bluuebunny/crossref_metadata_2025 huggingface dataset:
Changing times for digitalization: The multiple roles of temporal shifts in enabling organizational change
Authors: Söderlund Jonas , Pemsel Sofia
Published: January 2021

Shifting an organization’s temporal order can be a key mechanism for accomplishing organizational change, but it is also fundamentally problematic: instead of helping an organization accomplish change, it may simply reinforce an already failing course of action. Our current understanding of the roles that temporal shifts play in enabling organizational change is inconclusive in terms of when and how temporal shifts contribute to the success of organizational change. We exploit an in-depth case study of a new digitalized design approach implemented at Advanced Construction to demonstrate how a temporal shift can increase temporal awareness, among organizational members, of the salient and differing temporalities involved. In this case, the increased temporal awareness facilitated improved temporal coordination, which in turn figured prominently in making actual change possible. Our study identifies three complementary roles of change-inducing temporal shifts—namely, in connection with past experience, current activities, and future directions. Thus, we develop a deeper understanding of the relation between temporal shifts and organizational change, and offer a novel account of how the establishment of a temporal zone harbors those three roles of temporal shifts.
Optimum Testing Strategy for COVID-19 and Its Effect on Health Expenditure in India: An Experience of the Initial 155 Days of the Pandemic
Authors: Ghosh Saswata , Das Arup Kumar , Yadav Akhilesh
Published: January 2021

India has gradually increased its testing capacity of COVID-19 by mid-September 2020. However, the level of testing is substantially low in comparison with many high- and middle-income countries. Evidently, the pandemic in India is likely to be prolonged and affect millions in comparison to other countries, due to its huge population size. The possibility of a sudden upsurge of infections may turn overwhelming, jeopardising the health system, if an appropriate testing policy is not immediately adopted, given that the public health expenditure capacity of India has remained at a suboptimal level. Against this backdrop, a descriptive analysis has been carried out using the published data of the number of infections, tests and daily COVID-19 cases and public health expenditure data published by different sources and available in the public domain. The analysis suggests that a differential strategy is required to deal with the situation, which varies across states and depends upon the health spending capacity of individual states and their population size, among other factors. The specific strategy recommendations would be as follows. First, the testing rate should not be too high or too low, and this can be assessed using a marker: marginal return on testing. Second, India should follow the upper-middle-income-country standard in assessing the testing rate. Third, as a long-term strategy, there is a need to strengthen the public health system to avert a future catastrophe in the form of such pandemic.
Nehru Report, Muslim Demands and the Hindu Mahasabha: Elusive Consensus on Future Constitution
Authors: Jha Bhuwan Kumar
Published: January 2021

The Nehru Report of August 1928 presented the blueprint of a Swaraj Constitution. Encapsulating the demands of the Indians to the colonial government as opposed to the latter’s insistence on seeking opinion through an all-whites commission, the report also presents the historical roots of our present Constitution. Amid opposing claims, consensus over the communal issues in the report, which appeared possible until late 1928, became elusive from the end of December 1928. It was mainly due to the closing of the ranks of significant Muslim leadership behind Jinnah, and an ever-increasing vigilant attitude of the Hindu Mahasabha in not allowing any change beyond what had already been agreed upon. The failure of the report meant an end to the hope of finding a consensual solution to a future Indian Constitution made by the Indians and for the Indians. This, in turn, provided the colonial government with an excuse to impose its scheme through the Communal Award, White Paper and subsequently the Government of India Act of 1935. So, the most elaborate constitutional framework prepared by the leading nationalist leaders during the pre-Independence era finally crumbled under the weight of communal deadlock. This article studies the processes through which the differences over communal representation became so overpowering that they rocked the entire boat. The widening of communal fault lines precipitated by contesting claims over the recommendations of the Nehru Report left serious repercussions over the trajectory of future Indian politics.
Worldwide shadow education and social inequality: Explaining differences in the socioeconomic gap in access to shadow education across 63 societies
Authors: Entrich Steve R
Published: January 2021

This article examines the cross-national differences in socioeconomic accessibility to shadow education (SE) across 63 societies. Drawing on arguments from two competing theoretical models either emphasizing cross-national cultural, economic, and institutional differences (e.g. model of secondary schooling, scale of SE) or universally working social reproduction mechanisms (e.g. enrichment features of SE), this study provides a novel approach to understanding the role of SE for social inequality. More specifically, while the first model explicitly allows equality in access to SE, the latter suggests that SE fosters inequality under all circumstances. Using data from the 2012 Program for International Student Assessment (PISA) and official sources, first, the difference in the probability of top in comparison to bottom socioeconomic strata to use SE is predicted separately for all societies, before analyzing what causes the found considerable cross-national variation in the socioeconomic gap in access to SE at the country level. Results indicate that differences in SE access are linked to incentives for high-performing students to use SE. These incentives are especially common in societies with higher educational institutional differentiation (e.g. early or mixed tracking schooling models). In societies with less stratified education systems, access to SE is more equal, wherefore the potential effect of SE to social inequality is dampened. Overall, findings suggest that simple generalizations based on existing theoretical models provide no comprehensive explanation for the connection between SE and inequality. Instead, prominent beliefs about the relationship between SE and inequality are questioned.
Constructing the understanding of teenagers deviant use of cyberspace
Authors: Sharma Manoj Kumar , Anand Nitin , Kumar Keshav , Lenin Singh Rajkumar , Thakur Pranjali Chakraborty , Mondal Ishita , Kohli Tavleen
Published: January 2021

