Unknown Device in Windows 8 on Dell Vostro 3500

On a clean install of Windows 8 or 8.1 on a Dell Vostro 3500, you may notice an Unknown device listed under Other devices in Device Manager:

Unknown device

Under Driver Details, you should also see (ACPI\SMO8800\1):


This unknown device is actually the ST Microelectronics Free Fall Sensor. While the last supported operating system for this machine is Windows 7, you can install a generic version of the driver from the Dell KB article: Sudden Motion Sensor drivers are not installed in Windows 8 and Windows 8.1.

How Developers Visualize Compiler Messages

Explanatory Visualization for Ambiguous Reference

Our paper, How Developers Visualize Compiler Messages: A Foundational Approach to Notification Construction, has been accepted to the 2nd IEEE Working Conference on Software Visualization (VISSOFT 2014).

The abstract of the paper follows:

Self-explanation is one cognitive strategy through which developers comprehend error notifications. Self-explanation, when left solely to developers, can result in a significant loss of productivity because humans are imperfect and bounded in their cognitive abilities. We argue that modern IDEs offer limited visual affordances for aiding developers with self-explanation, because compilers do not reveal their reasoning about the causes of errors to the developer.

The contribution of our paper is a foundational set of visual annotations that aid developers in better comprehending error messages when compilers expose their internal reasoning. We demonstrate through a user study of 28 undergraduate Software Engineering students that our annotations align with the way in which developers self-explain error notifications. We show that these annotations allow developers to give significantly better self-explanations when compared against today’s dominant visualization paradigm, and that better self-explanations yield better mental models of notifications.

The results of our work suggest that the diagrammatic techniques developers use to explain problems can serve as an effective foundation for how IDEs should visually communicate to developers.

Improving Error Notification Comprehension through Visual Overlays in IDEs

My graduate consortium submission, Improving Error Notification Comprehension through Visual Overlays in IDEs has been accepted to the IEEE Symposium on Visual Languages and Human-Centric Computing (VL/HCC) in Melbourne, Australia. The abstract of the paper follows:

Error notifications, as presented by modern integrated development environments, are cryptic and confusing to developers. My dissertation research will demonstrate that modifying production compilers to expose detailed semantics about compilation errors is feasible, and that these semantics can be leveraged through diagrammatic representations using visual overlays on the source code to significantly improve compiler error notification comprehension.

Google Internship Redux


I’m returning to Mountain View, California this summer to intern for Google, from June 16 to September 5. This time around, I will be working with the Knowledge: Translate team on interactive visualizations applied to the domain of machine learning.

Compiler Error Notifications Revisited

Our paper, Compiler Error Notifications Revisited: An Interaction-First Approach for Helping Developers More Effectively Comprehend and Resolve Error Notifications, has been accepted to ICSE 2014: New Ideas and Emerging Results.

Interaction Framework

The abstract of the paper follows:

Error notifications and their resolutions, as presented by modern IDEs, are still cryptic and confusing to developers. We propose an interaction-first approach to help developers more effectively comprehend and resolve compiler error notifications through a conceptual interaction framework. We propose novel taxonomies that can serve as controlled vocabularies for compiler notifications and their resolutions. We use preliminary taxonomies to demonstrate, through a prototype IDE, how the taxonomies make notifications and their resolutions more consistent and unified.

Windows could not search for new updates

Add me to the list of annoyed users who are receiving Code 80244FFF with no resolution from Microsoft (at least, Microsoft does not seem to have acknowledged the problem).


I’ve tried the following options so far, and am open to other suggestions:


Update: After applying the Windows 8.1 Update, I now receive Code 80240442. So all I’ve really done is trade one error code for another.

There does seem to be a workaround for this issue, but it involves temporarily modifying your Internet Options when wanting to run Windows Update. First, find Internet Options, either through the Start Menu or under Control Panel:

Internet Options

Then, go under the Connections tab and click LAN settings. Check “Use a proxy server for your LAN”:

LAN Settings

Click Advanced, and enter the following settings:

Proxy Settings

For HTTP and Secure, use for the “Proxy address to use” and 8888 for the port. Under Exceptions, type <-loopback>.

You may have to reboot your machine. Then, run Windows Update as you normally would.

Frontiers in Education

Frontiers in Education
This week I attended the Frontiers in Education conference (October 23-26) in Oklahoma City, Oklahoma, where I presented my work on A Community College Blended Learning Classroom Experience through Artificial Intelligence in Games. This is my first Computer Science Education paper.

The paper reports on the experience of teaching an industry-validated course on Artificial Intelligence in Computer Games within the Simulation and Game Design department at a two-year community college during a 16-week semester. The course format used a blended learning just-in-time teaching approach, which included active learning programming exercises and one-on-one student interactions.