LLukas22/scidocs huggingface dataset:
High gain broadband monopole antenna for wireless communications

In this paper, a wideband monopole antenna with high gain characteristics has been proposed. Number of slits was introduced at the far radiating edge to transform it to multiple monopole radiators. Partial ground plane has been used to widen the bandwidth while by inserting suitable slits at the radiating edges return loss and bandwidth has been improved. The proposed antenna provides high gain up to 13.2dB and the achieved impedance bandwidth is wider than an earlier reported design. FR4 Epoxy with dielectric constant 4.4 and loss tangent 0.02 has been used as substrate material. Antenna has been simulated using HFSS (High Frequency Structure Simulator) as a 3D electromagnetic field simulator, based on finite element method. A good settlement has been found between simulated and measured results. The proposed design is suitable for GSM (890-960MHz), GPS (L1:1575.42MHz, L2:1227.60MHz, L3:1381.05MHz, L4:1379.913MHz, L5:1176.45MHz), DCS (1710-1880MHz), PCS (1850-1990MHz), UMTS(1920-2170MHz), Wi-Fi/WLAN/Hiper LAN/IEEE 802.11 2.4GHz (2412-2484MHz), 3.6GHz (3657.5-3690.0MHz) and 4.9/5.0GHz (4915-5825MHz), Bluetooth (2400-2484MHz), WiMAX 2.3GHz (2.3-2.5GHz), 2.5GHz (2500-2690 MHz), 3.3GHz, 3.5GHz (3400-3600MHz) and 5.8GHz (5.6-5.9GHz) & LTE applications.
International telemedicine in pediatric cardiac critical care: a multicenter experience.

OBJECTIVE
To describe our multicenter experience in telemedicine-assisted pediatric cardiac critical care (PCCC) with four hospitals in Latin America from July 2011 to June 2013.


MATERIALS AND METHODS
This was a descriptive study based on telemedicine encounters related to quality of communication, assessed information, activities, and recommendations. Comparison among centers was performed. A postimplementation survey was conducted through a 5-point Likert scale questionnaire investigating acceptance among professionals involved with the telemedicine service through the assessment of general satisfaction, perception about the work system, usefulness, and impact on medical practice.


RESULTS
One thousand forty consultations were conducted for 476 patients. Postoperatively, patients were distributed into Risk Adjustment Classification for Congenital Heart Surgery (RACHS-1) categories as follows: 2%, 26%, 36%, 26%, and 10% in categories 1, 2, 3, 4, and 6, respectively. A real-time intervention took place in 23% of encounters. Of the 2,173 recommendations given, 70 were related to extracorporeal membrane oxygenation management. There was a different RACHS-1 distribution and encounter characteristics among centers. From a total of 51 surveys sent, 27 responses were received, and among responders, overall satisfaction was very high (4.27 ± 0.18), as well as work system quality (4.4 ± 0.37). Telemedicine was considered useful in the cardiac intensive care unit (3.86 ± 0.60), for patient outcomes (3.8 ± 0.51), and for education (3.7 ± 0.71). There was a difference in overall satisfaction, perception about telemedicine usefulness in education, and impact on medical practice among centers.


CONCLUSIONS
An international, multicenter telemedicine program in PCCC is technologically and logistically feasible. Prospective interventions in our international multicenter telemedicine program should consider differences in staff composition, perception of needs, and patient population among centers.
THE CORE SELF-EVALUATIONS SCALE: DEVELOPMENT OF A MEASURE

Despite an emerging body of research on a personality trait termed core self-evaluations, the trait continues to be measured indirectly. The present study reported the results of a series of studies that developed and tested the validity of the Core Self-Evaluations Scale (CSES), a direct and relatively brief measure of the trait. Results indicated that the 12-item CSES was reliable, displayed a unitary factor structure, correlated significantly with job satisfaction, job performance, and life satisfaction, and had validity equal to that of an optimal weighting of the four specific core traits (self-esteem, generalized self-efficacy, neuroticism, and locus of control), and incremental validity over the five-factor model. Overall, results suggest that the CSES is a valid measure that should prove useful in applied psychology research.
Circadian regulation of leaf hydraulic conductance in sunflower (Helianthus annuus L. cv Margot)

