LLukas22/scidocs huggingface dataset:
Design, Modeling, and Evaluation of a Multiband MIMO/Diversity Antenna System for Small Wireless Mobile Terminals

A new multiband diversity antenna is presented, which is suitable for multiband diversity and multiple-input multiple-output antenna systems for small wireless mobile terminals. The antenna consists of two branches of folded monopoles, at least one of which is terminated with a rectangular patch. By slightly tuning the width of the patch, the antenna can simultaneously achieve a flexible frequency ratio and a desired bandwidth. An example design is presented for most application bands, from 890 MHz through 6 GHz, which operates in a real-world cellular phone environment, including near-field interactions with other phone components and a model of a human head (the SAM phantom). The simulated and experimental results, including S-parameters, radiation patterns, signal correlations and mean effective gain, have validated the proposed antenna design as useful for compact mobile devices.
Latent homeless risk profiles of a national sample of homeless veterans and their relation to program referral and admission patterns.

OBJECTIVES
We identified risk and need profiles of homeless veterans and examined the relation between profiles and referrals and admissions to Department of Veterans Affairs (VA) homeless service programs.


METHODS
We examined data from the VA's new Homeless Operations Management and Evaluation System on 120,852 veterans from 142 sites nationally in 2011 and 2012 using latent class analyses based on 9 homeless risk factors. The final 4-class solution compared both referral and admission to VA homeless services.


RESULTS
We identified 4 latent classes: relatively few problems, dual diagnosis, poverty-substance abuse-incarceration, and disabling medical problems. Homeless veterans in the first group were more likely to be admitted to the VA's permanent supportive housing program, whereas those in the second group were more likely to be admitted to more restrictive VA residential treatment. Homeless veterans in the third group were more likely to be admitted to the VA's prisoner re-entry program, and those in the fourth group were more likely to be directed to VA medical services.


CONCLUSIONS
The heterogeneous risk and need profiles of homeless veterans supported the diversity of VA homeless services and encouraged the development of specialized services to meet their diverse needs.
Assessment and improvement of biotransfer models to cow's milk and beef used in exposure assessment tools for organic pollutants.

The aim of this study was to assess and improve the accuracy of biotransfer models for the organic pollutants (PCBs, PCDD/Fs, PBDEs, PFCAs, and pesticides) into cow's milk and beef used in human exposure assessment. Metabolic rate in cattle is known as a key parameter for this biotransfer, however few experimental data and no simulation methods are currently available. In this research, metabolic rate was estimated using existing QSAR biodegradation models of microorganisms (BioWIN) and fish (EPI-HL and IFS-HL). This simulated metabolic rate was then incorporated into the mechanistic cattle biotransfer models (RAIDAR, ACC-HUMAN, OMEGA, and CKow). The goodness of fit tests showed that RAIDAR, ACC-HUMAN, OMEGA model performances were significantly improved using either of the QSARs when comparing the new model outputs to observed data. The CKow model is the only one that separates the processes in the gut and liver. This model showed the lowest residual error of all the models tested when the BioWIN model was used to represent the ruminant metabolic process in the gut and the two fish QSARs were used to represent the metabolic process in the liver. Our testing included EUSES and CalTOX which are KOW-regression models that are widely used in regulatory assessment. New regressions based on the simulated rate of the two metabolic processes are also proposed as an alternative to KOW-regression models for a screening risk assessment. The modified CKow model is more physiologically realistic, but has equivalent usability to existing KOW-regression models for estimating cattle biotransfer of organic pollutants.
Bivalirudin Is Associated With Improved In-Hospital Outcomes Compared With Heparin in Percutaneous Vascular Interventions: Observational, Propensity-Matched Analysis From the Premier Hospital Database.

BACKGROUND
Peripheral vascular interventions are increasingly preferred for the treatment of patients with symptomatic peripheral arterial disease because they are associated with similar clinical outcomes and lower morbidity than open surgical procedures. The objective of this study was to assess the comparative effectiveness of procedural anticoagulation with bivalirudin compared with unfractionated heparin in patients undergoing peripheral vascular interventions.


