Skocz do pozycji: 1.

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

/5

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Skocz do pozycji: 2.

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

/5

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Skocz do pozycji: 3.

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

/5

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Skocz do pozycji: 4.

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

/5

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Skocz do pozycji: 5.

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

/5

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Skocz do pozycji: 6.

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

/5

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Skocz do pozycji: 7.

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

/5

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Skocz do pozycji: 8.

Tytuł:

The Highly Sensitive Child as a challenge for education – introduction to the concept

Autorzy:

Baryła-Matejczuk, Monika
Artymiak, Małgorzata
Ferrer-Cascales, Rosario
Betancort, Moises

Powiązania:

https://bibliotekanauki.pl/articles/1386935.pdf

Data publikacji:

2020-03-31

Wydawca:

Uniwersytet Gdański. Wydawnictwo Uniwersytetu Gdańskiego

Tematy:

highly sensitive child
children’s development environment
early education
environmental sensitivity
sensory processing sensitivity

Opis:

The main aim of this paper is to summarize available findings related to the subject of high sensitivity from both the educational and parenting perspectives. According to the authors of the concept of Sensory Processing Sensitivity (SPS), between 15% and 20% of the population exhibit such traits, therefore one has to say that it is necessary to raise the awareness of this subject amongst parents and teachers. High sensitivity may exhibit itself in many ways, depending on the environmental and other temperamental conditions. Understanding its main characteristics (DOES) will allow one to appreciate the potential of this condition instead of focusing on its deficiencies. Such a perspective opens up possible avenues of supporting the Highly Sensitive Child’s resources by both parents and teachers. A review was carried out to answer a research question by collecting and summarizing theo-retical and empirical evidence that fits pre-specified eligibility criteria. The study selection criteria was to find literature/paper reviews and primary studies published in indexed journals included in various databases and focused on Sensory Processing Sensitivity directly, transdisciplinary and ho-listic approaches were central to the process. In the research strategy, the following databases were consulted: PSYCinfo, Scopus and PubMed. The keywords sensory processing, sensitive, environ-mental sensitivity, education were placed in all electronic databases and set to be found in the titles, abstracts or keywords of the documents. No limits on dates were established. At the preparation stage, articles relevant to the topic were selected and supplemented with publications related to child development and educational context. The search was conducted from December 2018 to July 2019.

Źródło:

Problemy Wczesnej Edukacji; 2020, 48, 1; 51-62
1734-1582
2451-2230

Pojawia się w:

Problemy Wczesnej Edukacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Measurement of sensitivity of solar blind UV cameras to solar light

Autorzy:

Chrzanowski, Krzysztof
Stafiej, B.

Powiązania:

https://bibliotekanauki.pl/articles/1818213.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

solar sensitivity
SBUV cameras
solar blind UV cameras
UV cameras sensitivity
corona discharge detection

Opis:

Solar blind UV cameras are not theoretically supposed to be sensitive to solar light. However, there is practically always some sensitivity to solar light. This limited solar sensitivity can sometimes make it impossible to detect the weak emission of a corona target located on the solar background. Therefore, solar sensitivity is one of the crucial performance parameters of solar blind UV cameras. However, despite its importance, the problem of determining solar sensitivity of solar blind UV cameras has not been analysed and solved in the specialized literature, so far. This paper presents the concept (definition, measurement method, test equipment, interpretation of results) of measuring solar sensitivity of solar blind UV cameras.

Źródło:

Opto-Electronics Review; 2021, 29, 2; 45--58
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

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

/5

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Skocz do pozycji: 11.

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

/5

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Skocz do pozycji: 12.

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

/5

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Skocz do pozycji: 13.

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

/5

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Skocz do pozycji: 14.

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

/5

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Skocz do pozycji: 15.

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

/5

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Skocz do pozycji: 16.

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 (e^cr, P^cr2) 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

/5

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Skocz do pozycji: 17.

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

/5

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Skocz do pozycji: 18.

Tytuł:

Characteristics of Melt Cast Compositions Based on cis-1,3,4,6-Tetranitrooctahydroimidazo-[4,5 d] imidazole (BCHMX)/TNT

Autorzy:

Elbeih, A.
Zeman, S.

Powiązania:

https://bibliotekanauki.pl/articles/358268.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

nitramines
BCHMX
sensitivity
detonation
brisance

Opis:

cis-1,3,4,6-Tetranitrooctahydroimidazo-[4,5 d]imidazole (BCHMX) is a new bicyclic nitramine which has been prepared using a two-stage synthetic method. In this work, a new melt cast composition based on BCHMX/TNT (60/40 by wt.) was prepared. For comparison purposes, Composition B based on RDX (1,3,5-trinitro1,3,5-triazacyclohexane)/TNT (60/40 by wt.), and HMX (1,3,5,7-tetranitro-1,3,5,7tetraazacyclooctane)/TNT (60/40 by wt.) were also studied. Impact and friction sensitivities of these compositions and of the individual explosives were determined. The detonation velocities were measured experimentally. The performance of the compositions prepared was studied by measuring the brisance using the Kast method. The detonation parameters of the compositions and the individual explosives were calculated using the EXPLO5 thermodynamic code. The results show that mixing these nitramines with TNT decreases their sensitivities. BCHMX/TNT is more sensitive to impact and friction than Composition B while it has higher detonation parameters, at the same level as HMX/TNT. In comparison, BCHMX/TNT has the highest relative brisance of the compositions studied. It is postulated that the higher performance characteristics of BCHMX and compositions based on it, in comparison with those of HMX, are due to a higher positive heat of formation for this nitramine.

Źródło:

Central European Journal of Energetic Materials; 2014, 11, 4; 501-513
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Insensitive HMX (Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) Nanocrystals Fabricated by High-Yield, Low-Cost Mechanical Milling

Autorzy:

Wang, Y.
Jiang, W.
Song, X.
Deng, G.
Li, F.

Powiązania:

https://bibliotekanauki.pl/articles/358912.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

nanoexplosives
HMX
thermal decomposition
sensitivity

Opis:

A mechanical approach had been adopted for fabricating HMX nanoparticles. This fabrication method avoided the recrystallization process and was different from the traditional methods employed to prepare nanoexplosives. In particular, the high yield and low cost increased the possibility of its industrial application. Specifcally, HMX particles, that had a mean size of 0.27 μm, were prepared by mechanical milling; a signifcant proportion of nano-HMX (<100 nm) were present and these were observed by TEM and SEM images. The thermal decomposition of HMX samples before and after pulverization was investigated by TG/DSC analysis. The results indicated that there was no obvious difference between the thermographs of raw and pulverized HMX. The HMX samples were investigated by friction, impact, and shock sensitivity tests. High safety was confrmed since pulverized HMX was far more insensitive than raw HMX; indeed the shock sensitivity of pulverized HMX was about 60 percent lower than that of raw HMX.

