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Guide to Sail Cruising Courses | Sail Cruising | Courses | Learning | Courses & Training | RYA - Royal Yachting Association


Saved by uncleflo on January 2nd, 2020.

Browse the Sail Cruising training path below - just click on any course to be taken to the course details page, and search for a centre running that course.

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Types of rope


Saved by uncleflo on January 2nd, 2020.

Rope makers seem to delight in confusing us with science and/or extraordinary polysyllabic names. Let me try to cut through the guff a little. Also known as Terylene or Dacron, polyester is the stuff from which most “ordinary” rope and line is made of. It is resistant to rot and ultra-violet (UV), sinks in water and comes in a variety of constructions: 3-strand pre-stretched - can be spliced in the normal fashion, though it is a good idea to use 4 or 5 tucks instead of the 3 used in natural fibre ropes. The “pre-stretch” refers to an extra tweak imparted during the making of the rope which makes it more suitable for halyards and bell ropes. Very important, that - could you imagine the cacophony which would result from using stretchy rope? The snag with this construction is that it can kink, so it’s unusual to use it as a sheet.

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Beginner's Guide: How To Paint A Car At Home In 4 Easy Steps - Eastwood - YouTube


Saved by uncleflo on December 28th, 2019.

Broken down into 4 easy steps, this is the definitive guide to achieving professional results while painting at home in your garage or driveway. Let's get started! Since 1978 Eastwood has been supplying products to the people who want to do the job right. Eastwood offers a complete line of hand tools, welders, plasma cutters & accessories, metal working tools, powder coating supplies, paint and paint guns, specialty paints and hard to find products, all for the DIY-er. Eastwood has all the tools and supplies you need to restore your car, truck or motorcycle. How to paint a car at home! Learn every step from bare metal to color sanding and buffing. We teach you how to block sand, how to apply body filler, how to sand body filler, how to spray primer, how to spray high build primer, how to sand primer, how to spray basecoat with an HVLP paint gun, how to spray clear and how to color sand and buff to get a perfect finish. We even show you all the tools you need to paint a car.

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Eye splice in double braid polyester rope - YouTube


Saved by uncleflo on December 28th, 2019.

How to make an eye splice in a double braid polyester rope for e.g. halyards. SPLICING TOOLS can be bought at: https://www.premiumropes.com/splicing-rope/splicing-tools Do you want to make an eye-splice yourself? Premiumropes carries the most complete range of rope splicing products of brands like D-SPLICER and Selma. All used and tested daily by our own riggers.

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How To Set Up an Apache, MySQL, and Python (LAMP) Server Without Frameworks on Ubuntu 14.04 | DigitalOcean


Saved by uncleflo on December 19th, 2019.

This article will walk you through setting up a server with Python 3, MySQL, and Apache2, sans the help of a framework. By the end of this tutorial, you will be fully capable of launching a barebones system into production. Django is often the one-shop-stop for all things Python; it’s compatible with nearly all versions of Python, comes prepackaged with a custom server, and even features a one-click-install database. Setting up a vanilla system without this powerful tool can be tricky, but earns you invaluable insight into server structure from the ground up. This tutorial uses only package installers, namely apt-get and Pip. Package installers are simply small programs that make code installations much more convenient and manageable. Without them, maintaining libraries, modules, and other code bits can become an extremely messy business.

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Marine Grade Metals | Metal Supermarkets UK - Stainless Steel, Aluminium, Bright, Black, Engineering, Bronze, Copper, Brass, Tool, Galvanized


Saved by uncleflo on December 19th, 2019.

When a metal is exposed to underwater or wet environments, marine grade metals may be necessary to prevent the material from failing under the conditions. To be considered a marine grade, the material must be able to resist corrosive effects that are common in a water environment. To achieve this, special alloying elements are added to these grades in order to defend against corrosion. Marine grades can be found in most of the metal types, which include aluminium, stainless steel, brass, bronze, copper and carbon steel. Most carbon steel is not well-suited for marine environments, however, there are several marine grade carbon steels available. AH36, DH36, and EH36 are all examples of commonly used marine grade carbon steels approved by the American Bureau of Shipping. These grades will have slightly more alloying elements such as manganese and chromium compared to their ASTM grade counterparts, which helps achieve higher strength and more corrosion resistance. There are also marine grades of engineering steel as well. Grades MD, ME, MF, MG, and others can provide the strength that normal alloy steel is known for, and have also been approved by the American Bureau of Shipping for use in shipbuilding applications.

