Contextual Variation Research Articles

Electric vehicle forecasts: a review of models and methods including diffusion and substitution effects

ABSTRACT Governments worldwide are investing in innovative transport technologies to foster their development and widespread adoptions. Since accurate predictions are essential for evaluating public policies, great efforts have been devoted to forecast the potential demand and adoption times of these innovations. However, this proves to be challenging, and it often fails to deliver accurate predictions. Learning a lesson to guide future work is critical but difficult because forecast figures depend on modelling methods and assumptions, and exhibit a great variability in methodologies, data and contexts. This paper provides a critical review of the models and methods employed in the literature to forecast the demand for electric vehicles (EVs), with a focus on the methods for incorporating choice behaviour into diffusion modelling. The review complements and extends previous works in three ways: (1) it focuses specifically on the ways in which fuel type choice has been incorporated into diffusion models or vice-versa; (2) it includes a discussion on forecast accuracy, contrasting the predictions with the actual figures available and estimating an average root mean square error and (3) it compares models and methods in terms of their strengths and limitations, and their implications in forecasting accuracy. In doing that, it also contributes discussing the literature published between 2019 and 2021. The analysis shows that EV demand estimation requires solving the non-trivial issue of jointly modelling the factors that induce diffusion in a social network and the instrumental and psychological elements that might favour household adoption considering the available alternatives. Mixed models that integrate disaggregate micro-simulation tools to capture social interaction and discrete choice models for individual behaviour appear as an interesting approach, but like almost all methods analysed failed to deliver satisfactory results or accurate predictions even when using sophisticated modelling techniques. Further improvement in various components is still needed, in particular in the input data, which regardless of the method used, is key to the accuracy of any forecasting exercise.

Operative Trauma Courses: A Scoping Review to Inform the Development of a Trauma Surgery Course for Low-Resource Settings.

A multitude of operative trauma courses exist, most of which are designed for and conducted in high-resource settings. There are numerous barriers to adapting such courses to low- and low-middle-income countries (LMICs), including resource constraints and contextual variations in trauma care. Approaches to implementing operative trauma courses in LMICs have not been evaluated in a structured manner. We conducted a scoping review of the literature including databases (e.g., PubMed, Web of Science, EMBASE), grey literature repositories, and structured queries of publicly available course materials to identify records that described operative trauma courses offered since 2000. The search identified 3,518 non-duplicative records, of which 48 relevant reports were included in analysis. These reports represented 23 named and 11 unnamed operative trauma courses offered in 12 countries. Variability existed in course format and resource requirements, ranging from USD 40 to 3,000 per participant. Courses incorporated didactic and laboratory components, which utilized simulations, cadavers, or live animals. Course content overlapped significantly but was not standardized. Data were lacking on course implementation and promulgation, credentialing of instructors, and standardized evaluation metrics. While many operative trauma courses have been described, most are not directly relatable to LMICs. Barriers include cost-prohibitive fees, lack of resources, limited data collection, and contextual variability that renders certain surgical care inappropriate in LMICs. Gaps exist in standardization of course content as well as transparency of credentialing and course implementation strategies. These issues can be addressed through developing an open-access operative trauma course for low-resource settings.

A quality improvement approach in co-developing a primary healthcare package for raising awareness and managing female genital schistosomiasis in Nigeria and Liberia.

Girls and women living in endemic areas for urogenital schistosomiasis may have lifelong vulnerability to female genital schistosomiasis (FGS). For >2decades, the importance of FGS has been increasing in sub-Saharan Africa, but without established policies for case detection and treatment. This research aimed to understand the level of FGS knowledge of frontline health workers and health professionals working in endemic areas and to identify health system needs for the effective management of FGS cases and prevention of further complications due to ongoing infections. Workshops were conducted with health workers and stakeholders using participatory methods. These workshops were part of a quality improvement approach to develop the intervention. Health workers' and system stakeholders' knowledge regarding FGS was low. Participants identified key steps to be taken to improve the diagnosis and treatment of FGS in schistosomiasis-endemic settings, which focused mainly on awareness creation, supply of praziquantel, development of FGS syndromic management and mass administration of praziquantel to all eligible ages. The FGS intervention component varies across countries and depends on the health system structure, existing facilities, services provided and the cadre of personnel available. Our study found that co-developing a new service for FGS that responds to contextual variations is feasible, promotes ownership and embeds learning across health sectors, including healthcare providers, NTD policymakers and implementers, health professionals and community health workers.

