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Comparative analysis of existing reinforced concrete buildings damaged at different levels during past earthquakes using rapid assessment methods

  • Sezer Aynur;Hilal Meydanli Atalay
    • Structural Engineering and Mechanics
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    • v.85 no.6
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    • pp.793-808
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    • 2023
  • Türkiye is located in a region where destructive earthquakes are frequently experienced due to its geological characteristics and geographical location. Therefore, considering the possibility of a devastating earthquake at any time, determining the reinforced concrete (RC) building seismic safety, constructed before or after the current seismic buildings code, is one of the most important issues to be completed firstly. For this purpose, rapid assessment methods developed to quickly determine the seismic safety of buildings are available in the literature. Comparison of the principles of Principles of the Determination of Risky Structures-2019, Column and Wall Index Method, P25 Scoring Method and Improved Discriminant Analysis Method, which are among these methods, have been aimed within the scope of this study. Within the scope of this paper, a total of 43 buildings in the Yalova/Çınarcık region of Türkiye that the damage level was determined by street observation method immediately after the 1999 Kocaeli (Izmit) Earthquake; 15 buildings with heavy damage and 28 buildings with moderate damage were examined by rapid assessment methods. Although the risk detection difference was not separated as a clear line in any of the methods used, the results obtained from the rapid assessment methods are evaluated as being compatible with the detected after earthquake structural seismic behavior of the buildings. The PDRS-2019 and column and wall index method gave the most approximate results. In the results obtained from the analyzes; structural features such as number of floors, frame continuity, soft/weak story irregularity, effective shear strength area, existence of heavy overhangs in plan, type of structural system have been found to be significantly effective on the earthquake behavior of buildings.

Should Korean Medicine doctors use modern diagnostic medical devices? Survey result of public perspectives (국민인식을 기초로 한의사의 현대 진단의료기기 사용 법제화 필요성에 대한 제언 : 설문조사를 중심으로)

  • Juchul Kim;Byoungcheun Hwang;Manki Hwang;Seungmin Kathy Lee;EunHee Yi;Jungtae Leem
    • The Journal of Korean Medicine
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    • v.43 no.3
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    • pp.94-105
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    • 2022
  • Objectives: This study investigated public opinion on the use of modern diagnostic medical devices by Korean Medicine doctors. Methods: A questionnaire looking into perceptions on the use of modern medical devices was developed. It was distributed by a third party and data was collected. Results were analyzed through frequency analysis, chi-square analysis (χ2-test), frequency and cross analysis using R program. The measurement variable in the study was the respondent's perspectives and expectations on the use of modern diagnostic medical devices by Korean Medicine doctors. The maximum significance level was 0.05. Results: There were a total of 3,000 responses and 80.8% of the respondents replied that there is a need for government-level discussion on endowing rights to Korean Medicine doctors as supervisors for safety management of radiation generating devices. Also, 83.3% of the respondents agreed the use of ultrasound imaging equipment in Korean Medicine clinics should be legalized. Conclusions: According to this study, respondents strongly support the use of modern diagnostic medical devices by Korean Medicine doctors. This is the first study to investigate public opinion in this area and it provides a significant insight into the public needs and desires for a wider scope of practice for Korean Medicine in the healthcare system.

A study on the estimate of construction management cost for public construction project in the CM for fee contract (정부공사 건설 사업관리 용역의 대가 산정에 관한 연구)

  • Chung J.-Young;Yoon Tae-Kwon
    • Journal of the Korea Institute of Building Construction
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    • v.6 no.3 s.21
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    • pp.115-122
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    • 2006
  • This study is aimed to get clear model for CM fee level in public construction project. For the practical use and main target, CM for fee contract only is assessed and analysed. Cost estimate by percentage of total contract sum and method based on the historical construction data have significant deficiency. An regression model and probabilistic model are suggested with 9 independent variables. In the case of limited work scope, an element based floor area model is suggested and concluded with fish-bone scheme.

The Estimation of the Energy Consumption and $C0_2$ Emission at the Construction Stage in the Apartment Housing (공동주택 건설단계 공종별 에너지소비량 및 이산화탄소 배출량 산정연구)

  • Kim, Dae-Hee;Kwon, Bo-Min;Choi, Young-Oh;Lee, Kang-Hee
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2006.11a
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    • pp.328-333
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    • 2006
  • A few methodologies have been recently developed to estimate the environmental affect when various materials and components are used in building life cycle. The direct survey method has limitations to analyze the environmental problems because of the limit of survey scope and cost. Therefore, another indirect method has been developed as alternatives. The indirect method is represented as input-output analysis. This paper aimed at analyzing the estimation the environmental affect of building materials and works at building construction, utilizing the input-output analysis as a indirect estimation method. The results suggested that the building works is overally responsible for the energy consumption and $CO_2$ emission. In other words, Over the 80% of the total consumption and $CO_2$ emission are resulted at the building work.