Źródło:

Central European Journal of Energetic Materials; 2013, 10, 2; 277-287
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Ethical sensitivity, job satisfaction and related factors of the nurses working in different areas

Autorzy:

Tural Buyuk, E.
Rizaral, S.
Güdek, E.

Powiązania:

https://bibliotekanauki.pl/articles/1916723.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Medyczny w Białymstoku

Tematy:

Nursing
Job Satisfaction
Ethical Sensitivity

Opis:

Introduction: Defined as the ability to recognize an ethical problem, ethical sensitivity is closely related to nurses' professional experience and job satisfaction.Purpose: To determine the ethical sensitivity, job satisfaction and related factors of nurses working in different areas.Materials and methods: This research was a descriptive study. Participants were 160 nurses working at Samsun Ondokuz Mayıs University, Health Application and Research Center in Samsun, Turkey. The permission of institution and Medical Research Ethics Committee approval were obtained. After getting permission from the top management of hospitals, information about the study was given to nurses. Those willing to participate were informed that participation was voluntary and invited to give written consent before data collection. For data collection purposes, the researchers used Personal Information Form, Ethical Sensitivity Questionnaire, and Minnesota Satisfaction Questionnaire.Results: In our study 70.6% of the nurses stated that they chose the profession willingly, 48.8% had 1-5 years of professional experience, and 45% stated that they had ethical problems in their professional life. Total score of nurses in the ethical sensitivity and job satisfaction scales was found to be at moderate level. Job satisfaction of single nurses that were in the 40 and over age group that performing their duties willingly was found to be statistically significantly higher than other groups (p <0.05).Conclusion: There was no relationship between nurses' total score averages of job satisfaction and total score averages of ethical sensitivity

Źródło:

Progress in Health Sciences; 2015, 5, 1; 138-149
2083-1617

Pojawia się w:

Progress in Health Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Sources of uncertainty for the Determination of Chlorpyrifos by Gas Chromatography Equipped with Flame Photometric Detector

Autorzy:

Zalat, O. A.
Elsayed, M. A.
Fayed, M. S.
Abd El Megid, M. K.

Powiązania:

https://bibliotekanauki.pl/articles/411973.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

sensitivity
Minimum detectability
Chlorpyrifos
injection

Opis:

Analysts are increasingly being required to evaluate the uncertainty associated with methods. Estimating the uncertainty of an analytical result is an essential part of quantitative analysis. This paper discusses the sources of uncertainty of chlorpyrifos determination by gas chromatography equipped with flame photometric detector (GC-FPD). The analysis was performed on HP-5 MS, 30 m x 0.32 mm capillary column with a 0.25 μm stationary film thickness using ultra pure nitrogen (99.9999 %) as a carrier gas at 25 psi constant pressure. The method has been optimized. Factors affecting quantization of chlorpyrifos such as injector temperature, carrier gas inlet pressure, air to hydrogen ratios and initial temperature program have been studied to get the best sensitivity, minimum delectability. The liner range of the detector was from 0.15 ng/ml to 1200 ppm, the minimum detection limit was 0.15 ng/ml and the relative standard deviation was 0.839.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 6; 8-55
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Attainability analysis in the problem of stochastic equilibria synthesis for nonlinear discrete systems

Autorzy:

Bashkirtseva, I.
Ryashko, L.

Powiązania:

https://bibliotekanauki.pl/articles/330694.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

stochastic sensitivity function
attainability
chaos suppression

Opis:

A nonlinear discrete-time control system forced by stochastic disturbances is considered. We study the problem of synthesis of the regulator which stabilizes an equilibrium of the deterministic system and provides required scattering of random states near this equilibrium for the corresponding stochastic system. Our approach is based on the stochastic sensitivity functions technique. The necessary and important part of the examined control problem is an analysis of attainability. For 2D systems, a detailed investigation of attainability domains is given. A parametrical description of the attainability domains for various types of control inputs in a stochastic Henon model is presented. Application of this technique for suppression of noise-induced chaos is demonstrated.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2013, 23, 1; 5-16
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Sensivity and design of fiber layout in composites

Autorzy:

Dems, K.

Powiązania:

https://bibliotekanauki.pl/articles/279497.pdf

Data publikacji:

2000

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

sensitivity analysis
composites
fiber layout
optimization

Opis:

For a linear structure reiforced with elastic fibers, the first variation of an arbitrary behavioral functional corresponding to variation of shape or orientation of fibers is derived by using the direct approach to sensivity analysis. The relevant optimality conditions for optimal design and identification problems are then derived. Both the static and dynamic loading cases are considered. Some simple examples illustrate the applicability of the presented approach.
Wrażliwość i projektowanie ułożenia włókien w kompozycie. W pracy rozpatrzono pierwszą wariację dowolnego funkcjonału związaną z wariacją kształtu lub orientacji wzmacniających włókien w płaskiej liniowo-sprężystej tarczy. Wrażliwości rozpatrywanego funkcjonału wyznaczono wykorzystując metodę bezpośrednią analizy wrażliwości. Następnie sformułowano typowy problem optymalnego projektowania oraz problem identyfikacyjny i wyznaczono odpowiednie warunki optymalności. Rozpatrzono zarówno przypadek obciążeń statycznych, jak i dynamicznych.

Źródło:

Journal of Theoretical and Applied Mechanics; 2000, 38, 4; 807-818
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Elasto-plastic limit loads of cylinder-cone configurations
Sprężysto-plastyczne obciążenia graniczne w układach walcowo-stożkowych

Autorzy:

Dinkler, D.
Knoke, O.

Powiązania:

https://bibliotekanauki.pl/articles/279836.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

stability
buckling
imperfection sensitivity
perturbation
plasticity

Opis:

The paper presents a procedure for computation of the limit loads of imperfection-sensitive shells including plastic deformations. On the basis of strain energy of shells, the worst case scenario for critical perturbations at fixed load levels is investigated. Limit loads of cylindrical and conical shells under combined actions are compared to European design rules. The concept is applied to more general buckling cases of combined shell structures.
W pracy przedstawiono metodę wyznaczania obciążeń granicznych dla powłok wrażliwych na niedoskonałości, z uwzględnieniem odkształceń plastycznych. Opierajac się na energii odksztalcenia powłok rozważono przypadek najgorszego scenariusza krytycznych perturbacji przy ustalonych poziomach obciążeń. Wartości obciążeń granicznych dla powłók cylindrycznych i stożkowych porównano z przyjętymi w Europie metodami projektowania. Koncepcja została zastosowana do analizy bardziej ogólnych przypadków utraty stateczności konstrukcji powłokowych.

