Cornie Scheffer
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View article: Estimation of Respiratory Rate From Photoplethysmographic Imaging Videos Compared to Pulse Oximetry
Estimation of Respiratory Rate From Photoplethysmographic Imaging Videos Compared to Pulse Oximetry Open
We present a study evaluating two respiratory rate estimation algorithms using videos obtained from placing a finger on the camera lens of a mobile phone. The two algorithms, based on Smart Fusion and empirical mode decomposition (EMD), co…
View article: Usability and Feasibility of PIERS on the Move: An mHealth App for Pre-Eclampsia Triage
Usability and Feasibility of PIERS on the Move: An mHealth App for Pre-Eclampsia Triage Open
By including target end-users in the design and evaluation of PotM, we have developed an app that can be easily integrated into health care settings in low- and middle-income countries. Usability problems were often related to mobile phone…
View article: MICROSTRUCTURE AND MECHANICAL PROPERTIES OF DIRECT METAL LASER SINTERED TI-6AL-4V
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF DIRECT METAL LASER SINTERED TI-6AL-4V Open
CITATION: Becker, T. H., Beck, M. & Scheffer, C. 2015. Microstructure and mechanical properties of direct metal laser sintered TI-6AL-4V. South African Journal of Industrial Engineering, 26(1):1-10, doi:10.7166/26-1-1022.
View article: Respiratory rate assessment from photoplethysmographic imaging
Respiratory rate assessment from photoplethysmographic imaging Open
We present a study investigating the suitability of a respiratory rate estimation algorithm applied to photoplethysmographic imaging on a mobile phone. The algorithm consists of a cascade of previously developed signal processing methods t…
View article: Sharing Vital Signs between mobile phone applications
Sharing Vital Signs between mobile phone applications Open
We propose a communication library, ShareVitalSigns, for the standardized exchange of vital sign information between health applications running on mobile platforms. The library allows an application to request one or multiple vital signs …
View article: Design of an interactive medical guideline application for community health workers
Design of an interactive medical guideline application for community health workers Open
Clinical guidelines, such as the Integrated Management of Childhood Illness (IMCI), are used worldwide to support community health workers in the assessment of severely ill children. These guidelines are distributed in paper form, complica…
View article: Application of an artificial neural network and morphing techniques in the redesign of dysplastic trochlea
Application of an artificial neural network and morphing techniques in the redesign of dysplastic trochlea Open
Segmentation and computer assisted design tools have the potential to test the validity of simulated surgical procedures, e.g., trochleoplasty. A repeatable measurement method for three dimensional femur models that enables quantification …
View article: <i>In vitro</i> measurement of tibiofemoral kinematics after patient-specific unicompartmental knee replacement
<i>In vitro</i> measurement of tibiofemoral kinematics after patient-specific unicompartmental knee replacement Open
It is suggested that unicompartmental knee replacement (UKR) offers the potential to restore normal knee kinematics better than total knee replacement (TKR) because of retaining the cruciate ligaments, and better preservation of the overal…
View article: Comparison of Experimental Chest Compression Data to a Theoretical Model for the Mechanics of Constant Peak Displacement Cardiopulmonary Resuscitation
Comparison of Experimental Chest Compression Data to a Theoretical Model for the Mechanics of Constant Peak Displacement Cardiopulmonary Resuscitation Open
Good quantitative agreement between the experimental data and the theoretical model suggests that the constant peak displacement CPR model provides reasonable prediction of CC mechanics during CPR over a wide range of CC rates. Conflicts i…
View article: New perspectives in ocular surface disorders. An integrated approach for diagnosis and management
New perspectives in ocular surface disorders. An integrated approach for diagnosis and management Open
The cornea, conjuctiva and the limbus comprise the tissues at the ocular surface. All of them are covered by stratified, squamous, non-keratinizing epithelium and a stable tear film. The ocular surface health is ensured by intimate relatio…