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DoS attacks and their mitigation on software-defined networking SDN

Thesis Info

Author

Maryam Zulfiqar

Supervisor

Umara Zahid

Department

Department of Computer Science and Software Engineering

Program

BCS

Institute

International Islamic University

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Page

xv, 101

Subject

Computer Science

Language

English

Other

BS 005.8 MAD

Added

2021-02-17 19:49:13

Modified

2023-02-17 21:08:06

ARI ID

1676724181939

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2۔ اہل اور تربیت یافتہ حکام کا انتخاب و تقرر

حکام بالا ،بااختیارمقتدر عہدیداران اور ملازمین و اہلکاروں کے بغیر نظام حکومت نہیں چل سکتا ۔ حکام میں صدر ، وزیراعظم ، گورنرز، وزرا ءسےمشیروں تک، قضاۃ سے لے کر فیصلہ لکھنے والوں تک اور مفتیان کرام تک سب شامل ہیں ۔ ان سب مناصب پر اہل ، ایماندار اور قابل لوگوں کا تقرر لازمی امر ہے ۔ ان حکام کے انتخاب کے لیے شریعت مطہرہ نے اصول و ضوابط مقرر فرمائے ہیں جو کہ مندرجہ ذیل ہیں:
2.1ریاستی عہدوں پر اہل افراد کا تقرر
سیاست کا ایک بنیادی اصول یہ ہے کہ ریاست میں انتظامی امورکی انجام دہی کے لیے تمام عہدوں اور مناصب پر اہل، باصلاحیت اور ایماندار افراد کا تقرر کیا جاناچاہئے ۔ حکومت کے اختیارات اور اموال اللہ اور اس کے رسول ﷺ کی امانت ہیں جنہیں خداترس، ایماندار اور عادل لوگوں کے سپردکیا جانا چاہئے اور اس امانت میں کسی شخص کواپنی مرضی کے مطابق ، یا نفسانی اغراض کے لئے استعمال کرنے کاحق نہیں ہے ۔ جب کسی منصب پرکسی نااہل شخص کا تقرر ہوتا ہے تومعاشرہ میں بدامنی، ظلم وزیادتی اور بے چینی کا آنا لازمی امر ہے، جیسا کہ حضرت ابو ہریرہؓ سے روایت ہے
"فَإِذَا ضُیِّعَتِ الأَمَانَۃُ فَانْتَظِرِ السَّاعَۃَ، قَال کَیْفَ إِضَاعَتُہَا؟قَال إِذَا وُسِّدَ الأَمْرُ إِلَی غَیْرِ أَھلِہِ فَانْتَظِرِ السَّاعَۃَ ۔" 345
’’ جب امانت ضائع کردی جائے تو پھر قیامت کا انتظار کرو۔ پوچھا کہ یا رسول اللہ امانت کیسے ضائع ہوگی۔ آپ ﷺنے جواب دیا کہ جب کوئی منصب کسی نا اہل کے سپرد کردیا جائے تو پھر قیامت کا انتظار کرو۔ ‘‘
اقربا پروری، تعلقات اورسفارش کی بنیاد پر جب عہدے تقسیم کیے جاتے ہیں تو اس کا نتیجہ یہ نکلتا ہے کہ نااہل اورناتجربہ کار لوگ عہدوں پر قابض ہو کر خلق خدا کو پریشان کرتے ہیں اور نظامِ حکومت برباد ہو...

العلامة شائسته جل و خدماته العلمية الدينية السياسية

This article highlights the religious, literary and political work of Moulana ShÉista Gul famous by the name of Mathe Mulla of Khyber Puktun Khawa (1303 A. H-1401A. H. 1886A. D-1981A. D MardÉn) He was well-known scholar of Qura’n, ×adith and Fiqah, his great contribution was to promote political awareness in the community with the concept ofTwo Nations Theory by his affiliation with Muslim League under the leadership of Quaid-eAÐam Muhammad Ali JinnaÍ. He was the convener of Jamiat ul AÎfia which was organized by the eminent religious leaders of that time to implement Sharia law in Pakistan. He was devoted to make Islam a living reality during his life time, his literary work is aimed to improve human communication and develop a better understanding among the people of this region. His monumental work was originally in Pashto widely spoken and understood in the North West of Pakistan. He was teaching and preaching Islam nearly in a span of seventy years. The main objective was to alleviate the deteriorating conditions of the Muslim society and to defend it from external threats. He emphasized to bring change and correct the wrong believes and detrimental actions. His theological doctrines influenced his followers and decedents who promoted his mission in the light of writings and ideas expressed by him.

