Pardeep Sharma - Academia.edu (original) (raw)

Papers by Pardeep Sharma

Lecture Notes in Mechanical Engineering

The aim of this work is to evaluate the performance of portable thermoelectric refrigerator for v... more The aim of this work is to evaluate the performance of portable thermoelectric refrigerator for vehicles (cars, trucks and buses). Thermoelectric refrigerator is based on the principle of a Peltier effect. TES-12704 thermoelectric module has been used in fabrication and tested. The cooling temperature of fin attached with thermoelectric module inside the refrigerator is measured and compared in natural and forced mode. The thermoelectric refrigerator is advantageous to keep perishable items at low temperature during travelling of the people. The results show that forced mode of producing cooling effect inside the thermoelectric refrigerator gave better performance as compared to natural mode-based thermoelectric refrigerator.

Materials Today: Proceedings, 2020

Abstract Aluminium metal matrix composite of AA2014 reinforced with 10 wt% of Al2O3 reinforcement... more Abstract Aluminium metal matrix composite of AA2014 reinforced with 10 wt% of Al2O3 reinforcement was manufactured by liquid casting mode. Wear was estimated on specimens prepared according to ASTM G99-95a standard at room temperature. Pin on disc apparatus was used to evaluate the wear of specimens. Wear rate enlarged with a raise in the load and sliding distance; whereas reduced with raise in sliding speed. The material removal mechanism was found due to abrasive wear.

i-manager's Journal on Material Science, 2015

Table S1. List of Salmonella serovars tested for the specificity of wild type Salmonella Typhimur... more Table S1. List of Salmonella serovars tested for the specificity of wild type Salmonella Typhimurium PCR. (DOCX 15 kb)

FPGAs are increasingly being used in the high performance and scientific computing community to i... more FPGAs are increasingly being used in the high performance and scientific computing community to implement floating-point based hardware accelerators. We present FPGA floating-point multiplication. Such circuits can be extremely useful in the FPGA implementation of complex systems that benefit from the reprogramability and parallelism of the FPGA device but also require a general purpose multiplier unit. While previous work has considered circuits for low precision floatingpoint formats, we consider the implementation of 32-bit Single precision circuits that also provide rounding and exception handling. We introduce an algorithm for multiplication and analyze its performance on Virtex2P hardware module at speed grade -7.

Journal of entomology and zoology studies, 2019

The aim of the present study was to survey the impact of different doses of paracetamol on micron... more The aim of the present study was to survey the impact of different doses of paracetamol on micronucleus frequency and other morphological deformities of erythrocytes of fish Cyprinus carpio. A total of 18 fish were divided in to three groups. Group A served as control while group B and C were given treatment with 5mg/l and 10 mg/l of paracetamol. Behaviour of the exposed fish was observed. Increase in pigmentation, high breathing rate, surface gulfing was observed in treatment groups. Blood samples were taken the from caudal vein after 7 and 14 days of exposure. Micronucleated cells, Binucleated cells, fragmented DNA, lobed nucleus, notched nucleus were scored under nuclear deformities and cytoplasmic vacuole and karyolysis were considered as cytoplasmic deformities. A significant increase in values of all the nuclear and cytoplasmic deformities have been observed in dose as well as time dependent manner except for karyolysis cells. Highest effect was observed at the highest concent...

A study was conducted to determine and compare the efficacy of fenbendazole and oxyclozanide-tetr... more A study was conducted to determine and compare the efficacy of fenbendazole and oxyclozanide-tetramisole combination against gastrointestinal nematodes in naturally infected Gaddi goats. On treatment, both the groups i.e. fenbendazole at 7.5 mg / kg bo dy weight and oxyclozanide-tetramisole combination at 1 ml / 3 kg body weight showed a significant reduction in egg counts on day 7 and da y 14 post treatment (DPT). However, group treated with fenbendazole showed more efficacy even on day 21 post treatment when compared to the other group.

