In the present worksheet is shown a procedure to obtain the relations for the sides and angles of a hyperbolic polygon, no matter its number of sides. The study consists of two parts, the first for polygons in general and the second for right-angled polygons in particular. The results can be applied, for instance, to the construction of hyperbolic polygons. For that, the required number of data is 2p-3, p being the number of the sides of the polygon.

The Biden administration has approved a new $425 million weapons aid package for Ukraine, which includes providing Kyiv with additional munitions, counter-drone equipment and Stryker vehicles.  The new security assistance […]

The Navy plans to extend the operations of 12 Flight 1 Arleigh Burke-class (DDG-51) destroyers and three Ticonderoga-class cruisers past their planned service lives to boost fleet numbers, the service […]

Boeing’s [BA] machinists’ union members on Monday voted to end their 53-day strike that shut down production at the company’s commercial aircraft plants in the Pacific Northwest but the company […]

Palantir Technologies [PLTR] on Monday reported surging sales in its third quarter that included strong revenue from Defense Department contracts and the U.S. government overall. Sales to the DoD were […]

The Marine Corps has awarded Norway’s Kongsberg Defence & Aerospace a contract worth up to $329 million to build medium caliber remotely-operated weapon systems for the turreted variant of the […]

The Navy on Wednesday announced it and Northrop Grumman [NOC] completed the Preliminary Design Review (PDR) on the newest set of improvements to the E-2D Advanced Hawkeye, the Delta System […]

LTP (Language Teaching Professionals). January 26 (Sun), 9:00-18:00 in Nagoya, Aichi. A wide variety of speakers. Deadline for presenter applications: November 30, 2024..

NanKyu JALT (NanKyu Chapter of the Japan Association for Language Teaching). January 25 (Sat), 9:00-18:00 in Kumamoto. Edward Rubesch.

LTP (Language Teaching Professionals). January 12 (Sun), 9:00-18:00 in Osaka. A wide variety of speakers. Deadline for presenter applications: November 30, 2024. .

National U of Singapore CLS (National University of Singapore Centre for Language Studies). December 7 (Sat), 9:00-19:00 in Singapore. Andy Kirkpatrick (Grifflth University, Australia), Dorothy M Chun (UC, Santa Barbara, USA), Sarah Mercer (University of Graz, Austria), Xiaoshi Li (Michigan State U, USA). Call for presentations closes April 30.

National U of Singapore CLS (National University of Singapore Centre for Language Studies). December 6 (Fri), 9:00-19:00 in Singapore. Andy Kirkpatrick (Grifflth University, Australia), Dorothy M Chun (UC, Santa Barbara, USA), Sarah Mercer (University of Graz, Austria), Xiaoshi Li (Michigan State U, USA). Call for presentations closes April 30.

National U of Singapore CLS (National University of Singapore Centre for Language Studies). December 5 (Thu), 9:00-19:00 in Singapore. Andy Kirkpatrick (Grifflth University, Australia), Dorothy M Chun (UC, Santa Barbara, USA), Sarah Mercer (University of Graz, Austria), Xiaoshi Li (Michigan State U, USA). Call for presentations closes April 30.

Nara JALT (Nara Chapter of the Japan Association for Language Teaching). December 1 (Sun), 9:00-17:00 in Nara. Ben Tanaka, Erin Noxon, David Eckford, Olga Li and Akiko Mokhtari, Eric Martin.

Nanzan University (Nanzan University Language Education Seminar). November 23 (Sat), 9:00-17:00 in Nagoya, Aichi. Submissions accepted until Sept 30.

JALT (The Annual International Conference of the Japan Association for Language Teaching). November 18 (Mon), 9:00-16:00 in Shizuoka. Call for proposals ends March 10th, 2024.

JALT (The Annual International Conference of the Japan Association for Language Teaching). November 17 (Sun), 9:00-19:00 in Shizuoka. Call for proposals ends March 10th, 2024.

JALT (The Annual International Conference of the Japan Association for Language Teaching). November 16 (Sat), 9:00-19:00 in Shizuoka. Call for proposals ends March 10th, 2024.

JALT (The Annual International Conference of the Japan Association for Language Teaching). November 15 (Fri), 13:30-19:00 in Shizuoka. Call for proposals ends March 10th, 2024.

ELT Calendar is the source for information on workshops, seminars and conferences for language teachers in every part of Japan. There are 27 upcoming events currently listed on the calendar.

PanSIG JALT (JALT PanSIG Conference). May 16 (Fri) - 18 (Sun) 2025, at Kanda University of International Studies in Mihama Ward, Chiba City, Chiba Prefecture.

