Fuel cell is an emerging, cleanest, environmental friendly and pollution free technology, which converts chemical energy of fuel into electricity, heat and power without combustion. Fuel cells are categorized according to their electrolytic materials and working temperature. Solid oxide fuel cell (SOFC) is the most dominant and prominent among the fuel cell family. In other words, fuel cell is one of the most competitive candidates that could provide possibly accomplishments. Conventionally, Ni-YSZ cermet anode is used in SOFC, which works in the temperature range of 800-1000oC. Although this anode possesses a high electrochemical activity, high performance as well as electronic conductivity yet it requires a high working temperature to achieve the optimal results. Its high working temperature is the present draw back which becomes a major barrier to its commercialization. If this cell has to be commercialized then there is need to find suitable electrode materials that can operate successfully at low operating temperature. Keeping this in mind, many new electrode materials have been introduced in the present work, which have been classified into two groups; one is containing Ni partially while the other is completely Ni free. New electrode materials were prepared by introducing nano technique using either dry or wet chemical method with an added advantage of low manufacturing temperature. In order to fabricate a complete fuel cell, the compatible electrolyte materials were also prepared by co-precipitation method. These materials exhibited an excellent performance at comparatively low temperature (400-600 oC). For SOFC electrode and electrolyte purpose, CuNiZnGdCe (CNZGC), Al0.1NixZn0.9-x (ANZ), Cu0.2Mn0.2Zn0.6 (CMZ), Ba0.05Cu0.25FexZn0.7-x (BCFZ) Ba0.15Fe0.10Ti0.15Zn0.60 (BFTZ), Ba0.4Sr0.6Co 0.3Mn0.7 (BSCM), La0.1Sr0.9Co0.2Zn0.8 (LSCZ), Na2CO3-K2CO3- Ca0.2Ce0.8 (NK-CDC) and Gd0.1Ce0.9-Y2O3 (Y-GDC) materials were successfully synthesized by solid state reaction method or wet chemical and co-precipitation method. These electrodes and electrolyte materials were characterized by XRD, SEM, TEM, electrochemical and electrical techniques. It has been found that the BCFZ-5 having a composition of Ba0.05Cu0.25Fe0.10Zn0.60 shows an electrical conductivity equal to 25.84 at hydrogen atmosphere. It also exhibited the maximum power density of 741.87mW/cm2 and 933.41mW/cm2 for symmetrical and asymmetrical fuel cell testing schemes. On the basis of these results, BCFZ-5 material is considered a promising electrode/anode candidate for low temperature solid oxide fuel cell. Different approaches have been implemented to reduce the present cost of electrode and electrolyte materials for solid oxide fuel cell. For example; I. II. Use of cheap raw material Lowering of sintering temperature III. Reduction of sintering time IV. Lowering of operating/working temperature It has been noted that the substitution of zinc compound Zn(NO3)2.6H2O in place of nickel oxide (NiO) has reduced the cost by a factor of ≈25 in addition to the lowering of manufacturing and operating temperature, which also reduces the cost indirectly by saving energy and time. Moreover, the cost has been further reduced by a factor of 35 and 18 when samarium nitrate Sm(NO3)3.6H2O and gadolinium nitrate Gd(NO3)3.6H2O are respectively replaced by calcium nitrate Ca(NO3)2.4H2O. The lowering of working temperature from 1000 to 550oC is a major achievement that would not only reduce the running cost yet it may help in commercialization of solid oxide fuel cell. In a nut shell the electrodes and electrolytes proposed in the present work have successfully lowered the manufacturing as well as working temperature and hence the operational cost along with a significant reduction in the manufacturing cost of solid oxide fuel cell (SOFC). Key words: Solid Oxide Fuel Cell (SOFC), Zn Based Electrodes, Nano-composites Electrodes, Energy Conversion Device, Ceria Carbonated Fuel Cell, Advanced Fuel Cell, Efficient Device, BCFZ anode, NKCDC electrolyte, Novel Cathode