Veterinary Research Communications, 2021

An outbreak of sheeppox was investigated in a cluster of villages situated in Western Himalayan r... more An outbreak of sheeppox was investigated in a cluster of villages situated in Western Himalayan ranges of a Northern Indian state. Non-migratory sheep ( n = 80) of native breeds namely Gaddi and Rampur Bushair were infected and 15 have died. The outbreak started after a few animals contracted the disease during the summer grazing period at the highland pastures from migrating flocks of sheep. This initial outbreak resulted in a further spreading of the disease into the valley. Clinical examination revealed varying degree of cutaneous papular lesions and respiratory distress. Upon necropsy, visceral lesions in the lungs, trachea and kidneys were also found. Clinical and morbid samples were found positive for sheeppox virus using group specific P32 gene and I3L gene based multiplex PCR differentiating sheeppox and goatpox viruses. Histopathological, hematological and blood biochemical analysis also supported the pathology of an acute viral infection. The causative sheeppox virus strain was isolated using lamb testicular cell culture and phylogenetic analysis, based upon P32 and RPO30 genes, showed its clustering with other Indian strains reported from neighboring states. This study demonstrated the spread of sheeppox virus to new niches by migratory sheep flocks leading to establishment of endemic infections in many new pockets of higher Western Himalayas.

Journal of the Mechanical Behavior of Materials, 2018

The current research work focuses on the mechanical and tribological behavior of an NiTi shape me... more The current research work focuses on the mechanical and tribological behavior of an NiTi shape memory alloy (SMA) processed with the help of powder metallurgy. SMAs have found applications in the medical, space and aerospace industries with usage in the manufacturing of microelectromechanicals (MEMS) and as actuators in the electronic industry. The wear behavior of a material greatly affects its performance. The wear behavior of an SMA can be determined with the help of the dry abrasion test. The increase in binder content and rotational speed at a constant load increases the wear rate of SMA alloys. The coefficient of friction decreases with the usage of alloys. A decrease in density has been found, as well as porosity, with the increasing content of binder in the alloy. Density decreases from 6.7 to 5.1 g/cm3 while porosity decreases from 57 to 23% with increased binder content. Scanning electron microscopy (SEM) and X-ray diffraction has been used for the investigation of surface...

International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 2020

Background: Continuous electronic fetal monitoring in labour has become a standard practice in de... more Background: Continuous electronic fetal monitoring in labour has become a standard practice in developed countries; this may not be possible in low middle-income countries. So, this study was conducted to correlate admission non stress test (NST) and immediate post-partum umbilical cord arterial (UCA) pH with neonatal outcome.Methods: This prospective observational study was conducted at tertiary care centre in North India. After informed and written consent, 100 pregnant women with singleton live pregnancy of gestational age ≥32 weeks admitted in labour, were subjected to admission NST and immediately after delivery sample for UCA pH was taken. Clinically relevant neonatal outcome was correlated with admission NST and UCA pH. Appropriate statistical tests were used and p-value <0.05 taken as significant.Results: Admission NST was normal, suspicious, pathological in 67%, 27%, 6% subjects, respectively. Study found statistically significant correlation between admission NST and UC...

BACKGROUND The highly contagious Coronavirus disease (COVID-19) pandemic affected nearly all nati... more BACKGROUND The highly contagious Coronavirus disease (COVID-19) pandemic affected nearly all nations across the world. It was emerged as most swiftly affected disease across the world and more than 2934 lakhs population suffered in four months of the time period as on date April 26, 2020. Its first epicenter was at Wuhan city of China during the month of December 2019. Currently, the most affected people and new epicenter of Coronavirus is at the United States of America (USA). It is identified as the most severe pandemic disease in human history during the past 100 years. Due to non-availability of specific medication, the World Health Organization (WHO) suggested various measures of precautions and social distance in between the people for the restricting the spread of the COVID-19 disease. Various nation’s administration including the India government called for the regional and local lockdown. OBJECTIVE We predicted the confirmed COVID-19 cases for next May-2020 month, map the m...

Australian Journal of Mechanical Engineering, 2018

AA6082 matrix hybrid composites reinforced with different weight percentages (wt. %) of (SiC + Gr... more AA6082 matrix hybrid composites reinforced with different weight percentages (wt. %) of (SiC + Gr) ceramic particulates by conventional stir casting process is manufactured. The weight percentage of ceramic powder is varied from 4 wt. % to 12 wt. % in a stage of 4 wt. %. The microstructures, physical properties such as density and porosity, as well as mechanical properties like hardness and tensile strength of the fabricated hybrid composites, are analysed. The optical micrographs reveal the uniform distribution of (SiC + Gr) ceramic particulates in the aluminium matrix. Density and porosity of hybrid composite increases from 2.69 to 2.75 g/cm 3 and 0.37% to 1.23% with increase in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 wt. % to 12 wt. % respectively. Both the hardness and ultimate tensile strength have enhanced from 52 to 84 VHN and 163 to 189 MPa, respectively, with a reduction in percentage elongation from 8.6 to 5.2 with rise in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 wt. % to 12 wt. %, respectively.

