Volume 02, Issue 01, January 2024
Citation Analysis On The Structure, Composition And Habitual Possibilities Of The Martian Atmosphere
Roxy M S a *and Sumithranand V B b
a Department of Physics, Sree Narayana College, Kollam, Research Centre, University of Kerala, Kerala, 691001
b Department of Physics, Government College, Kariavattom, Thiruvananthapuram,Research Centre, University of Kerala, Kerala, 695581
Corresponding author: roxyms@gmail.com
Abstract
The study involves the analysis of soil temperature data collected at various depths with an hourly interval using a hydro-meteorological data acquisition system at the Astronomical Observatory in Thiruvananthapuram. The research reveals that the highest diurnal fluctuation occurs at the surface, with the amplitude of the thermal wave decreasing exponentially with depth. Parameters such as damping depth and the velocity of the diurnal thermal wave are calculated. Additionally, thermal diffusivity of the soil over a six-month period (January 2008 to June 2008) is estimated using the amplitude method (Kaushik et al., 1965). The study investigates the variation of thermal diffusivity with average soil moisture, highlighting that the minimum diffusivity aligns with the period of minimum soil moisture, and an increase in diffusivity is observed with higher moisture content.
Modelling of the electrostatic environment of the moon on the day side and the night side under various solar wind flux conditions
Nandana. H b, Nayana. H b, Sibi K S a ,Rakesh Chandran S. B b*
a Department of Physics,University of Kerala, Karivattom Campus, Thiruvananthapuram, Kerala, India,695007
b PG Department of Physics, Sanatana Dharma College, University of Kerala, Alappuzha, Kerala, India, 688003
* Corresponding author: rakwin@gmail.com
Abstract
The moon is the fifth largest satellite in the solar system and the brightest object in the night sky. The moon possesses mild, dispersed, localized magnetic anomalies but no inherent magnetic field. The lunar surface is subject to a variety of charged particles and radiation. As a result, the lunar surface is electrically charged and immersed in streaming plasma (solar wind). A lunar wake zone faces away from the sun as a result of solar wind interactions with the lunar surface. Due to the dominating current from the electron photoemission induced by solar UV radiation, the lunar surface usually charges to a positive electric potential with regard to the surrounding plasma, whereas the night side surface charges to a negative electric potential. Due to the lack of electron photoemission, plasma electron currents often predominate on the night side of the Moon. Most environments have equal temperatures and concentrations of electrons and ions, but because lighter electrons move more quickly, they provide a greater amount of electron flux to the surface. The solar wind fluxes cause the lunar surface to become charged. varied solar wind conditions result in varied charging behaviours. For both solar energetic particle occurrences and average solar wind circumstances, there are differences in the electron number density and energy of the solar wind electrons. Potential The satellite data will be used to predict the current lunar surface properties under various solar wind circumstances on both the day and night sides of the moon. Additionally, we will examine how fluctuations in surface potential are reflected in the region of the lunar terminator. where the potential changes from having a positive value to a negative value. It is possible to identify a transition region at the terminator, where the charging phenomenon will not occur and the potential value will be negligible.
Dust dynamic theory and levitation mechanism of charged dust grains in lunar plasma field environment
Nayana. H a,b, Nandana. H a,b , Josna Joseph a,b, Sibi K S a , Rakesh Chandran S. B b*
a University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala India,695007
b PG Department of Physics, Sanatana Dharma College, Alappuzha, Kerala India, 688001
* Corresponding author: Rakesh chandran.S.B rakwin@gmail.com
Abstract
Dust particles are electrostatically levitated and carried across the lunar surface by the ambient solar wind plasma, which charges the surface. Since the height of the dust particle is determined by the electric field and plasma sheath near the lunar surface, this process is strongly associated with surface charging. Because it enables the linking of fields and the environment of the particles to the dynamics of the dust grains, the study of the charging of microscopic dust particles is of fundamental interest. Due to the possibility of increased charge and radiation dosage during Solar Experiments (SEPs), dust levitation is a phenomenon of great scientific interest. The knowledge gathered from these investigations will be helpful in reducing the negative impacts of dust on human exploration. Given that increased charge and radiation dosage during Solar Experiments (SEPs) could make dust levitation dangerous, the phenomena is of great scientific interest. The knowledge acquired through these investigations will be helpful in reducing the negative impacts of dust on human exploration.ce and luminescent properties of sputtered films.
