Autor: Basak, S. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Modernizacja elektrycznego zespołu trakcyjnego serii EW60 (6WEb)
Modernisation of electric multiply units class EW60
Autorzy:: Basak, S.
Tematy:: transport kolejowy
transport szynowy
zespół trakcyjny
multiply unit
rail transport; Pokaż więcej
Wydawca:: Instytut Naukowo-Wydawniczy TTS
Powiązania:: https://bibliotekanauki.pl/articles/251071.pdf Link otwiera się w nowym oknie
Opis:: Elektryczne zespoły trakcyjne 6WE zaprojektowano w latach 80. XXw. w OBRPSz Poznań. Wykonano dwie jednosctki, których budowę ukończono w 1990 r. 11 lutego 1993r. przyjęto je na stan Lokomotywowni Gdynia Cisowa [1], a 17 listopada 1993r. rozpoczęto eksploatację jednostek w ruchu pasażerskim.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 2.

Tytuł:: Dielectric Permittivity and Viscoelastic Measurements οf Two Tricomponent Mixtures Consisting οf Laterally Fluorinated Terphenyl Derivatives
Autorzy:: Basak, S.
Dasgupta, P.
Das, B.
Das, M.
Dabrowski, R.
Tematy:: 61.30.-v
78.20.Fm
87.19.rd
87.19.rf
83.60.Bc; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1400143.pdf Link otwiera się w nowym oknie
Opis:: Two tricomponent room temperature nematic eutectic mixtures ABC and ABD with laterally fluorinated constituents A and B were prepared as base mixtures for vertically aligned mode LCD's. The physical properties of these mixtures viz. birefringence, dielectric anisotropy, bend elastic constant, relaxation time and rotational viscosities were determined in order to compare with the optimum values required to achieve the target specifications of VA mode materials. The dielectric anisotropy, Δ ε, and optical birefringence, Δ n, of these mixtures were found to be in the range of (-1.3 to -1.4) and (0.13 and 0.14), respectively, at around 20°C. The figure of merit for the ABD mixture has been found to be higher than that of ABC mixture throughout the entire temperature range. The pretilt angle effect in the physical parameters has also been studied. At T=20°C, the response time decreases to 25% and 35% for mixture ABC for 2° and 5° pretilt respectively in comparison to zero pretilt. On the other hand, at the same temperature for the ABD mixture these values are reduced by 16% and 35%, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Determination of Orientational Order Parameters of Two Tri-Component Mixtures from Optical Birefringence and X-Ray Diffraction Measurements
Autorzy:: Basak, S.
Dasgupta, P.
Das, B.
Das, M.
Dabrowski, R.
Tematy:: 61.05.cp
61.30.-v
42.70.Df; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1492775.pdf Link otwiera się w nowym oknie
Opis:: Two tri-component mixtures as base mixtures for vertically aligned mode LCD's were prepared. The eutectic compositions were theoretically estimated and experimentally verified from differential scanning calorimetry studies. A room temperature nematic mixture with fairly broad operating range emerged from each of the tri-component mixtures. The optical birefringence of these mixtures at the eutectic composition was measured as a function of temperature. X-ray diffraction measurements were done on these mixtures to obtain the orientational order parameters as a function of temperature. The order parameter values were also determined from birefringence measurements and the results were compared with mean field theory. Structural parameters like intermolecular distance and apparent molecular length have also been determined.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Flame Retardant and Antimicrobial Jute Textile Using Sodium Metasilicate Nonahydrate
Autorzy:: Basak, S.
Samanta, K. K.
Chattopadhyay, S. K.
Das, S.
Narkar, R.
Dsouza, C.
Shaikh, A. H.
Tematy:: flame retardant
sodium metasilicate nonahydrate
jute
LOI
antimicrobial; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/779514.pdf Link otwiera się w nowym oknie
Opis:: Flame retardant and antimicrobial functionalities were imparted in jute textile using sodium metasilicate nonahydrate (SMSN), commonly known as “water glass”. Sodium metasilicate nonahydrate (SMSN) was applied in jute fabric in different concentration by padding method followed by drying. Flame retardancy of the fabric was evaluated by Limiting Oxygen Index (LOI) and burning behaviour under vertical flammability tester including the char length. Burning rate was found to decrease by almost 10 times after an application of 2% SMSN compared to the control sample. Thermogravimetry (TG) and differential scanning calorimetry (DSC) analysis of both the control and treated jute fabrics were utilized to understand the mechanism of developed flame retardance in jute fabric. It was observed that the SMSN treated samples showed excellent antimicrobial property against both gram positive and gram negative bacteria. Antimicrobial properties of both the control and treated jute fabrics were also measured quantitatively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Flame resistant cellulosic substrate using banana pseudostem sap
Autorzy:: Basak, S.
Samanta, K. K.
Saxena, S.
Chattopadhyay, S. K.
Narkar, R.
Mahangade, R.
Hadge, G. B.
Tematy:: banana pseudostem sap
cellulose
cotton fabric
flame retardant
thermogravimetry; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/778031.pdf Link otwiera się w nowym oknie
Opis:: Flame retardancy was imparted in cellulosic cotton textile using banana pseudostem sap (BPS), an eco-friendly natural product. The extracted sap was made alkaline and applied in pre-mordanted bleached and mercerized cotton fabrics. Flame retardant properties of both the control and the treated fabrics were analysed in terms of limiting oxygen index (LOI), horizontal and vertical flammability. Fabrics treated with the non-diluted BPS were found to have good flame retardant property with LOI of 30 compared to the control fabric with LOI of 18, i.e., an increase of 1.6 times. In the vertical flammability test, the BPS treated fabric showed flame for a few seconds and then, got extinguished. In the horizontal flammability test, the treated fabric showed no flame, but was burning only with an afterglow with a propagation rate of 7.5 mm/min, which was almost 10 times lower than that noted with the control fabric. The thermal degradation and the pyrolysis of the fabric samples were studied using a thermogravimetric analysis (TGA), and the chemical composition by FTIR, SEM and EDX, besides the pure BPS being characterized by EDX and mass spectroscopy. The fabric after the treatment was found to produce stable natural khaki colour, and there was no significant degradation in mechanical strengths. Based on the results, the mechanism of imparting flame retardancy to cellulosic textile and the formation of natural colour on it using the proposed BPS treatment have been postulated.
Dostawca treści:: Biblioteka Nauki