• Journal of Engineering Education Research
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• v.13 no.6
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• pp.171-179
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• 2010

In this paper, we describe a case study of a new lab. project that improves efficiency for education and interest on learning in image processing and pattern recognition related subjects by using LEGO Mindstorms. In addition we verify the validity with analysis of the practical application. LEGO Mindstorms is already used in many educational institution of several countries since about 10 years ago and various case studies have been published. The use of LEGO Mindstorms is generally positive but the negative comments about this exist. The main cause of negative opinion is from unpredictability. The unpredictability from mainly analog characteristics of robot can degrade the effective learning. The describing lab. project suppresses occurrence of unpredictability by minimizing dependence on robots. Students can concentrate on learning the related algorithms by minimizing the learning content and further consideration.

• Journal of Internet Computing and Services
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• v.18 no.5
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• pp.95-102
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• 2017

With the development and popularization of Internet, the competition of SNS market is now getting fiercer and fiercer. SNS service providers need to keep updating their service to sustain their customers' continuance use. However, due to the homogenization of functions and services from different applications provided by different developers, there comes a new phenomenon that users shift from one SNS to another SNS. In line with this, the current study aims to explore factors affecting switching intention among SNS users by applying migration theory which explains people's migration behavior from one place to another. Findings from surveys of Korean and Chinese college students suggest that there was a difference of factors influencing switching intention among the two countries. For Korean college students, alternative attraction was the strongest factor leading to SNS switching intention. On the other hand, peer pressure was the strongest factor leading to SNS switching intention among Chinese college students.

• Journal of Sensor Science and Technology
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• v.11 no.3
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• pp.132-137
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• 2002

The single crystal of $LiTaO_3$ ($x-112^{\circ}$ y) has very stable thermal characteristics in a piezoelectric transformer. In this paper, a piezoelectric transformer made of the crystal is newly designed and its operating characteristics are analyzed. The length of the transformer is determined as twice as its width for Lame'-mode because the single crystal of $LiTaO_3$ has low electro-acoustic efficiency. The electric and vibrational characteristics of the transformer is simulated by the PSpice program, and its results are compared to experimental ones. As the results, the ratio of output voltage to input shows large than 10 at 290.83[kHz], which is the frequency coupled the 2nd harmonic for length and the fundamental for width of the Lame'-mode transformer.

• Journal of Sensor Science and Technology
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• v.23 no.2
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• pp.110-113
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• 2014

In this paper, we propose and demonstrate a Fabry-Perot interferometer (FPI) optical fiber tip sensor fabricated by a blade-sawing technique using a fiber optic patch cord for high-resolution temperature measurement. The sensor head consists of a short air FP cavity near the tip of a single-mode fiber patch cord tip. The temperature which we can measure is determined through a phase variation of the interference fringes in the reflective spectrum of the sensor. The fiber optic FPI sensor in this work can monitor the environmental temperature very accurately from 40 to $120^{\circ}C$. As a result, the temperature sensitivity is obtained as $38.2pm/^{\circ}C$.

• Journal of Internet Computing and Services
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• v.18 no.6
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• pp.93-100
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• 2017

In multi-media, multi-channel era, video viewing using various digital devices via the Internet, not the existing broadcasting network, is emerging as a new broadcasting viewing behavior. OTT service is regarded as the main service of this change of viewing behavior. It is a video service that can seamlessly use any content desired by the user at any time, at any time, any device, any contents, if the Internet connection is available. The purpose of this study is to investigate the factors affecting the satisfaction of OTT service by applying the technology acceptance model (TAM). As a result of analyzing through 303 questionnaires of the early users of OTT service, social pressure, perceived popularity, perceived cost, user reputation, individual innovation, and esthetics set as external factors in this study are partially affects perceived usefulness, perceived ease of use, and perceived enjoyment. In addition, perceived usefulness, ease of use, and enjoyment are directly influencing satisfaction. Based on these results, we discuss the theoretical and practical implications and propose future research direction.

• Journal of fish pathology
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• v.21 no.3
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• pp.229-239
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• 2008

