LLukas22/scidocs huggingface dataset:
Sleepiness in Spanish nursing staff--influence of chronotype and care unit in circadian rhythm impairment: research protocol.

AIMS
To determine how prevalent circadian rhythm impairments are in nurses working in medical, surgical and intensive care units in five Spanish hospitals and how the quality of night-time sleeping and sleepiness affect the nurses' morning and evening chronotypes.


BACKGROUND
Shift work is a recognized work pattern for nurses in all countries. Given the important role that nurses play in hospital care, it is vital to establish what repercussions this has on the nurses' working schedules and how any disturbance in circadian rhythm affects patient safety.


DESIGN
A multicentre, observational, descriptive and cross-sectional study in seven hospitals in the Spanish National Health System.


METHOD
A stratified sample of 1,300 nurses is being collected in three types of units: medical, surgical and intensive care. The 3-year study started in January 2012 and will continue until December 2014, with no exclusion criteria. The Kronowise(®) will be used to monitor the nurses' circadian rhythms, by recording their activity, position and wrist temperature. We will also use three questionnaires to evaluate sleep quality, daytime drowsiness and chronotype: (a) Pittsburg Sleep Quality Index; (b) Epworth Daytime Sleepiness Scale; and (c) Morning and Evening Questionnaire. Data will be collected from each hospital and statistical analysis will be carried out using the SPSS 19.0.


DISCUSSION
The study findings will show the current state of the nurses' circadian rhythms and how shift work can affect them and their job performance. Funding for this 3-year study was granted in December 2011 by the Spanish Health Research Fund (PI 11/00646, Health Ministry). This project is also funded by the Instituto de Salud Carlos III (RETICEF, RD12/0043/0011, RD12/0043/0006).
Sparse projections for high-dimensional binary codes

This paper addresses the problem of learning long binary codes from high-dimensional data. We observe that two key challenges arise while learning and using long binary codes: (1) lack of an effective regularizer for the learned high-dimensional mapping and (2) high computational cost for computing long codes. In this paper, we overcome both these problems by introducing a sparsity encouraging regularizer that reduces the effective number of parameters involved in the learned projection operator. This regularizer not only reduces overfitting but, due to the sparse nature of the projection matrix, also leads to a dramatic reduction in the computational cost. To evaluate the effectiveness of our method, we analyze its performance on the problems of nearest neighbour search, image retrieval and image classification. Experiments on a number of challenging datasets show that our method leads to better accuracy than dense projections (ITQ [11] and LSH [16]) with the same code lengths, and meanwhile is over an order of magnitude faster. Furthermore, our method is also more accurate and faster than other recently proposed methods for speeding up high-dimensional binary encoding.
A Secure And High Capacity Image Steganography Technique

Steganography is the science of “invisible” communication. The purpose of Steganography is to maintain secret communication between two parties. The secret information can be concealed in content such as image, audio, or video. This paper provides a novel image steganography technique to hide multiple secret images and keys in color cover image using Integer Wavelet Transform (IWT). There is no visual difference between the stego image and the cover image. The extracted secret images are also similar to the original secret images. Very good PSNR (Peak Signal to Noise Ratio) values are obtained for both stego and extracted secret images. The results are compared with the results of other techniques, where single image is hidden and it is found that the proposed technique is simple and gives better PSNR values than others.
Performance Evaluation of Bandwidth and QoS Aware LTE Uplink Scheduler

A Long Term Evolution (LTE) eNodeB Medium Access Control (MAC) uplink scheduler is proposed in this paper for Single Carrier Frequency Division Multiple Access (SC-FDMA) as the uplink transmission scheme. Uplink scheduling algorithms available in literature commonly do not consider all the essential features of the LTE uplink. The proposed scheduler is shown to provide efficient allocation of radio resources to User Equipments (UEs) according to Quality of Service (QoS) of various traffic classes and the instantaneous channel conditions. The scheduler functionality is divided into Time Domain Packet Scheduling (TDPS) and Frequency Domain Packet Scheduling (FDPS). The proposed scheduler also supports multi-bearer UEs. The performance of the proposed scheduler is compared with common TDPS schedulers like Blind Equal Throughput (BET), Maximum Throughput (MT) and Proportional Fair (PF). The results show that the proposed scheduler guarantees provision of QoS to UEs and achieves an acceptable performance in terms of throughput.
Nursing students' perceptions of learning in practice environments: a review.

