About gichow

Founder of http://www.gichow.com - a website providing free information about everyday foods that burn fat fast

Make diagrams for free

Plantuml Archimate diagram made with Planttext

If you don’t have the funds or inclination to pay for Vizio or Lucidchart here are a few tools for easily creating a variety of common diagrams, from flow charts to entity relationship (data structure), dependency, UML and presentation graphics. Some don’t require any drawing or layout skills whatsoever and allow you to produce clear professional looking diagrams quickly just by typing concise human readable text – no manual and time-consuming drawing, positioning, resizing, formatting and alignment of objects and connectors!

Org Chart

https://slidesgo.com/slidesgo-school/google-slides-tutorials/how-to-create-an-organizational-chart-in-google-slides

https://whimsical.com/organizational-chart-BLVgnvNgT2jxnxui5Xz2Ng

Flow chart

https://slidesgo.com/slidesgo-school/google-slides-tutorials/how-to-create-flowcharts-in-google-slides

https://whimsical.com/swimlane-diagram-NPTsYh6pkkgQ83NbcytwXy

See also Activity diagram for the equivalent in the internationally agreed UML notation.

Activity, Class, Gantt, Mindmap & more

https://www.planttext.com/

Archimate Diagram

Archimate is an internationally agreed standard, in the style of UML, that lets one describe pictorially all elements of Enterprise Architecture from motivation like drivers, goals and outcomes to business processes, data, applications, technology, strategy, capabilities, courses of action (like projects and programmes) and deliverables.

https://plantuml.com/archimate-diagram

All Plantuml diagrams can be constructed, shared and saved via

http://www.plantuml.com/plantuml

and

https://www.planttext.com

however since the URLs are so long (the URL encodes the script that describes the diagram) a URL shortener can be employed for easier sharing and embedding.

https://tinyurl.com/5d258ucc

Tip: change the real URL you land on using the shortened link above from the format

https://www.planttext.com/api/plantuml/png/{long string}

to this format

https://www.planttext.com?text={long string}

to be able to edit the diagram!

Plantuml Archimate Diagram (revised)
Plantuml Archimate Diagram (revised further)

Here is the new URL of the revised diagram, in the SVG format this time, which can be scaled without loss of resolution:

https://tinyurl.com/yck3j9ay

Note: if you change the diagram the URL of your edited diagram will also change, which means that you will need to change the diagram URL embedded in any documents that refer to it if you want them to reflect your edits. Of course, if you simply download and include the generated png file in your document you need to change the document whenever you revise the diagram too. The upside is that anyone can revise the diagram in future without having to recreate it from scratch and without needing any software – just internet access. One isn’t even dependent on a particular website since the ‘long string’ from http://www.plantuml.com/plantuml/uml will also work at https://www.planttext.com and one can even install one’s own diagram server:

https://plantuml.com/faq-install

Class and many other UML diagrams

https://plantuml.com/class-diagram

Also allows one to quickly write:  Sequence diagram  Usecase diagram  Class diagram  Object diagram  Activity diagram (here is the legacy syntaxComponent diagram  Deployment diagram  State diagram  Timing diagram 

ER Diagram

https://graphviz.org/Gallery/undirected/ER.html

Dependency Diagram

These can be very powerful by providing insight into the chain of dependencies and relationships within a system. Graphviz allows diagrams in the simple ‘dot’ graph description language to be constructed, shared and saved via e.g.

https://dreampuf.github.io/GraphvizOnline

http://magjac.com/graphviz-visual-editor/

App Wireframe

https://whimsical.com/web-app-wireframe-MQJZk63o4PSpJES2zPTXLx

Slide Presentation Graphics

https://slidesgo.com/

Icons

https://www.flaticon.com/

Other tools

https://app.diagrams.net/ (formerly draw.io, fiddly on a phone)

https://docs.google.com/drawings (needs sign up, cumbersome on a phone)

http://dia-installer.de/ (needs installation on a desktop OS so unusable on a phone)

https://www.lucidchart.com (needs sign up, app installation on phone and free version limits documents and objects per document)

Hope this helps – feel free to share your favourite diagramming tools and resources in a comment!

