Worker honeybees (Apis mellifera) carry out multiple tasks throughout their adult lifespan. It has been suggested that the insulin/insulin-like signalling pathway participates in regulating behavioural maturation in eusocial insects. Insulin signalling increases as the honeybee worker transitions from nurse to food processor to forager. As behavioural shifts require differential usage of sensor...

This paper incorporates costly migration into the empirical literature on the incidence on wages of states and local taxes. The responsiveness of pre-tax wages to changes in state and local taxes (including income, sales and property taxes) is shown to vary by age and education. Using repeated cross-section and pseudo-panel regressions, the paper shows that the pre-tax wages of highly-educated ...

BACKGROUND Methyl alcohol poisoning has been mainly reported in community. Two cases of methyl alcohol poisoning occurred in a small-sized subcontracted factory which manufactured smartphone parts in Korea. CASE PRESENTATION One young female patient presented with dyspnea and visual disturbance. Another young male patient presented with visual disturbance and myalgia. They treated with sodium...

Colquhoun, W. P., and Edwards, R. S. (1970). Brit. J. industr. Med., 27, 266-272. Circadian rhythms of body temperature in shift-workers at a coalface. The oral temperatures of a group of coalface workers were recorded daily at intervals during their period ofwork underground, over a three-week cycle of day, afternoon and night shifts. The basic mean circadian rhythm of temperature observed in ...

This article explores the obviational process through which the value of salaries is continuously being transformed, based on ethnographic fieldwork carried out among young road workers employed by a Chinese construction consortium to rehabilitate the N1 highway in the southern part of Mozambique. To the Mozambican workers, the value of salaries emerged by gradually dropping the traces of its o...

Since the 1897 report of Santessen, who observed aplastic anaemia among young women engaged in the manufacture of bicycle tyres in Sweden, and the report in the same year by LeNoir and Claude, who observed haemorrhaging in a young man engaged in a dry-cleaning operation in France, benzene has been known to be a powerful bone marrow poison. Similar reports of workers developing benzenerelated di...

Children around the world are working in hazardous or unsafe conditions and they are at risk to injury through manual labor and susceptible to poisoning due to chemical exposures in the work place. Because of their behavior and the developmental changes occurring throughout childhood and adolescence children are more vulnerable to injury. Often children work because of economic necessity, comin...

An increase in the share of youth in the working age population of one state or region relative to the rest of the United States causes a sharp reduction in that state’s relative unemployment rate and a modest increase in its labor force participation rate. This is inconsistent with many theories of the labor market, but can be easily explained by a model of frictional unemployment with on-the-...

The primitively eusocial wasp Ropalidia marginata shows an age-based division of labor in which workers allocate tasks according to their relative ages (age ranks). This age polyethism seems quite flexible because in colonies devoid of old workers, young individuals can perform the tasks normally performed by older workers. Social interactions appear to be a plausible mechanism by which workers...

Conclusions: We conclude that unemployment scarring also affects young adults with vocational credentials in a liberal labour market setting that otherwise allows for smooth school-to-work transitions. This finding runs counter to expectations that standardised vocational degrees, a liberal and flexible labour market structure, and predominantly short unemployment spells protect young skilled w...