• Journal of environmental and Sanitary engineering
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• v.16 no.2
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• pp.9-16
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• 2001

If a pollutant invade at liguid and gas, it will be use ozone in order to remove or sterilize. Ozone excessively supply in order to receive satisfactory efficiency. If excessive ozone leave like that, second-problem will be occur. This study used high heater in order to treat occurred ozone. ; the results were as follow : 1. As initial ozone os supplied with $1.789{\;}g/m^3$ : For the 40, 50, 60, 70(V) of electric potential $O_3$ removal efficiency was treated 34.41, 73.78, 98.60, 98.97%(time of operation ; after 5min.). 2. As initial ozone is supplied with $3.645{\;}g/m^3$ : For the 40, 50, 60, 70(V) of electric potential, $O_3$ removal efficiency was treated 1.78, 69.27, 99.18, 98.68%(time of operation ; after 5min.). 3. As initial ozone is supplied with $4.759{\;}g/m^3$ : For the 50, 60, 70(V) of electric potential, $O_3$ removal efficiency was treated 61.29, 99.29, 99.18%(Time of operation ; after 5min.). 4. Used electric power is 15.38, 24.00, 35.29, 46.15(w/hr) at the 40, 50, 60, 70(V) of the electric potential. 5. Regarding electric power and $O_3$ removal efficiency, Used electric pote-ntial economized at 60(V).

• Journal of the Korean Society of Safety
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• v.26 no.4
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• pp.111-119
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• 2011

This study was designed to provide basic data applicable to fire investigation through consideration of combustion products and propose vulnerability of combustibles through analysis of $CO_2$ emission. In order to achieve these research objectives, characteristics of combustion products such as smoke release rate of each part(raw leaves, branches and barks), $CO_2$ emission and ash production were considered targeting on 6 oak species(Quercus variabilis Blume, Quercus aliena Blume, Quercus serrata, Quercus mongolica Fisch, Quercus dentata Sapling and Quercus acutissima) using cone calorimeter and smoke density tester. As a result, it was found that raw leaves release smoke more relatively than branches and barks, when they burn, and that Quercus variabilis Blume has the highest smoke density. Also, Quercus acutissima released CO and $CO_2$ which are respectively, 6.67 times and 1.43 times more than Quercus variabilis Blume with low $CO_2$ emission. In addition, branches released CO and $CO_2$ more relatively. There was a big difference in ash production among raw leaves(3.1 g), branches(10.5 g) and barks(16.43 g). It was identified that Quercus serrata produces ashes which are nearly 9.95 times more than Quercus variabilis Blume. It demonstrates that Quercus serrata contains relatively higher minerals and that Quercus variabilis Blume can leave lots of traces like stain and carbonization, as it releases smoke a lot and it's difficult to predict visibility, when a forest fire breaks out in its community area. It is also considered that smoke particles containing oil in the air leave strain on the surface of a tree, and that CO and $CO_2$ emission increases, when crown fire to burn branches breaks out.

• Journal of Microbiology
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• v.40 no.2
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• pp.104-108
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• 2002

The hazelnut leaf holer (Anoplus roboris Sufr,, Coleoptera: Curculionidae) is a devastating pest of hazelnut and oak trees. It causes approximately 20-30% economic damage to hazelnut production per year in Turkey. In the present study, in order to fond a more effective and safe biological control agent against A. roboris, we investigated the bacterial flora of the hazelnut leave holer, and tested them for insecticidal effects on it. According to morphological, physiological and biochemical tests bacterial flora were identified as Bacillus circulans (Ar1), Bacillus polymyxa (Ar2), Enterobacter sp. (Ar3) and Bacillus sphaelicus (Ar4). Insecticidal effects of bacterial isolates were performed on adult A. roboris. The highest insecticidal effect determined was 67% by B. sphaericus within eight days. The insecticidal effects of the other isolates (Ar1, Ar2 and Ar3) were determined as 33%, 47% and 47% within the same period, respectively.

• Journal of Electrical Engineering and Technology
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• v.6 no.3
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• pp.334-341
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• 2011

This paper presents accurate solutions for nonlinear transcendental equations of the selective harmonic elimination technique used in three-phase PWM inverters feeding the induction motor by particle swarm optimization (PSO). With the proposed approach, the required switching angles are computed efficiently to eliminate low order harmonics up to the $23^{rd}$ from the inverter voltage waveform, whereas the magnitude of the fundamental component is controlled to the desired value. A set of solutions and the evaluation of the proposed method are presented. The obtained results prove that the algorithm converges to a precise solution after several iterations. The salient contribution of the paper is the application of the particle swarm algorithm to attenuate successfully any undesired loworder harmonics from the inverter output voltage. The current paper demonstrates that the PSO is a promising approach to control the operation of a three-phase voltage source inverter with a selective harmonic elimination strategy to be applied in induction motor drives.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.12
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• pp.541-551
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• 2021

