An Advanced Salvage Method for Damaged Ship Structures

2021 ◽  
Author(s):  
Alessandro La Ferlita ◽  
Helge Rathje ◽  
Thomas Lindemann ◽  
Patrick Kaeding ◽  
Robert Bronsart
Keyword(s):  
Decision Making ◽  
Environmental Conditions ◽  
Bending Moment ◽  
Decision Making Process ◽  
Iterative Approach ◽  
Short Term ◽  
Smith Method ◽  
Longitudinal Strength ◽  
Wave Induced ◽  
Damaged Ship

An advanced salvage method is proposed for damaged ships to ensure a short-term decision-making process for a safe ocean towage to the repair yard. The residual longitudinal strength must be greater than the sum of the still water and the maximum vertical wave bending moment. The ultimate bending moment is determined numerically for a container vessel by using an incremental iterative approach (Smith method) and wave-induced loads are predicted by means of hydrodynamic analyses. Successful applicability of the advanced salvage method is demonstrated for a damaged container vessel, which was towed from La Libertad, Ecuador, via Panama to the repair yard in Zhoushan, China, in restricted environmental conditions.

Multivariable Automatisierungsentscheidungen*/Multivariate automation decisions – A tool for cost-benefit assessments as a basis for decision-making

2019 ◽  
Vol 109 (03) ◽  
pp. 134-139
Author(s):  
P. Burggräf ◽  
J. Wagner ◽  
M. Dannapfel ◽  
K. Müller ◽  
B. Koke
Keyword(s):  
Decision Making ◽  
Decision Support ◽  
Environmental Conditions ◽  
Cost Benefit ◽  
Decision Support Tool ◽  
Decision Making Process ◽  
Support Tool ◽  
Cost And Benefit ◽  
Benefit Evaluation ◽  
Level Of Automation

Der wachsende Bedarf an Wandlungsfähigkeit führt zu einer höheren Frequenz in der Umplanung von Montagesystemen und erfordert eine kontinuierliche Überprüfung und Anpassung des Automatisierungsgrades. Um auch die komplexen Umgebungsbedingungen abzubilden, sollen nicht-monetäre Faktoren in den Entscheidungsprozess eingebunden werden. Um die Entscheidung zu unterstützen, stellt dieser Beitrag ein Tool zur Identifizierung und Bewertung von Automatisierungsszenarien mittels einer Nutzwert-Aufwand-Analyse vor.   The increasing need for adaptability in assembly leads to a higher planning frequency of the system and requires continuous checks and adaptations of the appropriate level of automation. To account for the complex environmental conditions, non-monetary factors are included in the decision-making process. This paper presents a decision support tool to identify and evaluate automation scenarios by means of cost and benefit evaluation.

Influence of Whipping on Long-term Vertical Bending Moment

2004 ◽  
Vol 48 (04) ◽  
pp. 261-272
Author(s):  
Gro Sagli Baarholm ◽  
Jørgen Juncher Jensen
Keyword(s):  
Nonlinear Response ◽  
Extreme Values ◽  
Bending Moment ◽  
Sea Waves ◽  
Short Term ◽  
Strip Theory ◽  
Long Time ◽  
Wave Induced ◽  
Vertical Bending Moment

This paper is concerned with estimating the response value corresponding to a long return period, say 20 years. Time domain simulation is required to obtain the nonlinear response, and long time series are required to limit the statistical uncertainty in the simulations. It is crucial to introduce ways to improve the efficiency in the calculation. A method to determine the long-term extremes by considering only a few short-term sea states is applied. Long-term extreme values are estimated using a set of sea states that have a certain probability of occurrence, known as the contour line approach. Effect of whipping is included by assuming that the whipping and wave-induced responses are independent, but the effect of correlation of the long-term extreme value is also studied. Numerical calculations are performed using a nonlinear, hydroelastic strip theory as suggested by Xia et al (1998). Results are presented for the S-175 containership (ITTC 1983) in head sea waves. The analysis shows that whipping increases the vertical bending moment and that the correlation is significant.

