202 research outputs found
Static and dynamic properties of CN/Cu(001) surfaces and oxidation, dissociation and bimolecular debarboxylation of isocyanate species adsorbed on Cu(001)
No full textThis dissertation presents an outlines my investigations of static and dynamic properties of adsorbed cyanide (CN) and isocyanate (-NCO) species as well as some of their chemistries. Surface bound CN-containing species have not previously been studied extensively, partially due to the inapplicability of fundamental e-beam based surface analysis techniques for investigations. I had the opportunity in my studies to employ multiple surface probing techniques, i.e. HAS, XPS, NEXAFS, TPD and RAIRS, to compile and cross-examine information from CN, –NCO, and derived species, adsorbed on the Cu(001) surface. While angle resolved He atom scattering (HAS) was employed to identify and investigate the ordered superstructure of CN/Cu(001) surfaces, TOF-HAS was employed to investigate its dynamic properties. The CN/Cu(001) surface induced unprecedented simultaneous coherent He diffraction with a large “classical” multiphonon backscattered He intensity. A superstructure is implied that contains both rigidly bound CN species, which maintain the long range c(10x6) translational symmetry, together with bound highly-dynamic CN species that exhibit large thermally induced displacements. The NEXAFS measurements suggest multiple spatial binding configurations for the adsorbed CN moieties. In addition, TPD spectra of C2N2 desorption from CN/Cu(001) surface were analyzed, using my newly developed method, to determine the activation energies for desorption as a function of CN coverage. There are two reactions of NCO species examined in my studies. The first is the newly discovered mutual reaction between NCO species. This type of interaction had not been seen before, as it is essentially difficult to prepare pure NCO/metallic surfaces. Copper was chosen as a substrate as HNCO exposures of Cu(001) at RT, followed by spontaneous H2 desorption, do produce NCO only surfaces. A thermal treatment of the surface, at 573K, leads to a bimolecular decarboxylation of NCO, leaving a carbodimide species (NCN) on the surface. The sp-hybridized linear NCN moieties, which are bound nearly parallel to the substrate, show high thermal stability. The second reaction of NCO, which I have studied, is its oxidation. In particular, the effect of CN coadsorbates on the oxidation of NCO was studied. It was found that the presence of CN catalyzes a dissociation reaction of NCO species on Cu(001).Ph. D.Includes bibliographical referencesby Erkan Ziya Ciftlikl
Hüzün Turizmi Ritüeli Ölçeğinin Türkçe’ye Uyarlanması Üzerine Bir Çalışma
No full textBu çalışmanın amacı Sun ve Lv (2024) tarafından geliştirilen Hüzün Turizmi Ritüeli Ölçeği’nin Türkçe’ye uyarlama çalışmasını yapmaktır. İlgili ölçeğin hüzün turizmi üzerine nicel araştırma yapmayı planlayan Türk araştırmacılar için tercih edilen bir ölçek olacağı düşünülmüştür. Çalışma için gerekli veriler Gelibolu Yarımadası Tarihi Milli Parkı’nı ziyaret eden 318 ziyaretçiden toplanmıştır. Veri analizi için SPSS ve AMOS programları yardımıyla açımlayıcı ve doğrulayıcı faktör analizi, güvenirlik ve geçerlik analizleri yapılmıştır. Analizler sonucunda ölçeğin iki boyutlu yapısının doğrulandığı ve Türk kültürüne uyumlu bir ölçek olduğu görülmüştür
The Moderating Role of Organizational Identification on the Relationship between Perceived Organizational Career Management and Intention to Leave
No full textThe available literature suggests that perceived organizational career management is seen as an antecedent of intention to leave and organizational identification is considered to be superior in predicting employees’ turnover intentions. Thus, this study aims at investigating the effect of perceived organizational career management on intention to leave and to determine the moderating role of organizational identification in this relation. The data was collected from 256 employees from the banking sector in the city of Istanbul, Turkey. Hierarchical regression analysis was employed to the gathered data to test the hypotheses developed for the study. The results indicated that perceived organizational career management correlated negatively with intention to leave. It was also found out that organizational identification served as a moderator for the relationship between POCM and intention to leave. Thus, the results point out that the effect of employees’ perceived organizational career management on their intention to leave varies when they identify themselves with their organizations.</jats:p
Effect of size and slenderness on the axial-compressive behavior of basalt FRP-confined predamaged concrete
No full textTo investigate the size and slenderness effect on the axial-compressive behavior of basalt fiber-reinforced polymer (BFRP)-confined predamaged concrete, five groups of concrete cylinders with different sizes and slenderness ratios were designed and tested. The cylinders were axially preloaded to three predamage levels, then repaired using BFRP, and reloaded. The results showed that the concrete predamage had an adverse effect on the ultimate strength and initial elastic modulus of BFRP-confined concrete. Except for the smallest specimens affected by the wall effect, the initial analysis found that the ultimate strength of BFRP-confined concrete decreased with an increase in size and slenderness ratio, and the size and slenderness effect decreased with an increase in BFRP confining pressure, while these increased with the severity of concrete predamage. However, there was no obvious size or slenderness effect on the ultimate strain of BFRP-confined concrete. Through multifactorial analysis, it was confirmed that the ultimate strength of BFRP-confined undamaged and predamaged concrete was influenced by the slenderness. Considering the effect of size, slenderness, and predamage, monotonic and cyclic models were developed for BFRP-confined concrete. Finally, a uniaxial material object was added into OpenSees to provide an effective numerical material model for theoretical analyses and engineering applications. © 2021 American Society of Civil Engineers.The present research was supported by the National Natural Science Foundation of China (Grant No. 51878268) and the Natural Science Foundation of Hunan Province, China (Grant No. 2020JJ4195).
