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Machine Learning and Synthetic Minority Oversampling Techniques for Imbalanced Data: Improving Machine Failure Prediction

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Computers, Materials & Continua 2023年第6期75卷 4821-4841页

作者： yap bee wah Azlan Ismail Nur Niswah Naslina Azid Jafreezal Jaafar Izzatdin Abdul Aziz Mohd Hilmi Hasan Jasni Mohamad Zain Institute for Big Data Analytics and Artificial Intelligence(IBDAAI) Kompleks Al-KhawarizmiUniversiti Teknologi MARA(UiTM)Shah Alam40450SelangorMalaysia School of Computing Sciences College of ComputingInformatics and MediaUniversiti Teknologi MARA(UiTM)40450Shah AlamSelangorMalaysia Mathematical Sciences Studies College of ComputingInformatics and MediaUniversiti Teknologi MARA(UiTM)Kelantan BranchMachang CampusBukit Ilmu18500MachangKelantan Darul NaimMalaysia Centre for Research in Data Science(CeRDaS) Department of Computer and Information Sciences(DCIS)Universiti Teknologi PETRONAS(UTP)Seri Iskandar32610PerakMalaysia UNITAR International University Jalan SS6/3SS6Petaling Jaya47301SelangorMalaysia

Prediction of machine failure is challenging as the dataset is often imbalanced with a low failure *** common approach to han-dle classification involving imbalanced data is to balance the data using a sampling approach such as random undersampling,random oversampling,or Synthetic Minority Oversampling Technique(SMOTE)*** paper compared the classification performance of three popular classifiers(Logistic Regression,Gaussian Naïve Bayes,and Support Vector Machine)in predicting machine failure in the Oil and Gas *** original machine failure dataset consists of 20,473 hourly data and is imbalanced with 19945(97%)‘non-failure’and 528(3%)‘failure data’.The three independent variables to predict machine failure were pressure indicator,flow indicator,and level *** accuracy of the classifiers is very high and close to 100%,but the sensitivity of all classifiers using the original dataset was close to *** performance of the three classifiers was then evaluated for data with different imbalance rates(10%to 50%)generated from the original data using SMOTE,SMOTE-Support Vector Machine(SMOTE-SVM)and SMOTE-Edited Nearest Neighbour(SMOTE-ENN).The classifiers were evaluated based on improvement in sensitivity and *** showed that the sensitivity of all classifiers increases as the imbalance rate *** with radial basis function(RBF)kernel has the highest sensitivity when data is balanced(50:50)using SMOTE(Sensitivitytest=0.5686,Ftest=0.6927)compared to Naïve Bayes(Sensitivitytest=0.4033,Ftest=0.6218)and Logistic Regression(Sensitivitytest=0.4194,Ftest=0.621).Overall,the Gaussian Naïve Bayes model consistently improves sensitivity and F-measure as the imbalance ratio increases,but the sensitivity is below 50%.The classifiers performed better when data was balanced using SMOTE-SVM compared to SMOTE and SMOTE-ENN.

关键词： Machine failure machine learning imbalanced data SMOTE classification

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Prevalence and risk factors for impaired renal function among Asian patients with nonalcoholic fatty liver disease

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Hepatobiliary & Pancreatic Diseases International 2024年第3期23卷 241-248页

作者： Chao Sun George Boon-bee Goh Wan-Cheng Chow wah-Kheong Chan Grace Lai-Hung Wong Wai-Kay Seto Yi-Hsiang Huang Han-Chieh Lin I-Cheng Lee Hye Won Lee Seung Up Kim Vincent Wai-Sun Wong Jian-Gao Fan Center for Fatty Liver Disease Department of GastroenterologyXinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai Key Lab of Pediatric Gastroenterology and NutritionShanghai 200092China Department of Gastroenterology&Hepatology Singapore General HospitalSingaporeSingapore Gastroenterology and Hepatology Unit Department of MedicineFaculty of MedicineUniversity of MalayaKuala LumpurMalaysia Department of Medicine and Therapeutics and State Key Laboratory of Digestive Disease The Chinese University of Hong KongHong KongChina Department of Medicine The University of Hong KongHong KongChina Institute of Clinical Medicine National Yang Ming Chiao Tung University School of MedicineTaipeiTaiwanChina Division of Gastroenterology and Hepatology Taipei Veterans General HospitalTaipeiTaiwanChina Faculty of Medicine National Yang Ming Chiao Tung University School of MedicineTaipeiTaiwanChina Department of Internal Medicine Yonsei University College of MedicineSeoulKorea