The aim of this study was to acquire level on the occurrence of five fluoroquinolones(FQs) residue among cultured eels in Jeonbuk province. Samples were collected from the four local area(Kunsan, Gochang, Wanju and Osu) and surveyed on the distribution of FQs residual level in edible muscle using HPLC method. A total of 90 samples of eel was monitored for detection of the FQs residue. Among them, 30 eels(33.3%) were detected the FQs single or paired, respectively. The detection ratios were showed Osu(40%, 8/20), Gochang(33%, 13/44), Wanju(30%, 6/20) and Kunsan(30%, 3/10) in order, respectively. The ratio was equivalent to over 30% of overall in sampled area. The most frequently detected FQs were perfloxacin(PF) followed by enrofloxacin(EF), ciprofloxacin(CF), ofloxacin(OF) and norfloxacin(NF). Eight different combinations of FQ residual patterns were observed as single(5 type, 21%) or as paired(3type, 12,5%) respectively and frequently encountered patterns were PF(37%) and PF-EF(23%). The residual level of FQs was evaluated in the range of 1-75 ug/kg and the most prevalent levels of FQs was found in 1-25 ug/kg(35 fish, 85%) followed by 26-50 ug/kg(5 fishes, 11%) and 51-75 ug/kg(1 fishes, 3.3%). These results could be possible that the cultured eels were mostly exposed with PF, EF and CF, and might be treated with a variety of fluoroquinolones for prevention of bacterial disease.

• The Korean Journal of Food And Nutrition
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• v.25 no.2
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• pp.246-252
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• 2012

After a mixed carbohydrate diet, inhibition of ${\alpha}$-amylase and ${\alpha}$-glucosidase involved in the digestion and absorption of carbohydrates can significantly decrease the postprandial increase of blood glucose level. In the course of screening these useful enzyme inhibitors, we selected five kinds of bean, using an in-vitro enzyme inhibition assay method. To evaluate the effect of germination process on the functionality of the bean, we investigated the inhibitory activities of the water extracts of non-germinated bean and germinated bean against ${\alpha}$-amylase and ${\alpha}$-glucosidase, relevant to postprandial hyperglycemia. We also investigated the oxygen radical absorbance capacity(ORAC), total phenolics content, and postprandial blood glucose lowering effect in rats(Sprague-Dawley rat model). Most germinated beans showed significantly higher ${\alpha}$-glucosidase inhibitory activity, compared with non-germinated beans. Among germinated beans, Glycine max had the highest ${\alpha}$-glucosidase inhibitory activity(53.3%). The water extract of germinated Phaseolus vulgaris L. had the highest ${\alpha}$-amylase inhibitory activity(95.1%), followed by Glycine max(58.7%), and Glycine max L. Merr(54.1%). Furthermore, the five germinated beans also showed high antioxidant activities in ORAC assay. Results suggested that the germination process may improve and enhance the anti-hyperglycemia potential and antioxidant activity of the bean.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.61-63
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• 2005

Pentacene based OTFT on PC and PES plastic substrates have been fabricated in a scale of 5 inches. We could get a small OTFT device enough to be applicable for AMOLED by acquiring the at least misalignment margin through a contact aligner. And also we could find out the degradation of device parameter through the integration processes and improve the properties by using a buffer layer as an etch stopper in an active patterning. Through these, the mobility of device is more than about $0.2cm^2/Vs$ and $I_{on}/I_{off}$ is higher than $10^5$.

• Clinical and Experimental Reproductive Medicine
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• v.8 no.1
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• pp.1-12
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• 1981

It has been already suggested that specific macromolecules in follicular fluid produced by granulosa cells may play a role in suppressing further meiotic maturation of the oocytes. In general, the search for specific macromolecules in follicular fluid using immunological methods has not been rewarding. These studies were designed, by applying more effective immunological methods than conventionally employed, (l) to identify whether some unknown macromolecules are present in the porcine follicular fluid or not, and (2) to clarify the relationship between the oocytes and the specific macromolecules in the follicular fluid. The results obtained were as follows; (1) porcine follicular fluid contained two specific proteins, which were not present in pig plasma and serum. (2) each of two proteins showed electrophoretically fast alpha-globulin and beta-globulin mobilities. (3) these proteins seemed to have inhibitory effect on the maturation of mouse oocytes in vitro. From these results, it can be assumed that pig follicular fluid contains specific proteins which seem to be intra-follicular inhibitor(s) of oocyte maturation.

• Journal of Korean Society on Water Environment
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• v.31 no.5
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• pp.569-575
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• 2015

The current Total Pollution Load Control (TPLC) sets the Target Water Quality (TWQ) by utilizing the delivery ratio, unit loads, and water quality modeling, it also allocates the watershed's permitted discharge load. Currently, common target pollutants of every unit watershed in TPLC are BOD and T-P. This study has reviewed the 1th and 2th of TWQ setting process for the Nakdong River 3th TWQ setting in Total Pollution Load Control (TPLC). As a result of review, 1th and 2th were divided into one management basin (mulgeum) for setting management goals. However, 3th was divided into six management basins (mulgeum, gnagjeong, geumho river, nam river, miryang river, end of nakdong river). The principle of management goal setting were to achieve the objective criteria of Medium Areas for the linkage of the water environment management policy. And Anti-Degredation (principle of preventing deterioration) were applied to the 3th TWQ. Also, additional indicators were considered in accordance with the reduction scenarios for the final management goals.