Daily Shaarli

All links of one day in a single page.

January 22, 2022

Loving Monday | Beckett Corp.

Loving Monday: Succeeding in Business without Selling Your Soul, is written by John D. Beckett, Chairman and C.E.O. of the R.W. Beckett Corporation. Beckett is the largest manufacturer of residential oil burners in North America. Affiliated companies are leaders in other home appliance components.

In Loving Monday, John Beckett provides a compelling account of how he has integrated his faith and work at Beckett. The result is a business that is respected throughout the heating industry for its integrity and ethics. Within the company, Beckett’s employees find a dynamic work environment where excellence is expected, and where each person is viewed with dignity and a high value on his or her individual worth.

Beckett’s book reveals life-lessons taught him by his father, the company’s founder. These lessons, coupled with insights gained from his decades-long walk of faith, give vivid evidence that high standards and business success can complement each other to the benefit of both. The book’s significance is summed up by industry leader, Archie W. Dunham, President and CEO of ConocoPhillips, Inc.: “Loving Monday is a quick read for busy business people. It portrays John Beckett’s journey of faith and his application of God’s values in the workplace.”

'Existential Threat of Our Time'? UK Bans Sunrooms That Trap 'Unwanted Solar Gain' – RedState

Beginning in June, all sunrooms included in new construction projects will be required to show they will not create “unwanted solar gain.” The change, noted Daily Mail, is part of “a raft of measures” aimed at “future-proofing” homes against summers where temperatures are predicted to reach 104º F. Though “well above what is currently experienced in Britain,” such highs would “cause conservatories to become unbearably hot, often increasing the temperature uncomfortably indoors too.”

Wait — so would 200 degrees, but so what?

Incidentally, the average daily temperature in the UK in July is 70 degrees. (More than half of the United States just laughed out loud and said “Hold my beer.”)

And not to nitpick, here — but whose business is it to determine whether a sunroom becomes “unbearably hot” or “uncomfortably warm” throughout a particular residential home, anyway — the homeowner or the British government?

ubuntu - Purpose of Debian "sites-available" and "sites-enabled" directories? - Server Fault
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More important than the mechanics of the system is the rationale...

Debian provides the two separate directories so that if you're automatically managing your Apache configs, you can just have all of the vhosts drop into sites-available on all your machines, and then individual vhosts can be enabled on the server that will actually serve them. It also means you can near-instantaneously disable a site if it's causing problems //

Important information:

You should edit files only in sites-available directory.

Do never edit files inside the sites-enabled directory, otherwise you can have problems if your editor runs out of memory or, for any reason, it receives a SIGHUP or SIGTERM. //

the file in sites-enabled is a symlink to the sites-available file: ///

after manipulating symlinks in sites-enabled, run sudo service [httpd | nginx ] restart

Use of the Janssen (Johnson & Johnson) COVID-19 Vaccine: Updated Interim Recommendations from the Advisory Committee on Immunization Practices — United States, December 2021 | MMWR

Cases of thrombosis with thrombocytopenia syndrome and Guillain-Barré syndrome have been reported after receipt of Janssen COVID-19 vaccine.

On December 16, 2021, after reviewing updated vaccine effectiveness and safety data, the Advisory Committee on Immunization Practices made a preferential recommendation for the use of mRNA COVID-19 vaccines over the Janssen adenoviral-vectored COVID-19 vaccine in all persons aged ≥18 years in the United States.

What are the implications for public health practice?

Pfizer-BioNTech or Moderna mRNA COVID-19 vaccines are preferred over the Janssen COVID-19 vaccine for primary and booster vaccination. The Janssen COVID-19 vaccine may be considered in some situations, including for persons with a contraindication to receipt of mRNA COVID-19 vaccines.

Successfully Locating Suction Line Leaks | Beckett Corp.

Many oil heat service technicians encounter problems with air in the oil supply system. Most are caused by the use of COMPRESSION FITTINGS, but leaks can be found elsewhere.

Venting Multiple Appliances Into A Common Chimney Or Flue | Beckett Corp.

Connecting more than one oil heating appliance to a common chimney can be easy and beneficial once we understand the basic guidelines. When following the guidelines for installation, the system will work for you. Disregard these guidelines, and the system can work against you.