Background:Nonalcoholic fatty liver disease(NAFLD)is associated with impaired renal function,and both diseases often occur alongside other metabolic ***,the prevalence and risk factors for impaired renal function in patients with NAFLD remain *** objective of this study was to identify the prevalence and risk factors for renal impairment in NAFLD ***:All adults aged 18-70 years with ultrasound-diagnosed NAFLD and transient elastography examination from eight Asian centers were enrolled in this prospective *** fibrosis and cirrhosis were assessed by FibroScan-aspartate aminotransferase(FAST),Agile 3+and Agile 4 *** renal function and chronic kidney disease(CKD)were defined by an estimated glomerular filtration rate(eGFR)with value of<90 mL/min/1.73 m^(2) and<60 mL/min/1.73 m^(2),respectively,as estimated by the CKD-Epidemiology Collaboration(CKD-EPI)***:Among 529 included NAFLD patients,the prevalence rates of impaired renal function and CKD were 37.4%and 4.9%,*** multivariate analysis,a moderate-high risk of advanced liver fibrosis and cirrhosis according to Agile 3+and Agile 4 scores were independent risk factors for CKD(P<0.05).Furthermore,increased fasting plasma glucose(FPG)and blood pressure were significantly associated with impaired renal function after controlling for the other components of metabolic syndrome(P<0.05).Compared with patients with normoglycemia,those with prediabetes[FPG≥5.6 mmol/L or hemoglobin A1c(HbA1c)≥5.7%]were more likely to have impaired renal function(P<0.05).Conclusions:Agile 3+and Agile 4 are reliable for identifying NAFLD patients with high risk of *** glycemic control in the prediabetic stage might have a potential renoprotective role in these patients.

关键词： Nonalcoholic fatty liver disease Impaired renal function Agile 3+ Agile 4 Metabolic syndrome

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Effect of Microwave Power and Clamping Pressure on the Microwave Welding of Polypropylene Using Silicon Carbide Nanowhiskers as Microwave Susceptor

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Chinese Journal of Polymer Science 2022年第11期40卷 1466-1481页

作者： Phey Yee Foong Chun Hong Voon bee Ying Lim Pei Leng Teh Mohd Afendi Bin Rojan Nor Azizah Parmin Subash C.B.Gopinath Mohd Khairuddin Md Arshad Foo wah Low Savisha Mahalingam Abreeza Manap Ruslinda A.Rahim Uda Hashim Institute of Nano Electronic Engineering Universiti Malaysia PerlisSeriabKangarPerlis01000Malaysia Faculty of Chemical Engineering Technology Universiti Malaysia PerlisJejawiPerlis Arau02600Malaysia Faculty of Mechanical Engineering Technology Universiti Malaysia PerlisPauhPerlis Arau02600Malaysia Department of Electrical&Electronic Engineering Lee Kong Chian Faculty of Engineering&ScienceUniversiti Tunku Abdul RahmanBandar Sungai LongKajangSelangor43000Malaysia Institute of Sustainable Energy Universiti Tenaga NasionalJalan IKRAM-UNITENKajangSelangor43000Malaysia

