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This paper presents an assessment of the factors associated with access to master’s degree programs in Brazil, investigating whether there is evidence of inequity arising from students’ personal and socioeconomic characteristics. A rich and novel dataset comprising microdata on undergraduate college graduates and new master’s students is used for the empirical analysis. Students’ decisions to progress to graduate education are modeled as a two-stage process, and the parameters are estimated separately for each broad academic field using a conditional logit model for the first stage, and a logistic regression analysis for the second stage. The main findings are: (a) there is strong evidence of low mobility of students starting graduate education, and they are far more likely to choose a master’s degree program in the same university or close to where they graduated from college; (b) academic performance and activities during undergraduate program in college are associated with an increase in the relative odds of progressing to graduate education; (c) in most broad academic fields, no evidence that women, black or brown students, economically disadvantaged students, foreigners and people with disabilities are less likely to start a master’s program is found; and (d) a significant association between the odds of enrollment and parental education is not observed in nearly all fields. The study points to different recommendations and to further research questions to understand and improve graduate education in Brazil.

Grain boundary (GB) plasticity dominates the mechanical behaviours of nanocrystalline materials. Under mechanical loading, GB configuration and its local deformation geometry change dynamically with the deformation; the dynamic variation of GB deformability, however, remains largely elusive, especially regarding its relation with the frequently-observed GB-associated deformation twins in nanocrystalline materials. Attention here is focused on the GB dynamics in metallic nanocrystals, by means of well-designed in situ nanomechanical testing integrated with molecular dynamics simulations. GBs with low mobility are found to dynamically adjust their configurations and local deformation geometries via crystallographic twinning, which instantly changes the GB dynamics and enhances the GB mobility. This self-adjust twin-assisted GB dynamics is found common in a wide range of face-centred cubic nanocrystalline metals under different deformation conditions. These findings enrich our understanding of GB-mediated plasticity, especially the dynamic behaviour of GBs, and bear practical implication for developing high performance nanocrystalline materials through interface engineering., Grain boundary can change its structure upon deformation. Here, the authors show that during this process, grain boundary mobility can be tuned dynamically via a self-stimulated twinning process.

We examine variation in a rural variety of Acehnese spoken in Aceh Province, to better understand the impact of long-term contact with Indonesian and increasing urbanization. The Great Aceh variety is characterized by variable realization of word-final (t) as a dental vs. glottal stop. Analyses of over 2,000 tokens of this variable from a corpus of spontaneous speech from 35 speakers indicate that the variability is relatively stable among men, and among women of high mobility, measured in terms of education, occupation, and time spent outside Great Aceh. Women with low mobility produce the lowest rates of [t̪], and in this group we observe a higher rate of [t̪] by younger than older women, suggesting change over time. We thus find both stability – among those who have long enjoyed high levels of mobility – and change – among those most affected by recent social changes, namely low-mobility women.

Knowledge of drivers’ mobility patterns is useful for enabling context-aware intelligent vehicle functionality, such as route suggestions, cabin preconditioning, and power management for electric vehicles. Such patterns are often described in terms of the Points of Interest (PoIs) visited by an individual. However, existing PoI extraction methods are general purpose and typically rely on detecting periods of low mobility, meaning that when they are applied to vehicle data, they often extract a large number of false PoIs (for example, incorrectly extracting PoIs due to stopping in traffic), reducing their usefulness. To reduce the number of false PoIs that are extracted, we propose using features derived from vehicle signals, such as the selected gear and status of doors, to classify candidate PoIs and filter out those that are irrelevant. In this paper, we (i) present Activity-based Vehicle PoI Extraction (AVPE), a wrapper method around existing PoI extraction methods, that utilizes a postclustering classification stage to filter out false PoIs, (ii) evaluate the benefits of AVPE compared to three state-of-the-art general purpose PoI extraction algorithms, and (iii) demonstrate the effectiveness of AVPE when applied to real-world driving data.

Aims and objectives To identify the nurses' perceptions of their role with respect to promoting physical activity in adult patients and factors related to this role perceptions.Background Ageing and chronic diseases are often accompanied by a decrease in physical activity. Nurses are in an excellent position to promote physical activity, because of their close and frequent interactions with patients. However, they often fail to actively stimulate patients to physical activity due to a lack of time, competing priorities and their focus on acute problems. Unclear was how nurses view their professional role in the promotion of physical activity.Design Systematic literature review.Methods PubMed, COCHRANE and CINAHL EBSCO were searched for papers published from 2006 to September 2019. Two reviewers independently assessed the methodological quality, using MMAT criteria. Thematic synthesis was used to analyse the data. The PRISMA statement was followed for reporting.Results Overall, 10 quantitative, eight qualitative and one mixed methods study were included in the review. Analyses of these studies resulted in six themes: (1) active and professional role; (2) the recognised importance; (3) fear of patient falling; (4) patient's present health and need; (5) interdisciplinary context and responsibility; and (6) nurses' knowledge.Conclusions Nurses perceive they have an active role in the promotion of physical activity and consider it as important and part of their professional role. Clear guidance increased education and stronger awareness of guidelines might enable nurses to translate their perceived role into daily practice. This will enhance professional fulfilment as well as patients' physical activity.Relevance to clinical practice The findings guide the development of interventions that aim to improve nursing care with respect to the promotion of physical activity and help managers and educators to provide appropriate resources and education.

