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Comparison of rectangular and circular bored twin tunnels in weak ground

Underground Space 2019年第4期4卷 328-339页

作者： michael vinod Hadi Khabbaz School of Civil and Environmental Engineering University of Technology Sydney(UTS)Australia

The recent innovation of a rectangular tunnel boring machine(TBM),and its use in the Hongzhuan Road tunnel underpass by the China Railway Engineering Group(CREG),has revitalized shallow depth soft soil *** paper presents the findings of a numerical study using PLAXIS to determine the surface settlements and moments produced in tunnel linings for circular and rectangular twin *** effects of the relative positions of twin tunnels,critical distances,volume losses,depths of burial,and tunnel sizes for both circular and rectangular tunnels are the key parameters of this *** results indicate that rectangular tunnels are suitable for shallow depths in weak ground as they have lesser settlement compared with circular *** is crucial for tunneling beneath important structures such as railway lines and existing ***,the maximum bending moment produced in the rectangular tunnel lining is higher than that for circular *** use of rectangular TBMs is an unconventional method in modern day tunneling;however,the analysis in this project recommends that tunnel industry engineers consider this method for shallow depth weak ground tunneling.

关键词： Twin tunnels Clay Numerical modeling Rectangular TBM

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Cytomegalovirus enteritis mimicking Crohn's disease in a lupus nephritis patient:A case report

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World Journal of Gastroenterology 2009年第34期15卷 4327-4330页

作者： Faisal Nazir Khan vinod Prasad michael David Klein Department of Nephrology Westchester Medical CenterNew York Medical College Clinical Medicine Department of NephrologyWestchester Medical CenterNew York Medical College

Cytomegalovirus(CMV)infection of the gastrointestinal (GI)tract has been reported in both immunocompetent and,more frequently,in immunocompromised *** describe a case of a 19-year-old male who developed CMV infection of the terminal ileum while receiving immunosuppression for lupus nephritis. This was a distinctly unusual site of infection which clinically mimicked Crohn's *** note that reports of terminal ileal CMV infection have been infrequent. Despite a complicated hospital course,ganciclovir therapy was effective in resolving his symptoms and normalizing his ileal *** report highlights the importance of accurate histological diagnosis and clinical follow-up of lupus patients with GI symptoms undergoing intense immunosuppression.

关键词： Cytomegalovirus Enteritis Lupus nephritis Terminal ileitis

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Renal impairment and heart failure with preserved ejection fraction early post-myocardial infarction

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World Journal of Cardiology 2010年第1期2卷 13-18页

作者： vinod Jorapur Gervasio A Lamas Zygmunt P Sadowski Harmony R Reynolds Antonio C Carvalho Christopher E Buller James M Rankin Jean Renkin Philippe Gabriel Steg Harvey D White Carlos Vozzi Eduardo Balcells michael Ragosta C Edwin Martin Vankeepuram S Srinivas William W Wharton III Staci Abramsky Ana C Mon Shari S Kronsberg Judith S Hochman Columbia University Division of Cardiology Mount Sinai Medical Center II Ischemic Heart Disease Department National Institute of Cardiology Leon Charney Division of Cardiology New York University School of Medicine Cardiology Division-Hospital Sao Paulo Federal University of Sao Paulo Division of Cardiology University of British Columbia Department of Cardiovascular Medicine Royal Perth Hospital Department of Cardiology UCL St Luc University Hospital INSERM U-698 Department of CardiologyHopital Bichat Cardiology Department Green Lane Cardiovascular ServiceAuckland City Hospital Interventional Cardiology Instituto de Intervenciones Cardiovasculares S.A. Cardiovascular Associates Wellmont Holston Valley Medical Center Cardiovascular Division University of Virginia Department of Medicine-Division of Cardiology York Hospital Division of Cardiology Montefiore Medical Center/Albert Einstein College of Medicine Research Department Asheville Cardiology AssociatesP.A. Maryland Medical Research Institute

AIM:To study if impaired renal function is associated with increased risk of peri-infarct heart failure (HF) in patients with preserved ejection fraction (EF).METHODS:Patients with occluded infarct-related arteries (IRAs) between 1 to 28 d after myocardial infarction (MI) were grouped into chronic kidney disease (CKD) stages based on estimated glomerular filtration rate (eGFR).Rates of early post-MI HF were compared among eGFR *** regression was used to explore independent predictors of ***:Reduced eGFR was present in 71.1% of 2160 patients,with significant renal impairment (eGFR < 60 mL/min every 1.73 m2) in 14.8%.The prevalence of HF was higher with worsening renal function:15.5%,17.8% and 29.4% in patients with CKD stages 1,2 and 3 or 4,respectively (P < 0.0001),despite a small absolute difference in mean EF across eGFR groups:48.2 ± 10.0,47.9 ± 11.3 and 46.2 ± 12.1,respectively (P=0.02).The prevalence of HF was again higher with worsening renal function among patients with preserved EF:10.1%,13.6% and 23.6% (P < 0.0001),but this relationship was not significant among patients with depressed EF:27.1%,26.2% and 37.9% (P= 0.071).Moreover,eGFR was an independent correlate of HF in patients with preserved EF (P=0.003) but not in patients with depressed EF (P=0.181).CONCLUSION:A significant proportion of post-MI patients with occluded IRAs have impaired renal *** renal function was associated with an increased rate of early post-MI HF,the association being strongest in patients with preserved *** findings have implications for management of peri-infarct HF.

关键词： Heart failure Myocardial infarction Kidney disease

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