+ Metamaterial Design and Fabrication
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-
Metamaterial Design and Fabrication
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-
-
+
The Greek roots of metamaterial - beyond matter - convey the promise of ongoing research into this new branch of material science. Through advanced additive manufacturing techniques, we create metamaterials with controlled microstructures that drive macro-scale mechanical properties not found in natural materials.
We create software tools to precisely specify the design of a metamaterial at the length scale of tens of microns. Applications of these materials are wide and not fully explored.
Our software pipeline enables the fabrication of materials with strongly anisotropic damping properties, tunable elastic and viscoelastic properties, locally varying stiffness and buckling responses, and dynamically adjustable stiffness.
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+
+
+
+ Lattices with Dynamically Alterable Stiffness Properties
-### Lattices with Dynamically Alterable Stiffness Properties
-
-
-
-
+
Dynamically adjustable material properties are an interesting field of research and additive manufacturing allows for rapid development of metamaterials that exhibit interesting properties. One such example is that with 3D printing we can make hollow lattice structures that can be stiffened by inflating the lattice tubes.
-
+
diff --git a/_pages/biotracking.md b/_pages/biotracking.md
index a80ff1f..e14b10f 100644
--- a/_pages/biotracking.md
+++ b/_pages/biotracking.md
@@ -9,64 +9,59 @@ selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-### Terrestrial Autonomous Acoustic Recorder
-
-
-
+
+
+ Terrestrial Autonomous Acoustic Recorder
Like the marine application above, terrestrial acoustic signals can be used to assess wildlife behavior, including abundance, and spatio-temporal patterns. Synchronized recorders permit arrival-time based estimates of position.
-
+
-### Autonomous Ocean-bottom Acoustic Recorder ("popup")
-
-
-
+
+
+ Autonomous Ocean-bottom Acoustic Recorder ("popup")
Marine animals have evolved to utilize acoustic communication; marine animal scientists can exploit natural vocalizations to learn about wildlife behavior without ever interacting with (tagging) the animal. We led a team of engineers at the Cornell Lab of Ornithology who designed a fleet (>200) of underwater recording systems that have been deployed throughout the world's oceans. After deployment, these recorders sit on the ocean floor, recording according to a schedule, and can do so for more than a year. When commanded to resurface, the "popup" releases an anchor and floats back to the surface for retrieval, after which its data can be read.
-
+
-### Software-defined Tags
-
-
-
+
+
+ Software-defined Tags
Existing wildlife monitoring devices (tags) are special-purpose custom designed tools that are built specifically for a particular user or experiment. This makes them slow to produce, expensive, and difficult to adapt to new study scenarios or technological changes. Instead, we have recently designed and built a software-defined tag that is very lightweight (300mg) and is solar-powered, allowing an indefinite lifetime. This tag can be adapted for use with existing tracking receivers (OOK), data telemetry receivers (ASK,FSK,FM), or with time-of-arrival receivers.
-
+
-### Energy Harvesting
-
-
-
+
+
+ Energy Harvesting
Free-flying organisms can carry a small percentage of their body mass as additional payload; for birds the widely-used guideline is 3%. This means that roughly half of all bird species can carry no more than 1 gram of added payload, which imposes a very tight mass budget on the design of any systems added to them in order to monitor their behavior. The mass-specific energy density of electro-chemical batteries has improved slowly over the years, but there is currently no battery than can provide sufficient energy storage per gram to enable multi-year tag lifetimes, a duration which has significant behavioral relevance. For this reason, we have investigated and developed various forms of energy harvesting as a supplement to tag batteries, focusing on vibration harvesting (for nocturnal animals) and solar harvesting. Because the exact amount of energy that will be harvested during the tag's deployment cannot be known a priori, this work also incorporates energy-aware computing to manage the energy stored on the tag.
