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The last 20 years have witnessed the diffusion of regional innovation policies supporting networks of innovators. The underlying aim of these policies is to encourage firms, particularly small and medium-sized enterprises (SMEs), to undertake collaborations with organizations possessing complementary knowledge. Focusing on a set of SMEs that have participated, over time, in several innovation networks funded by the same regional government, the paper investigates how their relationships have evolved with respect to the following aspects: (i) reiteration of pre-existing relationships as opposed to experimentation with new relationships; (ii) collaboration with organizations possessing complementary rather than similar knowledge and competencies; (iii) creation of local relationships rather than experimentation with extra-local collaborations; (iv) reliance upon intermediaries to connect with other organizations. Our findings reveal that the involvement in these policy-supported networks changed the firms' relational patterns, leading them to collaborate with a wider variety of agents than those with whom they were linked before the policies. Sectoral heterogeneity had a negative effect on the probability of collaborating, while co-localization increased the likelihood of collaborating. Mutual involvement with intermediaries also had a positive effect. However, in the case of firm-to-university relationships only specialized intermediaries were likely to perform a positive role and, therefore, encourage networking.  相似文献   
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A collection of 592 individuals from the site of Semna South in Sudanese Nubia was studied for evidence of healed fractures of the skull and appendicular skeleton. The sample included 241 males, 239 females, 109 subadults and three adults for whom a sex could not be determined. Potential analytical and interpretive bias due to vagaries of preservation was quantified and examined. Almost 21% of the adults exhibited at least one healed fracture, while only two subadults showed such trauma. Rates of fractures, calculated for each bone, varied from a high of 17.9% for the cranium to a low of 0% for the right femur. Some fractures were likely caused by the physical environment, for example, falls along the rocky shores of the Nile. Other trauma, such as craniofacial fractures, found in both males and females, may have been due to interpersonal violence. The high rate of craniofacial trauma may indicate that this group experienced social stress which could have precipitated or intensified interpersonal violence. Copyright © 1999 John Wiley & Sons, Ltd.  相似文献   
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Reviews     
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This article focuses on two aspects related to fish and fishing. It first discusses the social context for the consumption of preserved and fresh fish, showing that generally consumption of certain types of fresh fish conferred status, whereas consumption of preserved fish, being more affordable, was attested across social strata. The article then moves on to examine the organisation of the ‘fishing industry’, specifically the relationship between fish-salting establishments and the fishermen who provided the fish. Although we have many literary, documentary, and archaeological sources for fish preservation and fishing techniques in classical antiquity, the fishermen engaged in large-scale fishing remain rather elusive.  相似文献   
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Book review     
Peter Bellwood. Prehistory of the Indo‐malaysian archipelago, xii, 370 pp. north ryde, nsw: academic press, 1985. £50.50 (paperback £30.50).  相似文献   
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The region of the Serra de l’Altmirant in southeastern Spain, through its upland location and its rocky and scrub landscape, is strongly perceived as marginal–this mainly in contrast with the nearby fertile coastal plains between Valencia and Denia, busy with orange and vine production especially. A progressive colonization of the lower part of the Serra by weekend homes is starting to counter this image of marginality, but at the same time such constructions threaten the residual archaeology of a different type of human upland exploitation, namely pastoralism and hunting. Abandoned terraces, cisterns, store buildings and larger corrals are evident even on the exposed plateau and testify to a period in which the Serra was active and integral to farmers and shepherds from the villages of the adjoining valleys and plains. This paper discusses the nature of this activity, as recorded through archaeological and ethnographic investigation, and considers also the materials and outlook of Manolo, the last shepherd-in-residence on the Serra.  相似文献   
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This paper presents the outcomes of sidescan sonar and archaeological diving surveys in 2015 of two wrecked vessels located off Flotta Island, Orkney, North Scotland. Archival research indicates these are the remains of Anti‐Torpedo Close Protection Pontoons (ATCPP), an experimental protection device used for close protection of naval vessels at anchor in Scapa Flow from attack by aircraft‐launch torpedoes. The pontoons were only in operation in Scapa Flow for 13 months (March 1941–April 1942) and few were brought into service. As such they represent a rare heritage resource, for which very little is known about their operation.  相似文献   
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