PREFACE

PREFAC

CONFERENCE PROGRAM

Fluidization XIII: New Paradigm in Fluidization Engineering May 16-21, 2010 Hotel Hyundai, Gyeong-ju, Kore

Gasification of Municipal Solid Waste

Gasification of municipal solid waste (MSW) is an attractive alternative fuel production process for the treatment of solid waste as it has several potential benefits over traditional combustion of MSW. Syngas produced from the gasification of MSW can be utilized as a gas fuel being combusted in a conventional burner or in a gas engine to utilize the heat or produce electricity. Also, it can be used as a building block for producing valuable products such as chemicals and other forms of fuel energy. This book chapter covers the properties of MSW, gasification mechanism, chemistry, operating conditions, gasification technologies, processes, recovery system, and most importantly by reviewing the environmental impacts of MSW gasification. As one of recent advanced technologies, a case study of pilot-scale MSW gasification is introduced, which could be one of the most efficient pathways to utilize the technology to produce electricity with a newly developed gasification process by reducing tar and pollutant emission

COMBUSTION CHARACTERISTICS AND EMISSION OF HAZARDOUS AIR POLLUTANTS IN COMMERCIAL FLUIDIZED BED COMBUSTORS FOR SEWAGE SLUDGE

Since the disposal of sewage sludge in ocean has been prohibited recently according to London Dumping Convention, technological need for treating sewage sludge safely and efficiently are getting increased in Korea. FBC (Fluidized Bed Combustor) technology has been selected and utilized as one of the alternatives because of combustible content in sludge, on-going process development to maintain the best combustion efficiency, and good heat recovery for energy utilization. In this paper, the process and combustion characteristics of commercially operating FBC incineration plants with the capacity ranging from 50 – 150 tons of sludge per day were investigated by comparing emission data from 4 different plants. Concentrations of hazardous gaseous pollutants (HAPs) such as fine particulate matter, heavy metals, and dioxin from sludge combustion before and after air pollution control devices were measured and analyzed at commercial operating conditions of one typical incinerator. Most of emission data at stack showed under the environmental regulatory limits. Mercury and some heavy metals emission have been reduced significantly as co-beneficial effect since the air pollution control configuration was well arranged and installed to control the regulatory gases such as NOx, SO2, particulates, and dioxin. Sludge, especially generated from industrial plants, contained measurable amounts of acidic materials and heavy metals including Hg. Therefore, such metal emission should receive an attention by monitoring them and further mass balance study for better understanding their fates in the process must proceed in future

Colorimetric Analysis on Flocculation of Bioinspired Au Self-Assembly for Biophotonic Application

Gold nanoparticles exhibited strong surface plasmon absorption and couplings between neighboring particles within bioactivated self-assembly modified their optical properties. Colorimetric analysis on the optical modification of surface plasmon resoanance (SPR) shift and flocculation parameter functionalized bioinspired gold assembly for biophotonic application. The physical origin of bioinspired gold aggregation-induced shifting, decreasing, or broadening of the plasmon absorption spectra could be explained in terms of dynamic depolarization, collisional damping, and shadowing effects

Phase Contrast Microradiography of Mouse Lung Using Synchrotron X-ray: Correlation with Optical Microscopy

Purpose: The purpose of this study is to evaluate the feasibility of phase contrast X-ray microtomography and microradiography, using a polychromatic synchrotron X-ray, for analysis of the mouse lung microstructure. Materials and Methods: Normal mice were used for experiments. Some of the mouse lungs were prepared by the lung fixation-inflation method. The resulting sponge-like inflated lung samples were used for microtomography. The remaining mouse lungs were cut into 10 um sections and were used for microradiography and optical microscopic correlation. The experiments on mouse lung samples were per-formed at the 7B2 beamline of the Pohang Light Source in Korea. Results: Phase contrast X-ray microtomography of inflated lung samples showed individual alveolar structure on 3-D reconstruction. Phase contrast microradiographs of thin lung samples showed microstructure of lung, such as alveoli and bronchioles, and were well correlated with optical microscopic images. Conclusions: The results indicate that the phase contrast X-ray microtomography and microradiography using polychromatic synchrotron X-ray is feasible for evaluation of microstructure of the lung.X115sciescopuskc

La relación entre apalancamiento y poder de negociación de los sindicatos: Evidencia teórica y empírica

This study examines whether a firm’s leverage can be used strategically to improve its bargaining position with an organized labor union using samples of non-financial firms listed on the Korean Stock Exchange (KSE) from 1999 to 2013. Through empirical testing, we find that the portfolio with the lowest union labor coverage has the lowest leverage, while the portfolio with the highest union labor coverage has the highest leverage. We also find that collective bargaining power positively affects leverage through the regression of leverage on the bargaining power of the labor union, regardless of the analysis methods, such as static and dynamic models. With a robustness test model that used the industry adjusted labor union concentration index (IUCI), we obtain evidence that collective bargaining power positively influences leverage, which corresponds with the regression results. In conclusion, we suggest the existence of evidence demonstrating that variables related to labor unions affect leverage levels, as suggested in previous studies.Este trabajo analiza si una firma puede utilizar estratégicamente su apalancamiento para mejorar su posición negociadora con un sindicato. Para ello se utiliza información del mercado accionario de Corea para el periodo 1999-2013, encontrando una relación creciente entre cobertura sindical y apalancamiento. También se encuentra que el mayor poder en negociaciones colectivas afecta positivamente al apalancamiento

Relationship between leverage and the bargaining power of labor unions: evidence from theoretical and empirical perspectives

This study examines whether a firm’s leverage can be used strategically to improve its bargaining position with an organized labor union using samples of non-financial firms listed on the Korean Stock Exchange (KSE) from 1999 to 2013. Through empirical testing, we find that the portfolio with the lowest union labor coverage has the lowest leverage, while the portfolio with the highest union labor coverage has the highest leverage. We also find that collective bargaining power positively affects leverage through the regression of leverage on the bargaining power of the labor union, regardless of the analysis methods, such as static and dynamic models. With a robustness test model that used the industry adjusted labor union concentration index (IUCI), we obtain evidence that collective bargaining power positively influences leverage, which corresponds with the regression results. In conclusion, we suggest the existence of evidence demonstrating that variables related to labor unions affect leverage levels, as suggested in previous studies.Este trabajo analiza si una firma puede utilizar estratégicamente su apalancamiento para mejorar su posición negociadora con un sindicato. Para ello se utiliza información del mercado accionario de Corea para el periodo 1999-2013, encontrando una relación creciente entre cobertura sindical y apalancamiento. También se encuentra que el mayor poder en negociaciones colectivas afecta positivamente al apalancamiento