The Notes - public

2017-06-14_data_extinction_event_investigation_report

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

2017-06-14 Data Extinction Event Investigation Report Introduction My laptop's home partition uses Btrfs alongside with Snapper. Snapper creates periodic volume snapshots, which I used for backup. It was very suitable for the prevention of accidental file deletion. However, I recently put some bulky files (8x ~2GB) on my home partition. Somehow this led to occasional 100% CPU usage for one of the Btrfs-related processes. I decided to clear my volume snapshots to avoid 100% CPU usage.

a_brief_history_of_mouth_pipetting

anonymous@undisclosed.example.com (Anonymous) — Tue, 23 Jul 2019 21:30:51 +0000

A Brief History of Mouth Pipetting By Helen Lamb, UC Davis This was originally from a Facebook group called Open Memeing Frame. * 1806 - French chemist and inventor Francois Descroizilles invents the first graduated glass pipette, which he calls the “alcalimetre.” No detail on how liquid was drawn into the device. (

accessing_ip_restricted_website_seamlessly_with_phproxy_and_switcheroo_redirector

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Accessing IP restricted website seamlessly with PHProxy and Switcheroo Redirector As some of you may have noticed, I am doing a PhD in a certain university. Rather surprisingly, I can't access one of the e-journal website that is related to my field. Fortunately, I am an alumnus of another university. Due to the fact that I joined a certain society in that university, I have shell-access to one of the machines on that university's network. That machine also provides PHP-enabled web-hosting.

ascii_memes

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

ASCII Memes Item 1 1051541451431641621571721571511441234567881234567812345678123678326470547 2999999259923478990124999995689902993413269916749953349999914649932724997 2994567809912568990139956799809929936781467998299634699818991169966144990 2999994569970124995699801323459999012615302799995324993243699019923412993 2994567801993569980299356780239999456725634569974326992644399243992369936 2994567801992689901239967899029939945745315319931253399436998011992349950 29980123452999993883529999910399539…

backing_up_dokuwiki

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Backing up DokuWiki This is how I backup my DokuWiki: * backup-dokuwiki.sh #!/bin/bash name=$GOOGLE_DRIVE_DIRECTORY/$(date -Is).tar.xz sudo tar cJf ${name} /var/lib/dokuwiki drive push -no-prompt ${name} rm -rf ${name} Add the following into crontab:

blinking_keyboard_backlight_under_linux

anonymous@undisclosed.example.com (Anonymous) — Wed, 09 Jan 2019 13:01:37 +0000

Blinking keyboard backlight under Linux Well, I own a Thinkpad T440p, so unfortunately I don't have a Thinklight. I recently put a backlit keyboard into the machine, then I realised that I don't really need the keyboard backlight. I thought the best way to put it into good use is to get it to blink when certain things happen.

bra_fitting_app_for_women

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Bra fitting app for women Idea came from VPIF summer school on Rvtugu bs Whyl, Gjragl Fvkgrra, which was held at Crzoebxr College, Bksbeq. * Girls complained that it took forever for them to find the right pair of bras. * There seems to be physiological reason behind bras - Fnenu said that she hadn't wear bras for three years, but she noticed that walking up the stairs hurts her back, so she started wearing them again.

btrfs_snapshot_size

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

BTRFS snapshot size * First you need to enable quota sudo btrfs quota enable /home * You need to wait for BTRFS so scan the filesystem for quota usage, then sudo btrfs qgroup show /home * You get output which looks like this: qgroupid rfer excl -------- ---- ---- 0/5 142.21GiB 89.70MiB 0/410 96.00KiB 96.00KiB 0/2191 17.62GiB 0.00B 0/3237 137.90GiB 4.05GiB

bumping_into_sir_tony_hoare_on_the_day_before_i_learnt_quicksort

anonymous@undisclosed.example.com (Anonymous) — Fri, 28 Dec 2018 01:55:17 +0000

Bumping into Sir Tony Hoare the day before I learnt quicksort When I was a first year computer science undergraduate at University of York, I bumped into Sir Tony Hoare at the bus stop outside Ron Cooke Hub in Heslington East campus the day before I learnt quicksort.