How many MPs are supporting Boris Johnson in today’s vote of No Confidence #HowManyMPsSupportBoris

At least 157 MPs have publicly declared their support for the Prime Minister including those listed in the tweet below.

The latest figure can be seen here: https://twitter.com/johnestevens

The list above may not include some of the latest declarations of support – you can search Twitter for “support prime minister” e.g.

If you have a more up-to-date figure feel free to tweet a reply here.

WhatsApp – react with Emoji new for 2022

If you want to show your appreciation for someone’s message or photo in a WhatsApp group chat but don’t want to bother everyone in the group with a notification of your reaction there is now a way by simply long tapping the thing you want to react to and selecting your emoji reaction.

This was a feature request raised over 6 years ago but better late than never I guess!

https://www.quora.com/Why-doesnt-WhatsApp-let-you-like-someones-message

Top Gun 2 (Maverick): Top Gun for Grown Ups

TG2: Top Gun for grown ups

Top Gun: Maverick wasn’t what I was expecting but was none the less enjoyable for that.

We know from the now 2 year old ‘making of’ trailers how much effort went into capturing the real life flying scenes but for me the visual spectacle didn’t translate to the big screen significantly more than the equivalent scenes from the original.

What did unexpectedly move me was the maturity of the story elements around the characters. Top Gun was almost a coming of age movie about internal conflicts but TG2, rather like Trainspotting 2 finds new material in the things that matter to its now older and somewhat wiser protagonists. Managing relationships in a new mindset with less bravado but more recognition and acceptance of oneself and others and knowing that sometimes we just don’t know.

Yes, the plot may be ridiculous and we can see the manipulations coming but nevertheless I found myself welling up at those moments of mass audience acknowledgement of some of life’s truths and values. Hard work, honesty, tact, camaraderie, courage, compromise, humbleness, mutual respect and understanding.

We may not know the answers but perhaps the message is that sometimes just trusting our instincts is more valuable than thinking, conveyed in the somewhat hackneyed but pithy line:

Don’t think.

Just do.

Like a son, TG2 may inherit some of its forebear’s characteristics but is an entity of its own. Enjoy the ride.

Colab Data Science cheat sheet

This is a collection of links, in various evolving categories, helping one quickly develop insights into and predictions from data.

Starting points

https://github.com/jupyter/jupyter/wiki#statistics-machine-learning-and-data-science

https://nbviewer.org/github/Tanu-N-Prabhu/Python/blob/master/Top_Python_Libraries_Used_In_Data%C2%A0Science.ipynb

Tool tutorials

Tips, trick and accelerators

Alternative tools

Fun projects

Requirements

Data Quality

https://www.ataccama.com/download/dq-analyzer

Worked Example Crib Sheets

Reduce dimensionality by either selecting the most informative features or transforming them into a low-dimensional manifold using dimensionality reduction methods e.g. PCA, LLE, etc. https://machinelearningmastery.com/feature-selection-machine-learning-python/

  • feature selection: you select a subset of the original feature set; while
  • feature extraction: you build a new set of features from the original feature set.

Predict https://towardsdatascience.com/random-forest-in-python-24d0893d51c0

https://realpython.com/linear-regression-in-python/

Everything wrong with the Samsung S95B QD-OLED TV

Samsung S95B frustrations?

This article is now available as a video!

There are a lot of glowing reviews of the latest flagship TV from Samsung, the S95B. Samsung Display’s new and much awaited QD-OLED technology brings extra brightness and colour volume to the inky blacks of regular W-OLED technology, but if you scour the TV reviewer videos, AV websites and shopper reviews you’ll find a surprising number of less than positive aspects reported too.