The adoption of Electric Vehicles (EV) is one of the solutions to reduce emission problems. In Indonesia, the government targets 2.1 million Electric Motorcycles (EM) ownership in 2025. One of the keys to encouraging the EV Indonesian market is vehicle cost analysis, like Total Cost of Ownership (TCO). This study developed a TCO model to compare EM with Conventional Motorcycles (CM) in Indonesia. Data were collected from surveys and information from stakeholders. The proposed TCO model considered a battery replacement cost, which influenced the resale value of the vehicle. As a result, the TCO of EM had a more economical value than CM of 12% (IDR 3 million) on low mobility, 16% (IDR 4 million) on medium mobility, and 18% (IDR 5.5 million) on high mobility. In addition, several scenarios were also analyzed as a study to consider providing subsidies ownership motorcycles in Indonesia.

Fe is a common substituent in palygorskites (Plg), but its effect on the microscopic properties is unclear. In the current study, molecular dynamics (MD) simulations were carried out to investigate the effect of Fe on the properties of the nano-pores in Plg. The structures and dynamics of water and Na+ ions in the pores were computed by analyzing the MD trajectories. The results revealed that for both Fe-containing and ordinary Plg, zeolitic water molecules can diffuse into the pores with very low mobility whereas Mg-coordinated water fails to escape. Na+ ions show no obvious diffusivity because they are fixed above the Si–Osix-membered rings. Detailed comparison indicates that Fe-substitution has no significant influence on the pore properties of Plg.

Russian companies have actively used the transfer of support functions to outsourcing in recent decades, which allows them to increase the efficiency of their activities and focus on the main business areas. For this purpose, shared service centers are created, which can take various forms – from an internal division to a branch or subsidiary of the company. When deciding to outsource functions, one of the key issues is the choice of the shared service centers’ locations. The purpose of the study was to review the existing approaches to determining the factors that influence the choice of the shared service centers' location, as well as to assess the degree of influence of such factors based on statistical data. Using the method of ordinal logistic regression, a direct statistically significant dependence was revealed between the rating of the socio-economic situation of the region, the number and rating of universities, and the number of shared service centers in the region. The inverse dependence between the unemployment rate in the region and the number of shared service centers is also established, as well as the absence of the influence of the average wage level on the territorial location of shared service centers. The study shows that one of the significant factors influencing the choice of the shared service center location in Russia is the proximity to the main production. This is due to the need to preserve jobs in single-industry towns, the low mobility of the population, and the insufficient level of remote service technologies. The article outlines the directions of development that allow strengthening the role of regions in the creation of shared service centers in the future. The results of the study can be used by companies when analyzing the activities of existing or creating new shared service centers, as well as by authorities when considering regional development issues.

Background To improve older patients' physical activity (PA) behavior, it is important to identify facilitators and barriers to enhancing PA in older patients (>= 65 years) during hospitalization from the perspectives of patients, caregivers, and healthcare professionals (HCPs). Methods In this systematic review, a search of PubMed, CINAHL, PsycINFO, EMBASE, and Web of Science (January 2000-May 2021) was performed, and quantitative, qualitative, and mixed-methods studies were included. The methodological quality of included studies was assessed using the Mixed Methods Appraisal Tool. Identified facilitators and barriers were categorized using the social ecological model at the intrapersonal, interpersonal, and institutional levels. Results The 48 included articles identified 230 facilitators and 342 barriers. The main facilitators at the intrapersonal level included: knowledge, awareness, and attitudes; interpersonal level: social support, including encouragement and interdisciplinary collaboration; and institutional level: stimulating physical environment, patient activities and schedules, and PA protocols. The main barriers at the intrapersonal level included: physical health status, having lines or drains, patients' fear, and HCPs' safety concerns; interpersonal level: patient-HCP relation and HCPs' unclear roles; and institutional level: lack of space and resources, including time and equipment. Best evidence synthesis provided moderate level of evidence for three barriers: patients' unwillingness or refusal to move, patients having symptoms, and patients having lines or drains. No moderate level of evidence was found for facilitators. Conclusion The PA behavior of older adults during hospitalization is multidimensional. Our overview highlights facilitators and barriers on multilevel scale (intrapersonal, interpersonal, and institutional levels) that guides patients, caregivers, HCPs, and researchers in future clinical practice, and intervention development and implementation.

Using detailed administrative microdata for two countries, we build a modeling framework that yields new explanations for the origin of firm sizes, the firm contributions to unemployment, and the job-to-job mobility of workers between firms. Firms are organized as nodes in networks where connections represent low mobility barriers for workers. These labor flow networks are determined empirically, and serve as the substrate in which workers transition between jobs. We show that highly skewed firm size distributions are predicted from the connectivity of firms. Further, our model permits the reconceptualization of unemployment as a local network phenomenon related to both a notion of firm-specific unemployment and the network vicinity of each firm. We find that firm-specific unemployment has a highly skewed distribution. In coupling the study of job mobility and firm dynamics the model provides a new analytical tool for industrial organization and makes it possible to synthesize more targeted policies managing job mobility.

