Potential Sources Of Interference Research Articles

Carbon-based brilliance: a novel approach to renewable energy in radiotherapy centers.

The energy produced from other sources which does neither come from fossil fuels nor contribute in the production of any greenhouse effects that causes climate changes is called as 'Alternative Energy'. Since our world's primary energy sources such as coal, oil and natural gases are exploited to a greater extent, we are in an urge to switch to an alternative energy. Scattered radiation, a common byproduct in radiation therapy and diagnostic radiology, presents a unique opportunity in the realm of alternative energy. As a potential source of interference, scattered radiation can be repurposed to contribute to sustainable energy solutions. Addressing the issue of scattered radiation wastage and utilizing it for alternative energy, an activated carbon-based solar cell emerges as a solution. This solar cell, a conventional one in which cadmium Telluride is replaced by coconut shell based carbon material, has the potential in producing a significant amount of electrical energy by utilizing scattered radiation from radiotherapy and radiology machines. Furthermore, this activated carbon based-material undergoes thorough characterization into various teletherapy and radiology machines, and it can be seamlessly integrated into clinical practices.

A Novel Flying Robot Swarm Formation Technique Based on Adaptive Wireless Communication using MUSIC Algorithm

This paper presents a novel technique to address the challenge of coordinating swarm flying robots in a leader-follower configuration. A combination of the Multi Signal Classification (MUSIC) estimation algorithm, based on a wireless MIMO array antenna, along with onboard robot control are used for precise route tracking of an individual robot. Employing an array antenna reduces energy consumption for followers in passive mode and reduces computational complexity when measuring the angles of leader angle interferences, which depends on the phase difference of the impinging signal on the antenna elements of the array. Additionally, the angles estimation and beamforming processes, utilizing MUSIC algorithm, form an inner loop that furnishes orientation angles in 3D (Azimuth and elevation angles) for both the leader and potential interference sources. The outer loop, contingent on the onboard controller and the robot's GPS system, enabling fine adjustments in angle and position relative to the leader's location. The simulation results illustrated the efficiency of the proposed technique in estimating the orientation angles of the leader and the interference sources. The technique robustness is confirmed through testing the performance on different trajectories. Where the follower perfectly generates a main radiation beam directed towards the leader, effectively mitigates interference signals from neighboring group leaders, and successfully tracks the leader path.

Dimethyl Sulfoxide (DMSO) as a Potential Source of Interference in Research Related to Sulfur Metabolism-A Preliminary Study.

Dimethyl sulfoxide (DMSO), an organosulfur compound, is widely used as the gold standard solvent in biological research. It is used in cell culture experiments and as a component of formulations in in vivo studies. Unfortunately, parameters related to sulfur metabolism are often not taken into account when using DMSO. Therefore, in this work we aim to show that the addition of DMSO to the culture medium (even in amounts commonly considered acceptable) alters some parameters of sulfur metabolism. For this study, we used three cell lines: a commercially available Caco-2 line (HTB-37, ATCC) and two lines created as part of our early studies (likewise previously described in the literature) to investigate the anomalies of sulfur metabolism in mucopolysaccharidosis. As the negative effects of DMSO on the cell membrane are well known, additional experiments with the partial loading of DMSO into polymerosomes (poly(ethylene glycol) methyl ether-block-poly(lactide-co-glycolide), PEG-PLGA) were performed to eliminate these potentially disruptive effects. The results show that DMSO is a source of interference in studies related to sulfur metabolism and that there are not just simple effects that can be corrected in the final result by subtracting control values, since complex synergisms are also observed.

