Gesture recognition through angle space

As the notion of ubiquitous computing becomes a reality, the keyboard and mouse paradigm become less satisfactory as an input modality. The ability to interpret gestures can open another dimension in the user interface technology. In this paper, we present a novel approach for dynamic hand gesture modeling using neural networks. The results show high accuracy in detecting single and multiple gestures, which makes this a promising approach for gesture recognition from continuous input with undetermined boundaries. This method is independent of the input device and can be applied as a general back-end processor for gesture recognition systems

A formal model of emotional-response, inspired from human cognition and emotion systems

In this paper, we used the formalisms of decision-making theory and theories in psychology, physiology and cognition to proposing a macro model of human emotional-response. We believe that using such formalism can fill the gap between psychology, cognitive science and AI, and can be useful in the design of human-like agents. This model can be used in a wide variety of applications such as artificial agents, user interface, and intelligent tutoring systems. Using the proposed model, we can provide for human behaviors like mood, personality and biological response in machines. This capability will enable such systems, to adapt their responses and behaviors. In situations where there are multiple ways for performing an action, this model can help with the decision making process

A study of the stress wave factor technique for nondestructive evaluation of composite materials

The acousto-ultrasonic method of nondestructive evaluation is an extremely sensitive means of assessing material response. Efforts continue to complete the understanding of this method. In order to achieve the full sensitivity of the technique, extreme care must be taken in its performance. This report provides an update of the efforts to advance the understanding of this method and to increase its application to the nondestructive evaluation of composite materials. Included are descriptions of a novel optical system that is capable of measuring in-plane and out-of-plane displacements, an IBM PC-based data acquisition system, an extensive data analysis software package, the azimuthal variation of acousto-ultrasonic behavior in graphite/epoxy laminates, and preliminary examination of processing variation in graphite-aluminum tubes

The effects of arm movement on reaction time in patients with latent and active upper trapezius myofascial trigger point

Background: Myofascial pain syndrome is a significant source of mechanical pain. The aim of this study was to investigate the effects of arm movement on reaction time in females with latent and active upper trapezius myofascial trigger point. Methods: In this interventional study, a convenience sample of fifteen women with one active MTP, fifteen women with one latent MTP in the upper trapezius, and fifteen normal healthy women were participated. Participants were asked to stand for 10 seconds in an erect standing position. Muscle reaction times were recorded including anterior deltoid (AD), cervical paraspinal (CP) lumbar paraspinal (LP), both of upper trapezius (UT), sternocleidomastoid (SCM) and medial head of gastrocnemius (GcM). Participants were asked to flex their arms in response to a sound stimulus preceded by a warning sound stimulus. Data were analyzed using one-way ANOVA Test. Results: There was significant differences in motor time and reaction time between active and control groups (p<0.05) except for GcM. There was no significant difference in motor time between active and passive groups except for UT without MTP and SCM (p<0.05). Also, there were no significant differences in motor times between latent MTP and control groups. Furthermore, there was no significant difference in premotor times between the three groups. Conclusion: The present study shows that patients with active MTP need more time to react to stimulus, but patients with latent MTP are similar to healthy subjects in the reaction time. Patients with active MTP had less compatibility with environmental stimulations, and they responded to a specific stimulation with variability in Surface Electromyography (SEMG)

Comparison of cervical repositioning error in individuals with forward head posture with and without neck pain

Background and purpose: Proprioception is one of the somatic senses which is used by the nervous system for muscular control. Inappropriate posture or pain could result in impaired proprioception. One of these poor postures is forward head posture (FHP). The aim of this study was to investigate cervical repositioning error in FHP subjects with and without neck pain and normal individuals. Materials and methods: A case-control study was conducted consisting of people who had FHP without neck pain (n=31), individuals with FHP and neck pain (n=31), and healthy subjects (n=31). Cervical total range of motion (ROM) and then repositioning error in target angle (50 of full ROM in each movement(of flexion, extension, right and left lateral flexion, and right and left rotation were measured by cervical range of motion (CROM) device. Pain intensity was measured using the visual analog scale (VAS). Results: Cervical ROM in FHP subjects was significantly less than that of healthy subjects in most movement directions. The absolute repositioning error of the target angle in FHP subjects was found to be significantly more than that of healthy subjects in most movement directions (p<0.05). The mean VAS score in patients with neck pain was 4±0.68. Conclusion: FHP whether with or without pain may increase the cervical repositioning error. But presence of pain do not leads to higher rates of error. © 2016, Mazandaran University of Medical Sciences. All rights reserved

