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Optimized Deep Learning Model for Effective Spectrum Sensing in Dynamic SNR Scenario

Computer Systems Science & Engineering 2023年第5期45卷 1279-1294页

作者： G.Arunachalam p.sureshkumar Department of Electronics and Communication Engineering Gnanamani College of TechnologyNamakkalTamil NaduIndia Department of Electrical and Electronics Engineering Mahendra Engineering College(Autonomous)NamakkalTamil NaduIndia

The main components of Cognitive Radio networks are primary Users(pU)and Secondary Users(SU).The most essential method used in Cognitive networks is Spectrum Sensing,which detects the spectrum band and opportunistically accesses the free white areas for different *** the free spaces helps to increase the spectrum *** the existing spectrum sensing techniques such as energy detectors,cyclo-stationary detectors suffer from various problems such as complexity,non-responsive behaviors under low Signal to Noise Ratio(SNR)and computational overhead,which affects the performance of the sensing *** algorithms such as Long-Short Term Memory(LSTM),Convolutional Neural Networks(CNN),and Recurrent Neural Networks(RNN)play an important role in designing intelligent spectrum sensing techniques due to the excellent learning ability of deep learning frameworks,but still require improvisation in terms of sensing accuracy under dynamic environmental *** paper,we propose the novel and hybrid CNN-Cuttle-Fish Optimized Long Short Term Memory(COLSTM),an improved version of LSTM that is well suited for the dynamic changes of environmental SNR with less computational overhead and *** proposed COLSTM based spectrum sensing technique exploits the various statistical features from spectrum data of pU to improve the sensing ***,the addition of shuttle-fish optimization in LSTM has reduced the computational overhead and complexity which in turn enhanced the sensing *** proposed methodology is validated on spectrum data acquired using Raspberrypi-RTLSDR experimental *** proposed spectrum sensing technique and the existing classical spectrum sensing techniques are *** results show that the proposed scheme has shown the brighter enhancement of performance under different SNR ***,the improvised performance has been achieved at low complexity and low computational over

关键词： Spectrum sensing cuttle-fish long short term memory raspberry pilow SNR convolutional neural networks

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Electrical and non-linear optical studies on electrospun ZnO/BaO composite nanofibers

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Frontiers of Materials Science 2012年第1期6卷 69-78页

作者： G.NIXON SAMUEL VIJAYAKUMAR M.RATHNAKUMARI p.sureshkumar Department of physics R.M.K.Engineering CollegeR.S.M.NagarKavaraipettai 601206India Materiais Research Centre Department of PhysicsVelammal Engineering CollegeChennai 600066India

Nanocapacitors and nonvolatile ferroelectric random access memories require nanoscale thin film coatings with ferroelectric properties. One dimensional ferroelectric nanofibers are used in ferroelectric memory devices owing to the fact that decrease of the dimensionality of the memory device elements will reduce the addressing and appreciably increase the storage capacity, Novel ZnO/BaO nanocomposite fibers exhibiting ferroelectric properties have been prepared in the form of non-woven mesh by electrospinning the sol derived from the sol-gel route, Thin cylindrical nanofibers of average diameter 100 nm have been obtained and their morphology is confirmed by SEM and AFM images. In the electrospinning process, the effect of the working distance on the fiber morphology was studied and it showed that working distance between 11 and 15 cm can produce fibers without beads and the decrease in working distance in this range increases the fiber diameter. powder XRD was used to identify the phases and EDX analysis confirmed the presence of ZnO/BaO. Dielectric and non-linear optical properties have also been studied. The dielectric studies showed that ZnO/BaO composite nanofibers undergo a phase transition from ferroelectric to paraelectric at 323 K.

关键词： nanocomposite fiber sol-gel process dielectric property non-linear opticalproperty ferroelectric property

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Excellent photoluminescence and electrochemical properties of Sm^(3+) doped Ca_(2)MgSi_(2)O_(7) nanophosphor:Display and electrochemical sensor applications

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Journal of Rare Earths 2024年第6期42卷 1046-1055,I0002页

作者： R.B.Basavaraj K.sureshkumar D.p.Aarti M.B.Madhusudana Reddy G.Nagaraju T.Ramakrishnappa G.R.Navyashree K.R.Venkatesha Babu K.S.Hemalatha Department of physics BMS Institute of Technology and ManagementBangalore560064India Department of Chemistry BMS Institute of Technology and ManagementBangalore560064India Department of Chemistry School of Applied SciencesREVA UniversityBangalore560064India Energy Materials ResearchLaboratory Department of ChemistrySiddaganga Institute of TechnologyTumakuru57203KarnatakaIndia School of physical Sciences REVA UniversityBangalore560057Indi Department of physics Govt.Science CollegeBengaluru560001India Department of physics Maharani Science College for WomenMaharani Cluster UniversityBengaluru560001India

