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  • 1
    Online Resource
    Online Resource
    Capabilities of Using Fem in Sheet-Metal Forming
    Walter de Gruyter GmbH ; 2016
    In:  Archives of Metallurgy and Materials Vol. 61, No. 2 ( 2016-06-1), p. 947-951
    Details
    In: Archives of Metallurgy and Materials, Walter de Gruyter GmbH, Vol. 61, No. 2 ( 2016-06-1), p. 947-951
    Abstract: The aim of this study was to determine and select boundary conditions of modeling and FEM simulation for plastic processing on the example of sheet-metal forming. For sheet-metal deformation analysis, Deform 3D has been used. The study presents research methods for real and virtual conditions. There are also described common features and these differentiating obtained results. Research of conducted process of sheet-metal forming allows to determine the effectiveness of computer research methods. The finite-element method can be used as an effective tool for the study of plastic processing phenomena considering various operating conditions of individual elements provided the appropriate tools for FEM analysis.
    Type of Medium: Online Resource
    ISSN: 2300-1909
    URL: Article
    DOI: 10.1515/amm-2016-0161
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 2509015-X
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  • 2
    Online Resource
    Online Resource
    New electrical tomographic method to determine dampness in historical buildings
    Walter de Gruyter GmbH ; 2016
    In:  Archives of Electrical Engineering Vol. 65, No. 2 ( 2016-06-1), p. 273-283
    Details
    In: Archives of Electrical Engineering, Walter de Gruyter GmbH, Vol. 65, No. 2 ( 2016-06-1), p. 273-283
    Abstract: This paper presents a new, nondestructive method of testing brick wall dampness in wall structures. The setup was used to determine the moisture in a specially built laboratory model. Topological methods and the gradient technique are used to optimize the approach. A forward model of a wall was constructed to solve the inverse problem resulting in moisture buildup inside the wall.
    Type of Medium: Online Resource
    ISSN: 2300-2506
    URL: Article
    DOI: 10.1515/aee-2016-0019
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 2636269-7
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  • 3
    Online Resource
    Online Resource
    State estimation in a decentralized discrete time LQG control for a multisensor system
    Walter de Gruyter GmbH ; 2017
    In:  Archives of Control Sciences Vol. 27, No. 1 ( 2017-03-1), p. 29-39
    Details
    In: Archives of Control Sciences, Walter de Gruyter GmbH, Vol. 27, No. 1 ( 2017-03-1), p. 29-39
    Abstract: In the paper a state filtration in a decentralized discrete time Linear Quadratic Gaussian problem formulated for a multisensor system is considered. Local optimal control laws depend on global state estimates and are calculated by each node. In a classical centralized information pattern the global state estimators use measurements data from all nodes. In a decentralized system the global state estimates are computed at each node using local state estimates based on local measurements and values of previous controls, from other nodes. In the paper, contrary to this, the controls are not transmitted between nodes. It leads to nonconventional filtration because the controls from other nodes are treated as random variables for each node. The cost for the additional reduced transmission is an increased filter computation at each node.
    Type of Medium: Online Resource
    ISSN: 2300-2611
    URL: Article
    DOI: 10.1515/acsc-2017-0002
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2676886-0
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  • 4
    Online Resource
    Online Resource
    A Lyapunov functional for a system with both lumped and distributed delay
    Walter de Gruyter GmbH ; 2017
    In:  Archives of Control Sciences Vol. 27, No. 4 ( 2017-12-1), p. 527-540
    Details
    In: Archives of Control Sciences, Walter de Gruyter GmbH, Vol. 27, No. 4 ( 2017-12-1), p. 527-540
    Abstract: In the paper construction of a Lyapunov functional for time delay system with both lumped and distributed delay is presented. The Lyapunov functional is determined by means of the Lyapunov matrix. The method of determination of the Lyapunov matrix for time delay system with both lumped and distributed delay is presented. It is given the example illustrating the method.
    Type of Medium: Online Resource
    ISSN: 2300-2611
    URL: Article
    DOI: 10.1515/acsc-2017-0031
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2676886-0
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  • 5
    Online Resource
    Online Resource
    Lyapunov Matrices Approach to the Parametric Optimization of a System with Two Delays
    Walter de Gruyter GmbH ; 2016
    In:  Archives of Control Sciences Vol. 26, No. 3 ( 2016-09-1), p. 367-381
    Details
    In: Archives of Control Sciences, Walter de Gruyter GmbH, Vol. 26, No. 3 ( 2016-09-1), p. 367-381
    Abstract: In the paper a Lyapunov matrices approach to the parametric optimization problem of time-delay systems with two commensurate delays and a P-controller is presented. The value of integral quadratic performance index of quality is equal to the value of the Lyapunov functional for the initial function of time-delay system. The Lyapunov functional is determined by means of the Lyapunov matrix.
