bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationships between illness perception, functional status, social support, and self-care behavior among Thai people at high risk of stroke: A cross-sectional study
Authors: Maninet Surachai , Desaravinid Chalermchai
Published: February 2023

Background: People at high risk of stroke reported having difficulty performing self-care behavior. Although the literature has identified various factors related to self-care behavior in this population; however, there is a lack of studies to conclude the associated antecedents of self-care behavior, particularly in Thailand.
Objective: This study aimed to examine the relationships between illness perception, functional status, social support, and self-care behavior among people at high risk of stroke.
Methods: A correlational cross-sectional study design was used. One hundred and seventy people at high risk of stroke were selected from ten health-promoting hospitals in the Northeast region of Thailand using multi-stage sampling. Data were gathered using self-report questionnaires, including the brief illness perception questionnaire, functional status scale, multidimensional scale of perceived social support, and self-care behavior questionnaire, from November 2021 to February 2022. Data were analyzed using mean, standard deviation, and Pearson’s product-moment correlation.
Results: One hundred percent of the participants completed the questionnaires. The participants had a moderate level of self-care behavior (M = 64.54, SD = 7.46). Social support and functional status had medium positive significant correlations with self-care behavior among people at high risk of stroke (r = 0.460 and r = 0.304, p <0.01), respectively. In contrast, illness perception had a small negative significant correlation with self-care behavior among people at high risk of stroke (r = -0.179, p <0.05).
Conclusion: Social support, functional status, and illness perception are essential factors of self-care behavior among people at high risk of stroke. The findings shed light that nurses and other healthcare professionals should promote self-care behavior in these people by enhancing them to maintain proper functioning, positive illness-related perception, and family members' involvement. However, further study is needed to determine a causal relationship between these factors with self-care behavior.
Let’s put mental health problems and related issues appropriately in social media: A voice of psychiatric nurses
Authors: Saputra Fauzan , Uthis Penpaktr , Sukratul Sunisa
Published: February 2023

Social media is one convenient way to express ourselves. Much information is offered; most is difficult to filter and can be consumed by anyone, anywhere, anytime. However, sometimes it crosses the boundaries of someone else’s life or privacy, especially when discussing sensitive issues, such as mental health problems. There are a lot of discussions about whether bringing the personal experiences of people with mental health problems to the public domain can potentially increase the community’s attitudes toward them or not. Still, one thing is for sure, this kind of content has caught public attention by having more viewers. Unfortunately, it potentially brings other consequences for people with mental health problems, such as stigmatization, discrimination, and sadfishing. Therefore, this paper aims to provide the viewpoints of psychiatric nurses regarding how to address mental health-related issues and appropriately put content about mental health problems on social media.
Exploring the future of nursing: Insights from the ChatGPT model
Authors: Gunawan Joko
Published: February 2023

This editorial aims to provide a comprehensive overview of the future of nursing through the lens of the ChatGPT model, a state-of-the-art language processing artificial intelligence (AI) developed by OpenAI. The edited chat transcripts with ChatGPT may offer key trends and developments in nursing, such as the increasing use of technology and digital tools, the integration of AI, and the use of robotics in patient care, as well as insights into the implications of these changes for nurses, patients, and the healthcare system as a whole. However, the future of nursing is continuously evolving. Therefore, nurses need to keep abreast of the latest developments and adapt to them while remaining committed to providing quality care.
A Hopeful Gamble: Living the Faith as Migrant Workers and Transnational Mothers
Authors: Reyes-Espiritu Ma. Adeinev M.
Published: February 2023

This article is based on a qualitative research study involving Filipinas who are both migrant workers in Kuwait, Italy, Hong Kong and Taiwan and mothers of children aged between 0 and 18 years at the time of their departure from the Philippines. The article seeks to answer the following question: how does one’s Christian faith assist women in coping with labour migration and the resulting transnational mothering? In an analysis of data gathered from the participant mothers, the concept of ‘strategising to gain access to a better life’ emerges as central to how the participants navigate transnational mothering as labour migrants. In particular, the participant mothers identify their faith as one of the factors in which they invest. From a theological perspective, such ‘investing in faith’ is interpreted as an integral component of an ongoing spirituality that is hinged on an active relationship with God. On the one hand, their experience of living the faith reveals encountering the sacred in mundane events, amidst the challenges associated with labour migration and transnational mothering. On the other hand, their experience of hopeful gambling attests to the reality of evil or ‘dis-grace’ in the here and now.
A novel shark single-domain antibody targeting OGT as a tool for detection and intracellular localization
Authors: Xi Xiaozhi , Xiao Guokai , An Guiqi , Liu Lin , Liu Xiaochun , Hao Peiyu , Wang Jennifer Yiyang , Song Dandan , Yu Wengong , Gu Yuchao
Published: February 2023

Introduction

O-GlcNAcylation is a type of reversible post-translational modification on Ser/Thr residues of intracellular proteins in eukaryotic cells, which is generated by the sole O-GlcNAc transferase (OGT) and removed by O-GlcNAcase (OGA). Thousands of proteins, that are involved in various physiological and pathological processes, have been found to be O-GlcNAcylated. However, due to the lack of favorable tools, studies of the O-GlcNAcylation and OGT were impeded. Immunoglobulin new antigen receptor (IgNAR) derived from shark is attractive to research tools, diagnosis and therapeutics. The variable domain of IgNARs (VNARs) have several advantages, such as small size, good stability, low-cost manufacture, and peculiar paratope structure.