METHODS AND RESULTS
This was a retrospective, observational study using the Premier Hospital administrative database. We examined 23,934 consecutive patients undergoing lower extremity peripheral vascular interventions between January 2008 and December 2012 who were treated with either bivalirudin or unfractionated heparin. In-hospital end points included death, myocardial infarction, transfusion, stroke, amputation, and the composite end points of major adverse cardiovascular events, and net adverse clinical events. Propensity score matching was performed to control for baseline imbalances and yielded 3649 matched pairs. After propensity score matching, patients treated with bivalirudin had lower in-hospital event rates with significantly lower mortality (odds ratio, 0.40; P=0.017), need for blood product transfusion (odds ratio, 0.74; P=0.009), major adverse cardiovascular events (odds ratio, 0.64; P=0.003), and net adverse clinical events (odds ratio, 0.72; P<0.001). These associations were observed consistently across clinically relevant subgroups.


CONCLUSIONS
In patients undergoing peripheral vascular interventions, procedural anticoagulation with bivalirudin may result in more favorable in-hospital outcomes compared with unfractionated heparin, the current standard of care. These observations will require prospective confirmation in a randomized, controlled trial.
Dermoscopy of pigmented lesions of the vulva: a retrospective morphological study.

BACKGROUND
The dermoscopic patterns of pigmented skin tumors are influenced by the body site.


OBJECTIVE
To evaluate the clinical and dermoscopic features associated with pigmented vulvar lesions.


METHODS
Retrospective analysis of clinical and dermoscopic images of vulvar lesions. The χ² test was used to test the association between clinical data and histopathological diagnosis.


RESULTS
A total of 42 (32.8%) melanocytic and 86 (67.2%) nonmelanocytic vulvar lesions were analyzed. Nevi significantly prevailed in younger women compared with melanomas and melanosis and exhibited most commonly a globular/cobblestone (51.3%) and a mixed (21.6%) pattern. Dermoscopically all melanomas showed a multicomponent pattern. Melanotic macules showed clinical overlapping features with melanoma, but their dermoscopic patterns differed significantly from those observed in melanomas.


CONCLUSION
The diagnosis and management of pigmented vulvar lesions should be based on a good clinicodermoscopic correlation. Dermoscopy may be helpful in the differentiation of solitary melanotic macules from early melanoma.
Which Types of Environmental Management Systems Are Related to Greater Environmental Improvements

While there is little empirical evidence regarding which types of environmental management systems (EMSs) are associated with greater environmental improvements, governments worldwide are encouraging facilities to adopt them. This research compares the environmental performance of facilities that adopt ISO 14001-certified EMSs, complete (uncertified) EMSs, and incomplete EMSs, across multiple environmental media. We analyze these relationships for manufacturing facilities in seven countries using a two-stage model to control for selection bias. Our findings indicate that the adoption of all types of EMSs is related to improved environmental performance in an international setting. However, ISO 14001-certified EMSs are associated with environmental improvements to a broader array of environmental media. These findings offer important implications about which types of EMSs have greater promise as voluntary environmental governance tools.
Early Critical Care Course in Children after Liver Transplant

Objective. To review the critical care course of children receiving orthotopic liver transplantation (OLT). Methods. A retrospective chart review of patients admitted to the pediatric critical care following OLT performed in our center between 1988 and 2011. Results. A total of 149 transplants in 145 patients with a median age of 2.7 (IQR 0.9-7) years were analyzed. Mortality in the first 28 days was 8%. The median length of stay (LOS) was 7 (4.0-12.0) days. The median length of mechanical ventilation (MV) was 3 (1.0-6.2) days. Open abdomen, age, and oxygenation index on the 2nd day predicted LOS. Open abdomen, age, amount of blood transfused during surgery, and PRISM III predicted length of MV. 28% of patients had infection and 24% developed acute rejection. In recent group (2000-2011) OLT was performed in younger patients; the risk of infection and acute rejection was reduced and patients required longer LOS and MV compared with old group (1988-1999). Conclusion. The postoperative course of children after OLT is associated with multiple complications. In recent years OLT was performed in younger children; living donors were more common; the rate of postoperative infection and suspected rejection was reduced significantly; however patients required longer MV and LOS in the PCCU.
Diagnostic Performance of Resting and Hyperemic Invasive Physiological Indices to Define Myocardial Ischemia: Validation With 13N-Ammonia Positron Emission Tomography.

