• Journal of The Korean Astronomical Society
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• v.36 no.3
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• pp.177-187
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• 2003

Active galactic nuclei (AGNs) are distant, powerful sources of radiation over the entire electromagnetic spectrum, from radio waves to gamma-rays. There is much evidence that they are driven by gravitational accretion of stars, dust, and gas, onto central massive black holes (MBHs) imprisoning anywhere from $\~$1 to $\~$10,000 million solar masses; such objects may naturally form in the centers of galaxies during their normal dynamical evolution. A small fraction of AGNs, of the radio-loud type (RLAGNs), are somehow able to generate powerful synchrotron-emitting structures (cores, jets, lobes) with sizes ranging from pc to Mpc. A brief summary of AGN observations and theories is given, with an emphasis on RLAGNs. Preliminary results from the imaging of 10000 extragalactic radio sources observed in the MITVLA snapshot survey, and from a new analytic theory of the time-variable power output from Kerr black hole magnetospheres, are presented. To better understand the complex physical processes within the central engines of AGNs, it is important to confront the observations with theories, from the viewpoint of analyzing the time-variable behaviours of AGNs - which have been recorded over both 'short' human ($10^0-10^9\;s$) and 'long' cosmic ($10^{13} - 10^{17}\;s$) timescales. Some key ingredients of a basic mathematical formalism are outlined, which may help in building detailed Monte-Carlo models of evolving AGN populations; such numerical calculations should be potentially important tools for useful interpretation of the large amounts of statistical data now publicly available for both AGNs and RLAGNs.

• YAKHAK HOEJI
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• v.57 no.6
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• pp.432-441
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• 2013

It's been almost 20 years since the adoption of Good Manufacturing Practices (GMP) in Korea since 1994. There have been big progresses in the GMP regulations and its implementations. 'New GMP' in 2008 has adopted validation, pre-approval GMP evaluation, annual quality review, etc.. Upon the submission of PIC/S (Pharmaceutical Inspection Cooperation Scheme) application by Korea's Ministry of Food and Drug Safety in April, 2012, Korea is facing new opportunity to level up Korea GMP regulations. As such, this study suggested GMP revision points by comparing and analyzing the differences between PIC/S GMP and Korea GMP. Those areas which GMP is not required such as radiopharmaceuticals and medical gases should adopt GMP. And independent GMP regulation is needed for Active Pharmaceutical Ingredients and investigational medicinal products. Also, those regulations shall be implemented in the higher level of legal status. Finally, rather than pursuing GMP harmonization only for PIC/S membership, GMP improvement in the long term shall be taken into consideration by reflecting current quality issues such as ICH Q8 (Pharmaceutical development), Q9 (Quality Risk Management) and Q10 (Pharmaceutical Quality System).

• Journal of Society of Preventive Korean Medicine
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• v.23 no.3
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• pp.59-70
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• 2019

Objectives : The aim of the research is to study the edible parts and cooking methods for the Korean medicinal plants using documents of Japanese occupation era. Through this study, we expect that it will be used as a basis data on further Korean traditional edible herb. Methods : The research analyze the usage of 74 species of medicinal plants that are listed in the 『Wild Food Plants of Chosen(Korea)』 along with analyzing 8 extra documents about famine relief plants and cooking method written during Japanese occupation. Results : The result shows that the sprouts and buds are the most popular for the edible purposes but they are never used for medical reason. Roots and fruits take the highest percentage when it comes to medical purposes. Types of medicinal plants that were used a lot of cooking methods were side dishes such as 'Namul, Saengchae, Jangajji'. Conclusions : Using medicinal plants for edible and medical purposes were traditionally familiar with Korean culture but the changes provoked by industrialization forbid the knowledge to pass through. However, recently, the trend of having a healthy life interests people to backtrack this traditional way of using medicinal plants with new purposes. To inherit traditional knowledge and for the future development of Korean traditional ingredients, further research should be conducted.

