All posts by Per Lindholm

Idea – Digital Offline Education ( Student Created Videos )

I have written before that you can use a smartphone for recording your own educational videos. Be it theory presentations, exercises, assignments or tests.

If you are doing a course or are planning on educating yourself I really suggest you start recording. The process of recording video is a very good motivator.

You want it to look good enough or as perfect as you can. This means you will redo the presentation several times. This process then makes you learn from looking, writing and speech.

Maybe in the future you can communicate with teachers in this way. From exchanging videos. Say you want to get into this particular school. Maybe a portfolio of videos could help.

In refugee situations maybe the student can create a weeks amount of videos on the smartphone. Then when Internet access is available they could be uploaded to a university for grading and feedback.

Using youtube reduce the size of the video on the smartphone. I got it down to 30MB for 6 min HD video.

Using handbrake and the h.265 encoder (software) on Linux I reduced a similar youtube compressed video at 17.1MB to 3.5 MB for 3:22 minutes. So about 1MB per minute. However this h.265 video were not viewable in the browser. However VLC (stand alone video viewer) worked fine.

screenshot 3:22 min video at 3.5MB
HandBrake settings. Using h.265 just for testing purposes.

Idea – Would It Be Possible To Stream Games From An Internet Server To The Mobile And Lastly To The TV?

The idea is simple in theory but I don’t know in reality. However the potential is good.

The idea is to stream games from Internet Servers to the TV with the mobile as a go between.

You buy the streaming ready game on the android phone and use it to stream it to any TV you like. Provided it has a chromecast or the like.

Even if a game requires 8GB of RAM. Streaming should not take anything like such requirements. The limiting factor should be if you have enough bandwidth and latency for the resolution.

Idea – Student Created Video Screencasts In MOOC’s

For online Linux courses or MOOC’s I wonder if you can take advantage of screencasting software to make the training more effective and fun.

For training purposes I suggest that there should be projects which include the student making their own screencasts of selected assignments.

With enough guidance like a manuscript which has some blank fields they could fill in. They could create this video screencast and explain some related topics in it.


It doesn’t need to be screencasts. With a simple smartphone and a flexible holder you could start to record selected topics from mathematics, physics and so on. I belive you learn a lot with this method. So why not take your math book and make a collection of videos.



Idea – Should There Not Exist Dumb Phones With Voice Calls Over Wifi?

The idea is simple and could be a huge success. Why are the dumb phones not fitted with WiFi. It does not have be that fast however you should be able to make voice calls over the Internet with it.

With WiFi also on the dumb phone. People who would benefit the most. People who don’t have that much money could use this below 20$ dumbphone for calls to their relatives in other countries.

I’ve seen feature phones with WiFi but they cost as much as smartphones. The biggest impact should be if you fit dumbphones with WiFi.

I think its a right to be able to stay in touch and up to date with your family.

Also Internet access needs a Internet ready device. Then Wi-Fi on the dumbphone makes a lot of sense.

Software Idea – Machine Learning App To Adapt And Render PDF’s On Mobiles?

The idea is simple. Or at least I think this idea could make a difference. If we want people to use their phone for perhaps reading and improving their skills in mathematics for instance. Then the release format for the Open Source Textbooks need to be more mobile friendly.

One way this could be done is if the Open Source Textbooks are released in an adaptable screen size HTML version. Besides residing on the web you can convert these HTML books to apps using some web to app software. Then they would become accessible offline.

Since a lot of books would still be in PDF version. I wonder if the PDF reader could adapt and render the text to fit the mobile screen. One way this could work is if the software recognizes the text area of interest after pressing on the text and reshapes it to be mobile friendly for zooming. The difference is that you would only need to scroll up and down. Not also sideways which makes the experience not very pleasant.

Software Idea – Machine Learning App To Adapt And Render PDF’s On Mobiles?

Idea – How Do You Compress Random Pixels In An Image?

How do you compress random data? My idea is that you don’t compress. You can recognize parts of the image that is looking random and replace it with similar random data but from a random number generator. This will however hopefully reduce the storage size.

It will be a lossy compression. But since its still looks like random you will not be able to tell the difference.

Maybe one can call it random image blindness. That is. If you percive an equal quality between a sampled part and the generated part you are blind to the difference.

