79 research outputs found

    A Comparison of Original and Inverse Motion in Minkowski Plane

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    In this paper, we investigate the inflection circle, circling-point curve, and center-point curve for the original and inverse motion of Minkowski planes, and we also deal with their degenerate cases individually. For this purpose, we consider the trajectory of origin with respect to the instantaneous invariants of Bottema in Minkowski plane by using hyperbolic numbers. Finally, we give the geometric interpretation of the circling-point and center-point curves by comparing the original and inverse motion in Minkowski planes

    Timelike Tangent Developable Surfaces and Bonnet Surfaces

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    A criterion was given for a timelike surface to be a Bonnet surface in 3-dimensional Minkowski space b

    Bankalarda Uygulanan Hizmet Telafi Stratejilerinin Yarattığı Sonuçların Sosyal Medya Paylaşım Eğilimini Ölçen Bir Araştırma1 A Research Measures The Results’ Tendency of Sharing in Social Media That Created by Service Recovery Strategies Implemented on Banks

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    Tüm dünyada olduğu gibi ülkemizde de bankacılık sektöründe müşteriler, gelişmiş teknoloji ve nitelikli insan gücüne rağmen sıklıkla çeşitli hatalara maruz kalmaktadırlar. Her zaman hataların önüne geçmek mümkün olmadığından, hataların nasıl telafi edileceğinin belirlenmesi ve uygun telafi seçeneklerinin kullanılarak müşteri sadakatinin nasıl sürdürülebileceğini belirlemek, bu çalışmanın ana amacını oluşturmaktadır. Bu amaç doğrultusunda veri toplama yöntemi olarak anket kullanılmış olup, anket soruları kamu ya da özel banka ayrımı yapılmaksızın bankalardan hizmet alan ve hataya maruz kalmış müşteriler arasından rastgele seçilen 395 kişiye uygulanmıştır. Ankette elde edilen verilere SPSS (Statistical Package for the Social Sciences) 21 ve AMOS programları aracılığı ile normallik testi, açıklayıcı ve doğrulayıcı faktör analizi uygulanmıştır. Analizler sonucunda, uygulanan telafi stratejilerinin ve müşterin hatanın ardından bankadan beklentileri ile telafi performansının algılanan kalitesi arasında anlamlı bir ilişki olmasının yanı sıra, telafi performansının algılanan kalitesi ile güven, tatmin, sadakat ve ayrılma davranışları arasında da anlamlı bir ilişki olduğu ortaya çıkmıştır. Bu anlamlı ilişki, başarılı olarak algılanan telafi performansının müşterilerin bankaya karşı duyduğu güven, tatmin ve sadakat oluşumuna katkı sağladığı ve müşterilerin hatanın ardından bankadan ayrılmasını engellediğine işaret etmektedir. Ancak araştırmada müşterilerin telafi sonrası bankaya olan düşünce, tutum ve davranışlarını sınırlı şekilde sosyal medyada paylaştıkları sonucuna ulaşılmıştır. Bu doğrultuda bankalar kendilerine güvenen, tatmin ve sadık müşterilerin devamlılığını sağlayabilmek ve yeni müşterilere ulaşabilmek için doğru telafi uygulamalarını hayata geçirmelidirler. Customers receiving banking services are frequently exposed to various mistakes in our country as well as all over the world despite the advanced technology and the qualified human resources. The main purpose of this work is to determine how to recover from mistakes and how to maintain customer loyalty using appropriate recovery options as it may not always be possible to prevent mistakes. For this purpose, a questionnaire was used as a data collection method and the survey questions were applied to 395 randomly selected customers who received services from banks without distinction of public or private banks and exposed mistake. The normality test, descriptive and confirmatory factor analysis were applied to the data obtained in the questionnaire via SPSS (Statistical Package for the Social Sciences) 21 and AMOS programs. Based on the analysis, it was seen that there is a significant relationship between the applied recovery strategies, the expectations of the customers from the bank and the perceived quality of the recovery performance. Furthermore, it was found that there is also a meaningful relationship between the perceived quality of recovery performance and trust, satisfaction, loyalty and leaving behaviors. This meaningful relationship indicates that the recovery performance which is perceived to be successful contributes to the confidence, satisfaction and loyalty of the customers towards the bank and prevents customers from leaving the bank after a mistake. However, it was concluded by the survey that after the recovery the customers shared limitedly their thoughts, attitudes and behaviors towards the bank on social media. In this direction, banks must apply correct recovery applications in order to ensure the continuity of self-confident, satisfying and loyal customers and to reach new customers

