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-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- There are numerous discussions on possible leverage points in improving software quality and they have been placed in various context--from technical approach, improving user education to economic approach. One of central points of the discussions is on the best policy to handle vulnerability discoveries. Various approaches have been developed: from secret reporting, full-disclosure, responsible disclosure to a market approach. The dominant aspect of the latter is about the Vulnerability Black Market (VBM), which emerged due to the latter development, as an alternative for malicious hackers to sell exploits and malware that take advantage of the flaws in the software. The model in this paper draws on empirical observation on black markets and market-based approach for vulnerability discovery to generate a simple model of VBM. The model results suggest that efficient legal markets may attract malicious hackers to enter the legal markets and may reduce their likelihood to be involved in vulnerability black markets. However, better patching management may mitigate the abuse of software vulnerabilities.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- In the UK, formal tertiary education comes at monetary cost to those who choose to participate. Currently 43% of young people enter universities in the belief that they will recoup the initial expense in higher salaries, later in life. Whilst this is a historically true model for the majority of graduates, many analysts believe that the Government's push for a 50% participation rate, coupled with rising costs to attend university, could affect the profitability of higher education and lead to a situation where ignorance is not only bliss but also an economically sound decision.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- The Dutch Soft Drugs policy will soon be under review. Regarding Dutch Soft Drugs policy, the Dutch population and political arena could be divided into three groups: those who do not really care, those strongly in favor of legalizing cultivation and use of soft drugs, and those strongly in favor of banning soft drugs. The points of view of the two latter groups are analyzed in this paper
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- This paper deals with System Dynamics education at Delft University of Technology, the Netherlands. It focuses more specifically on the quadruple jump approach towards dealing with real-world dynamic complexity. The paper starts with an overview of the System Dynamics courses, situated within the broader curriculum. Then recent innovations in the Introductory System Dynamics course are discussed. Finally, some of the lessons learned are distilled. The rationale behind this paper are the beliefs that (higher) education determines to a large extent the quality of (the next generation) professional System Dynamics modelers, and hence, the field of System Dynamics as a whole, and that sharing (innovative and/or proven) educational practices, and exchanging actual and challenging (teaching and testing) cases may lead to further improving the quality of System Dynamics education.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- This paper deals with the use of âhotâ real-world cases for both testing and teaching purposes such as in the Introductory System Dynamics course at Delft University of Technology in the Netherlands. The paper starts with a brief overview of the System Dynamics curriculum. Then the problem-oriented teaching and testing approach is explained, followed by a presentation and discussion of several examples of âhotâ cases. The main goal of presenting the use of âhotâ testing/teaching cases is to spur other System Dynamics lecturers on to doing the same, and to start up a small network for exchanging the âhottestâ cases.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- By the end of December 2008, alarming reports and articles concerning the cholera outbreak in Zimbabwe received plenty of international media coverage. By that time 30000 cases of cholera infections and 1600 cholera deaths had been reported. In the first week of January 2009, a System Dynamics simulation model related to this cholera epidemic was created which was turned into a âhotâ testing/teaching case. Although the model contains some bold assumptions, the dynamics of the model is sufficiently interesting for to be presented. This case is a System Dynamics study under uncertainty focused on exploring the general dynamics over time.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- This paper presents a simple experimental System Dynamics model of the underlying value and market values of a bank to analyze the loss of trust in the bank. The System Dynamics model was developed on 28 September 2008 âthe day the governments of the Benelux countries met in a great hurry to rescue the Fortis bankâ in order to gain a better understanding of the potential dynamics of bank crises and to test policies for keeping banks from collapsing. The System Dynamics model âas well as the exam case based on itâ is interesting because of the actuality and importance of the topic, the small size and simplicity of the model, its potential to generate different dynamic behaviors, and its usefulness for policy exploration.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- Inventory control is a fundamental activity in closed loop supply chains, particularly for remanufacturing processes. Several models have been developed in the literature where the aim is mostly to optimize cost or profit and to find the optimal order quantity for an integrated production and remanufacturing system. In this study, we explore a System Dynamics approach in order to model an inventory control system for a remanufacturing process in the context of a Closed Loop Supply Chain. Particularly, the return process is modelled through the influences relationships which several factors have on such process. The factors considered are residence time of the product with customer, service agreement with customers and customer behaviour in returning used products. The findings suggest that a reduction of residence time and an increase in the level of service agreement with customers, which in turn increases customer behaviour in returning used product, can lead to efficiency in inventory management for companies involved in remanufacturing process. In addition, we provide two simple case studies in support of these findings.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- The aggregate profits of the airline industry have been dominated by a cyclical mode since before deregulation in the 1970s. In this paper we discuss several dynamics that combine to cause profit cycles: The misperception of the delay around capacity acquisition, the pro-cyclical ticket price setting policy and the countercyclical effect of industry congestion on passenger demand. By adding numerous endogenous feedbacks, extensions of previously used standard structures and wholly new structures we quantify the strength of these feedbacks, replicate the past behavior of the industry, and prescribe policies that can help to mitigate the cycle in airline industry earnings.
-
- Type:
- Document
- Date Created:
- 2009 July 26-2009 July 30
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, b3584c6b53c3f58e0202549d7d851f84, and 4818cb531cdd68d6ec6af3f291216fc7
- Description:
- The Latinamerican Chapter has the mission to help the SD-community grow in the Spanish speaking countries. Founded in 2003, it has Latinamerican members from Mexico to Chile, from Spain and a growing number of Spanish speakers living in other countries. Since 2003, the annual meeting allows practitioners to gather and newcomers to get in to touch; we have been in Mexico, Chile, Colombia and Argentina so far. Since 2005, the Spanish "Revista de Dinámica de Sistemas" publishes two numbers per year. The "sisTEMAS" newsletter and a mail list allow keeping in touch. During October, the 6th Latinamerican Conference took place in Santiago de Chile, organized by University of Talca, Adolfo Ibañez University, Diego Portales University and Andrés Bello University. During the 2008 Annual Meeting we met many Spanish-speaking members living outside the Spanish-speaking countries and the wider group continues to grow. This year's meeting will take place in Santa Marta, Colombia in November 2009 ( http://simon.uis.edu.co/eventosds2009/home/). It is an opportunity to talk about sponsorships and future joint activities and also to welcome new members. If you would like to join us please contact Gloria Perez Salazar ( gloria.perez@itesm.mx), Isaac Dyner ( idyner@unalmed.edu.co) or Martin Schaffernicht ( martin@utalca.cl).