nils-herrmann/clean_scirepeval huggingface dataset:
Polynomial Matrix Completion for Missing Data Imputation and Transductive Learning
Venue: AAAI
Year: 2020

This paper develops new methods to recover the missing entries of a high rank or even full rank matrix when the intrinsic dimension of the data is low compared to the ambient dimension. Specifically, we assume that the columns of a matrix are generated by polynomials acting on a low dimensional intrinsic variable, and wish to recover the missing entries under this assumption. We show that we can identify the complete matrix of minimum intrinsic dimension by minimizing the rank of the matrix in a high dimensional feature space. We develop a new formulation of the resulting problem using the kernel trick together with a new relaxation of the rank objective, and propose an efficient optimization method. We also show how to use our methods to complete data drawn from multiple nonlinear manifolds. Comparative studies on synthetic data, subspace clustering with missing data, motion capture data recovery, and transductive learning verify the superiority of our methods over the state of the art.
Bringing tropical forest biodiversity conservation into financial accounting calculation
Year: 2013

This paper seeks to examine how the biodiversity comprising a tropical forest ecosystem is being protected as a result of having its conservation brought into financial accounting calculations by constructing a greenhouse gas emissions offset product to sell on the voluntary over the counter carbon markets.  The research examines a single embedded case study of a biodiversity conservation project in Kenya. The resulting discussion builds upon the existing accounting and organisation studies literature regarding the construction of markets.  Whilst the case examined does successfully bring tropical forest biodiversity conservation into the financial accounting calculations of the sellers and buyers of the offset product, via processes of objectification and singularisation, there are considerable accounting obstacles to constructing a calculative mechanism capable of achieving this on a global scale to facilitate financing of the conservation of all the world's remaining tropical forest biodiversity.  The paper contributes to the debate on accounting for biodiversity by examining market construction as a theoretical framework for turning the loss/conservation of biodiversity from an externality into an entity that is taken into account in organisations' calculations of profit and loss.
Intergroup Conflict And Cooperation: The Robbers Cave Experiment
Year: 2013

Preface (1954) Preface (1961) Chapter 1. Integrating Field Work and Laboratory in Small Group Research Chapter 2. Approach, Hypotheses and General Design of the Study Chapter 3. Role of Staff, Subject Selection, Experimental Site Chapter 4. Experimental Formation of In Groups Chapter 5.  Production of Negative Attitudes Toward the Out Group Chapter 6.  Assessment of In Group Functioning and Negative Attitudes Toward the Out Group Chapter 7.  Reducing Friction (Stage 3) Chapter 8.
Non contact, bi directional tool tip vibration measurement in CNC milling machines with a single optical sensor
Year: 2020

Vibration measurements of tools are significant for machine modelling, error prone state identification and machine operation optimization. In the milling process, forced vibrations are the main factor resulting in shape deviations as well surface roughness of machined work pieces and depend on the spindle speed and tool properties. Numerical models for predicting the dynamic behavior of machine systems can help to reduce vibrations. For an optimization, the model parameters need to be evaluated by simultaneously measuring the vibration of the tool tip in force direction and its vertical direction under different rotational speeds with high spatio temporal resolution. In this work, a non contact, single sensor system and a signal processing algorithm are presented for measuring the vibrational behavior inside of a CNC milling machine with a known force. It enables in situ, simultaneous bi directional vibration measurements directly at the tool tip with measurement rates up to 50 kHz, a circumferential resolution below 230 mm and a displacement uncertainty down to 40 nm, at rotational speeds up to 300 Hz. The dynamic behavior parameters of the tool are evaluated depending on the measured vibration spectrum with relative uncertainties of 10 2 enabling model optimizations. The measurements show a decrease of the natural frequency with increasing spindle speed. While the laser based measurement principle does not bias the vibrational behavior it inherently guarantees orthogonality of the sensing axes, as well.
Fast food consumption and overweight/obesity prevalence in students and its association with general and abdominal obesity
Venue: Journal of preventive medicine and hygiene
Year: 2018

