Goldblatt and Thomason’s theorem on modally definable classes of Kripke frames and Venema’s theorem on modally definable classes of Kripke models are generalised to coalgebras.

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Disease and non-battle injury (DNBI) rates were examined in conjunction with casualty rates across two Marine Corps operational scenarios, the assault on Okinawa and the Korean War. DNBI rates increased significantly with battle intensity among Marine infantry battalions involved in both operations. Highly significant positive correlations (p < 0.001) were evidenced between DNBI rate and wounde...

Protocorporatist West European countries in which economic interests were collectively organized adopted PR in the first quarter of the twentieth century, whereas liberal countries in which economic interests were not collectively organized did not. Political parties, as Marcus Kreuzer points out, choose electoral systems. So how do economic interests translate into party political incentives t...

The American military experience in World War I and the influenza pandemic were closely intertwined. The war fostered influenza in the crowded conditions of military camps in the United States and in the trenches of the Western Front in Europe. The virus traveled with military personnel from camp to camp and across the Atlantic, and at the height of the American military involvement in the war,...

Too often, the examination of the work of a major intellectual figure occurs in an historical vacuum. History has two meanings. One sense is obviously that of the social, political, and economic context within which a specific theoretical development takes place. Would Keynes have written The General Theory had England not suffered economic difficulties following World War I and had the capital...

Russell and Walker proposed different ways of constructing instants from events. As an explanation of “time as a continuum”, Thomason favoured Walker’s construction. The present paper shows that Russell’s construction fares as well. To this end, a mathematical characterization problem is solved which corresponds to the characterization problem that Thomason solved with regard to Walker’s constr...

This paper documents a migration response to the American Civil War. We compare men who served in the Confederate Army with their men who served in the Union army in the border state of Kentucky, which contributed significant numbers of soldiers to both armies. To create the dataset, we collected the universe of existing Union and Confederate enlistees from Kentucky and matched men to their pre...

Theodor Meyer’s 1908 doctoral dissertation, with Ludwig Prandtl (1875–1953) as his advisor, introduced much of what has now become basic gas dynamics: not only the Prandtl–Meyer expansion but also the oblique-shock-wave theory as well. It is arguably the most influential dissertation in all of fluid dynamics. Yet no biography or even a photograph of Meyer has been available in the intervening c...

1910 through the first year of World War I, were a period of shifting public health challenges and the emergence of a distinctive and cohesive Canadian approach to managing them. Driven by the vision and work of a fairly small group of dedicated public health leaders, this half-decade saw rapid growth of the Association, along with remarkably intense activity in the development of Cana-da's pub...