Through ventilation, greenhouses must remove heat that is not used for transpiration and evaporation.

Through ventilation, greenhouses must remove heat that is not used for transpiration and evaporation. On a bright, sunny summer day, a 30 x 100-foot greenhouse will gather about 32 million Btu’s of heat. This is equivalent to burning 32 gallons of fuel oil or 320 therms of natural gas. If the greenhouse is full of plants, about half of this heat is used for transpiration and evaporation. The remainder of the heat must be removed through ventilation. Shade on the outside will keep some of the heat out. Shade on the inside, if it contains aluminum foil, will reflect some of the heat back out. Ventilation, either natural or fan, will remove a considerable amount of heat that is collected. Still, on summer days, the temperature may exceed the desired level that promotes good plant growth. Excessive temperature results in delayed flowering and internode stretching. Evaporative cooling may be the best choice under these conditions. Evaporative cooling is a simple system that uses the heat in the air to evaporate water from leaves and other wetted surfaces. It can cool the greenhouse to 10-20° F below the outside temperature. It takes 1 Btu of heat to raise the temperature of 1 pound o...

Healthcare: Market update: New facilities expand healthcare opportunities and access for veterans

With the strongest and fastest growth of any segment, the healthcare market is more critical than ever to flooring manufacturers. Results from Floor Focus’ designer survey in this issue show that 18% of top projects among surveyed architects and designers (A&D) are medical/acute care, up nearly two-thirds from two years ago, and senior living top projects have more than doubled in just the last year. Also, designers report that the medical/acute care market is the fastest-growing commercial segment, up 38% over last year’s survey. Contributing to the growth of the healthcare market is the Department of Veterans Affairs’ (VA) vigorous pace of updating and developing new VA outpatient clinics that will give veterans better access to high quality care. Four new VA outpatient clinics in Chattanooga, Tennessee; San Antonio and Lubbock, Texas; and Phoenix, Arizona have broken ground this summer, with materials currently being bid. Developed by U.S. Federal Properties (USFP), the new clinics total 733,563 square feet and are designed to serve a population of 225,000 veterans. USFP develops, finances, owns and operates the facilities, which are leased to the government. Its long-ter...

U.S. RFID Tags Market to grow at a CAGR of 8.5% during the Forecast period 2019-2027, Says CMI

SEATTLE, April 08, 2020 (GLOBE NEWSWIRE) — Radiofrequency identification (RFID) refers to a technology where digital data is encoded in RFID tags and captured by a reader through radio waves. RFID is somewhat similar to barcodes although it has many advantages over the barcode. Unlike a barcode, an RFID tag can be read outside the line-of-sight. RFID finds applications in various end-use verticals such as inventory, asset tracking, ID badging, controlled access, supply chain management, personnel tracking, counterfeit prevention, transportation at toll booths, and more. The U.S. RFID Tags market is estimated to account for US$ 368.7 Mn in 2019 and is expected to grow at a CAGR of 8.5 % over the forecasted period 2019-2027. Increase in number of accidents is the motivating factor underlying the numerous commercial, governmental, and academic engagements for technology adaptation in vehicles, namely, Intelligent Transportation System (ITS) using RFID technology, thus attributing to the expansion of the RFID tag market in this sector. RFID-based technologies are extensively implemented to improve security and safety, thus increasing the efficiency of the transportation system...

Form 10-K BERKSHIRE HATHAWAY INC For: Dec 31

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ☑    No  ☐ Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ☐    No  ☑ Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☑    No  ☐ Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☑    No  ☐ Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in defi...

