Data Points

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Data Points

February 21, 2023
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Apache Everywhere

February 21, 2023
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Standard For Towers And Antenna Supporting Structures

February 17, 2023
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WAMU American University

 

“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 [email protected] as soon as possible.

Lincoln Memorial University

February 16, 2023
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Back Matter | From the Archives of Lapham’s Quarterly
Valentine’s Day is almost here, but in a letter sent on April Fools’ Day in 1838, Abraham Lincoln—born on this day in 1809—showed himself to be not much of a romantic. He declared that he would never marry “for this reason—I can never be satisfied with anyone who would be blockhead enough to have me.” He married Mary Todd four years later. Mary Owens, who may have been the woman maligned in the letter below, said of her suitor, “I thought Mr. Lincoln was deficient in those little links which make up the chain of woman’s happiness—at least it was so in my case.”
Valentine, c. 1880. The Metropolitan Museum of Art.

1838 | Springfield, IL

Abraham Lincoln Loses the Girl

Without apologizing for being egotistical, I shall make the history of so much of my life as has elapsed since I saw you the subject of this letter. And, by the way, I now discover that in order to give a full and intelligible account of the things I have done and suffered since I saw you, I shall necessarily have to relate some that happened before.

It was, then, in the autumn of 1836 that a married lady of my acquaintance, and who was a great friend of mine, being about to pay a visit to her father and other relatives residing in Kentucky, proposed to me that on her return, she would bring a sister of hers with her, on condition that I would engage to become her brother-in-law with all convenient dispatch. I, of course, accepted the proposal, for you know I could not have done otherwise had I really been averse to it; but privately, between you and me, I was most confoundedly well pleased with the project. I had seen the said sister some three years before, thought her intelligent and agreeable, and saw no good objection to plodding life through hand in hand with her. Time passed on, the lady took her journey, and in due time returned, sister in company, sure enough. This astonished me a little, for it appeared to me that her coming so readily showed that she was a trifle too willing, but on reflection it occurred to me that she might have been prevailed on by her married sister to come, without anything concerning me ever having been mentioned to her, and so I concluded that if no other objection presented itself, I would consent to waive this. All this occurred to me on hearing of her arrival in the neighborhood—for, be it remembered, I had not yet seen her, except about three years previous, as above mentioned. In a few days we had an interview, and although I had seen her before, she did not look as my imagination had pictured her.

 

Valentine

Development of a Multi DOF Haptic Robot for Dentistry and Oral Surgery

February 16, 2023
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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

Kitchen Exhaust

February 16, 2023
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God walks among the pots and pans.

— Saint Teresa of Ávila c.1582

 

One of the concentrated risk aggregations in any school district, college, university and technical school, athletic venues and university-affiliated healthcare systems, rests in the food preparation units.  On a typical large research university there are hundreds of kitchens in dormitories, student unions, athletic venues, hospitals and — to a surprising degree — kitchen facilities are showing up in classroom buildings.  Kitchens that used to be located on the periphery of campus and run by private industry are now moving into instructional spaces and operated by private food service vendors. 

Food preparation facilities present safety challenges that are on the same scale as district energy plants, athletic concession units, media production facilities and hospital operating rooms.   There are 20 accredited standards setting organizations administering leading practice discovery in this space.  Some of them concerned with fire safety; others concerned with energy conservation in kitchens, still others concerned with sanitation.    The International Kitchen Exhaust Cleaning Association is one of the first names in this space and maintains an accessible standards development home page; linked below:

IKCEA Standards

The IKECA catalog of titles establish a standard of care for cleaning activity that fills gaps in related ASHRAE, ASME, ICC and NFPA titles.  For example:

IKECA I10 Standard for the Methodology for Inspection of Commercial Kitchen Exhaust Systems

IKECA C10 Standard for the Methodology for Cleaning Commercial Kitchen Exhaust Systems

Hazards posed by un-maintained exhaust systems are covered in the NFPA Report: Structure Fires in Eating and Drinking Establishments

Princeton University Teaching Kitchen

We encourage subject matter experts in food enterprises in the education industry to communicate directly with John Dixon at IKCEA ([email protected]) or Elizabeth Franks, (215) 320-3876, [email protected]International Kitchen Exhaust Cleaning Association, 100 North 20th Street, Suite 400, Philadelphia, PA 19103.   

We are happy to get specific about how the IKECA suite contributes to lower education community cost during our Food  teleconferences.  See our CALENDAR for the next online meeting; open to everyone.

Issue: [18-24]

Category: Facility Asset Management

Colleagues:  Larry Spielvogel, Richard Robben


LEARN MORE:

Dormitories, Fraternities, Sororities and Barracks

Keele University “Look When You Cook”

Commercial Kitchen Ventilation

Traps, Interceptors and Separators

Workspace / IKCEA

 

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