prezentuje progresywne rozwiązania dotyczące warunków pracy robotnic i bliskie środowiskom emancypantek
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