    Type of Medium: Online Resource
    ISSN: 2300-2611
    URL: Article
    DOI: 10.1515/acsc-2016-0020
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 2676886-0
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  • 6
    Online Resource
    Online Resource
    Modelling of Noise Pollution Due to Heterogeneous Highway Traffic in India
    Walter de Gruyter GmbH ; 2019
    In:  Transport and Telecommunication Journal Vol. 20, No. 1 ( 2019-02-01), p. 22-39
    Details
    In: Transport and Telecommunication Journal, Walter de Gruyter GmbH, Vol. 20, No. 1 ( 2019-02-01), p. 22-39
    Abstract: Compared to homogeneous traffic flow, traffic speed variation is drastic with the involvement of heterogeneity. With an intent of studying the negative upshot of fluctuating speeds of heterogeneous traffic on the environment, the current paper is the outcome of the research done on various highways located in the states of Andhra Pradesh and Telangana in India, with an objective of developing a comprehensive noise prediction model by taking into account the traffic and roadway factors. Quantified noise levels [Leq (dBA) and L10 (dBA)] revealed that for the traffic speed variation of 10 to 95 kmph, the traffic noise levels were significantly affected by the variations in the proportion of the vehicle. On a specific note, the proposed model can be effectively used for the highway traffic noise prediction especially for the heterogeneous traffic, as the difference between the measured and predicted noise levels are within 1 to 10 dB (A).
    Type of Medium: Online Resource
    ISSN: 1407-6179
    URL: Article
    DOI: 10.2478/ttj-2019-0003
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2677597-9
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  • 7
    Online Resource
    Online Resource
    Plasma matrix metalloproteinase-9 and tissue inhibitor of matrix metalloproteinase-1 as prognostic biomarkers in critically ill patients
    Walter de Gruyter GmbH ; 2020
    In:  Open Medicine Vol. 15, No. 1 ( 2020-03-04), p. 50-56
    Details
    In: Open Medicine, Walter de Gruyter GmbH, Vol. 15, No. 1 ( 2020-03-04), p. 50-56
    Abstract: Matrix metalloproteinase 9 (MMP-9) plays an important role in inflammatory and pathological processes by enabling the inflow of leukocytes to the site of infection or tissue damage. MMP-9 and tissue inhibitor of metalloproteinase 1 (TIMP-1) have been described as potential prognostic biomarkers in various clinical settings. The aim of the study was to evaluate the usefulness of plasma levels of MMP-9 and TIMP-1 as well as the MMP-9/ TIMP-1 ratio in predicting the outcome in patients admitted to the intensive care unit (ICU). The study included 56 critically ill patients with multiple organ failure. Plasma levels of MMP-9 and TIMP-1 were determined on hospitalization day 1, 2, 3 and 7. Nineteen (35.7%) patients died. The level of TIMP-1 was statistically significantly higher on day 1 and 7 of hospitalization in non-survivors, as compared to survivors (p=0.01). A statistically significant positive correlation was found between MMP-9 and TIMP-1. The MMP-9/TIMP-1 ratio was comparable in both groups during of observation (0.62 on day 1). The MMP-9/TIMP-1 ratio was positively correlated with the level of lactate and negatively correlated with platelet count. Likewise, TIMP-1 was positively correlated with the level of lactate. The level of MMP-9 was higher in the non-survivor group only on day 7 of observation. In conclusion, although TIMP-1 and MMP-9 concentrations were higher in non-survivors and the MMP-9/TIMP-1 ratio was related to some parameters of critical illness, further research is needed to verify whether they can serve as reliable biomarkers for early prognostication of ICU patients.
