bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new design strategy for bandwidth and efficiency enhancement in KA band CMOS power amplifier
Authors: Mirzajani Darestani Mohammad Sadegh , Tavakoli Mohammad Bagher , Amiri Parviz 
Published: September 2020

Purpose
The purpose of this paper is to propose a new design strategy to enhance the bandwidth and efficiency of the power amplifier.

Design/methodology/approach
To realize the introduced design strategy, a power amplifier was designed using TSMC CMOS 0.18um technology for operating in the Ka-band, i.e. the frequency range of 26.5-40 GHz. To design the power amplifier, first, a power divider (PD) with a very wide bandwidth, i.e. 1-40 GHz, was designed to cover the whole Ka-band. The designed Doherty power amplifier consisted of two different amplification paths called main and auxiliary. To amplify the signal in each of the two pathways, a cascade distributed power amplifier was used. The main reason for combining the distributed structure and cascade structure was to increase the gain and linearity of the power amplifier.

Findings
Measurements results for designed power dividers are in good agreement with simulations results. The simulation results for the introduced structure of the power amplifier indicated that the gain of the proposed power amplifier at the frequency of 26-35 GHz was more than 30 dB. The diagram of return loss at the input and output of the power amplifier in the whole Ka-band was less than −8dB. The maximum power-added efficiency (PAE) of the designed power amplifier was 80%. The output P1dB of the introduced structure was 36 dB and the output power of the power amplifier was 36 dBm. Finally, the IP3 value of the power amplifier was about 17 dB.

Originality/value
The strategy presented in this paper is based on the usage of Doherty and distributed structures and a new wideband power divider to benefit from their advantages simultaneously.
Less is more: the role of frugality in the Malaysian hotel industry
Authors: Mohamed Sadom Nur Zulaikha , Quoquab Farzana , Mohammad Jihad , Hussin Nazimah 
Published: September 2020

Purpose
The environmental impact of excessive use of natural resources such as energy and water in the tourism industry has increased significantly. Thus, it is crucial to investigate the notion of frugality in this industry. Particularly, this study aims to examine the effect of green marketing strategies (eco-labelling and environmental advertising) and hotel guests’ green attitude towards frugality in the context of the Malaysian hotel industry. Furthermore, the mediating effect of green attitude is also examined.

Design/methodology/approach
Stimulus-organism-response theory was used to develop the research framework. The data were collected via a self-administered survey questionnaire, which yielded 150 complete and usable responses. A partial least square-structural equation modelling approach was used to validate the proposed model.

Findings
The results of this study revealed that environmental advertising and eco-labelling, directly and indirectly, affect frugality. Moreover, the link between green attitude and frugality also was supported. Furthermore, data supported the mediating effect of green attitude in the relationship between green marketing strategies and frugality.

Practical implications
The findings from this study can benefit hoteliers who are targeting frugal and environmentally conscious consumers. Moreover, the hoteliers will be able to understand the drivers of frugality in the tourism industry. It can assist them to formulate better marketing strategies in attracting and retaining frugal consumers.

Social implications
The findings from this study offer a number of important social implications for society, the local government and the city and tourism council. Particularly, understanding the strategies towards frugality can pave the way towards the formation of a “less consumption” community. Moreover, it will serve as the guideline for designing the green and sustainability campaign for the nation.

Originality/value
This study is among the pioneers to investigate the issue pertaining to frugality in the tourism industry context. This study examines new linkages such as the indirect effect of green marketing strategies towards frugality. Moreover, the mediating effect of green attitude in the relationship between green marketing strategies (eco-labelling and environmental advertising) and frugality is comparatively a new link.
Returning to school: children and young people living with chronic illness
Authors: Gray Nicola J. , Jourdan Didier , McDonagh Janet E. 
Published: September 2020

Purpose
The reopening of schools during the SARS-CoV-2 pandemic is full of challenges for families, which are heightened for children and young people (CYP) who live with chronic illnesses. This paper aims to offer a framework to support the successful return of CYP with chronic illnesses to school using appropriate intersectoral strategies.