A series of orange-red light emitting Ca_(2)MgSi_(2)O_(7):Sm^(3+)nanopowders were fabricated via low-cost ecofriendly green combustion technique using Aloe vera gel as *** phase purity of the samples were confirmed by the powder X-ray diffraction(pXRD)*** single-phase tetragonal structure is observed from the pXRD results with no additional impurity *** band gap energy of the fabricated powders was estimated by diffuse reflectance spectra(DRS)and is found to be in the range of 4.01-5.98 eV.A high resolution scanning electron microscope(SEM)was used to study the morphological behaviour of the ***-like structures are observed from the SEM *** particle size was evaluated by transmission electron microscopy(TEM)and is found to be~50 *** interplanar distance is found to be 0.53 *** properties were systematically studied in *** phosphors are successfully excited at 403 nm NUV light,producing reddish-orange characteristic *** emission peaks are centered at 558(^(4)G_(5/2)→^(6)H_(5/2)),607(^(4)G_(5/2)→^(6)H_(7/2))and 645 nm(^(4)G_(5/2)→^(6)H_(9/2)),*** the observed peaks the red emanation(^(4)G_(5/2)→^(6)H_(7/2))is stronger than the orange emission(^(4)G_(5/2)→^(6)H_(5/2))in the current *** photoluminescent concentration quenching is noticed above 5 mol%Sm^(3+)ion doping *** dipole-dipole interaction resulting in cross relaxation is found to be the principal cause of concentration quenching *** color features such as Commission Internationale de I’Eclairage(CIE)and correlated color temperature(CCT)were studied in *** optimized chromaticity coordinates were estimated to be(0.6363,0.3632),which fall in the reddish-orange *** average CCT value obtained is 3362 *** average color purity is found to be~82%.Sm^(3+)incorporated Ca_(2)MgSi_(2)O_(7) samples are possible contender for single white light generation commercial candidates owing to

关键词： Green combustion photoluminescence Orange-red emission Color purity Sensors Rare earths

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Quality indicators in respiratory therapy

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World Journal of Critical Care Medicine 2024年第2期13卷 116-125页

作者： Manjush Karthika sureshkumar Vanajakshy Kumaran praveen Beekanahaali Mokshanatha Research and Innovation Council Srinivas Institute of Medical Sciences and Research CenterSrinivas UniversityMangalore 574146India Department of Health and Medical Sciences Liwa CollegeAbu DhabiUnited Arab Emirates Healthcare Management Tata Institute of Social SciencesMumbai 400088India Medical Administration NS Memorial Institute of Medical SciencesKollam 691020India Research and Innovation Council Srinivas UniversityMangalore 574146India

Quality indicators in healthcare refer to measurable and quantifiable parameters used to assess and monitor the performance,effectiveness,and safety of healthcare *** indicators provide a systematic way to evaluate the quality of care offered,and thereby to identify areas for improvement and to ensure that patient care meets established standards and best *** therapists play a vital role in areas of clinical administration such as infection control practices and quality improvement *** indicators serve as essential metrics for respiratory therapy departments to assess and enhance the overall quality of *** systematically tracking and analyzing indicators related to infection control,treatment effectiveness,and adherence to protocols,respiratory care practitioners can identify areas to improve and implement evidence-based *** article reviewed how to identify,implement,and monitor quality indicators specific to the respiratory therapy departments to set benchmarks and enhance patient outcomes.

关键词： Healthcare Quality indicators Structure process Outcome Respiratory therapy Department Respiratory therapists

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Effectiveness of m-health technology-enabled physical activity program on physical activity adoption and adherence in people with hypertension in India:A randomized controlled trial protocol

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Chronic Diseases and Translational Medicine 2024年第2期10卷 92-101页

作者： Vidhi Thakar sureshkumar Kamalakannan V.prakash Ashok&Rita patel Institute of physiotherapy Charotar University of Science and TechnologyChangaAnandGujaratIndia Department of Social Work Education and Community-WellbeingNorthumbria UniversityNewcastle upon TyneUK