Methods

We obtained shark single domain antibodies targeting OGT by shark immunization, phage display library construction and panning. ELISA and BIACORE were used to assess the affinity of the antibodies to the antigen and three shark single-domain antibodies with high affinity were successfully screened. The three antibodies were assessed for intracellular function by flow cytometry and immunofluorescence co-localization.

Results

In this study, three anti-OGT VNARs (2D9, 3F7 and 4G2) were obtained by phage display panning. The affinity values were measured using surface plasmon resonance (SPR) that 2D9, 3F7 and 4G2 bound to OGT with KD values of 35.5 nM, 53.4 nM and 89.7 nM, respectively. Then, the VNARs were biotinylated and used for the detection and localization of OGT by ELISA, flow cytometry and immunofluorescence. 2D9, 3F7 and 4G2 were exhibited the EC50 values of 102.1 nM, 40.75 nM and 120.7 nM respectively. VNAR 3F7 was predicted to bind the amino acid residues of Ser375, Phe377, Cys379 and Tyr 380 on OGT.

Discussion

Our results show that shark single-domain antibodies targeting OGT can be used for in vitro detection and intracellular co-localization of OGT, providing a powerful tool for the study of OGT and O-GlcNAcylation.
B cell depletion therapies in autoimmune diseases: Monoclonal antibodies or chimeric antigen receptor-based therapy?
Authors: Zhang Zheng , Xu Qian , Huang Liang
Published: February 2023

Immune system detects foreign pathogens, distinguishes them from self-antigens and responds to defend human body. When this self-tolerance is disrupted, the overactive immune system attacks healthy tissues or organs and the autoimmune diseases develop. B cells and plasma cells contribute a lot to pathogenesis and persistence of autoimmune diseases in both autoantibody-dependent and autoantibody-independent ways. Accumulating data indicates that treatments aiming to eliminate antibody-secreting cells (B cells or plasma cells) are effective in a wide spectrum of autoimmune diseases. Monoclonal antibodies (mAbs) deplete B cell lineage or plasma cells by signaling disruption, complement-dependent cytotoxicity (CDC) and antibody-dependent cellular cytotoxicity (ADCC). Engineered-T cells armed with chimeric antigen receptors (CARs) have been adopted from field of hematological malignancies as a method to eliminate B cells or plasma cells. In this review, we update our understanding of B cell depletion therapies in autoimmune diseases, review the mechanism, efficacy, safety and application of monoclonal antibodies and CAR-based immunotherapies, and discuss the strengths and weaknesses of these treatment options for patients.
Infant food users' perceptions of safety: A web-based analysis approach
Authors: Aline Sherman , Hubert Gilles , Pitarch Yoann , Thomopoulos Rallou
Published: February 2023

This paper aims to explore consumer beliefs about health hazards in infant foods by analyzing data gathered from the web, focusing on forums for parents in the UK. After selecting a subset of posts and classifying them by topic, according to the food product discussed and the health hazard discussed, two types of analyses were performed. Pearson correlation of term-occurrences highlighted what hazard-product pairs are most prevalent. Ordinary Least Squares (OLS) regression performed on sentiment measures generated from the texts provided significant results indicating positive or negative sentiment, objective or subjective language, and confident or unconfident modality associated with different food products and health hazards. The results allow comparison between perceptions obtained in different countries in Europe and may lead to recommendations concerning information and communication priorities.
Opium consumption and long-term outcomes of CABG surgery in patients without modifiable risk factors
Authors: Sheikhy Ali , Fallahzadeh Aida , Nayebirad Sepehr , Nalini Mahdi , Sadeghian Saeed , Pashang Mina , Shirzad Mahmoud , Salehi-Omran Abbas , Mansourian Soheil , Bagheri Jamshid , Hosseini Kaveh
Published: February 2023

Background

The question about the significance of opium consumption as a coronary artery disease (CAD) risk factor still remains open. The present study aimed to evaluate the association between opium consumption and long term outcomes of coronary artery bypass grafting (CABG) in patients without standard modifiable CAD risk factors (SMuRFs; hypertension, diabetes, dyslipidemia, and smoking).

