OpenLLM-France/wikimedia huggingface dataset:
# History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Issues/1944 05
## P.03 - Contents Banner

The Australasian Radio World
Devoted entirely to Technical Radio
and incorporating
All-Wave All-World DX News
Vol. 8. - APRIL, 1944 - No. 12.

## P.03 - Publication Notes

Proprietor - A. G. HULL
Manager - Dudley L. Walter
Secretary - Miss E. M. Vincent
Short-wave Editor - L. J. Keast
For all correspondence: City Office - 243 Elizabeth St., Sydney - Phone MA2325
Office Hours - Week-days: 10 a.m. - 5 p.m., Saturdays: 10 a.m. - 12 noon
Editorial Office - 117 Reservoir Street, Sydney
Subscription Rates - 6 issues 5/3, 12 issues 10/6, 24 issues £1, Post free to any address
Service Departments - Back Numbers, 1/- ea., post free; Reply-by-mail Queries, 1/- each
Printed by Bridge Printery Pty. Ltd., 117 Reservoir Street, Sydney, N.S.W., for the proprietor of the "Australasian Radio World," 117 Reservoir St., Sydney (Footnote P.28)

## P.03 - Contents

CONTENTS:
CONSTRUCTIONAL -
Novel Detector in Contest Entry . . . . 6
An Amplifier Beyond Reproach? . . . . 11
TECHNICAL -
The Tropic-Proofing Era . . . . 5
A Serviceman's Lament . . . . 7
The Multi-Vibrator and its Uses . . . . 9
Radio Aids to U.S. Navigation . . . . 12
Technical Data on Valve Cathodes . . . . 14
Radio Heating is a Modern Wonder . . . . 17
Wider Tone Control . . . . 18
Serviceman Licences Issued . . . . 19
SHORTWAVE SECTION -
Shortwave Review . . . . 20
New Stations . . . . 20
Shortwave Notes and Observations . . . . 21
Loggings . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

## P.03 - Editorial Notes

Editorial
In last month's issue we had an article about communications receivers and forecast their popularity in the post-war era. This suggestion has been challenged by an entrant in our Utility Circuit Contest Mr. P. Stevens, of "Westdale," Fletchers Avenue, Bondi, who says, "Weak or distant stations, marred by static and fading are seldom patronized except by the DX enthusiasts, and the same thing applies to overseas short-wave stations. The thrill of listening to the "truth" on Tokyo or Berlin radio through a more or less dense cloud of interference will end together with the war, and as the continuous sideband fading on short-waves makes the tonal quality rather poor, receivers should be built for broadcast only." Chatting with factory set designers about this subject has shown that there are quite a few who readily agree with the opinion expressed by Mr. Stevens, and there seems to be quite a chance that the preference for dual-wavers will fade like it has for other "selling features" such as clock dials and push-button tuning. We have not been able to conduct a "Gallup Poll" on lines extensive enough to be considered representative, but it is fairly obvious that not five per cent of the listening time of the average dual-wave receiver is spent on the short-wave band. Yet on the other hand we read of thousands upon thousands of pounds being spent on the erection of bigger and still bigger short-wave transmitters, and doubtless they expect to have vast audiences. - A. G. HULL.
# How To Become A Good Student/Chapter 5 - Helping Others And Advising

Why help others? Ever thought of how well a professor knows the information; think he or she knew it that well the first time they taught it? I'll bet they didn't. When you take the time to help or teach someone else you're repeating the concept or facts in your own mind, verbalizing it, and thinking through it critically. The only caution I would give on helping others is if your professor grades on curve. You may help out the other too much and cut yourself out of the grade you deserve.
- jf (a solid C student)
# How To Become A Good Student/Conclusion

Now as a good student, you are allowed to contribute for the good. So, there are some facts that you must know after reading this Wikibook.
1.) Being a good student doesn't mean that you must be an angel. Because, at some situations you have to be a little rugged, "NOT MEAN". If someone fights with you, you first ignore but then if he insists, show him a good knuckle sandwich, but that doesn't matter. The thing that matters is your judgement to decide when to fight and when not to.
2.) As a good student, advantages of a good education must be known to you now. So, if you want to be better, always try knowing more, search good articles at Wikipedia, read good educational books. Contribute to a good field and plan an excellent career at this stage to prevent future difficulties.
3.) I created a quote that A magician tries to conceal his teachings but a good student always spreads/reveals his knowledge. Always help and support others as much as you can. If anyone is always getting bad grades, improve him so not only you but he's also happy. Of course, helping doesn't include cheating.
I hope you may follow these tips in your future. You are about to be on your journey as a good student for the first time. That's all you need to know! Take care and have a very happy life!
# How To Build A Teardrop Trailer

