bluuebunny/crossref_metadata_2025 huggingface dataset:
Long non‐coding RNAs in motor neuron development and disease
Authors: Vangoor Vamshidhar R. , Gomes‐Duarte Andreia , Pasterkamp R. Jeroen
Published: September 2020

Long non‐coding RNAs (lncRNAs) are RNAs that exceed 200 nucleotides in length and that are not translated into proteins. Thousands of lncRNAs have been identified with functions in processes such as transcription and translation regulation, RNA processing, and RNA and protein sponging. LncRNAs show prominent expression in the nervous system and have been implicated in neural development, function and disease. Recent work has begun to report on the expression and roles of lncRNAs in motor neurons (MNs). The cell bodies of MNs are located in cortex, brainstem or spinal cord and their axons project into the brainstem, spinal cord or towards peripheral muscles, thereby controlling important functions such as movement, breathing and swallowing. Degeneration of MNs is a pathological hallmark of diseases such as amyotrophic lateral sclerosis and spinal muscular atrophy. LncRNAs influence several aspects of MN development and disruptions in these lncRNA‐mediated effects are proposed to contribute to the pathogenic mechanisms underlying MN diseases (MNDs). Accumulating evidence suggests that lncRNAs may comprise valuable therapeutic targets for different MNDs. In this review, we discuss the role of lncRNAs (including circular RNAs [circRNAs]) in the development of MNs, discuss how lncRNAs may contribute to MNDs and provide directions for future research.

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Chinese investment in the Brazilian soybean sector: Navigating relations of private governance
Authors: Peine Emelie K.
Published: September 2020

This paper examines how Chinese agribusiness firms are engaging with established systems of private governance in the Brazilian soybean sector and how that engagement is variously accommodated, contested, and configured by local realities that reflect the uneven history of transnational agribusiness development across the Brazilian agro‐export region. Using qualitative data collected at three research sites that represent different historical moments in the Brazilian agro‐export region (Mato Grosso, Goiás, and Bahia), the paper argues that the social structures underlying the particular agrarian histories of these three subregions create unique contexts Chinese firms must navigate, which in turn shapes their engagement with the private agribusiness regime across space. Although the private agribusiness regime is often portrayed as a top‐down system of governance that subjugates the polity to the demands of capital, this framing neglects to understand how that system of power is contested, negotiated, and reshaped on the ground. These three cases serve to historicize the uneven penetration of Chinese firms across the Brazilian soybean sector.
In vivo and in vitro hair growth‐promoting effect of silver and iron nanoparticles synthesized via Blumea eriantha DC plant extract
Authors: Chavan Rohankumar R. , Bhinge Somnath D. , Bhutkar Mangesh A. , Randive Dheeraj S. , Wadkar Ganesh H. , Todkar Sachin S.
Published: September 2020

Background

Blumea eriantha DC is the Indian medicinal remedy, mainly distributed in the States of India. It possesses wide array of medicinal properties.

Aim

To execute green synthesis approach for the preparation of silver and iron nanoparticles by using alcoholic Blumea ErianthaDC extract and to verify the biological potential of the prepared nanoparticles as a hair growth promoter.

Patients/Method

Extract was mixed with silver nitrate and ferric chloride for synthesis of silver and iron nanoparticles, respectively. Prepared nanoparticles were confirmed by UV, FT‐IR, SEM, X‐ray diffraction, and TEM. The qualitative and quantitative analysis was performed namely hair growth initiation, hair growth completion, hair length, hair weight, histopathological studies, skin thickness, and length of the hair follicle.

Results

The prepared nanoparticles were observed as a blend of spherical and irregular shape with an average particle size of 35nm. The transition of anagen hair follicles was observed in approximately 63.43 % of animals treated with Minoxidil, whereas 2% and 5% Blumea erianthasilver nanoparticles treated animal group exhibited 33.02% and 60.93%, respectively. The animal groups treated with 2% and 5% iron nanoparticles of Blumea Eriantha showed 44.09 and 38.89% in anagen induction, respectively, which suggest the hair growth‐promoting potential of the extract of Blumea erianthaDC.

Conclusion

Thus, it can be concluded that silver nanoparticles of Blumea Eriantha exhibit promising hair growth promoting activity.
Effects of two zinc supplementation levels and two zinc and copper sources with different solubility characteristics on the growth performance, carcass characteristics and digestibility of growing‐finishing pigs
Authors: Villagómez‐Estrada Sandra , Pérez José Francisco , van Kuijk Sandra , Melo‐Durán Diego , Karimirad Razzagh , Solà‐Oriol David
Published: September 2020

