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Wyszukujesz frazę "Amini, M." wg kryterium: Autor


Wyświetlanie 1-12 z 12
Tytuł:
The study of relationship between leaders behavior and efficiency and return on investment
Badanie związku między zachowaniem liderów i efektywnością i zwroty z inwestycji
Autorzy:
Shooshtarian, Z.
Amini, M.
Powiązania:
https://bibliotekanauki.pl/articles/404888.pdf
Data publikacji:
2012
Wydawca:
Politechnika Częstochowska
Tematy:
rozważanie
efektywność
inicjowanie struktury
zachowania przywódcze
consideration
efficiency
initiating structure
leadership behaviors
ROI
Opis:
The aim of study was: 1- To compare leaders' behavior in public with private sector industrial firms of Fars Province (one of the southern province of Iran). 2- To identify the relationship between the type of leaders' behavior and efficiency in these industries. 3- To identify the relationship between the type of leaders' behavior and ROI. LBDQ used in order to collect data. In order to analyze the data, SPSS software were used. From 602 completed questionnaire, 266 completed by public sectors' employees (%44) and 336 completed by private sectors' employees (%56). The results showed, "Initiating Structure" type of behavior is dominant behavior in both public and private sectors in Fars industries. There is a significant relationship between "Initiating Structure" type of leaders' behavior and efficiency in public and private sectors. Also a significant relationship between "Initiating Structure" type of behavior and ROI, was found in these two sectors. Regarding to "Consideration" type of behavior, there is a significant relationship between this type of behavior and efficiency in both sectors. There is no significant relationship between "Consideration" type of behavior and ROI in public and private sectors.
Celem pracy było: 1 - Porównanie zachowań przywódców w miejscach publicznych z sektora prywatnego firm przemysłowych na prowincji Fars (jeden z południowej prowincji Iranu). 2 - Określenie zależności pomiędzy rodzajem zachowania przywódców i wydajności w tych sektorach. 3 - Określenie zależności pomiędzy rodzajem zachowania przywódców i ROI. W celu zbierania danych wykorzystano LBDQ. W celu analizy danych było używane oprogramowanie SPSS. Uzyskano 602 wypełnionych kwestionariuszy, 266 kwestionariuszy wypełnionych przez pracowników sektora publicznego (44%) i 336 wypełnionych przez pracowników sektora prywatnego (56%). Wyniki wykazały że "Inicjowanie Struktury" jako rodzaju zachowania jest dominującym zachowaniem zarówno sektora publicznego jak i prywatnego w przemyśle prowincji Fars. Istnieje znaczący związek między "Inicjowaniem Struktury" jako typu zachowania przywódców i efektywności w sektorze publicznym, jak i prywatnym. Również znaczący związek występuje pomiędzy "Inicjowaniem Struktury" i ROI. W odniesieniu do "Rozważania" jako typu zachowania, istnieje znaczący związek pomiędzy tego rodzaju zachowaniem skuteczności w obydwu sektorach. Nie ma natomiast istotnego związku pomiędzy "Rozważaniem" i ROI w sektorach publicznym i prywatnym.
Źródło:
Polish Journal of Management Studies; 2012, 6; 55-67
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal site selection for heap leaching structures by the analytic hierarchy process (case study: Taft heap leaching structure, Iran)
Optymalny wybór lokalizacji struktur ługowania hałdy za pomocą analizy hierarchicznej (studium przypadku: hałda (składowisko) Taft, Iran)
Autorzy:
Soltani-Mohammadi, S.
Amini, M.