Źródło:

Journal of Theoretical and Applied Mechanics; 2003, 41, 3; 443-457
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Concerning the Shock Sensitivities of Certain Plastic Bonded Explosives Based on Attractive Cyclic Nitramines

Autorzy:

Zeman, S.
Elbeih, A. E.
Hussein, A.
Elshenawy, T.
Pelikán, V.
Yan, Q-L.

Powiązania:

https://bibliotekanauki.pl/articles/358824.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

nitramines
gap test
PBX
sensitivity
performance

Opis:

Plastic bonded explosives (PBXs) based on ε-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (ε-HNIW), 1,3,5-trinitro-1,3,5-triazinane (RDX), β-1,3,5,7-tetranitro-1,3,5,7-tetrazocane (β-HMX) and cis-1,3,4,6-tetranitro-octahydroimidazo-[4,5-d]imidazole (BCHMX) were prepared using a hydroxyl-terminated polybutadiene as a binder (HTPB) and cured with hexamethylene di-isocyanate (HMDI). Recently published data for analogous PBXs with a polyisobutylene binder (i.e. a C4 matrix) are also included. All of these PBXs were tested using the Small Scale Water Gap Test according to STANAG 4490, the results of which are directly proportional to the impact and friction sensitivities of the PBXs studied. Reciprocal ratios between the shock sensitivity of these PBXs and their performance were found using the volume heat of explosion as a variable; a semi-logarithmic analogue, using a representative of the detonation pressure (product ρD2) as a variable, has shown an opposite trend for three of these PBXs. A semi-logarithmic relationship between the shock sensitivity of the PBXs and the impact sensitivity of their pure nitramine fillers has confirmed the higher shock reactivity of the C4 PBXs filled with both technical ε-HNIW and RS-ε-HNIW, while for the HTPB PBXs filled with technical grade ε-HNIW, the shock sensitivity found was as expected. The shape and size of the particles should not be a reason for the increased resistance to shock of HMX-C4.

Źródło:

Central European Journal of Energetic Materials; 2017, 14, 4; 775-787
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Autorzy:

Gobara, M.
Baraka, A.

Powiązania:

https://bibliotekanauki.pl/articles/412328.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

gamma radiation
degradation
sensitivity
tartrazine
dosimeter

Opis:

In this study, Tartrazine aqueous solution was investigated as a simple low-dose dosimeter in the range of 20-500 Gy for the high ionizing radiation, gamma ray. Gradual bleaching of Tartarzine solution was observed with dose by measuring the absorbance of Tartarzine-solutions at specified wavelength, λ_max = 428 nm. Tartrazine concentration (10^–4, 5 ×10^–4 and 10^–3 M) and solution-initial pH value (5, 7 and 9) were considered as factors affecting degree of bleaching. It was found that Tartarzine-solution color was diminished gradually with selected dose range due to breakdown of the azo bond. The rate of bleaching increases with the increase of solution-initial pH. Increase of Tartarzine-concentration causes widening of range to which solution is susceptible. The post-irradiated effect (24 hours) was found to cause more bleaching. The sensitivity of Tartrazine solution is not regular with the Tartarzine-concentration and regular with pH.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 14, 1; 106-117
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Diagnostic accuracy of sonoelastography in different diseases
Wartość diagnostyczna sonoelastografii w różnych jednostkach chorobowych

Autorzy:

Manzoor, Iqra
Bacha, Raham
Gilani, Syed Amir

Powiązania:

https://bibliotekanauki.pl/articles/1033265.pdf

Data publikacji:

2018

Wydawca:

Medical Communications

Tematy:

accuracy
different diseases
sensitivity
sonoelastography
specificity

Opis:

The objective of this study was to evaluate the diagnostic accuracy of sonoelastography in patients of primary and secondary health care settings. Google scholar, PubMed, Medline, Medscape, Wikipedia and NCBI were searched in October 2017 for all original studies and review articles to identify the relevant material. Two reviewers independently selected articles for evaluation of the diagnostic accuracy of sonoelastography in different diseases based on titles and abstracts retrieved by the literature search. The accuracy of sonoelastography in different diseases was used as the index text, while B-mode sonography, micro pure imaging, surgery and histological findings were used as reference texts. Superficial lymph nodes, neck nodules, malignancy in thyroid nodules, benign and malignant cervical lymph nodes, thyroid nodules, prostate carcinoma, benign and malignant breast abnormalities, liver diseases, parotid and salivary gland masses, pancreatic masses, musculoskeletal diseases and renal disorders were target conditions. The data extracted by the two reviewers concerning selected study characteristics and results were presented in tables and figures. In total, 46 studies were found for breast masses, lymph nodes, prostate carcinoma, liver diseases, salivary and parotid gland diseases, pancreatic masses, musculoskeletal diseases and renal diseases, and the overall sensitivity of sonoelastography in diagnosing all these diseases was 83.14% while specificity was 81.41%. This literature review demonstrates that sonoelastography is characterized by high sensitivity and specificity in diagnosing different disorders of the body.
Celem badania była ocena dokładności diagnostycznej sonoelastografii u chorych leczonych w warunkach placówek podstawowej i specjalistycznej opieki zdrowotnej. W październiku 2017 roku dokonano przeglądu baz danych Google Scholar, PubMed, MEDLINE, Medscape, Wikipedia oraz NCBI w celu pozyskania prac oryginalnych i poglądowych, które stanowiły materiał do badania. Prace wybierało dwóch badaczy niezależnie. Oceniono dokładność sonoelastografii w diagnostyce różnych chorób na podstawie tytułów i streszczeń wyszukanych prac. Główny termin stanowiła „skuteczność sonoelastografii w diagnostyce różnych chorób”, a terminy „ultrasonografia w trybie B-mode”, „obrazowanie MicroPure”, „zabieg operacyjny” i „wynik badania histopatologicznego” stosowano jako terminy referencyjne. Badane patologie dotyczyły: powierzchownych węzłów chłonnych, guzków okolicy szyi, złośliwych guzów tarczycy, łagodnych i złośliwych zmian w węzłach chłonnych szyjnych, guzków tarczycy, raka gruczołu krokowego, łagodnych i złośliwych zmian w piersiach, chorób wątroby, zmian w śliniankach przyusznych i gruczołach ślinowych, zmian w trzustce, chorób układu mięśniowo-szkieletowego oraz chorób nerek. Pozyskane przez dwóch badaczy dane dotyczące charakterystyki ocenianych prac oraz wyniki analizy przedstawiają tabele i ryciny. W sumie wyszukano 46 badań dotyczących zmian w piersiach, węzłów chłonnych, raka gruczołu krokowego, chorób wątroby, chorób gruczołów ślinowych i ślinianek przyusznych, zmian w trzustce, chorób układu mięśniowo-szkieletowego i chorób nerek, a ogólna czułość i swoistość sonoelastografii w diagnostyce tych chorób wynosiły odpowiednio 83,14% i 81,41%. Niniejszy przegląd literatury wskazuje na wysoką czułość i swoistość sonoelastografii w diagnostyce różnych chorób. Artykuł w wersji polskojęzycznej jest dostępny na stronie http://jultrason.pl/index.php/issues/volume-18-no-72

