• 제목/요약/키워드: point to point (P2P)

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한반도 중부권 지각물질의 구조와 물성연구(2) : 퇴적암류 코아시료의 탄성파 속도와 점재하 강도 비교 (Structure and physical properties of Earth Crust material in the Middle of Korean Peninsula(2) : Comparison between elastic Velocity and point-load of core specimen of sedimentary rocks.)

  • 송무영;황인선
    • 지질공학
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    • 제3권1호
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    • pp.21-37
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    • 1993
  • 석회암, 사암과 셰일의 퇴적암 코아시료를 대상으로 암석의 비중, 공극률, 함수율 등을 구하고 탄성파 전파 속도와 점재하 강도 지수를 측정하였다. 이들 암석물성 사이의 관계로부터 석회암에 대한 밀도와 탄성파 속도의 관계는 $Vp=4085d^2-20747d+303,{\;}V_s=3899d^2-21442d+318$의 다소 곡선 경향을 나타낸다. 또한 밀도가 높은 셰일의 탄성파 속도가 사암에서보다 작으며 이는 셰일의 층리 영향띠문인 것으로 보인다. 석회암, 사암, 셰일의 P파 속도와 S파 소ㄷ도는 대체로 직선 양상을 보여주며 각 관계식은 석회암에서는 $V_s=0.26V_p+1041.6m/sec,{\;}사암은{\;}V_s=0.43V_p+424.2m/sec$, 셰일에서는 r= 0.86으로 나타났다. 석회암에 대한 점재하 강도 시험에 의하면 점재하 강도 이방성을 시료가 다소 호상구조를 보이더라도 뚜렷하지 않았다. $30^{\circ}-60^{\circ}$내외의 변화를 보이는 층리면 경사각은 직경방향과 축방향의 점재하 지수에 큰 영향을 미치지 않은 것으로 생각된다. 점재하 강도 실험결과 점재하강도 지수가 증가하면 P파 속도도 증가하지만 상관관계가 뚜렷하지 않았다.

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MULTIPLICITY OF POSITIVE SOLUTIONS FOR MULTIPOINT BOUNDARY VALUE PROBLEMS WITH ONE-DIMENSIONAL P-LAPLACIAN

  • Zhang, Youfeng;Zhang, Zhiyu;Zhang, Fengqin
    • Journal of applied mathematics & informatics
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    • 제27권5_6호
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    • pp.1211-1220
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    • 2009
  • In this paper, we consider the multipoint boundary value problem for the one-dimensional p-Laplacian $({\phi}_p(u'))'$(t)+q(t)f(t,u(t),u'(t))=0, t $\in$ (0, 1), subject to the boundary conditions: $u(0)=\sum\limits_{i=1}^{n-2}{\alpha}_iu({\xi}_i),\;u(1)=\sum\limits_{i=1}^{n-2}{\beta}_iu({\xi}_i)$ where $\phi_p$(s) = $|s|^{n-2}s$, p > 1, $\xi_i$ $\in$ (0, 1) with 0 < $\xi_1$ < $\xi_2$ < $\cdots$ < $\xi{n-2}$ < 1 and ${\alpha}_i,\beta_i{\in}[0,1)$, 0< $\sum{\array}{{n=2}\\{i=1}}{\alpha}_i,\sum{\array}{{n=2}\\{i=1}}{\beta}_i$<1. Using a fixed point theorem due to Bai and Ge, we study the existence of at least three positive solutions to the above boundary value problem. The important point is that the nonlinear term f explicitly involves a first-order derivative.

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HUGE CONTRACTION ON PARTIALLY ORDERED METRIC SPACES

  • DESHPANDE, BHAVANA;HANDA, AMRISH;KOTHARI, CHETNA
    • 한국수학교육학회지시리즈B:순수및응용수학
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    • 제23권1호
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    • pp.35-51
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    • 2016
  • We establish coincidence point theorem for g-nondecreasing mappings satisfying generalized nonlinear contraction on partially ordered metric spaces. We also obtain the coupled coincidence point theorem for generalized compatible pair of mappings F, G : X2 → X by using obtained coincidence point results. Furthermore, an example is also given to demonstrate the degree of validity of our hypothesis. Our results generalize, modify, improve and sharpen several well-known results.

