Repairing Faulty Push Button in a PC Mouse

 24 July 2020

The left button of the mouse was not working. To fix the mouse, one would have to open up the mouse, cleaning the push button contact which might have bad electrical contact after years of usage. This video tells how to clean the contact.

To Reduce the Fan Noise in the PC Power Supply Unit

23 July 2020

Some power supply unit for the PCs have very noisy fans. The good one will come with a thermo controlled fan; the cheaper ones usually have this omitted especially when they are made for Bit-Coin mining machines. The solution is either to change the fan or have a fan speed controllers installed. This video describe how best to carry these works.
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 Update:

The circuit in the video used IRF 634 which has a rated voltage of about 500V.  A cheaper euivalent is IRF 744 rated at 250 V.   The components are listed as shown

The veroboard layout of the component and its connection is as shown below

 

Do not Touch Any Power or Lamp Pole when Wondering in Flood Waters

20 July 2020

Floods are everywhere during this raining season.   They are in Japan,  India, China,  Indonesia,  Malaysia and many other parts of the ASIA.  In Japan, we have Typhoons.  In China and South East Asia,  we have the Monsoons and in India,  we have the heavy rain.   Some floods are not actually caused by heavy rain. Breakdowns in embankment of rivers and dams are often the cause in large area floods.

It is unfortunate to learn people died in floods. Some drowned; others electrocuted by high voltage electricity. Although lesser people died this year as compared to previous years. One thing we can help is by educating people to kick the habit of holding or touching the power or lamp poles in a flood.

This video was prepared using incidents happening in China recently.  It tried to explain why it is dangerous to hold on or touch any power or lamp poles when wondering in flood water.   Traffic poles are also dangerous in a flood.

 

 

New MiTV model

According to a Chinese article, ZNDS,   Xiaomi China has actually  registered with the local authority 5 models of MiTV5 in Feb/Mar 2019 including a 65" MiTV5.  They are namely

1.  MiTV 5A  65"
2.  MiTV 5S  45"
3.  MiTV 5A 55"
4.  MiTV 5S 55"
5.  MiTV 5S  43"


The details of the registration are as followed:

Hopefully,  Xiaomi will introduce the Global version of 65" MiTV5 to satisfy those  user who are looking  for larger sized MiTV.

Where is the Origin of this CoronaVirus Outbreak?

 21 March 2020

Let Science Do the Talking

There is a lot of talking about where this present coronavirus has originated.  Some said from Wuhan,  China;  others claimed that it was from USA.  Some even mentioned about Taiwan.    In between and among the countries,  they blamed each other for spreading the diseases.   The Politicians,  the netizens,  the commoners all have their says,  bringing up all sort of evidences to prove that they are right

When will this end?

This sort of argument will never end.  The argument will still continue  until the day when there is a common understanding among all of us  and what that might be,  you might ask.   The Science.

The Experts are Talking?

So far,  all the argument has one thing in common.  It started with “according to the experts”.   In many of the arguments,  not many mentioned about the names of experts.  even if  experts’ name were quoted,   the argument will not rest. 

What could Stop these Arguments? 

The argument will stop when everyone has the consensus and agreed to concentrate the effort to find the source.  This will never be easy and may not be possible if the this coronavirus is man-made and not from natural sources like bats or pangolin.   In this case,  there might be a possibility to use RNA technology to locate this source. 

What is RNA Technology?

In layman's term,  it is much like the DNA technology.   It is a tool used to study the gene or the genome of a organism or living cells. Unlike DNA that ,  RNA technology

How? 

Every virus will have a set of genome sequence as defined by RNA techology

Who is GISAID?

GISAID is nonprofit organisation with HeadQuarter in Munich of Germany.   It serves to share information about global health, research and education with databases that can be assessed free by people all over the World.  
Its primary purposes is provide a platform where the World can share all influenza virus sequences, related clinical and epidemiological data etc to help global researchers doing researches on  viruses.

GISAID presently has more than 350 genome sequences to be shared on their platform. 

The shutting down of the Bio Research Lab in America could only further reinforce the believe that the country has put in place a proper control and management system to handle these laboratories and to prevent them from causing a pandemic.

The only Bio Research Lab that can guarantee 100% safe is a Bio Lab that never do any research on biological work or has been closed down. Even when there is "leak" or mishap, there must be protocols and procedures to handle these happenings to stop them from causing a outbreak. It is still safe.

Argument about who is responsible for this coronavirus outbreak basing on this kind of argument will go no where. It will alwys ended with everyone scolding each other an "idiot". it is just a waste of time..

Why don't we let Science do the talking. We have DNA and RNA technologies, quite sure they will be able to tell us sooner the source of this outbreak.

If you like you can look at this chart presented by GISAID . It uses Genome sequences and arrange the virus to form trees that can trace the source and the origin. The chart has all the information about the gene and the kind of mutations happening. Enlarge into full screen and explore. GISAID is a non-profit organisation stationed in Munich, Germany. It has more than 350 genome sequence free to share to all people of the World.

https://www.gisaid.org/epiflu-applicatio...ov-19-app/

You can also view this video that illustrate how other use the same Genome sequences to map and anlayse the development of virus infection. The web address is shown at the bottom of the video

https://youtu.be/rPQFC05TzOI (Part 1)

https://youtu.be/-ATEq7NeI-M (Part 2)

How Reliable Are Those Figures about Coronavirus in China?

When US coronavirus figures went above the Chinese figures, Trump said "You don't know what the corona numbers are in China". This video tries to find out. 

 

The reference website are: 

1. Chinese health figure for the month of Dec 2019 

 http://www.nhc.gov.cn/jkj/s7923/20200...  (alternative page)

 

2. https://www.reuters.com/article/us-he... 

 

3. https://www.globaltimes.cn/content/11...  (alternative page) 

Home Made Sanitizer Why & How Explained.

The Wuhan virus or Coronavirus (COVID-19) has caused every store to run
out of hand sanitizers. Besides using hand sanitizers to disinfect
shoes, door knobs etc is rather wasteful. The alternative of home made
sanitizers using Isopropyl Alcohol is a cost effective solution.

Please note that virus is not a living thing but it will remain
activated ready to infect any living cell. Disinfectants can only
inactivate virus so that it will lost that infection ability. This is as
good as “killing them"

Can RNA Technology Tells the Origin of the Coronavirus?

Can RNA Technology Tells the Origin of the Coronavirus? Part 1

Some Scientists made attempts to analyse the genome sequences of the coronaviruses supplied by the laboratories all the World.  They produced a comprehensive chart to monitor whereabout are these viruses from.  They claimed it has the ability to tell who is the parent and who is the child of the viruses.

Here is the 2nd Part

RNA技术能否说明冠状病毒的起源？ 第1部分

一些科学家试图分析全世界实验室提供的冠状病毒的基因组序列。 他们制作了一张全面的图表来监视这些病毒的来源。 他们声称它具有分辨出谁是病毒的父母，谁是病毒的孩子.

这是第二部分

CGTN Editor in Chief: CoronaVirus Could be from USA

SARs Cov2 coronavirus Could Have come from USA