The circadian regulation of leaf hydraulic conductance ( K leaf ) was investigated in Helianthus annuus L. (sunflower). K leaf was measured with an high pressure flow meter during the light and dark period from plants growing at a photoperiod of 12 h. K leaf was 4.0 e4 kg s 1 m 2 MPa 1 during the light period (LL) and 30–40% less during the dark period (DL). When photoperiod was inverted and leaves were measured for K leaf at their subjective light or dark periods, K leaf adjusted to the new conditions requiring 48 h for increasing from dark to light values and 4 d for the opposite transition. Plants put in continuous dark showed K leaf oscillating from light to dark values in phase with their subjective photoperiod indicating that K leaf changes were induced by the circadian clock. Several cuts through the minor veins reduced leaf hydraulic resistance ( R leaf ) of both LL and DL to the same value (1.0 e + 3 MPa m 2 s kg 1 ) that equalled the vascular resistance ( R v ). The contribution of the non-vascular leaf resistance ( R nv ) to R leaf was of 71.9% in DL and of 58.4% in LL. The dominant R nv was shown to be reversibly modulated by mercurials, suggesting that aquaporins play a role in diurnal changes of K leaf . Key-words : aquaporins; circadian clock; hydraulic conductance; leaf; light; mercury chloride; sunflower.
Neuropathies : Essential oils show promising results in the fight against symptoms

Chronic pain is a widespread problem affecting more than one and a half billion people worldwide. Of those, 116 million people suffering from chronic pain reside in the United States of America and four million of those with chronic pain suffer from neuropathic pain. Neuropathic pain is a very complex and hard to manage pain requiring several approaches to medication and treatment. In this paper, the use of essential oils of Mentha x piperita (Peppermint), Pelargonium x asperum (Geranium Rose), Piper nigrum (Black Pepper) and Rosmarinus officinalis ct. cineole (Rosemary ct. cineole) to increase circulation and decrease pain in patients with peripheral neuropathy of the lower extremities is discussed through two case studies, chemical analysis, current research and future considerations. NEUROPATHIES: ESSENTIAL OILS SHOW PROMISING RESULTS 3 Neuropathies: Essential oils show promising results in the fight against symptoms. Chronic pain, or pain lasting longer than six months, affects approximately 1.5 billion people worldwide with 116 million of those people residing in the United States of America (American Academy of Pain Medicine [AAPM], 2011). Pain is divided into two categories: nociceptive pain, which includes visceral and somatic pain, and neuropathic pain. In hospice and palliative care settings, bone and cancer pain are also frequently used categories. Of those 116 million people suffering from chronic pain, approximately four million people in the United States of America are currently suffering from neuropathic pain (Dickson, Head, Gitlow, & Osbahr, 2010, p. 1637). (Bennett, 1998, p. 104) Neuropathic pain is defined as a pain caused by a lesion or disease of the somatosensory nervous system and can be further divided into central and peripheral neuropathic pain (International Association for the Study of Pain [IASP], 2011). The causes, symptoms, diagnosing, current treatment and ongoing research of neuropathic pain will be discussed in this paper. Two case studies will also be reviewed along with analysis of essential oils used for symptom management and possible future considerations for applied aromatherapy research.
Naive (Bayes) at Forty: The Independence Assumption in Information Retrieval

The naive Bayes classiier, currently experiencing a renaissance in machine learning, has long been a core technique in information retrieval. We review some of the variations of naive Bayes models used for text retrieval and classiication, focusing on the distributional assumptions made about word occurrences in documents.
Effect of potassium-enriched salt on cardiovascular mortality and medical expenses of elderly men.

BACKGROUND
The beneficial effects of potassium-enriched salt on blood pressure have been reported in a few short-term trials. The long-term effects of potassium-enriched salt on cardiovascular mortality have not been carefully studied.


OBJECTIVE
The objective was to examine the effects of potassium-enriched salt on cardiovascular disease (CVD) mortality and medical expenditures in elderly veterans.


