76 research outputs found
Essays on monetary economics
No full textIn my dissertation, I attempt to shed new light on the impact of central bank behavior. The first chapter proposes indexes of monetary policy design characteristics in line with inflation targeting (IT). Indexes aim to provide a useful classification of central banks and to examine whether IT intensity matters for sacrifice ratio and inflation persistence. Results show that U.S. and Japan are ranked close to early targeters. Armenian central bank is detected to perform remarkably well as opposed to the literature's descriptions. Noteworthy structural changes are noticed in Mexico and Peru. Higher index level significantly reduces OECD countries' inflation persistence through increased transparency. Higher intensity among targeters does not deliver significantly lower sacrifice ratio or inflation persistence. Announcing official targets does not provide additional benefits. Low degree of central bank discretion and limited financing of the government significantly decrease the sacrifice ratio among OECD countries and in the full cross-sectional sample respectively. Institutional design features need to be mature enough in order to benefit from inflation targeting. The second chapter examines the usefulness of monetary aggregates. A number of dynamic stochastic general equilibrium models (DSGE) and econometric time series models are jointly specified; including vector autoregressive (VAR), random walk (RW), and various autoregressive (AR) and AR with exogenous variable type models (ARX). Model performance is evaluated via novel testing methods developed for assessing predictive and simulation accuracy. Money is found to matter for inflation simulation purposes in simple econometric models, such as ARX models. With regard to predictive point and density analysis, when complex models are examined, M2 enters into the forecast-best VAR-type inflation models. Model selection is found to be sensitive to researcher’s objective function, to target variable and forecast horizon. Particularly, when the objective is policy analysis, the examination of multivariate models show that DSGE-type models often outperform at longer horizons and mainly for output forecasts. In contrast, VAR-type models win for simulation purposes and short-horizon inflation forecasts. However, univariate models without money generally dominate theoretical and atheoretical multivariate models both with and without money from both forecasting and simulation standpoint.Ph. D.Includes bibliographical referencesIncludes vitaby Demet Tunal
Evaluation of the ımpact of glycemic control on mean platelet volume and platelet activation in children with type 1 diabetes
No full textObjective: The studies evaluating cases with type 1 diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM) in the adult population reported hyperreactive platelets and increased activation of prothrombotic factors, resulting in an increased risk of thrombosis. The aim of this study was to evaluate the effects of poor glycemic control and the duration of diabetes on platelet parameters in pediatric population. Methods: The study included 366 children, out of which 144 (39.3%) were included in the T1DM group and 222 (60.6%) in the healthy control group. The platelet count, mean platelet volume (MPV), platelet distribution width and plateletcrit values were recorded. The children with T1DM were divided into three groups as per their glycated hemoglobin (HbA1c) levels, good ([removed]9%). Results: No significant difference in the MPV level between the T1DM (7.41 ± 1.49 fl) and control (7.15 ± 1.23 fl) groups was observed. However, the MPV levels were significantly higher in the poor glycemic control group than in the healthy control group (p = 0.026). Furthermore, as the duration of diabetes and HbA1c levels increased, the MPV levels also increased (p < 0.001, p = 0.441). Conclusion: This study suggested as the duration of diabetes and HbA1c levels increased, the MPV levels also increases. Evaluation of hematological parameters can be a cheap and useful method in the evaluation of diabetes regulation in patients with diabetes. © 2022 The Author(s) [2022]. Published by Oxford University Press. All rights reserved
Synthesis and Characterization of Hydroxyapatite Powders From Eggshell For Functional Biomedical Application
No full textBulus, Erdi (Arel Author), İsmik, Deniz (Arel Author), Mansuroğlu, Demet Sezgin (Arel Author), Şahin, Yeşim Müge (Arel Author)Apatitic phosphates are considered within the category of bioceramics. HA and its derives are used of in the fields of medicine, orthopedics and dentistry in order to support a grow up of new bone cells. HA structures have a high biocompability and are widely in biomedical applications. On the other hand, synthesis of HA structures necessitates complex technologies (microwave sintering, hydrothermal synthesis etc.) and their production costs high. This study aims the production of nano apatitic structures with great biocompability from a natural material. Simple hotplate method was used to obtain natural, nano scale HA from eggshells. After calcination and sintering processes at different temperatures, the obtained apatitic phosphate powders have been structurally characterized by infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Morphological investigation has been conducted by FEG-SEM images. Biological investigations have been carried out for the produced nanosized bioceramics and the results reveal that these nanomaterials are promising for tissue engineering purposes
Swelling and drying process in ionic hydrogels for low and high pH using fluorescence technique
No full textBuildup factors and kerma for Al2O3 and SiO2 in the energy range 0.015-15 MeV
