Aim: to determine the value of RNFL thickness at which visual field defect becomes
detectable.
Methods: Our study included 29 normal subject and 36 glaucomatous patient (one
eye per person) .Every person was examined by OCTOPUS perimetry with glau
coma 30-2
program, and peripapillary RNFL thickness was measured by HIEDELBERGSPECTRALIS
SD_OCT.
Results: comparison of results showed higher sensitivity of OCT compared to
Perimetry. Mean RNFL thickness at which visual field defect showed was 87 microns.
Superior RNFL thickness value which correlated with inferior visual field defect was 101
microns, whereas inferior RNFL thickness value which correlated with superior visual
field defect was 75 microns .and the difference in RNFL thickness between normal and
glaucomatous visual field was significant (p<0.001).
Conclusion: in open-angle glaucoma , it needs significant thinning in RNFL before
visual field defects becomes detectable.
To determine the percentage of Diabetic retinopathy
patients among patients presenting at retina clinic at Almouassat
University Hospital, and to study their systemic and ocular history,
their diabetic retinopathy classification and macular involvement.
الفصل الأول : تعددية النياسب
الفصل الثاني : برمجة التطبيقات الشبكية زبون-مخدم
الفصل الثالث : خدمات الويب
In this paper, we
describe an algorithm to register the retinal images by employing a relatively
cross-correlation function. Pixel to pixel accuracy has been investigated and
evaluated among registered images by calculating the local cross-correla
tion
between extracted vessels profiles along tracked vessels after transforming
the images into alignment.
This study aim to determine the percentage of Blindness among
patients, who visit retina clinic, and to know the main retinopathies
leading to blindness, and to achieve this purpose, medical records of
852 patients who visited retina clinic betwee
n January 2015 and
January 2016 were analyzed. That information was classified
according to the visual acuity and retinopathy. Data was entered and
analyzed using SPSS version 23.
Considered the diagnosis of diseases using image processing is one of the most
important areas of image processing techniques used in the medical field, Where is the
digital data in the field of ophthalmology focus of researchers for automatic dete
ction of
some important diseases such as diabetic retinopathy (DR).
And is defined as damage to the retina of the eye comes as serious complications and
on the human body complications resulting from diabetes in the long term and is
considered one of the most important causes of blindness in the world and cause serious
damage to the retina.
The research aims to Assess the performance of some of the methods used in the
diagnosis of diabetic retinopathy by revealing one of the most important accompanying
pests him in the retina of the eye and is the exudates and through diagnosed in images
digital fundus through image processing techniques where this detection process
contributes in helping to early detection.
The study is researching the fault tolerance in the large distributed
environments such as grid computing and clusters of computers in
order to find the most effective ways to deal with the errors
associated with the crash one of the devices in th
e environment or
network disconnection to ensure the continuity of the application in
the presence of the faults.In this paper we study a model of the
distributed environment and the parallel applications within it. Then
we provide a checkpoint mechanism that will enable us to ensure
continuity of the work used by a virtual representation of the
application (macro dataflow) and suitable for the applications
which uses work stealing algorithm to distribute the tasks which
are implemented in heterogeneous and dynamic environment.
This mechanism will add a simple cost to the cost of parallel
execution as a result of keeping part of the work during fault-free
execution. The study also provides a mathematical model to
calculate the time complexity i.e. the cost of this proposed
mechanism.
The increasing number of individuals with diabetes suggests that diabetic retinopathy DR is
a major contributor to vision loss. The initial disease is characterized by increased vascular
permeability due to a breakdown in the blood-retinal barrier
BRB, causing macular edema DME,
with a progressive vascular occlusion and retinal neovascularization which are secondary to
ischemia and oxidative stress. Laser photocoagulation and vitrectomy only target advanced stages
of disease. However, despite laser treatment, patients with DME experienced gradual loss of
vision. Intravitreal triamcinolone IVTA reduces the breakdown of BRB and down-regulates the
production of vascular endothelial growth factor VEGF. IVTA may moderately but temporarily
improves visual acuity in cases of DME. Agents that attenuate VEGF action such as bevacizumab
are expected to reduce permeability and neovascularization. Intravitrealbevacizumab IVB reduces
macular edema secondary to central retinal vein occlusion, vascular permeability and fibrovascular
proliferationin. Calcium dobesilate CD is a potent antioxidant, slows vascular proliferation.
The implantation of production processes by using network planning for mass
production is considered essential in machine production and maintenance . This is more
important when producing items as an integrated project that has to be finished in s
pecific
time and with last cost. The network planning is seen from a new perspective because it
studies reaction method and response method to incidental (emergency) events in industrial
production such as ( machine malfunction, shortage in raw materials…) This study uses
probability methods which considers all previous factors when calculating the critical path
in Network plans.
The new approach of this research is using Network planning for programming
production processes in mass production especially in maintenance processes.
Advanced Reservation (AR) is used to guarantee resource provisioning for many different types of
applications including workflows. This technique is still under a huge controversy in both Business and
Research communities because of its potentialit
y of reducing resource utilization. Most of the works
proposed in this domain suggest reservation for the whole workflow schedule, and on all available
resources at the same time, which worsen the problem of resource utilization.
Many solutions are introduced to improve resource utilization under advanced reservation through
generating relaxed and elastic reservation plans that local scheduling systems could modify to improve
utilization and decrease internal fragmentation. These solutions depend mainly on changing rigid AR,
which considered to be the most difficult kind of reservation, into relaxed and elastic ones through adding
extra time on the resulted schedule and then distributing it on all tasks of the workflow.
This paper presents a new autonomic algorithm (EWARP) for producing elastic reservation plans for
workflow applications which doesn’t add extra times. Instead, it depends on exploiting the timing gaps
produced by the different scheduling algorithms. The new algorithm use the technique of discovering
timing gaps, but modifies it, and adds to it to be used for producing an elastic reservation plan for
workflows. The results presented in this paper demonstrate how the proposed algorithm outperforms
existing works in the fields by a lower bound approximating 25%.This shows that (EWARP) algorithm
offer efficient and practical solutions for the problem of scheduling workflow applications under QoS
constrains.
