• Title/Summary/Keyword: What-if Analysis

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A Study on the Applications of Airspace Design Criterions Affecting on the Flight Safety (비행안전에 영향을 미치는 공역설계기준의 적용에 관한 연구)

  • 양한모;유광의
    • Journal of Korean Society of Transportation
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    • v.21 no.1
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    • pp.7-19
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    • 2003
  • The airspace has to be designed considering the flight safety and economic efficiency of aircraft operators. The International Civil Aviation Organization(ICAO) published standards and recommended practices for safe design of the airspace. Each contracting country must follow the ICAO standards in designing the airspace for the utilization of civil aviation. Normally each member establishes its own standards and national aviation law for the safe and efficient design of the airspace, regarding the ICAO standards. However, our government has not developed yet clear and detailed standards and regulation system for airspace design. This might lead to aviation accidents and disputes between operators of aviation system This study is to review the characteristics of ICAO standards and a legal problem related to application of international standards for airspace design. Specifically this research analyzed the case of airspace design and operation of a domestic airport. The results of analysis are as follow: (1) per the safety of civil aviation, it is very required to establish national regulation system to follow ICAO standards in designing airspace, (2) It is also necessary to establish separate procedure for civil aircraft in military air base, when the aerodrome is co-used by military and civil aircraft. If the same procedure for military aircraft is applied to civil aircraft, it is necessary to make clear what the design concept is, (3) and the differences from ICAO standards have to be publicly known.

Does Geography Matter in Technological Partner Selection? (지식확산과 집적경제를 고려한 기업의 기술협력파트너 위치선정 행태)

  • Jo, Yu-Ri
    • Journal of Technology Innovation
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    • v.19 no.2
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    • pp.153-184
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    • 2011
  • This paper investigates what kind of technological partner firms want to cooperate with in terms of partner location. Two geographical factors are considered. One is geographical proximity, given the tradeoff between the effectiveness of knowledge spillovers in proximity and diverse knowledge absorption from geographically distant partners. The other is how many other firms are co-located with potential partners because it is known that clustering regions can create more technological outputs. Analysis on 2008 Korea Innovation Survey data finds that partner proximity is the single most important factor in choosing a cooperation partner. While firms that are located in a region crowded with related industries prefer proximate partners, others that are surrounded by unrelated industries are more likely to cooperate with distant partners. The findings suggest that geographical proximity matters in partner selection because it not only stimulates knowledge spillovers but also reduces costs involving R&D cooperation such as monitoring costs and information costs. Moreover, firms take into consideration both the benefits and risks of clustering regions. If there are so many unrelated firms that they create agglomeration diseconomies such as congestion costs and unintentional knowledge leakages, firms are more likely to try to find their cooperation partners in other regions.

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A Study on The User Acceptance And Variation of Attitude Change in Product Form 1. -Concentrated on External Form Embodiment of Product Semantic by internal and external Reaction of User- (제품의 형태에 있어서 사용자의 수용과 태도변화에 관한 연구 1. -사용자의 귀인적 반응에 대한 제품형태의미의 외형구현을 중심으로-)

  • 정도성;안철홍
    • Archives of design research
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    • v.15 no.1
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    • pp.369-388
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    • 2002
  • 21th century that is repealing change is making the world that can enjoy human spiritual character and freedom wholeheartedly. Therefore, meet hereupon arid design may have to bring conversion to position of beginning that can be software at position that is hardware look raw and result look who is wrapping last result arts provide cause. Therefore, user supposes that do difficult form in that recognize things form, and that difference about attribution reaction may do differ and contradictory attribution reaction while specially 40s and 50s recognize product form laying stress on external form embodiment of product form meaning by guess and this research compares and investigates attribution process for human's attribution reaction instinct and attribution reaction type through scientific, theoretical considerations about form and things theoretically and defined cause reasoning in design. And designed product that things are recognized whether felt thing in product form is what hearing example relation sex between analysis and form of meaning induction by attribution leading person about subjective estimation reaction through literature arrange, and analyze and defined if cause some effect to designed product because drawing urea about attribution reaction through an experiment. And presented model about design access method and forward pratical use possibility and hereafter subject together with conclusion.

