17 research outputs found
Movement Optimization of Robotic Arms for Energy and Time Reduction using Evolutionary Algorithms
Trajectory optimization of a robot manipulator consists of both optimization
of the robot movement as well as optimization of the robot end-effector path.
This paper aims to find optimum movement parameters including movement type,
speed, and acceleration to minimize robot energy. Trajectory optimization by
minimizing the energy would increase the longevity of robotic manipulators. We
utilized the particle swarm optimization method to find the movement parameters
leading to minimum energy consumption. The effectiveness of the proposed method
is demonstrated on different trajectories. Experimental results show that 49%
efficiency was obtained using a UR5 robotic arm
A Novel Model for Driver Lane Change Prediction in Cooperative Adaptive Cruise Control Systems
Accurate lane change prediction can reduce potential accidents and contribute
to higher road safety. Adaptive cruise control (ACC), lane departure avoidance
(LDA), and lane keeping assistance (LKA) are some conventional modules in
advanced driver assistance systems (ADAS). Thanks to vehicle-to-vehicle
communication (V2V), vehicles can share traffic information with surrounding
vehicles, enabling cooperative adaptive cruise control (CACC). While ACC relies
on the vehicle's sensors to obtain the position and velocity of the leading
vehicle, CACC also has access to the acceleration of multiple vehicles through
V2V communication. This paper compares the type of information (position,
velocity, acceleration) and the number of surrounding vehicles for driver lane
change prediction. We trained an LSTM (Long Short-Term Memory) on the HighD
dataset to predict lane change intention. Results indicate a significant
improvement in accuracy with an increase in the number of surrounding vehicles
and the information received from them. Specifically, the proposed model can
predict the ego vehicle lane change with 59.15% and 92.43% accuracy in ACC and
CACC scenarios, respectively
Pheochromocytoma-induced reverse tako-tsubo with rapid recovery of left ventricular function
Pheochromocytoma is a rare, catecholamine-secreting tumor of neuroendocrine cells. It has
been documented to present atypically as myocardial ischemia, arrhythmias, or congestive
heart failure. We present the case of a patient who had transient cardiomyopathy with hypokinesia
of the basal portions of the left ventricle and hyperkinesia of the apex triggered by
a pheochromocytoma crisis similar to that of tako-tsubo cardiomyopathy, but with an inverse
left ventricular contractile pattern (‘inverted tako-tsubo’). (Cardiol J 2012; 19, 5: 527-531
Usability and security of gaze-based graphical grid passwords
We present and analyze several gaze-based graphical password schemes based on recall and cued-recall of grid points; eye-trackers are used to record user's gazes, which can prevent shoulder-surfing and may be suitable for users with disabilities. Our 22-subject study observes that success rate and entry time for the grid-based schemes we consider are comparable to other gaze-based graphical password schemes. We propose the first password security metrics suitable for analysis of graphical grid passwords and provide an in-depth security analysis of user-generated passwords from our study, observing that, on several metrics, user-generated graphical grid passwords are substantially weaker than uniformly random passwords, despite our attempts at designing schemes to improve quality of user-generated passwords
Prevalence of Asthma in Children of Chemical Warfare Victims
Objective: Exposure of DNA to sulfur mustard gas may increase the
inheritance of asthma in chemical warfare victims' (CWV) offspring. The
objective of this study was to determine the prevalence of asthma in
children of CWV and compare it to asthmatic children in the general
population. Methods: Four hundred and nine children from 130 CWV
fathers and 440 children from 145 asthmatic parents from two cities in
Iran participated in this study. The prevalence of asthma was
determined by standard questionnaire released for epidemiological
survey of asthma in children and compared between two groups. Findings:
The prevalence of asthma in the CWV group was 15%; this was not
significantly different from the control group (12.5%). The children of
the CWV group reported a significantly greater incidence of wheezing
(1.2±3.1 attacks) per year, but the control group reported more
severe attacks leading to speech difficulties (3%) and coughing (7%).
Regression analysis showed that with increasing family size in the
control group, the number of subjects suffering from asthmatic symptoms
decreases significantly (r=0.86, P=0.001). Conclusion: Chemical agents
may increase the prevalence of asthma in the offspring of CWV
Aerobic oxidation of cyclohexene catalyzed by NiO/MCM-41 nanocomposites in the gas phase
The effects of whole milk compared to skim milk and apple juice consumption in breakfast on appetite and energy intake in obese children: a three-way randomized crossover clinical trial
Abstract Background A limited number of studies have examined the effect of dairy on satiety and short-term energy intake among children; furthermore we are not aware of any study comparing high and low-fat dairy products regarding their effect on appetite and short-term energy intake. Our objective was to assess the effect skim milk (SM) compared to whole milk (WM) and apple juice (AJ) on satiety and energy intake at lunch among 10–12 y children with obesity. Methods Fifty children with obesity who aged 10–12 y were randomized to consume a fixed content breakfast with 240 ml of SM, AJ, or WM for two consecutive days. The study was a three-way randomized crossover study; therefore each participant served as his/her own control. The total appetite, hunger, fullness, desire to eat and prospective consumption were measured using a visual analogue scale (VAS) before breakfast and every one hour after breakfast until a freely consumed lunch. VAS scores and energy intakes were compared using repeated measures procedure. Results Forty-eight participants (24 girls and 24 boys) completed the study. The energy intake was not different between SM, AJ and WM periods (adjusted mean ± standard error (SE) of energy intake: SM = 831.27 ± 30.64 Kcal, AJ = 794.92 ± 28.72 Kcal, WM = 798.87 ± 24.09 Kcal; P = 0.56). The effect was the same for either gender. Children reported higher satiety score 4 h after drinking WM with breakfast compared with SM (P < 0.05). The same association was found only in girls. Furthermore, SM significantly reduced appetite compared to AJ, 2 h after preloads in girls (P < 0.05). Conclusions Full-fat milk may have favorable effects on satiety but not energy intake in subsequent meal compared to skim milk among the children with obesity. Future studies with longer follow-up periods are needed to confirm these results. Trial registration The study protocol was registered with the Iranian registry of clinical trials on 9th October 2016 (registration ID: IRCT2016072012571N5)