• Journal of Bio-Environment Control
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• v.29 no.3
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• pp.231-238
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• 2020

Strawberry (Fragaria × ananassa Duch.), a herbaceous perennial crop, is a popular fruit crop with high economical and nutritive values. This study was conducted to investigate the effect of the runner training angle (RTA) on the length of internodes and number of runners produced in strawberry 'Seolhyang' and 'Maehyang' in an attempt to achieve a higher production rate of runner plants and increase the propagation efficiency. Runners were trained for 30 days to grow at an angle of 0° (vertically upward), 45°, 90° (horizontal), 135°, or 180° (hanging down) from the upward vertical axis. The experiment was carried out in a glasshouse with 29/20℃ day/night temperatures, an average light intensity of 450 μmol·m^-2·s^-1 PPFD coming from the sun, and a natural photoperiod of 12 hours. For both 'Seolhyang' and 'Maehyang', the RTA affected number and length of runners, and number and fresh and dry weights of runner plants. Training at an angle of 135° or 180° shortened length of runners and internodes in 'Seolhyang'. These RTAs also produced runner plants with the lowest fresh and dry weights in both cultivars. The RTA did not affect the runner diameter, but affected the runner morphology in both cultivars. As compared to a RTA of 135°, a 180° RTA increased number of runner plants produced, making it the most proliferative RTA.

• Korea journal of population studies
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• v.21 no.2
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• pp.58-82
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• 1998

It is usually proposed that job security of old age workers is hampered by the structure of wage increasing with age. This paper sets forth a model to comprehend the characteristic of the old age workers' labor market and policy implications derived from it. In order to stimulate demand for old age workers, policy initiatives should be taken as follows : the wage criteria should be simplified which apply differently from one institution to other; incentives relatively favorable for employing old age workers' in manufacturing sector should be also given to service sectors; employment subsidy or other tax incentives should be given for labor contract after the retirement age; licensing and evaluation system for job ability should be introduced based on occupation & job analysis. To lower the reservation wage of workers, mortgage loan for house and long-term low interest loan for tuition fees should be developed together with stabilization of housing cost. Wedding culture which requires high expense should be amended. Above all, it is necessary to install reasonable social security system. Policy orientation should also pay attention to reduce labor supply of the old aged via aiding old age workers' firm opening and voluntary civil service together with developing various honor programs for members of civil corps.

• Korean Business Review
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• v.11
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• pp.195-216
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• 1998

Ownership of an asset can be identified with the right to exercise "residual control" where the contract is silent about decision rights, or with the right to receive any "residual returns" that remain after contractual. obligations are fulfilled. Although the concept of "ownership" seems reasonably clear in many of the cases, the concepts of residual control and the residual returns that define ownership are actually quite elusive. For large corporations, there is really no single individual who owns both the residual returns and the residual control. Despite the limited qualifications, ownership is clearly. the most common and effective meas to motivate people to create, maintain, and improve the value of assets. In this paper, we try to clarify the relationships among financial structure, ownership, and corporate control with the concept of ownership defined as the residual control and the residual returns, Financial securities are not just claims to part of a firm's net income. They give the security holder certain rights. A careful matching of rights of control and returns can create incentives that increase total value of the firms. In the corporate firms, managers, lenders, and shareholders have different interests. And the financial structure affects how different those interests are and what decisions management will make. Managers are, in general, better informed than investors about the firm's prospects. The financial decisions by managers may affect investors' beliefs and, therefore, the price of shares and the value of the firm.

