NONUNIQUE COINCIDENCE POINT THEOREMS FOR ĆIRIĆ TYPE MAPPINGS

Guan, Feng,Kang, Shin Min,Li, Jinsong,Liu, Zeqing The Kangwon-Kyungki Mathematical Society 2007 한국수학논문집 Vol.15 No.1

A few existence results of nonunique coincidence points for some kinds of $\acute{C}$iri$\acute{c}$ type mappings in metric and pseudocompact Tichonov spaces, respectively, are proved. The results presented in this paper extend some known results in the literature.

Involvement of adaptor protein, phosphotyrosine interacting with PH domain and leucine zipper 1 in diallyl trisulfide-induced cytotoxicity in hepatocellular carcinoma cells

Guan Feng,Ding Youming,He Yikang,Li Lu,Yang Xinyu,Wang Changhua,Hu Mingbai 대한약리학회 2022 The Korean Journal of Physiology & Pharmacology Vol.26 No.6

It has been demonstrated that APPL1 (adaptor protein, phosphotyrosine interacting with PH domain and leucine zipper 1) is involved in the regulation of several growth-related signaling pathways and thus closely associated with the development and progression of some cancers. Diallyl trisulfide (DAT), a garlic-derived bioactive compound, exerts selective cytotoxicity to various human cancer cells through interfering with pro-survival signaling pathways. However, whether and how DAT affects survival of human hepatocellular carcinoma (HCC) cells remain unclear. Herein, we tested the hypothesis of the involvement of APPL1 in DAT-induced cytotoxicity in HCC HepG2 cells. We found that Lys 63 (K63)-linked polyubiquitination of APPL1 was significantly decreased whereas phosphorylation of APPL1 at serine residues remained unchanged in DAT-treated HepG2 cells. Compared with wild-type APPL1, overexpression of APPL1 K63R mutant dramatically increased cell apoptosis and mitigated cell survival, along with a reduction of phosphorylation of STAT3, Akt, and Erk1/2. In addition, DAT administration markedly reduced protein levels of intracellular TNF receptor-associated factor 6 (TRAF6). Genetic inhibition of TRAF6 decreased K63-linked polyubiquitination of APPL1. Moreover, the cytotoxicity impacts of DAT on HepG2 cells were greatly attenuated by overexpression of wild-type APPL1. Taken together, these results suggest that APPL1 polyubiquitination probably mediates the inhibitory effects of DAT on survival of HepG2 cells by modulating STAT3, Akt, and Erk1/2 pathways.

Analysis of heat transfer performance of ORC direct contact heat exchanger by GRA-VMD-LSSVM model using optimization

Guanfeng Zheng,Qingtai Xiao,Shusheng Zhu,Hua Wang,Jian Geng,Shuang Zhao,Junwei Huang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.7

The relationship between heat transfer effect and influencing factors in direct contact with evaporator isstudied. It is important to optimize the design and setting of direct contact heat exchangers and further improve theheat transfer process of heat exchangers by understanding the influencing factors of direct contact evaporator. Themethods used are grey correlation analysis, variational mode decomposition and least square support vector machinealgorithm to calculate the experimental heat transfer coefficient. The conclusions are that grey relation analysis can findthe complex relationship between different influencing factors and reduce the amount of data to improve the accuracyof prediction. Hence, the novelty of this paper is to propose a simple, efficient and accurate hybrid prediction model forVHTC prediction. The place where it goes beyond previous efforts in the literature is that different influencing factorson the heat transfer performance in the direct contact heat transfer process are considered. The results show that theprediction accuracy of the heat transfer coefficient can be improved by 7% by optimizing the data only with grey correlationanalysis. The prediction accuracy can be improved up to 53% after using the hybrid model.

Three Levels Load Balancing on Cloudsim

Yongsheng Hao,Guanfeng Liu,Junwen Lu 보안공학연구지원센터(IJGDC) 2014 International Journal of Grid and Distributed Comp Vol.7 No.3

A New Expectation Trust Benefit Driven Algorithm for Grid Environments

Yongsheng Hao,Guanfeng Liu,Yuebin Xu,Junyan Wang 보안공학연구지원센터 2009 International Journal of Hybrid Information Techno Vol.2 No.1

Since the resource of nodes can access and leave the Grid system freely, it is possible some malicious nodes exist in the Grid environment. In addition, the numbers and qualities of nodes’ resource can be changed dramatically and optionally, so these malicious nodes must be affecting the utilization of Grid resource. Hence, the trust management mechanisms are developed and widely used in the resource scheduling for Grid environments. However, most of the trust management models are mainly focus on the nodes historic behaviors and few of them consider the future trust of the node based on its previous activities. This paper proposes a new method to detect the nodes behaviors of resource providers in Grid environments based on D-S theory. Through simulating experiments, the new mechanism could record the behaviors exactly and prevent the malicious ones accessing the Grid system effectively. It would give a strong support for the success of resource scheduling in Grid environments.