calculating_the_size_of_a_set_by_observing_the_proportionality_change_of_its_disjoint_subsets

anonymous@undisclosed.example.com (Anonymous) — Wed, 17 Apr 2019 02:08:12 +0000

Calculating the size of a set by observing the proportionality change of its disjoint subsets Background Instagram provides a polling feature, which allows the user to ask a question with two answers to the audiences. Once an audience pick one of the two answers, the percentage of users who pick each answer is displayed. $A$$a_1, a_2, ..., a_n$$A$$|A|$$A$$\frac{|a_1|}{|A|}, \frac{|a_2|}{|A|}, ... \frac{|a_n|}{|A|}$$n$$a_1$$A$$a_1$$n$$a_1$$a_1$$\alpha_1$$\alpha_1 = \frac{|a_1|}{|A|}$$a_1$$\delt…

celebrating_international_women_s_day_2018

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Celebrating International Women's Day 2018 In School of Computing Science Board meeting, the Acting Equality and Diversity Officer Dr Sarah Taylor suggested that everyone put a picture of a famous female computer scientist on their door, with a bit of writings on what she did.

characterising_the_latency_of_in-flight_internet

anonymous@undisclosed.example.com (Anonymous) — Thu, 20 Dec 2018 13:37:16 +0000

Characterising the latency of in-flight Internet I flew on one of China Southern's A330-300 from either Guangzhou to Amsterdam. They have free in-flight Internet services. I tried pinging my server over VPN. Data collected Here are the data collected:

colin_powell_on_leadership

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Colin Powell on Leadership * It ain't as bad as you think. * Get mad, then get over it. * Avoid having your ego so close to your position that when your position falls, your ego goes with it. * It can be done. * Be careful what you choose. You may get it.

cool_stories

anonymous@undisclosed.example.com (Anonymous) — Mon, 02 Oct 2023 21:53:50 +0000

Cool Stories This page describes all the Cool Stories I have - they are the cool ideas that I have no time to implement. The idea is that when people read these ideas, they would say “Cool story, bro”. Projects that haven't got started * OOBM on the cheap *

create_a_wifi_hotspot_which_tunnels_all_the_traffic_elsewhere

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Create a Wifi hotspot which tunnels all the traffic elsewhere Wouldn't it be great if your traffic gets tunneled elsewhere as soon as you connect to the Wifi network? This is better than configuring VPN on individual devices, as you only need to configure one device. Data leak is also less likely to happen. I have managed to make Google think that I am in Poland. $->$$->$$->$$->$$->$$->$

cryptsetup_quick_guide

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Cryptsetup Quick Guide Creation of a LUKS volume cryptsetup luksFormat ${DEVICE_PATH} Mounting of a LUKS volume cryptsetup luksOpen ${DEVICE_ID} ${MOUNT_POINT_NAME} --key-file ${OPTIONAL_KEY_FILE} Unmounting of a LUKS volume cryptsetup luksClose ${VOLUME_NAME}

curated_copypastas

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Curated copypastas Welcome to the darkest and dankest corner of the Internet! On Sexuality Having sex with a pussy is the gayest act I can imagine. Straight men are not very manly. If you were really manly you would not allow your penis to be swallowed by a pussy. That is very submissive. Having sex with a pussy is the gayest act I can imagine. A real manly man would be all man all the time and only fuck and be friends with men. You would only allow your penis to touch other penises and you…

data_over_voice_over_gsm

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Data Over Voice Over GSM Background Information I would like to build a out-of-band management (OOBM) module that does not require Internet connection. This is because I have a remote server deployed in a hostile network environment which is hard to access. The server contains sensitive information. It also requires specialist knowledge to operate. It is not feasible to train a local operator to fix problems, when they occur.

disable_cursor_animation_in_office_2013

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Disable cursor animation in Office 2013/2016 Microsoft decided to animate the cursor in Office 2013. The end result is that you feel your cursor doesn't blink while you are typing. This is mainly because your cursor moves across the screen smoothly as you type. It looks really weird to me…

docker_quick_how-to

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Docker Quick How-to Well, I use Debian. A lot of things use Ubuntu. For the sake of laziness, I decided to use Docker to run an Ubuntu image. Originally, I installed docker to run Pokemon Go bots. Basic commands * List running docker processes

does_anyone_have_calcium_hydroxide

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Does anyone have calcium hydroxide? I found an unused gas cartridge near where I live about a week or two ago. Today, I found an empty/used one at the same spot again. So my question is, what's inside that cartridge? This kind of cartridge is commonly used to store nitrous oxide or carbon dioxide. Nitrous oxide cartridge is commonly used as a whipping agent for whipped cream, because nitrous oxide is soluble in fat. Carbon dioxide cartridge is commonly used by cyclists who have too much money.

