This document summarizes a study that used diagnostic ultrasound to detect atherosclerotic changes in the femoral arteries of the lower limbs. The study examined 5 cases with a history of high blood pressure and an unbalanced diet. Ultrasound images of the femoral arteries were analyzed for changes from the normal triphasic waveform pattern. Atherosclerosis was indicated by the presence of a biphasic waveform with prolonged diastole and reduced systole peaks, or a monophasic waveform with only a low systole peak and no diastole. The degree of change correlated with the severity of atherosclerotic changes. Ultrasound was found to be a good non-invasive method for detecting atherosclerosis in the femoral arteries.
Aortic aneurysm is a medical condition, in which aorta, gets enlarged. Abdominal and Thoracic are two categories of aortic aneurysm. These conditions can lead to abdominal pain, low blood pressure, loss of consciousness or even death. Endovascular aneurysm repair (EVAR) is a minimally invasive surgical method to treat abdominal and thoracic aortic aneurysm. It is an alternative to open surgery for abdominal aortic aneurysm (AAA), which makes it relatively safe and less time consuming. However, not all patients suffering from aneurysm are suitable for EVAR. Also, it is difficult to treat aneurysm near or on the kidney using EVAR.
Catheter Based Intervention and Surgical Management of Peripheral Arterial Oc...Omar Haqqani
Dr. Omar P. Haqqani, MD discusses the details of catheter based blood vessel intervention, focussed on management of peripheral arterial disease (PAD).
Aortic aneurysm is a medical condition, in which aorta, gets enlarged. Abdominal and Thoracic are two categories of aortic aneurysm. These conditions can lead to abdominal pain, low blood pressure, loss of consciousness or even death. Endovascular aneurysm repair (EVAR) is a minimally invasive surgical method to treat abdominal and thoracic aortic aneurysm. It is an alternative to open surgery for abdominal aortic aneurysm (AAA), which makes it relatively safe and less time consuming. However, not all patients suffering from aneurysm are suitable for EVAR. Also, it is difficult to treat aneurysm near or on the kidney using EVAR.
Catheter Based Intervention and Surgical Management of Peripheral Arterial Oc...Omar Haqqani
Dr. Omar P. Haqqani, MD discusses the details of catheter based blood vessel intervention, focussed on management of peripheral arterial disease (PAD).
Ascending aortic aneurysm and its clinical significance: A case reportApollo Hospitals
Aorta, the major conductance vessel of the body, can be affected by a variety of pathologic processes leading to aneurysm, dissection, or ischemic syndromes. There has been a drastic increase in the incidence of aortic aneurysm making it the 18th most common cause for death.
When ignored, the patients’ condition might worsen leading to death due to rupture and hemorrhage. Here we report a case of ascending aortic aneurysm affecting the aortic root and proximal part of ascending aorta. Conscious awareness of this pathological process augments a great deal to radiologists and sonographers during various imaging techniques and rescues the patient from aneurysm-related deaths.
An elderly diabetic and hypertensive male presented with acute renal failure and rhabdomyolysis. He experienced cardiac arrest with moderate hyperkalemia despite medical treatment and hemodialysis. Telemetry changes were retrospectively studied and found to have significant rhythm changes that occurred just less than 10 minutes prior to the cardiac arrest.
Significant unprotected left main (LM) coronary artery disease is present in <10% of patients undergoing coronary angiography. In autopsy research, a mean LM length of 10.8 mm ± 5.2 mm (range 2–23 mm), mean LM diameter 4.9 mm ± 0.8 mm and mean angle between the left anterior descending (LAD) and left circumflex (LCx) of 86.7° ± 28.8° has been described. This angle value positively correlated with LM length.2 Further studies showed that long LM developed stenoses more frequently near the distal bifurcation compared to near the ostium (77% versus 18%).7 It is also worth emphasising that LM bifurcation disease is rarely focal and that both sides of the carina are almost never disease-free. Furthermore, continuous plaque from the LM into the proximal LAD artery has been reported in 90% of cases.8 Summarised below are the most crucial LM peculiarities (in comparison with non-LM bifurcations), which should be taken into consideration when distal LM stenosis PCI is planned:
Valve in-valve implantation into a failed mechanical prosthetic aortic valveRamachandra Barik
First successful transcatheter valve-in-valve implantation into a failed mechanical prosthetic aortic valve facilitated by fracturing of the leaflets: a case report
Orthogonal frequency-division multiplexing (OFDM)
[1] is a method of encoding digital data on multiple carrier
frequencies. OFDM[1] has developed into a popular scheme
for wideband digital communication, whether wireless or
over copper wires, used in applications such as digital television
and audio broadcasting, DSL Internet access, wireless networks,
powerline networks, and 4G mobile communications. In the
Several wireless standards such as IEEE 802.11a[2] and
HiperLAN2[3].The orthogonality of the subcarriers is no longer
maintained which results in ICI (Inter carrier Interference)[4]
.ICI reduction techniques achieve a better SNR and BER in
OFDM at zero phase noise variance . This technique will use a
large number of closely spaced orthogonal subcarriers to avoid
phase noise. It provides high data rates with sufficient robustness
to radio channel damages. A major problem in OFDM is carrier
frequency offset error between the transmitted and received
signals. Due to this the orthogonality of the subcarriers is no
longer maintained which results in ICI (Inter carrier
Interference). In this paper, we used the ICI self-cancellation
technique and reduced the ICI and improved the BER and SNR
we are also calculate the SNR=15db and 20db at different phase
noise variance.
