There have been recent applications of genetic algorithms to information retrieval, mostly with respect to relevance feedback. Nevertheless, they are yet to be evaluated in a way that allows them to be compared with each other and with other relevance feedback techniques. We here implement the different genetic algorithms that have been applied in the literature together with some of our own variations, and evaluate them using the residual collection method described by Salton in 1990 for the evaluation of relevance feedback techniques. We compare the results with those of the Ide dec-hi method, which is one of the traditional methods that yields the best results. 相似文献
The current study examined the perceptions by Dutch natives and four immigrant groups (Surinamers, Antilleans, Turks, and Moroccans) on four topics relevant for the functioning of the Netherlands as a multicultural society: immigrants’ feelings of comfort in living in the Netherlands, their perceived discrimination, their cultural maintenance, and Dutch involvement with them. As predicted, Dutch natives estimated the immigrants’ view more accurately in a contact domain (perceived discrimination) than in a non-contact domain (feelings of comfort) and the attitude differences between Dutch natives and immigrants were smaller in a contact domain (Dutch involvement) than in a non-contact domain (cultural maintenance). The study also examined the relation between ethnic hierarchy (cultural distance), educational level, and experiences of the ethnic groups. Turks and Moroccans (who occupy a lower position in the Dutch ethnic hierarchy and are less schooled) reported less positive feelings and experiences in the Netherlands than Surinamers and Antilleans (who are higher in the ethnic hierarchy and are better schooled). 相似文献
The paper has two goals. The first is presenting the main results of the recent report Ethics of Connected and Automated Vehicles: recommendations on road safety, privacy, fairness, explainability and responsibility written by the Horizon 2020 European Commission Expert Group to advise on specific ethical issues raised by driverless mobility, of which the author of this paper has been member and rapporteur. The second is presenting some broader ethical and philosophical implications of these recommendations, and using these to contribute to the establishment of Ethics of Transportation as an independent branch of applied ethics. The recent debate on the ethics of Connected and Automated Vehicles (CAVs) presents a paradox and an opportunity. The paradox is the presence of a flourishing debate on the ethics of one very specific transportation technology without ethics of transportation being in itself a well-established academic discipline. The opportunity is that now that a spotlight has been switched on the ethical dimensions of CAVs it may be easier to establish a broader debate on ethics of transportation. While the 20 recommendations of the EU report are grouped in three macro-areas: road safety, data ethics, and responsibility, in this paper they will be grouped according to eight philosophical themes: Responsible Innovation, road justice, road safety, freedom, human control, privacy, data fairness, responsibility. These are proposed as the first topics for a new ethics of transportation.
To examine the effect of long lasting practice on pedal behavior in sport, we compared experienced adult soccer players and nonsoccer players on leg preference in motor tasks requiring general mobilization, soccer related mobilization, and body balance stabilization. We also evaluated performance asymmetry between the right and left legs in static and dynamic unipedal body balance, based on center of pressure displacement, and correlated that with leg preference in balance stabilization tasks. Results revealed (a) a distinct leg preference between mobilization and stabilization tasks, which were significantly different between players and nonplayers, (b) similar balance stability between the right and left legs, (c) greater stability of experienced players compared with nonplayers in static and dynamic balance, and (d) absence of a significant leg preference correlation with interlateral balance asymmetry. These results suggest an effect of extensive soccer skill practice on establishing leg preference for specific mobilization tasks and overall balance control. 相似文献