One of the most important aspects of any firm is to motivate its employees to go the extra mile. In order to do work properly, people must be motivated. The total effectiveness and efficiency of workers, as well as a company's performance, is directly related to the degree of motivation of those who work there. On the other hand, demotivated personnel do not put much effort and, when they get a better opportunity, leave their places of employment. For Survey, this study used online Google forms to collect data from September 2021 to October 2021. The target demographic for the research was those who worked for Lebanon's private businesses. The poll was conducted in English, the second language of Lebanon. Furthermore, 179 workers (N = 179) were utilized for this research. The research suggests that fun events and support for fun managers enable workers to connect informally and help people know each other better, creating an environment that promotes friendship building. Based on these connected reasons, fun activities and the support of managers for fun are considerably linked to turnover.

• International journal of advanced smart convergence
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• v.9 no.1
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• pp.193-201
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• 2020

The main objective of this study is to investigate the impact of additional modalities on the performance of emotion recognition using speech, facial expression and physiological measurements. In order to compare different approaches, we designed a feature-based recognition system as a benchmark which carries out linear supervised classification followed by the leave-one-out cross-validation. For the classification of four emotions, it turned out that bimodal fusion in our experiment improves recognition accuracy of unimodal approach, while the performance of trimodal fusion varies strongly depending on the individual. Furthermore, we experienced extremely high disparity between single class recognition rates, while we could not observe a best performing single modality in our experiment. Based on these observations, we developed a novel fusion method, called parametric decision fusion (PDF), which lies in building emotion-specific classifiers and exploits advantage of a parametrized decision process. By using the PDF scheme we achieved 16% improvement in accuracy of subject-dependent recognition and 10% for subject-independent recognition compared to the best unimodal results.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.5
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• pp.475-481
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• 2004

This paper presents a force model of the clean tube system, which was developed as a means of transferring air-floated wafers inside a closed tube filled with super clean air. The recovering force from the holes for floating wafers is modeled as a linear spring and thus the wafers motion is modeled as a mass-spring-damper system. The propelling forces are modeled as linear along with the wafer location. The paper also proposes a control method to emit and stop a wafer at the center of a control unit. It reveals the minimum value of the propelling force to leave from the control unit. In order to stop the wafer, it utilizes the exact time when the wafer arrives at the position to activate the propelling force. Experiments with the clean tube system built for the 12 inch wafer shows the validity of the proposed model and the algorithm.

• Journal of Family Resource Management and Policy Review
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• v.14 no.3
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• pp.123-141
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• 2010

Considering recent changes in care policies for children and the elderly, this study assumed that the familialistic characteristics of the welfare state in Korea might differ from those of the past. In order to explore the direction of change in familialism, this study focused on care policies for children under six and for the elderly who are sixty-five and over. Applying Leitner's four types of familialism-implicit familialism, explicit familialism, optional familialism, and de-familialism-to the study, it analyzed both familialization care policies, such as paid parental leave, homecare allowance, tax credit, and de-familialization care policies, including service provision and subsidies. The results of the study showed that care policy for children under 6 displayed the characteristics of "optional familialism," while care policy for the elderly reflected "de-familialism."

• 한국정보컨버전스학회:학술대회논문집
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• 2008.06a
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• pp.89-92
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• 2008

This study analyzed the status and causes for the dropouts of college based on the survey conducted among 14,210 freshmen attending D College, other than the supernumerary special selection, from 2001 through 2005. A significant difference was shown in all items of general characteristics. The dropout rate of women, generally selected and general high school graduated were higher than for men, specially selected and special high school graduated, respectively. The most dropouts were due to Not Return(40.16%), followed by Unenrolled(32.98%), Voluntary Leave(26.05%) and Expelled(0.81%) in order. In the distribution of the central tendency values measured from the entire subjects. the high school records and the days of absence showed a positive skewness. while the college records showed a negative skewness with the data mostly around a higher grade. The standard deviation indicating that the dropouts got the scores higher than those of the continuing students demonstrated that there was relatively insignificant difference in scores between two groups.

• 제어로봇시스템학회:학술대회논문집
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• 1994.10a
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• pp.434-439
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• 1994

Recently neural networks leave been proposed as new computational tools for solving constrained optimization problems because of its computational power. In this paper, the shortest path finding algorithm is proposed by rising a Hopfield type neural network. In order to design a Hopfield type neural network, an energy function must be defined at first. To obtain this energy function, the concept of a vector-represented network is introduced to describe the connected path. Through computer simulations, it will be shown that the proposed algorithm works very well in many cases. The local minima problem of a Hopfield type neural network is discussed.