• 농업과학연구
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• 제12권2호
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• pp.242-252
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• 1985

본(本) 연구(硏究)는 벼 이삭누룩병(病)의 발생생태(發生生態)에 관(關)한 기초자료(基礎資料)를 얻기 위(爲)하여 전투원(專透源)인 균핵(菌核) 및 후막포자(厚膜胞子)의 발아조건(發芽條件)과 병원성(病原性)을 조사(調査)하였으며 발병(發病)에 미치는 재배환경(栽培環境)의 영향(影響)과 수도(水稻) 품종간(品種間)의 발병정도(發病程度)를 조사(調査)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 이병립(罹病粒)에 형성(形成)되는 후막포자괴(厚膜胞子塊)는 밭벼의 것이 논벼의 것보다 크고 수당(穗當) 이병립수(罹病粒數)도 밭벼에서 많았다. 균핵(菌核)의 형성율(形成率)은 밭벼 22.2%, 논벼 3.6 %로서 밭벼에서 현저(顯著)히 높았다. 2. 월동(越冬) 균핵(菌核)의 발아율(發芽率)은 7월초(月初)의 고온(高溫)에서는 81%로 높았고 발아소요일수(發芽所要日數)도 19일(日)로 짧았으며 균핵(菌核)은 지표면(地表面)이나 지하(地下) 1cm깊이에 매몰(埋沒)된 것은 $25^{\circ}C{\sim}30^{\circ}C$ 고온(溫度)에서 잘 발아(發芽)하였고 균핵(菌核)은 1/4로 절단(切斷)되어도 발아력(發芽力)이 유지(維持)되었다. 3. 자실체(子實體)는 균핵당(菌核當) 평균(平均) 6개(個)가 형성(形成)되었고 자실체당(子實體當) 자낭각(子囊殼)은 50~140개(個)가 형성(形成)되었다. 4. 후막포자(厚膜胞子)는 형성시기(形成初期)인 황색포가(黃色胞子)가 발아력(發芽力)이 왕성(旺盛)하였고 성숙(成熟)해 갈수록 발아율(發芽率)이 저하(低下)되었다. 5. 후막포자(厚膜胞子)는 자낭포자(子囊胞子)는 수잉기(穗孕期) 주사접종(注射接種)에서 발원성(病原性)을 나타냈으며 후막포자(厚膜胞子)의 유아기(幼芽期) 접종(接種)은 병원성(病原性)이 없었다. 6. 이병주(罹病株)의 수당이병립(穗當罹病粒)의 발생수(發生數)는 1~5립(粒)이 대부분(大部分)이었으며 제일하위(第一下位) 지경절(枝梗節)의 벼알에 많이 발생(發生)되었고 상위절(上位節)로 올라갈수록 적었다. 7. 이삭누룩병(病)은 만생종(晩生種)일수록 발병율(發病率)이 높았으며 일반계(一般系) 중(中)에서는 상풍벼, 삼남(三南)벼, 은하(銀河)벼에서 통일계(統一系) 중(中)에서는 풍산, 서광(曙光), 백양(白羊)벼 등(等)에서 발병(發病)이 많았다. 8. 본병(本病)은 질소시비량(窒素施肥量)이 많으면 많을수록 발병(發病)이 많았으며 이앙(移秧)이 늦어질수록 발병(發病)이 많았다. 9. 이삭누룩병(病)의 이병립(罹病粒)이 증가(增加)할수록 수중(穗重), 등숙율(登熟率), 천립중(千粒重) 등(等)이 떨어지고 쌀의 오염도(汚染度)도 높았다. 경제적(經濟的) 피해(被害) 한계선(限界線)은 이병수율(罹病穗率) 0.8%선(線)이었다.

