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Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1199-1208 doi: 10.1007/s11709-021-0749-1

Abstract: Shear wave velocity ( V S) is a key parameter in such analysis, although the economyanalysis to estimate the value of V S.Further, the average shear wave velocity of the top 30 m soil cover ( V S30) is estimatedThe scattering nature of the V S values estimated using different V S S30 using general and soil-specific correlations.

Keywords： uncertainties     V S– N correlations     V S30     SPT data     statistical    

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Exergy analysis and simulation of a 30MW cogeneration cycle

Nikhil Dev, Samsher, S. S. Kachhwaha, Rajesh Attri

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 169-180 doi: 10.1007/s11465-013-0263-9

Abstract: inlet air temperature (IAT) and water pressure at heat recovery steam generator (HRSG) inlet on the 30

Keywords： Cogeneration cycle     air compressor     HRSG     gas turbine     regenerator     CR     IAT    

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Statistic and review of China’s earthquake prediction score

Gao Jianguo

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 129-131

Abstract: prediction could not be denied only because of failure in Wenchuan Earthquake prediction.China's

Keywords： earthquake     earthquake prediction     nearly 30 years’earthquake prediction statistics in china    

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Effect of exhaust gas recirculation and ethyl hexyl nitrate additive on biodiesel fuelled diesel engine for the reduction of NO

S. R MURTHY, V. V. SUBBARAO, K. Vijaya KUMAR

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 304-310 doi: 10.1007/s11708-012-0195-9

Abstract: Cetane improvers reduce the ignition delay, which in turn reduces the combustion temperatures thereby reduce NO emissions. Exhaust gas recirculation (EGR) proved to be an effective way to reduce the NO emissions. In this present experimental work, a combination of exhaust gas recirculation and cetane improver ethyl hexyl nitrate (EHN) is used to investigate the performance and exhaust emissions of a single cylinder four stroke naturally aspirated direct injection and air cooled diesel engine. Test results show that the brake thermal efficiency increases with the increase in the percentage of EGR which is accompanied by a reduction in brake specific fuel consumption and exhaust gas temperatures, and that bio-diesel with cetane improver under 20% EGR reduces NO emissions by 33% when compared to baseline fuel without EGR. However carbon monoxide (CO), hydro carbon (HC) and smoke emissions increase with an increase in percentage of EGR.

Keywords： additive     exhaust gas recirculation (EGR)     emissions     ethyl hexyl nitrate (EHN)     performance    

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Statistical modeling of radiolytic (

S. Muthu Iswarya, B. Nirkayani, A. Kavithakani, V. C. Padmanaban

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 3, doi: 10.1007/s11783-019-1126-3

Abstract:

Linear, interactive and quadratic effects of process parameters were studied.

Degradation of Ofloxacin (Ofx) was related with G value of irradiation process.

The synergistic effect of H2O2 on lower dose of g-irradiation was established.

The process follows pseudo first order with dose constant (d = 0.232 kGy–1).

Keywords： Ofloxacin     Gamma irradiation     Face centered central composite design     Reaction kinetics     Gas Chromatography-Mass spectrum    

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Epidemiological studies of women under age 30 infected with human papillomavirus

Zhihua LIU MD, Qing LI BM, Weihong LI BM,

Frontiers of Medicine 2009, Volume 3, Issue 4,   Pages 459-462 doi: 10.1007/s11684-009-0084-8

Abstract: this paper was to investigate the prevalence of human papilloma virus (HPV) infection in women under 3013.40%) and one case of pathological diagnosis≥CIN I (0.34%), and there were 1761 cases in the 30&The HPV-positive rate of 22―29-year-old age group was higher than that of 30―60-year-oldThe cases in 30―60-year-old age group were divided into five age sub-groups, and the HPV-positiveFor many young women below the age of 30 who were infected with high-risk HPV were one-off infections

Keywords： cervical cancer     human papilloma virus     cervical intraepithelial neoplasia    

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Perioperative management for parturients with pulmonary hypertension: experience with 30 consecutive

Lulu Ma, Wei Liu, Yuguang Huang

Frontiers of Medicine 2013, Volume 7, Issue 3,   Pages 395-395 doi: 10.1007/s11684-013-0289-8

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Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

Himanshu PATHAK,Akhilendra SINGH,I.V. SINGH,S. K. YADAV

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 359-382 doi: 10.1007/s11709-015-0304-z

Abstract: This paper deals with the fatigue crack growth simulations of three-dimensional linear elastic cracks by XFEM under cyclic thermal load. Both temperature and displacement approximations are extrinsically enriched by Heaviside and crack front enrichment functions. Crack growth is modelled by successive linear extensions, and the end points of these linear extensions are joined by cubic spline segments to obtain a modified crack front. Different crack geometries such as planer, non-planer and arbitrary spline shape cracks are simulated under thermal shock, adiabatic and isothermal loads to reveal the sturdiness and versatility of the XFEM approach.

