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Rapid bacteria identification using structured illumination microscopy and machine learning

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Journal of Innovative Optical Health Sciences 2018年第1期11卷 149-158页

作者： Yingchuan He Weize Xu Yao Zhi rohit Tyagi Zhe Hu Gang Cao College of Engineering Huazhong Agricultural University Wuhan 430070 P.R.China College of Veterinary Medicine Huazhong Agricultural University Wuhan 430070 P.R.China State Key Laboratory of Agricultural Microbiology Huazhong Agricultural University Wuhan 430070 P.R.China Bio-Medical Center Huazhong Agricultural University Wuhan 430070 P.R.China Key Laboratory of Development of Veterinary Diagnostic Products Ministry of Agriculture College of Veterinary Medicine Huazhong Agricultural University Wuhan 430070P.R.China

Traditionally,optical microscopy is used to visualize the morphological features of pathogenic bacteria,of which the features are further used for the detection and ident ification of the ***,due to the resolution limitation of conventional optical microscopy as well as the lack of standard pattern library for bacteria identification,the ffectiveness of this optical microscopy-based method is ***,we reported a pilot study on a combined use of Structured Illumination Microscopy(SIM)with machine learning for rapid bacteria *** applying machine learning to the SIM image datasets from three model bacteria(including Escherichia coli,Mycobacterium smegmatis,and Pseudomonas aeruginosa),we obtained a classifcation accuracy of up to 98%.This study points out a promising possibility for rapid bacterial identification by morphological features.

关键词： Structured ilumination microscopy bacterial classification principal component analysis support vector machine random forest

Solving the electronic structure problem with machine learning

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npj Computational Materials 2019年第1期5卷 959-965页

作者： Anand Chandrasekaran Deepak Kamal rohit Batra Chiho Kim Lihua Chen Rampi Ramprasad School of Materials Science and Engineering Georgia Institute of Technology771 Ferst Dr.NWAtlantaGA 30332USA

Simulations based on solving the Kohn-Sham(KS)equation of density functional theory(DFT)have become a vital component of modern materials and chemical sciences research and development *** its versatility,routine DFT calculations are usually limited to a few hundred atoms due to the computational bottleneck posed by the KS *** we introduce a machine-learning-based scheme to efficiently assimilate the function of the KS equation,and by-pass it to directly,rapidly,and accurately predict the electronic structure of a material or a molecule,given just its atomic configuration.A new rotationally invariant representation is utilized to map the atomic environment around a grid-point to the electron density and local density of states at that *** mapping is learned using a neural network trained on previously generated reference DFT results at millions of *** proposed paradigm allows for the high-fidelity emulation of KS DFT,but orders of magnitude faster than the direct ***,the machine learning prediction scheme is strictly linear-scaling with system size.

关键词： solution. equation. structure

Stabilising Cobalt Sulphide Nanocapsules with Nitrogen-Doped Carbon for High-Performance Sodium-Ion Storage

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Nano-Micro Letters 2020年第4期12卷 29-40页

作者： Yilan Wu rohit RGaddam Chao Zhang Hao Lu Chao Wang Dmitri Golberg Xiu Song Zhao School of Chemical Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyBrisbaneQLD 4001Australia Institute of Materials for Energy and Environment College of Materials Science and EngineeringQingdao University308 Ningxia RoadQingdao 266071People’s Republic of China

Conversion-type anode materials with a high charge storage capability generally su er from large volume expansion, poor electron conductivity, and sluggish metal ion transport kinetics. The electrode material described in this paper, namely cobalt sulphide nanoparticles encapsulated in carbon cages(Co9S8@NC), can circumvent these problems. This electrode material exhibited a reversible sodium-ion storage capacity of 705 mAh g^-1 at 100 mA g^-1 with an extraordinary rate capability and good cycling stability. Mechanistic study using the in situ transmission electron microscope technique revealed that the volumetric expansion of the Co9S8 nanoparticles is bu ered by the carbon cages, enabling a stable electrode–electrolyte interface. In addition, the carbon shell with high-content doped nitrogen significantly enhances the electron conductivity of the Co9S8@NC electrode material and provides doping-induced active sites to accommodate sodium ions. By integrating the Co9S8@NC as negative electrode with a cellulose-derived porous hard carbon/graphene oxide composite as positive electrode and 1 M NaPF6 in diglyme as the electrolyte, the sodium-ion capacitor full cell can achieve energy densities of 101.4 and 45.8 Wh kg^-1 at power densities of 200 and 10,000 W kg^-1, respectively.