The present study was conducted to evaluate the effect of two Zn supplemented levels and two Zn and Cu sources (sulphate and hydroxychloride) on growing‐finishing pigs. An in vitro study and an in vivo study were conducted. In the in vitro study, Zn solubility from each source at different Zn supplementation levels was evaluated, as well as the phytic phosphorus (PP) solubility derived from the interaction or not with phytic acid at similar conditions to those found in digestive tract. The most critical interaction of Zn with phytic acid was at pH 6.5 and with Zn sulphate, resulting in the reduction in PP solubility. In the in vivo experiment, a total of 444 pigs ([Duroc × Landrace]×Pietrain; initial BW: 18.7 ± 0.20 kg) were allotted to 36 pens in a randomized complete block design (2 × 2) factorial arrangement with two Zn and Cu sources and two Zn supplemental levels (20 and 80 mg/kg). The Cu supplementation was fixed at 15 mg/kg for all diets. There was no effect of the interaction between mineral source × Zn level or Zn level on growth performance or carcass characteristics (p > .10). Apparent total digestibility of Zn and Cu along with carcass yield was higher for pigs fed hydroxychloride than pigs fed the sulphate counterparts (p < .05). Feeding low levels of Zn decreased Zn (45.5%;p< .0001) and Cu(18.5%;p = .018) faecal excretion. In conclusion, under commercial conditions, feeding growing‐finishing pigs with Zn levels below those established by the European Union regulation did not affect growth performance and carcass characteristics. Reducing dietary mineral (Zn and Cu) diet content resulted in a lower faecal mineral excretion. Pigs fed sulphate minerals had an improved performance during grower period, while pigs fed hydroxychloride minerals showed an improved performance during finishing period and a greater carcass yield and mineral digestibility than those fed sulphates.
Physical activity and fitness: The feasibility and preliminary effectiveness of wearable activity tracker technology incorporating altruistic motivation in youth
Authors: Duck Angela A. , Hall Katherine C. , Klamm Melissa , Temple Melissa , Robinson Jennifer C.
Published: September 2020

Purpose

The purpose of this study was to examine the feasibility and preliminary effectiveness of using wearable activity tracker technology, integrated with altruistic motivation in children to increase physical activity (PA), fitness, and prosocial behavior.

Design and Methods

A quasiexperimental design was employed in two 4th grade classrooms in a rural southern state. The intervention was a wearable PA tracker and a web‐based curriculum with activities to earn power points redeemable to provide life‐saving food to undernourished kids internationally. Seventeen children in the intervention group participated in the 10‐week PA program and 18 children were in the wait listed control group. Three measures were assessed in both groups at baseline and postintervention: (a) PA measured with accelerometers, (b) fitness levels measured with shuttle run, and (c) prosocial behavior measured with Strengths and Difficulties questionnaire.

Results

Of the 35 children enrolled, the majority were nine years old (n = 28), black (n = 31) and female (n = 23). An overall enrollment rate of 88%, attrition rate of 9%, and an accelerometer noncompliance rate of 25% was determined to assess feasibility. There was no statistical significance between the control and intervention group outcome variables. The average minutes of PA in the control group decreased 8 min from baseline to postintervention (p = .05). In the intervention group, PA decreased by 10 min from baseline to postintervention (p = .12). In both the control and intervention groups, prosocial behavior scores decreased (p = .09 control; p = .62 intervention). The fitness scores, VO2 max, did not significantly change (intervention p = .21; control p = .35).

Practice Implications

Developing effective interventions that foster PA and dissuade sedentary behaviors are essential to enhancing PA and fitness levels. The recruitment, retention, and accelerometer wear adherence suggest this setting, with this population is feasible. The intervention is deliverable, however, the potential of wearable activity trackers and the effect of prosocial behavior that benefits others in increasing PA and improving cardiorespiratory fitness, should be further researched by building on the successful elements of this study.
Linguistics for high schoolers: A summer camp model
Authors: McGory Julia Tevis , Barlew Jefferson
Published: September 2020

Summer Linguistics Institute for Youth Scholars (SLIYS), held on The Ohio State University campus, offers intensive courses in linguistics to high school students from Ohio and around the world. Each year, nearly 100 students participate in 1‐ or 2‐week‐long camps where they engage in the scientific study of language and experience a realistic introduction to academics and university life. The programme's objectives are to provide students with the linguistic tools needed to understand their native language, become better learners of a foreign language and investigate unknown languages. Beyond academics, the high school camp immerses students into university life in a controlled environment providing a non‐threatening experience in academia to students unfamiliar with college. This article describes the evolution of SLIYS and its current incarnation, specifically how and why it works. We discuss the goals of the programme, the structure of SLIYS and how it is sustained, how the programme is assessed, and finally we share information about the general cost of the programme and our recruiting efforts that ensure that SLIYS continues in future years.
Genomic signatures of convergent adaptation to Alpine environments in three Brassicaceae species
Authors: Rellstab Christian , Zoller Stefan , Sailer Christian , Tedder Andrew , Gugerli Felix , Shimizu Kentaro K. , Holderegger Rolf , Widmer Alex , Fischer Martin C.
Published: September 2020

