• Animal cells and systems
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• 제4권1호
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• pp.63-70
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• 2000

The distribution of receptor subtypes for endothelin (ET) in the kidney of the freshwater turtle, Amyda japonica, was examined by quantitative in vitro receptor autoradiography using iodinatd mammalian type ET-1 ($^125$/I-ET-1)as a radiolabeled ligand. Specific $^125$/I-ET-1 bindings were localized to renal tubules, renal arteries and ureter with binding densities of 111.21 $\pm$ 19.14, 182.13$\pm$10.57 and 219.46$\pm$12.83 amol/$mm^2$. respectively. Binding dissociation constants in renal tubules, renal arteries and ureter were 1.05 $\pm$ 0.63, 2.03 $\pm$0.56 and 1.70$\pm$0.47nM, respectively. Receptor subtypes for ET in the kidney were characterized by competition with BQ 123 and BQ 788 as specific antagonists for ET receptors, type A (ET$_A$ ), and type B (ET$_B$) subtypes, respectively. Specific $^125$/I-ET-1 bindings in renal arteries and ureter were potently inhibited by BQ 123 in a dose-dependent manner, whereas BQ 788 was not in competing for specific $^125$/I-ET-1 bindings in this structure. However, specific $^125$/I-ET-1 bindings in renal tubules were inhibited more potently by BQ 788. Therefore, these results indicate that specific ET receptors are localized in renal tubules, renal arteries and the ureter of the freshwater turtle. Results also suggest that the predominant ET receptor subtypes are like the ETA receptor in renal arteries and ureter, and like the ET/$_A$ receptor in the renal tubule.

• International Journal of Advanced Culture Technology
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• 제7권4호
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• pp.313-320
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• 2019

Nowadays, as the availability of tiny, low-cost microcomputer increases at a high level, mobile robots are experiencing remarkable enhancements in hardware design, software performance, and connectivity advancements. In order to control Turtlebot 2, several algorithms have been developed using the Robot Operating System(ROS). However, ROS requires to be run on a high-cost computer which increases the hardware cost and the power consumption to the robot. Therefore, design an algorithm based on low-cost hardware is the most innovative way to reduce the unnecessary costs of the hardware, to increase the performance, and to decrease the power consumed by the computer on the robot. In this paper, we present a path-finding algorithm for TurtleBot 2 based on low-cost hardware. We implemented the algorithm using Raspberry pi, Windows 10 IoT core, and RPLIDAR A2. Firstly, we used Raspberry pi as the alternative to the computer employed to handle ROS and to control the robot. Raspberry pi has the advantages of reducing the hardware cost and the energy consumed by the computer on the robot. Secondly, using RPLIDAR A2 and Windows 10 IoT core which is running on Raspberry pi, we implemented the path-finding algorithm which allows TurtleBot 2 to navigate from the starting point to the destination using the map of the area. In addition, we used C# and Universal Windows Platform to implement the proposed algorithm.

• 문화기술의 융합
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• 제5권4호
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• pp.227-235
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• 2019

본 연구의 목적은 거북목을 가진 사람에게 메켄지 폄운동과 어깨안정화운동이 앞쪽머리자세에 미치는 영향에 대해 알아보는 것이다. 연구대상자는 30명의 거북목을 가진 평범하고 건강한 사람들로 이루어져 있다. 대상자는 어깨안정화운동과 메켄지 폄운동으로 나누어(인원=30, 남자 15명, 여자 15명) 무작위로 나누어 6주 동안 실시되었다. 본 연구는 마름근, 아래등세모근의 운동프로그램과 깊은목굽힘근, 위등세모근, 어깨올림근의 신장프로그램을 통한 목뼈의 머리척추각(Cervical Vertebra Angle) 값과 각 근육별 근전도의 차이를 알아보았다. 앞쪽머리자세와 경우에는 목과 등근육의 활성도가 감소하고 피로도는 증가함을 보였다. 이러한 결과는 목과 머리의 불안정한 상태를 안정시키기 위해서는 위등세모근, 깊은목굽힘근, 어깨올림근의 신장과 마름근, 아래등세모근의 운동을 통해 거북목의 개선에 긍정적인 변화를 줄 것으로 보인다. 이러한 근육들의 불균형한 수축과 과도한 긴장으로 근육의 경직과 피로가 누적되며 이러한 상태가 계속 유지되게 되면 만성화상태가 되어 근육의 불균형으로 인해 통증을 유발할 수 있으며, 피로의 누적으로 인하여 자극에 대한 반응과 근력을 약화시켜서 목 디스크가 발생할 확률이 높아질 것으로 사료된다.

