• The Bulletin of The Korean Astronomical Society
• /
• 제45권1호
• /
• pp.46.3-47
• /
• 2020

Variations in the brightness of asteroids are caused by their spins, irregular shapes and companions. Thus, in principle, the spin state and shape model of a single object or, a combined model of spins, shapes and mutual orbit of a multiple components can be constructed from the analysis of light curves obtained from the time-series photometry. Using ground- and space-based facilities, a number of time-series photometric observations of asteroids have been conducted to find the possible causes of their light variations. Nonetheless, only about 2% of the known asteroids have been confirmed for their rotation periods. Therefore, a follow-on systematic photometric survey of asteroids is essential. We started an asteroid light curve survey for this purpose using Korea Microlensing Telescope Network (KMTNet) during 199 nights between the second half of 2019 and the first half of 2020. We monitored within a 2° × 14° region of the sky per each night with 25 min cadences. In order to observe as many asteroids as possible with a single exposure, we mostly focus on the ecliptic plane. In our survey, 25,925 asteroids were observed and about 8,000 of them were confirmed for their rotation periods. In addition, using KMTNet's 24-hour continuous monitoring, we collected many composite light curves of slow rotating asteroids that were rarely obtained with previous observations. In this presentation, we will introduce the typical light curves of asteroids obtained from our survey and present a statistical analysis of spin states and shapes of the asteroids from this study.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 한국정보통신학회 2022년도 추계학술대회
• /
• pp.239-241
• /
• 2022

Currently, in Korea, a multi-seater lane (HOV) and a designated lane system are being implemented to solve traffic congestion. However, in both systems, it is difficult to crack down on cases of violations without permission, so people are required to be assigned to areas that want to crack down. In this process, manpower and budget are inefficiently consumed. To compensate for these shortcomings, we propose the development of an integrated enforcement system through YOLO, a deep learning object recognition model. If the two systems are implemented and integrated using YOLO, they will have advantages in terms of manpower and budget over existing systems because only data learning and system maintenance are considered. In addition, in the case of violations in which it is difficult for the existing unmanned system to crack down, the effect of increasing the crackdown rate through continuous learning can be expected.

• Journal of Internet of Things and Convergence
• /
• 제10권2호
• /
• pp.25-41
• /
• 2024

For the scenario of open pit mining, at present, manual periodic verification is mainly carried out in China with the help of video surveillance, which requires continuous investment in labor cost and has poor timeliness. In order to solve this difficult problem of early warning and monitoring, this paper researches a spatialized algorithmic model and designs an early warning system for open-pit mine transboundary mining, which is realized by calculating the coordinate information of the mining and extracting equipments and comparing it with the layer coordinates of the approval range of the mines in real time, so as to realize the determination of the transboundary mining behavior of the mines. By taking the Pingxiang area of Jiangxi Province as the research object, after the field experiment, it shows that the system runs stably and reliably, and verifies that the target tracking accuracy of the system is high, which can effectively improve the early warning capability of the open-pit mines' overstepping the boundary, improve the timeliness and accuracy of mine supervision, and reduce the supervision cost.

• Management & Information Systems Review
• /
• 제36권1호
• /
• pp.115-141
• /
• 2017

This study is to find the key factors of the Internet of Things for development in public sector. In previous studies, it is said that Internet of Things can work digital system without human operation and gives a lot of outputs(information) users. Generally, people are a subject of operating digital system in traditional way, while people are an object on the internet of things. In other words, it is possible to work digital system with only networking from things to things. After all, it is reported that these advantages of the Internet of Things make possible to reduce social costs significantly in public sector. However, despite the strengths of the Internet of Things, there is a specific user acceptance of the technology factor for the Internet of Things rarely. It means that developing of the Internet of Things only focuses on the final purpose. If the focus on development meet this purpose, the user is ignored for the specific reason that using a technique. As a result of this, many users gradually decrease the continuous using of the Internet of Things. Thus, in this study, we need to find what critical factors should reflect to the Internet of Things in public sector. To find this result, there is no choice to use Technology Acceptance Model(TAM). Many researchers have proved that Technology Acceptance Model is valid through the four process in model introduction, confirmation, expansion and refinement from 1986 to 2003. The results of this study showed that the result explanatory power of Internet of Things in public sector is the most important factor affecting only perceived social usefulness and ease of use. Finally, it can be seen that the user has a positive attitude toward use, which has a positive effect on the intention to use continuously. The implications of this study are summarized as follows: When the public Internet of Things service is provided, it means that the user can easily understand the result, and when the person and the object communicate the result to each other, they should be able to communicate with each other. This means that a lot of user effort is needed to understand the outcome of the public Internet of Things being provided.

