Production of a blast with a high energy concentration

1975 ◽  
Vol 14 (1) ◽  
pp. 142-143
Author(s):  
M. A. Lebedev ◽  
M. M. Rusakov
Keyword(s):  
High Energy ◽  
Energy Concentration ◽  
High Energy Concentration

scholarly journals Review on Recent Developments in Laser Driven Inertial Fusion

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
M. Ghoranneviss ◽  
A. Salar Elahi
Keyword(s):  
Fusion Energy ◽  
Laser Pulses ◽  
High Energy ◽  
Energy Concentration ◽  
Inertial Fusion ◽  
Short Pulses ◽  
Confinement Fusion ◽  
Recent Developments ◽  
Very High Energy ◽  
High Energy Concentration

Discovery of the laser in 1960 hopes were based on using its very high energy concentration within very short pulses of time and very small volumes for energy generation from nuclear fusion as “Inertial Fusion Energy” (IFE), parallel to the efforts to produce energy from “Magnetic Confinement Fusion” (MCF), by burning deuterium-tritium (DT) in high temperature plasmas to helium. Over the years the fusion gain was increased by a number of magnitudes and has reached nearly break-even after numerous difficulties in physics and technology had been solved. After briefly summarizing laser driven IFE, we report how the recently developed lasers with pulses of petawatt power and picosecond duration may open new alternatives for IFE with the goal to possibly ignite solid or low compressed DT fuel thereby creating a simplified reactor scheme. Ultrahigh acceleration of plasma blocks after irradiation of picosecond (PS) laser pulses of around terawatt (TW) power in the range of 1020 cm/s2was discovered by Sauerbrey (1996) as measured by Doppler effect where the laser intensity was up to about 1018 W/cm2. This is several orders of magnitude higher than acceleration by irradiation based on thermal interaction of lasers has produced.

High energy concentration by symmetric shock focusing

Shock Waves ◽  
2013 ◽  
Vol 23 (4) ◽  
pp. 361-368 ◽  
Author(s):  
N. Apazidis ◽  
M. Kjellander ◽  
N. Tillmark
Keyword(s):  
High Energy ◽  
Energy Concentration ◽  
Shock Focusing ◽  
High Energy Concentration

Effect on silage intake and milk production of incorporating maize silage in dairy cow rations based on grass silage of either average or high energy concentration

1991 ◽  
Vol 1991 ◽  
pp. 145-145
Author(s):  
R F Weller ◽  
A J Rook ◽  
R H Phipps
Keyword(s):  
Milk Production ◽  
High Energy ◽  
Energy Concentration ◽  
Maize Silage ◽  
Forage Maize ◽  
Grass Silage ◽  
Yield And Quality ◽  
Forage Intake ◽  
Forage Mixtures ◽  
High Energy Concentration

Following the introduction of milk quota many farmers attempted to place greater reliance on home grown forage as a means of decreasing concentrate inputs and thus reducing input costs. As a high energy forage, maize silage should have the potential to increase forage intake and influence milk yield and quality. The objective of the current trial was to examine the effect on forage intake and milk production of incorporating maize silage into rations based on grass silage with average or high energy concentration.Sixty-three multiparous and 28 primiparous Friesian cows were used in a trial lasting 20 weeks. Following a two week covariate period cows were allocated to treatment. Treatments were based on forage mixtures of maize silage and grass silage of either average (A) or high (H) energy value in which maize formed 0, 25, SO or 75% of the forage mixture DM.

scholarly journals PSX-11 Effects of lamb’s breed and energy concentration of diet on nutrient digestibility and growth performance

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 466-467
Author(s):  
Anderson Pereira ◽  
Hyane Lima ◽  
Leonardo M Freitas ◽  
Henrique Parente ◽  
Antônio Lima ◽  
...  
Keyword(s):  
Block Design ◽  
High Energy ◽  
Nutrient Digestibility ◽  
Low Energy ◽  
Energy Concentration ◽  
Metabolic Adaptation ◽  
Fat Depots ◽  
Arid Conditions ◽  
Food Shortages ◽  
Subcutaneous Adipose