Travel trailers are not cheap. They can present a large investment both in terms of money, towing vehicles and fuel. In addition, with gas prices high, there is a desire by many to own smaller vehicles. So what does one do if you like to camp?
A teardrop trailer is a small lightweight camping trailer that can easily be towed behind any car. Conceived more than 60 years ago, this trailer is designed for 2 people with storage and a kitchen galley under a rear hatch. The nice thing is that it doesn't have to be configured this way. Since you build it yourself you can create and install just about any option you want. From extra bunk space to entertainment centers; its your trailer. Have it your way.
This book will show you how simple building a teardrop trailer can be. The focus will be upon a low cost design (<$1500) but we will also introduce the reader to some of the other, more complex and more expensive ways of construction.

## Chapters

    Cover · Noted contributors · Development
    Before you start
    Trailer
    Trailer Bed
    Walls and Doors
    Assembling the Body
    The Hatch
    Joints
    Assembling the Doors
    Interior
    Galley
    Finish
    Hatch Hinge
# How To Become A Good Student/Chapter 3 - Behavior
## Manners, The One Behind Your True Reputation

Whether you are a president at a conference or a normal guy in the street, your reputation is what your respect determines it all and the one behind your reputation is "Manners". Manners is almost everything you can represent at a meeting or anywhere in the world other than your contributions. Excellent behavior leads to excellent results. Behavior also determines the quality & dignity a person has. Behavior is developed easily in students, though it takes time.

## Ways To Behave

Good behavior should become a way of life, not just something that is shown or talked about. The ways to behave differs from situation to situation, for example.
If a man talks to you by saying "Hello!" or "Good Evening!" or "Good Afternoon!", your reply will absolutely be positive like " Hello! Nice to meet you too!"
Situations can be of two types:-
1.) Positive Situations - As illustrated in the example given above
2.) Negative Situations -
Example:- If someone teases you, you'll probably say a negative reply like "Stop teasing me, you idiot!!!"
Although someone can arise you to say a negative reply, you can say a reply which is not rude but still negative.
Example:- Watch "MTV's Boiling Points". In a situation, you'll see that the one who passes the time of the Boiling Point always/probably uses negative replies which aren't rude.

## Behaving At School/University

So how does all this behavior fit into your education? Well first of all you may find it much easier to deal with pressure, and you won't take it out on the people you love, but you can also use it to win the favour of your teacher. Giving out a pleasant, positive atmosphere is sure to make you stand out in your classes, and your teachers may be more willing to help you succeed.
So always try your best to be on your best behavior, no matter wherever you are, because it determines your respect in the world. Let's move onto management.
# How To Become A Good Student/Preface

"Study? Sooooo boring!"
I am a very good student (seriously). I have seen many students in my life who do not even care about themselves or their career. They act like wild animals. If I were them, I would rather change. So, let's come together and guide them to their correct path—a brighter and a happier future!
Each one of us has loved to hate studies, and still managed to get through. We've always envied the so called "scholars" of our class, who could score twice the marks with half the study. And who will like something that he's not successful at? But as is true with every game, there are certain rules to study better. When one plays the game of study with these rules—it becomes beautifully simplified and extremely easy.
So the question is... Are you with me?
# Introduction to Chemical Engineering Processes/Chapter 1 Practice Problems/Solutions

3c. 111.7 degrees Celsius
3e. When larger quantities of molecules are involved in measurement, such that interatomic affects have little statistical consequence, the gas will be more ideal. At extremely high/low temperatures the gas will be less ideal.
# Introduction to Chemical Engineering Processes/Chapter 3 Practice Problems
## Chapter 3 Practice Problems