Cyberspace provides a completely different platform for the expression of one’s needs in comparison to the face-to-face world. The use of cyberspace by teenagers is becoming a major concern due to the emergence of engagement in deviant use of internet applications inclusive of engagement in sexting; excessive and addictive use of the internet, consumption of pornography, and as well as phenomena of internet chat rooms. The online disinhibition, anonymity, personality factors, sensation-seeking behavior, impulsivity, deviant socialization processes, and absence of social systems to educate adolescents about gender sensitivity and sex appear to predispose teenagers for indulgence in deviant usage of cyberspace. There is an urgent need to understand the factors related to deviant use of cyberspace and for offering programs for parents and adolescents on gender sensitivity, sexuality, sex, consent in relationships, and deviant use of internet applications. Such initiatives will help to offer opportunities for a corrective experience through appropriate socialization experiences and enhance cyberliteracy among children and adolescents.
Psychopathological effects of the Coronavirus (Sars-CoV-2) imposed lockdown on vulnerable patients in treatment in a mental health outpatient department for migrants and individuals in poor socioeconomic conditions
Authors: Aragona Massimiliano , Tumiati Maria Cristina , Ferrari Federica , Viale Sonia , Nicolella Gianluca , Barbato Angelo , Cavani Andrea , Costanzo Gianfranco , Mirisola Concetta
Published: January 2021

Background:

The effects of Sars-Cov-2 pandemic may increase vulnerability of migrants.

Aims:

To investigate the effects of the governmental lockdown on the mental health of vulnerable migrants in treatment at an outpatient department.

Method:

In a telephone survey post-migration living difficulties and psychopathological symptoms were investigated, particularly post-traumatic thoughts and nightmares, anxiety, depression, feelings of tension and irritability, other sleep problems, as well as COVID-19 related fears. Psychopathological changes during the lockdown were detected and rated by clinicians. Rates of treatment discontinuation and reasons why were also recorded.

Results:

Of 103 eligible patients, 81 answered the phone call and were included in the study. Mental symptoms were frequent but not as severe as expected. About 32% of patients in psychopharmacological treatment and almost 52% of patients in psychotherapy had discontinued treatment. Patients who were globally considered to have worsened if compared to their pre-coronavirus mental health conditions had in fact higher scores on several mental symptoms but mild specific fears about coronavirus issues, similar to those of patients improved or stable. Worsening was significantly associated with unemployment, lack of VISA, and treatment discontinuation. Shifting the way of providing psychotherapy into a web-based modality was significantly more frequent in stable/improved patients.

Conclusion:

Findings suggest that concrete life problems and treatment discontinuation more than the coronavirus fear, have predominantly affected the mental health conditions of our patients.
Psychiatric morbidity and substance use in migrant workers: A population based study
Authors: Chavan B.S. , Sidana Ajeet , Arun Priti , Rohilla Ravi , Singh Gurvinder Pal , Solanki R.K. , Aneja Jitender , Murara Mankirat Kaur , Verma Madhur , Chakraborty Saikat , Singh Chitra , Sharrma Himanshu , Sharma Raviprakash , Bahri Sanjay , Dushant
Published: January 2021

Background:

The prevalence of mental health problems and substance abuse in the migrant population is higher than the general population.

Aims and Objectives:

To assess the prevalence and pattern of mental health issues and substance use in the migrant population and highlight the association with the reverse migration of migrant workers.

Methodology:

The field staff visited the shelter homes for migrant population in four cities of Northern India (Chandigarh (UT), Bhatinda (Punjab), Panchkula (Haryana) and Jaipur (Rajasthan). After maintaining the social distance and wearing masks by the staff and migrants, written informed consent was taken for participation in the study. The socio-demographic details of reverse migrants were noted down and Hindi version of Patient Health Questionnaire (PHQ-9) for mental health problems and screening tool for pattern of substance abuse was administered. Geographically matched undisplaced were also administered these tools.

