Compressive strength prediction of CFRP confined concrete using data mining techniques

Aires Camões,Francisco F. Martins 사단법인 한국계산역학회 2017 Computers and Concrete, An International Journal Vol.19 No.3

During the last two decades, CFRP have been extensively used for repair and rehabilitation of existing structures as well as in new construction applications. For rehabilitation purposes CFRP are currently used to increase the load and the energy absorption capacities and also the shear strength of concrete columns. Thus, the effect of CFRP confinement on the strength and deformation capacity of concrete columns has been extensively studied. However, the majority of such studies consider empirical relationships based on correlation analysis due to the fact that until today there is no general law describing such a hugely complex phenomenon. Moreover, these studies have been focused on the performance of circular cross section columns and the data available for square or rectangular cross sections are still scarce. Therefore, the existing relationships may not be sufficiently accurate to provide satisfactory results. That is why intelligent models with the ability to learn from examples can and must be tested, trying to evaluate their accuracy for composite compressive strength prediction. In this study the forecasting of wrapped CFRP confined concrete strength was carried out using different Data Mining techniques to predict CFRP confined concrete compressive strength taking into account the specimens’ cross section: circular or rectangular. Based on the results obtained, CFRP confined concrete compressive strength can be accurately predicted for circular cross sections using SVM with five and six input parameters without spending too much time. The results for rectangular sections were not as good as those obtained for circular sections. It seems that the prediction can only be obtained with reasonable accuracy for certain values of the lateral confinement coefficient due to less efficiency of lateral confinement for rectangular cross sections.

Heterogeneity and genetic variations of serotypes O and Asia 1 foot-and-mouth disease viruses isolated in Vietnam

Le, Van Phan,Nguyen, Tung,Park, Jong-Hyeon,Kim, Su-Mi,Ko, Young-Joon,Lee, Hyang-Sim,Nguyen, Van Cam,Mai, Thuy Duong,Do, Thi Hoa,Cho, In-Soo,Lee, Kwang-Nyeong Elsevier 2010 Veterinary microbiology Vol.145 No.3

<P><B>Abstract</B></P><P>Six field foot-and-mouth disease viruses (FMDVs), including four serotype O and two serotype Asia 1 strains, were collected from endemic outbreaks in 2005, 2006, and 2007 from four different provinces in Vietnam. The viruses were isolated and genetically characterized for their complete genomic sequences. The genetic analysis based on the complete genomic coding sequences revealed that the four serotype O FMDVs were related to each other, sharing 95.2% nucleotide (nt) identity and 97.5–97.6% amino acid (aa) identity. Genetic analysis and a phylogenetic tree, based on the VP1 gene of FMDV, showed that the four present Vietnamese serotype O strains have a high level of identity with other serotype O representatives of the Mya-98 lineage of the Southeast Asian (SEA) topotype. The four viruses were all clustered into the Mya-98 lineage of the SEA topotype, sharing 92.3–95.6% nt and 93.4–96.7% aa identity. This finding of the Mya-98 lineage was different from previous reports that the Vietnamese serotype O strains belonged to the Cam-94 lineage of the SEA topotype and two other topotypes, Middle East-South Asia (ME-SA) and Cathay. For the two serotype Asia 1 FMDVs, the genetic analysis based on the complete genomic coding sequences as well as on the VP1 gene revealed that they belonged to two genogroups, IV and V. Of note, the As1/VN/QT03/2007 strain of genogroup V, isolated in 2007, was very closely related to the pandemic Asia 1 strain which caused FMD outbreaks in China (Asia1/WHN/CHA/06, FJ906802) and Mongolia (Asia1/MOG/05, EF614458) in 2005, sharing 99.0–99.3% nt and 99.5–100% aa identity. In contrast, the second strain As1/VN/LC04/2005 of genogroup IV, isolated in 2005, was closely related to all referenced Vietnamese serotype Asia 1 strains found in the GenBank databases, sharing 86.4–100% nt and 90.9–100% aa identity with each. This study is the first description of the full-length genomic sequence of Vietnamese FMDV serotypes O and Asia 1 and may provide the evidence of the concurrent circulation of different serotypes and subtypes of FMDV in recent years in Vietnam.</P>

