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윤승조 한국교통대학교 2016 한국교통대학교 논문집 Vol.51 No.-
A structural timber receives a lot of attention because the demand for green timber houses are growing in Korea. However, the structural timber completely depends on foreign trades and it would be a big disadvantage although it is an outstanding material for construction in that it has good ductility and excellent fire resistance. This study propose Near surface mounted Re-bar into the glued laminated timber for reducing consumption of timbers. Even though the laminated timber is able to conserve wood resources as remnants will be recycled using lamination process after woodworking, there is a difficulty to investigate mechanical properties. This study indicates about bond properties between re-bar and the laminated timber in order to verify basic performance for uniform stiffness by embedding re-bar into renewable collection trees. In addition, 12 models were manufactured to figure out bond strengths between re-bar and the laminated timber affected by failure mode, shape of gutters, bond lengths and diameter of re-bar and then, compared with existing proposed equations. As a result of the study, the bond strength of the serrated model increased by 59 ∼ 62 %. From this result, The process that is embedded with serrated shape in re-bar improve the ability of bond strength between laminated timber and adhesive Also, re-bar strain was getting higher when bond strength became higher so the adhesive used near surface mounted might have a strong influence on the experiment.
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Assessing Indonesian Ship’s Master Stresses When Navigating the Ship into Harbor Using HRV
Joe Ronald Kurniawan Bokau(Joe Ronald Kurniawan Bokau),Young Soo Park(Young Soo Park),Daewon Kim(Daewon Kim) 한국항해항만학회 2024 한국항해항만학회 학술대회논문집 Vol.2024 No.11
The human factor issue as the causal factor in marine accident in Indonesia were still high with collision still become one of the highest type of marine accident that occurred in Indonesian waters. Alas, as the 3rdlargest in officer population in the world, Indonesian seafarers faced a challenge to meet the world’s demand in terms of the quality of the education of the seafarer itself with the performance onboard. This research will focus in how Master of a ship handle the stress when navigating through confined waters when entering ports by mimicking the result of real AIS data analysis that have been further analysewith potential risk of collision when ship’s encounter into each other in Makassar Port Indonesia that we divide in 6 segments of scenario. The monitoring of stress using HRV (Heart Rate Variability) monitor during simulation to get Autonomic Nervous System (ANS) index that consists of PNS (Parasympathetic Nervous System) and SNS (Sympathetic Nervous System). The result from the 24 participants shows significant stress during each segment while from statistical approach, there were no statistically significant differences in PNS or SNS indexes based on age or experience. This study found that neither age nor experience significantly impacted autonomic nervous system responses in the context of moderate stress scenarios. Autonomic responses, as measured by PNS and SNS indices, remained stable across all segments and were strongly correlated within the respective systems. These findings suggest that, under the given conditions, age and experience are not critical determinants of physiological stress responses.
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Clinical anatomy of the maxillary sinus: application to sinus floor augmentation
Joe Iwanaga,Joe Iwanaga,Charlotte Wilson,Stefan Lachkar,Krzysztof A. Tomaszewski,Jerzy A. Walocha,R. Shane Tubbs 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.1
The anatomy of the maxillary sinus, especially its vascular anatomy, and its relationships with the teeth and alveolar processes have been well documented. The development of cone-beam computed tomography has resulted in dentists being more familiar with maxillary sinus floor augmentation procedures. This paper aims to revisit the classic anatomy of the maxillary sinus and review the newly published literature in order to help dentists diagnose in more detail and perform safer surgery of the maxillary sinus.
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Stafne bone cavity: a rare cadaveric case report
Joe Iwanaga,Joe Iwanaga,T. L. Wong,Shogo Kikuta,R. Shane Tubbs 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.3
The Stafne bone cavity (SBC), also called the static bone cavity, salivary inclusion cyst, latent cyst, and lingual bone defect is an asymptomatic bony defect that is commonly located inferior to the mandibular canal and slightly above the inferior border of the mandible. It is rare to see the actual bony defect in the cadaver because of its relatively low incidence of 0.1% to 6.06%. We report a unilateral SBC found in a 76-year-old at death male Caucasian cadaver and involving the right mandible. The SBC was oval in shape with a smooth surface and measured 10.8×6.0 mm. The SBC was continuous with the right mylohyoid groove. Since actual photographs of the SBC are lacking in the literature, this report might provide additional insight for better understanding the SBC.
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