donald_trump_poster

anonymous@undisclosed.example.com (Anonymous) — Tue, 09 Apr 2019 19:25:03 +0000

Donald Trump Poster Do you feel the imposter syndrome? Do you feel that your academic writing is not good enough? Look no further. This is your cure. Print this off, and stick it on your wall: [Donald Trump Poster]. And yes, of course I made it in Latex. Source code

downloading_graduation_videos_from_uea_in_2019

anonymous@undisclosed.example.com (Anonymous) — Sun, 17 Jul 2022 23:18:33 +0000

Downloading Graduation Ceremony Videos for University of East Anglia in 2019 This is a rather amusing story of my successful attempt at downloading graduation videos from a University of East Anglia. I have to say it has been a rather educational experience.

e-peening

anonymous@undisclosed.example.com (Anonymous) — Mon, 31 Aug 2020 02:12:36 +0000

E-peening Please refer to Urban Dictionary for the definition for e-peening. It is an important process in establishing social hierachy. Procedure for CPU e-peening Linux kernel compilation git clone --depth 1 https://github.com/torvalds/linux cd linux make x86_64_defconfig time make -j$(nproc) bzImage

ed_balls_talk

anonymous@undisclosed.example.com (Anonymous) — Sun, 27 Jan 2019 21:51:42 +0000

Ed Balls' Talk Ed Balls came to UEA to give a talk on 17th of May 2017. There was a book signing session afterwards. Of course I had my book signed. Overall he's a lovely person. It makes me miss the New Labour. I know I moaned about them a lot while they were in power, but they really weren't that bad. The New Labour was brought down by a series of small mistakes (selling off the Gold Reserve), and a few big mistakes (Iraq War). Anyway, these are my three favourite stories from Ed Balls.

email_related_notes

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Email Related Notes Exim4 Spam Filter Configuration This is the local spam filter configuration for Exim4. This server is using mbox, the following set up should move spam mails into a separate folder. * Follow this guide: * Replace the relevant segment with these:

environmental_sensor_data_on_the_flight_between_amsterdam_and_beijing

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Environmental sensor data on the flight between Beijing and Amsterdam (After landing, GMT +8:00) 20.12.2016 07:40:56 Pressure : 1024.45 hPa Altitude : -93 m (Everything else was in GMT +1:00) 20.12.2016 00:28:00 Pressure : 1030.67 hPa Altitude : -144 m 19.12.2016 23:26:04 Pressure : 869.77 hPa Altitude : 1270 m 19.12.2016 23:24:03 x : -0.51 m/s² y : 0.14 m/s² z : 11.03 m/s² 19.12.2016 23:23:46 x : -0.44 m/s² y : -0.18 m/s² z : 8.21 m/s² 19.12.2016 20:09:57 Pressure : 822.18 hPa Altitude …

falling_for_christmas_review

anonymous@undisclosed.example.com (Anonymous) — Mon, 26 Dec 2022 03:24:48 +0000

Falling for Christmas Review Overall this is a pretty trashy film.

favourite_quotes

anonymous@undisclosed.example.com (Anonymous) — Mon, 26 Jul 2021 09:14:58 +0000

Favourite Quotes “” “” “” “--” ... “”

ffmpeg-based_interval_timer_for_sport_and_exercise

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

FFmpeg-based Interval Timer for Sport and Exercise I am the one of the cycling captain of UEA Triathlon Club for the academic year of 2017-2018. I always find it hard to keep track of the set in a turbo session for some reason. I used to use a Matlab-based countdown timer

flashing_olimex_stm32-h103_using_a_raspberry_pi

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Flashing Olimex STM32-H103 using a Raspberry Pi If you want to flash an Olimex STM32-H103, you don't actually need an expensive JTAG cable. The expensive JTAG cable was suggested by GNUK's README . Well, I decided to buy a STM32-H103 to store my OpenPGP master key, using GNUK. This is possibly the cheapest option to obtain a OpenPGP smartcard. STM32-H103 is available on Amazon for £14

friend_vs_acquaintance

anonymous@undisclosed.example.com (Anonymous) — Tue, 22 May 2018 09:14:08 +0000

To the people who can't tell the difference between a friend and an acquaintance: A friend is someone you: * Share important moments with, whether positive or negative. * Share personal stuff with that goes beyond the superficial (e.g. what are their views on the current political system? what are their deepest fears? do they even like who they are right now?)

frozen_2

anonymous@undisclosed.example.com (Anonymous) — Sat, 21 Dec 2019 11:17:41 +0000

Frozen 2 Review Here are some of my thoughts on Frozen 2. I feel Frozen 2 is an allegory about indigenous land right disputes, environmentalism and democracy. The dam which King Runeard built is said to have anger the four spirits dam. I believe the four elemental spirits are a metaphor of the nature. The building of the dam caused changes to the local microclimate. It is likely that the Enchanted Forest is quite up north, so it is quite cold. There is a lot of geothermal activities in the re…

getting_get_iplayer_running_on_srcf

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Aug 2018 21:59:30 +0000

Running get_iplayer on SRCF Well, if you are here, congratulations - you are one of the elite of elites - you have to be a member of University of Cambridge, and you happen to have SRCF membership. This is a privilege that not many people have - a lot of people have gone through Cambridge without knowing SRCF.

