Permittivity measurement of high-frequency substrate based on the double-sided parallel-strip line resonator method.

With the development of 5G technology, the accurate measurement of the complex permittivity of a printed circuit board (PCB) in the wide frequency range is crucial for the design of high-frequency circuits. In this paper, a microwave measurement device and method based on the double-sided parallel-strip line (DSPSL) resonator have been developed to measure the complex permittivity of typical PCBs in the vertical direction. The device includes the DSPSL resonator, the DSPSL coupling probe, a pressure monitor, a Farran C4209 vector network analyzer (100 K to 9 GHz), and a FEV-10-PR-0006 frequency multiplier (75-110 GHz).

Test technique for arbitrary length high dielectric sheet materials based on perturbation method.

In this article, a very effective method is proposed to measure the permittivity of sheet materials with a high dielectric constant and loss. To meet the constraints of the perturbation method, controlling the magnitude of the perturbation by reducing the sample size is necessary. However, this will cause significant changes in the polarization field within the sample and, consequently, affects the accuracy of the calculations.

Role of interleukins in the detection of neonatal sepsis: a network meta-analysis.

Objectives: The purpose of the network meta-analysis was to make a more comprehensive comparison of different interleukins in the detection of neonatal sepsis and to pose clues in the field of clinical practice.

Methods: Electronic databases of PubMed, Web of Science and Embase were systematically searched. Eligible studies included diagnostic tests utilizing interleukins to detect neonatal sepsis.

Clinical Application of Thromboelastography in Patients With Severe Fever With Thrombocytopenia Syndrome.

Aim: To investigate the clinical application of thromboelastography (TEG) in severe fever with thrombocytopenia syndrome (SFTS).

Methods: One hundred and fifty-seven patients with SFTS were included in the study. The participants were distributed into 3 groups; A, B, and C.

Experimental study of the dielectric properties of energy-containing materials at variable temperatures.

Due to the inherent material characteristics of fireworks and negligent safety management, safety accidents have occurred in recent years, resulting in significant personal and property losses. Therefore, the status inspection of fireworks and other energy-containing materials is a hot issue in the field of energy-containing materials production, storage, transportation, and application. The dielectric constant is a parameter used to characterize the interaction between materials and electromagnetic waves.

Measurement of complex permittivity of liquids in the frequency range 100-1000 MHz by using a re-entrant cavity.

For many liquid materials and biological media, their complex permittivity varies with frequency in the P-band (100-1000 MHz). In this paper, a re-entrant coaxial cavity resonance test system with intensive multi-frequency points testing capability is designed for the P-band to realize the test of the complex permittivity of P-band materials. For this system, a test algorithm has been written, and on the basis of this system, a perturbation block has been designed, using stepper motors to control the up and down movement of the perturbation block to achieve frequency tunability of the cavity, enabling more P-band frequency test data to be obtained.

Permittivity measurement of the substrate by using the corrected differential phase method and quick-press test fixture.

Permittivity is critical for analyzing electromagnetic propagation in the substrate. The differential phase method is desirable to measure the permittivity of the substrate. The actual measurement is usually required to be started at a low frequency to avoid the S-phase ambiguity problem.

Clinical Evaluation and Test of a Modified Lp-PLA2 Kit in Diagnosing Atherosclerosis.

Background: Lipoprotein-associated phospholipase A2 (Lp-PLA2) has been identified as an inflammatory marker tightly correlated with the onset of atherosclerosis. Although several methodologies have been developed to detect Lp-PLA2, including enzyme-linked immunosorbent assay, Lp-PLA2 detection is still time- and resource-consuming with poor antiinterference ability and low sensitivity. Thus, it is urgent to explore new methodology for Lp-PLA2 detection.

A procedure and device for determining complex material permittivity using the free-space resonance method.

