Week Seven Stats (Men) | Week Seven Stats (Women)FRISCO, Texas – New Orleans’ Mats Westkamp and Central Arkansas’ Chunxi Xin are the Southland Conference Men’s and Women’s Tennis Players of the Week, respectively, the league announced Tuesday. Honorable Mention: Emma Honore, A&M-Corpus Christi; Nini Memishishi, Abilene Christian; Ank Vullings, New Orleans. Westkamp continued his strong start to the season, improving to 6-1 in singles play and claiming his fourth win in the last five doubles matches when paired with Austin Vos. Westkamp’s two victories powered the Privateers to a 5-2 win over UTRGV on Sunday. UNO (6-2) is off for the next week until it hosts Northern Illinois at 2 p.m. CT on March 10. Women’s Tennis Player of the Week – Chunxi Xin, Central Arkansas – Sophomore – Baoding, ChinaXin and Lamar’s Jasmin Buchta went down to the wire in both sets of their No. 1 singles showdown on Friday with Xin coming out on top 7-6 in each frame. Xin followed it up with a gritty three-set win over A&M-Corpus Christi’s Mariya Shumeika. Xin responded to losing set two 6-1 by reciprocating the score in the final set to come out on top. Honorable Mention: Piyush Surendra Salekar, Nicholls; Kyohei Yamanaka, Texas A&M-Corpus Christi. Westkamp and Austin Vos topped Izurieta and Alberto Mello 6-4 in doubles action, clinching the doubles point for UNO. The duo has come out on top of four of its last five matches and is 4-3 on the year. Paired with Fuka Nonoyama at No. 1 doubles, Xin and Nonoyama defeated their Lamar counterparts 6-3 and their Islander opponents 6-1. Xin has now won five in a row at the No. 1 (7-3) and nine straight at the top doubles spot with Nonoyama (10-2). Xin played a vital role in the Bears’ 2-0 start to league play over the weekend. She triumphed in each of her top-line singles contests and won both doubles matches as UCA edged Lamar 5-2 and Texas A&M-Corpus Christi 4-3. The Bears (8-5, 2-0 SLC) look to stay perfect when they host New Orleans at 1 p.m. Friday and Nicholls at 11 a.m. Sunday. Southland weekly award winners are nominated and voted upon by each school’s sports information director. Voting for one’s own athlete is not permitted. To earn honorable mention, a student-athlete must appear on at least 25 percent of ballots. Men’s Tennis Player of the Week – Mats Westkamp, New Orleans – Senior – Bonn, GermanyWestkamp cruised to a win at No. 1 singles against UTRGV’s Carlo Izurieta 6-0, 6-2. Westkamp has surrendered just three sets in seven matches at the top flight this season and has won four straight.
LONDON (CMC):Somerset officials said they were anxiously anticipating Chris Gayle’s appearance in the Twenty20 Blast later this year, after the West Indies batting star signed off on a six-match deal to represent the English county.The 36-year-old Jamaican had a massive impact when he played in last year’s tournament, smashing scores of 92, 151 not out and 85 not out to pile up 328 runs in just three games.Director of Cricket Matthew Maynard said the club was already looking forward to Gayle’s presence.”We are absolutely delighted to have secured the services of Chris Gayle once again. He is a genuinely world-class player and was absolutely phenomenal for us last year,” Maynard said.”He is probably the biggest name in the sport at the moment and his performances in the Big Bash recently have only underlined his status as one of the most explosive players that cricket has ever seen.Club chief executive Guy Lavender said what had been even more impressive about Gayle during his stint with Somerset last year was his community involvement and charity work.This aspect, Lavender pointed out, had been a key factor in extending the relationship with the superstar left-hander.”Everyone sees the runs that he scores, but not everyone will be aware of his willingness to help off the pitch. It is these two elements which have maintained our desire to ensure that he would be back with us in 2016.”Gayle is arguably the most valued T20 batsman in the international game and is coming off a successful outing in the Australia Big Bash for Melbourne Stars.His stint for Somerset will run from June 1-17 following his campaign in the Indian Premier League, and Gayle says he is keen on helping Somerset qualify for the advanced rounds of the competition.”I really enjoyed my time at Somerset last year. It’s a great Club and the supporters were absolutely incredible,” Gayle said.”I’m looking forward to seeing the fans again and to scoring some more runs. Hopefully, I can help the club make it through to the later stages of the NatWest T20 Blast.”
