163 results on '"Miller, Steven L."'
Search Results
152. Priority effects in the recruitment of juvenile coral reef fishes
- Author
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Miller, Steven L., Ebersole, John P., Ogden, John C., McFarland, William N., Wolf, Nancy G., and Shulman, MyraJ.
- Subjects
CORAL reefs & islands ,ECOLOGY ,FISHES - Published
- 1983
153. Characterization of red alder ectomycorrhizae: a preface to monitoring belowground ecological responses
- Author
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Molina, Randy, Miller, Steven L., and Koo, C. D.
- Published
- 1991
154. Mycorrhization, physiognomy, and first-year survivability of coniferseedlings following natural fire in Grand Teton National Park
- Author
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Williams, Stephen E., Stanton, Nancy L., McClean, Therese M., and Miller, Steven L.
- Subjects
FOREST management ,TREE growth - Abstract
Ectomycorrhiza formation, survivability, and physiognomic characteristics were assessed for conifer seedlings encountered 1 and 2 years postfire in the Huck burn site near Grand Teton National Park. Pinus contorta Dougl. ex Loud. germinated and was abundant throughout the first growing season. Abies lasiocarpa (Hook.) Nutt. germinated during May and June but was rarely encountered by September. First-year survivorship of P. contorta seedlings was about 50% for east-facing burn and edge and west-facing burn treatments. Mortality was higher in thewest-facing edge treatment at about 64%. Pinus contorta seedlings collected in July and August had allocated approximately 75% more biomass to epicotyl production than to hypocotyl production, whereas by September seedlings had allocated 30--50% of their biomass to hypocotyls, regardless of site or treatment. Few or no ectomycorrhizae were formed until September. By September 100% of surviving seedlings were ectomycorrhizal. The number of ectomycorrhizae was positively correlated with the number of primary needles and the root/shoot ratio. Theseresults highlight the importance of mycorrhizae to conifer seedling survival during the initial growing season and point to alteration ofcarbon allocation as a primary mechanism affecting seedling survival. [ABSTRACT FROM AUTHOR]
- Published
- 1998
155. Root-gap dynamics in a lodgepole pine forest: ectomycorrhizal and nonmycorrhizal fine root activity after experimental gap formation
- Author
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Knight, Dennis H., Miller, Steven L., and Parsons, William F. J.
- Subjects
FORESTS & forestry - Published
- 1994
156. Writing to your broker can protect you.
- Author
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Miller, Steven L.
- Subjects
STOCKBROKERS ,RISK-taking behavior ,PHYSICIANS ,PERSONAL finance - Abstract
Encourages doctors-investors in the United States to write a letter anytime their brokers seem to be increasing risks more than what they want. Brokerages' use of clients' profile; Need for honesty in describing one's finances and investment objectives; Objective of the so-called `activity letter.'
- Published
- 2000
157. Southern Crossroads: Perspectives on Religion and Culture.
- Author
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Miller, Steven L.
- Subjects
- *
NONFICTION , *RELIGION - Abstract
This article reviews the book "Southern Crossroads: Perspectives on Religion and Culture," edited by Walter H. Conser Jr. and Rodger M. Payne.
- Published
- 2008
- Full Text
- View/download PDF
158. The Octocoral Fishery in the Southeastern U.S. and Gulf of Mexico.
- Author
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CHIAPPONE, MARK, ESPITIA, PAOLA, RUTTEN, LEANNE M., and MILLER, STEVEN L.
