Human interface guidelines (HIG) are software development documents which offer application developers a set of recommendations. Their aim is to improve the experience for the users by making application interfaces more intuitive, learnable, and consistent. Most guides limit themselves to defining a common look and feel for applications in a particular desktop environment. The guides enumerate specific policies. Policies are sometimes based on studies of human–computer interaction (so called usability studies), but most are based on conventions chosen by the platform developers preferences.

Scope

InHuman interface guidelines often describe the visual design rules, including icon and window design and style. Much less frequently, they specify how user input and interaction mechanisms work. Aside from the detailed rules, guidelines sometimes also make broader suggestions about how to organize and design the application and write user-interface text.

HIGs are also done for applications. In this case the HIG will build on a platform HIG by adding the common semantics for a range of application functions.

“Whether you are a developer or a designer, these guidelines contain everything you need to design effective applications using GTK. They cover design principles for GNOME 3, common guidelines such as how to write text and use images and icons, as well as a library of design patterns which you can use in your application.”

These guidelines are designed to help developers and designers create a beautifully consistent experience on the elementary OS desktop. They were written for interface designers, graphic artists and software developers who will be working on elementary OS. They will not only define specific design elements and principles, but will also instill a philosophy that will help you decide when it is appropriate to deviate from the Guidelines. Adhering to the suggestions contained here will provide many benefits:

• Users will learn to use your application faster, because it shares common elements that they are already familiar with.
• Users will accomplish tasks more quickly, because you will have a straight-forward interface design that isn't confusing or difficult.
• Your application will appear native to the desktop, and share the same elegant look as default applications.
• Your application will be easier to document, because an expected behavior does not require explanation.
• The amount of support you will have to provide, including bugs filed, will be lessened (for the reasons above).

To help you achieve these goals, these guidelines will cover basic interface elements, how to use them and put them together effectively, and how to make your application integrate well with the desktop. The most important thing to remember is that following these guidelines will make it easier to design a new application, not harder.

Mr Musk has also put billions into batteries, for Teslas and to balance the electric grid. The minerals inside them are the preserve of our second tycoon, Robert Friedland. His brash style and early mining investments earned him the nickname “toxic Bob” from the press. But his investments in battery metals, made through holdings like Ivanhoe Mines, make him look greener today. He is digging up cobalt and nickel in Australia, and developing what could be the world’s second-biggest copper mine in Africa. His joint-venture with Chinese investors is working on metal sulphates for lithium-ion cells.

Wang Chuanfu is the closest China has to Mr Musk. BYD, the company he founded in 1995, started out making rechargeable batteries. Today its sprawling campus in Shenzhen shows off solar cells, electric cars, heavy machinery, mobile-phone components and much else besides that needs energy storage. In 2008 Warren Buffett’s Berkshire Hathaway invested $232m in BYD. The stake is now worth over $1.5bn. BYD’s sales surpassed $18bn last year, putting it among the biggest makers of batteries and electric cars.

Human Interface Guidelines

The Economist

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Transcript

Thank you and congrats.

Congrats again to the 29 developers who committed tremendous time and energy to build the beautiful iOS apps presented at Demo Day.

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Special thanks to the many hundreds of engineers, technologists, and entrepreneurs who volunteer their time to teach, mentor, and inspire our students.

Get involved

In addition to our amazing iOS cohort, we have talented 27 Android developers who are excited to join the tech community. Get in touch if your company is looking to hire a mobile developer.

Using MathJax for Mathematics

In physics, mass–energy equivalence is the relationship between mass and energy in a system’s rest frame, where the two values differ only by a constant and the units of measurement. The principle is described by the physicist Albert Einstein's famous formula:

$$e=mc^2$$

The Jacobian matrix of the function \(\mathbf{f}(x_1, \dots, x_n)\)

$$ \mathbf{J} = \frac{d \mathbf{f}}{d \mathbf{x}} = \left[ \frac{\partial \mathbf{f}}{\partial x_1} \cdots \frac{\partial \mathbf{f}}{\partial x_n} \right] = \begin{bmatrix} \frac{\partial f_1}{\partial x_1} & \cdots & \frac{\partial f_1}{\partial x_n} \\ \vdots & \ddots & \vdots \\ \frac{\partial f_m}{\partial x_1} & \cdots & \frac{\partial f_m}{\partial x_n} \end{bmatrix} $$

Google Presentation

For sections that have not yet been written, please refer to The GNU Network Object Model Environment.

William Henry Gates III (born October 28, 1955) is an American business magnate, software developer, investor, author, landowner and philanthropist. He is a co-founder of Microsoft Corporation. During his career at Microsoft, Gates held the positions of chairman, chief executive officer (CEO), president and chief software architect, while also being the largest individual shareholder until May 2014. He is considered one of the best known entrepreneurs of the microcomputer revolution of the 1970s and 1980s.

Cross—platform guidelines

In contrast to platform-specific guidelines, cross-platform guidelines aren't tied to a distinct platform. These guidelines make recommendations which should be true on any platform. Since this isn't always possible, cross-platform guidelines may weigh the compliance against the imposed work load.

However, keep in mind that this is a guideline, not a rulebook.^[1][2][1][2] New, amazing interaction paradigms appear every day and more are waiting to be discovered. This is a living document that can and will be changed.