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| 2. |
- Magnusson, Håkan, et al.
(författare)
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A compact dual-band power amplifier driver for 2.4GHz and 5.2GHz WLAN transmitters
- 2007
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Ingår i: Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium. - 9781424405305 ; , s. 83-86
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Konferensbidrag (refereegranskat)abstract
- This paper presents a dual-band power amplifier (PA) driver with matched output operating in the 2.4 GHz and 5.2 GHz ISM bands. The use of tunable differential inductors both in the RF choke and the matching circuit saves significant die-area compared to traditional configurations of integrated PA drivers. The fabricated circuit size is as small as 0.48 mm 2 for the used 0.18 mu m CMOS process, saving about 0.5 mm(2) silicon area. Measurement results show that the circuit achieves 10.4 dB gain and a maximum output power of 13 dBm at 2.4 GHz while the gain is 5.1 dB and maximum output power is 8.7dBm at 5.2 GHz. The circuit dissipates 13mA from a 1.8V supple.
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| 3. |
- Magnusson, Håkan, et al.
(författare)
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A cross-coupled dual-loop feedback power amplifier driver
- 2005
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Ingår i: Proceedings of the 2005 European Conference on Circuit Theory and Design. - 0780390660 - 9780780390669 ; , s. 309-312
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Konferensbidrag (refereegranskat)abstract
- This paper presents a wide-band power amplifier (PA) driver with matched output. A dual-loop cross-coupled feedback is applied on a simple two stage core amplifier. The use of a dual-loop feedback provides a broad-band 50 Ω output match without the use of any area consuming matching networks. The PA driver exhibits a gain higher than 6.4 dB, more than +1.9dBm 1-dB compression point with S22 less than -22 dB at the output, while dissipating 42 mA from a 1.8V supply. The output IP3 is better than +13.9 dBm at 2.4 GHz.
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| 4. |
- Magnusson, Håkan, et al.
(författare)
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Multiband multi-standard transmitter using a compact power amplifier driver
- 2005
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Ingår i: 2005 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, Digest of Papers. - NEW YORK, NY : IEEE. - 0780389832 ; , s. 491-494
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Konferensbidrag (refereegranskat)abstract
- This paper presents a multistandard transmitter solution using a new power amplifier (PA) driver [1] operating in the broadcast, mobile, and the 2&5 GHz ISM bands. The use of dual-loop feedback in the driver provides a matched output without area consuming matching networks. The circuit size is as small as 0.3 mm(2) for the used 0.18 mu m CMOS process, saving about 0.7 mm(2) silicon area. Measurement results show a gain higher than 7.8 dB with a maximum output power of +4 dBm for all bands and using a supply voltage of 1.8V.
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| 6. |
- Moll, Ulrika, et al.
(författare)
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Pregnancies in prediabetic women
- 2008
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Ingår i: Diabetologia. - : Springer Science and Business Media LLC. - 1432-0428 .- 0012-186X. ; 51:S1, s. 467-468
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Konferensbidrag (refereegranskat)
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| 7. |
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| 8. |
- Abalo, Ernesto, et al.
(författare)
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Emerging Patterns of Inclusion and Exclusion in the Era of E-government : A Study of Users of ‘Swedish Public Employment Service’ on the Internet
- 2008
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Ingår i: Media and Global Divides. - Stockholm : Organizing Committee for the IAMCR Congress 2008. - 918835430X ; , s. 44-45
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Konferensbidrag (refereegranskat)abstract
- In the area of governmental information for and services to citizens digitalization has certainly become a buzzword. Framed within the discourses on e-government or e-governance – or different mixtures of the two – various analyses have tried to point out, or even anticipate possible consequences of the appropriation of digital technologies, mainly the internet, in governmental services.On the one hand, these analyses have pointed out a great deal of opportunities connected to the incorporation of the internet into governmental information and services. Policy makers have been quick to point to the increased accessibility as a great opportunity for the citizens; in Sweden this vision of accessibility has even been referred to as ‘24:7-governmental agencies’. Academics, among others, have also suggested that the digitalization of information and services opens up new possibilities for citizen control of governments.On the other hand, a number of problems have also been identified. For instance, the digitalization of public registers holding personal information has been interpreted as a threat to the citizens’ integrity: Will digitalization bring a new surveillance society? The most frequently debated problem, however, at least within research, has been the fear of digital divides. Will the internet create digital cleavages between different groups of citizens?So far, however, neither the hopeful nor the dystopian analyses have made enough efforts to critically evaluate their claims. Such evaluations can start from different points of departure, and in this paper the starting point is the citizens as users of governmental information and services through the internet: What patterns of inclusion and exclusion emerge as a governmental agency digitalizes its information and services by making them increasingly internet based?The paper presents statistical data from a survey of 762 unemployed citizens using the Swedish Public Employment Service, a governmental agency that has come to rely specifically heavy on internet based information and service. The initial analysis of data reveals interesting differences between social groups in terms of both perception and use of the internet – in general – and the resources offered by SPES in particular. For instance, the users’ various degrees of education is a strong, determining factor when it comes to use of internet SPES’ services.The paper starts from a conceptual elaboration of various notions of e-government and e-governance. Thereafter, the survey data is described and elaborated on before moving into a discussion of the wider significance of the findings: What does data suggest in terms of patterns of inclusion in and exclusion from a society in which governmental agencies, to an increasing extent, use the internet for their information and services?
