Monday, 19 July 2021

An Eco-friendly Dream Holiday

 This piece was a creative writing exercise for the MA (in progress).



Win! Your Dream Holiday!

Just describe it, and one lucky reader will go on their Dream Holiday.”

We all want to be lucky. It’s been a while since I last thought about it, but you want to know about my Dream Holiday? It ambushed me while I was sorting through boxes in my father’s house after his death. There they were: the souvenirs of a life spent travelling. It was my boast, when younger, that I had been one and a half times round the world before I was three. Of course, I never remembered any of it. But I Dreamed: one day I would go diving on the Great Barrier Reef.  

The Adventure

People laughed – adventure was for boys not girls. The books that fed the Dream said the same thing.


The great adventure stories by Willard Price starred two boys collecting animals for their father’s company. Television programmes filled the Dream with Technicolor but had no place for girls as they hacked through the jungles of Borneo or sailed the South Sea Islands. But the 1970s were a rapidly changing era, as one of my favourite writers, Terry Pratchett, later said “if you ignore the rules, then people rewrite them so they don’t apply to you”. As I was learning how to kayak and rock climb, things that only boys should do, attitudes were also changing.  In my earliest dreams I go coral diving among the brightly-coloured fish and bring up treasures from the depths, but as I grew more aware of the pressures on the natural world I saw the damage and wanted to save it so others who came after me could see it too.



The Diorama

During the Great Sort Out of my parents’ belongings I came across a diorama encased in resin: a true gem of the tourism industry. As I twisted it in my hands, delighting again in seeing the seahorse apparently swimming through purple coral while a starfish lounged on the sand beneath, the old Dream jumped out: one day I had been going to collect my own diorama from the coral reefs. I even learned how to cast resin.

By the time my parents arrived at the Great Barrier Reef, in the late 60s, tourism was strong. Before then you imagine the women in their prim white dresses and sunbonnets, accompanied by men in their stiff Sunday suits picking up shells and coral from the reef at low tide. Even when my parents visited it was mostly daytrips in glass-bottomed boats. Collecting the specimens for the diorama must have been done by professional divers, bravely swimming through the clear waters, with the new aqualungs that had first appeared in the war. I pictured them snapping off coral and ramming starfish into a collecting bucket. Tourist divers rolling backwards off the boat arrived in the 70s and 80s – and that was when, with images from our new colour telly dancing in front of my eyes, that I first had my dreams of diving the reef.

The Pearls  

Eagerly I dip my hand in the box again; this is like tour of my dream. I take out and open a red case. Sixty silvery orbs nestle in black velvet. I tip them out; they feel like silk in my palm. In these days of cultured pearls, my mother’s necklace of sixty matched pearls is nothing spectacular, nor will it be worth much. When it was purchased, over fifty years ago, the matched pearls would have been worth a fortune.

Divers jumped into the clear water with no mask or breathing equipment, with only a basket around their neck. Powerful thrusts of their legs drove them down.  A basket hanging around their necks, once full the diver took it off and tugged on the rope attached. On the boat above men hauled the basket and the diver to the surface. With the basket emptied, the diver ducked under the waves again. Sometimes they held a large rock to drag them to the bottom without the effort of swimming down.

It was a dangerous business. Japanese women dived through heavy curtains of arame seaweed, all the while wondering if this dive the sharks would get them. Pearl divers are rare now; young people won’t make the dangerous dive when there are safer options. Grafting a foreign body into an oyster to encourage the formation of 'cultured pearls' makes the job so much easier. Tourists swim in shallow lagoons checking over the oysters hanging on ropes. Pick your own – like strawberries.

“Over here,” I imagine a swimming guide saying, “are the two-year olds.”

Once opened, they produce pearls of a quality seen in my mother’s necklace. 

The Fisherman

Up ahead in our Dream tour, you can see the gaping crevice where bottom trawling has dragged the coral out of the reef. Overfishing means fewer fish, which scatter away from our lights. Some fishermen squirt cyanide into the water to paralyse the fish, making them easier to catch. Or worse yet, they use dynamite which stuns the fish and destroys part of the reef with it.