Xiaomi shows off powerful 40W wireless charging, charging a phone to full in as little as 40 minutes

Xiaomi simply teased a fairly highly effective 40W wi-fi fast-charging system, which topped-up a cellphone from empty to full in a mere 40 minutes in an indication video. This may not be as loopy as Vivo’s just lately revealed 60W wi-fi charging, nevertheless it’s nonetheless various energy to be transmitted with out a cable. In accordance with the accompanying particulars from the video and Weibo, 20 minutes will see a cost of 57%, and 40 minutes will absolutely cost a four,000mAh battery. For comparability, Huawei’s latest units can approach 27W, Samsung’s wi-fi charging tops out round 15W, iPhones pull a mere 7.5W, and most simple Qi charging options solely do 5W. 40W is a lot extra energy to be screaming via the air. For a lot of, the primary concern with an answer like this might be warmth: Wi-fi charging tends to generate warmth, the coils are often stacked on prime of the battery (components that do not like warmth), and extra energy can imply extra warmth. Nevertheless, the main points on Weibo declare that temperature should not be an issue. Tech specialist. Social media guru. Evil problem solver. Total writer. Web enthusiast. Internet nerd. Passionate gamer. Twitter bu...

Fiber laser technology making inroads into tube, pipe market The FABRICATOR STAMPING Journal The Welder The Tube and Pipe Journal The FABRICATOR en Español The Additive Report The FABRICATOR The Welder The Tube and Pipe Journal STAMPING Journal The Additive Report

With very high beam quality and a variety of focusing optics, fiber laser technology provides a narrow, low-heat-input weld that results in a nail-like cross section, providing optimal strength, ductility, and formability. Fiber laser welding is well-suited to modern materials such as the very-high-strength steels that are growing in prominence in the automotive industry. For every new technological innovation, another follows. Some technologies emerge and carve out a niche for themselves, dividing the market; others displace the preceding technology, rendering it obsolete, and take over the market. Among electrical and electronics products, a new type of technology often supplants an old one. The incandescent light bulb is essentially a thing of the past, replaced by compact fluorescent, halogen, and light-emitting diode varieties. Vinyl records, cassette tapes, and compact discs have been nearly replaced by electronic files. Film cameras are favored among some diehards, but the market essentially has been taken over by digital cameras. A half century ago, radios and amplifiers based on vacuum tubes were pushed out by solid-state units, modern products based on semiconductors. ...

Why you should make your own face mask during coronavirus—and how to do it

During the early days of the coronavirus pandemic, the U.S. Centers for Disease Control and Prevention and World Health Organization made it clear that, unless you’re sick or are a medical professional, you do not need to wear a face mask. On February 29th, U.S. Surgeon General Jerome Adams tweeted: ”Seriously people- STOP BUYING MASKS! They are NOT effective in preventing general public from catching #Coronavirus, but if healthcare providers can’t get them to care for sick patients, it puts them and our communities at risk!” Adams’ message comes with good intentions. With COVID-19 cases soaring, doctors, nurses and other frontline health-care workers confront a severe shortage of masks — and cautioning people against buying them can help offset the problem.  But other countries have already taken aggressive measures to prevent the spread of COVID-19 by telling citizens to wear masks, even if the masks are homemade. Last week, George Gao, director-general of the Chinese Center for Disease Control and Prevention, told ScienceMag.com that the “big mistake in the U.S.” is that people aren’t wearing masks. “This virus is transmi...

Global $2+ Billion Electronic Shelf Label (ESL) Market Forecast, 2025

DUBLIN, April 6, 2020 /PRNewswire/ — The “Electronic Shelf Label (ESL) Market: Global Industry Trends, Share, Size, Growth, Opportunity and Forecast 2020-2025″ report has been added to ResearchAndMarkets.com’s offering. The global electronic shelf label market grew at a CAGR of around 21% during 2014-2019. Looking forward, the market is projected to reach a value of US$ 2,082.7 Million by 2025, registering a CAGR of 24.6% during 2020-2025.In recent times, the high prevalence of technological revolution across the retail industry of both the developed and developing regions have augmented the demand for ESL systems. Furthermore, the developing economies, such as China and India, have emerged as substantial markets for retail automation. Several retailers are adopting retail automation solutions for improved consumer satisfaction, automatic price updates, reduced operational and labor costs, and efficient store management.In addition to this, the rapid integration of full graphic e-papers with ESL systems has positively influenced the development of in-store communication solutions. Moreover, various technological advancements, for instance, the introductio...