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Journal of shipping and Ocean Engineering 2016年第4期6卷 241-254页

作者： s. Ishwarya M. Arockiasamy r. senthil Division of structural Engineering Department of Civil Engineering Anna University Chennai India Department of Civil Environmental and Geomatics Engineering Florida Atlantic University U.S.A.

In this study, inelastic nonlinear pushover analysis is performed on a 3-D model of a jacket-type offshore platform for the North sea conditions. The structure＇ is modelled, analyzed and designed using finite element software sACs （structural analysis computer system）. The behavior of jackets with different bracing systems under pushover analysis is examined. Further, by varying the leg batter values of the platform, weight optimization is carried-out. soil-structure interaction effect is considered in the analyses and the results are compared with the hypothetical fixed-support end condition. static and dynamic pushover analyses are performed by using wave and seismic loads respectively. From the analyses, it is found that the optimum leg batter varies between 15 to 16 and 2% of weight saving is achieved. Moreover, it has been observed that the type of bracing does not play a major role in the seismic design of jacket platform considering the soil-structure interaction.

关键词： Fixed offshore jacket platform pushover analysis seismic analysis leg batter optimization sACs.

Optimal analytical and numerical approximations to the(un)forced(un)damped parametric pendulum oscillator

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Communications in Theoretical Physics 2022年第10期74卷 16-29页

作者： Haifa A Alyousef M r Alharthi Alvaro H salas s A El-Tantawy Department of physics College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia Department of Mathematics and statistics College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Mathematics and statistics Universidad Nacional de ColombiaFIZMAKO Research GroupSede ManizalesColombia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt research Center for Physics(rCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

The(un)forced(un)damped parametric pendulum oscillator(PPO)is analyzed analytically and numerically using some simple,effective,and more accurate *** the first technique,the ansatz method is employed for analyzing the unforced damped PPO and for deriving some optimal and accurate analytical approximations in the form of angular Mathieu *** the second approach,some approximations to(un)forced damped PPO are obtained in the form of trigonometric functions using the ansatz *** the third approach,He’s frequency-amplitude principle is applied for deriving some approximations to the(un)damped *** the forth approach,He’s homotopy technique is employed for analyzing the forced(un)damped PPO *** the fifth approach,the p-solution Method,which is constructed based on Krylov–Bogoliúbov Mitropolsky method,is introduced for deriving an approximation to the forced damped *** the final approach,the hybrid Padé-finite difference method is carried out for analyzing the damped PPO *** proposed techniques are compared to the fourth-order runge–Kutta(rK4)numerical ***,the global maximum residual distance error is estimated for checking the accuracy of the obtained *** proposed methodologies and approximations can help many researchers in studying and investigating several nonlinear phenomena related to the oscillations that can arise in various branches of science,*** and oscillations in plasma physics.

关键词： parametric pendulum equation Ansatz method He’s frequency-amplitude principle He’s homotopy technique Krylov-Bogoliúbov Mitropolsky method the hybrid Padé-finite difference method

Biomaterials in the nano-era

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Chinese science Bulletin 2013年第35期58卷 4337-4341页

作者： HOFFMAN Allan s Department of Bioengineering University of Washington Seattle 98104 USA Kyungpook National University Medical school Daegu 427-724 Korea

This article is a brief summary of my plenary talk at the World Biomaterials Congress in Chengdu,sichuan,China,June 1–5,*** highlights the trend to design and develop biomaterial implants and devices that are more co... 详细信息

关键词：生物材料纳米时代纳米尺度植入物

Using mixed integer programming and airborne laser scanning to generate forest management units

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Journal of Forestry research 2022年第1期33卷 217-226页

作者： Adrián Pascual sándor FTóth Forest research Centre School of AgricultureUniversity of LisbonTapada da Ajuda1349-017 LisboaPortugal school of Forest sciences University of Eastern FinlandP.O.Box 11180101 JoensuuFinland school of Environmental and Forest sciences University of WashingtonSeattleWAUSA