Part of this research was completed by the first author in collaboration with the third and fourth authors during his one-year visit to Ohio State University. The first author acknowledges the State Scholarship Fund of China Scholarship Council (Grant No. 201606135057) for supporting this work and his research visit to the United States
Diverticulum With Papillae: Does Position of Papilla Affect Technical Success?
No full textBasis and Purpose:The presence of peripapillary diverticulum (PPD) can cause some biliary diseases, especially common bile duct stones, and also, literally, can change the technique of endoscopic retrograde cholangiopancreatography (ERCP) and affect the complication ratio of this procedure. In this study, we investigate the effect of localization and position of the papilla according to the diverticulum on the success of therapeutic ERCP procedures.Materials and Methods:The study was conducted prospectively in the patients with naive papillae, who underwent ERCP for a period of 16 months. In all patients, the position of papillae according to the diverticulum (the periphery of the diverticulum is thought as the clock circumference, and the position of papillae is defined as the dials of clock), the success rate of biliary cannulation, total procedure time, overall treatment success rate of ERCP, and the complications are investigated.Results:During this period, 222 (18.5%) of the 1205 enrolled patients who underwent ERCP had PPD. Of the patients with PPD, 123 (55.4%) were female and 99 (44.6%) were male, and the median age was 68.910.1 years. According to the position of the papilla by the diverticulum, 90 (40.5%) patients have it on 7 o'clock position, 64 (28.8%) patients have on 6 o'clock position, 63 (28.3%) patients have on 5 o'clock position, and 5 (2.3%) patients have on 1 o'clock position. In the cases of the papilla on 1 o'clock position according to the diverticulum, cannulation procedures were found to be more difficult than other patients (P<0.05). The presence of the diverticulum did not affect the success of therapeutic procedures and did not increase the ratio of complications.Conclusions:In the presence of PPD, additional cannulation techniques may be required for the procedure. Particularly, the aid of percutaneous techniques may be needed for the papilla on 1 o'clock position
The Prevalence of Barrett Esophagus Diagnosed in the Second Endoscopy A Retrospective, Observational Study at a Tertiary Center
No full textOur study showed that in patients receiving no diagnosis of BE on their first endoscopic examination performed for any reason, the prevalence of BE on their second endoscopy within 6 years was very low (0.66%)
A Comparison of the Ballistic Performances of Various Microstructures in Mil-A Armor Steel
No full textKonca, Erkan/0000-0001-8943-091XDue to their advantageous properties, there is a growing interest in developing armor steels containing fully or partially bainitic microstructures. In this study, bainitic and martensitic microstructures were obtained in rolled homogeneous armor (RHA) steel samples and their ballistic protection performances were investigated. RHA (MIL-A-12560) steel samples were subjected to isothermal heat treatments at three different temperatures, where one temperature (360 degrees C) was above the martensite formation start (Ms) temperature of 336 degrees C while the other two (320 degrees C and 270 degrees C) were below. For the assessment of the ballistic protection performance, the kinetic energy losses of the 12.7 mm bullets fired at the test samples were determined. The promising nature of the bainite microstructure was confirmed as the sample isothermally treated at 360 degrees C provided approximately 10% higher ballistic protection as compared to the regular RHA sample of tempered martensite microstructure. However, the ballistic performances of the isothermally treated samples decreased as the treatment temperature went below the Ms temperature. Following the ballistic tests, hardness measurements, impact tests at -40 degrees C, and macro- and microstructural examinations of the samples were performed. No correlation was found between the hardness and impact energies of the samples and their ballistic performances.ROKETSAN Missile Industries Inc. (Ankara, Turkey)This research was funded by ROKETSAN Missile Industries Inc. (Ankara, Turkey). The APC was paid for by the author
Vocabulary in poet-author Nuri Pakdil in the works of the essasy type
