Water supply—the case for joint planning

The waterwheel furnished the first mechanical power. It was en vogue, many centuries ago, in England, Holland and Italy—for flourmilling, textiles, iron, beer, paper and other ‘industries’. In the 18th century, potteries, spinning and weaving operations used watermills and water turbines.Although in that original function water went by and large out of fashion, it still plays a vital role in industry— in cooling, steam generation, steeping, processing, cleaning, etc. Industry stands indeed in the limelight of the water crisis, because in addition to being the second most important consumer of water (after agriculture), industry is the world's foremost water polluter. The present and future supply of and demand for water are therefore of immediate interest to industry.     

Untersuchung der autoritären Einstellung bei ungarischen StudentInnen

We asked daytime university and college students to complete the survey, which aimed at examining the authoritarian attitude of those questioned, and the factors in connection to it. The questionnaire was made up of 23 statements, and those questioned had to express how far they agree on a five grade scale (N = 349). On the basis of the answers it could be stated that the different groups of those planning to work in different fields differ from each other also from the point of view of accepting authority: from those groups which were examined in greater numbers the physical education teachers and the theologians were the most authoritarian, while the social workers and students of human studies were the least. Those answering differed also in terms of religiousness: those considering themselves religious and close to the church seemed to be the most authoritarian and those who are not religious the least. The results were interestingly coloured by the fact that in assessing specific social situations the social workers and the convinced non-religious ones showed signs of more authoritarian attitude. Results also proved that the own opinion about authoritarianism is related to the opinion of the parents. Beside many other questions we also examined whether authoritarianism is related to the situation when someone is stricter to him/herself and to those emotionally closer than to others.     

Preliminary observations on habitat, support use and diet in two non-native primates in an urban Atlantic forest fragment: The capuchin monkey (Cebus sp.) and the common marmoset (Callithrix jacchus) in the Tijuca forest, Rio de Janeiro

Space is an important dimension of the ecological niche. Differentiation in the use of vertical strata of the forest is related to species body size, and explains in part species coexistence at a local scale. Large neotropical primates dwell in the canopy, moving quadrupedally on large branches, whereas smaller species leap between narrow branches in the understory. We tested this general pattern by observing focal individuals of the capuchin monkey (Cebus sp.) and the common marmoset (Callithrix jacchus), both non-native species, living in a forest fragment within the Rio de Janeiro city. Results were in accordance with the pattern for neotropical primates. Vertical use of the forest seems to be related with ecological interactions, especially for C. jacchus restricted to the lower strata due to aerial predation. Preliminary observations on diet corroborate the omnivory of Cebus and the gum feeding characteristic of C. jacchus. For Cebus sp. the exotic jack-fruit (Artocarpus heterophyllus) was the most important food item. Predation of both primates on vertebrates, especially by C. jacchus on passerines, could cause an uncommon impact on prey populations. In spite of anthropogenic impact, these non-native primates maintain the general pattern of habitat, support use and diet of the same or similar species in native neotropical communities.     

Large deviations of multiclass M/G/1 queues

Consider a multiclass M/G/1 queue where queued customers are served in their order of arrival at a rate which depends on the customer class. We model this system using a chain with states represented by a tree. Since the service time distribution depends on the customer class, the stationary distribution is not of product form so there is no simple expression for the stationary distribution. Nevertheless, we can find a harmonic function on this chain which provides information about the asymptotics of this stationary distribution. The associated h‐transformation produces a change of measure that increases the arrival rate of customers and decreases the departure rate thus making large deviations common. The Canadian Journal of Statistics 37: 327–346; 2009 © 2009 Statistical Society of Canada     

Preparing for business model change: the “pre-stage” finding

The purpose of this paper is to investigate managers’ initiatives in the context of an emergent technology and their effect on the business models of firms. Building on four case studies of organizations interested in using an emergent technology for commercial purposes, this study applies a process-based framework of business model change. The main finding is that managers’ initiatives occur in the context of a “pre-stage” of potential business model change, which includes processes of experimenting and learning. The pre-stage finding gives a better understanding of when change initiatives affect a business model and when they do not, allowing managers to adopt a more proactive behaviour and guide their organizations towards effective business model change. The main contribution of this paper is to suggest the inclusion of the pre-stage idea in research and practice, since it is an intermediary step in the process of business model change that has been overlooked.     

Star list chromatic number of planar subcubic graphs

A proper coloring of the vertices of a graph G is called a star-coloring if the union of every two color classes induces a star forest. The graph G is L-star-colorable if for a given list assignment L there is a star-coloring π such that π(v)∈L(v). If G is L-star-colorable for any list assignment L with |L(v)|≥k for all v∈V(G), then G is called k-star-choosable. The star list chromatic number of G, denoted by $\chi_{s}^{l}(G)$ , is the smallest integer k such that G is k-star-choosable. In this paper, we prove that every planar subcubic graph is 6-star-choosable.     

Pride and prejudice: employment discrimination against openly gay men in the United States

This article presents the first large-scale audit study of discrimination against openly gay men in the United States. Pairs of fictitious résumés were sent in response to 1,769 job postings in seven states. One résumé in each pair was randomly assigned experience in a gay campus organization, and the other résumé was assigned a control organization. Two main findings have emerged. First, in some but not all states, there was significant discrimination against the fictitious applicants who appeared to be gay. This geographic variation in the level of discrimination appears to reflect regional differences in attitudes and antidiscrimination laws. Second, employers who emphasized the importance of stereotypically male heterosexual traits were particularly likely to discriminate against openly gay men. Beyond these particular findings, this study advances the audit literature more generally by covering multiple regions and by highlighting how audit techniques may be used to identify stereotypes that affect employment decisions in real labor markets.     

Bread in the Economy of Qualities: The Creative Reconstitution of the Canada‐UK Commodity Chain for Wheat

This article traces the creative reconstitution of the Canada‐UK wheat‐bread commodity chain since the 1990s. In the mid‐1990s, the Canadian Wheat Board (CWB) and a British bakery, Warburtons, pioneered an innovative identity‐preserved sourcing relationship that ties contracted prairie wheat growers to consumers of premium bread in the United Kingdom. The CWB‐Warburtons contract is emblematic of the increasing importance of quality claims, traceability, and private standards in the reorganization of agrifood supply chains. Yet the case is unique in two important ways. First, in the context of supermarket leadership in the coordination of quality chains, the program was established by two unlikely actors—a state marketing agency and a branded food manufacturer. Second, the quality chain centers on a semifresh, manufactured food staple (bread), whereas most quality chains are organized around fresh produce, meat, and dairy products. The CWB‐Warburtons story thus provides evidence of diversity and complexity in the shift toward the supermarket‐driven “economy of qualities.” I interpret these changes by locating them in broader processes of historical change. Led by the CWB and Warburtons, the shift toward quality in commodity chains for wheat bread is reconfiguring relations among key social actors in the prairie wheat economy as well as the UK bread market.     

A new mixed first-order integer-valued autoregressive process with Poisson innovations

AStA Advances in Statistical Analysis - Integer-valued time series, seen as a collection of observations measured sequentially over time, have been studied with deep notoriety in recent years, with...