Transmission lines. Source: 123rf Jacob Machinjike, general manager grids in Eskom transmissionand President of the South African Institute of Electrical Engineers (SAIEE). Credit: EskomEskom’s General Manager Grids in Eskom Transmission, Jacob Machinjike, was appointed President of the South African Institute of Electrical Engineers (SAIEE) for 2017 at the Institute’s Annual General meeting held in Johannesburg last week.The South African parastatal noted that his term commences at the end of March 2017 until the SAIEE’s next Annual General Meeting in March 2018.Thava Govender, Eskom group executive for transmission, said: “Jacob has 30 years’ experience in the engineering industry and has a sound understanding of the operation and maintenance of the entire value chain of the electricity supply industry.“He is no stranger to receiving accolades for his leadership role including being named Transmission Executive of the year 2011 and 2015. In the latter year he was also named the runner-up for the Eskom Executive of the Year award.”SAIEE appoints fellow memberMachinjike started serving in SAIEE leadership as an office bearer in 2014 as the institute’s Junior Vice President. In 2015, he served as Senior Vice President and in 2016 until the end of March 2017 he served as Deputy President and President Elect.According to Eskom, when his term as President ends in March 2018, he would have completed his five-year period in the institute’s EXCO leadership, serving as an Immediate Past President.He holds a Bachelor of Science in Electrical Engineering (Honours) and a Master of Business Leadership (MBL). He is a Fellow of the SAIEE and is registered with the Engineering Council of South Africa (ECSA) as a Professional Engineer.Besides being General Manager at Eskom responsible for Transmission Grid assets, he also represents Eskom on the Governing Board of the GO15 (an international organisation of very large power grid operators). He is a former director of a number of Eskom subsidiary companies, which include Trans Africa Projects (TAP), PN Energy Services, Pebble Bed Modular Reactor (PBMR), Umeme of Uganda, Motraco and Elgas of Mozambique.SAIEE objectives“The objective of the 2017 SAIEE presidential term of office is to continue building on the focus areas of the past few years, namely developing and nurturing skills to ensure the professionalisation of engineers, technologists and technicians,” explains Machinjike.He added: “I see the role of the Engineering Professional in today’s complex decision-making as requiring enthusiasm in growing membership among students and practicing engineers, increasing their ability to serve customers and to help in resolving South Africa’s and society’s challenges.”Machinjike said that there are also opportunities that require making use of new and emerging technologies, industry models, smart technologies, innovative solutions to attract investments, members’ access to international institutions and global business. Read more…Govender added: “Jacob is passionate about leadership, developing people and about coaching and mentoring for the sustainability of the industry. Congratulations to him on this voluntary but noble appointment and for continuing to serve the advancement of his profession and its development.” Finance and Policy Featured image: 123rf UNDP China, CCIEE launch report to facilitate low-carbon development Low carbon, solar future could increase jobs in the future – SAPVIA BRICS Generation Previous articleEskom and EDF sign MoU to enhance SA power gridNext articleZESCO continues drive for energy efficient bulbs Ashley TheronAshley Theron-Ord is based in Cape Town, South Africa at Clarion Events-Africa. She is the Senior Content Producer across media brands including ESI Africa, Smart Energy International, Power Engineering International and Mining Review Africa. AFD and Eskom commit to a competitive electricity sector RELATED ARTICLESMORE FROM AUTHOR
Jul 10, 2012 (CIDRAP News) – As researchers continue to sort out safety issues surrounding the monovalent vaccine used during the 2009 H1N1 flu pandemic, two new reports focusing mainly on an adjuvanted version suggest that immunization was safe for babies born to vaccinated pregnant women and that it was linked to a small but significant risk of Guillain-Barre syndrome (GBS) in some patients.Both reports appear in the latest issue of the Journal of the American Medical Association (JAMA) and focus on an AS03-adjuvanted vaccine made by GlaxoSmithKline.In the pregnancy study, Danish researchers studied a cohort of infants born in Denmark between Nov 2, 2009, and Sep 30, 2010. They obtained mothers’ 2009 H1N1 vaccination status from a national database. The AS03-adjuvanted split virus vaccine was the only one used in Denmark.Denmark’s pandemic flu vaccination campaign launched on Nov 2, 2009, with pregnant women in the priority group. Pregnant women with underlying conditions were urged to get vaccinated during their first trimester, and those without such conditions were advised to receive it during the second or third trimester.Using a cohort of 53,432 infants, researchers