Circadian rhythms and sleep regulation in seasonal affective disorder

Seasonal affective disorder (SAD) is characterised by recurrent episodes in autumn and winter of depression, hypersomnia, augmented appetite with carbohydrate craving, and weight gain, and can be successfully treated with bright light. Circadian rhythm hypotheses (summarized in) have stimulated research into the pathophysiology of SAD, postulating that: 1.The illness is a consequence of delayed phase position, 2.It is correlated with diminished circadian amplitude, or 3.It results from changes in the nocturnal duration between dusk and dawn e.g. of low core body temperature or melatonin secretion. Light is considered to act directly on the circadian pacemaker (‘Process C') and not on sleep dependent processes (‘Process S'). Thus successful treatment of SAD must act via mechanisms within known retinohypothalamic pathways. Conversely, emergence of SAD symptoms may reflect inappropriate neurobiological response to decreasing daylengt

Effects of craniosacral therapy and sensorimotor training on pain, disability, depression and quality of life of patients with nonspecific chronic low back pain: a randomized clinical trial

Background: Craniosacral therapy (CST) and sensorimotor training (SMT) are two recommended interventions for nonspecific chronic low back pain (NCLBP). This study compares the effects of CST and SMT on pain, functional disability, depression and quality of life in patients with NCLBP. Methodology: A total of 31 patients with NCLBP were randomly assigned to the CST group (n=16) and SMT (n=15). The study patients received 10 sessions of interventions during 5 weeks. Visual analogue scale (VAS), Oswestry disability index (ODI), Beck depression inventory-II (BDI-II), and Short Form-36 (SF-36) questionnaires were used at baseline (before the treatment), after the treatment, and 2 months after the last intervention session. Results were compared and analyzed statistically. Results: Both groups showed significant improvement from baseline to after treatment (p < 0.05). In the CST group, this improvement continued during the follow-up period in all outcomes (p < 0.05), except role emotional domain of SF-36. In the SMT group, VAS, ODI and BDI-II increased during follow-up. Also, all domains of SF-36 decreased over this period. Results of group analysis indicate a significant difference between groups at the end of treatment phase (p < 0.05), except social functioning. Conclusions: Results of our research confirm that 10 sessions of craniosacral therapy (CST) or sensorimotor training (SMT) can significantly control pain, disability, depression, and quality of life in patients with NCLBP; but the efficacy of CST is significantly better than SMT. © 2021 Faculty of Anaesthesia, Pain and Intensive Care, AFMS. All rights reserved

Utilization of a novel digital measurement tool for quantitative assessment of upper extremity motor dexterity: a controlled pilot study.

BackgroundThe current methods of assessing motor function rely primarily on the clinician's judgment of the patient's physical examination and the patient's self-administered surveys. Recently, computerized handgrip tools have been designed as an objective method to quantify upper-extremity motor function. This pilot study explores the use of the MediSens handgrip as a potential clinical tool for objectively assessing the motor function of the hand.MethodsEleven patients with cervical spondylotic myelopathy (CSM) were followed for three months. Eighteen age-matched healthy participants were followed for two months. The neuromotor function and the patient-perceived motor function of these patients were assessed with the MediSens device and the Oswestry Disability Index respectively. The MediSens device utilized a target tracking test to investigate the neuromotor capacity of the participants. The mean absolute error (MAE) between the target curve and the curve tracing achieved by the participants was used as the assessment metric. The patients' adjusted MediSens MAE scores were then compared to the controls. The CSM patients were further classified as either "functional" or "nonfunctional" in order to validate the system's responsiveness. Finally, the correlation between the MediSens MAE score and the ODI score was investigated.ResultsThe control participants had lower MediSens MAE scores of 8.09%±1.60%, while the cervical spinal disorder patients had greater MediSens MAE scores of 11.24%±6.29%. Following surgery, the functional CSM patients had an average MediSens MAE score of 7.13%±1.60%, while the nonfunctional CSM patients had an average score of 12.41%±6.32%. The MediSens MAE and the ODI scores showed a statistically significant correlation (r=-0.341, p&lt;1.14×10⁻⁵). A Bland-Altman plot was then used to validate the agreement between the two scores. Furthermore, the percentage improvement of the the two scores after receiving the surgical intervention showed a significant correlation (r=-0.723, p&lt;0.04).ConclusionsThe MediSens handgrip device is capable of identifying patients with impaired motor function of the hand. The MediSens handgrip scores correlate with the ODI scores and may serve as an objective alternative for assessing motor function of the hand