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Hans Liwång

Bio: Hans Liwång is an academic researcher from Swedish National Defence College. The author has contributed to research in topics: Risk analysis & Risk management. The author has an hindex of 5, co-authored 27 publications receiving 113 citations. Previous affiliations of Hans Liwång include Defence Materiel Administration & Royal Institute of Technology.

Papers
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TL;DR: In this paper, the authors present a more detailed ship security risk analysis than described in the International Ship and Port Facility Security code and evaluate to what extent this more detailed analysis increases ship security and facilitates the effective selection of risk control options.
Abstract: This study reviews ship security assessment. The objectives are to explore the possibilities for quantifying and performing a more thorough ship security risk analysis than that described in the International Ship and Port Facility Security code and to evaluate to what extent this more detailed analysis increases ship security and facilitate the effective selection of risk control options. The study focuses on Somali-based maritime piracy, using piracy on the Indian Ocean as a case study. Data are collected using questionnaires and interviews with civilian and military security experts who possess firsthand experience of piracy off the coast of Somalia. The data are collected specifically for this study and describe and quantify the threat’s capability, intent and likelihood of exploiting a ship’s vulnerability. Based on the collected description of the threat, the study analyzes and describes: probability of detection by pirates, probability of successful approach, and probability of successful boarding. The performed work shows good agreement between calculated probabilities and frequencies in the cited incident reports. Also, the developed scenarios describe the most important influences on the analyzed areas. The research therefore shows that the proposed risk-based approach, which uses structurally collected and documented information on the threat, can increase ship security by assisting in selecting risk control options. The approach also allows for a better understanding of the causal relationship between threat and risk than that provided in today’s security analysis by ship owners, for example. This understanding is crucial to choosing effective and robust risk control options.

38 citations

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01 Dec 2014
TL;DR: In this article, the authors discuss limitations with the risk-based approaches in regard to aspects such as uncertainties, uncertainties, the nature of the threats, and the complexity of the risks.
Abstract: Today several nations utilise risk based approaches in military planning. However, the discussion on limitations with the approaches in regard to aspects such as uncertainties, the nature of the th ...

12 citations

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TL;DR: In this paper, military ocean patrol vessels (OPVs) are used to facilitate the wide range of tasks with small crews, OPVs represent several ship design compromises and are today an increasingly common type of naval ship.
Abstract: Military ocean patrol vessels (OPVs) are today an increasingly common type of naval ship. To facilitate the wide range of tasks with small crews, OPVs represent several ship design compromises betw ...

10 citations

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TL;DR: In this article, the authors identify challenges for ship operators when developing their ship security management and investigate two central aspects in the analysis: understanding the threat and understanding how a security threat affects the crew and operation of the ship.
Abstract: Piracy can lead to risks so high that they, according to the International Maritime Organization, are tolerable only if risk reduction is not practicable or is disproportionate to the benefits achieved. Therefore, there is a need for reducing ship security risks in relation to antagonistic threats such as piracy. The aim of this study is to identify challenges for ship operators when developing their ship security management. Furthermore, this study also investigates two central aspects in the analysis: understanding the threat and understanding how a security threat affects the crew and operation of the ship. It is clear from the analysis that the importance of subjective aspects beyond a ship operators’ direct control is high. This seems to be the fact for all aspects of the risk management process. The situation is also dynamic as the security risk, as well as the risk perception, can change dramatically even though there are no actual operational changes. As a result, the ship security management process is highly iterative and depends on situations on board as well as conditions out of the ship operator’s control. In order to make ship security manageable, the risk management has to put particular focus on methodological understanding, relevant system understanding and well-defined risk acceptance criteria as well as on including all levels of the organization in the risk reduction implementation and on a continuous monitoring.

