oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 586 )

2018 ( 817 )

2017 ( 752 )

2016 ( 1105 )

Custom range...

Search Results: 1 - 10 of 461824 matches for " A. Caliskan "
All listed articles are free for downloading (OA Articles)
Page 1 /461824
Display every page Item
The Lie Brackets on Time Scales
H. Kusak,A. Caliskan
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/303706
Abstract: The Lie derivative, which has a wide range of application in physics and geometry, is trying to be examined on time scales. Firstly, nabla Lie bracket is defined on two-dimensional time scales. Secondly, the nabla Lie multiplication and some properties are given on the time scales. Lastly, for analyzing the differences between the real Lie multiplication and the nabla Lie multiplication, a numerical example is given.
Yield and Fruit Characteristics of Various Apricot Cultivars under Subtropical Climate Conditions of the Mediterranean Region in Turkey
A. Aytekin Polat,Oguzhan Caliskan
International Journal of Agronomy , 2013, DOI: 10.1155/2013/687345
Abstract: Seven apricot cultivars (“Beliana,” “Canino,” “Precoce de Colomer,” “Feriana,” “Rouge de Sernhac,” “Tokalo?lu,” and “Macar”) were evaluated at the experimental orchard of the Department of Horticulture, Faculty of Agriculture, Mustafa Kemal University, Hatay, Turkey. Phenological and pomological characteristics such as flowering period, average fruit weight, yield, fruit dimensions, flesh/seed ratio, acidity, and total soluble solids (TSSs) were examined. In addition, yield parameters of the cultivars were evaluated. Over four years, the highest average fruit weight was obtained from “Rouge de Sernhac” (37.9?g), while “Feriana” had the lowest (30.9?g). The flesh/seed ratio was the highest in the “Canino” (16.8). “Canino” had the highest TSS content with 14.5%, whereas “Beliana” had the lowest TSS value with 10.6%. “Beliana” and “Feriana” ripened the earliest (May 20) while “Precoce de Colomer” ripened latest (June 7). The average yield was highest on “Rouge de Sernhac” (41.2?kg/tree). “Beliana” and “Feriana” cultivars are recommended for precocity, and “Rouge de Sernhac” and “Tokalo?lu” for middle season in D?rtyol, Turkey. 1. Introduction More than 80% of apricot (Prunus armeniaca L.) production comes from the Mediterranean area and is concentrated in a period of 30–40 days, mostly in June [1]. Turkey is the world’s largest producing country of both fresh and dried apricot. Apricots are grown in almost all parts of Turkey, except in the very humid regions around the Black Sea and in the high plateaus of the East Anatolian Region [2]. Most production is drying cultivars whereas fresh apricot cultivars are produced primarily in coastal regions, especially the Mediterranean and Aegean Sea regions of Turkey [3]. In Turkey, apricot is grown in a wide range of climatic conditions. Weathers are very cold during winter and very arid during summer in main apricot growing areas: Malatya, Erzincan, and I?d?r provinces. Apricots grown in these provinces damaged frequently by late spring frost. However, the climate of Mediterranean region which have semiarid, having hot summers and mild-winters can be occurred rarely frost damage [4]. Hatay, which is located in the eastern Mediterranean coast of Turkey, has the most suitable ecological conditions for growing table apricot. Apricot planting in Hatay area has increased rapidly due to the comparative advantage of earliness of harvest. In Turkey, strong market demand, along with the introduction of foreign cultivars, opens up promising possibilities to extend the cropping season to May and June. Breeding programs for
SGR 0418+5729 - How does a Young Neutron Star Spin Down to a 9 s Period with a Dipole Field less than 10^13 G?
