Determination of Operating Conditions and the Impact on Integrally Geared Centrifugal Air Compressor Selection and Performance

TutorialThis tutorial will provide several examples of how a users specified conditions impact the selection of the compressor along with discussions of how providing well-realized conditions can help reduce the compressors power consumption. The tutorial will also discuss the flexibility and limitations centrifugal compressor manufacturers have in meeting various operating conditions through the selection of aerodynamic hardware and the inlet control valve including variable inlet guide vanes. Finally, the paper will provide input from an end user of centrifugal air compressors offering their point of view of the conditions provided and the compressed air solutions they need. The overarching goal is to better educate end users and purchasers of centrifugal air compressors so they can make more informed requests and obtain machinery that more efficiently meets their year-round needs

The association between ADHD and eating disorders/pathology in adolescents: A systematic review

Background: Attention-Deficit/Hyperactivity Disorder (ADHD), one of the most common neurodevelopmental conditions of childhood, is associated with high rates of mood and behavioral disorders. Preliminary evidence suggests that ADHD may also be associated with eating disorders (ED) or eating pathology (EP). This systematic review synthesizes the extant published literature on this association among youth ages 12 - 21 years. Methods: Literature searches were performed using Medline, Ovid/Psych Info, Google Scholar, and via manual inspection of bibliographies. Crosssectional, case-control, and prospective studies published in English with sample sizes larger than 50, participant ages 12 - 21 years, and assessed ADHD and ED or EP, were considered for review. Case reports, feeding, and drug studies were excluded. Results: Preliminary searches yielded 337 articles; eight articles met inclusion/exclusion criteria. Two studies documented an association between ADHD and ED, and three studies found an association between ADHD and EP. Youth with ADHD were nearly 3 to 6 times more likely to develop an ED than youth without ADHD, and were also more likely to have higher rates of EP, body dissatisfaction, and desire to lose weight/ drive for thinness. Impulsivity was predictive of EP, and ADHD youth with co-occurring mood/behavioral disorders and punitive parental relationships were at higher risk. Conclusions: Five of eight studies documented an association between ADHD and ED or EP in adolescents. Future research is needed to confirm and refine further these findings. The findings have clinical implications, including the inclusion of ED/EP in screening and anticipatory guidance efforts. Evaluating whether medical management of ADHD may be efficacious in preventing and/or treating ED/EP is also warranted

Compilation and Analysis of Web-Based Orthopedic Personalized Predictive Tools: A Scoping Review

Web-based personalized predictive tools in orthopedic surgery are becoming more widely available. Despite rising numbers of these tools, many orthopedic surgeons may not know what tools are available, how these tools were developed, and how they can be utilized. The aim of this scoping review is to compile and synthesize the profile of existing web-based orthopedic tools. We conducted two separate PubMed searches-one a broad search and the second a more targeted one involving high impact journals-with the aim of comprehensively identifying all existing tools. These articles were then screened for functional tool URLs, methods regarding the tool\u27s creation, and general inputs and outputs required for the tool to function. We identified 57 articles, which yielded 31 unique web-based tools. These tools involved various orthopedic conditions (e.g., fractures, osteoarthritis, musculoskeletal neoplasias); interventions (e.g., fracture fixation, total joint arthroplasty); outcomes (e.g., mortality, clinical outcomes). This scoping review highlights the availability and utility of a vast array of web-based personalized predictive tools for orthopedic surgeons. Increased awareness and access to these tools may allow for better decision support, surgical planning, post-operative expectation management, and improved shared decision-making

Determination of Operating Conditions and the Impact on Integrally Geared Centrifugal Air Compressor Selection and Performance

TutorialThis tutorial will provide several examples of how a users specified conditions impact the selection of the compressor along with discussions of how providing well-realized conditions can help reduce the compressors power consumption. The tutorial will also discuss the flexibility and limitations centrifugal compressor manufacturers have in meeting various operating conditions through the selection of aerodynamic hardware and the inlet control valve including variable inlet guide vanes. Finally, the paper will provide input from an end user of centrifugal air compressors offering their point of view of the conditions provided and the compressed air solutions they need. The overarching goal is to better educate end users and purchasers of centrifugal air compressors so they can make more informed requests and obtain machinery that more efficiently meets their year-round needs

Author Correction: A consensus-based transparency checklist.

An amendment to this paper has been published and can be accessed via a link at the top of the paper

A consensus-based transparency checklist

We present a consensus-based checklist to improve and document the transparency of research reports in social and behavioural research. An accompanying online application allows users to complete the form and generate a report that they can submit with their manuscript or post to a public repository

Mesenchymal inflammation drives genotoxic stress in hematopoietic stem cells and predicts disease evolution in human pre-leukemia

Mesenchymal niche cells may drive tissue failure and malignant transformation in the hematopoietic system but the molecular mechanisms and their relevance to human disease remain poorly defined. Here, we show that perturbation of mesenchymal cells in a mouse model of the preleukemic disorder Shwachman-Diamond syndrome induces mitochondrial dysfunction, oxidative stress and activation of DNA damage responses in hematopoietic stem and progenitor cells. Massive parallel RNA sequencing of highly purified mesenchymal cells in the mouse model and a range of human preleukemic syndromes identified p53-S100A8/9-TLR inflammatory signaling as a common driving mechanism of genotoxic stress. Transcriptional activation of this signaling axis in the mesenchymal niche predicted leukemic evolution and progression-free survival in myelodysplastic syndrome, the principal leukemia predisposition syndrome. Collectively, our findings reveal a concept of mesenchymal niche-induced genotoxic stress in heterotypic stem and progenitor cells through inflammatory signaling as an actionable determinant of disease outcome in human preleukemia

A Meta-analysis of Multiple Myeloma Risk Regions in African and European Ancestry Populations Identifies Putatively Functional Loci

Genome-wide association studies (GWAS) in European populations have identified genetic risk variants associated with multiple myeloma (MM)

Contemporary management of cancer of the oral cavity

Oral cancer represents a common entity comprising a third of all head and neck malignant tumors. The options for curative treatment of oral cavity cancer have not changed significantly in the last three decades; however, the work up, the approach to surveillance, and the options for reconstruction have evolved significantly. Because of the profound functional and cosmetic importance of the oral cavity, management of oral cavity cancers requires a thorough understanding of disease progression, approaches to management and options for reconstruction. The purpose of this review is to discuss the most current management options for oral cavity cancers

European and multi-ancestry genome-wide association meta-analysis of atopic dermatitis highlights importance of systemic immune regulation

Atopic dermatitis (AD) is a common inflammatory skin condition and prior genome-wide association studies (GWAS) have identified 71 associated loci. In the current study we conducted the largest AD GWAS to date (discovery N = 1,086,394, replication N = 3,604,027), combining previously reported cohorts with additional available data. We identified 81 loci (29 novel) in the European-only analysis (which all replicated in a separate European analysis) and 10 additional loci in the multi-ancestry analysis (3 novel). Eight variants from the multi-ancestry analysis replicated in at least one of the populations tested (European, Latino or African), while two may be specific to individuals of Japanese ancestry. AD loci showed enrichment for DNAse I hypersensitivity and eQTL associations in blood. At each locus we prioritised candidate genes by integrating multi-omic data. The implicated genes are predominantly in immune pathways of relevance to atopic inflammation and some offer drug repurposing opportunities.</p