gfw_resistant_tunneling_tool

anonymous@undisclosed.example.com (Anonymous) — Mon, 31 Dec 2018 03:34:24 +0000

GFW resistant tunneling tools These projects require detailed knowledge of network programming. Protocol-imitating tool * Wrap your tunnel protocol behind HTTP request. HTTP request seems to go faster. Multithread tunneling tool * De-multiplexing a VPN connection

how_parkrun_volunteers_sort_barcodes_-_a_computer_scientist_s_perspective

anonymous@undisclosed.example.com (Anonymous) — Fri, 28 Dec 2018 11:23:04 +0000

How Parkrun volunteers sort barcodes - a computer scientist's perspective On the Christmas day of 2018, I volunteered at Norwich Parkrun. Towards the end, I ended up helping out with sorting the plastic barcodes. I find the whole process interesting. This is because sorting algorithm is an essential part of computer science curriculum $T$$T(n) = O(n^2)$$T$$n$$n^2$$T$$n$$n^2$$3+n$$n$$3$$n$$O(n+\frac{n^2}{k}+k)$$O(n^2)$$O(n \cdot k)$$k$$O(n)$$O(n^2)$$O(n^2)$$O(n)$

huawei_and_mulan

anonymous@undisclosed.example.com (Anonymous) — Sun, 13 Sep 2020 21:59:23 +0000

Huawei and Mulan I have to say some people have great imaginations which amazes me. Somehow some people think that 5G can cause coronavirus. How they managed to link the two topic together is beyond my comprehension. I would like to improve my creativity. To this end, I am trying to come up with a conspiracy theory between Huawei and Mulan. The full name of Mulan is actually Mulan Hua (in the format of forename-surname). I have to emphasise that the

image_convolution_in_fourier_domain

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Image convolution and deconvolution in the frequency domain Image convolution and deconvolution can be performed quickly in the frequency domain. In the frequency domain, pointwise multiplication is convolution, while pointwise division is deconvolution. The pseudo-code of the procedure is:

kate_s_syntax_highlighting_file_for_dokuwiki

anonymous@undisclosed.example.com (Anonymous) — Mon, 31 Dec 2018 03:33:25 +0000

Kate's Syntax Highlighting File for DokuWiki Links * /usr/share/kde4/apps/katepart/syntax/ * Working with Syntax Highlighting * vim-dokuwiki/syntax/dokuwiki.vim * ~/.kde/share/apps/katepart *

launch_a_read-only_web_server_display_some_sort_of_shell_output

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Launch a read-only web server displaying some sort of shell output You need to do it in a part: The script below will launch a shell output recording session. #!/bin/sh #start_read_only_screen.sh echo /tmp/$STY touch /tmp/$STY chmod 0600 /tmp/$STY script -a -f /tmp/$STY rm /tmp/$STY

leadership_and_the_janitor

anonymous@undisclosed.example.com (Anonymous) — Tue, 23 Jul 2019 21:31:36 +0000

Leadership and the Janitor * Be Cautious of Labels. Labels you place on people may define your relationship to them and bind their potential. Sadly, and for a long time, we labeled Bill as just a janitor, but he was so much more. Therefore, be cautious of a leader who callously says, “Hey, he’s just an Airman.” Likewise, don’t tolerate the O-1, who says, “I can’t do that, I’m just a lieutenant.”

life_philosophy

anonymous@undisclosed.example.com (Anonymous) — Wed, 19 Jun 2019 06:47:54 +0000

Life Philosophy * Colin Powell on Leadership * Leadership and the Janitor * The Distraction Economy * Friend vs Acquaintance

lion_king_2019_review

anonymous@undisclosed.example.com (Anonymous) — Sat, 10 Aug 2019 14:04:19 +0000

Lion King (2019) review I watched the new Lion King (Lion King 2019) recently. It is certainly an amazing feat of computer graphics. However, I feel the photorealism of the film hindered my ability to suspend my disbelief. I certainly feel the new Lion King is not as magical as the old Lion King (Lion King 1994).

