• Title/Summary/Keyword: Extension Point

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LINEAR AUTOMORPHISMS OF SMOOTH HYPERSURFACES GIVING GALOIS POINTS

  • Hayashi, Taro
    • Bulletin of the Korean Mathematical Society
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    • v.58 no.3
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    • pp.617-635
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    • 2021
  • Let X be a smooth hypersurface X of degree d ≥ 4 in a projective space ℙn+1. We consider a projection of X from p ∈ ℙn+1 to a plane H ≅ ℙn. This projection induces an extension of function fields ℂ(X)/ℂ(ℙn). The point p is called a Galois point if the extension is Galois. In this paper, we will give necessary and sufficient conditions for X to have Galois points by using linear automorphisms.

A MISCELLANY OF SELECTION THEOREMS WITHOUT CONVEXITY

  • Kim, Hoonjoo
    • Honam Mathematical Journal
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    • v.35 no.4
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    • pp.757-764
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    • 2013
  • In this paper, we give sufficient conditions for a map with nonconvex values to have a continuous selection and the selection extension property in LC-metric spaces under the one-point extension property. And we apply it to weakly lower semicontinuous maps and generalize previous results. We also get a continuous selection theorem for almost lower semicontinuous maps with closed sub-admissible values in $\mathbb{R}$-trees.

Estimation of Stellate Ganglion Block Injection Point Using the Cricoid Cartilage as Landmark Through X-ray Review

  • Park, Jeong-Soo;Kim, Ki-Jun;Lee, Youn-Woo;Yoon, Duck-Mi;Yoon, Kyung-Bong;Han, Min-Young;Choi, Jong-Bum
    • The Korean Journal of Pain
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    • v.24 no.3
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    • pp.141-145
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    • 2011
  • Background: Stellate ganglion block is usually performed at the transverse process of C6, because the vertebral artery is located anterior to the transverse process of C7. The purpose of this study is to estimate the location of the transverse process of C6 using the cricoid cartilage in the performance of stellate ganglion block. Methods: We reviewed cervical lateral neutral-flexion-extension views of 48 patients who visited our pain clinic between January and June of 2010. We drew a horizontal line at the surface of the cricoid cartilage in the neutral and extension views of cervical lateral x-rays. We then measured the change in the shortest distance from this horizontal line to the lowest point of the transverse process of C6 between the neutral and extension views. Results: There was a statistically significant difference in the shortest distance from the horizontal line at the surface of the cricoid cartilage to the lowest point of transverse process of C6 between neutral position and neck extension position in both males and females, and between males and females in both neutral position and neck extension position. The cricoid cartilage level was 4.8 mm lower in males and 14.4 mm higher in females than the lowest point of transverse process of C6 in neck extension position. Conclusions: Practitioners should recognize that the cricoid cartilage has cephalad movement in neck extension. In this way, the cricoid cartilage can be still useful as a landmark for stellate ganglion block.

The Characteristics and meanings of the Agricultural Extension Work during the Period of Japanese Rule (일제시대 농촌지도사업의 성격과 의의)

  • Lee, Han-Ki
    • Journal of Agricultural Extension & Community Development
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    • v.4 no.1
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    • pp.231-243
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    • 1997
  • Objective of the study was to investigate characteristics and meanings of the agricultural extension work during the period of Japanese $rule(1906{\sim}1945)$ through historical review on the work. The agricultural extension work during the period of Japanese rule was categorized into six patterns such as agricultural extension work by (1) government agricultural administration system, (2) agricultural experiment/research institute, (3) public school, (4) through the movement of rural development(Nong-chon-Jinheung Undong), (5) pro-government private organization, and (6) pure private organization. In conclusion, the characteristics of the extension work were defined; 1) a tool and/or method for colonial rule, 2) non-democratic and top-down extension work by administration, 3) authoritative and coercive work initiated by governmental system, 4) nation wide work of cooperation with public and private organization, 5) extension work focused on production increasing food and industrial materials, and 6) extension work initiated by government system without participation of pure private organization. The meanings of the extension work were reviewed in two ways. Firstly, in macro point of view, the work has negative meaning that was utilized as a tool and/or method for Japanese colonial rule, since the extension work was implemented under the direction of agricultural policy and was also directly related to the policy of Japanese colonial government. Secondly, in micro point of view, the work has significant meaning either negative or positive such as 1) beginning of modernized extension work based on experiment and research, 2) introduction of forcible agricultural extension work, 3) inducement of distrust tendency to agricultural policy and agricultural extension work, 4) establishment of basis in hardware of agricultural extension work, 5) production of experience in software of agricultural extension work, and 6) improvement of recognition toward scientific farming and improvement of level in agricultural techniques.

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FIXED POINT THEORY FOR MULTIMAPS IN EXTENSION TYPE SPACES

  • P. Agarwal, Ravi ;O'ReganDonal;ParkSehie
    • Journal of the Korean Mathematical Society
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    • v.39 no.4
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    • pp.579-591
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    • 2002
  • New fixed Point results for the (equation omitted) selfmaps ale given. The analysis relies on a factorization idea. The notion of an essential map is also introduced for a wide class of maps. Finally, from a new fixed point theorem of ours, we deduce some equilibrium theorems.

