Low Complexity Selective Adaptive Multicarrier DS-CDMA Receiver

In this paper, selective adaptive (SA) receiver for Multicarrier Direct Sequence Code Division Multiple Access (MC DS-CDMA) system is presented. This receiver has high performance and at the same time reduces the multiple access interference (MAI) of the MC DS-CDMA) system with low computational complexity. The performance of SA receiver is measured in terms of the bit error rate (BER). An upper bound expression of the BER for the SA receiver under Rayleigh fading channel condition is derived and validated by computer simulations. Moreover, the implementation complexities of the SA receiver is compared with the Adaptive Parallel Interference Cancellation (APIC) receiver.

Recursive Detection of M-Ary Signals over Fast Varying Mobile Communication Channel

          Mobile radio is characterized by a fast time varying channel. Conventional detectors which designed optimal for non-fading channel exhibit a limited performance in fast time varying channel. In this paper a recursive detector for M-ary signals over fast time varying mobile communication channel is introduced. The proposed detector continuously estimates the channel directly within the metric calculation of the log-likelihood function in a recursive manner. The estimation of the channel is performed by the covariance form of the recursive least square approach. The performance of the detector is evaluated in terms of the misdetection probability. The effects of timing and phase offsets on the performance of detector are examined by simulation. Simulation results show that the proposed detector can accommodate the fast time varying channel with adequate performance

The compatibility of Yusuf Al Qaradawi\u27s wasateyya school of thought with the second generation of the Muslim Brotherhood

This paper aims to study the influence of the Wasateyya (centrist) school of thought on the Muslim Brotherhood\u27s second generation of leaders. The study shows that the Wasateyya school and its advocates within the Muslim Brotherhood were unsuccessful in bringing about a meaningful change in the direction of moderateness within the movement. The research assesses the influence of the Wasateyya school of thought by evaluating the compatibility of Qaradawi\u27s ideology with that of four members of the middle generation of the Brotherhood; Abd El Moniem Abul Fotouh, Essam el Eryan, Khairat al Shater, and Mohamed Morsi. The thesis is composed of seven large sections; sections one to three introduce the research question, methodology, and limitations. Section four is a literature review, section five addresses the relationship between Qaradawi and the second generation of the MB and defines ideological and political Wasateyya, section six is about the case study of the four leaders, and finally section seven concludes the main findings of the study

Effect of Low Mixing Speed on the Properties of Prolonged Mixed Concrete

The mixing process of concrete consists of dispersing the constituent ingredients (i.e. cement, admixtures, sand, and gravel) in water to homogeneous and solid product. The properties of the final product depend on mixing parameters such as mixing time and mixing speed. Ready Mixed Concrete (RMC) should be mixed for a long time with limited speed until delivered to the working site. This long time depends on long transport distances and traffic conditions. The present study investigated the effects of long mixing time on the properties of concrete without any change in its proportions during the mixing process and the effects of using the chemical admixtures: super plasticizers and retarders on its effectiveness, using a drum batch mixer. It has two directions of rotation: one for mixing concrete and the other for discharging it. This research identified concrete mixtures with local available materials i.e. cement, sand as fine aggregates, dolomite as coarse aggregates, water and chemical admixtures. Mixtures were prepared with the same cement and water content with constant sand to dolomite ratio with different dosages of chemical admixtures. Chemical admixtures were used to keep concrete flow during mixing. Mixtures were prepared with low mixing speed 1rpm for identified long mixing times more than 90 minutes from adding water to other components Slump and compressive tests were used as measurement tools of fresh and hardened concrete Retempering with extra water or chemical admixtures was prevented through mixing, so mixtures were extracted without target slump value. Findings showed that low mixing speeds made mixtures more effective for long times, the exceeding mixing time led to minimize water to cement ratio due to reduction of water content, and there was an inverse relationship between slump flow and compressive strength in case of no re-tempering. Therefore, slump flow of mixtures decreased by time, but on the other hand, compressive strength enhanced i.e. stiffening took place. The present study proved that the properties of the final product depends on mixing parameters such as mixing time and mixing speed, and that Ready Mixed Concrete (RMC) would be more effective if mixed for a long time with limited speed until transported to the work site. In addition, chemical admixtures with prolonged mixed concrete should be used to improve workability rather than compressive strength

デンドリマー様ポリマーDNAの合成とテロメアDNA化学発光検出およびsiRNAの細胞内輸送への応用に関する研究

長崎大学学位論文 [学位記番号]博（医歯薬）甲第718号 [学位授与年月日]平成26年9月19

Ipsilateral Retrograde Balloon Angioplasty of Flush Lesions of Superficial Femoral Artery Occlusion

Background: For almost 50 years, endovascular treatment has been used to treat chronic limb ischemia. The retrograde contralateral "crossover," antegrade ipsilateral, or retrograde popliteal techniques may be used to treat superficial femoral artery occlusions. There were early drawbacks to the retrograde technique, thus it was used as an emergency alternative. Objective: This study aimed to investigate efficacy and safety of ipsilateral retrograde balloon angioplasty for flush lesions of superficial arterial blockage. Patients and methods: This prospective cohort study was carried out at Sayed Galal Hospital and Al-Hussein Hospital through the period from August 2018 to August 2021. This study included 50 individuals with peripheral arterial disease (PAD). Interventional study was conducted on flush lesions of superficial femoral artery occlusion. Results: A significant difference between patients who achieved patency and who did not achieve patency )regarding BMI, dyslipidemia, cardiac diseases and postoperative ABI). Conclusion: Retrograde balloon angioplasty of flush lesions is a reliable procedure for superficial femoral artery occlusion handling with relatively low rate of complications