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Showing posts with label Archaeology. Show all posts
Showing posts with label Archaeology. Show all posts

2024-06-26

2024-05-21 A little archaeological rant. ; Youtube comment formatting.

First find versus first occurence..

I was watching some thing on YouTube, about the "mysterious" "perforated batons" found across Eurasia for 50,000-odd years. Conventional theory has that they're tools for making some sort of rope - maybe plant-stem cordage, rather than sinew ... maybe also good for preparing sinew. No huge mystery there. But why are most 1- or 2 hole, but a few 3- or even 4-hole batons? Clearly not totally solved, but the "rope preparation/ handling tool" is pretty strong.

But I came up with this little rant, which is more generally applicable, and I think it's worth keeping a copy of. (YT comments use the USENET convention of *bold*, [hyphen]strikethrough[hyphen] or _italic_ AFAIK. I really ought to check up on their formatting rules.)

@YouTubeCommentator5527 "As it turns out they were invented 72.000 - 60.000 years ago"

They were invented before 72-60 kyr BP ; the oldest successfully dated finds are dated to 72-60 kyr BP.

In general, finding a technological artefact means you've found a widespread, popular, well-developed technology. The first several thousand years of a Palaeolithic "Leonardo of Ug", slaving away trying to get his "throw sticks at mammoth, but harder" device to work properly probably resulted in 1 small pile of broken prototypes outside a single ivory tower [mammoth ivory? it was used as a boulding material] at "Ug". But 10 years after he got it working, every single "Ug[X], of Ug" would have had one. A year later, their neighbours the Uggs of Ugli wanted ones, with "go-faster" stripes. Then Marketing came up with a "better" name (an atlatl - really?) ... and soon everyone on the continent had one. Including the inevitable ones that get lost.

The odds of finding those prototypes are far worse than finding the effective, widespread production model. Where is Benz's first "automobile"? One copy, in one single museum. Where are the Model-T Fords? In every second ditch, and abandoned barn ; broken by the side of innumerable roads. Everywhere.

I like that rant. I'm going to save it for re-use! Polish it a bit. If he weren't ded, yet, I'd apologise to Pterry for mis-(?)appropriating Leonardo of Quirm's Palaeolithic ancestor for a starring rôle.

From the same video, but quoting someone un-named : "the easiest way to be wrong about our ancestors is to underestimate them." Very true. Grahaam Hancock and the "Ancient Aliens" people don't dare think that, becaasue it would harm their sales.


YouTube Comment Formatting markup

Inevitably, there's a video. 25MB to download (plus adverts if you don't block them) to express what takes less than a line of text (all above - there is no more). Sheesh. It's also one of those incredibly annoying American drawls where you need to connect your phone to the defibrilator to get wake-up calls for a new byte of information. That is modern communications?

OK, I needed to edit that for clarity. The USENET encoding was of the form :

[tag] [no whitespace] emphasised text [no whitespace] [tag]

… and that seems to be what YT expects too. Reasonable enough - no need for wheel re-invention here. Somebody will probably try redesigning it to use picking from several thousand near-identical emojis, becauuse that is somehow "easier" than using a keyboard. [Shrug]

Now I need to focus on that Venus article.
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2023-08-05

2023-08 August Science Readings

August Science Readings

Well I'm only 5 days into the month as I start, this time.

Articles studied this August - some of which might go to Slashdot.
ToDo List Black Body radiation/a>
Latter-day Gamma-ray Coordinate Network
New evidence of plant food processing in Italy before 40ka
End of document

2023-08 August Science Readings.

And I've got to the end of the month with very little done. Other stuff in life. Several things got into the pipeline, but I haven't got time for.

To Do List - Black Body radiation & Mean Free Path

link

Once again a question of the form "If this [whatever] gets so-much hotter, how will it's colour (black body spectrum) change?"

OK, it's obviously a question for whatever equation produces the "hump" (log-log) or "spike" (linear-linear) graph in all the physics (astrophysics) text books. So I know qualitatively what will happen. But I want to calculate how much it'll change. Which calls for a spreadsheet.

    Specification
  1. Put in a base temperature, get a colour (peak frequency). Put in a second temperature, get a second colour.
  2. Tabulate temperatures and colours. One datum is that 2.83 K gives a signal in the microwaves - CMB. 21cm Hydrogen? Orange is arounf 1600k
  3. subsidiary : wavelengths for colours - it's got to be tabiulated somewhere. If only well-known emission/ absorbtion lines like sodium-D = yellow. Obviously this is going to be rather arbitrary.
  4. I shouoldn't neeed to plot the BB radiation curves, but I'd like to. Two temperatures, can OO(Calc) do "fill between"? Can Google Calc? Obviously ties into item 2.

