Avanti Publisher - Academia.edu (original) (raw)

Papers by Avanti Publisher

Global Journal of Earth Science and Engineering, 2014

In this paper, a regional model to assess groundwater resources of the shallow groundwater system... more In this paper, a regional model to assess groundwater resources of the shallow groundwater system of
Beauvais in the North of France has been satisfactorily completed using geophysical surveys and numerical modeling
using MODFLOW-2000. A three-dimensional flow model has been developed for this aquifer using a large amount of
available geological and hydrological data. The numerical flow model was calibrated and validated with datasets during
1998–2010. The calibration was done both by the automated parameter PEST and by the trial and error process. The
main objective is to quantify the components of the groundwater mass balance, to estimate the hydraulic conductivity
distribution and to characterize the hydrologic system. Furthermore, MODFLOW model was used to estimate the
recharge, discharge, base flow and water Table fluctuation. Numerical simulations indicate that the Canada lake, located
in the Thérain valley, acts as a most discharge area for regional groundwater flow. Groundwater inflow from the recharge
from Beauvais plateau which is mainly due to precipitation supplies the aquifer with most of its water. Following the
calibration process, a sensitivity analysis was carried out. The results show that the aquifer exhibits the highest
sensibility to the recharge parameters changes and hydraulic conductivity. The impact of the changes for both these
hydraulic parameters appears to differ from large decrease to large increase in total groundwater discharge. The delicate
shifts in the groundwater systems, which cause the changes in the recharge and discharge, clearly show the need for
hydrological modeling.

Global Journal of Earth Science and Engineering, 2014

Earthquakes are the most destructive natural disaster causing lot of casualties, injuries and eco... more Earthquakes are the most destructive natural disaster causing lot of casualties, injuries and economic losses leaving behind a trail of panic. Earthquake risk assessment is needed for disaster mitigation, disaster management, and emergency preparedness. Vulnerability of building is one of the major factors contributing to earthquake risk. The vulnerability functions framed for a particular building is input parameter for loss estimation. Procedure for developing fragility curves of specific building type is discussed. Seismic fragility curves were developed and damage probability threshold has been constructed for the chosen problems.

Global Journal of Earth Science and Engineering, 2014

The Glauconitic sandstone is well exposed in the Newari area of Sonbhadra district of Uttar Prade... more The Glauconitic sandstone is well exposed in the Newari area of Sonbhadra district of Uttar Pradesh, India. Conjugate pairs of kink bands are confined within the laminated sandstone and are present half km west of Newari near the confluence of a tributary with the Son river. The conjugate kink bands are plunging at 13 0 and 36 0 in SE (S58 0 E) and NE (N56 0 E). This shows that ephemeral compressional stress regime was responsible for the development of conjugate set of kink bands. The stress axis would have been oriented from NE-SW direction. A major fault F1 passes through the glauconitic sandstone in the west of the Newari village. This fault is a reverse fault and strikes at N25ºW-S25ºE. Another fault F2 oblique to F1 passes in the direction N70ºE-S70ºW. In view of the fact that the kink bands are confined within the laminated sandstone, it is inferred that they have been formed as a result of penecontemporaneous deformation and suggest seismic activities that might have occurred around 1080±40 Ma ago as a result of activation of the faults present in the Newari area of the Sonbhadra district, Uttar Pradesh, India those may be companion faults of the Son-Narmada Fault system.

Global Journal of Earth Science and Engineering, 2014

Texture (grain size) is one of the many parameters, which is used in determining depositional env... more Texture (grain size) is one of the many parameters, which is used in determining depositional environments of sediments and sedimentary rocks. In the present investigation, texture was analysed from sixteen stations in the Khurar River, Madhya Pradesh, India. Here, grain size analysis was carried out employing mechanical sieving method using a sonic shaker. Frequency and cumulative frequency curves were prepared from the grain size data on centimetre and arithmetic probability papers, respectively. The phi values were determined and used to calculate the statistical parameters such as mean, standard deviation, skewness and kurtosis. It is found that the mean size value varies from-0.63to 0.80 with a graphic mean distribution ranging from-0.27 to 0.40 , indicating that the size of the river sand is very coarse to coarse-grained. The standard deviation (sorting) shows a range of 0 .69 to 1.65. The skewness values of the sediment samples range from 0.19 to 0.29 , thus, indicating the presence of fine fraction to near-symmetrical fraction in the population. The kurtosis varies between 1.03 and 1.09 , indicating that 25% of the samples are leptokurtic, 6.25% are very leptokurtic, 50% are mesokurtic and 12.5% are platykurtic. The platykurtic nature in few cases suggests mixing of sediments from two sources. Bivariate plots prepared combining various textural parameters were used to interpret their behaviour in the river sediments. CM plot was also prepared to understand the dominant mode of sediments transportation in the Khurar River. In this river, all the sediments are dominantly characterized by the rolling process of transportation. This study reveals that sorting varies from poorly sorted to moderately well sorted in the course of the river may be because of dominance of winnowing and selective sorting in the lower reaches of the river.