Abstract The accumulation of subcutaneous adipose deposits occurs in many genotypes of animals adapted to tropical arid conditions. In sheep, good adaptation of fat-tailed sheep breeds, as Rabo Largo, to arid environmental conditions and food shortages can also undergo digestive and metabolic adaptation, including a greater capacity for digestion of poor roughage. Forty lambs (18±3 kg initial BW) were assigned in a randomized completely block design with a 2x2 factorial arrangement of treatments, with 2 breeds – B (Santa Inês- SI and Rabo Largo-RL) and 2 diets – D (low and high energy), resulting in four treatments: SILE, SIHE, RLLE and RLHE. Lambs (20 SI and 20 RL) were individually penned during 43 d and fed 1 of 2 diets with different concentrate: roughage ratio: low energy-LE (with 70% hay and 10.7% CP, DM basis) and high energy-HE (70% concentrate and 12.7% CP, DM basis). At the end of performance period, the intake was recorded and total feces collected for 5 d. Data were analyzed by ANOVA and when a significant effect (P < 0.05) was found, means were compared using Tukey’s method. The G:F ratio had effect only for D (0.12, 0.22, 0.10 and 0.24 for SILE, SIHE, RLLE and RLHE, respectively). There was observed an effect of D and B (P < 0.05) for all variables related to growth and digestibility, with higher means for SI and HE, except for NDF intake (495, 322, 340 and 268 g/d for SILE, SIHE, RLLE and RLHE, respectively) and NDF digestibility (63, 58, 59 and 45% for SILE, SIHE, RLLE and RLHE). It was observed an interaction D x B on CP intake, NDF intake and NDF digestibility. Breed and diets affected the performance and digestibility of lambs. However, RLLE increased the NDF digestibility, but decreased the ADG, suggesting higher fat depots accumulation.

scholarly journals Milk Urea Concentration in Dairy Sheep: Accounting for Dietary Energy Concentration

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1118 ◽  
Author(s):  
Valeria Giovanetti ◽  
Filippo Boe ◽  
Mauro Decandia ◽  
Giovanni Cristoforo Bomboi ◽  
Alberto Stanislao Atzori ◽  
...  
Keyword(s):  
Mean Squared Error ◽  
Energy Content ◽  
High Energy ◽  
Urea Concentration ◽  
Energy Concentration ◽  
Net Energy ◽  
Dietary Energy ◽  
Dairy Sheep ◽  
Dairy Ewes ◽  
Milk Urea

In dairy sheep milk urea concentration (MUC) is highly and positively correlated with dietary crude protein (CP) content and, to a lesser extent, with protein intake. However, the effect of dietary energy and carbohydrate sources on MUC of lactating ewes is not clear. Thus, the objective of this study was to assess the effects of diets differing in energy concentration and carbohydrate sources on MUC values in lactating dairy ewes. Two experiments were conducted (experiment 1, E1, and experiment 2, E2) on Sarda ewes in mid and late lactation kept in metabolic cages for 23 d. In both experiments, homogeneous groups of five ewes were submitted to four (in E1) or three (in E2) dietary treatments, consisting of pelleted diets ranging from low energy (high-fiber diets: 1.2–1.4 Mcal of net energy for lactation (NEL)) to high energy (high-starch diets: 1.7–1.9 Mcal of NEL) contents, but with a similar CP concentration (18.4% dry matter (DM), on average). Each diet had a different main ingredient as follows: corn flakes, barley meal, beet pulp, or corn cobs in E1 and corn meal, dehydrated alfalfa, or soybean hulls in E2. Regression analysis using treatment means from both experiments showed that the best predictor of MUC (mg/100 mL) was the dietary NEL (Mcal/kg DM, MUC = 127.6 − 51.2 × NEL, R2 = 0.85, root of the mean squared error (rmse) = 4.36, p < 0.001) followed by the ratio CP/NEL (g/Mcal, MUC = −14.9 + 0.5 × CP/ NEL, R2 = 0.83, rmse = 4.63, p < 0.001). A meta-regression of an extended database on stall-fed dairy ewes, including the E1 and E2 experimental data (n = 44), confirmed the predictive value of the CP/ NEL ratio, which resulted as the best single predictor of MUC (MUC = −13.7 + 0.5 × CP/NEL, R2 = 0.93, rmse = 3.30, p < 0.001), followed by dietary CP concentration (MUC = −20.7 + 3.7 × CP, R2 = 0.82, rmse = 4.89, p < 0.001). This research highlights that dietary energy content plays a pivotal role in modulating the relationship between MUC and dietary CP concentration in dairy sheep.

Sign in / Sign up

Export Citation Format

Share Document