A First Course in Electrical Engineering     

Clement  P. R. Johnson  W. C. 《Education, IRE Transactions on》1960,3(1):19-21

This article describes the introductory two-semester course in electrical engineering that has been developed over a period of five years at Princeton University. The aims of the course are to provide an introduction to the field of electrical engineering via the basic concepts of electricity and magnetism (which are developed through Maxwell's equations in the integral form), to apply these concepts in developing the fundamentals of energy conversion and circuit theory, and to carry forward, in a continuous and integrated way, a modern treatment of network analysis. Thus, the treatment proceeds from field ideas to circuits and physical apparatus, and to their mathematical models. With the circuit relations formulated, attention turns to the analysis of networks, starting with network topology and extending through pole-zero ideas. The treatment stops just short of the Laplace transform. This course is intended to serve as a foundation for subsequent courses such as electronic circuits, energy conversion, and advanced network analysis and synthesis, and has been developed with the purpose of providing the student with a unifying point of view for these varied topics.  相似文献   

Avoiding versus seeking: the relationship of information seeking to avoidance, blunting, coping, dissonance, and related concepts.   总被引：1，自引：0，他引：1  

Donald O Case  James E Andrews  J David Johnson  Suzanne L Allard 《Journal of the Medical Library Association》2005,93(3):353-362

QUESTION: How have theorists and empirical researchers treated the human tendency to avoid discomforting information? DATA SOURCES: A historical review (1890-2004) of theory literature in communication and information studies, coupled with searches of recent studies on uptake of genetic testing and on coping strategies of cancer patients, was performed. STUDY SELECTION: The authors' review of the recent literature included searches of the MEDLINE, PsychInfo, and CINAHL databases between 1992 and summer of 2004 and selective, manual searches of earlier literature. Search strategies included the following subject headings and key words: MeSH headings: Genetic Screening/psychology, Decision Making, Neoplasms/diagnosis/genetics/psychology; CINAHL headings: Genetic Screening, Genetic Counseling, Anxiety, Decision Making, Decision Making/Patient; additional key words: avoidance, worry, monitoring, blunting, cancer. The "Related Articles" function in MEDLINE was used to perform additional "citation pearl" searching. MAIN RESULTS: The assumption that individuals actively seek information underlies much of psychological theory and communication practice, as well as most models of the information-seeking process. However, much research has also noted that sometimes people avoid information, if paying attention to it will cause mental discomfort or dissonance. Cancer information in general and genetic screening for cancer in particular are discussed as examples to illustrate this pattern. CONCLUSION: That some patients avoid knowledge of imminent disease makes avoidance behavior an important area for social and psychological research, particularly with regard to genetic testing.  相似文献   

PrefacePréfacePrefacio     

John D. Turner 《International Journal of Educational Development》1981,1(1):iii-v

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The effect of acute aerobic exercise on central arterial stiffness,wave reflections,and hemodynamics in adults with diabetes: A randomized cross-over design     

Kimberley L. Way  Angela S. Lee  Stephen M. Twigg  Nathan A. Johnson 《运动与健康科学(英文)》2021,10(4):499