Just listening to the radio, about getting stars started, and the concept of Mean Free Path reared it's ugly head again. Need to look at that too.


Latter-day Gamma-ray Coordinate Network

link

For a number of years (since ... when I was on CI$, so pre-2000) prompt reporting from space-based Gamma Ray detectors has used a mailing list to distribute alerts of spike in GR detections, and by inference, the occurrence of a gamma-ray burst somewhere on the sky. That system has been deprecated as larger numbers of "high energy events" are being monitored, from gravity-wave detectors (3 systems), neutrino detectors (3 operating, several in construction) gamma- and x-ray space telescopes amd other systems. That's annoying, because the simplicity of checking my email has been replaced with needing to register on a NASA website, download and install Python, compile and install several programmes (I'm not sure how many), and then get really informative responses :

 topic=gcn.classic.text.AMON_ICECUBE_COINC, offset=None
b'Subscribed topic not available: gcn.classic.text.AMON_ICECUBE_COINC: Broker: Unknown topic or partition'
topic=gcn.classic.text.FERMI_GBM_TRANS, offset=None
b'Subscribed topic not available: gcn.classic.text.FERMI_GBM_TRANS: Broker: Unknown topic or partition'

Which is as useful as something not very useful.

As so often, the documentation seem to know that all users will know everything about what and how a "streaming protocol" is, and how to use one. Which ... well they call it "Kafka", and the name is well-chosen. I know how K. felt.

OK, now I'm getting some "content" - I left the terminal with the python code running while doing other stuff :

topic=gcn.classic.text.FERMI_GBM_ALERT, offset=917
b'TITLE:           GCN/FERMI NOTICE\n
  NOTICE_DATE:     Mon 07 Aug 23 14:38:00 UT\n
  NOTICE_TYPE:     Fermi-GBM Alert\n
  RECORD_NUM:      1\n
  TRIGGER_NUM:     713111879\n
  GRB_DATE:        20163 TJD;   219 DOY;   23/08/07\n
  GRB_TIME:        52674.82 SOD {14:37:54.82} UT\n
  TRIGGER_SIGNIF:  6.7 [sigma]\n
  TRIGGER_DUR:     0.064 [sec]\n
  E_RANGE:         2-2 [chan]   23-47 [keV]\n
  ALGORITHM:       26\n
  DETECTORS:       0,0,1, 0,0,1, 0,0,0, 0,0,0, 0,0,\n
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230807610/quicklook/glg_lc_medres34_bn230807610.gif\n
  COMMENTS:        Fermi-GBM Trigger Alert.  \n
  COMMENTS:        This trigger occurred at longitude,latitude = 236.15,-12.07 [deg].  \n
  COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  \n'

Which isn't much help, but I'd also received an email with the same content. The email is more USABLE.


New evidence of plant food processing in Italy before 40ka

https://www.sciencedirect.com/science/article/abs/pii/S0277379123002093?dgcid=coauthor Quaternary Science Reviews Volume 312, 15 July 2023, 108161

(Prepared a while ago, offline. Stalled.)

If anyone actually thought about the implications behind the hype about the "Palæolithic Diet", none of this would come as a surprise. But since thinking about things is antithetic to the interests of the "influencers" behind the "Palæolithic Diet", then it's unlikely to get much traction from them.

Abstract : Evidence of plant food processing is a significant indicator of the human ability to exploit environmental resources. The recovery of starch grains associated with use-wear on Palaeolithic grinding tools offers proof of a specific technology for making flour among Pleistocene hunter-gatherers. Let’s get this clear – this is HUNTER GATHERERs making flour – and by implication, breads, porrages, gruels, etc. Just because they’re called “HUNTER GATHERERs” doesn’t mean that they’re living on mammoth steaks and bronto-burgers exclusively. As modern studies of modern HGs suggests, upwards of 50% of their calories come from the GATHER part of the lifestyle, and very often, it's gathering by the women-folk. Collecting tubers with a waen on the tit is probably less population-risky than mammoth-hunting while giving suck. Less appealing ot the "I wanna eat a mammoth-burger" crowd of Andrew Tate wannabes.

