bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization of the Epitaxial Growth of Undoped GaN Waveguides in GaN-Based Laser Diodes Evaluated by Photoluminescence
Authors: Netzel C. , Hoffmann V. , Einfeldt S. , Weyers M. 
Published: May 2020

AbstractNon-intentionally doped c-plane GaN layers are generally employed as p-side waveguide layers in violet/blue-emitting laser diodes. The recombination and diffusion of charge carriers in the p-side GaN waveguide influence the injection efficiency of holes into the InGaN quantum wells of these devices. In this study, the non-radiative recombination and the diffusivity in the [000-1] direction for charge carriers in such GaN layers are investigated by the photoluminescence of buried InGaN quantum wells, in addition to the GaN photoluminescence. The vertical charge carrier diffusion length and the diffusion constant in GaN were determined by evaluating the intensity from InGaN quantum wells in different depths below a top GaN layer. Additionally, the intensity from the buried InGaN quantum wells was found to be more sensitive to variations in the non-radiative recombination rate in the GaN layer than the intensity from the GaN itself. The study enables conclusions to be drawn on how the growth of a p-side GaN waveguide layer has to be optimized: (1) The charge carrier diffusivity in the [000-1] direction at device operation temperature is limited by phonon scattering and can be only slightly improved by material quality. (2) The use of TMGa (trimethylgallium) instead of TEGa (triethylgallium) as a precursor for the growth of GaN lowers the background silicon doping level and is advantageous for a large hole diffusion length. (3) Small growth rates below 0.5 μm/h when using TMGa or below 0.12 μm/h when using TEGa enhance non-radiative recombination. (4) A V/III gas ratio of 2200 or more is needed for low non-radiative recombination rates in GaN.
Struktur—Biomarker zur Früherkennung von Morbus Alzheimer
Authors: Stockmann Julia , Gerwert Klaus 
Published: May 2020

AbstractAlzheimer’s disease cannot be cured today. In addition to a drug, a predictive blood biomarker is urgently needed to identify high-risk subjects in early cognitively less impaired stages. Here, a biomarker is presented that uses the secondary structure distribution of Aβ-peptides in blood measured by the immuno-infrared sensor. Using this structure-based biomarker clinical conversion of symptomless subjects at baseline were predicted in a follow-up study 14 years before manifestation.
Modeling groundwater total dissolved solid from derived electromagnetic data using multiple linear regression analysis: a case study of groundwater contamination
Authors: Aduojo Ameloko Anthony , Adebowole Ayolabi Elijah , Uchegbulam Okezie 
Published: May 2020

AbstractThe high concentration of total dissolved solids (TDS) and other physicochemical parameters in groundwater around dumpsites have been used to implicate contamination from decomposed waste materials. A simple multiple linear regression (MLR) TDS model that integrates the TDS data derived from boreholes and hand-dug wells to the geophysical parameters obtained from the frequency-domain electromagnetic (EM) data was developed in this research. This is with a view to efficiently monitor groundwater resources and exploration around the Olusosun dumpsite and its communities. With the aid of the MLR equation, the observed TDS concentration of water samples collected from boreholes and hand-dug wells, and the corresponding estimated ground conductivity data in the vertical dipole mode (VD 40) and horizontal dipole modes (HD 40 and HD 20), obtained from geophysical surveys were regressed in Microsoft Excel software to generate a MLR TDS model. The integrity of the derived TDS model was appraised to examine the possibility of deploying it to investigate the TDS content of groundwater around the study area. The EM data and the resistivity models obtained around the study area confirmed contamination going on around the dumpsite. The developed TDS model can be put to use with high confidence, for groundwater TDS prediction around the study area where there are only terrain conductivity data but with no boreholes parameters. Also, terrain conductivity data alone can be applied to the model to predict the concentration of TDS in groundwater where there are no boreholes and hand-dug wells, therefore reducing the cost and time of determining and monitoring both parameters independently. With the aid of the ArcGIS software, the TDS model was used to generate TDS estimate map for the area. The knowledge of the TDS variability in such a map could give a clue about the integrity of the underground water around the site.
Re-thinking humanism as a guiding philosophy for education: a critical reflection on Ethiopian higher educat0ion institutions
Authors: Tamrat Sisay 
Published: May 2020

