• Proceedings of the KIPE Conference
• /
• 2016.07a
• /
• pp.213-214
• /
• 2016

중요부하를 갖는 ESS용 인버터는 정전 발생 시에도 부하에 안정적인 전원을 공급해야 한다. 이를 위하여 모드전환 시 과도상태를 최소화하면서 clearing time에도 부하에 안정적인 전압을 공급할 수 있는 간접전류제어 기법이 연구된 바 있다. 그러나 계통연계 시에도 전압을 제어해주기 때문에 단독운전 시 NDZ을 벗어나지 않아, 기존 알고리즘으로는 단독운전을 검출하기 어렵다는 문제가 있다. 본 논문에서는 모드 전환 시 과도상태를 최소화하면서 단독운전 검출 전에도 부하 전압을 안정하게 제어할 수 있는 간접전류제어 기반 인버터에서 NDZ이 없는 무효전력 P&O 단독운전 검출 기법을 제안한다.

• The Transactions of the Korean Institute of Electrical Engineers A
• /
• v.52 no.5
• /
• pp.271-278
• /
• 2003

Power system stability is correlated with system structure, disturbances and operating conditions, and power flows on transmission lines are closely related with those conditions. This paper proposes a methodology to identify correlative power flows for power system transient and small-signal stability prediction. In transient stability sense, the Critical Clearing Time is used to select some dominant contingencies, and Transient Stability Prediction index is proposed for the quantitative comparison. For small-signal stability, this paper discusses a methodology to identify crucial transmission lines for stability Prediction by introducing a sensitivity factor based on eigenvalue sensitivity technique. On-line monitoring of the selected lines enables to predict system stability in real-time. Also, a Procedure to make a priority list of monitored transmission lines is proposed. The procedure is applied to a test system and the KEPCO systems in the year of 2003 and it shows capabilities of the proposed method

• Korean Journal of Pharmacognosy
• /
• v.32 no.4 s.127
• /
• pp.287-291
• /
• 2001

The Radix of Gentiana macrophylla (Gentianaceae) has been used for dispelling wind-damp, relaxing the sinews, and clearing heat from deficiency. In order to evaluate its quality, the method for the quantitative determination of gentiopicroside as standard compound has been developed. Gentiopicroside was a major compound of Gentianae Macrophyllae Radix. It was analyzed by HPLC using 30% MeOH as a solvent system. The amount of gentiopicroside from Gentianae Macrophyllae Radix was in the range of $2.22{\pm}1.22%\;(n=18)$.

• Journal of the Korean Society of Hazard Mitigation
• /
• v.7 no.5
• /
• pp.159-166
• /
• 2007

Large scale flood disasters bring human losses and properties, which lead to the decrease of our productive value and change social environment. Human loss and economic damage are considered to be the same system but they are viewed as separated systems. The total amount of human loss can be represented as the total amount of economic damage estimated in the frame of social system while it will be possible to make mutual changing by clearing the relations between social and economic systems. In this regard, an attempt to estimate economic loss considering per capita Gross Domestic Production (GDP) caused by flood-related mortality was carried out to the typhoon Rusa of 2002 in Kangwon-do. The proposed method tried to capture quantitative factors which are affecting the loss of per capita GDP. The approach has great importance not only to set up governmental policy but also methodological progress in the research due to impact of disaster-related mortality on GDP loss.

• The Korea Journal of Herbology
• /
• v.27 no.2
• /
• pp.31-36
• /
• 2012

Objective : For the purpose of making use the wild edible plants of Ulleung island smoothly, this study was designed. Method : For the first time, I searched the wild edible plants of Ulleung island from various data. And I examined herbological books and research papers on the wild edible plants of Ulleung island. Result : The herbaceous plants in Ulleung island were 12 family and 22 species, Compositae and Liliaceae plants take the highest number of them. The woody plants in Ulleung island were 1 family(Araliaceae) and 2 species. The herbal medicines that originated from the wild edible greens of Ulleung island were 25 species. The herbal medicines that have the effects of clearing away heat(淸熱), eliminating toxin(解毒), subduing swelling(消腫) and promoting blood circulation to remove blood stasis(活血祛瘀) take the highest number of the effects of these herbal medicines. Conclusion : For the purpose of making use the wild edible plants of Ulleung island smoothly, we should recognize not only medical benefits but also matters that pay special attention.