No full textSosyal Bilimler Enstitüsü, Türk Dili ve Edebiyatı Ana Bilim Dalı, Yeni Türk Dili Bilim DalıDilimizdeki sözcüklere cümle içinde kullanım şekline göre çok çeşitli anlamlar yüklenebilmektedir. Bu nedenle bir dildeki sözcüklerin sayısının tespiti kadar kelimelerin çok anlamlılığının tespiti de o dilin zenginliğini ortaya koymada gereklidir. Kelimeleri işleyen, onlara yeni anlatım olanakları sağlayanlar ise şair ve yazarlardır. Nuri Pakdil, kendine has üslubu ve sözcük tercihleriyle oldukça dikkate değer bir yazardır. Hakkında yazılı ve görsel alanda pek çok çalışma yapılmakla birlikte eserleri üzerine söz varlığı açısından bir çalışma yapılmamıştır. Çalışmada Nuri Pakdil'in deneme türündeki eserlerinde yer alan söz varlığının ortaya koyulması amaçlanmıştır. Eserlerin bir bölümü deneme/günlük tarzında olduğundan yazarın yaşamına ait bilgiler de içermektedir. Benzer şekilde eserlerin düşünce yazısı olması sebebiyle yazarın dünya görüşü ile edebî ve fikri eleştirileri de bu eserlerde görülmektedir. Yazarın hayatı, edebi şahsiyeti ve eserleri hakkında bilgi verildikten sonra sözcük ve söz varlığı kavramlarına değinilerek, incelenen eserlerde kullanılan dil, temel söz varlığı bağlamında değerlendirilmeye çalışılmıştır. Çalışmada, eserlerdeki kelimelerin kullanım sıklıklarının tasnifi yapılmıştır. Ayrıca incelenen eserlerin dizinleri de toplu olarak çalışmada yer almaktadır.ABSTRACT The words in our language can be loaded with a variety of meanings according to the usage in the sentence. For this reason, the determination of the number of words in a language as well as the determination of the meaning of words is necessary to reveal the richness of the language. Poet sand writers are the ones who process the word sand provide them with new narrative opportunities. Nuri Pakdil is a remarkable writer with her uniquestyle and vocabulary choices. Although there are many written and visual studies about it, there has not been any study in his vocabulary. Nuri Pakdil, who is a very important man of ideas besides the writer-poet-translatoridentity, is very interesting. In our study, it was a imed to reveal the vocabulary of Nuri Pakdil in his essay types. Since some of the worksare in a trial / daystyle, they also contain information about the life of the author. Similarly, the author's world view and his literary and intellectual criticism can be seen due to the fact that the worksare thought texts. After informing the author about the word and vocabulary in the general framework, the language used in the works examined has been tried to be evaluated in the context of the basic vocabulary. The frequency of use of the words in the Works were classified. In addition, the directories of the studied works are also included in our study
THE INFLUENCE OF SPORTS HOTEL EMPLOYEES'POLITICAL SKILL ON ROLE STRESS: THE MODERATING ROLE OF SELF-EFFICACY
No full textPolitical skill is one of the most important personal resources that employees have. The presence of political skill can cause employees to manage situations such as conflict, ambiguity and overload caused by their roles more effectively. In addition, depending on whether self-efficacy is high or low, the strength of the influence between the relevant variables may increase or decrease. In this context, the study's main purpose is to investigate the moderating role of self-efficacy in the effect of political skill on employees' role stress. The study population of the study consists of those working in sports tourism hotels. The data obtained from 308 sports tourism hotel employees were analyzed with the help of SPSS and Smart PLS programs. According to the findings, it was determined that political skill did not significantly negatively affect role stress and its sub-dimensions, such as role conflict, role overload and role ambiguity. However, when the analysis was made on the moderating role variable, it was revealed that self-efficacy had a moderating role in the effect of political skill on role conflict and role overload among the sub-dimensions of role stress. The findings were discussed in the last part of the study, and suggestions for future research were presented
THE INFLUENCE OF SPORTS HOTEL EMPLOYEES'POLITICAL SKILL ON ROLE STRESS: THE MODERATING ROLE OF SELF-EFFICACY
No full textPolitical skill is one of the most important personal resources that employees have. The presence of political skill can cause employees to manage situations such as conflict, ambiguity and overload caused by their roles more effectively. In addition, depending on whether self-efficacy is high or low, the strength of the influence between the relevant variables may increase or decrease. In this context, the study's main purpose is to investigate the moderating role of self-efficacy in the effect of political skill on employees' role stress. The study population of the study consists of those working in sports tourism hotels. The data obtained from 308 sports tourism hotel employees were analyzed with the help of SPSS and Smart PLS programs. According to the findings, it was determined that political skill did not significantly negatively affect role stress and its sub-dimensions, such as role conflict, role overload and role ambiguity. However, when the analysis was made on the moderating role variable, it was revealed that self-efficacy had a moderating role in the effect of political skill on role conflict and role overload among the sub-dimensions of role stress. The findings were discussed in the last part of the study, and suggestions for future research were presented
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