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Occupational Dermatoses by Type of Work in Greece
Eleni Zorba,Antony Karpouzis,Alexandros Zorbas,Theodore Bazas,Sam Zorbas,Elias Alexopoulos,Ilias Zorbas,Konstantinos Kouskoukis,Theodoros Konstandinidis 한국산업안전보건공단 산업안전보건연구원 2013 Safety and health at work Vol.4 No.3
Background: To elucidate the relationship between seven occupational dermatoses (ODs) and 20 types of work in Greece. Methods: This was a prevalence epidemiologic study of certain ODs among 4,000 workers employed in 20 types of enterprise, in 104 companies, in 2006e2012, using data from company medical records, questionnaires, occupational medical, and special examinations. The c2 test was applied to reveal statistically significant relationships between types of enterprises and occurrence of ODs. Results: A high percentage (39.9%) of employees included in the study population suffered from ODs. The highest prevalence rates were noted among hairdressers (of contact dermatitis: 30%), cooks (of contact dermatitis: 29.5%), bitumen workers (of acne: 23.5%), car industry workers (of mechanical injury: 15%), construction workers (of contact urticaria: 29.5%), industrial cleaning workers (of chemical burns: 13%), and farmers (of malignant tumors: 5.5%).We observed several statistical significant correlations between ODs (acute and chronic contact dermatitis, urticaria, mechanical injury, acne, burns, skin cancer) and certain types of enterprises. There was no statistically significant correlation between gender and prevalence of ODs, except for dermatoses caused by mechanical injuries afflicting mainly men [c2 (1) ¼ 13.40, p < 0.001] and for chronic contact dermatitis [c2 (1) ¼ 5.53, p ¼ 0.019] afflicting mainly women. Conclusion: Prevalence of ODs is high in Greece, contrary to all official reports by the Greek National Institute of Health. There is a need to introduce a nationwide voluntary surveillance system for reporting ODs and to enhance skin protection measures at work.
Occupational Dermatoses by Type of Work in Greece
Zorba, Eleni,Karpouzis, Antony,Zorbas, Alexandros,Bazas, Theodore,Zorbas, Sam,Alexopoulos, Elias,Zorbas, Ilias,Kouskoukis, Konstantinos,Konstandinidis, Theodoros Occupational Safety and Health Research Institute 2013 Safety and health at work Vol.4 No.3
Background: To elucidate the relationship between seven occupational dermatoses (ODs) and 20 types of work in Greece. Methods: This was a prevalence epidemiologic study of certain ODs among 4,000 workers employed in 20 types of enterprise, in 104 companies, in 2006-2012, using data from company medical records, questionnaires, occupational medical, and special examinations. The ${\chi}^2$ test was applied to reveal statistically significant relationships between types of enterprises and occurrence of ODs. Results: A high percentage (39.9%) of employees included in the study population suffered from ODs. The highest prevalence rates were noted among hairdressers (of contact dermatitis: 30%), cooks (of contact dermatitis: 29.5%), bitumen workers (of acne: 23.5%), car industry workers (of mechanical injury: 15%), construction workers (of contact urticaria: 29.5%), industrial cleaning workers (of chemical burns: 13%), and farmers (of malignant tumors: 5.5%).We observed several statistical significant correlations between ODs (acute and chronic contact dermatitis, urticaria, mechanical injury, acne, burns, skin cancer) and certain types of enterprises. There was no statistically significant correlation between gender and prevalence of ODs, except for dermatoses caused by mechanical injuries afflicting mainly men [${\chi}^2(1)=13.40$, p < 0.001] and for chronic contact dermatitis [${\chi}^2(1)=5.53$, p=0.019] afflicting mainly women. Conclusion: Prevalence of ODs is high in Greece, contrary to all official reports by the Greek National Institute of Health. There is a need to introduce a nationwide voluntary surveillance system for reporting ODs and to enhance skin protection measures at work.
A. Baza,M. Rossafi 경남대학교 기초과학연구소 2024 Nonlinear Functional Analysis and Applications Vol.29 No.1
In this work, we investigate the generalized Hyers-Ulam stability of quadratic functional inequality in modular spaces satisfying $\Delta_2$-conditions and Fatou property, and in $\beta$-homogeneous Banach spaces.
Optimizing Joint Probabilistic Caching and Channel Access for Clustered D2D Networks
Ramy Amer,Mohamed Baza,Tara Salman,M. Majid Butt,Ahmad Alhindi,Nicola Marchetti 한국통신학회 2021 Journal of communications and networks Vol.23 No.6
Caching at mobile devices and leveraging deviceto-device (D2D) communication are two promising approachesto support massive content delivery over wireless networks. Analysis of such D2D caching networks based on a physicalinterference model is usually carried out by assuming uniformlydistributed devices. However, this approach does not capture thenotion of device clustering. In this regard, this paper proposesa joint communication and caching optimization framework forclustered D2D networks. Devices are spatially distributed intodisjoint clusters and are assumed to have a surplus memorythat is utilized to proactively cache files, following a randomprobabilistic caching scheme. The cache offloading gain is maximizedby jointly optimizing channel access and caching scheme. A closed-form caching solution is obtained and bisection searchmethod is adopted to heuristically obtain the optimal channelaccess probability. Results show significant improvement in theoffloading gain reaching up to 10% compared to the Zipf cachingbaseline.
Conjugated Polyelectrolytes as Efficient Hole Transport Layers in Perovskite Light-Emitting Diodes
Lee, Bo Ram,Yu, Jae Choul,Park, Jong Hyun,Lee, Seungjin,Mai, Cheng-Kang,Zhao, Baodan,Wong, Matthew S.,Jung, Eui Dae,Nam, Yun Seok,Park, Song Yi,Di Nuzzo, Daniele,Kim, Jin Young,Stranks, Samuel D.,Baza American Chemical Society 2018 ACS NANO Vol.12 No.6
<P>Perovskite-based optoelectronic devices have been rapidly developing in the past 5 years. Since the first report, the external quantum efficiency (EQE) of perovskite light-emitting diodes (PeLEDs) has increased rapidly through the control of morphology and structure from 0.1% to more than 11%. Here, we report the use of various conjugated polyelectrolytes (CPEs) as the hole injection layer in PeLEDs. In particular, we find that poly[2,6-(4,4-bis-potassium butanylsulfonate)-4<I>H</I>-cyclopenta-[2,1-<I>b</I>;3,4-<I>b</I>′]-dithiophene)] (PCPDT-K) transfers holes effectively, blocks electron transport from the perovskite to the underlying ITO layer, and reduces luminescence quenching at the perovskite/PCPDT-K interface. Our optimized PeLEDs with PCPDT-K show enhanced EQE by a factor of approximately 4 compared to control PeLEDs with PEDOT:PSS, reaching EQE values of 5.66%, and exhibit improved device stability.</P> [FIG OMISSION]</BR>