Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14627/7

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Citation Count: 2
Inverse Problem for Euler-Bernoulli Equation With Periodic Boundary Condition
(Univ Nis, Fac Sci Math, 2018) Kanca, Fatma; Baglan, Irem; Bilgisayar Mühendisliği Bölümü
In this work the inverse coefficient problem for Euler-Bernoulli equation with periodic boundary and integral addition conditions is investigated. Under some natural regularity and consistency conditions on the input data the existence, uniqueness and continuously dependence upon the data of the solution are shown by using the generalized Fourier method. Numerical tests using the implicit finite difference scheme combined with an iterative method are presented and discussed. Also an example is presented with figures.
Citation Count: 1
The Effects of Maternal Omega-3 Fatty Acid Supplementation on Breast Milk Fatty Acid Composition
(İstanbul Medipol University, 2018) Garipağaoğlu Denizhan, Muazzez; Büyükuslu, N.; Batırel, S.; İlktaç, H.Y.; Garipağaoğlu, M.; Beslenme ve Diyetetik Bölümü
Breast milk is the first source of omega-3 fatty acids (FA) for infants. We hypothesized that maternal omega-3 FAs supplementation affects the FA composition of breast milk. Thirtysix women received 950 mg omega-3 polyunsaturated (PUFA) supplementation per day for 9 months from 22-24 weeks of pregnancy until the 6 months of lactation and 26 women were enrolled as controls. Demographic data and nutritional status were taken by a questionnaire. Breast milk samples were collected at just after birth and 6 months of lactation. Fatty acids were analyzed by gas chromatography mass spectrometry (GC-MS). Data was assessed using SPSS 22.0 software. The supplementation increased the level of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) while decreased the level of saturated fatty acids (SFA) in breast milk. The ratio of omega-6/omega-3 FAs was also decreased in the supplemented mothers’ milk. In conclusion the maternal supplementation of omega-3 FAs improved the DHA and EPA levels. © 2018, İstanbul Medipol University. All rights reserved.
Citation Count: 0
Marketing Ethics and Ethical Issues Related To Marketing Communication
(Springer-verlag Singapore Pte Ltd, 2018) Sayil, Emine Mediha
[No Abstract Available]
Citation Count: 2
Isokinetic Knee Muscular Strength Is Associated With Hematologic Variables in Female Modern Dancers
(Spanish Assoc Sports Performance Analysis-aearedo, 2018) Tekin, Demet; Tekin, Demet; Terapi ve Rehabilitasyon Bölümü
It is important to expose the risk factor in injury in the context of the health and the careers of dancers. Female are at greater risk of developing anemia than men, yet scarce data exist on anemia associated outcomes in female dancers. The aim of the present study was to investigate the relationships between bilateral isokinetic knee extensor and flexor muscles strength, and biochemical hematologic parameters in female modern dancers. Concentric isokinetic peak torque [(PT)-N.m], peak torque % body weight [(PT% BW)-N.m.kg(-1)], average peak torque [(AVGPT)-N.m] and total work [(TW)-J)] of the knee extensor and flexor muscles were measured at a velocity of 60 degrees, 180 degrees and 300 degrees s(-1). To determine hematological parameters [red blood cell count (RBC), hematocrit (Hct), and Hb] were determined. The dancers of LHG and HHG had significant differences (p <= 0.05) for hematological parameters. HHG dancers' strength production in extensors muscles of PT, TW and AVGPT in non-dominant left leg (p <= 0.05) were significantly higher than LHG dancers. There were significant (p <= 0.05) negative correlations between TW (300 degrees s(-1)) of left leg extensor muscles and RBC, Hct and Hb variables. Isokinetic knee muscular strength is associated with hematologic variables in female modern dancers. The current study provides evidence that the low-level hematologic parameters has decreased performance on torque production of extensors knee muscles in non-dominant leg during isokinetic muscle strength endurance in female modern dancers.
