• Title/Summary/Keyword: 머리

Search Result 1,864, Processing Time 0.028 seconds

The Biting Behavior of Tuna on Baits (다랑어의 미끼 섭취 습성)

  • PARK Sing Won
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.15 no.4
    • /
    • pp.317-322
    • /
    • 1982
  • The biting behaviors of tuna were studied based on the remains of saury (Cololabis saira), which was used as bait, in the stomach contents of tuna. The saury remains were classified into four segmental groups (A-segment: Whole fish; B-segment: anterior partion with head: C-segment: middlepart without both head and tail: D-segment : posterior part without head). The tuna stomachs were independently named and grouped into three subsamples according to bait segments remaining in the stomach. The subsamples have the extra number of the stomach-naming segments and the distributions of the bait tegments are biased from tile random distribution. The distribution of the bait segments except the extra segments are hypothetically assumed to be random, and was subjected to the chi-square test of significance. The inferred conclusions are as follows:1. Most of the tuna having the B-segment had previously taken the C and/or D-segment. 2. The catchability of the yellowfin tuna having the B-segment seems higher than that of the fish having the A-segment in the stomach. 3. Tuna which had two or more bait heads should have taken the extra bait heads without being hooked detaching the head from the hook by biting the Posterior porting of tile bait.

  • PDF

IIR Filter Design of HRTF for Real-Time Implementation of 3D Sound by Synthetic Stereo Method (합성 스테레오 방식 3차원 입체음향의 실시간 구현을 위한 머리전달 함수의 IIR 필터 설계)

  • Park Jang-Sik;Kim Hyun-Tae
    • The Journal of the Korea Contents Association
    • /
    • v.5 no.6
    • /
    • pp.74-86
    • /
    • 2005
  • In this paper, we proposed an algorithm for the approximation of high order FIR filters by low order IIR filters to efficient implementing two channel 3-D surround sound systems using Head-related transfer functions(HRTFs). The algorithm is based on a concept of the balanced model reduction. The binaural sounds using the approximated HRTFs are reproduced by headphone, and serves as a cue of sound image localization. HRTFs of dummy-head are approximated from 512-order FIR filters by 32-order IIR filters and compare with each other. .Experiment of sound image are carried out for 10 participants. We perform the experiment based on computer simulation and hardware experiment with TMS320C32. The results of the experiments show that the localization using the approximated HRTFs is the same accuracy as the case of FIR filters that simulate the HRTFs.

  • PDF

Simply Separation of Head and Face Region and Extraction of Facial Features for Image Security (영상보안을 위한 머리와 얼굴의 간단한 영역 분리 및 얼굴 특징 추출)

  • Jeon, Young-Cheol;Lee, Keon-Ik;Kim, Kang
    • Journal of the Korea Society of Computer and Information
    • /
    • v.13 no.5
    • /
    • pp.125-133
    • /
    • 2008
  • As society develops, the importance of safety for individuals and facilities in public places is getting higher. Not only the areas such as the existing parking lot, bank and factory which require security or crime prevention but also individual houses as well as general institutions have the trend to increase investment in guard and security. This study suggests face feature extract and the method to simply divide face region and head region that are import for face recognition by using color transform. First of all, it is to divide face region by using color transform of Y image of YIQ image and head image after dividing head region with K image among CMYK image about input image. Then, it is to extract features of face by using labeling after Log calculation to head image. The clearly divided head and face region can easily classify the shape of head and face and simply find features. When the algorism of the suggested method is utilized, it is expected that security related facilities that require importance can use it effectively to guard or recognize people.

  • PDF

Development of Expansive Contents for Jeju-do Geopark - Focus on Sanbangsan and Yongmuri Beach- (제주도 지오파크의 발전적 콘텐츠 개발 - 산방산·용머리 해안을 중심으로 -)

  • Kwon, Dong-Hi
    • Journal of The Geomorphological Association of Korea
    • /
    • v.18 no.3
    • /
    • pp.1-10
    • /
    • 2011
  • Sanbangsan and Yongmuri Beach as geosites are very wide areas, and tourists have accessed them via various courses; hence the need to double the number of geosite signs and disperse them at each point. The signs should read "Sanbangsan lava dome," "Yongmuri tuff ring," and "Relationship between the Sanbangsan lava dome and Yongmuri tuff ring." The contents of the sign should be systemic, simple, and clear because tourists have to read it in a short time. The viewpoint of the research area can be largely divided into Sanbangsan View, Yongmuri Beach View, Sanbangsan, and Yongmuri Beach View. Three of each viewpoint (total of 9 viewpoints) can be placed. In the geosite of Sanbangsan and Yongmuri Beach are 5 sub-theme views including the boundary sheet of Sanbangsan and Yongmuri tuff ring, xenolith basalt, marine pothole, tafoni, and crossed sedimentary layer. These sub-theme views are important in understating not only the geosite but the overall geopark as well, so they should be developed and utilized aggressively.