전작물 수분 소비량 조사 연구(II) (A Study on the Consumptive Use of Irrigated Water in Upland (II))

  • 김시원;최덕수
    • 한국농공학회지
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    • 제27권1호
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    • pp.37-45
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    • 1985
  • To define the amount of consumptive use of upland crops, the moisture consumption characters were investigated with different soil moisture content by soil properties(loam, sandy loam, sand) at the experimental farm of Kon-Kuk University from April 20 to July 20 1984. The results obtained are summarized as follows; 1. Total moisture consumption under bare soil condition had an order of loam> sandy loam> sand and showed an order of pF 1.5> pF2. 1> pF 2.7 by re-irrigation point and the average during the experimental period (92days) was 435. 9mm and the daily average moisture consumption was 4. 7mm. 2. The moisture consumption characters of bare soil plot obtained showed that the amount of irrigation water per one time and the days of intermission increased and, on the contrary, the times of irrigation and the total amount of irrigation water decreased by the increment of re-irrigation point in the same soil 3. Total moisture consumption of spring cabbage under open cultivation showed 528.6 rim in maximum and had an order of loam> sandy loam> sand. In the aspect of rc-irrigation point, it had an order of pFl. 5> pF 2.1> pF 2.7. In case the planning basic year was taken into account, the amount of irrigation water needed for open cultivation was 456. 3 mm and its average daily moisture consumption was 6. 2mm. 4. Total moisture consumption of summer cucumber under open cultivation showed 635. 8mm in maximum and had an order of loam> sandy loam> sand. In the aspect of re-irrigation point, it had an order of pF 1.5> pF2. 1> pF2. 7 In case the planning basic year was taken into consideration, the amount of irrigation water was 516. 9mm and its aversge daily moisture consumption was 6. 5mm. 5. The result of cabbage cultivation showed its maximum yield in loam soil when the pF values were maintained from 1,5 to 2.1 and then the evapotranspiration ratio was 1, 76 and also when the amount of irrigation water were similar, it showed effective to reduce the days of intermtission. 6. The result of cucumber cultivation showed its maximum yield in sandy loam soil when the pF value maintained from 1.5 to 1.7 and when the irrigation point maintained at pF 2,7 in sandy soil, its yield was severely decreased.

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수계분산매체에서 나노 $CeO_2$ 입자의 계면전위 거동 (Surface Potential Behavior of Nano $CeO_2$ Particles in Aqueous Media)

  • 이태원;백운규;최성철;이상훈;임형섭;김철진
    • 한국세라믹학회지
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    • 제37권7호
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    • pp.721-725
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    • 2000
  • In this study, the dispersion stability of nano-sized CeO2 particles, synthesized by hydrothermal method in aqueous was evaluated from observing the surface potential behavior of CeO2 particle synthesized by solid state reaction. The isoelectric point(IEP) of nano-sized CeO2 synthesized by hydrothermal synthesis was found to be pH 9 contrary to the isoelectric point of micro-sized CeO2 synthesized by solid state reaction at pH 6.7. IEP was shifted to pH 2.0 as the addition of D-3019 from 0.1 to 1.0 wt%. The surface potential of CeO2 particles synthesized by hydrothermal synthesis was reduced as the addition of B-1001 used as a binder without change of IEP because the absorption of B-1001 polymer on the CeO2 particles shifted the shear plane of CeO2 particles outward away from the surface. This surface potential behavior was well correlated with the dispersion stability of slurry.

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전치부 후방이동에 따른 연조직 측모 변화의 두부방사선 계측학적 연구 (A CEPHALOMETRIC STUDY ON THE SOFT-TISSUE PROFILE CHANCES FOLLOWING THE INCISOR RETRACTION)

