This paper assesses wind resource characteristics and energy yield for micro wind turbines integrated on noise barriers. An experimental set-up with sonic anemometers placed on top of the barrier in reference positions is realized. The effect on wind speed magnitude, inflow angle and turbulence intensity is analysed. The annual energy yield of a micro wind turbine is estimated and compared using data from a micro-wind turbine wind tunnel experiment and field data. Electrical energy costs are discussed as well as structural integration cost reduction and the potential energy yield could decrease costs. It was found that instantaneous wind direction towards the barrier and the height of observation play an influential role for the results. Wind speed increases in perpendicular flows while decreases in parallel flow, by +35% down to −20% from the reference. The azimuth of the noise barrier expressed in wind field rotation angles was found to be influential resulted in 50%–130% changes with respect to annual energy yield. A micro wind turbine (0.375 kW) would produce between 100 and 600 kWh annually. Finally, cost analysis with cost reductions due to integration and the energy yield changes due to the barrier, show a LCOE reduction at 60%–90% of the reference value. https://doi.org/10.1016/j.jweia.2020.104206
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The environment of the(Dutch) building industry is increasingly turbulent. There are many cges for the building industry. Innovative tendering, better marketing, openness and transparency are examples of this. A strong reduction in failure costs (estimated at between 10 and 25% of the total costs) and an increase in quality are also necessary. Lastly, the declining inflow of young people has to be mentioned. The image of the building industry is not particularly good and students prefer to choose other industries. The building industry therefore has to change and, so far, everyone agrees. Evidently both the building industry and its environment are very keen to change; the sincere will is there, and money and energy are available, but it seems that efforts are not proceeding in a very planned or coordinated manner at present. And this is causing fragmentation and, therefore, sub optimisation. How does sectoral change proceed and how is this process to be managed? That is the central question in this paper.
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By use of a literature review and an environmental scan four plausible future scenarios will be created, based on the research question: How could the future of backpack tourism look like in 2030, and how could tourism businesses anticipate on the changing demand. The scenarios, which allow one to ‘think out of the box’, will eventually be translated into recommendations towards the tourism sector and therefore can create a future proof company strategy.
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OBJECTIVE: Optimal timing of palatal repair is still subject of discussion. Although literature provides some evidence that palatal closure prior to 6 months positively influence speech outcome in children with clefts, only few studies verified this hypothesis. The purpose of this study was to describe and compare articulation and resonance characteristics following early (≤6 months) and later (>6 months) palatal repair, performed using the Sommerlad technique. METHODS: Comparison was made between 12 Ugandan children with isolated cleft (lip and) palate following early palatal repair (mean age: 3.3 m) and 12 Belgian patients with later palatal repair (mean age: 11.1 m), matched for cleft type, age and gender. A Ugandan and Belgian age- and gender-matched control group without clefts was included to control for language, culture and other environmental factors. Articulation assessments consisted of consonant inventories and phonetic and phonological analyses that were based on consensus transcriptions. In addition, resonance was evaluated by perceptual consensus ratings and objective mean nasalance values. RESULTS: The Belgian and Ugandan control groups were comparable for the majority of the variables. Comparison of cleft palate groups revealed no clinically relevant significant group differences for consonant inventory or phonological processes. Phonetic analysis showed significantly more distortions in the Belgian cleft palate group due to higher occurrence frequencies for (inter)dental productions of apico-alveolar consonants. Neither perceptual consensus ratings of hypernasality, hyponasality, cul-de-sac resonance and nasal emission/turbulence, nor objective mean nasalance values for oral speech samples revealed significant group differences (p>0.05). CONCLUSION: Articulation and resonance characteristics of young children following palatal repair before and after 6 months of age seem to be at least comparable.
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This study explores how non-executive directors are challenged by management while they seek to improve the effectiveness of supervisory boards in the Netherlands. A combination of semi-structured interviews and a questionnaire among non-executive directors indicates that supervisory board members mainly experience boardroom challenges in three core areas: the ability of non-executive directors to ask management critical questions, information asymmetries between the management and supervisory boards and the management of the relationship between individual executive and non-executive directors. The qualitative in-depth analysis reveals the complexity of the main contributing factors to problems in the boardroom as well as the range of process and social interventions non-executive directors use to address boardroom issues. The findings highlight the need to better understand boardroom processes and the need of non-executive directors to carefully manage relationships in and around the boardroom.
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Competitive advantage is probably the most popular business concept today (Mooney, 2007). This article aims to investigate critically the discourse on competitive advantage, as expressed by business literature, by locating its meanings in the public higher education sector. This research reveals that people working within the HEIs have given broader and more diversified meanings to this concept, which are partly due to the message received from external environment, and partly because of the influence of professional settings in which they function. By studying these diversified meanings, 13 elements are identified in constructing the competitive advantages of higher education institutions. Furthermore, the importance of each element is rated and ranked which enables us to assess the quantitative significance. The clarification of this container concept “competitive advantage” leads to the conclusion that the business way of defining of competitive advantage should be critically reviewed and verified in the context of public higher education sector, because the competition in the public education market is different from the normal market competition defined by the business literature.