It has long been discussed to what extent related species develop similar genetic mechanisms to adapt to similar environments. Most studies documenting such convergence have either used different lineages within species or surveyed only a limited portion of the genome. Here, we investigated whether similar or different sets of orthologous genes were involved in genetic adaptation of natural populations of three related plant species to similar environmental gradients in the Alps. We used whole‐genome pooled population sequencing to study genome‐wide SNP variation in 18 natural populations of three Brassicaceae (Arabis alpina, Arabidopsis halleri, and Cardamine resedifolia) from the Swiss Alps. We first de novo assembled draft reference genomes for all three species. We then ran population and landscape genomic analyses with ~3 million SNPs per species to look for shared genomic signatures of selection and adaptation in response to similar environmental gradients acting on these species. Genes with a signature of convergent adaptation were found at significantly higher numbers than expected by chance. The most closely related species pair showed the highest relative over‐representation of shared adaptation signatures. Moreover, the identified genes of convergent adaptation were enriched for nonsynonymous mutations, suggesting functional relevance of these genes, even though many of the identified candidate genes have hitherto unknown or poorly described functions based on comparison with Arabidopsis thaliana. We conclude that adaptation to heterogeneous Alpine environments in related species is partly driven by convergent evolution, but that most of the genomic signatures of adaptation remain species‐specific.
From time asymmetry to quantum entanglement: The Humean unification
Authors: Chen Eddy Keming
Published: September 2020

Two of the most difficult problems in the foundations of physics are (1) what gives rise to the arrow of time and (2) what the ontology of quantum mechanics is. I propose a unified ‘Humean’ solution to the two problems. Humeanism allows us to incorporate the Past Hypothesis and the Statistical Postulate into the best system, which we then use to simplify the quantum state of the universe. This enables us to confer the nomological status to the quantum state in a way that adds no significant complexity to the best system and solves the “supervenient‐kind problem” facing the original version of the Past Hypothesis. We call the resultant theory the Humean unification. It provides a unified explanation of time asymmetry and quantum entanglement. On this theory, what gives rise to time's arrow is also responsible for quantum phenomena. The new theory has a separable mosaic, a best system that is simple and non‐vague, less tension between quantum mechanics and special relativity, and a higher degree of theoretical and dynamical unity. The Humean unification leads to new insights that can be useful to Humeans and non‐Humeans alike.
Long‐term Inhibition of Soleus H‐reflex with Epidural Adhesiolysis and Pulsed Radiofrequency in Lumbosacral Neuropathic Pain
Authors: Vigneri Simone , Sindaco Gianfranco , La Grua Marco , Zanella Matteo , Paci Valentina , Vinci Francesca Maria , Sciacca Chiara , Merlini Alberto , Pari Gilberto
Published: September 2020

Introduction

Scientific data about neurophysiological changes subsequent to pulsed radiofrequency (PRF) are still lacking. The goal of this study was to evaluate sural nerve conduction and Hoffmann reflex (H‐reflex) in soleus muscle following adhesiolysis and PRF in patients with unilateral chronic lumbosacral L5‐S1 neuropathic radiating pain.

Methods

Seventeen patients received two cycles of 240 seconds high‐voltage PRF and epidural adhesiolysis. Sural nerve action potential (SNAP) and the ratio of maximum H‐reflex to maximum M response (H/M ratio) as well as pain scores were collected in both lower limbs before, immediately following, and 1 month after the treatment.

Results

At follow‐up, a significant reduction in numeric rating scale (NRS) and Douleur Neuropathique 4 Questions (DN4) scores was observed in 53% of patients reporting pain improvement of ≥ 30% over baseline. The H/M ratio was decreased in the affected limb following PRF (P = 0.01) and 1 month after the treatment (P = 0.04). A direct correlation was observed between H/M ratio variation and NRS score at follow‐up in the treated limb (P = 0.04). No significant difference in sural nerve latency, amplitude, and velocity was detected between affected and normal side after treatment and at follow‐up.

Conclusions

Epidural adhesiolysis and PRF of the dorsal root ganglion seem to significantly affect spinal reflexes in patients with lumbosacral neuropathic radiating pain.
Imatinib as a potentially effective therapeutic alternative in corticosteroid‐resistant eosinophilic fasciitis
Authors: Wu Tiffany T. , Goodarzi Heidi , Wang Jennifer , Novoa Roberto , Teng Joyce M. C.
Published: September 2020

Eosinophilic fasciitis (EF) is a rare condition in children that is typically treated with systemic corticosteroids. We present the case of a 9‐year‐old boy with biopsy‐proven EF, refractory to systemic corticosteroids and methotrexate. The tyrosine kinase inhibitor imatinib was added as adjuvant therapy, leading to improvement in joint function and skin laxity. Our case is the first to suggest the anti‐fibrotic properties of imatinib may benefit EF patients.
Who Should Get a Say? Race, Law Enforcement Guidelines, and Systems of Representation
Authors: Kevins Anthony , Robison Joshua
Published: September 2020

Most citizens agree that legislators should reflect their constituencies' stances. Yet constituents rarely speak in a single voice. Instead, constituents often vary not only in their policy preferences, but also in the degree to which a given policy impacts their lives. Politicians thus at times pursue targeted representation, offering increased input to especially affected groups. As efforts to address anti‐Black police misconduct make clear, such measures can protect vulnerable minority groups—but they may also be perceived to sideline the less‐affected majority. We fielded two national survey experiments to investigate how Americans respond when legislators give more attention to some citizens than others. Results suggest that members of targeted groups react more positively on average than nonmembers and that reactions among nonmembers are strongly driven by racial resentment. The impact of racial resentment is largely unaffected by the race and partisanship of the politician proposing the measure, but it is exacerbated in cases of a clear preference conflict between the African American community and the broader constituency.
Evaluation of gonadal macroscopic and microscopic morphometry reveals precocious puberty in Bísaro pig
Authors: Paixão Gustavo , Esteves Alexandra , Carolino Nuno , dos Anjos Pires Maria , Payan‐Carreira Rita
Published: September 2020

