Modelling the use of the manager's time

This paper starts from two problems: the lack of use of queueing theory (and OR models in general) and the need for greater personal time effectiveness expressed by managers. The application of waiting line theory to the general managerial role is proposed and the most salient assumptions in such an application are explored. A simple example is undertaken which results in tentatively promising evidence. Further questions and possibilities are raised.     

Adaptive Cluster Sampling in Two‐stage Sampling

Adaptive cluster sampling can be a useful design for surveying rare and clustered populations. Here we present a new development in adaptive cluster sampling where we use a two‐stage design and extend the complete allocation sampling method. In the proposed new design the primary sample units are selected and, depending on the value of a preset condition, the entire primary unit is surveyed, as in complete allocation sampling. In the next step, if a second condition is met, the surrounding primary sample units are selected. We review the efficiency of the proposed design for sampling the New Zealand Castle Hill buttercups and provide unbiased estimators for the population total and sampling variance.     

A Tale of Two American Cities: Disaster,Class and Citizenship in San Francisco 1906 and New Orleans 2005

Destruction, notes David Harvey, “is often required to make the new urban geography out of the wreckage of the old.”² The history of San Francisco's Chinatown following the 1906 earthquake and fire and New Orleans' public housing following Hurricane Katrina in 2005 reveal how powerful class interests collude with the fog of disaster to lay claim to the urban spaces of the poor and marginal. In two historic U.S. disasters we witness the concerted efforts of urban elites to confiscate the spaces of two politically vulnerable populations: the Chinese in 1906 and low‐income African‐Americans in 2005. The widely varying outcomes of these two attempts reveal a good deal about the intersection of calamity, class, race, and citizenship in American history.     

Communicating Uncertain Science to the Public: How Amount and Source of Uncertainty Impact Fatalism,Backlash, and Overload

Public dissemination of scientific research often focuses on the finding (e.g., nanobombs kill lung cancer) rather than the uncertainty/limitations (e.g., in mice). Adults (n = 880) participated in an experiment where they read a manipulated news report about cancer research (a) that contained either low or high uncertainty (b) that was attributed to the scientists responsible for the research (disclosure condition) or an unaffiliated scientist (dueling condition). Compared to the dueling condition, the disclosure condition triggered less prevention‐focused cancer fatalism and nutritional backlash.     

Modern Multi-line Slot Machine Games: The Effect of Lines Wagered on Winners,Losers, Bonuses,and Losses Disguised as Wins

We simulated the commercially available multi-line slot machine game “Money Storm,” including its bonus wins. Our results show that after a specified amount of time (such as 1 or 50 h), when players played a single line, there were marked differences between one player and the next—a few won a lot, others lost far more than average. When playing 20 lines there were fewer big winners and fewer players quickly losing a large percentage of their money. We simulated a Gambler’s Ruin scenario whereby players arrived with $100 and made $1 wagers until broke. Again we saw a reduction in the variability among player as the number of lines wagered increased, fewer players lost their entire bankroll quickly, and fewer players had big wins. The bonus wins in Money Storm contribute approximately 24 % to the payback of the game, and our simulations of bonus wins shows that with 20 lines wagered the players spend approximately 11 % of their time in bonus wins. With one line wagered, there are no losses disguised as wins while with 20 lines wagered the majority of hits are losses disguised as wins. Players using multi-line machines can thus tune the characteristics of the machine gambling experience to match their preferred pattern, though most seem in practice to bet on the most possible lines. Our results serve to inform researchers, counsellors, gamblers and others about how slot machines are designed, and the effect that wagering on multiple lines has on short-term and long-term play, bonus wins, and losses disguised as wins.     

Inter‐parent Aggression as a Precursor to Disengagement Coping in Emerging Adulthood: The Buffering Role of Friendship Competence

Using multi‐informant data drawn from a prospective study involving 184 youth, mother‐perpetrated and father‐perpetrated partner aggression during early adolescence (the age of 13) was examined as a predictor of five types of disengagement coping strategies in emerging adulthood (the age of 21): behavioral disengagement, mental disengagement, denial, substance use, and restraint. The ability to develop close friendships, or friendship competence, was examined as a moderator of these links. Results suggest that inter‐parent aggression in early adolescence can predict reliance on disengagement coping 8 years later, but that friendship competence can buffer against the reliance on disengagement coping. Moreover, close friendship competence was not directly related to partner aggression by mothers or fathers, suggesting that friendship competence develops along an independent developmental track and thus may truly serve as a buffer for young adults with a history of exposure to inter‐parent aggression.     