• Journal of the Korean Institute of Educational Facilities
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• v.26 no.3
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• pp.3-13
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• 2019

Purpose: The human body is a chemical laboratory. Artists are exposed to a variety of chemicals in art studio space and the art materials used in the creation contain toxic ingredients, exposing them to a variety of incurable diseases, including cancer. It aims to analyze the problems of the studio space environment and the risks of art materials, which are fundamental causes of the outbreak of incurable diseases, and to derive the direction of specific practices that can reduce the occurrence of incurable diseases by artists. Method: The harmfulness of an artist's creative space is the cause of a disease outbreak, and two primary factors cause it. One is the environmental hazards caused by the use of tools, air pollution, and chemical hazards caused by art materials in the architectural space environment of the studio. Necessary measures are put forward to control disease outbreaks by identifying the status and cause of intractable diseases caused by studies. Result: The plan is urgent for the establishment of safety rules and regular pre-trainthese two factors and analyzing the results of prior research and implementation investigationing, the legal provisions of studio architecture design and the introduction of labelling rules to control the distribution of harmful art materials.

• Natural Product Sciences
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• v.28 no.1
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• pp.27-32
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• 2022

This study evaluated the general nutritional ingredients such as crude fats, crude ashes, crude proteins, total polyphenols, and total flavonoids in 18 kinds of edible tree sprouts. The tree sprouts of Philadelphus schrenckii, Lycium chinense, and Morus alba had the highest crude fat, crude ash, and crude protein content, respectively. The tree sprouts of Cedrela sinensis (CSS) with high ABTS⁺ radical scavenging activities had a high content of total polyphenols (175.65 mg/g ext.) and total flavonoids (75.18 mg/g ext.). The simultaneous determination of flavonoids such as rutin, isoquercitrin, quercitrin, afzelin, and quercetin in CSS was conducted using high-performance liquid chromatography with a wavelength of 270 nm. Among the flavonoids, the content of quercitrin in CSS was the highest at 59.28 mg/g ext. This study also aids the quality control of many edible tree sprouts by analyzing the general components, total polyphenols, and total flavonoids.

• The Korean Journal of Food & Health Convergence
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• v.9 no.5
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• pp.7-11
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• 2023

Purpose: The purpose of this study is to analyze current trends in the Korean ice cream industry and determine how these trends affect the competitiveness of each ice cream company. Method: This study was conducted by reviewing existing related literature and collecting and analyzing data from news articles, corporate reports, and existing researchers' studies related to the ice cream industry. Results: The Korean ice cream industry is growing and developing through the collaboration of fun marketing with taste, quality, and fun elements, and the young MZ generation can be said to be the main customer base. In terms of quality, premium ice cream made with high-quality domestic ingredients has recently been gaining popularity, and ice cream with reduced fat and sugar, such as plant-based substitutes, is also gaining popularity among consumers. Conclusions and Implications: The results of this study highlight the need for continued innovation in the Korean ice cream industry. The industry must also capitalize on the growth of online sales and the global appeal of Korean pop culture. Sustainability efforts, technology adoption, and strategic collaboration are key drivers for future industry success, and social media engagement must be integrated into marketing strategies to increase brand awareness and consumer loyalty.

• KIPS Transactions on Software and Data Engineering
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• v.11 no.6
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• pp.255-266
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• 2022

The quality control of coarse aggregate among aggregates, which are the main ingredients of concrete, is currently carried out by SPC(Statistical Process Control) method through sampling. We construct a smart factory for manufacturing innovation by changing the quality control of coarse aggregates to inspect the coarse aggregates based on this image by acquired images through the camera instead of the current sieve analysis. First, obtained images were preprocessed, and HED(Hollistically-nested Edge Detection) which is the filter learned by deep learning segment each object. After analyzing each aggregate by image processing the segmentation result, fineness modulus and the aggregate shape rate are determined by analyzing result. The quality of aggregate obtained through the video was examined by calculate fineness modulus and aggregate shape rate and the accuracy of the algorithm was more than 90% accurate compared to that of aggregates through the sieve analysis. Furthermore, the aggregate shape rate could not be examined by conventional methods, but the content of this paper also allowed the measurement of the aggregate shape rate. For the aggregate shape rate, it was verified with the length of models, which showed a difference of ±4.5%. In the case of measuring the length of the aggregate, the algorithm result and actual length of the aggregate showed a ±6% difference. Analyzing the actual three-dimensional data in a two-dimensional video made a difference from the actual data, which requires further research.