• 한국환경성돌연변이발암원학회:학술대회논문집
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• 한국환경성돌연변이발암원학회 2003년도 추계학술대회
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• pp.34-63
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• 2003

Occupational and environmental exposure to manganese continue to represent a realistic public health problem in both developed and developing countries. Increased utility of MMT as a replacement for lead in gasoline creates a new source of environmental exposure to manganese. It is, therefore, imperative that further attention be directed at molecular neurotoxicology of manganese. A Need for a more complete understanding of manganese functions both in health and disease, and for a better defined role of manganese in iron metabolism is well substantiated. The in-depth studies in this area should provide novel information on the potential public health risk associated with manganese exposure. It will also explore novel mechanism(s) of manganese-induced neurotoxicity from the angle of Mn-Fe interaction at both systemic and cellular levels. More importantly, the result of these studies will offer clues to the etiology of IPD and its associated abnormal iron and energy metabolism. To achieve these goals, however, a number of outstanding questions remain to be resolved. First, one must understand what species of manganese in the biological matrices plays critical role in the induction of neurotoxicity, Mn(II) or Mn(III)? In our own studies with aconitase, Cpx-I, and Cpx-II, manganese was added to the buffers as the divalent salt, i.e., $MnCl_2$. While it is quite reasonable to suggest that the effect on aconitase and/or Cpx-I activites was associated with the divalent species of manganese, the experimental design does not preclude the possibility that a manganese species of higher oxidation state, such as Mn(III), is required for the induction of these effects. The ionic radius of Mn(III) is 65 ppm, which is similar to the ionic size to Fe(III) (65 ppm at the high spin state) in aconitase (Nieboer and Fletcher, 1996; Sneed et al., 1953). Thus it is plausible that the higher oxidation state of manganese optimally fits into the geometric space of aconitase, serving as the active species in this enzymatic reaction. In the current literature, most of the studies on manganese toxicity have used Mn(II) as $MnCl_2$ rather than Mn(III). The obvious advantage of Mn(II) is its good water solubility, which allows effortless preparation in either in vivo or in vitro investigation, whereas almost all of the Mn(III) salt products on the comparison between two valent manganese species nearly infeasible. Thus a more intimate collaboration with physiochemists to develop a better way to study Mn(III) species in biological matrices is pressingly needed. Second, In spite of the special affinity of manganese for mitochondria and its similar chemical properties to iron, there is a sound reason to postulate that manganese may act as an iron surrogate in certain iron-requiring enzymes. It is, therefore, imperative to design the physiochemical studies to determine whether manganese can indeed exchange with iron in proteins, and to understand how manganese interacts with tertiary structure of proteins. The studies on binding properties (such as affinity constant, dissociation parameter, etc.) of manganese and iron to key enzymes associated with iron and energy regulation would add additional information to our knowledge of Mn-Fe neurotoxicity. Third, manganese exposure, either in vivo or in vitro, promotes cellular overload of iron. It is still unclear, however, how exactly manganese interacts with cellular iron regulatory processes and what is the mechanism underlying this cellular iron overload. As discussed above, the binding of IRP-I to TfR mRNA leads to the expression of TfR, thereby increasing cellular iron uptake. The sequence encoding TfR mRNA, in particular IRE fragments, has been well-documented in literature. It is therefore possible to use molecular technique to elaborate whether manganese cytotoxicity influences the mRNA expression of iron regulatory proteins and how manganese exposure alters the binding activity of IPRs to TfR mRNA. Finally, the current manganese investigation has largely focused on the issues ranging from disposition/toxicity study to the characterization of clinical symptoms. Much less has been done regarding the risk assessment of environmenta/occupational exposure. One of the unsolved, pressing puzzles is the lack of reliable biomarker(s) for manganese-induced neurologic lesions in long-term, low-level exposure situation. Lack of such a diagnostic means renders it impossible to assess the human health risk and long-term social impact associated with potentially elevated manganese in environment. The biochemical interaction between manganese and iron, particularly the ensuing subtle changes of certain relevant proteins, provides the opportunity to identify and develop such a specific biomarker for manganese-induced neuronal damage. By learning the molecular mechanism of cytotoxicity, one will be able to find a better way for prediction and treatment of manganese-initiated neurodegenerative diseases.

