Nonlinear height–diameter models for three woody, understory species in a temperate oak forest in Hungary

Information about the diameter and the height of woody species is fundamental to developing growth and yield models in forest stands. Ten non-linear height-diameter functions were fitted and evaluated for the site. The data set consisted of 957 selected individuals of three dominant woody species (Acer campestre L., Acer tataricum L., and Cornus mas L.), and represented a wide range of woody species sizes. Changes in these equations following dieback of oak canopies were analysed. Residual standard error (RSE) results of the two-parameter functions showed that the "Wykoff et al. 1982" and "Bates and Watts 1980–Ratkowsky 1990" functions had lower RSE values in 1972. After oak decline the "Larson 1986" and "Bates and Watts 1980–Ratkowsky 1990" functions had lower values. The RSE data for the three-parameter functions showed that the "Pearl and Reed 1920" function had fitted RSE values at the start of the long-term study. After canopy decline function, the "Ratkowsky 1990" function RSE value was lowest for A. campestre and C. mas. "Pearl and Reed 1920" was the best-fitted function for A. tataricum. Height–diameter equations increase our knowledge about the growth of these species, which will enable us to improve management planning in oak forests.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Team attributes and performance of operational service teams: An empirical taxonomy development

Teams have been regarded as an integral element of a number of operations management (OM) strategies and many of their related concepts such as group dynamics and people issues are considered important for knowledge of behavioral operations. In practice, the management of operational service teams is challenging for OM managers because of its potential problems such as unstructured tasks and negative member behavior. In this study, operational service teams' attribute patterns and their associated performance levels were examined using a configuration approach. Based on the data collected from 201 operational service teams in Hong Kong and Macao (China), an empirical taxonomy was developed, comprising team attributes including team use, organizational support, clear goals, collaborative climate, coercive influence and adaptation difficulty. The taxonomy indicated that there were three attribute patterns among the sample teams. The analyzed results indicated that the sample teams of different attribute patterns achieved markedly different levels of team performance. The study contributes to the literature by providing empirical evidence that team attributes and their combined patterns are determinants of operational service teams' performance. It also contributes to practitioners by reporting the current status of operational service team management and offering guidelines on enhancement of team performance.Department of Logistics and Maritime Studie

The relationships among leadership, goal orientation, and service quality in high-contact service industries: An empirical study

High-contact service industries are characterized by close interaction between service employees and customers, and diverse customer needs. Such characteristics pose a great challenge to the delivery of services of superior quality. In this research we conceptually explore and empirically examine several attitudinal and motivational factors of customer-contact employees, and the management style of managers as antecedents to service quality in high-contact service sectors. Based on dyadic data collected from 230 service firms in Hong Kong, we examine the relationships among transformational leadership, transactional leadership, affective organizational commitment, learning goal orientation, performance goal orientation, and service quality. We find that learning goal orientation is more effective than performance goal orientation in fostering service quality in the high-contact service context. We also observe that transformational leadership tends to be more effective than transactional leadership in influencing employee attitude in high-contact service firms. This research pioneers theory-driven examination of service quality in high-contact service firms using data collected from service employees and shop managers for hypothesis testing.Department of Logistics and Maritime Studie

Euclid. III. The NISP Instrument

International audienceThe Near-Infrared Spectrometer and Photometer (NISP) on board the Euclid satellite provides multiband photometry and R>=450 slitless grism spectroscopy in the 950-2020nm wavelength range. In this reference article we illuminate the background of NISP's functional and calibration requirements, describe the instrument's integral components, and provide all its key properties. We also sketch the processes needed to understand how NISP operates and is calibrated, and its technical potentials and limitations. Links to articles providing more details and technical background are included. NISP's 16 HAWAII-2RG (H2RG) detectors with a plate scale of 0.3" pix^-1 deliver a field-of-view of 0.57deg^2. In photo mode, NISP reaches a limiting magnitude of ~24.5AB mag in three photometric exposures of about 100s exposure time, for point sources and with a signal-to-noise ratio (SNR) of 5. For spectroscopy, NISP's point-source sensitivity is a SNR = 3.5 detection of an emission line with flux ~2x10^-16erg/s/cm^2 integrated over two resolution elements of 13.4A, in 3x560s grism exposures at 1.6 mu (redshifted Ha). Our calibration includes on-ground and in-flight characterisation and monitoring of detector baseline, dark current, non-linearity, and sensitivity, to guarantee a relative photometric accuracy of better than 1.5%, and relative spectrophotometry to better than 0.7%. The wavelength calibration must be better than 5A. NISP is the state-of-the-art instrument in the NIR for all science beyond small areas available from HST and JWST - and an enormous advance due to its combination of field size and high throughput of telescope and instrument. During Euclid's 6-year survey covering 14000 deg^2 of extragalactic sky, NISP will be the backbone for determining distances of more than a billion galaxies. Its NIR data will become a rich reference imaging and spectroscopy data set for the coming decades

Euclid. III. The NISP Instrument

International audienceThe Near-Infrared Spectrometer and Photometer (NISP) on board the Euclid satellite provides multiband photometry and R>=450 slitless grism spectroscopy in the 950-2020nm wavelength range. In this reference article we illuminate the background of NISP's functional and calibration requirements, describe the instrument's integral components, and provide all its key properties. We also sketch the processes needed to understand how NISP operates and is calibrated, and its technical potentials and limitations. Links to articles providing more details and technical background are included. NISP's 16 HAWAII-2RG (H2RG) detectors with a plate scale of 0.3" pix^-1 deliver a field-of-view of 0.57deg^2. In photo mode, NISP reaches a limiting magnitude of ~24.5AB mag in three photometric exposures of about 100s exposure time, for point sources and with a signal-to-noise ratio (SNR) of 5. For spectroscopy, NISP's point-source sensitivity is a SNR = 3.5 detection of an emission line with flux ~2x10^-16erg/s/cm^2 integrated over two resolution elements of 13.4A, in 3x560s grism exposures at 1.6 mu (redshifted Ha). Our calibration includes on-ground and in-flight characterisation and monitoring of detector baseline, dark current, non-linearity, and sensitivity, to guarantee a relative photometric accuracy of better than 1.5%, and relative spectrophotometry to better than 0.7%. The wavelength calibration must be better than 5A. NISP is the state-of-the-art instrument in the NIR for all science beyond small areas available from HST and JWST - and an enormous advance due to its combination of field size and high throughput of telescope and instrument. During Euclid's 6-year survey covering 14000 deg^2 of extragalactic sky, NISP will be the backbone for determining distances of more than a billion galaxies. Its NIR data will become a rich reference imaging and spectroscopy data set for the coming decades

Euclid. I. Overview of the Euclid mission

The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Euclid is a medium-class mission in the Cosmic Vision 2015-2025 programme of the European Space Agency (ESA) that will provide high-resolution optical imaging, as well as near-infrared imaging and spectroscopy, over about 14,000 deg^2 of extragalactic sky. In addition to accurate weak lensing and clustering measurements that probe structure formation over half of the age of the Universe, its primary probes for cosmology, these exquisite data will enable a wide range of science. This paper provides a high-level overview of the mission, summarising the survey characteristics, the various data-processing steps, and data products. We also highlight the main science objectives and expected performance