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Search Results: 1 - 10 of 391 matches for " Atilla Alpay "
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Comparing techniques for pterygium surgery
Atilla Alpay, Suat Hayri Ugurbas, Berktug Erdogan
Clinical Ophthalmology , 2009, DOI: http://dx.doi.org/10.2147/OPTH.S2767
Abstract: mparing techniques for pterygium surgery Original Research (7455) Total Article Views Authors: Atilla Alpay, Suat Hayri Ugurbas, Berktug Erdogan Published Date September 2008 Volume 2009:3 Pages 69 - 74 DOI: http://dx.doi.org/10.2147/OPTH.S2767 Atilla Alpay, Suat Hayri Ugurbas, Berktug Erdogan Department of Ophthalmology, Faculty of Medicine, Zonguldak, Karaelmas University, Zonguldak, Turkey Purpose: To compare various techniques of pterygium surgery including bare sclera, intraoperative mitomycin C application, conjunctival flap reconstruction, and conjunctival autografting technique. Methods: This study is designed to compare 4 currently used techniques in order to determine the complication and recurrence rates after pterygium exision. Included in the study were 77 eyes from 60 patients. Bare sclera technique was used to treat 21 primary pterygia; mitomycin C was used to treat 20 (16 primary, 4 recurrent) pterygia; 18 (17 primary, 1 recurrent) pterygia were treated by conjuntival flap reconstruction; and 18 (9 primary, 9 recurrent) pterygia were treated by conjunctival autografting technique. All patients who underwent surgery were followed up for between 6 months and 2 years. Results: Eight recurrences (38.09%) were observed in the bare sclera group whereas there were 5 (25%) recurrences in the mitomycin C group. In the conjunctival flap reconstruction group, 6 (33.33%) recurrences were detected. In the conjunctival autografting group, 3 recurrences were observed. There were no major complications threatening visual ability in the surgical patients. Conclusion: A comparison of the groups demonstrated that the recurrence rate was highest in the bare sclera group, and lowest in conjunctival autografting and mitomycin C treatment groups respectively. Although the conjunctival autografting technique is a more difficult and time consuming technique than the others, cosmetic and surgical results were found to be superior. We advise conjunctival autografting for the treatment of pterygium in view of the high recurrence rates of other techniques, and the possible complications of mitomycin C treatment for benign disease.
Comparing techniques for pterygium surgery
Atilla Alpay,Suat Hayri Ugurbas,Berktug Erdogan
Clinical Ophthalmology , 2008,
Abstract: Atilla Alpay, Suat Hayri Ugurbas, Berktug ErdoganDepartment of Ophthalmology, Faculty of Medicine, Zonguldak, Karaelmas University, Zonguldak, TurkeyPurpose: To compare various techniques of pterygium surgery including bare sclera, intraoperative mitomycin C application, conjunctival flap reconstruction, and conjunctival autografting technique.Methods: This study is designed to compare 4 currently used techniques in order to determine the complication and recurrence rates after pterygium exision. Included in the study were 77 eyes from 60 patients. Bare sclera technique was used to treat 21 primary pterygia; mitomycin C was used to treat 20 (16 primary, 4 recurrent) pterygia; 18 (17 primary, 1 recurrent) pterygia were treated by conjuntival flap reconstruction; and 18 (9 primary, 9 recurrent) pterygia were treated by conjunctival autografting technique. All patients who underwent surgery were followed up for between 6 months and 2 years.Results: Eight recurrences (38.09%) were observed in the bare sclera group whereas there were 5 (25%) recurrences in the mitomycin C group. In the conjunctival flap reconstruction group, 6 (33.33%) recurrences were detected. In the conjunctival autografting group, 3 recurrences were observed. There were no major complications threatening visual ability in the surgical patients.Conclusion: A comparison of the groups demonstrated that the recurrence rate was highest in the bare sclera group, and lowest in conjunctival autografting and mitomycin C treatment groups respectively. Although the conjunctival autografting technique is a more difficult and time consuming technique than the others, cosmetic and surgical results were found to be superior. We advise conjunctival autografting for the treatment of pterygium in view of the high recurrence rates of other techniques, and the possible complications of mitomycin C treatment for benign disease.Keywords: pterygium, comparing, techniques, mitomycin C
Effects of different priming treatments and priming durations on germination percentage of parsley (Petroselinum crispum L.) seeds  [PDF]
Atilla Dursun, Melek Ekinci
Agricultural Sciences (AS) , 2010, DOI: 10.4236/as.2010.11003
Abstract: The effects of different priming treatments and priming durations on germination percentage at different temperatures in parsley seeds were studied. The seeds were treated for 2, 4, 6 and 8 days with the PEG 6000 (–0.5 MPa, –1.0 MPa and –1.5 MPa), KNO3 (0.30 mol/L and 0.35 mol/L), Mannitol (0.50 mol/L and 0.60 mol/L) and hydropriming (12h, 24h, 36h and 48h) and unprimed (control). Germination studies were made at 5, 10, 15, 20 and 25°C. Percentage of germination at different temperatures was significantly affected by priming treatments. Hydropriming (12h, 24h and 36 h) and mannitol 0.60 mol/L at 2 day generally had the highest germination percentages. In general, the highest germination percentage with priming was determined at 10°C. It may be said that seed priming treatments increased seed germination percentage at both low and high temperatures. The highest germination percentages were observed in both hydropriming and mannitol treatments as compared with PEG and KNO3 treatments. The PEG and KNO3 (2 and 4 days) treatments were better than unprimed treatment in all of the temperatures.