OBJECTIVES
The authors sought to compare the diagnostic performance of fractional flow reserve (FFR), instantaneous wave-free ratio (iFR), and resting distal coronary artery pressure/aortic pressure (Pd/Pa) using 13N-ammonia positron emission tomography (PET).


BACKGROUND
The diagnostic performance of invasive physiological indices was reported to be different according to the reference to define the presence of myocardial ischemia.


METHODS
A total of 115 consecutive patients with left anterior descending artery stenosis who underwent both 13N-ammonia PET and invasive physiological measurement were included. Optimal cutoff values and diagnostic performance of FFR, iFR, and resting Pd/Pa were assessed using PET-derived coronary flow reserve (CFR) and relative flow reserve (RFR) as references. To compare discrimination and reclassification ability, each index was compared with integrated discrimination improvement (IDI) and category-free net reclassification index (NRI).


RESULTS
All invasive physiological indices correlated with CFR and RFR (all p values <0.001). The overall diagnostic accuracies of FFR, iFR, and resting Pd/Pa were not different for CFR <2.0 (FFR 69.6%, iFR 73.9%, and resting Pd/Pa 70.4%) and RFR <0.75 (FFR 73.9%, iFR 71.3%, and resting Pd/Pa 74.8%). Discrimination and reclassification abilities of invasive physiological indices were comparable for CFR. For RFR, FFR showed better discrimination and reclassification ability than resting indices (IDI = 0.170 and category-free NRI = 0.971 for iFR; IDI = 0.183 and category-free NRI = 1.058 for resting Pd/Pa; all p values <0.001).


CONCLUSIONS
The diagnostic performance of invasive physiological indices showed no differences in the prediction of myocardial ischemia defined by CFR. Using RFR as a reference, FFR showed a better discrimination and reclassification ability than resting indices.
A Survey of Maneuvering Target Tracking — Part III : Measurement Models

This is the third part of a series of papers that provide a comprehensive survey of the techniques for tracking maneuvering targets without addressing the so-called measurement-origin uncertainty. Part I [1] and Part II [2] deal with general target motion models and ballistic target motion models, respectively. This part surveys measurement models, including measurement model-based techniques, used in target tracking. Models in Cartesian, sensor measurement, their mixed, and other coordinates are covered. The stress is on more recent advances — topics that have received more attention recently are discussed in greater details.
Physical and sexual intimate partner violence and reported serious psychological distress in the 2007 BRFSS

We sought to determine the relationship between intimate partner violence (IPV) and serious psychological distress (SPD) as measured by the Kessler-6 (K6) among U.S. adults. We used data from the 2007 Behavioral Risk Factor Surveillance System (BRFSS) to determine whether individuals who reported multiple forms of IPV also reported higher prevalences of SPD compared with those who reported: 1) no physical or sexual IPV; 2) physical or sexual IPV only; and 3) threatened or attempted physical IPV. We also obtained adjusted prevalences for lifetime physical or sexual IPV. We analyzed responses from three states that administered both the IPV and the K6 optional modules of the BRFSS in 2007. Respondents (5,985 men; 9,335 women) were categorized as experiencing threatened or attempted physical violence, physical violence, sexual violence, or both physical and sexual violence. We calculated lifetime IPV prevalence by demographic characteristics and performed adjusted and unadjusted logistic regressions of the relationship between level of IPV and SPD. 15.5 % of the sample reported some form of IPV. The prevalence of any IPV was almost twice as high in women (19.9 %) as in men (10.9 %). IPV was also associated with age, marital status, employment status, and income. Overall, the estimated prevalence of SPD was 2.9 % (95 % CI: 2.5–3.5). Among women, it was 2.1 % (95 % CI: 1.16–2.8) among those with no lifetime IPV and 15.4 % (95 % CI: 10.9–21.3) among those who reported both physical and sexual IPV. IPV is a serious public health problem associated with multiple adverse health outcomes, including SPD. In our study, the odds of SPD increased when respondents experience multiple forms of IPV. Medical and mental health practitioners should consider assessing exposure to IPV when patients have signs or symptoms of SPD or other conditions that might be consistent with IPV. Similarly, practitioners should consider assessing for IPV among patients with SPD. States should consider obtaining population-based IPV prevalence via the BRFSS to better plan for the health needs of their residents.
1-MCP reduces physiological storage disorders of 'Hass' avocados

