Time-Fractional KdV Equation for the plasma in auroral zone using Variational Methods

The reductive perturbation method has been employed to derive the Korteweg-de Vries (KdV) equation for small but finite amplitude electrostatic waves. The Lagrangian of the time fractional KdV equation is used in similar form to the Lagrangian of the regular KdV equation. The variation of the functional of this Lagrangian leads to the Euler-Lagrange equation that leads to the time fractional KdV equation. The Riemann-Liouvulle definition of the fractional derivative is used to describe the time fractional operator in the fractional KdV equation. The variational-iteration method given by He is used to solve the derived time fractional KdV equation. The calculations of the solution with initial condition A0*sech(cx)^2 are carried out. Numerical studies have been made using plasma parameters close to those values corresponding to the dayside auroral zone. The effects of the time fractional parameter on the electrostatic solitary structures are presented.Comment: 1 tex file + 5 eps figure

MAT-708: MONITORING THE CORROSION PROCESS OF REINFORCED CONCRETE FLAT SLAB-COLUMN CONNECTION

The corrosion of the steel reinforcement embedded in a two-way reinforced concrete flat slab around the column stub area was investigated in this study, which aimed to studying the effect of corrosion on the shear punching behavior. Two square flat slab-column connections were cast, the flat slab dimension was 1900 mm × 1900 mm × 150 mm, and the column dimensions was 250 mm × 250 mm. A specific delaminated area was corroded around the column stub to emphasize the effect of corrosion around punching area. The corrosion reached two levels of mass loss uniformly over that specified area: 0% and 26%. Corrosion process was monitored under an accelerated corrosion technique through the application of a constant potential of fifteen volts to reach the targeted uniform corrosion level. Then, the corrode slab-column connection was loaded until failure for each slab occurred. The corrosion performance of the slab was evaluated based on the results of the current measurement, half-cell potential tests, and mass loss. The test results show that the corrosion of reinforcement rebar around the column stub in flat slab causes a significant loss in punching shear capacity and affects the structural integrity by increasing crack widths

Mitigation of Lightning Hazards at the More Sensitive Points in Wind Farms Using Ant-Colony Optimization Technique

The lightning energy can be very harmfull to the wind turbine farm components. This paper attempts to evaluate the overvoltages at the sensitive points in wind farm, using ATP-EMTP package program. Four cases were performed; a) the transient voltage distribution in the insulating layer of the control line, b) the transient voltage on the control equipment, c) the coupling voltage between the tower and the control, and, d) the transient voltage distribution in the wind turbine WT generator, boast transformers and grid. These cases were performed under different lightning current conditions and at conventional design and proper design of grounding system. The results show that the ground potential rise (GPR) is reduced with using the proper design of wind turbine ground system, but the induced voltage at the control system will not affected. This work determines the optimum location of wind turbine at the areas of maximum lightning incidence. Ant colony optimization (ACO) technique is implemented to find the optimum wind farm location. This work enhances the protection strategy of the wind farms against lightning stroke

Mitigation of Lightning Hazards at the More Sensitive Points in Wind Farms Using Ant-Colony Optimization Technique

The lightning energy can be very harmfull to the wind turbine farm components. This paper attempts to evaluate the overvoltages at the sensitive points in wind farm, using ATP-EMTP package program. Four cases were performed; a) the transient voltage distribution in the insulating layer of the control line, b) the transient voltage on the control equipment, c) the coupling voltage between the tower and the control, and, d) the transient voltage distribution in the wind turbine WT generator, boast transformers and grid. These cases were performed under different lightning current conditions and at conventional design and proper design of grounding system. The results show that the ground potential rise (GPR) is reduced with using the proper design of wind turbine ground system, but the induced voltage at the control system will not affected. This work determines the optimum location of wind turbine at the areas of maximum lightning incidence. Ant colony optimization (ACO) technique is implemented to find the optimum wind farm location. This work enhances the protection strategy of the wind farms against lightning stroke

