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1.
Kuhn's GIUR is a set of measurements taken on a resharpened stone flake's edge. Its purpose is to estimate the amount of stone removed before the exhausted tool was abandoned. An experimental test of Kuhn's Index led Hiscock and Clarkson to suggest that it is an excellent estimator of flake mass loss. Our own tests, using different experimental procedures, reached much less optimistic conclusions. Here, we apply their own measurement procedures, and successfully duplicate their results. It does not follow, however, that our now-consistently high correlations have a causal connection. As GIUR values increase, they are less able to estimate the actual loss of flake mass. It appears, therefore, that incremental loss of flake mass need not be the sole driver of the GIUR value. If the correlation is an inevitable byproduct of the experiment's design, as it now appears, then analyses based on this high correlation will be misleading. The GIUR remains, however, and excellent gauge of flake edge exhaustion.  相似文献   

2.
There is no ambiguity in the existing empirical support for a GIUR as a robust predictor of mass lost from flakes through unifacial retouching. We demonstrate why the GIUR is a reliable method for inferring mass loss, in appropriate circumstances, and why it is a more powerful predictor of mass loss than touted competitors. We explain why Eren, M.I., Sampson's, G. [2009. Kuhn's geometric index of unifacial stone tool reduction (GIUR): does it measure missing flake mass? J. Archaeol. Sci.] arguments are faulty and why researchers should use the GIUR in preference to other methods of estimating the extent of unifacial retouch.  相似文献   

3.
The article discusses Thomas S. Kuhn's impact on the history of science, especially in the United States of America. First, the state of the history of science in the fifties is sketched. Second, Kuhn's particular contribution to the emerging new historiography of science is presented. Third, Kuhn's role in the m‐stitutionalization of the history of science in the USA is considered. Finally, some remarks are made on the relation between Kuhn's historiographic work and his book The Structure of Scientific Revolutions.  相似文献   

4.
In this paper, we given an economic interpretation of Kuhn's dual of the Steiner-Weber problem. It depends essentially on the notion that different transportation systems arerelevant for the primal and the dual. Moreover, the Euclidean metric underlies the interpretation of the primal, the block one that of the dual.  相似文献   

5.
Abstract

In Finnish archaeology, the hunter-gatherer Stone Age has generally been viewed as a peaceful period. Here we argue that this view is based on anachronistic understanding of the nature of war. Building on Thomas Kuhn's concept of paradigm as applied to the study of war, we examine the interpretations given to an enigmatic group of Subneolithic (ca. 3500–2000 cal. BC) megastructures located in Northern Ostrobothnia, Finland. Although generally interpreted as being related to sealing or a "symbolic" function, a defensive purpose emerges as a more probable interpretation.  相似文献   

6.
Revision in history is conventionally characterized as a linear sequence of changes over time. Drawing together the contributions of those engaged in historiographical debates that are often associated with the term “revision,” however, we find our attention directed to the spaces rather than the sequences of history. Contributions to historical debates are characterized by the marked use of spatial imagery and spatialized language. These used to suggest both the demarcation of the “space of history” and the erasure of existing historiographies from that space. Bearing these features in mind, the essay argues that traditional, temporally oriented explanations for revision in history, such as Thomas S. Kuhn's Structure of Scientific Revolutions, miss the mark, and that a more promising line of explanation arises from the combined use of Michel Foucault's idea of “heterotopias” and Marc Augé's idea of “non‐places.” Revision in history is to be found where writers use imagery to move readers away from rival historiographies and to control their movement in the space of history toward their desired vision. Revision is thus associated more with control than with liberation.  相似文献   

7.
ABSTRACT This research tests the ability of six metropolitan‐level measures of housing costs to predict a benchmark housing cost measure based on Aten's area price level index. The first four measures are calculated with U.S. Census Data, the fifth is based on HUD Fair Market Rents, and the sixth is the housing portion of the ACCRA Index. In 25 large metropolitan areas, the fourth measure predicts 86 percent of the variation in the benchmark index in 1990 and 85 percent in 2000. The fifth measure performs nearly as well. The paper concludes both are promising measures of living costs.  相似文献   

