Racism Online: Racialized Aggressions and Sense of Belonging Among Asian American College Students

Thesis advisor: Ana M. Martínez-AlemánCollege students today are the most connected and social media savvy generation in the history of higher education (Junco & Cole-Avent, 2008) and maintain constant connections to online platforms such as Facebook and Twitter (Clem & Junco, 2015). Social media are now understood as a central component of campus and student life across colleges and universities (Martínez-Alemán & Wartman, 2009). Coinciding with the proliferation of social media use has been a rise in racialized hostilities on online settings. These offenses often target racially minoritized students, and scholars have become increasingly interested in understanding the ways this antagonism on social media impacts college student experiences (Tynes, Rose, & Markoe, 2013), including Asian Americans (Museus & Truong, 2013).         This dissertation uses a critical race theory framework to examine the racialized environment on social media, how Asian American college students experience racialized aggressions, and how their sense of belonging is impacted by racially hostile online encounters. This dissertation addresses the following question: How do encounters with racialized aggressions on social media impact Asian American students’ sense of belonging at a PWI? 29 participants from a predominantly white institution, East Oak University, engaged in individual interviews, participant observations, artifact collection, and focus groups as part of this study. The findings of this study suggest that the encounter of racialized aggressions on social media, especially those on the anonymous platform Yik Yak, are detrimental in facilitating positive sense of belonging among Asian Americans at East Oak. These online racialized encounters are asserted to be rooted in the endemic nature of racism at East Oak, and the claiming of social media as a property that enabled Whites to define and dictate campus culture by engaging in racist discourse. The nature of these online communications speaks to the ways that social media is suggested to influence both sense of belonging and institutional racial climates on today’s college campuses.Thesis (PhD) — Boston College, 2017.Submitted to: Boston College. Lynch School of Education.Discipline: Educational Leadership and Higher Education

Inter-Symbol Guard Time for Synchronizing Optical PPM

An inter-symbol guard time has been proposed as a means of synchronizing the symbol and slot clocks of an optical pulse-position modulation (PPM) receiver with the symbol and slot periods of an incoming optical PPM signal.The proposal is applicable to the low-flux case in which the receiver photodetector operates in a photon-counting mode and the count can include contributions from incidental light sources and dark current

Sample-Clock Phase-Control Feedback

To demodulate a communication signal, a receiver must recover and synchronize to the symbol timing of a received waveform. In a system that utilizes digital sampling, the fidelity of synchronization is limited by the time between the symbol boundary and closest sample time location. To reduce this error, one typically uses a sample clock in excess of the symbol rate in order to provide multiple samples per symbol, thereby lowering the error limit to a fraction of a symbol time. For systems with a large modulation bandwidth, the required sample clock rate is prohibitive due to current technological barriers and processing complexity. With precise control of the phase of the sample clock, one can sample the received signal at times arbitrarily close to the symbol boundary, thus obviating the need, from a synchronization perspective, for multiple samples per symbol. Sample-clock phase-control feedback was developed for use in the demodulation of an optical communication signal, where multi-GHz modulation bandwidths would require prohibitively large sample clock frequencies for rates in excess of the symbol rate. A custom mixedsignal (RF/digital) offset phase-locked loop circuit was developed to control the phase of the 6.4-GHz clock that samples the photon-counting detector output. The offset phase-locked loop is driven by a feedback mechanism that continuously corrects for variation in the symbol time due to motion between the transmitter and receiver as well as oscillator instability. This innovation will allow significant improvements in receiver throughput; for example, the throughput of a pulse-position modulation (PPM) with 16 slots can increase from 188 Mb/s to 1.5 Gb/s

Critical Cultural Student Affairs Praxis and Participatory Action Research

This paper explores how student affairs practitioners may engage in critical cultural praxis through participatory action research (PAR). As authors, both researchers and practitioners, we partnered with one another to conduct a needs assessment of Asian American students through PAR methods at a university in the northeast United States. Unfortunately, the PAR project as initially designed did not come to fruition. We used autoethnography to understand the many barriers that prevented the completion of the project, such as lengthy and unclear IRB processes, lack of organizational stability, and limited institutional support. Finally, we offer insight into how scholar-practitioners and institutions can better prepare for and support PAR initiatives as a way to engage in critical cultural praxis on their campuses

DOT Transmit Module

The Deep Space Optical Terminal (DOT) transmit module demonstrates the DOT downlink signaling in a flight electronics assembly that can be qualified for deep space. The assembly has the capability to generate an electronic pulse-position modulation (PPM) waveform suitable for driving a laser assembly to produce the optical downlink signal. The downlink data enters the assembly through a serializer/ deserializer (SERDES) interface, and is encoded using a serially concatenated PPM (SCPPM) forward error correction code. The encoded data is modulated using PPM with an inter-symbol guard time to aid in receiver synchronization. Monitor and control of the assembly is via a low-voltage differential signal (LVDS) interfac

Scalable SCPPM Decoder

A decoder was developed that decodes a serial concatenated pulse position modulation (SCPPM) encoded information sequence. The decoder takes as input a sequence of four bit log-likelihood ratios (LLR) for each PPM slot in a codeword via a XAUI 10-Gb/s quad optical fiber interface. If the decoder is unavailable, it passes the LLRs on to the next decoder via a XAUI 10-Gb/s quad optical fiber interface. Otherwise, it decodes the sequence and outputs information bits through a 1-GB/s Ethernet UDP/IP (User Datagram Protocol/Internet Protocol) interface. The throughput for a single decoder unit is 150-Mb/s at an average of four decoding iterations; by connecting a number of decoder units in series, a decoding rate equal to that of the aggregate rate is achieved. The unit is controlled through a 1-GB/s Ethernet UDP/IP interface. This ground station decoder was developed to demonstrate a deep space optical communication link capability, and is unique in the scalable design to achieve real-time SCPP decoding at the aggregate data rate

