Home OALib Journal OALib PrePrints Submit Ranking News My Lib FAQ About Us Follow Us+
 Title Keywords Abstract Author All

Publish in OALib Journal

ISSN: 2333-9721

APC: Only \$99

Submit

2019 ( 7 )

2018 ( 7 )

2017 ( 7 )

2016 ( 2 )

Search Results: 1 - 10 of 447 matches for " Jalal Hassanzadeasl "
 Page 1 /447 Display every page 5 10 20 Item
 Jalal Hassanzadeasl International Journal of Analysis , 2013, DOI: 10.1155/2013/654659 Abstract: Recently, Samet et al. (2012) introduced the notion of - -contractive type mappings. They established some fixed point theorems for these mappings in complete metric spaces. In this paper, we introduce the notion of a coupled - -contractive mapping and give a common fixed point result about the mapping. Also, we give a result of common fixed points of some coupled self-maps on complete metric spaces satisfying a contractive condition. 1. Introduction We know fixed point theory has many applications and was extended by several authors from different views (see, e.g., [1–33]). Recently, Samet et al. introduced the notion of - -contractive type mappings [3]. Denote with the family of nondecreasing functions such that for all , where is the th iterate of . It is known that for all and [3]. Let be a metric space, a self map on , and . Then, is called a - -contractive mapping whenever for all . Also, we say that is -admissible whenever implies for all [3]. Also, we say that has the property ( ) if is a sequence in such that for all and , then for all . Let be a complete metric space and let a -admissible - -contractive mapping on . Suppose that there exists such that . If is continuous or has the property ( ), then has a fixed point (see [3]; Theorems 2.1 and 2.2). Finally, we say that has the property ( ) whenever for each there exists such that and . If has the property ( ) in the Theorems？？2.1 and 2.2, then has a unique fixed point ([3]; Theorem 2.3). It is considerable that the results of Samet et al. generalize similar ordered results in the literature (see the results of the third section [3]). The aim of this paper is introducing the notion of generalized coupled - -contractive mappings and give a common fixed point result about the mappings. Definition 1. Let？？ ？？the family of functions satisfy:(i) and for all ;(ii) is continuous;(iii) is nondecreasing on ;(iv) for all . Definition 2. Let the family of functions satisfy is nondecreasing; , for all . These functions are known in the literature as ( )-comparison functions. It is easily proved that if is a ( )-comparison function, then for all . Definition 3. Let be a metric space, and let with given coupled mappings. Let , , , and let for all coupled mappings and . One says that ,？？ are generalized coupled -contractive mappings whenever for all . Definition 4. Let , and let . One says that ,？？ are coupled -admissible if for all . Definition 5. Let be a compete metric space. For two subsets ,？？ of , one marks , if for all , there exists such that . Definition 6. A partial metric on a nonempty set is a
 Jalal Karam Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.37116 Abstract: In the last decade, Daubechies’ wavelets have been successfully used in many signal processing paradigms. The construction of these wavelets via two channel perfect reconstruction filter bank requires the identification of necessary conditions that the coefficients of the filters and the roots of binomial polynomials associated with them should exhibit. In this paper, orthogonal and Biorthogonal Daubechies families of wavelets are considered and their filters are derived. In particular, the Biorthogonal wavelets Bior3.5, Bior3.9 and Bior6.8 are examined and the zeros distribution of their polynomials associated filters are located. We also examine the locations of these zeros of the filters associated with the two orthogonal wavelets db6 and db8.
 Jalal A. Aliyev Advances in Biological Chemistry (ABC) , 2012, DOI: 10.4236/abc.2012.23039 Abstract: The peculiarities of leaf carbon dioxide gas exchange in soybean genotypes grown in field over a large area and contrasting in duration of vegetation, photosynthetic traits and productivity were studied. Varietal differences in the daily and ontogenetic changes in photosynthesis and photorespiration were identified. It was established that the period of the high activity of photosynthetic apparatus in high productive soybean genotypes lasts for a longer time. The photosynthetic rate and the rate of CO2 release in light due to photorespiration are higher in high productive genotypes. A value of photorespiration in contrasting