A Dual-Band Polarization-Insensitive Frequency Selective Surface for Electromagnetic Shielding Applications.

This paper presents a novel polarization-insensitive dual-band frequency-selective surface (FSS)-based electromagnetic shield. The miniaturized FSS unit cell consists of a modified Jerusalem crossed loop and a corner-modified square loop. These FSS elements are arranged in a co-planner configuration over a single-layer Rogers 5880 substrate and simultaneously offer effective shielding in the X- and Ku-bands. Moreover, the FSS manifests polarization-independent and angularly stable band-reject filter characteristics over various oblique angles of incidence for both the TE and TM polarizations with virtuous attenuation at both resonances. In addition, the FSS structure is modelled into an equivalent lumped circuit to better analyze the phenomenon of EM wave suppression. A finite prototype of FSS is fabricated and tested. The simulated and measured results are in good agreement, thus making it a potential candidate for RF shielding/isolation applications.

Technology-delivered personalized nutrition intervention on dietary outcomes among adults with overweight and obesity: A systematic review, meta-analysis, and meta-regression.

The prevalence of overweight and obesity has continued to increase globally, and one-size-fits-all dietary recommendations may not be suitable for different individual characteristics. A personalized nutrition intervention may be a potential solution. This review aims to evaluate the effects of the technology-delivered personalized nutrition intervention on energy, fat, vegetable, and fruit intakes among adults with overweight and obesity. A three-step comprehensive search strategy was performed from 10 databases and seven clinical registries in published and unpublished trials. A total of 46 randomized controlled trials (RCTs) involving 19,670 adults with overweight and obesity from 14 countries are included. Subgroup and meta-regression analyses were conducted. Meta-analyses showed a reduction of energy intake (-128.05, 95% CI: -197.08, -59.01) and fat intake (-1.81% energy/days, 95% CI: -3.38, -0.24, and -0.19 scores, 95% CI: -0.40, 0.02) in the intervention compared with the comparator. Significant improvements in vegetable and fruit intakes with 0.12-0.15 servings/day were observed in the intervention. Combined one- and two-way interactions had a greater effect on energy intake reduction compared with their counterparts. Meta-regression analyses revealed that no significant covariates were found. Given that the certainty of the evidence was rated as low or very low, further well-designed RCTs with long-term follow-up are warranted.

Impact of Socio-Demographic Attributes and Mutual Gaze of Virtual Humans on Users' Visual Attention and Collision Avoidance in VR.

This study investigated the extent that the non-verbal behaviors of virtual humans (VHs) and their socio-demographic attributes altered users' collision avoidance behaviors in Virtual Reality (VR). Users interacted with VHs representing different levels of ethnicities and gender, exhibiting different conditions of physical movement, and gaze behaviors. The VHs were depicted in three major ethnic conditions namely Asian, Caucasian, and Black. The physical movement states of the VHs were either static in the path of the user or walking toward the user in the opposite direction. The non-verbal gaze behavior of the VHs was either direct gaze or averted gaze. We used an HTC Vive tracking system to track users' performing real walking while we collected objective measures (i,e., continuous gaze, fixation gaze, clearance distance, and travel length), and subjective variables (i.e., game experiences and social presence). The results showed that the ethnicity of the VHs significantly impacted the gaze behavior of the users, and the gender of the VHs affected the user avoidance movement and their reciprocal gaze behavior. Our results revealed that users' physical movement, gaze behaviors, and collision avoidance were moderated by the VHs' perceived ethnicity, gender, and gaze behaviors. Understanding the impact of the socio-demographics attributes of VHs and their gaze behavior on users' collision avoidance is critical for applications in which users are navigating through virtual traffic, crowd, and other inter-personal simulations.

Menstrual, fertility and psychological impacts after uterine compression sutures for postpartum hemorrhage: a prospective cohort study.