8.
Ever since Thomas Kuhn's influential The Structure of Scientific Revolutions (1962), textbooks have suffered a bad reputation. They have been accused of distorting—at times purportedly—history and of feeding students with an unacceptably simplified and optimistic view of science. This attitude started to change only in recent times. With the increase of attention paid not only to how theories are conceived, but also how they are practiced, disseminated, and appropriated, historians have rehabilitated textbooks as a legitimate site of knowledge production. In this paper, I adopt textbooks as an instrument to unfold multiple facets of the culture that allowed quantum physics to flourish between 1900 and the early 1930s. I organize the article around two stories about two major textbooks, i.e., Sommerfeld′s Atombau und Spektrallinien and Dirac′s Principles of Quantum Mechanics. I explore the complex pedagogical cultures underlying these two masterpieces and how they intersect local agendas.  相似文献   

9.
Moran's Index for spatial autocorrelation and localized index for spatial association have been widely applied in many research fields as the first step to explore and assess the spatial dependency in a set of geographic events. This article presents extensions to the equations for calculating global and localized spatial autocorrelation so to include the temporal attribute values of the geographic events being analyzed. The extended equations were successfully implemented and tested with a real world data set. In addition, simulated data sets were used to reveal how the extended equations performed. Beyond the usefulness of the extended equations, we suggest that care be taken with regard to assessing spatiotemporal patterns under the normality and randomization assumptions as different outcomes from different assumptions would require different approaches for interpretation.  相似文献   

10.
In the past 50 years, a marked reduction has occurred in European and North American children's freedom of movement and outdoor play. Using a structural equation model, the present study investigates the interaction between personal, environmental, and psychosocial factors that affect children's independent mobility. The study involved 313 mothers of 8–10-year-old Italian children. The results supported the hypothesized model: the age of the child, the maternal perception of social danger, and positive potentiality of outdoor autonomy were the most influential variables on children's independent mobility, measured as an index. Further, the maternal perceptions mediated the influence of the other demographic, psychosocial, and environmental variables on independent mobility.  相似文献   

11.
In 1312, the Swedish dukes Erik and Valdemar Magnusson married the Norwegian princesses Ingeborg Haakonsdaughter and Ingeborg Eriksdaughter at a ceremony in Oslo, Norway. In 1313, the two couples were reunited at a purpose-built banquet hall, believed to have been located in the medieval Swedish town of Lödöse. The main source of information concerning these events is the Swedish medieval rhyme chronicle The Chronicle of Duke Erik. However, a closer reading of the chronicle reveals that Lödöse is never mentioned in relation to the banquet hall. The article discusses the passing down of knowledge through generations of the same professional collective, in this case the professional collective of Swedish historians during the twentieth century, and demonstrates how the validity of once-established prescientific knowledge persists. To achieve its goal, the article applies Ludwik Fleck's terms “thought collective,” “thought style,” and “tenacity in science,” as well as Thomas Kuhn's concept of the “paradigm,” to a historiographical case study of how the proto-idea of the banquet hall being located at Lödöse has survived to become an established scientific fact. The location of the banquet hall concerns but a minor detail in the turbulent political situation of the Swedish kingdom during the first decades of the fourteenth century. However, the continuing reiteration of this minor detail is evidence of a larger phenomenon, namely how contemporary historical research is influenced by scholars in the prescientific past.  相似文献   

12.
A noted British economist and analyst of current developments in Russia investigates that country's competitiveness in global merchandise export markets by seeking to determine its trade specialization and comparative advantage in a global context. In search of consistent trends, the author compares Russia's scores in 2000 on the Balassa Index of Revealed Comparative Advantage with those of 2004, and also for that year with a selected list of international competitors (Brazil, India, China, Turkey, and the United States) as well. He then discusses recent (through June 2006) government efforts to stimulate export growth in sectors currently underrepresented in Russia's trade profile and assesses prospects for improvement in the balance of Russia's export profile. Journal of Economic Literature, Classification Numbers: E20, F14, F40. 7 tables, 20 references, 1 appendix.  相似文献   

13.
Children's independent mobility (IM) lacks a standardised definition and measurement protocol. Interactive mapping applications can capture geographically defined mobility data. In this study of 219 children, independent parental licences (IM Licence) and allowances to travel to certain locations unsupervised (IM Index) were collected through a questionnaire, and compared to IM-roaming areas derived from the Visualisation and Evaluation of Route Itineraries, Travel Destinations, and Activity Spaces (VERITAS-IM) mapping application. Significant relationships were found between the VERITAS-IM-derived measures and traditional measures of IM (IM Licence and IM Index). Results suggest the perceived degree of children's IM is heavily dependent on the assessment method and a combination of methods should be considered.  相似文献   

