LLukas22/scidocs huggingface dataset:
Evaluation of breakdown characteristics of gas insulated switchgears for non-standard lightning impulse waveforms - breakdown characteristics under non-uniform electric field

To lower the lightning impulse withstand voltage of gas insulated switchgear (GIS) while maintaining the high reliability of its insulation performance, it is important to define in an organized way the insulation characteristics for non-standard lightning impulse voltage waveforms that represent actual surge waveforms in the field and compare them with the characteristics for the standard lightning impulse waveform quantitatively. In the preceding researches, the dielectric breakdown voltage-time characteristics were measured under several different conditions on the quasi-uniform SF6 gas gap and partly the cone-shaped insulating spacers that represent an insulation element of GIS for six kinds of non-standard lightning impulse waveforms associated with lightning surges and disconnector switching surges. This paper describes obtaining through experiments the insulation characteristics for single-frequency oscillation waveforms as a representative waveform when there is a non-uniform electric field represented by metallic particles in the equipment while changing the applied voltage polarities, frequencies, and damping factors. As a result, it was found that the dielectric breakdown voltages are lower in the positive polarity and it was confirmed appropriate to conduct experiments mainly in positive-polarity in order to consider dielectric strengths. Furthermore, changing the frequencies and damping factors under positive-polarity waveforms did not cause major changes in the feature of the dielectric breakdown voltages, which remained constantly higher (by 1.41 to 2.58 times) than those under standard lightning impulse waveforms.
Corrosion protection of an AISI 321 stainless steel by SiC coatings

Abstract Silicon carbide coatings were produced by dynamic ion mixing (DIM) at room temperature and at 750 °C by ion beam sputtering of a SiC target and simultaneous bombardment with a 160 keV Ar + ion beam. The chemical composition of the coatings was determined by Rutherford backscattering and by nuclear reaction analysis. The microstructural state of the coatings was investigated by high resolution transmission electron microscopy whereas their density was determined by X-ray reflectometry. It is found that, for all the deposition temperatures, the DIM treatment promotes the crystallisation of the β-SiC phase. Passivation/corrosion tests performed in 1 N H 2 SO 4 indicate that the corrosion resistance is considerably improved by DIM regardless of the deposition temperature. It is suggested that the interface mixing along with the coating densification is responsible for the protective effect.
Effect of local anesthetics with and without vasoconstrictor agent in patients with ventricular arrhythmias.

BACKGROUND
The routine use of local anesthetics associated to vasoconstrictors for the dental treatment of patients with cardiopathies is still controversial, due to the risk of adverse cardiovascular effects.


OBJECTIVE
To evaluate and compare the hemodynamic effects of the use of local anesthetics with a non-adrenergic vasoconstrictor in patients with ventricular arrhythmia, when compared to the use of anesthetics without vasoconstrictor.


METHODS
A prospective randomized study evaluated 33 patients with positive serology for Chagas' disease and 32 patients with coronary artery disease that presented complex ventricular arrhythmia at Holter monitoring (>10 EV/h and NSVT), of which 21 were females, aged 54.73 + 7.94 years, submitted to routine dental treatment with pterygomandibular anesthesia. These patients were divided in two groups: group I received prilocaine 3% associated with felypressin 0.03 IU/ml and group II received lidocaine 2% without vasoconstrictor. The number and complexity of extrasystoles were analyzed, as well as the heart rate and systemic arterial pressure of the patients on the day before, one hour before, during the procedure and one hour after the dental procedure.


RESULTS
No hemodynamic alterations or increase in the number and complexity of the ventricular arrhythmia related to the anesthetic used in the dental procedure were observed in either group.


