Preparation, Structural Investigation and Thermal Decomposition Behavior of Two High-Nitrogen Energetic Materials: ZTO·2H₂O and ZTO(phen)·H₂O

Ma, Cong,Huang, Jie,Zhong, Yi Tang,Xu, Kang Zhen,Song, Ji Rong,Zhang, Zhao Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.7

Two new high-nitrogen energetic compounds $ZTO{\cdot}2H_2O$ and $ZTO(phen){\cdot}H_2O$ have been synthesized (where ZTO = 4,4-azo-1,2,4-triazol-5-one and phen = 1,10-phenanthroline). The crystal structure, elemental analysis and IR spectroscopy are presented. Compound 1 $ZTO{\cdot}2H_2O$ crystallizes in the orthorhombic crystal system with space group Pnna and compound 2 $ZTO(phen){\cdot}H_2O$ in the triclinic crystal system with space group P-1. In $ZTO(phen){\cdot}H_2O$, there is intermolecular hydrogen bonds between the -NH group of ZTO molecule (as donor) and N atom of phen molecule (as acceptor). Thermal decomposition process is studied by applying the differential scanning calorimetry (DSC) and thermo thermogravimetric differential analysis (TG-DTG). The DSC curve shows that there is one exothermic peak in $ZTO{\cdot}2H_2O$ and $ZTO(phen){\cdot}H_2O$, respectively. The critical temperature of thermal explosion ($T_b$) for $ZTO{\cdot}2H_2O$ and $ZTO(phen){\cdot}H_2O$ is $282.21^{\circ}C$ and $195.94^{\circ}C$, respectively.

High-j Proton h11/2 and g7/2 Intruder Bands in 113In

Ma Ke Yan,Lu Jing Bin,Ma Ying Jun,Li Jian,Yang Dong,Sun Wu Ji,Wang Hao,Pan Hao Nan,Wang Jia Qi,Yang Qing Yu,Zhang Da Ming,Zhu Li Hua,Wu Xiao Guang,Zheng Yun,Li Cong Bo 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.12

Excited states of 113In have been populated through the heavy-ion fusion evaporation reaction 110Pd(7Li, 4n)113In. A new band with the configuration of a proton d5/2 orbital is identified. Two ΔI = 2 intruder bands, built on the πh11/2 and the πg7/2 orbitals, have been extended to spins (63/2-)ħ and (55/2+)ħ, respectively. The negative-parity πh11/2 intruder band shows a smooth increase in aligned spin, which is attributed to a strong proton-neutron interaction. The properties of the positive-parity πg7/2 band are discussed based on tilted axis cranking model calculations, and the features of the antimagnetic rotation for this band are shown after backbend. Furthermore, the contributions of the two-shears-like mechanism, the neutron (gd)ν shell and the core rotation are investigated for the positive-parity πg7/2 band.

Experimental Feasibility Research on a High-efficiency Cement-based Clay Stabilizer

Ma Cong,Chen Bing,Chen Longzhu 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.1

In many civil engineering constructions, soft clayey soils are often stabilized with Ordinary Portland Cement (OPC) whose production process is energy intensive and emits a large quantity of CO2. In this paper, an OPC-based clay stabilizer (CSCN) which contains some eco-friendly materials is studied to compare with OPC by investigating the mechanical properties of the stabilized clays. Microstructural and mineralogical studies using Scanning Electron Microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) are performed to reveal the mechanisms controlling the development of the strength and modulus. The test results indicate that the compressive strength and secant modulus increase with increasing the content of CSCN and curing age. To achieve the equivalent improvement of the strength and modulus, much less CSCN is needed relative to OPC, which illustrates that CSCN can be a more effective and relatively eco-friendly clay stabilizer. The analysis on pH values and moisture consumption indicates that the hydration and pozzolanic reactions in CSCN-stabilized clays may be quicker than those in OPC-stabilized clays. The microstructural analyses confirm the formation of C-S-H gels in stabilized clays and the types of C-S-H gels are dependent upon the Ca/Si molar ratio according to EDX results. The types and amounts of new minerals in stabilized clays are the possible mechanisms controlling the enhancement of mechanical properties.