Due to their excellent dielectric properties and the rapid response to microwave irradiation,silicon carbide nanowhiskers(SiCNWs)were employed as microwave susceptor in this study to absorb microwave and locally melt the surrounding polypropylene(PP)substrates for the joining of PP *** welded joint is formed after the melted PP was cooled and *** than microwave susceptor,SiCNWs also acted as the nanofillers in strengthening the welded joint through the formation of SiCNWs reinforced PP nanocomposite at the interface of PP ***,the effect of microwave power on the microwave welding of PP substrates using SiCNWs as susceptor was studied and *** was found that the tensile strength and modulus of elasticity of the welded joint improved as microwave power ***,it deteriorates the flexibility of the welded joint as high stiffness SiCNWs were incorporated deeper into the PP matrix which restricted the PP chain *** from microwave power,clamping pressure is also critical in determining the mechanical properties of a welded *** compared to unclamped welded joint,the tensile strength,modulus of elasticity and flexibility of welded joint subjected to clamping pressure improved ***,the tensile strength of welded joint increased when the clamping pressure was increased from P1 to P3,but decreased when the clamping pressure was further increased to P4 due to the occurrence of flashing at welded *** formation mechanism of SiCNWs reinforced PP welded joint was also proposed in this *** to conventional welding,this welding process is easy,straightforward and is able to produce welded joint with outstanding mechanical properties via precise controlling of the processing ***,microwave welding is thought to offer an option for the joining of thermoplastics and other applications.

关键词： Microwave welding Silicon carbide Nanowhiskers Joining Susceptor

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Gamma-glutamyl transferase and cardiovascular risk in nonalcoholic fatty liver disease:The Gut and Obesity Asia initiative

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World Journal of Gastroenterology 2020年第19期26卷 2416-2426页

作者： Panyavee Pitisuttithum wah-Kheong Chan George Boon-bee Goh Jian-Gao Fan Myeong Jun Song Phunchai Charatcharoenwitthaya Ajay Duseja Yock-Young Dan Kento Imajo Atsushi Nakajima Khek-Yu Ho Khean-Lee Goh Vincent Wai-Sun Wong Sombat Treeprasertsuk Department of Medicine Faculty of MedicineChulalongkorn UniversityBangkok 10330Thailand Department of Medicine University of MalayaKuala Lumpur 50603Malaysia Department of Gastroenterology&Hepatology Singapore General HospitalSingapore 169608Singapore Department of Gastroenterology Shanghai Jiao Tong University School of MedicineShanghai 200092China Department of Internal Medicine The Catholic University of KoreaDaejeon 301-723South Korea Division of Gastroenterology Faculty of Medicine Siriraj HospitalMahidol UniversityBangkok 10700Thailand Department of Hepatology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Medicine National University of Singapore 119228Singapore Department of Gastroenterology and Hepatology Yokohama City University Graduate School of MedicineYokohama 236-0004Japan Department of Medicine and Therapeutics The Chinese University of Hong KongHong Kong 999077China

BACKGROUND Gamma-glutamyl transferase(GGT)is associated with the risk of cardiovascular disease(CVD)in the general *** To identify the association of baseline GGT level and QRISK2 score among patients with biopsy-proven nonalcoholic fatty liver disease(NAFLD).METHODS This was a retrospective study involving 1535 biopsy-proven NAFLD patients from 10 Asian centers in 8 countries using data collected by the Gut and Obesity in Asia(referred to as“GO ASIA”)*** patients with available baseline GGT levels and all 16 variables for the QRISK2 calculation(QRISK2-2017;developed by researchers at the United Kingdom National Health Service;https://***/2017/;10-year cardiovascular risk estimation)were included and compared to healthy controls with the same age,sex,and *** risk was ***2 score>10%was defined as the high-CVD-risk *** stages 3 and 4(F3 and F4)were considered advanced *** A total of 1122 patients(73%)had complete data and were included in the final analysis;314(28%)had advanced *** median age(interquartile range[IQR])of the study population was 53(44-60)years,532(47.4%)were females,and 492(43.9%)were of Chinese *** median 10-year CVD risk(IQR)was 5.9%(2.6-10.9),and the median relative risk of CVD over 10 years(IQR)was 1.65(1.13-2.2)compared to healthy individuals with the same age,sex,and *** high-CVD-risk group was significantly older than the low-risk group(median[IQR]:63[59-67]vs 49[41-55]years;P<0.001).Higher fibrosis stages in biopsy-proven NAFLD patients brought a significantly higher CVD risk(P<0.001).Median GGT level was not different between the two groups(GGT[U/L]:Median[IQR],high risk 60[37-113]vs low risk 66[38-103],P=0.56).There was no correlation between baseline GGT level and 10-year CVD risk based on the QRISK2 score(r=0.02).CONCLUSION The CVD risk of NAFLD patients is higher than that of healthy *** GGT level cannot predict CVD ri