The distribution and abundance of dictyoceratid sponges in relation to hydrodynamic features: identifying candidates and environmental conditions for sponge aquaculture

2007 ◽  
Vol 58 (7) ◽  
pp. 624 ◽  
Author(s):  
R. J. Bannister ◽  
R. Brinkman ◽  
C. Wolff ◽  
C. Battershill ◽  
R. de Nys
Keyword(s):  
Decision Making ◽  
Species Richness ◽  
Environmental Conditions ◽  
High Energy ◽  
Decision Making Process ◽  
Barrier Reef ◽  
Hydrodynamic Conditions ◽  
Ecological Data ◽  
Broad Distribution ◽  
Island Group

The distribution and abundance of dictyoceratid sponges was surveyed to a depth of 20 m at eleven locations within the Palm Island Group, Great Barrier Reef (GBR), Australia. These surveys were related to prevailing hydrodynamic conditions to identify candidates and environmental conditions for sponge aquaculture. Locations were classified as sheltered, intermediate and exposed using quantitative wave exposure and current force models. The species richness of dictyoceratid sponges was high with ten taxa, but the abundance of most species was low with patchy distributions. Two species, Coscinoderma sp. and Rhopaloeides odorabile, were abundant, and detailed surveys of these species were conducted at seven locations representing common habitats within the Palm Island Group. Coscinoderma sp. was present at all locations and although abundances differed significantly across locations, this was not related to hydrodynamic conditions. In contrast, R. odorabile was only present at exposed locations with low abundance. The higher abundance and broad distribution of Coscinoderma sp. supports its selection as an aquaculture candidate. In contrast, R. odorabile was less abundant and was restricted to high-energy environments making aquaculture more problematic. The present study demonstrates the importance of ecological data in the decision-making process for new species aquaculture.

On the optimal specificity of legal rules

2007 ◽  
Vol 3 (2) ◽  
pp. 147-164 ◽  
Author(s):  
VINCY FON ◽  
FRANCESCO PARISI
Keyword(s):  
Decision Making ◽  
Environmental Conditions ◽  
Optimal Choice ◽  
Decision Making Process ◽  
Legal Rules ◽  
Optimal Degree ◽  
Basic Model ◽  
Levels Of Detail ◽  
Legislative Processes ◽  
Different Levels

Abstract:Lawmakers can choose to craft laws with different levels of detail to guide judges in their decision-making process, incorporating rules or standards into the laws they write. The optimal degree of specificity of legal rules under different environmental conditions and the functionality of these rules or standards are the subjects of the present study. A basic model of optimal specificity of laws is presented, clarifying the relevance of legal obsolescence and volume of litigation in the optimal choice. We then consider the important influence of codification style, judges’ specialization, and complexity of reality on the optimal choice of legislative instrument. The implications of our results are then reexamined in light of the more complex institutional reality that characterizes contemporary legislative processes in various areas of the law.

Crisis Decision Making in Foreign Policy

2017 ◽  
Author(s):  
David Houghton
Keyword(s):  
Decision Making ◽  
Foreign Policy ◽  
International Relations ◽  
English Language ◽  
Decision Making Process ◽  
Human Beings ◽  
Short Term ◽  
Broad Agreement ◽  
The Many ◽  
Increased Pressure

Despite the frequency with which the term is used in the English language, there is relatively little agreement as to what constitutes a “crisis” in the study of foreign policy and international relations. If there is no broad agreement on this, however, there is at least more consensus on what usually happens during one. Crises typically involve the centralization of power, are associated with a “narrowing” of options and the increased use of analytical shortcuts, and typically feature increased vertical communications and argumentation among advisers as well as increased pressure to attain comprehensive rationality. There is some doubt as to whether the effort to attain rationality will be successful in practice, of course, given the many cognitive psychological limitations that make it difficult for human beings to reach fully reasoned decisions. Crises may—somewhat ironically, perhaps—be good for leaders, because in the short-term they offer the chance to increase power capabilities. While it is difficult to predict crises in advance—indeed, one of the central features of crises is their very unpredictability—various techniques may help the decision making process once a foreign policy crisis has begun.

scholarly journals DECISION MAKING AND ADAPTATION PROCESSES TO CLIMATE CHANGE

2016 ◽  
Vol 19 (4) ◽  
pp. 215-234 ◽  
Author(s):  
EDUARDO SANDOVAL BUSTOS ◽  
◽  
SEBASTIÁN DIAZ VICUÑA ◽  
Keyword(s):  
Climate Change ◽  
Decision Making ◽  
Environmental Conditions ◽  
Decision Making Process ◽  
Adaptation To Climate Change ◽  
Knowledge Source ◽  
Communication Processes ◽  
Adaptation Processes ◽  
The Way

