Dynamic Dependency between the Shariah and Traditional Stock Markets: Diversification Opportunities during the COVID-19 and Global Financial Crisis (GFC) Periods

The aim of the present research is to highlight whether there exist any diversification opportunities from investing in developed and developing countries' Shariah-compliant and non-Shariah-compliant stock markets during global financial crisis (GFC) and the COVID-19 pandemic periods. For this purpose, we employ daily data for both Shariah and non-Shariah indices from 29 October 2007 to 31 December 2021. The study uses multivariate GARCH-DCC and wavelet approaches to examine if there exist diversification opportunities in the selected markets. Evidence from this study shows that although the developing markets' stock returns experience high volatility of a similar degree, the conventional indices of Malaysia have the highest volatility among them. This shows that Shariah indices have less exposure to risk and higher possibilities of diversification compared to their conventional counterparts. Regarding developed markets, the Japanese conventional index and the U.S. Shariah indices are more volatile compared to other indices in the market. Moreover, the results of the wavelet power spectrum show significant and higher volatility during the COVID-19 pandemic rather than the GFC. Similarly, the Chinese conventional market experienced minimum variance during the GFC and COVID-19 pandemic period. On the other hand, the results of wavelet-coherence transform indicate that the Japanese Shariah-based market offered better portfolio opportunities for U.S. traders during the GFC and the COVID-19 pandemic periods. Hence, opportunities for investment in this selected market are basically close to zero. Therefore, investors should carefully choose which stocks they can include in their investment portfolio. © 2023 by the authors.

Improving Outcomes in Oesophagectomy Patients

Introduction: Aberdeen Royal Infirmary is a low volume centre carrying out approximately 13 oesophagectomies per annum. Due to minimal exposure to post-operative oesophagectomy patients, staff had low perceived confidence in their management within the Intensive Care Unit (ICU). After an initial pause due to the COVID-19 pandemic, oesophagectomy service provision restarted in June 2020. Prior to this project, no standardised care pathway existed for post-operative oesophagectomy patients. A protocol driven management pathway was implemented within the ICU setting in October 2020. Objective(s): 1. Standardise the first 5 days of post-operative care for oesophagectamies 2. Improve 30 day mortality rate 3. Reduce opiate use on step down to High Dependency Unit (HDU) 4. Improve ICU Medical and Nursing staff perceived confidence in the management of oesophagectomy patients. Method(s): A multi-disciplinary approach was taken, with input from ICU, Surgical, Anaesthetic, Physiotherapy, Nursing, Pain and HDU teams. Standards of care for post-operative oesophagectomy patients were identified and a protocol was subsequently produced for use within ICU with reference to current Enhanced Recovery After Surgery (ERAS) guidelines.1 The protocol covered the first 5 days of post-operative care. It identified tasks to be completed each day and highlighted which staff group was responsible for performing each task. Additionally, an information sheet was distributed to Medical and Nursing ICU staff to educate them on oesophagectomy patients and recognition of potential complications that arise when caring for this patient group. Data on 30 day mortality and opiate use at step down to HDU was collected from electronic notes. This was collected retrospectively prior to implementation of the protocol from January 2019 - July 2020 and prospectively following its implementation, from October 2020 - December 2021. ICU staff perceived confidence in managing post-operative oesophagectomy patients was measured using a combined quiz and survey. It was completed by staff prior to introduction of the protocol. Following implementation of the protocol and distribution of the information sheet, the quiz and survey was repeated to evaluate improvement in staff confidence. Result(s): A total of 38 oesophagectomy cases were identified. 21 cases were reviewed prior to implementation of the protocol, with 1 mortality at 30 days. 17 cases were reviewed following implementation of the protocol, with 0 mortalities at 30 days. Qualitative scoring showed a 20% increase in staff confidence to manage this patient group. Review of drug prescription charts revealed a reduction in dose of modified release opiates at step down to HDU. Conclusion(s): Oesophagectomy is major surgery and causes significant staff anxiety in low volume centres. This protocol has successfully standardised care for this patient group and allowed continuation of this essential service provision during the COVID-19 pandemic. This protocol improved 30 day mortality, reduced opiate use at step down to HDU and improved ICU staff perceived confidence in caring for post-operative oseophagectomy patients.