Methods

In this registry-based design, we included 23,688 patients with CAD who underwent isolated CABG between January 2006 to December 2016. Outcomes were compared in two groups; with and without SMuRF. The main outcomes were all-cause mortality, fatal and nonfatal cerebrovascular events (MACCE). Inverse probability weighting (IPW) adjusted Cox's proportional hazards (PH) model was used to evaluate the effect of opium on post-op outcomes.

Results

During 133,593 person-years of follow-up, opium consumption was associated with increased risk of mortality in both patients with and without SMuRFs (weighted Hazard Ratio (HR)s: 1.248 [1.009, 1.574] and 1.410 [1.008, 2.038], respectively). There was no association between opium consumption and fatal and non-fatal MACCE in patients without SMuRF (HR = 1.027 [0.762–1.383], HR 0.700 [0.438–1.118]). Opium consumption was associated with earlier age of CABG in both groups; 2.77 (1.68, 3.85) years in SMuRF-less and 1.70 (1.11, 2.38) years in patients with SMuRFs.

Conclusion

Opium users not only undergo CABG at younger ages but also have a higher rate of mortality regardless of the presence of traditional CAD risk factors. Conversely, the risk of MACCE is only higher in patients with at least one modifiable CAD risk factor.
Feasibility Study for Otoacoustic Emission Hearing Assessment of Classical Music Students
Authors: Ayub Amna , Ballestero Eric
Published: February 2023

Since the introduction and enforcement of the Control of Noise at Work Regulations in 2008 continuing research has been undertaken on more than four thousand students at the Royal Academy of Music to understand their hearing acuity. Standard pure tone audiometric screening methods were
employed for both entry and exit testing for the undergraduate students. Due to COVID standard audiometry was not possible, however it presented an opportunity to trial otoacoustic emission based hearing assessment. A feasibility study was undertaken in July 2021 involving 119 classical music
students. The results showed very similar trends in hearing and thus provide reassurance that OAE can be used to assess the hearing of music students.
Study on regional road network planning based on time and noise integrated resistance function
Authors: Wu Zhipeng
Published: February 2023

To rationally reduce traffic noise emission from road network from the perspective of planning, a regional traffic flow distribution method combining time and noise integrated resistance function is proposed, and the method is applied in a typical region to verify its reasonability
and practicability. Firstly, according to Greenshields model, the relationship among three traffic parameters (velocity, density and flow) is described, and combined with a line-source emission model of traffic noise, a univariate noise prediction model based on flow is established. Then,
with the establishing of the traffic noise resistance function, an integrated resistance model considering traffic noise impact and travel time impact is proposed, which is used for traffic flow distribution while in the road network planning process. Finally, the network planning is realized
utilizing the proposed method considering traffic noise. A network planning case in a typical region shows that the method can effectively reduce the noise emission of the regional network, which has practical value in traffic environment control.
Analysis of high frequency noise sources on air conditioning variable speed compressors
Authors: Almeida Vitor , Dei Agnoli Gabriel , Pinheiro Osmar , Feitosa Felipe
Published: February 2023

The improvement on energy consumption requires application of new technologies in existing products. On the past decades, optimization of power consumption on variable speed rotary compressors for air conditioning applications was achieved by replacing induction motors to brushless
DC (BLDC) motors driven by a frequency inversor. Besides the positive behavior of the motor type change on compressor efficiency, acoustic problems on the compressor became more complex. This article makes a revision of the main noise generation mechanism by BLDC motors of an air conditioning
compressor via numerical finite element and experimental analysis aiming a noise reduction on a tonal component around 8 kHz band. Results indicate harmonic components on the forces exciting some specific resonance frequencies of the stator. The harmonic components show up in the force signals
via pulse width modulation of the inverter electronic controller. The structure-born noise is radiated through the compressor shell. Among the possibilities to mitigate the noise issues, it was chosen to optimize the electronic control reduced the excitation levels of the stator and the tonal
component of 8 kHz band in about 10 dB improving the sound quality of the compressor.
Measurement of airborne sound insulation of building components by near-field acoustic holography
Authors: Xiong Wei
Published: February 2023

Taking the architectural acoustic design of a stadium and gymnasium in a sports center as an example, the acoustic parameters of large stadiums under different working conditions were explored. In order to improve the reliability of acoustic design of large stadiums, the acoustical
environment of stadiums is simulated and matched with the design standard value by using the sound absorbing materials arranged in limited positions.
Use of Sound "PHONONS' in the modelling and Optimisation of automotive acoustic systems in 3D
Authors: Morris-kirby Rodney
Published: February 2023