DESIGN
Five kitchens of a veteran retirement home were randomized into 2 groups (experimental or control) and veterans assigned to those kitchens were given either potassium-enriched salt (experimental group) or regular salt (control group) for approximately 31 mo. Information on death, health insurance claims, and dates that veterans moved in or out of the home was gathered.


RESULTS
Altogether, 1981 veterans, 768 in the experimental [x (+/-SD) age: 74.8 +/- 7.1 y] and 1213 in the control (age: 74.9 +/- 6.7 y) groups, were included in the analysis. The experimental group had better CVD survivorship than did the control group. The incidence of CVD-related deaths was 13.1 per 1000 persons (27 deaths in 2057 person-years) and 20.5 per 1000 (66 deaths in 3218 person-years) for the experimental and control groups, respectively. A significant reduction in CVD mortality (age-adjusted hazard ratio: 0.59; 95% CI: 0.37, 0.95) was observed in the experimental group. Persons in the experimental group lived 0.3-0.90 y longer and spent significantly less (approximately US Dollars 426/y) in inpatient care for CVD than did the control group, after control for age and previous hospitalization expenditures.


CONCLUSIONS
This study showed a long-term beneficial effect on CVD mortality and medical expenditure associated with a switch from regular salt to potassium-enriched salt in a group of elderly veterans. The effect was likely due to a major increase in potassium and a moderate reduction in sodium intakes.
Minding and mending the gap: Social psychological interventions to reduce educational disparities.

BACKGROUND
Achievement gaps continue to garner a great deal of attention both in academic and in popular circles. Many students continue to struggle despite broad educational reforms aimed at narrowing these gaps in learning and performance.


AIMS
In this article, we review a number of social psychological interventions that show promise in reducing gaps in achievement, not by addressing structural barriers to achievement, but by helping students cope with threats to their identity that impair intellectual functioning and motivation. For example, interventions involving meditation, role models, emotional reappraisal, growth mindsets, imagining possible selves, self-affirmations, belongingness and cooperative learning have been shown to ameliorate threats to identity and raise achievement. We describe and evaluate these social psychological interventions.


ARGUMENTS
Many achievement gaps involve a psychological predicament: a threat to one's social identity or to one's sense of belonging. Students' implicit theories - how they mind the gap - can act as barriers to their success. By helping students cope with these threats, these theory-based interventions represent a genuine advance in the way schools may reduce gaps in achievement.


CONCLUSION
These interventions show how students' educational success depends partly on fluid aspects of context - how tasks are framed, who else is in the room, or what they believe about intelligence. Because of this fluidity, these interventions may not work in all settings. Achievement gaps are ultimately caused by a variety of factors, both objective and subjective that produce inequality. The research reviewed here suggests that even without changes in objective barriers to success, brief psychological interventions can narrow what many see as intractable gaps in academic achievement.
Post-stroke fatigue: a problem of altered corticomotor control?

OBJECTIVES
We recently showed that diminished motor cortical excitability is associated with high levels of post-stroke fatigue. Motor cortex excitability impacts movement parameters such as reaction and movement times. We predicted that one or both would be influenced by the presence of post-stroke fatigue.


METHODS
41 first-time stroke survivors (high fatigue n=21, Fatigue Severity Scale 7 (FSS-7) score >5; low fatigue n=20, FSS-7 score <3) participated in the study. Movement times, choice and simple reaction times were measured in all participants.


RESULTS
A three way ANOVA with fatigue (high and low), task (movement time, simple reaction time and choice reaction time) and hand (affected and unaffected) as the three factors, revealed a significant difference between affected (but not unaffected) hand movement times in the high compared to low fatigue groups. Reaction times, however, were not different between the high-fatigue and low-fatigue groups in either the affected or unaffected hand.


