75 research outputs found
Quality of life improves after minimally invasive repair of pectus excavatum
No full textBackground: Pectus excavatum is the most common chest wall deformity. This deformity may cause physical limitations and psychosocial problems. In this study, we aimed to investigate the effect of minimally invasive repair of pectus excavatum on the quality of life. Methods: This study included 88 patients, aged 18.44±3.93 years (85.2% male), who underwent minimally invasive repair of pectus excavatum; 40.9% had an associated anomaly or disease, and 17.0% had scoliosis. The patients and their parents completed the patient and parent forms of the Nuss questionnaire modified for adults preoperatively and 6 months after the operation. Results: The patients median Nuss score increased from 31 (interquartile range 31-35) preoperatively to 43 (interquartile range 43-46) at 6 months after the operation (p=0.000). The parents preoperative score of 33 (interquartile range 29-36) increased to 38 (interquartile range 34-41; p=0.000). Improvements in the physical and psychosocial component scores of the Nuss questionnaire were also significant in the patient (p=0.000, p=0.000, respectively) and parent forms (p=0.005, p=0.000, respectively). Conclusions: Minimally invasive repair of pectus excavatum significantly improved the physical and psychosocial wellbeing of patients. Longitudinal studies are needed to determine the long-term changes related to quality of life. © The Author(s) 2014
İbn Fadlan’ın (Rıhletu’bni Fadlan) Seyahatnamesinde Türklüğe Bakış Açısı
No full textİbn Fadlan Halife Muktedir döneminde, elçilerin yanında Bulgar Hükümdarı Almış Han’a halifenin mektubunu okumakla görevlendirilmiş bir seyyahtır. Ayrıca 4.000 dinarlık maddi yardım ile birlikte birçok hediyenin sorumluluğu da İbn Fadlan’a verilmiştir. Bu seyahat sırasında vermiş olduğu olumsuz bilgiler, tamamen kişisel görüşüdür. Oğuzlarla ilgili olarak birçok seyahatnameyi incelediğimizde İbn Fadlan kadar aşırıya kaçan küçümsemeye rastlamadık. 921-922 yıllarından önce ve sonra Asya’ya giden seyyahların eserleri incelendiğinde genellikle Türklerin ahlakî yönü, dürüstlük ve kahramanlıkları anlatılmaktadır. Yapmış olduğumuz çalışmada Oğuzlarla ilgili olarak söylenilenlerin doğru olmadığını ve şifahî rivayetlere dayandığını tespit etmeye çalıştık.
İbn Haldun was a traveller who had the duty of reading a letter from Khaliph Muktedir to Bulgarian sovereign Almış Han. İbn Haldun was also given the responsibility of 4.000 dinar of financial support and many gifts. During his travel, the negative informations that he gave are compleyely his own thoughts. When we look into many travelogues about Oghuz clan, we realize that we have never seen such insultings as İbn Haldun did. When traveller’s pieces are studied who went to Asia before and after 921-922 yeas, we see that they usually tell about Turk’s behavior, honesty and their bravery. We tried to identify that storiesabout the Oghuz clan are not true and they are only verbal romours
A review of intrinsic self-healing capability of engineered cementitious composites: Recovery of transport and mechanical properties
No full textWOS: 000366227100002The need for viable materials in sustainable infrastructures is driving the creation of multifunctional strain-hardening cementitious composites that combine brittle cementitious matrices with fibers. Unlike conventional concrete, these materials typically show multiple microcracking behavior with strain-hardening response under tensile loading. Even with tight widths, however, crack formation is a critical problem that reduces the mechanical performance of structures and accelerates the ingress of water and aggressive substances. As part of a class of cement-based composites exhibiting strainhardening response, engineered cementitious composites (ECCs) have a high likelihood of preventing water and harmful chemicals from penetrating by sealing existing cracks and regaining original mechanical and durability properties through self-healing. This promises to contribute to the development of a new generation of highly durable, damage-tolerant structures. ECCs are potentially excellent for intrinsic self-healing due to tight crack widths and high amounts of supplementary cementitious materials in their mixture proportions. This paper details the parameters governing self-healing efficiency and the effect of self-healing on the residual mechanical and transport properties of cementitious composites. Test methods measuring the effect of these parameters on healing efficiency are also described. (C) 2015 Elsevier Ltd. All rights reserved.Scientific and Technical Research Council (TUBITAK) of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [MAG-112M876]; Turkish Academy of Sciences, Young Scientist Award programTurkish Academy of Sciences; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)The authors gratefully acknowledge the financial assistance of the Scientific and Technical Research Council (TUBITAK) of Turkey provided under Project: MAG-112M876 and the Turkish Academy of Sciences, Young Scientist Award program. The second author would also like to acknowledge the financial support of TUBITAK for the 2219 Scholarship
