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Search Results: 1 - 10 of 152159 matches for " Russell H. Messing "
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The Coffee Berry Borer (Hypothenemus hampei) Invades Hawaii: Preliminary Investigations on Trap Response and Alternate Hosts
Russell H. Messing
Insects , 2012, DOI: 10.3390/insects3030640
Abstract: In August 2010 the coffee berry borer, Hypothenemus hampei, was first reported to have invaded the Kona coffee growing region of Hawaii, posing a severe economic challenge to the fourth largest agricultural commodity in the State. Despite its long and widespread occurrence throughout the tropics as the most serious pest of coffee, there are still discrepancies in the literature regarding several basic aspects of berry borer biology relevant to its control. In Kona coffee plantations, we investigated the beetles’ response to several trap and lure formulations, and examined the occurrence of beetles in seeds of alternate host plants occurring adjacent to coffee farms. While traps were shown to capture significant numbers of beetles per day, and the occurrence of beetles in alternate hosts was quite rare, the unique situation of coffee culture in Hawaii will make this pest extremely challenging to manage in the Islands.
Oviposition of the invasive two-spotted leafhopper on an endemic tree: Effects of an alien weed, foliar pubescence, and habitat humidity
Andrei V. Alyokhin,Pingjun Yang,Russell H. Messing
Journal of Insect Science , 2004,
Abstract: The two-spotted leafhopper, Sophonia rufofascia (Kuoh and Kuoh), is an exotic pest from South-East Asia that attacks a wide variety of plant species in Hawaii. Myrica faya Aiton is an aggressive exotic weed that displaces and excludes native plants in Hawaiian forests. It has been argued that because of the high nutritional quality of its foliage, M. faya might facilitate leafhopper invasion of native Hawaiian ecosystems that were originally dominated by the endemic tree Metrosideros polymorpha (Gaudichaud). In the present study, we quantified suitability of M. faya and M. polymorpha as ovipositional hosts for S. rufofascia. Overall, leafhoppers preferred to deposit their eggs into the foliage of M. faya. M. faya presence in the area did not affect leafhopper oviposition on M. polymorpha. Foliar pubescence provided good protection of hirsute morphotypes of M. polymorpha. At the same time, glabrous M. polymorpha morphotypes were quite suitable for leafhopper oviposition. There was no difference in the abundance of leafhopper eggs along a precipitation gradient. Our results confirm that invasion of native Hawaiian forests by the weed M. faya will facilitate their invasion by S. rufofascia. Because of the broad host range characteristic of the two-spotted leafhopper, this build-up may adversely affect a number of endemic plant species growing in native forests.
Expanding the Boundaries of Major Depressive Disorder in DSM-5: The Removal of the Bereavement Exclusion  [PDF]
H. Russell Searight
Open Journal of Depression (OJD) , 2014, DOI: 10.4236/ojd.2014.31004
Abstract: Expanding the Boundaries of Major Depressive Disorder
A Systematic Review of Cultural Preferences for Receiving Medical “Bad News” in the United States  [PDF]
Christine Larkin, H. Russell Searight
Health (Health) , 2014, DOI: 10.4236/health.2014.616251
Abstract: According to the dominant models of medical ethics in the United States and many Western countries, physician disclosure of information such as diagnosis, treatment options, and prognosis is considered an essential precondition for patient informed consent. While being consistent with the principle of patient autonomy stressed in many Western healthcare systems, full disclosure—particularly of life-threatening diagnoses and poor prognoses—is inconsistent with the cultural values of many ethnic communities within the United States. A systematic review of research examining cultural preferences for disclosure of medical “bad news” was conducted. Results suggested that cultural preferences are more heterogeneous than has often been portrayed. Particularly when communicating with patients and families from culturally and ethnically diverse backgrounds, health care professionals should ask about preferences for receiving medical information and making treatment decisions.
The Value of a Personal Mission Statement for University Undergraduates  [PDF]
Barbara K Searight, H. Russell Searight
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.23043
Abstract: Despite the developmental significance of emerging adulthood as a time for critical self reflection and clarification of values, college and university education rarely includes self-assessment in curricula. Stephen Covey’s book “The Seven Habits of Highly Effective People is a description of the importance of formulating a personal mission and critically reflecting on personal priorities. As part of a course in organizational psychology, students read about mission statements, their importance, and completed an accompanying workbook/journal. A key component of this exercise was for students to develop a personal mission statement. Students reported that they found this activity to be very helpful-- particularly regarding values clarification and how they were actually using their time. Students commented that because of the fast pace of their lives, they rarely had time to engage in this type of reflection and were appreciative of the structure provided by the reading, journal, and opportunity to discuss their goals and values.