Global Journal of Earth Science and Engineering, 2014

A genetic type of Cenozoic gold mineralization related to mud volcanoes is suggested to be recogn... more A genetic type of Cenozoic gold mineralization related to mud volcanoes is suggested to be recognized in the Lena area. This type of mineralization has never before been distinguished in the area and is genetically related to the development of depression mud-volcano structures on the northern continuation of the Baikal rift. Geologicalgeophysical data and results of lithological-petrographic and mineralogical studies of the mud-volcano lithological complex, naturally occurring microscorias, and ore minerals from the loose Quaternary rocks, as well as and comparison of the chemical composition of the latter with analogous minerals from the Sukhoi Log and Pervenets gold deposits, prove genetic links of economic placer deposits in the Lena area with mud volcanoes.

Global Journal of Earth Science and Engineering, 2014

An alternative to solve the problem of disposing dredged marine sediments (DMS) in open sea, whic... more An alternative to solve the problem of disposing dredged marine sediments (DMS) in open sea, which could lead to undesirable contamination and destruction of the marine ecosystem, is to reuse the material in reclamation works. For such applications, it is important to determine the time required for strength gain of the relocated DMS. A labbased study was conducted to simulate and examine the post-consolidation hardening of DMS when placed as a backfill with relation to time. A separate series of tests were also carried out on the DMS being lightly solidified with cement, with the purpose of identifying potential shortening of the waiting period. The DMS sample was prepared at different water contents based on the soil's liquid limit (LL = 54.5 %), i.e. 0.90, 1.25 and 1.81LL. The undrained shear strength was measured using the laboratory vane shear (VS) test. Complementary fall cone (FC) tests were conducted for additional information on the improved remoulded strength and stiffness of the DMS. The results showed that the strength and stiffness (cone penetration resistance) of the relocated DMS could effectively improve with time, though the rest period required is shorter for a sample with lower initial water content. On the other and, light cementation shortened the rest period, and significantly improved the strength and stiffness at dosages as low as 5 % (as per dry weight of the soil). Overall the study gave an overview of the reusability of DMS as a backfill material in reclamation works, whether with or without lightly induced solidification, depending mainly on the limitations of rest period available.

Global Journal of Earth Science and Engineering, 2014

Authors are returning to the basic concepts of turbulence – homogeneity and symmetry principles. ... more Authors are returning to the basic concepts of turbulence – homogeneity and symmetry principles. It is shown
that the homogeneity in the sense of constant mean velocity gradient (instead of constant velocity) permits to introduce
mirror asymmetry. This way is corresponding to stratified atmosphere and to differential volume in any continuum model.
The basic ideas of A. N. Kolmogorov do not contradict to such an approach. Moreover, the use of the intrinsic eddy
angular velocity (so-called spin or mesovorticity) as the internal thermodynamic parameter becomes necessary for
adequate description of tornado (and intensive atmospheric vortices, in general) dynamics. The continuum description is
formulated with standard introducing of stresses averaged over a cross-section, and now motivated asymmetry leads to
the vortices moment of momentum balance. The set of nonlinear 3D partial differential equations is suggested for the
problem of tornado generation from a cloud of initial vortices. The dependence of turbulent rotation viscosity on the spin
permits to localize the tornado body due to the nonlinear diffusion effect. Numerical calculations are performed at two
different clusters using Parjava program environment. The growth of typical tornado structure is shown by a sequence of
pictures. A visual comparison with the Hurricane Isabel, 2003, is represented.

Global Journal of Energy Technology Research Updates, 2014

In this paper, we analyze characteristics of a small Combined Heat and Power (CHP) system based m... more In this paper, we analyze characteristics of a small Combined Heat and Power (CHP) system based mainly on Organic Rankine Cycle (ORC) and heating plant in actual series connection regarding the low-temperature heat carrier heated by purely solar flat collector field. Simultaneously and for specific power production, comparison of this layout with stand-alone ORC, and with the traditional ORC-CHP imposing gain of condenser heat for heating aims, in second step, has been conducted. For evaluation, energetic and design criteria have been determined opposite the heating effects and also temperatures of the heat source and sink. The simulations addressed interesting optimization ratios till 24 % for the power unit throughout this series CHP utility versus single power generation at the same conditions tested. Moreover, the high heat source temperatures and CHP ratios improve the performance of the overall series plant, while the high supply and return temperatures have negative effects. Finally, the ORC-CHP scheme handled here highlights distinctive exploitation aspects and more suitability in wide range of application in comparison to yielding the hightemperature condensation heat of ORC, especially at low ambient temperatures, high supply and heat source temperatures. So, it can be advised to be adopted instead of the two other strategies.

Journal of Advanced Thermal Science Research, 2019

Computational analysis of radiative heat and mass transfer of nanofluid over a slendering stretch... more Computational analysis of radiative heat and mass transfer of nanofluid over a slendering stretching sheet in porous medium with uneven heat source and slip effects have been carried out in this article. The transformed equations a of the flow model are solved by the Runge-Kutta scheme coupled with shooting method to depict the dimensionless velocity, temperature, and concentration at the boundary layer. Numerical computations are carried out and discussed for skin friction coefficient and local Nusselt number. We found an excellent agreement of the present results with the existed results under some special conditions. It is also found that the heat transfer performance is high in the presence of velocity slip effect. Dimensionless skin-friction coefficient has decreased for increasing magnetic field, power lawindex with velocity slip and wall thickness.

