**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**1934

# Search results for: the attenuation coefficient

##### 1934 Simulation of Gamma Rays Attenuation Coefficient for Some common Shielding Materials Using Monte Carlo Program

**Authors:**
Cherief Houria,
Fouka Mourad

**Abstract:**

**Keywords:**
gamma photon,
Monte Carlo program,
radiation attenuation,
shielding material,
the linear attenuation coefficient

##### 1933 Validation of the Formula for Air Attenuation Coefficient for Acoustic Scale Models

**Authors:**
Katarzyna Baruch,
Agata Szelag,
Aleksandra Majchrzak,
Tadeusz Kamisinski

**Abstract:**

**Keywords:**
air absorption correction,
attenuation coefficient,
dimensional analysis,
model study,
scaled modelling

##### 1932 The Contribution of Density Fluctuations in Ultrasound Scattering in Cancellous Bone

**Authors:**
A. Elsariti,
T. Evans

**Abstract:**

**Keywords:**
ultrasound scattering,
sound speed,
density fluctuations,
attenuation coefficient

##### 1931 Adobe Attenuation Coefficient Determination and Its Comparison with Other Shielding Materials for Energies Found in Common X-Rays Procedures

**Authors:**
Camarena Rodriguez C. S.,
Portocarrero Bonifaz A.,
Palma Esparza R.,
Romero Carlos N. A.

**Abstract:**

**Keywords:**
Adobe,
attenuation coefficient,
radiological protection,
shielding,
x-rays

##### 1930 Using Probabilistic Neural Network (PNN) for Extracting Acoustic Microwaves (Bulk Acoustic Waves) in Piezoelectric Material

**Authors:**
Hafdaoui Hichem,
Mehadjebia Cherifa,
Benatia Djamel

**Abstract:**

**Keywords:**
piezoelectric material,
probabilistic neural network (PNN),
classification,
acoustic microwaves,
bulk waves,
the attenuation coefficient

##### 1929 Water Depth and Optical Attenuation Characteristics of Natural Water Reservoirs nearby Kolkata City Assessed from Hyperion Hyperspectral and LISS-3 Multispectral Images

**Authors:**
Barun Raychaudhuri

**Abstract:**

**Keywords:**
hyperion,
hyperspectral,
Kolkata,
water depth

##### 1928 Water Equivalent from the Point of View of Fast Neutron Removal Cross-Section

**Authors:**
Mohammed Alrajhi

**Abstract:**

**Keywords:**
cross-section,
neutron,
photon,
coefficient,
mathematics

##### 1927 The Affect of Water Quality on the Ultrasonic Attenuation of Bone Mimic

**Authors:**
A. Elsariti,
T. Evans

**Abstract:**

**Keywords:**
bone mimic,
porosity,
tap water,
distilled water,
ultrasonic attenuation

##### 1926 Heat and Radiation Influence on Granite-Galena Concrete for Nuclear Shielding Applications

**Authors:**
Mohamed A. Safan,
Walid Khalil,
Amro Fathalla

**Abstract:**

**Keywords:**
concrete,
galena,
shielding,
attenuation,
radiation

##### 1925 The Mass Attenuation Coefficients, Effective Atomic Cross Sections, Effective Atomic Numbers and Electron Densities of Some Halides

**Authors:**
Shivalinge Gowda

**Abstract:**

_{2}, CdI

_{2}and HgI

_{2}were determined at photon energies 279.2, 320.07, 514.0, 661.6, 1115.5, 1173.2 and 1332.5 keV in a well-collimated narrow beam good geometry set-up using a high resolution, hyper pure germanium detector. The mass attenuation coefficients and the effective atomic cross sections are found to be in good agreement with the XCOM values. From these mass attenuation coefficients, the effective atomic cross sections s

_{a,}of the compounds were determined. These effective atomic cross section s

_{a}data so obtained are then used to compute the effective atomic numbers Z

_{eff}. For this, the interpolation of total attenuation cross-sections of photons of energy E in elements of atomic number Z was performed by using the logarithmic regression analysis of the data measured by the authors and reported earlier for the above said energies along with XCOM data for standard energies. The best-fit coefficients in the photon energy range of 250 to 350 keV, 350 to 500 keV, 500 to 700 keV, 700 to 1000 keV and 1000 to 1500 keV by a piecewise interpolation method were then used to find the Z

_{eff}of the compounds with respect to the effective atomic cross section s

_{a}from the relation obtained by piece wise interpolation method. Using these Z

_{eff}values, the electron densities N

_{el}of halides were also determined. The present Z

_{eff}and N

_{el}values of halides are found to be in good agreement with the values calculated from XCOM data and other available published values.

**Keywords:**
mass attenuation coefficient,
atomic cross-section,
effective atomic number,
electron density

##### 1924 An Ultrasonic Approach to Investigate the Effect of Aeration on Rheological Properties of Soft Biological Materials with Bubbles Embedded

**Authors:**
Hussein M. Elmehdi

**Abstract:**

**Keywords:**
ultrasound,
soft biological materials,
velocity,
attenuation

##### 1923 The Effect of the Acquisition and Reconstruction Parameters in Quality of Spect Tomographic Images with Attenuation and Scatter Correction

**Authors:**
N. Boutaghane,
F. Z. Tounsi

**Abstract:**

**Keywords:**
attenuation,
scatter,
reconstruction filter,
image quality,
acquisition and reconstruction parameters,
SPECT

