• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.32 no.2
• /
• pp.160-164
• /
• 1999

Algicidal activities of Alteromonas sp. SR-14 against Chaetoceros calcitrans were investigated at various culture conditions. The algicidal activity by Alteromonas sp. SK-14 was dependent on temperature. In mixed culture of C, calcitrans and Alteromonas sp. SR-14 at various temperatures, the algicidal activity of Alteronzonas sp. SR-14 was the highest at $20^{\circ}C$, but not showed algicidal activity above $25^{\circ}C$. With the inoculation of $10^4$ cells/ml of C. calcitrans, the diatom could not grow at the microalgal culture condition until 15 days by the simultaneous inoculation of less than 10 cells/ml of Alteromonas sp. SR-14. Alteromonas sp. SR-14 showed the strongest algicidal activity against logarithmic phase cells of C. calcitrans. During the mixed culture of C. calcitrans and Alteromonas sp. SR-14, supplementation of Conwy medium nutrients, changes of light intensity with 1,300$\~$4,600 lux and agitation with 200 rpm did not affect the algicidal activity.

• Journal of Korean Society of Forest Science
• /
• v.85 no.2
• /
• pp.225-237
• /
• 1996

The cultural characteristics of fruit bodies formation in the two selected strains(brown and yellow strain) of winter mushroom collected in Korea were investigated. The effects of various environmental conditions and physicochemical pretreatments were evaluated by the character of fruit bodies. There was no differences between two strains in non-selectivity of media, optimum temperature($11^{\circ}C{\sim}15^{\circ}C$), relative humidity(90%), and illumination(60 lux). In the application of alternated temperature (the best condition : $5^{\circ}C{\cdot}10^{\circ}C$ and $5^{\circ}C{\cdot}15^{\circ}C$), ultraviolet ray(30~50 seconds), electricity(5 seconds), thiamine hydrochloride(0.05~0.1%), urea, and IAA as a pretreatments, there was no differences between two strains. The brown strain had larger pileus and longer stipes than these of the yellow strain, while the yellow strain yielded more weight and number of the fruit body formation than the brown strain.

• Korean Journal of Plant Resources
• /
• v.33 no.6
• /
• pp.696-706
• /
• 2020

Cordyceps has been used in traditional Chinese medicine more than 2000 year ago. In this study, the new Cordyceps militaris was founded and isolated from O-dae mountain in Korea, and was identified its genetic characteristics. The newly isolation strain HB8 was most closet to Cordyceps militaris W141449 (99.82%), Cordyceps militaris JLCY-LI819 (99.82%) and Cordyceps militaris 4642 (99.81%), respectively. the genotypic result was show that train HB8 was belonging to the Cordyceps militaris genus, therefore, Cordycep militaris HB8 proposed with accession number MT835161. This study we find the optimal condition for production of cordycepin from Cordyceps militaris HB8 was 8 mg/g (200 g of pupa, 1 g of KH₂PO₄, 0.5 g of K₂HPO₄, 20 g of glucose, 1 g of MgSO₄, 0.05 g of vitamin B1, and 1 mg of NAA per liter; light condition 300-700 Lux and day/night was 14 h/10 h) and the optimum condition for the production of adenosine was 2.6 mg/g (15 g of skim milk powder, 1 g of KH₂PO₄, 0.5 g of K₂HPO₄, 20 g of glucose, 1 g of MgSO₄, 0.05 g of vitamin B1, and 1 mg of NAA per liter; light condition 300-700 Lux and day/night was 14 h/10 h).

• Journal of Aquaculture
• /
• v.2 no.1
• /
• pp.1-7
• /
• 1989

Axenic tissue culture of a marine red algae Porphyra yezoensis foma narawaensis was established for the vegetative propagation of tissues as a seed stock and for the development of a low salinity-tolerant cell line. Callus tissues have been induced from the vegetative area of blade away from the hold fast when grown on PES-agar medium. The brownish red fragile callus was maintained under fluorescent light of ca. 2000 lux with 12 : 12 hr L : D at $16^{\circ}C$. Amounts of carbohydrate and protein was determined against the weight of callus. Optimum temperature of the callus growth was $14^{\circ}C\~18^{\circ}C$. Optimun concentration of sodium chloride was $2.0\%$ for the callus growth in PES-agar medium.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.18 no.12
• /
• pp.2968-2974
• /
• 2014

When lighting has installed indoor, we control lighting using human-detecting sensors for people who pass at night and places that are lack of quantity of light. However, malfunction can be caused by positions of inappropriate sensors, and in the case of passages of big buildings, it is a problem that even after a person pass, light apparatuses are turned on for a long time. In this paper, we propose lighting control system based on location positioning for energy saving that control lighting in accordance with passers's position through indoor location positioning. This system use the fingerprinting technology that is one of the location positioning technologies and RSSI data that is collected by a smart device. Using those, it can turn on only lightings that are included in the positioned location and reduce unnecessary power consumption. As a result of experiment, on condition that four people were existing and illumination was 308 lux, we assured reduction effect of 49 Wh.