Powiązania:
https://bibliotekanauki.pl/articles/216766.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
wymywanie hałdy
kryterium oceny
optymalne miejsce
AHP
heap leaching
assessment criterion
optimum site
Opis:
Lokalizacja składowiska odpadów z procesów hydrometalurgicznych ma bardzo duży wpływ na koszty jego budowy i ryzyka związane ze środowiskiem. Wybór miejsc ługowania hałdy zależy od różnych parametrów technicznych (topograficznych, hydrologicznych, hydrogeologicznych i innych) oraz od uwarunkowań ekonomicznych i ekologicznych. W wielu przypadkach wybór optymalnych miejsc ługowania hałdy dokonywany jest z uwzględnieniem szeregu kryteriów za pomocą metod ELECTRE, TOPSIS i AHP. W artykule, w pierwszej kolejności określono kryteria do lokalizacji miejsc ługowania (o charakterze technicznym, finansowym i środowiskowym) i zbadano ich wpływ na wybór lokalizacji miejsc ługowania. Następnie korzystając z metody AHP problem decyzyjny rozpatrywano na trzech poziomach, wykorzystując oprogramowanie „Expert Choice”. W celu sprawdzenia metody wybrano hałdę w okolicy Taft, prowincji Yazd w Iranie. Analiza wrażliwości, która bada reakcję całego przedsięwzięcia została przeprowadzona dla głównych kryteriów technicznych, ekonomicznych i środowiskowych.
In hydrometallurgical projects, the heap location greatly affects construction costs and environmental hazards. Heap leach pad site selection depends on different technical parameters (topographical, borrow sources, hydrological, hydro-geological, etc.) and other financial and environmental factors. In many situations, there are some proposed sites with different parameters, and it is necessary that the optimum heap leach pad site be selected with the help of multi-criteria decision making methods such as ELECTRE, TOPSIS, and AHP. In this paper, we have first studied the heap leach pad site selection criteria (technical, financial, and environmental) and their effects on the selection of the location of the heap leaching structures. Then, using the AHP method, the decision making problem was hierarchically structured at three levels. For analysis, use was made of the “Expert Choice” software. To check the practicality of the method, an appropriate site for the construction of the leaching heap was selected at the Taft area, Yazd province, Iran. Finally, sensitivity analysis exploring the overall priority of alternatives to changes in the relative synthesis value of each criterion was carried out for the main technical, economic, and environmental criteria.
Źródło:
Gospodarka Surowcami Mineralnymi; 2013, 29, 1; 109-125
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic Study of the Thermal Decomposition of Potassium Chlorate Using the Non-isothermal TG/DSC Technique
Autorzy:
Ravanbod, M.
Pouretedal, H. R.
Amini, M. K.
Ebadpour, R.
Powiązania:
https://bibliotekanauki.pl/articles/358772.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
potassium chlorate
thermal decomposition
kinetic triplet
non-isothermal TG/DSC
Opis:
The non-isothermal TG/DSC technique has been used to study the kinetic triplet of the thermal decomposition of potassium chlorate at different heating rates (5, 10, 15 and 20 °C•min−1). The DSC results showed two consecutive broad exothermic peaks after melting. The first peak contains a shoulder indicating the presence of at least two processes. The overlapped peaks were resolved by a peak fitting procedure, and the three resolved peaks were used for evaluation of the kinetic triplet for each step. The TG results also showed two consecutive mass losses after melting. The kinetics of the mass loss processes were studied using resolved DTG peaks. The activation energies were calculated using the KAS model-free method. The pre-exponential factor and the best kinetic model for each step were determined by means of the compensation effect, and the selected models were confirmed by the nonlinear model fitting method. The average activation energies obtained from the DSC results were 237.3, 293.8, and 231.3 kJ•mol−1 for the three consecutive steps of thermal decomposition of KClO3. The activation energies were 231.0 and 239.9 kJ•mol−1 for the first and second mass loss steps. The Avrami-Erofeev of Ax/y with the function of g(α) = [−ln(1−α)]x/y (x/y = 5/4 and 3/2) was the most probable model for describing the reaction steps.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 2; 505-525
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accurate Prediction of the Condensed Phase (Solid or Liquid) Heat of Formation of Triazolium-based Energetic Ionic Salts at 298.15 K
Autorzy:
Jafari, M.
Davtalab, M.
Keshavarz, M. H.
Esmaeilpour, K.
Mosaviazar, A.
Ghasemi, M. A.
Amini, M.
