Unboxing Huami Amazfit

This post helps to know the features of Huami Amazfit BIP, a Smart watch from the Xiaomi Sister concern Huami. Its a perfect watch for those who do regular exercise everyday.

Features:

Easily linked with Apple and Android Phones/Tablets
Gives notifications for calls, messages, apps
display time, notifications like number of walked steps, calories burnt and km walked
so many activities from cycling, running, walking, shuttle badminton, etc.
It has DND feature, where you can disable/enable the DND (Do not Disturb) Option
It has heart rate monitor
Watch face can be changed with various images
45 days battery life (but reduced lifetime for customisation)
Gives you warning for Sitting for longer duration
and there are so many benefits.
Its cost $99 in the world market and in India it costs around 7K to 8K
App to connect: Mi Fit (iOS and Android) through bluetooth
IP68 Water proof with GPS

Technical Specifications

2.5D Corning Gorilla Glass screen
Press button to operate
Lithium-ion polymer battery thats last for 45 days in single recharge
Battery: 190mAh
Polycarbonate case material
Silicone plastic band
OS: Android,IOS
Product size (L x W x H): 19.50 x 3.50 x 0.80 cm / 7.68 x 1.38 x 0.31″
Package size (L x W x H): 5.00 x 5.00 x 5.00 cm / 1.97 x 1.97 x 1.97″
Product weight: 0.0320 kg
Package Contents 1 x Smartwatch 1 x Charging Cable

Please see the video for unboxing Huami Amazfit BIP

Huami Amazfit

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Installing TexLive 2019 in Ubuntu 18.04

Installation of TexLive 2019 in Linux (Ubuntu 18.04 LTS)
TeX (Tech)

Installation of TexLive 2019

Please watch the video for full installation

I used .iso file to download, the Total size is 3.3GB for Linux,

and i used the torrent file to download, it took me just 20 min to download the entire .iso file

Extract the .iso file to a folder and open a terminal

$] sudo ./install-tl
(it goes into a terminal mode, which is faster compared to the GUI Mode)

$] sudo ./install-tl -gui
after the installation, set the PATH, MANPATH and INFOPATH as suggested by LATEX

export PATH=$PATH:/usr/local/texlive/2019/bin/x86_64-linux
export MANPATH=/usr/local/texlive/2019/texmf-dist/doc/man
export INFOPATH=/usr/local/texlive/2019/texmf-dist/doc/info

put these lines in to the /home/pradeepkumar/.bashrc

$] gedit /home/pradeepkumar/.bashrc
We have installed TexLive 2019 and texstudio.

To install texstudio

$] sudo apt install texstudio
The look and feel of TexStudio looks like this image.

texlive, it install everyt…

Implementing a new system call in Kernel version 2.6.32

A system call is used by application or user programs to request service from the operating systems. Since the user programs does not have direct access to the kernel whereas the OS has the direct access. OS can access the hardware through system calls only.The following files has to be modified for implementing a system call/usr/src/linux-2.6.32.5/arch/x86/kernel/syscall_table_32.S/usr/src/linux-2.6.32.5/arch/x86/include/asm/unistd_32.h/usr/src/linux-2.6.32.5/include/linux/syscalls.h/usr/src/linux-2.6.32.5/MakefileNew set of files to be createdCreate a new directory newcall/ inside the path “/usr/src/linux-2.6.32.5/” Create new files Makefile, newcall.c and put them in the /usr/src/linux-2.6.32.5/newcall/ folder Create new user files (in any folder of Linux) to test the system call
testnewcall.c, testnewcall.h (created in /home/pradeepkumar) syscall_table_32.S Find the file /usr/src/linux-2.6.32.5/arch/x86/kernel/syscall_table_32.S and add the following line at the end
"…

Electrical Machine Design (equations)

FactorsDC Machine Transformers Induction Machines Synchronous MachinesOutput EquationPa=CoD2Ln, where Pa=P/h for generators, Pa=P for motorsFor Single Phase
Q=2.22 f Bm Ai Kw Aw d10-3
For Three Phase
Q=3.33 f Bm Ai Kw Aw d 10-3Q=CoD2 L ns
KVA Input Q=
HP * 0.746 / Cos f * hQ=CoD2 L ns
KVA Input Q=
HP * 0.746 / Cos f * h
For Turbo alternators
Q=1.11Bavac KwsVa2 L 10-3/nsOutput CoefficientCo=Bav ac* 10-3where Bav-magnetic loading and ac - electric loadingDNACo=11 Kws Bav ac 10-3Co=11 Kws Bav ac 10-3 Choice of Magnetic LoadingFlux Density in Teeth Frequency of Flux Reversals Size of machineDNAMagnetizing current, Flux Density, Iron lossIron loss, Stability, Voltage Rating, Parallel Operation, Transient ShortCircuit current Choice of Electric LoadingTemperature rise,
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