Traditional Dual Growing Rods With 2 Different Apical Control Techniques in the Treatment of Early-Onset Scoliosis

Shengru Wang,Yiwei Zhao,Guanfeng Lin,You Du,Yang Yang,Jianguo Zhang 대한척추신경외과학회 2023 Neurospine Vol.20 No.3

Objective: Based on traditional dual growing rods (TDGR), apical control techniques (ACTs) were introduced as adjuvant procedures to improve deformity correction at the apex segment in the treatment of early-onset scoliosis (EOS). We aimed to explore whether TDGR+ ACTs have different indications, attain more deformity correction, have negative effects on spinal growth, and have different complications. Methods: Between 2004 and 2019, a retrospective study of EOS patients treated with TDGR with or without ACTs was conducted and divided into 3 groups: TDGR group; hybrid technique (HT) group: Vertebrectomy/hemivertebrectomy with short fusion and TDGR; ACPS group: apical convex control pedicle screws (ACPS) and TDGR. Demographic, radiographic parameters, clinical outcomes, complications, and revisions were analyzed and compared. Results: Seventy-eight EOS patients were enrolled. The preoperative main curve was the largest in the HT group. ACPS group had the smallest residual curve (19° ± 8.9°) and apical vertebral translation (12.0 ± 9.0 mm) at the latest follow-up, followed by the HT group (30° ± 17.4°, 22.1 ± 13.4 mm) and TDGR group (30° ± 13.2°, 32.8 ± 17.1 mm). ACPS group had the largest T1–12 height and T1–S1 height after index surgery. Complications and revisions in the ACTs groups was lower than the TDGR group. Scoliosis Research Society-22 self-image questionnaire was superior in the ACPS group. Conclusion: According to our intermediate results, TDGR+ACTs could improve correction ability of apex deformity. ACTs had little deleterious effects on spinal height during the lengthening procedures, with a lower complication rate than TDGR. TDGR+ACTs might be a supplemental option for suitable EOS patients.

Sodium salt effect on hydrothermal carbonization of biomass: a catalyst for carbon-based nanostructured materials for lithium-ion battery applications

Ming, Jun,Wu, Yingqiang,Liang, Guanfeng,Park, Jin-Bum,Zhao, Fengyu,Sun, Yang-Kook The Royal Society of Chemistry 2013 Green chemistry Vol.15 No.10

<P>The salt effect of Na<SUB><I>x</I></SUB>A (A = SO<SUB>4</SUB><SUP>2−</SUP>, Cl<SUP>−</SUP>, NO<SUB>3</SUB><SUP>−</SUP>, <I>etc</I>.) on the hydrothermal carbonization of biomass is reported. It is a new catalyst and recyclable template to more simply and effectively prepare carbon-based materials, such as porous carbon-coated anode materials (<I>e.g.</I>, Fe<SUB>3</SUB>O<SUB>4</SUB>@porous-C) in lithium-ion battery applications with enhanced performance.</P> <P>Graphic Abstract</P><P>The sodium salt effect on hydrothermal carbonization of biomass and as a catalyst for carbon-based nanostructured materials for lithium-ion battery applications is reported. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3gc40480c'> </P>

Lowest Instrumented Vertebra at L3 Versus L4 in Posterior Fusion for Moderate Lenke 5C Type Adolescent Idiopathic Scoliosis: A Case-Match Radiological Study

Zhiyi Li,You Du,Yiwei Zhao,Guanfeng Lin,Haoran Zhang,Chenkai Li,Xiaohan Ye,Yang Yang,Shengru Wang,Jianguo Zhang 대한척추신경외과학회 2023 Neurospine Vol.20 No.4

