Development of a High-Wire Cucumber Production System on Raised-Troughs with Supplemental Lighting for Year-Round Production

Xiuming Hao,Athanasios P. Papadopoulos,Shalin Khosla 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Effects of Heat Placement on Energy Consumption, Microclimate, Plant Growth and Fruit Yield of Greenhouse Tomatoes Grown on Raised-Troughs

Xiuming Hao,Md. Saidul Borhan,Shalin Khosla,Athanasios P. Papadopoulos,Jingming Zheng 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

백두산 화산 폭발시 화산성 지진에 의한 조적조 건축물의 피해예측: 백두산 인근지역부터 국내 서울지역까지

백은림,김정현,Xiuming Cui,오상훈,이상호 한국외국어대학교 국제지역연구센터 2014 국제지역연구 Vol.18 No.3

Recently, some researchers have raised the possibility of volcanic eruption for Mt. Baekdu and theresearches about the evaluation and prediction of volcanic damage have been conducted. Volcaniceruption of Mt. Baekdu can accompany the volcanic earthquake. In that case, many buildings couldbe damaged by the earthquake from nearby area of the mountain to Seoul area in South Korea. Especially, many low-rise masonry buildings have been settled on nearby area of it and that kind ofbuildings are very vulnerable for earthquake load. If the earthquake happens, it is predicted thatextensive losses related with human life and property would be caused as masonry buildings aredamaged. And it will affect northeast asia economy. So it is important to predict damage by thevolcanic earthquake. In this study, the volcanic earthquake was assumed and damage probability ofthe masonry buildings by the earthquake depending on distance from the epicenter was evaluated. For this, the seismic fragility curves at the regions(Kirin area in China and Seoul in Korea) werepresented. And the damage cost by the earthquake was estimated using the fragility curve. As theresult, it was estimated that if large earthquake more than M 8 happens, the great part of thebuildings on the nearby area of the mountain would be destroyed and the building in Seoul would bedamaged a little. 최근 백두산 화산 폭발의 가능성이 제기되고 있는 가운데, 화산 폭발시 예상되는 피해를최소화하기 위한 연구가 이루어지고 있다. 백두산 화산이 폭발할 경우, 그로 인한 화산성 지진이 발생하게 되고 이 지진에 의해 백두산 인근 지역 및 원거리에 위치한 국내의 서울·인천 지역까지도 피해가 발생할 것으로 예상되고 있다. 특히 백두산 인근지역은 중국 길림성 및 북한북부 근처로 지진에 취약한 구조형식인 조적조 건축물이 주로 건축되어져 있어 화산성 지진발생시 막대한 인명 및 재산피해가 발생할 것으로 예상된다. 이들 피해는 동북아 국제경제에도 큰 영향을 미칠 가능성이 있으므로, 화산성 지진으로 인한 조적조 건축물의 피해를 예측하는 것은 매우 중요하다 하겠다. 본 연구에서는 백두산 화산폭발 시나리오를 가정하여, 화산성지진의 거리감쇠에 따른 거리별 도달 지진 강도를 예상하고, 그에 따른 조적조 건축물의 피해정도를 예측하였다. 중국 및 국내 조적조 건축물의 지진취약도 함수를 제시하고, 그에 따라 손상정도에 따른 피해확률 및 피해금액을 예측하였다. 그 결과 규모 8 이상의 화산성 지진이 발생할 경우, 백두산 근교의 조적조 건축물은 대부분이 파괴될 것으로 예측되었다. 또한 백두산으로부터 약 500km 가량 떨어진 국내 서울지역에서도 조적조 건축물에 경미한 손상이 다수발생할 것으로 예측되었다.

Stability of zeros of power series equations

Zhihua Wang,Xiuming Dong,Themistocles M. Rassias,정순모 대한수학회 2014 대한수학회보 Vol.51 No.1

We prove that if |a1| is large and |a0| is small enough, then every approximate zero of power series equation P∞ n=0 anxn = 0 can be approximated by a true zero within a good error bound. Further, we obtain Hyers-Ulam stability of zeros of the polynomial equation of degree n, anzn + an−1zn−1 + · · · + a1z + a0 = 0 for a given integer n > 1.

MapReduce-based web mining for prediction of web-user navigation

Li, Meijing,Yu, Xiuming,Ryu, Keun Ho SAGE Publications 2014 JOURNAL OF INFORMATION SCIENCE Vol.40 No.5

<P>Predicting web user behaviour is typically an application for finding frequent sequence patterns. With the rapid growth of the Internet, a large amount of information is stored in web logs. Traditional frequent-sequence-pattern-mining algorithms are hard pressed to analyse information from within big datasets. In this paper, we propose an efficient way to predict navigation patterns of web users by improving frequent-sequence-pattern-mining algorithms based on the programming model of MapReduce, which can handle huge datasets efficiently. During the experiments, we show that our proposed MapReduce-based algorithm is more efficient than traditional frequent-sequence-pattern-mining algorithms, and by comparing our proposed algorithms with current existed algorithms in web-usage mining, we also prove that using the MapReduce programming model saves time.</P>

STABILITY OF ZEROS OF POWER SERIES EQUATIONS

Wang, Zhihua,Dong, Xiuming,Rassias, Themistocles M.,Jung, Soon-Mo Korean Mathematical Society 2014 대한수학회보 Vol.51 No.1

We prove that if ${\mid}a_1{\mid}$ is large and ${\mid}a_0{\mid}$ is small enough, then every approximate zero of power series equation ${\sum}^{\infty}_{n=0}a_nx^n$=0 can be approximated by a true zero within a good error bound. Further, we obtain Hyers-Ulam stability of zeros of the polynomial equation of degree n, $a_nz^n$ + $a_{n-1}z^{n-1}$ + ${\cdots}$ + $a_1z$ + $a_0$ = 0 for a given integer n > 1.

