Ian Kenway @iankenway@social.cleverlibre.org

#Stars, #Dust, and #Gas Near #Antares
#Astronomy #Picture of the Day

https://apod.nasa.gov/apod/ap220126.html

#APOD

Some pictures of what I look like during deco.

#SCUBA #Dive #Diving

An engineers job is never done. I am an Electrical/computer/Rf engineer among many other things. So naturally people are always coming to me to help with tech problems. Today the hotel staff came to me to help them with their wifi. I told the owner in a casual conversation about my background and they were having trouble revamping their wifi with all new access points. So today they asked if i would mind helping out and i joined a meeting with their whole tech staff and explained to them how they can hunt down and measure RFI and setup a good network that covers all the rooms. I just find it funny that even on my vacation im out here leading tech teams and getting shit done.

My view from the restaurant tonight. It inspired me to order lobster.

#SteveBell on #NusratGhani’s claim of #Islamophobia in the #ToryParty – #cartoon | Opinion | The Guardian

For anyone who doesn’t get it, #BorisJohnson is being portrayed as comedian Ken Dodd who was a celebrity in the '60s-'70s.

https://www.theguardian.com/commentisfree/picture/2022/jan/24/steve-bell-on-nusrat-ghanis-claim-of-islamophobia-in-the-tory-party-cartoon

#UK #Politics #Satire

#UK could grow up to 40% of its own #fruit and #vegetables by using #urban green spaces | Vegetables | The Guardian

This is an interesting idea.

https://www.theguardian.com/food/2022/jan/24/uk-could-grow-up-fruit-and-vegetables-urban-green-spaces

#Agriculture #Farming #Food #Environment

There has been a lot of discussion lately, much of it just plain incorrect, about the relationship between resonance and antenna efficiency. Many incorrectly claim that resonance has nothing to do with antenna efficiency at all, similarly others incorrectly claim that resonance is a direct indication of efficiency. Neither of these statements is true. The reality is that resonance does have a significant impact on how efficient your antenna is, but the relationship is highly non-linear and depends on many characteristics.

Below I have attached a chart hat plots out the total radiation resistance (R_r) vs the measured input resistance (R_in) of a dipole. Efficiency is just R_r/R_in. In other words an efficient antenna will have 100% of its resistance as radiation resistance, and R_in is **always** larger than R_r (since it is essentially ohmic resistance plus radiation resistance). When these two numbers differ significantly an antenna is inefficient. The source for the chart below is here and it gives much of the math if you want a deeper dive:

https://nptel.ac.in/content/storage2/courses/108101092/Week-2-Dipole%20Antenna.pdf

What is important to note here is that at anti-resonance we see a **huge** R_in value and a small R_r value, this means an anti-resonant antenna will have very high losses. Keep in mind the graph is very hard to read for the values <0.5 in length because the resolution isnt high. But there is significant divergence there as well. Notice at ~5/8ths wavelength antenna would exhibit very significant internal ohmic losses due to heat.

#hamradio #rf #radio #ee #electronics #electricalrngineering @Electronics

The cover of #PrivateEye

#UK #Satire #Politics #Humour

NCA says end-to-end encryption poses challenge for law enforcers on child abuse | NCA (National Crime Agency) | The Guardian

Typical, if a government wants to bring in an oppressive law that will harm everyone, it couches either in terms of child abuse or terrorism.

Only in the #UK would you have an official government agency called the National Crime Agency. Here we have one which apparently commissions crime.

https://www.theguardian.com/uk-news/2022/jan/22/nca-says-end-to-end-encryption-challenge-law-enforcers

@Pat @freeschool @ligthert @lnxw37a2

As promised, this is the sight at 55 meters / 180 feet under the sea at the sea floor. This is from my dive from today.

Dive profile: https://connect.garmin.com/modern/activity/8161135078

#SCUBa #Dive #Diving #RedSea #Egypt #SharmElSheikh

I dont know who needs to hear this, but Allah is just the arabic word for god. Egyptians speak arabic, so Egyptian christians refer to god as allah. Likewise when most musslims talk about god in english thry refer to him as God not Allah.

This is important to emphasize the fallacy in people claiming that christians and musslims worship different gods, its the same god and the same core is at the center of both religions.

#Islam #Musslim #christian #musslims #christians

@freemo