The Underlying Factors of Word Reading Rate

The discovery of the acceleration phenomenon and the contribution of reading rate as an independent variable to the quality of the reading process brought about a systematic research project that examined the underlying factors of word reading rate. Word reading requires processing information in the visual and auditory modalities and relies on word recognition skills such as phonological and orthographic decoding. Therefore, it is believed that speed of processing of some subset of the above sub-processes affects word-reading rate. By using experimental manipulations relying on both electrophysiological (ERPs) and behavioral measures, the sub-processes that are activated in word reading can be distinguished and shown to differentiate between the early perceptual, the central cognitive, and the motoric stages of activation. Results indicate that word reading rate is related to basic speed of processing in the modalities activated during the reading process. However, the processing level within each modality that contributes to self-paced and fast word reading rate differs according to age and the efficiency of reading skills.     

法医鉴定用密度仪的设计

在法医鉴定工作或科学研究领域，组织器官密度的精确测量常常是重要的环节。作者针对目前法医密度测定尚无精确且易于操作的专用仪器的情况，研制了一种法医鉴定用密度仪。在描述整个仪器系统结构和工作原理的基础上，进一步对系统在实验过程中出现的误差进行了分析，并有针对性的提出了相应的校正方法。最后采用C Builder中的TClientDataSet创建客户端数据集用于管理所获得的有效数据。整套软硬件系统运行可靠、使用方便。     

环境可控温室控制系统总体设计

该文通过对作物生长环境因素的剖析，确定了蔬菜作物最佳生长发育的环境条件，并设计了以单片机、传感器等技术为核心的温室环境自动控制系统。     

检测内燃机铸件的电涡流传感器输出信号的平移调整

利用电涡流传感器检测活塞、曲轴等内燃机铸件性能时,人工调节参比件与参比线圈的相对位置,使输出与输入的关系截距变化,斜率不变,从而使输出值增大,满足预定要求。     

用位移传感器测量固体材料的杨氏模量

介绍了一种用位移传感器测量固体材料的杨氏模量的方法,是一种学生了解和掌握微小位移的非电量电测方法.     

光纤传感器应用研究

光导纤维创造了光电子学的新领域。光纤传感器发展非常迅速,具有损耗低、重量轻、抗电磁干扰强以及节约能源等特点,目前已有光纤压力传感器、光纤磁场传感器、光纤温度传感器、光纤应变传感器、光纤电场传感器等,并已广泛用于非电量的测试中。     

Reliability of accelerometry to assess impact loads of jumping and landing tasks

Overuse injuries, resulting from repetitive subacute impact loading, are a problem in high-performance sports. Monitoring of impact loading may aid in the prevention of these injuries. The current study aimed to establish the intra-day and inter-day reliability of a tri-axial accelerometer to assess impact loading during jumping and landing tasks. Twelve participants wore an accelerometer on their upper and lower back. They performed a continuous hopping task as well as drop landings and rebound jumps from three drop heights (37.5, 57.5 and 77.5 cm), peak resultant acceleration (PRA) was calculated for all tasks. The tasks were performed twice, one week apart at the same time of day. The difference in the mean, intra-class correlation coefficient, coefficient of variation and Cohen’s effect size were calculated as measures of reliability. PRA showed good intra-day reliability for the hopping task. Inter-day reliability of the PRA was moderate to good across all tasks. Reliability of PRA was slightly higher when accelerations were recorded on the lower back compared to the upper back. To assess impact loading, during continuous hopping, drop landings and rebound jumps, PRA recorded at both the upper and lower back appears to be a reliable measure.     

Do accelerometers mounted on the back provide a good estimate of impact loads in jumping and landing tasks?

Artistic gymnasts are frequently exposed to both low- and high-magnitude loads through impacts with the apparatus. These impact loads are thought to be associated with the high injury rates observed in gymnastics. Due to the variable apparatus and surfaces in gymnastics, impact loads during training are difficult to quantify. This study aimed to use triaxial accelerometers mounted on the back to assess impact loading during jumping and landing tasks. Twelve participants were fitted with an accelerometer on their upper and lower back, before performing a continuous hopping task, as well as drop landings and rebound jumps from various heights (37.5, 57.5, and 77.5 cm) onto a force platform. Peak resultant acceleration (PRA) was low-pass filtered with four cut-off frequencies (8, 15, 20, and 50 Hz). Filtering of PRA with the 20 Hz cut-off frequency showed the highest correlations between ground reaction force (GRF) and PRA. PRA recorded at the upper back, filtered with a 20 Hz cut-off frequency, appears to provide a good estimate of impact loading for continuous hopping and rebound jumps, but less so for drop landings since correlations between GRF and PRA were only significant when landing from 57.5 cm.     

Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises

Whole body vibration (WBV) is used as a training method but its physical risk is not yet clear. Hence, the aim of this study is to assess the exposure to WBV by a measure of acceleration at the lower limb under dynamic and static postural conditions. The hypothesis of this paper is that this assessment is influenced by the frequency, position, and movement of the body. Fifteen healthy males are exposed to vertical sinusoidal vibration at different frequencies (20–60 Hz), while adopting three different static postures (knee extension angle: 180°, 120° and 90°) or performing a dynamic half-squat exercise. Accelerations at input source and at three joints of the lower limb (ankle, knee, and hip) are measured using skin-mounted accelerometers. Acceleration values (g) in static conditions show a decrease in the vibrational dose when it is measured at a more proximal location in the lower extremity. The results of the performed statistical test show statistically significant differences (p < 0.05) in the transmissibility values caused by the frequency, the position, and to the presence of the movement and its direction at the different conditions. The results confirm the initial hypothesis and justify the importance of a vibration assessment in dynamic conditions.     

能用于F-可见光谱分析的新型分子体系显色剂

本文就可作为F^-可见光谱分析显色剂的新型超分子化合物，从分子结构、电子诱导、对阴离子的显色属性和对F^-选择性等方面做了评述。为发展新的F^-光谱分析法提供一些借鉴。