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Search Results: 1 - 10 of 1833 matches for " Murat Yigiter "
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Annular Pancreas in Children: A Decade of Experience
Murat Yigiter,Abdullah Yildiz,Binali Firinci,Onur Yalcin
Eurasian Journal of Medicine , 2010,
Abstract: Objective: Annular pancreas is an uncommon cause of duodenal obstruction in children. In this study, the clinical, radiological, and prognostic findings related to this disorder over a 12-year review period were analyzed.Materials and Methods: A retrospective review of 22 patients with annular pancreas who were treated with surgical repair between April 1998 and February 2010 was performed at two different pediatric surgical units. Presenting symptoms, associated anomalies, radiological findings, the type of surgery performed, postoperative outcomes, and complications were analyzed.Results: Twenty-two patients were identified. Thirteen of the 22 patients (59.1%) were born prematurely, 11 patients (50%) had low birth weight, 2 patients (9.1%) had very low birth weight and 1 patient (4.5%) had extremely low birth weight. The mean birth weight was 2285.23±675.12 g. (970-3300). All patients presented with vomiting, which was bilious in nine (40.9%). Nine patients (40.9%) had chromosomal anomalies. Corrective surgery consisted of duodenoduodenostomy in 9 patients (40.9 %), duodenojejunostomy in 9 patients (40.9%), and gastrojejunostomy in 4 patients (18.1%). Fourteen of the 22 patients have survived (63.6%). The causes of death were combinations of sepsis, pneumonia, brain hemorrhage, and cardiac anomaly. Conclusion: Infants with annular pancreas associated with duodenal obstruction were often born prematurely and/or had low birth weights; many had cardiovascular anomalies. Annular pancreas associated with duodenal obstruction correlated strongly with the trisomy 21 karyotype among the chromosomal anomalies, as did duodenal atresia. The oral feeding tolerance time was nearly the same for all patients regardless of the surgical procedure used.
The Effect of Students’ Learning Styles to Their Academic Success  [PDF]
Murat Gokalp
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.410090
Abstract: This study was aimed to evaluate the learning styles of education faculty students and to determine the effect of their success and relationship between their learning styles and academic success. The popula- tion of this study is comprised of the students of Education Faculty in 19 May University and the sample includes 140: 68 art, 72 pre-school teacher department students. Depending on the results obtained from pre-test, it was aimed to improve students’ knowledge and skills in studying. There was a significant dif- ference between the scores of pre- and post-tests. The significant relationship between the scores of post-test and the student success revealed that they learned how to study effectively. The validity and re- liability of the test were determined by considering the Cronbach alpha coefficients for each and all of the items. The study has found statistically significant differences between the results of the first and final applications of the subtests on learning styles and academic success; those subtests covered the items as learning, planned study, effective reading, listening, writing, note taking, using the library, getting pre- pared for and taking exams, class participation and motivation.
Extension of Kerberos with X.509 and Integration of Elliptic Curve Cryptography in Authentication  [PDF]
Murat Akkaya
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2016, DOI: 10.4236/ijcns.2016.912046
Abstract: Kerberos is one of the solutions for network security problems since it provides strong secret key cryptography over the insecure networks. Through the Kerberos authentication protocol, a client can prove its identity to a server (and vice versa) across an insecure network connection such as on Internet. In this comparative research paper, the Kerberos authentication protocol is extended and strengthened using x.509 with the integration of newer authentication system which is compared with previous authentication systems. In addition to this, RSA encryption mechanism used to provide authentication and security for the most communication systems replaced with Elliptic Curve Cryptography (ECC) encryption in Kerberos during authentication progress through simulation to expose possible efficient alternatives for key generation and to enhance security.
The Effects of Objects-First and Objects-Late Methods on Achievements of OOP Learners  [PDF]
Murat Pasa Uysal
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.510094
Abstract: Our research explored the effects of objects-first and objects-late methods on achievements of object-oriented pro-gramming (OOP) learners during a graduate course. The course’s scope was virtually identical for two groups, but the structure of the contents differed in sequence. The objects-first method emphasized the design and discussion of the object-oriented concepts from the very beginning while the objects-late deferred these concepts to the late lectures. The objects-first learners used all visual functionalities of BlueJ IDE. However, the objects-late learners started with only the text-based interfaces of BlueJ and they benefited its visual support in the last lectures. At the end of the study, we found that there was a statistically significant difference between OOP learner groups.
Fault Tolerance Mechanisms in Distributed Systems  [PDF]
Arif Sari, Murat Akkaya
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.812042
Abstract: The use of technology has increased vastly and today computer systems are interconnected via different communication medium. The use of distributed systems in our day to day activities has solely improved with data distributions. This is because distributed systems enable nodes to organise and allow their resources to be used among the connected systems or devices that make people to be integrated with geographically distributed computing facilities. The distributed systems may lead to lack of service availability due to multiple system failures on multiple failure points. This article highlights the different fault tolerance mechanism in distributed systems used to prevent multiple system failures on multiple failure points by considering replication, high redundancy and high availability of the distributed services.
