An official website of the United States government
Abstract We describe and analyze the semantics of rationale and precautioning clauses (i.e. in order to- and lest-clauses) through a detailed case study of two operators in A’ingae (or Cofán, iso 639-3: con, an Amazonian isolate): the infinitive -ye ‘inf’ and the apprehensional -sa’ne ‘appr.’ We provide a new account of rationale semantics and the first formal account of precautioning semantics. We propose that in structures such as [$$p$$ [(in order) to$$q$$]] or [$$p$$ [$$q$$-ye]], the rationale operator (underlined) encodes modal semantics where the goal worlds of the actor responsible for $$p$$ achieve $$q$$. In structures such as [$$p$$ [lest$$q$$]] or [$$p$$ [$$q$$-sa’ne]], the precautioning operator encodes modal semantics where the actor’s goal worlds avoid a recoverable situation $$r$$ which entails $$q$$ ($$r\Rightarrow q$$). We observe and account for three apparent asymmetries within the domain of rationale and precautioning semantics, which we dub precautioning semantics asymmetry, rationale polarity asymmetry, and precautioning encoding asymmetry. We thus elucidate the relation between rationale and precautioning clauses and make substantial predictions with respect to the cross-linguistic inventories of rationale and precautioning operators.
more »
« less
Voltage Imaging In Vivo Using Periodic Structured Illumination with Pseudo-HiLo Reconstruction
We utilize pseudo-HiLo (pHiLo) for voltage imaging in awake mice expressing Voltron2552 in parvalbumin (PV) interneurons in the somatosensory cortex. We demonstrate increased signal-to-background ratio using pHiLo compared to traditional widefield neural recording.
more »
« less
- Award ID(s):
- 2319405
- PAR ID:
- 10630819
- Publisher / Repository:
- Optica Publishing Group
- Date Published:
- ISBN:
- 978-1-957171-46-3
- Page Range / eLocation ID:
- BM1B.3
- Format(s):
- Medium: X
- Location:
- Coronado, CA
- Sponsoring Org:
- National Science Foundation
More Like this
-
-
Abstract ObjectiveIn a southcentral Alaska stream system, we conducted a study to evaluate the effect of trap type (galvanized and nylon coated), bait type (salmon roe cured with and without sodium sulfite), and soak times (1 h and 24 h) on captures of juvenile salmon using Gee-style minnow traps. This was undertaken due to the limited research on this topic, aiming to determine how variations in methodology affected captures in juvenile salmon. MethodsWe employed a three-way fixed factorial design to sample 176 stream reaches (with a single trap in each each) from June 2021 to September 2021, capturing 296 Coho Salmon Oncorhynchus kisutch and 105 Chinook Salmon O. tshawytscha. ResultWe found an estimated 78% decrease in captures of Coho Salmon when nylon-coated traps were used instead of galvanized traps, and we found that trap type showed no effect on number of captures for Chinook Salmon. Additionally, we did not detect effects of bait type and soak time on the number of captures for either species. Not surprisingly, there was a positive relationship between Julian date and temperature with captures for both species. Additionally, for Coho Salmon, we found a quadratic relationship between water velocity and captures. ConclusionUnderstanding and accounting for these factors will help researchers to maximize trapping efficiency, standardize protocols, and determine the extent to which results are comparable across studies employing different methods.more » « less
-
Abstract We prove that, for every closed (not necessarily convex) hypersurface Σ in ℝ n + 1 {\mathbb{R}^{n+1}} and every p > n {p>n} , the L p {L^{p}} -norm of the trace-free part of the anisotropic second fundamental form controls from above the W 2 , p {W^{2,p}} -closeness of Σ to the Wulff shape. In the isotropic setting, we provide a simpler proof. This result is sharp since in the subcritical regime p ≤ n {p\leq n} , the lack of convexity assumptions may lead in general to bubbling phenomena.Moreover, we obtain a stability theorem for quasi-Einstein (not necessarily convex) hypersurfaces and we improve the quantitative estimates in the convex setting.more » « less
-
Abstract We applied an integrative taxonomic framework to evaluate the systematics of the Neotropical Black-and-white Becard (Pachyramphus albogriseusSclater 1857). Combining phylogenomic (ultraconserved elements), morphological, and vocalization data, we confirmed that this species is polyphyletic; some individuals form a clade sister to P. polychopterus and should be afforded species rank as P. salviniRichmond 1899 (Slender-billed Becard), whereas the remaining subspecies of P. albogriseus (Broad-banded Becard) are sister to P. major. We found that P. salvini differs from P. albogriseus in song, color of the lores, wing-bar width, body size, and bill width. Whereas P. albogriseus occurs in montane forest in Costa Rica and Panama (ssp. ornatus) and along the eastern slope of the Andes from northern Venezuela to southern Peru (ssp. albogriseus), P. salvini is found in the lowlands from Pacific Colombia south to northwest Peru and in the Río Marañón drainage. The latter also occurs, possibly only seasonally, along the eastern slope of the Andes, where the two species’ ranges approach closely. We treat P. a. guayaquilensisZimmer 1936 as a junior synonym of P. salviniRichmond 1899, and P. a. coronatusPhelps and Phelps 1953 as a junior synonym of P. a. albogriseusSclater 1857. This study provides a striking example of a major problem for comparative biology: underestimated and mischaracterized diversity. We argue that there are likely many more cases like this awaiting discovery.more » « less
-
Suppose that we are given sample access to an unknown distribution p over n elements and an explicit distribution q over the same n elements. We would like to reject the null hypothesis“p=q” after seeing as few samples as possible, whenp6=q, while we never want to reject the null, when p=q. Well-known results show thatΘ(√n/2)samples are necessary and sufficient for distinguishing whether p equals q versus p is-far from q in total variation distance. However,this requires the distinguishing radiusto be fixed prior to deciding how many samples to request.Our goal is instead to design sequential hypothesis testers, i.e. online algorithms that request i.i.d.samples from p and stop as soon as they can confidently reject the hypothesis p=q, without being given a lower bound on the distance between p and q, whenp6=q. In particular, we want to minimize the number of samples requested by our tests as a function of the distance between p and q, and if p=q we want the algorithm, with high probability, to never reject the null. Our work is motivated by and addresses the practical challenge of sequential A/B testing in Statistics.We show that, when n= 2, any sequential hypothesis test must seeΩ(1dtv(p,q)2log log1dtv(p,q))samples, with high (constant) probability, before it rejects p=q, where dtv(p,q) is the—unknown to the tester—total variation distance between p and q. We match the dependence of this lower bound ondtv(p,q)by proposing a sequential tester that rejects p=q from at most O(√ndtv(p,q)2log log1dtv(p,q))samples with high (constant) probability. TheΩ(√n)dependence on the support size n is also known to be necessary. We similarly provide two-sample sequential hypothesis testers, when sample access is given to both p and q, and discuss applications to sequential A/B testing.more » « less
- Free Publicly Accessible Full Text
-
Accepted Manuscript1.0
- Conference Paper:
- https://doi.org/10.1364/BRAIN.2025.BM1B.3