list_of_funny_research_papers

anonymous@undisclosed.example.com (Anonymous) — Fri, 11 Oct 2019 15:13:09 +0000

List of Funny Research Papers Do you want to get better at pretending to be doing work? Here is your chance. The BMJ The BMJ is a journal with impact factor of 23.562 in 2017. They do a pretty decent Christmas specials which contain funny journal articles. Here are some of the selections of their interesting research:

mathematica_common_expressions

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Mathematica Common Expressions Taylor Series The $n^th$ term of the Taylor series expansion for the function $f(x)$ at $a$ can be obtained by the following function: TaylorTerm[fx_, x_, a_, n_] := (((Evaluate[D[fx, {x, n}]]) /. x -> a)/n!) (x - a)^n The sum of the first n terms for the Taylor series expansion for the function $f(x) at $

matlab_tips

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Matlab Tips General tips * If you plan to use parallel for-loop, put the parfor statement in the outermost loop to reduce inter-process communication. Simple text progress bar disp(' '); for i = 1:x fprintf('\b\b\b\b\b\b%05.2f%%', i/x*100); %%%%% Do your biddings here %%%%% end disp(' ');

merry_christmas_vs_happy_christmas

anonymous@undisclosed.example.com (Anonymous) — Sat, 07 May 2022 22:48:43 +0000

Happy Christmas vs Merry Christmas Quite a few people have said “Happy Christmas” to me, which made me really happy. However it made me wondered why they chose “Happy Christmas” over “Merry Christmas”, as I was taught to say “Merry Christmas

message_from_medic_with_codename_083083

anonymous@undisclosed.example.com (Anonymous) — Thu, 13 Dec 2018 05:57:33 +0000

Message from a medic with codename 083083 The original story is this weird_conversation_with_someone_who_claims_to_be_a_cambridge_graduated_doctor. Medic with codename 083083 sent me this the following threatening message: To decipher 083083, please look up ASCII conversion table. While I agree it is not really necessary to reveal the personal information for the person in question. I really did not like the threatening tone of the person who sent me the message. I made some of the change…

misconceptions_on_galileo_s_experiment_at_pisa_tower

anonymous@undisclosed.example.com (Anonymous) — Wed, 24 Jul 2019 07:37:44 +0000

Misconceptions on Galileo's experiment at Pisa Tower I think a lot of people have misconceptions on the implication of Galileo's experiment at Pisa Tower. Wikipedia says that Galileo “is said to have dropped two spheres of different masses from the Leaning Tower of Pisa to demonstrate that their time of descent was independent of their mass$$ F = ma $$$$ F = G \frac{m_1 m_2}{r^2}, $$$F$$m_1$$m_2$$r$$G$$m = m_2$$$ m_2 a = G \frac{m_1 m_2}{r^2}. $$$m_1$$m_2$$m_2$$$ a = G \frac{m_1}{r^2}.$$$m_1$$r…

modern_interpretation_of_the_return_of_the_princess_pearl

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Modern Interpretation of the Return of the Princess Pearl Well, below is my interpretation of The Return of the Princess Pearl. This interpretation is definitely Fair and Balanced (TM) Short version Basically the first season starts off with an illegitimate princess resulted from an one-night stand trying to claim inheritance. The show then moves on as a slice-of-life drama about that princess. There is an arc in the second season which features radicalisation. treason, liberation of a woman …

modify_the_url_which_android_uses_for_checking_internet_connectivity

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Modify the URL which Android uses for checking Internet connectivity I am currently in a hostile environment which blocks my connection to Google. From Lollipop onward Citation needed, Android checks the Internet connectivity of your current Wifi connection by making a HTTP request. Due to the fact that I cannot connect to Google, my Nexus 5 keeps thinking that my Wifi connection is not working, and it keeps trying to use the EDGE network. This costs me money.

my_pgp_key

anonymous@undisclosed.example.com (Anonymous) — Tue, 12 Sep 2023 22:11:59 +0000

My PGP key -----BEGIN PGP PUBLIC KEY BLOCK----- mDMEZOyT4BYJKwYBBAHaRw8BAQdAvWyddKPQWCLiW1JzvbUGLsrant3WHZtOK2vS P3VB/Ta0IkZ1ZnUgRmFuZyA8ZmFuZ2Z1ZnUyMDAzQGdtYWlsLmNvbT6IkAQTFggA OBYhBBOzfEwtqoNCVV7oKaEVhCM0Im8BBQJk7JPgAhsBBQsJCAcCBhUKCQgLAgQW AgMBAh4BAheAAAoJEKEVhCM0Im8Bc6cBALgTnygYlbePfQHJoPJmRJ9YpyU3gngh 8V0t3Oi4ecrHAP0ZBFsaAAbyOW2/iBKr8NKsCy8xuNtF38yv46atnvCsALQjRnVm dSBGYW5nIDxmYW5nZnVmdUBmYW5nZnVmdS5jby51az6IkAQTFggAOBYhBBOzfEwt qoNCVV7oKaEVhCM0Im8BBQJk7J4hAhsBBQsJCAcCBhUKCQgLAgQWAgMBAh4…