Automotive manufacturers demand components with an ever higher acoustic performance combined with lower environmental impact, tuned to the emerging EV market, and are pressured into reducing lead times and prototype investment. Consequently, there is a desire for enhanced simulation
techniques, utilizing advanced methods. The three-dimensional aspect of many palliative treatments can be shown to afford significant benefits to their acoustic performance, both in their transmission loss and random incidence absorption characteristics. Virtual system engineering enables
construction fundamentals to be created in CAD, but often acoustic treatments are chosen based on flat sample performance or simple power balance models. These do not tell the complete story. Current acoustic simulation techniques such as SEA, may present the model in a 3D environment to aid
in visualization but, solving is done on a 2D matrix basis, and does not account easily for diffusion and refractive interaction caused by the complex shape of the component under investigation. BEM and FEM techniques are 3D based simulations but have a host of limitations due to mesh density
and available processing power. Constructing models of individual palliatives such as wheel arch liners, dash insulations or carpets using such techniques may be of academic interest but of restricted use in the pressured world of component design and manufacture. It is not helped by the need
to furnish the model with accurate, validated, material performance data. A modelling procedure was required that could import component CAD from the product design team and rapidly create an acoustic model that could accurately predict its performance in both a transmission loss suite and
associated random incidence "Alpha cabin" absorption test. Thus, short circuit the need for at least one if not more prototype test phases or enable quotations for new business to be formulated with a higher degree of clarity. Subsequently to export results from this model into a
range of "full vehicle" modelling environments or compare to prototype test results. After considerable research the authors created and validated a toolbox approach using a combination of open-source code together with bespoke modifications and defined processing procedures.
Testing the active minimization of the total radiated sound power of a vibrating plate
Authors: Hajilou Mehran , Sachau Delf
Published: February 2023

This paper presents an experimental investigation of an Active-Noise-Control (ANC) system for reducing unwanted so-called primary sound by destructive interference with sound generated by so-called secondary sources (loudspeakers). In this work the primary source is a vibrating simply
supported plate which is radiating sound into the free field. The loudspeakers are placed in front of the plate. The ANC-system utilizes the measured signals of the primary accelerometers which are placed on the surface of the plate. The number of the primary accelerometers corresponds to
the number of the loudspeakers. Also, one secondary accelerometer is fixed onto each loudspeaker cone. Furthermore, a microphone in front of each loudspeaker measures the near field sound pressure. An adaptive feed-forward-controller is used to calculate the optimal control signal for each
secondary source. The optimal control is achieved by minimizing the radiated active sound intensity in front of each loudspeaker in order to minimize the total radiated sound power of the primary and secondary sources. The ANC-system is tested in different configurations with one or two loudspeakers
in front of the plate. Also, an approach for the system calibration is developed to compensate the phase deviation between the true and the measured sound intensity.
Methods for product sound design: a correlation between annoyance and sound quality of noise emitted by household appliance
Authors: Di Loreto Samantha
Published: February 2023

The sound quality analysis, used as a tool for the product design, has been defined and described in the literature and the characteristics describing the type of sound have been identified. However it is often not known how the subjective assessments and the human factor are taken
into account in the procedure governing the studies of sound quality. Today making a product as quiet as possible is one of the most captivating challenge for the industrial sector, especially if it is for a household appliance. This case study show how the consumer perception of product sound
quality is a fundamental variable to define the sound character. The classification of sound quality is based on the correlation between an objective measurement and the subjective judgment result. Psychoacoustic metrics like Loudness, Sharpness and Roughness, and the combinations of them
into more sophisticated models, like annoyance, pleasantness and powerfulness are commonly used for analysis and prediction of product sound quality. However, some problems arise when the sounds are analyzed by different consumers. It is assumed that the reason for this is the human not ability
to understand the difference between noise and annoyance and to focus consciously or unconsciously on the sound emitted by the appliance. For this reason the aim of this work is to validate a method to calculate a sound quality index applicable to the sounds produced by five kitchen hoods
in a real installation condition.
Absorption characteristics analysis of membrane sound absorber with magnet
Authors: Zhao Junjuan , Wang Yueyue , Wang Wenjiang , Zhu Liying , Li Xianhui , Yang Min
Published: February 2023

This paper presents a membrane sound absorber (MSA) with tunable properties for low-frequency sound absorption. A simple method to predict the resonance frequency is proposed; the resonate frequencies predicted show good agreements with the experimental ones. The analysis indicate that
the iron-platelet-magnet resonance mechanism introduced by the tuned magnetic field is the main factor leads to the appearance and shift of absorption peaks in low-frequency region, which are almost independent of the back cavity. This demonstrates that the structure has strong potential to
achieve an extremely thin and low-frequency tunable-sound-absorption design which can be easily adapted to the noise source variation.
RENAULT Smart Cocoon Technology CAE
Authors: Mordillat Philippe
Published: February 2023

