Quadratic forms, generalized Hamming weights of codes and curves with many points

We use the relations between quadrics, trace codes and algebraic curves to construct algebraic curves over finite fields with many points and to compute generalized Hamming weights of codes.Comment: 14 pages, Plain Te

Tomato marchitez virus, a new plant picorna-like virus from tomato related to tomato torrado virus

A new virus was isolated from a tomato plant from the state of Sinaloa in Mexico. This plant showed symptoms locally known as `marchitez disease¿: severe leaf necrosis, beginning at the base of the leaflets, and necrotic rings on the fruits. A virus was isolated from the infected plant consisting of isometric particles with a diameter of approximately 28¿nm. The viral genome consists of two (+)ssRNA molecules of 7221 (RNA1) and 4898¿nts (RNA2). The viral capsid contains three coat proteins of 35, 26 and 24¿kDa, respectively. The abovementioned characteristics: symptoms, morphology, number and size of coat proteins, and number of RNAs are similar to those of the previously described tomato torrado virus (ToTV). Sequence analysis of the entire viral genome shows that this new virus is related to, but distinct from, ToTV and that these members of two obviously new virus species belong to the recently proposed plant virus genus Torradovirus. For this new virus, the name tomato marchitez virus (ToMarV) is proposed

Sensoria: An exploratory interdisciplinary framework for researching multimodal & sensory experiences

This paper describes the development and salience of an original and innovative interdisciplinary approach, Sensoria, that combines methods and techniques from social science and performance to address the methodological challenges of researching sensory/multimodal experiences. It sets out the core components and methodological principles that underpin the approach and uses an illustrative example to show how it can facilitate research on hard to access sensorial experiences, to access, understand and analyse people’s experiences and perspectives of touch, a highly tacit sensory mode. The paper discusses the methodological contribution and challenges of this approach to sensory research for social science and artistic practice and ‘more-than-representational’ research more generally. It concludes by making a case for more critical research spaces at the intersection of these disciplines to foster multi-dimensional research dialogues and to advance the exploration and understanding of the relationship between the sensory, social and the digital

The control of PVY in Dutch seed potato culture

Over the recent years Potato virus Y presents a growing problem in Dutch seed potato culture. In recent years a significant % of seed potato lots was de-classified due to PVY infections. This apparent increase in PVY infections was unexpected since no increase in field symptoms were observed and the numbers of aphids caught in the yellow water traps and high suction traps showed a clear decline over the last 10 years http://www.aab.org.uk/images/VIRO_CONF_PROG.pd

Intermolecular C-H activation with an Ir-METAMORPhos piano-stool complex: multiple reaction steps at a reactive ligand

Substrate activation by means of a reactive ligand is a topic of much interest. Herein we describe a stoichiometric anti-Markovnikov C-N bond formation involving ligand reactivity in multiple steps along the reaction coordinate, including ligand assisted substrate (de)protonation and C-N bond formation, as illustrated by a combined experimental, spectroscopic and computational study. This affords a highly unusual four-membered iridacycle bearing an exo-cyclic C=C double bond