Observed Changes in the Convective Parameters over Chennai
Athira Sasikumar a,b and Veena Suresh Babu a*
a PG Department of Physics, All Saints’ College, University of Kerala, Thiruvananthapuram, Kerala, India,695007
b PG Department of Physics and Research Centre, MG College, University of Kerala, Thiruvananthapuram, Kerala, India,695004
* Corresponding author: veenasbabu@gmail.com
Abstract
Different events are happening every time in the atmosphere in which much of them are randomly generated. The studies on thermodynamic environments supporting convection is important for understanding potential changes in a climate. Parameters like Convective available potential energy, Level of free convection, Equivalent temperature, pressure is varying time to time. In this work, we have performed comparative day to day, monthly and seasonal variations of convective parameters by using the data from Chennai region, for the year 2022.The variations in CAPE are connected to the changes in atmospheric energy balance and convective activity, making them a possible indication of climate change. The seasonal fluctuations demonstrate that the CAPE is larger during the monsoon than it is during the pre-monsoon or post-monsoon seasons, which shows that large-scale dynamics and thermodynamic conditions conducive to high CAPE are required for organised monsoon convections across this region. The monsoon rainfall over the Indian subcontinent may be maintained by the systematic growing tendency in CAPE, which may be compensating for weakening of the monsoon circulation.
Green synthesis of Nickel Oxide Nanoparticle for the Adsorption of Water Pollutants
Sreelekshmi A a, Rajalakshmi Soman a, Anagha Ravi a, Darsana S a, Prema K H a*
a Post Graduate Department of Chemistry and Research Centre, Sanatana Dharma College (Affiliated to University of Kerala) Alappuzha, Kerala, India, 688003
* Corresponding author: premakh@gmail.com
Abstract
Green mediated solution combustion method for the development of nanoparticles attained considerable attraction owing to its non-toxic and eco-friendly nature. In this work nickel oxide nanoparticles have been synthesized via green supported method, in which Annona Muricata leaves extract, Simarouba glauca leaves extract, Chromolaena odorata leaves extract and Rutacea leaves extract were serve as the medium. The main attraction of this work is that, the synthesized nanoparticle is free from external capping agents and it reduces the use of toxic reducing agents. Various characterization techniques such as XRD, SEM and EDAX were used to study the morphology and structure of synthesized nanomaterial. XRD pattern confirms the formation of nickel oxide nanoparticles and predicted the face centred cubic structure of the material. Adsorption studies suggested that, nickel oxide nanoparticle is a suitable catalyst for the removal of methylene blue from water.
Citation Analysis On The Structure, Composition And Habitual Possibilities Of The Martian Atmosphere
Roxy M S a *and Sumithranand V B b
a Department of Physics, Sree Narayana College, Kollam, Research Centre, University of Kerala, Kerala, 691001
b Department of Physics, Government College, Kariavattom, Thiruvananthapuram,Research Centre, University of Kerala, Kerala, 695581
Abstract
The concerned study is an analysis of the Red Planet Mars’s atmosphere and its various aspects in the past, present as well future and, thereby, the possibility of life on the planet, which has been done via the citation analysis of related journals and publications with keywords mars, Martian atmosphere, and life. The citation network developed by VOS Viewer is used for the statistical and conceptual analysis of the concerned papers. The studies of the Martian atmosphere have a significant impact on knowing the atmospheric compositions and dust storm activities in the Martian atmosphere. This work can be a valuable reference for further investigation in the field for having a smooth experimental and habitual environment.
