Abstract:The advancement in the world of global satellite systems has enhanced the accuracy and reliability between various constellations. However, these enhancements have made numerous challenges for the receivers’ designer. For instance, comparing the acquisition and tracking of the Galileo signals turn into relatively complex processes after the utilization of Alternate-Binary Offset Carrier (AltBOC) modulation scheme. This paper presents an efficient and unique method for comparing baseband signal processing of the complex receiver structure of the Galileo E5 AltBOC signal. More specifically, the data demodulation has attained after comparing the noisy satellite data sets with the clean data sets. Moreover, the paper presents the implementation of signal acquisition, code tracking, multipath noise characteristics, and carrier tracking for various datasets of satellite after the eradication of noise. The results obtained in the paper are promising and provide the through treatment to the problem.
Abstract:Gallstone induced small bowel obstruction is a rare condition but devastating disease, which usually occurred in obesity or NSAID-chronic-using patients. The poor controlled diabetes mellitus is a significant risk factor to hind the typical sign and symptoms of gallstone ileus. These patients may have high risk of sepsis and death. Here, we present a case of a 89-year-old male who presented with diabetes mellitus type 2 under irregular controlled came to the emergency room with diffuse abdominal dull pain. The pain initially localized epigastric area and progressed to diffuse abdomen without radiating to the back. After surveying, the abdominal plain film revealed ileus pattern and abdominal computed tomography showed gallstone ileus. This paper also describes the clinical features of gallstone ileus and highlight the atypical symptoms in diabetes mellitus patient for physicians to timely intervention for sepsis.
Abstract:Backgraound: End stage renal disease (ESRD) is considered to be an independent risk factor for early and late survival after coronary artery bypass grafting. Perioperative death ranges from 5% to 20% in ESRD patients, which is roughly 3-fold greater than that in non-ESRD patients. Objectives: Retrospectively analyzed the peroperative morbidity and mortality rates, and short-term results of dialysis patients undergoing isolated off-pump coronary artery by-pass surgery (OPCAB) at our institution in the past 8 years and compared clinical outcome with that of dialysis patients undergoing isolated conventional on-pump coronary artery by-pass surgery (ONCAB) during the same time period. Design:Fifty-five patients requiring dialysis who underwent coronary bypass graft surgery (CABG) at our institution from 2000-2017 were enrolled in this study. Patients (Materials) and Methods: ONCAB was performed for 74 patients and OPCAB for 36. Comparisons were made between patients undergoing on-pump and off-pump bypass surgery with respect to demographics, risk factors, and outcomes. Main outcome measures: This study compares outcomes of coronary artery bypass grafting in dialysis patients with on-pump and off-pump techniques. Results: Groups were compared in terms of peroperative characteristics, transfusion requirement, blood loss and duration of intensive care unit stay was statistically significantly higher on ONCAB group from OPCAB group. (p<0.05 ) Postoperative CK and CKMB values of ONCAB group was significantly higher from OPCAB group (p=0.003). Postoperative CK of ONCAB group was observed to have a statistically significant increase from preoperative values (p<0.05). Conclusion; When compared to conventional ONCAB group, OPCAB patients had less drainage, shorter intensive care unit stay, lower CK and CKMB elevation, and less requirement of IABP in patients reguiring dialysis.
Abstract:In Morocco, agriculture is the main source of life for most people. Such as, to irrigate agriculture, they use engines that consume fossil energy to pump well water . While, this means of irrigation is not profitable because of the high cost of the fuels used . More, it has serious consequences on our environment. For this reason, we thought about applying alternative energy, which responds well to the problems mentioned. This is photovoltaic energy (PV) through the installation of PV pumping stations for agricultural irrigation and domestic use [3-4]. The choice of this type of energy was based on several factors: Sunny region, moderate temperature, this energy is profitable. Our contribution will be at the level of scientific research through the study of the operation of PV installations (efficiency, loss of power ...) and the application of prototypes made in the laboratory to optimize the operation of these PV installations.
Abstract:Blind techniques play a crucial role in digital signal processing, especialy in identification and equalization, in termes of observed informations with acceptable precision in noisy environment, mainly this field of sciences has already been one of the most powerful technologies, it had a revolutionary changes in the last century. In this work, we propose and implement a new algorithm based on blind techniques for channel identification and signal equalization. Our algorithm is a mixture between two established algorithms obtained previousely, Some numerical experiments are presented to clarify performance of our approach under different channels, it was tested for different cases and for different type of channels: BRAN A et BARAN E. Our results, compared to priviously published works, gives better channel estimation and signal equalization
Abstract:The Baptism (El-Maghtas) site located north to the Dead Sea at the eastern bank of the Jordan River. There are many excavations in the surrounding area revealed different archaeological remains which indicates the location “John the Baptist”. He lived and preached in the early 1st Century A.D. who is famous for John the Baptist baptized Jesus. The archaeological excavations reveals walls, antiqueties, ancient water system includes such conduits, pools, and ancient pottery pipe. The Ground Penetrating Radar (GPR) survey was carried out at selective locations along parallel profiles at the study using a Subsurface Interface Radar System (SIRvoyer-20) with either 400 MHz or 900 MHz mono-static shielded antennas manufactured by Geophysical Survey Systems Inc to delineate possible shallow archaeological material at shallow depth. The GPR radar-gram profiles revealed different subsurface anomalies across all sites. At John the Baptist Church site buried wall were detected along profiles, the GPR survey recognized shallow wall and shallow buried channel at the pools site. At Elijah\'s Hill site the GPR data confirmed the extension of an ancient pottery pipe. Basically the clear diffraction hyperbola anomaly related to the ancient pottery pipe could be discriminated from the 2D profiles. The GPR data was displaced using 3D imaging to define the horizontal and the vertical extent of the pipe.
