Live updates: Warriors vs. Nets, Sunday at 2 p.m.

first_imgClick HERE if you’re having trouble viewing the gallery on your mobile device. Join us for live news and analysis Sunday at 2 p.m. when the Warriors look for their fourth straight victory when they take on the Nets in Brooklyn.Golden State, which has beaten Brooklyn six straight times, is coming off a 128-100 win over the Knicks on Friday. That win featured Kevin Durant’s epic fourth-quarter flurry that produced 25 of his 41 points.Durant’s scoring helped the Warriors go on a 42-9 …last_img read more

Warriors’ Klay Thompson “good to go” vs. Denver

first_imgKlay Thompson subscribes. You can too for just 11 cents a day for 11 months + receive a free Warriors Championship book. Sign me up!OAKLAND — Klay Thompson emerged from the trainer’s room and walked to the interview table at a brisk pace. The Warriors’ guard then offered encouraging news about his previously sore right knee and if he can play when the Warriors (44-20) host the Denver Nuggets (43-21) on Friday at Oracle Arena.“It’s good,” Thompson said. “Good to go. Just got to keep it moving. …last_img read more

How to Look at a House like a Building Scientist (Part 1: Air)

first_imgThis article is the first in a three-part series on how to use various diagnostic tools to sleuth out problems in buildings. The work I do for Building Science Corporation (Joe Lstiburek’s company, for those who don’t know) involves forensic investigations of moisture-related (or similar) building failures—in other words, sleuthing out problems in buildings. Despite the fancy name, this typically involves crawling around the bowels of commercial and residential buildings to look at the problem areas and determine the causes. These problems may include strange odors that seem to emanate out of nowhere, windows that leak water during rainstorms, indoor swimming pools with rotting walls, freezer warehouse buildings with icicles growing out of the ceiling, mega-mansions with out-of-control humidity levels that are damaging the art collection, and moldy and wet crawl spaces. To solve these problems, a set of eyes and an understanding of building physics are the most important tools. But there are many clues that are not visible—thus the use of building diagnostic tools: the focus of this article. This series will cover a selection of my most-used tools for this type of building science diagnostic work. This is not a comprehensive survey of the available tools—but a look at my go-to items for day-to-day investigations. Also, I am deeply indebted to all of the other practitioners who have shared their knowledge, instruments, and tips/tricks—I can only hope I’m doing a little bit to pay it forward here.RELATED ARTICLESBlower Door BasicsDuct Leakage TestingDiagnostic Tools for Energy-Minded RemodelersEssential Energy-Audit EquipmentAn Introduction to Pressure Diagnostics The series will be broken down roughly into the following topics: Part 1: Air. Using devices that measure air leakage (such as blower doors and duct blasters), differential pressures, and airflow. Part 2: Heat. Using infrared cameras and temperature meters to find thermal bridges, sometimes combined with airflow tools to find air leaks. Part 3: Water. Using moisture meters, water-testing windows, and demonstrating drip edges and slope with squirt bottles. Why air measurements are important Controlling the air inside the building—by limiting air leakage—is critical for conditioning the air, and therefore affects comfort and energy use in buildings. But in addition to carrying heat, air leakage often carries moisture with it, which means that air leaks can lead to a variety of durability problems. Examples of air leakage problems include growing mold on roof or wall sheathing due to outward air leakage in cold climates, or condensation on cold ducts or pipes due to inward air leakage in hot-humid climates. In addition, I’m seeing more and more indoor humidity problems up and down the East Coast, and air leaks are a part of them. When I hear folks complaining about “new buildings being too airtight,” I let them know that I’ve investigated far more problem buildings that were too air leaky rather than too tight. Of course, air is invisible—although you can feel it moving from one place to another, diagnostic tools can tell you a lot more. Air leakage testing A blower door (Minneapolis Blower Door; Retrotec) is a calibrated fan used to measure air leakage in buildings; it is typically installed in a fabric shroud mounted in a doorway (Figure 1). The fan is used to depressurize the building to a known test pressure (typically 50 Pascals), and the airflow (cubic feet per minute or CFM) required to reach that pressure is a measurement of the building’s total air leakage (reported as “CFM at 50 Pascals” or “CFM 50”). Current codes require airtightness testing (see R402.4.1.2 of the IECC). Blower doors are used for both houses and large commercial buildings (although more fans are needed for the latter). Duct testing equipment (for example, Duct Blaster) is used in a similar manner to test duct airtightness. The calibrated fan is connected to a ductwork system, the intentional holes in the system (i.e., registers and grilles) are sealed, and the airflow required to reach a test pressure provides a measurement of leakiness. This series is not intended as a full discussion on the basics of measuring