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Marko Delić,Vesna Mandić,Srbislav Aleksandrović,Dušan Arsić 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.11
FDM technology is among the most widely used additive manufacturing technologies. The most popular materials are ABS and PLA, but lately nylon has been used more often. The aim of the paper is to determine the impact of infill pattern and continuous fiberglass reinforcement on the tensile properties of additively manufactured composite material. The samples were made of Onyx as matrix material on a Markforged Onyx Pro printer, with and without varying fiberglass volume fraction. In addition, five different infill patterns (solid, triangular, rectangular, hexagonal and gyroid) were investigated. The experimental results revealed that infill patterns have different effects on the tensile strength and elastic behavior of the material, but the consumption of material and time should also be considered. The use of continuous fiberglass reinforcement significantly improves the tensile characteristics of the material. Proper arrangement of fibers in multiple layers can give better tensile properties of the material.
Mandi Cai,Yifeng Wu,Rencai Ma,Junlin Chen,Zexing Chen,Chenfu Deng,Xinzhao Huang,Xiangyang Ma,Xiaobao Zou 대한척추신경외과학회 2024 Neurospine Vol.21 No.2
Objective: To compare the clinical outcomes of transoral anterior Jefferson-fracture reduction plate (JeRP) and posterior screw rod (PSR) surgery for unstable atlas fractures via C1-ring osteosynthesis. Methods: From June 2009 to June 2022, 49 consecutive patients with unstable atlas fractures were treated by transoral anterior JeRP fixation (JeRP group) or PSR fixation (PSR group) and followed up at General Hospital of Southern Theatre Command of PLA; 30 males and 19 females were included. The visual analogue scale (VAS) score, Neck Disability Index (NDI), distance to anterior arch fracture (DAAF), distance to posterior arch fracture (DPAF), lateral mass displacement (LMD), Redlund-Johnell value, postoperative complications, and fracture healing rate were retrospectively collected and statistically analyzed. Results: Compared with that in the PSR group, the bleeding volume in the JeRP group was lower, and the length of hospital stay was longer. The VAS scores and NDIs of both groups were significantly improved after surgery. The postoperative DAAF and DPAF were significantly smaller after surgery in both groups. Compared with the significantly shorter DPAF in the PSR group, the JeRP group had a smaller DAAF, shorter LMDs and larger RedlundJohnell value postoperatively and at the final follow-up. The fracture healing rate at 3 months after surgery was significantly greater in the JeRP group (p < 0.05). Conclusion: Both C1-ring osteosynthesis procedures for treating unstable atlas fractures yield satisfactory clinical outcomes. Transoral anterior JeRP fixation is more effective than PSR fixation for holistic fracture reduction and short-term fracture healing, but the hospital stay is longer.
Mandy, Zhang 한국중국학회 2015 中國學報 Vol.72 No.-
孝道是中國一項歷久彌新的法律道德傳統,對現代法律的完善具有重要意義。筆者將探討孝道在中國法律歷史上的變遷和轉型,對傳統禮法社會中的孝道以及近代孝道的徹底轉型進行分析。通過分析孝道的含義以及孝法結合的模式來討論孝道對於古代社會倫理、政治的作用,同時,對近代以來四部重要法律的相關條文進行解讀,以分析孝道在近代法律上衰落的利弊,借此來論證孝道在現代法律上的價値和入法的必要性。同時結合現代立法,對精神贍養入法進行考察,從中國法制史和民法原理的角度來分析論證精神贍養入法的正當性。最後,在此基礎上,分析本土道德和法律的關係,探討當本土道德觀與法律相衝突時,我們應當堅持的原則,並借此爲中國的司法改革提供一些新的思路
Mélodie Mandy 한국부식방식학회 2024 Corrosion Science and Technology Vol.23 No.2
In the automotive industry, the hole expanding test is widely used to assess the formability of punched holes in sheets. This test provides a good representation of formability within the framework defined by the ISO 16630 standard. During hole expanding tests on galvanized high strength steels, a negative effect was observed when there was a delay between hole punching and expansion, as compared to performing both operations directly. This effect is believed to be caused by hydrogen aging, which occurs when hydrogen diffuses towards highly-work hardened edges. Therefore, the aim of this study is to demonstrate the migration of hydrogen towards work-hardened edges in high strength Zn-coated steel sheets using a novel Thermal Desorption Analyzer (TDA) designed for small samples. This newly-developed TDA setup allows for the quantification of local diffusible hydrogen near cut edges. With its induction heating and ability to analyze Zn-coated samples while reducing artifacts, this setup offers flexible heat cycles. Through this method, a hydrogen gradient is observed over short distances in shear-cut galvanized steel sheets after a certain period of time following punching.
Examining Online to Offline Service Using Augmented Reality
Timothy Jung,Mandy C. Leue,Hyunae Lee,Namho Chung 한국호텔외식관광경영학회 2015 한국호텔외식경영학회 학술발표논문집 Vol.- No.-
The ways providers communicate with their customers have been changed due to Online to Offline (O2O) service. In O2O service, providers are able to find consumers in virtual environment (online) and bring them into real world stores (offline). In this situation, this study regarded Augmented Reality (AR) as an effective tool of O2O service, since AR has a feature of providing virtual 3D images or information that superimposed on the real-world view, which can ultimately enhance customer"s experience. For instance, by using wearable computer such as Google Glass, people can receive virtual information on top of the real world view such as cultural heritage sites, artifacts, masterpieces and so on. Therefore, this study considered AR as an effective way to provide customers with better experience and cause customers" intention to visit destination. To be more specific, drawn from Theory of Planned Behavior (TPB), we investigated the causal mechanism underlying customer"s beliefs about AR (usability, enjoyment and aesthetics), AR evaluation and attitudes toward AR, and the impact of attitudes toward AR, time resource, subjective norm on intention to use AR and intention to visit Art Gallery. While the results showed that time resource have an influence on only intention to use AR, and attitude toward AR have an impact on only intention to visit Art Gallery, subjective norm was found to be predictor of both intentions. Intention to use AR was found to influence intention to visit Art Gallery. These results are supporting our augments that AR can be an effective tool in O2O service. With these results, we provide theoretical and practical implications.