my_visit_to_south_foreland_lighthouse

anonymous@undisclosed.example.com (Anonymous) — Sat, 10 Aug 2019 19:50:44 +0000

My visit to South Foreland Lighthouse I visited South Foreland Lighthouse on 4th-Aug-2019. It was quite an interesting trip. This is mainly because the lighthouse is very historic. There are a few scientific-firsts associated with the lighthouse. South Foreland Lighthouse was originally built to help ships to avoid the Goodwin Sands, which has caused around 2,000 shipwrecks. The content of this article is a combination of information from the Wikipedia, and the information the tour guide told m…

notes_on_setting_up_raspberry_pi_2

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Notes on setting up Raspberry Pi 2 This post describes the stuff I did to my Raspberry Pi 2, which is the current acting home server. These configuration steps are probably useful for everyone. * Download and flash the Raspbian-lite image. * Remove the following packages:

on_freedom_of_expression_and_modern_internet

anonymous@undisclosed.example.com (Anonymous) — Wed, 13 Mar 2019 00:24:44 +0000

On Freedom of Expression and Modern Internet Recently I have been thinking about the philosophy behind free speech and modern technology. Speech has never truly been free – you always get the cultural / society / legal limit on what you can say. It also costs money or energy to make a speech – back in the days, perhaps you had to the soap box in Hyde Park, perhaps you had to spend money to print things, television and radio airtime both cost money as well. Internet is a great equaliser in terms…

on_uea_gig_ticket_price

anonymous@undisclosed.example.com (Anonymous) — Sun, 24 Nov 2019 00:27:01 +0000

On UEA Gig Ticket Price Abstract By analysing The Gig List UEA LCR Gig History 1963-2018 Complete , I discovered that the average ticket price ticket to a UEA SU's gig has been increasing on average 7.57% every year, since sterling decimalisation Decimal Day $$ y= 0.0048e^{0.0002x}, $$$x$

oobm_on_the_cheap

anonymous@undisclosed.example.com (Anonymous) — Mon, 31 Dec 2018 03:33:58 +0000

OOBM on the cheap Well, I run a server in China. I have managed to lose contact with the servers in numerous occasion, primarily due to my own stupidity. So I desperately need some sort of out-of-band management solution (OOBM). Primarily there are three ways to achieve this. I have listed them in the order of how easy it is to test then out.

openvpn_network_bridge_with_static_key_encryption

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

OpenVPN Network Bridge with Static Key Authentication OpenVPN has two authentication modes, one based on SSL/TLS security using RSA certificates and keys, the other using a pre-shared static key OpenVPN Security Review -> . A certain country's firewall tends to interrupt vanilla OpenVPN's connection if it is operated in TLS mode. I am not entirely sure how this is done, there are a lot of speculations on how it is…

pokemon_go_on_moto_e2

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Pokemon Go on Motorola Moto E2 To install Pokemon Go from Google Play, you phone needs to have 2GB RAM. Motorola Moto E2 only has 1GB RAM, and 4GB usable space in its flash memory. Here are the modification I did to enable my Moto E2 to run Pokemon Go.

pokemon_pick_up_lines

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Pokemon Pick Up Lines Here is a list of Pokemon related pick up lines that my friends came up with: * I wish you were a Snorlax as well, so we can find a nice spot to sleep. * If I were Nidoking, I would want you to be my Nidoqueen. * Are you a Charizard? Because you are hot!

preparation_of_raspberry_vodka

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Preparation of Raspberry Vodka Abstract In this article, I present a method for extracting chemical compounds from raspberry using 37.5% food-grade ethanol-water solution commonly known as vodka, in order to prepare a drink known as raspberry vodka.

