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      • SCIESCOPUSKCI등재

        Interval finite element analysis of masonry-infilled walls

        Erdolen,,Ayse,Doran,,Bilge Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.44 No.1

        This paper strongly addresses to the problem of the mechanical systems in which parameters are uncertain and bounded. Interval calculation is used to find sharp bounds of the structural parameters for infilled frame system modeled with finite element method. Infill walls are generally treated as non-structural elements considerably to improve the lateral stiffness, strength and ductility of the structure together with the frame elements. Because of their complex nature, they are often neglected in the analytical model of building structures. However, in seismic design, ignoring the effect of infill wall in a numerical model does not accurately simulate the physical behavior. In this context, there are still some uncertainties in mechanical and also geometrical properties in the analysis and design procedure of infill walls. Structural uncertainties can be studied with a finite element formulation to determine sharp bounds of the structural parameters such as wall thickness and Young's modulus. In order to accomplish this sharp solution as much as possible, interval finite element approach can be considered, too. The structural parameters can be considered as interval variables by using the interval number, thus the structural stiffness matrix may be divided into the product of two parts which correspond to the interval values and the deterministic value.

      • SCOPUSKCI등재

        REPRESENTATIONS BY QUATERNARY QUADRATIC FORMS WITH COEFFICIENTS 1, 2, 5 OR 10

        Alaca,,Ayse,Altiary,,Mada Korean Mathematical Society 2019 대한수학회논문집 Vol.34 No.1

        We determine explicit formulas for the number of representations of a positive integer n by quaternary quadratic forms with coefficients 1, 2, 5 or 10. We use a modular forms approach.

      • Biohydrogen production from engineered microalgae Chlamydomonas reinhardtii

        Kose,,Ayse,Oncel,,Suphi,S. Techno-Press 2014 Advances in energy research Vol.2 No.1

        The green microalgae Chlamydomonas reinhardtti is well-known specie in the terms of $H_2$ production by photo fermentation and has been studying for a long time. Although the $H_2$ production yield is promising; there are some bottlenecks to enhance the yield and efficiency to focus on a well-designed, sustainable production and also scaling up for further studies. D1 protein of photosystem II (PSII) plays an important role in photosystem damage repair and related to $H_2$ production. Because Chlamydomonas is the model algae and the genetic basis is well-studied; metabolic engineering tools are intended to use for enhanced production. Mutations are focused on D1 protein which aims long-lasting hydrogen production by blocking the PSII repair system thus $O_2$ sensitive hydrogenases catalysis hydrogen production for a longer period of time under anaerobic and sulfur deprived conditions. Chlamydomonas CC124 as control strain and D1 mutant strains(D240, D239-40 and D240-41)are cultured photomixotrophically at $80{\mu}mol\;photons\;m^{-2}s^{-1}$, by two sides. Cells are grown in TAP medium as aerobic stage for culture growth; in logarithmic phase cells are transferred from aerobic to an anaerobic and sulfur deprived TAP- S medium and 12 mg/L initial chlorophyll content for $H_2$ production which is monitored by the water columns and later detected by Gas Chromatography. Total produced hydrogen was $82{\pm}10$, $180{\pm}20$, $196{\pm}20$, $290{\pm}30mL$ for CC124, D240, D239-40, D240-41, respectively. $H_2$ production rates for mutant strains was $1.3{\pm}0.5mL/L.h$ meanwhile CC124 showed 2-3 fold lower rate as $0.57{\pm}0.2mL/L.h$. Hydrogen production period was $5{\pm}2days$ for CC124 and mutants showed a longer production time for $9{\pm}2days$. It is seen from the results that $H_2$ productions for mutant strains have a significant effect in terms of productivity, yield and production time.

      • SCOPUSKCI등재

        Orthognathic treatment of facial asymmetry due to temporomandibular joint ankylosis

        Gulsen,,Ayse,Sibar,,Serhat,Ozmen,,Selahattin Korean Society of Plastic and Reconstructive Surge 2018 Archives of Plastic Surgery Vol.45 No.1

        The aim of this study was to present a case series of the orthognathic treatment of facial asymmetry due to temporomandibular joint (TMJ) ankylosis and to characterize the current treatment modalities through a literature review. Four patients who presented with facial asymmetry due to TMJ ankylosis between 2010 and 2014 were included in this study. TMJ ankylosis was surgically treated before bimaxillary surgery with advancement genioplasty in some of the cases. In 2 cases, 3-dimensional (3D) models were used for diagnosis and treatment planning, as 3D models are very important tools for planning surgical maneuvers. Aesthetically pleasant facial symmetry and a good facial profile were obtained in all the cases.

