• Journal of Digital Convergence
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• v.10 no.11
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• pp.515-524
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• 2012

Purpose: This study was examined to identify effects of suicidal though on health status social support, and life satisfaction in elderly. Method: The subjects consisted of 123 elderly. The data collected from June to July 2012 were analyzed using descriptive statistics, t-test, ANOVA, pearson correlation coefficients and stepwise multiple regression. Result: The mean scores of health status ($2.47{\pm}.70$), social support ($3.36{\pm}.90$), and life satisfaction ($2.90{\pm}.60$) were above the average. And suicidal thought ($.51{\pm}.37$) was below the average. Health status, social support, life satisfaction, and suicidal though were significantly different according to generalized characteristic. Significant correlations were found between health status, social support, life satisfaction, and suicidal thought. Health status was influencing factors of suicidal thought (26.6%). Conclusion: These findings indicate that perceived health status, social support, and life satisfaction may be necessities to decrease suicidal thought of elderly.

• Journal of Digital Convergence
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• v.10 no.11
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• pp.525-533
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• 2012

This aim of the present study was to determine the prevalence of suicide-related behavior(suicide ideation, plans and attemps) and its relationship in college students. 384 college students in Daejeon, Chungbuk provice were selected for this study from April 2 to April 21, 2012. Collected data was analyzed by using the SPSS 19.0 pragram. The prevalence of lifetime suicide ideation, plans and attemps were 32.3%, 4.7% and 3.0%. Respondents with mild ~ severe depressive symptoms were 42.2%. Depressive symptom was the consistent and crucial risk factor associated with suicide-related behavior indicates(suicide ideation, plans and attempts) commonly. We consider the suicide ideation and depressive symptom when develop the suicide prevention program. To prevent suicide, institutionalization of suicide screening program for who experience suicide ideation, depression, follow management of pre-suicide attemptor, surrounders of suicide victims, development of manual about strategy toward suicide, operating mental health program, delicate media representation.

• The Korean Journal of Zoology
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• v.33 no.1
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• pp.94-102
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• 1990

In Xenopus laevis the cranial myotomes, W, X, Y and Z represent transient embry-specific structures since they undergo reduction" in the later stage of development. An extensive set of expertmental studies was undertaken in order to discriminate whether the cranial myotomes perform a programmed autonomous death or reduction" by the influence from surrounding tissue such as otic vesicle. Removal of the neighboring otic vesicle did not affect WXYZ degeneration. Grafting the otic vesicle to novel site along the somite file did not induce local myotome degenration. When anterior-most somitic primordia were relocated to the trunk somite region, they underwent reduction eventually. Likewise, with the transplantation of posterior somite forming region into the anterior, autonomous differentiation pafferns were observed. And the cullture of presumptive somitic tissue revealed that WXYZ might degnerate like in vivo. It is therefore concluded that the cranial myotomes of Xenopus laevis exhibit an autonomous cell death during later embryogenesis.yogenesis.

• Journal of Life Science
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• v.22 no.11
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• pp.1558-1570
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• 2012

In radiation biology, analysis of various mechanisms in response to radiation has been accomplished with the use of model organisms. These model organisms are powerful tools for providing a biologically intact in vivo environment to assess physiological and pathophysiological processes affected by radiation. Accumulated data using these models have been applied to human clinical studies (including the evaluation of radiotherapeutic efficacy) and discovery of radiotherapy reagents. However, there are few studies to provide overall integrated information about these useful model organisms. Thus, this review summarizes the results of radiation biology studies using four well-known model organisms: yeast, Caenorhabditis elegans, Drosophila melanogaster, and mice.

• Communications of Mathematical Education
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• v.15
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• pp.273-280
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• 2003

1983년 말 중국 형주시 소재 강릉장가산 247호 묘에서 죽간의 형태로 출토된 ${\ulcorner}$산수소${\lrcorner}$ 는 그것이 엮어진 시점이 유휘의 ${\ulcorner}$구장산술${\lrcorner}$ 보아 최소한 450년 가량이나 거슬러 올라간다는 점에서 동야수학사의 기원을 크게 앞당기게 하는 막중한 의의를 지니는 문서가 아닐 수 없다. 그러나 석문 자체가 최근 들어와서야 겨우 공개되었을 뿐, 현재로서는 자료에 대한 평가와 내용 분석은 물론, 변역마저도 제대로 이루어지지 못한 상태에 있다. 이 글은 ${\ulcorner}$산수서${\lrcorner}$ 와 ${\ulcorner}$구장산술${\lrcorner}$ 의 내용을 배교하여 ${\ulcorner}$산수서${\lrcorner}$ 의 특징을 밝히는 동시에 동양수학의 초창기 발달의 궤적을 더듬어 보려는 시도이다. ${\ulcorner}$산수서${\lrcorner}$ 는 '상승(相乘)'에서 '이전(里田)'까지 이어지는 70개 제명(題名)하에 서술되어 있는데, 제명들은 주제를 나타내는 것과 산법을 나타내는 것을 혼재하는 것으로 나타난다. 내용 가운데에는 '여직(女織)', '우시(羽矢)', '소광(少廣)' 등이 문제처럼 ${\ulcorner}$구장산술${\lrcorner}$ 의 그것들과 기본적으로 같거나 유사한 것들이 다수 발견되어 고대수학 전통의 연속성을 엿볼 수 있게 하지만, 동시에 의료수가 문제인 '의(醫)'처럼 ${\ulcorner}$산수서${\lrcorner}$에서만 발견되는 것들도 더러 눈에 띈다. ${\ulcorner}$산수서${\lrcorner}$ 와 ${\ulcorner}$구장산술${\lrcorner}$ 사이에 이루어진 수학 발달은, 이를테면, 제급근 사이에 있어서 전자의 경우에는 $\sqrt{240}$을 $15\frac{15}{31}$로 계산한 데서도 드러나듯이 보간법에 의존한 반면, 후자의 경우에는 온답을 제시하는 데 하등의 어려움을 겪지 않았다는 차에서도 확인된다.

