studiot

So start your own thread. PS my apologies for the poor spelling in my previous posts.

Yes good point. I haven't yet read the new 2021 book, so I'm keeping an open mind, and the idea may turn out to be just huff and puff or it may lead somewhere. So I have tried to give just the unarnished bare bones for all to assess.

This is better discussed in the politics section of the board, rather than the science section. I do believe I already said all this. But I also meant that the solution requires the will to implement it and that is socio-economic / political. Many changes will be needed, there will also be false turns.

This is the meat of the linked article from Quanta Magazine. Anybody interested in discussing this idea ?

Hello, jacobus and welcome. I note cheyennegregory hasn't been back since last March, but I see that you are both from the more northerly parts of the globe. I would recommend you both read this book by the late physicist, Sir Fred Hoyle. Fred offers calculations as to the energetics of both the starting and stopping of ice ages and then devotes several chapters to examining mechanisms that can lead to both starting and stopping of ice ages and most importantly the timescale over which occurs. I cannot stress enought the brevity of the starting timescale. This brevity is due to the energetics of solar radiation and partly, but only partly due to the solar and terrestrial relative positioning and requires another powerful event to activate the on and off triggers.

Well spotted, the full paper is a 3.6MB PDF - not to bad, and better it's free. +1 I have sent a copy to my friend, who is chair of the Exmoor Beekeepers Association, for comment.

I don't believe I wrote anything in my response that could be taken as describing you as a nuisance. Since I put some thought and effort into it, I would be grateful for a proper response.

Well, 2% solution means 2g / 100 ml as the measures are given in mls. So 12 to 15 ml contain 2 x 12/100 to 2 x 15/100 g or 0.24 to 0.30 g added per kg. Also since you have confirmed they were working in millimoles (added to 100g of honey) We have from my previous calculation 0.024 to 0.03 g added to 100g or 0.24 to 0.3 g per 1000g or 1kg. this is all consistent. So I would suggest this piece suffers in translation It is not clear if an additional 1.2 to 1.5 ml of solution was added to a 500g jar, in addition to the trehalose treatment already made. This is what the text literally says. So I would suggest you need to try 0.24 to 0.3 g /kg. This would explain why the trehalose was added as a solution, not a quarter gramme 'pinch', which might not dissolve and distribute evenly.

First question : do you really mean between .07 and .087 millimoles per 10g of honey or do you mean moles ? The molecular weight of trehalose is 342.3 g/mole so So this makes the addition either between 0.024 g/100g and 0.03 g/100g or between 24 g / 100g and 30g / 100g. Please confirm which was in the article.

Perhaps but I am asking you to think about continuity and the consequences of what you mean by time travel ? The popular version of time travel, which you ae putting forward seems to imagine a sequence of individual, separate sausages lying along some part of the time line. So if you 'moved' the sausage at say t = 10 to another point on the timeline, you would generate a gap in time where that sausage originally was. This of course is quite different from what we experience when the sausage is laid along a space axis and you 'move the sausage'.

Didn't you mean chattle fence ?

Yes we should all do our bit. +1 But try getting my family to switch of the light or television etc when they leave a room. "Methinks the Lady doth protest too much." Perhaps your subject (Climate Change) is just too large to fit into one thread. Perhaps you should treat it like eating an elephant. So taking one of your points only, popultion control as quoted. This alone need at least one thread to itself and is a socio-economic / political issue not a scientific one. I would just like to note that nature has always (and still is) exercising its own form of population control. Swansont has noted that the birthrate has fallen in most of the more developed countries. But other subtler factors are also in play. It is not too long since negative population control was exercised by a state (The award of Heroine of the Societ Union to women had had 5 or more children). At that time Canada and some other countries had open door policies to immigration, Austrialia even paid peopel to come. On the opposite side of artificial control, genocide was practised somewhere or another on the plant almost continually throughout history and sadly is still going on today. Perhaps that is why it is such a sensitive subject. But all this requires a proper airing in a dedicated thread. Finally yes many other (scientific)approaches to sustainability have been published in the past from Schumacher's "small is beautiful" https://www.worldofbooks.com/en-gb/books/michael-braungart/cradle-to-cradle/9780099535478?gclid=EAIaIQobChMI0fbD5I2f8wIVBYBQBh0p9wAxEAQYAiABEgKpUPD_BwE to Allaby and his "Limits to Growth" To Cradle to Cradel by Braungart and McDonough https://www.worldofbooks.com/en-gb/books/michael-braungart/cradle-to-cradle/9780099535478?gclid=EAIaIQobChMI0fbD5I2f8wIVBYBQBh0p9wAxEAQYAiABEgKpUPD_BwE These thoughts are not new.