关键词： Cobalt sulphide Nitrogen-doped carbon Core–shell structure Sodium-ion capacitors

Real-Time Multimodal Biometric Authentication of Human Using Face Feature Analysis

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Computers, Materials & Continua 2021年第10期69卷 1-19页

作者： rohit Srivastava Ravi Tomar Ashutosh Sharma Gaurav Dhiman Naveen Chilamkurti Byung-Gyu Kim University of Petroleum and Energy Studies DehradunIndia Lovely Professional University India Government Bikram College of Commerce Patiala147001PunjabIndia La Trobe University MelbourneAustralia Sookmyung Women’s University Seoul04310Korea

As multimedia data sharing increases,data security in mobile devices and its mechanism can be seen as *** combines the physiological and behavioral qualities of an individual to validate their character in *** incorporate physiological attributes like a fingerprint,face,iris,palm print,finger knuckle print,Deoxyribonucleic Acid(DNA),and behavioral qualities like walk,voice,mark,or *** main goal of this paper is to design a robust framework for automatic face *** Invariant Feature Transform(SIFT)and Speeded-up Robust Features(SURF)are employed for face ***,we propose a modified Gabor Wavelet Transform for SIFT/SURF(GWT-SIFT/GWT-SURF)to increase the recognition accuracy of human *** proposed scheme is composed of three ***,the entropy of the image is removed using Discrete Wavelet Transform(DWT).Second,the computational complexity of the SIFT/SURF is ***,the accuracy is increased for authentication by the proposed GWT-SIFT/GWT-SURF algorithm.A comparative analysis of the proposed scheme is done on real-time Olivetti Research Laboratory(ORL)and Poznan University of Technology(PUT)*** compared to the traditional SIFT/SURF methods,we verify that the GWT-SIFT achieves the better accuracy of 99.32%and the better approach is the GWT-SURF as the run time of the GWT-SURF for 100 images is 3.4 seconds when compared to the GWT-SIFT which has a run time of 4.9 seconds for 100 images.

关键词： Biometrics real-time multimodal biometrics real-time face recognition feature analysis

Modulated orientation-sensitive terahertz spectroscopy

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Photonics Research 2016年第3期4卷 1-8页

作者： rohit Singh Deepu Koshy George Chejin Bae K.A.Niessen A.G.Markelz Department of Physics and Astronomy Depauw University Department of Physics Virginia Tech Department of Electrical Engineering University at Buffalo Department of Physics University at Buffalo

Intramolecular vibrations of large macromolecules reside in the terahertz range. In particular, protein vibrations are closely spaced in frequency, resulting in a nearly continuous vibrational density of states. This density of vibrations interferes with the identification of specific absorption lines and their subsequent association with specific functional motions. This challenge is compounded with the absorption being dominated by the solvent and local relaxational motions. A strategy for removing the isotropic relaxational loss and isolating specific vibrations is to use aligned samples and polarization-sensitive measurements. Here, we demonstrate a technique to rapidly attain the anisotropic resonant absorbance using terahertz time domain spectroscopy and a spinning sample. The technique, modulated orientation-sensitive terahertz spectroscopy(MOSTS), has a nonzero signal only for anisotropic samples, as demonstrated by a comparison between a silicon wafer and a wire grid polarizer. For sucrose and oxalic acid molecular crystals, the MOSTS response is in agreement with modeled results for the intermolecular vibrations. Further, we demonstrate that, even in the presence of a large relaxational background, MOSTS isolates underlying vibrational resonances.

关键词： THz Modulated orientation-sensitive terahertz spectroscopy

A universal strategy for the creation of machine learning-based atomistic force fields

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npj Computational Materials 2017年第1期3卷 146-153页

作者： Tran Doan Huan rohit Batra James Chapman Sridevi Krishnan Lihua Chen Rampi Ramprasad Department of Materials Science&Engineering and Institute of Materials Science University of Connecticut97 North Eagleville Rd.Unit 3136StorrsCT 06269-3136USA

Emerging machine learning(ML)-based approaches provide powerful and novel tools to study a variety of physical and chemical *** this contribution,we outline a universal strategy to create ML-based atomistic force fields,which can be used to perform high-fidelity molecular dynamics *** scheme involves(1)preparing a big reference dataset of atomic environments and forces with sufficiently low noise,e.g.,using density functional theory or higher-level methods,(2)utilizing a generalizable class of structural fingerprints for representing atomic environments,(3)optimally selecting diverse and nonredundant training datasets from the reference data,and(4)proposing various learning approaches to predict atomic forces directly(and rapidly)from atomic *** the atomistic forces,accurate potential energies can then be obtained by appropriate integration along a reaction coordinate or along a molecular dynamics *** on this strategy,we have created model ML force fields for six elemental bulk solids,including Al,Cu,Ti,W,Si,and C,and show that all of them can reach chemical *** proposed procedure is general and universal,in that it can potentially be used to generate ML force fields for any material using the same unified workflow with little human ***,the force fields can be systematically improved by adding new training data progressively to represent atomic environments not encountered previously.