0Shares0000Liverpool beat off competition from Manchester City to sign Van Dijk from Southampton for £75 million ($106 million) in January © AFP / Paul ELLISMANCHESTER, United Kingdom, Apr 9 – Virgil van Dijk has lived up to his billing as the world’s most expensive defender in his short Liverpool career, but shutting out a desperate Manchester City in the second leg of their Champions League quarter-final on Tuesday could be his biggest test yet.Runaway Premier League leaders City could line up with the most expensive defence ever assembled for their rescue mission, but they may regret letting Van Dijk get away if they fail in their mammoth task to overturn a 3-0 first-leg deficit. Liverpool beat off competition from City to sign Van Dijk for £75 million ($106 million) in January from Southampton, six months after their first attempt to land the Dutchman failed.Jurgen Klopp was much-criticised early in the campaign for refusing to splash out on a back-up option to Van Dijk as Liverpool’s chances of challenging City for the title vanished quickly due to defensive deficiencies.However, Klopp’s patience to get his prime target has been rewarded as Van Dijk has spearheaded a turnaround in Liverpool’s ability to keep opponents at bay.“What we need at Liverpool are these kind of players who are leaders,” said Klopp recently on Van Dijk’s influence.The Dutch captain will be examined to the full at the Etihad, though, where Liverpool lost 5-0 earlier in the season.“They have so much quality, they are going to win the league that’s pretty clear, that’s not for no reason,” said Van Dijk on Tuesday.“We feel we are in a great moment at the moment and I think we can make it difficult for any team in the world.“But we still need to show it, be ready for a fight, ready for a big game.”Liverpool’s Dutch defender Virgil van Dijk attends a training session at Melwood in Manchester, north west England on April 9, 2018, the eve of his side’s UEFA Champions League quarter-final second leg against Manchester City © AFP / Paul ELLISKlopp’s men were also thrashed 4-1 by Tottenham and involved in thrilling 3-3 draws at Arsenal and Sevilla as they were routinely torn apart on their toughest travels before Van Dijk’s arrival.Often overshadowed by the prolific front three of Mohamed Salah, Roberto Firmino and Sadio Mane at the other end of the field, Liverpool’s improvement at the back, though, is not down to Van Dijk alone.All those early-season collapses on the road also came prior to Andy Robertson and Trent Alexander-Arnold establishing themselves as Klopp’s first-choice full-backs.– Bargain solutions –Despite their more illustrious history, Liverpool struggle to compete financially with Abu-Dhabi backed City’s budget.Even Van Dijk’s signing was financed by the £142 million sale of Philippe Coutinho to Barcelona in January.But Liverpool have proved far more adept at finding bargain solutions.City spent over £130 million on full-backs alone last summer in buying Kyle Walker, Benjamin Mendy and Danilo.By contrast, Robertson was a £10 million pick-up from Hull City, who were relegated from the Premier League last season, whilst Alexander-Arnold has been at the club since the age of six.“We know as a team we can defend very well,” added Van Dijk. “Pretty compact as you could see in the second half against them (in the first leg.)”Alexander-Arnold was constantly targeted by City up against the pace and trickery of £37 million German international Leroy Sane.Yet, rather than being intimidated by the opposition, or the frenzied atmosphere of Anfield on a big European night, the 19-year-old right-back produced the performance of his career to date in nullifying Sane and winning man-of-the-match.“It’s really pretty rare that Sane had pretty much nothing for finishing, making goals, stuff like that,” said Klopp afterwards. “It was outstandingly good, to be honest.”Patience was also key with Robertson. The Scot found himself sidelined for the majority of the first half of the season until an injury to Alberto Moreno in December handed him a run in the side.Five-time European Cup winners, Liverpool have waited a decade to get back into the Champions League semi-finals. But as Van Dijk shows, good things come to those who wait.0Shares0000(Visited 1 times, 1 visits today)
Ilkay Gundogan Manchester United and Liverpool target Ilkay Gundogan has reaffirmed his commitment to Borussia Dortmund.The German international has been linked with a possible reunion under former manager Jurgen Klopp at Anfield, while United are also keeping track of his progress.But the playmaker insists he is still devoted to Dortmund and revealed he sees himself remaining at the Bundesliga club next season.“This is an issue that is always floating around,” said Gündo?an“I am very happy with BVB and feel very comfortable here.“Of course, I can imagine remaining here beyond the end of the season.” 1
The annual Manorcunningham 5k Road race and walk took place on Tuesday night.The rain stayed away to make for perfect conditions for a tough battle around the village and country roads of Manor,with the presentation taking place in the resource centre.The local ladies provided refreshments after which were much appreciated. The race was won by Gavin Crawford (16.43) 24/7 club and a native of Manor. He managed to hold off Ivan Toner (LAC) and the ever improving Kieran Crawford (LAC) in an exciting finish, much to the delight of the local supporters.Finnula Diver(18.31) who ran a PB last year on this course returned to defend her title in fine style, from Catherine Whoriskey of city of Derry, who was just 6 sec. over the 19 minutes.Kevin Ferry won the vets over 40 section and is having his best year ever on the 5k circuit, holding off Marcus McClintock on his home ground.Liam Marley Cranford AC, broke the 21 minute barrier to record a won, from PJ Friel. In the Vetern Ladies Eithne Cox got the better of Fiona Wasson, and Ruth McCrudden, in a very close battle.First Junior went to Dayle Gallagher, in a fine time of 18.23, and the first Local home was Richard Gordon in a time of 18.51.But the biggest personal battle of the night was taking place back in the field of almost 150 competitors.Shaun (Swan) O Donnell, Ernie Pollock, and Eugene McGinley, three locals that have competed in almost 40 5k road races this year. Shaun was fresh from the Termon 5k last Friday night with a new PB. But Ernie and Eugene were ready to do battle.Eugene changed tactics and went from the start with blistering pace carrying Ernie with him and by the time they reached Ray grave yard, Shaun was nearly dead and buried, with a PB to live up to Shaun attacked again on the Manse Road (3k mark), However Eugene struck for home again at Platts corner to dispel any come back