LLukas22/scidocs huggingface dataset:
Analysis of Electric DC Drive Using Matlab Simulink and SimPower Systems

In this paper model for analysis electric DC drive made in Matlab Simulink and Matlab SimPower Systems is given. Basic mathematical formulation which describes DC motor is given. Existing laboratory motor is described. Simulation model of DC motor drive and model of discontinuous load is made. Comparison of model made in Matlab Simulink and existing model in SimPower Systems is given. Essential parameters for starting simulation of used DC motor drive is given. Dynamical characteristics of DC motor drive as results of both simulation are shown. Practical use of simulation model is proposed. Keywords— analysis, DC drive, Matlab, SimPower Systems, model, simulation.
Technology acceptance model (TAM) and social media usage: an empirical study on Facebook

Purpose – Given the widespread popularity of social media, such as Twitter, Facebook, Googleþ , and LinkedIn, theorizing and understanding the user attitude and usage behavior of social media site is fundamental in developing future understandings and deployment of these new technologies. One approach to such studies on drivers of social media usage behavior would be to revisit the technology acceptance model (TAM). The purpose of this paper is to discuss these issues. Design/methodology/approach – Decades of extensive research have focussed on validating the TAM, proposed by Davis (1986), for various types of information systems and communication technologies. TAM forecasts individual adoption and voluntary use of technology. This study examines individual adoption behavior of the most popular social networking site Facebook. The influences on the intention of using social networking based on individual’s perceived ease of use (EU), the user’s critical mass (CM), social networking site capability (CP), perceived playfulness (PP), trustworthiness (TW), and perceived usefulness (PU) is empirically examined with a primary data set of 398 users of Facebook gathered from a web-based questionnaire survey. Findings – The results demonstrate that the revised social media TAM model proposed in this study supports all the hypotheses of social media usage behavior. The results of this study provide evidence for the importance of additional key variables to TAM in considering user engagement on social media sites and other social-media-related business strategies. Originality/value – Based on our review of existing scientific literature on social media, few empirical studies have been conducted to scientifically evaluate and explain the usage behavior of social media using Facebook. A validated instrument of usage behavior of social media can provide usability experts and practitioners with a validated tool to assess social media acceptance and usage behavior. This can help us gain a better understanding of “who is and who is not using these sites, why and for what purposes” (Boyd and Ellison, 2007).
Effectiveness of paramedic practitioners in attending 999 calls from elderly people in the community: cluster randomised controlled trial.

OBJECTIVE
To evaluate the benefits of paramedic practitioners assessing and, when possible, treating older people in the community after minor injury or illness. Paramedic practitioners have been trained with extended skills to assess, treat, and discharge older patients with minor acute conditions in the community.


DESIGN
Cluster randomised controlled trial involving 56 clusters. Weeks were randomised to the paramedic practitioner service being active (intervention) or inactive (control) when the standard 999 service was available.


SETTING
A large urban area in England.


PARTICIPANTS
3018 patients aged over 60 who called the emergency services (n=1549 intervention, n=1469 control).


MAIN OUTCOME MEASURES
Emergency department attendance or hospital admission between 0 and 28 days; interval from time of call to time of discharge; patients' satisfaction with the service received.


RESULTS
Overall, patients in the intervention group were less likely to attend an emergency department (relative risk 0.72, 95% confidence interval 0.68 to 0.75) or require hospital admission within 28 days (0.87, 0.81 to 0.94) and experienced a shorter total episode time (235 v 278 minutes, 95% confidence interval for difference -60 minutes to -25 minutes). Patients in the intervention group were more likely to report being highly satisfied with their healthcare episode (relative risk 1.16, 1.09 to 1.23). There was no significant difference in 28 day mortality (0.87, 0.63 to 1.21).


CONCLUSIONS
Paramedics with extended skills can provide a clinically effective alternative to standard ambulance transfer and treatment in an emergency department for elderly patients with acute minor conditions.


TRIAL REGISTRATION
ISRCTN27796329 [controlled-trials.com].
Antiretroviral regimens in pregnancy and breast-feeding in Botswana.

BACKGROUND
The most effective highly active antiretroviral therapy (HAART) to prevent mother-to-child transmission of human immunodeficiency virus type 1 (HIV-1) in pregnancy and its efficacy during breast-feeding are unknown.


METHODS
We randomly assigned 560 HIV-1-infected pregnant women (CD4+ count, > or = 200 cells per cubic millimeter) to receive coformulated abacavir, zidovudine, and lamivudine (the nucleoside reverse-transcriptase inhibitor [NRTI] group) or lopinavir-ritonavir plus zidovudine-lamivudine (the protease-inhibitor group) from 26 to 34 weeks' gestation through planned weaning by 6 months post partum. A total of 170 women with CD4+ counts of less than 200 cells per cubic millimeter received nevirapine plus zidovudine-lamivudine (the observational group). Infants received single-dose nevirapine and 4 weeks of zidovudine.


