•Popular measures of videogame player experience typically have not been empirically validated.•We provide factor-analytic validation of two of the most commonly used player experience scales.•The ...theorised structure of the GEQ is partially supported; a revised five factor structure is proposed.•The theorised structure of the PENS is largely supported, but we suggest combining two subscales.
Accurate measurement of the player experience in videogames is key to understanding the impacts of videogame play, designing and developing engaging videogames, and effectively applying game design principles in other fields. A large number of player experience questionnaires are available, but in most cases empirical validation of the scales is limited or absent. Two of the most commonly used scales are the Player Experience of Need Satisfaction (PENS) and the Game Experience Questionnaire (GEQ). Both scales were developed using a rational-theoretical approach, but neither scale has had formal factor-analytic studies published, limiting our capacity to judge the empirical validity of the scales. We present detailed exploratory and confirmatory factor analyses of both scales based on responses from a sample (n = 571) of videogame players. The GEQ is partially supported (using a revised factor structure); the PENS is largely supported (with a more minor revision of the factor structure). We provide suggestions for the most effective use of both scales in future research.
Sphingomyelin (SM) and cholesterol are coregulated metabolically and associate physically in membrane microdomains involved in cargo sorting and signaling. One mechanism for regulation of this ...metabolic interface involves oxysterol binding protein (OSBP) via high-affinity binding to oxysterol regulators of cholesterol homeostasis and activation of SM synthesis at the Golgi apparatus. Here, we show that OSBP regulation of SM synthesis involves the endoplasmic reticulum (ER)-to-Golgi ceramide transport protein (CERT). RNA interference (RNAi) experiments in Chinese hamster ovary (CHO)-K1 cells revealed that OSBP and vesicle-associated membrane protein-associated protein (VAP) were required for stimulation of CERT-dependent ceramide transport and SM synthesis by 25-hydroxycholesterol and cholesterol depletion in response to cyclodextrin. Additional RNAi experiments in human embryonic kidney 293 cells supported OSBP involvement in oxysterol-activated SM synthesis and also revealed a role for OSBP in basal SM synthesis. Activation of ER-to-Golgi ceramide transport in CHO-K1 cells required interaction of OSBP with the ER and Golgi apparatus, OSBP-dependent Golgi translocation of CERT, and enhanced CERT-VAP interaction. Regulation of CERT by OSBP, sterols, and VAP reveals a novel mechanism for integrating sterol regulatory signals with ceramide transport and SM synthesis in the Golgi apparatus.
The new Lewis acid-base adducts of general formula X(nad)B←NC
H
-C
H
N→B(nad)X nad = 1,8-O
C
H
X = C
H
(
), 3,4,5-F
-C
H
(
) were synthesized in high yields via reactions of 1,8-dihydroxy naphthalene ...nadH
and 4,4'-bipyridine with the aryl boronic acids C
H
B(OH)
and 3,4,5-F
-C
H
B(OH)
, respectively, and structurally characterized by multi-nuclear NMR spectroscopy and SCXRD. Self-assembled H-shaped Lewis acid-base adduct
proved to be effective in forming thermally stable host-guest complexes,
× solvent, with aromatic hydrocarbon solvents such as benzene, toluene, mesitylene, aniline, and
-,
-, and
-xylene. Crystallographic analysis of these solvent adducts revealed host-guest interactions to primarily occur via π···π contacts between the 4,4'-bipyridyl linker and the aromatic solvents, resulting in the formation of 1:1 and 1:2 host-guest complexes. Thermogravimetric analysis of the isolated complexes
× solvent revealed their high thermal stability with peak temperatures associated with the loss of solvent ranging from 122 to 147 °C.
, when self-assembled in an equimolar mixture of
-,
-, and
-xylene (1:1:1), preferentially binds to
-xylene. Collectively, these results demonstrate the ability of 1,8-dihydroxy naphthalene to serve as an effective building block in the selective self-assembly to supramolecular aggregates through dative covalent N→B bonds.
► Extended previous longitudinal research examining personality and ideology. ► Examined the bidirectional associations between these dimensions over 9
months. ► Included Big-Five personality, Social ...Dominance Orientation and Right-Wing Authoritarianism. ► Low Agreeableness predicted SDO and Openness to Experience predicted RWA over time. ► RWA and SDO did not predict reciprocal prospective change in personality.