from his two running mates.Ernie showed great speed and determination from Lynseys Shop with 400 meters to go to hold off Shauns famous kick finish and managed to hold on to the finishing line. But Shaun had the last word “yous still didn’t beat my PB from Termon boys”A Big thank you to all who helped on the night and to all the competitors who took the time to come out and support the race.113GavinCrawford24/7 clubS Men16.43220IvanTonerLACS Men16.53326KieranCrawfordLACS Men17.04463KevinFerryLACO 40 men17.08564BrianCrossanS Men17.22665RaymondBirchLACS Men18.14733MarcusMc ClintockLACO 40 men18.17867PauricBreslinS Men18.19912KarolMc LaughlinInishowen A/CS Men18.211051JohnDaleyLACO 40 men18.2211221DayleGallagherLACJunior18.23124GarethKerriganMilfordS Men18.251378FionnualaDiveLACS Ladies18.301469KennyO DonnellFinn ValleyO 40 men18.341573PaulMurrayFinn ValleyS Men18.381666BarneyFerryLACS Men18.431772RichardGordanJunior18.511832DarrenPriceLACS Men18.551961CatherineWhoriskeyCity Of DerryS Ladies19.062062DarrenWallaceFoyle VS Men19.102175AaronColeS Men19.152230MartinMc CabeS Men19.172323RobertGallagherStrabaneS Men19.252497StewartMageeS Men19.282528AdrianHerrityS Men19.3526100VinneyHegartyInishowen A/CS Men19.5127210MichaelMaddenLACS Men20.012871DavidGordanS Men20.0229203SeamusNallenS Men20.033054TreasaDohertyInishowen A/CS Ladies20.123180RichardGildeaLACS Men20.2832206CathalMorrisonO 40 men20.333384PaulGildeaS Men20.383481RonanGildeaS Men20.403524ChristopherMc NultyStrabaneS Men20.473640LiamMarleyCranfordO 50 men20.533745AidanO DonnellS Men20.593891FelimLynchS Men21.113970DarrellDuncanS Men21.164031PJFrielO 50 men21.194135AdrianMc HughS Men21.2042219SeanTonnerS Men21.23437BrendanGoyvaertsUnited Health CareS Men21.254421AnthonyMurrayO 50 men21.264579MartinaHegartyS Ladies21.3146213NoelLynchLACO 40 men21.344742GarvanBoyceO 40 men21.504892RonanGibsonS Men21.524943KevinDohertyS Men21.545044JohnMc KelveyS Men21.56512EugineMc GinelyO 45 men21.5852201PeterMc KinneyInishowen A/CO 50 men22.0253220PaddyGildeaS Men22.035418PatByrneKillybegsO 50 men22.085582DeclanMc ElwaneS Men22.09563ErniePollockO 50 men22.1357202SeamusMc DaidInishowen A/CO 40 men22.1458207TrevorCoxS Men22.195916ShaunCrossanJunior22.226059JimmyMc BrideO 50 men22.336148PaulRodgersS Men22.356299PhilipBrownS Men22.386325StepheneMc philemyO 50 men22.466476SamColeCity Of DerryJunior22.506568ChrisAshmoreO 40 men23.256637CarolineMc NultyFinn ValleyS Ladies23.276739DavidWilsonS Men23.286856AlisterHetheringtonS Men23.30691ShaunO DonnellUnattachedO 50 men23.4770209EilishMc ClaffertyS Ladies23.5871102BridMcGintyS Ladies24.1472101NadineCrawfordS Ladies24.1473211DarrenGallagherS Men24.167498MarkBrownJunior24.1775215GerryDurningO 50 men24.187634MarrianKerrLACS Ladies24.197715KarolMc GinelyJunior24.207817JimmyWhiteKillybegsO 50 men24.217993EmmetO DonnellS Men24.228085WesleyMc KaneFinn ValleyS Men24.298111MartinO DonnellO 40 men24.398260MarkKildaeS Men24.428377BarryTinneyS Men24.438441NoelleParker24/7 clubS Ladies24.558538JonathanWilsonS Men24.5686204OrlaNallenS Ladies24.578752DavidHigginsO 50 men25.0688208EithneCoxO 40 w25.108949FionaWassonO 40 w25.2790214RuthMc CruddenLACO 40 w25.289174BrianCoyleJunior25.32926CiaranCoyleUnited Health CareS Men25.33939PaulDohertyO 40 men25.419450ShaunaMc GeehanLACS Ladies25.469546John PaulSweeneyS Men26.229653GrainneHigginsJunior26.3197216BrendaMc CahillO 40 w26.559888LizzGallagherS Ladies26.579919BillyBrodricKillybegsO 40 men27.0310057EileenMorningS Ladies27.06101212MadelineCrampsie24/7 clubS Ladies27.101025EamonnO ReganO 50 men27.29103218NoelHeekinS Men27.4210496DeanSpencerS Men27.4310529CathalLeppordJunior27.5610655CherylHetheringtonS Ladies27.5810794SaraCrawford24/7 clubS Ladies28.0210895JoanneOrgan24/7 clubS Ladies28.18109222RoseLynchS Ladies28.3511090PJMc MonagleO 40 men28.3611189LisaMc MonagleS Ladies29.0211247LindaKennedyS Ladies29.03113319CromhanWheelerWalker29.0411427JordanGallagherJunior29.1011583ClaireGildeaS Ladies29.1211614LauraMc GinelyS Ladies29.1711787DorethyMc HughS Ladies29.30118205WilliamBonnerS Men29.3311986JosieGallagherS Ladies30.12120301AmandaMc ConnellWalker30.2312122ShaneBonnerJunior30.24122322JoanWallace JnrWalker30.25123312MarkBoonerWalker31.091248AngelaQuinnO 40 w31.1312558CloeHetheringtonJunior33.08126314JessicaBroganWalker33.08127325NiamhTonerWalker33.40128306Dee DeeDiverWalker33.4112910OliveDohertyO 40 w33.58130223LorraineGildeaS Ladies34.20131323EithneWallaceWalker34.22132324KathleenTonerWalker34.29302GerardMc ConnellWalker303MaryMc FaddenWalker304SusanKellyWalker305RoisinMc FaddenWalker307AlisonGibsonWalker308PaulineMc GinelyWalker309KateGibsonWalker310JoanFarrelWalker311BrianBonnerWalker313NorlaBroganWalker315ShaniaMc ElhinneyWalker316MarrianDillonWalker317YasminKellyWalker318ChantelleWheelerWalker320ClionaMc FaddenWalker321JoanWallaceWalker326GloriaMc FaddenWalker327BridCullenWalker328ColleenMc ConnellWalker329LaurenGallagherWalker330LeahGallagherWalker331TinaLynchWalker332MargaretMc ConnellWalker333CharleneMc ConnellWalker334DeniseGibsonWalker335AngelaDoranWalker336MiaDoranWalker337MathewDoranWalkerALL THE RESULTS FROM THE MANORCUNNINGHAM 5K was last modified: July 3rd, 2013 by John2Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)Tags:ALL THE RESULTS FROM THE MANORCUNNINGHAM 5K
CLICK HERE if you are having a problem viewing the photos or videos on a mobile deviceOAKLAND — Clippers coach Doc Rivers compares Oracle Arena to the old Boston Garden, but said the similarities have nothing to do with the structures themselves.“It’s a great venue because of the fans. It’s not a great venue because of the building,” Rivers said before Game 1 of the Warriors-Clippers playoff series that initiates the franchise’s final postseason run at Oracle. “It’s like the …
An astonishing feat has been performed in a Canadian lab: scientists turned human skin cells into blood cells. Bypassing the need for stem cells, the technique provides hope for a supply of blood from a person’s own skin.Live Science calls it a “modern miracle.” The technique avoids “the ethical concerns concerning embryonic stem cells and the immune system complications that might reject foreign biological material.” Reprogrammed adult stem cells were tried, but they are difficult to make in quantity and cannot be transplanted. Bypassing the stem cell stage, the team at McMaster University found they can create larger quantities of blood cells. They also found that the technique works with skin from young and old individuals. Does this open the door for creating other types of cells by this method? “We’ll now go on to work on developing other types of human cell types from skin, as we already have encouraging evidence,” said Mike Bhatia, a lead study author and scientific director of the Stem Cell and Cancer