I dust the passing years off the next souvenir from the box; I’d like to think the carved Chinese fisherman would disapprove of the wholesale destruction; he uses a pole and line. He would never use a plastic net then discarded it as it snagged on the corral. Rotting fish are trapped in the weave. Old and damaged equipment  thrown overboard onto to the reef causing ‘Ghost Fishing’. It’s not just fish trapped; there are heart-warming internet videos of humans cutting turtles and whales out of nets. 

Did you see the picture of the deformed turtle shell caught in the plastic beer holder? Many sea birds are dying because they are eating the bright plastic thinking they are shellfish. In June 2016, thirteen sperm whales washed up dead on Germany’s coast with stomachs full of plastic.

The Coral

I stare in dismay at the final souvenir to emerge; it’s a piece of white fan coral. Mass coral bleaching events have filled the news this year, turning the coral reef ghost white – like the souvenir from my box. 2016 was a disaster year for coral reefs around the world. Mass coral bleaching events filled the environmental newsfeeds. With human over-reliance on burning fossil fuels, the ocean water is now too warm. The coral expels the colourful algae. And when the coral dies, the diversity plummets.

Agricultural run-off from modern intensive farming leeches into the ocean. Green algae blankets the coral, our dream tour is becoming a slimy nightmare.



Just when we are despairing, many countries are banning the plastic bags that sea turtles mistake for jellyfish and eat. Reef fishing is being brought under tighter control and we have learned that despite the massive bleaching events some coral can recover. Scientists have discovered heat-resistant algae that can help the corals.

There are creatures, like turtles, which have swum the seas of the Great Barrier Reef since the time of the dinosaurs. Yes, we all want to be lucky and ‘Win’, but we need to act now to save the reefs or there will be nowhere for our children and grandchildren to take their Dream Holidays.

 

 





Tuesday, 11 May 2021

Eagerly Awaited

 Last week was a bonus week for me. Three books I have eagerly awaited finally appeared on my Kindle. And as Luck would have it they arrived on three separate days so I was not forced to choose between them.


First on my reading list was The Dispatcher: Murder by Other Means. This is the second book in what I hope will be a long series of novellas. In the first book, Author John Scalzi established that it was now impossible to commit murder; the victim arrived confused, naked but very definitely alive in their own bed ready to point out their murderer. Having set this out, Scalzi now shows how determined and inventive people can be when it comes to disposing of the unwanted and in the way. Tony Valdez, the despatcher of the title, once again has to work with the police, but this time he has to prove he is not a cop-murderer. In the end, he shows that he is human too, despite being a state-sanctioned killer. My only grumble about the book is that I want more: a novel not a novella. That said the story fills the space allotted to perfection.

⭐⭐⭐⭐⭐


 

The next book to arrive on my Kindle was Three Twins at The Crater School by Chaz Brenchley. My first thought on seeing this advertised was The Chalet School Series that I loved as a child (not admitting that I still do read them). I was not disappointed. The setting is Steampunk, with the British Empire encompassing a colony on Mars. They seem to have done something a bit creepy with Queen Victoria as there are a few mentions of the Empress Eternal ascending her Diamond Throne. Of course there is a girl’s school on Mars, full of plucky gels doing things their teachers cannot do. I got flashbacks to The Princess of the Chalet School and Redheads at the Chalet School, with a side glance at Mallory Towers. An old hotel has been turned into a school for girls. There are Martian beasties to beware of and plots from the evil Imperial Russia to thwart when three new girls arrive at The Crater School. At the end, there are a few too many unforeshadowed new characters; ‘Uncle Murch’ I can understand, but a little hint would have been nice. ‘Pete’ the schoolgirl engineer arrives and does nothing that the plucky gels we already met could not do. My thought is that the author is setting up for another book, but it seems clumsy in an otherwise smooth fit for the School Story Genre.

