580 research outputs found
A simple and efficient face detection algorithm for video database applications
The objective of this work is to provide a simple and yet efficient tool to detect human faces in video sequences. This information can be very useful for many applications such as video indexing and video browsing. In particular the paper focuses on the significant improvements made to our face detection algorithm presented by Albiol, Bouman and Delp (see IEEE Int. Conference on Image Processing, Kobe, Japan, 1999). Specifically, a novel approach to retrieve skin-like homogeneous regions is presented, which is later used to retrieve face images. Good results have been obtained for a large variety of video sequences.Peer ReviewedPostprint (published version
Estimation of automobile-driver describing function from highway tests using the double steering wheel
The automobile-driver describing function for lateral position control was estimated for three subjects from frequency response analysis of straight road test results. The measurement procedure employed an instrumented full size sedan with known steering response characteristics, and equipped with a lateral lane position measuring device based on video detection of white stripe lane markings. Forcing functions were inserted through a servo driven double steering wheel coupling the driver to the steering system proper. Random appearing, Gaussian, and transient time functions were used. The quasi-linear models fitted to the random appearing input frequency response characterized the driver as compensating for lateral position error in a proportional, derivative, and integral manner. Similar parameters were fitted to the Gabor transformed frequency response of the driver to transient functions. A fourth term corresponding to response to lateral acceleration was determined by matching the time response histories of the model to the experimental results. The time histories show evidence of pulse-like nonlinear behavior during extended response to step transients which appear as high frequency remnant power
Water conservation planning: How a systems approach to irrigation promotes sustainable water use
The NRCS focuses on helping individual landowners implement conservation practices across the landscape and in targeted locations. By providing technical and financial assistance, NRCS in Arkansas is helping people help the land and move toward water sustainability in agriculture
Unmanned Multiple Exploratory Probe System (MEPS) for Mars observation. Volume 2: Calculations and derivations
This volume of the final report on the unmanned Multiple Exploratory Probe System (MEPS) details all calculations, derivations, and computer programs that support the information presented in the first volume
Unmanned Multiple Exploratory Probe System (MEPS) for Mars observation. Volume 1: Trade analysis and design
This report presents the unmanned Multiple Exploratory Probe Systems (MEPS), a space vehicle designed to observe the planet Mars in preparation for manned missions. The options considered for each major element are presented as a trade analysis, and the final vehicle design is defined
Association between cognitive restraint, uncontrolled eating, emotional eating and BMI and the amount of food wasted in early adolescent girls.
Understanding of behavioral factors associated with obesity is of
importance in addressing this issue. This study examined the association
between cognitive restraint, uncontrolled eating, emotional eating and
body mass index (BMI) and amount of food plated, consumed, leftovers,
and leftover food thrown into the trash (food wasted) in early
adolescent girls nine to 13 years in O'ahu, Hawai'i (n = 93). Food
plated, consumed, leftovers, and food wasted were estimated using a
three-day mobile food record™ (mFR). Weight and height were measured to
compute BMI (kg/m 2). The three-factor eating questionnaire provided a
score from 0 to 100 for cognitive restraint, uncontrolled eating, and
emotional eating. Higher scores are indicative of greater cognitive
restraint, uncontrolled eating, and emotional eating. Pearson's
correlations were computed to examine the relationship between three
factor eating scores and BMI. General linear models were conducted to
examine the effect of each of three-factor eating scores on food plated,
consumed, leftovers, and food wasted. Cognitive restraint was
positively correlated with BMI (r = 0.36, p < 0.001) and with BMI
z-score (r = 0.40, p < 0.001). There were no associations between
three-factor eating scores and food plated, consumed, leftovers, and
food wasted at lunch. However, at dinner, total energy plated, left
over, and food wasted increased by 4.24 kcal/day (p = 0.030), 1.67
kcal/day (p = 0.002), and 0.93 kcal/day (p = 0.031), respectively, with a
unit increase in uncontrolled eating score. Similarly, total energy
plated and energy left over at dinner increased by 3.40 kcal/day (p =
0.045) and 1.51 kcal/day (p = 0.001), respectively, with a unit increase
in emotional eating score. Additional research should examine the
specific roles of cognitive restraint, uncontrolled eating, emotional
eating and food waste in the development of obesity in adolescents
Characterizing early adolescent food waste using the mobile food record.
This study aimed to assess the amount of plate waste and how plate waste
was disposed by early adolescent girls using a mobile food record
(mFR). Participants were girls nine to thirteen years residing in O’ahu,
Hawai’i (n = 93). Foods selected and leftover were estimated
using a three day mFR. Each leftover food was then classified as thrown
into the trash, fed to a pet, eaten later, or other (e.g., composted).
Repeated measures analyses of variance (ANOVA) were conducted and
Tukey’s post-hoc test were used to adjust for multiple comparisons
between times (breakfast, lunch, dinner, and snack) on leftover food and
leftover food thrown into the trash. The percentage of food leftover
and thrown into the trash was highest at lunch. The percentage of
protein, grain, vegetables, fruit, and dairy leftover at lunch were
unexpectedly low compared to previous studies. The median for percentage
of food thrown into the trash at lunch was <5% for all food groups,
and was consistently low across the day (<10%). Average energy intake
was 436 kcal (±216) at lunch, and 80% of caregivers reported total
household income as ≥$70,000. Studies in real-time using technology over
full days may better quantify plate waste among adolescents
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