Showing posts with label Tip. Show all posts
Showing posts with label Tip. Show all posts

Monday, 25 May 2015

Four really useful exam tips

Photo by Nguyen Dang Hoang Nhu on Unsplash

Recently, I asked some colleagues for some revision and exam tips, and this is what we came up with:

1. Do you know where and when the exam is being held?
It sounds obvious, but it is worth checking that you know where and when your exam will be held. There is nothing worse than spending weeks (hopefully) revising and then turning up at the wrong time and venue and missing the exam. Also, make sure you set more than one alarm clock if your exam is first thing in the morning, or get a friend or parent to phone you up to make sure you are out of bed and heading to the exam hall. 

2. Try to get plenty of sleep before your exam
Try to get plenty of sleep the night before the exam. Being sleepy during an exam is not good.  Don’t try to boost your alertness with caffeine, and do not pull an ‘all-nighter’ revising the night before the exam. That last-minute ‘cram’ very rarely works. 

3. Think Positive
In an exam, don’t panic, and think positive. If you encounter a question you don’t understand, move on. Don’t sit there dwelling on it; leave it and come back to it later. Be positive. Don’t panic.

4. Don't Dissect!
Do not post-mortem your exam, as that will only cause anxiety and distress. Resist the urge to talk to friends about the exam. As soon as the exam has finished, go off for a walk or a treat, and don’t hang around with your classmates who think they did brilliantly (“That was so easy!”) or who think they have failed (“That paper was impossible”). Resist the urge. 

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

17 Revision Tips....

Recently, I asked some colleagues for some revision tips, and this is what we came up with:

1.  Try answering questions from past papers
Have a look at past papers and try some of the questions. However, don’t fall into the trap of thinking that just because a similar question has come up in recent years, it will be on the following paper or thinking that as a particular question hasn’t been seen for several years, it must be due to make a return. Examiners are sneaky…..

2.  Don’t become a revision Zombie
Revising for an exam is hard work, but if you work smart and start your preparation early, you will reduce the risk of becoming a Zombie. Try to take breaks and do some exercise that clears the mind and gets the blood pumping to the brain. If you become a revision Zombie, please resist the urge to attack your classmates and eat their brains. If you see a Revision Zombie, RUN!

3.  Your brain is not a sponge - be an active learner
Your brain is not a sponge; it needs to be exercised. If you go to the gym to get some exercise, just standing there looking at the weights or the running machine will not do it. You need to be active; you need to be involved. The same is true of your brain. Just reading your lecture notes won’t do it. You need to be ‘active’. Read the notes, put them down (so you can’t see them), recall the material (re-write or redraw it), and then check it against your original notes. Doing this will strengthen the memory of the material.

4.  Keep your brain alert
Your brain needs food and oxygen. If you just sit there revising for hours and hours, you will get slow, tired, and sluggish, and your brain will not get the food and oxygen it needs to help you revise. Take a break, get up from the desk, and go for a walk. Clear your brain, and then come back and start revising again. You will be more productive and get more done.

5.  Don't waste time
Don’t waste time making your revision notes look pretty.  No one else is going to see them. Your notes should be functional and clear. They should be concise. They don’t have to be pretty and all coloured in with tons of sticky notes on the margin. Use the time you have to revise smartly. Revision is about revisiting material to refresh your memory of material you have already learnt. It is not about colouring in! 

6.  Find your best place to work
Find the best possible place for your revision. Ideally, it should be somewhere comfortable (but not so comfortable that you fall asleep), quiet or noisy (depending on your taste), and where you can control noise levels. It should also be free from distractions (smartphones, X (formerly Twitter), TikTok, YouTube, Facebook, TV, etc.). Once you have found your ideal place, use it!

7.  The Revision Timetable
Make a revision timetable and try to stick to it. Work out how long you have to the exams and how long you have to revise each topic. Don’t fall into the classic revision timetable traps: 1. You spend so much time making your revision timetable that there is no time left to revise (see Rimmer in Red Dwarf for an example); 2. You spend all your time revising for the first exam and forget that there are two other exams a week later. 

8.  Don't just sit there - get some exercise
Studies have shown that going to the gym after studying can help you recall the material. Don’t spend all your time revising; exercise and get your blood flowing.

