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In Situ Assessment of Uplink Duty Cycles for 4G and 5G Wireless Communications

In this presented study, we measured in situ the uplink duty cycles of a smartphone for 5G NR and 4G LTE for a total of six use cases covering voice, video, and data applications. The duty cycles were assessed at ten positions near a 4G and 5G base-station site in Belgium. For Twitch, VoLTE, and WhatsApp, the duty cycles ranged between 4% and 22% in time, both for 4G and 5G. For 5G NR, these duty cycles resulted in a higher UL-allotted time due to time division duplexing at the 3.7 GHz frequency band. Ping showed median duty cycles of 2% for 5G NR and 50% for 4G LTE. FTP upload and iPerf resulted in duty cycles close to 100%.

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Smart and Age-Friendly Cities in Romania

The role of smart cities in order to improve older people’s quality of life, sustainability and opportunities, accessibility, mobility, and connectivity is increasing and acknowledged in public policy and private sector strategies in countries all over the world. Smart cities are one of the technological-driven initiatives that may help create an age-friendly city. Few research studies have analysed emerging countries in terms of their national strategies on smart or age-friendly cities. In this study, Romania which is predicted to become one of the most ageing countries in the European Union is used as a case study. Through document analysis, current initiatives at the local, regional, and national level addressing the issue of smart and age-friendly cities in Romania are investigated. In addition, a case study is presented to indicate possible ways of the smart cities initiatives to target and involve older adults. The role of different stakeholders is analysed in terms of whether initiatives are fragmentary or sustainable over time, and the importance of some key factors, such as private–public partnerships and transnational bodies. The results are discussed revealing the particularities of the smart cities initiatives in Romania in the time frame 2012–2020, which to date, have limited connection to the age-friendly cities agenda. Based on the findings, a set of recommendations are formulated to move the agenda forward. CC-BY Original article: https://doi.org/10.3390/ijerph17145202 (This article belongs to the Special Issue Feature Papers "Age-Friendly Cities & Communities: State of the Art and Future Perspectives") https://www.dehaagsehogeschool.nl/onderzoek/lectoraten/details/urban-ageing#over-het-lectoraat

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Smart and Age-Friendly Cities in Romania

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Investigations on the restoration and seismic enhancement options for the jaisedewal temple after the Gorkha eartquake in Nepal

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Built Environment Influences on Emotional State Loneliness among Young Adults during Daily Activities: An Experience Sampling Approach

Loneliness among young adults is a growing concern worldwide, posing serious health risks. While the human ecological framework explains how various factors such as socio-demographic, social, and built environment characteristics can affect this feeling, still, relatively little is known about the effect of built environment characteristics on the feelings of loneliness that young people experience in their daily life activities. This research investigates the relationship between built environment characteristics and emotional state loneliness in young adults (aged 18–25) during their daily activities. Leveraging the Experience Sampling Method, we collected data from 43 participants for 393 personal experiences during daily activities across different environmental settings. The findings of a mixed-effects regression model reveal that built environment features significantly impact emotional state loneliness. Notably, activity location accessibility, social company during activities, and walking activities all contribute to reducing loneliness. These findings can inform urban planners and municipalities to implement interventions that support youngsters’ activities and positive experiences to enhance well-being and alleviate feelings of loneliness in young adults. Specific recommendations regarding the built environment are (1) to create spaces that are accessible, (2) create spaces that are especially accessible by foot, and (3) provide housing with shared facilities for young adults rather than apartments/studios.

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Combining ecosystem modeling with serious gaming in support of transboundary maritime spatial planning

The Maritime Spatial Planning (MSP) Challenge simulation platform helps planners and stakeholders understand and manage the complexity of MSP. In the interactive simulation, different data layers covering an entire sea region can be viewed to make an assessment of the current status. Users can create scenarios for future uses of the marine space over a period of several decades. Changes in energy infrastructure, shipping, and the marine environment are then simulated, and the effects are visualized using indicators and heat maps. The platform is built with advanced game technology and uses aspects of role-play to create interactive sessions; it can thus be referred to as serious gaming. To calculate and visualize the effects of planning decisions on the marine ecology, we integrated the Ecopath with Ecosim (EwE) food web modeling approach into the platform. We demonstrate how EwE was connected to MSP, considering the range of constraints imposed by running scientific software in interactive serious gaming sessions while still providing cascading ecological feedback in response to planning actions. We explored the connection by adapting two published ecological models for use in MSP sessions. We conclude with lessons learned and identify future developments of the simulation platform.

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Conceptual structural design

The subject of this textbook is a methodical approach on the complex problem-solving process of conceptual structural design, leading to a controlled build-up of insight into the behaviour of the structure and supporting the actual successive design decisions during the conceptual design phase on the basis of a coherent set of solution components.