• Asia pacific journal of information systems
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• 제21권4호
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• pp.1-25
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• 2011

Internet-based commerce has undergone an explosive growth over the past decade as consumers today find it more economical as well as more convenient to shop online. Nevertheless, the shift in the common mode of shopping from offline to online commerce has caused consumers to have worries over such issues as private information leakage, online fraud, discrepancy in product quality and grade, unsuccessful delivery, and so forth, Numerous studies have been undertaken to examine the role of perceived risk as a chief barrier to online purchases and to understand the theoretical relationships among perceived risk, trust and purchase intentions, However, most studies focus on empirically investigating the effects of trust on perceived risk, with little attention devoted to the effects of perceived risk on trust, While the influence trust has on perceived risk is worth studying, the influence in the opposite direction is equally important, enabling insights into the potential of perceived risk as a prohibitor of trust, According to Pavlou (2003), the primary source of the perceived risk is either the technological uncertainty of the Internet environment or the behavioral uncertainty of the transaction partner. Due to such types of uncertainty, an increase in the worries over the perceived risk may negatively affect trust, For example, if a consumer who sends sensitive transaction data over Internet is concerned that his or her private information may leak out because of the lack of security, trust may decrease (Olivero and Lunt, 2004), By the same token, if the consumer feels that the online merchant has the potential to profit by behaving in an opportunistic manner taking advantage of the remote, impersonal nature of online commerce, then it is unlikely that the merchant will be trusted, That is, the more the probable danger is likely to occur, the less trust and the greater need to control the transaction (Olivero and Lunt, 2004), In summary, a review of the related studies indicates that while some researchers looked at the influence of overall perceived risk on trust level, not much attention has been given to the effects of different types of perceived risk, In this context the present research aims at addressing the need to study how trust is affected by different types of perceived risk, We classified perceived risk into six different types based on the literature, and empirically analyzed the impact of each type of perceived risk upon consumer trust in an online merchant and further its impact upon purchase intentions. To meet our research objectives, we developed a conceptual model depicting the nomological structure of the relationships among our research variables, and also formulated a total of seven hypotheses. The model and hypotheses were tested using an empirical analysis based on a questionnaire survey of 206 college students. The reliability was evaluated via Cronbach's alphas, the minimum of which was found to be 0.73, and therefore the questionnaire items are all deemed reliable. In addition, the results of confirmatory factor analysis (CFA) designed to check the validity of the measurement model indicate that the convergent, discriminate, and nomological validities of the model are all acceptable. The structural equation modeling analysis to test the hypotheses yielded the following results. Of the first six hypotheses (H1-1 through H1-6) designed to examine the relationships between each risk type and trust, three hypotheses including H1-1 (performance risk ${\rightarrow}$ trust), H1-2 (psychological risk ${\rightarrow}$ trust) and H1-5 (online payment risk ${\rightarrow}$ trust) were supported with path coefficients of -0.30, -0.27 and -0.16 respectively. Finally, H2 (trust ${\rightarrow}$ purchase intentions) was supported with relatively high path coefficients of 0.73. Results of the empirical study offer the following findings and implications. First. it was found that it was performance risk, psychological risk and online payment risk that have a statistically significant influence upon consumer trust in an online merchant. It implies that a consumer may find an online merchant untrustworthy if either the product quality or the product grade does not match his or her expectations. For that reason, online merchants including digital storefronts and e-marketplaces are suggested to pursue a strategy focusing on identifying the target customers and offering products that they feel best meet performance and psychological needs of those customers. Thus, they should do their best to make it widely known that their products are of as good quality and grade as those purchased from offline department stores. In addition, it may be inferred that today's online consumers remain concerned about the security of the online commerce environment due to the repeated occurrences of hacking or private information leakage. Online merchants should take steps to remove potential vulnerabilities and provide online notices to emphasize that their website is secure. Second, consumer's overall trust was found to have a statistically significant influence on purchase intentions. This finding, which is consistent with the results of numerous prior studies, suggests that increased sales will become a reality only with enhanced consumer trust.