Źródło:

Journal of Ultrasonography; 2018, 18, 72; 29-36
2451-070X

Pojawia się w:

Journal of Ultrasonography

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Ego Depletion Sensitivity as the Mediator Between Avoidance Temperaments and Subjective Vitality

Autorzy:

Adil, Adnan
Kanwal, Asmara
Yasin, Ghulam
Ameer, Sadaf

Powiązania:

https://bibliotekanauki.pl/articles/2129975.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Ego depletion sensitivity
temperament
subjective vitality

Opis:

The present study examined the mediating role of ego depletion sensitivity between temperaments and subjective vitality. The sample of the present research consisted of 210 undergraduate students of the University of Sargodha. Temperament, ego depletion sensitivity, and subjective vitality were operationalized through Approach-Avoidance Temperament Questionnaire (Elliot & Thrash, 2010), Depletion Sensitivity Scale (Salmon et al., 2014), and Subjective Vitality Scale (Ryan & Frederick, 1997), respectively. Correlation analysis depicted that ego depletion sensitivity was positively correlated with avoidance temperament and negatively correlated with subjective vitality. Furthermore, ego depletion sensitivity mediated between avoidance temperament and subjective vitality. Implications of the study along with its limitations and suggestions were discussed.

Źródło:

Polish Psychological Bulletin; 2021, 52, 2; 188-196
0079-2993

Pojawia się w:

Polish Psychological Bulletin

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Literatura macedońska dla dzieci (rekonesans badawczy)
Macedonian Children’s Literature (Preliminary Thoughts)

Autorzy:

Mojsowa‑Czepiszewska, Wesna

Powiązania:

https://bibliotekanauki.pl/articles/784467.pdf

Data publikacji:

2019

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

Macedonian literature for children
sensitivity
maturation

Opis:

This short study embraces both the first sprouts of the written Macedonian literature for children (somewhere around the second part of the 19th century), and the literary production which happens after the establishment of the contemporary Macedonian language, that is, after the 1945. Still, the main accent is on two newer books: Verses also Grow (И строфите растат) by Alexandar Kujundziski and Jump and Skip (Скокни прескокни) by Vasil Mukaetov which is a part of the refreshed reading list as an optional book for the Macedonian language lessons in the primary schools in Macedonia. Both authors put an emphasis exactly on a child’s sensitivity and such issues as character growth and maturation. In their books, they transfer the reader from childhood to adulthood unnoticeably and lightly. Their message is to help the little human in the complex process of his or her own comprehension and to show him or her that he or she are not alone in this process.

Źródło:

Paidia i Literatura; 2019, 1; 101-115
2719-4167

Pojawia się w:

Paidia i Literatura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Македонската литература за деца (мала студија за запознавање)
Macedonian Children’s Literature (Preliminary Thoughts)

Autorzy:

Мојсова‑Чепишевска, Весна

Powiązania:

https://bibliotekanauki.pl/articles/942572.pdf

Data publikacji:

2019

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

Macedonian literature for children
sensitivity
maturation

Opis:

This short study embraces both the first sprouts of the written Macedonian literature for children (somewhere around the second part of the 19th century), and the literary production which happens after the establishment of the contemporary Macedonian language, that is, after the 1945. Still, the main accent is on two newer books: Verses also Grow (И строфите растат) by Alexandar Kujundziski and Jump and Skip (Скокни прескокни) by Vasil Mukaetov which is a part of the refreshed reading list as an optional book for the Macedonian language lessons in the primary schools in Macedonia. Both authors put an emphasis exactly on a child’s sensitivity and such issues as character growth and maturation. In their books, they transfer the reader from childhood to adulthood unnoticeably and lightly. Their message is to help the little human in the complex process of his or her own comprehension and to show him or her that he or she are not alone in this process.

Źródło:

Paidia i Literatura; 2019, 1; 83-99
2719-4167

Pojawia się w:

Paidia i Literatura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

A statistical criterion to establish normal ranges for age in a contrast sensitivity function test

Autorzy:

Santillán, J E
Issolio, L A
Colombo, E M

Powiązania:

https://bibliotekanauki.pl/articles/173959.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

contrast sensitivity
ophthalmological clinic
normality references

Opis:

In a previous work (Opt. Appl. 39(2), 2009, pp. 415–428) we established the characteristics that a computer-based contrast sensitivity function (CSF) measurement system has to be used in the opthalmological clinic. In order to obtain a generalized use of CSF in clinics and as a screening tool, the necessity to incorporate a normality range by age was also suggested. It will also be important to establish how many reference curves are necessary, because in the last decades, different ranges have been presented in the literature. In the present work, our purpose was to show how to distribute the observers in terms of the statistical variations of CSF as a function of age in a normal population of healthy eyes. We then evaluated the utility of these curves in the detection of vision problems and, finally, the possibility of using them as a screening tool considering a reduced number of spatial frequencies. We used a computer-based CSF measurement system to present sinusoidal gratings whose values range from 1 to 24 cycles per degree. Three different groups (control, clinical and non-clinical) of subjects were considered. From the statistical analysis we obtained two ranges of normality, based on significant differences that appear around the age of 50. As we were interested in evaluating if this separation could increase the sensitivity of the test, we also performed a series of measurements in a clinical environment. As an interesting possibility of usage of a vision test is screening, we also measured people in conditions relatively different to those found in laboratories or clinics. We observed that this division into two ranges allows a better discrimination, especially for young adults. Measurements show an improvement of 22% in the detection of vision anomalies.