CONCLUSIONS
Previously, we showed that motor cortex excitability is lower in patients with high post-stroke fatigue. Our current findings suggest that post-stroke fatigue (1) is a problem of movement speed (possibly a consequence of diminished motor cortex excitability) and not movement preparation, and (2) may have a focal origin confined to the lesioned hemisphere. We suggest that low motor cortex excitability in the lesioned hemisphere is a viable therapeutic target in post-stroke fatigue.
Kinetics of the reaction of pure CO2 with N‐methyldiethanolamine in aqueous solutions

The process of pure carbon dioxide absorption is analyzed in aqueous solutions of N-methyldiethanolamine (MDEA). The experiments were made in a stirred tank reactor with a plane and known interface area. The variables considered were the MDEA concentration within the range 0.1–3.0 M and the temperature in the interval 288–313 K. From the results, we deduce that the process takes place under isothermal conditions and moderately fast regime, with second-order kinetics. We determined a reaction order of one with respect to the amine, and an expression for the kinetic constant valid throughout the entire range of temperatures and concentrations assayed ln k = 22.4 − 6243.5/T . C © 2008 Wiley Periodicals, Inc. Int J Chem Kinet 41: 204–214, 2009
Nanopower OTAs With Improved Linearity and Low Input Offset Using Bulk Degeneration

In this paper, a study of bulk degeneration in a differential pair to enhance its linear range is initially conducted. A nanopower operational transconductance amplifier (OTA) is then proposed combining both source and bulk degeneration to achieve an increased linear range above 1 V with a power supply ranging from 1.9 V to 5.5 V. The circuit was fabricated in a 0.6 μm technology and measured. This linearity improvement is achieved with a negligible increase in power consumption, noise, and input referred offset. Finally a circuit implementing the full signal conditioning of a piezoelectric accelerometer for adaptive pacemakers is presented, as an application example of the proposed OTA. The circuit consumes only 500 nA, and it can discriminate signals of 15 μV, because of the low input referred offset <; 5 mV of the source-bulk linearized OTA.
Medium access control with mobility-adaptive mechanisms for wireless sensor networks

Mobility in wireless sensor networks poses unique challenges to the Medium Access Control (MAC) protocol design. Previous MAC protocols for sensor networks assume static sensor nodes and focus on energy-efficiency. In this paper, we present MMAC, a mobility-adaptive, collision-free MAC protocol for mobile sensor networks. MMAC caters for both weak mobility (e.g. topology changes, node joins and node failures) and strong mobility (e.g. concurrent node joins and failures, and physical mobility of nodes). When using MMAC, nodes are allowed to transmit at particular time-slots, based on the traffic information and mobility pattern of the nodes. Allowing transmission at particular time-slots makes MMAC a schedulingbased protocol, thereby guaranteeing collision avoidance. Simulation results indicate that the performance of MMAC is equivalent to that of TRAMA in static sensor network environments. In sensor networks with mobile nodes or high network dynamics, MMAC outperforms existing MAC protocols, including TRAMA and S-MAC, in terms of energy-efficiency, delay and packet delivery.
4-year results of a randomized controlled trial of percutaneous repair versus surgery for mitral regurgitation.

OBJECTIVES
This study sought to evaluate 4-year outcomes of percutaneous repair versus surgery for mitral regurgitation.


BACKGROUND
Transcatheter therapies are being developed to treat valvular heart disease. In the EVEREST (Endovascular Valve Edge-to-Edge Repair Study) II trial, treatment of mitral valve regurgitation (MR) with a novel percutaneous device was compared with surgery and showed superior safety, but less reduction in MR at 1 year overall. We report the 4-year outcomes from the EVEREST II trial.


METHODS
Patients with grade 3+ or 4+ MR were randomly assigned to percutaneous repair with the MitraClip (Abbott, Menlo Park, California) device or conventional mitral valve surgery in a 2:1 ratio (184:95). Patients prospectively consented to 5 years of follow-up.


RESULTS
At 4 years, the rate of the composite endpoint of freedom from death, surgery, or 3+ or 4+ MR in the intention-to-treat population was 39.8% versus 53.4% in the percutaneous repair group and surgical groups, respectively (p = 0.070). Rates of death were 17.4% versus 17.8% (p = 0.914), and 3+ or 4+ MR was present in 21.7% versus 24.7% (p = 0.745) at 4 years of follow-up, respectively. Surgery for mitral valve dysfunction, however, occurred in 20.4% versus 2.2% (p < 0.001) at 1 year and 24.8% versus 5.5% (p < 0.001) at 4 years.