지루 피부염

  • No, Byeong-In
    • 건강소식
    • /
    • v.17 no.2 s.171
    • /
    • pp.28-30
    • /
    • 1993
  • 머리를 감은지 얼마 지나지 않아 하얀 비늘같은 것이 떨어지거나, 간혹 이 부위의 머리가 듬성듬성 빠지는 경우가 있는데, 이것이 지루성 피부염이다.

  • PDF

Anchorage Strength of Headed Bars in Steel Fiber-Reinforced UHPC of 120 and 180 MPa (120, 180 MPa 강섬유 보강 초고성능 콘크리트에 정착된 확대머리철근의 정착강도)

  • Sim, Hye-Jung;Chun, Sung-Chul;Choi, Sokhwan
    • Journal of the Korea Concrete Institute
    • /
    • v.28 no.3
    • /
    • pp.365-373
    • /
    • 2016
  • Ultra-High-Performance Steel Fiber-Reinforced Concrete (SUPER Concrete) exhibits improved compressive and tensile strengths far superior to those of conventional concrete. These characteristics can significantly reduce the cross sectional area of the member and the anchorage strength of a headed bar is expected to be improved. In this study, the anchorage strengths of headed bars with $4d_b$ or $6d_b$ embedment length were evaluated by simulated exterior beam-column joint tests where the headed bars were used as beam bars and the joints were cast of 120 or 180 MPa SUPER Concrete. In all specimens, the actual yield strengths of the headed bars over 600 MPa were developed. Some headed bars were fractured due to the high anchorage capacity in SUPER Concrete. Therefore, the headed bar with only $4d_b$ embedment length in 120 MPa SUPER Concrete can develop a yield strength of 600 MPa which is the highest design yield strength permitted by the KCI design code. The previous model derived from tests with normal concrete and the current design code underestimate the anchorage capacity of the headed bar anchored in SUPER Concrete. Because the previous model and the current design code do not consider the effects of the high tensile strength of SUPER Concrete. From a regression analysis assuming that the anchorage strength is proportional to $(f_{ck})^{\alpha}$, the model for predicting anchorage strength of headed bars in SUPER Concrete is developed. The average and coefficient of variation of the test-to-prediction values are 1.01 and 5%, respectively.

Quality Characteristics of Replacing Pork Hind Leg with Pork Head Meat for Hamburger Patties (돈육 후지를 머리고기로 대체한 햄버거 패티의 품질 특성)

  • Choi, Yun-Sang;Jeon, Ki-Hong;Ku, Su-Kyung;Sung, Jung-Min;Choi, Hyun-Wook;Seo, Dong-Ho;Kim, Cheon-Jei;Kim, Young-Boong
    • Korean journal of food and cookery science
    • /
    • v.32 no.1
    • /
    • pp.58-64
    • /
    • 2016
  • The effects of reducing pork hind legs concentrations from 80% to 60% and replacing the pork head meat with up to 20% pork head meat were investigated based on chemical composition, cooking characteristics, physicochemical properties, shear force, and sensory characteristics of hamburger patties. The increasing the pork head levels from 0% to 20% increased the protein content, pH, reduction in diameter, reduction in thickness, and shear force of hamburger patties, but decreased the moisture content, lightness, redness, yellowness, cooking yield, and water holding capacity of hamburger patties. The fat and ash contents of the hamburger patties with different amounts of pork hind legs and pork head showed no significantly different sensory characteristics from the control and all the treatments (p>0.05). The hamburger patties with increasing pork head levels had lower color, flavor, juiciness, and overall acceptability scores, but the overall acceptability of control showed similar trends to T1 and T2. Therefore, replacing pork hind legs with pork head meat in the formulation was successfully similar to control hamburger patties, with best results obtainedon replacing up to 10% pork head meat.

