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Tytuł:
Transformational leadership and emotional intelligence of graduate managers
Autorzy:
Jayawardena, L. N. A. C.
Powiązania:
https://bibliotekanauki.pl/articles/407399.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transformational leadership
emotional intelligence
Graduate Managers
Opis:
Leadership of graduate managers has become a focal point of many employers worldwide. Leadership development is in high demand and leadership initiatives are an effective tool for career development in the corporate environment. The objectives of the study were to assess the Transformational Leadership (TL) and Emotional Intelligence (EI) level of graduate managers, and to analyse the relationship between their EI and TL performances at work. The role of gender in leadership was examined. Sixty three graduate managers (33 men, and 30 women) who are following the masters' degree programme were randomly selected from a Sri Lankan university. The Multifactor Leadership Questionnaire of Bass and Avolio, was used to assess the leadership style performances of the respondents. Genos EI Inventory was used to measure their EI level. Descriptive and inferential analyses of data were conducted using SPSS software. Respondents recorded higher scores for TL performances at work. Respondents' EI levels and TL styles re?ected a difference with regard to their gender. Respondents have scored slightly lower scores for the EI sub-constructs in comparison to the normative figures of Genos EI. The higher fluctuation of Mean values of respondents indicated the volatility of the reasoning ability of respondents. The fact that graduate managers depicted higher scores for progressive leadership styles and lower scores for passive leadership styles augurs well for their career development. Emotional Intelligence of men significantly related with their Transformational leadership style. Study concludes that high Transformational leadership of Sri Lankan graduates managers and manageresses, and the relationship of Transformational Leadership with managers EI as well, could enhance management and production performances in corporate environments.
Źródło:
Management and Production Engineering Review; 2012, 3, 3; 28-33
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modelling of oil spill in New York Bay
Autorzy:
Toz, A. C.
Koseoglu, B.
Sakar, C.
Powiązania:
https://bibliotekanauki.pl/articles/205140.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
New York Bay
ADIOS
automated data inquiry for oil spills
GNOME
general NOAA operational modeling environment
numerical modelling
oil spill
Opis:
New York Bay is one of the most important transition regions of ships trading to east America. The region plays an important role in the commerce of the New York metropolitan area. The area is surrounded with the coasts that have various levels of environmental sensitivity. The area accommodates high diversity of native ecosystems and species that are rather vulnerable in case of oil spill. Thus getting well informed about the likelihood, or fate, of oil spills around this region is of great importance so that proactive measures can be taken. The purpose of this study is to investigate the oil spill and predict the future accidents likely to be encountered around the Bay of New York. Two trajectory models have been conducted for the study. ADIOS (Automated Data Inquiry for Oil Spills), has been conducted for natural degradation calculations, and, GNOME (General NOAA Operational Modeling Environment), has been conducted for surface spread simulation. The results gained through these efforts are hoped to be useful for many organizations dealing with oil spill response operations and contribute to an effective and efficient coordination among the relevant institutions.
Źródło:
Archives of Environmental Protection; 2016, 42, 4; 22-31
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of phenolic compounds in soils originating from two long-term fertilization experiments
Zawartość związków fenolowych w glebach pochodzących z dwóch trwałych doświadczeń nawozowych
Autorzy:
Sądej, W.
Żołnowski, A. C.
Marczuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/204662.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phenolic compounds
soil
long-term experiments
fertilization
FYM
slurry
związki fenolowe
gleba
eksperyment długoterminowy
nawożenie
obornik
nawóz mineralny
NPK
Opis:
The objective of the study was to compare the impact of three systems of multiannual fertilization applied in two long-term field experiments on the content of phenolic compounds in the soil. In the study, both natural (manure, slurry) and mineral (NPK) fertilizers were used, along with combined, organic-and-mineral fertilization. Experiment I was established in 1972 on grey brown podzolic soil; experiment II, in 1973 on brown soil. In both experiments crops were cultivated in a 7-year rotation, with a 75% share of cereals. The experimental samples were taken from the top layer of soil after 36 (experiment I) and 35 (experiment II) years following the establishment of the experiments. It was demonstrated that the presence of phenolic compounds in the soils was significantly dependent on the contents of organic C and total N, type of soil and the type and dose of used fertilizers. In grey brown podzolic soil, the content of total phenolic compounds was at a lower level than the content found in brown soil. Multiannual fertilization contributed to an increase in the content of total phenolic compounds in relation to the values obtained in control objects, which was particularly reflected in the soil originating from objects fertilized with slurry applied at a dose being equivalent to manure in terms of the amount of introduced organic carbon. The percentage of water-soluble phenols in the total content of these compounds in grey brown podzolic soil was at the level of 18.4%, while in brown soil it amounted to 29.1%.
Związki fenolowe to grupa substancji biologicznie aktywnych, pochodząca najczęściej z naturalnych przemian substancji organicznej bądź z biosyntezy prowadzonej przez mikroorganizmy. Istota działania tych związków w glebie polega na zaburzaniu przemian metabolicznych w roślinie, co powoduje zahamowanie ich wzrostu i obniżenie plonowania. Celem pracy było porównanie wpływu trzech systemów wieloletniego nawożenia stosowanego w dwóch trwałych doświadczeniach polowych na zawartość związków fenolowych w glebie. W badaniach stosowano nawozy naturalne (obornik, gnojowica), mineralne (NPK) oraz nawożenie łączne organiczno-mineralne. Doświadczenie I założono w 1972 r. na glebie płowej, natomiast doświadczenie II w 1973 r. na glebie brunatnej. W obu doświadczeniach rośliny uprawiano w 7-letnim zmianowaniu, z 75% udziałem zbóż. Materiał do badań stanowiły próbki pobrane z wierzchniej warstwy gleby po 36 (doświadczenie I) i 35 (doświadczenie II) latach od chwili założenia doświadczeń. Wykazano, że obecność związków fenolowych w glebach była istotnie uzależniona od zawartości C organicznego oraz N ogółem. Na ich zawartość istotny wpływ miał rodzaj gleby oraz rodzaj i dawka stosowanych nawozów. W glebie płowej średnia zawartość związków fenolowych ogółem kształtowała się na poziomie niższym w stosunku do zawartości stwierdzanych w glebie brunatnej. Wieloletnie nawożenie wpłynęło na wzrost zawartości związków fenolowych ogółem w stosunku do wartości uzyskanych w obiektach kontrolnych, co szczególnie uwidoczniło się w glebie pochodzącej z obiektów nawożonych gnojowicą, stosowaną w dawce równoważonej z obornikiem pod względem ilości wprowadzanego węgla organicznego. Udział form fenoli rozpuszczalnych w wodzie w ogólnej zawartości tych związków w glebie płowej kształtował się średnio na poziomie 18.4%, zaś w glebie brunatnej 29.1%.
Źródło:
Archives of Environmental Protection; 2016, 42, 4; 104-113
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical fault detection in rotating electrical machines using MCSA-FFT and MCSA-DWT techniques
Autorzy:
Bessous, N.
Sbaa, S.
Megherbi, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/200283.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
motor current signature analysis
MCSA
discrete wavelet transform
DWT
rolling element bearing faults
rotor eccentricity
stator current spectrum
dyskretna transformata falkowa
uszkodzenia łożysk tocznych
widmo prądu stojana
Opis:
This paper presents mechanical fault detection in squirrel cage induction motors (SCIMs) by means of two recent techniques. More precisely, we have analyzed the rolling element bearing (REB) faults in SCIM. Rolling element bearing faults constitute a major problem among different faults which cause catastrophic damage to rotating machinery. Thus early detection of REB faults in SCIMs is of crucial importance. Vibration analysis is among the key concepts for mechanical vibrations of rotating electrical machines. Today, there is massive competition between researchers in the diagnosis field. They all have as their aim to replace the vibration analysis technique. Among them, stator current analysis has become one of the most important subjects in the fault detection field. Motor current signature analysis (MCSA) has become popular for detection and localization of numerous faults. It is generally based on fast Fourier transform (FFT) of the stator current signal. We have detailed the analysis by means of MCSA-FFT, which is based on the stator current spectrum. Another goal in this work is the use of the discrete wavelet transform (DWT) technique in order to detect REB faults. In addition, a new indicator based on the MCSA-DWT technique has been developed in this study. This new indicator has the advantage of expressing itself in the quantity and quality form. The acquisition data are presented and a comparative study is carried out between these recent techniques in order to ensure a final decision. The proposed subject is examined experimentally using a 3 kW squirrel cage induction motor test bed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 571-582
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimum site selection for oil spill response center in the Marmara Sea using the AHP-TOPSIS method
Autorzy:
Koseoglu, B.