I’ve summarised those I’ve found so far below but leave a comment if there’s anything I’ve missed.

Starting with a thread of 15 issues based on this TV YouTuber’s findings:

I’ve lumped these problems, plus those from other sources, into a set of categories:

Physical e.g. size

Only comes in 55 and 65 inch sizes: https://www.samsung.com/uk/tvs/oled-tv/s95b-55-inch-oled-4k-smart-tv-qe55s95batxxu/

11/ Panel can be bent in shipping: https://www.amazon.com/SAMSUNG-55-Inch-Quantum-Built-QN55S95BAFXZA/product-reviews/B09VHBXY63

15/ Bright lights near the screen make blacks grayish

8/ Cleaning with water can leave spots, though this might help: https://lifehacks.stackexchange.com/questions/17639/how-to-remove-water-stains-from-tv

User Interface e.g. OS and remote

13/ Tizen OS is laggy: https://en.m.wikipedia.org/wiki/Tizen

“an uninspiring smart platform”: https://www.reviewed.com/televisions/content/samsung-s95b-oled-tv-review

Small remote with no back-light: https://www.bestbuy.com/site/reviews/samsung-55-class-s95b-oled-4k-smart-tizen-tv/6502216

Picture Processing e.g. black crush, blown highlights, colour accuracy, upscaling, motion handling, HDR modes.

9/ Out of the box, filmmaker mode is brighter than movie mode and shadow details are too dark: https://www.samsung.com/us/support/answer/ANS00079295/

10/ In some modes eotf is pushed too bright affecting mid tones

Inaccurate or oversaturated colour and luminance:

https://www.avsforum.com/threads/samsung-4k-s95b-qd-oled-owners-thread-no-price-talk.3240720/post-61604628

1/ Colour fringing with dark objects against a light background: https://en.m.wikipedia.org/wiki/Chromatic_aberration

3/ Shadow details can be crushed or overly bright: https://www.howtogeek.com/728797/what-is-black-crush-on-a-display/

4/ Dark scenes can trigger dimming (tho not the only OLED to do this)

2/ Low bit rate content shows aliasing and smoothing artefacts: https://en.m.wikipedia.org/wiki/Spatial_anti-aliasing

14/ Smooth gradation can show posterization: https://en.m.wikipedia.org/wiki/Posterization

5/ Motion can show ghost trails

12/ Motion interpolation introduces artefacts: https://en.m.wikipedia.org/wiki/Motion_interpolation

No Dolby Vision HDR mode: https://www.reviewed.com/televisions/content/samsung-s95b-oled-tv-review

Quality Control e.g. bugs

Screen cuts off the edge of images: https://www.amazon.com/SAMSUNG-55-Inch-Quantum-Built-QN55S95BAFXZA/product-reviews/B09VHBXY63

6/ Auto colour gamut and auto input switching are unreliable: https://en.m.wikipedia.org/wiki/Gamut

7/ Picture settings reset unexpectedly 

Longevity – OLED tech is based on organic materials which wear out

Brightness – QD OLEDs can get bright but are nevertheless still much less bright than some LEDs

It’s the brightest OLED we’ve tested to date but S95B doesn’t get as bright as some of the brightest LCD/LED TVs:

https://www.reviewed.com/televisions/content/samsung-s95b-oled-tv-review

Value – price to performance is not the best

Cheaper LEDs like the Sony X95K and its kin have as many strengths and come in larger screen sizes

Finally, trust your eyes – look at some footage of a real life scene and see which TV looks more realistic and involving. And if the measurements of the TV you prefer are worse than some other TV then the measurements are measuring the wrong things – things that don’t necessarily reflect our perception.

And beware the shills and bots lurking in the comments – you need look no further than those in my last video to see the kind of unsubstantiated hype they come out with!