Bísaro pig (BP), like many other local breeds reared in extensive non‐industrial systems, faces many constraints to comply with the EU welfare regulation, particularly regarding the restrictions to surgical castration. In order to adapt an immunocastration protocol to overtake this issue, a puberty timeline is needed. Using gonadal morphometry data from 91 young male BP, this study intended to characterize testicular development, describing the prominent cell types and structures, to ultimately assess the age at puberty in male BP through a mixed prediction model. As expected, the relations between several macro and microscopic parameters and their relation with age were as described within the literature. Post‐pubertal animals have larger and heavier gonads, lower Sertoli cell density/tubule, higher Leydig cell density and larger seminiferous tubules. Meiosis was firstly seen in 44‐day‐old animals, elongated spermatids in 70‐day‐old animals. Complete spermatogenesis was firstly identified in a 90‐day‐old animal. Spermatozoa were present in the epididymis of 23 animals, aged from 70 to 240 days old, and in the vas deferens of 14 animals (105 to 240 days old). The prediction model inferred that male Bísaro pigs reach puberty between 14 and 17 weeks (3 and 4 months old) and become sexually capable from 15 to 19 weeks (3.5 and 4.4 months old). These parameters confirm the sexual precocity of this breed.
Childhood physical activity as a labor market investment
Authors: Kari Jaana T. , Pehkonen Jaakko , Tammelin Tuija H. , Hutri‐Kähönen Nina , Raitakari Olli T.
Published: September 2020

This study examined the role of physical activity and changes in physical activity levels during childhood in long‐term labor market outcomes. To address this important but under‐researched theme, the study utilized data drawn from longitudinal research, the Cardiovascular Risk in Young Finns Study (YFS), and from registries compiled by Statistics Finland. The study consisted of children aged 9 (n = 1565) and 15 (n = 2445) at the time their physical activity was measured. Labor market outcomes, including employment status, average employment months, and average unemployment months, were calculated from 1997 to 2010, when the participants were aged 20 to 48 years. Regression models were used to assess the relationship between physical activity and labor market outcomes. The results show that the consequences of childhood physical activity may be far‐reaching, as higher childhood physical activity was positively related to the probability of being employed and employment months and was negatively related to unemployment months. On average, a one‐unit increase in physical activity index was related to a 1% higher probability of being employed, 0.10 more months of yearly employment, and 0.05 fewer months of yearly unemployment. The results also imply that persistently active individuals had the highest level of employment and the lowest level of unemployment compared with other activity groups. In conclusion, investments in childhood physical activity may not only promote health and well‐being but may also correlate with better labor market outcomes later in life, providing both personal and societal benefits.
Physiology of handcycling: A current sports perspective
Authors: Stephenson Ben T. , Stone Benjamin , Mason Barry S. , Goosey‐Tolfrey Victoria L.
Published: September 2020

Handcycling is a mode of mobility, and sport format within Para‐cycling, for those with a lower limb impairment. The exercise modality has been researched extensively in the rehabilitation setting. However, there is an emerging body of evidence detailing the physiological responses to handcycling in the competitive sport domain. Competitive handcyclists utilize equipment that is vastly disparate to that used for rehabilitation or recreation. Furthermore, the transferability of findings from early handcycling research to current international athletes regarding physiological profiles is severely limited. This narrative review aims to map the landscape within handcycling research and document the growing interest at the elite end of the exercise spectrum. From 58 experimental/case studies and four doctoral theses, we provide accounts of the aerobic capacity of handcyclists and the influence training status plays; present research regarding the physiological responses to handcycling performance, including tests of sprint performance; and discuss the finite information on handcyclists’ training habits and efficacy of bespoke interventions. Furthermore, given the wide variety of protocols employed and participants recruited previously, we present considerations for the interpretation of existing research and recommendations for future work, all with a focus on competitive sport. The majority of studies (n = 21) reported aerobic capacity, detailing peak rates of oxygen uptake and power output, with values >3.0 L min−1 and 240 W shown in trained, male H3‐H4 classification athletes. Knowledge, though, is lacking for other classifications and female athletes. Similarly, little research is available concerning sprint performance with only one from eight studies recruiting athletes with an impairment.
Soil organic and inorganic carbon sequestration by consecutive biochar application: Results from a decade field experiment
Authors: Shi Siwei , Zhang Qingzhong , Lou Yilai , Du Zhangliu , Wang Qian , Hu Ning , Wang Yidong , Gunina Anna , Song Jiqing
Published: September 2020

