The MAPS foil Beolé, S.; Carnesecchi, F.; Contin, G. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2023, Volume:
1046, Issue:
C
Journal Article
Peer reviewed
Open access
We present a method of embedding a Monolithic Active Pixel Sensor (MAPS) into a flexible printed circuit board (FPC) and its interconnection by means of through-hole copper plating. The resulting ...assembly, baptised “MAPS foil”, is a flexible, light, protected, and fully integrated detector module. By using widely available printed circuit board manufacturing techniques, the production of these devices can be scaled easily in size and volume, making it a compelling candidate for future large-scale applications.
A first series of prototypes that embed the ALPIDE chip has been produced, functionally tested, and shown to be working.
The MAPS foil Beolé, S; Carnesecchi, F; Contin, G ...
arXiv.org,
10/2022
Paper, Journal Article
Open access
We present a method of embedding a Monolithic Active Pixel Sensor (MAPS) into a flexible printed circuit board (FPC) and its interconnection by means of through-hole copper plating. The resulting ...assembly, baptised "MAPS foil", is a flexible, light, protected, and fully integrated detector module. By using widely available printed circuit board manufacturing techniques, the production of these devices can be scaled easily in size and volume, making it a compelling candidate for future large-scale applications. A first series of prototypes that embed the ALPIDE chip has been produced, functionally tested, and shown to be working.
·NiFe2O4-rGO have an enhanced signal than those of other prepared nanocomposites.·The sensor shows high sensitivity and selectivity to BPA.·The sensor has excellent anti-interference ability for ...determination of BPA.
In this work, the electrocatalytic activities and the sensing performances of a series of metal ferrites (MFe2O4, M: Ni, Cu, Zn) - reduced graphene oxide (rGO) nanocomposite (MFe2O4-rGO) prepared through a hydrothermal method were examined by using DPV, CV and EIS techniques. The electrochemical results exhibited that NiFe2O4-rGO nanocomposite modified screen-printed electrode (SPE) has a higher sensing performance towards the oxidation of bisphenol A (BPA) than those of the other ferrite (CuFe2O4, ZnFe2O4)-based SPEs. After optimizing crucial parameters such as accumulation time, accumulation potential and electrolyte pH, the DPV responses of NiFe2O4-rGO/SPE increased linearly with BPA concentration in the range of 0.05 μM to 25 μM (R2 = 0.9976) with a low detection limit of 10 nM and a high sensitivity of 0.6132 μA μM−1. The specificity of the fabricated sensor towards BPA was assessed by analyzing the interference effect of some inorganic salt ions and phenol derivatives. In addition, the sensor prepared to detect BPA in the water bottle sample using only a few drops of the real sample diluted with 0.1 M phosphate buffer solution gave satisfactory responses.
The evaporation from a micropillar evaporator is a problem governed by various interfacial phenomena such as the capillarity-induced liquid flow, thin-film evaporation intensifying near the contact ...lines, and thermocapillarity-induced Marangoni flow. However, past research has not been able to assess the effect of Marangoni flow due to the missing coupling between cell- and device-level modeling. In this work, we develop a comprehensive model for the evaporation from a micropillar evaporator by coupling the liquid flow with the energy transfer in both liquid and solid domains at both cell- and device-levels. The model is successfully validated with previous experiments. When the Marangoni number is sufficiently high, the model identifies a sharp reduction in the evaporator temperature attributed to the thermocapillary convection creating circulations beneath the liquid–vapor interface, which results in the formation of periodic reverse surface flows on the interface. This temperature drop cannot be identified when thermocapillarity is switched off in the model and the model’s prediction substantially deviates from experimental measurement. Therefore, the current study reveals a hitherto unexplored role of Marangoni flow in the evaporation of water from micropillar evaporators.
•A comprehensive evaporation model is developed for micropillar arrays.•The model accounts for all pertinent physics including Marangoni convection.•Marangoni convection creates periodic reverse flows on the liquid–vapor interface.•The resultant mixing effect enhances the thin film evaporation.
