• Title/Summary/Keyword: 조직기억

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A study on Influencing Factors of Knowledge Creation focus on Transactive Memory (지식성장의 영향요인에 관한 연구-분산기억중심으로)

  • Liu, Chang;Kim, Sang Wook
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.2
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    • pp.1073-1083
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    • 2015
  • As an empirical study focused on how transactive memory concept influence the four processes of knowledge growth, this study aimed at explaining the function of transactive memory in the dynamic process of knowledge growth. To verify the research model, this study carried out a path analysis of 130 team memebers and as a result, part of the team transactive memory measurements does affect the knowledge growth. Consequentially, transactive memory especially based on team level, is relevant with knowledge growth. According to team level, this study targeted at the team members, and by adopting the team transactive memory concept in Cognitive Psycology, theoretically explained and analysed how to approach personal knowledge in internal organizations. To accelerate the knowledge process, the work should be modified collaboratively by trusting the team members' duty relations more than specialized knowledge. Furthermore, managers had better assign team members the work where they can make the most of their personal knowledge, and this study presented that the whole team performance could be improved by doing that.

알기쉬운 전자정보처리조직(EDPS)1

  • Korean Library Association
    • KLA journal
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    • v.21 no.4
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    • pp.19-28
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    • 1980
  • 과학문명이 고도로 발달함에 따라 모든 문제의 해결에 있어서 신속하고 정확하게 처리할 수 있는 기법의 개발이 고조되어 왔다. 이러한 시대적 요구에 부응하기 위해서 인간은 Computer를 만들었고, 이를 실제로 여러 분야에 활용함으로써 괄목할만한 성과를 이룩해 왔다. 그리고 앞으로는 더욱 더 인간 생활의 여러 분야에 깊이 응용될 전망이고 보면, 정보처리조직 분야는 결코 소수의 특수 분야에 특정인들의 생활 도구로 활용되는 것이 아니라 모든 사람의 필수적인 생활 도구화하는 추세이다. 특히 우리나라에서 Computer가 활용되기 시작한 역사는 일천하지만 활용분야나 그 질적인 면에서 대단한 성장을 계속하고 있는 실정이다. 따라서 오늘의 시점에서는 정보처리조직에 대한 기본적인 지식과 활용 기법은 누구나 이해할 필요성이 제고되고 있는 것이다. 이와 같은 추세에 따라 관심을 가지고 정보처리조직에 대한 교육을 실시하고 있다. 따라서 도서관자동화논의가 한창 진행되고 있음에 보조를 맞추는 뜻에서 본 전자정보처리조식개론을 게재하는 바입니다. 그래서 본서는 위에 지적한 사항을 유념하여 전체구성을 10개 Chapter로 엮었다.Chapter 1과 Chapter2는 컴퓨터의 개요와 Computer에서의 자료의 표현방법을, Chapter3 부터 Chapter5까지는 기억장치와 중앙처리장치를 비롯하여 입출력장치를 ,Chapter6부터는 각 프로그래밍 언어의 특성과 오퍼레이팅 시스템 및 기타 사항 등으로 되어있다.

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Effects of the Deer Antler Extract on Scopolamine-induced Memory Impairment and Its Related Enzyme Activities (녹용 추출물이 치매 동물모델의 기억력 개선과 관련효소 활성에 미치는 효과)

  • Lee, Mi-Ra;Sun, Bai-Shen;Gu, Li-Juan;Wang, Chun-Yan;Fang, Zhe-Ming;Wang, Zhen;Mo, Eun-Kyoung;Ly, Sun-Young;Sung, Chang-Keun
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.38 no.4
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    • pp.409-414
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    • 2009
  • The aim of this study was to investigate the ameliorating effects of deer antler extract on the learning and memory impairments induced by the administration of scopolamine (2 mg/kg, i.p.) in rats. Tacrine was used as a positive control agent for evaluating the cognition enhancing activity of deer antler extract in scopolamine-induced amnesia models. The results showed that the deer antler extract-treated group (200 mg/kg, p.o.) and the tacrine-treated group (10 mg/kg, p.o.) significantly ameliorated scopolamine-induced amnesia based on the Morris water maze test. Although there was no statistical significance of brain ACh contents among the experimental groups, the brain ACh contents of the deer antler extract-treated group was slightly higher than that of the scopolamine-treated group. The inhibitory effect of deer antler extract on the acetylcholinesterase activity in the brain was significantly lower than that of scopolamine-treated group. The tacrine- and the deer antler-treated groups reduced the MAO-B activity compared to the scopolamine-treated group, but not significantly. These results suggest that the deer antler extract could be an effective agent for the prevention of the cognitive impairment induced by cholinergic dysfunction.

