• Journal of The Korean Society of Grassland and Forage Science
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• v.17 no.2
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• pp.150-156
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• 1997

This study was carried out to investigate the effects of herbicide treatment on the forage yield, nutrient productivity, weed control and persistency in the Rumex crispus dominated pasture in Suwon and in Youngam kom June, 1993 to October, 1995, respectively. It was arranged as a randomized block design with five treatments : 1. reseeding at middle August, 2. dicamba 2liter /ha+reseeding at early July, 3. dicamba 24liter ha+reseeding at middle August, 4.dicamba 2lliter /ha+reseeding at early July +dicamba 14 /ha and 5.dicamba 24liter /ha +reseeding at middle August +dicamba 1liter/ha. In the Rumex crispus dominated pasture, the treatments of dicamba 2liter ha+reseeding(early July or middle August)+dicarnba 1liter/ha were controlled 77-92% of the weed, and increased 105- 141% of forage yield and were higher 88-141% of energy (TDN and NEL) productivity compared with reseeding at middle August (control), respectively. The results indicated that herbicide treatment was effective for the control of Rumex crisps and renovation of grassland, and higher forage yield could be obtained by twice applications of dicamba.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.42 no.3 s.333
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• pp.35-42
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• 2005

This paper proposes a new reseeding methodology using a variable-rank multiple-polynomial linear feedback shift register (MP-LFSR). In the proposed reseeding scheme, a test cube with large number of specified bits is encoded with a high-rank polynomial, while a test cube with a small number of specified bits is encoded with a low-rank polynomial. Therefore, according to the number of specified bits in each test cube, the size of the encoded data can be optimally reduced. A variable-rank MP-LFSR can be implemented with a slight modification of a conventional MP-LFSR and Multiple Polynomial can be represented by adding just 1 bit to encoding data. The experimental results on the largest ISCAS'89 benchmark circuits show that the proposed methodology can provide much better encoding efficiency than the previous methods with adequate hardware overhead.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.55 no.1
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• pp.8-13
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• 2010

Seedling establishment, overwintering ability and dry matter production of Chinese milk vetch (Astragalus sinicus L. CMV) in natural reseeding practice were compared with the annual seedling in 2006~2007 and 2007~2008. In natural reseeding, CMV seeds were distributed up to 15 cm soil depth in autumn after rice harvest and the seeds generally emerged from soil at less than 5 cm depth while they all emerged from soil surface in the annual seeding. It took 7-8 d longer in seedling establishment of the natural reseeding practice than the annual seeding. Generally, the natural reseeding practice showed higher seedling stand than the annual seeding because of high seedling survival rate. The high seedling survival rate in natural reseeded plant was attributed to the longer root length than that of the annual-seeded plant. In annual seeding, most of the seeds emerged from the soil surface and the root can not easily penetrate the soil while, in natural reseeding technology, the seeds incorporated into the soil during land preparation emerged from the soil at 0 to 5 cm depths, thereby having longer root length. The long root length contributed to greater ability to survive even under low temperature and low soil moisture conditions during winter. The dry matter production in the natural reseeding practice was also higher than the annual seeding when the temperature is low and soil moisture is not sufficient. This result indicates that natural reseeding technology is more stable and beneficial in seedling establishment and dry matter production as compared with the annual seeding especially under unfavorable environmental condition for CMV growth. This practice could be encouraged in CMV-rice cropping system in the southern parts of Korea.

• Journal of The Korean Society of Grassland and Forage Science
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• v.20 no.3
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• pp.215-220
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• 2000

This study was conducted to evaluate the dry matter yield and quality of the before and after renovation of summer depression damaged pasture, and carried out at Chungnam National University ffom 1997 to 1999. The yield of DM in first and second year of after renovation, comparing with those of before renovation(6,547kg/ha), significantly increase obtained 12,291kglha and 13,50Ikg/ha, respectively(P<0.05). In the chemical composition, CP content and DM digestibility were markedly increased comparing with those of before renovation(P<0.05), but the contents of NDF, ADF, cellulose and lignin were decreased respectively(P<0.05). In the botanical composition, weeds after renovation was markedly decreased comparing with before renovation, but increased the percentage of herbage in summer depression damaged pasture. The results from this study, It is proved that a renovation method, which was conducted by two times of reseeding and raking, was effective in recovering botanical composition of herbage, and enhancing productivity and upgrading quality in summer depression damaged pasture. (Key words : Renovation, Reseeding, Summer depression)

• Journal of The Korean Society of Grassland and Forage Science
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• v.28 no.3
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• pp.245-250
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• 2008

On April 4 to 6, 2005, there was a huge fire in Yangyang-gun, Kangwon-do, Korea, which burned over 250ha of forests and 246 buildings including 160 houses. The effects of reseeding rate and timing on productivity and nutritive value of forages in the forest fire burnt pasture in this study were investigated. The effect of reseeding could not be seen in the burnt pastures in terms of forage productivity and quality in short term but there was a long-term effect particularly with higher reseeding rates at later days after the fire on forage botanical composition. We concluded that forest fire brought reduction in pasture forage yield for a short period but it did not make a significant effect for a long term.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.43 no.8 s.350
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• pp.27-34
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• 2006