Źródło:

Optica Applicata; 2014, 44, 2; 213-225
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Measurement of sensitivity of solar blind UV cameras to solar light

Autorzy:

Chrzanowski, Krzysztof
Stafiej, B.

Powiązania:

https://bibliotekanauki.pl/articles/1818215.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

solar sensitivity
SBUV cameras
solar blind UV cameras
UV cameras sensitivity
corona discharge detection

Opis:

Solar blind UV cameras are not theoretically supposed to be sensitive to solar light. However, there is practically always some sensitivity to solar light. This limited solar sensitivity can sometimes make it impossible to detect the weak emission of a corona target located on the solar background. Therefore, solar sensitivity is one of the crucial performance parameters of solar blind UV cameras. However, despite its importance, the problem of determining solar sensitivity of solar blind UV cameras has not been analysed and solved in the specialized literature, so far. This paper presents the concept (definition, measurement method, test equipment, interpretation of results) of measuring solar sensitivity of solar blind UV cameras.

Źródło:

Opto-Electronics Review; 2021, 29, 2; 45--58
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Measurement of sensitivity of solar blind UV cameras to solar light

Autorzy:

Chrzanowski, Krzysztof
Stafiej, B.

Powiązania:

https://bibliotekanauki.pl/articles/1818218.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

solar sensitivity
SBUV cameras
solar blind UV cameras
UV cameras sensitivity
corona discharge detection

Opis:

Solar blind UV cameras are not theoretically supposed to be sensitive to solar light. However, there is practically always some sensitivity to solar light. This limited solar sensitivity can sometimes make it impossible to detect the weak emission of a corona target located on the solar background. Therefore, solar sensitivity is one of the crucial performance parameters of solar blind UV cameras. However, despite its importance, the problem of determining solar sensitivity of solar blind UV cameras has not been analysed and solved in the specialized literature, so far. This paper presents the concept (definition, measurement method, test equipment, interpretation of results) of measuring solar sensitivity of solar blind UV cameras.

Źródło:

Opto-Electronics Review; 2021, 29, 2; 45--58
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Measurement of sensitivity of solar blind UV cameras to solar light

Autorzy:

Chrzanowski, Krzysztof
Stafiej, B. Stafiej

Powiązania:

https://bibliotekanauki.pl/articles/1818220.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

solar sensitivity
SBUV cameras
solar blind UV cameras
UV cameras sensitivity
corona discharge detection

Opis:

Solar blind UV cameras are not theoretically supposed to be sensitive to solar light. However, there is practically always some sensitivity to solar light. This limited solar sensitivity can sometimes make it impossible to detect the weak emission of a corona target located on the solar background. Therefore, solar sensitivity is one of the crucial performance parameters of solar blind UV cameras. However, despite its importance, the problem of determining solar sensitivity of solar blind UV cameras has not been analysed and solved in the specialized literature, so far. This paper presents the concept (definition, measurement method, test equipment, interpretation of results) of measuring solar sensitivity of solar blind UV cameras.

Źródło:

Opto-Electronics Review; 2021, 29, 2; 45--58
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Ukrainian adaptation of Chen and Starosta’s Intercultural Sensitivity Scale

Autorzy:

Wosik-Kawala, Danuta
Sarzyńska-Mazurek, Ewa
Korczyński, Mariusz
Bevz, Halyna

Powiązania:

https://bibliotekanauki.pl/articles/52915098.pdf

Data publikacji:

2024-12-31

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

intercultural sensitivity
Intercultural Sensitivity Scale
research instrument adaptation
confirmatory factor analysis
exploratory factor analysis

Opis:

The situation in Ukraine caused by war since 2014 and the intensification of hostilities from 2022 have led many Ukrainian citizens to emigrate. Living in other countries requires the need to adapt to often different cultural conditions. Intercultural sensitivity is an important dimension of intercultural communication competence that determines if individuals effectively adjust to a new reality. This study aims to adapt the most widely used tool for measuring intercultural sensitivity, the Intercultural Sensitivity Scale (2000) by Chen and Starosta, to Ukrainian conditions. This article comprises a presentation of a Ukrainian version of the questionnaire for measuring cross-cultural sensitivity, along with its psychometric properties. The obtained results showed that Chen and Starosta’s five-factor model of intercultural sensitivity (IS) did not fit the Ukrainian cultural context. A confirmatory factor analysis of the previous adaptations of IS, showed that the best model for the present study was the Serbian model. Therefore, we created a four-factor IS model containing 15 items (α-Cronbach’s 0.841). These factors, along with the items included in the Ukrainian version of the Intercultural Sensitivity Scale, were based on the 24-item Intercultural Sensitivity Scale (ISS) formulated by Chen and Starosta. This study contains a proposal of an alternative model of the Intercultural Sensitivity Scale that is better suited to Ukrainian culture. The questionnaire with a key is attached to the article for other researchers to use in their studies.

Źródło:

Edukacja Międzykulturowa; 2024, 27, 4; 114-126
2299-4106

Pojawia się w:

Edukacja Międzykulturowa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Sensitivity enhancement of metamaterial-based surface plasmon resonance biosensor for near infrared

Autorzy:

Pal, S.
Prajapati, Y. K.
Saini, J. P.
Singh, V.

Powiązania:

https://bibliotekanauki.pl/articles/173477.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

metamaterials
sensor sensitivity
reflectance
evanescent field

Opis:

The present study investigates the angular response and sensitivity of a surface plasmon resonance biosensor with metamaterial, by taking the advantage of the remarkable property of metamaterials. The proposed biosensor numerically shows that silver with a metamaterial layer enhances the sensitivity. The thickness of metamaterial and silver layer has been optimized. On comparing these results with a conventional surface plasmon resonance biosensor, it is observed that the sensitivity of the proposed biosensor is improved by introducing the metamaterial. The proposed biosensor has a sensitivity 6.3124 times higher than that of the conventional surface plasmon resonance sensor.

Źródło:

Optica Applicata; 2016, 46, 1; 131-143
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

A remark on sensitivity in linear programming and Gale-Samuelson nonsubstitution theorem

Autorzy:

De Giuli, M. E.
Giorgi, G.

Powiązania:

https://bibliotekanauki.pl/articles/969906.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

linear programming
sensitivity analysis
nonsubstitution theorem

Opis:

The main purpose of this paper is to show that David Gale's result (1960, Lemma 9.3 on sensitivity in linear programming) is not generally valid. In this lemma, additional assumptions, that are instead required, are not made. We give some correct versions of the above mentioned lemma, and with these an elementary proof of the Gale-Samuelson nonsubstitution theorem.

