In cosmetic surgery, golden threads have been used in thread lift procedures, wherein golden threads are placed under the skin of the neck and chin. These are mainly applied in the maxillofacial region adjacent to the...In cosmetic surgery, golden threads have been used in thread lift procedures, wherein golden threads are placed under the skin of the neck and chin. These are mainly applied in the maxillofacial region adjacent to the sites of dental treatment to achieve cosmetic benefits. However, as dentists typically lack sufficient knowledge about the golden thread lift procedure, it may present a challenge to dental examinations and treatments. It is therefore crucial for dentists to have a comprehensive understanding of the procedure. This case report covers our experience with the dental examination of a patient with golden threads. We emphasize the dental complications and precautions that should be taken for such cases. These golden threads are made of pure gold, nonabsorbable, and can be broken. These can obstruct dental examination, as well as cause metal allergies and foreign body granulomas. Additionally, it is difficult to completely remove these threads when they break apart. In the future, since more patients are expected to undergo this procedure, it is possible to encounter these golden threads as artifacts on imaging. Therefore, it is important to educate dentists about the golden thread lift procedure and its dental implications. It is also imperative to determine whether the patient has undergone the golden thread lift procedure in the medical questionnaire prior to the magnetic resonance imaging examination. Thus, dentists should be able to conduct a detailed interview with the patient, determine the feasibility of examination or treatment, and communicate this assessment to the patient.展开更多
We are developing a speed reducer that can be considered a transformation of a worm gear reducer: the worm is replaced by an inverted roller screw, and the gear is replaced by a threaded chain drive. This configuratio...We are developing a speed reducer that can be considered a transformation of a worm gear reducer: the worm is replaced by an inverted roller screw, and the gear is replaced by a threaded chain drive. This configuration lessens wear, increases load capacity, and improves efficiency. The threaded chain consists of nut-shaped links. This paper presents the results of tests carried out on a prototype with a reduction ratio of 46.展开更多
针对基于Linux和TCG软件栈(Trusted computing group Software Stack,TSS)的复杂性问题,提出一种轻量级的可信软件栈。分析了TSS的基本结构与TSS在嵌入式系统的局限,总结出基于嵌入式系统的可信软件栈设计需求,设计出软件栈命令调用的...针对基于Linux和TCG软件栈(Trusted computing group Software Stack,TSS)的复杂性问题,提出一种轻量级的可信软件栈。分析了TSS的基本结构与TSS在嵌入式系统的局限,总结出基于嵌入式系统的可信软件栈设计需求,设计出软件栈命令调用的机制和软件栈的结构。此外,分析了TSS密钥管理缓存算法,在flash中定义一块密钥槽空间,方便密钥管理中直接访问,阐述密钥生成的逻辑过程,实现面向嵌入式系统的可信软件系统。经实验验证,该软件栈可以结合RT-Thread实时系统实现基本的可信计算功能。展开更多
文摘In cosmetic surgery, golden threads have been used in thread lift procedures, wherein golden threads are placed under the skin of the neck and chin. These are mainly applied in the maxillofacial region adjacent to the sites of dental treatment to achieve cosmetic benefits. However, as dentists typically lack sufficient knowledge about the golden thread lift procedure, it may present a challenge to dental examinations and treatments. It is therefore crucial for dentists to have a comprehensive understanding of the procedure. This case report covers our experience with the dental examination of a patient with golden threads. We emphasize the dental complications and precautions that should be taken for such cases. These golden threads are made of pure gold, nonabsorbable, and can be broken. These can obstruct dental examination, as well as cause metal allergies and foreign body granulomas. Additionally, it is difficult to completely remove these threads when they break apart. In the future, since more patients are expected to undergo this procedure, it is possible to encounter these golden threads as artifacts on imaging. Therefore, it is important to educate dentists about the golden thread lift procedure and its dental implications. It is also imperative to determine whether the patient has undergone the golden thread lift procedure in the medical questionnaire prior to the magnetic resonance imaging examination. Thus, dentists should be able to conduct a detailed interview with the patient, determine the feasibility of examination or treatment, and communicate this assessment to the patient.
文摘We are developing a speed reducer that can be considered a transformation of a worm gear reducer: the worm is replaced by an inverted roller screw, and the gear is replaced by a threaded chain drive. This configuration lessens wear, increases load capacity, and improves efficiency. The threaded chain consists of nut-shaped links. This paper presents the results of tests carried out on a prototype with a reduction ratio of 46.
文摘针对基于Linux和TCG软件栈(Trusted computing group Software Stack,TSS)的复杂性问题,提出一种轻量级的可信软件栈。分析了TSS的基本结构与TSS在嵌入式系统的局限,总结出基于嵌入式系统的可信软件栈设计需求,设计出软件栈命令调用的机制和软件栈的结构。此外,分析了TSS密钥管理缓存算法,在flash中定义一块密钥槽空间,方便密钥管理中直接访问,阐述密钥生成的逻辑过程,实现面向嵌入式系统的可信软件系统。经实验验证,该软件栈可以结合RT-Thread实时系统实现基本的可信计算功能。