Background Exercise and medication have similar benefits in reducing blood pressure(Bp);however,hypertension management initiatives primarily focus on *** is due to scarce research on the effectiveness of implementation strategies for optimal exercise adoption and *** were found to be effective in delivering hypertension care and increase exercise *** this,only a small number of research projects in India have used smartphones as a strategy for managing *** We hypothesized that smartphone application-based care would lead to higher exercise adherence among adults(30–79 years)with hypertension compared to those who receive usual *** will be a multicentric,randomized controlled,parallel-design,superiority clinical *** outcome assessor and data analyst will be blinded to group *** in the intervention group will receive mobile application-based care for 6 *** in the usual care group will receive a standard *** groups will receive the same number of *** The primary outcome is the difference in the proportion of people adherent to the recommended level of physical activity evaluated using an exercise adherence rating scale in the intervention group and the control *** adoption will be measured as the percentage of eligible participants in each study setting willing to initiate the exercise *** secondary outcome includes differences in systolic and diastolic Bp and self-management(evaluated using the Hypertension Self-Care profile).The trial outcome will be accompanied by a process *** This research will inform about the comparative effectiveness of conventional and m-health interventions for exercise adoption and adherence in people with hypertension in resource-constrained settings.

关键词： hypertension low-and middle-income countries m-health physical activity adherence

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Complexes and complexities: INO80 takes center stage

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Molecular plant 2021年第11期14卷 1776-1778页

作者： Sridevi sureshkumar sureshkumar Balasubramanian School of Biological Sciences Monash UniversityVIC 3800Australia

Chromatin remodeling and transcriptional reprogramming are key mechanisms through which plants respond to environmental *** dynamics associated with the pres-ence/absence(incorporation/eviction)of the histone variant H2A.Z is one of the key chromatin remodeling mechanisms associated with environmental response(Coleman-Derr and Zilberman,2012).Very recently,some excellent papers(Shang et al.,2021;Willige et al.,2021;Xue et al.,2021)have addressed the role of a less-explored component of this chromatin remodeling-the INO80 ***,we discuss novel insights revealed in these papers and their potential impacts.

关键词： complex. programming insight

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Refining the Role of Simultaneous Liver Kidney Transplantation

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Journal of Clinical and Translational Hepatology 2018年第3期6卷 289-295页

作者： Sabiha M.Hussain Kalathil K.sureshkumar Division of Nephrology and Hypertension Department of MedicineAllegheny General HospitalAllegheny Health NetworkPittsburghPAUSA

Adoption of the model for end-stage liver disease score by Organ procurement and Transplant Network(OpTN)deceased donor liver allocation policy in 2002 has led to an increase in the number of simultaneous liver kidney(SLK)*** kidney function recovery following liver transplantation is difficult to predict,al ocation of the kidney for SLK trans-plantation thus far has not been based on much rationale and *** of OpTN policy towards SLK organ allocation has resulted in great variations among transplant centers regarding SLK *** use of kidneys towards SLK transplantation diverts deceased donor kidneys away from candidates awaiting kidney-alone *** OpTN/United Network of Organ Sharing has imple-mented medical eligibility criteria for adult SLK transplantation which also includes a concept of safety *** of the new policy is a move in a positive direction,providing consistency in our practice and evidence-based guidelines in selecting candidates for SLK *** policy needs to be monitored prospectively and modified based on new data that wil emerge over *** review outlines the literature on SLK transplantation and efforts towards developing rational policy on SLK organ allocation.

关键词： Liver kidney transplantation Graft survival MELD score Creatinine GFR

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Brain Tumor:Hybrid Feature Extraction Based on UNet and 3DCNN

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Computer Systems Science & Engineering 2023年第5期45卷 2093-2109页

作者： sureshkumar Rajagopal Tamilvizhi Thanarajan Youseef Alotaibi Saleh Alghamdi Center for System Design Chennai Institute of TechnologyChennai600069India Department of Information Technology Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Department of Computer Science College of Computer and Information SystemsUmm Al-Qura UniversityMakkah21955Saudi Arabia Department of Information Technology College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

Automated segmentation of brain tumors using Magnetic Resonance Imaging(MRI)data is critical in the analysis and monitoring of disease *** a result,gliomas are aggressive and diverse tumors that may be split into intra-tumoral groups by using effective and accurate segmentation *** is intended to extract characteristics from an image using the Gray Level Co-occurrence(GLC)matrix feature extraction method described in the proposed *** Convolutional Neural Networks(CNNs),which are commonly used in biomedical image segmentation,CNNs have significantly improved the precision of the state-of-the-art segmentation of a brain *** two segmentation networks,a U-Net and a 3D CNN,we present a major yet easy combinative technique that results in improved and more precise *** U-Net and 3D CNN are used together in this study to get better and more accurate estimates of what is going *** the dataset,two models were developed and assessed to provide segmentation maps that differed fundamentally in terms of the segmented tumour ***,the estimates was made by two separate models that were put together to produce the final *** comparison to current state-of-the-art designs,the precision(percentage)was 98.35,98.5,and 99.4 on the validation set for tumor core,enhanced tumor,and whole tumor,respectively.