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If a Tree Falls

This article presents and discusses student assignments reflecting on the documentary film If a Tree Falls, written as part of the Business Ethics and Sustainability course at The Hague University of Applied Sciences. This article follows two lines of inquiry. First, it challenges mainstream environmental education, supporting critical pedagogy and ecopedagogy. These pedagogies, which advocate pedagogy for radical change, offer a distinct and valuable contribution to sustainability education, enabling students to critically examine normative assumptions, and learn about ethical relativity, and citizenship engagement from environmentalists. The discussion of “lessons of radical environmentalism” is pertinent to the question of what types of actions are likely to achieve the widely acceptable long-term societal change. While this article focuses on student reflection on a film about radical environmentalism, this article also discusses many forms of activism and raises the question of what can be considered effective activism and active citizenship in the context of the philosophy of (environmental or sustainability) education in connection didactics and curriculum studies. Second, this article argues for the need for reformed democracy and inclusive pluralism that recognizes the needs of nonhuman species, ecocentrism, and deep ecology. The connection between these two purposes is expressed in the design of the student assignment: It is described as a case study, which employs critical pedagogy and ecopedagogy. https://doi.org/10.3390/educsci9040284 LinkedIn: https://www.linkedin.com/in/helenkopnina/

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Numerical modelling of cavity wall metal ties

The assessment of the out-of-plane response of unreinforced masonry (URM) buildings with cavity walls has been a popular topic in regions such as Central and Northern Europe, Australia, New Zealand, China and several other countries.Cavity walls are particularly vulnerable as the out-of-plane capacity of each individual leaf is significantly smaller than the one of a solid wall. In the Netherlands, cavity walls are characterized by an inner load-bearing leaf of calcium silicate bricks, and by an outer veneer of clay bricks that has only aesthetic and insulation functions. The two leaves are typically connected by means of metallic ties. This paper utilizes the results of an experimental campaign conducted by the authors to calibrate a hysteretic model that represents the axial cyclic response of cavity wall tie connections. The proposednumerical model uses zero-length elements implemented in OpenSees with the Pinching4 constitutive model to account for the compression-tension cyclic behaviour of the ties. The numerical model is able to capture important aspects of the tie response such as the strength degradation, the unloading stiffness degradation and the pinching behaviour. The numerical modelling approach in this paper can be easily adopted by practitioner engineers who aim to model the wall ties more accurately when assessing the structures against earthquakes.

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Numerical modelling of cavity wall metal ties

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Seismic behavior of two exterior beam-column connections made of normal-strength concrete developed for precast construction

The lack of in-depth understanding of the seismic behavior and ductility of precast concrete structures makes it difficult to reach to ductility demand which could be exhibited during an earthquake. The limitations are mainly related to the beam-to-column connections as the main load transfer paths. Two distinct exterior beam-column connections made of normal-strength concrete are investigated experimentally. Both dry and wet type installment techniques are used in the industrial type joints while the residential type joints are wet connections. The specimens are subjected cyclic displacement reversals in order to obtain information on strength, stiffness and ductility characteristics of the connection details. The preliminary design of the joints has been updated during the tests based on the damages observed, thus a set of improved specimens have also been built and tested, and a relatively better performance is obtained expectedly. The industrial and residential types of connections showed stable load-displacement cycles with high energy dissipation up to structural drift of 2%, though a significant level of pinching and deterioration of the critical section have occurred at around 3% drift level. The tested specimens have been numerically modeled to calibrate the analytical tools, and a satisfactory approximation has been obtained between experimental and numerical results.

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Products 88

In Situ Assessment of Uplink Duty Cycles for 4G and 5G Wireless Communications

Smart and Age-Friendly Cities in Romania

Investigations on the restoration and seismic enhancement options for the jaisedewal temple after the Gorkha eartquake in Nepal

Built Environment Influences on Emotional State Loneliness among Young Adults during Daily Activities: An Experience Sampling Approach

Combining ecosystem modeling with serious gaming in support of transboundary maritime spatial planning

Conceptual structural design

If a Tree Falls

Numerical modelling of cavity wall metal ties

Seismic behavior of two exterior beam-column connections made of normal-strength concrete developed for precast construction

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Products 88

In Situ Assessment of Uplink Duty Cycles for 4G and 5G Wireless Communications

Smart and Age-Friendly Cities in Romania

Investigations on the restoration and seismic enhancement options for the jaisedewal temple after the Gorkha eartquake in Nepal

Built Environment Influences on Emotional State Loneliness among Young Adults during Daily Activities: An Experience Sampling Approach

Combining ecosystem modeling with serious gaming in support of transboundary maritime spatial planning

Conceptual structural design

If a Tree Falls

Numerical modelling of cavity wall metal ties

Seismic behavior of two exterior beam-column connections made of normal-strength concrete developed for precast construction