ACIE (Asian Conference for Innovation in Education). March 3 (Mon) - 4 (Tue) 2025, at Osaka Central Public Hall, Osaka.

NanKyu JALT (NanKyu Chapter of the Japan Association for Language Teaching). January 25 (Sat) 2025, at SILC Building, Sojo University, Kumamoto.

National U of Singapore CLS (National University of Singapore Centre for Language Studies). December 5 (Thu) - 7 (Sat) 2024, at National University of Singapore.

JALT (The Annual International Conference of the Japan Association for Language Teaching). November 15 (Fri) - 18 (Mon) 2024, at Shizuoka Convention and Arts Center (Granship) Shizuoka City.

The 12th in our series is on the Branches of the Internal Iliac Artery.
See our website for accompanying diagrams

Bacharach Inc., a manufacturer of refrigerant gas detection and combustion analyzers, is implementing an enhanced 24 hour priority calibration and repair service option out of their New Kensington, Pennsylvania, location to build upon the company’s current service support capabilities.

The winners — one residential, one commercial — will be recognized at the ACCA 2019 Annual Conference and Trade Show in San Antonio, Texas.

GreenChill Partners in the food retail industry commit to reduce refrigerant emissions and decrease their impact on the environment.

Trane has been named Green Builder Media’s prestigious HVAC Brand Leader for 2022 and was recognized for its sustainable solutions and focus on efficient indoor comfort.

The U.S. Green Building Council (USGBC) released its annual ranking of U.S. states leading the way on green building, with Massachusetts topping the list.

Greenbuild 2023 will celebrate the U.S. Green Building Council’s 30th anniversary and newest version of LEED.

Danfoss North America recently signed a power purchase agreement with CIG Capital, a U.S.-based project financing firm, to purchase about 75 MW of solar power from a solar farm in Texas, starting in 2025.

The Associated Air Balance Council (AABC) installed new officers and directors for 2024-2026 during its Annual Meeting in Lost Pines, Texas.

ThermalWorks, Cloward H2O, and Jetson by Modine took top honors in the annual competition recognizing companies that use Danfoss products or solutions to realize significant energy or environmental savings.

The AHR Expo (International Air-Conditioning, Heating, Refrigerating Exposition) released the full schedule for the 2025 AHR Expo Education Program. 

The Bosch Greensource CDi geothermal heat pump comes equipped with innovative technology that only Bosch can provide including: 10 year limited warranty on parts and labor; fiber-free, closed-cell insulation to help keep the system’s high efficiency and improve IAQ; and more.

As a heating and air conditioning company owner; where do I get leads from today? Where do I put my money today?

Hassler Heating and Air Conditioning Inc. of El Cerrito, California, was named the 2015 Home Upgrade Program Contractor of the Year by PG&E and Energy Upgrade California.

Air-Tro Inc., a heating and air conditioning contractor in Monrovia, California, announced that the company has won the 2016 Readers Choice Award for San Gabriel Valley. This is the third year in a row that the company has won the award.

The family business ties its roots back to the early mining days in Virginia City and has been passed down through five generations of leaders. During the anniversary event, Savage and Son gifted a check donation to the Fourth Ward School Museum in Virginia City.

The Hydraulic Institute's new on-demand courses are designed to support the pump and fluid-handling industry with workforce development and onboarding resources.

The proper design, installation, and maintenance of these valves is vital for the safe operation of R-744 refrigeration systems, especially in industrial and commercial applications.

The new complex will replace the oldest buildings on campus, which were built in the 1960s and early 1970s.

Pure Air Control Services recently completed an IAQ project that helped fans and hockey players at the Stanley Cup Playoffs breathe easy at Tampa Bay’s Amalie Arena.

Just 3% of commercial contractors were pessimistic about the upcoming year in 2024, compared to 22% in 2023.

At a national gathering of energy efficiency leaders, Midea introduced its newest heat pump technologies and took part in important discussions on accelerating the adoption of sustainable HVAC solutions across the U.S.

Office workers across five markets have increased expectations when it comes to their building’s IAQ and carbon footprint and reported the responsibility falls directly on their employer or building manager.

Indoor airPLUS is a voluntary EPA partnership and labeling program that helps the builders of new homes improve the quality of indoor air and meet the growing consumer preference for homes with improved IAQ. 

The Verified Market Research Report shows that the heat pump market is valued at $74.73 billion in 2024 and is expected to reach $167.32 billion by 2031.