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Congratulations KF8ATJ!

Dad and I are still playing radio here but I’ve not made the Extra class hurdle yet.

BLACK SWAN was good last night on 80m. I’m thinking it was long for the intra state guys as they seemed to struggle more than us out here in the far orbits. Got a relay in to make the roster.

Some lids were jamming with QRM. Thoughtless, not intentional, but if you’re curious why there’s some beef with the JT8 crowd that might be some of it.

I’m not sure of the level of detail in the waterfall display but the JS8Call software isn’t nearly as good at showing you your surroundings as FLDigi and maybe because it’s not a multimodal software?

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POTA 100 hunter awards are out.

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As I live here where this sensationalism occured I suppose I’ll weigh in on this squirrel/DEC business.

You cannot by law keep native animals as pets in NY. This is a matter of public health and animal welfare. To take it a step further, when you become an influencer you by definition influence people to do like.

The state would have never stepped in if well known, long standing, and understood rules had not been broken.

While the animals taken and euthanized were pets and beloved, the humans who removed them from our native landscape and infantilized them to the purpose of monetized Internet content are solely at fault for their fate. The DEC could not rehabilitate them to the wild where they belong, nor would anyone want to pay for that.

We live in a society, and that comes with obligations and consequences.

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Tried to get a weather fax and the west coast was all I could pick up and not great but you can see the high pressure and low pressure zones.

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@swradiogram 31OCT24

Welcome to program 376 of Shortwave Radiogram.

I'm Kim Andrew Elliott in Arlington, Virginia USA.

Here is the lineup for today's program, in MFSK modes as noted:

1:43 MFSK32: Program preview (now) 2:51 MFSK32: Daylight saving time linked to lost productivity 8:01 MFSK64: Ultra-thin film absorbs electromagnetic waves* 12:37 MFSK64: This week's images* 28:27 MFSK32: Closing announcements

with image(s)

Please send reception reports to radiogram@verizon.net

And visit http://swradiogram.net

We're on X/Twitter now: @SWRadiogram

 inkt9 

From Phys.org:

Daylight saving time linked to lost worker productivity

Posted by Sherri Buri McDonald University of Oregon October 29, 2024

As much of the world prepares to turn clocks back an hour this fall, new research from the University of Oregon finds the annual spring forward to daylight saving time affects worker productivity more than previously thought.

Rather than affecting workers for just a day or two, the adjustment to daylight saving time can affect worker productivity for up to two weeks, said Glen Waddell, a UO labor economist and co-author of a new research in the Journal of Economic Behavior and Organization. He collaborated on the paper with Andrew Dickinson, a doctoral student in economics in the UO's College of Arts and Sciences.

The researchers did not identify a similar effect in the fall. They found that early-morning productivity picked up following the return to standard time.

Waddell and Dickinson looked at the daily work activity of 174,505 people who used GitHub around the transition to daylight saving time from 2013 to 2019. GitHub is a cloud-based version-control platform used by software developers, engineers and other collaborative programmers. It has 83 million users worldwide.

The publicly available GitHub records enabled the researchers to examine worker activity down to the second.

"When we look inside the day, hour by hour, we're actually able to see patterns of workers getting off to a bumpy start in the early morning and trying to make up for their lost productivity throughout the rest of the afternoon, and this is happening for upwards of two weeks," Waddell said.

Although GitHub users don't represent all workers, they do provide valuable insights into how "losing" an hour in the transition to daylight saving time affected their productivity, he said.

The researchers also looked at the effect on workers when they returned to standard time in the fall.

"We actually see a picking up of productivity in those early morning hours, 8 a.m. to 10 a.m., with the extra sleep being the likely reason," Waddell said.

The paper's findings have direct relevance for the 1.6 billion people in 75 countries who change to daylight saving time each spring and back to standard time each fall.

The research also comes at a time when United States lawmakers are considering abandoning the yearly time change. In 2021, the U.S. Senate unanimously passed the Sunshine Protection Act, which would end the return to standard time for the months of November to March.

"Our research findings could be interpreted as yet more reason to put this clock-switching experiment behind us," Waddell said. "If we were fence-sitters before, maybe this is just another nudge toward the direction of doing away with this practice."

Arizona and Hawaii already remain on standard time all year, and a growing number of countries, including China, Russia, Pakistan and Brazil, also have abandoned daylight saving time.

