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Rift-associated ultramafic lamprophyre(damtjernite) from the middle part of the Lower Cretaceous(125 Ma) succession of Kutch,northwestern India: Tectonomagmatic implications

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Geoscience Frontiers 2018年第6期9卷 1883-1902页

作者： rohit pandey N.V.Chalapathi Rao Prashant Dhote Dinesh PANDit A.K.Choudhary Samarendra Sahoo B.Lehmann Electron Probe Micro Analyzer Laboratory Department of Geology Centre of Advanced Study Banaras Hindu University Bhumi Geoservices 1 & 2 Maa Bamleshwari Nagar Godhani Railway Institute Instrumentation Centre Indian Institute of Technology Mineral Resources Technical University of Clausthal

Mineralogical,geochemical and isotopic(Sr and Nd) studies on the recently reported ca. 124 Ma'anorogenic lamproite' dyke from the Palanpur area, Kutch seismogenic rift zone, northwestern India, are presented. We propose a new classification for the dyke as a damtjernite(ultramafic lamprophyre; UML)based on its porphyritic-panidiomorphic texture, abundance of phlogopite, presence of nepheline in the groundmass, and the composition of liquidus phases such as olivine, phlogopite, magnetite, and clinopyroxene(diopside). The Palanpur UML is primitive(Mg# =74-77),silica-undersaturated(SiO_2<40 wt.%),potassic to slightly sodic in nature, and is strikingly similar to the ～69 Ma UML dykes and sills of the Tethyan Indus suture zone, which are considered as the earliest yet known manifestations of the Deccan Large Igneous Province(LIP). Bulk-rock(^(87)Sr/^(86)Sr)_i(0.70460-0.70461) and ε_(N)d(t)(+2.56 to-0.69) of the Palanpur UML signify derivation from a slightly depleted mantle source similar to that of asthenospheric magmas such as OIB. This is further attested to by the high incompatible trace element ratios(viz., La/Ba, Nb/U, Nb/La and Ta/Yb) that are typical of plume-type magmas. However, the Neoproterozoic T_(DM) depleted mantle Nd model ages( ～655-919 Ma) also necessitate some involvement of a lithospheric mantle component in its genesis. High bulk-rock Fe_2 O_3~t and TiO_2 contents require the involvement of a fertile peridotitic mantle source, whereas high La/Yb(60-80) implies a control by residual garnet. Higher Rb/Sr and lower Ba/Rb suggest phlogopite as a residual phase and high Nb and lower La/Sm favour carbonatite, rather than silicate melt as metasomatising agent. Low degrees of partial melting of a primitive garnet lherzolite mantle can account for the observed REE patterns in the Palanpur UML. The Palanpur UML shares a temporal similarity to the Kerguelen plume-derived Rajmahal basalts and associated alkaline rocks from the eastern India. The tectonomagmatic

关键词： Tectonomagmatism Cretaceous Ultramafic lamprophyre Rift Kutch India

Diagnosis and Detection of Alzheimer’s Disease Using Learning Algorithm

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Big Data Mining and Analytics 2023年第4期6卷 504-512页

作者： Gargi Pant Shukla Santosh Kumar Saroj Kumar pandey rohit Agarwal Neeraj Varshney Ankit Kumar the Department of Management Doon Business SchoolDehradun 248001India. Jaipuria Institute of Management Jaipur 302033India Department of Computer Engineering and Apllications GLA UniversityMathura 281406India.

In Computer-Aided Detection(CAD)brain disease classification is a vital ***’s Disease(AD)and brain tumors are the primary reasons of *** studies of these diseases are carried out by Magnetic Resonance Imaging(MRI),Positron Emission Tomography(PET),and Computed Tomography(CT)scans which require expertise to understand the *** disease is the most prevalent in the elderly and can be fatal in its later *** result can be determined by calculating the mini-mental state exam score,following which the MRI scan of the brain is *** from that,various classification algorithms,such as machine learning and deep learning,are useful for diagnosing MRI ***,they do have some limitations in terms of *** paper proposes some insightful pre-processing methods that significantly improve the classification performance of these MRI ***,it reduced the time it took to train the model of various pre-existing learning algorithms.A dataset was obtained from Alzheimer’s Disease Neurological Initiative(ADNI)and converted from a 4D format to a 2D *** clipping,grayscale image conversion,and histogram equalization techniques were used to pre-process the *** pre-processing,we proposed three learning algorithms for AD classification,that is random forest,XGBoost,and Convolution Neural Networks(CNN).Results are computed on dataset and show that it outperformed with exiting work in terms of accuracy is 97.57%and sensitivity is 97.60%.

关键词： alzheimer’s disease deep learning random forest XGBoost

Yq AZF microdeletions in male infertility:An update on the phenotypic spectrum,epidemiology and diagnostics

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Asian pacific Journal of Reproduction 2021年第5期10卷 203-214页

作者： Awanish Jaiswal Anurag pandey Mamta Tiwari Akhtar Ali rohit Sharma Department of Vikriti Vigyan Faculty of AyurvedaInstitute of Medical SciencesBanaras Hindu UniversityVaranasiU.P.India Department of Swasthavritta and Yoga Faculty of AyurvedaInstitute of Medical SciencesBanaras Hindu UniversityVaranasiU.P.India Centre for Genetic Disorders Institute of ScienceBanaras Hindu UniversityVaranasi U.P.India Department of Rasa Shastra and Bhaishajya Kalpana Faculty of AyurvedaInstitute of Medical SciencesBanaras Hindu UniversityVaranasiU.P.India

According to the latest data,globally 15%of couples have infertility and male infertility contributes to 10%of all *** can be caused by certain biological changes in the gonads and the reproductive system like azoospermia,oligospermia,asthenospermia,teratozoospermia and *** causes of azoospermia include chromosomal abnormalities,Y chromosome microdeletions and deletion or other mutations of Y-linked *** maximum number of the genes are located in the azoospermia factor region of the long arm(Yq)of the Y chromosome.Y chromosome microdeletion is known as the second major genetic cause of spermatogenetic *** article aims to review the latest updates on the involvement of Yq microdeletions in male *** diagnostics,prevalence and phenotypic spectrum related to Yq gene microdeletions are discussed.

关键词： Azoospermia factor AZF Male infertility Y chromosome microdeletion Yq

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游走脾:手术之謎

Gastroenterology Report 2017年第3期5卷 241-243,I0003页

作者： Ashok Kumar Puranik rohit Mehra Sushila Chauhan Rahul pandey Department of Surgery Command HospitalPuneMaharashtraIndia Department of Surgery Armed Forces Medical CollegePuneMaharashtraIndia

Wandering spleen,also referred to as‘ptotic spleen’,is a rare clinical condition characterized by splenicmigration form its normal left hypochondrial position to any other abdominal or pelvic *** themultifactorial etiologies proposed,laxity of the spleen’s primary supporting ligaments is themost agreed-upon *** present one rare case of wandering spleen in an 11-year-old girl who presented with recurrent abdominal pain with no localizing *** abdominal examination revealed an intra-abdominal left iliac fossa lump with restrictedmobility,which was confirmed as a wandering spleen by abdominal sonography and contrast-enhanced computed ***,an infarcted spleen was encountered with tortuous,elongated,torsional splenic pedicle and a single dense adhesive band with descending *** was offered to the ***-operatively,the patient is healthy and symptom free at one-year *** rare clinical diagnosis of this condition,particularly in the paediatric age-group,makes it an enigma for the surgical world.

关键词： wandering spleen splenic ligaments torsion