nils-herrmann/clean_scirepeval huggingface dataset:
RFHOC: A Random Forest Approach to Auto Tuning Hadoop's Configuration
Venue: IEEE Transactions on Parallel and Distributed Systems

Hadoop is a widely used implementation framework of the MapReduce programming model for large scale data processing. Hadoop performance however is significantly affected by the settings of the Hadoop configuration parameters. Unfortunately, manually tuning these parameters is very time consuming, if at all practical. This paper proposes an approach, called RFHOC, to automatically tune the Hadoop configuration parameters for optimized performance for a given application running on a given cluster. RFHOC constructs two ensembles of performance models using a random forest approach for the map and reduce stage respectively. Leveraging these models, RFHOC employs a genetic algorithm to automatically search the Hadoop configuration space. The evaluation of RFHOC using five typical Hadoop programs, each with five different input data sets, shows that it achieves a performance speedup by a factor of 2.11 <inline formula><tex math notation="LaTeX"\times$/tex math><alternatives> <inline graphic xlink:type="simple" xlink:href="yu ieq1 2449299.gif"/alternatives>/inline formula> on average and up to 7.4 <inline formula><tex math notation="LaTeX"\times$/tex math><alternatives> <inline graphic xlink:type="simple" xlink:href="yu ieq2 2449299.gif"/alternatives>/inline formula> over the recently proposed cost based optimization (CBO) approach. In addition, RFHOC's performance benefit increases with input data set size.
Critical Thinking in Online Educational Discussions Measured as Progress through Inquiry Phases: A Discussion of the Cognitive Presence Construct in the Community of Inquiry Framework

The development of critical thinking is a rationale for higher education and an important aspect of online educational discussions. A key component in most accounts of critical thinking is to evaluate the tenability of claims. The community of inquiry framework is among the most influential frameworks for research on online educational discussions. In this framework, cognitive presence accounts for critical thinking as progress through the following phases of inquiry: triggering event, exploration, integration, and solution. This article discusses the cognitive presence construct as a tool for measuring critical thinking. The article traces the philosophical inspirations of the community of inquiry framework and discusses the construct validity of the cognitive presence construct. Empirical findings enabled by the framework are briefly reviewed and discussed. The author argues that since the cognitive presence construct only to a limited degree addresses the discussants' evaluation of a claim's tenability, the construct possesses weaknesses for assessing critical thinking in discussions. In making this claim, the article contributes to methodological and theoretical discussions about research on critical thinking in online educational discussions. Le developpement de la pensee critique est une justification pour l'enseignement superieur et un aspect important des discussions educatives en ligne. Un element cle dans la plupart des comptes rendus de la pensee critique est d'evaluer la validite des revendications. Le cadre de reference Community of Inquiry se trouve parmi les cadres de reference les plus influents pour la recherche sur les discussions educatives en ligne. Dans ce cadre de reference, la presence cognitive represente la pensee critique sous forme de progres pendant les phases suivantes de l'enquete evenement declencheur, exploration, integration et solution. Cet article traite du construit de la presence cognitive comme un outil pour mesurer la pensee critique. L'article retrace les inspirations philosophiques du cadre de reference Community of Inquiry et discute de la validite conceptuelle du construit de la presence cognitive. Les resultats empiriques actives par le cadre de reference sont brievement examines et discutes. L'auteur fait valoir que, puisque le construit de la presence cognitive aborde l'evaluation des participants a une discussion de la validite d'une revendication, seulement a un degre limite, le construit possede des faiblesses pour evaluer la pensee critique dans les discussions. En faisant cette revendication, l'article contribue aux discussions methodologiques et theoriques au sujet de la recherche sur la pensee critique dans les discussions educatives en ligne.
The Role of Non Technological Innovations in Services: The Case of Food Retailing

A growing proportion of innovation, especially in consumer based industries, is linked to both aesthetic and symbolic components, yet there is still wide uncertainty as to how consumers respond to the design of products and whether their product choices are consistent across product categories. We draw attention to instances whereby less technology intensive initiatives can convey innovation in services industries. The focus is on the case of Eataly, a food retailer in which, it is argued, non technological innovations have shaped the firm's core values and triggered consumer interest towards a supermarket where, besides physical goods, experience has become the object of transaction. By emphasizing the importance for retailers of focusing not only on single products, but also on other dimensions of the firm's organization, we intend to contribute to the literature that explores changing facets of innovation in service industries.
Towards Future Customer Experience: Trends and Innovation in Retail