A study on Structural and Optical properties of Sr3(VO4)2 ceramic
B. Vasanthi a, b , N. Gopakumar b , P. S. Anjana a[1]
a PG Department of Physics, All Saints’ College, University of Kerala, Thiruvananthapuram, Kerala, India,695007
bPG Department of Physics and Research Centre, Mahatma Gandhi College, University of Kerala, Thiruvananthapuram, Kerala, India, 695004
[1] Corresponding author: psanjanaa@yahoo.com
Abstract
Sr3(VO4)2 ceramic has been synthesized using conventional solid state reaction method. The structural and optical properties of synthesized ceramic done using X-ray diffraction ( XRD), Fourier Transform Infra-Red spectroscopy (FTIR) and UV-Visible absorption spectroscopy. XRD analysis reveals that the synthesized ceramic exists in single phase with rhombohedral structure. The space group is R-3m (166) with lattice parameters a = 5.6197(2) Å and c = 20.103(2) Å. It possess centro-symmetric in crystal structure. The various vibrational bands present in the Sr3(VO4)2 ceramic are identified from FTIR study. The electronic transitions and optical band gap of the ceramic is recorded from UV- Visible spectrum. The ceramic has a direct band gap of 3.23 eV. The synthesized orthovanadates has peculiar role in the field of light emitting diodes, solid state lighting and photocatalytic purposes.
Effect of RF power on the structural, morphological and optical properties of RF sputtered zinc oxide thin films
Sreeja Sreedharan. Ra,b[1]
aDepartment of Physics, Sanatana Dharma College, University of Kerala, Alappuzha, 688 003, Kerala, India.
bDepartment of Optoeiectronics, University of Kerala, Kariavattom, 695 581, Kerala, India
[1] Corresponding author: Email address: sreeja.sreedharan@sdcollege.in (Sreeja Sreedharan R)
Abstract
The properties of the sputtered films are highly influenced by the preparation conditions. An attempt is made to optimize the preparation conditions of RF sputtered ZnO films in terms of RF power. The structural, morphological and optical properties of the films were studied to investigate the influence of RF power on the crystalline quality, surface morphology, transmittance and luminescent properties of sputtered films.
Observed Changes in the Convective Parameters over Chennai
Athira Sasikumar a,b and Veena Suresh Babu a*
a PG Department of Physics, All Saints’ College, University of Kerala, Thiruvananthapuram, Kerala, India,695007
b PG Department of Physics and Research Centre, MG College, University of Kerala, Thiruvananthapuram, Kerala, India,695004
* Corresponding author: veenasbabu@gmail.com
Abstract
Different events are happening every time in the atmosphere in which much of them are randomly generated. The studies on thermodynamic environments supporting convection is important for understanding potential changes in a climate. Parameters like Convective available potential energy, Level of free convection, Equivalent temperature, pressure is varying time to time. In this work, we have performed comparative day to day, monthly and seasonal variations of convective parameters by using the data from Chennai region, for the year 2022.The variations in CAPE are connected to the changes in atmospheric energy balance and convective activity, making them a possible indication of climate change. The seasonal fluctuations demonstrate that the CAPE is larger during the monsoon than it is during the pre-monsoon or post-monsoon seasons, which shows that large-scale dynamics and thermodynamic conditions conducive to high CAPE are required for organised monsoon convections across this region. The monsoon rainfall over the Indian subcontinent may be maintained by the systematic growing tendency in CAPE, which may be compensating for weakening of the monsoon circulation.
Green synthesis of Nickel Oxide Nanoparticle for the Adsorption of Water Pollutants
Sreelekshmi A a, Rajalakshmi Soman a, Anagha Ravi a, Darsana S a, Prema K H a*
a Post Graduate Department of Chemistry and Research Centre, Sanatana Dharma College (Affiliated to University of Kerala) Alappuzha, Kerala, India, 688003
* Corresponding author: premakh@gmail.com
Abstract
Green mediated solution combustion method for the development of nanoparticles attained considerable attraction owing to its non-toxic and eco-friendly nature. In this work nickel oxide nanoparticles have been synthesized via green supported method, in which Annona Muricata leaves extract, Simarouba glauca leaves extract, Chromolaena odorata leaves extract and Rutacea leaves extract were serve as the medium. The main attraction of this work is that, the synthesized nanoparticle is free from external capping agents and it reduces the use of toxic reducing agents. Various characterization techniques such as XRD, SEM and EDAX were used to study the morphology and structure of synthesized nanomaterial. XRD pattern confirms the formation of nickel oxide nanoparticles and predicted the face centred cubic structure of the material. Adsorption studies suggested that, nickel oxide nanoparticle is a suitable catalyst for the removal of methylene blue from water.