HYPHOP: a tool for high-altitude, long-range monitoring of hydrogen peroxide and higher organic peroxides in the atmosphere

Abstract. Measurements of hydroperoxides help improve our understanding of atmospheric oxidation processes. Here, we introduce an instrument setup designed for airborne hydroperoxide measurements. The HYdrogen Peroxide and Higher Organic Peroxides (HYPHOP) monitor has been deployed on the German High-Altitude and Long-range Observatory (HALO) aircraft and is based on dual-enzyme fluorescence spectroscopy, enabling measurements up to an ambient pressure of approximately 150 hPa pressure altitude (13.5–14 km). We characterized the measurement method and data acquisition of HYPHOP with special emphasis on potential sources of interference impacting instrument uncertainty. Physically derived interference was examined based on a dedicated test flight to investigate potential measurement inconsistencies arising from the dynamic movement patterns of the aircraft. During the test flight, the hydroperoxide monitor was operated in the background air sampling mode with purified air by scrubbing atmospheric trace gases, to investigate the instrument stability and potential parameters that might affect the measurements. We show that technical and physical challenges during flight maneuvers do not critically impact the instrument performance and the absolute measurements of hydroperoxide levels. Dynamic processes such as convective transport in the South Atlantic Convergence Zone (SACZ) are well-resolved as shown in the overview of a recent measurement campaign, Chemistry of the Atmosphere: Field Experiment in Brazil, in December 2022–January 2023 (CAFE-Brazil). The instrument precision based on the measurement results during CAFE-Brazil for hydrogen peroxide and the sum of organic hydroperoxides is estimated to be 6.4 % (at 5.7 ppbv) and 3.6 % (at 5.8 ppbv), respectively, and the corresponding detection limits 20 and 19 pptv for a data acquisition frequency of 1 Hz. The determined instrumental temporal resolution is given at approximately 120 s.

Time Slotted Multiple-Hypothesis Interference Tracking in Wireless Networks

Nowadays Internet of Things and Industry 4.0 devices are often connected wirelessly. Current wireless sensor network (WSN) deployments are relying in most cases on the industrial, scientific, and medical (ISM) bands without centralized resource scheduling. Thus, each device is a potential source of interference to other devices, both within its own WSN but also to devices in other collocated WSNs. If the transmission behavior of devices from other WSNs is not random, we are able to find patterns in the time domain in their channel access. This is, for example, possible for periodic channel access, which is quite common for WSNs with demanding low-power and reliability requirements. The main goal of this work is to detect multiple sources of periodic interference in time slotted signal-level measurements and estimate the time windows of future transmissions. This gives a WSN a certain understanding of the radio surrounding and can be used to adapt the transmission behavior to thus avoid collisions. For this, the multihypothesis tracking algorithm is adapted and used together with timeslot-based interference measurements on low-cost sensor nodes. The applicability of the algorithm is shown with extensive simulations and the performance is demonstrated with measurements on a time-division multiple access-based WSN built upon the Bluetooth low-energy physical layer.

The locus of visual search's interference on visual working memory.

Visual attention and visual working memory (VWM) are interacting systems. Most research has been directed toward how a retained VWM load can influence visual search behavior. However, the relationship between the two is bidirectional. When performing a visual search while maintaining a VWM load, decreases in change detection accuracy are often seen. Woodman and Luck (2010) argued that this interference was due to the onset of the search display leading to disruption. The current work attempts to identify the exact component of visual search that leads to interference with VWM. Potentially interference could be due to an attentional component of the task or a procedural artifact of the dual-task paradigm. Over five experiments, different attentional tasks were completed in the retention period of a difficult change detection task. Memory interference was measured as accuracy decrements in these conditions compared to trials where no attentional task was completed. Over the five experiments, one factor was highlighted as a sufficient cause for interference: the addition of nontarget items in the attentional task. Procedural artifacts were ruled out as potential sources of interference including: response bindings, eye movements, nontarget variance, spatial shifts of attention, perceptual load, and the time it took to complete the attentional task. It is proposed that interference arises from the attentional selective process of choosing the target item out of the nontargets. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