1. a) Look up the composition of air. Estimate its average molecular weight.
b) Qualitatively describe whether the density of air should be large or small compared to the density of water.
c) Qualitatively describe whether the mass density of air should be large or small compared to that of oxygen if the same number of moles of the two gasses are contained in identical containers.
d) If the density of air under certain conditions is 1.06 g/m^3, how much does a gallon of air weigh?
2. a) Using both of the formulas for average density, calculate estimates for the density of a 50% by mass solution of toluene and benzene. Comment on the results.
b) Repeat this calculation for varying concentrations of toluene. When does it make the most difference which formula you use? When does it make the least? Show the results graphically. Would the trend be the same for any binary solution?
c) Suppose that a 50% mixture of toluene and benzene is to be separated by crystallization. The solution is cooled until one of the components completely freezes and only the other is left as a liquid. The liquid is then removed. What will the majority of the solid be? What will the liquid be? What temperature should be used to achieve this? (give an estimate)
d) In the crystallization process in part c, suppose that the after separation, the solid crystals contained all of the benzene and 1% of the toluene from the original mixture. Suppose also that after melting the solid, the resulting liquid weighed 1435 g. Calculate the mass of the original solution.
3.. Consider a publishing company in which books are to be bound, printed, and shipped. At 5 a.m. every morning, a shipment of 10,000 reams of paper comes in, as well as enough materials to make 150,000 books, and 30000 pounds of ink. In this particular plant, the average size of a book is 250 pages and each uses about 0.2 pounds of ink.
a) How many books can be printed for each shipment? (Hint: What is the limiting factor?)
b) Suppose that, on average, 4% of all books printed are misprints and must be destroyed. The remaining books are to be distributed to each of 6 continents in the following proportions:
Each book that is printed (including those that are destroyed) costs the company US$0.50 to print. Those that are shipped cost the following prices to ship from the US:
If each book sells for an equivalent of US$1.00, what is the maximum profit that the company can make per day?
c) Challenge What is the minimum number of books that the company can sell (from any continent) in order to return a profit? (Hint: what is the total cost of this scheme? Does it matter where the books are sold once they are distributed?)
d) How many pounds of ink per day end up in each continent under the scheme in part b? How many pages of paper?
e) Can you think of any ways you can improve this process? What may be some ways to improve the profit margin? How can inventory be reduced? What are some possible problems with your proposed solutions?
Solutions
# Introduction to Chemical Engineering Processes/Chapter 3 Practice Problems/Solutions
## Problem 1

D.

## Problem 2

volume of Toluene = 53.199 cm^3

## Problem 3

Important Conversion Factor : 1 ream = 500 sheets
A.
B.
C.
D.
E.
# Introduction to Chemical Engineering Processes/Chapter 2 Practice Problems/Solutions

Answer for 1
a)% of water in original solution=91.66%
b)water remained=10^-4 g
c)Yes, the salt solution would be safe for drinking because it has 91.66% water content.
# I Ching/Core Hexagrams

I Ching | 64 Hexagrams | Core Hexagrams | Yarrow Stalks | Explanations | Hosts | Interpretation | Moving Line

