Reply to the comment on “Energy landscape of a small peptide revealed by dihedral angle principal component analysis”

2006 ◽  
Vol 64 (3) ◽  
pp. 798-799 ◽  
Author(s):  
Yuguang Mu ◽  
Phuong Nguyen ◽  
Gerhard Stock
Keyword(s):  
Principal Component Analysis ◽  
Dihedral Angle ◽  
Energy Landscape ◽  
Principal Component ◽  
Component Analysis ◽  
Small Peptide

Energy landscape of a small peptide revealed by dihedral angle principal component analysis

2004 ◽  
Vol 58 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Yuguang Mu ◽  
Phuong H. Nguyen ◽  
Gerhard Stock
Keyword(s):  
Principal Component Analysis ◽  
Dihedral Angle ◽  
Energy Landscape ◽  
Principal Component ◽  
Component Analysis ◽  
Small Peptide

Free-Energy Landscape of RNA Hairpins Constructed via Dihedral Angle Principal Component Analysis

2009 ◽  
Vol 113 (52) ◽  
pp. 16660-16668 ◽  
Author(s):  
Laura Riccardi ◽  
Phuong H. Nguyen ◽  
Gerhard Stock
Keyword(s):  
Principal Component Analysis ◽  
Free Energy ◽  
Dihedral Angle ◽  
Energy Landscape ◽  
Principal Component ◽  
Component Analysis ◽  
Free Energy Landscape ◽  
Rna Hairpins

Construction of the free energy landscape of biomolecules via dihedral angle principal component analysis

2008 ◽  
Vol 128 (24) ◽  
pp. 245102 ◽  
Author(s):  
Alexandros Altis ◽  
Moritz Otten ◽  
Phuong H. Nguyen ◽  
Rainer Hegger ◽  
Gerhard Stock
Keyword(s):  
Principal Component Analysis ◽  
Free Energy ◽  
Dihedral Angle ◽  
Energy Landscape ◽  
Principal Component ◽  
Component Analysis ◽  
Free Energy Landscape

scholarly journals 3TA1-03 Principal Component Analysis of Proteins in Dihedral Angle Space(The 47th Annual Meeting of the Biophysical Society of Japan)

2009 ◽  
Vol 49 (supplement) ◽  
pp. S51-S52
Author(s):  
Satoshi Omori ◽  
Sotaro Fuchigami ◽  
Mitsunori Ikeguchi ◽  
Akinori Kidera
Keyword(s):  
Principal Component Analysis ◽  
Annual Meeting ◽  
Dihedral Angle ◽  
Principal Component ◽  
Component Analysis ◽  
Biophysical Society ◽  
Angle Space

Dihedral angle principal component analysis of molecular dynamics simulations

2007 ◽  
Vol 126 (24) ◽  
pp. 244111 ◽  
Author(s):  
Alexandros Altis ◽  
Phuong H. Nguyen ◽  
Rainer Hegger ◽  
Gerhard Stock
Keyword(s):  
Molecular Dynamics ◽  
Principal Component Analysis ◽  
Molecular Dynamics Simulations ◽  
Dihedral Angle ◽  
Principal Component ◽  
Component Analysis ◽  
Dynamics Simulations

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

Review of Three-Mode Principal Component Analysis: Theory and Applications, Vol. 2.

1984 ◽  
Vol 29 (11) ◽  
pp. 915-916
Author(s):  
William R Koch
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Analysis Theory
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