Results:

A total of 275 reverse migrants and 276 undisplaced were included in the study. The prevalence of ever use for all the substances among reverse migrants was 44.4% (122/275) and among undisplaced, it was 45.3%. The prevalence of alcohol, tobacco and cannabis was higher than the general population. The prevalence of at least one diagnosis on PHQ-9 is 13.45% (reverse migrants 19.3% and undisplaced 7.6) and the prevalence of other depressive disorder is significantly higher in reverse migrants (17.1%) than undisplaced (4.0%).

Conclusion:

The study concludes that prevalence of mental health issues and substance abuse in migrant population is significantly higher than the general population and the prevalence of at least one diagnosis and other depressive disorder is significantly higher in reverse migrants than undisplaced.
In situ synthesis of CO2 adducts of modified polyethylenimines in polyether polyols for polyurethane foaming
Authors: Yuan Shuai , Long Yuanzhu , Xie Xingyi
Published: January 2021

CO2 adducts from hydrophobically-modified polyethylenimines (PEIs) in powder form are newly-developed environment-friendly blowing agents for polyurethanes (PUs). However, they are difficult to disperse into foaming systems that usually contain polyether polyols as the PU soft segments. Herein, we employ mixtures of di(propylene glycol) monomethyl ether-grafted polyethylenimines (DPG-PEIs) and poly(propylene glycol) (PPG) polyols to absorb CO2, with in situ formation of the CO2 adduct particles as PU blowing agents. Their CO2 saturation degrees, revealed by thermogravimetry, scatter in the range of 93–98%. The DPG side chains tend to be exposed at the particle–matrix interface to stabilize the particles. In addition, some PPG oligomers in the matrix might entangle with the CO2 adduct macromolecules during the in situ particle formation. The entangled PPG chains could further stabilize the suspending particles. The high grafting rate and high molecular weight of the PEI backbones could result in small particles, which largely thicken the foaming systems. The optimized blowing agents, with grafting rates between 5% and 8% and PEI backbone molecular weights not higher than 10k Da, show particle sizes from several hundreds of nanometers to ∼1 μm. The resultant foams demonstrate densities below 50 kg/m3 and compressive strengths over 200 kPa, comparable to the values from industrial foams. This in situ CO2 adduction has potential as a universal method suitable for PU foaming at an industrial scale.
Mothers’ Out-of-Sequence Postsecondary Education and Their Health and Health Behaviors
Authors: Augustine Jennifer March
Published: January 2021

Ample research suggests that the links between higher education and heath are robust and growing in strength. This research, however, tends to assume education was completed prior to assuming other adult roles. Importantly, the life course framework raises the question of whether “out-of-sequence” college completion conveys similar health returns. I investigate this question among a population for whom out-of-sequence schooling has grown more common: lower-educated mothers. This focus is also important given the growing education gap in women’s health and the links between maternal and child health. Data come from the Fragile Families and Child Wellbeing Study (N = 4,898). Analyses involve random intercept and fixed effects models and diverse health measures. Findings suggest that postsecondary education does not improve mother’s health, except for reduced smoking among mothers with high school degrees or less that earned bachelor’s degrees. These findings inform health policy debates and theories linking education to health.
Psychological Formulation, a Critical Viewpoint: Illness Ideology in Disguise
Authors: Joseph Stephen
Published: January 2021

Recent years have seen a surge of interest by clinical psychologists in the idea of psychological formulation. Interest in this idea has also been shown by humanistic psychologists as evidenced by a recent issue of this journal, in which formulation is offered as a possible antidote to diagnosis. In this article, I examine the idea of formulation from the viewpoint of client-centered therapy, offering a critical perspective and concluding that as formulation is ultimately about identifying a specific pathway for a specific problem, it continues to subtly promote a medical ideology, incompatible with client-centered therapy.
The Control–Effort Trade-Off in Participative Pricing: How Easing Pricing Decisions Enhances Purchase Outcomes
Authors: Wang Cindy Xin , Beck Joshua T. , Yuan Hong
Published: January 2021

Participative pricing strategies may influence consumer purchase decisions; this research proposes specifically that firms’ delegation of pricing decisions to consumers can create a control–effort trade-off. Consumers favor greater pricing control but are deterred by the effort involved in deciding what to pay. Strategies such as pay what you want in turn might reduce purchase intentions due to the effort involved. In contrast, strategies that increase feelings of control but not perceived effort, such as pick your price options that let consumers choose from a limited set of prices, could enhance pricing outcomes. A field study and four laboratory experiments confirm these propositions. The findings demonstrate the mixed effects of participative pricing, identify mediating mechanisms that explain these effects, and specify common moderating conditions that shape the outcomes of participative pricing. These results have notable implications for pricing theory and practice.
An Overview of Audiovisual Input as a Means for Foreign Language Acquisition in Different Contexts
Authors: Caruana Sandro
Published: January 2021

