Duplicate Suppression for Efficient Floating Car Data Collection in Heterogeneous LTE-DSRC Vehicular Networks

in Computer Communications (2018), 123

Collecting data from a large number of agents scattered over a region of interest is becoming an increasingly appealing paradigm to feed big data archives that lay the ground for a vast array of ... [more ▼]

Collecting data from a large number of agents scattered over a region of interest is becoming an increasingly appealing paradigm to feed big data archives that lay the ground for a vast array of applications. Vehicular Floating Car Data (FCD) collection is a major representative of this paradigm. Massive data collection from floating vehicles is the key to Intelligent Transportation Systems. We address the design and performance evaluation of a data collection protocol for the use case of periodic data collection. We target robustness, optimizing the amount of data and the value of the collection period, keeping in mind the goals of autonomous node operation and minimal coordination effort. From a system point of view, we believe that best solutions should jointly exploit the Long Term Evolution (LTE) cellular access network and the Dedicated Short-Range Communication (DSRC) based Vehicular Ad Hoc Network (VANET). Through a detailed comparative analysis, we show that such a hybrid approach offers superior performance, especially as for offloading the cellular radio access. A lightweight signaling procedure is designed, based on the DSRC VANET, which is able to avoid most of the duplicated data records, even if a distributed operation approach is pursued. The impact of the proposed protocol on the VANET load is evaluated and proved to be quite small, so that it does not interfere with other VANET-specific messages. [less ▲]

The duration and durability of cabinet ministers

in International Political Science Review (2012), 33(5), 505-519

This article surveys the growing research programme on the duration of cabinet ministers. It examines some of the conceptual and methodological issues confronting research, including the nature and ... [more ▼]

This article surveys the growing research programme on the duration of cabinet ministers. It examines some of the conceptual and methodological issues confronting research, including the nature and measurement of durability, ministerial terms and techniques. It considers some of the theories and hypotheses that have been generated by researchers. Using evidence from studies from around the world, it argues that institutional factors, including regime type, constitutional and parliamentary rules, and party systems, affect ministerial durability. Personal ministerial characteristics, such as gender, education and age, also affect durability. It examines future avenues of research in this field. [less ▲]

Durch die Brille der Systemtheorie. Ein Blick auf die ambivalente Kinderliteratur

Presentation (2017, June 12)

Durch Phasenumwandlungen bedingte Hysterese- und Oszillationserscheinungen an festen Katalysatoren

Doctoral thesis (1987)

A Dusty Road to the Riviera?

Article for general public (2022)

Dutch field tests validating the bearing capacity of Fundex piles

in Proceedings of CPT’18 – International Symposium on Cone Penetration Testing (2018, June)

In 1939, Boonstra was the first to base the tip bearing capacity of foundation piles on the CPT cone resistance. Since then, many engineers and scientists have proposed improved design methods for the ... [more ▼]

In 1939, Boonstra was the first to base the tip bearing capacity of foundation piles on the CPT cone resistance. Since then, many engineers and scientists have proposed improved design methods for the bearing capacity of foundation piles, such as the Dutch Koppejan method. This method holds a mistake in the qc-averaging method. Its tip resistance is based on the cone resistance of an assumed zone between 8D above the tip and 4D below the tip, while several researchers show that this should be in a zone between 2D above the tip and 8D below the tip. In the Netherlands, Belgium and France a field test has been performed indicating that the currently used design method in the Netherlands (the Koppejan Method) was about 30% too high for the tip resistance. This, and also the current qc-averaging method, conflict with the findings of Boonstra, Plantema, Huizinga and White & Bolton. Besides, in the field test, the residual stresses in the piles after installation were completely ignored, in fact, not even measured. Nevertheless, the Dutch Norm Commission Geo-Engineering decided to reduce the bearing capacity of foundation piles in the Netherlands, unless other field tests prove otherwise. Since this reduction is very drastic and since no serious problems due to the use of the unreduced bearing capacity were recorded, the geotechnical contracting company Funderingstechnieken Verstraeten BV has performed field tests on six Fundex piles, and asked the engineering company BMNED to assist with these tests and the design. The aim was to prove that, at least for Fundex piles, a reduction of 30% is too much. The Fundex Pile Tests in Terneuzen show that, especially for the grouted Fundex piles, the pile type factor should not be reduced in combination with the current qc-averaging method. [less ▲]

Dutch Journalism in the Digital Age (Dataset)

Textual, factual or bibliographical database (2013)

The Dutch Parliament and EU Affairs: Decentralizing Scrutiny

in Hefftler, Claudia; Neuhold, Christine; Rozenberg, Olivier (Eds.) et al The Palgrave Handbook of National Parliaments and the European Union (2015)

Dutch–Chinese repertoires and language ausbau in superdiversity: A view from digital media

in Discourse, Context and Media (2014), 3(4-5), 48-61

The Chinese diaspora in the Netherlands is undergoing a dramatic diversification since the 1990s. This is manifested sociolinguistically in a shift from Cantonese and traditional character script to ... [more ▼]

The Chinese diaspora in the Netherlands is undergoing a dramatic diversification since the 1990s. This is manifested sociolinguistically in a shift from Cantonese and traditional character script to Mandarin and simplified characters as default registers of Chinese. Young people of Chinese heritage critically respond to and (re-) position themselves against these changes. This paper explores their identity work and language identifications and adopts a view from digital media to this end. Such a view provides insight into the unstable and shifting conditions and contexts of being, speaking and learning Chinese in the diaspora. Theoretically the paper builds on a view of language as practice, translanguaging, repertoires and linguistic citizenship, and revisits Heinz Kloss' notion of “ausbau” as a concept in language policy and planning. Applied to both language and identity, the revisited notion of ausbau is meant to capture the tension between language/identity as an individual, biographic project involving personal investment and planning, and language/identity as a social, historical project sponsored by nations and states (such as the PRC). In the discussion threads that are presented and analysed, both of these poles provoke critical reflection and stancetaking: critique and resistance to the hegemonic power of the PRC's language ausbau, and self-critique in the form of self-depreciating evaluation of personally accomplished language ausbau. This contribution draws on a recently completed two-year ethnographic study in and around a Chinese complementary school in the Netherlands as part of a larger funded project investigating discourses of inheritance and identities in four multilingual European settings. [less ▲]

The Duty of Loyalty : Rethinking its Scope through its Application in the Field of EU External Relation

in Common Market Law Review (2010), 47(2), 323-359

The duty of loyalty and the effective implementation of common rules. Implementation of mixed agreements. The duty to facilitate the exercise of the external competence of the Union. The requirement of ... [more ▼]

The duty of loyalty and the effective implementation of common rules. Implementation of mixed agreements. The duty to facilitate the exercise of the external competence of the Union. The requirement of unity in the external representation of the Union and its Member States. [less ▲]