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Geoscience Frontiers 2015年第6期6卷 927-946页

作者： Suvendu Roy abhay sankar sahu Department of Geography University of Kalyani

The style of active tectonic on the deformation and characterization of fluvial landscape has been investigated on three typical skrike-slip fault zones of the Ajay-Damodar Interfluve（ADI） in Eastern India through field mapping,structural analysis and examination of digital topography（ASTER-30 m）,multispectral imageries,and Google Earth images,Channel morphology in Quaternary sediment is more deformed than Cenozoic lateritic tract and igneous rock system by the neotectonic activities,The structural and lithological controls on the river system in ADI region are reflected by distinct drainage patterns,abrupt change in flow direction,offset river channels,straight river lines,ponded river channel,marshy lands,sag ponds,palaeo-channels,alluvial fans,meander cutoffs,multi-terrace river valley,incised compressed meander,convexity of channel bed slope and knick points in longitudinal profile,Seven morphotectonic indices have been used to infer the role of neotectonic on the modification of channel morphology,A tectonic index map for the ADI region has been prepared by the integration of used morphotectonic indices,which is also calibrated by Bouguer gravity anomaly data and field investigation.

关键词： Active tectonic Skrike-slip fault Channel morphology Morphotectonic indices Neotectonic map

Effectiveness of basin morphometry, remote sensing, and applied geosciences on groundwater recharge potential mapping： a comparative study within a small watershed

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Frontiers of Earth Science 2016年第2期10卷 274-291页

作者： Suvendu ROY abhay sankar sahu Department of Geography University of Kalyani Kalyani Nadia-741235 West Bengal India

A multidisciplinary approach using the inte- grated field of geosciences （e.g., geomorphology, geotec- tonics, geophysics, and hydrology） is established to conduct groundwater recharge potential mapping of the Kunur River Basin, India. The relative mean error （RME） calculation of the results of three applied techniques and water table data from twenty-four observation wells in the basin over the 2000-2010 period are presented. Nine sub- basins were identified and ranked for the RME calculation, where the observation wells-based ranking was taken as standard order for comparison. A linear model has been developed using six factors （drainage density, surface slope, ruggedness index, lineament density, Bouguer gravity anomaly, and potential maximum water retention capacity） and a grid-wise weighted index. In a separate comparative approach, the sub-basin and grid-wise analyses have been conducted to identify the suitable spatial unit for watershed level hydrological modeling.

关键词： groundwater basin morphometry SCS curvenumber geosciences geoinforrnatics

Effect of land cover on channel form adjustment of headwater streams in a lateritic belt of West Bengal(India)

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International Soil and Water Conservation Research 2016年第4期4卷 267-277页

作者： Suvendu Roy abhay sankar sahu Department of Geography University of KalyaniKalyaniNadia 741235West BengalIndia

Present work is exploring the influence of land cover on channel morphology in 34 headwater catchments of the lateritic belt of West ***-parametric tests(Mann-Whitney U and Kruskal-Wallis)and multivariate analysis(Principal Component Analysis and Canonical Discriminant Function models)have successfully differentiated the performance of land cover on channel morphology adjustment among the three groups of headwater streams(forested,transitional,and agricultural)on the Kunur River Basin(KRB).Spatial Interpolation Techniques reveal that intense land-use change,particularly forest conversion to agricultural land,is significantly increasing channel widths(269%)and cross-section area(78%),whereas agricultural channels become shallower(40%)than would be predicted from forested *** with the dominance of forest and agricultural land are classified as‘C′and‘B′types of streams respectively,as per Rosgen's Stream Classification ***,the work claimed that transitional stream group is the definitive area to exaggerate the river restoration plan to stabilize the anthropogenic deformation on channel morphology.

关键词： Headwater streams Land cover Channel Morphology Canonical discriminant function Spatial interpolation techniques

Spatiotemporal dynamics of land use/land cover(LULC)changes and its impact on land surface temperature:A case study in New Town Kolkata,eastern India

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Regional Sustainability 2024年第2期5卷 26-48页

作者： Bubun MAHATA Siba sankar sahu Archishman SARDAR Laxmikanta RANA Mukul MAITY Department of Geography Ravenshaw UniversityCuttack753003India Department of Geography Sri Krushna Chandra Gajapati(Autonomous)CollegeParalakhemundi761200India

Rapid urbanization creates complexity,results in dynamic changes in land and environment,and influences the land surface temperature(LST)in fast-developing *** this study,we examined the impact of land use/land cover(LULC)changes on LST and determined the intensity of urban heat island(UHI)in New Town Kolkata(a smart city),eastern India,from 1991 to 2021 at 10-a intervals using various series of Landsat multi-spectral and thermal *** study used the maximum likelihood algorithm for image classification and other methods like the correlation analysis and hotspot analysis(Getis–Ord Gi^(*) method)to examine the impact of LULC changes on urban thermal *** study noticed that the area percentage of built-up land increased rapidly from 21.91%to 45.63%during 1991–2021,with a maximum positive change in built-up land and a maximum negative change in sparse *** mean temperature significantly increased during the study period(1991–2021),from 16.31℃to 22.48℃in winter,29.18℃to 34.61℃in summer,and 19.18℃to 27.11℃in *** result showed that impervious surfaces contribute to higher LST,whereas vegetation helps decrease *** ecological status has been found in built-up land,and excellent ecological status has been found in vegetation and water *** hot spot and cold spot areas shifted their locations every decade due to random LULC *** after New Town Kolkata became a smart city,high LST has been ***,this study indicated that urbanization and changes in LULC patterns can influence the urban thermal environment,and appropriate planning is needed to reduce *** study can help policy-makers create sustainable smart cities.

