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Dansercoer

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Posts posted by Dansercoer


  1. Most in house design teams will be involved in doing this as they need to tailor their designs to what is achievable for the company.

    What I'm after is companies that approach the design of business (processes) in a creative way, not so much the product or service in itself. This is not to be mistaken with service design, which is only one part of the value chain. But yes, IDEO is a good example.

     

    Why am I asking? I'm currently doing an MA in Creative and Cultural Entrepreneurship (design pathway) after having studied and worked in product design. I'm now looking for internship opportunities.


  2. Sorry to dig up this old topic.

    My spec list in order of importance:

    - good tech support (http://www.laptopmag.com/mobile-life/tech-...009.aspx?page=1)

    - 15” antiglare screen with decent resolution

    - Intel Core i7

    - min 4GB DDR3-1066 RAM

    - Windows 7 64-bit

    - reasonable price

    - good graphics card

     

    A ThinkPad T510 with 3 years of carry-in warranty could have most of the above but would cost £1440.62 and has Intel HD Graphics. Any better alternatives?

     

    If tech support was my only spec I would go for a MacBook Pro;

    Only after 6 times / 2 months of unsuccessfully trying to repair my current ThinkPad’s screen, Lenovo sent me a replacement machine.


  3. So I'm looking for two ø8mm cords with a similar-looking black braid (=easy to clean stains and dirt, little friction against steel and legs) and respectively an elastic (40m) and non-elastic core (155m).

    I did contact most rope yards in Belgium and neighbouring countries, there's one British company left to send me samples, but I have a bad foreboding...

     

    Does anybody know a "super" cord store that ships to Belgium?

    I already tried Rope Inc.

     

    Thanks in advance!


  4. Thanks a lot for your reply!

     

    I find it weird that people would have to pay to comply with the law though. (A technical regulation provides technical requirements, either directly or by referring to or incorporating the content of a standard, technical specification or code of practice.)

    Also, wouldn't this be unaffordable for designers making limited edition lighting for example?

     

    Manufacturers and exporters need to know what the latest standards are in their prospective markets. To help ensure that this information is made available conveniently, all WTO member governments are required to establish national enquiry points and to keep each other informed through the WTO — around 900 new or changed regulations are notified each year.

  5. De Montfort University: Design Entrepreneurship

    Goldsmiths: Creative and Cultural Entrepreneurship

    London College of Communication: Enterprise Management for the Creative Arts

    Manchester Metropolitan University: Enterprise in Art and Design

    University for the Creative Arts: Creative Enterprise

     

    I still have to visit the schools and ask students and tutors for a list of subjects, examples of business plans, etc. but the list is long so maybe someone here can already give me some information?

     

    A good course for me:

    - alters perceptions of how business and creativity work together, in an open-minded way

    - has a business plan as a result

    - is part of a qualitative creative department

     

    I've heard good things about Goldsmiths, I don't know about the course though as it is the first year they organize it.


  6. Dear all,

     

    I was wondering whether there's a method to make sure the list of obligatory (safety) codes to be met is complete when starting a project? Isn't there an (international) umbrella organization/website that gathers most codes, so chances of not knowing and thus omitting codes are limited?

     

    Also, is this usually the task of a designer (in-house vs. freelance vs. design-entrepreneur), a subcontracted solicitor, an engineer, etc. ?

     

    I just don't want legal problems...

     

    Thanks in advance!


  7. To turn it you need to move the centre of gravity to the inside and for the resulting force to act off centre (4 years of mechanical engineering degree).

    May I ask what you meant with "move the centre of gravity to the inside and for the resulting force to act off centre" ?

     

     

    I found three options for point 1:

    http://webphysics.davidson.edu/faculty/dmb...on/rolling.html

    -> Because the wheel is not rolling yet the rolling resistance should be orientated in the opposite direction acting from the bottom of the wheel in order not to contribute to the rotation of the wheel.

    But down the bottom of the page there's "distribution of the normal forces creates a net torque negating the rotational contribution of the friction" ?

     

    http://cnx.org/content/m14385/latest/

    -> Here the formulas are completely different (no rolling resistance coefficient) and there's no deformation.

     

    The rolling resistance force is (mw + mp)*g. I made the rolling resistance a vertically upward force acting at a horizontal distance b (= rolling resistance coefficient in units of length) in front of the wheel centre ground contact point, which creates a clockwise rolling resistance moment (mw + mp)*g*b. If you compute a horizontal force couple at the wheel centre and ground necessary to overcome this rolling resistance moment, then the force is F = [(mw + mp)*g*b]/r, pointing forward at the wheel centre, and backward at the ground.

    I tend to go for the last option because there's no contradiction, but I would like a confirmation to be sure. Finding the rolling resistance coefficient is another issue.


  8. Is it possible that MotionStudy is a new thing?

    Maybe it's time for me to look for a new version, I couldn't open your assembly either. ;)

     

    So if I understand well;

    Question one is a combination of gravity and rolling resistance so that's for CosmosWorks? (http://www.productdesignforums.com/index.php?showtopic=10504)

    Question two can be done through MotionStudy?

    Question three directly follows the above to take the angular momentum into account?

    And what about materials strength?

     

    Sorry if these questions sound stupid, it's just that I've never done this before...