Fundamental properties of Ca²⁺ signals

Background Ca²⁺ is a ubiquitous and versatile second messenger that transmits information through changes of the cytosolic Ca²⁺ concentration. Recent investigations changed basic ideas on the dynamic character of Ca²⁺ signals and challenge traditional ideas on information transmission. Scope of review We present recent findings on key characteristics of the cytosolic Ca²⁺ dynamics and theoretical concepts that explain the wide range of experimentally observed Ca²⁺ signals. Further, we relate properties of the dynamical regulation of the cytosolic Ca²⁺ concentration to ideas about information transmission by stochastic signals. Major conclusions We demonstrate the importance of the hierarchal arrangement of Ca²⁺ release sites on the emergence of cellular Ca²⁺ spikes. Stochastic Ca²⁺ signals are functionally robust and adaptive to changing environmental conditions. Fluctuations of interspike intervals (ISIs) and the moment relation derived from ISI distributions contain information on the channel cluster open probability and on pathway properties. General significance Robust and reliable signal transduction pathways that entail Ca²⁺ dynamics are essential for eukaryotic organisms. Moreover, we expect that the design of a stochastic mechanism which provides robustness and adaptivity will be found also in other biological systems. Ca2 + dynamics demonstrate that the fluctuations of cellular signals contain information on molecular behavior. This article is part of a Special Issue entitled Biochemical, biophysical and genetic approaches to intracellular calcium signaling. Highlights ► We review recent findings on key characteristics of cytosolic Ca²⁺ dynamics. ► We demonstrate the importance of the hierarchal arrangement of Ca²⁺ release sites. ► New theoretical concepts exploit emergent behavior of cellular Ca²⁺ spikes. ► We relate the dynamical regulation of [Ca²⁺] to information transmission. ► Stochastic Ca²⁺ signals are functionally robust and adaptive to changing conditions

Secondary metabolite gene expression and interplay of bacterial functions in a tropical freshwater cyanobacterial bloom

Cyanobacterial harmful algal blooms (cyanoHABs) appear to be increasing in frequency on a global scale. The Cyanobacteria in blooms can produce toxic secondary metabolites that make freshwater dangerous for drinking and recreation. To characterize microbial activities in a cyanoHAB, transcripts from a eutrophic freshwater reservoir in Singapore were sequenced for six samples collected over one day-night period. Transcripts from the Cyanobacterium Microcystis dominated all samples and were accompanied by at least 533 genera primarily from the Cyanobacteria, Proteobacteria, Bacteroidetes and Actinobacteria. Within the Microcystis population, abundant transcripts were from genes for buoyancy, photosynthesis and synthesis of the toxin microviridin, suggesting that these are necessary for competitive dominance in the Reservoir. During the day, Microcystis transcripts were enriched in photosynthesis and energy metabolism while at night enriched pathways included DNA replication and repair and toxin biosynthesis. Microcystis was the dominant source of transcripts from polyketide and non-ribosomal peptide synthase (PKS and NRPS, respectively) gene clusters. Unexpectedly, expression of all PKS/NRPS gene clusters, including for the toxins microcystin and aeruginosin, occurred throughout the day-night cycle. The most highly expressed PKS/NRPS gene cluster from Microcystis is not associated with any known product. The four most abundant phyla in the reservoir were enriched in different functions, including photosynthesis (Cyanobacteria), breakdown of complex organic molecules (Proteobacteria), glycan metabolism (Bacteroidetes) and breakdown of plant carbohydrates, such as cellobiose (Actinobacteria). These results provide the first estimate of secondary metabolite gene expression, functional partitioning and functional interplay in a freshwater cyanoHAB.Singapore. National Research Foundation (Singapore MIT Alliance for Research and Technology (SMART), Center for Environmental Sensing and Modeling (CENSAM) research program)National Science Foundation (U.S.) (Postdoctoral Research Fellowship in Biology, Grant No. DBI-1202865)National Institute of Environmental Health Sciences (NIEHS Grant P30-ES002109 to the MIT Center for Environmental Health Sciences)MIT International Science and Technology Initiatives (MISTI-Hayashi fund

Agent-Relative Knowledge in Heidegger

When an agent “loses herself” in a project, or becomes completely absorbed in an activity, she has what Heidegger calls “reflected self-understanding”. This kind of reflected understanding allows the agent to find herself out in the world, “in things”, without ever holding any reflexive attitudes about herself. In my dissertation, I develop and defend Heidegger’s account of reflected self-understanding, which constitutes – for Heidegger – the most basic grip an agent has on who she is. I suggest that Heidegger’s account of reflected self-understanding is not only a significant contribution to the history of philosophy, but also the central kernel that structures Heidegger’s thought on the topics of understanding, interpretation, truth, and authenticity in Being and Time

Racialized aggressions and sense of belonging among Asian American college students

This naturalistic, qualitative inquiry explored how Asian American college students’ encounters with racialized aggressions on social media impacted their sense of belonging at a predominately White institution (PWI). Participants indicated that encounters with racism on social media, especially on the anonymous mobile app Yik Yak, engendered racial distrust, and alienation from their institution. These findings suggest the virtual components of campus culture play a critical role in determining how Asian American college students feel they are welcomed, valued, and included at a PWI