Fluid flow analysis of the SSME high pressure fuel and oxidizer turbine coolant systems

The objective is to provide improved analysis capability for the Space Shuttle Main Engine (SSME) high pressure fuel and oxidizer turbine coolant systems. Each of the systems was analyzed to determine fluid flow rate and thermodynamic and transport properties at all key points in the systems. Existing computer codes were used as a baseline for these analyses. These codes were modified to provide improved analysis capability. The major areas of improvement are listed. A review of the drawings was performed, and pertinent geometry changes were included in the models. Improvements were made in the calculation of thermodynamic and transport properties for a mixture of hydrogen and steam. A one-dimensional turbine model for each system is included as a subroutine to each code. This provides a closed loop analysis with a minimum of required boundary conditions as input. An improved labyrinth seal model is included in the high pressure fuel turbine coolant model. The modifications and the analysis results are presented in detail

Hydrocarbon incorporation into the salt marsh ecosystem from the West Falmouth oil spill

Originally issued as Reference No. 71-69, series later renamed WHOI-.The oil barge "Florida" ran aground just off Little Island, West Falmouth, Massachusetts on September 16, 1969. About 175,000 gallons of Number Two fuel oil leaked into Buzzards Bay and the adjacent Wild Harbor Marsh. This report presents the results of analyses done on marsh muds and organisms collected nearly a year after the spill. We studied the incorporation of polluting hydrocarbons into, and their movement through the marsh ecosystem. Analyses of surface muds agreed well with observations on plant growth. The dead areas were the most heavily polluted. A deep mud core in the dead area showed oil has penetrated to at least 70 cm. Virtually all the marsh organisms living in the contaminated area were affected by the oil at least to the extent that they accumulated oil hydrocarbons in their tissues. Our data suggest that two processes may occur as the oil passes through the marsh ecosystem. There may be a progressive loss in the straight chain hydrocarbons in relation to branched chain, cyclic and aromatic hydrocarbons. There also appears to be a selection for the higher boiling fractions of the contaminants higher up the food chain.Supported by the Bureau of Commercial Fisheries, Fish and Wildlife Service Grant No. 14-17-0007- 1128 (G) and The National Science Foundation Grant No. GA 28365

Parasympathetic functions in children with sensory processing disorder.

The overall goal of this study was to determine if parasympathetic nervous system (PsNS) activity is a significant biomarker of sensory processing difficulties in children. Several studies have demonstrated that PsNS activity is an important regulator of reactivity in children, and thus, it is of interest to study whether PsNS activity is related to sensory reactivity in children who have a type of condition associated with sensory processing disorders termed sensory modulation dysfunction (SMD). If so, this will have important implications for understanding the mechanisms underlying sensory processing problems of children and for developing intervention strategies to address them. The primary aims of this project were: (1) to evaluate PsNS activity in children with SMD compared to typically developing (TYP) children, and (2) to determine if PsNS activity is a significant predictor of sensory behaviors and adaptive functions among children with SMD. We examine PsNS activity during the Sensory Challenge Protocol; which includes baseline, the administration of eight sequential stimuli in five sensory domains, recovery, and also evaluate response to a prolonged auditory stimulus. As a secondary aim we examined whether subgroups of children with specific physiological and behavioral sensory reactivity profiles can be identified. Results indicate that as a total group the children with severe SMD demonstrated a trend for low baseline PsNS activity, compared to TYP children, suggesting this may be a biomarker for SMD. In addition, children with SMD as a total group demonstrated significantly poorer adaptive behavior in the communication and daily living subdomains and in the overall Adaptive Behavior Composite of the Vineland than TYP children. Using latent class analysis, the subjects were grouped by severity and the severe SMD group had significantly lower PsNS activity at baseline, tones and prolonged auditory. These results provide preliminary evidence that children who demonstrate severe SMD may have physiological activity that is different from children without SMD, and that these physiological and behavioral manifestations of SMD may affect a child\u27s ability to engage in everyday social, communication, and daily living skills

HEALTH, TORTS, AND CIVIL PRACTICE Georgia Hospital and Medical Liability Insurance Authority Act: Provide for Legislative Findings with Respect to a Crisis in the Field of Hospital and Medical Liability Insurance; Address This Crisis Through Provision of Insurance and Certain Civil Justice Reforms; Create the Georgia Hospital and Medical Liability Insurance Authority; Provide for the Members of the Authority and Their Selection, Service, and Terms of Office; Provide for the Filling of Vacancies; Provide for the Powers, Duties, Operations, and Financial Affairs of the Authority; Provide for the General Purpose of the Authority; Prescribe Standards Relating to Vicarious Liability of Medical Facilities for Actions of Health Care Providers; Provide for Limited Liability for Certain Medical Facilities and Health Care Providers for Treatment of Certain Emergency Conditions Under Certain Conditions; Provide for Qualifications of Experts; Change Provisions Relating to the Allocation of Liability and Recovery of Damages in Tort Actions; Provide for the Degree of Care Expected of Medical Professionals in an Emergency Room Setting; Provide for the Consideration by the Jury or Other Trier of Fact of Certain Factors Affecting This Care in Determining Whether Defendants Met This Degree or Standard of Care; Require the Approval by the Commissioner of Insurance of All medical Malpractice Rates, Rating Plans, Rating Systems, and underwriting Rules Prior to These Rates, Rating Plans, Rating Systems, and Underwriting Rules Becoming Effective; Change Certain Provisions Relating to Actions Against Certain Codefendants Residing in Different Counties; Change Provisions Relating to the Required Filing of Affidavits in Professional malpractice Actions; Provide for other Related Matters; Repeal Conflicting Laws; and for Other Purposes