• 지능정보연구
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• 제25권3호
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• pp.43-62
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• 2019

한때, 이상 탐지 분야는 특정 데이터로부터 도출한 기초 통계량을 기반으로 이상 유무를 판단하는 방법이 지배적이었다. 이와 같은 방법론이 가능했던 이유는 과거엔 데이터의 차원이 단순하여 고전적 통계 방법이 효과적으로 작용할 수 있었기 때문이다. 하지만 빅데이터 시대에 접어들며 데이터의 속성이 복잡하게 변화함에 따라 더는 기존의 방식으로 산업 전반에 발생하는 데이터를 정확하게 분석, 예측하기 어렵게 되었다. 따라서 기계 학습 방법을 접목한 SVM, Decision Tree와 같은 모형을 활용하게 되었다. 하지만 지도 학습 기반의 모형은 훈련 데이터의 이상과 정상의 클래스 수가 비슷할 때만 테스트 과정에서 정확한 예측을 할 수 있다는 특수성이 있고 산업에서 생성되는 데이터는 대부분 정답 클래스가 불균형하기에 지도 학습 모형을 적용할 경우, 항상 예측되는 결과의 타당성이 부족하다는 문제점이 있다. 이러한 단점을 극복하고자 현재는 클래스 분포에 영향을 받지 않는 비지도 학습 기반의 모델을 바탕으로 이상 탐지 모형을 구성하여 실제 산업에 적용하기 위해 시행착오를 거치고 있다. 본 연구는 이러한 추세에 발맞춰 적대적 생성 신경망을 활용하여 이상 탐지하는 방법을 제안하고자 한다. 시퀀스 데이터를 학습시키기 위해 적대적 생성 신경망의 구조를 LSTM으로 구성하고 생성자의 LSTM은 2개의 층으로 각각 32차원과 64차원의 은닉유닛으로 구성, 판별자의 LSTM은 64차원의 은닉유닛으로 구성된 1개의 층을 사용하였다. 기존 시퀀스 데이터의 이상 탐지 논문에서는 이상 점수를 도출하는 과정에서 판별자가 실제데이터일 확률의 엔트로피 값을 사용하지만 본 논문에서는 자질 매칭 기법을 활용한 함수로 변경하여 이상 점수를 도출하였다. 또한, 잠재 변수를 최적화하는 과정을 LSTM으로 구성하여 모델 성능을 향상시킬 수 있었다. 변형된 형태의 적대적 생성 모델은 오토인코더의 비해 모든 실험의 경우에서 정밀도가 우세하였고 정확도 측면에서는 대략 7% 정도 높음을 확인할 수 있었다.

• 지역사회간호학회지
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• 제13권2호
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• pp.205-215
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• 2002

Objectives: This study was designed to develop and evaluate a stage matched exercise intervention program to effectively increase exercise behaviors in urban elders. Methods: The study included three phases: preliminary descriptive data collection, program development, and program evaluation. The data for the preliminary descriptive phase were collected between May and June 2001. The study participants were 89 urban elders who responded a questionnaire that included general characteristics, exercise related experiences, stage, and process of change in exercise behaviors. Data were analyzed using descriptive statistics, $x^2$-test, and content analysis. Development of the program was based on the preliminary data. and a literature review, and was guided by the tran theoretical model. It consisted of strategies to facilitate the process of changes used in each stage. Evaluation of the program was achieved from October to December 2001, using a case study method, in which eight urban female elders participated. Interviews were conducted on a weekly basis in the form of either an individual interview, or group discussion. Each elder subject received education in accordance with the program strategies and education materials. In the case that a subject's stage of change moved into another one, the scores for the process of change were re-measured. The data were analyzed using the content analysis technique. Results: The results were as follows: 1. Elders who participated in the preliminary data collection phase were over 75 years of age, and the majority of them were women. They had a higher educational level, and fewer number of illnesses than the subjects in other studies. Their stage of change was divided into pre-contemplation and maintenance. The social liberation scores were the highest across all stages of change. There was no difference between men and women on scores for processes of change in each stage. 2. The stage matched exercise intervention program that was developed in this study consisted of one counseling type program and three distinguished educational booklet materials. 3. The results of the case studies are as follows: 1) The study participants were 8 women between 75 and 87 years of age. At the first interviews, all of them were in the pre-contemplation stage. All of them reached the action stage before the 7th week. The scores for processes of change that were the focus in each stage increased more than the scores for other processes of change. During the early stages of change, experimental processes increased more than behavioral processes. However. this pattern was reversed during later stages of change. 2) Characteristics of the subjects in each stage were identical as presented at the tran theoretical model. The intervention strategies were effective in the transition occurred in any stage. 3) Barriers for exercise included unwillingness to exercise, fatigue, shortness of breath, and pain. Ways to overcome these barriers were 'learning an alternative exercise method that can be done at home', 'self-promising/ exercise-promising', and 'use of cues to exercise'. 4) The factors that affected the application of the program were consideration of age and personal preference in selecting an exercise pattern, individualized intervention, and use of education materials appropriate to elders. Women over 80 years of age preferred muscle strengthening and stretching exercise, because they can be easily done at home. They also preferred individualized interventions, materials that were easy to read, and education contents appropriate for elders. Conclusion: In conclusion, the stage matched exercise intervention program that considered the characteristics of the elders was effective to facilitate exercise behaviors of the elders.

