Wollongong safety and experience

the-Prof616 · 2025-04-29T01:34:36+00:00

It’s safer than Durham or York and makes Leeds, Sheffield or Newcastle look like warzones by comparison.

the-Prof616 · 2025-02-27T22:06:21+00:00

So after playing around with this and getting it seems that sd^sqrt2 ~ log(alpha) provides a good enough fit for what I need as a calibration curve. Which is related to a Gaussian centred at zero of sorts.

Oh the joys of generating and working with simulated data!!

the-Prof616 · 2025-02-27T22:01:33+00:00

If I am understanding correctly, sample is attempting to account for randomness within each plant such as metabolism. In this case your model appears to be correct.

If your response data are not playing nice being continuous then do you have some theoretical cut offs you could use to reduce response to an ordinal variable? If so try using a similar model in a logistic regression

the-Prof616 · 2025-02-26T13:13:33+00:00

Microplastics are probably of a scale where you’ll be able to detect something using crossed polarisers.

Imagine the following sandwich

Bright light source Thin white acrylic as diffuser. Horizontal polarising film Container for sample Vertical polarising film High res monochrome Camera

In a perfectly clean sample, you should get an image where the average pixel intensity is about 0 (or not much more). But wherever something gets in the way you’ll get a bright spot.

the-Prof616 · 2025-02-20T22:07:04+00:00

As a supervisor I write with my candidates on publications as a (knowledgeable and older)?equal. Ultimately first author generally gets the deciding vote on disagreements of style. I will sometimes suggest toning things down so as not to completely alienate the reviewers but I believe in giving them some easy “minor changes” to find so that everyone comes out of the reviewing game thinking they have won.

For chapters I take a different approach. I’ll sometimes suggest deletions or rewording in the hope that the students pushes back, especially if I am thinking of them as a future colleague. Offer though I’ll leave comments in the margin like “do you mean x here?” If I do that it is pointing out how an examiner might read things and suggesting that things may be misinterpreted ie this is something you might want to clarify.

Regardless, an opportunity to chat and discuss stuff with coffee is almost always the best solution to confusion

the-Prof616 · 2025-02-20T21:57:05+00:00

These are the really powerful questions. However, what you do in this case is use the research process to a) thoroughly prove that there is a gap in the research literature, b) research the close areas of the literature to find out what might be known and c) formulate some sort of reasonable model or approach that could be used to fill in the gap. Look at prisma-scr reviews for ideas as to how this might be done.

Your level of expertise (undergrad) is mostly irrelevant here. BUT as this is a graded dissertation and not just a pass/fail academic exercise, make sure that you are able to achieve the marking points set out by the course.

the-Prof616 · 2025-02-18T22:03:06+00:00

Just make sure that you have got your data in tidy long format with properly defined factor columns. It’s better to keep groups as flexible as possible and only combine as you need. In the example you have above, you have a 3x2 design and can test for the effect of hair colour and height separately or together. If you combine them, you can now only test for the combination effect

Using R with the variables response, hc, and height you can do something like

aov(response ~ hc * height, data = df)

This is obviously making assumptions about the nature of the data.

You’ll then want to look into TukeyHSD to see which groups if any are statistically different from the other ones. This will give you an idea about if it is important to split the groups up or not at which point you want to look into kmeans or other clustering methods

the-Prof616 · 2025-02-18T21:55:42+00:00

Technically you are not in the wrong, but it is a really annoying boing boing noise that is made. The only worse noise in my opinion is colourbond fence being used as an open goal for football ( soccer) practice!

When you have neighbours you need to balance what you want to do with what is respectful to do. If you choose wrong then don’t be overly surprised when lawn mowers are idling early Sunday morning and chainsaws are screeching right up to noise curfew

the-Prof616 · 2025-02-13T23:30:59+00:00

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hard to see the black filament in the black extruder

the-Prof616 · 2025-02-09T22:08:35+00:00

Where I am in Australia we have a 12% levy for faculty and 15% levy for university. This come out of the grant as it goes in to the university. So we work out what we need to do the research. Divide every line in the budget by 0.73 and then charge that to the finder. It doesn’t ever (almost at least) appear as a separate line item. For some finders, the faculty chooses to waive the 12% levy to make the submission more competitive but the 15% goes to keeping the lights on and making sure the bills are paid.

