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Modelling of piping collapses and gully headcut landforms: Evaluating topographic variables from different types of DEM

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Geoscience Frontiers 2021年第6期12卷 129-146页

作者： Alireza Arabameri Fatemeh Rezaie subodh Chandra Pal Artemi Cerda Asish Saha Rabin Chakrabortty Saro Lee Department of Geomorphology Tarbiat Modares UniversityTehran 14117-13116Iran Geoscience Platform Research Division Korea Institute of Geoscience and Mineral Resources(KIGAM)124 Gwahak-ro Yuseong-guDaejeon 34132South Korea Department of Geophysical Exploration Korea University of Science and Technology217 Gajeong-ro Yuseong-guDaejeon 34113South Korea Department of Geography The University of BurdwanBardhamanWest Bengal 713104India Soil Erosion and Degradation Research Group Departament de GeografiaUniversitat de ValènciaBlasco Ibàñez2846010-ValenciaSpain

The geomorphic studies are extremely dependent on the quality and spatial resolution of digital elevation model(DEM)*** unique terrain characteristics of a particular landscape are derived from DEM,which are responsible for initiation and development of ephemeral *** the topographic features of an area significantly influences on the erosive power of the water flow,it is an important task the extraction of terrain features from DEM to properly research gully ***,topography is highly correlated with other geo-environmental factors ***,climate,soil types,vegetation density and floristic composition,runoff generation,which ultimately influences on gully ***,terrain morphometric attributes derived from DEM data are used in spatial prediction of gully erosion susceptibility(GES)*** this study,remote sensing-Geographic information system(GIS)techniques coupled with machine learning(ML)methods has been used for GES mapping in the parts of Semnan province,*** research focuses on the comparison of predicted GES result by using three types of DEM *** Land Observation satellite(ALOS),ALOS World 3D-30 m(AW3D30)and Advanced Space borne Thermal Emission and Reflection Radiometer(ASTER)in different *** further progress of our research work,here we have used thirteen suitable geo-environmental gully erosion conditioning factors(GECFs)based on the multi-collinearity *** methods of conditional inference forests(Cforest),Cubist model and Elastic net model have been chosen for modelling GES ***’s importance of GECFs was measured through sensitivity analysis and result show that elevation is the most important factor for occurrences of gullies in the three aforementioned ML methods(Cforest=21.4,Cubist=19.65 and Elastic net=17.08),followed by lithology and *** of the model’s result was performed through area under curve(AUC)and other statistical *** valid

关键词： Digital elevation model(DEM) Gully erosion susceptibility(GES) Advanced land observation satellite(ALOS) Cforest Cubist Elastic net

Comparison of ISS, NISS, and RTS score as predictor of mortality in pediatric fall

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Burns & Trauma 2017年第3期5卷 209-214页

作者： Kapil Dev Soni Santosh Mahindrakar Amit Gupta subodh Kumar Sushma Sagar Ashish Jhakal Department of Trauma Surgery and Critical Care Jai Prakash Narayan Trauma Centre AIIMS New Delhi India

Background:Studies to identify an ideal trauma score tool representing prediction of outcomes of the pediatric fall patient remains elusive. Our study was undertaken to identify better predictor of mortality in the pediatric fall patients. Methods:Data was retrieved from prospectively maintained trauma registry project at level 1 trauma center developed as part of Multicentric Project—Towards Improving Trauma Care Outcomes (TITCO) in India. Single center data retrieved from a prospectively maintained trauma registry at a level 1 trauma center, New Delhi, for a period ranging from 1 October 2013 to 17 February 2015 was evaluated. Standard anatomic scores Injury Severity Score (ISS) and New Injury Severity Score (NISS) were compared with physiologic score Revised Trauma Score (RTS) using receiver operating curve (ROC). Results:Heart rate and RTS had a statistical difference among the survivors to nonsurvivors. ISS, NISS, and RTS were having 50, 50, and 86% of area under the curve on ROCs, and RTS was statistically significant among them. Conclusions: Physiologically based trauma score systems (RTS) are much better predictors of inhospital mortality in comparison to anatomical based scoring systems (ISS and NISS) for unintentional pediatric falls.

