Agrega dane boyutunun beton dayanımına etkisi ve su emmesine etkilerinin araştırılması

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Bu araştırmada ?agrega dane boyutunun beton dayanımına etkisi ve su emmesine etkileri? konusu incelenmiştir. Küp numuneleri laboratuvar ortamında çeşitli deneyler yapılarak sonuçları en uygun eksponensial eğri formülüyle korelasyon katsayıları bulunmuştur. Araştırmada yapılan başlıca deneyler aşağıda belirtildiği şekildedir.Taze beton numunelerinde mukavemet - birim ağırlık bağıntısıSertleşmiş beton numunelerinde mukavemet - birim ağırlık bağıntısıBasınç dayanımı - su/çimento oranı bağıntısıBasınç dayanımı - ultrases hızı bağıntısıBasınç dayanımı - kompasite bağıntısıAraştırmada tüm numunelerde değişken agrega, kum, çimento, suya ilaveten kimyasal akışkanlaştırıcılar da kullanılmıştır. Laboratuvarda yapılan numunelerden elde edilen sonuçlara göre bulunan sonuçlar yürülükteki TS (Türk Standartları)'ye göre değerlendirilmiştir.Araştırmada kullanılan çimento(Çimsa Çimento San. Tic. A.Ş. Eskişehir Çimento Fabrikası Cem I 42,5), akışkanlaştırıcılar (Çimsa Çimento San. Tic. A.Ş. Mersin Katkı Fabrikasında üretilem Süper Akışkanlaştırıcı) tek kaynaktan alınmış ve kimyasal raporları aynen kabul edilerek kullanılmıştır.Araştırma sonucunda ise laboratuvar ortamında yapılan deneylerle bulunan betonun değerleri ile TS500 formülü kullanılarak bulunan değer arasındaki farkın, uygulamada betonarme yapı elemanlarının projelendirmesinde emniyetli yönde farklılık gösterebileceği mevcut yapıların güçlendirilmesinde düşük donatı ve kesit gereksinimi çıkarabileceği şeklinde yorumlanabilir.In this research, impact of aggregate grain size on concrete strength and water absorption is investigated. The most appropriate exponential curve formulations and correlation coefficients are found by making various experiments on cubic samples in laboratory environment. Experiments that have been done are as follows:Correlation between strength on unset concrete sample and unit weightCorrelation between strength on rigid concrete sample and unit weightCorrelation between compressive strength and water/cement ratioCorrelation between compressive strength and ultra volume speedIn this research; same aggregate, sand, cement, plasticizers in addition to water are used in each sample. Results, which are found by the results of experiments at laboratory, are analyzed according to current TS (Turkish Standards).The cement and plasticizers, which are used in research, are taken from single source (Cimsa Cement San. Tic A.S. Eskisehir Cement Plant Cem I 42,5 and super plasticizers that are produced at Cimsa Cement San. Tic. A.S. Mersin Plant respectively) and they are used by accepting chemical reports exactly.As a result of research; the difference between static elasticity module values of concrete which are obtained by the experiment in laboratory and the values which are found by using TS500 formula can be interpreted as the fact that in practice, project designing of structural element of concrete can be differentiate in secure way and lower equipment and section in order to strength current structure may be needed

The Relationship Between Cd 74 Levels, Macrophage Migration Inhibitory Factor Gene Polymorphism and Clinical Features in Patients with Ankylosing Spondylitis

Objective: In this study, the primary objective was to compare CD 74 antigen levels between patients with ankylosing spondylitis (AS) and healthy controls. The secondary objective was to investigate the distribution of Macrophage Migration Inhibitory Factor (MIF) 173 G/C polymorphisms in AS patients and a control group. Finally, it was also aimed to reveal the presence of a relationship between CD 74 antigen levels and MIF 173 G/C polymorphism

Which swallowing difficulty of food consistency is best predictor for oropharyngeal dysphagia risk in older person?

WOS: 000476771900010Key summary pointsAimOur aim was to investigate which swallowing difficulty of food consistency in older people who did not have any disease that might affect swallowing functions, and which symptoms were most likely related to oropharyngeal dysphagia (OD) risk.FindingsWe have found that the eating/drinking difficulty of thick liquids was the highest predictive value with respect to OD risk and the eating difficulty of mixed content food had the highest diagnostic ratio.MessageThe present study reports that even in older person who do not go to the hospital with the complaints of swallowing difficulty, the difficulty of swallowing thick liquids and especially the mixed content food should be questioned. AbstractPurposeThe present study aimed to investigate which swallowing difficulty of food consistency in participants over 65years of age who did not have any disease that might affect swallowing functions, and which symptoms were most likely related to oropharyngeal dysphagia (OD).MethodsThe cross-sectional and multicenter study was conducted at 12 hospitals including 883 participants aged >= 65years who were fed orally and who were admitted to the physical medicine and rehabilitation outpatient clinics between September 2017 and December 2018. Demographic characteristics were recorded. Katz Daily Living Activities Index (KDLAI), swallowing-related quality of life scale (Swal-QoL) and 10-item Eating Assessment Tool (EAT-10) were used. The participants were asked the yes or no questions including swallowing difficulty of various types of food consistency with the face-to-face interview.ResultsParticipants were divided into two groups as normal swallowing (EAT-10= 3 group) (n=244) according to the EAT-10 scores. While there was no difference related to number of teeth and KDLAI scores between groups (p=0.327 and p=0.221, respectively), the significant difference was found between groups in terms of yes/no questions and Swal-QoL scores (p<0.05). Receiver operating characteristic analysis revealed that eating difficulty of mixed content food provided maximum sensitivity (99%) and eating/drinking difficulty of thick liquid had maximum specificity (77%). The higher area under curve was in eating/drinking difficulty of thick liquid (0.891), and higher positive likelihood ratio (LR) was eating/drinking difficulty of thick liquid (4.26) as well as lower negative LR was eating difficulty of mixed content food (0.01). The higher diagnostic odds ratio was eating difficulty of mixed content food (367.0), and the higher posttest probability was eating/drinking difficulty of thick liquid (0.211).ConclusionWhile eating difficulty of hard solid food is the most common symptom in healthy participants over 65years of age, the eating difficulty of thick liquids is the highest predictive value related to oropharyngeal dysphagia risk. Also, the eating difficulty of mixed content food had the highest diagnostic ratio