Buber, M.
Toz, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/205446.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oil spill
MCDM
multi-criteria decision-making
Marmara Sea
AHP-TOPSIS
Response Center
Opis:
The aim of this study is to determine the optimum location for an oil spill response center in the Marmara Sea. The analytic hierarchy process (AHP) and technique for the order of preference by similarity to ideal solution (TOPSIS) method as the most preferred multi-criteria decision-making (MCDM) technique were used. The results reveal that the LOC criterion and PRA sub-criterion have the highest effects on the optimal location selection of the oil spill response center. According to the results, the most suitable location for the oil spill response center in the region is Izmit Bay Entrance. This location has been proposed for the response headquarters to manage the whole operation with the assistance of auxiliary installations in the area. In this study, only technical and operational variables are taken into account, but political and administrative criteria are excluded.
Źródło:
Archives of Environmental Protection; 2018, 44, 4; 38-49
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of technology for obtaining water-soluble bacterial melanin and determination of some of pigment properties
Autorzy:
Aghajanyan, A.E.
Vardanyan, A.A.
Hovsepyan, A.C.
Hambardzumyan, A.A.
Filipenia, V.
Saghyan, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/80261.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
melanin
fermentation process
aeration
process optimization
sorption
dilution
pigment property
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 4
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Home Scrap on Mechanical Properties of MgAl9Zn1 Alloy Castings
Autorzy:
Konopka, Z.
Chojnacki, A. C.
Łągiewka, M.
Zyska, A.
Powiązania:
https://bibliotekanauki.pl/articles/382859.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
automation in foundry
robotics in foundry
environmental protection
mechanical properties
magnesium alloys
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
automatyzacja w odlewni
robotyka w odlewni
ochrona środowiska
właściwości mechaniczne
stopy magnezu
Opis:
The work presents the results of examinations concerning the influence of various amounts of home scrap additions on the properties of castings made of MgAl9Zn1 alloy. The fraction of home scrap in the metal charge ranged from 0 to 100%. Castings were pressure cast by means of the hot-chamber pressure die casting machine under the industrial conditions in one of the domestic foundries. The examinations consisted in the determination of the following properties: tensile strength Rm, yield strength Rp0.2, and the unit elongation A5, all being measured during the static tensile test. Also the hardness measurements were taken by the Brinell method. It was found that the mechanical properties (mainly the strength properties) are being improved up to the home scrap fraction of 50%. Their values were increased by about 30% over this range. Further rise in the home scrap content, however, brought a definite decrease in these properties. The unit elongation A5 exhibited continual decrease with an increase in the home scrap fraction in the metal charge. A large growth of hardness was noticed for the home scrap fraction increasing up to the value of 50%. Further increasing the home scrap percentage, however, did not result in a significant rise of the hardness value any more.
Źródło:
Archives of Foundry Engineering; 2017, 17, 2; 39-42
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrolysis of lactose from cheese whey using a reactor with [beta]-galactosidase enzyme immobilised on a commercial uf membrane
Autorzy:
Regenhardt, S.A.
Mammarella, E.J.