• 마케팅과학연구
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• 제20권2호
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• pp.123-134
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• 2010

考虑到消费者和供应商的利益, 公司利用网络为媒介来沟通并向消费者销售产品. 这一趋势使得很多研究者和实践者都关注网上购物环境这一领域. 本文测试了网上消费者行为和具有不同快乐主义水平的网址的模型. 与以往的研究不同, 我们包括了所有三种情绪(激励, 快乐和支配)并将此运用到模型中. 本研究中, 我们假设网址的外观, 例如背景颜色, 音乐和字体在消费者最初接触到网址时均影响三种情绪(Mazaheri, Richard, and Laroche, 2011). 反之, 这些情绪会影响消费者对网址氛围的感知–网址信息量, 效率和娱乐性的感知. 这些假设与Zajonc (1980)的研究一致. 他认为情感的作用是独立于感性的和认知操作并且可以影响回应. 我们因此提出网址氛围和流量的感知影响消费者对网址和产品的态度, 网址卷入和购买意图. 另外, 我们研究网址的快乐主义水平对模型中所有关系的调节作用. 因此, 我们比较享乐网址路径系数 "高" 和 "低". 我们用39个真实的网站涵盖了12种产品类别(8种服务和4种实物产品)来测试模型. 这其中, 回复者认为20个是高享乐, 19个为低享乐. EQS6.1的结果支持整体模型: x2=1787 (df=504), CFI=.994; RMSEA=.031. 所有假设都是显著的. 另外, 多群组分析表明在高享乐和低享乐网址群组之间的几个非不变量结构路径. 这些结果支持三种情绪影响消费者对网址氛围, 流量和其他消费者行为变量的认知. 我们发现快乐极大的影响这网址态度和网址娱乐性的认知. 激励积极的影响其他两种情绪, 网址信息量的认知和网址卷入. 而且, 激励对流量的影响非常显著. 这些结果说明在支配和消费者对网址效率的认知之间有很强的相关. 支配同时和网址态度和流量相关. 另外, 结果还表明网址卷入和对产品的态度是购买意图最重要的两个因素. 网址信息量和流量也积极的影响购买意图. 多群组分析的结果支持网址快乐主义的调节作用. 与低(高)享乐网址相比, 实用(享乐)属性对其他变量的影响比高(低)享乐网址更强. 在这三种情绪中, 支配(控制感)影响在高享乐网址中更强. 快乐影响在低享乐网址中更强. 而且, 网址信息量的影响对高享乐网址更强. 另一方面, 信息效率对网址信息量认知的影响和网址卷入对产品态度的影响在低享乐网址中更强.

• Asia pacific journal of information systems
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• 제22권4호
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• pp.7-29
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• 2012

