Publishing papers

This question is a real evergreen and seems really hard to answer (it is hard). I typically say: aim high in quality, do not overdo it in quantity, and do not waste anything by not publishing it. I am lying sick in a hotel room in Austria and I am bored. So, I decided to explore my own citations from the last 7 years.

Here is what I did: I listed all peer-reviewed publications where I am a co-author, and noted for each paper: number of current citations, year of publication, kind of paper (workshop/poster/demo/phd forum; small conference / small journal; top conference / top journal; book chapter; technical report or Arxiv), off-site (journals, TR, etc.) or on-site (workshop, conference, demo, etc.) whether this was a cooperative effort from outside my group, and whether it was a survey or not. I first calculated the number of citations per year to normalise for time. Then, I calculated the correlation factors between each of the factors described above and the number of citations per year.

Here is what came out. First, the correlation is clearly positive for top conferences / top journals (0.3) and even more for surveys (0.5). There is also a positive correlation between cooperative efforts and citations per year. For the other factors, the correlation factors are towards zero or even negative. What does this mean? It actually confirms what I also said before, but now it is scientifically founded 🙂

  1. Focus on top conferences and top journals. It takes some more time to go through the review rounds, the review process takes time, and you might need to re-submit several times before finding a good “home” for your paper. But it is worth it; keep going and do not give up! You might also need to work on your scientific writing, on your experiments and methods.
  2. A survey is a great way to start your publication record and publish results from literature studies. Do it!
  3. Do cooperate with people outside the lab. This is a proven method to increase your visibility, your network and your citation record. This lies simply in the fact that such papers have more authors from more labs, and all these people will take care that the paper is cited and propagated.
  4. Posters/demos/small conferences are a great way to present your work, get feedback and increase your network. Here, the focus is NOT on citations. However, growing your network and discussing your ongoing work is VERY important, not only for young researchers.
  5. Now, I need to cope with the results from non-top journals. It seems like those are not really citation runners. However, some universities require their PhD candidates to have at least X papers in journals, which is not easy to achieve in the short time with top journals. Thus, you can try to diversify: one-two top journals and the rest in conferences and non-top journals. If this requirement is not important for you, then focus on top journals and top conferences only (but you can submit also demos / posters to those top conferences, the network and the colleagues are important, not how long the paper is!)

I hope this helps somehow to build a proper publication strategy. In the beginning, focus on a survey and posters / demos /workshops / conferences to get feedback asap. Then, go for top journal publications. This will require also some time and task management. Think about how to schedule your work. You should identify several bigger tasks (2-3) you need to address for your PhD. Then, you should focus on the first and follow the publication strategy above. Once the work is in the review loop, start with the second task, and so on. They need to overlap while you are waiting for reviews and juggling with different papers in different (top) journals. Good luck!

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How to write an article

I get this question all the time – Prof, how should I start? Prof, how do I write an article?

Well, the short answer is: simply start writing it, word by word, sentence by sentence. Ok, I know, it is not that simple 🙂

There are many ways of writing and it depends greatly also on the writing process which your supervisor has set in place (I do assume here that most readers are beginning Ph.D. students. If you are a postdoc and you still do not know how to write articles – well, you are in big trouble…). I personally like to be mid-involved in writing articles. I almost never contribute real text or graphs to the articles of my students, but I do give detailed comments early on. This is the process in my group, which seems to work quite nicely:

  1. Define a table of contents. Do not limit yourself to section titles, but put 1-2 sentences in each section to say what you plan to put there. Be as concrete as possible. For example:

    “Section 4: Experimental results.
    4.1. Experimental setup
    Put here the complete description of our setup, incl. hardware, software, and a picture of the hardware.
    4.2. Metrics
    List and explain our metrics – throughput, delay, energy consumption.
    4.3. Results
    Here they come. Probably 3 graphs, one for each metric. Discuss each of them in detail.
    4.4. Discussion
    Go back to our motivation and overall problem statement, discuss whether we solved the problem and which disadvantages and open issues we see.”

    See, the point is to plan everything in great detail. If instead you simply say: “Section 4: Experimental results.”, your supervisor cannot judge whether this is enough or you are missing something important. For example, I could now complain that the metrics are too few or wrong, or more graphs are needed.