Nowadays, the prevalence of both fast food consumption and overweight/obesity has been increased. This study aimed to estimate the prevalence of fast food consumption and to assess its association with abdominal and general obesity. In an analytical cross sectional study, 300 students were selected randomly from two largest universities in Qom, center of Iran, studying in medical and basic sciences fields in 2015. Data collection was conducted by a modified version of NELSON's fast food questionnaire and anthropometric measures including Waist Hip Ratio (WHR) and Body Mass Index (BMI) Chi square, independent t test, and multivariate logistic regression were used for statistical analysis. According to our results, 72.4% (67.4% in females vs 80.7% in males) had at least one type of fast food consumption in the recent month including sandwich 44.4% pizza 39.7% and fried chicken 13.8% The obesity prevalence based on BMI and WHR was 21.3% (95% CI: 19.4, 23.2% and 33.2% (95% CI: 0.7, 35.7) respectively. Fast food consumption was related to abdominal obesity as WHR (OR: 1.46, 95% CI: 1.11, 2.26) but was not related to general obesity as BMI (OR: 0.97, 95% CI: 0.63, 1.52) The prevalence of fast food consumption and obesity/overweight in Iranian student is high. Fast food consumption was associated with abdominal obesity based WHR, but did not related to general obesity based on BMI.
Continuous terminal sliding mode control with extended state observer for PMSM speed regulation system
Year: 2017

In this paper, we discuss the speed regulation problem of permanent magnet synchronous motor (PMSM) servo systems. Firstly, a continuous terminal sliding mode control (CTSMC) method is introduced for speed loops to eliminate the chattering phenomenon while still ensuring a strong disturbance rejection ability for the closed loop system. However, in the presence of strong disturbances, the CTSMC law still needs to select high gain which may result in large steady state speed fluctuations for the PMSM control system. To this end, an extended state observer (ESO) based continuous terminal sliding mode control method is proposed. The ESO is employed to estimate system disturbances and the estimation is employed by the speed controller as a feed forward compensation for disturbances. Compared to the conventional sliding mode control method, the proposed composite sliding control method obtains a faster convergence and better tracking performance. Also, by feed forward compensating system disturbances and tuning down the gain of the CTSMC law, the fluctuation of steady state speed of the closed loop system is reduced while the disturbance rejection capability of the PMSM system is still maintained. Simulation and experimental results are provided to demonstrate the superior properties of the proposed control method.
Green synthesis of silver nanoparticles using Piper longum catkin extract irradiated by sunlight: antibacterial and catalytic activity
Venue: Research on Chemical Intermediates
Year: 2019

In this study, rapid and cost effective biosynthesis of silver nanoparticles (AgNPs) was synthesized by using Piper longum (P. longum) catkin extract. The bioreduction of AgNPs was initially confirmed by using UV visible spectroscopy which exhibits characteristic absorption peak at 450 nm in 120 s when exposed to sunlight. The phytoconstituents responsible for the reduction of AgNO3 to Ag NPs were examined using Fourier transform infrared spectroscopy. The crystalline nature of Ag NPs was confirmed using the X ray diffraction pattern. Morphological studies confirmed the synthesized Ag NPs were monodispersed and spherical in shape with the size ranging from 15 to 40 nm. The zeta potential analysis of the synthesized AgNPs exhibit negative value 24.3 mV) which indicates higher stability. Further, the proficiency of the synthesized AgNPs was evaluated against mastitis causing bacteria. Hence, the Ag NPs showed the maximum zone of inhibition against Staphylococcus aureus (12.45 mm) Pseudomonas aeruginosa (12.34 mm) and Bacillus subtilis (9.75 mm) In addition, the catalytic efficiency of Ag NPs was investigated for the conversion of methyl orange to hydrazine derivatives, methylene blue to leuco methylene blue, and o nitrophenol to o aminophenol in 4, 5 and 3 min, respectively. Hence, this study explores the doctrine of green chemistry for the rapid production of AgNPs that act as a potential candidate to alleviate mastitis causing bacteria and clear up diverse environmental problems.
Transient Response of Hydraulic Bushing with Inertia Track and Orifice Like Elements
Year: 2013