Citation Count: 21
Balance Training in Modern Dancers Proprioceptive-Neuromuscular Training Vs Kinesio Taping
(Science & Medicine inc, 2018) Tekin, Demet; Agopyan, Ani; Baltaci, Gul; Terapi ve Rehabilitasyon Bölümü
Kinesio tape and proprioceptive exercises are both used for increasing balance in dancers. The purposes of this study were to: a) determine the acute effect of kinesio tape (KT) application on the ankle joint on balance performance, b) investigate the effects of an 8-week proprioceptive-neuromuscular (PN) training program on balance performance, and c) compare their effects vs modern dance technique classes alone. Thirty-three trained, university-level modern dance students (9 male, 24 female) were divided randomly into three groups: kinesio tape (KT, n=11), proprioceptive-neuromuscular (PN, n=11), or control (n=11). Static (turn-out passe-opened eyes/releve and turn-out passe-closed eyes/flat foot), semi-dynamic (airplane), and dynamic balance (monopodalic-straight and -transverse in a turn-out passe-eyes opened/flat foot) tests were performed before and after the intervention. One day after pre-tests, KT mechanical correction technique was applied to the left ankle joint (supporting leg) in the KT group, and tests were repeated to determine the acute effect of KT. The PN group participated in an 8-week balance training program (2 days/wk, 60 min/day) involving exercises using stable and unstable surfaces. Significant improvements were observed for all static and dynamic balance tests in the PN group; semi-dynamic airplane and dynamic monopodalic-straight and transverse tests improved in the KT group; and only semi-dynamic airplane test scores changed significantly for the control group (p<0.05). Our findings suggest that with the exception of the semi-dynamic airplane test, both PN training and KT application were more effective at improving balance performance for modern dancers than modern dance technique classes alone.
Citation Count: 4
A Systematic Approach for Improving the Software Management Process
(World Scientific Publ Co Pte Ltd, 2019) Birgün, Semra; Cerkezoglu, Burcu Tanrikut; Endüstri Mühendisliği Bölümü
Information technology is an indispensable element in applications in today's industrial era. In addition to modern management approaches, software just as well as hardware is of great importance to ensure competitive advantage if the company needs to keep pace with industrial requirements. Information sector can be seen as a competition opportunity for emerging countries. To be able to exploit this opportunity, companies need to be agile and innovative. In this paper, we suggest a process innovation which is intended to be a new model for designing an efficient and effective software process. The model was applied at a software company, and the results of this study are reported here. Lean and agile approaches were used, and as a result, the firm achieved significant improvements in cost, time, labor force, quality, internal and external customer satisfaction, speed, reliability and productivity.
Citation Count: 2
Identification Problem of a Leading Coefficient To the Time Derivative of Parabolic Equation With Nonlocal Boundary Conditions
(Springer international Publishing Ag, 2019) Kanca, Fatma; Mishra, Vishnu Narayan; Bilgisayar Mühendisliği Bölümü
In this study, the problem of determining the time-dependent leading coefficient to the time derivative of heat equation with nonlocal boundary and integral addition conditions is considered. The existence and uniqueness of a solution of the inverse problem under considerations are established. Some results on the numerical solution with an example are presented.
Citation Count: 4
Skeletal Muscle Fatigue Does Not Affect Shooting Accuracy of Handball Players
(Ios Press, 2019) Akyüz, Beyza; Avsar, Pinar Arpinar; Bilge, Murat; Deliceoglu, Gokhan; Korkusuz, Feza; Antrenörlük Eğitimi Bölümü
BACKGROUND: Shooting accuracy and ball speed are important factors relating to scoring in handball that could be affected by skeletal muscle fatigue. OBJECTIVE: To explore the effects of muscle fatigue on male handball players' shooting accuracy and ball speed. METHODS: Sixteen elite handball players (M-age = 17.1 +/- 1.7 years) participated in the laboratory and the field-testing sessions. Running speeds equal to 75% of participants' maximal oxygen uptake (VO2max) values from laboratory tests were used as the initial velocity for the 30-15 intermittent fitness test (30-15(IFT)) in the fatigue protocol. Participants shot to the target at random visual signals placed behind the target before and after fatigue. In order to measure wrist acceleration and ball speed, an accelerometer and a radar gun are used respectively and numbers of accurate and inaccurate shots also recorded. RESULTS: There were no significant differences between pre-fatigue and post-fatigue protocols in terms of accurate and inaccurate shots, and ball speed. Only wrist acceleration in the Y axis (M-pre(-fatigue) = 33.12, SD = 1.17msec; M-post - fatigue = 34.50, SD = 1.21msec) was affected by the fatigue protocol in inaccurate shots (p = 0.042). CONCLUSIONS: Muscular fatigue does not affect shooting accuracy and ball speed in male handball players.
