The Experts below are selected from a list of 711 Experts worldwide ranked by ideXlab platform
Costas S Patrickios - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterization and evaluation as transfection reagents of ampholytic Star copolymers effect of Star Architecture
Biomacromolecules, 2006Co-Authors: Theoni K Georgiou, Leonidas A Phylactou, Costas S PatrickiosAbstract:Five Star polymers based on the positively ionizable hydrophilic 2-(dimethylamino)ethyl methacrylate (DMAEMA) and the hydrophobic but hydrolyzable tetrahydropyranyl methacrylate (THPMA) were prepared by group-transfer polymerization (GTP) using ethylene glycol dimethacrylate (EGDMA) as the coupling agent. In particular, four isomeric Star copolymers (one heteroarm, two Star block, and the statistical Star), all with a 3:1 DMAEMA:THPMA molar ratio, plus one Star homopolymer of DMAEMA, with degrees of polymerization of the arms equal to 15, were synthesized. After Star polymer preparation and preliminary characterization, the THPMA units were hydrolyzed to negatively ionizable hydrophilic methacrylic acid (MAA) untis, thus yielding Star polyampholytes. All the Star polyampholytes as well as the commercially available transfection reagent SuperFect were evaluated for their ability to transfect human cervical HeLa cancer cells with the modified plasmid pRLSV40 bearing the enhanced green fluorescent protein (E...
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synthesis characterization and evaluation as transfection reagents of double hydrophilic Star copolymers effect of Star Architecture
Biomacromolecules, 2005Co-Authors: Theoni K Georgiou, Leonidas A Phylactou, Maria Vamvakaki, Costas S PatrickiosAbstract:Five Star polymers of the ionizable hydrophilic 2-(dimethylamino)ethyl methacrylate (DMAEMA) and the nonionic hydrophilic methoxy hexa(ethylene glycol) methacrylate (HEGMA) were prepared by group transfer polymerization (GTP) using ethylene glycol dimethacrylate (EGDMA) as coupling agent. In particular, four isomeric Star copolymers, one heteroarm, two Star block and one statistical Star, with 90% mol DMAEMA and 10% mol HEGMA, plus one Star homopolymer of DMAEMA with degrees of polymerization of the arms equal to 20 were synthesized. The polymers were characterized in terms of their molar masses (MMs) and compositions using gel permeation chromatography (GPC) and proton nuclear magnetic resonance (1H NMR) spectroscopy, respectively. The hydrodynamic diameters in water indicated some aggregation for all the Star polymers except for the statistical copolymer Star, while the pK values of the DMAEMA units were around 7 for all Star polymers. All the Star polymers were evaluated for their ability to transfect ...
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synthesis and characterization of electrolytic amphiphilic model networks based on cross linked Star polymers effect of Star Architecture
Chemistry of Materials, 2002Co-Authors: Costas S PatrickiosAbstract:Amphiphilic model networks of a new structure, that of cross-linked “in-out” Star copolymers, were synthesized by a one-pot preparation using group-transfer polymerization. The networks comprised hydrophobic methyl methacrylate and hydrophilic 2-(dimethylamino)ethyl methacrylate (DMAEMA) moieties. Ethylene glycol dimethacrylate served as the cross-linker. Two heteroarm Star-, two Star-block-, and one statistical Star copolymer-based networks were prepared. The synthesis of the heteroarm Star-based networks involved a four-step addition of monomer/cross-linker/monomer/cross-linker. The simultaneous or sequential addition of two monomers between cross-linking gave statistical- or block-copolymer-based Star networks, respectively. The linear, “arm-first” and “in-out” Star network precursors were characterized in terms of their molecular weight distribution by gel permeation chromatography. Static light scattering was used to assess the absolute weight-average molecular weight of the Star network precursors. ...
F Richard - One of the best experts on this subject based on the ideXlab platform.
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N × N coupler uniformity in a CWDM passive Star home network based on multimode fiber: A time-effective calculation method
IEEE OSA Journal of Optical Communications and Networking, 2012Co-Authors: F Richard, Ph Guignard, A Pizzinat, Eric Tanguy, Hong Wu LiAbstract:Optical fiber is the most appropriate medium able to meet future requirements in terms of capacity and heterogeneity in the home network. The advantages of a passive Star Architecture associated with wavelength multiplexing have already been reported. For lower-cost issues, multimode fiber would be preferred, but some problems were raised related to poor uniformity of the N × N multimode coupler when using the usual coarse wavelength division multiplexing sources. An original time-effective method is proposed, based on both simulation and calculation. Many results are provided, giving a better understanding of the behavior of the N × N coupler when different types of sources are used, also taking into account improvement techniques such as offset launching or mode scrambling.