The potential and practice of arboreal camera trapping

Abstract Arboreal camera trapping is a burgeoning method providing a novel and effective technique to answer research questions across a variety of ecosystems, and it has the capacity to improve our understanding of a wide range of taxa. However, while terrestrial camera trapping has received much attention, there is little guidance for dealing with the unique challenges of working in the arboreal realm. Our review draws on the expertise of researchers from six continents and the broader literature to investigate the advantages and disadvantages of arboreal camera trapping, and challenges to consider when using this technology. We also include mini‐guides with detailed information on the current arboreal camera trap literature, mounts used to install arboreal cameras, tree climbing pointers and safety tips, methods for deploying cameras without climbing, and tips for managing interference with camera function. We find that arboreal camera traps have been most commonly used in the study of mammals in forests; however, there is potential for this method to be applied to a broad range of habitats including urban areas, and taxa such as birds, amphibians, invertebrates, and plants. Methods in arboreal camera trapping could be improved by developing a greater understanding of the factors affecting detection of species. The most common challenges of arboreal camera trapping are camera placement and camera site access. These can be overcome by understanding correct camera orientation, managing potential sources of interference in front of cameras, utilizing appropriate cameras mounts and training researchers properly. Given the benefits and opportunities presented by arboreal camera trapping, it is likely to become an ever‐more popular method of studying arboreal species and systems. The information synthesized in this review provides guidance for future studies to help direct more reliable and robust ecological inferences from arboreal camera trapping.

Modeling Syntactic Change under Contact: The Case of Italiot Greek

In this paper, we investigate patterns of persistence and change affecting the syntax of nominal structures in Italiot Greek in comparison to Modern (and Ancient) Greek, and we explore the role of Southern Italo-Romance as a potential source of interference. Our aim is to highlight the dynamics that favor syntactic contact in this domain: we provide an overview of the social context where these dynamics have taken place and of the linguistic structures involved.

Estimation of Radiated Emissions From PV System Through Black Box Approach

The radiated emissions from a photovoltaic (PV) system can be potential interference sources to nearby electronic devices. This article proposes a novel black box approach to estimate the radiated emissions in the frequency range of 150 kHz–30 MHz. By extracting the power converter as a “radio frequency (RF) noise source black box” and characterizing the PV panel with its connecting dc cable as a “radiation black box,” the radiated emissions from any PV system can be easily estimated without prior knowledge of the internal details of the PV panel and the power converter. Using a commercially available PV system as a test case, the validity of the proposed approach for the radiated emissions estimation in the frequency range of interest has been verified experimentally.

Supporting I/O and IPC via fine-grained OS isolation for mixed-criticality real-time tasks

Efforts towards hosting safety-critical, real-time applications on multicore platforms have been stymied by a problem dubbed the “one-out-of-m” problem: due to excessive analysis pessimism, the overall capacity of an m-core platform can easily be reduced to roughly just one core. The predominant approach for addressing this problem introduces hardware-isolation techniques that ameliorate contention experienced by tasks when accessing shared hardware components, such as DRAM memory or caches. Unfortunately, in work on such techniques, the operating system (OS), which is a key source of potential interference, has been largely ignored. Most real-time OSs do facilitate the use of a coarse-grained partitioning strategy to separate the OS from user-level tasks. However, such a strategy by itself fails to address any data sharing between the OS and tasks, such as when OS services are required for interprocess communication (IPC) or I/O. This paper presents techniques for lessening the impacts of such sharing, specifically in the context of $${\textsf {MC}}^{\textsf {2}}$$ , a hardware-isolation framework designed for mixed-criticality systems. Additionally, it presents the results from micro-benchmark experiments and a large-scale schedulability study conducted to evaluate the efficacy of the proposed techniques and also to elucidate sharing vs. isolation tradeoffs involving the OS. This is the first paper to systematically consider such tradeoffs and consequent impacts of OS-induced sharing on the one-out-of-m problem.

Potential sources of interference with the highly sensitive detection and quantification of alpha-synuclein seeds by qRT-QuIC.