      • KCI등재

        Investigation of human papillomavirus prevalence in married women and molecular characterization and phylogenetic analysis of the virus

        Ayse,Erdem,Yayla,Berrin,Goktug,Kadioglu,Ayse,Aydin,Osman,Aktas 대한산부인과학회 2019 Obstetrics & Gynecology Science Vol.62 No.4

        ObjectiveHuman papillomaviruses (HPVs) are among the agents responsible for infection and cancer of the skin and mucousmembranes in the human body. The aim of this study was to investigate the frequency and type distribution of HPVsin married female patients with gynecological complaints, who had visited the Maternity Hospital in Erzurum, Turkey. MethodsIn this study, 263 cervical swab samples were taken from married women using the Pap smear method and wereinvestigated for positive reactivity against HPV. The L1 gene region of HPV was investigated using molecular methods. For this purpose, polymerase chain reaction (PCR) assays and sequence analysis of positive samples were performed. Phylogenetic analyses were performed using a bioinformatics approach after sequencing. ResultsHPV-DNA was detected in 17 (6.5%) samples. Highest positive reactivity to HPV-DNA was found in the 35–44 agegroup at 9.2%. Fourteen out of seventeen positive samples were included in the phylogenetic analysis. All isolatesclustered in the Alphapapillomavirus genus. Six samples were found to be HPV 70 positive, four were HPV 16 positive,and the rest were HPV 54, 72, 81, and 114 positive. When genotyping data were evaluated according to the riskgroup, we found that 28.6% of the 14 samples were found to be high risk-HPV, and 71.4% were low risk-HPV. ConclusionAs per our knowledge, this is the first report on the phylogenetic analysis of HPV genotypes isolated from women inTurkey. The prevalence of low- and-high risk HPV was determined in married women in Erzurum, and these resultscontribute to the epidemiological data on the distribution of HPV types for this region.

      • Prognostic Factors and Treatment Outcomes in 93 Patients with Uterine Sarcoma from 4 Centers in Turkey

        Durnali, Ayse Tokluoglu, Saadet Ozdemir, Nuriye Inanc, Mevlude Alkis, Necati Zengin, Nurullah Sonmez, Ozlem Uysal Kucukoner, Mehmet Anatolian Society of Medical Oncology (ASMO),, Anatolian Society of M) Asian Pacific Organization for Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5

        Introduction: Uterine sarcomas are a group of heterogenous and rare malignancies of the female genital tract and there is a lack of consensus on prognostic factors and optimal treatment. Objective and Methodology: To perform a retrospective evaluation of clinicopathological characteristics, prognostic factors and treatment outcomes of 93 patients with uterine sarcomas who were diagnosed and treated at 4 different centers from November 2000 to October 2010. Results: Of the 93 patients, 58.0% had leiomyosarcomas, 26.9% malignant mixed Mullerian tumors, 9.7% endometrial stromal sarcomas, and 5.4% other histological types. According to the last International Federation of Gynecology and Obstetrics (FIGO) staging, 43.0% were stage I, 20.4% were stage II, 22.6% were stage III and 14.0 % were stage IV. Median relapse free survival (RFS) was 20 months (95% confidence interval (CI), 12.4-27.6 months), RFS after 1, 2, 5 years were 66.6%, 44.1%, 16.5% respectively. Median overall survival (OS) was 56 months (95% CI, 22.5-89.5 months), and OS after 1, 2, 5 years was 84.7%, 78%, 49.4% respectively. Multivariate analysis showed that age ${\geq}60$ years and high grade tumor were significantly associated with poor OS and RFS; patients administered adjuvant treatment with sequential chemotherapy and radiotherapy had longer RFS time. Among patients with leiomyosarcoma, in addition to age and grade, adjuvant treatment with sequential chemotherapy and radiotherapy after surgery had significant effects on OS. Conclusion: Uterine sarcomas have poor progrosis even at early stages. Prognostic factors affecting OS were found to be age and grade.

      • SCOPUSSCIEKCI등재

        Growing Hemorrhagic Choroidal Fissure Cyst

        Karatas,,Ayse,Gelal,,Fazil,Gurkan,,Gokhan,Feran,,Hamit The Korean Neurosurgical Society 2016 Journal of Korean neurosurgical society Vol.59 No.2

        Choroidal fissure cysts are often incidentally discovered. They are usually asymptomatic. The authors report a case of growing and hemorrhagic choroidal fissure cyst which was treated surgically. A 22-year-old female presented with headache. Cranial MRI showed a left-sided choroidal fissure cyst. Follow-up MRI showed that the size of the cyst had increased gradually. Twenty months later, the patient was admitted to our emergency department with severe headache. MRI and CT showed an intracystic hematoma. Although such cysts usually have a benign course without symptoms and progression, they may rarely present with intracystic hemorrhage, enlargement of the cyst and increasing symptomatology.

