Solidification of uranium mill tailings by MBS-MICP and environmental implications

Niu Qianjin,Li Chunguang,Liu Zhenzhong,Li Yongmei,Meng Shuo,He Xinqi,Liu Xinfeng,Wang Wenji,He Meijiao,Yang Xiaolei,Liu Qi,Liu Longcheng 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.10

Uranium mill tailing ponds (UMTPs) are risk source of debris flow and a critical source of environmental U and Rn pollution. The technology of microbial induced calcium carbonate precipitation (MICP) has been extensively studied on reinforcement of UMTs, while little attention has been paid to the effects of MICP on U & Rn release, especially when incorporation of metakaolin and bacillus subtilis (MBS). In this study, the reinforcement and U & Rn immobilization role of MBS -MICP solidification in different grouting cycle for uranium mill tailings (UMTs) was comprehensively investigated. The results showed that under the action of about 166.7 g/L metakaolin and ~50% bacillus subtilis, the solidification cycle of MICP was shortened by 50%, the solidified bodies became brittle, and the axial stress increased by up to 7.9%, and U immobilization rates and Rn exhalation rates decrease by 12.6% and 0.8%, respectively. Therefore, the incorporation of MBS can enhance the triaxial compressive strength and improve the immobilization capacity of U and Rn of the UMTs bodies solidified during MICP, due to the reduction of pore volume and surface area, the formation of more crystals general gypsum and gismondine, as well as the enhancing of coprecipitation and encapsulation capacity

Effect of Exogenous Nitric Oxide on Vegetative and Reproductive Growth of Oriental Lily ‘Siberia’

Meng Wang,Bin Li,Yong-Chao Zhu,Li-Juan Niu,Xin Jin,Qing-Qing Xu,Wei-Biao Liao 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.5

Recent studies have shown that nitric oxide (NO) may be involved in diverse plant developmental processes as an important signal molecule. However, the effects of NO on vegetative and reproductive growth of intact plants are not fully understood. In our study, the NO donor sodium nitroprusside (SNP) at 3,000, 6,000 and 9,000 μM was used to characterize the roles of NO in vegetative and reproductive growth of “Siberia” lily. The results showed that the effects of NO on growth in “Siberia” lily were dose-dependent. Compared with the control (distilled water treatment), 3,000 μM SNP caused a significant increase in plant height and internode length. Significant differences were recorded in flowering period, lifetime of individual flowers, number of flowers per plant, flower diameter, and bud length with 6,000 μM SNP. However, 9,000 μM SNP resulted in negative effects on these parameters as compared to the control. Moreover, 3,000 μM SNP caused a significant increase in the contents of leaf chlorophyll, water soluble carbohydrate (WSC), starch, total carbohydrate, total soluble protein, and total nitrogen, all of which were decreased by high levels of SNP (9,000 μM). Together, these results indicated that NO treatments at the proper dosage can promote vegetative and reproductive growth, possibly by improving the levels of leaf chlorophyll, WSC, starch, total carbohydrate, total soluble protein and total nitrogen.

해양 주제 전시 애니메이션의 감정 상호작용 디자인 연구

명판모(Meng Fanmo),우명혜(Niu Minghui),정호남(Zheng Xianheng),왕홍(Wang Hong),조정형(Cho Jounghyung) 한국기초조형학회 2022 한국기초조형학회 학술발표논문집 Vol.2022 No.11

상장지수펀드(ETF) 보유 지분이 개별 구성 주식의 변동성에 미치는 영향 - 중국 주식시장으로부터의 시사점

동맹(Meng Dong),우지강(Zhi-Gang Niu),백강(Kang Baek) 한국FP학회 2024 Financial Planning Review Vol.17 No.2

본 논문은 중국 상장지수펀드(Exchange Traded Fund: ETF)를 대상으로, ETF 보유 여부 및 지분율이 개별 구성 주식의 변동성에 어떤 영향을 미치는지 분석하였다. 본 논문은 ETF 보유 지분이 개별 구성 주식의 변동성에 어떤 영향을 미치는지 탐색하고, 특히 중국 주식시장의 맥락에서 이러한 관계를 분석하는 것을 목적으로 한다. 분석 결과, 첫째, ETF에 포함된 지분이 많을수록 개별 구성 주식의 변동성은 주식시장의 변동성과 유의한 음(-)의 상관관계가 있다는 것을 발견하였다. 둘째, 시장 상황을 상승과 하락으로 구분한 분석에서는 시장이 전반적으로 상승하면 개별 주식의 변동성이 감소하는 반면, 시장이 전반적으로 하락하면 개별 주식의 변동성이 증가하는 것으로 나타났다. 마지막으로, 분석표본의 시가총액에 따른 이질성 분석 결과, 시가총액이 작은 기업보다 큰 기업에서 ETF 보유에 따른 주식 변동성 감소 효과는 높은 것으로 나타났다. 본 논문은 중국 주식시장에 대한 투자자와 정책 입안자의 이해를 높이고, 보다 효율적이고 안정적인 시장 환경을 조성하는 데 기여할 수 있다. This study analyzed the effect of ETF ownership on stock volatility using Chinese stock market data and ETF fund data as analysis samples. This paper reports the impact of ETFownership on the volatility of individual constituent stocks, particularly in the context of the Chinese stock market. First, a greater share included in an ETF indicated a more significant negative correlation between the volatility of individual constituent stocks and the volatility of the stock market. Second, an analysis that divided market conditions into rising and falling found that individual stock volatility generally decreases when the market rises and vice versa. Finally, an analysis of heterogeneity based on the market capitalization of the sample revealed a stronger effect of ETF ownership in reducing stock volatility in larger companies than in smaller companies. This paper enhances the understanding of investors and policymakers about the Chinese stock market and contributes to developing a more efficient and stable market environment.