Recently, low-mobility individuals have drawn growing attention in the traffic organisation field. Therefore, following the previous research efforts, this study tries to design and optimise a multimodal traffic strategy for low-mobility individuals. First, the preliminary application conditions and implementation effects of different traffic strategies are analysed to determine feasible multimodal traffic strategies for low-mobility individuals based on the optimisation goal and strategic orientation. Then, an optimisation model is proposed to select the optimal strategies from feasible strategies for different travel modes, aiming to minimise the weighted sum of public transport, walking, non-vehicle-based transportation, travelling by private car and strategy implementation costs. An appropriate heuristic algorithm is developed to solve the optimisation model. Finally, the case study of Wenling is presented to verify the feasibility and practicality of the proposed multimodal traffic strategy design and optimisation for low-mobility individuals. The results show that the proposed multimodal traffic strategy has stronger positive than negative effects from the travel cost aspect. The findings presented in this work can provide a reference for other, more in-depth, studies on the multimodal traffic travel of low-mobility individuals in the future.

O medo em cair é definido como uma preocupação exacerbada em cair na realização das atividades cotidianas. O conhecimento dos fatores associados ao medo de cair pode contribuir na elaboração de estratégias multidimensionais que visem reduzir futuras quedas nos idosos. Objetivo: Verificar a associação dos aspectos físicos-funcionais, comportamentais e de saúde com o medo de cair em idosos comunitários. Método: Tratou-se de um estudo transversal, com amostra aleatória probabilística, incluindo 308 idosos comunitários de ambos os sexos. A variável desfecho foi o medo em cair e as variáveis preditoras foram os aspectos comportamentais avaliados pelo autorrelato (histórico de quedas e autopercepção em saúde) e aspecto em saúde (sintomas depressivos). Já os aspectos físicos-funcionais incluíram a sarcopenia provável e a mobilidade. Resultados: Maiores chances de apresentar medo em cair foram observados em idosos que tiveram histórico de quedas (OR: 1,87; IC95%: 1,10; 3,19), autopercepção negativa de saúde (OR: 3,35; IC95%: 1,87; 6,00), sintomas depressivos (OR: 3,24; IC95%: 1,88; 5,57), sarcopenia (OR: 4,22; IC95%: 2,51; 7,09) e baixa mobilidade (OR: 4,19; IC95%: 2,19; 7,99) quando comparados aos que não tinham as mesmas condições. Conclusão: Histórico de quedas, autopercepção ruim de saúde, sintomas depressivos, sarcopenia e baixa mobilidade foram associados ao medo de cair em idosos comunitários.

In this paper, we carry out an isotopic study to learn about the diet and mobility patterns of the human groups that inhabited different areas and environments of western Catamarca, Argentina, over almost 2500 years. We present and discuss the results of the isotopic composition of 26 bioarchaeological remains (δ13C and δ15N on bone collagen, and δ13C and δ18O on bone apatite) with their respective calibrated absolute dates, from different settings and elevations of the province of Catamarca. They account for the sociocultural development of both the first agropastoral village societies and the Inca society. We also present the regional isotopic context of autochthonous animal and plant food resources. The isotopic composition (δ13C and δ15N on bone collagen) of 47 samples of pre-Hispanic camelids recovered from archaeological sites located at different altitudes of the Fiambala and Chaschuil regions are studied and discussed. In addition, the δ13C values of 52 native modern and archaeological plant samples are compiled, including samples from the region as well as information from the bibliography. Finally, isotopic analyses of water samples (δ18O) recovered from different environments in the study region are also shown. The data from δ13C and δ15N on bone collagen and δ13C on bone apatite show a high variability of the human diet of the populations of western Catamarca, and suggest that the societies that inhabited the region during the first millennium AD had a balanced diet that combined proteins and carbohydrates, while those dated after the thirteenth century AD reduced their protein intake, which would have significantly affected their health status. The first trends in the δ18O values indicate that individuals had low mobility patterns during their lives, except for some unusual cases of possible non-local individuals.

This study aimed to explore the potential feasibility of magnetite powder as an erosion tracer for national-scale soil erosion monitoring in China. This study evaluated the effectiveness of silt-sized magnetite powder, a magnetic erosion tracer, in four representative erodible soils in China with distinct textures (from sandy loam to silty clay). The χlf values of different magnetic tracer-tagged aggregate size ranges (> 0.05 mm) were similar based on dry aggregate analysis. Simulated long-term leaching tests showed that the tracer had low mobility in soil profiles. The simultaneous separation of the tracer and tested soils under surface flow scouring conditions indicates that the tracer exhibited good bonding ability with different soils. These findings indicate that magnetite powder is suitable for erosion monitoring in China. This method may be extended to other regions over the world.

The composition of manganese micronodules from miopelagic clays and Ethmodiscus oozes of the central part of the Brazil Basin (station 1537, R/V Akademik Sergei Vavilov) is considered. Micronodules were recovered from >50 μm fraction of sediments from the depth intervals of 300 to 305, 405 to 410 and 442 to 452 cm below seafloor. The composition of micronodules was determined in separate size fractions of 50–100, 100–250 and 250–500 μm after dissolution in 0.5N NH2OH × HCl + 25% CH3COOH. The contents of Co, Ni, Cu, Ce, Pb, W, Th, and Bi in micronodules of miopеlagic clays were found to be higher than in micronodules from Ethmodiscus oozes. In the latter, the positive anomalies of Li, As, Mo, Cd, Tl, and U were revealed. The REE composition of micronodules in miopelagic clays is similar to the composition of hydrogenous crusts with a maximum in middle REE and a positive cerium anomaly. Micronodules of Ethmodiscus oozes have a positive Ce anomaly 2.8–3.8 and a deficiency of light lanthanides, similar to the composition of dissolved REEs in pore and bottom ocean waters. High accumulation of redox-sensitive elements in micronodules (As, Mo, V, and Cd) indicates an anaerobic stage in the post-sedimentary period in Ethmodiscus ooze caused by high biological productivity of waters. The formation of micronodules began during the period when the reducing conditions changed to oxidizing ones. Elements with low mobility (As, Mo, V, and Cd) accumulated in sediments and pore water during the anaerobic stage were then sorbed on Mn oxyhydroxides during the oxidation stage.