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Choosing the Right Switch: Know Your AC from Your DC


Saved by uncleflo on December 18th, 2019.

When picking a switch to use in electrical design, many people believe they can use any switch, provided its current rating is more than the maximum load in the circuit. This, of course, isn’t true. Alternating current (ac) or direct current (dc) circuits are capable of carrying very different currents, as illustrated by the ratings on the switch in Figure 1. This is why it’s so important for designers and engineers to understand how to pick the right switch for their product.

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Cold Cranking Amps (CCA) | How to Choose Your Battery | Autobatteries.com | Clarios


Saved by uncleflo on December 17th, 2019.

CCA is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures. Generally speaking, it is easier to start an engine in a warm environment than in a cold one. The rating refers to the number of amps a 12-volt battery can deliver at 0°F for 30 seconds while maintaining a voltage of at least 7.2 volts. The higher the CCA rating, the greater the starting power of the battery. If you live in a cold climate, the CCA rating is a more important consideration than it is if you live in a warm one. Battery starting power deteriorates as the battery ages, so a battery with higher starting power should give you more confidence over time. Replacement batteries should equal or exceed the OE battery in ratings. Replacing a battery with a battery that has a lower CCA than the original equipment may result in poor performance.

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How Heat Pumps Work - ADVANCED (design data) - YouTube


Saved by uncleflo on October 11th, 2019.

In this video we take a look at the technical data of how heat pumps work. Covering the basics, showing the typical system along with the main components and an animated drawing explaining its operation in both cooling and heating mode as well as how the refrigerant works.

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Hot Water Systems – A DIY Guide to Different Domestic Heating and Hot Water Systems with Common Faults and How to Cure them


Saved by uncleflo on September 9th, 2019.

A guide to the most common types of domestic heating and hot water systems with diagrams, including indirect boiler system, unvented system, thermal store. A guide to the different ways of heating domestic hot water so you can identify problems and faults with the hot water tank or central heating system and carry out any maintenance needed. Advice on identifying the type of hot water system you have and the types of maintenance needed, faults with the heating system and how to carry out any maintenance needed. Advice on identifying the type of hot water system you have and the types of maintenance needed. In the majority of houses in this country, there are two different types of hot water system. The circulation from a boiler around the radiators is the central heating system. The water to your taps is the domestic hot water. The water to your radiators is the central heating system.

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IPX Rating System: What It Means And Why You Should Know | Gear Mashers


Saved by uncleflo on September 9th, 2019.

The IPX Rating System is used to evaluate how resistant products are to environmental conditions. Many cycling and camera products often come with an IPX rating letting the consumer know how well an item will hold up under certain environmental conditions. The IP (Ingress Protection) numbers are written as IPXX, where “X”s are placeholders for numbers. The first “X” represents solid (dust/particle) resistance and the second “X” represents liquid resistance (water). When looking for cycling equipment or photography equipment, those products that have a higher IPX rating will be able to withstand the elements for longer periods of time without failure.For those who commute by bike, an IPX4 or greater will help keep your gear dry.

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AWS Aurora MySQL – HA, DR, and Durability Explained in Simple Terms - Percona Database Performance Blog


Saved by uncleflo on July 11th, 2019.

It’s a few weeks after AWS re:Invent 2018 and my head is still spinning from all of the information released at this year’s conference. This year I was able to enjoy a few sessions focused on Aurora deep dives. In fact, I walked away from the conference realizing that my own understanding of High Availability (HA), Disaster Recovery (DR), and Durability in Aurora had been off for quite a while. Consequently, I decided to put this blog out there, both to collect the ideas in one place for myself, and to share them in general. Unlike some of our previous blogs, I’m not focused on analyzing Aurora performance or examining the architecture behind Aurora. Instead, I want to focus on how HA, DR, and Durability are defined and implemented within the Aurora ecosystem.  We’ll get just deep enough into the weeds to be able to examine these capabilities alone.

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Online Photography Training Course, Photography Made Easy


Saved by uncleflo on July 9th, 2019.