Image credits: cottonbro

Sennheiser Momentum True Wireless 3 – Practical, popular evolution that misses a little magic

Sennheiser Momentum True Wireless 3 Sound recordings
MTW3 v CX400BT

In a nutshell, this latest evolution of Sennheiser’s Momentum True Wireless Bluetooth earphones offers an adaptive codec that should handle dropouts over distance better, improved ANC and call quality in noisy environments and more secure fit with a popular tuning that emphasises female vocals over the previous generation.

Love: sound quality is among the top tier with, by default, more forward female vocals than its predecessors which, while not to my taste, has a fresher, livelier sound that many may prefer.

Like: comfort, security of fit, the unobtrusive design that sits more flush in the ear, responsiveness of touch controls, lightness, microphone quality, water resistant IPX4 rating, long battery life, Qi charging, removing from the ear automatically pauses a track and replacing it resumes, activating transparency mode automatically pauses a track and deactivating resumes, transparency mode works well, ANC is good for an earphone (tho headphone ANC is much more effective) and does not affect EQ when switched on, the App offers good configuration of touch operation and EQ with my ideal touch configuration for volume (hold), pause (tap) and skip (double tap) by default, and there is no noticeable latency when watching videos.

Dislike: looks which are less distinctive and premium than the previous model, difficulty connecting to a 5y old Windows laptop, the charging port being at the front, the default tuning slightly emphasising upper mids with less bass rumble, single bud use only working with the right bud, there being no multipoint pairing allowing connection to and automatic switching between 2 devices at the same time like your phone and laptop, without unpairing and repairing, Sennheiser make you register to use the Sound Check custom EQ and Sound Zones location based EQ, there is some hiss at the higher levels of transparency mode, and finally value for pure sound quality, which is always my number one priority, is only fair.

I’ve characterised the review this way since a love can outweigh a dislike and vice versa, making simply totting up points in categories like sound quality, comfort, control scheme, security of fit, battery life, connectivity, etc. rather academic. In the final analysis, arguably the best buds are the ones you end up using the most.

The MTW3 maintains the solid foundation of the previous model but with a popular Harman style tuning that brings female vocals more forward in the mix. Such a tuning can emphasise female vocals at the expense of male however the MTW3 remains a good performer with both male (Peter Gabriel’s Heroes) and female (Nitin Sawhney’s Nadia) vocals being involving. They have a tight and deep but marginally less rumbly bass than their predecessor though the sub bass at 3:27 of Hans Zimmer’s “Why so serious?” still comes across as satisfying, if slightly less so than on my reference TWS earphones (that also conveys the plunging into water sounds at the beginning of Dario G’s “Voices” better). Soundstage is also slightly less wide on “Fly Me To The Moon” bringing the higher registers of Sinatra’s vocals more to the foreground.

So sound wise these are a sidestep from the previous generation, with a tuning that I find less natural but that many may prefer.

As someone who rarely uses earphone ANC, for me the new and improved features do not make up for the significant additional cost over alternatives, though admittedly these are much cheaper than the launch price of Sennheiser’s previous equivalent flagship model.

If you’re happy to forego some features like the ANC and top tier transparency, lower profile, more secure fit and auto track pause there are cheaper alternatives from the same manufacturer like the CX400BT and CX series that offer the same level of sound quality in a comfortable form factor.

Samsung S95B worth £3000? The Dark Secret reviewers won’t tell you.

This article is now available as a video!

I’ve reviewed a lot of products and focus the channel on high quality high value audio, technology and wellbeing which, in a nutshell, is bang for buck, so the entirely new level of performance the QD OLED technology of the Samsung S95B promises looks really exciting BUT you need to know there are some uncomfortable truths that almost none of the reviewers are talking about.

Now I love the almost 3d look of OLED and the Samsung S95B quantum dot or QD oled is the latest evolution of OLED technology and looks to offer the most realistic picture yet, combining the impactful brightness of LED with the black levels, depth and gaming response times of OLED.

