• Korean Journal of Food Science and Technology
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• v.23 no.4
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• pp.498-502
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• 1991

The relationships between the textural properties of cooked rice and hot water-solubles of rice or rice flour were studied. The amounts of solubles or soluble amylose among japonica varieties were similar, but those among Tongil type varieties were different. At the same heating conditions, japonica varieties showed higher contents of solubles as well as soluble amylose than Tongil varieties. The solubles and soluble amylose from rice or rice flour showed a negative correlation with hardness but a positive correlation with adhesivess of rice cooked with optimum water.

• Korean Journal of Breeding Science
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• v.50 no.4
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• pp.387-395
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• 2018

This study was conducted to identify DNA markers related to resistance to herbicide containing mesotrione in Tongil type rice. Two Tongil type elite lines; Milyang154 and Suweon382, showed resistance to mesotrione, whereas the others were susceptible at 20 days after mesotrione application, and severe growth inhibition was observed in the remaining 13 lines. As a result of analysis of mesotrione resistance using 190 $F_2$ populations derived from a cross of Hanareum2 (susceptible) and Milyang154 (resistant), the mesotrione resistance locus was shown to be a single dominant gene with a 3:1 segregation ratio ($X^2=1.19$, P=0.31). To identify a DNA marker closely linked to the mesotrione resistance gene, bulked segregant analysis (BSA) was adopted. The DNA marker RM3501 was identified on chromosome 2 with a recombinant value of 0.53 to the mesotrione resistance gene. Mst1(t) was located between SSR (simple sequence repeat) markers RM3501 and RM324 with a physical map distance of 10.2 Mb-11.4 Mb on chromosome 2. The band pattern of agarose gel electrophoresis of the SSR marker RM3501 showed the same segregation pattern with respect to mesotrione treatment in 20 Tongil type varieties and a $BC_2F_2$ segregation population derived from a cross between Unkwang (resistant) and Hanareum2 (susceptible). Thus, the RM3501 DNA marker could be used in breeding programs for Marker Assisted Selection in mesotrione resistant rice breeding.

• 월간 기계설비
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• no.8 s.217
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• pp.41-51
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• 2008

지난 7월 1일부터 개정된 근로기준법령에 따라 상시근로자 20인 이상 사업장은 주40시간제가 적용 되고 있다. 주40시간제 적용은 지난 2004년 7월 1일 이후 사업장 규모에 따라 순차적으로 적용해 왔으며, 지난 7월 1일부터는 20명 이상 사업장까지 확대 적용한 것이다. 그러나 건설현장은 규모가 다른 하도급업체가 혼재하고 있어 주40시간제의 효과적인 적용 및 정착이 어려운 실정이다. 이러한 문제를 해결하기 위해 건설공사 규모에 따라 주당 근로시간을 통일적으로 적용하는 방안이 필요함에 따라 노동부는 건설공사 규모에 따라 주당 근로시간을 통일해 적용하는 '건설공사 등에 대한 근로시간 적용 특례(법 부칙 제5조의2, 영 부칙 제2조)'를 마련하고 관련 내용 및 문답풀이를 담은 업무처리지침을 발표했다. 근로기준법령은 지난 7월 1일부터 시행에 들어갔다.

• The Bulletin of The Korean Astronomical Society
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• v.46 no.2
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• pp.62.3-63
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• 2021

남한과 북한의 천문 R&D 이슈와 협력 방안에 대해 연구하였다. 지난 2015년 과기부 남북과학기술 및 학술협력사업 '남북한 천문분야 활성화 및 협력방안 연구'를 계기로 북한의 천문연구 현황, 천문관측장비, 인력, 발행물, 책자 등의 자료를 수집하고 정리하였다. 이 자료들은 통일부 북한자료센터와 한국과학기술정보연구원 NK Tech에서 소장한 데이터들, 북한출판사 발행 간행물, 중국국가천문대, 네덜란드 레이덴 대학에서 보유한 북한 천문 관련 자료, 조선중앙통신과 노동신문과 같은 북한 언론매체 기사, 미국, 캐나다, 독일의 언론에 소개된 기사, 그리고 인터넷을 통해 수집한 자료들이다. 이 자료들을 통해 북한의 천문연구 현황을 이해하고 R&D 이슈는 무엇인지 살펴보려 한다. 또한, 정부와 과학계에서 진행되고 있는 남북한 연구 협력 노력에 대해서도 논의하려 한다. 이를 통해 북한의 천문연구 현황을 이해하고 남북천문협력 방안에 대해서도 제안하려 한다.