Materials Today: Proceedings, 2020

In the present research work aluminium matrix composites were manufactured by taking Al 2 O 3 cer... more In the present research work aluminium matrix composites were manufactured by taking Al 2 O 3 ceramic particles as reinforcement; while AA2014 alloy was taken as metal matrix for developing composite material. The homogeneous scattering of Al 2 O 3 ceramic particles in the developed materials was investigated by Scanning electron micrographs (SEM). The hardness, tensile strength and toughness of the manufactured composites were improved from 47.9 VHN to 69 VHN, from 163 MPa to 206 MPa and from 55 J/m 3 to 75 J/m 3 respectively; with increase in the Al 2 O 3 contents from 0% to 15 wt%. Also a decrease in ductility from 8.4% to 3.1% was observed with the increase in Al 2 O 3 contents from 0% to 15 wt%.

Materials Today: Proceedings, 2020

In the present research work aluminium matrix composites were manufactured by taking SiC as reinf... more In the present research work aluminium matrix composites were manufactured by taking SiC as reinforcement; while Al2024 alloy was taken as metal matrix. Weight percentages of SiC particles were varied as 0, 2, 4, 6 and 8 wt%. Particle size of SiC reinforcement in the range of 30-50 lm was used to develop composite materials for investigation. Aluminium matrix Composites (AMCs) were manufactured by liquid casting technique. The hardness and tensile strength of material was improved from 51 VHN to 74 VHN and from 163 MPa to 186 MPa respectively; with increase in the SiC contents from 0% to 8 wt%. A decrease in ductility from 8.6 to 5.1 was observed with the increase in SiC contents from 0% to 8 wt%.

Remote Sensing in Earth Systems Sciences, 2020

Greenhouse gases are the most responsible for climate change due to global warming. The Himalayan... more Greenhouse gases are the most responsible for climate change due to global warming. The Himalayan region, which covers eight countries across Asia, is home to some of the world's largest and most spectacular glaciers. In the Himalaya, large areas are covered by glaciers and seasonal snow. They are an important source of water for the Himalayan rivers. The Himalaya has been a perennial source of attraction, curiosity, and challenge to human intellect throughout the ages. Among several assets, the vegetation provides an everlasting and interesting field of investigation. The results of this study are highly relevant to glaciers in the central Himalaya, which exhibit some of the most rapid retreat rates on earth in recent decades. This paper is an attempt to examine the variations in vegetation line and timber line altitude using Normalized Difference Vegetation Index and Normalized Difference Snow Index in Pinder Watershed, Uttarakhand (India). Landsat satellite imageries of four decades (1990, 2001, 2011, and 2019) were used to quantify vegetation line and timber line altitude. In the last few decades, the impact of human activities as well as climatic impact in glacier has become more accelerated and pronounced. Heavy biotic pressures have started to exert tremendous stress on natural resources and hence many of the plant species are under various degree of threat. So, human beings need to be educated for understanding, solution, and preventing of these problems.

NOVYE OGNEUPORY (NEW REFRACTORIES), 2020

AA7075-xZrB 2 (x = 0, 5, 10, 15, and 20 wt.%) composites were manufactured by reacting potassium ... more AA7075-xZrB 2 (x = 0, 5, 10, 15, and 20 wt.%) composites were manufactured by reacting potassium zirconium fluoride (K 2 ZrF 6) and potassium tetrafluoroborate (KBF 4) with molten AA7075 at 800°C. The ZrB 2 particles formed by the reaction were fairly uniformly distributed throughout the whole composite. The microhardness of the composites increased from 45 to 78 VHN with ZrB 2 contents from 0 to 20 wt.%, respectively. The wear rate rose as the load and sliding distance increased and fell as the sliding speed increased. The material-removal mechanism of the composites was due to abrasive wear.