AMELIORATIVE EFFECT OF PHOENIX DACTYLIFERA ON ADVERSE EFFECTS OF LINEZOLID IN MALE ALBINO RATS

Objective: This study aimed to investigate the adverse effects of linezolid (LZD) on biochemical and hematological parameters and some organsincluding bone marrow, brain, and kidneys and to investigate the possibility of methanolic extract of Phoenix dactylifera (MEPD) to counteract theadverse effects of LZD.Methods: Forty-eight adult male albino rats were allocated into four equal groups (each of 12 animals). The first group received Tween 80 orally. Thesecond group received was given 0.5 ml of LZD suspension 4% in Tween 80 (100 mg/kg body weight) orally. The third group received the same doseof LZD suspension followed by 1 ml of MEPD orally. The rats in the last group were given 1 ml of MEPD (1000 mg/kg body weight) orally. Rats weresacrificed and blood samples were collected for hematological and biochemical study. Femur bones, brain, and kidneys were dissected and kept in ajar containing 10% formalin to perform the histopathological investigation.Results: The dose of LZD administered for 14 successive days induced a mild-to-moderate hematological abnormalities including decrease inhemoglobin content (7.88±0.18 g/L) on day-1 post-treatment. Significant increase in serum urea (59.75±0.85) and serum creatinine was observed(1.89±0.04). On day-14 post-treatment, LZD induced mild-to-moderate cellular abnormalities in bone marrow, brain, and kidneys. The concurrentoral administration of MEPD and LZD for the same period corrected the hematological, biochemical, and histopathological alterations induced by LZD. Conclusion: It was concluded that MEPD clearly ameliorated these damaging effects induced by LZD

In vitro oslobađanje hidrofilnih i hidrofobnih ljekovitih tvari iz liposomskih disperzija i gelova

A method for determining the rate of hydrophilic and hydrophobic drug entities release from different types of liposomal dispersions and gels using a dialysis method is described. Dibucaine base and 5-fluorouracil were used as model drugs for a hydrophobic and hydrophilic drug, respectively. A dialysis technique was employed. Release rates were affected by the rate of rotation of the paddles of the tablet dissolution tester, temperature, and volume of release medium. The method was used to evaluate the in vitro drug release from hydrophilic and hydrophobic drug entities from liposomal dispersions and gels. The in vitro release study of dibucaine base showed no burst effect, while the in vitro release study of 5-fluorouracil showed a clear burst effect with an initial fast release phase followed by a sustained release phase.Opisana je metoda za određivanje brzine oslobađanja hidrofilnih i hidrofobnih ljekovitih tvari iz različitih vrsta liposomskih disperzija i gelova koristeći dijalizu. Dibukain baza i 5-fluorouracil upotrebljeni su kao modeli hidrofobnog, odnosno hidrofilnog lijeka. Na brzinu oslobađanja utjecala je brzina rotacije lopatica u aparatu u koje je pokus izvođen, temperatura i volumem medija za oslobađanje. Metoda je upotrebljena in vitro praćenje oslobađanja ljekovite tvari iz liposomskih disperzija i gelova. In vitro oslobađanje dibukain baze ne pokazuje učinak naglog oslobađanja, a 5-fluorouracila pokazuje, s brzim inicijalnim oslobađanjem iza kojeg slijedi usporeno oslobađanje

In vitro oslobađanje hidrofilnih i hidrofobnih ljekovitih tvari iz liposomskih disperzija i gelova

A method for determining the rate of hydrophilic and hydrophobic drug entities release from different types of liposomal dispersions and gels using a dialysis method is described. Dibucaine base and 5-fluorouracil were used as model drugs for a hydrophobic and hydrophilic drug, respectively. A dialysis technique was employed. Release rates were affected by the rate of rotation of the paddles of the tablet dissolution tester, temperature, and volume of release medium. The method was used to evaluate the in vitro drug release from hydrophilic and hydrophobic drug entities from liposomal dispersions and gels. The in vitro release study of dibucaine base showed no burst effect, while the in vitro release study of 5-fluorouracil showed a clear burst effect with an initial fast release phase followed by a sustained release phase.Opisana je metoda za određivanje brzine oslobađanja hidrofilnih i hidrofobnih ljekovitih tvari iz različitih vrsta liposomskih disperzija i gelova koristeći dijalizu. Dibukain baza i 5-fluorouracil upotrebljeni su kao modeli hidrofobnog, odnosno hidrofilnog lijeka. Na brzinu oslobađanja utjecala je brzina rotacije lopatica u aparatu u koje je pokus izvođen, temperatura i volumem medija za oslobađanje. Metoda je upotrebljena in vitro praćenje oslobađanja ljekovite tvari iz liposomskih disperzija i gelova. In vitro oslobađanje dibukain baze ne pokazuje učinak naglog oslobađanja, a 5-fluorouracila pokazuje, s brzim inicijalnim oslobađanjem iza kojeg slijedi usporeno oslobađanje