• 한국항행학회논문지
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• 제15권5호
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• pp.749-756
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• 2011

본 논문은 컴퓨터 등 정보기기에 입력되는 문자나 기호의 부호화 규칙을 제시하였다. 문자나 부호를 부호화할 때 본 논문에서 제시하는 규칙을 적용할 경우, 데이터를 전송로에 전송할 때 회선부호화과정에서 발생하는 스크램블링의 발생으로 인한 전송효율이 떨어지는 것을 감소시킬 수 있다. 본 논문에서는 4비트열 ${\times}$ 4비트행의 2 바이트 부호화에 대한 것을 고찰하였다. 본 논문에서는 2바이트(16비트) 원천부호체계로 KS X 1001에 규격화되어 있는 로마 문자용 부호집합에 대한 부호체계를 참고로 하였다.

• 대한전자공학회논문지
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• 제15권2호
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• pp.1-7
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• 1978

이 논문은 한국어 정보원의 구조를 분석하고 기본문자의 출현확율에 따른 KS몰스코오드를 재구성하여 전송속도및 효율을 14%이상 향상시키고 또 앞서 일부 제안된 바 있는 △parameter의 효과와 그것에 의한 한글의 단음절의 자동 식별방법 및 코오드의 개선및 data entry의 합리화에 미치는 영향에 대해서 기술하였다. 아울러 단음절의 자동식별은 13∼16%의 효율을 향상시킨다는 것도 명백히 하였다.

• 한국포장학회지
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• 제6권1호
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• pp.37-40
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• 2000

This study was carried out to investigate dropping shock of household electric appliances during materials handling. Microwave oven($18{\ell}$), TV(16") and washing machine(6.2kg) were singled out as the study items. From the results of dropping test by KS A 1026(General Rules of Performance Testing for Packaged Freights), relative equations were gained as follow : y=0.0863x+10.032 for microwave oven, y=0.136x+7.85 for TV and y=0.214x+5.8 for washing machine (where y is G-factor and x is Dropping height). The maximum values of dropping shock during materials handling were measured to be $11{\sim}14G$ for microwave oven, $12{\sim}15G$ for TV and $10{\sim}12G$ for washing machine. The maximum shocks of microwave oven, TV and washing machine during materials handling were corresponding to dropping shocks of dropping height 45.98cm, 52.57cm and 28.97cm by KS A 1026.

• 품질경영학회지
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• 제15권1호
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• pp.33-46
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• 1987

The present survey was made through mail questionaires aiming at understanding the conditions of quality control, finding problems and making improvement for manufacturing companies located in the Chonbuk area. The conditions of quality control were compared between KS marking companies and non KS marking companies regardless of manufactured products. The main check points were the function of process control, the function of quality assurance, the function of quality survey, the function of quality system, quality education, quality training, the function of QC circle and general functions excepting the scale of enterprise.

• 한국공작기계학회논문집
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• 제14권6호
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• pp.8-15
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• 2005

The new square electro-magnetic chuck, which can be used for the clamping devices on a grinding machine, is developed in this study to improve the convenience of grinding works. The various kinds of structures are recommended to find the most adequate magnetic characteristics through the analytical approach using finite element methods. The analyzed results are retrofitted to solve the drawbacks of previous models step by step by considering the magnetic fields, strength and distribution of drag force, and thermal deformations of chuck such as high parallelism and flatness. Finally the best recommended models is designed to satisfy the KS specifications required fur the commercial magnetic chuck. The prototype chuck with this dimensions and structures is manufactured. For this final model, the experimental verifications are investigated whether the KS specifications are satisfied.

• 천문학회보
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• 제37권2호
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• pp.146.1-146.1
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• 2012

BOAO/KASINICS를 이용한 다주기 변광성들의 적외선 광도곡선 분석 연구의 중간 결과이다. 대표적인 천체인 BL Cam은 SX Pho에 속하며 그 중 가장 짧은 주기로 변광하는 천체이며, 2010년 9월 26일부터 2011년 11월 15일 총 30여 시간 동안 J, H, 그리고 Ks 필터에서 시계열 관측 자료를 얻었고, Period04를 이용하여 주기광도분석을 하였다. 그 결과 $f_0$의 경우 기존 광학 연구의 결과와 매우 근사한 값을 보였고, $f_1$의 경우 Ks 필터 자료에서 36.2137 cycle/day의 값이 검출되었다. 또한, 25 cycle/day와 51 cycle/day 영역에서 여러 개의 파워가 밀집되어있는 미세변광현상이 측정되었다.

