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THE EFFECT OF MAGNETIC FIELDS ON LOW FREQUENCY OSCILLATING NATURAL CONVECTION WITH PRESSURE GRADIENT

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Applied Mathematics and Mechanics(English Edition) 2003年第3期24卷 274-283页

作者： G.C.Sharma madhu jain Mahesh Chandra School of Mathematical Sciences Institute of Basic ScienceSchool of Mathematical SciencesInstitute of Basic ScienceSchool of Mathematical SciencesInstitute of Basic Science KhandariAgra-282002IndiaKhandariAgra-282002IndiaKhandariAgra-282002India

The oscillating natural convection in the presence of transverse magnetic field with time depending pressure gradient is studied. The analysis of the problem is carried out by assuming that the fluid is flowing in a parallel plate configuration. The emphasis is on low frequency oscillating convective flows induced by g-jitter associated with micro gravity because of their importance to the space processing materials. A general solution for an oscillating flow in the presence of transverse magnetic field is carried out. Some special cases of the oscillating flow and its response to an applied magnetic field are performed. It was observed that the behavior of oscillating free convective flows depends on frequency, amplitude of the driving buoyancy forces, temperature gradient,magnetic field and the electric conditions of the channel walls. In the absence of magnetic field, buoyancy force plays a predominant role in driving the oscillatory flow pattern, and velocity magnitude is also affected by temperature gradients. To suppress the oscillating flow external magnetic field can be used. It is also found that the reduction of the velocity is inversely proportional to the square of the applied magnetic field with conducting wall but directly proportional to the inverse of the magnetic field with insulating wall. Detailed calculations and computational results are also carried out to depict the real situation.

关键词： convection g- jitter acceleration buoyancy force magnetic field pressure gradient

An association between maternal lead and cadmium levels and birth weight of the babies in North Indian population

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Open Journal of Obstetrics and Gynecology 2013年第3期3卷 331-336页

作者： Divya Dwivedi madhu jain Shuchi jain Department of Obstetrics & Gynaecology Institute of Medical Sciences Banaras Hindu University Varanasi India

Lead is listed as the 2nd and Cadmium as the 7th hazardous substance by the Agency for Toxic Substances and Disease Registry (ATSDR). Exposure to Lead and Cadmium above the permissible levels among pregnants may cause adverse effects on newborns in the form of Low Birth Weight and Preterm Labor, etc. The objectives of this study were to find out the level of Lead and Cadmium in maternal venous blood and cord blood and to find out the association of the levels of these metals with birth weight of babies. For this, the venous blood and cord blood were collected and quantitative estimation of Lead and Cadmium was carried out by Double Beam Atomic Absorption Spectrophotometer in 1000 women with average Body Mass Index. Results showed higher mean maternal blood Lead level (11.08 μg/dl with range of 2.6 - 21.3) than the normal recommended by Centre of Disease Control and Prevention (10 μg/dl). On the contrary, the mean Cadmium level was 0.095 μg/dl, which was below the normal value as assigned by WHO (0.1 μg/dl). In high Lead exposure group (>10 μg/dl), 43.7% of babies and in high Cadmium exposure group (>0.1 μg/dl), 46.2% of babies were found to have low birth weight. However, this was not statistically significant. Further research in this area in a larger sample size may provide information relevant enough to be transferred to decision makers to implement measures to effectively reduce heavy metals from the environment, thereby protecting future generations from their deleterious effects.

关键词： Lead Cadmium Environmental Exposure Birth Weight Venous Blood Cord Blood

An unusual case of ovarian torsion with infarction simulating malignancy in an adolescent girl

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Open Journal of Obstetrics and Gynecology 2011年第3期1卷 124-127页

作者： madhu jain Kusum Lata Shivi jain 不详

Torsion of the ovary is an uncommon condition. It is the 5th most common gynaecological emergency. It most commonly occur in reproductive age group, on right side, often in presence of congenital abnormalities of adnexa but may occur in their absence too. Adnexal torsion often poses a diagnostic challenge because of non specific symptoms of presentation. Ultrasound with colour Doppler may be helpful.