The Function and Quantitative Somatosensory Correlation Analysis of Temporomendibular Joint according to Forward Head Posture (전방머리자세에 변화에 따른 턱관절 기능 및 정량적 체성감각의 상관분석)

  • Lee, Eun Sang
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.20 no.12
    • /
    • pp.645-651
    • /
    • 2019
  • This study examined the correlation between the forward head posture (FHP), temporomandibular joint disorder (TMD), and temporomandibular joint quantitative somatosensory sensation. This study examined the correlation between the temporomandibular joint function and somatosensory sensation according to the change in FHP after the intervention on the head posture in 62 subjects (22.15 ± 2.56 years) Biofeedback training was administered to the FHP, which was performed 12 times for a total of four weeks. To assess the FHP, the craneovertebral angle (CVA) was examined. The temporomandibular joint (TMJ) function was measured by the Therapeutic Range of Motion Scale and the left and right lateral deviation, and the sensation of vibration threshold was measured to confirm the change in somatic sensation. Multiple regression analysis was performed to confirm the influence of each variable and Pearson's correlation analysis was performed to assess the correlation. Changes in the temporal joint function (p<.001) and somatic sensation (p<.001) were correlated significantly with the changes in CVA. These results show that there is a significant correlation between the frontal head position, TMJ function, and somatosensory sensation. These results provide a new paradigm for the treatment of jaw joints for patients suffering from TMD and provide a basis for the future treatment of the temporomandibular joint.

Anchorage Strength of High Strength Headed Bar Embedded Vertically on SFRC Members (SFRC 부재에 수직 배근된 고강도 확대머리철근의 정착강도)

  • Lee, Chang-Yong;Kim, Seung-Hun
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.24 no.1
    • /
    • pp.148-156
    • /
    • 2020
  • The paper is a summary of the results of the basic pullout test which is conducted to evaluate the anchorage capacity of high strength headed bars that is mechanical anchored vertically on steel fiber reinforced concrete members. The main experimental parameters are volume fraction of steel fiber, concrete strength, anchorage length, yield strength of headed bars, and shear reinforcement bar. Both sides of covering depth of the specimen are planned to double the diameter of the headed bars. The hinged point is placed at the position of each 1.5𝑙dt and 0.7𝑙dt around the headed bars, and the headed bars are drawn directly. As a result of pullout test experiment, concrete fracture and steel tensile rupture appear by experimental parameters. The compressive strength of concrete is 2.7~5.4% higher than that of steel fiber with the same parameters, while the pullout strength is 20.9~63.1% higher than that of steel fiber without the same parameters, which is evaluated to contribute greatly to the improvement of the anchorage capacity. The reinforcements of shear reinforcements parallel to the headed bars increased 1.7~7.7% pullout strength for steel fiber reinforced concrete, but the effect on the improvement of the anchorage capacity was not significant considering the increase in concrete strength. As with the details of this experiment, it is believed that the design formula for the anchorage length of KCI2017and KCI2012 are suitable for the mechanical development design of SD600 head bar that is perpendicular to the steel fiber reinforced concrete members.

A Convergence Study on Changes in the Muscle Activity around the Neck of the Operator according to the Patient's Head Angle at the Direct Visual Inspection of the Maxillary Right-side Molar Palatal Surface (상악 우측 대구치 구개면의 직접 시진 시 환자 머리 각도에 따른 술자의 목 주변 근육활성도 변화의 융합적 연구)

  • Lee, Sook-Jeong
    • Journal of the Korea Convergence Society
    • /
    • v.9 no.11
    • /
    • pp.209-216
    • /
    • 2018
  • This study aimed to investigate the association of the muscle activity around the neck of the operator(dental hygienists') according to the change in the patient's neck angle during a direct visual inspection on the maxillary right-side molar palatal surface. The operators were $4^{th}$ year dental hygiene students, who are future dentalhy gienists, having accurate understanding on and awareness of the location of the operation site, hand fixation, and how to use the tools. Data on the change in the muscle activity around the neck were collected by using surface electromyography and neck goniometer. SPSS statistics 20 was used for statistical analyses including Shapiro-wilk test and one-way ANOVA. As a result, the activities of the operator upper trapezius, cervical erector spinae, and levator scapulae muscles significantly decreased when the patient's head was angled compared to when it was not. For the angle of the operator head, the head bend significantly decreased when the patient's head was angled than when it was not. Based on the study results, it is expected that angling the patient's head when treating his or her teeth will decrease the excessive muscle activity around the neck of the operator, and will reduce muscle fatigue. Therefore, angling the head of the patient while treating his or her teeth is recommended. This suggests that muscle pain caused by repetitive actions in the wrong posture can be reduced.