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ON FUZZY FAINTLY PRE-CONTINUOUS FUNCTIONS
Chetty, G. Palani,Balasubramanian, G. The Youngnam Mathematical Society Korea 2008 East Asian mathematical journal Vol.24 No.4
The aim of this paper is to introduce a new generalization of fuzzy faintly continuous functions called fuzzy faintly pre-continuous functions and also we have introduced and studied weakly fuzzy pre-continuous functions. Several characterizations of fuzzy faintly pre-continuous functions are given and some interesting properties of the above functions are discussed.
Chetty, R.,Gill, P.,Govender, D.,Bateman, A.,Chang, H.J.,Deshpande, V.,Driman, D.,Gomez, M.,Greywoode, G.,Jaynes, E.,Lee, C.S.,Locketz, M.,Rowsell, C.,Rullier, A.,Serra, S.,Shepherd, N.,Szentgyorgyi, W. B. Saunders Co ; Centrum Philadelphia 2012 Human pathology Vol.43 No.11
The aim of this study was to ascertain the level of concordance among gastrointestinal pathologists for regression grading in rectal cancers treated with neoadjuvant chemoradiation. Seventeen gastrointestinal pathologists participated using the Mandard, Dworak, and modified rectal cancer regression grading systems to grade 10 representative slides that were selected from 10 cases of rectal cancer treated with long-course neoadjuvant chemoradiation. The slides were scanned with a whole-slide scanner generating dynamic digitized images. The results showed very little concordance across the 3 grading systems, with κ values of 0.28, 0.35, and 0.38 for the Mandard, Dworak, and modified rectal cancer regression grading systems, respectively. In only 1 of 10 study cases was there unanimous grading concordance using the modified rectal cancer regression grading system. It was felt that these systems lacked precision and clarity for reproducible, accurate regression grading. The study concluded that there was a need for a simple, reproducible regression grading system with clear criteria, a cumulative or composite score taking into account all sections of the tumor bed that is sampled rather than the worst section (highest grade), and there should be a uniform method of sampling of these specimens.
Zernike-basis expansion of the fractional and radial Hilbert phase masks
N. Chetty,D.J. Griffith 한국물리학회 2015 Current Applied Physics Vol.15 No.6
The linear Hilbert phase mask or transform has found applications in image processing and spectroscopy. An optical version of the fractional Hilbert mask is considered here, comprising an imaging system with a circular, unobscured pupil in which a variable phase delay is introduced into one half of the pupil, split bilaterally. The radial Hilbert phase mask is also used in image processing and to produce optical vortices which have applications in optical tweezers and the detection of exoplanets. We subjected the fractional and radial Hilbert phase masks to Zernike function expansion in order to compute the image plane electromagnetic field distribution using Nijboer-Zernike theory. The Zernike functions form an orthogonal basis on the unit circle. The complex-valued Zernike expansion coefficients for these two phase masks were derived for use in the context of the Extended Nijboer-Zernike (ENZ) theory of image formation. The ENZ approach is of interest in that it allows a greater range of defocus to be dealt with, provides a simple means of taking a finite source size into account and has been adapted to high Numerical Aperture (NA) imaging applications. Our image plane results for the fractional Hilbert mask were verified against a numerical model implemented in the commercial optical design and analysis code, Zemax®. It was found that the Nijboer- Zernike result converged to the Zemax® result from below as the number of Zernike terms in the expansion was increased.
On fuzzy faintly pre-continuous functions
G. Palani Chetty,G. Balasubramanian 영남수학회 2008 East Asian mathematical journal Vol.24 No.4
The aim of this paper is to introduce a new generalization of fuzzy faintly continuous functions called fuzzy faintly pre-continuous functions and also we have introduced and studied weakly fuzzy precontinuous functions. Several characterizations of fuzzy faintly pre-continuous functions are given and some interesting properties of the above functions are discussed.
Idowu Richard Akomolafe,Naven Chetty 대한방사선종양학회 2021 Radiation Oncology Journal Vol.39 No.1
Purpose: This study investigated the possible radioprotective effect of Costus afer extract (CAE) on hematological and histopathological parameters of mice. Materials and Methods: Fifty-four male mice with mass between 37–43 g, 11–13 weeks old were used for this study. We divided the mice into six different groups containing nine animals, which were then further sub-divided into irradiated groups and un-irradiated groups. Animals received 250 mg/kg body weight extract of CAE by oral gavage for 6 days in addition to feeding and water ad libitum. Animals in the irradiated group were exposed to radiation at the Department of Radiotherapy and Oncology, Grey’s Hospital using a linear accelerator. Blood samples were collected at 48-hour post-irradiation for the hematology test followed by histopathology examination of kidney and liver. Results: Our findings revealed that 3 Gy and 6 Gy dose of X-ray radiation caused a significant reduction in the white blood cell, packed cell volume, hemoglobin, neutrophils, lymphocytes, eosinophils, and platelet counts compared with the control group. However, the administration of CAE before irradiation significantly increased the mentioned parameters. There was no increase in red blood cell and monocyte among treated groups compared with the control. Histopathological changes in the kidney and liver sections revealed that no visible lesion in the pretreated mice. Hepatocytes seem to be within normal histological limits. Conclusions: This study concludes that CAE offered some protection against radiation-induced hematological alterations, but there was no significant improvement in the histopathological parameters. Thus, further studies are needed to validate its radioprotective effect on histopathological variables.