Sleep Promotion in a Busy Inner City High Dependency Unit

Introduction: Critical care patients commonly have disrupted sleep patterns, with reduction of REM sleep, duration of sleep, increased fragmentation and loss of circadian rhythm.1 Causes include the patients' pathophysiology, medications administered and the busy critical care environment. Data collection showed that our patients were sleeping, on average, for a single block of sleep of 3.5 hours. Delirium rates and its known deleterious effects are highly associated with poor sleep, as well as an impairment of psychomotor performance and neurocognitive dysfunction. Sleep deprivation in the healthy population impairs lymphocyte action, cytokine production and pro-inflammatory balance, as well as a reduction in respiratory function and prolongation of respiratory support.2 Objectives: To firstly measure the sleep quality and explore the reasons behind poor sleep from the patients themselves and to gauge the MDT knowledge and interest in sleep, as a fundamental component of patient management. Then using the results we aimed to improve the duration and quality of the patients sleep on high dependency unit. Method(s): The Adapted Richard Campbell Sleep Questionnaire was given to all patients in the HDU over a 4 week period. Results were analysed, then stored for post intervention comparison. The duration of sleep was documented for all patients and a staff questionnaire was done to assess knowledge and concern of staff. Interventions included a staff sleep awareness week with education and prompts attached to the charting tables promoting sleep. Face masks and ear plugs were freely available to be distributed at the evening ward round. The critical care pharmacist identified medications that could alter the patients ability to achieve REM sleep - e.g. evening administered PPIs, and melatonin was commenced early when sleep was troublesome. Estates fixed soft close doors and soft closed bins supplied for clinical areas. After interventions, there was a further 4 week study period where the above factors were repeated. The need for natural light was highlighted and thus this was optimized in the ward environment and those physiologically able were offered trips outdoors to facilitate normal day night wake cycle. With the COVID pandemic ongoing we also endeavored to limit movement overnight of venerable patients. Result(s): The original data collection was of 45 patients with multiple data points, and the second of 27 patients with multiple data points. Results from the Adapted Richard Campbell Sleep Questionnaire were compared using a one tailed students t test. There were significant increases in the subjective quality of sleep (p=0.046) and quantity of sleep (p=0.00018). Reasons given as to improvement of sleep were reduction in discomfort from monitoring and the bed (p=0.026), reduced ambient light (p=0.031) and reduced impact from the presence of other patients (p=0.002). Conclusion(s): There was marked improvement in the awareness of the importance of sleep within the critical care team after education promoting a change in attitude and culture towards sleep. We are planning a second iteration targeting sedation, noise from monitors and staff and overnight interventions. Although this has been done with level 2 patients, extension to level 3 areas would be beneficial.

QIP leading to significant improvement in DNAR-form completion for COVID-19 patients on intensive care

Background: This QIP was initially conducted during COVID-19 because there were concerns that many patients on the intensive care unit did not have a DNAR form. The pandemic has been a time where establishing appropriate ceilings of care is particularly important. Many of the patients on intensive care had been admitted due to haematological complications arising from COVID-19 including pulmonary embolism, thrombocytopenia and disseminated intravascular coagulation. Lack of DNAR forms has serious implications including the inappropriate use of cardiopulmonary resuscitation and uncertainty for the medical team regarding ceilings of care for critically unwell patients. These were the main drivers for change. Method(s): Data were collected over a 12-month period on ICU from the critical care electronic and written records. This included the presence of a DNAR form, time from ICU admission to DNAR form completion, as well as accuracy and detail on the form. Result(s): Only 50% of patients had a DNAR form completed and of these, cardiopulmonary resuscitation was only recommended in 27% cases. Time taken for completion of the form ranged from 0 to 20 days. Following discussion of these concerning findings in the ITU departmental meeting, several changes were made including mandatory discussions and adding DNAR status for each patient onto handover sheets, as well as electronic reminders for DNAR status. The second cycle of the QIP showed a 35% improvement with 85% of patients having a completed DNAR form. Conclusion(s): This QIP highlights the importance of DNAR form completion for all patients, given that only 27% of the 50% patients who had completed DNAR forms were deemed suitable for CPR. It also shows that introducing measures that make DNAR discussions mandatory leads to an improvement in DNAR form completion. Given the success in intensive care, this QIP has now been expanded to the high dependency unit and haematology wards to improve DNAR form completion for all haematology patients.

