Team effectiveness under stress: a structural contingency approach

To examine whether working under stressful circumstances restricts or enhances team effectiveness, a structural contingency model for team effectiveness was tested by focusing on job structuring (mechanistic/organic structuring) as a key factor, which interacts with qualitative and quantitative stress on team attitude (team commitment) and outcomes (team effectiveness). Findings from 73 primary care teams indicated that mechanistic structuring for teams working under quantitative stress was positively associated with team commitment, which in turn fostered team effectiveness, whereas organic structuring for working under qualitative stress improved team effectiveness. Furthermore, team commitment mediated the relationships between stress and structuring and team effectiveness. These findings support a structural contingency model for improving team effectiveness under stress. Copyright © 2006 John Wiley & Sons, Ltd.     

Prenatal diagnostic testing for familial dysautonomia using linked genetic markers

Familial dysautonomia (FD), a recessively inherited disease, has been mapped to chromosome 9q31. Highly polymorphic dinucleotide repeat markers flanking the genetic locus and at the same genetic location have been identified. We describe the prenatal diagnosis of FD using linkage and linkage disequilibrium analyses with these markers. Twelve families were analysed for informativeness and of these, seven went on to have prenatal testing (a total of eight fetuses tested). All of these fetuses were predicted to be heterozygous unaffected (FD carriers). Seven fetuses have come to term and are normal. In the absence of a recombinant proband, a panel of three proximal and three distal markers is sufficient to provide informative flanking markers and an 87–96 per cent likelihood of a highly predictive test. In an additional family at 1:4 risk for FD, no DNA was available from the propositus. This family was analysed using linkage disequilibrium to the #18 allele of the tightly linked marker D9S58 in conjunction with linkage analysis using data from two unaffected children. Prenatal diagnosis in this family indicated an affected fetus.     

Relative power and influence strategy: the effects of agent/target organizational power on superiors' choices of influence strategies

The present study examined superiors' tendency to utilize different top–down influence strategies according to their evaluation of their own power relative to that of their subordinates. Four hundred and fifty‐five subordinates (schoolteachers) from different schools described the extent to which their superiors used each item of the influence strategy questionnaire to influence them, while their immediate superiors evaluated superior's power and subordinate's power. Overall, superiors tended to use soft and rational strategy more often than hard strategy. However, regarding the parameter of relative power, the results indicated that the agent's power, as well as the target's power, affected the superior's choice of particular influence strategy. The results suggest that power should be discussed in relative rather than absolute terms. Copyright © 2001 John Wiley & Sons, Ltd.     

EMPHASIS ON DISTRIBUTION: STRATEGIES FOR SMALL SCALE WATER RESOURCES DEVELOPMENT IN THAILAND1

This paper discusses strategies for the development of water resources, emphasizing the delivery of reliable water supplies, for both domestic and production purposes, to every village and to every farmer. This necessitates a shift of emphasis from the construction of large storage reservoirs to the construction, operation, and maintenance of water distribution systems capable of reaching the largest number of farms, and a shift from projects that benefit the few, to projects that benefit the many. Water distribution in this context takes on three interrelated meanings: a geographical meaning, a technical meaning, and an economic meaning. The geographical meaning focuses on the spatial distribution of the recipient population as a key to identifying the proper distribution of water projects in physical space. The technical meaning relates to the physical distribution of water through canal systems to the farmers' fields. The economic meaning refers to the equitable distribution of benefits from water projects. The paper provides an illustration of the need for an emphasis on distribution, using the state of development of water resources in northeast Thailand as an example, with a proposed program for the further development of these resources. The northeast, the poorest region in the country, has been recognized by the Government of Thailand as a priority area for accelerated regional development efforts.     

δ<Superscript>15</Superscript>N as a natural tracer of particulate nitrogen effluents released from marine aquaculture

The flow of particulate nitrogen from marine net pen fish farm effluents to the surrounding biofouling community was quantified by means of stable isotopes of nitrogen. Plastic mesh substrates were deployed at 8 m depth near a sea bream fish farm and at a nearby reference site in the northern Gulf of Aqaba (Red Sea) to assess whether natural fouling organisms could sequester substantial quantities of farm-derived particulate nitrogen waste. A mixing equation, incorporating differences in nitrogen stable isotope composition, δ¹⁵N, between particulate organic matter (“source”) and fouling organisms (“sink”) at the fish farm and reference site, was used to estimate the amount of farm-derived nitrogen that was incorporated by the fouling community. Among the conspicuous fouling organisms examined, sponges, tunicates and polychaetes showed greatest uptake of fish farm N, where the mean fractions of farm-derived N estimated over the 2-year period of observation were 19±7, 22±6 and 31±8% of total organisms’ N content, respectively, with maximal recorded seasonal values of 68, 85 and 57%, respectively. Mean N uptake by mixed fouling communities (conspicuous + cryptic organisms) was as much as fivefold higher than that calculated for the sum of conspicuous taxa, suggesting that the retention efficiency is greater in mixed than in mono-specific biofouling communities.     

