• Journal of the Korean Crystal Growth and Crystal Technology
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• v.14 no.2
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• pp.37-46
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• 2004

The electrochemical adsorption of the Ag ions from aqueous solution on pelletized activated carbon monolith was investigated over wide range of operation time. The adsorption capacities of pelletized activated carbon monolith are associated with their internal porosity and are related properties such as surface area, pore size distribution. The chemical industry generates wastewater that contains toxic matters like heavy metals in small concentrations so that their economic recovery is not feasible. But, the method using activated carbon monolith can be used to withdrawal of heavy metals in waste water. After the electrochemical treatment, the quantitative properties in Ag ion solutions are also examined by pH concentration and studied elemental analysis by ICP-Atomic Emission Spectrometer and Energy Disperse X-ray (EDX) spectra. It is consider that the pH is very important factor at the reason of water pollutant with increasing acidity in industrial field. The result of quantitative analysis using Inductively Coupled Plasma-Atomic Emission Spectrometer of metal after electrochemical reaction in Ag ions solution depending on time are shown that the amount of Ag ions deposited was decreased with growth of Ag particles on the carbon surfaces as increasing electrochemically treated time. And, surface morphologies are investigated by scanning electron microscopy (SEM) to explain the changes in adsorption properties.

• Nuclear Engineering and Technology
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• v.24 no.3
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• pp.236-242
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• 1992

The characteristics of dynamic terms in the core overtemperature Delta-T trip function are investigated for various time constants and the effects on the trip setpoint are studied for the uncontrolled RCCA bank withdrawal at power event by using the NLOOP and the PUMA code. Based on this study, a procedure determining the optimal dynamic term is suggested and accordingly the optimum time constants are determined for the KORI 3&4 transition core. It reveals that the vessel average temperature-lead-lag term is the most sensitive in DNB trip setpoint and the optimized time constants are 21 seconds for lead and 4 seconds for lag.

• The Journal of Internal Korean Medicine
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• v.1 no.1
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• pp.92-97
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• 1976

Upon feeding dried Ginseng to rats of either low-protein or high protein diet ethanol was administered intraperitoneally and disappearance rate blood alcohol was enzymatically measure. In terms of residual blood alcohol after a time lapse of 3.5 hours between intraperitonial administration and blood withdrawal neither ginseng nor ginseng plus 40% casein did improve the rate, of alcohol clearance but sexual difference was clearly demonstrated in favor of female rats. In the case of blood withdrawn only 2 hours after intraperitoneal injection of alcohol, the tendency of female superiority in alcohol clearance rate is demonstrated when a comparison is made among the groups fed with ginseng and this was particularly true is groups of rats fed with basal diet plus 1 percent ginseng residual blood ethanol being 15.4 mg/ml vs. 8.8 mg/ml. Liver homogenate alcohol dehydrogenase activity measured in terms of residual ethanol content after in vitro reaction on which a known amount of alcohol was added clearly demonstrated a male superiority in alcohol clearance.

• Korean Journal of Poultry Science
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• v.25 no.3
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• pp.113-118
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• 1998

These experiments were conducted to develope the artificial insemination methods of wild duct (Anas platyhychis platylyachos) . The characteristics of erect phallus and semen collected by the abdominal massage method were investigated in wild duck. The erection and withdrawal time of phallus were 50.70${\pm}$18.66 and 92.58${\pm}$51.95 sec. , respectively, in wild duck. The length, long and short diameter of erect phallus were 3.98${\pm}$0.49crn, 1.53${\pm}$0.15cm and 1.05${\pm}$0.04 cm, respectively, and the spiral grooves of erect phallus were 4 in wild duck. The volume of semen, concentration of spermatozoa and total sperm of an ejaculate were 0.18${\pm}$0.06 ml, 2.84${\pm}$0.03 x 10 9 /ml and 0.52${\pm}$0.21 x 10 cells, respectively, in wild duck. The motility of sperm and pH of semen were 49.06${\pm}$14. 35 and 7.6${\pm}$0.14 in wild duck.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.373-374
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• 2014

본 연구의 목적은 청소년기의 휴대폰 의존의 시간의 흐름에 따른 발달적 변화를 확인하고, 부모 지지 및 사회적 위축과 이러한 변화 사이에 어떠한 종단적 관계가 있는지를 검증하고자 하는 것이다. 이를 위하여 본 연구에서는 한국아동 청소년패널조사(KCYPS) 중학교 1학년 1~3차년도 자료에 대하여 잠재성장모형을 구성하여 이에 대한 실증적 검증을 실시하였다. 분석 결과, 중학교 1학년에서부터 3학년까지 휴대폰 의존 정도는 선형으로 증가하는 패턴을 보였으며, 1차년도의 부모지지는 휴대폰 의존의 초기치에, 그리고 휴대폰 의존 초기치와 변화율은 각각 3차년도의 사회적 위축에 유의한 영향을 미치는 것으로 확인되었다. 이상에서 도출된 연구 결과에 근거하여 청소년기 휴대폰 의존에 대한 예방 및 개입과 관련된 함의가 제시되었다.