Research Institute at the University. Science Daily added that this method offers hope also for cancer patients, who in the future may no longer need to find bone marrow transplants that are a perfect match. Cynthia Dunbar at the National Institutes of Health said, “Bhatia’s approach detours around the pluripotent stem cell stage and thus avoids many safety issues, increases efficiency, and also has the major benefit of producing adult-type l blood cells instead of fetal blood cells, a major advantage compared to the thus far disappointing attempts to produce blood cells from human ESCs [embryonic stem cells] or IPSCs [induced pluripotent stem cells].” In another cell story, Science Daily reported that researchers at Johns Hopkins found “a protein mechanism that coordinates and regulates the dynamics of shape change necessary for division of a single cell into two daughter cells.” A protein designated 14-3-3 “sits at an intersection where it integrates converging signals from within the cell and cues cell shape change and, ultimately, the splitting that allows for normal and abnormal cell growth, such as in tumors.” This controller protein influences the actions of molecular motors: “myosin II, a complex of motor proteins that monitors and smoothes out the shape changes to ensure accurate division.”This very welcoming news about blood cells from skin has the potential of being called a breakthrough of the year (or decade). It is important not only for the tremendous health benefits it can offer, but for showing that ethically-clouded practices like the use of human embryos are not needed or justified. Even more amazing are the insights this technique will provide into the workings of the cell – insights that required no help from Darwin – that promise even more health benefits in coming years. People who care about the value of human life will also welcome this finding that may take some of the pressure off the stem cell gold rush.(Visited 7 times, 1 visits today)FacebookTwitterPinterestSave分享0
Subscribe to Green Architects’ Lounge on iTunes— you’ll never miss a show, and it’s free! The highlights:Why ventilate? So your house is tight. That’s awesome from an energy-efficiency standpoint, but without proper ventilation, that can lead to some serious problems: comfort problems, humidity, the buildup of toxins, or particulate contamination.Ventilation options. There’s a difference between doing right by code and doing right by your occupants. Sonia helps us navigate the difference and walks us through some the best options. Spoiler alert: We’re quite fond of a balanced ventilation system using efficient ERVs.ERV vs. HRV. What’s the difference and which should you use? And when?Placement of the diffusers and grilles. We talk about the best places to supply and exhaust. We also talk about the Coanda effect.How efficient are these ERVs? A straightforward question with a wiggly answer.Be sure to check out Part Two, where we cover the different equipment options and how to handle the imbalance that your exhaust appliances place on your system.Thanks for tuning in. Cheers! TRANSCRIPTChris: Hey everybody, welcome to the Green Architects’ Lounge podcast. I’m your host, Chris Briley.Phil: And I’m your host, Phil Kaplan. Hey Chris, good to see you… again!Chris: Great to see you after a long hiatus! We apologize, listeners, but we have day jobs and families and it’s summer now…Phil: And it’s summer in Maine. So, come on. You can’t expect us to sit in and record these things… unless we have a drink in our hands.Chris: Which we do. Cheers!Phil: Cheers!Sonia: Cheers!Chris: Oh, and that other voice: We have a special guest with us, and that is Sonia Barrantes.Sonia: Barrantes.Chris and Phil: Barrantes!Phil: Welcome, Sonia.Sonia: Thank you! I’m pretty excited to be here with the local “starchitects.”Chris: Starchitects?! Thank you. Tell us about your background. We know you as a mechanical engineer who actually has built her own Passive House.Sonia: Well, actually, my partner Jake kicked me off the job site about a year ago. He said I could come back when it was time to sand drywall. But he’s been watching some YouTube videos and he’s decided that is actually a critical job. So I don’t know when I’ll be allowed back in.Phil: Oh wow!Sonia: So, he’s actually built the house almost entirely himself.Chris: But you’ve been integral?Sonia: I would like to think so. Yes.Chris: I would like to think so, because we have you on the podcast and we’d like to think that you were all over that. And you also are, or were, a fighter pilot?Sonia: Well, actually… Jake was a naval aviator, a Navy test pilot. I was a naval flight officer. In Top Gun, he was Maverick and I was Goose.Chris: Goose, I’m so sorry!Sonia: No. Everyone needs a Goose.Chris: Yeah, exactly. I just feel bad for Goose. (He dies.) Spoiler alert!Sonia: We didn’t fly Tomcats. I mean, I have flown Tomcats, but I didn’t do it for my actual jet.Chris: That’s cool, though! So you’re not your typical mechanical engineer — which is why you’re on this podcast.Phil: Yeah, the reason Sonia’s here is that Chris and I have both been thrilled to work with Sonia over the last couple of years.Sonia: Thanks, guys.Phil: Because she’s a mechanical engineer who gets it — which is really rare. It really is. I mean, architects — there are too many of us around already. I’m sure you can agree; we’re a dime a dozen.Chris: Oh yeah, this room is already crowded.[Laughter]Phil: There’s already one too many.Chris: One too many. Two is one too many.Phil: One of us has got to go, Chris.Chris: Exactly, and we’re going to decide it by who drinks the most.Phil: Don’t dare me.Chris: It’s on.Phil: It’s on. Let’s wait till after we finish the podcast.Chris: Okay, so you guys probably already know — because we have a mechanical engineer on — we’re going to talk about ventilation. This podcast is going to be titled something like, “Ventilation for Your Super-Tight House.”We are assuming that you’ve come to us and have already listened to our air-sealing podcast and are already building that really tight house and you’ve probably gotten really far in your design. And then somebody says something about putting in a wood stove — “so how do you want to provide makeup air for your stove?” — and then you realize, “Oh my gosh! I really have to learn a lot about ventilation.”It’s not just handing it over to your typical engineer who’s going to say — you know how they do that, Sonia — they just do some neat calculations, slap some mechanical equipment in there, and…Phil: Oversize it just to cover their asses…Chris: Exactly.Phil: …and move on. Right.Chris: Right.Phil: But, we’ve mentioned “ventilation” in just about every podcast (I would imagine) and we’ve never dedicated an entire podcast to it. So we’ve decided to kick it up a notch. And Sonia’s here to help us sound smart because Chris and I struggle with that.Chris: Yeah, especially after a drink or two.Phil: Yeah, can we talk about the drink?