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The article offers information on the importance of the relative humidity on the human body. Topics discussed include impact of the low the ambient humidity on the dehydration of respiratory tract and skin; decreased synthesize of protective interferon proteins due to dryness; and development of micro-cracks in outermost epidermal layer due to dry air, resulting in penetration of foreign particles and microbes and subsequent inflammation.

The article presents a study conducted by Elia Sterling of the University of Vancouver in British Columbia on indoor relative humidity. It mentions that the study examines the impact of indoor relative humidity on the occupants of an indoor space. The study established that both low and high relative humidity levels had costly and deleterious impact on the productivity and health of the facility as related to fungi, viruses and bacteria in home, schools and workplace.

The article focuses on living in the Southeastern U.S. and working for an HVAC and controls service provider, some cases of humidity issues that need investigating and trend analysis can be an excellent tool. Topics include the warranty call for a computer room air conditioner (CRAC) unit in a server room for a flight simulator suite, and the owner required 72°F +/-2° and 50% RH +/-2%, and we were at 70° and 53% RH.

The article presents the author's views on the use of building materials to manage indoor air quality (IAQ). Topics include the importance of balancing relative humidity for building occupants' health, how the lack of universally applied strategies can cause diseases due to dry building syndrome, and the availability of low energy and hygienic adiabatic humidification systems.

This article focuses on a measure of relative humidity with a PIC MCU. A relative humidity meter can be built using a sensor with a capacitive response and a PlC microcontroller as shown in the figure. The capacitance range of the sensor, the HS11O1 from Humirel varies from 162 to 202 pF. Functioning as an oscillator, a TLC555 CMOS timer performs the conversion from capacitance to frequency. The MCU measures the period of the input signal and converts it to a digital relative-humidity reading. This is achieved by using the MCU's internal counter (TMR1) and the capture/compare/pulse-width modulation module. Because the transducer's capacitance range is too narrow, the period range of the signal will be too small. Therefore, an 8.000-MHz crystal is used to get 0.5 less per instruction in the MCU. In addition, the CCP module is configured to divide the input signal by four. This will increase the counting pulses' range within the different periods provided by the TLC555. The full code listing, relative humidity meter code doc, is available in the online version of this article, ED Online 9808, at w.elecdesign.com.

The article reports on the need for balanced indoor air hydration for maintaining health by keeping away disease causing viral strains like that of virulent H3N2 strain of influenza A. Topics discussed include information provided by the U.S. Center for Disease Control regarding difficulties in the vaccination of H3N2 virus; recommendation for increasing indoor humidity levels for reducing the risk of influenza infection; and association between dry indoor air and viral respiratory disease.

Reports the generation of three independent relative-humidity measurements with one circuit. Replacement of the Sensor 3 circuit with TTL oscillator circuit; Difference on relative humidity signals; Ways to monitor the signals at the receiver end.

Focuses on the use of single logic integrated circuits for low-cost relative-humidity radio transmitters. Design of transmitters; Application of capacitor-type percentage-relative humidity sensor; Voltage requirement of a circuit.

Focuses on the design of circuit of a triple relative-humidity radio signal sensor and radio transmitter. Role of the gated oscillators in the circuit; Method to monitor signal at receiver end of the circuit.

Analyzes an electric circuit that measures relative humidity in air via optical fiber sensors. Time constant; Frequency of oscillations; Measurement of signal's frequency.

Suggests that when measuring water in oil to see the dryness of the electric transformer insulation, the measurement of relative humidity is key in providing a clear indication of the danger of water entering the cellulosic insulation. Portable instrument Aquaoil 100A from Syprotec which measures the RH of water in transformer oil; Transformer dryness.

The article evaluates the Permatran-W Model 3/33 Plus humidity testing units from Mocon Inc.

The article discusses about buildings and industrial processes require specific relative humidity operating ranges. Topics include "Performance Rating of DX Dedicated Outdoor Air System Units," developed two calculations for moisture removal efficiency; and the second calculation has integrated seasonal moisture removal efficiency, measuring the moisture removal efficiency at different operating conditions.

