• Title/Summary/Keyword: internal materials

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Comparison of Herbs in Prescription Composition of Consumptive Disease and Internal Injury in Donguibogam Through Network Analysis (네트워크 분석을 통한 동의보감(東醫寶鑑) 내상(內傷)문과 허로(虛勞)문의 처방 구성 본초 비교)

  • Chien-hsin Kuo;Heung Ko;Seon-mi Shin
    • The Journal of Internal Korean Medicine
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    • v.44 no.1
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    • pp.35-52
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    • 2023
  • Objective: Internal injuries and consumptive disease have different causes, yet they can affect each other. The relationship and combination of prescription drugs in the clinical practice of internal injuries and consumptive disease were analyzed for various diseases of "Donguibogam" through network analysis. Methods: The prescriptions used in consumptive disease and internal injury were established by conducting a full survey on the papers extracted from Donguibogam. The R version 4.0.3 (2020-10-10) and the igraph and arules package were used to perform network analysis and association rule relationship mining analysis in the first and second prescription compositions. Results: The herb frequently used for internal injury was Glycyrrhizae Radix, while the herb combination frequently used was Citri Pericarpium-Glycyrrhizae Radix. For centrality, the main factor was generally Glycyrrhizae Radix. In the case of consumptive disease, the herb most frequently used was Angelicae Gigantis Radix, and the combination most frequently used was Rehmanniae Radix Preparata-Angelicae Gigantis Radix. In terms of centrality, it was Angelicae Gigantis Radix. As a result of the network analysis of herbal prescription frequency, each group was divided into three. Conclusion: The interrelationship between internal injury and consumptive disease prescription drugs may reveal the differences and similarities between internal injury and consumptive disease and may serve as a basis for the development of new drugs or materials that can enhance mutual effectiveness in the treatment of internal injury and consumptive diseases.

Effect of cyclic loading and retightening on reverse torque value in external and internal implants

  • Cho, Woong-Rae;Huh, Yoon-Hyuk;Park, Chan-Jin;Cho, Lee-Ra
    • The Journal of Advanced Prosthodontics
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    • v.7 no.4
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    • pp.288-293
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    • 2015
  • PURPOSE. The aim of this study was to evaluate the effect of cyclic loading and screw retightening on reverse torque value (RTV) in external and internal type implants. MATERIALS AND METHODS. Cement-retained abutments were connected with 30 Ncm torque to external and internal type implants. Experimental groups were classified according to implant connection type and retightening/loading protocol. In groups with no retightening, RTV was evaluated after cyclic loading for 100,000 cycles. In groups with retightening, RTV was measured after 3, 10, 100 cycles as well as every 20,000 cycles until 100,000 cycles of loading. RESULTS. Every group showed decreased RTV after cyclic loading. Before and after cyclic loading, external type implants had significantly higher RTVs than internal type implants. In external type implants, retightening did not affect the decrease in RTV. In contrast, retightening 5 times and retightening after 10 cycles of dynamic loading was effective for maintaining RTV in internal type implants. CONCLUSION. Retightening of screws is more effective in internal type implants than external type implants. Retightening of screws is recommended in the early stage of functional loading.

Surgery and Metronomic Chemotherapy in a Pet Rabbit (Oryctolagus cuniculus) with Mammary Gland Adenocarcinoma

  • Jihee Hong;Jeong-Min Lee;Ji-Young Lee;Han-Joon Lee;Dong-Kwan Lee;Joong-Hyun Song;Kun-Ho Song
    • Journal of Veterinary Clinics
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    • v.40 no.6
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    • pp.445-451
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    • 2023
  • An 8-year-old female pet rabbit presented at the veterinary clinic for mammary gland palpation due to the presence of a mass. Upon physical examination, a mass was identified in the left fourth mammary gland. Abdominal ultrasonography revealed a 3 × 2 cm mass in the right uterus and general thickening of the endometrium, suggesting uterine sinusitis. Multiple pulmonary nodules suspected to be metastatic lesions were identified on chest radiography. Surgery was performed to mastectomy and ovariohysterectomy (OHE). The histopathological examination of the tumor revealed mammary gland adenocarcinoma (simple-type) with multiple nodules consisting of the proliferation of tumor cells forming tubules containing secretory materials, cellular debris, and solid nests with a central area of necrosis. Metronomic chemotherapy was performed with cyclophosphamide and lomustine (CCNU) based on the histopathological findings. The quality of life has been well maintained, with no specific clinical symptoms observed for 8 months after metronomic chemotherapy. To the best of authors' knowledge, this study is the first to examine the effects of metronomic chemotherapy with cyclophosphamide and lomustine in a pet rabbit.

