The notion of m-regular system on the Hermitian variety H(n, q2) was introduced by B. Segre (Ann. Math. Pura Appl. 70:1–201, 1965). Here, three infinite families of hemisystems on H(5, q2), q odd, are constructed.

Nathalie Berger,a Bertrand Dubreucq,a François Roudier,b Christian Dubos,a and Loı̈c Lepinieca,1 a Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique–Agro-ParisTech, Saclay Plant Sciences, 78026 Versailles cedex, France b Institut de Biologie de l’Ecole Normale Supérieure, Centre National de la Recherche Scientifique Unité Mixte de Recherche...

considering the current upward drift in farm use all over the world, the russian agro-food market has immense possibilities to create such economic conditions under which the farming sector could develop dynamically. the increase in the grain production is of crucial importance for all agricultural branches. in this respect, the grain sector is russia’s strategically significant economic segmen...

In the last three decades we have experienced the first close-up exploration of the planets of the solar system. American, Russian, and (increasingly) European planetary space missions have now explored the atmospheres and environments of many different worlds, returning data with which we can begin to understand the Earth in its wider context as never before. The new discipline of Comparative ...

Clouds are essential for life to exist on earth due to their influential climatological impact. Clouds help control the radiation balance of the earth by reflecting incoming solar radiation, a cooling process; however, clouds also act as absorbers of terrestrial infrared radiation, a warming process. This dual role is a primary motive to examine the effects clouds have on the global climate. Qu...

The NASA/JAXA Tropical Rainfall Measuring Mission (TRMM) has been in operation for over 17 years since 1997. The length of TRMM is far shorter than those from ground observations, raising a question as to whether TRMM derived climatology products are good enough for research and applications. In this study, three climatologies derived from a blended product (the TRMM Multi-Satellite Precipitati...

I have just three minor comments. 1. I did not get a feeling for the significance of the results shown in Fig. 6 which show discrepancies between 3D and 2D magnetic field treatment of up to +/-7K in the tropics. This sounds a lot and makes me wonder if modelling from 2D is in fact useless for these higher channels. A question is how does this compare to variance with respect to climate in obser...

This paper discusses the state of European research in historical climatology. This field of science and an overview of its development are described in detail. Special attention is given to the documentary evidence used for data sources, including its drawbacks and advantages. Further, methods and significant results of historical-climatological research, mainly achieved since 1990, are presen...

Representation error arises from the inability of the forecast model to accurately simulate the climatology of the truth. We present a rigorous framework for understanding this kind of error of representation. This framework shows that the lack of an inverse in the relationship between the true climatology (true attractor) and the forecast climatology (forecast attractor) leads to the error of ...