关键词： Nonalcoholic fatty liver disease Gamma glutamyl transferase QRISK Cardiovascular risk Gut and Obesity in Asia

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新加坡最大回用水处理厂污水短程硝化厌氧氨氧化脱氮工艺

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北京工业大学学报 2015年第10期41卷 1441-1454页

作者： Cao Yeshi Kwok bee Hong Yan Zhou Yu Liu He Jianzhong Chua Seng Chye wah Yuen Long Yahya Ghani Water Reclamation(Plants) Department PUB Advanced Environmental Biotechnology Centre(AEBC) Nanyang Environment & Water Research InstituteNanyang Technological University Civil and Environment Division National University of Singapore

总结了新加坡樟宜回用水处理厂4次采样的结果,该厂日处理城市污水80万t.在好氧区很好地实现了部分硝化和亚硝酸盐积累,其中好氧氨氧化率平均为72.2%,亚硝酸盐积累率平均为76.0%.在缺氧区氨氮和亚硝酸盐得到了同步去除(厌氧氨氧化).物料... 详细信息

总结了新加坡樟宜回用水处理厂4次采样的结果,该厂日处理城市污水80万t.在好氧区很好地实现了部分硝化和亚硝酸盐积累,其中好氧氨氧化率平均为72.2%,亚硝酸盐积累率平均为76.0%.在缺氧区氨氮和亚硝酸盐得到了同步去除(厌氧氨氧化).物料衡算结果表明:初沉池的出水总氮的37.5%是通过自养脱氮去除,27.1%是通过传统的硝化/反硝化脱氮去除,其余部分总氮则存在于活性污泥和出水中.微生物和动力学研究表明:短悬浮或游离的厌氧氨氧化菌可存在于污泥龄较短的污水处理系统.最后从出水氮质量浓度、pH、碱度、曝气能耗及反应器容积等方面,将樟宜回用水处理厂的分段进水活性污泥法工艺与新加坡其他3个回用水处理厂的MEL/LE工艺进行了对比分析.

关键词：污水自养脱氮处理厌氧氨氧化亚硝酸盐积累自养脱氮城市污水处理温带气候

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婴儿常见胃肠道症状的实用处理法则(三)

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临床儿科杂志 2013年第9期31卷 898-900页

作者： Yvan Vandenplas Pedro Gutierrez-Castrellon Carlos Velasco-Benitez Jorge Palacios Domingo Jaen Hugo Ribeiro Lynette Pei-Chi Shek bee-wah Lee Pedro Alarcon 布鲁塞尔自由大学国家围生期学研究中心瓦莱大学圣卡洛斯大学委内瑞拉中央大学巴伊亚联邦大学研究中心新加坡国立大学雅培营养

1牛奶蛋白过敏症（CMPA）尽管缺乏系统的流行病学研究，但已知牛奶是全球婴幼儿及低龄儿童食物过敏的最常见原因之一。CMPA通常表现为胃肠道功能障碍，如呕吐和腹泻。明确诊断对于治疗的选择非常关键，因为避免摄入CMP可消除相关症状，... 详细信息

