S-4B orbital workshop attitude control system study

Saturn S-4B orbital workshop attitude control system analysi

A REGIONAL COMPARISON OF RISK-EFFICIENT SOYBEAN MARKETING STRATEGIES

Risk-efficient portfolios from a subset of marketing strategies were identified using Target-MOTAD. Portfolios were generated for Illinois, Arkansas, and South Carolina to determine whether regional price and yield characteristics affected the optimal marketing strategy selection during 1972-1985. The results support previous conclusions that the risk borne when following a combination of marketing strategies was less than the risk of any single marketing strategy examined. The results also show that the marketing strategies representing efficient risk-return combinations for a producer in one region were different from the efficient risk-return combinations for a producer in another region. Therefore, generic marketing advice would have produced results less preferred in one region than in another.Marketing,

Cranial sutures work collectively to distribute strain throughout the reptile skull

The skull is composed of many bones that come together at sutures. These sutures are important sites of growth, and as growth ceases some become fused while others remain patent. Their mechanical behaviour and how they interact with changing form and loadings to ensure balanced craniofacial development is still poorly understood. Early suture fusion often leads to disfiguring syndromes, thus is it imperative that we understand the function of sutures more clearly. By applying advanced engineering modelling techniques, we reveal for the first time that patent sutures generate a more widely distributed, high level of strain throughout the reptile skull. Without patent sutures, large regions of the skull are only subjected to infrequent low-level strains that could weaken the bone and result in abnormal development. Sutures are therefore not only sites of bone growth, but could also be essential for the modulation of strains necessary for normal growth and development in reptiles

“I cannot live without my [tablet]”: children's experiences of using tablet technology within the home

The current study aimed to examine children’s experiences of using tablet technology within the home. Eighteen children aged between eight and nine years old took part in four separate focus group discussions. Thematic analysis revealed three predominant themes: a battle of boundaries, a tool to escape the surrounding world, and an emerging dependency on tablet technology. The data implies that there is a growing dependency on tablet technology use among this age group. The current study also outlines that many children engage in a variety of techniques to circumvent parental limits on their tablet usage. However, other children discussed a lack of clear rules and restrictions for their use of tablet devices. The findings suggest that covert and unregulated use of tablet technology may have a detrimental impact upon children, particularly in relation to reduced social interaction, fatigue and increased family tensions due to excessive usage. Further research of child interactions with a wide variety of digital technology and media is warranted. Such exploration would further our understanding of the potential advantages and disadvantages for such technology use, as well as presenting a pathway to produce more effective guidance on home use

Learning approaches and lecture attendance of medical students

peerreview_statement: The publishing and review policy for this title is described in its Aims & Scope. aims_and_scope_url: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=cjfh2

Decay widths of large-spin mesons from the non-critical string/gauge duality

In this paper, we use the non-critical string/gauge duality to calculate the decay widths of large-spin mesons. Since it is believed that the string theory of QCD is not a ten dimensional theory, we expect that the non-critical versions of ten dimensional black hole backgrounds lead to better results than the critical ones. For this purpose we concentrate on the confining theories and consider two different six dimensional black hole backgrounds. We choose the near extremal AdS6 model and the near extremal KM model to compute the decay widths of large-spin mesons. Then, we present our results from these two non-critical backgrounds and compare them together with those from the critical models and experimental data.Comment: 21 pages and 3 figure

CFT fusion rules, DHR gauge groups, and CAR algebras

It is demonstrated that several series of conformal field theories, while satisfying braid group statistics, can still be described in the conventional setting of the DHR theory, i.e. their superselection structure can be understood in terms of a compact DHR gauge group. Besides theories with only simple sectors, these include (the untwisted part of) c=1 orbifold theories and level two so(N) WZW theories. We also analyze the relation between these models and theories of complex free fermions.Comment: 22 pages, LaTeX2

Ecosystem‐atmosphere exchange of carbon dioxide over a mixed hardwood forest in northern lower Michigan

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95633/1/jgrd10262.pd

Measurement and Prediction of Pressure Drop in Pneumatic Conveying: Effect of Particle Characteristics, Mass Loading, and Reynolds Number

This paper reports the effect of Reynolds number, mass loading, and particle shape and size on pressure drop in a vertical gas-solids pneumatic conveying line. We isolate the effect of one variable while holding all others constant. A commonly used pressure drop correlation and a state-of-the-art multiphase computational fluid dynamics (CFD) models are then assessed by comparing their predictions to experimental data. Deficiencies in the models and the correlation are identified, and possible modifications are proposed. The most notable deficiency is the inability of both the experimental correlation and the CFD model to accurately predict the pressure drop for gas-solids flow with highly aspherical particles