equipment identification – What mount system is this Hanimex zoom lens?

This lens was manufactured in the Canon FD (and new FD), Nikon F, Minolta M/MD, Pentax K, Fujika FX, CONTAX/Yashica (C/Y or Y/C), Konica AR, Olympus OM, and M42 mounts. Your lens is not any of those.

It is not the Sigma SA, Contaflex, Exacta , Praktica PB, Praktina, Icarex, Ricoh XR, Leica M, or Leica R mount.

It appears to have been modified at some point to be compatible with a changeable mount system like the Tamron Adaptall or T4-TX system. But it isn’t either one of those systems, either.

The Arri PL mount for cinema cameras looks similar, but isn’t a match.

Perhaps it has a missing part?¹

Perhaps, but there are no obvious attachment points for anything behind it other than the three locking tabs and the single pin tab. No open screw holes and no threads on the protruding rear lens group. I think it has been modified to fit in an obscure 8mm or 16mm movie camera.

¹ From a comment by @Rafael

filesystems – Is it possible to wear-level a FAT32 file system?

Because SD cards use flash memory, they should requires wear leveling to avoid significantly shortening the life of the card. At the same time, my understanding is that they usually use a FAT32 file system.

My understanding of FAT32 is that there is a small “file system description” block at the beginning of the device, which is followed by the file allocation table (FAT) describing which files are stored where. However, because the FAT needs to be updated every time a file is moved/copied/appended/etc, then doesn’t that mean the FAT gets written to many times more often than the rest of the card?

For example, if each erasable block of an SD card is 4 KB, and it uses a 32-bit address space, they each erasable block of the FAT contains 128 addresses, so the FAT should get erased and written ~128 times as often as the rest of the device. If this hypothetical device has an expected life span of >100k cycles, then should it not wear out around 1k cycles if it spends the entire time formatted with a FAT32 file system?

And, if my current understanding is true, then wouldn’t FAT32 be basically the worst possible way to format a flash memory device? Or is this a problem that all file systems have, so FAT32 isn’t apreciably worse than anything else?

worksheet function – Excel Formula for Scoring System

I’m trying to build a scoring system for a data set of several variables for customers (ie revenue, market share, industry sales, etc). Some variables are in currency (revenue) and others are percentages (market share). Trying to convert all the variables of each client to a score of 1 trough 5 (using decimals due to hundreds of clients). I’d like to compare all customers amongst each other based on a weighted average from the scoring system. I’ve tried Z score and ranking but not exactly successful. Thanks for your help!

software engineering – How to design a character damage system with ECS architecture?

I am developing an game with ECS architecture and trying to design a character damage system.

Does the following design fits into ECS conception and will it be extendable in future?

  • I have an Actor component with health percent attribute and ActorsDamage system.

  • I also have an inventory system, so actors can use some food to increase their health.

  • When actors use inventory items, their Lua handlers executes and generates ActorHit event.

  • ActorDamage system receives this event and increases or decreases the actor’s health.

  • Other game systems link actors’ AI system or actors’ keyboard control systems can also trigger hit events.

So, is this an appropriate design conception, or is there something I need to correct or improve?

lightroom – Family Photos System

I’m sure folks here have a good approach to photo storage/processing and backup. I’m a dad with 4 kids and lots of family photos. I had my first digital camera in 1996 and have pictures stretching back over a number of years. Over time, I used apple photos, Flickr, Google Photos, Lightroom and Dropbox.

I spent a lot of time over the last week pulling all my photos into one folder and removing duplicates. I’m down to about 200GB of photos. I have an Adobe CC subscription and also pay for Google One and Dropbox business. I like the hybrid of local storage with cloud as Backup and Sync.

I’m thinking about this system going forward:

Family System

So I would connect my phone/camera to any computer and get the photos into Dropbox. Occasionally, I would organize, edit them in lightroom. Dropbox would back them up and I would also use Google Cloud sync to have them in Google Photos, which is good for integration (i.e. show the pics using Rasp Pi via Dakboard) and also lets us pull up photos on phones, etc.

