Empirical relationship between the swelling of 0Kh16N15M3B steel and irradiation dose and temperature

1976 ◽  
Vol 40 (4) ◽  
pp. 360-363 ◽  
Author(s):  
V. N. Bykov ◽  
V. D. Dmitriev ◽  
L. G. Kostromin ◽  
S. I. Porollo ◽  
V. I. Shcherbak
Keyword(s):  
Irradiation Dose ◽  
Empirical Relationship ◽  
0Kh16n15m3b Steel

Bulk drag coefficient of a subaquatic vegetation subjected to irregular waves: Influence of Reynolds and Keulegan-Carpenter numbers

2020 ◽  
pp. 34-42
Author(s):  
Thibault Chastel ◽  
Kevin Botten ◽  
Nathalie Durand ◽  
Nicole Goutal
Keyword(s):  
Drag Coefficient ◽  
Wave Height ◽  
Wave Attenuation ◽  
Empirical Relationship ◽  
Breaking Waves ◽  
Irregular Waves ◽  
Geometrical Parameters ◽  
Flume Experiments ◽  
Seagrass Meadows ◽  
Artificial Vegetation

Seagrass meadows are essential for protection of coastal erosion by damping wave and stabilizing the seabed. Seagrass are considered as a source of water resistance which modifies strongly the wave dynamics. As a part of EDF R & D seagrass restoration project in the Berre lagoon, we quantify the wave attenuation due to artificial vegetation distributed in a flume. Experiments have been conducted at Saint-Venant Hydraulics Laboratory wave flume (Chatou, France). We measure the wave damping with 13 resistive waves gauges along a distance L = 22.5 m for the “low” density and L = 12.15 m for the “high” density of vegetation mimics. A JONSWAP spectrum is used for the generation of irregular waves with significant wave height Hs ranging from 0.10 to 0.23 m and peak period Tp ranging from 1 to 3 s. Artificial vegetation is a model of Posidonia oceanica seagrass species represented by slightly flexible polypropylene shoots with 8 artificial leaves of 0.28 and 0.16 m height. Different hydrodynamics conditions (Hs, Tp, water depth hw) and geometrical parameters (submergence ratio α, shoot density N) have been tested to see their influence on wave attenuation. For a high submergence ratio (typically 0.7), the wave attenuation can reach 67% of the incident wave height whereas for a low submergence ratio (< 0.2) the wave attenuation is negligible. From each experiment, a bulk drag coefficient has been extracted following the energy dissipation model for irregular non-breaking waves developed by Mendez and Losada (2004). This model, based on the assumption that the energy loss over the species meadow is essentially due to the drag force, takes into account both wave and vegetation parameter. Finally, we found an empirical relationship for Cd depending on 2 dimensionless parameters: the Reynolds and Keulegan-Carpenter numbers. These relationships are compared with other similar studies.

Radioimmunotherapy of Xenografts of Human Pancreatic Carcinomas - Intravenous and Intratumoral Application of 131l-Labelled Monoclonal Antibodies

1986 ◽  
Vol 25 (06) ◽  
pp. 235-238 ◽  
Author(s):  
S. Lander ◽  
M. Bahlo ◽  
R. Montz ◽  
R. Klapdor
Keyword(s):  
Irradiation Dose ◽  
Tumor Regression ◽  
Whole Body ◽  
Inhibit Tumor Growth ◽  
Local Irradiation ◽  
Clinical Value ◽  
Direct Radiation ◽  
Intravenous Injections ◽  
Induce Tumor Regression ◽  
High Doses

The effects of radioimmunotherapy were tested in xenografts of 2 different human pancreatic carcinomas comparing the intravenous and intratumoral application. On principle, intravenous injections of high doses of 131l-anti- Ca 19-9 or -BW 494/32 may inhibit tumor growth. In view of the low direct radiation dose (360-2100 rad), however, other factors than direct toxic effects have to be discussed, e. g. systemic effects due to the high whole-body irradiation. Intratumoral application, however, may induce tumor regression or growth inhibition due to the high local irradiation dose. Consequently, this treatment modality might be of clinical value at least in some patients.

