bluuebunny/crossref_metadata_2025_split huggingface dataset:
Consumers' perceptions of the dimensions of brand personality
Authors: Maehle Natalia , Otnes Cele , Supphellen Magne 
Published: April 2011

AbstractBrand personality (human‐like characteristics of a brand) has been a popular topic in the marketing literature for over 50 years. However, there is a lack of consumer‐focused studies investigating what factors shape perceptions of brand personality. To address this gap, the purpose of the current study is to understand how consumers form their perceptions of the different dimensions of brand personality identified in Aaker's scale (sincerity, excitement, competence, sophistication and ruggedness), and what product or brand characteristics influence these perceptions. Sixty‐six interviews were conducted with graduate students, who were asked to discuss which brands reflected the specific dimensions of brand personality in Aaker's scale. As a result, we identify the kinds of brands consumers perceive as typical for each personality dimension, discover their common characteristics and explain the reasons why some brands are strongly associated with a particular dimension and some are not. Our findings indicate that specific brand personality dimensions are associated with particular product categories. However, brands mentioned as strong on respective personality dimensions share commonalities beyond just a product category. For instance, sincere brands share family‐related associations and high morals, exciting brands offer consumers the opportunity to experience exciting feelings and are related to special ‘exciting’ occasions, competent brands are mostly associated with expertise and quality, sophisticated brands are usually of feminine nature, whereas rugged brands are of masculine nature. Moreover, we find that brands which consumers perceive as lacking on a particular personality dimension also share common attributes.Copyright © 2011 John Wiley & Sons, Ltd.
A Continuous Symmetry Analysis of Chemical Bonding
Authors: Dryzun Chaim , Alemany Pere , Casanova David , Avnir David 
Published: April 2011

AbstractThe ability to quantify the symmetry content of a given molecular system is important both for the quantitative prediction of its physical and chemical properties, as well as for the establishment of powerful theoretical concepts that can be derived solely from symmetry considerations. The symmetry content of a complex object such as a molecule relies, however, on the level of structural description that is chosen. This may range form a simple geometrical picture in which only the position of the nuclei is indicated, to a more or less detailed description of the electronic structure given by the different quantum chemical methods. Recently, a paper was published describing a new general methodology for calculating the symmetry content of diverse mathematical objects, such as vectors, operators, matrices, functions and more. In the present work we apply that approach to explore the inversion symmetry for diatomic molecules. Although it is a very simple system, general physical conclusions on the phenomenon of chemical bonding can be easily obtained from the symmetry analysis at different levels of description.
Ring‐Closing Metathesis of Sulfoximine‐Substituted N‐Tethered Trienes: Modular Asymmetric Synthesis of Medium‐Ring Nitrogen Heterocycles
Authors: Mahajan Vishal , Gais Hans‐Joachim 
Published: April 2011

AbstractA synthesis of sulfoximine‐substituted medium‐ring nitrogen heterocycles (MRNHs) having a high degree of substitution has been developed. Its key steps are the modular asymmetric synthesis of sulfoximine‐substituted N‐tethered trienes and their Ru‐catalyzed ring‐closing metathesis (RCM) reaction. The highly substituted N‐tethered trienes were obtained enantio‐ and diastereopure through 1) the diastereoselective aminoalkylation of sulfoximine‐substituted allyltitanium complexes with N‐tert‐butylsulfonyliminoester, 2) N‐allylation of homoallylic N‐sulfonyl amines, 3) allylation, hydroxylalkylation, and formylation of α‐lithioalkenylsulfoximines, and 4) allylation of α‐formylalkenylsulfoximines. The Ru‐catalyzed RCM reaction of the sulfoximine‐substituted 1,7,10‐ and 1,7,12‐trienes stereoselectively afforded the corresponding nine‐, ten‐, and eleven‐membered MRNHs in good yields. An interesting difference in reactivity was noted in the case of a sulfoximine‐substituted 1,7,10‐triene and its corresponding 1,10‐diene. While the triene readily underwent a RCM reaction, the diene reacted only in the presence of Ti(OiPr)4 under formation of the corresponding MRNH. The feasibility of a removal of the sulfoximine auxiliary and the N‐sulfonyl protecting group from the MRNHs were demonstrated through reduction and cleavage, respectively, of a nine‐membered heterocycle, both of which proceeded readily and gave the corresponding cyclic alkene and amine, respectively.
CH Activation versus Yttrium–Methyl Cation Formation from [Y(AlMe4)3] Induced by Cyclic Polynitrogen Bases: Solvent and Substituent‐Size Effects
Authors: Bojer Daniel , Venugopal Ajay , Mix Andreas , Neumann Beate , Stammler Hans‐Georg , Mitzel Norbert W. 
Published: April 2011