Abstract
This paper aims to articulate and clarify the very essence of humanism and then contextualize it to the Ethiopian context. In this case, I believe that a humanistic philosophy for education is the best approach that helps students become holistic beings – citizens who are both morally/intellectually and economically capable, autonomous, critical and responsible. Students of Ethiopian Higher Education Institutions (EHEIs), however, are characterized by a dearth of humanistic elements for education. They are marred with intellectual and moral decadence. The methodology is qualitative for it largely depends on reviewing literatures and policy documents on the issue. The upshot of this paper is that the ideals of humanism in education is not an extra – icing on the cake- it is an essential tool that would clean the academic environment from the entrenched overall moral and intellectual decay permeating EHEIs.
Preparing construction supply chains for blockchain technology: An investigation of its potential and future directions
Authors: Tezel Algan , Papadonikolaki Eleni , Yitmen Ibrahim , Hilletofth Per 
Published: May 2020

AbstractBlockchain, a peer-to-peer, controlled, distributed database structure, has the potential to profoundly affect current business transactions in the construction industry through smart contracts, cryptocurrencies, and reliable asset tracking. The construction industry is often criticized for being slow in embracing emerging technologies and not effectively diffusing them through its supply chains. Often, the extensive fragmentation, traditional procurement structures, destructive competition, lack of collaboration and transparency, low-profit margins, and human resources are shown as the main culprits for this. As blockchain technology makes its presence felt strongly in many other industries like finance and banking, this study investigates the preparation of construction supply chains for blockchain technology through an explorative analysis. Empirical data for the study were collected through semi-structured interviews with 17 subject experts. Alongside presenting a strengths, weaknesses, opportunities, and threats analysis (SWOT), the study exhibits the requirements for and steps toward a construction supply structure facilitated by blockchain technology.
Coincidence Avoidance and Formulating the Access Problem
Authors: Berry Sharon E. 
Published: May 2020

AbstractIn this article, I discuss a trivialization worry for Hartry Field’s official formulation of the access problem for mathematical realists, which was pointed out by Øystein Linnebo (and has recently been made much of by Justin Clarke-Doane). I argue that various attempted reformulations of the Benacerraf problem fail to block trivialization, but that access worriers can better defend themselves by sticking closer to Hartry Field’s initial informal characterization of the access problem in terms of (something like) general epistemic norms of coincidence avoidance.
COVID-19 pandemic: challenges and opportunities for the Greek health care system
Authors: Giannopoulou Ioanna , Tsobanoglou George O. 
Published: May 2020

AbstractAfter coming out of the state debt crisis, Greece is facing yet another crisis – that of the COVID-19 pandemic. The key challenges facing the organizational structure and function of the Greek public health system in order to meet the populations’ health needs are discussed. Social distancing, through imposed national lockdown very early in the pandemic, has been a key emergency public health measure that has saved lives. However, the system needs to enhance its capacity, through strengthening primary health and social support care, to be able to meet existing unmet health needs, the impact of the pandemic on mental health, as well as to tackle future new waves of outbreak. The related changes in health service provisions in response to the COVID-19 pandemic call for developing new models and novel approaches for delivering effective mental health services.
Formation, flow and break-up of ephemeral ice mélange at LeConte Glacier and Bay, Alaska
Authors: Amundson Jason M. , Kienholz Christian , Hager Alexander O. , Jackson Rebecca H. , Motyka Roman J. , Nash Jonathan D. , Sutherland David A. 
Published: May 2020

AbstractIce mélange has been postulated to impact glacier and fjord dynamics through a variety of mechanical and thermodynamic couplings. However, observations of these interactions are very limited. Here, we report on glaciological and oceanographic data that were collected from 2016 to 2017 at LeConte Glacier and Bay, Alaska, and serendipitously captured the formation, flow and break-up of ephemeral ice mélange. Sea ice formed overnight in mid-February. Over the subsequent week, the sea ice and icebergs were compacted by the advancing glacier terminus, after which the ice mélange flowed quasi-statically. The presence of ice mélange coincided with the lowest glacier velocities and frontal ablation rates in our record. In early April, increasing glacier runoff and the formation of a sub-ice-mélange plume began to melt and pull apart the ice mélange. The plume, outgoing tides and large calving events contributed to its break-up, which took place over a week and occurred in pulses. Unlike observations from elsewhere, the loss of ice mélange integrity did not coincide with the onset of seasonal glacier retreat. Our observations provide a challenge to ice mélange models aimed at quantifying the mechanical and thermodynamic couplings between ice mélange, glaciers and fjords.
New constraints on the last deglaciation of the Cordilleran Ice Sheet in coastal Southeast Alaska
Authors: Lesnek Alia J. , Briner Jason P. , Baichtal James F. , Lyles Alex S. 
Published: May 2020

