nils-herrmann/clean_scirepeval huggingface dataset:
Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
Year: 2017

We present optical and near infrared high contrast images of the transitional disk HD 100546 taken with the Magellan Adaptive Optics system (MagAO) and the Gemini Planet Imager (GPI) GPI data include both polarized intensity and total intensity imagery, and MagAO data are taken in Simultaneous Differential Imaging mode at Ha. The new GPI H band total intensity data represent a significant enhancement in sensitivity and field rotation compared to previous data sets and enable a detailed exploration of substructure in the disk. The data are processed with a variety of differential imaging techniques (polarized, angular, reference, and simultaneous differential imaging) in an attempt to identify the disk structures that are most consistent across wavelengths, processing techniques, and algorithmic parameters. The inner disk cavity at 15 au is clearly resolved in multiple data sets, as are a variety of spiral features. While the cavity and spiral structures are identified at levels significantly distinct from the neighboring regions of the disk under several algorithms and with a range of algorithmic parameters, emission at the location of HD 100546 "c" varies from point like under aggressive algorithmic parameters to a smooth continuous structure with conservative parameters, and is consistent with disk emission. Features identified in the HD 100546 disk bear qualitative similarity to computational models of a moderately inclined two armed spiral disk, where projection effects and wrapping of the spiral arms around the star result in a number of truncated spiral features in forward modeled images.
High speed communication
Year: 2010

This master thesis examines the problems that occur for high speed serial communication. The thesis focus on serial transmission through backplane, coaxial cable and optical fiber. Experiments using RocketIOTM GTP and GTX transceivers are performed at data rates of up to 5 Gbit/s. Measurements are done using integrated bit error rate tester (IBERT) network analyzer and time domain reflectometer. The thesis presents methods to evaluate the transmission quality based on IBERT measurements. The methods uses data from measurements to evaluate performance and estimate BER of the link. Impact on BER from effects such as temperature and attenuation is examined and techniques to strengthen the signal integrity is evaluated in this thesis. The basics of a pulse shaping filter is also proposed.
Evaluation in the Wild: A Distributed Cognition Perspective on Teacher Assessment
Year: 2006

The authors adapted distributed cognition theory to provide a detailed account of how schoolleaders use knowledge of the new programs, existing initiatives, andschool contexts to guide policy implementation.  The study used distributed cognition theory to show how policy implementation studies provide an occasion to understand the influence of context on practice. The article focuses on a case study of (a) a suburban district design of a teacher evaluation policy and (b) a principal's effort to use the evaluation program with the teachers in her middleschool.The authors adaptedthe distributedcognitiontheory to provide ananalytic framework to better address the issues of school leadership.  The authors found that the design of the policy required teacher evaluators to address the tensions between summative and formative evaluation implicit in the program design. In this case, the principal relied heavily on her discretion to determine which features of the teacher evaluationpolicywouldbe emphasizedwith different teachers. The case also providedinsightinto how the principalreconciledthe demandsof evaluation with ongoing instructional and personnel demands.  The distributed cognition framework provided a valuable tool for organizing close studies of the cognitive and contextual dimensions of leadership practice and can provide valuable information about how policies can be designed and used to shape real changes in everyday practice.
Machine Learning Empowered Resource Allocation in IRS Aided MISO NOMA Networks
Venue: ArXiv
Year: 2021

A novel framework of intelligent reflecting surface (IRS) aided multiple input single output (MISO) non orthogonal multiple access (NOMA) network is proposed, where a base station (BS) serves multiple clusters with unfixed number of users in each cluster. The goal is to maximize the sum rate of all users by jointly optimizing the passive beamforming vector at the IRS, decoding order, power allocation coefficient vector and number of clusters, subject to the rate requirements of users. In order to tackle the formulated problem, a three step approach is proposed. More particularly, a long short term memory (LSTM) based algorithm is first adopted for predicting the mobility of users. Secondly, a K means based Gaussian mixture model (K GMM) algorithm is proposed for user clustering. Thirdly, a deep Q network (DQN) based algorithm is invoked for jointly determining the phase shift matrix and power allocation policy. Simulation results are provided for demonstrating that the proposed algorithm outperforms the benchmarks, while the throughput gain of 35% can be achieved by invoking NOMA technique instead of orthogonal multiple access (OMA) Index Terms Deep Q network (DQN) Gaussian mixture model (GMM) Intelligent reflecting surface (IRS) Non orthogonal multiple access (NOMA)
Joint responsibility and understanding of resilience from a DMO perspective an analysis of different situations in Bavarian tourism destinations
Venue: International Journal of Tourism Cities
Year: 2019