CONCLUSION
The results suggest that prilocaine 3% associated to a felypressin 0.03 IU/ml can be safely used in patients with Chagas' disease or coronariopathy with complex ventricular arrhythmia.
Effect of pre-stroke use of ACE inhibitors on ischemic stroke severity

BACKGROUND
Recent trials suggest that angiotensin-converting enzyme inhibitors (ACEI) are effective in prevention of ischemic stroke, as measured by reduced stroke incidence. We aimed to compare stroke severity between stroke patients who were taking ACEI before their stroke onset and those who were not, to examine the effects of pretreatment with ACEI on ischemic stroke severity.


METHODS
We retrospectively studied 126 consecutive patients presenting within 24 hours of ischemic stroke onset, as confirmed by diffusion-weighted magnetic resonance imaging (DWI). We calculated the NIHSS score at presentation, as the primary measure of clinical stroke severity, and categorized stroke severity as mild (NIHSS [less than or equal to] 7), moderate (NIHSS 8-13) or severe (NIHSS [greater than or equal to] 14). We analyzed demographic data, risk-factor profile, blood pressure (BP) and medications on admissions, and determined stroke mechanism according to TOAST criteria. We also measured the volumes of admission diffusion- and perfusion-weighted (DWI /PWI) magnetic resonance imaging lesions, as a secondary measure of ischemic tissue volume. We compared these variables among patients on ACEI and those who were not.


RESULTS
Thirty- three patients (26%) were on ACE-inhibitors. The overall median baseline NIHSS score was 5.5 (range 2-21) among ACEI-treated patients vs. 9 (range 1-36) in non-ACEI patients (p = 0.036). Patients on ACEI prior to their stroke had more mild and less severe strokes, and smaller DWI and PWI lesion volumes compared to non-ACEI treated patients. However, none of these differences were significant. Predictably, a higher percentage of patients on ACEI had a history of heart failure (p = 0.03). Age, time-to-imaging or neurological evaluation, risk-factor profile, concomitant therapy with lipid lowering, other antihypertensives or antithrombotic agents, or admission BP were comparable between the two groups.


CONCLUSION
Our results suggest that ACE-inhibitors may reduce the clinical severity of stroke, as measured by NIHSS score. Further, larger-scale, prospective studies are needed to validate our findings, and to elucidate the mechanism(s) of ACEImediated benefits in patients with ischemic stroke.
Robust speaker turn role labeling of TV Broadcast News shows

Speaker role recognition in TV Broadcast News shows is addressed in this paper with a particular focus on speaker turn role labeling. A mixed approach combining speaker clustering and analysis of Automatic Speech Recognition output is proposed for assigning speaker turns a role among: anchor, reporter and other. 86% classification accuracy is obtained for automatically segmented speaker turns on a 6.5 hours test corpus of 14 TVBN shows mixing news and conversational speech.
Techniques and applications for sentiment analysis

The main applications and challenges of one of the hottest research areas in computer science.
Ontological Constructs to Create Money Laundering Schemes

There is an increasing tendency in the money laundering sector to utilize electronic commerce and web services. Misuse of web services and electronic money transfers occurs at many points in complex trading schemes. We provide ontological components that can be combined to construct some of these money laundering schemes. These constructs can be helpful for investigators, in order to decompose suspected financial schemes and recognize
Outcomes Following Endoscopic Stapes Surgery.

There are limited studies describing the surgical and hearing outcomes following endoscopic stapes surgeries, despite the burgeoning interest and excitement in endoscopic ear surgery. Current studies have demonstrated that endoscopic stapes surgery is safe and has similar audiologic outcomes when compared with microscopic stapes procedures. However, preliminary studies show decreased postoperative pain in endoscopic cases compared with microscopic controls. In regards to possible endoscopic advantages, these few studies demonstrate mixed results when comparing the need to remove the bony medial external auditory canal wall to improve visualization and access to the oval window niche.
A novel tunable origami accordion antenna

A novel origami accordion antenna structure is presented, which can be expanded and collapsed. Based on this structure, one origami antenna is designed with operating frequency that can be changed based on its height. The return loss, far-field radiation pattern and peak gain of this antenna are examined.
Business Process Management

Process, 347 Abstraction Concepts, 75ion Concepts, 75 Horizontal Abstraction, 75 Vertical Abstraction, 77
A picture of health--myocardial infarction patients' drawings of their hearts and subsequent disability: a longitudinal study.