    Type of Medium: Online Resource
    ISSN: 2391-5463
    URL: Article
    DOI: 10.1515/med-2020-0008
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2829380-0
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  • 8
    Online Resource
    Online Resource
    Assessment of disposable groundwater resources for hydraulic fracturing of gas shales in the Lublin Basin (eastern Poland)
    Walter de Gruyter GmbH ; 2014
    In:  Gospodarka Surowcami Mineralnymi Vol. 30, No. 4 ( 2014-12-1), p. 79-96
    Details
    In: Gospodarka Surowcami Mineralnymi, Walter de Gruyter GmbH, Vol. 30, No. 4 ( 2014-12-1), p. 79-96
    Abstract: W pracy dokonano prognozy zasobów wód podziemnych do wykorzystania w celu szczelinowania łupków gazonośnych w obszarze Basenu Lubelskiego w 2030 r. Jest to przydatne właścicielom koncesji na eksploatację gazu do planowania wielkości i harmonogramu wydobycia. W celu określe- nia dyspozycyjnych zasobów wód opracowano model bilansu wodno-gospodarczego, do którego jako podstawowe dane wejściowe wykorzystano dane z bilansu i prognozy zasobów wód podziemnych dla 2030 r. w dorzeczu Wisły. W modelu uwzględniono specyficzne czynniki determinujące wielkość zasobów wody na obszarach perspektywicznej eksploatacji gazu: zmniejszenie zasilania wód pod- ziemnych w wyniku zmian klimatu, nierejestrowany pobór wody w gospodarstwach indywidualnych, zapotrzebowanie na wodę związane z rozwojem górnictwa gazu łupkowego i stopnień zwrotu do obiegu hydrologicznego wody, wykorzystanej do szczelinowania. W celu uwzględnienia niepewności stopnia oddziaływania tych czynników w 2030 r., model wykonano dla dwóch scenariuszy: umiar- kowanie rygorystycznego ekologicznie i rygorystycznego ekologicznie, zakładającego duże skutki zmian klimatu i radykalne zwiększenie zapotrzebowania na wodę. Zasoby dyspozycyjne wód okreś- lono dla wydzielonych 12 stref bilansowych, zgodnych obszarowo z Jednolitymi Częściami Wód Podziemnych lub ich fragmentami znajdującymi się w obszarze badań. Prognoza dotyczy zasobów wód podziemnych bez stratygraficznego rozdziału na poziomy wodonośne. Zasoby wyniosą dla scenariusza I od 1 072 735 do 79 458 310 m 3 /rok w zależności od strefy. Dla scenariusza II odpo- wiednio od 733 285 do 49 103 085 m 3 /rok. Dla właścicieli koncesji na eksploatację gazu istotne są względne wartości zasobów wyrażone na jednostkę powierzchni, które wyniosą dla scenariusza I od 10 132 do 32 300 m 3 /(rok-km 2 ) w zależności od strefy i dla scenariusza II od 5 212 do 24 200 m 3 /(rok-km 2 ). Model bilansowy pozwala stwierdzić, że prognozowane na 2030 r. zasoby dyspozycyjne wód podziemnych w strefach bilansowych Basenu Lubelskiego są duże, więc rozwój górnictwa gazu łupkowego nie powinien wpłynąć negatywnie na stan ilościowy wód w tym obszarze.
    Type of Medium: Online Resource
    ISSN: 2299-2324
    URL: Article
    DOI: 10.2478/gospo-2014-0032
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2014
    detail.hit.zdb_id: 2676888-4
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  • 9
    Online Resource
    Online Resource
    Diversity of water level fluctuations in degraded Baltic raised bogs
    Walter de Gruyter GmbH ; 2017
    In:  Ochrona Srodowiska i Zasobów Naturalnych Vol. 28, No. 1 ( 2017-3-1), p. 1-7
    Details
    In: Ochrona Srodowiska i Zasobów Naturalnych, Walter de Gruyter GmbH, Vol. 28, No. 1 ( 2017-3-1), p. 1-7
    Abstract: The aim of paper is to present the diversity of water level fluctuations in degraded Baltic raised bogs. An attempt was made to answer the question how strong the diversity of fluctuations is both within each object and between two objects situated close to each other. Moreover, speed and value of the response of water level to atmospheric precipitation were analysed. The spatial scope of the paper covers two Baltic raised bogs in the lower part of the Łeba river valley: Czarne Bagno and Łebskie Bagno. The time scope covers years 2012-2014. The study found that both analysed bogs were a high dynamic in variation of groundwater level. Annual amplitudes of fluctuations in the water table was in the range of 28.4 to 77.9 cm (Łebskie Bagno) and of 45.6 to 105.0 cm (Czarne Bagno). It has been observed that lowering the water level on both peatlands always been recorded in the summer months, whilst the increase in the autumn, which lasted until spring. Retention and the water level on peatlands influenced primarily precipitation. Extreme meteorological conditions that make it less conspicuous is the variation resulting from factors such as location in different parts of the bog or type of degradation.
    Type of Medium: Online Resource
    ISSN: 2353-8589
    URL: Article
    DOI: 10.1515/oszn-2017-0004
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2832255-1
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  • 10
    Online Resource
    Online Resource
    Applicability of Business Rules to Production Management in Foundries
    Walter de Gruyter GmbH ; 2016
    In:  Archives of Foundry Engineering Vol. 16, No. 1 ( 2016-03-1), p. 85-88
    Details
    In: Archives of Foundry Engineering, Walter de Gruyter GmbH, Vol. 16, No. 1 ( 2016-03-1), p. 85-88
    Abstract: The size and complexity of decision problems in production systems and their impact on the economic results of companies make it necessary to develop new methods of solving these problems. One of the latest methods of decision support is business rules management. This approach can be used for the quantitative and qualitative decision, among them to production management. Our study has shown that the concept of business rules BR can play at most a supporting role in manufacturing management, but alone cannot form a complete solution for production management in foundries.
    Type of Medium: Online Resource
    ISSN: 2299-2944
    URL: Article
    DOI: 10.1515/afe-2016-0008
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 2818501-8
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