scholarly journals The tree-generative capacity of combinatory categorial grammars

Author(s):  
Marco Kuhlmann ◽  
Andreas Maletti ◽  
Lena Katharina Schiffer
2021 ◽  
Vol 1770 (1) ◽  
pp. 012087
Author(s):  
M.I.Mary Metilda ◽  
Lalitha D
Keyword(s):  

2011 ◽  
Vol 22 (02) ◽  
pp. 411-426 ◽  
Author(s):  
GEORG ZETZSCHE

This article presents approaches to the open problem of whether erasing rules can be eliminated in matrix grammars. The class of languages generated by non-erasing matrix grammars is characterized by the newly introduced linear Petri net grammars. Petri net grammars are known to be equivalent to arbitrary matrix grammars (without appearance checking). In linear Petri net grammars, the marking has to be linear in size with respect to the length of the sentential form. The characterization by linear Petri net grammars is then used to show that applying linear erasing to a Petri net language yields a language generated by a non-erasing matrix grammar. It is also shown that in Petri net grammars (with final markings and arbitrary labeling), erasing rules can be eliminated, which yields two reformulations of the problem of whether erasing rules in matrix grammars can be eliminated.


2005 ◽  
Vol 1 (1) ◽  
pp. 59-78 ◽  
Author(s):  
CARL-ARDY DUBOIS ◽  
MARTIN MCKEE

After a long period of neglect, the issue of human resources for health (HRH) has recently emerged as a core component on the international health agenda, with policy makers increasingly eager to learn from experience elsewhere. This article investigates systematically the opportunities and challenges associated with the use of cross-national comparisons of HRH policies and practices. It reviews the evidence in favour of using international comparative studies on HRH, discusses emerging opportunities for developing a cross-national research agenda to guide HRH policies in Europe, and highlights obstacles which may hinder the implementation of comparative studies on HRH. While demonstrating many opportunities offered by the comparative approach to improve understanding of human resources processes in the health sector, this article also emphasizes the dangers of simplistic pleas for the transfer of human resource policies without taking into account the context-specific factors and the generative capacity of the social actors in the design and implementation of policy changes.


2018 ◽  
Vol 54 (2) ◽  
pp. 131-148 ◽  
Author(s):  
Johanna Mannergren Selimovic

How do we identify and understand transformative agency in the quotidian that is not contained in formal, or even informal structures? This article investigates the ordinary agency of Palestinian inhabitants in the violent context of the divided city of Jerusalem. Through a close reading of three ethnographic moments I identify creative micropractices of negotiating the separation barrier that slices through the city. To conduct this analytical work I propose a conceptual grid of place, body and story through which the everyday can be grasped, accessed and understood. ‘Place’ encompasses the understanding that the everyday is always located and grounded in materiality; ‘body’ takes into account the embodied experience of subjects moving through this place; and ‘story’ refers to the narrative work conducted by human beings in order to make sense of our place in the world. I argue that people can engage in actions that function both as coping mechanisms (and may even support the upholding of status quo), and as moments of formulating and enacting agential projects with a more or less intentional transformative purpose. This insight is key to understanding the generative capacity of everyday agency and its importance for the macropolitics of peace and conflict.


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