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Wyświetlanie 1-15 z 594
Tytuł:
The Relationship between Impact Sensitivity of Nitroaromatic Energetic Compounds and their Electrostatic Sensitivity
Autorzy:
Zohari, N.
Seyed-Sadjadi, S. A.
Marashi-Manesh, S.
Powiązania:
https://bibliotekanauki.pl/articles/358443.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
energetic materials
nitroaromatic compounds
impact sensitivity
electrostatic sensitivity
safety
Opis:
This study presents a linear relationship between the impact sensitivity of nitroaromatic energetic compounds and their electric spark sensitivity. The methodology assumes that the impact sensitivity of a nitroaromatic energetic compound with the general formula CaHbNcOd can be expressed as a function of the electrostatic sensitivity, the number of NH2 group substitutions in the 2,4,6-trinitrophenyl ring and non-additive structural parameters. The root mean square and absolute standard deviation of a newly introduced correlation were respectively found to be 2.4 and 2.0 for 27 nitroaromatic energetic compounds. The proposed new correlation was also tested for 7 additional nitroaromatic energetic compounds, which have complex molecular structures such as 1-(2,4,6-trinitrophenyl)-5,7-dinitrobenzotriazole and 1,3,7,9-tetranitrophenoxazine.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 2; 427-443
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of nano-diamond in cosmetic microdermabrasion
Autorzy:
Janaszczyk, A.
Brzecka, P.
Chuchracki, M.
Mitura, K.
Powiązania:
https://bibliotekanauki.pl/articles/285882.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanodiamonds
microdermabrasion
sensitivity
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 87
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive finite elements based on sensitivities fortopological mesh changes
Autorzy:
Friederich, J.
Leugering, G.
Steinmann, P.
Powiązania:
https://bibliotekanauki.pl/articles/205694.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
adaptive mesh refinement
sensitivity-based refinement
topological sensitivity
asymptotic expansion
Opis:
We propose a novel approach to adaptive refinement in FEM based on local sensitivities for node insertion. To this end, we consider refinement as a continuous graph operation, for instance by splitting nodes along edges. Thereby, we introduce the concept of the topological mesh derivative for a given objective function. For its calculation, we rely on the first-order asymptotic expansion of the Galerkin solution of a symmetric linear second-order elliptic PDE. In this work, we apply this concept to the total potential energy, which is related to the approximation error in the energy norm. In fact, our approach yields local sensitivities for minimization of the energy error by refinement. Moreover, we prove that our indicator is equivalent to the classical explicit a posteriori error estimator in a certain sense. Numerical results suggest that our method leads to efficient and competitive adaptive refinement.
Źródło:
Control and Cybernetics; 2014, 43, 2; 279-306
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of deterministic signaling pathways models
Autorzy:
Puszyński, K.
Lachor, P.
Kardyńska, M.
Śmieja, J.
Powiązania:
https://bibliotekanauki.pl/articles/201589.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
signaling pathways
sensitivity analysis
Opis:
The paper is focused on application of sensitivity methods to analysis of signaling pathway models. Two basic methods are compared: local, based on standard sensitivity functions, and global, based on Sobol indices. Firstly, a general outline of modeling of signaling pathways by means of ordinary differential equations is briefly described. Afterwards, the methods of sensitivity analysis, known from literature, are introduced and illustrated with a simple example of a dynamical system of the second order. Subsequently, the analysis of the p53/Mdm2 regulatory module, which is a key element of any pathway involving p53 protein, is presented. The results of this analysis suggest that no single method should be chosen for investigation of any signaling pathway model but several of them should be applied to answer important questions about sources of heterogeneity in cells behavior, robustness of signaling pathways and possible molecular drug targets.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 471-479
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of planar mechanisms
Badania wrażliwości mechanizmów płaskich
Autorzy:
Romaniak, K.
Powiązania:
https://bibliotekanauki.pl/articles/281664.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
kinematics
planar mechanisms
sensitivity
Opis:
When designing a new mechanism, the designer has to know its kinematic parameters: position, velocity, acceleration, the number of design options, specific positions, motion ranges of particular links, effects of manufacturing tolerances of links and clearances in kinematic pairs on functioning of the mechanism. The latter parameter is associated with sensitivity of the mechanism, understood as its ability to respond to even minimal variations of the driving link position. The source of information about these parameters becomes the objective function obtained through the application of the modification method. This study explores the effects of clearances in kinematic pairs and structure of the mechanism on its sensitivity.
