• Journal of Navigation and Port Research
• /
• v.37 no.1
• /
• pp.15-21
• /
• 2013

This paper investigates the mandatory minimum requirements for certification of officers in charge of a navigational watch on ship specified in the international convention of STCW. The training education and evaluation systems for navigational competence of Korean navy were compared and analyzed. The paper suggests adjustment of the evaluation range, increment of evaluation items, diversification of evaluation types, differentiation of certification-related education by officer's commissioning program in order to improve the PQS system.

• Fire Science and Engineering
• /
• v.28 no.3
• /
• pp.62-71
• /
• 2014

The importance of the firefighting education & Training is being magnified in order to enhance and strengthen a firefighters' ability and to reduce the firefighters' fatality and casualty. Therefore, It is needed to expand the facilities. In this study, with a comparative analysis of the global firefighting education & training facilities for fire suppression, we try to present the necessity and the basic contents of the establishing the installation criteria for the domestic firefighting education & training facilities. It has to contain specific purpose of the training and minimum standards for the structures with a guarantee of an international level. Naturally, the top priority is a safety of trainees and trainers. And, it should pay attention to a higher effectivity of the training course with a active reflection of the standard operation procedures' scenarios. Simultaneously, by securing a similarity and a compatibility to the other standards, it must maintain the balance of a whole standard.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.47 no.3
• /
• pp.241-247
• /
• 2011

Marine casualties of vessel are said to be in most case caused by human error, but it would be valid for the assumption that the ship is built with high quality and then should be acceptable to the safety standards. It means that the inherent characteristics of a ship should be the first consideration on the safety of ship. Therefore it is basically necessary for navigator to grasp the inherent stability of his ship and ensure that the ship complies with the minimum statutory standards of stability. This study is to realize the stability of the Korean offshore large purseiner varying with loading conditions by the inclining data and some calculations. The author compared the stability of the ship with IMO criteria and domestic rule, and proposed some improvement for the safety of the ship. The results are summarized as follows ; The values of GM of the ship according to the loading condition in navigation satisfy both of the IMO criteria and the domestic rule, but in case of the area under the GZ curves between the heel angles of $30^{\circ}$ and $40^{\circ}$, and the heel angle occuring the maximum righting lever not satisfy the IMO rule at the fishing ground departure and arrival conditions in the haul in net situation. The initial metacentric height of the ship is very large, but the range of stability and the occurring angle of the maximum GZ are very small, so even small inclining can bring about the beam end. The best method of improvement for that is to increase the freeboard of the model among the variables.

• Journal of the Korean Vacuum Society
• /
• v.15 no.1
• /
• pp.24-30
• /
• 2006

Integrated cavity output spectroscopy(ICOS) is a simple, non-intrusive absorption measurement technique that can detect and quantify trace-level gas species. The spectral absorbance of a gas is quantified from the integrated optical output of the modulated high-finesse cavity containing the sample which is irradiated by a wavelength-swept laser source. We constructed an experimental setup by using a tunable single mode external cavity diode laser operating at the wavelength near 765 nm and a Fabry-Perot cavity with length modulation achieved by a piezoelectric transducer where one of the cavity mirrors sat on. In the experiment performed on minute oxygen gas at the wave-length near 764.5nm, we demonstrated the minimum detectable absorption of $8.45\times10^{-8}cm^{-1}$.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.21 no.5
• /
• pp.90-98
• /
• 2007

The objective of this investigation was to reveal the cause of the faulted cable(LV URD(low voltage underground) cable). For the analysis, various types or equipments such as external pattern, thermal pattern, surface structure, thermal analysis, and property distribution were deployed. The international standards and the specification provided by the manufacturer of faulted cable were examined whether it fit the standards. The summary is as follows. (1) Discovered as a factor lowering insulation performance of the faulted cable: minimum thickness of the insulation layer specified by IEC 60502-1 and IEC 60811-1-1 was not fit. (2) Infrared absorption peaks measured by FT-IR spectrometer revealed that the measurements made for the same material did not conform and it is an important basis for proving heterogeneous composition of the insulation material. (3) It was found that PVC bedding was thermally fragile and therefore long term exposure at the site could cause similar fault pattern.

• Magazine of the Korean Society of Agricultural Engineers
• /
• v.17 no.4
• /
• pp.3956-3961
• /
• 1975

In order primarily to establish the working stages in the reclamation works and to- analyze the working characteristics of man-power, the investigations for construction_ works were conducted on Echeon Largescale Reclamation Project Area. The results are summarized as follows; 1. The working chart on reclamation by man-power is Fig.IV-1. 2. The. ratio of actual working time to total varied with the total times, being 1.0 for less than 4 hours but about 0.9-0.83 for more than 5 hours. 3. Felling operations can be classified into three stages as truck-cutting, branch- cutting, and binding-up, of which results are in Table IV-2. The larger the diameter of stands, the more times for both the cutting operations are, but the moving time is constant to be about 15 sec. 4. Stumping and clearing works have the results prepared in Table IV-3. Between the stumping time and the diameter of stands d, there show highly significant positive correlations, expressed as t=2.212d -4.792. The more the ratio of small diameters to total, the more hastily the total hourly working results of each person are increased. 5. Working results for constructing drainage facilities and ridges are in Table IV-5. The labours for placing patches of grass are required more than twice or three times as much as those are showed in the established standards, and such the different results imply more investigation to be necessary. 6. Table IV-6 sholvs the results for plowing andh arrowing, that are less amount thant the standards. Therefore, more inverestigation should be prepared.

