• Title/Summary/Keyword: Difference-In-Difference

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The Effects of Galgunhaejutang + Danjuhwan and Haejujigaltang on the Experimental Behaviors of Alcohol-Intoxicated Mice (갈근해주탕(葛根解酒湯) 합(合) 단주환(斷酒丸)과 해주지갈탕(解酒枳葛湯)이 실험적(實驗的) Alcoholism 생쥐의 행동(行動)에 미치는 영향(影響))

  • Bang Hea-Yeon;Whang Wei-Wan
    • Journal of Oriental Neuropsychiatry
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    • v.5 no.1
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    • pp.93-101
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    • 1994
  • This experiment was designed to investigate the effects of Galgunhaeiutang + Danjuhwan and Haejujigaltang on the experimental behaviors of alcohol-inticxicated mice. ICR mice were used as subjects for alcohol intoxication in this experiment and sample group received Herb Medicine. The foot-step and rearing score were measured in mice. Also Rota-Rod treadmill & number of successful trials swimming time in the T-maze were done. And the following results were observed; 1. The food-step score was decreased in Galgunhaejutang + Danjuhwan group at the 8th hour, the difference was statistically significant. But Haejujigaltang group showed no significant difference. 2. The number of rearing was decreased in Galgunhaejutang + Danjuhwan group at the 3rd and 8th hour, the difference was statistical significant, while Haejujigaltang group showed no significant differnce. 3. The motor incoordination measered by the Rota-Rod treadmill was decreased in Galgunhaejutang + Danjuhwan group at the 8th hour, but Haejujigaltang group showed no significant difference. 4. The number of successful trials in T-maze showed no significant difference in both groups. 5. The passing time in T-maze was increased in Galgunhaejutang +Danjuhwan group at the 8th hour, but Haejujigaltang group showed no significant difference.

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Change of Depression According to Physical Therapy in Stroke Patients (물리치료적용에 따른 일부 뇌졸중환자의 우울증 변화)

  • Yi, Seung-Ju;Jeong, Seong-Young
    • The Journal of Korean Physical Therapy
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    • v.13 no.1
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    • pp.33-40
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    • 2001
  • Objectives: This study was to identify the effect of physical therapy and related factors on depression in stroke patients. Methods: Questionnaires were completed by 46 stroke patients at physical therapy room in Busan Dongeui Medical Center from September 1999 to April 2001. The self·rating depression scale(SDS)was used to assess the differences for depression score in patients who had suffered a stroke. The design of this study was follow-up study between initial physical therapy and one month after initial. Results: A little decreased score(-0.17) was seen in patients treated with physical therapy in difference of depress between initial physical therapy and one month after initial, but there was no significant difference. In gender, male had -0.42 decreased score, female. on the contrary, had +0.09 increased score. Depress score for 50 years group was decreased(-2.08), but below 50 years and above 60 were increased in age (+1.25 and +0.27, respectively). There were no significant difference in weight, educational level, religion, side of paresis, and diabetes. Significant variables related to difference of depress in multiple regression analysis were weight(p=0.0082)and diagnosis(cerebral infarction, hemorrhage)(p=0.0473, R2=0.4241). Conclusions: This study was indicated that the more weight was a higher, the higher difference of depress score was. Difference of hemorrhage patients was smaller than that of infarction patients.

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THE EFFECT OF SOME CANAL PREPARATION TECHNIQUES ON THE SHAPE OF ROOT CANALS (수종의 근관형성 방법이 근관 형태에 미치는 영향)

  • Lee, Ji-Hyeon;Cho, Yong-Bum
    • Restorative Dentistry and Endodontics
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    • v.24 no.2
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    • pp.337-345
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    • 1999
  • The purpose of this study was to compare the shape of root canal after instrumentation with some engine driven NiTi files. Thirty narrow and curved canals(15-35 degree) of mesial canals of extracted human mandibular first molars were divided into three groups. Group 1: After radicular access with Gates Glidden drill, apical shaping using step back method with Flexo file Group 2: After radicular access with Gates Glidden drill, apical shaping with Profile .04 Group 3: Canal shaping with GT file and Profile .04. Using modified Bramante technique, the root was sectioned at 2 mm from apical foramen, height of curvature, 2 mm from canal orifice. Canal centering ratio, amount of transport, amount of dentin removed, shape of canal were measured and statistical analysis is done using SPSS Program V 7.5. The results were as follows: 1. Canal centering ratio of group 3 was the lowest at coronal part, but there was no statistical difference. Centering ratio of group 2 was the lowest at curve part, and there was statistical difference between group 1(P<0.05). Centering ratio of group 2 was the lowest at apical part, but there was no statistic difference. 2. Amount of transport of group 3 was the lowest at coronal part, but there was no statistical difference. Amount of transport of group 2 was the lowest at curve part, and there was statistical difference between group 1(P<0.05). Amount of transport of group 3 was the lowest at apical part, and there was statistical difference between group 1 and group 2, group 1 and group 3(P<0.05). 3. Amount of dentin removed of group 3 was the lowest at coronal part, bur there was no statistical difference. Amount of dentin removed of group 2 was the lowest at curve part, but there was no statistical difference. Amount of dentin removed or group 2 was the lowest at apical part, and there was statistical difference between group 1 and group 2, group 1 and group 3(P<0.05). 4. The shape of the canals after instrumentation varied among the groups. The majority of canals at coronal and curve part for group 1 were round in shape(7 in 10), those at apical part were oval(8 in 10). The majority of canals at coronal part for group 2 were round in shape(7 in 10) and there was no difference in the number of shape at other part. There was no difference in the number of shape at every part for group 3. As above results, NiTi rotary instrumentation showed a trend to remain more centered in the canal than SS file instrumentation. At using NiTi file, coronal shaping with Gates Glidden drill was not statistically different from shaping with GT file. But shaping with GT file showed tapered canals, so it may be said that shaping with GT file is a safe and valuable instrumentation method.