TwIdw—A Novel Method for Feature Extraction from Unstructured Texts

Featured ApplicationThe research has a potential application in the field of fake news detection. By using the feature extraction technique, TwIdw, proposed in this paper, more relevant and informative features can be extracted from the text data, which can lead to an enhancement in the accuracy of the classification models employed in these tasks.This research proposes a novel technique for fake news classification using natural language processing (NLP) methods. The proposed technique, TwIdw (Term weight–inverse document weight), is used for feature extraction and is based on TfIdf, with the term frequencies replaced by the depth of the words in documents. The effectiveness of the TwIdw technique is compared to another feature extraction method—basic TfIdf. Classification models were created using the random forest and feedforward neural networks, and within those, three different datasets were used. The feedforward neural network method with the KaiDMML dataset showed an increase in accuracy of up to 3.9%. The random forest method with TwIdw was not as successful as the neural network method and only showed an increase in accuracy with the KaiDMML dataset (1%). The feedforward neural network, on the other hand, showed an increase in accuracy with the TwIdw technique for all datasets. Precision and recall measures also confirmed good results, particularly for the neural network method. The TwIdw technique has the potential to be used in various NLP applications, including fake news classification and other NLP classification problems.

Planning for a potential paediatric bronchiolitis surge: How Inter-Professional Education (IPE) was used to build a practice-ready clinical team

Introduction: Bronchiolitis is the most common cause for paediatric respiratory hospital admissions in young children in the UK.1 Following the relaxation of international SARS-Cov-2 lockdown measures a potential national surge in cases was predicted, highlighting a need for more collaborative working across core specialities.2 This prompted the use of the principles of Inter-Professional Education (IPE) to prepare and deliver an intervention to improve outcomes for these patients.3 Objectives: * To plan, deliver and evaluate an educational intervention focussed on improving the knowledge, skills and attitudes needed to care for a sick child with bronchiolitis * To utilise the principles of IPE to improve competence and confidence across core specialities involved in the care of a sick child with bronchiolitis Methods: A team from the Adult Intensive Care Unit (AICU) and the Paediatric High Dependency Unit (PHDU) from the Royal Berkshire Hospital in Reading delivered an inter-professional teaching session focussed on caring for the sick child with bronchiolitis. The patient journey was utilised as a framework to teach the core knowledge, skills and attitudes needed to clinically manage a child from the Emergency Department (ED) to the Intensive Care Unit (ICU). Each session included a lecture about bronchiolitis - describing pathophysiology and how to recognise the deteriorating child;a skills and drills tutorial - highlighting the need for weight-based calculations for high flow nasal oxygen, intravenous fluids and drugs;and a practical simulation scenario - focussing on the stabilisation and management of a sick child awaiting retrieval to the Paediatric Intensive Care Unit (PICU). Result(s): 135 healthcare professionals from a range of adult and paediatric disciplines involved in the care of children across the patient journey attended one of fourteen teaching sessions delivered between September to December 2021. Attendees completed a feedback questionnaire. One hundred and twenty-two (90%) reported an extremely high degree of satisfaction overall, with many saying they would recommend the teaching sessions to others. Areas of personal and professional development were highlighted across the following main themes: gaining theoretical knowledge;understanding key equipment;performing drug calculations;preparing for intubation and ventilation;assessing the need for chest physiotherapy techniques;and more collaborative team-working. Free text comments demonstrated that the attendees felt the teaching sessions: built confidence through the sharing of new or improved knowledge and skills;facilitated a safe space to practice using simulation;and provided the opportunity to learn about and from each other. Many of the attendees also commented on areas they wanted to reinforce and further develop in daily clinical practice as a direct result of the sessions. Conclusion(s): On-going evaluation is taking place as the teaching sessions continue throughout the year, facilitating the inclusion of additional inter-professional groups from across core specialities. These sessions have been used as a template for the development of further planned IPE with a more varied range of paediatric clinical cases and presentations. These will continue to build on the transferable knowledge and skills that increase competence and confidence in caring for the sick child whilst developing a more collaborative practice-ready workforce.