compared fetal outcomes among mothers who were and were not vaccinated. The main adverse outcomes they looked at were major birth defects, preterm birth, and smallness for gestational age.Of the group, 6,989 babies were exposed to the vaccine during pregnancy, all but 345 of them in the second or third trimester.The researchers found no association between vaccination during pregnancy and major birth defects, preterm birth, or fetal growth restriction.The small number of babies exposed to the vaccine during the first trimester allowed the researchers to exclude only the larger risks, but even in that high-risk group, the results were reassuring, the authors said.They wrote that while other studies have looked at fetal safety of H1N1 vaccination, theirs was the first to directly compare outcomes from vaccinated and unvaccinated mothers.The results might be generalizable to nonadjuvanted vaccines because they contain identical viral antigens, though antigen doses and manufacturing processes may vary, the investigators wrote, adding that the results don’t extend to vaccines that used other adjuvants.The safety data on babies born to vaccinated mothers may have implications for future flu seasons and pandemics, especially when adjuvants are needed to achieve adequate immune response, the researchers said.In the second study, researchers analyzed enhanced GBS surveillance that Quebec health officials ordered during the 2009 H1N1 vaccine campaign. The investigation was ordered by the province’s chief medical officer under the Quebec Public Health Act. Quebec’s pandemic flu vaccine campaign launched on Oct 26, 2009, targeting everyone age 6 months and older. About 96% of vaccinated Quebec residents received the AS03-adjuvanted vaccine, and vaccination status was verified with provincial registries.The population-based cohort study followed patients over a 6-month period from October 2009 through March 2010. Physicians were urged to report suspected and confirmed GBS cases. Patients’ records were reviewed by a physician, with assistance from adult and pediatric neurologists. Reviewers were blinded to the immunization status of the cases.Over the study period, researchers identified 83 confirmed GBS cases, including 25 patients who had been vaccinated 8 or fewer weeks before symptom onset, most (19 of 25) of whom were vaccinated 4 or fewer weeks before GBS onset.For those with GBS onset 8 or fewer weeks after vaccination, the relative risk was 1.80 (95% confidence interval, 1.2 to 2.87), and for those with the earlier onset the risk was 2.75 (95% CI, 1.63 to 4.62).Overall, the team found that the number of GBS cases linked to vaccination was about 2 per 1 million doses. They observed a cluster of cases shortly after the vaccine campaign started, which they said wasn’t likely to have been caused by flu infection. The group found no excess risk in people younger than 50.For comparison, a US study of GBS in recipients of the unadjuvanted 2009 H1N1 vaccine found that there were about 0.8 excess cases of GBS per 1 million vaccinations, which is similar to that for the seasonal flu vaccine. A similar study in five European countries that used an adjuvanted vaccine found that vaccination probably didn’t increase the GBS risk, but investigators couldn’t rule out a slightly greater chance of suffering from the condition.The Quebec researchers concluded that the adjuvanted 2009 H1N1 vaccine was linked to a small but significant GBS risk, but they said the benefits of immunization probably outweighed the risks.In an accompanying JAMA editorial that addressed both of the studies, two infectious disease experts said it’s important to assess the potential pandemic vaccine risks to fetuses as well as adults. The authors are Mark Steinhoff, MD, director of the Global Health Center at Cincinnati Children’s Hospital Medical Center, and Noni MacDonald, MD, MSc, professor of pediatrics and computer sciences at Dalhousie University in Halifax, Nova Scotia.”Taken together, these studies partially assuage concerns about the safety of adjuvanted pandemic influenza vaccines during pregnancy,” they wrote. “However, more studies are needed examining other types of vaccine adjuvants.”They noted that observational studies of vaccines can be limited by biases and confounding by indication, adding that future studies with improved statistical design are needed to confirm the findings, such as prospective follow-up studies using virologic end points with adjustments for selection, seasonality, and other biases.Pasternak B, Svanstrom H, Molgaard-Nielsen D, et al. Risk of adverse fetal outcomes following administration of a pandemic influenza A (H1N1) vaccine during pregnancy. JAMA 2012 Jul 11;308(2):165-74 [Abstract]DeWals P, Deceunick G, Toth E, et al. Rick of Guillain-Barre syndrome following H1N1 influenza in Quebec. JAMA 2012 Jul 11;308(2):175-81[Abstract]Steinhoff MC, MacDonald NE. Influenza pandemics—pregnancy, pathogenesis, and perinatal outcomes, editorial. JAMA 2012 Jul 11;308(2):184-85[Extract]See also:Jun 2, 2010, CIDRAP News story “CDC: GBS risk similar for H1N1 and seasonal flu vaccines”Jul 13, 2011, CIDRAP News story “Study: adjuvanted H1N1 vaccines had little effect on GBS risk”
