TR Dizin İndeksli Yayınlar / TR Dizin Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14517/20

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An approach to improve the performance of cooperative unmanned vehicle team
(Tubitak Scientific & Technological Research Council Turkey, 2019) Kivanc, Omer Cihan
In this paper, a method based on optimal energy management is proposed in order to improve the operational and tactical abilities of collaborative unmanned vehicle teams. Collaborative unmanned systems are used in surveillance, tracking, and military operations. The optimal assignment of these tasks requires cooperation among the vehicles in order to generate a strategy that is efficient with respect to overall mission duration and satisfies all problem constraints. The key motivation behind this paper is to design an unmanned vehicle team that mitigates the disadvantages caused by the structures and characteristics of unmanned ground vehicles (UGVs) and unmanned aerial vehicles (UAVs), which are used in these systems. The design steps of the developed system are explained in three sections in a multidisciplinary fashion. In the first section, the optimal energy consumption profile is estimated by simulating the UAV's flight on a Nvidia Jetson TX2 embedded system, located on the UGV. In the second section, a UAV charger design and implementation is done via development of a TMS320F28335 DSP controlled 65 W inductive wireless power transfer circuit, and in the third section an algorithm that calculates the optimal range and route for the user-selected way points using the state of charge of the UAV's LiPo batteries and a preflight simulation using the simulated annealing method are developed. The experiments are performed in real time with an example scenario and the proposed strategy's suitability and effectiveness are verified for cooperative unmanned vehicle teams.
Can Rectal Indomethacin Be an Alternative Local Anesthetic Method to Intrauterine Lidocaine During Endometrial Biopsy? A Clinical Observational Prospective Study
(Turkiye Klinikleri, 2020) Demircan Karadag, Sinem; Karadag, Cihan; Senturk, Mehmet Baki; Turgut, Abdulkadir
Objective: Endometrial biopsy is a pain-related gynecological procedure. The aim of this study is to compare the efficacy of rectal indomethacin and intrauterine lidocaine on pain control during endometrial sampling. Material and Methods: This clinical observational prospective trial was conducted in 120 patients with the complaint of abnormal uterine bleeding who presented at Istanbul Medeniyet University Goztepe Training and Research Hospital, Obstetrics and Gynecology Department, between January 2017 and June 2017. Patients were divided into two groups. The rectal group had 64 patients, to whom indomethacin was given as a local anesthetic. The intrauterine group had 56 patients, for whom lidocaine was the local anesthetic used. Endometrial biopsy was performed by using a no. 4 Karman cannula. The primary goal of measurement was pain intensity assessed by a visual analog scale before, during, and 10 minutes after the procedure. Results: There were no statistically significant differences between the two groups in mean age, body mass index, weight and median levels of gravidity, parity and abortion. The median pain scores of the two groups during and 10 minutes after the procedure were similar (p>0.05). Conclusion: In this study, rectal indomethacin was shown to be equal to intrauterine anesthesia for reducing pain during the endometrial biopsy. Rectal indomethacin may be an alternative drug to relieve pain during gynecological procedures. Further researches with larger numbers of patients are needed to confirm our findings.
Castleman's disease presenting with mechanical intestinal obstruction: A rare case
(Turkish Assoc Trauma Emergency Surgery, 2020) Kartal, Abdulcabbar; Atli, Eray; Vural, Gurcan; Ferhatoglu, Murat Ferhat; Filiz, Ali Ilker
Castleman's disease (CD) is a lymphoproliferative disorder and the occurrence of CD in the small bowel is rare. In this study, we present one case of CD causing mechanical intestinal obstruction due to involvement of terminal ileum. A 50-year-old man was admitted to the hospital with signs and symptoms of mechanical intestinal obstruction without history previous surgery.After examination and obtaining abdominal computed tomography, diagnosis of mechanical intestinal obstruction was reached and emergency surgery was performed with a median incision. On abdominal exploration a tumor like mass that also held distal small intestine mesentery, and ileocecal valve causing complet intestinal obstruction was observed. Ileocecal resection and ileocolonic anastomosis were performed. CD is a rare entity and should be kept in mind during the differential diagnosis of mechanical intestinal obstruction provided that wall thickening in terminal ileum mimicking mass, and accompanying enlargement mesenteric lymph nodes observed during preoperative investigations or intraoperative exploration.