Airborne laser scanning(ALs)has been widely applied to estimate tree and forest attributes,but it can also drive the segmentation of forest *** algorithms are the dominant technique in segmentation but spatial optimization using exact methods remains *** study presents a novel approach to segmentation based on mixed integer programming to create forest management units(FMUs).This investigation focuses on using raster information derived from ALs *** mainstream clustering algorithms were compared to the new MIP formula that simultaneously accounts for area and adjacency restrictions,FMUs size and homogeneity in terms of vegetation *** optimal problem solution was found when using less than 150 cells,showing the problem formulation is *** results for MIP were better than for the clustering algorithms;FMUs were more compact based on the intravariation of canopy height and the variability in size was *** MIP model allows the user to strictly control the size of FMUs,which is not possible in heuristic optimization and in the clustering algorithms *** definition of forest management units based on remote sensing data is an important operation and our study pioneers the use of MIP ALs-based optimal segmentation.

关键词： segmentation Precision forestry Optimization Mathematical programming Airborne laser scanning

Paediatric surgical Outreach to Papua New Guinea: Initial Experience

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International Journal of Clinical Medicine 2018年第9期9卷 697-702页

作者： r. rai Jack Mulu A. s. Jacobsen Department of Paediatric surgery K K Women’s & Children’s Hospital Singapore Paediatric surgical Unit Port Moresby General Hospital Korobosea Papua New Guinea

This is a report of our early experience in establishing a Paediatric surgical outreach program to Papua New Guinea (PNG) to build capacity and improve care. A Paediatric surgical outreach mission was initiated about 4 years ago in collaboration with singhealth and PNG along with the multidisciplinary team of health care professionals from Cardiology, Cardiothoracic surgery, Orthopaedics, Urology, Plastics and Anaesthesia. On each mission trip of 4 - 7 days duration, singhealth doctors supervise or perform surgeries for complex cases, conduct patient consultations and give lectures to impart knowledge and transfer skills to the local health care community in PNG. In addition, a 6 - 12 months training program in singapore for PNG doctors has been started. For complex cases which cannot be managed in PNG, there is provision for transfer of patients to singapore under KKrOK fund for further treatment. so far 4 mission trips have been conducted in past 4 years for paediatric surgical unit in Port Moresby General Hospital of PNG focussing on teaching and training of local Paediatric surgeons. Based on evaluation of the singhealth medical team, there is severe shortage of medical manpower, surgical skill and specialised expertise. Due to lack of intensive care facility, adequate medications and proper medical equipment in the hospital, there are many conditions being left untreated causing high morbidity and mortality among infants and neonates. such humanitarian work inspires singhealth towards its global health mission of promoting health equity in responding to the medical needs of PNG through training and leveraging on strength through partnership. In addition, our doctors gain invaluable learning from the exposure, hone their skill as they treat a diversity of cases and are innovative in their treatment options by working in an environment with limited resources.

关键词： Paediatric surgery Outreach Papua New Guinae

Intralenticular metallic foreign body: a case report

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 326-328页

作者： s C reddy Department of Ophthalmology Faculty of MedicineUniversity of Malaya

A case of retained intralenticular iron piece with signs of mild anterior uveitis at the time of presentation is reported in a 45 year-old man. His vision improved with topical cycloplegics and corticosteroids. After six months, his vision deteriorated grossly due to cataract formation. He regained good vision following removal of foreign body, extracapsular extraction with posterior chamber intraocular lens implantation. This case highlights the conservative management of the condition till the patient develops cataract resulting in visual disability; and good visual recovery following cataract surgery with intraocular lens implantation.

关键词： intralenticular foreign body anterior uveitis traumatic cataract penetrating eye injury

COsMIC rAY IONIZATION IN EArTH’s ATMOsPHErE AND ITs MODULATION BY sOLAr ACTIVITY

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science in China,ser.A 1983年第9期 1004-1016页

作者：庄洪春 r.G.rOBLE Institute of space Physics Academia 8inica Beijing National Center for Atmospheric research Boulder Colorado U. s. A.

