ORCID Profile
0000-0001-9103-2427
Current Organisations
King's College London
,
Daegu Gyeongbuk Institute of Science & Technology
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Publisher: American Chemical Society (ACS)
Date: 16-02-2015
DOI: 10.1021/NN507221F
Abstract: Here we report a fully flexible, foldable nanopatterned wearable triboelectric nanogenerator (WTNG) with high power-generating performance and mechanical robustness. Both a silver (Ag)-coated textile and polydimethylsiloxane (PDMS) nanopatterns based on ZnO nanorod arrays on a Ag-coated textile template were used as active triboelectric materials. A high output voltage and current of about 120 V and 65 μA, respectively, were observed from a nanopatterned PDMS-based WTNG, while an output voltage and current of 30 V and 20 μA were obtained by the non-nanopatterned flat PDMS-based WTNG under the same compressive force of 10 kgf. Furthermore, very high voltage and current outputs with an average value of 170 V and 120 μA, respectively, were obtained from a four-layer-stacked WTNG under the same compressive force. Notably it was found there are no significant differences in the output voltages measured from the multilayer-stacked WTNG over 12 000 cycles, confirming the excellent mechanical durability of WTNGs. Finally, we successfully demonstrated the self-powered operation of light-emitting diodes, a liquid crystal display, and a keyless vehicle entry system only with the output power of our WTNG without any help of external power sources.
Publisher: American Psychiatric Association Publishing
Date: 11-2014
DOI: 10.1176/APPI.PS.201300302
Abstract: This study assessed participants' experienced discrimination and their causal attributions, particularly to mental illness or race-ethnicity. In a cross-sectional study, 202 service users with severe mental illnesses were interviewed to assess their reported experiences of discrimination. The Major Experiences of Discrimination Scale assessed major experiences of discrimination and their recency and frequency across 12 life domains and perceived reasons (attributions). The Everyday Experiences of Discrimination Scale assessed ten types of everyday discrimination and attributions for these experiences. Most participants (88%) reported discrimination in at least one life domain, and 94% reported ever experiencing everyday discrimination. The most common areas of major discrimination were mental health care (44%), neighbors (42%), police (33%), employment (31%), and general medical care (31%). The most common attributions for major discrimination were mental illness (57%), race-ethnicity (24%), education or income (20%), or appearance (19%). Almost half (47%) attributed experiences of major discrimination to two or more causes. No differences were found between racial-ethnic groups in overall experienced discrimination or in main attributions to mental illness. However, compared with the mixed and white groups, participants in the black group were most likely to endorse race-ethnicity as a main attribution (p<.001). Mental illness-related discrimination was found to be a common issue across racial-ethnic groups, and discrimination based on race-ethnicity was prevalent for the mixed and black groups. There is a need for antidiscrimination strategies that combine efforts to reduce the experience of discrimination attributed to mental illness and to race-ethnicity for racial-ethnic minority groups.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA01229A
Abstract: The recent development and perspectives of energy harvesting and storage devices including integration strategies are summarized and discussed.
Publisher: Physicians Postgraduate Press, Inc
Date: 30-07-2019
DOI: 10.4088/JCP.18M12563
Publisher: National Institute for Health and Care Research
Date: 02-2021
DOI: 10.3310/HTA25120
Abstract: The NHS is the biggest employer in the UK. Depression and anxiety are common reasons for sickness absence among staff. Evidence suggests that an intervention based on a case management model using a biopsychosocial approach could be cost-effective and lead to earlier return to work for staff with common mental health disorders. The objective was to assess the feasibility and acceptability of conducting a trial of the clinical effectiveness and cost-effectiveness of an early occupational health referral and case management intervention to facilitate the return to work of NHS staff on sick leave with any common mental health disorder (e.g. depression or anxiety). A multicentre mixed-methods feasibility study with embedded process evaluation and economic analyses. The study comprised an updated systematic review, survey of care as usual, and development of an intervention in consultation with key stakeholders. Although this was not a randomised controlled trial, the study design comprised two arms where participants received either the intervention or care as usual. Participants were NHS staff on sick leave for 7 or more consecutive days but less than 90 consecutive days, with a common mental health disorder. The intervention involved early referral to occupational health combined with standardised work-focused case management. Participants in the control arm received care as usual. The primary outcome was the feasibility and acceptability of the intervention, study processes (including methods of recruiting participants) and data collection tools to measure return to work, episodes of sickness absence, workability (a worker’s functional ability to perform their job), occupational