Idea – Dual Screen Mode Youtube – Separated Static Images + Video

My idea is so very simple. Why should we simulate one screen TV’s? Let the content creator manage two windows on youtube or other video sites. One with static images and the old original video window.

With a dual window setup the viewer can watch the video without having to click away those irretating in window popups.

This will make it a lot more effective for ads. Here the viewer do not need to click away the ads.

For educational or other purposes a dual window setup can make it easier for the viewer to remember important information. Also a synced slide functionality for the static window might prove useful.

Idea – Dual Screen Mode Youtube – Separated Static Images + Video

Idea – Could WhatsApp Be Used For Education In Refugee Situations?

When in collage I sometimes communicated by phone with my dad for difficult assignments. First we used a fax machine for sending the problems. Then later we replaced it by email and a flatbed scanner. Today all this could be done using a simple smartphone and a software like WhatsApp.

So the idea is to use a smartphone to send images of exercises or theory to a teacher group. Who then respond by voice, textchat or maybe documents.

What if the teacher groups are international? Learning English could then be a major advantage. Exercises could be sent both ways. By request from the students or the teachers.

If there are not enough teachers availible for this or the cost will be to high. Maybe one can consider using older students. Who then after an exam get the qualifications. Here the student does not need to know everything. The questions from the learners are seperated to each teacher student based on their qualifications anyway.

So the teacher student might only need to know how to explain a number of exercises. I think this might be enough for some learners to get these over WhatsApp and then be able to ask questions.

If this works then maybe it could be an idea to sponsor an ”Education Basic” service for the telephone companies.

Education Basic would then be a free service sponsored internationally. Also maybe such a service could build upon my previous idea of an globally accesible international curriculum.

With a free service the students would not hesitate to use it for something so important as their education.


Why Linux – Innovative Installation

I don’t think it is all that well known. Although Linux distros install very quickly I like the liveCD flavors. One reason besides checking that the hardware is compatible is the possibility to browse during the install.

You simply don’t waste any time looking at an animated icon. Maybe its a tip for windows also. Let the user multitask during updates and installs.

Why Linux – Innovative Installation – Browse while installing A Linux Distro from a LiveCD

Speculation – Is There A Second Law Of Conservation Of Energy Due To Teleportation?

Energy can neither be created nor destroyed; rather, it transforms from one form to another.

As an imagination exercise I will try to extend this law.

From this law I wonder what happens if you can teleport away energy very far distances. The further away you can teleport energy the closer you are to sort of breaking the conservation law. It gets lost rather than being destroyed. But maybe thats equally bad.

To prevent energy being lost I wonder if there is a function or limit that takes affect for the distance.

My Idea For Personal Cooling

When I googled personal cooling I got the strange looking cooling vests. I think I got a much easier idea.

I simply took a USB deskfan and connected it to a powerbank. With this I got a descent airflow and a very long battery time.

The fan was 10cm in diameter and rated at 2.5W.

I could easily run this fan for more than 4 hours. Together with a low noise profile and long battery time this idea has some interesting uses.

Be sure not use it near water or in the rain.

My Idea For Personal Cooling. Tired feet 🙂

Idea – Take Advantage Of The Smartphone In School

The idea is simple. With a flexible holder you can begin to take advantage of the smartphone by filming your own pen and paper exercises.

By doing so you will create a positive feedback loop. When you later redo the filmed presentation a second time after reviewing.

I believe this will also help your memory after some time when reviewing. Simply because your own created video has more connected information then a static paper.

Just store the videos locally on your computer/phone/tablet.

Idea – Black Hole As An Energy Filter?

If the black hole can be viewed as a filter for energy. Only emitting some kind of radiation? Then I wonder. Could there be another universe body that is “trimmed” to absorb this energy released by the black holes. Maybe this universe body (like a trimmed solar panel) can be view as a seed for a new universe.

Idea – Walking Your Dog With A Larger Water Bottle And A Bowl

With these elevated temperatures I try to always carry a water bottle. Now my dog who died of cancer. Had a thick curly black coat. Heat waves would have been tough on him. So I thought. If he had lived now I would have carried with me at least a 1.5 litre water bottle and a bowl. Of cause I didn’t walk the dog during the hot part of the day either. Always keeping water for the dog seems like a good idea anyway.