Continiing FTFAbstract : The recovery of starch grains on a Mousterian grindstone at Bombrini suggests that the last Neanderthals not only consumed and processed plants but also made flour 43 - 41,000 years ago. Starch grains attributable to Triticeae on Protoaurignacian grindstones at both sites testify that Sapiens were processing wild cereals at least 41,500 - 36,500 years ago when they expanded into Eurasia, long before the dawn of agriculture. Does that need expansion? The sites are in Italy, Bombrini cave overlooks the Mediterranean, near the Monaco border ; Castelciveta is in Campania, well inland, and is sealed by the Campanian ignimbrite from the Phlegraean Fields supervolcano in the outskirts of Naples (erupted 39,220 ~ 39,705 BCE). One of the caves (I didn't note which) has plant-preparation tools at two significantly different levels (ages), giving three sites at two locales. There’s no particular reason to believe that proto-Aurignacian in Bombrini cave is close to the same date as at Castelcivita cave ; it may be earlier, overlapping, or later. As always, other actual implements may not have been identified, as always, though the archaeologists have used a fairly broad set of criteria, andone of the tools was identified as such during excavation, allowing immediate "sterile" (dig sites aren't steril ; nor is soil) collection.

The dating at Castelcivetta has a latest-possible date in the sealing Campanian Ignimbrite deposit. The Bombrini specimens had “areas - including an apex - covered by carbonate incrustations formed during their permanence in the cave.” (OK ; clearly not edited by a native-English speaker. Bear in mind. I recently met "permanencia" in my Spanish as somewhat equivalent to "period of residence". Trivial point.) And they got U-series dates from that carbonate, giving a latest possible date there. Why the Campanian Ignimbrite is considered to mark the end of human occupation of Campania for a considerable period is left as an exercise for the reader.

From my PoV, it is interesting to see the morphology of the detected starch grains on the tools. That sort of material wasn't covered in my mineralogy microscopy. I note in particular the pseudo-isotropic bisectrix ficures of the starch grains under XPL ... which implies that their spherical shape makes them quite strong converging lenese in a generally plane (not convergent) polarisation field. I'll have to try to show that to the Microscopy Club if they ever meet again.

Fig. 4. Starch grains and phytoliths from the grindstones of Riparo Bombrini and Grotta di Castelcivita, at bright-field microscope and at polarizing light microscope… note specifically the extinction croses in the microcrystalline starch grains.

The body of the paper had a few worthwhile highlights too :