PurposeThe purpose of this paper is to discuss responsibility in tourism destinations. On the basis of a resilience approach, central aspects of leadership and of responsibility in destination networks are introduced and, a contribution to a conceptual analysis of the future viability of tourism destinations is made. This contributes to a better understanding of resilience from a destination management organization (DMO) perspective in the context of shared responsibility. achieve this goal, a qualitative interview series was conducted with destination managers in urban and rural areas. The interviews were evaluated using the method of GABEK(r) in order to reveal and visualize semantic relationships between the specific statements. This method allows the representation of linkages and relationships of keywords from interview transcripts in the form of network graphs. major result is the existence of a network of leaders who take responsibility for tourism development within a tourism destination. Within this network, the destination manager once again plays a key role by developing and formulating visions, goals and strategies. In this context, the relevant employees of the DMO have an important role to play, since they are an important resource of tourism development due to their experience and competences. paper contributes to a practical view on the development of visions and strategies. It analyzes challenges and possible ways to communicate with the required political and public actors of the destination as well as with the service providers to regard destination development as a collaborative task.
Developing Fashion/Textile Design Education in Dar es Salaam
Year: 2008

Interviews conducted during May 2007 and at a subsequent workshop on 16th January 2008 confirm that employment opportunities in textile design tend to be limited to the small scale entrepreneurs taking on trainees or staff or to become self employed. Self employment appears to be the most immediate form of business operation in the fashion/textile design business. The local entrepreneurs interviewed in the study were involved in design through manufacture to retail. To help the entrepreneurs maximise their opportunities, there are short courses in business development, management, marketing and craft skills and links with organisations such as CTI and TraidCraft (through which they have gained information such as colour trends but this is sporadic) At a workshop on January 16th 2008, representatives from handcraft and small scale organisations (eg ADAT, MIKONO, Kwanza Collection, AMKA) raised a number of issues that, in their experiences, have prevented them from becoming attractive to an international market: Lack of consistent quality in the raw materials (such as yarns, dyes and chemicals) used to make the products with, suggesting that the Government ought to lobby the raw material manufacturers to produce to a certain quality or to set up factories of their own: the yarns do not produce fabric to the required standards of the international market and the pigment dyes often fade in the wash. Need for adequate preparation for exhibiting at the large international shows Lack of access to current standards of technology The second hand clothing market has an impact on the local designers and needs some form of intervention from the government. There are restricted employment prospects in textile design in the industrial sector (mainly in the Export Processing Zone) The companies are allowed to employ a certain number of people from outside of Tanzania; these invariably include the designers. Reasons for not employing local designers include: Local designers had received no formal industrial sewing techniques or design training so large companies had no confidence in employing them in the design function The large factories train local employees as operators but not design. The design departments often used computer aided design, a tool not found in the small scale sector or short term courses or training centres. Retail buyers ordered staple items (such as bed sheets or uniforms) not fashion (trend led) from large industrial companies so designs requirements were for amendments rather than brand new designs.
Efecto de un programa de Hatha Yoga en pacientes con enfermedad de Alzheimer (EA)
Year: 2017