Smartphone and its applications (i.e. apps) are increasingly penetrating consumer markets. According to a recent report from Korea Communications Commission, nearly 50% of mobile subscribers in South Korea are smartphone users that accounts for over 25 million people. In particular, the importance of smartphone has risen as a geospatially-aware device that provides various location-based services (LBS) equipped with GPS capability. The popular LBS include map and navigation, traffic and transportation updates, shopping and coupon services, and location-sensitive social network services. Overall, the emerging location-based smartphone apps (LBA) offer significant value by providing greater connectivity, personalization, and information and entertainment in a location-specific context. Conversely, the rapid growth of LBA and their benefits have been accompanied by concerns over the collection and dissemination of individual users' personal information through ongoing tracking of their location, identity, preferences, and social behaviors. The majority of LBA users tend to agree and consent to the LBA provider's terms and privacy policy on use of location data to get the immediate services. This tendency further increases the potential risks of unprotected exposure of personal information and serious invasion and breaches of individual privacy. To address the complex issues surrounding LBA particularly from the user's behavioral perspective, this study applied the privacy calculus model (PCM) to explore the factors that influence the adoption of LBA. According to PCM, consumers are engaged in a dynamic adjustment process in which privacy risks are weighted against benefits of information disclosure. Consistent with the principal notion of PCM, we investigated how individual users make a risk-benefit assessment under which personalized service and locatability act as benefit-side factors and information privacy risks act as a risk-side factor accompanying LBA adoption. In addition, we consider the moderating role of trust on the service providers in the prohibiting effects of privacy risks on user intention to adopt LBA. Further we include perceived ease of use and usefulness as additional constructs to examine whether the technology acceptance model (TAM) can be applied in the context of LBA adoption. The research model with ten (10) hypotheses was tested using data gathered from 98 respondents through a quasi-experimental survey method. During the survey, each participant was asked to navigate the website where the experimental simulation of a LBA allows the participant to purchase time-and-location sensitive discounted tickets for nearby stores. Structural equations modeling using partial least square validated the instrument and the proposed model. The results showed that six (6) out of ten (10) hypotheses were supported. On the subject of the core PCM, H2 (locatability ${\rightarrow}$ intention to use LBA) and H3 (privacy risks ${\rightarrow}$ intention to use LBA) were supported, while H1 (personalization ${\rightarrow}$ intention to use LBA) was not supported. Further, we could not any interaction effects (personalization X privacy risks, H4 & locatability X privacy risks, H5) on the intention to use LBA. In terms of privacy risks and trust, as mentioned above we found the significant negative influence from privacy risks on intention to use (H3), but positive influence from trust, which supported H6 (trust ${\rightarrow}$ intention to use LBA). The moderating effect of trust on the negative relationship between privacy risks and intention to use LBA was tested and confirmed by supporting H7 (privacy risks X trust ${\rightarrow}$ intention to use LBA). The two hypotheses regarding to the TAM, including H8 (perceived ease of use ${\rightarrow}$ perceived usefulness) and H9 (perceived ease of use ${\rightarrow}$ intention to use LBA) were supported; however, H10 (perceived effectiveness ${\rightarrow}$ intention to use LBA) was not supported. Results of this study offer the following key findings and implications. First the application of PCM was found to be a good analysis framework in the context of LBA adoption. Many of the hypotheses in the model were confirmed and the high value of $R^2$ (i.,e., 51%) indicated a good fit of the model. In particular, locatability and privacy risks are found to be the appropriate PCM-based antecedent variables. Second, the existence of moderating effect of trust on service provider suggests that the same marginal change in the level of privacy risks may differentially influence the intention to use LBA. That is, while the privacy risks increasingly become important social issues and will negatively influence the intention to use LBA, it is critical for LBA providers to build consumer trust and confidence to successfully mitigate this negative impact. Lastly, we could not find sufficient evidence that the intention to use LBA is influenced by perceived usefulness, which has been very well supported in most previous TAM research. This may suggest that more future research should examine the validity of applying TAM and further extend or modify it in the context of LBA or other similar smartphone apps.

• 농업과학연구
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• 제26권2호
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• pp.77-93
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• 1999

