头发翻新术 柔顺可以重来

我们对于发型永远是勇于尝新的,爆炸卷、数码烫、还有漂色再染……当然反复折腾的代价就是头发枯了,柔顺没了,大部分人也只能顶着枯黄分叉的头发＂守旧＂下去。头发也可以翻新,翻新头发的技巧你懂了吗？     

汉方美容,最IN的自我养护大淘宝

安全回归最热门的汉方美容 肌肤泡在化学的海洋里颤颤危危,保不准还赔上健康本钱.只养不伤的汉方成分纯粹自然,许多国际上呼风唤雨的大牌都已经挪为己用,我们为什么不把自家宝贝回归到手上来?     

Optimal correction for continuity in the chi-squared test in 2×2 tables

The most common asymptotic procedure for analyzing a 2 × 2 table (under the conditioning principle) is the ‰ chi-squared test with correction for continuity (c.f.c). According to the way this is applied, up to the present four methods have been obtained: one for one-tailed tests (Yates') and three for two-tailed tests (those of Mantel, Conover and Haber). In this paper two further methods are defined (one for each case), the 6 resulting methods are grouped in families, their individual behaviour studied and the optimal is selected. The conclusions are established on the assumption that the method studied is applied indiscriminately (without being subjected to validity conditions), and taking a basis of 400,000 tables (with the values of sample size n between 20 and 300 and exact P-values between 1% and 10%) and a criterion of evaluation based on the percentage of times in which the approximate P-value differs from the exact (Fisher's exact test) by an excessive amount. The optimal c.f.c. depends on n, on E (the minimum quantity expected) and on the error α to be used, but the rule of selection is not complicated and the new methods proposed are frequently selected. In the paper we also study what occurs when E ≥ 5, as well as whether the chi-squared by factor (n-1).     

Associational Performance: The Influence of Cohesion, Decision-Making, and the Environment

The importance of associations in contemporary democratic societies is out of the question. Still, there is a need for a new approach that considers them as a specific and singular organization type, different from business firms and government agencies. There is also a need to evaluate their performance. Based on case studies and diverse theoretical insights, this article lays out some criteria for assessing the effects on associational performance of cohesion, decision-making and relation to environment.     

Examining Protective Factors for Dysthymia Among Individuals Attending Substance Abuse Treatment

ABSTRACT

Dysthymia affects millions of people and has been associated with impaired psychosocial and occupational functioning and poor clinical treatment outcomes. Yet few studies have examined protective factors that can be utilized to help individuals with dysthymia in clinical settings, particularly among individuals with comorbid substance use disorders. The purpose of this study was to examine the potential protective quality of adult attachment dimensions, spirituality, and meaning in life among clients with and without dysthymia in treatment for addiction. Data were obtained from 305 self-report questionnaires administered to clients attending a residential substance abuse treatment center. Approximately 25% of the sample met criteria for dysthymia. Results from logistic regression analyses indicated that purpose and meaning in life and attachment anxiety were the most important protective factors against having dysthymia. These results suggest that mental health professionals may need to integrate these protective factors into the treatment of individuals with dysthymia and substance use disorders, which may enhance treatment outcomes and maximize treatment effectiveness. Future studies should continue to explore protective factors that can assist individuals who experience these comorbid conditions and consider replicating this study using an ethnically diverse sample and other clinical settings to determine the generalizability of the findings.     

Confidence Intervals of Weighted Kappa Coefficient of a Binary Diagnostic Test

Sensitivity and specificity are classic parameters to assess the performance of a binary diagnostic test. Another useful parameter to measure the performance of a binary test is the weighted kappa coefficient, which is a measure of the classificatory agreement between the binary test and the gold standard. Various confidence intervals are proposed for the weighted kappa coefficient when the binary test and the gold standard are applied to all of the patients in a random sample. The results have been applied to the diagnosis of coronary artery disease.