Characteristics of electromagnetic ion cyclotron waves in Saturn inner magnetosphere has been investigated here in close proximity of equatorial plane at approximately mid of the E ring near 5Rs by using data sets released by Voyager and Cassini spacecraft. Previous encounter of these spacecraft with Saturn exposed the strong signature of EMIC wave and harmonics believed to be originated within 7.5 Rs due to dominant O + ions and water group ions. Maxwellian ring distribution for pickup ions contributing ring around planet is opted to find unperturbed particle density. Therefore, investigating here growth of obliquely propagating EMIC wave undergoing wave particle mechanism by opting kinetic approach to establish mathematical dispersion model in view of different parameters and extended to comparative study for parallel propagation. Parametric analysis inferred that waves propagating in the oblique direction grows more as compare to parallel propagating waves for the extended value of temperature anisotropy and the angle of propagation with respect to the ambient magnetic field B (at equator) and second harmonic of ion cyclotron waves indicating that the modified ion cyclotron wave shifts the wave spectra to higher side with increase in bandwidth. Study can be carried out to analyze other instabilities to explore magnetospheric dynamics at different radial distances.
Whistlers are believed to be generated by its own and responsible to evolve dynamical properties of magnetized planetary environment. Growing whistler instability can cause other uncertainties in the magnetosphere and evident to be generated by mean of injection events and temperature variance in plasma environment. In this paper the empirical dispersion relation has developed for parallel propagating whistler mode instability in an infinite saturnian magneto plasma in the presence of perpendicular electric field for ring distribution function having non-monotonous nature. Method of characteristics solutions alongside kinetic approach found to be most suitable in order to achieve perturbed plasma states. The perturbed and unperturbed particle trajectories have taken into consideration to determine perturbed distribution function. A remarkable growth rate expression with added hot plasma injection has been calculated in inner magnetosphere near 6.18 Rs. The results obtained using demonstrative value of the parameters suited to the Saturnian magnetosphere have been computed and discussed. Pressure (Temperature) anisotropy is found to be a peculiar source of free energy for whistler mode instability. The AC frequency irrespective of its magnitude, affects the growth rate significantly. The bulk of energetic hot electrons injection influences the growth rate by increasing its peak value. The result obtained provide the important view of wave particle interaction and useful to analyze the VLF emissions observed over a wide frequency range.
The characteristics of obliquely propagating dust acoustic solitary wave in magnetized dusty plasma are analysed by considering the plasma to have electrons, two-temperature ions and massive dust grains with heavy charge. The reductive perturbation technique is used to derive relevant Korteweg-deVries (KdV) equation. The effect of density and temperature of hot and cold ions, angle of wave propagation, and mass, charge and temperature of the dust grains on the soliton characteristic is investigated in greater detail. The situation of electron-depleted plasma is also uncovered.
The chirped-pulse inverse free electron laser (CIFEL) interaction has been investigated by considering a tightly focused chirped Gaussian laser pulse and a helical undulator in vacuum. We consider the more realistic description of a laser, i.e., seventh-order calculation in the spatial term and first-order calculation in the temporal term. Numerical calculations show that better electron acceleration can be achieved using a tightly focused chirped Gaussian laser pulse in the CIFEL scheme. The investigation shows that a 10 MeV electron can be accelerated up to a few giga-electron volts energy with the present available laser parameters.
The dust acoustic solitary waves are theoretically investigated in dusty plasmas for different cases of with and without density gradients. These low-frequency solitary waves are studied using appropriate Korteweg–de Vries equations obtained using relevant stretched coordinates. The soliton solutions in homogeneous plasma, weakly inhomogeneous plasma and strongly inhomogeneous plasma, are thoroughly investigated for studying the effect of different parameters like dust charge and density of all the plasma species on the soliton profiles. The combination of the dust charge with its number density changes the dynamics of the solitons and that is further affected by the number density of the hot ion with respect to the cold ions.
This work presents a comparative study of homogeneous and inhomogeneous plasmas for the effect of different plasma parameters on the phase velocity of dust acoustic wave. For the inhomogeneous plasma the growth rate of the dust acoustic wave is intensely studied and the role of components of plasma i.e. inertialess isothermal electrons, inertialess ions at two temperature and massive dust grains with heavy charge is observed on the phase velocity. The general dispersion relation is the guiding factor for the detailed study of dust acoustic wave which is obtained using normal mode analysis.