Background To improve older patients’ physical activity (PA) behavior, it is important to identify facilitators and barriers to enhancing PA in older patients (≥ 65 years) during hospitalization from the perspectives of patients, caregivers, and healthcare professionals (HCPs). Methods In this systematic review, a search of PubMed, CINAHL, PsycINFO, EMBASE, and Web of Science (January 2000–May 2021) was performed, and quantitative, qualitative, and mixed-methods studies were included. The methodological quality of included studies was assessed using the Mixed Methods Appraisal Tool. Identified facilitators and barriers were categorized using the social ecological model at the intrapersonal, interpersonal, and institutional levels. Results The 48 included articles identified 230 facilitators and 342 barriers. The main facilitators at the intrapersonal level included: knowledge, awareness, and attitudes; interpersonal level: social support, including encouragement and interdisciplinary collaboration; and institutional level: stimulating physical environment, patient activities and schedules, and PA protocols. The main barriers at the intrapersonal level included: physical health status, having lines or drains, patients’ fear, and HCPs’ safety concerns; interpersonal level: patient-HCP relation and HCPs’ unclear roles; and institutional level: lack of space and resources, including time and equipment. Best evidence synthesis provided moderate level of evidence for three barriers: patients’ unwillingness or refusal to move, patients having symptoms, and patients having lines or drains. No moderate level of evidence was found for facilitators. Conclusion The PA behavior of older adults during hospitalization is multidimensional. Our overview highlights facilitators and barriers on multilevel scale (intrapersonal, interpersonal, and institutional levels) that guides patients, caregivers, HCPs, and researchers in future clinical practice, and intervention development and implementation.

Background Older adults admitted with an acute medical illness spent little time active during hospitalisation and this has been associated with negative health outcomes. Understanding which barriers and enablers influence the physical activity behaviour of hospitalised older adults is a first step towards identifying potentially modifiable factors and developing, evaluating and implementing targeted interventions aimed at increasing their physical activity behaviour. Using a theoretical framework has been found to be more successful in changing behaviour than using a non-theory driven approach. This study aimed to explore barriers and enablers to physical activity behaviour in older adults admitted to a hospital with an acute medical illness, as perceived by patients and healthcare professionals, and to categorise them using the Theoretical Domains Framework (TDF). Methods A qualitative study was conducted at a combined university and regional hospital in the Netherlands between January 2019 and February 2020. Older adults (≥70 years) admitted with an acute medical illness, and healthcare professionals (nurses, physicians, physiotherapists) were recruited using purposive sampling. Semi-structured interviews were audiotaped, transcribed and analysed using directed qualitative content analysis. Barriers and enablers to physical activity behaviour during hospitalisation were identified and coded using the TDF. Results Meaning saturation was determined after interviews with 12 patients and 16 healthcare professionals. A large number of barriers and enablers were identified and each categorised to 11 of the 14 domains of the TDF. The ‘Environmental Context and Resources’ domain in particular yielded many examples, and revealed that the hospital environment exerts an inactivating influence on patients. Conclusions The large number of identified barriers and enablers highlights the complexity of influencing older adults’ physical activity behaviour during hospitalisation. This overview of barriers and enablers to physical activity behaviour in older adults admitted to a hospital with an acute medical illness represents an initial step towards developing, evaluating and implementing theory-informed behaviour change interventions to improve hospitalised older adults’ physical activity levels. It can assist clinicians and researchers in selecting modifiable factors that can be targeted in future interventions.

BackgroundInactive behaviour is common in older adults during hospitalisation and associated with poor health outcomes. If patients at high risk of spending little time standing/walking could be identified early after admission, they could be given interventions aimed at increasing their time spent standing/walking. This study aims to identify older adults at high risk of low physical activity (PA) levels during hospitalisation.MethodsProspective cohort study of 165 older adults (≥ 70 years) admitted to the department of Internal Medicine of Maastricht University Medical Centre for acute medical illness. Two prediction models were developed to predict the probability of low PA levels during hospitalisation. Time spent standing/walking per day was measured with an accelerometer until discharge (≤ 12 days). The average time standing/walking per day between inclusion and discharge was dichotomized into low/high PA levels by dividing the cohort at the median (50.0%) in model 1, and lowest tertile (33.3%) in model 2. Potential predictors—Short Physical Performance Battery (SPPB), Activity Measure for Post-Acute Care (AM-PAC), age, sex, walking aid use, and disabilities in activities of daily living—were selected based on literature and analysed using logistic regression analysis. Models were internally validated using bootstrapping. Model performance was quantified using measures of discrimination (area under the receiver operating characteristic curve (AUC)) and calibration (Hosmer and Lemeshow (H–L) goodness-of-fit test and calibration plots).ResultsModel 1 predicts a probability of spending ≤ 64.4 min standing/walking and holds the predictors SPPB, AM-PAC and sex. Model 2 predicts a probability of spending ≤ 47.2 min standing/walking and holds the predictors SPPB, AM-PAC, age and walking aid use. AUCs of models 1 and 2 were .80 (95% confidence interval (CI) = .73—.87) and .86 (95%CI = .79—.92), respectively, indicating good discriminative ability. Both models demonstrate near perfect calibration of the predicted probabilities and good overall performance, with model 2 performing slightly better.ConclusionsThe developed and internally validated prediction models may enable clinicians to identify older adults at high risk of low PA levels during hospitalisation. External validation and determining the clinical impact are needed before applying the models in clinical practise.

