Specific Design Features Research Articles

The impact of self-lacing technology on foot containment during dynamic cutting

The sport of basketball requires repeated dynamic side-to-side movements that can cause foot sliding and place excessive stress on the athlete. Footwear that provides containment to reduce the motion of the foot relative to the shoe may have performance and injury prevention advantages. Foot containment can vary significantly across different types of footwear due to its dependence on the interaction between the shoe lacing system of the upper and specific design features within the shoe. This study used high-speed stereo radiography to assess the impact of a self-lacing system with three conditions of increasing lace tension compared to a control basketball shoe on foot containment by measuring foot–shoe motion during cutting and jab step activities. Twenty healthy athletes performed dynamic cutting activities in view of a unique stereo radiography system positioned to measure motion of specific foot bones while motion capture and perception data were also collected. By tracking bead positions on the foot and shoe, relative motion of the foot inside the shoe was measured along shoe planes during activity. The self-lacing system showed statistically significant reductions in foot–shoe motion of as much as 75.2% while performing dynamic basketball cuts. Controlling tension with the lacing system provides athletes flexibility in containment to go from a loose fit to a tight fit and reduce in-shoe motion by up to 39.3%. Furthermore, perception data showed athletes had 20.1% greater confidence to perform cutting tasks with increases in lace tension. Reduction of in-shoe foot motion with a self-lacing system is an important consideration in the design of footwear for performance athletes.

Blending the Subjective and Objective Realms of Sacred Architecture at the Pantheon: Creating a Comparative Framework for Evaluating Transformative Experiences in Ritual Contexts

This paper seeks to create a comparative framework for evaluating transformative experiences for different types of ritual contexts found in sacred architecture by bridging the gap between the phenomenology of human experience and architecture’s built conditions. The methodology creates a framework for statistical analysis, whereby evidence of people’s actual (i.e., real, lived) “subjective” experiences can be evaluated against the “objective” architectural conditions. The comparative framework is put to the test by comparing the experiential and environmental conditions found at the Pantheon in Rome. Experiential data for the Pantheon is extracted from Julio Bermudez’s large survey database (N = 2872) of “extraordinary architectural experiences” for this study. This data is compared against “objective” graphical architecture analysis using Lindsay Jones’ “morphology of ritual-architectural priorities” with a specific focus on ritual contexts. The quantitative and qualitative data reveals that the Pantheon produces transformative experiences for visitors that are related to the expected outcomes of specific design features. The percentages from the “objective” and “subjective” analysis both rank the priorities of theatre, contemplation, and sanctuary in the same order. This study concludes that built environments possessing a higher presence and quality of “ritual-architectural priorities” are more likely to be perceived as sacred and produce transformative experiences.

ТЕОРЕТИЧЕСКИЕ ИССЛЕДОВАНИЯ ДВИЖЕНИЯ ВОДЫ В ДОЖДЕВАТЕЛЯХ С ВРАЩАЮЩИМСЯ ДЕФЛЕКТОРОМ ШИРОКОЗАХВАТНЫХ ДОЖДЕВАЛЬНЫХ МАШИН

Domestic and foreign scientists have accumulated extensive experience in designing sprinklers and sprayers installed both on wide-span sprinklers and for watering flowerbeds and lawns. The base of recommendations for the choice of modifications, design parameters and operating modes, as a rule, included the results of experimental studies. The data obtained were determined by specific operating conditions, operating modes and specific design features of sprinklers. A generalized calculation method applicable for the purpose of designing sprinklers for certain purposes and conditions has not been identified. The purpose of the presented study is to study the movement of water in sprinklers with a rotating deflector in order to optimize design parameters and operating modes. The article considers the process of interaction of the water flow with the sprinkler deflector. The influence of the flow rate of the liquid supplied through the sprinkler on the size of the droplets of the sprayed liquid is presented. An increase in fluid flow leads to an increase in the diameter of the droplets. The trajectory of the grooves on the deflector has a significant impact on the formation of the speed and trajectory of the water droplets. The analysis shows that water acquires the greatest speed when leaving a rotating deflector having grooves of 3-5 mm in size at a flow rate of 1.5-3.5 l/s and small grooves of 1.5-2.5 mm occupying the area of the entire deflector at a low flow rate of up to 1.5 l/s. The conducted studies allowed us to consider the process of interaction of the fluid flow with the sprinkler deflector and develop a generalized calculation method. The results obtained were used in the design of the nomenclature of sprinklers for wide-reach sprinklers.

