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Inventing, building, and deploying wireless sensor technologies to address complex problems in society, industry, and ecology

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Jimmy Day

Jimmy Day

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Project Research

Indoor Drones that can Fly in the Dark

MiFly is a self-localization system for drones that works indoors, including in the dark and low-visibility settings. Instead of …
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CAREER: Wirelesss Sensing for In Vivo Medical Devices

This NSF-funded project develops wireless networking systems for deep-tissue micro-implants. The micro-implants may be swallowed or injecte…
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Ocean Connectivity at Ultra-Low Power

Van-Atta Acoustic Backscatter (VAB) is the first technology for ultra-low-power underwater networking and communication, which can transmit…
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Machine learning approach to design acoustic experiences

Machine learning in acoustics is an emerging field with great potential yet to be explored. Previous research includes predicting acoustic …
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Enhancing well-being through low-frequency resonance: a parametric analysis of space geometry

Resonance at low frequencies strongly influences a room's perception of sound, which can enhance or deteriorate the acoustic experience. Pr…
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FuseBot: RF-Visual Mechanical Search

FuseBot is a robotic system that can efficiently find and retrieve both RFID tagged and untagged target objects in line-of-sight, non-line-…
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Augmented Reality with X-Ray Vision

X-AR is an augmented reality (AR) system that gives humans "X-Ray Vision" X-AR is a new AR headset that enables users to see things th…
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Battery-free wireless underwater camera

More than 95% of the ocean has never been observed by humans, even though the ocean plays the largest role in the world's climate system, h…
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Zero-Power Oceans Internet of Things

Our Oceans IoT technologies enable new applications in climate and ecological monitoring, aquaculture, energy, and robotic navigation. …
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RFusion: Robotic Grasping via RF-Visual Sensing and Learning

RFusion is a robotic system that can search for and retrieve items in line-of-sight, non-line-of-sight, and fully occluded settings. It con…
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RF-Grasp: Robotic Grasping of Hidden Objects

 Can robots find and grasp hidden objects?Robots are not capable of handling tasks as simple as restocking grocery store shelves as th…
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Battery-Free Underwater GPS

Can we build a battery-free underwater GPS? While underwater localization is a long-studied problem,  we seek to bring it to batt…
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Scalable and Ultra-Low Power Ocean IoT

We present the design, implementation, and evaluation of 𝑈2𝐵, a technology that enables scalable ad ultra-low power ocean IoT.  At the…
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RF-SCG: Contactless heart recording

RF-SCG is a new system that can capture seismocardiogram (SCG) recordings without requiring any contact with the human body. Such an u…
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Self-Reconfigurable Micro-Implants

New technology for next-generation wireless + batteryless micro-implantsThese wireless batteryless micro-chips can reprogram themselves ins…
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Battery-Free Subsea Internet-of-Things

We present Piezo-Acoustic Backscatter (PAB), the first technology that enables backscatter networking in underwater environments. PAB relie…
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PAB-QAM: Higher-Order Modulation for Underwater Backscatter

PAB-QAM  is a new system that achieves higher-order modulation with the current PAB sensor design. PAB relies on the piezoelectric eff…
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RF-EATS: Food and liquid sensing in practical environments using RFIDs

RF-EATS is a new system that can verify the authenticity of food and liquids in closed containers without opening them or requiring an…
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TurboTrack: 3D backscatter localization for fine-grained robotics

TurboTrack is a 3D localization system for fine-grained robotic tasks, with unique capability to localize backscatter nodes with sub-centim…
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RFIQ: Food quality and safety detection using wireless stickers

​We have developed a wireless system that leverages the inexpensive RFID tags already on hundreds of billions of products to sense potentia…
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Wireless communication from underwater to the air

Did you know that submarines today still cannot wirelessly communicate with airplanes? For decades, communicating between underwater and th…
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In-Vivo Networking: Powering and communicating with tiny battery-free devices inside the body

In-Vivo Networking (IVN) is the new technology that can wirelessly power and communicate with tiny devices implanted deep within the h…
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RFind: Extreme localization for billions of items

Presenting RFind, a new technology that allows us to locate almost any object with extreme accuracy by transforming low-cost, battery-free …
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RFly: Drones that find missing objects using battery-free RFIDs

Can drones find missing items? Every year, companies lose billions of dollars due to misplaced items and faulty inventory records in their …
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Health sensing using wireless signals

Today’s health sensors (which monitor breathing, heartbeats, steps, etc.) require their users to wear them on their bodies. In contrast, ou…
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Seeing Through Walls

Our group develops technologies that can see through walls and perform motion capture through occlusions. To do so, we rely on wireless sig…