  • Half of each sample of B-A2 and B-M1 was also subjected to heavy liquid separation using zinc chloride, according to Mariotti Lippi et al. (2015). Why? What were they expecting to find? We’d use ZnCl2 to make density columns between about 1.8 and 2.5 SG, so that covers a lot of territory. Obviously looking ... ah, if the ZnCl2 is fairly dense, say 1.8 SG, it would float off starch (organic)grains at ~1 SG, but drop out minerals like calcite (2.7) quartz (2.6), and phyllosilicates (clay-ish, 2.0~2.6 SG) all while keeping the starches in a low-osmosis potential fluid.
  • In Africa a cobble used for grinding plant materials is mentioned from the Early to Middle Stone Age site of Sai Island, Sudan (Van Peer et al., 2003 “The Early to Middle Stone Age transition and the emergence of modern human behaviour at site 8-B-11, Sai Island, Sudan.” J. Hum. Evol. 45 (2), 187 – 193).” Which gets a Spock-Fascinating.GIF from me, not least because it's very old and a long way from the "Fertile Crescent" associated with the origin of agriculture.
  • New evidence of processed plant food is illustrated by pulse remains from the Late Middle Palaeolithic to Upper Palaeolithic at Shanidar cave (Iraq) and Franchthi cave (Greece) (Kabukcu et al., 2022 [Cooking in caves: palaeolithic carbonised plant food remains from Franchthi and Shanidar. Antiquity 2023 Vol. 97 (391): 12–28 https://doi.org/10.15184/aqy.2022.143 ]” I know the name of Shanidar – isn’t that the "crippled Neanderthal" cave? These two sites pretty well "bracket" the Fertile Crescent", but again, much eariler than the conventional "origin of agriculture".
  • From Kabukcu, above, Almost all sites from these regions dating to the Middle and Upper Palaeolithic and the Epipalaeolithic/ Mesolithic periods, for example, provide evidence for the use of wild almonds, which contain high levels of cyanogenic metabolites that can produce hydrogen cyanide. [...] Several other plants also feature prominently in the regional archaeobotanical record, including tannin-rich wild pistachios (terebinth), wild pulses (some containing neuro-toxic compounds) and astringent wild mustards. Most of these plants require several preparation steps to leach out unpalatable and/or toxic compounds prior to consumption. The long-term and widespread use of almonds, terebinths and pulses therefore suggests that Palaeolithic foragers developed processing technologies and associated food preparation practices that enabled their routine safe consumption. (Me : That's going to stay right OFF the Palæolithic Diet menus.) … new evidence concerning the long-term histories of Palaeolithic plant food use and associated food preparation practices from two multi-period sites: Franchthi Cave (Greece) and Shanidar Cave (Iraqi Kurdistan). We focus on the analysis of amorphous, charred plant aggregates retrieved from flotation samples from the two sites; … Franchthi Cave is located in the Argolid peninsula of southern mainland Greece. It was excavated between 1969 and 1976 by T.W. Jacobsen of Indiana University and M.H. Jameson of Pennsylvania University, […] Occupation at the site spans the Upper and Final Palaeolithic, Mesolithic and Neolithic (c. 38,000–6,000 cal BP) […] Shanidar Cave, “located on the western flanks of the Zagros Mountains of Iraqi Kurdistan, was originally excavated between 1951 and 1960 […] Since 2015, a team led by Graeme Barker has conducted systematic excavations at the site (Reynolds et al. 2015), during which the fragments analysed in this study were collected. Five charred plant aggregates were recovered from Upper Palaeolithic (Baradostian) and one further fragment from the Middle Palaeolithic (Mousterian) deposits. Various levels there 43 – 30 kyr BP, 54.4 – 46.05 kyr BP, 75 – 70 kyr BP […] based on their broad stratigraphic association with the well-known Neanderthal flower burial and the recently discovered Shanidar Z articulated skeletal remains, dated to c. 73 kyr BP (Pomeroy et al. 2017, 2020).
    All of the charred food remains were further examined under a Meiji MT6500 darkfield/ brightfield incident light microscope (magnification ×50–500) and subsequently mounted on SEM aluminium stubs and gold sputter coated (to a thickness of 20nμ) to allow for more detailed observation nµ ?? nm, surely? Beyond the Eastern Mediterranean and South-west Asia, archaeobotanical studies at sites such as Niah Cave (Sarawak, Borneo) have revealed evidence for the processing of the highly toxic Dioscorea (yam) and Pangium edule nuts from as early as 50 kyr ago, underscoring the complexity and deep ancestry of such food preparation practices (Barker et al. 2007; Barton et al. 2016). “Niah” rings bells for me. Not hobbits. But … just a few bones, though Palaeolithic.

All, uh, grist to the "Palæolithic Diet" menu's non-existant non-meat part. Not that it ever had any connection ot archaeology.


And that's all I've got time for this (last) month.
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2023-01-14

January Science Readings

January Notes Page

==================

Articles studied this January
Palaeolithic Writing An interesting interpretation of dots and lines on cave art.
Book reviewA bit of a change, notes on a book I was given.
Duolingo notes - FrDuolingo Notes for French course.
End of document

January science readings.

An interesting interpretation of dots and lines on cave art.

Cambridge Archaeological Journal : "An Upper Palaeolithic protowriting system and phenological calendar"

I started writing this as a WEIT column, but it's going wider.

They assert that dot counts and a "y-shaped" symbol on Palaeolithic cave art encode information about the breding/ gathering or migration times of the depicted species, compared to a "spring thaw" start date in the year.

It's an interesting idea - but it's a long way from Ventris and Linear B. As a syllabic writing system, Linear B has around a hundred elements, each of which represents (approximately) one concept (sound). So the proposal "Linear B means this set of sounds" has around a hundred elements on which it can be tested. That's enough elements of communication to be able to convey effectively any message in the language. What the computing people call a "Turing complete" system.

This proposal though ... I see four elements to the "writing system" (dots and lines representing a single item ("lunar month", it is proposed) ; the concept of counting itself ; the "Y" symbol, representing "giving birth" ; and implicitly they also need an agreed way of recognising "start of year" - which would probably be the winter solstice or some such marker of "start of year". Which is a bit thin for a writing system. Most non-ideographic writing systems contain a few dozen characters (alphabets, such as the Latin script I'm typing in), or a hundred or so (for syllabaries, such as Egyptian hieroglyphics, Cuneiform, and Linear B).

