162,187 research outputs found
Elektronism : en flerårig resa genom tolv månader
No full textTemat i boken Elektronism ligger i tiden. Staffan Holmbring och J Jacob Wikner gör en tidsresa genom året. Funderingar kopplas ihop med månadernas karaktär. Naturvetenskapliga och filosofiska tankar uppstår och läsaren får följa dem under tidsresans gång. Elektronism tar vid där vår frågvishet slutar. Holmbring och Wikner ställer frågor på ett enkelt vis. Varför är vatten blött? Varför blir det aldrig blötare av att vattna på vatten?Elektronism är en fristående fortsättning där den förra boken Elektrosofi slutade. Resan har nu fortsatt från geografiska stopp till stopp i vår kalender. Staffan Holmbring är teknisk doktor i tillämpad fysik från Linköpings universitet. Kompetensen han fick därifrån har han bland annat använt i de företag som han har drivit från 80-talet med verksamheter inom tillämpad fysik och integrerad elektronik. Mycket intresserar honom utanför det naturvetenskapliga skrået, främst litteratur, filosofi och bildkonst. J Jacob Wikner är uppväxt i Borgholm, Öland. Dagarna fylls ofta med föreläsningar, kretskonstruktion och forskningsprojekt som spänner från den afrikanska landsbygden via kroppens elektriska signaler till röntgendetektorer. Intressena för en teknisk doktor, docent och biträdande professor kan vara många.</p
Frequency Compensation of High-Speed, Low-Voltage CMOS Multistage Amplifiers
No full textAamir SA, Harikumar P, Wikner JJ. Frequency Compensation of High-Speed, Low-Voltage CMOS Multistage Amplifiers. In: 2013 IEEE International Symposium on Circuits and Systems (ISCAS2013). Piscataway, NJ: IEEE; 2013: 381-384.This paper presents the frequency compensation of high-speed, low-voltage multistage amplifiers. Two frequency compensation techniques, the Nested Miller Compensation with Nulling Resistors (NMCNR) and Reversed Nested Indirect Compensation (RNIC), are discussed and employed on two multistage amplifier architectures. A four-stage pseudo-differential amplifier with CMFF and CMFB is designed in a 1.2 V, 65-nm CMOS process. With NMCNR, it achieves a phase margin (PM) of 59° with a DC gain of 75 dB and unity-gain frequency (fug) of 712 MHz. With RNIC, the same four-stage amplifier achieves a phase margin of 84°, DC gain of 76 dB and fug of 2 GHz. Further, a three-stage single-ended amplifier is designed in a 1.1-V, 40-nm CMOS process. The three-stage OTA with RNIC achieves PM of 81°, DC gain of 80 dB and fug of 770 MHz. The same OTA achieves PM of 59° with NMCNR, while maintaining a DC gain of 75 dB and fug of 262 MHz. Pole-splitting, to achieve increased stability, is illustrated for both compensation schemes. Simulations illustrate that the RNIC scheme achieves much higher PM and fug for lower values of compensation capacitance compared to NMCNR, despite the growing number of low voltage amplifier stages
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Register-based studies of delivery outcome after maternal use of some common drugs
No full textThis thesis aimed to study neonatal outcome including the presence of congenital malformations and to describe maternal characteristics for women using some common drugs during pregnancy. Drugs used in one benign condition (nausea and vomiting) and one chronic disease (hypothyroidism) and the CNS-active drugs benzodiazepines and hypnotic benzodiazepine receptor agonists were selected.The studies were based on the Swedish Medical Birth Register (MBR). The main advantages with MBR are that relatively large numbers of exposed women and their infants can be identified (coverage 98- 99% of deliveries in Sweden). Drug exposure as well as information about putative confounders are based on information retrieved early in pregnancy, before the birth of the child, and are therefore prospective. The information on the outcome is based on medical documents and is basically not affected by the exposure. Some weaknesses in MBR are that interview data will probably understate drug use, drugs may be taken but not reported/recorded, the indication for drug use is often not known and the information of exact duration and dosage is often incomplete. Further, the studies are based on born infants, aborted foetuses are not included.Pregnant women exposed to antiemetic drugs, a surrogate marker for nausea and vomiting during pregnancy, showed an overall better neonatal outcome including prevalence at birth of malformations in the infants. For some antiemetic drugs the number of exposures was low. Young maternal age, non-smoking, low education, parity >=2, were characteristics of women exposed to antiemetic drugs. There was an excess of girls and twins among born infants.Women using benzodiazepines or hypnotic benzodiazepine receptor agonists during pregnancy differ in many aspects from non-users. These differences may act as confounders in the analysis of pregnancy outcome, and were adjusted for. An increased risk for preterm birth, low birth weight and when exposed late during pregnancy also an increased risk for respiratory problems was seen in neonates. The teratogenic potential does not appear to be strong, but a higher than expected number of infants with pylorostenosis or alimentary tract atresia (especially small gut) was found. No increased risk for orofacial clefts was found.Women substituted with thyroid hormones during pregnancy had diabetes co-morbidity more often than expected as well as co-medication with, e.g., cardiovascular drugs, systemic corticosteroids and psychiatric drugs. Subfertility, previous miscarriage, pre-eclampsia, caesarean section and induction of labour were more common than in non-users. Neonates were only slightly affected, although a marginal increased risk for premature birth, increased rates of neonatal thyroid disease and a slightly increased rate of malformations was found.In conclusion, the Swedish Medical Birth Register has advantages and disadvantages but is a powerful tool for surveillance and assessment of teratogenic risks. However, possible associations found are hypothesis generating and need to be confirmed or rejected in new studies.List of scientific papersI. Asker C, Norstedt Wikner B, Källén B (2005). "Use of antiemetic drugs during pregnancy in Sweden." Eur J Clin Pharmacol 61(12): 899-906. Epub 2005 Nov 18 https://pubmed.ncbi.nlm.nih.gov/16328314II. Wikner BN, Stiller CO, Källén B, Asker C (2007). "Use of benzodiazepines and benzodiazepine receptor agonists during pregnancy: maternal characteristics." Pharmacoepidemiol Drug Saf 16(9): 988-94 https://pubmed.ncbi.nlm.nih.gov/17323407III. Wikner BN, Stiller CO, Bergman U, Asker C, Källén B (2007). "Use of benzodiazepines and benzodiazepine receptor agonists during pregnancy: neonatal outcome and congenital malformations." Pharmacoepidemiol Drug Saf 16(11): 1203-10 https://pubmed.ncbi.nlm.nih.gov/17894421IV. Wikner BN, Sparre LS, Stiller CO, Källén B, Asker C (2008). "Maternal use of thyroid hormones in pregnancy and neonatal outcome." Acta Obstet Gynecol Scand 87(6): 617-27 https://pubmed.ncbi.nlm.nih.gov/18568461</p
Murder on the mountain: author talk with Peter J. Wosh
No full textAuthor talk by Peter J. Wosh on May 5th, 2022, on his book, "Murder on the Mountain: crime, passion, and punishment in gilded age New Jersey.
Power consumption of analog circuits : a tutorial
No full textA systematic approach to the power consumption of analog circuits is presented. The power consumption is related to basic circuit requirements, as dynamic range, bandwidth, noise figure and sampling speed and is considering basic device and device scaling behavior. Several kinds of circuits are treated, as samplers, amplifiers, filters and oscillators. The objective is to derive lower bounds to power consumption in analog circuits, to be used as design targets when designing power-constrained analog systems.The original publication is available at www.springerlink.com: Christer Svensson and Jacob Wikner, Power consumption of analog circuits: a tutorial, 2010, ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, (65), 2, 171-184. http://dx.doi.org/10.1007/s10470-010-9491-7 Copyright: Springer Science Business Media http://www.springerlink.com/</p
Mr. Melvin J. Collier, RWWL AUC, June 2011
No full textThis video is a conversation with Mr. Melvin J. Collier. Mr. Collier talks about his book, "From Mississippi to Africa: A Journey of Discovery". Daniel Le, AUC Woodruff Library, is the interviewer
A Tripartite Post-Recession Rebalancing
No full textIn this latest Advance & Rutgers Report, entitled “A Tripartite Post-Recession Rebalancing,” Dean James W. Hughes and Professor Joseph J. Seneca deliver an incisive assessment of the current market conditions and obstacles in the path of our economic recovery. They offer a statistical cautionary tale that the private and public sector need to hear and acknowledge in order for the economy to make continued progress.This report was published as Issue Paper Number 7, November 2011, in Advance & Rutgers Report
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
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