Hydraulic bushings are widely used in vehicle applications, such as suspension and sub frame systems, for motion control and noise and vibration isolation. To study the dynamic properties of such devices, a controlled laboratory bushing prototype is designed and fabricated. This device has the capability of varying different combinations of long and short flow passages and flow restriction elements. Transient experiments with step up and step down excitations are conducted on the prototype, and the transmitted force responses are measured. The transient properties of several commonly seen hydraulic bushing designs are experimentally studied. Analytical models for bushings with different design features are developed based on the linear system theory. System parameters are then estimated for step responses based on theory and measurements. Finally, the linear models are utilized to analyze the step force measurements, from which some nonlinearities of the bushing system are identified.  Chai, T. Dreyer, J. and Singh, R. "Transient Response of Hydraulic Bushing with Inertia Track and OrificeLike Elements," SAE Int. . ____________________________________ 1224 Downloaded from SAE International by Ohio State University Center for Automotive Research, Thursday, January 23, 2014 06:11:45 PM
Steady wind performance of a 5 kW three bladed H rotor Darrieus Vertical Axis Wind Turbine (VAWT) with cambered tubercle leading edge (TLE) blades
Venue: Energy
Year: 2019

The performance of a 5 kW three bladed H rotor Darrieus Vertical Axis Wind Turbine with cambered Tubercle Leading Edge NACA 0025 blades was established using computational fluid dynamics. 3D models and simulations of the VAWT were realized using CAD and CAE software, after which post processing analyses provided understanding of the VAWT and blade flow physics. Results showed the TLE to be detrimental to flow and performance of a cambered VAWT. Using torque, lift and drag data, the cambered TLE VAWT was shown to deviate significantly against the cambered VAWT over one complete converged rotation. Cambered TLE VAWT blades encounter reduced lift forces and increased drag forces leading to lowered and eventual reversal of torque values. The z vorticity and Q criterion visualizations further supported the numerical results with the post processed images showing vortices the size of the blade chord generated at blade wakes of the cambered TLE. The vortices emanate from the flow separation at the blade crests creeping in at the blade trailing edge at 75deg azimuth and reaching halfway through the blade chord length at 106deg azimuth. Spanwise separation was observed to be restricted at blade crests. The resulting flow degradation translated to the poor performance of the wind turbine.
Factores relacionados con la calidad de vida en la adolescencia
Year: 2018

Resumen Objetivo: Conocer la calidad de vida (CV) y su relacion con estilos de vida en adolescentes de educacion secundaria.  Estudio observacional transversal con 256 estudiantes de 12 a 17 anos de edad, de la provincia de Sevilla (Espana) Se utilizaron modelos de regresion lineal multiple (p <0,05) Resultados: Los chicos presentan mayor puntuacion en diversas dimensiones de CV, relacionandose inversamente el ser chica y la CV fisica, psicologica, familiar y el indice general de CV (p <0,05) El funcionamiento familiar y la realizacion de actividad fisica se asociaron fuertemente a una mejor CV, en todas sus dimensiones. Los modelos multivariados fueron estadisticamente significativos y explicaron desde el 11% de variabilidad de la CV social hasta el 35% del Indice general de CV. Conclusiones: Los hallazgos podrian ser utiles para el desarrollo de intervenciones de promocion de la salud escolar dirigidas a promover estilos de vida saludables y CV.
Donor Consent for Posthumous Reproduction: Legal and Ethical Perspectives
Year: 2018

