• KOREAN JOURNAL OF CROP SCIENCE
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• v.25 no.2
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• pp.31-37
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• 1980

To study the photoperiodic affect on agronomic traits of wheat and barley this experiment was conducted under green house with 25 winter wheat. 25 barley. and 21 naked barley varieties. The data suggested that (1) short-culm varieties such as Ephrat, Combine, and Roussalka in wheat and Haganemugi, Musasinomugi and Yongweolyugag in barley, and Wasehadaka, Ichiwase and Cho-chinryac in naked barley (2) early-matured varieties such as Chukoku #81, Suweon #185 and Sekidori #66 in wheat, CI 07296, Olbori and Haganemugi in barley and Wasehadaka, Nagasaki and Kochiwase-hadaka in naked barley and (3) high-yielding potential varieties such as Shinkwang, Backa and Yukseung #3 in wheat, Jecheon #5, CI 07296 and Siyogimugi in barley and Wasehadaka. CI 09867 and Tawungmia 02 in naked barley could be used for breeding materials because of their super-characters and insensitivities to daylength.

• Journal of The Korean Society of Grassland and Forage Science
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• v.21 no.1
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• pp.7-14
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• 2001

This pot experiments was conducted to find out the forage productivity and quality in a grass/clover sward as affected by the application of three different fertilizers; double superphosphate(DS), fused Mg-phosphate(FP), and complex fertilizer(CF) on newly reclaimed hilly soil. This 2nd part was concerned with the contents and yields of mineral nutrients and general components. The results obtained are summarized as follows: 1. The concentrations of P, Ca. Mg, and Na by the forage species were relatively higher in the CF plots than in the FP and DS plots. The yields of mineral nutrients by the forage species were high in the order: CF>FP>DS plots. Especially. these were higher in the ladino clover and mixed forages than in orchardgrass. 2 The contents of crude protein and crude ash were highest with the CF plots, compared with the FP and DS plots. The yields of general components in the ladino clover and mixed forages were apparently highest with the CF plots. whereas these in orchardgrass not showed consistent differences among the plots. It was recognized that the positive effects on the concentrations and yields of mineral nutrients and general components in forages were higher in the order: CF＞FP＞DS plots.

• Microbiology and Biotechnology Letters
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• v.10 no.2
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• pp.79-86
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• 1982

Mucor plumbeus FRI 0007 was grown on media containing starch solely as carbon source, urea as nitrogen source and minerals including magnesium, calcium and iron of different concentration. The ratio of nonpolar and polar lipid of the total lipid produced by the Muror plumbeus FRI 0007 changed by minerals added in the medium and incubation period. The nonpolar lipid content was higher on the medium containing only one mineral rather than 5 minerals and the nonpolar lipid consisted mainly of trig1yceride, free fatty acid and free sterol. The triglyceride content was higher on the medium containing one mineral and decreased with the incubation time lapse. The major fatty acid composition of total, nonpolar and polar lipid were oleic, palmitic and linoleic acid which comprised about 90% of total fatty acids and their compositions changed slightly depending on the minerals added in the medium.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.210-213
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• 2012

The recently developed military system adopts System Engineering for quality insurance. The process of military system's development basically adopts specification(MIL-STD-499) and system engineering(ISO/IEC 15288) that was developed by America. Recently the level of company's capability maturity is granted by measurement and assessment for the level of CMM or CMMI that was developed by Carnegie Mellon University. This article introduces adopted range of process that developed military system adopted additional process of CMM. This article writes range of process for military system that is developing device adopted diverse process in the future.

• Convergence Security Journal
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• v.7 no.2
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• pp.145-154
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• 2007

In this paper, a study on the actuator device technology in guided weapon system development. Hydraulic and pressure, electric motor device had been mostly used, but recently due to high output to weight ratio, pressure actuator device is widely used except for small tactical guided ammunition which needed small power. And now the actuator design concept and technical level is changed because of high mobility of guided ammunition, development of magnetic materials which used new material for requirement of despondence, progress of control and electrodynamics technology, and digitalize and integrity. In this paper we clearly proposed the actuator design criteria and detailed technology development trend for next generation guided weapon system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.2
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• pp.221-227
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• 2019

It has long been known that weapon target assignment (WTA) problem is NP-hard. Nonetheless, an exact solution can be found using Brute-Force or branch-and bound method which utilize approximation. Many heuristic algorithms, genetic algorithm particle swarm optimization, etc., have been proposed which provide near-optimal solutions in polynomial time. This paper suggests polynomial time algorithm that can be obtain the optimal solution of WTA problem for the number of total weapons k, the number of weapon types m, and the number of targets n. This algorithm performs k times for O(mn) so the algorithm complexity is O(kmn). The proposed algorithm can be minimize the number of trials than brute-force method and can be obtain the optimal solution.