关键词： Medical imaging segmentation U-net 3D CNN brain tumor

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Emerging role of cell-free DNA in kidney transplantation

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World Journal of Experimental Medicine 2021年第5期11卷 55-65页

作者： Bhavna Chopra Kalathil K sureshkumar Nephrology and Hypertension Allegheny General HospitalPittsburghPA 15212United States Division of Nephrology Department of MedicineAllegheny General HospitalAllegheny Health NetworkPittsburghPA 15212United State

Monitoring kidney transplants for rejection conventionally includes serum creatinine,immunosuppressive drug levels,proteinuria,and donor-specific antibody(DSA).Serum creatinine is a late marker of allograft injury,and the predictive ability of DSA regarding risk of rejection is *** analysis of an allograft biopsy is the standard method for diagnosing rejection but is invasive,inconvenient,and carries risk of *** has been a long quest to find a perfect biomarker that noninvasively predicts tissue injury caused by rejection at an early stage,so that diagnosis and treatment could be pursued without delay in order to minimize irreversible damage to the *** this review,we discuss relatively novel research on identifying biomarkers of tissue injury,specifically elaborating on donor-derived cell-free DNA,and its clinical utility.

关键词： Biomarker Donor-derived cell-free DNA Kidney allograft outcomes Kidney transplant Allograft biopsy

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Effects of clump spacing on nutrient distribution and root activity of Dendrocalamus strictus in the humid region of Kerala,peninsular India

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Journal of Forestry Research 2017年第6期28卷 1133-1144页

作者： B. H. Kittur K. Sudhakara B. Mohan Kumar T. K. Kunhamu p. sureshkumar Department of Silviculture and Agroforestry College of Forestry Kerala Agricultural UniversityVellanikkara Thrissur Kerala 680656 India School of Ecology and Environment Studies Nalanda University Rajgir District Nalanda Bihar 803116 India Department of Soil Science and Agricultural Chemistry Radio-tracer Laboratory College of Horticulture Kerala Agricultural University Vellanikkara ThrissurKerala 680656 India

The humid agroclimatic conditions of Kerala,India permit the cultivation of an array of bamboo species of which Dendrocalamus strictus Roxb.(Nees.) is an important one on account of its high growth rate and multiple uses. Stand density, a potential tool in controlling the productivity of woody ecosystems, its effect on growth and root distribution patterns may provide a better understanding of productivity optimization especially when bamboo-based intercropping options are *** attributes of 7-year-old bamboo(D. strictus) stands managed at variable spacing(4×4 m, 6×6 m, 8×8 m,10×10 m, 12×12 m) were studied. Functional root activity among bamboo clumps were also studied using a radio tracer soil injection method in which the radio isotopep was applied to soil at varying depths and lateral distances from the clump. Results indicate that spacing exerts a profound influence on growth of bamboo. Widely spaced bamboo exhibited higher clump diameters and crown widths while clump heights were better under closer spacing. Clump height was 30% lower and DBH 52%higher at the widest spacing(12×12 m) compared to the closest spacing(4×4 m). With increasing soil depth and lateral distance, root activity decreased significantly. Root activity near the clump base was highest(809 counts per minute, cpm; 50 cm depth and 50 cm lateral distance) at 4×4 m. Tracer study further showed wider distribution of root activity with increase in clump spacing. It may be concluded that the intensive foraging zone of bamboo is within a 50-cm radius around the clump irrespective of spacing. N, p and K content in the upper 20 cm was 2197,21, and 203 kg/ha respectively for the closely spaced bamboo(4×4 m) which were significantly higher than corresponding nutrient content at wider spacings. About 50% of N, p and K were present within the 0–20 cm soil layer, which decreased drastically beyond the 20 cm *** results suggest that stand management practices through planting density regula

关键词： Bamboo Clump spacing Functional root activity Radio tracer 32p Soil nutrients

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