3-mm wavelength range radar altitude sensors

In this study, we analyse the specific features of design of 3-mm wavelength range radar altitude sensors based on domestic-made super high frequency modules М55323 and М55328. Some results of full-scale tests are given.

From content-centered logic to student-centered logic: can peer observation shift how faculty think about their teaching?

ABSTRACT This research investigates how peer observation programs can be designed to enhance faculty use of student-centered logic. Data include participants’ self-reports (interviews) and 50 hours of recorded faculty-faculty dialogue. Findings suggest specific design features that may increase fluency in student-centered logic. The study may be useful to academic developers interested in helping faculty move beyond content-centered, lecture-based approaches to teaching.

Analyzing Stability Conditions and Ore Dilution in Open Stope Mining

Ore dilution is a fundamental problem for the production process in underground mining operations. Especially in open stoping methods of underground mining, the continuous estimation, monitoring and treatment of instability issues is considered necessary in order to maintain the consistency of the production process. This paper aims to combine empirical nomograms of stability estimation and numerical approaches and thus link the extensive experiences of the empirical design and the quantitative data derived by numerical analyses. To facilitate this, a large number of different geomechanical conditions were modeled and analyzed in the pursuit of obtaining valid and applicable relationships between the empirical stability graphs’ approaches and the numerical simulation models. The parametric analysis was made to express the stability conditions and the dilution with specific design characteristics, using prevalent stability-graph approaches while the numerical models were tested using the RS2 software package. The obtained results include direct and easy-to-use mathematical expressions that can be applied during the initial design of the stoping process, especially for the case of sidewalls (hanging walls and foot walls). Furthermore, through the research, an initial proposal is made for a dilution-based stability graph that could be utilized for the early identification of dilution.

New materials and their application in the design and production of high-performance textile products

This paper provides a comprehensive description of the performance materials employed in a select group of high- performance textiles that are designed for a range of nontraditional applications. It also covers some design aspects of the individual products and explains the principles governing the specially engineered functional performance built into the products through the use of special materials and product design features. Among the applications covered is critical life saving applications falling under healthcare and personal protection categories.

Toward the Value Sensitive Design of eHealth Technologies to Support Self-management of Cardiovascular Diseases: Content Analysis.

BackgroundeHealth can revolutionize the way self-management support is offered to chronically ill individuals such as those with a cardiovascular disease (CVD). However, patients’ fluctuating motivation to actually perform self-management is an important factor for which to account. Tailoring and personalizing eHealth to fit with the values of individuals promises to be an effective motivational strategy. Nevertheless, how specific eHealth technologies and design features could potentially contribute to values of individuals with a CVD has not been explicitly studied before.ObjectiveThis study sought to connect a set of empirically validated, health-related values of individuals with a CVD with existing eHealth technologies and their design features. The study searched for potential connections between design features and values with the goal to advance knowledge about how eHealth technologies can actually be more meaningful and motivating for end users.MethodsUndertaking a technical investigation that fits with the value sensitive design framework, a content analysis of existing eHealth technologies was conducted. We matched 11 empirically validated values of CVD patients with 70 design features from 10 eHealth technologies that were previously identified in a systematic review. The analysis consisted mainly of a deductive coding stage performed independently by 3 members of the study team. In addition, researchers and developers of 6 of the 10 reviewed technologies provided input about potential feature-value connections.ResultsIn total, 98 connections were made between eHealth design features and patient values. This meant that some design features could contribute to multiple values. Importantly, some values were more often addressed than others. CVD patients’ values most often addressed were related to (1) having or maintaining a healthy lifestyle, (2) having an overview of personal health data, (3) having reliable information and advice, (4) having extrinsic motivators to accomplish goals or health-related activities, and (5) receiving personalized care. In contrast, values less often addressed concerned (6) perceiving low thresholds to access health care, (7) receiving social support, (8) preserving a sense of autonomy over life, and (9) not feeling fear, anxiety, or insecurity about health. Last, 2 largely unaddressed values were related to (10) having confidence and self-efficacy in the treatment or ability to achieve goals and (11) desiring to be seen as a person rather than a patient.ConclusionsPositively, existing eHealth technologies could be connected with CVD patients’ values, largely through design features that relate to educational support, self-monitoring support, behavior change support, feedback, and motivational incentives. Other design features such as reminders, prompts or cues, peer-based or expert-based human support, and general system personalization were also connected with values but in narrower ways. In future studies, the inferred feature-value connections must be validated with empirical data from individuals with a CVD or similar chronic conditions.