Walking in a Natural Winter Setting to Relieve Attention Fatigue: A Pilot Study  [PDF]
Scott Perkins, H. Russell Searight, Susan Ratwik
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.28119
Abstract: Previous research has suggested that exposure to outdoor surroundings is associated with improved attention and concentration among children with attention deficit hyperactivity disorder (AD/HD). This effect has been attributed to the impact of exposure to “green space” in restoring fatigued attention. Because of concerns about side effects and misuse of stimulant medication, there has been considerable interest in green space exposure as a possible alternative or complementary therapy for ADHD. In the current study, adults completed a 20 minute walk in three types of outdoor settings: a wooded trail, a residential neighborhood, and a parking lot. Participants completed subtests from the Wechsler Memory Scale assessing attention, concentration, and short-term memory as well as the Profile of Mood States, a self-report measure for assessing current emotional status. Based upon previous green space research, it was anticipated that participants in the wooded trail condition would perform better on the cognitive tasks. However, there was no difference between the three conditions in participants’ pre- and post-walk cognitive functioning. When data from the three groups were pooled, there was a significant benefit associated with the 20 minute walk for short-term memory as well in reducing tension, depression, anxiety, fatigue, and confusion. The results do suggest that relatively brief outdoor physical activity may be a useful complementary intervention for persons with conditions adversely affecting short-term memory
Mitochondrial Medicine and the Neurodegenerative Mitochondriopathies
Russell H. Swerdlow
Pharmaceuticals , 2009, DOI: 10.3390/ph2030150
Abstract: Neurodegenerative diseases are a common late-life scourge for which diseasemodifying treatments are sorely needed. Mitochondrial perturbation is commonly observed in these diseases, so pursuing treatment development strategies that target mitochondria or processes affected by mitochondria seems reasonable. This review discusses the rationale underlying past and current efforts to treat neurodegenerative diseases using mitochondrial medicine, and tries to predict how future efforts might proceed.
Hearts-on Approach to Educational Leadership
Russell H. Adams
Christian Perspectives in Education , 2008,
Abstract: Christian educational leaders come equipped with an arsenal of skills, talents, and beliefs rooted in their faith. The synthesis of faith in their daily lives or “hearts-on” approach provides them a solid foundation. Communication is the most important skill for an effective leader. This article provides an overview of the critical elements of communication and their potential impact upon educational leadership. Several communication styles and strategies are discussed and clarified by biblically-inspired directives.
On a single-server queue with fixed accumulation level, state dependent service, and semi-Markov modulated input flow
Jewgeni H. Dshalalow,Gary Russell
International Journal of Mathematics and Mathematical Sciences , 1992, DOI: 10.1155/s0161171292000759
Abstract: The authors study the queueing process in a single-server queueing system with state dependent service and with the input modulated by a semi-Markov process embedded in the queueing process. It is also assumed that the server capacity is r ¢ ‰ ¥1 and that any service act will not begin until the queue accumulates at least r units. In this model, therefore, idle periods also depend upon the queue length.
Recent changes in seasonal variations of climate within the range of northern caribou populations
Paul H. Whitfield,Don Russell
Rangifer , 2005,
Abstract: The Arctic is one region where it is expected that the impacts of a globally changing climate will be readily observed. We present results that indicate that climate derivatives of potential significance to caribou changed during the past 50 years. Many temperature derivatives reflect the increasing overall temperature in the Arctic such as decreases in the number of days with low temperatures, increases in the number of days with thaw, and days with extremely warm temperatures. Other derivatives reflect changes in the precipitation regime such as days with heavy precipitation and number of days when rain fell on snow. Our results indicate that specific caribou herds from across the Arctic were subjected to different variations of these derivatives in different seasons in the recent past. Examination of temperature and precipitation at finer time-steps than annual or monthly means, shows that climatic variations in the region are neither consistent through the seasons nor across space. Decadal changes in seasonal patterns of temperature and precipitation are shown for selected herds. A process for assessing caribou-focused climate derivatives is proposed.
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