• Korean Journal of Breeding Science
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• v.42 no.2
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• pp.169-180
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• 2010

This study was conducted to investigate characteristics of panicle traits which are important factors affecting yield and grain quality of rice. Twelve panicle traits in 178 Korean rice varieties composed of 160 Japonica type varieties and 18 Tongil type varieties were investigated. Tongil type varieties had longer panicle and thicker neck node than Japonica type varieties. Other traits such as number of total spikelets, total rachis-branches, secondary rachis-branches (SRBs) per panicle, total spikelets on SRBs per panicle, mean number of spikelets on a SRB, and mean number of SRBs per primary rachis branch (PRB) in Tongil type varieties were also higher than in Japonica type varieties. On the other hand, Japonica type varieties were shown to have well exserted panicle and little more mean number of spikelets on a PRB than Tongil type varieties. According to cluster analysis based on 12 panicle traits, 178 varieties were divided into four main groups. Group I had 133 Japonica type varieties and was characterized by relatively well exserted short panicle, small thickness of neck node, few rachis-branches and little sink size than other group. Group II was composed of 24 Japonica type varieties and 6 Tongil type varieties showing medium value and range between Group I and III. Group III included 11 Tongil type varieties and 1 Japonica type variety 'Baegjinju1' characterized by relatively poor exserted long panicle, big thickness of neck node, many rachis-branches and large sink size. Group IV was solely composed of 'Nongan', which had well exserted long panicle, big thickness of neck node, many rachis-branches and large-sink size. In correlation analysis, number of total spikelets per panicle showed very high correlation with the number of total rachis-branches per panicle (r=0.975), number of spikelets on SRBs per panicle (0.962), number of SRBs per panicle (0.959), mean number of SRBs per PRB (0.746) and mean number of spikelets on SRBs (0.738).

• KOREAN JOURNAL OF CROP SCIENCE
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• v.61 no.4
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• pp.227-234
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• 2016

In this study, we analyzed seed storage proteins in order to investigate the main factors related to the eating quality of japonica and tongil-type rice varieties. Sensory evaluation was performed by a trained panel to assess the appearance (color and glossiness), flavor, taste, stickiness, texture, and overall score of nine japonica and three tongil-type rice cultivars. Moreover, the pattern of variation in rice storage proteins was examined by electrophoresis of protein extracts. The electrophoretic pattern of rice proteins showed 16.4 kDa albumin, 26.4 kDa globulin, 34-39 kDa and 21-22 kDa glutelin, and 14.3 kDa prolamin. In terms of storage protein, the varietal differences between japonica and tongil-type rice were found in albumin, globulin, and the ${\alpha}-1$, and ${\alpha}-2$ sub-units of acidic glutelin. Furthermore, the overall sensory evaluation score was observed to be positively correlated with albumin ($0.495^{**}$) and globulin ($0.567^{**}$), and negatively correlated with ${\alpha}-1$ glutelin ($-0.612^{**}$). Therefore, the results indicated that albumin, globulin, and ${\alpha}-1$ glutelin can affect the eating quality of japonica and tongil-type rice varieties, with the latter having lower eating quality than the former.

