#3-D printing

[pansy-moon]

being an anthropology major in university means you’re a little TOO aware of the current trends in academia since you’re conditioned to look for them.

for example: i had three podcast assignments last semester and now have at least two 3-D printing assignments… i’m not sure if i’m impressed or horrified

[jcmarchi]

Interactive mouthpiece opens new opportunities for health data, assistive technology, and hands-free interactions

New Post has been published on https://thedigitalinsider.com/interactive-mouthpiece-opens-new-opportunities-for-health-data-assistive-technology-and-hands-free-interactions/

Interactive mouthpiece opens new opportunities for health data, assistive technology, and hands-free interactions

When you think about hands-free devices, you might picture Alexa and other voice-activated in-home assistants, Bluetooth earpieces, or asking Siri to make a phone call in your car. You might not imagine using your mouth to communicate with other devices like a computer or a phone remotely. 

Thinking outside the box, MIT Computer Science and Artificial Intelligence Laboratory (CSAIL) and Aarhus University researchers have now engineered “MouthIO,” a dental brace that can be fabricated with sensors and feedback components to capture in-mouth interactions and data. This interactive wearable could eventually assist dentists and other doctors with collecting health data and help motor-impaired individuals interact with a phone, computer, or fitness tracker using their mouths.

Resembling an electronic retainer, MouthIO is a see-through brace that fits the specifications of your upper or lower set of teeth from a scan. The researchers created a plugin for the modeling software Blender to help users tailor the device to fit a dental scan, where you can then 3D print your design in dental resin. This computer-aided design tool allows users to digitally customize a panel (called PCB housing) on the side to integrate electronic components like batteries, sensors (including detectors for temperature and acceleration, as well as tongue-touch sensors), and actuators (like vibration motors and LEDs for feedback). You can also place small electronics outside of the PCB housing on individual teeth.

Play video

MouthIO: Fabricating Customizable Oral User Interfaces with Integrated Sensing and Actuation Video: MIT CSAIL

The active mouth

“The mouth is a really interesting place for an interactive wearable and can open up many opportunities, but has remained largely unexplored due to its complexity,” says senior author Michael Wessely, a former CSAIL postdoc and senior author on a paper about MouthIO who is now an assistant professor at Aarhus University. “This compact, humid environment has elaborate geometries, making it hard to build a wearable interface to place inside. With MouthIO, though, we’ve developed a new kind of device that’s comfortable, safe, and almost invisible to others. Dentists and other doctors are eager about MouthIO for its potential to provide new health insights, tracking things like teeth grinding and potentially bacteria in your saliva.”

The excitement for MouthIO’s potential in health monitoring stems from initial experiments. The team found that their device could track bruxism (the habit of grinding teeth) by embedding an accelerometer within the brace to track jaw movements. When attached to the lower set of teeth, MouthIO detected when users grind and bite, with the data charted to show how often users did each.

Wessely and his colleagues’ customizable brace could one day help users with motor impairments, too. The team connected small touchpads to MouthIO, helping detect when a user’s tongue taps their teeth. These interactions could be sent via Bluetooth to scroll across a webpage, for example, allowing the tongue to act as a “third hand” to open up a new avenue for hands-free interaction.

“MouthIO is a great example how miniature electronics now allow us to integrate sensing into a broad range of everyday interactions,” says study co-author Stefanie Mueller, the TIBCO Career Development Associate Professor in the MIT departments of Electrical Engineering and Computer Science and Mechanical Engineering and leader of the HCI Engineering Group at CSAIL. “I’m especially excited about the potential to help improve accessibility and track potential health issues among users.”

Molding and making MouthIO

To get a 3D model of your teeth, you can first create a physical impression and fill it with plaster. You can then scan your mold with a mobile app like Polycam and upload that to Blender. Using the researchers’ plugin within this program, you can clean up your dental scan to outline a precise brace design. Finally, you 3D print your digital creation in clear dental resin, where the electronic components can then be soldered on. Users can create a standard brace that covers their teeth, or opt for an “open-bite” design within their Blender plugin. The latter fits more like open-finger gloves, exposing the tips of your teeth, which helps users avoid lisping and talk naturally.

This “do it yourself” method costs roughly $15 to produce and takes two hours to be 3D-printed. MouthIO can also be fabricated with a more expensive, professional-level teeth scanner similar to what dentists and orthodontists use, which is faster and less labor-intensive.

