A hand biometric authentication method based on measurements of the user's hand geometry and vascular pattern is proposed. To acquire the hand geometry, the thickness of the side view of the hand, the K-curvature with a hand-shaped chain code, the lengths and angles of the finger valleys, and the lengths and profiles of the fingers were used, and for the vascular pattern, the direction-based vascular-pattern extraction method was used, and thus, a new multimodal biometric approach is proposed. The proposed multimodal biometric system uses only one image to extract the feature points. This system can be configured for low-cost devices. Our multimodal biometric-approach hand-geometry (the side view of the hand and the back of hand) and vascular-pattern recognition method performs at the score level. The results of our study showed that the equal error rate of the proposed system was 0.06%.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3658721 | PMC |
http://dx.doi.org/10.3390/s130302895 | DOI Listing |
J Shoulder Elbow Surg
December 2024
Department of Mechanical Engineering, Western University, London, ON, Canada; The Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada; Department of Surgery, Western University, London, ON, Canada. Electronic address:
Introduction: Stress shielding remains a concern following total shoulder arthroplasty using press-fit short humeral stems. While the effect of alterations in implant geometry, positioning, and sizing on stress shielding have been investigated, the effects of coverage of the cortical boundary of the resection plane have not yet been fully explored. The purpose of this study was to quantify the effect of improved cortical coverage using elliptical vs.
View Article and Find Full Text PDFSci Rep
December 2024
Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Gdansk, 80-233, Poland.
Recent years have witnessed a tremendous popularity growth of optimization methods in high-frequency electronics, including microwave design. With the increasing complexity of passive microwave components, meticulous tuning of their geometry parameters has become imperative to fulfill demands imposed by the diverse application areas. More and more often, achieving the best possible performance requires global optimization.
View Article and Find Full Text PDFJ Synchrotron Radiat
January 2025
Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.
We present here a newly developed software tool (called PGMweb) for computing and simulating the X-ray beam path through a plane grating monochromator (PGM), a key component in soft X-ray beamlines at modern synchrotron and free-electron laser facilities. A historical overview of the development of PGMs is presented, with special attention dedicated to the collimated PGM optical scheme found at several X-ray facilities worldwide. The analytical expressions that fully describe the geometry of a PGM are derived and have been implemented as functions in a Python library (pyplanemono).
View Article and Find Full Text PDFIndian J Dermatol
October 2024
Department of Burns and Plastic Surgery and Hypospadias and VVFs Clinic, Postgraduate Institute of Medical Sciences (PGIMS), University of Health Sciences, Rohtak (UHSR), Haryana, India.
Purpose And Background: To create awareness among dermatosurgeons about the versatility of keystone flaps in re-surfacing post-excisional small, medium and large skin defects.
Aims And Objectives: Single-staged tension-free re-surfacing of various sized skin defects using keystone flap and to have least donor site morbidity, primary healing and maximum functional outcome.
Material And Methods: This retrospective study was conducted, between October 2021 - January 2023 in Department of Plastic Surgery, PGIMS Rohtak, on 15 males and 1 female aged between 18 - 65 years.
J Environ Manage
December 2024
University of Palermo, , Department of Engineering, Palermo, 90128, Italy. Electronic address:
Sedimentation tanks represent one of the most important components of any water and wastewater treatment plants. The lack of knowledge of hydraulics in sedimentation tank leads to unnecessary capital and operating costs as well as water pollution in the form of excessive sludge. Improper and inadequate design cause overloading of filters, and lead to frequent backwashing, which in turn waste a significant percentage of treated water.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!