In our modern, fast-paced life, plastic is a versatile material essential to our economy, daily life is unthinkable without it. However, there are serious downsides for the environment and health, which are becoming more and more stark in our society, and the recycling of plastic offers a partial solution to these widespread problems. The present work delves into the environmental assessment of fibre-reinforced concrete specimens, made with recycled plastic fibres from food packaging waste. Leaching tank tests for the evaluation of the long-term release of pollutant elements, identification of leaching mechanisms, and the diffusion process of contaminants into the environment were conducted on fibre reinforced concrete. The results showed that the incorporation of the recycled plastic fibres, classified as non-hazardous, did not release relevant levels of any potential harmful element incorporated in concrete. Moreover, low mobility was detected in the studied elements and different release mechanisms were identified through long-term diffusion leaching tests. Hence, the environmental feasibility of the incorporation of recycled plastic fibre in concrete was proven. This study strengthens the objectives set out by the Circular Economy Action Plan, which includes the European Strategy for Plastics and aims to, among other things, boost the market for recycled plastics.

Optimal uptake of micronutrients (B, Cu, Fe, Mn, and Zn) and managing the potentially toxic elements (PTEs) (Co, Cr, Ni, Pb, and Sr) in the ranges not detrimental to plant function may be linked to improving plants’ healthy growth and the ability to provide ecosystem services. We investigated concentrations, mobility, and potential availability of potentially toxic elements (PTEs) in soil samples from polluted and non-polluted municipal parks in Reading (UK) and Belgrade (Serbia) and their impact on elemental concentrations in Tilia leaves. We aimed to identify common limiting factors potentially affecting the growth/healthy function of this widely-used tree species. Levels of all elements in soil were below limits established by the directive of European Communities, except for Ni at Belgrade sites. Content of Co, Cr, Cu, Fe, Ni, Pb, and Zn in soluble fraction at all locations was &lt, 10%, indicating low mobility, B showed moderate mobility (11.1–20.7%), Mn (6.5–55.6%), and Sr—high (44–76.3%). Principal Component Analysis of Tilia leaf tissues showed a different capacity for uptake/accumulation of PTEs in different locations. Findings indicate the complexity of local edaphic influences on plants’ elemental uptake and the risk of those leading to deficiency of important micronutrients, which may impede trees’ function and thus the ability to optimally provide ecosystem services.

Knowledge of dynamic parameters of mechanical systems is required in different applications, particularly in the simulation and control problems. In this paper, the standard identification methods are discussed and a new methodology for identification of inertial parameters is raised when the closed chain has low mobility. The methodology includes formulating a symbolic model based on the transfer of inertial properties and a reduction using dynamic contribution indices based on CAD approximations. The new method is applied to the front suspension of an electrical vehicle. After applying the procedure, a model with few parameters that allows accurately reproducing the dynamic behaviour of the system is obtained. A novel methodology has been developed that allows the identification of dynamic parameters in low mobility mechanical systems.

The paper presents a clinical case of a rare stromal colon tumor in a patient previously operated for breast cancer. The patient with a rapidly growing abdominal tumor of unknown origin underwent tests in the department of coloproctology. According to ultrasound and CT examina-tion, the lumpy formation with large size and low mobility, compressing the surrounding organs and probably coming from the colon, has been revealed. The removal of the tumor coming from the sigmoid colon with segmental resection anastomosis was performed. The postoperative period was uncomplicated, patient discharged from the clinic 7 days after surgery. Immunohistochemical examination of the tumor showed Gastrointestinal Autonomous Neurogenic Tumor (GANT) – a variant of GIST. Surgery for rare mesenchymal tumors is better in the coloproctologi-cal units with sufficient skills of surgeons. The multidisciplinary approach is necessary in such cases.

The object of research is the human capital of the agricultural sector of the national economy. The study of scientific works has revealed that in defining the essence of human capital as an economic category, scientists have not reached a common opinion. With all the variety of theoretical approaches, the problem of the peculiarities of human capital formation in the agricultural sector remains insufficiently studied. There are significant differences in methodological approaches to the interpretation of its essence at different levels of manifestation and certainty. The methods of systematic approach and structural-functional analysis, abstract-logical, monographic and graphical methods were used in the research. The study identifies the nature and peculiarities of human capital formation in the agrarian sector of the economy and clarifies the human capital functions of the agrarian sector and the factors that contribute to its development. In the work on the basis of generalization of theoretical researches on the role of human capital in the economy, its state and prospects of development in the agrarian sector of economy are analyzed. The factors that influence the level of formation and development of human capital are analyzed. The functions of human capital are described and ways to improve the available human capital in rural areas are proposed. The peculiarities of the human capital of the agrarian sector of the economy are revealed, the main of which are: –close connection of the human capital of the agrarian sector with the rural way of life, agrarian work and life; –significant social and professional homogeneity; –great dependence of its use on natural rhythms and cycles; –significant territorial dispersion of the human capital of the agricultural sector, its relatively low mobility compared to human capital in other sectors of the national economy; –need for development and development under conditions of disability due to the lower standard and quality of life in rural areas, etc.

