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您的检索式：作者名="Daniel C.Stubbs"
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| 1 | Predictors of nodal metastasis in sinonasal squamous cell carcinoma:A national cancer database analysis显示文摘Objective:We present the largest population based study of sinonasal squamous cell carcinoma(SCC)to identify risk factors for presentation with nodal metastasis.Methods:The National Cancer Database(NCDB)was used for this study.Location codes corresponding to the nasal cavity and paranasal sinuses and histology codes representing SCC malignancy were queried.Logistic regression analysis was performed to identify factors associated with presentation with nodal metastasis.Results:6448 cases met inclusion criteria.Nodal metastasis at presentation was seen in 13.2%of patients,with the sinus subsite(19.3%)being a significant risk factor for nodal metastasis at presentation when compared to the nasal cavity(7.9%).Logistic regression analysis showed black,uninsured and Medicaid patients were more likely than white and privately insured patients,respectively,to present with nodal metastasis.Conclusions:In sinonasal SCC,the sinus subsite has a significantly increased risk of nodal metastasis compared to the nasal cavity.Black race,uninsured and Medicaid patients are more likely to have nodal metastasis at presentation. | Viran J.Ranasinghe Vanessa C.Stubbs Danielle C.Reny Ramie Fathy Jason A.Brant Jason G.Newman | 2020 | World Journal of Otorhinolaryngology-Head and Neck Surgery2020，6，2： | 2 |
| 2 | An experimental and theoretical investigation of a small,high aspect-ratio,free-piston,two-stroke engine显示文摘This paper presents a design for a novel,palm sized,high-aspect-ratio engine.To simplify fabrication and keep the device unobtrusive,a design incorporating a two-cycle engine having a flat,rectangular piston with spring return was selected.An experimental engine based on this concept producing a significant amount of useful work was developed.Although results were encouraging,this geometry raised many issues to be investigated and resolved,including the effects of piston sealing,scavenging,heat losses,and combustion efficiency.Due to the complex interplay between these effects,experimental investigation was time consuming and simple models were found to be inadequate.Therefore,a more complex theoretical model accounting for these effects was developed and used to evaluate the sensitivity of engine performance to each of these parameters.The predictions of this model were used to develop recommendations for improving the experimentally developed engine. | Chiluwata E.Lungu Mael Disseau Daniel C.Stubbs Jechiel Jagoda David E.Scarborough | 2020 | Propulsion and Power Research2020，9，4： | 2 |
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