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Posts posted by Klaynos

  1. So I know a good few people with PhDs, myself included. Mostly physics but some biology and at lease one languages...

    Of those the vast majority no long work in academia. Some did postdocs, some did not. Doing a PhD isn't just about learning/researching your topic it is about developing research skills and toolsets. 

    I would say people fall into a few different sectors, technical software companies (mostly modelling software), academia (the minority), research for commercial companies, telecoms companies and working for government agencies. Hardly anyone works on a topic closely or even loosely related to their PhD. 

    Some jobs people do include software engineering, technical sales, technical after sales support, translating between technical teams working in different languages, research, hardware development, product development (both physical and digital), fault modelling, data science in various forms etc...

    I don't talk much about my work on here, I joined my organisation at a graduate level with a PhD, not unlike many of my friends, 8.5 years ago. Compared to others with a master's who joined at a similar time I'm more senior than them now. To the point where I've chosen to not manage people and concentrate on research. I would say that that is not atypical for people with a PhD, join the same and out pace them in a couple of years.

    When working with people you can normally tell who went through a PhD by the speed at which they onboard with a project, the rapidity of generating and dismissing ideas etc... It's surprisingly noticeable even when dealing with people of similar experience and time with the organisation. 

    I'm very glad I'm no longer in academia. My contemparairies have less job security and far more pressure from their colleagues for few benefits. 

  2. On 11/16/2019 at 7:38 PM, Phi for All said:

    I bid on a design like this for an indoor storage facility. The system lights up the hallway 20 feet in front of you and turns the lights off 20 feet behind you as you walk down the hallway to your storage bay. Very efficient for a business where people are coming and going at all times, and should be viable for street lighting as well. The detectors can be set so smaller animals don't set them off. 

    The way things are going towards cars broadcasting data, you might not need to rely on motion detection. 

  3. Famous person says X. 

    Famous person says Y. 

    Famous person is famous for Y. 

    Sometime later X is shown to be wrong. Headline: "famous person was wrong". It's just lazy and annoying. Even if Y was"wrong" if it allowed for the thinking that resulted in what we know now it was valuable. 

    Knowledge changes and develops. Most new ideas which most people (even the clever ones) say will be shown to be wrong in 200 years. For most new ideas, the time to being shown to be wrong is minutes. 

  4. 10 minutes ago, MavricheAdrian said:

    I did the theoretical part (theoretical-philosophical), and I wouldn't mind if someone built the math part. There are a lot of examples of collaborations, in which one did the theoretical part, and another one the mathematical part.

    A theoretical treatise in modern physics would be mathematical. What this reads as; "I've made some stuff up and want someone to do all the hard work".

  5. !

    Moderator Note

    One of the rules you agreed to when you signed up is that people must be able to take part in the discussion without having to click any links. 

    Therefore, would you kindly post some details of your ideas as just posting the links is against the rules. 

  6. As someone who recruits graduate and postgraduate scientists and software engineers, I would look favourably on a mathematics background. But that's because a lot of the tasks we solve are mathematical in nature. 

    I don't think you should have much of an issue applying your skills, you may find you need to do more background reading than your peers who have a compsci background. 

  7. On 6/9/2019 at 1:13 PM, fredreload said:

    If you've ever been on a commercial airplane, the buckle sign lights up before the airplane goes through heavy wind that would drift the airplane ups and downs. And so the aircraft must have a way of predicting the wind current. I want a way to travel faster on a commercial flight, but you know you need all things in check including airplane integrity. You could have a magnetic field to filter out the air turbulence, but then you'll have to work on traveling counter to the earth's magnetic field instead of air.

    I'm not sure what you're talking about with the magnetic field. But, the pilots turn on and off the seatbelt light for turbulence based on a few things, including, other pilot reports, forecast wind conditions (i.e turbulence whilst entering or leaving a jet), forecast cat and convection and their nose weather radar. 

  8. 7 hours ago, Ken Fabian said:

    Perhaps 0ptical Rectennas (aka nantennas) could work as an alternative to air conditioning -  in theory these should be able to convert IR to electricity and remove heat from the surrounds in the process. Like old style 'crystal' radios, they should convert EMR to electricity, independent of the temperatures of the radiant source and collector- the cooling would be from energy absorbed not becoming heat in the collector and not being re-radiated in turn. These currently don't work because diodes are not fast enough and are losing too much energy through heat loss - but that is not an intrinsic property of diodes and better ones remain a possibility .

    Of the many possible technologies we have not yet succeeded at, I rate Optical Rectennas as one with a lot of potential;  they should be able to utilise bands like IR as well as visible light and be able to make use of ground heat that radiates up as well as atmospheric down radiation, ie will make power day and night. It may also have uses for energy recovery from low grade heat  and make new kinds of thermal energy storage possible.