AbstractThe reaction of 1,3,5‐triisopropyl‐1,3,5‐triazacyclohexane (TiPTAC) with [Y(AlMe4)3] resulted in the formation of [(TiPTAC)Y(Me3AlCH2AlMe3)(μ‐MeAlMe3)] by CH activation and methane extrusion. In contrast, the presence of bulkier cyclohexyl groups on the nitrogen atoms in 1,3,5‐tricyclohexyl‐1,3,5‐triazacyclohexane (TCyTAC) led to the formation of the cationic dimethyl complex [(TCyTAC)2YMe2][AlMe4]. The investigations reveal a dependency of the reaction mechanism on the steric bulk of the N‐alkyl entity and the solvent employed. In toluene CH activation was observed in reactions of [Y(AlMe4)3] with 1,3,5‐trimethyl‐1,3,5‐triazacyclohexane (TMTAC) and TiPTAC. In THF molecular dimethyl cations, such as [(TCyTAC)2YMe2][AlMe4], [(TMTAC)2YMe2][AlMe4] and [(TiPTAC)2YMe2][AlMe4], could be synthesised by addition of the triazacyclohexane at a later stage. The THF‐solvated complex [YMe2(thf)5][AlMe4] could be isolated and represents an intermediate in these reactions. It shows that cationic methyl complexes of the rare‐earth metals can be formed by donor‐induced cleavage of the rare‐earth‐metal tetramethylaluminates. The compounds were characterised by single‐crystal X‐ray diffraction or multinuclear and variable‐temperature NMR spectroscopy, as well as elemental analyses. Variable‐temperature NMR spectroscopy illustrates the methyl group exchange processes between the cations and anions in solution.
Regular Acyclic and Macrocyclic [AB] Oligomers by Formation of Push–Pull Chromophores in the Chain‐Growth Step
Authors: Silvestri Fabio , Jordan Markus , Howes Kara , Kivala Milan , Rivera‐Fuentes Pablo , Boudon Corinne , Gisselbrecht Jean‐Paul , Schweizer W. Bernd , Seiler Paul , Chiu Melanie , Diederich François 
Published: April 2011

AbstractThe substrate scope of the [2+2] cycloaddition–cycloreversion (CA–CR) reaction between electron‐deficient (2,2‐dicyanovinyl)benzene (DCVB) or (1,2,2‐tricyanovinyl)benzene (TCVB) derivatives and N,N‐dimethylanilino (DMA)‐substituted acetylenes was investigated. The structural features of the cyanobutadiene products of these transformations were examined and the rates of selected CA–CR reactions were measured. Rate constants for reactions utilizing pentafluorinated TCVB and DCVB were found to be one to two orders of magnitude larger than those for the unsubstituted analogues. Multiple, consecutive CA–CR reactions were performed with substrates incorporating two reactive 2,2‐cyanovinyl or 4‐ethynylanilino sites. 1,4‐Bis(2,2‐dicyanovinyl)‐2,3,5,6‐tetrafluorobenzene and 1,4‐bis[(4′‐dihexylamino)phenylethynyl]benzene were selected as suitably reactive monomers for the synthesis of regular [AB] oligomers wherein the push–pull chromophores were formed in the chain‐growth step. Oligomers of two types were isolated: macrocyclic [AB]n and open‐chain B[AB]n oligomers, with n≤4.
Coenzyme Q Functionalized CdTe/ZnS Quantum Dots for Reactive Oxygen Species (ROS) Imaging
Authors: Qin Li‐Xia , Ma Wei , Li Da‐Wei , Li Yang , Chen Xiaoyuan , Kraatz Heinz‐Bernhard , James Tony D. , Long Yi‐Tao 
Published: April 2011