Parkinson’s disease (PD) is a progressive neurodegenerative disease which is histologically characterized by loss of dopaminergic neurons in the substantia nigra and deposition of aggregated alpha‐synuclein (aSyn) in the brain. The detection of aSyn in well accessible fluids has been one of the central approaches in the development of biomarkers for PD. Recently, real‐time quaking‐induced conversion (RT‐QuIC) has been successfully adapted for use with aSyn seeds. Here, we systematically analysed parameters potentially impacting the reliability of this assay by using quantitative real‐time quaking‐induced conversion (qRT‐QuIC) with in vitro‐formed aSyn seeds. Seeds diluted in cerebrospinal fluid (CSF) accelerated the seeding reaction and slightly increased the sensitivity without affecting specificity. Repeated freeze–thaw cycles decreased the apparent lag times of seeds diluted in ddH2O but did not alter the seeding activity of seeds diluted in CSF. High levels of artificial contamination with blood resulted in prolonged apparent lag times, while sensitivity and specificity were unaffected. Altogether, qRT‐QuIC with aSyn seems to be robust concerning sensitivity and specificity in our model system, but quantitative interpretation might be limited under certain conditions.

418 A Review of Timelines and Reporters of Adverse Events From Proton Pump Inhibitors (PPIs) That Are Conveyed to the United States Food and Drug Administration Adverse Event Reporting System (FAERS).

INTRODUCTION: Recent publications have described potential PPI-associated adverse events (AEs) including cardiovascular disease (CVD), cerebrovascular accidents (CVA) and renal disease (acute interstitial nephritis and CKD). There is public interest and potential for lawsuits for these and other PPI-related AEs. The FAERS is a database of voluntarily reported AEs used for post-marketing surveillance of medications. The aim of this study is to analyze reports of all PPI-associated-AEs to FAERS, focusing on reporter sources. This permits an understanding of the effect of published high-profile PPI-associated AEs on FDA drug surveillance. METHODS: A total of 9,144,290 FAERS reports from January 2013 to December 2018 were examined. Analysis of all Primary PPI-related AEs were included (C. difficile, microscopic colitis, atrophic gastritis, hypergastrinemia, hypomagnesemia, hypocalcemia, hypokalemia, hypophosphatemia, vitamin malabsorption, pneumonia, CVD, CVA, renal disease, drug-induced lupus, and dementia). AEs were defined by MedDRA terminology. All reports were categorized according to reporter source (physicians, pharmacists, other health care professionals, consumers, and lawyers). RESULTS: Until 2018, overall reporting of PPI-related AEs generally showed steady changes over time. In 2015 there were 7,024 reports for all PPI-related AEs, in 2016, there were 8,043, and in 2017, there were 7,682. Notably, in 2018, reports for all PPI-related AEs spiked to 14,607. For specific AEs, reports for renal disease and CVD from consumers showed marked increases. In 2015 consumers reported 427 CVD cases and 494 renal cases, while consumers reported 627 CVD cases and 1,155 renal cases in 2018 (Figure 1). Reports for lawyers and physicians for CVD and renal disease both increased between 2015 and 2018. Physicians had an increase from 368 to 503 cases of CVD (36.7% increase) and from 676 cases to 1,112 of renal disease (64.5% increase), while lawyers had an increase of 49 cases of CVD to 99 cases of CVD (102% increase) and increase of 4 cases to 974 of renal disease (24,250% increase). This resulted in a rise in percentage of total reports from lawyers (Figures 2 and 3). CONCLUSION: Consumers are increasing reporting of CVD and renal disease associated with PPI use. The rapid increase in reports of PPI-associated CVD and especially renal disease by lawyers suggests that lawyers are a potential source of interference on pharmacovigilance.

