568 research outputs found
Henri Temianka Correspondence; (granat)
No full textThis collection contains material pertaining to the life, career, and activities of Henri Temianka, violin virtuoso, conductor, music teacher, and author. Materials include correspondence, concert programs and flyers, music scores, photographs, and books.https://digitalcommons.chapman.edu/temianka_correspondence/3535/thumbnail.jp
Granat, M., Sepúlveda, L. y Garza, J. (Coords.) (2012) Comunicación. Convergencia digital y medios de comunicación. Monterrey: Universidad Autónoma de Nuevo León.
No full textReseña del texto de Granat, M., Sepúlveda, L. y Garza, J. (Coords.) (2012) Comunicación. Convergencia digital y medios de comunicación. Monterrey: Universidad Autónoma de Nuevo León
A machine learning classification model for monitoring the daily physical behaviour of lower-limb amputees
No full textThere are currently limited data on how prosthetic devices are used to support lower-limb prosthesis users in their free-living environment. Possessing the ability to monitor a patient's physical behaviour while using these devices would enhance our understanding of the impact of different prosthetic products. The current approaches for monitoring human physical behaviour use a single thigh or wrist-worn accelerometer, but in a lower-limb amputee population, we have the unique opportunity to embed a device within the prosthesis, eliminating compliance issues. This study aimed to develop a model capable of accurately classifying postures (sitting, standing, stepping, and lying) by using data from a single shank-worn accelerometer. Free-living posture data were collected from 14 anatomically intact participants and one amputee over three days. A thigh worn activity monitor collected labelled posture data, while a shank worn accelerometer collected 3-axis acceleration data. Postures and the corresponding shank accelerations were extracted in window lengths of 5-180 s and used to train several machine learning classifiers which were assessed by using stratified cross-validation. A random forest classifier with a 15 s window length provided the highest classification accuracy of 93% weighted average F-score and between 88 and 98% classification accuracy across all four posture classes, which is the best performance achieved to date with a shank-worn device. The results of this study show that data from a single shank-worn accelerometer with a machine learning classification model can be used to accurately identify postures that make up an individual's daily physical behaviour. This opens up the possibility of embedding an accelerometer-based activity monitor into the shank component of a prosthesis to capture physical behaviour information in both above and below-knee amputees. The models and software used in this study have been made open source in order to overcome the current restrictions of applying activity monitoring methods to lower-limb prosthesis users.</p
GRANAT/SIGMA observation of GRB 920723 soft gamma-ray afterglow
No full textWe present GRANAT/SIGMA observations of the soft gamma-ray afterglow
immediately after the bright GRB 920723. After s, the burst light
curve makes a smooth transition into an afterglow where flux decays as
t-0.7 for at least s. At least of main burst
energy is emitted in the afterglow. The hardness of the afterglow spectrum
corresponds to the power law spectral index , which is
significantly softer than the main burst
Comments on “Validation of an accelerometer-based method to measure the use of manual wheelchairs” by Sonenblum et al. Med Eng Phys 2012; 34(6):781–6
No full textsch_phy[1] Sonenblum SE, Sprigle S, Caspall J, Lopez R. Validation of an accelerometerbased
method to measure the use of manual wheelchairs. Med Eng Phys
2012;34(6):781-6.
[2] Coulter EH, Dall PM, Rochester L, Hasler JP, Granat MH. Development and validation
of a physical activity monitor for use on a wheelchair. Spinal Cord
2011;49:445-50.35pub4550pub
Upper limb activity in myoelectric prosthesis users is biased towards the intact limb and appears unrelated to goal-directed task performance
No full textStudies of the effectiveness of prosthetic hands involve assessing user performance on functional tasks in the lab/clinic, sometimes combined with self-report of real-world use. In this paper we compare real-world upper limb activity between a group of 20 myoelectric prosthesis users and 20 anatomically intact adults. Activity was measured from wrist-worn accelerometers over a 7-day period. The temporal patterns in upper limb activity are presented and the balance of activity between the two limbs quantified. We also evaluated the prosthesis users’ performance on a goal-directed task, characterised using measures including task success rate, completion time, gaze behaviour patterns, and kinematics (e.g. variability and patterns in hand aperture). Prosthesis users were heavily reliant on their intact limb during everyday life, in contrast to anatomically intact adults who demonstrated similar reliance on both upper limbs. There was no significant correlation between the amount of time a prosthesis was worn and reliance on the intact limb, and there was no significant correlation between either of these measures and any of the assessed kinematic and gaze-related measures of performance. We found participants who had been prescribed a prosthesis for longer to demonstrate more symmetry in their overall upper limb activity, although this was not reflected in the symmetry of unilateral limb use. With the exception of previously published case studies, this is the first report of real world upper limb activity in myoelectric prosthesis users and confirms the widely held belief that users are heavily reliant on their intact limb
Waldenström’s Macroglobulinemia in a Normoproteinemic Dog with Atypical Bimorphic Plasmacytoid Differentiation and Monoclonal Gammopathy
No full textA 2-year-old neutered female Small Munsterlander dog was presented for an insect bite.
Physical examination revealed a poor body condition, a peripheral lymphadenomegaly, and suspected
splenomegaly. A complete blood count (Sysmex XN-V) revealed marked leukocytosis with lymphocyto-
sis and abnormal dot plots. An abnormal monomorphic lymphoid population and marked rouleaux
formation were noted on the blood smear. Lymph node aspirates contained an atypical bimorphic
population of lymphocytes, either with a plasmacytoid or a blastic appearance. This double population
was also found in the spleen, liver, bone marrow, tonsils, and other tissues. Peripheral blood and lymph
node clonality assays revealed clonal BCR gene rearrangement. Flow cytometry revealed a mixed
population of small-sized B-cells (CD79a+ CD21+ MHCII+) and medium-sized B-cells (CD79a+ CD21−
MHCII−) in lymph nodes and a dominant population of small-sized mature B-cells (CD21+ MHCII+)
in peripheral blood. Though normoproteinemic, serum protein electrophoresis revealed an increased
α2-globulin fraction with an atypical restricted peak, identified as monoclonal IgM by immunofixa-
tion. Urine protein immunofixation revealed a Bence-Jones proteinuria. A diagnosis of Waldenström’s
macroglobulinemia was made. Chemotherapy was initiated, but the dog was euthanized 12 months
after the initial presentation due to marked clinical degradation
Objective measurement of habitual sedentary behavior in pre-school children: comparison of activPAL with actigraph monitors
No full textThe Actigraph is well established for measurement of both physical activity and
sedentary behavior in children. The activPAL is being used increasingly in children, though with no published evidence on its use in free-living children to date. The present study compared the two monitors in preschool children. Children (n 23) wore both monitors simultaneously during waking hours for 5.6d and 10h/d. Daily mean percentage of time sedentary (nontranslocation of the trunk) was 74.6 (SD 6.8) for the Actigraph and 78.9 (SD 4.3) for activPAL. Daily mean percentage of time physically active (light intensity physical activity plus MVPA) was 25.4 (SD 6.8) for the Actigraph and 21.1 (SD 4.3) for the activPAL. Bland-Altman tests and paired t tests suggested small but statistically significant differences between the two monitors. Actigraph and activPAL estimates of sedentary behaviour and physical activity in young children are similar at a group level
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