Effects Of Different Humidities Research Articles

Sensing performance of textile strain sensors with different weave structures

Many conductive fabrics have been widely used as fabric strain sensors in recent years due to their excellent flexibility. In this study, high-tenacity polyester warp yarn and silver-coated nylon weft yarn were used to produce six types of conductive fabrics with different structures. The surface morphology of silver-coated nylon yarn was observed under a microscope, and the yarn was placed in an airtight container to test the effect of different humidity on the resistance of the yarn. DM6500 digital multimeter was used to test the resistance sensitivity, fatigue resistance, repeatability, and antistatic properties of conductive fabric samples. The results showed that the change in yarn surface material, external humidity, and strain affected the change in yarn resistance. Different weave structures affected the sensing performance of the fabric. The tighter the structure, the better the sensitivity and antistatic properties, the looser the structure, the better the fatigue resistance and repeatability. Two types of fabric and nylon gloves with different structural tightness are used to make intelligent data gloves. The results showed that both fabrics had good application prospects in limb movement detection.

The effect of curing conditions on the expansion efficiency of MgO expansion agent

In order to further promote the research and application of MgO expansion agent in concrete field, this paper carried out the effect of different humidity and temperature conditions on the expansion properties of mortar and mortar specimens mixed with MgO expansion agent. In addition, the mechanism of the factors affecting the sensitivity of the MgO expansion agent is revealed by combining microscopic technology. The results show that the higher the curing temperature and the greater the curing humidity, the greater the expansion efficiency of the MgO expansion agent. The temperature of 20~40°C has no obvious effect on the efficiency of the MgO expansion agent, but the expansion value of the specimen doubles as the temperature rises to 40~80°C. Besides, the higher the curing humidity, the better the expansion efficiency of the MgO expansion agent, but the MgO expansion agent is more sensitive to the low humidity environment, and the specimen shrinks in the lower humidity environment (RH=60%).

Spray Drying and Crystallization of Lactose with Humid Air in a Straight-Through System

The effects of different humidities on process yields and degrees of crystallinity have been studied for spray-dried powders from the spray drying of lactose with humid air in a straight-through system. According to Williams-Landel-Ferry (WLF) kinetics, it was suggested that a higher particle temperature and lower glass transition temperature would increase the crystallization rates of the particles during the spray-drying process. Freshly humidified air produced by a Buchi-B290 spray dryer as a humidifier before the main spray dryer decreased the particle glass transition temperature (Tg), while allowing the particle temperature (Tp) to reach higher values by using an insulated drying chamber. The results showed that higher Tp − Tg, as a result of applying humid air, improved the process yield from 21 ± 4% to 26 ± 2% and the lactose crystallinity by decreasing the latent heat of crystallization for the powder products from 43 ± 1 J/g to 30 ± 11 J/g. It has been found in this study that the humidity of the inlet air should be adjusted in such a way as to not exceed relative and absolute humidities of 2.7–3% and 65–70 g/kg DA, respectively, at the outlet of the drying chamber, to give the most crystalline particles.

Effects of Different Humidity on the Growth and Field Emission Properties of CuO Nanowires

Effects of Different Humidity on the Growth and Field Emission Properties of CuO Nanowires

The Effects of Humidity on Thermal Conductivity of Fir Wood

In this study it was aimed to describe the effects of different humidity on thermal conductivity of Uludag Fir (Abies bornmulleriana M.). The lowest thermal conductivity of 0.0910 Kcal/mh°C was obtained from oven-dry samples. The highest thermal conductivity of 0.1904 Kcal/mh°C was obtained in completely wet samples. Consequently, oven-dry wood samples could be used as insulation material.

The Effects of Different Relative Humidity with Low Temperature on Skin Physiology

People always experience different humidity and temperature in very short span of time. Therefore, people can adapt themselves to the changes of environment by their physiological changes. Many studies had showed that relative humidity (RH) affects thermal regulatory process. However, there is no related research showing the effects of different humidity with low temperature on skin physiology. The purpose of this study was to evaluate the effects of different RH with low temperature on skin physiology. Twenty subjects were selected for this study. All subjects stayed a chamber in 60% RH ands 24°C for 30minutes, and then moved to a chamber of 60% RH and 10°C on the first day. The second day, the combination of the chamber changed to 90% RH and 10°C. Skin temperature and skin water content were tested very minutes from the beginning to the 20th minute. The conclusions indicated that lower RH would induce lower skin temperature. Gender was not a factor to influence the skin temperature on different RH. Skin water content may not easily changed in a short span of time.

Clothing as a source of fibres within museums

This paper examines the role of visitors’ clothing as a source of fibres and dust in museums. Some idealised experiments determined the mass of fibres and dust emitted from clothing and the range of particle sizes found. In chamber studies it was possible to examine the effect of different humidity and airflow on fibre release. Image analysis was used to determine particle size from sub-micron to giant particles including clothing fibre. Clothing was a significant contributor to fibre and dust generation and at low humidity winter garments composed largely of wool was especially large. High air velocity increased particle shedding from clothing. Clean clothing typically released a third to a tenth the weight of particulate material from dirty clothing. It is possible that the fibres and dust produced indoors from visitors could be reduced by an air-shower at the entrance, but less intrusive procedures such as keeping visitors at a distance from objects may be preferable.

Effect of pinealectomy on the testicular response of the freshwater snake Natrix piscator to different environmental factors

The effects of different humidity, photoperiod, and temperature regimes on the testicular function of the tropical water snake Natrix piscator were investigated in both sham-operated and pinealectomized snakes. Moderate humidity (50 ± 5%) had no effect on the testis, but high humidity (85 ± 5%) increased the testicular weight and activity of sham-operated snakes after 3, 6, and 9 weeks. Exposures to 14L:10D or 24L:0D and high temperature (42 ± 2 °C) inhibited testicular weight and activity in sham-operated snakes, whereas exposure to 10L:14D or 0L:24D and a low temperature (20 ± 2 °C) had no effect. Pinealectomized snakes did not respond to any of these experimental conditions, but their testicular weight remained the same as that of the pinealectomized controls under natural environmental conditions. The pineal gland showed an opposite response to that of the testes. Pineal gland weight decreased under high humidity and increased under 14L:10D, 24L:0D, and high temperature. These findings suggest that the ecofactors humidity, photoperiod, and temperature play a role in the regulation of testicular function in this snake, and that the pineal gland is implicated in the mediation of these factors.

Effects of Different Humidities, at Various Temperatures, on the Early Development of Four Saturniid Moths (Platysamia Cecropia Linnaeus, Telea Polyphemus Cramer, Samia Walkeri Felder and Felder, and Callosamia Promethea Drury), and on the Weights and Water Contents of their Larvae

Different humidities may affect insect development by modifying its rate and by influencing mortality. In general, low humidities exert only a slight effect on the eggs of insects adapted to life in a relatively dry environment. Thus, Holdaway ('32), using the egg of the flour beetle, Tribolium confusur, found that at 270 C., incubation required approximately the same length of time at 75 per cent relative humidity as in dry air, survival being slightly higher at lower humidities. On the other hand, the embryonic development and survival of the eggs of many insects are influenced to a greater extent by low humidities, which in these cases are shown to be detrimental, prolonging the egg stage and increasing mortality (Janisch, '30; Pyenson and Sweetman, '31; Evans, '34; et al.). The influence of temperature on the physiological processes and survival of insects has been extensively studied, and the results have been summarized by Uvarov ('31) and B6lehradek ('35). In addition to its modification of metabolic rate, growth, and survival of the organism, temperature also conditions the responses of insects to other factors such as