Journal of Chemical Engineering Research Updates, 2020

Xylitol, a natural crystalline polyol, presents a cooling effect due to its negative heat of solu... more Xylitol, a natural crystalline polyol, presents a cooling effect due to its negative heat of solution at 35 °C
supported by humidity absorption, contributing to a fresh sensation when it dissolves. Since this material is sometimes in
a liquid state, it cannot be incorporated in or onto a substrate without being protected. One of the strategies to protect the
active substance may be forming a barrier layer at its surface, i.e., microencapsulation. The present work is devoted to
studying the effect of continuous phase parameters affecting on encapsulation of xylitol with a poly (urea-urethane) shell
through a two-step microencapsulation process. The first step is liquid-liquid dispersion either in toluene or Miglyol 812N,
and the second step is microencapsulation by interfacial polymerization. The process can be used to control the size
distribution of the microparticles, the thickness, and the chemical nature of the shell, which influences the release rate of
the active substance. The choice of the continuous phase solvent (toluene or Miglyol 812N) required some changes in
the formulation of the system, especially the HLB of the surfactant mixture, to obtain a stable emulsion with a narrow
particle size distribution. The thermo-chemical and morphological characteristics of microparticles were studied by
Fourier transform-infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), enthalpy of dilution, and
scanning electron microscope (SEM). The microparticle size is governed by the emulsion step and the chemical
composition of the organic phase. Most of the thermal properties are related to their porous structure and their chemical
shell formation during the interfacial polymerization step.

The Global Environmental Engineers, 2021

This review is aimed to increase knowledge on computational CO2 capture and storage models that a... more This review is aimed to increase knowledge on computational CO2 capture and storage models that are gradually evolving in the design and development to act as more effective carbon capture agents with acceptable toxicity and costs and complementary adjuncts to experiments for comprehending amino-CO2 reaction mechanisms. Also, the review discussed experimental research of degradation reactions of aqueous organic amines, measurements, kinetics and forecasts of amine pKₐ values and amine-CO2 equilibria. Also, the researcher comprehensively discussed the computational simulation of mechanisms of carbon capture reactions. In the contexts of experimental and computational studies, the comparative advantages of bicarbonate, carbamic acid,

The Global Environmental Engineers, 2021

The energy crisis and environmental impact are the major concern mf the present world. Three-whee... more The energy crisis and environmental impact are the major concern mf the present world. Three-wheeler auto-rickshaw becoming an important passenger transport vehicle in a developing country which are indirectly powered by the grid electricity through the batteries. Such vehicle consumes significant grid energy during charging

The Global Environmental Engineers, 2021

Waste and sanitation Management is a major challenge in urban areas in Uganda where waste is comp... more Waste and sanitation Management is a major challenge in urban areas in Uganda where waste is composed of atleast 70% organic content and is basically collected and disposed of in landfills. While 90% of the sanitation facilities used are onsite systems often requiring additional treatment of sewage and faecal matter sewage yet faecal and

The Global Environmental Engineers, 2021

The world is currently facing the water crisis brought about by the deterioration in its quality... more The world is currently facing the water crisis brought about by the deterioration in its
quality and the difficult access to its resources due to ever-growing demand in largescale consumer sectors such as agriculture, industry and tourism. Consequently,
increasing pressure on water resources is experienced in the world as the outcome of
the strong population growth, continued urbanization and rapid industrialization,
together with numerous discharges of polluted waters into watercourses. Strategies
have been developed throughout the world for improving both the quality and access to
water in a sufficient quantity. Thus, different technologies, both established and
emerging ones, are presently utilized in view to treat wastewaters, including those of the
mining origin. The present work reviews the different uses of water in the mining
industry and identifies different sources of polluted waters. It analyses wastewater
treatment techniques in view of their application specifically to the treatment of
wastewaters from the DR Congo mining industry. As such, this work identifies itself as
part of an effort to contribute to the improvement of wastewater management practices
in the DR Congo mining industry as well as improved access and sustainable use of
water resources.

The Global Environmental Engineers, 2021

The present study was undertaken for assessment of spatial characteristics of road traffic noise ... more The present study was undertaken for assessment of spatial characteristics of road traffic noise at varying intervals viz early morning (8-9 am), late morning (11-12 pm), afternoon (2-3 pm) and evening (6-7 pm) time at ten important locations (near school building) of G. T. Road which is passing through the Burdwan town. A digital noise meter was used for recording the traffic noise and a noise contour map was constructed by using Geographical Information System (GIS). The recorded data revealed that the highest and lowest average noises were 67.1 dB (A) and 86.9 dB (A), respectively. The results revealed that the performance of the CRTN model in both afternoon and evening time for predicting noise level near school buildings with a coefficient of determination (R2) are 0.536 and 0.544 and a mean difference of-1.19 dB (A) and-0.48 dB (A) between the measured and predicted values respectively. Similarly, Pearson statistics also revealed the strong correlation between measured and predicted noise level at afternoon (r = 0.732, p < 0.016) and evening time (r = 0.744, p < 0.014). However, the predicted traffic noise during early morning and late morning hours are less than 0.5. These low values are due to irregular traffic speed, traffic density and irregular building height are the appropriate reasons for low accuracy in predicting the model. Finally, it may be suggested that CRTN model can be a decision tool for predicting equivalent noise levels in a city like Burdwan.