• Journal of the Korean Society of Marine Environment & Safety
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• v.20 no.6
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• pp.627-639
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• 2014

In respect of the nutrients cycling in coastal environment, regeneration in bottom layer is one of major source of nutrients. We analyzed the bottom water quality at the 14 stations during 9 years from 2004 to 2012 to investigate the characteristics of nutrients at bottom layer in Jinhae Bay. Concentrations of DIN, DIP and DSi showed the large seasonal variation and were higher in summer. Especially, average concentrations of these nutrients were two times higher in hypoxic season than in normoxic season. In summer, high concentrations of DIN, DIP and DSi caused by regeneration were common feature, but spatial distribution of DSi differ from that of DIN and DIP. DIN and DIP were higher in Masan Bay, while DSi was higher in Masan Bay as well as in center of Jinhae Bay. In comparison with DIN and DIP, DSi was significantly affected by nutrients regeneration at bottom layer in whole season. According to time series analysis, DIN concentration was decreased from approximately $14{\mu}M$ to $6{\mu}M$. This result induce that Si:N ratio at bottom layer in Jinhae Bay changed from approximately 1 to 3.

• Defense and Technology
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• no.6 s.292
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• pp.18-27
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• 2003

우리의 군사기술 개발여건은 선진국에 비해 매우 미흡한 실저응로 국방비 대비 연구개발 투자비는 3-4% 수준으로 이는 선진국의 20-30%에 불과한 낮은 수준이다. 무기 성능의 차이, 특히 군사력의 마비와 와해를 가져왔음을 우리는 이번 이라크 전쟁에서 생생히 볼수 있었다. 현존 전투력을 유지하면서 미래지향적 군사력 건설으 위해서는 국방비가 최소한 GDP 대비 3-4% 수준은 반드시 배분돼야 하며, 점차 5%수준까지 확대되어야만 북한의 위협에 대비하면서 주변 잠재위협으로부터 우리를 지킬 수 있고 이에 부응하는 기술.정보군 건설이 가능하게 될 것이다.

• Defense and Technology
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• no.6 s.292
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• pp.70-79
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• 2003

군 정비창과 방산업체 어느 곳에서 창정비를 하는 것이 효율적인지 판단은 군수지원체제의 효율성, 가동률 향상측면, 경제성 등을 종합적으로 분석하여 결정할 사항이나, 무기체계를 생산하고 정비설비와 기술인력을 확보한 방산업체에서 수행하는 것이 여러 측면에서 효과적이고 바람직할 것으로 판단된다. 외국의 창정비 정책도 자국 소요를 위주로 하는 국가는 생산업체에서 담당하고 있다. 방산업체가 창정비를 하게 되면 생산량 감소에 따른 가동률 높일 수 있고, 창정비 활동을 통하여 핵심 기술인력을 유지하고 성능개량을 통한 기술력도 향상시킬 수 있을 것이다.

• Journal of Nutrition and Health
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• v.36 no.7
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• pp.711-719
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• 2003

The effects of taurine, carnitine or glutamine supplementation on endurance exercise performance along with related fatigue factors were evaluated in male college students in the Department of Physical Education, who's maximal oxygen consumption rates (VO$_2$max) were equivalent to those of endurance athletes. Twenty four subjects were randomly divided into 4 groups (n=6), and given placebo, taurine (4 g/day), carnitine (4 g/day), or glutamine (4 g/day) tablets for 2 weeks. Subjects could run 6.9 min or 9.0 min longer until exhausted on a treadmill at the intensity of 75% VO$_2$max following taurine or camitine supplementation for 2 weeks, respectively, compared to the value measured prior to each supplementation. Glutamine or placebo supplementation did not improve the endurance exercise performance based on the running time until exhausted on a treadmill. Serum lactate concentrations measured 1 hr after the initiation of the endurance exercise, as well as at all-out state tended to be decreased by taurine, carnitine, or glutamine supplementation, and were significantly lowered (43% decrease) by carnitine supplementation (p < 0.05). Taurine supplementation significantly reduced the serum inorganic phosphorus concentration measured at all-out state (14% decrease, p < 0.05), while carnitine supplementation significantly lowered the resting state serum inorganic phosphorus level (20% decrease, p < 0.05). Taurine (32% reduction) or carnitine (23% reduction) supplementation significantly decreased serum ammonia concentration measured at all-out state (p < 0.05). From these results, 4 g/day of taurine or carnitine supplementation appears to improve the endurance exercise performance and related human fatigue factors.