scholarly journals Modelling Caspian sturgeon population dynamics: a new paradigm and new technology

2006 ◽  
Vol 63 (6) ◽  
pp. 980-994 ◽  
Author(s):  
Robert A. Karayev
Keyword(s):  
Population Dynamics ◽  
Fishery Management ◽  
Cognitive Theory ◽  
New Technology ◽  
Traditional Theory ◽  
New Paradigm ◽  
New Approach ◽  
Knowledge Based ◽  
The Many ◽  
Analytical Tools

Abstract Currently, many problems beset sustainable management of Caspian sturgeon stocks, some outside the traditional theory of fishery management. Successfully solving such problems requires different models of population dynamics, reflecting the phenomenological properties of sturgeon stocks, the consequences of their overexploitation, and issues relating to environmental pressure on the ecosystem in which they live. Of the many analytical tools available to address the various questions, problem-orientated models are few. Their development demands a new approach, a new modelling paradigm, and new modelling tools that meet the modern ideas of ecosystem analysis and cognitive theory. This paper offers one such new paradigm and describes a knowledge-based modelling technique that may provide realization of this paradigm. A problem-orientated version of knowledge-based models is described, the applicability of such models in attempting to solve the practical issues of sturgeon fisheries management is reviewed, and an example of model implementation is given.

Majority Judgment

2011 ◽  
Author(s):  
Michel Balinski ◽  
Rida Laraki
Keyword(s):  
Theory And Practice ◽  
Traditional Theory ◽  
New Paradigm ◽  
National Elections ◽  
Acceptable Solution ◽  
Strategic Manipulation ◽  
Majority Judgment ◽  
Collective Ranking ◽  
The Many ◽  
Traditional Paradigm

This book argues that the traditional theory of social choice offers no acceptable solution to the problems of how to elect, judge, or rank. It finds that the traditional model—transforming the “preference lists” of individuals into a “preference list” of society—is fundamentally flawed in both theory and practice. The authors propose a different model, which leads to a new theory and method: majority judgment. Majority judgment is meaningful, resists strategic manipulation, elicits honesty, and is not subject to the classical paradoxes encountered in practice, notably Condorcet’s paradox and Arrow’s paradox. The authors offer theoretical, practical and experimental evidence—from national elections to figure skating competitions—to support their arguments. Drawing on wine, sports, music, and other competitions, they argue that the question should not be how to transform many individual rankings into a single collective ranking but rather, after defining a common language of grades to measure merit, how to transform the many individual evaluations of each competitor into a single collective evaluation of all competitors. The crux of the matter is a new model in which the traditional paradigm—to compare—is replaced by a new paradigm: to evaluate.

Biotics: Competition, Herbivory, Predation, Parasitism and Symbiosis

2017 ◽  
Author(s):  
Christer Brönmark ◽  
Lars-Anders Hansson
Keyword(s):  
Population Dynamics ◽  
Ecosystem Function ◽  
Theoretical Basis ◽  
Abiotic Factors ◽  
Biological Interactions ◽  
Natural Systems ◽  
The Many

If biological interactions, such as competition and predation, have any effect on population dynamics, or if abiotic factors alone determine which organisms, how many of them do we see in a specific ecosystem, was for long a controversial question. This chapter aims at providing the basis for the understanding of biological interactions, as well as showing ample examples of how important those interactions are in shaping both population dynamics and ecosystem function of natural systems. In addition to the many examples, the reader is introduced to the history and the theoretical basis for biological interactions.

Knowledge-Based System for Estimating Incident Clearance Duration for Maryland I-95

2018 ◽  
Vol 2672 (14) ◽  
pp. 61-72 ◽  
Author(s):  
Minsu Won ◽  
Hyeonmi Kim ◽  
Gang-Len Chang
Keyword(s):  
Preliminary Evaluation ◽  
Incident Response ◽  
Knowledge Based System ◽  
Confidence Levels ◽  
Knowledge Based ◽  
Incident Duration ◽  
Response Team ◽  
Key Variables ◽  
Incident Reports ◽  
The Many

For incident response operations to be appreciated by the general public, it is essential that responsible highway agencies are capable of providing the estimated clearance duration of a detected incident at a level sufficiently reliable for motorists to make proper decisions such as selecting a detour route. Depending on the estimated clearance duration, the incident response center can then implement proper strategies to interact with motorists, ranging from providing incident information only to executing mandatory detouring operations. This study presents a knowledge-based system, based on detailed incident reports collected by the Maryland-CHART (Coordinated Highway Action Response Team) program between years 2012 and 2016, for such needs. The proposed system features the use of interval-based estimates derived from knowledge of historical data, with different confidence levels for each estimated incident clearance duration, and its rule-based structure for convenient updates with new data and available expertise from field operators. As some key variables associated with incident duration often only become available as the clearance operations progress, the developed system with its sequential nature allows users to dynamically revise the estimated duration when additional data have been reported. The preliminary evaluation results have shown the promise of the developed system which, with its invaluable historical information, can circumvent the many data quality and availability issues which have long plagued the applicability of some state-of-the-art models on this subject.