Contextual Variability of Responsive Utterances in Blog Interaction Compared to Face-to-Face Communication

Contextual Variability of Responsive Utterances in Blog Interaction Compared to Face-to-Face Communication

Contextual variation on teachers’ conceptions of ICT-enhanced teaching in engineering education

Due to the COVID-19 epidemic, higher education all over the world is increasingly reliant on the use of Information and Communication Technology (ICT), which creates several opportunities and problems, especially in the field of engineering education. One of the significant aspects that needs to be bought to the academic attention is how teachers' use of ICT in engineering education has been transformed due to this pandemic. Therefore, the purpose of this study was to investigate views, and practices that define varying conceptions of engineering university teachers’ use of ICT in their teaching. Phenomenography, an emerging research approach in engineering education was used as a theoretical and methodological underpinning. A cohort of 14 teachers was selected from two universities in Bangladesh to participate in a semi-structured in-depth interview. The findings revealed five qualitatively different categories of description such as: imparting information, transmitting structured knowledge, offering guided learning, engaging students toward practice and engaging students toward innovation. Relationships among the categories of description revealed four dimensions of variation such as: purpose of using ICT in engineering teaching, role of a teacher, role of a student and TPACK components. The study further found that ICT-usage underpins teacher’s pedagogical approach to teaching engineering subjects and therefore provides useful information for university policy makers, teachers and curriculum designers toward quality teaching and learning. A quantitative investigation to determine the impact of the pedagogical approaches to teaching underpinned by ICT-use in engineering education is recommended.

Comparing online versus in-person auditory experiments on talker adaptation

Online experiments are increasingly used as an alternative to in-person lab-based experiments. While online experimental platforms offer convenience, conducting auditory experiments online also presents several challenges, including variations in latency and jitter in auditory stimulus presentation across participants’ devices. Therefore, it is important to carefully examine whether response time data collected online are comparable to the reliability and precision of data collected in well-controlled laboratory settings. Here, we directly compared whether well-documented context- and talker-adaptation effects on response times are replicable between the laboratory and an online platform. Participants (N = 58) performed an established word identification task measuring response time in a 2 × 2 manipulation of context (isolated words versus continuous speech) and talker variability (single versus mixed talkers). The results from the laboratory session, but not the online platform, reliably replicated all main and interaction effects found in prior laboratory-based studies. While mean response times were comparable between environments, the variance of online data was significantly greater than in the lab, even after discarding outliers. These results suggest that careful considerations are needed when implementing online experiments that depend on precise auditory timing, particularly in considering how greater measurement error will impact power, sample sizes, and statistical inferences.

Implicit cross-situational word learning in children with and without developmental language disorder and its relation to lexical-semantic knowledge