Preparation, Structural Investigation and Thermal Decomposition Behavior of Two High-Nitrogen Energetic Materials: ZTO·2H2O and ZTO(phen)·H2O

Cong Ma, Jie Huang,Jie Huang,Yi Tang Zhong,Kangzhen Xu,Jirong Song,Zhao Zhang 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.7

Two new high-nitrogen energetic compounds ZTO·2H2O and ZTO(phen)·H2O have been synthesized (where ZTO = 4,4-azo-1,2,4-triazol-5-one and phen = 1,10-phenanthroline). The crystal structure, elemental analysis and IR spectroscopy are presented. Compound 1 ZTO·2H2O crystallizes in the orthorhombic crystal system with space group Pnna and compound 2 ZTO(phen)·H2O in the triclinic crystal system with space group P-1. In ZTO(phen)·H2O, there is intermolecular hydrogen bonds between the -NH group of ZTO molecule (as donor) and N atom of phen molecule (as acceptor). Thermal decomposition process is studied by applying the differential scanning calorimetry (DSC) and thermo thermogravimetric differential analysis (TG-DTG). The DSC curve shows that there is one exothermic peak in ZTO·2H2O and ZTO(phen)·H2O, respectively. The critical temperature of thermal explosion (Tb) for ZTO·2H2O and ZTO(phen)·H2O is 282.21 oC and 195.94 oC, respectively.

모션 포스터 디자인(Motion Poster Design)의 리듬(Rhythm) 활용에 관한 연구

마총 ( Ma Cong ),정원준 ( Chung Won-jun ) 커뮤니케이션디자인학회 2022 커뮤니케이션 디자인학연구 Vol.78 No.-

전자기기와 디지털스크린의 보급, SNS미디어의 쇼트클립 영상 콘텐츠 지원 등으로 디자이너는 이번보다 훨씬 더 다양한 창작 수단 및 공간을 누리게 되었다. 한편, 이러한 뉴미디어의 발전은 포스터 디자인의 형식에 큰 변화를 일으켰다. 최근 몇 년 동안 기존의 평면 형식 포스터가 아닌 모션디자인을 도입한 포스터디자인이 점점 증가하고 있다. 정적인 지면 포스터에 비해 모션포스터는 사람들의 시선을 끄는 데 더 효과적이며 연구자 역시 포스터 디자인의 ‘모션디자인화’의 발전 가능성이 크다고 사료된다. 기존 연구를 보면, 모션 포스터 디자인에 관한 연구는 거의 없는 실정이며 ‘모션 포스터’의 개념에 대한 명확한 정의 역시 부재하다. 그러나, 현재 비즈니스 및 SNS미디어 상에서는 모션 포스터가 널리 유행하고 있으며 그 효과와 미디어 역시 각양각색이다. 이에 본 연구는 내용분석법과 사례분석법을 통해 시간성을 지닌 시각적 요소인 리듬(Rhythm)이 모션디자인에 활용될 수 있는 가능성을 분석하고자 한다. 이를 위해 먼저 문헌자료를 통해 리듬의 표현 형식을 분류 및 정리한 다음, 모션디자인(Motion Design)의 표현 기법을 분석함으로써 무빙 포스터(Moving posters)의 정의와 표현 형식에 관하여 논의한다. With the popularization of electronic devices and digital screens, social media supports short video functions, allowing designers to generate more creative space. The development of new media has changed the type of poster design. In recent years, many graphic posters have been added to dynamic design, so that the poster is not just a static presentation. Compared with static flat posters, dynamic posters can attract the attention of viewers. The author sees the possibility of dynamic poster design. So far, there are few researches on dynamic poster design, and there is no clear definition of terms. However, dynamic posters are very popular in business and social media, with various effects and media. This research uses content analysis and case analysis to analyze Rhythm (Rhythm). Because Rhythm is a time-based visual element, it is possible to introduce dynamic design. Firstly, it discusses the manifestation of rhythm through literature and conducts classification and induction. Secondly, it analyzes the performance methods of Motion Design, and then discusses the definition and manifestation of moving posters.