During Built-In Self-Test(BIST), The set of patterns generated by a pseudo-random pattern generator may not provide sufficiently high fault coverage and many patterns were undetected fault. In order to reduce the test time, we can remove useless patterns or change from them to useful patterns. In this paper, we reseed modify the pseudo-random and use an additional bit flag to improve test length and achieve high fault coverage. the fat that a random tset set contains useless patterns, so we present a technique, including both reseeding and bit modifying to remove useless patterns or change from them to useful patterns, and when the patterns change, we choose number of different less bit, leading to very short test length. the technique we present is applicable for single-stuck-at faults. the seeds we use are deterministic so 100% faults coverage can be achieve.

• Journal of The Korean Society of Grassland and Forage Science
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• v.20 no.3
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• pp.207-214
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• 2000

This study was conducted to investigate the effect of renovation of white clover dominated pasture. It was arranged in a randomized block design with two mixture types: 5-species mixtures(5-SM); orchardgrass 40% + tall fescue 20% + perennial ryegrass 10% + Kentucky bluegrass 10% + red clover 20% and 8-species mixtures(8-SM); orchardgrass 40% + tall fescue 20% + perennial ryegrass 10% + Kentucky bluegrass 5% + redtop 5% + red fescue 5% + alfalfa 5% + red clover 10%. This study was carried out from 1997 to 1999 at Chungnam National University. In the white clover dominated pasture, the DM yield was higher obtained in the 8-SM than that of in 5-SM, but there was no significant difference between 8-SM and 5-SM in both chemical composition and DM digestibility except content of CP. The yields of CPDM and DDM were higher in 8-SM than those in 5-SM as well(P

• KOREAN JOURNAL OF CROP SCIENCE
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• v.54 no.4
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• pp.351-356
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• 2009

Growth, milled rice yield and edible quality of rice in naturally reseeded Chinese milk vetch(CMV)-rice cropping system was compared with those in rice mono cropping on silty loam soil in Milyang from 2006-2008. Practicing natural reseeding technology recorded high CMV reseeding stand ranging from 565-805 plants $m^{-2}$ and resulting in the production of 13.0-17.0 kg N/10a from the CMV plant biomass which is greater than the recommendation rate of 9 kgN/10a. The plant height of rice plant grown in natural reseeding field is shorter at tillering stage but it was similar to the rice mono cropping at later stage. Dry matter production had similar trend to plant height. On the other hand, the leaf color in naturally reseeded CMV-rice cropping system was similar to the rice mono cropping up to panicle heading stage but it was high at mature stage, indicating that the nitrogen was provided by the CMV decomposition until later stage of rice. The yield components such as culm number $m^{-2}$ was greater and 1,000-brown rice weight was heavier than those of rice mono cropping but the ripened grain ratio was lower in naturally reseeded CMV-rice cropping system. Milled rice yield of naturally reseeded CMV-rice cropping system was similar to that of rice mono cropping. However, head rice percentage of milled rice was lower due to low ripened grain ratio. This result indicates that natural CMV reseeding technology can completely replace chemical fertilizer in CMV-rice cropping system.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.54 no.3
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• pp.265-269
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• 2009

Technology development for sufficient dry matter production of Chinese milk vetch (CMV) is most important in CMV-rice cultivation system in order to provide sufficient nutrients to rice plants. However, when the CMV plants are dominated by the weed, especially Alopecurus aequalis, the CMV growth could be reduced due to light and nutrient competition. In addition, A. aequalis is potential host of the rice dwarf virus disease. Therefore, control of A. aequalis is necessary to enhance the biomass production of CMV plants when CMV stands are insufficient. The use of chemical like sethoxydim (20%, ai) showed the highest control rate of 84% at early stage and was reduced as application was delayed. A. aequalis control did not change the CMV seedling stand before and after herbicide treatment and the reseeding stand in fall was rather increased 2.2 to 2.6 times. On the other hand, in untreated control, the CMV stand at May 15 and reseeding stand in fall was significantly reduced as compared with the before herbicide treatment. Control of A. aequalis increased the CMV dry matter production by 164% for 50% CMV coverage rate and 63% for 25% CMV coverage rate. This is equivalent to $12.3{\sim}16.4\;kgN$/10a which is greater than the recommended nitrogen rate of 9kg/10a. The result indicates that the control of A. aequalis is an efficient way to enhance dry matter production in CMV-rice cultivation system especially when CMV stand is poor.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.1169-1172
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• 1998

We designed an ALU(Airthmetic Logic Unit) with BIST(Built-In Self Test), which is suitable for 32-bit DSP RISC processors. We minimized the area of this ALU by allowing different operations to share several hardware blocks. Moreover, we applied DFT(Design for Testability) to ALU and offered Bist(Built-In Self-Test) function. BIST is composed of pattern generation and response analysis. We used the reseeding method and testability design for the high fault coverage. These techniques reduce the test length. Chip's reliability is improved by testing and the cost of testing system can be reduced.