Wyniki wyszukiwania - BazTech

1

Green solar source for outdoor environment monitoring using wireless RF 2.4 GHz for Smart Farm application

Boonsong Wasana

Przegląd Elektrotechniczny

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2021

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R. 97, nr 8

79--83

EN

Green technologies are of great interest as they are frequently culled by domestic households and industrial sectors, especially in intelligent farming applications. The power supply resource is the main factor that is used in an outdoor environment because it is not convenient to use a wall adapter in outdoor conditions. In this study, the quality of the environment monitoring system and green power supply has been developed using solar energy resources, which are more convenient to facilitate the outdoor environment without any wall adapter or external battery added. Thus, a weather monitoring system embedded with solar power source management is proposed to focus on data linkage quality measurement based on received signal strength (RSS). This proposed system involves the application of wireless RF ZigBee-Pro technology based on the IEEE802.15.4 standard using 2.4 GHz in a microwave frequency band. The environment monitoring system consists of multiple biosensors: oxygen (O2), temperature, and humidity sensors to monitor the environmental condition of a farm area. The monitored information data of the environment monitoring system according to its sensing as mentioned are transmitted to the host station correctly with well-received signal strength indicator (RSSI) value with usage convenience at both of the indoor and outdoor environments. The results indicated that the solar panel kept a maximum current and maximum power of 335.48 mA and 8.76 W, respectively, at noontime. Moreover, the RSSI performance is an essential factor for the wireless communication networking for the environment monitoring system between the solar power and wall adapter supplies, which is suitable for the intelligent farming application. The findings indicated that both power sources' quality is a similar performance at the confidence of 95%.

PL

W tym badaniu proponuje się system monitorowania pogody z wbudowanym zarządzaniem źródłem energii słonecznej, aby skupić się na pomiarach jakości łącza danych w oparciu o siłę odbieranego sygnału (RSS). Proponowany system obejmuje zastosowanie bezprzewodowej technologii RF ZigBee-Pro opartej na standardzie IEEE802.15.4 wykorzystującej 2,4 GHz w paśmie częstotliwości mikrofalowych. System monitorowania środowiska składa się z wielu bioczujników: tlenu (O2), temperatury i wilgotności, które monitorują stan środowiska na terenie gospodarstwa. Wyniki wykazały, że panel słoneczny utrzymywał maksymalny prąd i maksymalną moc odpowiednio 335,48 mA i 8,76 W w południe. Co więcej, wydajność RSSI jest istotnym czynnikiem dla bezprzewodowej komunikacji sieciowej dla systemu monitorowania środowiska między zasilaniem słonecznym a zasilaczami ściennymi, które są odpowiednie do inteligentnego zastosowania w rolnictwie. Wyniki wskazują, że jakość obu źródeł zasilania jest podobna przy ufności 95%.

2

Spalanie pojedynczych ziaren węgla w atmosferze O2/CO2

Kosowska-Golachowska M., Gajewski W., Kłos K.

Systems : journal of transdisciplinary systems science

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2008

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Vol. 13, spec. iss. 1/2

270--277

EN

The combustion of coal in mixture of pure O2 and recycled flue gas is one variant of a novel combustion approach called oxy-fuel combustion. Conventional boilers use air for combustion in which the nitrogen from the air (approximately 79% by volume) dilutes the CO2 concentration in the flue gas. The capture of carbon dioxide from such dilute mixtures using amine stripping is relatively expensive. The recycled flue gases mainly consist of CO2 and H2O and are used to create combustion conditions similar to those of air. Spherical coal particles of 10 mm in diameter were combusted in the mixtures of O2/CO2 in a 10 kW bench scale unit at a temperature of 700-85O°C.

3

Effect of NO, O2, SO2 on Nitrous Oxide Conversion over Fe- and Co-containing Zeolite and Zirconia Catalysts

Boichuk T. M., Orlyk S. M.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 1-2

141-147

EN

The conditions of positive effect of NO, SO2 and O2 on conversion of nitrous oxide over iron-containing zeolite-based catalysts were found in contrast to cobalt-containing catalysts. The results have been interpreted from the standpoint of N2O decompositionmechanism. In simultaneous reduction of nitrogen(I,II) oxides by C3–C4 alkanes higher conversions of NO and N2O are achieved over Co-containing and FexOy/H-ZSM-5 catalysts, respectively.

4

Biological applications of electron spin resonance methods - spin trapping and spin labelling

Maliszewska-Mazur M.

Biocybernetics and Biomedical Engineering

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2007

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Vol. 27, no. 4

85-97

EN

In this paper, use of electron spin resonance methods in biological investigations and trends in their development are presented. The first method, spin trapping technique consists in using of spin traps, i.e. compounds that form a stable free radical by reacting with an unstable free radical. Hydroxyl radical generation by living human granulocytes stimulated by dihydralazine was determined by ESR using DMPO as a spin trapping reagent. The second method, spin labelling is an example of a "reporter group" technique. The effect of dihydralazine on membrane bilayer was found by spin-labelling technique with the use of 5-, 12-, 16-doxylstearate.

5

Single-hole one-electron superexcited states and doubly-excited states of molecules as studied by coincident electron-energy-loss spectroscopy

Odagiri T., Fukuzawa H., Takahashi K., Kouchi N., Hatano Y.

Nukleonika

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2003

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Vol. 48, nr 2

95-102

EN

The single-hole one-electron superexcited states and doubly-excited states of H2, D2, N2 and O2 have been investigated by means of the coincident electron-energy-loss spectroscopy that we developed. In this method the electron-energy-loss spectra tagged with the vacuum ultraviolet fluorescences emitted by the neutral fragments produced from superexcited molecules are measured by means of electron-photon coincidence technique. The contribution from ionization in this sort of electronenergy- loss spectra is suppressed to a large extent, and thus the structures attributed to the superexcited states of molecules become highlighted. The comparison with the photoexcitation experiments by means of the oscillator strengths give us clear discrimination between allowed and forbidden superexcited-states. As to H2, D2, and N2, the doubly-excited states including those found in the present experiment have been investigated in terms of both their energies and dynamical behavior. A new possibility of the coincident electron-energy-loss spectroscopy has been established in investigating the single-hole one-electron superexcited states of O2: the time-resolved coincident electron-energy-loss spectrum has been measured to distinguish between the direct process producing excited oxygen atoms and indirect one due to cascade transition. It has turned out that the coincident electron-energy-loss spectroscopy is a key tool for investigating superexcited molecules.