Improvement of the Fault Tolerance in IoT Based Positioning Systems by Applying for Redundancy in the Controller Layer

               في السنوات الأخيرة ، ازداد انتشار تطبيقات تحديد المواقع للأنظمة القائمة على إنترنت الأشياء (IoT) بشكل متزايد ، ووجدت استخدامات في تتبع الأنشطة اليومية للأطفال والمسنين وتتبع المركبات. من وجهة نظر واحدة ، قد تحتوي البيانات التي تم الحصول عليها من الأنظمة القائمة على نظام تحديد المواقع العالمي (GPS) على خطأ ، مع مراعاة هذه العوامل ، تعتمد الطريقة المقترحة لهذه الدراسة على تطبيق تحديد المواقع القائم على إنترنت الأشياء واستبدال استخدام إنترنت الأشياء بدلاً من نظام تحديد المواقع العالمي (GPS). ومع ذلك ، لا يمكن أن يكون هذا سببًا لعدم استخدام نظام تحديد المواقع العالمي (GPS) ، ولتعزيز الموثوقية ، يمكننا تطبيق مجموعة متوازية من النظام الحديث والأساليب التقليدية في وقت واحد. على الرغم من أنه يمكن الوصول إلى إشارات نظام تحديد المواقع العالمي (GPS) فقط في الأماكن المفتوحة ، فإن أجهزة نظام تحديد المواقع العالمي (GPS) معرضة للخطأ في المقام الأول عندما يكون جهاز الاستقبال موجودًا في منطقة مدنية ، بسبب الازدحام والتداخل المحتمل. تقدم النتيجة نموذجًا قائمًا على التكرار لتحسين تحمل الأخطاء لأنظمة تحديد المواقع القائمة على إنترنت الأشياء. تُظهر نتائج المحاكاة تحسنًا بنسبة 22.5٪ في تحمل الأخطاء لنظام تحديد المواقع القائم على إنترنت الأشياء بعد تطبيق آلية التحقق المقترحة وتحسين 77.4٪ في هذا التسامح بعد التقدم للحصول على تكرار أكثر تكلفة للوحدة النمطية.  In recent years, the positioning applications of Internet-of-Things (IoT) based systems have grown increasingly popular, and are found to be useful in tracking the daily activities of children, the elderly and vehicle tracking. It can be argued that the data obtained from GPS based systems may contain error, hence taking these factors into account, the proposed method for this study is based on the application of IoT-based positioning and the replacement of using IoT instead of GPS.  This cannot, however, be a reason for not using the GPS, and in order to enhance the reliability, a parallel combination of the modern system and traditional methods simultaneously can be applied. Although GPS signals can only be accessed in open spaces, GPS devices are error-prone primarily when the receiver is located in an urban-canyons area, due to congestion and the possible interference. The outcome presents a redundancy-based model for improving the fault tolerance of IoT-based positioning systems. The simulation results show a 22.5% improvement in the fault tolerance of the IoT-based positioning system after applying the proposed validation mechanism, and a 77.4% improvement in this tolerance after applying for a more expensive module redundancy

EFFECT OF LENGTHANDDEPTHOF THEDRIPTAPEON WETTING FRONT ADVANCE IN THE ROOT ZONE OF SUNFLOWR USING HYDRUS 2D/3D PROGRAM

A field experiment was carried out during  the spring season 2020 at the University of Baghdad to study  the effect of the length and depth of the drip tape on  wetting  advance ofsubsurface drip irrigation system using Hydrus 2D/3D program. The site was planted with sunflower  in a clay loam texture. The drip tape was installed at 0.3m below soil surfacein two lengths; 20m and 40m. The experiment was designed according to the arrangement of split plotsdesign and  with three replications. The treatments were randomly distributed and planted with sunflower crop. The results showed that the moisture contents of the 20 mlength drip tape was higher compared with  the 40 m   drip tape length. Also, the length of the tape was superior in some components of the yield if the length of the drip tape exceeded 20 m in the character of the number of seeds in one disc, and the result was a significant superiority

In Vivo Study of CORAGRAF: A Preliminary Results.

Natural coral is a bone graft substitute, which has been widely used' in maxillofacial, orthopaedic, ORL and periodontal surgery

Microscopic Evaluation Of The Natural Coral (Porties spp.) Post-implantation In Sheep Femur.

Bone defects resulting from congenital defects, tumor or trauma are conventionally repaired using bone graft. Allogenic and xenogenic bone grafts are used as alternatives but several problems are generally associated with them such as virus transfer, considerable care, high cost and regular immuna-defensive reaction

Assessing cow health condition by using the recent Cowdition Smartphone App and its correlation with vital clinical parameters

