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Scattering of Dipole Field from a Long Finite Cylinder

Thesis Info

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Author

Illahi, Ahsan

Program

PhD

Institute

Quaid-I-Azam University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2009

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/1805

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727135857

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Radiation of an arbitrarily oriented dipole and its scattering from a long finite circular cylinder is determined. Cylinder of perfect electric conductor, impedance and perfect electromagnetic conductor has been considered for the analysis. An approxi- mate method has been proposed and utilized to obtain the solution. The approximate method consists of two main steps. In the first step, the current distribution on the infinite length cylinder is determined. Then the portions of the infinite cylinder above and below certain finite length are removed with the assumption that the current on the remaining portion of the cylinder is unchanged. Hence by utilizing this current distribution corresponding to infinite cylinder, field due to a long finite cylinder has been obtained. This approximation is valid analytically if the cylinder is very long as compared to its radius. Numerical results have been validated by comparing with the published literature under some special conditions and are found in good agreement with them.
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شفیق آصف

آؤ خود کو ڈھونڈتے ہیں،،

جانے کب سے کھو چکا ہوں شہر میں

جانے کب سے اپنا چہرہ ڈھونڈتا پھرتا ہوں میں

شہر کے ان راستوں میں

کس قدر تنہائی ہے

ہر کوئی تنہائیوں کی

بھیڑ میں کھویا ہوا ہے

یوں تو سورج کا اجالا ضوفشاں ہے

پھر بھی گلیوں میں ابھی تک

تیرگی سی ہے رواں

ایسے عالم میں بھلا ہم

کیسے ڈھونڈیں خود کو اپنے شہر میں

شہر اپنا ہےمگر ہم

ڈھونڈتے پھرتے ہیں خود کو

جانے کب دیکھیں گے ہم اک آشنا چہرہ کوئی

گر یہاں کوئی ہمارا آشنا چہرہ نہیں تو

آؤ خود کو ڈھونڈ لیں

آؤ خود کو دیکھ لیں

شہر کی اس بھیڑ میں

أحكام الحرابة و إختطاف الطائرات

This research article consist unique study regarding constitution of Human being character building in the thoughts of eminent philosopher Shah Wali Ullah (1703-1764). In present critique the focus has been made to explore how individual characters build in the specific environments? How surrounding effects on the character building? Moreover linkage of Islamic ‘IB└DA and its positive impact on the Muslim society has been explored. In interpretation of Shah Wali Ullah, All ‘IB└DA are like tools which lead to generate four basic ethics i.e purity and transparency capitulation, gainful and abstinence. These are the basic moral code which are the ultimate result of the four kind of ‘IB└DA i.e prayer, fasting, zakat and hajj. Muslim has inestimable inner power in the form of six lat┐’ef )اطلفئ, )which ultimately resulted upon the change of behavior. Character building are etiquettes, noble practices, decentness and good morality. It is generally refers to a code of conduct, that an individual group or society hold as authoritative in distinguishing right from wrong. Ethics are phenomenon values and can develop up to reasonable universal standards. Conduct in Islam governs all aspects of life and specifically addresses such principles as truthfulness, honesty, trust, sincerity, brotherhood and justice, while Islam forbid false, conspiracy, dodge, rude, irascibility, corruption. To materialize the virtues and disgrace the fake a role model prophet Muhammad (S.A.W) were deputed from Allah to guide the human being. So In present article character building in the theory of Shah Wali Ullah especially while in other Muslims scholars in general has diagnosed.

Determining Forage Production Potential of Maize Sown As a Mixture With Different Legumes under Different Nitrogen Applications

Two field experiments to study the agro-quantitative and qualitative response of forage maize sown alone and as a mixture with forage legumes were conducted at the Agronomic Research Area, University of Agriculture, Faisalabad, Pakistan, during the year 2005 and 2006. The sole crops and blended seed mixtures were sown in 30 cm apart rows with the help of single row hand drill. Experiment-I was replicated three times in randomized complete block design (RCBD), while the experiment-II was laid out in randomized complete block design with factorial arrangement, measuring a net plot size of 2.4 m x 8 m. First experiment comprised of thirteen treatments i.e. maize alone (100%), 75%maize + 25%cowpea, 50%maize + 50%cowpea, 25%maize + 75%cowpea, cowpea alone (100%), 75%maize + 25%sesbania, 50%maize + 50%sesbania, 25%maize + 75%sesbania, sesbania alone (100%), 75%maize + 25%cluster bean, 50%maize + 50%cluster bean, 25%maize + 75%cluster bean and cluster bean alone (100%). Mixed cropping of maize with different legumes significantly affected the growth, yield and quality of forage. The maize sown in mixture with sesbania at seed ratio of 75%+25% produced significantly higher mixed green and dry matter yield than all other seed ratios of maize in combination with any legume. The yields of all sole legumes (Cowpea, Sesbania and Cluster bean) were significantly lower than sole maize. The lowest green forage yield (16.92 t ha -1 ) and dry matter yield (3.52 t ha -1 ) was recorded when cluster bean was sown as sole crop. All maize + sesbania produced higher CP% and EEF% of mixed forage than mixtures of maize with cowpea and cluster bean at similar seed ratios. Land equivalent ratio was also highest in maize + sesbania mixture at 75:25 seed ratio. In the second experiment response of forage maize sown alone and mixture with different legumes i.e. cowpea, sesbania and cluster bean at seed ratio of 75% + 25%was evaluated at nitrogen levels of 0, 50, 100 and 150 kg ha -1 . The forage and dry matter yield of sole maize was increased significantly up to 150 kg N ha -1 , while the application of 150 kg N ha -1 to all maize-legume mixtures had a depressing effect on yields. Maize + sesbania mixture fertilized at 100 kg N ha -1 gave the highest mixed forage yield, dry matter yield and economic benefits (Net benefit and BCR).