Mechanism of processes scheduling in multi-agent system for aided design of control systems

W artykule przedstawiono mechanizm szeregowania procesów (symulacji) w systemie wieloagentowym wspomagającym projektowanie układów sterowania. Zaimplementowany algorytm ma za zadanie przydzielanie poszczególnych procesów do jednostek obliczeniowych, tak aby minimalizować czas przetwarzania zapytań przez system. Szeregowanie procesów pozwoliło na zwiększenie wydajności systemu wieloagentowego na poziomie 245%.In this paper the new mechanism of processes scheduling in multi-agent systems is presented. This mechanism is based on the assumption that incoming requests shall be scheduled and processed by the least loaded unit. Implementation of the algorithm improved the multi-agent system performance at the level of 245% by reducing the time of request processing

Impact analysis of data transmission on efficiency of distributed control systems

W artykule przedstawiono zagadnienia związane z transmisją danych w rozproszonych systemach sterowania. Opisano cechy charakterystyczne przemysłowych sieci i protokołów informatycznych. Utworzono model rozproszonego systemu sterowania poziomem cieczy w zbiorniku, w którym komunikacja oparta została na protokole Modbus RTU. Na podstawie zmian parametrów transmisji danych wykazano, że poprawna komunikacja pomiędzy elementami systemu ma kluczowe znaczenie w zapewnieniu odpowiedniej jakości sterowania.This paper describes common issues related to data transmission in distributed control systems. Main features of industrial networks and communication protocols were presented. Model of distributed control system liquid level in the tank was developed, where data transmission was based on Modbus RTU protocol. Results of changing data transmission parameters proved that correct communication between system components is essential in ensuring proper control quality

Distributed multi-agent system for aided design of chosen control systems

W artykule przedstawiono system wieloagentowy wspomagający projektowanie wybranych układów sterowania sterami strumieniowymi. Zaimplementowany system składa się z czterech niezależnych programów komputerowych (agentów), które poprzez realizację unikalnych algorytmów oraz wzajemną komunikację dobierają odpowiednią strukturę i elementy układu sterowania oraz po przeprowadzeniu badań symulacyjnych dokonują oceny jakości otrzymanego rozwiązania projektowego.In this paper the distributed multi-agent system for aided design of chosen control systems is presented. Implemented system consists of four independent software agents: Interface Agent (gathers and initially validates the data from user designer), Master Agent (supervises the design process by delegating tasks to particular agents and enables deployment of machine learning algorithms), Matlab Agent (loads the necessary items from the database, creates a control system model and conducts dynamic calculations for the designed structure), Expert Agent (evaluates the simulation results regarding the suitability of generated solution and provides a report for system user). The outcome of the system activity is a ready-made solution concerning an appropriate structure and elements of the thruster control system

Effect of soil inundation on its properties in the Region of Swiecko during summer flooding

The present experiments were earned out pn the soilrf of the Rybocice polder near Swiecko, which was purposefully flooded with waters of the Odra river during the summer flood of' 1977 that causet complete destruction of crops and meadow sward. The flooded areas remained under water for more than 30 days. The dominant soils found in this area are river alluvial soils (Fluvi- sols) of varying texture. Rceause of their location and poorly operating drainage system, the discussed soils are periodically too wet by nature or water-logged. In the spring (March/April) of 1998 the ground water table occurred at the depth of 30 cm on damaged grasslands and at 90 cm on some arable Holds. The content of organic carbon ranged from 0.7 to 3.2% in horizon A with depth of approximately 30 cm. Soil reaction was found to vary considerably - from pH (KCI) 4.2 to pH 7.6. Long purposeful inundation with flood waters was not found to have caused significant negative effects on chemical properties of the examined soils. No noticeable contamination with heavy metals (Pb„ Cu, Zn, Cd, Cr and Mn) or polieyclic aromatic hydrocarbons (PAH) was observed. Bulk density in this region, without any treatment from the period of flooding to the spring of 1998 was approximately 1.60 Mg/m3 as compared with 1.40 Mg/m3 on the field cultivated (ploughed) in spring and sown with spring cereal. The mean crop yield in 1998, when appropriate agro-techniques were applied, did not vary significantly from the long-term averages

Business Administration

of the importance of safety, and the potential benefits for both the general public and the commercial vehicle industry of improving safety, the main goal of this project is to identify those commercial vehicle-related technologies that, through successful adoption, have had a positive impact on the safety of motor carrier companies. This is examined through two perspectives—one simply examining the effect of a technology implementation on safety and the second identifying the effect of a successful adoption of a technology on safety. It is hypothesized that technologies with factors that lead to successful adoption will have a greater safety impact. Negative binomial regression models with the dependent variables of three separate measures of safety are utilized to test each technology, and the overall results are mixed. The models for onboard safety monitoring technologies (that did not rate high on average for any adoption factor) illustrate no significant effect on safety; however, the models for technologies in both the freight mobility area and the electronic clearance area illustrate a negative effect on safety. In addition, the results for two specific technologies reveal that the companies that implement these technologies and rate the adoption factors higher (e.g., successfully adopted the technology) are likely to have fewer accidents than companies that implement these technologies and rate th

Patient specific outcomes of charged particle therapy for hepatocellular carcinoma : a systematic review and quantitative analysis

Hepatocellular carcinoma (HCC) is a raising condition world-wide. Most of patients are ineligible for surgery at diagnosis due to the advanced stage of the disease or poor medical condition of the patient. Charged particle therapy (CPT) is a radiotherapy modality showing promising results. The aim of this systematic review was to summarize current knowledge on patient-specific outcomes of CPT for HCC, including overall survival, local control, the effect of radiation dose and the toxicity burden. The systematic review was performed according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). After comprehensive database search 17 cohorts (16 studies, 1516 patients) were included into qualitative and quantitative analyses; 11 of 16 studies were retrospective. Eleven studies were on protons, 2 studies were on protons and carbon ions and 4 on carbon ions alone, were identified. Median BED10 (biologically equivalent dose) range was 68.75\u2013122.5 GyE. Mean weighted overall survival across studies was 86%, 62%, 59% and 35% at 1, 2, 3 and 5 years, respectively. Mean weighted local control was 86%, 89%, 87% and 89% at 1, 2, 3 and 5 years, respectively. Adjusted morbidity rates were: 54% for acute G1-2 toxicities and 6% for acute 65G3 toxicities; 9% for late G1-2 toxicities and less than 4% for late 65G3 toxicities. There was no treatment-associated mortality. Conclusions: CPT offers high local control, acceptable overall survival and low post-treatment morbidity. Quality of findings, especially on toxicities, is decreased by incomplete reporting and retrospective designs of available studies. Therefore, there is a strong need for better reporting and prospective studies

Identification of probable teleangiectatic osteosarcoma from a dog skull from multicultural settlement Polwica-Skrzypnic in Lower Silesia, Poland

This report presents canid cranial skeletal pathology from an excavation associated with the Przeworsk culture (III c. BC - V c. AD). The dog skull, an intentional inhumation, was dated to the Roman influence and the Migration period (I - V c. AD. The dog was a relatively large animal with a shoulder height calculated as approximately 60\u2009cm. Massive bone changes localized on the facial surface of the left maxilla required a multistage diagnostic protocol. In addition to traditional macroscopic and morphometric evaluation, we used modern diagnostic imaging techniques such as digital radiography, computed tomography and 3D reconstruction. These, along with histopathological studies, allowed us to identify a primary malignant bone tumor: telangiectatic osteosarcoma