• Title/Summary/Keyword: Orientation degrees

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Personality and Individual Media Dependency Goals (성격유형에 따른 미디어 의존관계에 관한 연구)

  • Shim, Jae-Woong
    • Cartoon and Animation Studies
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    • s.25
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    • pp.203-225
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    • 2011
  • This study investigated hypothesized relationships between three personality traits, as defined by PEN model (Psychoticism, Extraversion and Neuroticism), and individual media dependency. The basic idea of the study was that individuals' goals are related to active media use, and the goals will be different based on differences in individuals' personality types. In addition, this study attempted to find whether there are gender difference in constructing media dependency relations with the media. The study was conducted online and the total number of participants was 337 (158 male and 179 female). Correlation analyses indicated no relationship between the extraversion and any of the IMD media use categories. Lower levels of psychoticism were related to a greater likelihood of utilizing the media in an effort to obtain self understanding and having fun more than higher levels of psychoticism. Individuals with higher levels of neuroticism were significantly more likely to depend on the media for achieving self understanding than those with lower levels of neuroticism. When the variable of participant gender was controlled for, there were different patterns of the relationships between personality types and IMD goals. This study showed that to varying degrees certain personality types are related to the goals individuals seek to fulfill with the media use. The implications of the study were discussed.

A Study of Mineral Quantification on Clay-Rich Rocks (점토질 암석의 광물정량 분석법 연구)

  • Byeong-Kook, Son;Gi-O, An
    • Korean Journal of Mineralogy and Petrology
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    • v.35 no.4
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    • pp.431-445
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    • 2022
  • A quantitative phase analysis method of X-ray powder diffraction was studied to determine the mineral content of clay-rich rocks practically as well as effectively. For quantitative X-ray powder diffraction analysis of the clay-rich rocks, it is necessary to prepare whole-rock powder samples with a random orientation by side mounting method. In addition, for the identification of the clay minerals in the rock, it is required to prepare an oriented mount specimen with a clay particle size of 2 ㎛ or less, ethylene glycol treatment, and heat treatment. RIR (reference intensity ratio) and Rietveld method were used for the quantitative analysis of the clay-rich rocks. It was possible to obtain the total clay and the non-clay minerals contents from the whole-rock X-ray diffraction profiles using the RIR values. In addition, it was possible to calculate the relative content of each clay mineral from the oriented X-ray diffraction profiles of the clay particle size and assign it to the total clay. In the Rietveld method of whole-rock X-ray diffraction, effective quantitative values were obtained from the Rietveld diffraction patterns excluded the region of less than 10 degrees (2θ). Similar quantitative values were shown in not only the RIR but the Rietveld methods. Therefore, the analysis results indicate a possibility of a routine quantitative analysis of clay-rich rocks in the laboratory. However, quantitative analysis of clay minerals is still a challenge because there are numerous varieties of clay minerals with different chemical and structural characteristics.

Improvement of Double Density Discrete Wavelet Transformation with Enhancement of Directional Selectivity (방향의 선택성 향상을 통한 이중 밀도 이산 웨이브렛 변환의 성능 개선)

  • Lim, Joong-Hee;Shin, Jong-Hong;Jee, Inn-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.2
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    • pp.221-232
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    • 2012
  • The double-density discrete wavelet transform(DWT) is an improvement upon the critically sampled DWT with important additional properties. It employs one scaling function and two distinct wavelets, which are designed to be offset from one another by one half. And it is overcomplete by a factor of two. Also, this transformation is nearly shift-invariant. But there is room for improvement because not all of the wavelets are directional. That is, although the double-density DWT utilizes more wavelets, some lack a dominant spatial orientation, which prevents them from being able to isolate those directions. Proposed method is a DWT that combines the double-density DWT and quincunx sampling, each of which has its own characteristics and advantages. Especially, the quincunx sampling treats the different directions more homogeneously. As a result, since proposed method can generate sub-images of multiple degrees rotated versions, this method provides an improved performance in image processing fields.