## Core Hexagrams

The Core Hexagrams (Core Gua) are constructed from the middle 4 lines of a non-core Gua, by taking lines {2, 3, 4} as the lower trigram of the Core Gua, and lines {3 ,4, 5} as the upper trigram of the Core Gua. Lines 1 and 6 of a non-core Gua are ignored. The Core Gua is also called the Mutual Gua. In Chinese, the term "Gua" is written as 卦. A Core Gua provides another level of understanding about a person's current situation.
The Core of the Core Hexagrams are constructed from the Core Hexagrams, using the middle 4 lines of the Core Hexagrams. All the 64 Hexagrams can be converted into 12 Core Hexagrams which in turn, using the same process, can then be converted into 4 Core of the Core Hexagrams.
| Core of the Core Gua | Core Gua | Non-core Gua |
| 01 ䷀ (乾 qián) | | |
| | 28 ䷛ (大過 dà guò) | |
| | | 30 ䷝ (離 lí) |
| | | 55 ䷶ (豐 fēng) |
| | | 56 ䷷ (旅 lǚ) |
| | | 62 ䷽ (小過 xiǎo guò) |
| | 43 ䷪ (夬 guài) | |
| | | 14 ䷍ (大有 dà yǒu) |
| | | 32 ䷟ (恆 héng) |
| | | 34 ䷡ (大壯 dà zhuàng) |
| | | 50 ䷱ (鼎 dǐng) |
| | 44 ䷫ (姤 gòu) | |
| | | 13 ䷌ (同人 tóng rén) |
| | | 31 ䷞ (咸 xián) |
| | | 33 ䷠ (遯 dùn) |
| | | 49 ䷰ (革 gé) |
| 02 ䷁ (坤 kūn) | | |
| | 23 ䷖ (剝 bō) | |
| | | 03 ䷂ (屯 zhūn) |
| | | 08 ䷇ (比 bǐ) |
| | | 20 ䷓ (觀 guān) |
| | | 42 ䷩ (益 yì) |
| | 24 ䷗ (復 fù) | |
| | | 04 ䷃ (蒙 méng) |
| | | 07 ䷆ (師 shī) |
| | | 19 ䷒ (臨 lín) |
| | | 41 ䷨ (損 sǔn) |
| | 27 ䷚ (頤 yí) | |
| | | 29 ䷜ (坎 kǎn) |
| | | 59 ䷺ (渙 huàn) |
| | | 60 ䷻ (節 jié) |
| | | 61 ䷼ (中孚 zhōng fú) |
| 63 ䷾ (既濟 jì jì) | | |
| | 38 ䷥ (睽 kuí) | |
| | | 05 ䷄ (需 xū) |
| | | 09 ䷈ (小畜 xiǎo chù) |
| | | 48 ䷯ (井 jǐng) |
| | | 57 ䷸ (巽 xùn) |
| | 40 ䷧ (解 xiè) | |
| | | 15 ䷎ (謙 qiān) |
| | | 22 ䷕ (賁 bì) |
| | | 36 ䷣ (明夷 míng yí) |
| | | 52 ䷳ (艮 gèn) |
| | 54 ䷵ (歸妹 guī mèi) | |
| | | 11 ䷊ (泰 tài) |
| | | 18 ䷑ (蠱 gǔ) |
| | | 26 ䷙ (大畜 dà chù) |
| | | 46 ䷭ (升 shēng) |
| 64 ䷿ (未濟 wèi jì) | | |
| | 37 ䷤ (家人 jiā rén) | |
| | | 06 ䷅ (訟 sòng) |
| | | 10 ䷉ (履 lǚ) |
| | | 47 ䷮ (困 kùn) |
| | | 58 ䷹ (兌 duì) |
| | 39 ䷦ (蹇 jiǎn) | |
| | | 16 ䷏ (豫 yù) |
| | | 21 ䷔ (噬嗑 shì kè) |
| | | 35 ䷢ (晉 jìn) |
| | | 51 ䷲ (震 zhèn) |
| | 53 ䷴ (漸 jiàn) | |
| | | 12 ䷋ (否 pǐ) |
| | | 17 ䷐ (隨 suí) |
| | | 25 ䷘ (無妄 wú wàng) |
| | | 45 ䷬ (萃 cuì) |
back to: I Ching
# I Ching/Host Of The Hexagrams

I Ching | 64 Hexagrams | Core Hexagrams | Yarrow Stalks | Explanations | Hosts | Interpretation | Moving Line

