Design knowledge capture for a corporate memory facility

Currently, much of the information regarding decision alternatives and trade-offs made in the course of a major program development effort is not represented or retained in a way that permits computer-based reasoning over the life cycle of the program. The loss of this information results in problems in tracing design alternatives to requirements, in assessing the impact of change in requirements, and in configuration management. To address these problems, the problem was studied of building an intelligent, active corporate memory facility which would provide for the capture of the requirements and standards of a program, analyze the design alternatives and trade-offs made over the program's lifetime, and examine relationships between requirements and design trade-offs. Early phases of the work have concentrated on design knowledge capture for the Space Station Freedom. Tools are demonstrated and extended which helps automate and document engineering trade studies, and another tool is being developed to help designers interactively explore design alternatives and constraints

Grazing Rates of Calanus finmarchicus on Thalassiosira weissflogii Cultured under Different Levels of Ultraviolet Radiation

UVB alters photosynthetic rate, fatty acid profiles and morphological characteristics of phytoplankton. Copepods, important grazers of primary production, select algal cells based upon their size, morphological traits, nutritional status, and motility. We investigated the grazing rates of the copepod Calanus finmarchicus on the diatom Thalassiosira weissflogii cultured under 3 levels of ultraviolet radiation (UVR): photosynthetically active radiation (PAR) only (4 kJ-m−2/day), and PAR supplemented with UVR radiation at two intensities (24 kJ-m−2/day and 48 kJ-m−2/day). There was no significant difference in grazing rates between the PAR only treatment and the lower UVR treatment. However, grazing rates were significantly (∼66%) higher for copepods feeding on cells treated with the higher level of UVR. These results suggest that a short-term increase in UVR exposure results in a significant increase in the grazing rate of copepods and, thereby, potentially alters the flow rate of organic matter through this component of the ecosystem

Health Professional Training and Capacity Strengthening Through International Academic Partnerships: The First Five Years of the Human Resources for Health Program in Rwanda

Abstract Background: The Rwanda Human Resources for Health Program (HRH Program) is a 7-year (2012-2019) health professional training initiative led by the Government of Rwanda with the goals of training a large, diverse, and competent health workforce and strengthening the capacity of academic institutions in Rwanda. Methods: The data for this organizational case study was collected through official reports from the Rwanda Ministry of Health (MoH) and 22 participating US academic institutions, databases from the MoH and the College of Medicine and Health Sciences (CMHS) in Rwanda, and surveys completed by the co-authors. Results: In the first 5 years of the HRH Program, a consortium of US academic institutions has deployed an average of 99 visiting faculty per year to support 22 training programs, which are on track to graduate almost 4600 students by 2019. The HRH Program has also built capacity within the CMHS by promoting the recruitment of Rwandan faculty and the establishment of additional partnerships and collaborations with the US academic institutions. Conclusion: The milestones achieved by the HRH Program have been substantial although some challenges persist. These challenges include adequately supporting the visiting faculty; pairing them with Rwandan faculty (twinning); ensuring strong communication and coordination among stakeholders; addressing mismatches in priorities between donors and implementers; the execution of a sustainability strategy; and the decision by one of the donors not to renew funding beyond March 2017. Over the next 2 academic years, it is critical for the sustainability of the 22 training programs supported by the HRH Program that the health-related Schools at the CMHS significantly scale up recruitment of new Rwandan faculty. The HRH Program can serve as a model for other training initiatives implemented in countries affected by a severe shortage of health professionals

Assessing retention in care after 12 months of the Pediatric Development Clinic implementation in rural Rwanda: a retrospective cohort study