This study is aiming at identifying the foreward and backward lingkage effects of the farm land base development project. Korean Government has continuously carried out farmland base development projets including the integrated agricultural development projects. large and medium scale irrigation projects and the comprehensive development of the four big river basin including tidal land reclamation and estuary dam construction for the all weather farming since 1962. the starting year of the five year economic development plans. Consequently the irrigation rate of paddy fields in Korea reached to 75% in 1998 and to escalate the irrigation rate, the Government had procured heavy investment fund from IBRD. IMF and OECF etc. To cope with the agricultural problems like trade liberalization in accordance with WTO policy, the government has tried to solve such problems as new farmland base development policy, preservation of the farmland and expansion of farmland to meet self-sufficiency of foods in the future. Especially, farmland base development projects have been challanged to environmental and ecological problems in evaluating economic benefits and costs where the value of non-market goods have not been included in those. Up to data, in evaluating benefits and costs of the projects, farmland base development projects have been confined to direct incremental value of farm products and it's related costs. Therefore the projects'efficiency as a decision making criteria has shown the low level of economic efficiencies. In estimating economic efficiencies including Leontiefs input-output analysis of the projects could not be founded in Korea at present. Accordingly this study is aimed at achieving and identifying the following objectives. (1) To identify the problems related to the financial supports of the Government in implementing the proposed projects. (2) To estimated backward and foreward linkage effects of the proposed project from the view point of national economy as a whole. To achieve the objectives, Hwangrak benefited area with reservoir which is located in Seosan-haemi Disticts, Chungnam Province were selected as a case study. The main results of the study are summarized as follows : a. The present value of investment and O & M cost were amounted to 3,510million won and the present value of the value added in related industries was estimated at 5.913million won for the period of economic life of 70 years. b. The total discounted value of farm products in the concerned industries derived by the project was estimated at 10,495million won and the foreward and backward linkage effects of the project were amounted to 6,760 and 5,126million won respectively. c. The total number of employment opportunities derived from the related industries for the period of project life were 3,136 man/year. d. Farmland base development projects were showed that the backward linkage effects estimated by index of the sensitivity dispersion were larger than the forward linkage effect estimated by index of the power of dispersion. On the other hand, the forward linkage effect of rice production value during project life was larger than the backward linkage effect e. The rate of creation of new job opportunity by means of implementing civil engineering works were shown high in itself rather than any other fields. and the linkage effects of production of the project investment were mainly derived from the metal and non-metal fields. f. According to the industrial linkage effect analysis, farmland base development projects were identified economically feasible from the view point of national economy as a whole even though the economic efficiencies of the project was outstandingly decreased owing to delaying construction period and increasing project costs.

• 한국조경학회지
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• 제50권6호
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• pp.96-109
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• 2022

본 연구는 도시재생사업에서 핵심전략으로서 조경의 역할과 존재 가치를 세부사업 유형별로 확인하고자 출발하였고 도시재생 활성화계획의 추진과정에서 나타난 조경의 참여 양상과 특성을 파악하여 그 증진 방안을 모색하고자 하였다. 도시재생사업이 추진된 2017년부터 2019년까지의 뉴딜사업 중 공원, 정원, 조경, 쉼터, 숲, 녹화, 식재, 꽃 등의 용어가 사업내용에 포함된 총 822개소를 대상으로 유형별 사업에서 조경의 참여 현황과 선행연구 분석, 문헌조사, 활성화 계획보고서, 사업주체별 인터뷰 등 통합적 접근 방법을 적용하였으며, 사업유형에 따른 조경의 참여 양상과 특성을 구분하여 도표화하였다. 도시재생사업에서 조경적 특성을 사업유형에 따라 하드웨어적 또는 소프트웨어적 참여방식으로 분석한 결과, 사업의 추진과정에서 확인된 조경의 참여 양상과 증진방안은 다음과 같다. 첫째, 도시재생에서 조경의 역할과 참여 양상은 도시재생사업의 유형에 따라 각각 다르게 나타났다. 사업의 유형별 전제 조건과 사업의 추진 주체, 사업별 재생전략의 방향 및 차별성, 주민의 참여도 등이 복합적으로 작용하고 있어 조경의 참여 행위가 변화된 의미와 역할로 변화, 확대되고 있었다. 둘째, 도시재생사업에서 조경의 확대된 참여방식의 변화와가치는 사업의 추진과정에서 다의적이고 복합적인 특성으로 나타났는데 이는 고전적 의미로 조경 가치가 사업유형에 따라 실체적 양상이 변화되어 나타나고 있음을 알 수 있다. 셋째, 본 연구를 통해 도시재생에서활용될수있는재생의 전략적, 실천적 수단으로서 '조경'의 역할과 가치 인식에 대한 중요성을 확인하였다. 따라서 조경의 참여 증진을 위해서는 형태와 장소(form & place)적 측면의 공원 조성 등 하드웨어적 사업위주의 참여에서 사업별 도시재생 전략에 따른 참여방식의 변화를 통한 다양화가 요구된다. 아울러 소프트웨어적 사업의 과정(process)적 측면에서도 체험 및 활동프로그램으로 주민들 간 공동체 의식함양에 중요한 매개체 역할을 하는 조경의 참여가 필요하다. 본 연구는 도시재생사업 추진의 주체로 조경의 역할이 확대되고 있음을 실체적으로 파악하고, 그 증진 방향을 제시했다는 것에서 의의를 찾을 수 있으며, 향후 도시재생의 계획과 실천적 영역에서 조경적 특성을 활용한 참여와 연구가 지속되어야 할 것이다.