OBJECTIVE
The aim of this study was to examine whether myocardial infarction (MI) patients' drawings of their hearts predict subsequent return to work, exercise, distress about symptoms and perceptions of recovery at 3 months.


METHODS
Just prior to hospital discharge, 74 consecutive patients aged under 70 admitted with an acute MI drew pictures of their hearts. Patients' recovery was assessed at 3 months by postal questionnaire.


RESULTS
Patients who drew damage on their heart while in the hospital perceived that their heart had recovered less at 3 months (P = .005), that their heart condition would last longer (P = .01) and had lower perceived control over their heart condition (P = .05) than did patients who drew no damage. The amount of damage drawn on the heart was also associated with a slower return to work (r = .37, P < .05). While patients' peak troponin-T in the hospital was associated with the amount of damage drawn (r = .41, P < .001), it was not associated with the speed of return to work or other 3-month outcomes, apart from perceived duration of heart condition (r = .26, P < .05).


CONCLUSION
Patients drawings of damage on their hearts after a MI predict recovery better than do medical indicators of damage. Drawings offer a simple starting point for doctors to assess patients' ideas when discussing their heart condition and an opportunity to counter illness negative beliefs.
Energy efficiency assessment of wireless access networks utilizing indoor base stations

Energy efficiency in mobile radio networks has recently gained great interest due to escalating energy cost and environmental concerns. Rapidly growing demand for capacity will require denser and denser networks which further increase the energy consumption. In this regard, the deployment of small cells under macro-cellular umbrella coverage appears a promising solution to cope with the explosive demand in an energy efficient manner. In this paper, we investigate the impact of joint macro-and femtocell deployment on energy efficiency of wireless access networks, based on varying area throughput requirements. We take into account the the co-channel interference, fraction of indoor users, femto base station density and backhaul power consumption. It is shown that utilizing indoor base stations provide significant energy savings compared to traditional macro only network in urban areas with medium and high user demand where the gain increases up to 75 percent as more data traffic is offloaded to femtocells.
A randomized, double-blind, placebo-controlled, parallel-group study to evaluate the efficacy and safety of osmotic-controlled release oral delivery system methylphenidate HCl in adults with attention-deficit/hyperactivity disorder in Japan.

OBJECTIVES
To evaluate the safety and efficacy of osmotic-controlled release oral delivery system (OROS) methylphenidate (MPH) HCl in adults with attention-deficit/hyperactivity disorder (ADHD).


METHODS
In this study, 284 adults with ADHD were randomized to OROS MPH or placebo. During the 4-week titration period, patients were titrated from a starting dose of 18 mg once daily to an individually-optimized dose of up to 72 mg once daily in weekly 18-mg increments. Patients continued on their individualized dose during the 4-week efficacy assessment period. The primary efficacy endpoint was change in DSM-IV Total ADHD Symptoms subscale score of Conners' Adult ADHD Rating Scale-Observer: Screening Version (CAARS-O:SV) from baseline to endpoint.


RESULTS
The mean change in DSM-IV Total ADHD Symptoms subscale score of CAARS-O:SV was significantly larger with OROS MPH compared with placebo (P < 0.0001, ANCOVA). Similar results were observed for the majority of secondary endpoints, including CAARS-O:SV total score and other subscale scores. Although treatment-emergent adverse events were reported more frequently in the OROS MPH group (81.8%) versus the placebo group (53.9%), OROS-MPH showed a well-tolerated safety profile overall.