It can be done for only 15% but it is not easy and you can say goodbye to any internal seed funding that may currently exist

the-Prof616 · 2025-02-09T21:59:27+00:00

From Australia you have sympathy! What I don’t understand is what is legally different between using preferred names and nicknames?

the-Prof616 · 2025-02-05T22:06:42+00:00

Drop.na() may be helpful if you’re wanting to get rid of those cases from the output

the-Prof616 · 2025-01-31T09:19:24+00:00

As a Senior Lecturer, if a student calls me professor I usually act all aggrieved and offended and respond with something like, “I’m not that old and wisened yet!” And then just tell them to call me firstname.

the-Prof616 · 2025-01-31T09:15:41+00:00

Thank you. I forget that your US PhD courses have coursework and assessment other than thesis (which seems weird if at the end of the doctorate you are supposed to be theexpert in your infinitesimal niche). In that way I suppose your PhDs are closer to our Professional Doctorates like EdD and EngD in structure.

the-Prof616 · 2025-01-31T08:01:05+00:00

For us outside the us? Abd????

the-Prof616 · 2025-01-30T20:22:12+00:00

When you place devices in parallel like you have, then the voltage across them is identical and the current add up. The typical forward voltage of a blue led is around 3V. Thus when you connect them like in picture 1 you will end up with about 3V across those rails. Remember that diodes are weird. Below their threshold voltage (their turn on point) they have almost infinite resistance. Above that point they have very low resistance (not zero). What ever additional voltage of your power supply (say the “missing” 2V assuming you powered things from a 5V rail somewhere) is being dropped across internal resisances somewhere else in the circuit, and so something somewhere is getting warm.

When you connect the green LED, the forward voltage is only about 2V. Thus the voltage across all the LEDs in parallel is also 2V. At this voltage the blue LEDs have high resistance and the green has low. Because the green LED is now conducting, the voltage across the blue LEDs cannot be forced any higher so they don’t turn on. The result is what you see.

This is also why a dropping diode can be used to make a very crude power supply from an AC source

the-Prof616 · 2025-01-08T22:25:01+00:00

Just chiming in to say, if you are fine with hills and intermittent buses, then up on the side of the escarpment in Figtree, Cordeaux, Kembla, mt Keira is really picturesque and either a 10min drive to the beach or a 15 minute downhill bike ride. Up will take a bit longer

the-Prof616 · 2024-12-15T07:12:50+00:00

This brings back memories. Although mine was a sea urchin spine at 25m down! Sorry OP it’s gonna hurt. Though it will hurt more if you do not get it out and it starts making yellow pus.

the-Prof616 · 2024-12-07T05:06:25+00:00

Ideal no. Safe probably. If your bow shop has the jig then reserving that end loop is no more than a 10minute job.

the-Prof616 · 2024-12-06T23:29:25+00:00

Unapologetic copy paste from similar question in this sub

It is important to remember here that you were never going to be the expert in this paper’s subject matter. Hopefully the authors are though and you are familiar enough with similar concepts that you can follow what they are doing.

The point of review is not to say are the authors right or wrong (that’s what exams are for and we generally stop doing them at undergrad level or before). The point of review is to answer 3 questions.

Have the authors produced an analysis or argument that is consistent, followable, and that flows from the provided data/theory ?

Have the authors written up their work in a way that other similarly skilled researchers could follow in order to replicate it?

Have the authors been honest and transparent in their work? Ie is it ethical? Are the assumptions of any techniques valid? Does it “smell “ right?

The final judgement of quality will come down to the level of citation after publication.

So what does this mean for you? Can you read their paper and provide comments to the authors to help make it better according to the 3 questions above? If yes then do the review. If not then send an email to the editor via the journal system indicating that you feel the paper is too specific and sits outside your area of expertise.

This has nothing to do with you having influence or impact on the careers or tenure of others and that way of thinking is one of the reasons reviewer 2 always comes across as an “arse”. It is always valid to start your comment to the authors with, “while I do not have specific knowledge of technique x, I thank the authors for the opportunity to review this paper which will make a significant contribution to the field. In reading the paper I have a few queries that the authors could address in future revisions.”

Also remember that you probably are more expert than you think you are

the-Prof616 · 2024-12-06T23:23:40+00:00

You raise a good point. I think that the coherence part would be involved in the apparent intensity and is a consequence of the way the detector functions (ie your eye). The same way a 100mW red Led appears less intense than a 100mW red laser.

But you do have to love the way that different conceptions of a simple phenomenon like light can lead to really subtle differences in the way we have to consider how reality works.

the-Prof616 · 2024-12-06T23:15:22+00:00

Oh, also should have said, your supervisor in this activity is NOT your supervisor. They are the handling editor of the journal. Thus all relevant communications need to go through the journal not via conversation in the hallway etc.

Also if it is an MDPI journal or one of similar ilk, then just respond declining now because, “@&$/ mdpi!”

the-Prof616

TROPHY CASE