Compared to its closed counterpart, which fully covers your teeth, the researchers view the open-bite design as a more comfortable option. The team preferred to use it for beverage monitoring experiments, where they fabricated a brace capable of alerting users when a drink was too hot. This iteration of MouthIO had a temperature sensor and a monitor embedded within the PCB housing that vibrated when a drink exceeded 65 degrees Celsius (or 149 degrees Fahrenheit). This could help individuals with mouth numbness better understand what they’re consuming.

In a user study, participants also preferred the open-bite version of MouthIO. “We found that our device could be suitable for everyday use in the future,” says study lead author and Aarhus University PhD student Yijing Jiang. “Since the tongue can touch the front teeth in our open-bite design, users don’t have a lisp. This made users feel more comfortable wearing the device during extended periods with breaks, similar to how people use retainers.”

The team’s initial findings indicate that MouthIO is a cost-effective, accessible, and customizable interface, and the team is working on a more long-term study to evaluate its viability further. They’re looking to improve its design, including experimenting with more flexible materials, and placing it in other parts of the mouth, like the cheek and the palate. Among these ideas, the researchers have already prototyped two new designs for MouthIO: a single-sided brace for even higher comfort when wearing MouthIO while also being fully invisible to others, and another fully capable of wireless charging and communication.

Jiang, Mueller, and Wessely’s co-authors include PhD student Julia Kleinau, master’s student Till Max Eckroth, and associate professor Eve Hoggan, all of Aarhus University. Their work was supported by a Novo Nordisk Foundation grant and was presented at ACM’s Symposium on User Interface Software and Technology.

[kingsbridgelibraryteens]

Here’s a sneak peek at the 3-D printer that we’ve been using for our children’s STEAM programs! Each printout takes several hours, so in between programs, we’re printing out the kids’ designs.

Here’s what it looks like in action:

And then … VOILA … a new design emerges!

We still have this printer for a few more months. Visit our website to see when we’ll be giving our next 3-D printing program for kids!

[spaceintruderdetector]

This book is essential reading for researchers and practitioners in computer science, technical managers and software specialists This book provides a comprehensive treatment of the subject of sculptured surface machining in terms of user needs, CAM software solutions and theoretical research results and issues. State-of-the-art capabilities of the best commercial CAM systems are compared to user needs, and advanced academic research is presented. Among the topics covered are the following: Generative NC for dies and molds; 5-axis machining of impellers; Cutting simulation and NC verification; Virtual machining; CAPP for die and mold machining; NURBS-based CNC interpolators 

Cutting Molds/Dies from Scan data

Experiences from a Quantum Leap Improvement in Turbine Manufacturing

A Generative Approach for Die Pattern Machining

Geometric Contributions to 3-Axis Milling of Sculptured Surfaces

Efficiency of Multi-Axis NC Machining of Sculptured Part Surfaces

Best-Fit of Sculptured Surfaces

Point-based Geometric Modelling

Virtual Machining and the Manufacturing Model

Virtual CNC with Performance Error Modeling

Fast Simulation of Sculptured Surface Milling with 3-Axis NC Machine

Simulation of Ball-nose End Milling Operations — Selection of Geometric Resolution Parameters

Machining Process Modeling for Intelligent Rough Machining of Sculptured Parts

Bridging the Gap Between Tool Path Generation for Sculptured Surface Machining and Computer Aided Process Modelling Techniques

Automatic Five-Axis CNC Feedrate Selection via Discrete Mechanistic, Geometric, and Machine Model Integration

Milling Simulation with an adaptive Strategy

Deformed Swept Volume Analysis to NC Machining Simulation with Cutter Deflection

Segmentation and Surface Fitting in Reverse Engineering

Surface Reconstruction from Point Clouds

Reverse Engineering Employing a Wrap-Around SurfaceTriangle Set

Manufacturability of Reverse Engineered CAD-models : a case study

https://archive.org/details/springer_10.1007-978-0-387-35392-0

[t-jfh]

Maybe in Your Lifetime, People Will Live on the Moon and Then Mars

Through partnerships and 3-D printing, NASA is plotting how to build houses on the moon by 2040.

By Debra Kamin

Reporting from NASA’s Marshall Space Flight Center in Huntsville, Alabama.

The New York Times - October 1, 2023

[tomorrowusa]

Ukrainians are ingenious. By necessity they are using their own resources to improve on existing military technology.

We've already seen the success of their upgraded drones (both air and sea) and the R-360 Neptun missile.

