Sökning: "Christer Ahlström"

Hittade 5 avhandlingar innehållade orden Christer Ahlström.

  1. 1. The status of multilateral export control regimes : An examination of legal and non-legal agreements in international co-operation

    Författare :Christer Ahlström; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Law; RÄTTSVETENSKAP JURIDIK; LAW JURISPRUDENCE; RÄTTSVETENSKAP JURIDIK; Jurisprudence; Allmän rättslära;

    Sammanfattning : This thesis deals with the phenomenon of states concluding international agreements that are, explicitly or impliedly, of a non-legal character. It is first of all argued that states have the option under international law to conclude legally binding agreements or agreements that lack this quality. LÄS MER

  3. 2. Nonlinear phonocardiographic Signal Processing

    Författare :Christer Ahlström; Per Ask; Anders Johansson; Peter Hult; Pablo Laguna; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal analysis methods; computerized cardiac auscultation system; phonocardiographic PCG signal; mitral insufficiency MI ; time- and cost-saving; Medical engineering; Medicinsk teknik;

    Sammanfattning : The aim of this thesis work has been to develop signal analysis methods for a computerized cardiac auscultation system, the intelligent stethoscope. In particular, the work focuses on classification and interpretation of features derived from the phonocardiographic (PCG) signal by using advanced signal processing techniques. LÄS MER

  4. 3. Processing of the Phonocardiographic Signal : methods for the intelligent stethoscope

    Författare :Christer Ahlström; Per Ask; Leif Sörnmo; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Bioacoustics; phonocardiographic; signal processing; heart sound; lung sound; nonlinear dynamics; Medical technology; Medicinsk teknik;

    Sammanfattning : Phonocardiographic signals contain bioacoustic information reflecting the operation of the heart. Normally there are two heart sounds, and additional sounds indicate disease. If a third heart sound is present it could be a sign of heart failure whereas a murmur indicates defective valves or an orifice in the septal wall. LÄS MER

  5. 4. Intelligent Driver Mental State Monitoring System Using Physiological Sensor Signals

    Författare :Shaibal Barua; Peter Funk; Shahina Begum; Mobyen Uddin Ahmed; Christer Ahlström; Jose Peña; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Artificial Intelligent; Intelligent systems; Physiological signal; Driver monitoring; Computer Science; datavetenskap;

    Sammanfattning : Driving a vehicle involves a series of events, which are related to and evolve with the mental state (such as sleepiness, mental load, and stress) of the driv- er. These states are also identified as causal factors of critical situations that can lead to road accidents and vehicle crashes. LÄS MER

  7. 5. Multivariate Data Analytics to Identify Driver’s Sleepiness, Cognitive load, and Stress

    Författare :Shaibal Barua; Shahina Begum; Peter Funk; Mobyen Uddin Ahmed; Christer Ahlström; Nirmalie Wiratunga; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Driver monitoring; Driver state; Physiological signals; Machine learning; Contextual information; Computer Science; datavetenskap;

    Sammanfattning : Driving a vehicle in a dynamic traffic environment requires continuous adaptation of a complex manifold of physiological and cognitive activities. Impaired driving due to, for example, sleepiness, inattention, cognitive load or stress, affects one’s ability to adapt, predict and react to upcoming traffic events. LÄS MER