air leakage and how to use the equipment: manufacturers such as the Energy Conservatory and Retrotec have a wealth of information—including great instructional videos which you can find here and here. Incidentally, Duct Blasters are useful for more than ductwork testing. They can also be used to test airtightness of small buildings (such as the cottage in Figure 2), very airtight buildings, or individual dwelling units in multifamily buildings. For reference, a Duct Blasters can test up to 1350 CFM 50, while a Minneapolis Blower Door maxes out at 5350 CFM 50. Figure 1: Testing a house with a blower door. Figure 2: Testing a cottage with a Duct Blaster. Blower doors and pressure difference measurements In addition to testing the overall building’s air leakage, we can use this equipment to create pressures in a building, and learn more about leaks in certain areas or zones. For instance, conditioned, unvented attics (with insulation and air barrier at the roofline), are becoming more common as a way to keep ductwork within the conditioned space and to insulate complicated rooflines. When testing these buildings for airtightness, we often measure the pressure difference (known as delta P or ΔP) across the attic hatch. The ideal condition is shown in Figure 3: with the house at -50 Pascals (Pa) relative to outdoors, if the ΔP across the hatch is 0 Pa, it means that the attic is also at -50 Pa. This indicates that the attic is 100% “inside”—the depressurization of the main portion of the house extends up into the attic, and it is all operating as a single zone of air. Figure 3: Depressurized house with an unvented, conditioned attic, 0 Pascals across ceiling (good). A similar measurement is shown for a vented, unconditioned attic in Figure 4. In this case, the attic is intentionally connected to outdoors with soffit and ridge vents, and we want the ceiling plane to be as airtight as possible. With the house at -50 Pa relative to outdoors, if the ΔP across the hatch is also 50 Pa, it means the attic is at 0 Pa—i.e., the same pressure as outdoors. This suggests the attic is well-vented and/or the ceiling plane is relatively airtight—all excellent for performance. Figure 4: Depressurized house with a vented, unconditioned attic, 50 Pascals across ceiling (good). But most of the time, we see conditions other than these two extremes. For instance, take that same unvented attic we looked at in Figure 3. If we ran the house at -50 Pa relative to outdoors, and the pressure difference across the hatch was 25 Pa (Figure 5), it means that the attic is at -25 Pa. This indicates that the attic is “halfway” between inside and outside. In more precise language, it means that the area of the holes in the roof (from attic to outdoors) is equal to the area of the holes in the ceiling (attic to house). Typically, this is a problem. It suggests that there are big air leaks from the unvented attic to outdoors that we need to fix, given that the ceiling plane is usually not intentionally air sealed in these houses. This usually involves crawling around the attic looking for signs of air leakage. Also, the amount of airflow coming down through the hatch can give you a first gut feel on how an unvented attic is performing—the ideal situation is next to no air from opening the hatch, and the worst case is a gusher of air. Figure 5: Depressurized house with an unvented, conditioned attic, 25 Pascals across ceiling (not good). Another example of this technique is shown in Figure 6: during a depressurization blower door test, we taped off the fireplaces with cardboard to avoid sucking ash into the house. Measuring the pressure drop or ΔP across the cardboard showed that the dampers are not really doing much air sealing, and that the fireboxes were essentially outside. This contributed to the major summertime air leakage in this house, and resulting difficulty of keeping interior humidity under control. In Figures 6-10, I’m using the Energy Conservatory DG-700 Pressure and Flow Gauge. It has since been discontinued. The new model is the DG-1000 Digital Pressure and Flow Gauge. We haven’t upgraded to the DG-1000 yet, but they’ve been out for a while, and well, work. Figure 6: Measuring ΔP across a fireplace seal. Figure 7: Measuring ΔP at an electrical outlet. Figure 7 shows a ΔP measurement at a party wall in a multifamily building—these “burn away” walls are notoriously difficult to air seal and are a problem for getting these buildings airtight. By removing the outlet cover plate and measuring the ΔP across the drywall, we could figure out the problem areas at the party wall, which ended up being the garage connection and the HVAC closet. There is an entire set of techniques for using these types of ΔP or “differential pressure” measurements, called zone pressure diagnostics, but that’s beyond what we can cover here. Indoor-outdoor pressure measurements Air pressures define which way the air moves, and how quickly. Therefore, measuring air pressures during normal building operation can also provide clues to problem conditions. For instance, in southern climates, “buildings that suck” can lead to huge moisture problems from pulling in hot, humid outdoor air. It’s also useful to have a bit more of an intuitive understanding of the pressure measurement of Pascals/Pa that we use. It is a very small unit—one Pascal is about the weight of a fly on the area of a penny. Also, 