A Pedological Study and its Relationship to Halophytic Plants Along Coastal and Inland Areas of Karachi, Pakistan

The present study explores the elemental concentrations (and their ratios) in halophytes and their associated soils. The elemental composition of rocks have also been evaluated in this research to find out the influence of rock on the composition of soils. The study area embraces a coastal strip of the southwestern border of Karachi–a part of Sindh coast, located in the southern part of Pakistan. The results of the coastal site were compared with the findings of the inland site which was located in Karachi University campus. The coastal lithological units of Nari and Gaj formations showed a distinct influence on the chemical composition of soils over which the halophytes grow. The geochemistry, petrography and X–ray diffraction analyses of the rock samples revealed that most likely the sands, clay minerals, Fe, K, Ca and Mg in the soils were attributed from the coastal lithologies of the aforementioned formations. However, Na and Cl ions in the coastal soils were mainly contributed from the sea (revealed through both SEM-EDS and wet chemical analyses). A Significant negative correlation between sand and chloride (Cl−) content in both inland and coastal soils revealed that as expected sands do not possess cation exchange capacity. However, clays showed a strong positive correlation with exchangeable Na compared with other cations (K, Ca and Mg) in coastal soils. The soil’s pH represented negative correlation with electrical conductivity (EC) and chloride (Cl−) in both types of soils. The inorganic cations (Na, K, Ca and Mg) were accumulated in different amounts in plant parts (roots, stems and leaves) of the selected halophytes. Both inland and coastal populations of Atriplex griffithii, Haloxylon recurvum, Salsola imbricata and Suaeda fruticosa while coastal populations of Avicennia marina, Cyperus conglomeratus, Ipomoea pes-caprae, Tamarix indica, Trianthema triquetra showed an increase in Na from roots to stems to leaves. Most of these aforementioned halophytes displayed decrease in K and Ca concentrations from roots to stems to leaves as the Na amount increased. Generally, the roots of both inland and coastal halophytes displayed Ca > Na > K > Mg accumulation, whereas, stems and leaves exhibited Na > Ca > K > Mg sequence for both types of populations. The mutual interaction between Na, K, Ca and Mg in soils and in roots, stems and leaves of xvi halophytes showed interesting results. The coastal soils represented a strong positive relationship between Na vs. K and Na vs. Ca. Plant parts (roots, stems and leaves) revealed positive correlations between Na vs. K and negative correlations between Na vs. Ca in majority of the halophytes. The results of principal component analysis (PCA) for inland soil variables revealed that presumably Cl−, Na, and Mg ions were responsible for soil salinity at inland site. The NO3–N concentration in inland soil samples showed positive correlation with K in the second component which might be due to sewage influx in inland soils. The positively related Ca and SO4 in third component were possibly due to gypsiferous shale from Mulri hills exposed opposite to the inland site (the University of Karachi Campus area). The PCA of coastal soils represented high positive loads of Ca and Mg in the first component which indicated the influence of calcareous rocks of Nari and Gaj formations. The second component followed available P > SO4 > K > Cl > Na trend, whereas, the third component showed a high positive load for NO3–N while negative load for Cl ions. On the basis of bioconcentration factor (BCF) for Na (BCFNa), inland populations of Cressa cretica, Haloxylon recurvum and Suaeda fruticosa while coastal populations of Arthrocnemum macrostachyum and Trianthema triquetra were more salt tolerant halophytes. However, inland populations of Atriplex griffithii while coastal populations of Heliotropium currassavicum and Trianthema portulacastrum were relatively less salt tolerant halophytes; these plants possessed the more bioconcentration factor for K (BCFK). The results of cluster analysis were found to be congruent with the results of bioconcentration factor (BCF) of elements. Two Factor ANOVA (Analysis of Variance) revealed that Na content for plant parts and species differed markedly for both inland and coastal data across all stations. Magnesium amount represented remarkable differences for species and interactions (parts × species) for all inland and coastal stations. Through one-way MANOVA (multivariate analysis of variance) it was found that inland and coastal populations of Atriplex griffithii, Ipomoea pes-caprae exhibited significant difference in the accrual of all elements (Na, K, Ca and Mg). However, both populations of Salsola imbricata and Suaeda fruticosa possessed strong significant effect of parts on the accumulation xvii of Na, K, and Ca. Among micronutrients (Cu, Fe, Mn and Zn), Cu and Zn were deficient while Fe and Mn were ample in almost all soils. However, the concentrations of these micronutrients were found to be greater in inland plants than coastal populations. Coastal populations represented increasing trends for Cu and Fe from roots to stems to leaves.