Traditional media, such as television and cinema, provide rich audiovisual input that is conducive to language acquisition, as research in the field has shown. This includes contexts where learner-viewers are exposed to a foreign language without subtitles, as well as when exposure occurs using subtitles in their different modalities—interlingual and intralingual. The aim of this review article is to source information from different contexts to explore the extent to which incidental foreign language acquisition occurs through input, identifying how specific linguistic competences benefit from it. The main questions that will be addressed regard age and cognateness, when exposure to foreign audiovisual input occurs both in the absence and in the presence of foreign language learning. Some brief considerations will be forwarded in relation to the impact of dubbing and of recent technological developments on language acquisition.
Adolescent Athletes’ Perceptions of Both Their Coachs’ Leadership and Their Personal Motivation
Authors: Subijana Cristina López de , Martin Luc J. , Tejón Obdulia , Côté Jean
Published: January 2021

Previous studies, framed within the full range leadership approach, have described how the coach’s interpersonal behaviors affected athletic outcomes. However researchers have yet to explore how specific leadership behaviors (transformational vs transactional), as perceived by athletes, may affect athletes’ motivation. The aim of this study was to further examine the link between coaches’ leadership behaviors and athletes’ motivation among high achieving adolescent athletes. Two-hundred and twenty-three elite youth athletes ( M = 15.4 years; SD = 1.6; 53.4% male and 46.6% female) responded to questionnaires pertaining to their coaches’ leadership and their individual motivation levels. We found a direct and linear relationship between transformational leadership and intrinsic motivation, and between transactional leadership and external regulation. None of the moderators we studied (age, gender, age group category, and sport skill level) moderated relations between coaches’ leadership and personal motivation. This research re-emphasized the important interpersonal role that coaches play in athletes’ sport development. We recommend that coaches include more interpersonally focused educational programs that emphasize transformational leadership.
Implementation of a Lung Cancer Screening Program in Two Federally Qualified Health Centers
Authors: Watson Lesley , Cotter Megan M. , Shafer Shauna , Neloms Kara , Smith Robert A. , Sharpe Katherine
Published: January 2021

Using low-dose computed tomography (LDCT) to screen for lung cancer is associated with improved outcomes among eligible current and former smokers (ie, aged 55-77, at least 30-pack–year smoking history, current smoker or former smoker who quit within the past 15 years). However, the overall uptake of LDCT is low, especially in health care settings with limited personnel and financial resources. To increase access to lung cancer screening services, the American Cancer Society partnered with 2 federally qualified health centers (FQHCs) in Tennessee and West Virginia to conduct a pilot project focused on developing and refining the LDCT screening referral processes and practices. Each FQHC was required to partner with an American College of Radiology–designated lung cancer screening center in its area to ensure high-quality patient care. The pilot project was conducted in 2 phases: 6 months of capacity building (January–June 2016) followed by 2 years of implementation (July 2016–June 2018). One site created a sustainable LDCT referral program, and the other site encountered numerous barriers and failed to overcome them. This case study highlights implementation barriers and factors associated with success and improved outcomes in LDCT screening.
Using Dental Health Care Personnel During a Crisis
Authors: Badner Victor , Saraghi Mana
Published: January 2021

The first few months of the coronavirus disease 2019 (COVID-19) pandemic challenged health care facilities worldwide in many ways. Inpatient and intensive care unit (ICU) beds were at a premium, and personnel shortages occurred during the initial peak of the pandemic. New York State was the hardest hit of all US states, with a high concentration of cases in New York City and, in particular, Bronx County. The governor of New York and leadership of hospitals in New York City called upon all available personnel to provide support and patient care during this health care crisis. This case study highlights the efforts of Jacobi Medical Center, located in the northeast Bronx, from March 1 through May 31, 2020, and its use of nontraditional health care personnel, including Department of Dentistry/OMFS (Oral and Maxillofacial Surgery) staff members, to provide a wide range of health care services. Dental staff members including ancillary personnel, residents, and attendings were redeployed and functioned throughout the facility. Dental anesthesiology residents provided medical services in support of their colleagues in a step-down COVID-19–dedicated ICU, providing intubation, ventilator management, and critical and palliative care. (Step-down units provide an intermediate level of care between ICUs and the general medical–surgical wards.) Clear communication of an acute need, a well-articulated mission, creative use of personnel, and dedicated staff members were evident during this challenging time. Although not routinely called upon to provide support in the medical and surgical inpatient areas, dental staff members may provide additional health care personnel during times of need.
Experiment investigation of injection parameters effects on injection stability of a high pressure common rail system
Authors: Gao Ziguang , Li Guoxiu , Li Hongmeng , Xu Chunlong , Kang Yanhong
Published: January 2021

