• 제목/요약/키워드: THA

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Measures of micromotion in cementless femoral stems-review of current methodologies

  • Solitro, Giovanni F;Whitlock, Keith;Amirouche, Farid;Santis, Catherine
    • Biomaterials and Biomechanics in Bioengineering
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    • v.3 no.2
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    • pp.85-104
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    • 2016
  • Stability and loosening of implanted femoral stems in Total Hip Replacement have been well established as barriers to the primary concerns of osseointegration and long term implant survival. In-vitro experiments and finite element modeling have for years been used as a primary tool to assess the bone stem interface with variable methodologies leading to a wide range of micromotion, interference fit and stress shielding values in the literature. The current study aims to provide a comprehensive review of currently utilized methodologies for in-vitro mechanical testing as well as finite element modeling of both micromotion and interference of implanted femoral stems. A total of 12 studies detailed in 33 articles were selected for inclusion. Experimental values of micromotion ranged from 12 to $182{\mu}m$ while finite element analysis reported a wider range from 2.74 to $1,277{\mu}m$. Only two studies were found that modeled bone/implant contact with consideration for interference fit. In studies evaluating stem micromotion in THA, the reference surface at the bone/stem interface should be well defined. Additionally, the amount of penetration considered should be disclosed and associated with bone density and roughness.

Spectrophotometric Determination of Cadmium and Copper with Ammonium Pyrrolodinedithiocarbamate in Nonionic Tween 80 Micellar Media

  • Lee, Seung Gwon;Choe, Hui Seon
    • Bulletin of the Korean Chemical Society
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    • v.22 no.5
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    • pp.463-466
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    • 2001
  • The determination of Cd2+ and Cu2+ with ammonium pyrrolidinedithiocarbamate (APDC) in Tween 80 micellar media has been studied. The UV-visible spectrum of Cd(PDC)2 complex in Tween 80 media had more sensitivity tha n in chloroform. Although the UV-visible spectrum of the Cu(PDC)2 complex in Tween 80 media had somewhat less sensitivity than that in chloroform, absorbance data of Cu2+ were more reproducible in Tween 80 media. The Cd(PDC)2 and Cu(PDC)2 complexes were very stable at pH 7.0 for up to 100 minutes and could be quantitatively chelated if APDC were added to the sample solution more than 30 times the moles of Cd2+ and Cu2+ . The optimum concentration of Tween 80 was 0.1%. The calibration curves of Cd(PDC)2 and Cu(PDC)2 complexes with good linearity were obtained in 0.1% Tween 80 media. The detection limits of Cd2+ and Cu2+ were 0.0493 ㎍mL-1 and 0.0393 ㎍mL-1 , respectively. Recovery yields of Cd2+ and Cu2+ ions in the spiked real samples were almost 100%. Based on experimental results, this proposed method could be applied to the rapid and simple determination of Cd2+ and Cu2+ in real samples.

An Experimental Study on Measurement of the Reaction Order of a Liquid Fuel with Various Components (혼합 액체연료의 화학반응차수 계측에 관한 실험적 연구)

  • Choi, Hyo-Hyun;Lim, Jun-Seok;Kim, Chul-Jin;Sohn, Chae-Hoon
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.04a
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    • pp.421-424
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    • 2011
  • Thermal Analyses are conducted to measure various factors of a liquid fuel required for numerical analysis. Thermal Analyses are divided into two different methods of TGA (Thermo Gravimetric Analysis) and DSC (Differential Scanning Calorimetry). Non-isothermal experimental results are analyzed using by TGA. The results are filtered by a Freeman Carroll method. At the same time, chemical parameters of unknown liquid fuel, activation temperature and reaction order are measured to 6128.2 K and 1.4, respectively. Furthermore, the parameters can be obtained by various mathematical methods. It is found that tha parameters depend on the processing method.

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Distribution of supply chain capabilities and firm's sustainable development

  • TO, Tha Hien;THAN, Thuy Trong;NGUYEN, Duyen Thi Kim;NGUYEN, Dat Ngoc
    • Journal of Distribution Science
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    • v.19 no.5
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    • pp.5-12
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    • 2021
  • Purpose: Research on supply chain sustainability is important for exporters When the factor of sustainable development is considered by the businesses as well as governments of all countries. Research on supply chain sustainability is important for exporters. Sustainable supply chain management and supply chain dynamics will help enterprises adapt to changes in the business environment. This study analyzes the impact of sustainable supply chain management, and supply chain dynamic capabilities on the sustainable development of exporting enterprises in Vietnam. Research design, data, and methodology: The research model and survey are designed based on previous studies after surveying export enterprises. With 185 samples collected from export enterprises. The Structural Equation Modeling (SEM) analysis technique is used. Data analysis is performed on SPSS and AMOS software (Reliability test, Confirmatory Factor Analysis, SEM). Results: Sustainable supply chain management and supply chain dynamic capabilities all have positive effects on the sustainable development of businesses (sustainable development is measured by distribution: measuring economic efficiency, social efficiency, and environmental performance). Conclusions: From the results of this study, the authors also made several recommendations to help export enterprises develop sustainability based on sustainable supply chain management and supply chain dynamic capabilities.