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Social work field training awareness on the impact of the research career (사회복지현장실습이 진로의식에 미치는 영향에 관한 연구)

  • Jeon, Seong-Nam
    • Journal of the Korea Society of Computer and Information
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    • v.19 no.6
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    • pp.119-128
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    • 2014
  • In this study, the social welfare field training course there is a growing awareness as professionals in order to verify the impact was conducted. G-local four-year university study social work majors by sampling 198 people were examined for the purpose, through self - survey was conducted. Materials and analytical methods in order to identify the characteristics of a variable frequency, and technical analysis, T-test, F-test, ANOVA, correlation (correlation), Regression (regression) was used for the SPSS 14.0. The results are as follows. First, the personal factors of the individual physician trainees reflect (${\beta}=.197$), and then the same about Social Welfare satisfaction (${\beta}=.205$) of the Social Welfare majors had significant impact on career identity. Second, the personal factors they chose what to major in social work satisfaction (${\beta}=-.291$), and if you feel you select a parent with a major in Social Work and Social Welfare major students feel the satisfaction of having a significant effect on the level of career decision crazy. Third, individual reflect personal physician factors (${\beta}=.156$) is significantly influenced the behavior of career preparation.

An Analysis of Small Area Variations of Hospital Services Utilization in Korea (지역간 입원 이용 변이에 관한 연구)

  • Cho, Woo-Hyun;Lee, Sun-Hee;Park, Eun-Cheol;Sohn, Myong-Sei;Kim, Se-Ra
    • Journal of Preventive Medicine and Public Health
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    • v.27 no.3 s.47
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    • pp.609-626
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    • 1994
  • This study was conducted to investigate whether variations in hospital services utilization across small geographic areas in Korea existed, and if so, what factors are responsible for the variation. The claims data of the fiscal year 1992 obtained from the regional health insurance societies were used for the study. Main findings of the research can be summarized as follows: 1 Extremal Quotients (EQ) of hospital expenditure per capita and hospital days per capita were 2.69 and 2.73, and Coefficient of Variation (CV) were 0.14, both, respectively. The EQ and the CV of admission rate were also 2.71, 0.15. The EQ and the CV of expenditure per admission were 1.73, 0.10 and those of hospital days per admission were 1.29, 0.06. All these statistics were statistically significant and this result provides strong evidence for the existence of small area variations. 2. Comparing patterns of variation among areas, the area which showed higher utilization amounts is Chansungp'o. Koje area, whereas the areas which showed lower utilization amounts are Yongju, Changhung, Miryang, Mokp'o, Koch'ang area. 3. Multivariate analytic methods were used to examine factors related to the variation across areas. In terms of the health resource availability variables, beds per capita or physicians per capita were positively associated with all utilization indices. As for the health service market structure variables, the proportion of health care institutions operating for less than f years was positively related to the expenditure per capita, hospital days per capita and expenditure per admission. In addition the proportion of the private health care institutions also had a negative relationship with total utilization amount and admission rate and the proportion of physicians under age 40 was negatively associated with expenditure per capita and expenditure per admission. With regard to the socio-demographic characteristics, proportion of medicaid population was positively related to hospital days per capita, and percentage of paved road was positively related to hospital days per admission. As a conclusion, wide variations existed across small areas in Korea and supply factors were found to be important in explaining the variation.