High pressure common rail system can precisely control the injection time and injection pressure to improve the thermal efficiency of the engine. The injection characteristics of the system can affect the combustion and emission process of the engine. Injection stability is defined as variation characteristics of injection. This could have an unignored influence on combustion and engine output, while few study has been published. The primary objective is to establish evaluation systems and methods for injection stability. Then to study injection stability of the high pressure common rail system. Firstly, several parameters that have an important influence on the emission and combustion are identified. Based on the characteristics data obtained, it is verified that the stability parameters are in accordance with the normal distribution. Then, the five characteristic stability parameters of close speed of injection, cycle injection mass, injection delay, maximum injection rate and open speed of injection were quantitatively analyzed by using range, relative range, kurtosis and variance. It is found that the close speed of injection is greatly depend on injection pressure, the range of close speed varies from 1.8 to 5.1 mg/ms when rail pressure varies from 60 MPa to 160 MPa at 0.6 ms energizing time. The stability of injection mass depends on energizing time, the relative range in short energizing time can be four times than long energizing time. The maximum injection rate has similar characteristics with injection mass, it is also depends on energizing time. The range of maximum injection rate is reduced from the average of 0.6–0.7 mg/ms to 0.3 or even 0.2 mg/ms with the increase of energizing time. The injection delay and open speed of injection seems to be greatly affected by pressure fluctuation, since the observed data present complex rules. Pressure fluctuation in common rail can affect injection stability a lot.
Future Building and Emotional Reflexivity: Gendered or Queered Navigations of Agency in Non-Normative Relationships?
Authors: Holmes Mary , Jamieson Lynn , Natalier Kristin
Published: January 2021

This article sets out a conceptual framework for examining future building as an emotionally reflexive practice of intimacy and gendered agency. Emotionally reflexive future building is a relational activity, subject to gendering but open to queering. We illustrate this by drawing on cases taken from three qualitative studies that deal with the future building of women in relationships that do not conform to norms around having and rearing children. By referring to the future building of single mothers, women who are undecided about having children and women in non-cohabiting distance relationships we illustrate the significance of reflexively making sense of one’s own and others’ emotions in navigating gendered constraints and opportunities. Anger, despair, ambivalence, love, guilt and other emotions are key in how women with differing degrees of economic security imagine and try to create futures that queer gender.
Telling Reproductive Stories: Social Scripts, Relationality and Donor Conception
Authors: Nordqvist Petra
Published: January 2021

Storytelling is a fundamental part of human interaction; it is also deeply social and political in nature. In this article, I explore reproductive storytelling as a phenomenon of sociological consequence. I do so in the context of donor conception, which used to be managed through secrecy but where children are now perceived ‘to have the right’ to know about their genetic origins. I draw on original qualitative data with families of donor conceived children, and bringing my data into conversation with social script theory and the concept of relationality, I investigate the disjuncture between the value now placed on openness and storytelling, and the absence of an existing social script by which to do so. I show the nuanced ways in which this absence plays out on relational playing-fields, within multidimensional, intergenerational relationships. I suggest that in order to understand sociologically the significance and process of reproductive storytelling, it is vital to keep both the role of social scripts, and embedded relationality, firmly in view.
Educational Downgrading: Adult Education and Downward Mobility
Authors: Moss-Pech Corey , Lopez Steven H. , Michaels Laurie
Published: January 2021

Scholarship on adult education throughout the life course focuses on the relationship between education and upward mobility. Scholars rarely examine how adults’ educational aspirations or trajectories are affected by downward mobility or an increasingly precarious labor market. Drawing on in-depth qualitative interviews with 21 job seekers in the post–Great Recession labor market in the United States, this article advances the concept of educational downgrading: returning to school in pursuit of a credential lower than the highest level of education one previously sought or attained. We explore three pathways to downgrading connected to downward mobility: occupational dead ends, career reversals, and educational inflation. In the process, we highlight how individuals adjust their practical educational aspirations as they navigate a contemporary economy in which careers are unstable and credentials are needed for many kinds of jobs across the occupational hierarchy.
Self-Questioning Strategy Routine to Enhance Reading Comprehension Among Secondary Students
Authors: Brown Sally A. , Pyle Nicole
Published: January 2021

Reading comprehension expectations in content areas have increased for students during the past decade. Many secondary students, including students with learning disabilities, improve their reading proficiency of grade-level text when they receive explicit instruction. The authors propose a self-questioning strategy routine designed to enhance secondary students’ comprehension of expository text and to increase student engagement in content classes. The routine includes explicit, teacher-directed instruction and incorporates before-, during-, and after-reading activities using modeling and guided practice. A scenario of a secondary teacher implementing the proposed self-questioning strategy routine in a social studies course is presented.
Explaining Residents’ Behavioral Support for Tourism through Two Theoretical Frameworks
Authors: Erul Emrullah , Woosnam Kyle Maurice
Published: January 2021

