Based on the measurement of dispersion characteristic and birefractive index of the fluorinated polyimide film,a statistical optimum design method is proposed and used to realize the design of 32- and 36-wavelengths o...Based on the measurement of dispersion characteristic and birefractive index of the fluorinated polyimide film,a statistical optimum design method is proposed and used to realize the design of 32- and 36-wavelengths optical waveguide wavelength-interleave coupler(i,e.,interleaver) with the optimization of polarization fluctuation and wavelength interval of 0.8 nm at 1 550 nm.The largest cross coupling ratios of the two interleavers are respectively less than 1.8% and 3.5%,while the least through coupling ratios are respectively greater than 98.2% and 96.5%.The output differences due to polarization fluctuation are less than ±1.7% and ±3.2%.展开更多
The Malaysian government launched the Government Linked Companies Transformation （GLCT） Programme in May 2004, with the aim, amongst others, of ensuring continuous improvement of these firms amidst global trade comp...The Malaysian government launched the Government Linked Companies Transformation （GLCT） Programme in May 2004, with the aim, amongst others, of ensuring continuous improvement of these firms amidst global trade competitiveness and economic challenges. This paper examines technical efficiency of government linked companies （GLCs） and benchmarks the result with top foreign owned firms listed in Bursa Malaysia. The study employs an unbalanced panel dataset of 31 existing GLCs over a period of nine years （2000-2008） using the stochastic frontier model. The results provide estimates of mean technical efficiency of these firms for the first time, and highlight the variation between the GLCs and foreign owned firms which represent international standard. The findings show mean technical efficiency of GLCs is moving towards the frontier but it still relatively low compared to the foreign firms. The trend declined drastically at the later period showing a wider gap against the benchmark firms. The findings hope to contribute to the growing literature on firms＇ efficiency focusing on privatized firms in developing countries.展开更多
Autism spectrum disorder(ASD) is diagnosed on the basis of core impairments in pragmatic language skills, which are found across all ages and subtypes. In contrast, there is significant heterogeneity in language pheno...Autism spectrum disorder(ASD) is diagnosed on the basis of core impairments in pragmatic language skills, which are found across all ages and subtypes. In contrast, there is significant heterogeneity in language phenotypes, ranging from nonverbal to superior linguistic abilities, as defined on standardized tests of vocabulary and grammatical knowledge. The majority of children are verbal but impaired in language, relative to age-matched peers. One hypothesis is that this subgroup has ASD and co-morbid specific language impairment(SLI). An experiment was conducted comparing children with ASD to children with SLI and typically developing controls on aspects of language processing that have been shown to be impaired in children with SLI: repetition of nonsense words. Patterns of performance among the children with ASD and language impairment were similar to those with SLI, and contrasted with the children with ASD and no language impairment and typical controls, providing further evidence for the hypothesis that a subgroup of children with ASD has co-morbid SLI. The findings are discussed in the context of brain imaging studies that have explored the neural bases of language impairment in ASD and SLI, and overlap in the genes associated with elevated risk for these disorders.展开更多
文摘Based on the measurement of dispersion characteristic and birefractive index of the fluorinated polyimide film,a statistical optimum design method is proposed and used to realize the design of 32- and 36-wavelengths optical waveguide wavelength-interleave coupler(i,e.,interleaver) with the optimization of polarization fluctuation and wavelength interval of 0.8 nm at 1 550 nm.The largest cross coupling ratios of the two interleavers are respectively less than 1.8% and 3.5%,while the least through coupling ratios are respectively greater than 98.2% and 96.5%.The output differences due to polarization fluctuation are less than ±1.7% and ±3.2%.
文摘The Malaysian government launched the Government Linked Companies Transformation （GLCT） Programme in May 2004, with the aim, amongst others, of ensuring continuous improvement of these firms amidst global trade competitiveness and economic challenges. This paper examines technical efficiency of government linked companies （GLCs） and benchmarks the result with top foreign owned firms listed in Bursa Malaysia. The study employs an unbalanced panel dataset of 31 existing GLCs over a period of nine years （2000-2008） using the stochastic frontier model. The results provide estimates of mean technical efficiency of these firms for the first time, and highlight the variation between the GLCs and foreign owned firms which represent international standard. The findings show mean technical efficiency of GLCs is moving towards the frontier but it still relatively low compared to the foreign firms. The trend declined drastically at the later period showing a wider gap against the benchmark firms. The findings hope to contribute to the growing literature on firms＇ efficiency focusing on privatized firms in developing countries.
基金supported by the National Institutes of Health(Grant Nos.U19 DC03610,RO1 DC 10290,and M01 RR00533)
文摘Autism spectrum disorder(ASD) is diagnosed on the basis of core impairments in pragmatic language skills, which are found across all ages and subtypes. In contrast, there is significant heterogeneity in language phenotypes, ranging from nonverbal to superior linguistic abilities, as defined on standardized tests of vocabulary and grammatical knowledge. The majority of children are verbal but impaired in language, relative to age-matched peers. One hypothesis is that this subgroup has ASD and co-morbid specific language impairment(SLI). An experiment was conducted comparing children with ASD to children with SLI and typically developing controls on aspects of language processing that have been shown to be impaired in children with SLI: repetition of nonsense words. Patterns of performance among the children with ASD and language impairment were similar to those with SLI, and contrasted with the children with ASD and no language impairment and typical controls, providing further evidence for the hypothesis that a subgroup of children with ASD has co-morbid SLI. The findings are discussed in the context of brain imaging studies that have explored the neural bases of language impairment in ASD and SLI, and overlap in the genes associated with elevated risk for these disorders.