Fatigue Limit of Shot Peened LC9 Aluminum Alloy

WANG, Shengping,Yongjun, LI Xiuming, CHANG,YANG, Yuhui,YAO, Mei,WANG, Renzhi 대한금속재료학회(대한금속학회) 1996 METALS AND MATERIALS International Vol.2 No.2

The effects of shot peening on the three-point bending fatigue limit are described for LC9 aluminum alloy. Examination of the fatigue fracture surfaces revealed that the fatigue cracks were initiated under the hardened layer, depending upon the compressive residual stress (CRS) distribution. In this case, the local fatigue limit at the fatigue source is about 1.38 times of that of unstrengthened ones. An explanation is given with reference to the. concept of internal fatigue limit σ_(wi), which is regarded as the critical stress to initiate propagative fatigue microcrack in the interior of metal, and an intrinsic property of metal

A transcriptome analysis uncovers Panax notoginseng resistance to Fusarium solani induced by methyl jasmonate

Diqiu Liu,Qin Zhao,Xiuming Cui,Rui Chen,Xin Li,Bingling Qiu,Feng Ge 한국유전학회 2019 Genes & Genomics Vol.41 No.12

Background Panax notoginseng is a famous Chinese herbal medicine, but the root rot disease mainly caused by Fusarium solani severely reduces the yield and quality of its medicinal materials. Objective The defense priming in P. notoginseng through exogenous application of signaling molecule will supply theoretical support for the exogenous regulation of disease resistance in P. notoginseng. Methods In this study, the exogenous application of methyl jasmonate (MeJA) increased P. notoginseng’s resistance to F. solani. Furthermore, the P. notoginseng transcriptome during F. solani infection was investigated through next-generation sequencing to uncover the resistance mechanism of P. notogingseng induced by MeJA. Results The de novo assembly of transcriptome sequences produced 80,551 unigenes, and 36,771 of these unigenes were annotated by at least one database. A differentially expressed gene analysis revealed that a large number of genes related to terpenoid backbone biosynthesis, phenylalanine metabolism, and plant–pathogen interactions were predominantly upregulated by MeJA. Moreover, jasmonic acid (JA) biosynthesis-related genes and the JA signaling pathway genes, such as linoleate 13S-lipoxygenase, allene oxide cyclase, allene oxide synthase, TIFY, defensin, and pathogenesis-related proteins, showed increased transcriptional levels after inoculation with F. solani. Notably, according to the gene expression analysis, JA and ethylene signaling pathways may act synergistically to positively regulate the defense responses of P. notoginseng to F. solani. Conclusion JA signaling appears to play a vital role in P. notoginseng responses to F. solani infection, which will be helpful in improving the disease resistance of P. notoginseng cultivars as well as in developing an environmentally friendly biological control method for root rot disease.

Post-immobilization of Modified Macromolecular Reagents using Assembled Penicillin Acylase for Microenvironmental Regulation of Nanopores and Enhancement of Enzyme Stability

Cheng Zhou,Shemin Zhu,Xiuming Wu,Bo Jiang,Tao Cen,Shubao Shen 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.3

Penicillin acylase (PA) is known to regulate the microenvironment of nanospores. In this study, nanopores containing chemically-modified macromolecules co-assembled with immobilized PA were constructed. We also investigated the various types of functionalized mesocellular siliceous foams (MCFs) commonly used for the immobilization of PA by measuring the catalytic performance and stability of each PA preparation. Amino-MCF activated by p-benzoquinone was chosen as the optimum support for PA immobilization. Successful modification of macromolecules was verified by FT-IR and ultraviolet (UV)spectroscopy. The specific activity of PA co-assembled with dextran 10 k was 99.1 U/mg, which was 1.5-fold that of pristine immobilized PA, while the optimum pH was shifted to neutral. Compared to pristine immobilized and free PA, the optimum temperatures for the modified PA were 5 and 10oC higher, respectively. The residual activity of the ficoll derivative of PA after treatment at 50oC for 6 h was 70%, and this was later increased to 214.5% compared to that of pristine immobilized PA. The dextran 10 k derivative of PA exhibited 90.2% residual activity after 25times of continuous use. The results show that chemicallymodified macromolecules co-assembled with PA in amino-MCF provided a suitable microenvironment for enzyme stability.

Effect of Different Varieties, Processing Methods, Harvesting Times, and Storage Periods on the Quality of Maca

Tingting Xu,Xiaoya Chen,Xiuming Cui,Chengxiao Wang,Lisha Qiu 한국원예학회 2023 원예과학기술지 Vol.41 No.4

Maca, Lepidium meyenii Walpers (Brassicaceae), has been the subject of much research due to its unique biological activity. Maca is widely distributed in Yunnan Province, China, but is not well recognized in the market. In this study, through a chemical analysis, high-performance liquid chromatography (HPLC), and principal component analysis (PCA), the nutritional and bioactive components of different varieties, processing methods, harvesting times, and storage periods of maca were determined and analyzed. The results indicated that whole maca when dried at 35°C, harvested around the winter solstice and planted at an altitude of about 3,000 meters was favorable for the production of nutrients and bioactive components. Compared to black maca, yellow maca had higher levels of glucosinolates, flavonoids, alkaloids and macamides. In addition, a shorter storage period (less than one year) of maca leads to a higher content of bioactive components. The findings here provide a scientific basis for the cultivation and origin processing of maca