The Effect on Chronic Low Back Pain Patient Through Lumbar Extension Muscular Strength Training (만성 요통환자의 요추부 신전강화에 의한 효과)

  • Choi, Young-Deog
    • Journal of Korean Physical Therapy Science
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    • v.2 no.4
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    • pp.779-783
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    • 1995
  • The number of the subjects of this study were all sixteen including 8 male and 8 female. They were chronic low back pain patients and treated at hospital out patient. The patients took lumbar extension strength training. The results of examination and analysis isometric lumbar extension muscular strength before and after the training are as follows; 1. TFT increased after lumbar extension muscular strength exercise than before the exercise. Inspire of difference of each angle. The reciprocal action didn't happen between training and angle. 2. NMT increased after lumbar extension muscular strength exercise than the before the exercise and the difference of each angle didn't happen. The reciprocal action also didn't happen between the training and angle. 3. Comparing presented standard point with individual point, 13persons' muscle strength of first step increased, on the other and 3 person's muscle strength a little increased in a same category. 4. The grade of low back pain decreased for all subjects. Concluding this study, lumbar extension muscular strength exercise through isokinetic device decreases the grade of low back pain and increase lumbar extension muscular strength. It is that equal exercise effect happen in full range of motion, for the exercise effect doesn't show the difference of each angle.

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Dynamic Fracture Behaviors of Concrete Three-Point Bend Specimens (콘크리트 삼점휨 시험편의 동적 파괴거동)

  • 연정흠
    • Journal of the Korea Concrete Institute
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    • v.14 no.5
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    • pp.689-697
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    • 2002
  • The dynamic loads and load-point displacements of concrete three-point bend (TPB) specimens had been measured. The average crack velocities measured with strain gages were 0.16 ㎜/sec ∼ 66 m/sec. The fracture energy for crack extension was determined from the difference of the kinetic energy for the load-point velocity and the strain energy without permanent deformation from the measure external work. For all crack velocities, there were micro-cracking for 23 ㎜ crack extension, stable cracking for 61 ㎜ crack extension at the maximum strain energy, and then unstable cracking. The unstable crack extension was arrested at 80 ㎜ crack extension except the tests of 66 m/sec crack velocity. The tests less than 13 ㎜/sec crack velocity and faster than 1.9 m/sec showed static and dynamic fracture behaviors, respectively. In spite of much difference of the load and load-point displacement relations for the crack velocities, the crack velocities of dynamic tests did not affect on fracture energy rate during the stable crack extension due to the reciprocal action of kinetic force, crack extension and strain energy. During stable crack extension, the maximum fracture resistances of the dynamic tests was 147% larger than that of the static tests.

The Effectiveness of Image and Attitude on Extension Brand Loyalty in the Foodservice Industry (확장된 외식브랜드이미지와 브랜드태도가 브랜드충성도에 미치는 영향에 관한 연구)

  • Kwon, Kum-Tack
    • Management & Information Systems Review
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    • v.28 no.2
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    • pp.1-19
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    • 2009
  • In the severely competitive market, brand extension strategy has become a key strategy to the companies that are trying to expand in the new market and to cut down the marketing cost. In conclusion, following results are deduced. First, hypothesis 1(H-1) refers to the relationship between image of extension brand and attitude of extension brand, and it shows path-coefficients value of 0.43, and t-value of 4.21 which supports the hypothesis statistically. Second, H-2 is the result of the analysis of relationship between attitude of extension brand and loyalty of extension brand and consequently the hypothesis is supported by the path-coefficients value of 0.29 and t-value of 3.08. The results of this study provided very useful information for both foodservice industry and academics. At first, in the theocratical point of view, this study suggests a new concept the foodservice brand extension. Consequently in marketing point of view, the results of this study recommend several strategies of foodservice brand extension using foodservice image, attitude and loyalty.

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Trends of the Agricultural Extension Research in Korea: A Ten Year Analysis (한국농촌지도의 연구동향)

  • Kim, Jin-Mo
    • Journal of Agricultural Extension & Community Development
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    • v.10 no.2
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    • pp.137-151
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    • 2003
  • The objectives of this study were to examine subject matter topics researched in agricultural extension over a ten year period, to analyze the research methods in detail, and to get some implications for the academic progress of agricultural extension. The data were collected from 197 journal articles published in the Korean Journal of Agricultural Extension from 1994 through 2003. Among them, research topics and methods were analyzed specifically on 123 articles categorized as agricultural extension. Data were summarized using frequencies and percentages. The conclusions acquired from this study were as follows. First of all, the research on agricultural extension had been increased since the 1970s, and it still has not decreased till now. Secondly, the research also has indicated the direction of development from a broad point of view by analyzing the reality at a general level. Therefore, much remains to be done for investigating the reality more scientifically and establishing the theories on the agricultural extension by explaining the reality with many theories from other studies. Thirdly, the study on the agricultural extension mostly has been led by the professors and the agricultural extension workers. Fourth, the study has been focused on macro sides such as extension philosophy, extension systems, extension structure, extension organization and so on. Fifth, the research also has been carried out on the agricultural extension workers and farmers. Finally, most of the research methods were library survey and survey research.

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