The Cassini spacecraft observed electromagnetic ion cyclotron waves in Saturn's inner magnetosphere. EMIC waves have frequencies close to the frequency of water-group ions, they are left-handed, and, in most areas, they propagate to the ambient magnetic field at small angles. Their origins are explained by the ion cyclotron instability generated by the water group ions extracted from Saturn's neutral clouds. These waves propagate no more than 5 at an oblique angle to the magnetic field. These fluctuations can be identified as the n = 2 mode resulting from the ring distribution of the picked-up ions. In this work, we studied the characteristics of these waves. We also use kinetic method analysis to assess growth rates. The results obtained for the demonstration values of the parameters suitable for the Saturn magnetosphere have been calculated and discussed. It is assumed that temperature anisotropy is an additional free energy source for ion cyclotron instability. Regardless of the magnitude, the AC frequency can significantly affect the growth rate. The drift velocity also seems to affect the growth rate. This result is important to explain the VLF emissions observed over a wide frequency range.
A suit of six applications are presented on the 32” high definition screen surrounded by a framed encasing that contains speakers and a webcam. These apps include weather, Twitter, news, to-do list, calendar, and music. The smart mirror application by is run from a central computer with Windows 8.1 which features a multi-core CPU, solid-state memory, and wireless connectivity. The application can be interacted with use of the Leap Motion controller. This controller allows for touch-free control of the smart mirror by use of finger swipes, taps, and circles. There is also the option to use voice control to play music, post a tweet, or add a task to the to-do list. Finally, the mirror monitors its own temperature and humidity levels so that if the bathroom becomes potentially harmful to the computer's hardware, it can execute preventive measures and shut the system down.
‘Managerial Leadership’ takes an Organization to greater heights, towards the achievement of vision and mission of the Organization. The study aims to assess the perception of the employees about leadership effectiveness in relation to the employee’s satisfaction at BHEL. The study also identifies areas of strengths and need for the improvements in different aspects of leadership which may help in improving the satisfaction level of the employees and hence, better performance at the work place. The LSQ (Leadership Survey Questionnaire) has been used to identify Leadership styles in the organization. The LSQ was sent to the different executives at both the sites and at the Head quarter. The study was conducted at the executive level (E1-E8) at 35 sites. The study concluded that a statistical significant relationship exists between transformational leadership and some factors of employee satisfaction. It found that a statistically significant relationship exists between leadership style and employee satisfaction levels in BHEL.
Very low frequency electromagnetic waves in the magnetosphere of Saturn are the focus of the present study. Hot injected beam effect on these waves like whistler mode waves for relativistic and non-relativistic subtracted bi-Maxwellian distribution function have been studied in the presence of perpendicular A.C electric field. By using the method of characteristics solutions and kinetic approach, expression for dispersion relation and growth rate has been derived via detailed calculations and derivations. By changing parameters of plasma like: ac frequency, thermal anisotropy, number density, parametric analysis has been done. The influence of AC frequency on Doppler shift is analyzed, and the comparative study of the effects of oblique and parallel propagating waves on the growth rate has been done. Some different results were found using the subtracted bi-Maxwellian distribution function discussed with the results of bi-Maxwellian distribution function. It can be seen that the effective parameters for generating whistler mode waves are not only temperature anisotropy, but also relativistic factor, alternating field frequency, subtracted distribution amplitude and the width of the loss cone distribution function, which have been discussed in the results and discussion section.