This study assessed the effect of a Hatha yoga program in 20 men and 41 women diagnosed with Alzheimer's Disease (AD) who showed mild (36% and moderate (64 global cognitive decline and whose average age was 76,9 years old (SD=11,7) The design was quasi experimental of repeated measures (pre, post and follow up) The instruments applied were: Alzheimer's Disease Related Quality of Life Scale (ADRQL) Questionnaire of Quality of Life (QQL) Geriatric Depression Scale (YESAVAGE) Mini Mental State Examination (MMSE) memory and processing speed sub scales of WAIS III test, Trail Making Test (TMT A) Lawton and Brody Test; and Barthel Test. The yoga program consisted of 32 one hour sessions twice a week Data analysis was conducted using 35 patients who participated throughout the whole study. The post treatment mean showed a positive improvement tendency in quality of life and attention. However, during the follow up, these variables mean value was equal to, or even lower, than the one established in the pre treatment. The repeated measures ANOVA results showed that no significant change occurred between measurements. The content analysis of eight focus groups suggests that, from the perspective of patients and caregivers, positive changes were observed in patients' mood, attention, episodic and procedural memory, and functionality. More studies are necessary with a higher number of patients and sessions per week, as well as a control group, whose function would be to increase validity of the results obtained.
High Efficiency High Bandwidth Four Quadrant Fully Digitally Controlled GaN Based Tracking Power Supply System for Linear Power Amplifiers
Venue: IEEE Journal of Emerging and Selected Topics in Power Electronics
Year: 2019

The ever rising demands for a high efficiency and high power density in the power electronics market are motivating an intensive research in the area of wide bandgap (WBG) devices, with enhancement mode gallium nitride (GaN) high electron mobility transistors as the main representatives. Compared to the conventional silicon devices with the same voltage rating and ON state resistance, the parasitic capacitances of GaN transistors are smaller up to 10 times. Although their turn off energy is very small, for the high switching speeds, zero voltage switching is preferable to avoid the turn on power losses, especially in the application where the devices operate at megahertz switching frequencies and where the blocking voltages are high. This is also very important from the thermal point of view, due to the poor junction to ambient thermal impedance of the packaging, in order to avoid high junction temperatures. Moreover, for a successful design of a power converter, the magnetic materials optimized for the high frequency range are a must, with a manganese zinc ferrites as the most promising solution. In this paper, an 8 W, 1 MHz switching frequency fully digitally controllable bipolar tracking power supply with a 100 kHz small signal bandwidth, the tracking speeds up to $2~\text {V/ \mu \text {s} and the maximum efficiency beyond 94% is shown, where a symbiosis of WBG devices and the newest generation high frequency magnetic materials manifests the clear benefits.
Improving Cross lingual Entity Alignment via Optimal Transport
Venue: IJCAI
Year: 2019

Cross lingual entity alignment identifies entity pairs that share the same meanings but locate in different language knowledge graphs (KGs) The study in this paper is to address two limitations that widely exist in current solutions: 1) the alignment loss functions defined at the entity level serve well the purpose of aligning labeled entities but fail to match the whole picture of labeled and unlabeled entities in different KGs; 2) the translation from one domain to the other has been considered (e.g. X to Y by M1 or Y to X by M2) However, the important duality of alignment between different KGs (X to Y by M1 and Y to X by M2) is ignored. We propose a novel entity alignment framework (OTEA) which dually optimizes the entity level loss and group level loss via optimal transport theory. We also impose a regularizer on the dual translation matrices to mitigate the effect of noise during transformation. Extensive experimental results show that our model consistently outperforms the state of the arts with significant improvements on alignment accuracy.
Implicit and explicit integration in the solution of the absolute nodal coordinate differential/algebraic equations
Year: 2008