Rubiolo, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/184957.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
membrane bioreactor
immobilised enzyme
beta-galactosidas
lactose hydrolysis
bioreaktor membranowy
enzym unieruchomiony
beta-galaktozydazy
hydroliza laktozy
Opis:
In this study, [Beta]-galactosidase enzyme from Kluyveromyces fragilis was immobilised on a commercial polyethersulfone membrane surface, 10 kDa cut-off. An integrated process, concerning the simultaneous hydrolysis–ultrafiltration of whey lactose was studied and working conditions have been fixed at 55[degrees]C and pH 6.9, the same conditions that are used for the industrial process of protein concentration. For the immobilisation, best results were obtained using 5% (v/v) of glutaraldehyde solution and 0.03 M galactose; the total activity recovery coefficient (TARC) was 44.2%. The amount of immobilised enzyme was 12.49 mg with a total activity of 86.3 LAU at 37[degrees]C, using 5% (w/v) lactose solution in phosphate buffer (100 mM pH 6.9). The stability of the immobilised enzyme was approximately 585 fold higher in comparison with the stability of free enzyme. Multipoint covalent immobilisation improves the stability of the enzyme, thereby enhancing the decision to use the membrane as a filtering element and support for the enzyme immobilisation.
Źródło:
Chemical and Process Engineering; 2013, 34, 3; 375-385
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwe narzędzie badania możliwości. O rozrywkowych „grach wojennych” i pożytku, jaki mogą przynieść rozwojowi nauk historycznych
Autorzy:
a, Michał S t a c h u r
Powiązania:
https://bibliotekanauki.pl/articles/702001.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Historyka studia metodologiczne; 2013, 43
0073-277X
Pojawia się w:
Historyka studia metodologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impulsive Sound Detection Directly in Sigma-Delta Domain
Autorzy:
Miranda, I. D. dos S.
Lima, A. C. de C.
Powiązania:
https://bibliotekanauki.pl/articles/176966.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
impulsive signal detection
sigma-delta modulation
discrete cosine transform
Opis:
Recent implementations of Sigma-Delta (ΣΔ) converters have achieved low cost, low power consumption, and high integration while maintaining resolution as high as in Nyquist-rate converters. However, its usage implies demodulating the source signal delivered from ΣΔ modulation to Pulse-Code Modulation (PCM) on a pre-processing stage. This work proposes an algorithm based on Discrete Cosine Transform for impulsive signal detection to be applied directly on a modulated ΣΔ bitstream, targeting to reduce computational cost in acoustic event detection applications such as gunshot recognition systems. From pre-recorded impulsive sounds in ΣΔ format, it has been shown that the new method presents a similar error rate in comparison with traditional energy-based approaches in PCM, meanwhile, it reduces significantly the number of operations per unit time.
Źródło:
Archives of Acoustics; 2017, 42, 2; 255-261
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of probability density functions in modeling sample distribution of surface electromyographic (sEMG) signals
Autorzy:
Rosa, I. G.
Garcia, M. A. C.
Souza, M. N.
Powiązania:
https://bibliotekanauki.pl/articles/230062.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electromyography
EMG
surface EMG
sEMG
EMG onset detection
Opis:
The surface electromyography signal (sEMG) has been typically modeled as a Gaussian random process. However, some authors have reported that the probability density functions (pdfs) associated with the sample distribution of sEMG signal exhibits a more peaked shape than one could expected for a Gaussian pdf. This work aimed to reinvestigate the profile of the sEMG pdfs during five different load levels of isometric contractions of biceps brachii muscle, and compared the adequacy of four different pdfs (Gaussian, Logistic, Cauchy, and Laplacian) in describing the sample distribution of such signal. Experimental pdfs were estimated for each subject and load condition. The comparison between experimental pdfs obtained from sEMG data of forty volunteers and four theoretical pdfs was performed by fitting these functions to its experimental counterpart, and using a mean absolute errors in the assessment of the best fit. On average, the Logistic pdf seemed to be the best one to describe the sample distribution of sEMG signal, although the probabilistic results, considering binomial trials, were significant for both Gaussian and Logistic pdfs.