Biochar addition can expand soil organic carbon (SOC) stock and has potential ability in mitigating climate change. Also, some incubation experiments have shown that biochar can increase soil inorganic carbon (SIC) contents. However, there is no direct evidence for this from the field experiment. In order to make up the sparseness of available data resulting from the long‐term effect of biochar amendment on soil carbon fractions, here we detected the contents and stocks of the bulk SIC and SOC fractions based on a 10‐year field experiment of consecutive biochar application in Shandong Province, China. There are three biochar treatments as no‐biochar (control), and biochar application at 4.5 Mg ha−1 year−1 (B4.5) and 9.0 Mg ha−1 year−1 (B9.0), respectively. The results showed that biochar application significantly enhanced SIC content (3.2%–24.3%), >53 μm particulate organic carbon content (POC, 38.2%–166.2%) and total soil organic carbon content (15.8%–82.2%), compared with the no‐biochar control. However, <53 μm silt–clay‐associated organic carbon (SCOC) content was significantly decreased (14%–27%) under the B9.0 treatment. Our study provides the direct field evidence that SIC contributed to carbon sequestration after the biochar application, and indicates that the applied biochar was allocated mainly in POC fraction. Further, the decreased SCOC and increased microbial biomass carbon contents observed in field suggest that the biochar application might exert a positive priming effect on native soil organic carbon.
The desert as laboratory: Science, state‐making, and empire in the drylands
Authors: Koch Natalie
Published: September 2020

In December 2018, the University of Arizona was awarded a US$3.9 million contract from the Sultanate of Oman to develop research laboratories for the country’s “One Million Date Palms for Oman” initiative. This project is only the most recent example of a much longer set of collaborations between actors in the two regions, which began when Omani date palms were imported to the University of Arizona’s Agriculture Experiment Station in the 1890s. In tracing this history, I show how establishing state power in the US West was facilitated by the work of scientists and research institutions drawing on materials and knowledge from the Middle East. In the case of Arizona, the colonial project was advanced through the federally funded land‐grant programmes at the University of Arizona, which aimed to entice white settlers to the territory through promoting commercially oriented agriculture. University researchers’ efforts to secure date palm imports from abroad illustrate how the settler colonial vision treated the desert Southwest as an analogue to the Middle East, but their personal laboratory for developing modern knowledge about desert farming. The case sheds light on the role of scientific institutions in consolidating state power in desert frontiers – a process that is depoliticised by framing the desert as a laboratory as a site for “modern” science rather than a site to be colonised.
A simple drought risk analysis procedure to supplement water resources management planning in England and Wales
Authors: Turner Sean W. D. , Jeffrey Paul J.
Published: September 2020

The current ‘Deployable Output’ approach for assessing water resources system performance in England and Wales is a practical, communicable means for assessing the adequacy of a water supply system and determining the relative benefits of proposed system enhancements. A recognised flaw with this approach is that it fails to characterise the severity of potential supply shortfalls, leading to mischaracterisation of risks and benefits associated with alternative candidate investments. Here, we propose a Monte Carlo procedure that could supplement the existing process by exposing the magnitude (% water demand unserved) and duration (number of days) of supply curtailments under a range of drought scenarios. The method is demonstrated using a realistic, stylised water resources system and a discrete number of infrastructure investments. Results demonstrate that vulnerability assessments can expose previously unidentified risks that might radically alter a planner’s estimate of the cost‐effectiveness of a particular investment.
Are Self-Participation Rates Predictive of Accuracy in the U.S. Census?
Authors: P. O’Hare William
Published: September 2020

Metrics related to the U.S. Census have been widely available for several decades but there has been a dearth of studies examining the relationship among key metrics in the Census. This paper provides empirical evidence about the link between self-participation rates and census accuracy using data from the 1990, 2000, and 2010 U.S Censuses. The preponderance of the evidence shows lower self-participation rates are highly correlated with higher net undercounts and omissions rates for key socio-demographic groups and states. Nine out of 11 correlations examined in this paper are statistically significant and in the predicted direction. One key reason self-participation rates are associated with census accuracy is the fact that the population not captured in the self-participation operation goes into the households for the Nonresponse Followup (NRFU) operation. Census Bureau data show data collected in NRFU is not as accurate as that collected in self-response. The larger the share of data collected for a population that is collected in NFRU, the lower the quality of data for that group. The connection between self-participation rates and census accuracy mean the differential self-participation rates seen in the 2020 Census suggest patterns of net Census undercounts seen in the past are likely to be seen in the 2020 Census.
Historic Professions: Stabilizing the Reified Image of the Law and Other Historic Professions
Authors: Wagner Paul A. , Woods Kennard B.
Published: September 2020

Social institutions are commonly said to evolve. Yet there may be good reason why some institutions and some concepts are reified advantageously limiting any free-wheeling evolution over time. This is certainly true concepts like currency which stabilizes social ontology as much as concepts like rock stabilize natural kinds ontology. Important institutions such as the four historic professions moor civilization by being continually reified over generations aligning with sustainable public expectation. When a profession such as law is weaned from reified expectations of the public the effect is likely to be de-stabilizing of both the profession’s membership and the public the membership is meant to serve. The reified image of the bar, those entitled to the honor “esquire” following their name, assures society that a social ontology designates this group of professionals as leaders in forwarding society’s civilizing expectations. De-stabilizing this reification is not only self-destructive to the historic professions but to the societies they were intended to lead as well.
Effect of Soot-Inhibitor Additives on the Thermal Structure and Soot Volume Fraction Inside Laminar Diffusion Natural Gas Flames
Authors: Ibrahim M. M. , Attia A. , Moneib H. A. , Emara A. A.
Published: September 2020

