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An Imbalanced Dataset and Class Overlapping Classification Model for Big Data

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Computer Systems Science & Engineering 2023年第2期44卷 1009-1024页

作者： Mini Prince P.M.Joe prathap Department of Information Technology St.Peter’s College of Engineering and TechnologyChennai600054TamilnaduIndia Department of Information Technology R.M.D Engineering CollegeChennai601206TamilnaduIndia

Most modern technologies,such as social media,smart cities,and the internet of things(IoT),rely on big data.When big data is used in the real-world applications,two data challenges such as class overlap and class imbalance arises.When dealing with large datasets,most traditional classiﬁers are stuck in the local optimum problem.As a result,it’s necessary to look into new methods for dealing with large data collections.Several solutions have been proposed for overcoming this issue.The rapid growth of the available data threatens to limit the usefulness of many traditional methods.Methods such as oversampling and undersampling have shown great promises in addressing the issues of class imbalance.Among all of these techniques,Synthetic Minority Oversampling TechniquE(SMOTE)has produced the best results by generating synthetic samples for the minority class in creating a balanced dataset.The issue is that their practical applicability is restricted to problems involving tens of thousands or lower instances of each.In this paper,we have proposed a parallel mode method using SMOTE and MapReduce strategy,this distributes the operation of the algorithm among a group of computational nodes for addressing the aforementioned problem.Our proposed solution has been divided into three stages.Theﬁrst stage involves the process of splitting the data into different blocks using a mapping function,followed by a pre-processing step for each mapping block that employs a hybrid SMOTE algo-rithm for solving the class imbalanced problem.On each map block,a decision tree model would be constructed.Finally,the decision tree blocks would be com-bined for creating a classiﬁcation model.We have used numerous datasets with up to 4 million instances in our experiments for testing the proposed scheme’s cap-abilities.As a result,the Hybrid SMOTE appears to have good scalability within the framework proposed,and it also cuts down the processing time.

关键词： Imbalanced dataset class overlapping SMOTE MapReduce parallel programming oversampling

Secured Access Policy in Ciphertext-Policy Attribute-Based Encryption for Cloud Environment

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Computer Systems Science & Engineering 2023年第7期46卷 1079-1092页

作者： P.prathap Nayudu Krovi Raja Sekhar Department of Computer Science and Engineering Koneru Lakshmaiah Education Foundation VaddeswaramAPIndia

The cloud allows clients to store and share data.Depending on the user’s needs,it is imperative to design an effective access control plan to share the information only with approved users.The user loses control of their data when the data is outsourced to the cloud.Therefore,access control mechanisms will become a significant challenging problem.The Ciphertext-Policy Attribute-Based Encryption(CP-ABE)is an essential solution in which the user can control data access.CP-ABE encrypts the data under a limited access policy after the user sets some access policies.The user can decrypt the data if they satisfy the limited access policy.Although CP-ABE is an effective access control program,the privacy of the policy might be compromised by the attackers.Namely,the attackers can gather important information from plain text policy.To address this issue,the SHA-512 algorithm is presented to create a hash code for the user’s attributes in this paper.Depending on the created hash codes,an access policy will be formed.It leads to protecting the access policy against attacks.The effectiveness of the proposed scheme is assessed based on decryption time,private key generation time,ciphertext generation time,and data verification time.

关键词： Cloud computing access policy CP-ABE hash code SHA-512 attribute ciphertext encryption decryption

A Novel Approach to Design Distribution Preserving Framework for Big Data

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Intelligent Automation & Soft Computing 2023年第3期35卷 2789-2803页

In several fields like financial dealing,industry,business,medicine,et cetera,Big Data(BD)has been utilized extensively,which is nothing but a collection of a huge amount of data.However,it is highly complicated along with time-consuming to process a massive amount of data.Thus,to design the Distribution Preserving Framework for BD,a novel methodology has been proposed utilizing Manhattan Distance(MD)-centered Partition Around Medoid(MD–PAM)along with Conjugate Gradient Artificial Neural Network(CG-ANN),which undergoes various steps to reduce the complications of BD.Firstly,the data are processed in the pre-processing phase by mitigating the data repetition utilizing the map-reduce function;subsequently,the missing data are handled by substituting or by ignoring the missed values.After that,the data are transmuted into a normalized form.Next,to enhance the classification performance,the data’s dimensionalities are minimized by employing Gaussian Kernel(GK)-Fisher Discriminant Analysis(GK-FDA).Afterwards,the processed data is submitted to the partitioning phase after transmuting it into a structured format.In the partition phase,by utilizing the MD-PAM,the data are partitioned along with grouped into a cluster.Lastly,by employing CG-ANN,the data are classified in the classification phase so that the needed data can be effortlessly retrieved by the user.To analogize the outcomes of the CG-ANN with the prevailing methodologies,the NSL-KDD openly accessible datasets are utilized.The experiential outcomes displayed that an efficient result along with a reduced computation cost was shown by the proposed CG-ANN.The proposed work outperforms well in terms of accuracy,sensitivity and specificity than the existing systems.

