Transport and the Greenhouse Effect

To date, 84 nations have signed the so-called Kyoto Protocol on the control of Greenhouse Gas (GHG) emissions. In the Netherlands the Kyoto agreement has resulted in quantitative national targets for 2008-2012 of -6% GHG emission reduction compared to 1990; this is a reduction of 19% compared to the emission forecasted for 2010. Two years ago the Dutch government launched a policy-making process for meeting the Kyoto target. In both the development and the evaluation of Dutch Kyoto-related policy, research has played a major role. For the transport sector no (a priori) targets were set; however, a list of measures and instruments to reduce transport GHG emissions were discussed in the Kyoto-related policymaking process. Nearly all transport instruments and measures on this list appeared to be car-related. The reason for this focus was an a priori choice of policymakers. However, costeffective options for other vehicle categories (road and non-road transport) may be available. The transport options finally chosen for the Policy document will reduce GHG emissions from transport by 3-5% compared to the forecasted 2010 emissions. Researchers estimated that tax differentiation for new cars and in-car instruments such as fuel economy meters and cruise control will be the most effective instruments. The selected transport measures were not really chosen to induce a technology push; rather, the selection was mainly policy driven to meet short-term targets. Although research played a significant role in the policy-making process, several research improvements can still be made. Important improvements identified are: a) using a better and clearer method for the calculation of the costs of the measures and b) using a broader evaluation method of measures; this will mean including more environmental, economic and social indicators

Employer Attitudes towards Peak Hour Avoidance

Peak Hour Avoidance is a relatively new Dutch mobility management measure. To reduce congestion frequent car drivers are given a financial reward for reducing the proportion of trips that they make during peak hours on a specific motorway section. Although previous studies show that employers are not eager to support mobility management measures, employers are nevertheless an important stakeholder. They can provide their employees with alternatives such as other travel times, work locations or travel modes and encourage their use. This paper investigates the attitudes of Dutch employers towards Peak Hour Avoidance. Exploring the factors that influence these attitudes may help to fully utilise employer support. The data from 103 employers were collected through a web questionnaire. A structural equation model on the employer support for Peak Hour Avoidance was estimated. The results demonstrate that the size of the organisation and sector only have an indirect effect on the support for Peak Hour Avoidance. Results reveal that most support for Peak Hour Avoidance can be expected from organisations who feel responsible for influencing the commuting behaviour of employees, that have human resource managers with a positive attitude towards Peak Hour Avoidance, with flexible working times and that have already implemented mobility management measures. The largest contribution to PHA that can be expected from employers is providing employees with flexible working times and encouraging employees to fully utilise this option as an alternative for driving in peak hours. This would not only be beneficial for PHA but for a wide range of mobility management initiatives as well

The effects of weather and climate change on cycling in northern Norway

Weather is identified as one of many factors that influence the demand for cycling. Weather patterns will change due to expected climate change. The aim of this article is to study the extent to which climate change influences the cycling frequency. The analysis in this article is conducted using an econometric model based on data spanning over four years on weather indicators and the cycling frequency in the Norwegian city of Bodø, which is located north of the Arctic Circle. According to the projections for climate change, both temperature and quantity of precipitation are expected to increase in this area during the next century. An important consequence of changes in the climate in the studied region is the reduced duration of what can be characterised as the winter season. However, this consequence is highly uncertain. When using Norway’s middle projections for climate change by 2050, the analysis shows a moderate increase in cycling frequency of 6.2%. For the reduced winter period, the cycle rate might be two and three times higher in 2050 compared to the current level. Both estimates assume that every other potential impact on cycling rates remain equal

Non-implementation of road pricing policy in the Netherlands: An application of the ‘Advocacy Coalition Framework’

The implementation of road pricing policies is dependent on political support for the policy. It is frequently argued that many pricing proposals fail to be implemented due to the opposition of one or a group of policy actors (e.g. political parties, interest groups). This study considers this issue and examines the reasons for non-implementation of proposals for Dutch road pricing policies by analysing the policy position changes of 26 major policy actors and the changes in consensus and conflict among these actors over a policy process of 16 years. The “Advocacy Coalition Framework” (ACF) is used as the theoretical lens. Our findings show that in the Netherlands non-implementation cannot be ascribed to only the opposition of one policy actor or to one group of policy actors, but rather to features of the Dutch political system/culture and complications peculiar to the road pricing subsystem (socio-cultural values related to mobility, complex design issues). We found that internal and external shocks, and policy-oriented learning affected the subsystem and alerted the power balance between pro-and anti-road pricing coalitions. However, these factors did not produce a major policy change, namely, the introduction of a road pricing scheme

Towards improved handling of uncertainty in cost-benefit analysis: addressing the ‘price-quality’ and ‘communication’ dilemmas

An important limitation of Cost-Benefit Analysis (CBA) is the inherent uncertainty in estimations of future welfare effects. In this paper, we argue that consideration of the ‘pricequality’ dilemma and the ‘communication’ dilemma is useful to explain and improve the handling of uncertainty in CBA. The ‘price-quality’ dilemma refers to the trade-off between the quality of welfare effect estimations and the costs of providing these estimations. Instruments to produce good quality effect estimates (including uncertainties) can be expensive both in monetary terms and time. We discuss the application of probabilistic traffic models as a promising example of how the ‘price-quality’ dilemma can be solved. The ‘communication’ dilemma refers to the observation that both a poor communication and a too prominent communication of uncertainties can cause problems for decision-makers. We argue that cognitive psychological theory provides useful perspectives to solve this dilemma, by providing a psychological framework which might help to explain why different types of people process CBA information differently. The results of this research may enhance first insights into the questions how the two dilemmas can be solved

