the aim of this study was to investigate and to compare customers' loyalty in private and public sport clubs of tehran with a descriptive survey and field method. the statistical population of the study included customers of sport clubs in tehran who had participated in sport activities for at least 6 months. based on cluster sampling method, 4 regions out of 22 regions from tehran were ra...

The 2005 American Housing Survey reveals that 11% of residents on the west coast of the USA live in gated communities. The trend is not confined to America: just about all new housing built in China over the last 10 years is gated, with neighbourhood walls, guards, owner-governance structures, fees and neighbourhood management and investment plans based not on the municipal government model but...

We present a technique for destroying stationary subsets of Pκκ using partial square sequences. We combine this method with Gitik’s poset for changing the cofinality of a cardinal without adding bounded sets to prove a variety of consistency results concerning saturated ideals and the set S(κ, κ+). In this paper we continue our study of consistency results concerning the set S(κ, κ) = {a ∈ Pκκ ...

We study combinatorial principles known as stick and club. Several variants of these principles and cardinal invariants connected to them are also considered. We introduce a new kind of side-by-side product of partial orderings which we call pseudo-product. Using such products, we give several generic extensions where some of these principles hold together with ¬CH and Martin’s Axiom for counta...

A journal club is a group of individuals who meet regularly to discuss publications that are relevant to their professional interests; the term is also used to describe such a meeting. The earliest mention of a journal club that I have found is in an 1854 paper by Sir John Forbes in The Association Medical Journal, which was published between 1853 and 1856, and was a forerunner of the BMJ. The ...

In many applications common in testing for convergence the number of cross-sectional units is large and the number of time periods are few. In these situations tests which are founded upon an omnibus null hypothesis are characterised by a number of problems. In this paper we consider a broad class of tests of convergence based on multivariate time series and panel data methodologies, and track ...

We develop a theory of double clubs which extends Kelly’s theory of clubs to the pseudo double categories of Paré and Grandis. We then show that the club for symmetric strict monoidal categories onCat extends to a ‘double club’ on the pseudo double category Cat of ‘categories, functors, profunctors and transformations’.

Clubs are generalizations of cliques. For a positive integer s, an s-club in a graph G is a set of vertices that induces a subgraph of G of diameter at most s. The importance and fame of cliques are evident, whereas clubs provide more realistic models for practical applications. Computing an s-club of maximum cardinality is an NP-hard problem for every fixed s ≥ 1, and this problem has attracte...