• 패션비즈니스
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• 제25권3호
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• pp.144-158
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• 2021

The purpose of this study is to develop a bodice block suitable for women in their 20s with turtle neck syndrome. The problem of turtle neck syndrome body type was derived through the evaluation of bodice blocks. First, the length of the front bodice was longer and the length of the back bodice was shorter. Second, the front neck point, back neck point, and the shoulder line were not in place. Third, the side neck was pushed up. Fourth, the length of armhole was long and it floated. Fifth, the front hem was attached to the body and the back hem was away from the body. A finally developed pattern was designed by developing four test patterns to solve the problem that appeared in a selected bodice pattern, and a t-test was conducted to determine the difference in the appearance evaluation by virtual clothing between the two patterns, bodice block and the development pattern. According to the result, the fit was not good from the side body because the position of the side neck point was not in a place due to the characteristics of the body shape of turtle neck syndrome, but the problems of the anterior neck position, the position of the back neck point, the shoulder line position, and the armhole shape were improved in the developed pattern.

• 한국습지학회지
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• 제23권2호
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• pp.116-121
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• 2021

이 연구는 현재까지 국내 야생에서 확인되지 않았던 외래종 견목거북과(Podocnemididae) 아마존노란점거북(Yellow-spotted Amazon River Turtle, Podocnemis unifilis)을 처음으로 관찰한 사실을 학술적으로 보고하고자 한다. 2020년 7월 24일 제주특별자치도 제주시 조천읍 와흘리 33°30'20.08"N 126°38'0.23"E 지점에서 아마존노란점거북 2개체가 바위에서 일광욕하고 있는 것이 관찰되었다. 1개체는 머리에 노란색 반점이 있었고, 다른 1개체는 흑화되어 검은색을 띠었다. 관찰된 장소는 도로와 인접해 있고, 사람들의 출입이 잦은 곳으로, 애완용으로 사육되던 개체가 연못으로 방사된 것으로 추측된다. 최근 호수, 저수지 등 국내 야생에서 확인되는 외래거북이 증가하고 있으며, 외래거북 유입으로 인한 수생태계의 피해가 예상되는 만큼, 외래생물에 대한 시민과학 프로젝트와 환경교육을 통한 대중들의 인식 개선이 필요하다. 향후 발견된 개체에 대하여 지속적인 모니터링을 통한 야생 적응 여부, 번식과 관련된 추가 연구가 수행되어야 할 것이다.

• 한국환경복원기술학회지
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• 제25권5호
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• pp.29-41
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• 2022

Alien species cause problems in various ecosystems, reduce biodiversity, and destroy ecosystems. Due to these problems, the problem of a management plan is increasing, and it is difficult to accurately identify each individual and calculate the number of individuals, especially when researching alien turtle species such as GPS and PIT based on capture. this study intends to conduct an individual recognition study using a UAV. Recently, UAVs can take various sensor-based photos and easily obtain high-definition image data at low altitudes. Therefore, based on previous studies, this study investigated five variables to be considered in UAV flights and produced a test paper using them. OCR was used to monitor the displayed turtles using the manufactured test paper, and this confirmed the recognition rate. As a result, the use of yellow numbers showed the highest recognition rate. In addition, the minimum threat distance was confirmed to be 3 to 6m, and turtles with a shell size of 6 to 8cm were also identified during the flight. Therefore, we tried to propose an object recognition methodology for turtle display text using OCR, and it is expected to be used as a new turtle monitoring technique.

• 한국수산과학회지
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• 제55권6호
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• pp.917-926
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• 2022

The green turtle Chelonia mydas has been designated as an endangered species globally due to its reduced population. Although C. mydas is not known to reproduce on the shores of the Korean peninsula, it has been listed as a protected marine species in South Korea. This study describes the first successful captive breeding of C. mydas in a commercial aquarium in South Korea and provides information on the early growth patterns of C. mydas hatched and reared in indoor facilities. C. mydas YS-B003 laid a total of 594 eggs in ten nesting events in the period December 2016-June 2017. Of these, 115 fertilized eggs from six events hatched successfully. The size of the newly hatched turtles differed significantly among nesting events. The hatchlings from the 8^th and 9^th nesting events were relatively smaller than those from the 3^rd and 5^th events. The rate of growth initially varied across the different events, but from the 1,000^th day, the inter-group variation disappeared. The present study provides useful information for future captive breeding of sea turtles in indoor facilities, which would contribute to the protection of these endangered sea turtle species.