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N x N coupler uniformity in a CWDM passive Star home network based on multimode fiber: A time-effective calculation method
Journal of Optical Communications and Networking, 2012Co-Authors: F Richard, Ph Guignard, A Pizzinat, Eric Tanguy, Hong Wu LiAbstract:Optical fiber is the most appropriate medium able to meet future requirements in terms of capacity and heterogeneity in the home network. The advantages of a passive Star Architecture associated with wavelength multiplexing have already been reported. For lower-cost issues, multimode fiber would be preferred, but some problems were raised related to poor uniformity of the N £ N multimode coupler when using the usual coarse wavelength division multiplexing sources. An original time-effective method is proposed, based on both simulation and calculation. Many results are provided, giving a better understanding of the behavior of the N £ N coupler when different types of sources are used, also taking into account improvement techniques such as offset launching or mode scrambling.
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cwdm broadcast and select home network based on multimode fibre and a passive Star Architecture
Advanced Photonics & Renewable Energy (2010) paper AWB3, 2010Co-Authors: F Richard, Ph Guignard, J Guillory, L Guillo, A Pizzinat, A M J KoonenAbstract:We present a high capacity home network based on a multimode passive Star and WDM technology, implementing triple play over IP, P2P Gigabit Ethernet and TV broadcasting. Issues concerning the use of MMF are discussed.
Hong Wu Li - One of the best experts on this subject based on the ideXlab platform.
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N x N coupler uniformity in a CWDM passive Star home network based on multimode fiber: A time-effective calculation method
Journal of Optical Communications and Networking, 2012Co-Authors: F Richard, Ph Guignard, A Pizzinat, Eric Tanguy, Hong Wu LiAbstract:Optical fiber is the most appropriate medium able to meet future requirements in terms of capacity and heterogeneity in the home network. The advantages of a passive Star Architecture associated with wavelength multiplexing have already been reported. For lower-cost issues, multimode fiber would be preferred, but some problems were raised related to poor uniformity of the N £ N multimode coupler when using the usual coarse wavelength division multiplexing sources. An original time-effective method is proposed, based on both simulation and calculation. Many results are provided, giving a better understanding of the behavior of the N £ N coupler when different types of sources are used, also taking into account improvement techniques such as offset launching or mode scrambling.
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N × N coupler uniformity in a CWDM passive Star home network based on multimode fiber: A time-effective calculation method
IEEE OSA Journal of Optical Communications and Networking, 2012Co-Authors: F Richard, Ph Guignard, A Pizzinat, Eric Tanguy, Hong Wu LiAbstract:Optical fiber is the most appropriate medium able to meet future requirements in terms of capacity and heterogeneity in the home network. The advantages of a passive Star Architecture associated with wavelength multiplexing have already been reported. For lower-cost issues, multimode fiber would be preferred, but some problems were raised related to poor uniformity of the N × N multimode coupler when using the usual coarse wavelength division multiplexing sources. An original time-effective method is proposed, based on both simulation and calculation. Many results are provided, giving a better understanding of the behavior of the N × N coupler when different types of sources are used, also taking into account improvement techniques such as offset launching or mode scrambling.
Alain Thierstein - One of the best experts on this subject based on the ideXlab platform.
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Star Architecture’s Interplays and Effects on Cities
About Star Architecture, 2020Co-Authors: Alain Thierstein, Nadia Alaily-mattar, Johannes DreherAbstract:This chapter presents a conceptual impact model which can be used as a tool to research the impact of Star Architecture projects. We distinguish in this chapter between Star Architecture as a process and as an output. We use the term Star Architecture projects to refer to a process in which Starting conditions result in the mobilisation of inputs, to produce outputs and generate effects. We regard Star Architecture as one such output composed of complex and dynamic bundled offerings. The effects that are generated can be plentiful, as it was explained in the various chapters of this volume. This chapter presents a conceptual impact model that was developed as a tool with a threefold purpose: (1) to analytically identify the outputs of these special projects, (2) to help assess if and how these outputs can be related to effects in a causal relationship and (3) to offer a didactic means to debate the manifold elements associated with the impact of Star Architecture projects.
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Star Architecture s interplays and effects on cities
2020Co-Authors: Alain Thierstein, Nadia Alailymattar, Johannes DreherAbstract:This chapter presents a conceptual impact model which can be used as a tool to research the impact of Star Architecture projects. We distinguish in this chapter between Star Architecture as a process and as an output. We use the term Star Architecture projects to refer to a process in which Starting conditions result in the mobilisation of inputs, to produce outputs and generate effects. We regard Star Architecture as one such output composed of complex and dynamic bundled offerings. The effects that are generated can be plentiful, as it was explained in the various chapters of this volume. This chapter presents a conceptual impact model that was developed as a tool with a threefold purpose: (1) to analytically identify the outputs of these special projects, (2) to help assess if and how these outputs can be related to effects in a causal relationship and (3) to offer a didactic means to debate the manifold elements associated with the impact of Star Architecture projects.