Powder Metallurgy and Metal Ceramics, 2019

In the present research work, an attempt has been made to make Mg-alloy specimen by powder metall... more In the present research work, an attempt has been made to make Mg-alloy specimen by powder metallurgy. Due to sensitivity of the material, a proper selection of sintering atmosphere has been made. Mg powder along with other powders has been blended with a high energy ball mill. In this work, the effect of input parameters, such as compaction pressure, sintering temperature and sintering time was investigated on porosity, microhardness and dimensional change. The compaction pressure and sintering temperature play a significant role in the porosity and microhardness. Increasing the compaction pressure plays a positive role in the microhardness. The maximum value of the porosity in the present work was up to 37.41%. The dimensional expansion after sintering varies from 2 to 4.3%. The results of the porosity and microhardness were verified by scanning electron microscopy and X-ray diffraction.

International Research Journal Of Pharmacy, 2019

Benzimidazoles have been considered as one of the most potent and biologically active class in me... more Benzimidazoles have been considered as one of the most potent and biologically active class in medicinal chemistry. A wide variety of benzimidazole analogs have been synthesized so far and screened for their chemotherapeutic importance. In this study, a novel series of acetamide linked azetidinonebenzimidazole analogs have been synthesized to explore the improvement in antibacterial potential with variations in its structure. The derivatives were synthesized by reaction of the Schiff base of 2-phenylbenzimidazole with triethylamine, 1,4-dioxane and chloroacetyl chloride. Thin layer chromatography was used to check the purity of synthesized derivatives and structure of compounds was elucidated using IR, 1 HNMR and mass spectrometry. Both Gram-negative strains (E. coli and P. aeruginosa) and Gram positive strains (S. aureus and B. subtilis) were used to check the antibacterial activity of synthesized derivatives with cup and plate method. Against the above-mentioned microbes, all the synthesized azetidinonebenzimidazole derivatives exhibited good activity.

Refractories and Industrial Ceramics, 2019

Hybrid aluminum matrix composites (HAMCs) reinforced with different amounts of ceramic particulat... more Hybrid aluminum matrix composites (HAMCs) reinforced with different amounts of ceramic particulates consisting of silicon carbide (SiC) and graphite (Gr) were developed. The amount of ceramic powder was 5 – 15 mass%. Parameters of the hybrid composites such as microstructure, density, and porosity and mechanical properties such as hardness and tensile strength were analyzed. Scanning-electron-microscope photomicrographs showed a uniform distribution of (SiC + Gr) particles in the Al matrix. The density and porosity of the hybrid composite increased from 2.69 to 2.72 g/cm3 and from 0.37 to 1.20%, respectively; Vickers hardness and tensile strength, from 49.5 to 85 VHN and from 161.5 to 187 MPa, respectively. The relative elongation decreased from 8.6 for 5.3 as the content of ceramic particulates (SiC + Gr) increased from 0 to 15 mass%.

Journal of Asian Ceramic Societies, 2017

The current research work scrutinizes aluminium alloy 6101-graphite composites for their mechanic... more The current research work scrutinizes aluminium alloy 6101-graphite composites for their mechanical and tribological behaviour in dry sliding environments. The orthodox liquid casting technique had been used for the manufacturing of composite materials and imperilled to T6 heat treatment. The content of reinforcement particles was taken as 0, 4, 8, 12 and 16 wt.% of graphite to ascertain it is prospective as self-lubricating reinforcement in sliding wear environments. Hardness, tensile strength and flexural strength of cast Al6101 metal matrix and manufactured composites were evaluated. Hardness, tensile strength and flexural strength decreases with increasing volume fraction of graphite reinforcement as compared to cast Al6101 metal matrix. Wear tests were performed on pin on disc apparatus to assess the tribological behaviour of composites and to determine the optimum volume fraction of graphite for its minimum wear rate. Wear rate reduces with increase in graphite volume fraction and minimum wear rate was attained at 4 wt.% graphite. The wear was found to decrease with increase in sliding distance. The average coefficient of friction also reduces with graphite addition and its minimum value was found to be at 4 wt.% graphite. The worn surfaces of wear specimens were studied through scanning electron microscopy. The occurrence of 4 wt.% of graphite reinforcement in the composites can reveal loftier wear possessions as compared to cast Al6101 metal matrix.

