The effect of Virtual CSR Co-Create on Users' Gameful Pleasure

Fei Zhou,Songling Xu,Yuanxi Ding Institute of Management Research 2023 Journal of East Asia Management Vol.4 No.2

With the progress of information technology and the rapid development of the gamification marketing, corporate marketing through virtual CSR co-create as customer acquisition, customer retention strategy has become the hot topic, but the reality results show that the effect of virtual CSR co-create fails to reach an enterprise's marketing purposes. Based on the success model of D&M information system, from the perspective of customer engagement, this study analyzes how enterprises achieve customer engagement and bring gameful experience to customers through gamification marketing in the context of virtual CSR co-create. The empirical results show that the quality of game information -- social interaction and sense of achievement in the context of virtual CSR co-create have a significant positive impact on consumers' gameful experience, and customer engagement plays a partial mediating role between social interaction, sense of achievement and consumers' gameful experience.

3D Focused Inversion of Near-bottom Magnetic Data from Autonomous Underwater Vehicle in Rough Seas

Zhou Fei,Tao Chunhui,Wu Tao,Zeng Zhaofa,Liu Cai 한국해양과학기술원 2018 Ocean science journal Vol.53 No.2

The observation area of an autonomous underwater vehicle (AUV) often contains undulating terrain in which the shallow portions make a great contribution to near-bottom magnetic data. Magnetic information from varying terrain may be inadvertently removed when traditional topographic correction methods are used to reduce the effect of undulating terrain on inversion results. In this study, we introduce a terrain-weighting matrix into the focused inversion process to overcome this problem. To counteract the natural decay of the potential field, we used the focused inversion with a minimum support function to obtain focused results and depth-weighting function. We also used the interpolation-iteration method to mitigate the influence of the fluctuating observation surface on the inversion results. We verified the effectiveness of the proposed method by conducting model tests using near-bottom data measured along the Southwest Indian Ridge (SWIR) by the AUV, Qianlong II. We obtained the 3D magnetization structure of the oceanic core complex (OCC) area at the 28th segment along the SWIR and concluded that the OCC was primarily composed of gabbroic rock.

TRIM22 promotes the proliferation of glioblastoma cells by activating MAPK signaling and accelerating the degradation of Raf-1

Fei Xiaowei,Dou Ya-nan,Sun Kai,Wei Jialiang,Guo Qingdong,Wang Li,Wu Xiuquan,Lv Weihao,Jiang Xiaofan,Fei Zhou 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-

The tripartite motif (TRIM) 22 and mitogen-activated protein kinase (MAPK) signaling pathways play critical roles in the growth of glioblastoma (GBM). However, the molecular mechanism underlying the relationship between TRIM22 and MAPK signaling remains unclear. Here, we found that TRIM22 binds to exon 2 of the sphingosine kinase 2 (SPHK2) gene. An ERK1/2-driven luciferase reporter construct identified TRIM22 as a potential activator of MAPK signaling. Knockout and overexpression of TRIM22 regulate the inhibition and activation of MAPK signaling through the RING-finger domain. TRIM22 binds to Raf-1, a negative regulator of MAPK signaling, and accelerates its degradation by inducing K48-linked ubiquitination, which is related to the CC and SPRY domains of TRIM22 and the C1D domain of Raf-1. In vitro and in vivo, an SPHK2 inhibitor (K145), an ERK1/2 inhibitor (selumetinib), and the nonphosphorylated mutant Raf-1S338A inhibited GBM growth. In addition, deletion of the RING domain and the nuclear localization sequence of TRIM22 significantly inhibited TRIM22-induced proliferation of GBM cells in vivo and in vitro. In conclusion, our study showed that TRIM22 regulates SPHK2 transcription and activates MAPK signaling through posttranslational modification of two critical regulators of MAPK signaling in GBM cells.

Damage and Fracture for Spheroidized Steels during Uniaxial Tensile Testing

Zhou, Fei.,Suh, Chang-Min,Kim, Seock-Sam 경북대학교 트라이볼로지연구소 2001 INTERNATIONAL SYMPOSIUM ON HIGH PERFORMANCE OF TRI Vol.2001 No.-

The mechanical properties, fracture behaviors and micro-mechnism of damage have been studied for three spheroidized steels. It is shown that void formation and growth induced by decohesion at the interface between the ferrite matrix and non-metallic particles or by particle cracking are the main reasons for the failure of these materials during plastic deformation. Experimental results show that the void volume fractions of these materials increase as strain increases, with the increasing rate being larger for the material with more carbide particles. Analytical expressions of strain hardening exponent and fracture strain for plastically damaged materials with second-phase particles are derived, and shown to be in good agreement with experimental data.

Probabilistic approaches for computational materials science

Fei Zhou 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.11-1

Robust and Fast Tracking via Joint Collaborative Representation

Fei Zhou,Guizong Zhang,Xinyue Fan,Dandan Yi 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.4

In this paper, we present a robust and fast tracking method based on joint collaborative representation. Traditional sparse coding based tracking methods code the candidates as a sparse linear combination of a series of object and trivial templates and perform time consuming L1 regularizations. In contrast to these methods, this paper adopts the L2-regularized least square models to reduce the computational complexity. The tracked object can be represented by the linear combination of a series of object templates, and also can be represented by candidate samples in the current frame. We propose a joint objective function to handle the tracking process. In addition, we introduce an effective update scheme to deal with the change of target appearance over time. Experiments on several challenging image sequences show that our proposed tracking method is robust and efficient.

