4,110 research outputs found
Constraints on anomalous quartic gauge couplings via production at the LHC
The vector boson scattering at the Large Hadron Collider (LHC) is sensitive
to anomalous quartic gauge couplings (aQGCs). In this paper, we investigate the
aQGC contribution to production at the LHC with
TeV in the context of an effective field theory (EFT). The unitarity bound is
applied as a cut on the energy scale of this production process, which is found
to have significant suppressive effects on the signals. To enhance the
statistical significance, we analyse the kinematic and polarization features of
the aQGC signals in detail. We find that the polarization effects induced by
the aQGCs are unique and can discriminate the signals from the SM backgrounds
well. With the proposed event selection strategy, we obtain the constraints on
the coefficients of dimension-8 operators with current luminosity. The results
indicate that the process is powerful for searching for
the and operators.Comment: 29 pages, 11 figures, 7 tables, to be published in Chinese Physics
Chinese Consumer Insecurity in the Digital Age: Theoretical Construction of Scale Development
Consumer Insecurity is a new research topic in consumer psychology domain in recent years. It focuses on consumer insecurity perception and consuming behavior outcomes, which are influenced by individual’s internal and external factors. However, the concept of insecurity has just been introduced into consumer behavior research which is urgent to compare with the individual insecurity in traditional psychology area. These studies focus on the concept, structure of consumer insecurity in the digital age of China as its background and develop a multi dimension scale with reliability and validity testing to measure the new variable
Alpha Lipoic Acid Modulated High Glucose-Induced Rat Mesangial Cell Dysfunction via mTOR/p70S6K/4E-BP1 Pathway
The aim of this study was to investigate whether alpha lipoic acid (LA) regulates high glucose-induced mesangial cell proliferation and extracellular matrix production via mTOR/p70S6K/4E-BP1 signaling. The effect of LA on high glucose-induced cell proliferation, fibronectin (FN), and collagen type I (collagen-I) expression and its mechanisms were examined in cultured rat mesangial cells by methylthiazol tetrazolium (MTT) assay, flow cytometry, ELISA assay, and western blot, respectively. LA at a relatively low concentration (0.25 mmol/L) acted as a growth factor in rat mesangial cells, promoted entry of cell cycle into S phase, extracellular matrix formation, and phosphorylated AKT, mTOR, p70S6K, and 4E-BP1. These effects disappeared when AKT expression was downregulated with PI3K/AKT inhibitor LY294002. Conversely, LA at a higher concentration (1.0 mmol/L) inhibited high glucose-induced rat mesangial cell proliferation, entry of cell cycle into S phase, and extracellular matrix exertion, as well as phosphorylation of mTOR, p70S6K, and 4E-BP1 but enhanced the activity of AMPK. However, these effects disappeared when AMPK activity was inhibited with CaMKK inhibitor STO-609. These results suggest that LA dose-dependently regulates mesangial cell proliferation and matrix protein secretion by mTOR/p70S6K/4E-BP1 signaling pathway under high glucose conditions
Factor structure and measurement invariance of the problematic mobile phone use questionnaire-short version across gender in Chinese adolescents and young adults
Background: Problematic mobile phone use (PMPU) has become a public health issue in China, particularly in
adolescents and young adults. The Problematic Mobile Phone Use Questionnaire-Short Version (PMPUQ-SV) is a
validated instrument that measures multiple aspects of PMPU. The current study aimed to test the psychometric
characteristics of a Chinese adaption of the PMPUQ-SV and examine its measurement invariance across gender.
Methods: A total of 2086 participants were recruited form nine schools (six undergraduate colleges and three
vocational colleges) through an online platform. Measures included socio-demographic variables, patterns of mobile
phone use, the Chinese version of the PMPUQ-SV (C-PMPUQ-SV), the Chinese version of the Smartphone Addiction
Proneness Scale (C-SAPS), and the Depression Anxiety Stress Scales (DASS-21).
Results: Exploratory and confirmatory factor analyses conducted in two independent subsamples confirmed that
the postulated dimensions fit the data well. Four items, judged as either outdated or not adapted to the Chinese
context, performed poorly and were removed, resulting in a shorter 11-item scale. Convergent validity was
established through correlations between emotional symptoms and the C-PMPUQ-SV and addictive smartphone
use. Additional measurement invariance analyses showed that the scale performed largely similarly in male and
female participants.
Conclusions: The present study demonstrated that the C-PMPUQ-SV is an adequate instrument to study various
types of PMPU in Chinese adolescents and young adults. The updated 11-item scale shortens the evaluation time
and is adapted to assess contemporary smartphone use
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