Why Do Diffusion Data Not Fit the Logistic Model? A Note on Network Discreteness, Heterogeneity and Anisotropy

Author(s):  
Dominique Raynaud
2019 ◽  
Vol 10 (1) ◽  
pp. 21-28
Author(s):  
Aniela Bălăcescu ◽  
Radu Șerban Zaharia

Abstract Tourist services represent a category of services in which the inseparability of production and consumption, the inability to be storable, the immateriality, and last but not least non-durability, induces in tourism management a number of peculiarities and difficulties. Under these circumstances the development of medium-term strategies involves long-term studies regarding on the one hand the developments and characteristics of the demand, and on the other hand the tourist potential analysis at regional and local level. Although in the past 20 years there has been tremendous growth of on-line booking made by household users, the tour operators agencies as well as those with sales activity continue to offer the specific services for a large number of tourists, that number, in the case of domestic tourism, increased by 1.6 times in case of the tour operators and by 4.44 times in case of the agencies with sales activity. At the same time, there have been changes in the preferences of tourists regarding their holiday destinations in Romania. Started on these considerations, paper based on a logistic model, examines the evolution of the probabilities and scores corresponding to the way the Romanian tourists spend their holidays on the types of tourism agencies, actions and tourist areas in Romania.


2005 ◽  
Vol 96 (10) ◽  
pp. 1187-1192 ◽  
Author(s):  
Raymond J. Kremer ◽  
Mysore A. Dayananda ◽  
Alexander H. King

2006 ◽  
Vol 9 (4) ◽  
pp. 1-36 ◽  
Author(s):  
Jakša Cvitanic ◽  
Boris Rozovskii ◽  
Ilya Zaliapin

1989 ◽  
Vol 54 (7) ◽  
pp. 1821-1829
Author(s):  
Bedřich Porsch ◽  
Simon King ◽  
Lars-Olof Sundelöf

The differences between the QELSS and classical diffusion coefficient of a polydisperse polymer resulting from distinct definitions of experimentally accessible average values are calculated for two assumed specific forms of molar mass distributions. Predicted deviations are compared with the experiment using NBS 706 standard polystyrene. QELSS Dz of this sample relates within 2-4% to the classical diffusion coefficient, if the Schulz-Zimm molar mass distribution is assumed to be valid. In general, differences between the height-area and QELSS diffusion coefficient of about 20% may be found for Mw/Mn ~ 2, and this value may increase above 35%, if strongly tailing molar mass distribution pertains to the sample.


2003 ◽  
Vol 39 (9) ◽  
pp. 749 ◽  
Author(s):  
E. Miranda ◽  
A. Cester ◽  
A. Paccagnella

2021 ◽  
Vol 25 (1) ◽  
pp. 2156759X2110186
Author(s):  
Emily Sallee ◽  
Kok-Mun Ng ◽  
Abraham Cazares-Cervantes

Despite the growing epidemic of suicide ideation and attempt in adolescents, there is a lack of theory-based, empirical research to shed light on these issues in this population and inform school counselors’ preventive and responsive practices. We utilized Joiner’s Interpersonal Theory of Suicide (IPTS) to examine the extent to which the interpersonal constructs of perceived burdensomeness and thwarted belongingness predicted adolescent suicide ideation and attempt by conducting two binomial logistic regressions on archival data from the 2017 eighth-grade Oregon Healthy Teens Survey. Six of the seven selected proxy items were statistically significant in each logistic model, with slight variance between the two. Our findings suggest that the interpersonal constructs of the IPTS are applicable to early adolescents and may be used to inform suicide prevention and intervention efforts among this population in school settings.


Sign in / Sign up

Export Citation Format

Share Document