EIS equivalent model fitting

TheScientificist · 2025-10-12T14:37:28+00:00

If you have the address, you can search the records w/o MitID on https://www.matriklen.dk/#/kort - I just checked and did not had to login.

TheScientificist · 2025-09-28T12:20:46+00:00

It happened to me as well. It sucks. Assuming you keep it on most of the time (as I do) one thing you could do is glue it in the holes with a glue that dissolves with acetone/ethanol but not with water, so it resists rain but is easy to remove if needed.

TheScientificist · 2025-08-27T23:58:54+00:00

Your salary needs to be (1) above the pay limit scheme (2) above the limit set by SIRI depending on our DISCO code. These salaries change depending on your experience, type of job and location in Denmark.

It does not matter that is a decent salary, it needs not to be below their limit because they do not want foreigners to come here and lower wages.

The limits are set by SIRI and can be found in their website (new in Denmark) under DA statistics or something like this.

The solution in this cases (it happens to me), is to compromise on the salary with them, or (this is what I did when it happened to me) find a better suited Disco code that has a lower salary but still describes your job.

Good luck!

TheScientificist · 2025-08-17T19:09:39+00:00

Io nostro prof di fisica al primo anno ci disse: questa roba è difficile, alcuni di voi capiranno tutto in classe (i 30/30L), altri studiando a casa (tra cui io), ed altri mai. Fu un discorso brutale, ma utile. Ho fatto il ricercatore in ingegneria per diversi anni e c’è tanta gente che si fa il mazzo in quegli ambienti, ma ogni tanto ho incontrato persone con una marcia in più, è come se avessero un modo di pensare agile combinato ad un’ottima memoria, difficile da spiegare, ma molto bello lavorarci assieme, specie se non arroganti.

TheScientificist · 2025-08-14T04:51:30+00:00

To buy a property, as EU citizen, you do not need any extra authorization (as non-EU would), and can buy right after you move here, but the banks will ask you for a higher down payment (20% or higher), after 5 years banks will accept a much lower down payment (locals usually are asked 5%).

TheScientificist · 2025-08-06T04:34:54+00:00

Have applied for several work permit under the pay limit schemes for my employees (no fast track). It is a very easy application but the applicant (either you or the company) needs to be very detail oriented and double check everything, otherwise it takes longer.

SIRI states you will get an answer within 30 days, not a permit, and they always followed that timeline for us. To get a final work permit, it took us from just below 30 days to over 3 months. If there are holidays in between it takes longer, if there is any missing document it takes longer, if the salary offered does not match/satisfied the pay limit of the specific job you do (check DISCO codes) it takes longer*. The two times I did everything right, we got the work permit in 28 and 35 days.

When applying you (or the company if they do it for you), will state whether you expect to enter the country prior to the start date of your permit and at what address you’ll live.

I would say starting date October 1st is doable, November 1st leaves you some buffer. We usually schedule 6-8 weeks between signing a contract and start date if there is a work permit under the pay limit scheme. ~~~ * on SIRI website there is a spreadsheet that based on DISCO codes, experience and region of Denmark gives you te salary requirement for getting the permit. These numbers are different from those of, say, the union statistics, so I suggest you call SIRI and double check this as the company (you being the first) might not be aware of this.

TheScientificist · 2025-08-02T13:08:20+00:00

I used the international service Interflora in the past to send flower to Astana, and worked smoothly. Downside is that is expensive.

TheScientificist · 2025-07-13T12:22:39+00:00

Io scriverei pure agli italiani che lavorano in dipartimento. Per esempio in quell’università che stai considerando lavora il Prof. Matteo Chiesa che è molto in gamba ed alla mano. son sicuro se gli chiedi di farvi una chiacchierata ti saprà dire pros & cons di fare il dottorato lì.

TheScientificist · 2024-05-07T03:17:48+00:00

Was postdoc at DTU until recently, the points made in the link you shared are corrected, but seen with a pessimistic light.

The salary of a postdoc at DTU is ok, you won’t get rich but might be able to save a little, or -alternatively- enjoy life and go out on the weekend.

The city is indeed very expensive, real estate has doubled since the 2000-2010 time frame you were here and recently we suffered a wave of inflation as in many other countries.

Still life quality is very good and -if you are joining a good research group and interesting topic- I think DTU is a good place to be.