Purchase Intention of Certified Coffee: Evidence from Thailand

  • UT-THA, Veenarat;LEE, Pai-Po;CHUNG, Rebecca H.
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.8
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    • pp.583-592
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    • 2021
  • This study examines social identity and self-identity as the antecedents of the theory of planned behavior (TPB) model in predicting purchase intention of certified coffee, whereas perceived trustworthiness (PT) is evaluated whether it directly affects intention and/or indirectly through attitude. In addition, ethics and luxury are investigated as the salient beliefs affecting attitude formation in this regard. A face-to-face survey was conducted with 727 coffee consumers in Thailand. Confirmatory factor analysis is applied to assess the adequacy of the model, followed by structural equation modeling to evaluate the hypotheses proposed for the relationships between constructs in an extended TPB model. The results confirm that self-identity is the most influential antecedent on attitude when compared to social identity, and attitude, in turn, is the strongest determinant in predicting purchase intention. PT has a direct positive effect on purchase intention, meanwhile, ethical, luxury beliefs, and PT are confirmed to portrait the attitude formation. As such the marketing campaigns can address manipulating consumers' beliefs on both ethical and luxury aspects as well as PT, along with consumers' social identity and self-identity to fortify a positive attitude toward certified coffee. Then the actual purchase behavior can be foreseen based on empirical evidence.

Cycle Detection Using Single Edge Node Pruning (단일 간선 노드 전정 사이클 검출)

  • Sang-Un Lee
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.24 no.1
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    • pp.149-154
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    • 2024
  • This paper proposes an algorithm that remedy Floyd's the tortoise and the hare algorithm (THA) shortcomings which is specialized in singly linked list (SLL), so this algorithm fails to detect the cycle in undirected graph, digraph, and tree with multiple inputs or outputs. The proposed algorithm simply pruning the source and sink with only one edge using cycle detection of single edge node pruning. As a result of the experimental of various list, undirected graph, digraph, and tree, the proposed algorithm can be successively detect the cycle all of them. Thus, the proposed algorithm has the simplest and fastest advantage in the field of cycle detection.

Cultural and Trade Links between India and Siam: TheirImpact on the Maritime Silk Road

  • Dayalan DURAISWAMY
    • Acta Via Serica
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    • v.9 no.1
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    • pp.67-90
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    • 2024
  • India, Southeast Asia in general, and Siam in particular share a long history of cultural and commercial relations. Located in each other's extended neighbourhood, India and Thailand have a shared maritime boundary in the Andaman Sea. Situated in the strategic position, midway between West Asia on the one hand and East Asia on the other, India and Siam combined played a significant role in the maritime transactions in Asia and beyond. The geographical proximity between India and Siam led to multifaceted maritime interactions and exchanges. Siam was in the Indian sphere of cultural, religious, philosophical, technical, and linguistic influence much before the Common Era. The cultural and mercantile networks between India and Siam are well-attested by archaeological and literary sources. The archaeological findings in Siam and other Southeast Asian countries have revealed the dynamic trade and cultural exchange between India and Southeast Asia since the pre-Common Era. The Takola (modern Takua Pa) area served as a more suitable landing place for Indian merchants and there existed the settlement of the Indian mercantile community. Ligor (Nakhon Si Thammarat), Jaya (Chaiya), Patalung (Phatalung), U Thong, Ban Don Tha Pet, Ban U Taphao, Khao Sam Kaeo, and many other sites in Siam have brought to light a large variety of objects which demonstrate that ancient Siam had close mercantile contact with India as well as the Mediterranean world and China. The paper discusses in detail the cultural and trade links between India and Siam and their impact on the Maritime Silk Road.