raspberry_pi_weather_station_board

anonymous@undisclosed.example.com (Anonymous) — Sat, 19 Jan 2019 03:56:36 +0000

Raspberry Pi Weather Station Board Private Sections Click here Project Updates I bought an Arduino, another I2C logic level shifter. Now the goal has been moved to running BME280 and the PM2.5 sensor off an Arduino. The constraint is still the 4-wire connection to the outdoor environment. $\mathbf{^{\circ}C}$$^\circ$$^\circ$$V_{CBO}$$V_{CEO}$$V_{EBO}$$I_{C}$$V_{CEO}$$V_{CBO}$$V_{EBO}$$I_C$

rules_of_life

anonymous@undisclosed.example.com (Anonymous) — Fri, 12 Aug 2022 14:02:39 +0000

Rules of Life Here are some basic rules of life that everyone should follow: * You are only allowed tea at tea breaks, and you are only allowed coffee at coffee breaks. * The only correct answer to the question “tea or coffee?” is “both”

script_for_controlling_intel_cpu_frequencies

anonymous@undisclosed.example.com (Anonymous) — Wed, 31 Jul 2019 10:30:13 +0000

Scripts for controlling Intel CPU frequency My laptop is a Lenovo T440p with a i7-4900MQ. I run Folding@Home on two of my CPU cores. The CPU constantly overheats, and my fan is always spinning at 4440 RPM. I find the noise annoying. Here is what I have done to alleviate the problem.

setting_up_git_remote_origin

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Setting up git remote origin For the first time you set up git remote origin, you have to do these: git remote add origin git@fangfufu.co.uk:/JOSA_Paper.git git push -u origin master

setting_up_raspberry_pi_zero_on_otg_mode

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Setting up Raspberry Pi Zero on OTG mode Raspberry Pi Zeros are brilliant. By running them in Ethernet OTG mode, you literally only need a Micro-USB cable to control them. The guide to follow is this one, you literally follow them verbatim. However if you want to have stable MAC address, you need the following kernel options in ''/boot/cmdline.txt:

setting_up_remote_boinc

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Setting up remote BOINC Setting up a remote BOINC client seems to be a bit confusing, mainly due to the lack of error messages. This is what you have to do to get it working. * sudo apt-get install boinc-client * Modify /etc/boinc-client/remote_hosts.cfg

sicp-otaku_memes

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

SICP-Otaku Memes SICP was apparently the cannon fodder for first year computer science student from University of York. Dr Alan Wood used it as a recommended textbook for his POPL module, when I was a second year undergrad. I have to say I don't particularly like Scheme as a programming language, due to its Polish notation. I meant come on, none of the natural languages follows Polish notation, right? I find it hard to think in Polish notation.

sky_broadband_user_credential_extraction

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Sky Broadband User Credential Extraction Sky broadband embed user login credential in their routers. If you want to use a third-party router, you have to use Wireshark to sniff it out) (. Here is a summary of what you have to do: * Connect to your SkyHub using an RJ45 cable.

solid_ground

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Solid Ground, Marit Larsen Video Lyrics Cannot fall, never do regret Know just what is being said Know the risk you take Keep your head above it all Sure you can fall But not now you gotta prove Something new, being you, being you Can't feel, keep from asking why Be the strongest at goodbyes Know your place in life Now expand your wings and fly It reaches high but not, Enough you seem to me So incomplete, swept off your feet And let me tell you they will always pull you down …

standard_.gitignore_files

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Standard .gitignore files Latex The list below is imported from Kile's automatic clean-up settings. # Default ignore list *.aux *.bit *.blg *.bbl *.lof *.log *.lot *.glo *.glx *.gxg *.gxs *.idx *.ilg *.ind *.out *.url *.svn *.toc *.backup

star_wars_-_the_last_jedi_review

anonymous@undisclosed.example.com (Anonymous) — Fri, 20 Dec 2019 18:07:52 +0000

Star Wars: Last Jedi Review WARNING: This article contains spoilers. I will give Star Wars: Last Jedi 5.5/10, mainly because the story doesn't make much logical sense. Why is the Resistance portrayed as a good organisation? Why is the First Order considered as bad? I think the Resistance looks like an organisation that is very lacking in terms military tactics and discipline. Personally I support First Order, because they seem to be a better organisation.

star_wars_-_the_rise_of_skywalker

anonymous@undisclosed.example.com (Anonymous) — Sat, 08 Oct 2022 11:42:00 +0000

Star Wars: The Rise of Skywalker review I have just watched Star Wars IX. I feel the narrative is very lacking in terms of depth. There was a clear sense of “right” and “wrong”. However it doesn't really explain why the Sith is bad. If Sith is that bad, how did they manage to amass so many followers and build such a powerful fleet? It can't be that bad.