Keywords： 3-D cracks     fatigue life     Paris law     thermal load     XFEM    

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Response in piled raft foundation of tall chimneys under along-wind load incorporating flexibility of soil

JAYALEKSHMI,S.V. JISHA,R. SHIVASHANKAR

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3,   Pages 307-322 doi: 10.1007/s11709-015-0288-8

Abstract: chimneys were assumed to be located in terrain category 2 and subjected to a maximum wind speed of 50 m/s

Keywords： finite element method     piled raft     tall chimney     soil-structure interaction     along-wind load    

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Fault diagnosis of spur gearbox based on random forest and wavelet packet decomposition

Diego CABRERA,Fernando SANCHO,René-Vinicio SÁNCHEZ,Grover ZURITA,Mariela CERRADA,Chuan LI,Rafael E.VÁSQUEZ

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 277-286 doi: 10.1007/s11465-015-0348-8

Abstract: The vibration signal’s condition parameters are first extracted by applying the wavelet packet

Keywords： fault diagnosis     spur gearbox     wavelet packet decomposition     random forest    

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Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM

S. SHEDBALE,I. V. SINGH,B. K. MISHRA

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 420-440 doi: 10.1007/s11709-015-0305-y

Abstract: In this paper, elasto-plastic XFEM simulations have been performed to evaluate the fatigue life of plane crack problems in the presence of various defects. The stress-strain response of the material is modeled by Ramberg-Osgood equation. The von-Mises failure criterion has been used with isotropic hardening. The -integral for two fracture modes (mode-I and mode-II) is obtained by decomposing the displacement and stress fields into their symmetric and antisymmetric parts, then individual stress intensity factors are extracted from -integral. The fatigue life obtained by EPFM is found quite close to that obtained by LEFM.

Keywords： XFEM     von-Mises yield criterion     isotropic hardening     fatigue crack growth     J-integral    

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Opportunities and Challenges in Deep Mining: A Brief Review

Ranjith,Jian Zhao,Minghe Ju,Radhika V. S. De Silva,Tharaka D. Rathnaweera,Adheesha K. M. S. Bandara

Engineering 2017, Volume 3, Issue 4,   Pages 546-551 doi: 10.1016/J.ENG.2017.04.024

Abstract:

Mineral consumption is increasing rapidly as more consumers enter the market for minerals and as the global standard of living increases. As a result, underground mining continues to progress to deeper levels in order to tackle the mineral supply crisis in the 21st century. However, deep mining occurs in a very technical and challenging environment, in which significant innovative solutions and best practice are required and additional safety standards must be implemented in order to overcome the challenges and reap huge economic gains. These challenges include the catastrophic events that are often met in deep mining engineering: rockbursts, gas outbursts, high in situ and redistributed stresses, large deformation, squeezing and creeping rocks, and high temperature. This review paper presents the current global status of deep mining and highlights some of the newest technological achievements and opportunities associated with rock mechanics and geotechnical engineering in deep mining. Of the various technical achievements, unmanned working-faces and unmanned mines based on fully automated mining and mineral extraction processes have become important fields in the 21st century.

Keywords： Deep mining     Rock mechanics     Rockburst     In situstresses     Mining automation    

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Spatial targeting evaluation of energy and environmental performance of waste-to-energy processing

Petar S. Varbanov, Timothy G. Walmsley, Yee V. Fan, Jiří J. Klemeš, Simon J. Perry

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 731-744 doi: 10.1007/s11705-018-1772-1

Abstract:

Waste-to-energy supply chains are important potential contributors to minimising the environmental impacts of municipal solid waste by reducing the amounts of waste sent to landfill, as well as the fossil fuel consumption and environmental footprints. Accounting for the spatial and transport properties of the waste-to-energy supply chains is crucial for understanding the problem and improving the supply chain designs. The most significant challenge is the distributed nature of the waste generation and the household energy demands. The current work proposes concepts and a procedure for targeting the size of the municipal solid waste collection zone as the first step in the waste-to-energy supply chains synthesis. The formulated concepts and the provided case study reveal trends of reducing the net greenhouse gas savings and energy recovery by increasing the collection zone size. Population density has a positive correlation with the greenhouse gas saving and energy recovery performance. For smaller zone size the energy recovery from waste approaches and in some cases may surpass the energy spent on waste transportation. The energy recovery and greenhouse gas savings remain significant even for collection zones as large as 200 km2. The obtained trends are discussed and key directions for future work are proposed.