Soot study is a fundamental issue for the combustion process of hydrocarbon fuels. Losses in combustion efficiency, health risks, environmental loosestrife, and damage in furnaces may appear as a result of soot existence. This present paper aims at providing an experimental mapping of the changes in the soot volume fraction and axial flame mean temperature associated with the addition of different percentages of soot inhibitor additives (namely, Argon, Nitrogen, and Helium) in a vertical laminar diffusion natural gas flame issuing from a honeycomb circular burner. The soot volume fraction is acquired by the laser extinction technique, while the axial variations of the mean flame temperature are accomplished by a bare 51 µm (Pt-30%Rh versus Pt-6%Rh) thermocouple to render radiation loss insignificant. The concentration of the individual additives is varied from 5% to 25% (step 5%) and the experiments are conducted at a fixed natural gas throughput (350 mL/min) to ensure unvaried thermal input. Measurement traverses along and across (at fixed radial locations) are conducted. The fuel flowrate is measured by a precision digital gas flowmeter (type: Varian intelligent), while the flow of the individual additive is admitted via solenoid valves (handled with labview program) and is injected through mixing pipes located at burner entry. The different regimes of the soot inception (molecular; zone 1), soot growth zone (zone 2), and soot oxidation (zone 3) are accurately defined and assessed in relation to the temperature results for the different cases under investigation.
Design of a Multigenerational System With Absorption Cooling for a Residential Community: A Case Study
Authors: Bolt Andre , Chea Branson , Dincer Ibrahim , Agelin-Chaab Martin , Rosen Marc
Published: September 2020

In this paper, a multigeneration system is proposed, which utilizes geothermal energy and a lithium-bromide absorption cooling cycle. The proposed system is capable of providing electricity, heating, cooling, and domestic hot water to a small residential community in Vancouver, British Columbia, Canada. The performance of the system's heating and cooling capabilities were evaluated energetically and exergetically. A case study is presented by considering human occupancy loads and the impact of building material conditions on heating and cooling. System performance was investigated using parametric studies, where the operating conditions and ambient conditions were varied. Similar systems in the open literature were found to have an energetic and exergetic coefficient of performance (COP) of 0.8 and 0.3 for heating, while the proposed multigeneration system resulted in an energetic and exergetic coefficient of performance of 1.14 and 0.63 for heating, an increase of 30–52%. Additionally, the literature revealed that some systems resulted in an energy and exergy efficiency of 26.2% and 36.6%. The proposed multigeneration system achieved an energy and exergy efficiency of 31.86% and 63.33%, an improvement of 5.66–26.73%. The study was able to utilize the existing recommendations made by British Columbia to determine the necessary heating and cooling loads while also being able to successfully generate four useful outputs with a smaller footprint than those in the literature.
Thin-Plate Imaging Inspection Using Scattered Waves Cross-Correlation Algorithm and Non-Contact Air-Coupled Transducer
Authors: Xiao Wenfeng , Yu Lingyu
Published: September 2020

This paper presents a non-contact air-coupled Lamb wave imaging technique using a two-dimensional (2D) cross-correlation method that not only detects the damage but also precisely quantifies for orientations and sizes. The air-coupled transducers (ACT) is used together with a scanning laser Doppler vibrometer (SLDV) for sensing, making a fully non-contact Lamb wave system used for this study. We first show that single-mode Lamb wave actuation can be achieved by the ACT-based on Snell's law. Detailed study and characterization of the directional ACT Lamb waves are conducted. For damage detection, a 2D cross-correlation imaging technique that uses the damage introduced scattered waves of all directions is proposed for correlating with the incident waves. The frequency-wavenumber filtering technique is used to implement the acquisition of the scatted waves and incident waves, respectively. In the end application to notches with various orientations and various sizes in terms of depth and length is given. The results show the proposed technique can precisely imaging the damages and can quantitatively evaluate the damage size in terms of length and depth.
A Robust Methodology for Assessing the Effectiveness of Site Adaptation Techniques for Calibration of Solar Radiation Data
Authors: Ramgolam Yatindra Kumar , Bangarigadu Kaviraj , Hookoom Tavish
Published: September 2020