생체재료용 Ti-Nb-Ge합금의 초탄성 특성 및 기계적 성질에 미치는 집합조직의 영향

  • Kim, Han-Sol;Kim, Won-Yong
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2009.05a
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    • pp.48.1-48.1
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    • 2009
  • Ti합금은 생체적합성이 우수하여 생체재료로 널리 사용되어 왔으며, 특히 Nitinol로 알려진 Ti-Ni합금은 형상기억특성 및 초탄성특성을 지녀 치열교정용 와이어나 혈관확장용 스텐트 등으로 사용되어 왔다. 최근 Ni과 같은 세포독성 합금원소의 용출가능성이 문제가 되어 Ni을 함유하지 않는 Ti합금이 주목받고 있다. 본 연구에서는 Ti-Nb-Ge 합금의 집합조직과 초탄성 및 기계적 특성의 관계를 고찰함으로써, 사용목적이나 요구특성에 부합되는 가공열처리방법을 도출하고자 하였다. 비소모전극식 진공아크용해장치를 이용하여 Ti-Nb-Ge 합금 버튼을 만들고, 이를 $1000^{\circ}C$에서 30분간 유지 후 얼음물에 급랭처리하였다. 이후 집합조직 제어를 위해 등속압연 및 이속압연의 두가지 방법으로 냉간압연한 후, $850^{\circ}C$에서 30분~2시간까지 열처리하였다. 광학현미경과 투과전자현미경을 이용하여 미세조직을 관찰하고, X-선 회절분석법을 이용하여 집합조직을 분석하였다. 또한 순환식 인장시험을 통해 시편의 초탄성 특성 및 기계적 성질을 평가하였다. 등속압연재는 {001}<110>에서 {111}<110>에 이르는 $\alpha$-fiber가 발달하는 한편, 이속압연재는 {001} 및 {111}가 발달하는 것으로 나타났다. 또한 압연방향으로 <110>이 평행한 집합조직이 발달할수록 초탄성 특성이 높게 나타났다. 이는 응력유기 마르텐사이트 변태 시 $\beta$의 <110>방향이 $\alpha$" <010>방향으로 변할 때 길이가 증가하므로, 시편에 인장방향으로 <110>이 평행한 집합조직이 발달할수록 응력유기 마르텐사이트 변태가 용이해지기 때문인 것으로 사료된다.

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Relationship between Restoring Force and Typical Stroke with SMA Coil Spring in Electrosurgical Knee Wand (슬관절 수술용 전기소작완드에 적용되는 형상기억합금 코일스프링의 회복력 및 행정거리의 관계)

  • Yang, Young-Gyu;Han, Gi-Bong;Kim, Cheol-Woong
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.35 no.12
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    • pp.1301-1307
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    • 2011
  • Electrosurgical knee wand (EKW) is a high-frequency thermocautery instrument and is often used for coagulation, ablation, excision, and extirpation of knee ligaments and tissues. In order to maximize the success rate, ease, and safety of knee surgery using EKW and radiofrequency ablation, it is necessary to ensure that the EKW selectively approaches the lesion with utmost accuracy and safety. The key feature of this instrument is its excellent maneuverability. Hence, the authors constructed a tensile spring model based on a shape memory alloy (SMA), which exhibits the shape memory effect. This model can be used in knee surgery as it is considered the most biocompatible femorotibial surgical actuator. The changes in external temperature with current and the thermoelectric characteristics of the SMA were investigated. The relationship between the restoring force and the typical stroke (TS) in response to the conditions in the SMA tensile spring design were evaluated. In conclusion, as the diameter of the SMA tensile spring decreased, the maximum temperature increased. The strain in the actuator caused a stable and proportional increase in the force and induced current for up to 15s, but this increase became very unstable after 30s. Moreover, the relationship between the current and the TS was more stable than that between the current and the restoring force.

Effects of Treadmill Exercise on Memory and Hippocampal BDNF Expression in Streptozotocin-induced Diabetic Rats (트레드밀 운동이 당뇨흰쥐에서 기억력과 해마 BDNF 발현에 미치는 영향)

  • Lee, Hee-Hyuk;Yoon, Jin-Hwan;Kim, Seung-Hee
    • Journal of Life Science
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    • v.17 no.11
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    • pp.1464-1471
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    • 2007
  • Diabetes mellitus is a chronic metabolic disorder, leading to many complications including cognitive deficit. Regular exercise has often been recommended as a therapeutic maneuver to the diabetic patients for the prevention of secondary complications. In the present study, the effects of treadmill exercise on memory and brain-derived neurotrophic factor (BDNF) in the hippocampus of streptozotocin (STZ)-induced diabetic rats were investigated. Male SD rats, aged 6 weeks, were randomly assigned to the following three groups: control group(n=8), STZ-induced diabetic group(n=8), and STZ-induced diabetes and exercise group(n=8). Diabetes was induced by a single injection of STZ (50 mg/kg body weight). Treadmill running was conducted with duration and frequency of 30 minutes and 5 times per week, respectively, for 8 weeks. Memories were tested in the Morris water maze. Western blotting was performed to detect BDNF expression in the hippocampus. In this study, we found that compared to the control group, the STZ-induced diabetes group had a significantly impaired cognitive performance along with suppressed BDNF expression in the hippocampus and the exercise group had a higher cognitive function in diabetic rats. Therefore, the current findings of the study show that a treadmill running exercise can improve diabetes-induced impairment of cognitive function. And the improved cognitive function appears to be related to an alleviation in diabetes-induced BDNF expression in hippocampus.