This investigation is concerned with the use of an implicit integration method with adjustable numerical damping properties in the simulation of flexible multibody systems. The flexible bodies in the system are modeled using the finite element absolute nodal coordinate formulation (ANCF) which can be used in the simulation of large deformations and rotations of flexible bodies. This formulation, when used with the general continuum mechanics theory, leads to displacement modes, such as Poisson modes, that couple the cross section deformations, and bending and extension of structural elements such as beams. While these modes can be significant in the case of large deformations, and they have no significant effect on the CPU time for very flexible bodies; in the case of thin and stiff structures, the ANCF coupled deformation modes can be associated with very high frequencies that can be a source of numerical problems when explicit integration methods are used. The implicit integration method used in this investigation is the Hilber Hughes Taylor method applied in the context of Index 3 differential algebraic equations (HHT I3) The results obtained using this integration method are compared with the results obtained using an explicit Adams predictor corrector method, which has no adjustable numerical damping. Numerical examples that include bodies with different degrees of flexibility are solved in order to examine the performance of the HHT I3 implicit integration method when the finite element absolute nodal coordinate formulation is used. The results obtained in this study show that for very flexible structures there is no significant difference in accuracy and CPU time between the solutions obtained using the implicit and explicit integrators. As the stiffness increases, the effect of some ANCF coupled deformation modes becomes more significant, leading to a stiff system of equations. The resulting high frequencies are filtered out when the HHT I3 integrator is used due to its numerical damping properties. The results of this study also show that the CPU time associated with the HHT I3 integrator does not change significantly when the stiffness of the bodies increases, while in the case of the explicit Adams method the CPU time increases exponentially. The fundamental differences between the solution procedures used with the implicit and explicit integrations are also discussed in this paper.
On the Performance of Cell Free Massive MIMO With Mixed ADC Under Rician Fading Channels
Venue: IEEE Communications Letters
Year: 2020

In this letter, we introduce a mixed analog to digital converter (ADC) receiver architecture to cell free massive multi input multi output (mMIMO) system under Rician fading channels. In particular, the mixed ADC architecture permits some of receiver's antennas to be implemented with economical low resolution ADCs, while the rests are equipped with high priced perfect ADCs. Leveraging on the additive quantization noise model (AQNM) a tight approximate uplink spectral efficiency (SE) expression with matched filtering receiver is derived, which provides us with a tool for easily quantifying the impacts of the Rician {K} factor, the quantization bit of low resolution ADCs, and the proportion of the perfect ADCs in the mixed ADC architecture. Numerical observations demonstrate that the mixed ADC architecture with a small fraction of perfect ADCs has a great potential to boost the SE compared to the case with pure low resolution ADCs. Moreover, the mixed ADC architecture is superior to the full perfect ADCs counterpart in terms of energy efficiency (EE)
Neutron activation analysis for chemical characterization of Brazilian oxo biodegradable plastics
Venue: Journal of Radioanalytical and Nuclear Chemistry
Year: 2014

The chemical characterization of oxo biodegradable plastic bags was performed by neutron activation analysis. The presence of several chemical elements (As, Br, Ca, Co, Cr, Fe, Hf, K, La, Na, Sb, Sc, Ta and Zn) with large variability of mass fractions amongst samples indicates that these plastics receive additives and may have been contaminated during manufacturing process thereby becoming potential environmental pollutants.
Cutting nature to fit: Urbanization, neoliberalism and biodiversity offsetting in England
Year: 2017

In this paper, by drawing on primary empirical data obtained through 62 interviews in seven case studies we seek to offer a Marxist historical geographical analysis of biodiversity offsetting policy in England, and its emergence in the context of the global economic crisis, and government aspirations for large scale urban development projects. By paying attention to the interplay between offsetting, urbanization and the neoliberal reconstruction of conservation, we aim to extend the focus of the neoliberal conservation literature from the role of offsets as ecological 'commodities' to the way offsetting is used to support the production of space(s) place(s) and nature(s) in line with contemporary patterns of capitalist urban growth. In particular, we show how offsetting operationalized new ideas about nature as a stock of biodiversity, how it streamlined planning to support extended urbanization, how it foreclosed public debate about controversial urban development projects, and how it reterritorialized nature society relationships. We also give a central role to social contestation against the implementation of offsetting in England, drawing attention to its class character and highlighting the potential for a new emancipatory politics that would encompass a 'right to nature' as a key element of struggles for the 'right to the city'
O TEMPO DE PRATICA E A PRATICA DE OUTRO EXERCICIO FISICO INFLUENCIAM NA APTIDAO FISICA DE IDOSOS PRATICANTES DO METODO PILATES?
Year: 2020