    On simultaneous characterizations of partner-ruled surfaces in Minkowski 3-space

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    In this study, the partner-ruled surfaces in Minkowski 3-space, which are defined according to the Frenet vectors of non-null space curves, are introduced with extra conditions that guarantee the existence of definite surface normals. First, the requirements of each pair of partner-ruled surfaces to be simultaneously developable and minimal (or maximal for spacelike surfaces) are investigated. The surfaces also simultaneously characterize the asymptotic, geodesic and curvature lines of the parameter curves of these surfaces. Finally, the study provides examples of timelike and spacelike partner-ruled surfaces and includes their graphs

    Plasma total anti-oxidant capacity correlates inversely with the extent of acute appendicitis: a case control study

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    BACKGROUND: The role of free oxygen radicals in inflammatory conditions is well known. Free radicals cause lipid peroxidation of cellular membranes resulting in cell death. The purpose of this study was to investigate the levels of total anti-oxidant status (TAS), as a marker of anti-oxidant defense system and malondialdehyde (MDA), as a marker of oxidative stress, in the plasma of patients with acute appendicitis. METHODS: Fifty-one adult patients with a median age of 31 years who underwent operations with a preoperative diagnosis of acute appendicitis were included in this prospective study. Blood samples for C-reactive protein (CRP), MDA and TAS were collected preoperatively. Groups were compared by using the Mann-Whitney U test. RESULTS: There were 27 patients with acute phlagmenous appendicitis and 19 patients with advanced appendicitis (10 gangrenous and 9 perforated appendicitis), while 5 negative explorations were documented. No significant differences in WBC counts and MDA levels between groups were encountered. Plasma CRP was significantly higher in patients with perforated appendicitis, but not in the other groups. In advanced appendicitis group, TAS level was significantly lower than the other groups. On the other hand, plasma TAS level in acute phlagmenous appendicitis group was significantly higher. CONCLUSION: A decrease in plasma total anti-oxidant capacity might be a predictor of the progression of inflammation to the perforation in acute appendicitis

    Turner syndrome and associated problems in turkish children: A multicenter study

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    Objective: Turner syndrome (TS) is a chromosomal disorder caused by complete or partial X chromosome monosomy that manifests various clinical features depending on the karyotype and on the genetic background of affected girls. This study aimed to systematically investigate the key clinical features of TS in relationship to karyotype in a large pediatric Turkish patient population. Methods: Our retrospective study included 842 karyotype-proven TS patients aged 0-18 years who were evaluated in 35 different centers in Turkey in the years 2013-2014. Results: The most common karyotype was 45,X (50.7%), followed by 45,X/46,XX (10.8%), 46,X,i(Xq) (10.1%) and 45,X/46,X,i(Xq) (9.5%). Mean age at diagnosis was 10.2±4.4 years. The most common presenting complaints were short stature and delayed puberty. Among patients diagnosed before age one year, the ratio of karyotype 45,X was significantly higher than that of other karyotype groups. Cardiac defects (bicuspid aortic valve, coarctation of the aorta and aortic stenosi) were the most common congenital anomalies, occurring in 25% of the TS cases. This was followed by urinary system anomalies (horseshoe kidney, double collector duct system and renal rotation) detected in 16.3%. Hashimoto’s thyroiditis was found in 11.1% of patients, gastrointestinal abnormalities in 8.9%, ear nose and throat problems in 22.6%, dermatologic problems in 21.8% and osteoporosis in 15.3%. Learning difficulties and/or psychosocial problems were encountered in 39.1%. Insulin resistance and impaired fasting glucose were detected in 3.4% and 2.2%, respectively. Dyslipidemia prevalence was 11.4%. Conclusion: This comprehensive study systematically evaluated the largest group of karyotype-proven TS girls to date. The karyotype distribution, congenital anomaly and comorbidity profile closely parallel that from other countries and support the need for close medical surveillance of these complex patients throughout their lifespan. © Journal of Clinical Research in Pediatric Endocrinology

    Characteristics of food allergy in children: National multicenter study

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    Conference: Congress of the European-Academy-of-Allergy-and-Clinical-Immunology (EAACI) Location: Lisbon, PORTUGAL Date: JUN 01-05, 2019Background : Food allergies impose a significant burden on the life of the child and the family. In this study, to determine the demographic characteristics of food allergies, we investigated the characteristics of patients with food allergies in different regions of Pediatric Allergy- Immunology departments in Turkey. Method : Turkey ' s National Study of Allergy and Clinical Immunology Society has conducted a Study Group on Food Allergies. 25 centers participated in this multicenter, cross- sectional and descriptive study.European Academy of Allergy and Clinical Immunolog