Manju Mohan,RM. Kuppan Chetty,Vijayram Sriram,Mohd. Azeem,P. Vishal,G. Pranav ASCONS 2019 IJASC Vol.1 No.3
Background/Objectives: Waste bins are part of our lives for decades and mostly its condition are overflowing due to improper waste dumping, collection and management, which leads in foul smell and unhygienic condition, thus inherently results in environment pollution. Methods/Statistical analysis: Therefore, in this paper, design of a Waste Bin with real time monitoring is presented and a smart waste management system is proposed using the recent technical advancements of automation and Internet of Things (IoT). Findings: The capacitance sensor in the bin continuously monitors the level of the bin in real time and communicates to the central cloud where the bins are connected. Ultrasonic sensor is used to open and close the lid of the bin whenever the persons are nearby the bin. Such smart bins are connected to the cloud, where the bin status are communicated, recorded and monitored by the local bodies through and android app or a centralized server. Improvements/Applications: Thus the designed smart bin and proposed waste management system have better level of smartness compared to existing ones in metropolitan cities in a centralized manner.
Distribution of 5-HT_{3}, 5-HT_{4}, and 5-HT_{7} Receptors Along the Human Colon
( Nor S Yaakob ),( Kenneth A Chinkwo ),( Navinisha Chetty ),( Ian M Coupar ),( Helen R Irving ) 대한소화기기능성질환·운동학회 2015 Journal of Neurogastroenterology and Motility (JNM Vol.21 No.3
Background/Aims: Several disorders of the gastrointestinal tract are associated with abnormal serotonin (5-HT) signaling or metabolism where the 5-HT_{3} and 5-HT_{4} receptors are clinically relevant. The aim was to examine the distribution of 5-HT_{3}, 5-HT_{4}, and 5-HT_{7} receptors in the normal human colon and how this is associated with receptor interacting chaperone 3, G protein coupled receptor kinases, and protein LIN-7 homologs to extend previous observations limited to the sigmoid colon or the upper intestine. Methods: Samples from ascending, transverse, descending, and sigmoid human colon were dissected into 3 separate layers (mucosa, longitudinal, and circular muscles) and ileum samples were dissected into mucosa and muscle layers (n = 20). Complementary DNA was synthesized by reverse transcription from extracted RNA and expression was determined by quantitative or end point polymerase chain reaction. Results: The 5-HT_{3} receptor subunits were found in all tissues throughout the colon and ileum. The A subunit was detected in all samples and the C subunit was expressed at similar levels while the B subunit was expressed at lower levels and less frequently. The 5-HT_{3} receptor E subunit was mainly found in the mucosa layers. All splice variants of the 5-HT_{4} and 5-HT_{7} receptors were expressed throughout the colon although the 5-HT_{4} receptor d, g, and i variants were expressed less often. Conclusions: The major differences in 5-HT receptor distribution within the human colon are in relation to the mucosa and muscular tissue layers where the 5-HT_{3} receptor E subunit is predominantly found in the mucosal layer which may be of therapeutic relevance. (J Neurogastroenterol Motil 2015;21:361-369)
Kumar Vipin,Tripathi Anuj,Choi Seyong,Chitumalla Ramesh Kumar,서지연,장준경,Chetti Prabhakar 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.7
We establish a structure–property relation for the system having a cyclooctatetraene (COT) ring fused with four five-membered heterocyclic rings. The two five-membered heterocycles selected are furan and selenophene and their fused structure with COT is known as cyclooctatetrafuran (COF) and cyclooctatetraselenophene (COSe), respectively. We found 15 geometrical isomers of each COF and COSe and their structural stability and optoelectronic properties have been evaluated by quantum chemical simulations. The density functional theory (DFT) and time-dependent DFT simulations were employed for a systematic review of all isomers. Electronic excitations, hole reorganization energies, electron reorganization energies, ionization potentials, and electron affinities, of all the isomers, were reported. Based on our comparative study, it is shown that one of the isomers is suggested as a better charge transport material.