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Harvest experiments of wild crop relatives are essential for our understanding of the biology of wild plants embodied in the economy of ancient forager communities. Most of the previous experimental harvest reports spanned a single season and therefore are unable to address questions concerning long-term yield potential. Herein we report on six consecutive harvest seasons taking place at four sites in Israel that harbour wild pea populations: three typical Pisum fulvum sites and one typical Pisum elatius site. Three out of the four sites showed no indication of a decline in grain yield as a result of repeated harvest and the removal of a considerable portion of mature seeds. Site-specific factors seem to have a strong influence on the grain yield as no seasonal yield similarity was observed between adjacent and ecologically similar sites harbouring the same wild pea taxon. The erratic year-to-year wild pea yield we observed calls for a reassessment of the presumed role of grain legume species in Near Eastern hunter–gatherers' diet. Combined with published data on cultivation of wild pea, our results are inconsistent with models suggesting protracted domestication of Near Eastern grain legumes or with the preliminary attempts to apply Niche Construction Theory to the study of plant domestication in the Near East.  相似文献   
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Lea Goldberg served as a key literary taste-maker in the labor movement children's literature for a period of about 25 years, from the mid-1930s until the end of the 1950s. This essay focuses on the peak of her activities in this field, a period beginning in 1943 and ending around 1960. These were the years of her uncompromising struggle to establish a children's literary canon through Sifriyat Po'alim, the publishing house of Hashomer Hatza'ir and Hakibbutz Ha'artzi federation. The essay explores the strategies employed by Goldberg in her pursuit of a meaningful balance between two contrasting labor movement approaches towards the revolutionary role of children's literature: the “political” approach, which recruited children's literature in order to promote revolutionary kibbutz values; and the “poetic” modernist approach, which defined literature itself as revolutionary. By maintaining a dialectic tension between the two models of a revolutionary “literary beautiful,” Goldberg led a quiet revolution in the hegemonic labor movement children's literature of her time.  相似文献   
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This paper focuses on the characteristics of biotech firms that consider alliances as critical to the innovation and commercialization of biotech-based products. First, we consider alliances with both universities and industries. Next, we examine attributes for those firms who consider proximity to universities as critical compared with others that do not put high value on physical proximity. Our study is informed by the literature on the biotechnology industry as well as studies on absorptive capacity, alliances and clusters in exploration and exploitation of knowledge, research and technologies. We analyse data based on a 2002 survey of Canadian biotech firms and find that while collaborative arrangements with universities are the most common among our sample firms, those who assign a high value to such linkages are not necessarily always the biotech firms experiencing commercial success.  相似文献   
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Kuwait is a country in which there are many tribes but it is the al‐U'zam tribe which is very dominant and influential in local politics and the economy, in contrast to the other tribes in Kuwait who are recognized by the state as being equal, but have little influence in these things. The Bedouin tribes, such as the Bidun society in Kuwait, who have been excluded from nationality and citizenship and thus have no influence, are an exception. The Kuwaiti government claims that the Bidun themselves gave up these rights so as not to be part of the Kuwaiti state and this has resulted in the Kuwaiti government not granting them any formal economic, political, or social rights. Because of this, the Bidun have had to fight for their rights for decades since the formal establishment of an independent Kuwait in 1961. This article wishes to discuss whether the question of the Kuwaiti refusal to recognize the Bidun as citizens is because of geostrategic reasons, because of the fear of creating a precedent that might lead to the inclusion of other tribes into the Kuwaiti state, or because this is a traditional political strategy for dealing with politically weak tribes.  相似文献   
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