323,098 research outputs found
PET/CT-guided percutaneous liver mass biopsies and ablations: Targeting accuracy of a single 20 s breath-hold PET acquisition
No full textAim To determine whether a single 20 s breath-hold positron-emission tomography (PET) acquisition obtained during combined PET/computed tomography (CT)-guided percutaneous liver biopsy or ablation procedures has the potential to target 2-[18F]-fluoro-2-deoxy-d-glucose (FDG)-avid liver masses as accurately as up to 180 s breath-hold PET acquisitions. Materials and methods This retrospective study included 10 adult patients with 13 liver masses who underwent FDG PET/CT-guided percutaneous biopsies (n = 5) or ablations (n = 5). PET was acquired as nine sequential 20 s, monitored, same-level breath-hold frames and CT was acquired in one monitored breath-hold. Twenty, 40, 60, and 180 s PET datasets were reconstructed. Two blinded readers marked tumour centres on randomized PET and CT datasets. Three-dimensional spatial localization differences between PET datasets and either 180 s PET or CT were analysed using multiple regression analyses. Statistical tests were two-sided and p < 0.05 was considered significant. Results Targeting differences between 20 s PET and 180 s PET ranged from 0.7-20.3 mm (mean 5.3 ± 4.4 mm; median 4.3) and were not statistically different from 40 or 60 s PET (p = 0.74 and 0.91, respectively). Targeting differences between 20 s PET and CT ranged from 1.4-36 mm (mean 9.6 ± 7.1 mm; median 8.2 mm) and were not statistically different from 40, 60, or 180 s PET (p = 0.84, 0.77, and 0.35, respectively). Conclusion Single 20 s breath-hold PET acquisitions from PET/CT-guided percutaneous liver procedures have the potential to target FDG-avid liver masses with equivalent accuracy to 180 s summed, breath-hold PET acquisitions and may facilitate strategies that improve image registration and shorten procedure times
CSR and leadership approaches and practices: a comparative inquiry of owners and professional executives
No full textThis study generates comparative insights into CSR approaches of owners and non-kin professional executives in an emerging country context, Turkey. Drawing on 61 interviews, we found that ownership status of the executive is crucial in shaping their CSR perceptions and practices. Owner-executives are empowered in pursuing CSR approaches based on their personal preferences and values; they have mostly societal aims. Professionals display tendency for company-related CSR practice; they exhibit greater knowledge of CSR, and their CSR initiatives are the results of strategic choices to enhance their power within the corporation. Our paper contributes to the debate on the drivers for CSR by accounting for both societal and individual influences on the CSR agency of these two key groups of executives. First, we develop a typology of CSR approaches of owners and professionals. Second, we provide insights from an emerging country context. Third, we present empirically grounded practice implications for CSR. <br/
Cerebral vasculitis and obsessive-compulsive disorder following varicella. infection in childhood
No full textYaramis A, Herguner S, Kara B, Tatli B, Tuzun O, Ozmen M. Cerebral vasculitis and obsessive-compulsive disorder following varicella infection in childhood. Turk J Pediatr 2009; 51: 72-75
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Understanding the Agency of Diversity Managers: A Relational and Multilevel Investigation.
No full textPhDThis thesis aims to provide a critical realist account of diversity managers' agency,
incorporating a critique of the existing diversity management research. A multilevel and
relational analytical framework is offered in order to understand diversity managers'
agency. The framework interpreted and operationalised Bourdieu's key concepts,
`field', `habitus', `capitals' and `strategies' in the organisational context, for exploring
and explaining macro, meso and micro level influences on the agency of diversity
managers.
The macro-social field of diversity management is mapped out by analysing data from
an online national survey completed by diversity managers in the UK, and in-depth
interviews with diversity managers of large public and private sector organisations.
Then, findings of an extensive case study of Ford Motor Company, which includes
company documentation and interviews with the company's diversity managers, are
introduced to examine meso-organisational and micro-individual dynamics of diversity
managers' agency.
The analysis of the findings revealed that the agency of diversity managers is
multilayered and complex. Whilst the boundaries of this agency are drawn by the deeply
seated structures and mechanisms which are embedded in the fabric of social and
organisational lives, diversity managers own varying degrees of social, cultural and
symbolic capitals which are potential sources of power and influence, and they utilise
strategies in order to activate this potential and widen the scope of their agency.
The thesis addresses the limitations in diversity management literature, which are
associated with dualisms of agency and structure, and qualitative and quantitative
methods. It makes theoretical and methodological contribution by offering original
empirical evidence generated through a multi-method strategy and analysing diversity
managers' agency at the interplay of agentic and structural dynamics. It also offers
policy makers at organisational and national levels a realistic understanding of diversity
management processes that may inform design of more effective and progressive
policies and initiatives.School of Business and Management Queen Mary University
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No full textCan archives of audiovisual TV interviews be used to make authors more visible to students, and thereby reduce the learning gap between native and non-native language speakers in college classes? We examined students in a college course who learned about one scholar's ideas through watching an audiovisual TV interview (i.e., visible author format) and about another scholar's ideas through reading a formal text description (i.e., invisible author format). For the invisible author, native language speakers scored significantly higher than the non-native language speakers on a corresponding exam question (i.e., a cognitive measure), generated more words on the exam question (i.e., a motivational measure), and mentioned the author's name more often in answering the exam question (i.e., an affective measure). For the visible author, the groups did not differ on any of these measures. These findings provide evidence for the idea that making the author visible through audiovisual TV interviews can eliminate the learning gap between native and non-native language speakers. 3 Universities around the world serve students who are non-native speakers of th
The vanishing author in computer-generated works: a critical analysis of recent Australian case law
No full textAbstract
The use of software is ubiquitous in the creation of many copyright works, yet the requirement in copyright law that every work have a human author who engages in independent intellectual effort means that its use may prevent copyright subsistence. Several recent Australian cases have refocused attention on authorship as an essential criterion of copyright subsistence, and these cases suggest that much computer-produced output may be authorless and thus lack copyright protection. This article, the first in a two-part series, analyses how each case deals with the question of authorship of computer-produced works and why the use of software diminishes copyright protection for a significant number of computer-generated works. The article critiques the application of conventional notions of human authorship developed in the pre-computer age to modern productions and suggests alternative approaches to authorship that satisfy both the major objectives of copyright policy and the need to adapt to the computer age. The article argues that, without a broader judicial approach to authorship of computer-generated works, Parliament must remedy the lacuna in protection for these ‘authorless’ works. Possible solutions for reform are suggested. In a forthcoming article, the author comprehensively examines those reform proposals
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