scholarly journals Aggregator of Demand Response for Renewable Integration and Customer Engagement: Strengths, Weaknesses, Opportunities, and Threats

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2391 ◽  
Author(s):  
Kody Ponds ◽  
Ali Arefi ◽  
Ali Sayigh ◽  
Gerard Ledwich
Keyword(s):  
Demand Response ◽  
Electricity Market ◽  
Swot Analysis ◽  
Traditional Approach ◽  
Customer Engagement ◽  
Energy Integration ◽  
New Approach ◽  
Advantages And Disadvantages ◽  
Knowledge Based ◽  
Political Economic

The world is progressing towards a more advanced society where end-consumers have access to local renewable-based generation and advanced forms of information and technology. Hence, it is in a current state of transition between the traditional approach to power generation and distribution, where end-consumers of electricity have typically been inactive in their involvement with energy markets and a new approach that integrates their active participation. This new approach includes the use of distributed energy resources (DER) such as renewable-based generation and demand response (DR), which are being rapidly adopted by end-consumers where incentives are strong. This paper presents the role of the DR aggregator to effectively integrate DER technology as a new source of energy capacity into electricity networks using information communication technology and industry knowledge., Based on DR aggregators, this framework will efficiently facilitate renewable energy integration and customer engagement into the electricity market. To this aim, advantages and disadvantages of DR aggregators are discussed in this paper from political, economic, social, and technological (PEST) points of view. Based on this analysis, a strengths, weaknesses, opportunities, and threats (SWOT) analysis for a typical DR aggregator is presented.

Compressed wavefield extrapolation

Geophysics ◽  
2007 ◽  
Vol 72 (5) ◽  
pp. SM77-SM93 ◽  
Author(s):  
Tim T. Lin ◽  
Felix J. Herrmann
Keyword(s):  
Wave Propagation ◽  
Compressed Sensing ◽  
Signal Recovery ◽  
New Paradigm ◽  
New Approach ◽  
Measurement Basis ◽  
Recent Developments ◽  
Data Volume ◽  
Extrapolation Problem ◽  
Wavefield Extrapolation

An explicit algorithm for the extrapolation of one-way wavefields is proposed that combines recent developments in information theory and theoretical signal processing with the physics of wave propagation. Because of excessive memory requirements, explicit formulations for wave propagation have proven to be a challenge in 3D. By using ideas from compressed sensing, we are able to formulate the (inverse) wavefield extrapolation problem on small subsets of the data volume, thereby reducing the size of the operators. Compressed sensing entails a new paradigm for signal recovery that provides conditions under which signals can be recovered from incomplete samplings by nonlinear recovery methods that promote sparsity of the to-be-recovered signal. According to this theory, signals can be successfully recovered when the measurement basis is incoherent with the representa-tion in which the wavefield is sparse. In this new approach, the eigenfunctions of the Helmholtz operator are recognized as a basis that is incoherent with curvelets that are known to compress seismic wavefields. By casting the wavefield extrapolation problem in this framework, wavefields can be successfully extrapolated in the modal domain, despite evanescent wave modes. The degree to which the wavefield can be recovered depends on the number of missing (evanescent) wavemodes and on the complexity of the wavefield. A proof of principle for the compressed sensing method is given for inverse wavefield extrapolation in 2D, together with a pathway to 3D during which the multiscale and multiangular properties of curvelets, in relation to the Helmholz operator, are exploited. The results show that our method is stable, has reduced dip limitations, and handles evanescent waves in inverse extrapolation.

scholarly journals Molecular Hybridization as a Tool in the Design of Multi-target Directed Drug Candidates for Neurodegenerative Diseases

2020 ◽  
Vol 18 (5) ◽  
pp. 348-407 ◽  
Author(s):  
Vanessa Silva Gontijo ◽  
Flávia P. Dias Viegas ◽  
Cindy Juliet Cristancho Ortiz ◽  
Matheus de Freitas Silva ◽  
Caio Miranda Damasio ◽  
...  
Keyword(s):  
Neurodegenerative Diseases ◽  
Rational Design ◽  
Brain Regions ◽  
Molecular Hybridization ◽  
Drug Candidate ◽  
New Paradigm ◽  
New Approach ◽  
Biological Targets ◽  
Drug Candidates ◽  
Biochemical Pathways

