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

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Prolonged electrical stimulation-induced gluteal and hamstring muscle activation and sitting pressure in spinal cord injury: Effect of duty cycle

Abstract—Pressure ulcers (PUs) are highly prevalent in people with spinal cord injury (SCI). Electrical stimulation (ES) activates muscles and might reduce risk factors. Our objectives were to study and compare the effects of two duty cycles during 3 h of ES-induced gluteal and hamstring activation on interface pressure distribution in sitting individuals with SCI and study the usability of a newly developed electrode garment (ES shorts). Ten individuals with SCI participated in this study, in which two ES protocols with different duty cycles (1:1 s vs 1:4 s on-off) were applied in counterbalanced order using a custom-made garment with built-in electrodes. Outcome variables included interface pressure of the ischial tuberosities (ITs) and pressure gradient. A questionnaire was used to determine usability of the ES shorts. In both protocols, ES caused a significant decrease in average IT pressure compared with rest (no ES); on average, 35% for protocol 1:4 and 13% for protocol 1:1. The ES on-off duty cycle of protocol 1:4 showed less muscle fatigue. In general, participants scored the usability of the ES shorts as satisfactory. In this study, the application of ES resulted in a significant decrease in IT pressure. The ES on-off duty cycle of 1:4 s is recommended because of the less fatiguing effect. ES of the hamstrings and gluteal muscles might be a promising method in preventing PUs, but further study is needed.

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(re)CYCLE Limburg

This booklet holds a collection of drawings, maps, schemes, collages, artistic impressions etc. which were made by students during an intense design moment in the project (re)CYCLE Limburg, which took place in December 2016. Students of Built Environment, Facility Management, Social Work and Health & Care cooperated in making designs and developing strategies for urban renewal in Kerkrade West (Province of Limburg, the Netherlands). The study focused on the importance of qualitative and shared public spaces. The local community (inhabitants, shopkeepers, entrepreneurs, municipality, housing corporation) was actively engaged by sharing knowledge and information, ideas and opinions. These reflections are part of the Limburg Action Lab (part of the Smart Urban Redesign Research Centre). It engages in research by design on innovative and tactical interventions in public space, that might enhance the identity, sustainability and socio-spatial structure of neighbourhoods.

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Resource-Efficient Image Buffer Architecture for Neighborhood Processors

Neighborhood image processing operations on Field Programmable Gate Array (FPGA) are considered as memory intensive operations. A large memory bandwidth is required to transfer the required pixel data from external memory to the processing unit. On-chip image buffers are employed to reduce this data transfer rate. Conventional image buffers, implemented either by using FPGA logic resources or embedded memories are resource inefficient. They exhaust the limited FPGA resources quickly. Consequently, hardware implementation of neighborhood operations becomes expensive, and integrating them in resource constrained devices becomes unfeasible. This paper presents a resource efficient FPGA based on-chip buffer architecture. The proposed architecture utilizes full capacity of a single Xilinx BlockRAM (BRAM36 primitive) for storing multiple rows of input image. To get multiple pixels/clock in a user defined scan order, an efficient duty-cycle based memory accessing technique is coupled with a customized addressing circuitry. This accessing technique exploits switching capabilities of BRAM to read 4 pixels in a single clock cycle without degrading system frequency. The addressing circuitry provides multiple pixels/clock in any user defined scan order to implement a wide range of neighborhood operations. With the saving of 83% BRAM resources, the buffer architecture operates at 278 MHz on Xilinx Artix-7 FPGA with an efficiency of 1.3 clock/pixel. It is thus capable to fulfill real time image processing requirements for HD image resolution (1080 × 1920) @103 fcps.

