Middlemen and Ruokakori, one solution for the local supply

Many food producers and institutional kitchens are positive about using locally produced food products in their kitchens nowadays. Despite this good will, there is often a lack of good practice. This paper presents an example of good practice. It identifies the main obstacles to using local food products - difficulties in finding producers and problems in the supply of suitable products - and how these have been overcome

Where Art Thou? Regional Distribution of Culture Workers in Finland

This study seeks to shed light on the regional distribution of culture workers in Finland. What factors – if any - make the location decisions of culture workers different from that of others? This study uses a rich micro level data for an application of multinomial logit model. The data is from the Finnish Longitudinal Census File and it contains information e.g. on individual's personal charactersitics, family characteristics and working life characteristics. The estimation results show that being a culture worker is an important factor in locational choice: the coefficient of living in a metropolitan area compared to rural areas is highly positive. According to the estimated marginal effects, the likelihood of living in a metropolitan region increases as much as 22 percentage points if the person is a culture worker. Another interesting notion is that the residential choices of cultural entrepreneurs seem to differ from that of other entrepreneurs.

Triangular hyperbolic buildings

We construct triangular hyperbolic polyhedra whose links are generalized 4-gons. The universal cover of those polyhedra are hyperbolic buildings, which appartments are hyperbolic planes tesselated by regular triangles with angles $\pi/4$. Moreover, the fundamental groups of the polyhedra acts simply transitively on vertices of the buildings

Hyperbolic triangular buildings without periodic planes of genus two

We study surface subgroups of groups acting simply transitively on vertex sets of certain hyperbolic triangular buildings. The study is motivated by Gromov's famous surface subgroup question: Does every one-ended hyperbolic group contain a subgroup which is isomorphic to the fundamental group of a closed surface of genus at least 2? Here we consider surface subgroups of the 23 torsion free groups acting simply transitively on the vertices of hyperbolic triangular buildings of the smallest non-trivial thickness. These groups gave the first examples of cocompact lattices acting simply transitively on vertices of hyperbolic triangular Kac-Moody buildings that are not right-angled. With the help of computer searches we show, that in most of the cases there are no periodic apartments invariant under the action of a genus two surface. The existence of such an action would imply the existence of a surface subgroup, but it is not known, whether the existence of a surface subgroup implies the existence of a periodic apartment. These groups are the first candidates for groups that have no surface subgroups arising from periodic apartments

Multi-view Metric Learning in Vector-valued Kernel Spaces

We consider the problem of metric learning for multi-view data and present a novel method for learning within-view as well as between-view metrics in vector-valued kernel spaces, as a way to capture multi-modal structure of the data. We formulate two convex optimization problems to jointly learn the metric and the classifier or regressor in kernel feature spaces. An iterative three-step multi-view metric learning algorithm is derived from the optimization problems. In order to scale the computation to large training sets, a block-wise Nystr{\"o}m approximation of the multi-view kernel matrix is introduced. We justify our approach theoretically and experimentally, and show its performance on real-world datasets against relevant state-of-the-art methods