Citation Count: 1
Design and Development of a New Tactile Stimulator
(Ieee, 2019) Levent, Vecdi Emre; Levent, Vecdi Emre; Aydin, Nizamettin; Bilgisayar Mühendisliği Bölümü
We have designed and implement a tactile stimulator to obtain information from the central nervous system. Our system consists of two main components. The first one is tactile stimulator, which was designed to stimulate index and middle finger tips, stimulating mechanoreceptors according to the test protocol. Second one is a personal computer running a desktop software for the implementation of test protocols. The flow is as follows; the subjects are asked the question of the test protocol through the personal computer. The parameters are then transmitted to the embedded board on the machine. The embedded board drives step motors to apply the relevant test parameters. The desktop software expects the individual to answer the question using the right or the left mouse button of the computer mouse. After answering the relevant question, the test proceeds to the next step. According to the test protocol, the stimulation process of the mechanoreceptors located at the index and middle finger tips must start and terminate at the same time. From this perspective, the embedded board with 3 18F46K22 PIC microcontrollers produces 2 square wave signals with different frequencies and amplitudes at the same time. The embedded system card developed with the PIC microcontroller is also developed with FPGA. The system has also been tested on 24 blue and white collar employees and a significant result has been obtained.
Citation Count: 23
An Integrative Approach To Relationship Marketing, Customer Value, and Customer Outcomes in the Retail Banking Industry: a Customer-Based Perspective From Turkey
(Routledge Journals, Taylor & Francis Ltd, 2019) Sayil, Emine Mediha; Akyol, Ayse; Simsek, Gulhayat Golbasi
Given how important it is to provide superior value to customers and to maintain customer loyalty for a sustainable competitive advantage, the aim of this paper is to examine the relationships among relationship marketing components of - trust, competency, commitment, communication, and conflict handling, - relationship investment, relationship quality, perceived customer value, satisfaction and loyalty in an integrated framework in the Turkish retail banking industry. Unlike previous studies, this research extends the literature by analysing affective as well as cognitive dimensions in the same model with a holistic view by simultaneously examining the direct and indirect effects of the related concepts. The distinctive nature of this study is its evaluation of customer satisfaction and loyalty from the perspective of actual consumers. The research model was tested using data collected from 685 retail banking customers by applying structural equation modelling. The findings show that relationship marketing induces loyalty through relationship quality, customer value, and satisfaction, which are mainly provided by trust, communication, and relationship investment. Furthermore, relationship investment and relationship quality are the most important factors in the development of customer value, satisfaction, and loyalty. The emotional value dimension, which captures the affective aspects of perceived value, has the strongest effect on both satisfaction and loyalty.
Citation Count: 2
Solution of the Boundary-Value Problem of Heat Conduction With Periodic Boundary Conditions
(Springer, 2020) Kanca, Fatma; Baglan, I.; Bilgisayar Mühendisliği Bölümü
We investigate the solution of the inverse problem for a linear two-dimensional parabolic equation with periodic boundary and integral overdetermination conditions. Under certain natural regularity and consistency conditions imposed on the input data, we establish the existence, uniqueness of the solution, and its continuous dependence on the data by using the generalized Fourier method. In addition, an iterative algorithm is constructed for the numerical solution of the problem.