关键词： Big data artiﬁcial neural network ﬁsher discriminant analysis distribution preserving framework manhattan distance

Dynamic Time and Location Information in Ciphertext-Policy Attribute-Based Encryption with Multi-Authorization

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Intelligent Automation & Soft Computing 2023年第3期35卷 3801-3813页

作者： P.prathap Nayudu Krovi Raja Sekhar Department of Computer Science and Engineering Koneru Lakshmaiah Education FoundationVaddeswaramAP522502India

Due to the mobility of users in an organization,inclusion of dynamic attributes such as time and location becomes the major challenge in Ciphertext-Policy Attribute-Based Encryption(CP-ABE).By considering this challenge;we focus to present dynamic time and location information in CP-ABE with mul-ti-authorization.Atﬁrst,along with the set of attributes of the users,their corre-sponding location is also embedded.Geohash is used to encode the latitude and longitude of the user’s position.Then,decrypt time period and access time period of users are deﬁned using the new time tree(NTT)structure.The NTT sets the encrypted duration of the encrypted data and the valid access time of the private key on the data user’s private key.Besides,single authorization of attribute authority(AA)is extended as multi authorization for enhancing the effectiveness of key generation.Simulation results depict that the proposed CP-ABE achieves better encryption time,decryption time,security level and memory usage.Namely,encryption time and decryption time of the proposed CP-ABE are reduced to 19%and 16%than that of existing CP-ABE scheme.

关键词： CP-ABE geohash new time tree(NTT) multi authorization dynamic attribute

Phosphorus Starvation Tolerance in Rice Through Combined Physiological,Biochemical,and Proteome Analyses

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Rice science 2023年第6期30卷 613-631页

作者： prathap V Suresh KUMAR Nand Lal MEENA Chirag MAHESHWARI Monika DALAL Aruna TYAGI Division of Biochemistry Indian Council of Agricultural Research-Indian Agricultural Research InstituteNew Delhi 110012India Division of Germplasm Evaluation National Bureau of Plant Genetic ResourcesNew Delhi 110012India National Institute for Plant Biotechnology New Delhi 110012India

Phosphorus(P) deficiency limits the growth,development,and productivity of rice.To better understand the underlying mechanisms in P-deficiency tolerance and the role of Pup1 QTL in enhancing P use efficiency(PUE) for the development of P-efficient rice cultivars,a pair of contrasting rice genotypes(Pusa-44 and NIL-23) was applied to investigate the morpho-physio-biochemical and proteomic variation under P-starvation stress.The rice genotypes were grown hydroponically in a PusaRich medium with adequate P(16 mg/kg,+P) or without P(0 mg/kg,-P) for 30 d.P-starvation manifested a significant reductions in root and shoot biomass,shoot length,leaf area,total chlorophyll,and P,nitrogen and starch contents,as well as protein kinase activity.The stress increased root-to-shoot biomass ratio,root length,sucrose content,and acid phosphatase activity,particularly in the P-tolerant genotype(NIL-23).Comparative proteome analysis revealed several P metabolism-associated proteins(including OsCDPKs,OsMAPKs,OsCPKs,OsLecRK2,and OsSAPks) to be expressed in the shoot of NIL-23,indicating that multiple protein kinases were involved in P-starvation/deficiency tolerance.Moreover,the up-regulated expression of OsrbcL,OsABCG32,OsSUS5,OsPoll-like B,and ClpC2 proteins in the shoot,and OsACA9,OsACA8,OsSPS2F,OsPP2C15,and OsBiP3 in the root of NIL-23,indicated their role in P-starvation stress control through the Pup1 QTL. Thus,our findings indicated that-P stress-responsive proteins,in conjunction with morpho-physio-biochemical modulations,improved PUE and made NIL-23 a P-deficiency tolerant genotype due to the introgression of the Pup1 QTL in the Pusa-44 background.

关键词： phosphorus deficiency Pup1 QTL protein kinase acid phosphatase proteome analysis rice

Mixed convection flow in vertical channel with boundary conditions of third kind in presence of heat source/sink

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Applied Mathematics and Mechanics(English Edition) 2012年第8期33卷 1015-1034页

作者： J.C.UMAVATHI J.prathap KUMAR JAWERIYA SULTANA Department of Mathematics Gulbarga UniversityGulbarga 585106KarnatakaIndia

The effects of viscous dissipation and heat source/sink on fully developed mixed convection for the laminar flow in a parallel-plate vertical channel are investigated. The plate exchanges heat with an external fluid. Both conditions of equal and different reference temperatures of the external fluid are considered. First, the simple cases of the negligible Brinkman number or the negligible Grashof number are solved analytically. Then, the combined effects of buoyancy forces and viscous dissipation in the presence of heat source/sink are analyzed by a perturbation series method valid for small values of the perturbation parameter. To relax the conditions on the perturbation parameter, the velocity and temperature fields are solved by using the Runge-Kutta fourth-order method with the shooting technique. The velocity, temperature, skin friction, and Nusselt num- bers at the plates are discussed numerically and presented through graphs.