Rubus coreanus Miquel Improves on Impairment of Memory in Senescence-Accelerated Mouse (SAM) (노화촉진마우스를 이용한 복분자의 기억력 감퇴 개선 효과)

  • Choi, Mi-Ran;Lee, Min-Young;Kim, Jeong-Eun;Hong, Ji-Eun;Jang, Kuen-Hye;Lee, Jae-Yong;Chun, Jang-Woo;Kim, Tae-Hwan;Shin, Hyun-Kyung;Kim, Eun-Ji
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.9
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    • pp.1253-1258
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    • 2012
  • In the present study, we investigated the effects of Rubus coreanus Miquel (RCM) on memory ability of senescence-accelerated mice (SAM). Prone 8 strains of SAM mice (SAMP8), which is a useful animal for investigating the mechanism of brain aging and senile dementia, were fed a diet containing 100 mg/kg body weight/day of RCM for 8 weeks. Memory ability of mice was examined by using passive avoidance test and Morris water maze test. SAMP8 mice showed remarkable memory impairment compared with senescence-resistant 1 strains of SAM (SAMR1). RCM significantly improved memory ability of SAMP8 mice. In addition, acetylcholineasterase activities decreased in the brain of SAMP8 mice treated with RCM. Taken together, these results suggest that RCM may act as an acetylcholineasterase inhibitor, thereby improving senescence-related memory impairment.

Existing Knowledge in the Organization and the New Product Performance (조직 내 기존지식과 신제품 성과에 관한 연구)

  • Suh, Sang-Hyuk;Cho, Sung-Bok;Jin, Yun-Kyung
    • Journal of Korea Technology Innovation Society
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    • v.9 no.4
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    • pp.884-908
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    • 2006
  • The focus of this study is to analyze the link between existing knowledge in the organization and NPD performance. After a comprehensive literature review, we identified factors influential in the management of existing knowledge, such as efficiency of information acquisition, shared interpretation, structure of organization. Through an empirical research, we found that existing knowledge was positively associated with the efficiency of information acquisition and shared interpretation. Additionally, a strong relationship was found between information acquisition efficiency and NPD. Shared information, however, was not found to be associated with NPD. This result, make us recognize the necessity to better understand some subprocesses through which existing knowledge affects new product performance.

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The Effect of Information Technology and Transactive Memory Systems on Team Performance (정보기술과 교류기억시스템이 팀 성과에 미치는 영향)

  • Mu Moung Cho Han;Choong Kwon Lee;Kyung Jin Cha
    • Information Systems Review
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    • v.18 no.4
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    • pp.155-171
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    • 2016
  • Today's organizations make a large investment in information technology (IT) that supports knowledge management. The perceived importance of transactive memory systems (TMS) is increasing in the aspect of team performance. This study aims to understand the mediating effect of knowledge sharing and usage from the perspective of the relationship between IT support for knowledge management and TMS for team performance. To this end, this study analyzes the survey responses obtained from 224 members of 37 different teams using IT support for knowledge management. The results are as follows. First, the effect of IT support on knowledge management was significant in TMS. Second, the mediating effect of IT support on knowledge management through TMS was higher than its direct effect on knowledge sharing and usage. Third, IT support for knowledge management had a greater effect on knowledge sharing than on knowledge usage. Fourth, the effect of TMS appeared to be ordered by tacit knowledge sharing, explicit knowledge sharing, tacit knowledge usage, and explicit knowledge usage. Fifth, the relationship of team performance with knowledge sharing and usage was significant in the order of tacit knowledge usage, tacit knowledge sharing, and explicit knowledge usage.

Effects of Polygoni multiflori radix Liquors on the Memory Impairment of Rat (하수오 침출술이 흰쥐의 기억력 손상에 미치는 영향)

  • Kong, Hyun-Joo;Shin, Seung-Ryeul;Hwang, Su-Jung;Lee, Kyung Eun;Jang, Jung-Hyeon;Yang, Kyung-Mi
    • Culinary science and hospitality research
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    • v.22 no.4
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    • pp.128-142
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    • 2016
  • This study was carried out to investigate the effect of memory impairment in rats fed alcohol liquid diets. The rats were randomly divided into 4 groups. While the control(C) group received a diet containing 12% of the daily calories with isocarbohydrate, the other groups received a diet containing 12% of the daily total calories with 36% Soju (A), 25% Cynanchi wilfordii radix liquors (WA), and 25% Polygoni multiflori radix liquors (RA) for 6 weeks. After 6 weeks, ADH activity in the brain tissue of the Group A was found to be significantly lower than Group C but significantly higher than both Groups WA and RA(p<0.05). ADLH activity was revealed to be the highest in the Group WA (p<0.05). The concentration of acetaldehyde, a highly toxic metabolite, was the highest in the Group A, but its concentration decreased significantly if fed a liquid diet containing WA. The concentration of acetylcholine, which has a high correlation with memory impairment, was significantly lower in Group A, although Group RA group was the highest compared to the other groups (p<0.05). AChE activity of the Group A was higher than Group C but lower in Groups WA and RA (p<0.05).