14.
We have analyzed the mid-to-late 20th century instrumental record of winter and summer temperatures and precipitation for six stations representative of Newfoundland subregions and of central and coastal Labrador. In addition, these modern records have been extended into the 1800s by using portions of records from Belle Isle and the city of St. John's. For these two lengthier records, several ‘epochs' of alternating relatively high or low characteristic temperatures are distinguished, particularly for the winter season. The modern (post-1940) temperature records show that the mid-century warm period has been succeeded by a significant shift to predominantly colder winters over this entire region since about 1972. A concurrent decline in summer temperatures is restricted to Labrador and north-central parts of the island. With respect to other studies of recent climatic trends over northeastern Canada and the northwest Atlantic, our results demonstrate a significant correlation, at most of our study locations, between mean winter temperature and seasonally averaged values of the North Atlantic Oscillation (NAO) and the Baffin Island-West Atlantic Index (BWI). Comparative examination of the precipitation record for these stations also reveals subregional scale contrasts in the degree of variability and trend for annual and seasonal totals. For St. John's, representative series of total precipitation spanning the past century are analyzed for winter and summer; these series lack significant lengthy trends, although short-term precipitation variability is to some degree associated with the mean temperatures of the defined epochs. Since the 1940s, significant upward trends in total amounts and frequencies characterize the southwestern coast of the island for both winter and summer, and eastern Labrador in summer. The increased winter snowfall observed on the southwest coast during the past three decades is considered to be linked to a greater frequency of onshore synoptic airflow patterns accompanying the trend to predominantly positive winter NAO Index within this period. Nous avons analysé les relevés instrumentaux des températures hivernales et estivales et des précipitations qui ont eu lieu du milieu à la fin du 20ème siècle dans six stations représentatives des régions de Terre-Neuve ainsi que du Labrador central et côtier. De plus, nous avons pu adapter ces relevés récents au 19ème siècle en nous servant de relevés de Belle Isle et de la ville de St. John's. Dans ces deux groupes de relevés plus longs, on distingue plusieurs «époques » qui représented des températures caractéristiques (1) relativement hautes et (2) relativement basses - surtout en hiver. Les relevés récents de températures (après 1940) indiquent que la période chaude du milieu de siècle a été suivie par un changement remarquable caractérisé par des hivers plus froids depuis 1972 et dans toute la région. Une baisse simultanée des températures estivales se limite au Labrador et aux régions du centrenord de l'île. En ce qui concerne d'autres études sur les tendances climatiques récentes du nord-est canadien et du nord-ouest atlantique, nos résultats démontrent une corrélation dans la majorité des régions étudiées, entre les températures moyennes hivernales et les valeurs moyennes saisonnières de l'Oscillation Nord Atlantique (ONA) et l'Index île de Baffin-Atlantique Ouest (IBA). L'étude comparative des relevés de précipitations de ces stations révèle aussi des contrastes à l'échelle subrégionale dans le degré de variabilité et dans les tendances des totaux annuels et saisonniers. Pour St. John's, on analyse des séries typiques du total des précipitations hivernales et estivales sur l'ensemble du siècle dernier; on ne trouve aucune tendance significative dans ces séries, même si la variabilitéà court terme des précipitations est associée en partie aux températures moyennes des époques définies. Depuis les années 1940, on remarque que d'importantes augmentations des quantités totales et des fréquences des précipitations caractérisent la côte sud-ouest de l'île pendant l'hiver ainsi qu'en été. Le même phenomène se produit à l'est du Labrador en été. L'augmentation des chutes de neige sur la côte sudouest pendant les trois dernières décennies s'explique par des courants d'air synoptiques venant du large qui accompagnent la tendance positive prédominante hivernale de l'index de l'ONA pendant cette période.  相似文献   

