scholarly journals Debris-flow runout distance: laboratory experiments on the role of Bagnold, Savage and friction numbers

2012 ◽  
Author(s):  
F. Bettella ◽  
T. Bisantino ◽  
V. D’Agostino ◽  
F. Gentile
Keyword(s):  
Debris Flow ◽  
Laboratory Experiments ◽  
Runout Distance

Observation and Experimentation

2018 ◽  
Author(s):  
Massimiliano Di Ventra
Keyword(s):  
Laboratory Experiments ◽  
The Difference

This chapter expands on the previous one on the role of experiments in Science. It explains the difference between observations of phenomena and controlled laboratory experiments.

scholarly journals Role of the Rheological Parameters in Debris Flow Modelling

2021 ◽  
Vol 1092 (1) ◽  
pp. 012041
Author(s):  
M A Khan ◽  
Z Mustaffa ◽  
A L B Balogun ◽  
M A M Al-Bared ◽  
A Ahmad
Keyword(s):  
Debris Flow ◽  
Rheological Parameters ◽  
Flow Modelling

How much would you like to pay? Trust, reciprocity and prosocial motivations in El trato

2012 ◽  
Vol 51 (3) ◽  
pp. 389-417 ◽  
Author(s):  
Francisco J León ◽  
José A Noguera ◽  
Jordi Tena-Sánchez
Keyword(s):  
Social Science ◽  
External Validity ◽  
Laboratory Experiments ◽  
Social Science Research ◽  
Science Research ◽  
Trust Game ◽  
Sales Strategy ◽  
Pay What You Want ◽  
Natural Settings

Prosocial motivations and reciprocity are becoming increasingly important in social-science research. While laboratory experiments have challenged the assumption of universal selfishness, the external validity of these results has not been sufficiently tested in natural settings. In this article we examine the role of prosocial motivations and reciprocity in a Pay What You Want (PWYW) sales strategy, in which consumers voluntarily decide how much to pay for a product or service. This article empirically analyses the only PWYW example in Spain to date: the El trato (‘The deal’) campaign launched by the travel company Atrápalo, which offered different holiday packages under PWYW conditions in July 2009. Our analysis shows that, although the majority of the customers did not behave in a purely self-interested manner, they nonetheless did so in a much higher proportion than observed in similar studies. We present different hypotheses about the mechanisms that may explain these findings. Specifically, we highlight the role of two plausible explanations: the framing of the campaign and the attribution of ‘hidden’ preferences to Atrápalo by its customers, which undermined the interpretation of El trato as a trust game.

Deposition Prediction of Debris Flow Alluvial Fan Based on Experimental Study

2012 ◽  
Vol 518-523 ◽  
pp. 4819-4822
Author(s):  
Jin Feng Liu ◽  
Shun Yang ◽  
Guo Qiang Ou
Keyword(s):  
Experimental Study ◽  
Debris Flow ◽  
Statistical Method ◽  
Laboratory Experiments ◽  
Empirical Models ◽  
Alluvial Fan ◽  
Disaster Prevention ◽  
Average Accuracy ◽  
Hazardous Area ◽  
Debris Flow Disaster

The deposition prediction of debris flow hazardous area is very important for organizing and implementing debris flow disaster prevention and reduction. This paper selected the data base from laboratory experiments and applied the multiple regression statistical method to establish a series of empirical calculation models for delimiting the debris flow hazardous areas on the alluvial fan. The empirical models for predicting the maximum deposition length (Lc), the maximum deposition width (Bmax) and the maximum deposition thichness (Z0) under the condition of different debris flow volumes (V), densities (rm) and slopes of accumulation area (θd) were establised. And the verification results indicated that the established models can predict the debris flow hazards area with the average accuracy of 86%.

The Effect of Face Consciousness on Consumption of Counterfeit Luxury Goods

2014 ◽  
Vol 42 (6) ◽  
pp. 1007-1014 ◽  
Author(s):  
Yun-Qing Chen ◽  
Hong Zhu ◽  
Meng Le ◽  
Yi-Zhen Wu
Keyword(s):  
Purchase Intention ◽  
Laboratory Experiments ◽  
Positive Influence ◽  
Luxury Goods ◽  
Intention To Purchase ◽  
Luxury Item ◽  
Moderating Role ◽  
Chinese Undergraduates ◽  
Significant Positive Influence

We conducted 3 laboratory experiments to determine how face consciousness influences consumption of counterfeit luxury goods, along with the moderating roles of usage occasion and brand prominence. The participants in the first study were 138 Chinese undergraduates who were allocated to a 2 × 2 design to evaluate their intention to purchase a counterfeit luxury item that would be used either in public or in private. In Studies 2 and 3, using two 2 × 2 designs we evaluated the purchase intention of the participants (132 and 136, respectively) in order to investigate the moderating role of brand prominence. The results showed that participants' face consciousness had a significant positive influence on intention to purchase counterfeit luxury goods. In addition, the products' usage occasion and brand prominence positively moderated the influence that face consciousness had on counterfeit luxury item purchase intention of our participant groups.