Selection and Conservation for the Filler of Three-storied Stone Pagoda at the West of Gameunsaji Site in Gyeongju (경주 감은사지서삼층석탑 충전제 선정과 보존처리)

  • Lee, Tae-Jong;Kim, Sa-Dug;Gal, Seo-Yeon
    • Journal of Conservation Science
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    • v.26 no.4
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    • pp.361-370
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    • 2010
  • The open pore of stone cultural heritage is not expected to have an effect only by consolidation, and it has a drawback that only the internal wall adheres and gets consolidated due to the incrase of liquidity caused by the low viscosity and difference of materials in the case of filling with high molecules synthetic resins. Therefore, this research selected the effective filler for Three-storied Stone Pagoda at the West of Gameunsaji Site through the verification of filling effects of materials using the information about various fillers based on minerals. As the result of filler experiment, got filled with the combination of KSE 500 STE + KSE Filler A${\cdot}$KSE Filler B that is the same as the Member or has very similar properties. The total surface area of the west stone is $252.6m^2$ and the area where the internal opening has been developed is $17.77m^2$(7.03%) requiring a task that fills the internal($24,885m{\ell}$).

Simulation Study for the Performance Improvement of the Injector Module for Heavy-duty CNG Engines (대형 CNG 엔진용 인젝터 모듈의 성능 개선을 위한 연구)

  • Kim, Yong-Rae;Park, Won-A;Kim, Chang-Gi;Lee, Jang-Hee
    • Journal of the Korean Institute of Gas
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    • v.20 no.4
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    • pp.1-6
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    • 2016
  • A fuel supply system of heavy-duty CNG engine is composed as a module structure which is integrated by about 6 injectors. There are only one input and output passage for gas fuel supply in this injector module. The response performance for transient operation of an CNG engine is very poor because only one output fuel supply line is connected to the intake pipe after a throttle valve. In this study, a new guideline and internal flow design for the CNG injector module is suggested for the improvement of response performance by fluid dynamic simulations. As a result, the response performance of gas fuel supply can be improved by decreasing the total volume of internal flow passages and a same distance design from each injector to the exit of module shows good response performance and acquirement of linearity of fuel supply. But the injection order has little influence to injection performances.

Experimental Determination of Complex Moduli and Internal Damping of Laminated Composites (적층 복합재료의 내부감쇠와 복소탄성계수 측정에 관한 연구)

  • Lee, Jae-Hyeok;Park, Se-Man;Kim, Hyeong-Sam
    • Korean Journal of Materials Research
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    • v.8 no.10
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    • pp.905-911
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    • 1998
  • Damping is a property for materials and systems to dissipate energy during periodic deformations. Generally, damping causes stiff decrease in amplitudes and shifts in phases. Also, even at resonance, amplitudes are substantially attenuated. This phenomenon of damping helps in reducing stresses developed during vibrations and consequently improves fatigue lives of materials. In this work internal damping and complex moduli are experimentally determined. An impulse technique is utilized in experiments and cantilever beams are selected as test subjects for the measurements of flextural vibrations since the beams lend themselves easily as simplistic ideal models. A resonance method is employed to determine resonance frequencies which are utilized to compute storage moduli. Also, loss moduli are evaluated from damping capacities and storage moduli. The storage and loss moduli combined yield complex moduli. Finally internal damping is evaluated from bandwidth technique, the real component of the transfer function.

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Development of 3D Printing Cement Based Composite Materials Applying for Exterior Finishing Material (건물 외장재 적용을 위한 3D 프린팅 시멘트 베이스 결합재 개발)

  • Shin, Hyeon-Uk;Song, Hun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.83-84
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    • 2018
  • 3D printing technology can be applied to various industries, and is trapped by major technologies that change existing manufacturing processes. 3D printing materials must satisfy designability, economy and productivity, and building materials are required to have strength and economy secured technology. 3D printing technology of construction field can be divided into structural materials and internal and external materials, and is mainly done by extruding and adapting. Particularly when it is applied as an exterior materials, it is mainly applied to an unstructured exterior materials and high accuracy is required. The exterior materials can be used as a cement composite materials, it is suitable also for a lamination type, and the role of a cement base bonding material is important. In this research, we developed a cementitious base binder applicable as a 3D printing exterior materials, confirmed density and strength characteristics for application as an exterior materials, a flame retardancy test for improving the fire resistance of buildings and confirmed its possibility.

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High Temperature Compressive Strength of Polymer Cement Composite Apply for 3D Printing Exterior Materials (시멘트 폴리머를 사용한 외장재용 결합재의 고온강도 특성)

  • Shin, Hyeon-Uk;Song, Hun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.05a
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    • pp.116-117
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    • 2019
  • 3D printing technology can be applied to various industries, and is trapped by major technologies that change existing manufacturing processes. 3D printing materials must satisfy designability, economy and productivity, and building materials are required to have strength and economy secured technology. 3D printing technology of construction field can be divided into structural materials and internal and external materials, and is mainly done by extruding and adapting. Particularly when it is applied as an exterior materials, it is mainly applied to an unstructured exterior materials and high accuracy is required. The exterior materials can be used as a cement composite materials, it is suitable also for a lamination type, and the role of a cement base composite material is important. In this research, we developed a cementitious base binder applicable as a 3D printing exterior materials, confirmed high temperature strength characteristics for application as an exterior materials of buildings and confirmed its possibility.

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