Citation Count: 15
Assessment of the Quality and Reliability of Information on Nutrition After Bariatric Surgery on Youtube
(Springer, 2020) Sevdin, Sezen; Kermen, Seda; Sevdin, Sezen; Yildiz, Nida; Guclu, Duygu; Beslenme ve Diyetetik Bölümü
Background YouTube (TM) is a platform that many people, including patients, use to access health information. Recent studies have revealed that videos on YouTube (TM) are misleading or that medical videos may not contain appropriate information. This study aimed to assess the quality and reliability of videos on nutrition after bariatric surgery. Materials and Methods The keywords "after bariatric surgery diet" and "weight loss surgery postop diet" were used, and the first 100 videos for each keyword on YouTube (TM) were analyzed by considering the source, duration, content, and the number of likes of the video. The popularity of the video was calculated using the video power index (VPI) and view rate. The educational quality of the videos was evaluated using the DISCERN score, the Journal of the American Medical Association (JAMA) score, the Global Quality Score (GQS), the usefulness score, and a novel postoperation nutrition score (PONS). Results One hundred fourteen patients were included in the study. The mean duration and number of views were 12.51 min and 87,558.46, respectively. The DISCERN score, JAMA score, GQS, and usefulness score of the physicians or dietician-based videos were significantly higher than those of the patient-based videos (p < 0.001). Positive correlations were found between the VPI and view ratio, as well as between the duration and number of likes. Additionally, the DISCERN score was significant correlated with the duration and number of likes. Significantly positive correlations were found between the usefulness score and duration, usefulness score and number of likes, and PONS and duration (p < 0.01). Conclusions Informational videos on nutrition after bariatric surgery on YouTube (TM) are of low quality. Although the videos uploaded by physicians and dieticians have higher quality, only a few are available. Additionally, patients prefer to watch low-quality videos.
Citation Count: 6
Drawing Transmission Graphs for Covid-19 in the Perspective of Network Science
(Cambridge Univ Press, 2020) Gursakal, N.; Batmaz, B.; Aktuna, G.
When we consider a probability distribution about how many COVID-19-infected people will transmit the disease, two points become important. First, there could be super-spreaders in these distributions/networks and second, the Pareto principle could be valid in these distributions/networks regarding estimation that 20% of cases were responsible for 80% of local transmission. When we accept that these two points are valid, the distribution of transmission becomes a discrete Pareto distribution, which is a kind of power law. Having such a transmission distribution, then we can simulate COVID-19 networks and find super-spreaders using the centricity measurements in these networks. In this research, in the first we transformed a transmission distribution of statistics and epidemiology into a transmission network of network science and second we try to determine who the super-spreaders are by using this network and eigenvalue centrality measure. We underline that determination of transmission probability distribution is a very important point in the analysis of the epidemic and determining the precautions to be taken.
Citation Count: 4
Using Process Mining Approach for Machining Operations
(Springer Science and Business Media Deutschland GmbH, 2020) Altan, Z.; Birgün, S.
In the Industry 4.0 world, both service and manufacturing companies should review their systems and processes, remove any application that causes waste, ensure lean flow and change business models if necessary, in order to fulfill the requirements of this trend. Introducing Industry 4.0 on a problematic system or process might harm it enough to cause the company disappear instead of benefiting it. For applications correctly decided to be built upon a correct system, data flow must be accurate and timely. And at this stage, data amount that increases with process mining and complexity of the big data will be solved and more information will be obtained about real production processes and data. In this study, a prototype is developed using the data of a previously studied manufacturing research. This prototype handles only one phase of the manufacturing process and extracts all the initial possible pathways of this phase through process mining. © 2020, Springer Nature Switzerland AG.
