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Learning two-phase microstructure evolution using neural operators and autoencoder architectures

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npj Computational Materials 2022年第1期8卷 1804-1816页

作者： Vivek Oommen Khemraj Shukla Somdatta goswami Rémi Dingreville George Em Karniadakis School of Engineering Brown UniversityProvidenceRIUSA Division of Applied Mathematics Brown UniversityProvidenceRIUSA Center for Integrated Nanotechnologies Sandia National LaboratoriesAlbuquerqueNM87185USA

Phase-field modeling is an effective but computationally expensive method for capturing the mesoscale morphological and microstructure evolution in ***,fast and generalizable surrogate models are needed to alleviate the cost of computationally taxing processes such as in optimization and design of *** intrinsic discontinuous nature of the physical phenomena incurred by the presence of sharp phase boundaries makes the training of the surrogate model *** develop a framework that integrates a convolutional autoencoder architecture with a deep neural operator(DeepONet)to learn the dynamic evolution of a two-phase mixture and accelerate time-to-solution in predicting the microstructure *** utilize the convolutional autoencoder to provide a compact representation of the microstructure data in a low-dimensional latent *** DeepONet is trained in the latent space,it can be used to replace the high-fidelity phase-field numerical solver in interpolation tasks or to accelerate the numerical solver in extrapolation tasks.

关键词： materials phase operators

Prevalence and risks of reproductive tract infections among women of urban slums in North India: A cross-sectional study

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Asian pacific Journal of Reproduction 2022年第6期11卷 253-260页

作者： Mitasha Singh Shipra Saini Pooja Goyal Ekta Gupta Shweta goswami Department of Community Medicine ESIC Medical College and HospitalFaridabadHaryanaIndia ICMR National Institute of Cancer Prevention and Research Sector 39NoidaGautam Budh NagarUttar PradeshIndia

Objective:To identify the prevalence,determinants of reproductive tract infection,and healthcare seeking behavior among ever married women of reproductive age residing in an urban slum of Faridabad,Haryana,North ***:This community based cross-sectional study was conducted among ever married women aged between 15 and 49 years insured under employees state insurance scheme and residing in an urban slum of *** random sampling technique was used to interview 149 eligible women using a predesigned structured *** variables included sociodemographic profile,family planning methods,menstrual absorbent usage,and symptoms of reproductive tract *** logistic regression was used to investigate the determinants of reproductive tract ***:Of the women,46.3%had at least one reproductive tract infection or sexually transmitted infection symptom and 28.9%among them sought treatment for the *** discharge,itching(14.1%)and lower abdominal pain(30.2%)were the major symptoms ***-usage of condoms as contraceptive was significantly associated with a higher rate of symptoms(50.4%vs.20.0%).Abortion had a significantly high odds of having reproductive tract infection symptoms(aOR 3.71,95%CI 1.59-8.62;P<0.01).Less frequent change in absorbent during menstruation was also reported to have a higher rate of *** majority of those who took treatment sought it from government or employees state insurance dispensary.2%also went to faith ***:Nearly half of the study population have reproductive tract infection *** and non-usage of condom increase the risk of reproductive tract *** hygiene and condom usage are the significant interventions,which may reduce the prevalence of these symptoms.

关键词： Reproductive tract infection Sexually transmitted infection Migrants Factory workers Prevalence

sp^(2)碳用于3D打印技术综述:材料、性能和应用

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新型炭材料（中英文） 2022年第6期37卷 1046-1065页

作者： Satendra Kumar Manoj goswami Netrapal Singh Sathish Natarajan Surender Kumar Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India CSIR-Advanced Materials and Processes Research Institute(AMPRI) Bhopal 462026India

3D打印可以改变现有的生产方法,是第四次工程革命中的一项现代技术。它从成型原理上提出了分层制造、逐层叠加成型的新颖生产方法,从根本上简化了制造工艺,实现了大规模定制生产。然而,这一新技术仍存在许多问题。除了纯石墨烯外,sp^(2... 详细信息

3D打印可以改变现有的生产方法,是第四次工程革命中的一项现代技术。它从成型原理上提出了分层制造、逐层叠加成型的新颖生产方法,从根本上简化了制造工艺,实现了大规模定制生产。然而,这一新技术仍存在许多问题。除了纯石墨烯外,sp^(2)碳具有好的亲水性,3D打印难度较小。sp^(2)碳还可在3D打印中的各种阶段应用。纯石墨烯的疏水性使其难以在水系介质中打印和加工。毛细管油墨的发展使得纯石墨烯的3D打印成为可能。本文综述了sp^(2)碳的3D打印技术的最新进展。首先简要概述了3D打印技术,随后概述了sp^(2)碳的3D打印及其在各种方面的应用。最后,讨论了这一新领域的发展前景和机遇。