A full cross-lagged panel design examined the bidirectional effects of the Big-Five personality dimensions on Social Dominance Orientation (SDO) and Right-Wing Authoritarianism (RWA) over 9
months (
N
=
190 undergraduates). Consistent with the Dual Process Cognitive-Motivational Model, SDO and RWA exhibited markedly different personality bases. Low Agreeableness predicted change in the motivational goal for group-based dominance and superiority (SDO), whereas Openness to Experience predicted change in the motivational goal for social cohesion and collective security (RWA). Extending previous longitudinal research, this study indicates that the effect of personality on ideology is unidirectional, as RWA and SDO did not predict reciprocal prospective change in broad-bandwidth personality. These findings are consistent with a model in which relatively stable broad-bandwidth personality traits shape ideological attitudes over even relatively short time periods, and not the reverse.
The genus Zagrammosoma Ashmead (Hymenoptera: Eulophidae) is revised. Twenty-six species are recognized, of which 23 have been molecularly verified in a phylogenetic context using 28S, ITS2, and COI. ...Zagrammosoma is recovered as monophyletic, worldwide in distribution, and morphologically distinct from Cirrospilus Westwood. Zagrammosoma interlineatum Girault stat. rev. is elevated from synonymy. The following synonymies are proposed: Zagrammosoma mirum Girault under Zagrammosoma flavolineatum Crawford n. syn., Zagrammosoma dulanense Cao Zhu under Zagrammosoma talitzkii Bouček n. syn. The following species are described as new: Zagrammosoma calvini Perry n. sp. (Argentina, Chile), Zagrammosoma deliae Perry n. sp. (Peru), Zagrammosoma fisheri Perry n. sp. (USA), Zagrammosoma galapagoense Perry n. sp. (Ecuador: Galapagos Islands), Zagrammosoma headricki Perry n. sp. (Mexico, USA), Zagrammosoma metallicum Perry n. sp. (USA), Zagrammosoma occidentale Perry n. sp. (Mexico, USA), Zagrammosoma triangulum Perry n. sp. (USA), Zagrammosoma trifurcatum Perry n. sp. (Belize, USA), Zagrammosoma villosum Perry n. sp. (Nearctic, Neotropical), Zagrammosoma yanegai Perry n. sp. (Thailand). The following new combination is proposed: Cirrospilus variegatus (Masi) n. comb, from Zagrammosoma. Descriptions, distribution maps, host associations, and a key to all known species are provided.
The Holarctic species Cirrospilus vittatusWalker, 1838 (Hymenoptera: Eulophidae) is an important parasitoid of lepidopteran, dipteran, coleopteran, and hymenopteran leaf miners. One of the defining ...characteristics of the species has been its presumed extensive color variation, with individuals ranging from almost completely dark metallic green or blue to completely yellow with no metallic markings. An integrative approach utilizing morphological and molecular data (28S-D2, COI, ITS2) reveals that C. vittatus sensu lato in North America is a species complex comprised of at least four distinct, sometimes sympatric, species that can attack the same host.This species complex emerges as a monophyletic group, separate from Cirrospilus s.s., which we designate Burkseusgen. n.The species Burkseus vittatuscomb. n. is redefined and has a Holarctic distribution, and B. flavoviridis (Crawford) comb. n. is reinstated from synonymy with B. vittatus. The following combinations are also proposed: B. elongatus (Bouček) comb. n.,B. pinicolus (Askew) comb. n., and B. singa (Walker) comb. n.The following species are described as new: Burkseus sigillatusn. sp. and B. robustusn. sp. Some of the species are sympatric at several locations, but they remain molecularly and morphologically distinct.The delimitation of these species impacts our ability to assess their potential as biological control candidates against Citrus Leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae), and future invasive leaf miner threats.