Benchmark Analysis on Loss-of-Flow-without-Scram Test of FFTF Using Refined SAC-3D Models

The Fast Flux Test Facility (FFTF) is a liquid sodium-cooled nuclear reactor designed by the Westinghouse Electric Corporation for the U.S. Department of Energy. In July 1986, a series of unprotected transients were performed to demonstrate the passive safety of FFTF. Among these, a total of 13 loss-of-flow-without scram (LOFWOS) tests were conducted to confirm the liquid metal reactor safety margins, provide data for computer code validation, and demonstrate the inherent and passive safety benefits of specific design features. In our preliminary work, we have performed relatively coarse modeling of the FFTF. To better predict the transient behavior of FFTF LOFWOS test #13, we modeled it using a more refined thermal-hydraulics model. In this paper, we simulate FFTF LOFWOS test #13 with the system safety analysis code SAC-3D according to the benchmark specifications provided by Argonne National Laboratory (ANL). The simulation range includes the primary and secondary circuits. The reactor core was modeled by the built-in 3D neutronics calculation module and the parallel-channel thermal-hydraulics calculation module. To better predict the reactivity feedback introduced by coolant level variations within the GEMs, a real-time macro cross-section homogenization processing module was developed. The steady-state power distribution was calculated as the transient simulation initial boundary conditions. In general, both the steady-state calculation results and the whole-plant transient behavior predictions are in good agreement with the measured data. The relatively large deviations in transient simulation occur in the outlet temperature predictions of the PIOTA in row 6. It can be preliminarily explained by the reason for neglecting the heat transfer between channels in this model.

What Form would Referendums on Irish Unification take?

AbstractThe Belfast or Good Friday Agreement of 1998 makes provision for Northern Ireland to leave the United Kingdom and join a united Ireland through a unification referendum, if voters so wish. Yet, the provision is short on detail and has not been substantively explored. A Working Group on Unification Referendums on the Island of Ireland has recently sought to address this gap. In this article, the Working Group's chair and research assistant outline the project's methodology and key findings, covering overall referendum configurations and specific design features, as well as what steps might be taken in the coming years. The article also highlights two comparative lessons, relating to tensions between the values of informed consent and inclusive design, and between majoritarian and consensual politics. These tensions afflict many referendums, particularly on sovereignty questions. They cannot be resolved, but only tempered, through careful and inclusive design of referendum processes.

Advanced Packaging Technology for Novel 1-dimensional and 2-dimensional VCSEL Arrays