functioning, symptomatology and cost-effectiveness proposed for use in a main trial. Forty articles and two guidelines were included in an updated systematic review. A total of 49 of the 126 (39%) occupational health providers who were approached participated in a national survey of care as usual. Selected multidisciplinary stakeholders contributed to the development of the work-focused case management intervention (including a training workshop). Six NHS trusts (occupational health departments) agreed to take part in the study, although one trust withdrew prior to participant recruitment, citing staff shortages. At mixed intervention sites, participants were sequentially allocated to each arm, where possible. Approximately 1938 (3.9%) NHS staff from the participating sites were on sick leave with a common mental health disorder during the study period. Forty-two sick-listed NHS staff were screened for eligibility on receipt of occupational health management referrals. Twenty-four (57%) participants were consented: 11 (46%) received the case management intervention and 13 (54%) received care as usual. Follow-up data were collected from 11 out of 24 (46%) participants at 3 months and 10 out of 24 (42%) participants at 6 months. The case management intervention and case manager training were found to be acceptable and inexpensive to deliver. Possible contamination issues are likely in a future trial if participants are in idually randomised at mixed intervention sites. No adverse events were reported. The method of identification and recruitment of eligible sick-listed staff was ineffective in practice because uptake of referral to occupational health was low, but a new targeted method has been devised. All study questions were addressed. Difficulties raising organisational awareness of the study coupled with a lack of change in occupational health referral practices by line managers affected the identification and recruitment of participants. Strategies to overcome these barriers in a main trial were identified. The case management intervention was fit for purpose and acceptable to deliver in the NHS. Current Controlled Trials ISRCTN14621901. This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment Vol. 25, No. 12. See the NIHR Journals Library website for further project information.
Publisher: Elsevier BV
Date: 10-2013
DOI: 10.1016/J.ANNEPIDEM.2013.07.012
Abstract: This study compares polydrug use in national and inner city s les to (1) examine patterns of use underlying different prevalence rates and (2) identify how inner city polydrug use needs targeting in ways not suggested by national research. Latent class analyses on indicators of illicit drug use in the last year, hazardous alcohol use, and cigarette smoking were compared between the inner city 2008-2010 South East London Community Health study (n = 1698) and the nationally representative 2007 Adult Psychiatric Morbidity Survey in England (n = 7403). Multinomial logistic regressions then examined latent class solutions with demographic and socioeconomic factors. Both s les revealed three notably similar classes of polydrug users: a "high-drug" group using multiple substances a "moderate-drug" group using cannabis, alcohol, and cigarettes and a "low-drug" group reporting minimal alcohol and cigarette use. However, South East London Community Health reported lower risks of polydrug use for ethnic minorities but not for more educated participants. Despite higher polydrug use prevalence in the inner city, latent classes of polydrug users were similar between s les. Some demographic and socioeconomic factors differed between the s les, suggesting the need for inner city services to use both local and national data for policy planning.
Publisher: Elsevier BV
Date: 03-2015
DOI: 10.1016/J.DRUGALCDEP.2014.12.025
Abstract: Opioid misusers have recognized high mortality but the influence of psychiatric comorbidity in excess cause-specific mortality is unclear. Opioid use disorder (OUD) patients were identified in the South London and Maudsley Case Register. Deaths were identified through database linkage to the national mortality dataset. Standard mortality ratios were calculated to compare mortality risk with the general population. Cox and competing risk regression models were used to investigate the effect of psychiatric comorbidity and psychological health on all-cause and cause-specific mortality (respectively) in OUD patients. Of 4837 OUD patients, 176 had died. Mortality rates were substantially higher than the general population (SMR 4.23 95%CI 3.63-4.90). Among those with OUD, comorbid personality disorder (PD) and comorbid alcohol use disorder (AUD) was associated with increased all-cause mortality in all models, including the fully adjusted model, controlling for socio-demographic factors, severity of drug use, risk behaviours and physical health (HR2.15, 95%CI 1.17-3.95 HR2.28, 95%CI 1.54-3.36). AUD was associated with increased risk of fatal overdose (HR2.57, 95%CI 1.26-5.26) and hepatic-related deaths (HR7.26, 95%CI 2.79-18.86). In iduals with OUD and comorbid PD had almost four times greater risk of liver related deaths compared to those without PD (HR3.76, 95%CI 1.21-11.74). Comorbid severe mental illness and poor psychological health were not associated with increased mortality. This study highlights the importance of assessment for PD and AUD in OUD patients in order to identify in iduals at substantially elevated mortality risk to enable a more personalized approach to their medical care.
