• Journal of the Mineralogical Society of Korea
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• v.20 no.3
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• pp.223-229
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• 2007

The mechanism of hydrothermally synthesizing Na-A zeolite from siliceous mudstone at a $Na_2O/SiO_2$ ratio of 0.6, a $SiO_2/Al_2O_3$ 2.0 and a $H_2O/Na_2O$ 119 has been observed by IR, DTA, XRD and SEM. This mudstone is a tertiary periodic sedimentary rock and widely spreads around the Pohang area. In the early hydrothermal synthesis at $80^{\circ}C$ in an autoclave, sodium silicate and sodium aluminate were found to be preferentially reacted to generate Na-A type zeolite. Gibbsite and bayerite were also formed due to the presence of extra aluminum oxide in the feedstock. As reaction time in-creased up to 50 h, residual sodium aluminatewas reacted with siliceous mudstone, causing the Na-A zeolite crystal to grow and the hydroxylsodalite to generate. Therefore, in the $14{\sim}50\;h$ synthetic time, Na-A zeolite and hydroxylsodalite were formed. Also, if reaction time passed over 50 h, a part of the Na-A zeolite was finally redissolved and reacted with hydroxylsodalite to synthesize Na-P zeolite, generating porous surface of Na-A zeolite and disappearing hydroxylsodalite.

• Journal of Digital Convergence
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• v.16 no.3
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• pp.345-351
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• 2018

We study convergent influence on job burnout(MBI-GS: Maslach Bunout Inventory-General Survey) and its association with Organizational Commitment Questionnaire(OCQ), Type A Behavior Pattern(TABP) and depression(CES-D: Center for Epidemiologic Studies Depression scale) among Hospital Administrative Staff(HAS). The survey was administered to 201 staff from 9 general hospitals located in J area from Jul. 3rd, 2017 to Jul. 29th, 2017. The structured self-administered questionaries were used. MBI-GS was positively correlated with TABP and CES-D, and it was negatively correlated with OCQ. With the analysis of covariance structure, CES-D was more influential on MBI-GS than OCQ and TABP. The study found the higher TABP and CES-D, and the lower OCQ tend to increase MBI-GS. The results indicate that the efforts, to decrease TABP and CES-D, and to increase OCQ, are required to decrease the MBI-GS of HAS. The results are expected to be useful for organization personnel management to decrease the MBI-GS of HAS. In the following study, the analysis about additional factors of influence on MBI-GS will be needed.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.37 no.2
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• pp.95-105
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• 2001

A series of experiment is carried out to determine the holding power of the existing anchors used in the stationary gear in the coast of the South sea. The experiment apparatus is made of the pulling machine, the load cell, the personal computer and three water tanks the bottom of which are mud, sand and m & s respectively. The result obtained are as follows : 1. On the tension and holding power of the existing anchors, B-type of the stock anchor with two fluke shows the greatest and gets smaller on order of A-type one with a fluke. The holding power of the anchors shows the greatest in the mud and gets smaller in order of m & s, sand. And, the holding power depending upon the length of anchor rope increase as the length does up to the 4 times of depth. 2. On the holding power per fluke area of the existing anchors in case of ration of length of anchor rope to depth is 2, 3 and 4, A-type anchor shows about 310-320 kg/m supper(2), 470-480 kg/m supper(2), 590-640 kg/m supper(2) respectively, B-type one 260-265 kg/m supper(2), 390-450 kg/m supper(2), 630-700 kg/m supper(2) respectively, and C-type one 70-100 kg/m supper(2), 150-180 kg/m supper(2), 210-270 kg/m supper(2) respectively. The holding power per fluke area of the anchors increase as the length of anchor rope does. 3. On the coefficient of holding power of the existing anchors, A-type anchor shows the greatest and gets smaller in the order of B-type one, C-type one.

• Korean Journal of Culture and Social Issue
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• v.22 no.1
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• pp.19-39
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• 2016

Though research has shown that public transportation drivers experience greater burnout than other drivers, the sources of their burnout and possible mediators remain largely unknown. In response, in this study we investigate the relationships among sensation seeking, Type A driving behavior, and meaning of work to elucidate the burnout experienced by bus drivers in Gyeonggi-do, South Korea. To collect data regarding these relationships, 188 bus drivers answered a questionnaire involving the sensation seeking scale, burnout scale, and meaning of work scale. Results showed that Type A driving behavior mediated the relationship between sensation seeking and burnout, while meaning of work moderated the mediated model. These findings demonstrate that sensation-seeking bus drivers tend to experience greater burnout given their tendency to exhibit Type A driving behavior, and this relationship depends on perceived meaning of work. This study therefore contributes meaningful information and outlines significant implications in understanding drivers' burnout.

