LLukas22/scidocs huggingface dataset:
Erectile dysfunction in severe sleep apnea patients and response to CPAP

The aim of this study was to investigate frequency and degree of ED in patients with severe sleep apnea and to evaluate the results of only continuous positive airway pressure (CPAP) therapy on ED in patients with severe obstructive sleep apnea syndrome (OSAS). This was a prospective clinical trial study. Patients with severe sleep apnea (40) were randomized into two groups. Multiple questionnaire investigation and laboratory evaluation were performed for ED, severity of OSAS and psychological status. Group 1 was treated with CPAP and group 2 was treated with only antidepressant medication for at least 1 month. Patients were evaluated after 1 month of therapy and compared with initial ones. Before CPAP, the International Index of Erectile Function (IIEF)-5 scores were significantly correlated only with body mass index (BMI; P=0.007) and not correlated significantly with Epworth Sleepiness Scale scores (P=0.286), lowest SaO2 (P=0.182), Beck's Depression Inventory scores (P=0.302) and apnea/hypopnea index (P=0.279). After 1 month of regular CPAP usage, mean value of IIEF-5 score was 15.71±5.12 before CPAP and were improved up to 19.06±3.94, statistically significant. All subjects responded positively to the CPAP treatment and their erection status was improved positively. We have found a correlation between severe OSAS and ED. CPAP is effective in improvement of sexual performance of these patients.
Assessing the origins, evolution and prospects of the literature on dynamic capabilities: A bibliometric analysis

The purpose of this study is to serve as orientation and guidance to academics that are starting or currently developing their research within the field of dynamic capabilities, in order to enhance their knowledge about which are the key scientific journals, authors and articles shaping this topic. This paper presents a bibliometric analysis on dynamic capabilities, making use of the Web of Science database to perform it. This analysis comprises fundamental issues such as (i) the number of studies published per year, (ii) the countries with the highest rate of productivity, (iii) the most prolific and influential authors, (iv) assessment of studies citing dynamic capabilities, and (v) the most productive journals on dynamic capabilities and recent studies on this topic. Results reveal an exponential growth in the number of publications on dynamic capabilities for the 2000–2012 period. Although, since 2012 this growth has decelerated, the number of publications on this topic remains noteworthy. This study brings useful information for those academics and practitioners attempting to analyze and deepen within this particular field of research, at the same time that provides some insights concerning the future development and progress of the dynamic capabilities topic in the management, business and economics academic literature. © 2017 AEDEM. Published by Elsevier España, S.L.U. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
A Novel maximum power point tracker controlling several converters connected to photovoltaic arrays with particle swarm optimization technique

This paper deals with maximum power point tracking control of photovoltaic generators. Photovoltaic generation systems need maximum power point tracker because the PV power output depends on the operating terminal voltage and current. Further, the PV array exhibits two or more MPP's under partial shading condition and hence finding the MPP using conventional techniques is a difficult task. To overcome the difficulty, finding the MPP, the authors have proposed a novel MPPT algorithm by introducing Particle Swarm Optimization technique. Further, the proposed algorithm uses only one pair of sensors to control multiple PV arrays. This results in lower cost, higher overall efficiency and also the algorithm is simple. Proposed MPPT algorithm is verified through experimental studies. Several partial shading conditions were tested and in all these cases the algorithm takes about one second to reach the global MPP. The reachability to MPP is good in both shading and unshading.
Susceptibility tensor imaging (STI) of the brain.