Electrodermal activity in relation to diabetes, autonomic neuropathy and aging: a preliminary study

A reduced electrodermal activity (EDA) may be related to autonomic neuropathy (AN). The aims of this study were to independently study the characteristics of the EDA and its correlation with diabetes and AN. During a selfdesigned test, mean skin conductance level (MSCL), mean skin conductance response (MSCR) to stimuli, and difference in MSCL between feet (DBF) were obtained through a modelbased decomposition based on Bayesian statistics and mathematical convex optimization. A group of 22 subjects were included for the final test. Diabetic patients were stratified based on their clinical history and care habits, dividing them into those out of risk and those at risk of developing AN. Statistical difference was found for the latter regarding MSCR (p < 0,01) and DBF (p < 0,05) with respect to the control group. While past research failed to address potential sources of interference with the EDA measurement, namely emotional state, degree of concentration on the task, and body posture, this study proposes a welldefined protocol to stimulate subjects and acquire proper and reliable EDA data.

Social Connections (Guanxi) and Judicial Decision-making in China

Political control is not the only potential source of interference with judicial independence and impartiality. As the stakeholders in cases, litigants have perhaps the most significant incentive to influence the outcome of judges' decision-making. Based on introducing the concept in Chinese society of interpersonal relationships known as guanxi into a discussion of the nature of judicial power, this article examines a report released by the Caijing magazine about 200 corrupt judges convicted between 1995 and 2013 and argues that in China's society with guanxi embedded as its cultural roots, social pressure from relatives, friends and acquaintances of judges is a major source of external interference in judicial decision-making.

GNSS interference reduction method for CORS site planning

Precision, Navigation, and Timing (PNT) system based on Global Navigation Satellite System (GNSS) becomes significant in the air, land, and sea traffic management. Integrity of GNSS is significant to provide a reliable real time PNT system such as CORS (Continuously Operating Reference Stations). GNSS Interference due to intentional or unintentional surrounding signal source may decrease the integrity of GNSS signal. Monitoring and identification of potential GNSS interference sources in the surrounding environment of CORS is significant. This paper proposed a methodology to reduce potential GNSS interference in a planned CORS site by first simulating the radiation pattern of potential source of interference to GNSS signal in the planned CORS sites. Thereafter ambient noise levels in the location of CORS may be measured to provide a reference point for analyzing the other potential sources of interferences. Based on these results, optimal location of CORS is chosen with the lowest possible unintentional interference signal from their surrounding. Measurement has been conducted in the location of CORS owned by BIG (Indonesian Agency for Geospatial Information), which is located in the rooftop of a building neara telecommunication tower.This method is necessary for CORS site planning to reduce potential GNSS interference sources in the environment of alternative sites.

Left Ventricular Assist Device Artifact in EEG

ABSTRACTLeft ventricular assist devices are increasingly used as therapy for patients with severe congestive heart failure. These patients typically receive care in the intensive care unit when EEG monitoring is necessary. Identification of artifacts created by these devices is important for accurate EEG diagnosis, thus avoiding unnecessary therapies that may result in complications or require intubation of the patient. This report describes a case of a patient with altered mental status and history of congestive heart failure with a left ventricular assist device who developed seizures following left subdural hematoma and emergent evacuation. While being treated for seizures, the EEG showed a diffuse continuous and regular delta, predominant on the left that mirrored the electrocardiogram (EKG) rhythm strip and appeared to indicate an external artifact. Moving the amplifier farther away from the heart and repositioning the patient resolved the artifact. It is important to recognize potential sources of interference and artifacts when these devices are involved. This case illustrates how clinicians can prevent administration of unneeded therapies to these patients.