Prevalence and Risk Factors of Cerebral Small Vessel Disease in a Chinese Population-Based Sample

Fei Han,Fei-Fei Zhai,Quan Wang,Li-Xin Zhou,Jun Ni,Ming Yao,Ming-Li Li,Shu-Yang Zhang,Li-Ying Cui,Zheng-Yu Jin,Yi-Cheng Zhu 대한뇌졸중학회 2018 Journal of stroke Vol.20 No.2

Background and Purpose Epidemiological data of cerebral small vessel disease (CSVD) in the general population of China are lacking. We report on the prevalence of lacunes, white matter hyperintensity (WMH), and cerebral microbleeds (CMBs) in a community-based sample in China and compare the results with those of other studies. Methods This was a cross-sectional analysis of the population-based Shunyi Study in China. A total of 1,211 stroke-free participants (mean age, 55.6±9.3 years; 37.4% men) with available 3 Tesla (3T) magnetic resonance images were included in this analysis. Demographic information and risk factor data were assessed. The overall and age-specific prevalence of lacunes, WMH, and CMBs was evaluated. Associations between cardiovascular risk factors and the presence of these lesions were analyzed by multiple logistic regression. Results Our study showed a prevalence of 14.5% for lacunes, 72.1% for periventricular hyperintensity (PVH), 65.4% for deep white matter hyperintensity (DWMH), and 10.6% for CMBs. When compared with other community-based samples, individuals in the same age group showed a higher burden of lacunes and a relatively lower prevalence of CMBs. Advanced age was independently associated with the prevalence of these CSVD markers, while the presence of hypertension increased the risk of lacunes, PVH/DWMH, and CMBs in deep or infratentorial locations. Conclusions A higher burden of lacunes but a relatively lower prevalence of CMBs was observed in this Chinese population. This notable result highlights the challenge of CSVD prevention in China. Chinese have a risk factor profile for CSVD similar to those in other populations.

Exploration of temperature effect on videogrammetric technique for displacement monitoring

Hua-Fei Zhou,Lin-Jun Lu,Zhao-Yi Li,Yi-Qing Ni 국제구조공학회 2020 Smart Structures and Systems, An International Jou Vol.25 No.2

There has been a sustained interest towards the non-contact structural displacement measurement by means of videogrammetric technique. On the way forward, one of the major concerns is the spurious image drift induced by temperature variation. This study therefore carries out an investigation into the temperature effect of videogrammetric technique, focusing on the exploration of the mechanism behind the temperature effect and the elimination of the temperature-caused measurement error. 2D videogrammetric measurement tests under monotonic or cyclic temperature variation are first performed. Features of measurement error and the casual relationship between temperature variation and measurement error are then studied. The variation of the temperature of digital camera is identified as the main cause of measurement error. An excellent linear relationship between them is revealed. After that, camera parameters are extracted from the mapping between world coordinates and pixels coordinates of the calibration targets. The coordinates of principle point and focal lengths show variations well correlated with temperature variation. The measurement error is thought to be an outcome mainly attributed to the variation of the coordinates of principle point. An approach for eliminating temperature-caused measurement error is finally proposed. Correlation models between camera parameters and temperature are formulated. Thereby, camera parameters under different temperature conditions can be predicted and the camera projective matrix can be updated accordingly. By reconstructing the world coordinates with the updated camera projective matrix, the temperature-caused measurement error is eliminated. A satisfactory performance has been achieved by the proposed approach in eliminating the temperature-caused measurement error.

Three partial mitochondrial genomes from Ips (Coleoptera: Curculionidae, Scolytinae) contribute to the phylogeny of Scolytinae

Lv Fei,Yang Wen-Yan,Chen Zhi-Teng,Xu Qiang,Zhou Yi-Jing,Du Yu-Zhou 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.3

Partial mitogenomes of three species from the genus Ips (Coleoptera; Curculionidae), Ips grandicollis, Ips sexdentatus and Ips typographus were sequenced and analyzed. The three mitogenomes are 11,553-bp with 28 genes, 13,135-bp with 30 genes, and 13,502-bp with 30 genes, respectively. Their gene arrangements are consistent with that of Drosophila yakuba. The three Ips species shared the conserved overlapping sequence motif “ATGATAG” between ATP8 and ATP6, using TTG as start codon for ND1 genes and TAG as stop codon for ATP8 genes. All tRNA genes could fold into typical cloverleaf structures except for tRNASer1. Three tRNASer1 genes lack the DHU arm and instead formed the D-loop. The phylogenetic analyses indicate that Scolytinae is paraphyly and belongs to Curculionidae. The Eurasian I. sexdentatus is sister group to the North American I. grandicollis and the Eurasian I. typographus. The phylogeny of Ips based on COI genes indicates that Ips is paraphyly, Ips perroti and Orthotomicus suturalis are sister groups and Ips spinifer is grouped with (Orthotomicus chaokhao + Orthotomicus erosus).

Modulated Gene Expression of Toxoplasma gondii Infected Retinal Pigment Epithelial Cell Line (ARPE-19) via PI3K/Akt or mTOR Signal Pathway

Wei Zhou,Juan-Hua Quan,Fei-Fei Gao,Hassan Ahmed Hassan Ahmed Isma,Young-Ha Lee,Guang-Ho Cha 대한기생충학열대의학회 2018 The Korean Journal of Parasitology Vol.56 No.2