The Effect of Human Factors on the Use of Mobile Phone (이용자의 인적 속성이 이동전화 이용에 미치는 영향)

  • Bae, Jin-Han
    • Korean journal of communication and information
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    • v.19
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    • pp.155-184
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    • 2002
  • Mobile phone users have diversified human factors: their channel orientations are different, and the degrees of unwillingness to communicate vary. We examined the effect of human factors on the use of mobile phone, such as the diversity of mobile phone use, the appropriateness of mobile phone, and the aversion to mobile phone as well as the interpersonal communication network through mobile phone. For our sample we surveyed college students and their family members who are older than 400. We found that the more social presence a mobile phone user gets through the mobile phone, and the more familiar to the mobile phone he/she is, (1) the more diversified is the use of mobile phone service, (2) the higher is the level of acceptance of the mobile phone as an interpersonal communication media, and (3) the lower is the level of aversion to the mobile phone. In contrast, those who have some level of aversion to the face-to-face communication, seem to form very limited interpersonal communication network through mobile phone. Their use of mobile phone is also very limited.

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Dispersion Stability of Pigments in Aqueous Solution of Anionic Oligo Type Surfactants(Parts 1)-Dispersion of Phthalocyanine or Carbon Black- (올리고머형 음이온성 계면활성제 수용액에서 안료의 분산성(제1보) - Phthalocyanine이나 Carbon Black의 분산 -)

  • Lee, H.W.;Yun, Y.K.;Park, H.Ch.;Nam, K.D.
    • Applied Chemistry for Engineering
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    • v.9 no.1
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    • pp.1-5
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    • 1998
  • The dispersing behaviors of oligomer-type anionic surfactants, cooligomers of diethyl maleate(CmD-Na) or maleic anhydride (CmM-Na) and $C_4{\sim}C_{16}$ alkyl vinylether, which have a different alkyl chain length of the hydrophobic group or degree of polymerization, were studied on the aqueous suspension of ${\alpha}-$ and ${\beta}-$ copper phthalocyanine and carbon black particles. In case of the side alkyl chain length of $C_4{\sim}C_{10}$ of CmD-Na, the dispersing actions were good in the concentration range of 0.01 to 0.1%. Especially, side alkyl groups played an important role in the orientation adsorption on the surface of pigment particles, and oligomers having smaller degrees of polymerization were more effective in the dispersing action, but did not affect the dispersability of carbon black.

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Undamped Forced Vibration Response of Curved Composite Panels using Enhanced Assumed Strain Finite Element-Direct Integration Method (추가변형률 유한요소-직접적분법을 이용한 복합적층 곡선패널의 비감쇠 강제진동응답)

  • Park, Won-Tae;Chun, Kyoung-Sik;Son, Byung-Jik
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.8 no.2
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    • pp.247-258
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    • 2004
  • The composite shell element is developed for the solution of undamped forced vibration problem of composite curved panels. The finite element used in the current study is an 4-node enhanced assumed shell element with six degrees of freedom per node. The composite shell element is free of both shear and membrane locking phenomenon by using the enhanced assumed strain(EAS) method. A modification to the first-order shear deformation shell theory is proposed, which results in parabolic thorough-thickness distribution of the transverse shear strains and stresses. It eliminates the need for shear correction factors in the first order theory. Newmark's direct integration technique is used for carrying out the integration of the equation motion, to obtain the repones history. Parametric studies of curved composite panels are carried out for forced vibration analysis by geometrical shapes and by laminated composite; such as fiber orientation, stacking sequence.

Effect of orientation of fracture zone on tunnel behavior during construction using model test (실내 모형실험을 통한 시공 중 파쇄대의 공간적 분포가 터널거동에 미치는 영향)

  • Cho, Yun-Gyu;Shin, Seung-Min;Chung, Eun-Mok;Choi, Jung-Hyuk;Yoo, Chung-Sik
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.17 no.3
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    • pp.189-204
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    • 2015
  • This paper presents the results of reduced scale model tests on the effect of fault zone characteristics on the tunnel deformation behavior. A series of model tests were carried out on deep tunnels considering different fault zone orientations and offset distance. The tunnelling process was simulated in the model tests using compressed air technique. During the tests, the tunnel and ground deformation were mainly monitored while reducing the pressure inside the tunnel and the relationship between the pressure level and the tunnel deformation were established. The results indicate that for a given offset distance the tunnel behavior is influenced the most when the fault zone dips vertically while smallest influence occurs when the fault zone dips 45 degrees.