关键词： utilizing preparing selecting

Duodenal heterotopic pancreatic tissue:a case report and literature review

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Gastroenterology Report 2015年第3期3卷 262-265页

作者： rohit Mehra Aswini K.Pujahari Shyam S.Jaiswal Department of Surgery Armed Forces Medical CollegeWanowrieIndia

Heterotopic pancreas is an aberration in the developmental profile of the *** entity is rarely symptomatic and its malignant transformation is even ***,when present,it poses a diagnostic dilemma to clinicians,as little help comes from gastroenteroscopy and *** exploration remains the only option at times,and it is the histopathological examination that finally clears the *** case report reveals the elusive nature of malignancy in heterotopic pancreas in the duodenum.

关键词： heterotopic pancreas malignant transformation small bowel obstruction

Resilience deficit index for quantification of resilience

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Resilient Cities and Structures 2022年第2期1卷 1-9页

作者： rohit Ranjan Singh Michel Bruneau Andreas Stavridis Kallol Sett Department of Civil Structural and Environmental EngineeringUniversity at BuffaloBuffaloNY 14260United States

After a brief overview of how the dimensionless resilience index has been calculated in the past for buildings,and some of the shortcomings of that approach,the use of a resilience deficit index is advocated to overcome some of these *** example is provided and the pros and cons of each approach are discussed,with broad recommendations applicable to the quantification of building resilience.

关键词： Resilience Buildings Deficit Functionality Occupancy

Chromophobe renal cell carcinoma: Novel molecular insights and clinicopathologic updates

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Asian Journal of Urology 2022年第1期9卷 1-11页

作者： Reza Alaghehbandan G.Przybycin Christopher Virginie Verkarre rohit Mehra Department of Pathology Faculty of MedicineUniversity of British ColumbiaRoyal Columbian HospitalVancouverBCCanada Robert J Tomsich Pathology and Laboratory Medicine Institute Cleveland ClinicClevelandOHUSA Department of Pathology Georges Pompidou European HospitalAP-HPParis UniversityINSERM UMR 970PARCCParisFrance Department of Pathology University of Michigan Medical SchoolAnn ArborMIUSA Michigan Center for Translational Pathology Ann ArborMIUSA Rogel Cancer Center Michigan MedicineAnn ArborMIUSA

Chromophobe renal cell carcinoma(ChRCC)is the third most common renal cell carcinoma(RCC)subtype,which predominantly occurs in sporadic *** are considered to originate from the intercalated cell of distal tubules with two main morphological variants,classic and *** ChRCCs carry a favorable clinical *** alone is limited in predicting the behavior of ChRCCs that do not have overtly aggressive morphologic findings such as necrosis and sarcomatoid *** with positive CD117 expression,classic ChRCCs generally express diffuse and uniform CK7,while eosinophilic variant demonstrates more heterogeneous CK7 expression(rare or patchy).Multiple losses of chromosomes 1,2,6,10,13,17,and 21 are considered to be the genetic hallmarks of classic and eosinophilic ChRCCs,while chromosomal gains are known to be associated with sarcomatoid ***53 and PTEN are the two most frequently mutated genes in *** major challenge in the differential diagnosis of ChRCCs includes considerations around the eosinophilic variant(of ChRCCs),where it may share overlapping features with oncocytoma or other recent emergent oncocytic *** eosinophilic ChRCCs share expression of the recently described biomarkers,LINC01187 and FOXI1,with classic ChRCCs,however,a subset of eosinophilic-like ChRCCs with lower biomarker expression have been demonstrated to harbor MTOR gene ***,the morphologic features of ChRCCs and genetic profile with combinations of chromosomal losses and gains suggest this tumor entity to represent a distinct,yet heterogeneous group of renal neoplasms.

关键词： Renal cell carcinoma Chromophobe Immunohisto-chemistry RNA in situ hybridization Next-generation sequencing Oncocytic tumors Molecular