Introduced in 1916 and soon after adopted by many Western countries, daylight saving time was intended to save energy. However, consensus opinion today finds the energy savings to be negligible, on the order of plus or minus 1%, according to the paper.

Shortwave Radiogram now changes to MFSK64 …

This is Shortwave Radiogram in MFSK64

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From TechXplore:

Ultra-thin film that absorbs nearly all electromagnetic waves could improve reliability of wireless communication

by National Research Council of Science and Technology (South Korea) October 28, 2024

A conceptual diagram of the electromagnetic wave absorption and shielding material developed by the research team, along with the designed conductive pattern. Credit: Korea Institute of Materials Science (KIMS)

The research team of Dr. Byeongjin Park and Dr. Sang Bok Lee from the Composites & Convergence Materials Research Division at the Korea Institute of Materials Science (KIMS), has developed the world's first ultra-thin film composite material capable of absorbing over 99% of electromagnetic waves from various frequency bands (such as 5G/6G, WiFi, and autonomous driving radar) using a single material.

The findings were published as the cover article in the October 1 edition of Advanced Functional Materials.

This electromagnetic wave absorption and shielding material is less than 0.5mm thick and is distinguished by its low reflectance of less than 1% and high absorbance of over 99% across three different frequency bands.

Electromagnetic waves emitted by electronic components can cause interference, leading to performance degradation in other nearby electronic devices.

Electromagnetic shielding materials are used to prevent this, and absorbing electromagnetic waves is more effective at reducing interference than merely reflecting them. However, conventional electromagnetic shielding materials reflect over 90% of the waves, with an actual absorbance often as low as 10%. Moreover, materials with higher absorbance are typically limited to absorbing electromagnetic waves within a single frequency band.

To overcome these limitations, the research team developed a composite material that can absorb electromagnetic waves across multiple frequency bands simultaneously.

This technology absorbs and eliminates electromagnetic waves, resolving secondary interference issues. The material is also thin, flexible, and durable enough to maintain its shape even after being folded and unfolded thousands of times, making it suitable for use in rollable phones and wearable devices.

The team synthesized a magnetic material by altering the crystal structure of ferrite, enabling it to selectively absorb desired frequencies. They produced an ultra-thin polymer composite film and incorporated conductive patterns on the film's back side to control the propagation of electromagnetic waves.

By adjusting the shape of the conductive pattern, electromagnetic wave reflection at specific frequencies can be dramatically reduced. Additionally, a carbon nanotube thin film with high shielding properties was applied to the back to further enhance the material's electromagnetic wave shielding capabilities.

Senior researcher Byeongjin Park of KIMS, who led the project, said, "As the applications of 5G/6G communications continue to expand, the importance of electromagnetic wave absorption and shielding materials is growing."

He added, "This material has the potential to significantly improve the reliability of wireless communication devices such as smartphones and autonomous vehicle radars."

The research team has completed domestic patent registration and has also applied for patents in the U.S., China, and other countries. Additionally, the technology has been transferred to several domestic material companies, and it is currently being applied to actual communication devices and automobiles.

Image: The electromagnetic wave absorption and shielding material, showing its thin and flexible form and its shape remaining intact even after 5,000 bending tests …



This is Shortwave Radiogram in MFSK64

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This week's images …



This is Shortwave Radiogram in MFSK32 …

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and

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Twitter: @SWRadiogram or twitter.com/swradiogram

I'm Kim Elliott. Please join us for the next Shortwave Radiogram.

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80m was a little wiggly last nite.

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More Ithaca wandering

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Rerun from @swradiogram but great reception tonite. 7.780 MHz

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4050 miles on 5 watts! DF2GN was an active POTA station in Germany and waiting for the band to rise it was a 559 contact!

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Some sights around the office today.

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It’s probably not meant to be pronounced but I’d have picked something else myself.

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Still a little time left to make some contacts during the October Street key sprint. I made two tonight and heard many more. 40 m was fishing in a barrel kind of territory. 20 m had some fun DX, but I didn’t have the time.

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21OCT24

Fldigi has an update

XX.xx.6

FLamp as well.

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It was JOTA jamboree on the air weekend and NYS QSO party too.

Got a CA station on 15m with my QRP rig 2400 miles away isn’t too shabby.