BACKGROUND: Uterine compression suture is an important conservative surgical technique in managing atonic postpartum hemorrhage. In this study, we aim to evaluate the subsequent menstrual, fertility and psychological outcomes after uterine compression sutures. METHODS: This was a prospective cohort study between 2009 and 2022 conducted in a tertiary obstetric unit (6000 deliveries per year) in Hong Kong SAR. Women with primary postpartum hemorrhage successfully treated with uterine compression sutures were followed-up in postnatal clinic for two years after delivery. Data on menstrual pattern were collected during each visit. Psychological impact after uterine compression suture was assessed using a standardized questionnaire. Subsequent pregnancies were identified by territory-wide computer registry and telephone interviews. Women with postpartum hemorrhage treated with uterotonic agents only were chosen as controls. RESULTS: In our cohort (n = 80), 87.9% of women had return of menses within six months after delivery. Regular monthly cycle was observed in 95.6% of women. Majority of women reported similar menstrual flow (75%), menstrual days (85.3%) and no change in dysmenorrhea status (88.2%) as compared before. Among eight (11.8%) women who reported hypomenorrhea after uterine compression sutures, two cases of Asherman's syndrome were diagnosed. Among 23 subsequent pregnancies (16 livebirths), no significant differences in outcome were observed except more omental or bowel adhesions (37.5% vs. 8.8%, p = 0.007), recurrence of hemorrhage (68.8% vs. 7.5%, p < 0.001) and repeated compression sutures (12.5% vs. 0%, p = 0.024) were seen in women with previous compression sutures. Over half of the couple declined future fertility after uterine compression sutures with 38.2% of women recalled unpleasant memories and 22.1% reported life-long adverse impact especially tokophobia. CONCLUSION: Majority of women with history of uterine compression sutures had similar menstruation and pregnancy outcomes as compared to those who did not have sutures. However, they had higher intrapartum risk of visceral adhesions, recurrence of hemorrhage and repeated compression sutures next pregnancy. Furthermore, couple could be more susceptible to negative emotional impact.

Effects of digital health interventions on the psychological outcomes of perinatal women: umbrella review of systematic reviews and meta-analyses.

ABSTRACTEvidence about the effects of digital health interventions (DHIs) on the psychological outcomes of perinatal women is increasing but remains inconsistent. An umbrella review was conducted to (1) assess the effect of DHIs on depressive, anxiety and stress symptoms and (2) compare the effects of DHIs on different digital platforms and population natures. Ten databases were searched from inception until December 23, 2022. The Hartung-Knapp-Sidik-Jonkman random-effects meta-analyses were utilised. Methodological quality was evaluated using the Assessment of Multiple Systematic Reviews 2 (AMSTAR-2). Twenty-four systematic reviews with 41 meta-analyses involving 45,509 perinatal women from 264 primary studies were included. The credibility of the evidence of meta-analyses was rated as highly suggestive (4.88%), suggestive (26.83%), weak (51.22%) or non-significant (17.07%) according to AMSTAR-2. Our findings suggest that DHIs are beneficial for reducing stress symptoms. However, conflicting effects were found on anxiety symptoms. Subgroup and meta-regression analyses suggested that DHIs effectively improve depressive symptoms in postnatal women, and DHIs using the website platform are highly effective in stress reduction. DHIs can be implemented adjuvant to usual obstetric care to improve depressive and stress symptoms. Additional well-designed RCTs with long-term follow-up are warranted.

Exploring experiences and needs of perinatal women in digital healthcare: A meta-ethnography of qualitative evidence.

OBJECTIVE: The aim of this review is to identify, appraise, and synthesize the available qualitative evidence on the experiences and needs of perinatal women by using digital technologies in healthcare. METHODS: This review was consolidated following the eMERGe meta-ethnography reporting guidance. We conducted a comprehensive search in eight databases from inception to 12 October 2021. Published and unpublished qualitative and mixed-method studies published in English were included. The methodological quality was assessed using the critical appraisal skill program checklist. A meta-ethnographic synthesis was used according to Noblit and Hare's seven-step iterative process. RESULTS: A total of 3,843 articles were retrieved, and 27 qualitative studies pertaining to 3,775 perinatal women from 13 countries across different ethnicities were included. Four overarching themes emerged for the aspect of experiences: (1) normalization of experience, (2) attainment of valuable knowledge, (3) empowerment and self-confidence boosting, and (4) beneficial features of digital platforms. For the aspect of needs, the derived themes included the following: (1) necessity of credible resources, (2) importance of personalization, (3) concern about cybersecurity, and (4) urging additional support. Our line-of-argument for interpreting the perinatal women's experiences can offer a much greater engagement in digital healthcare, while the findings on the perinatal women's needs can add value for improving the design of digital healthcare in the future. CONCLUSION: This review offers a deeper understanding of the perinatal women's experiences and needs when using digital technologies in healthcare. Our findings provide meaningful recommendations for clinical practice and future research.