AbstractUnderstanding marine-terminating ice sheet response to past climate transitions provides valuable long-term context for observations of modern ice sheet change. Here, we reconstruct the last deglaciation of marine-terminating Cordilleran Ice Sheet (CIS) margins in Southeast Alaska and explore potential forcings of western CIS retreat. We combine 27 new cosmogenic10Be exposure ages, 13 recently published10Be ages, and 25 new14C ages from raised marine sediments to constrain CIS recession. Retreat from the outer coast was underway by 17 ka, and the inner fjords and sounds were ice-free by 15 ka. After 15 ka, the western margin of the CIS became primarily land-terminating and alpine glaciers disappeared from the outer coast. Isolated alpine glaciers may have persisted in high inland peaks until the early Holocene. Our results suggest that the most rapid phase of CIS retreat along the Pacific coast occurred between ~17 and 15 ka. This retreat was likely driven by processes operating at the ice-ocean interface, including sea level rise and ocean warming. CIS recession after ~15 ka occurred during a time of climatic amelioration in this region, when both ocean and air temperatures increased. These data highlight the sensitivity of marine-terminating CIS regions to deglacial climate change.
Are the nutrient and textural properties of Australian commercial infant and toddler foods consistent with infant feeding advice?
Authors: Moumin Najma A. , Green Tim J. , Golley Rebecca K. , Netting Merryn J. 
Published: May 2020

AbstractInfant feeding guidelines worldwide recommend first foods to be Fe rich with no added sugars and that nutrient-poor discretionary foods are to be avoided. Feeding guidelines also recommend exposing infants to a variety of foods and flavours with increasingly complex textures. Here, we compare nutritional and textural properties of commercial infant and toddler foods available in Australia with established infant feeding guidelines. Nutrition information and ingredient lists were obtained from food labels, manufacturer and/or retailer websites. In total, 414 foods were identified, comprising mostly mixed main dishes, fruit and vegetable first foods and snacks. Most products were poor sources of Fe, and 80 % of first foods were fruit-based. Half of all products were purées in squeeze pouches, and one-third of all products were discretionary foods. The nutritional content of many products was inconsistent with guidelines, being low in Fe, sweet, smooth in consistency or classified as discretionary. Reformulation of products is warranted to improve Fe content, particularly in mixed main dishes, expand the range of vegetable-only foods and textural variety. Greater regulatory oversight may be needed to better inform parents and caregivers. Frequent consumption of commercial baby foods low in Fe may increase the risk of Fe deficiency. Excessive consumption of purées via squeeze pouches may also have implications for overweight and obesity risk.
Efficacy of internet-delivered acceptance and commitment therapy for severe health anxiety: results from a randomized, controlled trial
Authors: Hoffmann Ditte , Rask Charlotte Ulrikka , Hedman-Lagerlöf Erik , Jensen Jens Søndergaard , Frostholm Lisbeth 
Published: May 2020

