排序方式: 共有39条查询结果,搜索用时 296 毫秒
1.
Johan F. Hoorn 《Cognition, Technology & Work》2008,10(4):249-249
2.
3.
4.
Neural network identification of poets using letter sequences 总被引:1,自引:0,他引:1
Hoorn JF; Frank SL; Kowalczyk W; van der Ham F 《Literary and Linguistic Computing》1999,14(3):311-338
5.
Piet Rietveld Bert Zwart Bert van Wee Toon van den Hoorn 《The Annals of Regional Science》1999,33(3):269-287
This paper gives a detailed empirical analysis of the relationships between different indicators of costs of commuting trips
by car: difference as the crow flies, shortest travel time according to route planner, corresponding travel distance, and
reported travel time. Reported travel times are usually rounded in multiples of five minutes. This calls for special statistical
techniques. Ignoring the phenomenon of rounding leads to biased estimation results for shorter distances. Rather surprisingly,
the distance as the crow flies and the network distance appear to be slightly better proxies of the reported travel time compared
with the shortest network travel time as indicated by the route planner. We conclude that where actual driving times are missing
in commuting research the other three indicators mentioned may be used as proxies, but that the following problems may emerge:
actual travel times may be considerably higher than network times generated by route planners, and the average speed of trips
increases considerably with distance, implying an overestimate of travel time for long distance commuters. The only personal
feature that contributes significantly to variations in reported travel times is gender: women appear to drive at lower average
speeds according to our data. As indicated in the paper this may be explained by the differences in the car types of male
and female drivers (females drive older and smaller cars) as well as higher numbers of stops/trip chaining among women. A
concise analysis is carried out for carpoolers. Car-pooling leads to an increase in travel time of some 17% compared with
solo drivers covering the same distance. In the case of car poolers, the above mentioned measures appear to be very poor proxies
for the actual commuting times.
Received: November 1996/Accepted: January 1998 相似文献
6.
7.
For the M/G/c queue we present an approximate analysis of the waiting time distribution. The result is given in the form of the defective renewal equation. This integral equation can be numerically solved by a simple recursion procedure. Also, asymptotic results for the waiting times are presented. Numerical results indicate that the approximations are sufficiently accurate for practical purposes. 相似文献
8.
Describes the La Isla Pacifica, a shelter serving women who have fled a violent partner. The shelter is open to all women, but it differs from many of its counterparts because it is designed to be a good cultural and linguistic fit for Spanish-speaking women of Mexican descent. The article outlines (1) program structure, (2) program services, (3) program staffing, (4) orienting ideas/mission statement, and (5) recommendations. A profile of 424 battered Mexican American women who used the shelter from 1979 to 1994 is presented. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
9.
Kibrom B. Abreha Erik Alexandersson Svante Resj sa Lankinen Daniela Sueldo Farnusch Kaschani Markus Kaiser Renier A. L. van der Hoorn Fredrik Levander Erik Andreasson 《International journal of molecular sciences》2021,22(21)
Multiple biotic and abiotic stresses challenge plants growing in agricultural fields. Most molecular studies have aimed to understand plant responses to challenges under controlled conditions. However, studies on field-grown plants are scarce, limiting application of the findings in agricultural conditions. In this study, we investigated the composition of apoplastic proteomes of potato cultivar Bintje grown under field conditions, i.e., two field sites in June–August across two years and fungicide treated and untreated, using quantitative proteomics, as well as its activity using activity-based protein profiling (ABPP). Samples were clustered and some proteins showed significant intensity and activity differences, based on their field site and sampling time (June–August), indicating differential regulation of certain proteins in response to environmental or developmental factors. Peroxidases, class II chitinases, pectinesterases, and osmotins were among the proteins more abundant later in the growing season (July–August) as compared to early in the season (June). We did not detect significant differences between fungicide Shirlan treated and untreated field samples in two growing seasons. Using ABPP, we showed differential activity of serine hydrolases and β-glycosidases under greenhouse and field conditions and across a growing season. Furthermore, the activity of serine hydrolases and β-glycosidases, including proteins related to biotic stress tolerance, decreased as the season progressed. The generated proteomics data would facilitate further studies aiming at understanding mechanisms of molecular plant physiology in agricultural fields and help applying effective strategies to mitigate biotic and abiotic stresses. 相似文献
10.
Thijs W. de Vos Dian Winkelhorst Hans J. Baelde Kyra L. Dijkstra Rianne D. M. van Bergen Lotte E. van der Meeren Peter G. J. Nikkels Leendert Porcelijn C. Ellen van der Schoot Gestur Vidarsson Michael Eikmans Rick Kapur Carin van der Keur Leendert A. Trouw Dick Oepkes Enrico Lopriore Marie-Louise P. van der Hoorn Manon Bos Masja de Haas 《International journal of molecular sciences》2021,22(13)
Fetal and neonatal alloimmune thrombocytopenia (FNAIT) is a disease that causes thrombocytopenia and a risk of bleeding in the (unborn) child that result from maternal alloantibodies directed against fetal, paternally inherited, human platelet antigens (HPA). It is hypothesized that these alloantibodies can also bind to the placenta, causing placental damage. This study aims to explore signs of antibody-mediated placental damage in FNAIT. We performed a retrospective study that included pregnant women, their newborns, and placentas. It comprised 23 FNAIT cases, of which nine were newly diagnosed (14 samples) and 14 were antenatally treated with intravenous immune globulins (IVIg) (21 samples), and 20 controls, of which 10 had anti-HLA-class I antibodies. Clinical information was collected from medical records. Placental samples were stained for complement activation markers (C1q, C4d, SC5b-9, and mannose-binding lectin) using immunohistochemistry. Histopathology was examined according to the Amsterdam criteria. A higher degree of C4d deposition was present in the newly diagnosed FNAIT cases (10/14 samples), as compared to the IVIg-treated FNAIT cases (2/21 samples, p = 0.002) and anti-HLA-negative controls (3/20 samples, p = 0.006). A histopathological examination showed delayed maturation in four (44%) placentas in the newly diagnosed FNAIT cases, five (36%) in the IVIg-treated FNAIT cases, and one in the controls (NS). C4d deposition at the syncytiotrophoblast was present in combination with low-grade villitis of unknown etiology in three newly diagnosed FNAIT cases that were born SGA. We conclude that a higher degree of classical pathway-induced complement activation is present in placentas from pregnancies with untreated FNAIT. This may affect placental function and fetal growth. 相似文献