Susceptibility tensor imaging (STI) is a recently developed MRI technique that allows quantitative determination of orientation-independent magnetic susceptibility parameters from the dependence of gradient echo signal phase on the orientation of biological tissues with respect to the main magnetic field. By modeling the magnetic susceptibility of each voxel as a symmetric rank-2 tensor, individual magnetic susceptibility tensor elements as well as the mean magnetic susceptibility and magnetic susceptibility anisotropy can be determined for brain tissues that would still show orientation dependence after conventional scalar-based quantitative susceptibility mapping to remove such dependence. Similar to diffusion tensor imaging, STI allows mapping of brain white matter fiber orientations and reconstruction of 3D white matter pathways using the principal eigenvectors of the susceptibility tensor. In contrast to diffusion anisotropy, the main determinant factor of the susceptibility anisotropy in brain white matter is myelin. Another unique feature of the susceptibility anisotropy of white matter is its sensitivity to gadolinium-based contrast agents. Mechanistically, MRI-observed susceptibility anisotropy is mainly attributed to the highly ordered lipid molecules in the myelin sheath. STI provides a consistent interpretation of the dependence of phase and susceptibility on orientation at multiple scales. This article reviews the key experimental findings and physical theories that led to the development of STI, its practical implementations, and its applications for brain research. Copyright © 2016 John Wiley & Sons, Ltd.
Childhood maltreatment and migraine (part III). Association with comorbid pain conditions.

OBJECTIVE
To evaluate in a headache clinic population the relationship of childhood maltreatment on the prevalence of pain conditions comorbid with migraine.


BACKGROUND
Childhood maltreatment is highly prevalent and has been frequently associated with recurrent headache. The relationship of maltreatment and pain has, however, been a subject of some debate.


METHODS
Cross-sectional data on self-reported physician-diagnosed pain conditions were electronically collected from persons with migraine (diagnosed according to International Classification of Headache Disorders-2), seeking treatment in headache clinics at 11 centers across the US and Canada. These included irritable bowel syndrome (IBS), chronic fatigue syndrome (CFS), fibromyalgia (FM), interstitial cystitis (IC), arthritis, endometriosis, and uterine fibroids. Other information included demographics, migraine characteristics (frequency, headache-related disability), remote and current depression (The Patient Health Questionnaire-9), and remote and current anxiety (The Beck Anxiety Inventory). Patients also completed the Childhood Trauma Questionnaire regarding sexual, emotional, and physical abuse, and emotional and physical neglect under the age of 18 years old. Statistical analyses accounted for the survey design and appropriate procedures in SAS such as surveymeans, surveyfreq, and surveylogistic were applied to the weighted data.


RESULTS
A total of 1348 migraineurs (88% women) were included in this study (mean age 41 years). Based on physician diagnosis or validated criteria, 31% had IBS, 16% had CFS, and 10% had FM. Diagnosis of IC was reported by 6.5%, arthritis by 25%, and in women, endometriosis was reported by 15% and uterine fibroids by 14%. At least 1 comorbid pain condition was reported by 61%, 2 conditions by 18%, and 3 or more by 13%. Childhood maltreatment was reported by 58% of the patients. Emotional abuse was associated with increased prevalence of IBS, CFS, arthritis, and physical neglect with arthritis. In women, physical abuse was associated with endometriosis and physical neglect with uterine fibroids. Emotional abuse, and physical abuse and neglect (P < .0001 for all) were also associated with increased total number of comorbid conditions. In ordinal logistic regression models, adjusted for sociodemographics and current depression (prevalence 28%) and anxiety (prevalence 56%), emotional abuse (odds ratios [OR] = 1.69, 95% confidence intervals [CI]: 1.224-2.33) and physical neglect (OR = 1.73, 95% CI: 1.22-2.46) were independently associated with an increased number of pain conditions. The cohort of women, similarly, had associations of emotional abuse (OR = 1.94, 95% CI: 1.40-2.72) and physical neglect (OR = 1.90, 95% CI: 1.34-2.68) with an increased number of pain comorbidities.


