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jimmydasaint

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Posts posted by jimmydasaint


  1. OK, you don't seem to understand what I am talking about and vice versa.  If you have an electrode giving a small voltage to a brain centre in a lab rat, it can replicate hunger or satiety. Now what would the EEG look like?  If you have a readout and you can replicate the ionic depolarisation, will it not replicate the rat behaviour?  

    I found this, slightly contradictory article about the uses of EEG, what is your analysis?

    Quote

    We created our own genuine facial emotional expression database for use in the study**. Participants viewed these stimuli while their EEG was measured. Then a classifier recognised which EEG features (power and coherence) corresponded to positive and negative emotions in each individual. We randomly selected 70% of each individual’s data from the positive and negative conditions, respectively, for each stimulus type. A pattern recognition algorithm learned how to classify the data into two separate categories (positive and negative). We then used the other 30% of the data to attempt to predict whether the participant was viewing or listening to positive or negative stimuli. The result is the percentage accuracy of this prediction. EEG power alone had very poor predictive power, hardly better than chance. In contrast, power and coherence together had excellent predictive power. The stimuli that produced the most accurate predictions were pure tones (95% accuracy); and the stimuli that produced the least accurate predictions were emotional images. This is unsurprising as tones are pure and unimpeded by ‘noise’, while images are varied in their content. The music was also highly predictive (93%); followed by the emotional faces (92%), the mood induction statements (91%) and finally the short video clips of emotional faces (87%).

    Although this was a pilot study with a very small sample, this study showed that EEG pattern recognition is a promising method for measuring individuals’ emotional responses to visual and auditory stimuli. Its accuracy depends on the validity of the trained algorithms and its capability to perform on new datasets. Further research will focus on whether this powerful method can be used to accurately predict how people feel towards images and videos of products, people, brands and concepts.

    http://themindlab.co.uk/detecting-emotions-with-eeg-patterns/

     

    A more accurate description by you should be in  the following lines, as this is a Science Forum: The evidence is not there yet to show a feedback mechanism for EEG.  Your ego gets in the way of your answers.

    And another. Bring your analysis and give your opinions clearly when they are opinions. My posts were opinions and I must clearly state this prior to further discussion:

    Quote

    Owing to the high temporal resolution and low cost of electroencephalography (EEG), it has been extensively used in recent attempts to detect emotional states due to its prominence in high temporal resolution but low cost. EEG and emotion correlation reported in numerous studies [1, 2] combined with computational modeling [3] enables possibility of automatically estimating emotional states. The use of musical excerpts as stimuli is considered to be a promising approach because music is understood to be capable of strongly eliciting various emotions [4]. However, very little is currently known about the subjective characteristics of human music perception

    https://link.springer.com/article/10.1007/s40708-016-0051-5


  2.  

    OK. If a person shows a pattern "A" for joy and this is reproducible then there is a profile for that individual called "joy".  If the signal can be replicated by electromagnetic means, let's say by microwaves or terahertz waves, does it not recreate the initial mind-brain conditions that existed previously for "joy?" 

    I thought stimulation of the brain with tiny electrodes could cause people to feel hunger or pain.  Using small electrical pulses could reproduce a feeling - why not using electromagnetic waves?  Your argument please.


  3. IIRC, there are about 13 factors for clotting to occur perfectly.  Heterozygotic males, namely XhY, have little  Factor VIII or IX but DO have platelets to aid clotting .  So, if I am correct, some clotting still occurs although it is imperfect. 


  4. I would find it totally wrong to speculate without having all the facts at our fingertips.

     

    Be patient and all will be revealed to you, and you may be given medical advice from genetic counsellors.  

     

    In the meantime, as a parent, I would need to do some further reading and would choose sites such as the following:

    http://www.friendshipcircle.org/blog/2012/05/22/13-chromosomal-disorders-youve-never-heard-of/

    If you need help in understanding any of the disorders, please respond and I am sure someone will help you.

    Good luck


  5. You are right, of course, we need a theoretical basis to explain the formation of heavy elements.  I like the theory of the triple alpha process - IIRC, it was proposed by Hoyle. who suggested that three alpha particles had the correct resonance (in the excited state) energy to form carbon. I take your point and agree with it.  I hope they are proved correct....  

    https://www.faraday.st-edmunds.cam.ac.uk/CIS/polkinghorne/lecture4.html


  6. Thanks for that quick answer.  Of course, heavy metals are required for the photochemisynthetic method. That makes it a health and safety hazard then and so unlikely to be used unless there is a secondary reaction where the acetate made is converted into a carbon-based fuel.  That is  a whole new field of investigation. 