The GUSS test as a good indicator to evaluate dysphagia in healthy older people: a multicenter reliability and validity study

Purpose Dysphagia is known to be a disorder of the swallowing function, and is a growing health problem in aging populations. Swallowing screening tests have mostly been studied in comorbidities such as stroke associated with old age. There is no simple, quick and easy screening test to best determine the risk of oropharyngeal dysphagia in geriatric guidelines. We aimed to evaluate whether the Gugging Swallowing Screen (GUSS) test is an effective method for evaluating swallowing difficulty in healthy older people. Methods This cross-sectional and multicenter study was conducted at 13 hospitals between September 2017 and February 2019. The study included 1163 participants aged >= 65 years and who had no secondary dysphagia. Reliability was evaluated for data quality, scaling assumptions, acceptability, reliability, and validity as well as cutoff points, specificity and sensitivity. Results The age distribution of 773 (66.5%) patients was between 65 and 74 years and 347 (29.8%) of them were male and 767 (66%) patients were female. The average total GUSS score was 18.57 +/- 1.41. The Cronbach's alpha was 0.968. There was a moderate statistically significant negative correlation between the total GUSS and 10-item Eating Assessment Tool scores as well as between the total GUSS score and quality of life. The cutoff point of the total GUSS score was 18.50, sensitivity was 95.5% and specificity was 94.4%. Conclusions The GUSS test is a valid and reliable test to identify possible oropharyngeal dysphagia risk in healthy older people who had no secondary dysphagia. It is suitable as a screen test for clinical practice

Best Practice Recommendations for Stroke Patients with Dysphagia: A Delphi-Based Consensus Study of Experts in Turkey-Part I: Management, Diagnosis, and Follow-up

Dysphagia is one of the most common and important complications of stroke. It is an independent marker of poor outcome after acute stroke and may become chronic after the acute period and continues to affect all aspects of the patient's life. Patients with stroke may encounter any of the medical branches in the emergency room or outpatient clinic, and as in our country, there may not be specialists specific for dysphagia, such as speech-language pathologists (SLP), in every hospital. This study aimed to raise awareness and create a common opinion of medical specialists for stroke patients with dysphagia. This recommendation paper has been written by a multidisciplinary team and offers 45 recommendations for stroke patients with dysphagia. It was created using the eight-step Delphi round via e-mail. This study is mostly specific to Turkey. However, since it contains detailed recommendations from the perspective of various disciplines associated with stroke, this consensus-based recommendation paper is not only a useful guide to address clinical questions in practice for the clinical management of dysphagia in terms of management, diagnosis, and follow-up, but also includes detailed comments for these topics

Best Practice Recommendations for Stroke Patients with Dysphagia: A Delphi-Based Consensus Study of Experts in Turkey-Part II: Rehabilitation.

Dysphagia is one of the most common and important complications of stroke. It is an independent marker of poor outcome after acute stroke and may become chronic after the acute period and continues to affect all aspects of the patient's life. Patients with stroke may encounter any of the medical branches in the emergency room or outpatient clinic, and as in our country, there may not be specialists specific for dysphagia, such as speech-language pathologists (SLP), in every hospital. This study aimed to raise awareness and create a common opinion of medical specialists for stroke patients with dysphagia. This recommendation paper has been written by a multidisciplinary team and offers 45 recommendations for stroke patients with dysphagia. It was created using the eight-step Delphi round via e-mail. This study is mostly specific to Turkey. However, since it contains detailed recommendations from the perspective of various disciplines associated with stroke, this consensus-based recommendation paper is not only a useful guide to address clinical questions in practice for the clinical management of dysphagia in terms of management, diagnosis, and follow-up, but also includes detailed comments for these topics

Best Practice Recommendations for Geriatric Dysphagia Management with 5 Ws and 1H

Background: Dysphagia is a geriatric syndrome. Changes in the whole body that occur with aging also affect swallowing functions and cause presbyphagia. This condition may progress to oropharyngeal and/or esophageal dysphagia in the presence of secondary causes that increase in incidence with aging. However, no study has been published that provides recommendations for use in clinical practice that addresses in detail all aspects of the management of dysphagia in geriatric individuals. This study aimed to answer almost all potential questions and problems in the management of geriatric dysphagia in clinical practice. Methods: A multidisciplinary team created this recommendation guide using the seven-step and three-round modified Delphi method via e-mail. The study included 39 experts from 29 centers in 14 cities. Results: Based on the 5W and 1H method, we developed 216 detailed recommendations for older adults from the perspective of different disciplines dealing with older people. Conclusion: This consensus-based recommendation is a useful guide to address practical clinical questions in the diagnosis, rehabilitation, and follow-up for the management of geriatric dysphagia and also contains detailed commentary on these issues