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Cervical spine reconstruction after total vertebrectomy using customized three-dimensional-printed implants in dogs

  • Ji-Won Jeon;Kyu-Won Kang;Woo-Keyoung Kim;Sook Yang;Byung-Jae Kang
    • Journal of Veterinary Science
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    • v.25 no.1
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    • pp.2.1-2.14
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    • 2024
  • Background: Sufficient surgical resection is necessary for effective tumor control, but is usually limited for vertebral tumors, especially in the cervical spine in small animal neurosurgery. Objective: To evaluate the primary stability and safety of customized three-dimensional (3D)-printed implants for cervical spine reconstruction after total vertebrectomy. Methods: Customized guides and implants were designed based on computed tomography (CT) imaging of five beagle cadavers and were 3D-printed. They were used to reconstruct C5 after total vertebrectomy. Postoperative CT images were obtained to evaluate the safety and accuracy of screw positioning. After harvesting 10 vertebral specimens (C3-C7) from intact (group A) and implanted spines (group B), implant stability was analyzed using a 4-point bending test comparing with groups A and C (reconstituted with plate and pins/polymethylmethacrylate after testing in Group A). Results: All customized implants were applied without gross neurovascular damage. In addition, 90% of the screws were in a safe area, with 7.5% in grade 1 (< 1.3 mm) and 2.5% in grade 2 (> 1.3 mm). The mean entry point and angular deviations were 0.81 ± 0.43 mm and 6.50 ± 5.11°, respectively. Groups B and C significantly decreased the range of motion (ROM) in C3-C7 compared with intact spines (p = 0.033, and 0.018). Both groups reduced overall ROM and neutral zone in C4-C6, but only group B showed significance (p = 0.005, and 0.027). Conclusion: Customized 3D-printed implants could safely and accurately replace a cervical vertebra in dog cadavers while providing primary stability.

The Effect of Reference Price Advertisements of Service on Consumers' Perception (서비스의 준거가격광고가 소비자 지각에 미치는 영향에 관한 연구)

  • Kim, Young-Man;Kim, In-Sub
    • Journal of Global Scholars of Marketing Science
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    • v.10
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    • pp.91-110
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    • 2002
  • The purpose of this research is as follows; First, the reference price ads are to investigate how the price cues and prior knowledge of service products have an effect on consumers' perception by the type of information. Second, this study suggests some marketing strategy guides to service marketing managers for price promotion strategy. To achieve these research goals, the hypothesis was established through reviewing the previous studies and the data collected from the experimental design. The experiment of this study was a 2$\times$2$\times$2 among the subject factorial design in which the factors were present in price cue presentation (presentation/non- presentation), the level of prior knowledge(high/low), and the type of information(positive/negative). The major findings of this research can be summarized as follows; First, there are some significant statistical differences in the consumers' perception value by level of price cues(hypothesis 1). Second, there are some significant statistical differences in the consumers' price-quality perception by level of price cues(hypothesis 2). Third, there are some significant statistical differences in the price-quality perception by the level of prior knowledge and the type of information(hypothesis 3).

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A Study on the Ecotour Programmes in New Zealand (뉴질랜드 생태관광프로그램에 관한 연구)

  • Choe, Jae-Woo
    • Journal of the Korean association of regional geographers
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    • v.10 no.2
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    • pp.286-299
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    • 2004
  • This thesis aims to explore the geographic synthesis of ecotour programmes in New Zealand as a foreign area study. In addition, this research will provide effective regional policies for ecotourism in Korea. To achieve the objectives, this research carried out a literature review before taking several field surveys in New Zealand. Research areas are Waitomo Caves, Kauri community, Wildlifes of Otago Peninsular, Whakarewarewa Maori Village, Milford Track in New Zealand. New Zealand ecotour programmes are generally organized by local residents. The programmes include entrance limitations, strict opening time schedules, well trained information officers and guides organized by local residents. Most of all activities are in relation to the programmes that have been developed for educational effects and environmental conservation. The case studies of New Zealand present a good model of how to succeed in ecotourism and conservation management to Korea.

