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New Primary Standards for Establishing SI Traceability for Moisture Measurements in Solid Materials
Heinonen, M.,Bell, S.,Choi, B. Il,Cortellessa, G.,Fernicola, V.,Georgin, E.,Hudoklin, D.,Ionescu, G. V.,Ismail, N.,Keawprasert, T.,Krasheninina, M.,Aro, R.,Nielsen, J.,Oğ,uz Aytekin, S.,Ö,ste Springer-Verlag 2018 International journal of thermophysics Vol.39 No.1
Shin, Hyeondeok,Kim, Jeongnim,Lee, Hoonkyung,Heinonen, Olle,Benali, Anouar,Kwon, Yongkyung American Chemical Society 2017 Journal of chemical theory and computation Vol.13 No.11
<P>α-Graphyne is a two-dimensional sheet of sp–sp<SUP>2</SUP> hybridized carbon atoms in a honeycomb lattice. While the geometrical structure is similar to that of graphene, the hybridized triple bonds give rise to electronic structure that is different from that of graphene. Similar to graphene, α-graphyne can be stacked in bilayers with two stable configurations, but the different stackings have very different electronic structures: one is predicted to have gapless parabolic bands, and the other, a tunable band gap which is attractive for applications. In order to realize applications, it is crucial to understand which stacking is more stable. This is difficult to model, as the stability is a result of weak interlayer van der Waals interactions which are not well captured by density functional theory (DFT). We have used quantum Monte Carlo simulations that accurately include van der Waals interactions to calculate the interlayer binding energy of bilayer graphyne and to determine its most stable stacking mode. Our results show that interlayer bindings of sp- and sp<SUP>2</SUP>-bonded carbon networks are significantly underestimated in a Kohn–Sham DFT approach, even with an exchange-correlation potential corrected to include, in some approximation, van der Waals interactions. Finally, our quantum Monte Carlo calculations reveal that the interlayer binding energy difference between the two stacking modes is only 0.9(4) meV/atom. From this we conclude that the two stable stacking modes of bilayer α-graphyne are almost degenerate with each other, and both will occur with about the same probability at room temperature unless there is a synthesis path that prefers one stacking over the other.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jctcce/2017/jctcce.2017.13.issue-11/acs.jctc.7b00747/production/images/medium/ct-2017-00747w_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ct7b00747'>ACS Electronic Supporting Info</A></P>
J. Virtanen,M. Toivanen,T. Toimela,T. Heinonen,S. Tuukkanen 한국물리학회 2020 Current Applied Physics Vol.20 No.1
A proof-of-concept method for measuring cardiac tissue contraction force using an in-house-developed piezoelectric cantilever sensor system is demonstrated. Contracting forces of 7.2–16.6 μN (n=5) were measured from a human cardiac tissue construct. Beating cardiac tissue constructs were monitored in-situ under a microscope during the contraction force measurements. Development of the measurement method allows very low forces such as the ones that appear in biological small scale systems to be determined.
Vuokko, Aki,Karvala, Kirsi,Suojalehto, Hille,Lindholm, Harri,Selinheimo, Sanna,Heinonen-Guzejev, Marja,Leppamaki, Sami,Cederstrom, Sebastian,Hublin, Christer,Tuisku, Katinka,Sainio, Markku Occupational Safety and Health Research Institute 2019 Safety and health at work Vol.10 No.3
Background: Chronic nonspecific symptoms attributed to indoor nonindustrial work environments are common and may cause disability, but the medical nature of this disability is unclear. The aim was to medically characterize the disability manifested by chronic, recurrent symptoms and restrictions to work participation attributed to low-level indoor pollutants at workplace and whether the condition shares features with idiopathic environmental intolerance. Methods: We investigated 12 patients with indoor aire-related work disability. The examinations included somatic, psychological, and psychiatric evaluations as well as investigations of the autonomic nervous system, cortisol measurements, lung function, and allergy tests. We evaluated well-being, health, disability, insomnia, pain, anxiety, depression, and burnout via questionnaires. Results: The mean symptom history was 10.5 years; for disabling symptoms, 2.7 years. Eleven patients reported reactions triggered mainly by indoor molds, one by fragrances only. Ten reported sensitivity to odorous chemicals, and three, electric devices. Nearly all had co-occurrent somatic and psychiatric diagnoses and signs of pain, insomnia, burnout, and/or elevated sympathetic responses. Avoiding certain environments had led to restrictions in several life areas. On self-assessment scales, disability showed higher severity and anxiety showed lower severity than in physician assessments. Conclusion: No medical cause was found to explain the disability. Findings support that the condition is a form of idiopathic environmental intolerance and belongs to functional somatic syndromes. Instead of endless avoidance, rehabilitation approaches of functional somatic syndromes are applicable.
