546,480 research outputs found
Spatial-then-Temporal Self-Supervised Learning for Video Correspondence
Learning temporal correspondence from unlabeled videos is of vital importance
in computer vision, and has been tackled by different kinds of self-supervised
pretext tasks. For the self-supervised learning, recent studies suggest using
large-scale video datasets despite the training cost. We propose a
spatial-then-temporal pretext task to address the training data cost problem.
The task consists of two steps. First, we use contrastive learning from
unlabeled still image data to obtain appearance-sensitive features. Then we
switch to unlabeled video data and learn motion-sensitive features by
reconstructing frames. In the second step, we propose a global correlation
distillation loss to retain the appearance sensitivity learned in the first
step, as well as a local correlation distillation loss in a pyramid structure
to combat temporal discontinuity. Experimental results demonstrate that our
method surpasses the state-of-the-art self-supervised methods on a series of
correspondence-based tasks. The conducted ablation studies verify the
effectiveness of the proposed two-step task and loss functions
Evaluation of the Welsh School-based Counselling Strategy : Final Report
The Welsh Government's School-based Counselling Strategy (the Strategy), implemented from April 2008 in secondary schools across Wales and a pilot selection of primary schools, was evaluated. A range of research tools were used, including desk research, analysis of client outcomes, qualitative interviews and surveys of key stakeholders' views. Implementation of the Strategy and its counselling services was generally perceived as successful by all stakeholders, including counselling clients, with evidence that all key recommendations for its development were implemented. Across six terms, 11,043 episodes of counselling were attended. Participation in counselling was associated with large reductions in psychological distress; with levels of improvement that, on average, were somewhat greater than those found in previous evaluations of UK school-based counselling. Key recommendations are that permanent funding mechanisms should be established to embed counselling in the Welsh secondary school sector, with consideration given to its roll-out into primary schools. Service managers and schools should also look to ensuring equal opportunities of participation in school-based counselling from all sectors of the community, that adequate accommodation is available in schools for the delivery of counselling, and that a system of regular outcome monitoring is established
A Gender Perspective on Water Resources and Sanitation
In most cultures, women are primarily responsible for the use and management of water resources, sanitation, and health at the household level. Women and girls walk many hours fetching and carrying back water whereas men do not
Collecting Data from Children Ages 9-13
Provides a summary of literature on common methods used to collect data, such as diaries, interviews, observational methods, and surveys. Analyzes age group-specific considerations, advantages, and drawbacks, with tips for improving data quality
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