• Korean Journal of Food Science and Technology
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• v.27 no.1
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• pp.105-111
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• 1995

The relationship betwwen the molecular structure of amylopectin and the texture of cooked rice was investigated using Korean rice [3 varieties of Japonica type and 3 varieties of Tongil type(Japonica-Indica breeding type)]. The molecular structure of rice amylopectin was polymodal and distributed A chain of $\overline{DP}$ 12.4, short B chain of $\overline{DP}$ 20.6, B chain of $\overline{DP}$ 26.3, long B chain of $\overline{DP}$ 45 and super long chain of above $\overline{DP}$ 55. The super long chain of amylopectin was composed of long linear chain with poorly branched chain. Also, the super long chain of amylopectin showed positive correlated with average chain length, inherent viscosity and ${\beta}-amyloysis$ limit$({\%})$, but negative correlated with ${\lambda}max$ of iodine reaction of amylopectin. The structural properties of amylopectin in Japonica type were different from those of amylopectin in Tongil type. In relationship between molecular structure of amylopectin and texture of cooked rice, the average chain length, inherent viscosity, ${\beta}-amyloysis$ limit and super long chain of amylopectin was showed a positive correlation with hardness, but a negative correlation with adhesiveness of cooked rice. The long chain of rice amylopectin is the less, the eating quality of cooled rice was the better. These results suggest that the molecular structure of rice amylopectin could be responsible for the texture of cooked rice.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.1
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• pp.47-55
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• 2017

As preliminary work for the establishment of a harmonized ship hand signal standard, this paper explores the availability of hand signals as a means of shipboard work communication and considers the validity of standardization. Prior to the feasibility study, shipboard work activities that use hand signals were classified based only on ship safety managers' arbitrary decisions. This survey was carried out to measure shipboard workers' willingness to communicate with hand signals and their preferences regarding the institutional standardization of a hand signal framework if they engage in activities classified as relevant. The results of statistical analysis (a t-test and correlation analysis) showed that respondents are willing to accept harmonized hand signals regardless of both their work type (crew/safety supervisors) and work department (deck/engine room) under working situations where hand signals are an available means of communication. In addition, there was a significant difference in the extent of shipboard workers' frequency of hand signal usages between each type of work activity, indicating a significant positive (+) correlation between frequency of usage and preference for standardization. Finally, it was concluded that shipboard work communication would be effectively improved if a follow-up study is carried out to establish prioritized harmonized hand signal standards for port-related work activities, such as crane operation, windlass/winch operation, line movement/delivery and cargo hold operations.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.12
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• pp.5477-5485
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• 2011

This study comparatively analyzed the instrumentation and the voicing structure, which were shown in the film music titled "Star Wars-Main Title" by John Williams(1932~), with analytical technique that the writer mapped out, and aimed to discover the progression principle in orchestration based on the results. Also, it applied a functional part-division method that was classified and distributed into 3 functional parts according to auditory cognitive level as for each of functional elements such as the musical element. And, it made it pattern for the vertical structure and the voicing structure in musical instruments, which were distributed to each functional part based on this, and comparatively analyzed the standard point in a change which were shown according to progression of music, namely, the operating technique. As for the results of this study, first, each theme has specific instrumentation pattern. Unity was emphasized by consistently organizing those things in exposition, reprise, and recapitulation of each theme. To reinforce diversity, an attempt was made such as adding and reducing auxiliary instruments in the middle part and the rear part. Second, even in a change of instrumentation pattern by passage in accordance with a change in theme amid each part, the same instrumental group was organized in the middle part, thereby having maintained unity. Third, to strengthen diversity by clause, which is forming each theme, a continuous change in voicing pattern was created by adding or omitting a part. Fourth, the voicing concentration was maintained the structure of "thinness-thickness" in the whole musical piece. However, in part 2 that is repeated theme 3, diversity was pursued with a unique change of "thickness-thickness." Fifth, in part 4 that is indicated theme 4, the other diversity was intensified with the inverted range in the front part and the middle part. Accordingly, based on the conclusions that were indicated in this work, it is desired to be conducive to understanding the horizontal consideration and the progression principle of orchestration.

• Journal of the Korean Institute of Telematics and Electronics
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• v.10 no.6
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• pp.11-24
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• 1973

A new simple technique for 2-terminal negative resistance cireait analysis and synthesis is developed, by using the equivalent e.m.f. defined as a function of input lotage or current variation. The technique is applied to design 2-terminal junction transistor negative resistance circuits based on the parameter control method. Modeling circuits for SCR, GTO-SCR and SSS are also derived from the proposed transistor negative resistance circuits, and the merits of the modeling circuits are discussed.