AbstractBackgroundHealth anxiety is common, disabling and costly due to patients’ extensive use of health care services. Internet-delivered treatment may overcome barriers of accessibility to specialized treatment. We aimed to evaluate the efficacy of internet-delivered acceptance and commitment therapy (iACT).MethodsA randomized, controlled trial of iACT versus an internet-delivered discussion forum (iFORUM), performed in a Danish university hospital setting. Patients self-referred and underwent video-diagnostic assessment. Eligible patients (≥18 years) with health anxiety were randomized to 12 weeks of intervention. The randomization was blinded for the assessor. The primary outcome was between-group unadjusted mean differences in health anxiety symptoms measured by the Whiteley-7 Index (WI-7, range 0–100) from baseline to 6-month follow-up (6-MFU) using intention to treat and a linear mixed model. The study is registered at clinicaltrials.gov, number NCT02735434.ResultsA total of 151 patients self-referred, and 101 patients were randomized to iACT (n = 53) or iFORUM (n = 48). A mean difference in change over time of 19.0 points [95% confidence interval (CI) 10.8–27.2, p < 0.001] was shown on the WI-7, and a large standardized effect size of d = 0.80 (95% CI 0.38–1.23) at 6-MFU. The number needed to treat was 2.8 (95% CI 1.8–6.1, p < 0.001), and twice as many patients in iACT were no longer clinical cases (35% v. 16%; risk ratio 2.17, 95% CI 1.00–4.70, p = 0.050). Adverse events were few and insignificant.ConclusionsiACT for health anxiety led to sustained effects at 6-MFU. The study contributes to the development of easily accessible treatment options and deserves wider application.
Dialysis and plasmapheresis for schizophrenia: a systematic review
Authors: Cox Emily R. , Marwick Katie F. M. , Hunter Robert W. , Priller Josef , Lawrie Stephen M. 
Published: May 2020

AbstractIncreasing evidence suggests that circulating factors and immune dysfunction may contribute to the pathogenesis of schizophrenia. In particular, proinflammatory cytokines, complement and autoantibodies against CNS epitopes have recently been associated with psychosis. Related concepts in previous decades led to several clinical trials of dialysis and plasmapheresis as treatments for schizophrenia. These trials may have relevance for the current understanding of schizophrenia. We aimed to identify whether dialysis or plasmapheresis are beneficial interventions in schizophrenia. We conducted a systematic search in major electronic databases for high-quality studies (double-blinded randomised trials with sham controls) applying either haemodialysis or plasmapheresis as an intervention in patients with schizophrenia, published in English from the start of records until September 2018. We found nine studies meeting inclusion criteria, reporting on 105 patients in total who received either sham or active intervention. One out of eight studies reported a beneficial effect of haemodialysis on schizophrenia, one a detrimental effect and six no effect. The sole trial of plasmapheresis found it to be ineffective. Adverse events were reported in 23% of patients. Studies were at unclear or high risk of bias. It is unlikely that haemodialysis is a beneficial treatment in schizophrenia, although the studies were of small size and could not consider potential subgroups. Plasmapheresis was only addressed by one study and warrants further exploration as a treatment modality in schizophrenia.
Evaluating options for decision making on costly hospital drugs in Austria
Authors: Wolf Sarah , Zechmeister-Koss Ingrid , Grössmann Nicole , Wild Claudia 
Published: May 2020

ObjectivesThe aim of this study was to suggest options for a national and standardized process for the reimbursement of costly drugs provided in Austrian hospitals.MethodsFor answering the research questions, reimbursement processes of ten countries were investigated and the strengths and weaknesses of elaborated options of actions were analyzed, resulting in suggestions for solutions in the Austrian reimbursement processes for hospital drugs.ResultsBased on the information derived from the international analysis and the deliberation of the strengths and weaknesses on optional approaches, as well as, on the consideration of the existing reimbursement processes in Austria, three options to reorganize the current decentralized inpatient reimbursement process in Austria were suggested. The first option presents a process following the established processes of the decision making for outpatient drugs. The second option suggests stronger coordination of and cooperation across the existing processes of the nine regional “Pharmaceutical and Therapeutics Committees”. The third option proposes to expand the already established reimbursement process for non-drug interventions.ConclusionsEvidence-based, transparent, fair and efficient resource allocations are needed for priority setting decisions. However, a decision process can be based on the best available evidence, can be fair and transparent, although it might be substantially more time-consuming. Thus, a pragmatic balance between quality, transparency and timeliness is crucial.
Disentangling syntactic, semantic and pragmatic impairments in ASD: Elicited production of passives
Authors: AMBRIDGE Ben , BIDGOOD Amy , THOMAS Kate 
Published: May 2020