The Global Environmental Engineers, 2020

Used Motor Oils Recycling (UMOR) can be fulfilled in different ways depending on the quality and ... more Used Motor Oils Recycling (UMOR) can be fulfilled in different ways depending on the quality and quantity of
the fresh oil and the quality of the collected UMO. The Acidic Sludge (AS) is a byproduct of UMOR with hazardous
effects and impacts on the environment. It yields 0.15 of each barrel (220 liters) of UMOR operation. The valid and
relevant databases were used to discover the latest reports in managing the AS of UMOR operation. The findings of the
current review were oriented towards the physical-chemical backbone of AS and its industrial exploitation. The chemical
structure of AS was highlighted by a glance view in the recent reports. To sum up, it was recommended to utilize this
valuable byproduct in many industrial applications as an additive

The Global Environmental Engineers, 2020

Urban agriculture has become a common practice in major urban agglomerations, particularly in the... more Urban agriculture has become a common practice in major urban agglomerations, particularly in the mining region of Katanga, in the Democratic Republic of Congo (DRC). However, this agriculture is based on the production of vegetables grown on the soil contaminated by industrial water and domestic wastewater, wherein one finds heavy metals and pathogenic microbes capable of endangering the consumer's health. This work has been carried out in view of contributing to the consumer's health protection and endeavours at establishing, based on physicochemical and mineral analyses of water samples, the soil used in the urban agriculture and edible plants, a link between the use of contaminated waters in the urban agriculture, the build-up of heavy metals in the soil and the possible contamination by heavy metals of vegetables grown (amaranths and broccolis) in the Kasungami district and consumed by the population living in the City of Lubumbashi (DRC). The results given by the analyses of water, soils and vegetable samples revealed that, apart from cobalt, other heavy metals were present in water used in the urban agriculture to concentrations below quality standards. As for the soil, it contained heavy metals to concentration reputed phytotoxic. However, only the broccolis were contaminated with lead, contrarily to amaranths in which heavy metals were present to concentrations below quality standards. These findings enabled concluding that urban agriculture of vegetables encountered in the large agglomerations of the DRC could endanger the consumers' health and measures need to be taken in view of preventing heavy metal from entering the food chain.

The Global Environmental Engineers, 2020

Coastal areas are subjected to unwelcome circumstances in the shape of sea-level rise and its ad... more Coastal areas are subjected to unwelcome circumstances in the shape of sea-level rise and its adverse
outcomes like storm surge, flooding and erosion with continuous climate change. In this manuscript, the authors
presented the two case studies of erosion, displacement pattern and resettlement examples of climate displaced people
of Bangladesh and India. Climate displaced people of Bangladesh and India have been an influx from coastal areas to a
disaster-free safe area and also urban slum areas. In these circumstances, displaced people didn’t enjoy their cultural
harmony, social status, family bondage in new living places. Resettled climate displaced people in the new habitat of
Bangladesh and India are trying to adopting their new living conditions. Facilities of rehabilitation facilities have been
evaluated to be insufficient and tiny for their sustenance in the long run. An appropriate development strategy is required
by the Government so as to avoid the socio-economic backwardness of the resettlement areas of the South-Eastern
coast of Bangladesh and Indian Sundarban inhabitants. The island inhabitants wait with great anxiety for help from the
Government and Non-Government authorities to come frontward and support them to pull through their losses.

The Global Environmental Engineers, 2020

Global temperature increases and precipitation changes are both expected to alter alpine ecosyste... more Global temperature increases and precipitation changes are both expected to alter alpine ecosystem structure and processes. In this paper, we reviewed the recent climate changes observed and the global change researches on the Tibetan Plateau. Firstly, we found that the mean annual temperature and precipitation (data from 75 meteorological stations, where all daily precipitation data are available) have increased since 1971, there were 0.5˚C and 0.7˚C per decade increase in annual and winter temperature, respectively, on Tibetan Plateau, and changes in precipitation were found both less spatially and temporally consistent. Secondly, we reviewed the climate change researches on the Tibetan Plateau published between 2000 and 2019 mainly focused on plant growth and ecosystem carbon balance which including plant phenology, plant productivity, plant diversity, exchanges in ecosystem carbon and soil organic carbon. Findings and insights from these studies have been very useful to understand how the alpine ecosystem processes respond to climate change. However, the effects of temperature increase on plant growth and ecosystem carbon balance are differ depending on the study sites and warming methods and periods, and the effects of precipitation changes are sparse.

The Global Environmental Engineer, 2020

Pure LaCoO3 and LaMnO3 were synthesized under different ion concentrations of precursors and the ... more Pure LaCoO3 and LaMnO3 were synthesized under different ion concentrations of precursors and the difference of active sites for CH4 oxidation between them was found. As the ion concentration of precursors increased, the two kind of perovskite crystals grew larger along with agglomerate. Meanwhile, LaCoO3 and LaMnO3 prepared by high ion concentrations of precursors enriched more surface Co 3+ or Mn 4+. The catalytic activity of the catalysts was tested in the oxidation reaction of methane under fuel-lean condition, results showed that LC-1.0 and LM-2.0 had the optimal activity and the light-off temperatures were 492°C and 486°C, respectively. Combining the physical and chemical characterization, the LaCoO3 and LaMnO3 possess different active sites for the methane catalytic reaction, and the conclusion was further verified by the DFT simulation. For LaCoO3, the surface lattice oxygen is the main active site, while for LaMnO3, the reaction is facilitated by the high-valent manganese.