A plethora of research has concentrated on residents’ degree of support for tourism, albeit focused squarely on either attitudinal or intentional support, and with minimal consideration of how residents’ perceived relationships with tourists may explain support. The focus of this article is therefore to examine a complementary framework linking the theoretical framework of emotional solidarity with the theory of planned behavior to explain residents’ behavioral support for tourism. On-site survey data were collected from 740 residents of the highly popular coastal destination, Izmir, Turkey, to test the proposed model. Of the nine hypotheses examined, eight were supported. Emotional solidarity, attitudinal support for tourism, attitudinal contributions to community, perceived behavioral control, and subjective norms collectively explained 42% of the variance in residents’ behavioral intentions to support tourism. Behavioral intentions, in turn, uniquely explained 23% of the variance in residents’ behavioral support for tourism. Study implications, limitations, and future research suggestions are offered.
The princess at the conference: Science, pacifism, and Habsburg society
Authors: Somsen Geert
Published: January 2021

Historians are showing increasing interest in scientific internationalism, the notion that science transcends national differences and hence advances peace and cooperation. This notion became particularly popular in the decades around 1900, the heyday of the universal expositions and the so-called first era of globalization. In this article I argue that in order to properly historicize scientific internationalism, it is imperative to understand how actors imagined science to have pacifist effects, and to relate their technoscientific to their geopolitical imaginaries. To illustrate this, I analyze the 1911 novel Der Menschheit Hochgedanken (translated as When Thoughts Will Soar) by the famous Austrian pacifist Baroness Bertha von Suttner. It tells the story of a scientific conference whose participants, by the sheer brilliance of their thought, ward off war and preserve world peace. Relating the novel to von Suttner’s own life experiences, I situate her internationalism in the social texture and international relations of the late Habsburg Empire. It appears that Von Suttner mobilized notions of the pacific effects of science with an eye to preserving both the European system of states and the position of the aristocracy.
Influence of poor emotion regulation on disrupted sleep and subsequent psychiatric symptoms in university students
Authors: Nicholson Lee R , Lewis Raphaella , Thomas Kevin GF , Lipinska Gosia
Published: January 2021

Previous studies in the neuroscience and psychology literature works suggest that poor sleep quality is associated with emotion dysregulation, and that poor sleep quality and emotion dysregulation are, independently, associated with the presence and severity of psychiatric symptoms. However, no previous study has examined simultaneous relations among multiple different emotion regulation strategies, sleep quality, and mental health outcomes. Such investigations are particularly important given the extensive literature describing the prevalence and manifestation of poor mental health outcomes in university students. This study investigated the influence of both maladaptive (avoidance and impulsivity) and adaptive (cognitive reappraisal) emotion regulation strategies on sleep quality and, subsequently, on the degree of depressive and posttraumatic symptomatology in a sample of South African university students ( N = 336). Participants completed self-report instruments measuring their tendency to use avoidance, cognitive reappraisal, and impulsivity; their sleep quality; their accessibility to social support; and their number of depressive and posttraumatic symptoms. Structural equation modelling showed that more use of avoidance and impulsivity and less use of cognitive reappraisal negatively affected sleep quality, which, in turn, was associated with the presence of more depressive and more posttraumatic symptoms. Hence, our findings suggest that emotion regulation indirectly exerted its influence on the manifestation of psychiatric symptoms through sleep. We conclude that interventions targeted at improving sleep quality may prove beneficial in lessening the burden of depressive and posttraumatic symptoms in university students.
Desperate Responsibility: Precarity and Right-Wing Populism
Authors: Apostolidis Paul
Published: January 2021

This essay explores the mutual reinforcements between socioeconomic precarity and right-wing populism, and then envisions a politics that contests Trumpism through workers’ organizations that create alternatives to predominant patterns of subject formation through work. I first revisit my recent critique of precarity, which initiates a new method of critical theory informed by Paulo Freire’s political pedagogy of popular education. Reading migrant day laborers’ commentaries on their work experiences alongside critical accounts of today’s general work culture, this “critical-popular” procedure yields a conception of precarity with two defining characteristics. First, precarity is socially bivalent: it singles out specific groups for especially harsh treatment even as it pervades society. Second, precarity constitutes subjects through contradictory experiences of time in everyday work-life, exacerbated by insoluble dilemmas of moral responsibility. Antonio Vásquez-Arroyo’s conception of “political literacy” and Bridget Anderson’s notion of “migrantizing the citizen,” in turn, help us understand how precaritization blocks workers from developing the critical dispositions toward time needed for democratic citizenship. This analysis then makes it possible to elucidate, in dialogue with Daniel Martinez-HoSang and Joseph Lowndes, how precaritized worker-citizenship facilitates the cross-class and multiracial appeal of Trumpism’s white supremacist discourse of national economic decline and resurgence, while normalizing the temporal affects of shock and violence characteristic of Trumpism, as theorized by Lia Haro and Romand Coles. Day laborers’ worker centers, I argue, refunction precaritized time, regenerate political literacy, and migrantize the citizen. A large-scale alternative to right-wing populism thus could emerge if the worker center network were expanded throughout the economy.
Community College Career and Technical Education and Labor Market Projections: A National Study of Alignment
Authors: Sublett Cameron , Tovar Janae
Published: January 2021

