2 research outputs found
Temporal Recurrent Networks for Online Action Detection
Most work on temporal action detection is formulated as an offline problem,
in which the start and end times of actions are determined after the entire
video is fully observed. However, important real-time applications including
surveillance and driver assistance systems require identifying actions as soon
as each video frame arrives, based only on current and historical observations.
In this paper, we propose a novel framework, Temporal Recurrent Network (TRN),
to model greater temporal context of a video frame by simultaneously performing
online action detection and anticipation of the immediate future. At each
moment in time, our approach makes use of both accumulated historical evidence
and predicted future information to better recognize the action that is
currently occurring, and integrates both of these into a unified end-to-end
architecture. We evaluate our approach on two popular online action detection
datasets, HDD and TVSeries, as well as another widely used dataset, THUMOS'14.
The results show that TRN significantly outperforms the state-of-the-art
Practical value of anti-xa activity in the evaluation of extracorporeal circuit anticoagulation during haemodialysis:Results of a cross-sectional single-centre study
\u3cp\u3eBackground/Aims: Anticoagulation of the extracorporeal circuit is essential for adequate haemodialysis (HD). Low molecular weight heparins (LMWHs) are safe and sufficient towards achieving this goal. In the Netherlands, dosage is based on bodyweight and adjusted based on clinical events. LMWH levels during dialysis can be quantified through measurement of the anti-Xa activity and a target range of 0.5-1.0 IU/mL has been proposed. We aimed to evaluate the practical value of the anti-Xa activity to guide LMWH dosage in HD patients. Additionally, the value of the activated partial thromboplastin time (APTT) was investigated. Methods: All prevalent adult HD patients of our dialysis clinic were included. APTT and anti-Xa activity were measured before, during and after 2 dialysis sessions. Clinical and dialysis characteristics, including LMWH dosage, were derived from digital patient charts. Results: Our final study cohort consisted of 83 patients. LMWH dosage during dialysis was appropriate for bodyweight in 61% of cases, of which 50% reached an anti-Xa activity within the putative target range of 0.5-1.0 IU/mL. Forty-six percent of patients had an anti-Xa activity >1.0 IU/mL. Anti-Xa levels during and after dialysis were significantly correlated (r = 0.803, p < 0.01). No thrombotic or haemorrhagic complications were observed in this study. Correlation of APTT with anti-Xa activity was poor. Conclusion: Anti-Xa activity measurements during dialysis can identify patients in whom LMWH dosage should be lowered in a subsequent dialysis session. Whether such an intervention leads to a decrease in haemorrhagic complications needs to be evaluated in prospective studies.\u3c/p\u3