Archaeology, at least in Europe, is replete with structures that seem to have some relationship to annual astronomical events, for which a calendar purpose is often imputed. That would align temptingly with the need to have a point in the year to count lunar months from. But ... when you look closely at such structures in one area, you can see up to 45 degrees difference in alignment between adjacent structures. Which puts assignment of this structure to that calendar point, e.g. mid-winter solstice] onto creakingly thin ice.

Reading the paper itself ... they use the French term "bonne saison" meaning the springtime thawing of rivers, melting of snow and greening of the landscape as their reference time, not the mid-winter solstice. Makes reasonable sense.

[I don't know how much American monumental construction has survived to be recognised. I'd be surprised if there were none, but it's not a field I'm familiar with.]

This proposed four-element writing system reminds me of some of the "esoteric" programming languages - specifically Whitespace, which uses [Space], [Tab] and [Linefeed] (but not [Carriage Return], probably to make it DOS-compatible) as the elements of it's writing system. That is sufficient to implement a Turing complete language. But a lot of other common understandings between writers and readers are needed to get meaning out of what is literally a blank page. (Obviously, Whitespace allows comments. So in a program listing, anything the programmer can read will be ignored by the compiler. And of course a Whitespace program can be steganographically hidden in an otherwise innocent text.)

It's a very interesting idea for interpreting these artworks though. It may even be correct that it represents, for some "ritual" purpose [archaeological sense], something about birth/ death and or seasonal cycles. But to actually test that ... quite hard.

How this relates to modern writing systems is another big question. There's 35000-odd years between the peak of preserved cave art and the origins of our current writing systems. Which have fairly complete records from pictographic origins to their present alphabetic (and ideographic) - so these are very unlikely to directly represent a source for those writing systems. These markings may represent the roots of the idea of recording information for use by future generations (or just for teaching the next generation) - which is a necessary step. (The paper puts it as "artificial memory systems (AMS) or external memory systems (EMS) to coin the terms used in Palaeolithic archaeology and cognitive science respectively".) But a direct connection ... I'm not convinced (and the paper doesn't claim that :

"We may not be convinced that the Upper Palaeolithic sequences and associated symbols can be described as written language, given that they do not represent grammatical syntax, but they certainly functioned in the same way as proto-cuneiform. We may not describe them as ‘administrative documents’ as would a Sumerologist (e.g. Van de Mieroop 1999, 13), but that is exactly what they were, record-keeping of animal behaviour in systematic units of time and incorporating at least one verb. We do not want to press the controversial (and in many senses, semantic) question of whether writing was a Palaeolithic invention; perhaps it is best described as a proto-writing system, an intermediary step between a simpler notation/convention and full-blown writing"

- but it's going to be represented as that.


A bit of a change, notes on a book I was given.

link

Several months back a friend asked me to read a "based on fact" book - in whose real-world events he played a minor role. So, I did so. I'm not sure he got what he was looking for - I completely didn't engage with the topic of the book, but I was interested in how the author had been let down by the the publishing process. Which might raise some questions for people who are in their own process of writing a book.
Title : Sniper One
Publisher: Penguin Books Ltd
ISBN: 978-0-718-14994-9
Number of pages: 350

Published 2007 (I note that there is a 2008 edition which is some 30 pages longer. Some of my issues may have been addressed in this. I don't know, and without a friend nagging at me, I'm unlikely to hunt it down to read.)

The subject of the book was the activities of a British Army squadron (platoon, whatever - like I said, it's not a subject I'm interested in) working in southern Iraq during the "peace keeping" activities after "Gulf War 2" and the "regime change" which has been such a remarkable success. But that's not the fault of the squaddies on the ground.

The claim to fame (infamy?) of this “deployment” is that they were involved in the longest sustained firefight of a British Army unit. While "peace keeping". We really should re-introduce the row of pike-mounted heads of politicians ... over the entrance to the Houses of Parliament maybe? The book is full of various military derring-do, and a moderate amount of jargon. Which is where the technical problems start to come in.

The author used a ghost-writer. Well, no shame in that. Even royalty does it! But it's clear that the ghost-writer didn't have the same level of familiarity with the equipment and jargon that the professional (and nominal author) did have. So when the reader also lacks familiarity ... who did what, to whom, using what becomes unclear. Now normally, that would be something that an editor or copy-editor would pick up on, and send the manuscript back with a small forest of post-it notes for the author (or ghost) to attend to. Well, that round of editing certainly hadn't happened with the version I read (see note above about a 2008 edition). Which doesn’t speak well for Penguin Ltd, whose job this is.