Towards gold standard care for peripartum women admitted to general intensive care units

Introduction: Critically-ill obstetric patients admitted to general intensive care units (ICU) are a rare and unique population for whom excellent care is essential to prevent devastating physical and psychological morbidity. Admissions are often unanticipated and can present challenges to obstetric and intensive care MDTs. 2018 Enhanced Maternal Care (EMC) Guidelines provide standards for caring for these women, and the 2022 Ockenden review exposed the association of peripartum ICU admission with undertreated psychological trauma and a desire for individualised debriefing [1,2]. We audited the care of obstetric admissions to general ICUs in our quaternary centre. We sought evidence of psychological morbidity to improve follow-up pathways in line with 2022 Ockenden actions. Method(s): Retrospective online case note review of maternity admissions to general ICUs between 1/1/2021-1/1/2022 compared to EMC audit standards. Exclusion criteria: <22/40 gestation, >6/52 postpartum and admissions to our level 2 labour ward high dependency unit. Result(s): 25 patients were admitted to general ICUs over 12 months. Median age was 35-39 years, mean parity was 1. The commonest indication was obstetric haemorrhage (n = 10). 15 of 25 patients required level 3 care, median length of stay was 1.5 days. Documentation of daily obstetric MDT ward round was variable, as was mother-baby contact. 0 of 25 women were seen in obstetric anaesthesia clinic after discharge, only 1 received outpatient ICU follow-up. 50% of postnatal admissions (n = 14) had documentation of significant psychological distress. In response a local checklist was developed with key colleagues to support collaborative working and standardise quality care. It includes automatic referral into obstetric anaesthesia clinic and access to a novel perinatal mental health service. Discussion(s): A peripartum admission to ICU is highly likely to be experienced as traumatic [2]. The incidence of obstetric ICU admissions may increase in the context of greater clinical complexity of the UK pregnant population and COVID-19, whilst the non-anaesthetic ICU workforce may have little obstetric training. Obstetric anaesthetists are therefore uniquely skilled to facilitate quality resuscitation and referral to ICU, but gold-standard holistic care extends beyond admission. We believe regular audit and dedicated local care pathways which incorporate proactive debriefing and psychological health can improve the care of this important group of women.Copyright © 2023 Elsevier Ltd

ICU follow-up clinic provides the opportunity to recognise and address symptoms post critical illness, which may otherwise have been missed