منشی محمد اویس صاحب وارثی ناظرین معارف کو نہایت رنج و انددہ کے ساتھ یہ اطلاع دی جاتی ہے کہ ہمارے ایک دیرینہ رفیق کار اور دارا لمصنفین کے پرانے اور اہم کارکن منشی محمد اویس صاحب وارثی بتیس سال کی رفاقت کے بعد ہم سے جدا ہوگئے، مرحوم نے ۱۸؍ ذی الحجہ کو ایک مختصر علالت کے بعد انتقال کیا، وہ دارالمصنفین کے قیام کے آغاز سے اس سے وابستہ تھے، اور آخر دم تک بڑی جانفشانی، اخلاص، خیرخواہی اور دیانتداری کے ساتھ اپنے فرائض انجام دیتے رہے، اور ہمیشہ اس کو اپنا ذاتی کام سمجھ کر انجام دیا، مکتبہ دارالمصنفین کی ترقی میں ان کی محنت کو بڑا دخل تھا، اس کے تجارتی کاروبار میں ان کی ذات بڑا سہارا تھی، اور دفتری کاموں کا دارومدار انہی پر تھا، اب ان کا جانشین ملنا مشکل ہے، ان خوبیوں کے ساتھ مرحوم شرافت اور وضعداری کا نمونہ تھے، نہایت خوش خلق، شریف الطبع، حق گو، حق پرست، مرنجاں مرنج، اعزہ کے مددگار، احباب کے ہمدرد و غم گسار، ان کا برتاؤ ایسا تھا، کہ ہر شخص ان کو اپنا سمجھتا تھا، سب کے دل میں ان کی یکساں عزت و وقعت تھی، بتیس سالہ زندگی میں کسی کو ان سے کوئی شکایت پیدا نہیں ہوئی، وہ دنیاوی معیار سے کوئی اونچی شخصیت کے مالک نہ تھے، نہ صاحب جاہ و ثروت تھے، نہ کوئی علمی حیثیت رکھتے تھے، لیکن اگر بڑائی نام ہے اخلاق و شرافت اور سیرت و کردار کی بلندی کا تو مرحوم بہت بڑے آدمی تھے، اللھم اغفرہ مغفرۃ واسعۃ ۔ناظرین معارف سے بھی مرحوم کے لیے دعائے مغفرت کی درخواست ہے۔ (شاہ معین الدین ندوی، دسمبر ۱۹۴۶ء)
With the start of the codification of Muslim Personal Law in the Muslim countries, the question of exclusion and deprivation of orphan grand-children of the deceased from heir ship has gained importance. Bringing of section 4 on statute book was the result of the recommendations of the Commission on Marriage and Family Laws 1956. It was based on so-called ijtihād which caused confusion in the Islamic law of inheritance. Hence by declaring the section 4 repugnant to the injunctions of Islam, the Federal Shariʻat Court observed that the concept of “compulsory will” is an appropriate alternate to this problem. The court explains that making a will in favor of orphan grandchildren out of an estate of grandparents to the extent of one third would be very plausible solution to meet the socio- economic problem. The article aims to elaborate the concept of making of a will specially wasiyat wajiba in favor of orphan grandchildren. Various juristic opinions, rulings and legislation of Muslim countries have been analyzed in this regard. Majority of jurists are of the opinion that the making of will in the said case is only recommended and not mandatory. However according to some jurists it is mandatory. In this condition the legislative body may take steps to amend the law so as to bring the said provision in conformity with the injunctions of Islam.
Education is an influential instrument for financial and political change in the world. So it is important to provide access and enhance quality of education at various phases of learning. Secondary level of Education is the most crucial stage of learning. It is the turning point for the students. The substantial number of taught labor in Pakistan is accessible at this stage. Procurement of access and perfection of quality of this stage is key for improvement in higher stage of learning, which is the soul result of quality of teachers and the support given to them. The main purpose of the study was to examine the impact of private secondary schools on quality and access of education in Khyber Pakhtunkhwa (Pakistan). The major objectives of the study were (1) To identify the role of private education sector. (2) To find out impact of private sector education in terms of Access and Quality. (3) To suggest measures for the improvement of private education sector. All private Secondary Schools, the Principals of these schools, the teachers and students of these institutions were included as Population of the study. Khyber Pakhtunkhwa is for the most part partitioned in three distinctive strata which are North, Central, and South. Ten districts of Khyber Pakhtunkhwa were selected for the dissertation. The names of the districts were Abbotabad, Peshawar, kohat, Karak, Dera Ismail khan, Lakki Marwat, Mardan, Swat,Charsaddah and Mansehra. The sample was selected randomly. A sample of 120 private secondary schools and the principals of these schools, 600 teachers (five teachers from each sample school) and 1200 students (ten students from each sample school) was randomly selected. The proportion of male and female students and teachers was fifty each. Three questionnaires (for principals, teachers and students) were developed and disseminated for data collection. Collected data were tabularized, examined and interpreted. Then statistical tools such as mean, standard deviation, standard error of mean and estimated population mean were applied. Based on the conclusions some suggestions were given to provide students with the support systems to help them succeed at these institutions. Continuous planning, support and development are needed to develop the worth of education. Use of audio-visual aids is recommended to make the process of learning effective. Proper physical facilities may be offered by all private educational institutions for access and quality of education.