This is not actually true and demonstrates the difficulty with analogies. The radius of curvature at any point is defined as the radius of a circle which exactly matches the curve at the point concerned. The curvature is defined as the reciprocal of the radius of curvature. For flat geometry or straight lines the curvature is zero. If the curve is a circle then the radius of curvature is the same at every point. If we now let that circle expand so that the radius tends to infinity, the reciprocal of that radius tends to zero ie straight or flat. But for your parabola, the radius of curvature is different at every point and remains finite at all points between the vertex and infinity. So its curvature is never zero, except at infinity and the vertex. These two examples do nicely show the difference between local and global however. For a circle, changing the radius affects every point on the circle equally. That is global. For a parabola the fact that the parabola radius of curvature approaches infinity as the parabola approaches infinity does not affect (the curvature of) any of the points on the parabola which already have a finite curvature. Curvature for a parabola is local to each and every point on it. It's not zooming out that makes things approximately flat, it's zooming in.

Only two 3 countries We already went through this in excruciating detail in a previous thread.

Every system has its stengths and weaknesses so thank you to beecee for giving us the opportunity to fully discuss the one based on hydrogen. +1 A further thought / question occurs to me. What would be the design life of such a system? How would that affect the financial and energy whole life costs ? I note for comparison that since the widespread uptake of lithium based rechargeable batteries many are now finding the true cost when the batteries need replacing.

Cornwall? Please note the correct current name of our country as shown on a passport

three 4 countries...

Surely this is a simple application of The First Law ? When you have your vessel of hydrogen, liquid or gaseous, you have a change of internal energy ΔE = ΔH + PΔV The PΔV term will be at the high pressure within the vessel. All of that internal energy will be lost when the hydrogen depressurises to react at normal pressures.

I look forward to your scientific amplification of this claim.

Grown-ups read all the words Actually no I didn't introduce liquid hydrogen into the thread, the OP did. Quite rightly in my opinion, since discussion of the circumstances when liquid hydrogen may or may not be appropriate and the difficulties involved are very properly part of the discussion here. They are not irrelevant. And yes I did read all the words, which is why I replied offering you a link to a website discussing the some of merits of liqification. And yes you are avoiding discussing the gas which is already in use in liquified form for transportation purposes, notably LPG. @beecee Yes it is great to learn of improved methods of decomposition of water to generate hydrogen. But a good question is How much energy in the form of work needs to be input to collect and store hydrogen gas or liquid in reasonable sized containers ? Will not this reduce the overall efficiency if the system ?

Sure. There's lots to learn about heat pumps and variations on the theme as well as thing's your mother (or the salesman) didn't tell you.

New findings at Whitesands https://ww Earliest definitive evidence of people in Americas By Paul Rincon Science editor, BBC News website Published 2 hours ago image source, Bournemouth University image captionThe footprints belonged to teenagers and children who lived between 23,000 and 21,000 years ago Humans reached the Americas at least 7,000 years earlier than previously thought, according to new findings. w.bbc.co.uk/news/science-environment-58638854

What sort of heat pump ? Here are the last figures I posted

Just look around Google. Here are a couple of stills 700 × 394

I can't see where you think I disagree with this. Indeed we had a thread on hydrogen fuel cell technology for heavy plant (the heaviest possible vehicles under the Construction and Use (C&U) regulations, about a year ago. I only just reposted the link in beecees hydrogen thread. Again I don't see where you are coming from. Your descriptions and figures for heat pumps are way off. We have had several in depth discussions about heat pumps here. I freely posted costing and perfomance data for the system I fitted in 2016 in one of those threads. But really you should start a thread of your own about heat pumps since they are nothing to do with hydrogen, and this is meant to be a politcal discussion about hydrogen. Great technical question again. +1