IntroductionResearch indicates that statistical learning plays a role in word learning by enabling the learner to track the co-occurrences between words and their visual referents, a process that is named cross-situational word learning. Word learning is problematic for children with developmental language disorder (DLD), and a deficit in statistical learning has been suggested to contribute to the language difficulties in these children. Therefore, we investigate whether children with DLD have more difficulty than TD children with learning novel word–referent pairs based on cross-situational statistics in an implicit task, and whether this ability is related to their lexical-semantic skills. Moreover, we look at the role of variability of the learning environment.MethodsIn our implicit cross-situational word learning task, each trial in the exposure phase was in itself ambiguous: two pictures of unknown objects were shown at the same time and two novel words were played consecutively, without indicating which word referred to which object. However, as every word occurred with its correct referent consistently, the children could learn the word–referent pairs across trials. The children were not explicitly instructed to learn the names of new objects. As an on-line measure of learning, eye-movements were recorded during the exposure phase. After exposure, word–referent knowledge was also tested using multiple choice questions. Several measures of lexical-semantic knowledge were administered to the children with DLD, as well as tasks measuring non-verbal intelligence and phonological processing. Contextual variability (the number of different distractors with which a particular word–referent pair occurs across trials) was manipulated between subjects by constructing two types of exposure conditions: low contextual diversity vs. high contextual diversity.ResultsBoth groups of children performed significantly above chance level on the test phase, but the TD children significantly outperformed the children with DLD. We found no significant effect of contextual diversity. The eye-tracking data revealed some evidence of on-line learning, but no differences between groups. Finally, the regression analyses did not reveal any significant predictors of off-line or on-line cross-situational word learning ability.DiscussionOur results indicate that although children with DLD are able to learn word-referent pairs in an implicit task, they have more difficulty than TD children. Possibly they need more input to achieve the same level.

Personrettet og genstandsrettet virksomhed

In activity theory the conceptual framework is developed using a binary and hierarchical approach in the reconstruction of the culture-historical evolution and by focusing on the development of tools as the very origin of human species. One of the results is subordination of person related activity (as a non-specific human configuration) below object related activity. The specific character and importance of person related activity for the human species is thereby concealed. It is suggested that the hierarchical approach should be avoided. Three kinds of activities should be conceptualized non-hierarchically: 1. the object related activity, 2.the person related activity and 3. the activity related to social structures. Analytically it would be possible to regard the activity types as independent aspects with specific characters; but emphasis is put on the faet that neither of the activity types can be understood as universal in the human and social context. They are equally important and integrated aspects of human activity, whose mutual relative manifestations would be subject to contextual variations.

Using contextual data to predict risky driving events: A novel methodology from explainable artificial intelligence

Usage-based insurance has allowed insurers to dynamically tailor insurance premiums by understanding when and how safe policyholders drive. However, telematics information can also be used to understand the driving contexts experienced by the driver within each trip (e.g., road types, weather, traffic). Since different combinations of these conditions affect exposure to accidents, this understanding introduces predictive opportunities in driving risk assessment. This paper investigates the relationships between driving context combinations and risk using a naturalistic driving dataset of 77,859 km. In particular, XGBoost and Random Forests are used to determine the predictive significance of driving contexts for near-misses, speeding and distraction events. Moreover, the most important contextual factors in predicting these risky events are identified and ranked through Shapley Additive Explanations. The results show that the driving context has significant power in predicting driving risk. Speed limit, weather temperature, wind speed, traffic conditions and road slope appear in the top ten most relevant features for most risky events. Analysing contextual feature variations and their influence on risky events showed that low-speed limits increase the predicted frequency of speeding and phone unlocking events, whereas high-speed limits decrease harsh accelerations. Low temperatures decrease the expected frequency of harsh manoeuvres, and precipitations increase harsh acceleration, harsh braking, and distraction events. Furthermore, road slope, intersections and pavement quality are the most critical factors among road layout attributes. The methodology presented in this study aims to support road safety stakeholders and insurers by providing insights to study the contextual risk factors that influence road accident frequency and driving risk.

Interarticulator Speech Coordination: Timing Is of the Essence.

In skilled speech production, sets of articulators, such as the jaw, tongue, and lips, work cooperatively to achieve task-specific movement goals, despite rampant contextual variation. Efforts to understand these functional units, termed coordinative structures, have focused on identifying the essential control parameters responsible for allowing articulators to achieve these goals, with some research focusing on temporal parameters (relative timing of movements) and other research focusing on spatiotemporal parameters (phase angle of movement onset for one articulator, relative to another). Here, both types of parameters were investigated and compared in detail. Ten talkers recorded nonsense, disyllabic /tV#Cat/ utterances using electromagnetic articulography, with alternative V (/ɑ/-/ɛ/) and C (/t/-/d/), across variation in rate (fast-slow) and stress (first syllable stressed-unstressed). Two measures were obtained: (a) the timing of tongue-tip raising onset for medial C, relative to jaw opening-closing cycles and (b) the angle of tongue-tip raising onset, relative to the jaw phase plane. Results showed that any manipulation that shortened the jaw opening-closing cycle reduced both the relative timing and phase angle of the tongue-tip movement onset, but relative timing of tongue-tip movement onset scaled more consistently with jaw opening-closing across rate and stress variation. These findings suggest the existence of an intrinsic timing mechanism (or "central clock") that is the primary control parameter for coordinative structures, with online compensation then allowing these structures to achieve their goals spatially. https://doi.org/10.23641/asha.22144259.