关键词： Adenexal Torsion Ovarian Infarction Colour Doppler

Prediction of Geopolymer Concrete Compressive Strength Using Convolutional Neural Networks

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 1455-1486页

作者： Kolli Ramujee Pooja Sadula Golla madhu Sandeep Kautish Abdulaziz S.Almazyad Guojiang Xiong Ali Wagdy Mohamed Department of Civil Engineering VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabadTelangana500090India Department of Information Technology VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabadTelangana500090India Department of Computer Science LBEF Campus(Asia Pacific University of Technology&InnovationMalaysia)Kathmandu44600Nepal Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia Guizhou Key Laboratory of Intelligent Technology in Power System College of Electrical EngineeringGuizhou UniversityGuiyang550025China Operations Research Department Faculty of Graduate Studies for Statistical ResearchCairo UniversityGiza12613Egypt Applied Science Research Center Applied Science Private UniversityAmmanJordan

Geopolymer concrete emerges as a promising avenue for sustainable development and offers an effective solution to environmental *** attributes as a non-toxic,low-carbon,and economical substitute for conventional cement concrete,coupled with its elevated compressive strength and reduced shrinkage properties,position it as a pivotal material for diverse applications spanning from architectural structures to transportation *** this context,this study sets out the task of using machine learning(ML)algorithms to increase the accuracy and interpretability of predicting the compressive strength of geopolymer concrete in the civil engineering *** achieve this goal,a new approach using convolutional neural networks(CNNs)has been *** study focuses on creating a comprehensive dataset consisting of compositional and strength parameters of 162 geopolymer concrete mixes,all containing Class F fly *** selection of optimal input parameters is guided by two distinct *** first criterion leverages insights garnered from previous research on the influence of individual features on compressive *** second criterion scrutinizes the impact of these features within the model’s predictive *** to enhancing the CNN model’s performance is the meticulous determination of the optimal *** a systematic trial-and-error process,the study ascertains the ideal number of epochs for data division and the optimal value of k for k-fold cross-validation—a technique vital to the model’s *** model’s predictive prowess is rigorously assessed via a suite of performance metrics and comprehensive score ***,the model’s adaptability is gauged by integrating a secondary dataset into its predictive framework,facilitating a comparative evaluation against conventional prediction *** unravel the intricacies of the CNN model’s learning trajectory,a loss plot is deployed to elucidate its learning rat

关键词： Class F fly ash compressive strength geopolymer concrete prediction deep learning convolutional neural network

Cr-induced fusion reactions to synthesize superheavy elements

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Nuclear Science and Techniques 2024年第5期35卷 122-130页

作者： S.madhu H.C.Manjunatha N.Sowmya B.M.Rajesh L.Seenappa R.S.Susheela Department of Physics R V College of EngineeringBangalore 560074India Visvesvaraya Technological University BelagaviKarnataka 590018India Department of Physics Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Physics Government First Grade CollegeDevanahallyKarnataka 562110India Department of Physics Government First Grade CollegeMulbagalKarnataka 563131India Department of Physics Government First Grade collegeNanjangudOoty RoadMysore 571301India

We investigated ^(50,52-54)Cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 *** cross sections produced in this investigation using ^(54)Cr projectiles were compared with those obtained in prior *** estimated cross sections from this analysis are consistent with the findings of prior *** the current study,the predicted cross section was found to be 42fb at 236 MeV for ^(53)Cr+^(243)Am,23.2 fb at 236 MeV for ^(54)Cr+^(247)Cm,95.6 fb at 240 MeV for ^(53)Cr+248Bk,and 1.33 fb at 242 MeV for ^(53)Cr+***,these projected cross sections with excitation energy and beam energy will be useful in future Cr-induced fusion reaction investigations.