Effect of anti-skin disorders of ginsenosides- A Systematic Review

Lele Cong,Jinli Ma,Yundong Zhang,Yifa Zhou,Xianling Cong,Miao Hao 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.5

Ginsenosides are bioactive components of Panax ginseng with many functions such as anti-aging, antioxidation,anti-inflammatory, anti-fatigue, and anti-tumor. Ginsenosides are categorized into dammarane,oleanene, and ocotillol type tricyclic triterpenoids based on the aglycon structure. Based on thesugar moiety linked to C-3, C-20, and C-6, C-20, dammarane type was divided into protopanaxadiol (PPD)and protopanaxatriol (PPT). The effects of ginsenosides on skin disorders are noteworthy. They play antiagingroles by enhancing immune function, resisting melanin formation, inhibiting oxidation, andelevating the concentration of collagen and hyaluronic acid. Thus, ginsenosides have previously beenwidely used to resist skin diseases and aging. This review details the role of ginsenosides in the anti-skinaging process from mechanisms and experimental research.

Adaptive robust target tracking control of marching tank under high-speed maneuvering condition

Cong Li,Guolai Yang,Xiuye Wang,Yuze Ma,Liqun Wang,Quanzhao Sun 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.6

This paper focuses on the problem of target tracking control of marching tanks under the condition of high-speed maneuver based on sliding mode disturbance observer. First, the dynamic model of marching tank is established by using multi-body dynamics software. The nonlinear factors such as barrel flexibility, clearance between barrel and bushing, and uncertainty sources such as road excitation are considered. Second, the mechatronics model of tank bidirectional stabilization system considering transmission clearance and friction is established in numerical simulation software. Aiming at the tank bidirectional stabilization system, an adaptive robust controller based on sliding mode disturbance observer is designed. Finally, the real-time control and target tracking of the tank bidirectional stabilization system are realized by co-simulation. The results show that the sliding mode disturbance observer improves the stability accuracy of the system by 43.22 %. Comparing the simulation results with the PID control, the controller designed in this paper has the characteristics of rapid tracking speed and high robustness, and the advantage is more obvious under the condition of highspeed maneuver.

Regional-scale rice-yield estimation using stacked auto-encoder with climatic and MODIS data: a case study of South Korea

Ma, Jong-Won,Nguyen, Cong-Hieu,Lee, Kyungdo,Heo, Joon Informa UK (TaylorFrancis) 2019 International journal of remote sensing Vol.40 No.1

Effect of composite biological preservative containing Lactobacillus plantarum on postharvest litchi quality

Cong Xu,Wen-feng Hu,Shi Luo,Hua-jian Luo,Ke Ma,Yan-fang Li 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.6

Biological preservatives containing live microorganisms are environmentally friendly and non-toxic substances used to preserve the quality of fresh fruits. This study investigated whether a composite biological preservative containing live Lactobacillus plantarum (designated as DN003) could preserve the quality of postharvest litchi fruits at high temperature and in humid environment. Postharvest litchi fruits were briefly soaked in DN003, then dried and stored at 29–33oC with 95–98% relative humidity; prochloraz treatment was included as positive control and non-treatment as negative control. In comparison with negative control group, litchi fruits in both DN003-treated and positive control groups better retained their appearance with lower polyphenol oxidase and peroxidase activities and showed higher concentrations of vitamin C, titratable acids, and total sugar content. These data demonstrated that the new composite biological preservative containing L. plantarum is promising to be used in the preservation of postharvest litchi fruit, particularly in hightemperature and humid environment.

Effect of composite biological preservative containing Lactobacillus plantarum on postharvest litchi quality

Xu, Cong,Hu, Wen-feng,Luo, Shi,Luo, Hua-jian,Ma, Ke,Li, Yan-fang 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.6

Biological preservatives containing live microorganisms are environmentally friendly and non-toxic substances used to preserve the quality of fresh fruits. This study investigated whether a composite biological preservative containing live Lactobacillus plantarum (designated as DN003) could preserve the quality of postharvest litchi fruits at high temperature and in humid environment. Postharvest litchi fruits were briefly soaked in DN003, then dried and stored at $29-33^{\circ}C$ with 95-98% relative humidity; prochloraz treatment was included as positive control and non-treatment as negative control. In comparison with negative control group, litchi fruits in both DN003-treated and positive control groups better retained their appearance with lower polyphenol oxidase and peroxidase activities and showed higher concentrations of vitamin C, titratable acids, and total sugar content. These data demonstrated that the new composite biological preservative containing L. plantarum is promising to be used in the preservation of postharvest litchi fruit, particularly in high-temperature and humid environment.