• Journal of Korean Society of Disaster and Security
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• v.12 no.2
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• pp.47-56
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• 2019

Recently, in order to overcome the difficulty of entering a fire source due to the occurrence of a large amount of smoke in the event of a fire in a parking lot, it has used that a method of discharge smoke using air supply, exhaust fans and jet fans installed for ventilation of parking lots. In this study, the variation of flow in the smoke layer was observed using CCTV under two conditions, in which only the air supply fan operates and the manned fan operates together, and the temperature around the plume was compared to Albert eq. to assess its suitability as a parking lot ventilation performance evaluation method. As a result, it was found that the smoke layer could be disturbed if the Jet Fan was operated at the same time, which could lead to the possibility of an initial evacuation disturbance. However, the additional operation of the Jet Fan has been confirmed by the observation CCTV that the emission performance is improved, which is believed to help conduct the suppression operation. The temperature around the plume was measured and compared to Alpert eq, and was analyzed to be about $2^{\circ}C$ lower at the center axis of the plume and $9.0^{\circ}C$ higher at 8 m in the direction of the discharge of smoke. The results of temperature measurements around the plume were lower than the maximum temperature expected in AS 4391 and did not exceed the expected temperature risk caused by the experiment. As with these results, the temperature risk from the progression of hot smoke tests is foreseeable, so it will be available as one of the general evaluation methods for assessing smoke control performance in a parking lot without relevant criteria.

• Journal of Korea Technology Innovation Society
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• v.17 no.1
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• pp.68-94
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• 2014

SMEs in Korea are suffering from severe manpower shortage due to poor incentive system and employees' frequent change of jobs. So far, the government has made continuous efforts to solve these problems, but SMEs still have the same problem. It is critical for SMEs to maintain core employees for long term who can directly contribute to the business performance. However, Korean manpower policies for SMEs has mainly focused on hiring new recruits and attracting experienced high caliber employees to SMEs. Relatively, policies for attracting in-house employees to work for longer term were insufficient. This paper focuses on providing strategic policy options to make core employees stay in the company for longer term. For this, it identifies the concept and features of core employees and reviews the necessity of introducing the Mutual Aid Project. Also, it suggests the way to enhance the effectiveness of policy by analyzing current Mutual Aid Fund programs in Korea.

• Journal of Labour Economics
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• v.30 no.1
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• pp.55-83
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• 2007

This paper examines the welfare aspects of loan-based self-insurance against unemployment, and discusses the scope of government intervention in its provision. This paper deals with these issues in a model where the individuals may experience unemployment shocks frequently to leave little savings for retirement, so that the government may have to provide them with unemployment and retirement insurance benefits during their unemployment and retirement, respectively. We identify the two interesting features in the model: the externality that the self-insurance exerts, upon other social insurances, and the incentive of private sector to provide loans that exerts the externality upon other social insurances. In particular, this paper shows that, although the inefficiency associated with private loan warrants the government provision of loans to unemployed workers, the over-incentive of the private sector to offer loans may reduce the scope of the government intervention. This paper also shows that, unless the inefficiency associated with private loans is high, the private incentive for loans would reduce welfare because of the externality generated by private loans.

• Applied Biological Chemistry
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• v.21 no.3
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• pp.193-196
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• 1978

Wheat quality score index was proposed as a new criterion of wheat_quality for evaluation of the laboratory testing value such as milling rate (Xm), flour ash content (Xa), flour protein content (Xp) and sedimentation value (Xs). 1) Wheat quality score index was expressed as follows; Milling score index (MSI) $=2.3X_m-72.4X_a$ Protein score index (PSI) =$5.2X_p+0.9X_{psi}$ Composite quality score index (QSI) =$0.63X_{msi}+0.37X_{psi}$ 2) The samples with the more than 100 of MSI would be the good milliability, and the samples with more than 100 of PSI would be the good bread making properties, while that with less than 100 of PSI be good pastry type properties. Whereas most of the samples with higher value of QSI would be related to the good milliability and good bread making properties. 3) MSI, PSI and QSI were significantly correlated to the each related quality components.

