skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: Online surveillance of novel psychoactive substances (NPS): Monitoring Reddit discussions as a predictor of increased NPS-related exposures
Award ID(s):
2021585
PAR ID:
10654527
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ;
Publisher / Repository:
NSF PAR
Date Published:
Journal Name:
International Journal of Drug Policy
Volume:
98
Issue:
C
ISSN:
0955-3959
Page Range / eLocation ID:
103393
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Abstract Proleptic (or prothetic) objects (Majaliwa remembered about Samson that he’s sick) present a particular puzzle because they appear to instantiate an unconstrained cross-clausal dependency between the proleptic object (Samson) and a correlate (he). The current analytical approach to prolepsis is relies on a syntactic mechanism of treating the embedded clause as a predicate, derived by merging a null operator which unselectively binds the correlate. This approach faces a number of known empirical challenges. Moreover, this work does not meaningfully engage with any of the recent semantic innovations in our understanding of embedded clauses (Kratzer 2006. Decomposing attitude verbs. Available at:http://semanticsarchive.net/Archive/DcwY2JkM/attitude-verbs2006.pdf). I offer an alternative to the CP-predicate approach, adopting three (semi-)independently motivated ideas concerning (i) the syntax of cross-clausal dependencies in Lohninger et al. (2022. From prolepsis to hyperraising.Philosophies7(32)), (ii) the semantics of embedded clauses in Kratzer (2006. Decomposing attitude verbs. Available at:http://semanticsarchive.net/Archive/DcwY2JkM/attitude-verbs2006.pdf)/Moulton (2009. Not moving clauses: Connectivity in clausal arguments.Syntax16(3). 250–291), and (iii) the semantics ofaboutin Rawlins (2013. About about.Proceedings of SALT23. 336–357)/Onea and Mardale (2020. From topic to object, grammaticalization differential object marking in Romanian.Canadian Journal of Linguistics/Revue Canadienne de Linguistique65(3). 350–392). I argue that proleptic objects are complex-NPs, roughly,the thing about Samson. The somewhat particular properties of prolepsis are natural consequences of these combined ideas. I further present empirical evidence from Japanese that the complex-NP analysis is on the right track. This analysis deepens our understanding of prolepsis by including both semantic and syntactic factors. 
    more » « less
  2. null (Ed.)
    The surfaces of chemically synthesized spherical gold NPs (Au-NPs) have been modified using chiral L- or D-penicillamine (Pen) in order to impart enantioselective adsorption properties. These chiral Au-NPs have been used to demonstrate enantioselective adsorption of racemic propylene oxide (PO) from aqueous solution. In the past we have studied enantioselective adsorption of racemic PO on L- or D-cysteine (Cys)-coated Au-NPs. This prior work suggested that adsorption of PO on Cys-coated Au-NPs equilibrates within an hour. In this work, we have studied the effect of time on the enantioselective adsorption of racemic PO from solution onto chiral Pen/Au-NPs. Enantioselective adsorption of PO on chiral Pen/Au-NPs is time-dependent but reaches a steady state after ~18 h at room temperature. More importantly, L- or D-Pen/Au-NPs are shown to adsorb R- or S-PO enantiospecifically and to separate the two PO enantiomers from racemic mixtures of RS-PO. 
    more » « less
  3. Li4Ti5O12 (LTO) has received considerable interest as an alternate anode material for high power density batteries for large scale applications. However, LTO suffers from poor Li+ diffusivity and poor electronic conductivity, resulting in capacity loss and poor rate performance. Here we demonstrate a facile synthesis of LTO NPs using liquid-feed flame spray pyrolysis (LF-FSP) which provides high surface area (∼38 m2/g) spinel structure LTO NPs with average particle sizes (APSs) of 45 ± 0.3 nm. Pristine LTO-Li half-cells exhibit reversible capacity of 70 mAh/g at 10 C. In this study, we show that mixing LiAlO2 NPs (5 wt %) and Li6SiON polymer precursor (10 wt %) with pristine LTO via ball-milling and ultrasonication followed by tape casting enhances the LTO rate performance providing reversible capacity of ∼217 mAh/g at 5 C over 500 cycles. The Li6SiON polymer electrolyte is synthesized from rice hull ash (RHA), an agricultural waste, providing a green synthetic approach to electrode coating materials. CV and EIS studies indicate that adding the solid and polymer electrolytes reduces charge-transfer resistance and electrode polarization, enhancing both reversibility and the LTO Li+ diffusion coefficient from 4.6 × 10−14 to 2.7 × 10−12 cm2/s. 
    more » « less