BackgroundIndividuals with diabetes have greater central arterial stiffness, wave reflections, and hemodynamics, all of which promote the accelerated cardiovascular pathology seen in this population. Acute aerobic exercise has been shown to be an effective strategy for reducing central arterial stiffness, wave reflections, and hemodynamics in healthy individuals; however, the effects of acute aerobic exercise in reducing these outcomes is not well established in people with diabetes. Recently, implementation of high-intensity interval exercise (HIIE) has shown superior improvements in cardiovascular health outcomes when compared to traditional aerobic exercise. Yet, the effect of HIIE on the aforementioned outcomes in people with diabetes is not known. The purpose of this study was to (i) describe the central arterial stiffness, wave reflections, and hemodynamic responses to a bout of HIIE and moderate-intensity continuous exercise (MICE) in adults with diabetes; and (ii) compare the effects of HIIE and MICE on the aforementioned outcomes.MethodsA total of 24 adult men and women (aged 29–59 years old) with type 1 (n = 12) and type 2 (n = 12) diabetes participated in a randomized cross-over study. All participants completed the following protocols: (i) HIIE: cycling for 4 × 4 min at 85%–95% of heart rate peak (HR_peak), interspersed with 3 min of active recovery at 60%–70%HR_peak; (ii) MICE: 33 min of continuous cycling at 60%–70%HR_peak; and (iii) control (CON): lying quietly in a supine position for 30 min.ResultsA significant group × time effect was found for changes in central systolic blood pressure (F = 3.20, p = 0.01) with a transient reduction for the HIIE group but not for the MICE or CON groups. There was a significant group × time effect for changes in augmentation index at a heart rate of 75 beats/min (F = 2.32, p = 0.04) with a decrease following for HIIE and MICE but not for CON. For all other measures of central arterial stiffness and hemodynamics, no significant changes were observed (p > 0.05).ConclusionA bout of HIIE appears to lead to a greater transient reduction in central systolic blood pressure than the reduction observed following MICE; however, both HIIE and MICE improved augmentation index at a heart rate of 75 beats/min in people with diabetes. There was no significant difference in response to HIIE and MICE in all outcomes. This provides preliminary evidence on the role of HIIE on such outcomes in people with diabetes.  相似文献   

A novel scale to assess resistance-exercise effort     

DA Hackett  NA Johnson  M Halaki  CM Chow 《Journal of sports sciences》2012,30(13):1405-1413

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Regulation of professional sport in a changing broadcasting environment: Australian club and sport broadcaster perspectives     

Paul Turner 《Sport Management Review》2012,15(1):43-59

Broadcasting is undergoing massive changes with technology introducing new delivery opportunities and thereby more broadcasters into the equation. Emerging technology in the sport broadcasting environment is complicated by the existing league and broadcasting regulations. League-based regulations impact on income distribution and product distribution, while broadcasting regulations, largely imposed by the elected Federal Government of the day, are enacted to ensure that commercial and public interests are being supported. Introducing a stakeholder interest-based approach, the regulation affecting professional sport clubs and broadcasters was examined in order to identify how they would respond to the regulation imposed on them in the emerging broadcasting environment.In depth interviewing of senior managers of Australian Football League (AFL) and National Rugby League (NRL) clubs as well as sport broadcasters was undertaken with the data analysed, and emergent themes recorded. Results indicate that league, broadcaster and government regulations impact on the clubs and broadcasters in a variety of ways, with clubs facing regulation from the league and the broadcasters, while the broadcasters and league face regulation from the government legislation enacted. The results indicate that these organisations need to be aware of the conditions that arise from the existing and emerging broadcast regulatory environment in order to better understand and respond to it.  相似文献   

希望是一种选择     

李起 《海外英语》2010,(7)

飓风卡特里娜是美国历史上最具毁灭件的惨剧之一.2005年8月,卡特里娜袭击海湾沿岸并摧毁新奥尔良市时,我在俄克拉何马市住宅和城市发展部工作.一天,我们清静的办公楼为一队由12人组成的取消抵押晶赎回权专业人士提供了场所.次周,我们的全体职员新增了300多名卡特里娜飓风救灾的代表.我们的工作:帮助受影响的私房业主解决按揭问题.为那些租赁户提供援助,尽力重新安置他们.  相似文献   

Prevalence of childhood sexual abuse among incarcerated males in county jail     

Johnson RJ  Ross MW  Taylor WC  Williams ML  Carvajal RI  Peters RJ 《Child abuse & neglect》2006,30(1):75-86