Lecture Notes in Mechanical Engineering

The aim of this work is to evaluate the performance of portable thermoelectric refrigerator for v... more The aim of this work is to evaluate the performance of portable thermoelectric refrigerator for vehicles (cars, trucks and buses). Thermoelectric refrigerator is based on the principle of a Peltier effect. TES-12704 thermoelectric module has been used in fabrication and tested. The cooling temperature of fin attached with thermoelectric module inside the refrigerator is measured and compared in natural and forced mode. The thermoelectric refrigerator is advantageous to keep perishable items at low temperature during travelling of the people. The results show that forced mode of producing cooling effect inside the thermoelectric refrigerator gave better performance as compared to natural mode-based thermoelectric refrigerator.

Materials Today: Proceedings, 2020

Abstract Aluminium metal matrix composite of AA2014 reinforced with 10 wt% of Al2O3 reinforcement... more Abstract Aluminium metal matrix composite of AA2014 reinforced with 10 wt% of Al2O3 reinforcement was manufactured by liquid casting mode. Wear was estimated on specimens prepared according to ASTM G99-95a standard at room temperature. Pin on disc apparatus was used to evaluate the wear of specimens. Wear rate enlarged with a raise in the load and sliding distance; whereas reduced with raise in sliding speed. The material removal mechanism was found due to abrasive wear.

i-manager's Journal on Material Science, 2015

Table S1. List of Salmonella serovars tested for the specificity of wild type Salmonella Typhimur... more Table S1. List of Salmonella serovars tested for the specificity of wild type Salmonella Typhimurium PCR. (DOCX 15 kb)

FPGAs are increasingly being used in the high performance and scientific computing community to i... more FPGAs are increasingly being used in the high performance and scientific computing community to implement floating-point based hardware accelerators. We present FPGA floating-point multiplication. Such circuits can be extremely useful in the FPGA implementation of complex systems that benefit from the reprogramability and parallelism of the FPGA device but also require a general purpose multiplier unit. While previous work has considered circuits for low precision floatingpoint formats, we consider the implementation of 32-bit Single precision circuits that also provide rounding and exception handling. We introduce an algorithm for multiplication and analyze its performance on Virtex2P hardware module at speed grade -7.

Journal of entomology and zoology studies, 2019

The aim of the present study was to survey the impact of different doses of paracetamol on micron... more The aim of the present study was to survey the impact of different doses of paracetamol on micronucleus frequency and other morphological deformities of erythrocytes of fish Cyprinus carpio. A total of 18 fish were divided in to three groups. Group A served as control while group B and C were given treatment with 5mg/l and 10 mg/l of paracetamol. Behaviour of the exposed fish was observed. Increase in pigmentation, high breathing rate, surface gulfing was observed in treatment groups. Blood samples were taken the from caudal vein after 7 and 14 days of exposure. Micronucleated cells, Binucleated cells, fragmented DNA, lobed nucleus, notched nucleus were scored under nuclear deformities and cytoplasmic vacuole and karyolysis were considered as cytoplasmic deformities. A significant increase in values of all the nuclear and cytoplasmic deformities have been observed in dose as well as time dependent manner except for karyolysis cells. Highest effect was observed at the highest concent...

A study was conducted to determine and compare the efficacy of fenbendazole and oxyclozanide-tetr... more A study was conducted to determine and compare the efficacy of fenbendazole and oxyclozanide-tetramisole combination against gastrointestinal nematodes in naturally infected Gaddi goats. On treatment, both the groups i.e. fenbendazole at 7.5 mg / kg bo dy weight and oxyclozanide-tetramisole combination at 1 ml / 3 kg body weight showed a significant reduction in egg counts on day 7 and da y 14 post treatment (DPT). However, group treated with fenbendazole showed more efficacy even on day 21 post treatment when compared to the other group.

