David T. Nguyen

David T. Nguyen
Meta

Ph.D.

About

21
Publications
4,027
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
301
Citations
Citations since 2017
0 Research Items
229 Citations
2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
Introduction
Dr. Nguyen works with Prof. Gang Zhou in the Computer Science department at the College of William and Mary. He also works closely with Prof. Guoliang Xing from Michigan State University. Learn more at http://davidnguyen.cz

Publications

Publications (21)
Article
Wearable glasses are on the rising edge of development with great user popularity. However, user data stored on these devices bring privacy risks to the owner. To better protect the owner’s privacy, a continuous authentication system is needed. In this paper, we propose a continuous and noninvasive authentication system for wearable glasses, named...
Article
Mobile video chat apps offer users an approachable way to communicate with others. As high-speed 4G networks are being deployed worldwide, the number of mobile video chat app users increases. However, video chatting on mobile devices brings users financial concerns, since streaming video demands high bandwidth and can use up a large amount of data...
Article
We live in a 3-D world. However, the smart phones that we use every day are incapable of sensing depth, without the use of custom hardware. By creating new depth sensors, we can provide developers with the tools that they need to create immersive mobile applications that take advantage of the 3-D nature of our world. In this paper, we propose a new...
Article
Full-text available
WiFi effectively has two extremes: low power consumption and high latency, or low latency and high power consumption. WiFi Power Save Mode saves energy by trading added latency for less power consumption. Minimal latency but maximum power, on the other hand, is consumed with WiFi Active Mode. While research has advanced in mitigating these extremes...
Conference Paper
Full-text available
The smartphone has become an important part of our daily lives. However, the user experience is still far from being optimal. In particular, despite the rapid hardware upgrades, current smartphones often suffer various unpredictable delays during operation, e.g., when launching an app, leading to poor user experience. In this paper, we investigate...
Article
Full-text available
Video chat apps enable users to stay in touch with their family, friends and colleagues. However, they consume a lot of bandwidth and hence can quickly use up a monthly data plan quota, which is a high-cost resource on smartphones. In this paper, we propose LBVC (Low-bandwidth Video Chat), a user-guided vibration-aware frame rate adaption framework...
Article
Full-text available
Existing research has demonstrated that inter-body sensor network (inter-BSN) information sharing among coexisting BSNs can enhance applications' performance and save energy. However, how to achieve effective inter-BSN information sharing through wireless communication is a challenging task. On one hand, a BSN should be able to discover neighboring...
Article
Full-text available
Wireless sensor network applications, such as those for natural disaster warning, vehicular traffic monitoring, and surveillance, have stringent accuracy requirements for detecting or classifying events and demand long system lifetimes. Through quantitative study, we show that existing event detection approaches are challenged to explore the sensin...
Conference Paper
Continuous authentication modalities allow a device to authenticate users transparently without interrupting them or requiring their attention. This is especially important on smartphones, which are more prone to be lost or stolen than regular computers, and carry plenty of sensitive information. There is a multitude of signals that can be harnesse...
Conference Paper
Full-text available
Smartphones suffer various unpredictable delays, e.g., when launching an application. In this work, we investigate the behavior of reads and writes in smartphones. We conduct the first large-scale measurement study on the Android I/O delay using the data collected from our Android application running on 1480 devices within 188 days. Among others, w...
Conference Paper
Full-text available
The time it takes to launch a smartphone application is unpredictable. In this paper, we explore how these unpredictable launch times are affiected by constraints associated with reading (writing) from (to) ash storage. We conduct the first large-scale measurement study on the Android I/O delay using the data collected from our Android application...
Conference Paper
Despite the rapid hardware upgrades, current smartphones suffer various unpredictable delays during operation, e.g., when launching an app, leading to poor user experience. In this work, we investigate the behavior of reads and writes in smartphones. We conduct the first large-scale measurement study on the I/O delay of Android using the data colle...
Article
Full-text available
The smartphone has become an important part of our daily lives. However, the user experience is still far from being optimal. In particular, despite the rapid hardware upgrades, current smartphones often suffer various unpredictable delays during operation, e.g., when launching an application, leading to poor user experience. This video features ou...
Conference Paper
Full-text available
In this paper, to our best knowledge, we are first to provide an experimental study on how storage techniques affect power levels in smartphones and introduce energy-efficient approaches to reduce energy consumption. We evaluate power degradation at several layers of block I/O, focusing on the block layer and device driver. At each level, we invest...
Conference Paper
Full-text available
We present an experimental study of how storage techniques impact energy consumption in smartphones. We design and implement a system that tracks I/O activities of smartphones in real-time and dynamically changes storage configuration by matching I/O patterns in order to reduce energy consumption. Our system is evaluated on the 20 most popular appl...
Conference Paper
Full-text available
As mobile video traffic is becoming dominant, balancing the mobile video quality and bandwidth usage is a relevant but hard problem. Particularly, in this project, we attempt to reduce the bandwidth usage of video chats through frame rate adaption. The key idea of this project is to save bandwidth through reducing frame rate at the sender and inter...

Questions

Questions (8)
Question
I believe there is an issue with resuming audio in SpriteKit library. Please let me know if you have expertise to discuss this. Thanks! 
Question
Elon Musk says we should be careful of AI and its dominance in future. I'd be interested to see what everyone thinks. Is AI going to rule our world? Google has been working on DayDream, Facebook on bots, etc.
Question
In terms of funding, employment benefits, etc. 
Question
We've seen some mind-blowing success stories in the IoT area, such as Nest being aquired by Google, Smartthings aquired by Samsung, etc. We know that those things are cool and useful. I've used a Nest thermostat, an August smartlock, Philips Hue lights, etc. What do you think are main reasons preveting wide-spread adoption of IoT devices?

Network

Cited By