Objective: To compare the radiological outcomes in Lenke 5C type patients whose lowest instrumented vertebra (LIV) was L3 or L4 in a case-match study. Methods: We conducted a retrospective case-match study and included 82 patients in the study. Radiological results before surgery, after surgery, and at last follow-up were recorded and analyzed in the L3 and L4 groups. Results: After matching the age, Risser’s sign, sex, and main Cobb, 41 pairs of patients were enrolled in our study. The total fusion segments in the L3 group (median [interquartile range]: 5.0 [6.0–5.0]) were shorter than those in the L4 group (6.0 [6.5–6.0]). The main curve was significantly corrected after surgery in both groups, and was comparable at the last followup between groups. In addition, according to the results of Fisher precision probability test, there was no significant difference of coronal or sagittal imbalance between the 2 groups at the 2-year follow-up. Conclusion: The correction in coronal and sagittal planes in L3 group and L4 group remains similar. On account of more motion segments, L3 could be an ideal choice as LIV in moderate Lenke 5C type AIS. Long-term follow-up is needed to evaluate the effect of larger compensatory lumbar-sacral curve when stopping at L3.

Outcomes of Posterior Lumbar Hemivertebra Resection and Short Fusion in Patients With Severe Sacral Tilt

Shengru Wang,Jianguo Zhang,Yanbin Zhang,You Du,Yang Yang,Guanfeng Lin 대한척추신경외과학회 2021 Neurospine Vol.18 No.3

Objective: To introduce surgical strategies to restore coronal balance during limited fusion for early lumbar hemivertebra resection in patients with severe sacral tilt. Methods: Sacral tilt was defined as a sacral tilt angle ≥5, and severe sacral tilt was defined as a sacral tilt angle >10. From July 2004 to December 2017, 73 consecutive patients treated with posterior hemivertebra resection and short fusion in our institution were evaluated. Severe sacral tilt was noted in 26 patients (14 boys and 12 girls), and all were enrolled in this study. Undercorrection of the primary lumbar curve as compensation for the sacral tilt and short fusion was performed in these patients. The medical charts and imaging data of the patients were retrospectively reviewed to evaluate the outcomes. Results: All patients were followed for at least 2 years. The mean age at the time of surgery was 3.7 (2–9) years old, with a total of 31 lumbar hemivertebra excised. On average, 2.8 (2–5) segments were fused for each patient. Sacral tilt minimally improved from 14.5° preoperatively to 13.6° postoperatively (p=0.15) and remained stable at the follow-up. The overall lumbar curve was 41.9° preoperatively, 11.7° immediately postoperatively, and 14.6° at the final follow-up. The segmental scoliosis curve was 39.1° preoperatively, 9.7° immediately postoperatively, and 11.2° at the final follow-up. Segmental kyphosis was corrected from 27.2° to 6.5° after the surgery and was 7.1° at the latest follow-up. Conclusion: Sacral tilt is seen in patients with congenital scoliosis in lumbar hemivertebra. Undercorrection of the lumbar curve and segmental scoliosis to compensate for sacral tilt and short fusion after hemivertebra resection may be helpful to restore coronal balance and preserve mobility in segments in patients with pronounced severe sacral tilt.

Analysis on the influence of type and proportion of aggregates on the performance of PU based polymer concrete

Zhuoyuan Chen,Jianbo Zhao,Peiyang Li,Aizhong Qin,Zhihua Gao,Wenfen Zhao,Shaocan Wang,Guanfeng Lia 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.1

In this work, the fabrication and improvement of a lightweight and corrosion-resistant polyurethane (PU) based polymerconcrete are studied. The aggregate in traditional polymer concrete is generally crushed stone. Due to the low bonding strengthbetween polymer matrix and crushed stone, it is easy to fall off between polymer matrix and crushed stone after long-termuse, resulting in the degradation of the performance of polymer concrete. In order to overcome the low bond strength betweencrushed stone and polymer matrix in polymer concrete, modified polyetheramine particles were used to enhance the finalmechanical parameters of PU based polymer concrete. A series of mechanical and environmental tests were carried out, andthe effects of aggregates addition ratio and type on the mechanical properties of polymer concrete were analyzed. Theexperimental results determined the influence mechanism of aggregates proportion and type on the mechanical properties ofpolymer concrete, and obtained the appropriate aggregates type and addition proportion. The current work reveals that usingmodified polyetheramine particles as aggregates of polymer concrete can significantly enhance the bond strength anddurability between polymer matrix and aggregates. The density of this polymer concrete proposed in this paper is about 1.2g/mm3; The density of traditional polymer concrete is about 1.5-1.8 g/mm3, the weight can be reduced by 25%, and there isno problem of falling off between polymer matrix and aggregate.