• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.251-254
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• 2001

본 논문에서는 ETRI와 연세대가 공동 개발한 AAC/MP3 복합 복호화기 ASIC 칩을 이용한 AAC/MP3 오디오 플레이어의 설계 및 구현에 대해 기술한다. 본 논문에서 사용한 AAC/MP3 복합 복호화 ASIC Chip은 20비트 고정소수점 DSP 코어를 이용하여 MP3와 MPEG-2 AAC LC 프로파일을 복호화하며, MPEG-2 AAC 메인 프로파일을 실시간으로 복호화하기 위하여 허프만 복호화 과정과 예측 과정은 전용 하드웨어 모듈을 이용하였다 이를 이용한 오디오 플레이어는 AAC/MP3 파일 재생 기능, USB를 이용한 호스트 PC와의 인터페이스 기능, Flash 메모리와의 인터페이스 기능 등의 특성을 갖는다.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.621-624
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• 2000

메시지 전달 방식과 공유 메모리 방식은 병렬 컴퓨터 시스템을 위한 대표적인 아키텍쳐이다. 이 중 공유 메모리 방식은 프로그래밍의 용이함으로 인해 메시지 전달 방식에 비해 많이 채택되고 있는 실정이다. 하지만 하드웨어 벤더마다 각기 다른 공유 메모리 프로그래밍 인터페이스를 제공하기 때문에, 코드 호환성이 주 관심사인 경우에는 프로그래밍의 불편함을 감수하면서 MPI 나 PVM 등을 이용한 메시지 전달 구조를 채택하는 경우가 자주 발생한다. 본 논문에서는 공유 메모리 병렬 컴퓨터 시스템을 위한 프로그래밍 인터페이스 표준인 OpenMP 명세에 대해 고찰, 분석한 결과를 제시한다. OpenMP 명세의 등장 배경 및 발전 과정 등을 기술하고, OpenMP 명세의 분분별 규정 내용을 요약한다. 또한 OpenMP 명세에 따라 기존 C 프로그램을 수정한 예도 보인다. 본 논문의 목적은 OpenMP 라는 공유 메모리 프로그래밍 인터페이스 표준을 소개하고, 이에 대한 관심을 높임으로써 관련 연구를 활성화시키는데 있다.

• Journal of the Korea Institute of Military Science and Technology
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• v.15 no.6
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• pp.802-811
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• 2012

This study proposes an OMS/MP preparation methodology using a simulation method instead of a survey method. We applied our methodology to the next generation detection radar, providing reasonable peace- and war-time OMS/MP values. Based on these results, we propose the process to calculate RAM objective values. The previous survey method required to supplement its method since the method used data from a similar weapon system. In addition, the previous method didn't provide enough reliability for the future weapon system. Instead of using the previous survey method, we propose to use war game simulation, which provides a better OMS/MP values. Based on these results, we propose the logical consecutive process that prepares combat and simulation scenarios, peace- and war-time OMS/MP values and RAM objective values.

• The Journal of Engineering Research
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• v.6 no.2
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• pp.131-140
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• 2004

With a rapid development of DWDM and photonic switching, $MP{\lambda}S$ network can realize DiffServ like QOS services using optical wavelength mapping to the traffic flows. In this study, we describe the service connection architecture for providing QOS service between $MP{\lambda}S$ network and network users. We also describe a methodology, which is similar to DiffServ mechanism, to build traffic conditioning blocks that can be used to provide the negotiated QOS services using traffic control components defined by IETF

• Bulletin of the Korean Chemical Society
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• v.17 no.3
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• pp.239-244
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• 1996

Mastoparan B (MP-B) that is a novel MP isolated from the hornet Vespa basalis, was studied as compared with MP, in terms of interaction with phospholipid bilayer and antimicrobial activity. MP-B has more hydrophilic amino acid residues in hydrophilic face of amphiphilic α-helical structure than MP. The both peptides exhibited considerably different effect on interaction with lipid bilayers, e.g. their conformation in the presence of acidic and neutral liposomes, dye-release ability from encapsulated liposomes, but on the whole the interaction mode was similar. On antimicrobial activity, MP had a strong activity against Gram-positive bacteria but no against Gram negative ones. Contrary to this, MP-B had a strong activity against Gram-positive and potent against Gram-negative ones. Since both peptides have almost same residues on the hydrophobic side, such more hydrophilic surface on the molecule seems to lead to the subtle change in its interaction with membranes, resulting in the alternation in its biological activity.