Effective clinical learning requires integration of nursing students into ward activities, staff engagement to address individual student learning needs, and innovative teaching approaches. Assessing characteristics of practice environments can provide useful insights for development. This study identified predominant features of clinical learning environments from nursing students' perspectives across studies using the same measure in different countries over the last decade. Six studies, from three different countries, using the Clinical Leaning Environment Inventory (CLEI) were reviewed. Studies explored consistent trends about learning environment. Students rated sense of task accomplishment high. Affiliation also rated highly though was influenced by models of care. Feedback measuring whether students' individual needs and views were accommodated consistently rated lower. Across different countries students report similar perceptions about learning environments. Clinical learning environments are most effective in promoting safe practice and are inclusive of student learners, but not readily open to innovation and challenges to routine practices.
Tachycardia-related channel in the scar tissue in patients with sustained monomorphic ventricular tachycardias: influence of the voltage scar definition.

BACKGROUND
Endocardial mapping before sustained monomorphic ventricular tachycardia (SMVT) induction may reduce mapping time during tachycardia and facilitate the ablation of unmappable VT.


METHODS AND RESULTS
Left ventricular electroanatomic voltage maps obtained during right ventricular apex pacing in 26 patients with chronic myocardial infarction referred for VT ablation were analyzed to identify conducting channels (CCs) inside the scar tissue. A CC was defined by the presence of a corridor of consecutive electrograms differentiated by higher voltage amplitude than the surrounding area. The effect of different levels of voltage scar definition, from 0.5 to 0.1 mV, was analyzed. Twenty-three channels were identified in 20 patients. The majority of CCs were identified when the voltage scar definition was < or =0.2 mV. Electrograms with > or =2 components were recorded more frequently at the inner than at the entrance of CCs (100% versus 75%, P< or =0.01). The activation time of the latest component was longer at the inner than at the entrance of CCs (200+/-40 versus 164+/-53 ms, P< or =0.001). Pacing from these CCs gave rise to a long-stimulus QRS interval (110+/-49 ms). Radiofrequency lesion applied to CCs suppressed the inducibility in 88% of CC-related tachycardias. During a follow-up of 17+/-11 months, 23% of the patients experienced a VT recurrence.


CONCLUSIONS
CCs represent areas of slow conduction that can be identified in 75% of patients with SMVT. A tiered decreasing-voltage definition of the scar is critical for CC identification.
Cellular fatty acid metabolism and cancer.

Cancer cells often have characteristic changes in metabolism. Cellular proliferation, a common feature of all cancers, requires fatty acids for synthesis of membranes and signaling molecules. Here, we provide a view of cancer cell metabolism from a lipid perspective, and we summarize evidence that limiting fatty acid availability can control cancer cell proliferation.
Combining Visual and Textual Systems within the Context of User Feedback

It has been proven experimentally, that a combination of textual and visual representations can improve the retrieval performance ([20], [23]). It is due to the fact, that the textual and visual feature spaces often represent complementary yet correlated aspects of the same image, thus forming a composite system.
Radiofrequency catheter ablation maintains its efficacy better than antiarrhythmic medication in patients with paroxysmal atrial fibrillation: On-treatment analysis of the randomized controlled MANTRA-PAF trial.

