Offering time windows to receivers of last-mile delivery is becoming a distinguishing factor. However, we see that in practice carriers have to create routes for their vehicles based on destination information, that is just being revealed when a parcel arrives in the depot. The parcel has to be assigned directly to a vehicle, making this a Dynamic Assignment Vehicle Routing Problem. Incorporating time windows is hard in this case. In this paper an approach is presented to solve this problem including Time Windows. A comparison is made with a real observation and with a solution method for the base problem
LINK
The media are an integral part of how advanced societies are controlled. After almost a century of ‘broadcasting’, a new media logic can be seen to have emerged. It is not centralized, nor does it appear to depend on manipulative power (such as the priming and framing of news and thereby the agenda of political discussion; or ‘advertising’ as a way to influence consumers to buy particular products). It is the logic of ‘networking’ that is not about producers and consumers but about redaction and multipliers.1 Media content in this logic may in an archeological sense be seen as having an author or a point of origin – but the routes it takes and the way in which it spreads offers new means of community building, identity construction and meaning making which are of much greater interest. In this paper we take a double perspective (business and critical) to assess how the old and the new media logics are both relevant today and what terms are best used to work with and in the media, and to reflect on them. While producers and consumers are the senders and receivers of broadcasting in the age of the nation-state, networking logic has little use for these terms: it also moves away from marketing terms such as eyeballs and stickiness to terms such as spreadability and multiplication and redaction. The perspective of what used to be known as ‘qualitative audience research’ can prove useful to innovative and sustainable marketing and to critical reflection on media culture. Here its restyled form will be called participant design. It suggests that strong marketing respects and co-opts potential customers in much the same way that relevant media criticism is, not given from an external and possibly paternalist but from an inside perspective that highly values self-reflexivity.2
Communication problems are acknowledged as hazardous eventualities affecting operations negatively. However, a few systematic attempts have been made to understand the pattern of communication issues and their contribution to safety events. In this paper, we present the AVAC-COM communication model and taxonomy based on the cybernetics approach and a literature review. The model elements and taxonomy variables regard the actors, signals, coders, interference, direction and timing, predictability, decoders, and channels. To test the applicability and potential value of the AVAC-COM framework, we analysed 103 safety investigation reports from aviation published between 1997 and 2016 by the respective authorities of Canada, the United States, Australia, the United Kingdom and the Netherlands. The overall results of the 256 cases of communication flaws detected in the reports suggested that these regarded more frequently Human-Media and Human-Human interactions, verbal and local communications as well as unfamiliarity of the receivers with the messages transmitted. Further statistical tests revealed associations of the region, time period, event severity and operations type with various variables of the AVAC-COM taxonomy. Although the findings are only indicative, they showed the potential of the AVAC-COM model and taxonomy to be used to identify strong and weak communication elements and relationships in documented data such as investigation and hazard reports.
In dit project wordt de techno-economische en sociale haalbaarheid getest van een zonwering systeem dat tevens zonne-stroom en –warmte opwekt, passieve ruimtekoeling levert, en een deel van het natuurlijk daglicht binnenlaat, gericht op appartementenhoogbouw: een sector waarin op dit moment enorm wordt geworsteld met duurzame energie oplossingen. Het gaat om een horizontaal systeem van spiegelende lamellen voor installatie aan een buitengevel, voor glaspartijen. Het systeem gebruikt één gecentraliseerde pv receiver per serie lamellen, waardoor de kostprijs gedrukt wordt. Het systeem is vernieuwend omdat energiewinning uit glazen elementen bij bestaande bouw bijna niet bestaat. Tevens biedt het de kans de integrale energiehuishouding van appartementenhoogbouw te bedienen in één enkel systeem. Het Solar Energy Blinds systeem is ontworpen om laagdrempelig te installeren te zijn in de bestaande bouw, aan de buitengevel en het systeem laat zich uitermate goed schalen. Uitgangspunt voor deze validatie en haalbaarheidsstudie is een bestaand proof-of-concept tafelmodel prototype. Experimentele tests worden verricht naar i) de elektriciteitsopwekking, via IV bepalingen aan de pv cellen, ii) warmte van het systeem, via continue logging van thermokoppels op verschillende plaatsen op de receivers, iii) lichtdoorlatendheid van het systeem met photometers. We verrichten tests in het lab en ‘on-sun’ in Oost, Zuid, en West oriëntaties. Hieruit komt een werkings- en opbrengstanalyse voort. Gelijktijdig worden verbeteringen ontworpen richting de maakbaarheid, schaalbaarheid, vormgeving, schoonmaak en inpasbaarheid. Op basis van de verbeteringen wordt de kostprijs bepaald. Het bovenstaande dient als input voor een haalbaarheidsanalyse. Het consortium verspreidt de resultaten van dit project, en bereidt op basis van de resultaten een vervolg-subsidieaanvraag voor, zo nodig met een uitbreiding van het consortium.