[The guys jaw about this episode’s cocktail.]Chris: So, let’s start with the fact that you have a tight house. Right? How tight is your house, Phil, in this scenario?Phil: That’s a really good question. We talk about 1.0 ach50 (one air change per hour) and that’s what we have in our specs, typically, at 50 Pascals. When you’re going for Passivhaus, you go to 0.60, often we’ll do that as well. We don’t always do Passivhaus, but those numbers are kind of what sit in our specs typically.Chris: Yeah. You’re basically shooting for as low as you can go, pretty much. I mean, there’s not a “too tight” if we’re going to ventilate this thing.Phil: Right.Chris: We’ve said this before: 25% of your heat loss, usually, is through your leaks in your house – that’s with your windows and doors shut. Not just through conduction through your envelope, but through convection leaks and all that stuff.So, let’s say you’ve got your tight house at 1.0 ach50. And so now you have issues, maybe, if you’re not ventilating – because now, every little odor — What do we call those, Sonia?Sonia: High pollution events.Chris: If you invite your flatulent friends over and they have a high-pollution event, that sucker could linger for a really long time. You get your general stuffiness, which…Phil: I’m glad I didn’t make my bean cocktail tonight.Chris: I’m impressed you have a bean cocktail!Phil: Nah, I don’t have a bean cocktail. I have a bean bitters, but no bean cocktail.Chris: So, you get high humidity. If you’re not ventilating, you’ve got high humidity (which is also stuffiness). And with humidity, you can get damage to your walls (internal to the assemblies). You can get mold and mildew. And, any toxins in your house that you’ve brought in – formaldehyde in your cabinetry, or VOCs from your paint sealants, or radon…Phil: What else did we forget, Sonia?Sonia: You’re forgetting particulate matter, like from cooking. Cooking gives off all kinds of chemicals. LBNL (Lawrence Berkeley National Laboratory) did a study on that, and a gas cooktop gives off some really nasty stuff.Chris: Just sitting there.Sonia: Just sitting there.Chris: Natural gas.Sonia: Yup. And the particulate matter that is generated by cooking, if it gets down below – this is totally nerdy! – 2.5 microns, you can actually inhale that and cause damage to your lungs. There’s a lot of…Chris: Grease-laden vapors.Sonia: Yeah, absolutely.Chris: So, we have to ventilate, right? We have your tight house. We have to do something – not only for comfort, but for health.Phil: So what are our options?Chris: Sonia, what are our options? I come to you as an idiot architect. I’ve got this super-tight house and people are telling me that I really ought to ventilate. What do I do?Sonia: Well, you have to separate it between your options by code and your options by what really is effective.Phil: Right. So, what does code say? What’s the baseline?Sonia: So, code says – it depends on your state, obviously. Most states have what’s called an equivalency for ASHRAE 62.2. So you can either comply with the International Mechanical Code, the residential code, or ASHRAE 62.2. So, in Maine we have the option to comply with ASHRAE 62.2.ASHRAE 62.2 requires a certain amount [of ventilation] based on the number of bedrooms and the square footage of the house. You have to get that much ventilation air – fresh air – into the house. You can either do it by exhaust-only – which, I think, we’ll talk about.Chris: Right.Sonia: Or you could do it by providing supply air and exhaust.Chris: Right. A balanced system.Sonia: It could be. It could be balanced.Chris: Oh. I see. Or you could do exhaust-only with makeup air.Sonia: Right. And so, you could kind of get into the weeds. I don’t know if I’ve ever heard of a code inspector coming into a residential home and running those calculations for you. But technically, if you’re going to comply with ASHRAE, you can either do continuous ventilation or intermittent ventilation. What you need is, over a certain period of time, the same amount of air. So, if you do intermittent ventilation, you have to ventilate at higher rates than if you do continuous.Chris: Are you supposed to do — I thought (maybe you can correct me) that kitchens had to have, like, 5 cfm continuous exhaust.Sonia: 5 ACH.Chris: Oh!Sonia: Yeah. You have two options in ASHRAE 62.2. You can either do 100 cfm intermittent – which is basically a “when you use” — when you’re cooking — or you can do 5 ACH continuous. (And that is ACH of your kitchen.)Chris: Gotcha.Sonia: And I don’t really know, in these open floor plans…Chris: Right. How do you even… I’m sure the code enforcement officers…Sonia: I’m sure they never check. But, I mean, the thing is, for you guys as architects – you’re obviously trying to comply with code, but – you’re trying to provide your occupants a healthy environment.Chris: Exactly right.Sonia: So, it’s really the spirit of the law that we’re going after tonight, I think.Chris: Absolutely. Well said.Phil: That’s right. So, when we talk about exhaust-only – that was the first example you gave: exhaust-only ventilation – so we have fans that exhaust directly from the house. And if we do that in a tight house, we somehow have to allow for air to come in. Because it’s so tight, where is it going to come in?Chris: Right.Phil: And we’ve used trickle vents in the past. We don’t do that anymore. Are there people still doing that? Sonia, do you specify that?Sonia: I don’t. I haven’t.Chris: That’s fair.Phil: A trickle vent is basically a hole in the wall for fresh air.Chris: Maybe it has a flapper on it, you know. And Bob’s your uncle. And usually it’s in the basement. The last time I even talked about doing a trickle vent, it was in the basement. It’s been a while since I’ve done a basement on a new house. So there you go.Phil: You and I, Chris, we talk a lot about cost and budget and we say, “Listen, if we’re going to change the world, we’ve got to keep our numbers down and our overall costs down.” So maybe exhaust-only, in some cases, is better than nothing.Chris: Right.Phil: And we put this hole in the wall and we deliver some cold air at certain places, but it’s not much.Chris: Right. And here’s what happens – and it happens on the cheap: People are trying to save money and they put in one of those nice Panasonic continuous exhaust-only fans and then they walk away and say, “I did it. Done. Great!” But, what they’re really doing is forcing the building to fail – unless they put in trickle vents, which they probably didn’t do. So then, they’re