1 psi is 6895 Pa. Correctly-operating houses normally operate in the 3-5 Pa range, the blower door and duct blaster tests are run at 50 Pa and 25 Pa respectively, and when buildings are pressurized to exclude contaminants, 10-12 Pa is a typical range. When I deal with commercial building facilities managers and ask them whether their building is running at a positive or negative pressure, they sometimes respond, “they added up the airflows and it should be positive.” My response is: let’s measure it directly to figure it out—and plenty of times, adding up the airflows gives the wrong answer. Indoor-outdoor pressure measurements are simple if you can find an operable window or doorway. These ΔP measurements are also important for residential work—for instance, if they installed an oversized kitchen range hood in a custom house without a makeup air system we can measure the net effect. Also, very airtight construction with unbalanced fans (e.g., exhaust-only ventilation) can cause problems. Figure 8 and Figure 9 show measurements of indoor-outdoor ΔP at a door or window. Before anyone gives me grief about the daylight you can see at the window sill, that only affects the ΔP measurement if a house is very airtight, and doesn’t matter for most of these types of measurements. Figure 8: Indoor-outdoor ΔP at a doorway. Figure 9: Indoor-outdoor ΔP at a window. But there are times when a one-time measurement isn’t enough to fully understand what is going on. For instance, on a windy day, it can be next to impossible to tease out the effect of operating fans on house pressures. Also, it can be useful to get a log of operating many mechanical systems (kitchen exhaust, bath exhaust, dryer) in various combinations to determine their effect. In those cases, you can connect Energy Conservatory manometers (pressure meters) to a computer (Figure 10) and use free TECLOG software to graph the pressures in real time, and to observe the effect of changes visually (Figure 11). This creates a computer file that you can refer to and run calculations on later. Figure 10: Using TECLOG to log pressures. Figure 11: TECLOG real-time pressure graph. Air flow indication and measurement In addition to putting a number on pressure differences, it’s often useful to demonstrate where air leaks are, and which way airflow is going. The typical go-to solution is a smoke generator or a smoke pencil—one trick from my colleagues is to connect a vaping pen to a squeeze bulb (Figure 12). I have also heard good things about Cirrus Outdoors smoke generators, but haven’t tried one myself. Figure 12: Smoke pencil from a vaping pen. Figure 13: Kestrel wind (air velocity) meter. To get more precise, wind or air velocity meters (such as Kestrel impeller-based meters, Figure 13) can measure these flows—typically in feet per minute/FPM. You can estimate flows out of HVAC registers by measuring airspeeds and the opening area (called a “traverse”) with these meters. However, I’ve pretty much replaced my Kestrel meter with a tool from the HVAC world—a hot wire anemometer (Figure 14 and Figure 15, Fieldpiece Instruments STA2 In Duct Hot-wire Anemometer). A hot wire anemometer has a fine wire that is heated above air temperature, and the rate of heat loss/cooling measures the airspeed. This tool is exceptionally useful because it has an extension probe that lets me “feel” for air leaks out of arm’s reach. A typical use is to depressurize the building, and put the probe on suspected air leakage locations. Figure 14 is the inside of a metal panel building—this panel seam was leaking despite the double-gasket design. Figure 15 shows measurements of air leaks around a window sill with the trim removed: hot, humid air was getting pulled from the masonry cavity at these openings under the window trim, condensing, and dripping. Figure 14: Hot-wire anemometer air velocity meter. Figure 15: Hot-wire anemometer air velocity meter. HVAC air flow measurements Getting more into the HVAC world, measuring air flow into grilles/exhausts and out of registers/supplies is often useful, especially when doing commissioning (or startup) measurements—is your equipment providing the flow that they said it would? Also, these tools come out when we’re trying to diagnose HVAC-related problems, like hot or cold rooms. The equipment that an HVAC technician would use is a flow capture hood (Figure 16)—it can be used for either supplies or returns (up to a limited size). As a warning, there are plenty of case studies showing that you get wonky results with problems like off-center placement, a register that “swirls” the airflow, or even their effect of “choking off” the airflow by putting the flow hood on the register (see “How Accurate is Your Air Flow Capture Hood Measurement“). A useful tool for exhaust fans is a “flow box” (Energy Conservatory Exhaust Fan Flow Meter, Figure 17) It’s a box with a variable opening, and measuring the pressure inside the box provides the exhaust flow. It is light, quick, reliable, and works well. Lastly, if you’re looking at exhausts, the “toilet paper test”—despite its simplicity—gives some useful information. If the toilet paper sticks to the fan face, you’re probably getting a decent airflow. Figure 16: Flow capture hood. Figure 17: Exhaust fan flow meter. -Kohta Ueno is a senior associate at Building Science Corporation. Photos and illustrations courtesy of the author.last_img read more