The proficiency trap: how to balance enriched job designs and the team's need for support

The present study seeks to enlighten our understanding of ways to promote the performance of teams of professionals. Considering that job enrichment practices might block support for a team, and hence its performance, the study examined the moderating effects of cultural factors, namely individualism–collectivism and power distance, and the team leader's practices as a source of support in the job enrichment–team support relationship. Further, the study examined the mediating role of team support in improving the performance of professional teams. Results from 56 healthcare teams from different hospitals indicated that attempts to promote professionals' performance should consider at a minimum how to balance job enrichment practices and the team's need for support. The findings suggest that this balance could be achieved by emphasizing the support provided by the leader, and by strengthening the cultural values of low power distance and collectivism in the team. Copyright © 2004 John Wiley & Sons, Ltd.     

Sense‐making of employment: on whether and why people read employment advertising

This paper suggests a process of sense‐making of “employment“ and identifies employment ads to be useful agents in this process. It is suggested that individuals read ads in surveillance of the employment market in addition to reading them to search for employment vacancies. Employment ads are suggested to be a forum for organizational self‐presentation that offers current information about the employment exchange as it is viewed by employers. Two exploratory studies are presented to support the thesis. Study 1 is an inductive survey of people's reading of employment ads, showing that people read ads even if they are not looking for a job because they view ads as a source of insight about the employment environment. Study 2 reviews the content of employment ads, showing them to convey prevailing elements of the idea of employment, namely that employment is an exchange of employee skills and responsibilities for organizational intrinsic and extrinsic rewards. Recognizing the individual need for sense‐making of employment, and identifying employment ads as a source of information about employment, opens up a new area for research and practice on recruiting, organizational self‐presentation, and sense‐making. Copyright © 2006 John Wiley & Sons, Ltd.     

Individual variation of (S)-4-methyl-3-heptanone in heads of braconid wasp, Leiophron uniformis, and Pogonomyrmex ants indicates costs of semiochemical production

(S)-4-Methyl-3-heptanone is an alarm pheromone released from the mandibular glands in heads of harvester ants (Pogonomyrmex spp.). We used gas chromatography–mass spectrometry (GC–MS) to study the variation in amounts of this ketone among individual ants of a colony. P. barbatus contained about 2,000 ng per head, while only about half of this amount was found in heads of P. rugosus and P. californicus. Individuals of P. barbatus from three different nests contained rather uniform amounts of the alarm pheromone within each colony (16–30% coefficient of variation CV; normal distributions skewed left), but one nest under food stress had a significantly lower mean amount. In contrast, both sexes of a small braconid wasp Leiophron uniformis, a parasitoid of Lygus plant bugs, contained up to 10 ng of the same volatile enantiomer in their heads; and groups of either sex of the wasp exhibited normal distributions of quantities (64% CV, skewed right). The differences in the distributions between parasitoids and ants suggest that related members within a social ant colony may attempt to maintain a uniform level of ketone compared to independent variation in unrelated, solitary wasp individuals. When the wasp’s leg was grasped with forceps, it tried to escape and bite the forceps as it ejected (S)-4-methyl-3-heptanone (detected by solid phase microextraction, SPME, and GC–MS). Since adult wasps are nonsocial and feed only on nectar, their sharp piercing mandibles in combination with this escape/biting behavior indicate the ketone is used for defense rather than for an alarm function as in harvester ants. Costs of producing the semiochemical in wasp L. uniformis and ants P. barbatus and P. californicus are suggested since populations exhibited a significant linear increase in the amount of (S)-4-methyl-3-heptanone with an increase in body weight of individuals.     

Simple digestion procedure followed by the azomethine-H method for accurate boron analysis and discrimination between its fractions in wastewater and soils

Excess boron is a growing environmental problem. It often affects agricultural yields, where reuse of wastewater for irrigation is practiced. This problem raises the need for reliable, simple and economical methods to monitor boron concentrations in wastewater and soil extracts. One such method, the commonly used azomethine-H spectrophotometric method, suffers from color interference, originating from high concentrations of dissolved organic matter, when applied to many wastewater and agricultural soil extracts. Moreover, this method only quantifies free dissolved boron and lacks the ability to quantify boron that is adsorbed to either the dissolved organic matter or suspended solids that are present in the sample. This work suggests a modification of the standard azomethine-H method, in which the solution is digested with potassium persulfate prior to the standard procedure. We show that this pretreatment can overcome the color interference and lead to highly accurate and precise boron analyses in wastewater. In soil extracts, the boron concentrations obtained using the suggested procedure were better correlated to inductively coupled plasma (ICP) spectrometry results than those measured by the standard method, because whereas the standard method quantifies the free dissolved boron only, the modified method, like the ICP method, quantifies the total dissolved boron in the sample. Thus, the suggested modification can be used to quantify the respective distributions of free dissolved boron, boron adsorbed to dissolved organic matter and boron adsorbed to suspended solids in soil extracts and water samples.