A Deployable and Cost-Effective Kirigami Antenna for Sub-6 GHz MIMO Applications.

In this work, a low-cost, deployable, integratable, and easy-to-fabricate multiple-input multiple-output (MIMO) Kirigami antenna is proposed for sub-6 GHz applications. The proposed MIMO antenna is inspired by Kirigami art, which consists of four radiating and parasitic elements. The radiating and parasitic elements are composed of a rectangular stub. These elements are placed in such a way that they can provide polarization diversity. The proposed MIMO antenna is designed and fabricated using a soft printed board material called flexible copper-clad laminate (FCCL). It is observed from the results that the proposed MIMO antenna resonates in the 2.5 GHz frequency band, with a 10 dB reflection coefficient bandwidth of 860 MHz ranging from 2.19 to 3.05 GHz. It is worthwhile to mention that the isolation between adjacent radiating elements is higher than 15 dB. In addition, the peak realized gain of the MIMO antenna is around 11 dBi, and the total efficiency is more than 90% within the band of interest. Moreover, the envelope correlation coefficient (ECC) is noted to be less than 0.003, and the channel capacity is ≥17 bps/Hz. To verify the simulated results, a prototype was fabricated, and excellent agreement between the measured and computed results was observed. By observing the performance attributes of the proposed design, it can be said that there are many applications in which this antenna can be adopted. Because of its low profile, it can be used in 5G small-cell mobile MIMO base stations, autonomous light mobility vehicles, and other applications.

Effects of Small Talk With a Crowd of Virtual Humans on Users' Emotional and Behavioral Responses.

In this contribution, we empirically investigated the effect of small talk on the users' non-verbal behaviors and emotions when users interacted with a crowd of virtual humans (VHs) with positive behavioral dispositions. Users were tasked with collecting items in a virtual marketplace via natural speech-based dialogue with a crowd of virtual pedestrians and vendors. The users were able to engage in natural speech-based conversation in a predefined corpus of small talk content that covered various commonplace small talk topics such as conversations about the weather, general concerns, and entertainment based on similar real-life situations. For instance, the VHs with the small talk ability would ask the users some simple questions to make small talk or remind the users of their belongings. We conducted a between-subjects empirical evaluation to investigate whether the user behaviors and emotions were different between a small talk condition and a non-small talk condition, and examined gender effects of the participants. We collected objective and subjective measures of the users to analyze users' emotions and social interaction behaviors, when in conversation with VHs that either possessed small-talk capability or not, besides task or goal oriented dialogue capabilities. Our result revealed that the VHs with small talk capability could alter the emotions and non-verbal behaviors of the users. Furthermore, the non-verbal behaviors between female and male participants differed greatly in the presence or absence of small talk.

Cross-lagged models of health-related quality of life and breastfeeding across different body mass index groups: A three-wave prospective longitudinal study.

BACKGROUND: Bidirectional relationships between health-related quality of life (HRQoL) and breastfeeding outcomes during the perinatal period across different body mass index (BMI) groups have not been investigated. Understanding the nature of such relations can provide strategies the for development of targeted interventions. OBJECTIVES: This study aims to longitudinally (1) investigate the patterns of HRQoL during the perinatal period across different BMI groups; (2) explore bidirectional associations between HRQoL, breastfeeding attitude, and positive breastfeeding status during the perinatal period, and (3) compare the aforementioned relationships across four BMI groups. METHODS: A three-wave prospective longitudinal design was adopted in the second and third trimesters and six weeks postpartum. Cross-lagged panel analysis was used to examine reciprocal relations between two domains of HRQoL, breastfeeding attitudes, and positive breastfeeding status from antenatal to postnatal periods. Multi-group analyses were conducted to determine whether different patterns exist in these relationships according to the four BMI groups. The BMI was self-reported. Breastfeeding attitude and HRQoL were measured by the Iowa Infant Feeding Attitude Scale and the Medical Outcomes Study Short Form Health Survey, respectively. RESULTS: A total of 781 perinatal multi-ethnic women were recruited in Singapore. Our results showed that the physical HRQoL scores were the lowest at Wave 2 compared with those at Waves 1 and 3, whereas the mental HRQoL scores were the lowest at Wave 3 compared with those at Waves 1 and 2 across different BMI groups. Multigroup cross-lagged path analyses showed that breastfeeding attitudes were an antecedent of physical HRQoL in women with underweight. A cross-lagged relationship was found between breastfeeding attitudes and physical HRQoL scores across Waves 1 and 2 in women with obesity. Chi-square difference tests suggested that two paths (breastfeeding attitudes to Wave 2 physical HRQoL, and Wave 2 mental HRQoL to Wave 3 positive breastfeeding status) were significantly different across the four BMI groups. CONCLUSIONS: Physical and mental HRQoL patterns were different during the perinatal period, pre-conception counselling and perinatal care should be tailored to women's physical and mental health care needs. Reciprocal relations between physical HRQoL and breastfeeding attitudes during pregnancy were found in women with obesity. A flexible and individualised approach should provide for the woman with obesity in a respectful manner.

