Establishing Online Meeting Climate Types and Developing Measurements: Impact on Meeting Satisfaction

Xiu Jin,Fusheng Zheng,Sangwoo Hahm 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.8

In the post covid-19 era, organizations will experience a new environment. Advances in technologies such as AI and big data, and new experiences such as online meetings and lectures, will increase the use of online communication. Businesses will increasingly engage in online-based information sharing, virtual team operations, and online meetings. This study focuses on meeting climate and satisfaction, to improve the performance of online meetings. Existing studies on meeting climate presuppose off-line situations. Offline and online communication methods and meeting formats are different. This paper proposes new climate types to develop an appropriate climate for online-based meetings. To apply these climates in online meetings, a measurement scale was developed and the impact on online meeting satisfaction was verified. As a result of the study, it was found that the creativity-oriented meeting climate was the most important, and relation-oriented and participation-oriented meeting climates also had a significant effect, while the direction-oriented and task-oriented climates were relatively less important. This study develops new variables and measurements for online meeting climates, and explains their importance. Companies will be able to leverage the appropriate climates for online meetings to improve performance.

Using Online Information Support to Decrease Stress, Anxiety, and Depression

( Xiu Jin ),( Sangwoo Hahm ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.8

Today, online education is becoming more important. The effectiveness of online education has been measured by student satisfaction and the possibility of substituting offline education. This study proposes a plan to increase the effectiveness of education in a new form by using online information. Education is the process of socializing and growing learners. Representative negative emotions experienced by learners are stress, anxiety, and depression (SAD). A reduction in SAD will promote student growth and improve educational outcomes. This paper considers online information by dividing it into online educational information support (OEDIS) and online emotional information support (OEMIS). We demonstrate that OEDIS reduces SAD, and OEMIS reduces stress and anxiety. By providing online information, negative emotions can be reduced, and educational outcomes can be improved. This study suggests a new role for online information support, such as emotional change in individuals and solving psychological problems. Online information support goes beyond knowledge transfer and can be used in various fields, such as online education that promotes human growth and positive change, and even healthcare.

A Study on the Way to Improvement of Career Commitment and Life Satisfaction among Chinese Students Who Study in Korea

Xiu Jin 국제문화기술진흥원 2020 International Journal of Advanced Culture Technolo Vol.8 No.4

The current number of international students is gradually increasing in the world due to their passion for study or exchange students programs related to be affiliated with their universities. Many international students have great hope for their successful life of studying abroad. The factors that play a key role in successful study abroad can be seen as life satisfaction in host country and career commitment. Therefore, this study suggested the way to improve students' life satisfaction and career commitment among Chinese international students in Korea. It focused on social identification as a core factor in improving international student life satisfaction and career commitment. In addition, it also focused on social support as a factor to increase social identification. According to the results of empirical analysis, it was verified that perceived social support improves social identification among international students. In addition, social identification improves their life satisfaction and career commitment. Therefore, the mediating effect of social identification was found to be significant in the relationship between perceived social support and life satisfaction and career commitment. This study was verified that if international students perceive social support, they can experience social identification. This process can eventually lead to life satisfaction and career commitment. Based on these results, it emphasized that the role and importance of social identification. Finally, the practical implications and future research directions were discussed.

The influence of a first-order antedependence model and hyperparameters in BayesCπ for genomic prediction

Xiujin Li,Xiaohong Liu,Yaosheng Chen 아세아·태평양축산학회 2018 Animal Bioscience Vol.31 No.12

Objective : The Bayesian first-order antedependence models, which specified single nucleotide polymorphisms (SNP) effects as being spatially correlated in the conventional BayesA/B, had more accurate genomic prediction than their corresponding classical counterparts. Given advantages of BayesCπ over BayesA/B, we have developed hyper-BayesCπ, ante-BayesCπ, and ante-hyper-BayesCπ to evaluate influences of the antedependence model and hyperparameters for vg and on BayesCπ. Methods : Three public data (two simulated data and one mouse data) were used to validate our proposed methods. Genomic prediction performance of proposed methods was compared to traditional BayesCπ, ante-BayesA and ante-BayesB. Results : Through both simulation and real data analyses, we found that hyper-BayesCπ, ante-BayesCπ and ante-hyper-BayesCπ were comparable with BayesCπ, ante-BayesB, and ante-BayesA regarding the prediction accuracy and bias, except the situation in which ante-BayesB performed significantly worse when using a few SNPs and π = 0.95. Conclusion : Hyper-BayesCπ is recommended because it avoids pre-estimated total genetic variance of a trait compared with BayesCπ and shortens computing time compared with ante-BayesB. Although the antedependence model in BayesCπ did not show the advantages in our study, larger real data with high density chip may be used to validate it again in the future.