Konstruktor już na etapie projektowania mechanizmu chce wiedzieć, jakie będą jego właściwości kinematyczne. Interesują go położenia, prędkości, przyspieszenia, liczba opcji montażowych, położenia osobliwe, zakresy ruchu poszczególnych ogniw, wpływ tolerancji wykonania ogniw oraz luzów w parach kinematycznych na działanie mechanizmu. Ostatnia z wymienionych właściwości łączy się z pojęciem wrażliwości mechanizmu, rozumianej jako jego zdolności do reagowania na najmniejszą zmianę położenia ogniwa napędzającego. Źródłem informacji na temat wszystkich wymienionych właściwości jest funkcja celu otrzymana w wyniku stosowania metody modyfikacji. W niniejszym opracowaniu przedstawiono wpływ luzów w parach kinematycznych i struktury mechanizmu na jego wrażliwość.
Źródło:
Journal of Theoretical and Applied Mechanics; 2009, 47, 2; 473-482
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensory processing sensitivity and its relation to susceptibility to misinformation
Autorzy:
Sadowski, Szymon Kamil
Szpitalak, Malwina
Powiązania:
https://bibliotekanauki.pl/articles/2121400.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high sensitivity
sensory processing sensitivity
personality trait
misinformation effect
suggestibility
eyewitness testimony
Opis:
Sensory processing sensitivity is a relatively new theoretical construct. Its main components include deeper processing of stimuli as well as a stronger response to environmental impacts, both positive and negative. The effect of misinformation, which involves the inclusion of misinformation in the witness's memory reports, can be modified by varied factors, including personality characteristics. To the knowledge of the authors, no such research has been conducted so far and thereby the aim of the following study was to examine the relationship between the sensory processing sensitivity and susceptibility to the misinformation effect. Group studies were carried out according to the three-stage scheme of investigating the misinformation effect. After the original material was presented, the participants were exposed to a post-event material, containing the misinformation in the experimental group. Then the memory of the original material was tested. A strong misinformation effect was shown. Highly sensitive people, achieving the highest results in the Highly Sensitive Person Scale, were more resistant to the misinformation effect.
Źródło:
Polish Psychological Bulletin; 2022, 53, 2; 79-87
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Safe Control Sensitivity Functions in Matrix Game of Ships
Autorzy:
Lisowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/116375.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
matrix game
matrix game of ships
sensitivity
safe control
sensitivity functions
safe control sensitivity functions
ship control algorithm
Safety at Sea
Opis:
The paper describes the use of matrix game theory for the synthesis of safe control of a ship in collision situations. An analysis of the sensitivity of the ship control algorithm to the inaccuracy of process state information and changes in its parameters was presented. Sensitivity characteristics were compared on the example of the navigational situation in the Kattegat Strait for good and restricted visibility at sea.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 527-532
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new OSS design based on parameter sensitivity to changes in measurements
Autorzy:
Kalicka, R.
Bochen, D.
Powiązania:
https://bibliotekanauki.pl/articles/969953.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
optimal sampling schedule
sensitivity criterion
Opis:
As a result of the severe practical and ethical constraints imposed on medical measurements, the parameter estimation procedure designed for diagnosis and therapy is often a difficult problem. When blood sampling provides the data, the number of samples and the observation interval should be minimized. Designing an experiment for parameter estimation requires a step known as quantitative experiment design, usually preceded by a step called qualitative experiment design. The latter answers if a model is identifiable under particular experimental conditions. The former is suitable for the purpose of obtaining the maximum information from the data to be collected. An experiment design is based on the optimization of a suitable criterion formulated with respect to the analyzed variables of the experiment (input shape, sampling schedule). This paper considers sampling schedule design. New criteria for new optimal sampling schedules (OSS) have been formulated on the basis of sensitivity function. These are referred to as S-OSS and RS-OSS designs. The results of optimization for both criteria are compared with the result obtained with a reputable established D-optimal design based on the Fisher information matrix. By showing the results of S-OSS and RS-OSS design we can present the reliability and efficiency of the new criteria in comparison to D-OSS design. Illustrative examples are presented.
