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“Arlington, VA (May 02, 2022) – The Telecommunications Industry Association—the trusted industry association for the connected world—announced that its TR-14 Committee, which oversees TIA’s standards for towers and antenna supporting structures, has begun the process of updating the TIA-222-H standard since it’s last full revision in 2017. TIA invites all industry stakeholders to get involved and submit input for the update of TIA-222-H to TIA-222-I. From the project prospectus:
This Standard provides the requirements for the structural design and fabrication of new and the modification of existing antenna supporting structures, antennas, small wind turbine supporting structures, appurtenance mounting systems, structural components, guy assemblies, insulators and foundations.
This Standard is based on limit states design. It is applicable mainly to steel structures but may also be applied to other materials, when required, so as to provide an equivalent level of reliability.
The appropriate standards should be referenced for structures that support antennas but that are primarily intended for other applications, such as water towers, electrical transmission and distribution structures, sign support structures, lighting support structures, buildings, bridges, etc. This Standard, however, does apply to the calculation of effective projected areas of appurtenances (antennas, mounts, lines, etc.) and to the serviceability limit states appropriate for structures that support antennas.
Appropriate analysis and design criteria for other structural materials are outlined in Section 6.0 of the Standard. When a structure with a lower reliability is utilized as part of a communication system, the structure may require modification in order to meet the reliability requirements of this Standard. When the primary use of the structure is other than for communications, a higher reliability may be required in accordance with the applicable standard governing the primary use of the structure.
Structural requirements during construction and construction means and methods provisions are not within the scope of this Standard. For construction related loading, analysis, and design requirements during construction, installation, alteration, and maintenance, refer to the ANSI/TIA-322 Standard, “Loading, Analysis, and Design Criteria Related to the Installation, Alteration and Maintenance of Communication Structures”. For applicable construction means and methods provisions, refer to the ANSI/ASSE A10.48 Standard, “Criteria for Safety Practices with the Construction, Demolition, Modification and Maintenance of Communication Structures”.
TIA invites all industry stakeholders who are interested in participating in the revision of TIA-222 to contact TIA at standards@tiaonline.org as soon as possible.
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Development of a Multi DOF Haptic Robot for Dentistry and Oral Surgery
Taiga Iijima – Tomoyuki Shimono | Yokohama National University
Takuya Matsunaga – Kouhei Ohnishi – Hiromasa Kawana | Kanagawa Institute of Industrial Science and Technology
Shin Usuda | Keio University
Abstract: There exist many dental surgery such as orthognathic surgery and an implant operation. Jaw deformity is one of the dental diseases such as an abnormality of occlusion and facial distortion in the shape. To treat jaw deformity, the osteotomy is carried out by human hands. However, drilling a jawbone accurately by oral surgeons is difficult. Recently, surgical robots are attracting attention in the medical field. The researches of surgery supporting systems have been carried out. They have possibilities to avoid unexpected accidents in the surgery, a hands shake and so on. The improvement of the minimally invasive surgery can be expected, thanks to robotic technology. The purpose of this research is the design and development of master-slave dentistry and oral surgery assisting robot. By implementing acceleration based bilateral control, haptic information can be communicated. Moreover, the proposed robot has the serial-parallel hybrid mechanism that can obtain the advantages of a serial mechanism and a parallel mechanism. In this paper, the mechanism of the proposed robot is explained and the performance of the proposed robot is validated by experiments.
CLICK HERE for complete paper
New update alert! The 2022 update to the Trademark Assignment Dataset is now available online. Find 1.29 million trademark assignments, involving 2.28 million unique trademark properties issued by the USPTO between March 1952 and January 2023: https://t.co/njrDAbSpwB pic.twitter.com/GkAXrHoQ9T
— USPTO (@uspto) July 13, 2023
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