- Subjects
- *
OCTOCORALLIA , *FISHERIES , *FISHERY management , *MARINE aquariums , *FISH populations - Abstract
Octocorals, also known as gorgonians and soft corals, were previously managed by the U.S. South Atlantic (SAFMC) and Gulf of Mexico (GMFMC) Fishery Management Councils through a joint Coral Fishery Management Plan (FMP). Because octocorals are mostly collected from Florida waters, the Florida Fish and Wildlife Conservation Commission (FWC) is currently tasked with managing octocoral collection, including the monitoring of colony landings, in the Economic Exclusive Zone (EEZ) adjacent to Florida. Collection of 70,000 colonies per year total, which applies to both state and EEZ waters off Florida, is permitted under Rule 68B- 42.006 of the Florida Administrative Code, but has never been exceeded according to available landings data. Before octocoral management responsibility was transferred to the State of Florida, the SAFMC was concerned that octocoral landings data, as opposed to population data, were being used to set Acceptable Biological Catch limits and Overfishing limits under the new Federal fishery management standards. An additional concern with the octocoral fishery and other organisms captured for the marine aquarium and ornamental fisheries is that large taxonomic groups are lumped together, including species with potentially different life histories and ecological functions. This study assessed some of the characteristics of the octocoral fishery by evaluating FWC Trip Ticket data, conducting interviews with octocoral collectors, and analyzing octocoral life history information and available fishery-independent data on population densities and sizes. Based on interviews with collectors, a synthesis of trip ticket results, and population abundance estimates, the long-term stability of the octocoral fishery is not likely to change significantly. The social dynamics of the aquarium industry to seek colorful, rare, and exotic marine species for home aquaria places octocorals at the lower end of the list of desired species. Octocoral distribution and abundance information obtained from an extensive search of the literature, along with available age, growth, and habitat data, suggests that current information is comprehensive and definitive, such that stock assessment or population dynamic modeling could be considered but are probably not required to assess the status of collected octocoral species. For multiple sampling periods, over a decadal period (1999-09) in the Florida Keys, where most octocoral collection occurs, abundance estimates presented for 15 species illustrate that population sizes are large (tens of millions to hundreds of millions of colonies, per species) and abundance is stable or increasing. For example, the numbers of colonies collected in the Florida Keys in two of the collector categories represented < 0.004% of the estimated population sizes. The collectors and aquarium hobbyists interviewed stated that they would welcome and use a field guide to help with octocoral identification, which would ultimately provide better fishery-dependent taxonomic resolution for collected species. The collection of octocorals below the State of Florida quota of 70,000 colonies per year threshold, which has yet to be reached according to landings data, likely does not adversely affect the octocoral populations targeted. This conclusion is based upon the large population estimates determined for octocorals relative to the small number of colonies collected. This conclusion assumes that the distribution and population sizes of targeted species will continue to be relatively stable or increase. Information collected by the State of Florida through trip tickets is probably adequate to understand and manage the octocoral fishery. Minor reporting clarifications and better taxonomic resolution in reporting would help improve the accuracy of collecting data, but improved accuracy is not required to assess the current state of the fishery-the octocoral fishery is sustainable and would likely remain sustainable at colony collection levels orders of magnitude larger. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
159. New biological books: Botanical sciences.
- Author
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Miller, Steven L.
- Subjects
- ASPECTS of Tropical Mycology (Book)
- Abstract
Reviews the book `Aspects of Tropical Mycology,' edited by Susan Isaac, Juliet C. Frankland, Roy Watling and Anthony J.S. Whalley.
- Published
- 1995
160. Gymnomyces xerophilus sp. nov. (sequestrate Russulaceae), an ectomycorrhizal associate of Quercus in California
- Author
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Smith, Matthew E., Trappe, James M., Rizzo, David M., and Miller, Steven L.
- Subjects
- *
RUSSULACEAE , *FUNGI , *BLUE oak , *MOLECULAR phylogeny , *PHYLOGENY - Abstract
Abstract: Gymnomyces xerophilus sp. nov., a sequestrate species in the Russulaceae, is characterized and described morphologically as a new species from Quercus-dominated woodlands in California. ITS sequences recovered from healthy, ectomycorrhizal roots of Quercus douglasii and Q. wislizeni matched those of G. xerophilus basidiomata, confirming the ectomycorrhizal status of this fungus. Phylogenetic analysis of the ITS region places G. xerophilus in a clade with both agaricoid (Russula in the section Polychromae) and sequestrate (Gymnomyces, Cystangium) relatives. We include a dichotomous key to the species of Gymnomyces associated with Quercus. [Copyright &y& Elsevier]
- Published
- 2006
- Full Text
- View/download PDF
161. The Impact of the Ohio Graduation Test on Geography Instruction as Perceived by the Secondary Social Studies Teachers in Central Ohio
- Author
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Ayas, Cemallettin and Miller, Steven L.