Powiązania:
https://bibliotekanauki.pl/articles/358232.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
heat of formation
condensed phase
triazolium-based
energetic ionic salt
safety
Opis:
A novel method is introduced for the reliable prediction of the condensed phase (solid or liquid) heat of formation (Δf H θ (c)) of triazolium-based energetic ionic salts (EISs) at 298.15 K. It is based on the influence of some specific elemental compositions of cations and anions as additive parts. Two correcting functions, as non-additive quantities, are also used to adjust the first part. The coefficients of the specific elemental compositions of cations and anions in the new correlation, with a negative sign as well as a negative correcting function in the triazolium-based EISs, can decrease the value of Δf H θ (c) for the corresponding EISs. The reported Δf H θ (c) values of 57 different triazolium-based EISs were used to derive the new model. For 34 triazolium-based EISs, where the outputs of quantum mechanical methods were available, the Root Mean Squared Error (RMSE) of the new model was 156.0 kJ/mol. Meanwhile, the RMSE of complicated quantum mechanical methods is very large, i.e. 298.0 kJ/mol. The high reliability of the new model was also confirmed for a further 5 complex triazolium-based EISs as compared to the results of quantum mechanical calculations.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 3; 501-515
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and magnetic properties of amorphous Fe51Co12Si16B8Mo5P8 alloy
Autorzy:
Hasiak, M.
Miglierini, M.
Amini, N.
Bujdoš, M.
Powiązania:
https://bibliotekanauki.pl/articles/147218.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
microstructure
Mössbauer spectroscopy
magnetic properties
Curie point
Opis:
Microstructure and thermomagnetic characteristics of the amorphous Fe51Co12Si16B8Mo5P8 alloy in the as-quenched state and after 1 h of annealing at 573 K and 773 K are studied. The structural investigations performed by Mössbauer spectroscopy and X-ray diffractometry confirmed the amorphous structure of the analysed materials. An increase in the annealing temperature up to 773 K does not lead to crystallization of the amorphous alloy. Only structural rearrangement that causes changes in the topological short-range order and annealing out of free volume is observed. This behaviour was confi rmed by modifications of the shapes of hyperfi ne field distributions derived from the corresponding Mössbauer spectra of the investigated alloys. The Curie temperatures of the as-quenched and annealed Fe51Co12Si16B8Mo5P8 alloy at 573 and 773 K are 400, 405 and 421 K, respectively.
Źródło:
Nukleonika; 2017, 62, 2; 85-89
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Streptomyces spp. against Fusarium oxysporum f. sp. ciceris for the management of chickpea wilt
Autorzy:
Amini, J.
Agapoor, Z.
Ashengroph, M.
Powiązania:
https://bibliotekanauki.pl/articles/66412.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Streptomyces
Fusarium oxysporum f.sp.ciceris
management
chick-pea
wilt
biological control
Opis:
In this study, about 112 isolates of Streptomyces were isolated from chickpea rhizospheric soils. Among the isolated strains, five showed strong inhibitory effects against chickpea Fusarium wilt caused by Fusarium oxysporum f. sp. ciceris in vitro using plate assay and selected for further studies. The selected strains were identified as Streptomyces spp. based on morphological and biochemical characterization as well as 16S rDNA sequences analysis. Our results assigned them to strains related to genus of Streptomyces. In vitro, antagonistic effects of Streptomyces strains against the disease were evaluated through the dual-culture method, volatile and non-volatile metabolites, siderophore, protease and chitinase production. All bacterial strains inhibited mycelial growth of the pathogen ranging from 26 to 44.2% in dual culture assay. The non-volatile extract of five of the Streptomyces strains inhibited more than 50% growth of the pathogen, whereas volatile compounds were less effective on mycelial growth inhibition (20.2 to 33.4%). The ability of the biocontrol agents to produce siderophore and protease were varied, whereas, production of chitinase was detected for all strains. Results of the greenhouse assay indicated that all biocontrol agents reduced disease severity (ranging from 38.7 to 54.8%). Accordingly, strain KS62 showed higher control efficacy (54.8%). In addition, the biomass of chickpea plants (plant height and dry weight) significantly increased in plants treated with Streptomyces strains compared to non-bacterized control. The results of this study showed that it may be possible to manage chickpea Fusarium wilt disease effectively by using Streptomyces species, as biocontrol agents. Therefore, evaluating their efficiency under field conditions is needed.