AbstractChildren with ASD and an IQ-matched control group of typically developing (TD) children completed an elicited-production task which encouraged the production of reversible passive sentences (e.g., “Bob was hit by Wendy”). Although the two groups showed similar levels of correct production, the ASD group produced a significantly greater number of “reversal” errors (e.g., “Wendy was hit by Bob”, when, in fact Wendy hit Bob) than the TD group (who, when they did not produce correct passives, instead generally produced semantically appropriate actives; e.g., “Wendy hit Bob”). These findings suggest that the more formal elements of syntax are spared relative to more semantic/pragmatic/narrative aspects (e.g., manipulating thematic roles) in at least high-functioning children with ASD.
Risk stratification of patients with hypoplastic left heart syndrome and intact atrial septum using fetal MRI and echocardiography
Authors: Serrano Ryan M. , Hussain Sabena , Brown Brandon , Ebenroth Eric S. , Farrell Anne 
Published: May 2020

AbstractDespite prenatal diagnosis, prenatal intervention, and immediate postnatal intervention, patients with hypoplastic left heart syndrome and intact or highly restrictive atrial septum have the highest risk for mortality. Charts for all infants diagnosed with hypoplastic left heart syndrome from 2009 to 2017 were retrospectively reviewed and compared, including pulmonary vein Doppler patterns on fetal echocardiogram and evidence of pulmonary lymphangiectasia on fetal MRI. Of the 81 newborns with hypoplastic left heart syndrome, we defined two groups. Group 1 patients had an adequate atrial septal communication (n = 69), while Group 2 met criteria for intact/restrictive septum (n = 12). No patient in Group 1 had a type C pulmonary vein Doppler pattern, while no patient in Group 2 had a type A pulmonary vein Doppler pattern. The two patients with pulmonary lymphangiectasia had type C pulmonary vein Doppler pattern and an intact atrial septum and did not survive. Survival to discharge for Group 1 was 83% compared to 58% for Group 2 (p = 0.116). Survival to stage 2 palliation was 71% for Group 1 compared to 50% for Group 2 (p = 0.186). Only 4 of the initial 12 patients from Group 2 are alive, which is an overall survival of 33%. Our experience supports previous evidence that fetal echocardiography can identify those patients with the greatest likelihood for postnatal intervention as well as those at highest risk for mortality. Fetal MRI is a novel imaging modality that may help providers separate patients at highest risk for mortality, regardless of pulmonary vein Doppler pattern.
High need for recovery from work and sleep problems are associated with workers’ unhealthy dietary habits
Authors: Hemiö Katri , Lindström Jaana , Peltonen Markku , Härmä Mikko , Viitasalo Katriina , Puttonen Sampsa 
Published: May 2020

Abstract

Objective:
We aimed to examine the association of recovery from work and sleep with workers’ dietary habits.

Design:
Cross-sectional study. Need for recovery (NFR) from work was assessed with a validated questionnaire. Sleep was assessed with five questions from the Nordic Sleep Questionnaire and sleep quality question. Dietary habits were estimated using a validated sixteen food groups-containing questionnaire. Ordered logistic regression was used to explore the associations of NFR and sleep with dietary habits adjusted for age, education, marital status, work schedule, working full or part time and occupation.

Setting:
Follow-up visits of type 2 diabetes prevention study cohort in a Finnish airline company

Participants:
The study included 737 men and 605 women.

Results:
Poor recovery from work was associated with a higher eating frequency (OR = 1·03, 95 % CI 1·00, 1·06), higher intake of fast food (OR = 1·05, 95 % CI 1·02, 1·08) and sweets (OR = 1·05, 95 % CI 1·02, 1·08) as well as lower intake of vegetables (OR = 0·96, 95 % CI 0·93, 0·98) and fruits (OR = 0·96, 95 % CI 0·93, 0·98) among men. In women, poor recovery from work was associated with higher fast food (OR = 1·06, 95 % CI 1·02, 1·09) and desserts consumption (OR = 1·04, 95 % CI 1·00, 1·07). Among men and women, sleep problems were associated with higher eating frequency (men: OR = 1·04, 95 % CI 1·00, 1·07, women: OR = 1·06, 95 % CI 1·02, 1·11), consumption of fast food (men: OR = 1·07, 95 % CI 1·04, 1·11, women: OR = 1·06, 95 % CI 1·02, 1·10) and sweets (men: OR = 1·05, 95 % CI 1·01, 1·08, women: OR = 1·04, 95 % CI 1·00, 1·08).

Conclusions:
Poor recovery from work and sleep problems were associated with unfavourable dietary habits especially in men.