Retail companies today face new challenges with more intensified competition due to the accelerated pace of technological change, more sophisticated management practices, and industry consolidation. Hence, retail companies have shifted their focus from not only boosting sales but also to ways of attracting and retaining customers. This paper offers a new perspective on how to improve the performance of retail organizations by enhancing customer experience. It suggests that customer experience and use of technology are fundamental drivers of consumer loyalty. We propose a new shopping experience model based on a synergic combination of design thinking and marketing intelligence methodologies. The role of technology in customer satisfaction is also integrated into this novel approach. Based on this model, we developed a smartphone app and then applied it to a supermarket located in Monterrey, the third largest city in Mexico. We conclude that technology based resources can contribute to improving interactions between the store and customers, supporting the latter to make decisions about purchases. However, regardless of how advanced the technology is, these solutions cannot guarantee adding high value to organizations unless an integrated context analysis is used and managers implement appropriate design strategies that factor in customer experiences. The current research has important implications for decision makers in business strategy, marketing intelligence, and strategic foresight, as well as retail practitioners.
REDES DE EMPRENDIMIENTO: PERCEPCION Y EFECTOS EN LA CULTURA EMPRENDEDORA

The numerous economic and social changes arising from the current situation of financial crisis, has raised the need to advance research on the processes leading to the promotion of entrepreneurship as a basic competence that allows the acquisition of skills aimed at successful social development, configuring the entrepreneur as a transforming social agent and driver of growth. The theoretical perception about the phenomenon of entrepreneurship is not individualist, emerging within this field the study of social networks as a valuable asset for the entrepreneur, since it allows them to access resources and information and are a source of competitiveness and development. This article is part of the exploratory study phase of the R D I project that aims to determine curricular educational policy actions aimed at incorporating the entrepreneurial culture in the formal educational environment. Thus, the specific objective of this phase is to determine the importance given by the older university students to formal and informal entrepreneurship networks. The choice of this population sector is justified by the guidelines that at a European level focus on the elderly as a valuable resource for entrepreneurship, due to their training, experience, knowledge and skills necessary to participate in the entrepreneurial competence setting.
The social world as an experimental game

This paper presents a selective review of decades of empirical research on behavioral games, with a particular focus on experimental games. We suggest that games effectively (but imperfectly) model many human social interactions, and we present important findings from six popular experimental games Prisoner's and Social Dilemmas, and the Trust, Ultimatum, Dictator, and Deception games to discuss their theoretical and empirical implications as well as their various insights into human nature. We close by asking several fundamental questions about games and suggesting several directions and ideas for future research.
Prevention of yield losses caused by glyphosate in soybeans with biostimulant

Enhanced selectivity can be achieved for some herbicide treatments through the application of chemicals that reduce or protect plants from injuries. The objective of this work was to evaluate the potential to prevent herbicide yield losses in glyphosate resistant soybean by the use of the biostimulant Fertiactyl POS. Based on results from two field experiments, the association of Fertiactyl POS with glyphosate applied post emergence of soybeans reduced foliar injuries and prevented yield losses caused by the herbicide, either when glyphosate was applied in one single application or when it was applied in two sequential applications. However, the application of the Fertiactyl POS was not enough to assuage the injuries caused by the mixtures of glyphosate+lactofen and glyphosate+chlorimuron ethyl.  Glycine max, mitigation, selectivity.
Exploration of Corpus Augmentation Approach for English Hindi Bidirectional Statistical Machine Translation System

Even though lot of Statistical Machine Translation(SMT) research work is happening for English Hindi language pair, there is no effort done to standardize the dataset. Each of the research work uses different dataset, different parameters and different number of sentences during various phases of translation resulting in varied translation output. So comparing these models, understand the result of these models, to get insight into corpus behavior for these models, regenerating the result of these research work becomes tedious. This necessitates the need for standardization of dataset and to identify the common parameter for the development of model. The main contribution of this paper is to discuss an approach to standardize the dataset and to identify the best parameter which in combination gives best performance. It also investigates a novel corpus augmentation approach to improve the translation quality of English Hindi bidirectional statistical machine translation system. This model works well for the scarce resource without incorporating the external parallel data corpus of the underlying language. This experiment is carried out using Open Source phrase based toolkit Moses. Indian Languages Corpora Initiative (ILCI) Hindi English tourism corpus is used. With limited dataset, considerable improvement is achieved using the corpus augmentation approach for the English Hindi bidirectional SMT system.
Studies on Nonlinear Behavior of Shear Walls of Medium Aspect Ratio under Monotonic and Cyclic Loading

AbstractStructures designed according to performance based seismic design (PBSD) are required to satisfy the target performance. PBSD requires extensive research for capacity evaluation and development of reliable nonlinear models. Shear walls are the ideal choice to resist lateral loads in multistoried RC buildings. They provide large strength and stiffness to buildings in the direction of their orientation (in plan) which significantly reduces lateral sway of the building. Experimental studies on nonlinear behavior of shear walls of medium aspect ratios are limited. Nonlinear performance of medium aspect ratio shear wall specimens are studied on three identical shear wall specimens through application of monotonic and cyclic loading. In order to study the effect of axial load on the flexural behavior and ductility of shear wall, a parametric study is conducted using a layer based approach, which is used to generate the analytical pushover curve for the shear wall and validated with the experimentally e.
Untangling the protease web in COPD: metalloproteinases in the silent zone
Venue: Thorax

