1091. |
|
|
1092. |
|
|
1093. |
|
|
1094. |
|
|
1095. |
- Persson, Anders
(författare)
-
Disciplin och motmakt
- 1990
-
Ingår i: Helsingborgs Dagblad. - 1103-9388. ; :1990-01-12
-
Recension (populärvet., debatt m.m.)
|
|
1096. |
- Persson, Anders, 1982-, et al.
(författare)
-
Disrupting Blood Gas Analysis, Path to Rapid, Gentle and Continuous Monitoring : DBGA
- 2020
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- For prematurely born children, yearly amounting to 15 million, monitoring of CO2 content in the blood is vital. Clinically, either ablood sample is taken, limiting the number of measurements and delaying the information, or a method detecting the gas escapingthrough the skin on heating it, is used. The latter poses severe risks of injury either by the heat itself or from skin rupturing onremoving the sensor. Here, a truly non-invasive concept has been fully prototyped and benchmarked. It allows for continuous, nonlagging,measurements of a quality seemingly outperforming state-of-the-art equipment, also on body parts previously considereddisqualified.
|
|
1097. |
- Persson, Anders, 1975
(författare)
-
Diversity and Interference Aspects in the Downlink of Code Division Multiple Access Systems
- 2004
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis consists of six included papers and technical reports, plus an introduction. The topic studied is interference and diversity aspects in code division multiple access (CDMA) systems for mobile cellular communications. The focus in the papers is on the downlink - the communication link from the base station to the mobile terminal. A performance limiting factor in the downlink of single-carrier CDMA systems is multiple access interference due to lost orthogonality on the time-dispersive radio channel. On such channels, orthogonal frequency division multiplexing (OFDM) is a very powerful technique and, recently, several proposals of CDMA for OFDM systems have been made. Although some results for single-carrier systems are provided (paper A), it is to the area of OFDM-CDMA that the main contributions of this thesis are made (papers B-F). In the included papers, low-complexity single-user detectors are assumed. In agreement with existing results, it is concluded that direct-sequence spreading in OFDM systems is beneficial when the number of active users is low compared to the length of the spreading codes used, i.e., for low system loads. However, assuming a single-cell scenario and a channel code of a sufficiently large free distance, it is at high system loads concluded that coded orthogonal frequency division multiplexing access (OFDMA) outperforms all the considered direct-sequence schemes. This is most clearly the case in a near-far scenario - a situation that naturally will occur in the downlink due to the requirement for different transmit powers for different users. It is also concluded that coded OFDMA achieves essentially the same robustness against inter-cell interference as schemes that use direct-sequence spreading. If a low complexity detector is required, the results presented in this thesis indicate that coded OFDMA is a competitive candidate for the downlink of mobile cellular systems.
|
|
1098. |
- Persson, Anders
(författare)
-
Does Netanyahu really believe in democracy? : Global freedom experts aren't sure
- 2020
-
Ingår i: Haaretz. - Jerusalem : Haaretz Daily Newspaper Ltd.. ; :2020-03-29
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Tunisia speeds past Israel’s ailing democracy, even before COVID-19. Netanyahu has ‘anti-democratic tendencies.’ Hungary and Poland protect civil liberties better: How the big three democracy indexes assess Israel.
|
|
1099. |
- Persson, Anders, et al.
(författare)
-
Drogförebyggande arbete i skolan : möjligheter och dilemman
- 2005
-
Bok (övrigt vetenskapligt/konstnärligt)abstract
- Skolan är en organisation som vi alla har erfarenheter av, men det är också en institution som vi förväntar oss mycket av. När den ständigt lika aktuella narkotikapolitiska ambitionen om ett narkotikafritt samhälle ska omsättas till handling, är skolan en given arena för det förebyggande arbetet. I denna bok problematiserar vi skolans möjligheter att bedriva ett drogförebyggande arbete. Vi visar de dilemman som finns när ambitioner av olika slag ska förenas i en vardag där förutsättningarna skiljer sig mellan skolor och mellan de personer som möts i skolans värld. Utifrån ett kritiskt perspektiv presenterar vi uppfattningar av såväl möjligheter som dilemman, och med hjälp av berättelser från personal och elever visar vi på variationen i skolans vardag. Boken vänder sig till beslutsfattare, rektorer, lärare och annan personal inom skola och inom socialt arbete av olika slag, liksom till studenter på pedagogiska och sociala utbildningar.
|
|
1100. |
|
|