nils-herrmann/clean_scirepeval huggingface dataset:
High Performance Room Temperature Methane Gas Sensor Based on Lead Sulfide/Reduced Graphene Oxide Nanocomposite
Venue: IEEE Sensors Journal
Year: 2020

Graphene is a monolayer of carbon atoms which shows many exceptional electronic and sensing properties, making it a very promising material for sensing applications. In this paper, lead sulfide nanocrystals (PbS NCs)/reduced graphene oxide (rGO) with different weight ratios were successfully synthesized by a facile method for methane sensing applications. Crystal structure and morphology of synthesized material were characterized by means of X ray diffraction (XRD) field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) Characterization data demonstrate that rGO nanosheets provide a favorable surface for PbS NCs nucleation. rGO as a high mobility element affects on electrical conductivity, sensor response, and response time of the sensors. Electrical conductivity and methane sensing characteristics were investigated as a function of rGO concentration (0, 1, 2, 3.5, and 5 wt% The synthesized 3.5 wt% rGO sample exhibited the best methane sensing performance at room temperature. The proposed sensor has shown a good response (more than 40% at the lower explosive limit of methane.
The Capacity of Private Information Retrieval With Private Side Information Under Storage Constraints
Venue: IEEE Transactions on Information Theory
Year: 2020

We consider the problem of private information retrieval (PIR) of a single message out of <inline formula> <tex math notation="LaTeX"$K$ /tex math>/inline formula> messages from <inline formula> <tex math notation="LaTeX"$N$ /tex math>/inline formula> replicated and non colluding databases where a cache enabled user (retriever) of cache size <inline formula> <tex math notation="LaTeX"$S$ /tex math>/inline formula> possesses side information in the form of uncoded portions of the messages where the message identities are unknown to the databases. The identities of these side information messages need to be kept private from the databases, i.e. we consider PIR with private side information (PSI) We characterize the optimal normalized download cost for this PIR PSI problem under the storage constraint <inline formula> <tex math notation="LaTeX"$S$ /tex math>/inline formula> as <inline formula> <tex math notation="LaTeX"$D^=1+\frac {1}{N}\frac {1}{N^{2} \dots \frac {1}{N^{K 1 M} \frac {1 r_{M}{N^{K M}\frac {1 r_{M 1}{N^{K M+1} \dots \frac {1 r_{1}{N^{K 1} /tex math>/inline formula> where <inline formula> <tex math notation="LaTeX"$M$ /tex math>/inline formula> is the number of side information messages and <inline formula> <tex math notation="LaTeX"$r_{i} /tex math>/inline formula> is the portion of the <inline formula> <tex math notation="LaTeX"$i$ /tex math>/inline formula>th side information message that is cached with <inline formula> <tex math notation="LaTeX"\sum _{i=1}{M} r_{i}=S$ /tex math>/inline formula> Based on this capacity result, we prove two facts: First, for a fixed memory size <inline formula> <tex math notation="LaTeX"$S$ /tex math>/inline formula> and a fixed number of accessible messages <inline formula> <tex math notation="LaTeX"$M$ /tex math>/inline formula> uniform caching achieves the lowest normalized download cost, i.e. <inline formula> <tex math notation="LaTeX"$r_{i}\frac {S}{M} /tex math>/inline formula> for <inline formula> <tex math notation="LaTeX"$i=1, \dots M$ /tex math>/inline formula> is optimum. Second, for a fixed memory size <inline formula> <tex math notation="LaTeX"$S$ /tex math>/inline formula> among all possible <inline formula> <tex math notation="LaTeX"$K \left \lceil{ {S} \right \rceil +1$ /tex math>/inline formula> uniform caching schemes, the uniform caching scheme which caches <inline formula> <tex math notation="LaTeX"$M=K$ /tex math>/inline formula> messages achieves the lowest normalized download cost.
The Neglect of Racism as an Ethical Issue in Health Care
Venue: Journal of Immigrant and Minority Health
Year: 2008