The engineered nanoparticles (ENPs) with high reactivity are promising materials for in-situ groundwater remediation, however, their low mobility in natural porous media greatly limits their applic...

In this article the main types of public transport were overviewed, including buses and trolleybuses. But there is no optimal kind of transport: buses are mobile, but they generate huge amounts of gas emissions into the environment and run on expensive fuel, and trolleybuses are cheaper to operate due to cheap electricity, but because of their attachment to transmission lines, they have extremely low mobility and in the event of malfunctions on the trolleybuses themselves, accidents with contact lines or congestion, they will not be able to overcome the area where it occurred. A trade-off between using buses and regular trolleybuses operating solely from the mains is to use a high-voltage battery trolley. The article presents the advantages and disadvantages of the above-mentioned types of public transport, shows the structural diagrams of power systems conventional trolleybus and trolley with high-voltage battery, the so-called combined power system. The advantages of the combined power supply system compared to the usual ones are given. The principle of operation of the mechanism of extraction of energy from the network and from one of the key elements of the combined system - the capacitive drive is explained. Power loss estimation using the combined system is performed and afterwards it showed that losses of the ordinary power supply system are twice higher than losses of combined power supply system. The impact of traffic jams and accidents on the profit of the trolleybus route and on the profits of the passengers it transports is shown and it appeared that the more traffic jams and line voltage interruptions are the more economic losses trolleybus route will have and the less salary it’s passengers will get. The study of bus and trolleybus routes of the city of Kyiv was conducted and the corresponding map of these routes was made. The total length of the trolleybus and bus routes is estimated and the map shows the length of the common sections of the routes and the non-coincident sections. The capacity of the high-voltage battery required to cover the trolleybus with the autonomous running of part of the routes where the buses run was calculated. In addition, the total battery capacity was calculated. Considering the cost of the specific power consumption of the battery, i.e. the price of 1 kW of its energy, its cost was estimated. At the end of the article, the overall economic effect of using a trolleybus system is calculated. The common economic effect for all trolleybus passengers was calculated.

The nucleolus is a prominent nuclear condensate that plays a central role in ribosome biogenesis by facilitating the transcription and processing of nascent ribosomal RNA (rRNA). A number of studies have highlighted the active viscoelastic nature of the nucleolus, whose material properties and phase behavior are a consequence of underlying molecular interactions. However, the ways in which the material properties of the nucleolus impact its function in rRNA biogenesis are not understood. Here we utilize the Cry2olig optogenetic system to modulate the viscoelastic properties of the nucleolus. We show that above a threshold concentration of Cry2olig protein, the nucleolus can be gelled into a tightly linked, low mobility meshwork. Gelled nucleoli no longer coalesce and relax into spheres but nonetheless permit continued internal molecular mobility of small proteins. These changes in nucleolar material properties manifest in specific alterations in rRNA processing steps, including a buildup of larger rRNA precursors and a depletion of smaller rRNA precursors. We propose that the flux of processed rRNA may be actively tuned by the cell through modulating nucleolar material properties, which suggests the potential of materials-based approaches for therapeutic intervention in ribosomopathies., SCOPUS: ar.j, info:eu-repo/semantics/published

The decision on the possible trails to be taken by an information that is to be transmitted from a data point to its destined point enact to have more significance on the performance measure of the transmission. The mobile wireless network is also one such network whose quality of service are determined from the ways the trails are entrenched. This wireless adhoc network that is independent of the previously existing structure forms a topology that undergoes spontaneous changes with the closely existing data points or devices. This type of networks are well suited for many adverse situation and environment, but certain attributes of the wireless adhoc such as insubstantial bandwidth, more over head in paths , hidden data point problem, energy restraints, motility interfered routing make them visage difficulties in having a proper routing, empowering MANET to achieve lesser quality in the service provided. So this paper quality of service analysis for the MANET using high power low mobility protocol ensures a routing path entrenchment between highly energetic with diminished motility data points to improvise the quality of service. The QoS analysis is done based on the delay, throughput and the packet delivery ratio to measure its performance.

The accumulation of inorganic contaminants in drinking water distribution systems (DWDS) can greatly threaten water quality and safety. This work mainly focused on the accumulation, speciation and risk assessment of inorganic contaminants found in pipe scales and loose deposits in DWDS. Global contamination factor (GCF), risk assessment code (RAC) and consensus-based sediment quality guidelines (CBSQGs) were adopted for the potential health risk assessment of inorganic contaminants. The Tessier sequential extraction method was used to study the speciation distribution of inorganic contaminants in fourteen samples (six pipe scale samples, eight loose deposit samples) collected from real DWDS. The significant correlation between Al and Mn showed there was a co-occurrence behavior of Al and Mn in pipe scales and loose deposits. In addition to the possible interactions between Al and Mn, Ba, Cu and As were possibly accumulated during the formation of Al and Mn commixtures. Mn, Cu, Pb, Zn, Ni, Co and Ba in the samples were mainly associated with the Fe-Mn oxides fraction, which indicated Fe-Mn oxides might play an important role in the accumulation and release of these inorganic contaminants. Fe, Al, As, Cr, V and Cd mainly existed in the residual fraction, which indicated their low mobility. The GCF results demonstrated that most of the sample sites had a certain environmental risk. The RAC results showed that high risk mainly resulted from Cd both in pipe scales and loose deposits. According to the CBSQGs evaluation, heavy metals in loose deposits were more harmful, and Ba exhibited the highest risk among all heavy metals.