  2. Start writing the individual sections down. Make a first complete draft of the complete manuscript, before giving it back to your supervisor for comments. However, it often happens that while you are writing, you realize you miss something in your overall structure or that the structure needs to change. Explain the issue to your supervisor, make a suggestion of how to handle it, and discuss it. But do not send the non-ready manuscript! This could only lead to confusion and misunderstandings because you did not check it yet.
  3. Now you have a draft. What is a draft? It is not a ready paper – some individual graphs can be still missing (for a good reason only! For example, waiting for the experiment to finish), and there might be grammar errors or formatting errors. However, try to do your best in terms of wording and explanations. Give your supervisor enough time to read it carefully and to give you feedback. If you only give her 6 hours before your meeting, she will be angry and/or have not read your paper at all. Enough time means several days.
  4. Your supervisor will have comments, some of them deep-going. She might suggest even new experiments, new sections, new structures. You can mostly prevent this with a well-prepared and detailed table of contents (see point 1). But you can never fully prevent it and you must be open to these suggestions. You can openly discuss problems connected with such changes – how much more time you would need, how to implement the changes, etc. But try not to take the position: “I do not want to do any more work, this is enough!” This would not be very good-researcher-like 🙂
  5. Once you agree on the contents of the paper, it is time to polish: check the grammar, check the references for completeness, check the format, check that all acronyms have been introduced properly, etc.

That’s it. I guess the most critical question is now: “But can I submit also smaller parts to my supervisor to comment on, just to make sure that I am heading in the right direction?”. This is a tough question. Of course, you can try, and your supervisor will always give you feedback – but how useful will it be really? Unready chunks of text tend to be isolated from important context, to have bad wording, and to lack necessary details. The comments will be like “Use a spell-checker”, “Work this out”, or “I do not understand this part”.

It would be better to train your writing skills before you start your first paper. If you do not feel confident in your writing skills, agree with your supervisor on a plan: you could write small summaries of papers, you could write short proposals about experiments, etc. Keep those short (1-2 pages) and always do your best before submitting them to your supervisor.

In fact, I really enjoy writing myself (this blog is a proof of this!). I always see it as THE opportunity to describe what great research we have done, to present it nicely and in an understandable way, to “show off”. I like fine-tuning graphs and figures and text. This is my representation to the outside world. I need to be proud of it. I never see this as a waste of time but as part of the process. Try to adopt this attitude and it will make writing much easier and even fun!

Happy writing!

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Everybody needs time to think

In recent years, I observe a very dangerous development in research and university communities. Researchers are expected to be constantly doing something – writing proposals, answering emails, teaching, supervising, writing papers, making experiments, and so on, and so forth. But when should we actually think thoroughly about what we do? When should we think about problems encountered? When and from where should we get inspiration?

As researchers, we regularly need “ideal times” – time to simply think about everything, read a good book, talk to friends and colleagues with an agenda. When I do not have time for this for, let’s say, a week, I not only get nervous, but also start making more mistakes, forgetting important things, and losing connections. It is not really tiredness, my brain simply needs some time to order stuff, to think alternatives through, plan and observe.

I always urge my PhD students to identify time for this, but also to think about where and how. For me, the best way of getting my brain into this valuable “order and plan” mode is to hike or at least to go for an extended walk, alone. The worst I can do is to stay home, close to the computer 🙂

What is it for you?

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Manage your tasks, not time

This post is highly inspired by the book of Tim Ferriss “The 4-hour Workweek”. I find the title a little misleading, but the ideas do work also for academics.

So let us start straight away. Let us assume you need to work on your paper. No, you must! Let us also imagine that you would like to work for 2 hours on it. There are two ways you could plan for it:

  1. I will work today 2 hours on my paper.
  2. I will write today the related works section.

Oh, I already hear you screaming: I cannot possibly write a complete section in 2 hours! Tim Ferriss says you can, and I confirm.

The first plan has a glitch: you could spend the complete two hours shuffling your references and playing with the format. Is this what you wanted? Is this what you want to report to your supervisor? I don’t think so. In fact, one of my Ph.D. students once confessed to me, that sitting in front of the computer already “feels” like work, so he would try to spend as much time as possible in front of it, staring at the simulation running … What a terrible way to fool yourself and to waste your youth!

The second plan has a huge advantage against the first one: it pushes you to quickly do and FINISH something. You only have two hours and you need to get this done. Thus, you stop shuffling references and playing with the format, but finally get back to the pile of printed papers on your desk and write that section down.