Neurodegenerative Diseases (NDs) are progressive multifactorial neurological pathologies related to neuronal impairment and functional loss from different brain regions. Currently, no effective treatments are available for any NDs, and this lack of efficacy has been attributed to the multitude of interconnected factors involved in their pathophysiology. In the last two decades, a new approach for the rational design of new drug candidates, also called multitarget-directed ligands (MTDLs) strategy, has emerged and has been used in the design and for the development of a variety of hybrid compounds capable to act simultaneously in diverse biological targets. Based on the polypharmacology concept, this new paradigm has been thought as a more secure and effective way for modulating concomitantly two or more biochemical pathways responsible for the onset and progress of NDs, trying to overcome low therapeutical effectiveness. As a complement to our previous review article (Curr. Med. Chem. 2007, 14 (17), 1829-1852. https://doi.org/10.2174/092986707781058805), herein we aimed to cover the period from 2008 to 2019 and highlight the most recent advances of the exploitation of Molecular Hybridization (MH) as a tool in the rational design of innovative multifunctional drug candidate prototypes for the treatment of NDs, specially focused on AD, PD, HD and ALS.

scholarly journals Context Analysis in the Development of Diving Technologies

2019 ◽  
Vol 67 (2) ◽  
pp. 7-58
Author(s):  
Ryszard Kłos
Keyword(s):  
Decision Making ◽  
Continuous Improvement ◽  
Previous Article ◽  
Decision Making Process ◽  
Context Analysis ◽  
New Approach ◽  
Knowledge Based ◽  
Research Cycle ◽  
Level Of Risk

Abstract The previous article described a new approach methodology1 for work on the development of technology for the use of the SCR CRABE SCUBA2 type diving apparatus. However, after its publication numerous questions emerged regarding the genesis of the research undertaken, also from foreign partners using the same rebreather. The work on changing the technology of use was preceded by analyses, which were available only to people involved in the decision-making process. Demonstrating all the details of the decision-making process may be tedious, but failing to present them at all might raise justified doubts about the advisability of conducting a long-term research cycle. This article only presents preliminary analyses. The necessity to perform them resulted from the specific requirements for military technologies3 which, as broadly as possible, should be knowledge-based. The knowledge-based approach by its very nature allows continuous improvement of the adequacy of the predictions made, the estimation of the level of risk when diagnosing deviations from the repeatability or precision of the model, and the possibility of adapting the technology to the changing requirements of the user resulting from tactical considerations of its use.

scholarly journals New paradigm for nuclear data evaluation

2020 ◽  
Vol 239 ◽  
pp. 11001
Author(s):  
M. Herman ◽  
D.A. Brown ◽  
M.B. Chadwick ◽  
W. Haeck ◽  
T. Kawano ◽  
...  
Keyword(s):  
Nuclear Reaction ◽  
Error Compensation ◽  
Nuclear Data ◽  
Covariance Matrices ◽  
Data Evaluation ◽  
New Paradigm ◽  
New Approach ◽  
Reaction Data ◽  
Cross Correlations

A new paradigm for nuclear reaction data evaluations is proposed to produce adjusted libraries that take into account integral experiments on the same footing as the differential ones. These evaluations will provide comprehensive covariance matrices including cross-correlations among different materials/reactions that are critical for realistic propagation of data uncertainties to integral quantities. The new approach should also reduce error compensation issues and facilitate updating of the library to account for new or corrected experiments and advances in reaction modeling.

New technology and career development in vocational guidance and career counseling: what is the challenge?

RISORSA UOMO ◽  
2012 ◽  
pp. 151-162
Author(s):  
Keyword(s):  
Career Development ◽  
Information And Communication Technologies ◽  
Career Counseling ◽  
New Technology ◽  
Communication Technologies ◽  
Vocational Guidance ◽  
New Paradigm ◽  
Career Service ◽  
Depth Study ◽  
Information And Communication

This work aims to present the emerging challenge of Information and Communication Technologies (ICT) for career development in vocational guidance and career counseling. Based on the new paradigm for the 21st century, Life Designing Counseling, the use of ICT is suggested as favoring flexible and dynamic career construction processes. Various instruments for career counseling online are presented, the theme of accessibility is discussed in terms of cost/effectiveness of career service to prevent the risk of unintentional social injustice and to favor a greater correspondence between career services and the needs of individuals. This work permits an in depth study of the complexity of ICT, with the aims of understanding its opportunities and limits, offering new perspectives in research and intervention.

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