Physiological disorders occur when ‘Hass’ avocados are stored for more than approximately 4–6 weeks. The major disorder is diffuse flesh discolouration (“flesh greying”, or “internal chilling injury”), but others include vascular browning, vascular leaching (browning of flesh around the vascular bundles), stringy vascular tissue (thickening and separation of the vascular strands), and outer flesh blackening (blackening of the outmost layer of the mesocarp). We have examined 1-MCP effects on ‘Hass’ avocados stored for 4 or 7 weeks at 5.5 ◦C following treatment with 50–1000 nl l −1 1-MCP for 6–24 h, at 6 or 15 ◦C. The effect of harvest date (fruit maturity) on responsiveness to 100 and 500 nl l −11-MCP was examined. 1-MCP treated fruit were firmer following storage, had reduced skin colouration (purpling) at removal from storage (4 or 7 weeks), increased time to softening, and reduced physiological disorders associated with long-term storage. Relatively little difference was observed between fruit treated at 15 and 6 ◦C, and thus a treatment temperature of 6 ◦C was used in the remaining experiments. For lower 1 and 24 h p but had l arly if t a e tool f ©
Construction programme management theory and practice: Contextual and pragmatic approach

The combination of the economic pressures, maturity and limitations of project management and the dynamic nature of the construction industry clients’ requirements has triggered the need for the adoption and implementation of programme management as a de facto means of aligning, coordinating and managing a portfolio of construction projects to deliver benefits that would not be achievable if the projects were managed independently. Despite the benefits achievable in the practice of programme management, the awareness and understanding of its practice in the construction industry remains vague as a result of a lack of clarity and inconsistencies associated with its definitions. To fully understand the core essence of programme management, it is imperative that its quintessential definition, practice and context are clearly understood and documented. This research is based on a pragmatic synthesis of literature review and industrial questionnaire survey which establishes the relationship, similarities and differences between programme management and project management and subsequently draws comparisons of the practices relevant to programmes between programme and non-programme organisations. The research further highlights the implications of unawareness and lack of understanding that can affect the effective implementation and practice of programme management in the UK construction environment. 2009 Elsevier Ltd and IPMA. All rights reserved.
Forced vibration analysis of flexible Euler-Bernoulli beams with geometrical discontinuities

This paper presents a novel framework for forced motion analysis of Euler-Bernoulli beam with multiple jumped discontinuities in the cross section. In this regard, the entire length of beam is partitioned into uniform segments between any two successive discontinuity points. Beam characteristics matrix can be derived based on the boundary conditions and the continuity conditions applied at the partitioned points. This matrix is particularly used to find beam natural frequencies and mode shapes. The governing ODE of motion and its state-space representation are then derived for the beam under a distributed dynamic loading condition. To clarify the implementation of the proposed method, a beam with two stepped discontinuities in the cross section is studied, and numerical simulations are provided to demonstrate the mode shapes and frequency response of beam for different stepped values. Results indicate that the added mass and stiffness significantly affects the mode shapes and natural frequencies.
Effect of high-dose allopurinol on exercise in patients with chronic stable angina: a randomised, placebo controlled crossover trial

BACKGROUND
Experimental evidence suggests that xanthine oxidase inhibitors can reduce myocardial oxygen consumption for a particular stroke volume. If such an effect also occurs in man, this class of inhibitors could become a new treatment for ischaemia in patients with angina pectoris. We ascertained whether high-dose allopurinol prolongs exercise capability in patients with chronic stable angina.


