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1
Content available remote Computer Simulation of the Dynamic Behavior of Double Polymer Brush-Solvent Systems
Hałagan K., Banaszak M., Jung J., Polanowski P., Sikorski A.
Computational Methods in Science and Technology
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2021
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Vol. 27, No. 4
141--149
EN
Opposing polymer brush systems were investigated by computer simulations. In a coarse-grained model, chains were restricted to a face-centered cubic lattice with the excluded volume interactions only. The macromolecules were grafted onto two parallel impenetrable surfaces. The dynamic properties of these systems were studied by means of Monte Carlo simulations. The Dynamic Lattice Liquid model and a highly efficient parallel machine ARUZ were employed, which enabled studying large systems at long time scales. The influence of the surface grating density on the system dynamic was shown and discussed. It was demonstrated that the self-diffusion coefficient of solvent depended strongly on the grafting density.
2
Content available remote Technology of Real-World Analyzers (TAUR) and its practical application
Jung J., Kiełbik R., Hałagan K., Polanowski P., Sikorski A.
Computational Methods in Science and Technology
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2020
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Vol. 26, No. 3
69--75
EN
The article describes the most important details of the project for reconfigurable construction of dedicated electronic machines intended for performing analyses of phenomena that occur in multi-component systems containing at least several million mutually interacting elements. Devices built in the presented technology can be characterized by the use of reconfigurable integrated circuits, spatial construction ensuring scalability, a redundant panel system as well as specially developed data transmission and work control systems. Machines work in a parallel manner and can solve problems in various fields of science and technology by competing with the speed of data processing with the latest supercomputing systems. As an example, we present details of the ARUZ machine containing 26,000 FPGAs, which was made using this technology.
3
Content available remote From the Dynamic Lattice Liquid Algorithm to the Dedicated Parallel Computer – mDLL Machine
Jung J., Kiełbik R., Rudnicki K., Hałagan K., Polanowski P., Sikorski A.
Computational Methods in Science and Technology
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2018
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Vol. 24, No. 4
235--247
EN
The designing, production and testing of the mDLL machine led to the development of such a structure in which operational cells (e.g. KDLL) were located in the nodes of a three-dimensional torus network and the device was scalable. Thus, the future expansion of this device with additional Printed Circuit Boards (PCB) will not result in lengthened wire connections between Field-Programmable Gate Arrays (FPGA) or slow down the operation of the machine. The conducted tests confirmed the correctness of the adopted design assumptions and showed that by using mDLL one can effectively perform molecular simulations. Despite some structural shortcomings, the mDLL machine was a prototype that has already been sufficiently tested to allow the technology used in it to be used to build a device with a number of 1 million to 5 million KDLL cells. Such a device would already be suitable for simulating multi-particle systems with unprecedented speed.
4
Content available remote Od algorytmu dynamicznej cieczy sieciowej do dedykowanego komputera równoległego II – maszyna mDLL
Jung J., Kiełbik R., Rudnicki K., Polanowski P.
Przegląd Elektrotechniczny
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2017
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R. 93, nr 11
162--170
PL
W artykule opisano złożenia projektowe, budowę i realizację maszyny przeznaczonej do symulacji zjawisk zachodzących w wieloskładnikowych układach molekularnych. Przedstawiony system elektroniczny zbudowano przy użyciu programowalnych układów scalonych FPGA (w j. ang. Field Programmable Gate Array). W maszynie zaimplementowano model dynamicznej cieczy sieciowej (ang. dynamic lattice liquid - DLL) i wykonano testy jej działania.
EN
The article describes the assumption of design, construction and implementation of a machine intended to simulate the phenomena occurring in complex molecular systems. Presented electronic system was built with the Field Programmable Gate Array (FPGA). In the machine was implemented a model of Dynamic Lattice Liquid (DLL) and the tests of the device operation was performed.
5
Content available remote Development of single-filter Doppler signal discrimination method for incoherent Doppler lidar system
Choi S., Baik S., Park S., Song I., Kim D., Jung J.
Optica Applicata
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2012
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Vol. 42, nr 3
545-553
EN
In this paper, we present a single-filter Doppler signal discrimination method for an incoherent Doppler lidar system that has been developed by the Korea Atomic Energy Research Institute. For the incoherent Doppler system, we use an injection-seeded pulsed Nd:YAG laser as a transmitter and an iodine filter as a Doppler frequency discriminator. To reduce the temperature-dependence error, a single iodine filter is used to lock the laser frequency and to detect the Doppler frequency shift. The mean squared error of the frequency locking process is 3.87 MHz, which corresponds to a wind velocity detection limit of approximately 1.04 m/s. The range and velocity measurements are performed using a tunable rotating disc. The results are consistent with those of previous studies in terms of the correlation between the signal ratio (signal/reference) and the actual speed of the rotating disc.
6
Content available remote Special Purpose Parallel Computer for Modelling Supramolecular Systems based on the Dynamic Lattice Liquid Model
Polanowski P., Jung J., Kielbik R.
Computational Methods in Science and Technology
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2010
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Vol. 16, No. 2
147-153
EN
A predictive description of the synthetic processes leading to complex macromolecules requires consideration of the spatial models. Hierarchical, structural and dynamic complexities of such systems require new methodological developments. The presented work provides effective tools for the modelling of the complex synthetic processes in the 3D space under controlled conditions. We propose constructing a parallel computing system which realizes the 3D architecture and the cooperative dynamics based on the dynamic lattice liquid (DLL) model. This can create new standards in the spatial resolution of the models allowing simulations of the systems comparable in sizes and complexity with the biological cells in the future.
7
Content available remote Od algorytmu dynamicznej cieczy sieciowej do dedykowanego komputera równoległego
Polanowski P., Jung J., Kiełbik R., Napieralski A., Lichy K.
Przegląd Elektrotechniczny
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2008
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R. 84, nr 11
69-73
PL
W tym artykule przedstawiamy koncepcję i realizację dedykowanego komputera równoległego opartego na modelu dynamicznej cieczy sieciowej (ang. dynamic lattice liquid DLL). Jest to złożony układ elektroniczny, który zbudowano przy wykorzystaniu programowalnych tablic logicznych (ang. Field Programmable Gate Array FPGA).
EN
In this text we discuss conception and hardware realization of dedicated parallel computer based on dynamic lattice liquid algorithm (DLL). It is very complex electronic circuit which is built with use of Field Programmable Gate Array – FPGA.
8
Content available remote Photovoltaic effect in novel polysilane with phenothiazine rings and its blends with fullerene
Rybak A., Jung J., Ciesielski W., Ulanski J.
Materials Science Poland
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2006
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Vol. 24, No. 2/2
527--534
EN
Investigations of the photogeneration process and photovoltaic effect in recently synthesized polysilane and its mixtures with fullerene (C60) are reported. Dependencies of the photogeneration quantum yield on the wavelength of the exciting radiation and on electric field were determined by the surface potential decay technique. It was found that addition of C60 improves the photogeneration efficiency. The Onsager model was used to analyse the obtained results. To check potential application properties of the investigated material, the photovoltaic effect was investigated in devices with an active layer made of mixtures of polysilane and C60. It was found that the power conversion efficiency of the device is dependent on the C60 concentration, the photovoltaic effect was observed, however, even if the amount of C60 was low (5 wt. %).
9
Kolejowe przewozy materiałów niebezpiecznych w świetle kontroli Państwowej Inspekcji Pracy
Jung J.
Przegląd Kolejowy
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1998
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Nr 8
10-12
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