- Abstract
The purpose of this study was to explore the perspectives of social studies teachers concerning the impact of the Ohio Graduation Test (OGT) on geography instruction in the secondary schools of central Ohio. The central research question was, From the perspectives of social studies teachers in secondary schools of central Ohio, what has been the effect of the Ohio Graduation Test (OGT) on geography instruction? In order to answer this major question in addition to supplementary research subquestions, an exploratory study employing quantitative methods was designed and successfully carried out in accordance with the procedures explained in detail in the methodology chapter. To summarize, the population of this study consisted of all secondary social studies teachers who are currently teaching in the middle and high schools of central Ohio. A specifically developed 28-item cross-sectional survey as the major data collection instrument for this study was constructed through a content validity approach and pilot tested. The survey instrument was then administered via the Internet to a randomly selected sample of secondary social studies teachers. The number of teachers who responded to the questionnaire is 206. The data gathered were analyzed by SPSS 16.0. Data analysis of the study basically utilized descriptive statistics. Tables and figures were constructed to present the results. The research instrument was intended to measure the perspectives of social studies teachers regarding whether or not there has been a change in geography instruction following the OGT, especially in the areas of instructional time devoted to teaching geography, curriculum and the instructional strategies used in the classroom, use of teaching materials, emphasis of particular geographic concepts/topics, and perceptions about geography and the impact of the OGT. The major demographic profile of the research subjects, according to responses from social studies teachers who participated in the study, is by and large Caucasian males who teach middle class students with above average OGT scores in suburban public schools for 11 or more years. A great majority of those teachers have a master s degree, hold a comprehensive social studies (7-12) licensure and completed at least two or more college level geography courses. One-third of these teachers work at a middle school and two-thirds work in a high school setting. Typically they work as teachers of U.S. History, World History and U.S. Government. Due to the nature of the OGT as a state-mandated standardized testing program, the results of this study mainly contributed to two bodies of literature: geography education in particular and high-stakes testing in general. Based on the overall research findings, it would be reasonable to infer that the OGT has impacted the way in which geography instruction is delivered in the secondary schools of central Ohio. Yet, this effect showed some variation by school level (middle school versus high school) as well as by grade level (Grades 6-8, 9-10 and 11-12). Parallel to the current literature regarding the effects of high-stakes testing on teaching and learning, the results of this study indicate that social studies teachers do practice more of a teaching to the test strategy since the implementation of the OGT. The findings specifically suggest that teachers who teach the grades where the OGT is administered evidently perform more teaching to the test behavior and are under more pressure. However, the most important impact that the OGT has had on geography instruction is a noteworthy decrease in the amount of time teachers spend with geography in their general social studies curriculum. According to the data, the time devoted to teaching geography is diminishing. Even though geography is one of the social studies subjects tested on the OGT, the decrease in the amount of time to teach geography within the social studies curriculum might imply that the geography portion of the social studies test on the OGT is not as important as the others or that geography is over-shadowed in the social studies curriculum by other subjects particularly by history. This was evidenced by the finding that teachers consider geography the least emphasized among the social studies content areas tested on the OGT. As a result, along with recommendations for further research, contributions to the related literature and implications for both policy-making and teaching and learning were discussed in detail.
