论驯鹿鄂温克人的兽皮文化

生活在大兴安岭中的驯鹿鄂温克人是鄂温克族中的独特群体,千百年来一直以饲养驯鹿和森林游猎为生。他们在特定的自然环境、特殊的生存条件以及特有的生产生活中,创造出了适合于他们物质文明和精神文明的兽皮文化。     

Conditional interval estimation of the mean following rejection of a two sided test

The effect of rejecting a two-sided preliminary test of significance for the mean of a normal distribution upon subsequent interval estimation of the mean is examined. For the case where the variance is known, conditional confidence intervals may be shorter than unconditional intervals, in contrast to the one-sided preliminary test case examined by Meeks and D’Agostino (1983, The American Statistician, 7, 134-136) . For the case where the variance is unknown and must be estimated by the sample variance, it is shown that customary intervals do not offer uniformly greater or lesser coverage than the nominal level.     

Gender and racial inequities in retirement resources

Two waves of a Social Security Beneficiary survey were analyzed to consider differences in the retirement resources of women and men based on marital status and race/ethnicity. Despite increased workforce participation the economic situation of single women, including white women, worsened over time. A bifurcation in retirement resources was found, with men relying more on private income sources and women depending more on Social Security. Current retirement policies based on privatization will continue to adversely impact women who work at low-paying jobs, receive lower wages, and live longer than men.     

Alcoholism: The quest for transcendence and meaning

A vigorous and long standing argument continues in an effort to define the etiology of alcoholism and prescribe its treatment. Each sideaadvances its cause by challenging the other's efficacy. However, none of the prevalling responses to alcoholism is very effective. Fighting on the ideological battlefield of western science results in a sterile understanding of alcoholism and provides social workers little information to help them understand the experience of alcoholism and the complexities of recovery. The experience of alcoholism is profound. More than a bad habit or a disease, alcoholism is an attempt to give life meaning, to assuage existential dilemmas. Effective recovery from alcoholism occurs when clients learn to disengage from their relationship with alcohol and give their lives a new sense of meaning. Sources of knowledge outside empirical science offer important principles to help workers facilitate recovery.     

The relationship of social support and economic self-sufficiency to substance abuse outcomes in a long-term recovery program for women.

A growing literature suggests that women experience chemical dependency in a very different manner than men. Their needs in treatment may also vary. In particular, women with low incomes face greater economic hardship, and may be more subject to the influence of social support in maintaining recovery. Despite evidence for the relationship of both employment and social support in substance abuse treatment outcomes, many programs are reducing services and lengths of stay. The authors explored outcomes for fifty-nine women who attended long-term substance abuse treatment in a womens' facility that emphasized employment and economic self-sufficiency. Reductions in substance use were associated with an increase in economic autonomy. Improvement in other life domains was positively associated with measures of economic self-sufficiency. Women living in drug-free social environments had higher rates of abstinence and better overall functioning. At least among women who participated in our study, economic outcomes, substance use, and general functioning went hand-in-hand. Eliminating services such as employment assistance may, while reducing cost, also negatively impact outcomes among the most vulnerable clientele.     

A non-linear mixed-effects model to predict cumulative bole volume of standing trees

For purposes of forest inventory and eventual management of the forest resource, it is essential to be able to predict the cumulative bole volume to any stipulated point on the standing tree bole, while requiring measurements of tree size that can be made easily, quickly and accurately. Equations for this purpose are typically non-linear and are fitted to data garnered from a sample of felled trees. Because the cumulative bole volume of each tree is measured to numerous upper-bole locations, correlations between measurements within a tree are likely. A mixed-effects model is fitted to account for this within-subject (tree) correlation structure, while also portraying the sigmoidal shape of the cumulative bole volume profile.     

Confidence intervals and significance tests for a single trial

Confidence intervals are developed for the location parameter of a continuous, symmetric, unimodal distribution in the casev where only a single observation from the distribution is available. These intervals are similar to those given by Abbott and Rosenblatt (1963), but shorter. The result is extended to include distributions which can be standardized to have unit scale. The procedure is exemplified for the normal distribution and the power of one- and two-sided significance tests are computed under normality.