using their insulation as an air filter and it’s going to collect all that stuff, and they’re making all the windows and doors leak under that pressure.So that’s why I’ve philosophically despised the exhaust-only systems. Though, I recognize when it’s being used, if it’s just like a one-room kind of apartment place. I don’t know…Sonia: You’re also heating that – I know we’re going to talk later about energy recovery, but – you’re also heating that area.Phil: So, one general rule of thumb – if we’re having consensus here: Don’t do that anymore. Don’t worry about exhaust-only ventilation. Spend a few extra bucks and…Chris: Do a balanced system… right? So, Sonia, tell us about… What is your perfect balanced system?Sonia: My perfect balanced system is obviously balanced… right? It has the same amount coming in as going out. We’re controlling where and when and how much comes in. Typically we supply in the places where people need the air the most. Did you guys go to the Indoor Air Quality Conference?Chris: Uh, I missed that one.Phil: No, I did not. I feel guilty I didn’t go.Chris: I wanted to go.Sonia: It was excellent. They actually flew a guy out from Washington State who works for the Washington State University extension and he did a presentation. Apparently in Washington in 1991, they started requiring homes to ventilate. And so, they were one of the first states to adopt it, so they have all these years of data. So they actually went and instrumented several of these houses and they actually measured the carbon dioxide concentration…Chris: Oh wow!Sonia: …in master bedrooms at night, during the day, through all these forced-air systems, balanced ventilation. And I was shocked at how high the carbon dioxide gets in the bedroom at night, especially with two people in it.Chris: Really? Maybe that’s why you get sleepy…[Laughter]Sonia: So, my perfect system is supplying in the places where people are most likely to spend most of their time. So I personally would supply in the bedrooms and, of course, we have to exhaust out of kitchens and bathrooms anyway.Chris: Right.Sonia: You try and set it up to kind of think in 3D rainbow-vision and you want to mix the air through the house, so you get good, consistent air-mixing – good, consistent air quality – throughout the house. And that would be my goal.Chris: Nice.Sonia: From an energy perspective? I want it to have energy recovery so I’m using the outgoing air to heat or cool the incoming air. That’s my ideal system.Chris: Beautiful! I like how you use rainbow vision.Phil: Right! Sonia, you had me at rainbow.[Laughter]Chris: Alright. One thing I always like to say (and maybe this is my quote – either that or I’ve been saying it for so long I don’t know if I attribute this quote to somebody else, and that poor person is listening to this podcast and…)Phil: It’s probably me, Chris.Chris: Nope! I’m pretty sure it wasn’t you.Phil: If it was intelligent-sounding, it probably was someone else.Chris: Well alright, it goes like this: “A healthy house leaks and an energy-efficient house controls how it leaks,” which is very akin to what you just said. (I’m paraphrasing that).That brings us to ERVs and HRVs – which of course, anyone who’s on this site, they already know these things exist and what they basically are, but for the sprout who’s just tuning in for the first time: Basically we’re talking about tempering the incoming air with the exhaust air. And then we get into the eternal debate of which is better for your house or your situation: ERV (which is the energy-recovery ventilator) versus the HRV (which is the heat-recovery ventilator, which came first). And they started transferring not just heat but latent moisture as well, and then they said, “Well, let’s call it an energy-recovery ventilator.” So that’s the difference between an HRV and ERV.Phil: Or “enthalpy recovery.”Chris: Enthalpy recovery!Sonia: Nice!Phil: Oh, I remember it actually – to tell the difference in my head. I’ve got to say it again a couple of times…Chris: Twice a year.Phil: …and I still get confused. That’s right.Chris: Well, I’ve never really understood the technology behind an enthalpy wheel. You know those were some of the first ERVs we’d ever… In my brain – and Sonia, maybe you can tell me if this is crazy – I feel like there are layers of filters in there, and it just spins there. It’s like the air gets mixed in there… so much. See? I sound like a child.Sonia: Let’s just call it a magic box.Chris: it’s a magic box with a wheel, but I don’t know…Phil: So, the basic difference between the ERV and the HRV…Chris: Yeah.Phil: The ERV transfers the moisture. It’s the enthalpy-recovery ventilator. So: moisture in, and some of that moisture gets transferred back into the building through the outgoing air.Chris: Yeah.Phil: And HRV doesn’t do that. It pulls the moisture out, and there’s a condensing line.Sonia: And you’re thinking of it from a cold weather climate.Phil: Mm-hmm.Chris: True!Phil: That’s right! Thank you.Sonia: In an air-conditioning climate, it could be the reverse.Phil: Aha! Okay.Chris: But, do you still want that humidity recovery in reverse? Will an ERV shed its moisture to that…? No, what am I saying?Sonia: Will it dry?Chris: Yeah. Will it dry?Sonia: So, kind of the rule of thumb is that the ERV helps maintain whatever humidity you have in the house. So, regardless of whether it’s dry or wet outside, it will either dry the air or moisten the air, depending on your moisture gradient.Chris: Wow. What are we looking to maintain in the house?Sonia: Typically you want to stay between 30% and 60% [indoor relative humidity]. So, less than 30% relative humidity…Phil: Pretty sad, yeah.Sonia: Yeah, right. You tend to dry out… right? So, nose bleeds, it’s uncomfortable, dry skin, static electricity. And above 60%, now we’re getting into building science issues where we’re looking at condensation, potentially, on cold surfaces and also, in a cooling climate, it starts to get uncomfortable…Chris: Clammy, yeah.Sonia: Clammy.Chris: Which no one likes.Phil: No. Interestingly, on NPR they were giving the weather report the other day and I heard the weatherman refer to the weather as clammy, as if it was a technical term.[Laughter]Chris: That’s fantastic.Phil: I just thought that was outstanding!Chris: On NPR, straight-faced?Phil: On NPR.Sonia: Everything’s straight-faced on NPR.Phil: “Warm and clammy today.” I just loved it!Chris: Wow! So then, the real question I think that some people have there and they’ve been waiting for us to say it now is, “So, which is better? What should I use, Sonia?”Phil: “ERV or HRV?”Chris: “Which one’s better?”Sonia: It depends!Chris: Okay.Sonia: So, it depends who your clients are. So everything, I know everyone wants a rule of thumb, but…Chris: Yeah. What’s your rule of thumb?Sonia: But the rule of thumb is you really have to assess the situation. So, if I’m building a 4,000-square-foot house for a single, older couple, I probably want an ERV because they’re not making a lot of moisture.Phil: They’re pretty dry anyway.