  7. As a former biomedical scientist, forgive me for being a bit sceptical but, it goes with the territory.  The modelling activity was very interesting however...

    Quote

     

    While the scientists think the new study gives a robust picture of how large injections of soot into the atmosphere can affect the climate, they also caution that the study has limitations.

    For example, the simulations were run in a model of modern-day Earth, not a model representing what Earth looked like during the Cretaceous Period, when the continents were in slightly different locations. The atmosphere 66 million years ago also contained somewhat different concentrations of gases, including higher levels of carbon dioxide.

    Additionally, the simulations did not try to account for volcanic eruptions or sulfur released from the Earth's crust at the site of the asteroid impact, which would have resulted in an increase in light-reflecting sulfate aerosols in the atmosphere.

    The study also challenged the limits of the computer model's atmospheric component, known as the Whole Atmosphere Community Climate Model (WACCM).

    "An asteroid collision is a very large perturbation—not something you would normally see when modeling future climate scenarios," Bardeen said. "So the model was not designed to handle this and, as we went along, we had to adjust the model so it could handle some of the event's impacts, such as warming of the stratosphere by over 200 degrees Celsius."

     



    Read more at: https://phys.org/news/2017-08-dino-killing-asteroid-earth-years-darkness.html#jCp


  8. It seems that cadmium is seeded into bacterial culture and then the cadmium is crystallised, as a sulfide compound, on the surface in the form of semi conductors. The presence of cadmium is a limiting factor here.  How much of it is present in the Earth (estimates?) and what is the use of the acetate which is made as a photosynthetic product?  IMHO, this is exciting but at the first stage of making a useable fuel source for humans.


  9. 14 minutes ago, beecee said:

    Hi jimmy...Comments are of course welcome from anyone...I specifically mentioned experts because I'm only an amateur lay person myself.

    Thanks for that beecee.  I do recall that glycine was found in the corona of certain new stars and this finding reinforces my opinion that life is meant to occur all over the Universe.  However, there is a caveat, and a serious one, IMHO, the basis of life on Earth requires nucleotides (the building blocks of DNA) which are far more complicated than the complex molecules discussed in the abstract and could require a number of steps to reach the necessary complexity to form DNA.  The other issue involves how basic molecules could be transported to Earth for abiogenesis to occur. 


  10. IMHO I consider that the apparent altruism is not inadvertant but, significantly, posits a theory of mind in cetaceans. This is not a new proposition - there may be a sense of self-awareness that also involves some emotion. Although controversial, I would further suggest that the presence of spindle neurons in the anterior cingulate cortex (https://www.newscientist.com/article/dn10661-whales-boast-the-brain-cells-that-make-us-human/) allow cetaceans to have a sense of empathy towards other animals in their community which then manifests as a protective behaviour from a perceived enemy. It is difficult not to anthropomorphise elements of the whales' behaviour but I don't see an alternative. I see the protective behaviour with the seals as deliberate and empathetic. Cetaceans have been on the Earth for longer than humans and may have developed these behaviours for longer than us "sentient" beings.


  11. I don't know what your problem is, but I bet it's hard to pronounce.

     

    I'd agree with you, but then we'd both be wrong.

     

    I've been trying to see things from your point of view, but I cannot get my head that far up my ass.

     

    You're clearly unmolested by enlightenment.

     

    I'd have better luck picking up a turd by the clean end than engaging in an intelligible conversation with you.

    Destroyer quotes and so funny! Like it iNow.


  12. Well, I don't work in the field of immunology, I'm only interested in it. So I have a lot more less knowledge compared to someone working with it? Is this forum mostly for people like me who are "only" interested with it, but lack any deeper knowledge? Don't mean to sound rude or anything.

    Wow. Well I have a PhD in Immunology and have forgotten more than you will ever know about Immunology (wink). I don't mean to be rude of course but did you not understand the clear explanation given? (wink again). In animal models, to be precise, mouse models, RhoC is over-expressed only in metastatic cells. That means that it seems to be essential in freeing up cells from the original parent tumour and allowing them to escape in the bloodstream to form secondary tumours. However, these are animal models of disease and there is no guarantee that there will be success in treating humans. Also, you were correct, the primary treatment will be surgical or chemotherapeutic but then, if caught early, the vaccine will be administered to "catch" cancer cells with over-expressed RhoC and for them to be destroyed by cytotoxic T cells. This is not a treatment for all cancers but, for a significant number of cancers, it represents real hope. Is it good news from an immunological point of view? Yes. Treatment with siRNA has already stopped significant metastasis apparently. If you want to invest money with these guys and your clients are rich, then go with the investment.

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