Difference and similarities between pyramid and prism.

What are the differences and similarities between the pyramid and the prism?

What is the difference between Proto-personas, Data-driven, Lean Persona and Ad hoc Personas?

So I am a little confused between these 4 types of characters that I have discovered in books and articles.

  1. Proto persona
  2. Ad hoc Persona
  3. Data-driven Persona
  4. Lean Persona

What are the differences between them?
And what is the process for creating each of them?

Thanks in advance,

opening – Time difference between automatic mode and other modes

I can only guess.

When you are in fully automatic mode, the camera will use the 3 parts of the exposure triangle to end up with a decent amount of depth of field, a shutter speed that is acceptable for taking photos by hand with the lens set and fill with more ISO.

When you switch to aperture mode, it allows you to manually choose the aperture and controls the shutter speed. BUT this can also allow you to set the ISO manually.

So if you are indoors and shoot it ISO auto, 1/25, f/4.0 and if ISO was at 25600, then the equivalent would be ISO 100, 10 seconds, f4.0.

The only thing that does not make sense is that the cam does not have such ISO capabilities. It only varies from 100 to 3200.

So, what I believe is that what is happening:
You are set to a low manual ISO like 100, which triggers a slow shutter speed. This triggers a reduction in noise which then retreats the image and this results in the long duration that you perceive.

Quote from the manual:

• Although noise reduction is enabled, it takes about twice the
time to take a picture.
• The access lamp for the card flashes and (busy) is displayed
on the viewfinder during noise reduction. You cannot take
more photos until the card access lamp goes out.

If the perceived "offset" is still 10 seconds, there is also an option to reduce the shock of the shutter. This adds a delay after tilting the mirror to avoid shock from the shutter when using longer exposures. The option is called anti-shock in the camera. Please also check that this option is disabled or 0 seconds.


ANTI-SHOCK You can select the interval between when the mirror is
lifted until the shutter is released from 1 to 30 seconds. This
decreases camera shake caused by vibration when the mirror moves.
This function can be useful in astrophotography and microscope
photography or other photographic situations where a very slow shutter
speed is used and camera vibrations should be minimized.
Notes • Anti-shock is added to the shooting functions individually
(single shot, serial shooting, self-timer shooting and
shooting with remote control). “Serial shooting” (P. 61)

ux field – UX vs Product Design, what's the difference?


There has been a general positive trend in the past 15 years designers are taking up more and more space responsibilities in the product development process

15 years ago, in the "Microsoft" era of formal software development, human-computer interaction, visual design or information architecture, specific disciplines in designand the products were delivered to specialists in these disciplines at formal stages of the development process.

Since then, the trend has been to move away from specializations and allow designers to influence and lead ever larger circles in the development process. This has resulted in wider diciplines like the UX design, as shown in the diagram below:

(Click to enlarge)
designer roles

Some drivers of this trend:

  • The promulgation of design thinking as a paradigm for end-to-end product development, not just the “design phase” work.
  • The incredible success of design-oriented companies like Apple, Dyson, Nest and others, which has shown the business community how successful development by design can be.
  • The flattening of the development process by executives such as Agile and Lean, which leads designers and other team members to work more transversely with wider areas of responsibility.
  • … etc.

Product design …

… is just another term, but it's also an almost predictable evolution / variation of the user experience. It represents the next broadening of the scope of design, from simple user experience design to an even broader design mandate for an entire product.

This may include some or all of the bubbles in the diagram above: a product designer can work not only on developing a user experience, but also on functional ergonomics, design technical, marketing approach, etc.

Keep in mind that these terms are fuzzy, but fuzziness does not mean that there is no meaning in the term. When understood in the context of the evolution of a term, it is easier to understand why it is used and what it is supposed to communicate and differentiate.

Companies will use the term "Product Designer" differently, but keep in mind that:

  • A certain blurring in the definition does not make a word unusable or useless (think how blurred the meaning of the word is F**k it really is, but it is still very useful =). The term "product designer" has value because it communicates a differentiated scope of design responsibility.

  • Even if a product designer does not have a broad scope of responsibilities for a particular business, it can still be beneficial for the business to use the term, because he can communicate a commitment or an aspiration design-oriented product development.

I hope this will help.

fuzzy linear advection equation by finite difference methods

I need to write an acode to solve the advection equation in a D, I need a unique parametric. how can i do this using finite difference methods such as upwind and leapfrog?

Difference between csrf and csrfkey

I came across these two parameters in the named Http header, csrf and csrfkey .. Can anyone define the difference between them?

What is the difference between object storage, block storage and cold storage in cloud computing

What is the difference between object storage, block storage and cold storage in cloud computing | Web Talk Hosting

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  1. What is the difference between object storage, block storage and cold storage in cloud computing

    Hi, Anyone know what is the main difference between object storage, block storage and cold storage in cloud computing? Are examples given? Thank you

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seo – Difference between GSC coverage and mobile usability

I have run Excel VLOOKUP on all GSC coverage list files, compared to all files that GSC indicates that mobile usability is mobile-friendly. About 30% of the pages listed in Coverage are not included in the mobile friendliness list. However, when I run them through the GSC URL inspection, it says that these missing pages are mobile-friendly.

Is this something that should worry me? Will this have an impact on the URLs visible by mobile searches?

methodology – What is the difference between the containment and aggregation relationship in UML?

As it says in ARLOW, J., AND NEUSTADT, I. UML 2 and the Unified Process, 2nd ed book, there are 7 types of relationships between different objects.

  1. Addiction

  2. Association

  3. Aggregation

  4. Composition

  5. Containment

  6. Generalization

  7. Realization

But I have read elsewhere that if a relationship has any of the following conditions, it must be a aggregation relationship:

a] Composition b] Containment c] Assembly

The problem is, I can't tell the difference between the aggregation relationship and containment as separate relationships!

algorithms – Median of the difference table

Given an array of $ A = (a_i) $ with $ n $ elements, find the median of the
table (fictitious) $ B = (b_ {ij}) $, or $ b_ {ij} = | a_i-a_j | $.

The obvious solution would be to use a deterministic algorithm for finding the median in linear time on the construction of table B, which would give us a complexity of $ O (n ^ 2) $. Is there a way (probably a divide and conquer approach and a linear median)? We could get a time complexity of $ O (n log n) $?

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