Introduction: It is well documented that survivors of ICU admissions struggle to return to pre-admission level of function because of both physical and psychological burden. Current guidance therefore recommends a follow-up service to review patients 2-3 months post discharge [NICE 2009]. Prior to 2020 University Hospitals Bristol and Weston had no such service. With the increase in patient numbers seen during the COVID-19 pandemic, funding was received to provide a follow-up clinic to COVID-19 survivors. Objective(s): To provide a service that supports and empowers patients with their recovery from critical illness. Improving quality of life, speed of recovery and reducing longer term health care needs. Method(s): Referral criteria for the clinic included COVID-19 patients who received advanced respiratory support within intensive care and the high dependence unit. 8 weeks post discharge patients had a telephone appointment where ongoing symptoms could be identified. Advice around recovery, signposting to resources and onward referrals to appropriate specialities were provided. At 10 weeks post discharge patients had lung function tests and a chest X-ray which were reviewed by respiratory consultants. Based on the combination of these assessments, patients would be discharged or referred into the multidisciplinary team (MDT) follow-up clinic. The face to face clinic consisted of appointments with an intensivist, clinical psychologist, physiotherapist, and occupational therapist. Where needed patients would also be seen by a speech and language therapist or dietitian. Patients were seen only once in follow up clinic but again would be referred onto appropriate services within trust or the community, including but not exclusively community therapy services, secondary care services, SALT, dietetic or psychology clinics. Result(s): One of the key outcomes was the need for 147 onward referrals (an average of 1.13 referrals per patient). This included, 31 referrals to musculoskeletal physiotherapy outpatients for problems originating or made worse by their admission. 20 referrals to secondary care, including cardiology and ENT. 16 referrals to community occupational therapy, for provision of equipment, home adaptations and support in accessing the community. Subjectively, patient feedback was excellent. When asked what they felt was the most valuable thing they had taken from the clinic they reported: "Reassurance";"To know I'm not alone, others feel like this";"They listened to me and gave advice";"The ability to ask anything I wanted and the obvious kindness and support from all the clinicians I saw". Conclusion(s): Onward referral rates made by the follow-up clinic highlight the many issues faced by patients following discharge from ICU and hospital. With timely recognition and management, we can prevent a majority of these symptoms manifesting into chronic problems. This has the potential to lower the long-term burden on health care and improve quality of life for patients in both the short and long term. Without the follow-up clinic, these issues may have been missed or delayed. This reinforces the importance of the follow-up clinic and the need for ongoing investment.

Intensive Care Society State of the Art (SOA) 2022 Abstracts

The proceedings contain 117 papers. The topics discussed include: informing local policy through an audit of the assessment, management and outcomes of intermediate and high-risk patients with pulmonary embolism;an initial exploration into the use of a novel virtual reality system to aid rehabilitation in intensive care;surprising chest radiograph- air in mediastinum;exploring tissue donation as part of end-of-life wishes- a duty of care following death on ICU?;the impact of deprivation on respiratory support unit outcomes in COVID-19 patients, and highlights from wave 2 data in Portsmouth;survey of attitudes towards end of life care as a tool in identifying areas for improvement;a quality improvement project regarding family communication within critical care;sleep promotion in a busy inner city high dependency unit;findings from a regional survey of critical care nursing staff focusing on retention and factors that influence wellbeing;and tracking functional recovery post critical illness.

Why do freelance tour guides still stay after the attack of COVID-19：A path-dependent perspective

The tourism industry has been devastated by COVID-19 (Corona Virus Disease 2019), with tour guides taking the brunt. Through in-depth interviews with 24 freelance tour guides in China and thematic analysis, this study addressed why they continue to work in this field and provided some insights for the freelance tour guides to stay in the tourism industry. The findings revealed that some individuals stay active because of their optimistic and open personality, professional recognition, etc. In contrast, others are passively locked into their current career path due to their cautious personality, fear of losing human capital, inertia, low self-efficacy, and limited job opportunities. These findings promote the application of path dependence theory in the career decision-making of freelancers by enhancing our understanding of the diverse reasons underlying individuals' retention behaviors in an unorganized setting in the context of COVID-19.