The abundant spatial and temporal availability of solar energy has been fueling many researches and have been the reason for the proliferation of solar energy applications in the past decades. Many of these applications involve heavy investments and thus require highly accurate and reliable long-term average solar data for efficient deployment of solar energy technologies. Since ground stations are costly, site-specific, scarce and cannot provide long-term solar data, satellite-derived data is the next best alternative. However, satellite models are often unable to capture the complex local climatological variations of a given site. As such, short-term high precision solar ground measurements are used to train the satellite model so as to improve the accuracy of long-term solar estimates. There exist several site adaptation techniques to perform this task. However, to the knowledge of the researchers, no comparative study has been conducted to establish which site adaptation technique is the most effective. In this study, a robust methodology has been proposed to compare the effectiveness of four site adaptation techniques for monthly and yearly data sets using novel key performance indicators. Ground measurements from 12 stations in the tropical islands of Mauritius, Rodrigues, and Agalega were used to adapt satellite data obtained from HelioClim-3 database using different techniques. Three new nonlinear site adaptation techniques have been proposed: adjustment technique (Technique 2), compensation technique (Technique 3), and relationship technique (Technique 4). The first part of the study showed that 67–100% of the data sets were best approximated with sixth-order polynomials for the three nonlinear techniques. The second part revealed that Technique 1 (linear method) and Technique 2 were most appropriate for maximum and average data sets, respectively. The results were such that Technique 2 and Technique 1 provided best approximations for77.9–83.3% and 40.7–58.3% of average and maximum data sets, respectively. In the third part of the study, only Technique 2 provided remarkable improvements for all statistical metrics with respect to the original monthly data sets (113–118 data sets). The analysis reported 57.6–89.9%, 49.8–68.0%, 67.4–87.3%, 53.8–63.1%, 45.0–64.0%, 7.7–9.6% and 2.7–4.7% mean improvements for mean bias error (MBE), mean absolute bias error (MABE), mean percentage error (MPE), mean absolute percentage error (MAPE), root-mean-square error (RMSE), Nash–Sutcliffe (NSE), and coefficient of determination (COD), respectively, for Technique 2. Similar results were observed for yearly average data sets while the appreciation was shared among all four techniques for yearly maximum data sets, with Technique 1 having a slight advantage.
The Impact of Critical Operational Parameters on the Performance of the Aluminum Anode Baking Furnace
Authors: Tajik Abdul Raouf , Shamim Tariq , Ghoniem Ahmed F. , Abu Al-Rub Rashid K.
Published: September 2020

Minimizing energy consumption and reducing pollutant emissions during the carbon anode baking process are critically important for the aluminum industry. The present study investigates the effects of oxidizer inlet temperature, inlet oxygen concentration, equivalence ratio, refractory wall thermal conductivity, and refractory wall emissivity on the baking process using unsteady Reynolds-averaged Navier–Stokes (URANS)-based simulations in conjunction with the presumed probability density function method. Numerical results are combined with a response surface methodology (RSM) to optimize the anode baking process. The advantage of the coupled method is that it can adequately provide information on interactions of different input parameters. It is remarked that the significance level of the studied parameters varies drastically for different outputs. It is noted that diluting inlet oxygen concentration (from 23% in atmospheric air to 15%) at an elevated oxidizer temperature leads to enhanced furnace fuel efficiency, more uniform temperature distribution, and lower pollutant emissions. A linear model is detected to be adequate for response surface modeling of the anode baking furnace NOx formation. On the other hand, furnace soot formation is modeled with a higher-order model due to the quadratic behavior of the response.
Introduction to x-ray photoelectron spectroscopy
Authors: Stevie Fred A. , Donley Carrie L.
Published: September 2020

X-ray photoelectron spectroscopy (XPS) has become one of the most widely used surface analysis techniques, and XPS instrumentation has become more user friendly, making the technique available to a large number of researchers. The number of experts in the field, however, has not increased, and XPS data are often misinterpreted in the literature. This paper is intended to provide an introduction to XPS for prospective or novice users. We present the basic principles of the technique including (1) the photoelectric effect, (2) how electrons interact with matter and escape from a surface and how this determines the surface sensitivity of the technique, and (3) how the chemical environment around an element affects the binding energy of its electrons. A description of the instrumentation helps a novice user understand how data are acquired, and information is included on sample preparation and mounting. The important parameters for data acquisition are noted to help guide users starting to acquire data. Interpretation of data on both a qualitative and quantitative level is discussed, and additional sections provide information on more advanced techniques such as angle resolved XPS, small area analysis, near ambient pressure XPS, valence XPS, and ultraviolet photoelectron spectroscopy.
Mindfulness, Contact Anxiety, and Attitudes Toward Students With Visual Impairments Among Certified Adapted Physical Educators
Authors: Haegele Justin A. , Li Chunxiao , Wilson Wesley J.
Published: September 2020

The purpose of this study was to examine the relationship between interpersonal/intrapersonal mindfulness, contact anxiety, and attitudes toward students with visual impairments among certified adapted physical educators. Participants included 115 certified adapted physical educators who completed a 31-item online survey, composed of a 10-item demographic questionnaire, a 14-item mindfulness in teaching scale, a four-item intergroup anxiety scale, and a three-item attitude scale. Hierarchical multiple regression analyses revealed that intrapersonal mindfulness was a negative predictor of contact anxiety (β = −0.26, p = .007) and contact anxiety negatively predicted attitudes (β = −0.22, p = .02). A mediation analysis revealed that intrapersonal mindfulness had an indirect effect on attitudes through contact anxiety, b = 0.09, SE = 0.05, 95% confidence interval [0.006, 0.22]. Collectively, both intrapersonal and interpersonal mindfulness appear to be responsible for the formation of attitudes, but with different underlying processes involved.
In situ observation of nanolite growth in volcanic melt: A driving force for explosive eruptions
Authors: Di Genova Danilo , Brooker Richard A. , Mader Heidy M. , Drewitt James W. E. , Longo Alessandro , Deubener Joachim , Neuville Daniel R. , Fanara Sara , Shebanova Olga , Anzellini Simone , Arzilli Fabio , Bamber Emily C. , Hennet Louis , La Spina Giuseppe , Miyajima Nobuyoshi
Published: September 2020