The article reports that Museum of Contemporary Art (MOCA) in Los Angeles, California required extensive mechanical upgrades to preserve its collection, maintain and gain tighter control of humidification levels. It mentions need to prevent the deterioration of historic artifacts and art collections with optimization of relative humidity and temperature. It also mentions new building automation system by Sunbelt Controls was also installed and manage energy usage throughout MOCA.

The article discusses the implication of hospital's physical environment on health care-associated infection (HAI) among patients. Topics include the need to create a less infectious environment in the hospital by maintaining relative humidity (rh) in patient care spaces and surface cleaning, the support offered by indoor air hydration to the respiratory tract and physiologic skin defenses of patients, and the need for the management of health care facilities to focus on patient healing.

The article discusses the importance of proper humidity to indoor air quality (IAQ). Topics include association between extreme weather events and atmospheric carbon levels and greenhouse warming, the ASHRAE Infectious Disease Position Document released on October 13, 2022, and reasons that research in epidemiology, infectious disease, mammalian immunobiology, cell biology, microbiology and metagenomics point to the health benefits of relative humidity (RH) between 40 and 60 percent.

The article discusses the reasons to lowering building temperature during the heating season. First is it will lower the energy required to heat a building when the outdoor temperature is cold. Second is it will increase the indoor relative humidity (RH) toward the healthy zone. Third is the air concentration of harmful gases emitted from indoor furnishings and surfaces declines with the consequent increase in RH. Finally, a lower temperature burns more calories.

The article focuses on installation of central chilled water plant and dehumidification system for preservation of collection in the Harry S. Truman Presidential Library and Museum. Topics discussed include challenges of the installation of central chilled water plant and dehumidification system like need for continuous chilled water and tempered air and a stable relative humidity; installation of chilled water pumps; and designing of hot water pumps and air separators by EMCOR Services Fagan.

The article discusses the important building components of indoor air quality (IAQ) and relative humidity (RH) that can affect the healing of patient through both maintenance of the patient's physiological barriers and the movement of pathogens. It explores the high rates of patient deaths brought by healthcare-associated infections (HAIs). It also elaborates the history of infectious diseases and IAQ guidelines in hospitals.

The article presents an interview of Michael Driedger, chief executive officer (CEO), Airsset who discusses how COVID-19 pandemic has increased the use of digital tools. Topics include the use of dry bulb temperature, relative humidity, carbon dioxides related sensors; and the use of formaldehyde and radon sensors built into a device.

The article provides information on acoustic transmission. Topics discussed include the formula for the speed of sound in air, the upper and lower limits of the air medium in acoustic sources, and the effects of relative humidity and air temperature decibel sound pressure level (dbSPL) loss over distance.

The article discusses the indoor air quality (IAQ) of under floor air distribution (UFAD) and displacement ventilation systems. It mentions that the integration of both systems is considered an increasingly known way of providing comfort cooling towards various spaces. It also notes their need of accurate estimates for meeting relative humidity requirements and assuring efficient operations.

The article discusses the recommended temperature and humidity range guide from the American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) in the U.S. It states that the guide recommends 68 to 77 degrees and 44 to 55 percent of relative humidity (rh). It also suggests to provide satisfactory environmental conditions for equipment that has been required by manufacturers.

The article discusses the major space renovation of Optimum Manufacturing Corp., in Charlestown, New Hampshire. The challenge is to meet the need to attain a space temperature of not less than 0.5°Fahrenheit and a relative humidity of not less than 1 percent. The project also aims to have very clean spaces to maintain manufacturing tolerances. It is the company's new $1.2 million Yasda horizontal precision machining center which comprised of about 10,000 cleanrooms.

The article features various intelligent buildings equipment released in the U.S. as of May 2006. Minco's relative humidity sensor is designed to guarantee system accuracies in a previously unavailable economical manner. Spirax Sarco Inc.'s Pivotrol pressure-powered pump is designed to replace conventional pins and linkage with pivots, which reduce fiction and wear. Nielsen-Kellerman's Kestrel 4100 airflow tracker measures temperature and dewpoint and can store 480 data points in its datalogger.

