Eff[|#27#|]ect of the Parametric Excitation on the Longitudinal Stability of Hovering MAVs/Insects

2014 ◽  
Author(s):  
Haitham E. Taha ◽  
Ali Nayfeh ◽  
Muhammad R. Hajj
Keyword(s):  
Parametric Excitation ◽  
Longitudinal Stability

Longitudinal Stability of Aeroplanes

1908 ◽  
Vol 66 (1714supp) ◽  
pp. 292-292
Author(s):  
Henry T. Strong
Keyword(s):  
Longitudinal Stability

The analysis of design procedures for longitudinal stability of main pipeline sections

2019 ◽  
Vol 9 (4) ◽  
pp. 387-393 ◽  
Author(s):  
Irina G. Silina ◽  
◽  
Eugeny A. Gilmiyarov ◽  
Vadim A. Ivanov ◽  
◽  
...  
Keyword(s):  
Main Pipeline ◽  
Longitudinal Stability ◽  
Design Procedures

scholarly journals Cognitive Subtyping in Schizophrenia: A Latent Profile Analysis

2020 ◽  
Author(s):  
Keane Lim ◽  
Jason Smucny ◽  
Deanna M Barch ◽  
Max Lam ◽  
Richard S E Keefe ◽  
...  
Keyword(s):  
Cognitive Performance ◽  
Latent Profile Analysis ◽  
Reference Group ◽  
Profile Analysis ◽  
Cognitive Profiles ◽  
Discovery Cohort ◽  
Longitudinal Stability ◽  
Disease Heterogeneity ◽  
Independent Cohort ◽  
Latent Profile

Abstract Cognitive dysfunction is a core feature of schizophrenia. The subtyping of cognitive performance in schizophrenia may aid the refinement of disease heterogeneity. The literature on cognitive subtyping in schizophrenia, however, is limited by variable methodologies and neuropsychological tasks, lack of validation, and paucity of studies examining longitudinal stability of profiles. It is also unclear if cognitive profiles represent a single linear severity continuum or unique cognitive subtypes. Cognitive performance measured with the Brief Assessment of Cognition in Schizophrenia was analyzed in schizophrenia patients (n = 767). Healthy controls (n = 1012) were included as reference group. Latent profile analysis was performed in a schizophrenia discovery cohort (n = 659) and replicated in an independent cohort (n = 108). Longitudinal stability of cognitive profiles was evaluated with latent transition analysis in a 10-week follow-up cohort. Confirmatory factor analysis (CFA) was carried out to investigate if cognitive profiles represent a unidimensional structure. A 4-profile solution was obtained from the discovery cohort and replicated in an independent cohort. It comprised of a “less-impaired” cognitive subtype, 2 subtypes with “intermediate cognitive impairment” differentiated by executive function performance, and a “globally impaired” cognitive subtype. This solution showed relative stability across time. CFA revealed that cognitive profiles are better explained by distinct meaningful profiles than a severity linear continuum. Associations between profiles and negative symptoms were observed. The subtyping of schizophrenia patients based on cognitive performance and its associations with symptomatology may aid phenotype refinement, mapping of specific biological mechanisms, and tailored clinical treatments.

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