      • Relationships between Social Support and Social Image Concerns in Turkish Women with Breast Cancer

        Ozkaraman,,Ayse,Culha,,Ilkay,Fadiloglu,,Zehra,Cicek,Kosgeroglu,,Nedime,Gokce,,Serap,Alparslan,,Guler,Balci Asian Pacific Organization for Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5

        Background: Breast cancer is one of the most common cancer types in women and is amongst the most devastating and stressful events in the life of women. The external appearance of breast cancer patients usually changes due to the surgical and/or medical therapies used. An association may be found between social support perception and social appearance anxiety in patients with breast cancer in the period after mastectomy. Therefore, this study investigated the social appearance anxiety and social support status in women with breast cancer in our country. Materials and Methods: A descriptive cross-sectional study was conducted in breast cancer patients undergoing treatment or follow-up in Medical Oncology and General Surgery departments. Results: The mean age of the participants was $51.13{\pm}8.48$ years (range, 24-74 years) with nearly half of the patients (40.6%) aged 40-50 years. Of the patients, 39.1% had stage 3 breast cancer. The mean score on Cancer Patient's Social Support Scale (CPSSS) was $134.85{\pm}9.35$, and there was a significant difference in CPSSS total scores betweena the age groups, educational levels, self-reported income levels and stage of disease (p<0.05). The mean Social Image Anxiety Scale (SIAS) score was found to be $34.30{\pm}9.35$ (min:16, max:66) in women participating in this study. The CPSSS and SIAS scores of the participants were inversely correlated, and the SIAS score was found to decrease with the increasing CPSSS score but with no statistically significant difference (r=-0.110, p=0.217). Conclusions: Social appearance anxiety is higher in the patients with poor social support.

      • SCIESCOPUSKCI등재

        Effect of different veneering techniques on the fracture strength of metal and zirconia frameworks

        Turk,,Ayse,Gozde,Ulusoy,,Mubin,Yuce,,Mert,Akin,,Hakan The Korean Academy of Prosthodonitics 2015 The Journal of Advanced Prosthodontics Vol.7 No.6

        PURPOSE. To determine whether the fracture strengths and failure types differed between metal and zirconia frameworks veneered with pressable or layering ceramics. MATERIALS AND METHODS. A phantom molar tooth was prepared and duplicated in 40 cobalt-chromium abutments. Twenty metal (IPS d.SIGN 15, Ivoclar, Vivadent, Schaan, Liechtenstein) and 20 zirconia (IPS e.max ZirCAD, Ivoclar) frameworks were fabricated on the abutments. Each framework group was randomly divided into 2 subgroups according to the veneering material: pressable and layering ceramics (n=10). Forty molar crowns were fabricated, cemented onto the corresponding abutments and then thermocycled ($5-55^{\circ}C$, 10,000 cycles). A load was applied in a universal testing machine until a fracture occurred on the crowns. In addition, failure types were examined using a stereomicroscope. Fracture load data were analyzed using one-way ANOVA and Tukey HSD post-hoc tests at a significance level of 0.05. RESULTS. The highest strength value was seen in metal-pressable (MP) group, whereas zirconia-pressable (ZP) group exhibited the lowest one. Moreover, group MP showed significantly higher fracture loads than group ZP (P=.015) and zirconia-layering (ZL) (P=.038) group. No significant difference in fracture strength was detected between groups MP and ML, and groups ZP and ZL (P>.05). Predominant fracture types were cohesive for metal groups and adhesive for zirconia groups. CONCLUSION. Fracture strength of a restoration with a metal or a zirconia framework was independent of the veneering techniques. However, the pressing technique over metal frameworks resisted significantly higher fracture loads than zirconia frameworks.

      • KCI등재SCIESCOPUS

        First Turkish Patient with Floating Harbor Syndrome with Additional Findings: Cryptorchidim and Microcephaly

        Mekadder,Ayse,Selimoglu,Erol,Selimoglu,Vildan,Ertekin,Ibrahim,Caner,Zerrin,Orbak 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.2

        We report the first Turkish patient with Floating Harbor Syndrome (FHS). The 12-year old male patient exhibited classical dysmorphic features of FHS, mental retardation, celiac disease and additional undescribed findings: microcephaly and cryptorchidism.

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