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Sukran Uygun,Hulya Aytar 한국전산응용수학회 2020 Journal of applied mathematics & informatics Vol.38 No.1
The study is about the bounds of the spectral norms of r-circulant and geometric circulant matrices with the sequences called biperiodic Jacobsthal numbers. Then we give bounds for the spectral norms of Kronecker and Hadamard products of these r-circulant matrices and geometric circulant matrices. The eigenvalues and determinant of r-circulant matrices with the bi-periodic Jacobsthal numbers are obtained.
UYGUN, SUKRAN,AYTAR, HULYA The Korean Society for Computational and Applied M 2020 Journal of applied mathematics & informatics Vol.38 No.1
The study is about the bounds of the spectral norms of r-circulant and geometric circulant matrices with the sequences called biperiodic Jacobsthal numbers. Then we give bounds for the spectral norms of Kronecker and Hadamard products of these r-circulant matrices and geometric circulant matrices. The eigenvalues and determinant of r-circulant matrices with the bi-periodic Jacobsthal numbers are obtained.
Ulger, Sukran,Kizilarslanoglu, Muhammet Cemal,Kilic, Mustafa Kemal,Kilic, Diclehan,Cetin, Bekir Eren,Ulger, Zekeriya,Karahacioglu, Eray Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Cancer prevalance and incidence is increasing with aging of populations and age is a critical factor in decision-making for anti-cancer treatment. However it is believed that chronological age is not enough to guide management in elderly cancer patients. Multidisciplinary evaluation and comprehensive geriatric assessment has gained importance regarding the treatment selection especially for definitive anti-cancer therapy recently. We here aimed to analyse the effect of the comprehensive geriatric assessment parameters on radiotherapy toxicity and tolerability in a series of geriatric cancer patients in Turkey.
Fracture toughness of glass-ceramics produced from power plant fly ash
A. Sukran Demirkiran 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.1
The fracture toughness of glass ceramics produced from the fly ash of the Seyitömer power plant of Turkey has been investigated using an indentation fracture technique. In this process, fly ash was melted and cast as a glass. The glass materials produced were heat treated at 1073 K, 1123 K and 1173 K for 30-240 minutes in order to obtain glass-ceramics. X-ray diffraction analysis (XRD) showed that the phases formed in the glass ceramics were diopsite and augite. Atomic force microscope (AFM) images were used for the examination of the surface structure of the glass ceramics. The fracture toughness of the glass ceramics ranged from 1.80 ± 0.15 MPa.m1/2 to 2.92 ± 0.65 MPa.m1/2 depending on the treatment temperature and time. The higher the crystallization temperature and the longer the treatment time, the higher the fracture toughness became
Knowledge Levels of Turkish Nurses Related to Prevention and Early Diagnosis of Cancer
Ozkahraman, Sukran,Yildirim, Belgin Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12
Background: The aim of this study was to examine knowledge about cancer and early diagnosis of cancer among nurses. Materials and Method: This descriptive study was carried out at a University Faculty of Medicine Hospital in Turkey. Study between April and June, 2011, with 325 volunteer nurses. The collection tool consisted of two survey forms. The first was designed for sociodemographic information and the second consisted of 16 questions, prepared in accordance with the literature as open and close-ended, for interviews conducted by researchers. Results: Out of the individuals (n=325), included in the study, 90.8% were female, 63.1% high school-university graduates and 55.1% married, with an average years of service of $6.34{\pm}5.33$ and an average age of $28.1{\pm}5.10$. The mean cancer knowledge point was $70.1{\pm}19.5$. Some 79.1% of nurses had not received cancer related continuing education by specialists. A signified relation was found between the nurse knowledge on cancer and educational level (p<0.05). Conclusions: The nurse, a member of the health staff, is in constant contact with individuals at hospitals, schools, polyclinics, workplaces, and homes. When educating society about cancer, nurses need to have a high level of knowledge regarding early diagnosis and cancer prevention.
미술관의 서비스품질이 서비스만족과 고객충성도에 미치는 영향
김석란(Kim, Sukran),정재우(Chung, Jaewoo) 한국서비스경영학회 2017 서비스경영학회지 Vol.18 No.3
In contemporary society, the art museum offers a variety of services such as education, leisure, and experience beyond the fundamental roles of preserving and exhibiting artworks. The purpose of this paper is to identify factors of service quality in an Art museum based on the combination of SERVPERF and HISTOQUAL dimensions. Furthermore, the paper examines the relationship among the service quality, customer satisfaction and customer loyalty using the identified factors of the service quality. The results reveal that the museum visitors’ perception could be best explained by three service quality dimensions named as Quality of exhibition, Access, and Empathy. Also customer satisfaction fully mediates the relationship between service quality and customer loyalty. Finally, in order to create added value beyond the fundamental roles, it is necessary to communicate with the visitors to make differentiation from other art museums based on the specificity of the Daegu area.