M. A. Alpar,U. Ertan,S. Caliskan
Physics , 2011, DOI: 10.1088/2041-8205/732/1/L4
Abstract: The period derivative bound for SGR 0418+5729 (Rea et al. 2010) establishes the magnetic dipole moment to be distinctly lower than the magnetar range, placing the source beyond the regime of isolated pulsar activity in the P - dP/dt diagram and giving a characteristic age > 2 \times 10^{7} years, much older than the 10^5 year age range of SGRs and AXPs. So the spindown must be produced by a mechanism other than dipole radiation in vacuum. A fallback disk will spin down a neutron star with surface dipole magnetic field in the 10^{12} G range and initial rotation period P_0 ~ 100 ms to the 9.1 s period of SGR 0418+5729 in a few 10^4 to ~10^5 years. The current upper limit to the period derivative gives a lower limit of \sim 10^5 years to the age that is not sensitive to the neutron star's initial conditions. The total magnetic field on the surface of SGR 0418+5729 could be significantly larger than its 10^{12} G dipole component.
Beam Dynamics Design and Electromagnetic Analysis of 3 MeV RFQ for TAC Proton Linac
H. F. Kisoglu,A. Caliskan,M. Yilmaz
Physics , 2014, DOI: 10.13538/j.1001-8042/nst.26.030103
Abstract: A beam dynamics design of 352.2 MHz Radio-Frequency Quadrupole (RFQ) of Turkish Accelerator Center (TAC) project which accelerates continuous wave (CW) proton beam with 30 mA current from 50 keV to 3 MeV kinetic energy has been performed in this study. Also, it includes error analysis of the RFQ in which some fluctuations have been introduced to input beam parameters to see how the output beam parameters are affected, two-dimensional (2-D) and three-dimensional (3-D) electromagnetic structural design of the RFQ to obtain optimum cavity paramaters that agree with the ones of the beam dynamics. The beam dynamics and error analysis of the RFQ have been done by using LIDOS.RFQ. Electromagnetic design parameters have been obtained by using SUPERFISH for 2-D cavity geometry and CST Microwave Studio for 3-D cavity geometry.
Impact of intelligent phacoemulsification software on torsional phacoemulsification surgery
Canturk Ugurbas S, Caliskan S, Alpay A, Ugurbas SH
Clinical Ophthalmology , 2012, DOI: http://dx.doi.org/10.2147/OPTH.S35283
Abstract: ct of intelligent phacoemulsification software on torsional phacoemulsification surgery Original Research (1321) Total Article Views Authors: Canturk Ugurbas S, Caliskan S, Alpay A, Ugurbas SH Video abstract presented by Silay Canturk Ugurbas Views: 159 Published Date September 2012 Volume 2012:6 Pages 1493 - 1498 DOI: http://dx.doi.org/10.2147/OPTH.S35283 Received: 22 June 2012 Accepted: 09 August 2012 Published: 12 September 2012 Silay Canturk Ugurbas, Sinan Caliskan, Atilla Alpay, Suat Hayri Ugurbas Department of Ophthalmology, Bulent Ecevit University School of Medicine, Zonguldak, Turkey Background: The purpose of this study was to compare phacoemulsification energy parameters during torsional phacoemulsification with or without the use of intelligent phacoemulsification (IP) software. Methods: One hundred and twenty-eight eyes with nuclear grades ranging from 1 to 5 were enrolled in this randomized prospective study. Operated eyes were divided into two groups, ie, those operated on using IP software (Group 1, n = 67) and those operated on without IP software (Group 2, n = 61). The two groups were compared in terms of ultrasound energy level, ultrasound energy time, aspiration time, and amount of fluid used during surgery. Results: Operated eyes were further grouped according to soft (grade 1 and 2, n = 37), medium (grade 3, n = 46), and hard (grade 4 and 5, n = 31) nuclear densities. Both the study and the control groups were similar in distribution of nuclear density (P > 0.05). Cumulative dissipated energy was measured as 14.06 ± 9.92 in Group 1 and 14.22 ± 10.99 in Group 2 (P = 0.92). Total ultrasound time was 49 seconds in Group 1 and 52 seconds in Group 2 (P = 0.58). Although the torsional amplitude used was similar (P = 0.86) when IP was either on (71%) or off (68.4%), aspiration time was found to be 4 minutes 17 seconds in Group 1 (P = 0.86) and 5 minutes and 17 seconds in Group 2 (P = 0.007). Total fluid used was measured as 91 cc (P = 0.86) in Group 1 and 109 cc (P = 0.02) in Group 2. Conclusion: The new IP software did not cause a difference in ultrasound energy levels. However, the new software was found to be advantageous in regards to fluid use and aspiration time.