The classical adiabatic constancy of PVγ for an ideal gas, can be shown to be a quantum mechanical occurrence, which yields the particular value of the constant, in question
(2012) Yarman,T.; Kholmetskii,A.L.; Korfali,O.
In this paper we find a full connection between the long lasting macroscopic classical laws of gases and the quantum mechanical description of non-interacting particles confined in a box, thus constituting an ideal gas. In such a gas, the motion of each individual molecule can be considered to be independent of all other molecules, and the macroscopic parameters of an ideal gas, mainly, pressure P and temperature T, can be defined as simple average quantities based on individual motions of all molecules in consideration. It is shown that for an ideal gas enclosed in a macroscopic cubic box of volume V, an alphanumeric expression for the Constant appearing in the classical law of adiabatic expansion law, i.e. PV5/3 = Constant, can be derived based on quantum mechanics. Note that this constant has otherwise remained for centuries, as just an abstract quantity in the form of P1V 15/3=P2V25/3 = P 3V35/3 written for different thermodynamic states, delineated through an adiabatic transformation. No one even seems to have thought that it may eventually have a particular expression. Physical implications of the result we disclose are discussed. © 2012 TIBTD Printed in Turkey.
Clinicopathologic and prognostic features in appendiceal malignancies: does tumor invasiveness matter?
(Turkish Surgical Assoc, 2019) Senolu, Kazim; Ferhatoglu, Murat Ferhat; Tihan, Deniz
Objective: To evaluate the survival rates of appendiceal tumors and prognostic factors affecting survival. Material and Methods: Demographic features, tumor characteristics and pre- and post-operative outcomes of the patients were analyzed retrospectively. The study was performed according to the Helsinki declaration. Results: Twenty-three of the 2840 specimens were investigated prospectively. Median age of the patients was 28 (range: 1-89) years, with a male (n=1730, 60.9%) to female (n=1110, 39.1%) ratio of 1.55. Pediatric group did not present appendiceal malignancy. Carcinoid tumors were reported in 17 (0.59%) and adenocarcinoma was reported in 6 (0.20%) patients. Multivariate analyses of the subtypes showed serosal invasion as an independent risk factor for mucinous and non-mucinous adenocarcinoma (HR: -2.70, 95% CI: 0.006-0.755, p=0.029). Median follow-up time was 48 months (range: 28-61 months) and disease specific survival rates of carcinoid tumors, mucinous- and non-mucinous adenocarcinomas were 36(95% CI 32-40), 30 (95% CI 13-46), 43 (95% CI 30-55) months, respectively (p=0.749). Factors affecting survival in the univariate analyses were advanced tumor stage, serosal invasion and tumor invasion depth. In multivariate analyses, tumor invasion depth was the only independent prognostic factor with poor survival rates in all subtypes of appendiceal malignancies (HR=1.31 (95% CI: 1.01-13.5), p=0.047). Conclusion: Tumor subtype and tumor invasiveness are important risk factors for survival. Besides other treatment modalities, appendectomy still remains the survival benefit with better clinical outcomes.
Design and Implementation of an Electric Actuated Valve for Precise Fluid Control
(Gazi Univ, 2019) Kivanc, Omer Cihan; Ustun, Ozgur; Tosun, Gurkan; Oguz, Ender; Mutlu, Yasar
Fluid control is one of the essential automation application area in industry. In order to fluid control effectively and precisely, valves which are crucial components, need a controlled rotating motion which leads to implement electric motors, electronic controller and gear systems altogether. In this study, an electric motor actuated valve system is designed and prototyped. The design phases are including switch mode power supply (SMPS) design, motor controller circuit design, mechanical implementation and controller design. The designed valve system is manufactured and tested using multi-disciplinary fashion. The application problems are solved by using the proper control techniques and strategies. The precise position control of butterfly disc is also achieved. According to the related industrial standard and application requirements, the experimental results show the effectiveness of the design approach.