- Published
- 2009
162. An Investigation of Computer-based Brain Training on the Cognitive and EEG Performance of Employees .
- Author
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Miller SL, Chelian S, McBurnett W, Tsou W, and Kruse AA
- Subjects
- Attention, Cognition, Electroencephalography, Humans, Brain, Memory
- Abstract
Neurocognitive skills (e.g., processing speed, attention and memory) were hypothesized to be critical for workplace performance and by extension for the work-life balance of employees. Twenty-one employee volunteers underwent a neurocognitive training program - which consisted of an initial pre-test assessment, a six week "boost" or intervention period, and then a re-assessment to track the progress of each participant. A median split of the group created two training groups: a long-training group that averaged 30 hours of total training during the boost period; and a short-training group that averaged 7 hours of training. On pre-training measures of neurocognitive performance, group differences in performance did not reach statistical significance. Following training participants experienced a positive impact from the program as measured in three ways: standardized higher behavioral metrics, improved cognitive state metrics using EEG and positive self-reported data. From a quantitative perspective, participants' cognitive efficiency increased by 12% for the high-training group and 5% for the low-training group (cognitive efficiency refers to a behavioral measure which combines accuracy and speed). Qualitatively, study participants reported improvements in their productivity and mental performance post-study.
- Published
- 2019
- Full Text
- View/download PDF
163. The M1 Muscarinic Receptor Antagonist VU0255035 Delays the Development of Status Epilepticus after Organophosphate Exposure and Prevents Hyperexcitability in the Basolateral Amygdala.
- Author
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Miller SL, Aroniadou-Anderjaska V, Pidoplichko VI, Figueiredo TH, Apland JP, Krishnan JK, and Braga MF
- Subjects
- Animals, Basolateral Nuclear Complex pathology, Basolateral Nuclear Complex physiopathology, Male, Rats, Rats, Sprague-Dawley, Status Epilepticus pathology, Status Epilepticus physiopathology, Synapses drug effects, Synapses pathology, Basolateral Nuclear Complex drug effects, Paraoxon toxicity, Receptor, Muscarinic M1 antagonists & inhibitors, Soman toxicity, Status Epilepticus chemically induced, Status Epilepticus prevention & control, Sulfonamides pharmacology, Thiadiazoles pharmacology
- Abstract
Exposure to organophosphorus toxins induces seizures that progress to status epilepticus (SE), which can cause brain damage or death. Seizures are generated by hyperstimulation of muscarinic receptors, subsequent to inhibition of acetylcholinesterase; this is followed by glutamatergic hyperactivity, which sustains and reinforces seizure activity. It has been unclear which muscarinic receptor subtypes are involved in seizure initiation and the development of SE in the early phases after exposure. Here, we show that pretreatment of rats with the selective M
1 receptor antagonist, VU0255035 [N-(3-oxo-3-(4-(pyridine-4-yl)piperazin-1-yl)propyl)-benzo[c][1,2,5]thiadiazole-4 sulfonamide], significantly suppressed seizure severity and prevented the development of SE for about 40 minutes after exposure to paraoxon or soman, suggesting an important role of the M1 receptor in the early phases of seizure generation. In addition, in in vitro brain slices of the basolateral amygdala (a brain region that plays a key role in seizure initiation after nerve agent exposure), VU0255035 blocked the effects produced by bath application of paraoxon-namely, a brief barrage of spontaneous inhibitory postsynaptic currents, followed by a significant increase in the ratio of the total charge transferred by spontaneous excitatory postsynaptic currents over that of the inhibitory postsynaptic currents. Furthermore, paraoxon enhanced the hyperpolarization-activated cation current Ih in basolateral amygdala principal cells, which could be one of the mechanisms underlying the increased glutamatergic activity, an effect that was also blocked in the presence of VU0255035. Thus, selective M1 antagonists may be an efficacious pretreatment in contexts in which there is risk for exposure to organophosphates, as these antagonists will delay the development of SE long enough for medical assistance to arrive., (Copyright © 2016 by The American Society for Pharmacology and Experimental Therapeutics.)- Published
- 2017
- Full Text
- View/download PDF
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