AbstractQuantum dots (QDs) have been widely used for fluorescent imaging in cells. In particular, surface functionalized QDs are of interest, since they possess the ability to recognize and detect the analytes in the surrounding nanoscale environment based on electron and hole transfer between the analytes and the QDs. Here we demonstrate that fluorescence enhancement/quenching in QDs can be switched by electrochemically modulating electron transfer between attached molecules and QDs. For this purpose, a number of redox‐active coenzyme Q (CoQ) disulfide derivatives [CoQCnS]2 were synthesized with different alkyl chain lengths (n=1, 5, and 10). The system supremely sensitive to NADH (nicotinamide adenine dinucleotide) and superoxide radical (O2.−), and represents a biomimetic electron‐transfer system, modeling part of the mitochondrial respiratory chain. The results of our in situ fluorescence spectroelectrochemical study demonstrate that the reduced state of [CoQCnS]2 significantly enhanced the fluorescence intensity of CdTe/ZnS QDs, while the oxidized state of the CoQ conjugates quench the fluorescence to varying degrees. Fluorescence imaging of cells loaded with the conjugate QD‐[CoQCnS]2 displayed strikingly differences in the fluorescence depending on the redox state of the capping layer, thus introducing a handle for evaluating the status of the cellular redox potential status. Moreover, an MTT assay (MTT=3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide) proved that the cytotoxicity of QDs was significantly reduced after immobilization by CoQ derivatives. Those unique features make CoQ derivatived QDs as a promising probe to image redox coenzyme function in vitro and in vivo.
Distribution of the auxiliary GABAB receptor subunits KCTD8, 12, 12b, and 16 in the mouse brain
Authors: Metz Michaela , Gassmann Martin , Fakler Bernd , Schaeren‐Wiemers Nicole , Bettler Bernhard 
Published: April 2011

AbstractGABAB receptors are the G‐protein‐coupled receptors for γ‐aminobutyric acid (GABA). KCTD8, 12, 12b, and 16 were recently identified as auxiliary GABAB receptor subunits and distinctly influence biophysical and pharmacological properties of the receptor response. Here we examined the expression patterns of the KCTDs in the mouse brain. Using in situ hybridization analysis, we found that most neurons express KCTD transcripts, supporting biochemical data showing that most GABAB receptors in the brain incorporate KCTD proteins. In the adult brain, KCTD12 and 16 have a widespread and KCTD8 and 12b a restricted expression pattern. Individual neurons can coexpress multiple KCTDs, as shown for granule cells and CA1/CA3 pyramidal cells in the hippocampus that coexpress KCTD12 and 16. In contrast, granule, Purkinje, and Golgi cells in the cerebellum selectively express one KCTD at a time. The expression levels of individual KCTD transcripts vary during postnatal brain development. Immunohistochemistry reveals that individual KCTD proteins can exhibit distinct axonal or dendritic localizations in neuronal populations. KCTDs are also detectable in nonneuronal tissues not expected to express GABAB receptors, suggesting that the role of KCTD proteins extends beyond GABAB receptors. In summary, our findings support that most brain GABAB receptors associate with KCTD proteins, but that the repertoire and abundance of KCTDs varies during development, among brain areas, neuronal populations, and at subcellular sites. We propose that the distinct spatial and temporal KCTD distribution patterns underlie functional differences in native GABAB responses. J. Comp. Neurol. 519:1435–1454, 2011. © 2011 Wiley‐Liss, Inc.
Tabu search heuristics for workflow resource allocation simulation optimization
Authors: Yu Yang , Pan Maolin , Li Xuguang , Jiang Huan 
Published: April 2011

AbstractResource allocation of workflow has a direct impact on the average execution time of process instances and the cost of an enterprise. Through simulation optimization, resource allocation can be optimized to increase throughput. In the current research, mathematical analysis‐based optimization methods are used to solve the resource allocation problem. These methods are restricted in their application scope. Based on an analysis of the relationship between resource allocation and process instance response time, heuristics for workflow resource simulation optimization through tabu search is proposed in this paper. Experiment shows that it can remarkably improve the efficiency and result of the optimization. Copyright © 2011 John Wiley & Sons, Ltd.
A liveness condition for concurrent objects: x‐wait‐freedom
Authors: Imbs Damien , Raynal Michel 
Published: April 2011

SUMMARYThe liveness of concurrent objects despite asynchrony and failures is a fundamental problem. To that end several progress conditions have been proposed. Wait‐freedom is the strongest of these conditions: it states that any object operation must terminate if the invoking process does not crash. Obstruction‐freedom is a weaker progress condition as it requires progress only when a process executes in isolation for a long enough period. This paper explores progress conditions in n‐process asynchronous read/write systems enriched with base objects with consensus number x, 1<x≤n(i.e. objects that wait‐free solve consensus in a set of x processes). It is easy to solve consensus in such a system if progress is required only when one of the x processes allowed to access the underlying consensus object invokes this object and does not crash. This paper proposes and investigates a stronger progress condition that we call x‐wait‐freedom (n‐wait‐freedom is wait‐freedom). This condition includes additional scenarios in which progress is required even when none of the x processes allowed to access the underlying consensus object participates. The paper then presents and proves correct a consensus algorithm that satisfies this progress condition. Copyright © 2011 John Wiley & Sons, Ltd.
Autonomic streaming pipeline for scientific workflows
Authors: Tolosana‐Calasanz Rafael , Bañares José A. , Rana Omer F. 
Published: April 2011