Verificar se o tempo de pratica no Pilates e a pratica adicional de outro exercicio fisico influenciam na aptidao fisica de idosos praticantes de Pilates.  O estudo transversal foi composto por 60 idosos praticantes de Pilates de estudios e academias da cidade de Maringa Parana, Brasil em 2019. Todas as analises foram realizadas nas proprias academias, sendo as variaveis sociodemograficas analisadas por meio de um questionario semiestruturado e as capacidades fisicas aferidas pela bateria Senior Fitness Test. As analises de dados foram conduzidas por meio da Anova One Way e do teste t de student independente (p 0,05) RESULTADOS: Idosos que praticam o Pilates ha mais de tres anos apresentaram melhor desempenho no teste de alcancar atras das costas (x 4,96) em comparacao aos idosos que praticam a modalidade entre tres e 12 meses (x= 14,43 cm) Ainda, os idosos que praticam apenas o Pilates apresentaram aptidao fisica semelhante aos idosos que tambem praticam outro exercicio.  Nao houve diferencas significantes entre quem pratica outro tipo de exercicio fisico associado ao Pilates nos diferentes componentes da aptidao fisica. Porem, o maior volume total de tempo de pratica do Pilates, aparentemente, proporciona melhores resultados sobre a flexibilidade de membros superiores de idosos.
Detailed studies of {100}$100Mo two neutrino double beta decay in NEMO 3
Venue: The European Physical Journal C
Year: 2019

The full data set of the NEMO 3 experiment has been used to measure the half life of the two neutrino double beta decay of {100}$100Mo to the ground state of {100}$100Ru, $T_{1/2} \left[ 6.81 \pm 0.01\\left( \text{ stat \right) +0.38}_{ 0.40}\left( \text{ syst \right) \right] \times 10^{18}$T1/2=6.81+ 0.01stat 0.40+0.38systx1018 year. The two electron energy sum, single electron energy spectra and distribution of the angle between the electrons are presented with an unprecedented statistics of $5\times 10^5$$5x105 events and a signal to background ratio of \sim 80. Clear evidence for the Single State Dominance model is found for this nuclear transition. Limits on Majoron emitting neutrinoless double beta decay modes with spectral indices of \mathrm{n}=2,3,7$$n=2,3,7, as well as constraints on Lorentz invariance violation and on the bosonic neutrino contribution to the two neutrino double beta decay mode are obtained.
Inflexibilidad psicologica e impacto clinico: adaptacion del Cuestionario de Aceptacion y Accion II en una muestra de pacientes en tratamiento de hemodialisis
Year: 2020

Resumen Antecedentes y objetivos Apenas existen estudios que hayan investigado el papel que la inflexibilidad psicologica (IP) pudiera tener en el contexto de la IRC. El objetivo primario de este estudio fue analizar las propiedades psicometricas, la fiabilidad y la validez de la version espanola del Acceptance and Action Questionnaire II adaptada al contexto de pacientes en tratamiento de hemodialisis. El objetivo secundario fue analizar la relacion entre IP y parametros relacionados con la adhesion al tratamiento y calidad de vida en este tipo de pacientes. Materiales y metodos Estudio transversal prospectivo con pacientes en hemodialisis (n 186) Resultados El indice de tejido graso (15,56 5,72 vs. 18,99 8,91; p 0,033) los niveles de fosforo (3,92 1,24 vs. 4,66 1,38; p 0,001) y la ganancia de peso interdialisis (1,56 0,69 vs. 1,89 0,93; p 0,016) fueron mayores en los pacientes con mas puntuacion en IP. Los niveles de fosforo (p 0,013) explicaron de forma significativa la variabilidad de los niveles de IP, la cual tambien se mostro como un predictor significativo (p 0,026) de la variabilidad de los niveles de fosforo. Conclusiones La adaptacion del cuestionario Acceptance and Action Questionnaire II al contexto de hemodialisis da lugar a una medida valida y fiable de la IP para este tipo de pacientes, y los resultados de este estudio parecen apoyar el papel de la IP con relacion a parametros de salud y calidad de vida en el ambito de las enfermedades cronicas.