nils-herrmann/clean_scirepeval huggingface dataset:
Rotating Coherent Flow Structures as a Source for Narrowband Tip Clearance Noise from Axial Fan

The sound radiation of axial fans typically increases significantly as the tip clearance is increased. In addition to the broadband tip clearance noise at the design flow rate, narrowband humps associated with tip clearance noise are also observed in the acoustic spectra measured in the free field at lower flow rate. In this study, both experimental and numerical methods are used to shed more light on the noise generation mechanism of this narrowband tip clearance noise. The successful validation of the aeroacoustic predictions from unsteady simulations with the Lattice Boltzmann Method (LBM) ensures that employing LBM data to conduct a comprehensive modal analysis for detecting rotating coherent flow structures which might be considered as noise sources. It is found that the narrowband humps are related to the tip clearance noise that is generated by an interaction of coherent flow structures being present in the tip region with the leading edge of the impeller blades. The visualization of the coherent structures is shown that they are indeed parts of the unsteady tip clearance vortex structures. They are hidden in a complex spatially and temporally inhomogeneous flow field, but can be recovered by means of appropriate filtering techniques.
Unreacted PbI2 as a Double Edged Sword for Enhancing the Performance of Perovskite Solar Cells.
Venue: Journal of the American Chemical Society

Lead halide perovskites have over the past few years attracted considerable interest as photo absorbers in PV applications with record efficiencies now reaching 22% It has recently been found that not only the composition but also the precise stoichiometry is important for the device performance. Recent reports have, for example, demonstrated small amount of PbI2 in the perovskite films to be beneficial for the overall performance of both the standard perovskite, CH3NH3PbI3, as well as for the mixed perovskites (CH3NH3)x(CH(NH2)2)(1 x)PbBryI(3 y) In this work a broad range of characterization techniques including X ray diffraction (XRD) scanning electron microscopy (SEM) transmission electron microscopy (TEM) photo electron spectroscopy (PES) transient absorption spectroscopy (TAS) UV vis, electroluminescence (EL) photoluminescence (PL) and confocal PL mapping have been used to further understand the importance of remnant PbI2 in perovskite solar cells. Our best devices were over 18% efficient, and had in line with previous results a small amount of excess PbI2. For the PbI2 deficient samples, the photocurrent dropped, which could be attributed to accumulation of organic species at the grain boundaries, low charge carrier mobility, and decreased electron injection into the TiO2. The PbI2 deficient compositions did, however, also have advantages. The record Voc was as high as 1.20 V and was found in PbI2 deficient samples. This was correlated with high crystal quality, longer charge carrier lifetimes, and high PL yields and was rationalized as a consequence of the dynamics of the perovskite formation. We further found the ion migration to be obstructed in the PbI2 deficient samples, which decreased the JV hysteresis and increased the photostability. PbI2 deficient synthesis conditions can thus be used to deposit perovskites with excellent crystal quality but with the downside of grain boundaries enriched in organic species, which act as a barrier toward current transport. Exploring ways to tune the synthesis conditions to give the high crystal quality obtained under PbI2 poor condition while maintaining the favorable grain boundary characteristics obtained under PbI2 rich conditions would thus be a strategy toward more efficiency devices.
Unreacted PbI 2 as a Double Edged Sword for Enhancing the Performance of Perovskite Solar Cells

Lead halide perovskites have over the past few years attracted considerable interest as photo absorbers in PV applications with record efficiencies now reaching 22% It has recently been found that not only the composition but also the precise stoichiometry is important for the device performance. Recent reports have, for example, demonstrated small amount of PbI2 in the perovskite films to be beneficial for the overall performance of both the standard perovskite, CH3NH3PbI3, as well as for the mixed perovskites (CH3NH3)x(CH(NH2)2)(1 x)PbBryI(3 y) In this work a broad range of characterization techniques including X ray diffraction (XRD) scanning electron microscopy (SEM) transmission electron microscopy (TEM) photo electron spectroscopy (PES) transient absorption spectroscopy (TAS) UV vis, electroluminescence (EL) photoluminescence (PL) and confocal PL mapping have been used to further understand the importance of remnant PbI2 in perovskite solar cells. Our best devices were over 18% efficient, and had in line with previous results a small amount of excess PbI2. For the PbI2 deficient samples, the photocurrent dropped, which could be attributed to accumulation of organic species at the grain boundaries, low charge carrier mobility, and decreased electron injection into the TiO2. The PbI2 deficient compositions did, however, also have advantages. The record Voc was as high as 1.20 V and was found in PbI2 deficient samples. This was correlated with high crystal quality, longer charge carrier lifetimes, and high PL yields and was rationalized as a consequence of the dynamics of the perovskite formation. We further found the ion migration to be obstructed in the PbI2 deficient samples, which decreased the JV hysteresis and increased the photostability. PbI2 deficient synthesis conditions can thus be used to deposit perovskites with excellent crystal quality but with the downside of grain boundaries enriched in organic species, which act as a barrier toward current transport. Exploring ways to tune the synthesis conditions to give the high crystal quality obtained under PbI2 poor condition while maintaining the favorable grain boundary characteristics obtained under PbI2 rich conditions would thus be a strategy toward more efficiency devices.  Lead halide perovskites have during the past few years attracted considerable interest as light absorbers in solar cells. The first Received: June 19, 2016 Published: July 20, 2016 Article
Embedded system design for real time interaction with Smart Wheelchair
Venue: 2016 Symposium on Colossal Data Analysis and Networking (CDAN)