Photography Made Easy gives you the knowledge and skills you need to finally master your camera and capture pro-level pictures – every time. Delivered by an award-winning professional photographer and university lecturer, the Photography Made Easy course teaches you 20 fields of photography: from creative photography to landscape to portrait to fashion to travel to sports photography to editing and more.

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Lab 2 - Build a Failover Solution with Amazon Route 53 and Amazon RDS Read Replication - YouTube


Saved by uncleflo on June 23rd, 2019.

Lab-2: Below is the steps that we had followed to setup Route 53 failover and achive disaster recovery of Application and RDS database. We will examine the Primary Region 1 and what to do, the Secondary Region 2 and the steps there, Failover route 53 from one region to another and set it up, and Test your failover.

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Cube in a cube / Turners cube - YouTube


Saved by uncleflo on June 23rd, 2019.

I've made several of these Turners Cubes over the years when I was in the US Air Force, most of the time to teach younger Airmen that you could square a part in a lathe using a 4 jaw chuck. I never used a holding ring nor did I use the hot glue. Each cube was cut from the inside one to the outer one. Sometimes we would heat the cube and freeze a steel ball from a bearing and drop it into the center cube, when everything went back to room temp the steel ball was captured in the smallest cube. This was also a way to teach new guys coming in to a machine shop to think outside of the box to come up with ways to machine parts. You have to understand, that back in the 1970's and in to the late 80's or 90's most of our shops were still using machinery dating back to WWII and we didn't have a lot of tooling like downtown shops or factories had. So we had to come up with ways to use the tooling on hand and make tooling that would work to fix and or make parts for aircraft. It was a real learning experience during those times.

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PHP Unit Testing with PHPUnit | Udemy


Saved by uncleflo on June 23rd, 2019.

Learning how to write unit tests for your code will make you write better code. With automated tests, you can find bugs more easily, and if you break something you'll notice straight away. Many experienced developers write unit tests for their code. It's a repeatable way of checking that the code works as intended, and also serves as documentation. Many popular PHP projects are unit tested, such as WordPress and Moodle, and if you use frameworks such as Laravel or Symfony, these provide tight integration with the PHPUnit testing framework.

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Getting Started with Version 8 of PHPUnit – The PHP Testing Framework


Saved by uncleflo on June 23rd, 2019.

The documentation for PHPUnit 8 can be found here. We distribute a PHP Archive (PHAR) that contains everything you need in order to use PHPUnit 8. Simply download it from here and make it executable: You can add PHPUnit as a local, per-project, development-time dependency to your project using Composer: Please refer to the documentation for details on how to verify PHAR releases of PHPUnit.

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DIY 24v LiFePO4 Solar Battery Bank! Beginner Friendly, 2.4 kWh, Cheap, Full Tutorial! - YouTube


Saved by uncleflo on June 23rd, 2019.

Safety Update: If the cells have a voltage difference of more than .2 of a volt (example: one cell is 2.7 volts, and another cell is 3.5 volts), you should not parallel connect, and instead discharge the higher voltage cell with a 25-50 watt, 1.5-2.7 ohm resistor. Just attach the leads of the resistor to the individual higher voltage cell, and wait till it is at a voltage that is closer to the other cells. When they are within .2 volts of each other, then you can connect them in parallel and allow them to equalize. Another way to do this is to charge the lower voltage cells, but 3 volt chargers are not easy to find, so I would stick to the resistor method. These resistors only cost a dollars each, and you can find them at most electronics supply stores.

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PDF - Four or more layer PCB design for beginners using EAGLE


Saved by uncleflo on June 23rd, 2019.

With microcontrollers and other Integrated Circuit (IC)’s getting smaller and smaller Printed Circuit Board (PCB) design gets more and more difficult. 2 layer PCB design is getting common for small companies and hobbyists but 4 layer or more is a bit daring for those used to 2 layers. When designing a circuit with a Ball Grid Array (BGA) that has 100 or more pins a 4 layer circuit board is necessary, but more layers can make designing easier. With prices of 4 layer boards getting lower it can be a better idea to route a board thats hard to do in 2 layers in 4 layers as it can save a lot of time. This document will explain the basics of routing PCBs with 4 or more layers with Cadsoft Eagle.

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Containers: A Complete Guide | IBM


Saved by uncleflo on May 12th, 2019.

