Lifeboat Foundation

The Defense Advanced Research Projects Agency (DARPA) in collaboration with Lockheed Martin are developing the OpFires mobile medium-range hypersonic missile assembly to fit on the back of an U.S. Army’s Palletized Load System (PLS) 5-axle 10×10 truck. OpFires will provide the U.S. Army with a highly mobile vehicle for firing hypersonic missiles that is independent of the tractor and trailer combination for the longer-range (strategic) hypersonic missiles. The U.S. Marines may also be interested in OpFires as they use the similar Logistic Vehicle Replacement System (LVSR) 10×10 truck.

The OpFires Project will use throttleable rocket motors on hypersonic missiles to achieve varying ranges in flight; therefore, OpFires can hit targets within the range envelope up to 1,000 miles (1,609 kilometers). At Mach 5+, the OpFires’ warhead can fly 1,000 miles in approximately 20 minutes.

After dozens of tornadoes sweep through nine states, here is a look at the worst tornado outbreaks on record.

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EK®, the leading computer cooling solutions provider, is proud to unveil its Special Edition high-performance GPU water blocks for the NVIDIA® GeForce® RTX™ 3,070 Ti Founders Edition graphics card. The EK-Quantum Vector FE RTX 3,070 Ti D-RGB comes in two versions – Silver and Black, both featuring the aluminum outer shell and backplate in the same color, as well as the Plexi window and terminal illuminated with addressable D-RGB LEDs.

This water block comes with multiple ports, allowing great versatility. The performance is one of the key elements of the design, which is why this block features a 30% larger fin area compared to other water blocks from the Vector family.

The BC-160 mining card from XFX is now available in China.

Back in October, we reported that XFX is preparing its custom card for cryptocurrency mining. This card was supposedly using Navi 12 GPU, which to this date was more commonly known as ‘special’ GPU for Apple Mac or Radeon Pro V560. This GPU was never released for gamers though. More than 2 years since it was first introduced, AMD is now supplying Navi 12 chips for mining equipment.

For centuries, great thinkers have struggled to understand how people represent a personal identity that changes over time. Insight may come from a basic principle of perception: as objects become distant, they also become less discriminable or “compressed.” In Studies 1–3, we demonstrate that people’s ratings of their own personality become increasingly less differentiated as they consider more distant past and future selves. In Study 4, we found neural evidence that the brain compresses self-representations with time as well. When we peer out a window, objects close to us are in clear view, whereas distant objects are hard to tell apart. We provide evidence that self-perception may operate similarly, with the nuance of distant selves increasingly harder to perceive.

A basic principle of perception is that as objects increase in distance from an observer, they also become logarithmically compressed in perception (i.e., not differentiated from one another), making them hard to distinguish. Could this basic principle apply to perhaps our most meaningful mental representation: our own sense of self? Here, we report four studies that suggest selves are increasingly non-discriminable with temporal distance from the present as well. In Studies 1 through 3, participants made trait ratings across various time points in the past and future. We found that participants compressed their past and future selves, relative to their present self. This effect was preferential to the self and could not be explained by the alternative possibility that individuals simply perceive arbitrary self-change with time irrespective of temporal distance.

A robot learns to follow a path to exit a maze through sensorimotor learning that is induced by an organic neuromorphic circuit.

In this work we propose a novel campaign for constraining relativistically compact MACHO dark matter, such as primordial black holes (PBHs), using the moon as a detector. PBHs of about $10^{19} \textrm{ g}$ to $10^{22} \textrm{ g}$ may be sufficiently abundant to have collided with the moon in the history of the solar system. We show that the crater profiles of a PBH collision differ from traditional impactors and may be detectable in high resolution lunar surface scans now available. Any candidates may serve as sites for in situ measurements to identify high pressure phases of matter which may have formed near the PBH during the encounter. While we primarily consider PBH dark matter, the discussion generalises to the entire family of MACHO candidates with relativistic compactness.

Abstract: We present new HI interferometric observations of the gas-rich ultra-diffuse galaxy AGC 114,905, which previous work, based on low-resolution data, identified as an outlier of the baryonic Tully-Fisher relation. The new observations, at a spatial resolution $\sim 2.5$ times higher than before, reveal a regular HI disc rotating at about 23 km/s. Our kinematic parameters, recovered with a robust 3D kinematic modelling fitting technique, show that the flat part of the rotation curve is reached. Intriguingly, the rotation curve can be explained almost entirely by the baryonic mass distribution alone. We show that a standard cold dark matter halo that follows the concentration-halo mass relation fails to reproduce the amplitude of the rotation curve by a large margin. Only a halo with an extremely (and arguably unfeasible) low concentration reaches agreement with the data. We also find that the rotation curve of AGC 114,905 deviates strongly from the predictions of Modified Newtonian dynamics. The inclination of the galaxy, which is measured independently from our modelling, remains the largest uncertainty in our analysis, but the associated errors are not large enough to reconcile the galaxy with the expectations of cold dark matter or Modified Newtonian dynamics.

From: Pavel Mancera-Piña [view email]

[v1] Tue, 30 Nov 2021 19:00:01 UTC (7,952 KB)

Fumarate is a terminal electron acceptor in the mammalian electron transport chain, and its reduction sustains mitochondrial functions in hypoxia.