Citation Count: 0
Effect of Body Size on Pulmonary Function in Male and Female Dancers
(Editura Universitatii din Pitesti, 2020) Tekin, Demet; Terapi ve Rehabilitasyon Bölümü
Introduction: Pulmonary function influence the performance of dancers during their trainings and also their performance stage. Therefore, it is important to investigate the factors that effects the pulmonary function. The effect of body size on resting pulmonary function in modern dancers is unknown but may be related to sex differences. Accordingly, the purpose of this study was to determine the effect of body size on resting pulmonary function in male and female modern dancers with the same training levels. Materials and Methods: Thirtyeight (n=18 male; n=20 female) undergraduate modern dancers participated voluntarily and their exercise levels (minimum of 5 days/week, 3 hours/day) and training histories (at least 4 years) were similar. All dancers completed pulmonary function test with a computerized spirometer (MIR, Spirobank, Rome, Italy) according to the American Thoracic Society (ATS) guidelines. Results: There was a significant difference (p < 0.05) between the genders in terms of vital capacity-best (VC-best) and maximum voluntary ventilation-best (MVV-best). The values were significantly higher in the male than in female dancers, and body size had a significant effect, with a small effect size (< 0.2) on the VC-best (F(1,25)= 4.902, p = 0.036) and MVV-best (F(1,25) = 7.864, p = 0.010) values. Conclusion: Although the effect size was small, the effects of body weight, height, and body mass index on the VC-best and MVV-best values were influenced by the fact that male dancers have higher resting respiratory function performance. In a practical contribution, the current results suggest that it is necessary to consider the gender factors when planning and organizing dance training with different models. © JPES.
Citation Count: 8
The Governance of Turkey's Cyberspace: Between Cyber Security and Information Security
(Routledge Journals, Taylor & Francis Ltd, 2020) Eldem, Tuba; Siyaset Bilimi ve Uluslararası İlişkiler Bölümü
This article explores Turkey's multifaceted cyberspace governance policy and argues that positioned between two opposites of cyberspace governance that has close military and security ties to the West, and domestic Internet policies more similar of Russia-China axis, Turkey should be considered as a swing state in global cyberspace governance debates. The article shows that despite her official discourse on multi-stakeholderism and its compliance with the emerging norms in the Euro-Atlantic alliance concerning cyber-security, cyber-crime, and cyber-defense; Turkey's domestic Internet policy converges towards the Russia-China axis characterized by the rise of information controls and increasing efforts to establish "digital sovereignty" to national cyber space.
Citation Count: 1
The Effects of Dietary Changes on Bone Markers in Postmenopausal Vertebral Osteopenia
(Churchill Livingstone, 2020) Garipağaoğlu Denizhan, Muazzez; Garipagaoglu, Muazzez; Bicer, H. Selcen; Kurtulus, Duygu; Ozturk, Mustafa; Gunes, F. Esra; Beslenme ve Diyetetik Bölümü
Background & aims: Nutrition is one of the most important environmental factors affecting the formation of osteopenia. The purpose of this study was to investigate the effects of dietary changes on bone formation and bone resorption markers of postmenopausal women with vertebral osteopenia. Methods: In this study, 108 women with postmenopausal vertebral osteopenia were included. Patients were observed for a month to identify their regular nutritional status. Before intervention, blood and urine samples were taken from all patients. Then, 2-day food consumption records were taken and the patients were divided into 4 groups. Different types of diets (opposite of their regular diets) were prepared for these groups (1: control, 2: reduced-carbohydrate, 3: reduced-protein, 4: reduced-sodium) and followed for 3 months. At the end of follow-ups, blood and urine samples were taken again and changes in osteocalcin (OC) and N-terminal telopeptide (NTX) levels were examined. Results: According to biochemical analysis, there was a significant decrease (p < 0,001) in OC levels in reduced protein group and an increase (p > 0,05) in reduced carbohydrate group. When NTX levels were assessed, a significant decrease (p < 0.001) in the reduced carbohydrate group and a significant increase in the reduced protein group (p < 0.05) were found. Conclusion: Our findings show that reduced carbohydrate diet protected whereas, reduced protein diet negatively affected bone health. Osteopenic individuals were thought to be able to improve bone health and their quality of life by early dietary intervention. (C) 2020 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
Citation Count: 1
Cold Chain Logistics Firm Selection by Using Ahp-Vikor Integrated Method and a Case Study in Food Industry
(Springer Science and Business Media Deutschland GmbH, 2020) Çaloğlu Büyükselçuk, Elif; Endüstri Mühendisliği Bölümü
With the Industry 4.0, a new trend has started for all sectors and enterprises have entered into a period of intense working and investment to turn into intelligent systems. Cold chain logistics also has the same trend, and companies have pushed the button to be involved in this process. Due to changing lifestyles and generally decreasing prices, the world market for perishable products such as processed foods and cooled products is growing. Cold chain transportation is an important issue in basic food and health product logistics to prevent the growth of harmful microorganisms and to ensure that the products remain intact. In this study, it is aimed to determine the right cold chain logistics firm for company EDB that is a small and medium-sized enterprise (SME) operating in the food industry. Firstly, the selection criteria are defined according to the literature survey and expert views. AHP approach has been used to calculate the weight of them. After the determination of weight of criteria, VIKOR approach has been used to identify the best cold chain logistics firm for company EDB. The results were obtained by using Expert Choice 11.0 and Excel calculator finally the best one has been determined. © 2020, Springer Nature Switzerland AG.
