Search or add a thesis

Advanced Search (Beta)
Home > Acoustic Scattering from Different Geometries Eigenfunction Mode Matching Technique

Acoustic Scattering from Different Geometries Eigenfunction Mode Matching Technique

Thesis Info

Access Option

External Link

Author

Bashir, Amna

Program

PhD

Institute

COMSATS University Islamabad

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Mathemaics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/13939/1/Amna_Bashir_Maths_HSR_2018_CIIT.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725430793

Similar


In this thesis we solve and compare two tri and penta furcated waveguide problems having rigid and soft lining by using mode matching technique. We also study the phenomenon of extraordinary acoustic transmission (EAT) in Helmholtz resonator. It is shown that combination of a single propagating mode and symmetry orthogonal to direction of propagation leads to EAT. This is accomplished by decomposing the problem using symmetry, the Blaschke product and the properties of functions of a single complex variable which have modulus one on the real axis. A detailed numerical study has been presented to analyze reflection and transmission behaviour to probe the acoustic radiated energy. These results can be used in noise reduction devices and theory of acoustics.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

94. Al-Sharh/The Expansion

94. Al-Sharh/The Expansion

I/We begin by the Blessed Name of Allah

The Immensely Merciful to all, The Infinitely Compassionate to everyone.

94:01
a. O The Prophet!
b. Have WE not opened up your heart,

94:02
a. and relieved you of your burden,

94:03
a. which had weighed heavily upon your back/mind?

94:04
a. And WE elevated the mention of your name in eminence and fame.

94:05
a. And so it is that with every hardship, indeed, there would always be ease/relief;

94:06
a. with every hardship, indeed, there would always be ease/relief.

94:07
a. So when you get free from routine work,
b. turn to devotion and exert yourself in worship,

94:08
a. and turn towards your Rabb - The Lord in awe and humbleness,
and let HIM be your quest!

A Quantitative Analysis of Agro-Based Industry in Matiari District, Sindh, Pakistan: A Sociological Perspective

Pakistan is the agrarian country and its last economic data shows the growth in the agriculture production. More than 60 percent population is living in rural areas of the country and is engaged with agriculture activities. While the agro based industry is linked with agriculture sector and use agriculture raw material for production of final goods. The agro based industry provides income and employment generation opportunities. Therefore, the agro based industry is beneficial for the economic development of the area. For this study the 384 sample has been selected from the district Matiari and statistical Chi square test result highlights that the agro-based industry is beneficial for the development of the rural area.

Cumulative Effect of Rhizobium and Phosphate Solubilizing Bacteria on Yield, Nutrient Uptake and Growth Parameters in Chickpea under Rainfed Conditions

Nitrogen and phosphorus are the plant nutrients that play important role in crop growth and development. Inoculation with nitrogen fixers or phosphate solubilizing bacteria (PSB) may support the field crops in improvement of yield and quality. Nitrogen fixers not only provide N to plants but also improve the fertility status of soil. Similarly PSB can play important role in supplying phosphorus in an environmental friendly and sustainable manner. Chickpea is an important legume crop of Pakistan mainly grown in rainfed area. So, co-inoculation of rhizobium and phosphate solubilizing bacteria was studied to enhance the yield and nodulation of chickpea under rainfed conditions. The rhizobiums were isolated from the nodules of chickpea crop grown at rainfed area and PSB from the rhizosphere soil of rainfed chickpea crop. These isolates were screened for growth promotion of chickpea seedling under axenic conditions. All the isolates were found effective in improving the chickpea seedling growth with variable potential. The combination of three best rhizobium and three best PSB isolates were also screened for three best findings. Then these treatments were evaluated in pot and field studies under rainfed conditions for their effect on chickpea crop. Normal agronomic practices were followed till crop maturity. The inoculation and co- inoculation significantly boosted the grain yield, nodulation and growth parameters over the control. The yield increase was observed 35% for pot trial and 41% and 34% respectively for two years field experiments. The NP contents and uptake was also noted in increasing trend by the inoculation. The study revealed that yield and nodulation of chickpea was significantly improved over control with the sole inoculation of rhizobium and PSB strains, but co- inoculation reflected the more increase in growth and nodulation compared with single inoculation.