Advertisement · 728 × 90

Posts by Barrett Davis

La Bête à Deux Gnathosomae

Hexadecapodal Intrigue

Ixodidae and (the) Chill

2 hours ago 0 0 0 0
A black and white infrared, panoramic image with the Golden Gate Bridge in the background. Three groups of visitors stand apart from each other. (Left) a young couple looks into each others eyes, (center) a man looks down at his phone (right) a woman flips her hair.

A black and white infrared, panoramic image with the Golden Gate Bridge in the background. Three groups of visitors stand apart from each other. (Left) a young couple looks into each others eyes, (center) a man looks down at his phone (right) a woman flips her hair.

"First Date"

Golden Gate Bridge in 720 nm

#BnW #Infrared #Pano #Photography #California

2 days ago 12 1 0 0
ALA Clean Air School Symposium

NOTE: All times listed below are in Central Time. Agenda times and order of topics are subject to slight change.

10:00 AM: Opening Remarks + The Case for Indoor Air Quality (IAQ)
10:50 AM: Core Elements and the Intersection of IAQ and Energy Efficiency
11:25 AM: Voices from the Field - a Panel Discussion
11:55 AM: Break
12:05 PM: Taking Action: 6 Key Drivers
12:35 PM: How to Make it Happen - Programs and Resources for Schools
12:50 PM: Voices from the Field - a Panel Discussion
1:30 PM: Closing Remarks and Adjourn
Featured Speakers
Speaker list and bios coming soon!

ALA Clean Air School Symposium NOTE: All times listed below are in Central Time. Agenda times and order of topics are subject to slight change. 10:00 AM: Opening Remarks + The Case for Indoor Air Quality (IAQ) 10:50 AM: Core Elements and the Intersection of IAQ and Energy Efficiency 11:25 AM: Voices from the Field - a Panel Discussion 11:55 AM: Break 12:05 PM: Taking Action: 6 Key Drivers 12:35 PM: How to Make it Happen - Programs and Resources for Schools 12:50 PM: Voices from the Field - a Panel Discussion 1:30 PM: Closing Remarks and Adjourn Featured Speakers Speaker list and bios coming soon!

The American Lung Association is hosting a 3.5-hour virtual "Clean Air School Symposium" on May 5.

Register: action.lung.org/site/TR?fr_i...

2 days ago 121 54 1 2

Sadly, applications to the Advanced Python summer school have dropped significantly over the past 2 years.

Plus, there'll be no external funding for the 1st time in *17 years*.

Likely all because of GenAI - but programming skills still matter🔥

Deadline May 3, please help by sharing:
aspp.school

6 days ago 17 20 1 3
Post image

There are Science papers and then there are *I just dropped and shattered my mug of coffee Usual Suspects style* Science papers www.science.org/doi/10.1126/...

4 days ago 95 15 2 1
A full-spectrum photo channel swapped so IR-reflective materials appear yellow. Two event volunteers work on an ultralight plane. A corrugated metal building with pipes and tanks fills the background.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. Two event volunteers work on an ultralight plane. A corrugated metal building with pipes and tanks fills the background.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. A group of event-goers and ROTC students gather around a medical helicopter. A partly cloudy sky contrasts the yellow-scene below with pale, powder blue.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. A group of event-goers and ROTC students gather around a medical helicopter. A partly cloudy sky contrasts the yellow-scene below with pale, powder blue.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. A man sits in a lawn chair by a twin-prop plane looking to the camera. Two groups of event-goers flank him in the mid-ground.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. A man sits in a lawn chair by a twin-prop plane looking to the camera. Two groups of event-goers flank him in the mid-ground.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. A group of two or three people inspect a cutaway section of a KC 135R aerial refueling tanker.

A full-spectrum photo channel swapped so IR-reflective materials appear yellow. A group of two or three people inspect a cutaway section of a KC 135R aerial refueling tanker.