Significance From intracellular freezing to cloud formation, the crystallization of water is ubiquitous and shapes life as we know it. A full comprehension of the ice nucleation process at the molecular scale remains elusive and we cannot predict where nucleation will occur. Using computational techniques we show that homogeneous nucleation in supercooled water happens in immobile liquid regions that emerge from heterogeneous dynamics. With this we link the topics of nucleation and dynamical heterogeneity and open ways to understand and control heterogeneous nucleation in solution, in confinement, or at interfaces via understanding their effects on liquid dynamics., When an ice crystal is born from liquid water, two key changes occur: (i) The molecules order and (ii) the mobility of the molecules drops as they adopt their lattice positions. Most research on ice nucleation (and crystallization in general) has focused on understanding the former with less attention paid to the latter. However, supercooled water exhibits fascinating and complex dynamical behavior, most notably dynamical heterogeneity (DH), a phenomenon where spatially separated domains of relatively mobile and immobile particles coexist. Strikingly, the microscopic connection between the DH of water and the nucleation of ice has yet to be unraveled directly at the molecular level. Here we tackle this issue via computer simulations which reveal that (i) ice nucleation occurs in low-mobility regions of the liquid, (ii) there is a dynamical incubation period in which the mobility of the molecules drops before any ice-like ordering, and (iii) ice-like clusters cause arrested dynamics in surrounding water molecules. With this we establish a clear connection between dynamics and nucleation. We anticipate that our findings will pave the way for the examination of the role of dynamical heterogeneities in heterogeneous and solution-based nucleation.

Foliar fertilization is becoming very popular since it is highly efficient, minimizes contamination, and is target oriented. However, the low mobility of several nutrients and low penetration through the leaf cuticle should be addressed, to establish an efficient leaf applied fertilizer. During the last few years, nanotechnologies – such as nanocarriers - have been studied with regard to improving the penetration and delivery of compounds. This work describes the use of membrane vesicles obtained from Brassica oleracea L. as nanobiocarriers of Zn and the evaluation of their potential as a foliar fertilizer, also in Brassica. The results show a high Zn encapsulation efficiency and high delivery into protoplasts. Also, the foliar fertilization experiments demonstrated a very effective system of Zn nanofertilization.

Recent events relating to the Covid-19 Pandemic have increased the interest in modelling the spread of disease. This paper describes an approach to modelling the spread of a disease across Ireland using a hybrid compartmental and diffusion model built around small areas defined by the Central Statistics Office and Northern Ireland Statistics and Research Agency normally used to process National Census data. Voronoi diagrams are used to simplify the small region descriptions to polygons that provide a single linear boundary between each region. The progress of the disease within each region and between neighbouring regions was modelled using a hybrid SEIRD (Susceptible, Exposed, Infectious, Recovery, Death) and diffusion technique. The paper describes how the model can be fitted to data available for the current Covid-19 pandemic to simulate cases over periods of lockdown where individual mobility is low. The approach used also has potential application to model Ash die-back and the spread of invasive species.

This study proposes a novel DTX detection approach for narrow-band internet-of-things technology (NB-IoT) narrow-band physical uplink shared channel (NPUSCH) Format 1. To improve the success rate performance of this channel, it is possible to configure up to 128 repetitive transmissions. The legacy scheme simultaneously uses all these repetitions of channel estimation for DTX detection. In the proposed method, DTX detection is performed by using the average of channel estimation results at certain intervals in high repeated transmissions. Our extensive simulations show that the proposed method improves success rate especially for low Doppler frequency conditions (low mobility scenarios). In addition, the computational complexity of the proposed method seems lower than the legacy version. Thereupon, we suggest that our scheme is a promising solution for real-time networks.

Low mobility during hospitalisation poses risks of functional decline and other poor outcomes for older adults. Given the pervasiveness of this problem, low mobility during hospitalisation was first described as ‘dangerous’ in 1947 and later described as an epidemic. Hospitals have made considerable progress over the last half-century and the last two decades in particular, however, the COVID-19 pandemic presents serious new challenges that threaten to undermine recent efforts and progress towards a culture of mobility. In this special article, we address the question of how to confront an epidemic of immobility within a pandemic. We identify four specific problems for creating and advancing a culture of mobility posed by COVID-19: social distancing and policies restricting patient movement, personnel constraints, personal protective equipment shortages and increased patient hesitancy to ambulate. We also propose four specific solutions to address these problems. These approaches will help support a culture of healthy mobility during and after hospitalisation and help patients to keep moving during the pandemic and beyond.

Agricultural soils derived from black shale are typically enriched in potentially toxic metals. This is a serious problem, both in terms of the ecological environment and human health. To assess the levels of potentially toxic metals, 90 paired soil-crops samples were collected from the Anji Country, western Zhejiang province, a typical exposed black shale area in China. Concentrations and bioavailability of potentially toxic metals in the soil-crops system were measured, and the associated potential risks were further evaluated. Results showed the enrichment of potentially toxic metals (i.e. Cd, Pb, Cu, Zn and Ni) in the soil and crop samples, especially a significant accumulation of Cd. Sequential extraction data indicated that Cd in soils derived from black shale was the second most dominant element in the exchangeable fraction (mean at 33.42%) and possessed high bioavailability, whereas Pb was mostly retained in the residual fraction (mean at 76.34%) and exhibited low mobility. The total concentration as well as mobility and bioavailability of Cd were the highest in the sampled soils. This resulted in a high potential ecological risk in areas with agricultural soils derived from black shale, which could eventually jeopardize the health of local residents through various exposure pathways. Overall, our findings provide a scientific basis for developing suitable management strategies to mitigate the exposure to potentially toxic metals in high risk areas.