15.
History of Science and Philosophy of Science. Introductory Remarks. This article introduces two special issues of the journal History of Science Reports (Berichte zur Wissenschaftsgeschichte) with contributions on the relationships of history and philosophy of science since the seventeenth century. The introduction begins with a brief reminder of Thomas Kuhn's provocative discussion of the relationship in the 1970s, placing it in the context of the debate of the period over whether the foundation of university departments for History and Philosophy of Science in the United States had led to a mere “marriage of convenience” or something more. Following this the paper briefly outlines the transformative impact of the “practical turn” in both philosophy and history of science since the 1990s, and contends that the relationship of history and philosophy of science has nonetheless become increasingly distant over time. This is due in large part to the professionalisation of history of science and to the recent turn to cultural approaches in that field; both trends have led to the adoption of strictly historicist rather than analytical perspectives on knowledge. General historians, too, are paying more attention to the increasing impact of science and technology, but have at most instrumental use for philosophical perspectives. Thus, the distinct possibility arises that the debate between historical and analytical approaches in philosophy of science is becoming a conversation within one discipline rather than a dialogue between two disciplines: what was once a ?marriage of convenience”? could end in respectful separation or amicable divorce. The article concludes with brief summaries of the articles published in the two special issues, indicating their relations to specific aspects of the broader topic at hand.  相似文献   

16.
A senior Japanese specialist on Russia's economy and its oil- and gas-producing sectors calculates that country's Revealed Comparative Advantage (RCA), Revealed Comparative Disadvantage (RCD), and Trade Specialization Index (TSI) on the basis of foreign trade data compiled by Russia's Federal Customs Service. The focus is on changes in comparative advantage of Russia's major export and import commodities over the 1994-2005 period. The results of the analyses make it possible to test the assertion that the increasing competitiveness of oil and gas exports (and secondarily those of armaments, selected base metals, roundwood, and fertilizers) must compensate for declining competitiveness in (and increasing imports of) meat, plastics, and automobile production and stagnation in the machinery sectors. Journal of Economic Literature, Classification Numbers: F02, F14, 011. 4 figures, 8 tables, 11 references.  相似文献   

17.
A British economist presents a comparative study focused on the change in the technological structure of Russia's high- and medium-technology industrial exports. The export profiles of 19 countries in the post-communist region, including the former Soviet Union and Eastern Europe are compared with those of China, India, Brazil, Mexico, and Indonesia. Classifying 260 export activities for each of the 24 countries according to the level of technology intensity required in production, the author measures change in export structures by employing the Krugman Specialization Index and the Balassa Index of Revealed Comparative Advantage. The results of measures are followed by a discussion of implications for the future development of high-tech industries and higher value-added exports in Russia. Journal of Economic Literature, Classification Numbers: F14, O11, O30, P50. 4 figures, 2 tables, 36 references.  相似文献   

18.
Recent syntheses for the Long Island Sound region argue for long-term cultural continuity amongst Holocene coastal hunter-gatherers. These notions derive primarily from studies of quartz lithic assemblages, which archaeologists argue show structural stasis over time. The remaining variability is explained with a ‘distance to source' model in which near-coastal sites tend to show a lack of quartz conservation while interior sites show quartz recycling. Under this model, technological strategies traditionally associated with raw material conservation (e.g., bipolar reduction) should not occur at near-coastal sites. We test the ‘distance to source’ model by reexamining a quartz lithic assemblage from Eagle's Nest-Long Island's richest Holocene coastal hunter-gatherer site. We find conclusive evidence for bipolar reduction in the site's “block/shatter” materials. Toolmakers used bipolar reduction to conserve raw material. Toolmakers also used anvils and bipolar reduction to open quartz cobbles, to stabilize freehand cores, to efficiently access cutting edges, and possibly to create crushed coarse quartz temper for pottery production. Our results point to previously unrecognized aspects of behavioral variability in the Eagle's Nest lithic assemblage and to possible revision of the ‘distance to source’ model. Similar variability may be present at other North American sites with quartz “block/shatter” material.  相似文献   

19.
Medical Botany: Plants Affecting Man's Health. Walter H. Lewis and Memory P.F. Elvin‐Lewis. New York: John Wiley and Sons, 1977. xv ‐ 515 pp. Index, illustrations. $29.50  相似文献   

20.
Combining economic development and poverty reduction is a challenge for developing countries. In the search for mechanisms that integrate both goals, this article examines the Republic of Korea's development strategy, which transformed one of Asia's poorest nations into an industrialized country with low levels of poverty. The authors investigate the state–society nexus in which Korea's developmental state has operated and look at the role of governance for economic development, focusing especially on multifunctioning institutions performing for economic growth and poverty reduction. The article provides strategic suggestions for developing countries on managing effectively within institutional constraints and moving beyond a simple emphasis on good governance.  相似文献   

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