The advancement of biomedical knowledge usually develops many legal and ethical issues. Legal uncertainties are often raised in many medical treatments using new biotechnology technique as legislation could not keep pace with the rapid progress of biomedical technology. In the 20th century, one of the latest enhancements in biomedicine is Assisted Reproductive Technology (ART) This development has generated new understandings of procreation. While the ethical debates of procreation issue have not been settled yet, biotechnology advancement has allowed post mortem reproduction. Postmortem artificial insemination certainly raises numerous legal and ethical quandaries. Several legal issues including the extraction and use of sperm after death, inheritance, and the potential for legal action concerning wrongful life or negligence by the child  Even though some communities may condemn the practice of posthumous reproduction, empirical finding has indicated that post mortem ART is supported by American society as reported  In similar vein, jurisdictions in several countries, such as the US, the UK, and Australia, have permitted post mortem reproduction  Most of these legislations have reached an agreement in relation to the need of prior consent for posthumous conception from a deceased person. This position will be defended in this paper based on the legal need of consent and the ethical concept of autonomy which considers the best interest of posthumously conceived child.
A unified machine learning method for task related and resting state fMRI data analysis
Venue: 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Year: 2014

Functional magnetic resonance imaging (fMRI) aims to localize task related brain activation or resting state functional connectivity. Most existing fMRI data analysis techniques rely on fixed thresholds to identify active voxels under a task condition or functionally connected voxels in the resting state. Due to fMRI non stationarity, a fixed threshold cannot adapt to intra and inter subject variation and provide a reliable mapping of brain function. In this work, a machine learning method is proposed for a unified analysis of both task related and resting state fMRI data. Specifically, the mapping of brain function in a task condition or resting state is formulated as an outlier detection process. Support vector machines are used to provide an initial mapping and refine mapping results. The method does not require a fixed threshold for the final decision, and can adapt to fMRI non stationarity. The proposed method was evaluated using experimental data acquired from multiple human subjects. The results indicate that the proposed method can provide reliable mapping of brain function, and is applicable to various quantitative fMRI studies.
Desarrollo del geoportal para la gestion del sistema de informacion ALPA de la ESPOCH utilizando el framework Vue.js.
Year: 2019

En la Escuela Superior Politecnica de Chimborazo, el Centro de Investigacion en Modelos de Gestion y Sistemas de Informacion CIMOGSYS desarrollo el Sistema de Gestion de Informacion Alpa (SGI Alpa) para la generacion y manejo de indicadores de planificacion estrategica, procesos internos, acreditacion y evaluacion, de las distintas areas de gestion de la institucion y se determino la necesidad de una visualizacion precisa, pertinente y simplificada de dichos indicadores. Por ello, se desarrollo el geoportal para gestion del SGI Alpa que ofrece la geolocalizacion de las areas de gestion de la ESPOCH y el despliegue oportuno de indicadores SGI Alpa para ayudar a la toma de decisiones. El geoportal se desarrollo bajo la metodologia agil SCRUM, implementando el framework Vue.js y la libreria de geolocalizacion y renderizado 3D. La optimizacion de los modelos 3D se realizo con el software 3D Max y Maya. El sistema propuesto comprende un visor georeferenciado del campus institucional en 3D con despliegue de informacion para la gestion de administracion e infraestructura. A fin de evaluar la funcionalidad del geoportal en terminos de idoneidad y su aporte significativo en la toma de decisiones, se realizo una evaluacion tecnica y encuesta a los tecnicos de gestion administrativa, desarrollo y diseno del centro de investigacion CIMOGSYS y se determino que el geoportal, segun la evaluacion tecnica cumple un 97.66% de funcionalidad mientras que segun la encuesta cumple en un 92.33% esta caracteristica. Ademas, los usuarios consideraron que es una herramienta util de apoyo a la toma de decisiones en un 93.33% Se recomienda continuar con la investigacion de nuevas funcionalidades que permitan expandir la capacidad del geoportal.
Measurement of Oxidatively Induced Clustered DNA Lesions Using a Novel Adaptation of Single Cell Gel Electrophoresis (Comet Assay)
Venue: Current protocols in cell biology
Year: 2010