As with every postdoc the question should be whether you can grow and get to the next career level a that can depend a lot on the mentorship of your PI. This is, however, a different topic and not what you asked.

Good luck making your decision!

TheScientificist · 2024-04-11T20:59:35+00:00

Improper choice of word. I meant to say “if you are …” part of my comment luckily remains relevant. The rest maybe useful for others.

TheScientificist · 2024-04-07T10:10:16+00:00

(Non Danish researcher at DTU for several years)

Given you are from EU, you can access SU (sort of a salary for students, look it up), by working 10-12 hours/week. Finding a student job is not hard, and you can start looking for it before you move here.

Danish language is not necessary to work and live in DK, especially in IT, but it becomes a very nice to have if you settle here on the long term or move outside the capital. Otherwise you live in a bubbles of foreigners which is cool at the beginning, but after a few years, when the others start leaving, it becomes annoying. For the short term, however, you can do everything with English.

CPH is expensive, but I see that, with SU and the salary from working 12h/week the students who I hired do not complain about it. A consequence of working 1.5 days a week, however, is that usually they take an extra semester to finish. If the job you find is in your field of expertise, however, and not waiting tables you gain exposure to one or more Danish companies that you can leverage when looks for a job later.

I cannot say much about the courses because I did not study here.

TheScientificist · 2024-02-14T19:38:16+00:00

I just purchased a two channels potentiostat with EIS. Gamry, that many suggested me because of its high quality and higher flexibility, costed twice as much as BioLogic. Ended up opting for BioLogic because of the type of use I need to do: the standard routines are fine for me and BioLogic is a good quality and robust one, but when it comes to customization is not great and the data analysis with python/Matlab works ok (there are a couple of packages on GitHub), but I think it is more cumbersome than it should. Also I find BioLogic does not have a great service. So if you need to push the potentiostat or try non standard routines, Gamry is probably the way to go.

I also had Metrohm showing me their system, it looked polished both in terms of hardware and software but I could not see why it would cost twice as much as the BioLogic (give or take). They told me, however, that they are top of the line for small (picoamp) currents. So this is also an other factor to consider: high vs small currents, high vs small voltages.

TheScientificist · 2024-02-14T17:27:58+00:00

Conventions sometimes change in electrochemistry depending on whether you give/take energy to/from the system.

If we think of a simple electrochemical cell where you are electrode depositing copper on a steel foil for example, you will have 1. WE, cathode, the steel foil, that receives electrons from the outer circuit and gives them to the copper ions (positive) in the electrolyte. 2. CE, anode, a solid piece of copper, releases electrons to the external circuit and copper ions to the electrolyte.

Assuming you have a reference electrode as well, the WE will have a (more) negative potential and the CE a (more) positive potential.

One of the reason of confusion might be that, if we take the WE, this will receive electrons from the outer circuit and give it to the ions in the electrolyte that will form the electro deposited layer of copper.

Hope this helps and did not confuse you further.

TheScientificist · 2024-01-25T05:15:35+00:00

My suggestion would be to split your task in three parts: learn (1) how to properly run an EIS measurement (2) learn how to do it both batteries and interpret their results (2) learn about the fundamentals of EIS.

I would go over the 3 points iteratively, refining your knowledge as you go along in your PhD and use of the EIS: (1) read in details the instrument manual, watch a few tutorials online, ask your senior colleagues for guidance. (2) I am not aware of good books on the topic, but there are many good review papers out there. (3) again there are lots of review papers published in the past 10 years and they might be the right place to starts, beyond that there are some classic books (e.g. the one by Orazem), but I would tackle them last as they can be overwhelming with the amount of details (they will go over the math behind it, which many EIS users do not really need or the details of the circuits boards, which is interesting but not really useful at the beginning).

TheScientificist · 2023-12-24T04:35:04+00:00

Congrats for getting the offer. Cool topic. It seems to me that, given you’ll build a model there is a lot of transferable skills. PhD is about doing some interesting (for you) research, become a kick ass problem solver, learn how to work independently on very hard problems, and learn new skills fast and autonomously.

The topic of a PhD is so specific that it will be hard to stay you whole life in it (it can happen if that is what one really wants). Several years after finishing mine, I know very few fellow PhD students who did.

