Dec 02, 2019 Dec 02, 2019
12:00PM 01:30PM Colloquium: Online Discrimination: (JWJI Race & Difference Colloquium) Online Discrimination, Black Students’ Academic Experiences, and the Role of White Bystanders A primary driver of the Black-White college-completion gap may be the discriminatory experiences Black students face at predominantly White institutions (McCabe, 2009). Relative to other racial/ethnic groups, Black students report the lowest satisfaction with campus racial climate; moreover, perceptions of negative racial climate indirectly influence students’ persistence in college and degree completion (Museus et al., 2008). Notably, limited research to date has examined the role of online discrimination in influencing students’ perceptions of campus racial climate even though online social spaces may be the most salient and damaging venues for acts of discrimination among college students (Tynes et al., 2013). Moreover, the limited research that has been conducted largely has not explored White students as actors and bystanders who are implicated in these online interactions. Thus, the current study was undertaken to 1) document the nature and frequency of racially-discriminatory comments posted on specific social media platforms, 2) better understand how racist posts affect Black students’ perceptions of institutional racial climate, sense of belonging at their institution, and academic performance, 3) better understand how White students experience racist posts, and 4) identify factors that may prompt White students to confront racist posts with the goal of developing a bystander intervention for White students to confront other White students who are engaging in anti-Black online discrimination. + Jones Room, RM 311, Woodruff Library Campus Events
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12:00PM 01:30PM Colloquium: Online Discrimination: (JWJI Race & Difference Colloquium) Online Discrimination, Black Students’ Academic Experiences, and the Role of White Bystanders A primary driver of the Black-White college-completion gap may be the discriminatory experiences Black students face at predominantly White institutions (McCabe, 2009). Relative to other racial/ethnic groups, Black students report the lowest satisfaction with campus racial climate; moreover, perceptions of negative racial climate indirectly influence students’ persistence in college and degree completion (Museus et al., 2008). Notably, limited research to date has examined the role of online discrimination in influencing students’ perceptions of campus racial climate even though online social spaces may be the most salient and damaging venues for acts of discrimination among college students (Tynes et al., 2013). Moreover, the limited research that has been conducted largely has not explored White students as actors and bystanders who are implicated in these online interactions. Thus, the current study was undertaken to 1) document the nature and frequency of racially-discriminatory comments posted on specific social media platforms, 2) better understand how racist posts affect Black students’ perceptions of institutional racial climate, sense of belonging at their institution, and academic performance, 3) better understand how White students experience racist posts, and 4) identify factors that may prompt White students to confront racist posts with the goal of developing a bystander intervention for White students to confront other White students who are engaging in anti-Black online discrimination. + Jones Room, RM 311, Woodruff Library Campus Events
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03:30PM 04:30PM Seminar: Marissa Weichman, JILA/UC Colorado: "Molecular quantum dynamics via state resolved spectroscopies" My research to date has focused on elucidating the structure and dynamics of exotic molecules through novel high resolution spectroscopies. In the first half of my talk, I will discuss my graduate work, where I developed a high energy resolution variant of anion photoelectron spectroscopy and applied it for transition state spectroscopy experiments of the benchmark F + H2 and F + CH3OH bimolecular reactions. Photodetachment of a bound anion similar in geometry to a neutral transition state yields a spectrum showing structure characteristic of the reactive surface, including discrete quantum resonances bound or quasibound along the reaction coordinate. High-level quantum dynamical calculations yield excellent agreement with our experimental results, allow assignment of structure, and demonstrate the utility of transition state spectroscopy experiments as standards for ab initio theoretical treatment of increasingly complex reactions. In the second half of my talk I will discuss my postdoctoral work, where I have harnessed mid-infrared frequency comb spectroscopy for precise interrogation of unprecedentedly large molecular species. Frequency combs are light sources consisting of thousands of evenly spaced, sharp frequency “teeth.” Cavity-enhanced frequency comb spectroscopy (CE-FCS) matches a comb’s evenly spaced spectral structure to the resonant modes of an optical cavity. This method allows for simultaneous detection of absorption signal across the comb spectrum, extremely high frequency resolution, and high sensitivity as the cavity dramatically enhances the interaction length between light and sample. I have combined buffer gas cooling of large molecules with CE-FCS in order to measure the rovibrational structure of buckminsterfullerene (C60), a molecule of great fundamental interest and a longstanding spectroscopic challenge. Our frequency comb measurements represent the first direct probe of the internal structure of C60 at the single quantum state level and establish it as by far the largest molecule for which a state resolved spectrum has been reported. + Atwood Hall 360 Campus Events
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03:30PM 04:30PM Seminar: Marissa Weichman, JILA/UC Colorado: "Molecular quantum dynamics via state resolved spectroscopies" My research to date has focused on elucidating the structure and dynamics of exotic molecules through novel high resolution spectroscopies. In the first half of my talk, I will discuss my graduate work, where I developed a high energy resolution variant of anion photoelectron spectroscopy and applied it for transition state spectroscopy experiments of the benchmark F + H2 and F + CH3OH bimolecular reactions. Photodetachment of a bound anion similar in geometry to a neutral transition state yields a spectrum showing structure characteristic of the reactive surface, including discrete quantum resonances bound or quasibound along the reaction coordinate. High-level quantum dynamical calculations yield excellent agreement with our experimental results, allow assignment of structure, and demonstrate the utility of transition state spectroscopy experiments as standards for ab initio theoretical treatment of increasingly complex reactions. In the second half of my talk I will discuss my postdoctoral work, where I have harnessed mid-infrared frequency comb spectroscopy for precise interrogation of unprecedentedly large molecular species. Frequency combs are light sources consisting of thousands of evenly spaced, sharp frequency “teeth.” Cavity-enhanced frequency comb spectroscopy (CE-FCS) matches a comb’s evenly spaced spectral structure to the resonant modes of an optical cavity. This method allows for simultaneous detection of absorption signal across the comb spectrum, extremely high frequency resolution, and high sensitivity as the cavity dramatically enhances the interaction length between light and sample. I have combined buffer gas cooling of large molecules with CE-FCS in order to measure the rovibrational structure of buckminsterfullerene (C60), a molecule of great fundamental interest and a longstanding spectroscopic challenge. Our frequency comb measurements represent the first direct probe of the internal structure of C60 at the single quantum state level and establish it as by far the largest molecule for which a state resolved spectrum has been reported. + Atwood Hall 360 Campus Events
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