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the circulation of news and images Star Architecture and its media effects
2020Co-Authors: Nadia Alailymattar, Alain ThiersteinAbstract:Based on the idea that Star Architecture projects cannot be read at ground level only, instead, the media is their primary site of reading as Foster (2008) has argued of Pop Architecture, this chapter reads Star Architecture projects through the media. The “Bilbao effect” idea has supported the circulation of the unproven assumption that a Star Architecture project can disrupt or transform the image of a city in the media. Making use of case studies of three public cultural facilities commissioned to Star architects and put into use in three medium-sized cities in Europe in the past 10 years, this chapter investigates the extent to which a transformation of exposure in the print media has accompanied the development of Star Architecture projects in their respective cities. Findings of quantitative research of selected international and national newspapers and media platforms are presented. This chapter concludes that despite possible increase in the inauguration year, Star Architecture can have quite short-lived quantitative media effects.
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the multifarious effects of Star Architecture the case of the kunsthaus graz
2020Co-Authors: Johannes Dreher, Nadia Alailymattar, Alain ThiersteinAbstract:Many studies on Star Architecture projects examine only some of their isolated aspects, thus highlighting certain effects and downplaying others. Drawing on the case study of the Kunsthaus Graz, this chapter gives a comprehensive account of the wide range of effects of a Star Architecture project. After the overview of the Kunsthaus Graz development process is presented, the effects which were intended by the project’s proponents are stated. These intended effects include attracting tourists, inducing identification and citizen pride, diversifying the economy and urban regeneration. On the basis of the formulated objectives, an investigation is carried out to determine the extent to which the Kunsthaus Graz fulfils these objectives. In addition, unintended, but incipient, effects are examined. The chapter cautions that a Star Architecture project must not be analysed as a single or homogenous entity. Rather such projects must be understood as a project development process, in which a physical building with Star Architecture attributes is developed on a specific location in a city to house a function which is operated by an institution. Unpacking Star Architecture projects assists in analysing more accurately how effects are generated.
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introduction Star Architecture in and across cities in europe
2020Co-Authors: Davide Ponzini, Nadia Alailymattar, Alain ThiersteinAbstract:In the last three decades, urban decision makers in the Western world increasingly promote and build exceptional Architecture projects such as iconic museums, spectacular infrastructures or public spaces not only for branding their city image and boosting media attention. Star Architecture remains somehow a vague term, and the attention to the exceptional powers of architects still dominates the architectural, planning and public debates. More recently, research and publications can be found that make attempts to mix perspectives from Architecture to urban planning to geography, economy and media studies, yet a consistent framework for these debates is missing. This introductory chapter provides a framework, problematising the definition of Star Architecture and its interplays with the transformation of the urban environment; it explains the reasons why studying the topic in the European context is important and useful for a world audience. This chapter presents the various disciplines involved and the multiple perspectives and methods adopted in each of the respective chapters. The structure of the volume and contents of each chapter are outlined to introduce the readers to this edited book.
Ph Guignard - One of the best experts on this subject based on the ideXlab platform.
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N × N coupler uniformity in a CWDM passive Star home network based on multimode fiber: A time-effective calculation method
IEEE OSA Journal of Optical Communications and Networking, 2012Co-Authors: F Richard, Ph Guignard, A Pizzinat, Eric Tanguy, Hong Wu LiAbstract:Optical fiber is the most appropriate medium able to meet future requirements in terms of capacity and heterogeneity in the home network. The advantages of a passive Star Architecture associated with wavelength multiplexing have already been reported. For lower-cost issues, multimode fiber would be preferred, but some problems were raised related to poor uniformity of the N × N multimode coupler when using the usual coarse wavelength division multiplexing sources. An original time-effective method is proposed, based on both simulation and calculation. Many results are provided, giving a better understanding of the behavior of the N × N coupler when different types of sources are used, also taking into account improvement techniques such as offset launching or mode scrambling.
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N x N coupler uniformity in a CWDM passive Star home network based on multimode fiber: A time-effective calculation method
Journal of Optical Communications and Networking, 2012Co-Authors: F Richard, Ph Guignard, A Pizzinat, Eric Tanguy, Hong Wu LiAbstract:Optical fiber is the most appropriate medium able to meet future requirements in terms of capacity and heterogeneity in the home network. The advantages of a passive Star Architecture associated with wavelength multiplexing have already been reported. For lower-cost issues, multimode fiber would be preferred, but some problems were raised related to poor uniformity of the N £ N multimode coupler when using the usual coarse wavelength division multiplexing sources. An original time-effective method is proposed, based on both simulation and calculation. Many results are provided, giving a better understanding of the behavior of the N £ N coupler when different types of sources are used, also taking into account improvement techniques such as offset launching or mode scrambling.
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cwdm broadcast and select home network based on multimode fibre and a passive Star Architecture
Advanced Photonics & Renewable Energy (2010) paper AWB3, 2010Co-Authors: F Richard, Ph Guignard, J Guillory, L Guillo, A Pizzinat, A M J KoonenAbstract:We present a high capacity home network based on a multimode passive Star and WDM technology, implementing triple play over IP, P2P Gigabit Ethernet and TV broadcasting. Issues concerning the use of MMF are discussed.