关键词： Urbanization Land use/land cover (LULC)changes Land surface temperature Urban heat island Hotspot analysis Smart city

Palaeodepositional environment,implications of Glossopteris flora,and organic matter characteristics from the Lower Permian,Karo Open Cast Mine,East Bokaro Coalfield,Damodar Basin,India

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Journal of Palaeogeography 2024年第3期13卷 528-546页

作者： sankar Suresh Kumar Pillai Rose Ann Sebastian Runcie Paul Mathews Srikanta Murthy Anju Saxena Mrutyunjaya Sahoo Suraj Kumar sahu Gulshan Kumar Dhingra Birbal Sahni Institute of Palaeosciences 53 University RoadLucknow-226007UPIndia Academy of Scientific and Innovative Research(AcSIR) Ghaziabad-201002India Department of Geology School of Earth Science SystemsCentral University of KeralaKasaragod-671316KeralaIndia Department of Geology Ravenshaw UniversityCuttack-753003OdishaIndia Department of Botany Sri Dev Suman Uttarakhand UniversityUttarakhand-249145India

The present study deals with the Early Permian floral diversity,palaeoenvironment,palaeoclimate and depositional setting using a multiproxy approach that includes morphotaxonomy,palynology,and organic geochemistry of Karo OCM(Open Cast Mine),East Bokaro Coalfield,Damodar Gondwana Basin,*** Permian sediments of Peninsular India are widely regarded as fluvial,along with some marine *** macroplant fossil assemblage exhibits the presence of Glossopteridales,comprising Glossopteris,Gangamopteris,and Vertebraria,as well as Coniferales,which includes *** palynological assemblage encompasses the dominance of the striate bisaccate pollen Faunipollenites *** the subdominance of the non-striate bisaccate pollen Scheuringipollenites *** glossopterid *** megafloral and palynofloral assemblage confirms the biostratigraphical age to be Late Barakar palynoflora of Kungurian *** studied morphological characteristics,including small to large Glossopteris leaves exhibiting a lanceolate shape,acute apices,and acute cuneate or tapering bases,as well as entire margins with narrower lamina and narrow meshes,suggest the existence of a dense forest with the prevalence of a warm and humid climate during their *** organic geochemical characterization based on functional group and biomarker analyses reveals the diagenetic effects on organic *** symmetric(~2865-2855 cm^(-1))and asymmetric stretching(~2930-2910 cm^(-1))peaks are identifiable in coal samples,whereas they are absent in carbonaceous *** A-factor vs.C-factor plot suggests that the kerogen type is type Ⅲ,which can generate mainly gaseous *** vitrinite reflectance studies(R_(r) av.1.1%)show increased maturity of the samples,which is supported by the n-alkane distribution pattern and the absence of hopane *** Indian floral assemblages in contemporary of southern Gondwana continents reveal a stronger inclination/affinity with th

关键词： Glossopteris Palynomorph FTIR GCMS Gondwana Permian Palaeoclimate

Wooden foreign body impalement through the right shoulder region–an unusual penetrating injury:A case report

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World Journal of Orthopedics 2022年第12期13卷 1064-1068页

作者： abhay Harsh Kerketta Ritesh Kumar Seelora sahu Jayanta Kumar Laik Manoj Kumar Rajak Department of Joint Replacement and Orthopaedics Tata Main HospitalSinghbhum 831001JharkhandIndia Department of Anaesthesiology Tata Main HospitalJamshedpur 831001JharkhandIndia

BACKGROUND Impalement of the body is a rare injury and comes with varied *** is no set classification or defined protocols for managing this *** case report aims to create awareness among trauma surgeons about unusual presentation and management of such *** SUMMARY A 45-year-old man presented to the emergency department with a sharp penetrating wooden plank at right clavicular region between the neck and shoulder following a road traffic *** vehicle had crashed into a roadside wooden hut,thus causing an impalement *** was meticulously worked up and taken to emergency *** wooden plank was removed and the wound healed ***,he had fairly good shoulder function and was able to return back to work *** Each impalement injury brings in challenges in management as no two cases are the *** varied presentation and risks involved should be known to medical professionals handling the *** multidisciplinary team approach is needed for successful outcome.

关键词： Impaling Wooden Foreign body Sharp object Trunk Case report

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经济宽带通信用的理想光纤

光通信研究 2005年第6期 44-47页

作者： sahu H R Shashi Kant Sudipta Bhaumik abhay Arora 印度斯德雷特光科技有限公司印度马哈拉斯特拉奥兰加巴德431136

宽带指的是大容量、高速率(一般双向的速率超过256 kb it/s),因特网或网络的连接是通过比普通铜电话线的带宽高得多的同轴电缆或光缆实现的。宽带信道可以同时传输语音、图像和数据。现在有许多不同的技术适用于宽带通信,如铜线可用于... 详细信息

宽带指的是大容量、高速率(一般双向的速率超过256 kb it/s),因特网或网络的连接是通过比普通铜电话线的带宽高得多的同轴电缆或光缆实现的。宽带信道可以同时传输语音、图像和数据。现在有许多不同的技术适用于宽带通信,如铜线可用于数字用户线(DSL)技术,光纤技术可用于光纤到户(FTTH),有线电视网络和无线技术可用于W iF i和W i-M ax。光纤技术可以为采用FTTH网络(即光纤到最后一英里)的用户提供宽带业务。在城域网和接入网中使用理想光纤(ITUTG.652D)的特点是,理想光纤可以提供宽带业务。究其原因是低水峰ITUTG.652D在1 383±3 nm具有低衰减和小偏振模色散(PMD),从而满足和超过宽带网络对理想光纤的性能要求。

关键词：经济宽带通信理想光纤