Ascending aortic aneurysm and its clinical significance: A case reportApollo Hospitals
Aorta, the major conductance vessel of the body, can be affected by a variety of pathologic processes leading to aneurysm, dissection, or ischemic syndromes. There has been a drastic increase in the incidence of aortic aneurysm making it the 18th most common cause for death.
When ignored, the patients’ condition might worsen leading to death due to rupture and hemorrhage. Here we report a case of ascending aortic aneurysm affecting the aortic root and proximal part of ascending aorta. Conscious awareness of this pathological process augments a great deal to radiologists and sonographers during various imaging techniques and rescues the patient from aneurysm-related deaths.
An elderly diabetic and hypertensive male presented with acute renal failure and rhabdomyolysis. He experienced cardiac arrest with moderate hyperkalemia despite medical treatment and hemodialysis. Telemetry changes were retrospectively studied and found to have significant rhythm changes that occurred just less than 10 minutes prior to the cardiac arrest.
Significant unprotected left main (LM) coronary artery disease is present in <10% of patients undergoing coronary angiography. In autopsy research, a mean LM length of 10.8 mm ± 5.2 mm (range 2–23 mm), mean LM diameter 4.9 mm ± 0.8 mm and mean angle between the left anterior descending (LAD) and left circumflex (LCx) of 86.7° ± 28.8° has been described. This angle value positively correlated with LM length.2 Further studies showed that long LM developed stenoses more frequently near the distal bifurcation compared to near the ostium (77% versus 18%).7 It is also worth emphasising that LM bifurcation disease is rarely focal and that both sides of the carina are almost never disease-free. Furthermore, continuous plaque from the LM into the proximal LAD artery has been reported in 90% of cases.8 Summarised below are the most crucial LM peculiarities (in comparison with non-LM bifurcations), which should be taken into consideration when distal LM stenosis PCI is planned:
Valve in-valve implantation into a failed mechanical prosthetic aortic valveRamachandra Barik
First successful transcatheter valve-in-valve implantation into a failed mechanical prosthetic aortic valve facilitated by fracturing of the leaflets: a case report
Orthogonal frequency-division multiplexing (OFDM)
[1] is a method of encoding digital data on multiple carrier
frequencies. OFDM[1] has developed into a popular scheme
for wideband digital communication, whether wireless or
over copper wires, used in applications such as digital television
and audio broadcasting, DSL Internet access, wireless networks,
powerline networks, and 4G mobile communications. In the
Several wireless standards such as IEEE 802.11a[2] and
HiperLAN2[3].The orthogonality of the subcarriers is no longer
maintained which results in ICI (Inter carrier Interference)[4]
.ICI reduction techniques achieve a better SNR and BER in
OFDM at zero phase noise variance . This technique will use a
large number of closely spaced orthogonal subcarriers to avoid
phase noise. It provides high data rates with sufficient robustness
to radio channel damages. A major problem in OFDM is carrier
frequency offset error between the transmitted and received
signals. Due to this the orthogonality of the subcarriers is no
longer maintained which results in ICI (Inter carrier
Interference). In this paper, we used the ICI self-cancellation
technique and reduced the ICI and improved the BER and SNR
we are also calculate the SNR=15db and 20db at different phase
noise variance.
Data mining , knowledge discovery is the process
of analyzing data from different perspectives and summarizing it
into useful information - information that can be used to increase
revenue, cuts costs, or both. Data mining software is one of a
number of analytical tools for analyzing data. It allows users to
analyze data from many different dimensions or angles, categorize
it, and summarize the relationships identified. Technically, data
mining is the process of finding correlations or patterns among
dozens of fields in large relational databases. The goal of
clustering is to determine the intrinsic grouping in a set of
unlabeled data. But how to decide what constitutes a good
clustering? It can be shown that there is no absolute “best”
criterion which would be independent of the final aim of the
clustering. Consequently, it is the user which must supply this
criterion, in such a way that the result of the clustering will suit
their needs.
For instance, we could be interested in finding
representatives for homogeneous groups (data reduction), in
finding “natural clusters” and describe their unknown properties
(“natural” data types), in finding useful and suitable groupings
(“useful” data classes) or in finding unusual data objects (outlier
detection).Of late, clustering techniques have been applied in the
areas which involve browsing the gathered data or in categorizing
the outcome provided by the search engines for the reply to the
query raised by the users. In this paper, we are providing a
comprehensive survey over the document clustering.
Batch adsorption experiments were carried out for
the adsorption of cationic dye from aqueous solution onto
composite activated carbon. The composite activated carbon was
prepared from brewer’s spent grain and sea bean shell at a ratio
of 1:1. The equilibrium studies were done at different
concentrations and temperatures. The equilibrium data were
fitted to Langmuir, Freundlich, Dubinin-Radushkevich, and
Temkin isotherm models. The results showed that both Lagmuir
and Freundlich isotherm model fitted the data reasonably well
but Freundlich isotherm fitted better in the temperature range
studied. This confirmed that the adsorption is heterogeneous,
non-specific and non-uniform in nature. Kinetic studies were also
undertaken in terms of first order, second order, pseudo first
order, pseudo second order, Elovich, Boyd, and intra-particle
diffusion models. The results indicated that the data followed
pseudo second order model with surface adsorption and intraparticle
diffusion concurrently operating during the adsorbateadsorbent
interaction. The values of the thermodynamic
parameters computed from Van’t Hoff plot confirmed the
process to be endothermic and spontaneous in nature.