Purdue Aviation Day

Nikon D5100
AF Nikkor 35-70
Tiffen Yellow 12 + CPL

#FullSpectrum #Photography

4 days ago 3 0 0 0
A lone figure stands on a sandy Chicago beach past a pari of upturned boats. Abstract forms -- protesters marching and holding signs -- just begin to bleed into the image's top left corner

A lone figure stands on a sandy Chicago beach past a pari of upturned boats. Abstract forms -- protesters marching and holding signs -- just begin to bleed into the image's top left corner

A black and white photo of the neighbor's very affectionate dog, squeezing through the fence to say hi, while looking both ghastly and world-wise. Signs, arms and faces appear to come out of the aether around the dog.

A black and white photo of the neighbor's very affectionate dog, squeezing through the fence to say hi, while looking both ghastly and world-wise. Signs, arms and faces appear to come out of the aether around the dog.

A (mostly) normal black and white photo of the No Kings protest. The courthouse in Lafayette, IN is framed between a US and Ukranian flag.

A (mostly) normal black and white photo of the No Kings protest. The courthouse in Lafayette, IN is framed between a US and Ukranian flag.

A clearly-double exposed photo of protesters holding signs with dour expressions, while a dog is groomed overhead, shoes and dog toys splayed across the floor.

A clearly-double exposed photo of protesters holding signs with dour expressions, while a dog is groomed overhead, shoes and dog toys splayed across the floor.

Happy accidents in double-exposing a roll of Fuji 400 during the #NoKings protest a few weeks ago

#street #photography #bnw #film

5 days ago 6 2 0 0
A black and white infrared photo of a street corner.

A black and white infrared photo of a street corner.

A black and white infrared photo of a couple crossing the street with their dog. Cable car lines hang overhead.

A black and white infrared photo of a couple crossing the street with their dog. Cable car lines hang overhead.

A black and white infrared photo of a group of kids walking by a bank with large, stately columns.

A black and white infrared photo of a group of kids walking by a bank with large, stately columns.

A black and white infrared photo of a condominium. The shot is flipped upside down to give a sense of vertigo.

A black and white infrared photo of a condominium. The shot is flipped upside down to give a sense of vertigo.

San Francisco in 720 nm

#BnW #Infrared #Photography #UrbanGaze #California

5 days ago 14 2 0 0
A black and white photo of three players running from a building's shadow into a brightly lit crossing. One is holding a cardboard shield.

A black and white photo of three players running from a building's shadow into a brightly lit crossing. One is holding a cardboard shield.

A close-up action shot of a player mid-stride, their nerf blaster held in both hands.

A close-up action shot of a player mid-stride, their nerf blaster held in both hands.

A close up photo of three players in a tactical run towards opposing fire.

A close up photo of three players in a tactical run towards opposing fire.

An unknowing bystander, coffee in hand, is caught in the conflict, surprised to see players holding NERF blasters around the corner

An unknowing bystander, coffee in hand, is caught in the conflict, surprised to see players holding NERF blasters around the corner

Stumbled into a "Campus Clash" NERF battle last weekend while on a photo walk. Shot on Ilford HP5.

1 week ago 1 0 0 0
Video

GIF'd the Artemis II crew's touchdown to the Pacific. Wow!

1 week ago 2 0 0 0
Advertisement
Three parachutes and a space capsule against dark blue ocean.

Three parachutes and a space capsule against dark blue ocean.

🌎 NASA's Artemis II mission has splashed down and all four astronauts are reported safe, bringing an end to a stunning flight around the moon. www.scientificamerican.com/article/nasa...

1 week ago 614 104 8 9
Video

What the last five minutes before reentry look like aboard #Integrity (you can see the plasma build up in the last frame!)

1 week ago 1 0 0 0

Couldn’t agree more, Dean. Good morning from the states!

