• 대한화학회지
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• 제41권8호
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• pp.392-398
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• 1997

무기수은과 유기수은을 분리하여 각각을 정량하는 방법을 연구하였다. 고분자량 알킬의 4차아민의 염, Aliquat 336의 $CHCl_3$ 용액을 이용하여 수용액 중에 함유된 무기수은이온, $Hg^{2+}$을 티오시안 착이온으로서, 그리고 유기수은 화합물, $CH_3HgCl$ 및 $C_2H_3O_2$ $HgC_6H_5$ 등을 동시에 추출농축한 다음 무기수은은 3 M $HClO_4 $ 용액으로 선택적인 역추출을 하여 CVAAS로 정량하고, 유기수은은 추출액의 $CHCl_3$ 을 증발 제거한 후 그 찌끼를 4% $KMnO_4 $-1M $H_2$$S0_4 $ 용액으로 분해하여 무기수은 이온으로 만들어서 역시 CVAAS로 정량하였다. 시료용액 50 mL 중에 함유된 Hg로서 1 ${\mu}g$의 무기수은과 유기수은 혼합용액(0.02 ${\mu}gHg/mL$)을 분석한 결과 절대오차 ${\pm}6%$ 이내의 결과를 얻었다.

• 한국응용곤충학회지
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• 제8권
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• pp.19-23
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• 1969

질소원, 탄소원을 달리하여 배양한 Fusarium oxysporium f. cucumerinum에 Grand 유제를 농도별로 처리했을 때 균사의 발육신장에 미치는 영향에 대하여 비교 검토한 실험결과를 보면 다음과 같다. (1) Fusarium oxysporium f. cucumerinum은 질소원이 $(MH_4)_2HPO_4,\; NH_4NO_3$인 배지에서 탄소원은 Fructose 배지에서 균사의 발육신장이 양호하였다. (2) 각종 질소원과 탄소원에서 배양한 균을 Grand유각 1,000배액을 처리하면 다같이 균사의 발육이 완전히 조지되었으며 5,000배액에서는 영양원의 종류에 따라 차이가 있어 $NH_4NO_3$배지, Lactose배지, Fructose 배지에서 배양한 균만 생육이 조지되고 기타 영양원에서 배양한 균은 균사의 신장은 되었으나 무처리에 비해 어느정도 억제되는것 같다. 10,000배액에서는 모든 종류의 영양원에서 배양한 균이 균사의 신장이 일어났는데 무처리에 비해 생육이 촉진되는 것도 있고 $NH_4NO_3$ 배지, Fructose배지에서 배양한 균은 오히려 억제되는 것도 있었다. (3) 이상 연구결과로 보아 Grand유제는 농도와 오이 만할병균이 영양상태에 따라 살균력에 영향을 주는것으로 사려된다.

• Journal of Acupuncture Research
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• 제27권5호
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• pp.35-42
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• 2010

Objectives : The purpose of this study was to analyze the changes of quality of life after reduction of muscluloskeletal pain treated with Korean traditional medicine. Methods : The authors observed reduction of musculoskeletal pain and recorded pain reduction by VAS. And we surveyed SF-36 twice, admission day and one month later and compared each other. Results : 1. Musculoskeletal pain with Korean traditional medical treatment decresed significantly. 2. As patients' musculoskeletal pain reduced, all parts of quality of life increased. Especially, the improvement of Bodily Pain(BP), Physical Function(PF), Vitality(VT), Mental Health(MH), General Health(GH) were statistically significant. Conclusions : Reduction of muscluloskeletal pain improved patient's physical, mental, emotional and social quality of life. But Social Function(SF) and Role Limitation(RP,RE) were less than others, so we need to develop complementary programs.

