"Animated ghost- A librarian won't ghost you" poster

These posters were created to encourage students to ask a librarian for help with essays or other assignments

Valentine's Day "conversation hearts" posters

These posters were created to encourage students to utilized resources available to them through BU Libraries

An Indoor Navigation System Using a Sensor Fusion Scheme on Android Platform

With the development of wireless communication networks, smart phones have become a necessity for people’s daily lives, and they meet not only the needs of basic functions for users such as sending a message or making a phone call, but also the users’ demands for entertainment, surfing the Internet and socializing. Navigation functions have been commonly utilized, however the navigation function is often based on GPS (Global Positioning System) in outdoor environments, whereas a number of applications need to navigate indoors. This paper presents a system to achieve high accurate indoor navigation based on Android platform. To do this, we design a sensor fusion scheme for our system. We divide the system into three main modules: distance measurement module, orientation detection module and position update module. We use an efficient way to estimate the stride length and use step sensor to count steps in distance measurement module. For orientation detection module, in order to get the optimal result of orientation, we then introduce Kalman filter to de-noise the data collected from different sensors. In the last module, we combine the data from the previous modules and calculate the current location. Results of experiments show that our system works well and has high accuracy in indoor situations

Dissecting the quasar main sequence: insight from host galaxy properties

The diverse properties of broad-line quasars appear to follow a well-defined main sequence along which the optical FeII strength increases. It has been suggested that this sequence is mainly driven by the Eddington ratio (L/L_Edd) of the black hole (BH) accretion. Shen & Ho demonstrated with quasar clustering analysis that the average BH mass decreases with increasing FeII strength when quasar luminosity is fixed, consistent with this suggestion. Here we perform an independent test by measuring the stellar velocity dispersion sigma* (hence the BH mass via the M-sigma* relation) from decomposed host spectra in low-redshift Sloan Digital Sky Survey quasars. We found that at fixed quasar luminosity, sigma* systematically decreases with increasing FeII strength, confirming that Eddington ratio increases with FeII strength. We also found that at fixed luminosity and FeII strength, there is little dependence of sigma* on the broad Hbeta FWHM. These new results reinforce the framework put forward by Shen & Ho that Eddington ratio and orientation govern most of the diversity seen in broad-line quasar properties.Comment: ApJL in press; 5 pages and 4 figure

Low income households under austerity: A notable rise in debt for essential needs

Final Published versio

Research on Le Corbusier’s Architectural Order -- Modulor

As the deep structure of architecture, architecture order can express the inherent characteristics of architecture. Le Corbusier’s Modulor is his expression of architectural order. Modulor is to find a more suitable method to measure the space scale. It can quickly build nodes through geometric rules to form an artificial order beauty. From the Residence of Marseille, which was the first large-scale attempt at modulus values, to the Heidi Weber Museum, which was later combined with prefabricated buildings, the Modulor was applied in different ways in different stages of Le Corbusier’s career. This article discusses and analyzes the generation and development of the Modulor, its practical application in different stages, and its development prospects