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.

Computer science: networking: what is a virtual connection?

In tutoring, definitions are always important. The tutor shares the definition of virtual connection.

virtual connection:

A virtual connection is a software-initiated connection between two nodes in a network. (See yesterday’s post for the definition of a node.)

When you visit a site on the internet from your browser, you establish a virtual connection with that server.

Source:

www.pcmag.com

www.w3schools.com

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

Computer science, networks: what is a node?

Understanding computer networking leads to self-tutoring: the tutor defines node in computer networks.

node (noun):

an endpoint, or else a directing or processing device between endpoints. The endpoint could be a PC, printer, scanner, server, etc: at an endpoint, content either enters the network or is received there.

The directing device could be a router.

There are different points of view about nodes depending on the type of network, etc. However, one point of view imagines a node as a point where information enters, is received, or is processed in some way to make it available to its end user. A router, for instance, directs information to its various specific requesters.

Source:

audiopedia

www.lifewire.com

www.lifewire.com

whatismyipaddress.com/router

www.howtogeek.com

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

Philosophy, business: the “single source of truth” concept

In the tutoring realm, awareness of new insights and definitions is important. The tutor mentions single source of truth.

In my March 5 post I mention the idea of a data silo. Put simply, it’s knowledge kept secret by some members of an organization, even though they’re meant to be cooperating with the others.

Single Source of Truth
The single source of truth model conceives one source of information to which everyone has access and everyone trusts as “best”. It eliminates the possibility of data silos – why would you use your own private information when the others have access to better?

In business, many believe that the reason one enterprise is more successful than the next is that its internal cooperation is superior. Hence, the single source of truth paradigm appeals to many business leaders.

Source:

www.businessinsider.com

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

Lifestyle: baking: successful substitution of bourbon for vanilla extract in a recipe

More lifestyle self-tutoring: the tutor confirms the idea of yesterday’s post.

In yesterday’s post I brought up the idea that bourbon can perhaps be used as a substitute for vanilla extract in some baking recipes.

Last night, I made rice pudding with the substitution of bourbon for vanilla. The recipe called for two tsp vanilla extract; I used four tsp bourbon instead.

Perhaps surprisingly, the rice pudding seems to have a lighter taste. However, I wouldn’t notice the difference if I didn’t know I’d made the switch.

Cheers.

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

Baking: bourbon: a possible substitute for vanilla extract?

For me, baking leads to constant self-tutoring. The tutor shares a discovery.

I’ve read, in two places now, that in a typical baking recipe, bourbon can possibly be used instead of vanilla.

As I understand, the substitution is recommended when you don’t have enough vanilla for the recipe. It’s most effective in a recipe that doesn’t call for much vanilla, but rather, just a teaspoon or less. To make the substitution, the idea is to use at least as much bourbon, but up to twice the amount, of vanilla called for.

Interesting, eh?

Source:

cooking.stackexchange.com

www.simplemost.com

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

Computer science: value parameter vs variable parameter

Tutoring computer science, the difference between variable and value parameters is interesting. The tutor illustrates it.

value parameter:

the parameter’s value is sent to the function or method, but the function can’t change the parameter itself. For instance:

j=5

function(value_parameter p){

p=p+1;

output “p=” p;
output “j=” j;
}

function(j);

will give the output

p=6
j=5 //j is still 5

variable parameter

the parameter itself is sent to the function. Changes made to it by the function will persist in the external program.

j=5

function(variable_parameter p){

p=p+1;

output “p=” p;
output “j=” j;
}

function(j);

will give the output

p=6
j=6 //j has been changed to 6 by the function

Source:

docwiki.appmethod.com

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

English: what does lassitude mean?

Tutoring English, new vocabulary is always interesting. The tutor brings up the word lassitude.

lassitude (noun):
lack of energy; weariness; fatigue; depletion.

After the last performance of the week, the cast always displays lassitude.

Source:

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

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