Special Theme 2: Asian and European Economic Integration at a Crossroads

Peter Claeys,Helena Sanz-Morales,Camé,lia Turcu 세종대학교 경제통합연구소 2021 Journal of Economic Integration Vol.36 No.1

High-Rate Vfas Valorization From Food Waste Using Carbon-Based Conductive Materials

Thi Cam Tien Nguyen(NGUYEN THI CAM TIEN),Seoktae Kang(강석태),Seungyeob Han(한승엽),Hyungseugn Hahm(함형승),Kanokporn Intang 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11

An Approach of Cephalometric Landmarks Localization For Odonto-Stomatology Orthopedics

Cam-Hao Hua,Sungyoung Lee(이승룡) 한국정보과학회 2016 한국정보과학회 학술발표논문집 Vol.2016 No.12

Trend analysis of process quality indicators for the Korean National Cervical Cancer Screening Program from 2005 to 2013

Cam Nhung Bui,최은지,서미나,전재관,정규원,임명철,최귀선 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.1

Objective: This study sought to examine changes in trends for quality indicators of thepopulation-based Korean National Cancer Screening Program (KNCSP) for cervical cancerfrom years 2005 to 2013. Methods: Our study data were derived from the KNCSP database. Cervical cancer diagnosisinformation was ascertained through linkage with the Korean National Cancer Registry andthe KNCSP database. Performance measures for cervical cancer screening were estimated,including participation rate, positive rate, crude detection rate (CDR), interval cancer rate(ICR), positive predictive value (PPV), sensitivity, and specificity. Joinpoint analysis wasapplied to calculate annual percentage changes (APCs) in all indicators according to socio demographic factors. Results: A significant increasing trend was noted in participation rates (APC=13.4%; 95%confidence interval [CI]=10.5, 16.4). PPV and specificity increased from years 2005 to 2009and remained stable till 2013. An increasing trend was discovered in CDRs for cervicalcancer in situ (APC=3.9%; 95% CI=1.0, 6.9), whereas a decreasing trend was observed inICRs for invasive cervical cancer (APC=−2.5%; 95% CI=−4.5, −0.5). Medical Aid recipientsand women older than 70 years showed the lowest participation rates, but higher CDRs andICRs, compared to other groups. In general, most of the quality indicators for cervical cancerscreening improved from 2005 to 2009 and remained stable to 2013. Conclusion: The KNCSP for cervical cancer in Korea has improved in terms of participationrate and accuracy of the screening test. These results may be attributed to the NationalQuality Improvement Program for KNCSP.

Intentions to Undergo Lung Cancer Screening among Korean Men

Cam, Nhung Bui,Lee, Yoon Young,Yoon, HyoJoong,Suh, Mina,Park, Boyoung,Jun, Jae Kwan,Kim, Yeol,Choi, Kui Son Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.15

Opportunistic screening for lung cancer is commonly conducted in Korea in accordance with physician recommendations and screenee's preferences. However, studies have yet to thoroughly examine the public's understanding of the risks posed by lung cancer screening. This study was conducted to assess changes in intentions to undergo lung cancer screening in response to being informed about exposure to radiation during low-dose computed tomography (LDCT) tests and to identify factors with the greatest influence thereon among Korean men. We conducted sub-group interviews among men chosen from the 2013 Korea National Cancer Screening Survey (KNCSS), a nationwide, population-based, cross-sectional survey of men aged 40 to 74 years and women aged 30 to 74 years. From 4100 participants in the KNCSS, 414 men who underwent any cancer screening test within the last 2 years were randomly selected for inclusion in this study. Via face-to-face interviews, their intentions to undergo lung cancer screening were assessed before and after being informed about exposure to radiation during LDCT testing. Of the 414 participants, 50% were current smokers. After receiving information on the benefits of the test, 95.1% stated an intention to undergo screening; this decreased to 81.6% after they received information on the harms of the test. The average decrease in intention rate was 35.3%. Smoking status, household income, and education level were not associated with lowered intentions to undergo lung cancer screening. Participants who were older than 60 years old (OR=0.56; 95% CI= 0.33-0.96) and those with less concern for radiation exposure (OR=0.56; 95% CI=0.36-0.89) were less likely to lower their screening intentions. The results of this study suggest that there is a need to educate both non-smokers and former smokers on the harms of lung cancer screening.