IMAGES OF A COMPLEX CASE OF MULTIPLE ANEURYSMAL DISEASE IN A 58 YEAR OLD MAN
IMMAGINI DI UN CASO COMPLESSO DI MALATTIA POLINEURISMATICA
(Chirurgia Vascolare-ULSS 15 Alta Padovana)
(Vascular Surgery -ULSS 15 Alta Padovana)
— Profunda femoris artery and its branches are extensively used in different diagnostic and therapeutic interventions. Knowledge about the anatomical variations is important to prevent iatrogenic complications. During routine dissection for teaching medical graduates, a variant vascular pattern of lateral circumflex femoral arteries was observed in an adult cadaver. The Lateral Circumflex Femoral Artery was found to be arising directly from the Femoral Artery on its posterior aspect, 7.0 cm distal to the inguinal ligament on the left side.
se prezinta rolul ultrasonografiei Doppler in evaluarea patului vascular arterio-venos la pacientii cu indicatie de dializa, monitorizarea fistulei arterio-venoase si a eventualelor complicatii
Radiological evaluation of takayasu arteritis Dr. muhammad Bin Zulfiqar Servi...Dr. Muhammad Bin Zulfiqar
Radiological evaluation of takayasu arteritis Dr. muhammad Bin Zulfiqar Services Institute of Medical Sciences Services Hospital Lahore
In this presentation we will discuss the role of imaging in TA.
The Vertebral Artery Test
Luc Peeters, MSc.Ost. & Grégoire Lason, MSc.Ost.
The International Academy of Osteopathy
http://www.osteopathie.eu/en
http://www.osteopathie.eu/en/publications
info@osteopathy.eu
Correlation Between ECG Changes and 2D Speckle Tracking Echocardiography with...Premier Publishers
The clinical presentation of acute coronary syndrome is variable Patients with suspected NSTE-ACS are a heterogeneous group. Coronary occlusion may or may not be present. To correlate 2D speckle tracking echocardiography with coronary angiography results in non-ST segment elevation myocardial infarction patients and test its ability to predict culprit lesion. It is a prospective study where 100 patients with non-ST elevation myocardial infarction were enrolled in the study where regional wall motion score index was obtained by echocardiography then 2D speckle tracking echocardiography was done and territorial longitudinal strain for each vessel was obtained and finally coronary angiography was done. By using the bull’s eye view of the territorial LS values obtained from the 17 myocardial segments to predict the culprit artery for each patient the sensitivity for prediction of culprit LAD was 93.3 %, specificity was 92.7 %, For LCX; sensitivity was 82.7 %, specificity was 92.9 % and for RCA; sensitivity was 84 %, specificity was 93.3 %. Longitudinal strain imaging by 2D speckle-tracking might help in the work-up of non-ST elevation myocardial infarction patients. In addition, it may be helpful to localize coronary artery stenosis in a given perfusion territory.
Assessment of Intermediate Coronary Artery Lesion with Fractional Flow Reserv...Premier Publishers
Fraction flow reserve (FFR) is considered the gold standard for assessing intermediate coronary lesions. Retrospective data analyses showed variable relationship between intravascular ultrasound (IVUS) parameters and FFR results. This study aimed to determine the optimal minimum lumen area (MLA) by IVUS that correlates with FFR and to assess the correlation between two modalities in assessing intermediate coronary lesions. Methods: Fifty eight intermediate coronary lesions mainly located in proximal and mid segments of large main coronary vessels with RVD (3-4mm) were analyzed using both IVUS and FFR to assess the significance of coronary stenting and to determine the optimal IVUS-MLA that correlates with FFR value < 0.8. Results: IVUS-MLA ranged from 2.5 to 4.2 mm2 had a highly significant positive correlation with FFR value < 0.8 (p < 0.0001). Using the ROC curve analysis, IVUS-MLA < 3.9 mm2 (84.2% sensitivity, 80% specificity, area under curve (AUC) = 0.68) was the best threshold value for identifying FFR <0.8>< 0.8 in coronary vessels with RVD (3-4mm). Different MLA cutoffs should be used for different vessel diameters.
Similar to DIAGNOSTIC ULTRASOUND FOR THE DETECTION OF ATHEROSCLEROTIC CHANGES INSIDE FEMORAL ARTERIES OF LOWER LIMB (20)
Recent joint surgery studies reveal increased
revisions and resurfacing of the metal on metal hip joints. Metal
on metal hip implants were developed more than thirty years ago
and their application has been refined because of availability of
advanced manufacturing techniques and partly by advancements
in material science and engineering. Development of composite
materials may provide greater durability to metal-on-metal hip
implants .This review article is a study of the latest literature of
metal-on-metal hip implants and its various modeling techniques.
Numbers of methods are used for convergence and numerical
solution to investigate the performance of metal-on-metal hip
implant for accurate stable solution. This paper presents analysis
done by various researchers on metal-on-metal hip implants for
wear, lubrication, fatigue, bio-tribo-corrosion, design, toxicity
and resurfacing. After in vivo and in vitro studies, it is found that
all these methods have limitations. There is a need of more
insight for lubrication analysis, geometry of bearings, materials
and input parameters. The information provided in this work is
intended as an aid in the assessment of metal-on-metal hip joints.