Experimental study of the influence of sodium salts as additive to NOxOUT process

Zhaoping Zhong,Xiujin Liang,Baosheng Jin,Xiaolin Chen,Weiling Li,Hongge Wei,Houkun Guo 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.5

An experimental study of the SNCR process with urea as reducing agent and sodium salts as additive has been carried out, and detailed analysis of the reaction mechanism has been given here. In the temperature range of 800-975 oC, NO concentration decreases at first and then increases while the concentration of N2O increases at first and then decreases with the increasing of temperature, and the turning point is 900 oC. With increasing of normalized stoichiometric ratio of reduction nitrogen to NOx (NSR), NO removal efficiency increases, while the concentration of N2O also increases, which decreases overall NOx removal efficiency. With sodium salts as additive, the concentration of N2O decreases with increasing of sodium salts addition at all temperatures, while the concentration of NO decreases at first and then increases at low-temperature side of the temperature window and increases at high-temperature side with additional increasing, whose changing extent is smaller than N2O. Since sodium salts as additive can remove N2O effectively and have no large influence on the removal of NO, the effect of sodium salts as additive is the combined effect of the production of active radicals and the removal of HNCO produced by the decomposition of urea through neutralization reactions, which is more important. To achieve the same effect under each condition, the needed addition of NaOH and CH3COONa is less than that of Na2CO3 counting as Na atom. For the decomposition of CH3COONa can produce CH3COO, its addition can promote the reduction of NO more obviously at the lower temperature than Na2CO3 or NaOH. Overall NOx removal efficiency at 900 oC with NSR=1.5 had been improved from about 30% to 70.45% through the addition of sodium salts. Sodium salts as additive caused the flue gas to become alkaline gas, but it was not serious for sodium salts existing as NaNCO.

High densification and anti-corrosion of graphene-coated aluminum coating deposited on AZ31B magnesium by low-pressure cold spray

Zhang Liuyan,Wang Xiujin,Wu Huishu,Mai Yongjin,Liu Cansen,Jie Xiaohua 한국탄소학회 2020 Carbon Letters Vol.30 No.5

In this paper, graphene-coated Al powders prepared by in situ reduction method were directly used for cold spraying, obtain�ing a graphene-reinforced Al matrix composite coating with more compact structure and better performance. Cross-sectional analysis revealed that compared with the pure Al powders, the graphene-coated Al powders were more severely deformed, and the resulting coating was denser and its porosity was reduced by over 80%. The hardness of the graphene-coated Al coating was increased by 40%, and its brine immersion time was prolonged by nearly three times. However, the graphene increases the pitting sensitivity of the Al coating; so, the enhanced corrosion resistance of the graphene-coated Al coating is mainly attributed to the improvement of its structure densifcation.

Inhibition of Invasion and Metastasis of MHCC97H Cells by Expression of Snake Venom Cystatin through Reduction of Proteinases Activity and Epithelial-Mesenchymal Transition

Nanhong Tang,Qun Xie,Xiaoqian Wang,Xiujin Li,Yanlin Chen,Xu Lin,Jianyin Lin 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.5