CONCLUSIONS
OROS MPH in a dose range of 18-72 mg once daily was effective and well-tolerated in adult patients with ADHD.
An EMI-Resistant Common-Mode Cancelation Differential Input Stage in UMC 180 nm CMOS

This letter presents an on-chip common-mode cancelation circuit (CMCC), which increases the immunity to electromagnetic interference (EMI) of the input stage in a classic CMOS operational amplifier. Two test chips, containing a classic Miller amplifier and a Miller amplifier with CMCC, respectively, have been fabricated in the UMC 180 nm CMOS process. Measurements illustrate how the latter amplifier exhibits an increased immunity to EMI compared with the former.
A Neural Network-Based Novelty Detector for Image Sequence Analysis

This paper proposes a new model of "novelty detection" for image sequence analysis using neural networks. This model uses the concept of artificially generated negative data to form closed decision boundaries using a multilayer perceptron. The neural network output is novelty filtered by thresholding the output of multiple networks (one per known class) to which the sample is input and clustered for determining which clusters represent novel classes. After labeling these novel clusters, new networks are trained on this data. We perform experiments with video-based image sequence data containing a number of novel classes. The performance of the novelty filter is evaluated using two performance metrics and we compare our proposed model on the basis of these with five baseline novelty detectors. We also discuss the results of retraining each model after novelty detection. On the basis of Chi-square performance metric, we prove at 5 percent significance level that our optimized novelty detector performs at the same level as an ideal novelty detector that does not make any mistakes
Alcohol's role in sexual violence perpetration: theoretical explanations, existing evidence and future directions.

ISSUES
There is controversy regarding the extent to which alcohol plays a causal role in sexual assault perpetration.


APPROACH
This paper critically reviews the relevant alcohol administration and survey research literature.


KEY FINDINGS
Alcohol administration researchers have randomly assigned male participants to drink conditions prior to exposure to an acquaintance rape scenario. As compared to sober participants, intoxicated participants find the male character's use of force to obtain sex more acceptable and express greater willingness to act in a similar manner. In several studies, these effects are strongest for intoxicated men with hostile attitudes toward women. Survey researchers have asked male participants to describe incidents in which they behaved in a sexually aggressive manner. Men who commit sexual assault when drinking report having traits, attitudes and experiences similar to those of other perpetrators except in the alcohol domain. Perpetrators who commit sexual assault when drinking tend to drink more than other perpetrators in sexual situations and have stronger expectancies regarding alcohol's effects on sexual behaviour.


IMPLICATIONS
Overall, research suggests that alcohol interacts with personality and aspects of the situation, adding to the risk of perpetration among men already predisposed to engaging in sexual aggression.


CONCLUSIONS
Although there are no simple answers to questions about alcohol's role in sexual assault, research suggests that intoxication may be a more important determinant of when some men commit sexual aggression, rather than who becomes sexually aggressive.
Outcomes of complete vs targeted approaches to endoscopic sinus surgery.

BACKGROUND
Functional endoscopic sinus surgery (FESS) was historically predicated on targeted widening of narrow anatomic structures that caused postobstructive persistent sinus inflammation. It is now clear that chronic rhinosinusitis (CRS) is a multifactorial disease with subsets of patients which may require a more extensive surgical approach. This study compares quality-of-life (QOL) and disease severity outcomes after FESS based on the extent of surgical intervention.


METHODS
Participants with CRS were prospectively enrolled into an ongoing, multi-institutional, observational, cohort study. Surgical extent was determined by physician discretion. Participants undergoing bilateral frontal sinusotomy, ethmoidectomy, maxillary antrostomy, and sphenoidotomy were considered to have undergone "complete" surgery, whereas all other participants were categorized as receiving "targeted" surgery. Improvement was evaluated between surgical subgroups with at least 6-month follow-up using the 22-item Sino-Nasal Outcome Test (SNOT-22) and the Brief Smell Inventory Test (B-SIT).


