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      • Хөгжлийн урт хугацааны бодлогын эдийн засаг, байгаль орчин ба гадаад худалдааны шинжилгээ

        KH,ERDENECHULUUN,TS,BAYASGALAN 단국대학교 몽골연구소 2021 몽골지역연구 Vol.6 No.2

        “Vision-2050” Mongolia’s long-term development policy” is a policy document that has been approved and implemented three times in the last 15 years, but it is not clear whether it has been reviewed. The policy document states that “Sustainable economic growth will reach every citizen, the middle class will prevail, poverty will decrease sharply, the country will form the basis of economic development policy and meet its domestic needs, export will be intensified, investment and savings capacity will be built, and a multi-pillar economy will emerge.” The goal is to make economic growth sustainable, socially oriented, and to generate revenue from the external sector.

      • KCI등재후보
      • Stable emitter followers based on injection-voltaic transistors for power amplifier

        Kh.K. Aripov,Kh.Kh. Bustanov,I. Faziljanov,G. Jalilov,E.V. Ob’edkov,F.R. Nasirkhodjaev 대한전자공학회 2008 ICEIC:International Conference on Electronics, Inf Vol.1 No.1

        The given job is devoted to the solutions which can help to solve the problems of complementary and quasicomplementary emitter followers’ circuits’ stability on the basis of bipolar transistors (BT) under destabilizing factors. On the basis of new schematic approaches, with usage of injection-voltaic effect in bipolar transistors, it is possible to realize circuits with the expanded range of steady job at increase of temperature and power supplies voltages values.

      • KCI등재
      • KCI등재

        Comparative Study of the Effects of X-ray and Electron Radiations on the Optical Properties of the Solid State Nuclear Track Detector (CR-39)

        Raouf Kh. M. Abdel,Hella Kh. M.,Rashad A. M. 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.3

        Recently, the solid state nuclear track detector SSNTD (CR-39) has occupied a very important place at the top of radiation detectors for passive measurements. For this reason, many investigation were done to improve the properties of this detector. In this investigation, the energy gap of that detector was calculated by measuring the transmission at different wavelengths for ten samples. Five irradiated by electrons at different energies and the other five irradiated by X-rays at different energies in the Radiation Unit of the University Hospital of Zagzig University, Zagzig, Egypt. Another sample was used as the standard sample. The transmission for all samples was measured at the National Research Center Al-Doqe, Cairo, Egypt.

      • KCI등재

        제왕절개술후 반흔과 충수돌기에 발생한 자궁내막증 2 예

        최규홍(KH Choi),김희진(HJ Kim),이권해(KH Lee),조태호(TH Cho) 대한산부인과학회 1985 Obstetrics & Gynecology Science Vol.28 No.7

        저자들은 1982년 2월 본 병원에서 한국인의 희귀한 제왕절개술 반흔에 발생한 자궁내막증과 1983년 4월 충수돌기에 발생한 자궁내막증을 각각 경험하였기에 문헌고찰과 함께 보고하는 바이다. We have experienced two cases of endometriosis of which one was found in abdominal wall scar formed after cesarean section and the other in the appendix during explorative laparotomy This paper presents those cases and a brief review of the literatures.

      • KCI등재

        혼합결혼한 한국인 임부간의 그 남편 종족별 산과적 예후

        황기현(KH Hwang),홍경희(KH Hong),김승일(SI Kim),강신명(SM Kang) 대한산부인과학회 1985 Obstetrics & Gynecology Science Vol.28 No.3

        The clinical data presented were based on 300 cases of intermarried Korean- oriental gravid woman admitted into Ewha Womans University Hospital and it was compared with 100 cases of endogamy Korean pregnant woman associated with complications and it is obstetric outcome by the husband ethnic groups during the 8 years period from Jan. 1, 1976 to Dec. 31, 1983. The results obtained were as follows; 1) As to educational attainment of pregnant women, the proportion of wives in Caucasian husband ethnic group, completed high school and primary were 48.5% and 22.5% respectively, whereas the comparable educational level among wives in Black were 25% and 45%. And wives in Korean completed high school and college were 64% and 26%, respectively. Therefore, the samples appear to be representative of woman in somewhat higher socioeconomic strata of Korean husband ethnic group. 2) Obstetric complications were as follows: The most common complication during pregnancy among black ethnic group was S.P.R.M. (spontaneous premature rupture of membranes) (13%), I.U.G.R. (intrauterine growth retardation) (13%), large baby(7%), prematurity (4%), maternal syphilis (4%) and neonatal congenital syphilis (4%). Especially, the incidence of maternal syphilis in Black husband group was high, 4 times that of Caucasian or Korean husband ethnic group. Especially, in Korean husband ethnic group, the rate of toxemia (13%) and hepatitis B virus infection (5.8%) were higher than the other two groups. In Caucasian group, large baby (14.5%), S.P.R.M. (11.3%), I.U.G.R. (7%) and prematurity (6%) were most frequent complications. 3) The incidence of cesarean section in caucasian husband group was 12%, which was slightly higher than the other groups (Black 8%, Korean 9%). The causes of high incidence rate was cephalopelvic disproportion due to heavy neonatal birth weight, 3,832gm, and the rate of large baby weighting 4kg or more (41.6%) was markedly higher than the other two groups (Black 25%, Korean 32.3%). 4) The incidence of smoking mothers during pregnancy in Black husband ethnic group was 44%, which was remarkably higher than other two groups (Caucasian 27.5%, Korean 2%). The birth weight of babies born to smokers was lighter than non-smoking group by an average of 224gm and the difference was statistically significant. (P<0.0008). 5) The incidence of I.U.G.R. in Black husband group (13%) was markedly higher than the other two groups (Caucasian 7%, Korean 1%). The causes of high incidence in Black husband group was considered that mainly due to high incidence of smoking mothers (44%) and infection including syphilis (46%). 6) Mean term birth weight (38th.~42th, week) in Caucasian and Black husband groups were 3,471gm, 3,461gm, respectively and the difference is not statistically significant (P<0.84). But in Black husband group, the mean term birth weight was 3,375gm or somewhat smaller than the other two groups, by an average of 86gm. It was probably due to more incidence of smoking mothers. 7) The incidence of large babies weighing 4kg or more in caucasian husband group was 14.5%, which was higher than the other two groups(Korean 10%, Black 7%). It may be related to the husbands body constitution or diet. 8) The perinatal mortality rate accounted for 14.3 per 1,000 births (2 cases) in black husband ethnic group, 10.8 (7 cases) in Caucasian, 0 in Korean. Almost all of these cases were stillbirth. The most common causes of the perinatal death among Caucasian husband group were low birth weight (28.5%), fatal congenital malformations (28.5%), severe preeclampsia (14.2%), neonatal congenital syphilis (14.2%),or unknown (14.2%). The major cause of perinatal death in Black husband group was neonatal congenital syphilis (50%).