  9. The wheel is able to change direction because it behaves like a chopped cone, not like a bicycle where you have to force a wheel to change direction. This same bicycle analogy proves that it won't sink that much into the ground; the wheel is heavier and the rings are thinner, but the contact surface is bigger because of the diameter and the fact that most of the time there is more than one ring touching the ground. Of course the tracks are deeper than footprints, but I have the impression that they are not as harmful to the lawn as a shortcut worn away by pedestrians, just think about lawn aerators. Small rocks shouldn't be a problem either, the diameter and width of the wheel are too big to feel much of an impact, large rocks can be seen.

    I got some good advice though:

    I'll keep the perforations in the metal mesh smaller than the smallest finger without making it non-transparent. I could flare the outer rims when the resting surface needs to be a few centimetres wider to achieve balance, I'm just a bit concerned about the price tag and the loss of support for the mesh.

     

    I'll put the project aside for a little while to think about the worst case scenario, maybe I'm getting too attached to it as well. :D

    You're right, there might be a storm (putting the wheel on its side helps), the angular momentum makes that the braking distance is relatively long and people could deliberately tip over the wheel.


  10. I like your two examples.

    But to answer your questions;

     

    Why an alternative to walking paths?

    Apart from the two reasons I already mentioned it will also keep your shoes clean without having to pave green space.

    I am sure we have all heard of physics groups and classes in school building trebuchets or catapults. They are planning on storming a castle about as much as we are planning on giving extra large hamsters exercise.

    By you positioning to one side or the other to tilt it?

    Yes.

     

    How do you control speed?

    When your speed is slower/faster than the wheel's speed then you will be walking in the rear/front half which slows down/accelerates the wheel. The questions above are there to make this as easy as possible, I'm curious to hear your answers.

     

    How do you avoid other people?

    As described above. This wheel is not intended for hilly parks with high vegetation that limits sight.


  11. Yes, when calculating the maximum weight I’ll have to choose the most extreme out of both situations: stopping on a downwards slope or starting on an upwards slope. But it seems that they are equally difficult as the absolute values of both accelerations are equal.

    It is for this calculation that I’ve drawn the person in such an extreme position (he could even be a bit taller), the size should be fine for normal walking.


  12. Thanks a lot for the extensive reply!

     

    Some further clarification;

    The ribs seem rounded, but that's only an optical illusion.

    The intention of the wheel is to give an alternative to the walking paths in parks, a new experience with more freedom. Parks are not perfectly flat, this means that safety margins will need to be built in.

     

    My reasoning:

    For the first question I compared the wheel to a seesaw with rolling ;) resistance rather than a pivot; it can roll even when the person is just standing. I couldn't find the horizontal force component, maybe you can?

    For the third question I didn't involve centripetal force because even when the wheel is not moving forward it shouldn't fall. But I did take it into account for the walking surface, a bit like indoor running/cycling tracks. Maybe the slope is a bit exaggerated, but wouldn't a spherical walking surface increase the cost? I will use anti-slip paint though. (http://www.protectakote.co.uk/)

     

    Rounding the cross-section would make the turning smoother and add strength, but it would destroy more lawn, it would make it harder to counter the inertia and I have the impression that the speed won't be high enough to get proper control over the wheel. Strength could always be improved by using thicker rings and more crossbars.


  13. cid_55F56048-7B53-4F56-B11.jpg

    (found here)

    I'm still waiting for cardesignnews to give me some information about the chair,

    but maybe you guys know a nice way to tie/finish off ropes?

     

    Rope-Clamps.jpg

    376302.jpg

    tn_e50_7.jpg

    Problems with the above are;

    - When squeezed their various orientations would turn it into a chaos.

    - For some the diameter is too big to place ropes next to each other.

    - Some are not wide enough to have sufficient friction.

    - Cords will sag over time.


  14. 3D-Drawing.jpg

    Hi people,

     

    Above is a proposal for a human wheel I would like to make, the inner cylinder would be perforated.

    The difference with a hamster wheel is that it wouldn't be stationary and is able to take ( large ) bends.

     

    There will be a first estimation of the thickness of the materials (the rings shouldn't be able to amputate a hand, but shouldn't destroy too much grass either), the amount of crossbars and the diameter of the outer rings (wider than the palm of a big hand) using the Cosmos-software. The structure as drawn above would weigh ±80kg in TIG welded aluminium AW-5083, maybe fibreboard is an option too.

     

     

    But I was wondering how to define the:

    - width of the cylinder a

    - diameter of the two rings in the middle b

     

    to make sure:

    1) the wheel is not too heavy to make it roll

    2) it is not too difficult to make the wheel lean to one side

    3) the wheel is unlikely to fall

    ( 4)the bends it can take are not too large )

     

     

    1)

    1.jpg

    The two forces that I think decide whether the wheel is going to roll or not - friction and gravity on the person - seem to work in different directions?

     

     

    2)

    2.jpg

    The wheel will lean to one side when the combined centre of mass of the wheel and the person in it is not positioned above the resting surface.

    (mw.xw - mp.xp) / (mw + mp) = 0

    This can be reduced to a function of a and b.

     

     

    3)

    3.jpg

    The wheel will not fall when the combined centre of mass is positioned above the resting surface. But what is the influence of inertia - as a result of the leaning movement - on the position of the combined centre of mass?

     

    All of these could result in a graph with a and b as axes from which I could deduct their ideal value.

     

    Thank in advance!

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