RESULTS
A total of 311 participants met inclusion criteria with 147 subjects undergoing complete surgery and 164 targeted surgery. A higher prevalence of asthma, acetylsalicylic acid (ASA) sensitivity, nasal polyposis, and a history of prior sinus surgery (p ≤ 0.002) was present in participants undergoing complete surgery. Mean improvement in SNOT-22 (28.1 ± 21.9 vs 21.9 ± 20.6; p = 0.011) and B-SIT (0.8 ± 3.1 vs 0.2 ± 2.4; p = 0.005) was greater in subjects undergoing complete surgery. Regression models demonstrated a 5.9 ± 2.5 greater relative mean improvement on SNOT-22 total scores with complete surgery over targeted approaches (p = 0.016).


CONCLUSION
Complete surgery was an independent predictor of greater postoperative SNOT-22 score improvement, yet did not achieve clinical significance. Further study is needed to determine the optimal surgical extent.
Omnidirectional dense large-scale mapping and navigation based on meaningful triangulation

In this work, we propose a robust and efficient method to build dense 3D maps, using only the images grabbed by an omnidirectional camera. The map contains exhaustive information about both the structure and the appearance of the environment and it is well suited also for large scale environments.
Lesions in the splenium of the corpus callosum: Clinical and radiological implications

Background: Brain MRI may unexpectedly display abnormalities in splenium of the corpus callosum (SCC). However, the clinical implications of this lesion are unclear and are not always consistent with ischemic infarctions. We performed this study to clarify the clinical and radiological implications in patients with SCC lesions. Methods: We retrospectively reviewed consecutive patients with MRIreported SCC changes between 2009 and 2012. We analyzed clinical and radiological findings, etiologies, cognitive impairment, and clinical outcomes. Results: We found 30 patients (16 females; mean 50.5 years) who had SCC lesions on MRI. Confusion was the most common clinical finding in 50% of cases. Cerebral infarction was the most common etiology (50%). The most consistent SCC changes on MRI were low signal in T1WI, high signal on T2WI and FLAIR, and high signal on DWI. We classified SCC lesions into in situ SCC lesions (SCC only) and multiple (SCC plus) lesions for patients with multiple lesions. The clinical symptoms of SCC only lesions were relatively mild. Cognitive functions were evaluated by Mini Mental State Examination (MMSE) and clinical dementia rating (CDR) scale at the time of discharge and patients with SCC only lesions showed less impaired cognition compared with those with SCC plus lesions. Clinical outcomes were evaluated by the modified Rankin scale at 1 month and patients with SCC only lesions revealed good clinical outcomes compared with those with SCC plus lesions. Conclusions: MRI-reported SCC lesions may have heterogeneous etiologies and present with various symptoms. The clinical course and outcome are relatively good, particularly in small isolated and oval shaped SCC lesions. Neurology Asia 2014; 19(1) : 79 – 88 Address correspondence to: Seok-Beom Kwon, MD PhD, Department of Neurology, Hallym University College of Medicine,948-1, DaeRim1-Dong, YoengDeungPo-Gu, Seoul, 150-950, Korea. Tel: +82-02-829-5125, Fax: +82-2-847-1617, Email: neukwon@hallym.ac.kr INTRODUCTION Splenium of the corpus callosum (SCC) abnormalities on magnetic resonance imaging (MRI) have been reported commonly and unexpectedly in many cases. Such SCC lesions are usually reversible and associated with many etiologies and clinical symptoms. However, the implications of an SCC abnormality are unclear and are not always associated with ischemic infarctions. Possible causes of SCC abnormalities include infarction, trauma, tumor, alcohol abuse, seizure, heat stroke, multiple sclerosis, epilepsy, drug intoxication, and panhypopituitarism. Many studies have been performed on this topic but most studies are limited to case reports of SCC lesions or special diseases and reviews with published cases. Thus, knowledge about SCC lesions is fragmentary. We undertook this study to evaluate clinical and radiologic findings, etiologies, cognitive impairment, and outcomes of patients with SCC abnormalities noted on brain MRI.