Showing papers by "Alexander Mamishev published in 2012"
TL;DR: In this paper, the authors investigated empirical heat transfer correlations for ESEC chambers with three different geometry types and found that the variation in the enhancement ratio is sensitive to that of the potential and the flow rate.
23 citations
TL;DR: A capacitive sensor that measures interfacial forces in prostheses and is promising for other biomedical applications is presented and can be integrated into prosthetic devices to measure both normal and shear stress simultaneously.
Abstract: This paper presents a capacitive sensor that measures interfacial forces in prostheses and is promising for other biomedical applications. These sensors can be integrated into prosthetic devices to measure both normal and shear stress simultaneously, allowing for the study of prosthetic limb fit, and ultimately for the ability to better adapt prosthetics to individual users. A sensing cell with a 1.0 cm2 spatial resolution and a measurement range of 0–220 kPa of shear and 0–2 MPa of pressure was constructed. The cell was load tested and found to be capable of isolating the applied shear and pressure forces. This paper discusses the construction of the prototype, the mechanical and electrode design, fabrication and characterization. The work presented is aimed at creating a class of adaptive prosthetic interfaces using a capacitive sensor.
22 citations
TL;DR: The DDRS consists of a mobile device that integrates a smartphone and an integrated laser package, an algorithm to process acquired data for food volume estimation, which is the largest source of error in calculating dietary intake, and database and interface for data storage and management.
Abstract: The area of dietary assessment is becoming increasingly important as obesity rates soar, but valid measurement of the
food intake in free-living persons is extraordinarily challenging. Traditional paper-based dietary assessment methods
have limitations due to bias, user burden and cost, and therefore improved methods are needed to address important
hypotheses related to diet and health. In this paper, we will describe the progress of our mobile Diet Data Recorder
System (DDRS), where an electronic device is used for objective measurement on dietary intake in real time and at
moderate cost. The DDRS consists of (1) a mobile device that integrates a smartphone and an integrated laser package,
(2) software on the smartphone for data collection and laser control, (3) an algorithm to process acquired data for food
volume estimation, which is the largest source of error in calculating dietary intake, and (4) database and interface for
data storage and management. The estimated food volume, together with direct entries of food questionnaires and voice
recordings, could provide dietitians and nutritional epidemiologists with more complete food description and more
accurate food portion sizes. In this paper, we will describe the system design of DDRS and initial results of dietary
assessment.
14 citations
TL;DR: In this paper, the optimal heat transfer performance of ESEC chambers with different geometry types was investigated and several practical design issues were discussed, and it was shown that a higher quantity of micronozzles with increased spacing noticeably enhances the transient cooling rate.
14 citations