Determining total phenolic content and total antioxidant capacity of loquat cultivars grown in Hatay
Polat A,Caliskan Oguzhan,Serce Sedat,Saracoglu Onur
Pharmacognosy Magazine , 2010,
Abstract: Several fruit characteristics of five loquat (Eriobotrya japonica (Thunb.) Lindl.) cultivars/selections grown in D rtyol, Hatay, Turkey were investigated in 2008. The cultivars/selections included ′Baduna 5′, Güzelyurt 1, ′Hafif ukurg bek′, ′Ottaviani,′ and Type 1. The characteristics evaluated included fruit weight, width, length, seed number and weight, flesh/seed ratio, total soluble solids (TSS), pH, acidity, total phenolic (TP) content, and total antioxidant capacity (TAC), determined by the ferric reducing antioxidant power (FRAP) assay. The analyses were conducted by three replicates, with 30 fruits in each replicate. The results indicated that there were significant differences among the cultivars, for all the traits tested. For example, ′Hafif ukurg bek′ and ′Ottaviani′ had smaller fruits than others, although ′Hafif ukurg bek′ had heavier seeds. The flesh/seed ratio was the highest in Type 1, while ′Hafif ukurg bek′ had the highest pH and high soluble solids. ′Baduna 5′ and ′Hafif ukurg bek′ had the highest acidity. The TP ranged from 129 (′Baduna 5′) to 578 (′Hafif ukurg bek′) mg gallic acid equivalent (GAE)/kg fresh fruit (fw). ′Hafif ukurg bek′ also had the highest FRAP mean (12.1 mmol Trolox Equivalent (TE)/kg fw). The results suggest that loquat cultivars have a variable range of TP content and a relatively high total antioxidant capacity, which is crucial for human health.
Effect of Natural Lipid on Pollen Germination and Pollen Tube Growth on Loquat
T. Hakan Demirkeser,Oguzhan Caliskan,A. Aytekin Polat,Mustafa Ozgen
Asian Journal of Plant Sciences , 2007,
Abstract: The present study evaluated the effects of a natural lipid, Lysophosphatidylethanolamine, (L) on the eight-year old loquat (Sayda) orchard located on coastal Mediterranean region in Hatay. The applications were conducted prior to bloom (Treatment I) and the same branches were treated again after two weeks from Treatment I (Treatment I+II) while the control branches were treated with water. After two weeks from the second application, buds were sampled from all experimental units and pollen viability test were conducted by standard methods. Randomly sampled buds from all treatments were kept on a room temperature to obtain pollen for both varieties and treatments. The pollen were germinated on media having various concentration of sucrose (5, 10, 15 and 20%) and incubated at 10, 15 and 20°C. The Petri dishes were placed on -20°C after 3, 6, or 9 h incubation to consecutively determine their germination rates and pollen tube growths under a light microscope. The results clearly demonstrated that L application before bloom significantly improves pollen germination rate and pollen tube growth although it has no effect on pollen viability. Among the incubation treatments, 20°C gave the most favorable results for both pollen germination rate and pollen tube growth. The highest pollen germination rates were recovered from 20% sucrose concentration while the longest pollen tubes were at 15%. The positive effects of L may be very advantageous for loquat growing especially for the early fruit production regions.
