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Visar resultat 1 - 5 av 10 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Versio Svecana selectorum ex Paulinis epistolis locorum ad examen revocata dissertatione academica. Cujus part. XXIII. cons. ampliss. ordin. philos. Upsal. præside, mag. Johanne Flodero ... ventilandam sistit stipendiarius regius Carolus Åström, Jemtlandus. In audit. Gust. maj. d. XIX. Jun. a. MDCCLXXIX. H. a. m. s

   Författare :Johan Floderus; Carl Åström; Johan Floderus; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES;

   Sammanfattning : .... LÄS MER

3. 2. Investigation of Issues Related to Electrical Efficiency Improvements of Pump and Fan Drives in Buildings

   Författare :Johan Åström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnet motor; efficiency measurement; frequency converter; HVAC load profiles and saving potential; loss model; Induction motor;

   Sammanfattning : This thesis deals with issues related to efficiency of building related pump and fan drive systems. Different motor technologies are analyzed and a more detailed study oninverter fed Induction Machines (IM) is presented. LÄS MER

4. 3. Investigation of Issues Related to Electrical Energy Efficiency of Pump and Fan Drives in Buildings

   Författare :Johan Åström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This thesis deals with issues regarding energy efficiency of building related pump andfan drive systems. Different Induction Motor (IM) and permanent magnet motor drivesystems are analyzed with focus on energy efficiency. LÄS MER

5. 4. Microbial Risks in Surface Water Sources

   Författare :Johan Åström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Surface water; Bifidobacteria; Microbial source tracking; Cryptosporidium.; QMRA; Flow-weighted sampling; Pathogens; Bacteroidales; Stochastic modelling; qPCR;

   Sammanfattning : Microbial risks need to be properly handled for the provision of healthy drinking water. The mitigation of pathogens in the water source lowers the risk for infection associated with nominal and suboptimal drinking water treatment. LÄS MER

7. 5. Wastewater discharges and microbial variability in a surface water source

   Författare :Johan Åström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; faecal indicators; pathogens; drinking-water; microbial risk assessment; variability; rainfall; catchment; wastewater; surface water; Hazardous events;

   Sammanfattning : Planning for drinking-water safety in surface waters includes a systematic assessment of hazards in the catchment, and microbial contamination is considered a major health risk. The aim of this thesis was to identify and characterize microbial hazardous events reported for River Göta älv, Sweden. LÄS MER