Peregrine Semiconductor has introduced a new monolithic 100-watt power limiter, based on their UltraCMOS SOI Technology. The PE45361 is the next generation in Peregrine’s power limiter product family. It builds on the success of the 50-watt UltraCMOS power limiters and adds higher pulsed power handling, a lower limiting threshold and positive threshold control. UltraCMOS power limiters provide a monolithic alternative to discrete, PIN-diode limiters based on gallium-arsenide (GaAs) technology and protect devices against excessive RF power, intentional jamming and ESD events. It delivers reliable and repeatable power protection to sensitive low-noise receivers for test-and-measurement equipment and wireless-infrastructure transceivers.Compared to PIN diodes, UltraCMOS power limiters provide a 10 to 100x improvement in response-and-recovery time, deliver 10 to 40 dB linearity (IIP3) improvement and offer a 20x improvement in ESD protection. UltraCMOS power limiters also require 8x less board space than that required by conventional PIN-diode solutions. Finally, the limiting threshold can be adjusted through a low current voltage control pin (VCTRL), eliminating the need for external components such as DC blocking capacitors, RF choke inductors and bias resistors.Like other UltraCMOS power limiters, the PE45361 features two operating modes – power limiting and power reflecting – to maximize performance and flexibility. These modes can be selected through the programmable VCTRL pin. In power-limiting mode, the device is invisible to the load. When the incoming RF signal power exceeds the limiting threshold set through the VCTRLpin, the device limits the input RF power. The Power-reflecting mode is used in more extreme conditions, where the device reflects most of the incident power back to the source.Features, Packaging, Price and AvailabilityCovering a wide frequency range from 10 MHz to 6 GHz, the PE45361 power limiter provides exceptional power protection for high performance, power-limiting applications. It can handle high pulsed power up to 50 dBm and 100 watts, has an adjustable limiting threshold from 5 dBm to 13 dBm and a positive threshold control from 0 to 0.3 volts. The PE45361 delivers a low insertion loss of 0.95 dB at 6 GHz and high return loss of 15 dB at 6 GHz. With a fast response time of 1 nanosecond and a speedy recovery time of 20 nanoseconds, it exhibits high linearity of 37 dBm IIP3 and excellent ESD protection of 3 kV HBM. Samples and evaluation kits are available now.
About Connatix V56892 360p The New England Patriots and Atlanta Falcons won their respective conference championship games on Sunday to advance to Super Bowl 51 in Houston on Feb. 5. Here’s a recap of the day’s action:New England 36, Pittsburgh 17Tom Brady threw for 384 yards and three touchdowns, and the New England Patriots beat the Pittsburgh Steelers, 36-17, in the AFC championship game in Foxborough, Mass. on Sunday. As a result of the win, Brady and head coach Bill Belichick will make their record seventh Super Bowl appearance when the Pats face the Atlanta Falcons on Feb. 5 in Houston. 1080p HD Visit Advertiser website GO TO PAGE Skip About Connatix V56892 1/1 720p HD Auto (360p) Chris Hogan caught nine passes for 180 yards and two touchdowns for New England. Julian Edelman had eight receptions for 118 yards and a touchdown. Brady completed 32 of 42 throws, while victimizing the Pittsburgh defense the entire game.The Steelers lost running back Le’Veon Bell late in the first quarter to a groin injury, but that was just one factor that led to their defeat. The Steelers couldn’t effectively pressure Brady, and they couldn’t convert enough third downs to keep pressure on the Patriots.Ben Roethlisberger threw for 314 yards and a score, with an interception, for Pittsburgh. The Steelers never had a lead in the game and never closed their 17-9 halftime deficit.Atlanta 44, Green Bay 21Getty ImagesMatt Ryan threw for 392 yards and four touchdowns, and the Atlanta Falcons routed the Green Bay Packers, 44-21, in the NFC Championship Game at the Georgia Dome on Sunday.The victory allowed Atlanta to advance to its second Super Bowl appearance in franchise history.The Falcons jumped out early and built a 24-0 halftime lead that all but decided the title game. Green Bay rallied slightly in the second half, but the Packers never closed within three touchdowns.Julio Jones caught nine passes for 180 yards and two scores for Atlanta. His 5-yard TD reception just before halftime all but decided the game and the NFC’s Super Bowl representative.Aaron Rodgers threw for 287 yards and three scores, with an interception, for Green Bay. He was sacked twice and pressured often, as the Falcons defense stepped up to help get its team to the Super Bowl.The Packers two turnovers and their sputtering offense prevented the NFC North champs from keeping with Atlanta or rallying late in the game.The Falcons will play the winner of Sunday night’s Steelers-Patriots AFC Championship in Super Bowl LI in Houston on Feb. 5.