##### 1922 Acoustic Wave Propagation to Locate and Evaluate Obstructions in Dam Seepage Drains

**Authors:**
André Taras,
Mathieu Soares,
M. Rodriguez,
M. Argouges

**Abstract:**

**Keywords:**
acoustic,
wave propagation,
drains,
calcite,
dams

##### 1921 Design of a Portable Shielding System for a Newly Installed NaI(Tl) Detector

**Authors:**
Mayesha Tahsin,
A.S. Mollah

**Abstract:**

**Keywords:**
shield,
NaI (Tl) detector,
gamma radiation,
intensity,
linear attenuation coefficient

##### 1920 Effect of Wind and Humidity on Microwave Links in North West Libya

**Authors:**
M. S. Agha,
A. M. Eshahiry,
S. A. Aldabbar,
Z. M. Alshahri

**Abstract:**

**Keywords:**
: Attenuation,
scattering,
transmission loss.

##### 1919 On Coverage Probability of Confidence Intervals for the Normal Mean with Known Coefficient of Variation

**Authors:**
Suparat Niwitpong,
Sa-aat Niwitpong

**Abstract:**

**Keywords:**
confidence interval,
coverage probability,
expected length,
known
coefficient of variation

##### 1918 Quantifying Wave Attenuation over an Eroding Marsh through Numerical Modeling

**Authors:**
Donald G. Danmeier,
Gian Marco Pizzo,
Matthew Brennan

**Abstract:**

**Keywords:**
green infrastructure,
wave attenuation,
wave modeling,
wetland

##### 1917 Investigation of the Turbulent Cavitating Flows from the Viewpoint of the Lift Coefficient

**Authors:**
Ping-Ben Liu,
Chien-Chou Tseng

**Abstract:**

**Keywords:**
Computational Fluid Dynamics,
cavitation,
turbulence,
lift coefficient

##### 1916 The Brain’s Attenuation Coefficient as a Potential Estimator of Temperature Elevation during Intracranial High Intensity Focused Ultrasound Procedures

**Authors:**
Daniel Dahis,
Haim Azhari

**Abstract:**

**Keywords:**
attenuation coefficient,
brain,
HIFU,
image-guidance,
temperature

##### 1915 Attenuation Scale Calibration of an Optical Time Domain Reflectometer

**Authors:**
Osama Terra,
Hatem Hussein

**Abstract:**

**Keywords:**
optical time domain reflectometer,
fiber attenuation measurement,
OTDR calibration,
external source method

##### 1914 Effect of Wind and Humidity on Microwave Links in West North Libya

**Authors:**
M. S. Agha,
A. M. Eshahiry,
S. A. Aldabbar,
Z. M. Alshahri

**Abstract:**

**Keywords:**
attenuation,
de-polarization,
scattering,
transmission loss

##### 1913 Lamb Waves Propagation in Elastic-Viscoelastic Three-Layer Adhesive Joints

**Authors:**
Pezhman Taghipour Birgani,
Mehdi Shekarzadeh

**Abstract:**

**Keywords:**
three-layer adhesive joints,
viscoelastic,
lamb waves,
global matrix method

##### 1912 Dependence of the Photoelectric Exponent on the Source Spectrum of the CT

**Authors:**
Rezvan Ravanfar Haghighi,
V. C. Vani,
Suresh Perumal,
Sabyasachi Chatterjee,
Pratik Kumar

**Abstract:**

**Keywords:**
attenuation coefficient,
computed tomography,
photoelectric effect,
source spectrum

##### 1911 Predicting Trapezoidal Weir Discharge Coefficient Using Evolutionary Algorithm

**Authors:**
K. Roushanger,
A. Soleymanzadeh

**Abstract:**

**Keywords:**
discharge coefficient,
genetic expression programming,
trapezoidal weir

##### 1910 Numerical Study of Flow around Flat Tube between Parallel Walls

**Authors:**
Hamidreza Bayat,
Arash Mirabdolah Lavasani,
Meysam Bolhasani,
Sajad Moosavi

**Abstract:**

**Keywords:**
laminar flow,
flat-tube,
drag coefficient,
cross-flow,
heat exchanger

##### 1909 Modeling of Digital and Settlement Consolidation of Soil under Oedomete

**Authors:**
Yu-Lin Shen,
Ming-Kuen Chang

**Abstract:**

**Keywords:**
EMAT,
artificial defect,
NDT,
ultrasonic testing

##### 1908 The Design Optimization for Sound Absorption Material of Multi-Layer Structure

**Authors:**
Un-Hwan Park,
Jun-Hyeok Heo,
In-Sung Lee,
Tae-Hyeon Oh,
Dae-Kyu Park

**Abstract:**

**Keywords:**
sound absorption material,
sound impedance tube,
sound absorption coefficient,
optimization design

##### 1907 Design Study for the Rehabilitation of a Retaining Structure and Water Intake on Site

**Authors:**
Yu-Lin Shen,
Ming-Kuen Chang

**Abstract:**

**Keywords:**
EMAT,
artificial defect,
NDT,
ultrasonic testing

##### 1906 A Study on the Determinants of Earnings Response Coefficient in an Emerging Market

**Authors:**
Bita Mashayekhi,
Zeynab Lotfi Aghel

**Abstract:**

**Keywords:**
earnings response coefficient (ERC),
return response coefficient (RRC),
firm size,
earnings growth,
earnings persistence

##### 1905 Liquid Temperature Effect on Sound Propagation in Polymeric Solution with Gas Bubbles

**Authors:**
S. Levitsky

**Abstract:**

**Keywords:**
sound propagation,
gas bubbles,
temperature effect,
polymeric liquid