Establishing an empirical equation for the relationship between total suspended solids and total phosphorus concentrations in the downstream Red river water

2020 ◽  
Vol 20 (3) ◽  
pp. 325-332
Author(s):  
Le Nhu Da ◽  
Le Thi Phuong Quynh ◽  
Phung Thi Xuan Binh ◽  
Duong Thi Thuy ◽  
Trinh Hoai Thu ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Suspended Solids ◽  
Empirical Relationship ◽  
Water Environment ◽  
Total Suspended Solids ◽  
River System ◽  
Red River ◽  
Reservoir Impoundment ◽  
Downstream Section ◽  
Reasonable Prediction

Recently, the Asian rivers have faced the strong reduction of riverine total suspended solids (TSS) flux due to numerous dam/reservoir impoundment. The Red river system is a typical example of the Southeast Asian rivers that has been strongly impacted by reservoir impoundment in both China and Vietnam, especially in the recent period. It is known that the reduction in total suspended solids may lead to the decrease of some associated elements, including nutrients (N, P, Si) which may affect coastal ecosystems. In this paper, we establish the empirical relationship between total suspended solids and total phosphorus concentrations in water environment of the Red river in its downstream section from Hanoi city to the Ba Lat estuary based on the sampling campaigns conducted in the dry and wet seasons in 2017, 2018 and 2019. The results show a clear relationship with significant coefficient between total suspended solids and total phosphorus in the downstream Red river. It is expressed by a simple equation y = 0.0226x0.3867 where x and y stand for total suspended solids and total phosphorus concentrations (mg/l) respectively with the r2 value of 0.757. This equation enables a reasonable prediction of total phosphorus concentrations of the downstream Red river when the observed data of total suspended solids concentrations are available. Thus, this work opens up the way for further studies on the calculation of the total phosphorus over longer timescales using daily available total suspended solids values.

Assessment of Absorbed Irradiation Dose Rate 137Cs by Emerged Plants in Oligotrophic and Eutrophic Water Bodies

2019 ◽  
Vol 55 (5) ◽  
pp. 100-106
Author(s):  
Ye. N. Volkova ◽  
V. V. Belyayev ◽  
S. P. Prishlyak ◽  
A. A. Parkhomenko
Keyword(s):  
Dose Rate ◽  
Irradiation Dose ◽  
Water Bodies ◽  
Eutrophic Water ◽  
Irradiation Dose Rate

The relationship between output growth and unemployment in the Philippines economy (1990-2014):

2017 ◽  
Vol 5 (1) ◽  
pp. 49
Author(s):  
Marlon A. Mojica ◽  
Virgilio M. Tatlonghari
Keyword(s):  
Labor Force ◽  
Structural Break ◽  
Empirical Relationship ◽  
Trade Openness ◽  
Negative Relationship ◽  
Participation Rate ◽  
The Philippines ◽  
Output Growth ◽  
Recursive Least Squares ◽  
Parameter Instability

This paper examines the empirical relationship between unemployment and real output in the Philippines utilizing quarterly data from the Labor Force Survey by the Philippine Statistics Authority for the period from 1990-2014. The study employed three variants of Okun’s Law – the “gap” approach, the “first difference” approach, and a dynamic approach.   Findings show that the Okun’s coefficients based on the gap approach are consistent with the theoretical expectation of a negative relationship.  In the ARDL model, labor force participation rate and trade openness were found to be significantly related to unemployment. The result of dummy variable test revealed the presence of structural break following the re-definition of unemployment in the Philippines in 2005. Recursive least squares and rolling regressions show evidence of parameter instability in several sub-periods.

The Nexus Between Seniors' Tourism Expenditure and Well-Being in China

2020 ◽  
Vol 25 (1) ◽  
pp. 169-174
Author(s):  
Renuka Mahadevan ◽  
Vanessa Sha Fan
Keyword(s):  
Economic Growth ◽  
Life Satisfaction ◽  
Government Policy ◽  
Rural Areas ◽  
Empirical Relationship ◽  
Well Being ◽  
Tourism Demand ◽  
Leisure Travel ◽  
Policy Strategy ◽  
Tourism Expenditure

An examination of the two-way relationship between tourism expenditure and life satisfaction for seniors is undertaken in this article. This examination uses panel data on China's seniors and tracks the same seniors over 3 years. Results show that there is bidirectional causality between tourism expenditure and life satisfaction, casting doubt on previous studies that do not consider this two-way relationship. This empirical relationship highlights the importance of a two-pronged policy strategy— a government policy committed to social tourism programs for seniors who may not be able to afford travel and those who reside in rural areas. Another government strategy is to address aged concerns related to mobility and health to improve well-being and the provision of appropriate facilities for leisure travel. Senior tourism demand was found to be income inelastic and this result means that senior tourism can buffer Chinese economic growth in times of economic crisis and uncertainty, making the twin policy strategy a worthwhile consideration.

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