California DMV to authorize fully driverless vehicles on roads

first_img5 Ways IoT can Help to Reduce Automatic Vehicle… Tags:#autonomous cars#California#DMV#driverless#Google#Self-Driving#Waymo David Curry For Self-Driving Systems, Infrastructure and In… Related Posts center_img Break the Mold with Real-World Logistics AI and… The California Department of Motor Vehicles (DMV) has introduced new legislation to legalize fully driverless vehicles in the state. It follows similar legislation passed in Michigan late last year.Automakers and tech firms are required to have a driver in the front-seat at the present time, to take control if the vehicle malfunctions. In California, manufacturers also need to send detailed travel logs to the DMV.See Also: Google asks judge to halt Uber’s self-driving program“This is really the next step to moving forward the driverless testing and also the public use,” said DMV spokeswoman Jessica Gonzalez. “A number of manufacturers will be ready to move forward with driverless testing over the next year to make this happen.”Cars will not be completely autonomous, an engineer would still need to keep watch of the vehicle from a remote location. The DMV did not say if it needs to be one-on-one monitoring, or if one engineer can monitor a fleet of vehicles.The DMV also wants the police and other enforcement agencies to be able to take control and move an autonomous vehicle from the road, if it is malfunctioning.People, get ready…to climb aboardWhile the rules have not been finalized, there is some talk of the DMV allowing regular commuters to travel in the autonomous vehicles, similar to rules in Arizona, Michigan, and Pennsylvania.The new rules will be enacted by November at the earliest, giving manufacturers more than half a year to prepare for the transition. We would assume some of the 27 manufacturers in the state are ready to move to this next level of autonomy.Google’s self-driving division Waymo is supposedly far ahead of other self-driving firms in California, according to a California automotive regulator. Even so, there have been accidents caused by the autonomous vehicle last year, showing that the technology is far from perfect. IT Trends of the Future That Are Worth Paying A…last_img read more