1 week ago 1 0 1 0
Video

One photo every 15 seconds over the last 30 minutes before NASA's special coverage for #Artemis II started

1 week ago 2 1 1 0
screengrab of live feed of Artemis II as it approaches Earth

screengrab of live feed of Artemis II as it approaches Earth

Losing my mind over this. I have a machine in my lap on which I can periodically toggle over from something else I'm doing on the machine to watch a SPACESHIP return from THE MOON. Earlier I could hear the SPACESHIP'S PEOPLE as they talked to other people LOCATED ON MY PLANET BUT VERY FAR FROM ME.

1 week ago 1385 205 24 13
A screen capture of the Artemis II livestream taken a 16:48 Eastern time. The Integrity's rear thrusters can be seen just overlapping the half of the Earth in nighttime shadow.

A screen capture of the Artemis II livestream taken a 16:48 Eastern time. The Integrity's rear thrusters can be seen just overlapping the half of the Earth in nighttime shadow.

A photo from the Artemis II livestream taken at 17:38 eastern time. One of Integrity's solar panels is now visible. the Earth appears slightly larger.

A photo from the Artemis II livestream taken at 17:38 eastern time. One of Integrity's solar panels is now visible. the Earth appears slightly larger.

Watching the Earth slowly fill more and more of the frame as the #Artemis II crew gets ready for atmospheric reentry.

Just amazing.

1 week ago 1 2 0 0
iHealth 3 in 1 combo packs.

iHealth 3 in 1 combo packs.

Here's a great deal on combo rapid tests that expire in late May. About $20 shipping for a carton of 96 tests. I bought 3 packs and will just give them away to students.

ihealthlabs.com/products/ant...

🧵10 of 10

2 weeks ago 117 78 2 2
View of the spacecraft (bright, on the left), a dark thin crescent of Moon, and a very small, bright thin crescent of Earth next to it

View of the spacecraft (bright, on the left), a dark thin crescent of Moon, and a very small, bright thin crescent of Earth next to it

"Orion, the Moon, and the Earth. EVERYONE, in that picture" - #Artemis II Mission Control.

2 weeks ago 3803 1014 47 79
A rusted metal post sitting at the top of sea cliffs. The sea is choppy. The sky is blue with white clouds. This is a full spectrum infrared photo.

A rusted metal post sitting at the top of sea cliffs. The sea is choppy. The sky is blue with white clouds. This is a full spectrum infrared photo.

A rusted post on a rugged coastline. Anglesey, Wales, earlier today.

#Stunday #infrared #photography #fullspectrum #landscape #scape

2 weeks ago 85 11 2 1
A shot from the highline north down an NYC avenue. Lens compression is extremely evident here, and only made possible by the long focal length.

A shot from the highline north down an NYC avenue. Lens compression is extremely evident here, and only made possible by the long focal length.

A photo of a squirrel sheepishly holding onto a fencepost while appearing to look at the camera.

A photo of a squirrel sheepishly holding onto a fencepost while appearing to look at the camera.

A couple sets up a red kite to fly, contrasting against aqua waters of the pacific in the background. Right before this one of them got down onto a knee, which prompted the snapping (turns out, just unlacing their shoes).

A couple sets up a red kite to fly, contrasting against aqua waters of the pacific in the background. Right before this one of them got down onto a knee, which prompted the snapping (turns out, just unlacing their shoes).

A photo looking south from Chicago's millennium park around sunset. The clouds in the background take on a cotton-candy appearance against green glass skyscrapers and red scaffolded elevators.

A photo looking south from Chicago's millennium park around sunset. The clouds in the background take on a cotton-candy appearance against green glass skyscrapers and red scaffolded elevators.

Some more photos with the 73-300 from I came across from 2022/2023 while migrating photos to my SSD

2 weeks ago 2 0 0 0
Advertisement
A soft, dreamy photo of a pine-laden spit out onto Lake Tahoe from the roadway several hundred feet above. Mountains are visible in the background dissolving into haze and puffy cloud.

