scholarly journals COMPACTION AND WATERPROOFING OF THE SOIL IN THE URBAN FLUVIAL CHANNELS

Mercator ◽  
2020 ◽  
Vol 19 (2020) ◽  
pp. 1-16
Author(s):  
Elizon Dias Nunes ◽  
Lucas Esp´´índola Rosa
Keyword(s):  
Surface Runoff ◽  
Temporal Correlation ◽  
Pressure Increase ◽  
Time Increase ◽  
Densification Process ◽  
Urban Density ◽  
Concentration Time ◽  
River Plain ◽  
Anthropic Pressure

The expansion and the urban densification have implied phenomena related to the degradation of watersheds. This work aims to evaluate the influence of anthropic pressure increase on the imbalances involving erosive processes and consequent degradation of the river plain of a watershed in Aparecida de Goiânia - GO. The methodology comprehended the spatial-temporal correlation between reduction of concentration time, increase of surface runoff estimates, and the consequent degradation of the lowlands in 1992, 2005 and 2016. The results indicate an increase of erosions in segments of convergence of channels, low altimetric gradient and occurrence of Fluovian Neosol, resulting from the increase of volume and peaks of flow coming from areas of significant densification process in the last 24 years. Thus, it is important to use indicators of anthropic pressure increase in the understanding of impacts related to urban density.

Routines, Rituals, and Rugby: Case Study of a World Class Goal Kicker

2001 ◽  
Vol 15 (1) ◽  
pp. 48-65 ◽  
Author(s):  
Robin C. Jackson ◽  
Julien S. Baker
Keyword(s):  
Temporal Consistency ◽  
Psychological Skills ◽  
Time Increase ◽  
Preparation Time ◽  
Mental Preparation ◽  
Concentration Time ◽  
World Class ◽  
Physical Preparation ◽  
Do So

This paper presents a case study of the most prolific rugby goal kicker of all time. In the first part of the study, the consistency of his preperformance routine was analyzed over kicks of varying difficulty. Results indicate that while certain physical aspects of his routine remain consistent, both his concentration time and physical preparation time increase with kick difficulty. In the second part of the study, the participant was interviewed about his physical and mental preparation for rugby goal kicking in competitive situations. The interview revealed that the participant incorporates a number of psychological skills into his routine, including thought stopping, cueing, and imagery but does not do so consistently. However, he perceives the timing of his routine to be highly consistent. Implications of these findings for the recommendation that performers strive for temporal consistency in their routines (Boutcher, 1990) are discussed.

scholarly journals An empirical approach for computing surface runoff concentration time

2018 ◽  
Vol 9 (2) ◽  
pp. 410-420
Author(s):  
Shanshan Bao ◽  
Xiaojun Wang ◽  
Hongyan Li ◽  
Hang Lv ◽  
Yuening Li
Keyword(s):  
Genetic Algorithm ◽  
Surface Runoff ◽  
Empirical Formula ◽  
Rainfall Intensity ◽  
Daily Precipitation ◽  
Average Concentration ◽  
Songhua River ◽  
Concentration Time ◽  
Average Rainfall ◽  
Basin Area

Abstract This article examines data from the Shihuiyao, Nierji, Tongmeng, Jiangqiao, and Dalai hydrological stations in the Nen River basin to understand the hydrological processes occurring in the catchments. Daily precipitation and runoff data from 1955 to 1973 were combined using the smoothed minima trial method to determine the surface runoff concentration time. Then, a genetic algorithm was used to optimize the parameters and obtain an optimal empirical formula. An improved empirical formula was implemented with the genetic algorithm and optimized parameters then incorporated variable average rainfall intensity, correlation between basin area, surface runoff average concentration time, and average rainfall intensity. Finally, an optimized empirical formula (using genetic algorithm to optimize the parameters) and improved empirical formula (incorporating variable average rainfall intensity) were tested by using the daily precipitation and runoff data from the Baishan and Hongshi hydrological stations of the Second Songhua River. The results show that an optimized and improved formula can be used to more accurately estimate hydrologic conditions in the Nen River. Therefore, the improved formula is an efficient method for calculating surface runoff concentration time. Surface runoff concentration time is an important basis for differentiating source waters, which include surface runoff and underground runoff.

Is there a temporal correlation between cough and GERD?

2001 ◽  
Vol 120 (5) ◽  
pp. A119-A119
Author(s):  
A WUNDERLICH ◽  
J MURRAY
Keyword(s):  
Temporal Correlation

Precious Opal Mining in the Snake River Plain Rhyolites, Idaho

1972 ◽  
Vol 13 (3) ◽  
pp. 100-104 ◽  
Author(s):  
Paul L. Broughton
Keyword(s):  
Snake River Plain ◽  
Snake River ◽  
River Plain ◽  
Precious Opal

A FAST MACROBLOCK MODE SELECTING METHOD BASED ON SPATIAL-TEMPORAL CORRELATION FOR H.264

2005 ◽  
Vol 12 (1) ◽  
pp. 21-28
Author(s):  
Xiang Dong ◽  
Zhou Jingli ◽  
Yu Shengsheng ◽  
Chen Jiazhong
Keyword(s):  
Temporal Correlation

Numerical and experimental investigation on internal membrane pressure wave inside sealed structure

2013 ◽  
Vol 61 (3) ◽  
pp. 613-621 ◽  
Author(s):  
W. Barnat
Keyword(s):  
Experimental Investigation ◽  
Pressure Wave ◽  
Pressure Increase ◽  
Internal Organs ◽  
Pressure Impulse ◽  
Internal Membrane ◽  
Contaminated Area

Abstract The article presents an approach to modeling the internal membrane pressure wave inside a sealed structure. During an explosion near a vehicle when a pressure wave reaches a hull, a pressure wave inside arises due to the hull’s bottom and the deformation of sides. They act like the piston - membrane. This membrane transfers the pressure impulse into the vehicle’s interior. A pressure increase causes the damage of internal organs or even death of occupants. In case of an armor penetration the pressure increase may be even larger. One of basic methods to protect a crew is to open hatches. However, such a method cannot be used in a contaminated area.

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