Race and racism has been increasingly implicated in known disparities in the health and health care of racial, ethnic and cultural minorities groups. Despite the obvious ethical implications of this observation, racism as an ethical issue per se has been relatively neglected in health care ethics discourse. In this paper consideration is given to addressing the following questions: What is it about racism and racial disparities in health and health care that these command our special moral scrutiny? Why has racism per se tended to be poorly addressed as an ethical issue in health care ethics discourse? And why, if at all, must racism be addressed as an ethical issue in addition to its positioning as a social, political, cultural and legal issue? It is suggested that unless racism is reframed and redressed as a pre eminent ethical issue by health service providers, its otherwise preventable harmful consequences will remain difficult to identify, anticipate, prevent, manage, and remedy.
Interactive Multimedia Development in Exposition Text Learning According to Learning Media Expert in Dwitunggal Junior High School, Tanjung Morawa
Venue: Budapest International Research and Critics in Linguistics and Education (BirLE) Journal
Year: 2019

This study is aimed to develop products in the form of interactive learning multimedia in exposition teaching learning. Product development is designed using Adobe Flash CS5 Professional software. The object of this study is VII grade students of Dwitunggal Junior High School in Tanjung Morawa. The steps of developing Adobe Flash CS5 Professional multimedia for learning skills of writing the exposition text of VIII grade students of Junior High School as follows: (1) Decide, (2) Design (product design) (3) Product development, (4) Evaluate (Product test) The analysis needs to be carried out in two stages, there are: (1) literature study and (2) observation in Dwitunggal Junior High School in Tanjung Morawa. To obtain the validity of the data, it is required validation of the expert media and material. After validation is done by the two media professionals, material, and practical testing were conducted on a limited basis in 35 students of VIII grade Dwitunggal Junior High School in Tanjung Morawa. Based on the results of validations and trials on interactive multimedia products, it can be reported as follows: (1) validation of the material shows the percentage of eligibility is 86, 3% with very good category (2) media validation shows the percentage of eligibility is 86.5% with very good category (4) teachers' validity (practitioner) shows the percentage of eligibility is 90, 5 with very good category. The acquisition of individual trial results is stated as "very good" with an average percentage of 83.7% The acquisition of small group trial results is stated as "very good" with an average percentage of 85.5% and the acquisition of limited field trial results is stated as "very good" with an average percentage of 87.3% The effectiveness of interactive multimedia products in learning of writing the exposition text seen from student learning outcomes in writing exposition text after using learning media that have been developed are in "very good" category with an average value of 88.17 and the average value before using text learning media exposition of 67.88 which is in the category of "sufficient" This proves that student learning outcomes are higher after using interactive multimedia in learning of writing exposition text with a value difference of 20.29.
Repression of Retroelements in Drosophila Germline via piRNA Pathway by the Tudor Domain Protein Tejas
Venue: Current Biology
Year: 2010

The Piwi interacting RNAs (piRNAs) have been shown to safeguard the animal germline genome against deleterious retroelements  Many factors involved in the production of piRNAs localize to nuage, a unique perinuclear structure in animal germline cells [10] suggesting that nuage may function as a site for processing of germline piRNAs [1, 3 6, 11 14] Here we report a conserved yet uncharacterized component of the germline piRNA pathway, Tejas (Tej) which localizes to nuage. tej is required for the repression of some retroelements and for the production of sufficient germline piRNAs. The localization of Tej to nuage depends on vasa (vas)  and spindle E (spn E) [1, 16, 17] while it regulates the localization of Spn E, Aubergine (Aub) [3, 4, 14] Argonaute3 (Ago3)  Krimper (Krimp) [13] and Maelstrom (Mael) [18] to nuage. Aub, Vas, and Spn E physically interact with Tej through the N terminus containing the conserved tejas domain, which is necessary and sufficient for its germline function. Aub and Spn E also bind to the tudor domain at the C terminus. Our data suggest that Tej contributes to the formation of a macromolecular complex at perinuclear region and engages it in the production of germline piRNAs.
Envelope Correlation Parameter Measurements in a MIMO Antenna Array Configuration
Venue: Int. J. Commun. Netw. Syst. Sci.
Year: 2010

