The Experts below are selected from a list of 15624 Experts worldwide ranked by ideXlab platform
Allan J Hamilton - One of the best experts on this subject based on the ideXlab platform.
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further comparison of 4 display modes for a multi resolution foveated laparoscope
Surgical Innovation, 2020Co-Authors: Sangyoon Lee, Hong Hua, Mike Nguyen, Allan J HamiltonAbstract:Background. To overcome field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope (MRFL), which can simultaneously obtain both wide- and zoomed-in-view images. To facilitate the effectiveness of our MRFL, we have been investigating various ways of organizing and visualizing dual-view multi-resolution images acquired by the MRFL. In our prior study, we implemented and compared 6 display modes for the MRFL, assuming a typical clinical environment where a standard (but limited) resolution monitor is available. To take full advantage of our MRFL, displays having sufficient screen resolutions might be advantageous. The present study aims to further understand the effects of view configurations through displays with a standard high-definition (HD) resolution and a 4K resolution. In this study, we compare 3 display modes for limited-resolution displays against a new mode for sufficient-resolution displays. Methods. Twenty subjects performed 3 evaluation trials of a touching task with each display mode in an emulated MRFL environment. Various objective measurements including task completion time and the number of collisions, and Subjective Preference were recorded. Results. The new mode showed a better task completion time than the other modes, while it maintained a low number of collisions similar to the others. Moreover, the majority of participants selected the new mode as their most preferred one. Conclusions. With a sufficient display resolution, the co-registration between the unblocked and unwarped wide context view and the high-resolution zoomed-in view offered by the new mode was highly effective on both task performance and user Preference.
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comparison of six display modes for a multi resolution foveated laparoscope
Surgical Endoscopy and Other Interventional Techniques, 2019Co-Authors: Sangyoon Lee, Hong Hua, Mike Nguyen, Allan J HamiltonAbstract:Background To overcome the field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope that can simultaneously obtain both wide- and zoomed-in-view images through a single scope. To facilitate the effective access to the dual views of images with different resolution and field coverage acquired by our laparoscope, six different display modes have been developed. Each of the six display modes has inherent advantages and disadvantages. This study compares the six display modes through a human-subject experiment, which was conducted with an emulated laparoscope using a 4K camera. Methods Twenty-four subjects without medicine background performed three evaluation trials of a touching task with each of the display modes. Various objective measurements including task completion time, the number of collisions, gaze position, and tooltip position, and Subjective Preference for the display modes were recorded. Results For all the measurements except for task completion time and moving speed of tooltip, there were statistically significant differences among the display modes. Although the focus plus warped context view mode was selected as one of the least preferred modes, it showed the best task performance. Conclusions The unblocked wide context view was useful to provide a situational awareness even when it was severely distorted in some of the display modes, and information continuity played an important role in improving task performance. Moreover, the position change of viewing window coupled to the location of region of interest helped improve task performance, by providing an additional cue for spatial awareness.
Chunqiao Tan - One of the best experts on this subject based on the ideXlab platform.
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Interval-Valued Intuitionistic Fuzzy Multicriteria Group Decision Making Based on VIKOR and Choquet Integral
2020Co-Authors: Chunqiao Tan, Xiaohong ChenAbstract:An effective decision making approach based on VIKOR and Choquet integral is developed to solve multicriteria group decision making problem with conflicting criteria and interdependent Subjective Preference of decision makers in a fuzzy environment where Preferences of decision makers with respect to criteria are represented by interval-valued intuitionistic fuzzy sets. First, an intervalvalued intuitionistic fuzzy Choquet integral operator is given. Some of its properties are investigated in detail. The extended VIKOR decision procedure based on the proposed operator is developed for solving the multicriteria group decision making problem where the interactive criteria weight is measured by Shapley value. An illustrative example is given for demonstrating the applicability of the proposed decision procedure for solving the multi-criteria group decision making problem in interval-valued intuitionistic fuzzy environment
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group decision making with linguistic Preference relations with application to supplier selection
Expert Systems With Applications, 2011Co-Authors: Chunqiao TanAbstract:Linguistic Preference relation is a useful tool for expressing Preferences of decision makers in group decision making according to linguistic scales. But in the real decision problems, there usually exist interactive phenomena among the Preference of decision makers, which makes it difficult to aggregate Preference information by conventional additive aggregation operators. Thus, to approximate the human Subjective Preference evaluation process, it would be more suitable to apply non-additive measures tool without assuming additivity and independence. In this paper, based on @l-fuzzy measure, we consider dependence among Subjective Preference of decision makers to develop some new linguistic aggregation operators such as linguistic ordered geometric averaging operator and extended linguistic Choquet integral operator to aggregate the multiplicative linguistic Preference relations and additive linguistic Preference relations, respectively. Further, the procedure and algorithm of group decision making based on these new linguistic aggregation operators and linguistic Preference relations are given. Finally, a supplier selection example is provided to illustrate the developed approaches.