• 대한전자공학회논문지TC
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• 제43권12호
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• pp.89-94
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• 2006

Mobile IP 에서 이동호스트(Mobile Host)의 움직임은 Correspond Node (CN)가 Home Agent (HA)를 거쳐 통신을 하게 하기 때문에 패킷이 긴 전송경로로 통신하게 되는 원인이 된다. 기존의 방식은 이동호스트 주변의 Foreign Agent (FA)를 Temporary Home Agent (THA)로 생각하여 패킷의 비효율적인 전송을 줄이고자 하고 있다 그러나 기존의 방식에서는 FA가 통신한 적이 없는 THA에서 이동호스트가 이동해 온 경우 핸드오버를 위하여 FA와 THA의 거리를 계산하기 때문에 불필요한 Signaling Cost를 발생시킨다. 본 논문에서는 FA와 THA 간의 계층적 구조를 이용하여 이동호스트가 어디로 이동하더라도 FA와 THA의 거리를 계산하지 않고 자신의 가진 테이블만을 검색하는 Hierarchical Home Agent Handover in Mobile IP(HHH-MIP) 알고리즘을 제안하고자 한다.

• 한방안이비인후피부과학회지
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• 제22권1호
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• pp.157-171
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• 2009

Objective : The face is very important for human communication. So facial palsy patients experience not only physical disturbances but also serious emotional stress. Therefore the focus of treatment must be to not only aid the recovery of objective symptoms but also the improvement of subjective quality of life. However there has not been enough Oriental Medical study in this field until now. Thus this study was begun to suggest a useful index for the treatment of facial palsy. Methods : Grade of paralysis, sequelas, and quality of life were used for evaluation. To evaluate Grade of paralysis, House-Brackman Grade was used as the Gross scale and Kim's Grade was used as the Regional scale. Sequelas were evaluated by muscle contraction, synkinesis, NA, and grade of philtrum tilt. Quality of life was evaluated by SF-36v2, Facial Disability Index, and Vas. Results & Conclusion : 1. The change of grade of paralysis between the early and the present time reveals remarkable improvement statistically. 2. There was a remarkable improvement in all parts of quality of life except several areas of SF-36(RP, RE, MH, VT) 3. In only PF(Physical Function) of FDI, quality of life increased remarkably according to the improvement of grade of paralysis. 4. There is the positive relationship among Kim's grade, HB grade and Synkinesis 2. 5. Synkinesis among sequelas has the greatest effect on quality of life. And muscle contraction, change of NA, and grade of philtrum tilt also affect quality to some extent. 6. There was no remarkable relationship between the period of illness and change of quality of life. 7. Change of NA is shown after 3 months of illness and synkinesis becomes worse after 6 months of illness.

• Food Science and Biotechnology
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• 제18권3호
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• pp.776-781
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• 2009

A putative cyclomaltodextrinase (BHCD) gene was found from the genome of Bacillus halodurans C-125, which encodes 578 amino acids with a predicted molecular mass of 67,279 Da. It shares 42-59% of amino acid sequence identity with common cyclomaltodextrinase (CDase)-family enzymes. The corresponding gene was cloned by polymerase chain reaction (PCR) and the dimeric enzyme with C-terminal 6-histidines was successfully overproduced and purified from recombinant Escherichia coli. BHCD showed the highest activity against ${\beta}-CD$ at pH 7.0 and $50^{\circ}C$. Due to its versatile hydrolysis and transglycosylation activities, BHCD has been confirmed as a member of CDases. However, BHCD can be distinguished from other typical CDases on the basis of its novel multisubstrate specificity. While typical CDases have over 10 times higher activity on ${\beta}-CD$ than starch or pullulan, the CD-hydrolyzing activity of BHCD is only 2.3 times higher than pullulan. In particular, it showed significantly higher activity ratio of maltotriose to acarbose than other common CDase-family enzymes.