Objective: This study sought to determine how aligned community college students’ declared majors were with long-term occupational projections. In addition, the study explored whether this link was sensitive to entry-level education. Method: The current study merged two disparate sources of national education and economic data to form a novel analytic file. The sample of students who attended public, 2-year community colleges were obtained from the Beginning Postsecondary Students Longitudinal Study (BPS:12/14), which tracked a cohort of students from 2011–2012 through 2013–2014. The second data set featured current and projected jobs numbers organized by the U.S. Department of Labor for the years 2016 and 2026. A series of logistic regression models controlling for both observed and unobserved state-level factors were employed to determine alignment. Results: There did not seem to be a clear correlation between community college students’ choice of career and technical education (CTE) major and labor market projections. Preferred model specifications indicated the decisions to major in the two most remunerative CTE cluster areas (information technology [IT] and Science, Technology, Engineering, & Math [STEM]) were negatively associated with projected market growth in a student’s home state. Contributions: Community colleges are particularly suited to provide the CTE coursework needed to respond to local labor shortages, yet it is not clear from existing research to what degree community college students choose major areas of study in CTE fields based on labor market projections in those fields. These results are of interest to researchers in light of federal policy requiring CTE programs match the current and future needs of local economies.
Development of Nd-Fe-B rubber-bonded permanent magnets: Magnetic and mechanical characterization
Authors: El Yaagoubi Mohammed , Schwegler Dietmar
Published: January 2021

In this work, the mechanical and magnetic properties of a new Nd-Fe-B filled Hydrogenated nitrile butadiene rubber (HNBR) mixtures are investigated. The mass fraction of the magnetic particles was specifically modified to determine the magnetic and mechanical property trends. The particles have isotropic properties, so no magnetic fields are used for particle orientation during vulcanization. Increasing the filler concentration of the Nd-Fe-B powder leads to a reduction of the tensile strength and an increase in density, elongation at break and hardness of the mixture. The vulcanization times of the compound at different vulcanization levels show hardly any differences by changing the degree of filling. By increasing the filler content from 67% to 80%, the viscosity of the compound increases by a factor of 1.41, which has a strong influence on the processability of the material. Increasing the filling degree of the powder leads to an increase in remanence and the coercivity field strength HcB. For the coercivity field strength HcJ, hardly any change is detected due to the variation in filling level.
The investigation of effects of environmental conditions on fatigue strength and spring stiffness of rubber materials
Authors: Tan Berkan , Feyzullahoğlu Erol
Published: January 2021

Rubber materials are widely used in many applications. The most important applications of rubber materials are seals, tires, gaskets, hoses, hydraulic-pneumatic systems and vibration absorbers. Today, the working environment of rubbers varies. It has become important to see the responses of developed rubber materials to these challenging working conditions. Most rubber parts are subjected to fluctuating loads that can cause fatigue damage in their work environments. In this study, fatigue strength and spring stiffness of rubber materials under different environmental conditions is investigated. Three general factors that affect fatigue strength of rubber materials are the effects of mechanical loading, environmental effects and the effects of rubber formulation. In this study these factors are examined. For this purpose, fatigue strength and spring stiffness of natural rubber (NR), specially developed natural rubber (S-NR) and ethylene propylene diene monomer (EPDM) rubber were examined. The fatigue tests of rubber samples were performed before and after aging processes. During the study, the static and dynamic stiffness values of the rubber materials were examined before and after aging processes. As a result of experimental study, it was found that fatigue life decreases as a result of accelerated aging and annealing in heated oil processes for NR, EPDM and S-NR samples. Annealing in heated oil process is more effective in reducing fatigue life of rubber samples compared to accelerated aging. In this study, it is seen that S-NR rubber has the highest fatigue strength among rubber materials tested. It has been determined that production of samples with the semi-active vulcanization system is the most important parameter in increasing fatigue strength. In S-NR samples produced with the semi-active vulcanization system, the loss in spring stiffness occurring under different aging conditions is less compared to the loss in spring stiffness in conventional vulcanization system produced NR and EPDM samples.
The effect of nanoparticles shape on the mechanical properties of poly lactic acid matrix
Authors: Daneshpayeh Sajjad , Ghasemi Faramarz Ashenai , Ghasemi Ismail
Published: January 2021