BACKGROUND
The Medical ANtiarrhythmic Treatment or Radiofrequency Ablation in Paroxysmal Atrial Fibrillation (MANTRA-PAF) is a randomized trial comparing radiofrequency catheter ablation (RFA) to antiarrhythmic drugs (AADs) as first-line treatment of paroxysmal atrial fibrillation (PAF). In order to eliminate the clouding effect of crossover we performed an on-treatment analysis of the data.


METHODS AND RESULTS
Patients (n=294) were divided into three groups: those receiving only the assigned therapy (RFA and AAD groups) and those receiving both therapies (crossover group). The primary end points were AF burden in 7-day Holter recordings at 3, 6, 12, 18, and 24 months and cumulative AF burden in all recordings. At 24 months, AF burden was significantly lower in the RFA (n=110) than in the AAD (n=92) and the crossover (n=84) groups (90th percentile 1% vs. 10% vs. 16%, P=0.007), and more patients were free from any AF (89% vs. 73% vs. 74%, P=0.006). In the RFA, AAD and the crossover groups 63%, 59% and 21% (P<0.001) of the patients had no AF episodes in any Holter recording, respectively. Quality of life improved significantly in all groups. There were no differences in serious adverse events between the RFA, AAD and crossover groups (19% vs. 8% vs. 23%) (P=0.10).


CONCLUSIONS
In the treatment of antiarrhythmic therapy naïve patients with PAF long-term efficacy of RFA was superior to AAD therapy. Thus, it is reasonable to offer RFA as first-line treatment for highly symptomatic patients who accept the risks of the procedure and are aware of frequent need for reablation(s).
Visual abnormal behavior detection based on trajectory sparse reconstruction analysis

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract 19 Abnormal behavior detection has been one of the most important research branches in intelligent video content 20 analysis. In this paper, we propose a novel abnormal behavior detection approach by introducing trajectory 21 sparse reconstruction analysis (SRA). Given a video scenario, we collect trajectories of normal behaviors and 22 extract the control point features of cubic B-spline curves to construct a normal dictionary set, which is further 23 divided into Route sets. On the dictionary set, sparse reconstruction coefficients and residuals of a test trajectory 24 to the Route sets can be calculated with SRA. The minimal residual is used to classify the test behavior into a 25 normal behavior or an abnormal one. SRA is solved by L1-norm minimization, leading to that a few of dictionary 26 samples are used when reconstructing a behavior trajectory, which guarantees that the proposed approach is 27 valid even when the dictionary set is very small. Experimental results with comparisons show that the proposed 28 approach improves the state-of-the-art.
Demands, values, and burnout: relevance for physicians.

OBJECTIVE
T o explore the interaction between workload and values congruence (personal values with health care system values) in the context of burnout and physician engagement and to explore the relative importance of these factors by sex, given the distinct work patterns of male and female physicians.


DESIGN
National mailed survey.


SETTING
Canada.


PARTICIPANTS
A random sample of 8100 Canadian physicians (response rate 40%, N = 3213); 2536 responses (from physicians working more than 35 hours per week) were analyzed.


MAIN OUTCOME MEASURES
Levels of burnout, values congruence, and workload, by sex, measured by the Maslach Burnout Inventory-General Scale and the Areas of Worklife Scale.


RESULTS
Results showed a moderate level of burnout among Canadian physicians, with relatively positive scores on exhaustion, average scores on cynicism, and mildly negative scores on professional efficacy. A series of multiple regression analyses confirmed parallel main effect contributions from manageable workload and values congruence. Both workload and values congruence predicted exhaustion and cynicism for men and women (P = .001). Only values congruence provided a significant prediction of professional efficacy for both men and women (P = .001) These predictors interacted for women on all 3 aspects of burnout (exhaustion, cynicism, and diminished efficacy). Howevever, overall levels of the burnout indicators departed only modestly from normative levels.