Now, we have to discuss another problem: The references probably do not compile and the format is broken! But this was also not the task. The task was to write it down. Another task, maybe for tomorrow when you only have 30 minutes, could be to fix those.

In general, I advise all my students to work in cycles. I also live this advice myself. I would start writing raw drafts with bullet points and copied paragraphs, then turn them into first drafts, then polish and sharpen the writing, and finally spell-checking the text.

Take-home messages:

  • Define clear, concrete, doable goals. Do’s: finish section 2, fix all references, make graphs 12 and 13, polish the writing.
  • Prioritize your tasks: polishing, formatting, spell checking are done at the end. Writing and presenting results are your first priorities.
  • Learn to work in cycles: write the first draft, re-write later, polish, and spell-check at the end. This also applies to result presentation: make a hand-written graph first to check your hypotheses, create the graph later, play with colors and text size last.
  • Define one or two clear tasks for the day, depending on the time available. Challenge yourself a little bit every day!

Happy task management and paper writing!

P.S. Oh, I forgot the good news: if you finish your task earlier than expected, get a coffee and enjoy your free time!

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Energy Management

Time management is popular and I have already written about it. However, even with the perfect tools and concepts, there are times when you sit in front of your work and you simply do not have the energy to do it. And then there are times when you are full of energy and manage much more than expected. Sounds familiar? It is surely one of my problems ..

The theory is simple: identify your energy levels and the energy needed to accomplish tasks. In practice, it is not that easy. Here is my try:

Tasks, which drain my energy: administrative meetings and work, email, homework and exam corrections. Those are really tasks, which do not only tire me, but drain me.

Tasks, which I truly enjoy: teaching and giving talks, discussions with students and colleagues about research, writing papers (yes, I am one of those weird people), writing research proposals (unless it is already the fifth time I am resubmitting it), doing research, reading and watching inspiring papers and talks, learning something new. I tried to summarize those here:

Task Energy needed to accomplish Energy drain Energy building
Low Middle High
Administrative meetings x x
Email and admin work x x
Homework and exam corrections x x
Teaching and giving talks x x   x
Conferences and workshops x x
Research discussions x   x
Writing papers x   x
Research proposals x   x
Research x   x
Learning something new x x   x

Energy levels: very high at the beginning of the week and during the mornings. Highly dependent on progress and on good news. This part is nasty because I cannot control it. So, I need to develop strategies how to build up my energy when bad news is coming in.

First, I decided to focus on my high-energy tasks, which also built up my energy during the mornings. What to do with the tasks, which require high energy, but completely drain me, like homework corrections? Some people advise to bulk such tasks together and to work on them only on some days. This does not work for me – I prefer “hiding” them. If I have 30 homework assignments to grade, I could easily spend a complete day on those and will be completely broken and annoyed at the end. I will be terrible company. But if I do one or two corrections every day between other tasks, my energy levels seem to overlook them :-). However, I will be ready in 5-6 days, which needs to be planned properly.

Tasks that do not need that much energy, like research discussions, I prefer scheduling in the afternoon or towards the end of the week. Even if I feel tired, I enjoy those tasks and I can easily motivate myself to address them.

Sometimes, I need to replenish my energy. I do sports and I do learn something new – I am practicing languages with my favorite learning apps (Duolingo and especially Memrise), I watch TED videos and I read books. I must admit, I read also a lot of time management and self-optimisation books!

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Time Management Principles

I have been experimenting with time management for almost 10 years now. Early in my career as a researcher, I noticed that if you manage to focus well, you can get extremely productive and will need only a fraction of the time planned. However, achieving productivity is not trivial: there is no button on the back of your head to switch it on, unfortunately.

In this post, I would like to share the pure basics, which work well for me for many years now. You have heard many of them already, but I am sure you still do not “live” them, for one reason or another.