The article focuses on the design specifications of an air conditioning, heating and ventilation system (ACHVS) of a museum. Designing a ACHVS for a museum is a complex task as the preservation needs of various antiquities have to be considered. ACHVS designers must consider the environmental impact of the system on the museum's valuable collections. Several indoor environmental design issues can harm the art collections of museums. Some of the factors requiring careful design consideration include: relative humidity range, control of temperature, air quality, etc.

Reports on the construction of off-site archival storage facility of Library of Congress in phases so that additional storage units or modules can be added when necessary in Fort Meade, Maryland. Completion of the designs of three additional modules and cold storage for microfilm and photographic materials; Intention of the library to build a total of archival storage modules; Extension of the life of printed record materials by cooler temperatures and low relative humidity levels.

This article stresses on the location of installing the humidification system components to achieve absorption and accurate control. Sensor and transmitter location has a significant impact on humidifier performance. Humidistat is a device that monitors and controls relative humidity levels. The humidistat sends a signal to the humidifier to produce or stop producing humidification vapor based on setpoint. Humidification sensors and transmitters affect humidifier output and, therefore, affect a humidification system's ability to meet design requirements. Sensor and transmitter readings must be accurate and pertinent.

Features four thermoplastic resins that can be used as additives to modify thermoplastics and thermosetting plastics. Benefits of polyphenylene oxide in thermoplastic elastomer molding compound; Effect of composition on shrinkage control; Electrical performance of epoxy resin modified with polyphenylene oxide; Effect of composition on dependence of surface resistivity on relative humidity.

The article offers information on products for electronic test and measurement including single-slot PXI vector analyzers from Keysight Technologies, Inc., the HOBO MX1101 temperature/relative humidity data logger from Onset Computer, and the SMP-QFN-8008 socket from Ironwood Electronics.

Comments on the article about microfilms titled 'Kicking the Silver Habit: Confusions of a Former Addict,' by Carl M. Spaulding, published in December 1978 issue of the 'American Libraries.' Water and high-relative humidity tolerance of diazo and vesicular microfilms; Success of Spaulding in putting the issue of storage conditions as it relates to the so-called archivality into perspective.

Features various mechanical engineering equipment and supplies. Includes Omega Engineering Inc.'s temperature and relative humidity recorder; Fluid Components International's compressed-air flowmeter; Yokogawa Corp. of America's digital-storage oscilloscope.

Presents literature and catalogs on heating, ventilation, and air conditioning equipment. Includes Spectrum 2000 temperature and relative humidity datalogger; Series 21 centrifugal fans; HI-E Dry dehumidifiers.

The article discusses the study by the Prairie Swine at the University of Saskatchewan on hog transportation in Canada. The study used data collected during summer and winter hauling conditions in two parts of the country, Quebec and Saskatchewan. Researchers from both parts analyzed data related to the physical condition of the pigs, temperature, relative humidity and hauling distance. They presented tips and transport suggestions based on their findings.

The article discusses the increasing demand for specialist cleanroom facilities for nanotechnology research and development. Nanoscale processes are being developed for wide ranging applications in precision engineering, electronics, and optics, among others. These facilities are an order of magnitude more controlled than traditional semiconductor facilities. Cleanrooms control particulate levels and act as a barrier to micro-organism contamination. Factors such as airflow, temperature, relative humidity, and more, have to be controlled.

The article focuses on several aspects of tank-mixing agrichemicals for farming in the U.S. It mentions that crop response to tank-mixture will depend upon several factors including the chemicals, air temperature, time of day, relative humidity, leaf wetness, and overall crop health. It also mentions about mixing of water soluble granules, suspoemulsions and surfactants for tank-mixing agrichemicals.

CertainTeed Corp. claims to have introduced the first vapor retarder in the U.S. that breathes and allows excess moisture to escape from wall cavities. Called MemBrain, this new, patented smart vapor retarder is a polyamide film that changes permeability from less than 1 perm at low humidity to greater than 20 perms at high relative humidity. According to CertainTeed, the more typical vapor retarder, polyethylene, does not allow drying when the seasons change.

Focuses on the maintenance of relative humidity (rh) level in manufacturing settings. Relationship of minimum rh requirements, process and product; Use of humidity to control static electricity; Systems to maintain humidity; Vapor barriers; Barrier isolation technology; Design of air supply systems.