Hypothesis Test-based Detection of Wi-Fi Interference on NavIC/IRNSS S-band Signal

The Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite System (IRNSS) is an emerging satellite navigation system that provides an independent navigation system for positioning and timing services in India and up to 1,500 km from its borderline. The dual frequency NavIC system uses the L5 frequency and S-band for navigation. These navigation signals are extremely weak and susceptible to interference when they are received on Earth's surface. Moreover, the performance of these bands may be degraded by other band or out-of-band communication systems, which can become the major threat to the performance of a NavIC receiver. The main focus of this paper is to detect real-time interference of Wi-Fi signals in the S-band of the NavIC receiver. The results are prepared with respect to the Power Spectral Density (PSD), execution of acquisition stage and the detection of Wi-Fi interference with two sample hypothesis testing methods including the Kolmogorov-Smirnov (KS)-test, the t-test and the Variance (var)-test. A performance analysis of the p-value is used to measure the evidence of interference existence for hypothesis testing, decision hypothesis and probability of detection are evaluated for each hypothesis method. The results show the severity of the Wi-Fi signal as a potential source of interference for future NavIC applications.

INAPPROPRIATE ACTIVATION OF PACEMAKER MAGNET MODE BY A CPAP MASK

Consumer and medical devices in the home setting represent a potential source of interference to cardiac implanted electronic devices (CIEDs). While electromagnetic interference is widely recognized as a cause of noise detected by CIEDs, we report on a case of inappropriate activation of magnet

A Spread Spectrum Clock Generator With Nested Modulation Profile for a High-Resolution Display System

A spread-spectrum clock generator is implemented using a nested modulation profile to reduce the peak power levels of radiated electro-magnetic emissions in display products. The display data interface is a potential source of interference, and the spread spectrum technique has been extensively used for display interfaces. The proposed nested profile can further reduce electro-magnetic interference without any degradation in the other characteristics. A test chip was fabricated using a 55-nm CMOS process, and the test results indicate a 41-dB reduction. The sensitivity of a wireless receiver to interference is tested, and the EVM results for the proposed nested profile exhibits an improvement of 1.4 dB compared to those of the triangular profile.

Investigation of the in vitro genotoxicity of two rutile TiO2 nanomaterials in human intestinal and hepatic cells and evaluation of their interference with toxicity assays

TiO2 nanomaterials (NM) have a wide range of industrial applications, including their use in food products. The incorporation of these NMs in consumer products represents a clear concern for public health safety agencies and consumers, and further investigation of the potential impact of these products on human health is necessary. Indeed, since human oral exposure to TiO2 NMs is expected to increase in the years to come, there exist legitimate concerns about the risk assessment of these nanomaterials present in food products. A considerable amount of studies investigating the adverse effects of TiO2 NMs have focused on the genotoxic effects of these NMs, and more recently they have been classified by the International Agency for Research on Cancer (IARC) as carcinogen group 2B following inhalation studies (IARC, 2010). While numerous data are available for anatase or mixes of anatase/rutile forms, the toxicity and the genotoxicity of rutile TiO2 NMs have been rarely investigated. The aim of our study was therefore to investigate the cytotoxic and genotoxic effects of two rutile TiO2 NMs, differing in surface coating, NM103 (hydrophobic) and NM104 (hydrophilic), on intestinal and hepatic cell models. Following 3 or 24 h treatments with concentrations of TiO2 NMs from 1.2 to 80 μg/cm2, we have assessed the genotoxicity of these NMs with γH2AX, alkaline comet assay and micronucleus (MN) assays. Cellular viability and effects on oxidative stress were also evaluated. Although TEM imaging demonstrated the presence of the two TiO2 NMs within the cytoplasm, no significant cytotoxic or genotoxic were observed in either cell model. We have also evaluated and taken into account a variety of potential sources of interference of NMs with cellular assays. TiO2 NMs present in the cytoplasm introduce uncertainty in the scoring of micronuclei, and therefore this assay is not recommended for the evaluation of the genotoxicity of TiO2 NMs, or other NMs demonstrating similar interference. The unique properties of TiO2 NMs introduce additional complexity for genotoxicity testing, and caution must be taken in order to obtain reliable results necessary for accurate hazard assessment.