    Volume CXIV, Number 4, November 7, 1996

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    Objective: Turner syndrome (TS) is a chromosomal disorder caused by complete or partial X chromosome monosomy that manifests various clinical features depending on the karyotype and on the genetic background of affected girls. This study aimed to systematically investigate the key clinical features of TS in relationship to karyotype in a large pediatric Turkish patient population.Methods: Our retrospective study included 842 karyotype-proven TS patients aged 0-18 years who were evaluated in 35 different centers in Turkey in the years 2013-2014.Results: The most common karyotype was 45,X (50.7%), followed by 45,X/46,XX (10.8%), 46,X,i(Xq) (10.1%) and 45,X/46,X,i(Xq) (9.5%). Mean age at diagnosis was 10.2±4.4 years. The most common presenting complaints were short stature and delayed puberty. Among patients diagnosed before age one year, the ratio of karyotype 45,X was significantly higher than that of other karyotype groups. Cardiac defects (bicuspid aortic valve, coarctation of the aorta and aortic stenosis) were the most common congenital anomalies, occurring in 25% of the TS cases. This was followed by urinary system anomalies (horseshoe kidney, double collector duct system and renal rotation) detected in 16.3%. Hashimoto's thyroiditis was found in 11.1% of patients, gastrointestinal abnormalities in 8.9%, ear nose and throat problems in 22.6%, dermatologic problems in 21.8% and osteoporosis in 15.3%. Learning difficulties and/or psychosocial problems were encountered in 39.1%. Insulin resistance and impaired fasting glucose were detected in 3.4% and 2.2%, respectively. Dyslipidemia prevalence was 11.4%.Conclusion: This comprehensive study systematically evaluated the largest group of karyotype-proven TS girls to date. The karyotype distribution, congenital anomaly and comorbidity profile closely parallel that from other countries and support the need for close medical surveillance of these complex patients throughout their lifespa

    Timelike Bonnet surfaces with non-constant curvature

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    In this study, the criterion of a timelike surface being Bonnet surface in 3-dimensional Minkowski space given by [11] is taken into consideration and by a similar manner of the classification of surfaces in Euclidean space done by I. M. Roussos in [6], timelike surfaces as Bonnet surfaces are investigated in three class as C1, C2 and C3. Timelike surfaces given in the case of C1 have constant mean curvature and were investigated by a detailed way in [11]. In the present study, by investigating the cases of C2 and C3, a criterion of the timelike surfaces with non-constant mean curvature being Bonnet surfaces is determined

    Academic Evaluation of Dreams, Behavioral Psychology School, and Discussion of Parapsychological Experiences

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    In the latter part of the 19th century, Sigmund Freud developed a theory that attempted to explain how one may make sense of their dreams. Clinical practitioners and, to a lesser degree, personality theorists have found this theory to be of considerable use in analyzing the claims taken from dynamic theories of personality, and it has shown to be of tremendous benefit in both areas. In the waning years of the nineteenth century, while Sigmund Freud continued his effort to decipher people's dreams, he also created the core of his theory on the significance of dreams. Freud was quite pleased with his first original and independent effort in psychological theorizing; in fact, it appears that he is reluctant to review it, as he did with many other discoveries made in these early years. Freud's first original and independent effort in psychological theorizing was published in 1896. Freud is widely regarded as one of the most prominent psychologists in the history of the discipline. He was an innovator in psychoanalysis. This demonstrates how pleased Freud was with his accomplishments in this specific area. [Citation needed] The idea that "a dream is an attempt to fulfill a wish" was first proposed by Freud, and it went on to become the central thesis of Freud's revised dream theory, which was published in 1933 as an interesting lecture titled "Revision of Dream Theory." Freud is credited with having coined the phrase "a dream is an attempt to fulfill a wish." Dreams." In 1933, Freud gave a presentation in which he proposed the theory for the first time. "Analysts behave as if they had nothing further to say about the dream, as if the whole narrative of the dream and dream theory has been finished and concluded," In the same piece of writing, Freud made this point. During his life, he came up with an improved theory of anxiety, a fresh theory of motivation, and a theory of the ego that had far-reaching implications. All these theories are still in use today. These three hypotheses are all still considered valid in modern times. These three ideas, taken individually, were a significant advancement in their respective fields. The topic of these three inventions may be considered to be among the most significant when ranked according to the importance of the changes that they brought about. Ego theory was the one that had the most important influence on the formation of current psychoanalytic thinking when compared to these other two schools of thought
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