Benchmarks and Reliable DFT Results for Spin Gaps of Small Ligand Fe(II) Complexes
Song, Suhwan,Kim, Min-Cheol,Sim, Eunji,Benali, Anouar,Heinonen, Olle,Burke, Kieron American Chemical Society 2018 Journal of chemical theory and computation Vol.14 No.5
<P>All-electron fixed-node diffusion Monte Carlo provides benchmark spin gaps for four Fe(II) octahedral complexes. Standard quantum chemical methods (semilocal DFT and CCSD(T)) fail badly for the energy difference between their high- and low-spin states. Density-corrected DFT is both significantly more accurate and reliable and yields a consistent prediction for the Fe-Porphyrin complex.</P> [FIG OMISSION]</BR>
Clinical Characteristics of Disability in Patients with Indoor Air–Related Environmental Intolerance
Aki Vuokko,Kirsi Karvala,Hille Suojalehto,Harri Lindholm,Sanna Selinheimo,Marja Heinonen-Guzejev,Sami Leppämäki,Sebastian Cederström,Christer Hublin,Katinka Tuisku,Markku Sainio 한국산업안전보건공단 산업안전보건연구원 2019 Safety and health at work Vol.10 No.3
Background: Chronic nonspecific symptoms attributed to indoor nonindustrial work environments are common and may cause disability, but the medical nature of this disability is unclear. The aim was to medically characterize the disability manifested by chronic, recurrent symptoms and restrictions to work participation attributed to low-level indoor pollutants at workplace and whether the condition shares features with idiopathic environmental intolerance. Methods: We investigated 12 patients with indoor airerelated work disability. The examinations included somatic, psychological, and psychiatric evaluations as well as investigations of the autonomic nervous system, cortisol measurements, lung function, and allergy tests. We evaluated well-being, health, disability, insomnia, pain, anxiety, depression, and burnout via questionnaires. Results: The mean symptom history was 10.5 years; for disabling symptoms, 2.7 years. Eleven patients reported reactions triggered mainly by indoor molds, one by fragrances only. Ten reported sensitivity to odorous chemicals, and three, electric devices. Nearly all had co-occurrent somatic and psychiatric diagnoses and signs of pain, insomnia, burnout, and/or elevated sympathetic responses. Avoiding certain environments had led to restrictions in several life areas. On self-assessment scales, disability showed higher severity and anxiety showed lower severity than in physician assessments. Conclusion: No medical cause was found to explain the disability. Findings support that the condition is a form of idiopathic environmental intolerance and belongs to functional somatic syndromes. Instead of endless avoidance, rehabilitation approaches of functional somatic syndromes are applicable.
Dynamics of magnetic droplet soliton: freezing and thawing; coexisting and interacting
S. Chung,M. Ahlberg,S. Jiang,A. Frisk,M. Khademi,R. Khymyn,A. A. Awad,Q. Tuan Le,H. Mazraati,A. Houshang,M. Mohseni,M. Weigand,I. Bykova,F. Groß,E. Goering,G. Schutz,J. Grafe,O. Heinonen,J. Akerman 한국자기학회 2023 한국자기학회 학술연구발표회 논문개요집 Vol.33 No.1