The current study was carried out at Rezu Khal to determine the ideal area for seaweed farming. Additionally, this investigation uncovered species of commercially productive and lucrative seaweed. Temperature, salinity, pH, dissolved oxygen (DO), conductivity, and Formazin Nephelometric Units (FNU) of surface water ranged from 20.9 to 26.2°C, 24 to 26.2‰, 6.45 to 8.5, 92 to 105%, 33,256 to 64,267 µS/cm, and 11.1 to 42.8, respectively. Phosphate-phosphorus concentrations in surface water were 2.6–7.6 mg/L, 0.04–0.12 mg/L for nitrate-nitrogen, 0.002–0.04 mg/L for nitrite-nitrogen, 0.15–0.83 mg/L for silica, and 0.13–0.28 mg/L for ammonia. Three seaweed species (Gracilaria lemaneiformis, Hypnea musciformes, and Sargassum oligocystum) were cultivated in the selected areas. Two methods (net and long-line) were used for the culture. In this study, 15–20 kg of G. lemaneiformis were harvested every 15 days using the net method. H. musciformes gained 4 to 12 kg every 15 days. Although S. oligocystum thrived nicely, it was challenging to maintain its viability. The findings of this study indicate that seaweed farming is feasible and coastal residents may participate in seasonal income-generating endeavours in coastal waters.

The ab initio calculations were performed using Cowan’s computer code for ground configuration5d⁴6s incorporating other interacting even parity configurations 5d³6s² and 5d⁵, also for the three lowest excited configurations5d⁴6p, 5d³6s6p and 5d³6s5f of odd parity matrix. The initial energy parameter scaling applied for E_av and ζ at 100% of the HFR values and F^k at 85%, G^k and R^k at 75% of the HFR values. The reported values of levels were taken from NIST ASD levels list. The levels were used to run least square fitted (LSF). This allowed adjusting the energy to the real values and hence a better prediction was achieved.

Previously reported atomic data (spectral lines, wavelengths, energy levels, and transition probabilities) were collected and systematically analyzed for Cs VI. The present theoretical analysis was supported by extensive calculations made for Cs VI with a pseudo-relativistic Hartree–Fock (HFR) method together with the superposition of configuration interactions implemented in Cowan’s codes. In this work, all previously reported energy levels and their (allowed) transition assignments were confirmed. A critically evaluated set of optimized energy levels with their uncertainties, observed and Ritz wavelengths along with their uncertainties, and theoretical transition probabilities with their estimated uncertainties were presented in the compilation. In addition to this, we determined the radiative transition parameters for several forbidden lines within the ground configuration $5s^{2}5p^2$ of Cs VI.

Energy levels and emission line wavelengths of high-Z materials are useful for impurity diagnostics in the next generation fusion devices. For this here we have calculated E1, M2 transitions, oscillator strengths, and transition probabilities for transitions among the terms belonging to the 2p⁶3s², 2p⁶3s3p, 2p⁶3p² and 2p⁶3s3d for the Magnesium like cerium (Ce XLVII) using the GRASP2K package based on the fully relativistic multi-configuration Dirac–Fock method. The electron correlation effects, Breit interaction and quantum electrodynamics effects to the atomic state wave functions and the corresponding energies have been taken into account.

The spectroscopic data of tungsten (W) is important for plasma science, as it is used as a diverter and in ITER. We have recorded the spectrum of tungsten on a 1.5-m Wadsworth spectrograph in the 2100--4900 Å wavelength range. The ground configuration of the neutral tungsten is 5d\({}^{4}\)6s\({}^{2}\). First excited configurations in the odd parity system are 5d\({}^{3}\)6s\({}^{2 }\)(6p + 7p + 5f + 6f) + 5d\({}^{4}\)6s6p. The 5d\({}^{4}\)6s6p configuration has already been studied. We have identified hundreds of lines in this spectrum and confirmed fifty nine levels of the 5d\({}^{4}\)6s6p configuration. Relativistic Hartree-Fock (HFR) and least squares fitted (LSF) parametric calculations were carried out to interpret the observed spectrum. We have found good agreement with the previously published data.

The ground configuration of neutral tungsten is 5d⁴6s². The first excited configurations in the odd parity system are 5d³6s² (6p+7p+5f+6f)+5d⁴6s6p. Further excitation leads to large number of configurations. However the configuration 5d⁵6p belonging to the odd parity was obtained by doubly exciting the 5d⁴6s6p configuration. Relativistic Hartree–Fock (HFR) and least squares fitted (LSF) parametric calculations were carried out to interpret the observed spectrum recorded on a 1.5-m Wadsworth spectrograph at our laboratory in the wavelength region 2300Å to 4500Å. We confirmed the earlier reported ground configuration 5d⁴6s² and excited configuration 5d⁴6s6p. Almost fifty new transitions establishing 22 energy levels belonging to the configuration 5d³6s²6p have been identified.