Previous literature has shown that spatial anxiety relates to navigation abilities (Hund & Gill, 2014). How spatial anxiety effects the spatial-temporal perception of one’s environment is not well known. The present student aimed to examine how spatial anxiety related to the memory of distances and time to landmarks in the surrounding area. Participants completed a battery of navigation questio...

Laser shaping was introduced to maskless projection soft lithography by using digital micro-mirror device (DMD). The predesigned intensity pattern was imprinted onto the DMD and the input laser beam with a Gaussian or quasi-Gaussian distribution will carry the pattern on DMD to etch the resin. It provides a method of precise control of laser beam shapes and photon-induced curing behavior of res...

The huge and exponentially growing diversity of digital material confuses the users who are confronted to the difficulty of choosing the right and appropriate document or information. On the same way the federation of Learning Object Repositories could conduct to the same difficulty while wanting to obtain a critical mass of learning object in order to facilitate their reusability. In this pape...

Multicarrier Code Division Multiple Access is the most promising technique for high speed data transmission. However, the MC-CDMA signals are characterized by large peak to average power ratios (PAPR), which can reduce the system efficiency. In this paper PAPR reduction of an MCCDMA system using SLM technique is investigated for different modulation schemes. The binary phase sequences considere...

The major drawback of orthogonal frequency-division multiplexing (OFDM) is its high peak-to-average power ratio (PAR), which gets even more substantial if a transmitter with multiple antennas is considered. To overcome this problem, in this paper, the partial transmit sequences (PTS) method—well known for PAR reduction in single antenna systems—is studied for multiantenna OFDM. A directed appro...

Measurements of partially spatially coherent infra-red laser beam intensity fluctuations propagating through a hot-air turbulence emulator are compared with visible laser beam intensity fluctuations in the maritime and IR laser beam intensity fluctuations in the terrestrial environment at the United States Naval Academy. The emulator used in the laboratory for the comparison is capable of gener...

The degree of similarity between L1 and L2 sounds is said to be crucial for L1/L2 sound distinction. Similar L1 and L2 sounds, according to the Speech Learning Model (SLM), tend to be undistinguished. Yet, much has been left undetermined of what counts as “similar”. In this study, the relation between phonetic similarity and L1/L2 sound distinction is explored by examining whether different aco...

In this work, we make a study on the effect of training set on statistical language modeling (SLM). A corpus selection system based on perplexity is presented. It is tested in two experiments: one is to select optimal training corpus for generating a domain-specific SLM; the other one is for generating an optimal SLM for a LVCSR system. The results show that the training corpus is important for...

In order to realize high-yield speckle modulation, we developed a novel spatial light modulator using zinc oxide single crystal doped with nitrogen ions. The distribution of dopants was optimized to induce characteristic optical functions by applying an annealing method developed by us. The device is driven by a current in the in-plane direction, which induces magnetic fields. These fields stro...