Design/methodology/approach
This paper draws on research data on the impact of school closure on CYP with chronic illness and emerging findings of global research about their lives during the pandemic. It is also informed by the perspectives of practitioners in the field, who are working with these CYP and their families.

Findings
A framework based on three different strategies for a successful return is established. A small but significant group of CYP living with conditions such as cancer will not yet return and will need ongoing home education provision. CYP with well-controlled symptoms of chronic illness will benefit from school routines and socialization with peers. CYP with poorly controlled illness will need close supervision and individual plans. All groups will benefit from better intersectoral working across education and health and from recent rapid developments in hybrid learning models and telemedicine.

Originality/value
This viewpoint highlights the need for a strategic approach to the return to school of CYP with chronic illness that goes well beyond classifying them as vulnerable students. This group of CYP is already at risk of lower educational attainment, so widening inequalities must be halted. This paper provides a framework for anchoring local intersectoral approaches adapted to the different situations of CYP.
Implementing E-mentoring with care-experienced youth under “lock-down” – a South African experience
Authors: MacDonald Mandi , Dellis Andrew , Mathews Shanaaz , Marco Jenna-Lee 
Published: September 2020

PurposeThis paper aims to describe the challenges and potential benefits of moving a mentoring programme for young people in care and care leavers to an online mode of delivery in response to the South African Government’s efforts to curb the spread of the novel coronavirus disease COVID-19.Design/methodology/approachA descriptive account incorporating reflections from staff responsible for the move to e-mentoring and from South African and UK researchers undertaking an exploratory study of mentoring vulnerable youth at the time when COVID-19 restrictions were imposed.FindingsE-mentoring can provide an effective means to maintaining the essential elements of a well-established mentoring programme for young people in care and care leavers under government enforced “lock-down”. E-mentoring presents particular challenges and benefits in the South African context. Youth in care and care leavers have unequal access to a digital infrastructure, but this can be overcome by investment in resourcing, equipping and training carers, mentors and mentees. The geographical reach offered by online platforms gives young people access to a more diverse pool of mentors.Originality/valueBoth care leaving services and the use of e-mentoring to meet the needs of vulnerable young people are emerging areas of practice and research interest. This paper brings the two areas together in the context of South Africa under COVID-19 “lock-down” through describing the response of one mentoring programme and highlighting the benefits and challenges.
The 2008–2009 global financial crisis and the cost of debt capital among SMEs: Swedish evidence
Authors: Yazdanfar Darush , Öhman Peter 
Published: September 2020

PurposeThe main purpose of this study is to describe and analyse the relationship between the 2008–2009 global financial crisis and small and medium-sized enterprises' cost of debt capital.Design/methodology/approachStatistical methods, including multiple OLS and dynamic panel data, were used to analyse a longitudinal cross-sectional panel dataset of 3865 Swedish SMEs operating in five industry sectors over the 2008–2015 period.FindingsThe results suggest that the cost of debt was influenced by the financial crisis and another macroeconomic factor, i.e. the interbank interest rate, and by firm-specific factors such as firm size and lagged cost of debt.Originality/valueTo the authors' best knowledge, this is one of few studies to examine the cost of debt among SMEs during the crisis and post-crisis periods using data from a large-scale, longitudinal, cross-sectional database.
Permanent and transitory effect of public debt on economic growth
Authors: Abubakar Attahir Babaji , Mamman Suleiman O. 
Published: September 2020