Veterinary Research Communications, 2021

An outbreak of sheeppox was investigated in a cluster of villages situated in Western Himalayan r... more An outbreak of sheeppox was investigated in a cluster of villages situated in Western Himalayan ranges of a Northern Indian state. Non-migratory sheep ( n = 80) of native breeds namely Gaddi and Rampur Bushair were infected and 15 have died. The outbreak started after a few animals contracted the disease during the summer grazing period at the highland pastures from migrating flocks of sheep. This initial outbreak resulted in a further spreading of the disease into the valley. Clinical examination revealed varying degree of cutaneous papular lesions and respiratory distress. Upon necropsy, visceral lesions in the lungs, trachea and kidneys were also found. Clinical and morbid samples were found positive for sheeppox virus using group specific P32 gene and I3L gene based multiplex PCR differentiating sheeppox and goatpox viruses. Histopathological, hematological and blood biochemical analysis also supported the pathology of an acute viral infection. The causative sheeppox virus strain was isolated using lamb testicular cell culture and phylogenetic analysis, based upon P32 and RPO30 genes, showed its clustering with other Indian strains reported from neighboring states. This study demonstrated the spread of sheeppox virus to new niches by migratory sheep flocks leading to establishment of endemic infections in many new pockets of higher Western Himalayas.

Journal of the Mechanical Behavior of Materials, 2018

The current research work focuses on the mechanical and tribological behavior of an NiTi shape me... more The current research work focuses on the mechanical and tribological behavior of an NiTi shape memory alloy (SMA) processed with the help of powder metallurgy. SMAs have found applications in the medical, space and aerospace industries with usage in the manufacturing of microelectromechanicals (MEMS) and as actuators in the electronic industry. The wear behavior of a material greatly affects its performance. The wear behavior of an SMA can be determined with the help of the dry abrasion test. The increase in binder content and rotational speed at a constant load increases the wear rate of SMA alloys. The coefficient of friction decreases with the usage of alloys. A decrease in density has been found, as well as porosity, with the increasing content of binder in the alloy. Density decreases from 6.7 to 5.1 g/cm3 while porosity decreases from 57 to 23% with increased binder content. Scanning electron microscopy (SEM) and X-ray diffraction has been used for the investigation of surface...

International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 2020

Background: Continuous electronic fetal monitoring in labour has become a standard practice in de... more Background: Continuous electronic fetal monitoring in labour has become a standard practice in developed countries; this may not be possible in low middle-income countries. So, this study was conducted to correlate admission non stress test (NST) and immediate post-partum umbilical cord arterial (UCA) pH with neonatal outcome.Methods: This prospective observational study was conducted at tertiary care centre in North India. After informed and written consent, 100 pregnant women with singleton live pregnancy of gestational age ≥32 weeks admitted in labour, were subjected to admission NST and immediately after delivery sample for UCA pH was taken. Clinically relevant neonatal outcome was correlated with admission NST and UCA pH. Appropriate statistical tests were used and p-value <0.05 taken as significant.Results: Admission NST was normal, suspicious, pathological in 67%, 27%, 6% subjects, respectively. Study found statistically significant correlation between admission NST and UC...

BACKGROUND The highly contagious Coronavirus disease (COVID-19) pandemic affected nearly all nati... more BACKGROUND The highly contagious Coronavirus disease (COVID-19) pandemic affected nearly all nations across the world. It was emerged as most swiftly affected disease across the world and more than 2934 lakhs population suffered in four months of the time period as on date April 26, 2020. Its first epicenter was at Wuhan city of China during the month of December 2019. Currently, the most affected people and new epicenter of Coronavirus is at the United States of America (USA). It is identified as the most severe pandemic disease in human history during the past 100 years. Due to non-availability of specific medication, the World Health Organization (WHO) suggested various measures of precautions and social distance in between the people for the restricting the spread of the COVID-19 disease. Various nation’s administration including the India government called for the regional and local lockdown. OBJECTIVE We predicted the confirmed COVID-19 cases for next May-2020 month, map the m...

Australian Journal of Mechanical Engineering, 2018

AA6082 matrix hybrid composites reinforced with different weight percentages (wt. %) of (SiC + Gr... more AA6082 matrix hybrid composites reinforced with different weight percentages (wt. %) of (SiC + Gr) ceramic particulates by conventional stir casting process is manufactured. The weight percentage of ceramic powder is varied from 4 wt. % to 12 wt. % in a stage of 4 wt. %. The microstructures, physical properties such as density and porosity, as well as mechanical properties like hardness and tensile strength of the fabricated hybrid composites, are analysed. The optical micrographs reveal the uniform distribution of (SiC + Gr) ceramic particulates in the aluminium matrix. Density and porosity of hybrid composite increases from 2.69 to 2.75 g/cm 3 and 0.37% to 1.23% with increase in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 wt. % to 12 wt. % respectively. Both the hardness and ultimate tensile strength have enhanced from 52 to 84 VHN and 163 to 189 MPa, respectively, with a reduction in percentage elongation from 8.6 to 5.2 with rise in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 wt. % to 12 wt. %, respectively.

