English: what does derring-do mean?

Tutoring English, new vocabulary is always interesting. The tutor mentions derring-do.

derring-do (noun):

boldness; decisive bravery.

Jumping the mud puddle in his white suit was an act of derring-do.

Source:

Gilmour, Lorna (editor). Collins Essential Canadian English Dictionary and Thesaurus. Glasgow: HarperCollins, 2006.

w3schools.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology, nursing: what is blood serum, vs blood plasma?

Tutoring biology, you might be asked about blood serum and/or blood plasma. The tutor mentions a distinction.

In yesterday’s post I give an explanation of blood plasma: it’s blood minus the red blood cells, white blood cells, and platelets. Some people might see it as the liquid that carries the blood cells and platelets.

Blood serum is related, but has a specific difference from plasma:

blood serum:

plasma after fibrinogen has been removed from it.

Fibrinogen is a protein that weaves the physical blood clot.

Source:

Mader, Sylvia S. Inquiry into Life, 9th ed. Toronto: McGraw-Hill, 2000.

www.w3schools.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Biology, nursing: what is blood plasma?

Tutoring biology, you might be asked about blood plasma. The tutor mentions its defintion.

blood plasma:

the liquid that holds the red blood cells, white blood cells, and platelets. The plasma consists of water and substances suspended or dissolved therein: proteins, salts, etc.

Plasma does not include blood cells or platelets.

Source:

Mader, Sylvia S. Inquiry into Life, 9th ed. Toronto: McGraw-Hill, 2000.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

English: the word mien

Tutoring English, new words are always interesting. The tutor mentions mien.

mien (noun):

non-verbal behaviour, or even appearance, not necessarily intentional, that suggests a person’s mood, personality, or even background.

During recitals, the pianist’s mien indicated she loved performing.

Source:

Mish, Frederick C (editor). The Merriam-Webster Dictionary. Springfield: Merriam-Webster, 2004.

www.w3schools.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Web design: the <blink> effect

Tutoring web design, you might be asked about legacy issues. The tutor brings up the blink effect.

Today I tried using the <blink> tag in both Chrome and Edge; for me, it worked in neither.

I don’t believe I ever used the blink effect in a published page, but I still wonder why it’s deprecated. If people didn’t like it, then surely they could have simply avoided using it?

Nowadays, blink is achieved by animation. It’s a rare case when accomplishing a specific effect has become more involved, rather than easier, as time has passed.

Source:

www.w3schools.com

www.htmldog.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Networking, OSI model: Layer 2 vs Layer 3

Reading about networks leads to self-tutoring: the tutor mentions some ideas about Layer 2 vs Layer 3 in computer networks.

As I understand, Layer 2, aka the link layer, is associated with data transmission in the context of frames. A simplified point of view about it imagines physically connected devices communicating. In broadcast mode, every member forwards all its output to every other member. However, output can be sent to only a specific member. Connected members have no nodes between them; each member is directly connected to any other. The Layer 2 network is self-contained.

Layer 3 uses packets, rather than frames, to organize data. It’s populated by routers. In Layer 3, a given data packet has one intended recipient; the others on the network will not see it. The router conducts each packet to its appropriate destination. Layer 3 is needed when there are intervening nodes between ones that want to communicate – hence, the need for routing the packets of information to their specific destinations. Layer 3 is the context for communication to happen between different networks.

Source:

www.wideband.net.au

stackoverflow.com

www.networkworld.com

networkengineering.stackexchange.com

askleo.com

www.computerworld.com

documentation.meraki.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

English: what does munificent mean?

Tutoring English, new words are always interesting. The tutor shares the meaning of munificent.

munificent (adj):
abundantly generous.

A religious person might point out that God’s offering of Jesus as sacrifice for payment of human sin is munificent, as is Jesus’s offering of self towards the same purpose.

Happy Easter:)

Source:

Barber, Katherine et al. Oxford Canadian Dictionary of Current English. Don Mills: Oxford University Press, 2005.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Video games, graphics: what is ambient occlusion?

More self-tutoring about modern terms: the tutor shares what he learned about ambient occlusion.

ambient occlusion

a way of depicting a scene that shows features darker or lighter based on their exposure to ambient light, rather than a directed light source.

In many settings, such as within a dungeon or room in a deserted building, we often don’t imagine a light source. Therefore, the ambient lighting model makes sense.

Example: With ambient occlusion, a surface that crosses line of sight will be lighter than one running parallel to line of sight.

Source: Techquickie, on youTube

www.w3schools.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Music, history: the 85-key piano

Seeing an antique can trigger self-tutoring: the tutor shares a find.

A few days back my son, visiting a historic site, was invited to play the piano. After awhile he pointed out that it starts – and ends – with an A key.

The pianos that I’ve seen, as both my sons pointed out, start with a bass A but end with a treble C. Our piano at home is like so. Such pianos have 88 keys.

The antique one that starts with a bass A, but ends with a treble A as well, three keys earlier than I’ve ever seen – is it common? Well, common enough, especially among pianos from the 1800s, apparently.

Source:

livingpianos.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Botany: trees in Victoria: live oak

Tree idenitification leads to self-tutoring: the tutor describes a find in Victoria.

Victoria’s assortment of trees is amazing. Last fall I mentioned seeing a gingko biloba as well as an amur corktree there.

I’ve read a few times that there is a live oak on Dallas Road, near the breakwater. Yesterday I decided to drive by to check.

Indeed, there is one, I’d say: it’s across Dallas Road from the breakwater, a bit closer to downtown. It’s really noticeable right now, being the only tree around with leaves.

The tree leans out to the road. I left the car and walked by it, then back, not really stopping. The house owner (my assumption) was sitting in the yard, so I didn’t want to intrude by stopping and staring at the tree. He gave me a friendly nod; I think he knew I was examining the tree. I think people commonly do.

Thanks, Vic!

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.