-
+
-### Time-of-arrival Tracking
-
-
-
-
+
+
+ Time-of-arrival Tracking
+
Location information is a requirement common to many applications, and though GPS is now a ubiquitous technology, the size, cost and energy consumption of GPS receivers limit their use. For example, fewer than 15 percent of bird species are large enough to carry currently available GPS trackers, which require a relatively heavy battery. To address this limitation, we designed and built an alternative radio-frequency locating system that uses pseudorandom-encoded transmissions from very small mobile units (tags) to locate mobile transmitters using a matched filter detector approach based on time-of-arrival. This method uses 1000x less energy at the tag than GPS, is capable of tracking several hundred transmitters simultaneously with no operator intervention, has high spatiotemporal resolution (+/- 10 m, 1 second position updates), and uses tags (Fig 5.A) that are inexpensive (<$50), long-lived (years), and lightweight ( less than 1 gram)
-
+
diff --git a/_pages/other.md b/_pages/other.md
index 4e8bce2..81595a2 100644
--- a/_pages/other.md
+++ b/_pages/other.md
@@ -8,14 +8,12 @@ news: true # includes a list of news items
selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-
-### Rapid Development of Bag Valve Mask Actuator
-
-
-
+
+
+ Rapid Development of Bag Valve Mask Actuator
As coronavirus disease 2019 rapidly spread across the globe many hospitals lacked the necessary supplies to treat all of the incoming cases. The virus proved to be deadly and to address the large number of cases rapid prototyping and manufacturing was implemented. UCHealth Memorial Hospital approached the robotics laboratory in the mechanical engineering department of the University of Colorado Boulder to rapidly design a bag valve mask compressor in anticipation of a shortage of incubators on the projected peak case day of April 17th. A collaboration between the Matter Assembly through Computation (MAC) lab, the Advanced Medical Technologies Lab (AMTL), and the Bio-Inspired Perception and Robotics Lab (BPRL) produced two prototypes for the hospital to pass through their IRB. One of these designs was a digitally controlled compression device.
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+
diff --git a/_pages/presurgical-planning-models.md b/_pages/presurgical-planning-models.md
index 685cec3..f6fa6ba 100644
--- a/_pages/presurgical-planning-models.md
+++ b/_pages/presurgical-planning-models.md
@@ -9,15 +9,14 @@ selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-### 3DP Presurgical Planning Models
-
-
-
+
+
+ 3DP Presurgical Planning Models
We develop software workflows and advanced multimaterial 3D printing capabilities for fabricating patient-specific presurgical models with our partners at CU Anschutz. These models help surgeons plan surgical procedures and visualize complex 3D tissue structures.
Voxel Printing Anatomy: Design and Fabrication of Realistic, Presurgical Planning Models through Bitmap Printing
-
+
+
The Greek roots of metamaterial - beyond matter - convey the promise of ongoing research into this new branch of material science. Through advanced additive manufacturing techniques, we create metamaterials with controlled microstructures that drive macro-scale mechanical properties not found in natural materials.
We create software tools to precisely specify the design of a metamaterial at the length scale of tens of microns. Applications of these materials are wide and not fully explored.
Our software pipeline enables the fabrication of materials with strongly anisotropic damping properties, tunable elastic and viscoelastic properties, locally varying stiffness and buckling responses, and dynamically adjustable stiffness.
- We create software tools to precisely specify the design of a metamaterial at the length scale of tens of microns. Applications of these materials are wide and not fully explored.
Our software pipeline enables the fabrication of materials with strongly anisotropic damping properties, tunable elastic and viscoelastic properties, locally varying stiffness and buckling responses, and dynamically adjustable stiffness.
+
+
+
+ Lattices with Dynamically Alterable Stiffness Properties
-### Lattices with Dynamically Alterable Stiffness Properties
-
-
-
Lattices with Dynamically Alterable Stiffness Properties
-### Lattices with Dynamically Alterable Stiffness Properties
-
-
-
-
+
Dynamically adjustable material properties are an interesting field of research and additive manufacturing allows for rapid development of metamaterials that exhibit interesting properties. One such example is that with 3D printing we can make hollow lattice structures that can be stiffened by inflating the lattice tubes.