The flue and chimney sizing not only controls the exhaust of combustion by-products, but also has a direct effect on the burner’s air supply. When the draft of the appliance rises, the fan wheel of the burner moves air easier. As the draft on the appliance drops, the fan wheel must work harder to move the same amount of air. Proper chimney and flue design, along with proper draft control, allow for an efficient combustion process. //

  1. The chimney must be of adequate size to properly vent the gases created by the total BTU input of all appliances combined. Refer to Figure 1.
  2. The flue piping of the system, whether for single or multiple appliances, should be as short a run as possible, and rise 1/4″ per running foot up and toward the chimney. Whenever possible, do not exceed 10 feet of flue pipe length.
  3. Avoid using more than two 90-degree turns in the piping. Additional 90-degree turns further restrict the exhaust system on burner start-up.
  4. The piping, when inserted into the chimney entrance, should not extend beyond the inside surface of the chimney liner. The area around the flue piping should be sealed where it enters the chimney.
  5. When venting two appliances separately into a common chimney, always install the smaller flue pipe (appliance with lowest GPH input) at a higher point into the chimney than the larger flue pipe for the appliance with the largest GPH input. Refer to Figure 2.
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civil engineering - What is the lowest point below sealevel that we have built where a human can go? - Engineering Stack Exchange

According to google searches, the Jinping Underground Laboratories are the "deepest" building or buildings constructed, reaching 7900 feet (2400 metre) below the surface.... However, the surface in question is a mountain. While that does classify as underground, it highlights a flaw in the question of the deepest underground building.

I can't seem to find the lowest building in the world though, or the deepest in relation to depth within the earth's crust.

What is the lowest point below sea level that we have built where a human can go? I imagine this is likely another laboratory. But where would a building of this description be?

Airline CEOs make U-turn, now say 5G isn’t a big problem for altimeters | Ars Technica

All barking up the wrong tree.

The FAA should have evaluated some actual altimeters before the FCC approved the use of C-Band for 5G and fed into that process.

This, coupled with the 737Max debacle - means heads really have to roll at the FAA. Problems with both attitude and competence.

Prior would have been challenging. The FAA was unusure how much spectrum to allocate to 5G. The band in question is 3.7 to 4.2 GHz. Prior to 2020 it was ALL used for fixed sattelite service (FSS). The FCC had a long negotiated process to determine how much or little or that would be reorganized to be used for mobile services (5G) and how much would remain as FSS. That dividing line would determine how far the new 5G c-band would be from the radio altimeter band. The FCC looked at reallocating as little as 100 MHz and as much as all 500 MHz to mobile services (although that was very unlikely). Boeing and the avionic companies simply said don't reallocate more than 400 MHz (5G would end at 4.1 GHz). The FCC reallocated even less. 300 MHz and then stripped off 20 MHz for a guard band so it ended at 3.98 GHz.

So while the FAA maybe could have done some preliminary testing of a few possible scenarios they didn't know the realignment plan until the FCC completed it. Still that happened in 2020 almost two years ago. At that point the FAA should have known that baring credible actual evidence of interference the auction and rollout would eventually happen. They could have mandated testing then or a year later when the auction was completed.

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Standardizing Electrode Settings | Beckett Corp.

For many years our electrode settings have remained unchanged. However, in recent years we found that an alternate electrode setting worked well in certain applications. This change amounted to lowering the electrode tips downward from the old standard 7/16” to 5/16” above the nozzle centerline.

We have seen an improvement in light-offs with the 5/16” settings, especially on installations that are susceptible to cold oil or high oil viscosity. The 5/16” setting places the high voltage arc where it can more effectively ignite the larger droplets produced by colder or higher viscosity fuel oils.

In an effort to improve performance and better serve the market we have decided to standardize the electrode settings for our “F” head applications by eliminating the old 7/16” above centerline standard electrode setting and using the 5/16” above centerline setting as the standard setting. The electrode position of 1/16” in front of the nozzle and the 5/32” gap between the electrode tips will remain unchanged.

The following diagram will show you the 5/16” standard specifications:

Troubleshooting The CAD Cell | Beckett Corp.