A Study on the Son Preference and Related Factors among married Women in Metro Manila Philippines (필리핀 기혼 여성의 남아선호와 관련변인에 대한 연구 -메트로 마닐라 지역을 중심으로)

  • 김용미
    • Journal of Families and Better Life
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    • v.16 no.3
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    • pp.25-38
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    • 1998
  • The purpose of this study was to investigate the phenomenon of son preference and the related factors among married women in Metro Manila Philippines and to compare between Filipino women and Chinese-Filipino women in many respects. Local schools were contacted for recruitment of participants (n=206) The results showed that more than a half of the respondents(54.5%) preferred a son for the first child. On the other hand almost a half(44.7%) preferred a daughter for the second child. It is interesting that almost a third of married women showed an equal preference between a son and a daughter for the first child (34.2%) and the second child (31.2%) The results of multiple regression analysis revealed that son preference was most strongly related to women's patriarchal attitude and orientation and secondly to a strong son preference for the first child. Two groups of women Filipino and Chinese-Filipino were compared in the level of parental support and expectation for sons and d ughters perception of women's position in family and society patriarchal attitudes and orientation sex preference for the first and the second child reasons of son preference and demographic characteristics. It was found that filipino women tended to prefer a daughter for the second child much more and to perceive women's position much higher than Chinese-Filipino women. Filipino mothers showed an equal level of support and expectations for sons and daughters much more than Chinese groups. For the reasons of son preference it was notable that Filipino women tended to rely on sons in old age much more than Filipino counterparts. Based on the findings of this study three factors were found strong enough to drawour attention. Daughter preference high position of women and equal support for sons and daughters appeared to be closely related in a meaningful way. Future studies need to focus on the relationships among three factors in depth Three factors suggest some important direction tha a strong son preference country like Korea need to head forward in a near future.

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Quality Characteristics of Dropwort Powder added Yanggaeng (미나리 가루 첨가 양갱의 품질특성)

  • Oh, Kyung-Chul
    • Culinary science and hospitality research
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    • v.21 no.6
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    • pp.291-302
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    • 2015
  • This study investigated the physicochemical and sensory characteristics of yanggaeng prepared with various amounts of dropwort powder. According to the results, the $^{\circ}Brix$ value, pH, and moisture contents of yanggaeng decreased significantly with the addition of dropwort powder. The results of color measurement analysis reveal tha t L value, a value, and b value of the groups with dropwort powder werelower than those of the control group. Texture measurement scores in terms of hardness, cohesiveness, chewiness, and brittleness for yanggaeng showed that 1~4% of substituted sample groups were higher than those of the control group. DPPH radical scavenging activity of the control group was 24.20%, whereas groups with the added dropwort powder ranged from 33.56~58.80%. As dropwort powder increased, antioxidative activity also increased. Sensory evaluation scores in terms of color, odor, taste, texture, and overall preference of groups with 1% and 2% of dropwort powder did not show any significant differences when compared to the control group. Based on the above results, this study suggests that the addition of 2% dropwort powder may be the best substitution ratio for yanggaeng.

Systemic Review on The Research Trend of Gastrodiae Rhizoma and Relationship Between the Herbology and KCD-code (천마(天麻)의 국내,외 연구동향과 『본초학』, 한국표준질병사인분류의 상관관계에 대한 체계적 문헌고찰)

  • Kim, Hyun-Seok;Lee, Soong-In;Jeong, Jong-Kil
    • The Korea Journal of Herbology
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    • v.31 no.2
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    • pp.21-37
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    • 2016
  • Objectives : The study was aimed to analyze the correlation between Herbology and contemporary research results, KCD-codes and terms. The study will present information that can be used to find the direction of further researches and be applied to the education of Herbology.Methods : Papers were searched in OASIS and PubMed. Papers were then categorized as "medicine and pharmacy articles" or "articles unrelated to medicine and pharmacy." Medicine or pharmacy articles about Gastrodiae Rhizoma were matched with treatments in Herbology and KCD-codes. Medicine and pharmacy articles which did not research Gastrodiae Rhizoma mainly and articles unrelated to medicine and pharmacy were categorized and analyzed. KCD-codes and terms were arranged by treatments in Herbology. Research types, the number of papers, and the citation count were arranged by each treatment in Herbology. Degrees of Herbology research were represented as a table and a graph.Results : There were 148 Medicine and pharmacy articles about Gastrodiae Rhizoma, 76 medicine and pharmacy articles which did not studied Gastrodiae Rhizoma mainly, and 120 articles unrelated to medicine and pharmacy. Researches on Senility and hypertensive diseases were conducted to the degree of clinical research. Numbness of the limbs scored 617, Epilepsy and convulsions scored 257.Conclusions : The study suggests that there were 148 medicine and pharmacy articles about Gastrodiae Rhizoma. Epilepsy and convulsions were the most researched treatment in Herbology. Of the medicine and pharmacy articles tha t did not match treatments in Herbology, there were clinical research articles researching on senility which can be used in the Herbology education field.