Abstract In this paper we present an optimized manufacturing technique for special long-wavelength 1-dimensional and 2-dimensional Vertical Cavity Surface Emitting Laser Diode (VCSEL) arrays with focus on die bonding and a special wire bonding process as well as additional possibilities to make the manufacturing more productive and to increase the product quality, reliability, and life time. VCSEL arrays have a very broad application potential. Objective of this paper is the development of an assembly technology for long-wavelength VCSEL arrays with high positioning accuracy for automated production with high total yield, using gold-based conductive glue (because silver migration is a concern) securing high yield and extremely high reliability and lifetime. Due to special customer requirements, a final thickness of the conductive glue of 35 micron with low standard deviation is necessary. For highest reliability, gold wire bonding of the top side contact of the VCSEL to a silicon substrate with gold metallization has been a customer requirement. With the described technique we develop and produce customer specific products with dedicated wavelength, performance, and packaging options. Bases on our findings, very flexible and scalable solutions are possible, matching many different applications. Finally, we will present an overview of our results on the physical and electro-optical characterization of the VCSEL devices. This yielded a very productive manufacturing technique, meeting the requirements mentioned above. Special design features of the VCSEL ensure that the relatively high thermal resistance of the cured conductive glue layer does not impair the electro-optical properties or the lifetime of the VCSELs. For the interconnection of the top side contact we used gold wire with 20 microns diameter, using ball-wedge, Stand-Off Stich Bond process with special loop geometry, required by the customer. Due to the properties of the semiconductor material of the VCSELs a low bonding temperature is required, enabled by our special wire bonding process. Gold wire bonding delivered excellent results, by far exceeding the customer specification. The optical spectrum of the VCSELs and other measurements indicate that the assembly processes do not harm the laser diodes or their electro-optical properties. All customer requirements for the 1-dimensional and 2-dimensional VCSEL arrays have been met. The electro-optical and burn-in data furnished proof of the quality of the engineered assembly technology. The technologies developed for low current as well as high current laser arrays will enable new devices for a huge amount of new applications because of the novel manufacturing processes as well as innovative packaging of the VCSEL arrays.

Visual communication in social play of a hierarchical carnivore species: the case of wild spotted hyenas.

Communication relies on signals that can be produced via different sensory modalities to modify receivers’ behavior. During social interactions, the possibility to perceive subtle visual cues enhances the use of facial expressions to exchange information. One of the most appropriate fields to explore the specific design features of visual signals is play fighting. Here, we explored the production and potential role of Relaxed Open Mouth (ROM) and Head Bobbing (HB) in regulating play fighting of wild spotted hyenas Crocuta crocuta, a highly hierarchical carnivore species. In accordance with the assumptions of the signal optimization theory, wild hyenas produced ROM and HB almost exclusively when the sender was in direct visual contact with the receiver thus suggesting that senders were attentive to the playmates’ face. Contrary to HB, the sequential analysis revealed that ROM often anticipated offensive patterns such as play biting thus supporting the hypothesis that ROM, but not HB, is a metacomunicative signal. Moreover, when the offensive patterns were biased toward one of the 2 players, the session was punctuated by a higher number of ROMs. Our findings support the general hypothesis that these 2 visual signals can play different roles in the management of play fighting in this carnivore species. The complementary use of ROM and HB would suggest that spotted hyenas are highly competent and fast in processing facial displays of different nature to correctly “read others’ intentions” and respond with appropriate motor actions to avoid misunderstanding during one of the most multifaceted and risky social interaction.

Dynamic Instability Analysis of a Double-Blade Centrifugal Pump

The flow instability of a double-blade centrifugal pump is more serious due to its special design feature with two blades and large flow passages. The dynamic instabilities and pressure pulsations can affect the pump performance and operating lifetime. In the present study, a numerical investigation of unsteady flow and time variation of pressure within a complete double-blade centrifugal pump was carried out. The time domain and frequency domain of pressure pulsations were extracted at 16 monitoring locations covering the important regions to analyze the internal flow instabilities of the pump model. The frequency spectra of pressure pulsations were decomposed into Strouhal number dependent functions. This led to the conclusion that the blade passing frequency (BPF) related vibrations are exclusively flow-induced. Large vortices were observed in the flow passages of the pump at low flow rate. It is noted that high vorticity magnitude occurred in the vicinities of the blade trailing edge and tongue of the volute, due to the rotor-stator interaction between impeller and volute.

Evaluation of the design and materials of anti-vibration gloves: Impact on hand dexterity and forearm muscle activity

Many anti-vibration gloves are available in the market but there are lacks of understanding of their effectiveness in facilitating various hand movements. This study addresses the knowledge gap through a wear trial with five types of anti-vibration gloves made of chloroprene rubber and spacer fabric. Surface electromyography of three forearm muscles of 16 male subjects was conducted during gripping, key pinching, woodblock transporting, screw inserting and screw driving tasks. The correlation between the compression properties of the gloves and hand performance was also evaluated. The results show that hand dexterity is inhibited and more muscle activity is needed to carry the woodblocks with the spacer fabric glove without special design features. A thicker glove can reduce the demand of the flexor digitorum superficialis muscle when using an impact driver. A thinner dorsal side and tailored padding can enhance hand dexterity. The findings can be used as a reference for designing anti-vibration gloves.