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| 9. |
- Ahrens, Wolfgang, et al.
(författare)
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Occupational exposure to endocrine-disrupting compounds and biliary tract cancer among men
- 2007
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Ingår i: Scandinavian Journal of Work, Environment and Health. - : Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 33:5, s. 387-396
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Tidskriftsartikel (refereegranskat)abstract
- Objectives This study investigated the association between cancer of the extrahepatic biliary tract and exposure to endocrine-disrupting compounds. Methods Altogether 183 men with histologically confirmed carcinoma of the extrahepatic biliary tract and 1938 matched controls were interviewed between 1995 and 1997 in the frame of an international multicenter case-control study in six European countries (Denmark, France, Germany, Italy, Spain, and Sweden). Selfreported job descriptions were converted to semiquantitative variables (intensity, probability, and duration of exposure) for 14 endocrine-disrupting compounds. The cases were compared with 1421 population controls and 517 colon adenocarcinoma patients. Odds ratios (OR) and 95% confidence intervals (95% CI) were obtained with unconditional logistic regression and adjusted for age, country, and gallstones. Results Occupational exposure to endocrine-disrupting compounds resulted in an OR of 1.4 (95% CI 1.0-2. 1) with no dose-effect relationship for cumulative exposure (low: OR 1.3, 95% CI 0.6-3.0; medium: OR 1.5, 95% CI0.8-2.7; high: OR 1.4, 95% CI 0.9-2.4) (only index participants). The elevated risk was restricted to extrahepatic bile ducts and ampulla Vateri (OR 1.7, 95% CI 1.0-2.6). The adjusted OR for cancer of the extrahepatic biliary tract after exposure to polychlorinated biphenyls was 2.8 (95% CI 1.3-5.9, only index participants). Conclusions The data show some associations between exposure to endocrine-disrupting compounds in the workplace and the risk for cancer of the extrahepatic biliary tract among men, particularly for the extrahepatic bile duct and ampulla of Vater. Polychlorinated biphenyls could possibly be a strong risk factor.
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| 10. |
- Ahrens, Wolfgang, et al.
(författare)
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Risk factors for extrahepatic biliary tract carcinoma in men: medical conditions and lifestyle: results from a European multicentre case-control study
- 2007
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Ingår i: European Journal of Gastroenterology and Hepathology. - 1473-5687. ; 19:8, s. 623-630
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: To identify risk factors of carcinoma of the extrahepatic biliary tract in men. METHODS: Newly diagnosed and histologically confirmed patients, 35-70 years old, were interviewed between 1995 and 1997 in Denmark, Sweden, France, Germany and Italy. Population controls were frequency-matched by age and region. Adjusted odds ratios and 95%-confidence intervals were estimated by logistic regression. RESULTS: The analysis included 153 patients and 1421 controls. The participation proportion was 71% for patients and 61% for controls. Gallstone disease was corroborated as a risk factor for extrahepatic biliary tract carcinoma in men (odds ratio 2.49; 95% confidence interval 1.32-4.70), particularly for gall bladder tumors (odds ratio 4.68; 95% confidence interval 1.85-11.84). For a body mass index [height (m) divided by squared weight (kg2)] >30 at age 35 years, an excess risk was observed (odds ratio 2.58; 95% confidence interval 1.07-6.23, reference: body mass index 18.5-25) that was even stronger if the body mass index was >30 for the lowest weight in adulthood (odds ratio 4.68; 95% confidence interval 1.13-19.40). Infection of the gall bladder, chronic inflammatory bowel disease, hepatitis or smoking showed no clear association, whereas some increase in risk was suggested for consumption of 40-80 g alcohol per day and more. CONCLUSIONS: Our study corroborates gallstones as a risk indicator in extrahepatic biliary tract carcinoma. Permanent overweight and obesity in adult life was identified as a strong risk factor for extrahepatic biliary tract carcinoma, whereas we did not find any strong lifestyle-associated risk factors. Inconsistent results across studies concerning the association of extrahepatic biliary tract carcinoma with overweight and obesity may be explained by the different approaches to assess this variable.
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