Household determinants of continued adoption of sustainable land management measures in central Ethiopia

The government of Ethiopia has undertaken several projects to restore degraded farmlands using a variety of sustainable land management (SLM) techniques. One of the critical elements of the program was the rehabilitation of farmlands using physical soil and water conservation (SWC) strategies. This study examines household determinants of continued SWC adoption performances using areas representing a variety of contexts. The analysis was conducted using a binary logit model based on data collected from 525 sample households in two districts, namely Kewet and Sebeta-hawas. Of the study participants, 276 households were from the Kewet district in the Amhara region, and 249 households were from Sebeta-hawas in the Oromia region. The study findings revealed a significant difference between sampled households in the study areas regarding continued adoption performances, i.e. (25%) in the Sebeta-hawas and (41%) in the Kewet districts. Among others, productivity gains, consistent follow-up, sufficient farm labor, livestock holding, assistance-free efforts, the experience of soil erosion risks, and sloppy farm plots provided incentives for households to embrace the already introduced measures. Aside from that, there appeared to be differences in the relative contributions and significance of determinants influencing the likelihood of continued adoption. The important conclusion is that adoption effectiveness may differ under different circumstances and agro-ecosystems. Variables influencing continued adoption are also context-specific. Thus, decision-makers should consider contextual variations in designing policies and strategies that promote adoption continuities and utilizations.

Insights into resource management and technological development through microbotanical and geoarchaeological characterisation of floor plasters from Neolithic Abu Hureyra, Syria, 8600-6000 cal. BC

Plaster is a key technological innovation, manufactured and widely used during the Neolithic across SW Asia. Pre-pottery Neolithic B (PPNB) site, Tell Abu Hureyra, 8600-6000 cal. BC, located in the Middle Euphrates, Syria, has contributed significant evidence to our understanding of the development and construction of early farming settlements. Key features of the site's built environment include rectilinear mudbrick structures, painted plaster floors and substantial storage vessels. To investigate these technological developments, chronological and contextual variation in human resource selection, this pilot study integrates analysis of phytoliths, faecal spherulites and geochemical characterisation by pXRF, of multiphase floor plasters from Abu Hureyra. The ubiquity of faecal spherulites present in the plaster matrix indicate animal dung was an important resource for floor plaster construction at Abu Hureyra. A high proportion of the plant remains identified within the plaster matrix through phytolith analysis are likely also dung derived and indicate a mixed foddering regime of managed animals. Consistencies in the plaster make-up reveal traditions and sustainable practices which likely spanned several millennia. Differences in plaster technology when compared to other sites within the same resource catchment area suggest localised, site-specific preferences and cultures may have influenced technological choices.

Linguistic disfluencies in Russian-speaking typically and atypically developing children: individual variability in different contexts

ABSTRACT Disfluency in children and adults seems to occur like errors of speech but, at the same time, is an essential feature of spontaneous (unprepared) speech. The present study aimed to evaluate linguistic disfluencies in typically and atypically developing Russian-speaking children from the perspective of the dynamic adaptive model of self-monitoring in speech production. The study collected four language samples from 10 six-year-old children with developmental language disorder and 14 typically developing peers: two storytelling tasks, structured conversation, and a play argument. After transcribing audio-recordings and marking linguistic disfluencies, the authors conducted structured distributional analysis. The distribution of several indexes of disfluency was estimated to assess the prevalence and profiles of different (sub)types of disfluencies. The disfluency rate statistics were similar between the typically developing children and children with developmental language disorder. The distributional indexes score showed that tasks significantly impacted the rate of different (sub)types of disfluencies. Task-related patterns in a set of the distributional indexes significantly distinguished the groups. Thus, changes in the disfluency profile related to different external factors, as a sign of a flexibility of an adaptive self-monitoring system, may be limited in children with developmental language disorder.