• 보존과학연구
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• s.33
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• pp.109-124
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• 2012

Jangan-eup, located in Busan, South Korea,is a famous pottery-producing area in the Joseon Dynasty period. The aim of this paper was to determine the correlation of the pottery from each kiln site of Jangan-eup by analyzing the ingredients of clay as well as its production technique and firing condition. The materials that were used for the study were fragments of inlaid celadon, white porcelain, and white porcelain painted with underglazed iron excavated from six kiln sites of Jangan-eup:Sil-li, Daeryong-li, Hajangan-li, Sangjangan-li, Yongso-li, and Dumyeong-li. In each of the samples from the six kilns, cristobalite, mullite, and quats were found. The firing temperature distinguished from the crystal structure was higher in the following order: Dumyeongli>Sangjangan-li>Daeryong-li>Hajangan-li>Yongso-li>Sil-li. The samples were divided into four groups based on the ingredients of the clayfound therein: the Sil-li andDaeryong-li group, the Hajangan-li and Sangjangan-li group, the Yongso-li group, and the Dumyeong-li group. It was also found that the sample of Dumyeong-li was made using the most homogeneous clay compared with the other samples. The pottery of Jangan-eup had $40-400{\mu}m$ glaze, had bubbles in their bodies, and had $10-150{\mu}m$ sizes.

• Food Science and Preservation
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• v.14 no.4
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• pp.385-393
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• 2007

Much research is conducted on the biological activities of medicinal herbs, traditional plants, and agricultural products, cultivated in Korea. This study focused on optimization of hot-water extraction methods for such products, by analyzing and monitoring extraction characteristics using a response surface methodology. We found that the total phenolics contents, electron-donating abilities, and nitrite-scavenging abilities of extracts were significantly affected both by the solvent used for extraction, and by the nature of the particular herb or plant under study. The extraction efficiencies of valuable ingredients such as alliin, allicin, and total thiosulfinate, were greatly affected by extraction temperature, but not by extraction time or the solvent used. We elicited a regression formula for each variable. We first entered the optimal values of all extraction conditions giving active ingredients into the model. Next, we entered the optimal values of all extraction conditions favoring the retention of valuable antioxidant characteristics. Finally, we entered processing factors into the model. Overall, the optimal extraction was at $80^{\circ}C$ for 3.5 hr with 8.5 ml of solvent/g of sample. The predicted values of each variable were similar to the actual values.

• The Korea Journal of Herbology
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• v.27 no.1
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• pp.17-25
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• 2012

Objectives : The objectives of this study lie in theoretical establishment of formulas for purging five viscera for curing the sthenic syndrome of five viscera through analyzing the component medicines and combination principles of Hyeongok's formulas for purging five viscera, and furthermore, maximizing the clinical use of them. Methods : This study analyzed the component medicines and combination principles of Hyeongok's formulas for purging five viscera based on the theory for properties and tastes of herbal medicines from the "Yellow Emperor's Canon of Internal Medicine", the theory for principal herbal medicine, assistant herbal medicine, adjuvant herbal medicine, dispatcher herbal medicine, and the five elements doctrine. Hyeongok's formulas for purging five viscera are Sagantang, Saseemtang, Sabeetang, Sapyeotang, and Pyeongshintang. Results : There are three methods for curing the sthenic syndrome of five viscera according to the five elements doctrine : in case of Sagantang purging the liver, purging the heart and invigorating the lung ; Saseemtang, purging the heart, purging the spleen and invigorating the kidney ; Sabeetang, purging the spleen, purging the lung and invigorating the liver ; Sapyeotang, purging the lung, purging the kidney and invigorating the heart ; Pyeongshintang, purging the kidney, purging the spleen and invigorating the spleen. Conclusions : First, to cure the sthenic syndrome of five viscera, the methods of purging five viscera, and invigorating five viscera should be used according to the five elements doctrine. Secondly, herbal medicines appropriate for those treatment methods should be chosen according to the theory for properties and tastes of herbal medicine and thirdly, the combination of those herbal medicines should be carried out according to the theory for principal herbal medicine, assistant herbal medicine, adjuvant herbal medicine, dispatcher herbal medicine. As a good example, Hyeongok's formulas for purging five viscera are combined according to the above theories. In conclusion, this formula was created by applying to the theory for properties and tastes of herbal medicines.