1,019 research outputs found

    Optimum correction of thrust transient measurements

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    Optimum correction of distorted thrust transient measurement

    Crop Stress Detection and Classification Using Hyperspectral Remote Sensing

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    Agricultural production has observed many changes in technology over the last 20 years. Producers are able to utilize technologies such as site-specific applicators and remotely sensed data to assist with decision making for best management practices which can improve crop production and provide protection to the environment. It is known that plant stress can interfere with photosynthetic reactions within the plant and/or the physical structure of the plant. Common types of stress associated with agricultural crops include herbicide induced stress, nutrient stress, and drought stress from lack of water. Herbicide induced crop stress is not a new problem. However, with increased acreage being planting in varieties/hybrids that contain herbicide resistant traits, herbicide injury to non-target crops will continue to be problematic for producers. With rapid adoption of herbicide-tolerant cropping systems, it is likely that herbicide induced stress will continue to be a major concern. To date, commercially available herbicide-tolerant varieties/hybrids contain traits which allow herbicides like glyphosate and glufosinate-ammonium to be applied as a broadcast application during the growing season. Both glyphosate and glufosinate-ammonium are broad spectrum herbicides which have activity on a large number of plant species, including major crops like non-transgenic soybean, corn, and cotton. Therefore, it is possible for crop stress from herbicide applications to occur in neighboring fields that contain susceptible crop varieties/hybrids. Nutrient and moisture stress as well as stress caused by herbicide applications can interact to influence yields in agricultural fields. If remotely sensed data can be used to accurately identify specific levels of crop stress, it is possible that producers can use this information to better assist them in crop management to maximize yields and protect their investments. This research was conducted to evaluate classification of specific crop stresses utilizing hyperspectral remote sensing

    Crop Stress Detection and Classification Using Hyperspectral Remote Sensing

    Get PDF
    Agricultural production has observed many changes in technology over the last 20 years. Producers are able to utilize technologies such as site-specific applicators and remotely sensed data to assist with decision making for best management practices which can improve crop production and provide protection to the environment. It is known that plant stress can interfere with photosynthetic reactions within the plant and/or the physical structure of the plant. Common types of stress associated with agricultural crops include herbicide induced stress, nutrient stress, and drought stress from lack of water. Herbicide induced crop stress is not a new problem. However, with increased acreage being planting in varieties/hybrids that contain herbicide resistant traits, herbicide injury to non-target crops will continue to be problematic for producers. With rapid adoption of herbicide-tolerant cropping systems, it is likely that herbicide induced stress will continue to be a major concern. To date, commercially available herbicide-tolerant varieties/hybrids contain traits which allow herbicides like glyphosate and glufosinate-ammonium to be applied as a broadcast application during the growing season. Both glyphosate and glufosinate-ammonium are broad spectrum herbicides which have activity on a large number of plant species, including major crops like non-transgenic soybean, corn, and cotton. Therefore, it is possible for crop stress from herbicide applications to occur in neighboring fields that contain susceptible crop varieties/hybrids. Nutrient and moisture stress as well as stress caused by herbicide applications can interact to influence yields in agricultural fields. If remotely sensed data can be used to accurately identify specific levels of crop stress, it is possible that producers can use this information to better assist them in crop management to maximize yields and protect their investments. This research was conducted to evaluate classification of specific crop stresses utilizing hyperspectral remote sensing

    Professional Development Principles for Teachers of English Language Learners

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    Since effective professional development is logically embedded in the reality of schools and teachers‘ work, it stands to reason that the principal would consider that reality for teachers of English language learners (ELL). Certainly, in general, professional development would incorporate principles of adult learning as reported by Knowles (1980): (1) adult learners need to be self-directed; (2) they display readiness to learn when they have a perceived need; and (3) they desire immediate application of new skills and knowledge. Based on adult learning theory, then, principals would provide teachers of ELLs professional development that addresses a need for self-direction, that addresses their particular needs, and that addresses the desire to apply what is learned. Time and created situations whereby teachers can dialogue with other teachers and principals can dialogue with other principals is critical for the effective application of the knowledge gained in professional development sessions and afterward as well