This guide looks at the importance of containers in cloud computing, highlighting the benefits and showing how containers figure into such technologies as Docker, Kubernetes, Istio, VMs, and Knative. A container is a small file that packages together application code along with all the libraries and other dependencies that it needs to run. By packaging together applications, libraries, environment variables, other software binaries and configuration files, a container guarantees that it has everything needed to run the application out of the box, regardless of the operating environment in which the container runs. A key characteristic of a container is that it is small and fast because it uses some of the underlying host operating system's resources to run rather than containing a whole OS of its own.

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SQL Server 2016: Create a Database User


Saved by uncleflo on May 5th, 2019.

In SQL Server, you can create a database user to allow different users or processes access to a particular database. Even though we have just created a login that can successfully connect to SQL Server, that login still can't access our Music database. This is because we haven't yet associated that login with a database user. There are four things you need to do in order to provide access to a database:

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How TF-IDF algorithm determines keyword importance - arbitrue Blog


Saved by uncleflo on December 23rd, 2018.

There are many tools in the developer’s toolbox when it comes to automatic data extraction. A good example is TF-IDF algorithm (Term Frequency – Inverse Document Frequency) which helps the system understand the importance of keywords extracted using OCR. Here’s how TF-IDF can be used for invoice and receipt recognition. In this article we focus on other techniques in order to make this text file “understandable” to a computer. For this purpose, we must delve into the world of NLP or Natural Language Processing. We will focus mainly on how we can transform our file of raw text into a format that will easily be understandable by our algorithm. In a nutshell, TF-IDF is a technique for understanding how important a word is in a document which is often used as a weighting factor for numerous use cases. TF-IDF takes under consideration how frequent a word appears in a single document in relation to how frequent that word is in general. Search engines can use TF-IDF to determine which results are the most relevant for a search query.

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Term Frequency and Inverse Document Frequency (tf-idf) Using Tidy Data Principles


Saved by uncleflo on December 23rd, 2018.

A central question in text mining and natural language processing is how to quantify what a document is about. Can we do this by looking at the words that make up the document? One measure of how important a word may be is its term frequency (tf), how frequently a word occurs in a document. There are words in a document, however, that occur many times but may not be important; in English, these are probably words like “the”, “is”, “of”, and so forth. We might take the approach of adding words like these to a list of stop words and removing them before analysis, but it is possible that some of these words might be more important in some documents than others. A list of stop words is not a sophisticated approach to adjusting term frequency for commonly used words. Another approach is to look at a term’s inverse document frequency (idf), which decreases the weight for commonly used words and increases the weight for words that are not used very much in a collection of documents. This can be combined with term frequency to calculate a term’s tf-idf, the frequency of a term adjusted for how rarely it is used. It is intended to measure how important a word is to a document in a collection (or corpus) of documents. It is a rule-of-thumb or heuristic quantity; while it has proved useful in text mining, search engines, etc., its theoretical foundations are considered less than firm by information theory experts.

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tf–idf - Wikipedia


Saved by uncleflo on December 23rd, 2018.

In information retrieval, tf–idf or TFIDF, short for term frequency–inverse document frequency, is a numerical statistic that is intended to reflect how important a word is to a document in a collection or corpus. It is often used as a weighting factor in searches of information retrieval, text mining, and user modeling. The tf–idf value increases proportionally to the number of times a word appears in the document and is offset by the number of documents in the corpus that contain the word, which helps to adjust for the fact that some words appear more frequently in general. Tf–idf is one of the most popular term-weighting schemes today; 83% of text-based recommender systems in digital libraries use tf–idf. Variations of the tf–idf weighting scheme are often used by search engines as a central tool in scoring and ranking a document's relevance given a user query. tf–idf can be successfully used for stop-words filtering in various subject fields, including text summarization and classification. One of the simplest ranking functions is computed by summing the tf–idf for each query term; many more sophisticated ranking functions are variants of this simple model.

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Refit for bluewater cruising


Saved by uncleflo on December 20th, 2018.

Richard and Roz Smith seem rather surprised to find themselves on board their Oyster 56, bobbing gently on a pontoon at Shamrock Quay, Southampton. It is the boat they have been refitting for the past nine months ahead of a “four-or-five-year” circumnavigation. They are surprised in part because the long, expensive fit-out work is finally drawing to a close (although there are winch bits on the saloon table and air-con ducting protruding from the panelling). But also surprised to be taking off for such an ambitious trip by themselves.

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