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Now while I had complete access to both the polycarbonate and composite helmet manufacturing facilities, I can only report on polycarbonate helmet manufacturing.

For the watch, it was a year before Ive settled on straps that clicked into slots. Ive later tested watchbands by wearing them outside the studio with other watches. The shape of the body, meanwhile, barely changed: a rectangle with rounded corners. “When a huge part of the function is lists”—of names, or appointments—“a circle doesn’t make any sense,” Ive said. Its final form resembles one of Newson’s watches, and the Cartier Santos, from 1904.

Each of the fabricated surfaces has been characterized during pool boiling of saturated water at atmospheric conditions using a custom built experimental apparatus. The complete details of the apparatus, testing procedures, and experimental uncertainty can be found in the Methods Section as well as prior publications14,19. Briefly, each surface was soldered to an insulated copper heater block and submerged in a bath of saturated water. The heat flux delivered to the surface, q”, is periodically increased in small increments and the system is left to reach thermal equilibrium, typically 10–20 minutes. After this the surface temperature and heat flux are recorded, and the process is repeated up until the CHF is reached. CHF is taken as the highest stable heat flux prior to the uncontrollable increase in surface temperature associated with dry-out. The average wall temperature at the surface of the sample, , is measured using a thermocouple placed at the top of the heater block, and accounts for the various thermal resistances between this thermocouple and the surface. These include the resistances across the solder interface and bulk copper14,19, as well as the resistance across the composite copper-epoxy region near the surface of the sample. While the embedded epoxy produces in-plane temperature variations on the surface, it does not greatly impact the overall thermal resistance of the sample itself. For the extremely thin samples tested in this work (1 mm thickness), the increase in overall thermal resistance of the substrate was ~6% for the N = 4 cm−1 design. For a more realistic wall thickness of 1/4 inch (6.35 mm), the increase in thermal resistance associated with adding embedded epoxy divisions drops to less than 1%.

One of the differences between “cheap” helmets and a quality helmet is that a quality EPS liner is specifically engineered and designed for each different head size.

Sharp edges aside, the rest of the case is fantastic. The buttons are tactile and easy to push, which unfortunately can’t be said of every case. Cutouts for the camera and fingerprint sensor are well-done, and the gloss black accents surrounding them are a nice touch. The Caseology logo is small and subtle, and the little feet on all four corners of the back prevent the back from getting scuffed up when you put it down. The inside has an interesting pattern to prevent dust from getting squished and possibly scratching your phone up, which an increasing number of cases have these days. The lip is large enough to clear a glass screen protector.

The Air Jacket is a bad case, plain and simple. It’s not protective at all, it’s slippery, and the buttons are awful. On top of that, it’s a whopping $34.95 on the Google Store. I’d hesitate to pay $5 for this case, and that’s not an exaggeration. Please don’t buy this thing.

The phone also features infrared face unlock functionality. That’s not as accurate as the 3D facial recognition tech you’d find on the iPhone X or the Huawei Mate 20 Pro, but it definitely is quite convenient to have the phone recognise my face even in pitch darkness. Just like the fingerprint sensor, unlocking the phone using your face is also pretty fast, though it wasn’t entirely reliable, and was sometimes unable to recognise me.

Figure 2 shows representative images extracted from high-speed imaging, showing nucleate boiling on bi-conductive surfaces with various values of N. Complete movies can be found in the supplemental material. All of the surfaces tested exhibited similar incipience temperatures, with the onset of nucleate boiling occurring around ΔT ~ 5–7 K. It can be seen that bubbles form exclusively on the copper regions, with the low-temperature epoxy divisions suppressing the nucleation process as expected. More importantly, the epoxy divisions remain wetted at all times and resist the lateral motion of bubbles across them. This allows for the formation of ordered pathways for liquid return above the cold epoxy divisions. Figure 3 shows the measured boiling curves, and heat transfer coefficient as a function of superheat for each surface tested. The bare copper surface reached a CHF of ~116 W/cm2 with a maximum HTC of ~70 kW/m2K. This closely matches the results from various other researchers, demonstrating the accuracy of the experimental apparatus1,11,20. Substantial increases in boiling performance can be seen for nearly all of the bi-conductive surfaces as compared to bare copper. At moderate superheats (ΔT = 10–11 K), an increase in heat flux and heat transfer coefficient of greater than 5x has been demonstrated using bi-conductive surfaces with a pitch of P = 2.33 mm (N = 4 cm−1). While the incipience temperature does not vary substantially for any of the surfaces tested, heat transfer is increased due to enhanced bubble dynamics on the bi-conductive surfaces. This demonstrates that the addition of epoxy does not enhance HTC by promoting nucleation at lower superheats, as shown for structured surfaces and surfaces with mixed wettability1,9,11,20,22,23,25.

the fukushima residence is designed as a series of stepped concrete volumes, resulting in overhead gaps to offer open-air interior courtyards.

"There are parquet floors, marble columns and pilasters, dramatic chandeliers on motorized lifts for cleaning, hand-carved wall panels, intricate crown molding, rotundas, balconies galore, 14-foot ceilings, skylights, an elevator, and on and on. Every room brings a new level of luxury, bursting with scrollwork and archways and medallions and gilded accents."

-      Continuing on a history of innovation for Range Rover, the Velar incorporates advanced technologies, compelling design and an absolute attention to detail that portend Range Rover design language for future models

Betz, A. R., Xu, J., Qiu, H. & Attinger, D. Do surfaces with mixed hydrophilic and hydrophobic areas enhance pool boiling? Applied Physics Letters 97, 141909–3 (2010).