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An Experimental Study for the Design of Household-Storage Facilities (부엌 수납장 설계 기준 설정을 위한 기초적 연구)

  • 최재순
    • Journal of the Korean Home Economics Association
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    • v.20 no.4
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    • pp.155-168
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    • 1982
  • What is attempted here is to find out an optimum method for the design of physical environments that could save human energy expenditures and safely perform household duties. There are, if any, very little amount of research done in this area. This is particulary so when the work relates to the designing of household storage facilities in the light of the energy metabolism of human body. The first step to this study, therefore, is to find out the ways by which we can determine the energy metabolism of human body accurately. To measure the volume and the concentration of human respiration continuously and automatically, a new apparatus is selected here. This includes the recording system with the Wright Respirometer and the Expired Gas Analyzer as well as the computer system to multiply volume by concentration of human respiration and to integrate them for a given time. Then, the author experimented on the reliability of this apparatus and came to the conclusion that this apparatus satisfied our need to research the energy metabolism of human body. Next, the general plan and procedures to experiment with this apparatus have been determined as follows: 1) subjects are three young and sound females. Their physical characteristics are shown in Table 1 and most approximates the standard characteristics of Japanese females, 2) height of open shelves is selected in such away as to correspond to the respective height of each subject(see Table 2), 3) utensils to be stored are box shaped object, which weight is 0.5kg, 1.0kg, 2.0kg or 3.0kg, 4) working motions are given while one or two hands as to place utensil on each shelf from the standard working board, 85 cm in height and then to place back it on the board from the shelf and repeated in constant velocity as 10 times per a minute, 5) each posture of motion is chosen by each subject in free, 6) procedures of measurement of human energy metabolism ard shown at(6), 1, Section 3 as specific methods for using this apparatus. Findings of this study are as follows: 1. Human energy expenditures for storing utensils on shelves by each subject are shown in quantity more accurately than in any other studies, under varying conditions about height of shelves, load of utensils and working motion with one hand and two hands (see Fig. 8~13 and Table 3). 2. Experimental formulae of human energy expenditure for that work are shown as formula (8), (9) and (10), to generalize results of 1. and to apply those for working motion under given conditions. 3. As results of analysis on gained data, we are able to show the standard model of human energy expenditures for storing untensils on shelves by the standard Japanese female (see Table 7 and Fig. 14).

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Hospice volunteer's Attitude Toward Care of the Dying (호스피스 자원 봉사자들의 말기 환자 돌봄에 대한 태도)

  • Lee, Mi-Ra;Lee, Won-Hee
    • Journal of Hospice and Palliative Care
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    • v.4 no.1
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    • pp.57-67
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    • 2001
  • Purpose : The purpose of this study was to identify attitudes of hospice volunteers toward care of for terminally ill patients. Method : This was a descriptive study with a sample of 84 adults who were registered for a hospice volunteer education program at Severence Hospice Center. The Frommelt (FATCOD) scale on attitudes toward the care of the dying (Cronbach alpha=.778) and an open ended questions on "what if you only have 6 months to live" were used to collect the data. The data was analyzed using SPSS/W and content analysis. Results : 1) The hospice volunteers were mostly female, with an average age of 45 years, half of them were college graduates and their religious preference was Protestant. 2) The participants of this study demonstrated positive attitudes to care for the dying which is in coherence with hospice philosophy and principles. However they indicated difficulties in maintaining close relationships with people who are dying, and in communicating and sharing, and encouraging those who are dying to express their feelings. In the open ended questions, they identified that their most important issues would be guilt feelings toward their children, family concerns, and the burden of unfinished business in their lives. They also identified the fear of pain in the dying process and fear of the afterlife. The care they would like to receive was to have peace of mind, have a good listener, spiritual counselling, and pain relief and to be respected as a human being. The source of strength would be faith in God and they would like to overcome their of dying. The FATCOD scale has limitation in describing and identifying the need and attitude toward the care of the dying revisions were made. Conclusion : We all are the potential clients for the hospice rare. In a hospice volunteer education program, communication and interpersonal skill are essential. The fear of dying, afterlife, concerns about family with children, and human dignity are major concerns in hospice and palliative care.