AbstractInterest in data streaming within scientific workflow has increased significantly over the recent years—mainly due to the emergence of data‐driven applications. Such applications can include data streaming from sensors and data coupling between scientific simulations. To support resource management to enact such streaming‐based workflow, autonomic computing techniques for transmission have been combined with in‐transit processing, so that data elements may be processed in advance, enroute, prior to arrival at the destination. We propose the integration of an autonomic data streaming service (ADSS) with in‐transit processing into a workflow specification. This integration may imply that the associated runtime resource allocation is dependent on environmental conditions and can change for different enactments of the same workflow. In our proposal, our workflow specifications are independent of the constraints imposed by the resource allocation. We express our solutions in terms of Reference nets. We also implement an ADSS utilizing a timed Reference net simulation for predicting future states of the ADSS. There are two advantages: the Reference net which implements the ADSS and the timed model are coincident, and second, token distribution obtained from the Petri net implementation can be utilized to better understand the demand for particular types of resources in the system. Copyright © 2011 John Wiley & Sons, Ltd.
eMOLST: a documentation flow for distributed health informatics
Authors: von Laszewski Gregor , Dayal Jai , Wang Lizhe 
Published: April 2011

AbstractElectronic Health Records (EHRs) have many potential advantages over traditional paper records, such as wide scale access, error checking, and protection from physical damage to a record. As with any medical record, paper or electronic, both the patient's privacy and the document's integrity must be guaranteed. With initiatives such as Integrating the Healthcare Enterprise (IHE), computerized healthcare systems are able to share EHRs on a large scale, while protecting the patient's privacy rights. However, IHE does not yet meet the needs of all healthcare systems, as we will show with the eMOLST project. The eMOLST project delivers software in support of Medical Order for Life Sustaining Treatment (MOLST) forms and uses IHE specifications for cross enterprise document storage and sharing, patient identification, and user authentication and authorization. The Web‐based system provides secure access to electronic MOLST documents regardless of the patient's or healthcare provider's location. The eMOLST project allows a user to have Single Sign On (SSO) access to the system from either the user's associated enterprise, or through a Web portal shared amongst all users across all enterprises. In this paper, we show a security solution to allow SSO from multiple access points for IHE compliant systems. Copyright © 2011 John Wiley & Sons, Ltd.
Access control and authorization for protecting disseminative information in E‐learning workflow
Authors: Sun Lili , Wang Hua 
Published: April 2011

AbstractE‐learning defined as learning activities performed over electronic devices is rapidly increasing and has become one of the key e‐commerce applications with a growing commercial market in the near future. Access control and authorization in E‐learning workflow is a vital problem with low costs and no location limits for students. E‐learning organizers prefer to disseminate their message as widely as possible, while at the same time authorized people only are able to access disseminative information. However, in the E‐learning workflow it is a challenge to protect from access, such as reading and updating, the digital message that has been disseminated out from the organizations. This paper aims to substantially provide a foundation for developing appropriate security solutions for organizations' secure dissemination of digital information. An application‐level secure architecture is developed based on the references on both server side and client side. The architecture provides control and tracking capabilities for dissemination and usage of digital information while others provide only tracking capability. The outcomes of this paper can immediately apply to prevent unauthorized dissemination of digital content amongst agents of universities regardless of their intention or possession of the digital information and will contribute to higher security in E‐learning. Copyright © 2011 John Wiley & Sons, Ltd.
Offspring from intracytoplasmic sperm injection of aged mouse oocytes treated with caffeine or MG132
Authors: Ono Tetsuo , Mizutani Eiji , Li Chong , Yamagata Kazuo , Wakayama Teruhiko 
Published: April 2011