No full textThe energy absorption buildup factors (EABF) have been calculated for some thermoluminescent dosimetric materials (Al2O3 and SiO2) in the energy region 0.015-15 MeV up to the penetration depth of 40 mean free paths (mfp). Also, kerma relative to air has been determined for these materials. It is observed that the energy absorption buildup factors and kerma relative to air depend on the photon energy and chemical content. Also, the energy absorption build up factors are found the highest in intermediate energy whereas the lowest in low-as well as high energies
The Poet’s Novel
No full textThe fantastic novel “The Poet’s Novel”, which was written by Murathan Mungan and published in 2011 by Metis Publishing, points out some important matters on information science which is significant especially for the librarians. Mungan, in the novel, at an unknown time and place, introduces his readers to a fiction that praises poetry. It is not only a praise on poem that he wrote in this novel, but also it is full of praise on writing, knowledge, learning, and mastery. The author makes his heros say wise words on "knowledge" in many section of the book. Because of these features this novel, that librarians might be interested, will be read by my colleagues with pleasure
The use of design elements and principles in space narrative in the context of architecture and literature: The example of Murathan Mungan
No full textMimarlık ve edebiyat arasında devingen, değişime açık bir ilişki vardır. Bu ilişki farklı yönleriyle birçok akademik çalışmanın konusu olmuştur. Bu çalışmada da mimarlık ve edebiyat ilişkisine yeni bir bakış açısıyla yaklaşılmaktadır. Eserlerinde mekânı kullanım şekliyle ön plana çıkan yazarlardan biri olan Murathan Mungan'ın roman ve hikayelerindeki yazınsal mekânlar mimari boyutlarıyla ele alınmıştır. Çalışmanın amacı edebi eserlerdeki mekân tasvirlerinde tasar öge ve ilkelerinin kullanım şeklinin araştırılması ve yazarın yaratım sürecinde mimari eğilimlerinin belirlenmesidir. Görsel disiplin olan mimarlık ile sözel disiplin olan edebiyatın ortak noktası olan mekân kavramı bu bağlamda değerlendirilmiştir. Giriş bölümünde tezin problemi, amaç ve önemi, kapsamı ve yöntemi açıklanmıştır. Çalışmanın kavramsal altyapısının oluşturulması için mimarlıkta edebiyat ve edebiyatta mimarlığın kullanımı ile ilgili bilgiler verilmiştir. Daha sonra tasar öge ve ilkeleri örneklerle beraber detaylıca açıklanmıştır. Çalışmanın daha iyi anlaşılabilmesi için yazar Murathan Mungan'ın hayatı, edebi kişiliği ve eserleriyle ilgili bilgiler verilmiştir. İncelenecek eserler seçilirken anlatılan mekânın yalnızca olayların geliştiği bir arka plan görevi görmemesi, hikâyenin bir parçası olmasına dikkat edilmiştir. Çalışma kapsamında seçilen metinler ile ilgili genel bilgiler özetlenmiş daha sonra bu metinlerde betimlenen mekânlar tasar öge ve ilkeleri merkezli bir bakış açısıyla incelenmiştir. Yazarın sırasıyla Yüksek Topuklar, Çador, Şairin Romanı, Hamamname, Son İstanbul, Cenk Hikayeleri, Kırk Oda, Lal Masallar, Kaf Dağının Önü, Üç Aynalı Kırk Oda eserleri için incelemeler yapıldıktan sonra elde edilen veriler tablolaştırılmıştır. Bu verilerden oluşan bulgular değerlendirilmiştir. Sonuç bölümünde seçilen on eserin incelenmesiyle elde edilen bilgilerle Murathan Mungan'ın mekân anlatımında mimari öge kullanma eğilimleri irdelenmiştir. Mimarlık ve edebiyat ilişkisine dair bundan sonra yapılacak çalışmalar için öneriler sunulmuştur.There is a dynamic and open to change relationship between architecture and literature. This relationship has been the subject of many academic studies in different aspects. This study approaches the relationship between architecture and literature from a new perspective. Literary spaces in the novels and stories of Murathan Mungan, one of the writers who stands out with the way he uses space in his works, are discussed with their architectural dimensions. The aim of the study is to investigate the use of design elements and principles in the depiction of space in literary works and to determine the architectural tendencies of the author in the creation process. The concept of space, which is the common point of architecture, a visual discipline, and literature, a verbal discipline, is evaluated in this context. When selecting the artifacts to be examined, attention was paid to the fact that the place depicted not only serves as a background against which events unfold, but is also part of the story. In the introduction, the problem, purpose and importance, scope and method of the thesis are explained. In order to create the conceptual infrastructure of the study, information about the use of literature in architecture and architecture in literature is given. Then the elements and principles of design are explained in detail with examples. For a better understanding of the study, information about the life, literary personality and works of the author Murathan Mungan is given. General information about the texts selected within the scope of the study is summarized, and then the spaces described in these texts are analyzed from a perspective centered on the elements and principles of design. After examining the author's works Yüksek Topuklar, Çador, Şairin Romanı, Hamamname, Son İstanbul, Cenk Hikayeleri, Kırk Oda, Lal Masallar, Kaf Dağının Önü, Üç Aynalı Kırk Oda, the data obtained were tabulated. The findings of these data were evaluated. In the conclusion section, Murathan Mungan's tendency to use architectural elements in the narration of space is analyzed with the information obtained by analyzing the ten selected works. Suggestions for future studies on the relationship between architecture and literature are presented
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