Źródło:

Control and Cybernetics; 2010, 39, 3; 827-838
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Reliability study of a containment shell
Analiza niezawodności osłony budynku reaktora

Autorzy:

Postek, E.
Siemaszko, A.
Kleiber, M.

Powiązania:

https://bibliotekanauki.pl/articles/281404.pdf

Data publikacji:

2002

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

nuclear engineering
reliability
design sensitivity
FEM

Opis:

Computational time needed for reliability analysis of realistic structural problems as a rule is very high. Improvements in efficiency are critical to allow solution of large realistic problems. The reliability analysis is usually performed using approximate First Order Reliability Method (FORM). Iterative solution procedures of FORM require extensive design sensitivity computations of high accuracy. The design of realistic structures requires computer-based numerical procedures, such as finite e,ement analysis. The design sensitivity gradients are not explicitly available in terms of design variables. The most intensive computational task of design sensitivity computation should be carried out by highly efficient and accurate methods such as discrete design sensitivity analysis. This paper describes requirements for design sensitivity information for reliability analysis. The way of coupling reliability computation with discrete AVM and DDM methods of design sensitivity analysis is pointed out. A computational program developed for layered concrete shells allows one to solve large realistic reliability problems. The reliability study of an RC nuclear containment shell is carried out. Reliability studies show which of the parameters have the highest impact on the reliability of the vessel.
Analiza niezawodności dużych konstrukcji wymaga zazwyczaj bardzo długich obliczeń komputerowych. Poprawa efektywności algorytmów jest zazwyczaj warunkiem koniecznym uzyskania rozwiązań dla dużych rzeczywistych problemów. Analizę niezawodności zwykle przeprowadza się stosując przybliżoną metodę analizy niezawodności pierwszego rzędu (FORM). Procedury iteracyjne analizy niezawodności pierwszego rzędu (FORM) wymagają obliczenia gradientów wrażliwości o wysokiej dokładności. Projektowanie konstrukcji wymaga stosowania metod numerycznych takich jak metoda elementów skończonych. Gradienty wrażliwości nie są jawnie zależne od zmiennych projektowych. Obliczenia gradientów wrażliwości powinno być realizowane przy zastosowaniu efektywnych, dyskretnych metod analizy wrażliwości. W artykule przedstawiono sposób połączenia analizy niezawodności z dyskretnymi metodami obliczania gradientów wrażliwości - zmiennej sprzężonej (AVM) i różniczkowania bezpośredniego (DDM). Rozwinięty program komputerowy dla żelbetowych powłok warstwowych pozwala na rozwiązywanie dużych zadań niezawodnościowych. Przedstawiona została analiza niezawodności żelbetowego budynku bezpieczeństwa reaktora nuklearnego. Analiza niezawodności pozwala na stwierdzenie, który z parametrów projektowych ma największy wpływ na niezawodność osłony.

Źródło:

Journal of Theoretical and Applied Mechanics; 2002, 40, 1; 179-203
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Probit Analysis - a Promising Tool for Evaluation of Explosives Sensitivity

Autorzy:

Šelešovský, J.
Pachmáň, J.

Powiązania:

https://bibliotekanauki.pl/articles/357996.pdf

Data publikacji:

2010

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

probit analysis
sensitivity
sensitiveness
friction
impact

Opis:

The sensitivity of explosives to various initiating events, in probability of initiation-level of stimulus space, has a shape of sigmoidal curve. In standard sensitivity tests only one point on this curve is sought, most often the 50% initiation probability level. The usual (and most often used) method for its determination is the up-and-down method. The whole sensitivity curve can be obtained by conducting large number of trials at all levels or more effectively by probit analysis. The usage of probit analysis, improvement of the precision of the results and comparison with the results precision of the up-and-down method is demonstrated by the example of determination of sensitivity to friction.

Źródło:

Central European Journal of Energetic Materials; 2010, 7, 3; 269-278
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Effect of Different Polymeric Matrices on the Sensitivity and Performance of Interesting Cyclic Nitramines

Autorzy:

Elbeih, A.
Zeman, S.
Jungova, M.
Akstein, Z.

Powiązania:

https://bibliotekanauki.pl/articles/358359.pdf

Data publikacji:

2012

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

HNIW
BCHMX
RDX
HMX
sensitivity
performance

Opis:

Different polymeric matrices, based on butadiene-styrene rubber, polymethyl-methacrylate and silicone binders, were investigated for their ability to decrease the sensitivity of explosives to different mechanical stimuli. A series of plastic explosives based on four different nitramines, namely RDX (1,3,5-trinitro- 1,3,5-triazacyclohexane), β-HMX (β-1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane), BCHMX (bicycloHMX, cis-1,3,4,6-tetranitro-octahydroimidazo-[4,5- d ]imidazole) and ε -HNIW (ε -2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane, ε-CL-20), bonded by the selected polymeric matrices were prepared. Sensitivity to impact of all of the plastic explosives prepared as well as of the pure explosives, was measured using the fall hammer test. Sensitivity to friction was determined using the BAM friction test. The performance was studied using the ballistic mortar test and the results were recorded relative to TNT (trinitrotoluene) as reference. By comparing the results of impact and friction sensitivities, it is obvious that the mechanism of transfer of the friction force to the reaction center of the nitramine molecule should be different from that of impact energy transfer. The silicone binder appeared to be the best polymer for decreasing the sensitivity of explosives. The results of the ballistic mortar proved that the performance of the plastic explosives prepared is affected by the type and weight percentage of the binder in each sample.

Źródło:

Central European Journal of Energetic Materials; 2012, 9, 2; 131-138
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Control system defined by some integral operator

Autorzy:

Majewski, M.

Powiązania:

https://bibliotekanauki.pl/articles/255698.pdf

Data publikacji:

2017

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Volterra equation
implicit function theorem
sensitivity

Opis:

In the paper we consider a nonlinear control system governed by the Volterra integral operator. Using a version of the global implicit function theorem we prove that the control system under consideration is well-posed and robust, i.e. for any admissible control u there exists a uniquely defined trajectory xu which continuously depends on control u and the operator [formula] is continuously differentiable. The novelty of this paper is, among others, the application of the Bielecki norm in the space of solutions which allows us to weaken standard assumptions.