RENAULT was the first OEM to introduce mass production Battery Electric Vehicles in Europe with the ZOE in 2012. With the new Megane ETECH, RENAULT set the NVH comfort to higher level to match the customer expectations on BEV vehicles. One of the components that contributes to the silence
of Megane is the "Smart Cocoon Technology". This innovative solution has been developed to transform the battery into an acoustically active element. An insulation foam has been embedded between the body floor and the battery casing in order to use the battery mass to improve the
floor transparency and damping, and subsequently the Transmission Loss. To support further developments of this technology RENAULT and its CAE partners are developing a simulation methodology to achieve simultaneously three goals: predict the behavior of the smart cocoon technology on the
whole vehicle NVH performance, optimize the performance and weight of the insulation package, and secure the assembly process. This paper presents in detail each step of this process. Non-linear simulations of the battery assembly process are used to capture the preloading effects in foam
and body panels. The vehicle high frequencies NVH performance is then simulated for vehicle rolling conditions. In a last part of the paper, CAE results are compared with the test measurements on the Megane prototype.
A Practical Method to Increase the Low Frequency Sound Insulation of Timber Frame Constructions
Authors: Newman Michael , Brekke Arild , Ellingsen Ståle , Eikeland Frode
Published: February 2023

Timber framed houses have little or no sound insulation at low frequencies. A significant set of noise sources emit loud low frequency noise and for some of these, the noise is single frequency or tonal. Improvement of the low frequency insulation has been shown using two methods: increasing
the stiffness and applying vibration neutralizers to the structure of the house. A study was carried out on a wall element to assess the viability of the method in a simplified test facility. Impedance measurements were carried out on a test section consisting of 3 studs and panel construction.
An initial field implementation has been carried out on a re-purposed dwelling at the end of the runway at Bergen's airport. Reductions of the order of 5-10dB in the C-weighted indoor noise level have been achieved. The additional attenuation achieved using vibration neutralisers only has
effect when the outside noise level exceeds 87dBC.
Enhanced micro-perforated wall-treatments for reducing the boundary layer noise in a low-speed wind-tunnel: modelling, characterization and optimization studies.
Authors: Bravo Teresa , Maury Cedric
Published: February 2023

Micro-perforated aero-acoustic liners are robust non-fibrous wall-treatments able to achieve significant axial attenuation in low-speed ducted flows, if their input impedance is suitably optimized. They are also potential candidates for broadband reduction of the flow-induced noise,
useful to increase the signal-to-noise ratio in wind-tunnels test section or for fan noise control when inserted in casing treatments. The current theoretical and experimental study determines under which range of frequencies, holes diameter and free stream flow velocity, micro-perforated
partitions are able to efficiently reduce the boundary layer noise, either by absorption or transmission mechanisms, depending on the spectral content of the aero-acoustic excitation. The formulated analytical models, either modal- or wavenumber-based, are validated against wind-tunnel measurements
of the overall power injected by a low-speed boundary layer into a micro-perforated partition and its aerodynamic transmission loss. A hole-based Strouhal number is found below which little back-scattering of the wall-pressure components occurs. Optimization studies are performed to determine
the range of parameters that enhance the total absorption or transmission of boundary layer noise, with special emphasis on the low frequency content of the wall-pressures.
Construction of motional phase maps for granular dampers
Authors: Terzioglu Furkan , Rongong Jem A. , Lord Charles E.
Published: February 2023

Harmonically vibrated granular media exhibit a variety of motional behaviours depending on amplitude, frequency, and vibration-to-gravity directional orientation. Motional behaviour defines the physical interactions of particles in the granular media and therefore the energy dissipation
performance. A "phase map" that describes motional behaviour over broad ranges of frequency and amplitude is therefore a very useful tool in damper design. However, at present, identification of the operating motional conditions within the granular media has only been conducted by
visual observation of the particles following a particle-level simulation or a specifically designed experiment. Because of this, design optimisation over a broad range of amplitude and frequency becomes costly. This paper aims to help reduce this cost through the development of approximate
phase maps based on expected dissipative interactions of particles. Three-dimensional discrete element method simulations are conducted over a wide range of excitation intensities under two different vibration-to-gravity directional orientations (i.e., perpendicular, and parallel to the standard
gravity direction) to allow the observation of as many motional phases as possible. The effect of particle size, volume filling ratio and particle shape on granular energy dissipation sources are also investigated.
BS 4142:2019 - Methods for rating and assessing industrial and commercial sound - the past, the present and future developments - a history.
Authors: Dunbavin Philip
Published: February 2023

BS 4142 is the UK's principal assessment method for quantifying industrial / commercial noise impact. It is surprising to realise that this standard is nearly sixty years old. The first draft of the document that was to become BS 4142 was being prepared in 1962 and was first published
early in 1963 as the final report of the Wilson Committee on the problem of noise. As a young acoustician, I like many others, regarded British, and all standards in general, as tablets of stone that were immutable. As I gained in experience it became obvious that this was not true. In fact
all standards are periodically reviewed, every five years in the case of a British Standard, to determine if they still reflect the current available evidence that underpins them. The current version of BS 4142 would be virtually unrecognisable to those esteemed authors of the Wilson Report
all those sixty years ago. This paper traces the history of BS 4142 from its birth in the Wilson Report, through its revisions, many of which were extremely controversial at the time, to its current iteration. Change is coming with a review and potential revision in 2024 and this paper examines
the current developments, both in research and standardisation, that may have significant impacts on this review process and the future development of BS 4142.
Two-step optimization design of a periodic beam with acoustic black holes
Authors: Sheng Hui , Sheng Hui
Published: February 2023

