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Item type: Item , Access status: Metadata only , Effects and interaction of humidex and air pollution on influenza : A national analysis of 319 cities in mainland China(2025-06-15) test shivamInfluenza imposes a significant global health burden. This study investigates the effects of humidex and air pollution on influenza and their interactions, using multi-city surveillance data in China. Daily data on reported influenza cases, meteorological factors and air pollution from 319 cities in mainland China over the study period of 2014–2019 were collected. A two-stage analytical framework, comprising distributed lag non-linear model and multivariate meta-analysis, was employed to assess the associations between humidex, air pollution and influenza. Hierarchical and joint effect models were employed to examine their interaction. Nationally, an approximately L-shaped relationship between humidex and influenza was observed, with the highest relative risk (RR) of 2.603 (95 % confidence interval [CI]: 2.195–3.086). Per interquartile range increases in PM2.5, PM10, NO2, SO2, CO and O3 were associated with influenza risk increments of 0.035 (95 % CI: 0.010–0.061), 0.029 (95 % CI: 0.003–0.055), 0.191 (95 % CI: 0.152–0.231), 0.239 (95 % CI: 0.166–0.317), 0.038 (95 % CI: 0.001–0.076) and −0.171 (95 % CI: −0.238–0.099), respectively. A synergistic interaction effect was identified between low humidex and high air pollution as well as different air pollutants. Subgroup analyses indicated females and individuals aged 7–18 years old exhibited higher risks. Stronger effects were observed during winter season and in large cities. This study underscores the urgent need for tailored interventions to mitigate the health impacts in regions with concurrent low humidex and high air pollution.Item type: Publication , Access status: Restricted , On the achievable stability margin for resonant systems with negative imaginary controllers: MEMS force sensor example(2026) Dadkhah, Diyako; Petersen, Ian R.; Moheimani, S. O.RezaThis paper presents a root locus analysis to determine the maximum achievable stability margin for three types of standard single input single output negative imaginary controllers when applied to a single mode undamped resonant plant. The controllers under consideration are integral resonant controllers, positive position controllers and phase lead controllers. It is found that both the integral resonant controllers and the positive position controllers can achieve only a finite stability margin, with the positive position controllers achieving a higher stability margin than the integral resonant controllers. It is also found that at least in theory, phase lead controllers could achieve an arbitrarily large stability margin. The results are also validated experimentally on an experimental platform involving a lightly damped SISO MEMS force sensor.Item type: Item , Access status: Metadata only , Hydrogenation characteristics of p-type poly-Si passivating contacts on textured surface for double-sided TOPCon devices(2025-06-15) Damm, Anna; Bories, Mathias; Benick, Jan; Hanser, Mario; Richter, Armin; Liu, Anyao; Yang, Zhongshu; Lange, Stefan; Miclea, Paul Tiberiu; Polzin, Jana Isabelle; School of Engineering; School of EngineeringAn effective hydrogenation process for polycrystalline silicon based passivating contacts (TOPCon) is crucial to achieve a very high level of surface passivation. This work examines the hydrogenation characteristics of p-type TOPCon on textured surface morphology by applying dielectric layers such as AlOx, SiNx and stacks thereof followed by an activation in a furnace anneal or by fast-firing. In a direct comparison with n-type TOPCon, p-type TOPCon requires higher activation temperatures and a higher activation energy. For a successful integration of n-type and p-type TOPCon into bottom cell precursors with 726 mV implied Voc for tandem devices, stacks featuring AlOx are beneficial to increase the thermal stability especially for n-type TOPCon. With regards to fast-firing processes, the influence of an additional pre- or post-annealing step is investigated. The peak firing temperature can significantly be reduced when applying an annealing step beforehand and a post-firing anneal improves surface passivation to recombination current densities J0s as low as 7.9 fA/cm2 for p-type TOPCon on textured surface which is one of the lowest reported in literature.Item type: Publication , Access status: Metadata only , Grothendieck duality made simple(2020) Neeman, AmnonIt has long been accepted that the foundations of Grothendieck duality are complicated. This has changed recently. By “Grothendieck duality” we mean what, in the old literature, used to go by the name “coherent duality”. This isn’t to be confused with what is nowadays called “Verdier duality”, and used to pass as “ℓ-adic duality”. (The prevailing current terminology—for duality in étale cohomology, that is “ℓ-adic duality”—is historically incorrect. The idea was originally due not to Verdier but to Grothendieck, see his work in SGA5 on what is nowadays called the formalism of the six operations. Since this survey is about coherent duality we elaborate no further.).Item type: Publication , Access status: Metadata only , 1-(3-Chlorophenyl)-4,4,6-trimethyl-3,4-dihydropyrimidine-2(1H)-thione(2011) Yamin, Bohari M.; Salem, Halima FaragIn the title compound, C13H15ClN2S, the dihydropyrimidine ring is essentially planar, with a maximum deviation from the leastsquares plane of 0.122 (3) Å for the unsubstitued olefinic C atom. The dihedral angle between the dihydropyrimidine and benzene rings is 86.62 (13)°. The crystal structure is stabilized by intermolecular N -H⋯S hydrogen bonds, which form centrosymmetric dimers arranged along the c axis.