Experiencing Presence in a Gaming Activity Improves Mood After a Negative Mood Induction

Research suggests that immersion in computer games is beneficial for recovering from stress and improving mood. However, no study linked explicit measures of presence—individually experienced immersion—to mood enhancement. In the present experiment, immersion of a gaming activity was varied, and levels of presence and enjoyment were measured and connected to mood repair after a stress-induction. The participants (N = 77) played a game in virtual reality (VR; high immersion), on the desktop (medium immersion), or watched a recording of the game (low immersion). Positive emotions were enhanced in the high and medium, but not the low immersion condition. Presence was a significant predictor in the VR condition. Furthermore, an explanatory mediation analysis showed that enjoyment mediated the effect of presence on mood repair. These findings demonstrate positive effects of presence experiences in gaming. Strong presence in VR seems especially helpful for enhancing mood and building up positive emotional resources.

The Measurement of Dielectric Properties of Leucaena Leucocephala Biocomposite Antenna Substrate in Water Immersion Condition

This paper contributes the dielectric properties measurements on five mixture of biocomposite antenna substrates in water immersion condition. The fabrications process of the biocomposite antenna substrate uses the compounding flat press method between the Polypropylene acting as laminator and stem three of Leucaena Leucocephala as a filler. The dielectric properties measurements conducted by using the KEYSIGHT 85070E coaxial probe method, with the observe frequency range of 1 GHz to 20 GHz and ASTM D570 procedure for water immersion process. The percentages of the water absorption rate reported 0.026 % (PP100), 0.18 % (PB9010), 0.22 % (PB8020), 0.28% (PB7030) and 0.35 (PB6040), while the changes of the dielectric properties reported increase 10.31 % (PP100), 11.16 % (PB9010), 15.48 % (PB8020), 23.60 % (PB7030) and 36.35 % (PB6040) when compared with the dielectric properties measurements before 24 Hours ASTM D570 water immersion procedure. The changes of the water absorption rate and dielectric properties percentages in line with the increments of filler composition mixture. The data from this measurement useful to observe the aging shielding capability of the material against water and moisture content absorption for antenna substrate material.

Investigation of immersion influence on dynamic properties of high-speed railway subgrade with semi-rigid waterproof functional layer through field-excitation testing

The subgrade below the under-construction Kunming–Shanghai high-speed railway faces serious stability problems induced by considerable swelling and shrinkage volume change of expansive soil along with variation of moisture content. To prevent the occurrence of potential damage, reasons for the frequent occurrence of drainage ditch breakage and platform damage along the railway corridor in expansive soil areas were analyzed. A novel integral ancillary facility and semi-rigid waterproof functional layer were developed. Large-scale field dynamic tests were carried out to investigate the fatigue performance of the waterproof functional layer and the influences of different service environments (relatively dry condition and immersion condition) on the dynamic response of the subgrade. Results show that the fatigue property and waterproofing capability of the waterproof functional layer can fulfill the standard requirements for the high-speed railway subgrade. There was an enlargement phenomenon of the dynamic stress and vibration velocity when the service environment of subgrade changed from a relatively dry condition to an immersion condition. The vibration velocity seemed to increase along the depth of the graded broken stone surface layer and decrease linearly with further depth increase from the bottom surface of the waterproof functional layer.

Optimization of Superior Shoes Board Immersion Condition

This paper studied on the influence of impregnation process on original board by using the Styrofan SD 332S which could improve the international bending strength, then own higher wear-resistant, fold-resistant and tear-resistant. Trough single factor experiments, the optimum impregnation processing conditions were: wet cardboard dryness of 45%, immersion at 35 °C for 4 minutes, preliminary drying at 70 °C under the premise of 300 ml, 20% latex concentration, subsequent drying at 100°C for 2h. Under the conditions of impregnation process, the property index of shoes board were: tensile strength 0.34 kN/cm2 through immersion 4 h, elongation of 1.56% through immersion 1 h, shrinkage of 0.84% through high temperature drying 1 h, peeling strength between layers 0.29N, fold endurance 5721 times.

Nanoporous Copper Dealloyed from a Nanocrystallized Ticu Alloy

Nanoporous copper (NPC) was fabricated through dealloying nanocrystallized TiSubscript text50Cu50 ribbon alloy under a free immersion condition in HF solutioSubscript textns at 25 °C. Multimodal nanoporous structure was formed due to the presence of Ti3Cu4 phase, which was co-precipitated with Ti2Cu during the heat treatment at T = 400 °C (Italic textTSubscript textg Italic textT Subscript textx). The presence of multiphases in tItalic texthe starting material caused the different behavior in the evolution of nanoporosity. In 0.03 mol/L HF solution, the bimodal nanoporous copper with a pore size of 54 nm and 184 nm was obtained in different regions where the composition differed. The ligament scale lengths in two regions were confirmed to be 54 nm and 203 nm, respectively. In 0.13 mol/L HF solution, the difference in the pore size and phase separation became weak, accompanying with the evolution of larger pores and smaller ligaments. The residue after dealloying was confirmed to be fcc Cu, indicated by the presence of Cu (111), (200), (220) and (311) in XRD patterns and TEM selective area diffraction pattern. The microstructure of the starting materials for dealloying, such as intermetallic phases, played a key role in the formation of the final multimodal nanoporous structure.

EIS Study on the Deterioration Process of Organic Coatings under Immersion and Different Cyclic Wet-Dry Ratios

Under immersed and we-dry cyclic conditions, the deterioration processes of the organic coating on carbon steel surface have been comparatively studied using electrochemical techniques. The wet-dry cycles were carried out by exposure to 4 h immersion and 4h dryness (4-4h cycles) and 12h immersion and 12h dryness (12-12h cycles) conditions, respectively. The immersion condition was carry out in a 3.5% NaCl solution and drying at 298K and 50% RH. According to the EIS characteristics, the entire deterioration processes under above three mentioned conditions can be divided into three main stages, consisting of the medium penetration, corrosion initiation and corrosion extension. Comparing with the immersed, the 4-4h wet-dry cycles greatly accelerated the entire deterioration process; especially during the corrosion initiation and the corrosion extension periods, leading the paint system lose its anti-corrosive performance in a short period. However, the 12-12h wet-dry cycles decelerated the entire deterioration process, prolonging the coatings anticorrosive ability. The acceleration mechanism of the coatings and underlying metal corrosion under wet-dry cycles was discussed based on the above results.