This paper presents a two-step optimization method to design the acoustic black holes (ABH) profiles according to local property in the target frequency region. In the first step, the concept of 'local index' is used to identify the position of local vibration. Then, as the second step,
the ABH parameters are multi-objective optimized. The numerical examples indicate that the two-step optimization provide a set of Pareto solutions for lightweight ABH design with board bandgaps. To reveal the mechanism of the attenuation band, the vibration modes of the structure are analyzed
and the local property of the ABH is shown. Using dynamic and static characteristics as objective functions, the proposed method provides a way to merge physical meaning in the process of data-based optimization.
The tyre/road noise comparison of SMA 11 and cobblestone pavement
Authors: Hablovičová Blanka , Marková Petra , Křivánek Vítězslav
Published: February 2023

Noise has a big influence to human health. The major source of noise in residential areas is traffic, especially the contact between tyre and pavement of road (tyre/road noise). Asphalt is the most used pavement in residential areas, but cobblestones, for example, are used in historic
parts of cities. There are relatively a few road surfaces with cobblestones, but with regard to noise, it is very important to monitor their acoustical behavior. Article compare the tyre/road noise of the stone mastic asphalt with the maximum grain size 11 mm and cobblestones measured by the
Close-Proximity method in 2021. The measurements were performed on the same road within the following sections at velocities from 30 to 90 km/h. The results are presented as values of sound pressure level and frequency spectra.
"You are on mute": the impact of indoor soundscape on sexual well-being during the COVID-19 lockdown
Authors: Torresin Simone , Ratcliffe Eleanor , Aletta Francesco , Albatici Rossano , Babich Francesco , Oberman Tin , Kang Jian
Published: February 2023

Sexual well-being is a fundamental facet of the overall well-being of individuals and implies the ability to have safe and pleasurable sexual experiences, beyond the absence of disease or disturbance. The extent to which people can achieve sexual well-being depends, among other aspects,
on whether they live in an environment that promotes and support it. The present study focuses on the unexplored impacts of the perceived acoustic environment (i.e., the soundscape) on human sexual activity carried out in domestic settings. Verbal descriptions have been gathered from open-ended
questions included in a survey administered to 848 respondents living in London (UK) and in Italy in January 2021 during the COVID-19 lockdown. Thematic analysis was used to extract a framework detailing the positive and negative impacts of the acoustic environment on sexual activity. The
results show the mechanisms by which the acoustic features of the environment can impact on the sexual experience in terms of privacy, distraction, disruption or support, up to trigger coping strategies (e.g., controlling windows, playing music) and behavioural changes (e.g., lowering the
volume of the voice) that can in turn limit or enhance the freedom of sexual behaviour, affect or foster sexual well-being.
Dynamic analysis of negative stiffness noise absorber with magnet
Authors: Yang Min , Xiao Weiming , Han Erjing , Zhao Junjuan , Wang Wenjiang , Liu Yunan
Published: February 2023

In the paper, the negative stiffness membrane absorber with magnet has been taken as a nonlinear noise absorber. The dynamic characteristics of the nonlinear noise absorber have been studied by nonlinear dynamics theory and numerical simulation. The dynamic equations of the system were
established under harmonic excitation. The slow flow equations of the system are derived by using complexification averaging method, and the nonlinear equations which describe the steady-state response are obtained. Bifurcation diagram, amplitude frequency diagram and phase diagram are used
to study the nonlinear response of structures under different excitation conditions. The effects of excitation amplitude, excitation frequency, nonlinear term and structural parameters on the nonlinear dynamic characteristics and sound absorption characteristics of the structure are studied.
The resulting equations are verified by comparing the results which respectively obtained from complexification-averaging method and Runge-Kutta method. It is helpful to optimize the structural parameters and further improve the sound absorption performance to study the variation of the sound
absorption performance of magnet negative stiffness membrane absorber system with its structural parameters.
Application of the SVM algorithm for the development of a model classification of the visual and sound landscape
Authors: Di Loreto Samantha , Serpilli Fabio , Lori Valter
Published: February 2023

