110 research outputs found
Contribution to Quality of Life: A New Outcome Variable for Mobile Data Service
The rapid spread of technological innovations like mobile data services (MDS) has made mobile computing a fact of everyday life for many people. Therefore, we need to understand the contribution of mobile computing to overall quality of life (QoL). Employing the satisfaction hierarchy model and bottom-up spillover theory, this study proposes a theoretical model in the context of MDS that connects user satisfaction (a traditional outcome variable of IT) with contribution to QoL (a new outcome variable for mobile computing) in a range of life domains. The validity of the proposed model and outcome variable was tested through three empirical studies conducted in Korea. User satisfaction with MDS was found to affect the contribution of MDS to QoL in eleven life domains, and these contributions in turn influenced the overall contribution of MDS to QoL. The paper ends with a discussion of the study\u27s implications and limitations
Tooth Instance Segmentation from Cone-Beam CT Images through Point-based Detection and Gaussian Disentanglement
Individual tooth segmentation and identification from cone-beam computed
tomography images are preoperative prerequisites for orthodontic treatments.
Instance segmentation methods using convolutional neural networks have
demonstrated ground-breaking results on individual tooth segmentation tasks,
and are used in various medical imaging applications. While point-based
detection networks achieve superior results on dental images, it is still a
challenging task to distinguish adjacent teeth because of their similar
topologies and proximate nature. In this study, we propose a point-based tooth
localization network that effectively disentangles each individual tooth based
on a Gaussian disentanglement objective function. The proposed network first
performs heatmap regression accompanied by box regression for all the
anatomical teeth. A novel Gaussian disentanglement penalty is employed by
minimizing the sum of the pixel-wise multiplication of the heatmaps for all
adjacent teeth pairs. Subsequently, individual tooth segmentation is performed
by converting a pixel-wise labeling task to a distance map regression task to
minimize false positives in adjacent regions of the teeth. Experimental results
demonstrate that the proposed algorithm outperforms state-of-the-art approaches
by increasing the average precision of detection by 9.1%, which results in a
high performance in terms of individual tooth segmentation. The primary
significance of the proposed method is two-fold: 1) the introduction of a
point-based tooth detection framework that does not require additional
classification and 2) the design of a novel loss function that effectively
separates Gaussian distributions based on heatmap responses in the point-based
detection framework.Comment: 11 pages, 7 figure
Hasseiki dainō shin hishitsu no saihyōsō dewa kōfunsei shinkei saibō to yokuseisei shinkei saibō ga ikkasei no kurasutā o keiseisuru
Hasseiki dainō shin hishitsu no saihyōsō dewa kōfunsei shinkei saibō to yokuseisei shinkei saibō ga ikkasei no kurasutā o keiseisuru
Hasseiki dainō shin hishitsu no saihyōsō dewa kōfunsei shinkei saibō to yokuseisei shinkei saibō ga ikkasei no kurasutā o keiseisuru
Contributing to Quality of Life: A New Outcome Variable for Information Technology in Ubiquitous Computing Environments
The rapid spread of technological innovations like mobile data services (MDS) has made ubiquitous computing a fact of everyday life for many people. We need therefore to understand the contribution of ubiquitous computing to overall quality of life. This study proposes a theoretical model that connects user satisfaction (a traditional outcome variable of IT) with contributions to quality of life (a new outcome variable for ubiquitous computing) in the domain of MDS. The reliability of the outcome variables and the validity of the proposed model were tested through three empirical studies in Korea. Study results indicate that user satisfaction with MDS affected the contribution of MDS to quality of life in eleven subordinate domains, and these contributions in turn influenced the overall contribution of MDS to quality of life. The paper ends with a discussion of the implications and limitations of the study results
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