A measure of graph vulnerability: scattering number
Alpay Kirlangi
International Journal of Mathematics and Mathematical Sciences , 2002, DOI: 10.1155/s0161171202012607
Abstract: The scattering number of a graph G, denoted sc(G), is defined by sc(G)=max{c(G−S)−|S|:S⫅V(G)    and   c(G−S)≠1} where c(G−S) denotes the number of components in G−S. It is one measure of graph vulnerability. In this paper, general results on the scattering number of a graph are considered. Firstly, some bounds on the scattering number are given. Further, scattering number of a binomial tree is calculated. Also several results are given about binomial trees and graph operations.
A DIFFERENT VOICE IN BALKAN DIALECTS BALKAN A IZLARINDA FARKLI B R F L ATISI
Alpay ?GC?
Turkish Studies , 2011,
Abstract: In written language of Turkey Turkish sample “anlat-” is “anlat r-” in Western Rumeli dialects. This different voice is formed with -(I4)t- and -(I4)r- suffixes. As a result of dialect scans, this type voice is being used in Western Rumeli dialects area. Area of this different voice contains Mitrovica, Vucitrn, Pristina, Mamusa, Prizren, Gnjilane in Kosova; Tetovo, Gostivar, Vrapciste, Skopje, Kumanovo, Konce, Bitola, Resen, Ohrid, Struga in Macedonia; Kostendil in Bulgaria. Türkiye Türk esi yaz dilinde “anlat-” rne indeki fiil at s Bat Rumeli a zlar nda “anlat r-” eklindedir. Farkl olan bu fiil at s , -(I4)t- ekinin yan na katmerli bir kullan m olarak -(I4)r- ekinin getirilmesiyle olu mu tur. Yap lan a z taramalar sonucunda, Balkanlardaki baz Türk a zlar nda g rülen farkl fiil at s n n Bat Rumeli a zlar b lgesinde topland g rülmü tür. Kosova’da Mitrovi a, V t r n, Pri tine, Mamu a, Prizren, Gilan; Makedonya’da Kalkandelen, Gostivar, Vrap i te, üsküp, Kumanova, Kon e, Manast r, Resne, Ohri, Struga; Bulgaristan’da K stendil, bu zelli in g rüldü ü b lge i indedir.
Supporting the Teaching Researcher
Esat Alpay
REDU : Revista de Docencia Universitaria , 2012,
Abstract: ABSTRACT Tensions between the research and teaching roles in university are well recognised. Past teacher training practices have only partially considered such issues and indeed the motivations, bias and priorities of the teaching researcher. This paper provides an overview of teacher training (content and process) that is suited for the research-focused environment. Particular attention is given to a training approach that has been recently adopted at Imperial College London. The approach involves practice-based and experiential learning, support and input from a broad community (e.g. peers, senior peers and education experts), clear discipline contextualisation and ownership, and emphasis on the potential parallels between teaching and research and the value of teaching to research. Furthermore, teaching practices that capitalise on researcher and institutional strengths are encouraged, and exemplified through the notion of research-supporting teaching. RESUMEN Respaldo al investigador que es también docente Las tensiones entre los roles investigadores y docentes en la universidad son de sobras conocidas. Hasta la fecha, la formación del profesorado sólo ha tenido en cuenta de forma parcial esta problemática, así como las motivaciones, predisposición y prioridades del investigador que es a la vez profesor. Este artículo ofrece una descripción general de la formación del profesorado (en cuanto a contenido y a proceso) adecuada a un entorno enfocado a la investigación. Concretamente se da información sobre el planteamiento de la formación adoptado recientemente por la universidad Imperial College London. Este enfoque incluye aprendizaje experiencial basado en la práctica, apoyo e input de una amplia comunidad (por ejemplo pares, pares sénior y expertos en educación), clara contextualización respecto a la disciplina y propiedad/interiorización, y énfasis en los potenciales paralelismos entre docencia e investigación así como el valor de la docencia para la investigación. Además, se promueven aquellas prácticas docentes que aprovechan el rol investigador y el potencial institucional, y se ejemplifican mediante la noción de docencia que respalda la investigación.