There’s another complicating factor for books like this (by serving soldiers, in particular) – they have to go through a military censor too. I doubt they were In the slightest bit interested in whether the book was clear, or if the author made a fool of himself – as the current furore over some Royal’s autobio and his “kill count” shows.

In the following listing, page numbers refer to the 2007 UK hardback.
Error listing for Sniper One
Page number Comment or query
Front matter, x - xi The location map. My contact tells me that the version they had “on the ground” was decorated with various coloured legends on particular roads, allegedly intended to make life difficult for people listening in to radio traffic. “Going to roundabout Red 5” being less clear than “Going to roundabout between Amarah Street and Nasiriyah Road”. Which is fine enough in itself. Unfortunately, the reproduction in the book is in monochrome, and these distinctions have been lost.
That’s a common problem in publishing – getting figures to come out well, particularly in the body of a book (photographic plates are a different matter). So if you’re trying to get your book published, really pay close attention to what your editor tells you about figures. They (the publishing companies) probably can make do with a sketch in paint on toilet paper, but they’ll do a much better job if you can present your figure as a PDF, or some other electronic image format. The production process is electronic from the ghost writer to the delivery carton at the bookshop, and you may as well accept that, not fight it.
That doesn’t guarantee success (a correspondent in the 1990s was still let down by the quality of printing and poor contrast in his “trade” book, despite having done academic publishing for decades) but it improves the odds.
Front matter, x - xi Separate from how the presented maps were processed and reproduced is an issue of scale. A single figure isn’t adequate to give the reader either the strategic overview (where this site was in relation to Baghdad, to the British forces bases in Basra and to the British advance base from which this “CIMIC” outpost was supplied. Similarly the “town size” map doesn’t really display the environment around “CIMIC”, the fire lines, the ranges of mortars and different guns … That lack is in the hands of the author (and to a lesser degree, the ghost-writer). In my opinion.
Front matter, xix The author refers to heat detonating a high explosive bursting charge in a device. Which is not, typically, how high explosives work. As my soldier friend confirmed in subsequent conversations, this is covered in training (it’s important for rigging demolition charges, for example), but clearly someone had forgotten. Discussing that in a pub, we were both expecting the armed police to come bursting in at any moment – alerted by someone ear-wigging from the next table.
pages passim (Far too many to list.)

This is a jargon-rich field. Lots of GMPGs and Gimpys and DishDash. For enthusiasts, this may be fine. But for the casual reader, it gets very confusing.
The edition I was reviewing had 10 blank pages at the back. There was room for a glossary, and a crying need for one.

