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shell

(shel),
An outer covering.

shell

(shel)
An outer covering.

shell

any hard outer covering, such as the carapace of turtles and tortoises, the exoskeleton of crustaceans, the calcareous plates of echinoderms, the outermost membranes of an egg, the skeleton of Foraminifera or the mantle secretions of molluscs.

impression, eye

A negative form or replica of the anterior part of the eye. A substance with rapid gelling properties is held in contact with the eye until gelled. This impression (or mould) is then used in the preparation of a positive model called a cast (or casting) of the anterior part of the eye: it is made by filling the impression with a material containing a plaster of Paris base which hardens to artificial stone. Using this cast a shell of a scleral contact lens is produced with optimum shape of the back surface. Syn. impression; impression moulding; mould; ocular impression.
References in periodicals archive ?
"By leveraging trusted applications or gaining access to native system operating tools such as PowerShell or JavaScript, attackers have made the development leap forward to take control of computers without downloading any executable files, at least in the initial stages of the attack."
The use of obfuscated PowerShell commands increased 50% from last quarter, partly due to contributions by Emotet.
The company saw on average eight new threat samples per second, and the increasing use of fileless malware attacks leveraging Microsoft PowerShell.
It also downloads additional information using a PowerShell script.
The macro ran a PowerShell command that attempted to download additional
"The downloaded executable turned out to be a malicious binary that launched PowerShell scripts bundled with the Meterpreter reverse shell, which granted the remote attacker silent control.
Afterwards more of the company's software followed, including Chakra Javascript engine, Xamarin, the Computational Networks Toolkit for deep learning application, Visual Studio's MSBuild compiling engine and, most recently, PowerShell.
Each lesson includes a list of skills, screenshots, key terms, certification objectives, sidebars on using Windows PowerShell, step-by-step exercises, skill summaries, business case scenarios, assessments, and online lab work.
HDInsight provides all of the benefits of the cloud: full elasticity, strong security through dedicated Azure Secure Nodes, and easy management through PowerShell scripting.
It covers PowerShell and Server Manager and also provides an introduction to the new IPv6 networking protocol.
The new GitHub app features all the Git command line tools, and even comes with support for PowerShell - which is Microsoft's answer to Linux's much better command line shell.
SysTrack OpenAPI is also available as a PowerShell API suitable for system administrators.