  1. Switch off media when you want to focus. Put your phone in the next room, switch off email and all messaging apps. You probably know these. But did you think also about calendar notifications, Dropbox und Google Drive updates, etc? All these disrupt your flow and any disruption, even just for a second, brings you off your real work. In general, I am very conservative which apps can send me notifications and I generally switch them all off. If I know that a meeting is upcoming and I am afraid to miss it because I am so deeply involved in my work, I set an alarm.
  2. Allow emails to “ripe”. You do not have to answer each and any email that comes and surely not immediately. It is better to wait for at least several hours. This also means that you do not have to check on emails constantly, you can do so during waiting times (e.g. when a meeting has finished earlier). I really hate emails – once you answer one, an avalanche of further emails come upon you.
  3. Observe yourself and identify the most productive times. For me, these are the mornings, between 9am and 12pm, approximately. Block these slots for your most important work. Do not waste them for meetings, emails, etc.
  4. Do not overbook your time. You want to work 8 hours per day? Then schedule at most 6. You need the remaining two for breaks, switching tasks, checking emails and   buying coffee in the cafeteria.
  5. Make a (virtual) office hour. Each time somebody asks you for a meeting, it costs you 3-4 minutes to check your calendar and to answer to that person. Especially with students and admin stuff, it is really useful to have a fixed office hour. I switch on my Zoom personal meeting and can check emails and do some other small and quick tasks while I am waiting for people to come. I find this extremely useful and efficient – people know when they can surely find me and talk to me and I know that I usually manage to put some todos off my list. Plus, people tend to be more constructive in your office hour, since they assume others are waiting.
  6. Organise your todos. It is not enough to keep a list of todos, since these lists tend to grow very long. What works better for me is to organise into sub-lists, which I can grab one by one and work myself down. For example, I have a list for paper writing, a list for teaching and students, a list for admin stuff, etc. The items which have a deadline, get a deadline. I am not a fan of putting deadlines to items which do not have any. For some reason, I always end up not meeting those (because I know they are not real and I cannot fool myself), but I still feel bad about it. What is worse, however, I cannot visually and quickly differentiate between real and non-real deadlines and I end up messing it all up. Thus, only real deadlines are marked. I use Trello for this.
  7. Reserve time for important tasks. Some tasks, like meetings and email checking, have the incredible talent of eating all your time, if you allow them to do so. If I go to all meetings I have been invited to and I answer all emails immediately, I would end up with almost no time for real work (like papers, and research, and teaching, and supervision – they are not few!) Thus, I started reserving floating slots for time eaters. I would decide how much time I need to invest in them, e.g. 15 hours per week for meetings (wow, so much!). Then, once I schedule a meeting, one of these floating slots disappear from your calendar. Once they are all gone, it is over – first come, first serve. This has taught me also to say no to meetings which I think will not   serve my priorities, so that I have meeting slots available for more important stuff. This principle, together with step 3 works well for me to keep control over my time.

I hope these could be useful also for others! Happy time optimising!

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How to start publishing papers

Beginning PhD students are often desperate about this question: how to START publishing? Many universities pose very strict requirements on their students and want to see the first publication in the first year. This is not easy. Here are some possible strategies:

  • Write a survey. If you already know in which field you are working and what your approximate topic is, target a survey. A good survey is a real “cash-cow” – it will bring you most of your citations. Example: According to Google Scholar, I have published by now 144 papers in total and I have 2055 citations (Feb 2021). From these citations, 967 are to be accounted to only three survey papers!
  • Reproduce and extend a state of the art work. If you find a really good paper (a recent one), which is going exactly into your direction, consider re-producing it. This means that you try to re-do all the experiments the authors have done. You will learn a lot and you will get into the real depth of the topic. You can usually publish even those results already. However, what is really nice is that usually you get ideas on the way of how to improve the work – and this can be the basis of a really solid first piece of research. Don’t forget: the extension has to be substantial.
  • If you already have some preliminary results, use publication venues like poster and demo sessions, PhD forum, workshops, etc. Make sure those are associated with top conferences in your field. Do not get fooled with low-quality conferences – you will not get proper feedback and you will not meet the top people. Focus on A rank conferences (e.g. check here:
  • Ask your supervisor to team you up with somebody more experienced, working in the same field. You can learn a lot and if you also contribute to their work with your ideas or coding skills, you will be included in their publications.

These strategies will help you in the beginning, especially so that you are not that scared of publishing any more. Later on, you have to learn how to craft really good research and describe it in top publications.

If you really hate writing papers, you should probably consider another job, honestly. Research is about doing research, but also writing about it.

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How to publish more papers

Publish or perish: this is the dogma of today’s research. So, how to maximise your publication output? This depends mostly on your career level, so let us focus here first on master and PhD students, who are most desperate for publications.

Some students adopt really questionable strategies: publish the same work under different names; chop your work into smaller pieces; add tiny incremental stuff to your work; etc. This is not a good strategy, as it produces (in the best case) un-interesting works, which nobody reads or cites. Don’t forget: now you are desperate for publications, but tomorrow you will be hunting citations. So prepare for the next step too.

