8毫米便携式微波辐射-散射计的控制、数据采集和处理系统

In this paper we describe a system used to control,collect and process data in 8mm portable microwave radiometer-scatterometer,We focus on hardware and software design of the system based on a PIC16F874 chip.The system has been successfully used in an 8mm portable microwave radiometer-scatterometer,compared with other similar systems,the system modularization miniatureization and intelligentization are improved so as to meet portable instrument requirements.     

Students Connecting with the Elderly: Validation as a Tool

In this article we respond to the call to action that is the crisis among seniors called The Silver Tsunami! We describe the education of students through the use of Feil's Validation Therapy. There are growing concerns among social service providers regarding the rapid increase of the elderly population and the lack of adequate staff to provide care for our seniors. If we as educators, agency administrators, or committed family members ignore this call to action, the cycle of the employee “revolving door” will continue with inadequately trained and emotionally disconnected personnel working with aging persons. Frontline workers are the backbone of any agency. They are the ones who interact with seniors and their loved ones and collaborate with other medical and community professionals. We, as their teachers, must enhance their knowledge and skills so they many continue to provide service to the second most vulnerable population.     

Selection bias in college admissions test scores

Data from college admissions tests can provide a valuable measure of student achievement, but the non-representativeness of test-takers is an important concern. We examine selectivity bias in both state-level and school-level SAT and ACT averages. The degree of selectivity may differ importantly across and within schools, and across and within states. To identify within-state selectivity, we use a control function approach that conditions on scores from a representative test. Estimates indicate strong selectivity of test-takers in “ACT states,” where most college-bound students take the ACT, and much less selectivity in SAT states. To identify within- and between-school selectivity, we take advantage of a policy reform in Illinois that made taking the ACT a graduation requirement. Estimates based on this policy change indicate substantial positive selection into test participation both across and within schools. Despite this, school-level averages of observed scores are extremely highly correlated with average latent scores, as across-school variation in sample selectivity is small relative to the underlying signal. As a result, in most contexts the use of observed school mean test scores in place of latent means understates the degree of between-school variation in achievement but is otherwise unlikely to lead to misleading conclusions.     

The informationist: building evidence for an emerging health profession

Background:

To encourage evidence-based practice, an Annals of Internal Medicine editorial called for a new professional on clinical teams: an informationist trained in science or medicine as well as information science.

Objectives:

The study explored the effects of informationists on information behaviors of clinical research teams, specifically, frequency of seeking information for clinical or research decisions, range of resources consulted, perceptions about access to information, confidence in adequacy of literature searches, and effects on decision making and practice. It also explored perceptions about training and experience needed for successful informationists.

Methods:

Exploratory focus groups and key interviews were followed by baseline and follow-up surveys conducted with researchers and clinicians receiving the service. Survey data were analyzed with Pearson''s chi-square or Fisher''s exact test.

Results:

Comparing 2006 to 2004 survey responses, the researchers found that study participants reported: seeking answers to questions more frequently, spending more time seeking or using information, believing time was less of an obstacle to finding or using information, using more information resources, and feeling greater satisfaction with their ability to find answers. Participants'' opinions on informationists'' qualifications evolved to include both subject knowledge and information searching expertise.

Conclusion:

Over time, clinical research teams with informationists demonstrated changes in their information behaviors, and they valued an informationist''s subject matter expertise more.

Highlights

• Informationist involvement in traditional team activities—going on rounds and searching and critically evaluating the literature—increased over time.
• As the relationship between a clinical team and informationist developed, activities expanded to include projects such as development of wikis, databases, and websites.
• Clinical teams came to view subject knowledge as key to an informationist''s preparation; however, their expertise as information scientists was valued most highly.
• “Initiative,” approaching research staff in their workplace, was the one personal trait focus group participants agreed on as most desirable for an informationist.
• When first introduced to the concept, researchers cited customization of services to team needs as a major benefit.

Implications

• To assure a successful informationist program, libraries must be prepared to commit time and money.
• Whether informationists or not, librarians should be prepared to support users'' increased need for genetics and molecular biology information.

     

Intro to Archival Science: Developing an Undergraduate Archival Elective Outside of a LIS Program

Abstract

This case study describes the development and implementation of a three-credit undergraduate archival science course at Mount St. Mary’s University. Offered through the university’s Department of History, this course was designed to prepare students for positions in archives-related careers, unlike most research-based undergraduate archival electives. Benefits of the course to both students and the archivist profession will be discussed.