225 research outputs found
A Schedulability Analysis Framework for Real-time Infrastructure Systems Managing Heterogeneous Resources
REACTION 2012. 1st International workshop on Real-time and distributed computing in emerging applications. December 4th, 2012, San Juan, Puerto Rico.Electricity generating systems, such as smart grid
systems, and water management systems are infrastructure
systems that manage resources critical to human life. In the
systems, resources are produced and managed to supply them
to various consumers, such as building, car, factory, and
household, according to their needs and priorities. Reliable
supply of resources depends not only on sufficient production
of resources but also on reliable sharing of resource supply
facilities. This paper presents a schedulability analysis framework.
A prominent characteristic of the framework is that it
considers at once the two types of resources, i.e. consumable
resources, such as electricity, energy, and water, and sharable
resources, such as pipelines, storages, and processors, are
considered. To apply a formal approach to schedulability
analysis of infrastructure system, this paper classifies the types
of resources and real-time jobs for infrastructure systems. Then
based on the classification , it presents an architectural model
and a schedulability analysis framework.This research was supported by the KAIST High Risk High Return Project (HRHRP)
Convergence Circuit Mapping: Genetic Approaches From Structure to Function
Understanding the complex neural circuits that underpin brain function and behavior has been a long-standing goal of neuroscience. Yet this is no small feat considering the interconnectedness of neurons and other cell types, both within and across brain regions. In this review, we describe recent advances in mouse molecular genetic engineering that can be used to integrate information on brain activity and structure at regional, cellular, and subcellular levels. The convergence of structural inputs can be mapped throughout the brain in a cell type-specific manner by antero- and retrograde viral systems expressing various fluorescent proteins and genetic switches. Furthermore, neural activity can be manipulated using opto- and chemo-genetic tools to interrogate the functional significance of this input convergence. Monitoring neuronal activity is obtained with precise spatiotemporal resolution using genetically encoded sensors for calcium changes and specific neurotransmitters. Combining these genetically engineered mapping tools is a compelling approach for unraveling the structural and functional brain architecture of complex behaviors and malfunctioned states of neurological disorders
Knowing Where to Focus: Event-aware Transformer for Video Grounding
Recent DETR-based video grounding models have made the model directly predict
moment timestamps without any hand-crafted components, such as a pre-defined
proposal or non-maximum suppression, by learning moment queries. However, their
input-agnostic moment queries inevitably overlook an intrinsic temporal
structure of a video, providing limited positional information. In this paper,
we formulate an event-aware dynamic moment query to enable the model to take
the input-specific content and positional information of the video into
account. To this end, we present two levels of reasoning: 1) Event reasoning
that captures distinctive event units constituting a given video using a slot
attention mechanism; and 2) moment reasoning that fuses the moment queries with
a given sentence through a gated fusion transformer layer and learns
interactions between the moment queries and video-sentence representations to
predict moment timestamps. Extensive experiments demonstrate the effectiveness
and efficiency of the event-aware dynamic moment queries, outperforming
state-of-the-art approaches on several video grounding benchmarks.Comment: ICCV 2023. Code is available at https://github.com/jinhyunj/EaT
Design and Fabrication of Remote Welding Equipment in a Hot-Cell
The remote welding equipment for nuclear fuel bundle fabrication in a hot-cell was designed and developed. To achieve this, a preliminary investigation of hands-on fuel fabrication outside a hot-cell was conducted with a consideration of the constraints caused by the welding in a hot-cell. Some basic experiments were also carried out to improve the end-plate welding process for nuclear fuel bundle fabrication. The resistance welding equipment using end-plate welding was also improved. It was found that the remote resistance welding was more suitable for joining an end-plate to end caps in a hot-cell. This paper presents an outline of the developed welding equipment for nuclear fuel bundle fabrication and reviews a conceptual design of remote welding equipment using a master-slave manipulator. Furthermore, the mechanical considerations and a mock-up simulation test were described. Finally, its performance test results were presented for a mock-up of the remote resistance welding equipment for nuclear fuel bundle fabrication
Difference in the epidemiologic and clinical characteristics by age groups of the children who visited a hand center emergency department with a hand injury requiring surgery
Purpose We aimed to describe the difference in the epidemiologic and clinical characteristics by age groups of the children with hand injuries requiring surgery who visited the emergency department (ED) of a community hospital that runs a hand center. Methods We reviewed 388 consecutive children with hand injuries requiring surgery, aged < 16 years, who visited the ED from January 2011 through September 2016. Information was obtained regarding age and gender of the children, seasonal and daily distribution of the visits, location, cause, site, and level of the injury, the diagnosis, and presence of serious injury. The children were classified into 3 age groups; toddlers (0 to 3 years), preschoolers (4 to 6 years), and schoolers (7 to 15 years). Severe injury was defined as amputation or crush injury. Results Mean age of the children was 7.4 ± 5.0 years and boys accounted for 65.7%. The most frequent visits occurred during the weekend (53.1%) and in spring (30.7%), and most children visited the ED with injuries that occurred at home and indoors (55.2% and 79.9%, respectively). The most common cause, site, and level of the injury were sharp object (34.8%), fingers other than the thumb and index finger (64.7%), and the distal phalanx (46.7%), respectively. In the toddler group, domestic, indoor, door-related, and distal phalanx injuries were more common than in the schooler group (P < 0.001). Physical contact or sharp object-related injuries increased with increasing age (P < 0.001). Severe injuries were more common among the toddlers than the schoolers (P < 0.001). Conclusion In the toddler group, domestic, indoor, door-related, distal phalanx, and severe injuries were more common than in the schooler group. These characteristics by age groups would aid in preventing hand injury in children, especially toddlers
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