If you’ve been through the hours of reviews from Digital Trends, HDTVTest, Stop the FOMO, Quantum TV, Tech with KG and others and managed to stay awake you’ll have heard all the excitement about what this new technology, currently only available in the Sony A95K and Samsung S95B, delivers. In a nutshell:

1) Impactful brightness conveying energy due to use of light producing quantum dots rather than regular OLED’s light absorbing coloured filters

2) High Colour volume making the picture pop due to absence of the white sub pixel in traditional WRGB OLEDs that brightens but also washes colours out

3) Perfect blacks with high contrast and depth making the picture look almost 3 dimensional and life like

4) Convincing upscaling of less than pristine content and blur free motion processing.

Digital Trends 922k

HDTVTest 422k

Stop the FOMO 117k

Quantum TV 65k

Whisper Status 74 19k

Tech With KG 15k

Keep It Classy Tech 11k

Some reviewers have gotten very excited and I’d encourage you to check them out.

But we need to get into the technology of these quantum dots. Now bear with me on the science lesson because this will become relevant to the dark truths we’ll get to in a minute, that  few reviewers have hinted at.

Colour conversion in QD-OLED displays is done by quantum dots that are placed or patterned at a sub-pixel level over Blue OLEDs.

So, we have a blue OLED emissive layer in the backplane where all pixels are blue. And then green and red quantum dot materials are printed on pixels that need to be green or red.

Just like in regular OLED however, in QD OLED organic materials are the source of the light and these materials wears out. The Blue OLED lights get dimmer with time and over the lifetime of your TV, its display will get less bright.

But this is a new tech right? Well yes its new in that no white sub pixel is employed to increase brightness at the expense of colour purity and there’s no colour filter to reduces brightness, but rather quantum dots which emit photons HOWEVER the underlying light production is still organic and will degrade over time. And there’s the rub.

Now Avforums, a respected av enthusiast website, has over 20 pages of posts on problems due to OLEDs wearing out with sets purchased as recently as Summer 2018, under 4 years ago, and furthermore warranty claims being rejected.

https://www.avforums.com/threads/help-green-spot-in-middle-of-lg-oled.2154188/

There’s even a whole video on how you can wear your TV out just by watching normal content and I don’t mean screen burn or image retention by having static images frequently on screen. Many people, including me, relate to the problem and there are several comments against this video describing their experiences 

Now while the panel will get dimmer over time, that of itself is no big deal since especially with QD oled it was much brighter than traditional OLED panels to begin with, BUT if some areas of the screen typically use certain colours more than others like pink faces in the middle of the screen from news and chat show programs then those areas are going to have pixels that are more worn out potentially causing a colour shift in those areas.

Ah but there’s compensation nowadays I hear you say with pixel shifter and pixel refreshers and screen savers. Well yes, but if you have a patch of red say and shift one red pixel with the red pixel next to it you’ll still have a red pixel being shown and then the only way to compensate is to burn out all the other leds to the same extent making the whole display dimmer each time.

And different rates of wear by different colours, for example with human pink faces typically centre screen can cause those portions of the screen to show a colour cast which is an unpleasant green tinge exactly where faces, which as humans we’re very sensitive to, typically appear. I’ve got another video on how to mitigate the problem, one I experienced myself on a 3 year old Panasonic OLED (tx55hz980b), to make the picture more watchable but it’s a workaround and introduces a wholesale colour shift of the picture so is far from ideal.

And did I mention the price.

Now clearly the QD OLED picture more or less successfully combines the impactful brightness of lcds with the blacks, depth and almost 3d realism of oleds. But the price is double that of competing mini LED, Full Array Local Dimming and OLED TVs so unless you buy into the 100% better view there’s no way it can reasonably be considered worth double the cost of some other still great looking televisions, especially when you consider things like the user experience of the TV operating system, sound quality and picture processing.

