Nonconductive specimens collect charge when scanned by the electron beam, and especially in secondary electron imaging mode, this causes scanning faults and other image artifacts. For conventional imaging in the SEM, specimens must be electrically conductive, at least at the surface, and electrically grounded to prevent the accumulation of electrostatic charge. Metal objects require little special preparation for SEM except for cleaning and conductively mounting to a specimen stub. Non-conducting materials are usually coated with an ultrathin coating of electrically conducting material, deposited on the sample either by low-vacuum sputter coating or by high-vacuum evaporation. Conductive materials in current use for specimen coating include gold, gold/palladium alloy, platinum, iridium, tungsten, chromium, osmium, and graphite. Coating with heavy metals may increase signal/noise ratio for samples of low atomic number (Z). The improvement arises because secondary electron emission for high-Z materials is enhanced.
When a search engine user in the targeted area searches for the keywords or keyphrases that you chose, your ad enters an immediate online auction. Your ad is displayed when it matches bid and relevancy criteria, so you want to make sure that you have an appropriate budget size, and that you are bidding on keyphrases relevant to your products/services (such as those indicated on your website or landing page). You are not charged when your ad is displayed, but rather when someone clicks on your ad to take further action.
Maintenance. Ongoing addition and modification of keywords and website content are necessary to continually improve search engine rankings so growth doesn’t stall or decline from neglect. You also want to review your link strategy and ensure that your inbound and outbound links are relevant to your business. A blog can provide you the necessary structure and ease of content addition that you need. Your hosting company can typically help you with the setup/installation of a blog.
Of course, you can also include shorter content on YouTube as well, especially if your content is in YouTube’s ad format – viewers don’t have much patience to wait through ads on YouTube, and will often skip ads as soon as they are able. This is your opportunity to use the short-form content you’ve created that jumps immediately into your message and entices viewers to keep watching right from the first second.
1. The big picture. Before you get started with individual tricks and tactics, take a step back and learn about the “big picture” of SEO. The goal of SEO is to optimize your site so that it ranks higher in searches relevant to your industry; there are many ways to do this, but almost everything boils down to improving your relevance and authority. Your relevance is a measure of how appropriate your content is for an incoming query (and can be tweaked with keyword selection and content creation), and your authority is a measure of how trustworthy Google views your site to be (which can be improved with inbound links, brand mentions, high-quality content, and solid UI metrics).
7. Keyword research. Specific target keywords aren’t as important for SEO success as they used to be, now that Google search is fueled by semantic and contextual understanding, but you should still be able to identify both head keyword (short, high-volume keywords) and long-tail keyword (longer, conversational, low-volume keywords) targets to guide the direction of your campaign. http://m.youtu.be/7bNPg8UbhaE