Background Hospital contributes significantly tangible and intangible resources on a concurred plan by the scheduling of surgery on the OT list. Postponement decreases efficiency by declining throughput leads to wastage of resources hence burden to the nation. Patients and their family face economic and emotional implication due to the postponement. Postponement rate being a quality indicator controls check mechanism could be developed from the results. Postponement of elective scheduled operations results in inefficient use of the operating room (OR) time on the day of surgery. Inconvenience to patients and families are also caused by postponements. Moreover, the day of surgery (DOS) postponement creates logistic and financial burden associated with extended hospital stay and repetitions of pre-operative preparations to an extent of repetition of investigations in some cases causing escalated costs, wastage of time and reduced income. Methodology A cross-sectional study was done in the operation theaters of a tertiary care hospital in which total ten operation theaters of General Surgery Data of scheduled, performed and postponed surgeries was collected from all the operation theater with effect from March 1st to September 30th, 2018. A questionnaire was developed to find out the reasons for the postponement for all hospital’s stakeholders (surgeons, Anesthetist, Nursing Officer) and they were further evaluated time series analysis of scheduling of Operation Theater for moving average technique. Results Total 958 surgeries were scheduled and 772 surgeries performed were and 186 surgeries were postponed with a postponement rate of 19.42% in the cardiac surgery department during the study period. Month-wise postponement Rate exponential smoothing of time series data shows the dynamic of operating suits. To test throughput Postponement rate was plotted the postponed surgeries and on regression analysis is in a perfect linear relationship.
Introduction: Postponement of elective scheduled operations results in inefficient use of operating room (OR) time on the day of surgery. Inconvenience to patients and families also caused by postponements. Moreover, day of surgery (DOS) postponement creates logistic and financial burden associated with extended hospital stay and repetitions of pre-operative preparations to an extend of repetition of investigations in some cases causing escalated costs, wastage of time and reduced income. Methodology: A cross sectional study was done in the operation theaters of a tertiary care hospital in which total ten operation theaters of General Surgery Data of scheduled, performed and postponed surgeries was collected from all the operation theater with effect from march 1st to September 30th 2018. A questionnaire was developed to find out the reasons for the postponement for all hospital’s stakeholders (Surgeons, Anesthetist, Nursing officer) and they were further evaluated Time series analysis of scheduling of Operation Theater for Moving average Technique. Results: total 2,466 surgeries were scheduled and 1,980 surgeries were performed and 486 surgeries were postponed in the general surgery department during the study period. Month wise postponement forecast was in accordance with the performed surgeries and on regression analysis postponed surgeries were in perfect linear relationship with the postponement Rate.
In the present paper the experimental study of
Nanotechnology involves high cost for Lab set-up and the
experimentation processes were also slow. Attempt has also
been made to discuss the contributions towards the societal
change in the present convergence of Nano-systems and
information technologies. one cannot rely on experimental
nanotechnology alone. As such, the Computer- simulations and
modeling are one of the foundations of computational
nanotechnology. The computer modeling and simulations
were also referred as computational experimentations. The
accuracy of such Computational nano-technology based
experiment generally depends on the accuracy of the following
things: Intermolecular interaction, Numerical models and
Simulation schemes used. The essence of nanotechnology is
therefore size and control because of the diversity of
applications the plural term nanotechnology is preferred by
some nevertheless they all share the common feature of control
at the nanometer scale the latter focusing on the observation
and study of phenomena at the nanometer scale. In this paper,
a brief study of Computer-Simulation techniques as well as
some Experimental result
Solar cell absorber Kesterite- type Cu2ZnSnS4 (CZTS) thin films have been prepared by Chemical Bath Deposition (CBD). UV–vis absorption spectra measurement indicated that the band gap of as-synthesized CZTS was about1.68 eV, which was near the optimum value for photovoltaic solar conversion in a single-band-gap device. The polycrystalline CZTS thin films with kieserite crystal structure have been obtained by XRD. The average of crystalline size of CZTS is 27 nm
Multilevel inverters play a crucial part in the
areas of high and medium voltage applications. Among the three
main multilevel inverters used, the capacitor clamped multilevel
inverter(CCMLI) has advantage with respect to voltage
redundancies. This work proposes a switching pattern to improve
the performance of chosen H-bridge type CCMLI over
conventional CCMLI. The PWM technique used in this work is
Phase Opposition Disposition PWM(PODPWM). The
performance of proposed H-bridge type CCMLI is verified
through MATLAB-Simulink based simulation. It has been
observed that the THD is low in chosen CCMLI compared to
conventional CCMLI.
- In this paper, we introduce a practical mechanism of
compressing a binary phase code modulation (BPCM) signal
according to Barker code with 13 chips in presence of additive
white Gaussian noise (AWGN) by using a digital matched filter
(DMF) corresponding to time domain convolution algorithm of
input and reference signals using Cyclone II EP2C70F896C6
FPGA from ALTERA placed on education and development
board DE2-70 with the following parameters: frequency of
BPCM signal fIF=2 MHz, sampling frequency
f MHz SAM 50
,pulse period
T 200s
, pulse width
S 13sc
, chip width
CH 1sc
, compressing factor
KCOM 13
, SNRinp=1/1, 1/2, 1/3, 1/4, 1/5 and processing
gain factor SNRout/SNRinp=11.14 dB.
The results of filter operation are evaluated using a digital
oscilloscope GDS-1052U to display the input and output signals
for different SNRinp.