-
+
diff --git a/_pages/biotracking.md b/_pages/biotracking.md
index a80ff1f..e14b10f 100644
--- a/_pages/biotracking.md
+++ b/_pages/biotracking.md
@@ -9,64 +9,59 @@ selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-### Terrestrial Autonomous Acoustic Recorder
-
-
-
+
+
+ Terrestrial Autonomous Acoustic Recorder
Like the marine application above, terrestrial acoustic signals can be used to assess wildlife behavior, including abundance, and spatio-temporal patterns. Synchronized recorders permit arrival-time based estimates of position.
-
+
-### Autonomous Ocean-bottom Acoustic Recorder ("popup")
-
-
-
+
+
+ Autonomous Ocean-bottom Acoustic Recorder ("popup")
Marine animals have evolved to utilize acoustic communication; marine animal scientists can exploit natural vocalizations to learn about wildlife behavior without ever interacting with (tagging) the animal. We led a team of engineers at the Cornell Lab of Ornithology who designed a fleet (>200) of underwater recording systems that have been deployed throughout the world's oceans. After deployment, these recorders sit on the ocean floor, recording according to a schedule, and can do so for more than a year. When commanded to resurface, the "popup" releases an anchor and floats back to the surface for retrieval, after which its data can be read.
-
+
-### Software-defined Tags
-
-
-
+
+
+ Software-defined Tags
Existing wildlife monitoring devices (tags) are special-purpose custom designed tools that are built specifically for a particular user or experiment. This makes them slow to produce, expensive, and difficult to adapt to new study scenarios or technological changes. Instead, we have recently designed and built a software-defined tag that is very lightweight (300mg) and is solar-powered, allowing an indefinite lifetime. This tag can be adapted for use with existing tracking receivers (OOK), data telemetry receivers (ASK,FSK,FM), or with time-of-arrival receivers.
-
+
-### Energy Harvesting
-
-
-
+
+
+ Energy Harvesting
Free-flying organisms can carry a small percentage of their body mass as additional payload; for birds the widely-used guideline is 3%. This means that roughly half of all bird species can carry no more than 1 gram of added payload, which imposes a very tight mass budget on the design of any systems added to them in order to monitor their behavior. The mass-specific energy density of electro-chemical batteries has improved slowly over the years, but there is currently no battery than can provide sufficient energy storage per gram to enable multi-year tag lifetimes, a duration which has significant behavioral relevance. For this reason, we have investigated and developed various forms of energy harvesting as a supplement to tag batteries, focusing on vibration harvesting (for nocturnal animals) and solar harvesting. Because the exact amount of energy that will be harvested during the tag's deployment cannot be known a priori, this work also incorporates energy-aware computing to manage the energy stored on the tag.
