2,459 research outputs found
State-dependent Energy Allocation in Cod (Gadus Morhua)
Growth and maturation are processes that are tuned to the external environment an individual is likely to experience, where food availability, the mortality regime, and events necessary to complete the life cycle are of special importance. Understanding what influences life history strategies and how changes in life history in turn influence population dynamics and ecological interactions are crucial to our understanding of marine ecology and contemporary anthropogenic induced change. We present a state-dependent model that optimises life-long energy allocation in iteroparous fish. Energy can be allocated to growth or reproduction, and depends in the individuals age, body length, stored energy, and the state of the environment. Allocation and the physiological processes of growth, storing energy, and reproduction are modelled mechanistically. The model is parameterised for Atlantic cod (Gadus morhua); more specifically for the Northeast Arctic cod stock. Growth and maturation predicted by the model fit well with field observations, and based on a further investigation of cod reproduction in the model we conclude that the model has the ability to recapture complex life history phenomena, e.g. indeterminate growth and skipped spawning, and therefore provides an important tool that can improve our understanding of life history strategies in fish
Bering - The first deep space mission to map asteroidal diversity, origin and transportation
Asteroids are remnants of the material from which the Solar System formed.
Fragments of asteroids, in the form of meteorites, include samples of the first
solid matter to form in our Solar System 4.5 mia years ago. Spectroscopic
studies of asteroids show that they, like the meteorites, range from very
primitive objects to highly evolved small Earth-like planets that
differentiated into core mantle and crust. The asteroid belt displays
systematic variations in abundance of asteroid types from the more evolved
types in the inner belt to the more primitive objects in the outer reaches of
the belt thus bridging the gap between the inner evolved apart of the Solar
System and the outer primitive part of the Solar System. High-speed collisions
between asteroids are gradually resulting in their break-up. The size
distribution of kilometer-sized asteroids implies that the presently
un-detected population of sub-kilometer asteroids far outnumber the known
larger objects. Sub-kilometer asteroids are expected to provide unique insight
into the evolution of the asteroid belt and to the meteorite-asteroid
connection. We propose a space mission to detect and characterize sub-kilometer
asteroids between Jupiter and Venus. The mission is named Bering after the
famous navigator and explorer Vitus Bering. A key feature of the mission is an
advanced payload package, providing full on board autonomy of both object
detection and tracking, which is required in order to study fast moving objects
in deep space. The autonomy has the added advantage of reducing the cost of
running the mission to a minimum, thus enabling science to focus on the main
objectives.Comment: 6 pages, 8 figures, Recent Advances in Space Technologies, IEEE
proceedings XX, in pres
Report of CE on Semantic DS
The Semantic DS allows describing the world depicted by the AV content and interpreting that world, i.e., the “about” of the AV content or depicted narrative reality, which sometimes is imaginary. This document reports on the core experiment on the Semantic DS [6]. The CE originally started at the Maui meeting in December 1999 [3]. Progress reports of the CE were provided at the Geneva meeting [1] and at the Beijing meeting [2]. In Beijing, some components of the Semantic DS were promoted to the XM: Semantic DS, Object DS, PersonObject DS, Event DS, State DS, MediaOccurrence DS, SemanticTime DS, SemanticLocation DS, UsageLabel D, and some semantic relations. The main tasks of this core experiment have been the following: 1) To refine the specification of the Semantic DS by solving identified issues; 2) To define the Conceptual DSs; 3) To recommend the standardization of more semantic relations; 4) To investigate the use of membership functions to describe the strength of relations; 5) To generate simple and complex semantic descriptions of multimedia material; 6) To implement a retrieval and browsing application/s that uses the generated descriptions and that shows the functionality of the UsageLabel D, the Conceptual DSs, the State DS, and membership functions for relations, especially; 7) To recommend changes and additions to the Semantic DS based on the results of the experiment. The retrieval application that the CE has accomplished two objectives: (1) to show the utility of the components of the Semantic DS in a retrieval scenario, and (2) to be the software for the MPEG-7 XM platform
Ethics/Aesthetics
This is the editorial of Autumn 2012 issue of JoLA-Journal of Landscape Architecture. Aesthetics are rearely explicitly addressed in conjunction with ethics in the body of literature examining recent landscape architectural research. The article addresses the relationship between ethics and aesthetics
Report of CE on Semantic DS
This document reports on the core experiment on the Semantic DS [5]. The Semantic DS allows describing the world depicted by the AV content and interpreting that world, i.e., the “about” of the AV content or depicted narrative reality, which sometimes is imaginary. The CE originally started at the Maui meeting in December 1999 [4]. Progress reports of the CE were provided at the Geneva meeting [1], at the Beijing meeting [3], and at the La Baule meeting [2]. In La Baule, some components of the Semantic DS were promoted to the WD - Semantic DS, SemanticBase DS, Object DS, Event DS, AgentObject DS, SemanticPlace DS, SemanticTime DS, MediaOccurrence DS, and semantic relations-, and others were promoted to the XM – SemanticState DS, Concept DS, and AbstractionLevel datatype. The goal of this CE is to continue the refinement and evaluation of the Semantic DS and to continue the evaluation of the use of membership functions to describe relation strength. The AbstractionLevel datatype was promoted to CD before Pisa. At Pisa, the work to update the specification of the the SemanticTime, SemanticPlace, and Event DSs and to explain the methods for abstraction and the use of abstract concepts was started. The main tasks of this core experiment have been the following: 1. To refine the specification of the Semantic DS by solving open issues identified by reviewers and previous CEs; 2. To recommend the standardization of more semantic relations; 3. To continue the investigation of the use of membership functions to describe the strength of relations; 4. To generate simple and complex semantic descriptions of multimedia material, 5. To continue the implementation of a retrieval and browsing application/s that use/s the generated descriptions and that show/s the functionality of the DSs in the MDS XM, and 6. To recommend changes and additions to the Semantic DS based on the results of the experiment. The retrieval application that the CE continued the development of the software that had already been integrated into the XM for the Semantic DS
Report of CE on Semantic DS
ISO/IEC JTC1/SC29/WG11, MPEG00/M6355, 53rd meeting, Jul. 2000, Beijing, PR
Semantics of Multimedia in MPEG-7
In this paper, we present the tools standardized by MPEG-7 for describing the semantics of multimedia. In particular, we focus on the abstraction model, entities, attributes and relations of MPEG-7 semantic descriptions. MPEG-7 tools can describe the semantics of specific instances of multimedia such as one image or one video segment but can also generalize these descriptions either to multiple instances of multimedia or to a set of semantic descriptions. The key components of MPEG-7 semantic descriptions are semantic entities such as objects and events, attributes of these entities such as labels and properties, and, finally, relations of these entities such as an object being the patient of an event. The descriptive power and usability of these tools has been demonstrated in numerous experiments and applications, these make them key candidates to enable intelligent applications that deal with multimedia at human levels
Migration routes of the Chestnut-mandibled Toucan
This is where the abstract of this record would appear. This is only demonstration data
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