2,610 research outputs found
Air-cooled heat exchanger design using successive quadratic programming (SQP)
A nonlinear optimization algorithm is applied to the design of air-cooled heat exchangers. In such equipment, the cold fluid (air) is impelled across banks of finned tubes by means of fans in forced or induced draft. The hot stream flows inside the tubes in one or more passes, and the process that takes place may be cooling of either a gas or a liquid, or condensation of either a pure vapor or a mixture. The objective function is the minimum cost of the unit (investment and operation), subject to certain geometric and thermohydraulic constraints. The optimization algorithm used is that developed by Biegler and Cuthrell [1], and programmed by them in the OPT package. The problem posed in this case is made of 10 optimization variables, subject to five constraints related to geometric and operational parameters of the heat exchanger.Fil: Gonzalez, Maria Teresa. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Planta Piloto de IngenierĂa QuĂmica. Universidad Nacional del Sur. Planta Piloto de IngenierĂa QuĂmica; ArgentinaFil: Petracci, Noemi Cristina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Planta Piloto de IngenierĂa QuĂmica. Universidad Nacional del Sur. Planta Piloto de IngenierĂa QuĂmica; ArgentinaFil: Urbicain, Martin Juan. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Planta Piloto de IngenierĂa QuĂmica. Universidad Nacional del Sur. Planta Piloto de IngenierĂa QuĂmica; Argentin
Image fusion performed with noncontrast computed tomography scans during endovascular aneurysm repair
We report two endovascular aneurysm repair procedures achieved under image fusion guidance accomplished with noncontrast injected preoperative computed tomography scans. Such use of this advanced imaging application reduces contrast media injection volume (respectively, 27 and 24 mL throughout the patients' hospital course). No changes in creatinine clearance occurred after the procedures. Contrast-enhanced ultrasound imaging confirmed technical success in both cases
Urea-based fertilization strategies to reduce yield-scaled N oxides and enhance bread-making quality in a rainfed Mediterranean wheat crop
Criptococosis pulmonar que simula un cĂĄncer de pulmĂłn
Cryptococcosis; Pulmonary malignancyCriptococcosi; CĂ ncer de pulmĂłCriptococosis; CĂĄncer de pulmĂł
Satisfaction with Orthopedic Treatments
To determine the effectiveness and satisfaction with orthopodologic treatments in users of the University Clinic of podiatry at the University of A Coruña, according to various parameters. After approval from the ethics committee of the University of A Coruña, an observational retrospective study (n = 125). We analyzed the effectiveness and satisfaction with the orthopodologic treatments depending on the reason for consultation, diagnosis, treatment and goals of treatment. We performed a descriptive analysis of all variables collected. The most frequent reason for consultation was for pain of the hindfoot (58.2%).The most frequent diagnosis was plantar fasciitis, followed by metatarsalgia (29.7% vs. 18.6%). The orthotic treatment corrective was the most used (68.5%) with pronation control (52.3%). The majority of patients reported improvement in pain, and a high degree of satisfaction with the treatment used. The profile of the patient who consults the Podiatry clinic for a orthopodologic treatment is that of a man over the age of 50, who consulted for pain of the hindfoot. The most frequent diagnosis is plantar fasciitis and the treatment carried out the corrective for pronation control. The majority of patients used the brace between 4 and 8 hours a day, with a high satisfaction with the treatment and improvement in the evolution of the pain. The degree of satisfaction was significantly associated with age, younger patients more satisfied. The improvement of pain was significantly associated with age, younger patients who show improvement
Metallofluorescent Nanoparticles for Multimodal Applications
Herein, we describe
the synthesis and application of cross-linked
polystyrene-based dual-function nano- and microparticles containing
both fluorescent tags and metals. Despite containing a single dye,
these particles exhibit a characteristic dual-band fluorescence emission.