关键词： Fusion cross sections Compound nucleus formation probability Survival probability Evaporation residue cross sections

Diagnostic Accuracy of Sonosalpingography for Assessing Tubal Pathology in Women with Secondary Infertility Taking Laparoscopy as Gold Standard

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Surgical Science 2012年第8期3卷 414-417页

作者： Amit Nandan Dhar Dwivedi madhu jain Suchi Tripathi Sunny Garg Shivi jain Institute of Medical Sciences: BHU Varanasi. India

Context: Secondary infertility is a major public health issue with growing urbanisation and increasing age of marriage among women. Disease limited to low socioeconomic strata is commonly seen in general population. Judicious and accurate assessment of underlying pathology targeting tubes should be undertaken. Aims: The aim of this observational study was to assess the diagnostic accuracy of sonosalpingography taking laparoscopy as gold standard in patients of secondary infertility. Main aim was to assess tubal factors as an underlying cause and to assess feasibility of a radiation free protocol in patients of reproductive age group. Settings and Design: The study was carried out in a hospital setting. A total of 123 patients were selected. Patients of primary infertility were excluded. Sonosalpingography was performed by a single experienced radiologist. This was confirmed by laparoscopy conducted by an experienced gynaecologist. Methods and Material: A detailed clinical and physical examination including internal examination was done. This was followed by sonosalpingography using high frequency TVS probe (Philips IU 22). All patients were subjected to laparoscopic evaluation on the same day. Statistical analysis: Sensitivity, specificity, diagnostic accuracy and predictive values. Results: Sonosalpingography was 72.91% sensitive, 81.33% specific with diagnostic accuracy of 78.05% and positive predictive value of 71.42% for tubal pathologies. Conclusions: Sonosalpingography is a very useful complementary diagnostic modality in assessment of tubal pathology. This should precede direct laparoscopic evaluation. Patients of secondary infertility can be assessed with a combination of sonosalpingography and laparoscopy. This saves the patient of radiation exposure as well as pain of contrast

关键词： Sonosalpingography Secondary Infertility Laparoscopy Chromopertubation

MRI is a state of art imaging modality in characterization of indeterminate adnexal masses

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Journal of Biomedical Science and Engineering 2013年第3期6卷 309-313页

作者： Amit Nandan Dhar Dwivedi Shivi jain Ram Chandra Shukla madhu jain Arvind Srivastava Ashish Verma Department of Obstetrics and Gynecology Institute of Medical Science Varanasi India Department of Radiodiagnosis and Imaging Institute of Medical Science Varanasi India

Aims and Objectives: The aim of this diagnostic observational study was to find an association of final diagnosis of adnexal masses suggested by MRI and compare it as an imaging modality in determining the origin, nature (benign/malignant) & characteristics of adnexal masses by calculating sensitivity, specificity, and diagnostic accuracy. Materials and Methods: The present study was carried out in 90 patients in the department of radio diagnosis and imaging, institute of medical sciences, Banaras Hindu University (BHU). The patients were referred from department of obstetrics & gynecology, institute of medical sciences. Majority of the referred cases were those who had clinical features of abdominal pain, abdominal lump, menstrual irregularity, ascites, and anorexia or weight loss & in whom adnexal mass was suspected clinically. Magnetic resonance imaging was performed using 1.5 Tesla MR Scanner, Magnetom Avanto (Siemens Healthcare). Results: Out of 114 masses, 17 (14.9%) were malignant. The benign adnexal masses were maximum in the age group 20 - 39 years (56/97, 57.7%), while malignant masses were mainly found in women ≥60 years of age (11/17, 64.7%). CA-125 level was grossly elevated in association with 35.3% of the malignant masses. On MRI, the sensitivity for the mass of ovarian origin was (97.7%) and specificity was (73.1%). The diagnostic accuracy was (92.1%). The mass of uterine origin had a sensitivity of (73.1%) and diagnostic accuracy (99.1%). Conclusion: MRI, because of its accuracy in identifying the origin of adnexal mass and characterizing the solid, hemorrhagic, fatty and fibrous content, may obviate surgery or significantly contribute to preoperative planning for a sonographically indeterminate mass. MRI is the state of the art imaging modality for evaluation of adnexal masses with an overall high diagnostic accuracy.