A Literature Review on the Role of Hope in Promoting Positive Youth Development across Non-WEIRD Contexts

Theoretical and empirical evidence has identified hope as a key adolescent strength that is linked to positive youth developmental outcomes. Although hope must be understood from a cultural lens, most of the evidence regarding adolescent hope is derived from samples of white youth from Western, educated, industrialized, rich, and democratic (WEIRD) nations. Therefore, in order to have a more comprehensive and global understanding of the antecedents, outcomes, and processes of hope, we apply a positive youth development perspective in order to review the literature (N = 52 studies) on hope from diverse cultural and international contexts. In organizing the findings by global region, our review provides evidence of the shared function of hope in promoting positive youth developmental outcomes and the usefulness of the Child Hope Scale across contexts. Family and parental relationships were identified as key assets in promoting hope; however, there exists cultural and contextual variation in what aspects of these relationships promote hope. We conclude this review by considering the priorities for research, practice, and policy, based on these findings.

Contextual variation in beliefs about emotion and associated emotion regulation efforts

Contextual variation in beliefs about emotion and associated emotion regulation efforts

Aspirations and realities of intergovernmental collaboration in national- level interventions: insights from maternal, neonatal and child health policy processes in Nigeria, 2009–2019

In Nigeria’s federal government system, national policies assign concurrent healthcare responsibilities across constitutionally arranged government levels. Hence, national policies, formulated for adoption by states for implementation, require collaboration. This study...

Beyond the Dormitory Labour Regime: Comparing Chinese and Indian Workplace–Residence Systems as Strategies of Migrant Labour Control

This article explores two examples of worker housing in India, and compares these with China’s ‘dormitory labour regime’, arguing that these methods of labour accommodation are part of a broader, increasingly global, workplace-residence regime aimed at migrant labour control for the purposes of value extraction. Contrary to previous studies, it argues that China’s system is not unique, but part of the political economy of contemporary global capitalism. Although there exist historical and contextual variations between the two Indian case studies, drawn from the Delhi National Capital Region (NCR) garment sector and the Andhra Pradesh electronics industry, as well as between the Indian and Chinese contexts, the aims and many of the outcomes are similar. Moving beyond a focus on the country- and space-specific ‘dormitory labour regime’ facilitates a broader understanding of the crucial role contemporary workplace-residence systems play in enhancing control of migrant labour for the benefit of global accumulation networks.

Innovative Solutions Based on the EM-Algorithm for Covariance Structure Detection and Classification in Polarimetric SAR Images

This article addresses the challenge of identifying the polarimetric covariance matrix (PCM) structures associated with a polarimetric synthetic aperture radar (SAR) image. Interestingly, such information can be used, for instance, to improve the scene interpretation or to enhance the performance of (possibly PCM-based) segmentation algorithms as well as other kinds of methods. To this end, a general framework to solve a multiple hypothesis test is introduced with the aim to detect and classify contextual spatial variations in polarimetric SAR images. Specifically, under the null hypothesis, only one unknown structure is assumed for data belonging to a two-dimensional spatial sliding window, whereas under each alternative hypothesis, data are partitioned into subsets sharing different PCM structures. The problem of partition estimation is solved by resorting to hidden random variables representative of covariance structure classes and the expectation–maximization algorithm. The effectiveness of the proposed detection strategies is demonstrated on both simulated and real polarimetric SAR data also in comparison with existing classification algorithms.

Circumstances for treatment and control of invasive Enterobacterales infections in eight hospitals across sub-Saharan Africa: a cross-sectional study.