Geluidhinder: decibels of onrechtvaardige procedures?

2007 ◽  
Vol 20 (4) ◽  
Author(s):  
Eveline Maris ◽  
Pieter Jan Stallen ◽  
Herman Steensma ◽  
Riël Vermunt
Keyword(s):  
Laboratory Experiments ◽  
Noise Exposure ◽  
Justice Theory ◽  
Psychological Model ◽  
Aviation Noise ◽  
Noise Annoyance ◽  
The Social ◽  
Management Procedures ◽  
Sound Management

Noise Annoyance: Decibels or Unfair Procedures? The contribution of social (in)justice theory to the explanation of noise annoyance Noise Annoyance: Decibels or Unfair Procedures? The contribution of social (in)justice theory to the explanation of noise annoyance E. Maris, P.J.M. Stallen, H. Steensma & R. Vermunt, Gedrag & Organisatie, volume 20, November 2007, nr. 4, pp. 445-460 Noise annoyance is determined by acoustical (e.g., loudness, pitch) and nonacoustical variables (e.g., sensitivity, attitudes towards the source). What is the role of social nonacoustical variables (e.g., the sound management)? Three laboratory experiments (N1 = 90, N2 = 117, N3 = 76 subjects) investigating the effects of fair (i.e., 'voice'), neutral, and 'unfair' (i.e., inconsistent procedure) sound management procedures on annoyance with fifteen minutes of 50 or 70 dB A(Leq.) aircraft sound, are evaluated. Results from each experiment show that systematic differences in procedural fairness yield systematic differences in annoyance. The combined results suggest that: 1) a psychological model of noise annoyance needs to consider the social aspects of noise exposure, 2) the operation of social nonacoustical determinants depends on the perceived harmfulness of the exposure situation, arising either from the situation's acoustics or from its social implications, and 3) aviation noise policies should pay due attention to the fairness of their procedures.

The role of forest deadwood in rockfall protection

2021 ◽  
Author(s):  
Adrian Ringenbach ◽  
Peter Bebi ◽  
Perry Bartelt ◽  
Andrin Caviezel
Keyword(s):  
Basal Area ◽  
Spruce Forest ◽  
Runout Distance ◽  
In Situ Sensors ◽  
Efficient Protection ◽  
Cost Efficient ◽  
Study Sites ◽  
Rockfall Protection

<p>Forests with a high density and basal area of living trees are known for their function as natural and cost-efficient protection against rockfall. The role of deadwood, however, is less understood. We address this knowledge gap in this contribution as we present the results of repeated real-scale experiments in a) a montane beech-spruce forest with and without deadwood and b) in a subalpine scrub mountain pine-spruce forest with deadwood. We used artificial rocks with either an equant or platy shape, masses between 45 kg and 800 kg (≈ 0.3 m3), and equipped with in-situ sensors to gain insights into rotational velocities and impact-accelerations. Clusters of deadwood and erected root plates reduced the mean runout distance at both study sites. For site a), we found that more rocks were stopped behind lying than living trees and that the stopping effect of deadwood was greater for equant compared to platy rock shapes. Site b) revealed a braking effect of scrub mountain pines for relatively small (45 kg), but also a visible reduction in rotational velocities for the 800 kg rocks sensor stream. We conclude that deadwood must be taken into account in rockfall modeling and the management of rockfall protection forests.</p>

Multi-temporal analysis of the role of check dams in a debris-flow channel: Linking structural and functional connectivity

Geomorphology ◽  
2019 ◽  
Vol 345 ◽  
pp. 106844 ◽  
Author(s):  
Sara Cucchiaro ◽  
Federico Cazorzi ◽  
Lorenzo Marchi ◽  
Stefano Crema ◽  
Alberto Beinat ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Debris Flow ◽  
Temporal Analysis ◽  
Flow Channel ◽  
Check Dams ◽  
Multi Temporal
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