• Korean Journal of Plant Resources
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• v.12 no.3
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• pp.204-208
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• 1999

We carried out this study to confirm the possibility of C. wilfordii cultivation using crop as a substitute for stake or net, and tested sit support crops, i.e., soybean, peanut, Perilla frutescens var. acuta Kudo, Job's tears, sorghum, and corn compared with net support. Effects of support crops on growth and root yield of C. wilfordii were as follows. Attracting efficiency of vine showed 94∼100% among crops. The number of branches per plant was 1 or 2 more in p. frutescens var. acuta Kudo, Job's tears, and sorghum support than in net support. Fresh root yield per 10a was 919kg in net support, while it was 717kg in P. frutescens var. acute Kudo, 656kg in Job' tears, and 652kg in sorghum support. However, the problem of decreased yield in these support crops could be overcome by cost saving of staking installation and by harvesting support crops. Therefore, C. wilfordii cultivation using P. frutescens var. acute Kudo, Job's tears, and sorghum as support crops showed most effective in labor and cost saving.

• Journal of Korean Society of Transportation
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• v.15 no.1
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• pp.45-62
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• 1997

이 논문은 O-D 접근방법과 P-A 접근방법을 이론적으로 서로 비교한 연구이다. O-D 접근방법은 전통적인 교통수요 4단계 분석기법의 모든 과정에서 통행수 산출을 통행 유출과 통행유인의 개념을 적용하여 O-D 통행량을 사용한 기법으로 정의되었다. 이러한 O-D 접근방법은 우리 나라에서 보편적으로 사용되고 있는 기법이다. P-A 접근방법은 통행 발생, 통행분포, 교통수단선책 분석과정까지 통행생성과 통행유인의 개념을 적용하여 P-A 통행량을 사용한 기법으로 정의되었으며, 노선배경 분석단계에 앞서 P-A 통행량을 O-D 통 행량으로 전환되어져야 한다. P-A 접근방법은 구미국가들에서 보편적으로 사용되는 기법이 다. 이러한 두 접근방법은 통행목적 분류에서 귀가통행이 별도로 분류되어있는가 혹은 아닌 가에 따라 쉽게 구분되어 질 수 있다. 만일 귀가통행이 통행목적의 분류에서 별도로 구분되 어 있으면 O-D 접근방법이 적용되고 있음을 의미하는 것이다. 이 연구는 전통적 교통수요 4단계 분석과정 중 통행발생, 통행분포 및 교통수단선택의 각 분석과정에서 두 접근방법간 의 이론적 차이점을 명확히 비교 분석하고자 하였다. 그러므로써 형태적 통행패턴을 상대적 으로 잘 설명하며 또한 집합적 오차를 상대적으로 초 lth화할 수 있는 기법이 어느 것인가 를 이론적으로 찾고자 하였다. 이 연구에서는 행태적 측면에서 통행패턴을 P-A 접근방법이 더 잘 표현하고 있으며 또한 집합화 오차도 P-A 접근방법이 더 적으므로 P-A 접근방법이 O-D 접근방법보다 이론적으로 더 우수하다고 결론지었다. 또한 이 연구는 통행발생, 통행 분포, 교통수단선택 분석과정이 끝난 후 P-A 통행량에서 O-D 통행량으로 전환하는 것이 통행발생, 통행분포의 분석과정이 끝난 후에 O-D 통행량으로 전환하는 것보다 더 바람직하 다고 추천하였다.

• International Area Studies Review
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• v.13 no.1
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• pp.241-263
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• 2009

This paper explores the impacts of ownership structure on performance of listed firms in China using 1994-2002 data. Using a new ownership classification scheme, this paper analyzes the impact of three factors, the ownership identity, equity ownership by the controlling shareholder, and equity ownership by the minority shareholders, on the performance of firms. Panel regression analysis shows that the firms controlled by the government are outperformed by firms controlled by private owners, supporting the hypothesis that the state pursues political objectives such as excess employment rather than profit maximization or the hypothesis that political interference by the Party or government may cause high political costs. Regression results also show that higher equity ownership by the controlling shareholder improves firm performance in private controlled firms and partially in marketized corporate controlled firms. The results also show that higher equity ownership by relatively large shareholders (from top 2 to top 10 shareholders) leads to better performance in marketized corporate controlled firms and partially in private controlled firms.