4D Motives Of Anshun Bus Crash

Absence behavior as traffic crash predictor in bus drivers.

PROBLEM Various indicators of health have been shown to be associated with traffic crash involvement. As general health is also related to absence from work, the latter variable may be more strongly related to crashes, especially for professional drivers. METHOD Bus driver absence from work was analyzed in association with their crash records. Two British samples and one Swedish sample were u...

[Intensive media reporting following bus crash in Rasbo-Uppsala].

Powered two-wheeler drivers' crash risk associated with the use of bus lanes.

CONTEXT Authorizing powered two-wheeler drivers to drive in lanes reserved to buses is a measure that is sometimes mentioned to improve mobility conditions for these users. But what effect would this measure have on the safety of these users and on the safety of the other users with whom they share the traffic space? OBJECTIVE The objective of this study is to contribute elements to help answ...

Biextensions of 1-motives by 1-motives

Let S be a scheme. In this paper, we define the notion of biextensions of 1-motives by 1-motives. Moreover, if M(S) denotes the Tannakian category generated by 1-motives over S (in a geometrical sense), we define geometrically the morphisms of M(S) from the tensor product of two 1-motives M1⊗M2 to another 1-motive M3, to be the isomorphism classes of biextensions of (M1, M2) by M3: HomM(S)(M1 ⊗...

Birational motives, I: pure birational motives

In the preprint [19], we toyed with birational ideas in three areas of algebraic geometry: plain varieties, pure motives in the sense of Grothendieck, and triangulated motives in the sense of Voevodsky. These three themes are finally treated separately in revised versions. The first one was the object of [21]; the second one is the object of the present paper; we hope to complete the third one ...

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