Feb26
12:00 pm
Feb26
1:00 pm
Future Leaders in CEE: From subsonic to supersonic: a site-specific study of single microparticle impact bonding
Speaker: Alade Ahmed Tiamiyu, MSc, PhD, EIT, Postdoctoral Research Fellow, DMSE, MIT From a humble background, the journey from the city of Lagos, Nigeria to Canada, and then, USA, will be discussed. I will highlight the unique challenges faced in the process leading to my current position and how I overcome them. The talk will be capped up by addressing Diversity and Inclusion from a small-scale family-model point of view. Cold spray is a fast-growing solid-state coating process with a high deposition rate that has been attracting industrial interest in the last decade. It involves the acceleration of solid powder particles at supersonic speed to impact and adhere to a substrate or previously deposited particles, forming coats. This unique technique is used to mitigate corrosion by depositing more noble materials of superior corrosion resistance on metallic substrates. It can also be used for in situ repairs of cracks, restoration/remanufacturing of unserviceable engineering/aeronautical components or corroded parts that are in service; making them reusable and in turn, save the cost of buying new products. For bonding to occur during cold spray, the impact velocity of the particle, must reach and exceed a critical velocity, and an intimate metal-metal clean contact must be achieved between the metal lattices. To expand the wide-spread application of cold spray to unconventional areas, the underlying mechanism of metal-metal bonding must be unearthed. Till date, the mechanism of bonding is under debate due to the difficulty in experimental observation of microparticle impacts that only span nanoseconds. In this talk, the major advances made in unravelling events that lead to bonding by studying single particle impacts from subsonic to supersonic regimes will be highlighted. Microstructural evolution at the particle-substrate interface will also be discussed.
Feb03
12:00 pm
Feb03
2:00 pm
Future Leaders in CEE: Transit User Mode Choice Behavior in Response to Rapid Transit Service Disruption
The Department of Civil and Environmental (CEE) Engineering at MIT has initiated a monthly seminar series to foster diversity and inclusion. Speakers from diverse backgrounds who are highly successful in their careers will give a talk about their journey to achieve success and their research. The goal of this initiative is to address the relative lack of representation of certain minority groups and to present examples of those who were able to overcome unique challenges. The format is that each speaker will present a two-part seminar - one part of the seminar will be an overview of their research, and another part of the seminar will be how they navigated through various challenges associated with diversity, equity, and inclusion in their careers. Speaker: Teddy Lin, MASc, EIT Transportation Planner at IBI Group Disruption of transit service is a common occurrence in many cities around the world, and these incidents may have serious impacts on the transit user’s journey. The purpose of this study is to investigate transit user commuting mode choice in response to rapid transit service disruption in the City of Toronto. A joint Revealed Preference and Stated Preference survey is designed to gather information on the respondent’s actual response to the most recent service disruption and also responses under a set of hypothetical service disruption scenarios. A transit trip planner tool is developed to generate alternative transit options to avoid the disrupted segment. Econometric models are presented, including a joint RP-SP model, showing that the following factors, in addition to travel time and cost, are significant at 95% confidence: frequency of subway trip, trip purpose, subway delay, shuttle bus delay, weather, age, and income. Policy implications are also discussed. Diversity, equity, and inclusion are important to leverage the full range of talent and skills and to realize the full potential of collective research advancement and education. Canada is a welcoming place that fully embraces diversity, equity, and inclusion. In this talk, the speaker will discuss how he has overcome challenges throughout his journey and how diversity, equity, and inclusion has shaped his life.