Based on both subjective and objective data, a study was carried out in order to identify differences in the perception of thermal comfort of office workers in naturally ventilated and air-conditioned buildings. The analysis of the interviews shows that occupants of naturally ventilated office buildings are significantly more satisfied with their thermal environment than occupants in air-condit...

Materials with engineered thermal expansion, capable of achieving targeted area/volume changes in response to variations in temperature, are important for a number of aerospace, optical, energy, and microelectronic applications. While most of the proposed structures with engineered coefficient of thermal expansion consist of bi-material 2D or 3D lattices, here it is shown that origami metamater...

Active thermography is a relatively new NDE technique, in which either a pulse or sinusoidal thermal stimulus forms the basis for conventional Pulsed (PT) and Pulsed Phase (PPT), and Lock-in (LT) Thermography respectively. Recently a new approach to active thermography was proposed in which the thermal stimulus is frequency modulated. In Frequency Modulated Thermal Wave Imaging (FMTWI), a speci...

Thermal imaging cameras are powerful tools for measuring the temperature distributions on the surfaces of water bodies. The velocity distribution of a water surface can also be determined by recording the motion of the water surface temperature distribution with a thermal imaging camera and then applying particle image velocimetry (PIV) methods to sequential thermal images to obtain the velocit...

− The paper presents some new measurements and instrumentation paying a special attention to the thermal behaviour of modern manufacturing systems. Acording to a CIRP evaluation, more than 50% of the machining errors, even in the case of modern machine tools, are due to the thermal phenomena. The study of thermal behaviour for machine tools is very important for precision processing, e.g. grind...

This paper illustrates an application of a technique for predicting the thermal characteristics of a bidirectional thermocycling device for polymerase chain reaction (PCR). The micromilling chamber is oscillated by a servo motor and contacted with different isothermal heating blocks to successfully amplify the DNA templates. Because a comprehensive database of contact resistance factors does no...

To evaluate the thermal resistance of marine invertebrates to elevated temperatures under scenarios of future climate change, it is crucial to understand parental effect of long acclimatization on thermal tolerance of offspring. To test whether there is parental effect of long acclimatization, adult sea cucumbers (Apostichopus japonicus) from the same broodstock were transplanted southward and ...

In this study, the characteristics of a photovoltaic (PV) ribbon (t = 0.25 mm) joint with 60Sn40Pb and 62Sn2Ag36Pb solders were evaluated using thermal shock tests. The thermal shock tests were performed under three conditions: −40–65 ◦C, −40–85 ◦C, and −40–105 ◦C. The results of these tests were analyzed using electroluminescence (EL) and cross-sectional images. Following testing, broken metal...

A fundamental understanding of the thermal effects on nanofluid behaviors is critical for developing and designing innovative thermally responsive nanodevices. Using molecular dynamics (MD) simulation and experiment, we investigate the temperature-dependent intrusion/adsorption of water molecules into hydrophobic nanopores (carbon nanotubes and nanoporous carbon) and the underlying mechanisms. ...

Although over a hundred thermal indices can be used for assessing thermal health hazards, many ignore the human heat budget, physiology and clothing. The Universal Thermal Climate Index (UTCI) addresses these shortcomings by using an advanced thermo-physiological model. This paper assesses the potential of using the UTCI for forecasting thermal health hazards. Traditionally, such hazard forecas...