• Journal of East-West Nursing Research
• /
• 제7권1호
• /
• pp.18-31
• /
• 2002

This study, as a basic research to manage a Chinese Medicine Health Promotion Center by way of showing an example, is a before and after experiment research for simple group to verify a difference with cholesterol, health status and perception of health in order to confirm a effectiveness of diet and regimen according to the 4th status of physical constitution. Research object was chosen of 42 persons who operate a physical constitutional dietary regimen among them after selecting professors and clinical nurses (55 persons) majoring in the science of nursing who participated in Chinese Medicine-oriented Nurse Training Course from Aug. of 2001 to Feb. of 2002 all over the country. Diagnostic tools for physical constitution was used of the questionary that is currently consisted of physical constitution grouping test in Eastern & Western Diagnose Center of K Medical Center, and rating of health status was used of the tool that standardized CMI(Cornell Medical Index) to be available for Korean, and perception measurement for health status was used of a visual analogue scale for the health status that each one perceive personally, and physiological status was measured of cholesterol in blood. Analysis for the collected data was carried out by percentage, $X^2$ test, paired t-test according to research object by using SPSS, and the results of this study are as follows. 1) There was no difference with cholesterol before or after the experiment for objects. As a result of estimation about difference with health status by areas before or after the experiment, there are more improved result in eyes, ears, digestive organs, bones and sinews organs, frequency of a disorder, habit, adaptation status, angry, healthy status than before the experiment. As a whole, after the experiment the health was more improved than before the experiment. As the result to inspect a difference of health perception between before and after experiment, after the experiment the health perception level was improved than before, however there was no meaningful differences. 2) As the result to inspect a difference of cholesterol between before and after experiment according to object's physical constitution, in the case of So-yang-in(a person with the minimum male: according to the male and female principles(the sun and the moon)) among the 4th status of physical constitution there was only meaningful difference statistically, however, after the experiment their cholesterol's value was increased. As the result to inspect the difference of health status between before and after the experiment according to physical constitution, all of Ta-um-in(a person with maximum the female), So-yang-in(with the minimum male), So-um-in(with the minimum female) had a meaningful difference before and after the experiment, which means that in all case by physical constitutional groups, after the experiment their health status was more improved than before the experiment. As the result to inspect a difference of health perception between before and after according to physical constitutions, in the case of Tae-um-in and So-um-in, average score after the experiment was risen than before the experiment so that it means that the level of health perception was improved, however, there was no meaning statistically. According to the above results, if continuous diet and regimen by each physical constitutions could be implemented, it is certain that the health could be maintained and promoted. And, what we are healthy is for oneself to feel it subjectively. However, I think that cholesterol score in blood that we can view objectively could be changed distinctly if we can implement a strict diet and regimen. Accordingly, it is necessary for a method and period of experiment to be more strict and longer. According to the above results, I would like to suggest as follows. 1) In order to understand health status by Korean's physical constitutions and to generalize it, these research will be repeated against much more objects that could be selected by proper grouping method to consider a representative. 2) It is necessary for a research to inspect health status by physical constitution by developing a health status measurement tool that has higher confidence and propriety based on physical constitutional theory.

• Korean Journal of Environmental Agriculture
• /
• 제28권1호
• /
• pp.9-14
• /
• 2009

Applying livestock manure compost to soil can enhance soil fertility and crop productivity. However, little information is available on the effect of continuous application of manure compost on crop growth in Korea. The object of this study was to investigate the residual and continuous application effect of chicken manure compost on chinese cabbage yield and soil chemical properties. The experiment was conducted in the pot ($0.5\;m^2$) without bottom buried in the soil and set up in a completely randomized design with three replication. The treatment consists of chemical fertilizer with nitrogen (NPK, $N-P_{2}O_{5}-K_{2}O$ 320-78-198 kg/ha) and without nitrogen (PK, $N-P_{2}O_{5}-K_{2}O$ 0-78-198 kg/ha), and chicken manure compost at a rate corresponding to 320 (COM1) and 640 (COM2) kg N/ha. This experiment was carried out for three cropping seasons with chinese cabbage. Chemical fertilizer, NPK and PK, was applied every cropping season. In the first cropping season, compost was applied in nine pots (COM-A). In the second cropping season, compost was applied in the six pots of COM-A (COM-AA) and in three pots of COM-A compost was not applied (COM-AN). In next cropping season, compost was applied in the three pots of COM-AA (COM-AAA) and in the other three pots of COM-AA compost was not applied (COM-AAN). COM-AN pots remained without compost application in the third cropping season (COM-ANN). Yields of chinese cabbage of COM1-AAA and COM2-AAA were reached 78 and 96% as compared with NPK, and nitrogen utilization rate was about 85% (COM1-AAA) and 97% (COM2-AAA) as compared with NPK Residual N uptake rates during the second and third cropping season after compost application at the first cropping season were 49.7 (COM1-AN) and 35.6% (COM1-ANN) in COM1, and 56.9 (COM2-AN) and 37.4% (COM2-ANN) in COM2 compared with NPK treatment After three cropping seasons, soil pH and contents of available phosphorus, exchangeable potassium and soil organic matter were increased with continuous application of chicken manure compost.