关键词： Pediatric fall Trauma score system ISS NISS RTS

Evaluation of Energy Efficiency Performance of Heated Windows

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Energy Engineering 2022年第1期119卷 1-16页

作者： Hari Swarup Jammulamadaka Bhaskaran Gopalakrishnan subodh Chaudhari Senthil Sundaramoorthy Akash Rajesh Mehta Roseline Mostafa Energy and Mineral Engineering Pennsylvania State UniversityState CollegePA 16801USA Industrial and Management Systems Engineering West Virginia UniversityMorgantownWV 26505USA Oak Ridge National Laboratory Oak RidgeTN 37831USA

Fenestration systems are widely used across the *** is expansive research on window configurations,frames,and glazing technology,but not enough research has been published on reducing window heat loss through heat application to a *** presented study attempted to evaluate the performance of heated windows by developing an experimental setup to test a window at various temperatures by varying the power input to *** double pane window was installed in an insulated *** gradient was developed across the window by cooling one side of the window using gel-based ice *** other face of the window was heated by enabling power at different wattages through the *** temperature of the inside and outside panes,current and voltage input,and temperature of the room and box were *** data was used to calculate the apparent effective resistance of the window when not being heated *** being *** study concluded that,when window temperature was maintained close to the room temperature,the heated double pane window is effective in reducing heat loss by as much as 50%as compared to a non-heated double pane *** temperature of the window was much higher than the room temperature,the heat loss through the window increased beyond that of a non-heated *** issues encountered during the current stages of experiments are noted,and recommendations are provided for future studies.

关键词： Heated windows perimeter heating window efficiency building energy models floor heating

Gender differences,outcomes and trends among nonagenarian with atrial fibrillation:insight from National Inpatient Sample database

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Journal of Geriatric Cardiology 2021年第2期18卷 114-122页

作者： Dinesh Voruganti Ghanshyam Shantha Sushma Dugyala Alexander Bolton Ala Mohsen subodh Devabhaktuni Hakan Paydak Jawahar L Mehta Division of Cardiovascular Medicine University of Arkansas for Medical SciencesArkansasUSA Division of Cardiovascular Medicine Wake Forest Medical CenterNorth CarolinaUSA Division of Internal Medicine University of AlabamaAlabamaUSA Department of Internal Medicine Unity Point HealthIowaUSA Division of Cardiovascular Medicine Louisiana State UniversityLouisianaUSA

BACKGROUND Nonagenarians(NG),individuals aged≥90 years,constitute an increasing proportion of hospitalizations presenting with atrial fibrillation(AF).However,not much is known about demographics,clinical outcomes,and trends of ***,we analyzed data about hospitalizations and clinical outcomes among NGs with AF over ten years from 2005 to 2014 using a publically available database,the National Inpatient *** All hospitalizations and major outcomes of subjects≥90 years with a primary diagnosis of AF(ICD-9-CM code 427.31)over a ten-year period were assessed in this study by multivariate logistic regression *** There were more females than males(176,268 females,51,384 males)in this *** number of hospitalizations for AF among NG increased by 50%(17,295 in 2005 to 25,830 in 2014).Males were more likely to undergo cardioversion(6.14%of males vs.5.06%of females,P<0.0001).Over this period,in-hospital mortality declined from 3.21%in 2005 to 2.38%in 2014(P=0.0041),with higher in-hospital mortality in males(3.23%in males vs.2.76%in females,P=0.0138),mean length of hospitalization decreased from 4.53 days to 4.13 days(P<0.0001),the prevalence of congestive heart failure fell from 0.48%to 0.23%(P=0.0257),and the use of anticoagulation increased from 6.09%to 14.54%(P<0.0001).In a multivariate analysis,hospital admission on the weekend,Elixhauser comorbidity index,CHA2DS2VASc score,acute respiratory failure,and the length of hospital stay were associated with a higher risk of in-hospital *** From 2005 to 2014,AF-related hospitalizations among NGs increased,more so in in females population,mortality trends improved,rates of anticoagulation increased,and cardioversions *** the decreasing trend of in-hospital mortality since 2005,the relatively high mortality rate in males warrants further studies.

关键词： mortality fibrillation analysis.