[Laughter]Sonia: They’re dry. They’re desiccated.Chris: You and I are this close to being there, too, buddy.Sonia: And they’re also susceptible; they’re more susceptible to dry skin, etcetera. Whereas, like Phil had said earlier offline, “If I have a small house that’s got three teenage boys who shower twice a day, and my wife is Italian and she likes to cook pasta all day, I might actually go with an HRV.”Phil: And teenage boys take really long showers, by the way. That’s all I’m saying.Chris: That’s all you need to say.Phil: Yeah.Chris: Yeah, I gotcha. So, it depends on your client, and also your climate? Do you think climate plays into that choice? Or do you think it’s really about the humidity you’re generating inside that makes you make that decision?Sonia: Typically, it’s the humidity you’re generating inside. I would say, probably 80% of the time, an ERV is the right choice. You just need to be ready for those times when you have a high-humidity generating household…Chris: Right.Sonia: …and consider an HRV might be the right course of action.Chris: Right. And now we’ll probably get into the different ways to do makeup air and exhaust air. This is about tying your bathroom exhaust into an ERV or HRV system. It is one of those things that people either despise or they love, depending on how energy-efficient they are trying to be. What’s your take on that?Sonia: Tie it in.Chris: Tie it in! Alright. Very good.Phil: So, Sonia, are there situations where you would just say, “We need a dehumidifier”?Sonia: Absolutely. Typically not where we are. But, when you get down South. And the other thing to think about, as we’re building these more-efficient [buildings] – and Joe Lstiburek has a great presentation on this – we need very little cooling now. But the problem is, when we’re not cooling, we’re not getting dehumidification. So, if you’ve oversized your air-conditioning system, it’s going to cycle on and off, and in between you’re not going to get dehumidification. So really, a separate dehumidification system is really warranted as we start to get into more tighter and efficient houses.Chris: Right.Phil: Sounds expensive.Sonia: Not necessarily.Chris: So, I’m in a super-tight house (1 ach50, whatever). So you’ve got this three-bedroom house, and you’ve got an ERV system in it. How much do you think that costs? You know… tight house.…Phil: That’s a good question. I’m going to throw out a number.Chris: Do it!Phil: Five grand?Chris: Five grand. That felt good. That felt alright. Yeah, we’re nodding. So, alright. That passed the peer test there.Phil: Yeah. There’s labor. The actual boxes – that’s not that expensive.Chris: Right. You’re running ductwork, which probably, in these systems (if you’ve got a nice system), we’re talking about those cool Zehnder tubes…Phil: Well, if you’ve got the Zehnder. I mean, the Zehnder boxes start at $2,200 or something like that.Chris: Yeah.Phil: Over two grand for those. But you can get a simpler box from Venmar for half that price.Chris: Sure.Sonia: But, you’re also talking efficiency, right?Chris: Right!Sonia: So here’s the big deal with efficiency… right? So, if I get a sweet-ass Zehnder…Chris: Yeah!Phil: That’s right!Sonia: …which we’re putting in our passive house… (We haven’t fired it up yet.) I’m talking… what, 92% efficient? So, the air coming out is almost the same temperature as the air going in.Chris: Which is amazing!Sonia: It’s totally amazing. But, I’ve done some forensic investigations in some houses that decided to, at the last minute, go with a much less expensive heat-recovery ventilator. So what’s happening, on those cold Maine days, we’re getting air that could be 45, 50 degrees – which is not necessarily a problem if you put it somewhere where it’s not going to fall right on you.Chris: Right.Sonia: So, if you have a basement and you bring it in, or you put it somewhere where it’ll mix before it hits the occupants. Not necessarily a problem. But if you have 45-degree air coming in, in a 70-degree house – and it’s dumping right on you watching TV – that’s going to be unacceptable.Chris: While you’re trying to sleep in your bedroom.Sonia: While you’re trying to sleep.Chris: Right on your head.Sonia: So you really need to give some thought [to equipment that is] more expensive, higher performance, more comfort – depending on where you can put it in the house.Chris: Right. Oh, maybe we should talk about the Coanda effect.Sonia: Coanda.Chris: Oh, is that how you pronounce it?Sonia: That’s how I pronounce it, but I could be wrong.Chris: Coanda effect. This is what I’ve been told: that you are supposed to – almost all of your supply should be up high, so that the air can…The Coanda effect is the air’s tendency to cling to the surface area adjacent to that volume of air that is moving. If you just blow it out into the center of the air, if it’s cool, it’ll just drop. But, if you blow it next to a ceiling’s surface, it will kind of run along the surface, so it will spread out more. So, you’re supposed to supply high.Phil: Aha!Chris: Is that too geeky for this podcast?Phil: That’s really good.Chris: Alright.Phil: Great visuals.Chris: So air clings to surfaces, so as you’re thinking about where you’re putting these ducts (diffusers – that’s what I meant to say – where you’re putting these diffusers), you’ll want to think about how it’s going to move. Right?Sonia: That’s perfect. You want to think about how it’s going to mix.Chris: Right. And you were talking about supplying in bedrooms. And then Phil, before we went on air, we were discussing someone else’s alternative point of view, which was supplying…Phil: We’ve been working with Robb Aldrich from Steven Winter Associates. And I love Robb — super-smart guy; he does the testing of this in real time. We’ve been using him for one of our projects and he believes in something a little bit different. He does exhaust-only from all the bathrooms. Supplies in the hallways, but exhausts out of the bedrooms. And his theory is that it helps with the mixing of the air and the thermal comfort. If we’ve got a single point source or if we try to heat the entire upstairs in a small house that’s got three bedrooms upstairs – maybe there are some holes in the walls or vents or there’s some way for the air to get through it – that this will actually help with the thermal mixing.Sonia: So when you say, “bathroom exhaust-only,” you’re saying direct exhaust.Phil: Direct exhaust. Thank you, Sonia. Right. That