The CELSS breadboard project: Plant production

NASA's Breadboard Project for the Controlled Ecological Life Support System (CELSS) program is described. The simplified schematic of a CELSS is given. A modular approach is taken to building the CELSS Breadboard. Each module is researched in order to develop a data set for each one prior to its integration into the complete system. The data being obtained from the Biomass Production Module or the Biomass Production Chamber is examined. The other primary modules, food processing and resource recovery or waste management, are discussed briefly. The crew habitat module is not discussed. The primary goal of the Breadboard Project is to scale-up research data to an integrated system capable of supporting one person in order to establish feasibility for the development and operation of a CELSS. Breadboard is NASA's first attempt at developing a large scale CELSS

Controlled ecological life support system breadboard project, 1988

The Closed Ecological Life Support System (CELSS) Breadboard Project, NASA's effort to develop the technology required to produce a functioning bioregenerative system, is discussed. The different phases of the project and its current status are described. The relationship between the project components are shown, and major project activities for fiscal years 1989 to 1993 are listed. The Biomass Production Chamber (BPC) became operational and tests of wheat as a single crop are nearing completion

Implementation of Scripted Debriefings Following Neonatal Delivery Room Resuscitations

Abstract Background: The functioning of neonatal delivery teams can be affected by technical and non-technical skills of individual team members. The team in this project was challenged by varying knowledge and skill levels and did not have a standardized process for debriefing resuscitation events. The literature shows that debriefings can aid in improving knowledge, skills, teamwork, and communication of resuscitation teams. Purpose: The purpose of this quality improvement project was to implement a scripted, post-resuscitation debriefing with the neonatal delivery team to improve non-technical skills of the resuscitation team and identify challenges to providing optimal care. Method: Scripted, post-resuscitation debriefings were implemented following deliveries of infants that met inclusion criteria. Team members completed Team Emergency Assessment Measure (TEAM) surveys following qualifying resuscitations before and after the intervention period. During the seven-week intervention period, facilitators conducted debriefings and completed debriefing guides that aided in identifying strengths and areas for improvement for the team. Findings: Debriefings were completed following just over half of qualifying delivery room resuscitations. Through completed debriefing guides, team strengths and areas for improvement were identified. Guides also provided a consistent way to communicate items requiring follow up. TEAM survey scores did not improve in the post-intervention period. Follow-up surveys revealed benefits of debriefings and a desire by team members to continue the practice. MeSH terms: medical emergency team, patient care team, hospital rapid response team, neonatal intensive care, resuscitation, communication, evidence-based practic

Monitoring and control technologies for bioregenerative life support systems/CELSS

The development of a controlled Ecological Life Support System (CELSS) will require NASA to develop innovative monitoring and control technologies to operate the different components of the system. Primary effort over the past three to four years has been directed toward the development of technologies to operate a biomass production module. Computer hardware and software required to operate, collect, and summarize environmental data for a large plant growth chamber facility were developed and refined. Sensors and controls required to collect information on such physical parameters as relative humidity, temperature, irradiance, pressure, and gases in the atmosphere; and PH, dissolved oxygen, fluid flow rates, and electrical conductivity in the nutrient solutions are being developed and tested. Technologies required to produce high artificial irradiance for plant growth and those required to collect and transport natural light into a plant growth chamber are also being evaluated. Significant effort was directed towards the development and testing of a membrane nutrient delivery system required to manipulate, seed, and harvest crops, and to determine plant health prior to stress impacting plant productivity are also being researched. Tissue culture technologies are being developed for use in management and propagation of crop plants. Though previous efforts have focussed on development of technologies required to operate a biomass production module for a CELSS, current efforts are expanding to include technologies required to operate modules such as food preparation, biomass processing, and resource (waste) recovery which are integral parts of the CELSS

Are male orangutans a threat to infants? Evidence of mother-offspring counter strategies to infanticide in Bornean orangutans (Pongo pygmaeus wurmbii)

Sexually selected infanticide by males is widespread in primates. Female primates employ a variety of strategies to reduce infanticide risk. While infanticide has never been directly observed in wild orangutans (Pongo spp.), their slow life history makes infants vulnerable to infanticide. The mating strategies of female orangutans include polyandrous and postconceptive mating that may serve to increase paternity confusion, an infanticide avoidance strategy. Here, we investigate whether female orangutans alter their social interactions with males as another infanticide avoidance strategy. We hypothesize that females with younger offspring avoid males and that the distance between mother and offspring decreases in the presence of males. We use long-term behavioral data collected between 1994 and 2016 from Bornean orangutans (Pongo pygmaeus wurmbii) in Gunung Palung National Park, Indonesia, to test whether the sexual selection hypothesis for infanticide helps explain aspects of orangutan social behavior. We found that mothers with offspring 6 yr. old and females without offspring. In addition, the distance between a mother–offspring dyad showed a statistically significant decrease in the presence of males, but not females. Our results are consistent with the hypothesis that female orangutans employ strategies to reduce infanticide risk in their social interactions. Because orangutans have a high fission–fusion dynamic, they have flexibility in manipulating social interactions as a counter-infanticide strategy. Our results suggest that infanticide by males is a selective pressure shaping female orangutan social behavior.Accepted manuscrip