Ubiquitous devices are becoming a part of people's day to day life. Smart devices not only aid to people's life but also are becoming a crucial part of physically challenged and aged people. The need for safe and independent mobility for the elderly and physical challenged people is of prime concern. The paper deals with creation of a Smart Wheel Chair (SWC) that mainly focuses on the mentioned issue in a very affordable way and to a greater extent. The Wheel Chair is controlled by RTOS as its core operating system. It consists of a touch screen based navigation system along with accident prevention and fall detection. A semi automatic vision function, heart rate sensors and physiological stress sensors have been integrated. GPRS system is used for location determination and GSM is used to communicate in those cases where certain abnormal events like falling, accident or health issues are trigged. The real time interaction functions are designed with the motive to make the user operating the wheel chair completely self dependent and his interaction with the environment can be like of a normal person.
Feature Sub Selection over High Dimensional Data based on Classification Models

The main objective of this paper achieves feature selection in cluster categorical data sets. Although efforts have been made to fix the problem of clustering particular details via group outfits, with the results being competitive to traditional methods, it is noticed that these techniques unfortunately generate a final details partition based on imperfect details. The actual ensemble information matrix provides only cluster data point interaction, with many entries being left unknown. Feature choice includes determining a part of the most useful functions which makes suitable outcomes as the original entire set of functions. A function choice requirements may be analyzed from both the performance and performance opinions.  While the performance concerns the time required to find a part of functions, the performance is associated with the quality of the part of functions. Centered on these requirements, Fast clustering based function selection algorithm (FAST) is suggested and experimentally analyzed in this paper.  The FAST requirements works in two steps. In the starting point, functions are separated into groups by using graph theoretic clustering methods. In the second phase, the most associate function that is highly relevant to target classes is selected from each group to form a part of functions.  The performance and performance of the FAST requirements are analyzed through a scientific study. The results, on 35 freely available real world high dimensional picture, small range, and written text information, show the FAST not only produces more compact subsets of features but also increases the activities of the four types of classifiers.
Recent Progress in Cobalt Based Heterogeneous Catalysts for Electrochemical Water Splitting.
Venue: Advanced materials

Water electrolysis is considered as the most promising technology for hydrogen production. Much research has been devoted to developing efficient electrocatalysts for hydrogen production via the hydrogen evolution reaction (HER) and oxygen production via the oxygen evolution reaction (OER) The optimum electrocatalysts can drive down the energy costs needed for water splitting via lowering the overpotential. A number of cobalt (Co) based materials have been developed over past years as non noble metal heterogeneous electrocatalysts for HER and OER. Recent progress in this field is summarized here, especially highlighting several important bifunctional catalysts. Various approaches to improve or optimize the electrocatalysts are introduced. Finally, the current existing challenges and the future working directions for enhancing the performance of Co implicated electrocatalysts are proposed.
Requirements for Product service Description at e marketplaces in the Manufacturing Domain

Industrial procurement is exposed to an increased service oriented supplier market. However, industrial e marketplaces for product services that are accepted by buying experts are rare. Possible buyer benefits of e markets such as access to a wider range of markets, accumulation of required information, and increase of market transparency cannot be utilized. Currently, product services are at best traded within closed silos that offer mainly manual search and comparison capabilities through a web storefront. A lack of existing "generic" industry sector specific concepts for service description is a main problem that the potential of e commerce is not utilized for product services. This article analyzes the requirements for service representation at e markets regarding the manufacturing domain. State of the art concepts of business service description are considered at the beginning of this research. Because of the heterogeneity of product services, a case study was conducted in order to identify relevant product services in the manufacturing domain. In order to study a real case scenario, a "first tier supplier" in the automotive industry was used in this research study. This company is specialized in systems engineering and systems serial assembly. Typical product services of this company source are manufactured products needed for serial production, for example, casting, milling, turning, or injecting molding parts, alongside a wide range of services. Investigating the professional purchasing department was necessary to analyze the requirements in service description throughout the complete buying process, commencing with the conceptual product design stage until the serial product delivery.
CDM Core: A Manufacturing Domain Ontology in OWL2 for Production and Maintenance
Venue: KEOD