In a 2 x 2 MIMO antenna array system envelope correlation coefficient "r" shows the influence of different propagation paths of the RF signals that reach the antenna elements. The approximated value of this coefficient is based on a simple closed form equation and also varies from 0 to 1. Quite perfect performance for MIMO applications is achieved when this parameter approximates to zero. In this paper, we evaluate an antenna diversity MIMO system by measuring the envelope correlation coefficient. The corresponding results in our antenna array configurations show that the measured "r" has very small values and approximates to zero. This observation indicates quite perfect behavior and performance of our MIMO antenna array system.
UAV Assisted Relaying and Edge Computing: Scheduling and Trajectory Optimization
Venue: IEEE Transactions on Wireless Communications
Year: 2019

In this paper, we study an unmanned aerial vehicle (UAV) assisted mobile edge computing (MEC) architecture, in which a UAV roaming around the area may serve as a computing server to help user equipment (UEs) compute their tasks or act as a relay for further offloading their computation tasks to the access point (AP) We aim to minimize the weighted sum energy consumption of the UAV and UEs subject to the task constraints, the information causality constraints, the bandwidth allocation constraints and the UAV's trajectory constraints. The required optimization is nonconvex, and an alternating optimization algorithm is proposed to jointly optimize the computation resource scheduling, bandwidth allocation, and the UAV's trajectory in an iterative fashion. The numerical results demonstrate that significant performance gain is obtained over conventional methods. Also, the advantages of the proposed algorithm are more prominent when handling computation intensive latency critical tasks.
Polyphenols and Sesquiterpene Lactones from Artichoke Heads: Modulation of Starch Digestion, Gut Bioaccessibility, and Bioavailability following In Vitro Digestion and Large Intestine Fermentation
Venue: Antioxidants
Year: 2020

Artichoke is a relevant source of health promoting compounds such as polyphenols and sesquiterpene lactones. In this study, the bioaccessibility and gut bioavailability of artichoke constituents were evaluated by combining in vitro digestion and large intestine fermentation, metabolomics, and Caco 2 human intestinal cells model. Moreover, the ability of artichoke polyphenols to modulate the in vitro starch digestibility was also explored. An untargeted metabolomic approach based on liquid chromatography quadrupole time of flight (UHPLC/QTOF) mass spectrometry coupled with multivariate statistics was used to comprehensively screen the phytochemical composition of raw, digested, and fermented artichoke. Overall, a large abundance of phenolic acids and sesquiterpene lactones was detected, being 13.77 and 11.99 mg*g 1, respectively. After 20 h of in vitro large intestine fermentation, a decrease in polyphenols and sesquiterpene lactones content was observed. The most abundant compounds characterizing the raw material (i.e. chlorogenic acid and cynaropicrin equivalents) showed an average bioaccessibility of 1.6% The highest bioaccessibility values were recorded for flavonoids such as anthocyanin and flavone equivalents (on average, 13.6% However, the relatively high bioavailability values recorded for flavonols, phenolic acids, and sesquiterpene lactones (from 71.6% up to 82.4% demonstrated that these compounds are able to be transported through the Caco 2 monolayer. The phenolic compounds having the highest permeation rates through the Caco 2 model included low molecular weight phenolics such as tyrosol and 4 ethylcatechol; the isoflavonoids 3' O methylviolanone, equol 4' O glucuronide, and hydroxyisoflavone; together with the methyl and acetyl derivatives of glycosylated anthocyanins. Therefore, although human in vivo confirmatory trials are deemed possible, current findings provide insights into the mechanistic effects underlying artichoke polyphenols and sesquiterpenoids bioavailability following gastrointestinal and large intestine processes.
Encouraging employees to report verbal violence in primary health care in Serbia: A cross sectional study
Venue: Zdravstveno varstvo
Year: 2017