Impact of intelligent phacoemulsification software on torsional phacoemulsification surgery
Canturk Ugurbas S,Caliskan S,Alpay A,Ugurbas SH
Clinical Ophthalmology , 2012,
Abstract: Silay Canturk Ugurbas, Sinan Caliskan, Atilla Alpay, Suat Hayri UgurbasDepartment of Ophthalmology, Bulent Ecevit University School of Medicine, Zonguldak, TurkeyBackground: The purpose of this study was to compare phacoemulsification energy parameters during torsional phacoemulsification with or without the use of intelligent phacoemulsification (IP) software.Methods: One hundred and twenty-eight eyes with nuclear grades ranging from 1 to 5 were enrolled in this randomized prospective study. Operated eyes were divided into two groups, ie, those operated on using IP software (Group 1, n = 67) and those operated on without IP software (Group 2, n = 61). The two groups were compared in terms of ultrasound energy level, ultrasound energy time, aspiration time, and amount of fluid used during surgery.Results: Operated eyes were further grouped according to soft (grade 1 and 2, n = 37), medium (grade 3, n = 46), and hard (grade 4 and 5, n = 31) nuclear densities. Both the study and the control groups were similar in distribution of nuclear density (P > 0.05). Cumulative dissipated energy was measured as 14.06 ± 9.92 in Group 1 and 14.22 ± 10.99 in Group 2 (P = 0.92). Total ultrasound time was 49 seconds in Group 1 and 52 seconds in Group 2 (P = 0.58). Although the torsional amplitude used was similar (P = 0.86) when IP was either on (71%) or off (68.4%), aspiration time was found to be 4 minutes 17 seconds in Group 1 (P = 0.86) and 5 minutes and 17 seconds in Group 2 (P = 0.007). Total fluid used was measured as 91 cc (P = 0.86) in Group 1 and 109 cc (P = 0.02) in Group 2.Conclusion: The new IP software did not cause a difference in ultrasound energy levels. However, the new software was found to be advantageous in regards to fluid use and aspiration time.Keywords: cataract surgery, phacoemulsification, Ozil, cumulative dissipated energy, ultrasound energy
Design and Optimization of Low Energy Beam Transport for TAC Proton Facility
H. F. Kisoglu,A. Caliskan,S. Sultansoy,M. Yilmaz
Physics , 2014,
Abstract: In this study, a low energy beam transport (LEBT) channel for the proton linac section of the Turkish Accelerator Center (TAC) has been designed by using TRAVEL code. Commonly used LEBT including two focusing solenoid magnets will transport and match the H- beam from a volume source to RFQ. In the beam dynamics simulations of such a LEBT line, 95% space-charge compensation (SCC) has been considered in this study. We aimed to find out the determination of our RFQ input parameters that gives the best possible beam quality at the entrance of the RFQ using beam collimator in the LEBT line as an alternative way. In this way, we have acquired the best possible beam quality on RFQ input plane as well as optimizing the LEBT line.
Long-term evolution of dim isolated neutron stars
U. Ertan,S. Caliskan,O. Benli,M. A. Alpar
Physics , 2014, DOI: 10.1093/mnras/stu1523
Abstract: The dim isolated neutron stars (XDINs) have periods in the same range as the anomalous X-ray pulsars (AXPs) and the soft gamma-ray repeaters (SGRs). We apply the fallback disk model, which explains the period clustering and other properties of AXP/SGRs, to the six XDINs with measured periods and period derivatives. Present properties of XDINs are obtained in evolutionary scenarios with surface dipole magnetic fields $B_0 \sim 10^{12}$ G. The XDINs have gone through an accretion epoch with rapid spin-down earlier, and have emerged in their current state, with the X-ray luminosity provided by neutron star cooling and no longer by accretion. Our results indicate that the known XDINs are not likely to be active radio pulsars, as the low $B_0$, together with their long periods place these sources clearly below the "death valley".
Page 1 /461824
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.