To ensure adequate management of the soundscape in urban environments, urban planning authorities need a range of tools that enable them to perform this condition. Analyzing and classifying a soundscape is necessary to adapt it to the expectations of the people who inhabit it. The term
Soundscape is associated with three different research areas: ecology / anthropology, music / sound design and architecture / urbanism. In particular, in this paper, the third research area will be investigated, finding a correlation model between auditory and visual sensations of the urban
landscape of the port of Ancona. The classification model that is used is the Support Vector Machines SVM which is proposed as a tool for a global assessment of the urban sound landscape. In this case study the algorithm is intended for the automatic classification of the sound landscape of
the port of Ancona to understand how much the sound perception affects the visual one. The main results obtained are illustrated: - 75 participants were selected who, after spending time in the indicated place, filled out a questionnaire consisting of 20 questions for the evaluation of the
visual environment and 20 questions for the evaluation of the sound environment. - The training set (train \ _data) will consist of 1500 samples for images and 1500 samples for sounds. - By applying the fitcsvm (SMO) algorithm, the value of each parameter used for the implementation algorithm
was obtained and a random partition of the data was performed for a k-Fold cross-validation. -Finally, the hyperplane equation of our specific system was calculated.
Long-term evolution of noise annoyance depends on the type of transportation noise - what are the main drivers for the observed trends and their differences?
Authors: Wunderli Jean Marc , Brink Mark
Published: February 2023

Transportation noise annoyance has been investigated in a widely standardized way over the last decades, which allows studying the evolution of exposure-response relationships over time. A comparison reveals an increase of high annoyance in recent studies for railway and especially
aircraft noise, compared to rather stable relationships for road traffic noise. Yet the reasons for these disparate developments remain only little explored, particularly for railway noise. In this contribution, potential explanations for the observed divergences are discussed, namely changing
values and expectations in society, changing semantics of words used in survey instruments, changes in the attitude towards the different types of traffic, and changes in exposure strength and characteristics. On that basis, considerations are made about the suitability of noise annoyance
as a noise effect informing noise limits.
The influence of the modes of surrounding buildings on the ground vibration from railways
Authors: Qu Xiangyu , Thompson David , Ntotsios Evangelos , Squicciarini Giacomo
Published: February 2023

To improve the accuracy of railway induced ground vibration predictions, the influence of surrounding buildings should be considered. For this reason, a fast semi-analytical model is developed to investigate the vibration of the ground and the influence of a nearby building. The model
contains two sub models: a finite element model which can simulate the building, and a semi-analytical model which can simulate the infinite free-field ground. The dynamic stiffness matrix method is used to simulate the ground as a homogeneous or layered half-space. The ground model works
in the frequency-wavenumber domain and is based on the Green's functions developed for a half-space. Focusing on a building with a piled foundation, the coupling forces due to soil-structure interaction at coupled pile nodes are calculated assuming that the soil and pile displacements are
identical. The results from the proposed model show that the vertical modes of the building, especially those that involve the vertical movement of the floors, can significantly influence the vibration of the surrounding ground. The findings suggest that when predicting the ground surface
response induced by the railway, the surrounding buildings and their vertical modes should be included in the calculations.
Role of community engagement in soundscape design of rural areas
Authors: Smyrnowa Julija , Brown Gillian
Published: February 2023

This paper presents results of questionnaires adapted from ISO 12913-2 distributed among the residents of a rural area, following numerous complaints of noise and other pollution from a recently build waste transfer station in the UK. Based on acoustic measurements, specific sound levels
from the industrial site were predicted at each of the respondents' assessment location. Participants included those who lived as close to the site as 200m where the sound from the site was +15dB above background sound level (BGL), and as far as 800m with the sound from site -10dB above BGL.
Surprisingly, all the respondents indicated that they could hear sounds from the industrial site to a higher or lower extent, they were all extremely stressed and annoyed by it and they all desired it to be supressed. The outcomes of the study demonstrate that (1) soundscape is a multidisciplinary
approach, (2) soundscape assessment in rural areas may vary from those designed for urban areas, and (3) early engagement with local residents when introducing a new industrial sound to the soundscape in a rural area may result in a better chance of approval, particularly for a site with potential
economic benefits for the community. This paper also discusses how the soundscape approach, alongside tackling conventional noise problems, may contribute to environmental management and local planning in rural areas, particularly focusing on introducing and managing sounds from industrial
sites.
Shore power connection for offshore vessels - Measured noise reduction in port and dock
Authors: Larsen Bernt Mikal
Published: February 2023

The presentation will summarize measured noise reduction for drilling, pipelay and offshore support vessels due to shore power connection. The noise level at office or storage building in distance of 100-250 m from the vessels has been registered continously through days and nights.
Noise levels at nights without and with shore power connection has been compared. A drilling vessel had Lw 110 dB and a noise reduction due to shore power connection of 18 dB. A pipelay vessel had Lw 105 dB without shore power, and a noise reduction of 15 dB due to the effect of shore power.
Both drilling and pipelay vessel seem to have Lw of 90-92 dB with shore power connection. Two different offshore support vessels have also been measured with sound power level Lw of 107 dB and 100 dB. The noise reduction with shore power connection is 13 dB for the first and 6-7 dB for the
latter. With shore power connection, both offshore suppert vessels have Lw of 94 dB. The sound power level with shore power connection seems to be limited by the fact that ship noise level from ventilation and fans seems to be the same.
Distinct influence of everyday noise on cardiovascular stress
Authors: Christensen Jeppe , Andersson Klaudia , Neher Tobias
Published: February 2023