Moreover, these particles can be combined with different metal ions
to obtain hybrid metallofluorescent particles. We demonstrate that
these particles are easily nanofected into living cells, allowing
them to be used for effective fingerprinting in multimodal fluorescence-based
and mass spectrometry-based flow cytometry experiments. Likewise,
the in situ reductions of the metal ions enable other potential uses
of the particles as heterogeneous catalysts
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Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
Observations of the anomalous Hall effect in RuO2 and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermagnets. While in MnTe, the unconventional anomalous Hall signal accompanied by a vanishing magnetization is observable at remanence, the anomalous Hall effect in RuO2 is excluded by symmetry for the NĂ©el vector pointing along the zero-field [001] easy-axis. Guided by a symmetry analysis and ab initio calculations, a field-induced reorientation of the NĂ©el vector from the easy-axis toward the [110] hard-axis was used to demonstrate the anomalous Hall signal in this altermagnet. We confirm the existence of an anomalous Hall effect in our RuO2 thin-film samples, whose set of magnetic and magneto-transport characteristics is consistent with the earlier report. By performing our measurements at extreme magnetic fields up to 68 T, we reach saturation of the anomalous Hall signal at a field Hc â 55 T that was inaccessible in earlier studies but is consistent with the expected NĂ©el-vector reorientation field
Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
Observations of the anomalous Hall effect in RuO and MnTe have
demonstrated unconventional time-reversal symmetry breaking in the electronic
structure of a recently identified new class of compensated collinear magnets,
dubbed altermagnets. While in MnTe the unconventional anomalous Hall signal
accompanied by a vanishing magnetization is observable at remanence, the
anomalous Hall effect in RuO is excluded by symmetry for the N\'eel vector
pointing along the zero-field [001] easy-axis. Guided by a symmetry analysis
and ab initio calculations, a field-induced reorientation of the N\'eel vector
from the easy-axis towards the [110] hard-axis was used to demonstrate the
anomalous Hall signal in this altermagnet. We confirm the existence of an
anomalous Hall effect in our RuO thin-film samples whose set of magnetic
and magneto-transport characteristics is consistent with the earlier report. By
performing our measurements at extreme magnetic fields up to 68 T, we reach
saturation of the anomalous Hall signal at a field 55 T that
was inaccessible in earlier studies, but is consistent with the expected
N\'eel-vector reorientation field.Comment: 4 figure
Loss of humoral response 3 months after SARS-CoV-2 vaccination in the CKD spectrum:the multicentric SENCOVAC study
A pan-cancer clinical platform to predict immunotherapy outcomes and prioritize immuno-oncology combinations in early-phase trials
Immunooncology; Predictive biomarkers; Tumor microenvironmentInmunooncologĂa; Biomarcadores predictivos; Microambiente tumoralImmunooncologia; Biomarcadors predictius; Microambient tumoralBackground
Immunotherapy is effective, but current biomarkers for patient selection have proven modest sensitivity. Here, we developed VIGex, an optimized gene signature based on the expression level of 12 genes involved in immune response with RNA sequencing.
Methods
We implemented VIGex using the nCounter platform (Nanostring) on a large clinical cohort encompassing 909 tumor samples across 45 tumor types. VIGex was developed as a continuous variable, with cutoffs selected to detect three main categories (hot, intermediate-cold and cold) based on the different inflammatory status of the tumor microenvironment.
Findings
Hot tumors had the highest VIGex scores and exhibited an increased abundance of tumor-infiltrating lymphocytes as compared with the intermediate-cold and cold. VIGex scores varied depending on tumor origin and anatomic site of metastases, with liver metastases showing an immunosuppressive tumor microenvironment. The predictive power of VIGex-Hot was observed in a cohort of 98 refractory solid tumor from patients treated in early-phase immunotherapy trials and its clinical performance was confirmed through an extensive metanalysis across 13 clinically annotated gene expression datasets from 877 patients treated with immunotherapy agents. Last, we generated a pan-cancer biomarker platform that integrates VIGex categories with the expression levels of immunotherapy targets under development in early-phase clinical trials.
Conclusions
Our results support the clinical utility of VIGex as a tool to aid clinicians for patient selection and personalized immunotherapy interventions.A.H.C. would like to acknowledge fellowship funding from the Spanish Society of Medical Oncology (SEOM), CRIS Contra el Cancer and Hold'em For Life Oncology Fellowship. This research has been funded by the Comprehensive Program of Cancer Immunotherapy & Immunology II (CAIMI-II) supported by the BBVA Foundation (grant 53/2021) and the 2020â2021 Division of Medical Oncology and Hematology (DMOH) Fellowship award at Princess Margaret Cancer Centre. VHIO would like to acknowledge the Cellex Foundation for providing research facilities and equipment and the CERCA Programme from the Generalitat de Catalunya for their support of this research. Authors from VHIO acknowledge the State Agency for Research (Agencia Estatal de InvestigaciĂłn) for providing financial support as a Center of Excellence Severo Ochoa (CEX2020-001024-S/AEI/10.13039/501100011033). A.V. was the recipient of a project award from the FAECC (AVP/18/AECC/3219) and received funding from the Advanced Molecular Diagnostic (DIAMAV) program from the FERO Foundation. Graphical abstract was created with BioRender.com. Diagram in Figure 3B was created with SankeyMATIC (sankeymatic.com)
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