In this study, we propose and investigate the employment of elliptical micropillars as a novel evaporator wick structure to boost the performance of capillarity-driven two-phase heat spreaders ...through high-fidelity numerical modeling that accounts for all pertinent transport mechanisms, including thermocapillary convection. Results reveal that transforming cylindrical micropillars to elliptical ones significantly enhances the overall evaporator performance by improving the hydraulic performance associated with decreased flow resistance and boosted capillary pumping and by improving the thermal performance associated with increased contact (triple) line length. Among the scenarios tested and elliptical aspect ratios swept, it is demonstrated that the heat capacity and heat transfer coefficient can be increased by up to 350% and 52%, respectively. Overall, this study paves the way for the utilization of stretched geometries in the capillary flow direction of pillar-type evaporators by using elliptical micropillars as a demonstrator showcase.
: The effects of preoperative respiratory muscle training (RMT) on postoperative complications in patients with pulmonary resection have recently attracted the attention of researchers. More studies ...are obviously needed to clarify the effects of RMT after pulmonary resection. The aim of this study was to evaluate the effectiveness of intense RMT in addition to chest physiotherapy after pulmonary resection in terms of respiratory muscle strength, exercise capacity, and length of hospital stay rather than postoperative complications.
: Forty subjects undergoing pulmonary resection were included in the study. Subjects were divided into two groups using a simple randomization method. The subjects in the study group (SG;
= 20) received RMT in addition to regular chest physiotherapy in the postoperative period. The subjects in the control group (CG;
= 20) received only regular chest physiotherapy. Respiratory muscle strength (maximal inspiratory and expiratory pressure PI
and PE
) was measured pre-postoperatively and before discharge, and exercise capacity, which was measured by the 6-min walk test (6MWT), was assessed preoperatively and before discharge. The length of hospital stay was also recorded.
: There were no differences between groups in terms of demographic and surgical characteristics. The nonsignificant change of PI
from the preoperative to the discharge value was 65.1 ± 15.5 to 68.2 ± 19.2 cmH
O in SG and 59.2 ± 13.7 to 44.3 ± 14.8 cmH
O in CG (
> 0.05,
> 0.05, respectively). The change of PE
from the preoperative to the discharge value was 80.4 ± 24.9 to 81.5 ± 24.9 cmH
O in SG (nonsignificant) and 85.4 ± 38.2 to 61.3 ± 25.4 cmH
O in CG (
> 0.05,
= 0.002, respectively). There was a significant difference between SG and CG in terms of RMT effect (PI
: 11.05 21.84; 0.25 cmH
O
= 0.045; PE
: 25.23 42.83; 7.62 cmH
O
= 0.006). A significant difference was found in the 6MWT when the mean differences were compared between the groups (85.72 166.15; 5.28 m
= 0.037). The length of hospital stay was significantly shorter in the SG (number of days for SG 9.1 ± 3 and for CG 12.9 ± 4.2
= 0.002).
: The addition of RMT to chest physiotherapy after pulmonary resection can have positive effects on respiratory muscle strength, exercise capacity, and length of hospital stay.
In this work, the electrocatalytic activities and the sensing performances of a series of metal ferrites (MFe2O4, M: Ni, Cu, Zn) - reduced graphene oxide (rGO) nanocomposite (MFe2O4-rGO) prepared ...through a hydrothermal method were examined by using DPV, CV and EIS techniques. The electrochemical results exhibited that NiFe2O4-rGO nanocomposite modified screen-printed electrode (SPE) has a higher sensing performance towards the oxidation of bisphenol A (BPA) than those of the other ferrite (CuFe2O4, ZnFe2O4)-based SPEs. After optimizing crucial parameters such as accumulation time, accumulation potential and electrolyte pH, the DPV responses of NiFe2O4-rGO/SPE increased linearly with BPA concentration in the range of 0.05 μM to 25 μM (R2 = 0.9976) with a low detection limit of 10 nM and a high sensitivity of 0.6132 μA μM−1. The specificity of the fabricated sensor towards BPA was assessed by analyzing the interference effect of some inorganic salt ions and phenol derivatives. In addition, the sensor prepared to detect BPA in the water bottle sample using only a few drops of the real sample diluted with 0.1 M phosphate buffer solution gave satisfactory responses.