• Journal of Institute of Control, Robotics and Systems
• /
• v.9 no.9
• /
• pp.727-735
• /
• 2003

The determination of completion time constitutes an important step in developing algorithms for short-term production scheduling. Existing completion time algorithms of multi-product batch processes often assume that intermediate storage tanks are always available when it is needed. In this paper, we consider a serial multi-product batch plants with ZW and NIS policy intermediate storge tank. We limit storage residence time and allocated products in the intermediate storage tank to minimize the quality change of the stored material as well as to reduce the clearing time during product change. A set of recurrence relations is suggested to calculate the completion times for the given batch sequence of products on all processing units. Also analytic solution for the suggested model is solved by a graphical method. The effectiveness of these results is proved by a few illustrative examples.

• Journal of Haehwa Medicine
• /
• v.11 no.1
• /
• pp.91-101
• /
• 2002

According to the literature on the, the results were as follows. 1. The mechanism of External therapy for prostatitis is some medicicne to come into prostate have anti-inframation and the other medicine to come into nerve system control pain. 2. For the method are uesed hip bath, enema and sticking the pacth to the umbilicus etc. 3. For the medicine are used safflower(紅花), patrinia(敗醫草), chrysanthemum flower(菊花) and Cortex Phellodendri(黃栢). nature and flavor of the medicine is almost cold, bitter in taste and hot in taste. 4. For the classification of medicine are used drug to induce diuresis to elominate stranguria(利尿通淋藥) and drug to induce diuresis to dispersing swelling(利水退腫藥). sometimes they are used to Heat-clearing and detoxifying drug(淸熱解毒藥) and blood-quickening aget(活血祛瘀藥).

• International Commerce and Information Review
• /
• v.10 no.1
• /
• pp.139-154
• /
• 2008

This research want to discuss some issues about payment system of America. This research focuses on comparing ACH with Fedwire. Firstly Fedwire is the payment system for only large-dollar transfer(Large-Value Transfer System; LVTS), while ACH(Automated Clearing House)payment mainly applies a consumer account. Secondly ACH transaction is either credit or debit transfer, while Fedwire is only credit transfer. Thirdly the communication system of Fedwire has twoway method, telephonelike communication network, but ACH is oneway store and forward electronic mail. At present LVTS divides into RTGS(Real-Time Gross Settlement) and DNS(Deferred Net Settlement). However Fedwire uses either RTGS(instantaneous for every transaction) or DNS(net net transaction) but ACH uses only DNS(net net transaction). Fourthly ACH is substantially cheaper than the Fedwire payment. lastly security is important in both Fedwire and ACH, it is even more crucial in Fedwire In addition, for each transaction, Fedwire may entail individual instantaneous confirmation to the originator and notification to the receiver, whereas ACH do not.

• Journal of Korea Multimedia Society
• /
• v.21 no.3
• /
• pp.423-431
• /
• 2018

In this paper, we try to verify a normative module based house design procedure consisted of several sequential steps. The first step is to suggest formalization of designing so that we could clarify each phase and operation we are adopting in our design process. The second step is the clearing up the conceptual schema of traditional skills that we adopt and utilize from traditional Hanok framing techniques. The third step is to formulate adequate modular kits for the assembly of house design solutions for the schematic, conceptual and preliminary phases of designing. The fourth step is to implementing our ideas and methods to a proper computational platform such as Unity3D. The final step is to verify our symbolic descriptions of design formalization with the output of our experiments so that we have better understanding of design reasoning characteristics such as in house design.

• Journal of Haehwa Medicine
• /
• v.10 no.1
• /
• pp.47-53
• /
• 2001

In the result of investigating traditional chinese medical literatures to understand drug-processing about Pyritum, we could reach conclusions as follows: 1. Pyritum are divided into fresh Pyritum, calcining Pyritum, tempered Pyritum with vinegar by methods of drug-processing. 2. The methods of drug-procession about Pyritum like calcination, quenching, refining drugs with water or medicinal broth of Glycyrrhizae Radix(licorice), boiling with medicinal broth of Glycyrrhizae Radix(licorice) were used complicately. 3. Calcining Pyritum are grinded easily, convenient to apply a pill and powder and As, S are easily removed. Quenching Pyritum act on liver channel and then are reinforced the effects of relieving blood stasis, Pain and gushed out effecive ingredients. Refining Pyritum with water are reinforced the effect of tranquilizing the mind and clearing heat. above results indicates that using calcination, quenching and refining drugs with water together is the best method of drug-processing about Pyritum.