حق المرأة في ادارة أملاكھا التجارية في الإسلام

Islam has given the dignity to women more than as it is given by any other religious or social system. This dignity covers almost every fiedld of life. Business is also one of these fields, where Islam has provided a variety of oppurtunities. Basic sources of Islam, that are, Quran and Hadith elaborated all these rights of women. The right of being a business-woman as provided by Islam is based on the one of the basic principals of Islam, that is, equality of oppurtunities without taking into consideration the gender of a member of the society. A woman can exercise all these rights as a man can. Women are the other half of the society and without which life cannot be imiginated on its peak. It is imperitive to mention here that women are playing a pivotal role in the development of any country/society and it is impossible to achive advancement without the participation of women. In this article, different kinds of rights that are given to women in an Islamic system such as policital, financial, health, educational, social and family rights, are being dicussed in detail. An exculsive foxus remained on business related rights of a woman.

Bandpass Sampling Methodology for Uniformly Spaced Multiband Energy-Sparse Spectrum

In this dissertation, a novel direct radio frequency (RF) sampling method is proposed in order to find out the minimum sampling frequency for an evenly spaced spectrum comprising multiband RF signals. The proposed methodology describes a set of rules to achieve the lowest possible sampling frequency rates without any compromise of spectrum folding or overlap of aliases in baseband after down conversion. It is shown that the minimum sampling rate has a unique relation with the layout of the spectrum of interest (SOI). For instance, if there are N number of information bands of equal bandwidth B in the SOI, then it is possible to down-convert the complete SOI using the sampling rate, 2NB, which is twice of the total information bandwidth only if all bands are evenly spaced in the SOI. Another factor introduced to the achieve the minimum sampling rate is the sparseness-nature in the SOI, which is the ratio of null bandwidth to information bandwidth. The proposed methodology is general in nature and is flexible to the number of input signals or bands as well as to their positions in the desired spectrum. In the proposed research work, simulations are carried out that verify that by using the recommended minimum sampling rates, the desired signal is extractable without any additional computational complexity due to spectrum folding or aliasing-overlap. Our proposed methodology has a vast scope in the design of general-purpose receivers, global navigational satellite system (GNSS) receiver and cognitive radios (CR) because of the use of a low speed ADC. Moreover, the same can be efficiently used to monitor a wide band spectrum in military communications especially for electronic warfare receivers, where reduction of the complexity, size and cost has significant importance. As a model application of our proposed work, we present a composite design for the multiband-multistandard GNSS receiver. The design efficacy is based on the proposed bandpass sampling methodology that transforms the sparse-spectrum electromagnetic environment into a quasi-uniformly spaced spectrum of compact bandwidth, which is more appropriate and useful for simultaneous digitization and down-conversion of analogue signals. In this method, only a part of SOI is transformed to an intermediate frequency. In this way, the desired frequency bands of information that are widely spread, are grouped to form a contiguous-spectrum which is quasi-uniformly spaced. There on, a sub- sampling is carried out for simultaneous digitization and translation of input signals to the first-Nyquist zone. The proposed composite architecture is also helpful to circumvent the higher-order intermodulation components. The proposed design is validated for conventional Global Positioning System L1 and L2 bands and also for new L5 band used in GNSS (GLONASS, Galileo and Beidou) receivers. The presented results show considerable reduction in the sampling rates, and improvement in signal-to-noise and distortion ratio, which can be easily managed by a low sampling analogue to digital conversion.