The immediate effects of foot orthosis geometry on lower limb muscle activity and foot biomechanics

Foot orthoses (FOs) are used to treat clinical conditions by altering the external forces applied to the foot and thereafter the forces of muscles and tendons. However, whether specific geometric design features of FOs affect muscle activation is unknown. The aim of this study was to investigate if medial heel wedging and increased medial arch height have different effects on the electromyography (EMG) amplitude of tibialis posterior, other muscles of the lower limb and the kinematics and kinetics at the rearfoot and ankle. Healthy participants (n = 19) walked in standardised shoes with i) a flat inlay; ii) a standard shape FOs, iii) standard FOs adjusted to incorporate a 6 mm increase in arch height, iv) and standard FOs adjusted to incorporate an 8° medial heel wedging and v) both the 6 mm increase in arch height and 8° increase in medial wedging. EMG was recorded from medial gastrocnemius, peroneus longus, tibialis anterior and in-dwelling tibialis posterior muscles. Motion and ground reaction force data were collected concurrently. Tibialis posterior EMG amplitude reduced in early stance with all FOs (ηp2 = 0.23–1.16). Tibialis posterior EMG amplitude and external ankle eversion moment significantly reduced with FOs incorporating medial wedging. The concurrent reduction in external eversion moment and peak TP EMG amplitude in early stance with medial heel wedging demonstrates the potential for this specific FOs geometric feature to alter TP activation. Medial wedged FOs could facilitate tendon healing in tibialis posterior tendon dysfunction by reducing force going through the TP muscle tendon unit.

Exclusive Rights Stimulate Design Around: How Circumventing Edison’s Lamp Patent Promoted Competition and New Technology Development

ABSTRACT Designing around patents is prevalent but not often appreciated as a means by which patents promote economic development through competition. We provide a novel empirical study of the extent and timing of designing around patent claims. We study the filing rate of incandescent lamp-related patents during 1878–1898 and find that the enforcement of Edison’s incandescent lamp patent in 1891–1894 stimulated a surge of patenting. We studied the specific design features of the lamps described in these lamp patents and compared them with Edison’s claimed invention to create a count of noninfringing designs by filing date. Most of these noninfringing designs circumvented Edison’s patent claims by creating substitute technologies to enable participation in the market. Our forward citation analysis of these patents shows that some had introduced pioneering prior art for new fields. This indicates that invention around patents is not duplicative research and contributes to dynamic economic efficiency. We show that the Edison lamp patent did not suppress advance in electric lighting and the market power of the Edison patent owner weakened during this patent’s enforcement. We propose that investigation of the effects of design around patents is essential for establishing the degree of market power conferred by patents. JEL: D21 - Firm Behavior: Theory, D22 - Firm Behavior: Empirical Analysis, K11 - Property Law, K21 - Antitrust Law, L12 - Monopoly; Monopolization Strategies, N8 - Micro-Business History, O31 - Innovation and Invention: Processes and Incentives, O32 - Management of Technological Innovation and R&D, O33 - Technological Change: Choices and Consequences, O34 - Intellectual Property and Intellectual Capital

Current COVID-19 vaccine trials in high-income countries: are placebo-controlled trials ethical?

Current COVID-19 vaccine trials in high-income countries: are placebo-controlled trials ethical?

Exploring how intervention characteristics affect implementability: A mixed methods case study of common elements-based academic support in child welfare services

