Proceedings of the National Academy of Sciences, India Section A: Physical Sciences最新文献_第8页

Advances in All Optical Spintronic Memory 全光自旋电子存储器的研究进展

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-05-15 DOI: 10.1007/s40010-023-00822-2

Chandrima Banerjee, Anjan Barman

{"title":"Advances in All Optical Spintronic Memory","authors":"Chandrima Banerjee, Anjan Barman","doi":"10.1007/s40010-023-00822-2","DOIUrl":"10.1007/s40010-023-00822-2","url":null,"abstract":"<div><p>The research in spintronics aims to advance the present memory and computation technology by engaging the spin degree of electron. The use of femtosecond optical pulses is relevant, which has shown to trigger the fastest changes in the magnetic state of matter, leading to the possibility of high speed and energy efficient opto-spintronic memory. In the past decade, the prospects of ultrafast opto-magnetic control in different materials were explored, leading to the discovery of all optical switching of magnetization, which showed promise for applications in technology as well as improved the fundamental understanding of light–spin interaction on ultrashort timescale. In this review, we presented the recent developments, advances and emerging research directions in optical control of magnetization, with an emphasis on the qualitative understanding of the physical processes involved under transient nonequilibrium state. Finally, we outlined the potential of integration of all optical magnetization switching with magnetic random access memory and other memory applications as least-dissipative and fastest method for magnetic writing.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 3","pages":"511 - 516"},"PeriodicalIF":0.9,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4625219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quasi Hemi-Slant Submanifolds of Metallic Riemannian Manifolds 金属黎曼曼体的准半斜子曼形

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-05-10 DOI: 10.1007/s40010-023-00826-y

Payel Karmakar, Arindam Bhattacharyya

引用次数: 0

ANFIS Computing for M/M/(infty) Queue with Two Types of Service Interruption and Balking 具有两种服务中断和逡巡的 M/M/(infty)队列的 ANFIS 计算

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-04-05 DOI: 10.1007/s40010-023-00821-3

Neetu Singh, Madhu Jain, Sibasish Dhibar

引用次数: 0

Lacunary Statistical Equivalence of Order (eta) for Double Sequences of Sets 集的二重序列的序的空缺统计等价(eta)

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-03-15 DOI: 10.1007/s40010-023-00818-y

Uğur Ulusu

引用次数: 0

Land Use/Cover Dynamics and its Implication in Alwero Watershed, Western Ethiopia 埃塞俄比亚西部Alwero流域土地利用/覆被动态及其意义

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-03-13 DOI: 10.1007/s40010-023-00820-4

Molla Maru, Mohammed Assen, Asnake Mekuriaw, Arragaw Alemayehu

{"title":"Land Use/Cover Dynamics and its Implication in Alwero Watershed, Western Ethiopia","authors":"Molla Maru, Mohammed Assen, Asnake Mekuriaw, Arragaw Alemayehu","doi":"10.1007/s40010-023-00820-4","DOIUrl":"10.1007/s40010-023-00820-4","url":null,"abstract":"<div><p>This study assesses land use and land cover (LULC) dynamics and their impacts in the Alwero watershed, in western Ethiopia. LULC datasets were created from Landsat imagery from 1973, 1987, 2002, and 2020 using ArcGIS 10.7® software. Results show that forest cover decreased from 52 to 30% between 1973 and 2020, mainly due to the expansion of cultivated land (small and large farms). Between 1973 and 2020, the number of small farms increased from 7.4 to 13.2%, with a net decrease in bare land (74.2%), grassland (19.7%), and forest (2.6%). Large farms increased from 1.5 to 7.2% between 2002 and 2020, with a net decrease in fallow (44%) and natural vegetation (19.4%). Fallow land shows a decreasing trend from 28% (1973) to 13% (2020), due to increased conversion to small farms (35.0%) and large farms (20.1%). The main causes of the changes are the rapid population growth and the large scale agricultural investments in the region. The deterioration of local people's living conditions and deforestation are the main impacts of LULC change in the study area. The innovative element of this study is the production of maps for large and small farms separately, which is useful for making decisions related to problems of large agricultural land investments (LALIs). The study concludes that the continued loss of forests will affect the government's development vision in general and mitigation of the negative impacts of climate change and climate variability in particular.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"377 - 389"},"PeriodicalIF":0.9,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4548051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Space of Wijsman (mu )-Deferred Cesàro I-Statistically Convergent of Order (a, b) Set Sequence Wijsman空间(mu ) -Deferred Cesàro i - Order (a, b)集合序列的统计收敛性

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-03-09 DOI: 10.1007/s40010-023-00816-0

