A subset B of a closed convex set A is recession-compatible with respect to A if A can be expressed as the Minkowski sum of B and the recession cone of A. We show that if A contains no line, then there exists a recession-compatible subset of A that is minimum with respect to set inclusion. The proof only uses basic facts of convex analysis and does not depend on Zorn’s Lemma. An application of ...

One of the most common esthetic concerns associated with the periodontal tissues is gingival recession. Gingival recession is the exposure of root surfaces due to apical migration of the gingival tissue margins; gingival margin migrates apical to the cementoenamel junction. Although it rarely results in tooth loss, marginal tissue recession is associated with thermal and tactile sensitivity, es...

A macroeconometric model is used to examine possible causes of the 2008-2009 U.S. recession. The results suggest that about 30 percent of the recession so far (through 2008:4) is due to four unexplained shocks to the nondurable and durable consumption equations, 21 percent to the fall in equity wealth, 8 percent to the fall in housing wealth, 19 percent to import price shocks, and 22 percent to...

This paper studies the responses of unemployment in Germany, the United States and Britain to the Great Recession of 2008-09 by making use of Beveridge curve analysis, and in the entire OECD with other techniques. It is shown that Britain suffered from recession but no structural problems; the United States suffered from structural unemployment during the recovery; Germany exhibited a much bett...

Background: Apical shifting of marginal gingiva results into gingival recession whether occuring locally or in generalized form is a common and undesirable condition. Treatment results and prognoses of Miller's Class IV gingival recession defects using presently available surgical techniques are not satisfactory. The present case was done with aim and objective of establishing a new technique f...

In the summer of 2009, the U.S. economy began to emerge from its deepest recession since the 1930s. But today, more than two years later, conditions still aren’t much different from an economy actually in recession. Gross domestic product (GDP) growth was barely positive in the first half of 2011. The unemployment rate is 9.1 percent, much higher than anything we had experienced for decades bef...

Transformation of the glaciated isthmus between Sørkapp Land and the rest of Spitsbergen since 1900 is described. The landscape-seascape dynamics depends on the glacial recession determined by climate warming after the Little Ice Age (i.e., since the beginning of the twentieth century, and especially since the 1980s). The isthmus has been narrowed from 28 km in 1899-1900 to 6.2 km in 2013, and ...

Few industries have grown faster in recent years than the temporary help supply industry . Although still small in overall terms, with 735,000 workers representing less than one percent of total wage and salary employment in nonagricultural establishments in December 1985, the industry almost doubled in employment size in the 3 years since the trough of the recession in 1982 and accounted for 3...

In this paper we quantitatively investigate the boom and the bust of the Japanese economy during 1980–2000 using the business cycle accounting technique. This method helps us identify the distortion margins called ''wedges'' that played a significant role in accounting for the output fluctuations. Applying our model to Japan, we find that efficiency and investment wedges can almost wholly accou...

One of the most common esthetic concern associated with the periodontal tissues is gingival recession. Gingival recession is the exposure of root surfaces due to apical migration of the gingival tissue margins; gingival margin migrates apical to the cementoenamel junction. Although it rarely results in tooth loss, marginal tissue recession is associated with thermal and tactile sensitivity, est...