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Investigating of Nano Composite Materials for out Door Insulation Applications

Thesis Info

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Author

Muhammad Ali

Program

PhD

Institute

University of Engineering and Technology

City

Taxila

Province

Punjab

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Subject

Electrical Engineering

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/13276/1/4.%20Final%20Thesis%20Muhammad%20Ali%20%2809-PhD-EE-38%29.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727781574

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This research deals with the preparation of silicone rubber (SiR), epoxy and EPDM based composite materials for outdoor high voltage insulationapplications. These composites were fabricated by incorporating nanosilica 2.5~5 % by weight, while the microsilica loading were varied from 10~20 % by weight. Uniform and homogenous dispersion of fillers were achieved through process parameters optimization. The tensile strength of fabricated polymer compositesincreases with the incorporation of filler contents. Even in case of hybrid composites, it increases up to 400 %. The prepared composite samples were found thermally more stable than their virgin counterparts. An approximate 25% increase in dielectric strength was also obtained. The novelty of the research work is promise of nano and hybrid composite towards their aging performance under multi-stress conditions. To comprehend the aging phenomena (weathering characteristics) under multi-stress conditions, the entirepolymer composites were aged for a maximum of 5,000 hrs in a multi-stress aging chamber developed as per IEEE standard 1109. Different stresses like ultraviolet, thermal, salt-fog, acid rain and voltage were applied for specifically designed weather cycles. After multi-stress aging according to the data of hydrophobicity loss silicone rubber composites were placed in HC-3 while epoxy and EPDM composites were grouped in HC-4 and HC-5 respectively. The results of leakage current during the multi-stress aging for silicone rubber, epoxy and EPDM composites were found 0.8μA, 1μA and 1.2μA correspondingly. The hybrid polymer composites due to synergic effects responded better towards aging. Percentage deterioration of fabricated compositesalso demonstrated that hybrid composites performed better thannano and micro composites respectively.
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نقاد کی خوبیاں اور ذمہ داریاں

موضوع2:نقاد کی خوبیاں اورذمہ داریاں
• اچھا نقاد وہ ہوتا ہے جس میں مندرجہ ذیل خوبیاں پائی جائیں۔
• اچھا نقاد فن پارے پر رائے دیتے ہوئے ہمیشہ سچائی سے کام لیتا ہے۔
• مبالغہ آرائی سے پرہیز کرتاہے • تعصب سے پاک ہو
• غیر جانب دارہو • ہٹ دھرم اور ضدی نا ہو
• مالی فائدے کے لیے نا لکھے۔
• اچھا نقاد محنتی ہوتا ہے اور جانفشانی سیکام کرتا ہے۔
• اچھا نقاد بے صبری اور عجلت کا مظاہرہ نہیں کرتا
• اختلاف کی جرات ہونی چاہیے۔
• ضعیف الاعتقاد نا ہو • اچھے حافظے کا مالک ہو
• نقاد کی رائے قطعی او ر حتمی ہوتی ہے۔
• مختلف زبانوں کا ما ہرہو
• مختلف اصطلاحات کے بارے میں آگاہی رکھتا ہو
• اس کا اسلوب عام فہم ہو اور تحریر سادہ ہو
• اچھا نقاد وہ ہے جس کا مزاج بھی تنقید والا ہو۔
• فن کی عمارت تنقید پر کھڑی ہوتی ہے۔
بقول ڈاکٹر محی الدین قادری:
" صحیح نقاد وہ ہے جو خوبیوں پر نظر رکھتا ہے اور معائب کو چھپاتا ہے"

South Asian Orient: Colonial Epistemological Inquiry and its Modern Connections

As analysts assume that the South Asian regional political environment is difficult to comprehend due to its ethnic divisions and lingual bifurcations as the region hosts more than one and half billion inhabitants divided into India, Pakistan, Bangladesh, Bhutan, Nepal, Maldives, and Sri Lanka. Geographic diversity makes this region unique from all other regions in the world as it is bordered off the Persian Gulf and Arab world through the Indian ocean and opened up from Central Asia to the northern hemisphere. Such a racial, geographic, cultural, lingual and religious diversification had undergone epistemological inquiry during the colonial period in order to devise a central administrative system of regulating Raj’s affairs for the upcoming global world. Therefore, there emerged a unique sense of exploring the unfathomability and multiplicity of the scattering communalities. Through employing Edward W. Said’s critical framework, the present study exposes main theoretical Orientalist formulations by deconstructing major Western theories on South Asian cultures, geography and societies along with its connectivity to the overlapping of global power interests in the present world.

Relationship Between Language and Ethnicity with Special Reference to Baloch Tribes in Pakistan

This Qualitative, Ethnographic inquiry is done to explore the relationship between Language and Ethnicity as a Negotiated Construct with special reference to Baloch Community in Pakistan. Baloch is a distinct ethnic group for the reason that despite speaking four different languages i.e Balochi, Brahvi, Saraiki and Sindhi, the members of the group identify themselves as one ethnic group `Baloch'. In other words Baloch are multilingual and monoethnic. Baloch are 3.3 % of the total population of Pakistan and Balochistan makes 43% of the total area of the country. The group as a whole basically resides in three countries i.e Pakistan, Iran and Afghanistan but 70% of them live in Pakistan and the population concentrates in Balochistan, where a small population is scattered over a large area. The ethnography is done in the backdrop of the current social, political, cultural and ethnic situation in Balochistan. The data is collected in Quetta, the capital city of the province. Observation being the essential instrument for ethnographic research is supplemented by Semi Structured, in-depth Interviews and open and closed ended Questionnaires. Further, Smolicz's Cultural Core Value theory and Tajfel's Social Identity Theory have been taken up as a guiding theoretical and analytical framework for this study. The fundamental investigation lies in answering the set research questions by finding out the `cultural/ethnic core Value' of the group through exploring the role of language in the formation, maintenance and assertion of ethnic identity. Evaluation of ethnicity markers and situations that strengthen the in-group bonding also form an integral part of this study. The findings show that language is an important but not an essential marker of ethnic identity and significance of language can vary within a single group. There are many social factors and cultural elements other than language alone that determine the ethnic identity of the group and its in-group bonding.