The idea that unregulated protease activity underlies the pathogenesis of COPD has been prominent since the recognition that genetic loss of a1 antitrypsin led to unregulated neutrophil elastase activity and premature  Increased proteolysis by other proteases, particularly the matrix metalloproteinases (MMPs) has since been implicated in COPD. The MMPs are a family of over 20 zinc dependent endopeptidases, initially identified as extracellular matrix (ECM) degrading enzymes and classified according to their ECM substrates. In individual studies, genetic association, overexpression, and in fewer cases, activity of individual proteases have been associated with COPD in humans and smoke induced emphysema in animals. While a number of MMPs and disintegrin and metalloproteinases have been studied in COPD at some level, most interest has focused on MMP 1, MMP 12 and MMP 9. MMP 1 is overexpressed by alveolar macrophages, type II pneumocytes and airway epithelial cells. The protein is induced by cigarette smoke and is capable of degrading collagens I and III, the most abundant lung proteins.2 ,3 MMP 9 expressed by neutrophils and macrophages is overexpressed in COPD although MMP 9 activity, rather than protease expression, is suppressed in stable patients compared with healthy smokers but activated during  Although MMP 9 has elastase activity in vitro, its action in COPD may be due to generation of prolyl glycine proline (PGP) a collagen derived neutrophil chemotactic matrikine rather than  MMP 12 is an elastase associated with the development of COPD by genome wide association study,7 whose presence and activity in sputum are associated airflow obstruction8 and in which single nucleotide polymorphisms that reduce enzyme activity are associated with protection from emphysema in COPD.9 While the 'classical' matrix degrading actions of these proteases can be easily related to the pathogenesis of COPD, unfortunately the reality is not that straightforward.
Friction processes of selected polymers sliding on steel and duralumin in a lubricant environment

The article presents the results of tribological research into engineering polymers (POM, PEEK, PPS) cooperating in sliding motion with 316L steel and EN AW 2017A aluminium alloy in the presence of a liquid (water, hydraulic oil HLP68) This type of friction pair may occur in hydraulic systems (gear pumps, valves, etc. For comparison, additionally, the results of tribological research Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Department of Machine Design and Tribology, ul. Wybrzeze St. Wyspianskiego 27, 50 370 Wroclaw, Poland. D. Serikbayev East Kazakhstan State Technical University in Ust Kamenogorsk, Kazakhstan. T R I B O L O G I A 4 2016 202 carried out in dry friction conditions have been shown. In addition, the results of microscopic study of the sliding surfaces of polymeric materials have been presented. Analysis of the test results allows one to describe the processes of friction and wear of the studied sliding pairs.
Pathological Joking or Witzelsucht Revisited.
Venue: The Journal of neuropsychiatry and clinical neurosciences

Humor, or the perception or elicitation of mirth and funniness, is distinguishable from laughter and can be differentially disturbed by neuropsychiatric disease. The authors describe two patients with constant joking, or Witzelsucht, in the absence of pseudobulbar affect and review the literature on pathological humor. These patients had involvement of frontal structures, impaired appreciation of nonsimple humor, and a compulsion for disinhibited joking. Current neuroscience suggests that impaired humor integration from right lateral frontal injury and disinhibition from orbitofrontal damage results in disinhibited humor, preferentially activating limbic and subcortical reward centers. Additional frontal subcortical circuit dysfunction may promote pathological joking as a compulsion.
Analysis of nonlinear phenomena in digital integral controlled Buck converters
Venue: 2016 IEEE Region 10 Conference (TENCON)

Nonlinear phenomena in a digital integral controlled synchronous Buck converter working in continuous conduction mode (CCM) are studied in this paper. Firstly, the closed loop model of the system in z domain is established. Next, the stability boundary of the system is calculated according to the Routh stability criterion. Then, the two nonlinear quantizers, namely the analog to digital converter (ADC) and the digital pulse width modulator (DPWM) are characterized via describing function method, and the approximate boundary to avoid limit cycle oscillations of output voltage is obtained. Effectiveness of the calculated boundaries is validated by simulation in Simulink. It is found that the system will experience limit cycle oscillations and Hopf bifurcations successively with the increase of integral gain.
Two color and multistatic space debris laser tracking