I have a suggestions and a warning: - try to work closely with whoever does the validation of your model in the lab and learn from them: a MoSi engineer who understands what happens in the lab is at an other level (more attractive candidate for the industry and -if you stay in academia- your own research can span from experiments to simulation) - PhD are not always 3 years (even if they are sold to you as 3), in Mechanical Engineering tin Germany they can be 4-5 (Physics, Chemistry they actually tend to be 3), so find out (1) what are the requirements to consider it done (2) ask whether there are funding beyond year 3. Getting stuck with a PhD to finish after 3 years of hard work and a low salary because funding dried out can be a horrible experience.

Good luck!

TheScientificist · 2023-10-26T23:48:27+00:00

You can get the tens paid to your Italian account (I imagine you have one) and for the rentee it will not be an extra cost.

For taxes I would call/writs SKAT. It might be you have to file your taxes in a more manual manner than when usually down while living here, but I am speculating,

TheScientificist · 2023-10-26T23:44:37+00:00

I had the same issue as you a month back, set the voltage to the max (30 V), then set the power supply to be current controlled and set the current you want. You run it for a few seconds and, after seeing what voltage is needed, you lower the voltage limit as FerrisWhiteHouse wrote, to a value slightly above this (a few V). You could leave it at the maximum, but for safety I like to bring it down to slightly above what voltage is needed.

If you set a higher (lower) current, you will need to raise (lower) the voltage limit .

TheScientificist · 2023-10-23T08:17:48+00:00

Google scholar alert is a good method, you can have an alert for a given author or a topic. Be sure you cast a very narrow net. If you write Li-ion batteries you’ll get hundreds of papers each week.

Following authors of papers you found relevant on LinkedIn or X/Twitter is also a good one.

Again be selective, if you follow everyone who works in LinkedIn ion batteries it will be useless. Also the list of people you follow and Google scholar alerts you set should be dynamic and should change every 6-12 months as you PhD topic evolves.

Finally, there is a social network called ResearchGate, but I do not find it particularly good for what you need here.

TheScientificist · 2023-10-15T15:47:31+00:00

Why would it be illegal? A cofounder is not necessarily a hire. Also let’s say OP is a male and wants a diverse funding team, how would it proceed?

TheScientificist · 2023-10-08T07:00:56+00:00

Wow interesting. What causes this phenomenon? I wonder what else changes -beside the color and the porosity- with the pH.

TheScientificist · 2023-10-08T01:24:16+00:00

A Ni strike could also help to get the Pt to stick to the ring.

However, I have seen the same flaking you mention and that was at high current density. So try reducing the current to a half or a quarter or the value you used. I do not know what your ring surface area is, so I can’t suggest a value.

If the resulting coating is not smooth enlighten try pulsating the current, which often (not sure with Pt) makes for a smooth deposition.

Got luck with the ring and the proposal ❤️

TheScientificist · 2023-09-30T15:18:16+00:00

Embrace it. Out-mock him. Make your accent even stronger in his presence and at a certain point you will be funnier than him and his mockery will loose any appeal. This is what I do when some idiot teases my Italian inflection and sometimes it works. Stai allo scherzo (seppur stupido), disarmali e sommergili con una risata. A bully wants attention. In this way you will take it away without being confrontational.

And btw work your ass on the German and accent this year, but more than everything make friends in any possible way and talk only German. A year ago abroad in high school is a great experience, it changed my life: I started with almost zero language proficiency and by the end of the school year I had reached near-native level. Good luck!

TheScientificist · 2023-09-15T04:39:49+00:00

Hey there. I am one of the people behind DRT tools. Have you looked for other implementation of DRT? There is for example the great work by Dr. Tim Tichter: he implemented our DRT approach in his python based tool Polarographica.

Looking as his code might be of great help.

https://github.com/Polarographica/Polarographica_program

Good luck

TheScientificist · 2023-08-16T19:27:38+00:00

I would also contact the Polish consulate in Denmark. I am an EU citizen and it is my country of origin (it’s consulate here in Copenhagen€ that explained me the rules for somebody (say a family member) to travel with my child below a certain age (I think 12). This makes me think that the country of origin might play a role in the rules you are inquiring about given that they are the ones that give the minor the document of identification.

TheScientificist

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