Publisher: Cambridge University Press (CUP)
Date: 17-03-2014
DOI: 10.1017/S2045796014000158
Abstract: To explore the role of psychiatric admission, diagnosis and reported unfair treatment in the relationship between ethnicity and mistrust of mental health services. The Mental Illness-Related Investigations on Discrimination (MIRIAD) study was a cross-sectional study of 202 in iduals using secondary mental health services in South London. Two structural equation models were estimated, one using Admission (whether admitted to hospital for psychiatric treatment in the past 5 years) and one using involuntary admission to hospital in the past 5 years. Increased mistrust was directly associated with the latent variable ‘unfair treatment by mental health services and staff’ and with Black or mixed ethnicity in both models. Those with a diagnosis of schizophrenia spectrum (as compared to depression and bipolar disorder) had a lower average score on the latent variable, suggesting that on average they reported less unfair treatment. We found evidence of increased reporting of unfair treatment by those who had an admission in the past 5 years, had experienced involuntary admission, and for people of Black of mixed Black and White ethnicity. Neither prevalence of schizophrenia spectrum nor rates of hospital admission explained the greater mistrust of mental health services found among people of Black and mixed Black and White ethnicity compared with White ethnicity. Rather, people of Black and mixed Black and white ethnicity may be more likely to experience unfair treatment, generating mistrust furthermore, this group is more likely to express mistrust even after accounting for reporting of unfair treatment by mental health services and staff.
Publisher: American Psychiatric Association Publishing
Date: 02-2015
DOI: 10.1176/APPI.PS.201300448
Abstract: This study aimed to test the hypothesis that mental health-related discrimination experienced by adults receiving care from community mental health teams is associated with low engagement with services and to explore the pathways between these two variables. In this cross-sectional study, 202 adults registered with inner-city community mental health teams in the United Kingdom completed interviews assessing their engagement with mental health services (service user-rated version of the Service Engagement Scale), discrimination that they experienced because of mental illness, and other variables. Structural equation modeling was conducted to examine the relationship of experienced discrimination and service engagement with potential mediating and moderating variables, such as anticipated discrimination (Questionnaire on Anticipated Discrimination), internalized stigma (Internalized Stigma of Mental Illness Scale), stigma stress appraisal (Stigma Stress Appraisal), mistrust in services, the therapeutic relationship (Scale to Assess Therapeutic Relationships), difficulty disclosing information about one's mental health, and social support. Analyses controlled for age, race-ethnicity, and symptomatology. No evidence was found for a direct effect between experienced discrimination and service engagement. The total indirect effect of experienced discrimination on service engagement was statistically significant (coefficient=1.055, 95% confidence interval [CI]=.312-2.074, p=.019), mainly via mistrust in mental health services and therapeutic relationships (coefficient=.804, CI=.295-1.558, p=.019). A 1-unit increase in experienced discrimination via this pathway resulted in .804-unit of deterioration in service engagement. Findings indicate the importance of building and maintaining service users' trust in mental health services and in therapeutic relationships with professionals and countering the discrimination that may erode trust.
Publisher: AIP Publishing
Date: 05-2017
DOI: 10.1063/1.4979718
Abstract: The past decade has been especially creative for nanogenerators as energy harvesting devices utilizing both piezoelectric and triboelectric properties. Most recently, self-charging power units using both nanogenerators and energy storage systems have begun to be investigated for portable and wearable electronics to be used in our daily lives. This review focuses on these hybrid devices with self-charging combined with energy harvesting storage systems based on the most recent reports. In this research update, we will describe the materials, device structures, integration, applications, and research progress up to the present on hybrid devices.
Publisher: Springer Science and Business Media LLC
Date: 29-05-2014
Publisher: Wiley
Date: 27-08-2015
DOI: 10.1002/PMH.1307
Publisher: Wiley
Date: 04-2020
Location: United Kingdom of Great Britain and Northern Ireland
Location: Korea, Republic of
Location: United States of America
No related grants have been discovered for Stephani Hatch.