RESULTS
The rate of virologic suppression to less than 400 copies per milliliter was high and did not differ significantly among the three groups at delivery (96% in the NRTI group, 93% in the protease-inhibitor group, and 94% in the observational group) or throughout the breast-feeding period (92% in the NRTI group, 93% in the protease-inhibitor group, and 95% in the observational group). By 6 months of age, 8 of 709 live-born infants (1.1%) were infected (95% confidence interval [CI], 0.5 to 2.2): 6 were infected in utero (4 in the NRTI group, 1 in the protease-inhibitor group, and 1 in the observational group), and 2 were infected during the breast-feeding period (in the NRTI group). Treatment-limiting adverse events occurred in 2% of women in the NRTI group, 2% of women in the protease-inhibitor group, and 11% of women in the observational group.


CONCLUSIONS
All regimens of HAART from pregnancy through 6 months post partum resulted in high rates of virologic suppression, with an overall rate of mother-to-child transmission of 1.1%. (ClinicalTrials.gov number, NCT00270296.)
Rotation-invariant and scale-invariant Gabor features for texture image retrieval

Conventional Gabor representation and its extracted features often yield a fairly poor performance in retrieving the rotated and scaled versions of the texture image under query. To address this issue, existing methods exploit multiple stages of transformations for making rotation and/or scaling being invariant at the expense of high computational complexity and degraded retrieval performance. The latter is mainly due to the lost of image details after multiple transformations. In this paper, a rotation-invariant and a scale-invariant Gabor representations are proposed, where each representation only requires few summations on the conventional Gabor filter impulse responses. The optimum setting of the orientation parameter and scale parameter is experimentally determined over the Brodatz and MPEG-7 texture databases. Features are then extracted from these new representations for conducting rotation-invariant or scale-invariant texture image retrieval. Since the dimension of the new feature space is much reduced, this leads to a much smaller metadata storage space and faster on-line computation on the similarity measurement. Simulation results clearly show that our proposed invariant Gabor representations and their extracted invariant features significantly outperform the conventional Gabor representation approach for rotation-invariant and scale-invariant texture image retrieval. 2007 Elsevier B.V. All rights reserved.
Factors Associated with Awareness, Attitudes and Practices Regarding Common Eye Diseases in the General Population in a Rural District in Bangladesh: The Bangladesh Population-based Diabetes and Eye Study (BPDES)

BACKGROUND
To assess the awareness, attitudes, and practices associated with common eye diseases and eye care utilization in a rural district of Bangladesh.


METHODS
Data were collected using a multilevel cluster random sampling technique from 3104 adults aged ≥30 years from the Banshgram union with a questionnaire assessing the awareness, attitudes and practice about diabetes and common eye diseases, educational attainment, socio-economic status, and medical history.


RESULTS
Participants were aged between 30 and 89 years with a mean (SD) age of 51 (12) years and 65% were female. The majority of participants had heard of cataracts (90%), trachoma (86%) and Pterygium (84%), yet only 4% had heard of diabetic retinopathy (DR), 7% of glaucoma and 8% of Age-related macular degeneration (AMD). However, 58% of participants did not know vision loss could be prevented. Factors associated with lower awareness regarding common eye diseases were increasing age, lack of formal schooling, and lower socio-economic status. A lower proportion (57%) of people with no schooling compared to those who had attained at least secondary school certificate education (72%) reported that they knew that vision loss could be prevented (p<0.001). Overall 51% of people had heard of at least six (67%) out of nine items relating to awareness of common eye diseases. This included 41% of participants aged 65 years or older compared to 61% of those aged 30-35 years (p<0.001). Only 4% had an eye check at least once a year and higher education and better SES were associated with higher frequency of eye checks.


CONCLUSIONS
In rural Bangladesh awareness of cataract, trachoma and pterygium was good but limited in relation to the potentially blinding conditions of glaucoma, DR, and AMD. The results show a large gap between public awareness and treatment practices about common eye diseases. Public health promotion should be designed to address these knowledge gaps.
Pigmented ameloblastic fibrodentinoma: a novel melanin-pigmented intraosseous odontogenic lesion

