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to bring about or cause a specified condition in (a person or thing) by use, deterioration, or gradual change: You'll wear that outfit to rags if you don't take better care of it.Years of hard labor had worn him to a shadow.

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Microscopic wear and polish on a worn section of the Tabun stone resulted from it having been ground or rubbed against relatively soft material, such as animal hides or plants, the scientists conclude in the January Journal of Human Evolution.

Vehicles emit inhalable particles from two major sources: the exhaust system, which has been extensively characterized and regulated; and non-exhaust sources including brake wear, tire and road wear, clutch wear and road dust resuspension. The non-exhaust sources have not been regulated because they are difficult to measure and control. However, with increasingly stringent standards for exhaust emissions, the non-exhaust fraction has become increasingly important. Model predictions (both MOVES and EMFAC) suggest that traffic-related emissions of both PM2.5 and PM10 will eventually be dominated by non-exhaust sources.

CARB awarded Eastern Research Group (ERG) and LINK Engineering a contract to derive speed-dependent emission factors using a brake dynamometer which minimizes PM losses and has zero interferences. Six light-duty vehicles, including both passenger cars and trucks, were tested on this dynamometer. ERG/LINK varied brake materials, vehicle loads, and driving behavior to explore variations and define the most important parameters affecting brake wear PM.

The results of this project have been used to constrain brake wear emissions rates in EFMAC2021. More information on this study can be found in its final report (link), its Research Seminar (link), and in the following journal articles:

CARB has also collaborated on a CalTrans-led project that characterized brake wear emissions from heavy-duty vehicles (HDVs). This project both quantified brake wear PM emission rates from HDVs and analyzed the chemical composition of this PM. CARB staff contributed to this effort by serving as technical experts. The final report is now available. These results have already been used to constrain HD brake wear emission rates in EMFAC2021, and will be used in real-world source apportionment studies that estimate the portion of ambient PM that originates as HDV brake wear.

CARB has awarded the University of California, Riverside (UCR) a research contract to investigate the impact of non-exhaust emissions on near-roadway environments. UCR has assembled a team of experts to sample roadside emissions in high detail in order to investigate the impact of brake wear, tire wear, and road dust as it relates to other vehicle emissions such as tailpipe emissions and background sources in Southern California. In early 2020, they collected samples at sites characterized by different fleet mixes and made real-time as well as time-integrated particulate matter (PM) measurements (below). This has allowed the researchers to collect both physical and compositional information of PM in high detail which can now be analyzed to distinguish sources.

As part of CARB's efforts to better characterize non-exhaust particulate matter, staff are working at the Haagen-Smit Laboratory to adapt a unique emissions testing platform to measure brake wear PM.

Staff utilized one of the running loss sealed housing for evaporative determination (RL-SHED) chambers. The RL-SHED is a sealed chamber featuring a full chassis dynamometer where vehicle exhaust is isolated from the inside of the chamber, and can be used to observe non-exhaust sources of PM, particularly from brake wear. A similar study was performed previously and the results of that study are available here.

The results from both of these tasks will be made publicly available in the future and will set the standard for laboratory measurements of brake wear PM which will be used by various international stakeholders including industry and academic researchers. CARB is collaborating with the JRC on this project, by contributing both technical expertise and sharing lessons learned from similar projects in California. Specifically, CARB staff have provided information on the brake dynamometer study discussed above, including the California Brake Dynamometer Cycle developed by that study.

These are comfortable, easy-to-wear options, but require additional maintenance. As with other life jackets, inflatables should be worn at all times. Learn all about inflatable life jackets by watching this US Army Core of Engineers video.

Regularly check your life jacket for wear and tear and service inflatables (replace cartridges, etc.). Always dry and clean your life jacket after each use. Learn about cleaning and storing your life jackets at lifejacketassociation.org.

You may wear a hat or head covering, but you must submit a signed statement that verifies that the hat or head covering is part of recognized, traditional religious attire that is customarily or required to be worn continuously in public or a signed doctor's statement verifying the item is used daily for medical purposes.