: The aim of the study is to find the relationship between organizational culture and employee performance and how the employee engagement helps in organizational culture on employee performance. Methodology: The methodology of the study is exploratory and descriptive designs to find out the relationship between organization culture and employee engagement and organization culture and employee performance. Findings: There is a strong relationship between organizational culture and employee engagement and there is a strong relationship between organizational culture and employee performance. Recommendation: Organization culture is the driving force for establishing communication across all the departments to coordinate and to achieve organizational goals and objectives. Mangers are the key players to translate the company‟s need to the executives so that the executives can deliver what is expected from them. Employee engagement is important for motivating employees, and through such programs employees skills, knowledge can be improved. inferred strong between „objectives and of the company are aligned with respect & Organisation is at using employee and The study conducted at BPS in Coimbatore involving 137 employees, investigates employee performance with respect to employee engagement and organization culture. The study used quantitative data analysis to draw the findings; the findings revealed that employee‟s performance is influenced by employee engagement and organization culture. Organization culture is the driving force for establishing communication across all the departments to coordinate and to achieve organizational goals and objectives. Mangers are the key players to translate the company‟s need to the executives so that the executives can deliver what is expected from them. Employee engagement is important for motivating employees, and through such programs employees skills, knowledge can be improved. When employees are skilful to deliver what they are expected, company‟s production and quality of service and values can be improved so that employees and the company are mutually benefited.
Noise pollution due to road traffic is a potential threat to human health. Since it is a global hazard, the rapid urbanization and exponential traffic growth have aggravated the problem. Population residing along the busy traffic lanes is continuously exposed to the sound levels which are above the permissible limits. This constant exposure to noise pollution is a cause of concern as it leads to several adverse impacts on human health. Traffic noise causes irritation and annoyance, sleep disturbances, cardiovascular disease, risk of stroke, diabetes, hypertension and loss of hearing. It results in decreased work performance. The present review highlights the serious health hazards of road traffic noise (RTN) which needs to be curbed. Preventive measures of noise pollution can help in combating noise-induced health hazards and increased work performance.
Objective: Our main objective is to do X-ray diffraction (XRD) analysis of polyethylene terephthalate (PET) fibres obtained from different manufacturers in India. It is to determine whether this physical characteristic could be used in differentiating these fibres of one type or not. Method: X-ray diffraction patterns of the fibres of 8 samples were obtained using a Phillips PW 1840 X-ray Diffractometer. Findings: The results indicate that X-ray diffraction method may not provide definite clue to the identification of fibres, which are chemically similar but originating from different sources. However, more detailed studies are required in order to confirm the inappropriateness / appropriateness of the X-ray method. On the other hand, we have differentiated these fibres based on their tensile behaviour.Applications: The method has applications in forensic science investigations for identification and comparison of PET fibres. Keywords: Degree of Crystallinity, Polyethylene Terephthalate (PET) Fibres, X-ray Diffraction (XRD)
Objectives: To develop a robust, feasible and stable conjugate of functionalized Carbon Nanotube (f-CNT) and Supramolecular Nucleic Acid (DNA) which are compatible with each other in behavior. Method: A basic computational model of above mentioned conjugate is prepared with the help of Hyperchem® 7.5 obtained by steepest descent algorithm. Findings: This f-CNT-DNA conjugate model was then used to study various QSAR properties of CNT-DNA like molar refractivity, polarization, volume, Hydration Energy, Surface Area and Log P values to show its viability and potential in various biotechnical applications. Applications: Various conjugate models are studied and detected its feasibility and stability to work as a carrier for various biotechnical applications, ranging from biological transporters as a drug carrier and biosensors.Keywords: Computational modeling, Deoxyribose Nucleic Acid (DNA), f-CNT-DNA Conjugate, Functionalized Carbon Nanotubes (f-CNT), Hyperchem
Sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) solution (1:1 ratio by volume) based texturization process at 80–82°C is an easy, low cost and comparatively new and convenient option for fabrication of any multicrystalline silicon (mC-Si) solar cell. In the present study atomic force microscope is used to observe the intragrain surface in a miniscule area (3μm×3μm) of NaOH–NaOCl textured surface by two and three dimensional analysis, roughness analysis and section analysis. The r.m.s value of the surface parameter of 7.0nm ascertains the smoothness of the textured surface and further the surface reflectivity is minimized to 4–6% in the 500–1000nm wavelength range by a proper silicon nitride anti-reflection coating. Comparing with the standard HF–HNO3–CH3COOH acid textured cell, the NaOH–NaOCl textured cell shows a comparatively lower value of series resistance of 7.17mΩ, higher value of shunt resistance of 18.4Ω to yield a fill factor of 0.766 leading to more than 15% cell efficiency in the industrial cell processing line. This AFM study yields different surface roughness parameters for the NaOH–NaOCl textured wafers which can be used as a reference standard for optimized texturing.