A joint and simultaneous prediction framework of weekday and weekend daily-activity travel pattern using conditional dependency networks

Daily activity pattern (DAP) prediction models within the Activity-based Modelling paradigm are being currently developed without adequate consideration of the various interdependencies among activities within a multi-day planning horizon. We hereby propose a conditional dependency network structure based interdependent multilabel-multiclass classification framework for joint and simultaneous prediction of weekday and weekend DAP of an individual. The prime advantage of the proposed modelling framework is flexibility of application of any algorithm for parameter estimation. Random Forest Decision Tree (RFDT), eXtreme Gradient Boosting and Light Gradient Boosting Machine (LightGBM) as the base classifier and probabilistic and non-probabilistic inference approaches are explored for measuring their comparative performance to provide insights for future researchers. Several variables representing neighbourhood characteristics are also investigated as DAP de-terminants along with socio-economic characteristics of individuals for the first time.This model is estimated based on two-days (weekday and weekend) activity-travel diary of 1808 households (6521 individuals) in Bidhanangar Municipal Corporation, India. The non-probabilistic approach-based models are found to achieve higher accuracy (0.81-0.92) compared to probabilistic models (0.76 to 0.82). RFDT and LightGBM are found to be the best performers in the probabilistic and non-probabilistic frameworks respectively. External validation results show that all proposed multiday-interdependent models (80%-94%) perform better than independent models (64%-83%).This framework can be applied to other transportations planning problems like household interaction in ac-tivity generation, joint destination and mode choice. This is also one of the first attempts to investigate the determinants of DAPs of urban commuters in an emerging country like India.

Dysphagia outcomes in COVID-19 patients: experiences in long-term acute care hospital (LTACH).

PURPOSE: Long term acute care hospitals (LTACHs) saw a significant increase in COVID-19 patients with prolonged acute illness recovery. Speech language pathologists (SLP) in LTACHs were integral in assessing swallowing and providing rehabilitation for dysphagia, however, there is limited research on LTACHs and dysphagia. Our aim was to describe this unique dysphagia management experience to improve future patient care. METHODS: Retrospective chart reviews were conducted for patients admitted to RML Specialty Hospital for respiratory failure secondary to COVID-19 from April 1, 2020 to October 31, 2021. Demographic information, videofluoroscopic swallow study (VFSS) reports with Penetration and Aspiration Scale (PAS) scores and SLP notes were reviewed. Descriptive statistics and chi-square analysis were performed. RESULTS: A total of 213 patients met inclusion criteria. Most patients presented with tracheostomy (93.9%) and were NPO (92.5%) on admission. A strong correlation (p = 0.029) was noted between dependence on mechanical ventilation and significant airway invasion, as indicated by PAS score of 7 or 8 on VFSS. There was a strong association (p = 0.001) between patients who had tracheostomy placed within 33 days of VFSS and recommendation for thin liquids. Upon discharge, the majority of patients (83.57%) transitioned successfully to oral diets, however, a strong association (p = 0.009) between higher age (≥ 62) and NPO at discharge was demonstrated. CONCLUSION: Patients admitted post COVID-19 to LTACH, especially those requiring tracheostomy, demonstrated various degrees of dysphagia and benefited from SLP intervention and instrumental swallow assessments. Most patients admitted to LTACH for COVID-19 were successfully rehabilitated for dysphagia.

Bangladesh's ready-made garments sector rebound: Revisiting gendered labor precarity and dependency

Thousands of ready-made garment (RMG) workers, frequently seen as Bangladesh's lifeline for economic growth and poverty alleviation, were sacked arbitrarily just weeks after the Covid-19 pandemic outbreak. The widespread cancellation of existing orders, followed by factory closures and worker layoffs, triggered an unprecedented crisis for RMG workers, the vast majority of whom are women. As the industry is slowly recovering from the initial upheaval and on its way to rebound, this article revisits the impacts of the pandemic on the RMG workers in Bangladesh, who predominantly hails from impoverished rural regions of the country. Using first-hand data and secondary literature, this article offers a compelling account of the pandemic outbreak's disproportionate impact on female RMG workers. As we examine the effects on workers, we also look back at the structural hierarchies and power asymmetries embedded in this sector-a quintessential feature of the contemporary global economy. The article offers three distinct contributions to the emerging literature on the Covid-19 pandemic and its impacts on the changing labor spectrum in the global South. First, it explores the pandemic's broader gendered implications, revealing how it unevenly affected women. Second, it underlines how the pre-existing power dynamic within the global supply chain further exacerbated inequality, marginalization, and workers' precarity in Bangladesh's RMG industry. Lastly, it underscores the unequal interdependence between "core" and "peripheral" countries in the global production and labor landscape, highlighting the asymmetrical nature of their relationship.

