Bast fibres have been commonly used as a textile material in Northern Europe since Neolithic times. However, the process of identifying the different species has been problematic, and many important questions related to their cultural history are still unanswered. For example, a modified Herzog test and the presence of calcium oxalate crystals have both been used in identification. In order to generate more reliable results, further research and advancement in multi-methodological methods is required. This paper introduces a combination of methods which can be used to identify and distinguish flax (Linum usitatissimum), hemp (Cannabis sativa), and stinging nettle (Urtica dioica). The research material consisted of reference fibres and 25 fibre samples obtained from 12 textiles assumed to be made of nettle. The textiles were from the Finno-Ugric and Historical Collections of The National Museum of Finland. The fibre samples were studied by observing the surface characteristics and cross sections with transmitted light microscopy, and by using a modified Herzog test with polarized light, in order to identify the distinguishable features in their morphological structures. The study showed that five out of 25 samples were cotton, 16 nettle, one flax, and one hemp. Findings from two samples were inconsistent. The results show that it is possible to distinguish common north European bast fibres from each other by using a combination of microscopic methods. Furthermore, by utilizing these combined methods, new and more reliable information could be obtained from historical ethnographic textiles, which creates new vistas for the interpretation of their cultural history. 相似文献
This is Part 2 of a two-part study of how APOS theory may be used to provide cognitive explanations of how students and mathematicians
might think about the concept of infinity. We discuss infinite processes, describe how the mental mechanisms of interiorization
and encapsulation can be used to conceive of an infinite process as a completed totality, explain the relationship between
infinite processes and the objects that may result from them, and apply our analyses to certain mathematical issues related
to infinity. 相似文献
Public parks have been a familiar and popular feature of our towns and cities since their appearance throughout the 19th century. They arose out of social concern over public health and happiness and as a reaction to the squalid conditions endured by the masses. Civic pride determined that they were maintained to a very high standard as symbols of municipal power and excellence. Public parks were the first resort for local communities, especially children, to have fun and to relieve the pressures of modern life. As well as providing an urban pastoral they also provided for the exuberance of amatuer sport and lively play. They continued and strengthened the British fascination with horticultural magnificence ‐council apprenticeships provided the head gardeners for the National Trust and private estates as well as the men who competed with their peers in ever more imaginative and technically accomplished picture‐and carpet‐bedding displays which adorned the nation's premier public parks.
All this has sadly passed. The decline of parks can be traced back to the removal of railings for the War effort and consequent loss of sense of place, but the real damage became cumulative from the mid‐1970s. Local government reorganisation, political struggle between local and central government, privatisation of local services, year‐on‐year cuts in capital and revenue budgets and a shift of emphasis to foreign holidays and car‐borne countryside recreation all contributed to the downfall of urban parks into the dismal, neglected and vandalised landscapes which have become so familiar today. Responding to the concerns of voluntary and professional bodies, the Heritage Lottery Fund launched the Urban Parks Programme in 1996 to begin to address the issues. The Urban Parks Programme experience has highlighted how seriously underfunded parks have been and has committed far more money than intended to tackle the massive backlog of repairs to essential park infrastructure. It has also tried to address the causes of decline in partnership with local authorities and other bodies in the field ‐ loss of management structure and skills, lack of political support and understanding, and dearth of relevant data concerning parks.
This article traces the fortunes of public parks from their inception to their decline and documents the stirring of a potential renaissance as the government shows its concern with quality of life issues, with social exclusion, with multiple deprivation and with regeneration of the economic vitality and social coherence of urban areas. A government Select Committee has recently examined the state of the nation's parks and declared itself shocked and appalled at the extent of the problems that parks have faced in the last 30 years. There is now a chance that the long downward trend in the status and condition of urban parks can be reversed if a vigorous lead is given by government. 相似文献
Three librarians who have extensive experience working in libraries or for publishers, vendors, or consortia presented an informal discussion on librarian–vendor relationships. The audience was encouraged to participate. Problems were articulated; speakers and audience members contributed suggestions for better approaches or behaviors when handling difficult situations. 相似文献
This article presents a case of co-designed temporary learning spaces at a Finnish academic library, together with the results of a user-survey. The experimental development of the multifunctional spaces offered an opportunity for the library to collaborate with its parent organisation thus broadening the role of the library. Hence, library can be seen as a third player facilitating learning spaces. Additionally, the library's own expertise was strengthened through successful cooperation with the undergraduate students and other actors. The results support prior research, where studying in the library is target-oriented differing from other learning spaces in providing support and resources. 相似文献
Item bias on Forms A and B of the Boehm Test of Basic Concepts was examined for a sample of White and Mexican-American kindergarten children. The method employed to detect biased items, as defined by an items-by-group interaction, was a two-way analysis of variance with followup being conducted with a Bonferroni-type procedure. Bias-in-item difficulty occurred for both groups, which does not conform to the current popular press view that bias is against ethnic minorities and not against the White majority. The finding that on some items the Mexican-American group out-performed the White group indicates the need to examine carefully the question of bias and to reconsider popular conceptualizations of the many issues of bias in educational and psychological testing. 相似文献
The development of the intention to communicate was examined by attempting to identify the point at which prelinguistic vocalizations are used by infants as a means of communication. This achievement was related to the infants' cognitive development. It was hypothesized that Piagetian stage 5 in the development of causality may be a prerequisite for the intentional use of vocalizations. 46 infants (X age = 10.7 months, range: 8 months--14.3 months) and their mothers were videotaped in a structured, naturalistic setting. 2 "frustration" episodes were devised to encourage communication, and the infants' vocalizations as well as other behaviors were coded by 2 observers. 2 Piagetian tasks were selected to assess the causal developmental level of the child. A significant relationship between causal developmental level and the occurrence of intentional vocalizations was found. The results support the hypothesis that stage 5 causal development may be a prerequisite to the use of intentional vocalizations. 相似文献