Global Journal of Earth Science and Engineering, 2014

In this paper, a regional model to assess groundwater resources of the shallow groundwater system... more In this paper, a regional model to assess groundwater resources of the shallow groundwater system of
Beauvais in the North of France has been satisfactorily completed using geophysical surveys and numerical modeling
using MODFLOW-2000. A three-dimensional flow model has been developed for this aquifer using a large amount of
available geological and hydrological data. The numerical flow model was calibrated and validated with datasets during
1998–2010. The calibration was done both by the automated parameter PEST and by the trial and error process. The
main objective is to quantify the components of the groundwater mass balance, to estimate the hydraulic conductivity
distribution and to characterize the hydrologic system. Furthermore, MODFLOW model was used to estimate the
recharge, discharge, base flow and water Table fluctuation. Numerical simulations indicate that the Canada lake, located
in the Thérain valley, acts as a most discharge area for regional groundwater flow. Groundwater inflow from the recharge
from Beauvais plateau which is mainly due to precipitation supplies the aquifer with most of its water. Following the
calibration process, a sensitivity analysis was carried out. The results show that the aquifer exhibits the highest
sensibility to the recharge parameters changes and hydraulic conductivity. The impact of the changes for both these
hydraulic parameters appears to differ from large decrease to large increase in total groundwater discharge. The delicate
shifts in the groundwater systems, which cause the changes in the recharge and discharge, clearly show the need for
hydrological modeling.

Global Journal of Earth Science and Engineering, 2014

Earthquakes are the most destructive natural disaster causing lot of casualties, injuries and eco... more Earthquakes are the most destructive natural disaster causing lot of casualties, injuries and economic losses leaving behind a trail of panic. Earthquake risk assessment is needed for disaster mitigation, disaster management, and emergency preparedness. Vulnerability of building is one of the major factors contributing to earthquake risk. The vulnerability functions framed for a particular building is input parameter for loss estimation. Procedure for developing fragility curves of specific building type is discussed. Seismic fragility curves were developed and damage probability threshold has been constructed for the chosen problems.

Global Journal of Earth Science and Engineering, 2014

The Glauconitic sandstone is well exposed in the Newari area of Sonbhadra district of Uttar Prade... more The Glauconitic sandstone is well exposed in the Newari area of Sonbhadra district of Uttar Pradesh, India. Conjugate pairs of kink bands are confined within the laminated sandstone and are present half km west of Newari near the confluence of a tributary with the Son river. The conjugate kink bands are plunging at 13 0 and 36 0 in SE (S58 0 E) and NE (N56 0 E). This shows that ephemeral compressional stress regime was responsible for the development of conjugate set of kink bands. The stress axis would have been oriented from NE-SW direction. A major fault F1 passes through the glauconitic sandstone in the west of the Newari village. This fault is a reverse fault and strikes at N25ºW-S25ºE. Another fault F2 oblique to F1 passes in the direction N70ºE-S70ºW. In view of the fact that the kink bands are confined within the laminated sandstone, it is inferred that they have been formed as a result of penecontemporaneous deformation and suggest seismic activities that might have occurred around 1080±40 Ma ago as a result of activation of the faults present in the Newari area of the Sonbhadra district, Uttar Pradesh, India those may be companion faults of the Son-Narmada Fault system.

Global Journal of Earth Science and Engineering, 2014

Texture (grain size) is one of the many parameters, which is used in determining depositional env... more Texture (grain size) is one of the many parameters, which is used in determining depositional environments of sediments and sedimentary rocks. In the present investigation, texture was analysed from sixteen stations in the Khurar River, Madhya Pradesh, India. Here, grain size analysis was carried out employing mechanical sieving method using a sonic shaker. Frequency and cumulative frequency curves were prepared from the grain size data on centimetre and arithmetic probability papers, respectively. The phi values were determined and used to calculate the statistical parameters such as mean, standard deviation, skewness and kurtosis. It is found that the mean size value varies from-0.63to 0.80 with a graphic mean distribution ranging from-0.27 to 0.40 , indicating that the size of the river sand is very coarse to coarse-grained. The standard deviation (sorting) shows a range of 0 .69 to 1.65. The skewness values of the sediment samples range from 0.19 to 0.29 , thus, indicating the presence of fine fraction to near-symmetrical fraction in the population. The kurtosis varies between 1.03 and 1.09 , indicating that 25% of the samples are leptokurtic, 6.25% are very leptokurtic, 50% are mesokurtic and 12.5% are platykurtic. The platykurtic nature in few cases suggests mixing of sediments from two sources. Bivariate plots prepared combining various textural parameters were used to interpret their behaviour in the river sediments. CM plot was also prepared to understand the dominant mode of sediments transportation in the Khurar River. In this river, all the sediments are dominantly characterized by the rolling process of transportation. This study reveals that sorting varies from poorly sorted to moderately well sorted in the course of the river may be because of dominance of winnowing and selective sorting in the lower reaches of the river.

