Incorporating equity into transport planning: utility, priority and sufficiency approaches

The analysis addresses the issue of transport equity and explores three different approaches to equity in transport: utilitarianism, sufficientarianism and prioritarianism. Each approach calls for a different treatment of the benefits reaped by different population groups in the assessment of transport investments or policies. In utilitarianism, which underlies much of the current practice of transport project appraisal, all benefits receive the same weight, irrespective of the recipient of the benefits. In both sufficientarianism and prioritarianism, benefits are weighed in distinct ways, depending on the characteristics of the recipients. The three approaches are illustrated using a fictive case study, in which three different transport investment are assessed and compared to each other. Finally, the assessment of transport investments will be explored using the cost-effectiveness analysis (CEA). The CEA assesses the distributional effects of transport investments for utilitarism, sufficientarism and prioritarism approaches and addresses distinct needs associated with different population groups in respect to their transport

Transit Use by Young People in Times of Financial Austerity: A Cause of Equity Concern?

This study investigates the effect of price and travel time fairness and spatial equity in transit provision on the perceived transit service quality, willingness to pay, and habitual frequency of use. Based on the theory of planned behavior, we developed a web-based questionnaire for revealed preferences data collection. The survey was administered among young people in Copenhagen and Lisbon to explore the transit perceptions and use under different economic and transit provision conditions. The survey yielded 499 questionnaires, analyzed by means of structural equation models. Results show that higher perceived fairness relates positively to higher perceived quality of transit service and higher perceived ease of paying for transit use. Higher perceived spatial equity in service provision is associated with higher perceived service quality. Higher perceived service quality relates to higher perceived ease of payment, which links to higher frequency of transit use.

Contribution to Load-Frequency Regulation of a Hydropower Plant with Long Tail-Race Tunnel

In this paper, a hydroelectric power plant with long tail-race tunnel has been modelled for assessing its contribution to secondary regulation reserve. Cavitation problems, caused by the discharge conduit length, are expected downstream the turbine where low pressure appears during regulation manoeuvres. Therefore, governor's gains should be selected taking into account these phenomena. On the other hand, regulation services bidden by the plant operator should fulfil TSO (Transmission System Operator) quality requirements. A methodology for tuning governor PI gains is proposed and applied to a Hydro power plant in pre-design phase in northwest area of Spain. The PI gains adjustment proposed provides a proper plant response, according to some established indexes, while avoiding cavitation phenomena.

Frequency control support of a wind-solar isolated system by a hydropower plant with long tail-race tunnel

Pumped storage hydro plants (PSHP) can provide adequate energy storage and frequency regulation capacities in isolated power systems having significant renewable energy resources. Due to its high wind and solar potential, several plans have been developed for La Palma Island in the Canary archipelago, aimed at increasing the penetration of these energy sources. In this paper, the performance of the frequency control of La Palma power system is assessed, when the demand is supplied by the available wind and solar generation with the support of a PSHP which has been predesigned for this purpose. The frequency regulation is provided exclusively by the PSHP. Due to topographic and environmental constraints, this plant has a long tail-race tunnel without a surge tank. In this configuration, the effects of pressure waves cannot be neglected and, therefore, usual recommendations for PID governor tuning provide poor performance. A PI governor tuning criterion is proposed for the hydro plant and compared with other criteria according to several performance indices. Several scenarios considering solar and wind energy penetration have been simulated to check the plant response using the proposed criterion. This tuning of the PI governor maintains La Palma system frequency within grid code requirements.

