The statistical variability of blood alcohol concentration measurements in drink-driving cases

Like many other places in the world, Hong Kong has drink-driving legislation which prohibits a driver from having in his blood alcohol exceeding a prescribed limit while in control of a motor vehicle. The accuracy of measuring this alcohol concentration is obviously of prime concern as an erroneous result can avert the administration of justice. The common practice is to deduct all errors from the measured value and compare the deducted value with the prescribed limit, so that the benefit of all errors of the measurement is given to the driver. It is therefore important for any laboratory responsible for measuring blood alcohol concentrations to identify and quantify all errors associated with the measurement. The present study examined 900 blood alcohol determinations carried out by the Hong Kong Government Laboratory (HKGL) on cases of suspected drink driving. The determinations were performed by 5 different analysts with two different sets of instruments during 1995-1997. Statistical analysis indicated that the instruments had no bearing on the random error or variability and that even though analyst was a significant factor on variability, the deviation from the mean so caused was only 0.3% and of no practical significance. When the systematic error introduced by the tolerance limits of the certified alcohol standards (purchased from the Laboratory of Government Chemists, UK) was taken into account, the total uncertainty (random plus systematic errors) of an alcohol determination at 99.5% confidence level was found to be 4%. It is recommended that laboratories engaged in blood alcohol determination should adopt similar statistical treatment of their analytical results to find out the error and to ensure that the results are independent of analyst and instrument used.     

Weight force during prone restraint and respiratory function

Prone maximal restraint position (PMRP, also known as hogtie or hobble) is often used by law enforcement and prehospital personnel on violent combative individuals in the field setting. Weight force is often applied to the restrained individual's back and torso during the restraint process. We sought to determine the effect of 25 and 50 lbs weight force on respiratory function in human subject volunteers placed in the PMRP. We performed a randomized, cross-over, controlled trial on 10 subjects placed in 4 positions for 5 minutes each: sitting, PRMP, PRMP with 25 lbs weight force (PMRP+25), and PRMP with 50 lbs weight force placed on the back (PMRP+50). We measure pulse oximetry, end-tidal CO2 levels, and forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1). FVC and FEV1 were significantly lower in all restraint positions compared with sitting but not significantly different between restraint positions with and without weight force. Moreover, mean oxygen saturation levels were above 95% and mean end-tidal CO2 levels were below 45 mm Hg for all positions. We conclude that PMRP with and without 25 and 50 lbs of weight force resulted in a restrictive pulmonary function pattern but no evidence of hypoxia or hypoventilation.     

The 1998 State Council Organizational Streamlining: Personnel reduction and change of government function

The two goals of the 1998 State Council organizational streamlining were personnel reduction and a change of government functions. It is argued that the methods being used to achieve personnel reduction do not constitute a real reduction but largely involve transferring staff to other public institutions. Real personnel reduction could not be achieved without a major change of government function. Institutional reforms of both the central and local governments since the 1980s have been adaptations to the changing economic structure from a planned to a market economy. Government functions have served both existing economies. Cadres cannot be reduced unless the government function of direct management of state-enterprises is completely severed. The major contents of the 1998 institutional reform are examined and evaluated. The prospects for the success of the reform are also assessed.     

博弈视角下农地流转与农民利益保障机制探析

农地流转制度在巩固存量利益的同时,也带来了可观的增量利益,各个利益主体为分配新增利益势必会展开激烈的竞争和角逐.运用博弈论系统分析利益主体之间的博弈关系,透视现实制度实行中其他利益主体对农民利益的侵害.在策略选择上从宏观、中观和微观角度着力构建三位一体利益保障机制,矫正农地流转利益博弈中的力量失衡状态,促使农民的存量利益能够得到对价支付,确保农民能够公平参与增量利益的分配.     

毛泽东农地政策思想研究

毛泽东农地思想的主线一直都是坚持农地的国有化,中间经历了短暂的私有化阶段,是出于对当时中国国情的具体考量,在1953年,也就是解放后不到四年的时间,正式开始了农地公有制进程,而毛泽东的农地思想的变化,始终是为了发展生产力,解决中国农村的生产力与生产关系的矛盾的需要。     

新加坡的医疗保障体系

新加坡医疗保障体系以其投入低、效率高为世人所称道。文章介绍了新加坡医疗保障体系的筹资和医疗服务供给系统，并对其进行公平和效率评估，认为新加坡医疗体制的成功实际上并不能归功于医疗个人账户制度，而是源于其内设的对低收入者就医的补贴制度和个人自付费用对医疗服务消费的控制。     

Distribution of morphine in body fluids and tissues in fatal overdose

Two cases of fatal overdose with morphine are presented. Large amounts of the drug were involved in both cases, one by oral ingestion, the other by intravenous injection. Morphine concentrations in various body fluids and tissues are compared to those in the literature.