Materials Today: Proceedings, 2020

In the present research work aluminium matrix composites were manufactured by taking Al 2 O 3 cer... more In the present research work aluminium matrix composites were manufactured by taking Al 2 O 3 ceramic particles as reinforcement; while AA2014 alloy was taken as metal matrix for developing composite material. The homogeneous scattering of Al 2 O 3 ceramic particles in the developed materials was investigated by Scanning electron micrographs (SEM). The hardness, tensile strength and toughness of the manufactured composites were improved from 47.9 VHN to 69 VHN, from 163 MPa to 206 MPa and from 55 J/m 3 to 75 J/m 3 respectively; with increase in the Al 2 O 3 contents from 0% to 15 wt%. Also a decrease in ductility from 8.4% to 3.1% was observed with the increase in Al 2 O 3 contents from 0% to 15 wt%.

Materials Today: Proceedings, 2020

In the present research work aluminium matrix composites were manufactured by taking SiC as reinf... more In the present research work aluminium matrix composites were manufactured by taking SiC as reinforcement; while Al2024 alloy was taken as metal matrix. Weight percentages of SiC particles were varied as 0, 2, 4, 6 and 8 wt%. Particle size of SiC reinforcement in the range of 30-50 lm was used to develop composite materials for investigation. Aluminium matrix Composites (AMCs) were manufactured by liquid casting technique. The hardness and tensile strength of material was improved from 51 VHN to 74 VHN and from 163 MPa to 186 MPa respectively; with increase in the SiC contents from 0% to 8 wt%. A decrease in ductility from 8.6 to 5.1 was observed with the increase in SiC contents from 0% to 8 wt%.

Remote Sensing in Earth Systems Sciences, 2020

Greenhouse gases are the most responsible for climate change due to global warming. The Himalayan... more Greenhouse gases are the most responsible for climate change due to global warming. The Himalayan region, which covers eight countries across Asia, is home to some of the world's largest and most spectacular glaciers. In the Himalaya, large areas are covered by glaciers and seasonal snow. They are an important source of water for the Himalayan rivers. The Himalaya has been a perennial source of attraction, curiosity, and challenge to human intellect throughout the ages. Among several assets, the vegetation provides an everlasting and interesting field of investigation. The results of this study are highly relevant to glaciers in the central Himalaya, which exhibit some of the most rapid retreat rates on earth in recent decades. This paper is an attempt to examine the variations in vegetation line and timber line altitude using Normalized Difference Vegetation Index and Normalized Difference Snow Index in Pinder Watershed, Uttarakhand (India). Landsat satellite imageries of four decades (1990, 2001, 2011, and 2019) were used to quantify vegetation line and timber line altitude. In the last few decades, the impact of human activities as well as climatic impact in glacier has become more accelerated and pronounced. Heavy biotic pressures have started to exert tremendous stress on natural resources and hence many of the plant species are under various degree of threat. So, human beings need to be educated for understanding, solution, and preventing of these problems.

NOVYE OGNEUPORY (NEW REFRACTORIES), 2020

AA7075-xZrB 2 (x = 0, 5, 10, 15, and 20 wt.%) composites were manufactured by reacting potassium ... more AA7075-xZrB 2 (x = 0, 5, 10, 15, and 20 wt.%) composites were manufactured by reacting potassium zirconium fluoride (K 2 ZrF 6) and potassium tetrafluoroborate (KBF 4) with molten AA7075 at 800°C. The ZrB 2 particles formed by the reaction were fairly uniformly distributed throughout the whole composite. The microhardness of the composites increased from 45 to 78 VHN with ZrB 2 contents from 0 to 20 wt.%, respectively. The wear rate rose as the load and sliding distance increased and fell as the sliding speed increased. The material-removal mechanism of the composites was due to abrasive wear.