CONCLUSIONS
Patients treated with percutaneous repair of the mitral valve more commonly required surgery to treat residual MR; however, after the first year of follow-up, there were few surgeries required after either percutaneous or surgical treatment and no difference in the prevalence of moderate-severe and severe MR or mortality at 4 years. (Endovascular Valve Edge-to-Edge Repair Study [EVEREST II]; NCT00209274).
Teaching and Learning Vocabulary : Bringing Research to Practice

Teaching and Learning Vocabulary: Bringing Research to Practice edited by Hiebert and Kamil is a collection of twelve chapters dealing with vocabulary instruction for a variety of student populations such as young children, English language learners, and young adolescents . The book's core chapters are contributions from presenters at the 2003 Pacific Resources for Education and Learning (PREL) forum, which focused on vocabulary . To illustrate the relationship between vocabulary and literacy, all authors in the volume describe work showing that vocabulary experiences support conceptual learning and comprehension of text. The main feature of this book is that virtually all chapters d aw implications for vocabulary instruction from research .
Circulating microparticles as disease-specific biomarkers of severity of inflammation in patients with hepatitis C or nonalcoholic steatohepatitis.

BACKGROUND & AIMS
Microparticles released into the bloodstream upon activation or apoptosis of CD4(+) and CD8(+) T cells correlate with inflammation as determined by histologic analysis in patients with chronic hepatitis C (CHC). Patients with nonalcoholic fatty liver (NAFL) or nonalcoholic steatohepatitis (NASH) can be differentiated from those with CHC based on activation of distinct sets of immune cells in the liver.


METHODS
We compared profiles of circulating microparticles from patients with NAFL and NASH (n = 67) to those of CHC (n = 42), with healthy individuals (controls) using flow cytometry; the profiles were correlated with inflammation grade and fibrosis stage based on histologic analyses. We assessed the ability of the profiles to determine the severity of inflammation and fibrosis based on serologic and histologic analyses.


RESULTS
Patients with CHC had increased levels of microparticles from CD4(+) and CD8(+) T cells; the levels correlated with disease severity based on histologic analysis and levels of alanine aminotransferase. Patients with NAFL or NASH had significant increases in numbers of microparticles from invariant natural killer T cells and macrophages/monocytes (CD14(+)), which mediate pathogenesis of NASH. Microparticles from CD14(+) and invariant natural killer T cells correlated with levels of alanine aminotransferase and severity of NASH (based on histology). Levels of microparticles could differentiate between patients with NAFL or NASH and those with CHC, or either group of patients and controls (area under the receiver operating characteristic curves ranging from 0.56 to 0.99).


CONCLUSIONS
Quantification of immune cell microparticles from serum samples can be used to assess the extent and characteristics of hepatic inflammation in patients with chronic liver disease.
Design of superconducting MRI surface coil by using method of moment

A method of moment with an enhanced model to design high-temperature superconductor (HTS) RF surface coils for magnetic resonant image (MRI) is presented. The resonant frequency and quality factor ( ) of HTS RF spiral coils are simulated using this method. The agreements of resonant frequencies and s between the simulation and measurement are excellent with differences less than 1% and 3%, respectively. The 0.2m-thick YBaCuO (YBCO) thin films are deposited onto single side of 0.508-mm-thick LaAlO3 (LAO) and sapphire substrate and patterned into a spiral shape. To accurately analyze the resonant frequency and of a coil, an enhanced two-fluid model is employed. HTS RF coils with diameter of 65 mm for 0.2T and 1.5T MRI systems are designed and fabricated with the measured of 19 K and 23 K, respectively. In addition, the shift of resonant frequency due to the mutual coupling between two HTS spiral coils is predicted by this method, which is important for design of HTS coil arrays in an MRI system.
Highly photoactive, low bandgap TiO2 nanoparticles wrapped by graphene.

Highly photoactive, graphene-wrapped anatase TiO(2) nanoparticles are synthesized through one-step hydrothermal reduction of graphene oxide (GO) and TiO(2) crystallization from GO-wrapped amorphous TiO(2) NPs. Graphene-TiO(2) nanoparticles exhibit a red-shift of the band-edge and a significant reduction of the bandgap (2.80 eV). Graphene-TiO(2) nanoparticles possess excellent photocatalytic properties under visible light for the degradation of methylene blue.