Validity and Reliability of Devices Measuring Countermovement Vertical Jump Performance

The counter-movement jump (CMJ) test is a standard measure of lower body power and can be related to other aspects of athletic performance. With many tools commercially available, it can be difficult for professionals to distinguish which device provides the most accurate results for the best cost. While these devices have been previously validated individually, no past studies have concurrently examined these specific tools. The purpose of this study was to determine the accuracy of four different CMJ measuring devices when compared to the gold standard of a force plate. Thirty-one physically active university students were recruited for this study. Upon completion of a short dynamic warm-up and instruction on proper jumping technique, each participant performed four maximal CMJs on the force plate. They then performed an additional four maximal CMJs in an area where four other instruments were used to measure CMJ simultaneously: accelerometer-based sensor, a contact mat, a photoelectrical cell system, and a mobile device video app. Analysis of the data was conducted, and results showed that while slightly overestimating measurements, the commercial devices that seem to agree the closest to the gold standard force plate were the contact mat and accelerometer-based sensor

The Evolution of Post-Starburst Galaxies from z∼1z\sim1 to the Present

Post-starburst galaxies are in the transitional stage between blue, star-forming galaxies and red, quiescent galaxies, and therefore hold important clues for our understanding of galaxy evolution. In this paper, we systematically searched for and identified a large sample of post-starburst galaxies from the spectroscopic dataset of the Sloan Digital Sky Survey (SDSS) Data Release 9. In total, we found more than 6000 objects with redshifts between $z\sim0.05$ and $z\sim1.3$, making this the largest sample of post-starburst galaxies in the literature. We calculated the luminosity function of the post-starburst galaxies using two uniformly selected subsamples: the SDSS Main Galaxy Sample and the Baryon Oscillation Spectroscopic Survey CMASS Sample. The luminosity functions are reasonably fit by half-Gaussian functions. The peak magnitudes shift as a function of redshift from $M\sim-23.5$ at $z\sim0.8$ to $M\sim-20.3$ at $z\sim0.1$. This is consistent with the downsizing trend, whereby more massive galaxies form earlier than low-mass galaxies. We compared the mass of the post-starburst stellar population found in our sample to the decline of the global star-formation rate and found that only a small amount ($\sim1\%$) of all star-formation quenching in the redshift range $z=0.2-0.7$ results in post-starburst galaxies in the luminosity range our sample is sensitive to. Therefore, luminous post-starburst galaxies are not the place where most of the decline in star-formation rate of the universe is happening.Comment: 26 pages, 24 figures, 8 tables. Accepted for publication in The Astrophysical Journa

Storyteller, Story-Teacher: A Portrait of Three Teachers? Use of Story in Elementary Classes

The purpose of this qualitative study was to investigate the use of storytelling as a teaching strategy in the classrooms of three experienced elementary school teachers. Storytelling is defined in this study as the use of a narrative, spoken or written, in prose or in verse, true or fictitious, related so as to inform, entertain, or instruct the listener or reader. This research answers questions concerning; (a) what constitutes storytelling in these teachers’ classrooms, (b) teachers’ purposes for using storytelling, and (c) factors that have encouraged these teachers to employ storytelling in their teaching practices. Framed within constructivist theory, the study provides insight into how these three respondents teach content through storytelling and bridge information from teller to listener. Data collection included classroom observations, interviews of teacher-participants, and the collection of teacher-generated artifacts such as lesson plans and teacher notes. Portraiture is used as a method for writing up the data in order to record the perspectives and experiences of the participants in this study by documenting their voices, visions, and wisdom in a detailed exploration into the feelings about and use of storytelling in their teaching practices. The instructional strategies reported through this qualitative inquiry support a socio-cognitive interactive model of literacy and demonstrate its importance in learning content in an elementary school environment. The data were analyzed continually through a search for emerging patterns and through constant comparison analysis. The researcher found that the teachers used stories and illustrations in an impromptu manner and that storytelling served both cognitive and affective purposes. Cognitively, storytelling was employed to form connections to students’ prior knowledge and new knowledge being introduced. Storytelling was used as a mnemonic device to help students transfer storied information to new situations. Affectively, storytelling served to engage students in an enlightening and entertaining manner. Students responded to the use of stories through actively participating in classroom discussions and sharing stories of their own. Storytelling assists these teachers in their critical roles as negotiators and facilitators of meaning construction in the text and social context of the classroom