Despite the rising popularity of ride-hailing, planning practitioners are still learning about the use and management of the service. This paper seeks to uncover who the primary users of ride-hailing are through a cluster analysis using traveller behaviour and mobility tool variables, where four traveller types are identified -- Multi-Modal Super-Sharers, Auto + Private Mobility Travellers, Car-Dependent Travellers, and Low Mobility Travellers. This paper finds that current auto-oriented travellers are not using ride-hailing, as demonstrated by Mobility Travellers and Car-Dependent Travellers. Additionally, ride-hailing is primarily used by non-auto-oriented travellers. The largest proportion of regular ride-hailing users, Multi-Modals Super-Sharers, are the youngest, are more educated, have access to the largest variety of mobility tools, and travel the most. For Low Mobility Travellers, the most vulnerable group based on household income, educational attainment, employment status, and car ownership, ride-hailing is filling a transportation gap. Understanding who uses ride-hailing is a key component in understanding the potential changes in travel behaviour.

Concentrations of potentially toxic elements (PTEs) (Al, As, Cd, Cr, Cu, Ni, Pb, and Zn) were measured in topsoil samples collected from parks in the cities of Salzburg (Austria), Thessaloniki (Greece), and Belgrade (Serbia) in order to assess the distribution of PTEs in the urban environment, discriminate natural (lithogenic) and anthropogenic contributions, identify possible sources of pollution, and compare levels of pollution between the cities. An assessment of the health risks caused by exposure to PTEs through different pathways was also conducted. The study revealed that, with the exception of Pb in Salzburg, levels of PTEs in the soils in polluted urban parks were higher than in unpolluted ones, but still lower than those recorded in other European soils. Results of sequential analyses showed that Al, Cr, and Ni were found in residual phases, proving their predominantly lithogenic origin and their low mobility. In contrast, the influence of anthropogenic factors on Cu, Pb, and Zn was evident. Site-dependent variations showed that the highest concentrations of As, Cu, Pb, and Zn of anthropogenic origin were recorded in Salzburg, while the highest levels of Al, Cr, and Ni of lithogenic origin were recorded in Belgrade and Thessaloniki, which reflects the specificity of the geological substrates. Results obtained for the health risk assessment showed that no human health risk was found for either children or adults. This study was conducted as part of a bilateral academic exchange between the University of Thessaloniki and the Universities of Salzburg and Belgrade.

In this paper we report the results from three field measurements and analysis of fifth generation (5G) broadcast systems, conducted in Vienna, Austria. One measurement was conducted under stationary conditions while during the others the receiver was in motion. Based on comparison between computer simulations and the static measurement scenario, we estimate the coverage probability in terms of BLock-Error Ratio (BLER) for various system parametrizations. The results are applicable for more complicated channel conditions for which the measurement procedure is more involved.

Appropriate use of inpatient physical therapy services is important for preventing hospital-associated disability (HAD). We assessed potential overutilization of physical therapy consults on hospital medicine services using the Activity Measure-Post Acute Care (AM-PAC) score. Our sample included 3592 unique admissions (mean age, 66 years; 48% women) at a large academic medical center. Based on an AM-PAC cutoff of >43.63 (raw score, 18) in patients who were discharged to home, 38% of physical therapy consults were considered "potential overutilization." Combined with age

This paper presents a new architecture that integrates Internet of Things (IoT) devices, service robots, and users in a smart assistive environment. A new intuitive and multimodal interaction system supporting people with disabilities and bedbound patients is presented. This interaction system allows the user to control service robots and devices inside the room in five different ways: touch control, eye control, gesture control, voice control, and augmented reality control. The interaction system is comprised of an assistive robotic arm holding a tablet PC. The robotic arm can place the tablet PC in front of the user. A demonstration of the developed technology, a prototype of a smart room equipped with home automation devices, and the robotic assistive arm are presented. The results obtained from the use of the various interfaces and technologies are presented in the article. The results include user preference with regard to eye-base control (performing clicks, and using winks or gaze) and the use of mobile phones over augmented reality glasses, among others.

Organic thin‐film transistors (OTFTs) are identified to be the most promising candidate for next‐generation wearable and implantable electronics because of their unique advantages including their flexibility, low cost, long‐term biocompatibility, and simple packaging. However, commercialization of organic transistors remains an enormous challenge due to their low mobility and lack of scalable strategy for high‐precise soft devices. Here, a novel photolithography fabrication strategy is proposed, which is completely compatible with various commercial organic semiconductor materials, for the first demonstration of the fully photolithographic top‐contact conformable OTFTs with the device density as high as 1523 transistors cm−2. Excellent electrical and mechanical properties with device yield as high as 100%, field‐effect mobility up to 1–2 cm2 V−1 s−1, and outstanding conformability are shown. This work provides a new strategy that can fully maximize the advantages of organic materials and photolithography technology, showing a great prospect in the development of high‐performance, high‐precise organic devices toward the commercialized and industrialized soft electronic products., A novel photolithography strategy that is completely “compatible with” various commercial organic semiconductor materials is proposed for the first demonstration of the fully photolithographic top‐contact organic thin‐film transistors (OTFTs). This strategy offers a general and facile route to incorporate photolithography technology into organic electronics, and presents potential for developing skin‐like soft electronic devices with high device density and high performance.