해양주제 회화 작품 디자인의 조형언어에 관한 연구 - 항구 테마에 기초한 중심으로 -

우명혜(Niu Minghui),명판모(Meng Fanmo),왕홍(Wang Hong),정호남(Zheng Xianheng),조정형(Cho Jounghyung) 한국기초조형학회 2022 한국기초조형학회 학술발표논문집 Vol.2022 No.11

Detection and Monitoring of Potential Geological Disaster Using SBAS-InSAR Technology

Wei Niu,Xiaonong Hu,Bo Lin,Fanqi Meng,Yong Zhang,Jin Zhao 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.11

As a global geological environment problem, geological disasters are more likely to induce severe geological disasters and cause loss of personnel and property due to their suddenness and concealment, frequent heavy rainfall and regular extreme weather. In this paper, Sentinel-1A data and DEM data combined with short baseline synthetic aperture interferar (SBAS-InSAR) technology are used to analyze and calculate the spatial-temporal evolution characteristics of surface deformation in Zibo-Weifang area of Shandong Province during 2016-2019. Linear fitting of InSAR monitoring deformation results is performed using level monitoring data to verify the accuracy of the results. The findings indicate that surface deformation in most of the study area is relatively stable, but in some areas, especially near Lucun Town, the maximum negative deformation rate exceeds 80mm/a. Based on the surface deformation results, a total of 377 potential geological disasters are identified using an integrated multi-source stereo observation system of the sky and ground. This identification is done by observing optical remote sensing images and taking the absolute value of surface deformation rate greater than 10 mm/a as the judgment basis, along with ground investigation and review. Several typical geological disaster sites are screened and they are found to be in unstable state. The research results can provide scientific support for geological disaster prevention and control in Shandong Province.

TLF: Two-level Filter for Querying Extreme Values in Sensor Networks

( Min Meng ),( Jie Yang ),( Yu Niu ),( Young-koo Lee ),( Byeong-soo Jeong ),( Sungyoung Lee ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.1

Sensor networks have been widely applied for data collection. Due to the energy limitation of the sensor nodes and the most energy consuming data transmission, we should allocate as much work as possible to the sensors, such as data compression and aggregation, to reduce data transmission and save energy. Querying extreme values is a general query type in wireless sensor networks. In this paper, we propose a novel querying method called Two-Level Filter (TLF) for querying extreme values in wireless sensor networks. We first divide the whole sensor network into domains using the Distributed Data Aggregation Model (DDAM). The sensor nodes report their data to the cluster heads using push method. The advantages of two-level filter lie in two aspects. When querying extreme values, the number of pull operations has the lower boundary. And the query results are less affected by the topology changes of the wireless sensor network. Through this method, the sensors preprocess the data to share the burden of the base station and it combines push and pull to be more energy efficient.

Image Steganography via Fully Exploiting Modification Direction

Xuejing Niu,Meng Ma,Rui Tang,Zhaoxia Yin 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.5

An approach for deformation modulus mechanism of super-high arch dams

Bangbin Wu,Jingtai Niu,Huaizhi Su,Meng Yang,Zhongru Wu,Xinbo Cui 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.69 No.5

The reservoir basin bedrock produced significant impact on the long-term service safety of super-high arch dams. It was important for accurately identifying geomechanical parameters and its evolution process of reservoir basin bedrock. The deformation modulus mechanism research methods of reservoir basin bedrock deformation modulus for super-high arch dams was carried out by finite element numerical calculation of the reservoir basin bedrock deformation and in-situ monitoring data analysis. The deformation modulus inversion principle of reservoir basin bedrock in a wide range was studied. The convergence criteria for determining the calculation range of reservoir basin of super-high arch dams was put forward. The implementation method was proposed for different layers and zones of reservoir basin bedrock. A practical engineering of a super-high arch dam was taken as the example.

Glucosamine induces cell death $via$ proteasome inhibition in human ALVA41 prostate cancer cell

Liu, Bao-Qin,Meng, Xin,Li, Chao,Gao, Yan-Yan,Li, Ning,Niu, Xiao-Fang,Guan, Yifu,Wang, Hua-Qin Korean Society for Biochemistry and Molecular Bion 2011 Experimental and molecular medicine Vol.43 No.9

Glucosamine, a naturally occurring amino monosaccharide, has been reported to play a role in the regulation of apoptosis more than half century. However the effect of glucosamine on tumor cells and the involved molecular mechanisms have not been thoroughly investigated. Glucosamine enters the hexosamine biosynthetic pathway (HBP) downstream of the rate-limiting step catalyzed by the GFAT (glutamine:fluctose- 6-phosphate amidotransferase), providing UDP-GlcNAc substrates for O-linked ${\beta}$-N-acetylglucosamine (O-GlcNAc) protein modification. Considering that O-GlcNAc modification of proteasome subunits inhibits its activity, we examined whether glucosamine induces growth inhibition $via$ affecting proteasomal activity. In the present study, we found glucosamine inhibited proteasomal activity and the proliferation of ALVA41 prostate cancer cells. The inhibition of proteasomal activity results in the accumulation of ubiquitinated proteins, followed by induction of apoptosis. In addition, we demonstrated that glucosamine downregulated proteasome activator $PA28{\gamma}$ and overexpression of $PA28{\gamma}$ rescued the proteasomal activity and growth inhibition mediated by glucosamine. We further demonstrated that inhibition of O-GlcNAc abrogated $PA28{\gamma}$ suppression induced by glucosamine. These findings suggest that glucosamine may inhibit growth of ALVA41 cancer cells through downregulation of $PA28{\gamma}$ and inhibition of proteasomal activity via O-GlcNAc modification.