has nothing to do with the HRV, it just goes directly out. It is not tied into the system.Chris: Gotcha.Phil: There are contaminants and there is a lot of moisture. Do not put that back into the system at all.Chris: Interesting. So, he’s supplying near the point source of heat, and using an exhaust-only…Phil: Not an exhaust-only, no. Just using exhaust for the HRV or ERV in the bedrooms.Chris: Gotcha. So, supply carries that point source out…Sonia: And that’s a great technique for mixing. So we’ve talked about: if you have a lower-performance ERV or HRV – so the air’s coming in cooler – if you bring that fresh air in right next to your heat source.Chris: Right.Sonia: It’s going to condition that air before it gets to the people, so it’s actually a great technique.Chris: Alright.Phil: I have one thing that I want to ask Sonia about, because I know there’s a simple way to do this. (I still have to do the math in my head, and maybe you do, too.) But when I look at the efficiency of the ERV or the HRV, I always think, “What does 92% mean versus, you know, 85%?” That sounds pretty good to me.Chris: In terms of money, Phil?Phil: No! In terms of comfort.Chris: Yeah. Oh, okay.Phil: If you can do the simple math and say: Hey listen, it’s 70 degrees inside, and it’s zero outside. When that air mixes, is it 35 degree air (if it’s 50% efficiency)? And if it’s 92% [efficient], suddenly is it 92% of 70 degrees and that’s what we’re measuring? If that’s the case, we’re about 62-degree air coming in. Does that sound right?Sonia: It’s actually called the mixing of air streams. What you have to account for is, sometimes it’s not perfectly balanced… right?Chris: Right.Sonia: So, for example, if you run your monster range hood…Chris: Yeah.Sonia: …and you’re actually pulling more outside air in than you’re exhausting out…Chris: Right. We’re going to take a break and then we’re going to talk about…Sonia: That balance changes… right?Chris: Yeah.Sonia: So does the temperature coming in. The other thing is, you have to look at the performance curve of your energy-recovery ventilator. And sometimes the performance changes based on airflow or outside temperature. So what might be at its best performance for an 85%-efficient ventilator might be closer to 65% at a certain performance point.Phil: Hmmm.Sonia: So you really need to think about where you are operating your equipment and then do the math. Because a 65%-efficient ventilator on a minus-5-degree day is going to bring in 40-something degree air.Chris: Chilly.Sonia: Yeah.Phil: This, Chris, is why we hire engineers.Chris: I know. Because I don’t trust your fuzzy little…Phil: I know. My rule of thumb… right?Chris: “If it’s a 90%, and it’s a 60-degree day…”Phil: Sonia has many more thumbs than I do.Chris: “…and there’s a train traveling from Cincinnati to…”[Laughter]Alright. I can tell… I think we ought to go refresh our drinks. Call this the end of Part One. Come back with Part Two, and come back with the awesome Sonia Barrantes.Sonia: That’s very sexy.Chris: Oooh! Thank you. She’s flattering me. That was probably awful. Anyway, so don’t go anywhere. We’ll be right back. PODCAST: Ventilation for Your Tight House — Part 2PODCAST: Don’t Be an Air Hole! — Part 1PODCAST: How to Choose The Right Mechanical SystemPODCAST: The Green Architects Chat with Allison BailesPODCAST: Net-Zero-Energy Homes, Part 1: Concepts and Basics Designing a Good Ventilation SystemHRV or ERV?A Balanced Ventilation System With a Built-In Heat PumpAre HRVs Cost-Effective?Ventilation Doesn’t Happen in a VacuumBalanced Ventilation Is Appropriate for All Climates In this episode we are assuming that you are preparing to design or build a super-tight house and you’re interested in the best way to provide fresh air for its occupants.In the old days, you’d just “let the house breathe” [shudder]. But those days are long gone. A healthy house leaks, while an energy-efficient house controls how it leaks — and this episode is all about the latter.With all of the advances in air-sealing methods, ventilation equipment, and the myriad of system choices available, what once was easy is now far more difficult. Luckily for us, we have Sonia Barrantes (a mechanical engineer, Naval flight officer, and fiddler) as our guest to help guide us through the decision-making process.I should mention that we suffered some technical difficulties just prior to recording. As a result the sound quality is slightly off and there’s some audible background noise. But the good news is that we were able to record a decent episode and had a great time with Sonia (and Phil’s “Sweet Tart” cocktails). RELATED CONTENT Here is the link to Ventilation for Your Tight House — Part 2.
What it Takes to Build a Highly Secure FinTech … Role of Mobile App Analytics In-App Engagement The iPhone 5S has been in the public’s hands for one weekend, and already the battle cry has gone out: who can be the first to hack the new phone’s Touch ID fingerprint scanner?By Saturday one group, known as the Chaos Computer Club, claimed that their biometrics hacking team had “successfully bypassed the biometric security of Apple’s TouchID using easy everyday means. A fingerprint of the phone user, photographed from a glass surface, was enough to create a fake finger that could unlock an iPhone 5s secured with TouchID.”Watch the video see how the process, which involves “everyday” items like transparent sheets, a laser printer, pink latex milk and white wood glue can bypass the biometric sensor on the new iPhone 5S.This type of methodology, which has been around since the first season of Alias, is pretty much par for the course for biometric hacks, as are far more gruesome methods that involve coercion and dismemberment to get the fingerprint you need. But if it works, it works.The stakes are rather high. Not only are hackers seeking the glory of being the first to crack through Apple’s vaunted biometric security, but there’s also an open bounty of about $16,000 being offered by the site Is Touch ID Hacked Yet for the first proved method to hack the iPhone 5S system.The bounty site is aware of the German group’s technique, though it is waiting for video confirmation that the method can be duplicated by lifting a print from any object, such as a glass or cup.“We hope that this finally puts to rest the illusions people have about fingerprint biometrics. It is plain stupid to use something that you can’t change and that you leave everywhere every day as a security token”, said Frank Rieger, spokesperson for the Chaos Computer Club.Image and video courtesy of Chaos Computer Club. Related Posts Tags:#biometrics#iPhone 5S#security#touch id brian proffitt Why IoT Apps are Eating Device Interfaces The Rise and Rise of Mobile Payment Technology