Umbilicaria ahtii sp. nov. is described based on morphological and molecular characters. The new species resembles Umbilicaria vellea but the former has larger and submuriform ascospores, a darker lower surface, longer dark brown to black rhizinomorphs, and lacks thalloconidia directly on the lower surface and basal part of the rhizinomorphs. Phylogenetic analyses (ITS, mtLSU and RPB2) confirmed the distinctness of U. ahtii and indicated its sister relationship to U. meizospora. Umbilicaria ahtii is described from Finland and is currently known from several localities in Northern Europe (Svalbard, Norway, Finland, Kola Peninsula in Russia), Asia (Kodar Range, Siberia) and North America (Alaska). Within the U. vellea group, new molecular data confirmed U. koidzumii as a widespread, separate species sister to U. cinereorufescens. Diagnostic traits and variability of species, as well as their distribution patterns and nomenclature, are discussed.

This paper studies the process of labour market formation in the tourism industry in Spain. Results show that tourism regions diverged in their capacity to attract local labour, a factor that led to different compositions of the workforce. In the most dynamic regions, circular migration became a key factor as a result of housing shortages, seasonality and labour policy. Tourism agents promoted these flows by different mechanisms such as recruitment at origin and temporary accommodation. Migration benefited growth of firms, natives' upward mobility and migrants' accumulation of capital. However, inequality in the regional labour market and host society increased.

The early decades of the twentieth century witnessed a far-reaching growth in empirical exercises designed to measure the cost of living. Brazil was no exception to this movement, and the first studies of this nature for that country surfaced between 1935 and 1939. Among these, three deserve special attention for the soundness of their construction. These are the exercises of Horace Davis, Samuel Lowrie, and Bruno Rudolfer, professors of the Free School of Sociology and Politics of São Paulo, which investigated the cost of living in connection with the pursuit of a proper minimum wage in Brazil. The aim of this article is to revisit their pioneering efforts to measure the cost of living and to indicate how these studies touched upon the search for a minimum wage in Brazil.

The petitioners proposed to erect a large sculpture of the head of Oscar Wilde by Sir Eduardo Paolozzi in a public park, which was subject to the faculty jurisdiction because it had once been a detached burial ground for St Luke's, Chelsea.

Aviation employees operate in a dynamic, complex safety-critical system that is filled with uncertainty, requiring quick and correct expert decision-making. The purpose of this study is to investigate the decision-making indicators among aviation employees. Fifty-five technical engineers and air traffic controllers participated in this study by completing the Cambridge Gambling Task (CGT) at one of Iran’s airports. The CGT provides one of the most reliable and widely used decision-making assessment tasks and related indicators, including decision-making quality, risk-taking, delay aversion, deliberation time, risk adjustment and overall bet ratio. Higher risk adjustment, less deliberation time, and a lower delay aversion index resulted in better decision-making quality. Higher risk-taking does not necessarily mean lower self-control. No significant differences were observed between the studied groups, including between air traffic controllers (both Ground and Tower vs. RADAR and Approach) and between air traffic controllers and technical engineers in the CGT performance. The decision-making quality increased with age and work experience, which has important implications for training and selection processes.

This essay argues that emerging scholar and artist Anna Maria van Schurman (1607–78) disseminated her 1633 engraved self-portrait as a bid to enter the Republic of Letters and add her voice to the Europe-wide debate on women’s intellectual equality. To assess the portrait’s significance, I examine its sociocultural and artistic complexities, as well as its effect on two elite viewers, poet and diplomat Constantijn Huygens (1596–1687) and Neo-Latin poet Caspar Barlaeus (1584–1648). I conclude that although Van Schurman was unable to control the responses to her self-portraiture, its circulation afforded a crucial inflection point in her life’s journey, both outward and inward.

This article provides a new framework for understanding sexuality in Erasmus. It examines his correspondence with the monk Servaas Rogerszoon and with other familiars, making a critique of the use of letters for life writing before and after P. S. Allen’s edition. It discusses monastic contexts, especially within the Augustinian order, and humanist knowledge of same-sex values in Greek and Latin philology. Moving beyond biography, it recreates discourses of same-sex practice in the “Adagia.” In placing the letters and adages within a domain of queer studies, it demonstrates for the first time the existence in Erasmus of a private coterie language of sex.

A long standing conjecture states that the ropelength of any alternating knot is at least proportional to its crossing number. In this paper we prove that this conjecture is true. That is, there exists a constant $b_0 \gt 0$ such that $R(K)\ge b_0Cr(K)$ for any alternating knot K, where R(K) is the ropelength of K and Cr(K) is the crossing number of K. In this paper, we prove that this conjecture is true and establish that $b_0 \gt 1/56$.