Idea – Is Fish Involved In Sea Floor Recovery?

A guess of mine is that life doesn’t try to destroy its living surroundings. If the contrary were true life would not survive very long any way. So from this I formulate a simple exaggerated guess.

All life trough evolution tries to improve its living surroundings. This then would mean that fish is important for the sea floor as the sea floor is important for the fish.

In this case there should be research into how different fish can take part in the recovery of the sea floor.

Idea – Is Fish Involved In Sea Floor Recovery?

Idea – Take Advantage Of Two (Wifi Cast Dongle?) Projectors For Your Presentation

The idea is simple. Why not use two projectors for your presentation instead of one. With two you can let the audience view an important image page on one projector while you progress the presentation on the other.

I have not tested but it should be easier to handle the two projectors with an app on the smartphone/tablet and a WiFi dongle like the Google chromecast connected to each projector.

Idea – Climate Resilience Measures And Possible Income For Municipalities?

The idea is simple. I believe we need to think about ways to mitigate future dramatic rises of energy prices. Be it fuel or electricity.

Since higher energy prices will not only affect private households. I wonder if our cities and municipalities could build flood and fire safe micro grids for important facilities.

With enough energy they could then perhaps start to sell electricity to the public. For fast car charging and more. Maybe this can be done without surplus energy from the sun. More electric charging places is important.

Idea – The Smart Educational Flower Pot

The idea is to educate yourself by doing instead of just reading. With an educational pot which monitors the plant health, soil and water content. You can begin to teach yourself how to manage your flowers.

The idea is that this smart pot sends information to your mobile and scores your handling of the plant. Somewhat like in games. I believe this can quickly improve your plant handling. At least I hope so. My handling so far has failed for too many types of flowers.

The idea is that once you have mastered the pot challenge for a number of different types of plants you can then handle the ordinary pots with ease.

So instead of a robotic grow machine. The problem could be that we need an inspiring fun hands on way to learn. Maybe this could be adapted for food production also. Learn how to grow food with a educational smart raised vegetables bed.

Idea – The Smart Educational Flower Pot

Guess – Enhance Athmospheric Water Harvesting In A Volume Of Higher Air Pressure?

I’ve seen small air to water harvesters using peltier elements. Here they let the water in the air condense on the cold side. Since a bicycle pump gets warm when you compress the air. I wonder. Would you not get a higher efficiency if you tried to cool this warmer air. Also since the volume is smaller maybe its easier to extract water from it once its colder.

So the idea is to have a air compression water extraction cycle. Air is compressed to a container then water is extracted then the air is let out. After that the cycle repeats with new fresh compressed air coming in.

Looking at some peltier cooling experiments I noticed that the thickness side of the ceramic peltier plate was hot. Maybe there is some efficiency gains one can do if this heat is diverted away from this small but hot side.

Idea – Engine Stove?

To start with I was thinking. Why should we burn gas directly for cooking? To me. We are wasting a lot of work energy potential.

So the idea is simple. Some of that energy in the gas could be used for mechanical work. Then there could exist an engine  enhanced gas stove that takes energy from the air with the mechanical work potential.

Maybe a piston engine connected to a turbocharger or compressor could work. The idea is that this would be more efficient than a direct contact between the cook ware and the burning gas.

So here I believe there is a potential for a new invention. A more efficient and safer? gas stove. The engine enhanced gas stove.

Come to think of it. Because of carbon monoxide an electric stove/oven is most definetly the prefered option. Instead of the usual gas powered stove.

Then why not a corresponding Electric stove. An engine enhanced electric stove/oven with a high Cofficient of Performance that uses hot air maybe.

So the reason is to make electric kitchen stove much cheaper to operate.

Idea – #hashtag With Price Information For Product Images Found In Search Engines?

The idea is simple. Finding a good price for a product can take a long time even using the Internet. So I wonder if one could include a #hashtag with the price information for product images. Then our popular search engines could optionally include that in an updatable price text together with the image.

So with this idea you could google prices for many products. Then if you like the product then you could turn on the price information directly from the search engine.

I wonder if the alt attribute in HTML image tag could be used for this. Just add #Price 123 USD. If not then maybe this information could be accesible to the search engine from somewhere else.