Microring-Assisted Coupling Between Dissimilar Waveguides

The use of microring resonators to assist in the evanescent field coupling between dissimilar waveguides is proposed and analyzed. Theoretical analysis based on the coupled mode theory and nu-merical example show that complete cross power transfers can be obtained near the microring resonances. Applications of the device include power dividers, low-power thermo-optic or electro-optic switches, and modulators.     

Effect of removal of the Harderian glands on pineal melatonin concentrations in the Syrian hamster

Summary Peak melatonin levels which are normally present in male Syrian hamsters at 8 h after the onset of darkness in animals maintained under a lightdark cycle of 1410, were significantly decreased following the removal of the Harderian glands.Supported by NSF grant PCM 77-05734.     

Effect of removal of the Harderian glands on pineal melatonin concentrations in the Syrian hamster.

Peak melatonin levels which are normally present in male Syrian hamsters at 8 h after the onset of darkness in animals maintained under a light:dark cycle of 14:10, were significantly decreased following the removal of the Harderian glands.     

彩色多普勒超声在腹壁下动脉穿支选择中的应用

验证彩色多普勒超声对腹壁下动脉穿支血管术前探查的有效性,寻找腹壁下动脉穿支术前优势穿支的选择标准。利用彩色多普勒超声探查腹壁下动脉穿支皮瓣行乳房再造患者52例,重点记录穿支血管穿腹直肌前鞘点的体表投影、口径、血流信息,并通过分析比较以上信息,选择优势穿支。结果52例患者腹壁下动脉穿支穿腹直肌前鞘点于超声下均可显示,平均每侧下腹部3支,距脐平均(5.7±2.09)cm,其中条件适用于显微外科的穿支平均口径(0.95±0.32)cm,血流峰速平均约16.4 cm/s,阻力指数平均0.7。术中优势穿支采用率92.31%。说明高频彩色多普勒超声适用于腹壁下动脉穿支皮瓣术前血管探查,可精确指导穿支的术前选择,辅助手术方案制定以及皮瓣设计。     

Photoreceptive net in the mammalian retina. This mesh of cells may explain how some blind mice can still tell day from night

We have discovered an expansive photoreceptive 'net' in the mouse inner retina, visualized by using an antiserum against melanopsin, a likely photopigment. This immunoreactivity is evident in a subset of retinal ganglion cells that morphologically resemble those that project to the suprachiasmatic nucleus (SCN), the site of the primary circadian pacemaker. Our results indicate that this bilayered photoreceptive net is anatomically distinct from the rod and cone photoreceptors of the outer retina, and suggest that it may mediate non-visual photoreceptive tasks such as the regulation of circadian rhythms.     

Acute effects of unilateral or bilateral superior cervical ganglionectomy on rat pineal N-acetyltransferase activity and melatonin content.

Acute bilateral superior cervical ganglionectomy (SCGX) completely prevents the nocturnal rises in pineal N-acetyltransferase (NAT) activity and melatonin content in male rats kept in light-dark cycles of 14:10. Unilateral SCGX causes the NAT and melatonin levels to be intermediate between those in sham-operated control rats and those in rats from which both ganglia had been removed.     

Acute effects of unilateral or bilateral superior cervical ganglionectomy on rat pineal N-acetyltransferase activity and melatonin content

Summary Acute bilateral superior cervical ganglionectomy (SCGX) completely prevents the nocturnal rises in pineal N-acetyltransferase (NAT) activity and melatonin content in male rats kept in light-dark cycles of 1410. Unilateral SCGX causes the NAT and melatonin levels to be intermediate between those in sham-operated control rats and those in rats from which both ganglia had been removed.Supported by NSF, grant No. PCM 77-05734.     

Effective Approach to Elevate the Intelligence of Management Decision System

Based on the sticking point of the low intelligence of the existing management decision system, this paper puts forward the idea of enriching and refining the knowledge of the system and endowing it with the ability to learn by means of adopting three types of heterogeneous knowledge representation and knowledge management measures. At length, this paper outlines the basic framework of an intelligence system for the sake of management decision problem.     

Simulation and uniform design-based automatic generation of risk scenarios

This paper presents a methodology for automatically generating risk scenarios for dynamic reliability applications in which some dynamic characteristics(e.g.,the order,timing and magnitude of events,the value of relevant process parameters and initial conditions) have a significant influence on the evolution of the system.The main idea of the methodology is:(i) making the system model "express itself" through simulation by having the model driven by an elaborated simulation engine;(ii) exploiting uniform design to pick out a small subset of representative design points from the space of relevant dynamic characteristics;(iii) for each selected design point,employing a depth-first systematic exploration strategy to cover all possible scenario branches at each branch point.A highly dynamic example adapted from the literature(a chemical batch reactor) is studied to test the effectiveness of the proposed methodology.