    The problem with trying to absorb IR is that the thing you're trying to absorb it with is normally about the same temperature and is therefore also radiating IR. It makes things tricky and not very efficient. Bolometers for IR, for example, are normally actively cooled. 

  9. In entanglement (or superposition more generally) there is no information transfer. Causality is maintained. 

    It's a pretty common misconception that there is information exchange, often due to sloppy pros in popsci articles. 

  10. As to the importance of mathematics in modern science. 

    It's the language and the framework that the physical sciences are built. Repeatable predictions of physical measurements are fundemental to science, to do that accurately you need mathematics.  

    "If I let go of this ball it will drop" is not as accurate as "if I let go of this ball, given the local gravity, air resistance and distance to the floor it will hit the ground in 7 seconds". You can then measure the 7 seconds and see if, given the relavent errors, the values are consistent with each other. 

    As to the probability, even if it's very very very small, we should again refer to the great man (Douglas Adams),


    Space is big. You just won't believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.


  11. 8 hours ago, Raider5678 said:

    It's not a company devoted to software engineering, if that's what you mean.

    It's an industry based company that handles about a million and a half shipments a year to various warehouses, construction sites, etc, of various building materials and supplies. The software is mostly used in collecting basic data, and then using that data to optimize the production.

    For example, a software program that was used for recording parts that were damaged during production found that over 75% of parts being damaged on line 5 was at a single area. Upon inspection of the area, there turned out to be a rough spot on the conveyor which would scratch the part, damaging it. Stuff like that.


    Please don't take this as a negative on you. I want you to make the best (whichever that is) informed decision for you. 

    None of your answer fills me with confidence. 

    No, I didn't mean a software company. There's a distinct difference between someone who writes software and someone who is a software engineer (which would normally also include writing software). 

    What you then go on to talk isn't quality assurance in the software engineering context. 

    You wouldn't have scored highly. But that's ok at this stage, as long as you know that you're writing software rather than engineering then you can make an informed decision. 

    Given your answer a follow up might be something along the lines of "what process did you go through to decide your database schema?"

  12. I don't know much about the US system but the team I manage does include software engineers. You say you'd be working as one, do you really mean you'd be working as a software engineer or would you be doing programming for a company who don't really know what software engineering is? That could make a big difference to you when you come to get your next job. 

    A pretty simple interview question for an entry level software engineer might be something like "what importance do you place on quality assurance and what tools and practices have you employed to demonstrate this in a particular project?"

    I'd suggest you need to think about this role, it's prospects both in the company and what you might want to do career wise next, after collage. 

    You might also be interested to know that for university graduates we look at their a-levels as well (equivalent age to high school in the USA). 

  13. On 26/11/2018 at 11:59 AM, StringJunky said:

    I have an Astrolux with 3x Nichia 219c's in and I think they are 90 or so cri.  I'm not enough of a geek to notice the difference though with my Cree XPL versions other than brightness, of which the Cree's are much brighter. I think the tinting to get that level of CRI sacrifices brightness.

    Part of the reduction in brightness is due to how lumens are defined, humans are more sensitive to the bluer end of the spectrum and the scale is weighted. So the same energy coming out the front actually changes bassed on colour temperature of the light. There are other factors like the thickness and types of coatings used to on the LEDs to get a white spectrum out. They're getting better at that though (the Samsung options especially it seems). 

    I carry an astrolux S1 with an xpl hi most days. The lower cri isn't a big problem for the most part. But it might be something worth thinking about in the context of the thread. Next time I have to think about kitchen lighting I'll take it into account. I find the led lights ive got at the moment not great for cooking meat. 

  14. Warmer colour temperature (actually cooler in terms of the number, think below 5000 K) tend to give better colour rendition to the human eye. There is also some evidence that they are less straining on the eye. 

    In the torch (flashlight).community cool white (above about 6000 K) are normally met with derision. 4000 K is pretty comme and gives a good mid-afternoon mid latitudes kind of light. 

    If you're really interested in colour rendering you need to look at colour rendering index (CRI). It goes from 0 to 100 with 100 being close to sunlight colour rendering. Most decent LEDs will give you 70, it's not too hard to get up around 95. Nichia and Samsung make some good high cri LEDs. In my torches I can see a difference between 5000 K at 70 cri and at 95 cri. 


  15. In academia that's probably true. There just aren't the jobs or funding. 

    In general it's not true though. I know people who work as scientists who were certainly not the top students. Some are better at the science than others. 

    A science degree also gives you some great transferable skills. Many of my contemporaries are doing some interesting things which are often tangentially technical (e.g. finance director for the technical wing of a company, patent lawyer etc...)


    In academia that's probably true. There just aren't the jobs or funding. 

    In general it's not true though. I know people who work as scientists who were certainly not the top students. Some are better at the science than others. 

    A science degree also gives you some great transferable skills. Many of my contemporaries are doing some interesting things which are often tangentially technical (e.g. finance director for the technical wing of a company, patent lawyer etc...)


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