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Multilocular thymic cysts-a diagnostic challenge on computed tomography

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World Journal of Clinical Cases 2025年第3期13卷 61-65页

作者： Nirmal kumar reddy Onteddu Naga Sai Rasagna Mareddy Sai Swarupa R Vulasala Jayabharath Onteddu Mayur Virarkar Department of Internal Medicine University of Florida College of MedicineJacksonvilleFL 32209United States Department of Diagnostic Radiology University of AlabamaBirminghamAL 35294United States Department of Diagnostic Radiology University of Florida College of MedicineJacksonvilleFL 32209United States Department of Public Health Sciences University of FloridaGainesvilleFL 32611United States

A recent case report provided a patient scenario,wherein,a 39-year-old male patient presented with occasional palpitations,headache,and *** of tumor markers did not show any abnormal ***,a computed tomography(CT)scan was undertaken,and its findings were affirmative of thymic ***,the postoperative histopathological assessment of the mass,after its resection,confirmed it as an anterior mediastinal multilocular thymic cyst(MTC),with concurrent acute upper respiratory tract infection and acute ***,this case report advocates the need for a preoperative histopathological examination with CT imaging to minimize the risk of confusing an MTC with a malignant thymic tumor.

关键词： Imaging findings Multilocular thymic cyst Histopathology Thymic cancer Mediastinal mass

Fluid Inclusion Characteristics of Tungsten Mineralization in the Agargaon Area of Sakoli Fold Belt, Central India

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Journal of Earth Science 2020年第3期31卷 559-570页

作者： girish kumar Mayachar Subhasish Ghosh National Centre for Excellence in Geoscience Research Remote Sensing and Aerial SurveyGeological Survey of IndiaBangalore 560078India

The Lower to Middle Proterozoic Sakoli fold belt in Central India forms a triangular belt with significant mineralization of strategic *** Sakoli fold belt comprises metasediments,felsic and mafic volcanics with metabasalts bounded by the gneissic-migmatitic *** last pulses of granitic activity in the form of quartz lenses intrude the metasediments and are associated with tungsten *** metasediments are intruded by the quartz veins and tourmaline breccias trending 60°N to 65°E and 60°S to 65°W and are parallel to the regional structural *** tungsten mineralization in this area is restricted to tourmaline-quartz mica greisens and quartz *** NE-SW trending foliated contact zones of chlorite mica schist and porphyritic granite/gneisses have served as easy channels for the mineralizing vapours and solutions to percolate,which formed ore bearing greisens and quartz *** mineralization is erratic and manifested by sparse and sporadic disseminations of wolframite and scheelite associated with minor amount of molybdenite and *** fluid inclusion microthermometry on mineralized quartz veins and quartz-tourmaline veins reveals the existence of a metamorphogenic aqueous-gaseous(H2O-CO2+NaCl)fluid that underwent phase separation and gave rise to gaseous(CO2)*** salinity of tungsten mineralizations varies from low to high(1.32 wt.%to 40.44 wt.%NaCl eq.).The estimated P-T range of tungsten mineralization varies from 1.2 to 2.2 kbar at 280 to 390℃.Raman spectroscopy reveals that the fluid inclusions mainly contain H2O and CO2 with rarely H2S and *** isotopic data reveal that the sulfur isotope fractions from the depositsδ^34S ranging from+3.1‰to+3.35‰,suggesting the deep crustal source for the sulfur,which can be further interpreted as a single(magmatic)supply of sulfur during magmatic-hydrothermal *** studies reveal the presence of chlorides such as FeCl2/MgCl2 and CaCl2,indicating t

关键词： Sakoli fold belt fluid inclusions tungsten

A Context Sensitive Multilevel Thresholding Using Swarm Based Algorithms

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IEEE/CAA Journal of Automatica Sinica 2019年第6期6卷 1471-1486页

作者： Shreya Pare Anil kumar Varun Bajaj girish kumar Singh PDPM Indian Institute of Information Technology Design and Manufacturing Jabalpur 482005MPIndia Institute of Technology Roorkee Uttarakhand 247667India

In this paper, a comprehensive energy function is used to formulate the three most popular objective functions:Kapur's, Otsu and Tsalli's functions for performing effective multilevel color image thresholding. These new energy based objective criterions are further combined with the proficient search capability of swarm based algorithms to improve the efficiency and robustness. The proposed multilevel thresholding approach accurately determines the optimal threshold values by using generated energy curve, and acutely distinguishes different objects within the multi-channel complex images. The performance evaluation indices and experiments on different test images illustrate that Kapur's entropy aided with differential evolution and bacterial foraging optimization algorithm generates the most accurate and visually pleasing segmented images.