The Effect of Drama on the Creative Imagination of Children in Different Age Groups
(Hacettepe Univ, 2013) Gundogan, Aysun; Ari, Meziyet; Gonen, Mubeccel
Imagination is necessary for creative ideas to emerge. The creative imagination can be developed by suitable education programs especially by drama programs with suitable activities. This article presents findings on whether the effect of drama on the creative imagination of children in different age groups differentiate or not. The experiment group of this research is comprised of 60 children (30 from the age group of 10, 30 from the age group of 13) from a regular primary school and the control group is comprised of 60 children (30 from the age group of 10, 30 from the age group of 13) from another primary school both with the equal socio-economic background in order to avoid children effect each other. The drama program was implemented to the experiment group of both age groups separately as 48 hours in a week. However, this program was not implemented to the control group. The Kujawski Creative Imagination Test was used as the measurement instrument. For analysis of the data, the independent samples t test and paired samples t test were utilized. From the results of the creative imagination test applied before and after the drama, it was shown that a drama program has a positive effect on development of the creative imagination of children. When the effects of drama in different age groups is examined, the prepared drama program is more effective on 10 year old children than 13 year old children.
The Effect of Perceived Benefit on Consumer Based Brand Equity in Online Shopping Context
(Ege Univ, Fac Economics & Admin Sciences, 2018) Guclu Sozer, Edin; Civelek, Mustafa Emre
The perception of consumers related to the benefits of using online channels for shopping is an important factor in the determination of their intention to shop online. This study aims to contribute to the current literature by (1) shedding light into the nature and extent of the relationship between perceived benefit and consumer based brand equity in an online context, (2) exploring the relationship between the sub-dimensions of consumer based brand equity, and finally (3) proposing and testing a structural model of these relationships between perceived benefit, consumer based brand equity and its sub-dimensions. The results of the study confirm that consumers' benefit perception related to online shopping leads the way to the formation of consumer based brand equity by affecting brand awareness and mediating the relationship between brand awareness and perceived quality. Another finding of this study is that there is a positive relationship within the sub-dimensions of consumer based brand equity in a sequential structure, which brings consumers from the basic awareness level about the brand to the formation of brand associations, as well as the perception of quality and consequently resulting to support the level of loyalty through brand associations.
Generalized Lorentz Group of Space-Time Transformations
(Turkic World Mathematical Soc, 2020) Yarman, Tolga; Altintas, Azmi A.; Kholmetskii, Alexander L.; Arik, Metin; Marchal, Christian B.; Yarman, Ozan; Ozaydin, Fatih
We examine how Lorentz Symmetry (LS) breaks down in Yarman-Arik-Kholmetskii (YARK) theory of gravitation through an entirely different mechanism than that under metric theories of gravity. Said mechanism can be right away extended to all other fields of interaction under Yarman's Approach that forms the basis of YARK theory. The result is the disclosure of a new "Generalized Lorentz Group" of space-time transformations which contains an additional parameter denoting the interactional energy per unit mass. Hence, the core finding herein is that the Minkowskian metric for an empty space-time should, when one is in the presence of gravity or any other force field, be replaced by general equalities involving a novel coupling parameter for either attraction or repulsion..
Image Processing and Analysis in Health: Advantages, Challenges, Threats and Examples;
(AVES, 2020) Ince,O.; Senel,I.K.; Yilmaz,F.