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Measurement of High Temperature Anisotropic Elastic Constants of Zr-2.5Nb Pressure Tube Materials by Resonant Ultrasound Spectroscopy (초음파공명분광법에 의한 Zr-2.5Nb 압력관 재료의 고온 이방성 탄성계수 측정)

  • Cheong, Yong-Moo;Kim, Sung-Soo;Kim, Young-Suk
    • Journal of the Korean Society for Nondestructive Testing
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    • v.22 no.2
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    • pp.140-148
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    • 2002
  • Anisotropic elastic constants of Zr-2.5Nb pressure tube materials were determined by a high temperature resonant ultrasound spectroscopy (RUS). The resonant frequencies were measured using alumina wave-guides and wide band ultrasonic transducers in a small furnace. The rectangular parallelepiped specimens were fabricated along with the axial, radial and circumferential direction of the pressure tube. A nine elastic stiffness tensor for orthotropic symmetry was determined in the range of room temperature ${\sim}500^{\circ}C$. As the temperature increases, the elastic constant tensor, cij gradually decreases. Higher elastic constants along the transverse direction compared to those along the axial or radial direction are similar to the case of Young's modulus or shear modulus. A crossing of shear elastic constants along axial direction and radial direction was observed near $150^{\circ}C$. This fact corresponds to the crossing of c44 and c66 of single crystal zirconium.

A Study of Revitalizing Knowledge Management in Smartwork Environment (스마트워크 환경에서의 지식경영 활성화에 관한 연구)

  • Park, Dong-Jin;Kim, In-Whan;Lee, Yun-Jae
    • Journal of Digital Convergence
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    • v.9 no.4
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    • pp.223-233
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    • 2011
  • Smartwork will gradually move from the routine job to the knowledge based job. Therefore, supporting the personal level knowledge activities and the organizational level KM(Knowledge Management) will have a critical effect on the organizational performance. The purpose of this research is to develop strategies that revitalize the knowledge management for organizations that are trying to implement smartwork under such context. First of all, through the research results reviewed from areas such as current teleworking, telecommuting, mobile working and virtual organization, we identify the characteristics of the knowledge management for smartwork. And then, we develop and propose KM strategy that would supplement the existing knowledge management method and techniques in the smartwork environment. Academically, this paper emphasizes the further research needs about KM in terms of smart work. Operationally, it outlines and guides to the KM strategies for the government and enterprise planners that are designing smartwork.

Use of GIS to Archaeology (고고학연구에 있어 GIS 활용)

  • Ahn, Hyoung Ki
    • Korean Journal of Heritage: History & Science
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    • v.43 no.3
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    • pp.180-207
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    • 2010
  • Technological innovations in the 21th Century greatly change the society. The radical advance in computer science brought changes and increased efficiency into society in general. The field of archaeology is also highly influenced and attempts to improve previous manually conducted field survey and research have been actively made. In order to supplement incomplete data set from archaeological excavation, the ways to use computer have been highly explored. GIS is one of them. However, use of GIS has been limited to document locations and to produce distribution map of features using digital map. There are no proper guides to employ GIS for academic research, so that it is hard for beginners to learn how to make use of GIS. In this paper, functions of GIS are introduced even for beginners, including definition of GIS and its archaeological use. It is also explained how to get DEM from digital map to do spatial pattern analysis. Various GIS special pattern analyses using DEM and 3D simulation are presented, as well.

A Fundamental Study on the Standardization of Reference Model and Data Model in Digital Twin for Land (디지털 트윈 국토 참조 모델 및 데이터 모델 표준 구축을 위한 기초 연구)

  • Kim, Byeongsun;Yoo, Jaejun;Hong, Sangki
    • Journal of Cadastre & Land InformatiX
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    • v.51 no.1
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    • pp.5-22
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    • 2021
  • Digital Twin for Land(DTL) is one of the national work projects in the Korean New Deal but there aren't still any standards and technical guides which would need to construct the DTL. This study presents the policies to develop reference model and data model based on geo-spatial information standards to ensure interoperability for the DTL. In this paper, we first extract the implications through reviewing definitions of Digital Twin used in various literatures and international standardization trends on Digital Twin. In addition, this study attempts to conceptualize the DTL through various ways such as defining the DTL and characterizing DTL domains. Finally, we propose three policies on the standardization of the DTS: (1) DTS reference model by using RM-ODP, (2) three-steps hierarchical data models, and (3) model registry to manage the data models efficiently. The proposed policies of the study would contribute to establish a way for DTS's standards development over the coming years.