## Host Of The Hexagrams

Each of the 64 Hexagrams (Gua) has one or more Hosts. A Host represents the main characteristics of a Gua. A Host is a line in a Gua, and the line number, as shown below, is counted from bottom to top, where the bottom line is counted as 1, the second line from the bottom as 2, and the top line is counted as 6. For example, in Hexagram 07, the Host is 2, the only Yang line in the Gua. The lines 2 and 5 are frequently the hosts of the Gua, as they occupy the central position of the lower/inner and upper/outer trigrams respectively.
| Hexagram (Gua) | Host of the Gua (line number) |
| 01 ䷀ (乾 qián) | 5 |
| 02 ䷁ (坤 kūn) | 2 |
| 03 ䷂ (屯 zhūn) | 1, 5 |
| 04 ䷃ (蒙 méng) | 2, 5 |
| 05 ䷄ (需 xū) | 5 |
| 06 ䷅ (訟 sòng) | 5 |
| 07 ䷆ (師 shī) | 2 |
| 08 ䷇ (比 bǐ) | 5 |
| 09 ䷈ (小畜 xiǎo chù) | 4 |
| 10 ䷉ (履 lǚ) | 3, 5 |
| 11 ䷊ (泰 tài) | 2, 5 |
| 12 ䷋ (否 pǐ) | 2, 5 |
| 13 ䷌ (同人 tóng rén) | 2, 5 |
| 14 ䷍ (大有 dà yǒu) | 5 |
| 15 ䷎ (謙 qiān) | 3 |
| 16 ䷏ (豫 yù) | 4 |
| 17 ䷐ (隨 suí) | 1 |
| 18 ䷑ (蠱 gǔ) | 6 |
| 19 ䷒ (臨 lín) | 1, 2 |
| 20 ䷓ (觀 guān) | 5, 6 |
| 21 ䷔ (噬嗑 shì kè) | 4 |
| 22 ䷕ (賁 bì) | 2, 6 |
| 23 ䷖ (剝 bō) | 6 |
| 24 ䷗ (復 fù) | 1 |
| 25 ䷘ (無妄 wú wàng) | 1, 5 |
| 26 ䷙ (大畜 dà chù) | 6 |
| 27 ䷚ (頤 yí) | 6 |
| 28 ䷛ (大過 dà guò) | 2, 5 |
| 29 ䷜ (坎 kǎn) | 2, 5 |
| 30 ䷝ (離 lí) | 2, 5 |
| 31 ䷞ (咸 xián) | 3, 6 |
| 32 ䷟ (恆 héng) | 2 |
| 33 ䷠ (遯 dùn) | 2 |
| 34 ䷡ (大壯 dà zhuàng) | 4 |
| 35 ䷢ (晉 jìn) | 5 |
| 36 ䷣ (明夷 míng yí) | 2, 5 |
| 37 ䷤ (家人 jiā rén) | 2, 5 |
| 38 ䷥ (睽 kuí) | 2, 5 |
| 39 ䷦ (蹇 jiǎn) | 5 |
| 40 ䷧ (解 xiè) | 2, 5 |
| 41 ䷨ (損 sǔn) | 5 |
| 42 ䷩ (益 yì) | 1 |
| 43 ䷪ (夬 guài) | 6 |
| 44 ䷫ (姤 gòu) | 1 |
| 45 ䷬ (萃 cuì) | 2, 5 |
| 46 ䷭ (升 shēng) | 1 |
| 47 ䷮ (困 kùn) | 5 |
| 48 ䷯ (井 jǐng) | 5 |
| 49 ䷰ (革 gé) | 5 |
| 50 ䷱ (鼎 dǐng) | 5 |
| 51 ䷲ (震 zhèn) | 1 |
| 52 ䷳ (艮 gèn) | 6 |
| 53 ䷴ (漸 jiàn) | 2, 5 |
| 54 ䷵ (歸妹 guī mèi) | 3, 5 |
| 55 ䷶ (豐 fēng) | 5 |
| 56 ䷷ (旅 lǚ) | 5 |
| 57 ䷸ (巽 xùn) | 5 |
| 58 ䷹ (兌 duì) | 2, 5 |
| 59 ䷺ (渙 huàn) | 4, 5 |
| 60 ䷻ (節 jié) | 5 |
| 61 ䷼ (中孚 zhōng fú) | 2, 5 |
| 62 ䷽ (小過 xiǎo guò) | 2, 5 |
| 63 ䷾ (既濟 jì jì) | 2 |
| 64 ䷿ (未濟 wèi jì) | 5 |
back to: I Ching
# I Ching/The 3-coin Method

The following method of divination by random casting of coins is described by Stephen Karcher in The Elements of the I Ching (1995), page 24 (published by Element Books):
   To use the coin oracle, you must have three similar coins. Heads are yang and have value 3. Tails are yin and have value 2. Throw the coins six times and add up the numbers each time. For each throw record the number and kind of line it refers to (6 = transforming yin; 7 = stable yang; 8 = stable yin; 9 = transforming yang). Form your hexagram from the bottom up, then use the key to the hexagrams ... to determine its number and name.
Karcher explains (page 15) that transforming lines (or moving lines) are "hot spots that tell you where and how things are moving and suggest specific strategies to deal with them."
# LPI Linux Certification/Linux as a virtualization guest
## Detailed Objectives

(LPIC-1 Version 5.0)
Weight: 1
Description: Candidates should understand the implications of virtualization and cloud computing on a Linux guest system.
Key Knowledge Areas:
* Understand the general concept of virtual machines and containers.
* Understand common elements virtual machines in an IaaS cloud, such as computing instances, block storage and networking.
* Understand unique properties of a Linux system which have to changed when a system is cloned or used as a template.
* Understand how system images are used to deploy virtual machines, cloud instances and containers.
* Understand Linux extensions which integrate Linux with a virtualization product.
* Awareness of cloud-init.
The following is a partial list of the used files, terms and utilities:
* Virtual machine
* Linux container
* Application container
* Guest drivers
* SSH host keys
* D-Bus machine id
# LPI Linux Certification/Maintain System Time
## Detailed Objectives