• 대한산업공학회지
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• 제16권1호
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• pp.1-15
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• 1990

An AQL type variables sampling system with switching rules is proposed. Comparative studies of existing variables sampling standards - MIL-STD-414, ANSI Z1.9, ISO 3951, and BS 6002 - are made, and simulation studies on switching procedures are conducted. Based on comparative and simulation studies, a variables sampling standard for Korean industry is proposed. The master sampling tables of the proposed standard are taken from the variables standard ANSI Z 1. 9 and the switching rules are matched to the attributes standard KS A 3109 to enable us to move between the proposed variables standard and KS A 3109. Composite OC and ASN curves of the proposed standard are calculated for selected combinations of lot sizes and AQL's and they are compared with those of ANSI Z1.9.

• Journal of Korean Biological Nursing Science
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• 제1권1호
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• pp.100-114
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• 1999

This study was done to investigate the effects of rapidly-rotating shift work of two-day interval on fatigue level and the concentration of urinary 17-KS, $Na^+,\;Cl^-$. The subjects were 20 nursing college students(control group) and 15 nurses in a university hospital and the study was done from Apr. 21 to May 4th, 1999. In the test group, each 5 nurses were allocated to day shift(8 AM-4 PM), evening shift(4 PM-12 MN) and night shift(12 MN-8 AM) respectively. The fatigue level were measured 30 minutes after work start on the 2nd day of work shift. Urine specimens were collected at 8 AM, 4 PM and 12 MN on the 2nd day of work shift in the control group and 30 minutes before and after work on the 2nd day of work shift in the test group. The data were analyzed with SPSS(for Window, ver 7.5). Statistical analysis was performed by using t-test, paired t-test and ANOVA. The results were as follows. 1. The perceived fatigue level in shift work 1) The physical and mental fatigue level were significantly higher in night shift than that in day or evening shift(p<0.05). In the neuro-sensory fatigue level, night shift showed higher tendency than that in day or evening shift, but there were no significant differences between each shifts. 2) Comparison between the control group and the test group: Physical fatigue level was significantly higher in night shift than that in day or evening shift of the control group(P<.001). Mental fatigue level was significantly higher in day or night shift than that in evening shift of the control group(P<.05). In the neuro-sensory fatigue level, test group showed higher tendency than that in the control group, but there were no significant differences between two groups. 3) The total fatigue level was higher in night shift than that in day shift or evening shift(P<.05). In comparing with the control group, night shift and day shift showed higher total fatigue level than that in the control group(p<0.05). 2. The concentration of urinary 17-KS, $Na^+$ and $Cl^-$ In the control group, urinary 17-KS, $Na^+$ and $Cl^-$ showed higher level in afternoon that in morning and night. In the test group, cr in day and evening shift and $Na^+$ in evening shift showed higher level at the end of work. The 17-KS concentration at the begining and the end of work in three shift groups were lower than those in control group(p<0.05), however, $Cl^-$ concentration at the begining of work in day shift, and the end of work in day and evening shift were higher than those in control group(p<0.05). $Cl^-$ concentration at the begining and end of work in night shift were considerably higher than those in control group repectively(p<0.1, p<001). $Na^+$ concentration showed a higher tendency in three shift groups except at the begining of work in night shift, but there were no statistical difference. In comparing concentration of the 17-KS, $Na^+$ and $Cl^-$ among the shift groups, 17-KS concentration showed a lower tendency and $Na^+,\;Cl^-$ showed a higher tendency in night shift: The result of this study showes that biorhythm of shift work nurse was irregular. Fatigue level as the subjective index for evaluating the health problem concerning shift work was higher in night shift and proved to be in accordance with the concentration of urinary 17-KS, $Na^+$ and $Cl^-$ used as objective indices. Disturbation of biorhythm and work stress due to night shift seems to cause the health problem of nurses and decrease of work efficiency. It is considered that work regualtion is necessary for the rational management of the nursing administration.