• International Journal of Internet, Broadcasting and Communication
• /
• v.7 no.1
• /
• pp.15-19
• /
• 2015

The depth information of an image is used in a variety of applications including 2D/3D conversion, multi-view extraction, modeling, depth keying, etc. There are various methods to acquire depth information, such as the method to use a stereo camera, the method to use the depth camera of flight time (TOF) method, the method to use 3D modeling software, the method to use 3D scanner and the method to use a structured light just like Microsoft's Kinect. In particular, the depth camera of TOF method measures the distance using infrared light, whereas TOF sensor depends on the sensitivity of optical light of an image sensor (CCD/CMOS). Thus, it is mandatory for the existing image sensors to get an infrared light image by bundling several pixels; these requirements generate a phenomenon to reduce the resolution of an image. This thesis proposed a measure to acquire a high-resolution image through gradual area movement while acquiring a low-resolution image through pixel bundling method. From this measure, one can obtain an effect of acquiring image information in which illumination intensity (lux) and resolution were improved without increasing the performance of an image sensor since the image resolution is not improved as resolving a low-illumination intensity (lux) in accordance with the gradual pixel bundling algorithm.

• The Korean Journal of Mycology
• /
• v.17 no.4
• /
• pp.189-193
• /
• 1989

Ganoderma lucidum formed uniquely non-basidiocarpous basidiospore (NBB) from the aerial mycelia on agar media without the normal basidiocarps. Light was necessary for NBB formation. Best sporulation was obtained at the periodic exposure of 16 hour light and 8 hour darkness for more than 8 days. Effective wave length was blue and yellow but non sporulation was induced by near U.V. light. Effective light intensity for NBB bearing appeared to be about 1,000 Lux as white light. Photomorphogenetic responses in Ganoderma lucidum were clearly different among strains of the fungus.

• Journal of Energy Engineering
• /
• v.26 no.1
• /
• pp.34-44
• /
• 2017

This paper deals with the effectiveness of a fiber optic solar lighting system that uses a Fresnel lens mounted on a two-axis solar tracker. A series of comparative analyses were made concerning its performance as compared to fluorescent lighting by using a simulation model based on ECOTECT and RADIANCE as well as referring to actual data. ECOTECT was used to model the test room (space) while RADIANCE was used for its indoor lighting conditions (environment). It was found that the average indoor light levels of fluorescent lighting fully satisfy the KS standard (KS A 3011, general office, class [G]: 300-400-600lux) whereas those of the solar lighting with light diffusers depends on the occlusion factor of roller shades installed on the south window.

• Journal of Microbiology and Biotechnology
• /
• v.17 no.2
• /
• pp.325-334
• /
• 2007

Recently, quorum sensing has been implicated as an important global regulator controlling the production of numerous virulence factors such as capsular polysaccharides in bacterial pathogens. The nucleotide and deduced amino acid sequences of smcR, a homolog of V. harveyi luxR identified from V. vulnificus ATCC29307, were analyzed. The amino acid sequence of SmcR from V. vulnificus was 72 to 92% similar to those of LuxR homologs from Vibrio spp. Functions of SmcR were assessed by the construction of an isogenic mutant, whose smcR gene was inactivated by allelic exchanges, and by evaluating its phenotype changes in vitro and in mice. The disruption of smcR resulted in a significant alteration in biofilm formation, in type of colony morphology, and in motility. When compared with the wild-type, the smcR mutant exhibited reduced survival under adverse conditions, such as acidic pH and hyperosmotic stress. The smcR mutant exhibited decreased cytotoxic activity toward INT 407 cells in vitro. Furthermore, the intraperitoneal $LD_{50}$ of the smcR mutant was approximately $10^2$ times higher than that of parental wild-type. Therefore, it appears that SmcR is a novel global regulator, controlling numerous genes contributing to the pathogenesis as well as survival of V. vulnificus.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.26 no.3
• /
• pp.258-266
• /
• 1998

The purpose of this study is to investigate the actual conditions, to find problems, and to present an improvement plan of interior landscape in the subway stationis. Moreoiver, it will presume the possibilties to develop the subway and ways to utilie underground space effectively. The results are summarized as follows A light intensity was recorded 0-100 Lux as the lowest light and 500 Lux below as the highest in 61 subway stations. An average temperature of 12 $^{\circ}C$and an air humidity of 38% were recorded over a 4 month period from January to April, but includes a drastic variaton between -8.5$^{\circ}C$ and 21.5$^{\circ}C$. Soil acidity of pH 7 below and soil moisture of 1-2 wet degree were apeared in subway stations mostly. Plant forms consisted of artificial flower & flower. Plant species were recorded at a total of 54 species and appeared in the order of Araucaria heteropylla, Ophiophogon jaburan, Aspidistra elatior cv. 'Asahi' and Hedera helix. Plant height was, for the most part, below 0.5m. Plant species that was fined of conditions were Palm, Camellia japonica, Araucaria heterophylla as a high plant, dracaena fragrans, dracaena deremensis cv. Wakneckii as a middle plant, and Ophiopogon jaburan, Hedra helix, ytomium falcatum, Aspidistra elatior cv. Asahi as a low plant. It used to water materials such as small pool, small cascade, water cycles and natural materials such as natural rock, small rock, sand, bark and animal materials such as squirrels, birds, goldfish as an object for plants in the subway stations. From these actual conditions, First of all, It must make up physical environments such as light, temperature humidity, soil for plant growth, and is important to chooce suitable indoor plants and draw up systematic management in the subway environments. Also, it change plants frequently and uses variable objects for subway stationi individuatism, Moreover, indoor plants with strong environmental adaptation abities such as shade tolerance, drought tolerance and cold tolerance need to develope variable species possibly. If these improvements occur, utilization and amenity of subway stationis will increase, according to the use of interior landscape.