CONCLUSION
The association of childhood maltreatment and pain was stronger in those reporting multiple pain conditions and multiple maltreatment types. This finding suggests that in migraineurs childhood maltreatment may be a risk factor for development of comorbid pain disorders.
A Fast Distance-Based Algorithm to Detect Outliers

A fast distance-based algorithm for outlier detection will be proposed. It was found that the proposed algorithm reduced the number of distance calculations compared to the nestedloop algorithm. Test results were performed on different well-known data sets. The results showed that the proposed algorithm gave a reasonable amount of CPU time saving.
War and mortality in Kosovo, 1998–99: an epidemiological testimony

BACKGROUND
The total number, rates, and causes of mortality in Kosovo during the last war remain unclear despite intense international attention. Understanding mortality that results from modern warfare, in which 90% of casualties are civilian, and identifying vulnerable civilian groups, are of critical public-health importance.


METHODS
In September 1999 we conducted a two-stage cluster survey among the Kosovar Albanian population in Kosovo. We collected retrospective mortality data, including cause of death, for the period of the conflict.


FINDINGS
The survey included 1197 households comprising 8605 people. From February, 1998, through June, 1999, 67 (64%) of 105 deaths in the sample population were attributed to war-related trauma, corresponding to 12,000 (95% CI 5500-18,300) deaths in the total population. The crude mortality rate increased 2.3 times from the pre-conflict level to 0.72 per 1000 a month. Mortality rates peaked in April 1999 at 3.25 per 1000 a month, coinciding with an intensification of the Serbian campaign of "ethnic cleansing". Men of military age (15-49 years) and men 50 years and older had the highest age-specific mortality rates from war-related trauma. However, the latter group were more than three times as likely to die of war-related trauma than were men of military age (relative risk 3.2).


INTERPRETATION
Raising awareness among the international humanitarian community of the increased risk of mortality from war-related trauma among men of 50 years and older in some settings is an urgent priority. Establishing evacuation programmes to assist older people to find refuge may prevent loss of life. Such mortality data could be used as evidence that governments and military groups have violated international standards of conduct during warfare.
The experience of labor, maternal perception of the infant, and the mother’s postpartum mood in a low-risk community cohort

Postpartum negative mood interferes with maternal–infant bonding and carries long-term negative consequences for infant growth. We examined the effects of birth-related risks on mother’s postpartum anxiety and depression. A community cohort of 1,844 low-risk women who delivered a singleton term baby completed measures assessing delivery, emotions during labor, attitudes toward pregnancy and infant, mood regulation, and postpartum anxiety and depression. Under conditions of low risk, 20.5% of parturient women reported high levels of depressive symptoms. Following Cesarean Section Delivery (CSD), 23% reported high depressive symptoms, compared to 19% following Vaginal Delivery (VGD), and 21% after Assisted Vaginal Delivery (AVGD). State anxiety was highest in CSD and lowest in VGD. Mothers undergoing CSD experienced labor as most negative, reported highest somatic symptoms during the last trimester, and were least efficient in regulating negative mood. Postpartum depression was independently associated with higher maternal age, CSD, labor pain, lower negative and higher positive emotions during labor, inefficient mood regulation, somatic symptoms, and more negative and less positive perception of fetus during last trimester. Results demonstrate that elevated depressive symptoms are prevalent in the postpartum even under optimal socioeconomic and health conditions and increase following CSD. Interventions to increase positive infant-related perceptions and emotions may be especially important for promoting bond formation following CSD.
100-million-voxel volumetric display

for Defense Applications (of the SPIE's 16th Annual International Symposium on Aerospace/Defense Sensing, Simulation, and Controls) and is made available as an electronic preprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. Modified April 2002.
Subjectivity in object-oriented systems: workshop summary

Subjectivity in object-oriented systems is a new research area. At this, the first workshop in this area, there was much discussion of fundamental concepts and issues, as well as of perceived needs for subjectivity and models for realizing it. The discussion is summarized here, and a list of issues that were identified during the workshop is presented.
On the Analysis of Fingertip Photoplethysmogram Signals