• Elastomers and Composites
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• v.45 no.2
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• pp.80-86
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• 2010

Carbon nanotubes (CNTs) exhibit excellent mechanical, electrical, and magnetic properties as well as nanometer scale diameter and high aspect ratio, which make them an ideal reinforcing agent for high strength polymer composites. The functionalized CNTs are believed to be very promising in the fields such as preparation of functional and composite materials. CNT-Polymer composites are expected to have good processability characteristics of the polymer and excellent functional properties of the CNTs. However, since CNTs usually form stabilized bundles due to Van der Waals interactions, are extremely difficult to disperse and align in a polymer matrix. The biggest issues in the preparation of CNT-reinforced composites reside in efficient dispersion of CNTs into a polymer matrix, and the alignment and control of the CNTs in the matrix. There are several methods for the dispersion of nanotubes in the polymer matrix such as solution mixing, bulk mixing, melt mixing, in-situ polymerization and chemical functionalization of the carbon nanotubes, etc. These methods and preparation of high performance CNT-polymer composites are described in this review.

• Journal of Korea Society of Industrial Information Systems
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• v.8 no.2
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• pp.7-13
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• 2003

The Internet presents a unique platform for disseminating digital content such as music, video, games, software, text, business and proprietary corporate information. It promises ubiquitous access, while at the same time fundamentally challenging the traditional rules of ownership and distribution of content. In such environment, safe protection and proper delivery of digital content would be a crucial requirement toward a new e-business model. Research on the Digital Rights Management (DRM) focuses on filling this functional vacancy of the market transition by providing a more viable business model based. XrML(eXtensible Rights Markup Language) provides a universal tool for specification of rights, fees, and issuing conditions(licenses) associated with the use and protection of digital content. ContentGuard has developed XrML to unify the Digital Rights Management(DRM) specifications and encourage interoperability. It seems that all working groups of DRM agree to use XrMl for their right description language.

• Korean Journal of Logic
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• v.21 no.2
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• pp.207-231
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• 2018

The identity theory of truth insists that a truth bearer is identical with a fact. First, I will consider how we can make the thesis intelligible. For this, I classify the identity relation which the identity theory discusses into two kind; trivial and non-trivial relation. And I show that the trivial one is not adequate to be qualified to be applied to the identity theory. The non-trivial relation can be adopted in robust or modest way. I argue that the robust kind of identity theory is incoherent itself. Then, I explain why we should compare the modest identity theory with the deflationism. From this comparing, I will draw the consequence that two choices are left to the modest theory. If they choose one way, there is no reason for us to prefer the identity theory to deflationism. On the other hand, in case that they choose the other way, I argue what kinds of interesting problem is left to be solved by the modest theorists. Finally, I will evaluate the limit and prospect of the result of the problem in case that the identity theorists achieve their goal.

• Membrane Journal
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• v.28 no.5
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• pp.297-306
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• 2018

This review focused carbon-free hydrogen productions from ammonia decomposition including inorganic membranes, catalysts and the presently studied reactor configurations. It also contains general information about hydrogen productions from hydrocarbons as hydrogen carriers. A Pd-based membrane (e.g. a porous ceramic or porous metallic support with a thin selective layer of Pd alloy) shows its efficiency to produce the high purity hydrogen. Ru-based catalysts consisted of Ru, support, and promoter are the efficient catalysts for ammonia decomposition. Packed bed membrane reactor (PBMR), Fluidized bed membrane reactor (FBMR), and membrane micro-reactor have been studied mainly for the optimization and the improvement of mass transfer limitation. Various types of reactors, which contain various combinations of hydrogen-selective membranes (i.e. Pd-based membranes) and catalysts (i.e. Ru-based catalysts) including catalytic membrane reactor, have been studied for carbon-free hydrogen production to achieve high ammonia conversion and high hydrogen flux and purity.

• The Journal of the Korea Contents Association
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• v.12 no.6
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• pp.402-412
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• 2012

The purpose of this study was to analyze the types of Brand name spectrum for hospitals, and to analyze the differences of types depending on the characteristics of hospitals. Study data was collected from the yearbook of Korean Hospital Association in 2008. The hospital's name was divided into meaningful words and then the spectrum type of hospital name was decided based on the meaning of words. Hospital variables were used to investigate the difference of the types of brand name spectrum among hospitals. The study results showed that arbitrary name was the most frequently used in hospitals, then followed by the suggestive name, descriptive name, and then coined name. In arbitrary name, district name and person's name were most frequently used as the hospital name. Although most hospitals had one type of naming spectrum, some hospitals had types more than two. When hospital managers are developing hospital name, they will need to consider not only how it can provide the unique images to customers, but also how they protect their brand in legal aspects.