• Journal of Veterinary Clinics
• /
• 제27권4호
• /
• pp.348-365
• /
• 2010

Artemisia capillaries THUNB is a perennial herb that belongs to the family compositae spp. and the most common plant among the various herbal folk remedies used in treatment of abdominal pain, hepatitis, chronic liver disease, jaundice and coughing in Korea. The object of this study is to observe the dosage-dependent anti-obestic effects of an aqueous extracts of dried aqueous extracts of stems of Artemisia capillaris Thunberg. [Artemisiae capillaris Herba, In-Jin in Korean, INJ] on 45%/Kcal high fat diet (HFD) supplied mice. 45%/Kcal rodent HFD are supplied to ICR mice from 1 week before initiation of INJ administration throughout the 12 weeks, and after the end of 12 weeks of 62.5, 125 and 250 mg/kg/day of INJ administration, the efficacy was divided into five categories 1) hypoglycemic, 2) hepato-protective, 3) nephroprotective, 4) hypolipemic, and 5) anti- obesity effects. The effects were compared to those of simvastatin (for hypolipemic activity), silymarin (for hepatoprotective and free radical scavenger effects) and metformin (for hypoglycemic and related anti-obesity effects). 7 animals per group (8 groups; total 56adapted mice on HFD were selected base on the body weight at 6 days after initiation of HFD supply) were used in this experiment. INJ and all three different reference drugs were directly suspended or dissolved in distilled water, and administered at a volume of 10 mL/kg, once a day for 84 days from 1 week after HFD supply. As results of 91 days of continuous HFD supply, mice showed marked obese states, hyperglycemia, hyperlipemia, liver damages and kidney damages. These mean the obesity, diabetes, diabetic hepatopathies, nephropathies and hyperlipemia were induced by HFD supply. After end of 84 days of continuous treatment of three different dosages of INJ, all diabetes related complications were inhibited; relatively favorable anti-obesity, hypolipemic, hepatoprotective, hypoglycemic and nephroprotective effects. These favorable effects showed relatively good dose-relations between all three different dosages of INJ treated, and INJ 250 mg/kg showed enough favorable effects on diabetes and related four complications tested as compared with one of each three different references. Otherwise, the efficacy of 62.5 and 125 mg/kg of INJ was somewhat slighter than those of all three reference drugs. Therefore, the suitable effective dosage of INJ is considered as 250 mg/kg/day in the present study. The overall anti-obesity effects of INJ 250 mg/kg-treated group was similar or more favorable than those of metformin 250 mg/kg-treated group, and INJ 250 mg/kg showed slighter hypoglycemic effects with silymarin 100 mg/kg and metformin 250 mg/kg, similar hypolipemic effects with simvastatin 10 mg/kg, and similar hepatoprotective effects with silymarin 100 mg/kg, and similar nephroprotective effects with that of silymarin 100 mg/kg and metformin 250 mg/kg, respectively. Obese, hyperglycemia, hyperlipemia, steatohepatitis and related nephropathies induced by HFD supply were dramatically inhibited by 84 days of continuous treatment of all three different dosages of INJ. It is, therefore expected that INJ extracts will be a favorable alternative agent for diet-related diabetes and complications.

