• 한국광학회지
• /
• 제22권5호
• /
• pp.223-229
• /
• 2011

1.5 ${\mu}m$ 통신파장 대역 단일광자의 효율적인 측정을 위해서 PPLN WG(periodically poled $LiNbO_3$ waveguide)에서 준위상정합을 이용한 합주파수 생성에 의한 주파수 상향변환 검출기를 구성하고 검출 효율, 잡음 계수 및 타이밍 지터를 측정하였다. 974 nm에서 발진하는 펌프광의 세기가 300 mW일 때 최대 검출효율이 약 7%, 잡음 계수율은 약 480 kHz로 측정되었다. 피코초펄스 레이저를 이용한 자발적 매개하향변환에서 발생한 펄스형 단일광자 신호를 이용하여 측정된 주파수 상향변환 검출기의 최소 타이밍 지터는 약 39.1 ps였다. 또한 아주 좁은 동시계수 시간 폭으로 펄스형의 주파수 상향변환된 단일광자를 측정하면 잡음의 효과를 최소화할 수 있고, 신호대 잡음비의 특성을 최대로 높일 수 있다.

• 종양간호연구
• /
• 제10권2호
• /
• pp.210-217
• /
• 2010

Purpose: This survey was aimed to examine the current dietary restrictions practices for neutropenic patients among hospitals with 500 and more beds. Methods: Self-administered questionnaires were sent to 100 head or charge nurses of oncology or hemato-oncology wards by mail during October 2009, and 51 questionnaires were returned. The data were analyzed with descriptive statistics using SPSS (WIN version 12.0). Results: Of the hospitals surveyed, 47.1% (n=24) had guidelines on the dietary restrictions, and 80.4% (n=41) placed patients with neutropenia on restricted diets. The major decisional criteria of the dietary restriction was absolute neutrophil count (30.5%) and cooking status (29.2%). The most commonly restricted foods were raw fish or fresh meat (98.0%), uncooked intestine (98.0%), raw eggs (98.0%), draught beer (96.1%), and fresh fruits or vegetables (86.3%). Conclusion: The results showed variation in pattern of dietary restrictions and lower rate of guideline among hospitals, so that the need for the standard dietary restriction guideline is high. However, the role of diet in the development of infection in neutropenic patients is still unclear, which makes it difficult to establish dietary restriction guideline. Therefore, additional research are required to identify the relationship between dietary factors and infections.

• 수산해양교육연구
• /
• 제28권4호
• /
• pp.957-970
• /
• 2016

This study diagnosed the status of marine environmental impact assessment(MEIA) for project near the habitat of marine protected seagrass species such as Zostera caespitosa, Zostera asiatica, Phyllospadix iwatensis. For the preparation of a marine environmental impact statement, different monitoring parameters are used without any specific guideline for the assessment of current status. And also, both tools and techniques for MEIA are needed to improve for implementing. The monitoring plans and parameters are not considered well with the accuracy of the environmental predictions and effectiveness of any applicable mitigation measures. This study suggested the reasonable standard of the MEIA for the conservation of the marine protected seagrass species which have the habitat located near affected area. The inshore seagrasses need to be monitored including shoot count based on the "No Net Loss of Seagrass" as part of the monitoring parameters to assess the status of marine environment of environmental impact statement. In a process of effect prediction, we suggested a concentration of 10 mg/L suspended solids which added by the new developmental project near seagrasses habitat, referring to study of overseas case. But a further study for an appropriate standard is necessary effectively. In a mitigating process, priority needs to be considered in order of avoidance, minimization, reduction, compensation. In a post-monitoring process, it is necessary to monitor the seagrass species abundance to identify the variation of b/a (before and after) project. And in a case of implementing transplantation, survival rate need to be included to determine a success of project.