Collisions with Space Debris in orbit are a growing threat to operational satellites and manned space missions. Optical observations, providing direction information and radar tracking providing range are established methods for maintaining a valid catalog of space debris items and their orbits. From this catalog one can obtain the probability of collisions and appropriate maneuvers can be scheduled. In an ideal scenario SLR can provide both, range information and pointing angles at the same time, thus speeding up the orbit determination process of space debris targets as well as providing a better forecast of the respective orbit. In order to investigate the potential of the SLR technique the ESA GSTP project "Accurate Orbit Determination with Laser Tracking/Tasking" was started in 2013. We report on the technical progress achieved over the last year by introducing improved visual tracking, IR ranging on the fundamental frequency of Nd:YAG and a new tracking site in Stuttgart. Furthermore it was possible to intensify the multi static ranging including Graz, Wettzell and Stuttgart. These results are also presented.
Review of Security Vulnerabilities in the IPv6 Neighbor Discovery Protocol

(IPv6) contains a new protocol, Neighbor Discovery Protocol (NDP) that replaces Address Resolution Protocol (ARP) in Internet Protocol version 4 (IPv4) router discovery, and redirect. If implemented without any security mechanism, NDP contains vulnerabilities. Using spoofed Media Access Control (MAC) addresses in an NDP message, a malicious host can launch Denial of Service or Man in the Middle attacks. IPv6 depends heavily on NDP, which appears in the network in the form of ICMPv6. If ICMP is disabled or dropped from the network, IPv6 does not operate, in contrast to IPv4. The importance of the NDP protocol in the IPv6 network is that it catches attackers' attention on NDP vulnerabilities that they can exploit. This paper describes and reviews some of the fundamental attacks on NDP, prevention mechanisms, and current detection mechanisms for NDP based attacks.
Fast, Memory Efficient Construction of Voxelized Shadows
Venue: IEEE Transactions on Visualization and Computer Graphics

We present a fast and memory efficient algorithm for generating Compact Precomputed Voxelized Shadows. By performing much of the common sub tree merging before identical nodes are ever created, we improve construction times by several orders of magnitude for large data structures, and require much less working memory. To further improve performance, we suggest two new algorithms with which the remaining common sub trees can be merged. We also propose a new set of rules for resolving undefined regions, which significantly reduces the final memory footprint of the already heavily compressed data structure. Additionally, we examine the feasibility of using CPVS for many local lights and present two improvements to the original algorithm that allow us to handle hundreds of lights with high quality, filtered shadows at real time frame rates.
A review on hybrid electric vehicles architecture and energy management strategies

Faced with environmental issues caused by fossil fuel burning in the industrial and transportation sectors, innovations towards cleaner solutions to replace the ever diminishing fossil fuels have been the focus of not only researchers but governments all around the world. The hybrid electric vehicle (HEV) technology is the result of the desire to have vehicles with a better fuel economy and lower tailpipe emissions to meet the requirements of environmental policies as well as to absorb the impact of rising fuel prices. The objectives are met by combining a conventional internal combustion engine (ICE) with one or more electric motors powered by a battery pack that can be charged using an on board generator and the regenerative braking technology to power the transmission. The challenge is to develop an efficient energy management strategy (EMS) to satisfy the objectives while not having a reduced vehicle performance. In this paper, EMSs that are proposed and developed in the recent years are revisited and reviewed. Additionally, the Plug in HEV is discussed in a new perspective from the EMS point of view. The through the road (TtR) HEV with in wheel motors (IWM) is a fairly new concept in the HEV design that features less complicated configuration with reduced hardware requirements and lower cost. Recent research findings are evaluated throughout this paper leading to a hypothetical TtR HEV materialization. A thorough discussion is made encompassing the advantages and disadvantages of the concept, its performance compared to conventional HEVs and the way forward.
A comprehensive characterization of the time resolution of the Philips Digital Photon Counter

Photodetectors with excellent time resolution are becoming increasingly important in many applications in medicine, high energy and nuclear physics applications, biology, and material science. Silicon photomultipliers (SiPM) are a novel class of solid state photodetectors with good timing properties. While the time resolution of analog SiPMs has been analyzed by many groups, the time resolution of the digital photon counter (DPC) developed by Philips has not yet been fully characterised. Here, the timing capabilities of the DPC are studied using a femtosecond laser. The time resolution is determined for complete dies, single pixels, and individual single photon avalanche diodes (SPADs) The measurements cover a broad dynamic range, from intense illumination down to the single photon level, and were performed at various temperatures between 0degC and 20degC. The measured single photon time resolution (SPTR) ranges from 101 ps FWHM for the DPC3200 sensor pixel to 247 ps FWHM for the DPC6400 sensor die. An extensive study of the single SPAD time resolution, ranging from single photon to very high laser intensities ~1000 photons per pulse) yielded a time resolution of 48 ps FWHM at the single photon level.