This paper reports about an ameloblastic fibrodentinoma with macroscopically visible pigmentation, resulting in the clinical appearance of a melanotic lesion in a 21-year-old Japanese male. In addition to the characteristic histopathologic features of ameloblastic fibrodentinoma, various-formed and -sized cells, which were considered to be melanophages containing numerous aggregates of melanin pigment in their cytoplasm, were densely distributed throughout the mesenchymal component. In addition, melanin pigment was deposited in dentin. Some of the pigmented cells showed dendritic form and were regarded as melanocytes. Furthermore, pigmented cells were frequently distributed in the epithelial component, and melanin pigment was seen in some epithelial cells. Perusal of the English language literature revealed 30 cases of pigmented odontogenic tumors: 18 were calcifying odontogenic cysts, three were ameloblastic fibro-odontomas, three were adenomatoid odontogenic tumors, two were odontomas, one was an ameloblastic fibroma and one was an odontogenic fibroma. However, all of these reported lesions did not show macroscopically visible pigmentation. The possible histogenesis of melanocytes in the odontogenic lesions is discussed, although no firm conclusion could be drawn.
The Design of a Heavy-load Palletizing Robotic Structure for Coating Handling

Heavy load palletizing robot in solving labor shortage, improve labor productivity, reduce production cost and the labor intensity of workers, improve the production environment, etc. It is of great significance. This article expounds the heavy load of palletizing robot working principle, structure and main structure design; using the finite element analysis software Solidworks Simulation for robot arm structure of dynamic and static mechanics analysis; Palletizing robot motion analysis. A large range of prototype experiments show that the robot movement, carrying capacity is strong, fast and can meet the design requirements. Introduction Stacking technique is a new technology of modern logistics automation, palletizing robot, turned a piece of a product or material stacking according to certain rules into the crib, easy to handle storage, to lift the heavy labor, improve labor productivity and improve the production environment is of great significance., along with the development of science and technology progress and palletizing robot application for palletizing robot not only has rapid accurate handling material, also calls for palletizing robot with overload, high efficiency, high reliability and low cost etc. The three trees paint company is one of the enterprises, the local maximum paint bucket weight 200 kg, the production line has been using artificial handling the bucket, the labor intensity of workers, environments, and there is a big security hidden danger. The three trees paint company designed and developed a kind of used for coatings, carrying the heavy load of palletizing robot, implements the enterprise production process of the bucket handling automation. In this paper, the structure composition and the main structure design. Fig. 1 The overall structure of palletizing robot. International Symposium on Mechanical Engineering and Material Science (ISMEMS 2016) Copyright © 2016, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Engineering Research, volume 93
Service composition for IP smart object using realtime Web protocols: Concept and research challenges

The Internet of Things (IoT) refers to a world-wide network of interconnected physical things using standardized communication protocols. Recent development of Internet Protocol (IP) stacks for resource-constrained devices unveils a possibility for the future IoT based on the stable and scalable IP technology much like today’s Internet of computers. One important question remains: how can data and events (denoted as services) introduced by a variety of IP networked things be exchanged and aggregated efficiently in various application domains. Because the true value of IoT lies in the interaction of several services from physical things, answers to this question are essential to support a rapid creation of new IoT smart and ubiquitous applications. The problem is known as service composition. This article explains the practicability of the future full-IP IoT with realtime Web protocols to formally state the problem of service composition for IP smart objects, provides literature review, and discusses its research challenges.
Intra-rater agreement of the anorectal exam and classification of injury severity in children with spinal cord injury

Study design:Intra-rater reliability study, cross-sectional design.Objectives:To report on the intra-rater agreement of the anorectal examinations and classification of injury severity in children with spinal cord injury (SCI).Setting:Two, non-profit children's hospitals specializing in pediatric SCI.Methods:180 subjects had at least two trials of the anorectal examinations as defined by the International Standards for Neurological Classification of Spinal Cord Injury. Intraclass correlation coefficients (ICC) and 95% confidence intervals (CI) were used to evaluate the agreement. ICC>0.90=high agreement; ICC between 0.75–0.89=moderate agreement; ICC<0.75=poor agreement.Results:When evaluated for the entire sample, agreement was moderate-high for anal sensation and contraction and injury classification. When evaluated as a function of age at examination and type of injury, agreement for anal sensation was poor for subjects with tetraplegia in the 12–15-year age group (ICC=0.56) and 16–21-year age group (ICC=0.70) and for subjects with paraplegia in the 6–11-year age group (ICC=0.69). Agreement for anal contraction was moderate for subjects with tetraplegia in the 16–21-year age group (ICC=0.81) and subjects with paraplegia in the 12–15-year age group (ICC=0.78) and poor for subjects with paraplegia in the 6–11-year age group (ICC=0.67). Agreement for injury classification was poor for subjects with tetraplegia in the 12–15-year group (ICC=0.56) and 16–21-year group (ICC=0.74) and paraplegia in the 6–11-year group (ICC=0.11) and 12–15-year group (ICC=0.63). Anorectal responses had high agreement in subjects with tetraplegia in the 6–11-year group and moderate to high agreement in subjects with paraplegia in the 16–21-year group.Conclusion:The data do not fully support the use of anorectal examination in children. Further work is warranted to establish the validity of anorectal examination.
Comparative effects of variations in duodenal glucose load on glycemic, insulinemic, and incretin responses in healthy young and older subjects.