METHODS
65 patients (aged 18-85 years) with angiographically documented coronary artery disease, a positive exercise tolerance test, and stable chronic angina pectoris (for at least 2 months) were recruited into a double-blind, randomised, placebo-controlled, crossover study in a hospital and two infirmaries in the UK. We used computer-generated randomisation to assign patients to allopurinol (600 mg per day) or placebo for 6 weeks before crossover. Our primary endpoint was the time to ST depression, and the secondary endpoints were total exercise time and time to chest pain. We did a completed case analysis. This study is registered as an International Standard Randomised Controlled Trial, number ISRCTN 82040078.


FINDINGS
In the first treatment period, 31 patients were allocated to allopurinol and 28 were analysed, and 34 were allocated to placebo and 32 were analysed. In the second period, all 60 patients were analysed. Allopurinol increased the median time to ST depression to 298 s (IQR 211-408) from a baseline of 232 s (182-380), and placebo increased it to 249 s (200-375; p=0.0002). The point estimate (absolute difference between allopurinol and placebo) was 43 s (95% CI 31-58). Allopurinol increased median total exercise time to 393 s (IQR 280-519) from a baseline of 301 s (251-447), and placebo increased it to 307 s (232-430; p=0.0003); the point estimate was 58 s (95% CI 45-77). Allopurinol increased the time to chest pain from a baseline of 234 s (IQR 189-382) to 304 s (222-421), and placebo increased it to 272 s (200-380; p=0.001); the point estimate was 38 s (95% CI 17-55). No adverse effects of treatment were reported.


INTERPRETATION
Allopurinol seems to be a useful, inexpensive, well tolerated, and safe anti-ischaemic drug for patients with angina.


FUNDING
British Heart Foundation.
Marginal bone loss with mandibular two-implant overdentures using different loading protocols and attachment systems: 10-year outcomes.

PURPOSE
The aim of this study was to evaluate long-term marginal bone levels for two unsplinted implants supporting mandibular overdentures using conventional and early loading protocols with different implant surfaces and attachment systems.


MATERIALS AND METHODS
A cohort of 106 edentulous participants (mean age: 65 years) was treated with mandibular two-implant overdentures opposing complete maxillary dentures. Participants were randomly allocated into three loading protocol groups using four implant systems; single-stage surgery was performed for all participants, followed by an unsplinted prosthesis using six different attachment systems. Standardized intraoral radiographs taken at baseline (loading) and over 10 years appraised marginal bone levels mesially and distally from reference points under magnification. Three calibrated examiners repeated measurements, diminishing intra- and interobserver variability. Progressive attrition of participants occurred as a result of deaths, dropouts, and emigration. Seventy-nine participants (74.5%, mean age: 72 years) were available at the 10-year recall. Differences in bone loss among different loading protocols, implant surfaces, and attachment systems were tested using chi-square and one-way analysis of variance tests.


RESULTS
Minimal, time-dependent, long-term marginal bone loss occurred with all loading protocols. Annual marginal bone loss progressed at low levels after the first year with episodes of bone loss and gain. There was stability in marginal bone levels over the long term, with the majority of remodeling occurring during the first year of function. Roughened implant surfaces may be beneficial during the early remodeling period. The amount of marginal bone loss in the first year of loading differed significantly by loading protocol and implant surface, whereas attachment system had a minor influence. Differences were not reflected in the success rates calculated using standard criteria. The remaining participants at 10 years were classified as successful related to the criterion of marginal bone loss, irrespective of the determining criteria for success.


CONCLUSIONS
Either a 2- , 6-, or 12-week loading protocol for mandibular two-implant overdentures is possible in the long term, irrespective of the attachment system used. Minimal marginal bone loss may be attributed primarily to mandibular basal bone remaining from long-term edentulism. Revision of the current implant success criteria to offer a stricter limit is desirable.