  • 하정국;차경석
    • 대한치과교정학회지
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    • 제24권3호
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    • pp.547-554
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    • 1994
  • This study was carried out in order to find out the soft tissue profile changes associated with maxillary incisor retraction in Angle's class I malocclusion patients. For this study fifty two female adult patients (Maximum Retraction Group 23, Minimum Retraction Group 29) who received orthodontic treatment were chosen. Following conclusions were obtained by analysing the changes of soft tissue and hard tissue before and after treatment. 1. When considering the mean changes of soft tissue and hard tissue, UP, LIP, Ls, Li (p<0.001), Point B, Si (p<0.01), Point A, Ss (p<0.05) were significant posterior movement in Maximum Retraction Group and UIP (p<0.001), LIP, Ls, Li (p<0.01), Point B, Si (p<0.05) were significant posterior movement in Minimum Retraction Group. 2. When considering the correlations between hard tissue and soft tissue changes, greater correlations were found in Minimum Retraction Group between UIP and Ls (p<0.01), Point A and Ss, UIP and Li, Point B and Si (p<0.05) than Minimum Retraction Group. 3. Correlations (p<0.01) were found between upper incisor retraction and posterior movement of the upper and lower lip in Thin Lip-Thickness Group, whereas no significant correlations were found in Thick Lip-Thickness Group. 4. Mean changes of the soft tissue thickness subsequent to incisor retraction were increased (p<0.01) in upper lip (Ls-Ls'), whereas no changes were found in lower lip.

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삼중점과 임계점간 파라수소의 증기압 예측 (Prediction of Vapor Pressure of Parahydrogen from the Triple to the Critical Point)

  • 정재관
    • 대한화학회지
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    • 제45권4호
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    • pp.293-297
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    • 2001
  • 문헌에 보고된 삼중점과 임계점간 기존의 파라수소 증기압 측정값을 이용하여 환원증기압과 환원온도 형태의 아래와 같은 식의 지수와 상수를 구하는데 사용하였다. $lnP_r=2.64-{\frac{2.75}{T_r}}+1.48129lnT_r+0.11T^5_r$ 증기압을 계산하기 위해서 필요한 것은 정상 끓는점($T_b$= 20.268K), 임계압력($P_c$= 1292.81 kPa) 및 임계온도($T_c$= 32.976K)뿐이며 153개 파라수소의 증기압 실험자료에 적용하여 본 결과 전체 평균편차가 0.21% 였다.

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농촌노인의 영적안녕과 희망, 지각된 건강상태에 관한 연구 (A Correlation study on Spiritual Wellbeing, Hope and Perceived Health Status of the Rural Elderly)

  • 김정남
    • 한국보건간호학회지
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    • 제18권2호
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    • pp.342-357
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    • 2004
  • A descriptive correlation study was done to provide a basic data for comprehensive nursing care by analyzing the relationship between spiritual wellbeing, hope and perceived health status of the rural elderly. 130 respondents who lived at their homes and nursing homes for elders in D county. Kyungbuk province were selected and their age was over 60 years old. Paloutzian and Ellison(1982)'s spiritual wellbeing scale. Nowotny(l989)'s hope scale and Northern Illinois University's health self rating scale was used. From September 2nd to September 30th, 2002, ready made questionnaires were handed out by researcher and two well trained nurse research assistants. to those who can fill it out and for those who cannot fill out the questionnaires alone, the researcher and assistants read it and finished by interview. This study used Pearson's correlation coefficient for the hypothetic test and the average point and standard deviation of spiritual wellbeing, hope, and perceived health status were checked. To find out the difference between spiritual wellbeing, hope, and perceived health status by general characteristics ANOVA and Tukey test were used. The results are as follows : 1. The mean score for spiritual wellbeing of the rural elders was $49.94(\pm5.62)$ in a possible range of 20-80. The mean score of religious wellbeing was $25.20(\pm3.91)$ and that of existential wellbeing was $24.74(\pm2.83)$ in a possible range of 10-40. The average point of religious wellbeing was $2.52(\pm0.39)$ points and existential wellbeing was $2.47(\pm0.28)$ points to 4 point full marks. 2. The mean score for hope was $67.68(\pm10.92)$ in a possible range of 29-116. The average point of hope was $2.33(\pm0.38)$ points to 4 point full marks. 3. The mean score for perceived health status was $9.95(\pm2.66)$ in a possible range of 4-14. The average point of perceived health status was $2.15(\pm0.72)$ point to 4 point full marks. 4. In testing the hypothesis concerning the relationship between spiritual wellbeing and hope, there was a statistically positive correlation(r=0.621. p=0.000). 5. In testing the hypothesis concerning the relationship between hope and perceived health status, there was a statistically positive correlation(r=0.305, p=0.000). 6. There were significant differences in spiritual wellbeing according to age(F=5.60, p=0.000), religion(F=11.61. p=0.000), family status(F=2.86, p=0.040) and average monthly pocket money(F=4.32, p=0.015). 7. There were significant differences in hope according to age(F=16.49, p=0.000), religion (F=3.56, p=0.009), educational level(F=8.94, p=0.000), present occupation(t=-3.13, p=0.002), family status(F=5.90, p=0.001) and average monthly pocket money(F=3.41. p=0.036). 8. There were significant differences in perceived health status according to present occupation(t=-2.16, p=0.033) average monthly pocket money(F=4.11, p=0.019). From the above results it can be concluded that: There was a positive correlation between spiritual wellbeing and hope, hope and perceived health status. There was no positive correlation between spiritual wellbeing and perceived health status. For futher study, adequate spiritual wellbeing scale and hope scale for rural elders should be developed and, age and religion factors has to be reconsidered. When the nurse implicate the nursing intervention which can be promote the spiritual wellbeing and hope, rural elder's spiritual wellbeing and hope can be improved and at the same time, their perceived health status also can be improved.