Influence of limestone powder on mechanical, physical and self-healing behavior of Engineered Cementitious Composites
No full textWOS: 000364258100001Environmental considerations have led to a global trend of using blended cements instead of ordinary Portland cement; cements containing limestone powder (LP) have recently entered the market. This research focuses on the effect of replacing LP content with cementitious material on the performance of Engineered Cementitious Composite (ECC) containing high-volume fly ash (FA). For this purpose, ECC mixtures were created in which cement and FA were partially replaced by 5%, 10% and 20% of LP and ECC mixture without LP (as control). The samples were precracked at the age of 28 days and left under continuous water curing (CW) for recovery of their properties. Compressive strength, modulus of rupture (MOR), mid-span beam deformation capacity, rapid chloride penetration testing (RCPT) and resistivity testing were used to assess the mechanical, physical and self-healing capability of ECC mixtures. Experimental results show that all mixtures exhibited self-healing with slight differences. Microstructure was also assessed using SEM-EDS and XRD analysis. The microstructural analysis of healed cracks in LP-incorporated ECC mixtures showed the presence of calcite, portlandite and C-S-H gels as well as monocarboaluminate, which confirmed a possible reaction between FA and LP. Due to self-healing, the recovery in mechanical and durability performance of the mixtures proposed in this research is anticipated to positively affect life cycle costs and lead to increased civil infrastructure sustainability. (C) 2015 Elsevier Ltd. All rights reserved.National Science and Engineering Research Council (NSERC) of CanadaNatural Sciences and Engineering Research Council of Canada; Scientific and Technical Research Council (TUBITAK) of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [MAG-112M876]; Turkish Academy of Sciences, Young Scientist Award programTurkish Academy of Sciences; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)The authors acknowledge the financial support of the National Science and Engineering Research Council (NSERC) of Canada. They also gratefully acknowledge the financial assistance of the Scientific and Technical Research Council (TUBITAK) of Turkey provided under Project: MAG-112M876 and the Turkish Academy of Sciences, Young Scientist Award program. The third author would also like to acknowledge the financial support of TUBITAK for the 2219 Scholarship
Sakin Şehirlerin Tanıtım Filmleri Üzerine İçerik Analizi: Gökçeada, Foça, Seferihisar, Köyceğiz ve Finike Örneği
No full textDetermining İnformation and İdeas of Students About Education On Beekeeping İn Veterinary Medicine At Ankara University
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Effects of electric field on the properties of 2D topological insulators
No full textTwo-Dimensional (2D) topological insulators (TIs), are new and promising materials for the applications such as spintronics and optoelectronics due to their unique surface states that are topologically protected and thus robust against nonmagnetic impurities and disorders. The existence of these remarkable electronic states in TIs can be attributed to the large spin-orbit (SO) coupling. The researchers have paid attention to Bi based two-dimensional materials due to high SO coupling effect. Among them, GaBi, InBi, GaBi3 and InBi3 are good candidates for 2D Tls materials. Although there are a lot of studies in these 2D Tls, a detailed understanding of the effect of E-Field is lacking. Applying external E-field can change the electronic properties, which may enable to realize the change on the properties of the materials. We have performed theoretical study of GaBi, InBi, GaBi3 and InBi3 to investigate the effect of E-field to explore band structure, charge distribution and geometries
Interactions of amino acids with adatoms(Ti, C, O) decorated graphene via effect of charging
No full textAs amino acids take an important role in biology, it is envisaged that understanding of their interactions with nanomaterials can resolve critical problems in the field of biomedicine. Graphene, single atom thick hexagonal lattice of sp(2)-bonded carbon, can be used for this purpose. The remarkable properties of graphene sheets could facilitate their application in areas like hydrogen technology, electronics, and sensing. In this work, we report density functional theory calculations of the adsorption of Histidine and Leucine molecules on pristine and decorated (Ti,C and O) graphene. The obtained binding energies of molecules on graphene surface are in good agreement previous studies. The chemisorption is achieved when Graphene is decorated with Ti and C. It is also shown that how modify structural properties of the molecules on pristine (Graphene by applied charging for the first time
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