• Journal of radiological science and technology
• /
• v.35 no.3
• /
• pp.219-226
• /
• 2012

Interventional radiologists are not aware of the potential injury from procedures. The purpose of this study are to evaluate radiation exposure of interventional radiologist from intervention procedures and to develop guideline of the simple methods for decreasing their radiation exposure from intervention procedure. In this study, Dosimeters were used to monitor operator doses of radiation exposure in a broad range of procedures from 20 interventional radiologist during the periods of 3 months. And, we searched protection methods of each interventional radiologist. During TACE procedure, there was using 0.5 mmPb radiation protector decreased average 89.5 % of radiation exposure. Thicker radiation protector provide decreasing radiation exposure. And radiation exposure dose decreased average 47.7 % by using pulse fluoroscopic mode. Therefore, interventional radiologist should wear protective aprons, use active shielding, monitor their doses, and know how to poisoning themselves during the procedure and operate correct of the machines for minimum dose.

• Membrane Journal
• /
• v.19 no.1
• /
• pp.83-88
• /
• 2009

Poly(ether block amide) (PEBA)/poly(dimethyl-siloxane) (PDMS) blend membranes (PEBA : PDMS = 5 : 2, 6 : 1 wt%) were prepared through the solution-casting and phase inversion process in order to demonstrate their superior performance in carbon dioxide separation. PDMS and PEBA (4033) were also prepared by the same method using n-butanol as a solvent. To study the gas permeation properties, the membranes were characterized with SEM and tested with carbon dioxide and nitrogen at $35^{\circ}C$ and pressure ranging from 3 to 5 atm. In conclusion, PEBA/PDMS blend membranes were shown to have selectivity for $CO_2/N_2$ separation that is 4 to 5 magnitudes greater than that of PDMS membrane at 3 atm.

• Journal of Korea Multimedia Society
• /
• v.7 no.2
• /
• pp.223-230
• /
• 2004

A shooting game is all game genres that hit targets through shooting. It include a lot of genres from a flying shot of game room to a personal shooting action game. In this point, a shooting game was regarded it as the origin of all game and it was developed from the early days of game. At present we can meet it in an electronic game room or personal computer, and mobile phone etc.. The popularity of shooting game caused to take aim by simple system, interface, and speedy play. Also it was enticed everyone to enjoy it easily. A shooting games is worked from old like ways until recently and a process of playing game is intuitive than another game. Therefore it popular with a PC player as well as persons of all levels. Beginners can train this game easily through direction such as control way of object, advent way of enemy aircraft and scroll way of background. But as an usability of working and controlling game, beginners of game development can pass over a shooting sense that shout and hit basically. And after design, they will feel that cannot convey realistic effect and thrill etc.. At a result, hitting sense happens to graphic elements and sound. Therefore a measure of effect on these elements is started from analysis of good shooting game. This study was to focus on the advance effect of hitting sense in shooting game through analysis centered for 'the Beetlewing' and '1945 Plus'.

• Journal of Environmental Policy
• /
• v.5 no.4
• /
• pp.51-84
• /
• 2006

The current study suggested plans to maintain excellent natural environment of national parks by prohibiting excessive use and introduced the concept of environment capacity using GIS. This paper is that researches on National Parks in the past studied were mostly on the natural resources, human resources, facilities and visitors as well as standard for management of these issues from individual perspective, this study defined concept of integrated (principle of overlay) carrying capacity. It also estimated environmental ecological conservation value considering ecological conservation and environment-ecological index and estimated visit attraction index based on attraction value of nature and facilities in the parks. And it suggested management index as a management plan for effective analysis and management of carrying capacity. As a result, in case of Mt. Jiri National Park, Grade 5 area requiring inducement occupied 71% while Grade 1 area requiring dispersion occupied 0.1%, which means the necessity of appropriate dispersion in the site. Moreover, this research aims to find a monitoring method, utilizing the concept of ubiquitous, for the continuous systematic monitoring on immense natural resources, facilities, and visitors. The continuable national park management plan was proposed by establishing quantitative, and qualitative objective of the environment capacity from the decision based on GIS public opinions from the gathered information. Through the GIS public opinion system and ubiquitous based technology, I propose the effective management technology method for national park.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.9 no.6
• /
• pp.23-35
• /
• 2014

In developing countries where many of these institutions exist in relatively weak form, the investment pattern of VCs in developing countries may differ from one of VCs in developed countries. Given this situation, the research question of this study is how venture capitals invest new technology based ventures in developing countries. To address the research question, our study employs insight from signaling theory and examines two ways. First, what are the internal value of new technology based ventures and the identity of endorsing organization signaling to venture capitals' investment in developing countries? Second, Do venture capitals play a pivotal role for the growth of new technology based ventures in developing countries? This study then tests these hypotheses using the new technology based ventures in Korea which is regarded as an example of developing countries in Northeas tern Asia. Entrepreneur's prior work experience in a related industry in the human capital variables and collaboration with business groups and certification of venture company in the endorsement variables result in obtaining venture capital's investment and superior new technology based venture's growth whereas entrepreneur's educational level has no effect on venture capital's investment and firm's growth.

