Book Review: Brennan, Geoffrey; Eriksson, Lina; Goodin, Robert E.; and Southwood, Nicho- las. Explaining Norms.

Explaining Norms is a work in philosophy of social science aspiring to provide an account of norms, their general character, their kinds ðformal, legal, moral, and socialÞ, what they can explain, and what explains their dynamic ðemergence, persistence, and unravelingÞ. The authors engage with various positions in ethics, political philosophy, and ðto some extentÞ the philosophy of law. The discussion is rewarding and inventive—it provides distinctive and intriguing views on several topics ðe.g., on the distinction between moral and social normsÞ. There are a lot of ideas here. Perhaps this is predictable, given that the work is a product of four capable minds. What is surprising is the range of ideas and arguments on which the authors manage to agree and out of which they construct one reasonably cohesive account. Given the wide range of literatures discussed, readers are likely to find much of interest. Not surprisingly, some related literatures do seem to be underplayed—treated in a few footnotes and somewhat by the way, with little development of systematic connections. There are thriving literatures in comparative psychology/ ethology, moral psychology, and cultural anthropology that are devoted to how we humans manage to cooperate and coordinate as we do. While there are footnotes to some of this literature ðsee the index for, e.g., Boyd, Bowles, Camerer, Gintis, and HenrichÞ, many readers would have benefited from a discussion that more fully related the position developed in Explaining Norms to that work in experimental economics and anthropology. Discussing the relationships with work in moral psychology and ethology would also have been appreciated ðHaidt, de Waal, and Tomasello are not mentionedÞ. Still, there is very much to like about what is treated here. The authors seek conceptually individually necessary and jointly sufficient conditions for being a norm. On the account provided, norms are something on the order of normative principles accepted in some group ð3–4Þ. Thus, norms involve some normative principle, possessing “a certain generality of scope and application.” These principles need not be objectively correct or fitting, and they may be objectively “simply awful” ð3Þ. The central questions have to do with what is involved in some group accepting these normative principles. The authors locate their position in two dimensions

Climate Change and Land Management Impact Rangeland Condition and Sage-Grouse Habitat in Southeastern Oregon

Contemporary pressures on sagebrush steppe from climate change, exotic species, wildfire, and land use change threaten rangeland species such as the greater sage-grouse (Centrocercus urophasianus). To effectively manage sagebrush steppe landscapes for long-term goals, managers need information about the potential impacts of climate change, disturbances, and management activities. We integrated information from a dynamic global vegetation model, a sage-grouse habitat climate envelope model, and a state-and-transition simulation model to project broad-scale vegetation dynamics and potential sage-grouse habitat across 23.5 million acres in southeastern Oregon. We evaluated four climate scenarios, including continuing current climate and three scenarios of global climate change, and three management scenarios, including no management, current management and a sage-grouse habitat restoration scenario. All climate change scenarios projected expansion of moist shrub steppe and contraction of dry shrub steppe, but climate scenarios varied widely in the projected extent of xeric shrub steppe, where hot, dry summer conditions are unfavorable for sage-grouse. Wildfire increased by 26% over the century under current climate due to exotic grass encroachment, and by two- to four-fold across all climate change scenarios as extreme fire years became more frequent. Exotic grasses rapidly expanded in all scenarios as large areas of the landscape initially in semi-degraded condition converted to exotic-dominated systems. Due to the combination of exotic grass invasion, juniper encroachment, and climatic unsuitability for sage-grouse, projected sage-grouse habitat declined in the first several decades, but increased in area under the three climate change scenarios later in the century, as moist shrub steppe increased and rangeland condition improved. Management activities in the model were generally unsuccessful in controlling exotic grass invasion but were effective in slowing woodland expansion. Current levels of restoration treatments were insufficient to prevent some juniper expansion, but increased treatment rates under the restoration scenario maintained juniper near initial levels in priority treatment areas. Our simulations indicate that climate change may have both positive and negative implications for maintaining sage-grouse habitat

Measuring atomic NOON-states and using them to make precision measurements

A scheme for creating NOON-states of the quasi-momentum of ultra-cold atoms has recently been proposed [New J. Phys. 8, 180 (2006)]. This was achieved by trapping the atoms in an optical lattice in a ring configuration and rotating the potential at a rate equal to half a quantum of angular momentum . In this paper we present a scheme for confirming that a NOON-state has indeed been created. This is achieved by spectroscopically mapping out the anti-crossing between the ground and first excited levels by modulating the rate at which the potential is rotated. Finally we show how the NOON-state can be used to make precision measurements of rotation.Comment: 14 preprint pages, 7 figure

Quantifying the response of Blainville’s beaked whales to U.S. naval sonar exercises in Hawaii

Funding: US Navy Living Marine Resources Program (Grant Number(s): N39430-17-P-1983).Behavioral responses of beaked whales (family Ziphiidae) to naval use of mid-frequency active sonar (MFAS) have been quantified for some species and regions. We describe the effects of MFAS on the probability of detecting diving groups of Blainville's beaked whales on the U.S. Navy Pacific Missile Range Facility (PMRF) in Hawaii and compare our results to previously published results for the same species at the Atlantic Undersea Test and Evaluation Center (AUTEC) in the Bahamas. We use passive acoustic data collected at bottom-mounted hydrophones before and during six naval training exercises at PMRF along with modelled sonar received levels to describe the effect of training and MFAS on foraging groups of Blainville's beaked whales. We use a multistage generalized additive modeling approach to control for the underlying spatial distribution of vocalizations under baseline conditions. At an MFAS received level of 150 dB re 1 μPa rms the probability of detecting groups of Blainville's beaked whales decreases by 77%, 95% CI [67%, 84%] compared to periods when general training activity was ongoing and by 87%, 95% CI [81%, 91%] compared to baseline conditions. Our results indicate a more pronounced response to naval training and MFAS than has been previously reported.Publisher PDFPeer reviewe

Active-matrix GaN micro light-emitting diode display with unprecedented brightness

Displays based on microsized gallium nitride light-emitting diodes possess extraordinary brightness. It is demonstrated here both theoretically and experimentally that the layout of the n-contact in these devices is important for the best device performance. We highlight, in particular, the significance of a nonthermal increase of differential resistance upon multipixel operation. These findings underpin the realization of a blue microdisplay with a luminance of 10⁶ cd/m²