BackgroundProminent implementation theories and frameworks articulate characteristics of interventions (e.g., contextual alignment) as important determinants of successful implementation in natural practice settings. Yet, few studies have explored such characteristics in-depth. Research is needed to understand how and why interventions' characteristics can make them more or less implementable in their intended practice settings. Child Welfare Services (CWSs) need evidence-informed academic interventions to help children's current and prospective wellbeing. CWSs are complex implementation contexts that likely need interventions to be highly implementable. This mixed-methods case study explored the implementability of Enhanced Academic Support (EAS), a co-designed common elements-based academic intervention for children and families in CWSs, and how characteristics such as flexibility and contextual alignment influenced its implementability. MethodsWe used a fully integrated mixed-methods design and collected data from 24 practitioners and supervisors from three Norwegian CWSs. Quantitative data included measures of intervention feasibility, acceptability, appropriateness, and usability. Qualitative data included focus groups, individual interviews, and feedback logs. Quantitative analyses were descriptive, and qualitative analyses mixed deductive and inductive coding and interpretation. Mixed analyses used convergence and expansion. ResultsEAS scored 75.33 (SD = 15.57) out of 100 on the implementability index, and convergence with qualitative data indicates that EAS is implementable for most practitioners in CWS, but not all. The core element structured tutoring was occasionally inappropriate with families. Specific content and design characteristics influenced implementability through different mechanisms. The influence could be positive or negative depending on practitioners' preferences and values and their perceptions about appropriateness for clients. Flexibility was a multi-faceted characteristic with potential benefits and pitfalls for implementation. Flexible cross-domain integration of core elements of EAS into other supports was crucial. DiscussionPerceptions about implementability can vary within groups of practitioners, which may call for designing for differentiation in interventions and implementations. Cross-domain integration may be a promising design characteristic for interventions in complex practice settings. Limitations in implementability and competing priorities may cause paradoxes where those children who need academic support the most may receive less of it.

GeoForge: investigating integrated virtual reality and personalized websites for collaboration in middle school science

Purpose This paper aims to describe the design and user testing of GeoForge, a multiple-player digital learning experience for middle school that leverages virtual reality (VR) and individualized websites for learning concepts in planetary science. This paper investigates how specific instructional design choices and features of the technology fostered collaborative behaviors. Design/methodology/approach GeoForge was implemented in 3 middle school classrooms with a total of 220 students. Learners used GeoForge in class in groups of 3–4 to learn about planetary science. A mixed-methods approach examined collaboration using classroom observations, teacher interviews, student surveys and student artifacts. Using Jeong and Hmelo-Silver’s (2016) seven affordances of technology for collaborative learning, this paper identifies ways in which features of GeoForge supported collaborative behaviors. Findings Instructional design which combined VR and the digital science journal (DSJ) helped foster collaboration. Some collaborative behaviors were especially notable in classrooms that did not regularly practice these skills. Segmenting tasks in the DSJ, clarifying instructions to articulate ideas, showing other group members’ responses onscreen and enabling multiuser VR environments contributed to collaborative behaviors and a satisfying learning experience as observed and documented through multiple methods. Originality/value GeoForge successfully integrated VR and personalized websites in a classroom planetary science lesson, an approach which balanced instructional design and logistical challenges while creating opportunities for collaboration.

Experiences with using a mobile application for learning evidence-based practice in health and social care education: An interpretive descriptive study.

Health and social care students are expected to apply evidence-based practice (EBP). An innovative mobile application, EBPsteps, was developed to support learning EBP. The aim of this study was to explore health and social care students' experiences of learning about EBP using the mobile application EBPsteps during their clinical placements. An interpretive description approach guided the exploration of student experiences. Four focus groups were conducted with a convenience sample of students from three undergraduate degree programs: occupational therapy, physical therapy, and social education. The constant comparison method was used to categorize and compare the qualitative data. Three integrated themes were generated: "triggers for EBP", "barriers to EBP", and "design matters". Information needs, academic requirements, and encouragement from clinical instructors triggered the students to use EBPsteps. Lack of EBP knowledge, lack of academic demand, and lack of emphasis on EBP in clinical placement were barriers to using EBPsteps. Design issues mattered, as use of the app was motivated by design features such as the opportunity to practice EBP in one place and taking notes in a digital notebook. The use of the app was hindered by anticipation that the use of phones during clinical placements would be viewed negatively by others and by specific design features, such as unfamiliar icons. The students perceived the EBPsteps app as a relevant tool for learning EBP, although they also suggested specific changes to the design of the app. Requirements must be embedded in the curriculum to ensure that the app is used. Our findings bring important information to developing and implementing mobile applications as a teaching method in health and social care educations.