Flooding is one of the most devastating natural
disasters in Nigeria. The impact of flooding on human activities
cannot be overemphasized. It can threaten human lives, their
property, environment and the economy. Different techniques
exist to manage and analyze the impact of flooding. Some of these
techniques have not been effective in management of flood
disaster. Remote sensing technique presents itself as an effective
and efficient means of managing flood disaster. In this study,
SPOT-10 image was used to perform land cover/ land use
classification of the study area. Advanced Space borne Thermal
Emission and Reflection Radiometer (ASTER) image of 2010 was
used to generate the Digital Elevation Model (DEM). The image
focal statistics were generated using the Spatial Analyst/
Neighborhood/Focal Statistics Tool in ArcMap. The contour map
was produced using the Spatial Analyst/ Surface/ Contour Tools.
The DEM generated from the focal statistics was reclassified into
different risk levels based on variation of elevation values. The
depression in the DEM was filled and used to create the flow
direction map. The flow accumulation map was produced using
the flow direction data as input image. The stream network and
watershed were equally generated and the stream vectorized. The
reclassified DEM, stream network and vectorized land cover
classes were integrated and used to analyze the impact of flood on
the classes. The result shows that 27.86% of the area studied will
be affected at very high risk flood level, 35.63% at high risk,
17.90% at moderate risk, 10.72% at low risk, and 7.89% at no
risk flood level. Built up area class will be mostly affected at very
high risk flood level while farmland will be affected at high risk
flood level. Oshoro, Imhekpeme, and Weppa communities will be
affected at very high risk flood inundation while Ivighe, Uneme,
Igoide and Iviari communities will be at risk at high risk flood
inundation level. It is recommended among others that buildings
that fall within the “Very High Risk” area should be identified
and occupants possibly relocated to other areas such as the “No
Risk” area.
Without water, humans cannot live. Since time began,
we have lived by the water and vast tracts of waterless land have
been abandoned as it is too difficult to inhabit. At any given
moment, the earth’s atmosphere contains 4,000 cubic miles of
water, which is just 0.000012% of the 344 million cubic miles of
water on earth. Nature maintains this ratio via evaporation and
condensation, irrespective of the activities of man.
There is a certain need for an alternative to solve the water
scarcity. Obtaining water from the atmosphere is nothing new -
since the beginning of time, nature’s continuous hydrologic cycle
of evaporation and condensation in the form of rain or snow has
been the sole source and means of regenerating wholesome water
for all forms of life on earth.
An effective method to generate water is by the separation of
moisture present in air by condensation. In this study, the water
present in air is condensed on the surface of a container and then
collected in an external jacket provided on the container.
Insulations are provided to optimize the inner temperature of the
container.
The method is although uncommon but has certain advantages
which make it a success. The process is economical and does not
require a lot of utilities. It also helps in further reducing the
carbon footprint.
In every moment of functioning the Li-Ion
battery must provide the power required by the user, to have a
long operating life and to and to provide high reliability in
operation. The methods for analysis and testing batteries are
ensuring that all these conditions imposed to the batteries are
met by being tested depending on their intended use.
The success rate of real estate project is
decreasing as there is large scale of project and participation of
entities. It is necessary to study the risk factors involved in the
project. This paper focused on types of risks involved in the
project, risk factors, risk management tools & techniques.
Identification of risk of the project in terms of the total cost of the
project has been divided under Technical, Financial, Sociopolitical
and Statutory cost centers. Large real estate projects
have to tackle the following issues: land acquisition, skilledlabour
shortage, non-availability of skilled project managers, and
mechanization of the construction process to cater to the growing
demands. Non- availability of supporting infrastructure, political
issues like instability of the government leading to regulatory
issues, social issues, marketing forms an important part in these
projects as this is a onetime investment and the purchase cycle is
long , long development period makes the same project be at
different points in the real estate value cycle.
- In the present scenario carbon emission and sand
mining are major concern due to its hazardous effect to
environment and making serious imbalance to the ecosystem.
Various studies have been conducted to reduce severe effect on
environment, using byproducts like copper slag as partial
replacement of fine aggregate. Different researchers have also
revealed numerous uses of copper slag as a replacing agent in
determining the strength of concrete. A comprehensive review of
studies has been presented in this paper for scope of replacement
of fine aggregate from copper slag in concrete
- Security is a concept similar to being cautious
or alert against any danger. Network security is the condition of
being protected against any danger or loss. Thus safety plays a
important role in bank transactions where disclosure of any data
results in big loss. We can define networking as the combination
of two or more computers for the purpose of resource sharing.
Resources here include files, database, emails etc. It is the
protection of these resources from unauthorized users that
brought the development of network security. It is a measure
incorporated to protect data during their transmission and also
to ensure the transmitted is protected and authentic.
Security of online bank transactions here has been
improved by increasing the number of bits while establishing the
SSL connection as well as in RSA asymmetric key encryption
along with SHA1 used for digital signature to authenticate the
user
Background: Septoplasty is a common surgical
procedure performed by otolaryngologists for the correction of
deviated nasal septum. This surgery may be associated with
numerous complications. To minimize these complications,
otolaryngologists frequently pack both nasal cavities with
different types of nasal packing. Despite all its advantages,
nasal packing is also associated with some disadvantages. To
avoid these issues, many surgeons use suturing techniques to
obviate the need for packing after surgery.
Objective: To determine the efficacy and safety of trans-septal
suture technique in preventing complications and decreasing
morbidity after septoplasty in comparison with nasal packing.
Patients and methods: Prospective comparative study. This
study was conducted in the department of Otolaryngology -
Head and Neck Surgery, Rizgary Teaching Hospital - Erbil,
from the 6th of May 2014 to the 30th of November 2014.