⭐⭐⭐⭐



Ever since I met up with The Nine Lives of Catseye Gomez by Simon Hawke I have wanted more wisecracking Feline PI stories. Finally, someone has written about my purrfect PI. Gobbelino London and a Melee of Mages by Kim M. Watt arrived on my kindle last of all. First off, may I say I love the reference to Gobbolino the Witches Cat another of my favourite Felines. A Melee of Mages is the fourth book in the series where our feline PI Gobbelino London (who lives in Leeds but don’t judge him) and his partner Callum North (but he prefers to be known as Callum London) struggle to make a living as private investigators in a human world, that mostly ignores the magical Folk who live anonymously among them. Tensions have gradually increased over the series to the point where this book is one long Trap for our wisecracking cat and his partner. There is still more to learn about the murky pasts of both Gobbelino and Callum. The baddies are stopped from taking over the world, but they escaped to try again another day.

⭐⭐⭐⭐⭐


Tuesday, 20 April 2021

Superglue: The surprising (to me) hero of forensics.

 

Superglue is one of the unusual heroes of Forensic Science. In an episode of the BBC’s Death in Paradise, the detective uses it to develop a some fingermarks from inside a pair of surgical gloves.

Did I just say FINGERMARK rather than fingerprint? Well yes, I think the entire cohort I took my course with learned that lesson on the first semester end of term paper – it was  -½ a point for each time we made that mistake.

To be clear:

FINGERPRINTS are the clear, complete images taken at a police station by a dedicated officer.

FINGERMARKS are the dodgy half imprints left behind at a crime scene.

Superglue or rather Cyanoacrylate fuming is primarily used for non-porous surfaces like that surgical glove mentioned about. And of course, the readiest form of cyanoacrylate is superglue. The method was discovered in the late 1970s by the US army stationed in Japan. The cyanoacrylate reacts with moisture to create a hard coating over the lines in the latent fingerprints, and it prevents the mark from accidentally being rubbed away. If you have a big enough ‘fuming cabinet’ it can hold a lot of items that need processing making it a cost effective volume processor for when a number articles are held as evidence. The fuming process produces a faint white mark that requires an extra stain in order to see the print. The vapour also leaves a white residue on surfaces of the cabinet. The fumes from superglue are noxious but not toxic[i].


So who had the brilliant idea about fingerprints in the first place? Sir William Herschel, a British Administrator in India, used fingerprints in1858 to validate civil contracts. The first use in a criminal investigation was in 1891 by an Argentine police official, Juan Vucetich, who used a fingerprint on a door frame to prove a woman had killed her own sons[ii]. In 1901, Scotland Yard adopted the use of fingerprints in identifying criminals, although the fictional detective Sherlock Holmes used fingerprints to solve crimes in stories published before then[iii].

The main issue with fingerprints is they are often ‘latent’, which means hard to see, and require some form of enhancement. The oldest method of fingerprint analysis is the use of silver nitrate. On exposure to sunlight the white silver nitrate, bound to the Chloride in the latent fingerprint, turns black. However, after about a week details in the fingerprint fade and this makes it difficult to make a long-term fingerprint data base. Which is why, nobody uses this method anymore[iv].

The other main method in use at the moment is Ninhydrin dye. Ninhydrin dye is attracted to ammonia and primary and secondary amines – compounds with nitrogen in them – in the sweat residue of fingerprints. The advantage of ninhydrin is that it can be used to enhance a fingerprint on porous paper, as well as the non-porous surfaces that superglue works on. The porous substance is dipped in ninhydrin dye and left to dry – usually for 48 hours but this can be hurried along by warming, as in the case of this experiment. Once dry, the fingerprint is displayed by a deep purple colour called Ruhemann’s Purple, after the man who first noted the effect in 1910. It is also good for enhancing old fingerprints, but the reagents are expensive. As the ninhydrin remains on the treated surface further prints can develop if it is incorrectly handled[v]. Ninhydrin is toxic and an irritant. If gloves are not worn when handling the ninhydrin coated paper then the holder’s fingers will also turn purple.

