多媒体处理器MSM7227及其在智能手机中的应用

本文简要介绍了多媒体处理器MSM7227的特点,包括运算速度、图像处理、安全以及丰富的硬件资源。详细介绍了基于多媒体处理器MSM7227的嵌入式硬件系统。通过系统结构、存储设备、电源管理、音频处理、图像视频和其它外围电路的顺序,阐述了多媒体处理器MSM7227在智能手机中应用的设计思路和实现方法。     

MSM7512B在数据传输中的应用

文章详细介绍了调制解调芯片MsM7512B的功能特点、外部引脚、内部结构、工作特性、工作模式等,并在随后部分中详细介绍了其在数据传输中的应用,并给出了相应的硬件及软件实现方法,最后通过芯片的调制解调功能实现信号的传输.     

Online News Coverage of Preexposure Prophylaxis

Human immunodeficiency virus, or HIV continues to be a serious issue, especially for men who have sex with men (MSM). A new means of HIV prevention, called preexposure prophylaxis (PrEP), significantly reduces the chance of HIV infection. However, adoption of the drug has been slow. In this study, a content analysis of 234 online news articles about PrEP from popular U.S. news Web sites was conducted, focusing on how articles were framed in terms of benefits to PrEP, barriers to PrEP, the severity of HIV, and the susceptibility of MSM to HIV. Results showed that coverage contained conflicting information about PrEP and failed to cast HIV as a serious problem.     

Sex and sexual orientation disparities in adverse childhood experiences and early age at sexual debut in the United States: Results from a nationally representative sample

Adverse childhood experiences (ACEs) have been linked to early sexual debut, which has been found to be associated with multiple adverse health outcomes. Sexual minorities and men tend to have earlier sexual debut compared to heterosexual populations and women, respectively. However, studies examining the association between ACEs and early sexual debut among men and sexual minorities are lacking. The aim of this study was to examine the sex and sexual orientation disparities in the association between ACEs and age at sexual debut. Data were obtained from Wave 2 of the National Epidemiologic Survey on Alcohol and Related Conditions. Logistic and linear regression models were used to obtain crude and adjusted estimates and 95% confidence intervals adjusting for age, race/ethnicity, income, education, insurance and marital status for the association between ACEs (neglect, physical/psychological abuse, sexual abuse, parental violence, and parental incarceration and psychopathology) and early sexual debut. Analyses were stratified by sex and sexual orientation. Larger effect estimates depicting the association between ACEs and sexual debut were seen for women compared to men, and among sexual minorities, particularly among men who have sex with men (MSM) and women who have sex with women (WSW), compared to heterosexuals. Sexual health education programs with a focus on delaying sexual debut among children and adolescents should also consider addressing ACEs, such as neglect, physical, psychological and sexual abuse, witnessing parental violence, and parental incarceration and psychopathology. Public health practitioners, researchers and sexual health education curriculum coordinators should consider these differences by sex and sexual orientation when designing these programs.     

Early life emotional neglect and HIV risk taking among men using the Internet to find other men for unprotected sex

Purpose: Using a Syndemics Theory conceptual model, this study examines the relationship between emotional neglect experiences during childhood and/or adolescence and involvement in HIV risk taking in a sample of adult men who actively seek partners for unprotected sex via the Internet. Methods: The study was based on a national random sample of 332 MSM who use the Internet to seek men with whom they can engage in unprotected sex. Data collection was conducted via telephone interviews between January 2008 and May 2009. Structural equation analysis was undertaken to examine the specific nature of the relationships involved in understanding HIV risk practices. Results: Emotional neglect was highly prevalent among the men participating in this study. Emotional neglect experiences were not found to be related directly to involvement in HIV risk taking in adulthood. Emotional neglect, was found to be an important variable in the overall structural equation. Its effect on HIV risk taking was indirect, operating principally by having a negative impact upon self-esteem, which in turn had a negative effect on attitudes toward condom use, which in turn were related strongly and directly to risk taking. Conclusions: Childhood experiences with emotional neglect are relevant to understanding HIV risk practices among MSM in adulthood, but the relationship is not as simple as usually conceptualized. Rather, emotional neglect appears to impact risk taking indirectly, through its effects on mental health functioning, which in turn affects risk-related attitudes.