Citation Count: 6
Acute Changes in Electrophysiological Brain Dynamics in Elite Karate Players
(Springer international Publishing Ag, 2020) Balcıoğlu, Taylan Hayri; Balcioglu, Taylan Hayri; Ozcan Cakir, Canan Elif; Goksel Duru, Dilek; Antrenörlük Eğitimi Bölümü
Regular physical exercise has enhanced effects on the human anatomy and functionality. Recently, an effect of a single set of exercise is shown to have positive effects on mood and on cognitive functioning. The aim of this study is to investigate the effect of a single bout of moderate exercise on the brain electrophysiological dynamics in resting-state condition and under the mental workload situation from elite-level athletes. For this purpose, electroencephalogram (EEG) is measured before and after the exercise sessions from 17 elite karate players who are members of the national karate team of Turkey. Blood lactate measurements are implemented to monitor the volunteers before EEG measurements. EEG data are analyzed using three metrics: conventional band power of each electrode, coherence metrics between electrodes for each band and source coherence values corresponding to each frequency band. Each metric is statistically analyzed between pre- and post-values, and results revealed that in all frequency bands, right parietal electrode had increased connection values which are thought to be related to ongoing sympathetic nervous system response observed during the recovery period. Another finding is the enhanced connectivity of frontal sources under the resting state as well as during the increased mental workload periods.
Citation Count: 0
The Raid in the Editorial Office of the Turkish Newspaper Tan, 1945, and Its Impact on the State of Soviet-Turkish and Us Turkish Relations in the Post-Wwii Period
(Peoples Friendship Univ Russia, 2020) Sivis, Efe
The author examines the demonstrations carried out by university students in Istanbul on December 4, 1945 and the raid on the printing operations of the pro-Soviet 7an newspaper, known as the Tan Raid, in light of U.S. State Department documents, namely the related files in National Archives Records Administration. The influence of the Tan Raid on Turkey's international relations is discussed in the context of Turkish-American and Turkish-Soviet relations. The Raid is regarded as a significant incident since it coincides with the post WW2 period when Turkey's relations with the Soviet Union had already deteriorated due to Moscow's demands to revise the Montreux Convention by 19th of March 1945. Furthermore, Turkish-American diplomatic contacts in the aftermath of the Raid show Washington's perspective on policy towards Soviet Union, as U.S. officials advised a moderate line to their Turkish counterparts. On the other hand, preparations for the Raid seem highly controversial since Turkish government officials did not strongly condemn the event and the police did not intervene against the protestors despite of their violent actions towards Tan and some left leaning bookstores. The slogans during the demonstration show its anti-Soviet character, which Ankara denied in order to decrease tensions with the Soviets by arguing that it was Tan's owner, the Sertel couple to whom the anger was directed, not the Soviet Union. The intelligence obtained by diplomats at the U.S. Embassy in Ankara, the meetings they conducted with Turkish politicians, their conclusions regarding the process leading up to the raid, and their opinions on Turkish-Soviet relations provide the background for the analysis.

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