Źródło:
Journal of Plant Protection Research; 2016, 56, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thickness Dependence of Mössbauer Parameters for Fe₇₈Si₉B₁₃ Metallic Glass Ribbons
Autorzy:
Amini, N.
Miglierini, M.
Hasiak, M.
Dekan, J.
Habibi, S.
Powiązania:
https://bibliotekanauki.pl/articles/1032172.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.75.-c
76.80.+y
Opis:
Changes in magnetic microstructure of Fe₇₈Si₉B₁₃ ribbons were investigated by the Mössbauer spectrometry as a function of their thickness. The latter decreases inversely with the quenching wheel velocity. Amorphicity of the samples was checked by X-ray diffraction and the Mössbauer spectrometry. Average values of hyperfine magnetic fields do not appreciably differ with the production velocity. On the other hand, notable deviations are observed in the position of a net magnetic moment. After annealing with moderate temperature, the magnetic anisotropy improves as indicated by an increase of the average value of hyperfine magnetic field. However, magnetic moments turn out of the ribbon plane and this process continues towards higher production velocity, i.e., smaller thickness of the ribbons. No appreciable deviations in the investigated Mössbauer parameters were revealed after annealing during different time intervals.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 666-668
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A low-jitter, full-differential PLL in 0.18μm CMOS technology
Autorzy:
Modarresi, F.
Ghasemzadeh, M.
Mazlumi, M.
Amini, A.
Abolfathi, T.
Powiązania:
https://bibliotekanauki.pl/articles/397765.pdf
Data publikacji:
2016
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
full differential PLL
PFD
VCO
low jitter
CPL
pętla synchronizacji fazy
PLL
generator sterowany napięciem
niski jitter
Opis:
This paper presents a Phase Locked Loop (PLL) which works with minimum jitter in the operation frequency range of 600MHZ to 900MHZ. Utilizing a full differential architecture that consists of several blocks of differential VCO, a differential PFD and a differential CPL leads to limiting the RMS jitter to 4.06ps, with 50mV power supply noise in the frequency range of 750MHz. Simulation results using 0.18μm CMOS TSMC standard technology demonstrate the power-consumption of 4.6mW at the supply voltage of 1.8V.
Źródło:
International Journal of Microelectronics and Computer Science; 2016, 7, 4; 119-122
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of hexavalent chromium from aqueous solution by adsorption on γ-alumina nanoparticles
Autorzy:
Golestanifar, H.
Haibati, B.
Amini, H.
Dehghani, M. H.
Asadi, A.
Powiązania:
https://bibliotekanauki.pl/articles/207945.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption
alumina
aluminum
chemicals removal
water treatment
chromium
chromium compounds
nanoparticles
sorption
alumina nanoparticles
hexavalent chromium
adsorpcja
aluminium
usuwanie chemikaliów
uzdatnianie wody
chrom
związki chromu
nanocząstki
sorpcja
nanocząstki tlenku glinu
chrom sześciowartościowy
Opis:
The use of γ-alumina (γ-Al2O3) nanoparticles as adsorbent to remove Cr(VI) from aqueous solution was investigated using batch experiments. Adsorption experiments were carried out for various initial doses of Al2O3, initial concentrations of chromium(VI), contact times and pH. The structure and morphology of the sorbent was characterized by XRD, SEM, and TEM techniques. Results demonstrated that the removal efficiency of chromium(VI) was increased by increasing the contact time, initial concentration, and pH. The results of the study showed that adsorption of chromium by γ-alumina nanoparticles reached equilibrium after 60 min and after that a little change of chromium removal efficiency was observed. Furthermore, kinetics of chromium sorption was well fitted by pseudo-second order kinetic model, and well explained by the Freundlich isotherm (R2 > 0.992). Overall, alumina nanoparticles recognized as an effective sorbent to remove chromium(VI) from aqueous solutions.
Źródło:
Environment Protection Engineering; 2015, 41, 2; 133-145
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature behaviour of hyperfine magnetic fields in a Fe-Co-Si-B-Mo-P metallic glass followed with ⁵⁷Fe Mössbauer spectrometry
Autorzy:
Cesnek, M.
Miglierini, M.
Kmječ, T.