• Journal of Animal Science and Technology
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• v.44 no.5
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• pp.573-584
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• 2002

Milk urea nitrogen (MUN) and Milk protein (MP) are being used as indicators of the protein-energy balance and for actual farm feeding practices. The purpose of this study was to investigate the MUN and MP concentrations of individual cows and bulk tank milk to evaluate the dietary protein-energy balance from lactating Holstein cows. Mean MUN and MP concentrations in the milk samples obtained from 132,636 cows of 4,856 herd during Jan. 1999 to Dec. 2001 were 16.2 5.2mg/dl and 3.30 0.35%, respectively. The highest values were found during summer and lowest valued during winter in MUN. But, the average contents of MP were the highest during winter and the lowest during summer. In order to evaluate protein-energy balance for feeding, we set the level of recommended MP range of 2.90${\sim}$3.29% in early lactation considering a negative energy balance. The recommended level of MP in mid-lactation and late lactation were set as 3.10${\sim}$3.49%, and 3.30${\sim}$3.69%, respectively. Recommended MUN range of 12${\sim}$18 mg/dl was determined through the whole lactation period. Individual cows milk were analyzed by the 9 types based on this levels of MP and MUN in this study. Among the total cows investigated, 26.8%, 25.8%, and 22.2% have shown the recommended criteria of MP and MUN values, respectively. Also, of total herds surveyed, 11.6% had MUN values lower than 12.0 mg/dl and 32.9% had values higher than 18.0 mg/dl and 44.5% of total herd have not met with the recommended criteria of MP values in bulk tank milk. In case of MP, out of the total herd surveyed, 26.0% had MP values lower than 3.10% and 24.0% had values higher than 3.30% and 50.0% had MP values outside the recommended interval (3.1${\sim}$3.3%). This study has indicates that many dairy farms are under improper feeding management practice of the dietary protein-energy balance.

• Journal of Animal Science and Technology
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• v.47 no.4
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• pp.501-512
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• 2005

In Exp. 1, a total of forty eight multiparous sows were used in a 21-d performance assay. All litters were standardized at eleven piglets within 24h of parturition. Sows were fed one of the four experimental diets 1) CON(basal diet; Control), 2) MP1(basal diet added 0.05% of medicinal plant mixtures), 3) MP2 (basal diet added 0.1% of medicinal plant mixtures) and 4) MP3(basal diet added 0.2% of medicinal plant mixtures). Backfat thickness difference from farrowing to weaning was tended to increase in CON treatment compared to those of medicinal plants mixture(MP) treatments. However, there were not significant differences among the treatments(P>0.05). Sow’s ADFI was increased in sows fed MP2 treatment compared to MP3 treatment(P<0.05). Piglet weight gain was tended to increase in MP1 treatment compared to CON treatment(P<0.05). The glucose concentration of MP3 treatment was higher that of CON treatment(P<0.05). Exp. 2, a total of one hundred twenty weaning pigs ($L{\time}Y{\time}D$, 4.70$\pm$0.63kg average initial body weight) were used in a 20-d performance assay. Weanling pigs were fed treatments diets included 1) CON(basal diet; Control), 2) MP0.05(basal diet added 0.05% of medicinal plant mixtures), 3) MP0.1(basal diet added 0.1% of medicinal plant mixtures) and 4) MP0.15(basal diet added 0.15% of medicinal plant mixtures). Through entire experimental period, as MP increased in the diets, there was an increase in ADG(linear, P<0.067), improvement gain/feed(linear, P<0.018) and a decrease in ADFI (linear, P<0.008). DM digestibility was significantly increased with addition of MP(linear, P<0.004; quadratic, P<0.030). In conclusion, sows fed MP2 had showed less body weight loss and increased weight gain for suckling piglet. In weaning pigs, as supplementation MP from 0.05 to 0.1% in diet had improved growth performance and DM digestibility.

• YAKHAK HOEJI
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• v.28 no.3
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• pp.185-190
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• 1984

Protothalipine colorless needle crystal, mp $195-6^{\circ}$, $C_{21}H_{25}NO_{5}$) and jatrorrhizine chloride (Base A, orange needle crystal, mp $198^{\circ}$) are identified by chemical, spectral analysis, and comparison with authentic sample. Base B (reddish crystal, mp $192-4^{\circ}$) might be a artifact substance, which was changed from the jatrorrhizine chloride. Base C (yellowish needle crystal, mp $228~230^{\circ}$) and Base D (reddish needle crystal, mp $211~213^{\circ}$) were assumed to be thalifendine chloride, desoxythalidastine chloride by phytochemical and spectral analysis respectively.