• Analytical Science and Technology
• /
• v.23 no.1
• /
• pp.89-96
• /
• 2010

In general, three types of fingerprints could be found at the crime scene: visible, plastic, and latent fingerprints. Examples of visible fingerprint include those made by blood, paint or ink. Plastic fingerprint are made from an impression of the finger on soft material as soap, wax, etc. Latent fingerprint are those of the invisible one to the human eye. Oil-contaminated fingerprints remained in the evidence, that are contaminated with the soybean oil, engine oil, lubricating oil or grease. Oil-contaminated fingerprints are special types of fingerprint evidence but the research for developing method regarding oil-contaminated fingerprints is a few. In this study, ultraviolet light source was employed for untreated oil-contaminated prints and the freeze-dry method with liquid nitrogen for freeze oil residue on the surfaces with sequence of developing oil-contaminated fingerprints with black and magnetic powders, cyanoacrylate (CA) fuming, Basic Yellow 40. The types of oil chosen for the experiment were soybean oil, LSA oil, engine oil and material surfaces selected for the experiment were glass, plastic aluminum plates. The aims of this study were to determine the appropriate developing methods for oil-contaminated fingerprints.

• The Journal of the Korea Contents Association
• /
• v.18 no.8
• /
• pp.287-299
• /
• 2018

This study is primarily aimed at conducting conceptual research that reinforces corporate social responsibility and gives direction to how local firms' CSRs should evolve in line with global CSR core values. To this end, a comprehensive approach was made to the Korean CSR system or standards in terms of research methods, and the direction of development was derived by comparing them with global standards. While the social responsibility activities of Korean companies are still focused on social contribution, CSR activities of global companies take social responsibility not only in various business areas but also in the circumstance surrounding companies, labor, environment and others. In particular, they are conducting stable CSR activities within the value chain of companies. Moreover, the CSR function is required in both the original and the primary sub-contractors and the secondary sub-contractors. This can confirm that the CSR activities of companies contribute to the development of society as they attract better working conditions and a better living environment based on the CSR. Therefore, the CSR direction presented by the study is meaningful and worthwhile in that it can contribute not only to Korean companies' global advancement but also to transform our society into a better society.

• International Journal of Highway Engineering
• /
• v.13 no.4
• /
• pp.167-175
• /
• 2011

Evaluation of fuel consumption for the various road condition and vehicle type is necessary to perform the economic analysis of road construction which is important for the efficient design and management of road. Economic analysis of road should consider the social cost which can be divided into agency cost including initial construction expense, maintenance cost, and so on, and user cost consisting of vehicle operating cost, congestion cost, etc. Since vehicle operating cost depends on the traffic volume, fuel consumption that is a major part of vehicle operating cost will change by traffic volume as well. Fuel consumption is significantly affected by vehicle speed and road condition, especially the roughness. Thus, fuel consumption should be evaluated in terms of road condition, which is not currently considered. In this study, the estimation model of fuel consumption for the passenger cars in Korea has been developed by considering the road condition. First, the relationship between vehicle speed and fuel consumption that is used to calculate the vehicle operating cost for investment evaluation of transportation facility and the initial feasibility study of road construction was investigated. Second, with the consideration of road roughness, fuel consumption of the passenger car was measured. From the measurement, it was found that fuel consumption increased by $80m{\ell}$ per 100km driving as the roughness increased by 1m/km. Therefore, it is recommended that for the economic analysis of road design and management, the fuel consumption should be a function of road roughness.

• Membrane Journal
• /
• v.26 no.1
• /
• pp.76-85
• /
• 2016

Fabrication of polysulfone (PSf) hollow fiber membranes was investigated for the separation of $N_2/NF_3$ gas mixtures, which are emitted from the display and the semiconductor industries. A combination of the non-solvent induced phase separation (NIPS) and the vapor-induced phase separation (VIPS) technique was applied to develop high flux hollow fiber membranes. Thin polymer layers were further coated onto the surface of the hollow fiber membranes by using polydimethylsiloxiane (PDMS) or Teflon AF1600(R), which contributes to improve the $N_2/NF_3$ selectivity. The $N_2/NF_3$ separation performances of our PSf hollow fiber membranes were determined by the intrinsic properties of coating materials. Especially, the PSf hollow fiber membrane coated with Teflon AF 1600(R) exhibited a higher $N_2/NF_3$ selectivity (> 14) with a slightly lower $N_2$ permeance (4.5 GPU), as compared to the commercial PSf counterparts. This feature provides a good potential as a membrane structure to separate $N_2/NF_3$.

• 한국사회복지학회:학술대회논문집
• /
• 2004.10a
• /
• pp.223-250
• /
• 2004

In this paper, the proposing a fundamental data for a systematic and effective organizational management by examining the extent of the levels of conflict perceiving among individuals of social welfare workers in the Busan community social welfare center, a social welfare organizations, and investigating the related influencing factors are the purpose of the study, The summary of this study is as follows. At first, it is dysfunctional when the level of conflict is either exceedingly high or low in the interrelational conflict aspect. However, the social welfare workers' working in the community social welfare center, the extent of individual conflict is relatively low as 2.37 out of 5 points. Secondly, the multi-regression analysis is operated for controlling the population sociological factors and measuring the effectiveness of the conflict factors to the level of conflict. The influencing factors affects the result in the order of greater extent are communication factor, leader's flexibility of leadership factor, spontaneity among personality, confidentiality. As a result, Not like the case that in the technological bureaucratic organizations such as the enterprises or industrial organizations, in the human service organizations including social welfare organizations, these technological bureaucratic paradigm does not applying directly since the material of organization is composed of humans who are given moral values. Therefore, this paradigm should be put as a presupposition of the conflict management strategy. And, the communication among colleagues, learning a reasonable problem solution method, or the chances of education or training for establishing a sound human relationship should be prepared in order to lower the level of the conflict among individuals in the community social welfare department. Furthermore, professional education programs are needed for not only supporting an effective supervision and consultation(consultation with superiors and colleagues), but also, working with confidentiality and pride as a professional.