Sökning: "SIP"

Visar resultat 1 - 5 av 60 avhandlingar innehållade ordet SIP.

  1. 1. Towards Secure SIP Signalling Service for VoIP applications : Performance-related Attacks and Preventions

    Författare :Ge Zhang; Simone Fischer-Hübner; Costas Lambrinoudakis; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SIP; VoIP; Security; Computer science; Datavetenskap; Datavetenskap; Computer Science;

    Sammanfattning : Current Voice over IP (VoIP) services are regarded less secure than the traditional public switched telephone network (PSTN). This is due to the fact that VoIP services are frequently deployed in an relatively open environment so that VoIP infrastructures can be easily accessed by potential attackers. LÄS MER

  3. 2. Samordnad individuell plan (SIP) : Professionellas samt barn och föräldrars erfarenheter

    Författare :Erik Nordström; Sofia Kjellström; Berith Hedberg; Iréne Josephson; Johan Berlin; Jönköping University; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Introduktion. Många barn och unga idag har så pass komplexa behov att de behöver samtidiga insatser från olika huvudmän. Insatserna blir alltmer specialiserade och fragmenterade, vilket kräver att professioner inom hälso- och sjukvård, socialtjänst och skola samverkar. LÄS MER

  4. 3. Unwanted Traffic and Information Disclosure in VoIP Networks : Threats and Countermeasures

    Författare :Ge Zhang; Simone Fischer-Huebner; Costas Lambrinoudakis; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SIP; VoIP; security; Denial of Service; Vulnerability analysis; timing attacks; Spam; DTMF; SIP; RTP; Computer Science; Datavetenskap;

    Sammanfattning : The success of the Internet has brought significant changes to the telecommunication industry. One of the remarkable outcomes of this evolution is Voice over IP (VoIP), which enables realtime voice communications over packet switched networks for a lower cost than traditional public switched telephone networks (PSTN). LÄS MER

  5. 4. A Mobile Agent Based Service Architecture for Internet Telephony

    Författare :Roch H. Glitho; KTH; []
    Nyckelord :service architecture; mobile agent; SIP; H.323; IN; software upgrading; partitioning; multiparty event scheduling;

    Sammanfattning : Internet Telephony defined as real time voice or multimediacommunications over packet switched networks dates back to theearly days of the Internet. ARPA's Network SecureCommunications project had implemented, as early as December1973, an infrastructure for local and transnet real time voicecommunication. Two main sets of standards have emerged: H. LÄS MER

  7. 5. Cervical Radiculopathy. Effects of Surgery, Physiotherapy or Cervical Collar. A prospective, randomised study

    Författare :Liselott Persson; Neurokirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; headache.; posturography; neck mobility; strength; SIP; randomised trial; cervical collar; physiotherapy; anterior cervical fusion; Cervical radiculopathy; neck pain; Neurology; neuropsychology; neurophysiology; Neurologi; neuropsykologi; neurofysiologi;

    Sammanfattning : The efficacy of surgery, physiotherapy or a cervical collar in the treatment of chronic cervicobrachial pain of radicular origin was evaluated in a prospective, randomised study comprising 81 patients of both sexes, 28-64 years of age, referred for possible neurosurgical treatment. After neurological and radiological examination and giving their informed consent, they were randomised to one of the three treatments. LÄS MER