2,111 research outputs found
Study on the Rheological Properties and Constitutive Model of Shenzhen Mucky Soft Soil
In order to obtain the basic parameters of numerical analysis about the time-space effect of the deformation occurring in Shenzhen deep soft-soil foundation pit, a series of triaxial consolidated-undrained shear rheology tests on the peripheral mucky soft soil of a deep foundation pit support were performed under different confining pressures. The relations between the axial strain of the soil and time, as well as between the pore-water pressure of the soil and time, were achieved, meanwhile on the basis of analyzing the rheological properties of the soil, the relevant rheological models were built. Analysis results were proved that the rheology of Shenzhen mucky soft soil was generally viscous, elastic, and plastic, and had a low yield stress between 90 and 150 kPa. The increase in pore-water pressure made the rheological time effect of the mucky soft soil more remarkable. Thus, the drainage performance in practical engineering should be improved to its maximum possibility extent to decrease the soft-soil rheological deformation. Lastly, a six-component extended Burgers model was employed to fit the test results and the parameters of the model were determined. Findings showed that the extended Burgers model could satisfactorily simulate the various rheological stages of the mucky soft soil. The constitutive model and the determination of its parameters can be served as a foundation for the time-space effect analysis on the deformation of deep soft-soil foundation pits
The role and possible molecular mechanism of valproic acid in the growth of MCF-7 breast cancer cells
Aim To investigate the role of valproic acid (VPA), a class I
selective histone deacetylase inhibitor, on Michigan Cancer
Foundation (MCF)-7 breast cancer cells, named and explore
its possible molecular mechanism.
Methods MCF-7 cells were cultured with sodium valproate
(0. 5-4.0 mmol/L) for 24 h, 48 h, and 72 h in vitro, respectively.
The cell viability, apoptosis, and cell cycle were examined.
The activities and protein expressions of caspase-3,
caspase-8, and caspase-9 were subsequently assayed. Finally,
mRNA and protein expressions of cyclin A, cyclin D1,
cyclin E, and p21 were analyzed.
Results Sodium valproate suppressed MCF-7 cell growth,
induced cell apoptosis, and arrested G1 phase in a timeand
concentration- dependent manner, with the relative
cell viabilities decreased, cell apoptosis ratios increased,
and percentage of G1 phase enhanced (P < 0.05). Increased
activity of caspase-3 and caspase-9, but not caspase-8, and
increased protein levels were found under sodium valproate
(2.0 mmol/L, 48h). P21 was up-regulated and cyclin
D1 was down-regulated at both mRNA and protein levels
under sodium valproate (2.0 mmol/L, 48h)(P < 0.05), although
cyclin E and cyclin A remained changed.
Conclusion These results indicate that VPA can suppress
the growth of breast cancer MCF-7 cells by inducing apoptosis
and arresting G1 phase. Intrinsic apoptotic pathway is
dominant for VPA-induced apoptosis. For G1 phase arrest,
p21 up-regulation and down-regulation of cyclin D1 may
be the main molecular mechanism
Pathogenic Network Analysis Predicts Candidate Genes for Cervical Cancer
Purpose. The objective of our study was to predicate candidate genes in cervical cancer (CC) using a network-based strategy and to understand the pathogenic process of CC. Methods. A pathogenic network of CC was extracted based on known pathogenic genes (seed genes) and differentially expressed genes (DEGs) between CC and normal controls. Subsequently, cluster analysis was performed to identify the subnetworks in the pathogenic network using ClusterONE. Each gene in the pathogenic network was assigned a weight value, and then candidate genes were obtained based on the weight distribution. Eventually, pathway enrichment analysis for candidate genes was performed. Results. In this work, a total of 330 DEGs were identified between CC and normal controls. From the pathogenic network, 2 intensely connected clusters were extracted, and a total of 52 candidate genes were detected under the weight values greater than 0.10. Among these candidate genes, VIM had the highest weight value. Moreover, candidate genes MMP1, CDC45, and CAT were, respectively, enriched in pathway in cancer, cell cycle, and methane metabolism. Conclusion. Candidate pathogenic genes including MMP1, CDC45, CAT, and VIM might be involved in the pathogenesis of CC. We believe that our results can provide theoretical guidelines for future clinical application
Advanced Volleyball Stats for All Levels: Automatic Setting Tactic Detection and Classification with a Single Camera
This paper presents PathFinder and PathFinderPlus, two novel end-to-end
computer vision frameworks designed specifically for advanced setting strategy
classification in volleyball matches from a single camera view. Our frameworks
combine setting ball trajectory recognition with a novel set trajectory
classifier to generate comprehensive and advanced statistical data. This
approach offers a fresh perspective for in-game analysis and surpasses the
current level of granularity in volleyball statistics. In comparison to
existing methods used in our baseline PathFinder framework, our proposed ball
trajectory detection methodology in PathFinderPlus exhibits superior
performance for classifying setting tactics under various game conditions. This
robustness is particularly advantageous in handling complex game situations and
accommodating different camera angles. Additionally, our study introduces an
innovative algorithm for automatic identification of the opposing team's
right-side (opposite) hitter's current row (front or back) during gameplay,
providing critical insights for tactical analysis. The successful demonstration
of our single-camera system's feasibility and benefits makes high-level
technical analysis accessible to volleyball enthusiasts of all skill levels and
resource availability. Furthermore, the computational efficiency of our system
allows for real-time deployment, enabling in-game strategy analysis and
on-the-spot gameplan adjustments.Comment: ICDM workshop 202
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