6,325 research outputs found
Estimation of an indicator of the representativeness of survey response
No full textNonresponse is a major source of estimation error in sample surveys. The response rate is widely used to measure the quality of a sample survey associated with nonresponse. It is, however, inadequate as an indicator because of its limited relation with nonresponse bias. Schouten et al. (2009) proposed an alternative indicator, which they refer to as an indicator of representativeness or R-indicator. This indicator measures the variability of the probabilities of response for units in the population. This paper develops methods for the estimation of this R-indicator assuming that values of a set of auxiliary variables are observed for both respondents and nonrespondents. In particular, we consider the bias of point estimators proposed by Schouten et al. (2009) and propose bias adjustments and linearization variance estimators. The proposed procedures are evaluated in a simulation study and their use is illustrated in an application to two business surveys at Statistics Netherlands
Jovrnal ou description dv merveillevx voyage de Gvillavme Schovten [i.e., Journal ou description du merveilleux voyage de Guillaume Schouten], hollandois natif de Hoorn, fait es annees 1615, 1616, & 1617...
No full text"Comme (en circum-navigeant le globe terrestre) il a descouvert vers le Zud du destroit de Magellan un nouveau passage, jusques a la grande Mer de Zud. Ensemble, des avantures admirables qui luy sont advenues en descouvrant de plusieurs isles, & peuples estranges" - t.-p.; Engraved t.-p.; Translation of: "Journal ofte beschryvinghe van de wonderlicke reyse, ghedaen door Willem Cornelisz Schouten van Hoorn inde jaren 1615, 1616, en 1617", first published Amsterdam 1618, and generally referred to as Schouten's journal, the author being unknown.; In French.; Electronic reproduction. Canberra, A.C.T. : National Library of Australia, 2010.; On front end-piece: "Bound by W. Pratt for H. Stevens, 1868. "; M139746.Journal ofte beschryvinghe van de wonderlicke reyse. French. 161
Bibliotheca selectissima, sive, Catalogus librorum, plurimum rarissimorum in omnibus facultatibus scientiis ac linguis : in quibus excellunt, variae exquisitae collectiones ... = Een uitgezochte bibliotheeck van de allerrarste boecken : in allerhande faculteiten, wetenschappenen taalen, waar in uytmunten eenige ongemeene verzaamelingen ...
No full textConsignor: Isaäc le Long."Quae omnes magno studio, labore & impensis per 50 annos continuos comparatae, auctione publica vendentur Amstelaedami, die Lunae 17 Augusti & seqq. 1744 apud Salomonem Schouten, bibliopolam in platea vulgo dicta de Kalverstraat."Signatures: pi⁶(-pi2) A-L⁸ M² (A)-(Q)⁸ (R)⁶(-(R)6) a-b⁸ c⁴.Blogie,Date of sale: Aug. 17, 1744, and days following.Place of sale: Amsterdam.Mode of access: Internet.Library's copy has a few annotations; bound in old marbled paper over boards; leather back and corners; gilt spine; sprinkled edges. Binder's title: Bibliotheek van Jsaac le Long
Metaeuchromius inflatus Schouten 1997
No full textMetaeuchromius inflatus Schouten, 1997 (Fig. 3) Metaeuchromius inflatus Schouten, 1997: 119, figs. 9, 22, 28. Materials examined. CHINA: 2 3, Bubang, Mengla (21 ° 29´N, 101 ° 33´E), Yunnan Province, 650 m, 22.– 23.viii. 2005, leg. Yingdang Ren; 1 3, Wenquan (24 ° 59´N, 102 ° 27´E), Kunming, Yunnan Province, 1900 m, 29.viii. 2005, leg. Yingdang Ren; 7 3, Menglun Tropical Botanical Garden, Menglun (21 ° 55´N, 101 ° 13´E), Yunnan Province, 570 m, 15.viii. 2005, leg. Yingdang Ren; 48 3, 5 ♀♀, Ruili Rare Bontanical Garden, Ruili (24 °00´N, 97 ° 50´E), Yunnan Province, 1000 m, 5–8.viii. 2005, leg. Yingdang Ren. Description. Adult (Fig. 3): Wingspan 11.0–15.0 mm. Distribution. China (Yunnan), Nepal. Remarks. Schouten (1997) described this species in detail. This species is new to China.Published as part of Li, Weichun, Li, Houhun & Nuss, Matthias, 2009, Notes on the genus Metaeuchromius Bleszynski (Lepidoptera: Crambidae: Crambinae) from China, with description of two new species, pp. 55-63 in Zootaxa 2287 on page 61, DOI: 10.5281/zenodo.27528
M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society
No full textRobinne François. M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society. In: L'Homme, 1999, tome 39 n°152. Esclaves et « sauvages ». pp. 250-251
M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society
No full textRobinne François. M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society. In: L'Homme, 1999, tome 39 n°152. Esclaves et « sauvages ». pp. 250-251