• The Korean Journal of Physiology
• /
• 제8권2호
• /
• pp.67-74
• /
• 1974

The object of this research is aimed to determine the activity of adenyl cyclase in both skeletal muscle sarcolemma and fat cell ghost of epididymal adipose tissue isolated from rats exposed to cold for various length of time in an attempt to evaluate whether the tissue sensitivity to catecholamine is increased when rats are exposed to cold for long periods of time Methods: a)Animals: Albino rats ranging in weight from 150 to 200 gm were used throughout this study. For experimental purposes, the rats are divided into two groups: experimental animals were place4 in a cold room at $4^{\circ}C$, controls being kept at $25^{\circ}C$. At the end of 2, 4, 6, 12, and 16 weeks. exposure to cold the rats were used to measure the adenyl cyclase activity. b) Isolation of plasma membrane from skeletal muscle and adipose tissue: The Plasma membrane of skeletal muscle from hind limbs of rats are prepared by the method employed by Rosenthal et at. and fat cell ghost of epididymal adipose tissue of rats by the method employed by Rodbell. c) Adenyl cyclase assay: Adenyl cyclase activity were measured by the method employed by Marinetti et al. Briefly, plasma membrane was incubated with $3^H-ATP$, various amount of noradrenaline and other incubation mixture at $37^{\circ}C$ for 20 minutes. After stopping the enzyme reaction by immersion in boiling water, carrier 3',5'-AMP was added to the system as a marker and $100\;{\mu}1$ aliquots of incubation mixture were pipetted on $20{\time}20$ Whatman No. 3 MM filter paper for one dimensional chromatography. The cyclic AMP spots were cut off and placed in counting vials containing 10ml of Bray's scintillation cocktail. Radioactivity was determined with a Packard Tri-Carb liquid scintillation counter. The enzyme activity is expressed as nanomoles of cyclic AMP produced per mg of membrane per hour. Result: 1. Average adenyl cyclase activity in the plasma membrane of skeletal muscle before and after noradrenaline administration was significantly higher in the cold-exposed rats as compared to the control. Continuous exposure to cold Produced an increased adenyl cyclase activity before and after noradrenaline administration. Adenyl cyclase activity reached peak levels at the 6 weeks exposure to told and level of adenyl cyclase activity remained high. Noradrenaline administration to the incubation medium induced a significant increase in adenyl cyclase activity and the degree of stimulation were proportional to the hormonal concentration But the rate of inclement in adenyl cyclase activity by noradreasline was the same in both groups. 2. Adenyl cyclase activity in fat cell ghost between cold exposed and control rats showed no significant differences before and after noradreualine administration. In summary, it can be concluded that cold adaptation give rise an increased activity of adenyl cyclase in plasma membrane of skeletal muscle in rats.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• 제49권3호
• /
• pp.51-59
• /
• 2012

This paper suggests an efficient method which tracks articulated human body modeled with markov network using disparity map derived from stereo images. The conventional methods which only use color information to calculate likelihood for energy function tend to fail when background has same colors with objects or appearances of object are changed during the movement. In this paper, we present a method evaluating likelihood with both disparity information and color information to find human body parts. Since the human body part are cylinder projected to rectangles in 2D image plane, we use the properties of distribution of disparity of those rectangles that do not have discontinuous distribution. In addition to that we suggest a conditional-messages-update that is able to reduce unnecessary message update of belief propagation. Since the message update has comprised over 80% of the whole computation in belief propagation, the conditional-message-update yields 9~45% of improvements of computational time. Furthermore, we also propose an another speed up method called three dimensional dynamic models assumed the body motion is continuous. The experiment results show that the proposed method reduces the computational time as well as it increases tracking accuracy.

• Journal of the Korean Society for Marine Environment & Energy
• /
• 제16권1호
• /
• pp.1-8
• /
• 2013

This study focuses on a ship detection and tracking method using Frequency Modulated Continuous Wave (FMCW) radar used for horizontal surveillance. In general, FMCW radar can play an important role in maritime surveillance, because it has many advantages such as low warm-up time, low power consumption, and its all weather performance. In this paper, we introduce an effective method for data and signal processing of ship's detecting and tracking using the X-band radar. Ships information was extracted using an image-based processing method such as the land masking and morphological filtering with a threshold for a cycle data merged from raw data (spoke data). After that, ships was tracked using search-window that is ship's expected rectangle area in the next frame considering expected maximum speed (19 kts) and interval time (5 sec). By using this method, the tracking results for most of the moving object tracking was successful and those results were compared with AIS (Automatic Identification System) for ships position. Therefore, it can be said that the practical application of this detection and tracking method using FMCW radar improve the maritime safety as well as expand the surveillance coverage cost-effectively. Algorithm improvements are required for an enhancement of small ship detection and tracking technique in the future.