The Effectiveness of Transcranial Stimulation in Improving Swallowing Outcomes in Adults with Poststroke Dysphagia: A Systematic Review and Meta-analysis.

Transcranial stimulation has been proposed as an alternative rehabilitation therapy for adults with post-stroke dysphagia (PSD). This systematic review sought to determine the effectiveness of transcranial stimulation in patients with post-stroke dysphagia to improve swallowing function. From inception to January 3, 2021, an extensive search was conducted in PubMed, EMBASE, Cochrane, CINAHL, and Scopus, Web of Science. The randomized controlled trials (RCTs) included studies in adults aged 18 years and older who suffered from post-stroke dysphagia. Using Hedges' g as effect size, meta-analyses were conducted using random-effects models. To investigate potential sources of heterogeneity, subgroup analyses, and multivariable meta-regression analyses were conducted. Sixteen RCTs were included in this review, and 13 RCTs were used for meta-analysis. The meta-analysis showed that a large effect size in improving swallowing function after repetitive Transcranial Magnetic Stimulation (g = - 0.86, 95% CI - 1.57, - 0.16) and medium effect size in Transcranial Direct Current Stimulation (g = - 0.61, 95% CI - 1.04, - 0.17) at post-intervention, respectively. Subgroup and meta-regression analysis indicated that stimulation of the esophagus cortical area and middle-aged adults had a greater effect on swallowing function. The overall certainty of evidence assessed using the GRADE approach was low. Despite the positive results, transcranial stimulation requires additional research to reach definitive conclusions about the optimal stimulation protocol and to achieve the greatest benefit. Future trials should be more rigorous and include a larger sample size to demonstrate the efficacy of transcranial stimulation. Transcranial stimulation enables a more efficacious approach to dysphagia mitigation in PSD rehabilitation.

Wearable technology-delivered lifestyle intervention amongst adults with overweight and obese: A systematic review and meta-regression.

BACKGROUND: Globally, overweight and obesity are becoming a growing concern, and wearable technology combined with lifestyle intervention may offer an innovative solution. OBJECTIVE: This review aimed to (1) assess the effectiveness of lifestyle interventions delivered by wearable technology in improving weight loss and physical activity among overweight or obese adults and (2) explore the effects of covariates on intervention outcomes. DESIGN: Systematic review, meta-analysis and meta-regression. METHODS: The criteria for inclusion in the review were that the trial must be a lifestyle modification intervention that utilised wearable technology and had a randomised control design and obese or overweight participants aged 18-64 years. Ten electronic databases were searched from inception to 8 December 2020. The Cochrane Risk of Bias Tool version 1 and Grading of Recommendations, Assessment, Development and Evaluations were adopted to rate risk of bias of individual trials and certainty of evidence, respectively. Stata 16 software was used to conduct the meta-analysis, subgroup analysis and meta-regression analysis. RESULTS: Thirty trials comprising 5,391 adults from 11 countries were included. Meta-analyses found significant changes in weight (-1.08 kg, 95% confidence interval, CI: -1.88, -0.28), body mass index (-0.36 kg/m2, 95% CI: -0.62, -0.09), waist circumference (-1.12 cm, 95% CI: -2.08, -0.16), steps per day (1,243.51 steps, 95% CI: 111.51, 2375.51), steps per day change (456.18 steps, 95% CI: 40.61, 871.76), systolic pressure (-2.57 mmHg, 95% CI: -4.57, -0.56) and diastolic pressure (-2.10 mmHg, 95% CI: -3.43, -0.77). Significant differences were found between subgroups regarding region (Q = 7.35, p = 0.01), lifestyle component (Q = 8.51, p = 0.01) and registration protocol (Q = 20.24, p < 0.01). The multivariable meta-regression model suggested that year of publication (adjusted ß = 0.20, 95% CI: 0.07, 0.34, p = 0.003), mean age (adjusted ß = -0.94, 95% CI: -0.14, 0.04, p < 0.001) and duration (adjusted ß = 0.17, 95% CI: 0.09, 0.25, p < 0.001) had significant effects on the mean difference of weight change. DISCUSSION: The majority of the certainty of evidence was graded moderate to high, which suggests that interventions utilising wearable technology may improve body mass index, waist circumference and physical activity of participants. These findings may aid in the development of future health interventions. However, the current review was limited to self-selected samples and trials conducted in English. REGISTRATION: PROSPERO Number: CRD42021232871  (Blind ID).

