Discomfort luminance level of head-mounted displays depending on the adapting luminance

The Images in an immersive head-mounted display (HMD) for virtual reality provide the sole source for visual adaptation. Thus, significant, near-instantaneous increases in luminance while viewing an HMD can result in visual discomfort. Therefore, the current study investigated the luminance change necessary to induce this discomfort. Based on the psychophysical experiment data collected from 10 subjects, a prediction model was derived using four complex images and one neutral image, with four to six levels of average scene luminance. Result showed that maximum area luminance has a significant correlation with the discomfort luminance level than average, median, or maximum pixel luminance. According to the prediction model, the discomfort luminance level of a head-mounted display was represented as a positive linear function in log₁₀ units using the previous adaptation luminance when luminance is calculated as maximum area luminance.     

Study of residual stresses in tailor rolled blanked Al5J32-T4 sheets

Several automotive parts such as door panels have been manufactured by using load-adapted blanks for crash optimization and weight minimization.Recently, Tailor Rolled Blanks (TRB) has been introduced to remove the disadvantages of a welding process which was used in joining panel components.TRB offers better structural design capabilities due to the seamless transitions on the panels with different thicknesses.In spite of the advantages of the process, TRB leaves internal stresses in the panel.This residual stresses lower the formability of Tailor Rolled Blanked (TRBed) parts and cause cracks near severe curvature during subsequent forming processes.In this research, the residual stresses of TRBed Al5J32-T4 sheets were studied by X-ray stress analysis, and also microstructure was observed along the rolling direction.In addition, heat treatment was done after TRB process in order to compare the residual stresses to that of the TRBed sheets before the heat treatment.     

Identification of novel IgE-binding soybean allergens using serological analysis of a recombinant cDNA expression library (SEREX)

New immunoglobulin E (IgE)-binding proteins from soybean (Glycine max L.) were identified using serological analysis of a recombinant cDNA expression library (SEREX) derived from soybean seeds and an enzyme-linked immunosorbent assay (ELISA). A soybean cDNA expression library was synthesized using the lambda ZAP express phage vector system and screened using sera of soybean-sensitive patients with atopic dermatitis (AD). A total of 3 new IgE-binding soybean proteins were identified as enolase, triosephosphate isomerase (TPI), and malate dehydrogenase (MDH). Full-length cDNAs were cloned into the expression vector pET15b, and expressed in Escherichia coli BL21 (DE3). The recombinant proteins were purified using affinity chromatography, followed by ELISA, with the sera of AD patients, resulting in positive reactions. The cDNA sequences were submitted to the GenBank Nucleotide Sequence Database with the accession numbers AY496909 (enolase), AY631048 (TPI), and AY496910 (MDH).     

xMax的类正弦波调制技术

通过对xMax技术指标的分析，阐述了实现xMax的方法。在此基础上提出了一种能实现xMax的类正弦波调制技术。该调制技术通过对类正弦波信号的单周期调制实现信号对信息的携带；并且能达到xMax主带宽窄、边带功率谱密度低、发射功率低、传输速率高等性能指标。通过理论分析和仿真验证，该调制技术功率谱主峰值带宽为300 kHz，边带功率谱密度比峰值功率谱低40 dB，使得边带能很好地隐藏在背景噪声中，传输速率达到7.5 Mbit/s。     

Entrapment of nutrients during cholesterol removal from cream by crosslinked β-cyclodextrin

This study was designed to elucidate the quantities of nutrients entrapped during cholesterol removal from cream by crosslinked β-cyclodextrin (β-CD, 4–12%, w/v) and to evaluate the amounts of the residual β-CD in cholesterol-removed cream treated by crosslinked β-CD. The content of lactose in the control cream (without the treatment by crosslinked β-CD) was 2.74%, and the amounts of lactose entrapped by crosslinked β-CD ranged from 0.00 to 0.03%. The total amounts of the entrapped short-chain free fatty acid (FFA) and free amino acid (FAA) ranged from 0.04 to 0.12 ppm and from 0.37 to 0.48 μmol/mL, respectively. The amounts of the entrapped water-soluble vitamins (L-ascorbic acid, niacin, thiamine and riboflavin) ranged from 0.01 to 0.05 ppm, from 0.01 to 0.05 ppm, from 0.00 to 0.04 ppm and from 0.02 to 0.05 ppm, respectively. The entrapped amounts of nutrients mentioned above were not remarkably affected by the concentrations of crosslinked β-CD (4–12%, w/v). The very small amounts of residual β-CD in the cholesterol-removed cream were measured (1.86–6.11 ppm). Based on the data obtained from the present study, it is concluded that the amounts of entrapped nutrients were negligible during cholesterol removal from cream by crosslinked β-CD, and the amounts of residual β-CD in cholesterol-removed cream were trace.     

Screen printing for support-pillar placement for vacuum glazing and the effects of pillar spacing on strength properties

Maintaining a vacuum between the two glasses to maximize the heat insulating performance, it is indispensable to array the pillar for the vacuum glazing to maintain the vacuum gap. In this paper, to investigate the effect of the spacing of the pillars arranged using the screen printing method on the strength of the glass, a bending strength test was carried out by design and fabricating a ROR bending strength test jig based on the Euro standard. In the strength test results, the experimental results were analyzed using the Weibull distribution, which is a statistical analysis method mainly used for evaluating the breaking strength of brittle material. Based on the analysis results, the placement spacing of the pillars proved validity for maintaining the vacuum glass gaps.     

Linearization of T-S fuzzy systems and robust H_∞ control

Takagi-Sugeno (T-S) fuzzy model is difficult to be linearized because of membership functions included. So, novel T-S fuzzy state transformation and T-S fuzzy feedback are proposed for the linearization of T-S fuzzy system. The novel T-S fuzzy state transformation is the fuzzy combination of local linear transformation which transforms local linear models in the T-S fuzzy model into the local linear controllable canonical models. The fuzzy combination of local linear controllable canonical model gives controllable canonical T-S fuzzy model and then nonlinear feedback is obtained easily. After the linearization of T-S fuzzy model, a robust H _∞ controller with the robustness of sliding model control (SMC) is designed. As a result, controlled T-S fuzzy system shows the performance of H _∞ control and the robustness of SMC.