关键词： mixed convection viscous fluid perturbation method Runge-Kuttashooting method heat source/sink

A new insight into electrochemical detection of eugenol by hierarchical sheaf-like mesoporous NiCo2O4

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Nano Research 2015年第8期8卷 2636-2645页

作者： Mylamparambil Udayan Anu prathap Chao Wei Shengnan Sun Zhichuan J. Xu School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

NiCo 2 有像捆的 nanostructure 形态学的 O 4 nanosheets 被热水的反应由退火跟随了的一出灵巧的一步舞综合了处理。给人深刻印象地， NiCo 2 O 4 nanosheets 展览 eugenol 的快速的察觉。察觉的线性范围从 1500 M，并且察觉的限制是 5... 详细信息

NiCo 2 有像捆的 nanostructure 形态学的 O 4 nanosheets 被热水的反应由退火跟随了的一出灵巧的一步舞综合了处理。给人深刻印象地， NiCo 2 O 4 nanosheets 展览 eugenol 的快速的察觉。察觉的线性范围从 1500 M，并且察觉的限制是 5.4 下午。NiCo 2 O 4 修改了电极表明的高敏感，好重覆性和重制度，和长期的稳定性(在在 30 天的反应的 7% 减少) 。把工作基于这，为 eugenol 氧化的电气化学的反应机制被建议，并且另外， NiCo 2 O 4 修改了电极成功地在药的香油样品为 eugenol 的分析被采用。为在药的香油样品的 eugenol 的恢复价值在范围 98.7%105.5% 。

关键词：电化学检测丁香酚涂层层状电化学反应机理介孔水热合成反应修饰电极

Role of cellular reprogramming and epigenetic dysregulation in acquired chemoresistance in breast cancer

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Cancer Drug Resistance 2019年第2期2卷 297-312页

作者： Logeswari Ponnusamy prathap Kumar S.Mahalingaiah Yu-Wei Chang Kamaleshwar P.Singh Department of Environmental Toxicology The Institute of Environmental and Human Health(TIEHH)Texas Tech UniversityLubbockTexas 79409USA Metabolism and Safety ZoetisKalamazooMichigan 49007USA Preclinical Safety AbbVieNorth ChicagoIllinois 60085USA

Acquired resistance to chemotherapy is a major limitation in clinical treatment for breast cancer.Accumulating evidence from in vitro,in vivo and clinical studies suggest that acquired chemoresistance is progressive,multifactorial and involve genetic and epigenetic aberrations.Among various mechanisms that contribute to chemoresistance,cellular reprogramming has extensively been implicated in breast cancer resistance lately.Cellular reprogramming events such as acquisition of epithelial to mesenchymal transition(EMT)and cancer stemness(CSCs)not only provide cancer cells with reversible phenotypic plasticity and survival advantage against cytotoxicity but also leads to aggressiveness,metastasis,clinical resistance,tumor recurrence and poor survival.The transient and reversible nature of cellular reprogramming processes and their controlled interaction with epigenetic regulatory complexes strongly support the involvement of dynamic epigenetic regulatory network in governing the cellular reprogramming and associated acquired chemoresistance.Further,epigenetic modulations are also gaining interest as promising interventions addressing the cancer cell reprogramming machinery to overcome acquired chemoresistance.This review discusses the previous reports and our recent findings that lead to current understanding of epigenetic dysregulation dictating the cellular reprogramming processes such as acquisition of EMT and CSCs phenotype and how they co-ordinate to establish acquired drug resistance in breast cancer.

关键词： Chemoresistance cellular reprogramming DNA methylation histone modifications breast cancer epithelial to mesenchymal transition cancer stem cell

Unsteady flow and heat transfer of porous media sandwiched between viscous fluids

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Applied Mathematics and Mechanics(English Edition) 2010年第12期31卷 1497-1516页

作者： J. C. UMAVATHI I. C. LIU J. prathap-KUMAR D. SHAIK-MEERA Department of Mathematics Gulbarga University Gulbarga 585106 Karnaktaka India Department of Civil Engineering National Chi Nan University University Road Puli Nantou Hsien 54561 Taiwan China

The problem of unsteady oscillatory flow and heat transfer of porous medin sandwiched between viscous fluids has been considered through a horizontal channel with isothermal wall temperatures. The flow in the porous medium is modeled using the Brinkman equation. The governing partial differential equations are transformed to ordinary differential equations by collecting the non-periodic and periodic terms. Closed-form solutions for each region are found after applying the boundary and interface conditions. The influence of physical parameters, such as the porous parameter, the frequency parameter, the periodic frequency parameter, the viscosity ratios, the conductivity ratios, and the Prandtl number, on the velocity and temperature fields is computed numerically and presented graphically. In addition, the numerical values of the Nusselt number at the top and bottom walls are derived and tabulated.

关键词： unsteady porous medium immiscible fluid horizontal channel analyticalsolution