关键词： Color image segmentation Kapur's entropy multilevel thresholding Otsu method swarm based optimization algorithms Tsalli's entropy

PREPARATION AND CHARACTERIZATION OF PVA BASED SOLID POLYMER ELECTROLYTES FOR ELECTROCHEMICAL CELL APPLICATIONS

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Chinese Journal of Polymer Science 2013年第4期31卷 641-648页

作者： Anji reddy Polu Ranveer kumar Department of Physics K L UniversityGuntur 522502India Department of Physics Dr. Hari Singh Gour University (A Central University)Sagar M.P. 470003India

Solid polymer electrolyte films containing poly（vinyl alcohol）（PVA） and magnesium nitrate （Mg（NO3）2） were prepared by solution casting technique and characterized by using XRD, FTIR, DSC and AC impedance spectroscopic analysis. The amorphous nature of the polymer electrolyte films has been confirmed by XRD. The complex formation between PVA and Mg salt has been confirmed by FTIR. The glass transition temperature decreases with increasing the Mg salt concentration. The AC impedance studies are performed to evaluate the ionic conductivity of the polymer electrolyte films in the range of 303-383 K, and the temperature dependence seems to obey the Arrhenius behavior. Transport number measurements show that the charge transport is mainly due to ions. Electrochemical cell of configuration Mg/（PVA ＋ Mg（NO3）2）（70：30）/（12 ＋ C ＋ electrolyte） has been fabricated. The discharge characteristics of the cell were studied for a constant load of 100 kΩ.

关键词： Polymer electrolyte XRD DSC Ionic conductivity Electrochemical cell.

Zinc Oxide Nanostructures for NO_2 Gas–Sensor Applications:A Review

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Nano-Micro Letters 2015年第2期7卷 97-120页

作者： Rajesh kumar O.Al-Dossary girish kumar Ahmad Umar PG Department of Chemistry JCDAV College Department of Physics King Saud University Department of Chemistry Faculty of Arts and Sciences Najran University Promising Centre for Sensors and Electronic Devices (PCSED) Najran University

Because of the interesting and multifunctional properties,recently,ZnO nanostructures are considered as excellent material for fabrication of highly sensitive and selective gas ***,ZnO nanomaterials are widely used to fabricate efficient gas sensors for the detection of various hazardous and toxic *** presented review article is focusing on the recent developments of NO2gas sensors based on ZnO *** review presents the general introduction of some metal oxide nanomaterials for gas sensing application and finally focusing on the structure of ZnO and its gas sensing *** gas sensing characteristics such as gas response,response time,recovery time,selectivity,detection limit,stability and recyclability,etc are also discussed in this ***,the utilization of various ZnO nanomaterials such as nanorods,nanowires,nano-micro flowers,quantum dots,thin films and nanosheets,etc for the fabrication of NO2gas sensors are also ***,various factors such as NO2concentrations,annealing temperature,ZnO morphologies and particle sizes,relative humidity,operating temperatures which are affecting the NO2gas sensing properties are discussed in this ***,the review article is concluded and future directions are presented.

关键词： ZnO nanostructure Gas sensors Sensor parameters Sensor mechanism

Substrate Temperature Dependent Properties of Cu Doped NiO Films Deposited by DC Reactive Magnetron Sputtering

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Journal of Materials Science & Technology 2013年第7期29卷 647-651页

作者： Yarraguntla Ashok kumar reddy Akepati Sivasankar reddy Pamanji Sreedhara reddy Department of Physics Sri Venkateswara UniversityTirupathi 517502India Division of Advanced Materials Engineering Kongju National UniversityBudaedongCheonan CitySouth Korea

The NiO-Cu composite films were deposited on a glass substrate at various substrate temperatures by DC reactive magnetron sputtering technique. The effect of substrate temperature on the structural, optical, morphological and electrical properties of the films was mainly investigated. X-ray diffraction studies revealed that when the substrate temperature increased to above 200 ℃, the preferred orientation tended to move to another preferred site from （220） to （111） and had a band gap values increased with increasing substrate observed that the grain size and root mean square stable cubic structure. The optical transmittance and temperature. From the morphological studies, it was roughness were increased with increasing substrate temperature. The electrical resistivity of the film decreased to 0.017 Ωcm at high substrate temperature of 400 ℃.