PurposeThis study examines the effect of public debt on the economic growth of OECD countries by disentangling the effect into permanent and transitory components. The study covers 37 OECD countries.Design/methodology/approachThe Mundlak decomposition was employed to decompose the effect of public debt into its transitory and permanent effect on economic growth. To account for potential endogeneity problem, the Hausman and Taylor estimator was employed to estimate the decomposed model. Further, the study disaggregated the OECD model into country group models for further analysis of the dynamics of the relationship between the variables.FindingsThe findings of the study reveal that in the full OECD model public debt exerts a significant negative permanent and positive transitory effect on economic growth. This was robust to alternative model specifications. The magnitude of the negative permanent effect of debt was found to be larger than the positive transitory effect. Further, the estimates of the disaggregated models reveal that though public debt has a negative permanent effect across all the country groups, it was not the case for the transitory effect of debt. Also, a net public debt model was estimated, and its effect on public debt was found to be largely insignificant, exhibiting a Ricardian-like behaviour.Originality/valueTo the best of our knowledge, this is the first study, particularly in the OECD context that employed the Mundlak transformation to examine the permanent versus transitory effect of public debt on economic growth.
Mechanical, morphological, flamability and thermal properties of artificial wood plastic
Authors: Shafik Emad S. , Tawfic Medhat L. , Younan Adel F. 
Published: September 2020

Purpose
The purpose of this study is to manufacture composites from sawdust and polymer high-density polyethylene (HDPE) with different loading from alum as natural and cheap flame retardant and subsequently characterized using standard analytical tools.

Design/methodology/approach
Artificial wood plastic composites (WPCs) were prepared by mixing HDPE with sawdust as a filler with constant ratio (2:1) using hot press. Polyethylene-graft-maleic anhydride (PE-g-MAH) used as a coupling agent between two parents of the composites with different ratios (2.5, 5, 7 and 10). Alum as a flame retardant was incorporated into HDPE with 5 phr polyethylene grafted with maleic anhydride (PE-g-MAH) with different ratios (10, 15 and 20). Flame retardant efficiency was investigated using differential scanning calorimetry, thermal gravimetric analysis and the technique of ASTM E162.

Findings
The results revealed that the composite containing 5 phr from (PE-g-MAH) exhibited higher mechanical properties and this proved that (PE-g-MAH) act as an efficient coupling agent using the aforementioned ratio. The results also revealed that incorporation of alum as a flame retardant increased the thermal stability of the composites.

Originality/value
Artificial WPCs are ecofriendly materials with a wide range of applications in the constructions field. Moreover, they have high mechanical and physical properties with low cost. Evaluate alum as a natural and cheap flame retardant.
Driving healthcare wearable technology adoption for Generation Z consumers in Hong Kong
Authors: Cheung Man Lai , Leung Wilson K.S. , Chan Haksin 
Published: September 2020

Purpose
Young consumers have increasingly adopted wearable health-care technology to improve their well-being. Drawing on generation cohort theory (GCT) and the technology acceptance model (TAM), this study aims to illuminate the major factors that drive the adoption of health-care wearable technology products by Generation Z (Gen-Z) consumers in Hong Kong.

Design/methodology/approach
A self-administrated online survey was used to collect data from a sample of Gen-Z consumers in Hong Kong with experience in using health-care wearable technology. Data analysis was performed using partial least-squares-structural equation modeling to verify four hypotheses.

Findings
The results reveal that consumer innovativeness (CI) and electronic word-of-mouth referral (EWOM) are significant predictors of perceived credibility, perceived ease of use and perceived usefulness, which subsequently drive online engagement intention and adoption intention (AI).

Practical implications
This research provides practical guidance for marketers of health-care wearable technology products. In particular, CI and EWOM hold the key to young consumers’ product perceptions (and thereby their online engagement and AIs).

Originality/value
This research leverages the insights of GCT to enrich the TAM, specifically by including CI and EWOM as antecedents and online engagement as a consequence in the context of health-care wearable technology. The results of an empirical study enhance theoretical understanding of Gen-Z consumers’ perceptions and behavioral intentions toward health-care wearable technology. They also point to actionable recommendations for marketing this new technology to young consumers.
The sphingosine‐1‐phosphate receptor modulator, FTY720, prevents the incidence of diabetes in Spontaneously Diabetic Torii rats
Authors: Kobayashi Kazuma , Sasase Tomohiko , Ishii Yukihito , Katsuda Yoshiaki , Miyajima Katsuhiro , Yamada Takahisa , Ohta Takeshi 
Published: September 2020