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The ‘Grand Challenges’ of our times, like climate change, resource depletion, global inequity, and the destruction of wildlife and biodiversity can only be addressed by innovating cities. Despite the options of tele-working, tele-trading and tele-amusing, that allow people to participate in ever more activities, wherever they are, people are resettling in cities at an unprecedented speed. The forecasted ‘rurification’ of society did not occur. Technological development has drained rural society from its main source of income, agriculture, as only a marginal fraction of the labour force is employed in agriculture in the rich parts of the world. Moreover, technological innovation created new jobs in the IT and service sectors in cities. Cities are potentially far more resource efficient than rural areas. In a city transport distances are shorter, infrastructures can be applied to provide for essential services in a more efficient way and symbiosis might be developed between various infrastructures. However, in practice, urban infrastructures are not more efficient than rural infrastructures. This paper explores the reasons why. It digs into the reasons why the symbiotic options that are available in cities are not (sufficiently) utilised. The main reason for this is not of an economic nature: Infrastructure organisations are run by experts who are part of a strong paradigmatic community. Dependence on other organisations is regarded as limiting the infrastructure organisation’s freedom of action to achieve its own goals. Expert cultures are transferred in education, professional associations, and institutional arrangements. By 3 concrete examples of urban systems, the paper will analyse how various paradigms of experts co-evolved with evolving systems. The paper reflects on recent studies that identified professional education as the initiation into such expert paradigms. It will thereby relate lack of urban innovation to the monodisciplinary education of experts and the strong institutionalised character of expertise. https://doi.org/10.1007/978-3-319-63007-6_43 LinkedIn: https://www.linkedin.com/in/karelmulder/
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In January 2017, relations between Greece and Turkey were under severe strain when warships from both sides engaged in a brief standoff near a pair of uninhabited Greek ‘islets’ in the Aegean, whose sovereignty is disputed by Turkey. Theoretically informed by the literature of foreign policy analysis, we examine how the Greek diplomats, military officers and political analysts interpreted Turkey’s behaviour at that particular time. The article considers the following research question: which factors, from a Greek point of view, explain Turkey’s foreign policy in the Aegean in January 2017? Our theoretical expectation is that, in the aftermath of the coup attempt in Turkey, Greek diplomats, military officers and political analysts would ascribe domestic calculations into Turkey’s activities. We employed Q- methodology to uncover socially shared perspectives on this topic. Based on our findings, we uncovered two viewpoints: (1) Turkey’s diachronic strategy in the Aegean and (2) the strongman style. According to the former and most widely shared viewpoint, a consistent ‘rationalist’ strategy to change the status quo in the Aegean explains Turkey’s behaviour. According to the second one, the belief system of Turkey’s leadership legitimises the use of force in the conduct of foreign policy.
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Cleft lip and/or palate (CL/P) is a congenital craniofacial defect that arises on average in 1.7 per 1000 live births. This anomaly causes atypical facial appearance, hearing problems, malocclusions and speech disorders. Outcomes in terms of speech are influenced by timing of surgical cleft closure. In the Comprehensive Rehabilitation Services in Uganda (CoRSU) hospital, closure of the entire cleft during a single surgery prior to the age of 6 months is preferred in view of reducing default rates for second surgery and decreasing risks for malnutrition and death. However, some patients arrive the first time at the hospital in later childhood, youth or adulthood. No information about satisfaction and speech outcome was yet available for these Ugandan patients. Moreover, only few, if any studies systematically assessed satisfaction and speech following similar surgical timing protocols. Therefore, in view of searching for the optimal surgical treatment for patients with CL/P, the general aim of the current doctoral thesis was to verify satisfaction and speech in Ugandan patients with CL/P repaired in CoRSU by one experienced surgeon using the Sommerlad technique for palatal closure. In view of clinics and further research, normative nasalance values were first obtained in Ugandan English-speaking males and females (age: 2;7 to 13;5 years) without craniofacial anomalies. No significant age and gender differences were observed. Second, parental satisfaction was studied in Ugandan children with unilateral or bilateral cleft lip and palate (CLP) following synchronous lip and palatal closure. Overall high levels of satisfaction were noted for appearance of lip, nose and face, despite lower satisfaction levels for teeth appearance and speech. Comparison with an age- and gender-matched non-cleft control group revealed significant higher parental dissatisfaction for speech and appearance of teeth and nose in Ugandan patients with CLP. Third, articulation and resonance characteristics of Ugandan patients with early synchronous closure of C(L)P (≤ 6 months) were assessed. Comparison with an age- and gender-matched non-cleft control group revealed various deviations from normal speech development. The Ugandan CP group showed significantly smaller consonant inventories as well as significantly more phonetic disorders, phonological processes and nasal emission/turbulence compared to the control group. In addition, Ugandan patients with C(L)P were compared to a Belgian CP group (matched for cleft type, age and gender) who underwent palatal repair after the age of 6 months. A Ugandan and Belgian age- and gender-matched non-cleft control group was included to control for language, culture and other environmental factors. Comparison of the Ugandan and Belgian CP group revealed at least similar articulation and resonance characteristics. No significant group differences were obtained for perceptual evaluation of resonance, mean nasalance values of oral speech samples, consonant inventories and most phonetic errors and phonological processes. However, the Belgian CP group showed significantly more distortions due to higher occurrence frequencies for (inter)dental articulation of apico-alveolar consonants. Finally, articulation and resonance characteristics as well as patients’ satisfaction with speech were verified in Ugandan patients following delayed one-stage soft and hard palatal closure (≥ 8 years). Comparison with an age- and gender-matched non-cleft control group revealed overall low satisfaction with speech and severely disordered articulation and resonance. The patient group showed significantly smaller consonant inventories, more phonetic and phonological disorders, more hypernasality and nasal emission/turbulence as well as higher mean nasalance values for oral and oronasal speech samples compared to the control group. When findings of the current doctoral thesis are placed within a broader framework, early closure of the entire cleft during a single surgery seems to be an appropriate surgical timing protocol for resource-poor countries. However, prior to application in northern countries, more information on maxillofacial growth disturbances is required. Furthermore, when youngsters and adults present with untreated clefts, delayed cleft repair might be of value, although speech outcomes are poor.
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