The essential technologies of the complex permittivity of microwave dielectric materials are systematically designed, and the complex permittivity of materials is tested nondestructively by the free-space resonance method. A testing system was built by using a mobile surveying platform, and the complex dielectric constant of the material in the X band was nondestructively tested by using the algorithm of variable physical cavity length and constant physical cavity length. Focusing on the impact of variable physical cavity length on the test results, the cavity calibration technology is proposed to reduce the influence on the complex dielectric constant test of materials.

Activation of integrated stress response and disordered iron homeostasis upon combined exposure to cadmium and PCB77.

Both cadmium and polychlorinated biphenyls (PCBs) can induce diverse detrimental effects on human health. Though these compounds co-exist in various environmental contexts and in the human body, studies on their joint toxicities are limited. Activation of the integrated stress response (ISR) and iron homeostasis are crucial for erythropoiesis.

Analysis of thrombelastogram-guided medication in patients with coronary heart disease after percutaneous coronary intervention.

Effects of thrombelastogram-guided (TEG-guided) clopidogrel and aspirin on major adverse cardiovascular events (MACE) after percutaneous coronary intervention (PCI) were investigated. A retrospective analysis was performed on 203 patients undergoing PCI interventional therapy in the Cardiovascular Medicine of Weihai Central Hospital from February 2015 to September 2016. The patients were treated with clopidogrel and aspirin for anti-thrombus therapy.

RNA Expression Was an Independent Unfavorable Prognostic Indicator in Lung Adenocarcinoma, but Not in Lung Squamous Cell Carcinoma.

In this study, we investigated the potential prognostic value of ubiquitin-conjugating enzyme E2D1 () RNA expression in different histological subtypes of non-small-cell lung cancer (NSCLC). A retrospective study was performed by using molecular, clinicopathological, and survival data in the Cancer Genome Atlas (TCGA)-Lung Cancer. Results showed that both lung adenocarcinoma (LUAD) ( = 514) and lung squamous cell carcinoma (LUSC) ( = 502) tissues had significantly elevated RNA expression compared to the normal tissues ( < 0.

Novel ultra-wideband test fixture and method for attenuation of the attenuator-coated dielectric support rod in a helical slow-wave structure.

In order to measure the attenuation along the dielectric support rod in a helical slow-wave structure, a new test fixture and the corresponding test method are introduced. The proposed fixture is a transmission line that consists of three parts: angle gradient transitions, hyperbolical tapered lines, and parallel strips with a sample hole in the middle. The hyperbolical tapered lines on the top and bottom sides of the substrate were designed to realize an approximate Klopfenstein tapered line.

LDHA upregulation independently predicts poor survival in lung adenocarcinoma, but not in lung squamous cell carcinoma.

Aim: To investigate the potential prognostic value of LDHA in lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC).

Patients & Methods: Molecular, clinicopathological and survival data in Cancer Genome Atlas-Lung Cancer were obtained for secondary analysis.

Results: LDHA expression was significantly upregulated in both LUAD and LUSC compared with normal lung tissues.

A broadband variable-temperature test system for complex permittivity measurements of solid and powder materials.

A microwave test system to measure the complex permittivity of solid and powder materials as a function of temperature has been developed. The system is based on a TM multi-mode cylindrical cavity with a slotting structure, which provides purer test modes compared to a traditional cavity. To ensure the safety, effectiveness, and longevity, heating and testing are carried out separately and the sample can move between two functional areas through an Alundum tube.

STAT3 activation is required for interleukin-6 induced transformation in tumor-promotion sensitive mouse skin epithelial cells.

STAT3, a member of signal transducers and activators of transcription (STATs) originally discovered as mediators in cytokine signaling pathways, plays an active role in oncogenesis. However, the function of STAT3 in signaling multistage carcinogenesis, especially in transformation of tumor-promotion sensitive epithelial cells has not been elucidated. The present study demonstrates that STAT3 is activated in interleukin-6 induced transformation in mouse skin epithelial cells.