Part IV. Focuses on the high relative humidity and low temperature in the air supply system that can have serious and direct affects on indoor air quality (IAQ) and can cause equipment damage. Factors to be considered carefully in heating, ventilation, air conditioning (hvac) system design; Difference between the indoor air and dewpoint temperatures; Cost associated with IAQ degradation and the selection of supply grille of superior design.

The article describes the case of tea processor Bajrang Tea Factory in West Bengal, India which experienced improved tea quality after installing the JetSpray humidification system from Regent Humidification. Topics discussed include the features and capabilities of Regent's JetSpray system, the ways in which relative humidity (RH) impacts the quality of tea and the benefits gained by Bajrang from the technology.

Contends that the Defense Meteorological Satellite Program F-11 Spacecraft should give allied commanders contemplating actions in the Middle East more accurate data. Aerojet Electronic Systems Div. has determined that its Special Sensor Microwave Temperature (SSM/T-2) on board the satellite is meeting or exceeding specifications for measuring specific and relative humidity data.

The article offers information on electronic relative humidity sensors. The sensors are used to measure the percentage of moisture in the air referenced to the maximum level of moisture the air an hold at the such temperature and pressured. Electronic relative humidity sensors fall into two categories, such as the resistive and capacitive categories.

The article focuses on a research published in "Nature Communications," which described the use of evaporation to power an engine. Cited are some systems that may be powered by evaporation-driven engines such as power robotic systems, sensors, devices and machinery functioning in a natural environment. Also noted are challenges associated with scaling up mechanical force to create macroscopic devices such as slow rate of relative humidity change.

The article focuses on a research related to indoor air quality (IAQ) and health and its relevance for hospital facilities. Topics discussed include relevance for relative humidity (RH) for viability of pathogens, significance of indoor climates for wound healing, respiratory infections and dehydration, negative impact of dry climatic conditions on skin inflammation, importance of adjustable temperature and RH and prioritization of reducing energy costs over patient health for hospitals.

The article focuses on the impact of weather to growers in Western U.S. Topics discussed include the absence of rain during the main part of the growing season, the overall relative humidity, seed production in the western states, the high quality of seeds due to decreased incidence and concern with diseases caused by pathogenic fungi and bacteria, and the long growing seasons that characterized production systems in the west.

The article focuses on the new dehumidification system for the indoor pool facility of McDonald's Hamburger University (HU) in Oak Brook, Illinois. It states that the Hyatt Lodge at McDonald's corporate campus wanted the pool facility to maintain ideal temperature and humidity conditions while staying free of condensate. It says that the replacement model is a PoolPak SWHP 190SR which has a 40-ton capacity to remove 215 pounds of moisture per hour at 50% relative humidity and 82°F.

The article focuses on Washington State Archives which has installed wireless environmental monitoring system to ensure optimal storage conditions for both their paper records and digital archives. Harold Stoehr, the archive's network administrator, explains that temperature and relative humidity monitoring is critical to the preservation of their records. It also notes that the facility has added Onset HOBO ZW Series wireless data nodes.

The article reports on the installation of the 45-pound Nortec resistive element humidifier in a yoga studio owned by Elaina Zorensky and Dr. Ben Zorensky in Tempe, Arizona. It states that Alan Snow of LDP Associates Inc. advised Elaina and Ben to use a system from Nortec because of its top quality products and superior customer service. It notes that the humidifier is designed for precise humidity and responds to the changing environments while maintaining relative humidity setpoint.

The article offers information on the fungus, Didymella bryoniae which causes gummy stem blight, the most feared disease of watermelon. Blight disease happens in hot, wet weather with temperatures in the mid-80s and above with relative humidity greater than 95% as the best conditions of its outbreak. The spread of this disease can be airborne or seedborne made via infected transplants and rain splash. The author recommends the rotation of products and the use of a wide spectrum of fungicides to combat the disease.

The article reports on the retrospective analyses which refute the association of relative humidity in the operating room (OR) and LASIK refractive outcomes in Boston, Massachusetts. According to Robert K. Maloney, MD, the analysis is providing further evidence that room temperature is a relevant factor. It notes that it was found that the mean OR humidity level during the primary procedure is identical and not different in two groups which is 40% and 39% respectively.