• Korean Journal of Food Science and Technology
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• v.30 no.4
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• pp.941-947
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• 1998

We isolated seventy two lactic acid bacteria and two hundred yeast from traditional Andong sikhe. Microorganisms were isolate from 4 kinds of traditional Andong sikhe. The optimum temperature and pH for growth of sikhe yeast, No. SCS 5, was $30^{\circ}C$ and 4.5, respectively. SCS 5 produced $CO_2$ gas and 1.5% of alcohol in malt extract broth. SCS 5 was identified as S. cersvisiae from the observation of shape of vegetative reproduction, morphological and cultural chararteristics, fermentation and assimilation of carbon sources, and physiological characteristics.

• Journal of the Korean Geotechnical Society
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• v.24 no.11
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• pp.157-166
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• 2008

To investigate the relationship between compressive strength ($q_u$) of Lightweight Air-mixed soil (LAS) and its physical deformation coefficient ($E_{50}$), a series of unconfined compressive tests have been performed on specimens of LAS according to various dredged soil types by percentage of sand, silt and clay. From the results it was found that the cement content ($C_i$) and unit weight (${\gamma}_m$) are most influence factors on strength, and percentage of sand, silt, clay by grain size analysis (KS F2302) have more effect on compressive strength than other physical properties of soil. It was also found that the rate of strength (a) increases with curing time, but it reduces with the increase of percentage of clay ($C_%$).

• Iberoamérica
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• v.12 no.1
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• pp.55-86
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• 2010

Después de la década 1990, la soja ha sido un agro-producto más importante en Paraguay. Pero la soja ha convertido el campo rural en la zona de la producción, es decir, la zona de sojización, para la exportación. Por otro lado, el campo rural se ha deteriorado por el aumento de la extensión del cultivo sojal. Los cultivos se extienden a lo largo de cientos de kilómetrios y afectan zonas muy cercanas a comunidades, colonias y otros asentamientos campesionos e indígenas, incluyendo escuelas, hogares, charcas familiares y comunitarias. Los sojeros utilizaron los agrotóxicos que contaminaron la tierra, agua y alimentos. Aunque los campesinos no quieren vender sus tierras, no ven otras alternativas ante los graves problemas que conllevan las masivas fumigaciones. Ellos venden sus lotes y migraron a ciudades. Se pierde la soberanía territorial, pues las tierras pasan a manos extranjeras, y la soberanía alimentaria, porque se desplaza la diversificación y los cultivos de subsistencia, expulsando a los campesions hacia las ciudades. Ante el agravamiento de la situación causado por el incremento del cultivo de la soja, los campesinos empezaron a resistir, es decir, desarrollar 'la guerra de la soja' contra los sojeros y el gobierno paraguayo que no tenia refuerzos de resolver los problemas. Los campesinos formaron coordinadoras por la defensa de sus tierras y de su modo de vida contra los sojeros. Las luchas y movilizaciones reclaman no sólo un nuevo tipo de reforma agraria sino también la defensa de la soberanía económica, alimentaria y territorial, el derecho a producir con la propia semilla y a desarrollar técnicas agrícolas adecuadas de acuerdo con la economía campesina y el equilibrio del medio ambiente, el desarrollo de formas sociales de producción y la democratización en el medio rural.

• Architectural research
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• v.18 no.4
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• pp.121-128
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• 2016

Low-income housing policies in South Korea have been pursued mostly by providing public rental housing for less privileged social groups. In contrast to this notion of housing, this article argues for housing ownership by low-income families. Two examples of this ownership policy are found in Chile. Incremental housing involves an open-ended housing platform, which requires home-dwellers to complete the construction process themselves. This article aims to examine structural, spatial and formal characteristics of the incremental housing projects. Taking the perspective of the home-dweller during the incremental construction process, we evaluate the houses before and after customization. Thus, we use data from field-work conducted for seven months in the Santiago Metropolitan Area of Chile. Using qualitative methods such as observation, semi-structured interviews, and surveys we focus on the Elemental Lo Espejo incremental housing project and then compare it with the Las Higuera housing project. The latter is representative of the incremental houses delivered by the Chilean government. In comparing these two projects, we aim to articulate the lessons of incremental housing with the intention of suggesting possible future developments for a wider-reaching incremental housing program.

• Korean Journal of Materials Research
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• v.14 no.7
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• pp.505-510
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• 2004

The glass-ceramic based on LAS($Li_{2}O-Al_{2}O_3-SiO_{2}$) system was observed using SEM(Scanning Electric Microscopy) and AFM(Atomic Force Microscopy) and it was expected to get a correlation between the crystal size and the surface roughness through the result. At heat treatment conditions (the nucleation: $740\~800^{\circ}C$, the crystal growth: $900\~1150^{\circ}C$), the crystal size was increased from 72 to 450 nm so that the mean of surface roughness was also risen from 0.8 to 6.3 nm. Based on the results, the surface roughness of glass-ceramic is controlled by the factors, crystal size, crystallines, and the condition of heat treatment.