Powder Metallurgy and Metal Ceramics, 2019

In the present research work, an attempt has been made to make Mg-alloy specimen by powder metall... more In the present research work, an attempt has been made to make Mg-alloy specimen by powder metallurgy. Due to sensitivity of the material, a proper selection of sintering atmosphere has been made. Mg powder along with other powders has been blended with a high energy ball mill. In this work, the effect of input parameters, such as compaction pressure, sintering temperature and sintering time was investigated on porosity, microhardness and dimensional change. The compaction pressure and sintering temperature play a significant role in the porosity and microhardness. Increasing the compaction pressure plays a positive role in the microhardness. The maximum value of the porosity in the present work was up to 37.41%. The dimensional expansion after sintering varies from 2 to 4.3%. The results of the porosity and microhardness were verified by scanning electron microscopy and X-ray diffraction.

International Research Journal Of Pharmacy, 2019

Benzimidazoles have been considered as one of the most potent and biologically active class in me... more Benzimidazoles have been considered as one of the most potent and biologically active class in medicinal chemistry. A wide variety of benzimidazole analogs have been synthesized so far and screened for their chemotherapeutic importance. In this study, a novel series of acetamide linked azetidinonebenzimidazole analogs have been synthesized to explore the improvement in antibacterial potential with variations in its structure. The derivatives were synthesized by reaction of the Schiff base of 2-phenylbenzimidazole with triethylamine, 1,4-dioxane and chloroacetyl chloride. Thin layer chromatography was used to check the purity of synthesized derivatives and structure of compounds was elucidated using IR, 1 HNMR and mass spectrometry. Both Gram-negative strains (E. coli and P. aeruginosa) and Gram positive strains (S. aureus and B. subtilis) were used to check the antibacterial activity of synthesized derivatives with cup and plate method. Against the above-mentioned microbes, all the synthesized azetidinonebenzimidazole derivatives exhibited good activity.

Refractories and Industrial Ceramics, 2019

Hybrid aluminum matrix composites (HAMCs) reinforced with different amounts of ceramic particulat... more Hybrid aluminum matrix composites (HAMCs) reinforced with different amounts of ceramic particulates consisting of silicon carbide (SiC) and graphite (Gr) were developed. The amount of ceramic powder was 5 – 15 mass%. Parameters of the hybrid composites such as microstructure, density, and porosity and mechanical properties such as hardness and tensile strength were analyzed. Scanning-electron-microscope photomicrographs showed a uniform distribution of (SiC + Gr) particles in the Al matrix. The density and porosity of the hybrid composite increased from 2.69 to 2.72 g/cm3 and from 0.37 to 1.20%, respectively; Vickers hardness and tensile strength, from 49.5 to 85 VHN and from 161.5 to 187 MPa, respectively. The relative elongation decreased from 8.6 for 5.3 as the content of ceramic particulates (SiC + Gr) increased from 0 to 15 mass%.

Journal of Asian Ceramic Societies, 2017

The current research work scrutinizes aluminium alloy 6101-graphite composites for their mechanic... more The current research work scrutinizes aluminium alloy 6101-graphite composites for their mechanical and tribological behaviour in dry sliding environments. The orthodox liquid casting technique had been used for the manufacturing of composite materials and imperilled to T6 heat treatment. The content of reinforcement particles was taken as 0, 4, 8, 12 and 16 wt.% of graphite to ascertain it is prospective as self-lubricating reinforcement in sliding wear environments. Hardness, tensile strength and flexural strength of cast Al6101 metal matrix and manufactured composites were evaluated. Hardness, tensile strength and flexural strength decreases with increasing volume fraction of graphite reinforcement as compared to cast Al6101 metal matrix. Wear tests were performed on pin on disc apparatus to assess the tribological behaviour of composites and to determine the optimum volume fraction of graphite for its minimum wear rate. Wear rate reduces with increase in graphite volume fraction and minimum wear rate was attained at 4 wt.% graphite. The wear was found to decrease with increase in sliding distance. The average coefficient of friction also reduces with graphite addition and its minimum value was found to be at 4 wt.% graphite. The worn surfaces of wear specimens were studied through scanning electron microscopy. The occurrence of 4 wt.% of graphite reinforcement in the composites can reveal loftier wear possessions as compared to cast Al6101 metal matrix.