The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform
Thomas Reinhard - One of the best experts on this subject based on the ideXlab platform.
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Vertical Scrolling axis of corneal endothelial grafts for descemet membrane endothelial keratoplasty
Cornea, 2020Co-Authors: Katrin Wacker, Marianne Fritz, Viviane Grewing, Philip Maier, Thomas ReinhardAbstract:PURPOSE Heterogeneity in Scrolling behavior of Descemet membrane endothelial keratoplasty (DMEK) grafts complicates DMEK surgery. This prospective observational study assessed Scrolling axes of DMEK grafts relative to the donor's eye. METHODS The eye bank randomly marked the rim of corneoscleral donor buttons during trephination and recorded the position relative to the donor's axis. Surgeons were masked to the absolute position of the eye bank marking and recorded the Scrolling axis relative to the eye bank marking and DMEK upside-down orientation. The Scrolling axis was categorized as Vertical (0 to 30 degrees and 150 to 180 degrees), oblique (>30 to 60 degrees and 120 to 60 to <120 degrees). Scrolling patterns of corneas from the same donor were assessed. RESULTS Scrolling patterns of 202 donor corneas from 149 donors were determined. The donor graft scrolled predominantly Vertically to the donor's cornea [75%; 95% confidence interval (CI), 68%-80%]. Horizontal axes (11%) and oblique axes (14%) were less common. The median deviation in Scrolling axes after unfolding the grafts was 0 degrees from the original Scrolling axis (interquartile range, 0-15), indicating that Scrolling axes were stable. Fellow eyes of 46 donors had 3.55 times higher odds of a nonVertical Scrolling pattern if the first eye had a nonVertical Scrolling pattern (95% CI, 1.37-9.20), suggesting that donor factors influencing both eyes could contribute to Scrolling patterns. CONCLUSIONS DMEK grafts have a natural and stable Scrolling tendency at Vertical axis of donor's cornea. Anticipating Scrolling axes might help improve preparation techniques for DMEK grafts and outcomes.
Nasir Memon - One of the best experts on this subject based on the ideXlab platform.
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An HMM-based behavior modeling approach for continuous mobile authentication
2014 IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), 2014Co-Authors: Tzipora Halevi, Nasir MemonAbstract:This paper studies continuous authentication for touch interface based mobile devices. A Hidden Markov Model (HMM) based behavioral template training approach is presented, which does not require training data from other subjects other than the owner of the mobile. The stroke patterns of a user are modeled using a continuous left-right HMM. The approach models the horizontal and Vertical Scrolling patterns of a user since these are the basic and mostly used interactions on a mobile device. The effectiveness of the proposed method is evaluated through extensive experiments using the Toucha-lytics database which comprises of touch data over time. The results show that the performance of the proposed approach is better than the state-of-the-art method.
H. Chi - One of the best experts on this subject based on the ideXlab platform.
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Swipe Vs. Scroll: Web Page Switching on Mobile Browsers
2015Co-Authors: Andrew Warr, H. ChiAbstract:Tabbed web browsing interfaces enable users to multi-task and easily switch between open web pages. However, tabbed browsing is difficult for mobile web browsers due to the limited screen space and the reduced precision of touch. We present an experiment comparing Safari’s pages-based switching interface using horizontal swiping gestures with the stacked cards-based switching interface using Vertical Scrolling gestures, introduced by Chrome. The results of our experiment show that cards-based switching interface allows for faster switching and is less frustrating, with no significant effect on error rates. We generalize these findings, and provide design implications for mobile information spaces
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Swipe Vs. Scroll: Web Page Switching on Mobile Browsers
2013Co-Authors: Andrew Warr, H. ChiAbstract:Tabbed web browsing interfaces enable users to multi-task and easily switch between open web pages. However, tabbed browsing is difficult for mobile web browsers due to the limited screen space and the reduced precision of touch. We present an experiment comparing Safari’s pages-based switching interface using horizontal swiping gestures with the stacked cards-based switching interface using Vertical Scrolling gestures, introduced by Chrome. The results of our experiment show that cards-based switching interface allows for faster switching and is less frustrating, with no significant effect on error rates. We generalize these findings, and provide design implications for mobile information spaces. Author Keywords Web browser; Web browser interfaces; Information spaces
Katrin Wacker - One of the best experts on this subject based on the ideXlab platform.
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Vertical Scrolling axis of corneal endothelial grafts for descemet membrane endothelial keratoplasty
Cornea, 2020Co-Authors: Katrin Wacker, Marianne Fritz, Viviane Grewing, Philip Maier, Thomas ReinhardAbstract:PURPOSE Heterogeneity in Scrolling behavior of Descemet membrane endothelial keratoplasty (DMEK) grafts complicates DMEK surgery. This prospective observational study assessed Scrolling axes of DMEK grafts relative to the donor's eye. METHODS The eye bank randomly marked the rim of corneoscleral donor buttons during trephination and recorded the position relative to the donor's axis. Surgeons were masked to the absolute position of the eye bank marking and recorded the Scrolling axis relative to the eye bank marking and DMEK upside-down orientation. The Scrolling axis was categorized as Vertical (0 to 30 degrees and 150 to 180 degrees), oblique (>30 to 60 degrees and 120 to 60 to <120 degrees). Scrolling patterns of corneas from the same donor were assessed. RESULTS Scrolling patterns of 202 donor corneas from 149 donors were determined. The donor graft scrolled predominantly Vertically to the donor's cornea [75%; 95% confidence interval (CI), 68%-80%]. Horizontal axes (11%) and oblique axes (14%) were less common. The median deviation in Scrolling axes after unfolding the grafts was 0 degrees from the original Scrolling axis (interquartile range, 0-15), indicating that Scrolling axes were stable. Fellow eyes of 46 donors had 3.55 times higher odds of a nonVertical Scrolling pattern if the first eye had a nonVertical Scrolling pattern (95% CI, 1.37-9.20), suggesting that donor factors influencing both eyes could contribute to Scrolling patterns. CONCLUSIONS DMEK grafts have a natural and stable Scrolling tendency at Vertical axis of donor's cornea. Anticipating Scrolling axes might help improve preparation techniques for DMEK grafts and outcomes.
Tzipora Halevi - One of the best experts on this subject based on the ideXlab platform.
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An HMM-based behavior modeling approach for continuous mobile authentication
2014 IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), 2014Co-Authors: Tzipora Halevi, Nasir MemonAbstract:This paper studies continuous authentication for touch interface based mobile devices. A Hidden Markov Model (HMM) based behavioral template training approach is presented, which does not require training data from other subjects other than the owner of the mobile. The stroke patterns of a user are modeled using a continuous left-right HMM. The approach models the horizontal and Vertical Scrolling patterns of a user since these are the basic and mostly used interactions on a mobile device. The effectiveness of the proposed method is evaluated through extensive experiments using the Toucha-lytics database which comprises of touch data over time. The results show that the performance of the proposed approach is better than the state-of-the-art method.