    The Synergistic Leadership Theory: Contextualizing Multiple Realities of Female Leaders

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    The authors describe the Synergistic Leadership Theory (SLT), which includes four factors: Leadership Behavior, Organizational Structure, External Factors, and Beliefs, Attitudes, and Values. The factors are described and contributions to existing leadership theory are explained. They further apply the factors to four cases in order to illustrate the application of the theory to leadership practice. The authors conclude that SLT, in including the female perspective, provides an expanded framework for taking a macro-perspective of the interactions among beliefs, external forces, people, and organizations

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    This issue focuses on the culture transition and pursuit of knowledge and self. Four articles discuss ethnic women in leadership; two articles target the barriers women face in their fields, and the final article addresses self-awareness. The articles included are: "Black Women in Academe: Progress But No Parity" (Sheila T. Gregory); "Mexican Women Confront Mainstream Policy: Voices from the Colonias Address Family Self-sufficiency" (Georgiana Vaccaro and Ann Lessem); "Hispanic Women Leaders and Their Perceptions of Affirmative Action" (Kaye L. Peery and Marilyn L. Grady); "Women in Transition: A Mission of Service" (Catherine E. Hackney and Elaine M. Hogard); "Double Discrimination: An Examination of the Career Destinations of Muslim Women in Britain" (Marie Parker-Jenkins, Kaye F. Haw, Barrie A. Irving, and Shazia Khan); "Women Faculty Pursuing Grants: Gender Differences" (Patricia Boyer and Irv Cockriel); and "Dancing for Self-Knowledge" (Joyce Kutcher)

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    As AWL readers will recall, the first issue of the journal was composed of invited papers. This issue was the first reviewed issue. The editors and publisher greatly appreciate our colleagues at the University of Southern Mississippi, Hattiesburg, MS, for providing the initial pilot for the reviews and editorial procedures for this new journal. This issue addresses a variety of concerns of women and of society. Four of the articles target the experiences of women in leadership, two of the articles offer insights on the dilemmas facing professional women, and one article discusses the spread of HIV among Black women

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    This issue examines the advances women have accomplished and the goals that lay ahead. Three articles discuss the strides women have made, and the final article addresses the additional barrier of American and International Overseas schools. The articles included are: "Paradigm Shift: A Perspective on Omani Women in Management in the Sultanate of Oman" (Salma M. Al-Lamki); "Barriers to Upward Mobility in International Schools for Women Administrators" (Barbara T. Berman); "Reflections of a Female School Executive" (Willa L. Gipson); "The School Superintendency: Male Bastion or Equal Opportunity" (Mimi Wolverton)

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    This issue explores a cornucopia of perspectives with the bonus of a High School essay winner. Two articles are research papers that ask and acknowledge some controversial questions and allow readers to compare results with their tables. The reflective articles consider women as leaders and the job of mentoring. The articles within are: "Faculty Tiering and Academic Inbreeding: One Institution's Relationships and Realities" (Debra Blanke, Adrienne Hyle); "Attitudes Toward Women Leaders Analyzed by Gender and Occupations (1984-1998)" (Jacqueline Lougheed); "Beyond Mentoring: Toward an Invitational Academe" (Catherine Hackney, Marianne Bock); "Successful Women Leaders: Achieving Resiliency through Rituals and Resources" (Judith DeTrude, Vicki Stanfield); "Women as Leaders: Piecing Together Their Reflections on Life and the Principalship" (Nancy Colflesh); and "Women of Courage: Yesterday and Today" (Katie Papazian

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    This issue explores several perspectives ranging from Feminist Epistemology to learning how to turn anger into knowledge. The reflective articles in this edition include subjects which pertain to things that effect women in the workplace such as: stereotypes, ideologies, and anger. These selections also discus how women may overcome such barriers
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