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Resource-Efficient Image Buffer Architecture for Neighborhood Processors

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Optimization of protocols using neuromuscular electrical stimulation for paralyzed lower-limb muscles to increase energy expenditure in people with spinal cord injury

OBJECTIVE: To evaluate if using surface neuromuscular electrical stimulation (NMES) for paralyzed lower-limb muscles results in an increase in energy expenditure and if the number of activated muscles and duty cycle affect the potential increase.DESIGN: Cross-sectional study.RESULTS: Energy expenditure during all NMES protocols was significantly higher than the condition without NMES (1.2 ± 0.2 kcal/min), with the highest increase (+ 51%; +0.7 kcal/min, 95% CI: 0.3 - 1.2) for the protocol with more muscles activated and the duty cycle with a shorter rest period. A significant decrease in muscle contraction size during NMES was found with a longer stimulation time, more muscles activated or the duty cycle with a shorter rest period.CONCLUSION: Using NMES for paralyzed lower-limb muscles can significantly increase the energy expenditure compared to sitting without NMES with the highest increase for the protocol with more muscles activated and the duty cycle with a shorter rest period. Muscle fatigue occurred significantly with the more intense NMES protocols which might cause a lower energy expenditure in a longer protocol. Future studies should further optimize the NMES parameters and investigate the long-term effects of NMES on weight management in people with SCI.

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Optimization of protocols using neuromuscular electrical stimulation for paralyzed lower-limb muscles to increase energy expenditure in people with spinal cord injury

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The intervention in Libya: "The responsibility to Protect" as a new norm?

In maart 2011 dreigde Muammer Gaddafi van Libya duizenden onschuldige burgers van de stad Benghazi uit hun huizen te halen om hen te vermoorden. De Veiligheidsraad van de Verenigde Naties verwees de situatie door naar het Internationaal Strafhof in Den Haag, dwong een no-flyzone af en gaf de NAVO een mandaat om burgers te beschermen with all necessary means, met de uitzondering van grondtroepen. Deze operatie was snel, robuust en effectief. Het principe van The Responsibility to Protect (R2P) -de verantwoordelijkheid van de internationale gemeenschap om genocide, misdaden tegen de menselijkheid, etnische zuivering en oorlogsmisdaden te voorkomen en te stoppen- werd voor het eerst volledig toegepast. Is R2P daarmee een norm geworden? Dit onderzoek plaatst de casus Libië in het model van de "Norm Life Cycle" (de levenscyclus van een norm) van de Constructivistische theoretici Finnemore en Sikkink (1998). Libië toont aan dat R2P nu een tipping point (omslagpunt) heeft bereikt, en zich van de fase norm emergence (opkomende norm) naar de fase norm cascade heeft verplaatst. Er is echter een spanning ontstaan: de terughoudendheid van de Veiligheidsraad om R2P toe te passen in Syrië (2012) wijst de andere kant uit. Er is dus nog een lange weg te gaan, voordat R2P als een internalised norm (vanzelfsprekende norm) kan worden beschouwd. ABSTRACT In March 2011, Muammar Gaddafi of Libya threatened to pull thousands of civilian protesters in the city of Benghazi out of their homes and kill them. The Security Council of the United Nations referred the crisis to the International Criminal Court, imposed a no-fly zone and provided NATO with a mandate to protect civilians by all necessary means, with the exception of ground troops. This operation was fast, robust and effective. It also marked the first time that the Responsibility to Protect (R2P) principle was fully implemented, being the responsibility of the international community to prevent and respond to genocide, crimes against humanity and war crimes if the state in question is not able or not willing to protect its citizens itself. Has R2P become a new norm? This study situates the case of Libya in the 'Norm Life Cycle' model of Constructivist theorists Finnemore and Sikkink (1998). It suggests that R2P has reached a tipping point and has moved from the stage of norm emergence to the stage of norm cascade. However, a certain tension still exists: the reluctance of the Security Council to implement R2P again in the crisis in Syria (2012)points in the opposite direction. This suggests there is still a long way to go before R2P becomes an internalised norm in the international community.

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The intervention in Libya: "The responsibility to Protect" as a new norm?