Iso-layered Sodium Managanese Sulfides Aerogel Formation by Transition Metal Coordination Transformation for Radionuclides Remediation

Cam Thanh Duy Ha,Myung-Gil Kim 한국고분자학회 2022 한국고분자학회 학술대회 연구논문 초록집 Vol.47 No.1

Shearing Pregnant Ewes to Improve Lamb Birth Weight Increases Milk Yield of Ewes and Lamb Weaning Weight

Cam, M.A.,Kuran, M. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.12

Milk yield, lamb birth weight and weaning weight responses to shearing during winter in sheep were investigated. A total of 46 Karayaka ewes were allocated into two treatment groups. Pregnant ewes in one group were shorn on day 100 of gestation (Shorn, n=24) and the remaining ewes were left unshorn to serve as controls (Unshorn, n=22). The ewes were maintained on pasture during the day and housed in the evenings. Lamb birth weight, weaning weight and ewes'' daily milk yield in fifteen dayintervals until weaning (75 days) were recorded. Shearing ewes on day 100 of pregnancy increased gestation length (p<0.01) compared to unshorn ewes (147.8${\pm}$0.45 vs. 145.9${\pm}$0.42 days). Birth weights of lambs from shorn ewes on day 100 of their pregnancy were higher (p<0.01) than those from unshorn ewes (3.7${\pm}$0.11 vs. 3.2${\pm}$0.07 kg). Shearing pregnant ewes increased (p<0.05) the lamb weaning weight at day 75 post-lambing (23.6${\pm}$1.10 vs. 19.5${\pm}$0.91). It also increased milk yield (p<0.05). Milk yields on day 75 of lactation were 302${\pm}$33 and 425${\pm}$25 g per day for unshorn and shorn ewes on day 100 of pregnancy, respectively. Lamb survival at weaning was higher (p<0.05) in lambs from shorn ewes compared to those from unshorn ewes. In conclusion, shearing pregnant ewes in winter months enhanced milk yield, lamb birth weight, lamb weaning weight and lamb survival. It is suggested that increasing both lamb birth weight and subsequent milk yield of dams by shearing ewes on day 100 of pregnancy during winter may improve postnatal lamb viability.

Effect of Pap smear screening on cervical cancer stage at diagnosis: results from the Korean National Cancer Screening Program

Cam Nhung Bui,Seri Hong,서미나,전재관,정규원,임명철,최귀선 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.5

Objective: We aimed to determine the differences in stage at diagnosis of cervical cancer among Korean women according to screening history. Methods: Using linkage data from the Korean Central Cancer Registry and Korean National Cancer Screening Program (KNCSP), we included 18,388 women older than 30 years who were newly diagnosed with cervical cancer between 2013 and 2014 and examined their screening history. Between individuals, age group and socioeconomic status were matched to control for potential confounders. Results: Significantly more cases of carcinoma in situ (CIS) were diagnosed in the ever- screened (71.77%) group than in the never-screened group (54.78%), while localized, regional, distant, and unknown stage were more frequent in the never-screened group. Women in the ever-screened group were most likely to be diagnosed with CIS than with invasive cervical cancer (adjusted odds ratio [aOR]=2.40; 95% confidence interval [CI]=2.18– 2.65). The aOR for being diagnosed with CIS was highest among women who were screened 3 times or more (aOR=5.10; 95% CI=4.03–6.45). The ORs were highest for women screened within 24 months of diagnosis and tended to decrease with an increasing time since last screening (p-trend <0.01). Conclusion: The KNCSP for cervical cancer was found to be positively associated with diagnosis of cervical cancers at earlier stages among women aged 30 years or older. The benefit of screening according to time was highest for women screened within 24 months of diagnosis.