• Journal of the Korean Society for information Management
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• v.23 no.3 s.61
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• pp.205-221
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• 2006

To investigate the present states and analyze the library anxiety among academic library users, A University library users sampled systematically and surveyed. Data collected from 707 students are analyzed and compared with the previous studies. The average LAS score is 2.55 and show differences in sex, grade levels, and major areas of study. Library use instruction reduces anxiety subscale of barriers with staff. Library anxiety is also differed according to the frequency of library visit. Especially, the anxiety subscale of affective barriers is decreased according to the grade level and frequency of library visit. Based on the results, recommendations are suggested to overcome the library anxiety.

• Journal of Positioning, Navigation, and Timing
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• v.7 no.1
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• pp.25-35
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• 2018

This paper describes the measurement of pulse positioning (input time) to calculate a time of arrival (TOA) that takes from transmitting a signal from the target of multilateration (MLAT) system to receiving the signal at the receiver. In this regard, this paper analyzes performances of simple threshold method and level adjust system (LAS) method, which is one of the adaptive threshold detector (ATD) methods, among many methods to calculate pulse positioning of signal received at the receiver. To this end, Cramer-rao lower bound (CRLB) with regard to pulse positioning, which was measured when signals transmitted from a transponder mounted at the target were received at the receiver, was induced and then deviation sizes with regard to pulse positioning, which was measured with simple threshold and LAS methods through MATLAB simulations, were compared. Next, problems occurring according to a difference in amplitude of signals inputted to each receiver are described when pulse positioning is measured at multiple receivers located at a different distance from the target as is the case in the MLAT system. Furthermore, LAS method to resolve the problems is explained. Lastly, this study analyzes whether a pulse positioning error occurring due to the signal noise satisfies the requirement (6 nsec. or lower) recommended for the MLAT system when using these two methods.

• Journal of the Korean Society for Library and Information Science
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• v.38 no.2
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• pp.29-47
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• 2004

As affective barriers to library and information use, library anxiety(Mellon, 1986) has been studied in reference/information services and bibliographic instructions. The paper revisits Mellon's theory of library anxiety and Bostick's(1992) Library Anxiety Scale(LAS) in the digital library environment. In particular, this study attempts to address the inadequacy of the continued applications of LAS in the digital library environment, although the scale has been used unquestionably as the instrument measuring library anxiety. This contention was substantiated by three service trends in digital libraries(i.e., digital reference services, remote access, and transition from bibliographic instructions to information literacy) and by re-analyses of published library anxiety research papers in recent years. This study addresses the need for scale development that could measure anxieties of digital library users. It also suggests Information Literacy Anxiety Scale(ILAS) as a direction for the new scale.

• Journal of Korean Society of Water and Wastewater
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• v.14 no.1
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• pp.99-107
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• 2000

In this article, the removal of surfactant by ozone and BAC was studied. Batch and pilot tests were carried out for these studies. In batch tests, efficiency of ozone oxidation process was evaluated for LAS(Linear Alkylbenzen Sulfonate) and SLS(Sodium Lauryl Sulfate) removal. Under oxidant conditions, the removal of LAS was more effective than that of SLS. The removal of surfactant was more enhanced with increasing pH in oxidant systems. Pilot tests are carried out with BAC single process and ozone oxidation/BAC combined process. The removal of LAS was more effective in ozone oxidation/BAC combined process than BAC single process about 10-20%. In the case of SLS, the efficiency of BAC single process was similar to that of ozone oxidation BAC combined process. According to temperature, the removal efficiency of SLS changed from 70% to 95% and initial concentration of surfactant had no effects on removal efficiency of SLC under applied temperature above $15^{\circ}C$.

• Journal of Communications and Networks
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• v.7 no.2
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• pp.207-221
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• 2005

The proliferation of wireless local area networks (WLANs) offering high data rate in hot spot area have spurred the demand for possible WLANs and third-generation (3G) cellular network integration solutions as the initiative step towards 4G systems. This paper provides a novel architecture for seamless location-aware integration of WLANs into 3G cellular networks and also an analysis for the efficient handover techniques. We introduce location as a key context in secure roaming mechanism for context-aware interworking in 4G systems. The fast secure roaming with location-aware authentication is implemented at an entity called location-aware service (LAS) broker that utilizes the concepts of direction of user and pre-warming zone. The location-ware interworking architecture supports seamless roaming services among heterogeneous wireless networks including WLANs, wireless metropolitan area networks (WMANs), and 3G cellular networks. This paper also includes a description of procedures needed to implement efficient mobility and location management. We show how the LAS broker with pre-warming and context transfer can obtain significant lower latency in the vertical handover.