关键词： MRI Adnexal Masses Diagnostic Accuracy

Recent updates on nano-phyto-formulations based therapeutic intervention for cancer treatment

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Oncology Research 2024年第1期32卷 19-47页

作者： ABHISHEK WAHI MAMTA BISHNOI NEHA RAINA MEGHNA AMRITA SINGH PIYUSH VERMA PIYUSH KUMAR GUPTA GINPREET KAUR HARDEEP SINGH TULI madhu GUPTA Department of Pharmaceutics School of Pharmaceutical SciencesDelhi Pharmaceutical Sciences and Research University(DPSRU)Pushp ViharNew Delhi110017India Department of Pharmaceutical Sciences Gurugram UniversityHaryana122003India Department of Life Sciences Sharda School of Basic Sciences and ResearchSharda UniversityGreater NoidaUttar Pradesh201310India Department of Biotechnology Graphic Era(Deemed to be University)DehradunUttarakhand248002India Department of Pharmacology Shobhaben Pratapbhai Patel School of Pharmacy&Technology ManagementSVKM’s NMIMSVile Parle(West)Mumbai400056India Department of Bio-Sciences and Technology Maharishi Markandeshwar Engineering CollegeMaharishi Markandeshwar(Deemed to be University)MullanaAmbala133207India

Cancer is a leading cause of death globally,with limited treatment options and several *** agents often result in toxicity which long-term conventional *** are natural constituents that are more effective in treating various diseases with less toxicity than the chemotherapeutic agents providing alternative therapeutic approaches to minimize the *** phytoconstituents act in several ways and deliver optimum effectiveness against ***,the effectiveness of phyto-formulations in the management of cancers may be constrained due to challenges related to inadequate solubility,bioavailability,and *** presents a promising avenue for transforming current cancer treatment methods through the incorporation of phytochemicals into nanosystems,which possess a range of advantageous characteristics such as biocompatibility,targeted and sustained release capabilities,and enhanced protective *** holds significant potential for future advancements in cancer ***,this review aims to provide intensive literature on diverse nanocarriers,highlighting their applications as cargos for phytocompounds in ***,it offers an overview of the current advancements in the respective field,emphasizing the characteristics that contribute to favourable outcomes in both in vitro and in vivo ***,clinical development and regulatory concerns are also discussed to check on the transformation of the concept as a promising strategy for combination therapy of phytochemicals and chemotherapeutics that could lead to cancer management in the future.

关键词： Phyto-formulations Cancer Nanocarriers Nanotechnology Clinical development

Hot deformation behavior and processing maps of Ti-15Al-12Nb alloy

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Rare Metals 2022年第7期41卷 2316-2323页

作者： Ravindranadh Bobbili Vemuri madhu Defense Metallurgical Research Laboratory Hyderabad 500058India

The isothermal hot compression tests of Ti-15Al-12Nb alloy under wide range of strain rates(0.01-10.00 s^(-1)and deformation temperatures(950,1000,1050,and 1100℃)were carried out using Gleeble-3500 thermo-simulation machine.A constitutive equation represented as a function of temperature,strain rate and true strain was developed,and the hot deformation appar-ent activation energy is calculated to be about 453 kJ·mol^(-1).By employing dynamic material model(DMM),the processing maps of Ti-15Al-12Nb alloy at various strains were *** efficiency of about 57%for power dissipation is obtained at high temperature and low strain *** to the high power dissipation efficiency and excellent processing ability in dynamic recrystallization(DRX)zone for metal material,the optimum processing conditions are selected as the temperature range of 1050-1100℃and the strain rate range of 0.01-0.10 s^(-1).Using transmission electron microscopy(TEM)studies,it is found that the dislocation density is directly associated with the value of processing *** is observed that when the processing effi-ciency is about 22%,the dislocation density is reasonably *** flow instability region occurs at strain rate of 10.00 s^(-1)with cracks,which should be avoided during hot processing to obtain the required mechanical properties.

关键词： Hot deformation Processing map Ti–15Al–12Nb