Ontology engineering is known to be a complex, time consuming, and costly process, in particular, if an ontology has to be developed from scratch, and respective domain knowledge has to be formally encoded. This paper presents the largest publicly available manufacturing ontology CDM Core in the standard formal ontology language OWL2 (available at: http:/sourceforge.net/projects/cdm core/ The CDM Core ontology has been developed within the European research project CREMA in close collaboration with the user partners in order to sufficiently cover the CREMA use case domains of metal press maintenance and automative exhaust production. CDM Core makes use of many relevant standard vocabularies and ontologies, with only about one fifth of its size being CREMA use case specific. The practical applicability of CDM Core for semantic annotation of domain related process models, sensor data and services has been approved by the user partners, and its quality according to selected common criteria of verification and validation was successfully evaluated. From the public release of the CDM Core, we expect to cover the lack of a base common ontology for the manufacturing domain, thanks to feedbacks from industrial reuse and improvements from the community.
Epidemiology of Extended Spectrum b Lactamase Producing Escherichia coli in the Human Livestock Environment
Venue: Current Clinical Microbiology Reports

The detection of extended spectrum b lactamase (ESBL) producers in the fecal flora of healthy food producing animals has increased in recent years. This is mainly attributed to the intense use of antibiotics in this sector. There is growing concern regarding the risk of spread of such bacteria, especially Escherichia coli and Salmonella, to humans and to the environment. The occurrence of ESBL producers in the major groups of livestock, i.e. poultry, pigs, cattle, and sheep is highlighted and discussed with regard to data that provide evidence for transmission of their resistance traits from livestock to humans and to farm environments.
Design and Development of IOT Monitoring Equipment for Open Livestock Environment

In this paper, livestock and poultry breeding environment has a great effect on animal growth, prevention and cure of animal diseases, and improvement of animal products. Acquisition of animal breeding environment information is the key of livestock and poultry breeding. Schematic diagrams and PCB drawings of a 16 channel wireless monitoring device for livestock and poultry breeding environment were designed. The MCU program used to acquire breeding environment information, the heartbeat mechanism program and the program of reading sensing data in a loop was written. The structure diagram of the environmental monitoring devices was designed. Open field livestock and poultry breeding environment monitoring devices based on Internet of Things (IOT) were developed by using system integration technology. The devices were put on a trial application in 11 livestock and poultry farms. Stability and adaptability of the devices were tested. The design and development of this device can provide technical support for information, automation, and modern management of livestock and poultry farming.
Distribution of virulence factors in ESBL producing Escherichia coli isolated from the environment, livestock, food and humans.
Venue: The Science of the total environment

In this study, extended spectrum ss lactamase (ESBL) producing Escherichia coli isolates recovered from the following sources were characterized with regard to the occurrence and distribution of uropathogenic and enteric pathogenic virulence factors: surface waters (rivers and lakes, n=60) the intestines of freshwater fish (n=33) fresh vegetables (n=26) retail poultry meat (n=13) and the fecal samples of livestock (n=28) healthy humans (n=34) and primary care patients (n=13) Among the 207 isolates, 82% tested positive by PCR for one or more of the virulence factors (VF) that predict uropathogenicity, TraT, fyuA, chuA, PAI, yfcv or vat. Uropathogenic E. coli (UPEC) were detected in each of the analyzed sources. Regarding virulence factors for intestinal pathogenic E. coli, these were found more rarely and predominantly associated with the aquatic environment, with aagR (EAEC) found in isolates from surface waters and STp (porcine heat stable enterotoxin) and LT (heat labile enterotoxin) associated with isolates from fish. Aggregate VF scores (the number of unique virulence factors detected for each isolate) were lowest among isolates belonging to phylogenetic group B1 and highest among group B2. Clustering of the isolates by phylogenetic group, multilocus sequence type (MLST) and ESBL types revealed clonal overlaps of A:ST10(CTX M 1) and D:ST350(CTX M 1) between the sources of livestock, poultry meat and healthy humans, suggesting livestock, in particular poultry, represents a potential reservoir for these particular UPEC clones. The clones A:ST10(CTX M 55) and B2:ST131(CTX M 27) harboring uropathogenic virulence factors were significantly associated with fresh vegetables and with fish, respectively. Further clonal complexes with source overlaps included D:ST38(CTX M 14) D:ST69(CTX M 15) D:ST405(CTX M 15) and D:ST648(CTX M 15) which were found in surface water and healthy humans. Identifying potential reservoirs of UPEC in the environment, animals, food and humans is important in order to assess routes of transmission and risk factors for acquiring UPEC.
Activation of a plasmid situated type III PKS gene cluster by deletion of a wbl gene in deepsea derived Streptomyces somaliensis SCSIO ZH66
Venue: Microbial Cell Factories