9.  Don't just read, learn...
Just reading your lecture or class notes is not learning the material. You must be active to strengthen your memories and understanding of your notes. The easiest way to do this is to move the information in and out of your brain. Read the notes, re-write them in a different style (or draw them as a mind map or diagram) without looking at your original notes, and then check your new notes against the old ones. By doing this, you have moved the information into your brain (reading), out of your brain (making the new notes), and back in and out of your brain as you correct your new notes against the originals. This approach to learning is backed up by several studies and has been shown to work.

10.  Mix it up a bit...
Sitting there reading the same thing repeatedly or ploughing through your notes class after class is not learning; you need to alternate your activities to keep your mind fresh and learning. Try breaking your study into small chunks of learning followed by a small test to see if you have learnt and understood the material. Doing this will keep you fresh and alert and speed up learning. You never know; it may even make it fun! 

11.  Test yourself
When you revise, just reading the material will not make it stick in your brain, so you can magically recall it during the exam. You need to understand the material and make connections. You need to summarise and process the material. Reading is passive; learning is active. Try reading the material, and then after a short break, try recalling the material and checking your recall against your original notes. Doing this will test you so you will know how much you really understand, and it will help you strengthen the memory of that material.

12.  Don't Panic!
During the run-up to an exam, it is very easy to dwell on little things that would normally be insignificant in your daily life and start panicking. Don’t! Don’t listen to rumours, don’t dwell on the trivial, and if there is a problem, speak to someone—a classmate, a teacher, a lecturer, or a parent. The key thing is not to panic and to keep hitting the revision.

13.  Tick! Done!
Hopefully, you have prepared a revision timetable and are following it. If you are, one handy tip is to mark off your revision as you do it, giving you a sense of achievement and progress. It is always nice to tick something off on a to-do list.

14.  Treat yourself...
Constantly revising is not going to work. You will get tired and inefficient. You need to break it up. The easiest way to do this is by giving yourself planned treats. For each revised lecture or class, you could spend time on X (formerly Twitter), TikTok, YouTube or Facebook or watch TV. Is chocolate your thing? If so, then for every 30 minutes of study, you get two squares of chocolate or a biscuit (be careful, though, as this revision technique can lead to obesity). A slightly healthier option may be for every 30 minutes of revision, you go for a short walk. The choice is yours - treat yourself for all your hard work!

16.  Keep your brain active... Mix it up
Vary the material you revise to keep your brain active. Try something really tough and then switch to something easy. Mixing it up can help you retain information and improve your understanding.

17. Stop looking at social media!
Avoid temptation. Try to get quality, non-fragmented revision time. Stay off social media. If you are a social media junky, then use it as a treat to help you revise - for every 60 minutes of revision, you earn 5 minutes on Facebook, X (formerly Twitter), YouTube or TikTok. Put the phone down, lock it in a drawer, and resist the urge. 

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Saturday, 4 October 2014

Looking for an ELISA plate reader, and why you shouldn't get a HumaReader HS

Before I start this post I would just like to state that the views expressed below are my own and not that of my employer.

For the last 18 months I've been trying to buy an ELISA plate reader, with no success.

Admittedly enzyme-linked immunosorbent assays (ELISA) are not new and have in fact been around for at least 30 years (I first heard about them during my first degree, and they were viewed as a replacement for the radio-immuno assay (RIA)). So, on the one hand you could be argued that the technology is old and well-established, or that it's a technology that is had its day. Either way you would expect the market to be mature and able to provide suitable equipment.

When I started looking for an ELISA plate reader I was struck by how old all the machines appeared to be (in a number of cases designed in the 1990s, and a few machines in the early to mid-2000s), the poor design of their user interface and how difficult it seemed to be to get data in and out of the machine (one company offered me a machine with an attached dot-matrix printer - I had no idea such printers were still made, can you even get the paper). What was really surprisingly was how few of the machines could be networked, and how old the input/output ports were on the machines.

What I was looking for was a modern machine that could easily export results either directly to a server, or to a USB data stick. You wouldn't think it would be that difficult to find such a machine? How wrong I was....

After two rounds of procurement (nothing suitable in the first round, so I dropped my requirements) I finally settled on the HumaReader HS as it appeared to be the best of a bad bunch. The machine, from what I could see in the literature, did have a rather clunky user interface but, and this was in my opinion it's big selling point, it did have two USB ports, a LAN port, and an SD card reader. From what I could gather from various promotional leaflets and the user manual, the machine was able to export data and methods to the USB ports, and it could be connected to a computer for direct export to Excel (see below). To me this seemed to be a good match as it meant we could easily collect and export data from 25 to 30 ELISA plates in an undergraduate practical and then redistribute the data to the students for analysis.

