A priority strategy on RISC for real-time multitasking software applications

1989 ◽  
Vol 17 (4) ◽  
pp. 62-68
Author(s):  
A. Elkateeb ◽  
T. Le-Ngoc
Author(s):  
С.В. Шевелев ◽  
А.Б. Семенов

Рассмотрены принципы обеспечения заданного уровня качества обслуживания QoS в беспроводных сетях, позволяющие достигнуть устойчивого функционирования программных приложений реального времени за счет тонкой настройки приоритезации генерируемого ими трафика. Основное внимание уделяется механизму управления доступом на основе конкуренции и контролируемого доступа, а также их расширениям. Затронуты вопросы инкапсуляции базовых механизмов управления в решения более высоких уровней EDCA и TXOP. Приведены расчетные значения соответствующих параметров. The principles of ensuring a given level of quality of QoS service in wireless networks are considered, which allow achieving the stable functioning of real-time software applications by fine-tuning the prioritization of the traffic generated by them. The main focus is on the competition-based access control mechanism and controlled access, as well as their extensions. The issues of encapsulation of basic control mechanisms in solutions of higher levels of EDCA and TXOP are touched upon. The calculated values of the corresponding parameters are given.


Author(s):  
Guillermo Cueva-Fernandez ◽  
Jordán Pascual Espada ◽  
Vicente García-Díaz

Nowadays, many software applications are used to offer services or functionalities to drivers. Even though, there is a lack of applications that offer drivers the possibility to express their need to generate a specific application in real time. In this research, the authors present an innovative platform that allows users to generate multimedia web applications that use real time vehicle sensor information. The creation of applications is specified through a voice interface to allow users to generate applications while driving. Information used in the applications is collected combining mobile device sensors (accelerometer, GPS, light sensor, barometer, etc.) and vehicle real time On-board Diagnosis port information (speed, engine revolutions per minute, fuel consumption, coolant temperature, throttle, battery voltage, etc.). The domain of generated applications includes driving safety, road state, parameter notifications, social applications, etc. The generated applications can display visual information systems such as maps, audio, video and measurement gauges. For the analysis of this paper, the authors present three prototypes to demonstrate the platform capabilities.


2020 ◽  
Vol 305 ◽  
pp. 00004
Author(s):  
Oliviu Mihnea Gamulescu ◽  
Sebastian Daniel Rosca ◽  
Fabian Panaite ◽  
Alin Costandoiu ◽  
Simona Riurean

Nowadays, finding a way to quickly respond to industrial accidents due to human errors or unforeseen situation is high, for example in the petrochemical industry where are handled with toxic and flammable substances, is a priority for the safe coordination of rescue teams based on-real time knowledge of the situation on the ground. Thus, the rapid identification of potential victims, the prevision of post-deflagration work space and the prevention of the new emergencies to limit damage should become a priority. In this paper we propose a quickly solution for rescue intervention based on use of the drone equipped with camera and sensors network capable of transmitting data in real time over the post-explosive environmental conditions to command center for the rapid identification of victims both in open and closed spaces. The paper presents the methods of using drones to explore and identify accident sites. There are modelled and simulated the control system and the image identification unit.


2004 ◽  
Vol 1 (1) ◽  
pp. 91-102 ◽  
Author(s):  
James E. Hunton ◽  
Arnold M. Wright ◽  
Sally Wright