-
+
-### Time-of-arrival Tracking
-
-
-
-
+
+
+ Time-of-arrival Tracking
+
Location information is a requirement common to many applications, and though GPS is now a ubiquitous technology, the size, cost and energy consumption of GPS receivers limit their use. For example, fewer than 15 percent of bird species are large enough to carry currently available GPS trackers, which require a relatively heavy battery. To address this limitation, we designed and built an alternative radio-frequency locating system that uses pseudorandom-encoded transmissions from very small mobile units (tags) to locate mobile transmitters using a matched filter detector approach based on time-of-arrival. This method uses 1000x less energy at the tag than GPS, is capable of tracking several hundred transmitters simultaneously with no operator intervention, has high spatiotemporal resolution (+/- 10 m, 1 second position updates), and uses tags (Fig 5.A) that are inexpensive (<$50), long-lived (years), and lightweight ( less than 1 gram)
-
+
diff --git a/_pages/other.md b/_pages/other.md
index 4e8bce2..81595a2 100644
--- a/_pages/other.md
+++ b/_pages/other.md
@@ -8,14 +8,12 @@ news: true # includes a list of news items
selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-
-### Rapid Development of Bag Valve Mask Actuator
-
-
-
+
+
+ Rapid Development of Bag Valve Mask Actuator
As coronavirus disease 2019 rapidly spread across the globe many hospitals lacked the necessary supplies to treat all of the incoming cases. The virus proved to be deadly and to address the large number of cases rapid prototyping and manufacturing was implemented. UCHealth Memorial Hospital approached the robotics laboratory in the mechanical engineering department of the University of Colorado Boulder to rapidly design a bag valve mask compressor in anticipation of a shortage of incubators on the projected peak case day of April 17th. A collaboration between the Matter Assembly through Computation (MAC) lab, the Advanced Medical Technologies Lab (AMTL), and the Bio-Inspired Perception and Robotics Lab (BPRL) produced two prototypes for the hospital to pass through their IRB. One of these designs was a digitally controlled compression device.
-
+
diff --git a/_pages/presurgical-planning-models.md b/_pages/presurgical-planning-models.md
index 685cec3..f6fa6ba 100644
--- a/_pages/presurgical-planning-models.md
+++ b/_pages/presurgical-planning-models.md
@@ -9,15 +9,14 @@ selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-### 3DP Presurgical Planning Models
-
-
-
+
+
+ 3DP Presurgical Planning Models
We develop software workflows and advanced multimaterial 3D printing capabilities for fabricating patient-specific presurgical models with our partners at CU Anschutz. These models help surgeons plan surgical procedures and visualize complex 3D tissue structures.
Voxel Printing Anatomy: Design and Fabrication of Realistic, Presurgical Planning Models through Bitmap Printing
-
+
+
Dynamically adjustable material properties are an interesting field of research and additive manufacturing allows for rapid development of metamaterials that exhibit interesting properties. One such example is that with 3D printing we can make hollow lattice structures that can be stiffened by inflating the lattice tubes.
-
+
diff --git a/_pages/biotracking.md b/_pages/biotracking.md
index a80ff1f..e14b10f 100644
--- a/_pages/biotracking.md
+++ b/_pages/biotracking.md
@@ -9,64 +9,59 @@ selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-### Terrestrial Autonomous Acoustic Recorder
-
-
-
+
+
-### Autonomous Ocean-bottom Acoustic Recorder ("popup") - -
+
- Terrestrial Autonomous Acoustic Recorder
Like the marine application above, terrestrial acoustic signals can be used to assess wildlife behavior, including abundance, and spatio-temporal patterns. Synchronized recorders permit arrival-time based estimates of position.
+
-### Autonomous Ocean-bottom Acoustic Recorder ("popup") - -
-
+
+
-### Software-defined Tags - -
+
- Autonomous Ocean-bottom Acoustic Recorder ("popup")
Marine animals have evolved to utilize acoustic communication; marine animal scientists can exploit natural vocalizations to learn about wildlife behavior without ever interacting with (tagging) the animal. We led a team of engineers at the Cornell Lab of Ornithology who designed a fleet (>200) of underwater recording systems that have been deployed throughout the world's oceans. After deployment, these recorders sit on the ocean floor, recording according to a schedule, and can do so for more than a year. When commanded to resurface, the "popup" releases an anchor and floats back to the surface for retrieval, after which its data can be read.
+
-### Software-defined Tags - -
-
+
+
-### Energy Harvesting - -
+
- Software-defined Tags
Existing wildlife monitoring devices (tags) are special-purpose custom designed tools that are built specifically for a particular user or experiment. This makes them slow to produce, expensive, and difficult to adapt to new study scenarios or technological changes. Instead, we have recently designed and built a software-defined tag that is very lightweight (300mg) and is solar-powered, allowing an indefinite lifetime. This tag can be adapted for use with existing tracking receivers (OOK), data telemetry receivers (ASK,FSK,FM), or with time-of-arrival receivers.