IMG 1276

The HumaReader HS ELISA plate reader - it can read plates, but you can't get the data out of it...

The machine was delivered to us after 8 to 10 weeks and installed. It was only at this point it became apparent that the export to the USB stick was in a proprietary format (Why didn't the engineers think to do a simple CSV export? I guess they were not very good engineers?) that could only be read by another HumaReader HS machine. I really cannot see a reason for wanting to do this? Maybe the methods when setting up a number of machines, but why the data?

IMG 1278

Ports on the back of the HumaReader HS ELISA plate reader - there may be data ports, but don't make the mistake I did and actually think you can export data

So, strike one, no USB export. So to my fallback plane... Export to Excel.

Unfortunately the HumaReader HS doesn't even seem to be able to export to Excel. When I raised this with the company (both the local supplier and the actual maker of the machine) I didn't receive a satisfactory response. In fact today I received the email below:

"Good day to you.
After several attempts, we managed to sort the data to excel format by using a customized Microsoft word Macros’ script.
The process is involved few steps as following:
1) Transfer the readings from ELISA reader to Laptop (LIS format).
2) Open the data which in LIS format to notepad, copy and paste the data to Microsoft word.
3) Sort the data by using a customized macros’ script and the data will be saved in excel format.
4) Open the excel format data and sort the data accordingly.
In Upon the sorting, the data is as following and for detail please refer to attach file."

Is the company serious? It would appear they are! To have to do this for 25 to 30 plates in an undergraduate practical would be an absolute nightmare. What century are we living in?

Export

An extract from the HumaReader HS Reader promotional material...

How do other people cope? How do they get data out of the machine? Why would you design a machine from which you cannot export the data? Absolute madness.

Today I have told the company they can collect the HumaReader HS Reader from the lab, and refund the money.

So, I'm back in the market for an ELISA plate reader. As for the ELISA practical running in a few weeks? Guess I will have to be creative...

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Declared conflict of interest: I am really interested and supportive of open data standards that allow the sharing of data between scientists and different labs. I heave worked on data standards in proteomics and was involved in establishing the 'Minimum information about a proteomics experiment (MIAPE) standard.

Thursday, 10 April 2014

The importance of cell referencing in Excel spreadsheets...

Using Excel correctly in the lab is an important skill to develop, and students sometimes get this wrong by failing to correctly use cell referencing and instead "hardcoding" key numbers into the formulas they are using. The consequence of doing this is that if the student later changes any of the numbers, these changes will not cascade through the spreadsheet, and this can lead to errors.

The video below demonstrates the importance of cell referencing and why it should be used as opposed to "hardcoding"...

The key points are:

  • When analysing scientific data, the only number that should be entered into the spreadsheet is the raw data
  • All calculations being performed should reference cells (e.g. A2) used for the calculations and not contain numbers (e.g. the number from cell A2

So this means that cells should be:

Correct

And not...

Incorrect


If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Saturday, 9 November 2013

E-mail - dark social media? I think not...

Yesterday evening, I had the privilege of engaging in a thought-provoking discussion with Alan Carr on the pervasive use of email in teaching and day-to-day communication.

I won't repeat my views and opinions via email here, but you can read them over at Scitable:

  1. My hypothesis: e-mail is evil and deserves to die!
  2. Problems with email….. I appear to have touched a nerve...
  3. What is wrong with e-mail? Can it be fixed?
  4. What is wrong with e-mail? Can it be fixed? - The Programmers
  5. What is wrong with e-mail? Can it be fixed? - The Receiver and the dreaded FYI
  6. What is wrong with e-mail? Can it be fixed? - The Receiver and meta-data
  7. What is wrong with e-mail? Can it be fixed? - The Sender
  8. What is wrong with e-mail? Can it be fixed? - My battle to get e-mail working again - some tips and suggestions

Needless to say, I am not a fan of email... (as you may be able to guess from some of the above post titles).

Despite being overseas, I was determined to share my perspective on why email is problematic. Alan, a staunch advocate of email, graciously invited me to his session at SpotOn London 2013. I prepared a compelling video, just in case our Skype connection failed, to underscore the severity of the email issue.

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm