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Thread: Denied petrol

  1. #151
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    Quote Originally Posted by Derlyn View Post
    Dave, as the originator of this thread, I humbly request that it is now blocked.
    I think I've made my point.
    Ultra big LoL.....

    https://phys.org/news/2021-04-masks-...istancing.html

    Study shows masks, ventilation stop COVID spread better than social distancing
    A new study from the University of Central Florida suggests that masks and a good ventilation system are more important than social distancing for reducing the airborne spread of COVID-19 in classrooms.

    The research, published recently in the journal Physics of Fluids, comes at a critical time when schools and universities are considering returning to more in-person classes in the fall.

    "The research is important as it provides guidance on how we are understanding safety in indoor environments," says Michael Kinzel, an assistant professor in UCF's Department of Mechanical and Aerospace Engineering and study co-author.

    "The study finds that aerosol transmission routes do not display a need for six feet social distancing when masks are mandated," he says. "These results highlight that with masks, transmission probability does not decrease with increased physical distancing, which emphasizes how mask mandates may be key to increasing capacity in schools and other places."

    In the study, the researchers created a computer model of a classroom with students and a teacher, then modeled airflow and disease transmission, and calculated airborne-driven transmission risk.

    The classroom model was 709 square feet with 9-foot-tall ceilings, similar to a smaller-size, university classroom, Kinzel says. The model had masked students—any one of whom could be infected—and a masked teacher at the front of the classroom.

    The researchers examined the classroom using two scenarios—a ventilated classroom and an unventilated one—and using two models, Wells-Riley and Computational Fluid Dynamics. Wells-Riley is commonly used to assess indoor transmission probability and Computational Fluid Dynamics is often used to understand the aerodynamics of cars, aircraft and the underwater movement of submarines.

    Masks were shown to be beneficial by preventing direct exposure of aerosols, as the masks provide a weak puff of warm air that causes aerosols to move vertically, thus preventing them from reaching adjacent students, Kinzel says.

    Additionally, a ventilation system in combination with a good air filter reduced the infection risk by 40 to 50% compared to a classroom with no ventilation. This is because the ventilation system creates a steady current of air flow that circulates many of the aerosols into a filter that removes a portion of the aerosols compared to the no-ventilation scenario where the aerosols congregate above the people in the room.

    These results corroborate recent guidelines from the U.S. Centers for Disease Control and Prevention that recommend reducing social distancing in elementary schools from six to three feet when mask use is universal, Kinzel says.

    "If we compare infection probabilities when wearing masks, three feet of social distancing did not indicate an increase in infection probability with respect to six feet, which may provide evidence for schools and other businesses to safely operate through the rest of the pandemic," Kinzel says.

    "The results suggest exactly what the CDC is doing, that ventilation systems and mask usage are most important for preventing transmission and that social distancing would be the first thing to relax," the researcher says.

    When comparing the two models, the researchers found that Wells-Riley and Computational Fluid Dynamics generated similar results, especially in the non-ventilated scenario, but that Wells-Riley underpredicted infection probability by about 29 percent in the ventilated scenario.

    As a result, they recommend some of the additional complex effects captured in Computational Fluid Dynamics be applied to Wells-Riley to develop a more complete understanding of risk of infection in a space, says Aaron Foster, a doctoral student in UCF's Department of Mechanical and Aerospace Engineering and the study's lead author.

    "While the detailed Computational Fluid Dynamics results provided new insights into the risk variation and distance relationships, they also validated the more commonly used Wells-Riley models as capturing the majority of the benefit of ventilation with reasonable accuracy," Foster says. "This is important since these are publicly available tools that anyone can use to reduce risk."

  2. #152
    Platinum Member Derlyn's Avatar
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    I was not a pupil in a classroom. That whole gobblygook is about classrooms.
    Read the first sentence over and over until it sinks in. Classrooms brother. Read again. Classrooms.

    I was alone in my car.

    Are you really that brain dead that you cannot understand the difference between being in a classroom and sitting alone in your car ?

    You will have to try better than that, brother.

    Lekker slaap.

    Peace out ... Derek.
    Last edited by Derlyn; 06-May-21 at 09:03 PM.

  3. #153
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    wooooooooooooooooooosssssssshhhhhhhhhhhhh......

    HUGE ULTRA LOL....now that is truly funny!

    Thanks man, you made my day!

  4. #154
    Platinum Member Derlyn's Avatar
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    Glad I made your day, brother.

    Sleep tight.

    Derek.

  5. #155
    Diamond Member tec0's Avatar
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    Quote Originally Posted by Derlyn View Post
    @ tec0

    You must really be desperate.

    When you post with a quote, at least have the decency not to alter the post to suite your agenda.

    Nowhere in my original post was any one letter or sentence in bold text. That was added by you. Pathetic.

    And if you must know ...... I am the boss. I decide if I want to work. I decide when I want to work. I decide who I want to work for. I decide how much to charge. I decide everything, and I ain't short of clients. Hope that puts your mind at ease, seeing that you are so curious as to who the boss is.

    I do not work on industrial sites. Period. I have turned down major contracts with Daimler Chrysler and Portnet.
    Now you obviously want to know why. Let me once again put your mind at ease.

    Quite simple actually. I do not need the "kroon" and I do not wear safety boots or a hard hat. I am your worst nightmare.

    My existing clients are very happy with the service I provide. They are more worried about the quality of my work than what I wear.
    Heaven forbid. In summer we even take off our shirts and catch a tan while working. This is the Eastern Cape, my brother. Why do you think we live here ?

    Life is a bundle of cherries on my side, brother.

    Dave, as the originator of this thread, I humbly request that it is now blocked.
    I think I've made my point.

    Thank you kindly

    Peace out ... Derek
    No, i just needed to show you what it is that you demanded from a business and if that was reasonable? See even you "the boss" must follow the rules that is set out for you. Why? Because if you don't and depending on your situation you may be held liable.

    In your current situation you may not need any personal protection equipment but all the big companies that i deal with on a day to day base demands it. You will not get past security as simple as that. There is no room for negotiation when it comes to safety.

    Most electricians will tell you, it is the rules that keeps them safe. From the work they do, to the tools they use everything must be in compliance with the standards set out. I do see you are very upset now. That said when we where upset and heavy with loss. You did not mind to keep this thread going. Well here we are.

    As for me altering your original post. Adding your words in bold is hardly an alteration. But I will respect your request.

    Quote Originally Posted by Derlyn View Post
    Well, I suppose it had to happen sooner rather than later .....

    So there I was at a Caltex in Beacon Bay alone in my car wanting to top up with R400 petrol.

    I was denied service unless I donned a face nappy.
    I politely told the attendant what he could do with the petrol hose, drove half a kilometer further and topped up at Total, no problem.

    Caltex have now joined my list of businesses to be avoided in future for treating their clients like infants.
    Pick n Pay heads that list for trying to force me to push a trolley whilst buying a loaf of bread.
    Coca Cola has also recently been added to the list.

    Would it have been easier just to put on the nappy and get served ? ..... Yes.
    Would it have been the right thing to do ? .... In my opinion, no.

    The sooner we ALL call out the bull@#$# for what it is, the better for us all.

    Peace out ... Derek
    See you are the boss. So why did you expect "Caltex in Beacon Bay" to break every rule? Was that reasonable? Was your actions reasonable? Would you accept the demands from an unreasonable client?

    See in the end, regardless if your clients are commercial and or private they expect a degree of professionalism.

    Quote Originally Posted by Derlyn View Post
    Quite simple actually. I do not need the "kroon" and I do not wear safety boots or a hard hat. I am your worst nightmare.
    No you will not be my or anyone's "worst nightmare" you will simply be denied entry.

    But i rest i need to do my 2 hour walk before i start my day. Funny how i use my mask even if i walk alone.


    Enjoy.
    peace is a state of mind
    Disclaimer: everything written by me can be considered as fictional.

  6. #156
    Site Caretaker Dave A's Avatar
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    Quote Originally Posted by Derlyn View Post
    Dave, as the originator of this thread, I humbly request that it is now blocked.
    I think I've made my point.

    Thank you kindly

    Peace out ... Derek
    I think the matters of substance certainly have all been teased out. There has been little new of real value for a little while now - mainly a trading of insults.

    I've never been a fan of locking threads, but I believe this one is done.
    Thread closed.

  7. Thank given for this post:

    Mike C (08-May-21), SCW (07-May-21), tec0 (07-May-21)

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