With the rapid development of technology, new methods and techniques have begun to provide many services. As these developments afford convenience in many ways, they have become an indispensable part of daily life. In addition, these developments have brought a different perspective to research and development activities. The healthcare sector has also been affected due to the use of new devices and methods. In particular, the development of information systems in digitalization and advancement in imaging technologies has paved the way for more frequent use of computer-based methods in healthcare. The most important advantages of these techniques are saving time and cost, creating new opportunities for diagnosis, and providing different opportunities in the treatment process. One of the methods used in healthcare services is the image processing technique, which is a method used in computer sciences. Image processing is defined as computer studies being carried out to obtain information from digital image data in a digital environment according to the targeted situation, which can be applied in many fields in healthcare services. In this research, relevant studies in the literature have been summarized to give an overview about image processing techniques, which have a wide application area from ophthalmology to radiology. For this purpose, contributions, challenges, and threats of image processing to healthcare services have been discussed and examples from the literature have been cited. Finally, some suggestions have been given after considering the studies in the literature and the technological changes that may occur in future @ Archives of Health Science and Research.All rights reserved.
Investigation of structural performances of historical building elements made with local materials using the finite element method
(Tulpar Academic Publishing, 2024) Zardari,S.; Kutlu,İ.; Nayeb,A.
The structural performance of the materials used in historical buildings can be damaged, usually due to natural events or human-induced interference. Historical buildings in the Southeastern Anatolia Region were generally built with local materials such as stone and brick. This situation should be seen as a factor that may cause severe structural damage in buildings located on a regionally active fault line. Within the scope of the study, the materials used in the region were discussed, and a numerical model representing the behavior of the materials against an earthquake that could occur on the fault line was used. Stone, brick and concrete material definitions were made for the prototype of the arch form modeled with SAP2000, and time-history analyses were carried out separately for each material. Concrete material behaviors, frequently used in buildings constructed today, are also included in the analysis for comparison. As a result of the study, it has been observed that local materials do not have sufficient tensile strength against earthquakes compared to concrete material and that the structures may face the risk of collapse in case of seismic movements in the region. © 2024 by the Authors.
Knowledge, attitude and practice of family physicians on antimicrobial therapy for acute respiratory tract infections-a study from istanbul, turkey
(Eurasian Society of Family Medicine, 2021) Ozturk,G.Z.; Toprak,D.; Sagsoz,O.; Ardic,C.
Aim: We aimed to investigate the knowledge, attitude, practice of family physicians regarding an-timicrobial therapy in acute respiratory tract infections. Methods: After receiving the ethics committee approval, the data were collected by online questionnaire from a phone application with 304 physicians. Questions about socio-demographic features and knowledge, attitude, and practices on antibiotics use were asked. Using SPSS, we did the statistical analyses with appropriate procedures. Results: Among the participants, 127 (41.8%) were specialists, and 177 (58.2%) were gen-eral practitioners. The specialists gave correct answers about tonsillopharyngitis and bron-chiolitis significantly more often than the general practitioners did. The antibiotic choices for acute otitis media were not in compliance with the guidelines of the Centers for Disease Control, and between the groups, there was no significant difference in terms of initial antibiotic choice. The self-reported antibiotic prescription rate was 25%. In 10%, the most common perceived reason for inappropriate antibiotic prescription was pressure from patients. Conclusion: There remains considerable misuse of antibiotics by primary care physicians for acute respiratory tract infections. Education of physicians and patients regarding acute respiratory tract infections may be needed to lower the rate of inappropriate antibiotic pre-scriptions. © 2021, Eurasian Society of Family Medicine. All rights reserved.
Replica bias circuit for common-source amplifier
(Tubitak Scientific & Technological Research Council Turkey, 2020) Kelleci, Burak
A replica bias circuit to set the current of common-source amplifier to reduce the gain variations across process, voltage, and temperature (PVT) changes is proposed. The gain of a common-source amplifier is set by the load resistor and transistor transconductance which is set proportional to a resistor using a constant-gm bias circuit. The success of constant-gm biasing depends on the accuracy of copying of generated current to the transistor. The leakage current at the transistor gate due to the electrostatic discharge protection diodes prevents the matching of the common source transistor current to the constant-gm circuit current. A low-power replica of the common-source amplifier is used to determine the current error which is minimized using a feedback circuit. Corner simulations indicate that gain variation across PVT reduced to +/- 1.9 dB using the proposed biasing method as opposed to +/- 9.9 dB for traditional biasing method for 1 mu A leakage current. Monte Carlo simulations with process and mismatch indicate that the standard deviation of the gain is reduced to 0.34 dB from 3.57 dB.