Abstract Climate change imposes certain challenges not only to ecosystems but to societies as well. The change in environmental conditions makes necessary to review the decision-making process related to adaptation to climate change. This review should consider future risks or current conditions of vulnerability through existing mechanisms in organizations or societies. From this analysis onwards, processes must be developed allowing, either to prepare the way to face expected future impacts or to decrease the current vulnerability regarding climate by creating more resilient systems. In this context, the role of the academy, as a knowledge source, results fundamentally. Nevertheless, this highlight the need to review and improve the communication processes from academy towards different interests groups by means of the co-production and strengthening of links among different society components.

Data Analysis for Dynamic Pricing in Airline

2014 ◽  
Vol 16 (1) ◽  
pp. 14-22
Author(s):  
Rahul Bhaskar
Keyword(s):  
Decision Making ◽  
Airline Industry ◽  
Dynamic Pricing ◽  
Pricing Strategy ◽  
External Information ◽  
Decision Making Process ◽  
Short Term ◽  
Ticket Pricing ◽  
Airline Company

The competitors in the airline industry often rely on pricing strategy to capture more sales as a main mean of competition. Thus, dynamic pricing is often utilized to maximize profit while allowing better pricing against competition at the same time. In order for dynamic pricing to be effective, airline company has to take in consideration both internal and external information. Tactical pricing is an important component for airline, for it provides both short term and long term strategies to ticket pricing. The case is an exemplification of how tactical pricing plays an important role in the decision making process of an airline company.

scholarly journals Government-led Resettlement after Natural Disasters as a Durable Solution? The Case of Cyclone Idai

2020 ◽  
Author(s):  
Carolien Jacobs ◽  
Bernardo Almeida
Keyword(s):  
Climate Change ◽  
Decision Making ◽  
High Risk ◽  
Citizen Participation ◽  
Disaster Response ◽  
Decision Making Process ◽  
Short Term ◽  
Risk Areas ◽  
The Government ◽  
Term Response

Abstract Thousands of people had to flee their homes when Cyclone Idai hit Mozambique in 2019. In its aftermath, the government resettled more than 80,000 people from high-risk areas to safer ground. This article analyses resettlement as a durable solution to disaster response. The question of durable resettlement due to climate-related displacement is especially pertinent in the light of ongoing climate change. Based on empirical research, we show that, although the government succeeded in providing a short-term response to the disaster, there are two major impediments to using resettlement as a durable solution: the lack of citizen participation in the decision-making process leading to resettlement; and the gap between the short-term humanitarian perspective and a longer-term development viewpoint. Resettlement can hardly be seen as a durable solution to climate-related displacement as long as key principles are not respected.

scholarly journals Mice adaptively generate choice variability in a deterministic task

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Marwen Belkaid ◽  
Elise Bousseyrol ◽  
Romain Durand-de Cuttoli ◽  
Malou Dongelmans ◽  
Etienne K. Duranté ◽  
...  
Keyword(s):  
Decision Making ◽  
Reinforcement Learning ◽  
Success Rate ◽  
Decision Maker ◽  
Environmental Conditions ◽  
Optimal Strategy ◽  
Temporal Structure ◽  
Decision Making Process ◽  
Reward Delivery ◽  
Deterministic Setting

AbstractCan decisions be made solely by chance? Can variability be intrinsic to the decision-maker or is it inherited from environmental conditions? To investigate these questions, we designed a deterministic setting in which mice are rewarded for non-repetitive choice sequences, and modeled the experiment using reinforcement learning. We found that mice progressively increased their choice variability. Although an optimal strategy based on sequences learning was theoretically possible and would be more rewarding, animals used a pseudo-random selection which ensures high success rate. This was not the case if the animal is exposed to a uniform probabilistic reward delivery. We also show that mice were blind to changes in the temporal structure of reward delivery once they learned to choose at random. Overall, our results demonstrate that a decision-making process can self-generate variability and randomness, even when the rules governing reward delivery are neither stochastic nor volatile.

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