917 research outputs found
Research on the Trade Effects of China’s Direct Investment in ASEAN
Based on the data of China’s direct investment and trade in ASEAN countries from 2004 to 2018, this paper established a variable parameter model, variable intercept model and constant coefficient model with panel data, and investigated the heterogeneous impact of China’s direct investment in ASEAN countries on their import and export trade and the impact mechanism. It is found that China’s direct investment in ASEAN will be deposited in the trade between China and 10 ASEAN countries, creating effects for trade, and the size of the effect varies with the host country. On average, when other factors remain unchanged, every 1 percentage point increase in China’s direct investment flows to ASEAN countries will increase exports to ASEAN countries by 0.54%, imports will increase by 0.44%. Further studies have found that our country to Brunei, Indonesia, the Philippines, Singapore and Thailand’s export create effect is greater than the imported create effect, on the whole, China’s investment in the five countries promoted the net exports, mainly on its investment in China, led to many mechanical equipment and other related products exports, and imports mainly import countries have their comparative advantages of products, variety is less
Physiological Responses in a Variable Environment: Relationships between Metabolism, Hsp and Thermotolerance in an Intertidal-Subtidal Species
Physiological responses to temperature reflect the evolutionary adaptations of organisms to their thermal environment and the capability of animals to tolerate thermal stress. Contrary to conventional metabolism theory, increasing environmental temperatures have been shown to reduce metabolic rate in rocky–eulittoral-fringe species inhabiting highly variable environments, possibly as a strategy for energy conservation. To study the physiological adaptations of an intertidal-subtidal species to the extreme and unpredictable heat stress of the intertidal zone, oxygen consumption rate and heat shock protein expression were quantified in the sea cucumber Apostichopus japonicus. Using simulate natural temperatures, the relationship between temperature, physiological performance (oxygen consumption and heat shock proteins) and thermotolerance were assessed. Depression of oxygen consumption rate and upregulation of heat shock protein genes (hsps) occurred in sequence when ambient temperature was increased from 24 to 30°C. Large-scale mortality of the sea cucumber occurred when temperatures rose beyond 30°C, suggesting that the upregulation of heat shock proteins and mortality are closely related to the depression of aerobic metabolism, a phenomenon that is in line with the concept of oxygen- and capacity-limited thermal tolerance (OCLTT). The physiologically-related thermotolerance of this sea cucumber should be an adaptation to its local environment
Parental Psychological Control and Adolescent Aggressive Behavior: Deviant Peer Affiliation as a Mediator and School Connectedness as a Moderator
Abundant evidence has demonstrated an association between parental psychological control and adolescent aggressive behavior. However, the mediating and moderating mechanisms underlying this relation are still under-investigated. Grounded in the social development model and stress-buffering model, this study investigated whether deviant peer affiliation mediates the relation between parental psychological control and adolescent aggressive behavior, and whether this indirect link is moderated by school connectedness. A total of 4265 adolescents (Meanage = 13.66 years, SD = 2.74, 48.63% male) from southern China completed questionnaires regarding parental psychological control, deviant peer affiliation, school connectedness, and aggressive behavior. Structural equation models revealed that the relation between parental psychological control and aggressive behavior is partially mediated by deviant peer affiliation. Moreover, this indirect link was stronger for adolescents with low levels of school connectedness than for those with high levels of school connectedness. This study thus identifies the potential underlying mechanism by which parental psychological control is associated with adolescent aggressive behaviors, which has important implications for theory and prevention
Study of neutron density fluctuation and neutron-proton correlation in Au+Au collisions using PYTHIA8/Angantyr
Utilizing the PYTHIA8 Angantyr model, which incorporates the multiple-parton
interactions (MPI) based color reconnection (CR) mechanism, we study the
relative neutron density fluctuation and neutron-proton correlation in Au+Au
collisions at = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and
200 GeV. In this study, we have not only delved into the dependence of these
two remarkable observations on rapidity, centrality, and energy, but also
presented an analysis of their interplay with the MPI and CR. Our results have
shown that the light nuclei yield ratio of proton, deuteron, and triton,
expressed by the elegant expression , remains unchanged even as
the rapidity coverage and collision centrality increase. Interestingly, we have
also revealed that the effect of CR is entirely dependent on the presence of
MPI; CR has no impact on the yield ratio if MPI is off. Our findings further
demonstrate that the light nuclei yield ratio experiences a slight increase
with increasing collision energy as predicted by the PYTHIA8 Angantyr model,
but it cannot describe the non-monotonic trend observed by the STAR experiment.
Based on the Angantyr model simulation results, it is essential not to overlook
the correlation between neutron and proton fluctuations. The Angantyr model is
a good baseline for studying collisions in the absence of a Quark-Gluon Plasma
(QGP) system, given its lack of flow and jet quenching.Comment: arXiv admin note: text overlap with arXiv:2211.03297 by other author
Sensation Seeking, Deviant Peer Affiliation, and Internet Gaming Addiction Among Chinese Adolescents: The Moderating Effect of Parental Knowledge
Although there is abundant evidence that an association between sensation seeking and adolescent Internet gaming addiction (IGA) exists, research has provided little insight into why adolescents with high sensation seeking are more likely to be focused on Internet and video games. Grounded in the social development model and ecological systems theory, this study investigated whether deviant peer affiliation mediated the relationship between sensation seeking and adolescent IGA, and whether this indirect link was moderated by parental knowledge. Participants were 1293 Chinese adolescents (49.65% male, Mage = 12.89 ± 0.52 years) who completed questionnaires assessing sensation seeking, deviant peer affiliation, parental knowledge, and IGA. Structural equation models revealed that the positive association between sensation seeking and adolescent IGA was partially mediated by deviant peer affiliation. In addition, this indirect link was significantly moderated by parental knowledge. Specifically, the indirect path from sensation seeking to adolescent IGA was stronger for adolescents with low parental knowledge than for those with high parental knowledge. Identifying the role of peers and parents in the onset of adolescent IGA has key implications for prevention and intervention
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Redox signaling in aging kidney and opportunity for therapeutic intervention through natural products.
Kidney diseases are serious public problems with high morbidity and mortality in the general population and heavily retard renal function with aging regardless of the cause. Although myriad strategies have been assigned to prevent or harness disease progression, unfortunately, thus far, there is a paucity of effective therapies partly due to an insufficient knowledge of underlying pathological mechanisms, indicating deeper studies are urgently needed. Additionally, natural products are increasingly recognized as an alternative source for disease intervention owing to the potent safety and efficacy, which might be exploited for novel drug discovery. In this review, we primarily expatiate the new advances on mediators that might be amenable to targeting aging kidney and kidney diseases, including nicotinamide adenine dinucleotide phosphate oxidase (NOX), transforming growth factor-β (TGF-β), renin-angiotensin system (RAS), nuclear factor-erythroid 2 related factor 2 (Nrf2), peroxisome proliferator-activated γ receptor (PPARγ), advanced glycation endproducts (AGEs) as well as microRNAs and vitagenes. Of note, we conclude by highlighting some natural products which have the potential to facilitate the development of novel treatment for patients with myriad renal diseases
The 2021 X-ray outburst of magnetar SGR J1935+2154 -- I. Spectral properties
Over a period of multiple active episodes between January 2021 and January
2022, the magnetar SGR J1935+2154 emitted a total of 82 bursts observed by
GECAM-B. Temporal and spectral analyses reveal that the bursts have an average
duration of 145 ms and a fluence ranging from $1.2 \times 10^{-8} \
\mathrm{erg \cdot cm^{-2}}3.7 \times 10^{-5} \ \mathrm{erg \cdot
cm^{-2}}E_{\mathrm{peak}}\alphakT_{\mathrm{min}} \sim 5$ keV of the MBB model, which is
consistent between GECAM-B and GBM-GECAM. This indicates that both samples
originated from similar magnetar bursts. We also reveal the spectra of magnetar
bursts tend to be soft. It indicates that magnetar bursts may be composed of
multiple low BB temperatures and the majority of the BB temperatures are
concentrated around the minimum temperature
Aplikasi Image Thresholding Untuk Segmentasi Objek
Salah satu operasi di dalam analisis citra adalah segmentasi citra, yaitu memisahkan objek dari latar belakangnya atau dari objek lain yang tidak menjadi perhatian. Metode sementasi yang sederhana adalah dengan operasi pengambangan (thresholding). Operasi pengambangan menghasilkan citra biner, yang dalam hal ini objek yang diacu di-set berwarna putih sedangkan latar belakangnya di-set berwarna hitam (atau sebaliknya bergantung kasusnya). Makalah ini mempresentasikan penggunaan operasi pengambangan untuk melakukan segmentasi objek. Eksperimen dilakukan dengan menggunakan kakas MATLAB. Hasil eksperimen memperlihatkan bahwa pemilihan nilai ambang (threshold) yang tepat sangat menentukan keberhasilan segmentasi
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