Study of Substrate and Physico-Chemical Base Classification of the Rivers of Nepal

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Geo-Spatial Information Science 2010年第1期13卷 70-76页

作者： JHA Bibhuti Ranjan WAIDBACHER Herwig SHARMA subodh STRAIF Michael Kathmandu University Universitt für Bodenkultur

The rivers in Nepal are classified in terms of geographical regions but a more scientific classification such as on the ba-sis of morphology is clearly lacking. This study was done in 9 rivers namely Jhikhukhola of the Koshi system, Aandhikhola, Arungkhola, East Rapti, Karrakhola, Seti and main channel Narayani of the Gandaki system, and two independent systems within Nepal, Bagmati and Tinau. Among the morphologies, river bed or the substratum was taken as the main variable for the analysis which was categorized into 7 types as rocks, boulders, cobbles, pebbles, gravels, sand and silt. There were 23 sampling sites each with 2 stretches of around 100m in those rivers. The data were taken as a percentage, and to avoid biases it was observed visually by the same person for a complete year in every season. With 23 sites each with 2 stretches and 4 replicates corresponding to 4 seasons, there are altogether 184 observations, each termed as a case, that constitute this work. Canonical Discrimination Analysis (CDA) which is most suitable when the data pool is huge was applied to see if the rivers studied distinguish themselves in terms of its morphology. The result was remarkably successful and was close to the established regional classification of the rivers. This kind of river classification has great application in the utilization, conservation and restoration of the most important natural re-source of the country.

关键词： Nepal rivers morphology physico-chemical parameter river classification

Biodegradable magnesium alloys for orthopaedic applications

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Biomaterials Translational 2021年第3期2卷 214-235页

作者： Yu Lu subodh Deshmukh Ian Jones Yu-Lung Chiu School of Metallurgy and Materials University of BirminghamBirminghamUK Sandwell and West Birmingham Hospitals NHS Trust BirminghamUK

There is increasing interest in the development of bone repair materials for biomedical ***(Mg)-based alloys have a natural ability to biodegrade because they corrode in aqueous media;they are thus promising materials for orthopaedic device applications in that the need for a secondary surgical operation to remove the implant can be ***,Mg has superior biocompatibility because Mg is found in the human body in ***,Mg alloys have a low elastic modulus,close to that of natural bone,which limits stress ***,there are still some challenges for Mg-based fracture *** degradation of Mg alloys in biological fluids can be too rapid,resulting in a loss of mechanical integrity before complete healing of the bone *** order to achieve an appropriate combination of bio-corrosion and mechanical performance,the microstructure needs to be tailored properly by appropriate alloy design,as well as the use of strengthening processes and manufacturing *** review covers the evolution,current strategies and future perspectives of Mg-based orthopaedic implants.

关键词： biodegradability magnesium alloys mechanical behaviour microstructure orthopaedic application

Prevalence of excessive internet use and its correlation with associated psychopathology in 11th and 12th grade students

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General Psychiatry 2019年第2期32卷 84-91页

作者： Nitin Kumar Arvind Kumar subodh Kumar Mahto Manish Kandpal Smita Neelkanth Deshpande Parul Tanwar Department of Psychiatry Dr Ram Manohar Lohia Hospital and Post Graduate Institute of Medical Education and Research New Delhi India Department of Medicine Dr Ram Manohar Lohia Hospital and Post Graduate Institute of Medical Education and Research New Delhi India Vardhman Mahavir Medical College and Safdarjung Hospital New Delhi India

Background Globally, the number of internet users has crossed the three-billion mark, while in India users grew over 17% in the first 6 months of 2015 to 354 million. This study presented a background on internet use and the existence of excessive internet use. Aim To study the extent of internet use in 11th and 12th grade students and the psychopathology, if any, associated with excessive internet use. Methods 426 students who met the inclusion criteria were recruited from 11 th and 12th grade classes from Kendriya Vidyalaya, New Delhi, India, and were assessed by Young's Internet Addiction Test and the Strength and Difficulties Questionnaire. Results Among the 426 students, the mean internet addiction total score was 36.63 (20.78), which indicated mild level of internet addiction. 1.41%(six students) was diagnosed as excessive internet users, while 30.28% and 23.94% were classified as moderate and mild internet users, respectively. The prevalence of internet addiction between gender was 58.22% in males and 41.78% in females. While both positive (prosocial) and negative (hyperactivity, emotional, conduct and peer problem) impacts of internet use were reported by students, in the current study excessive use of internet had a negative impact on students' lives as compared with positive impact, which was statistically significant (p<0.0001). Conclusion Excessive internet use led to abnormal behaviours which cause negative consequences to users. Early diagnosis of risk factors related to excessive internet use, provides education about responsible use and supervision of students by family members.

