This paper focuses on mobility management issue. It investigates the
evaluation of mobility management protocols via a generic mathematical
model and evaluates some sample protocols using the mentioned
protocols.
This research includes a numerical study using Finite Element Method aims to
evaluate the ability and accuracy of using Non-destructive Impact Response Method in the
assessment of length and cross-sections of intact concrete pile (not deformed) in
both time
and frequency domains. Therefore, an appropriate numerical model depends on the
modeling of both impact force (impulsive load) and distributing medium (pile + soil) and
insert them in computing software ABAQUS was carried out. The numerical model was
verified corresponding to field measures obtained from literature review and the results
showed good agreement between measures and numerical results. Furthermore, the model
was applied on a typical example in order to study vibration distribution in the pile due to
impulsive load applied on pile top. Mechanical response curve of intact pile was obtained.
Then, both of length and cross-section area of the pile were determined. Finally,
parametrical study of most important factors (stiffness of soil surrounding the pile and
length of pile embedded in the soil) effect on vibration distribution resulted from impulsive
load applied on pile top. The parametrical study was carried out in two domains; first one
was time domain depending on the direct analysis of particle displacement and velocity
and the second was frequency domain depending on analysis of pile mechanical response
curve. The results of this research enables to use the proposed numerical model to
numerically obtain the time history of particle displacement and velocity in addition to the
curve of mechanical response computed in the pile top and forms reference diagrams
which is used later to compare with similar diagrams resulted from field test of executed
piles. As a result, pile integrity test and detecting of defects in the piles if any. In addition,
the limits of the use of both analysis methods adapted in research and choose the best
between them according to the case study.
طريقة العناصر المنتهية
Finite element method
اختبار سلامة الأوتاد
تجارب الصدم غير المخربة
السجلات الزمنية للإهتزازات
تابع قابلية الحركة
منحني الإستجابة الميكانيكية للوتد
المجالين الزمني و الترددي
Pile Integrity Test
impulsive load
nondestructive impact tests
vibration time history
mobility function
pile mechanical response curve
time and frequency domains
ABAQUS
المزيد..
This research paper aims at a detailed
analysis of the mobility management issue in IP-based networks, studying and
also evaluating the performance of Mobile IP Fast Authentication protocol
(MIFA) compared to its counterparts using Network Simulator 2 (NS2).
This research
handles the modeling human mobility patterns in a geographical area. It also
reviews well-known models along with their pros and cons. The main result we
obtained says that people do not move most of time. In fact, they spend the
ma
jority of their time in certain places, homes, offices, etc. Furthermore, human
mobility patterns show regularity if observed over a long-enough time duration.
In this research the development of mathematical analysis of the
mechanisms Model structure levels of complexity and different mobility
Add to display the results of the calculations tables and apply it to
different mechanisms mobility values were displayed assemble the
different options for the mechanics of thoughtful and explain how to
remove the excess links fees.
Approved a Syrian legislator protect the freedom of movement acted
involuntarily to man, expresses hereby expressly intention to move and
wander according to his will, for the exercise of its work and its rights and
other freedoms, but this does n
ot mean that the desire of the individual has
become similar to the rule of law Such freedom is not absolute, it can not be
for a person to give up her due its close association with the moral side of the
human personality.
Improving system performance in terms of data rate, latency, mobility and cost is the scope of Long Term Evolution (LTE) system. All IP architecture with distributed mobility management that have been implemented in LTE and the handover (HO) decision
is performed by the evolved base station (eNB). The ping-pong movement in LTE is one of the most crucial problems which reduce the performance of the HO. In this paper, the impact of ping-pong handover on inter eNB handover in LTE networks is investigated. The object of the present work is to provide a method for reducing the number of ping-pong HOs in intra E-UTRA networks. A novel HO algorithm, based on keeping the old path between the source eNB and SGW/MME during the ping-pong movement and delaying the completion HO part,
is presented. The ping-pong avoidance algorithm for intra E-UTRA can be a tool to reduce the number of ping-pong HOs and control the demands of the network resources. Analysis results -based on fuzzy logic technique- of the proposed algorithm showed that the
probability of ping-pong HO can be reduced efficiently as the difference between the received signal strength from the target and the source (SS(target-source)) and the timer value are higher than 3dB and 1.5 sec respectively.
To study the prevalence of the diabetic hand in a group of type 2 diabetics,
comparing to age- sex matched non-diabetics control group, and to investigate clinical features among
diabetics with or without the diabetic hand.
Noise and transport characteristics of CdTe gamma - and X-ray detectors have been carried out to
determine the 1/f noise sources and their correlation with charge carriers mobility. The noise spectral
density was measured by standard set-up. The no
ise of low ohmic samples has 1/f noise spectral
density which increases with the square of voltage. The high ohmic samples show 1/f type noise in low
frequency range. This flicker noise leads to degradation in the homogeneity of the contact. The excess
of noise changes as 1/fa , 1 a 2 at 10Hz, and it is due to the multitrapping of the CdTe. Thiscontributes to the loss in charge collection efficiency.