Serum catestatin is correlated with clinical parameters in non-critical COVID-19 patients

Introduction: Catestatin (CST) is a peptid with imunomodulatory, antiinflammatory, and antimicrobial activities. Acute coronavirus disease 2019 (COVID-19) caused by the SARS-CoV-2 virus can cause a systemic disease range unpredictably from mild flu-like disease to multiple organ failure. Despite many studies and scientific interest for COVID 19, there is lack of information regarding correlation between serum CST levels and clinical course od COVID 19. There are only few studies investigated CST plasma levels at COVID 19 patients, but mostly at ICU-patients, and those studies revealed that COVID 19 patients release significant amounts of CST in the plasma and CST predicts a poor COVID-19 outcome. In our work the aim was to demonstrate plasma CST levels and correlation with clinical outcome in a group of severe COVID 19 patients admitted in non-ICU department. Method(s): The subjects were patients admitted during second surge of COVID 19 in April and May 2020 in non-ICU unit for COVID 19 patients (high dependency unit) in Infectology department of University Hospital Split, Croatia. The reason of admission was pulmonary infiltrates and COVID 19 positivity confirmed with nucleic acid test. In study were included 32 subjects (25 females, 7 males) (Table 1). An enzyme-linked immunosorbent assay was used for serum CST levels assessment. Result(s): We found significant positive correlation between serum CST levels and: C-reactive protein (r = 0.423, p = 0.008), D-dimers (r = 0.395, p = 0.013), hsTNT (high sensitivity troponin T) (r = 0.603, p < 0.001), proBNP (N-terminal-pro brain natriuretic peptide) (r = 0.569, p < 0.001), and hospitalisation days (r = 0.388, p = 0.014). There was significant difference between groups of participants with SOFA < 3 (n = 18) and SOFA > 3 (n = 14) in catestatin serum levels (7.25 +/- 3.66 vs. 11.05 +/- 9.52 ng/ml;p = 0.065). Conclusion(s): This study confirmed that serum CST levels could have important role as clinical prognostic parameter among non-ICU COVID 19 patients.

Tracking the Evolution of Clusters in Social Media Streams

Tracking the evolution of clusters in social media streams is becoming increasingly important for many applications, such as early detection and monitoring of natural disasters or pandemics. In contrast to clustering on a static set of data, streaming data clustering does not have a global view of the complete data. The local (or partial) view in a high-speed stream makes clustering a challenging task. In this paper, we propose a novel density peak based algorithm, TStream, for tracking the evolution of clusters and outliers in social media streams, via the evolutionary actions of cluster adjustment, emergence, disappearance, split, and merge. TStream is based on a temporal decay model and text stream summarisation. The decay model captures the decreasing importance of textual documents over time. The stream summarisation compactly represents them with the help of cells (aka micro-clusters) in the memory. We also propose a novel efficient index called shared dependency tree (aka SD-Tree) based on the ideas of density peak and shared dependency. It maintains the dynamic dependency relationships in TStream and thereby improves the overall efficiency. We conduct extensive experiments on five real datasets. TStream outperforms the existing state-of-the-art solutions based on MStream, MStreamF, EDMStream, OSGM, and EStream, in terms of cluster mapping measure (CMM) by up to 17.8%, 18.6%, 6.9%, 16.4%, and 20.1%, respectively. It is also significantly more efficient than MStream, MStreamF, OSGM, and EStream, in terms of response time and throughput.