Yuanyuan Shi - One of the best experts on this subject based on the ideXlab platform.
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developing dynamic intuitionistic normal fuzzy aggregation operators for multi attribute decision making with time sequence Preference
Expert Systems With Applications, 2017Co-Authors: Zaoli Yang, Lucheng Huang, Yuanyuan ShiAbstract:Decision-making based on dynamic intuitionistic normal fuzzy aggregation operators and time sequence Preference.A time-sequence weight calculation in line with time sequence Preference is introduced.Two novel dynamic intuitionistic normal fuzzy aggregation operators are proposed.Giving the final decision-making result in accordance with the VIKOR method. In allusion to dynamic intuitionistic normal fuzzy multi-attribute decision-making (MADM) problems with unknown time weight, a MADM method based on dynamic intuitionistic normal fuzzy aggregation (DINFA) operators and VIKOR method with time sequence Preference was presented. In this method, two information aggregating operators were first proposed and proved, including dynamic intuitionistic normal fuzzy weighted arithmetic average (DINFWAA) operator and dynamic intuitionistic normal fuzzy weighted geometric average (DINFWGA) operator. Meanwhile, we constructed a multi-target nonlinear programming model, which fused time degree theory that was based on Subjective Preference and information entropy principle based on objective Preference, to obtain time weight. Based on which, according to the algorithm of intuitionistic normal fuzzy number, intuitionistic normal fuzzy information under different time sequences were aggregated by using the proposed DINFA operators, and formed a dynamic intuitionistic normal fuzzy comprehensive decision-making matrix; then, obtained the optimal solution that was the closest to ideal solution via VIKOR method. Finally, the feasibility and significance of the presented method over existing methods were verified via analysis of numerical examples.
Sangyoon Lee - One of the best experts on this subject based on the ideXlab platform.
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further comparison of 4 display modes for a multi resolution foveated laparoscope
Surgical Innovation, 2020Co-Authors: Sangyoon Lee, Hong Hua, Mike Nguyen, Allan J HamiltonAbstract:Background. To overcome field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope (MRFL), which can simultaneously obtain both wide- and zoomed-in-view images. To facilitate the effectiveness of our MRFL, we have been investigating various ways of organizing and visualizing dual-view multi-resolution images acquired by the MRFL. In our prior study, we implemented and compared 6 display modes for the MRFL, assuming a typical clinical environment where a standard (but limited) resolution monitor is available. To take full advantage of our MRFL, displays having sufficient screen resolutions might be advantageous. The present study aims to further understand the effects of view configurations through displays with a standard high-definition (HD) resolution and a 4K resolution. In this study, we compare 3 display modes for limited-resolution displays against a new mode for sufficient-resolution displays. Methods. Twenty subjects performed 3 evaluation trials of a touching task with each display mode in an emulated MRFL environment. Various objective measurements including task completion time and the number of collisions, and Subjective Preference were recorded. Results. The new mode showed a better task completion time than the other modes, while it maintained a low number of collisions similar to the others. Moreover, the majority of participants selected the new mode as their most preferred one. Conclusions. With a sufficient display resolution, the co-registration between the unblocked and unwarped wide context view and the high-resolution zoomed-in view offered by the new mode was highly effective on both task performance and user Preference.
