On fractional kinetic equations     

R.K. Saxena  A.M. Mathai  H.J. Haubold 《Astrophysics and Space Science》2002,282(1):281-287

The subject of this paper is to derive the solution of generalized fractional kinetic equations. The results are obtained in a compact form containing the Mittag-Leffler function, which naturally occurs whenever one is dealing with fractional integral equations. The results derived in this paper provide an extension of a result given by Haubold and Mathai in a recent paper (Haubold and Mathai, 2000). This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Lithological and Structural Controls on the Genesis of Emerald Occurrences and their Exploration Implications in and around Gurabanda Area,Singhbhum Crustal Province,Eastern India     

Shreeram Suman Sahu  Sahendra Singh  Jyoti Sankar Satapathy 《Journal of the Geological Society of India》2018,92(3):291-297

Emerald, the green gem variety of beryl (Be₃Al₂Si₆O₁₈), is the third most valuable gemstone after diamond and ruby. The green colour appearance of the crystal is due to trace of Cr³⁺ and V³⁺, which replaces Al³⁺ ions in the crystal lattice of beryl. The hue of green colour of emerald depends on the quantity of Cr³⁺ and V³⁺ present in the crystal. Be is incorporated along with Cr and/or V during the process of crystallization. Since Be is relatively rare in the upper continental crust, therefore specific geological and geochemical parameters are required for Be to be incorporated in the crystal lattice of emerald.The present work was carried out to understand the lithological and structural control of emerald occurrences in and around Gurabanda area within the Singhbhum shear zone (SSZ) of Singhbhum crustal province, eastern India. The biotite and serpentine schist belong to the Paleoproterozoic Dhanjori Group and constitute the major lithology of the area. Pegmatite and biotite schist contains a variety of gem minerals in abundance in the area and the gem quality emerald occur at the contact zone of quartz vein and mica-schist. Lithology and structure are the main controlling factors of gem-mineralization in the study area. The study indicates that regional metamorphism and deformation processes along the shear zone played a significant role in the formation of emerald deposits. It is inferred that Singhbhum shear zone facilitated a favourable condition, where the Be bearing pegmatites interacted with Cr bearing mica schist or ultramafic rocks to produce emerald crystal.  相似文献   

Geology and tectonic implications of tourmaline bearing leucogranite of Bastipadu,Kurnool, Andhra Pradesh,India     

Kiran Jyoti Mishra  Santanu Bhattacharjee  M S Reddy  M N Praveen  A D Bhimte  N Mahanta 《Journal of Earth System Science》2018,127(6):87

Tourmaline bearing leucogranite occurs as a pluton with pegmatitic veins intruding the Archaean granodiorite in the Bastipadu area, Kurnool district of Andhra Pradesh. We present field and petrographic relations, mineral chemistry and geochemical data for the leucogranite. It is essentially a two-mica granite, composed of quartz, perthite, microcline, albite, tourmaline and muscovite along with minor biotite and titanite. The euhedral tourmalines are regularly distributed in the rock. The geochemical studies show that the leucogranite is calc-alkaline, peraluminous to metaluminous which formed in a syn-collisional to volcanic arc-related setting. It displays strong ‘S’ type signatures with high K/Na ratios, moderately fractionated light rare earth elements, relatively flat heavy rare earth elements with \(\hbox {[Ce/Yb]}_\mathrm{N} \le 27.8\) and a strong negative Eu anomaly. The geochemical characteristics indicate that the leucogranite melt might have been generated from partial melting of metasediments. Electron probe microanalyser data show the presence of alkali group tourmaline in leucogranite represented by schorl and dravite. Tourmaline compositions plot in the Li-poor granitoids and associated pegmatites and aplites and metapelites/metasammites fields. Partial melting of boron-enriched source rocks is linked with the development of tourmalines in the leucogranite.  相似文献   

Bioslurry phase remediation of petroleum-contaminated soil using potato peels powder through biosurfactant producing <Emphasis Type="Italic">Bacillus licheniformis</Emphasis> J1     

Amar Jyoti Das  Rajesh Kumar 《International Journal of Environmental Science and Technology》2018,15(3):525-532