A soft, dreamy photo of a pine-laden spit out onto Lake Tahoe from the roadway several hundred feet above. Mountains are visible in the background dissolving into haze and puffy cloud.

A close up photo of a squirrel having a snack in early fall; green and yellow splotches can just be made out in an otherwise bokeh-ball erased background. Rain drops can also be seen in the image, caught mid-air.

A close up photo of a squirrel having a snack in early fall; green and yellow splotches can just be made out in an otherwise bokeh-ball erased background. Rain drops can also be seen in the image, caught mid-air.

A golden sunset photo of two silhouetted people walking by each other at the Albuquerque balloon festival.

A golden sunset photo of two silhouetted people walking by each other at the Albuquerque balloon festival.

A bright, airy photo of the Voss model on Purdue University's campus in early summer. The model is a fiery red/orange/yellow/white metal structure some 30 ft / 10 m in height meant to resemble the sun. It is flanked by green trees and a matte white cloudy sky overhead.

A bright, airy photo of the Voss model on Purdue University's campus in early summer. The model is a fiery red/orange/yellow/white metal structure some 30 ft / 10 m in height meant to resemble the sun. It is flanked by green trees and a matte white cloudy sky overhead.

It was only after I started putting a lot of time into photography that I learned about the lens' reputation among Canon shooters...

While it's no longer my preferred (or only) lens, I still quite like a lot of the photos I've taken with it

2 weeks ago 2 0 1 0
A vibrant closely-cropped photo of yellow, cyan and blue waterslides.

A vibrant closely-cropped photo of yellow, cyan and blue waterslides.

A black and white photo of a duck in a pond. Ripples and mesh structures in teh water give the photo a sense of texture.

A black and white photo of a duck in a pond. Ripples and mesh structures in teh water give the photo a sense of texture.

A black and white photo of two geese floating on steely pond water.

A black and white photo of two geese floating on steely pond water.

A photo of two kids on kit motorbikes. One's bike chain snapped, so the other is pushing them along with an extended foot.

A photo of two kids on kit motorbikes. One's bike chain snapped, so the other is pushing them along with an extended foot.

A walk through a local park with the familiar Canon EF 75-300 mm kit lens

2 weeks ago 4 0 1 0
A black and white panoramic photo of a flooded field. A bare tree stands in the center of the field on its own patchy grass island.

A black and white panoramic photo of a flooded field. A bare tree stands in the center of the field on its own patchy grass island.

Almost a year to the day when I pulled off to the side of a country road for this panorama. April showers have again flooded much of the surrounding farmland.

2 weeks ago 7 1 0 0

"The real threat is a slow, comfortable drift toward not understanding what you're doing. Not a dramatic collapse. Not Skynet. Just a generation of researchers who can produce results but can't produce understanding."

2 weeks ago 2047 648 32 35

It’s like hearing someone claim “I don’t have an accent”.

By simple virtue of telling a story, you’re expressing some set of values and philosophy, whether they‘re personally reflective or not.

3 weeks ago 8 0 0 0
A high contrast black and white long exposure photo (or 1/3s exposure because the photographer didn't bring along an ND filter) of the tail end of the crowd walking across the pedestrian bridge. The courthouse can be seen in the background.

A high contrast black and white long exposure photo (or 1/3s exposure because the photographer didn't bring along an ND filter) of the tail end of the crowd walking across the pedestrian bridge. The courthouse can be seen in the background.

A black and white photo of a woman holding up a paper sign reading "F🖕🏿🖕🏼k Qualified Immunity". Streamers from a kite and their shadows cover the frame from left to right.

A black and white photo of a woman holding up a paper sign reading "F🖕🏿🖕🏼k Qualified Immunity". Streamers from a kite and their shadows cover the frame from left to right.

A man holds a shark kite up to the wind in the background. Two older protesters walk out frame to the right while reading the signs attached to the kite's line. Two younger protesters duck into frame from the left.