Abstract:Nutritional Balance in feed is very important in order to improve the efficiency of feed. The use of oil in omnivore fish can serve as a spare protein energy provider in addition to carbohydrates. Efforts to replace some of the protein functions as an energy source, by feed oil supplements from coconut flesh combined with candlenuts, with or without added of trace element Se, thus improving the optimum use of protein in freshwater fish. This study aims to determine the physiological and biological features of feed formula (low protein 28%) with fat and selenium supplementation and to get the ratio and type of fat (saturated and unsaturated) compared with high protein (32%), which can increase feed efficiency of Nile tilapia (Oreochromis niloticus) fingerling phase. The preparation stage found that coconut fat supplements were dominated by saturated fatty acid as lauric (42.67%), whereas candlenut fats contained unsaturated fatty acids, linoleic (34.4%) and oleic (48.99%) so the use of candlenut oil (0%, 2% and 4%) can increase the ratio of unsaturated fatty acids in feed. Treatments consist 6x3 with Completely Randomized Design by ratio of unsaturated fat and saturated fat supplement Se. R1 low protein feed without supplements; R2 and R3 low protein feed containing ratio of unsaturated-saturated fat 1:1 (mixture of oil) without and with addition of Se, and then R4 1:2 (coconut oil); 2:1 (candlenut oil) and R6 high protein without of fat supplements 2:3, produces normal physiological (hematologic and digestive) images for tilapia health. The main research (feeding trial) showed that low protein feed containing ratio of unsaturated-saturated fat 1:1 (coconut and candlenut mixed-oil were 2% of each) with the addition of selenium 0.15 ppm, was the best feed efficiency in tilapia ranged from 50.14-57.93% and protein efficiency ratio 1.72 - 2.06.
Abstract:Background. Adhesion is a key issue for researchers of various fields, including attempts to develop new diagnostic methods. Furthermore, over the past decades a paradigm shift has occurred in the field of microbiology with the understanding that microorganisms present in biological systems exist in biofilms, rather than in a free-living state. This has changed the way we study microorganisms in vitro and resulted in the development of new experimental models that replicate biofilm environments. The current study explored the possibility of attaching bacteria to micro-silica particles possessing a specific electrical charge at their surface. The aim of the study was to detect possible differences in the speed of rates of turbidity between different species of suspensions of microorganisms with and without SiO2 beads. This knowledge could assist in the development of a new diagnostic tool and be useful to better understand biofilm formation process. Materials and methods. Reference cultures of Staphylococcus epidermidis, Neisseria gonorrhoeae, Bacillus subtilis subsp. Spizizenii Nakamura et. al., Escherichia coli 25922, Pseudomonas aeruginosa, Enterococcus faecalis, Methicilin resistant Staphylococcus aureus (MRSA), Methicilin sensitive Staphylococcus aureus (MSSA). SiO2 glass beads. Densitometer (suspension turbidity detector). Data analysis was conducted by paired Student’s t-test. Results. Bacterial suspensions of S. epidermidis, N. gonorrhoeae, B. subtilis, E. coli, P. aeruginosa, E. faecalis, MRSA, MSSA with SiO2 beads showed statistically significant quicker decreasing of turbidity rates in comparison with corresponding suspensions without SiO2 beads. In opposite, bacterial suspension of S. epidermidis with SiO2 beads showed slower decreasing of turbidity rates in comparison with corresponding suspension without SiO2 beads. Conclusions. High fast potential of silica particles to adhere the most of microorganisms except S. epidermidis can be used as a background to develop a new diagnostic tool to distinguish S. epidermidis from other bacteria in vitro and should be considered as an obstacle to use silica for implants due to possible active biofilm formation in vivo.
Abstract:This paper mainly introduces the “power transmission line fault distance measuring system” of Taiwan Power Company. It utilizes and applies the auxiliary function of the established digital relays to power transmission line fault locating and detection. Since 2005, the system has counted the power transmission fault events and analyzed the errors between the calculated fault location and the actual fault location. Results show that the system has high accuracy, efficiency and engineering practicability to maintain the power supply reliability of the power grid and not increase the work load of the operation personnel. In the following contents, this paper will explain how to apply the auxiliary function of the established digital relays to construct the system, as well as how to calculate the fault location and the tolerances as fast as possible. The final part will further illustrate the case statistics.
Abstract:Ad-hoc network is constructed by a group of mobile nodes upon a wireless network interface. As routing is the major concern in today’s scenario, different routing protocols are proposed e.g., DSR, AODV, TORA, .etc. These protocols works only with the assumption that when source and sink nodes are present in same network. In this paper a new approach is proposed in which the source and sink node are present in two separate different networks. This approach has been evaluated on three different parameters and compare with the existing DSR and these parameters are throughput, packet drop-count, and packet receive.