9 citations

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TL;DR: In this article , the authors investigate the role of government, industry, and academia in the early phase design of systems for security and defense, and identify the need for a pragmatic relationship to traditional scientific traditions to capture the multitude of perspectives present.
Abstract: There is a gap between policy-makers and technology development. This gap leads to risks concerning nontechnical system properties and ineffective interactions between technical and social components. The study investigates co-creation between government, industry, and academia and how nontechnical system properties and interactions between technical and social components are considered in the early phase design of systems for security and defense. Co-creation is here understood as a specific form of research collaboration facilitating results that would not have been possible without a joint approach between policy-makers and technology development. Throughout the analysis, an example of AI and air defense is used as a case to exemplify the challenges and solutions discussed. The study analyses how higher education institutions can create an arena for relevance, rigor and design joining the hard perspectives of the industry with the soft perspectives of policy, social and critical sciences. The study identifies that involved parties must acknowledge the need for a pragmatic relationship to traditional scientific traditions to capture the multitude of perspectives present. It is identified that the proposed co-creation can contribute to articulating societal challenges, conflicting values, and alternative design principles into the solution at early concept design phases. Co-creation could also be an arena for joint development of the more specific design approaches needed for later design steps. However, this contribution depends on an openness to the challenges and knowledge gaps and that higher education institutions maintain their autonomy. • There is a gap between the socially defined ambitions and design of new technology. • Co-creation add relevance, rigor and a more comprehensive approach to the design. • Co-creation contribute with alternative design principles. • Co-creation contribute with articulating societal challenges.

6 citations


Cited by
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TL;DR: This book will not become a unity of the way for you to get amazing benefits at all, but, it will serve something that will let you get the best time and moment to spend for reading the book.
Abstract: It sounds good when knowing the nature of managerial work in this website. This is one of the books that many people looking for. In the past, many people ask about this book as their favourite book to read and collect. And now, we present hat you need quickly. It seems to be so happy to offer you this famous book. It will not become a unity of the way for you to get amazing benefits at all. But, it will serve something that will let you get the best time and moment to spend for reading the book.

1,521 citations

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384 citations

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01 Jan 2003

230 citations

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TL;DR: In this article, the authors presented a methodology for the analysis of Arctic shipping accident scenarios using Bayesian Networks (BN) and applied it to a scenario involving a collision between a vessel and an iceberg.
Abstract: This paper presents a methodology for the analysis of Arctic shipping accident scenarios using Bayesian Networks (BN). The proposed methodology is applied to a scenario involving a collision between a vessel and an iceberg. The study aims to identify the most significant causative factors to the potential accident scenarios. It is achieved by undertaking a sensitivity analysis study. The results inform the development of measures to avoid and control accidents during Arctic shipping.

86 citations

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TL;DR: In this article, the authors developed a quantitative risk assessment (QRA) model to evaluate the risk of ship being involved in ship collisions which takes into account the frequency and consequence of all possible accident scenarios.
Abstract: This study develops a quantitative risk assessment (QRA) model to evaluate the risk of ship being involved in ship collisions which takes into account the frequency and consequence of all possible accident scenarios. Two accident consequence types including human life loss and oil pollution which is measured in terms of the volume of oil spilled are considered in this study. The proposed QRA model consists of a collision frequency estimation model, an event tree and consequence estimation models. The event tree comprises five intermediate events including ship type, ship size, loading condition, hull damage and survivability. Two “generic” mathematic models are developed to estimate the human life loss and oil pollution caused by ship collisions, respectively. A case study is finally created using the real-time ship movement data in the Singapore Strait from the Llyod’s Marine Intelligence Unit (Lloyd’s MIU) database. Results show that the container ship, bulk carrier and oil tanker are the three main ship types being involved in collision accidents. Although the passenger/RORO ship has the lowest frequency being involved in collisions, it will suffer the most serious consequence in terms of the human life loss once it is involved in an accident. Considering the relative high percentage of oil tankers involving in ship collisions and their severe consequences, focus should be placed on the tracking and management of oil tanker traffic.

52 citations