While institutional matters such as improvement on Basic Guidelines for Construction Safety are greatly concerned to reduce falling accidents at construction sites, there are short of studies on how to practically predict accident signs at construction sites and to preemptively prevent them. As one of existing accident prevention methods, it was attempted to build the early warning system based on standardized accident scenarios to control the situations. However, the investment cost was too high depending on the site situation, and it did not help construction workers directly since it was developed to mainly provide support operational work support to safety managers. In the long run, it would be possible to develop the augmented reality based accident prevention method from the worker perspective by extracting product information from BIM, visually rendering it along with site installation materials term and comparing it with the site situation. However, to make this method effective, the BIM model should be implemented first and the technology that can promptly process site situations should be introduced. Accordingly, it is necessary to identify risk signs through lightweight image processing to promptly respond only with currently available resources. In this study, it was intended to propose the system concept that identified potential risk factors of falling accidents by histogram equalization, which was known as the fastest image processing method presently, used visual words, which could enhance model classification by wording image records, to determine the risk factors and notified them to the work manager.
The ultimate goal of construction is to complete the given work in the most economical and safest way within the required construction period while meeting the quality standards specified in the design drawing. There are a few characteristics of finish work. First, executed in subdivided processes, finish work involves a very diverse and complex structure. Second, there are no criteria for each segmented process with regard to the appropriate time of input. Third, it is not very necessary to set priorities for lead and lag works. This study intends to provide information on the completion of a project in accordance with the required duration by setting priorities in the delay of each detailed process of finish work to minimize delay in finish work. In this study, finish work is divided into wet work and other types of finish work, and the importance of each process is classified based on the given details of each process. In addition, the study employs a survey to analyze delay factors of a designer, a constructor, and a supplier. Using the survey results, the study sets priorities in delay of final work to provide information on the completion of an apartment project within the planned construction period.
Fast-tracking was developed as an optimizing method to shorten the duration of construction project in 1960's, and it introduced to Korea in 1999. Since then, many Korean companies have been used fast-tracking for getting economical benefit from shorten duration. However, there were some problems(dispute, delay and cost overrun) because of using inappropriate subcontractor management system. For this reason, previous studies suggested some management models to solve these problems. Unfortunately, however, the models have been had some doubts about reliability, objectivity and possibility of using them on real construction site. Therefore, this study suggests 3 steps of strategic subcontracting method and apply it on real fast-tracking practice(L company) to secure reliability and objectivity. Through this, the method is expected to make up the doubts of previous studies.
The relationship between weight and hearing loss is unclear. But childhood obesity, defined as body mass index (BMI) ≥ 95%, is a significant health problem associated with a variety of disorders, and in adults it has been found to be a risk factor for hearing loss. Thus in this study, analyzed the relationship between hearing loss and BMI in a 20s young adults. Methods: A total of 49 participants, including 27 females and 20 males aged 21-25 participated in this study. Subjects were divided into three groups according to BMI (underweight, normal, overweight). In all subjects, pure-tone and speech audiometry, acoustic immittance and otoacoustic emission [OAE; spontaneous otoacoustic emission (SOAE), transient evoked otoacoustic emission (TEOAE), distortion product otoacoustic emission (DPOAE)], auditory brainstem response (ABR) were evaluated. Results: The mean of hearing threshold in underweight group were significantly higher than normal group. Regarding the hearing threshold, the low frequency pure tone average threshold was significantly higher in underweight and overweight group. The incidences of SOAEs were 66.7% in normal group, 37.4% in underweight group and 11.1% in overweight group. Between BMI and OAE overweight group had significantly lower TEOAE amplitude. Amplitude of DPOAEs differed significantly among normal, underweight and overweigh BMI group at frequency of 4,000 Hz. Conclusion: We demonstrate for the first time that underweight and overweight in adult in their 20s is associated with higher hearing thresholds in low-frequency. And parameters of OAE, such as amplitude of TEOAE, DPOAE at 4,000 Hz was considered as good indicators for monitoring cochlear function of underweight and overweight BMI group.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.