The bill would have created an authority with power to provide rural hospitals with the ability to self-ensure. The bill would have allowed emergency facilities to limit liability associated with doctors who are independent contractors. The bill would have also restricted recovery from each defendant based on apportionment of liability rather than the usual joint and several liability schemes. The bill failed after a standoff on an amendment to cap non-economic damages

HEALTH, TORTS, AND CIVIL PRACTICE Georgia Hospital and Medical Liability Insurance Authority Act: Provide for Legislative Findings with Respect to a Crisis in the Field of Hospital and Medical Liability Insurance; Address This Crisis Through Provision of Insurance and Certain Civil Justice Reforms; Create the Georgia Hospital and Medical Liability Insurance Authority; Provide for the Members of the Authority and Their Selection, Service, and Terms of Office; Provide for the Filling of Vacancies; Provide for the Powers, Duties, Operations, and Financial Affairs of the Authority; Provide for the General Purpose of the Authority; Prescribe Standards Relating to Vicarious Liability of Medical Facilities for Actions of Health Care Providers; Provide for Limited Liability for Certain Medical Facilities and Health Care Providers for Treatment of Certain Emergency Conditions Under Certain Conditions; Provide for Qualifications of Experts; Change Provisions Relating to the Allocation of Liability and Recovery of Damages in Tort Actions; Provide for the Degree of Care Expected of Medical Professionals in an Emergency Room Setting; Provide for the Consideration by the Jury or Other Trier of Fact of Certain Factors Affecting This Care in Determining Whether Defendants Met This Degree or Standard of Care; Require the Approval by the Commissioner of Insurance of All medical Malpractice Rates, Rating Plans, Rating Systems, and underwriting Rules Prior to These Rates, Rating Plans, Rating Systems, and Underwriting Rules Becoming Effective; Change Certain Provisions Relating to Actions Against Certain Codefendants Residing in Different Counties; Change Provisions Relating to the Required Filing of Affidavits in Professional malpractice Actions; Provide for other Related Matters; Repeal Conflicting Laws; and for Other Purposes

The bill would have created an authority with power to provide rural hospitals with the ability to self-ensure. The bill would have allowed emergency facilities to limit liability associated with doctors who are independent contractors. The bill would have also restricted recovery from each defendant based on apportionment of liability rather than the usual joint and several liability schemes. The bill failed after a standoff on an amendment to cap non-economic damages

Enhanced External Counterpulsation as a Novel Treatment for Post-acute COVID-19 Sequelae

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the virus responsible for the coronavirus disease 2019 (COVID-19) pandemic. As patients recover from COVID-19, some continue to report persisting symptoms weeks to months after acute infection. These effects have been referred to as post-acute sequelae of SARS-CoV-2 infection (PASC). We report the case of a 38-year-old woman suffering from PASC symptoms following acute COVID-19 in October 2020. During her acute infection phase, she had a home recovery and reported her predominant symptoms as fatigue, headaches, body pain, and shortness of breath. After most of her symptoms were resolved, she continued to have periodic episodes of fatigue and headaches, along with random shortness of breath while at rest and during activities for months beyond the acute phase of the illness. She also noted the presence of “brain fog,” as if lacking the same clarity that she had prior to her illness. These symptoms persisted for three months before the patient underwent enhanced external counterpulsation (EECP) therapy in one-hour sessions, three times per week. This therapy was chosen based on the mechanism of action of EECP benefiting patients with ischemic cardiovascular diseases. After one week, her “brain fog” had improved, with shortness of breath improving after 1.5 weeks. The patient reported returning to pre-COVID health and fitness after approximately five weeks of EECP treatment. To our knowledge, this is the first case of using EECP for post-COVID shortness of breath, fatigue, and “brain fog.

Space Shuttle main engine, powerhead structural modeling, stress and fatigue life analysis. Volume 4: Summary of investigation of unscheduled events and special tasks

Low pressure fuel turbopump turbine labyrinth send tip rubbing analysis, gas dynamic analysis, and HPFTP blade crack and blade impact are presented