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The physician of a 62-year-old woman noticed this nail discoloration and referred her for dermoscopic evaluation to rule out melanoma. Bluish-white color and irregular streaks diagnose nail apparatus nodular melanoma. Cuticular mega-capillary loops confirm the diagnosis of melanoma. Bluish-white color and irregular streaks diagnose a malignant blue nevus. Bluish-white homogeneous color, well-demarcated lateral and proximal borders, and a purplish filamentous distal border diagnose a subungual hemorrhage. 5. Bluish-white color rules out a subungual hemorrhage. 1. 2. 3. 4.

Quality of Service (QoS)

During hypoxic stress, where is fetal blood preferentially shunted How is feto-placental perfusion assessed with doppler ultrasound

When you remove fear from the situation, an amazing thing happens the answers you are seeking come sharply into focus, and so does your self-image.

SaaS can be deployed both internally and externally. External use is especially appealing to IT professionals, because it takes work off their shoulders. They are able to focus more on their work, which one would hope is to generate a competitive advantage in their marketplace, rather than on simply maintaining servers and responding when servers fail.

NetScaler caching can reduce the load on the entire server infrastructure. Data provided by the NetScaler cache does not need processing by a web server, app server, or data base server. NetScaler can do RFC-compliant caching. These are conservative rules that assure no client ever gets stale data. NetScaler also provides a dynamic caching feature that lets a customer who knows the application and the way the enterprise uses the application to aggressively exploit this knowledge to improve performance. Dynamic caching enables the customer to set rules for cacheability that go beyond RFC compliance to allow caching of frequently accessed data that, while technically dynamic, is infrequently changed.

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Given that a proxy both receives requests and sends requests, it incorporates both server and client functionality. Figure 5-3 shows an example of the operation of a proxy server. It does not take much imagination to realize how this type of functionality can be used for call forwarding, time-of-day routing, or follow-me services. For example, if the message from the caller to Collins in Figure 5-3 is an invitation to participate in a call, the net effect is that the call is forwarded to Collins at home. Of course, it is necessary that the proxy be aware that Collins happens to be at home instead of at work. A redirect server is a server that accepts SIP requests, maps the destination address to zero or more new addresses, and returns the new address to the originator of the request. Thereafter, the originator of the request can send requests directly to the address(es) returned by the redirect server. A redirect server does not initiate any SIP requests of its own. Figure 5-4 shows an example of the operation of a redirect server. This can be another means of providing the call-forwarding/follow-me service that can be provided by a proxy server. The difference is that, in the case of a redirect server, the originating client does the actual forwarding of the call. The redirect server simply provides the information necessary to enable the originating client to correctly route the call, after which the redirect server is no longer involved. A user-agent server accepts SIP requests and contacts the user. A response from the user to the user-agent server results in a SIP response on behalf of the user. In reality, a SIP device (such as a SIP-enabled telephone) will function as both a user-agent client and a user-agent server. Acting as a user-agent client, it is able to initiate SIP requests. Acting as a user-agent