Kohout, T.
Amini, N.
Janičkovič, D.
Matúš, P.
Powiązania:
https://bibliotekanauki.pl/articles/1053048.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.75.-c
76.80.+y
Opis:
Amorphous glass with nominal chemical composition Fe₅₁Co₁₂Si₁₆B₈Mo₅P₈ was studied by combination of the Mössbauer spectroscopy and magnetic measurements in order to characterize magnetic and structural features. Temperature evolution of the Mössbauer spectra revealed presence of broad distribution of hyperfine magnetic field at lower temperatures which vanishes with increase of temperature. The Curie temperature estimated from the Mössbauer spectroscopy experiments is T_{C} ≈ 392 K. This value is in a good agreement with that obtained by magnetic measurements (T_{C}=397 K). The Mössbauer spectroscopy spectra of the sample annealed at 823 K revealed a presence of crystalline components. This temperature is notably lower than the expected temperature of the onset of crystallization observed by differential scanning calorimetry ( ≈ 835 K).
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 744-746
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of some medicinal plants for their allelopathic potential against redroot pigweed (Amaranthus retroflexus)
Autorzy:
Nekonam, M.S.
Razmjoo, J.
Kraimmojeni, H.
Sharifnabi, B.
Amini, H.
Bahrami, F.
Powiązania:
https://bibliotekanauki.pl/articles/65955.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The study was conducted to determine the allelopathic effects of Crocus sativus L., Ricinus communis L., Nicotiana tabacum L., Datura inoxia Mill., Nerium oleander L., and Sorghum vulgare L. on the germination and growth of Amaranthus retroflexus (redroot pigweed). Powder and aqueous extracts of these plants were used to run the experiment under laboratory and greenhouse conditions. In the laboratory, all aqueous extracts showed a significant inhibitory effect on the germination, seedling length and weight of redroot pigweed plants. The most allelopathic against the redroot pigweed were R. communis, N. tabacum, and D. inoxia. In the greenhouse experiment, extracts and the powder of these plants also showed significant inhibitory effects on pigweed dry weight, height, leaf area, number of survivor plants, and amount of chlorophyll. In the germination bioassay and application of powder, the inhibitory effect was dosage dependent - the higher the concentration, the strongest the inhibitory effect. From the obtained results, it can be concluded that the powder and extracts of the tested species have an herbicidal potential against redroot pigweed and could be used as natural herbicides and mulches.
Źródło:
Journal of Plant Protection Research; 2014, 54, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Cadmium using Alkaline-Treated Activated Carbon from Leucaena Leucocephala Biomass
Autorzy:
Ibrahim, W. M. H. W.
Sulaiman, Nurul Syuhada
Amini, Mohd Hazim Mohammad
Kadir, W. R. A.
Mohamed, Mazlan
Ramle, Sitti Fatimah Mhd
Bilgin, Ugur
Rahman, Wan
Powiązania:
https://bibliotekanauki.pl/articles/2125550.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
activated carbon
cadmium
Leucaena leucocephala
adsorption
Opis:
Water contamination that caused by heavy metals is a very common phenomenon in the industrial age. One of the popular way to treat metal contaminated water is by adsorption process using activated carbon as the adsorbent. This paper works on producing activated carbon by chemical means with impregnation ratios of NaOH:char (w/w) was predetermined at 1:1 (ACT1-1), 2:1 (ACT2-1) and 3:1 (ACT3-1) under activation temperature of 700°C. Considering the Leucaena leucocephala is a wildly, easy and fast grown species, with the availability throught the year, it was chosen to be used as the precursor. The properties of these activated carbons and its potential for cadmium removal from aqueus solution was analyzed. It was found that the highest surface area was recorded at 662.76 m²/g. Four parameters were studied which are contact time, the effect of pH, initial concentration of adsorbate and temperature. The equilibrium time was achieved in 40 min treatment at initial concentrations of 30 mg/l. The adsorbent exhibited good sorption potential for cadmium at pH 8.0 and equilibrium temperature of 30℃. Based on the results, this study had proved that activated carbon from Leucaena leucocephala biomass have the good potential to be used for removal of cadmium from wastewater.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1033--1036
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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