Global Journal of Earth Science and Engineering, 2014

A genetic type of Cenozoic gold mineralization related to mud volcanoes is suggested to be recogn... more A genetic type of Cenozoic gold mineralization related to mud volcanoes is suggested to be recognized in the Lena area. This type of mineralization has never before been distinguished in the area and is genetically related to the development of depression mud-volcano structures on the northern continuation of the Baikal rift. Geologicalgeophysical data and results of lithological-petrographic and mineralogical studies of the mud-volcano lithological complex, naturally occurring microscorias, and ore minerals from the loose Quaternary rocks, as well as and comparison of the chemical composition of the latter with analogous minerals from the Sukhoi Log and Pervenets gold deposits, prove genetic links of economic placer deposits in the Lena area with mud volcanoes.

Global Journal of Earth Science and Engineering, 2014

An alternative to solve the problem of disposing dredged marine sediments (DMS) in open sea, whic... more An alternative to solve the problem of disposing dredged marine sediments (DMS) in open sea, which could lead to undesirable contamination and destruction of the marine ecosystem, is to reuse the material in reclamation works. For such applications, it is important to determine the time required for strength gain of the relocated DMS. A labbased study was conducted to simulate and examine the post-consolidation hardening of DMS when placed as a backfill with relation to time. A separate series of tests were also carried out on the DMS being lightly solidified with cement, with the purpose of identifying potential shortening of the waiting period. The DMS sample was prepared at different water contents based on the soil's liquid limit (LL = 54.5 %), i.e. 0.90, 1.25 and 1.81LL. The undrained shear strength was measured using the laboratory vane shear (VS) test. Complementary fall cone (FC) tests were conducted for additional information on the improved remoulded strength and stiffness of the DMS. The results showed that the strength and stiffness (cone penetration resistance) of the relocated DMS could effectively improve with time, though the rest period required is shorter for a sample with lower initial water content. On the other and, light cementation shortened the rest period, and significantly improved the strength and stiffness at dosages as low as 5 % (as per dry weight of the soil). Overall the study gave an overview of the reusability of DMS as a backfill material in reclamation works, whether with or without lightly induced solidification, depending mainly on the limitations of rest period available.

Global Journal of Earth Science and Engineering, 2014

Authors are returning to the basic concepts of turbulence – homogeneity and symmetry principles. ... more Authors are returning to the basic concepts of turbulence – homogeneity and symmetry principles. It is shown
that the homogeneity in the sense of constant mean velocity gradient (instead of constant velocity) permits to introduce
mirror asymmetry. This way is corresponding to stratified atmosphere and to differential volume in any continuum model.
The basic ideas of A. N. Kolmogorov do not contradict to such an approach. Moreover, the use of the intrinsic eddy
angular velocity (so-called spin or mesovorticity) as the internal thermodynamic parameter becomes necessary for
adequate description of tornado (and intensive atmospheric vortices, in general) dynamics. The continuum description is
formulated with standard introducing of stresses averaged over a cross-section, and now motivated asymmetry leads to
the vortices moment of momentum balance. The set of nonlinear 3D partial differential equations is suggested for the
problem of tornado generation from a cloud of initial vortices. The dependence of turbulent rotation viscosity on the spin
permits to localize the tornado body due to the nonlinear diffusion effect. Numerical calculations are performed at two
different clusters using Parjava program environment. The growth of typical tornado structure is shown by a sequence of
pictures. A visual comparison with the Hurricane Isabel, 2003, is represented.

Global Journal of Energy Technology Research Updates, 2014

In this paper, we analyze characteristics of a small Combined Heat and Power (CHP) system based m... more In this paper, we analyze characteristics of a small Combined Heat and Power (CHP) system based mainly on Organic Rankine Cycle (ORC) and heating plant in actual series connection regarding the low-temperature heat carrier heated by purely solar flat collector field. Simultaneously and for specific power production, comparison of this layout with stand-alone ORC, and with the traditional ORC-CHP imposing gain of condenser heat for heating aims, in second step, has been conducted. For evaluation, energetic and design criteria have been determined opposite the heating effects and also temperatures of the heat source and sink. The simulations addressed interesting optimization ratios till 24 % for the power unit throughout this series CHP utility versus single power generation at the same conditions tested. Moreover, the high heat source temperatures and CHP ratios improve the performance of the overall series plant, while the high supply and return temperatures have negative effects. Finally, the ORC-CHP scheme handled here highlights distinctive exploitation aspects and more suitability in wide range of application in comparison to yielding the hightemperature condensation heat of ORC, especially at low ambient temperatures, high supply and heat source temperatures. So, it can be advised to be adopted instead of the two other strategies.

Journal of Advanced Thermal Science Research, 2019

Computational analysis of radiative heat and mass transfer of nanofluid over a slendering stretch... more Computational analysis of radiative heat and mass transfer of nanofluid over a slendering stretching sheet in porous medium with uneven heat source and slip effects have been carried out in this article. The transformed equations a of the flow model are solved by the Runge-Kutta scheme coupled with shooting method to depict the dimensionless velocity, temperature, and concentration at the boundary layer. Numerical computations are carried out and discussed for skin friction coefficient and local Nusselt number. We found an excellent agreement of the present results with the existed results under some special conditions. It is also found that the heat transfer performance is high in the presence of velocity slip effect. Dimensionless skin-friction coefficient has decreased for increasing magnetic field, power lawindex with velocity slip and wall thickness.