关键词： 3D打印技术 sp^(2)碳碳基复合材料应用

Cosmological parameters for spatially flat dust filled Universe in Brans-Dicke theory

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Research in Astronomy and Astrophysics 2017年第3期17卷 55-66页

作者： Gopi Kant goswami Department of Mathematics Kalyan E G.CollegeBhilai-490 006C.G.India

We have investigated late time acceleration for a spatially fiat dust filled Universe in Brans- Dicke theory in the presence of a positive cosmological constant A. Expressions for Hubble＇s constant, luminosity distance and apparent magnitude have been obtained for our model. The theoretical results are compared with observed values of the latest 287 high redshift （0.3 ≤ z ≤1.4） Type Ia supernova data taken from the Union 2.1 compilation to estimate present values of matter and dark energy parame- ters, （Ωm）0 and （ΩA）0. We have also estimated the present value of Hubble＇s constant H0 in light of an updated sample of Hubble parameter measurements including 19 independent data points. The results are found to be in good agreement with recent astrophysical observations. We also calculated various physical parameters such as matter and dark energy densities, present age of the Universe and decelera- tion parameter. The value for Brans-Dicke-coupling constant ω is set to be 40 000 based on accuracy of solar system tests and recent experimental evidence.

关键词： cosmology osmological parameters - cosmology observations- dark energy-Brans-Dicke theory

Plant growth-promoting rhizobacteria--alleviators of abiotic stresses in soil: A review

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Pedosphere 2020年第1期30卷 40-61页

作者： Madhurankhi goswami Suresh DEKA Environmental Biotechnology Laboratory Resource Management and Environment SectionLife Sciences DivisionInstitute of Advanced Study in Science and Technology(IASST)Guwahati Assam 781035(India)

With the continuous increase in human population,there is widespread usage of chemical fertilizers that are responsible for introducing abiotic stresses in agricultural crop *** stresses are major constraints for crop yield and global food security and therefore require an immediate *** implementation of plant growth-promoting rhizobacteria(PGPR)into the agricultural production system can be a profitable alternative because of its efficiency in plant growth regulation and abiotic stress *** bacteria have the potential to promote plant growth and to aid in the management of plant diseases and abiotic stresses in the soil through production of bacterial phytohormones and associated metabolites as well as through significant root morphological *** changes result in improved plant-water relations and nutritional status in plants and stimulate plants’defensive mechanisms to overcome unfavorable environmental ***,we describe the significance of plant-microbe interactions,highlighting the role of PGPR,bacterial phytohormones,and bacterial metabolites in relieving abiotic environmental stress in *** research is necessary to gather in-depth knowledge on PGPR-associated mechanisms and plant-microbe interactions in order to pave a way for field-scale application of beneficial rhizobacteria,with the aim of building a healthy and sustainable agricultural ***,this review aims to emphasize the role of PGPR in growth promotion and management of abiotic soil stress with the goal of developing an eco-friendly and cost-effective strategy for future agricultural sustainability.

关键词： phytohormones plant-microbe interaction root colonization root morphological change secondary metabolites stress alleviation stress tolerance

Preparation of rice fermented food using root of Asparagus racemosus as herbal starter and assessment of its nutrient profle

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Systems Microbiology and Biomanufacturing 2022年第1期2卷 147-156页

作者： Papan Kumar Hor Debabrata goswami Kuntal Ghosh Miklós Takó Suman Kumar Halder Keshab Chandra Mondal Department of Microbiology Vidyasagar UniversityMidnaporeWest Bengal 721102India Department of Biological Sciences Midnapore City CollegeMidnaporeIndia Department of Microbiology Faculty of Science and InformaticsUniversity of SzegedSzegedHungary