High-intensity environmental noise is known to be detrimental to cardiovascular health. However, individual differences have not been considered, and reported effects cannot be generalized to noise levels reflecting everyday life. Here, we explore the relationship between daily-life
sound exposure and heart rate with longitudinal data from ten individuals across three weeks. We analyze the daily short-term covariation between changes in heart rate and sound intensity using multi-level regression and Granger analysis. We find strong evidence that everyday sound exposure
is related to heart rate in all participants. Sound intensity is linearly and positively related to heart rate, while the ambient signal-to-noise ratio has a negative association to heart rate in louder environments. Across participants we establish a distinct temporal pattern of Granger causality
with stronger influence of the sound environment on heart rate from 6:00 hrs to 16:00 hrs than for the rest of the afternoon/evening. We propose that sound sensitivity measures represent a combination of the amount of effort asserted to listen under noisy conditions during the active periods
of a day and the direct physiological sound-induced stress reaction. A thorough understanding of both factors is necessary to determine the full extent to which everyday noise influence long-term health.
Experimental study on electromechanical performance decoupling and vibration suppression of crystal oscillator
Authors: Gu Zhangqi , Yu Qingqing , Peng Xuelin
Published: February 2023

In the mechanical vibration environment, the phase noise of crystal oscillator would deteriorate sharply, which would lead to the decline of the stability of crystal oscillator and affect the comprehensive performance of the whole electronic equipment. In this paper, the mechanism of
electromechanical coupling between mechanical vibration and phase noise is analysed theoretically. The relationship between phase noise and vibration magnitude and the sensitivity of phase noise to different vibration frequencies and directions are studied experimentally, then the decoupling
of mechanical performance and electrical performance is realized. Based on this, a vibration isolator for crystal oscillator is designed, which can achieve 15-2000Hz full frequency band random vibration attenuation, the vibration acceleration RMS value is reduced by 95%, and the phase noise
degradation of crystal oscillator is less than 5dB. The research has a certain reference value for the vibration isolation design of electromechanical coupling vibration sensitive devices.
Relationships between Acoustics, Thermal, Indoor Air Quality, and Lighting Conditions on Student Achievement in K-12 Classrooms
Authors: Wang Lily
Published: February 2023

Data on acoustic, thermal, indoor air quality, and lighting conditions have been collected from 220 classrooms in the midwestern United States. Gathered acoustic data include sound levels logged every 10 seconds and room impulse responses from which reverberation times were extrapolated.
K-means clustering was used to group the logged sound data into times when speech was or was not occurring; then acoustic metrics were calculated from the clustered data. When comparing the measured acoustic conditions to ANSI S12.60, 91% of the classrooms did not meet the recommended maximum
background noise level for unoccupied conditions, while 15% did not meet the recommended maximum reverberation time. The field measurements also revealed that only 20% of the classrooms met ASHRAE Standard 62.1 ventilation rate requirements, while all classrooms met recommended IES illuminance
level for reading and writing. Multivariate linear regression analyses between the environmental conditions and student achievement data, while controlling for student demographics, have identified a number of significant relationships. This presentation summarizes key results, describes how
acoustic conditions were correlated to building mechanical systems, and considers how indoor environmental quality may be optimized to benefit occupants in educational settings. [Work supported by the United States Environmental Protection Agency Grant Number R835633.]
Low-order network modelling of the effect of Helmholtz resonators on nonlinear thermoacoustic modes in annular combustors
Authors: Yin Liming , Yang Dong
Published: February 2023

Modern aero-engines and land-based gas turbines often use annular combustors where many burners are installed in the circumferential direction. These combustors are often operated under lean-premixed pre-vaporized (LPP) conditions in which the flames are more susceptible to acoustic
perturbations than traditional combustion systems. The resulted thermoacoustic instabilities may involve mode patterns varying in both longitudinal and circumferential directions. When nonlinear flame models are considered, our previous work proved that a 2-D low-order network model can capture
limit cycle oscillations involving uncoupled and nonlinearly coupled modes, including longitudinal, circumferentially spinning/standing, and slanted modes. This kind of low-order network modelling tool has been recognised as a computationally efficient way of analysing thermoacoustic instabilities
in annular combustors. Helmholtz resonators (HRs) are widely used to damp acoustic oscillations. For thermoacoustic instabilities in annular combustors, the presence of the HRs causes modal coupling and mode shape change. For nonlinearly coupled thermoacoustic modes, it is difficult to predict
the change of modality accurately. In this paper, HRs are incorporated into the aforementioned low-order network model. The effect of HRs on different nonlinear thermoacoustic mode patterns are studied in detail. This provides a powerful low-order network modelling tool for studying the damping
performance of HRs on nonlinear thermoacoustic modes in annular combustors.