Vakeel A Khan, Izhar Ali Khan, Bipan Hazarika

{"title":"Space of Wijsman (mu )-Deferred Cesàro I-Statistically Convergent of Order (a, b) Set Sequence","authors":"Vakeel A Khan, Izhar Ali Khan, Bipan Hazarika","doi":"10.1007/s40010-023-00816-0","DOIUrl":"10.1007/s40010-023-00816-0","url":null,"abstract":"<div><p>In this paper, we present the notions of Wijsman strongly ideal <span>(r-)</span>deferred Cesàro summability and Wijsman <span>(mu )</span>-deferred Cesàro <i>I</i>-statistical convergence of order (<i>a</i>, <i>b</i>) allied with modulus function <i>f</i> for a sequence of closed sets of a separable metric space <span>((mathcal {X},rho ))</span>. We also define their respective sequence spaces <span>( left[ {{text{DC}}left[ {p,q} right]_{W}^{{(a,b)}} (r,f)} right]^{I} )</span> and <span>( left[ {_{mu } {text{DS}}left[ {p,q} right]_{W}^{{(a,b)}} left( f right)} right]^{I} )</span>, respectively. We also prove that for <span>(ale b)</span>, the newly formed sequence space is well defined but for <span>( a>b )</span>, foresaid space is not well defined in general. Some inclusion relation-based results are also established with some counterexamples to support our results. At last, it is shown that if a bounded sequence of closed sets is Wijsman <span>(mu )</span>-deferred Cesàro <i>I</i>-statistical convergence of order (<i>a</i>, <i>b</i>), then it need not be Wijsman strongly ideal <span>(r-)</span>deferred Cesàro summable.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"321 - 329"},"PeriodicalIF":0.9,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4395156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation and Comparison of Nutritional Supplements (Elements and Compounds) in Various Tea Leaves using Spectroscopic Techniques 用光谱技术研究和比较不同茶叶中的营养补充品(元素和化合物)

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-03-09 DOI: 10.1007/s40010-023-00815-1

Tejmani Kumar, Abhishek Kumar Rai, Abhishek Dwivedi, Rohit Kumar, Awadhesh Kumar Rai

{"title":"Investigation and Comparison of Nutritional Supplements (Elements and Compounds) in Various Tea Leaves using Spectroscopic Techniques","authors":"Tejmani Kumar, Abhishek Kumar Rai, Abhishek Dwivedi, Rohit Kumar, Awadhesh Kumar Rai","doi":"10.1007/s40010-023-00815-1","DOIUrl":"10.1007/s40010-023-00815-1","url":null,"abstract":"<div><p>Qualitative and quantitative analyses of nutritional supplements and adulteration/toxic elements present in various tea leaves have been performed and compared. Rapid identification of inorganic (i.e., Ca, K, Na, Mg, Ba, Al, Sr, Mn) and organic (C, N, O, H) elements have been done using laser-induced breakdown (LIB) spectra of tea leaves. The electronic bands of the metal oxides (CaO, BaO, SrO, and AlO) are also identified. Molecular bands of CN and C<sub>2</sub> molecules in the LIB spectra show the presence of organic compounds in the tea samples. The concentration of the constituents of the tea samples has been determined using the calibration free (CF-LIBS) technique and results are further compared with results obtained by energy-dispersive X-ray (EDX) technique. The toxicity of the various tea leaves has been discussed based on the contents of Ba, Al, and Sr in each sample. The quantitative analysis of Na, K, and Mg may be helpful to control hypertension and chronic kidney disease. Principal component analysis (PCA) classifies the different samples based on their elemental constituents. In all tea leaves samples, the presence of amino acids, enzymes, pigments, carbohydrates, caffeine and nicotine has been established via photoacoustic spectroscopy (PAS). Further, the confirmation of the molecular bands of the tea leaves is done with (Fourier Transform Infrared) FTIR spectroscopic technique.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"413 - 422"},"PeriodicalIF":0.9,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4395989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Semi-I-Open Sets in Ideal Tritopological Spaces 理想三拓扑空间中的半开集

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-03-08 DOI: 10.1007/s40010-023-00814-2

Carlos Granados, Binod Chandra Tripathy, Suman Das

引用次数: 0

Invariant Projective Properties Under the Action of the Lie Group (textrm{SL}(3;mathbb {R})) on (mathbb{R}mathbb{P}^2) 李群(textrm{SL}(3;mathbb {R}))对(mathbb{R}mathbb{P}^2)作用下的不变射影性质

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-02-28 DOI: 10.1007/s40010-023-00813-3

Debapriya Biswas, Sandipan Dutta

引用次数: 0

The Microplastics: Their Occurrence and Impacts in India—A Review 微塑料:它们在印度的发生和影响——综述

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-02-24 DOI: 10.1007/s40010-023-00812-4

Karuppaiya Nanthini Devi, Piliyan Raju, Perumal Santhanam, Pachiappan Perumal

{"title":"The Microplastics: Their Occurrence and Impacts in India—A Review","authors":"Karuppaiya Nanthini Devi, Piliyan Raju, Perumal Santhanam, Pachiappan Perumal","doi":"10.1007/s40010-023-00812-4","DOIUrl":"10.1007/s40010-023-00812-4","url":null,"abstract":"<div><p>Plastics are commonly occurring in the marine environments. The presence of microplastics in most habitats in the open ocean, seas, beaches, surface waters, the water column and in Deep Ocean is recently reported in freshwater systems. The present review mainly focussed on the microplastics distribution and its impacts in India with special reference to plastic pollution in Indian Ocean and major nine coastal states of India. In India, microplastics pollution research along the Indian coastline and its impacts on the marine living organisms is poorly studied. Very few studies along the beaches of Indian coast have been carried out on the distribution pattern of microplastics. The occurrence of plastics in Indian Ocean and the potential impacts to the marine organisms are growing concerns. In India, Maharashtra, Gujarat and Tamil Nadu have conducted the awareness programmes for the plastic usage and control measures for better way to use recycle or degrade the plastic material and otherwise use clothes materials for different needful purposes. The existing knowledge about the plastic pollution and its impacts have created the awareness for industrialists, consumers and policy makers to develop the significant technological policy solutions to replace the plastics.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"205 - 210"},"PeriodicalIF":0.9,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4927345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3