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ON THE CHARACTERIZATION OF DIFFERENCE QUOTIENT TRANSFORMATION

  • YANG MEEHYEA
    • Journal of applied mathematics & informatics
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    • v.20 no.1_2
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    • pp.535-540
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    • 2006
  • In this paper, characterizations of difference quotient transformation in the Krein space which is contained continuously and contractively in the krein space of square summable power series C (z) is obtained from the complementation theory.

The Effect of Government Intervention on the Market Failure in firm Training in Korea (기업교육훈련에 대한 정부 개입과 그 효과)

  • Kim, Ahn-Kook
    • Journal of Labour Economics
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    • v.32 no.2
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    • pp.125-150
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    • 2009
  • This article analysed the effect of government intervention on the market failure in firm training in Korean. I used the Employment Insurance DB and the KISLINE DB and joined two data by the firm identification number 2004-2006 year. I estimated the effect of intervention of government by propensity score matching and difference-in-difference method to avoid of participation selection and endogeneity problem. The result is that government intervention on the firm training have made positive effect but it is not significant statistically. We have to investigate the market failure in firm training and to reassess the level of optimal firm training in Korea. After the study, the government intervention on the firm trainig will have to be rearranged.

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STUDIES ON BOUNDARY VALUE PROBLEMS FOR BILATERAL DIFFERENCE SYSTEMS WITH ONE-DIMENSIONAL LAPLACIANS

  • YANG, XIAOHUI;LIU, YUJI
    • Korean Journal of Mathematics
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    • v.23 no.4
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    • pp.665-732
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    • 2015
  • Existence results for multiple positive solutions of two classes of boundary value problems for bilateral difference systems are established by using a fixed point theorem under convenient assumptions. It is the purpose of this paper to show that the approach to get positive solutions of boundary value problems of finite difference equations by using multi-fixed-point theorems can be extended to treat the bilateral difference systems with one-dimensional Laplacians. As an application, the sufficient conditions are established for finding multiple positive homoclinic solutions of a bilateral difference system. The methods used in this paper may be useful for numerical simulation. An example is presented to illustrate the main theorems. Further studies are proposed at the end of the paper.

Implementation of a Band-Pass Filter with Diffusion Neural Network and the Operation of Difference (확산신경망과 차분연산에 의한 대역통과 필터의 구현)

  • 이재성;허만택;이종혁;남기곤;김재창;박의열
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.32B no.7
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    • pp.1036-1044
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    • 1995
  • In this paper, a band-pass filter is implemented with the diffusion and difference processes by using the diffusion neural network model. The center frequency of this band-pass filter can be varied by iterations of the diffusion and difference operations, and the selectivity can be determined by iterations of the difference operation. We propose an efficient algorithm that can generate various band-pass filters using arbitrary diffusion and difference iterations. This algorithm needs only simple operations of diffusion and difference.

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THE UNIFORM CLT FOR MARTINGALE DIFFERENCE ARRAYS UNDER THE UNIFORMLY INTEGRABLE ENTROPY

  • Bae, Jong-Sig;Jun, Doo-Bae;Levental, Shlomo
    • Bulletin of the Korean Mathematical Society
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    • v.47 no.1
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    • pp.39-51
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    • 2010
  • In this paper we consider the uniform central limit theorem for a martingale-difference array of a function-indexed stochastic process under the uniformly integrable entropy condition. We prove a maximal inequality for martingale-difference arrays of process indexed by a class of measurable functions by a method as Ziegler [19] did for triangular arrays of row wise independent process. The main tools are the Freedman inequality for the martingale-difference and a sub-Gaussian inequality based on the restricted chaining. The results of present paper generalizes those of Ziegler [19] and other results of independent problems. The results also generalizes those of Bae and Choi [3] to martingale-difference array of a function-indexed stochastic process. Finally, an application to classes of functions changing with n is given.

Pointing position detection of capacitive touch screen panel using phase-difference method (위상차 방식을 사용한 용량방식 터치 스크린 패널의 접촉 위치 검출)

  • Jo, Yeong-Cheol;Jang, Rae-Hyeok;Gwon, Uk-Hyeon
    • Journal of Institute of Control, Robotics and Systems
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    • v.4 no.3
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    • pp.406-412
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    • 1998
  • This paper describes a contact position detection method of a capacitive touch screen panel. The proposed method is composed of a circuited compensating algorithm generating an output signal having phase difference to an input signal associated with contact position, converts both input and output signals into digital waveform (5V logic), and calculates the phase difference. Finally, position information with the phase difference is obtained by using a low-cost microprocessor, which is convenient to compensate non-linearity error. The proposed method, that computes phase difference directly, has advantages in feasibility and cost because it minimizes the use of analog devices; rather, it utilizes, cost effective digital circuit. Analytical results are also given.

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