      • KCI등재

        치골자궁저 높이 측정시 검사자간의 변동평가에 따른 3 가지 통게학적 방법의 비교

        남계현 ( KH Nam ),이권해 ( KH Lee ),조태호 ( TH Cho ),이해혁 ( HH Lee ),선우재근 ( JG Sunwoo ) 대한산부인과학회 1991 Obstetrics & Gynecology Science Vol.34 No.11

        1990년 3월 1일부터 3월 31일까지 순천향대학교 의과대학 산부인과 외래를 방문한 임신 20주부터 40주 사이에 무작위로 선택한 41명의 산모를 대상으로 검사자 3인이 치골자궁저 높이를 측정하여 다음과 같은 결과를 얻었다. 1. 검사자 A와 B간의 변동계수는 4.9%였다. 2. 검사자 A와 B간의 상관계수는 0.968였다. 3. 상기방법은 통계적으로 유의한 결과를 나타내지만, 동의한계란 방법으로 조사시 실제 동의한계는-4.3cm에서 2.6cm로 상당한 변동을 나타냈다. 4. 검사방법간의 차이와 제삼의 검사자를 이용하여 조사했을 때도 동의한게는 비슷한 결과를 나타냈다. 치골자궁저 높이의 백분율표를 이용하여 동의한계를 적용할 때 치골자궁저 높이의 측정은 실제 정상태아와 자궁내 태아발육지연아를 충분히 감별할 수 없다는 결론이 나왔으며, 자궁내 태아 발육지연아를 발견하는 선별검사로서, 치골자궁저 높이의 측정은 한계를 갖는다. 우리는 검사자간의 변동을 조사시, 상관계수나 변동계수를 이용하는 것보다 동의한계를 이용해 검사하는 것이 타당하다고 결론지었다. The measurement of symphysis-fundal height has been considered a simple and attractive screening method to detect the intrauterine growth retardation. Yet examination of published reports of fundal height measurement show wide variation in its performance. One possible reason for this wide variation is inter-observer variation. So, we assessed the variation by three statistical methods-the coefficient of variation, the correlation coefficient, and the limits of agreement. 1. The coefficient of variation between observer A & observer B was 4.9%. 2. The correlation coefficient between observer A & observer B was 0.968. 3. Above methods were highly significant statistically but, the limits of agreement were very wide and true limits of agreement were-4.3 to 2.6cm. 4. When the method of measurement was imperfect was tested, and when one of the observers was not good was tested, the results were similar to above results. Applying these limits to centile charts of symphysis-fundal height shows that the fundal height cannot be measured by different observers with sufficient agreement to seperate small fundal heights of those which are not small, and this severely limits the usefulness of measurement of the symphysis-fundal height as a screening test for intrauterine growth retardation. We conclude that inter-observer variation should be assessed by the method of limits of agreement, and not by calculating the coefficient of variation or the correlation coefficient.

      • KCI등재

        Flexural behavior of concrete beams reinforced with different types of fibers

        Hind M. Kh,MustafaOzakca,Talha Ekmekyapar,Abdolbaqi M. Kh 사단법인 한국계산역학회 2016 Computers and Concrete, An International Journal Vol.18 No.5

        Enhanced tensile properties of fiber reinforced concrete make it suitable for strengthening of reinforced concrete elements due to their superior corrosion resistance and high tensile strength properties. Recently, the use of fibers as strengthening material has increased motivating the development of numerical tools for the design of this type of intervention technique. This paper presents numerical analysis results carried out on a set of concrete beams reinforced with short fibers. To this purpose, a database of experimental results was collected from an available literature. A reliable and simple three-dimensional Finite Element (FE) model was defined. The linear and nonlinear behavior of all materials was adequately modeled by employing appropriate constitutive laws in the numerical simulations. To simulate the fiber reinforced concrete cracking tensile behavior an approach grounded on the solid basis of micromechanics was used. The results reveal that the developed models can accurately capture the performance and predict the load-carrying capacity of such reinforced concrete members. Furthermore, a parametric study is conducted using the validated models to investigate the effect of fiber material type, fiber volume fraction, and concrete compressive strength on the performance of concrete beams.

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