Speech-Language Pathologists and Respiratory Therapists: Team Approach to Caring for Patients with Long-Term Tracheotomy

Background: Recent technological advances, together with growing social acceptance of patients with disabilities, has led to a realization of the importance of long-term management of technologically dependent and chronically ill patients with tracheostomies. This includes tracheostomy patients who are ventilator dependent, neurological patients, patients with severe illness such as stroke, and so forth. These patients are able to have a higher quality of life and communicate verbally due to advances in health care. One of the major advancements is communicating via a tracheostomy. Hence, this study will provide ways in which respiratory therapists (RTs) and speech-language pathologists (SLPs) can work together to make the process more efficient. Aim: The aim of this research article is to focus on a team approach utilizing the skills of speech-language pathologists and respiratory therapists to address communication issues for tracheostomy patients. Method: The authors reviewed historical and contemporary literature and computerized databases, and they also applied their collective 25-plus years of clinical and educational experience in the field. Results: The findings suggest that respiratory therapists and speech-language pathologists can work together to coordinate the most effective approach to helping patients with permanent tracheas regain full speech functionality and social adaptation. Conclusions: Rehabilitation of tracheostomy patients remains an important issue in modern medicine. There are a number of approaches to enhancing vocal speech in tracheostomy patients and ensuring full speech functionality and social adaptation. Successful speech therapies are based on coordinated interaction of respiratory and speech-language pathologists, nurses, caregivers, and patients. Findings regarding speech therapy for tracheostomy patients are based on a limited number of effective and controlled studies (Hess & Altobelli, 2014)

Yasemin Yildiz. Beyond the Mother Tongue: The Postmonolingual Condition. New York: Fordham UP, 2012. 292 pp.

Review of Yasemin Yildiz. Beyond the Mother Tongue: The Postmonolingual Condition. New York: Fordham UP, 2012. 292 pp

Friends in High Places: Measuring the Effects of Compensation Committee Characteristics on CEO Pay Packages in 2013

In the past decade, public scrutiny surrounding rising levels of executive compensation has led to more stringent independence requirements for compensation committees. However, there is little research studying the effects of compensation committees on executive pay from the time these new requirements were implemented. My paper studies the effects of compensation committee chair personal ties to the CEO, economic interests, and group committee characteristics on both the level and structure of CEO compensation. My findings suggest that certain committee chair personal ties to the CEO are associated with both a higher level of CEO compensation and a higher percentage of CEO salary compensation. I also find that the more compensation committee chairs are paid, the less likely they are to create CEO pay plans with strong incentive provisions, but the more likely they are to increase the level of total CEO compensation. The higher the committee chair’s ownership percentage is in the company, the less likely they are to create low-risk CEO pay plans, and the more likely they are to increase the level of total CEO compensation

A study of the response of nonlinear springs

The various phases to developing a methodology for studying the response of a spring-reinforced arch subjected to a point load are discussed. The arch is simply supported at its ends with both the spring and the point load assumed to be at midspan. The spring is present to off-set the typical snap through behavior normally associated with arches, and to provide a structure that responds with constant resistance over a finite displacement. The various phases discussed consist of the following: (1) development of the closed-form solution for the shallow arch case; (2) development of a finite difference analysis to study (shallow) arches; and (3) development of a finite element analysis for studying more general shallow and nonshallow arches. The two numerical analyses rely on a continuation scheme to move the solution past limit points, and to move onto bifurcated paths, both characteristics being common to the arch problem. An eigenvalue method is used for a continuation scheme. The finite difference analysis is based on a mixed formulation (force and displacement variables) of the governing equations. The governing equations for the mixed formulation are in first order form, making the finite difference implementation convenient. However, the mixed formulation is not well-suited for the eigenvalue continuation scheme. This provided the motivation for the displacement based finite element analysis. Both the finite difference and the finite element analyses are compared with the closed form shallow arch solution. Agreement is excellent, except for the potential problems with the finite difference analysis and the continuation scheme. Agreement between the finite element analysis and another investigator's numerical analysis for deep arches is also good

Plan for CELSS test bed project

The Closed Ecological Life Support Systems (CELSS) testbed project will achieve two major goals: It will develop the knowledge and technology needed to build and test biological or combined biological physiochemical regenerative life support systems. It will fabricate, test, and operate ground based facilities to accomplish proof-of-concent testing and evaluation leading to flight experimentation. The project will combine basic research and applied research/engineering to achieve a phased, integrated development of hardware, systems, and techniques for food and oxygen production, food processing, and waste processing in closed systems. The project will design, fabricate, and operate within three years a botanical production system scaled to a sufficient size to verify oxygen and nutrient load production (carbohydrates, fats, proteins) at a useable level. It will develop within five years a waste management system compatible with the botanical production system and a food processing system that converts available biomass into edible products. It will design, construct, and operate within ten years a ground based candidate CELSS that includes man as an active participant in the system. It will design a flight CELSS module within twelve years and construct and conduct initial flight tests within fifteen years