1牛奶蛋白过敏症（CMPA）尽管缺乏系统的流行病学研究，但已知牛奶是全球婴幼儿及低龄儿童食物过敏的最常见原因之一。CMPA通常表现为胃肠道功能障碍，如呕吐和腹泻。明确诊断对于治疗的选择非常关键，因为避免摄入CMP可消除相关症状，而不必要的饮食限制和禁忌则可导致婴儿生长发育受到影响或出现营养不良。1．

关键词：婴儿生长发育胃肠道症状胃肠道功能障碍用处蛋白过敏症流行病学食物过敏低龄儿童

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婴儿常见胃肠道症状的实用处理法则(一)

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临床儿科杂志 2013年第7期31卷 697-700页

在婴儿,特别是配方奶喂养的婴儿中功能性胃肠道（GI）症状较为常见[1]。应对这一问题,儿科医师常采用更换配方奶的方式来处理。由于治疗婴儿功能性GI症状的双盲的、安慰剂对照的、前瞻性干预的试验非常有限,本文在世界各地儿童胃肠病专... 详细信息

在婴儿,特别是配方奶喂养的婴儿中功能性胃肠道（GI）症状较为常见[1]。应对这一问题,儿科医师常采用更换配方奶的方式来处理。由于治疗婴儿功能性GI症状的双盲的、安慰剂对照的、前瞻性干预的试验非常有限,本文在世界各地儿童胃肠病专科医师和过敏症专科医师一致意见的基础上,制定了婴儿常见GI的实用处理法则,并具体介绍各种婴幼儿.

关键词：胃肠道症状婴儿用处配方奶喂养专科医师安慰剂对照儿科医师功能性

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婴儿常见胃肠道症状的实用处理法则(二)

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临床儿科杂志 2013年第8期31卷 797-800页

作者： Yvan Vandenplas Pedro Gutierrez-Castrellon Carlos Velasco-Benitez Jorge Palacios Domingo Jaen Hugo Ribeiro Lynette Pei-Chi Shek bee-wah Lee Pedro Alarcon 布鲁塞尔自由大学比利时布鲁塞尔国家围生期学研究中心墨西哥墨西哥城瓦莱大学哥伦比亚卡利圣卡洛斯大学危地马拉危地马拉城委内瑞拉中央大学委内瑞拉巴伊亚联邦大学研究中心巴西萨尔瓦多新加坡国立大学新加坡雅培营养美国俄亥俄州哥伦布

1烦躁、腹部胀气伴哭闹很多婴儿因为烦躁和腹部胀气而表现出痛苦的样子,但同时几乎所有这些婴儿都会经常哭闹,因而照护者更倾向于关注婴儿的哭闹而非其他症状或体征。因此,在这种情况下,完善病史信息非常关键。婴儿经常通过哭闹来沟通... 详细信息

1烦躁、腹部胀气伴哭闹很多婴儿因为烦躁和腹部胀气而表现出痛苦的样子,但同时几乎所有这些婴儿都会经常哭闹,因而照护者更倾向于关注婴儿的哭闹而非其他症状或体征。因此,在这种情况下,完善病史信息非常关键。婴儿经常通过哭闹来沟通和表达自己。而哭闹可有多种原因：饥饿或希望得到关注,或者出现了严重的威胁生命的疾病。健康婴儿从出生后不久便开始哭闹,每天20 min至3.5 h[1]。

关键词：健康婴儿胃肠道症状用处腹部胀气哭闹烦躁

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Distinctive serotypes of SARS-related coronaviruses defined by convalescent sera from unvaccinated individuals