A total of 60 patients aged 18-45 years, undergoing septoplasty,
were included in the study. Before surgery, patients were
randomly divided into two equal groups. Group (A) with transseptal
suture technique was compared with group (B) in which
nasal packing with Merocel was done. Postoperative morbidity
in terms of pain, bleeding, postnasal drip, sleep disturbance,
dysphagia, headache and epiphora along with postoperative
complications including septal hematoma, septal perforation,
crustation and synechiae formation were assessed over a follow
up period of four weeks.
Results: Out of 60 patients, 37 patients were males (61.7%)
and 23 patients were females (38.3%). Patients with nasal
packing had significantly more postoperative pain (P<0.05)><0.05). There was no significant difference between
the two groups with respect to nasal bleeding, septal
hematoma, septal perforation, crustation and synechiae
formation.
Conclusion: Septoplasty can be safely performed using transseptal
suturing technique without nasal packing.
The basic reason behind the need to
monitor water quality is to verify whether the examined
water quality is suitable for intended usage or not. This
study is conducted on Al -Shamiya al- sharqi drain in
Diwaniya city in Iraq to make valid assessment for the
level of parameters measured and to realize their effects
on irrigation. In order to assess the drainage water
quality for irrigation purposes with a high accuracy, the
Irrigation Water Quality Index (IWQI) will be examined
and upgraded (integrated with GIS) to make a
classification for drainage water. For this purpose, ten
samples of drainage water were taken from different ten
location of the stuay area. The collected samples were
analyzed chemically for different elements which affect
water quality for irrigation.These elements are :
Calcium(Ca+2), Sodium(Na+
), Magnesium(Mg+2),
Chloride( ), Potassium(K+
), Bicarbonate(HCO3),
Nitrate(NO3), Sulfate( , Phosphate( , Electrical
Conductivity(EC), Total Dissolved Solids (TDS), Total
Suspended Solids (TSS) and pH-values (PH). Sodium
Adsorption Ratio (SAR) and Sodium Content (Na%)
have been also calculated. Results suggest that, the use of
GIS and Water Quality Index (WQI) methods could
provide an extremely interesting as well as efficient tool
to water resource management. The results analysis of
(IWQI) maps confirms that: 52% of the drainage water
in study area falls within the "Low restriction" (LR) and
47%of study area has water with (Moderate
restriction)(MR),While 1% of drainage water in the
study area classified as (Sever restriction) (SR). So, the
drainage water should be used with the soil having high
permeability with some constraints imposed on types of
plant for specified tolerance of salts
The cable-hoisting method and rail cable-lifting
method are widely used in the construction of suspension bridge.
This paper takes a suspension bridge in Hunan as an example,
and expounds the two construction methods, and analyzes their
respective merits and disadvantages.
Baylis-Hillman reaction has been achieved on
different organic motifs but with completion times of three to
six days. Micellar medium of CTAB in water along with the
organic base DABCO has been used to effect the BaylisHillman
reaction on a steroidal nucleus of Withaferin-A for the
first time with different aromatic aldehydes within a day to
synthesize a library of BH adducts (W1a –W14a) and (W1bW14b)
as a mixture of two isomers and W15 as a single
compound. The isomers were separated on column and the
major components were chosen for bio-evaluation. Cytotoxic
activity of the synthesized compounds was screened against a
panel of four cancer cell lines Lung A-549, Breast MCF-7,
Colon HCT-116 and Leukemia THP-1 along with 5-florouracil
and Mitomycin-C as references. All the compounds exhibited
promising activity against screened cell lines and were found to
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DIAGNOSTIC ULTRASOUND FOR THE DETECTION OF ATHEROSCLEROTIC CHANGES INSIDE FEMORAL ARTERIES OF LOWER LIMB
1. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 2, Issue 6 (Nov-Dec 2014), PP. 98-101
98 | P a g e
DIAGNOSTIC ULTRASOUND FOR THE
DETECTION OF ATHEROSCLEROTIC CHANGES
INSIDE FEMORAL ARTERIES OF LOWER LIMB
MUHAMMAD WAQAS AKHTAR
M.Phil-Physics
Affiliated with:-
Department of Physics
The Islamia University of Bahawalpur
waqas_iub@hotmail.com
Postal address: H#636/B-VII, ST#11, Kanju choke near masjid firdus, satellite town. Bahawalpur, Punjab, Pakistan
Abstract- This research study was carried out to see the effect of
atherosclerotic changes inside femoral arteries with the help of
diagnostic Ultrasound. Atherosclerosis in femoral arteries is
meant by any kind of damage to internal thin cell lining of
arterial walls of femoral arteries called as endothelium, which
may be due to consistent or rapid increase in blood pressure or
high level of fat deposition. To see the effect of atherosclerotic
changes in the femoral arteries of some cases, the method of
finding a change along x-axis and y-axis in the structure of
triphasic type of ultrasound image waveform was used. The
change was found to be like the production of biphasic type of
ultrasound image with prolonged portion of diastole and small
peak of systole. In case of monophasic type only low peak systole
occurred with no portion of diastole. Five cases were taken for
study. All these cases had a history of high blood pressure and
use of unbalanced diet in their normal routine. It was concluded
that formation of prolonged diastole along x-axis with low peak
of systole along y-axis in biphasic type of ultrasound image, and
formation of low peak systole along y-axis without any
component along x-axis in monophasic type of ultrasound image,
both are good indicator of atherosclerotic changes in the femoral
arteries.
Keywords- Ultrasonography for femoral arteries, diagnose
femoral arterial disease, Effects of defects in femoral arteries,
femoral arterial disease, images of diseased femoral arteries.