Revisiting the Concept of Gender through Psychodrama in University Students
(Cukurova Univ, 2021) Parlak, Simel; Camas, Guliz Gulcin
The purpose of this study is to raise the awareness among the university students on gender equality/inequality through psychodrama group work. In the study, the effect of psychodrama group work about gender equality on perception and attitude towards gender equality was tested with the one group pretest-posttest experimental model. The study was conducted with 12 volunteer individuals aged 18 years old who did not participate in the gender equality group study. As data collection tools, Perception of Gender Scale (Altinova & Duyan, 2013), socio-demographic information form, a qualitative question and a process analysis conducted after each session were used. Statistical analysis was performed in SPSS 15.0 and it was found that group work with psychodrama method led to a significant increase in the participants' gender perception scores. In the content analysis of the qualitative stage, it is established that the responses of the participants were gathered in equal and not equal themes. In addition to raising awareness of gender roles, the group work motivates the changes these of role patterns.
Test of creative imagination: Validity and reliability study;
(2013) Gündoǧan,A.; Ari,M.; Gönen,M.; Çocuk Gelişimi / Child Development
The purpose of this study was to investigate validity and reliability of the test of creative imagination. This study was conducted with the participation of 1000 children, aged between 9-14 and were studying in six primary schools in the city center of Denizli Province, chosen by cluster ratio sampling. In the study, it was revealed that the Pearson correlation coefficient between judges varied between 0.24-0.55. Kendall's coefficient of concordance was calculated as 0.44; the reliability coefficient, calculated by variance analysis is 0.76. As the result of applying the known-groups technique on the validity studies of the test measurements, while a significant difference was found between the first group comprised by the age group of 7-8-9 and second group comprised by the age group of 10-11 in Fluency sub-scale, no significant difference was found among the groups in Originality sub-scale. In Elaboration and Transformativeness sub-scale of the test, it was found that the number of the shapes used gradually increased with the increasing age. In this study, the validity and the reliability of the creative imagination test measurements were determined to be sufficient. © 2013 Educational Consultancy and Research Center.
The Turkish Version of the Munich Eating and Feeding Disorder Questionnaire: factor structure, validity, and reliability
(Cumhuriyet Univ Tip Fak Psikiyatri Anabilim Dali, 2020) Ongun Yilmaz, Hande
Objective: This research aims to examine the factor structure, validity, and reliability of the Munich Eating and Feeding Disorder Questionnaire (Munich ED-Quest) in Turkish, which is a new detailed self-rating scale developed for the assessment of eating and feeding disorders. Methods: The English version of the Munich ED-Quest was translated into Turkish using the back-translation technique. Five hundred thirty-four (461 females, 73 males) students studying at the Faculty of Health Sciences in a Turkish university whose age average was 23.0 +/- 3.0 years completed the Munich ED-Quest and the Eating Attitude Test (EAT). One hundred seventy-four of the participants completed the questionnaire again for the test-retest reliability within one week following the first conduct. Results: Factor analysis supported the three-factor structure of the Munich ED-Quest. The total Cronbach's alpha value was 0.940 (95% CI: 0.753-0.936 for the three subscales), and the test-retest reliability was 0.923 (95% CI: 0.755-0.906 for the three subscales) (all p<0.001) for the present time. The positive directional moderate correlation amongst the total points of Munich ED-Quest and EAT points supports the concurrent validity. Conclusion: This research reveals that the Turkish version of Munich ED-Quest is an acceptable, valid, and reliable scale for the investigation of eating disorders among the young Turkish population.

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