http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
지하수위 분포 모델링을 위한 UNIVERSAL KRIGING 의 응용 : 1 . K 계의 고유 확율함수 1 . Intrinsic random function of order k
정상용 부경대학교 기초과학연구소 1993 기초과학연구논문집 Vol.4 No.-
非正常 확률함수인 지하수위 자료의 추정을 위하여 k계의 고유확율함수(IRF-k)를 이용하였다. IRF-k의 우수성을 판정하기 위해 지하수위 자료가 정상 확률함수라고 가정하여 ordinary kriging과 비교 검토하였다. 교차 타당성(cross validation)에 의하면 IRF-k가 ordinary kriging에 비해서 지하수 분포 추정에 더 적합한 모델이다. 또한 추정치의 통계적 오차에 의하여도 IRF-k가 ordinary kriging에 비해 우수하다. IRF-k와 ordinary kriging은 지하수위 등고선과 3차원 표면 그림에 있어서 차이를 보이는데, IRF-k에 의해 만들어진 도면들이 더 정밀하다. Intrinsic random function of order k(IRF-k) was used to estimate groundwater levels of nonstationary random functions. The accuracy of IRF-k was compared to that of ordinary kriging assuming that the data of groundwater levels compose a stationary random function. Cross validation and statistical errors show that IRF-k is superior to ordinary kriging for the estirnation of water levels. 1RF-k and ordinary krigmg made different contour and 3-D surface maps. The maps of IRF-k are more accurate than those of ordinary kriging.
오상용,임현우,구정완,정치경,윤임중 가톨릭대학산업의학센타 산업의학연구소 1998 韓國의 産業醫學 Vol.37 No.4
In order to study the effect of smoking on pneumoconiosis patients, two forced expiratory spirograms were performed 4 years apart on 35 office workers (Control group) and 86 pneumoconiosis patients. Comparison of ventilatory indices such as FEV₁, ??, and ?? were done by analyzing two forced expiratory spirograms which were measured by Autobox system(Model Cs-828 Fc, Chest Co., Japan). 1. In the initial pulmonary fuction tests there was no significant difference between smokers and ex-smokers in the control group. On the other hand smokers in the patient group showed significantly lower mean value of %FEV₁ compared to ex-smokers(p<0.05). The differences of %FEV₁, ??, ??% during 4 years also showed no significant differences between smokers and ex-smokers in the control group but were significantly lower in smokers compared to ex-smokers in pneumoconiosis patients(p<0.05). 2. Smoking decreased the ventilatory indicies in all pneumoconiosis patients. Also when smoking was continued, decrease of the ventilatory indices was more related to progression than change of type in pneumoconiosis. But there were no significant differences between ex-smokers with non-progressive pneumoconiosis and ex-smokers with progressive pneumoconiosis. 3. When differences in ventilatory indices during 4 years were analyzed according to type or category of pneumoconiosis, comparison of smokers and ex-smokers did not show any regular tendency. With the above considerations it is suggested that smoking has an influence on pulmonary function of the non-progressive pneumoconiosis patients, and progressive pneumoconiosis patients. Furthermore smoking has more deletrious influence on pulmonary function in progressing pneumoconiosis patients than that in stability pneumoconiosis patients. As a result, to prevent worsening of pulmonary function in pneumoconiosis patients, encouraging them to quit smoking is very important.
Doping of Si into GaN nanowires and optical properties of resulting composites.
Xu, Congkang,Chung, Sangyong,Kim, Misuk,Kim, Dong Eon,Chon, Bonghwan,Hong, Sangsu,Joo, Taiha American Scientific Publishers 2005 Journal of Nanoscience and Nanotechnology Vol.5 No.4
<P>Doping of Si into GaN nanowires has been successfully attained via thermal evaporation in the presence of a suitable gas atmosphere. Analysis indicated that the Si-doped GaN nanowire is a single crystal with a hexagonal wurtzite structure, containing 2.2 atom % of Si. The broadening and the shift of Raman peak to lower frequency are observed, which may be attributed to surface disorder and various strengths of the stress. The band-gap emission (358 nm) of Si-doped GaN nanowires relative to that (370 nm) of GaN nanowires has an apparent blue shift (approximately 12 nm), which can be ascribed to doping impurity Si.</P>
Xu, Congkang,Kim, Misuk,Chung, Sangyong,Chun, Junghwan,Kim, Dong Eon Elsevier 2004 Chemical physics letters Vol.398 No.1
<P><B>Abstract</B></P><P>SiGaN/SiO<SUB><I>x</I></SUB>N<SUB><I>y</I></SUB> nanocables and SiO<SUB><I>x</I></SUB>N<SUB><I>y</I></SUB>-based nanostructures on silicon and silica substrates, respectively, have been firstly synthesized via using GaN as a resource of Ga. The silica wafer is mainly responsible for the formation of SiO<SUB><I>x</I></SUB>N<SUB><I>y</I></SUB>-based nanostructures and the intermediate Ga plays an important role in the formation of diverse nanostructures. SEM, TEM, line scan and SAED were employed to characterize as-prepared samples. The growth mechanism of as-prepared samples is also discussed.</P>
Choi, Junghyun,Choo, Jaebum,Chung, Hoeil,Gweon, Dae‐,Gab,Park, Jeunghee,Kim, Hyo Jin,Park, Sangyong,Oh, Chil‐,Hwan John Wiley & Sons, etc 2005 Biopolymers Vol.77 No.5
<P><B>Abstract</B></P><P>Raman spectroscopy has strong potential for providing noninvasive dermatological diagnosis of skin cancer. In this study, confocal Raman microscopy was applied to the dermatological diagnosis for one of the most common skin cancers, basal cell carcinoma (BCC). BCC tissues were obtained from 10 BCC patients using a routine biopsy and used for confocal Raman measurements. Autofluorescence signals from tissues, which interfere with the Raman signals, were greatly reduced using a confocal slit adjustment. Distinct Raman band differences between normal and BCC tissues for the amide I mode and the PO 2− symmetric stretching mode showed that this technique has strong potential for use as a dermatological diagnostic tool without the need for statistical treatment of spectral data. It was also possible to precisely differentiate BCC tissue from surrounding noncancerous tissue using the confocal Raman depth profiling technique. We propose that confocal Raman microscopy provides a novel method for dermatological diagnosis since direct observations of spectral differences between normal and BCC tissues are possible. © 2005 Wiley Periodicals, Inc. Biopolymers 77: 264–272, 2005</P>