High body mass index and sleep problems during pregnancy: A meta-analysis and meta-regression of observational studies.

Despite the well-established correlation of weight and sleeping problems, little is known about the nature of the association. The present study examined whether pregnant women with high body mass index have a risk of developing sleep problems, and identified any covariates that affect this relationship. We systematically searched electronic databases, specialized journals, various clinical trial registries, grey literature databases and the reference list of the identified studies. All observational studies were obtained from inception until 9 August 2020. The Newcastle-Ottawa Scale was adopted to assess the quality of studies. Stata software was used to conduct meta-analysis and meta-regression. Forty-six observational studies involving 2,240,804 participants across 16 countries were included. Quality assessment scores ranged from 4 to 10 (median = 6). Meta-analyses revealed that the risk of sleep apnea, habitual snoring, short sleep duration and poor sleep quality is increased in pregnant women with high body mass index, but not for daytime sleepiness, insomnia or restless legs syndrome. Subgroup differences were detected on body mass index between different regions, nature of population, year of publication, age group and study quality. Random-effects meta-regression analyses showed that year and quality of publication were covariates on the relationships between pre-pregnant body mass index and sleep apnea risk. Our review shows that sleep apnea, habitual snoring, short sleep duration and poor sleep quality are important concerns for pregnant women with high body mass index. Developing screening and targeted interventions is recommended to promote efficacious perinatal care.

Effect of digital cognitive behavioral therapy on psychological symptoms among perinatal women in high income-countries: A systematic review and meta-regression.

Several reviews focused on the use of digital cognitive behavioral therapy (CBT) across different populations. This review synthesized randomized controlled trials (RCTs) that evaluated the effectiveness of digital CBT on psychological symptoms (depression, anxiety, and stress symptoms). An extensive search was conducted in 10 databases from inception until August 29, 2021. A meta-analysis using a random-effects model was performed using Hedges' g. The potential sources of heterogeneity were explored through subgroup analyses and meta-regression analysis. A total of 18 RCTs in 2514 perinatal women were identified from over 23 countries. The sample size ranged from 25 to 910. Meta-analyses showed that digital CBT significantly reduced depression (g = -0.56, 95% CI: -0.85, -0.27, I2 = 84.81%, p < 0.001), anxiety (g = -0.30, 95% CI: -0.44, -0.17, I2 = 0%, p < 0.001), and stress (g = -0.75, 95% CI: -0.95, -0.56, I2 = 0%, p < 0.001) symptoms at post-intervention and stress symptoms at follow-up (g = -0.52, 95% CI: -0.93, -0.11, I2 = 0%, p = 0.01) compared with those in the control group. Subgroup analyses highlighted that the intervention was effective when CBT was combined with other therapeutic components which delivered via a mobile application. Preferable features of intervention should be more than eight sessions and conducted for than 6 weeks among postnatal women. Multivariable meta-regression showed that age was a significant covariate on depression symptoms. The sample size in the selected RCTs was small, and the overall quality of the evidence was very low. Digital CBT is a potential intervention for alleviating psychological outcomes in perinatal women. This review suggests the essential features to optimize the intervention effect. Further well-designed RCTs with large sample sizes are necessary.