The movement to more continuous reporting (CR) and continuous assurance (CA) of financial statements appears to be a matter of when and how such changes will take place, rather than if they will occur. Research evidence suggests that computing infrastructures and software applications have advanced to the point where it is now technically and economically feasible to begin preparing and disseminating financial statements on at least a monthly basis (Hunton, Wright, and Wright 2003), and someday it is likely that full or partial financial and nonfinancial disclosures will be processed and presented in real time. Additionally, information consumers are demanding, and the Securities and Exchange Commission (SEC), American Institute of Certified Public Accountants (AICPA), and International Accounting Standards Board (IASB) are contemplating reporting and assurance changes of this nature. Thus, whether “continuous” is defined in terms of monthly, daily, hourly, or real-time reporting, rapidly converging market factors indicate that in the foreseeable future firms will publish and auditors will assure financial information on a more frequent basis than the current quarterly interval. The major challenge going forward for behavioral researchers in accounting is to investigate how changes of this nature might affect the decision-making processes and consequential outcomes of various constituent groups, such as investors, preparers, and assurers. The combinations of affected parties, contexts, and tasks that could be examined are too numerous to explore in a single article. Accordingly, to keep the following discussion focused and manageable, the scope of this paper is aimed at understanding the potential impact of CR and CA on individual investors. Perhaps by identifying a number of the psychological issues and reviewing some of the studies in this area, accounting behavioral researchers will be motivated to investigate many of the issues and opportunities related to this new and exciting line of research.


2014 ◽  
Vol 0 (11) ◽  
pp. 159
Author(s):  
Victor Nikiforov ◽  
Viacheslav Shkirtil

Author(s):  
Douglas Burton ◽  
Tim Kitchen

Software allowing real-time online video connectivity is rapidly evolving. The ability to connect students, staff, and guest speakers instantaneously carries great benefits for the online distance education classroom. This evaluation report compares four software applications at opposite ends of the cost spectrum: DimDim, Elluminate VCS, TokBox, and Vyew. Their benefits and shortcomings are contrasted, and efficient educational scenarios for them are suggested.


Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4242 ◽  
Author(s):  
Yulong Wu ◽  
Weizhe Zhang ◽  
Hui He ◽  
Yawei Liu

WirelessHART is a wireless sensor network that is widely used in real-time demand analyses. A key challenge faced by WirelessHART is to ensure the character of real-time data transmission in the network. Identifying a priority assignment strategy that reduces the delay in flow transmission is crucial in ensuring real-time network performance and the schedulability of real-time network flows. We study the priority assignment of real-time flows in WirelessHART on the basis of the multi-channel time division multiple access (TDMA) protocol to reduce the delay and improve the ratio of scheduled. We provide three kinds of methods: (1) worst fit, (2) best fit, and (3) first fit and choose the most suitable one, namely the worst-fit method for allocating flows to each channel. More importantly, we propose two heuristic algorithms—a priority assignment algorithm based on the greedy strategy for C (WF-C) and a priority assignment algorithm based on the greedy strategy for U(WF-U)—for assigning priorities to the flows in each channel, whose time complexity is O ( m a x ( N ∗ m ∗ l o g ( m ) , ( N − m ) 2 ) ) . We then build a new simulation model to simulate the transmission of real-time flows in WirelessHART. Finally, we compare our two algorithms with WF-D and HLS algorithms in terms of the average value of the total end-to-end delay of flow sets, the ratio of schedulable flow sets, and the calculation time of the schedulability analysis. The optimal algorithm WF-C reduces the delay by up to 44.18 % and increases the schedulability ratio by up to 70.7 % , and it reduces the calculation time compared with the HLS algorithm.


2018 ◽  
Author(s):  
Marialaura Bancheri ◽  
Francesco Serafin ◽  
Michele Bottazzi ◽  
Wuletawu Abera ◽  
Giuseppe Formetta ◽  
...  

Abstract. This work presents a package for the interpolation of climatological variables, such as temperature and precipitation, using Kriging techniques. The purposes of the study are (1) to present a geostatistical software easy to use and easy to plug-in in a hydrological model, (2) to show a practical example of an accurately designed software in the perspective of reproducible research, (3) to show the goodness of the software applications, in order to have a reliable alternative to other traditionally used tools. Ten 5 types of theoretical semivariograms and four types of Kriging were implemented and gathered into ObjectModelling System compliant components. The package provides real time optimization for semivariogram and kriging parameters. The software was tested using temperature and rainfall data retrieved from 97 meteorological stations in the Isarco River basin, Italy. For both variables, good interpolation results were obtained and then compared to the results from the R package, gstat.


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