Two-stage reusable launch system utilizing a winged core vehicle and glideback boosters

A near-term technology launch system is described in which Space Shuttle main engines are used on a manned orbiter and also on twin strap-on unmanned boosters. The orbiter has a circular body and clipped delta wings. The twin strap-on boosters have a circular body and deployable oblique wings for a glideback recovery. The dry and gross weights of the system, capable of delivering 70klb of cargo to orbit, are compared with a similar system with hydrocarbon-fueled boosters and with the current Shuttle

Milena : March and Two Step

https://digitalcommons.library.umaine.edu/mmb-ps/1341/thumbnail.jp

Is there Really a When-Issued Premium?

We use a unique set of equities in the when-issued market to provide new tests of the law of one price in financial markets. We compare the prices of when-issued and regular-way shares of publicly-traded subsidiaries and their parents around the time the subsidiaries are fully divested. In contrast to prior analyses of when-issued trading in equity markets, we find that the when-issued shares of the subsidiary trade at a discount. Some of the pricing differences stem from measurement factors such as exchange location and bid-ask clustering that bias the observed when-issued pricing differential away from zero. The remaining difference between the when-issued and regular-way prices is due to asymmetric movements in bid and ask quotes in the two markets. We also find evidence of temporary price pressures on the date of execution of the spinoff of the subsidiary firms that bear resemblance to the pricing in the when-issued market. We interpret the evidence as consistent with the law of one price in the presence of transaction costs.Law of One Price; Market Efficiency; Market Microstructure

Artificial aquifer recharge in the Colorado portion of the Ogallala Aquifer

November 1984.Bibliography: pages 24-25

Reflections on Transpersonal Psychology’s 40th Anniversary, Ecopsychology, Transpersonal Science, and Psychedelics: A Conversation Forum

Recollections of humanistic and transpersonal psychology’s origin’s morph into the pros and cons of humanistic/transpersonal oriented schools developing APA accredited clinical programs. This discussion dovetails with the question will ATP ever become an APA division, raising an interesting alternative for those of us considering a career in counseling: becoming a spiritual coach. Enter the issue of psychedelic therapy and the Supreme Courts decision to allow ayahuasca as a sacrament by the Uniao Do Vegetal Church, and the importance of why humanistic and transpersonal psychology need to clearly map out the territories and sub-divisions of science and religion. Finally this conversation raises a concern, that Maslow’s call for a “trans-human” psychology sought to encourage creating what we now call ecopsychology

M-type potassium currents differentially affect activation of motoneuron subtypes and tune recruitment gain

Funding: Royal Society: NIF/R1/180091; Wellcome Trust: 204821/Z/16/Z; Canadian Institute for Health Research: 202012MFE – 459188 – 297534.The size principle is a key mechanism governing the orderly recruitment of motor units and is believed to be dependent on passive properties of the constituent motoneurons. However, motoneurons are endowed with voltage-sensitive ion channels that create non-linearities in their input-output functions. Here we describe a role for the M-type potassium current, conducted by KCNQ channels, in the control of motoneuron recruitment in mice. Motoneurons were studied with whole-cell patch clamp electrophysiology in transverse spinal slices and identified based on delayed (fast) and immediate (slow) onsets of repetitive firing. M-currents were larger in delayed compared to immediate firing motoneurons, which was not reflected by variations in the presence of Kv7.2 or Kv7.3 subunits. Instead, a more depolarized spike threshold in delayed-firing motoneurons afforded a greater proportion of the total M-current to become activated within the subthreshold voltage range, which translated to a greater influence on their recruitment with little influence on their firing rates. Pharmacological activation of M-currents also influenced motoneuron recruitment at the population level, producing a rightward shift in the recruitment curve of monosynaptic reflexes within isolated mouse spinal cords. These results demonstrate a prominent role for M-type potassium currents in regulating the function of motor units, which occurs primarily through the differential control of motoneuron subtype recruitment. More generally, these findings highlight the importance of active properties mediated by voltage-sensitive ion channels in the differential control of motoneuron recruitment, which is a key mechanism for the gradation of muscle force.Publisher PDFPeer reviewe

Dual therapy strategies for COPD: the scientific rationale for LAMA + LABA

Chronic obstructive pulmonary disease (COPD) is a leading cause of morbidity, mortality, and health care expenditure worldwide. Relaxation of airway smooth muscle with inhaled bronchodilators is the cornerstone of treatment for stable COPD, with inhaled corticosteroids reserved for those with a history of exacerbations. Tiotropium has occupied center stage in COPD treatment for over 10 years and improves lung function, quality of life, exercise endurance, and reduces the risk of COPD exacerbation. Long-acting β2-agonists (LABAs) improve lung function, reduce dynamic hyperinflation, increase exercise tolerance, health-related quality of life, and reduce acute exacerbation of COPD. The combination of long-acting muscarinic antagonists (LAMAs) and LABAs is thought to leverage different pathways to induce bronchodilation using submaximal drug doses, increasing the benefits and minimizing receptor-specific side effects. Umeclidinium/vilanterol is the first combination of LAMA/LABA to be approved for use in stable COPD in USA and Europe. Additionally, indacaterol/glycopyrronium and aclidinium/formoterol have been approved in Europe and in numerous locations outside USA. Several other agents are in the late stages of development, most of which offer once-daily dosing. The benefits of new LAMA/LABA combinations include improved pulmonary function, dyspnea, and health-related quality of life, and in some cases, reduced exacerbations. These evolving treatments will provide new opportunities and challenges in the management of COPD

Institutional Critique: A Rhetorical Methodology for Change

We offer institutional critique as an activist methodology for changing institutions. Since institutions are rhetorical entities, rhetoric can be deployed to change them. In its effort to counter oppressive institutional structures, the field of rhetoric and composition has focused its attention chiefly on the composition classroom, on the department of English, and on disciplinary forms of critique. Our focus shifts the scene of action and argument to professional writing and to public discourse, using spatial methods adapted from postmodern geography and critical theory

Lateral dispersion over the continental shelf: Analysis of dye-release experiments.

Abstract. Lateral dispersion over the continental shelf was examined using dye studies performed as a part of the Coastal Mixing and Optics experiment. Four experiments performed at intermediate depths, each lasting 2.5-5 days, were examined. In some cases the dye patches remained fairly homogeneous both vertically and horizontally throughout an experiment. In other cases, significant patchiness was observed on scales ranging from 2 to 10 m vertically and a few hundred meters to a few kilometers horizontally. The observations showed that the dye distributions were significantly influenced by shearing and straining on scales of 5-10 m in the vertical and 1-10 km in the horizontal. Superimposed on these larger