Their 3-D printed anti-mine boots are an example of developing defensive military technology. Not only are they more effective, but they are cheaper than Western imports.

[wipro-3d]

Design For Additive Manufacturing (DFAM) - Wipro 3D

Wipro 3D design for Additive Manufacturing (DfAM) can transform your metal 3D printing process.Our DFAM expertise enables you to optimize product design, reduce production time, and achieve greater accuracy.

[ryonello]

im playing my favorite dating sim again 💌

[jcmarchi]

Detachable cardiac pacing lead may improve safety for cardiac patients

New Post has been published on https://thedigitalinsider.com/detachable-cardiac-pacing-lead-may-improve-safety-for-cardiac-patients/

Detachable cardiac pacing lead may improve safety for cardiac patients

In 2012, Neil Armstrong, the first man to walk on the moon, died of post-surgery complications at the age of 82 following what should have been a routine heart surgery. Armstrong had undergone bypass surgery, the most common open-heart operation in the United States, and a surgery where the overall chance of death has dropped to almost zero.

Armstrong’s death was caused by heart damage that occurred during the removal of temporary cardiac pacing leads. Pacing leads are routinely used to monitor patients and protect against the risk of postoperative arrhythmias, including complete blockages, during the recovery period after cardiac surgery. However, because current methods rely on surgical suturing or direct insertion of electrodes to the heart tissue, trauma can occur during implantation and removal, increasing the potential for damage, bleeding, and device failure.

A coffee chat in 2019 about Armstrong’s untimely death helped inspire new research, published in the journal Science Translational Medicine. The research demonstrates findings that may offer a promising new platform for adhesive bioelectronic devices for cardiac monitoring, diagnosis, and treatment, and offer inspiration for the future development of bioadhesive electronics.

“While discussing the story, our team had a eureka moment that we probably could do something to prevent such complications by realizing a completely atraumatic version of it based on our bioadhesive technologies,” says Hyunwoo Yuk SM ’16, PhD ’21, a former MIT research scientist who is now the chief technology officer at SanaHeal. “It was such an exciting idea, and the rest was just making it happen.”

The team, comprising researchers affiliated with the lab of Xuanhe Zhao, professor of mechanical engineering and of civil and environmental engineering, has introduced a 3D-printable bioadhesive pacing lead that can directly interface with cardiac tissue, supporting minimally invasive adhesive implantation and providing a detachment solution that allows for gentle removal. Yuk and Zhao are the corresponding authors of the study; former MIT researcher Jue Deng is the paper’s first author.

“This work introduces the first on-demand detachable bioadhesive version of temporary cardiac pacing lead that offers atraumatic application and removal of the device with enhanced safety while offering improved bioelectronic performance,” says Zhao.

The development of the bioadhesive pacing lead is a combination of technologies that the team has developed over the last several years in the field of bioadhesive, bioelectronics, and 3D printing. SanaHeal, a company born from the team’s ongoing work, is commercializing bioadhesive technologies for various clinical applications.

“We hope that our ongoing effort on commercialization of our bioadhesive technology might help faster clinical translation of our bioadhesive pacing lead as well,” says Yuk.

[littlefluffbutt]

It looks amazing!!!!!

⚡️⚡️⚡️ IT WORKED ⚡️⚡️⚡️

it workedddddddd

I can't believe it! It's SO WEIRD to hold in your hand the thing you saw on the screen.

Holding it in my hand!!!!

And the quality! Holy shit we are living in the future!!!

Though here is the back side where I placed all the supports and was too rambunctious cracking them off and scratched everything up. The raised oval seems to be where I put too many supports close together and they melded together into a lump. I Am Learning Thing!

I am mentally running around with my pants on fire now. Which of the huge queue of things to print next 🔥🫨🔥

[kingsbridgelibraryteens]

Knock knock!

Who’s there?

ORANGE you glad to see our MakerBot 3-D printer in action???

[vamp-bites]

I'll be your mirror, reflect what you are, in case you don't know

(I'll Be Your Mirror by Nico and The Velvet Underground)

[ptr-sqloint]

you too

[alinalal-art]

Commission for Yukari's VA Heather Gonzalez!

Getting paid to draw my girl ship by one of the voice actors was definitely a moment. :D

[triona-tribblescore]

Wanted to practice some rendering sooooo BAM! Even more biker angel to feed the soul uvu <3 (they are boutta ram into at least 10 people)

[ruporas]

tri-trans! happy#tdov 💘