Źródło:
Control and Cybernetics; 2006, 35, 2; 385-406
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic analysis of implementing VMI model using game theory
Autorzy:
Stehel, Vojtěch
Vochozka, Marek
Kliestik, Tomas
Bakes, Vladimir
Powiązania:
https://bibliotekanauki.pl/articles/19090921.pdf
Data publikacji:
2019
Wydawca:
Instytut Badań Gospodarczych
Tematy:
VMI
game theory
sensitivity analysis
Opis:
Research background: The article deals with implementing VMI between the supplier and customer. To assess whether the system will be implemented, the evolution game theory is used. The contribution is based on the limitations of the study of the evolutionary game theory approach to modelling VMI policies (Torres et al., 2014) and its later extension, The evolutionary game theory approach to modelling VMI policies (Torres & García-Díaz, 2018). It aims is to complement the studies and provide a comprehensive picture of the issue. Purpose of the article: The main objective of the contribution is to respond to the question whether the VMI system will be introduced between the supplier and customer. Methods: In the first phase, the matrix is analysed from the point of view of the game meaning and its limit parameters. The limit parameters are set taking into account the economic reality. The only examined states of the matrix are those where the result is not obvious. For the purposes of the contribution, we work with a 5-year period. A new software capable of calculating evolutionary focus and their stability is created. Sensitivity analysis is carried out for the individual parameters that affect the system behaviour. Findings & Value added: Value added is a complex description of the system and complementation of previous studies in this field. VMI is confirmed. The results obtained can be used for practical management, so that the managers are able to identify what the actual costs are and what the probability of introducing the system is. At the same time, they can identify the parameters that can be influenced by them and observe their impact on the shift of the system introduction probability.
Źródło:
Oeconomia Copernicana; 2019, 10, 2; 253-272
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationships between Anxiety Sensitivity of Academics and Some Variables such as Gender, Age and Personality
Autorzy:
Yazici, Hikmet
Powiązania:
https://bibliotekanauki.pl/articles/16530191.pdf
Data publikacji:
2013-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
anxiety sensitivity
gender
age
personality
Opis:
Anxiety sensitivity (AS) has been defined as the fear of symptoms of anxiety. AS is connected with psychological and demographic variables. The author of this study sought to examine the relationships among academic staffs’ gender, age and AS with a sample of 355 practicing academic staff (female=133, male=222). Results showed that female academic staff have greater AS than their male colleagues. Results also revealed statistically significant relationships between age, moving away from social activities and AS. Implications for research and practice are discussed.
Źródło:
The New Educational Review; 2013, 34; 19-29
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of pressure sensitivity of modal birefringence of birefringent optical fibers using a Sagnac interferometer
Autorzy:
Kaczmarek, C
Wójcik, W
Powiązania:
https://bibliotekanauki.pl/articles/174434.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
birefringent fiber
birefringence
pressure sensitivity
Opis:
The paper presents a method of measuring the sensitivity of modal birefringence to pressure in birefringent optical fibers, based on a Sagnac interferometer with a birefringent fiber. In this method, the pressure sensitivity of modal birefringence of the optical fiber is determined on the basis of the measurement of the pressure sensitivity of the Sagnac interferometer including the fiber being measured, and the measurement of the group modal birefringence of that fiber, which is also performed by using the Sagnac interferometer. Utilizing the above method, measurements were performed of the pressure sensitivity of modal birefringence of birefringent optical fibers: a photonic crystal fiber and a bow-tie fiber, in the wavelength range 1460–1600 nm. Presented are the results of these measurements and their comparison with the results obtained by using different methods for the same types of fibers.
Źródło:
Optica Applicata; 2015, 45, 1; 5-14
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro activity of oxazaphosphorines in childhood acute leukemia: Preliminary report.
