世界各国聚焦氢能源经济

氢是宇宙中最丰富的元素，地球上分布着大量的氢，其来源丰富。氧还是元素周期表中最轻的一个元素，与其他物质相比，具有较高的重量比能量。氢的燃烧产物是水，非常清洁，不会对环境造成污染。因此人们对氢能源的开发与利用也产生了极大的兴趣。     

Race,Rural Residence,and Wildland Visitation: Examining the Influence of Sociocultural Meaning1

Abstract Previous studies have shown that African Americans have less favorable impressions about wildlands and recreate on wildland areas less frequently than do whites. However, most of these investigations have been conducted on non-rural populations. Rural perceptions of wildlands and visitation to such areas have received relatively little attention. In this exploratory study, we propose that race operates on wildland recreation visitation through the different meanings rural blacks and whites attribute to wildlands. We examine this hypothesis with a structural model which specifies wildland meaning as an intervening factor between race and visitation. Single equation results show blacks visit wildlands less, and have less favorable definitions of wildlands, compared to whites. However, when wildland meaning is included in the structural model, racial differences become insignificant. This suggests that the meanings different racial groups attach to wildlands help explain visitation. Both sex and age are also significant predictors of both wildland meaning and visitation.     

Media,fear, and nuclear energy: A case study

Although electricity generation technologies and safety have improved gradually over time, nuclear power, including generation facilities and waste repositories, are seemingly stigmatized in American culture. Contemporary literature has considered the impact of widely broadcasting nuclear accidents and how media coverage might alter public risk perceptions and in turn, U.S. nuclear policy. This paper discusses the vacillation of public support in recent decades and its ties to both media and scientific reporting. The analysis identifies how media coverage of accidents at Chernobyl, Three-Mile Island, and Fukushima overwhelmed scientific claims of safety and security in nuclear energy production. Additionally, the discussion considers how to bridge the information gap between scientists, citizens, and policymakers through increased knowledge dissemination. Finally, the implications of improved scientific communication in democratic policymaking processes are discussed.     

Preparing Social Workers to Identify and Integrate Culturally Affirming Bibliotherapy into Treatment

Despite gains in redefining America as a ‘salad bowl’ versus a ‘melting pot’, stereotypes about racial and ethnic minorities, including African Americans, remain embedded in the fabric of the United States. By acknowledging the significance of stereotypes, race, and culture on the lives of clients, culturally affirming bibliotherapy is a tool that can empower them, validate their experiences, and promote the development of a positive self‐identity or self‐concept. This paper focuses on its use with African American youth, however, because, race impacts all individuals of African descent, this tool can and should be incorporated into their treatment as well when deemed appropriate.     

A Model for Implementing an Evidence-Based Practice in Student Fieldwork Placements: Barriers and Facilitators to the Use of “SBIRT”

ABSTRACT

This article reports on focus group data analysis that was used to understand initial, largely positive outcomes from a university-based initiative to disseminate and implement an evidence-based practice (EBP)—Screening, Brief Intervention, and Referral to Treatment for Substance Use (SBIRT)—into student fieldwork placements, which are usual care social work settings. Focus groups were conducted with three groups of stakeholders involved in the ongoing project: social work department faculty (n = 10), bachelor- and master-level social work students (n = 8), and social work fieldwork instructors (n = 6). Dimensional analysis of the focus group data yielded results indicating that dissemination and implementation of SBIRT was influenced by agency- and school-level factors and perceived fit between the EBP and individual professional identity, intrapersonal characteristics, and timing. The resulting model, developed through the focus group analysis, is offered and shows how these factors interacted and affected training, supervision, and use of the EBP. The model provides social work educational programs and agencies a working tool for diagnosing and proactively addressing barriers and breakdowns in the EBP implementation process. Future research that tests the model as a diagnostic tool and generates knowledge about its influence in developing competent evidence-based practitioners is indicated. Future focus groups in relation to this initiative are needed to better understand these barriers and facilitators in the EBP implementation process and their critical roles in the process of translating SBIRT into standard social work practice.