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comparison of six display modes for a multi resolution foveated laparoscope
Surgical Endoscopy and Other Interventional Techniques, 2019Co-Authors: Sangyoon Lee, Hong Hua, Mike Nguyen, Allan J HamiltonAbstract:Background To overcome the field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope that can simultaneously obtain both wide- and zoomed-in-view images through a single scope. To facilitate the effective access to the dual views of images with different resolution and field coverage acquired by our laparoscope, six different display modes have been developed. Each of the six display modes has inherent advantages and disadvantages. This study compares the six display modes through a human-subject experiment, which was conducted with an emulated laparoscope using a 4K camera. Methods Twenty-four subjects without medicine background performed three evaluation trials of a touching task with each of the display modes. Various objective measurements including task completion time, the number of collisions, gaze position, and tooltip position, and Subjective Preference for the display modes were recorded. Results For all the measurements except for task completion time and moving speed of tooltip, there were statistically significant differences among the display modes. Although the focus plus warped context view mode was selected as one of the least preferred modes, it showed the best task performance. Conclusions The unblocked wide context view was useful to provide a situational awareness even when it was severely distorted in some of the display modes, and information continuity played an important role in improving task performance. Moreover, the position change of viewing window coupled to the location of region of interest helped improve task performance, by providing an additional cue for spatial awareness.
Hong Hua - One of the best experts on this subject based on the ideXlab platform.
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further comparison of 4 display modes for a multi resolution foveated laparoscope
Surgical Innovation, 2020Co-Authors: Sangyoon Lee, Hong Hua, Mike Nguyen, Allan J HamiltonAbstract:Background. To overcome field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope (MRFL), which can simultaneously obtain both wide- and zoomed-in-view images. To facilitate the effectiveness of our MRFL, we have been investigating various ways of organizing and visualizing dual-view multi-resolution images acquired by the MRFL. In our prior study, we implemented and compared 6 display modes for the MRFL, assuming a typical clinical environment where a standard (but limited) resolution monitor is available. To take full advantage of our MRFL, displays having sufficient screen resolutions might be advantageous. The present study aims to further understand the effects of view configurations through displays with a standard high-definition (HD) resolution and a 4K resolution. In this study, we compare 3 display modes for limited-resolution displays against a new mode for sufficient-resolution displays. Methods. Twenty subjects performed 3 evaluation trials of a touching task with each display mode in an emulated MRFL environment. Various objective measurements including task completion time and the number of collisions, and Subjective Preference were recorded. Results. The new mode showed a better task completion time than the other modes, while it maintained a low number of collisions similar to the others. Moreover, the majority of participants selected the new mode as their most preferred one. Conclusions. With a sufficient display resolution, the co-registration between the unblocked and unwarped wide context view and the high-resolution zoomed-in view offered by the new mode was highly effective on both task performance and user Preference.
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comparison of six display modes for a multi resolution foveated laparoscope
Surgical Endoscopy and Other Interventional Techniques, 2019Co-Authors: Sangyoon Lee, Hong Hua, Mike Nguyen, Allan J HamiltonAbstract:Background To overcome the field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope that can simultaneously obtain both wide- and zoomed-in-view images through a single scope. To facilitate the effective access to the dual views of images with different resolution and field coverage acquired by our laparoscope, six different display modes have been developed. Each of the six display modes has inherent advantages and disadvantages. This study compares the six display modes through a human-subject experiment, which was conducted with an emulated laparoscope using a 4K camera. Methods Twenty-four subjects without medicine background performed three evaluation trials of a touching task with each of the display modes. Various objective measurements including task completion time, the number of collisions, gaze position, and tooltip position, and Subjective Preference for the display modes were recorded. Results For all the measurements except for task completion time and moving speed of tooltip, there were statistically significant differences among the display modes. Although the focus plus warped context view mode was selected as one of the least preferred modes, it showed the best task performance. Conclusions The unblocked wide context view was useful to provide a situational awareness even when it was severely distorted in some of the display modes, and information continuity played an important role in improving task performance. Moreover, the position change of viewing window coupled to the location of region of interest helped improve task performance, by providing an additional cue for spatial awareness.