Abstract
We have observed the
z
= 4.3 protocluster SPT2349−56 with the Australia Telescope Compact Array (ATCA) with the aim of detecting radio-loud active galactic nuclei (AGNs) among the ∼30 ...submillimeter (submm) galaxies (SMGs) identified in the structure. We detect the central complex of submm sources at 2.2 GHz with a luminosity of
L
2.2
= (4.42 ± 0.56) × 10
25
W Hz
−1
. MeerKAT and the Australian Square Kilometre Array Pathfinder also detect the source at 816 MHz and 888 MHz, respectively, constraining the radio spectral index to
α
= −1.45 ± 0.16, implying
L
1.4,rest
= (2.2 ± 0.2) × 10
26
W Hz
−1
. The radio observations do not have sufficient spatial resolution to uniquely identify one of the three Atacama Large Millimeter/submillimeter Array (ALMA) galaxies as the AGN, however the ALMA source properties themselves suggest a likely host. This radio luminosity is ∼100× higher than expected from star formation, assuming the usual far-infrared–radio correlation, indicating an AGN driven by a forming brightest cluster galaxy. None of the SMGs in SPT2349−56 show signs of AGNs in any other diagnostics available to us, highlighting the radio continuum as a powerful probe of obscured AGNs. We compare these results to field samples of radio sources and SMGs, along with the 22 gravitationally lensed SPT-SMGs also observed in the ATCA program, as well as powerful radio galaxies at high redshifts. The (3.3 ± 0.7) × 10
38
W of power from the radio-loud AGN sustained over 100 Myr is comparable to the binding energy of the gas mass of the central halo, and similar to the instantaneous energy injection from supernova feedback from the SMGs in the core region. The SPT2349−56 radio-loud AGNs may be providing strong feedback on a nascent intracluster medium.
IntroductionRacism is a critical determinant of health and health inequities for children and youth. This protocol aims to update the first systematic review conducted by Priest et al (2013), ...including a meta-analysis of findings. Based on previous empirical data, it is anticipated that child and youth health will be negatively impacted by racism. Findings from this review will provide updated evidence of effect sizes across outcomes and identify moderators and mediators of relationships between racism and health.Methods and analysisThis systematic review and meta-analysis will include studies that examine associations between experiences of racism and racial discrimination with health outcomes of children and youth aged 0–24 years. Exposure measures include self-reported or proxy reported systemic, interpersonal and intrapersonal racism. Outcome measures include general health and well-being, physical health, mental health, biological markers, healthcare utilisation and health behaviours. A comprehensive search of studies from the earliest time available to October 2020 will be conducted. A random effects meta-analysis will examine the average effect of racism on a range of health outcomes. Study-level moderation will test the difference in effect sizes with regard to various sample and exposure characteristics. This review has been registered with the International Prospective Register of Systematic Reviews.Ethics and disseminationThis review will provide evidence for future research within the field and help to support policy and practice development. Results will be widely disseminated to both academic and non-academic audiences through peer-review publications, community summaries and presentations to research, policy, practice and community audiences.PROSPERO registration numberCRD42020184055.
Abstract
We have used the Submillimeter Array (SMA) at 860 $\mu$m to observe the brightest sources in the Submillimeter Common User Bolometer Array-2 (SCUBA-2) Cosmology Legacy Survey (S2CLS). The ...goal of this survey is to exploit the large field of the S2CLS along with the resolution and sensitivity of the SMA to construct a large sample of these rare sources and to study their statistical properties. We have targeted 70 of the brightest single-dish SCUBA-2 850 $\mu$m sources down to S850 ≈ 8 mJy, achieving an average synthesized beam of 2.4 arcsec and an average rms of σ860 = 1.5 mJy beam−1 in our primary beam-corrected maps. We searched our SMA maps for 4σ peaks, corresponding to S860 ≳ 6 mJy sources, and detected 62, galaxies, including three pairs. We include in our study 35 archival observations, bringing our sample size to 105 bright single-dish submillimetre sources with interferometric follow-up. We compute the cumulative and differential number counts, finding them to overlap with previous single-dish survey number counts within the uncertainties, although our cumulative number count is systematically lower than the parent S2CLS cumulative number count by 14 ± 6 per cent between 11 and 15 mJy. We estimate the probability that a ≳10 mJy single-dish submillimetre source resolves into two or more galaxies with similar flux densities to be less than 15 per cent. Assuming the remaining 85 per cent of the targets are ultraluminous starburst galaxies between z = 2 and 3, we find a likely volume density of ≳400 M⊙ yr−1 sources to be ${\sim }\,3^{+0.7}_{-0.6}\,{\times }\,10^{-7}$ Mpc−3. We show that the descendants of these galaxies could be ≳4 × 1011 M⊙ local quiescent galaxies, and that about 10 per cent of their total stellar mass would have formed during these short bursts of star formation.
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