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- 저자 : Chawla, Saniya (검색결과 53 건)
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Chawla, P. Cheena,Chawla, Anil Kumar,Shrivastava, Richa,Shrivastava, Anju,Chaudhary, Seema Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.13
Cervical cancer, the second most common malignancy all over the world, is associated with HPV infection. In a developing country like India, lack of early detection and treatment facilities is the main cause for its high burden. Therefore, through our study we e tried to present the current scenario of existing facilities for the detection and treatment of cervical cancer in hospitals and primary health centers (PHCs) of Delhi-NCR region. Data were collected from 312 healthcare facilities including public and private hospitals and PHCs of all nine districts from Delhi-NCR region. Healthcare providers including gynecologists, medical officers, women health care providers and paramedical staff were interviewed, using a questionnaire; the facilities for screening, diagnosing, and treating cervical cancer in each institution were recorded, using a previously designed checklist. Our study has shown that the basic facilities for the detection and treatment of cervical cancer are abhorrently lacking in Public hospitals and PHCs as compared to the Private hospitals in Delhi-NCR region. This study demonstrates that there is an urgent need for more investment in the diagnosis and treatment of cervical cancer facilities in public and rural healthcare facilities of Delhi-NCR region.
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Chawla, S. P.,Jo, C.,Kang, H. J.,Kim, M. J.,Byun, M. W. The Korean Society of Food Science and Nutrition 2003 Preventive Nutrition and Food Science Vol.8 No.4
Effects of extraction conditions, gamma-irradiation and storage conditions on bioactivities of Citrus (Citrus unshiu) peel extract were investigated. The Hunter color $L^{*}$- and $a^{*}$-values of the extract increased but $b^{*}$-value decreased with an increase in absorbed irradiation dose. DPPH radical scavenging, tyrosinase inhibition and nitrite scavenging activities were not affected by irradiation but reduced by increased storage time. Nitrite scavenging activity of the extract was the highest at pH 1.2 followed by pH 4.2 and 6.0 and not changed by storage. Results indicated that there is potential for using citrus peel byproducts as a bioactive ingredient, and that gamma irradiation brightens the color of the extract without adversely altering its biological activity.ity.
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Chawla J. K. 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.7
The large amplitude of ion-acoustic double layers (DLs) in a plasma consisting of ions, positrons, and cold and hot superthermal electrons is considered using the pseudo-potential method (SPM). An energy integral equation for the system has been derived with the help of the SPM, and compressive double layers are found to exist in the plasma system for a selected set of plasma parameters. The effects of the spectral indexes of hot electrons ( kh) and cold electrons ( kc), the temperature ratio of the two species of electrons (1), positron concentration (), ionic temperature ratio (), positron temperature ratio () , and Mach number (M) on the characteristics of the large-amplitude ion-acoustic DLs are discussed in detail. The amplitude of the DLs increases with increasing temperature ratio of the two species of electrons (1), positron concentration (), ionic temperature ratio (), positron temperature ratio () , and Mach number (M), but a decrease in the spectral indexes ( kh, kc) increases the amplitude of the DLs. The results of this research may be useful for understanding of nonlinear DLs in space plasma environments where positrons, ions, and hot and cold superthermal electrons are present (e.g., pulsar magnetospheres, early universe, nucleon stars, active galactic nuclei, and star atmospheres).
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CHAWLA, SHEETAL,RAO, S. CHANDRA SEKHARA The Korean Society for Computational and Applied M 2015 Journal of applied mathematics & informatics Vol.33 No.5
We consider a weakly coupled system of singularly perturbed convection-diffusion equations with discontinuous source term. The diffusion term of each equation is associated with a small positive parameter of different magnitude. Presence of discontinuity and different parameters creates boundary and weak interior layers that overlap and interact. A numerical method is constructed for this problem which involves an appropriate piecewise uniform Shishkin mesh. The numerical approximations are proved to converge to the continuous solutions uniformly with respect to the singular perturbation parameters. Numerical results are presented which illustrates the theoretical results.
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Career Selective Si Solar Cells: Modelling and Performance Metrics Evaluation
Rashmi Chawla,Poonam Singhal,Amit Kumar Garg 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.5
Silicon (Si) junctionless solar Photo Voltaic Cells (PVCs) with semiconducting carrier selective blocking layer can modify output efficiency of solar cell. In this research work, we have proposed use of both electron–hole selective layer in Si solar cell with SILVACO simulation. This paper simulates and evaluates two possible electron-selective oxides (TiO2 and ZnO) and two possible hole-selective oxides (CuAlO2 and NiO). The results in terms of solar performance metric is compared and further TiO2 and NiO as carrier selective layers are proposed. The simulation results suggest the fermi level pinning on the device as a reason for increase in output efficiency. This research work comprehends a considerable understanding to band-engineer selective contact semiconducting oxide Si junctionless solar cell device. The performance parameters with Jsc = 10.08 mA/cm 2 , Voc = 2.69 V, fi ll factor (FF) = 99.8% and conversion efficiency of 27.09% (1 sun) are obtained underAM1.5G illumination.
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Sheetal Chawla,S. Chandra Sekhara Rao 한국전산응용수학회 2015 Journal of applied mathematics & informatics Vol.33 No.5
We consider a weakly coupled system of singularly perturbed convection-diffusion equations with discontinuous source term. The diffusion term of each equation is associated with a small positive parameter of different magnitude. Presence of discontinuity and different parameters creates boundary and weak interior layers that overlap and interact. A numerical method is constructed for this problem which involves an appropriate piecewise uniform Shishkin mesh. The numerical approximations are proved to converge to the continuous solutions uniformly with respect to the singular perturbation parameters. Numerical results are presented which illustrates the theoretical results.
