Temporal adverbials and the present perfect/past tense alternation

2013 ◽  
Vol 34 (2) ◽  
pp. 202-240 ◽  
Author(s):  
Valentin Werner

Specification by certain temporal adverbials has been shown to be one of the typical triggers of the present perfect in British English. Often, however, L2 varieties display different patterns of temporal co-occurrence, especially using the simple past tense. This study is based on corpus data from twelve components of the International Corpus of English and analyzes the distribution between present perfect and past tense for a number of co-occurring temporal adverbials. In addition, it establishes three measures of similarity across the varieties (hierarchical cluster analysis, phylogenetic networks and a distribution-based measure). On the basis of 6 353 adverbials in total, this paper suggests (1) that there is a L1–L2 divide, (2) that the difference between “traditional” and “transplanted” L1 varieties is less pronounced, (3) that L2 varieties allow more variation, which indicates that in these varieties, the present perfect is partly used as a tense (sensu Quirk et al. 1985), and (4) that some temporal adverbials are less categorically attached to either present perfect or past tense than others. Finally, some conclusions with regard to the importance of geographical and socio-cultural proximity of certain varieties can be drawn.

Genetika ◽  
2005 ◽  
Vol 37 (3) ◽  
pp. 191-198 ◽  
Author(s):  
Dragan Nikolic ◽  
Vera Rakonjac ◽  
Momcilo Milutinovic ◽  
Milica Fotiric

Based on examination of 10 important pomologic and technologic properties, genetic divergence of 10 selected Oblacinska sour cherry clones was established. The genetic divergence between the analyzed clones was determined using the hierarchical cluster analysis. The UPGA method was used and the Euclidean distance in order to determine the difference between the groups. Four similar clone groups were obtained on the dendrogram. The objective of clone differentiation was primarily yield, although other properties were taken into account as well. As the most yielded clones for the production, that can be recommended, were clone D8 or clone D4 that are genetically very similar, and clone D3.


Corpora ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. 115-135 ◽  
Author(s):  
Xinyue Yao ◽  
Peter Collins

A number of recent studies of grammatical categories in English have identified regional and diachronic variation in the use of the present perfect, suggesting that it has been losing ground to the simple past tense from the eighteenth century onwards ( Elsness, 1997 , 2009 ; Hundt and Smith, 2009 ; and Yao and Collins, 2012 ). Only a limited amount of research has been conducted on non-present perfects. More recently, Bowie and Aarts’ (2012) study using the Diachronic Corpus of Present-Day Spoken English has found that certain non-present perfects underwent a considerable decline in spoken British English (BrE) during the second half of the twentieth century. However, comparison with American English (AmE) and across various genres has not been made. This study focusses on the changes in the distribution of four types of non-present perfects (past, modal, to-infinitival and ing-participial) in standard written BrE and AmE during the thirty-year period from the early 1960s to the early 1990s. Using a tagged and post-edited version of the Brown family of corpora, it shows that contemporary BrE has a stronger preference for non-present perfects than AmE. Comparison of four written genres of the same period reveals that, for BrE, only the change in the overall frequency of past perfects was statistically significant. AmE showed, comparatively, a more dramatic decrease, particularly in the frequencies of past and modal perfects. It is suggested that the decline of past perfects is attributable to a growing disfavour for past-time reference in various genres, which is related to long-term historical shifts associated with the underlying communicative functions of the genres. The decline of modal perfects, on the other hand, is more likely to be occurring under the influence of the general decline of modal auxiliaries in English.


Author(s):  
Milan Radojicic ◽  
Aleksandar Djokovic ◽  
Nikola Cvetkovic

Unpredictable and uncontrollable situations have happened throughout history. Inevitably, such situations have an impact on various spheres of life. The coronavirus disease 2019 has affected many of them, including sports. The ban on social gatherings has caused the cancellation of many sports competitions. This paper proposes a methodology based on hierarchical cluster analysis (HCA) that can be applied when a need occurs to end an interrupted tournament and the conditions for playing the remaining matches are far from ideal. The proposed methodology is based on how to conclude the season for Serie A, a top-division football league in Italy. The analysis showed that it is reasonable to play 14 instead of the 124 remaining matches of the 2019–2020 season to conclude the championship. The proposed methodology was tested on the past 10 seasons of the Serie A, and its effectiveness was confirmed. This novel approach can be used in any other sport where round-robin tournaments exist.


2010 ◽  
Vol 41 (2) ◽  
pp. 126-133 ◽  
Author(s):  
N. Kalamaras ◽  
H. Michalopoulou ◽  
H. R. Byun

In this study a method proposed by Byun & Wilhite, which estimates drought severity and duration using daily precipitation values, is applied to data from stations at different locations in Greece. Subsequently, a series of indices is calculated to facilitate the detection of drought events at these sites. The results provide insight into the trend of drought severity in the region. In addition, the seasonal distribution of days with moderate and severe drought is examined. Finally, the Hierarchical Cluster Analysis method is used to identify sites with similar drought features.


2019 ◽  
Vol 15 (S367) ◽  
pp. 397-399
Author(s):  
Arturo Colantonio ◽  
Irene Marzoli ◽  
Italo Testa ◽  
Emanuella Puddu

AbstractIn this study, we identify patterns among students beliefs and ideas in cosmology, in order to frame meaningful and more effective teaching activities in this amazing content area. We involve a convenience sample of 432 high school students. We analyze students’ responses to an open-ended questionnaire with a non-hierarchical cluster analysis using the k-means algorithm.


Author(s):  
Swarna Rajagopalan ◽  
Wesley Baker ◽  
Elizabeth Mahanna-Gabrielli ◽  
Andrew William Kofke ◽  
Ramani Balu

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