AbstractThe sphingosine‐1‐phosphate (S1P) receptor modulator regulates lymphocyte trafficking, resulting in its depletion from circulation, which ultimately causes immunosuppression. In this study, we investigated the preventive effect of fingolimod (FTY720) in the non‐obese type 2 diabetic model, Spontaneously Diabetic Torii (SDT) rats. The S1P receptor modulator, FTY720 (0.3 mg/kg p.o.), was administered for 12 weeks to SDT rats from 5 to 17 weeks of age. Based on our findings, FTY720 could suppress the incidence of diabetes in SDT rats. Further, glucose intolerance was improved in FTY720‐treated SDT rats at 14 weeks of age. Based on the haematological and histological analyses performed at 17 to 18 weeks of age, a decrease in lymphocytes and monocytes in the peripheral blood and a decrease in lymphocyte and atrophy in spleen occurred in the FTY720‐treated SDT rats. Furthermore, the pancreatic changes, such as inflammation, atrophy, and fibrosis in islets observed in SDT rats were improved by FTY720 treatment. These findings suggest that the immunomodulatory effects of FTY720 reduced the pancreatic lesion in SDT rats, thereby demonstrating its preventive effect against diabetes. The development of diabetes in SDT rats is related to disorders of the immune system. However, the S1P receptor modulator may be useful for treating type 2 diabetes.
Negative illness feedbacks: High‐frisk policing reduces civilian reliance on ED services
Authors: Kerrison Erin M. , Sewell Alyasah A. 
Published: September 2020

AbstractObjectiveThis paper demonstrates that localized and chronic stop‐question‐and‐frisk (SQF) practices are associated with community members’ utilization of emergency department (ED) resources. To explain this relationship, we explore the empirical applicability of a legal epidemiological framework, or the study of legal institutional influences on the distribution of disease and injury.Data and Study DesignAnalyses are derived from merging data from the Philadelphia Vehicle and Pedestrians Investigation, the National Historical Geographic Information System, and the Southeastern Philadelphia Community Health database to zip code identifiers common to all datasets. Weighted multilevel negative binomial regressions measure the influence that local SQF practices have on ED use for this population. Analytic methods incorporate patient demographic covariates including household size, health insurance status, and having a doctor as a usual source of care.Principal FindingsFindings reveal that both tract‐level frisking and poor health are linked to more frequent use of hospital EDs, per respondent report. Despite their health care needs, however, reporting poor/fair health status is associated with a substantial decrease in the rate of emergency department visits as neighborhood frisk concentration increases (IRR = 0.923; 95% CI: 0.891, 0.957). Moreover, more sickly people in high‐frisk neighborhoods live in tracts that have greater racial disparities in frisking—a pattern that accounts for the moderating role of neighborhood frisking in sick people's usage of the emergency room.ConclusionsFindings indicating the robust association reported above interrogate the chronic incompatibility of local health and human service system aims. The study also provides an interdisciplinary theoretical lens through which stakeholders can make sense of these challenges and their implications.
There is plenty of room at the plant science: A review of nanoparticles applied to plant cultures
Authors: Freitas Daniel C. , de Andrade Aline M. , da Costa Luana F. , Azevedo Ricardo A. , Arruda Marco A. Z. 
Published: September 2020

AbstractBecause of the revolution in plant science studies, driven by nanotechnology, with the development of the concept as precision farming, which utilises, among others, nanoparticles (NP) as sensors, nano‐encapsulated fertilisers, among others, the accurate understanding of how NPs affect a plant culture becomes of paramount importance. In this way, this review addresses not only fundamental and important aspects regarding NP production and characterisation, emphasising up‐to‐date developments for these tasks, but also discusses the most recent results in terms of NP internalisation into a plant, to enlarge the comprehension of the interaction between NPs and plants. Because there is a broad horizon opened regarding nanotechnology applied to plant science, this review also presents some possible trends, indicating that there is still plenty of room for future developments. It is also an open field for more work on the effects of NPs on stress responses in plants.
Thermal suit connected to a forced‐air warming unit for preventing intraoperative hypothermia: A randomised controlled trial
Authors: Lauronen Sirkka‐Liisa , Mäkinen Marja‐Tellervo , Annila Päivi , Huhtala Heini , Yli‐Hankala Arvi , Kalliomäki Maija‐Liisa 
Published: September 2020