So to summarise the S95B may well be a fantastic looking set but bear in mind that 

  1. Depending on the content you watch and for how long, because of the technology used and nature of typical TV content, the screen may wear out in such a way that the picture becomes noticeably degraded with jarring patchy colour casts within 4 years so make sure you get a warranty against this – or are rich enough to consider your expensive tv disposable
  2. At double the price of some lesser but still great looking alternatives there may be a new king in QD OLED but for now at least value isn’t its strong suit.

Is the Sennheiser Momentum True Wireless 3 worth it? What the £$€¥!

Sennheiser TW3 – worth the money?

This article is now available as a video

I’ve written the most helpful Amazon UK reviews for some of the latest and most premium Bluetooth earphones including Apple AirPods 3, Sony WF-1000XM4 and Samsung Galaxy Buds Pro but as a recognised Amazon vine reviewer Sennheiser hasn’t offered me their most highly anticipated wireless earphones in years, the Momentum True Wireless 3 for review. Now why? 

Well I focus the channel on high quality high value audio, technology and wellbeing which in a nutshell is bang for buck or sound per pound in the case of audio and the TW3 is retailing at well over £200.

Now don’t get me wrong. I love my Sennheiser cx400bt and its very natural sound. I rotate it with my ipx4 rated Sony wf-xb700 which has a more artificial V-shaped but exciting and spacious sound with deep bass and forward female vocals and between them I have everything I personally need for sound quality and practicality in Bluetooth wireless earphones.

Let’s do a quick review of the specs of the new Sennheiser momentum.

In a nutshell it offers a fancy high res codec, longer battery life, more secure fit, improved ANC and better call quality in noisy environments.

Now I suspect the codec will make no to little noticeable difference to sound quality and much less of a difference than basics like tuning and amplifier components.

The longer battery life is great since there have been times when I’ve wanted more than the 4 hours my cx400bt offers however if that means they’ve gone for weaker magnets and a lower current amplifier that doesn’t push and pull the driver so strongly then we’ll lose that wonderfully realistic sound of the cx400 and it will be a sound quality downgrade.

Now fit is one area where the TW3 may be a step up on the TW2, especially if you wear them while exercising however fit alone is not enough since the IP rating would also have to improve to make them practical to deal with sweat and rain. And sealing sound producing components typically adversely affects sound quality so is that a trade off a hifi audio manufacturer would want to make?

And of course we’ll expect the ANC to be world class, both the noise cancelling and transparency but none of the clever triggering features of the Samsung or Sony are mentioned where transparency starts if you or someone else starts talking for example.

And while the microphone quality may improve in noisy environments the previous generation wasn’t exactly poor.

Now I don’t use earphone ANC and unless there’s some very significant difference from the cx400 I can’t imagine the TW3 being worth over twice the price – even if you have no other wireless buds and the full package of capabilities just happens to marry up with your particular use case.

Now one area where, perhaps with the change of owner to Sonova, Sennheiser has been a bit slow is pre release to the influencers and sponsored deals, something that brands like Anker are world class at. If that means more of the purchase price goes into the product then I’m all for that though it’s a balancing act and if they don’t sell enough units consumers won’t benefit from economies of scale. The reputation of Sennheiser may be enough to carry them this time.

Well, whatever the case, mine is ordered with my own money and arriving later this month so subscribe if you want to see whether any of these predictions prove true when I post my recording of how they sound.

Thanks as always for reading!

Ukraine Kyiv Live Stream Webcams

Ukraine Kiev webcam livestreams

A collection of webcams streaming video live from Ukraine. Click play on each of the video thumbnails below in turn to watch them simultaneously. Some have live chat and audio.

Livestream Events
WacMilk
The Valkyrie
TVL Trzcianka

Previous streams: Think Unboxing, DW News, Chiosphotos.gr, Discordia, Batu Yollarda, Politischios.gr, Inquizex

https://www.stopwar.org.uk/

If you find another stream please leave a WordPress comment below and I’ll try to add it to this page. Like, share and retweet.