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Assessing peak aerobic capacity in Dutch law enforcement officers

Objectives: To cross-validate the existing peak rate of oxygen consumption (VO2peak) prediction equations in Dutch law enforcement officers and to determine whether these prediction equations can be used to predict VO2peak for groups and in a single individual. A further objective was to report normative absolute and relative VO2peak values of a sample of law enforcement officers in the Netherlands. Material and Methods: The peak rate of oxygen consumption (ml×kg–1×min–1) was measured using a maximal incremental bicycle test in 1530 subjects, including 1068 male and 461 female police officers. Validity of the prediction equations for groups was assessed by comparing predicted VO2peak with measured VO2peak using paired t-tests. For individual differences limits of agreement (LoA) were calculated. Equations were considered valid for individuals when the difference between measured and predicted VO2peak did not exceed ±1 metabolic equivalent (MET) in 95% of individuals. Results: None of the equations met the validity criterion of 95% of individuals having ±1 MET difference or less than the measured value. Limits of agreement (LoAs) were large in all predictions. At the individual level, none of the equations were valid predictors of VO2peak (ml×kg–1×min–1). Normative values for Dutch law enforcement officers were presented. Conclusions: Substantial differences between measured and predicted VO2peak (ml×kg–1×min–1) were found. Most tested equations were invalid predictors of VO2peak at group level and all were invalid at individual levels.

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Assessing peak aerobic capacity in Dutch law enforcement officers

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"Action research is an expression of the democratic spirit in social research" (Kemmis). Is this true?

The extent to which action research has a democratising influence - and the ethical pitfalls involved in the practice of action research. The conduct of action research within the organisational context and the practice community receives attention.

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Working = learning

To adequately deal with the challenges faced within residential care for older people, such as the increasing complexity of care and a call for more person-centred practices, it is important that health care providers learn from their work. This study investigates both the nature of learning, among staff and students working within care for older people, and how workplace learning can be promoted and researched. During a longitudinal study within a nursing home, participatory and democratic research methods were used to collaborate with stakeholders to improve the quality of care and to promote learning in the workplace. The rich descriptions of these processes show that workplace learning is a complex phenomenon. It arises continuously in reciprocal relationship with all those present through which both individuals and environment change and co-evolve enabling enlargement of the space for possible action. This complexity perspective on learning refines and expands conventional beliefs about workplace learning and has implications for advancing and researching learning. It explains that research on workplace learning is itself a form of learning that is aimed at promoting and accelerating learning. Such research requires dialogic and creative methods. This study illustrates that workplace learning has the potential to develop new shared values and ways of working, but that such processes and outcomes are difficult to control. It offers inspiration for educators, supervisors, managers and researchers as to promoting conditions that embrace complexity and provides insight into the role and position of self in such processes.

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

Prolonged electrical stimulation-induced gluteal and hamstring muscle activation and sitting pressure in spinal cord injury: Effect of duty cycle

(re)CYCLE Limburg

Resource-Efficient Image Buffer Architecture for Neighborhood Processors

Optimization of protocols using neuromuscular electrical stimulation for paralyzed lower-limb muscles to increase energy expenditure in people with spinal cord injury

The intervention in Libya: "The responsibility to Protect" as a new norm?

Assessing peak aerobic capacity in Dutch law enforcement officers

"Action research is an expression of the democratic spirit in social research" (Kemmis). Is this true?

Working = learning

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

Prolonged electrical stimulation-induced gluteal and hamstring muscle activation and sitting pressure in spinal cord injury: Effect of duty cycle

(re)CYCLE Limburg

Resource-Efficient Image Buffer Architecture for Neighborhood Processors

Optimization of protocols using neuromuscular electrical stimulation for paralyzed lower-limb muscles to increase energy expenditure in people with spinal cord injury

The intervention in Libya: "The responsibility to Protect" as a new norm?

Assessing peak aerobic capacity in Dutch law enforcement officers

"Action research is an expression of the democratic spirit in social research" (Kemmis). Is this true?

Working = learning