I. INTRODUCTION
Atherosclerotic changes in femoral arteries produce
irregular or turbulent flow of blood through the femoral
arteries and its types which may lead to the death of the
corresponding tissue. Atherosclerosis means any kind of
damage to internal thin cell lining of femoral arterial walls
called as endothelium, which may be due to consistent,
periodical or rapid increase in blood pressure or high level of
fat deposition. Strength of growth of atherosclerosis may be
different is different regions of femoral artery which is termed
as atherosclerotic change in femoral artery. This
atherosclerotic change in the femoral artery is responsible for
the turbulent or irregular flow of blood inside the artery.
First of all it was great Satomura, who described the use
of ultrasound for the determination of normal blood flow
inside the arteries in 1959. [1]
He deduced that this process can
be easily used for the diagnosis of atherosclerosis (Arterial
disease). Domorais D and Johnston KW studied the effect of
aortoiliac disease by using Doppler waveform analysis in 1981
and concluded this method to be good indicator of aortoiliac
disease. [2]
Evans DH and Macpherson DS studied the effect of
proximal stenosis on ultrasound waveforms and concluded
that changes in the shape of waveforms are equivalent to
changes in velocity of blood through the arteries thus showing
the arterial disease. [3]
The shift in the regular normal type of
waveform image can be used to diagnose the blockage of
artery or vessel. [4]
In 2008 Flanigan DP studied to see the
effectiveness of ultrasonography for superficial femoral artery
as compared to ankle brachial index and concluded that the
ultrasonography technique is far better indicator than the ankle
brachial index to determine atherosclerosis in superficial
femoral artery. [5]
Paraskevi and Christos used ultrasound
process for diagnosis of iatrogenic femoral artery in January
2011 and concluded that this process is effective in the
treatment of iatrogenic femoral artery by precutaneous
ultrasound guided thrombin injection.[6]
Walter and christian
used ultrasound in march 2013 for the detection of femoral
artery thrombosis and concluded this method as the effective
method for the purpose of evaluating thrombosis inside
femoral artery.[7]
Marie-ange and samir used ultrasound in
januray 2014 to detect and quantify the lower limb arterial
stenosis and concluded that this method is good for adequate
representation of lower limb arteries and to clinically evaluate
the stenosis for therapy planning.[8]
II. FEMORAL ARTERIES
Femoral arteries starts in the thigh region of human leg, it
is also termed as common femoral artery. After its start in the
thigh region, this artery is further divided into two more
arteries named as Superficial femoral artery and deep femoral
artery. These arteries are responsible for the flow of blood
towards the knee, which is very most important part of human
leg. Hence if any disease in femoral arteries occurs it will
definitely affects the performance of knee. So femoral arteries
get more intention to be diagnosed for atherosclerosis by using
ultrasonography.
III. METHOD AND MATERIALS
Cases were selected according to patient condition in
which patients claimed to have regular high blood pressure.
Five such cases were taken for study and these cases were
diagnosed with the help of Madison ultrasound machine.
Technique of finding any characteristic change in triphasic
type of ultrasound image waveform was used to evaluate
2. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 2, Issue 6 (Nov-Dec 2014), PP. 98-101
99 | P a g e
atherosclerotic changes inside femoral arteries. Each patient
was briefly told about the nature of the examination process
and the patient was laid on his back with straight position for
the diagnosis of superficial femoral artery and for the
diagnosis of deep femoral artery the patient was laid such that
his back now at upper level. The normal healthy condition of
femoral arteries and its types show following pattern on
ultrasound image waveform.
Fig: Triphasic type waveform of femoral arteries
Atherosclerotic changes inside the femoral arteries produces a
change in required triphasic type of waveform in the
ultrasound image. This change can be like as the production of
biphasic type with prolonged diastole along horizontal axis
and reduced peak of systole along vertical axis or the
formation of monophasic type with only low peak systole
along vertical axis without any horizontal components of
diastole. Sometimes a mild spectrum do occurs which disable
to clarify the type of image waveform and its components
along x-axis or y-axis, thus indicates a well strengthen
atherosclerosis. In other words it can be said that production of
biphasic type of waveform with prolonged diastole along x-
axis in ultrasound image indicates a small atherosclerotic
changes in the femoral arteries. Whereas the production of
monophasic type of waveform with low peak systole along y-
axis in ultrasound image indicates the increased
atherosclerotic changes in femoral arteries. The more the shift
occurs in required triphasic type of waveform in the
ultrasound image, more it is indicating the atherosclerotic
changes in the femoral arteries. During this study every case
was observed in this manner so as to have an indication of
atherosclerotic changes in the femoral arteries.
IV. RESULTS AND DISCUSSION
This study use Ultrasonograhpy for detecting the
atherosclerotic changes in the femoral arteries by noticing any
characteristic change along x-axis and y-axis in required
triphasic type of waveform from the femoral arteries. Any
change in this required type of waveforms image is due to the
occurrence of atherosclerotic changes in the femoral arteries.
This must be noticed that not only the whole length of
femoral artery can show change in triphasic type of waveform
image but it can happen that only a small or any particular
region along the whole length of femoral artery may show a
shift in triphasic type of waveform image and then that area
will be termed as the area of atherosclerosis. In case if the
strength of atherosclerosis is well increased that it completely
block the femoral artery then it shows the image with a very
mild spectrum or may show no spectrum. It should be clearly
noticed that no portion of diastole occurs in case if
monophasic type of waveform in ultrasound image is
obtained.
