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- 저자 : Emre Ercan (검색결과 4 건)
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Ismail Konus,Ercan Ozsoy,Peykan Turkcuoglu,Sinan Emre,Fulya Duman 대한안과학회 2019 Korean Journal of Ophthalmology Vol.33 No.5
Purpose: To evaluate the effects of idiopathic infantile nystagmus (IN) and bilateral ametropic amblyopia on metabolitesin the occipital cortex by magnetic resonance spectroscopy. Methods: The children included in this prospective study were divided into three groups. Group 1 consisted of11 patients with idiopathic IN, group 2 consisted of 10 patients with bilateral ametropic amblyopia and group3 consisted of nine normal children. A single-voxel magnetic resonance spectroscopy examination was performedby placing a region of interest on the occipital cortex of each participant. N-acetyl aspartate (NAA),creatine (Cr) and choline (Cho) concentrations were measured in the occipital cortex. This was followed bycalculating and comparing the NAA/Cr and Cho/Cr ratios between the three groups. The Kruskal-Wallis test,Mann-Whitney U-test, and chi-square test were used for statistical analysis. Results: There was no statistically significant difference in NAA/Cr ratios between patients with idiopathic INand normal children, but there was a statistically significant difference between these groups when Cho/Crratios were compared; the ratio was higher in the idiopathic IN group. There were no statistically significant differencesin NAA/Cr or Cho/Cr ratios between patients with bilateral ametropic amblyopia and normal children. Conclusions: Our findings suggest that the neurochemical profile of the occipital cortex is partially affected byidiopathic IN, but not by bilateral ametropic amblyopia.
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Strengthening of reinforced concrete beams using external steel members
Ali Demir,Emre Ercan,Duygu Dönmez Demir 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.27 No.4
The objective of this study is to devise an alternative strengthening method to the ones available in the literature. So, external steel members were used to enhance both flexural and shear capacities of reinforced concrete (RC) beams having insufficient shear capacity. Two types of RC beams, one without stirrups and one with lacking stirrups, were prepared in the study. These beams were strengthened with external steel clamps devised by the authors and with external longitudinal reinforcements. Although the use of clamps alone didn’t have a significant effect on the load carrying capacity of the tested beams, the ductility increased approximately tenfold and the failure behavior changed from brittle to ductile. Although the use of clamps and longitudinal reinforcements together did not significantly increase the ductility of the beams, it approximately doubled their load capacities. The results of the experimental study were compared to the ones obtained from nonlinear finite element analysis (NLFEA) and it was observed that they were compatible. Finally, it can be concluded that the devised method could be applied to structural members as an alternative to methods in application due to lightness, low-cost, easy applicable and reliable.
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Effect of model calibration on seismic behaviour of a historical mosque
Ali Demir,Halil Nohutcu,Emre Ercan,Emin Hokelekli,Gokhan Altintas 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.60 No.5
The objective of the study is to investigate the effects of model calibration on seismic behaviour of a historical mosque which is one of the most significant Ottomon structures. Seismic analyses of calibrated and noncalibrated numeric models were carried out by using acceleration records of Kocaeli earthquake in 1999. In numerical analysis, existing crack zones on real structure was investigated in detail. As a result of analyses, maximum stresses and displacements of calibrated and noncalibrated numerical models were compared each other. Consequently, seismic behaviour and damage state of historical masonry Hafsa Sultan mosque was determined as more realistic in the event of a severe earthquake.
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Internalized Stigma in Pediatric Psoriasis: A Comparative Multicenter Study
( Erkan Alpsoy Mualla Polat ),( Ibrahim Halil Yavuz ),( Pelin Kartal ),( Didem Didar Balci ),( Ayse Serap Karadag ),( Asli Bilgic Ercan Arca ),( Bilge Fettahlioglu Karaman ),( Selma Emre ),( Esra Adis 대한피부과학회 2020 Annals of Dermatology Vol.32 No.3
Background: Internalized stigma, adoption of negative attitudes and stereotypes of the society regarding persons’ illness, has not been studied previously in pediatric psoriasis patients. Objective: We aimed to investigate the internalized stigma in pediatric psoriasis patients and to determine differences according to factors affecting internalized stigma compared to adult psoriasis patients. Methods: This multicenter, cross-sectional, comparative study included 125 pediatric (55 female, 70 male; mean age±standard deviation [SD], 14.59±2.87 years) and 1,235 adult psoriasis patients (577 female, 658 male; mean age±SD, 43.3±13.7 years). Psoriasis Internalized Stigma Scale (PISS), Dermatology Life Quality Index (DLQI), Perceived Health Status (PHS), and the General Health Questionnaire (GHQ)-12 were the scales used in the study. Results: The mean PISS was 58.48±14.9 in pediatric group. When PISS subscales of groups were compared, the pediatric group had significantly higher stigma resistance (p=0.01) whereas adult group had higher scores of alienation (p=0.01) and stereotype endorsement (p=0.04). There was a strong correlation between mean values of PISS and DLQI (r=0.423, p=0.001). High internalized stigma scores had no relation to either the severity or localization of disease in pediatric group. However, poor PHS (p=0.007) and low-income levels (p=0.03) in both groups, and body mass index (r=0.181, p=0.04) in the pediatric group were related to high PISS scores. Conclusion: Internalized stigma in pediatric patients is as high as adults and is related to poor quality of life, general health, and psychological illnesses. Unlike adults, internalized stigma was mainly determined by psoriasis per se, rather than disease severity or involvement of visible body parts, genitalia or folds. (Ann Dermatol 32(3) 181∼188, 2020)
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