Background: In Africa, a high proportion of children are at risk for developmental delay. Early interventions are known to improve outcomes, but they are not routinely available. The Rwandan Ministry of Health with Partners In Health/Inshuti Mu Buzima created the Pediatric Development Clinic (PDC) model for providing interdisciplinary developmental care for high-risk infants in rural settings. As retention for chronic care has proven challenging in many settings, this study assesses factors related to retention to care after 12 months of clinic enrollment. Methods: This study describes a retrospective cohort of children enrolled for 12 months in the PDC program in Southern Kayonza district between April 2014–March 2015. We reviewed routinely collected data from electronic medical records and patient charts. We described patient characteristics and the proportion of patients retained, died, transferred out or lost to follow up (LTFU) at 12 months. We used Fisher’s exact test and multivariable logistic regression to identify factors associated with retention in care. Results: 228 children enrolled in PDC from 1 April 2014–31 March 2015, with prematurity/low birth weight (62.2%) and hypoxic ischemic encephalopathy (34.5%) as the most frequent referral diagnoses. 64.5% of children were retained in care and 32.5% were LTFU after 12 months. In the unadjusted analysis, we found male sex (p = 0.189), having more children at home (p = 0.027), health facility of first visit (p = 0.006), having a PDC in the nearest health facility (p = 0.136), referral in second six months of PDC operation (p = 0.006), and social support to be associated (100%, p < 0.001) with retention after 12 months. In adjusted analysis, referral in second six months of PDC operation (Odds Ratio (OR) 2.56, 95% CI 1.36, 4.80) was associated with increased retention, and being diagnosed with more complex conditions (trisomy 21, cleft lip/palate, hydrocephalus, other developmental delay) was associated with LTFU (OR 0.34, 95% CI 0.15, 0.76). As 100% of those receiving social support were retained in care, this was not able to be assessed in adjusted analysis. Conclusions: PDC retention in care is encouraging. Provision of social assistance and decentralization of the program are major components of the delivery of services related to retention in care

Daily irradiance of UVB, UVA and PAR provided to <i>Thalassiosira weissflogii</i> cultures used as food for <i>Calanus finmarchicus</i>.

<p>Algal cultures received one of three treatments: PAR-only (PAR), PAR plus ambient UVR levels and PAR plus enhanced UVR (UVR+).</p

Spectral irradiance for the 3 treatments: PAR (solid line), PAR plus ambient UVR (dotted line), and PAR plus enhanced UVR (dashed line) measured inside the Teflon bags that were used for culturing the algae.

<p>Spectral irradiance for the 3 treatments: PAR (solid line), PAR plus ambient UVR (dotted line), and PAR plus enhanced UVR (dashed line) measured inside the Teflon bags that were used for culturing the algae.</p

The number of cells (left axis) and volume of cells ingested by <i>Calanus finmarchicus</i> feeding on <i>Thalassiosira weissflogii</i>.

<p>Algae were cultured under one of 3 different light treatments: PAR only (PAR; Treatment 1), PAR plus ambient UVR (UV; Treatment 2), or PAR plus enhanced UVR (UV+; Treatment 3). Grazing rates were measured over a 48 h feeding cycle. Ingestion rates were significantly higher in the UV+ treatment. No significant difference was found in the grazing rates between the PAR- and ambient-UV-treated cells. Lower case letters indicate homogeneous groups after the ANOVA and post-hoc test (see methods for details).</p

Genome-wide identification of autosomal genes with allelic imbalance of chromatin state

In mammals, monoallelic gene expression can result from X-chromosome inactivation, genomic imprinting, and random monoallelic expression (RMAE). Epigenetic regulation of RMAE is not fully understood. Here we analyze allelic imbalance in chromatin state of autosomal genes using ChIP-seq in a clonal cell line. We identify approximately 3.7% of autosomal genes that show significant differences between chromatin states of two alleles. Allelic regulation is represented among several functional gene categories including histones, chromatin modifiers, and multiple early developmental regulators. Most cases of allelic skew are produced by quantitative differences between two allelic chromatic states that belong to the same gross type (active, silent, or bivalent). Combinations of allelic states of different types are possible but less frequent. When different chromatin marks are skewed on the same gene, their skew is coordinated as a result of quantitative relationships between these marks on each individual allele. Finally, combination of allele-specific densities of chromatin marks is a quantitative predictor of allelic skew in gene expression