NorthWest Arkansas Community College (NWACC) is a public community college with its main campus in Bentonville, Arkansas. Total enrollment for the fall semester of 2018 was 8,308.
Green Pea galaxies (GPs) are a class of rare, extreme star-forming galaxies whose physical properties closely resemble high-redshift Ly-α emitting galaxies. Their high equivalent width [O III] emission lines make them readily identifiable in surveys of emission-line galaxies like the on-going deep, narrowband Star Formation Across Cosmic Times (SFACT) survey. In this study, we use broadband gri colors and [O III] equivalent widths derived from narrowband images to select a new sample of 120 GP candidates from a catalog of [O III]-detected galaxies identified in the SFACT survey. All SFACT GP candidates have spectroscopically confirmed redshift in the range z = 0.31-0.51. The median apparent magnitude of our sample is g = 22.9. We compare the properties of our GP candidate sample to other samples of known GPs. We find that the excellent depth of SFACT allows us to detect GP candidates to lower luminosities than these comparison samples. This is the first catalog of SFACT GP candidates; additional candidates will be added as the spectroscopic follow-up of the SFACT survey is completed.
Natal dispersal is a fundamental phase of the life history of species despite associated risks with that dispersal. These risks are increased for subterranean mammals, which are uniquely adapted for movement in a subterranean environment and invest much energy into building burrows and creating food caches. The Ozark pocket gopher Geomys bursarius ozarkensis Elrod, Zimmerman, Sudman and Heidt, 2000, endemic to north central Arkansas, is an imperiled and geographically isolated subspecies of the plains pocket gopher Geomys bursarius Shaw, 1800. Understanding its natal dispersal patterns is necessary for long-term conservation plans. We conducted radio telemetry of 33 juvenile Ozark pocket gophers to characterize dispersal frequency, distance, seasonality, and sex bias. Natal dispersal was rare (9.1%) in Ozark pocket gophers and occurred over shorter distances (20-70 m) than documented in other gopher species. The low number of dispersers identified (n = 3) precluded us from determining seasonal or sex bias. We had limited evidence of above-ground dispersal despite the adaptations of pocket gophers to the subterranean environment.
Sophisticated instrumentation for AI systems might have indicators that signal misalignment from human values, not unlike a "check engine" light in cars. One such indicator of misalignment is deceptiveness in generated responses. Future AI instrumentation may have the ability to detect when an LLM generates deceptive responses while reasoning about seemingly plausible but incorrect answers to factual questions. In this work, we demonstrate that linear probes on LLMs internal activations can detect deception in their responses with extremely high accuracy. Our probes reach a maximum of greater than 90
AbstractNatural selection is widely considered responsible for the fit between organisms and their environment. Lizard limb length variation is a paradigmatic example: studies have shown that limb length differences tightly correlate with habitat use among species, while small differences in limb length between individuals can affect biomechanical function, fitness, and survival within populations. It has therefore been surprising for many field biologists to find otherwise-healthy wild lizards with damaged or missing limbs, appearing to challenge associated expectations of substantial fitness costs. We document limb loss (from a foot to an entire limb) in 58 lizard species, with all cases showing healed limbs and many lizards appearing robust and healthy. Data indicate that limb-deficient lizards typically comprise less than 1% of populations and often exhibit body condition, sprint speed performance, and survival comparable to limb-intact individuals. We discuss the implications of these findings for how evolutionary adaptation is studied and understood in natural populations and provide a perspective on conventional assumptions about the strength and ubiquity of selection pressures on seemingly critical traits. Is natural selection always as omnipresent as Darwin envisioned it to be?