• Advanced Composite Materials
• /
• 제17권3호
• /
• pp.225-233
• /
• 2008

The analysis in this paper is focused on the pattern of mixing of filaments over a cross-section of hybrid yarns according to different combinations of reinforcement and matrix filament yarns through microscopic view. The volume content of filament in hybrid yarn cross-section was maintained at 50% for both reinforcement and matrix, and the hybrid yarns count at 600 tex throughout the experiments. It was observed from the experiments that diameters of reinforcement and matrix filaments have strong effects particularly on the pattern of mixing of filaments over a cross-section of hybrid yarns such that the hybrid yarns with more or less equal diameters of reinforcement and matrix filaments showed considerably even distributions over the hybrid yarn cross-section. This paper also investigates the possibility of hybridizing carbon/aramid, carbon/glass and aramid/glass matrices through the commingling process. In the experiment, several process parameters were selected and they include pressure, yarn oversupply-rate and different nozzle types. As a result of these experiments, it was concluded that the hybridized materials show better performance than individual reinforced filament yarns in terms of mechanical properties. For small tensile forces, the carbon/glass/matrix combination turned out to be good enough for general purpose applications.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2017년도 춘계학술대회
• /
• pp.595-597
• /
• 2017

현대인들은 편리한 생활방식, 영양과잉, 운동부족 등으로 비만문제에 심각하게 노출되어 있다. 장수를 원하는 인간의 욕망이 클수록 비만문제는 중요한 사회문제가 되고 있다. 사람들은 비만을 개선하기 위해 동네 공원이나 산책로, 등산로 등을 걸으며 운동을 한다. 지자체는 주민들을 위해 산책로나 등산로에 운동표지판을 세워 각종 운동정보를 제공하며 운동을 권장한다. 그러나 기존의 운동 표지판은 붙박이 고정식이라 다양한 운동정보나 건강정보를 제공하지 못한다. 그래서 본 연구는 헬스케어 IT시대에 맞춰 스마트 헬스 스크린을 통한 과학적 운동관리를 제안한다. IT를 기반으로 한 스마트 헬스 스크린은 실시간으로 걸음수, 칼로리소모량 심박수 등의 운동정보를 제공한다. 스마트 헬스 스크린이 제공하는 체계적이고 과학적인 운동관리는 지역주민들에게 개개인에게 맞는 운동량과 강도를 조절할 수 있도록 도와준다. 더불어 특별한 비용 없이 걷기만으로도 건강관리와 비만관리가 가능하게 해준다. 우리의 연구가 비만해결에 작은 도움이 되길 바란다.

• 한국통신학회논문지
• /
• 제31권6A호
• /
• pp.640-647
• /
• 2006

본 논문에서는 IEEE 802.11i 무선 랜 보안을 위한 AES(Advanced Encryption Standard) 기반 CCMP (Counter mode with CBC-MAC Protocol) 코어의 설계에 대해서 기술한다. 설계된 CCMP 코어는 데이터의 기밀성을 위한 CTR(counter) 모드와 인증 및 데이터 무결성 검증을 위한 CBC 모드의 동작이 두개의 AES 암호 코어로 병렬처리 되도록 설계되어 전체 성능의 최적화를 이루었다. AES 암호 코어에서 하드웨어 복잡도에 가장 큰 영향을 미치는 S-box를 composite field 연산 방식을 적용하여 설계함으로써 기존의 LUT(Lookup Table) 기반의 구현방식에 비해 게이트 수가 약 27% 감소되도록 하였다. 설계된 CCMP 코어는 Excalibur SoC 장비를 이용하여 H/W-S/W 통합 검증을 수행하였으며, 0.35-um CMOS 표준 셀 공정으로 MPW 칩으로 제작하고, 제작된 칩의 테스트 결과 모든 기능이 정상 동작함을 확인하였다. 설계된 CCMP 프로세서는 약 17,000개의 게이트로 구현되었으며, 116-MHz@3.3-V의 클록으로 안전하게 동작하여 353-Mbps의 성능이 예상되어 IEEE 802.11a와 802.11g 표준의 MAC 성능인 54-Mbps를 만족한다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제46권3호
• /
• pp.197-203
• /
• 2020

Objectives: We compared the outcomes of two different doses of FK506 (tacrolimus) for immunosuppression in submandibular salivary gland (SMG) allotransplantation. Materials and Methods: Three SMG allotransplantation groups were established (n=6 per group) as follows: allograft rejection control (Allo-Ctrl), low dose (0.08 mg/kg) of FK506 (FK506-L), and high dose (0.16 mg/kg) of FK506 (FK506-H). Allograft survival and rejection were assessed by clinical observation, interleukin-2 levels as determined by enzyme-linked immunosorbent assay, blood sampling for complete blood count (CBC), and histological evaluation. Results: Body weight and anorexia were higher in the FK506-H group but without a significant difference compared with the FK506-L population. CBC revealed a non-significantly reduced number of changes in the FK506-L group. Four glands in the FK506-H group and two glands in the FK506- L group were viable and functioning post-transplantation. Conclusion: The survival rate of allotransplanted glands was higher in conjunction with the high dose of 0.16 mg/kg of FK506, with no major difference in the side-effect profile when compared with the low dose of 0.08 mg/kg short-term outcomes.