The two basic groups of complex DNA damage are double strand breaks (DSBs) and non DSB oxidatively induced clustered DNA lesions (OCDLs) The single cell gel electrophoresis (SCGE) or comet assay has been widely used for the detection of low levels of various types of DNA lesions including single strand breaks (SSBs) DSBs, and oxidized bases per individual cell. There are limited data on the use of the comet assay for the detection of non DSB clustered DNA lesions using different repair enzymes as enzymatic probes. This unit discusses a novel adaptation of the comet assay used to measure these unique types of lesions. Until now OCDL yields have been measured using primarily pulsed field agarose gel electrophoresis. The advantages offered by the current approach are: (1) measurement of OCDL levels per individual cell; (2) use of a small number of cells ~10,000) and relatively low doses of ionizing radiation (1 to 2 Gy) or low levels of oxidative stress, which are not compatible with standard agarose gel electrophoresis; and finally, (3) the assay is fast and allows direct comparison with pulsed field gel electrophoresis results.
Non planar, multi gate InGaAs quantum well field effect transistors with high K gate dielectric and ultra scaled gate to drain/gate to source separation for low power logic applications
Venue: 2010 International Electron Devices Meeting
Year: 2010

In this work, non planar, multi gate InGaAs quantum well field effect transistors (QWFETs) with high K gate dielectric and ultra scaled gate to drain and gate to source separations (LSIDE) of 5nm are reported for the first time. The high K gate dielectric formed on this non planar device structure has the expected thin TOXE of 20.5A with low JG, and high quality gate dielectric interface. The simplified S/D scheme is needed for the non planar architecture while achieving significant reduction in parasitic resistance. Compared to the planar high K InGaAs QWFET with similar TOXE, the non planar, multi gate InGaAs QWFET shows significantly improved electrostatics due to better gate control. The results of this work show that non planar, multi gate device architecture is an effective way to improve the scalability of III V QWFETs for low power logic applications.
Low light Image Enhancement based on Joint Decomposition and Denoising U Net Network
Venue: 2020 IEEE Intl Conf on Parallel Distributed Processing with Applications, Big Data Cloud Computing, Sustainable Computing Communications, Social Computing Networking (ISPA/BDCloud/SocialCom/SustainCom)
Year: 2020

In the process of low light image enhancement, how to handle the noise effectively is an important yet challenging problem. Based on Retinex decomposition theory, this paper proposes a deep learning method for low light image enhancement with joint decomposition and denoising. First, we propose a new joint decomposition and denoising enhancement U Net network (JDEU) The network can be trained with low light images only, and high quality normal light images are used as reference guided decomposition network to decompose the desired reflectance component for noise removal. Then, the decomposition result is used as the input of the enhanced network to adjust the illumination component brightness. Finally, the reflectance and the adjusted illumination are reconstructed to produce the enhanced image. Experiments based on LOL dataset show that our method not only performs well in texture details and denoising, but also reduces color distortion and greatly improves the overall visual effect.
Heavy work investment, job engagement, managerial role, person organization value congruence, and burnout: A moderated mediation analysis in USA and Israel
Venue: Current Psychology
Year: 2019

The present research investigates the mediational mechanism of Heavy Work Investment (HWI) between job engagement, managerial roles and work burnout. The paper proposes an expansion to the HWI model (as divided into two dimensions: the investment of time and efforts) by exploring the role of value congruence (between the employees and their workplaces) as a moderator, with a two study cultural differences perspective.  American employees (Study 1) and 221 Israeli employees (Study 2) were collected. Moderated mediation analyses were employed using PROCESS macro for the SPSS. Among others, we found that job engagement positively associates with HWI, but negatively with burnout. Managerial position was not related to any of the variables in either sample. However, the two HWI dimensions display different relationships with burnout; while the investment of efforts at work shows negative links to burnout, the investment of time does not show any consistent correlations with it. Moreover, support for moderated mediation model was only found in the Israeli sample. Implications and future research suggestions are discussed.