• 한국건설순환자원학회논문집
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• 제5권4호
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• pp.359-365
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• 2017

본 연구에서는 KS F 2573 콘크리트용 순환골재 기준에 적합한 순환잔골재의 치환율에 따른 콘크리트 특성을 검토하였다. 물리적 특성으로 슬럼프, 공기량, 경시변화, 압축강도에 대한 연구를 수행하였으며, 순환잔골재 재활용 활성화를 위한 기초자료를 제공하고자 한다. 슬럼프 경시변화 실험 결과 순환잔골재의 치환율 증가에 따라 슬럼프 경시변화 감소율은 커지는 것으로 나타났다. 공기량 측정 결과 순환잔골재의 치환율 증가에 따라 공기량 또한 증가하는 것으로 나타났으며, 경시변화의 경우 공기량 감소율은 낮아지는 것을 확인하였다. 반면 100% 치환 시 천연골재콘크리트보다 높은 공기량을 나타내 강도저하가 발생할 것으로 사료된다. 압축강도의 실험 결과 순환잔골재 치환율 증가에 따라 강도저감이 발생했으며, 24MPa 배합 결과 30% 치환 시 천연골재콘크리트와 동등한 강도발현을 나타냈다. 위의 결과를 토대로 순환잔골재 30%치환 시 천연골재콘크리트와 동등한 물리적 특성을 나타내 KS F 2573 콘크리트용 순환골재 기준에 적합한 순환잔골재 치환 시 목표강도 24MPa의 30%가 적합한 것으로 판단된다. 추후 순환골재의 사용 활성화를 위해 순환잔골재 개질을 통한 품질개선이 필요하며, 후속연구로서 개질된 순환잔골재를 이용한 순환잔골재콘크리트의 물리적 특성 평가가 수행되어야 할 것으로 판단된다.

• 유통과학연구
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• 제11권8호
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• pp.15-23
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• 2013

Purpose - This is a case study aimed at finding a solution for improving the pallet loading efficiency in the process of delivering products through a transshipment using the T-11 and T-12 pallet systems. The study proposes a solution by demonstrating the case of a certain manufacturer A, who aims to reduce the logistics cost by using packaging sizes that are commonly applicable and can improve the compatibility between the T-11 pallet system, designated as the standard pallet in Korea, and the T-12 pallet system, which is commonly used in other foreign countries. The use of common sizes increases compatibility among the two systems and reduces both logistics and environmental costs. Thus, this case study calculates the quantitative benefits of applying common packaging sizes to improve the compatibility between the T-11 and T-12 pallet systems. These systems are considered to be the most important and widely used transportation systems in the global logistics industry. Research design, data, and methodology - This study examined manufacturer A's representative product and delivery system and assessed how manufacturer A was affected by the use of incompatible packaging sizes in the T-11 (1100 mm×1100 mm) and T-12 (1200mm×1000 mm) pallet systems, which were specified in the KS T 1002 standard. In addition, this study analyzed the impact of these packaging sizes on A's logistics cost. The TOPS program (Total Packaging System) was used to simulate pallet loading efficiency,and the main parameter studied was volume, as calculated from length, width, and height. Results - When the sizes of secondary packaging were not compatible across the T-11 and T-12 pallet systems, a reduction in loading efficiency was observed, leading to an increase in logistics cost during transshipment. Such low loading efficiencies led to a further loss of efficiency in transportation, storage and unloading. This may have a possible environmental impact with high social expenses, such as increased CO₂ emissions. Hence, this study proposed that the KS T 1002 standard be amended to include 21 packaging sizes, including 7 sizes of the 600 mm×500 mm category, which are compatible with both the T-11 and T-12 pallet systems. Conclusions - This study found that the 69 standard sizes under the T-11 pallet system and the 40 standard sizes under the T-12 system in the KS T 1002 standard can be simplified and reduced to 21 mutually compatible packaging sizes, enabling logistics standardization and reducing national-level logistics costs. If the government pays attention to this study and considers the standardization of common sizes for the T-11 and T-12 pallet systems and amends the KS T 1002 standard, this study will deliver practical value to the global logistics industry, apart from being of academic significance.