Integrating a biological neural network into a musculoskeletal model to analyse postural control reflex modulation
No full textThe neuromusculoskeletal model of this study was built to better understand the mechanisms behind negative position and velocity feedback gains as identified in human postural control (Van der Helm et al.,2002). Specifically, causes were sought which could explain: a) why Reflex Sympathetic Dystrophy (RSD) patients with tonic dystonia are unable to set negative gains (Schouten et al., 2003) when optimal posture control dictates these gains as desirable (Schouten et al.,2001; De Vlugt et al., 2001), and b) how these patients are still able to modulate the gains, although restricted to positive values (Schouten et al., 2003). The model is an integration of a biological realistic neural network based on Bashor (1998) with a 1-degree of freedom musculoskeletal model derived from human shoulder studies (Stroeve, 1999; Van der Helm et al., 2002; Schouten et al., 2003). Muscle proprioceptors obtained from comparative studies (Prochazka and Gorassini, 1998a,b) provide the neural network with feedback information from the musculoskeletal model. It has been suggested that the inability to set negative gains is due to neurotransmitter deficiencies in inhibiting synapses in the spinal neural network (Van Hilten et al., 2000; Jankowska and Hammar, 2002). Two synaptic connections were selected for possible disfunctioning: 1) the synapse which presynaptically inhibits the monosynaptic stretch reflex synapse, and 2) the synapse connecting the inhibitory interneuron to the motoneuron. A lack of presynaptic inhibition of the first resulted in an overly dominant monosynaptic stretch reflex with high, positive feedback gains. Disabling the second prevented several major proprioceptive feedback paths from providing the motoneurons with with negative stimulation, making the setting of negative feedback gains next to impossible. It was concluded that: a) both synapses play an important role in obtaining negative feedback gains and that disfunctioning of these synapses could account for the previously unexplainable feedback gain quantification results for healthy subjects and RSD patients, and b) a disabled synapse, other than the one presynaptically inhibiting the monosynaptic stretch reflex synapse, still allows for limited feedback gain modulation.Biomechanical EngineeringMechanical, Maritime and Materials Engineerin
Globalizing L-infinity automorphisms of the Schouten algebra of polyvector fields
No full textRecently, Willwacher showed that the Grothendieck-Teichmuller group GRT acts by L-infinity-automorphisms on the Schouten algebra of polyvector fields T_poly(R^d) on affine space R^d. In this article, we prove that a large class of L-infinity-automorphisms on the Schouten algebra, including Willwacher's, can be globalized. That is, given an L-infinity-automorphism of T_poly(R^d) and a general smooth manifold M with the choice of a torsion-free connection, we give an explicit construction of an L-infinity-automorphism of the Schouten algebra T_poly(M) on the manifold M, depending on the chosen connection. The method we use is the Fedosov trick.</p
Indicators for monitoring and improving representativeness of response
No full textThe increasing efforts and costs required to achieve survey response have led to a stronger focus on survey data collection monitoring by means of paradata and to the rise of adaptive and responsive survey designs. Indicators that support data collection monitoring, targeting and prioritizing in such designs are not yet available. Subgroup response rates come closest but do not account for subgroup size, are univariate and are not available at the variable level.We present and investigate indicators that support data collection monitoring and effective decisions in adaptive and responsive survey designs. As they are natural extensions of R-indicators, they are termed partial R-indicators. We make a distinction between unconditional and conditional partial R-indicators. Conditional partial R-indicators provide a multivariate assessment of the impact of register data and paradata variables on representativeness of response.We propose methods for estimating partial indicators and investigate their sampling properties in a simulation study.. The use of partial indicators for monitoring and targeting nonresponse is illustrated for both a a household and business survey. Guidelines for the use of the indicators are given.<br/
Exchange rates and the European business cycle: An application of a quasi-empirical two-country model.
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