• 한국사회복지학
• /
• 제63권1호
• /
• pp.85-111
• /
• 2011

다차원적 빈곤접근에 있어 빈자의 구분방식에는 복합지수방식, 합집합 및 교집합방식이 있는데 이들 방식들은 타당하지 않은 문제들이 있었다. Alkire와 Foster는 이 문제를 해소하는 방법으로 합집합과 교집합의 중간 형태로서 결핍차원들의 개수를 경계선으로 이용하는 차원계수방식을 이론화하였다. 차원계수방식에 의해 우리나라의 다차원적 빈곤을 측정한 결과, 3개 결핍차원을 정책적 차원빈곤선으로 하는 경우 다차원적 빈곤율은 20% 수준으로서 10명 중 2명이 다차원적으로 빈곤하였다. 다차원적 빈곤율이 높은 것은 자산, 소득, 사회보장, 건강 등 여러 차원으로 결핍의 폭이 넓은데 기인하였다. 여성, 한 부모, 노인, 비경제활동인구 등 취약계층일수록 다차원 빈곤의 폭이 넓고 가중되고 있었다. 연구결과 현행 기초생활보장제도가 탈 빈곤유도와 기초생활보장이라는 두 가지 정책목표를 각각 효과적으로 달성하기 위해서는 근로능력 유무에 따라 수급자선정과 지원체제를 이원화하고 차원계수방식을 적용하는 것이 유용하다고 본다.

• 천문학회지
• /
• 제50권1호
• /
• pp.7-20
• /
• 2017

We carry out the study of $850{\mu}m$ sources in a part of the XMM-LSS field. The $850{\mu}m$ imaging data were obtained by the SCUBA-2 on the James Clerk Maxwell Telescope (JCMT) for three days in July 2015 with an integration time of 6.1 hours, covering a circular area with a radius of 15'. We choose the central area up to a radius of 9'.15 for the study, where the noise distribution is relatively uniform. The root mean square (rms) noise at the center is 2.7 mJy. We identify 17 sources with S/N > 3.5. Differential number count is estimated in flux range between 3.5 and 9.0 mJy after applying various corrections derived by imaging simulations, which is consistent with previous studies. For detailed study on the individual sources, we select three sources with more reliable measurements (S/N > 4.5), and construct their spectral energy distributions (SEDs) from optical to far-infrared band. Redshift distribution of the sources ranges from 0.36 to 3.28, and their physical parameters are extracted using MAGPHYS model, which yield infrared luminosity $L_{IR}=10^{11.3}-10^{13.4}L_{\odot}$, star formation rate $SFR=10^{1.3}-10^{3.2}M_{\odot}yr^{-1}$ and dust temperature $T_D=30-53K$. We investigate the correlation between $L_{IR}$ and $T_D$, which appears to be consistent with previous studies.

• 대한지역사회영양학회지
• /
• 제2권5호
• /
• pp.695-700
• /
• 1997

This study was conducted to investigate the effect of an energy restriction program on the weight loss and changes of the biochemical nutritional status for 35 obese women. The energy restriction program took place over a 3-week period that was devided into two parts. The first part consisted of 750-800kcal diet and the second part of 800-1000kcal. Subjects were provided a low energy formula and a menu for the recommended diet. Anthropometric and biochemical measurement before and after the energy restriction program were estimated. Mean weight loss was 3.0kg, accordingly the obestiy rate was lowered from 40.2 to 34.4, BMI from 29.2 to 28.9 and fat weight from 23.3kg to 21.0kg( <0.01. <0.05). Waist circumference loss was most prominent(4.4%) compared to triceps(21% loss)and hip circumference(2.2%loss). Mean RBC count, hemoglobin and hematocrit were significantly lowered( <0.01) but they were in the normal range. Systolic blood pressure was significantly decreased from 124.1mmHg to 113.1mmHg . Mean SGOT and SGPT were lowered from 29.3u/L to 20.0u/L and from 28.7u/L to 16.6u/L, respectively. It seems that the 3 weeks of energy restriction program used in this study was effective in improving anthropometric measurements without producing deficiency of iron or other susceptible nutrients.(Korean J community Nutrition 2(5) : 695-700,1997)