A Thing Called Race

Keynote Speaker

The Thought Leaders Roundtable Discussion about Race Relations in Missouri

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The incompatible interaction between Phytophthora parasitica var. nicotianae race 0 and tobacco is suppressed in transgenic plants expressing antisense lipoxygenase sequences

Nicotiana tabacum 46-8 cultivar displays an incompatible interaction with race 0 of Phytophthora parasitica var. nicotianae (Ppn), a fungal pathogen of most tobacco cultivars. At the plant level, incompatibility is characterized by the induction of lipoxygenase (LOX, EC = 1.13.11.12) activity and localized hypersensitive cell death before defense gene activation. To evaluate the involvement of LOX in the onset of plant defense, tobacco 46-8 plants were genetically engineered using full-length or partial-length antisense (AS) tobacco LOX cDNA constructs. AS expression strongly reduced elicitor- and pathogen-induced LOX activity. Eight independent AS-LOX lines were selected and assayed for their response to Ppn. After root or stem inoculation with race 0, all AS-LOX lines but one displayed a compatible phenotype whereas control transformed plants, not containing the AS-LOX cassette, showed the typical incompatible reaction. The presence of the fungus in transgenic lines was demonstrated by PCR amplification of a Ppn-specific genomic sequence. A linear relationship was found between the extent of LOX suppression and the size of the lesion caused by the fungus. The AS-LOX plants also showed enhanced susceptibility toward the compatible fungus Rhizoctonia solani. The results demonstrate the strong involvement of LOX in the establishment of incompatibility in plant–microorganism interactions, consistent with its role in the defense of host plants.

Competência do CADE na disciplina antitruste das operações envolvendo fundos de private equity

Este trabalho tem por objeto a análise dos critérios de submissão de atos de concentração envolvendo fundos de investimento para apreciação pelo Conselho Administrativo de Defesa Econômica (CADE), com enfoque nos fundos de private equity. Nos últimos anos os fundos de investimento têm adquirido crescente importância na economia brasileira em setores estratégicos. No entanto, o tratamento pela autoridade antitruste brasileira das operações destes veículos se revela instável resultando em certa insegurança sobre quais devem ser submetidas ao controle de concentrações. Assim, este trabalho propõe uma forma de se acessarem essas operações que ao mesmo tempo atenda aos objetivos visados com o controle das estruturas no Direito Concorrencial brasileiro e não crie obstáculos à atuação destes importantes veículos para a economia moderna. Para tanto, buscou-se respaldo na experiência de países onde a tradição antitruste e o fenômeno analisado são muito mais antigos do que no Brasil. No entanto, uma vez que nem mesmo nestes países a questão está livre de revisões periódicas e alguma controvérsia, este trabalho não tem como pretensão apresentar uma solução definitva para o problema. O primeiro capítulo expõe o objeto de estudo, seu funcionamento e sua importância para a economia. No segundo capítulo são abordados os objetivos do controle de estruturas no Brasil, os critérios de conhecimento de operações pela autoridade concorrencial brasileira e a sua interpretação pelo CADE, notadamente no que toca aos fundos de investimento. No terceiro capítulo são abordadas as ligações estruturais entre concorrentes mais relevantes do ponto de vista concorrencial quando se trata de aquisições perpetradas por fundos de investimento: participações minoritárias e interlocking directorates.

Acting White Among Black College Students: A Phenomenological Study of Social Constructions of Race

This study was a qualitative examination of Black college students' experiences with the Acting White label. In conducting this study, two gaps in literature were addressed: (1) the lack of literature on Black college students and the acting white label, and (2) lack of attention to a US racial history and current structures which allow a label such as "acting white" to exist. Thus, the purpose of this study was to call attention to the experiences of Black college students as it relates to the acting white label. Additionally, the study calls attention to social constructions that allow the acting white label to exist and to be sustained. Data was collected from 14 Black college students at a predominantly white, private, liberal arts university in the west. Based on responses from students in the study, Black college students do hear that they are acting white. Yet, their reaction to hearing the label does not cause them to underachieve academically, but does have an impact on their social actions. The ways in which Black college students in the study were labeled as acting white was based on academic pursuits, speech patterns, dress, and hobbies. Student reactions to the label ranged from ignoring the label to challenging the accuser. In regards to how the acting white label is sustained, students in the study expressed that they learned what it meant to act white or black from family interactions, social interactions and observations from family and friends, and from media sources. It was concluded that Black college students, despite reactions, do hear the label and that the label seems to be used as a means to attack Black students and their identity.