BackgroundActinomycete genome sequencing has disclosed a large number of cryptic secondary metabolite biosynthetic gene clusters. However, their unavailable or limited expression severely hampered the discovery of bioactive compounds. The whiB like (wbl) regulatory genes play important roles in morphological differentiation as well as secondary metabolism; and hence the wblAso gene was probed and set as the target to activate cryptic gene clusters in deepsea derived Streptomyces somaliensis SCSIO ZH66.ResultswblAso from deepsea derived S. somaliensis SCSIO ZH66 was inactivated, leading to significant changes of secondary metabolites production in the DwblAso mutant, from which a pyrone compound violapyrone B (VLP B) was isolated. Subsequently, the VLP biosynthetic gene cluster was identified and characterized, which consists of a type III polyketide synthase (PKS) gene vioA and a regulatory gene vioB; delightedly, inactivation of vioB led to isolation of another four VLPs analogues, among which one was new and two exhibited improved anti MRSA (methicillin resistant Staphylococcus aureus, MRSA) activity than VLP B. Moreover, transcriptional analysis revealed that the expression levels of whi genes (whiD, whiG, whiH and whiI) and wbl genes (wblC, wblE, wblH, wblI and wblK) were repressed by different degrees, suggesting an intertwined regulation mechanism of wblAso in morphological differentiation and secondary metabolism of S. somaliensis SCSIO ZH66.ConclusionswblA orthologues would be effective targets for activation of cryptic gene clusters in marine derived Streptomyces strains, notwithstanding the regulation mechanisms might be varied in different strains. Moreover, the availability of the vio gene cluster has enriched the diversity of type III PKSs, providing new opportunities to expand the chemical space of polyketides through biosynthetic engineering.
A New Dioic Acid from a wbl Gene Mutant of Deepsea Derived Streptomyces somaliensis SCSIO ZH66
Venue: Marine drugs

The wblAso gene functions as a global regulatory gene in a negative manner in deepsea derived Streptomyces somaliensis SCSIO ZH66. A new dioic acid (1) as well as two known butenolides (2 and 3) were isolated from the DwblAso mutant strain of S. somaliensis SCSIO ZH66. The structure of 1 was elucidated by a combination of spectroscopic analyses, including MS and NMR techniques. In the cell growth inhibitory evaluation, compound 3 exhibited moderate activity against the human hepatic carcinoma cell line (Huh7.5) with an IC50 value of 19.4 mg/mL, while compounds 1 and 2 showed null activity up to 100 mg/mL.
Multiple Brain Abscesses due to Streptococcus anginosus: Prediction of Mortality by an Imaging Severity Index Score
Venue: Case reports in radiology

An elderly patient with altered mental status, brain abscesses, ventriculitis, and empyemas died of septic shock and brain abscesses secondary to Streptococcus anginosus despite aggressive treatment. An imaging severity index score with a better prognostic value than the Glasgow coma scale predicted mortality in this patient.
The influence of lexical access ability and vocabulary knowledge on measures of speech recognition in noise
Venue: International journal of audiology

The main objective was to investigate the effect of linguistic abilities (lexical access ability and vocabulary size) on different measures of speech in noise recognition in normal hearing listeners with various levels of language proficiency.  Speech reception thresholds (SRTs) were measured for sentences in steady state (SRTstat) and fluctuating noise (SRTfluc) and for digit triplets in steady state noise (DIN) Lexical access ability was measured with a lexical decision test and a word naming test. Vocabulary size was also measured. For the SRT, keyword scoring and sentence scoring were compared.  To introduce variation in linguistic abilities, three groups of 24 young normal hearing listeners were included: higher educated native, lower educated native, and higher educated non native listeners.  Lexical access ability was most accurately measured with combined results of lexical decision and word naming. Lexical access ability explained 60% of the variance in SRT. The effect of linguistic abilities on SRTs was up to 5.6 dB for SRTstat and 8 dB for SRTfluc. Using keyword scoring reduced this effect by approximately 1.5 dB. For DIN the effect of linguistic ability was less than 1 dB.  Lexical access ability is an important predictor of SRTs in normal hearing listeners. These results are important to consider in the interpretation of speech in noise scores of hearing impaired listeners.