Rotational Doppler effect by space-time-coding metasurfaces for nonreciprocal electromagnetic isolation.

Metasurfaces are artificial structures that can arbitrarily manipulate electromagnetic (EM) wavefronts. We propose a nonreciprocal EM isolating surface based on space-time-coding metasurfaces that generates orbital angular momentum (OAM)-carrying beams with electronic rotational Doppler effect. The region between two parallel 1-bit programmable space-time-coding OAM metasurfaces, one each for frequency and OAM order up-conversion and down-conversion, induce rotational Doppler shifts from opposing incident directions. An intermediate frequency-selective surface with highpass characteristics transmits the up-conversion signals and blocks the down-conversion signals. Hence, the EM waves are sensitive to illumination direction, exhibiting EM isolation responses, and the incident waves are only transmitted unidirectionally.

Effectiveness of digital psychotherapeutic intervention among perinatal women: A systematic review and meta-analysis of randomized controlled trials.

BACKGROUND: The perinatal period is a challenging time of substantial emotional, physiological, social, and relational changes. Depression, anxiety, and stress symptoms are common, and co-exist in the perinatal period. Digital technology continues to grow at an unprecedented pace with wide application, including psychotherapeutic intervention. A growing number of meta-analyses supported the application of digital psychotherapeutic intervention across different populations, but relatively few meta- and meta-regression analyses have concentrated on perinatal women. AIM: To evaluate the effectiveness of digital psychotherapeutic intervention on improving psychological outcomes among perinatal women and identify its essential features. METHODS: Randomized controlled trials (RCTs) were obtained from eight databases, including Cumulative Index to Nursing and Allied Health Literature, Cochrane Library, Embase, Scopus, PsycINFO, PubMed, Web of Science, and ProQuest Dissertation and Theses from inception up until November 24, 2020. Comprehensive Meta-analysis 3.0 software was used to conduct meta- and meta-regression analyses. The Cochrane risk-of-bias tool and the Grading of the Recommendation, Assessment, Development, and Evaluation system were adopted to assess the individual and overall qualities of the evidence, respectively. RESULTS: A total of 25 RCTs that included 3239 women were identified. Meta-analyses revealed that intervention significantly improved depression (Hedges's g = 0.49), anxiety (g = 0.25), and stress (g = 0.47) symptoms compared to the control. Subgroup analyses demonstrated that a website platform with ≥ eight therapist-guided sessions using the theoretical principle of cognitive behavioral therapy was more effective than other treatments in improving depression symptoms in postnatal women. Meta-regression analyses observed that the age of perinatal women and the type of psychotherapy also had statistically significant effects on depression symptoms. Egger's regression asymmetry tests suggested that no publication biases occurred, but the overall quality of the evidence was very low. CONCLUSION: This review suggests that digital psychotherapeutic intervention may be a potential solution to reduce psychological problems in perinatal women. Further high-quality RCTs with large sample sizes are needed.

Experimental demonstration of a time-domain digital-coding metasurface for a Doppler cloak.

By generating an artificial Doppler shift, a Doppler cloak can compensate for the Doppler shift from a moving object. An object covered by a Doppler cloak will be detected as a static object, even if it is actually moving. Herein, we experimentally demonstrate the Doppler cloak in a radar system using a time-domain digital-coding metasurface. We theoretically illustrate an active metasurface with a modulated reflection phase that can imitate the motion of moving, thereby generating an artificial Doppler shift for a Doppler cloak. Moreover, a reflective metasurface composed of voltage-controlled varactor diodes with a 3-bit reflection phase was designed and fabricated. Finally, we experimentally demonstrate that an artificial Doppler shift for a Doppler cloak is obtained from the proposed metasurface using a discrete time-varying bias voltage. Simulation and measurement results show that the proposed time-domain digital-coding metasurface can cancel the Doppler shift and serve as a Doppler cloak. The proposed metasurface may have potential applications in a Doppler radar illusion, Doppler cancellation in vehicle-to-vehicle communications, and wireless communications.

Humanoid robot-assisted interventions among children with diabetes: A systematic scoping review.