Photoplethysmography (PPG) is used to estimate the skin blood flow using infrared light. Researchers from different domains of science have become increasingly interested in PPG because of its advantages as non-invasive, inexpensive, and convenient diagnostic tool. Traditionally, it measures the oxygen saturation, blood pressure, cardiac output, and for assessing autonomic functions. Moreover, PPG is a promising technique for early screening of various atherosclerotic pathologies and could be helpful for regular GP-assessment but a full understanding of the diagnostic value of the different features is still lacking. Recent studies emphasise the potential information embedded in the PPG waveform signal and it deserves further attention for its possible applications beyond pulse oximetry and heart-rate calculation. Therefore, this overview discusses different types of artifact added to PPG signal, characteristic features of PPG waveform, and existing indexes to evaluate for diagnoses.
Use of a 1.0 Tesla open scanner for evaluation of pediatric and congenital heart disease: a retrospective cohort study

BACKGROUND
Open cardiovascular magnetic resonance (CMR) scanners offer the potential for imaging patients with claustrophobia or large body size, but at a lower 1.0 Tesla magnetic field. This study aimed to evaluate the efficacy of open CMR for evaluation of pediatric and congenital heart disease.


METHODS
This retrospective, cross-sectional study included all patients ≤18 years old or with congenital heart disease who underwent CMR on an open 1.0 Tesla scanner at two centers from 2012-2014. Indications for CMR and clinical questions were extracted from the medical record. Studies were qualitatively graded for image quality and diagnostic utility. In a subset of 25 patients, signal-to-noise (SNR) and contrast-to-noise (CNR) ratios were compared to size- and diagnosis-matched patients with CMR on a 1.5 Tesla scanner.


RESULTS
A total of 65 patients (median 17.3 years old, 60% male) were included. Congenital heart disease was present in 32 (50%), with tetralogy of Fallot and bicuspid aortic valve the most common diagnoses. Open CMR was used due to scheduling/equipment issues in 51 (80%), claustrophobia in 7 (11%), and patient size in 3 (5%); 4 patients with claustrophobia had failed CMR on a different scanner, but completed the study on open CMR without sedation. All patients had good or excellent image quality on black blood, phase contrast, magnetic resonance angiography, and late gadolinium enhancement imaging. There was below average image quality in 3/63 (5%) patients with cine images, and 4/15 (27%) patients with coronary artery imaging. SNR and CNR were decreased in cine and magnetic resonance angiography images compared to 1.5 Tesla. The clinical question was answered adequately in all but 2 patients; 1 patient with a Fontan had artifact from an embolization coil limiting RV volume analysis, and in 1 patient the right coronary artery origin was not well seen.


CONCLUSIONS
Open 1.0 Tesla scanners can effectively evaluate pediatric and congenital heart disease, including patients with claustrophobia and larger body size. Despite minor artifacts and differences in SNR and CNR, the majority of clinical questions can be answered adequately, with some limitations with coronary artery imaging. Further evaluation is necessary to optimize protocols and image quality.
The duval triangle for load tap changers, non-mineral oils and low temperature faults in transformers

New versions of the Duval triangle for equipment filled with mineral oil are proposed for load tap changers of the oil type, equipment filled with non- mineral oils, and for low-temperature faults where stray gassing of oils may interfere with diagnostics.
Impact of early intervention on psychopathology, crime, and well-being at age 25.

OBJECTIVE
This randomized controlled trial tested the efficacy of early intervention to prevent adult psychopathology and improve well-being in early-starting conduct-problem children.


METHOD
Kindergarteners (N=9,594) in three cohorts (1991-1993) at 55 schools in four communities were screened for conduct problems, yielding 979 early starters. A total of 891 (91%) consented (51% African American, 47% European American; 69% boys). Children were randomly assigned by school cluster to a 10-year intervention or control. The intervention goal was to develop social competencies in children that would carry them throughout life, through social skills training, parent behavior-management training with home visiting, peer coaching, reading tutoring, and classroom social-emotional curricula. Manualization and supervision ensured program fidelity. Ninety-eight percent participated during grade 1, and 80% continued through grade 10. At age 25, arrest records were reviewed (N=817, 92%), and condition-blinded adults psychiatrically interviewed participants (N=702; 81% of living participants) and a peer (N=535) knowledgeable about the participant.