A Single-Trim frequency reference system with 0.7 ppm/°C from −63 °C to 165 °C Consuming 210 μW at 70 MHz

This article presents a frequency reference system that combines high frequency accuracy and low power consumption using a single-point temperature trim and batch calibration. The system is intended as a low-cost fully integrated crystal oscillator replacement. In this system, the oscillation frequency of a power-efficient, but process, voltage, temperature (PVT) and lifetime (L)-sensitive current-controlled ring oscillator (CCO) is periodically (re)calibrated by the well-behaved frequency stability of an untuned LC -based Colpitts oscillator (LCO), which is optimized for stability over PVT variations and lifetime (PVTL). During the single-point room temperature factory trim, the frequency of the LCO is determined and the result is digitally stored. An on-chip calibration engine tunes the CCO to the target frequency based on the LCO frequency, temperature sensor information, and digitally stored trimming information, thus effectively improving the frequency stability of the ring oscillator. The relatively high-power LCO is heavily duty-cycled to minimize the overall power consumption. A prototype fabricated in a 0.13- μ m high-voltage (HV) CMOS SOI process and assembled in a plastic package demonstrates an inaccuracy lower than ±93 ppm over a temperature range from -63 °C to 165 °C across 18 samples. The presented frequency reference system, including on-chip voltage regulators and a temperature sensor, occupies a chip area of 0.69 mm2 and consumes about 64 μA from a single 3.3-V supply. The frequency error due to supply variation is roughly 92 ppm/V. The mean frequency shift due to aging, measured before and after a six-day storage bake at 175 °C, is only 52 ppm.</p

Endosonography With or Without Confirmatory Mediastinoscopy for Resectable Lung Cancer:A Randomized Clinical Trial

PURPOSE:Resectable non-small-cell lung cancer (NSCLC) with a high probability of mediastinal nodal involvement requires mediastinal staging by endosonography and, in the absence of nodal metastases, confirmatory mediastinoscopy according to current guidelines. However, randomized data regarding immediate lung tumor resection after systematic endosonography versus additional confirmatory mediastinoscopy before resection are lacking.METHODS:Patients with (suspected) resectable NSCLC and an indication for mediastinal staging after negative systematic endosonography were randomly assigned to immediate lung tumor resection or confirmatory mediastinoscopy followed by tumor resection. The primary outcome in this noninferiority trial (noninferiority margin of 8% that previously showed to not compromise survival, Pnoninferior &lt;.0250) was the presence of unforeseen N2 disease after tumor resection with lymph node dissection. Secondary outcomes were 30-day major morbidity and mortality.RESULTS:Between July 17, 2017, and October 5, 2020, 360 patients were randomly assigned, 178 to immediate lung tumor resection (seven dropouts) and 182 to confirmatory mediastinoscopy first (seven dropouts before and six after mediastinoscopy). Mediastinoscopy detected metastases in 8.0% (14/175; 95% CI, 4.8 to 13.0) of patients. Unforeseen N2 rate after immediate resection (8.8%) was noninferior compared with mediastinoscopy first (7.7%) in both intention-to-treat (Δ, 1.03%; UL 95% CIΔ, 7.2%; Pnoninferior =.0144) and per-protocol analyses (Δ, 0.83%; UL 95% CIΔ, 7.3%; Pnoninferior =.0157). Major morbidity and 30-day mortality was 12.9% after immediate resection versus 15.4% after mediastinoscopy first (P =.4940).CONCLUSION:On the basis of our chosen noninferiority margin in the rate of unforeseen N2, confirmatory mediastinoscopy after negative systematic endosonography can be omitted in patients with resectable NSCLC and an indication for mediastinal staging.</p

Tapered Multipath Inductors

In an embodiment, an integrated circuit die includes a semiconductor substrate, patterned metal layers compiled over the semiconductor substrate, and a tapered multipath inductor formed in the patterned metal layers. The tapered multipath inductor includes, in turn, an inductor input ter­minal, an inductor output terminal, and N number of parallel inductor tracks electrically coupled between the inductor input terminal and the inductor output terminal. The parallel inductor tracks wind or wrap around an inductor centerline to define a plurality of multipath inductor windings includ­ing an innermost winding and an outermost winding. The parallel inductor tracks further vary in track width when progressing from the outermost winding to the innermost winding of the plurality of multipath inductor windings

Transport policy in Dutch election manifestos: Estimating the environmental impact

It has become a tradition in the Netherlands to assess the environmental impact of election manifestos produced by Dutch political parties. This paper shows that the assessment methodology chosen for transport policy proposals can lead to uncertain estimates. However, election manifesto transport analysis can meritably establish which election manifesto offers the most—and which the least—environmental impact, a robust result that does not mislead the public. The pros and cons of assessing election manifestos have been fiercely debated in the Netherlands. Following this debate and our own observations we conclude that another important merit of assessment is that it can assist political parties in making their election promises realistic and consistent

A digital to analog converter

A digital to analog converter for a multibit digital input signal has a set of conversion elements for the positive signal excursions and a set of conversion elements for the negative signal excursions. In each set the conversion elements are selected according to a dynamic element matching algorithm. To improve the mismatch-noise shaping of these algorithms, excess conversion elements may be additionally selected