(LPIC-1 Version 5.0)
Weight: 3
Description:
Candidates should be able to properly maintain the system time and synchronize the clock via NTP.
Key Knowledge Areas:
* Set the system date and time.
* Set the hardware clock to the correct time in UTC.
* Configure the correct timezone.
* Basic NTP configuration using ntpd and chrony.
* Knowledge of using the pool.ntp.org service.
* Awareness of the ntpq command.
The following is a partial list of the used files, terms and utilities:
* /usr/share/zoneinfo/
* /etc/timezone
* /etc/localtime
* /etc/ntp.conf
* /etc/chrony.conf
* date
* hwclock
* timedatectl
* ntpd
* ntpdate
* chrony
* pool.ntp.org
# LPI Linux Certification/LPIC2 Exam 202/Network Troubleshooting

* LPIC2 Exam 202
* Detailed_Objectives
* Networking
* Basic networking configuration
* Advanced Network Configuration and Troubleshooting
* Mail & News
* DNS
* Web Services
* Network Client Management
* System Security
* Network Troubleshooting
* Exercises results

## Section Overview

* Troubleshooting network issues

## Troubleshooting network issues
### Overview

Description: The candidate should be able to identify and correct common network setup issues to include knowledge of locations for basic configuration files and commands.
Key files, terms, and utilities include:
# LPI Linux Certification/LPI Permission

Date: Fri, 16 Jan 2004 14:33:06 -0500 From: "Wilma Silbermann" <wilma@lpi.org> To: "m strawser" <mind3ras3r@yahoo.com> Subject: Re: reprinting of exam objectives
Hi there Mark,
We are pleased that you are creating more training material for the LPI exams and would have no problem approving your request to reprint the objectives as long as you ensure you show that LPI does not approve or endorse your book in any way.
You may use the logo in the same manner - please read the logo license;
https://www.lpi.org/en/logo.html
Please give me a call if you have any further concerns or questions on this or any other matter.
Thanks again for your support of LPI.
Wilma
# LPI Linux Certification/Localisation and internationalisation
## Detailed Objectives

(LPIC-1 Version 5.0)
Weight: 3
Description: Candidates should be able to localize a system in a different language than English. As well, an understanding of why LANG=C is useful when scripting.
Key Knowledge Areas:
* Configure locale settings and environment variables.
* Configure timezone settings and environment variables.
The following is a partial list of the used files, terms and utilities:
* /etc/timezone
* /etc/localtime
* /usr/share/zoneinfo/
* LC_*
* LC_ALL
* LANG
* TZ
* /usr/bin/locale
* tzselect
* timedatectl
* date
* iconv
* UTF-8
* ISO-8859
* ASCII
* Unicode
# LPI Linux Certification/Logical Volume Manager
## Detailed Objectives (204.3)

(LPIC-2 Version 4.5)
Weight: 3
Description: Candidates should be able to create and remove logical volumes, volume groups, and physical volumes. This objective includes snapshots and resizing logical volumes.
Key Knowledge Areas:
* Tools in the LVM suite
* Resizing, renaming, creating, and removing logical volumes, volume groups, and physical volumes
* Creating and maintaining snapshots
* Activating volume groups
Terms and Utilities:
* /sbin/pv*
* /sbin/lv*
* /sbin/vg*
* mount
* /dev/mapper/
* lvm.conf
# LPI Linux Certification/Mail Transfer Agent (MTA) Basics
## Detailed Objectives

(LPIC-1 Version 5.0)
Weight: 3
Description:
Candidates should be aware of the commonly available MTA programs and be able to perform basic forward and alias configuration on a client host. Other configuration files are not covered.
Key Knowledge Area(s):
* Create e-mail aliases.
* Configure e-mail forwarding.
* Knowledge of commonly available MTA programs (postfix, sendmail, exim) (no configuration).
The following is a partial list of the used files, terms and utilities:
* ~/.forward
* sendmail emulation layer commands
* newaliases
* mail
* mailq
* postfix
* sendmail
* exim
# Java Programming/Regular Expressions

* Navigate Advanced topic: ( v • d • e )
* Networking
* Database programming
* Regular Expressions
* Libraries, extensions and frameworks
* 3D programming
* Java Native Interface
* Invoking C
* Byte Code
The regular expressions (regex) are provided by the package java.util.regex.

## Researches

The Pattern class offers the function matches which returns true if an expression is found into a string.
For example, this script returns the unknown word preceding a known word:
The Matcher class allows to get all matches for a given expression, with different methods:
* find: find the next result.
* group: displays the result.
For example, this script displays the HTML b tags contents: