DOES HAZE PROMOTE PRO-ENVIRONMENTAL BEHAVIOR? THE INFLUENCE OF AIR QUALITY ON PRO-ENVIRONMENTAL BEHAVIOR OF CHINESE RESIDENTS

Guanghua Sheng,Jiatong Dai,Hong Pan,Siyu Che 글로벌지식마케팅경영학회 2020 Global Marketing Conference Vol.2020 No.11

Compaction and Mechanical Characteristics and Stabilization Mechanism of Carbonated Reactive MgO-Stabilized Silt

Guanghua Cai,Songyu Liu 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.7

The reinforcement technology of carbonation based on reactive magnesia (MgO) and carbon dioxide (CO2) is a low-carbon and high-efficiency foundation treatment method. This paper investigates the compaction, mechanical and microstructural characteristics of carbonated reactive MgO-stabilized silt with varying MgO-soil ratios, carbonation time and water-soil ratios. The results indicate that the maximum dry density of uncarbonated reactive MgO-stabilized silt increases while the optimum moisture content reduces compared to the parent soil. The unconfined compressive strength of reactive MgO-stabilized soil was found to have increased after CO2 carbonation for several hours. With increasing MgO-soil ratio and carbonation time, the failure mode changes from elasticplastic to brittleness, and the failure strain of carbonated specimens mainly ranges between 0.8% and 1.6% and the ratio of the deformation modulus to unconfined compressive strength is about 30 to 200. The water-soil ratio has a slight influence on the evolution of strength. Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) analyses have indicated that the carbonation products facilitate the strength growth of reactive MgO-stabilized silt. Thermogravimetric analysis (TGA) shows that CO2 uptake increases with increasing carbonation time and achieves the highest under the MgO-soil ratio of 20%, carbonation time of 6 h, and water-soil ratio of 25%. The stabilization mechanism of carbonated reactive MgO-stabilized silt is proposed according to microstructure analyses, providing a deeper understanding of the application of the reactive MgO carbonation technology in the ground reinforcement.

Effect of MgO Activity Index on Physicochemical, Electrical and Mechanical Properties of Carbonated MgO-admixed Silt

Guanghua Cai,Songyu Liu,Guangyin Du,Liang Wang 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.9

The natural soil will have a significant strength improvement when admixed with reactive magnesia (MgO) and subjected to CO2 carbonation, which has been identified as an innovative and environment-friendly technique in the domain of soil treatment. MgO activity has been revealed to have a significant influence on the treatment effectiveness during the carbonation process. With this in view, the effect of MgO activity index on physicochemical, electrical and strength properties of carbonated silt was investigated. Results show that the MgO activity index and initial water-MgO ratio play crucial roles in controlling the aforementioned properties. With the initial water-MgO ratio reducing or MgO activity index increasing, the mass increment ratio, growth rate of unit weight, pH, resistivity, strength and CO2 sequestration increase to different degrees, while the volume increment ratio, water content, specific gravity, porosity and saturation degree decrease. The unconfined compressive strength shows a better linear relation with resistivity, indicating the applicability of resistivity method in the strength evaluation of carbonated MgO-admixed soil. Moreover, the thermal and microstructural analyses have explained the changing mechanism of physicochemical, electrical and strength properties. Finally, the analysis of the CO2 sequestration indicates that the carbonated MgO-admixed silt could achieve a high carbonation degree when the initial water-MgO ratio is less than 2.0, showing the feasibility of MgO carbonation in the CO2 sequestration.

Grinding Experiment by Direct Position/Force Control with On-line Constraint Estimation

Guanghua Chen,Mamoru Minami,Geng Wang 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

Based on the analyses of the interaction between a manipulator’s hand and a working object, a model rep-resenting the constrained dynamics of the robot is first discussed. The constrained forces are expressed by analgebraic function of states, input generalized forces, and constraint condition, and then direct position/force controller with out force sensoris proposed based on the algebraic relation. To give the grinding system the ability to adapt to any object shape being changed by itself, we added new estimating function of time-varying constraint condition in realtime for the adaptive position/force control. Evaluations through simulations and real grinding experiments by fitting the changing constraint surface with spline functions, indicate that reliable position/force control and shape-grinding can beachieved by the proposed methodology.

中國における勞働紛爭處理システムの現状と課題

彭光華(Peng Guanghua) 강원대학교 비교법학연구소 2010 江原法學 Vol.30 No.-

This paper analyzes China’s Labour Dispute Resolution System by examining its characteristics and tasks it is confronted with. In accordance with Labour Law (1995), China’s Labour Dispute Resolution System is characterised by three-step procedural structures, that is, ‘One Conciliation, One Arbitration, and Two Litigations’ (yitiao yicai ershen). Conciliation is made mainly through Labour Dispute Conciliation Committee at the enterprise level. Furthermore, Law on Conciliation and Arbitration (2008) extends the conciliation institution to ‘people’s conciliation organisations established according to the law’ and ‘the organisations with the functions of labour dispute conciliations founded at the levels of counties, towns and neighbourhood.’ Arbitration is carried out via the arbitration institution under the jurisdiction of arbitration committees that are established by the governments at the county level or above. This is the primary institution and means of current China’s labour dispute resolution. Litigations are undertaken by the courts. However, China’s labour dispute litigation proceeds within the system of ‘four levels, two litigations’: labour dispute litigations are undertaken mainly at the primary courts and intermediate courts (if the first litigation is conducted at the intermediate courts, the second litigation then proceed to the high court). Consequently, labour dispute cases cannot be proceed to the Supreme Court. Therefore, it is difficult to form the legal principles for jurisprudence as the basis of labour dispute resolution in China. On the other hand, according to China’s Labour Statistics Year Books (1995-2009), the incidence of labour dispute has kept growing. The cases of collective disputes and the number of people involved have been increasing dramatically. Most of labour disputes occurred in the economically developed areas. This can be predicted that the labour disputes may maintain a growing trend in the next few years, and may spread to inland provinces. Therefore, it is necessary to clarify the tasks of China’s labour dispute resolution, via the analysis of reasons for and resolution systems of labour disputes occurred in six South-eastern provinces. The reasons for high incidence of China’s labour disputes are extremely complicated. It is partly due to lack of law-abiding consciousness of entrepreneurs, workers’ weak awareness of labour rights, imbalance between actors of labour relations and absence of representatives of labour rights, as well as insufficient labour inspection system. The main reason, however, is the vulnerable dispute prevention system of trade unions and the absence of collective bargaining system. Therefore, to establish an effective China’s labour dispute resolution systems, firstly, it is necessary to improve the law-abiding consciousness of entrepreneurs, to strengthen the functions of labour inspections and trade unions, as well as to set up the collective bargaining system, in order to inhibit the high incidence of labour disputes. In addition to enhance the administrative arbitration functions, it is necessary to effectively implement different kinds of conciliations stipulated in Law on Conciliation and Arbitration. The key tasks of strengthening arbitration, implementing conciliation, and effectively settle China’s labour disputes are to educate a group of people with abundant knowledge and experience, including arbitrators.

對上古文獻若干文型的再檢討及從此看上古漢語語序問題

龐光華(PANG GUANGHUA) 한국교통대학교 동아시아연구소 2008 동아문헌연구 Vol.- No.-

《文心雕龍》新論二則

龐光華(Pang Guanghua) 한국교통대학교 동아시아연구소 2012 동아문헌연구 Vol.- No.-

Cornin increases angiogenesis and improves functional recovery after stroke via the Ang1/Tie2 axis and the Wnt/b-catenin pathway

Yangyang Xu,Guanghua Zhang,Zechun Kang,Yong Xu,Wangling Jiang,Shuping Zhang 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.1

We investigated whether cornin, an iridoid glycoside isolated from fruits of Verbena officinalis L., regulated angiogenesis and thereby improved functional outcomes after stroke and discovered a potential mechanism. The effects of cornin on proliferation of rat artery smooth muscle cell (RASMC) and signalling was investigated in vitro. Adult male rats were subjected to 1 h of middle cerebral artery occlusion (MCAO) and reperfusion and treated with or without 25 mg/kg of cornin, starting 24 h after ischemia and reperfusion, by continuous intravenous injection daily for 14 days. Neurological functional tests were performed and cerebral Evans blue extravasation was measured. Angiogenesis and angiogenic factor expressions were measured by immunohistochemistry and Western blotting, respectively. Cornin increased the proliferation of RASMC and enhanced the expression of Wnt5a, b-catenin, cyclin D1 and angiopoietin-1 (Ang1). Cornin treatment promoted angiogenesis in the ischemic brain core and improved functional outcomes after stroke. Cornin-treated MCAO rats showed significant increase in vascularization and expression of vascular endothelial growth factor and Ang1 and phosphorylation of Tie2 and Akt compared with vehicle-treated MCAO rats. The Ang1/ Tie2 axis and Wnt/b-catenin pathways appear to mediate cornin-induced angiogenesis.

The Fate of Soybean Photosynthetic Carbon Varies in Mollisols Differing in Organic Carbon

Jian Jin,Guanghua Wang,Judong Liu,Zhenhua Yu,Xiaobing Liu,Stephen J Herbert 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Upregulation of miR-27b Facilitates Apoptosis of TNF-α-Stimulated Fibroblast-Like Synoviocytes

Shangwen Lei,Guanghua Chen,Liang Deng,Jianying He 연세대학교의과대학 2019 Yonsei medical journal Vol.60 No.6

Purpose: The aim of this study was to explore the function of microRNA-27b (miR-27b) in fibroblast-like synoviocytes (FLSs)stimulated by tumor necrosis factor α (TNF-α). Materials and Methods: mRNA expression of miR-27b in FLS cells (MH7A) treated with or without TNF-α was determined by q-PCR. MiR-27b mimics was transfected into MH7A cells to upregulate miR-27b expression. MTT assay and flow cytometry analysiswere performed to investigate the effect of miR-27b on MH7A cell viability and apoptosis. The targets of miR-27b were predictedby TargetScan. The direct regulation of miR-27b on IL-1β expression was verified by luciferase assay. The protein expressionlevels of apoptosis-related proteins, IL-1β, and NF-κB signaling-related proteins were detected by Western blot. Results: We discovered that miR-27b expression was decreased in MH7A cells stimulated by TNF-α. Upregulation of miR-27b bymiR-27b mimics significantly inhibited the proliferation and promoted the apoptosis of TNF-α-stimulated MH7A cells. Consistently,upregulation of miR-27 decreased the level of Bcl-2 and increased Bax and caspase-3 expression in MH7A cells stimulated byTNF-α. Luciferase assay revealed that IL-1β was indeed a target of miR-27b. By quantitative real-time PCR and Western blot, wefound that the expression of IL-1β is negatively regulated by miR-27b. Moreover, the NF-κB signaling pathway was significantlyinhibited by miR-27b. Conclusion: Taken together, our results illustrated that enhanced miR-27b expression results in the suppression of proliferationand the promotion of apoptosis in FLSs stimulated by TNF-α, partially by regulating IL-1β expression and NF-κB signaling.