Spin-Charge Decoupling and Orthofermi Quantum Statistics

Currently Gutzwiller projection technique and nested Bethe ansatz are two main methods used to handle electronic systems in the $U$ infinity limit. We demonstrate that these two approaches describe two distinct physical systems. In the nested Bethe ansatz solutions, there is a decoupling between the spin and charge degrees of freedom. Such a decoupling is absent in the Gutzwiller projection technique. Whereas in the Gutzwiller approach, the usual antisymmetry of space and spin coordinates is maintained, we show that the Bethe ansatz wave function is compatible with a new form of quantum statistics, viz., orthofermi statistics. In this statistics, the wave function is antisymmetric in spatial coordinates alone. This feature ultimately leads to spin-charge decoupling.Comment: 12 pages, LaTex Journal_ref: A slightly abridged version of this paper has appeared as a brief report in Phys. Rev. B, Vol. 63, 132405 (2001

Improvement of Atmospheric Pollution in the Capital Cities of US during COVID-19

The spread of COVID-19 during 2020 impacted the whole world and still affecting the lives of people living in some parts of the world. The spread of this epidemic started in the US in late March 2020 and became a major issue in April due to an outburst of COVID-19 cases. Most of the countries in the world imposed complete to partial lockdown, but in the US, few states imposed lockdowns. Even after the advisory of the various Government department, the mobility data suggest that there was an enhancement (10–15%) in mobility during March 2020. Later sudden drop in mobility was observed during April 2020. The fall in aerosols optical depth (AOD), particulate matter concentration, NO2, and Ozone are observed along with the positive shifts in the SO2. In some of the states, AOD shows pronounced decline during May and June (5–40.90%), in the month of May more than 80% decline was observed compared to the month of June 2020. In the month of April 2020, up to 73.64% decline was observed in NO2, and 70–99% in the months of May and June 2020. We found a good relationship between the mobility data and improvement in the air quality of the US. The changes were not significant compared to other countries in the world due to scattered lockdown policy, but in the US a pronounced change is observed during April month compared to March and May

Unstable dTMP auxotrophs in Neurospora crassa

Unstable dTMP auxotrophs in Neurospora crass

Effect of Surfactants on the Fluorescence Intensity of 9,10-Diphenylanthracene

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Occurrence of Streptomyces aurantiacus in Mangroves of Bhitarkanika

Thirteen strains of Streptomyces were isolated from phyllosphere of nine mangrove tree species found in Bhitarkanika mangrove ecosystem of Orissa. According to physiological, biochemical data, all 13 of the isolates were taxonomically identified to the genus Streptomyces as aurantiacus species. All strains are grayish, spirals and forming amorphous colony. Almost all utilized araginose, produced H2S, resistant towards rifampicin and penicillin, urea except few strains. However, they exhibited different extracellular activity like phosphate solubilization, lipase and L asparaginase production. This is a unique report from this mangrove ecosystem as far as Streptomyces occurrence is concerned

Impact of grant-in-aid projects at CSIR-National Metallurgical Laboratory, India: A bibliometric study

The purpose of this study is to evaluate the impact of 204 Grant-in-Aid projects carried out at CSIR-National Metallurgical Laboratory, India during 1995-2010 through Bibliometric method. Unearths the impact of projects in the light of current needs to sustain in future. The data pertaining to study were generated through structured questionnaire. The output-identified as deliverables of each project includes, cash flow, process developed, patents, copyright, and technology transferred, academic contribution and research papers published through projects .The quality of papers were traced out through citation and impact factor. The Projects have been classified at different level of research- basic research, applied research, industrial research. The data further presented according to the level of research to accommodate 204 projects. The duration of the projects ranged from 6 months to 5 years. A group of 27 subject areas have been identified for all the projects, fall in the domain of Metallurgy and Materials Sciences and allied subjects .The value of projects were estimated around 55 Crore Rupees. About 97% projects were accomplished in scheduled time. The R&D output reflects that 55 processes were developed and only one technology could be transferred. However 21 technologies are under negotiation for transfer to different parties. During the tennure of projects, 40 patents and 14 copyrights were filed. About 58 students from various reputed academic institutions were benefited through projects. A total of 608 research papers were reported based on projects findings. The trends of publications during 16 years show that SCI papers are in increasing trends and reflects a healthy sign as performance indicators of the sponsored projects. The projects under basic research contributed a maximum of 226 papers with 845 citations, shared 64.50% of the total 1310 citations. The average impact factor of papers was 1.552. The highly cited papers published in the area of water quality-assessment, received 88 Citations, other highly cited papers fall in the domain of corrosion protection and prevention, waste management and utilization and materials science and technology. The output of the present work will be useful for scientists and decision makers to judge the impact of Grant- in- Aid projects in the light of current global scenario and making project selection mechanism more effective by tailoring to the current needs of the society

Usage Pattern of Information Resources at CSIR- National Metallurgical Laboratory,Jamshedpur, India

The collection development policy for Knowledge Resource Centre can be made by applying various value added analysis. This study primarily focus on the current usage of information resource at National Metallurgical Laboratory through citation analysis of research papers. The output of the study set forth a collection development tool for applying in acquisition policy...

Interplanetary and Geomagnetic Consequences of Interacting CMEs of 13-14 June 2012

We report on the kinematics of two interacting CMEs observed on 13 and 14 June 2012. Both CMEs originated from the same active region NOAA 11504. After their launches which were separated by several hours, they were observed to interact at a distance of 100 Rs from the Sun. The interaction led to a moderate geomagnetic storm at the Earth with Dst index of approximately, -86 nT. The kinematics of the two CMEs is estimated using data from the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) onboard the Solar Terrestrial Relations Observatory (STEREO). Assuming a head-on collision scenario, we find that the collision is inelastic in nature. Further, the signatures of their interaction are examined using the in situ observations obtained by Wind and the Advance Composition Explorer (ACE) spacecraft. It is also found that this interaction event led to the strongest sudden storm commencement (SSC) (approximately 150 nT) of the present Solar Cycle 24. The SSC was of long duration, approximately 20 hours. The role of interacting CMEs in enhancing the geoeffectiveness is examined.Comment: 17 pages, 5 figures, Accepted in Solar Physics Journa