soybean genotypes constitutes about 28% - 35% of photosynthetic rate. The ratio of gross photosynthesis to photorespiration in genotypes with different productivity is constant enough during ontogenesis, indicating a direct positive correlation between gross photosynthesis and photorespiration. Therefore, contrary to conception arisen during many years on the waste-fulness of photorespiration, taking into account the versatile investigations on different aspects of photo-respiration, it was proved that photorespiration is one of the evolutionarily developed vital metabolic processes in plants and the attempts to reduce this process with the purpose of increasing the crop productivity are inconsistent.
 Jalal Jalal Shokouhi Iranian Journal of Radiology , 2009, Abstract: Introduction: Leak of CSF is a relatively common complication in skull base fractures and it is rarely seen during skull base tumors and pituitary gland pathologies "Adenomas and empty sellae syndrome"."nThe common site of CSF leakage is related to the site of fracture but it is more common in cribriform plate fractures. Other sites are frontal sinus fractures and rarely sphenoid sinus lesions related to pituitary gland site pathology. Evaluation of the cribriform plate and the posterior wall of the frontal sinus is an imaging key point."nOther rare conditions of CSF leak are related to temporal bone fractures leading to otorrhea and in a paradoxical feature with rhinorrhea "intact tympanic membrane with temporal bone fracture and eustachian tube transmission of fluid"."nEthiology "nTrauma and skull base fractures epecially in the cribriform plate."nParanasal sinus fractures specially in the frontal and sphenoidal sinuses."nTemporal bone fractures."nEmpty sellae and intrasellar tumors."nPost-op stage in the skull base tumors."nDiagnosis"nNasal CSF leakage laboratory."nRadioneucleid imaging: This way is sensitive but non-specific."nMethylen blue injection into CSF via lumbar puncture "non-specific" and rarely used."nHigh resolution axial, coronal and sagittal reconstructed images of skull base as a modality of choice"nIn case of positive CSF leak but negative spiral ultra-high resolution CT in PNS, ethmoidal region and cribriform plate also temporal bone cuts we need linear and pleuridirectional X-ray tomography."nIn case of positive CSF leakage and negative radiology and imaging it needs exploration surgery to direct vision of anterior fossa floor bones for fracture."n-Companion complication could be recurrent meningitis."n- No 3D-CT or MRI is necessary for bone fractures but MRI could be"nnecessary for related brain contusion or soft tissue lesions and tumor."nX-ray CT-cisternography"nAlthough more than 90% of fractures could be detected by multidirectional ultra-high resolution bone CT of the skull base, CT-cisternography is used to show the CSF leak point and CSF reservoir in sinuses or ethmoidal cells."n- In our experiments all positive cases diagnosed by CT-cisternography were detected by UHRCT of the bone and no positive cisternography was detected after negative plain UHRCT."nCoronal UHRCT is the more important and sensitive method mode for the diagnosis of the leak point."nInjection of 15cc non-ionic contrast media like ultravist 300 into CSF via lumbar puncture increases about 100-110 hounsfield units density of leaked CSF via active leak point
 Jalal Jalal Shokouhi Iranian Journal of Radiology , 2009, Abstract: "nToday the modality of choice for brain tumors is MRI with and without GD. "nGD injection needs during to stage T1, before injection and after injection for image subtracts to see the enhancement degree, detecting crystallized calcification, colloid and fat material also methemoglubin inside the tumor. "n- In case of thin layer seeding, GD MRI could be positive but T2 and FLAIR images could be negative "no mass effect". "n- For meningiomas if you do not want to inject contrast media please request plain CT SCAN that is stronger than non-contrasted MRI but GD MRI is the choice and better than both. "n- For small or micro-vestibular schwannoma do not request CT please request MRI with GD. "n- In craniopharyngioma request non-contrast CT with combination of MRI with and without GD. "n- For micro-adenoma request dynamic MRI "better than Dynamic CT" "n- please do not use axial CT and non-contrasted coronal CT for micro-adenoma". "n- Few infiltrative non-enhancing tumors need serial MRI to be differentiated from CVA. "n- For differentiation of tumor recurrency from radiotherapy necrosis MRS is necessary. "nOther lecture notes will be discussed in the round table.