• Journal of Navigation and Port Research
• /
• v.36 no.10
• /
• pp.819-824
• /
• 2012

In this paper, mandatory minimum requirements for certification of officers in charge of a navigational watch on ship by international convention on STCW (standards of training certification and watchkeeping for seafarers) were investigated. The training education and evaluation systems for navigational competence of Korean navy were compared and analyzed. As a result, we have confirmed that junior naval officers from Korean midshipmen had the navigational competence based on the STCW convention by analyzing the courses of Korea naval academy, midshipmen life, training exercise systems, and so on. OCS and NROTC provided a curriculum that did not quite meet the standard of the STCW convention. However, it was sufficient for nurturing basic abilities for navigation safety.

• KIEAE Journal
• /
• v.10 no.3
• /
• pp.43-50
• /
• 2010

Natural lighting is directly connected with our mental and physical health. For working or learning effect, the proper natural lighting is required for improving our living conditions. School facilities, especially, are the place where includes students' ordinary activities with learning behaviors during the school years from elementary to high school. This study was carried out for the purpose introducing a basic database in that planning a school by researching on the actual in the natural lighting system of some schools' classroom, estimating, and analyzing through a simulation, which resulted in a method of improving the natural lighting system. As a result of measuring and analyzing Daylight Factor(DF) during the time from 9 am to 3 pm when students are activating in their classroom, generally DF range of the sides near to window and aisle seats zone are not distributed well. Besides, two out of four school which are researched would not reach the standards of the law for school sanitary while rest of the schools meet the standards; Average DF 5% and Minimum DF 2%. And the result of a simulation by RADIANCE program shows the most appropriate DF range when it is applied in variable numbers about an oriehows the- South-east 15, south-east 30, south-east 45, south-west 15, south-west 30, and south-west 45 degrees. When it is applied in the variable numbers about glass transmittance - 60%, 70%, and 80% in condition facing south of a classroom, the result shows that the DF range of 80% transmittance is relatively higher than other glasses in the classroom. Thus, when a school is built, plans for an orientation is necessary for improve of elementary schools' environment with the glass installation which is made for high transmittance and is regarded with the students' activities time.

• Proceedings of the ESK Conference
• /
• 1997.04a
• /
• pp.17-25
• /
• 1997

The evoked potentials for concentrations of solutions of the four qualities of tastes(i.e., sweet, salty, sour, and bitter tastes) were measured. The solution was applied to the chorda tympani nerve located on the left side of the tongue at 20mm from the tip and 15mm left from the center line. The evoked potentials were detected from Cz referred to A1(left lobe) with the ground at the Fpz position. The Maximum potential level and its latency were evaluated. The individual threshold level of concentration of the solutions of four tastes were measured. Artificial saliva was used as a control solution. The evoked positive potentials for four qualities of tastes (i.e., gustatory evokde potentials) were found to be around 150ms by averaging eight responses. The arbitrary concentration of the solutions were presented by the relative concentration, which was the ratio of the arbitrary concentration to the individual threshold level. The characteristic relations between the latency and the relative concentration ;and those between the potential level and the relative concentration were evaluated. These evalutions showed that (1) the latencies for salty and bitter tastes denoted the minimum values due to for the change of relative concentration, and that (2) the latency for sour taste decreased as the relative concentrations increased, while the latency for sweet taste denoted the inverse tendency, Sinificant differences between any two maximum potential levels were not recognized. A response latencies to sucrose were abolished after treatment of tongue by a sweet-suppressing agent.

• The Journal of the Korea Contents Association
• /
• v.14 no.10
• /
• pp.87-100
• /
• 2014

The objective of this study is to explore audience perceptions of and responses to broadcasting deliberation and analyze their characteristics. The study employed factor and cluster analyses to categorize audience perceptions of broadcasting deliberation, resulting in the identification of six types of preferences: strict standards applied to positive deliberation etc. The results indicate that audiences, which can be categorized into three types, are more likely to prefer positive deliberation over broadcasting codes. The ratio of civil compliance to a minimum standard of positive deliberation is higher than ratios involving the other standards that were included in the study. The study applied a range of theories, such as cognitive dissonance, inconsistency of perception and response, and psychological reactance, to examine and distinguish audience perceptions and responses. The study's findings provide valuable information for researchers and interested organizations and can help to lay a cornerstone for systematically classifying audience perceptions and needs in the future.