Źródło:

Opuscula Mathematica; 2017, 37, 2; 313-325
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Sensitivity Analysis and Optimization for Selected Supply Chain Management Issues in the Company – Using System Dynamics and Vensim

Autorzy:

Kasperska, Elżbieta
Mateja-Losa, Elwira
Marjasz, Rafał

Powiązania:

https://bibliotekanauki.pl/articles/475034.pdf

Data publikacji:

2013

Wydawca:

Fundacja Upowszechniająca Wiedzę i Naukę Cognitione

Tematy:

System Dynamics
sensitivity analysis
optimization
Vensim

Opis:

The aim of our paper is to present the new results of research work on optimization and simulation for some logistic problems in the company. The System Dynamics (SD) method and the Vensim simulation language are applied in order to solve specific managerial problems described by Forrester in the model of supply chain. The historical model of Customer-Producer-Employment System by Forrester (Forrester, 1961) has not been examined with the sensitivity analysis, from the “automatic” testing perspective. Optimization experiments have not been conducted, either. It is surprising, since the model is old and widely known. The opportunities offered by the Vensim language allow us to perform such analysis. The visualization called “confidence bounds“ is used, to show the behaviour of chosen variables over a period of time. The Monte-Carlo method is applied for sampling a set of numbers from within bounded domains (distribution for each searching parameters is specified). The authors of this paper conducted numerous experiments in this scope. This paper presents their results and offers some conclusions formulated at the end.

Źródło:

Journal of Entrepreneurship, Management and Innovation; 2013, 9, 2; 29-44
2299-7075
2299-7326

Pojawia się w:

Journal of Entrepreneurship, Management and Innovation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Constructing improvement plan for inputs through dialogue with DM about DEA-Efficiency for DMUs

Autorzy:

Uemura, Y.

Powiązania:

https://bibliotekanauki.pl/articles/206812.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

evaluation efficiency
partial improvement plan
sensitivity analysis

Opis:

Evaluation of efficiency of the DMUs (Decision Making Units) in a company is a very important problem. Thus, the studies of evaluation of efficiency are being actively carried out on the basis of the production functions, for example Cobb-Douglas production function and fuzzy loglinear production function (fuzzy Cobb-Douglas model). Recently, DEA (Data Envelopment Analysis) was applied to evaluation of efficiency, in the sense of benchmarking evaluation. After having evaluated DMUs by DEA, we obtain the improvement plan for every input in the inefficient DMUs. Though we many not be able to decrease inputs at one time according to the DEA plan, it is natural to construct some phased improvement plans for decreasing the inputs. First, we propose to support the construction of some phased improvement plans by the sensitivity analysis for the evaluated efficiency by applicatiion of definite limits to the decrease of inputs. Second, we evaluate this method by applying it to the case of bank data.

Źródło:

Control and Cybernetics; 1999, 28, 1; 133-139
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

The importance of the nuclear and cytoplasmic signalling in the cellular response to ionizing radiation

Autorzy:

Szumiel, I.

Powiązania:

https://bibliotekanauki.pl/articles/146716.pdf

Data publikacji:

2000

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

cellular signalling pathways
ionizing radiation
radiation sensitivity

Opis:

DNA is the universal primary target for ionizing radiation; however, the cellular response is highly diversified not only by differential DNA repair ability. The monitoring system for the ionizing radiation-inflicted DNA damage consists of 3 apparently independently acting enzymes which are activated by DNA breaks: two protein kinases, Atm (ataxia telangiectasia mutated) and DNA-PK (DNA-dependent protein kinase) and a poly(ADP-ribose) polymerase, PARP-1. These 3 enzymes are the source of alarm signals, which affect to various extents DNA repair, progression through the cell cycle and eventually the pathway to cell death. Their functions probably are partly over-lapping. On the side of DNA repair their role consists in recruiting and/or activating the repair enzymes, as well as preventing illegitimate recombination of the damaged sites. A large part of the nuclear signalling pathway, including the integrating role of Tp53 has been revealed. Two main signalling pathways start at the plasma membrane: the MAPK/ERK (mitogen and extracellular signal regulated protein kinase family) "survival pathway" and the SAPK/JNK (stress-activated protein kinase/c-Jun N-terminal kinase) "cell death pathway". The balance between them is likely to determine the cell’s fate. When DNA break rejoining is impaired, the cell is unconditionally radiation sensitive. The fate of a repair-competent cell is determined by the time factor: the cell cycle arrest should be long enough to ensure the completion of repair. Incomplete repair or misrepair may be tolerated, when generation of the death signal is prevented. So, the character and timing of the signals are, to a large part, responsible for the cellular intrinsic radiation sensitivity and depend on the characteristics of the cellular signalling web.

Źródło:

Nukleonika; 2000, 45, 4; 215-220
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Sensitivity analysis of biological tissue freezing process with respect to the radius of spherical cryoprobe
Analiza wrażliwości procesu zamrażania tkanki biologicznej ze względu na promień kriosondy sferycznej

Autorzy:

Majchrzak, E.
Kałuża, G.

Powiązania:

https://bibliotekanauki.pl/articles/280301.pdf

Data publikacji:

2006

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

freezing process
boundary element method
sensitivity analysis

Opis:

Application of the shape sensitivity analysis to the case of problems of the biological tissue freezing process is discussed. The freezing process described by a strongly non-linear bioheat transfer equation in which an additional term controlling the evolution of latent heat appears. Using the approach called 'the one domain method', one finally obtains a partial differential equation containing the substitute thermal capacity of tissue. The boundary and initial conditions determine the thermal interaction between the tissue and cryoprobe tip. In the paper, we consider a spherical internal cryoprobe. In order to estimate the influence of cryoprobe geometry on the course of the process, the shape sensitivity analysis is applied. In particular, a direct approach is used (explicit differentiation method). The results of numerical modeling (the boundary element method is applied) allow one to formulate essential practical conclusions concerning the course of cryosurgery treatments.
Praca dotyczy zastosowania analizy wrażliwości kształtu w zagadnieniach modelowaniaprocesuzamrażania tkanki biologicznej. Proces ten jest opisany silnie nieliniowym równaniem przepływu biociepła, w którym pojawia się dodatkowy składnik związany z wydzielaniem się utajonego ciepła zamrażania. Formalne przekształcenia wyjściowego równania opisującego proces prowadzi do równania różniczkowego, w którym występuje zastępcza pojemność cieplna tkanki (tzw. metoda jednego obszaru). Odpowiednio przyjęte warunki brzegowe determinują oddziaływania termiczne między tkanką a końcówką kriosondy. W pracy rozważa się sferyczną kriosondę wewnętrzną. VV celu oszacowania wpływu geometrii kriosondy na przebieg procesu zamrażania wykorzystano podejście bezpośrednie analizy wrażliwości kształtu. Wyniki obliczeii numerycznych otrzymane za pomocą metody elementów brzegowych pozwoliły na sformułowanie wniosków przydatnych w praktyce kriochirurgicznej.