BACKGROUND: Although the humanoid robot is highly engaging for children, whether humanoid robot-assisted interventions could help in diabetes management is still unclear. OBJECTIVES: This review aimed to elucidate the roles of humanoid robot in managing diabetes and observe the effects of humanoid robot-assisted interventions among children with type I diabetes mellitus. METHODS: Arksey and O'Malley's methodological framework was used to conduct this scoping review. DATA RESOURCE: We conducted a comprehensive search in 10 databases, including IEEE Xplore Digital Library, CINAHL, Cochrane Library, EMBASE, PubMed, Scopus, Web of Science, ProQuest, WanFang, and CNKI, from May 1, 1989 to February 1, 2020. The reference lists of key texts were examined and citation chaining was conducted. In addition, our team searched gray literature and relevant journals to maximise the searching. REVIEW METHODS: Two independent reviewers examined all full articles for fitness with the eligibility criteria. Items of data extraction included the characteristics of articles, description of intervention, and mechanism of humanoid robot in improving the management of children with diabetes. RESULTS: A total of 2,755 articles were retrieved, 22 of which were included from five countries across different ethnicities. Five roles of humanoid robots in managing diabetes among children with type I diabetes mellitus were identified: disease manager, educator, advocator, emotional supporter, and communicator. To some extent, effects seem to be related to the positive improvement of affective, experiential, relational, cognitive, and behavioral perspectives from humanoid robot-assisted intervention. CONCLUSIONS: The roles of humanoids have been designed to perform their multidomain functionality. Although many positive effects were observed, the majority of selected articles have methodological issues. Future studies need an improved methodology for large-scale controlled trials.

Uterine compression sutures with additional hemostatic procedures for the management of postpartum hemorrhage.

AIM: The aim of the study was to evaluate the efficacies and possible short-term complications in women receiving uterine compression sutures only and those with additional hemostatic procedures for the management of postpartum hemorrhage. METHODS: It was a retrospective study carried out from year 2009 to 2019 at a tertiary obstetric hospital and included 79 women who underwent uterine compression sutures (B-Lynch sutures, Hayman's sutures and Cho's sutures) for primary postpartum hemorrhage. Thirty-six of these women had additional hemostatic procedures (uterine artery ligation or embolization) performed for bleeding control. RESULTS: Of the 43 women who were primarily treated with uterine compression sutures only, the success rate to preserve the uterus was 97.7% (42/43). In women with uterine compression sutures and additional hemostatic procedures performed, the success rate was 75% (27/36). Among these two groups of women without peripartum hysterectomy, there were no significant differences in the incidence of secondary postpartum hemorrhage (14.8% vs. 11.9%; P = 0.729), postoperative endometritis (14.8% vs. 14.3%; P > 0.99) and retained products of conception (3.7% vs. 9.5%; P = 0.641) during their 6-week postpartum checkup. Three women were diagnosed to have hematometra. No pyometra or uterine necrosis was noted. CONCLUSION: Uterine compression sutures with additional hemostatic procedures are effective to control postpartum hemorrhage and prevent hysterectomy. The short-term complication rate is low. Long-term monitoring is needed to identify rare but potentially dangerous complications.

Design and experimental demonstration of Doppler cloak from spatiotemporally modulated metamaterials based on rotational Doppler effect.

Recently, spatiotemporally modulated metamaterial has been theoretically demonstrated for the design of Doppler cloak, a technique used to cloak the motion of moving objects from the observer by compensating for the Doppler shift. Linear Doppler effect has an angular counterpart, i.e., the rotational Doppler effect, which can be observed by the orbital angular momentum (OAM) of light scattered from a spinning object. In this work, we predict that the spatiotemporally modulated metamaterial has its angular equivalent phenomenon. We therefore propose a technique to observe the rotational Doppler effect by cylindrical spatiotemporally modulated metamaterial. Conversely, such a metamaterial is able to cloak the Doppler shift associated with linear motion by generating an opposite rotational Doppler shift. This novel concept is theoretically analyzed, and a conceptual design by spatiotemporally modulating the permittivity of a voltage-controlled OAM ferroelectric reflector is demonstrated by theoretical calculation and numerical simulation. Finally, a Doppler cloak is experimentally demonstrated by a spinning OAM metasurface in radar system, which the spatiotemporal reflection phase are mechanically modulated. Our work presented in this paper may pave the way for new directions of OAM carrying beams and science of cloaking, and also explore the potential applications of tunable materials and metasurfaces.