The popularity of traditional fermented food products is based on their *** addition of a starter brings consistent,desirable,and predictable food changes with improved nutritive,functional,and sensory *** addition of a mixture of plant residues as a starter or source of microbes is an age-old practice to prepare traditional fermented food and beverages,and most of the reported data on traditional foods were based on the analysis of the fnal *** contribution of an individual starter component(plant residue)is not experimentally substantiated for any traditional fermented food,but this data are very essential for the formulation of an efective *** this study,Asparagus racemosus,which used as a common ingredient of starter for preparation of rice fermented food in the Indian sub-continent,was used as a starter for the preparation of rice fermented food under laboratory scale,and its microbial and nutrient profle was *** fermented product was a good source of lactic acid bacteria,Bifdobacterium sp.,yeast,*** food product was acidic and enriched with lactic acid and acetic acid with titratable acidity of 0.65%.The content of protein,fat,minerals,and vitamins(water-soluble)was considerably *** notably,oligosaccharide(G3-matotriose),unsaturated fatty acids(ω3,ω6,ω7,andω9),and a pool of essential and non-essential amino acids were enriched in the newly formulated ***,the herbal starter-based rice fermented food would provide important macro-and *** could also deliver large numbers of active microorganisms for the sustainability of ***,the selected plant part conferred its suitability as an efective starter for the preparation of healthier rice-based food products.

关键词： Food fermentation Starter Asparagus racemosus LAB Bifdobacterium spp. Macro-and micronutrients

Phosphorene: Current status, challenges and opportunities

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Frontiers of Chemical Science and Engineering 2019年第2期13卷 296-309页

作者： anandarup goswami Manoj B.Gawande Division of Chemistry Department of Sciences and HumanitiesVignan's Foundation for ScienceTechnology and Research (VFSTR)VadlamudiGuntur-522213Andhra PradeshIndia Regional Centre of Advanced Technologies and Materials Department of Physical ChemistryFaculty of SciencePalacky University OlomoucSlechtitelu 27783 71 OlomoucCzech Republic

The field of 2-dimensional (2D) materials has witnessed a sharp growth since its inception and can majorly be attributed to the substantial technical and scientific developments, leading to significant improvements in their syntheses, characterization and applications. In the list of 2D materials, the relatively newer addition is phosphorene, which ideally consists of a single layer of black phosphorous. Keeping in mind the past, and ongoing research activities, this short account offers a brief overview of the present status and the associated challenges in the field of phosphorene-related research, with special emphasis on their syntheses, properties, applications and future opportunities.

关键词： phosphorene black phosphorous anisotropy single layer thermoelectric chemical vapor deposition catalysis battery supercapacitor

ANALYSIS OF DISCRETE-TIME QUEUES WITH BATCH RENEWAL INPUT AND MULTIPLE VACATIONS

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Journal of Systems Science & Complexity 2012年第3期25卷 486-503页

作者： Veena goswami G.B.MUND School of Computer Application KIIT University School of Computer Engineering KIIT University

这份报纸分析一有批的内部到达的时间是的批更新在输入的有限缓冲区的排队系统任意地散布了的分离时间的多重假期。服务和假期时间互相独立、几何上分布式。当系统没在一个服务结束时代或一个假期结束时代有任何等待的工作时，服务者度... 详细信息

这份报纸分析一有批的内部到达的时间是的批更新在输入的有限缓冲区的排队系统任意地散布了的分离时间的多重假期。服务和假期时间互相独立、几何上分布式。当系统没在一个服务结束时代或一个假期结束时代有任何等待的工作时，服务者度假。系统近来在假设下面被分析有推迟的存取的到达系统和早到达系统。用增补变量和嵌入的 Markov 链技术，作者在到达前获得队列长度分布，为部分批的拒绝的任意、外面的观察员观察时代政策。堵住的概率第一 -- ， arbitraryand 在批的持续工作被讨论了。在槽测量的实际等待时间分布的分析第一 -- ，一任意 -- 并且在接受的批的持续工作，和另外的表演与一些数字结果一起测量也被调查了。

关键词：离散时间队列分析休假输入嵌入马尔可夫链排队系统有限缓冲区服务器

ANALYSIS OF A DISCRETE-TIME GI/GEO/1/N QUEUE WITH MULTIPLE WORKING VACATIONS

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Journal of Systems Science and Systems Engineering 2010年第3期19卷 367-384页

作者： Veena goswami G.B.MUND School of Computer Application KIIT University School of Computer Engineering KIIT University

This paper analyzes a finite-buffer renewal input single server discrete-time queueing system with multiple working vacations. The server works at a different rate rather than completely stopping working during the multiple working vacations. The service times during a service period, service time during a vacation period and vacation times are geometrically distributed. The queue is analyzed using the supplementary variable and the imbedded Markov-chain techniques. We obtain steady-state system length distributions at pre-arrival, arbitrary and outside observer＇s observation epochs. The analysis of actual waiting-time distribution and some performance measures are carried out. We present some numerical results and discuss special cases of the model.

关键词： Discrete-time finite-buffer working vacations supplementary variable waiting-time