• 한국수소및신에너지학회논문집
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• 제11권4호
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• pp.189-202
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• 2000

$AB_2$ type Zr-based Laves phases alloys have been studied for potential application as a negative electrode in a Ni-MH battery. The $AB_2$-type electrodes have a much higher energy density than $AB_5$-type electrodes per weight, however they have some disadvantages such as poor activation behavior and cycle life etc. Nonetheless, the $AB_2$-type electrodes have been studied very extensively due to their high energy density. In this study, in order to develop the cycle life, the Mn of $AB_2$ alloy composition was substituted partially by Mo. The alloys were melted by arc furnace and remelted 4-5 times for homogeneity. The alloy powder was used below 200-325 mesh for experiments. The structures and phases of the alloys were analyzed by XRD, SEM and EDS, and measured the curve of a pressure-composition isotherms. The electrodes were prepared by cold pressing of the copper-coated(25 wt%) alloy powders, and tested by a half cell. The results are summarized as follows. The cycle life was improved with the increase of Mo amount in $Zr_{1-x}Ti_xV_{0.4}Ni_{1.2}Mn_{0.4}Mo_y$(x=0.3, 0.4) and the activation was faster, whereas the discharge capacity decreased.

• 한국통신학회논문지
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• 제27권6C호
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• pp.619-624
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• 2002

본 논문에서는 50%의 duty cycle 출력을 가지며, 디지털 방식으로 분주수를 제어할 수 있는 새로운 분주기 구조를 제안하였다. 그리고 0.25$\mu\textrm{m}$ 2-poly, 5-metal CMOS 공정 파라미터를 이용한 HSPICE 모의실험을 통해서 제안한 주파수 분주기를 이용한 900MHz 주파수 합성기를 설계하였다. 제안한 주파수 분주기의 동작은 0.657m 2-poly, 2-metal CMOS 공정을 사용하여 제작한 칩을 측정하여 확인하였다. 설계한 전압제어발진기(VCO)는 2.5V 전원전압 하에서 900Mh의 충간주파수, $\pm$10%의 동작 범위, 154MHz/V의 이득을 가진다. 또한 모의실험 결과 주파수 합성기의 settling time은 약 $1.5\mu\textrm{m}$이고 짝수와 홀수 분주시 50%의 duty cycle과 820MHz~1GHz의 동작 주파수 범위를 갖으며, 전력소모는 대략 70mW 임을 확인하였다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 춘계종합학술대회
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• pp.113-116
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• 2005

일반적으로 유무선 혼합 망은 유선구간의 종단과 무선구간으로의 데이터 중계를 담당하는 기지국에 다수의 이동 호스트가 접속하여 통신을 하는 구조로 되어있다. 이러한 기지국은 네트워크에서 병목점이 되어 네트워크의 성능저하가 발생하기 쉽다. 이러한 성능저하를 개선하기 위해 여러 프로토콜 계층에서 연구가 진행되고 있다. 그 중에서도 전송계층에서 TCP의 성능개선을 위한 여러 가지 기법이 연구되고 있지만, 대부분 처리율 향상을 위한 것이고 fairness 악화에 대한 대책은 고려되지 않았다. 본 논문에서는, fairness를 개선하기 위한 새로운 알고리즘을 제안하고, ns-2를 이용한 시뮬레이션으로 그 성능을 검증한다.

• Journal of Microbiology and Biotechnology
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• 제11권5호
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• pp.825-830
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• 2001

Escherichia coli, which harbored the ars operon from a plasmid pMH12 of Klebsiella oxytoca D12, showed filamentation due to the expression of ars genes in the presence of arsenite. The continued DNA replication in the absence of cell division was revealed, since nucleoids abound with DAPI appeared to be arranged in chains. In contrast to overexpression of arsA, its frame-shift mutant and knock-out mutant lost filamentation in the presence of arsenite, which suggested that ars-induced division block was dependent on expression of arsA. ArsA-induced division inhibition was not a consequence of an inhibition of DNA replication, and the inability of arsenite to induce an SOS response indicated that arsA-mediated division inhibition was dependent on the expression of the gene product encoded by the minB operon. ArsA is a peripheral membrane protein with an ATP-binding domain, which is homologous to MinD that requires ATP-dependent efflux. These results suggested that ArsA could possibly recruit MinC to the membrane and modulate cytoplasmic FtsZ to block assembly at the middle of the cell.