Search for dissertations about: "concave"

Showing result 1 - 5 of 69 swedish dissertations containing the word concave.

2. 1. Performing Punk : Subcultural Authentications and the Positioning of the Mainstream

   Author : Erik Hannerz; Tora Holmberg; Philip Lalander; Uppsala universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; subculture; punk; mainstream; authentication; style; identity; cultural sociology; ethnography; convex; concave; patterns of meaning; Sociologi; Sociology;

   Abstract : This thesis is about how and in opposition to what punk is defined and lived out by punks in Sweden and Indonesia. Arguing against the previous research’s presumption that subcultural meaning constitutes a single set of meaning, this study points to two patterned sets of meanings, each constructed out of several different definitions of the mainstream as well as the subcultural authentic. READ MORE

4. 2. Weighted Hardy-type inequalities on the cones of monotone and quasi-concave functions

   Author : Olga Popova; Mikhail Goldman; Luleå tekniska universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

   Abstract : This PhD thesis deals with weighted Hardy-type inequalities restricted to cones of monotone functions and quasi-monotone functions.The thesis consists of four papers (papers A, B, C and D) and an introduction, which gives an overview of this specific field of functional analysis and also serves to put these papers into a more general frame. READ MORE

5. 3. Improvements of SPECT by a new collimator design and simultaneous transmission-emission tomography

   Author : Shahrokh Kimiaei; Marija Ivanovic; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gamma camera; SPECT; Emission tomography; Transmission tomography; Planar-concave collimators; Spatial resolution; Other physics; Övrig fysik; medicinsk strålningsfysik; Medical Radiation Physics;

   Abstract : SPECT (Single Photon Emission Computed Tomography) and planar scintigraphy are the most established and world wide-spread nuclear medicine imaging techniques for clinical use today. SPECT is a tomographic technique that allows 3-D visualization of biochemical processes or physiological flow in the human body by external detection of photons from an administered radiopharmaceutical. READ MORE

6. 4. Integrated Sensing and Communication in Cell-Free Massive MIMO

   Author : Zinat Behdad; Cicek Cavdar; Ki Won Sung; Özlem Tugfe Demir; Huseyin Arslan; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Integrated sensing and communication; cell-free massive MIMO; power allocation; URLLC; C-RAN; convex-concave programming.; Integrerad avkänning och kommunikation; cellfri massiv MI- MO; effektallokering; URLLC; C-RAN; konvex-konkav programmering;

   Abstract : Future mobile networks are anticipated to not only enhance communication performance but also facilitate new sensing-based applications. This highlights the essential role of integrated sensing and communication (ISAC) in sixth-generation (6G) and beyond mobile networks. READ MORE

7. 5. Millimeter-Wave Communications for Indoor Dense Spaces : Channel Modeling and Network Deployment

   Author : Ozan Alp Topal; Cicek Cavdar; Emil Björnson; Ahmed Alkhateeb; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter wave communication; ray-tracing; channel modeling; access point deployment; convex-concave programming; reconfigurable intelligent surfaces.; Millimetervågsteknik; ray-tracing; kanalmodellering; accesspunktsutbyggnad; konvex-konkav programmering; omkonfigurerbara intelligenta yto; Informations- och kommunikationsteknik; Information and Communication Technology; Telecommunication; Telekommunikation;

   Abstract : In the ever-evolving landscape of wireless communication, the deployment of millimeter-wave (mmWave) technology has emerged as a game-changer for indoor environments. As the demand for high-speed, low-latency connectivity continues to surge, especially in densely populated areas, mmWave access point deployment has gained prominence due to its ability to deliver unprecedented data rates thanks to the available wide bandwidths. READ MORE