OBJECTIVE: The current study examined the prevalence and characteristics of childhood sexual abuse in a jailed-based population. METHODOLOGY: A retrospective, self-reported survey was administered over an 8-week period to a random sample of 100 men who were incarcerated in a county jail in Southeastern Texas. The survey included questions about childhood sexual experiences before and after puberty, drug history and use, and sexual risk-taking behaviors. RESULTS: Of the 100 male inmates who participated in this study, 59% reported experiencing some form of sexual abuse before puberty, and all such instances occurred before or at the age of 13 years. The first episode of childhood sexual abuse began at an average age of 9.6 years (SD = 2.4), and ended at an average age of 13.0 years (SD = 2.3). Kissing and touching without intercourse (64%) was the common pattern of sexual abuse experience reported. The total number of perpetrators was 165, with 10% male and 90% female. Friends (n = 72) and family (n = 56) were the most frequent perpetrators. CONCLUSION: Childhood sexual abuse may be more prevalent among inmates than among males in the general population. These results show a high percentage of inmates who report a history of childhood sexual abuse; this rate is higher than those reported by other studies for incarcerated males. The findings support the belief held by professionals in the criminal justice field that a significant number of incarcerated males may have been victims of sexual abuse.  相似文献   

International perspectives on student awareness,experiences and perceptions of research: implications for academic developers in implementing research‐based teaching and learning     

Nancy Turner  Brad Wuetherick  Mick Healey 《International Journal for Academic Development》2013,18(3):199-211

This paper explores the implications of the effective integration of research, teaching and learning for academic development through the lens of an international multi‐institutional comparison of student perceptions of research and its impact on their learning environment. The study, with a sample of over 500 final‐year undergraduate students across three institutions in the UK and Canada, represents a spectrum of research and teaching intensive universities and is one of the largest exploring undergraduate student perceptions of research in the linking teaching and research literature. The results indicate a complex relationship between student perceptions and experiences of research and the type of institution, as well as the individual, institutional and national context. They also inform the discussion of particular issues that academic developers face and the strategies they use to improve the integration of research and teaching to benefit the undergraduate learning experience in their institution.

Cet article explore les implications, pour le développement pédagogique, de l’intégration effective de la recherche, de l’enseignement et de l’apprentissage à l’aide de la lentille d’une comparaison internationale multi institutionnelle des perceptions étudiantes à l’égard de la recherche et de leur impact sur l’environnement d’apprentissage. L’étude, reposant sur un échantillon de plus de 500 étudiants en dernière année de 1^er cycle, provenant de trois institutions au Royaume‐Uni et au Canada, représente un spectre d’universités centrées sur l’enseignement ou sur la recherche. L’étude constitue une des recherches les plus importantes au sujet des perceptions étudiantes à l’égard de la recherche dans la littérature portant sur le lien entre l’enseignement et la recherche. Les résultats indiquent une relation complexe entre les perceptions et les expériences des étudiants, et le type d’institution, de même qu’avec les contextes individuel, institutionnel et national. Les résultats contribuent aussi à la discussion de questions particulières auxquelles les conseillers pédagogiques font face ainsi que les stratégies que ceux‐ci utilisent en vue d’améliorer l’intégration de la recherche et de l’enseignement de façon à en faire bénéficier l’expérience d’apprentissage au 1^er cycle au sein de leur institution.  相似文献   

Delving into alumni perceptions about the impact and effectiveness of two certificate programs: meeting their mission?     

Tristan E. Johnson  Erman Yukselturk  Ercan Top 《Teaching in Higher Education》2013,18(4):360-372

The purpose of the study was to analyze two certificate programs in regard to the impacts on alumni professional career and strengths and weaknesses of certificate programs in the views of their alumni. The sample consisted of 58 participants who completed one of the certificate programs. The results showed that alumni rated self-improvement as the biggest benefit, career advancement benefit as average, and career change benefit as low from the certificate programs. Also, alumni thought that all program components were of strong quality, but the majority of alumni still wanted to see an increased emphasis on teaching, interaction with other students, support, and assessment feedback focus of the program.  相似文献