start

anonymous@undisclosed.example.com (Anonymous) — Mon, 02 Oct 2023 10:50:34 +0000

Public Notes Completed Notes General Computing * Notes on setting up Raspberry Pi 2 * Setting up Raspberry Pi Zero on OTG mode * Disable cursor animation in Office 2013 (also applies to Office 2016) * Setting up remote BOINC * Pokemon Go on Moto E2 * Script for controlling Intel CPU frequencies * Backing up DokuWiki * Launch a read-only web server display some sort of shell output * Flashing Olimex STM32-H103 using a Raspberry Pi * Docker quick how-to * Standard .gitigno…

the_equivalence_of_svd_and_eigendecomposition

anonymous@undisclosed.example.com (Anonymous) — Tue, 04 Jun 2019 12:39:44 +0000

The equivalence of SVD and eigendecomposition PCA originally formulated to use eigendecomposition, but we can use SVD instead. a = rand(4, 3); a = a - mean(a); [U, S, V_svd] = svd(a); [V_eig, D, W ]= eig(a * a'); % a == U * S * V_svd' % a * a' == U * S * V_svd' * V_svd * S' * U' % V_eig == W % S.^2 == D (subject to the different ordering of eigenvalues)

the_number_of_people_voted_in_an_instagram_poll

anonymous@undisclosed.example.com (Anonymous) — Tue, 16 Apr 2019 10:46:12 +0000

The number of people voted in an Instagram poll Instagram provides a polling feature, which allows the user to ask a question with two answers to the audiences. Once an audience pick one of the two answers, the percentage of users who pick each answer is displayed. $$ poll(a,\ b) = \Big(nint(\frac{100a}{a+b}),\ nint(\frac{100b}{a+b})\Big), $$$a$$b$$nint$$nint(x)$$x$$poll(a,\ b)$$\mathbb{N}_0$$poll(a,\ b)$$0 \le x \le 100$$poll(a, b)$$a$$b$

the_performance_of_sha256_and_sha512_algorithms_as_implemented_by_openssl

anonymous@undisclosed.example.com (Anonymous) — Wed, 23 Sep 2020 10:36:19 +0000

The performance of SHA256 and SHA512 algorithms as implemented by OpenSSL SHA256 and SHA512 are both cryptographic hash algorithms. They are used for detecting whether data had been modified. The digest size SHA256 and SHA512 are 256 bit and 512 bit respectively. SHA512 is more resistant to attacks compared to SHA256. However, interestingly enough, under x86-64 architecture, it is faster to compute SHA512 compared to SHA256. The reason is detailed in

the_tale_of_httpdirfs

anonymous@undisclosed.example.com (Anonymous) — Fri, 09 Aug 2019 12:24:27 +0000

The Tale of HTTPDirFS HTTPDirFS is a FUSE filesystem which allows you to mount a HTTP directory listing. It has a very interesting beginning. The story starts with a conversation with the admin of the-eye.eu, which is a website containing a lot of questionable content in terms of copyright. Below is the chat log copied from Discord.

thoughts_on_computer_science_outreach_campaigns

anonymous@undisclosed.example.com (Anonymous) — Sat, 30 Jan 2021 00:05:07 +0000

Thoughts computer science outreach campaigns I have a few thoughts on those computer science outreach campaigns. I think those campaigns to get general public in programming are perhaps a bit unhealthy. First of all, I think while outreach programs are good, I think the difficulty of programming is understated and the importance of programming is overstated.

use_rtmpdump_to_download_flowplayer_rtmp_videos

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Use RTMPDump to download Flowplayer videos Quite a lot of websites on the Internet use the Flowplayer to play RTMP video stream citation needed. Occasionally they would like you to download their videos, but they forgot to put up a “download” button. This is when the knowledge on this webpage will help you.

using_btrbk_to_backup_my_home_partition

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Using Btrbk to backup my home partition Due to the fiasco of running rm -rf on my home partition, and wiping out all my backup snapshots, I realised that it is important to have some sort of offline backups. Snapper Snapper, The ultimate Snapshot Tool for Linux creates snapshots, but manual operations are required to move those snapshots off to external backup devices (in order to offline backups). A better solution is desperately needed. I discovered Btrbk

using_openwrt_routers_to_link_two_subnets_together

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

Use OpenWRT router to link two subnet together * Install OpenVPN on both router. * Create an interface for the virtual network adapter that is used by OpenVPN. * Enable packet forwarding between the OpenVPN interface and your desired network interface.

what_are_the_little_things_that_make_a_day_slightly_above_average

anonymous@undisclosed.example.com (Anonymous) — Sat, 31 Mar 2018 00:38:16 +0000

What are the little things that make a day slightly above average? “”

word_replacer_ii_in_chrome

anonymous@undisclosed.example.com (Anonymous) — Sat, 06 Mar 2021 21:35:46 +0000

Word Replacer II in Chrome Life is much more fun if we can all have our own “safe and self-defining space”. This is why you should install World Replacer II on your Google Chrome. My current word-replacement list is the following below. Please feel free to import it. If you have any other better ideas, please register and leave your comments in the talk page.