Źródło:

Journal of Theoretical and Applied Mechanics; 2006, 44, 2; 381-392
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Time-independent stochastic design sensitivity analysis of structural systems with second-order accuracy

Autorzy:

Weber, H.

Powiązania:

https://bibliotekanauki.pl/articles/281017.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

design sensitivity
statics
random parameter
finite element

Opis:

In the paper, the static sensitivity of complex structures with respect to random design parameters is presented. Using the adjoint system method, based on the mean-point second-order perturbation method, the first two probabilistic moments of time-independent sensitivity are formulated with means and cross-covariances of random design parameters as the input data. It enables one to obtain the second-order accuracy of the solution. The presented formulations are illustrated by a number of numerical examples. The influence of finite element mesh density for the obtained results is discussed using the analysis of the spatial bar dome.

Źródło:

Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 783-794
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Path to ε-HNIW with Reduced Impact Sensitivity

Autorzy:

Elbeih, A.
Husarova, A.
Zeman, S.

Powiązania:

https://bibliotekanauki.pl/articles/358508.pdf

Data publikacji:

2011

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

HNIW
crystallization
thermal stability
impact sensitivity
SEM

Opis:

New purification method was applied to obtain epsilon HNIW (ε-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane, ε-HNIW) which has low impact sensitivity. The method is based on removing the impurities from a solution of alpha HNIW (ε-HNIW) by a chemical reaction to obtain pure epsilon form. For comparison, selected different published methods for recrystallization of HNIW to obtain the epsilon form were studied. All the selected methods are based on solvent-antisolvent technique. The optimum parameters, such as type of solvent and anti-solvent, volume ratio of solvent to anti-solvent, rate of addition, speed of stirring, etc., were applied to enhance the crystal size and shape of ε-HNIW. Checking the polymorphs of the obtained HNIW was done by Fourier transform infrared spectroscopy (FTIR). The thermal stability of the prepared samples was studied by using differential thermal analysis technique (DTA). Qualitative analysis of the crystal size and shape was done using scanning electron microscope (SEM) devise. Quantitative measurement of the crystals sizes for the studied samples was determined by Laser scattering particle size distribution analyzer. Impact sensitivity was measured by falling hammer test. The results indicate that all the applied methods of recrystallization give ε-HNIW. The impact sensitivity of HNIW decreases by obtaining small particles with regular shape. All the used published methods produce ε-HNIW with higher impact sensitivity than other nitramines. While the obtained crystals from the new method has regular smooth surface, with small particle size and its impact sensitivity is lower than RDX and HMX.

Źródło:

Central European Journal of Energetic Materials; 2011, 8, 3; 173-182
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Novel High-Nitrogen Content Energetic Compounds with High Detonation and Combustion Performance for use in Plastic Bonded Explosives (PBXs) and Composite Solid Propellants

Autorzy:

Keshavarz, M. H.
Abadi, Y. H.
Esmaeilpour, K.
Damiri, S.
Oftadeh, M.

Powiązania:

https://bibliotekanauki.pl/articles/358704.pdf

Data publikacji:

2018

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

tetrazoles derivatives
detonation performance
combustion performance
sensitivity

Opis:

Five novel high-nitrogen content (N>50%) derivatives of tetrazole are introduced in the study reported here. The assessment of various properties of these compounds were performed, which include physicothermal properties (crystal density, condensed phase heat of formation, melting point, enthalpy of fusion and entropy of fusion), detonation performance (velocity and pressure of detonation, detonation temperature and power), sensitivity with respect to external stimuli (impact, shock, friction and electric spark) and combustion performance (specific impulse). The predicted results of these compounds are compared with dihydroxylammonium 5,5’-bistetrazole-1,1’-diolate (TKX-50) and octanitro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) as a high performance ionic salt and a neutral explosive, respectively. The novel energetic compounds were found to have higher detonation and combustion performance than either TKX-50 or HMX. The new explosives are therefore good candidates to obtain high detonation and combustion performance in plastic bonded explosives (PBXs) and composite solid propellants, respectively.

Źródło:

Central European Journal of Energetic Materials; 2018, 15, 2; 364-375
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Considerations on Energy Deposition with the BAM-Fallhammer

Autorzy:

Von Oertzen, A.
Lehmann, T.

Powiązania:

https://bibliotekanauki.pl/articles/358904.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

explosives
impact sensitivity
BAM-Fallhammer
quality control

Opis:

The BAM-Fallhammer is a mechanical device to test the impact sensitivity of explosives and to determine a sensitiveness level. By its construction it transforms potential energy into kinetic energy of an impacting hammer, then hitting the sample. Ideally the entire potential energy is available at the moment of impact and the supporting base is infinitely rigid. By this study we want to quantify how much a real Fallhammer deviates from the ideal concept, and what the differences between different Fallhammers in different laboratories are. This information has never been collected in a consistent way. The aim of the authors is to develop guidance on the mechanical properties of the Fallhammer, which can be used for different purposes such as internal quality control, validation of the correct functioning of the Fallhammer, preparation of Round-Robin tests and similar. An established and verified mechanical status of a Fallhammer would greatly improve the quality and comparability of results and Round-Robin tests on the impact sensitivity of explosives.

Źródło:

Central European Journal of Energetic Materials; 2016, 13, 2; 273-288
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Empathic Sensitivity of Children with Special Educational Needs in Inclusive Learning Environment in Poland

Autorzy:

Barłóg, Krystyna

Powiązania:

https://bibliotekanauki.pl/articles/1969295.pdf

Data publikacji:

2018-09-30

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

empathic sensitivity
special educational needs
inclusive education

Opis:

Empathic sensitivity or empathy is the basis for human interactions and communication, proper interpersonal relationships. As a process and phenomenon, it is particularly important in education and social and emotional functioning. The research, which has already been conducted, was focused on the development of empathic sensitivity of children and young, able-bodied people. The reform of education in Poland implemented in 1989 enabled students with special educational needs to access education in mainstream schools. Preliminary studies in this field are an attempt to show the empathic sensitivity of children with special educational needs who are learning together with healthy, non-disabled friends – their peers in mass education, which is inclusive. The aim of this paper is to present the research outcomes concerning inclusive education in the Podkarpackie Province, Poland.

Źródło:

The New Educational Review; 2018, 53; 273-282
1732-6729

Pojawia się w:

The New Educational Review

Dostawca treści:

Biblioteka Nauki

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