Toughening Of Epoxy Resin With Modified Liquid Natural Rubbers And Acrylonitrile-Butadiene Liquid Rubbers [TP1180.E6 A136 2005 f rb].

The preparation of liquid natural rubber (LNR) by depolymerizing deprotenized natural rubber latex was carried out. Getah asli cecair (LNR) disediakan dengan cara penyahpempolimeran penyahprotinan lateks getah asli ternyahprotin

The Concept of \u27Al-Istighfal\u27 Testimony between Law and Shari’a

This research sheds light on one of the main parts of testimony as a means of achieving evidence, titled Al-Istighfal Testimony in Sharea and law . This research is divided into three chapters and a conclusion. Chapter one deals with a definition of the testimony linguistically and academically. It also gives some examples of this kind of testimony. Chapter Two depicts the jurisprudents’ opinions, their evidences and justification, side by side with discussing these evidences. It also presents the proper opinion in this issue. Chapter Three deals with the law point of view of \u27Istighfal Testimony\u27, demonstrating its liability to accept that kind of testimony in it, questioning if there is any legal text that admits its acceptance. The research concludes with stating the most important results and recommendation of the research

Intérêt du clou rétrograde dans les fractures du fémur distal: à propos de 07 cas

Ce travail rapporte une série de sept cas de fractures de l’extrémité inférieure du fémur traitées par enclouage centromédullaire rétrograde au service de traumatologie orthopédie au centre hospitalier Ibn Sina durant la période du 30/05/2010 au 30/04/2015. L’âge moyen de nos patients est de 54 ans avec une légère prédominance Masculine (57,1%). Les accidents de la voie publique ont représenté la principale étiologie (71,4%) et le côté droit était le plus touché (57,1%). Sur le plan opératoire, le délai moyen de l'intervention était de 2 jours. La rachi anesthésie a été réalisé dans cinq cas. La durée moyenne d’hospitalisation était de 5 jours. L’ensemble de nos patients ont consolidé dans un délai moyen de 4 mois, avec un cas de retard de consolidation à 6 mois. Nous avons obtenu de bons résultats fonctionnels avec une flexion moyenne du genou à 120°, avec un seul cas de flexion limité à 90°. Dans notre série, on avait constaté un seul cas de retard de consolidation et un seul cas de pseudarthrose. Nous n’avons noté aucun décès ni sepsis superficiel ou profond, ni complication thromboembolique ou embolie graisseuse, nos résultats étaient en général satisfaisants, ce qui nous donne le droit de dire que l’enclouage rétrograde du fémur reste une technique d’ostéosynthèse qui a toute sa place dans le traitement chirurgical des fractures distales du fémur

Network Coding For Star and Mesh Networks

This thesis introduces new network coding techniques to improve the file sharing and video streaming performance of wireless star and mesh networks. In this thesis we propose a new XOR based scheduling algorithm for network coding in cooperative local repair. The proposed algorithm commences in three phases. In the first phase, nodes exchange packets availability vectors. These vectors are functions of the probability of correct packet reception over the channel. This is followed by a short period of distributed scheduling where the nodes execute the processing algorithm which tries to minimize the total transmission time. In the third phase, nodes transmit the encoded packets as per the decision of the scheduling algorithm. Simulation results show improvement in system throughput and processing delay for the proposed algorithm. We also study the trade-offs between file sizes, processing delays, number of users and packet availability. In the sequel we display the favorable effects of file segmentation on the performance of the proposed scheduling algorithm. Furthermore, the upper bound on the performance and the analysis of the proposed scheduling algorithm are derived. Also, in this thesis, the effects of random network coding on code division multiple access/time division duplex (CDMA/TDD) platforms for wireless mesh networks are studied and evaluated. A multi-hop mesh network with single source and multiple receiving nodes is assumed. For reliable data transfer, a Selective Repeat ARQ protocol is used. Two scenarios are evaluated for their efficiency. In scenario 1, but not in scenario 2, random network coding is applied to CDMA/TDD wireless mesh networks. The delay and delay jitter for both scenarios are computed. The study also focuses on the effects of uncontrolled parameters such as the minimum number of neighbors and the network connectivity, and of controlled parameters such as Galois Field (GF) size, packet size, number of Walsh functions employed at each node and the Processing Gain. The analysis and simulation results show that applying random network coding to CDMA/TDD systems in wireless mesh networks could provide a noticeable improvement in overall efficiency. We also propose a cross layer approach for the Random Network coded-Code Division Multiple Access/Time Division Duplex (RNC-CDMA/TDD) wireless mesh networks. The proposed algorithm selects the number of assigned Walsh functions depending on the network topology. Two strategies of Walsh function assignments are proposed. In the first, nodes determine the number of their assigned Walsh functions depending on the neighbor with the maximum number of neighbors, which we call the worst case assignment. In the second, nodes determine the number of their assigned Walsh functions depending on the need for each transmission. Simulation results show the possible achievable improvement in the system performance, delay and delay jitter due to cross layer design

Date palm waste pyrolysis into biochar for carbon dioxide adsorption

Mitigation of CO2 is a very popular research currently, it is ultimately beneficial to find new ways that are sustainable, low cost and gas emission friendly. Therefore, with biochar’s characteristics and properties it has great potential to be used as a CO2 capture and storage media. The objectives of reducing palm waste by using the low-cost, sustainable method for reducing and storing CO2, characterize the DPL biochar through FTIR, XRD, SEM, EDX, and then evaluate the efficiency of the date palm leaf waste biochar in adsorbing CO2 through the Gas–Solid analyzer technology. Date palm leaf was set in pyrolysis process at 500°C peak at a 10°C per min rate for 5 h. The peaks of maximum intensity are approximately 1000 to 1500 cm −1; two peaks are approximately 1110 and 1600 cm-1 as the transition rises when the peaks are wider and shorter. Carbonyls, Alkenes, Alkynes, and others were found in feature groups, but the maximum area with O-H and C-H bonds and vibration picks is reduced and nearly non-existent. Biochar showed porous and heterogeneous structures with various magnifications, which give a greater amount of surface for adsorption. XRD analysis indicated that cellulose could progressively be decreased. The weighing of each component was 83.56% for Carbon, 12.43% for Oxygen, 1.12% for Potassium, 1.64% for Calcium, 0,83% for Phosphorus and 0.4% for Magnesium. The presence of these metals gives a strong CO2 attraction. The area value was found to have been approximately 3.117, reflecting the total CO2 obtained by the date palm leaf biochar. This shows that 300 gr of DPL biochar have been consumed by just one third of CO2. Date palm leaf of biochar’s shows a carbon dioxide adsorption efficiency of 20% and measured CO2 adsorption per g of biochar DPL of 0.017 g at 500 °C pyrolysis temperature and conditions set