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Autonomous vehicles wheel wander: Structural impact on flexible pavements

Journal of Traffic and Transportation Engineering(English Edition) 2021年第3期8卷 388-398页

作者： konstantina georgouli Christina Plati Andreas Loizos Department of Transportation Planning and Engineering School of Civil EngineeringNational Technical University of AthensZografou 15773Greece

Autonomous vehicles(AVs), including trucks, are already available and their adoption is coming at a rapid pace. Despite the fact that this new transportation technology will travel on existing pavement infrastructure assets, the study and investigation of the AVs structural impact on pavements has not reached the same level of attention and maturity as other related research areas. Considering the extensive investment on pavement construction and maintenance, the necessity to fully understand these impacts in the long term, is becoming evident. The present paper presents and discusses currently published relevant research and findings on the quantification of the wheel wander potential impact,both negative and positive, offering potential insightful future areas of enquiry to help mold and shape future research for this emerging field. The paper focuses on the impact of the AVs zero lateral wheel wander on both new flexible pavement design and the damage accumulation within existing flexible pavement structures. Other wheel wander distributions(normal, uniform, etc.) are investigated as well. The outcome and findings are that the AVs zero lateral wheel wander has a definable negative structural impact on flexible pavement structures in comparison to current human-driven(non-autonomous) vehicles that tend to follow a normal lateral wheel wander distribution. However, under certain defined conditions(optimal wheel wander distribution), the pavement service life can be potentially extended.

关键词： Road engineering Autonomous vehicles Wheel wander Pavement design Pavement performance

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Quantification of skid resistance seasonal variation in asphalt pavements

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第2期7卷 237-248页

作者： Christina Plati Maria Pomoni konstantina georgouli Laboratory of Pavement Engineering School of Civil EngineeringNational Technical University of Athens(NTUA)Athens 15773Greece

The present study deals with the quantification of skid resistance seasonal variation in asphalt pavements.Consequently,skid resistance data were collected twice per year(after"wet"and"dry"seasons)along four trial sections of an urban highway with a GripTester system(during a six-year field experiment).For the estimation of a percentage reference change(%)between wet and dry skid resistance data,a methodology is developed based on distribution fitting of the percentage change of skid resistance index due to seasonal variation impact.The outcome of the analysis is applied and successfully validated through a set of skid resistance data collected from an interurban highway pavement section with different traffic and environmental conditions.As such the developed methodology can be considered as a promising tool for accommodating the seasonal variation of skid resistance.Further,the resulting percentage reference change(%)enables the estimation of skid resistance level for the dry period based on the wet period measurements.Overall,it seems that the proposed quantification process may constitute a practical yet efficient tool for road authorities and highway operators on how to estimate the effect of seasonal variation on skid resistance levels and schedule well-ahead necessary actions for enhancing driving safety.

关键词： Asphalt pavement Skid resistance Seasonal variation Quantification Road safety

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Microproteinuria in patients with inflammatory bowel disease:Is it associated with the disease activity or the treatment with 5-aminosalicylic acid?

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World Journal of Gastroenterology 2006年第5期12卷 739-746页

作者： Androniki C Poulou Konstantinos E Goumas Dimitrios C Dandakis Ioannis Tyrmpas Maria Panagiotaki Androniki georgouli Dimitrios C Soutos Athanasios Archimandritis Gastroenterology Department of Red Cross Hospital of Athens Athanasaki 111521 AthensGreece 2~(nd) Department of Internal Medicine University of Athens Medical School"Hippokratio"General Hospital11521 AthensGreece

瞄准：调查在有煽动性的肠疾病(IBD ) 的病人的 microproteinuria 是否与 5-aminosalicylic 酸(5-ASA ) 与疾病活动或治疗被联系。方法：我们有希望地与 IBD 在 86 个连续病人学习了 microproteinuria， 61 与 ulcerative (UC ) 并且 25... 详细信息

瞄准：调查在有煽动性的肠疾病(IBD ) 的病人的 microproteinuria 是否与 5-aminosalicylic 酸(5-ASA ) 与疾病活动或治疗被联系。方法：我们有希望地与 IBD 在 86 个连续病人学习了 microproteinuria， 61 与 ulcerative (UC ) 并且 25 与 Crohn 的疾病(CD ) ，以前象在他们在学习的包括以后的 2 和 6 个月一样。46 个病人为 28.8 个月(范围 1-168 瞬间) 的一个时期收到了 5-ASA。Microalbuminuria (妈磅) 和尿肾的管状的蛋白质 beta2-microglobulin (beta2mGLB ) 和 beta-N-acetyl-D-glucosamidase 铺平(贝它 -- 唠叨) 一夜间在 12-h 象 creatinine 一样被决定尿收集。肿瘤坏死 factor-alpha (TNF-alpha ) 浆液层次也被测量。结果：277 大小的一个总数(194 在 UC 病人并且 83 在 CD 病人) 被执行。在 UC 和 CD 病人的反常 microproteinuria 的流行为妈磅是 12.9% 和 6.0% ， 22.7% 和 27.7% 为 beta2mGLB，并且 11.3% 和 8.4% 为贝它 -- 分别地唠叨。妈磅没与 IBD 活动被联系。Beta2mGLB 和贝它 -- 唠叨尿层次被相关到 UC 活动(UCAI：P<0.01；UCEI：P<0.005 ) 。在 UC 病人和贝它的妈磅 -- 在 CD 病人唠叨尿层次与 TNF-alpha 浆液层次有关。一个协会在 microproteinuria 和吸烟习惯之间被注意。有 5-ASA 的治疗没被相关到 microproteinuria 的严厉或到 creatinine 的变化。结论：Microproteinuria 主要与 UC 和它的活动被联系然而并非由 5-ASA 影响了。

关键词：炎性肠疾病治疗临床表现病理机制

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