Źródło:
Archives of Control Sciences; 2013, 23, 4; 381-393
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correction of the refraction phenomenon in photogrammetric measurement systems
Autorzy:
Samper, D.
Santolaria, J.
Majarena, A. C.
Aguilar, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/221366.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
refraction correction
photogrammetry
correction polynomials
Opis:
This paper presents a method of correcting the effects caused by refraction phenomena in an optical measurement system. The correction algorithm proposed can be applied in many different photogrammetric applications affected by these effects. To validate this algorithm, a foot sole optical measurement system that uses several cameras to build a mesh of a foot sole has been used. This measurement system has six cameras that are protected by a safety glass that separates the cameras from the foot to be measured. The safety glass produces an air-glass-air interface that causes the refraction phenomena, producing deformations in the images. Due to the deformations it is impossible to obtain reliable metric information of the images captured using the measurement system. The developed correction algorithm is based on a grid layout and associated polynomials and makes it possible to correct the deformations and extract accurate metric information.
Źródło:
Metrology and Measurement Systems; 2013, 20, 4; 601-612
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eco-Friendly Soaking Process Using Tannic Acid as an Alternative Bactericide
Autorzy:
Zengin, A. C. A.
Çolak, S. M.
Zengin, G.
Kiliç, E.
Powiązania:
https://bibliotekanauki.pl/articles/204698.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bactericidal
leather industry
soaking
tannic acid
środek bakteriobójczy
przemysł skórzany
moczenie
tanina
Opis:
Eco-friendly leather processes based on the usage of natural products have become a potentially attractive issue for leather industry during the last few decades. Synthetic protective chemicals like bactericides used in most soaking process are known as hazardous substances and cause tannery effluents with high concentrations of Chemical Oxygen Demand (COD). In the present study, the effect of tannic acid on microorganisms, skin, wool and effluent were investigated in order to demonstrate the applicability of tannic acid in soaking process instead of commonly used bactericides. The bacterial load (cfu/ml), COD and Nitrogen Content (N) of the soaking effluents and Total Kjeldahl Nitrogen (TKN) content of skins and wools were investigated. Application of 0.5 and 1 wt% tannic acid concentrations was more effective than commercial bactericide, while comparable results were achieved by 0.1 and 0.3 wt% tannic acid. The application of tannic acid for soaking process resulted in lower COD and N values of effluents. The results show that tannic acid has the potential to be an alternative, eco-friendly bactericide for leather industry by reducing the pollution of leather soaking process.
Źródło:
Archives of Environmental Protection; 2014, 40, 1; 3-12
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The diagnostic importance of coagulation parameters in cattle having natural theileriosis
Autorzy:
Gunes, V.
Onmaz, A.C.
Keles, I.
Varol, K.
Ekinci, G.
Powiązania:
https://bibliotekanauki.pl/articles/31055.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The purpose of this study was to determine the diagnostic importance of coagulation parameters in cattle with natural theileriosis. Nine Holstein cross-breed cattle with theileriosis as infected group and 6 healthy Holstein cattle as control group were used in the present study. Mean fibrinogen level, thrombin time (TT), activated partial thromboplastin time (aPTT) and prothrombin time (PT) were not statistically different when control and infected groups compared, except for the D-dimer concentration. Quantitative D-dimer concentrations were determined by immune-turbidimetric assay. D-dimer values increased significantly (p<0.05) in infected group (631.55 ± 74.41 μg/L) compared to control group (370.00 ± 59.94 μg/L). D-dimer sensitivity and specificity were also determined at cut-off concentrations (372 μg/L). Sensitivity and specificity of D-dimer values were determined to be 88.89% and 83.33%, respectively. D-dimer is thought to be important indicator in the evaluation of the prognosis in theileriosis cases. Analysis of D-dimer values before and after treatment in controlled case studies were suggested in future studies to enlighten the issue.
Źródło:
Polish Journal of Veterinary Sciences; 2017, 20, 2
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł

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