The cadmium sulfide cell, or cad cell, is part of the primary control system and is used to sense the presence of the oil burner flame. The cad cell assembly consists of the actual cell, a holder, and cord to connect the cell to the primary control. This detector is mounted in the air tube of the burner in such a way as to sight the flame.

The cad cell is made from a cadmium sulfide coated ceramic disk with a conductive grid over its surface. Electrodes are attached to this surface, and the cell is sealed in glass to protect it. The cad cell in darkness has a very high resistance to the flow of electrical current. Yet, in the presence of visible light, it has a very low resistance. For a properly adjusted burner, during operation, the cad cell resistance should be approximately 300-1000 ohms, but not more than 1600 ohms. A resistance above 1600 ohms signals a problem that should be corrected.

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Nginx enable site command - Server Fault

We all know how to enable a website using apache on Linux. I'm pretty sure that we all agree on using the a2ensite command.

Unfortunately, there is no default equivalent command that comes with Nginx, but it did happen that I installed some package on ubuntu that allowed me to enable/disable sites and list them.

The problem is I don't remember the name of this package.

Does anybody know what I'm talking about?

Please tell me the name of this package and the command name.

Study: Leidenfrost effect occurs in all three water phases: Solid, liquid, and vapor | Ars Technica

But there's a much higher threshold of 550° C for levitation of an ice disk to occur.

Dash a few drops of water onto a very hot, sizzling skillet and they'll levitate, sliding around the pan with wild abandon. Physicists at Virginia Tech have discovered that this can also be achieved by placing a thin, flat disk of ice on a heated aluminum surface, according to a new paper published in the journal Physical Review Fluids. The catch: there's a much higher critical temperature that must be achieved before the ice disk will levitate.

As we've reported previously, in 1756, a German scientist named Johann Gottlob Leidenfrost reported his observation of the unusual phenomenon. Normally, he noted, water splashed onto a very hot pan sizzles and evaporates very quickly. But if the pan's temperature is well above water's boiling point, "gleaming drops resembling quicksilver" will form and will skitter across the surface. It's called the "Leidenfrost effect" in his honor.

Airline CEOs make U-turn, now say 5G isn’t a big problem for altimeters | Ars Technica

After stalling for almost two years, FAA cleared 78% of planes in the past week. //

These statements marked a sudden shift, coming just three days after Parker and Kirby signed a letter claiming that 5G on the C-band would cause "catastrophic disruption" to air travel. //

The biggest recent development is that the FAA finally started a process to evaluate and approve altimeters after claiming without proof that 5G on C-Band spectrum (3.7 to 3.98 GHz) would disrupt altimeters that use spectrum from 4.2 GHz to 4.4 GHz. While the Federal Communications Commission created a 220 MHz guard band to protect airplane equipment, poorly built altimeters may be unable to filter out transmissions from other spectrum bands.

The FAA didn't start its process of evaluating the actual altimeters used by airplanes after February 2020, when the Federal Communications Commission approved the use of C-Band spectrum for 5G. The FAA also didn't start this evaluation process after the FCC auctioned off the spectrum to wireless carriers in February 2021. Instead, the FAA continued arguing that 5G deployment should be blocked long after carriers started preparing their equipment and towers to use the C-band. //

The FAA saying that deployment at these frequencies might cause problems doesn't make any sense at all because its already been done. Is the US some special case where laws of physics don't apply?

As someone joked in another post, metric vs imperial wavelengths? //

The FAA could have been in CYA mode even three months ago and had 99.9% of aircraft cleared prior to the Jan 17th go live date. They didn't even start to do their job until Jan 4th. I would point out the original go live date was 1 Nov so the FAA got a homework extension twice and still didn't turn it in on time. //

The FAA came up with a testing regime this year and now we've got most altimeters in use having been cleared, just 3 weeks later. The resources it and the airline industry spent fighting 5G C-band deployment seem quite clearly to far exceed the resources it spent on testing and discovering there's actually no problem. //

I can't help but think that some airline CEOs tinfoil hat wearing, 5G conspiracist brother-in-law got a hold of them at a holiday get together to let him know of the imminent air disaster due to the 5G transmitters and now caused this ridiculousness for the past several weeks.