CONCLUSION
W orkload and values congruence make distinct contributions to physician burnout. Work overload contributes to predicting exhaustion and cynicism; professional values crises contribute to predicting exhaustion, cynicism, and low professional efficacy. The interaction of values and workload for women in particular has implications for the distinct work-life patterns of male and female physicians. Specifically, the congruence of individual values with values inherent in the health care system appeared to be of greater consequence for women than for men.
Learning the law

Divisions of law. The mechanism of scholarship. The European dimension. Methods of study. Technical terms. Case law technique. Interpretation of statutes. Working out problems. Answering essay questions. The examination. Moots and mock trials. Legal research. From learning to earning. General reading.
Autologous nonmyeloablative hematopoietic stem cell transplantation in newly diagnosed type 1 diabetes mellitus.

CONTEXT
Type 1 diabetes mellitus (DM) results from a cell-mediated autoimmune attack against pancreatic beta cells. Previous animal and clinical studies suggest that moderate immunosuppression in newly diagnosed type 1 DM can prevent further loss of insulin production and can reduce insulin needs.


OBJECTIVE
To determine the safety and metabolic effects of high-dose immunosuppression followed by autologous nonmyeloablative hematopoietic stem cell transplantation (AHST) in newly diagnosed type 1 DM.


DESIGN, SETTING, AND PARTICIPANTS
A prospective phase 1/2 study of 15 patients with type 1 DM (aged 14-31 years) diagnosed within the previous 6 weeks by clinical findings and hyperglycemia and confirmed with positive antibodies against glutamic acid decarboxylase. Enrollment was November 2003-July 2006 with observation until February 2007 at the Bone Marrow Transplantation Unit of the School of Medicine of Ribeirão Preto, Ribeirão Preto, Brazil. Patients with previous diabetic ketoacidosis were excluded after the first patient with diabetic ketoacidosis failed to benefit from AHST. Hematopoietic stem cells were mobilized with cyclophosphamide (2.0 g/m2) and granulocyte colony-stimulating factor (10 microg/kg per day) and then collected from peripheral blood by leukapheresis and cryopreserved. The cells were injected intravenously after conditioning with cyclophosphamide (200 mg/kg) and rabbit antithymocyte globulin (4.5 mg/kg).


MAIN OUTCOME MEASURES
Morbidity and mortality from transplantation and temporal changes in exogenous insulin requirements (daily dose and duration of usage). Secondary end points: serum levels of hemoglobin A1c, C-peptide levels during the mixed-meal tolerance test, and anti-glutamic acid decarboxylase antibody titers measured before and at different times following AHST.


RESULTS
During a 7- to 36-month follow-up (mean 18.8), 14 patients became insulin-free (1 for 35 months, 4 for at least 21 months, 7 for at least 6 months; and 2 with late response were insulin-free for 1 and 5 months, respectively). Among those, 1 patient resumed insulin use 1 year after AHST. At 6 months after AHST, mean total area under the C-peptide response curve was significantly greater than the pretreatment values, and at 12 and 24 months it did not change. Anti-glutamic acid decarboxylase antibody levels decreased after 6 months and stabilized at 12 and 24 months. Serum levels of hemoglobin A(1c) were maintained at less than 7% in 13 of 14 patients. The only acute severe adverse effect was culture-negative bilateral pneumonia in 1 patient and late endocrine dysfunction (hypothyroidism or hypogonadism) in 2 others. There was no mortality.


CONCLUSIONS
High-dose immunosuppression and AHST were performed with acceptable toxicity in a small number of patients with newly diagnosed type 1 DM. With AHST, beta cell function was increased in all but 1 patient and induced prolonged insulin independence in the majority of the patients.
Twittering to increase student engagement in the university classroom