Security and Optimization Challenges of Green Data Centers  [PDF]
Arif Sari, Murat Akkaya
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.812044
Abstract: Energy consumption in data centers has grown out of proportion in regard to the state of energy that’s available in the universe. Technology has improved services and its application. The need for eco-friendly energy and increase in data centers performance brought about Green Computing into the energy consumption of data centers. Information technology has grown and eaten deep into the society that almost all the sectors if not all are dependent on information technology to move on. The consumption of power has increased greatly. In this research paper the techniques for optimizing energy in data centers for Green Computing would be discussed. This study intends to expose the limitations of existing security solutions for securing data centers by taking into consideration of limitations of existing security frameworks that cannot enhance the security of data centers.
The Investigation of Jordanian Education Ministry Employees’ Attitude toward the Using of Cloud ERP  [PDF]
Hassan Alhanatleh, Murat Akkaya
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2016, DOI: 10.4236/ijcns.2016.911036
Abstract: ERP systems have become an optimal solution for companies to perform their works with maximum advantages of Enterprise Resources Planning (ERP). Moreover, even though the cloud computing has many obstacles which need to be solved, but the enterprises always embrace the cloud. Many enterprises tend to adopt the cloud computing paradigm in order to get its leverage in successful and benefits. With the development of cloud computing technology, there is a growing orientation to move the ERP from inside boundaries of organizations into the cloud computing technologies. In addition, there were many studies that covered the cloud ERP without concentrating on acceptance the end user for this technology. Thus, this study comes to increase the understanding the attitude of the end user for cloud ERP technology. The main aim of this study is to investigate the employees’ attitude towards use of cloud ERP. The conceptual research framework of cloud ERP is prepared based on the technology acceptance model (TAM). The employees of Queen Rania Center (QRC) in Jordanian Education Ministry used the cloud ERP system which implemented according to this study. The questionnaires are distributed online to the sample. The results indicate that the QRC employees enjoyed using the cloud ERP system.
Antioxidant, Antimicrobial, Cytotoxic, Larvicidal and Anthelmintic Activities and Phenolic Contents of Cyclamen alpinum  [PDF]
Murat Turan, Ramazan Mammadov
Pharmacology & Pharmacy (PP) , 2018, DOI: 10.4236/pp.2018.94008
Abstract: In this study, antioxidant, cytotoxic, larvicidal, antimicrobial and anthelmintic effects and phenolic contents of ethanol, methanol and acetone extracts of leaf and tuber parts of Cyclamen alpinum were investigated. DPPH, ABTS, β-carotene assays were carried out in antioxidant activity and total phenolic and flavonoid contents were tested in determination assay. 9 phenolic contents were determined by HPLC. Artemia salina was used in the cytotoxic effect. Larvicidal effect was investigated against Culex pipiens. Disc diffusion method was used in antimicrobial effect. The tuber part was found to be more toxic than the leaf part in the anthelmintic activity assay. The highest value obtained from the antioxidant activity experiment was observed with value of 86.73 ± 0.16 (%) in DPPH assay. The lowest LC50 value in larvicidal effect was determined 0.151 mg/mL after 72 hours. Consequently, there is need for further studies on the Cyclamen alpinum, which has the ability to fight against diseases such as cancer, cardiovascular diseases, etc.
Effects of Adding Boron Compounds to Glycol Based Grinding Aids on Cement Compressive Strengths Performance  [PDF]
Murat ?all?, Erol Pehlivan
Open Journal of Civil Engineering (OJCE) , 2019, DOI: 10.4236/ojce.2019.91003
Abstract: In this study, the effect of substituting boron compounds with glycol-based grinding aids to the compressive strength performances of cement was investigated. Monoethylene glycol (MEG) and diethylene glycol (DEG) were used as glycol-based grinding aids, and anhydrous borax and boric acid were used as boron compounds in the tests. CEM I type cement production was carried out with the addition of grinding aid mixtures to Portland clinker and some gypsum in the experiments. All produced cement samples were tested for Blaine fineness, xrf elemental analysis and 2, 7 and 28 days compressive strength tests. Test results of grinding aids of MEG and boron compounds mixture showed no increase in any age of compressive strengths performances related to MEG used itself. However, with the addition of boron compounds to DEG increased grinding aid performance at all ages (2, 7 and 28 days). Possible reasons for this increase could be borate esters formed with DEG and boric acid in a basic medium.
Recent promising technological developments on hearing restoration  [PDF]
Murat Haluk Ozkul, Tarik Ozkul
Journal of Biomedical Science and Engineering (JBiSE) , 2011, DOI: 10.4236/jbise.2011.43022
Abstract: The purpose of this paper is to review some of the promising technological developments related to hearing restoration part of ENT practice. If success-fully implemented in product or procedure form, these technologies are likely to simplify surgical pro-cedures related to hearing restoration and improve the condition of patients. The developments are com-piled from scientific sources as well as from recent patent documents and they are not yet commercially available.
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