Complete fourier direct magnetic resonance imaging (CFD-MRI) for diffusion MRI
Alpay ?zcan
Frontiers in Integrative Neuroscience , 2013, DOI: 10.3389/fnint.2013.00018
Abstract: The foundation for an accurate and unifying Fourier-based theory of diffusion weighted magnetic resonance imaging (DW–MRI) is constructed by carefully re-examining the first principles of DW–MRI signal formation and deriving its mathematical model from scratch. The derivations are specifically obtained for DW–MRI signal by including all of its elements (e.g., imaging gradients) using complex values. Particle methods are utilized in contrast to conventional partial differential equations approach. The signal is shown to be the Fourier transform of the joint distribution of number of the magnetic moments (at a given location at the initial time) and magnetic moment displacement integrals. In effect, the k-space is augmented by three more dimensions, corresponding to the frequency variables dual to displacement integral vectors. The joint distribution function is recovered by applying the Fourier transform to the complete high-dimensional data set. In the process, to obtain a physically meaningful real valued distribution function, phase corrections are applied for the re-establishment of Hermitian symmetry in the signal. Consequently, the method is fully unconstrained and directly presents the distribution of displacement integrals without any assumptions such as symmetry or Markovian property. The joint distribution function is visualized with isosurfaces, which describe the displacement integrals, overlaid on the distribution map of the number of magnetic moments with low mobility. The model provides an accurate description of the molecular motion measurements via DW–MRI. The improvement of the characterization of tissue microstructure leads to a better localization, detection and assessment of biological properties such as white matter integrity. The results are demonstrated on the experimental data obtained from an ex vivo baboon brain.
Induction of Parturition in Cows with Misoprostol
Atilla Yildiz
Journal of Animal and Veterinary Advances , 2012,
Abstract: The purpose of this study, was to determine the efficacy of intravaginal misoprostol for induction of parturition in cows. Twenty-seven multiparous Holstein cows with singleton pregnancies were used in this experiment. As randomly, cows were assigned to 1 of 2 treatment groups (n = 9) and a control group (n = 9). On day 270 of gestation cows in the treatment groups were received 200 μg or 400 μg of misoprostol (cytotec ) intravaginally. Intravaginal misoprostol was given every 6 h until the onset of labour. A maximum of 6 doses was administered. The average gestation length in control cows was 281 days. All induced cows (except for one cow administered 400 μg misoprostol) calved between 24 and 72 h after administered misoprostol. The 400 μg dosage of misoprostol resulted in induction failures of 11.1%. The rate of placental retention, birth weights, calving difficulty and calf viability did not differ among groups. Vaginal administration of misoprostol is an effective method of inducing parturition in the cow. Misoprostol could be used to produce a predictable calving time.
Effect of Administering Ovsynch Protocol Plus Postbreeding Infusionon First Service Pregnancy Outcome in Cows
Atilla Yildiz
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2010.1345.1350
Abstract: The objectives were to determine the effect of ovsynch plus postbreeding infusion treatment combined with fixed time AI on pregnancy rate in healthy Holstein cows. A total of 36 cows ageing between three and eight were used. Cows were were randomly assigned to one of three treatment groups. Cows (n = 12) in first group (control) received no treatment; they were managed as healthy cows and inseminated at the first estrus after the voluntary waiting period. Second group (n = 12) received ovsynch protocol. Ovsynch protocol included administration of GnRH (2.5 mL im, Receptalfi, 0.004 mg Buserelin mL-1, Intervet) on day1, administration of PGF2α analogse D-Cloprostenol (2 mL im, Dalmazin, 0.075 mg D-Cloprostenol mL-1, Veta ) on day 8 and second GnRH administration on day 10. Animals in this group were artificially inseminated 18 h following 2nd GnRH administration. Third group (n = 12) received ovsynch but with the addition of 500 mg of Gentamycin sulphate (10 mL added to 30 mL of saline iu, Gentavet, 50 mg Gentamycin sulphate mL, Veta ) in 30 mL of saline by intrauterine infusion 2 h after artificial insemination. Pregnancy diagnosis was performed via rectal palpation 45 days post insemination. Pregnancy rate in the cows that received Ovsynch + Postbreeding infusion was higher (p<0.05) than that of cows synchronized with ovsynch. Based on the odds ratio, pregnancy rate for cows treated with Ovsynch + Postbreeding infusion increased 2.8 folds (Odds Ratio (OR): 2.80 (0,532-14,7355) 95% Confidence Interval (CI)) when was compared with control group and 6 folds (OR: 6.00 (1.0177-35.3753) 95% CI) when was compared with ovsynch group. The results of these studies indicate that acceptable pregnancy rates can be achieved in the recipients that have received the ovsynch plus postbreeding infusion protocol without the necessity of estrus detection.
On the Indian Crested Porcupine, Hystrix indica (Kerr, 1792) in Turkey (Mammalia: Rodentia)
Atilla Arslan
Pakistan Journal of Biological Sciences , 2008,
Abstract: This study presents some data about ecological, biological and taxonomical characteristics of Hystrix indica (Kerr, 1792) from Turkey. For this purpose characteristics of burrow, skull, tooth and measurements of external and cranial characters of two female H. indica from Turkey were investigated. It was concluded that our specimens are between the Middle East and Indian sub-region specimens in terms of morphometrical. It was also determined that there were roots in stomach contents of specimens.
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