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Harshita Chawla,Amrish Chandra,Pravin Popinand Ingole,Seema Garg 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.95 No.-
In the recent past decade, layered bismuth metal oxides (Bi2MO6, M = W, Mo and Cr) have establishedsubstantial consideration comparable to bismuth oxyhalides (BiOX, X = Cl, Br, I and F) for its emergingpotential towards its photocatalytic applications in clean energy production and environmentalremediation. Their electronic band structure characterises appropriate band-gap for visible lightphotocatalytic activity. The photocatalytic activities of these materials can be deliberately incrementedusing various strategies including formation of heterojunction, modification of interface, usingsensitizers, metal and non-metal doping, development of composites, and formation of oxygenvacancies. Nevertheless, its visible light applications limit up due to higher recombination ofphotoinduced charge carriers. This review systematically encapsulates electronic spectra, strategiesimplemented for higher separation of charge carriers, and establishing its potential in thefield of cleanenergyproduction as well as degrading manageable and recalcitrant pollutants. Finally, the currentscenario and future aspects of using Bi2MO6 photocatalysts are summarised.
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Simmi Chawla,Parul Tomar,Sapna Gambhir International Journal of Computer ScienceNetwork S 2024 International journal of computer science and netw Vol.24 No.4
India is a developing nation and has come with comprehensive way in modernizing its reducing poverty, economy and rising living standards for an outsized fragment of its residents. The STEM (Science, Technology, Engineering, and Mathematics) education plays an important role in it. STEM is an educational curriculum that emphasis on the subjects of "science, technology, engineering, and mathematics". In traditional education scenario, these subjects are taught independently, but according to the educational philosophy of STEM that teaches these subjects together in project-based lessons. STEM helps the students in his holistic development. Youth unemployment is the biggest concern due to lack of adequate skills. There is a huge skill gap behind jobless engineers and the question arises how we can prepare engineers for a better tomorrow? Now a day's Industry 4.0 is a new fourth industrial revolution which is an intelligent networking of machines and processes for industry through ICT. It is based upon the usage of cyber-physical systems and Internet of Things (IoT). Industrial revolution does not influence only production but also educational system as well. IoT in academics is a new revolution to the Internet technology, which introduced "Smartness" in the entire IT infrastructure. To improve socio-economic status of the India students must equipped with 21st century digital skills and Universities, colleges must provide individual learning kits to their students which can help them in enhancing their productivity and learning outcomes. The major goal of this paper is to present a low cost, effective learning mechanism for STEM implementation using Raspberry Pi 3+ model (Single board computer) and Node Red open source visual programming tool which is developed by IBM for wiring hardware devices together. These tools are broadly used to provide hands on experience on IoT fundamentals during teaching and learning. This paper elaborates the appropriateness and the practicality of these concepts via an example by implementing a user interface (UI) and Dashboard in Node-RED where dashboard palette is used for demonstration with switch, slider, gauge and Raspberry pi palette is used to connect with GPIO pins present on Raspberry pi board. An LED light is connected with a GPIO pin as an output pin. In this experiment, it is shown that the Node-Red dashboard is accessing on Raspberry pi and via Smartphone as well. In the final step results are shown in an elaborate manner. Conversely, inadequate Programming skills in students are the biggest challenge because without good programming skills there would be no pioneers in engineering, robotics and other areas. Coding plays an important role to increase the level of knowledge on a wide scale and to encourage the interest of students in coding. Today Python language which is Open source and most demanding languages in the industry in order to know data science and algorithms, understanding computer science would not be possible without science, technology, engineering and math. In this paper a small experiment is also done with an LED light via writing source code in python. These tiny experiments are really helpful to encourage the students and give play way to learn these advance technologies. The cost estimation is presented in tabular form for per learning kit provided to the students for Hands on experiments. Some Popular In addition, some Open source tools for experimenting with IoT Technology are described. Students can enrich their knowledge by doing lots of experiments with these freely available software's and this low cost hardware in labs or learning kits provided to them.
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Akshay Chawla,Anita Sudhaik,Pankaj Raizada,Aftab Aslam Parwaz Khan,Archana Singh,Quyet Van Le,Van Huy Nguyen,Adem Sreedhar,Saad M. Alshehri,Abdullah M. Asiri,Pardeep Singh 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
Not just people, but all living species, desire a clean and green environment to live a happy and healthylife. However, in our ever-increasingly congested world, it is quite challenging. Excessive deforestation,factory smoke, various chemical compounds, agricultural chemicals, etc. all pollute our environmentseverely. Some of its adverse consequences include water contamination and a shortage of energy supplies. In recent times, photocatalysts have sparked tremendous attention as a means of addressing energydemands as well as environmental challenges (water pollution). For this, SnO2 and SnO2 based photocatalystshave gained a great attention due to its good photocatalytic ability. In the same way, SnO2-based Zschemephotocatalysts has extended significant interest to address these concerns due to its strong photocatalyticcharacteristics, energy savings, eco-friendliness, and lack of adverse health effects. Though, thephotocatalytic effectiveness of conventional SnO2 semiconductors, with their shortcomings, falls wellshort of the real requirements. The current review emphasizes on admirable properties and several synthesisprocesses of SnO2 which make it an ideal photocatalyst. This study also stresses the fundamentalshortcomings of SnO2 that restrict its utilization. The central section of this review is concentrated onSnO2-based Z-scheme photocatalysts and most recent significant research modification of Z-schemeSnO2-based photocatalysts. The photocatalytic applications of Z-scheme SnO2-based photocatalysts forpollutants removal, energy conversion, and water splitting are also summarized. In conclusion, we haveaddressed the challenges and future exploration of SnO2-based photocatalysts with a Z-scheme heterojunctiontype for pollutant degradation and energy conversion.
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