Notley says she wants progress within days from feds on BC pipeline

first_imgEDMONTON – Alberta Premier Rachel Notley says she wants progress within days from Ottawa in resolving a pipeline dispute with British Columbia, or her government will look at further retaliatory measures.Notley, who has already suspended talks to buy B.C. electricity and has banned B.C. wines from Alberta, reiterated Monday that B.C.’s actions on the Trans Mountain pipeline are illegal and must be reversed.“We do not seek an escalation, but if B.C. continues to insist that they have rights to attack Alberta’s economy that they don’t have, we will have no choice (but) to respond,” said Notley.“It’s in British Columbia’s power to put this issue to rest.”Two weeks ago, B.C. Premier John Horgan’s government announced it was looking at restricting expanded flows of oil into the province pending a review to make sure that such spills could be properly cleaned up.The move would have a direct impact on the Trans Mountain pipeline expansion, which was OK’d in 2016 by the federal government but has faced delays and opposition in B.C. ever since.Horgan says the restriction is in keeping with the province’s responsibility to keep its coastline and waterways safe.But Notley said it’s clear constitutionally that Ottawa has the final say on interprovincial projects like pipelines.She said Horgan and his government can follow the law, “or they can dig in their heels and pretend they are a separate country with powers to make whatever laws they want with no regard for the Constitution or the views and rights of other Canadians.”Prime Minister Justin Trudeau’s government has been meeting with B.C. counterparts in recent days to resolve the impasse.Notley has announced she has suspended talks with B.C. to buy $500 million worth of electricity and has halted imports of B.C. wine, worth about $70 million a year. She has also struck a task force to look at other ways to respond to incursions from B.C., and from any other jurisdiction, on its core industry.Notley said she will give the feds a little more time to resolve the issue, but not too much.“When I say we’re going to give them a little bit of space, we’re talking days, not much more than that,” she said.Notley said she hasn’t ruled out more extreme options such as finding ways to restrict oil to B.C. or refusing to transport gas from that province, but said she doesn’t want to harm Alberta’s interests in the process.“You cut off shipments to B.C, it’s Alberta’s economy that feels that more than B.C.’s,” she said.Kinder Morgan Canada has approval to triple capacity on the existing Trans Mountain line, from Edmonton to Burnaby.It’s a critical lifeline for Alberta’s, and Canada’s, oil industry as it seeks better prices globally for its product and offsets steep discounts due to tight pipeline capacity on the North American grid.Trudeau’s government has said the project will proceed.Alberta United Conservative Opposition leader Jason Kenney has urged Notley to reconvene the legislature for an emergency debate on the issue.Notley dismissed that.“I think that what we need to do is not be talking to each other inside this building, but rather speaking to people across this country about the import of our position, and so that’s what we’re going to do.”She said on Tuesday her government will roll out an online campaign “so that Albertans and Canadians who want to voice their support for a strong economy and a strong environment can do so to the B.C. and Canadian governments.”last_img read more

CRYING MONTREAL KIDS SHOWN HORROR FILM INSTEAD OF DETECTIVE PIKACHU

first_img LEAVE A REPLY Cancel replyLog in to leave a comment Advertisement YOU HAD ONE JOB!!!Of all the movies not to show a bunch of kids excited for Detective Pikachu — the child-friendly tale of a cute yellow creature — a jump-scare-laden horror flick about a ghost who is trying to snatch youngsters probably tops the list.That, however, is what happened at a Montreal theatre last week.The screening, witnessed and tweeted by Screen Rant‘s Ryan George, began with trailers for The Joker and Child’s Play — and also tears.NOW IT’S CHUCKY OH NO CHILDREN OH NO pic.twitter.com/P2DkGmglDJ— Ryan George (@theryangeorge) May 9, 2019 This image released by Warner Bros. Pictures shows Roman Christou, left, and Jaynee-Lynne Kinchen in a scene from “The Curse of La Llorona.” (Warner Bros. Pictures via AP) ORG XMIT: CAET486 Advertisement If you’re thinking that horror film trailers shouldn’t come before Detective Pikachu, you’re right.But the trailers, in their twisted way, were a suitable coming attraction insofar as the movie that followed had nothing to do with Pokemon; it was The Curse of La Llorona, the latest entry in The Conjuring’s horror franchise.OH MY GOD THEY’RE PLAYING LA LLORANA INSTEAD OF DETECTIVE PIKACHU pic.twitter.com/j4qX6fAf95— Ryan George (@theryangeorge) May 9, 2019“La Llorona is arguably the most frightening appearance of the supernatural in all The Conjuring instalments, besides Valak, the demon nun,” IMDB’s guide for parents says of the film, which is rated 13+ in Quebec. “La Llorona offers a large amount of effective jump scares, her kills are quite emotional and disturbing.”Eventually the Detective Pikachu audience was relocated to a theatre actually playing Detective Pikachu.We’ve all been moved to another theatre where Detective Pikachu is just paused? At least there aren’t any more murders on-screen pic.twitter.com/tEid3ThPY4— Ryan George (@theryangeorge) May 9, 2019Honestly, this whole affair could serve as the premise of a future Conjuring movie — just don’t take a bunch of Pokemon-loving kids to see it.MONTREAL GAZETTEcenter_img Advertisement Login/Register With: Facebook Twitterlast_img read more