This study shows how a few nanometer-sized crystals markedly increase the viscosity of a magma leading to explosive eruptions.
Cross-wavelength invisibility integrated with various invisibility tactics
Authors: Xu Su , Dong Fu-Yan , Guo Wen-Rui , Han Dong-Dong , Qian Chao , Gao Fei , Su Wen-Ming , Chen Hongsheng , Sun Hong-Bo
Published: September 2020

A cross-wavelength invisibility concept is proposed, inspired by a natural predator-prey relationship.
Halide perovskite nanocrystal arrays: Multiplexed synthesis and size-dependent emission
Authors: Du Jingshan S. , Shin Donghoon , Stanev Teodor K. , Musumeci Chiara , Xie Zhuang , Huang Ziyin , Lai Minliang , Sun Lin , Zhou Wenjie , Stern Nathaniel P. , Dravid Vinayak P. , Mirkin Chad A.
Published: September 2020

Arrays of site-isolated halide perovskite nanocrystals are synthesized and show size-dependent emission and photovoltaic activity.
Analysis of spatial osteochondral heterogeneity in advanced knee osteoarthritis exposes influence of joint alignment
Authors: Haberkamp Sophie , Oláh Tamás , Orth Patrick , Cucchiarini Magali , Madry Henning
Published: September 2020

Advanced human varus knee osteoarthritis correlates in a location-dependent and site-specific fashion with axial malalignment of the lower limb.
The trouble with tissue factor
Authors: Morris Gerald P.
Published: September 2020

A bleeding disorder due to genetic deficiency in tissue factor has been identified.
Prevalence of neonatal hyperbilirubinaemia and its association with glucose-6-phosphate dehydrogenase deficiency and blood-type incompatibility in sub-Saharan Africa: a systematic review and meta-analysis
Authors: Aynalem Yared Asmare , Mulu Getaneh Baye , Akalu Tadesse Yirga , Shiferaw Wondimeneh Shibabaw
Published: September 2020

Background

Hyperbilirubinaemia is a silent cause of newborn disease and death worldwide. However, studies of the disease in sub-Saharan Africa are highly variable with respect to its prevalence. Hence, this study aimed to estimate the overall magnitude of neonatal hyperbilirubinaemia and its association with glucose-6-phosphate dehydrogenase (G6PD) deficiency and blood-type incompatibility in sub-Saharan Africa.

Methods

PubMed, Scopus, Google Scholar and the Cochrane Review were systematically searched online to retrieve hyperbilirubinaemia-related articles. All observational studies reported the prevalence of hyperbilirubinaemia in sub-Saharan Africa were included for analysis and excluded if the study failed to determine the desired outcome. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed. Heterogeneity across the included studies was evaluated using the inconsistency index (I2). Subgroup and meta- regression analysis were also done. Publication bias was examined by funnel plot and the Egger’s regression test. The random-effect model was fitted to estimate the pooled prevalence of neonatal hyperbilirubinaemia. The meta-analysis was performed using the STATA V.14 software.

Results

A total of 30 486 studies were collected from the different databases and 10 articles were included for the final analysis. The overall magnitude of neonatal hyperbilirubinaemia was 28.08% (95% CI20.23 to 35.94, I2=83.2) in sub-Saharan Africa. Neonates with G6PD deficiency (OR 2.42, 95% CI 1.64 to 3.56, I2=37%) and neonates that had a blood type that was incompatible with their mother’s (OR 3.3, (95% CI 1.96 to 5.72, I2=84%) were more likely to develop hyperbilirubinaemia.

Conclusion

The failure to prevent and screen G6PD deficiency and blood-type incompatibility with their mother’s results in high burden of neonatal hyperbilirubinaemia in sub-Saharan Africa. Therefore, early identification and care strategies should be developed to the affected neonates with G6PD deficiency and blood-type incompatibility with their mother’s to address long-term medical and scholastic damages among those exposed to hyperbilirubinaemia
Taking phonership: an initiative to improve telephone access for patients receiving services at a dental hospital in the UK
Authors: Deacon Scott , Dodd Emma , Wynne-Jones David
Published: September 2020

Background

At Bristol Dental Hospital, we received almost 5000 calls per week, and we were not answering over 60% of these. This led to numerous informal complaints from frustrated patients and families to clinicians and administrative staff, reducing patient experience and affecting staff morale.

Method

We set up a Task and Finish group with clinical and managerial leadership using staff engagement and a clear message to improve our performance. We agreed metrics and feedback to administrative teams about weekly performance.

Results

Calls received fell from nearly 5000 calls per week to under 3000. Calls answered when available; we term ‘when available’ to indicate during standard operating hours when the line is not already occupied. During core hours call answering improved significantly from around 35% to over 75%. Complaints have dropped significantly in the same time period.

Reflections

Effective leadership with staff engagement has improved telephony at a dental hospital in the UK significantly. This initiative has been adopted by other areas in the Trust and helped inform good practice around the Trust.