Running and testing Java EE applications in embedded mode with JupEEter framework

This paper presents a design and usage of the author’s innovative framework, called JupEEter. This framework helps running and testing Java Enterprise Edition (Java EE) applications [1] and to use Java EE components in Java SE [2] applications. The framework defines the application server and application life-cycle and exploits annotation based programming technique for its configuration

Evaluation of Noise Level at the Position of Water Cutter Operator at Selected Enterprise

The subject of this publication is to assess the exposure of the water jet operator to the noise hazard. The publication presents basic information about noise in the work environment. Next, the procedure of noise measurement in the work environment was discussed and the results of tests carried out at the water jet operator's station for three basic activities were presented, ie: (1) plotter support, supervision of the cutting process, loading and receiving material, (2) auxiliary, transport and cleaning, (3) computer service, keeping documentation, hygienic and social break. The noise level test included the determination of: the maximum sound level A LAmax the peak sound level C LCpeak, the noise exposure level related to the 8-hour work day LEX,8h. Based on the obtained measurement results, it can be stated that the exposure to noise at the station of the waterjet operator is at an acceptable level

Influence of ageing process on the microstructure and mechanical properties of aluminium-silicon cast alloys - Al-9%Si-3%Cu and Al-9%Si-0.4%Mg

The aim of this thesis is to investigate the influence of ageing process on the microstructure and mechanical properties of aluminium-silicon alloys. The investigation was carried on Al-9%Si-3%Cu and Al-9%Si-0.4%Mg. To obtain different DAS with low content of oxide films and micro shrinkage, gradient solidification has been used. The specimens were treated according to T6 heat treatment. In this thesis it has been shown that solidification rate has great influence on mechanical properties since it controls microstructure. To reach peak level of mechanical properties different times of artificial ageing were used depending on the alloy. In peak value condition Yield’s Strength of alloys was 197MPa for Al-Si-Cu alloy and 243MPa for Al-Si-Mg one. These results can be compared to these presented in other papers concerning aluminium silicon alloys. Such comparison shows that when talking about potential of alloy, these results are more or less the same as in other articles in this field. The work was conducted within 10 weeks and for this reason not all the necessary data was collected. Further work will be conducted to obtain missing results, like overaged state for Al-Si-Cu alloy

Systoliczne przetwarzanie sygnałów cyfrowych

Ogromne zapotrzebowanie na szybkie techniki przetwarzania dużej liczby danych, przyczyniło się do powstania dotychczas nieznanych koncepcji algorytmów czasowo-przestrzennych, jak również nowych rozwiązań sprzętowych wynikających z rozwijającej się w wielkim tempie technologii światowych. Jednym z rozwiązań, są specjalnego typu układy tzw. tablice systoliczne (ang. systolic arrays). Tablice systoliczne są to układy wieloprocesorowe specjalnych zastosowań, w których algorytmy czasowo-przestrzenne są ściśle dopasowane do architektury sprzętu. Wydajność obliczeniowa tablic systolicznych jest wynikiem przetwarzania równoległego i potokowego. Monografia jest podzielona na trzy części. Pierwsza omawia podstawowe algorytmy systoliczne w zastosowaniu do zagadnień algebry macierzy, mnożenia i dzielenia wielomianów, operacji splotu, dyskretnych transformat i sztucznych sieci neuronowych. Część druga omawia wykorzystanie grafów zależności i grafów przepływu sygnałów do projektowania tablic systolicznych . Oparta jest na opracowanej oryginalnej metodzie projektowania układów VLSI. Część trzecia przedstawia podstawowe cechy jakimi powinny charakteryzować się tablice systoliczne dla zagadnień morfologii matematycznej. Monografia przeznaczona jest dla studentów, doktorantów oraz specjalistów w zakresie różnych dyscyplin naukowych, np. informatyków i elektroników, którzy zajmują się przetwarzaniem sygnałów i ich zastosowaniem

Scheduling system for distributed transaction processing

This chapter describes a method of integration of IT systems working with many shared database storage in distributed environment. Following sections describe new elements in distributed environment: agents, naming service and coordination service. Every IT system pass all transactions on individual agent, that suspend their execution. Agent register suspended transaction in naming service, obtaining binary representation of their resource data. Registered transaction is requested by agent in central coordination service. Detection of conflict between transactions is realized by coordinator service and assures data integrity by controlling the execution of requested transactions. This feature eliminates deadlock and possibility of transactions rollbacks due to data conflicts. Besides theoretical description authors introduce formula for transaction conflict detection. The algorithm of conflicts detection is designed to be executed on a special hardware accelerator based on a systolic array

Why Determining the Native Length Change Pattern of Medial Patellofemoral Ligament Is Still a Challenge: State-of-the-Art Review of Potential Sources of Heterogeneity within Studies Evaluating Isometry of MPFL

Background: In the literature there are divergent results as to the native MPFL length change pattern. The reason for such divergent results may be the heterogeneity of design of studies analyzing MPFL isometry. The hypothesis of this review was that studies assessing MPFL length change pattern are highly heterogenous. The aim was to present a state-of-the-art review of sources of this heterogeneity. Materials and Methods: A total of 816 records were identified through the initial search of MEDLINE and Scopus databases. After eligibility assessment, 10 original articles and five reviews were included. In the included studies, the following 15 potential sources of heterogeneity were assessed: number of patients/cadavers, age, males to females ratio (demographics), identification of measured fibers, measurement method, measurement precision, quadriceps muscle activity, iliotibial band activity, hamstrings activity (study design), patellar height, trochlear or patellar dysplasia, femoral anteversion, mechanical axis of the limb, tibial tubercle–trochlear groove distance, and condylar anteroposterior dimensions (morphology). Each variable was graded in every included article with 1 point if reported precisely and not introducing bias; or with 0 points if reported not precisely, introducing bias, or not reported at all. Results: Within original articles, the highest achieved score was 10 out of 15 possible points with mean score of 6.7, SD = 2.37, and minimum score of just 3 out of 15 points. In the demographics section, mean score was 2.4, SD = 0.8 (80% of maximum possible score of 3); in the study design section it was 3.1, SD = 1.87 (52% of maximum possible score of 6); and in the morphology section it was 1.5, SD = 1.43 (25% of maximum possible score of 6). Conclusions: There is high heterogeneity and incomplete reporting of potential sources of bias in studies assessing native MPFL length change pattern. Future investigators should be aware of the presented factors and their potential impact on MPFL isometry. All methodologic factors should be meticulously reported. Detailed description of demographic data is already a standard; however, authors should more extensively report variables concerning study design and morphology of patients’ patellofemoral joint. Furthermore, future studies should try to meticulously simulate the real-life working environment of MPFL and ensure usage of proper measurement methods

Flow Rate Control by Means of Flow Meter and PLC Controller

This paper presents a design of a flow meter based on a programmable logic controller (PLC). The new construction of a flow meter controlled by PLC increases the possibilities for the control and automation of fluid flow. Additionally, the didactic potential of the use of simple automation in the form of a programmable logic controller was considered. A device enabling the measurement of fluid flow rate based on a PLC controller was designed, constructed, and tested. The choice of device was the Gems Sensors FT-210 series turbine flow sensor, which is characterized by low purchase and maintenance costs. The properties and the chemical resistance of polyamide-12, the material the sensor is made of, make it possible to test the flow of various types of fluids. As part of the work, an algorithm and a program controlling the device was developed based on the APB Soft software, enabling the accurate reading of the number of impulses sent by the turbine flow sensor. The results of the designed flow meter were compared with the results obtained for the Krohne VA-40 high accuracy rotameter