Snake venom cystatin (sv-cystatin) is a member of the cystatin family of cysteine protease inhibitors. To further evaluate the possibility of sv-cystatin in cancer therapy, this study examined the effects of sv-cystatin on the invasion and metastasis of liver cancer cells (MHCC97H) in vitro and in vivo as well as the underlying mechanism. sv-cystatin cDNA was transfected into MHCC97H cells and the anti-invasion and antimetastasis effects of sv-cystatin were determined using migration and matrigel invasion assays and a lung-metastasis mice model. The results suggest that sv-cyst clone (sv-cystatin expression in MHCC97H cells) delayed the invasion and metastasis in vitro and in vivo compared to the parental, mock and si-sv-cyst clone cells (inhibited sv-cystatin expression by siRNA). The decreased activities of cathepsin B, MMP-2 and MMP-9 and EMT change index including higher E-cadherin, lower N-cadherin and decreased Twist activity were observed in the sv-cyst clone, which contributes to the change in invasion and metastasis ability of MHCC97H cells. This study provides evidence that expression of the sv-cystatin gene in MHCC97H cells inhibits tumor cell invasion and metastasis through the reduction of the proteinases activity and Epithelial-Mesenchymal Transition (EMT), which might contribute to the anticancer research of the sv-cystatin protein.

Energy-Efficient Algorithm for Assigning Verification Tasks in Cloud Storage

( Guangwei Xu ),( Zhifeng Sun ),( Cairong Yan ),( Xiujin Shi ),( Yue Li ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.1

Mobile Cloud Computing has become a promising computing platform. It moves users` data to the centralized large data centers for users` mobile devices to conveniently access. Since the data storage service may not be fully trusted, many public verification algorithms are proposed to check the data integrity. However, these algorithms hardly consider the huge computational burden for the verifiers with resource-constrained mobile devices to execute the verification tasks. We propose an energy-efficient algorithm for assigning verification tasks (EEAVT) to optimize the energy consumption and assign the verification tasks by elastic and customizable ways. The algorithm prioritizes verification tasks according to the expected finish time of the verification, and assigns the number of checked blocks referring to devices` residual energy and available operation time. Theoretical analysis and experiment evaluation show that our algorithm not only shortens the verification finish time, but also decreases energy consumption, thus improving the efficiency and reliability of the verification.

VO-OV语序与相关语法参项组配研究分析

金立?(Jin Lixin),于秀金(Yu Xiujin) 계명대학교 국제학연구소 2011 국제학논총 Vol.16 No.-

This paper provides a brief review for the research into VO-OV word order and its correlated pairs of grammatical elements in linguistic typology. The generative scholars usually take a derivation approach to explaining language linear rules and universal word order, but problems still remain in cross-linguistic grammatical element movement. The typological researchers represented by Dryer put forward the Branching Direction Theory (BDT) to explain the word order of pairs of grammatical elements correlated with VO-OV, but BDT fails to expound why the order of verb, manner adverb, plural word and N" correlate with VO-OV, while that of adjective (or numeral) and noun un-correlates with VO-OV. The Constitute Recognized Domain (CRD) by Hawkins is also proved not to be the inevitable factor in the correlation between the word order of pairs of grammatical elements and VO-OV. This paper holds that left-right branching direction, strategies of structurally optimal combination and other functional factors contribute together to the correlation and un-correlation of the word order of pairs of grammatical elements with VO-OV.

Security Analysis of the Khudra Lightweight Cryptosystem in the Vehicular Ad-hoc Networks

( Wei Li ),( Chenyu Ge ),( Dawu Gu ),( Linfeng Liao ),( Zhiyong Gao ),( Xiujin Shi ),( Ting Lu ),( Ya Liu ),( Zhiqiang Liu ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.7

With the enlargement of wireless technology, vehicular ad-hoc networks (VANETs) are rising as a hopeful way to realize smart cities and address a lot of vital transportation problems such as road security, convenience, and efficiency. To achieve data confidentiality, integrity and authentication applying lightweight cryptosystems is widely recognized as a rather efficient approach for the VANETs. The Khudra cipher is such a lightweight cryptosystem with a typical Generalized Feistel Network, and supports 80-bit secret key. Up to now, little research of fault analysis has been devoted to attacking Khudra. On the basis of the single nibble-oriented fault model, we propose a differential fault analysis on Khudra. The attack can recover its 80-bit secret key by introducing only 2 faults. The results in this study will provides vital references for the security evaluations of other lightweight ciphers in the VANETs.