CONTEXT
Aging is associated with deteriorating glucose tolerance. Studies assessing glucose tolerance and subsequent insulin and incretin hormone release often fail to take into account the rate of gastric emptying when evaluating these responses.


OBJECTIVE
Our objective was to determine the comparative effects of variations in the small intestinal glucose load on the glycemic, insulinemic, and incretin responses in healthy young and older subjects.


MATERIALS AND METHODS
Twelve healthy young (six males, six females; age 22.2±2.3 yr) and 12 older (six males, six females; age 68.7±1.0 yr) subjects had measurements of blood glucose, serum insulin and plasma incretin hormones [glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP)] and calculations of insulin resistance (homeostatic model assessment) and β-cell function corrected for insulin sensitivity, before and during intraduodenal infusions of glucose at 1, 2, or 3 kcal/min or saline for 60 minutes. The study was double-blinded and randomized, and performed in the Discipline of Medicine at the Royal Adelaide Hospital.


RESULTS
At baseline, blood glucose and serum insulin were slightly higher in the older subjects (P<0.001), whereas GLP-1 and GIP were comparable between groups. In both groups, the glycemic, insulinemic, and GLP-1 responses were dependent on the duodenal glucose load in a nonlinear fashion (P<0.001). The glycemic response was greater (P<0.001) in the older subjects, whereas GLP-1 and GIP responses were comparable between groups. The older subjects were more insulin resistant (P<0.001) and had impaired β-cell function, particularly at higher glucose loads (P<0.05).


CONCLUSION
When glucose is infused into the small intestine at equal rates in healthy young and older subjects, GLP-1 and GIP responses are comparable, indicating that impaired incretin secretion does not account for age-related glucose intolerance.
Recommending scientific articles using citeulike

We describe the use of the social reference management website CiteULike for recommending scientific articles to users, based on their reference library. We test three different collaborative filtering algorithms, and find that user-based filtering performs best. A temporal analysis of the data indexed by CiteULike shows that it takes about two years for the cold-start problem to disappear and recommendation performance to improve.
Markers of inflammation and coagulation may be modulated by enteral feeding strategy.

BACKGROUND
Although enteral nutrition (EN) is provided to most mechanically ventilated patients, the effect of specific feeding strategies on circulating markers of coagulation and inflammation is unknown.


METHODS
Markers of inflammation (tumor necrosis factor [TNF]-α, interleukin [IL]-1β, interferon [IFN]-γ, IL-6, IL-8, IL-10, IL-12) and coagulation (tissue factor [TF], plasminogen activator inhibitor-1) were measured at baseline (n = 185) and 6 days (n = 103) in mechanically ventilated intensive care unit patients enrolled in a randomized controlled study of trophic vs full-energy feeds to test the hypothesis that trophic enteral feeds would be associated with decreases in markers of inflammation and coagulation compared to full-energy feeds.


RESULTS
There were no differences in any of the biomarkers measured at day 6 between patients who were randomized to receive trophic feeds compared to full-energy feeds. However, TF levels decreased modestly in patients from baseline to day 6 in the trophic feeding group (343.3 vs 247.8 pg/mL, P = .061) but increased slightly in the full-calorie group (314.3 vs 331.8 pg/mL). Lower levels of TF at day 6 were associated with a lower mortality, and patients who died had increasing TF levels between days 0 and 6 (median increase of 39.7) compared to decreasing TF levels in patients who lived (median decrease of 95.0, P = .033).


CONCLUSIONS
EN strategy in critically ill patients with acute respiratory failure does not significantly modify inflammation and coagulation by day 6, but trophic feeds may have some modest effects in attenuating inflammation and coagulation.
The surface of vulnerability : An analytical framework for examining environmental change

This paper introduces an analytical framework for evaluating the vulnerability of people and places to environmental and social forces. The framework represents the relative vulnerability of a variable of concern (e.g. such as agricultural yield) to a set of disturbing forces (e.g. climate change, market fluctuations) by a position on a three-dimensional analytical surface, where vulnerability is defined as a function of sensitivity, exposure, and the state relative to a threshold of damage. The surface is presented as a tool to help identify relative vulnerability in order to prioritize actions and assess the vulnerability implications of management and policy decisions. r 2005 Elsevier Ltd. All rights reserved.