Does one size fit all African American smokers? The moderating role of acculturation in culturally specific interventions.

There is a consensus that interventions for ethnic minority populations should be culturally specific (CS). A previous study found that although African American smokers indicated a preference for CS self-help materials over standard materials, several outcomes were superior for the standard information (Webb, 2008). The current study reports on a priori analyses that tested level of acculturation as a moderating variable for the efficacy of CS interventions in a sample of low-income African Americans. Participants (N = 182) completed the African American Acculturation Scale--Revised before receiving a CS smoking cessation guide or a standard guide. As hypothesized, level of acculturation predicted evaluations of the intervention content, readiness to quit smoking, and 24-hr point prevalence abstinence at the 3-month follow-up. Lower levels of acculturation (i.e., more engagement in traditional African American culture) predicted a preference for CS materials and greater readiness to quit smoking after receiving the CS guide. Yet, among participants who were less acculturated, 24-hr abstinence was greater after receiving the standard guide. Overall, these findings emphasize that individual differences in levels of acculturation to the dominant culture affect receptivity to CS written interventions. Intragroup differences should be considered prior to the provision of CS interventions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The development of ethnic identity during adolescence.

The development of ethnic identity is a critical facet of adolescence, particularly for adolescents of color. In order to examine the developmental trajectory of ethnic identity, African American, Latino American, and European American early and middle adolescents (N=420) were assessed over 3 years. Two components of ethnic identity were assessed--group-esteem was found to rise for both early and middle adolescents; exploration rose for middle adolescents. African Americans and Latino Americans were lower in group-esteem but have greater increases than European Americans, particularly across a school transition. The course of ethnic identity development during early and middle adolescence, the role of school context, and the variability in developmental trajectories among racial and ethnic groups are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cultural validity of the Almost Perfect Scale--Revised for African American college students.

This study investigated the cross-cultural construct validity of perfectionism using the Almost Perfect Scale-Revised (APS-R; R. B. Slaney, M. Mobley, J. Trippi, J. S. Ashby, & D. G. Johnson, 1996) with 251 African American college students. A LISREL confirmatory factor analysis (CFA) offered support for the 3 subscales of the APS-R: High Standards, Order, and Discrepancy. Multigroup CFA results for a sample of 314 White college students supported factorial equivalence across the 2 cultural groups. Correlations between the subscales of the APS-R and measures of self-esteem, self-reported grade point average (GPA), satisfaction with GPA, trait anxiety, and depression were consistent with the results of previous research. A cluster analysis was performed on the APS-R; the cluster results were similar to those found in previous studies. Finally, the limitations of the present study and the implications for future research with African Americans are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sexual risk among African American girls: Psychopathology and mother–daughter relationships.

Objective: To examine the associations among mental health problems, maternal monitoring and permissiveness, mother–daughter communication and attachment, and sexual behaviors among African American girls receiving outpatient psychiatric care. Youths with mental health problems report higher rates of HIV-risk behavior than do their peers, and African American girls have higher rates of sexually transmitted infections than do girls of all other racial groups. Method: A sample of 12- to 16-year-old African American girls (N = 266, mean age = 14.46 years) and their female caregivers (73% biological mothers) completed computerized assessments of girls' mental health symptoms, maternal monitoring and permissiveness, and mother–daughter communication and attachment. Girls indicated their sexual risk behaviors (vaginal/anal sex, consistent condom use, number of partners). Results: African American girls who reported clinically significant externalizing problems, more permissive parenting, less open mother–daughter sexual communication, and more frequent mother–daughter communication were more likely to report having had vaginal and/or anal sex. Sexually active girls with greater maternal attachment were less likely to report inconsistent condom use. Conclusions: Findings revealed important risk and protective factors for African American girls in psychiatric care. HIV-prevention programs may be strengthened by improving mother–daughter relationships and communication and by reducing girls' mental health problems. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Rapid Visible Detection of African Swine Fever Virus Using Hybridization Chain Reaction-Sensitized Magnetic Nanoclusters and Affinity Chromatography

African swine fever virus (ASFV) is a severe and persistent threat to the global swine industry. As there are no vaccines against ASFV, there is an immense need to develop easy-to-use, cost-effective, and rapid point-of-care (POC) diagnostic platforms to detect and prevent ASFV outbreaks. Here, a novel POC diagnostic system based on affinity column chromatography for the optical detection of ASFV is presented. This system employs an on-particle hairpin chain reaction to sensitize magnetic nanoclusters with long DNA strands in a target-selective manner, which is subsequently fed into a column chromatography device to produce quantitatively readable and colorimetric signals. The detection approach does not require expensive analytical apparatus or immobile instrumentation. The system can detect five genes constituting the ASFV whole genome with a detection limit of ≈19.8 pm in swine serum within 30 min at laboratory room temperature. With an additional pre-amplification step using polymerase chain reaction (PCR), the assay is successfully applied to detect the presence of ASFV in 30 suspected swine samples with 100% sensitivity and specificity, similar to quantitative PCR. Thus, this simple, inexpensive, portable, robust, and customizable platform for the early detection of ASFV can facilitate the timely surveillance and implementation of control measures.     

Multi-objective-derived energy efficient routing in wireless sensor networks using hybrid African vultures-cuckoo search optimization

Wireless Sensor Network (WSN) plays an essential role in consumer electronics, remote monitoring, an electromagnetic signal, and so forth. The functional capacity of WSN gets enhanced everyday with different technologies. The rapid development of wireless communication, as well as digital electronics, provides automatic sensor networks with low cost and power in various functions, but the challenge faced in WSN is to forward a huge amount of data between the nodes, which is a highly complex task to provide superior delay and energy loss. To overcome these issues, the development of a routing protocol is used for the optimal selection of multipath to perform efficient routing in WSN. This paper developed an energy-efficient routing in WSNs utilizing the hybrid meta-heuristic algorithm with the help of Hybrid African Vultures-Cuckoo Search Optimization (HAV-CSO). Here, the designed method is utilized for choosing the optimal cluster heads for progressing the routing. The developed HAV-CSO method is used to enhance the network lifetime in WSN. Hence, the hybrid algorithm also helps select the cluster heads by solving the multi-objective function in terms of distance, intra-cluster distance, delay, inter-cluster distance, throughput, path loss, energy, transmission load, temperature, and fault tolerance. The developed model achieved 7.8% higher than C-SSA, 25.45% better than BSO-MTLBO, 23.21% enhanced than AVOA, and 1.29% improved than CSO. The performance of the suggested model is validated, and the efficacy of the developed work is proved over other existing works.     

赞比亚谦比西铜矿矿床成因研究及其找矿意义

谦比西铜矿是中非成矿带上的一个典型的同生沉积矿床,文章分别从Ⅸ域和矿区的地层、构造、矿物组合及矿化分带等方面介绍该铜矿的矿床特征,并浅析矿床成因,希望拓宽找矿思路,认识该成矿带成矿规律对预测和寻找相关类型矿床会有帮助.