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Nida Jareemit,Navin Horthongkham,Suwanit Therasakvichya,Boonlert Viriyapak,Perapong Inthasorn,Mongkol Benjapibal,Vuthinun Achariyapota,Irene Ruengkhachorn 대한산부인과학회 2022 Obstetrics & Gynecology Science Vol.65 No.4
영어 ObjectiveTo investigate the distribution of human papillomavirus (HPV) genotypes in low-grade squamous intraepithelial lesion(LSIL) cytology and the immediate risk of cervical intraepithelial neoplasia grade 2 or higher (CIN2+) lesions. MethodsThis prospective cross-sectional study enrolled women aged ≥21 years that were diagnosed with LSIL cytology at SirirajHospital (Bangkok, Thailand) during 2017-2019. Anyplex II HPV testing was performed to detect 14 high-risk HPVcases prior to colposcopy-directed biopsy. ResultsIn total, 318 patients were included in the final analysis. Of those, 24 (7.5%), 241 (75.8%), 53 (16.7%) were aged 21-25 years, 25-50 years, and ≥50 years, respectively. Eighty-two patients (25.8%) had abnormal screening results withinthe previous 5 years. High-risk HPV infection was found in 188 patients (59.1%) with 127 (39.9%) having single and61 (19.2%) having multiple infections. The five most common HPV genotypes were HPV 66 (18.6%), HPV51 (9.7%),HPV58 (9.4%), HPV16 (9.1%), and HPV56 (8.2%). The immediate risk of CIN2+ was 6% in LSIL, regardless of the HPVstatus, 8% in high-risk HPV-positive LSIL, and 3.1% in high-risk HPV-negative LSIL. When using 6% as the thresholdrisk for colposcopy, performing reflex HPV testing in LSIL cytology can decrease the number of colposcopies by 40.9%,with an area under the receiver operating characteristic curve of 0.6 (95% confidence interval, 0.5-0.7). ConclusionThe study findings support the idea that geographic variations affect the HPV genotype. Reflex HPV testing maydecrease the number of colposcopies in cytology-based screening regions with a high prevalence of low-carcinogenicHPV.
Electrophoretic deposition of PVA coated hydroxyapatite on 316L stainless steel
Nida Iqbal,Rabia Nazir,Anila Asif,Aqif Anwar Chaudhry,Muhammad Akram,Goh Yi Fan,Aftab Akram,Rashid Amin,박성하,Rafaqat Hussain 한국물리학회 2012 Current Applied Physics Vol.12 No.3
Polyvinyl alcohol (PVA) coated hydroxyapatite was deposited onto a 316L stainless steel substrate by electrophoretic deposition. Deposition was carried out in a methanol suspension at pH 5.5 using a graphite rod as an anode. Parameters such as PVA concentration, deposition voltage and time were optimized to achieve a homogeneous, crack-free adhesive coating. Techniques such as X-ray diffraction and Fourier transform infrared spectroscopy were used to study the phase composition of the coated materials and the stability of hydroxyapatite in the presence of PVA.
Maximum Likelihood SNR Estimation for QAM Signals Over Slow Flat Fading Rayleigh Channel
( Nida Ishtiaq ),( Shahzad A. Sheikh ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.11
Estimation of signal-to-noise ratio (SNR) is an important problem in wireless communication systems. It has been studied for various constellation types and channels using different estimation techniques. Maximum likelihood estimation is a technique which provides efficient and in most cases unbiased estimators. In this paper, we have applied maximum likelihood estimation for systems employing square or cross QAM signals which are undergoing slow flat Rayleigh fading. The problem has been considered under various scenarios like data-aided (DA), non-data-aided (NDA) and partially data-aided (PDA) and the performance of each type of estimator has been evaluated and compared. It has been observed that the performance of DA estimator is best due to usage of pilot symbols, with the drawback of greater bandwidth consumption. However, this can be catered for by using partially data-aided estimators whose performance is better than NDA systems with some extra bandwidth requirement.
Video augmentation technique for human action recognition using genetic algorithm
Nudrat Nida,Muhammad Haroon Yousaf,Aun Irtaza,Sergio A. Velastin 한국전자통신연구원 2022 ETRI Journal Vol.44 No.2
Classification models for human action recognition require robust features and large training sets for good generalization. However, data augmentation methods are employed for imbalanced training sets to achieve higher accuracy. These samples generated using data augmentation only reflect existing samples within the training set, their feature representations are less diverse and hence, contribute to less precise classification. This paper presents new data augmentation and action representation approaches to grow training sets. The proposed approach is based on two fundamental concepts: virtual video generation for augmentation and representation of the action videos through robust features. Virtual videos are generated from the motion history templates of action videos, which are convolved using a convolutional neural network, to generate deep features. Furthermore, by observing an objective function of the genetic algorithm, the spatiotemporal features of different samples are combined, to generate the representations of the virtual videos and then classified through an extreme learning machine classifier on MuHAVi-Uncut, iXMAS, and IAVID-1 datasets.
Anticancer Activity of Petroselinum sativum Seed Extracts on MCF-7 Human Breast Cancer Cells
Farshori, Nida Nayyar,Al-Sheddi, Ebtesam Saad,Al-Oqail, Mai Mohammad,Musarrat, Javed,Al-Khedhairy, Abdulaziz Ali,Siddiqui, Maqsood Ahmed Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.10
Pharmacological and preventive properties of Petroselinum sativum seed extracts are well known, but the anticancer activity of alcoholic extracts and oil of Petroselinum sativum seeds on human breast cancer cells have not been explored so far. Therefore, the present study was designed to investigate the cytotoxic activities of these extracts against MCF-7 cells. Cells were exposed to 10 to $1000{\mu}g/ml$ of alcoholic seed extract (PSA) and seed oil (PSO) of Petroselinum sativum for 24 h. Post-treatment, percent cell viability was studied by 3-(4, 5-dimethylthiazol-2yl)-2, 5-biphenyl tetrazolium bromide (MTT) and neutral red uptake (NRU) assays, and cellular morphology by phase contrast inverted microscopy. The results showed that PSA and PSO significantly reduced cell viability, and altered the cellular morphology of MCF-7 cells in a concentration dependent manner. Concentrations of $50{\mu}g/ml$ and above of PSA and $100{\mu}g/ml$ and above of PSO were found to be cytotoxic in MCF-7 cells. Cell viability at 50, 100, 250, 500 and $1000{\mu}g/ml$ of PSA was recorded as 81%, 57%, 33%, 8% and 5%, respectively, whereas at 100, 250, 500, and $1000{\mu}g/ml$ of PSO values were 90%, 78%, 62%, and 8%, respectively by MTT assay. MCF-7 cells exposed to 250, 500 and $1000{\mu}g/ml$ of PSA and PSO lost their typical morphology and appeared smaller in size. The data revealed that the treatment with PSA and PSO of Petroselinum sativum induced cell death in MCF-7 cells.