Material and methods: During a recently published study with a follow-up of 1 year, all participants performed a similar basic home-based oral hygiene regimen. Hence, they were instructed to brush for 2 minutes twice daily according to the Bass method technique and using a standard dentifrice containing sodium fluoride. Toothbrushes were turned in every 3-month, and the degree of wear was scored. The mean plaque score data were additionally analysed and correlated with wear scores of the toothbrushes.

Results: For analysis, for each of 172 individual participants, a set of three identical, 3-month-old used toothbrushes were available. Toothbrush wear varied widely between participants. However, per patient, the 3-month wear status of the three evaluated toothbrushes was strongly correlated (rho = 0.8, P < 0.0001). Participants who returned toothbrushes with extreme wear had significantly higher plaque scores than those who returned toothbrushes with no visible or light wear (P = 0.01).

Conclusion: Toothbrush wear per individual patient is fairly consistent. Toothbrushes with extreme wear were less effective than those with no or light wear. Therefore, bristle splaying appears to be a more appropriate measure of brush replacement time then the commonly used toothbrush age. Splaying of the outer tufts beyond the base of the toothbrush is a condition that indicates it is time to change the brush.

These updates will begin rolling out later this year. From a unified platform with Samsung, to a new consumer experience, and a world-class fitness service from Fitbit, this is a new era for the wearables ecosystem.

"Some of the rental set included old clothes, but they all appeared to be clean and well laundered and were worn without problems.

It was also convenient to be able to wear the clothes as room clothes at the hotel on the last day of the trip, even after packing my suitcase, until just before check-out."

The clothes were at my hotel when I arrived and I was so happy to unpack and wear them. The fit was good and the clothes were of a nice quality. I especially loved the brown striped pants! Thank you for this service, it was a lovely experience and I have already recommended it to my friends.

A higher-level number lifejacket offers greater flotation, stability in the water, and ability to turn a wearer face up. These life jackets are more appropriate for offshore activities where rescue times could take longer.

Recreational boating and water activities are enjoyed by millions of Americans each year. Boating safety advocates recommend all boaters and passengers not only have a life jacket, but wear it at all times while boating. Regardless of your age or experience level, the data shows that life jackets save lives. Take the pledge to always Wear It while boating.

It's too hot!! I know how to swim! It's just not cool! Nothing will happen to me! These are some of the reasons boaters give for not wearing a life jacket. Let us give you some reasons why you should.

Do it for yourself and your family! Most boating fatalities are the result of capsizings or falls overboard when the victims were not wearing a life jacket. Expect the unexpected and wear a life jacket. Remember, it won't work if you don't wear it!

It's the law!! Everyone on board a vessel must have a life jacket available to them. Make sure they fit properly and are in good condition. Anyone being towed on skis or a tube, riding a Jet Ski or Sea Doo, or boating within 800 feet below a dam must wear a life jacket.

The annual WEAR Conference examines the significant breakthroughs and new opportunities made possible through the integration of textiles and technology through wearables. This event regularly brings together key players from across the smart fabrics, e-textiles, and wearable tech marketplace to hear the latest updates on market dynamics & industry innovations, wearable and smart fabric standardization, intellectual property and data collection, textile technology, wearable healthcare and wellness, and more.

At the 2023 event attendees:

Founded in 1982, Pickering Laboratories Inc. manufactures product testing solutions used for both the initial product development as well as ongoing quality and materials testing. Our line of artificial body fluids includes our proprietary human mimics, such as eccrine and apocrine perspiration. We have expanded our product line to include saliva, urine, lung fluid and blood. These complex solutions are the perfect choice for evaluating wearables under actual wear conditions. Pickering Laboratories also manufactures body fluids made to official product testing specifications from AATCC, ISO, DIN, BS, EN and other worldwide standards organization. Our analytical chemistry expertise and quality manufacturing ensure outstanding batch reproducibility and precise formulations. Custom formulations are also routinely produced with the same guarantee of precision and reproducibility. Our customer base uses our artificial body fluids in a wide range of applications including: durability studies, colorfastness testing and other assorted medical applications. 17dc91bb1f