Journal of Chemical Engineering Research Updates, 2020

Xylitol, a natural crystalline polyol, presents a cooling effect due to its negative heat of solu... more Xylitol, a natural crystalline polyol, presents a cooling effect due to its negative heat of solution at 35 °C
supported by humidity absorption, contributing to a fresh sensation when it dissolves. Since this material is sometimes in
a liquid state, it cannot be incorporated in or onto a substrate without being protected. One of the strategies to protect the
active substance may be forming a barrier layer at its surface, i.e., microencapsulation. The present work is devoted to
studying the effect of continuous phase parameters affecting on encapsulation of xylitol with a poly (urea-urethane) shell
through a two-step microencapsulation process. The first step is liquid-liquid dispersion either in toluene or Miglyol 812N,
and the second step is microencapsulation by interfacial polymerization. The process can be used to control the size
distribution of the microparticles, the thickness, and the chemical nature of the shell, which influences the release rate of
the active substance. The choice of the continuous phase solvent (toluene or Miglyol 812N) required some changes in
the formulation of the system, especially the HLB of the surfactant mixture, to obtain a stable emulsion with a narrow
particle size distribution. The thermo-chemical and morphological characteristics of microparticles were studied by
Fourier transform-infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), enthalpy of dilution, and
scanning electron microscope (SEM). The microparticle size is governed by the emulsion step and the chemical
composition of the organic phase. Most of the thermal properties are related to their porous structure and their chemical
shell formation during the interfacial polymerization step.

The Global Environmental Engineers, 2021

This review is aimed to increase knowledge on computational CO2 capture and storage models that a... more This review is aimed to increase knowledge on computational CO2 capture and storage models that are gradually evolving in the design and development to act as more effective carbon capture agents with acceptable toxicity and costs and complementary adjuncts to experiments for comprehending amino-CO2 reaction mechanisms. Also, the review discussed experimental research of degradation reactions of aqueous organic amines, measurements, kinetics and forecasts of amine pKₐ values and amine-CO2 equilibria. Also, the researcher comprehensively discussed the computational simulation of mechanisms of carbon capture reactions. In the contexts of experimental and computational studies, the comparative advantages of bicarbonate, carbamic acid,

The Global Environmental Engineers, 2021

The energy crisis and environmental impact are the major concern mf the present world. Three-whee... more The energy crisis and environmental impact are the major concern mf the present world. Three-wheeler auto-rickshaw becoming an important passenger transport vehicle in a developing country which are indirectly powered by the grid electricity through the batteries. Such vehicle consumes significant grid energy during charging

The Global Environmental Engineers, 2021

Waste and sanitation Management is a major challenge in urban areas in Uganda where waste is comp... more Waste and sanitation Management is a major challenge in urban areas in Uganda where waste is composed of atleast 70% organic content and is basically collected and disposed of in landfills. While 90% of the sanitation facilities used are onsite systems often requiring additional treatment of sewage and faecal matter sewage yet faecal and

The Global Environmental Engineers, 2021

The world is currently facing the water crisis brought about by the deterioration in its quality... more The world is currently facing the water crisis brought about by the deterioration in its
quality and the difficult access to its resources due to ever-growing demand in largescale consumer sectors such as agriculture, industry and tourism. Consequently,
increasing pressure on water resources is experienced in the world as the outcome of
the strong population growth, continued urbanization and rapid industrialization,
together with numerous discharges of polluted waters into watercourses. Strategies
have been developed throughout the world for improving both the quality and access to
water in a sufficient quantity. Thus, different technologies, both established and
emerging ones, are presently utilized in view to treat wastewaters, including those of the
mining origin. The present work reviews the different uses of water in the mining
industry and identifies different sources of polluted waters. It analyses wastewater
treatment techniques in view of their application specifically to the treatment of
wastewaters from the DR Congo mining industry. As such, this work identifies itself as
part of an effort to contribute to the improvement of wastewater management practices
in the DR Congo mining industry as well as improved access and sustainable use of
water resources.

The Global Environmental Engineers, 2021

The present study was undertaken for assessment of spatial characteristics of road traffic noise ... more The present study was undertaken for assessment of spatial characteristics of road traffic noise at varying intervals viz early morning (8-9 am), late morning (11-12 pm), afternoon (2-3 pm) and evening (6-7 pm) time at ten important locations (near school building) of G. T. Road which is passing through the Burdwan town. A digital noise meter was used for recording the traffic noise and a noise contour map was constructed by using Geographical Information System (GIS). The recorded data revealed that the highest and lowest average noises were 67.1 dB (A) and 86.9 dB (A), respectively. The results revealed that the performance of the CRTN model in both afternoon and evening time for predicting noise level near school buildings with a coefficient of determination (R2) are 0.536 and 0.544 and a mean difference of-1.19 dB (A) and-0.48 dB (A) between the measured and predicted values respectively. Similarly, Pearson statistics also revealed the strong correlation between measured and predicted noise level at afternoon (r = 0.732, p < 0.016) and evening time (r = 0.744, p < 0.014). However, the predicted traffic noise during early morning and late morning hours are less than 0.5. These low values are due to irregular traffic speed, traffic density and irregular building height are the appropriate reasons for low accuracy in predicting the model. Finally, it may be suggested that CRTN model can be a decision tool for predicting equivalent noise levels in a city like Burdwan.

