109 research outputs found
NMR conformational study of the lanthanide(III) complexes of DOTA in aqueous solution
No full textMarques, M.P.M. ; Geraldes, C.F.G.C. ; Sherry, A.D. ; Merbach, A.E. ; Powell, H. ; Pubanz, D. ; Aime, S. ; Botta, M
Diplatinum spermine
No full textInelastic Neutron Scattering spectrum of Diplatinum spermine, C10H26Cl4N4Pt2, measured on the TOSCA instrument.
[æ-N,N'-bis(3-aminopropyl)butane-1,4-diamine-?4N,N':N'',N''']bis[dichloridoplatinum(II)], Pt2Sp
Dipalladium spermine
No full textInelastic Neutron Scattering spectrum of Dipalladium spermine, (PdCl2)2(Spm), measured on the TOSCA instrument.
{mu-{N,N´-bis[(3-amino-kN)-propyl]butane-1,4-diamine-kN:kN´}} tetrachloro-dipalladium (II
The initial imperfection databank at the Delft University of Technology: Part VI
No full textAerospace Engineerin
Failure: Analysis of an Engineering Concept
No full textThis thesis is an attempt to clarify a concept we are all familiar with, engineers and non-engineers alike. It shows that, behind the first impression of familiarity, there is a wide range of intuitions about failure which are not easily reconciled. While the ensuing ambiguities and lack of clarity may be tolerated in ordinary circumstances, engineers strive for precision and efficiency. These qualities become even more relevant given that engineering activities are increasingly carried out by multidisciplinary and multicultural teams. The chapters included in this thesis illustrate that pursuing conceptual clarification may result in valuable contributions to the existing literature. The identification of tacit assumptions that, so far, have gone undetected can help bringing some degree of order and unity to discussions that have shown a tendency towards fragmentation along disciplinary boundaries. As a whole, these chapters constitute the preliminaries of a conceptual framework that, once supplemented with additional engineering and philosophical contributions, may embrace the multiple facets of failure; a rather complex tangle of phenomena which, despite engineers’ efforts to rein it in, is not going to disappear from the engineering agenda anytime soon.Values, Technology and InnovationTechnology, Policy and Managemen
Afstemming fotogrammetrie en naverkenning
No full textEr is een onderzoek gedaan naar de afstemming tussen fotogrammetrie en naverkenning bij vervaardiging van de Grootschalige BasisKaart van Nederland (GBKN). Er is namelijk gebleken dat bij de huidige methode van naverkenning, de blok en relatiematen methode, de naverkenning en de inwerking daarvan gemiddeld 45 % van de totale vervaardigingskosten bedragen. Dit percentage moet terug gebracht worden. Als uitgangspunt voor dit onderzoek geldt het proces van GBKN-vervaardiging zoals dit plaats vindt in de provincie Utrecht.Civil Engineering and GeosciencesFotogrammetrie en remote sensin
Permanent pixels: Building blocks for the longevity of digital surrogates of historical photographs
No full textWithin the context of long-term access to digital objects in general this dissertation takes the longevity of digital surrogates of historical photographs into consideration. For memory institutes digitisation of analogue source material, such as historical photographs, is an exciting way to open up and exploit their holdings. The focus on the digital durability of this specific type of digital object enables the investigation of available building blocks for digital preservation, such as strategies, guidelines, standards, procedures and tools. A benchmarked digital capture process, the unambiguous formulation of preservation metadata and the application of persistent identifiers for digital objects, all based on open standards are important building blocks for the realisation of durable digital surrogates of historical photographs. Three methods for creating durable digital objects are assessed in detail. These are the application of a standardised digital image file format, the relevance of the application-independent XML data format for the encoding of a digital image, and unambiguous formulation of preservation metadata with the help of an international standard (ISO/IEC 11179). The research can be considered as a case-study in digital archiving and contributes to the improvement of the durability of digital objects in general.Electrical Engineering, Mathematics and Computer Scienc
Improving sustainability of road infrastructure projects by procurement
No full textThe Dutch government has declared the ambition to use its market power to stimulate sustainable development. The strategy set up to reach this goal, however, lacks support of governmental employees and does not significantly influence the market. In this study, we analyse the necessities to improve the current strategy as well as measures to do so. Hereby, we focus on procurement of road infrastructure projects, which have the most room for improvement. We are proposing a framework that supports sustainable development of road infrastructure via sustainable procurement by the government. This framework should be applied by the Dutch government to improve the current strategy.System Engineering, Policy Analysis and ManagementInfrastructures, Systems and ServicesTechnology, Policy and Managemen
Designing National Freight Maritime Network in Indonesia: A Supporting Study For Maritime Highway Policy (Kebijakan Tol Laut) in Some Future Scenarios