关键词： Sputtering NiO-Cu composite films Substrate temperature Crystallite size Electrical resistivity

PSO Based Controlled Six-phase Grid Connected Induction Generator for Wind Energy Generation

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CES Transactions on Electrical Machines and Systems 2021年第1期5卷 41-49页

作者： Arif Iqbal girish kumar Singh Electrical Engineering Department Rajkiya Engineering College Ambedkar NagarUP 224122India Electrical Engineering Department Indian Institute of technology RoorkeeUttarakhand 247667India

This paper deals a detailed performance investigation of asymmetrical six-phase grid connected induction generator(GCIG)in two proposed configurations in variable speed *** the system development,regulation of DC-link voltage has been proposed using particle swarm optimization(PSO)based PI controller,ensuring the power flow to utility grid through back to back *** closed loop operation of asymmetrical six-phase GCIG using indirect field oriented control in different configurations has been carried out in Matlab/Simulink *** results have been verified using real time test results on virtual platform of Typhoon HIL supported with some experimental validation.

关键词： Six-phase induction generator particle swarm optimization(PSO) indirect field oriented control

Chemical composition and source apportionment of PM2.5 and PM2.5-10 in Trombay （Mumbai, India）, a coastal industrial area

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Particuology 2018年第2期16卷 143-153页

作者： Sandeep Police Sanjay kumar Sahu Mahesh Tiwari Gauri girish Pandit Environmental Monitoring and Assessment Section Bhabha Atomic Research Centre Mumbai 400085 India Homi Bhabha National Institute Anushakti Nagar Mumbai 400094 India

PM2.5 and PM2.5 lo concentrations, elemental constituents, and sources in a densely populated coastal industrial area （Trombay, Mumbai） were investigated in 2010 and *** PM2.s and PM2.s lo concentra- tions were 13.50-71.60 and 22.40-127.78 p^g/m3, respectively. The daily PM25 concentrations exceeded the Indian Central Pollution Control Board limit （60 μg/m3） several days in winter. Of the elements analyzed, Si then Al had the highest concentrations in PM2.5- 10, but black carbon then Si had the highest concentrations in PM2.s. The element concentrations varied widely by season. Al, Ca, Fe, Si, and Ti con- centrations were highest in summer, Cl, Mg, and Na concentrations were highest in the monsoon season, and the other trace metal concentrations in both PM2.5 and PM2.5-10 were highest in winter. The PM2.5 and PM2.5-10 sources were apportioned by positive matrix factorization. PM2.5 and PM2.5-10 had six dominant sources, crustal material （8.7% and 25.3%, respectively）, sea salt spray （6.1% and 15.0%, respectively）, coal/biomass combustion （25.5% and 13.8%, respectively）, fuel oil combustion （19.0% and 11.2%, respectively）, road traffic （ 17.7% and 12.6%, respectively）, and the metal industry （ 10.6% and 7.0%, respectively）. Anthropogenic sources clearly contributed most to PM2.5 but natural sources contributed most to PM2.5-10.

关键词： Trombay PM2.5 PM2.5-10 Black carbon Metals Positive matrix factorization

A Fusion Model for Personalized Adaptive Multi-Product Recommendation System Using Transfer Learning and Bi-GRU

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Computers, Materials & Continua 2024年第12期81卷 4081-4107页

作者： Buchi reddy Ramakantha reddy Ramasamy Lokesh kumar School of Computer Science and Engineering Vellore Institute of TechnologyVellore632014TamilnaduIndia

Traditional e-commerce recommendation systems often struggle with dynamic user preferences and a vast array of products,leading to suboptimal user *** address this,our study presents a Personalized Adaptive Multi-Product Recommendation System(PAMR)leveraging transfer learning and Bi-GRU(Bidirectional Gated Recurrent Units).Using a large dataset of user reviews from Amazon and Flipkart,we employ transfer learning with pre-trained models(AlexNet,GoogleNet,ResNet-50)to extract high-level attributes from product data,ensuring effective feature representation even with limited ***-GRU captures both spatial and sequential dependencies in user-item *** innovation of this study lies in the innovative feature fusion technique that combines the strengths of multiple transfer learning models,and the integration of an attention mechanism within the Bi-GRU framework to prioritize relevant *** approach addresses the classic recommendation systems that often face challenges such as cold start along with data sparsity difficulties,by utilizing robust user and item *** model demonstrated an accuracy of up to 96.9%,with precision and an F1-score of 96.2%and 96.97%,respectively,on the Amazon dataset,significantly outperforming the baselines and marking a considerable advancement over traditional *** study highlights the effectiveness of combining transfer learning with Bi-GRU for scalable and adaptive recommendation systems,providing a versatile solution for real-world applications.

关键词： Personalized recommendation systems transfer learning bidirectional gated recurrent units(Bi-GRU) performance metrics adaptive systems product reviews