There are other methods of developing fingerprints but they tend to be more expensive like gold plating the fingerprint, which is long-lasting but not practical for everyday police work. 

For those of you for whom this is not new information, I had never watched an episode of CSI or other serious cop shows. I walked into the Graduate Fair at the University of Strathclyde expecting to sign up for a Pharmaceutical MSc or other Bioscience. Somehow, I ended up getting talked into Forensic Science. I started that course from cold, 30 years after finishing my BSc (hons) Biochemistry, 20 years after I had to give up laboratory work to care for my Autistic son.

And I loved it.

So to me superglue is marvellous, the cheap and cheerful method of storing fingerprints and fingermarks to create a decent database.  


[i] Penven, Don. (2015) ‘Developing latent prints with super glue’, Crime Scene Investigator Network. February 27. [Online] available at https://www.crime-scene-investigator.net/cyanoacrylate-fuming-a-mainstay-of-crime-scene-investigation.html (accessed 28/09/2019)

[ii] ‘History of Fingerprints’ (2018) Crime Scene Forensics, LLC, Concord, NC; www.crimescene-forensics.com [Online] available at http://www.crimescene-forensics.com/History_of_Fingerprints.html (accessed 28/09/2019).

[iii]O’Brien, James. (2014) ‘Sherlock Holmes: Pioneer in Forensic Science’, Encyclopædia  Britannica, Inc, March 31 [Online] available at https://www.britannica.com/topic/Sherlock-Holmes-Pioneer-in-Forensic-Science-1976713 (accessed 28/09/2019).

[iv] ‘Chemical detection Techniques’ (2019) Australian police.com [Online] available at https://www.australianpolice.com.au/dactyloscopy/fingerprint-detection-and-enhancement/chemical-detection-techniques/ (accessed28/09/2019).

[v] ‘Ninhydrin – visualizing of fingerprints’ (2019) Eviscan. German eForensics. [Online] available at https://www.eviscan.com/en/glossary/ninhydrin-visualizing-of-fingerprints/ (accessed 28/09/2019)

Wednesday, 14 April 2021

How Effective Are Pre-Laboratory Videos?

 

How Effective Are Pre-Laboratory Videos?

 

 

Presentation of Poster at MiCER2020 conference.

The Methods in Chemical Education Research held an online conference last year. My MSc supervisor encouraged me to attend the conference and present a poster to show my work. I was lucky enough to have my poster accepted for a presentation slot. These were held on June 11th 2020 in Zoom breakout rooms – each poster had its own room for 40 minutes. Conference attendees could switch between breakout room.

My poster was to be presented in session A, breakout room 8.



This was the final version of the poster I presented at the conference after taking in the advice from my supervisor Dr Patrick Thomson.

I had a short spiel, which I could keep returning to as people arrived and left the poster breakout room.

“My name is Vanessa Knipe. I’m an MSc Student reading Forensic Science at the University of Strathclyde.  Due to CoV-19 I am unable to do a regular lab project so I have invented this project to fulfil the thesis requirements of the MSc degree programme. As you can see I’m a mature student, due to a career break to care for my Autistic son it has been 22 years since I last worked in STEM, 30 years since I attended University.

“The project grew out of the startling difference in presentation of the subject matter, in fact I found the degree of ‘interactivity’ that modern students expect from their tutors to be very distracting.  In undergraduate practical laboratory sessions, and working in medical labs, we had been required to follow strict standard operating procedures but the MSc practical required interpretation of the instructions. The university provided pre-laboratory activities to help with the interpretation. I felt that the pre-lab videos were the most helpful of those activities and wondered if the other students shared that feeling. Did this feeling show any correlation with improved grades?

“As laboratory-based projects were not possible in 2020, I was allowed to undertake a statistical analysis of the grades of four years of students taking the course culminating in the cohort of which I was a part. In this time one of the practicals had a pre-lab video removed for what were considered good reason, so I could analyse the data of this practical against two controls, one with a video in all four years and the other with no video for all four years.”

