Toward a Systems Theory of Policy Analysis: Static versus Dynamic Analysis

1980 ◽  
Vol 5 (2) ◽  
pp. 235 ◽  
Author(s):  
Arlyn J. Melcher ◽  
Bonita H. Melcher
Keyword(s):  
Policy Analysis ◽  
Dynamic Analysis ◽  
Systems Theory ◽  
Static Versus Dynamic

Dynamic Analysis of Traveler Attitudes and Perceptions Using Panel Data

2000 ◽  
Vol 1718 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Sridhar Sunkanapalli ◽  
Ram M. Pendyala ◽  
Arun R. Kuppam
Keyword(s):  
Panel Data ◽  
Policy Analysis ◽  
Dynamic Analysis ◽  
Descriptive Analysis ◽  
Puget Sound ◽  
Panel Survey ◽  
Market Segments ◽  
Attitudes And Perceptions ◽  
Similarities And Differences ◽  
Over Time

A dynamic analysis of travelers’ attitudes, preferences, and values was carried out using three waves of the Puget Sound Transportation Panel survey to investigate dynamics in traveler attitudes and perceptions. An in-depth descriptive analysis was performed to examine the variations in attitudinal ratings over time. A traditional one-way analysis of variance (ANOVA) method was used to explore for similarities and differences in traveler attitudinal ratings across different waves of the panel survey. A similar analysis was performed on the stayer sample (i.e., the respondents who participated in all three waves of the panel used in this study). The ANOVA results show significant differences in mean attitudinal ratings across the three waves of the panel survey. The differences in traveler attitudes and perceptions among stayers, dropouts (respondents who leave the panel survey), and refreshments (respondents who are newly recruited as the panel survey proceeds) were also captured. Finally, differences in traveler attitudes and preferences across different modal market segments were examined. The results indicate the need for greater consideration of attitudinal dynamics in transportation planning and policy analysis.

scholarly journals Design and Efficiency Research of a New Composite Vibrating Screen

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Zhanfu Li ◽  
Xin Tong ◽  
Bi Zhou ◽  
Xiaole Ge ◽  
Jingxiu Ling
Keyword(s):  
Dynamic Analysis ◽  
Systems Theory ◽  
Processing Capacity ◽  
Experiment Research ◽  
Vibrating Screen ◽  
Swing Angle ◽  
Screening Performance ◽  
Screening Efficiency ◽  
Vibration Parameters ◽  
Two Degree Of Freedom

A new composite vibrating mode is presented in this paper. Modeling and dynamic analysis are studied according to two-degree-of-freedom systems theory. The effects of vibration parameters, including swing angle, swing frequency, vibrating direction angle, and translation frequency, on the screening efficiency were researched by means of experiment research over a new laboratory-scale composite vibrating screen which is designed based on the new composite vibrating mode. The results are analysed in terms of curves and fitting equations. Compared to the translation mode and swing mode, the screening performance of the new composite vibrating mode, both in screening efficiency and in processing capacity, is significantly improved.

Policy Analysis: Rent-to-Own May Be Only Option for Medicare Speech-Generating Devices

ASHA Leader ◽  
2013 ◽  
Vol 18 (9) ◽  
Author(s):  
Mark Kander
Keyword(s):  
Policy Analysis

A new Medicare proposal that would change speech-generating devices from purchase-only equipment to rent-to-own equipment could be better for the patients who use them.

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