• Korean Journal of Pharmacognosy
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• v.16 no.4
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• pp.233-238
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• 1985

A number of sedative alkaloids were isolated from Sanjoin(酸棗仁), the seeds of Zizyphus vulgaris Lamark var. spinosus Bunge (Rhamnaceae) which is an important Chinese medicinal material used to treat insomnia and sometimes to treat sleepiness. Those compounds were designated as Sanjoinine-A, B, C, D, etc. depending on the order of increasing polarity. Sanjoinine-A, $C_{31}H_{42}N_4O_4$, $mp\;249^{\circ}$, $[{\alpha}]^{27}_D-316$, Sanjoinine-B, $C_{30}H_{40}N_4O_4$, $mp\;212{\sim}4^{\circ}$, Sanjoinene, $C_{29}H_{35}N_3O_4$, $mp\;281{\sim}2^{\circ}$, $[{\alpha}]^{22}_D-272$, Sanjoinine-D, $C_{32}H_{46}N_4O_5$, $mp\;256{\sim}8^{\circ}$, $[{\alpha}]^{22}_D-53.6$, Sanjoinine-F, $C_{31}H_{42}N_4O_5$, $mp\;228{\sim}9^{\circ}$, $[{\alpha}]^{22}_D-215$, and $Sanjoinine-G_1,\;C_{31}H_{44}N_4O_5,\;mp\;236{\sim}8^{\circ},\;[{\alpha}]^{22}_D-68.6$, were found as 14-membered cyclic peptide alkaloids, $Sanjoinine-G_2,\;C_{30}H_{42}N_4O_4,\;mp\;182^{\circ},\;[{\alpha}]^{22}_D-79.2$, as being open chain peptide alkaloid, and Sanjoinine-E, $C_{19}H_{21}NO_2$, $mp\;166^{\circ}$, $[{\alpha}]^{20}_D-146.2$, N-Methylasimilobine, $C_{18}H_{19}NO_2$, $mp\;193{\sim}5^{\circ}$, $[{\alpha}]^{20}_D-204$, Sanjoinine-Ia, $C_{18}H_{19}NO_2$, $mp\;155{\sim}7^{\circ}$, $[{\alpha}]^{20}_D-140$, Sanjoinine-Ib, $C_{19}H_{21}NO_4$, $mp\;184^{\circ}$, Sanjoinine-K, $C_{16}H_{19}NO_3$, $mp\;159{\sim}61^{\circ}$, $[{\alpha}]^{20}_D+35$, Caaverine, $C_{17}H_{17}NO_2$, $mp\;204^{\circ}$, $[{\alpha}]^{20}_D-80$, and Zizyphusine, $C_{20}H_{24}NO_4$, $mp\;214{\sim}6^{\circ}$, $[{\alpha}]^{20}_D+317$ as being aporphine alkaloids. The heat treatment of the cyclic peptide alkaloids produced their isomeric products which showed enhanced sedative activity. The chemical structure of the isomeric products will be discussed.

• Korean Journal of Food Science and Technology
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• v.31 no.5
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• pp.1392-1396
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• 1999

This work was to apply the microwave energy to HTST pasteurization of milk in order to prevent undesirable quality changes due to the fouling and overheating on the surface of heat exchanger. A continuous tubulartype microwave pasteurization system was designed using a domestic microwave oven(800w and 2,450MHz). Raw milk was HTST pasteurized$(at\;72^{circ}C\;for\;15\;sec)$ by three methods; by heating in a stainless steel tube immersed in a hot water bath(MP0), by heating in a microwave cavity to a desired temperature and then holding in a hot water bath(MP1) and by both heating and holding in a microwave cavity(MP2). The microbial quality based on the total plate count and Psychotrophic bacterial count was in the order MP0, MP2 and MP1 ; however, the quality difference was not significant(p<0.05) when the initial microbial numbers were involved in the statistical analysis. In addition, the three samples pasteurized by different methods showed the similar microbial quality based on the coliform count and phosphatase activity. The similar microbial quality of the three samples supports the potential use of microwave energy for the pasteurization of milk and other fluid food products.