关键词： internet psychopathology inclusion criteria

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基于复合分布的混合交通时间间隔模型

交通运输系统工程与信息 2013年第3期13卷 91-98页

作者： DUBEY subodh Kant PONNU Balaji ARKATKAR Shriniwas S Birla技术与科学学院土木工程系印度拉贾斯坦邦皮拉尼-333031

非复合分布模型可用于分析交通流量达1 800 vph的车辆时间间隔,但并不适用于更高交通流量的情况.为解决此类问题,提出了一些基于复合分布的模型.但这类模型的参数标定过程复杂,在一定程度上限制了其应用.针对流量介于1 900 vph到4 100 ... 详细信息

非复合分布模型可用于分析交通流量达1 800 vph的车辆时间间隔,但并不适用于更高交通流量的情况.为解决此类问题,提出了一些基于复合分布的模型.但这类模型的参数标定过程复杂,在一定程度上限制了其应用.针对流量介于1 900 vph到4 100 vph的车辆时间间隔,本文分别采用5种复合分布模型进行分析,即指数-极值分布(EEV)、对数正态-极值分布(LEV)、威布尔-极值分布(WEV)、威布尔-对数正态分布(WLN)和指数-对数正态分布(ELN).然后采用两种方法进行拟合优度检验——基于累计函数分布检验(CDF)和双样本(Cramer-von Mises)&K样本(Anderson-Darling)检验.结果表明,在分析车辆时间间隔方面,威布尔-极值分布(WEV)是最佳的复合分布模型,在Cramer-von Mises检验和K样本Anderson-Darling检验中均具有良好的一致性.

关键词：城市交通混合交通车辆时间间隔 AD检验 Cramer-von Mises检验

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基于统计分析的混合交通间隙模型(英文)

交通运输系统工程与信息 2012年第6期12卷 72-84页

作者： DUBEY subodh Kant PONNU Balaji ARKATKAR Shriniwas S Birla技术与科学学院土木工程系印度拉贾斯坦邦皮拉尼-333031

车辆间隙定义为到达路段某特定点相邻车辆的间隔.本文研究了非双车道异质混合交通情形下的车辆间隙模型,此类交通流在诸如印度等一些发展中国家普遍存在.其特征是具有大量'零间隙'的情况,这主要由给定车道宽度下车辆同时到达的情形所致... 详细信息

车辆间隙定义为到达路段某特定点相邻车辆的间隔.本文研究了非双车道异质混合交通情形下的车辆间隙模型,此类交通流在诸如印度等一些发展中国家普遍存在.其特征是具有大量'零间隙'的情况,这主要由给定车道宽度下车辆同时到达的情形所致.其另一特征是较大车头时距带来的尾区数据量偏大.然而,一些学者运用轻尾分布对车辆间隙进行建模并得到了满意的结果.原因主要是:(1)尾区数据融入单个面元;(2)分布拟合时卡方检验等方法具有一定的局限性.此外,一些学者还建议对同一范围的交通流数据采用其他一些分布进行拟合,产生了分布选择的分歧.同时,可表征任何分布拟合状况的面元在间隙模型中的作用逐渐减小.因此,本文就以上问题对现有间隙模型的研究进行进一步和标准化的分析.本文还分析了两种具有较好尾模型特性的广义Pareto分布(GP)、广义极值分布(GEV)、其他几种传统分布对550 vph至4 100 vph流量范围内车辆间隙建模,且使用基于区域和基于距离检验的方法进行分布拟合检验.结果表明,无论使用哪种检验方法,广义Pareto分布对于大于1 500 vph流量的间隙数据在整体和尾区均能得到较好的拟合效果.广义极值分布在使用基于区域的检验方法时对于大于1 500 vph流量的间隙数据产生较好的拟合效果.

关键词：公路运输车辆间隙异质交通流面元大小 K-S检验 A-D检验