1,721,049 research outputs found
The impact of cultural practices on the outcome of IT risk management implementation
No full textPurpose: The objectives of this research are two-fold. The first is to explore, describe and explain the relevance of the concept of Information Technology risk management (ITRM) implementation processes. In this regard, we were required to understand the interaction between contextual issues, the ITRM framework itself, IT individual interpretations toward them and their effect on implementation. The second objective is to develop a theoretical model for use in guiding the design and analysis of the proposed empirical work. The study introduces a fresh perspective to an established research area. It is argued that without more emphasis on the dynamic nature of the implementation process, an incomplete understanding of the problem will result. Design/methodology/approach: The study adopts an interpretive methodology to a multiple case study design gathering and analysing qualitative evidence. A series of three case studies was designed around 22 semi-structured in-depth interviews conducted to investigate IT individuals’ role in facilitating a successful ITRM implementation. Findings: The findings provide new insights in relation to ITRM implementation by considering IT individual culture. The research develops a substantive theory involving a schematic model involving a set of theoretical propositions. These findings suggest a dynamic approach to implementing IT risk management framework — one that considers the interaction over time of intentions, context, process and action around risk management frameworks. Research limitations/implications: This study makes important theoretical contributions to the understanding of organizational implementations by taking a dynamic view of implementation, identifying different individual IT culture archetypes, emphasizing the role of social aspects and developing a set of key factors and contextual conditions. Practical implications: This model offers managers an understanding of how IT individual culture and the factors and contextual conditional work together over time to ensure a successful ITRM implementation. Meanwhile, it sheds some light on how managers treat IT individuals with different levels of experience differently. Originality/value: We theorize IT individual culture and the factors and contextual conditional and show their effects on ITRM implementation success, thus making an essential contribution to the information systems and implementation research and practice. Moreover, we provide a novel methodology to conceptualize ITRM implementation as a cultural process through which IT people socially construct the meanings and purposes of their work activities. This research answers scholars’ call to construct more accurate explanations of innovation outcomes in an increasingly IS implementation world
3D Human Pose Estimation Using Möbius Graph Convolutional Networks
No full text3D human pose estimation is fundamental to understanding human behavior. Recently, promising results have been achieved by graph convolutional networks (GCNs), which achieve state-of-the-art performance and provide rather light-weight architectures. However, a major limitation of GCNs is their inability to encode all the transformations between joints explicitly. To address this issue, we propose a novel spectral GCN using the Möbius transformation (Möbius-GCN). In particular, this allows us to directly and explicitly encode the transformation between joints, resulting in a significantly more compact representation.
Compared to even the lightest architectures so far, our novel approach requires 90–98% fewer parameters, i.e. our lightest MöbiusGCN uses only 0.042M trainable parameters. Besides the drastic parameter reduction, explicitly encoding the transformation of joints also enables us to achieve state-of-the-art results. We evaluate our approach on the two challenging pose estimation benchmarks, Human3.6M and MPI-INF-3DHP, demonstrating both state-of-the-art results and the generalization capabilities of MöbiusGCN
An exploration of radiological signs in post-intervention liver complications
Full text link: The advent and progression of radiological techniques in the past few decades have revolutionized the diagnostic and therapeutic landscape for liver diseases. These minimally invasive interventions, ranging from biopsies to complex therapeutic procedures like transjugular intrahepatic portosystemic shunt placement and transarterial embolization, offer substantial benefits for the treatment of patients with liver diseases. They provide accurate tissue diagnosis, allow real-time visualization, and render targeted treatment for hepatic lesions with enhanced precision. Despite their advantages, these procedures are not without risks, with the potential for complications that can significantly impact patient outcomes. It is imperative for radiologists to recognize the signs of these complications promptly to mitigate further health deterioration. Ultrasound, CT, and MRI are widely utilized examinations for monitoring the complications. This article presents an overarching review of the most commonly encountered hepatobiliary complications post-radiological interventions, emphasizing their imaging characteristics to improve patient post-procedure management
Performance evaluation of a novel nano-enhanced phase change material for thermal energy storage applications
No full textGround source heat pump systems (GSHP) are one of the sustainable energy resources that provide heating and cooling to buildings. A stable ground temperature has a key role in the performance of the GSHP, in which the overuse (extract/release) of the underground energy can destabilize the ground temperature, leading to the system's failure. A GSHP's performance can be improved by stabilizing the ground temperature, which can be achieved by adding thermal energy storage (TES) to the system. This study aims to present a potential solution to improve the thermal performance of the GSHPs by coupling them to a latent heat TES system. PCMs are widely used for latent heat TES application; however, their poor thermophysical properties are a drawback, so adding nanoparticles has been considered as one of the solutions to address this drawback and improve PCM's properties. This study investigated the thermal performance of a nano-enhanced phase change material (NE-PCM) as an underground TES by developing a finite element numerical model and validation of the experimental apparatus. To this end, PDA@hBN/MXene as a thermal enhancer has been used to develop the NE-PCM. Then, the NE-PCM was utilized in a storage tank with a diameter of 30 cm and a height of 60 cm. The experimental apparatus consists of 8 NE-PCM pipes and four borehole heat exchangers. The experimental temperature of the NE-PCM pipes was used to validate the numerical model for heating and cooling the system within 0.3 °C and 0.2 °C, respectively. Then, the numerical model was used to study the potential of the proposed TES in three scenarios, including no PCM, base PCM, and NE-PCM, with both parallel- and serial-connected heat exchangers. The total heat transfer with NE-PCM was increased by 38.4 % compared to no PCM case and 24.6 % compared to the base PCM. Lastly, the results of three different flow rates showed up to 11.5 % enhancement of the thermal storage efficiency by increasing the flow rates. The results show the potential of using the new NE-PCM in GSHP applications, adding the NE-PCM as the thermal storage medium can improve the performance of the hybrid TES-GSHP system
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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