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What Kinds of Rearing Stress Do the Mothers of the Gifted Have?: Using a Concept Mapping Approach (영재 자녀를 둔 어머니들의 양육 스트레스 분석: 개념도 기법을 활용하여)

  • Han, Ki-Soon;Lee, Young-Mi
    • Journal of Gifted/Talented Education
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    • v.22 no.4
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    • pp.893-916
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    • 2012
  • This research investigates gifted students' mothers' rearing stress based on the concept mapping method. For this, 12 gifted students' mothers solicited, gathered and analyzed related statements, and then did multidimensional scaling and hierarchical cluster analysis. The stress value was .273 which was appropriate for the two level concept mapping study. In addition 101 mothers of gifted students rated for the rearing stresses they experience. Results were as follows. First, 79 concrete statements were solicited and as a result of concept mapping were categorized as 'burden and conflict as mothers of the gifted', 'possible negative characteristics due to the giftedness', and 'self-esteem and pressure by the title of the gifted'. Especially following items showed relatively high average: worrying about how to give the child a specific help for his/her career(M=4.65); worrying that she might be intervening too much in their child's behaviors(M=4.60); getting pressured supporting the child to get involved in the gifted education system continually(M=4.46); worrying if her child is not developing his/her talent enough due to the lack of time and money(M=4.44); being concerned that her high expectations might be putting her child under too much pressure (M=4.43). Implications of the study related to gifted education practices were discussed.

ZFC and Non-Denumerability (ZFC와 열거불가능성)

  • An, Yohan
    • Korean Journal of Logic
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    • v.22 no.1
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    • pp.43-86
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    • 2019
  • If 1st order ZFC is consistent(has a model($M_1$)) it has a transitive denumerable model($M_2$). This leads to a paradoxical situation called 'Skolem paradox'. This can be easily resolved by Skolem's typical resolution. but In the process, we must accept the model theoretic relativity for the concept of set. This relativity can generate a situation where the meaning of the set concept, for example, is given differently depending on the two models. The problem is next. because the sentence '¬denu(PN)' which indicate that PN is not denumerable is equally true in two models, A indistinguishability problem that the concept <¬denu> is not formally indistinguishable in ZFC arise. First, I will give a detail analysis of what the nature of this problem is. And I will provide three ways of responding to this problem from the standpoint of supporting ZFC. First, I will argue that <¬denu> concept, which can be relative to the different models, can be 'almost' distinguished in ZFC by using the formalization of model theory in ZFC. Second, I will show that <¬denu> can change its meaning intrinsically or naturally, by its contextual dependency from the semantic considerations about quantifier that plays a key role in the relativity of <¬denu>. Thus, I will show the model-relative meaning change of <¬denu> concept is a natural phenomenon external to the language, not a matter of responsible for ZFC.

A Study on the Vowel System Universals of Southeast Asian Languages: The Cases of Tagalog, Malay and Thai. (동남아시아 언어의 모음체계 보편성 연구 - 타갈로그어, 말레이어, 타이어를 대상으로 -)

  • Heo, Yong
    • Cross-Cultural Studies
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    • v.48
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    • pp.391-417
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    • 2017
  • Southeast Asian languages are famous for having a large number of vowel sounds with an average of more than 20 vowel sounds in this certain language family. In addition, there are approximately 1,500 languages in this area, which accounts for approximately 20% of total languages in the world. For this reason, vowel systems of Southeast Asian languages should be explored to determine the nature of vowel structures of human natural languages. In this study, we analyze vowel systems of three languages, Tagalog, Malay and Thai, that have only primary or normal vowels and thus are relatively simple structures based on descriptive and analytic universals. We would also like to confirm if the six criteria of the tentative evaluation model taken from several previous literature is appropriate in applying analysis of vowel system universals under the method of the Greenbergian Universals or statistic universals. What we have found from this research are (i) the three languages have high level of universals with some exceptional cases such as three-vowel system of Tagalog, and (ii) some of the six criteria, together with some cases of analytic universals, are not quite suitable for understanding language-specific universals that are different from other languages.