A man holds a shark kite up to the wind in the background. Two older protesters walk out frame to the right while reading the signs attached to the kite's line. Two younger protesters duck into frame from the left.

A high contrast black and white photo of a protester holding a small sign that reads "Draft Baron" while looking directly at camera. Their face is partially obscured in shadow from their sign and hat.

A high contrast black and white photo of a protester holding a small sign that reads "Draft Baron" while looking directly at camera. Their face is partially obscured in shadow from their sign and hat.

3 weeks ago 3 1 0 0
A high contrast black and white photo from within the crowd of protesters. A man wearing a keffiyeh holds up a cardboard sign, partially obscuring his face in shadow, that reads "Their greed will kill us all". American flags fill the background.

A high contrast black and white photo from within the crowd of protesters. A man wearing a keffiyeh holds up a cardboard sign, partially obscuring his face in shadow, that reads "Their greed will kill us all". American flags fill the background.

A wider black and white shot of the protesters from above. A sea of signs fills the frame.

A wider black and white shot of the protesters from above. A sea of signs fills the frame.

A black and white photo of a quieter moment from the protest. Concentric rings of people walk and sit around a child atop a circular bench who's holding up a sign that reads "Country before Cult".

A black and white photo of a quieter moment from the protest. Concentric rings of people walk and sit around a child atop a circular bench who's holding up a sign that reads "Country before Cult".

A black and white photo of protesters walking back and forth up a bike / wheel-chair access ramp while holding signs.

A black and white photo of protesters walking back and forth up a bike / wheel-chair access ramp while holding signs.

3 weeks ago 0 0 1 0
Advertisement
A wider shot of the crowd walking towards WL from Lafayette along the pedestrian bridge. Two people in frog costumes cheer from the sides as people hold signs. The courthouse is visible in the background.

A wider shot of the crowd walking towards WL from Lafayette along the pedestrian bridge. Two people in frog costumes cheer from the sides as people hold signs. The courthouse is visible in the background.

A panoramic crop of people holding cardboard anti-war signs: "N[peace sign for o] war" and "All children deserve peace" atop a Palestinian flag.

A panoramic crop of people holding cardboard anti-war signs: "N[peace sign for o] war" and "All children deserve peace" atop a Palestinian flag.

A woman holds a pasteboard sign that reads "Your war crimes don't mask your sex crimes". A person, wholly obscured by a frog costume, holds their hands up, looking like they're feigning shock.

A woman holds a pasteboard sign that reads "Your war crimes don't mask your sex crimes". A person, wholly obscured by a frog costume, holds their hands up, looking like they're feigning shock.

3 weeks ago 0 0 1 0
A close up photo of a cardboard sign painted as the trans flag. The sign reads "TRANS PEOPLE BELONG IN WEST LAFAYETTE".

A close up photo of a cardboard sign painted as the trans flag. The sign reads "TRANS PEOPLE BELONG IN WEST LAFAYETTE".

No Kings Protest!

Saturday, March 28th
Lafayette / West Lafayette, IN

#NoKings #Indivisible #Photography

3 weeks ago 2 1 1 0
Figure 1.1 from Felipe Yasser Elite Guersetti's Doctoral Thesis "Roles of Corrosion Products of Metal Hip Replacements in the Etiology of Adverse Local Tissue Reactions".

Figure 1.1 from Felipe Yasser Elite Guersetti's Doctoral Thesis "Roles of Corrosion Products of Metal Hip Replacements in the Etiology of Adverse Local Tissue Reactions".

No, this study did not assess the efficacy of autoclaves and it did not consider surgical tools.

Instead, the authors placed polyethylene liners on an OR floor, then compared three different disinfecting solutions: CHG, povidone-iodine and 70% ethanol.

(NB: I have no affiliation to the study)

3 weeks ago 0 0 1 0