Highly productive milk cows suffer from increasing loss in body condition at early lactation, and are more prone to metabolic disorders. Recent Cowdition smartphone application has the ability to determine animal health situation and it is called body condition scoring (BCS) system. It can apply adequately for proper farming and management the animal performance. BCS is also helping to assure that all stages of annual cow cycle are in a good condition. Consequently, appropriate dietary changes can be done to prevent any deficiencies and metabolic diseases. Routinely, rectal body temperature and pulsation and respiratory rates are measured as suitable vital indicators for evaluation the health of the animals and recognize the clinical abnormalities. Therefore, this study intends to correlate between the animal body condition and vital physiological parameters measurements to assess cow health. A total of 30 cows at different stages of the reproduction period, raised at different farms location in Al Muthanna Governorate/ Iraq was nominated animal material of the present study. For each cow, Bayer smartphone Application/ BCS Cowdition was used to measure the body condition, and at the same time, body temperature and pulse and respiratory rates were also measured. Scores that collected from the Cowdition application system were compared with physiological vital indicators parameters. The overall means of BCS were found as 3.9 ± 0.068 and range from 2.5 to 5 for minimum and maximum values respectively. Moreover, 63.33 % (19 out of 30) cows showed the standard BCS ranged between 3.25-3.75 and revealed typical vital clinical parameters. Also, 30% (9 out of 30) cows showed fat BCS values ranged between 4- 4.25 accompanied with variation in the vital clinical parameters that increase with high BCS values. Only 6.66% (2 out of 30) cows showed extremist BCS values which were 2.5 and 5 for poor (emaciated) and grossly fat cow respectively. Moreover, these cows showed also variations in the vital clinical parameters. In conclusion, this study represented for the first time in Iraq the adoption of smartphone BCS Cowdition system to evaluate the animal health. Besides, to understand the relationship between BCS and physiological vital clinical parameters values (body temperature, pulse and respiratory rates), to evaluate and assess the cow body health that helps in the improving of animal nutrition and avoid the metabolic diseases that commonly occur in the highly productive cow. The authors recommend another future study that uses BCS Cowdition Smartphone Appication and correlates it with the animal’s metabolic diseases

Transmission Control Protocol Performance Monitoring for Simulated Wired University Computer Network using OPNET

Computer networks need protocols to govern all transmission and presentation processes. The transmission control protocol (TCP) is one of the most important protocols that have the compatibility to work with all types of computer networks, overcoming all architectural and operating system differences. Nowadays, networks depend on the TCP protocol to control data flow between all types of connected computers, whether it is client or server, over any type of media whether it is wired or wireless networks, for all network topologies. A simulation of a university campus network has been conducted to determine TCP protocol features; those features are taken into consideration as one of the most important network parameters. In all digital networks, the data transmission is not a continuous transmission – instead, it is a discreet transmission, presenting itself as packets. These packets transfer and propagate within the network between computers, and network nodes using the TCP protocol depending on the address, which is embedded in its header. TCP has a great influence on the network speed. The network simulator OPNET provides an easy way of campus design, predicting, and estimating the performance of networks in a university campus environment. In this research, wiredconnections reach all computer network users at fixed points to maintain higher Mbps and ensure reliable communications between all the campus network nodes, as well as to increase the overall network performance taking into account the future expansions for the university campus network design

Low power wide area networks: a survey of enabling technologies, applications and interoperability needs

Low-power wide area (LPWA) technologies are strongly recommended as the underlying networks for Internet of Things (IoT) applications. They offer attractive features, including wide-range coverage, long battery life, and low data rates. This paper reviews the current trends in this technology, with an emphasis on the services it provides and the challenges it faces. The industrial paradigms for LPWA implementation are presented. Compared with other work in the field, this paper focuses on the need for integration among different LPWA technologies and recommends the appropriate LPWA solutions for a wide range of IoT application and service use cases. Opportunities created by these technologies in the market are also analyzed. The latest research efforts to investigate and improve the operation of LPWA networks are also compared and classified to enable researchers to quickly get up to speed on the current status of this technology. Finally, challenges facing LPWA are identified and directions for future research are recommended

Cyclooxygenase 2-dependent and independent activation of Akt through casein kinase 2α contributes to human bladder cancer cell survival

<p>Abstract</p> <p>Background</p> <p>Survival rate for patients presenting muscle invasive bladder cancer is very low, and useful therapeutic target has not been identified yet. In the present study, new COX2 downstream signals involved in urothelial carcinoma cell survival were investigated <it>in vitro </it>and <it>in vivo</it>.</p> <p>Methods</p> <p>COX2 gene was silenced by siRNA transfection. Orthotopic implantation animal model and transurethral instillation of siRNA with atelocollagen was constructed to examine the effects of COX2 knockdown <it>in vivo</it>. Cell cycle was examined by flowcytoketry. Surgical specimens derived from patients with urinary bladder cancer (all were initially diagnosed cases) were used for immunohistochemical analysis of the indicated protein expression in urothelial carcinoma cells.</p> <p>Results</p> <p>Treatment with the COX2 inhibitor or knockdown of COX2 reduced expression of casein kinase (CK) 2 α, a phophorylated Akt and urokinase type plasminogen activator (uPA), resulting in p27 induction, cell cycle arrest at G1 phase and cell growth suppression in human urothelial carcinoma cell lines expressing COX2. Silencing of CK2α exhibited the similar effects. Even in UMUC3 cells lacking the COX2 gene, COX2 inhibition also inhibited cell growth through down-regulation of the CK2α-Akt/uPA axis. The mouse orthotropic bladder cancer model demonstrated that the COX2 inhibitor, meloxicam significantly reduced CK2α, phosphorylated Akt and uPA expression, whereas induced p27 by which growth and invasiveness of bladder cancer cells were strongly inhibited. Immunohistochemically, high expression of COX2, CK2α and phosphorylated form of Akt was found in high-grade, invasive carcinomas as well as carcinoma <it>in situ</it>, but not in low-grade and noninvasive phenotypes.</p> <p>Conclusions</p> <p>COX2-dependent and independent activation of CK2α-Akt/uPA signal is mainly involved in urothelial carcinoma cell survival, moreover, not only COX2 but also CK2α could be direct targets of COX2 inhibitors.</p