35 research outputs found
Localizing Moments in Long Video Via Multimodal Guidance
The recent introduction of the large-scale, long-form MAD and Ego4D datasets
has enabled researchers to investigate the performance of current
state-of-the-art methods for video grounding in the long-form setup, with
interesting findings: current grounding methods alone fail at tackling this
challenging task and setup due to their inability to process long video
sequences. In this paper, we propose a method for improving the performance of
natural language grounding in long videos by identifying and pruning out
non-describable windows. We design a guided grounding framework consisting of a
Guidance Model and a base grounding model. The Guidance Model emphasizes
describable windows, while the base grounding model analyzes short temporal
windows to determine which segments accurately match a given language query. We
offer two designs for the Guidance Model: Query-Agnostic and Query-Dependent,
which balance efficiency and accuracy. Experiments demonstrate that our
proposed method outperforms state-of-the-art models by 4.1% in MAD and 4.52% in
Ego4D (NLQ), respectively. Code, data and MAD's audio features necessary to
reproduce our experiments are available at:
https://github.com/waybarrios/guidance-based-video-grounding
Differential effects of acute and chronic treatment with the flavonoid chrysin on anxiety-like behavior and Fos immunoreactivity in the lateral septal nucleus in rats
The aim of this study was to compare the effects of acute (a single injection) and chronic (21 consecutive days) treatments with chrysin 2, 4, and 8 umol kgâ1 on anxiety-like behavior and Fos immunoreactivity in the lateral septum nucleus (LSN), a structure that is involved in the regulation of anxiety, in male Wistar rats. These effects were compared with the clinically effective anxiolytic diazepam 7 umol kgâ1. The results showed that acute, but not chronic treatment, with 4 umol kg-1 chrysin exerted anxiolytic- and antidepressant-like effects, andwith these effects were being similar to that of diazepam. Also, none of the above above-mentioned treatments did alter Fos immunoreactivity in the LSN, but a tendency towards athe reduction of this variable was detected with chrysin 4 umol kgâ1 and diazepam 7 umol kgâ1. Altogether, results suggest that chrysin exerts anxiolytic-like effects, but however, it can produce pharmacological tolerance after repeated use, similar to benzodiazepines
Seroprevalence of Trypanosoma cruzi and Leishmania mexicana in FreeâRanging Howler Monkeys in Southeastern M exico
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94679/1/ajp22094.pd
Effect of surgical experience and spine subspecialty on the reliability of the {AO} Spine Upper Cervical Injury Classification System
OBJECTIVE
The objective of this paper was to determine the interobserver reliability and intraobserver reproducibility of the AO Spine Upper Cervical Injury Classification System based on surgeon experience (< 5 years, 5â10 years, 10â20 years, and > 20 years) and surgical subspecialty (orthopedic spine surgery, neurosurgery, and "other" surgery).
METHODS
A total of 11,601 assessments of upper cervical spine injuries were evaluated based on the AO Spine Upper Cervical Injury Classification System. Reliability and reproducibility scores were obtained twice, with a 3-week time interval. Descriptive statistics were utilized to examine the percentage of accurately classified injuries, and Pearsonâs chi-square or Fisherâs exact test was used to screen for potentially relevant differences between study participants. Kappa coefficients (Îș) determined the interobserver reliability and intraobserver reproducibility.
RESULTS
The intraobserver reproducibility was substantial for surgeon experience level (< 5 years: 0.74 vs 5â10 years: 0.69 vs 10â20 years: 0.69 vs > 20 years: 0.70) and surgical subspecialty (orthopedic spine: 0.71 vs neurosurgery: 0.69 vs other: 0.68). Furthermore, the interobserver reliability was substantial for all surgical experience groups on assessment 1 (< 5 years: 0.67 vs 5â10 years: 0.62 vs 10â20 years: 0.61 vs > 20 years: 0.62), and only surgeons with > 20 years of experience did not have substantial reliability on assessment 2 (< 5 years: 0.62 vs 5â10 years: 0.61 vs 10â20 years: 0.61 vs > 20 years: 0.59). Orthopedic spine surgeons and neurosurgeons had substantial intraobserver reproducibility on both assessment 1 (0.64 vs 0.63) and assessment 2 (0.62 vs 0.63), while other surgeons had moderate reliability on assessment 1 (0.43) and fair reliability on assessment 2 (0.36).
CONCLUSIONS
The international reliability and reproducibility scores for the AO Spine Upper Cervical Injury Classification System demonstrated substantial intraobserver reproducibility and interobserver reliability regardless of surgical experience and spine subspecialty. These results support the global application of this classification system