Study on Developing the Equipment of the Time Division System for Rehabilitation in People with Homonymous Hemianopia (동측성 반맹시 환자의 재활치료용 시분할 장치 개발에 관한 연구)

  • Seo, Jae-Myoung;Park, Gune-Ho;Heo, Min-Young;Jung, Ju-Hyun
    • Journal of Korean Ophthalmic Optics Society
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    • v.19 no.3
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    • pp.407-412
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    • 2014
  • Purpose: It is investigated whether the time division system can extend the field without diplopia for people with homonymous hemianopia. Methods: The time division system was manufactured by a modified mini fan and a black cardboard. In order to verify the effectiveness of the equipment, subjects with and without the equipment took part in the experiment to bisect the space and to recognize letters. Results: Subjects with and without the equipment showed +8.91 and +18.14 degrees in the experiment to bisect the space. In the experiment reading the letters and numbers with the equipment, there were 9 percentage point increase in $4{\times}4$ charts and 15 percentage point increase in $6{\times}6$ charts. It turned out that there was a remarkable improvement for the worst group for reading the charts. Conclusions: The time division system is effective in the mobility and orientation for people with homonymous hemianopia.

FINITE ELEMENT ANALYSIS OF THE EFFECT OF CANTILEVER AND IMPLANT ORIENTATION ON STRESS DISTRIBUTION IN A MANDIBULAR IMPLANT-SUPPORTED BAR OVERDENTURE (하악피개의치에서 임플랜트의 식립각도에 따른 칸틸레버 길이의 감소효과가 응력분포 양상에 미치는 영향 -삼차원 유한요소법을 이용한 분석-)

  • Park, Jun-Soo;Lee, Sung-Bok;Kwon, Kung-Rock;Woo, Yi-Hyung
    • The Journal of Korean Academy of Prosthodontics
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    • v.45 no.4
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    • pp.444-456
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    • 2007
  • Statement of problem: Implant inclination and cantilever loading increse loads distributed to implants, potentially causing biomechanical complications. Controversy exists regarding the effect of the intentionally distal-inclined implant for the reduction of the cantilever length. Purpose: This study investigated the stress distribution at the bone/implant interface and prostheses with 3D finite element stress analysis by using four different cantilever lengths and implant inclinations in a mandibular implant-supported bar overdenture. Material and methods: Four 3-D finite element models were created in which 4 implants were placed in the interforaminal area and had four different cantilver lengths(10, 6.9, 4 and 1.5mm) and distal implant inclinations$(0^{\circ},\;15^{\circ},\;30^{\circ}\;and\;45^{\circ})$ respectively. Vortical forces of 120N and oblique forces of 45N were applied to the molar area. Stress distribution in the bone around the implant was analysed under different distal implant inclinations. Results: Analysis of the von Mises stresses for the bone/implant interfaces and prostheses revealed that the maximum stresses occurred at the most distal bone/implant interface and the joint of bar and abutment, located on the loaded side and significantly incresed with the implant inclinations, especially over $45^{\circ}$. Conclusion: Within the limitations of this study, it was suggested that too much distal inclination over 45 degrees can put the implant at risk of overload and within the dimension of the constant sum of a anterior-posterior spread and cantilever length, a distal implant inclination compared to cantilever length had the much larger effect on the stress distribution at the bone/implant interface.

Development of An User-Friendly Integrated Program and Teaching System for Automatic Polishing Robot System (자동 연마 시스템의 사용자 지향형 통합 프로그램 및 자동 교시 시스템 개발)

  • Go, Seok-Jo;Lee, Min-Cheol;Lee, Man-Hyeong;An, Jung-Hwan;Jeon, Cha-Su;Lee, Don-Jin
    • Journal of Institute of Control, Robotics and Systems
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    • v.7 no.4
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    • pp.334-343
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    • 2001
  • Polishing a die that has free-form surfaces is a time-consuming and tedious job, and requires a considerable amount of high-precision skill. Some workers tend to gradually avoid the polishing work because of the poor environment caused by dust and noise. In order to reduce the polishing time and cope with the shortage of skilled workers, a user-friendly automatic polishing system was developed in this research. The polishing system with five degrees of freedom is able to keep the polishing tool normal to the die surface. The polishing system is controlled by a PC-NC controller. To easily operate the developed polishing robot system, this study developed an integrated program in the Windows environment. This program consists of four modules: the polishing module, the graphic simulator, the polishing data generation module, and the teaching module. Also, the automatic teaching system was developed to easily obtain teaching data and it consists of a three dimensional joystick and a proximity sensor. The joystick is used to simultaneously drive the polishing system to an arbitrary orientation and the proximity sensor is used to obtain teaching points precisely. Also, to evaluate the stability of the driving program and the teaching system, polishing experiments of a die of saddle shape were carried out.

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