RESULTS
Intent-to-treat logistic regression analyses indicated that 69% of participants in the control arm displayed at least one externalizing, internalizing, or substance abuse psychiatric problem (based on self- or peer interview) at age 25, in contrast with 59% of those assigned to intervention (odds ratio=0.59, CI=0.43-0.81; number needed to treat=8). This pattern also held for self-interviews, peer interviews, scores using an "and" rule for self- and peer reports, and separate tests for externalizing problems, internalizing problems, and substance abuse problems, as well as for each of three cohorts, four sites, male participants, female participants, African Americans, European Americans, moderate-risk, and high-risk subgroups. Intervention participants also received lower severity-weighted violent (standardized estimate=-0.37) and drug (standardized estimate=-0.43) crime conviction scores, lower risky sexual behavior scores (standardized estimate=-0.24), and higher well-being scores (standardized estimate=0.19).


CONCLUSIONS
This study provides evidence for the efficacy of early intervention in preventing adult psychopathology among high-risk early-starting conduct-problem children.
Impact of early parenteral nutrition on muscle and adipose tissue compartments during critical illness

OBJECTIVE
The goal of enhanced nutrition in critically ill patients is to improve outcome by reducing lean tissue wasting. However, such effect has not been proven. This study aimed to assess the effect of early administration of parenteral nutrition on muscle volume and composition by repeated quantitative CT.


DESIGN
A preplanned substudy of a randomized controlled trial (Early Parenteral Nutrition Completing Enteral Nutrition in Adult Critically Ill Patients [EPaNIC]), which compared early initiation of parenteral nutrition when enteral nutrition was insufficient (early parenteral nutrition) with tolerating a pronounced nutritional deficit for 1 week in ICU (late parenteral nutrition). Late parenteral nutrition prevented infections and accelerated recovery.


SETTING
University hospital.


PATIENTS
Fifteen EPaNIC study neurosurgical patients requiring prescheduled repeated follow-up CT scans and six healthy volunteers matched for age, gender, and body mass index.


INTERVENTION
Repeated abdominal and femoral quantitative CT images were obtained in a standardized manner on median ICU day 2 (interquartile range, 2-3) and day 9 (interquartile range, 8-10). Intramuscular, subcutaneous, and visceral fat compartments were delineated manually. Muscle and adipose tissue volume and composition were quantified using standard Hounsfield Unit ranges.


MEASUREMENTS AND MAIN RESULTS
Critical illness evoked substantial loss of femoral muscle volume in 1 week's time, irrespective of the nutritional regimen. Early parenteral nutrition reduced the quality of the muscle tissue, as reflected by the attenuation, revealing increased intramuscular water/lipid content. Early parenteral nutrition also increased the volume of adipose tissue islets within the femoral muscle compartment. These changes in skeletal muscle quality correlated with caloric intake. In the abdominal muscle compartments, changes were similar, albeit smaller. Femoral and abdominal subcutaneous adipose tissue compartments were unaffected by disease and nutritional strategy.


CONCLUSIONS
Early parenteral nutrition did not prevent the pronounced wasting of skeletal muscle observed over the first week of critical illness. Furthermore, early parenteral nutrition increased the amount of adipose tissue within the muscle compartments.
The Relational Grid Monitoring Architecture: Mediating Information about the Grid

We have developed and implemented the Relational Grid Monitoring Architecture (R-GMA) as part of the DataGrid project, to provide a flexible information and monitoring service for use by other middleware components and applications. R-GMA presents users with a virtual database and mediates queries posed at this database: users pose queries against a global schema and R-GMA takes responsibility for locating relevant sources and returning an answer. R-GMA’s architecture and mechanisms are general and can be used wherever there is a need for publishing and querying information in a distributed environment. We discuss the requirements, design and implementation of R-GMA as deployed on the DataGrid testbed. We also describe some of the ways in which R-GMA is being used.