Is this a good/bad idea? Would love to hear about any better systems.

[Request] [UW] Forum Comments System

I’m looking for forum comments system by xffutureuser ((UW) Forum Comments System). I believe there is only one version but if there are multiple versions, any version will suffice as long as it works with XenForo 2.2

.(tagsToTranslate)xenforo(t)xenforo themes(t)xenforo nulled(t)xenforo free(t)xenforo 2.2(t)nulled(t)nulled script(t)whmcs(t)whmcs nulled(t)scripts(t)nulled scripts(t)vbulletin(t)vbulletin nulled(t)vbulletin 5 nulled(t)xenforo resources(t)wordpress download(t)wordpress nulled forum

Finding initial conditions for DAE system of equations

I have the following DAE system of equations

(Rho)0 = 1;
M = 1;
eq1 = D(m(t, r), r) - 4 Pi (Rho)(t, r) R(t, r)^2 D(R(t, r), r);
eq2 = D(m(t, r), t) + (4 Pi)/3 (Rho)(t, r) R(t, r)^2 D(R(t, r), t);
eq3 = D(R(t, r), r, t) - D(R(t, r), t) D((Nu)(t, r), r) - 
   D(R(t, r), r) D((Lambda)(t, r), t);
eq4 = D((Rho)(t, r), r) + 1/4 (Rho)(t, r) D((Nu)(t, r), r);
eq5 = Exp(-2 (Nu)(t, r)) (D(R(t, r), {t, 2}) - 
      D((Nu)(t, r), t) D(R(t, r), t)) - 
   Exp(-2 (Lambda)(t, r)) D((Nu)(t, r), r) D(R(t, r), r) + m(t, r)/
   R(t, r)^2 + (4 Pi)/3 (Rho)(t, r) R(t, r);

I have some problem finding initial conditions that produce solutions: how can I vary the initial conditions to see when the system has solutions? Currently I am just trying different random values, but it is obviously not the best method. I use NDSolveValue as follows:

NDSolveValue({eq1 == 0, eq2 == 0, eq3 == 0, eq4 == 0, 
  eq5 == 0, (Rho)(0, r) == (Rho)0, (Rho)(t, 0) == (Rho)0, 
  m(0, r) == M, 
  m(t, 0) == 
   M, (Nu)(0, r) == -(1/4) Log((Rho)0), (Nu)(t, 
    0) == -(1/4) Log((Rho)0), (Lambda)(0, r) == 
   0, (Lambda)(t, 0) == 0, R(0, r) == ((3 M)/(4 Pi (Rho)0))^(1/3), 
  R(t, 0) == ((3 M)/(4 Pi (Rho)0))^(1/3), 
  Derivative(1, 0)(R)(0, r) == 1}, {(Rho), R, 
  m, (Nu), (Lambda)}, {t, 0, 1}, {r, 0, 1})

3d – Goal system unity

It’s not unusual in Unity to have an invisible “Manager” game object in the scene which holds any such scripts which can not be considered a behavior of any particular gameObject appearing in the game. This allows such manager-scripts to use Unity events like Update.

But when your manager doesn’t need any Unity events and you don’t need the luxury of being able to see and change its values in the Unity inspector, then you can also implement it as a plain old C# class not inheriting from MonoBehaviour. But because Unity does not have a “main” method as a central entry point into the application (at least not one you can see), you need to instantiate these classes from other MonoBehaviours and store their instances somewhere (within MonoBehaviours or in static variables).

How does the Central London transport system work?

What ticket do I need to travel in the centre all day? Is there a top-up card I can use?

If you are just traveling for one day you have a few main options.

  1. Buy a paper travelcard for the zones you want to travel in.
  2. Buy an Oyster card, top it up with pay as you go credit and take advantage of the daily cap.
  3. Use your contactless credit/debit card for pay as you go.
  4. If arriving in London by train buy a train ticket that includes a travelcard.