Workplace violence is a serious and multidimensional problem that adversely affects professional and personal lives of employees. The aim of this study was to assess the prevalence and characteristics of verbal violence as a part of psychological violence among employees in primary health care in Belgrade, and to identify contributing factors of verbal violence in the workplace.  In this cross sectional study, the final analysis included 1526 employees, using multi stage sampling. Data were collected using the questionnaire Workplace Violence in the Health Sector Country Case Studies Research, developed by ILO/ICN/WHO/PSI. Descriptive statistics and logistic regression analysis were used to analyse the data. The general response rate was 86.8% (1526/1757) Results It was found that 47.8% of the participants were subjected to verbal violence. The main source of verbal violence was patient/client, 55.6% of employees did not report the incident. Among those who did not report the incident, 74.9% believed that reporting violence was useless. The interaction with patients (OR, 1.45; 95% CI, 1.02 2.06) and work between 6pm and 7am (OR, 1.27; 95% CI, 1.01 1.60) were significant contributing factors of verbal violence.  The results are indicative of a high prevalence of verbal violence against employees in primary health centres, which could have undesirable consequences. Conducting a better organizational measure and encouraging employees to report workplace violence could reduce the prevalence of verbal violence.
Global monitoring report 2009 a development emergency
Year: 2009

The global financial crisis, the most severe since the great depression, is rapidly turning into a human and development crisis. The financial crisis originated in the developed world, but it has spread quickly and inexorably to the developing world, sparing no country. Increasingly it appears that this will not be a short lived crisis. The poor countries are especially vulnerable, as they lack the resources to respond with ameliorative actions. The crisis poses serious threats to their hard won gains in boosting economic growth and achieving progress toward the Millennium Development Goals (MDGs) Poor people typically are the hardest hit, and have the least cushion. For millions of them, the crisis puts at risk their very survival. At high level meetings held in 2008 to mark the MDG halfway point, world leaders expressed grave concern that the world was falling behind most of the MDGs, with the shortfalls especially serious in human development, and issued an MDG call to action to step up development efforts. The U.K. prime minister spoke of a 'global poverty emergency. These concerns were expressed before the onset of the full blown global financial crisis. If there was development emergency then, there surely is one now. The financial crisis threatens serious further setbacks and greatly increases the urgency for action.
A thermal perspective of flash sintering: The effect of AC current ramp rate on microstructure evolution
Year: 2020

In flash sintering experiments, the thermal history of the sample is key to understanding the mechanisms underlying densification rate and final properties. By combining robust temperature measurements with current ramp rate control, this study examined the effects of the thermal profile on the flash sintering of yttria stabilized zirconia, with experiments ranging from a few seconds to several hours. The final density was maximized at slower heating rates, although processes slower than a certain threshold led to grain growth. The amount of grain growth observed was comparable to a similar conventional thermal process. The bulk electrical conductivity correlated with the maximum temperature and cooling rate. The only property that exhibited behavior that could not be attributed to solely the thermal profile was the grain boundary conductivity, which was consistently higher than conventional in flash sintered samples. These results suggest that, during flash sintering, athermal electric field effects are relegated to the grain boundary.
A write friendly approach to manage namespace of Hadoop distributed file system by utilizing nonvolatile memory
Venue: The Journal of Supercomputing
Year: 2019