A qualitative life course perspective on covid-lockdowns and couples? division of unpaid labour

Covid-19 lockdowns in many countries were characterised by increases in unpaid labour (e.g. home-schooling), as well as changing working conditions (e.g. remote work). Consequently, a large body of research assesses changes in dual earner couples' gender division of unpaid labour. However, despite the increasingly detailed picture of households' division of labour before and after the onset of the pandemic, it remains unclear how dual earner parents themselves perceive their decision-making regarding labour divisions during lockdowns. Conse-quently, using data from 31 individual in-depth interviews in Belgium, this study adopts a biographical -interpretative method to assess variation in narratives regarding the household division of labour before and during lockdown. Results indicate five ideal type narratives which vary in the extent to which lockdown divisions of unpaid labour exhibit path-dependency or constitute new gender dynamics, but also regarding the balance between individual agency and societal factors as determinants of labour divisions. Taken together, narratives discussing new gender dynamics during lockdowns put forward sector-specific changes in working hours and remote work as external and exogenous determinants. However, most importantly, findings indicate that household decision-making regarding unpaid labour during lockdowns is mostly perceived as path-dependent on pre-covid decision-making (e.g. gender specialisation) in the context of structural (e.g. gendered leave schemes) and normative boundaries (e.g. gendered parenting norms). Such path-dependencies in the decision-making underlying quantitatively identifiable divisions of unpaid labour during lockdowns are likely to be neglected in the absence of a qualitative life course perspective.

A spline-based time-varying reproduction number for modelling epidemiological outbreaks

We develop in this manuscript a method for performing estimation and inference for the reproduction number of an epidemiological outbreak, focusing on the COVID-19 epidemic. The estimator is time-dependent and uses spline modelling to adapt to changes in the outbreak. This is accomplished by directly modelling the series of new infections as a function of time and subsequently using the derivative of the function to define a time-varying reproduction number, which is then used to assess the evolution of the epidemic for several countries.

Media dependency, uses, and gratifications, and knowledge gap in online learning during the COVID-19 pandemic: The case of Afghanistan and Turkey

This study aims to address how dependency on media for learning purposes increased dramatically during COVID-19 by assessing the effects of online learning on students' academic performance during the COVID-19 pandemic with a specific focus on Afghanistan and Turkey. Through the theoretical framework of the uses and gratifications theory, the study tries to explain the uses of devices to use the internet for learning purposes to gratify the needs of students during the pandemic. Furthermore, the study tries to address how the knowledge gap between students of different countries affects students' academic performance during online learning and their uses and gratifications of media during COVID-19. The study followed the quantitative research method where primary data was collected from 400 participants (200 Afghan and 200 Turkish students) through a close-ended survey questionnaire.The study found that Turkish students were more satisfied with the online learning process during the COVID-19 pandemic than Afghan students. Furthermore, there is a considerable difference in attitude, perceived impact, and satisfaction with online learning during the COVID-19 pandemic among Afghan and Turkish students. Due to the knowledge gap, Turkish students had a better attitude toward online learning during the pandemic as compared to Afghan students. The study also found that Turkish students perceived a more significant impact of online learning on their academic performance during the COVID-19 pandemic in contrast to Afghan students. Limited access to different media and technological resources for Afghan students shaped their learning outcomes by lowering their academic performance.

Agricultural Trade and Investments between Latin America and China: Development, Implications, and Challenges

Agriculture has progressively decreased in its proportion of the value of international trade flows, being largely surpassed by extractive industries and, above all, manufacturing. Latin America, and especially South America, however, is one of the regions where the highest percentage of total trade comes from agricultural trade. China has become a preferred destination for Latin American agricultural exports, with China seeing Latin America as a strategic partner in guaranteeing its food security. The objective of this chapter is to analyze the agricultural trade and investment relationship between China and Latin America, starting with an overview of the recent evolution of agricultural export and import flows between China and Latin America and its implications, followed by an analysis of the agricultural investment strategies that China has developed in Latin America and the agricultural trade agreements China has made with Latin American countries, and finishing with an exploration of the effects of COVID-19 on Sino-Latin American agricultural trade and some adaptation strategies that have been implemented. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.