The Oyster card is probably only a good option if you plan to come back and you should be aware of bank charges if you use contactless with a foreign card. Paper travel card is the simplest but nowadays is more expensive than Oyster/contactless capping.

I am wondering how the Central London transport system in London’s works.

The system is fiendishly complex and getting ever more so. This post tries to cover the basics but it’s impossible to cover everything in the space of a Stack Exchange answer. Fortunately most of the complex corner cases aren’t really a huge concern for the occasional visitor.

The first question is whether your service is included in the system. For services that run on rails (Train, Tube, DLR and Tram) that question is mostly answered by the “London rail and tube services” map, but note that the mappers sometimes jump the gun. For example at the time of first posting this answer Heathrow Express did not take Oyster/contactless.

London buses are also part of the system, but I’m not sure how far you can travel from London before the buses stop being London buses.

The area covered is mostly split into Zones, but there are a few areas which are outside the Zones where special fares apply.

Oyster is a smart card issued by TFL. Cards can be obtained from a wide variety of locations including rail and tube stations. Currently, there is a £5 charge for the card which is refunded in the form of pay as you go credit one year after the card is purchased. They can hold both Pay As You Go credit and some types of travelcards. It is also possible for certain discounts to be registered on an Oyster card though this is unlikely to be relevant to visitors. Oyster cards can be registered for online journey history, top-ups, etc. but they don’t have to be.

There also exist “visitor” Oyster cards. These are only available outside London, they have a non-refundable £3 charge, and they entitle the holder to discounts on a handful of tourist attractions. Otherwise they are basically the same as a normal Oyster card.

Pay as you go charges for each individual journey. You can pay either by using pay as you go credit on an Oyster card or by using a con tactless credit or debit card. The fares depend on what zones you travel to/from, what modes of transport you use, and whether your travel is at peak or off-peak.

On trains, tube and DLR you must touch in and touch out at the yellow Oyster readers (which may or may not be integrated into barriers) at the start and end of your journey, but not normally when changing from one train/tube/dlr service to another. In some cases to get the lowest fare when taking unusual routes you must touch “pink” Oyster readers at your change locations.

Touching in without touching out or vice-versa will lead to an incomplete journey fare being charged which is expensive and does not count towards caps.

On buses and trams on the other hand you only have to touch in for each bus/tram, on the busses you touch in on the bus, on the trams you touch in on the platform before bording there is normally no touching out. Wimbledon is a special case as the tram platform is behind the train/tube gatelines.

Most fares are subject to daily caps which depend on where you have travelled. If you pay by contactless there are also Monday to Sunday caps which apply to an entire week of travel measured from Monday to Sunday. Generally the daily caps are cheaper than a paper day travelcard while the Monday to Sunday caps are the same price as a weekly travelcard.

If you use contactless your travel will be billed daily, keep this in mind if you use a foreign contactless card with a per-transaction fee.

Travelcards are available for various zone contributions, daily, weekly, monthly and annually. Daily travelcards are issued in paper form, longer term travelcards must be loaded onto an Oyster card.

Travelcards and capping do not apply to “Emirates Air Line” (A cable car service in the docklands), “Southeastern High Speed” or “Heathrow Express”.

Buses are the cheapest way to get around London. The single fares are lower than other forms of transport and there is the bus hopper fare which in some cases lets you make two journeys for the price of one. All travelcards regardless of zone are valid on all London buses and similarly when determining caps a bus journey does not add any zones to your list for capping purposes.

Paper single tickets are available for tube services, but they are considerably more expensive than Oyster fares.

Rail services will offer regular rail tickets like other services in the UK. There also exist some combination rail tickets offering rail journeys in combination with either an individual tube journey or a day travelcard for the tube.

There are no paper single tickets for London buses, though paper travelcards are valid.

I’m not sure what the paper tickets situation is with DLR and trams.