A simplified extensive air shower model is used along the incoming path of galactic cosmic rays to calculate the ionization rate in the earth’s atmosphere. The calculated results show that the peak of ionization rate is at an altitude of about 15km above the ground. The maximum ionization rate is about 10 pairs per cm3 per second at the geomagnetic equator and 70--110 pairs at the geomagnetic polar region. Above and below the peak altitude, the ionization rate decays nearly exponentially with a distance away from the peak and the upper slope is steeper than the lower *** ray ionization source functions, i,e. the ionization rate per depth as a function of depth along the incoming path for a unit flux with a certain energy, have been obtained. Using this function, the modulation of the galactic cosmic ray ionization by the solar activity is calculated. The results show that no obvious modulation can be seen near the magnetic equator. The modulation is larger at the higher magnetic latitude. The ma

关键词： than COsMIC rAY IONIZATION IN EArTH’s ATMOsPHErE AND ITs MODULATION BY sOLAr ACTIVITY rate ITs

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内燃机的热力学和空气动力学

内燃机的热力学和空气动力学

Assessment of the July effect in post-endoscopic retrograde cholangiopancreatography pancreatitis:Nationwide Inpatient sample

作者： r.s.·本森(r.s. Benson)

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World Journal of Gastrointestinal Endoscopy 2017年第7期9卷 296-303页

作者： Allison r schulman Marwan s Abougergi Christopher C Thompson Division of Gastroenterology Hepatology and EndoscopyBrigham and Women’s HospitalHarvard Medical School Catalyst Medical Consulting LLC

To assess incidence of post-endoscopic retrograde cholangiopancreatography (post-ErCP) pancreatitis in the early (July/August/september) vs the late (April/May/June) academic year and evaluate in-hospital mortality, length of stay (LOs), and total hospitalization charge between these time periods. METHODsThis was a retrospective cohort study using the 2012 Nationwide Inpatient sample (NIs). Patients with International Classification of Diseases, 9sup>thsup> revision, Clinical Modification (ICD-9 CM) procedure codes for ErCP were included. Patients were excluded from the study if they had an ICD-9 CM code for a principal diagnosis of acute pancreatitis, if the ErCP was performed before or on the day of admission or if they were admitted to non-teaching hospitals. Post-ErCP pancreatitis was defined as an ICD-9 CM code for a secondary diagnosis of acute pancreatitis in patients who received an ErCP as delineated above. ErCPs performed during the months of July, August and september was compared to those performed in April, May and June in academic hospitals. ErCPs performed at academic hospitals during the early vs late year were compared. Primary outcome was incidence of post-ErCP pancreatitis. secondary outcomes included in-hospital mortality, length LOs, and total hospitalization charge. Proportions were compared using fisher’s exact test and continuous variables using student t-test. Multivariable regression was performed. rEsULTsFrom the 36480032 hospitalizations in 2012 in the United states, 6248 were included in the study (3065 in July/August/september and 3183 in April/May/June) in the 2012 academic year. Compared with patients admitted in July/August/september, patients admitted in April/May/June had no statistical difference in all variables including mean age, percent female, Charleston comorbidity index, race, median income, and hospital characteristics including region, bed size, and location. Incidence of post-ErCP pancreatitis in early vs late academi

关键词： Pancreatitis Academic training Endoscopic retrograde cholangiopancreatography Endoscopy July effect

socio-economic, Environmental and Health Aspects of Farm Workers Engaged in Mango Plantations

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Biomedical and Environmental sciences 1995年第4期8卷 301-309页

作者： B. N. GUPTA NEErAJ MATHUr s. K. rAsTOGI A. K. srIVAsTAVA H. CHANDrA, B. s. PANGTEY P. N. MAHENDrA AND r. s. BHArTI(Epidemiotogy Division, Industrial Toxicology research Centre,Lucknow, India) Epidemiology Division Industrial Toxicology Research Centre Lucknow India.

A cross-sectional survey of 489 male subjects in the age group 15 to 65 years engageddirectly or indirectly in mango cultivation along with 208 control subjects was carried out to find their socio-economic, environmental and health conditions. The conditions like high illiteracy rate (49.5%), poverty (PCI less than rs 100 per month, 52.2%), poor housing (mud houses, 66.7%) unsafe water supply (78.6%) were prevailing in the surveyed population. The high respiratory morbidity may be attributed to high prevalence of smoking andprolonged inhalation of organic dusts during farming operation associated with illiteracyand poor socio-economic status. Gastrointestinal disorders were related to poor hygienic conditions, smoking and consumption of contaminated water. The symptoms pertaining to CNs, skin and eyes were found to be associated with exposure to pesticides

关键词： In Environmental and Health Aspects of Farm Workers Engaged in Mango Plantations