Stereochemical and mechanistic aspects of the di-.pi.-methane rearrangement. Effect of structural constraints which preclude preferred modes

1976 ◽  
Vol 98 (19) ◽  
pp. 5899-5906 ◽  
Author(s):  
Patrick S. Mariano ◽  
Richard B. Steitle ◽  
Darrel G. Watson ◽  
Michael J. Peters ◽  
Elliott Bay
Keyword(s):  
Structural Constraints ◽  
Rearrangement Effect

STRUCTURAL CONSTRAINTS ON COGNITIVE THEORY

1980 ◽  
Vol 25 (2) ◽  
pp. 203-204
Author(s):  
JOSEPH M. SCANDURA
Keyword(s):  
Cognitive Theory ◽  
Structural Constraints

Information-seeking to Support Personal and Community Wellbeing: Report of a study of New Zealand Men Using Focus Groups

2016 ◽  
Author(s):  
Peta Wellstead
Keyword(s):  
New Zealand ◽  
Focus Groups ◽  
Support Services ◽  
Information Seeking ◽  
Service Providers ◽  
Structural Constraints ◽  
Health And Wellbeing ◽  
Study Results ◽  
Groupes De Discussion

This paper reports part of an ongoing study exploring the information behaviour of New Zealand men during periods of diminished health and wellbeing. Focus groups were used for this iteration of the study. Results indicate that New Zealand men face both personal and structural constraints to their information-seeking during periods when their health and wellbeing may be compromised. This study highlights that service providers need to develop more effective information delivery mechanisms and support services for men. These services need to be appealing to men and reflect men’s information seeking preferences. The role of LIS professionals in supporting this endeavour is discussed. Cet article présente une étude en cours explorant le comportement informationnel d’ hommes néo-zélandais durant des périodes où leur état de santé et de bien-être est amoindri. Des groupes de discussion ont été utilisés pour cette itération de l'étude. Les résultats indiquent que les hommes en Nouvelle-Zélande font face à des contraintes à la fois  personnelles et structurelles dans leur recherche d'information pendant les périodes où leur santé et leur bien-être peuvent être affaiblis. Cette étude met en évidence le besoin pour les fournisseurs de services de développer des mécanismes de diffusion de l'information plus efficaces et des services de soutien pour les hommes. Ces services doivent être attrayants et refléter les préférences des hommes dans leurs recherches d’information. Le rôle des professionnels de l'information dans le soutien à cette entreprise est discuté.

Taken for a Ride

2017 ◽  
Author(s):  
Matteo Rizzo
Keyword(s):  
Public Transport ◽  
Dar Es Salaam ◽  
Structural Constraints ◽  
Urban Informality ◽  
African Cities ◽  
Political Interests ◽  
Contextual Understanding ◽  
Informal Economies ◽  
Political Economy Analysis ◽  
Analytical Power

The chapter starts by describing public transport in Dar es Salaam as ‘functional chaos’. It then critically reviews two thematic literatures, on African cities and on their informal economies, to reveal that references to chaos, dystopia, and their opposites, order and functionalism, are common. The key argument is that a highly contextual understanding of urban informality and of how African cities work is required to avoid overly deterministic structural accounts and romantic celebration of African agency without due attention to structural constraints. The chapter presents the book’s approach: namely a political-economy analysis, centred on class analysis and wary of automatically reading off the political interests of actors from their class position. It argues that neoliberalism and post-socialism are key to understanding Tanzania and public transport in Dar es Salaam, and calls for grounding ‘actually existing neoliberalism’ in a particular context while retaining the analytical power of the concept of neoliberalism.

The prefield after the Old High German period

2018 ◽  
Author(s):  
Augustin Speyer ◽  
Helmut Weiß
Keyword(s):  
Ninth Century ◽  
Structural Constraints ◽  
Old High German ◽  
Syntactic Change ◽  
The One ◽  
Split Cp

The filling of the prefield in Modern German is determined by information-structural constraints such as scene-setting, contrastiveness, and topichood. While OHG does not yet show competition between these constraints, competition arises from MHG onward. This has to do with the generalization of the V2 constraint (i.e. the one-constituent property of the prefield) for declarative clauses, in which context the information-structural constraints are loosened. The syntactic change whose result eventually was the loss of multiple XP fronting comprised a change of the feature endowment of C because the fronting of expletive thô (roughly in the OHG of the ninth century) led to the reanalysis of XP fronting as a semantically vacuous movement whose only function is to check the EPP feature of C. Data from doubly filled prefields in ENHG and post-initial connectives indicate that an articulated split CP-structure, as proposed within the cartographic approach, is also at play in German.

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