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hLife 2023年第1期1卷 26-34页

作者： Chee wah Tan Feng Zhu Wan Ni Chia #Barnaby EYoung Aileen Ying Yan Yeoh Thomas Althaus Chee Fu Yung Wee Chee yap Beng Lee Lim Mark I-C Chen Jinyan Zhang Yun Yan Mah Eric Voiglio Alex Sigal Jianxin Huo Shengli Xu Yee Joo Tan Kong-Peng Lam David Lye Lin-Fa Wang Programme in Emerging Infectious Diseases Duke-NUS Medical SchoolSingapore National Center of Infectious Diseases Singapore Tan Tock Seng Hospital Singapore Lee Kong Chian School of Medicine Nanyang Technology UniversitySingapore Centre Scientifique de Monaco Monaco Direction de I’Action Sanitaire de Monaco Monaco Infectious Disease Service Department of PediatricsKK Women’s and Children’s HospitalSingapore Duke-NUS Medical School Singapore African Health Research Institute DurbanSouth Africa Singapore Immunology Network Agency for ScienceTechnology and ResearchSingapore Department of Physiology Yong Loo Lin School of MedicineNational University of SingaporeSingapore Department of Microbiology and Immunology Yong Loo Lin School of MedicineNational University of SingaporeSingapore Infectious Diseases Translational Research Programme National University of SingaporeSingapore 14School of Biological SciencesNanyang Technological UniversitySingapore Singhealth Duke-NUS Global Health Institute Singapore

Multiple Omicron sub-lineages have emerged,with Omicron XBB and XBB.1.5 subvariants becoming the dominant variants globally at the time of this *** key feature of new variants is their ability to escape humoral immunity despite the fact that there are limited genetic changes from their preceding *** raises the question of whether Omicron should be regarded as a separate serotype from viruses serologically clustered with the ancestral severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)***,we present cross-neutralization data based on a pseudovirus neutralization test using convalescent sera from naïve individuals who had recovered from primary infection by SARS-CoV-1 and SARS-CoV-2 strains/variants including the ancestral virus and variants Beta,Delta,Omicron BA.1,Omicron BA.2 and Omicron *** results revealed no significant cross-neutralization in any of the three-way testing for SARS-CoV-1,ancestral SARS-CoV-2 and SARS-CoV-2 Omicron *** data argue for the assignment of three distinct serotypes for the currently known human-infecting SARS-related coronaviruses.

关键词： SARS-CoV-2 SARS-CoV-1 serotype Omicron primary infection convalescent sera

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Study on the Experimental Marketing and Customer Intention of Design Hotel

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Journal of Tourism and Hospitality Management 2018年第6期6卷 304-317页

作者： Shirley Kuo Clarissa Nathania Ai-Lin Wang Wei-Ling Chen bee Mon yap Tunghai University Taiwan

In recent years, Taiwan’s design hotel is booming, local design hotel and international chain hotels have joined the Taiwan design hotels in the competition of the market, and the industry was actively building up its self-brand image. As currently there is no specific consensus and no enough space exploration of design hotel in Taiwan, the study thus considers attracting visitors to travel to design hotels as the main subject of concern. This study is based on this reason, the discussion by the consumer considering the design of the hotel imagery, it hopes to understand the customer’s feelings about designing a hotel by experiencing marketing, and tries to put forward the specific design concept of Taiwan Design Hotel in the future operation., and tempts to make Taiwan’s design hotel operate based on its designing concepts in the future. Besides the above motive, this study also has the following purposes:(1) to explore experimental marketing of design hotel;and (2) to explore the relationship between experimental marketing, customer value, and customer loyalty. Through the Schmitt (1999), the experimental marketing strategy module, which is based on the experimental marketing, is divided into five types: sensory experience, emotional experience, thinking experience, action experience and association experience. Customer value refers to the existing paper measurement factors compiled by existing papers, which are divided into functional, emotional, and symbolic value. The customer's intention is to organize the way for each scholar to measure the customer's loyalty, and to focus on the attitude, including repurchase, willingness to return and willingness to recommend. Based on the above definition, we designed our framework and assumptions and conducted research on the relationship between Experimental marketing, CV, and Customer loyalty using questionnaires and statistical analysis. The results of this study show that:(1) Experimental marketing, customer value, an

关键词： design hotel experimental marketing customer value customer loyalty

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