• The Journal of Korean Physical Therapy
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• v.26 no.6
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• pp.398-402
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• 2014

Purpose: This study was carried out in order to verify actual applicability of mental practice in the clinical field by applying it to Parkinson disease patients. Methods: : The number of subjects was three and they were aged between 65 and 69. One year or longer period has passed since they were diagnosed with Parkinson disease. The baseline A consisted of three sessions. After the baseline period, the researcher applied mental practice to the subjects once per day, for 20 minutes per each time, for 10 sessions. The no-intervention withdrawal phase was composed of three sessions. Outcome measures 10 meter walking test(10MWT), timed up and go (TUG) test, 8-figure walk test (8FWT). Results: All results indicated that 10 MWT, TUG, F8WT was improved when compared mental practice(B) to pre base line(A). base line(A) after mental practice intervention(B) was also sustained. Conclusion: As a result of the mental practice, we can know that it helps straight gait, dynamic balance, curved gait to improve.

• The Korean journal of internal medicine
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• v.39 no.4
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• pp.547-554
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• 2024

The incidence and mortality of colorectal cancer (CRC) have decreased through regular screening colonoscopy, surveillance, and endoscopic treatment. However, CRC can still be diagnosed after negative colonoscopy. Such CRC is called interval CRC and accounts for 1.8-9.0% of all CRC cases. Most cases of interval CRC originate from missed lesions and incompletely resected lesions. Interval CRC can be minimized by improving the quality of colonoscopy. This has led to a growing interest in and demand for high-quality colonoscopy. It is important to reduce the risk of CRC and its associated mortality by improving the quality of colonoscopy. In this review article, we provide an overview of colonoscopy quality indicators, including bowel preparation adequacy, the cecal intubation rate, the adenoma detection rate, the colonoscopy withdrawal time, appropriate polypectomy, and complication of the procedure. Because colonoscopy is a highly endoscopist-dependent procedure, colonoscopists should be well-acquainted with quality indicators and strive to apply them in daily clinical practice for the prevention of CRC.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.25 no.1
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• pp.14-20
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• 2016

This paper describes a green stripping process to effectively strip the remaining DFR layer on a non-alkali-based ITO glass surface after an etching process. A stripper, water-soluble amine compound, is used to investigate the characteristics of stripping ability and to suggest a valid method for the green process. Increasing the composition (5-30% concentration) of the ethanol amine-based stripper was found to greatly reduce the stripping time applied in the dipping method. The composition (30%) achieved an excellent stripping effect and free-residue impurities. Additionally, it was possible to obtain the effect of stripping in a way to sustain the release before generating DFR sludge from the ITO glass surface by using dipping condition (stripping time) in the composition. An Additional stripping process (buffering) out of dipping can realize productivity improvement and cost reduction because of the higher proportion of re-use of the stripping solution used in the DFR removal step.

• The KIPS Transactions:PartD
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• v.12D no.3 s.99
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• pp.499-506
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• 2005

A hash chain is a structure organized by hash function with high speed in computation. Systems using the hash chain are using extensively in various cryptography applications such as one-time passwords, server-supported signatures and micropayments. However, the most hash chain based on the system using pre-paid method provides anonymity but has the problem to increase payment cost. In this paper, we propose a new hash chain based on the micropayment system to keep user anonymity safe through blind signature in the withdrawal process of the root value without disclosing privacy information, and to improve efficiency by using secret key instead of public key in the system without the role of certificate.

• Journal of the Korean housing association
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• v.22 no.1
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• pp.85-93
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• 2011

As passing through the Japanese colonial period, Daegu has been changed into a modern city. In addition, the nature of the city had changed a lot by withdrawal of Eup-sung and the opening of the road and the increase of population in Japan. Of course, the expansion of the city was caused by the increase of the Japanese population. To understand the current city, it is most important to understand the past city's characteristics and especially the formation and change of city must be considered with understanding the situation of city. And now the city reflects the role of the city in the past. In fact, the effect of the street constitution in Daegu Eup-sung during Japanese colonial period on the present time was very big and continues. Especially, in order to understand the situation of the city and consider the direction in the future, the analysis of the development process has important implications.This study aimed to consider the change of Daegu Eup-sung Street and Formation of Dwelling Site focusing on the Buksung Street. The purpose of this study is to investigate the nature of the city and changing process of the city by the past Buksung street and the current Buksung street as time goes by.