재방문율을 고려한 국공립 박물관·미술관의 운영효율성 분석
김석란(Kim, Sukran),정재우(Chung, Jaewoo) 한국서비스경영학회 2017 한국서비스경영학회 학술대회 Vol.2017 No.11
In the performance evaluation of museums and art museums, "return visit" is an important criterion in terms of creating added value of word of mouth effect. However, Previous studies, focus on deriving the correct operational performance the quantitative aspect of "number of visitors" and fail to reflect the more important qualitative aspect. The purpose of this study is to measure the operational efficiency of museums and art museums more comprehensively by establishing a performance model that adds "return visit rate" to performance indicators. The analysis using the more comprehensive model shows that the most ineffective museums achieved a relative performance of only 39.4%. Also the most efficient museum was analyzed to achieve 185.15% performance. It is expected that this study will help museums and art museums to make better decisions about resource input and output as well as establishment of operational strategy to accelerate the qualitative growth of museum.
김석란(Kim, Sukran),정재우(Chung, Jaewoo) 한국서비스경영학회 2017 서비스경영학회지 Vol.18 No.5
In the performance evaluation of museums and art museums, `return visit` is an important criterion in terms of creating added value from the word of mouth effect. However, previous studies, focus on the aspect of the operational performance, namely, `number of visitors`, and as a consequence, they failed to reflect on the most important aspects to make detailed strategy. The purpose of this study is to measure the operational efficiency of museums and art museums more comprehensively by establishing a performance model that adds `return visit rate` into performance indicators. The analysis using the newly proposed model by this paper shows that the most ineffective museums have achieved a relative performance of only 39.4%. Also the most efficient museum was analyzed to achieve as high as 185.15%. It is expected that this study will help museums and art museums to make better decisions on input resources for achieving better outputs as well as better establishment of operational strategy to accelerate the qualitative growth of the museums.
Murat Cakir,Sukran Senyuva,Sibel Kul,Elif Sag,Ali Cansu,Fulya Balaban Yucesan,Serap Ozer Yaman,Asim Orem 대한소아소화기영양학회 2019 Pediatric gastroenterology, hepatology & nutrition Vol.22 No.2
Purpose: Malnutrition may influence neurocognitive development in children by directly affecting the brain structural development, or indirectly by affecting the children's cognition experience. Malnutrition alters the cell numbers, cell migration, synaptogenesis, and neurotransmission due to inadequate availability of necessary micronutrients to support cell growth. We aimed to analyze neurocognitive development in infants with malnutrition and its association with long chain polyunsaturated fatty acids (LC-PUFA), micronutrients levels and magnetic resonance spectroscopy (MRS) findings. Methods: The study included two groups; group 1, infants with malnutrition (n=24), group 2; healthy infants (n=21). Peripheral blood was obtained from the participants for studying micronutrients and LC-PUFA levels. The neurocognitive development was analyzed by the use of an Ankara Developmental Screening Inventory test. MRS were performed on all infants. Results: All parameters of neurocognitive development and serum calcium (9.6±0.9 mg/dL vs. 10.4±0.3 mg/dL, p <0.05) and magnesium (2.02±0.27 mg/dL vs. 2.2±0.14 mg/dL, p <0.05) levels were noted as being low in infants with marked malnutrition. No difference was found in LC-PUFA levels between healthy and malnourished infants. Thalamic choline/creatine levels were significantly high in infants with malnutrition (1.33±0.22 vs. 1.18±0.22, p <0.05). Total neurocognitive development in infants was positively correlated with serum calcium levels ( p <0.05, r=0.381). Conclusion: Calcium supplementation may improve neurocognitive development in malnourished infants.
Turkish Social Attitudes towards to Cancer Prevention: a Health Belief Model Study
Tasci-Duran, Emel,Koc, Sukran,Korkmaz, Medet Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.18
This research was planned to reveal society's attitude towards cancer and early diagnosis using the health belief model. This study was planned as descriptive research in Isparta. A random sample of n=256 individuals of both genders was recruited at the largest shopping center. As a means of collection tool, a survey consisted of two forms, the first designed for sociodemographic information and the second covering 29 questions suitable for the content of Health Belief Model. Of the participants, 66.8% were female and 33.2% were male, and the average age was $33.3{\pm}11.0$ years. Some 46.1% partly thought that they may develop cancer, and 49.6% were afraid of this possibility. As many as 50% indicated that cancer is an issue that comes from Allah. A significant difference was found between not going for control unless feeling bad, and blood analysis for cancer screening (${\chi}^2=3.780$ p= 0.03). It was seen that in an area with a high rate of cancer, people's awareness of cancer prevention and early diagnosis and attitudes towards these are insufficient.