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A Study on the Factors Influencing Cyberbullying Behaviors among SNS Users (SNS 사용자의 사이버불링 행위에 영향을 미치는 요인에 관한 연구)

  • Mun, Changbae;Sura, Suaini;Ah, Jongchang
    • Journal of Information Technology Services
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    • v.14 no.1
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    • pp.175-194
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    • 2015
  • As the explosive growth of SNS users, SNS affects every aspect of our lives. Beyond the individual's scope there is a powerful influence in society. Now cyber bullying is a big problem of this society. To analyze the relationship between the SNS user features and cyber bullying phenomenon, various SNS user's personal and social characteristics were set to variables affecting the cyber bullying phenomenon on the SNS. For the research, questionnaire survey was conducted for total 200 subjects among 10~60 age band in each region across the country. We set a research model including the items that are found to be affected in cyber bullying through the prior researches. To analyze interrelation of cyber bullying phenomenon and the general characteristics of SNS users, multiple regression analysis and other analyses were conducted. As a statistical result, we found the correlation among variables and the suggestion points for a SNS platform development direction.

A Review on the Relationship of Ergonomics and Industrial Hygiene

  • Park, Hee-Sok
    • Journal of the Ergonomics Society of Korea
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    • v.31 no.2
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    • pp.407-411
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    • 2012
  • Objective: The objective of this paper is to examine the scope of ergonomics in relation to the discipline of industrial hygiene. Background: There has been increasing recognition of the importance of ergonomics in the practice of industrial hygiene. As a result, quite a number of ergonomics-related research articles have been published in major industrial hygiene journals. And the professional engineers in industrial hygiene have conducted ergonomics-related activities. Method: This paper reports the results from the literature review of the ergonomics papers published in major industrial hygiene journals for the last 5 years, and the certification of industrial hygiene and ergonomics. Results: It was found that 7.7~13% of the total published papers were about ergonomics, and the number of the professional engineers in industrial hygiene is almost double of that of ergonomics. Conclusion: It should be understood that the work of ergonomic is complementary to industrial hygiene and not in competition with it. Application: Some suggestions were proposed hopefully helpful to colleague ergonomists for future research.

A Comparative Analysis on the Work Importance of Customized and Expansion Remodeling Project (맞춤형 및 증축형 리모델링 공사의 업무중요도 비교·분석)

  • Kim, Min-Jae;Son, Chang-Baek
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.11a
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    • pp.66-67
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    • 2015
  • This study compared and analyzed the job importance that site managers perceived by dividing the study scope into customized and expansion remodeling projects and deriving the job descriptions from previous studies. As a result, a total of 7 construction stages and 53 job descriptions were derived. As job importance in customized remodeling projects, removal and demolition works were the most important, followed by preliminary survey, and repair and reinforcement works. In addition, as job importance in expansion remodeling projects, preliminary survey is the most important, followed by civil engineering work, and repair and reinforcement works. It is considered that the job importance of the remodeling projects derived in this study will contribute to improving their job efficiency in the future.

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A Study on Flight inspection cost analysis and Proper commissions calculator (비행검사용 항공기 수수료 분석 및 적정 수수료 산정에 관한 연구)

  • Kim, Woong-Yi;Choi, Youn-Chul
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.20 no.4
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    • pp.126-131
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    • 2012
  • In South Korea, there is no consideration for increasing labor costs and price fluctuation regarding the commission for a flight inspection. Because this causes a deficit in the flight inspection related operation, the cost system should be improved. Therefore, this research considers the first cost analysis in order to calculate a proper flight inspection commission through three different types of cost making methods. Moreover, as flight inspections are held by flights and human labors, labor costs are included as the main operation cost. According to the research, it is analyzed that the total cost to process flight inspection operations is decided by the scope of aircraft operation.

Optical dielectric function of impurity doped Quantum dots in presence of noise

  • Ghosh, Anuja;Bera, Aindrila;Ghosh, Manas
    • Advances in nano research
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    • v.5 no.1
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    • pp.13-25
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    • 2017
  • We examine the total optical dielectric function (TODF) of impurity doped GaAs quantum dot (QD) from the viewpoint of anisotropy, position-dependent effective mass (PDEM) and position dependent dielectric screening function (PDDSF), both in presence and absence of noise. The dopant impurity potential is Gaussian in nature and noise employed is Gaussian white noise that has been applied to the doped system via two different modes; additive and multiplicative. A change from fixed effective mass and fixed dielectric constant to those which depend on the dopant coordinate manifestly affects TODF. Presence of noise and also its mode of application bring about more rich subtlety in the observed TODF profiles. The findings indicate promising scope of harnessing the TODF of doped QD systems through expedient control of site of dopant incorporation and application of noise in desired mode.

A Study on nursing crime (간병범죄에 관한 연구)

  • Lee, cheol-ho
    • Proceedings of the Korea Contents Association Conference
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    • 2015.05a
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    • pp.125-126
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    • 2015
  • According to the provisions of the United Nations, the proportion was 65 years of age or older population is 7% more than in the total population aged society. Due to the rapid decrease fertility and medical technologies and the improvement of living standards, the average life expectancy has emerged as an aging society. In the case of our country, and in 2011 the proportion of the population aged 65 and over 11.4%, the future is even faster aging rate is expected to launch in 2026, the super aged society. The days went by relying on caring for personal piety. Nursing crime is often due to the patriarchal family culture and afford. To care for patients with severe human or plant in the home, not to assume that society. Expanding the scope of long-term care insurance service person and the family burden reduced through measures to apply for health insurance, nursing care can prevent crime.

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