Experiences of Biological Parents and Their Older Children in Out-of-Home Care for the First Time

This article will examine the parenting characteristics and challenges that faced a cohort of families participating in an exploratory qualitative research study. This study sought to describe the experiences and characteristics of parents whose children were placed in the child welfare system in early-to-late adolescence (ages 12–18), thus gaining an understanding of the parenting challenges faced as they were able to maintain their children in their homes for a significant portion of their lives. The families of older youths entering care for the first time described how alcohol and drug abuse impacted their relationships with children, significant others, jobs, and their mental health status. A significant issue that emerged in several of the cases were older children who initiated a report to child welfare themselves.     

‘SUBTERRANEAN PASSAGES OF THOUGHT’: EMPIRE'S INSERTS

Scattered throughout Hardt and Negri's Empire are a number of short sections whose manifesto-like energy contrasts with the relatively expository style of the main text. These passages, modeled after the scholie of Spinoza's Ethics, are meant to suggest new ways of thinking about material already presented, to highlight the affective aspect of the material, and to point to hidden connections among different discursive elements. Several of these which did not appear in the published version of Empire for reasons of space are published here for the first time. The matters touched on are as diverse as those in Empire itself: Totality as a philosophical problem, the gender of biopolitical production, the relationship between genocide and the nationstate, the possibility of hope; the paradoxes of unemployment, the function of fear, postmodern prophecy,Hollywood's imperial fantasy, and the paradoxical relationship between being-against and love that has puzzled and fascinated many of Empire's readers.     

Survival at work: flexibility and adaptability in American corporate culture

Using such business self-help bestsellers as Spencer Johnson’s Who Moved My Cheese?, Harvey Mackay’s Swim With the Sharks Without Being Eaten Alive and Kevin Kelly’s New Rules for the New Economy, this article analyses a recent trend in the American business world’s use of Darwinian discourse: the increasing centrality of two specific traits – flexibility and adaptability – to corporate ‘survival’ in the 1980s, 1990s and today. The article argues that this focus on adaptability and flexibility has two especially troubling implications: individuals may be compelled to adapt ceaselessly, and the problematic idea that one can survive or succeed through sheer individual will may become naturalized.     

The Use of Multizone Models to Estimate an Airborne Chemical Contaminant Generation and Decay Profile: Occupational Exposures of Hairdressers to Vinyl Chloride in Hairspray During the 1960s and 1970s

Vinyl chloride (VC) was used as a propellant in a limited percentage of aerosol hairspray products in the United States from approximately 1967 to 1973. The question has arisen whether occupational exposures of hairdressers to VC-containing hairsprays in hair salons were sufficient to increase the risk for developing hepatic angiosarcoma (HAS). Transient two-zone and steady-state three-zone models were used to estimate the historical airborne concentration of VC for individual hairdressers using hairspray as well as estimated contributions from other hairdressers in the same salon. Concentrations of VC were modeled for small, medium, and large salons, as well as a representative home salon. Model inputs were determined using published literature, and variability in these inputs was also considered using Monte Carlo techniques. The 95th percentile for the daily time-weighted average exposure for small, medium, and large salons, assuming a market-share fraction of VC-containing hairspray use from the Monte Carlo analysis, was about 0.3 ppm, and for the home salon scenario was 0.1 ppm. The 95th percentile value for the cumulative lifetime exposure of the hairdressers was 2.8 ppm-years for the home salon scenario and 2.0 ppm-years for the small, medium, and large salon scenarios. If using the assumption that all hairsprays used in a salon contained VC, the 95th percentile of the theoretical lifetime cumulative dose was estimated to be 52–79 ppm-years. Estimated lifetime doses were all below the threshold dose for HAS of about 300 to 500 ppm-years reported in the published epidemiology literature.