Keywords： waste-to-energy     supply chain optimisation     GHG savings     energy recovery ratio    

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Controlled drug delivery systems: the next 30 years

Yeonhee YUN,Byung Kook LEE,Kinam PARK

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 276-279 doi: 10.1007/s11705-014-1426-x

Abstract: Advances in the next 30 years will be most accelerated by starting open dialogues without any preconceived

Keywords： drug delivery     history     formulation barriers     nanotechnology     clinical product    

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Characterization and seasonal distribution of microplastics in the nearshore sediments of the south-east coast of India, Bay of Bengal

Sambandam , S. K. Sivadas , T.V. Ramana Murthy

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 1,   Pages 10-10 doi: 10.1007/s11783-021-1444-0

Abstract:

In view of increasing Microplastics (MPs) contamination in the marine environment and dearth of baseline data, a study was conducted on the abundance, characterization, and seasonal distribution of MPs in the nearshore sediments of the south-east coast of India. Sediment samples (n = 130) were collected at a distance of 1 km and 10 km from the shore region at varying depths (8–45 m) along the Chennai to Puducherry coast (165 km stretch), representing two seasons, i.e., south-west (July 2019 and July 2020) and north-east (January 2020) monsoons. The average abundance of MPs at the 22 offshore sites along the Chennai to Puducherry coast varied from 9±4.3 to 19±12.9 particles/50 g dry weight, in July 2019 and January 2020, respectively. July 2020 had an average abundance of 10±4.5 particles/50 g dry weight. Spatially, high levels of MPs were found at 1km stations and transects in proximity to the river inlets, and temporally, the north-east month recorded the maximum concentration. The dominant morphotype was the filament, and the major polymers were polyethylene and polypropylene. Scanning Electron Microscope (SEM) images revealed the surface irregularity and degradation of MPs due to weathering. The study highlights that high sediment contamination by MPs occurs during heavy rainfall and accumulates closer to river inlets. Eventually, this study suggests that appropriate management of plastic wastes on the landside will reduce MP contamination in the marine environment.

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Title Author Date Type Operation

Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

Journal Article

Exergy analysis and simulation of a 30MW cogeneration cycle

Nikhil Dev, Samsher, S. S. Kachhwaha, Rajesh Attri

Journal Article

Statistic and review of China’s earthquake prediction score

Gao Jianguo

Journal Article

Effect of exhaust gas recirculation and ethyl hexyl nitrate additive on biodiesel fuelled diesel engine for the reduction of NO

S. R MURTHY, V. V. SUBBARAO, K. Vijaya KUMAR

Journal Article

Statistical modeling of radiolytic (

S. Muthu Iswarya, B. Nirkayani, A. Kavithakani, V. C. Padmanaban

Journal Article

Epidemiological studies of women under age 30 infected with human papillomavirus

Zhihua LIU MD, Qing LI BM, Weihong LI BM,

Journal Article

Perioperative management for parturients with pulmonary hypertension: experience with 30 consecutive

Lulu Ma, Wei Liu, Yuguang Huang

Journal Article

Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

Himanshu PATHAK,Akhilendra SINGH,I.V. SINGH,S. K. YADAV

Journal Article

Response in piled raft foundation of tall chimneys under along-wind load incorporating flexibility of soil

JAYALEKSHMI,S.V. JISHA,R. SHIVASHANKAR

Journal Article

Fault diagnosis of spur gearbox based on random forest and wavelet packet decomposition

Diego CABRERA,Fernando SANCHO,René-Vinicio SÁNCHEZ,Grover ZURITA,Mariela CERRADA,Chuan LI,Rafael E.VÁSQUEZ

Journal Article

Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM

S. SHEDBALE,I. V. SINGH,B. K. MISHRA

Journal Article

Opportunities and Challenges in Deep Mining: A Brief Review

Ranjith,Jian Zhao,Minghe Ju,Radhika V. S. De Silva,Tharaka D. Rathnaweera,Adheesha K. M. S. Bandara

Journal Article

Spatial targeting evaluation of energy and environmental performance of waste-to-energy processing

Petar S. Varbanov, Timothy G. Walmsley, Yee V. Fan, Jiří J. Klemeš, Simon J. Perry

Journal Article

Controlled drug delivery systems: the next 30 years

Yeonhee YUN,Byung Kook LEE,Kinam PARK

Journal Article

Characterization and seasonal distribution of microplastics in the nearshore sediments of the south-east coast of India, Bay of Bengal

Sambandam , S. K. Sivadas , T.V. Ramana Murthy

Journal Article