The nature of the pi1 colour mechanism of W.S. Stiles

The ppi1 colour mechanism was isolated by means of Stile's auxiliary field technique: that it is pi1 which is isolated is proven by both test and field action spectra. 2. The fundamental mechanisms of human trichromatic colour vision must satisfy Grassman's law of additivity. The hypothesis that pi1 is one of the three fundamentals is tested by experiments in which pairs (u1, u2) of monochromatic adapting fields are mixed 3. When two fields with wave-lengths in the neighbourhood of its primary mode (mu1, mu2 less than or equal to 500 nm) are combined, pi1 is field-additive, consistent with the hypothesis that this portion of the pi1 action spectrum is that of the short-wave-length-sensitive photoreceptors. 4. When a short-wave-length adaptation field (mu1 less than or equal to 500 nm) is mixed with a longer wave-length field (mu2 greater than or equal 550 nm) i1 is strongly non-additive. This result proves that the long-wave-length portion of the pi1 field spectrum is generated at least in part by a signal originating in the long- or middle-wave-length sensitive cones. 5. Analysis of the additivity failures supports a model of pi1 in which the signal to be detected is generated in the short-wave-length cones, and must pass serially through two gain stages: the gain in the first stage is controlled by the short-wave-length cones alone; the gain in the second stage is controlled by a signal originating in the middle, or long-wave-length cones, or both.     

Sources of several errors in DNA cytofluorimetry

It was shown that serious errors in DNA cytofluorimetry may be due to incorrect illumination of photocathode of the photomultiplier in the cytofluorimeters and non-observance of the requirements to the nuclear structures of the cells under measurement with respect to their chemical integrity and thickness. The methods of the optimal illumination of photocathode in the cytofluorimeters and the criteria of selection of the nuclear structures on slides are considered with the aim of obtaining the objective results of DNA cytofluorimetry.     

Oral premedication: diazepam, metoclopramide and a drink

A technique of premiedication using oral diazepam and metoclopramide with a drink is described and shown to provide better sedation and less vomiting than pethidine and atropine given intramuscularly without a drink to a group of similar patients.     

Fluctuations in tap water fluoride levels: a potential problem for practitioners

Prior to the early 1980s, two Winnipeg hospitals provided hemodialysis for all patients in Manitoba with chronic renal failure. Because no other hemodialysis centres existed, families were forced to relocate to the city. Because of these factors, the Manitoba Renal Failure Advisory Committee proposed the development of an outreach hemodialysis program. Under the auspices of the Health Sciences Centre in Winnipeg, this outreach program has evolved into the current Manitoba Local Centre Dialysis Program. Hemodialysis services are now available in an additional seven health care centres throughout Manitoba and northwestern Ontario. This program has benefited many and in some instances, families previously separated by distances of up to 500 miles have been reunited. Creativity has been one of the most essential ingredients in the evolution of this unique program.     

Queueing analysis of buffered slotted multiple access protocols

Much of the literature on the performance evaluation of multiple access protocols has assumed a buffer capacity of one unit. This assumption is not realistic. In practice the buffer capacities used are larger than one unit in order to reduce the probability of packet rejection. This is more crucial for multiple access protocols, which allow moderate to high values of the expected throughput (URN, Random TDMA etc.).In this paper, a model appropriate for the analysis of buffered slotted multiple access schemes is proposed. The method can be applied to several multiple access protocols such as the URN protocol, the ALOHA protocol, Random TDMA etc. The cases of infinite and finite buffer capacity are examined separately but under the same basic assumptions. The analysis is based on the assumption that each user process can be modelled as an M/G/1 queueing system. The proposed method requires a small amount of computation and is characterized by a high speed, a fact that simplifies the buffer's design as well. The solution obtained is extremely accurate and exhibits excellent agreement with simulation results, which corroborate the accuracy of the model. The special case when the buffer capacity is equal to 1 is examined. In that case, the present approach also allows for computation of the packet delay distribution.     

光纤传感器中曲线拟合的应用及研究

从最小二乘法基本原理出发进行曲线拟合,结合实例介绍在无数学模型的情况下拟合光纤传感器系统特性函数,并用Matlab对拟合函数进行回归分析,修正拟合函数,使传感器特性拟合曲线达到理论要求。     

高温SO I CMO S 倒相器瞬态特性的研究

本文主要研究高温SOI CMOS倒相器在（27－300℃）宽温区的瞬态特性。研究结果表明：当采用N^ PN^ 和P^＋PP^ 结构薄膜SOI MOSFET组合，并且其结构参数满足高温应用的要求，则SOI CMOS倒相器实验样品在（27－300℃）具有良好的高温瞬态特性。     

扭摆式微硅隧道加速度传感器

本文介绍了扭摆式隧道加速度传感器的结构、工作原理、简化的力学模型,设计了版图、工艺流程及关键工艺,并制备出样品,最后给出测试电路和结果。