+
-### Energy Harvesting - -
-
+
+
-### Time-of-arrival Tracking - - -
+
- Energy Harvesting
Free-flying organisms can carry a small percentage of their body mass as additional payload; for birds the widely-used guideline is 3%. This means that roughly half of all bird species can carry no more than 1 gram of added payload, which imposes a very tight mass budget on the design of any systems added to them in order to monitor their behavior. The mass-specific energy density of electro-chemical batteries has improved slowly over the years, but there is currently no battery than can provide sufficient energy storage per gram to enable multi-year tag lifetimes, a duration which has significant behavioral relevance. For this reason, we have investigated and developed various forms of energy harvesting as a supplement to tag batteries, focusing on vibration harvesting (for nocturnal animals) and solar harvesting. Because the exact amount of energy that will be harvested during the tag's deployment cannot be known a priori, this work also incorporates energy-aware computing to manage the energy stored on the tag.
+
-### Time-of-arrival Tracking - - -
-
+
+
+
- Time-of-arrival Tracking +
Location information is a requirement common to many applications, and though GPS is now a ubiquitous technology, the size, cost and energy consumption of GPS receivers limit their use. For example, fewer than 15 percent of bird species are large enough to carry currently available GPS trackers, which require a relatively heavy battery. To address this limitation, we designed and built an alternative radio-frequency locating system that uses pseudorandom-encoded transmissions from very small mobile units (tags) to locate mobile transmitters using a matched filter detector approach based on time-of-arrival. This method uses 1000x less energy at the tag than GPS, is capable of tracking several hundred transmitters simultaneously with no operator intervention, has high spatiotemporal resolution (+/- 10 m, 1 second position updates), and uses tags (Fig 5.A) that are inexpensive (<$50), long-lived (years), and lightweight ( less than 1 gram)
+
diff --git a/_pages/other.md b/_pages/other.md
index 4e8bce2..81595a2 100644
--- a/_pages/other.md
+++ b/_pages/other.md
@@ -8,14 +8,12 @@ news: true # includes a list of news items
selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-
-### Rapid Development of Bag Valve Mask Actuator
-
-
-
+
+
+
- Rapid Development of Bag Valve Mask Actuator
As coronavirus disease 2019 rapidly spread across the globe many hospitals lacked the necessary supplies to treat all of the incoming cases. The virus proved to be deadly and to address the large number of cases rapid prototyping and manufacturing was implemented. UCHealth Memorial Hospital approached the robotics laboratory in the mechanical engineering department of the University of Colorado Boulder to rapidly design a bag valve mask compressor in anticipation of a shortage of incubators on the projected peak case day of April 17th. A collaboration between the Matter Assembly through Computation (MAC) lab, the Advanced Medical Technologies Lab (AMTL), and the Bio-Inspired Perception and Robotics Lab (BPRL) produced two prototypes for the hospital to pass through their IRB. One of these designs was a digitally controlled compression device.
+
diff --git a/_pages/presurgical-planning-models.md b/_pages/presurgical-planning-models.md
index 685cec3..f6fa6ba 100644
--- a/_pages/presurgical-planning-models.md
+++ b/_pages/presurgical-planning-models.md
@@ -9,15 +9,14 @@ selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
-### 3DP Presurgical Planning Models
-
-
-
+
+
+
Voxel Printing Anatomy: Design and Fabrication of Realistic, Presurgical Planning Models through Bitmap Printing
- 3DP Presurgical Planning Models
We develop software workflows and advanced multimaterial 3D printing capabilities for fabricating patient-specific presurgical models with our partners at CU Anschutz. These models help surgeons plan surgical procedures and visualize complex 3D tissue structures.Voxel Printing Anatomy: Design and Fabrication of Realistic, Presurgical Planning Models through Bitmap Printing
+