• 패션비즈니스
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• 제26권3호
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• pp.116-137
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• 2022

The purpose of this study was to develop jacket patterns that could fit well for women in their 20s with turtle neck syndrome body shape and to present a pattern drafting method. As a research method, an educational pattern was chosen through a preliminary experiment. Fit problems of the educational pattern were derived by wearing it on a virtual model with a turtle neck syndrome body type for each neck angle. Based on the three types of experimental patterns developed by supplementing these problems, a development pattern drafting method was developed for each neck angle. Three development patterns were compared and evaluated with the educational pattern using 3D virtual fitting. Fit problems of the educational pattern included: 1) insufficient ease amounts for hip, hem, bicep, elbow, and sleeve hem circumference; 2) horizontal items could not be leveled due to insufficient back length; 3) the shoulder line went backwards; and 4) the front center line did not form a vertical line. To solve these problems, an experimental pattern was developed by increasing the insufficient ease amount, increasing the insufficient back length, and correcting the position of the shoulder line. Measurements that differed in the pattern drafting method of the three types of development patterns by neck angle were positions of back center line and back neck point, front length, and front neck width. Through appearance evaluation of the development pattern and educational pattern by neck angle, the development pattern was highly evaluated, indicating that problems of the educational pattern were improved.

• 패션비즈니스
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• 제27권4호
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• pp.125-140
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• 2023

This study aimed to develop a smart wearable device for assessing the risk angle associated with turtle neck syndrome in patients with Video Display Terminal (VDT) syndrome. Turtle neck syndrome, characterized by forward head posture resulting from upper cross syndrome, leads to thoracic kyphosis. In this research, a stretch sensor was used to monitor the progression of turtle neck syndrome, and the sensor data was analyzed using a Universal Testing Machine (UTM) and the Gauge Factor (GF) calculation method. The scapula and cervical spine angles were measured at five stages, with 15-degree increments from 0° to 60°. During the experimental process, the stretch sensor was attached to the thoracic spine in three different lengths: 30mm, 50mm, and 100mm. Among these, the attachment method yielding the most reliable data was determined by measuring with three techniques (General Trim Adhesive, PU film, and Heat Transfer Machine), and clothing using the heat transfer machine was selected. The experimental results confirmed that the most significant change in thoracic kyphosis occurred at approximately 30° of forward head posture. Prolonged deformity can lead to various issues, highlighting the need for textile sensor solutions. The developed wearable device aims to provide users with real-time feedback on their turtle neck posture and incorporate features that can help prevent or improve the condition.

• 한국환경생태학회지
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• 제37권3호
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• pp.192-197
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• 2023

본 연구는 서울대공원 인공사육장에서 남생이(Mauremys reevesii) 알의 부화온도 차이에 따른 부화기간과 성장에 영향을 주는지 알아보고자 연구했다. 전체 201개의 남생이 알을 26(n=89)℃, 28(n=75)℃ 그리고 32(n=37)℃에서 각각 부화시켰다. 남생이 알의 부화온도와 부화기간은 온도에 따라 유의미한 차이를 나타내었다. 본 연구에서 부화 온도가 높을수록 부화율이 증가하였다. 26℃, 28℃, 그리고 32℃에서 부화한 알의 부화 기간은 각각 66.1(±4.0, n=52)일, 65.3(±3.3, n=44)일 그리고 58.8(±7.7, n=31)일이었다. 부화율은 32℃(83.8%)가 26℃(58.4%)와 28℃(58.7%)보다 상대적으로 높았다. 32℃에서 부화한 14일 된 새끼의 몸무게가 26℃와 28℃에서 부화한 14일 된 새끼의 몸무게보다 높았다. 그렇지만 부화 후 180일과 270일에 새끼의 몸무게는 부화 온도에 따라 큰 차이가 없었다. 본 연구에서 한국산 남생이(M. reevesii) 알의 부화 온도가 부화 기간과 성장 초기 남생이의 체중에 유의한 영향을 미치는 것으로 나타났다.