Human-centric light sensing and estimation from RGBD images: the invisible light switch

Lighting design in indoor environments is of primary importance for at least two reasons: 1) people should perceive an adequate light; 2) an effective lighting design means consistent energy saving. We present the Invisible Light Switch (ILS) to address both aspects. ILS dynamically adjusts the room illumination level to save energy while maintaining constant the light level perception of the users. So the energy saving is invisible to them. Our proposed ILS leverages a radiosity model to estimate the light level which is perceived by a person within an indoor environment, taking into account the person position and her/his viewing frustum (head pose). ILS may therefore dim those luminaires, which are not seen by the user, resulting in an effective energy saving, especially in large open offices (where light may otherwise be ON everywhere for a single person). To quantify the system performance, we have collected a new dataset where people wear luxmeter devices while working in office rooms. The luxmeters measure the amount of light (in Lux) reaching the people gaze, which we consider a proxy to their illumination level perception. Our initial results are promising: in a room with 8 LED luminaires, the energy consumption in a day may be reduced from 18585 to 6206 watts with ILS (currently needing 1560 watts for operations). While doing so, the drop in perceived lighting decreases by just 200 lux, a value considered negligible when the original illumination level is above 1200 lux, as is normally the case in offices

Spartan Daily, December 16, 1943

Volume 32, Issue 48https://scholarworks.sjsu.edu/spartandaily/10854/thumbnail.jp

Public Safety Agencies and UAV Technology: A Review of Uses

This study utilizes a systematic review of some of the scholarly literature available on drone usage within Southern California, specifically in Los Angeles and Chula Vista. I ask: how do public safety agencies use drone technology? The review will cover cases from existing scholarly literature, as well as policy reports and books from the Google Scholar database. A systematic review was the best methodology to begin fully investigating my research question, since the scope could have been so large that individual data points would have been difficult to find and instead requires a macro-level review. This data will provide a foundation to function as a pre-study for scholars to use in future research and case studies. I chose this method since most academia has tended to examine the usage of UAV technology abroad or at the border, but the expansion of domestic drone usage by public safety agencies hundreds of miles from any border necessitates an understanding of their role in domestic policing. Using the approach described above, I will develop original data using the process of thematic coding to respond to the identified question to understand the real usage of drones and UAV systems in California