In this paper, we explored the research question: Does Twitter in a large-lecture format university course produced a difference in levels of selfreported student engagement? To do so, we utilize a quasi-experimental design testing the effect of Twitter on student engagement in introductory sociology and anthropology courses. Our hypotheses predicted that students using Twitter would report higher levels of five forms of student engagement (academic, intellectual, peer, and beyond-class engagement, along with an overall engagement variable). While peer-reviewed literature and others’ anecdotal reporting would lead us to expect a positive result, we found no significant difference in any form of engagement when Twitter was part of the course than when it was not. In fact, we found that students enrolled in the control (nonTwitter) condition perceived significantly higher levels of academic engagement then those in the experimental (used Twitter) condition. We also included a second set of hypothesis predicting that students who reported enjoying using Twitter would perceive of themselves as more engaged than those who did not enjoy Twitter. These hypotheses were supported across all forms of engagement. We report these findings and utilize comments from an open-ended questionnaire to explore potential reasons accounting for these differences and how students perceived Twitter as a classroom tool.
Prophylaxis with erythropoietin versus placebo reduces acute kidney injury and neutrophil gelatinase-associated lipocalin in patients undergoing cardiac surgery: a randomized, double-blind controlled trial

BACKGROUND
Cardiac surgery-associated acute kidney injury (CSA-AKI) is a common complication following coronary bypass graft (CABG) surgery. Multi-factorial causes of CSA-AKI involve oxidative stress and inflammation. Erythropoietin (EPO) has been shown from many studies to have a reno-protective effect. The present study was conducted to examine the role of EPO in preventing CSA-AKI.


METHODS
This prospective, randomized, double-blind, placebo-controlled trial was conducted in the Cardiovascular and Thoracic Unit. One hundred patients randomly received either 200 U/kg of rHuEPO (n = 50) or saline (n = 50) intravenously three days before operation, and rHuEPO 100 U/kg or saline at operation time. The serum creatinine (SCr), estimated glomerular filtration rate (eGFR) and urine neutrophil gelatinase-associated lipocaline (NGAL) were measured in order to evaluate renal injury following CABG.


RESULTS
The incidence of CSA-AKI was significantly lower in rHuEPO group (14%) when compared with the placebo group (38%; p < 0.01). The mean intensive care unit (ICU) and hospital stays of the rHuEPO group were significantly shorter than the placebo group (p < 0.01). Postoperative increases in SCr and decreases in eGFR were significantly lower in the rHuEPO group than the placebo group (p < 0.05). The mean urine NGAL in rHuEPO group was significantly lower than the placebo group at 3 hr, 6 hr, 12 hr and 18 hr after CABG (p < 0.05), respectively.


CONCLUSIONS
Prophylaxis administration with intravenous rHuEPO before cardiac surgery decreased the incidence of CSA-AKI and urine NGAL with reduced days in ICU and hospital in elective CABG patients.


TRIAL REGISTRATION
ClinicalTrials.gov: NCT01066351.
Investigation in FIR filter to improve power efficiency and delay reduction

In design of Finite Impulse Response (FIR) filter using adder, coefficients and multiplication are used. Multiple Constant Multiplication (MCM) is the algorithm which is used in FIR designing to minimize complexity of the circuit, increased delay and multiplication using large area. These problems can be optimized by using new technique known as digit-serial multiple constant multiplications. It reduces the complexity, delay and area utilization. Along with this already existed method, the modified carry select adder implemented in the current paper. It shows that there should be 10-20% increment in power efficiency and 50% reduction in delay compared to already exist techniques.
More Evidence on the Value of Chinese Workers' Psychological Capital: A Potentially Unlimited Competitive Resource?

As China continues its unprecedented economic growth and emergence as a world power, new solutions must be forthcoming to meet the accompanying challenges. We propose a positive approach to Chinese HRM that recognizes, develops and manages the psychological capital (PsyCap) of workers. After providing a brief overview of hope, efficacy, optimism, resilience and overall PsyCap in today’s Chinese context, the results of a follow-up study provide further evidence that the PsyCap of Chinese workers is related to their performance. The implications that this evidencebased value of Chinese workers’ psychological capital has for China now and into the future concludes this study.