The Global Environmental Engineers, 2020

Used Motor Oils Recycling (UMOR) can be fulfilled in different ways depending on the quality and ... more Used Motor Oils Recycling (UMOR) can be fulfilled in different ways depending on the quality and quantity of
the fresh oil and the quality of the collected UMO. The Acidic Sludge (AS) is a byproduct of UMOR with hazardous
effects and impacts on the environment. It yields 0.15 of each barrel (220 liters) of UMOR operation. The valid and
relevant databases were used to discover the latest reports in managing the AS of UMOR operation. The findings of the
current review were oriented towards the physical-chemical backbone of AS and its industrial exploitation. The chemical
structure of AS was highlighted by a glance view in the recent reports. To sum up, it was recommended to utilize this
valuable byproduct in many industrial applications as an additive

The Global Environmental Engineers, 2020

Urban agriculture has become a common practice in major urban agglomerations, particularly in the... more Urban agriculture has become a common practice in major urban agglomerations, particularly in the mining region of Katanga, in the Democratic Republic of Congo (DRC). However, this agriculture is based on the production of vegetables grown on the soil contaminated by industrial water and domestic wastewater, wherein one finds heavy metals and pathogenic microbes capable of endangering the consumer's health. This work has been carried out in view of contributing to the consumer's health protection and endeavours at establishing, based on physicochemical and mineral analyses of water samples, the soil used in the urban agriculture and edible plants, a link between the use of contaminated waters in the urban agriculture, the build-up of heavy metals in the soil and the possible contamination by heavy metals of vegetables grown (amaranths and broccolis) in the Kasungami district and consumed by the population living in the City of Lubumbashi (DRC). The results given by the analyses of water, soils and vegetable samples revealed that, apart from cobalt, other heavy metals were present in water used in the urban agriculture to concentrations below quality standards. As for the soil, it contained heavy metals to concentration reputed phytotoxic. However, only the broccolis were contaminated with lead, contrarily to amaranths in which heavy metals were present to concentrations below quality standards. These findings enabled concluding that urban agriculture of vegetables encountered in the large agglomerations of the DRC could endanger the consumers' health and measures need to be taken in view of preventing heavy metal from entering the food chain.

The Global Environmental Engineers, 2020

Coastal areas are subjected to unwelcome circumstances in the shape of sea-level rise and its ad... more Coastal areas are subjected to unwelcome circumstances in the shape of sea-level rise and its adverse
outcomes like storm surge, flooding and erosion with continuous climate change. In this manuscript, the authors
presented the two case studies of erosion, displacement pattern and resettlement examples of climate displaced people
of Bangladesh and India. Climate displaced people of Bangladesh and India have been an influx from coastal areas to a
disaster-free safe area and also urban slum areas. In these circumstances, displaced people didn’t enjoy their cultural
harmony, social status, family bondage in new living places. Resettled climate displaced people in the new habitat of
Bangladesh and India are trying to adopting their new living conditions. Facilities of rehabilitation facilities have been
evaluated to be insufficient and tiny for their sustenance in the long run. An appropriate development strategy is required
by the Government so as to avoid the socio-economic backwardness of the resettlement areas of the South-Eastern
coast of Bangladesh and Indian Sundarban inhabitants. The island inhabitants wait with great anxiety for help from the
Government and Non-Government authorities to come frontward and support them to pull through their losses.

The Global Environmental Engineers, 2020

Global temperature increases and precipitation changes are both expected to alter alpine ecosyste... more Global temperature increases and precipitation changes are both expected to alter alpine ecosystem structure and processes. In this paper, we reviewed the recent climate changes observed and the global change researches on the Tibetan Plateau. Firstly, we found that the mean annual temperature and precipitation (data from 75 meteorological stations, where all daily precipitation data are available) have increased since 1971, there were 0.5˚C and 0.7˚C per decade increase in annual and winter temperature, respectively, on Tibetan Plateau, and changes in precipitation were found both less spatially and temporally consistent. Secondly, we reviewed the climate change researches on the Tibetan Plateau published between 2000 and 2019 mainly focused on plant growth and ecosystem carbon balance which including plant phenology, plant productivity, plant diversity, exchanges in ecosystem carbon and soil organic carbon. Findings and insights from these studies have been very useful to understand how the alpine ecosystem processes respond to climate change. However, the effects of temperature increase on plant growth and ecosystem carbon balance are differ depending on the study sites and warming methods and periods, and the effects of precipitation changes are sparse.

The Global Environmental Engineer, 2020

Pure LaCoO3 and LaMnO3 were synthesized under different ion concentrations of precursors and the ... more Pure LaCoO3 and LaMnO3 were synthesized under different ion concentrations of precursors and the difference of active sites for CH4 oxidation between them was found. As the ion concentration of precursors increased, the two kind of perovskite crystals grew larger along with agglomerate. Meanwhile, LaCoO3 and LaMnO3 prepared by high ion concentrations of precursors enriched more surface Co 3+ or Mn 4+. The catalytic activity of the catalysts was tested in the oxidation reaction of methane under fuel-lean condition, results showed that LC-1.0 and LM-2.0 had the optimal activity and the light-off temperatures were 492°C and 486°C, respectively. Combining the physical and chemical characterization, the LaCoO3 and LaMnO3 possess different active sites for the methane catalytic reaction, and the conclusion was further verified by the DFT simulation. For LaCoO3, the surface lattice oxygen is the main active site, while for LaMnO3, the reaction is facilitated by the high-valent manganese.