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A wideband power amplifier (PA), with 88% fractional bandwidth operating in the 700 MHz to 1.8 GHz range, which covers most of the standardized narrowband internet-of-things (NB-IoT) and LTE-M bands, is fully integrated in 22 nm CMOS FDSOI. A single-stage differential amplifier core, combined with an on-chip balun, realizes a single-ended output. A stacked circuit architecture, with 3.3 V LDMOS tr
The rise of 5G technology leads to a boom in the demand for widely available wireless connectivity while requiring telecommunication networks to improve spectral efficiency and deploy dynamic spectrum sharing (DSS) and carrier aggregation (CA). This imposes more stringent intermodulation test scenarios and blocking requirements on RF transceivers. In addition, they are required to be programmable
The tourism sector declared a climate emergency in 2020. It is against this background that this Curated Collection on Climate Change and Tourism is launched. A bibliometric analysis of 1290 articles reviews the 35-year development of climate change and tourism scholarship, including major research themes, key knowledge gaps, and our capacity to deliver the enormous knowledge requirements for an e
BACKGROUND: The same mechanisms by which ultrasound enhances thrombolysis are described in connection with non-beneficial effects of ultrasound. The present safety study was therefore designed to explore effects of beneficial ultrasound characteristics on the infarcted and non-infarcted myocardium. METHODS: In an open chest porcine model (n = 17), myocardial infarction was induced by ligating a co
ABSTRACT:
Protein structure-function relationships can be studied by using linker insertion mutagenesis, which efficiently identifies essential regions in target proteins. Bacteriophage Mu in vitro DNA transposition was used to generate an extensive library of pentapeptide insertion mutants within the alpha-complementing domain 1 of Escherichia coli beta-galactosidase, yielding mutants at 100% efficiency. E
“The implications and applications of biotechnology continue to be at the centre of public debate. In the light of rapid scientific advances and novel insights, the multi-faceted discussions are particularly fierce with regard to patents on DNA–related technology. In the often very emotionally-led debate basically two directly conflicting schools of thoughts can be identified. Some people believe
OBJECTIVE: To investigate changes in atrial conduction induced by MgSO4 and glucose, insulin and potassium (GIK) during the first 12-h period of sinus rhythm after successful DC-conversion of chronic atrial fibrillation (CAF). METHODS: Signal-averaged P-wave duration, QRS-duration and PQ-time were recorded in 20 patients who were randomly assigned to control or intervention. Ten patients received
The literature identifies two forms of business organization, Neocorporatist and firm-level, and the strength of each respective type has changed over time; whereas Neocorporatism has remained steady or declined, firm-level organization has become stronger in all countries. The literature underscores the differential effects of these two forms of business organization on employer support for activ
PURPOSE: To investigate if resting-state functional MRI (fMRI) reliably can serve as a complement to task-based fMRI for presurgical mapping of the sensorimotor cortex. MATERIALS AND METHODS: Functional data were obtained in 10 healthy volunteers using a 3 Tesla MRI system. Each subject performed five bilateral finger tapping experiments interleaved with five resting-state experiments. Following p
he study purpose is to determine whether numeric and/or graphic ST measurements added to the display of the 12-lead electrocardiogram (ECG) would influence cardiologists' decision to provide myocardial reperfusion therapy. Twenty ECGs with borderline ST-segment deviation during elective percutaneous coronary intervention and 10 controls before balloon inflation were included. Only 5 of the 20 ECGs
A large proportion of people with type 2 diabetes (T2D) remain uncontrolled on basal insulin. Yet, there is limited understanding of how people with uncontrolled type 2 diabetes (PWUD) perceive control and insulin intensification and whether their perceptions differ from those of physicians. The purpose of the study was to investigate perceptions of control and views on insulin intensification amo
BACKGROUND: To evaluate resource utilization and direct economic costs of care for patients treated with negative-pressure wound therapy (NPWT), using the Vacuum-Assisted Closure (V.A.C.) system, compared to standard moist wound therapy (MWT). METHODS: A total of 162 diabetic patients with post-amputation wounds (up to the trans-metatarsal level) entered a 16-week, randomized clinical trial. Patie
Peak to average power (PAPR) reduction of OFDM signals is critical in order to improve power amplifier (PA) efficiency in base stations. For massive MIMO, the complexity of these methods can become a real bottleneck in implementing low power digital signal processing chains. In this work, we consider an antenna reservation technique, which uses a low complexity clipping method to reduce signal pea
Reliable information on solar activity over the Holocene period is important to predict the Sun in the future and to understand the mechanism behind the Sun-climate linkage. Presently, there are discrepancies in the proxy data of solar activity due to reasons that are not yet understood. This leads to major uncertainties in Holocene solar reconstructions. This PhD project aims to improve the Holoc
In recent years, since the cloud can provide tremendous advantages regarding storage and computing resources, the industry has been motivated to move industrial control systems to the cloud. However, the cloud also introduces significant security challenges since moving control systems to the cloud can enable attackers to infiltrate the system and establish an attack that can lead to damages and d
This letter presents a radio frequency front-end (RFFE) for 5G new radio (NR) receivers operating in frequency range 1 (FR1). The core of this RFFE is a synthetic fourth-order Q -enhanced RF filter employing gm -boosting, noise-canceling, capacitive cross-coupling, and forward body-biasing techniques to achieve 1.7 to 6.4 GHz operating range and 1% to 40% adjustable fractional bandwidth (FBW). The
We are working towards a mixed reality-based human-robot collaboration interface using gaze and gesture as methods of communicating intent in a search and rescue scenario to optimize the operation. The lack of mature algorithms and control schemes for autonomous systems makes it still difficult for them to operate safely in high-risk environments. We are approaching the problem through symbiosis w
We coordinate interconnected agents where the control input of eachagent is limited by the control input of others. In that sense, the sys-tems have to share a limited resource over a network. Such problems canarise in different areas and it is here motivated by a district heating ex-ample. When the shared resource is insufficient for the combined needof all systems, the resource will have to be s