Background: Bloodstream infections caused by Enterobacterales show high frequency of antimicrobial resistance (AMR) in many Low- and Middle-Income Countries. We aimed to describe the variation in circumstances for management of such resistant infections in a group of African public-sector hospitals participating in a major research study. Methods: We gathered data from eight hospitals across sub-Saharan Africa to describe hospital services, infection prevention and antibiotic stewardship activities, using two WHO-generated tools. We collected monthly cross-sectional data on availability of antibiotics in the hospital pharmacies for bloodstream infections caused by Enterobacterales. We compared the availability of these antibiotics to actual patient-level use of antibiotics in confirmed Enterobacterales bloodstream infections (BSI). Results: Hospital circumstances for institutional management of resistant BSI varied markedly. This included self-evaluated infection prevention level (WHO-IPCAF score: median 428, range 155 to 687.5) and antibiotic stewardship activities (WHO stewardship toolkit questions: median 14.5, range 2 to 23). These results did not correlate with national income levels. Across all sites, ceftriaxone and ciprofloxacin were the most consistently available antibiotic agents, followed by amoxicillin, co-amoxiclav, gentamicin and co-trimoxazole. There was substantial variation in the availability of some antibiotics, especially carbapenems, amikacin and piperacillin-tazobactam with degree of access linked to national income level. Investigators described out-of-pocket payments for access to additional antibiotics at 7/8 sites. The in-pharmacy availability of antibiotics correlated well with actual use of antibiotics for treating BSI patients. Conclusions: There was wide variation between these African hospitals for a range of important circumstances relating to treatment and control of severe bacterial infections, though these did not all correspond to national income level. For most antibiotics, patient-level use reflected in-hospital drug availability, suggesting external antibiotics supply was infrequent. Antimicrobial resistant bacterial infections could plausibly show different clinical impacts across sub-Saharan Africa due to this contextual variation.

Local meanings and perceptions of women’s empowerment: Qualitative evidence from female and male farmers in rural Ghana

Assessing the relationship between empowerment and nutrition along the agriculture-nutrition pathway is limited by dissimilar emic and etic views of the construct, limited understanding of its contextual variation, and measurement difficulties. This study explored local meanings and perceptions of empowerment among women and men farmers in rural Ghana. The qualitative study took place within the LinkINg Up project, a quasi-experimental, nutrition-sensitive agriculture intervention (ClinicalTrials.gov NCT03869853) in three sub-districts of the Eastern Region. The intervention was implemented through farmer-based organizations (FBO) that were selected using a set of criteria such as female representation and level of member participation. Within the FBO, all women were recruited to participate along with one male adult family member (spouse/partner, older son, father). Non-FBO members (women and their male family member) from the same communities were also enrolled as a comparison group. This manuscript addresses an independent research question on empowerment, not the LinkINg Up intervention outcomes. For the question, participants (53 females and 45 males) were selected purposefully based on FBO membership of the woman (member, non-member). During the first three months of the project, eight focus group discussions (FGD) with women and seven FGD with men were conducted to probe into local understandings of empowerment and women’s empowerment (WE). The FGD were translated to English from the local language and transcripts were coded using a Constructivist Grounded Theory approach (open, axial, selective coding) with MAXQDA 2022. Women and men described empowerment in terms of an individual’s capability to improve circumstances by setting and meeting intentional and measurable goals. The construct of empowerment was made up of internal and external components. Internal components were those that were essential to allow one to be empowered, such as self-confidence, while the external components of empowerment were related to personal and community factors that empowered people, for example, asset ownership and social support. Emic understandings of WE were often related to women’s relationships with others and their roles (reproductive, productive, and community) within the studied context. The local descriptions of an empowered woman were categorized as someone who: i) exhibits qualities that are perceived to help one achieve goals, ii) takes actions to achieve goals, and iii) works with others to achieve own goals or common goals. When assessing WE in the study area, it is important to incorporate measures for women’s goal-setting capacity in relation to farming and business activities, and their ability to implement their goals, while taking into account relational aspects. Key words: Nutrition-sensitive agriculture, Farmers, Empowerment, Emic, Women, Gender, Low-income population, Ghana