687 research outputs found
Research on the influence of family capital on academic achievement of first-generation college students in China
ObjectiveThe objective of this study is to explore the influence of family capital (including family economic capital, family cultural capital and family social capital) on the academic achievement (including ability development, academic performance and self-concept) of first-generation college students.MethodsThe questionnaires are based on the CFPS (China Family Panel Studies) database and tailored to the specific circumstances. Data was collected from 1524 first-generation college students from five universities in Liaoning Province. SPSS 23.0 and AMOS 24.0 were used to analyze the data.ResultsFamily economic capital significantly predicted ability development (standardized regression coefficient = 0.198, P < 0.001) and academic performance (standardized regression coefficient = 0.220, P < 0.001); Family cultural capital significantly predicted ability development (standardized regression coefficient = .114, P < 0.001), academic performance (standardized regression coefficient = 0.217, P < 0.001) and self-concept (standardized regression coefficient = 0.160, P < 0.001); Family social capital significantly predicted academic performance (standardized regression coefficient=0.084, P < 0.01) and self-concept (standardized regression coefficient = 0.156, P < 0.001).ConclusionFamily capital can significantly affect the academic achievement of first-generation college students. To bridge the gap of academic achievement caused by family capital for first-generation college students and promote class mobility, special attention should be paid to the internal actions of students in higher education fields, the connection between different fields should be strengthened, and humanistic care for disadvantaged groups should be implemented
Application of ultrasonic inspection in monitoring dynamic healing of mandibular fracture in rabbit model
AbstractObjectiveTo investigate the feasibility of ultrasonic diagnosis for monitoring fracture healing.MethodsThirty rabbit models with fraction of mandible body were established by surgically removing partial lower jawbone. At the 1st, 2nd, 4th, 6th, 8th and 12th week after the operation, they were examined by X-ray and ultrasound, respectively. All detection results were scored according to a generally accepted standard. Spearman rank correlation analysis was conducted to explore the relationship between the results of the two inspection methods.ResultsIn each healing stage, the results of the ultrasonic inspection were basically consistent with those of the X-ray examination, as supported by a Spearman rank correlation coefficient of 0.892 (P<0.001).ConclusionsNon-invasive ultrasonic inspection can be used instead of X-ray examination to monitor and diagnose fracture healing
The decays: an opportunity for scalar glueball hunting
The scalars closest to 1.5 GeV contain the mesons ,
and , and the latter two ones are usually viewed as the
potential candidates for the scalar glueballs. In this work, by including the
important contributions from the vertex corrections, we study the decays within the improved perturbative QCD approach and analyze the
possible scalar glueball hunting. Together with the two mixing models, namely,
being the primary scalar glueball in model I (II), and
two classification scenarios, namely, being the excited
(ground) states in scenario 1 (2), the branching fractions associated with
their ratios for are evaluated comprehensively. The
predictions with still large uncertainties in the considered two mixing models
are roughly consistent with currently limited data, which indicates that both
more rich data and more precise predictions are urgently demanded to figure out
the scalar glueball clearly in the future. Moreover, several interesting ratios
between the branching fractions of and that could
help us to understand the nature of scalar are defined and predicted
theoretically. These ratios should be examined in future experiments.Comment: 28 pages, 3 figures, 6 tables; revised version according to referee's
comments; contents improved and references adde
A new species of Fordiophyton (Sonerileae, Melastomataceae) from Yunnan, China
Fordiophyton jinpingense (Melastomataceae; Sonerileae), a species occurring in south-eastern Yunnan, China, is described as new, based on morphological and molecular data. Phylogenetic analyses, based on nrITS sequence data, showed that, except F. breviscapum, all species sampled in Fordiophyton formed a strongly supported clade in which two geographical lineages were recovered. The generic placement of F. jinpingense is well supported by phylogenetic analyses and a character combination of 4-merous flowers, distinctly dimorphic stamens and the connectives basally not calcarate. Molecular divergence and morphological evidence indicate that F. jinpingense is well separated from other members of the genus, thus justifying its recognition as a distinct species. Fordiophyton jinpingense is phylogenetically closest to F. repens, but differs markedly from the latter in stem morphology (short, obtusely 4-sided vs. long, 4-angular), habit (erect vs. creeping), leaf size (6β16.5 Γ 4.5β13 cm vs. 4β7.5 Γ 4β6.5 cm) and flower number per inflorescence (5β13 vs. 3β6)
Solar microwave millisecond spike at 2.84 GHz
Using the high time resolution of 1 ms, the data of solar microwave millisecond spike (MMS) event was recorded more than two hundred times at the frequency of 2.84 GHz at Beijing (Peking) Observatory since May 1981. A preliminary analysis was made. It can be seen from the data that the MMS-events have a variety of the fast activities such as the dispersed and isolated spikes, the clusters of the crowded spikes, the weak spikes superimposed on the noise background, and the phenomena of absorption. The marked differences from that observed with lower time resolution are presented. Using the data, a valuable statistical analysis was made. There are close correlations between MMS-events and hard X-ray bursts, and fast drifting bursts. The MMS events are highly dependent on the type of active regions and the magnetic field configuration. It seems to be crucial to find out the accurate positions on the active region where the MMS-events happen and to make co-operative observations at different bands during the special period when specific active regions appear on the solar disk
Long-Term Nucleos(t)ide Analogues Therapy for Adults With Chronic Hepatitis B reduces the Risk of Long-Term Complications: a meta-analysis
<p>Abstract</p> <p>Background</p> <p>The effect of antiviral therapy in chronic hepatitis B (CHB) on reducing the risk of long-term complications (LTCs) remains unclear so far. To study whether long-term nucleos(t)ide analogues therapy can reduce the risk of long-term complications.</p> <p>Methods</p> <p>We searched MEDLINE, EMBASE, OVID, the Cochrane Central Register of Controlled Trials. Relative risks (RRs) of long-term complications with or without treatment were studied. Also subgroup analyses including the status of drug-resistance, HBeAg and pre-existing compensated cirrhosis were done using relative risks of long-term complications either with or without treatment or among nucleos(t)ide analogues treatment groups.</p> <p>Results</p> <p>Six eligible studies (3644 patients in all) were included. Data showed the incidence of long-term complications in treatment groups was induced by 74%(RR:0.26, 95% CI: 0.15-0.47) compared with no treatment. Whether drug-resistant happened or not during the long-term therapy, the incidence of long-term complications was still significantly induced respectively by 45%(RR: 0.55,95%CI:0.40-0.76) and 78% (RR:0.22, 95%CI: 0.13-0.36). For both different status of HBeAg and pre-existing compensated cirrhosis, there was significant lower incidence of long-term complications in treatment groups compared with no treatment, too. Moreover, among the NA treatment groups, patients with drug-resistance had 2.64 times (RR:2.64, 95%CI: 1.58-4.41) higher chance of developing to long-term complications, and patients with pre-existing compensated cirrhosis also had 3.07 times (RR:3.07, 95%CI: 1.04-9.11) higher chance of developing to long-term complications.</p> <p>Conclusions</p> <p>Long-term nucleos(t)ide analogue therapy for adults with CHB prevents or delays the development of long-term complications including decompensated cirrhosis, CHB-related death or CHB-related HCC in patients with CHB. The patients who need take antiviral drugs should receive the antiviral therapy as soon as possible.</p
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