AbstractPostovulatory mammalian oocytes age significantly in culture. B6D2F1 or ICR strain mouse oocytes were collected 16 h after hCG injection and then cultured for up to 40 h post hCG at 37°C under 5% CO2 in air. After intracytoplasmic sperm injection (ICSI), B6D2F1 and ICR oocytes lost full‐term developmental potential by 30 h and 26 h after hCG administration, respectively. However, using supplementation with 10 mM caffeine or 1‐5 μM of MG132, we could obtain live offspring from oocytes at 34 h (BDF1, 5%–21%) or 28 h (ICR, 5%–18%), whereas none were obtained from untreated aged oocytes. Caffeine maintained normal meiotic spindle morphology, whereas MG132 maintained maturation‐promoting factor activity. These treatments did not affect the potential of fresh oocytes for fertilization and subsequent development. Thus, it should be safe to use these chemicals in routine in vitro fertilization and offspring could be generated by ICSI of aged fertilization failed oocytes. genesis 49:460–471, 2011. © 2011 Wiley‐Liss, Inc.
Inducible recombination in the cardiac conduction system of minK: CreERT2 BAC transgenic mice
Authors: Arnolds David E. , Moskowitz Ivan P. 
Published: April 2011

AbstractInducible Cre recombination is a powerful technology that allows for spatial and temporal modulation of gene expression in vivo. Diseases of the cardiac conduction system (CCS) pose a significant clinical burden but are not currently well understood at the molecular level. To enable inducible recombination in the murine CCS, we created a minK:CreERT2 bacterial artificial chromosome (BAC) transgenic mouse line. Cre activity is present after tamoxifen administration in the atrioventricular (AV) node, AV bundle, and bundle branches of adult transgenic mice. We anticipate that by enabling inducible recombination specifically in the AV node, bundle, and bundle branches, minK:CreERT2 BAC transgenic mice will prove useful in advancing our understanding of CCS disease and function. genesis 49:878–884, 2011. © 2011 Wiley‐Periodicals, Inc.
Toward high‐content/high‐throughput imaging and analysis of embryonic morphogenesis
Authors: Truong Thai V. , Supatto Willy 
Published: April 2011

AbstractIn vivo study of embryonic morphogenesis tremendously benefits from recent advances in live microscopy and computational analyses. Quantitative and automated investigation of morphogenetic processes opens the field to high‐content and high‐throughput strategies. Following experimental workflow currently developed in cell biology, we identify the key challenges for applying such strategies in developmental biology. We review the recent progress in embryo preparation and manipulation, live imaging, data registration, image segmentation, feature computation, and data mining dedicated to the study of embryonic morphogenesis. We discuss a selection of pioneering studies that tackled the current methodological bottlenecks and illustrated the investigation of morphogenetic processes in vivo using quantitative and automated imaging and analysis of hundreds or thousands of cells simultaneously, paving the way for high‐content/high‐throughput strategies and systems analysis of embryonic morphogenesis. genesis 49:555–569, 2011. © 2011 Wiley‐Liss, Inc.
Synthesis and Crystal Structures of μ‐Oxido‐ and μ‐Hydroxido‐Bridged Dinuclear Iron(III) Complexes with an N2O Donor Ligand – A Theoretical Study on the Influence of Weak Forces on the Fe–O–Fe Bridging Angle
Authors: Biswas Rituparna , Drew Michael G. B. , Estarellas Carolina , Frontera Antonio , Ghosh Ashutosh 
Published: April 2011

AbstractThe synthesis and crystal structures of three nonheme diiron(III) complexes with a tridentate N,N,O Schiff‐baseligand, 2‐({[2‐(dimethylamino)ethyl]imino}methyl)phenol (HL), are reported. Complexes [Fe2OL2(NCO)2] (1a) and [Fe2OL2(SAL)2]·H2O [SAL =o‐(CHO)C6H4O–] (1b) are unsupported μ‐oxido‐bridged dimers, and [Fe2(OH)L2(HCOO)2(Cl)] (2) is a μ‐hydroxido‐bridged dimer supported by a formato bridging ligand. All complexes have been characterized by X‐ray crystallography and spectroscopic analysis. Complex1bhas been reported previously; however, it has been reinvestigated to confirm the presence of a crucial water molecule in the solid state. Structural analyses show that in1athe iron atoms are pentacoordinate with a bent Fe–O–Fe angle [142.7(2)°], whereas in2the metal centers are hexacoordinate with a normal Fe–OH–Fe bridging angle [137.9(2)°]. The Fe–O–Fe angles in complexes1aand1bdiffer significantly to those usually shown by (μ‐oxido)FeIIIcomplexes. A theoretical study has been performed in order to rationalize this deviation. Moreover, the influence of the water molecule observed in the solid‐state structure of1bon the Fe–O–Fe angle is also analyzed theoretically.