A patient (see image-01) whose both right superficial
femoral and left common femoral artery was diagnosed using
Ultrasonography process and it was found that the right
superficial femoral artery showed biphasic type of waveform
image with low peak systole covering three divisions along y-
axis and prolonged diastole covering two divisions along x-
axis, which indicated the atherosclerotic changes in it. The
common femoral artery also showed biphasic type of
waveform but with very low peak systole covering only one
division along y-axis and little prolonged diastole covering
only one division along x-axis.it indicated atherosclerotic
changes in common femoral artery.
Image-01: left common femoral artery & right superficial
femoral artery
A Patient (see image-02) whose left superficial femoral
artery was diagnosed with the help Ulrasonography process
and it was observed that this artery showed no spectrum, no
systolic peak along y-axis and no component of diastole on x-
axis, indicating increased effect of atherosclerotic changes in
that artery. It means that the left superficial artery of this
patient is completely disturbed by atherosclerosis. This patient
was further evaluated and it came to notice that the patient was
suffering from knee bursitis in left leg. No doubt that was the
effect of large atherosclerosis in left superficial artery which
blocked the normal blood supply as required by the tissues in
the knee.
Image-02: left superficial femoral artery
3. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 2, Issue 6 (Nov-Dec 2014), PP. 98-101
100 | P a g e
A patient (see image-03) whose right common femoral
artery was diagnosed and it showed biphasic type of
ultrasound image waveform covering two divisions along x-
axis and as well as the spectrum showed mildness in some
certain regions along x-axis and at its low peak systole
covering 01 division along y-axis. This indicates the increase
growth of atherosclerosis in that artery which can rapidly grow
to produce more atherosclerotic changes in this artery.
Image-03: right common femoral artery
A patient (see image-04) whose both right common
femoral and right superficial artery were diagnosed and it was
noticed that both of these arteries show biphasic type of
waveform image with diastole prolonged after one cycle
which covered one and half divisions along x-axis and
covering three division along y-axis with peak systole. Hence
indicating the presence of small atherosclerotic changes in that
artery. Further it was also noticed the right common femoral
artery also showed some mildness in the spectrum along x-
axis region of diastole, which indicated that right common
femoral artery carries little more atherosclerotic changes than
the right superficial femoral artery.
Image-04: right common femoral artery & right
superficial femoral artery
A patient (see image-05) whose both left superficial
artery and left common femoral artery were diagnosed. It was
seen that markedly dampened monophasic type of waveform
image was obtained from both of these arteries both carrying
low peak systole covering two division along y-axis and no
portion of diastole along x-axis. It means that both of these
arteries carry a large strength of atherosclerotic changes. That
patient was further evaluated and it was found that cellulitis
occurs in the lower thigh region and calves. No doubt it was
due to poor condition of left common femoral artery and left
superficial artery which affects the inner tissue of that region.
Hence the presence of large degree atherosclerosis in both of
these arteries produce it worse effects on lower thigh region
and calves.
Image-05: left superficial & left common femoral artery
V. CONCLUSION
It is been concluded that when any of femoral artery
carries atherosclerotic changes, then it produces characteristic
changes in triphasic type of ultrasound image along x-axis and
y-axis with the formation of new type of ultrasound image. In
the formation of biphasic type of ultrasound image the diastole
is prolonged to more than two divisions along x-axis with low
peak systole covering three divisions along y-axis and in the
formation of monophasic type of ultrasound images the
systole peak is reduced and it covers only three divisions
along y-axis and produce no portion of diastole along x-axis.
Both of these are better indicator of atherosclerotic changes in
femoral arteries. So whenever such change is noticed in the
ultrasound image waveforms then atherosclerotic changes are
the most occurring factors in the femoral arteries.
REFERENCES
[1] Satomura S. study of the flow patterns in peripheral arteries
by ultrasonics. J Acoust soc Japan 1959; 15:151-8
[2] Demorais D, Jhonston KW. Assesment of aortoiliac disease
by non-invasive quantative Doppler waveform analysis. Br
J surg 1981;68:782-92
[3] Evans DH, Macpherson DS, Bentley S, Asher MJ, Bell
PRF. The effect of proximal stenosis on Doppler
waveforms: a comparison of three methods of waveform
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analysis in an animal model. Clin phys Physiol Meas
1981;2:17-25.
[4] Persson AV, Gibbons G, Griffey S. Noninvasive evaluation
of the aortoiliac segment. J cardiovas surg 1981;22:539-42
[5] J Vasc Surg. 2008 Apr;47(4):789-92; discussion 792-3. doi:
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[6] Paraskevi A Vlachou, Christos D. Karkos, Salena Bains,
Mark J. McCarthy, Fishwick, Amman Bolia. Precutaneou
ultrasound guided thrombin injection for the treatment of
iatrogenic femoral artery pseudoaneurysms. Vol 07, issue
01, p# 172-17 January 2011.
[7] Walter Knirsch, Christian Kellenberger, Sven Dittrich,
Peter Ewert, Martin Lewin, Reinald Motz, Jan
Nürnberg, Oliver Kretschmar. Femoral Arterial
Thrombosis After Cardiac Catheterization In Infancy:
Impact of Doppler Ultrasound for Diagnosis. Volume
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[8] Marie-Ange Janvier∗, Samir Merouche∗, Louise
Allard, Gilles Soulez, Guy Cloutier.
A 3-D Ultrasound
Imaging Robotic System to Detect and Quantify Lower
Limb Arterial Stenoses. Volume 40, Issue 1, P# 232–243,
January 2014