38 A related matter – both the original author and (probably) the ghost writer made some technical errors. One that caught my eye was a reference to a “silver compass”. Which sounds like military extravagance, but in fact refers to a trademark of the Silva ® company, who supply mountaineers and others with robust, single piece, easy to use compasses. Yes, I’m being picky, but I was asked to be picky. See also p.76
40 (when I noted it) Another point for the glossary : there is (unsurprisingly) a fair bit of discussion of ammunition. But which ammunition could be used in which weapon (so, which weapon’s ammo would be a backup for which other weapon) was something I still haven’t worked out. Again, it’s probably something that an enthusiast in this field knows already, but it’s (still, after conversation with my soldier friend) obscure to me. I’d hope an editor would catch such failures to communicate.
I had quite similar thoughts about batteries, battery packs etc. At that time, my soldier friend tells me everything ran on single-use alkaline cells, but rechargeable power packs are likely becoming more of a thing these days.
63 More for the editor – how long does it take to re-load a magazine. (My soldier friend tells me the bullets come on disposable metal-&-plastic strips, and it takes a few seconds. The Hollywood thing of pressing bullets one-by-one into a magazine is Hollywood bullshit. As is taping two magazines together so you can jam one up with dirt.)
72 In the description of an ambush, there was concern about leaving an immobilised vehicle behind, because (paraphrasing) it contained “sensitive” communications equipment. But if it’s that sensitive, shouldn’t it carry a self-destruct? Or the crew carry thermite grenades for it’s destruction.
76 Another bit of slip-shod editing : repeatedly the General Purpose Machine Gun, “GPMG” is mentioned. But when a “GMPG” is mentioned … the reader spends some time working out why that sounds wrong. Or is there actually a “GMPG”? Much brain-sweat is wasted.
81 I noted this as another point where I couldn’t get the text description to align with the map.
109 More sloppy copy-editing. Some of the right words, in – to misquote Morecambe and Wise - some of the right orders.
179 An unexplained item for the glossary : a “multiple” seems to be a grouping of people from several units. There is also a lot of radio traffic discussion that totally confused me. There seems to be a logic to this, but what it is isn’t at all clear.
188 Rules of Engagement prohibited shooting at non-combatants, and I raised the question of how an enemy sniper’s “dicker” differed from the author’s squad of snipers, each of whom had their own “spotter”. Therefore both are targets.
My soldier friend tells me that a later senior officer in that area agreed with that interpretation … and the “dickers” learned to keep their heads down.
189 A “dicker” is mentioned carrying a radio. Which raises the question of whether their side had encrypted or scrambled radios (we had a chat about Hedi Lamarr – which was news to my soldier friend), or whether the “Allies” had adequate listening capability.
191 The maps question from page x – xi got bad enough that I had to start trying to sketch my own map to work out who was where.
192 More glossary entries, an UGL (Underslung Grenade Launcher) and a Джке (Dshko ? – a Russian sniper weapon?).
201 This is where the need for an area map (S Iraq, or the area controlled by British forces) became obvious enough to prompt a note. Also, a “tree hook” was mentioned, leaving me somewhat puzzled.
203 What is a “sling set-up”?
242 Possibly related to p.201 and p.203, I asked about a “cheese cutter pole” – which is a protection against throat-cutting wires strung across a tank’s route.
254 Islamic martyr mythology doesn’t promise jihadis any “Vestal Virgins” – they were the (all too) human attendants of the hearth and temple of Hera in ancient Rome. If they got caught having sex, they’d be bricked up into the temple walls while alive.
287 I asked about the (popular) myth of a rifle being able to kill someone through a wall. To which the response was “what sort of wall”?

There were several other “Glossary” notes. Frankly, if asked to proof-read this I’d have gone through the whole text file, adding both “Index” and “Glossary” entries, then sent the pages to the author to be filled out. [Different word processors, different procedures.]

Well, I was asked to make comments on the book by my friend. I’ve done so. It’s not a genre I’m particularly interested in, but I learned more about military operations than I ever really wanted to. Now I can put it on the bookshelf and stop worrying about it.


Duolingo notes on French

PDF stored on Box

You'll have to click the "Download" button on the page that links to. Probably I can find a better supplier, but it's good enough for me.

I study various languages on Duolingo, which is a challenge-response based language teaching app. As I go along, I make notes of the Challenge-Response pairs, some of their grammar notes, and anything else that grabs my attention. Then, after each session, I go back through and revise my notes with the electronic equivalent of a highlighter pen. The link above is the first chunk of my notes from the French course. I completed the course in late 2022, with my note-taking methhodology developing in the process, ... and almost immediately Duo Inc® updated the course structure. Odd that. Not the first time either. Well, the PDF is 63 pages of notes from the first part of the course (I messed up, losing the intra-document links in making the PDF ; I'll fix that later with a revision.). The new bits of the course are more detailed (another 17 pages, just for two units of about 20 new "units") and I'm probably more consistent in my highlighting and links between grammar sections and course content section. But that'll come later.


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2019-04-11

Pleistocene Indonesian bathymetry

With the recent announcement of another quite old, non-human hominoid in SE Asia, once again people are asking questions about how such humanoids got there, as if these non-human animals were stupid, or incompetent, or ... whatever reason.
So, I did a bit of bathymetry work, since I've got tools to hand. I'm sure I'll use these again.
The common estimate for the decrease in sea level (compared to today) at the height of the last ice age, is 100m, so I've adjusted the rainbow colour scale to cover the 90-110m range ; anything deeper than that is marked in blue ; anything shallower is white ; present day exposed land is given an altitude palette.

Is Luzon isolated from the mainland by deep water? 

Bathymetry map SE Asia, 100m cut-off
On this first plot, there is an obvious wide gap to the north. It actually goes down to several km depth, but since you normally drown in the top few metres of water, that doesn't really matter. The minimum sea passage is several hundred kilometres. That's quite a challenge.

