Failure Study of Composite Materials by the Yeh-Stratton Criterion

The newly developed Yeh-Stratton (Y-S) Strength Criterion was used to study the failure of composite materials with central holes and normal cracks. To evaluate the interaction parameters for the Y-S failure theory, it is necessary to perform several biaxial loading tests. However, it is indisputable that the inhomogeneous and anisotropic nature of composite materials have made their own contribution to the complication of the biaxial testing problem. To avoid the difficulties of performing many biaxial tests and still consider the effects of the interaction term in the Y-S Criterion, a simple modification of the Y-S Criterion was developed. The preliminary predictions by the modified Y-S Criterion were relatively conservative compared to the testing data. Thus, the modified Y-S Criterion could be used as a design tool. To further understand the composite failure problem, an investigation of the damage zone in front of the crack tip coupled with the Y-S Criterion is imperative

Efficiency and converse reduction-consistency in collective choice

We consider the problem of selecting a subset of a feasible set over which each agent has a strict preference. We propose an invariance property, converse reduction-consistency, which is the converse of reduction-consistency introduced by Yeh (2006), and study its implications. Our results are two characterizations of the Pareto rule: (1) it is the only rule satisfying efficiency and converse reduction-consistency and (2) it is the only rule satisfying one-agent efficiency, converse reduction-consistency, and reduction-consistency.consistency converse consistency efficiency Pareto rule social choice correspondences.

Mildred S. Dresselhaus (1930–2017): A fierce force of harmony

Prof. Mildred S. Dresselhaus, fondly known as “Millie” and “Queen of Carbon Science,” passed away at age 86 on February 20, 2017. She was a pioneer in the research of carbon nanomaterials, a giant in experimental condensed matter physics, a fine musician, a compassionate mentor and role model to young people, a strong advocate for women in science and engineering, and a selfless and impactful citizen of the scientific community

Faiz Ahmed Faiz’s Salvific Ethics and the Uneven World

ABSTRACT Faiz Ahmad Faiz’s Salvific Ethic and the Uneven world   Faiz Ahmed Faiz has a place among the greatest of Urdu poets ever born. His works as well as his life has inspired people from all walks of life. He brought path-breaking changes to the way Urdu poetry was written. Faiz combined socio-political messages, revolutionary ideas and romantic idealism with the sweetness of the Urdu language, thus creating an exhilarating oeuvre. He symbolized all that is humane, dignified, refined, brave, and challenging. His poetry reflects his intellectual resentment and resistance against an unjust and archaic social order, which he rejects on rational grounds as anti-human; yet his poetry has no bitterness.  He wrote against the excesses of ruling elite and challenged colonial and feudal values. Faiz's poetry exhibits a strong sense of commitment to lower-class people. He saw the world around him plagued by the evils and the dark forces of materialism, commercialism and commodity fetishism. He saw nations engaged in wars and the hearts of people full of hatred and cruelty.  He took the challenge to make the world a better place to live.  He used his poetic art as a vehicle to register a protest against the brutal and malicious forces. Fiaz gave voice to the voiceless and suffered with the suffering humanity of his times and his love of humanity is free from the prejudice of color, race or nationality. He sang a song burning with thunder and revolutionary fire but at the same time endowed it with the delicacy of beauty and love.  In my paper I will try to show how Faiz   makes use of  love and beauty to promote social and moral values and does not desist to use the language of love and beauty even while writing about political issues. How he made the agony of love the essence of his existence and imagination and used it to come to terms with the chaos and the anarchy of the modern world. The paper will also talk about Faiz’s redemptive ethics ,his emphasis on the sweet emotions of love and beauty, as an alternative vision to set right the wrongs of the jaded and bumpy world of present times. Â

Proposal for characters for Khowar, Torwali, and Burushaski

This is a proposal to add characters in the Arabic script to the international character encoding standard Unicode needed to represent the Khowar, Torwali, and Burushaski languages. The characters were published in Unicode Standard version 5.1 in March 2008. The languages using these characters are located in northern Pakistan

A study on stryhcnos potatorum and pisum sativum as natural coagulants for meat food processing wastewater

Wastewater generated from meat food processing industry has significant effects on the environment. Many methods have been reported for removing turbidity, total suspended solids (TSS), chemical oxygen demand (COD), oil and grease (O&G) and colour from meat food processing wastewater (MFPW). The most common method among them is flocculation-coagulation process which is widely used. Although inorganic coagulants are prominent in wastewater treatments, its application may cause toxic residual. In this study, the attempt has been made to study the performance of S. Potatorum (nirmali) and P. Sativum (pea) seed as natural coagulants in the flocculation process. A further aim is to determine the optimum conditions for the treatment of MFPW effluents such as coagulant dosage, mixing rate and pH. An adsorption study was also carried out to study the adsorption potential of these coagulants to treat MFPW. A lab-scale treatment tank was developed to evaluate the effectiveness in MFPW treatment. Jar test results showed that optimum dosage, pH and mixing rate for S. Potatorum were pH 8 with dosage of 150 mg/L and 150 rpm mixing rate with the removal of turbidity, TSS, COD, O&G and colour are 91%, 97.6%, 58.4%, 79.9% and 84.3% respectively. Meanwhile, for P. Sativum, the optimum condition were observed at pH 8 with dosage of 150 mg/L and 150 rpm mixing rate with the removal of turbidity, TSS, COD, O&G and colour 87.8%, 97.3%, 65.5%, 77.9% and 76.5% respectively. The adsorption study was found that the analysis fitted well to the Langmuir isotherm for both natural coagulants. Results show that the percentage of turbidity, TSS, COD, O&G removal by chemical coagulants are quite similar than natural coagulants when lab-scale treatment tank was used to treat the MFPW. This indicated that these natural coagulants have a potential to use as alternative in wastewater treatment

Proposal for Arabic Mathematical Alphabetic Symbols

This is a proposal to encode a set of characters used to write Arabic mathematical notation in the international character encoding standard Unicode. This set of characters was published in Unicode Standard version 6.1 in January 2012