European American Therapist Self-Disclosure in Cross-Cultural Counseling

Eleven European American psychotherapists\u27 use of self-disclosure in cross-cultural counseling was studied using consensual qualitative research. As reasons for self-disclosing, therapists reported the intent to enhance the counseling relationship, acknowledge the role of racism/oppression in clients\u27 lives, and acknowledge their own racist/oppressive attitudes. Results indicated that therapists typically shared their reactions to clients\u27 experiences of racism or oppression and that these self-disclosures typically had positive effects in therapy, often improving the counseling relationship by helping clients feel understood and enabling clients to advance to other important issues

An Improved Heuristic for Intercontinental Ballistic Missile Crew Scheduling

Creating monthly schedules for missile crews is a complex and time-consuming problem. Thousands of events must be scheduled for several hundred missile officers. The rules and regulations governing the problem are numerous, and there are currently no established measures for missile crew schedules. The scheduling software currently available only schedules a fraction of the events. The objectives of this research were to create a rule-based heuristic which could quickly produce feasible or near-feasible schedules, to make the scheduling process paperless, and to develop possible measures of effectiveness for missile crew schedules. The research was successful in each of these areas. Schedules which comply with all rules and regulations were generated by the heuristic. From 95 to 100 percent of the required events were scheduled. The heuristic required from five to 40 seconds to create a schedule using hardware available at a missile wing. Spreadsheets were used to preprocess the data before it was input to the heuristic. This approach made the process paperless. Eight potential objectives which were previously not used as quality measures for missile crew schedules were obtained. These objectives along with those contained in regulations are supported by the rule-based heuristic

Engineered single nucleotide polymorphisms in the mosquito MEK docking site alter Plasmodium berghei development in Anopheles gambiae.

BackgroundSusceptibility to Plasmodium infection in Anopheles gambiae has been proposed to result from naturally occurring polymorphisms that alter the strength of endogenous innate defenses. Despite the fact that some of these mutations are known to introduce non-synonymous substitutions in coding sequences, these mutations have largely been used to rationalize knockdown of associated target proteins to query the effects on parasite development in the mosquito host. Here, we assay the effects of engineered mutations on an immune signaling protein target that is known to control parasite sporogonic development. By this proof-of-principle work, we have established that naturally occurring mutations can be queried for their effects on mosquito protein function and on parasite development and that this important signaling pathway can be genetically manipulated to enhance mosquito resistance.MethodsWe introduced SNPs into the A. gambiae MAPK kinase MEK to alter key residues in the N-terminal docking site (D-site), thus interfering with its ability to interact with the downstream kinase target ERK. ERK phosphorylation levels in vitro and in vivo were evaluated to confirm the effects of MEK D-site mutations. In addition, overexpression of various MEK D-site alleles was used to assess P. berghei infection in A. gambiae.ResultsThe MEK D-site contains conserved lysine residues predicted to mediate protein-protein interaction with ERK. As anticipated, each of the D-site mutations (K3M, K6M) suppressed ERK phosphorylation and this inhibition was significant when both mutations were present. Tissue-targeted overexpression of alleles encoding MEK D-site polymorphisms resulted in reduced ERK phosphorylation in the midgut of A. gambiae. Furthermore, as expected, inhibition of MEK-ERK signaling due to D-site mutations resulted in reduction in P. berghei development relative to infection in the presence of overexpressed catalytically active MEK.ConclusionMEK-ERK signaling in A. gambiae, as in model organisms and humans, depends on the integrity of conserved key residues within the MEK D-site. Disruption of signal transmission via engineered SNPs provides a purposeful proof-of-principle model for the study of naturally occurring mutations that may be associated with mosquito resistance to parasite infection as well as an alternative genetic basis for manipulation of this important immune signaling pathway

Preliminary Geologic Description Mobil Producing G.E. Cargill No.14

Two intervals of the Travis Peak Formation were cored in the Mobil Producing Cargill No. 14 well, Waskom field, Harrison County, Texas. Core was recovered from 5,903.0 to 5,960.4 ft and from 6,148.0 to 6,297.1 ft. The top of the Travis Peak is at 5,901 ft (log depth), so the core begins close to the top of the formation.Bureau of Economic Geolog