• 항공우주정책ㆍ법학회지
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• 제31권2호
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• pp.99-143
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• 2016

General aviation and air transport are two wings of the civil aviation industry. Chinese air transport is developing rapidly, and has become the world second air transport system only second to US since 2005. However, Chinese civil aviation is far behind the world average level, and cannot meet requirements of economic construction and social development. The transition and structural adjustment of Chinese economy provide the general aviation with a unprecedented broad market. The prospect of general aviation is promising and anticipated. The development of general aviation industry needs the legislative supports, and the current legislative conditions of Chinese general aviation are undoubtedly far behind the realistic requirements. Accelerating the legislation in Chinese general aviation industry requires scientific legislation concept. First, Legislation must promote development of general aviation industry. The general aviation will serves as a Chinese emerging industry that boosts domestic demand, promotes employment and expedite domestic economic development. We should, based on both the concept of promoting the industrial development of general aviation and national industrial planning, enact and rectify relative laws and regulations. And we should also straighten out the relationship between aviation security and industrial development and promote the revolution of low-altitude airspace management in an all-round way, in order to improve the utilization rate of airspace resources, classify and establish airspace, simplify examination and approval procedure and intensify operation management. In addition, what we should do is to expedite the infrastructure layout construction, guide the differentiated but coordinated development of general aviation industries in various areas, establish a united supervision mechanism of general aviation, redistrict the responsibilities of Chinese Air Control Agency and set up legislation, law enforcement and judicial systems with clarified institutions, clear positioning and classified responsibilities, so as to usher in a new era of the legislative management of Chinese general aviation industry. Second, shift the focus from regulations to both regulations and services. Considering the particularity of the general aviation, we should use American practices for reference and take into account both regulation and service functions when enacting general aviation laws. For example, we should reduce administrative licensing and market supervision, and adopt "criteria" and "approval" management systems for non-commercial and commercial aviation. Furthermore, pay attention to social benefits. Complete social rescuing mechanism through legislation. It should be clarified in legislation that general aviation operators should take the responsibilities of, and ensure to realize social benefits of environmental protection and ecological balance .Finally, rise in line with international standards. Modify Chinese regulations which is inconsistent with international ones to remove barriers to international cooperation. Specify basic legislative principles. One is the principle of coordination. Realize coordination between the civil aviation and general aviation, between military aviation and civil aviation, and among departments. Two is the principle of pertinence. The general aviation has its own rules and specialties, needing to be standardized using specialized laws and regulations. Three is the principle of efficiency. To realize time and space values of general aviation, we should complete rules in aerospace openness, general aviation airport construction, general aviation operations, and regulation enforcement. Four is the principle of security. Balance the maximum use of resources of Chinese airspace and the according potential threats to Chinese national interests and social security, and establish a complete insurance system which functions as security defense and indemnificatory measure. Establish a unified legal system. Currently, the system of Chinese general aviation laws consists of national legislation, administrative laws and regulations and civil aviation regulations (CAR). Some problems exist in three components of the system, including too general content, unclear guarantee measures, incomplete implementation details, and lacking corresponding pertinence and flexibility required by general aviation regulations, stringency of operation management and standards, and uniformity of standards. A law and regulation system, centered on laws and consisting of administrative laws regulations, industrial regulations, implementation details, industrial policies and local laws and regulations, should be established. It is suggested to modify the Civil Aviation Law to make general aviation laws complete, enact the Regulations of General Aviation Development, and accelerate the establishment, modification and abolition of Chinese general aviation laws to intensify the coordination and uniformity of regulations.