Due to the numerous problems raised by the increase in the emission of pollutant gases in the atmosphere, it has become essential a more effective monitoring of air quality. With that, several studies published in recent years have shown a series of mechanisms and techniques with ability to monitor air quality in a variety of ways. Approaching it, this work proposes a platform formed by a wireless sensor network, with the ability to monitor the levels of pollution at several points simultaneously. In addition, was implement the data mining tool, where by means of algorithms classification based on artificial intelligence concepts, it is possible that a more advanced analysis of air quality is performed. The platform was used for the monitoring of two public places, which have large traffic of vehicles and people daily, for a period of 12 consecutive weeks. On weekdays, peaks of 703 ppm of CO2 concentration were measured between 06:00 and 07:00 pm by the sensors located near the highways or avenues with higher traffic of cars. Conversely, indices around 500 ppm were the lowest obtained near 6:00 am where the car traffic is very low. This is the best time for hiking. © 2018 American Institute of Chemical Engineers Environ Prog, 37: 1901–1907, 2018

Resumo Os termopares são dispositivos elétricos de simples concepção utilizados na medição de temperatura, e possuem um grande uso na indústria. O termopar necessita de uma junção eficiente para os dois fios metálicos que o compõem, que comumente é feita pela soldagem. O processo de soldagem utilizado para construir um termopar pode ser feito de várias maneiras, e a mais comum e eficiente é a soldagem por descarga capacitiva, que irá fundir a liga e criar uma união, mantendo as propriedades dos metais envolvidos e resultar e uma união homogênea dos dois metais. Este trabalho tem como objetivo desenvolver um equipamento capaz de realizar automaticamente esta solda em ambiente inerte, por descarga capacitiva, cujo valor da energia a ser descarregada para a união do termopar é determinada utilizando o princípio da conservação da massa e energia em ligas metálicas e bitolas preestabelecidas de alguns tipos de termopares. Os resultados obtidos com a soldagem de diferentes tipos e bitolas de termopar foram analisados com relação ao aspecto visual e de softwares de análise de imagens, juntamente com curvas de calibração. Os termopares foram considerados de boa qualidade de acordo com os parâmetros de análise estabelecidos, e comparações com termopares comerciais.

The aim of SEEP2017 is to bring together the researches within the field of sustainable energy and environmental protection from all over the world.The contributed papers are grouped in 18 sessions in order to provide access to readers out of 300 contributions prepared by authors from 52 countries.We thank the distinguished plenary and keynote speakers and chairs who have kindly consented to participate at this conference. We are also grateful to all the authors for their papers and to all committee members.We believe that scientific results and professional debates shall not only be an incentive for development, but also for making new friendships and possible future scientific development projects. Increasing efforts and resources have been devoted to research during environmental studies, including the assessment of various harmful impacts from industrial, civic, business, transportation and other economy activities. Environmental impacts are usually quantified through Life Cycle Assessment (LCA). In recent years, footprints have emerged as efficient and useful indicators to use within LCA. The footprint assessment techniques has provided a set of tools enabling the evaluation of Greenhouse Gas (GHG) -including CO2, emissions and the corresponding effective flows on the world scale. From all such indicators, the energy footprint represents the area of forest that would be required to absorb the GHG emissions resulting from the energy consumption required for a certain activity, excluding the proportion absorbed by the oceans, and the area occupied by hydroelectric dams and reservoirs for hydropower.An overview of the virtual GHG flow trends in the international trade, associating the GHG and water footprints with the consumption of goods and services is performed. Several important indications have been obtained: (a) There are significant GHG gaps between producer's and consumer's emissions -US and EU have high absolute net imports GHG budget. (b) China is an exporting country and increasingly carries a load of GHG emission and virtual water export associated with consumption in the relevant importing countries. (c) International trade can reduce global environmental pressure by redirecting import to products produced with lower intensity of GHG emissions and lower water footprints, or producing them domestically.To develop self-sufficient regions based on more efficient processes by combining neighbouring countries can be a promising development. A future direction should be focused on two main areas: (1) To provide the self-sufficient regions based on more efficient processes by combining production of surrounding countries. (2) To develop the shared mechanism and market share of virtual carbon between trading partners regionally and internationally. HAKAN SERHAD SOYHAN 4 Development in energy sector, technological advancements, production and consumption amounts in the countries and environmental awareness give shape to industry of energy. When the dependency is taken into account in terms of natural...

Abstract. Welding is the most common process to join two types of metal. Capacitive welding is used in small alloys, jewelry and temperature sensors. A good quality welding is composed by a homogeneous distribution and uniformity of the material at welding point and a mass conservation, keeping the metal crystalline proprieties. Capacitive welding consists in submitting a metal to an electric arc, storing energy in capacitors, when released will melt alloy and creates a union. In an inertial chamber the atmosphere is controlled, and Argon is injected by a solenoid valve, responsible to control Argon from a cylinder. Argon is a shielding gas responsible for the non-inclusion of external elements in the weld. This study develops equipment able to make capacitive welding using the principles mass and energy conservation in alloys and gauges pre-established, of different types of metals in an inertial environment, with the objective of create a good quality and efficient weld with low cost equipment with easy manipulation.

Welding is the most common process to join two types of metal. Capacitive welding is used in small alloys, jewelry and temperature sensors. A good quality welding is composed by a homogeneous distribution and uniformity of the material at welding point and a mass conservation, keeping the metal crystalline proprieties. Capacitive welding consists in submitting a metal to an electric arc, storing energy in capacitors, when released will melt alloy and creates a union. In an inertial chamber the atmosphere is controlled and Argon is injected by a solenoid valve, responsible to control Argon from a cylinder. Argon is a shielding gas responsible for the non-inclusion of external elements in the weld. This study develops equipment able to make capacitive welding using the principles mass and energy conservation in alloys and gauges pre-established, of different types of metals in an inertial environment, with the objective of create a good quality and efficient weld with low cost equipment with easy manipulation.