No full textIndonesian new government (under new President from 2014 election) issues ‘Maritime-highway’ policy by developing 24 strategic ports to form mainline of national maritime transportation network (Indonesian Ministry of Development Planning, 2015). This policy aims to reduce transportation cost as well as economy (price) disparities between west and east region in Indonesia. However, as a new policy from the new government, it still needs more supporting studies to optimize maritime network between selected strategic ports for freight transportation. In addition, as a national level policy, it also needs to consider macro economy future perspective since it will be implemented in a long term period. Therefore, a comprehensive study is conducted to develop a design of Indonesia’s freight maritime network using a multi-objectives optimization model with main objectives to minimize total cost and total distance simultaneously. Literatures review and analysis of Indonesia’s freight maritime network current situation are required to identify important factors for the model implementation. An Origin-Destination (OD) demand matrix for year 2030 is generated as the main input for simulation model analysis. There are three scenarios in the model simulation. First scenario uses OD matrix based on growth factor for each province that is calculated from Growth Domestic Regional Product (GDRP) realization (until 2013) and GDRP target from Indonesian government (until 2019 and continue the 2019 target to the year 2030). In the second scenario, a more balance demand especially in east region is applied by increasing growth factor for provinces with very low GDRP value. Finally, third scenario uses more equal handling cost among ports in the network with the same OD matrix from the second scenario. Furthermore, analysis and selection of alternatives in maritime network design are performed based on the results of the model simulation for each scenario. The final result of this study shows that the recommended maritime network designs have noticeable differences compare to initial network in maritime highway policy especially in the second and the third scenario. In these scenarios, the number and composition of hub and feeder ports are significantly changed due to more balance demand between provinces and more balance ports handling cost in the third scenario. There are also some additional routes, hub ports, and feeder ports for the east region in the recommended design for these two scenarios.Management of TechnologyEngineering Systems and ServicesTechnology, Policy and Managemen
The motivation of attackers in attack tree analysis
No full textThe number of cyberattacks has been growing over time and is expected to keep growing. In order to prevent such attacks, countermeasures have to be put in place by IT security experts. These IT security experts are however often tied to budgets and do not have a good overview of the threats that are present. It is thus necessary to provide them tools that can help them to decide on how to allocate their resources. One of these tools is the attack tree methodology, which is used to analyse complex attacks that consist of multiple steps. Properties of the overall security of the system are derived by properties of the smaller steps. These properties of the attack are represented in the form of parameters that are allocated to the nodes in the attack tree. Some of these parameters used are however dependent on the type of attacker. In order to be able to reuse the attack tree for analysing it for various types of attackers, the parameters in the attack tree have to be made independent of the attacker. In order to do so, attacker properties are considered separately, which are summarized in attacker profiles. So far, methods have been formed to include the attacker’s resources and the attacker’s skill in the attack tree methodology. The result of the current research is a framework that includes the motivation of the attacker in the attack tree methodology. The framework can be used by IT security experts to analyse the attack tree for variously motivated attackers, without having to update the parameter values. A design science approach is used to design the framework, which starts with the identification of the knowledge gap. The knowledge gap lies in how to include the motivation of the attacker in the attack tree methodology. This motivation is assumed to have an influence on the pay-off an attacker receives from performing an attack. The value that including the motivation in the analysis can bring can be summarized as the following: ? The gains parameter is made independent of the type of attacker ? Various pay-offs are possible for variously motivated attackers ? The gains parameter is made more realistic The framework is ensured to reach this potential added value, by adhering to a list of requirements. This list of requirements is build up from constraints to which the framework must conform and dilemmas for which a design choice has to be made. The resulting framework is mainly based on the method presented by Lenin et al. (2014). Changes to the current method are mainly made to the gains parameter. The gains is no longer a global parameter that is only received by the attacker when reaching the root node. Instead it is possible to include intermediate pay-offs, which means that gains can also be allocated to intermediate nodes. In this way, different gains are possible for different attack paths in the attack tree. The gains can thus be represented in a more fine grained way. Also an opt-out possibility is included to allow attackers to perform attacks to only reach an intermediate node and not the root node of the attack tree. In the current method the pay-off for an attacker was considered to be equal to the gains, which was the same for every type of attacker. This gains was also a single value. In the designed framework the gains has been slit up in five types of gains to deal with the five forms of motivation that an attacker may have, which are financial benefits, causing damage, knowledge gaining, pleasure seeking and gaining notoriety within a community. With the use of weight values, the importance of the various types of gains for an attacker can be represented. By multiplying the gains with the weight values, a pay-off can be calculated for a certain type of attacker. This way various pay-offs are possible for variously motivated attackers. A case study has been described to show the working of the framework on a real world case, which also served as a validation of the framework. In addition an expert opinion has been asked to validate the framework. The main improvement that can be made to the framework by future research is focussed on allocating values to the different types of gains and allocating the weight values for the different types of gains. Also attention could be paid to several dependencies between attack and attacker properties that have not yet been taken into account.Systems Engineering, Policy Analysis and ManagementInformation and Communication TechnologyTechnology, Policy and Managemen
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