Autorzy:
Styczyński, Jan
Wysocki, Mariusz
Dębski, Robert
Balwierz, Walentyna
Rokicka-Milewska, Roma
Matysiak, Michał
Balcerska, Anna
Kowalczyk, Jerzy
Wachowiak, Jacek
Sońta-Jakimczyk, Danuta
Chybicka, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/1043830.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ALL
leukemia
sensitivity
glufosfamide
resistance
Opis:
Glufosfamide (β-D-glucosyl-ifosfamide mustard) is a new agent for cancer chemotherapy. Its pharmacology is similar to commonly used oxazaphosphorines, but it does not require activation by hepatic cytochrome P-450 and preclinically demonstrates lower nephrotoxicity and myelosuppression than ifosfamide. The aim of the study was a comparison of the drug resistance profiles of glufosfamide and other oxazaphosphorines in childhood acute leukemias. Leukemic cells, taken from children with ALL on diagnosis (n = 41), ALL on relapse (n = 12) and AML on diagnosis (n= 13) were analyzed by means of the MTT assay. The following drugs were tested: glufosfamide (GLU), 4-HOO-ifosfamide (IFO), 4-HOO-cyclophosphamide (CYC) and mafosfamide cyclohexylamine salt (MAF). In the group of initial ALL samples median cytotoxicity values for GLU, IFO, CYC and MAF were 15.5, 33.8, 15.7 and 7.8 μM, respectively. In comparison with initial ALL samples, the relative resistance for GLU and IFO in relapsed ALL samples was 1.9 (p = 0.049) and 1.3 (ns), and in initial AML samples 31 (p < 0.001) and 5 (p = 0.001), respectively. All oxazaphosphorines presented highly significant cross-resistance. Glufosfamide presented high activity against lymphoblasts both on diagnosis and on relapse.
Źródło:
Acta Biochimica Polonica; 2002, 49, 1; 221-225
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High order sensitivity analysis of a mistuned blisk including intentional mistuning
Autorzy:
Pohle, L.
Tatzko, S.
Panning-von Scheidt, L.
Wallaschek, J.
Powiązania:
https://bibliotekanauki.pl/articles/281842.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
turbine blades
mistuning
sensitivity analysis
Opis:
Small deviations between turbine blades exist due to manufacturing tolerances or material inhomogeneities. This effect is called mistuning and usually causes increased vibration amplitudes and also a lower service life expectancy of bladed disks or so called blisks (bladed integrated disk). The major resulting problem is to estimate the maximum amplitude with respect to these deviations. Due to the probability distribution of these deviations, statistical methods are used to predict the maximum amplitude. State of the art is the Monte-Carlo simulation which is based on a high number of randomly re-arranged input parameters. The aim of this paper is to introduce a useful method to calculate the probability distribution of the maximum amplitude of a mistuned blisk with respect to the random input parameters. First, the applied reduction method is presented to initiate the sensitivity analysis. This reduction method enables the calculation of the frequency response function (FRF) of a Finite Element Model (FEM) in a reasonable calculation time. Based on the Taylor series approximation, the sensitivity of the vibration amplitude depending on normally distributed input parameters is calculated and therewith, it is possible to estimate the maximum amplitude. Calculating only a single frequency response function shows a good agreement with the results of over 1000 Monte-Carlo simulations.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 353-368
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact Initiation of Compositions Ammonium Perchlorate with Inorganic Components
Autorzy:
Dubovik, A. V.
Kokovikhin, D. V.
Powiązania:
https://bibliotekanauki.pl/articles/357980.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
sensitivity to impact
ammonium perchlorate
Opis:
Experimental data on sensitivity to impact of compositions ultra- and nanodispersed AP with inorganic components are presented. Critical parameters of impact initiation of these compositions lay down on the straight line in co-ordinates (ecr, Pcr2) characterising balance of energy at the impact.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 4; 325-334
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Method for Predicting the Friction Sensitivity of Nitramines
Autorzy:
Keshavarz, M. H.
Hayati, M.
Ghariban-Lavasani, S.
Zohari, N.
Powiązania:
https://bibliotekanauki.pl/articles/358230.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
friction sensitivity
nitramine
correlation
safety
Opis:
This study presents a new simple correlation between friction sensitivity of nitramines and their molecular structures. This novel correlation can help chemists and chemical engineers to predict the friction sensitivity of new nitramines without using any experimental data, which is important for safety in industrial processes. The new correlation can also help to elucidate the mechanism of initiation of energetic materials by frictional stimuli. This new method assumes that friction sensitivity of a nitramine of general formula CaHbNcOd can be expressed as a function of the optimized elemental composition and the contributions of specific molecular structural parameters. The new correlation has root mean square and average deviations of 7.64 and 6.44 J, respectively, for 20 nitramines with different molecular structures. The proposed new method was also tested for 11 nitramines containing complex molecular structures.
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 2; 215-227
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 594

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