In this research, mechanical properties of poly lactic acid (PLA)-based nanocomposites were investigated. The nanocomposites were fabricated by adding of three types of nano-materials including multi-walled carbon nanotubes (MWCNT), carbon black (CB) nanoparticles and graphene nano-platelets (GnPs) in four levels from 0 to 3 wt.% to PLA matrix by an internal mixer. Tensile and impact tests were performed to obtain the mechanical properties of nanocomposites. Moreover, field-emission scanning electron microscopy (FESEM) was used to observe the state of nano-fillers dispersion. The FESEM images showed that CB nanoparticles and MWCNT are well distributed in the matrix, but that GnPs are agglomerated. The results of the tensile tests showed that the addition of MWCNT and CB nanoparticles increased the tensile strength by 36% and 76% and the elastic modulus by 10% and 68%, respectively. Also, the presence of all three types of carbon fillers at low loading increased the elongation at break of PLA matrix, and this increase was more significant for GnPs by 55% in the 1 wt.% loading. Finally, the PLA polymer become more brittle with the addition of nanotubes and nano-platelets, and its impact strength was reduced. While, the CB nanoparticles increased the absorbing energy and impact strength.
Robust adaptive observer-based finite control set model predictive current control for sensorless speed control of surface permanent magnet synchronous motor
Authors: Usama Muhammad , Kim Jaehong
Published: January 2021

The objective of the paper is to present the efficient and dynamic sensorless speed control of a surface permanent magnet synchronous motor (SPMSM) drive at a wide speed range. For high-performance speed sensorless control, a finite control set model predictive current control (FCS-MPCC) algorithm based on a model reference adaptive system (MRAS) is proposed. With the FCS-MPCC algorithm, the inner current control loop is eliminated, and the limitations of the cascaded linear controller are overcome. The proposed speed sensorless control algorithm provides an efficient speed control technique for the SPMSM drive owing to its fast dynamic response and simple principle. The adaptive mechanism is adopted to estimate the rotor shaft speed and position used in FCS-MPCC for dynamic sensorless control. FCS-MPCC uses a square cost function to determine the optimal output voltage vector (VV) from the switching states that give the low cost index. A discrete-time model of a system is used to predict future currents across all the feasible VVs produced by the voltage source inverter. The VV that reduced the cost function is adopted and utilized. Simulation results showed the efficacy of the presented scheme and the viability of the proposed sensorless speed control design under various load conditions at a wide speed operation range.
Variational method-based distributed optimal guidance laws for multi-attackers’ simultaneous attack
Authors: Wei Xiaoqian , Yang Jianying , Fan Xiangru
Published: January 2021

To solve the problem of cooperative encirclement and simultaneous attack of multiple unmanned aerial vehicles, variational method and Hamiltonian optimization are utilized to design an optimal attack trajectory of multiple attackers pursuing a single target that has fixed initial relative state, fixed final relative state and fixed duration of the attack under condition that the acceleration of the target being estimable. When terminal relative state and attack duration are unknown, online calculation algorithm is used to compute a chain of key intermediate points to create the guidance law and ensure successful deliverance of multiple attackers’ simultaneous attack of the target. The only requirement for the multi-attacker communication network is that it contains a directed spanning tree. The guidance laws can function properly as long as one or more attacker can observe the target. The novel guidance laws practicability are verified by simulation results.
Potential carbon emissions reduction related to the recovery of unutilised waste heat
Authors: Aglén Lina
Published: January 2021

The introduction of district heating will have a significant impact on the building services industry, from the architecture of a building to its operation. This technical note investigates a delimited portion of the potential of currently unutilised heat which has the possibility to supply district heating networks in the UK. The UK industrial sector, wastewater treatment facilities and the existing UK waste incineration plants all produce waste heat available in a temperature range suitable for extraction into district heating networks via commercialised techniques broadly used in other countries.

This technical note presents a comparative literature review, comparing UK statistics and studies with performance data based on Swedish operational facilities. It finds 51.7TWh of currently unutilised heat could be recovered annually, with a significant associated emission decrease if incorporated into the heat supply of the UK building stock.

A quantitative analysis is carried out to compare the identified potential with the current UK heat demand and the potential impact on the UK carbon emissions is estimated. The calculations indicate a reduction of 14% in the required UK total domestic heat supply, despite only including a limited fraction of the available waste heat potential.

Practical application: This technical note serves to highlight and emphasise the large amount of available waste heat potential currently not utilised in the UK. By estimating the impact of waste heat utilisation and incorporation into district heating and heat networks in the UK, the technical note aims to fuel discussion around the further incorporation of waste heat to be utilised in the UK heat sector.