About dentistry infection from dentistry medical institution recognition research of patient (치과내원환자의 감염관리에 관한 인식도 조사)

  • Lee, Youn-Kyung;Kim, Soon-Duck
    • Journal of Korean society of Dental Hygiene
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    • v.10 no.4
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    • pp.617-625
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    • 2010
  • Objectives : The research which sees collected information about dentistry infection management recognition of the patients and the infection management which the medical treatment consumer does in necessity is what, grasped and satisfaction and became the fundamental data which makes the hospital will be able to trust about dentistry image rise and dentistry environment of the medical treatment consumer who assists a dentistry character executed. Methods : From 2009 April 1st until May 28th 233 people common people who have the experience which visits a Gyeongsangnam-do area dentistry the object with the entry question law which sleeps did and the data analysis SPSS, 12.0 For Window under using produced each question item by frequency and a ratio, the analytical degree of infection management One - Way ANOVA stamps and executed t-test. Results : Information experience experienced about dentistry infection of the investigation object person to be, appeared with 74.7% and the after that dentistry assistance at the time of conduct change which experiences the answer back regarding of Former times attentively observes organization disinfecting' was most with 46.6%. The protective equipments wearing goal of the dentistry medical attendance appeared the dentistry medical attendance and patient protection 77.7%, dentistry medical attendance protection 12.9%, by patient protection 9.4% order. Before medical treatment starting of the dentistry medical attendance the hand Does not confirm' appeared 72.1%, with. The hand washing, is whole and the degree which appears is high with 4.11 points the stamp. Is high there was a possibility of knowing the thing about the recording infection where the educational background will be high and considers statistically the difference which was visible Conclusions : The education which is active and continuous is necessary about infection management and sets the guides which are standardized to the patients and about infection management and about infection prevention and exposes from dentistry practices well to emboss the thing is thought that there is a necessity to plant a trust feeling about the dentistry where the patients assist.

Current Status and Barriers to Health Care Services for Nursing Home Residents: Perspectives of Staffs in Korean Nursing Homes (노인요양시설 건강지원서비스 현황과 장애요인: 포커스 집단 면접)

  • Park, Yeon-Hwan;Bang, Hwal Lan;Kim, Ga Hye;Oh, Seieun;Jung, Young-Il;Kim, Hongsoo
    • Korean Journal of Adult Nursing
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    • v.27 no.4
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    • pp.418-427
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    • 2015
  • Purpose: Focus group interviews were conducted to explore the current status and barriers of health care services in nursing home from the viewpoint of staffs taking care of nursing home residents. Methods: A qualitative thematic analysis using the focus group interview method was used. A total of 32 health care professionals (19 nurses and 13 social workers) from thirteen nursing homes in South Korea attended (5 focus groups) in 2014. Results: The two main themes were identified: 'minimal health care services that left personal care needs unmet' which has three subthemes of 'stereotyped and fragmented care by types of care providers', 'medically-oriented health care services' and 'health care services mixed with social or recreational programs'; and 'barriers to proper and timely care in nursing homes' with four subthemes including 'unmet care needs due to cognitive dysfunction or lack of expression', 'care guides or tools not suitable for long-term care facilities', 'health care needs that are beyond the facility's care boundary', and 'care delay due to lack of understanding on the older adult's status'. Conclusion: The findings from this study should help health care policy makers to recognize the factors that influence health care services and provide direction for nurses and other staffs involved in supporting health care services for nursing home residents.

Study on Librarian Service Providers' Awareness and Perceptions of Library Services for the Disabled

  • Noh, Young-Hee;Ahn, In-Ja;Park, Mi-Young
    • International Journal of Knowledge Content Development & Technology
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    • v.1 no.2
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    • pp.29-42
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    • 2011
  • The purpose of this study is to improve library promotional marketing for the disabled by identifying requirements of public library disability services. This study aimed to investigate librarian service providers' awareness of library programs for the disabled in order to prepare a systematic plan for promoting such library services. Research methods used are a literature analysis and survey. First, the ratio of respondents with experience promoting activities and services for the disabled was less than 50%. Second, regarding methods for promoting library disability services, the respondents used library homepages, press releases, library user guides, library newsletters, and library pamphlets in that order. Third, when asked what kind of PR media the library disability service providers had experience with and how often they use it, library boards and banners were the most common response. Fourth, suggested improvements to the current design and content of PR materials included: clearer word choice (or greater understandability), more detailed descriptions, simpler layouts, and more interesting or eye-catching content in that order. Fifth, the library disability services which are in the most need of public relations were guide information for library disability services, Library and Information Service (DOI services and search services), using alternative materials and the library collection, and aiding the information search. Overall, when evaluating the promotion of disability services in Korea, the library's public relations for disabled services needs to improve because currently neither librarians nor the disabled community they are targeting has frequent or quality experience with it. Thus, the policy department for the library disability services must develop a variety of promotional strategies adjusted for each type of the disability and distribute PR materials to service providers individually, making sure to utilize effective PR methods.