As this was a Method in Chemistry Education Research conference, I took them through my intended methods using the simple flow chart shown below.



“Even when I was at University 30 years ago, I loved mathematic and statistics. When I started on this course they introduced me to Excel, which was nothing like the Excel I used to use. I could calculate the standard deviation of over 2000 results in under 2 minutes. I was charmed.

“I was also given permission by university Ethics committee to run a survey of students in my cohort. After evaluating the various survey platforms, they seemed to have similar functionalities, I chose Qualtrics on the basis that the University of Strathclyde already had an account.  This is intended to give me some numerical values which I can compare against the results of my statistical analysis and some written answers to give me a context in which to interpret my results. The written answers will be analysed using the methods of Thematic Analysis made popular by Virginia Braun and Victoria Clark at the University of Auckland.

“I hope to see whether or not the videos have been effective for the teaching of MSc Students, and also to write a script for a new teaching resource for one of the experiments which has no pre-lab video.”

For the actual day I used an outline version to prevent me just reading from a script instead of presenting the poster.

It runs as follows

  • ·         I’m an MSc student in Forensic Science
  • ·         Due to CoV-19 I am unable to do a regular lab project so I have invented this project to fulfil the thesis requirements of the MSc degree programme.
  • ·         It has been 22 years since I worked in STEM
  • ·         30 Years since I last attended University
  • ·         The difference in presentation of the subject matter in Lectures was startling.
  • ·         I found much of the interactivity parts distracting
  • ·         The laboratory part of the course required interpretation rather than following strict SOPs
  • ·         I felt the pre-lab videos very helpful with that level of interpretation and wondered if other students had the same feeling
  • ·         Did this ‘feeling’ about how helpful the pre-lab show any correlation with improved grades
  • ·         As I couldn’t do a laboratory-based project I was allowed to undertake statistical analysis of the effectiveness of the videos as my MSc project
  • ·         I hope to see whether or not they are effective and to write a script for an new teaching resource for one of the experiments that had no pre-lab video. 

I used this as a basis to run a circular talk which visitors to my breakout room could drop in and out again at the point where I started repeating.

At the end of each cycle I asked if there were any questions.

Two interesting questions were...

Q1 – I’m having trouble engaging my pupils with pre-lab videos, what have you found that helped.

A1 – I suggested that there was a difference between the traditional video that depicted a demonstrator at the front of the lab and the new style of First Person Perspective (FPP) videos using a Go Pro camera. This might help engage reluctant learners if the video was in FPP.

Q2 – As someone trying to do a project in this time, what was the most difficult part of making up a survey?

A2 – I suggested that my research had shown that nine minutes was the ideal length of time for a survey to take and I had difficulty in compressing my questions to fit that ideal time.

Both appeared happy with their answers.

I had an interesting discussion with another person about the usefulness or otherwise of Likert Scale versus sliders in the Qualtrics Survey platform.

 

Friday, 9 April 2021

Eclipse

 On the 20th of March 2015 there was an eclipse that came to about 93% of totality over the house where I used to live in York. 

I had just that Christmas received a new camera from my father so I was eager to try it out. I bought filters and everything.

At 8am the day promised to be absolutely perfect. I sent my son off to Sixth form with two pairs of eclipse specs so that he could share if they let the students out of class to watch. 







Of course the perfection didn't last. 


By 9am the sky had clouded over. And even worse, my special silver filters didn't photograph the sun through clouds. 






Wearing my pair of eclipse specs meant I could see the sun through the clouds that prevented my photography. Oh well, at least I'd see the eclipse, even if I couldn't record it.

That was when I had my bright idea. While the special photography filters didn't work, holding my pair of eclipse specs over the lens gave a sort of red filter that let me photograph the sun through the clouds. 


I achieved a series of shots by using the red filter when the clouds covered the sun and the silver filter when I had a gap. 

This is my favourite one. 



"Well! I've often seen a cat without a grin," thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

-Lewis Carroll from Alice in Wonderland.







