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Lee, Subin,Alkathiri, Badriah,Kwak, Dongmi,Lee, Sang-Myeong,Lee, Wan-Kyu,Byun, Jae-Won,Lee, Seung-Hun The Korea Society for Parasitology and Tropical Me 2022 The Korean Journal of Parasitology Vol.60 No.3
This study aimed to examine the distribution of gastrointestinal parasitic infections in domestic pigs in the Republic of Korea. From May 2020 to October 2021, 364 pig fecal samples were collected from 75 farms in 7 Provinces and microscopically examined. A total of 170 (46.7%) pigs were infected with at least one of the following parasites: Balantioides coli, strongyles, Ascaris suum, Trichuris suis, and coccidia. By parasite species, B. coli, strongyles, A. suum, T. suis, and coccidia oocysts or eggs were detected in 144 (39.6%), 24 (6.6%), 14 (3.8%), 4 (1.1%), and 1 (0.3%) samples, respectively. One hundred fifty-four, 15, and 1 cases showed single, double, and triple infections, respectively. Of the swine fecal samples from 75 farms, 69 specimens (92.0%) were infected with 1 or more parasites. All surveyed farms across the country exhibited a positive rate of over 30%, among which the highest positive rate was 65.0% in Chungcheongnamdo, and Jeollabuk-do was followed by 61.9%. Winter showed a statistically lower prevalence than other seasons. This study showed that gastrointestinal parasites are prevalent in pigs in Korea, although the diversity of parasites is low.
SuBin Lee,YuJin Jung,SueRan Choi 한국색채학회 2017 AIC 2017 Jeju Vol.2017 No.10
The color of the exterior wall of the apartment and the complex is an important factor that greatly influences the visual image of regions, as well as cities of our country. However, the color of a relatively large number of brand apartments is dominant and there are many partial color schemes that do not take the overall harmony with the surrounding landscape, mountains, and rivers into consideration for the color of the exterior walls of apartments with uncertain regional and landscape identity. Although Sangye Byeoksan Apartment is surrounded by Mt. Buram and is in a railway station sphere incorporating a modern commercial complex, its image is somewhat negative because of the dark surroundings. Therefore, this study was performed to enhance Byeoksan Apartment’s identity through the use of nature-friendly color arrangement by investigating and analyzing the color of the objects of the surrounding natural environment and landscape. As a result of analyzing the colors of the target area, it was possible to extract various tones and colors from Mt. Buram, which is a relatively outside, rather than inside view. We proposed the apartment exterior wall color scheme by arranging extracted colors with dominant color, auxiliary color, and highlight color.
A Branch and Bound Algorithm for Globally Optimal Photometric Stereo Using Color Image Inputs
Subin Lee,Hyunjung Lee,Yongduek Seo 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.6
This paper proposes a branch-and-bound(BnB) global optimization algorithm to compute the shape and the albedo of the object surface when the measurements consist of color images. It is difficult to find the global solution for a photometric stereo problem because the error function of surface albedo and normal is highly non-linear and non-convex. The BnB algorithm is developed to enable the efficient global search over a non-convex space. We adopted the BnB algorithm to the photometric stereo problem with multi-channel input. The L2-norm errors are minimized for which three ingredients are devised: 1) an appropriate scheme of representation and sub-division of the search domain, 2) a feasibility problem given a sub-domain, and 3) a solution method to solve the problem. Experimental results of synthetic and real data are also presented to qualify our method. We evaluated the relative performance of the BnB algorithm compared to the Newton's method as local optimization.
Investigation of ITU Radio Regulations Regarding KPS Service Band
Subin Lee,Kahee Han,Jong-Hoon Won 사단법인 항법시스템학회 2023 Journal of Positioning, Navigation, and Timing Vol.12 No.2
In order to reserve frequency bands for stable operation of the Korean Positioning System (KPS), it must be demonstrated that the impact of interference caused by KPS on other services operating in the same bands is tolerable. The International Telecommunication Union (ITU) provides the radio regulations and a compatibility assessment methodology for the coexistence of different services in limited frequency resources. The purpose of this paper is to investigate the radio regulations regarding the compatibility issues between the KPS and other services sharing the same frequency bands. The results of the investigation show that the RNSS system can be operated in the L5-band under the condition that the Power Flux Density (PFD) and Aggregated Equivalent PFD (AEPFD) thresholds specified in the radio regulations are met. In addition, the ITU recommends that the interference-to-noise ratio (INR) protection criteria be met to prevent degradation of the performance of radar systems operating in the L2/L6-band. In the case of the S-band, coordination of allocations for RDSS space stations with respect to terrestrial services is not required if the PFD does not exceed regulated thresholds regulated by ITU.