Soil contamination due to petroleum oil has become significant ecological issue due to their toxicity. Thus, detoxification of petroleum-contaminated soil is of pressing concern. In this study, bench-scale bioslurry experiment was carried for remediation and detoxification of petroleum-contaminated soil. Potato peels powder was used as organic nutrient source in the slurry for biostimulation purpose, while biosurfactant producing Bacillus licheniformis strain J1 identified through molecular approach is used as inocula in the slurry treatment. The strain J1 has the capability to utilized petroleum as carbon source, but its efficiency increase in the presence of potato peels powder. Bioslurry phase experiment was categorized into four groups based on the treatment, such as B0 (soil + H₂O), B1 (soil + petroleum oil + H₂O), B2 (soil + petroleum oil + strain J1 + H₂O), B3 (soil + petroleum oil + potato peels powder + strain J1 + H₂O). After 90 days of treatment, the soils from each treatment were subjected to toxicity analysis using earth worm acute toxicity test and seed germination inhibition assay. The results suggest that in B1 treatment the toxicity effect on germination and seedling growth is highest, while decrease in effect was observed in case of B2 and B3 treatment. Results of earthworm acute toxicity test revealed that 30 ± 5% earthworm survival rates was reported in B1 treatment, whereas 71.6 ± 2.8 and 78.3 ± 2.8% was observed in B2 and B3 treatment, respectively. Hence, the result of the present study signifies that bioslurry phase treatment can be effectively and commercially used for detoxification petroleum-contaminated wastelands.  相似文献   

Analysis of Beams on Pasternak Foundation Using Quintic Displacement Functions     

Dutta  Ashis Kumar  Mandal  Jagat Jyoti  Bandyopadhyay  Debasish 《Geotechnical and Geological Engineering》2021,39(6):4213-4224

Geotechnical and Geological Engineering - Beams supported by elastic foundations one of the complex soil-structure interaction problems and analysis carried out using the concept of “beam on...  相似文献   

Rationale for measurement of midocean tsunami signature     

Adam Zielinski  Narendra Saxena 《Marine Geodesy》2013,36(3-4):331-337

Abstract

Arguments are presented to justify midocean tsunami measurements and related investigations aimed toward improvement of tsunami prediction and warning. It is postulated that midocean tsunami signatures be measured simultaneously at several locations and correlated with high‐accuracy onshore measurements.  相似文献   

Some theoretical approaches to delineate tsunami hazard in the Pacific Ocean     

N. K. Saxena  T. S. Murty 《Marine Geodesy》2013,36(2-3):173-180

Abstract

In the recent seismological literature, several articles appeared which suggested that major earthquakes are likely to occur in the near future, in the various seismic gaps around the rim of the Pacific Basin. Although the direct effects of these earthquakes may be confined to local areas, the tsunamis that will generate are expected to travel Pacific Ocean wide and cause great destruction even at far off places around the Pacific Ocean. Here, the various approaches to delineating the tsunami hazard are discussed and some suggestions are made.  相似文献   

Bathymetry Data Correction Using Global Optimization Method     

Atanu Basu  N. K. Saxena 《Marine Geodesy》2013,36(1-2):37-60

The bathymetry data of marine bodies have been collected over a century, and the collected data have a wide range of resolution and accuracy. Acquisition of bathymetry data is very costly and time-consuming. One can use the old, low-quality bathymetry data to fill the gap in high-quality, recently acquired bathymetry data after correcting the old data to improve its quality so that it is comparable to the high-quality data. The old data correction can be treated as a nonlinear inverse problem. Simulated annealing (SA) global optimization method was used here in solving this problem. The two sets of data that were used are project survey (PS) and Vietnamese Navy Chart (VNC) data. The PS data were collected in 2000 in an offshore survey from the Vietnam coast in the South China Sea (SCS). The VNC data were obtained by digitizing VNC that was published in 1981. Inverse distance weighted (IDW) interpolation method was used for forward modeling. Weperformed the SA algorithm run starting at a high "temperature," then lowering the "temperature" gradually up to the "critical temperature" and then staying there for the rest of the run. The best model chosen by the algorithm showed an improvement of 63% from the original model. We then constructed a digital bathymetry model (DBM) of the study area with the combined corrected VNC and the PS data.  相似文献   

Effects of rotation and tidal distortion on the periods of small adiabatic oscillations of the polytropic models of the stars     

C. Mohan  R. M. Saxena 《Astrophysics and Space Science》1985,113(1):155-169

The averaging technique of Kippenhahn and Thomas (1970) has been used in conjunction with Kopal's method of evaluating various parameters on the Roche equipotentials to determine the effects of rotation and tidal distortions on the periods of small adiabatic radial and nonradial modes of oscillations of polytropic models of the stars.  相似文献   

Effect of rotation and tidal distortions on the structure of polytropic stars     

C. Mohan  R. M. Saxena 《Astrophysics and Space Science》1983,95(2):369-381

The averaging technique of Kippenhahn and Thomas has been used in conjunction with Kopal's method of evaluating various parameters on the Roche equipotentials, to determine the effects of rotation and tidal distortions on the shapes and structures of the polytropic models of the stars.  相似文献