Tuesday, 6 April 2021

The Intelligence Value of Drug Profiling

 

 What was I doing last year? I was at the University of Strathclyde reading for an MSc in Forensic Science. This post was originally a presentation, now adapted for my blog. 

The Intelligence Value of Drug Profiling

Before I signed up to this course I took the MOOC (Massive Open Online Course) on Forensic Science, run by the University of Strathclyde. While it was mostly about a Murder Investigation, the course content took a little side quest into drugs. In my previous work I did Drug Testing for recovering addicts and thought I knew quite a lot about drugs, but the MOOC taught me one new thing: by profiling drugs, that is identifying their component parts like cutting agents and route specific markers, you could link batches of drugs that came from same clandestine lab.

It is my ambition to communicate science to non-scientists, so I’m taking a slightly different angle.

In order to answer the question of the Intelligence Value of Drug Profiling we have to visit the 3 of the 6 Ws which are so important in a police investigation. Why do we need profiling? What are we profiling? And How does profiling work?

So…. Why do we need profiling?



    Detective Lola Cat is hunting for the source of illegal catnip in her town.

Illegal catnip is pouring into the small Scottish town of Dalry. Irresponsible dealers are addicting innocent kittens to the foul drug. Detective Lola Cat is hunting for the source. Juveniles of all kinds are more easily addicted to drugs and Detective Lola Cat is determined track down the clandestine lab or labs responsible for catnip products flooding the market.

Drug Profiling can help track down the source of illicit drugs

What are we profiling?




Drugs come in a variety of forms

Drugs come in many different forms. They can be tablet based or powders. They can be smoked, injected or swallowed. New products come on the market with alarming regularity. Intelligence is needed to find a link between products and dealers in order to shut down the supply.

Here are a sample of recent seizures of catnip-based products. As you can see, starting bottom left and going clockwise, there are the classic leaf-based products, pellets that are smuggled inside cat toys, edible products and the latest release of semi-synthetic catnip in the form of  sprays. This collection is from multiple different seizures and Detective Lola Cat needs to know if there is a link between them. The way to ascertain if there is a link is by drug profiling.

How does profiling work?

 


Drug profiling’ is defined as the extraction of a drug’s chemical and/or physical properties to be used in the application of policies against the illegal use of drugs. - Forensic drug Intelligence: An important tool in law enforcement.  Pierre Esseiva et all.

With drug profiling it is possible to trace a common origin of the product by looking at the added diluents and adulterants. A diluent is a chemically inert product used primarily to bulk out the drug so that more can be sold. Adulterants often have similar properties to the drug but can be obtained more cheaply and easily.

When the test results come back Detective Lola Cat finds these catnip biscuits have been adulterated with tuna. The analysis reports that none of the other products contain tuna. This Intelligence eliminates the biscuits as coming from the same clandestine lab as the rest of the catnip products and directs the course of the cat police investigation. Detective Lola Cat is looking at two or more clandestine producers of catnip.

Am I being a little silly and not taking this assignment seriously?

 


  Drug profiling - image from University of Strathclyde, Centre for Forensic Science, Future Learn open course website.

 

Not entirely. I admit I simplified a very complex subject matter to fit into a five minute presentation. 

This is how drug profiling works. Chemical analysis of a seized drug can show the ratios of drug to impurities. No matter what cutting agent is added, the ratio will remain the same. Additional analysis identifies the cutting agents. Two samples may have different cutting agents but the ratio of impurities in the samples is the same. That tells us that two different dealers could be obtaining their pure product from the same clandestine lab, before cutting agents are added.

The Intelligence value of Drug Profiling is that it gives the police linking information so they can follow the drugs back along the user/dealer network.*

*Keith Borer Forensic Consultant‘s Website. Available at https://keithborer.co.uk/news/drug-profiling-common-source-what-does-it-actually-mean-your-case  

 


 And remember, Detective Lola Cat urges your vigilance in protecting kittens from the dangers of catnip abuse.