A good strategy follows three different paths:

  1. Align what you are doing to what can be published, not the other way around. I often see this problem: a student works on something, without taking care about how to publish it later and then she wonders why she cannot find a publication venue or so mich additional work is needed to get to a publishable state. Thus, before you start doing something, ask yourself where and what you will be able to publish. You always need to offer innovation!
  2. Make the extra work also publishable. Often you produce a lot of secondary material,  like source code, datasets, etc. Make sure those also get published in repositories (data and code) or specialised publishers. Those will not necessary contribute to your “official” publication record, but will your work more prominent in the community, people will remember your name and THEN they will also start reading and citing your work…
  3. Help others. Usually people do not ask you simply “Would you like to write this paper together?”. At least not when you are still a student. However, you can watch out for opportunities. At conferences, at workshops or at group research meetings, you can listen carefully to the problems of other people and offer your help. Very often the result of this is a joint paper. Your interest and offer to help should be genuine, otherwise people will never repeat the experience with you.

And, last but not least: Publishing papers means writing papers. Practice it as much as you can: write, write, write…

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Can I submit a paper to my own journal special issue?

I am currently serving as a guest editor for a special issue at MDPI. Some of my students got really excited: Can we submit something there? I am not really sure why they think this is a good idea and in fact, some people do this. However, my simple answer is: No.  It is not a good idea. First of all, if the journal and /or publisher are sensible, they will require a completely independent review process for your papers. They will need to find another editor for this job. At the same time, if it gets published, that process is not visible any more and people might think: Oh, how unprofessional is that, publishing in your own SI!

Remember, your scientific reputation is all you have. Do not put it on risk just to get another paper on your list.

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Wish post: how to make presentations

A student asked me recently how to prepare good presentations, “as in your lectures!”. Beside being really touched by the fact that she liked my presentations, in fact I do have some tips, which I acquired over time.

  • You need to address two different senses of your audience. Assuming a typical slide-based presentation, this would be hearing and seeing. Your audience listens to what you are saying and they see what you have on your slides. However, the problem is when the slide is full of text. Psychological studies have shown that reading text and hearing text is processed by the same area in the brain. This means that you double occupy this region when you offer text on your slides. Think of your own experience: When  I see text on a slide, I try to read it, but this occupies my full attention and I stop listening. So, you need always to make sure that the audience is not currently occupied with reading when you explain something.

Look at the following two slides – which one is nicer to look at?

However, now it becomes crucial what you say. With the first slide (the text one), you can say anything you want, since the audience is not listening at all and struggle to read your text. With the second one, you need to explain everything on the picture. Best, you introduce the individual items (the nodes, the sink, the wireless links, application) one by one with an animation. Note the arrows and the definitions, they are important!

  • Identify the goal of your presentation! Is it to show new results? Is it to teach something? These two need completely different approaches (maybe I will write about those in the near future…). I general, when teaching, you would use much more text for the people to have a reference later. However, in the best of all worlds you would have a proper presentation for class and handouts/scripts for home and reference. With research results (also from student projects!) you would focus on numbers and important definitions (e.g. a legend).
  • Sometimes you need to present difficult stuff: a complex equation or graph. Make sure to present it step by step, for example like in this slide:

Here, I have used an animation, which shows each line separately, so that I have time to explain it. Especially when it comes to the complex equation at the bottom, I go slowly one spot at a time and give intuition behind what is going on. Do not rely on laser pointers for this! They shake when you are nervous, they are not well seen and people do not know what are you showing them.

You should use the same trick with animations, arrows and spotlights also to present graphs – show the people what exactly they should look at.

  • Build a story. A presentation is not a historical overview and does not have to follow the sections of your research paper. You should also focus on some of your results, not all. You can build the story also visually, see this slide:The colourful legend at the top is not only part of the title of this slide, but also tells the audience where we are in the story. Some people also do this with a normal table of contents. In this slide, you can also see how text can work – you simply need to introduce the bullet points one by one and to have them short.
  • Focus your text on what is really important, do not waste the reading time of your audience with full sentences, conclusions, etc. At the same time, make sure that all important stuff, like mathematical definitions, colours used for coding something, axes on the graph, etc, are always clear. You can easily do this by offering a small legend at each slide.

I would really like to hear from you! Let me know whether you found this useful and what tricks do you have!

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