• Korean Journal of Psychosomatic Medicine
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• v.14 no.2
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• pp.81-87
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• 2006

A lot of studies have investigated the role of psychosocial and behavioral risk factors in the etiology and pathogenesis of cardiovascular disease. On the basis of prospective population studies that found a relationship between Type A behavior and cardiac morbidity and mortality independent of traditional risk factors, Type A behavior was declared a risk factor for the development of coronary heart disease. Additionally, recently proposed, a new personality construct, Type D personality have been reported to be associated with the increased risk for cardiovascular morbidity and mortality. In Korea, however, there were few studies about these issues. This article attempts to provide an overview of accumulating evidences on the Type A behavioral pattern and Type D personality related with cardiovascular disease to offer new directions for research.

• Journal of The Korean Dental Society of Anesthesiology
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• v.9 no.1
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• pp.17-23
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• 2009

배경: 보툴리눔 독소 A형은 강직성 질환을 비롯한 여러 질환의 치료제로 널리 사용되고 있다. 최근에 보툴리눔 독소 A형은 근육비대를 치료하기 위해 널리 이용되고 있다. 하지만 보툴리눔 독소의 근육비대의 치료효과에 대해서 알려진 바가 거의 없다. 본 연구는 토끼 정강뼈 근육에 보툴리눔 A, B형을 주입 후 시간경과에 따른 근육의 위축을 확인하여 근육비대의 치료에 보툴리눔 B형이 효과적인지 확인하고자 하였다. 방법: 36마리의 토끼를 4그룹으로 분류하였다(1 그룹: 생리식염수 주사: 2 그룹: 보툴리눔 독소 A, B - 2U, 3 그룹: 보툴리눔 독소 A, B - 5U, 4 그룹: 보툴리눔 독소 A, B - 10U). 정강뼈근육에 보툴리눔 독소 A, B형을 주입 후 1, 2, 4주에 정강뼈 근육의 부피를 측정하였다. 신경자극기를 이용하여 독소 주입 후 1, 2, 4주의 근육의 단일 수축을 확인하여 근육기능의 변화여부를 확인하였다. 결과: 보툴리눔 독소 B형을 주입시 통계적으로 유의하지 않지만 A형에 비해 근육 부피의 감소가 관찰되었다(P>0.05). 반면, 근육의 단일 수축은 보툴리눔의 용량에 관계없이 B형을 주입한 근육에서 더 높게 관찰 되었다. 결론: 보툴리눔 독소 B형을 주입한 경우 근육 기능의 회복속도는 빠른 반면 근육의 위축은 A형에 비해 더 오랫동안 지속되었다. 따라서 근육비대의 치료에 있어 보툴리눔 독소 B형이 A형보다 보다 더 효과적이라고 사료된다.

• Annals of Clinical Neurophysiology
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• v.2 no.2
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• pp.130-134
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• 2000

Abnormal writing can result from a large variety of neurologic disorders of motor control. Primary writing tremor(PWT) in its pure form denotes occurrence of a disabling tremor induced by writing alone. Therefore PWT is typical task-specific tremor. PWT could be classified as either type A or type B. In a strict sense, type B PWT is not pure form of PWT because it is not task specific. We describe a case of PWT type A. A 53-year-old right handed policeman complained of a 4 year history of shaking of his right hand that interfered with writing. Tremor appeared during writing but not on adopting the hand position normally used for writing.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.8 no.2
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• pp.243-246
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• 2005

Pleural effusion represents a rare complication of acute hepatitis A infection. Twelve year-old girl was admitted with complaints of general weakness, nausea and icteric sclerae. She also complained of right chest pain. Right decubitus view of chest radiograph showed pleural fluid accumulation. Laboratory findings were as follows: AST/ALT 1692/1970 IU/L, total/direct bilirubin 4.48/3.66 mg/dL and HA IgM Ab (+). On the seventh day of hospitalization, her general condition was much improved and chest radiography showed resolved pleural effusion.

• The Korean Journal of Applied Statistics
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• v.27 no.6
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• pp.933-945
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• 2014

Bayesian spatiotemporal analysis is of considerable interest to epidemiological applications because health data is collected over space-time with complicated dependency structures. A basic concept in spatiotemporal modeling is introduced in this paper to analyze space-time disease data. The paper reviews a range of Bayesian spatiotemporal models and analyzes Hepatitis A data in Korea.

• Journal of Astronomy and Space Sciences
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• v.17 no.2
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• pp.151-162
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• 2000

The general properties of the NCBs, divided into A and F types according to their spectral types, have been presented. The evolutionary status of the F type near-contact binaries are closer to that of the contact systems, i.e., W UMa type binaries, if it is assumed that the evolution of the NCBs is governed by the thermal relaxation oscillation theory. The mass-radius relation, mass-luminosity relation and H-R diagram of the NCBs provide that the A type NCBs suffer from more active mass transfer than F types. The components of the NCBs ar still in main-sequence like W UMa type stars and their two components lines parallel to the ZAMS.