Phiippenes Bathymetry 100m cut-off
 Moving to the southern approach, the question is more complex. At a 100m lower sea level, there is no "dry" route to Luzon, but several of the channels are down in the few-tens of km width. These would certainly be easier for people to have crossed, regardless of their species. Whether that is how the Luzon hominids got in ... is at the moment a judgement call. But if I were looking for places to search for bone-bearing deposits, that's where I'd start. 

This next picture I just anticipate I'll need at some point. Constructed from the same data (GMRT) and with the same shading to differentiate 100m+ versus 100m- water depths, it shows the context of the Homo Floresiensis discovery site (Liang bua cave, my typo). You will note that at least one water crossing of about 30km or larger is needed to get from mainland Asia to Liang bua.
The sea to the north of the two Nusa islands is known as the Flores Sea, for which the species was named.

Plots done using GeoMapApp, www.geomapapp.org and the GMRT dataset they pick up.

2014-03-28

Skye, June, 2010

A couple of years ago I had a great  break on Skye, doing some archaeology, some walking, a bit of wildlife photographing, and just generally having a good time.
I posted a photo album about it on FaceJerkOff at the time, but since I've been getting increasingly distrustful of their policies since ... well, since they existed, to be honest, I've been taking my content off there in fits and starts, and I guess now is the time to move that album off too.

Uamh an Ard Achadh - "Cave of the High Pastures", or "Tin Can Alley" in times gone by (the current farmers are much more appreciative of it than previous ones, who just considered it a trap for their beasts). A natural limestone cave which appears to have been used as some sort of ritual site in the Mesolothic to early Iron Age, with modification of the cave entrance by dry-stone dyking, probably ploughing (ritual? - earliest agriculture in the area?) and the deliberate (or at least, non-accidental) burial of valuable artefacts.
It's a bit hard to see (this is not a site report!) but the meandering path of the deeply incised entrance runs away towards the dig which is in material piled up behind dry-stone dyking at the downstream end of the entrance passage.

The area is just plain beautiful.

 That's a nice view to wake up to in the morning.
 The fluffy highland coo. About as natural to the area as humans are, and probably imported from central Europe with the "Neolithic Revolution" around 5000 years ago. but they've settled in well.
 On Saturday and Sunday, the professional archaeologists have days of rest, so I did the same and took a boat trip around the islands of the Inner Minch - the so-called "Small Isles". A sea-stack with very evident columnar jointing - basaltic volcanism.
 Sea fidos. Gurt wet slobbering blobs.
 Arf!
 Puffins - they hardly look as if they can take off, and it's a huge performance.
 Basking shark. Big shark, no teeth.
 From the "behind the wall" deposits. It needs conserving properly, but it's an iron spear head. In it's day, this was your Porsche, crossed with an Exocet missile. Or something broadly equivalent. We may not know what was the process of thought was that led to it being positively buried behind a stone wall in a modified ritual site (which had probably been in use for a couple of THOUSAND years by this point), but we do know that it was not an accidental loss.
 Archaeologists often complain about being presented with finds "out of context". This is what they mean by "context" : each of those little white tags labels a "context" - a bed of sediment whose relative date (compared to other contexts) can be determined by the "A-overlays-B" and "C-cuts-across-D" arguments of stratigraphy. It's bread and butter work to an archaeologist (and I'm up to the eyeballs in the same sort of work drilling my oil wells), but it's absolutely essential to getting a proper understanding of a site (or oil well). And with it, we can do things like this :
 These are wooden fragments, possibly from a turned or carved bowl, taken from one of the "contexts in the image above. They're large enough to probably give a good carbon date to the context from which they come. AND thereby, they constrain the possible dates for many of the other contexts on the site.
Then along comes some creationist dipshit and dismisses this sort of work with "the archaeologists are lieing bastards who are blinded by their science to the power of our great sky fairy". Well, fuck you, god-squaddies - you plainly do not understand just how much hard, painstaking, detailed work you are casually brushing aside just to make yourselves feel less insignificant than you are.
These dingbats really do make me seethe.



To de-seethe, another bit of Skye's improbable scenery. The Old Man of Storr. See it before it falls over!
 There's a famous fossil site near the Old Man. It's a "no hammer" zone, but that doesn't preclude one finding excellent fossils in the beach debris. However ... when the site says "check the tide tables", it means "do not turn up on a whim without the slightest idea of the state of the tide". consider yourselves warned.
Lybster oil drilling site. There's an oil well of considerable weirdness being drilled there. The interest and amusement are pretty esoteric though.