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81.
Software and Systems Modeling - The construction and maintenance of model-to-model and model-to-text transformations pose numerous challenges to novice and expert developers. A key challenge... 相似文献
82.
Spiros Mouzakitis Dimitris Papaspyros Michael Petychakis Sotiris Koussouris Anastasios Zafeiropoulos Eleni Fotopoulou Lena Farid Fabrizio Orlandi Judie Attard John Psarras 《Information Systems Frontiers》2017,19(2):321-336
Linked Data has become the current W3C recommended approach for publishing data on the World Wide Web as it is sharable, extensible, and easily re-usable. An ecosystem of linked data hubs in the Public Sector has the potential to offer significant benefits to its consumers (other public offices and ministries, as well as researchers, citizens and SMEs), such as increased accessibility and re-use value of their data through the use of web-scale identifiers and easy interlinking with datasets of other public data providers. The power and flexibility of the schema-defying Linked Data, however, is counterbalanced by inborn factors that diminish the potential for cost-effective and efficient adoption by the Public Sector. The paper analyzes these challenges in view of the current state-of-the-art in linked data technologies and proposes a technical framework that aims to hide the underlying complexity of linked data while maintaining and promoting the interlinking capabilities enabled by the Linked Data Paradigm. The paper presents the innovations behind our proposed solutions as well as their advantages, especially for the non-expert users. 相似文献
83.
Vouros Avgoustinos Langdell Stephen Croucher Mike Vasilaki Eleni 《Machine Learning》2021,110(8):1975-2003
Machine Learning - K-Means is one of the most used algorithms for data clustering and the usual clustering method for benchmarking. Despite its wide application it is well-known that it suffers... 相似文献
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Eleni Lioliou Angelika Zimmermann Leslie Willcocks Lan Gao 《Information Systems Journal》2014,24(6):503-535
This study aims to contribute to the literature on IT outsourcing governance by advancing our understanding of mechanisms of substitution and complementarity between formal and relational governance. Our study illustrates certain conditions under which substitution and complementarity can occur and depicts a two‐way causal relationship between them. Our examination further provides a more in‐depth assessment of relational governance by using the concept of the psychological contract. Our results demonstrate that the psychologically binding nature of the psychological contract makes it a particularly forceful substitute to formal governance, while its associations with other relationship aspects make it a forceful complement. 相似文献
86.
Eleni Kosta Christos Kalloniatis Lilian Mitrou Evangelia Kavakli 《Requirements Engineering》2011,16(1):47-54
Nowadays, Internet users are depending on various search engines in order to be able to find requested information on the
Web. Although most users feel that they are and remain anonymous when they place their search queries, reality proves otherwise.
The increasing importance of search engines for the location of the desired information on the Internet usually leads to considerable
inroads into the privacy of users. A heated debate is currently ongoing at European level regarding the question if search
engine providers that are established outside the European Union are covered by the European data protection framework and
the obligations it imposes on entities that process personal data. The scope of this paper is to examine the applicability
of the European data protection legislation to non-EU-based search engine providers and to study the main privacy issues with
regard to search engines, such as the character of search logs, their anonymisation and their retention period. Ixquick, a
privacy-friendly meta-search engine, will be presented as an alternative to privacy intrusive existing practices of search
engines. 相似文献
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Panayiotis Bilalis Eleni K. Efthimiadou Alexandros Chatzipavlidis Nikos Boukos George C. Kordas 《Polymer International》2012,61(6):888-894
Temperature and pH responsive poly(N‐isopropylacrylamide‐co‐methacrylic acid) (P(NIPAAm‐co‐MAA)) microcontainers with encapsulated magnetic nanoparticles in the shell were prepared by a two‐stage distillation precipitation polymerization. PMAA@Fe3O4/P(NIPAAm‐co‐MAA) core–shell nanoparticles were synthesized by the second‐stage polymerization of NIPAAm, MAA and N, N′‐methylenebisacrylamide as crosslinker in the presence of magnetic nanoparticles and PMAA as core. These novel triple‐functional microcontainers were prepared by selective removal of the PMAA core in water. Daunorubicin hydrochloride (DNR) was loaded into the microcontainers and the release profile was studied by UV–visible spectroscopy. The synthesized nanostructures were characterized with transmission and scanning electron microscopy, X‐ray diffraction and Fourier transform infrared spectroscopy. The magnetic properties were evaluated by vibrating sample magnetometry. The shrink and swelling behavior was studied by dynamic light scattering. Copyright © 2012 Society of Chemical Industry 相似文献
90.
Nikolaos Chouliaras Fotios Gravanis Ioannis Vasilakoglou Nikolaos Gougoulias Ioannis Vagelas Thomas Kapotis Eleni Wogiatzi 《Journal of the science of food and agriculture》2007,87(13):2416-2419
The effects of basil (Ocimum basilicum L.) on soil organic matter biodegradation, nutritional mineral elements and bacterial colonies were studied in the laboratory. The air‐dried basil plant tissues incorporated at five different rates (0, 1, 2, 3, and 4 g per 50 g of soil) resulted in increases in organic carbon mineralization, mineral nitrogen forms in organic phosphorus and available potassium. The level of available forms of manganese and zinc was increased at all the rates of added basil whereas copper was increased at the two upper rates. Also, the addition of basil resulted in a decrease in soil bacterial colonies. The results of this study indicated that the basil could be used as a cover crop for suppressing weed or pathogens in organic soils, with a positive effect on soil productivity. In addition, the incorporation of basil in soil could reduce the number of bacterial colonies. Copyright © 2007 Society of Chemical Industry 相似文献