With the emergence of the big data era, various technologies have been proposed to cope with the exascale of data. For a considerably large volume of data, a single machine does not comprise enough resources to store the complete data. Hadoop distributed file system (HDFS) enables large datasets to be stored across the big data environment consisting of several machines. Although Hadoop has become a crucial part of the big data industry, because of its simple architecture which composed of master and slaves several problems such as scalability and performance bottleneck has been remained to solve. New storage technologies offer an opportunity to solve the problems and improve HDFS. We propose a novel management scheme for namespace metadata of HDFS by utilizing nonvolatile memory which has been mentioned as the next generation device since flash memory devices. Nonvolatile memory, which can guarantee data persistence and high performance with byte address access, alleviates Namenode bottlenecks resulting from journaling processes performed to preserve the file system's metadata. Our proposed methods show significant improvement compared with block devices such as hard disk drive, solid state drive in terms of NameNode performance.
Listening to Mozart Improves Current Mood in Adult ADHD A Randomized Controlled Pilot Study
Venue: Front. Psychol.
Year: 2019

Emotional lability is a common problem in adult patients with ADHD and is usually treated with methylphenidate. It is generally known that music can be used to improve mood in healthy adults. Therefore, this study was conducted to test the suitability of music as a possible non pharmacological measure to improve mood. Forty patients with ADHD and 44 healthy control subjects were randomly assigned to one of two experimental conditions. The first group (music group) listened to Mozart's music (KV 448) for 10 min while the second group remained in a silent room for 10 min (silence group) Subjective arousal and mood were assessed using self report questionnaires before and after each condition. We showed that music listening led to a decrease in negative mood (sadness and hopelessness) in the ADHD group as well as in healthy controls. This effect was not evident in both silence groups.
Why Does Space Feel the Way it Does? Towards a Principled Account of Spatial Experience
Venue: Entropy
Year: 2019

There must be a reason why an experience feels the way it does. A good place to begin addressing this question is spatial experience, because it may be more penetrable by introspection than other qualities of consciousness such as color or pain. Moreover, much of experience is spatial, from that of our body to the visual world, which appears as if painted on an extended canvas in front of our eyes. Because it is 'right there' we usually take space for granted and overlook its qualitative properties. However, we should realize that a great number of phenomenal distinctions and relations are required for the canvas of space to feel 'extended' Here we argue that, to be experienced as extended, the canvas of space must be composed of countless spots, here and there, small and large, and these spots must be related to each other in a characteristic manner through connection, fusion, and inclusion. Other aspects of the structure of spatial experience follow from extendedness: every spot can be experienced as enclosing a particular region, with its particular location, size, boundary, and distance from other spots. We then propose an account of the phenomenal properties of spatial experiences based on integrated information theory (IIT) The theory provides a principled approach for characterizing both the quantity and quality of experience by unfolding the cause effect structure of a physical substrate. Specifically, we show that a simple simulated substrate of units connected in a grid like manner yields a cause effect structure whose properties can account for the main properties of spatial experience. These results uphold the hypothesis that our experience of space is supported by brain areas whose units are linked by a grid like connectivity. They also predict that changes in connectivity, even in the absence of changes in activity, should lead to a warping of experienced space. To the extent that this approach provides an initial account of phenomenal space, it may also serve as a starting point for investigating other aspects of the quality of experience and their physical correspondents.
Fatigue strength assessment of load carrying cruciform joints with material mismatching in low and high cycle fatigue regions based on the effective notch concept
Year: 2012

This study examined the applicability of the effective notch concept to the low and high cycle fatigue regions for load carrying cruciform joints. Low and high cycle fatigue tests were performed on specimens with various strength matching conditions and incomplete penetration ratio. Fatigue test results revealed that the effect of strength matching becomes obvious in low cycle fatigue region, while, it was negligible in high cycle fatigue region. Different failure patterns can be observed for specimen with different strength mismatching condition in the low cycle fatigue tests. Elasto plastic finite element analyses were performed under the same conditions as the experiments. The effective notch strains were determined at the crack initiation points. A unique relationship between effective notch strain and fatigue life was obtained regardless of matching condition and incomplete penetration ratio.