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COUTAND의 C점에 관한 한국인 성인정상교합자의 두부방사선 계측학적 연구 (A ROENTGENOCEPHALOMETRIC STUDY ON THE COUTAND'S POINT C IN NORMAL OCCLUSION FOR KOREAN ADULTS)

  • 양원식
    • 대한치과의사협회지
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    • 제10권12호
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    • pp.831-834
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    • 1972
  • The authors have measured and analyzed the values of Point C from roentgenocephalograms of Korean adults, 51 males and 53 females, with normal occlusion. The results were as follows. 1. The position of Point C was -4.73mm. in male and -4.74mm. in female. 2. In samples of harmonious maxillary and mandibular basal bones, the position of Point C was -4.02mm. in male, while that was -5.33mm. in female, respectively. 3. When N.F.-M.P.A. was become larger, the position of Point C was moved more upward; while M.R.P. was increased larger, it was moved more downward. 4. The position of Point C was depended on the distance form the cross point with nasal floor and mandibular plane to the points A and B.

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단초점 근용 안경의 수평방향 설계점 결정에 대한 이해 (The Understanding of Determination of Horizontal Centration Point of Single-vision Reading Glasses)

  • 김민호;김현일
    • 한국안광학회지
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    • 제14권2호
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    • pp.1-8
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    • 2009
  • 목적: 본 연구는 서로 다른 기준에 따른 P.D로 제작된 근용 안경을 각각 착용시킨 후에 상대적인 피로 정도를 비교하는 것이 목적이다. 방법: 근용 안경의 굴절력[원용 안경의 굴절력(-)]이 (-)인 사람에게는 원용 P.D와 근용 P.D-B로 제작된 안경을 장용시켜 안정피로 정도를 비교하였고, 근용 안경 굴절력이 (+)[원용 안경 굴절력(+)]인 사람에게는 근용 P.D-B, 원용 P.D, 근용 P.D-A로 조제된 안경을 장용시켜 안정피로 정도를 비교하였다. 근용 P.D-A란 원용 안경의 근거리 시점에서 발생한 기저외방의 프리즘 값과 근용 안경의 시점에서 발생한 프리즘 값이 같도록 감소된 단초점 근용 안경의 중심점간 거리를 의미한다. 결과: 근용 안경의 굴절력[원용 안경 굴절력(-)]이 (-)인 경우에는 원용 P.D로 조제 가공한 경우에 안정피로가 상대적으로 적었다. 근용 안경의 굴절력이 (+)인 경우에는 단정적으로 어떤 설계점 결정방식이 옳다고 확신 할 수는 없지만 데이터 결과에 의할 경우는 근용 P.D-A로 조제 가공한 경우에 상대적으로 더 적은 안정피로를 유발 하였다. 결론: 근용 안경의 굴절력[원용 안경 굴절력(-)]이 (-)인 경우에는 이전의 원용 안경을 착용하고 근거리를 주시한 경우에 근용 주시점에서의 기저내방(Base In)의 효과를 통해 폭주요구량은 감소된다. 따라서 근용 안경(-)은 근거리에서 폭주를 도와준다. 왜냐하면 기저내방의 효과가 원용 안경에 비해 상대적으로 작아졌기 때문이다. 근용 안경의 굴절력[원용 안경 굴절력(+)]이 (+)인 경우에는 상황에 따라 근용 P.D-B, 근용 P.D-A, 원용 P.D를 통해 설계점을 결정 할 수 있다.

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