AbstractBackgroundInadvertent intraoperative hypothermia is a common occurrence in surgical patients. A thermal suit is an option for passive insulation. However, active warming is known to be more effective. Therefore, we hypothesised that a forced‐air warming (FAW) unit connected to the thermal suit is superior to a commercial FAW blanket and a warming mattress in breast cancer surgery.MethodsForty patients were randomised to this prospective, clinical trial to wear either the thermal suit or conventional hospital clothes under general anaesthesia. The Thermal suit group had a FAW unit set to 38°C and connected to the legs of the suit. The Hospital clothes group had a lower body blanket set to 38°C and a warming mattress set to 37°C. Core temperature was measured with zero‐heat‐flux sensor. The primary outcome was core temperature on admission to the recovery room.ResultsThere was no difference in mean core temperatures at anaesthetic induction (P = .4) or on admission to the recovery room (P = .07). One patient in the Thermal suit group (5%) vs six patients in the Hospital clothes group (32%) suffered from intraoperative hypothermia (P = .04, 95% CI 1.9%‐49%). Mean skin temperatures (MSTs) were higher in the Thermal suit group during anaesthesia. No burns or skin irritations were reported. Two patients in the Thermal suit group sweated.ConclusionsA thermal suit connected to a FAW unit was not superior to a commercial FAW blanket, although the incidence of intraoperative hypothermia was lower in patients treated with a thermal suit.
Management of a perforating internal root resorption using mineral trioxide aggregate: a case report with 5‐year follow‐up
Authors: Pereira da Costa Rui , Quaresma Sérgio André , Lopes Fabiane Carneiro , Camargo Rafael , Domingos Pires Mariana , Ginjeira António , Sousa‐Neto Manoel Damião 
Published: September 2020

AbstractInternal root resorption is characterised by progressive loss of tooth substance initiating at the root canal wall as a result of clastic activity. This report describes a case of a perforating internal root resorption on a maxillary central incisor in a 25‐year‐old patient. The perforating internal root resorption was firstly diagnosed with periapical radiographs and assessed with full detail with the aid of CBCT, allowing determination of the extension and areas involved in the resorption lesion, as well as the treatment planning. According to these findings, a MTA barrier was performed on the root, ‐coronally to the resorption lesion, leaving the root apically to the resorption lesion untouched. Clinical findings and periapical radiographs indicated complete resolution of the radiolucency associated with the resorptive defect, with reestablishment of lamina dura along the root and occlusion of the lumen of the root canal in the apical segment, after a 5‐year follow‐up.
Deletion of porcine BOLL is associated with defective acrosomes and subfertility in Yorkshire boars
Authors: Nosková A. , Wurmser C. , Crysnanto D. , Sironen A. , Uimari P. , Fries R. , Andersson M. , Pausch H. 
Published: September 2020

SummaryA recessive sperm defect of Yorkshire boars was detected more than a decade ago. Affected boars produce ejaculates that contain spermatozoa with defective acrosomes, resulting in low fertility. The acrosome defect was mapped to porcine chromosome 15 but the causal mutation has not been identified. We re‐analyzed microarray‐derived genotypes of affected boars and confirmed that the acrosome defect maps to a 12.24 Mb segment of porcine chromosome 15. To detect the mutation causing defective acrosomes, we sequenced the genomes of two affected and three unaffected boars to an average coverage of 11‐fold. Read depth analysis revealed a 55 kb deletion that is associated with the acrosome defect. The deletion encompasses the BOLL gene encoding the boule homolog, an RNA binding protein which is an evolutionarily conserved member of the DAZ (Deleted in AZoospermia) gene family. Lack of BOLL expression causes spermatogenic arrest and sperm maturation failure in many species. Boars that carry the deletion in the homozygous state produce sperm but their acrosomes are defective, suggesting that lack of porcine BOLL compromises acrosome formation. Our findings warrant further research to investigate the role of BOLL during spermatogenesis and sperm maturation in pigs.